-
-
-/***********************************************************
- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
+/*
+ * Copyright 1989 by Carnegie Mellon University
+ *
+ * All Rights Reserved
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose and without fee is hereby granted,
+ * provided that the above copyright notice appear in all copies and that
+ * both that copyright notice and this permission notice appear in
+ * supporting documentation, and that the name of CMU not be
+ * used in advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ *
+ * CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+ * CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
/*
* snmp_api.c - API for access to snmp.
*/
}
}
-#if 0
+#if UNUSED_CODE
/*
* Gets initial request ID for all transactions.
*/
if (response) snmp_free_pdu(response);
**/
}
-#if 1/***/ BUG_SNMPTRACE */cked for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
-\10\0=p\7fÿ³3\7fÿ³B\7fÿ³S\7fÿ³]\7fÿ³i\0\0\0\18\7fÿ³\82\0\0\0\ 1\7fÿ³ \7fÿ³\7fÿ³º\7fÿ³Ê\7fÿ³×\0\0\0Á\7fÿ³ù\0\0\0\10\7fÿ´\10\10\0=ø\0%\0\19\0\15\0\0\10\0D(\0\0\0\10\7fÿ´_\10\0=à\0\0\ 2\\0\0\0\0\10\0BØ\0\0\0\10\7fÿ´©\10\0=\98\0\0\ 24\0\0\0\0\10\0BØ\0\0\0\10\7fÿ´ø\10\0=È\0\0\ 2H\0\0\0\0\10\0BØ\0\0\0\10\7fÿµB\10\0>\10\7fÿµ]\7fÿµm\7fÿµz\0\0\0\10\7fÿµ \10\0>(\7fÿµ·\7fÿµÉ\7fÿµÖ\0\0\0\10\7fÿµï\10\0>@\7fÿ¶\12\7fÿ¶ \7fÿ¶4\0\0\0\10\7fÿ¶P\0\0\0\ 1\7fÿ¶r\7fÿ¶~\7fÿ¶\88\0\0\00\7fÿ¶\9f\10\04¨\7fÿ¶·\0\0\0\0\7fÿ¶Ù\10\0\89è\7fÿ·\ 1\0\0\0\0\7fÿ·#\7fÿ·/\7fÿ·>\10\0>X\7fÿ·V\0\0\03\0\0\0\0/usr/people/wessels/.indent.pro\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 4\ 1\0\0\0\0\7fÿ¯è\7fÿ¯ù\7fÿ°\f\7fÿ°\e\7fÿ°.\7fÿ°?\7fÿ°M\7fÿ°[\7fÿ°p\7fÿ°\85\7fÿ°\95\7fÿ°£\7fÿ°²\7fÿ°Å\7fÿ°Û\7fÿ°ñ\7fÿ±
-\7fÿ±\1e\7fÿ±2\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\7fÿ±\99\7fÿ±«\7fÿ±º\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\7fÿ²\ f\7fÿ²\1d\7fÿ²2\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\7fÿ²\7f\7fÿ²\8a\7fÿ²\99\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\7fÿ²ö\7fÿ³
-\7fÿ³ \7fÿ³3\7fÿ³B\7fÿ³S\7fÿ³]\7fÿ³i\7fÿ³s\7fÿ³\82\7fÿ³\91\7fÿ³ \7fÿ³\7fÿ³º\7fÿ³Ê\7fÿ³×\7fÿ³ç\7fÿ³ù\7fÿ´\ 4\7fÿ´\10\7fÿ´\1e\7fÿ´)\7fÿ´3\7fÿ´C\7fÿ´O\7fÿ´_\7fÿ´k\7fÿ´t\7fÿ´\81\7fÿ´\8f\7fÿ´\9f\7fÿ´©\7fÿ´·\7fÿ´Å\7fÿ´Ò\7fÿ´Ý\7fÿ´í\7fÿ´ø\7fÿµ\ 3\7fÿµ\10\7fÿµ\1d\7fÿµ)\7fÿµ7\7fÿµB\7fÿµM\7fÿµ]\7fÿµm\7fÿµz\7fÿµ\89\7fÿµ \7fÿµ«\7fÿµ·\7fÿµÉ\7fÿµÖ\7fÿµâ\7fÿµï\7fÿ¶\ 3\7fÿ¶\12\7fÿ¶ \7fÿ¶4\7fÿ¶?\7fÿ¶P\7fÿ¶b\7fÿ¶r\7fÿ¶~\7fÿ¶\88\7fÿ¶\94\7fÿ¶\9f\7fÿ¶«\7fÿ¶·\7fÿ¶É\7fÿ¶Ù\7fÿ¶í\7fÿ·\ 1\7fÿ·\15\7fÿ·#\7fÿ·/\7fÿ·>\7fÿ·L\7fÿ·V\7fÿ·f\7fÿ·q\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0@ \0\0\0\0
-
-/***********************************************************
- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] =
-{1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests; /* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] =
-{
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR) {
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp()
-{
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *) 0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-
-#endif
-
/*
- * Dump snmp packet to stdout:
+ * Unlink one element from input request list,
+ * then free it and it's pdu.
*/
static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
+free_one_request(isp, orp)
+ struct snmp_internal_session *isp;
+ struct request_list *orp;
{
- if (length < 0) {
+ struct request_list *rp;
+ if (!orp)
return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- } else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
+ if (isp->requests == orp) {
+ isp->requests = orp->next_request; /* unlink head */
+ } else {
+ for (rp = isp->requests; rp; rp = rp->next_request) {
+ if (rp->next_request == orp) {
+ rp->next_request = orp->next_request; /* unlink element */
+ break;
+ }
}
- printf("%02X ", (int) (packet[count] & 255));
}
-#endif
- fflush(stdout);
+ if (orp->pdu != NULL) {
+ snmp_free_pdu(orp->pdu);
+ }
+ free((char *) orp);
}
-#if DEBUG_SNMPTRACE
/*
- * Print request
+ * Free each element in the input request list.
*/
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
+free_request_list(rp)
struct request_list *rp;
- int code;
-{
- int reqid = 0, retries = 1;
- if (rp) {
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch (code) {
- case TRACE_SEND:
- printf("send pdu (%d)", retries);
- break;
- case TRACE_RECV:
- printf("recv pdu");
- break;
- case TRACE_TIMEOUT:
- printf("time out");
- break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *) calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *) calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *) isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *) calloc(1, sizeof(struct snmp_session));
- bcopy((char *) session, (char *) slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL) {
- cp = (u_char *) calloc(1, (unsigned) strlen(session->peername) + 1);
- strcpy((char *) cp, session->peername);
- session->peername = (char *) cp;
- }
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0)
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN) {
- if (*session->community == '+') {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community + 1, (char *) cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) DEFAULT_COMMUNITY, (char *) cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0) {
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)) {
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME) {
- if ((addr = inet_addr(session->peername)) != -1) {
- bcopy((char *) &addr, (char *) &isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL) {
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)) {
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *) hp->h_addr, (char *) &isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT) {
- /*servp = getservbyname("snmp", "udp"); */
- servp = NULL;
- if (servp != NULL) {
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *) &me, sizeof(me)) != 0) {
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (!snmp_close(session)) {
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
- if (*cp == '/') {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string(session);
- session->qoS |= USEC_QOS_GENREPORT;
- }
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent(session)
- struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy(session->userName, "public");
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS) {
- memcpy(session->agentID, response->params.agentID, 12);
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT) {
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit(-1);
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-ring(fp, token)
- FILE *fp;
- char *token;
-{
- int ch;
-
- ch = ' ';
- *token = '\0'; /* make the token empty */
-
- while (ch != -1) {
- ch = getc(fp);
- if (ch == '\n')
- Line++;
- else if (ch == '"') {
- return QUOTESTRING;
- }
- }
-
- return 0;
-}
-
-/*
- * This routine parses a string like { blah blah blah } and returns OBJID if
- * it is well formed, and NULL if not.
- */
-static int
-tossObjectIdentifier(fp)
- FILE *fp;
-{
- int ch;
-
- ch = getc(fp);
-/* ch = last; = ' '? */
- /* skip all white space */
- while (isspace(ch) && ch != -1) {
- ch = getc(fp);
- if (ch == '\n')
- Line++;
- }
- if (ch != '{')
- return 0;
-
- while (ch != -1) {
- ch = getc(fp);
-
- if (ch == '\n')
- Line++;
- else if (ch == '}')
- return OBJID;
- }
-
-/* last = ch; */
- return 0;
-}
-rn 0;
- }
- /*
- * Optional parts of the OBJECT-TYPE macro
- */
- type = get_token(fp, token);
- while (type != EQUALS) {
- switch (type) {
- case DESCRIPTION:
- type = get_token(fp, token);
- if (type != QUOTESTRING) {
- print_error("Bad DESCRIPTION", token, type);
- free_node(np);
- return 0;
- }
-#ifdef TEST
- printf("Description== \"%.50s\"\n", quoted_string_buffer);
-#endif
- np->description = quoted_string_buffer;
- quoted_string_buffer = (char *) calloc(1, MAXQUOTESTR);
- break;
-
- case REFERENCE:
- type = get_token(fp, token);
- if (type != QUOTESTRING) {
- print_error("Bad DESCRIPTION", token, type);
- free_node(np);
- return 0;
- }
- break;
- case INDEX:
- case DEFVAL:
- case AUGMENTS:
- case NUM_ENTRIES:
- if (tossObjectIdentifier(fp) != OBJID) {
- print_error("Bad Object Identifier", token, type);
- free_node(np);
- return 0;
- }
- break;
-
- default:
- print_error("Bad format of optional clauses", token, type);
- free_node(np);
- return 0;
-
- }
- type = get_token(fp, token);
- }
- if (type != EQUALS) {
- print_error("Bad format", token, type);
- free_node(np);
- return 0;
- }
- length = getoid(fp, oid, 32);
- if (length > 1 && length <= 32) {
- /* just take the last pair in the oid list */
- if (oid[length - 2].label)
- strncpy(np->parent, oid[length - 2].label, MAXLABEL);
- strcpy(np->label, name);
- if (oid[length - 1].subid != -1)
- np->subid = oid[length - 1].subid;
- else
- print_error("Warning: This entry is pretty silly", np->label, type);
- } else {
- print_error("No end to oid", (char *) NULL, type);
- free_node(np);
- np = 0;
- }
- /* free oid array */
- for (count = 0; count < length; count++) {
- if (oid[count].label)
- free(oid[count].label);
- oid[count].label = 0;
- }
- return np;
-}
-
-
-/*
- * Parses an OBJECT GROUP macro.
- * Returns 0 on error.
- */
-static struct node *
-parse_objectgroup(fp, name)
- FILE *fp;
- char *name;
-{
- int type;
- char token[MAXTOKEN];
- int count, length;
- struct subid oid[32];
- struct node *np;
-
- np = (struct node *) Malloc(sizeof(struct node));
- np->type = 0;
- np->next = 0;
- np->enums = 0;
- np->description = NULL; /* default to an empty description */
- type = get_token(fp, token);
- while (type != EQUALS) {
- switch (type) {
- case DESCRIPTION:
- type = get_token(fp, token);
- if (type != QUOTESTRING) {
- print_error("Bad DESCRIPTION", token, type);
- free_node(np);
- return 0;
- }
-#ifdef TEST
- printf("Description== \"%.50s\"\n", quoted_string_buffer);
-#endif
- np->description = quoted_string_buffer;
- quoted_string_buffer = (char *) calloc(1, MAXQUOTESTR);
- break;
-
- default:
- /* NOTHING */
- break;
- }
- type = get_token(fp, token);
- }
- length = getoid(fp, oid, 32);
- if (length > 1 && length <= 32) {
- /* just take the last pair in the oid list */
- if (oid[length - 2].label)
- strncpy(np->parent, oid[length - 2].label, MAXLABEL);
- strcpy(np->label, name);
- if (oid[length - 1].subid != -1)
- np->subid = oid[length - 1].subid;
- else
- print_error("Warning: This entry is pretty silly", np->label, type);
- } else {
- print_error("No end to oid", (char *) NULL, type);
- free_node(np);
- np = 0;
- }
- /* free oid array */
- for (count = 0; count < length; count++) {
- if (oid[count].label)
- free(oid[count].label);
- oid[count].label = 0;
- }
- return np;
-}
-
-/*
- * Parses a NOTIFICATION-TYPE macro.
- * Returns 0 on error.
- */
-static struct node *
-parse_notificationDefinition(fp, name)
- FILE *fp;
- char *name;
-{
- int type;
- char token[MAXTOKEN];
- int count, length;
- struct subid oid[32];
- struct node *np;
-
- np = (struct node *) Malloc(sizeof(struct node));
- np->type = 0;
- np->next = 0;
- np->enums = 0;
- np->description = NULL; /* default to an empty description */
- type = get_token(fp, token);
- while (type != EQUALS) {
- switch (type) {
- case DESCRIPTION:
- type = get_token(fp, token);
- if (type != QUOTESTRING) {
- print_error("Bad DESCRIPTION", token, type);
- free_node(np);
- return 0;
- }
-#ifdef TEST
- printf("Description== \"%.50s\"\n", quoted_string_buffer);
-#endif
- np->description = quoted_string_buffer;
- quoted_string_buffer = (char *) calloc(1, MAXQUOTESTR);
- break;
-
- default:
- /\10\0BÐ+= m\0\0
-È /* \0\0\0\0*/ B\10\04¨NMPT\10\ 1^h */c\0\0\0\0for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if (!orp)
- return;
- if (isp->requests == orp) {
- isp->requests = orp->next_request; /* unlink head */
- } else {
- for (rp = isp->requests; rp; rp = rp->next_request) {
- if (rp->next_request == orp) {
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL) {
- snmp_free_pdu(orp->pdu);
- }
- free((char *) orp);
-}
-
-#endif/***/ BUG_SNMPTRACE */cked for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if (!orp)
- return;
- if (isp->requests == orp) {
- isp->requests = orp->next_request; /* unlink head */
- } else {
- for (rp = isp->requests; rp; rp = rp->next_request) {
- if (rp->next_request == orp) {
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL) {
- snmp_free_pdu(orp->pdu);
- }
- free((char *) orp);
-}
- oid list */
- if (oid[length - 2].label)
- strncpy(np->parent, oid[length - 2].label, MAXLABEL);
- strcpy(np->label, name);
- if (oid[length - 1].subid != -1)
- np->subid = oid[length - 1].subid;
- else
- print_error("Warning: This entry is pretty silly", np->label, type);
- } else {
- print_error("No end to oid", (char *) NULL, type);
- free_node(np);
- np = 0;
- }
- /* free oid array */
- for (count = 0; count < length; count++) {
- if (oid[count].label)
- free(oid[count].label);
- oid[count].label = 0;
- }
- return np;
-}
-
-/*
- * Parses a NOTIFICATION-TYPE macro.
- * Returns 0 on error.
- */
-static struct node *
-parse_notificationDefinition(fp, name)
- FILE *fp;
- char *name;
-{
- int type;
- char token[MAXTOKEN];
- int count, length;
- struct subid oid[32];
- struct node *np;
-
- np = (struct node *) Malloc(sizeof(struct node));
- np->type = 0;
- np->next = 0;
- np->enums = 0;
- np->description = NULL; /* default to an empty description */
- type = get_token(fp, token);
- while (type != EQUALS) {
- switch (type) {
- case DESCRIPTION:
- type = get_token(fp, token);
- if (type != QUOTESTRING) {
- print_error("Bad DESCRIPTION", token, type);
- free_node(np);
- return 0;
- }
-#ifdef TEST
- printf("Description== \"%.50s\"\n", quoted_string_buffer);
-#endif
- np->description = quoted_string_buffer;
- quoted_string_buffer = (char *) calloc(1, MAXQUOTESTR);
- break;
-
- default:
- /\10\0BÐ+= m\0\0
-È /* \0\0\0\0*/ B\10\04¨NMPT\10\ 1^h */c\0\0\0\0for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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-È /* \0\0\0\0*/ B\10\04¨NMPT\10\ 1\97X */c\0\0\0\0for testing purposes */e key! replace...
- */
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while (rp) {
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *) orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session) { /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for (slp = Sessions; slp; slp = slp->next) {
- if (slp->session == session) {
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp) {
- if (slp->session->community != NULL)
- free((char *) slp->session->community);
- if (slp->session->peername != NULL)
- free((char *) slp->session->peername);
- free((char *) slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *) slp->internal);
- free((char *) slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for (vp = pdu->variables; vp; vp = vp->next_variable) {
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *) vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *) packet, (char *) cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG) {
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *) &pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *) &pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *) &pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *) pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char) IPADDRESS,
- (u_char *) & pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *) &pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *) &pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char) TIMETICKS,
- (long *) &pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *) buf, (char *) cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char) pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *) packet, (char *) cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build(packet, &length, session, is_agent, totallength);
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *) buf, (char *) cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if (session->qoS & USEC_QOS_AUTH)
- md5Digest(packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16));
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if (version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if (session->authenticator) {
- ret = session->authenticator(origdata, origlength, save_data - community_length,
- community_length, session, pdu);
- if (ret < 0)
- return ret;
- }
- if (pdu->command != TRP_REQ_MSG) {
- data = asn_parse_int(data, &length, &type, (long *) &pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *) &pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *) &pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *) calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *) objid, (char *) pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *) & pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *) &pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *) &pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *) &pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while ((int) length > 0) {
- if (pdu->variables == NULL) {
- pdu->variables = vp = (struct variable_list *) calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *) calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *) &length);
- if (data == NULL)
- return -1;
- op = (oid *) calloc(1, (unsigned) vp->name_length * sizeof(oid));
- bcopy((char *) objid, (char *) op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch ((short) vp->type) {
- case ASN_INTEGER:
- vp->val.integer = (long *) calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *) vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *) calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *) vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *) calloc(1, sizeof(struct counter64));
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *) vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *) calloc(1, (unsigned) vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *) calloc(1, (unsigned) vp->val_len);
- bcopy((char *) objid, (char *) vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for (slp = Sessions; slp; slp = slp->next) {
- if (slp->session == session) {
- isp = slp->internal;
- break;
- }
- }
-
- if (!pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (isp == NULL) {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG) {
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH) {
- pdu->enterprise = (oid *) calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *) DEFAULT_ENTERPRISE, (char *) pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE) / sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS) {
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS) {
- bcopy((char *) &isp->addr, (char *) &pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
- if (snmp_build(session, pdu, packet, &length, 0) < 0) {
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1/***/ if we found entry that points here */
- oslp e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *) &pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *) &pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *) pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char) IPADDRESS,
- (u_char *) & pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *) &pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *) &pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char) TIMETICKS,
- (long *) &pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *) buf, (char *) cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char) pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *) packet, (char *) cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build(packet, &length, session, is_agent, totallength);
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *) buf, (char *) cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if (session->qoS & USEC_QOS_AUTH)
- md5Digest(packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16));
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if (version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if (session->authenticator) {
- ret = session->authenticator(origdata, origlength, save_data - community_length,
- community_length, session, pdu);
- if (ret < 0)
- return ret;
- }
- if (pdu->command != TRP_REQ_MSG) {
- data = asn_parse_int(data, &length, &type, (long *) &pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *) &pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *) &pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *) calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *) objid, (char *) pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *) & pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *) &pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *) &pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *) &pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while ((int) length > 0) {
- if (pdu->variables == NULL) {
- pdu->variables = vp = (struct variable_list *) calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *) calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *) &length);
- if (data == NULL)
- return -1;
- op = (oid *) calloc(1, (unsigned) vp->name_length * sizeof(oid));
- bcopy((char *) objid, (char *) op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch ((short) vp->type) {
- case ASN_INTEGER:
- vp->val.integer = (long *) calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *) vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *) calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *) vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *) calloc(1, sizeof(struct counter64));
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *) vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *) calloc(1, (unsigned) vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *) calloc(1, (unsigned) vp->val_len);
- bcopy((char *) objid, (char *) vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for (slp = Sessions; slp; slp = slp->next) {
- if (slp->session == session) {
- isp = slp->internal;
- break;
- }
- }
-
- if (!pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (isp == NULL) {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG) {
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH) {
- pdu->enterprise = (oid *) calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *) DEFAULT_ENTERPRISE, (char *) pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE) / sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS) {
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS) {
- bcopy((char *) &isp->addr, (char *) &pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
- if (snmp_build(session, pdu, packet, &length, 0) < 0) {
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while (rp) {
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *) orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session) { /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for (slp = Sessions; slp; slp = slp->next) {
- if (slp->session == session) {
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp) {
- if (slp->session->community != NULL)
- free((char *) slp->session->community);
- if (slp->session->peername != NULL)
- free((char *) slp->session->peername);
- free((char *) slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *) slp->internal);
- free((char *) slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for (vp = pdu->variables; vp; vp = vp->next_variable) {
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *) vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *) packet, (char *) cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG) {
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *) &pdu->\10\0BÐ+= m\0\0
-È /* \10\0>X*/ B\10\04¨NMPT\10\ 1\98à */c\0\0\0\0for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet) {
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif/***/ if we found entry that points here */
- oslp e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet) {
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-MUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct\10\0BÐ+= m\0\0
-È /* \0\0\0\0*/ B\10\0>XNMPT\10\ 1Ê */c\0\0\0\0for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *) 0);
- if (sendto(isp->sd, (char *) packet, length, 0, (struct sockaddr *) &pdu->address, sizeof(pdu->address)) < 0) {
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG) {
- /* set up to expect a response */
- rp = (struct request_list *) calloc(1, sizeof(struct request_list));
-#if 1/***/ if we found entry that points here */
- oslp e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
-\10\0=p\7fÿ³3\7fÿ³B\7fÿ³S\7fÿ³]\7fÿ³i\0\0\0\18\7fÿ³\82\0\0\0\ 1\7fÿ³ \7fÿ³\7fÿ³º\7fÿ³Ê\7fÿ³×\0\0\0Á\7fÿ³ù\0\0\0\10\7fÿ´\10\10\0=ø\0%\0\19\0\15\0\0\10\0D(\0\0\0\10\7fÿ´_\10\0=à\0\0\ 2\\0\0\0\0\10\0BØ\0\0\0\10\7fÿ´©\10\0=\98\0\0\ 24\0\0\0\0\10\0BØ\0\0\0\10\7fÿ´ø\10\0=È\0\0\ 2H\0\0\0\0\10\0BØ\0\0\0\10\7fÿµB\10\0>\10\7fÿµ]\7fÿµm\7fÿµz\0\0\0\10\7fÿµ \10\0>(\7fÿµ·\7fÿµÉ\7fÿµÖ\0\0\0\10\7fÿµï\10\0>@\7fÿ¶\12\7fÿ¶ \7fÿ¶4\0\0\0\10\7fÿ¶P\0\0\0\ 1\7fÿ¶r\7fÿ¶~\7fÿ¶\88\0\0\00\7fÿ¶\9f\0\0\0\0\7fÿ¶·\0\0\0\0\7fÿ¶Ù\10\04¨\7fÿ·\ 1\0\0\0\0\7fÿ·#\7fÿ·/\7fÿ·>\10\0>X\7fÿ·V\0\0\03\0\0\0\0/usr/people/wessels/.indent.pro\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 4\ 1\0\0\0\0\7fÿ¯è\7fÿ¯ù\7fÿ°\f\7fÿ°\e\7fÿ°.\7fÿ°?\7fÿ°M\7fÿ°[\7fÿ°p\7fÿ°\85\7fÿ°\95\7fÿ°£\7fÿ°²\7fÿ°Å\7fÿ°Û\7fÿ°ñ\7fÿ±
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-\7fÿ³ \7fÿ³3\7fÿ³B\7fÿ³S\7fÿ³]\7fÿ³i\7fÿ³s\7fÿ³\82\7fÿ³\91\7fÿ³ \7fÿ³\7fÿ³º\7fÿ³Ê\7fÿ³×\7fÿ³ç\7fÿ³ù\7fÿ´\ 4\7fÿ´\10\7fÿ´\1e\7fÿ´)\7fÿ´3\7fÿ´C\7fÿ´O\7fÿ´_\7fÿ´k\7fÿ´t\7fÿ´\81\7fÿ´\8f\7fÿ´\9f\7fÿ´©\7fÿ´·\7fÿ´Å\7fÿ´Ò\7fÿ´Ý\7fÿ´í\7fÿ´ø\7fÿµ\ 3\7fÿµ\10\7fÿµ\1d\7fÿµ)\7fÿµ7\7fÿµB\7fÿµM\7fÿµ]\7fÿµm\7fÿµz\7fÿµ\89\7fÿµ \7fÿµ«\7fÿµ·\7fÿµÉ\7fÿµÖ\7fÿµâ\7fÿµï\7fÿ¶\ 3\7fÿ¶\12\7fÿ¶ \7fÿ¶4\7fÿ¶?\7fÿ¶P\7fÿ¶b\7fÿ¶r\7fÿ¶~\7fÿ¶\88\7fÿ¶\94\7fÿ¶\9f\7fÿ¶«\7fÿ¶·\7fÿ¶É\7fÿ¶Ù\7fÿ¶í\7fÿ·\ 1\7fÿ·\15\7fÿ·#\7fÿ·/\7fÿ·>\7fÿ·L\7fÿ·V\7fÿ·f\7fÿ·q\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0@ \0\0\0\0ables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *) 0);
- if (sendto(isp->sd, (char *) packet, length, 0, (struct sockaddr *) &pdu->address, sizeof(pdu->address)) < 0) {
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG) {
- /* set up to expect a response */
- rp = (struct request_list *) calloc(1, sizeof(struct request_list));
-ar *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->vari\10\0BÐ+= m\0\0
-È /* \10\04¨*/ B\0\0\0\0NMPT\10\ 1Ê */c\0\0\0\0for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if (!rp) {
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif/***/ if we found entry that points here */
- oslp e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if (!rp) {
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-ULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- cas\10\0BÐ+= m\0\0
-È /* \10\0>X*/ B\10\04¨NMPT\10\ 1Ë° */c\0\0\0\0for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu *pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (!pdu)
- return;
-
- vp = pdu->variables;
- while (vp) {
- if (vp->name) {
- free((char *) vp->name);
- }
- if (vp->val.string) {
- free((char *) vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *) ovp);
- }
- if (pdu->enterprise) {
- free((char *) pdu->enterprise);
- }
- free((char *) pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for (slp = Sessions; slp; slp = slp->next) {
- if (FD_ISSET(slp->internal->sd, fdset)) {
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *) packet, PACKET_LENGTH, 0, (struct sockaddr *) &from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1/***/ if we found entry that points here */
- oslp e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu *pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (!pdu)
- return;
-
- vp = pdu->variables;
- while (vp) {
- if (vp->name) {
- free((char *) vp->name);
- }
- if (vp->val.string) {
- free((char *) vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *) ovp);
- }
- if (pdu->enterprise) {
- free((char *) pdu->enterprise);
- }
- free((char *) pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for (slp = Sessions; slp; slp = slp->next) {
- if (FD_ISSET(slp->internal->sd, fdset)) {
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *) packet, PACKET_LENGTH, 0, (struct sockaddr *) &from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-ponse->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);\10\0BÐ+= m\0\0
-È /* \10\04¨*/ B\0\0\0\0NMPT\10\ 1Í8 */c\0\0\0\0for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu * pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (! pdu)
- return;
-
- vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
- }
- if (pdu->enterprise) {
- free((char *)pdu->enterprise);
- }
- free((char *)pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1 /***/
- if (snmp_dump_packet) {
- snmp_print_packet(packet, length, from, 0);
- }
- pdu = (struct snmp_pdu *) calloc(1, sizeof(struct snmp_pdu));
-
- if (!pdu) {
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
- }
-#endif/***/ if we found entry that points here */
- oslp e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu * pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (! pdu)
- return;
-
- vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
- }
- if (pdu->enterprise) {
- free((char *)pdu->enterprise);
- }
- free((char *)pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1 /***/
- if (snmp_dump_packet) {
- snmp_print_packet(packet, length, from, 0);
- }
- pdu = (struct snmp_pdu *) calloc(1, sizeof(struct snmp_pdu));
-
- if (!pdu) {
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
- }
- == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- \10\0BÐ+= m\0\0
-È /* \0\0\0\0*/ B\10\0>XNMPT\10\ 1Ôè */c\0\0\0\0for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu * pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (! pdu)
- return;
-
- vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
- }
- if (pdu->enterprise) {
- free((char *)pdu->enterprise);
- }
- free((char *)pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, from, 0);
- }
- pdu = (struct snmp_pdu *)calloc(1, sizeof(struct snmp_pdu));
-
- if(! pdu){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
- }
-#endif /***/
-
- pdu->address = from;
- pdu->reqid = 0;
- pdu->variables = NULL;
- pdu->enterprise = NULL;
- pdu->enterprise_length = 0;
- if (snmp_parse(sp, pdu, packet, length) < 0) {
- fprintf(stderr, "Mangled packet\n");
- snmp_free_pdu(pdu);
- return;
- }
- if (pdu->command == GET_RSP_MSG || pdu->command == REPORT_MSG) {
-#if 1 /***/ /* bug fix: illegal re-use of rp killed some requests */
- struct request_list *rp_next = 0;
- for (rp = isp->requests; rp; rp = rp_next) {
- rp_next = rp->next_request;
- if (rp->request_id == pdu->reqid) {
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_RECV);
-#endif
- if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1) {
- /* successful, so delete request */
- free_one_request(isp, rp);
- break; /* no more request with the same reqid */
- }
- }
- }
-#endif/***/ g fix: illegal re-use of rp killed some requests */ replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
-\10\0=p\7fÿ³3\7fÿ³B\7fÿ³S\7fÿ³]\7fÿ³i\0\0\0\18\7fÿ³\82\0\0\0\ 1\7fÿ³ \7fÿ³\7fÿ³º\7fÿ³Ê\7fÿ³×\0\0\0Á\7fÿ³ù\0\0\0\10\7fÿ´\10\10\0=ø\0%\0\19\0\15\0\0\10\0D(\0\0\0\10\7fÿ´_\10\0=à\0\0\ 2\\0\0\0\0\10\0BØ\0\0\0\10\7fÿ´©\10\0=\98\0\0\ 24\0\0\0\0\10\0BØ\0\0\0\10\7fÿ´ø\10\0=È\0\0\ 2H\0\0\0\0\10\0BØ\0\0\0\10\7fÿµB\10\0>\10\7fÿµ]\7fÿµm\7fÿµz\0\0\0\10\7fÿµ \10\0>(\7fÿµ·\7fÿµÉ\7fÿµÖ\0\0\0\10\7fÿµï\10\0>@\7fÿ¶\12\7fÿ¶ \7fÿ¶4\0\0\0\10\7fÿ¶P\0\0\0\ 1\7fÿ¶r\7fÿ¶~\7fÿ¶\88\0\0\00\7fÿ¶\9f\0\0\0\0\7fÿ¶·\0\0\0\0\7fÿ¶Ù\10\0\82à\7fÿ·\ 1\0\0\0\0\7fÿ·#\7fÿ·/\7fÿ·>\10\0>X\7fÿ·V\0\0\03\0\0\0\0/usr/people/wessels/.indent.pro\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 4\ 1\0\0\0\0\7fÿ¯è\7fÿ¯ù\7fÿ°\f\7fÿ°\e\7fÿ°.\7fÿ°?\7fÿ°M\7fÿ°[\7fÿ°p\7fÿ°\85\7fÿ°\95\7fÿ°£\7fÿ°²\7fÿ°Å\7fÿ°Û\7fÿ°ñ\7fÿ±
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- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu * pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (! pdu)
- return;
-
- vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
- }
- if (pdu->enterprise) {
- free((char *)pdu->enterprise);
- }
- free((char *)pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, from, 0);
- }
- pdu = (struct snmp_pdu *)calloc(1, sizeof(struct snmp_pdu));
-
- if(! pdu){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
- }
-#endif /***/
-
- pdu->address = from;
- pdu->reqid = 0;
- pdu->variables = NULL;
- pdu->enterprise = NULL;
- pdu->enterprise_length = 0;
- if (snmp_parse(sp, pdu, packet, length) < 0) {
- fprintf(stderr, "Mangled packet\n");
- snmp_free_pdu(pdu);
- return;
- }
- if (pdu->command == GET_RSP_MSG || pdu->command == REPORT_MSG) {
-#if 1 /***/ /* bug fix: illegal re-use of rp killed some requests */
- struct request_list *rp_next = 0;
- for (rp = isp->requests; rp; rp = rp_next) {
- rp_next = rp->next_request;
- if (rp->request_id == pdu->reqid) {
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_RECV);
-#endif
- if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1) {
- /* successful, so delete request */
- free_one_request(isp, rp);
- break; /* no more request with the same reqid */
- }
- }
- }
->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)\10\0BÐ+= m\0\0
-È /* \10\0>X*/ B\10\07\0NMPT\10\ 1Ôè */c\0\0\0\0for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu * pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (! pdu)
- return;
-
- vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
- }
- if (pdu->enterprise) {
- free((char *)pdu->enterprise);
- }
- free((char *)pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, from, 0);
- }
- pdu = (struct snmp_pdu *)calloc(1, sizeof(struct snmp_pdu));
-
- if(! pdu){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
- }
-#endif /***/
-
- pdu->address = from;
- pdu->reqid = 0;
- pdu->variables = NULL;
- pdu->enterprise = NULL;
- pdu->enterprise_length = 0;
- if (snmp_parse(sp, pdu, packet, length) < 0){
- fprintf(stderr, "Mangled packet\n");
- snmp_free_pdu(pdu);
- return;
- }
-
- if (pdu->command == GET_RSP_MSG || pdu->command == REPORT_MSG){
-#if 1 /***/ /* bug fix: illegal re-use of rp killed some requests */
- struct request_list *rp_next= 0;
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (rp->request_id == pdu->reqid){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_RECV);
-#endif
- if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1){
- /* successful, so delete request */
- free_one_request(isp, rp);
- break; /* no more request with the same reqid */
- }
- }
- }
-#endif /***/
- } else if (pdu->command == GET_REQ_MSG
- || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG
- || pdu->command == TRP_REQ_MSG || pdu->command == SET_REQ_MSG) {
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, NULL, TRACE_RECV);
-#endif
- sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic);
- }
- snmp_free_pdu(pdu);
- }
- }
-}
-
-/*
- * Returns info about what snmp requires from a select statement.
- * numfds is the number of fds in the list that are significant.
- * All file descriptors opened for SNMP are OR'd into the fdset.
- * If activity occurs on any of these file descriptors, snmp_read
- * should be called with that file descriptor set
- *
- * The timeout is the latest time that SNMP can wait for a timeout. The
- * select should be done with the minimum time between timeout and any other
- * timeouts necessary. This should be checked upon each invocation of select.
- * If a timeout is received, snmp_timeout should be called to check if the
- * timeout was for SNMP. (snmp_timeout is idempotent)
- *
- * Block is 1 if the select is requested to block indefinitely, rather
- * than time out. If block is input as 1, the timeout value will be
- * treated as undefined, but it must be available for setting in
- * snmp_select_info. On return, if block is true, the value of
- * timeout will be undefined.
- *
- * snmp_select_info returns the number of open sockets. (i.e. The
- * number of sessions open)
- */
-int
-snmp_select_info(numfds, fdset, timeout, block)
- int *numfds;
- fd_set *fdset;
- struct timeval *timeout;
- int *block; /* should the select block until input arrives (i.e. no input) */
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- struct request_list *rp;
- struct timeval now, earliest;
- int active = 0, requests = 0;
-
- timerclear(&earliest);
- /*
- * For each request outstanding, add it's socket to the fdset,
- * and if it is the earliest timeout to expire, mark it as lowest.
- */
- for (slp = Sessions; slp; slp = slp->next) {
- active++;
- isp = slp->internal;
- if ((isp->sd + 1) > *numfds)
- *numfds = (isp->sd + 1);
- FD_SET(isp->sd, fdset);
- if (isp->requests) {
- /* found another session with outstanding requests */
- requests++;
- for (rp = isp->requests; rp; rp = rp->next_request) {
- if (!timerisset(&earliest) || timercmp(&rp->expire, &earliest, <))
- earliest = rp->expire;
- }
- }
- }
- if (requests == 0) /* if none are active, skip arithmetic */
- return active;
-
- /*
- * Now find out how much time until the earliest timeout. This
- * transforms earliest from an absolute time into a delta time, the
- * time left until the select should timeout.
- */
- gettimeofday(&now, (struct timezone *) 0);
- earliest.tv_sec--; /* adjust time to make arithmetic easier */
- earliest.tv_usec += 1000000L;
- earliest.tv_sec -= now.tv_sec;
- earliest.tv_usec -= now.tv_usec;
- while (earliest.tv_usec >= 1000000L) {
- earliest.tv_usec -= 1000000L;
- earliest.tv_sec += 1;
- }
- if (earliest.tv_sec < 0) {
- earliest.tv_sec = 0;
- earliest.tv_usec = 0;
- }
- /* if it was blocking before or our delta time is less, reset timeout */
- if (*block == 1 || timercmp(&earliest, timeout, <)) {
- *timeout = earliest;
- *block = 0;
- }
- return active;
-}
-
-/*
- * snmp_timeout should be called whenever the timeout from
- * snmp_select_info expires, but it is idempotent, so snmp_timeout can
- * be polled (probably a cpu expensive proposition). snmp_timeout
- * checks to see if any of the sessions have an outstanding request
- * that has timed out. If it finds one (or more), and that pdu has
- * more retries available, a new packet is formed from the pdu and is
- * resent. If there are no more retries available, the callback for
- * the session is used to alert the user of the timeout.
- */
-void
-snmp_timeout()
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
-#if 1 /***/ /* replacing freeme by simpler and safer rp_next */
- struct request_list *rp, *rp_next = 0;
-#endif/***/ placing freeme by simpler and safer rp_next*/n s */ replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu * pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (! pdu)
- return;
-
- vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
- }
- if (pdu->enterprise) {
- free((char *)pdu->enterprise);
- }
- free((char *)pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, from, 0);
- }
- pdu = (struct snmp_pdu *)calloc(1, sizeof(struct snmp_pdu));
-
- if(! pdu){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
- }
-#endif /***/
-
- pdu->address = from;
- pdu->reqid = 0;
- pdu->variables = NULL;
- pdu->enterprise = NULL;
- pdu->enterprise_length = 0;
- if (snmp_parse(sp, pdu, packet, length) < 0){
- fprintf(stderr, "Mangled packet\n");
- snmp_free_pdu(pdu);
- return;
- }
-
- if (pdu->command == GET_RSP_MSG || pdu->command == REPORT_MSG){
-#if 1 /***/ /* bug fix: illegal re-use of rp killed some requests */
- struct request_list *rp_next= 0;
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (rp->request_id == pdu->reqid){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_RECV);
-#endif
- if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1){
- /* successful, so delete request */
- free_one_request(isp, rp);
- break; /* no more request with the same reqid */
- }
- }
- }
-#endif /***/
- } else if (pdu->command == GET_REQ_MSG
- || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG
- || pdu->command == TRP_REQ_MSG || pdu->command == SET_REQ_MSG) {
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, NULL, TRACE_RECV);
-#endif
- sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic);
- }
- snmp_free_pdu(pdu);
- }
- }
-}
-
-/*
- * Returns info about what snmp requires from a select statement.
- * numfds is the number of fds in the list that are significant.
- * All file descriptors opened for SNMP are OR'd into the fdset.
- * If activity occurs on any of these file descriptors, snmp_read
- * should be called with that file descriptor set
- *
- * The timeout is the latest time that SNMP can wait for a timeout. The
- * select should be done with the minimum time between timeout and any other
- * timeouts necessary. This should be checked upon each invocation of select.
- * If a timeout is received, snmp_timeout should be called to check if the
- * timeout was for SNMP. (snmp_timeout is idempotent)
- *
- * Block is 1 if the select is requested to block indefinitely, rather
- * than time out. If block is input as 1, the timeout value will be
- * treated as undefined, but it must be available for setting in
- * snmp_select_info. On return, if block is true, the value of
- * timeout will be undefined.
- *
- * snmp_select_info returns the number of open sockets. (i.e. The
- * number of sessions open)
- */
-int
-snmp_select_info(numfds, fdset, timeout, block)
- int *numfds;
- fd_set *fdset;
- struct timeval *timeout;
- int *block; /* should the select block until input arrives (i.e. no input) */
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- struct request_list *rp;
- struct timeval now, earliest;
- int active = 0, requests = 0;
-
- timerclear(&earliest);
- /*
- * For each request outstanding, add it's socket to the fdset,
- * and if it is the earliest timeout to expire, mark it as lowest.
- */
- for (slp = Sessions; slp; slp = slp->next) {
- active++;
- isp = slp->internal;
- if ((isp->sd + 1) > *numfds)
- *numfds = (isp->sd + 1);
- FD_SET(isp->sd, fdset);
- if (isp->requests) {
- /* found another session with outstanding requests */
- requests++;
- for (rp = isp->requests; rp; rp = rp->next_request) {
- if (!timerisset(&earliest) || timercmp(&rp->expire, &earliest, <))
- earliest = rp->expire;
- }
- }
- }
- if (requests == 0) /* if none are active, skip arithmetic */
- return active;
-
- /*
- * Now find out how much time until the earliest timeout. This
- * transforms earliest from an absolute time into a delta time, the
- * time left until the select should timeout.
- */
- gettimeofday(&now, (struct timezone *) 0);
- earliest.tv_sec--; /* adjust time to make arithmetic easier */
- earliest.tv_usec += 1000000L;
- earliest.tv_sec -= now.tv_sec;
- earliest.tv_usec -= now.tv_usec;
- while (earliest.tv_usec >= 1000000L) {
- earliest.tv_usec -= 1000000L;
- earliest.tv_sec += 1;
- }
- if (earliest.tv_sec < 0) {
- earliest.tv_sec = 0;
- earliest.tv_usec = 0;
- }
- /* if it was blocking before or our delta time is less, reset timeout */
- if (*block == 1 || timercmp(&earliest, timeout, <)) {
- *timeout = earliest;
- *block = 0;
- }
- return active;
-}
-
-/*
- * snmp_timeout should be called whenever the timeout from
- * snmp_select_info expires, but it is idempotent, so snmp_timeout can
- * be polled (probably a cpu expensive proposition). snmp_timeout
- * checks to see if any of the sessions have an outstanding request
- * that has timed out. If it finds one (or more), and that pdu has
- * more retries available, a new packet is formed from the pdu and is
- * resent. If there are no more retries available, the callback for
- * the session is used to alert the user of the timeout.
- */
-void
-snmp_timeout()
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
-#if 1 /***/ /* replacing freeme by simpler and safer rp_next */
- struct request_list *rp, *rp_next = 0;
- */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless\10\0BÐ+= m\0\0
-È /* \10\00¸*/ B\0\0\0\0NMPT\10\ 1Ù\88 */c\0\0\0\0for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu * pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (! pdu)
- return;
-
- vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
- }
- if (pdu->enterprise) {
- free((char *)pdu->enterprise);
- }
- free((char *)pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, from, 0);
- }
- pdu = (struct snmp_pdu *)calloc(1, sizeof(struct snmp_pdu));
-
- if(! pdu){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
- }
-#endif /***/
-
- pdu->address = from;
- pdu->reqid = 0;
- pdu->variables = NULL;
- pdu->enterprise = NULL;
- pdu->enterprise_length = 0;
- if (snmp_parse(sp, pdu, packet, length) < 0){
- fprintf(stderr, "Mangled packet\n");
- snmp_free_pdu(pdu);
- return;
- }
-
- if (pdu->command == GET_RSP_MSG || pdu->command == REPORT_MSG){
-#if 1 /***/ /* bug fix: illegal re-use of rp killed some requests */
- struct request_list *rp_next= 0;
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (rp->request_id == pdu->reqid){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_RECV);
-#endif
- if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1){
- /* successful, so delete request */
- free_one_request(isp, rp);
- break; /* no more request with the same reqid */
- }
- }
- }
-#endif /***/
- } else if (pdu->command == GET_REQ_MSG
- || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG
- || pdu->command == TRP_REQ_MSG || pdu->command == SET_REQ_MSG){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, NULL, TRACE_RECV);
-#endif
- sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic);
- }
- snmp_free_pdu(pdu);
- }
- }
-}
-
-/*
- * Returns info about what snmp requires from a select statement.
- * numfds is the number of fds in the list that are significant.
- * All file descriptors opened for SNMP are OR'd into the fdset.
- * If activity occurs on any of these file descriptors, snmp_read
- * should be called with that file descriptor set
- *
- * The timeout is the latest time that SNMP can wait for a timeout. The
- * select should be done with the minimum time between timeout and any other
- * timeouts necessary. This should be checked upon each invocation of select.
- * If a timeout is received, snmp_timeout should be called to check if the
- * timeout was for SNMP. (snmp_timeout is idempotent)
- *
- * Block is 1 if the select is requested to block indefinitely, rather
- * than time out. If block is input as 1, the timeout value will be
- * treated as undefined, but it must be available for setting in
- * snmp_select_info. On return, if block is true, the value of
- * timeout will be undefined.
- *
- * snmp_select_info returns the number of open sockets. (i.e. The
- * number of sessions open)
- */
-int
-snmp_select_info(numfds, fdset, timeout, block)
- int *numfds;
- fd_set *fdset;
- struct timeval *timeout;
- int *block; /* should the select block until input arrives (i.e. no input) */
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- struct request_list *rp;
- struct timeval now, earliest;
- int active = 0, requests = 0;
-
- timerclear(&earliest);
- /*
- * For each request outstanding, add it's socket to the fdset,
- * and if it is the earliest timeout to expire, mark it as lowest.
- */
- for(slp = Sessions; slp; slp = slp->next){
- active++;
- isp = slp->internal;
- if ((isp->sd + 1) > *numfds)
- *numfds = (isp->sd + 1);
- FD_SET(isp->sd, fdset);
- if (isp->requests){
- /* found another session with outstanding requests */
- requests++;
- for(rp = isp->requests; rp; rp = rp->next_request){
- if (!timerisset(&earliest) || timercmp(&rp->expire, &earliest, <))
- earliest = rp->expire;
- }
- }
- }
- if (requests == 0) /* if none are active, skip arithmetic */
- return active;
-
- /*
- * Now find out how much time until the earliest timeout. This
- * transforms earliest from an absolute time into a delta time, the
- * time left until the select should timeout.
- */
- gettimeofday(&now, (struct timezone *)0);
- earliest.tv_sec--; /* adjust time to make arithmetic easier */
- earliest.tv_usec += 1000000L;
- earliest.tv_sec -= now.tv_sec;
- earliest.tv_usec -= now.tv_usec;
- while (earliest.tv_usec >= 1000000L){
- earliest.tv_usec -= 1000000L;
- earliest.tv_sec += 1;
- }
- if (earliest.tv_sec < 0){
- earliest.tv_sec = 0;
- earliest.tv_usec = 0;
- }
-
- /* if it was blocking before or our delta time is less, reset timeout */
- if (*block == 1 || timercmp(&earliest, timeout, <)){
- *timeout = earliest;
- *block = 0;
- }
- return active;
-}
-
-/*
- * snmp_timeout should be called whenever the timeout from
- * snmp_select_info expires, but it is idempotent, so snmp_timeout can
- * be polled (probably a cpu expensive proposition). snmp_timeout
- * checks to see if any of the sessions have an outstanding request
- * that has timed out. If it finds one (or more), and that pdu has
- * more retries available, a new packet is formed from the pdu and is
- * resent. If there are no more retries available, the callback for
- * the session is used to alert the user of the timeout.
- */
-void
-snmp_timeout()
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
-#if 1 /***/ /* replacing freeme by simpler and safer rp_next*/
- struct request_list *rp, *rp_next = 0;
-#endif /***/
- struct timeval now;
-
- gettimeofday(&now, (struct timezone *) 0);
- /*
- * For each request outstanding, check to see if it has expired.
- */
- for (slp = Sessions; slp; slp = slp->next) {
- sp = slp->session;
- isp = slp->internal;
-#if 1 /***/ /* simplification */
- for (rp = isp->requests; rp; rp = rp_next) {
- rp_next = rp->next_request;
- if (timercmp(&rp->expire, &now, <)) {
- /* this timer has expired */
- if (rp->retries >= sp->retries) {
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_TIMEOUT);
-#endif
- /* No more chances, delete this entry */
- sp->callback(TIMED_OUT, sp, rp->pdu->reqid, rp->pdu, sp->callback_magic);
- free_one_request(isp, rp);
- continue;
-#endif/***/ mplification */by simpler and safer rp_next*/n s */ replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu * pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (! pdu)
- return;
-
- vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
- }
- if (pdu->enterprise) {
- free((char *)pdu->enterprise);
- }
- free((char *)pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, from, 0);
- }
- pdu = (struct snmp_pdu *)calloc(1, sizeof(struct snmp_pdu));
-
- if(! pdu){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
- }
-#endif /***/
-
- pdu->address = from;
- pdu->reqid = 0;
- pdu->variables = NULL;
- pdu->enterprise = NULL;
- pdu->enterprise_length = 0;
- if (snmp_parse(sp, pdu, packet, length) < 0){
- fprintf(stderr, "Mangled packet\n");
- snmp_free_pdu(pdu);
- return;
- }
-
- if (pdu->command == GET_RSP_MSG || pdu->command == REPORT_MSG){
-#if 1 /***/ /* bug fix: illegal re-use of rp killed some requests */
- struct request_list *rp_next= 0;
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (rp->request_id == pdu->reqid){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_RECV);
-#endif
- if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1){
- /* successful, so delete request */
- free_one_request(isp, rp);
- break; /* no more request with the same reqid */
- }
- }
- }
-#endif /***/
- } else if (pdu->command == GET_REQ_MSG
- || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG
- || pdu->command == TRP_REQ_MSG || pdu->command == SET_REQ_MSG){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, NULL, TRACE_RECV);
-#endif
- sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic);
- }
- snmp_free_pdu(pdu);
- }
- }
-}
-
-/*
- * Returns info about what snmp requires from a select statement.
- * numfds is the number of fds in the list that are significant.
- * All file descriptors opened for SNMP are OR'd into the fdset.
- * If activity occurs on any of these file descriptors, snmp_read
- * should be called with that file descriptor set
- *
- * The timeout is the latest time that SNMP can wait for a timeout. The
- * select should be done with the minimum time between timeout and any other
- * timeouts necessary. This should be checked upon each invocation of select.
- * If a timeout is received, snmp_timeout should be called to check if the
- * timeout was for SNMP. (snmp_timeout is idempotent)
- *
- * Block is 1 if the select is requested to block indefinitely, rather
- * than time out. If block is input as 1, the timeout value will be
- * treated as undefined, but it must be available for setting in
- * snmp_select_info. On return, if block is true, the value of
- * timeout will be undefined.
- *
- * snmp_select_info returns the number of open sockets. (i.e. The
- * number of sessions open)
- */
-int
-snmp_select_info(numfds, fdset, timeout, block)
- int *numfds;
- fd_set *fdset;
- struct timeval *timeout;
- int *block; /* should the select block until input arrives (i.e. no input) */
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- struct request_list *rp;
- struct timeval now, earliest;
- int active = 0, requests = 0;
-
- timerclear(&earliest);
- /*
- * For each request outstanding, add it's socket to the fdset,
- * and if it is the earliest timeout to expire, mark it as lowest.
- */
- for(slp = Sessions; slp; slp = slp->next){
- active++;
- isp = slp->internal;
- if ((isp->sd + 1) > *numfds)
- *numfds = (isp->sd + 1);
- FD_SET(isp->sd, fdset);
- if (isp->requests){
- /* found another session with outstanding requests */
- requests++;
- for(rp = isp->requests; rp; rp = rp->next_request){
- if (!timerisset(&earliest) || timercmp(&rp->expire, &earliest, <))
- earliest = rp->expire;
- }
- }
- }
- if (requests == 0) /* if none are active, skip arithmetic */
- return active;
-
- /*
- * Now find out how much time until the earliest timeout. This
- * transforms earliest from an absolute time into a delta time, the
- * time left until the select should timeout.
- */
- gettimeofday(&now, (struct timezone *)0);
- earliest.tv_sec--; /* adjust time to make arithmetic easier */
- earliest.tv_usec += 1000000L;
- earliest.tv_sec -= now.tv_sec;
- earliest.tv_usec -= now.tv_usec;
- while (earliest.tv_usec >= 1000000L){
- earliest.tv_usec -= 1000000L;
- earliest.tv_sec += 1;
- }
- if (earliest.tv_sec < 0){
- earliest.tv_sec = 0;
- earliest.tv_usec = 0;
- }
-
- /* if it was blocking before or our delta time is less, reset timeout */
- if (*block == 1 || timercmp(&earliest, timeout, <)){
- *timeout = earliest;
- *block = 0;
- }
- return active;
-}
-
-/*
- * snmp_timeout should be called whenever the timeout from
- * snmp_select_info expires, but it is idempotent, so snmp_timeout can
- * be polled (probably a cpu expensive proposition). snmp_timeout
- * checks to see if any of the sessions have an outstanding request
- * that has timed out. If it finds one (or more), and that pdu has
- * more retries available, a new packet is formed from the pdu and is
- * resent. If there are no more retries available, the callback for
- * the session is used to alert the user of the timeout.
- */
-void
-snmp_timeout()
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
-#if 1 /***/ /* replacing freeme by simpler and safer rp_next*/
- struct request_list *rp, *rp_next = 0;
-#endif /***/
- struct timeval now;
-
- gettimeofday(&now, (struct timezone *) 0);
- /*
- * For each request outstanding, check to see if it has expired.
- */
- for (slp = Sessions; slp; slp = slp->next) {
- sp = slp->session;
- isp = slp->internal;
-#if 1 /***/ /* simplification */
- for (rp = isp->requests; rp; rp = rp_next) {
- rp_next = rp->next_request;
- if (timercmp(&rp->expire, &now, <)) {
- /* this timer has expired */
- if (rp->retries >= sp->retries) {
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_TIMEOUT);
-#endif
- /* No more chances, delete this entry */
- sp->callback(TIMED_OUT, sp, rp->pdu->reqid, rp->pdu, sp->callback_magic);
- free_one_request(isp, rp);
- continue;
-r *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, lengt\10\0BÐ+= m\0\0
-È /* \10\0>X*/ B\10\03\10NMPT\10\ 1èè */c\0\0\0\0for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu * pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (! pdu)
- return;
-
- vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
- }
- if (pdu->enterprise) {
- free((char *)pdu->enterprise);
- }
- free((char *)pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, from, 0);
- }
- pdu = (struct snmp_pdu *)calloc(1, sizeof(struct snmp_pdu));
-
- if(! pdu){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
- }
-#endif /***/
-
- pdu->address = from;
- pdu->reqid = 0;
- pdu->variables = NULL;
- pdu->enterprise = NULL;
- pdu->enterprise_length = 0;
- if (snmp_parse(sp, pdu, packet, length) < 0){
- fprintf(stderr, "Mangled packet\n");
- snmp_free_pdu(pdu);
- return;
- }
-
- if (pdu->command == GET_RSP_MSG || pdu->command == REPORT_MSG){
-#if 1 /***/ /* bug fix: illegal re-use of rp killed some requests */
- struct request_list *rp_next= 0;
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (rp->request_id == pdu->reqid){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_RECV);
-#endif
- if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1){
- /* successful, so delete request */
- free_one_request(isp, rp);
- break; /* no more request with the same reqid */
- }
- }
- }
-#endif /***/
- } else if (pdu->command == GET_REQ_MSG
- || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG
- || pdu->command == TRP_REQ_MSG || pdu->command == SET_REQ_MSG){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, NULL, TRACE_RECV);
-#endif
- sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic);
- }
- snmp_free_pdu(pdu);
- }
- }
-}
-
-/*
- * Returns info about what snmp requires from a select statement.
- * numfds is the number of fds in the list that are significant.
- * All file descriptors opened for SNMP are OR'd into the fdset.
- * If activity occurs on any of these file descriptors, snmp_read
- * should be called with that file descriptor set
- *
- * The timeout is the latest time that SNMP can wait for a timeout. The
- * select should be done with the minimum time between timeout and any other
- * timeouts necessary. This should be checked upon each invocation of select.
- * If a timeout is received, snmp_timeout should be called to check if the
- * timeout was for SNMP. (snmp_timeout is idempotent)
- *
- * Block is 1 if the select is requested to block indefinitely, rather
- * than time out. If block is input as 1, the timeout value will be
- * treated as undefined, but it must be available for setting in
- * snmp_select_info. On return, if block is true, the value of
- * timeout will be undefined.
- *
- * snmp_select_info returns the number of open sockets. (i.e. The
- * number of sessions open)
- */
-int
-snmp_select_info(numfds, fdset, timeout, block)
- int *numfds;
- fd_set *fdset;
- struct timeval *timeout;
- int *block; /* should the select block until input arrives (i.e. no input) */
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- struct request_list *rp;
- struct timeval now, earliest;
- int active = 0, requests = 0;
-
- timerclear(&earliest);
- /*
- * For each request outstanding, add it's socket to the fdset,
- * and if it is the earliest timeout to expire, mark it as lowest.
- */
- for(slp = Sessions; slp; slp = slp->next){
- active++;
- isp = slp->internal;
- if ((isp->sd + 1) > *numfds)
- *numfds = (isp->sd + 1);
- FD_SET(isp->sd, fdset);
- if (isp->requests){
- /* found another session with outstanding requests */
- requests++;
- for(rp = isp->requests; rp; rp = rp->next_request){
- if (!timerisset(&earliest) || timercmp(&rp->expire, &earliest, <))
- earliest = rp->expire;
- }
- }
- }
- if (requests == 0) /* if none are active, skip arithmetic */
- return active;
-
- /*
- * Now find out how much time until the earliest timeout. This
- * transforms earliest from an absolute time into a delta time, the
- * time left until the select should timeout.
- */
- gettimeofday(&now, (struct timezone *)0);
- earliest.tv_sec--; /* adjust time to make arithmetic easier */
- earliest.tv_usec += 1000000L;
- earliest.tv_sec -= now.tv_sec;
- earliest.tv_usec -= now.tv_usec;
- while (earliest.tv_usec >= 1000000L){
- earliest.tv_usec -= 1000000L;
- earliest.tv_sec += 1;
- }
- if (earliest.tv_sec < 0){
- earliest.tv_sec = 0;
- earliest.tv_usec = 0;
- }
-
- /* if it was blocking before or our delta time is less, reset timeout */
- if (*block == 1 || timercmp(&earliest, timeout, <)){
- *timeout = earliest;
- *block = 0;
- }
- return active;
-}
-
-/*
- * snmp_timeout should be called whenever the timeout from
- * snmp_select_info expires, but it is idempotent, so snmp_timeout can
- * be polled (probably a cpu expensive proposition). snmp_timeout
- * checks to see if any of the sessions have an outstanding request
- * that has timed out. If it finds one (or more), and that pdu has
- * more retries available, a new packet is formed from the pdu and is
- * resent. If there are no more retries available, the callback for
- * the session is used to alert the user of the timeout.
- */
-void
-snmp_timeout()
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
-#if 1 /***/ /* replacing freeme by simpler and safer rp_next*/
- struct request_list *rp, *rp_next = 0;
-#endif /***/
- struct timeval now;
-
- gettimeofday(&now, (struct timezone *)0);
- /*
- * For each request outstanding, check to see if it has expired.
- */
- for(slp = Sessions; slp; slp = slp->next){
- sp = slp->session;
- isp = slp->internal;
-#if 1 /***/ /* simplification */
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (timercmp(&rp->expire, &now, <)){
- /* this timer has expired */
- if (rp->retries >= sp->retries){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_TIMEOUT);
-#endif
- /* No more chances, delete this entry */
- sp->callback(TIMED_OUT, sp, rp->pdu->reqid, rp->pdu, sp->callback_magic);
- free_one_request(isp, rp);
- continue;
-#endif /***/
- } else {
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct timeval tv;
-
- /* retransmit this pdu */
- rp->retries++;
- rp->timeout <<= 1;
- if (snmp_build(sp, rp->pdu, packet, &length, 0) < 0) {
- fprintf(stderr, "Error building packet\n");
- }
-#if 1/***/ mplification */by simpler and safer rp_next*/n s */ replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
-\10\0=p\7fÿ³3\7fÿ³B\7fÿ³S\7fÿ³]\7fÿ³i\0\0\0\18\7fÿ³\82\0\0\0\ 1\7fÿ³ \7fÿ³\7fÿ³º\7fÿ³Ê\7fÿ³×\0\0\0Á\7fÿ³ù\0\0\0\10\7fÿ´\10\10\0=ø\0%\0\19\0\15\0\0\10\0D(\0\0\0\10\7fÿ´_\10\0=à\0\0\ 2\\0\0\0\0\10\0BØ\0\0\0\10\7fÿ´©\10\0=\98\0\0\ 24\0\0\0\0\10\0BØ\0\0\0\10\7fÿ´ø\10\0=È\0\0\ 2H\0\0\0\0\10\0BØ\0\0\0\10\7fÿµB\10\0>\10\7fÿµ]\7fÿµm\7fÿµz\0\0\0\10\7fÿµ \10\0>(\7fÿµ·\7fÿµÉ\7fÿµÖ\0\0\0\10\7fÿµï\10\0>@\7fÿ¶\12\7fÿ¶ \7fÿ¶4\0\0\0\10\7fÿ¶P\0\0\0\ 1\7fÿ¶r\7fÿ¶~\7fÿ¶\88\0\0\00\7fÿ¶\9f\0\0\0\0\7fÿ¶·\0\0\0\0\7fÿ¶Ù\10\0\82à\7fÿ·\ 1\0\0\0\0\7fÿ·#\7fÿ·/\7fÿ·>\10\0>X\7fÿ·V\0\0\03\0\0\0\0/usr/people/wessels/.indent.pro\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 4\ 1\0\0\0\0\7fÿ¯è\7fÿ¯ù\7fÿ°\f\7fÿ°\e\7fÿ°.\7fÿ°?\7fÿ°M\7fÿ°[\7fÿ°p\7fÿ°\85\7fÿ°\95\7fÿ°£\7fÿ°²\7fÿ°Å\7fÿ°Û\7fÿ°ñ\7fÿ±
-\7fÿ±\1e\7fÿ±2\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\7fÿ±\99\7fÿ±«\7fÿ±º\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\7fÿ²\ f\7fÿ²\1d\7fÿ²2\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\7fÿ²\7f\7fÿ²\8a\7fÿ²\99\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\7fÿ²ö\7fÿ³
-\7fÿ³ \7fÿ³3\7fÿ³B\7fÿ³S\7fÿ³]\7fÿ³i\7fÿ³s\7fÿ³\82\7fÿ³\91\7fÿ³ \7fÿ³\7fÿ³º\7fÿ³Ê\7fÿ³×\7fÿ³ç\7fÿ³ù\7fÿ´\ 4\7fÿ´\10\7fÿ´\1e\7fÿ´)\7fÿ´3\7fÿ´C\7fÿ´O\7fÿ´_\7fÿ´k\7fÿ´t\7fÿ´\81\7fÿ´\8f\7fÿ´\9f\7fÿ´©\7fÿ´·\7fÿ´Å\7fÿ´Ò\7fÿ´Ý\7fÿ´í\7fÿ´ø\7fÿµ\ 3\7fÿµ\10\7fÿµ\1d\7fÿµ)\7fÿµ7\7fÿµB\7fÿµM\7fÿµ]\7fÿµm\7fÿµz\7fÿµ\89\7fÿµ \7fÿµ«\7fÿµ·\7fÿµÉ\7fÿµÖ\7fÿµâ\7fÿµï\7fÿ¶\ 3\7fÿ¶\12\7fÿ¶ \7fÿ¶4\7fÿ¶?\7fÿ¶P\7fÿ¶b\7fÿ¶r\7fÿ¶~\7fÿ¶\88\7fÿ¶\94\7fÿ¶\9f\7fÿ¶«\7fÿ¶·\7fÿ¶É\7fÿ¶Ù\7fÿ¶í\7fÿ·\ 1\7fÿ·\15\7fÿ·#\7fÿ·/\7fÿ·>\7fÿ·L\7fÿ·V\7fÿ·f\7fÿ·q\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0@ \0\0\0\0;
- }
-
- if (pdu->command == GET_RSP_MSG || pdu->command == REPORT_MSG){
-#if 1 /***/ /* bug fix: illegal re-use of rp killed some requests */
- struct request_list *rp_next= 0;
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (rp->request_id == pdu->reqid){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_RECV);
-#endif
- if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1){
- /* successful, so delete request */
- free_one_request(isp, rp);
- break; /* no more request with the same reqid */
- }
- }
- }
-#endif /***/
- } else if (pdu->command == GET_REQ_MSG
- || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG
- || pdu->command == TRP_REQ_MSG || pdu->command == SET_REQ_MSG){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, NULL, TRACE_RECV);
-#endif
- sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic);
- }
- snmp_free_pdu(pdu);
- }
- }
-}
-
-/*
- * Returns info about what snmp requires from a select statement.
- * numfds is the number of fds in the list that are significant.
- * All file descriptors opened for SNMP are OR'd into the fdset.
- * If activity occurs on any of these file descriptors, snmp_read
- * should be called with that file descriptor set
- *
- * The timeout is the latest time that SNMP can wait for a timeout. The
- * select should be done with the minimum time between timeout and any other
- * timeouts necessary. This should be checked upon each invocation of select.
- * If a timeout is received, snmp_timeout should be called to check if the
- * timeout was for SNMP. (snmp_timeout is idempotent)
- *
- * Block is 1 if the select is requested to block indefinitely, rather
- * than time out. If block is input as 1, the timeout value will be
- * treated as undefined, but it must be available for setting in
- * snmp_select_info. On return, if block is true, the value of
- * timeout will be undefined.
- *
- * snmp_select_info returns the number of open sockets. (i.e. The
- * number of sessions open)
- */
-int
-snmp_select_info(numfds, fdset, timeout, block)
- int *numfds;
- fd_set *fdset;
- struct timeval *timeout;
- int *block; /* should the select block until input arrives (i.e. no input) */
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- struct request_list *rp;
- struct timeval now, earliest;
- int active = 0, requests = 0;
-
- timerclear(&earliest);
- /*
- * For each request outstanding, add it's socket to the fdset,
- * and if it is the earliest timeout to expire, mark it as lowest.
- */
- for(slp = Sessions; slp; slp = slp->next){
- active++;
- isp = slp->internal;
- if ((isp->sd + 1) > *numfds)
- *numfds = (isp->sd + 1);
- FD_SET(isp->sd, fdset);
- if (isp->requests){
- /* found another session with outstanding requests */
- requests++;
- for(rp = isp->requests; rp; rp = rp->next_request){
- if (!timerisset(&earliest) || timercmp(&rp->expire, &earliest, <))
- earliest = rp->expire;
- }
- }
- }
- if (requests == 0) /* if none are active, skip arithmetic */
- return active;
-
- /*
- * Now find out how much time until the earliest timeout. This
- * transforms earliest from an absolute time into a delta time, the
- * time left until the select should timeout.
- */
- gettimeofday(&now, (struct timezone *)0);
- earliest.tv_sec--; /* adjust time to make arithmetic easier */
- earliest.tv_usec += 1000000L;
- earliest.tv_sec -= now.tv_sec;
- earliest.tv_usec -= now.tv_usec;
- while (earliest.tv_usec >= 1000000L){
- earliest.tv_usec -= 1000000L;
- earliest.tv_sec += 1;
- }
- if (earliest.tv_sec < 0){
- earliest.tv_sec = 0;
- earliest.tv_usec = 0;
- }
-
- /* if it was blocking before or our delta time is less, reset timeout */
- if (*block == 1 || timercmp(&earliest, timeout, <)){
- *timeout = earliest;
- *block = 0;
- }
- return active;
-}
-
-/*
- * snmp_timeout should be called whenever the timeout from
- * snmp_select_info expires, but it is idempotent, so snmp_timeout can
- * be polled (probably a cpu expensive proposition). snmp_timeout
- * checks to see if any of the sessions have an outstanding request
- * that has timed out. If it finds one (or more), and that pdu has
- * more retries available, a new packet is formed from the pdu and is
- * resent. If there are no more retries available, the callback for
- * the session is used to alert the user of the timeout.
- */
-void
-snmp_timeout()
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
-#if 1 /***/ /* replacing freeme by simpler and safer rp_next*/
- struct request_list *rp, *rp_next = 0;
-#endif /***/
- struct timeval now;
-
- gettimeofday(&now, (struct timezone *)0);
- /*
- * For each request outstanding, check to see if it has expired.
- */
- for(slp = Sessions; slp; slp = slp->next){
- sp = slp->session;
- isp = slp->internal;
-#if 1 /***/ /* simplification */
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (timercmp(&rp->expire, &now, <)){
- /* this timer has expired */
- if (rp->retries >= sp->retries){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_TIMEOUT);
-#endif
- /* No more chances, delete this entry */
- sp->callback(TIMED_OUT, sp, rp->pdu->reqid, rp->pdu, sp->callback_magic);
- free_one_request(isp, rp);
- continue;
-#endif /***/
- } else {
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct timeval tv;
-
- /* retransmit this pdu */
- rp->retries++;
- rp->timeout <<= 1;
- if (snmp_build(sp, rp->pdu, packet, &length, 0) < 0) {
- fprintf(stderr, "Error building packet\n");
- }
- the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu * pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (! pdu)
- return;
-
- vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
- }
- if (pdu->enterprise) {
- free((char *)pdu->enterprise);
- }
- free((char *)pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, from, 0);
- }
- pdu = (struct snmp_pdu *)calloc(1, sizeof(struct snmp_pdu));
-
- if(! pdu){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
- }
-#endif /***/
-
- pdu->address = from;
- pdu->reqid = 0;
- pdu->variables = NULL;
- pdu->enterprise = NULL;
- pdu->enterprise_length = 0;
- if (snmp_parse(sp, pdu, packet, length) < 0){
- fprintf(stderr, "Mangled packet\n");
- snmp_free_pdu(pdu);
- return\10\0BÐ+= m\0\0
-È /* \10\0>X*/ B\10\04¨NMPT\10\ 1ì\0 */c\0\0\0\0for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu * pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (! pdu)
- return;
-
- vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
- }
- if (pdu->enterprise) {
- free((char *)pdu->enterprise);
- }
- free((char *)pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, from, 0);
- }
- pdu = (struct snmp_pdu *)calloc(1, sizeof(struct snmp_pdu));
-
- if(! pdu){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
- }
-#endif /***/
-
- pdu->address = from;
- pdu->reqid = 0;
- pdu->variables = NULL;
- pdu->enterprise = NULL;
- pdu->enterprise_length = 0;
- if (snmp_parse(sp, pdu, packet, length) < 0){
- fprintf(stderr, "Mangled packet\n");
- snmp_free_pdu(pdu);
- return;
- }
-
- if (pdu->command == GET_RSP_MSG || pdu->command == REPORT_MSG){
-#if 1 /***/ /* bug fix: illegal re-use of rp killed some requests */
- struct request_list *rp_next= 0;
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (rp->request_id == pdu->reqid){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_RECV);
-#endif
- if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1){
- /* successful, so delete request */
- free_one_request(isp, rp);
- break; /* no more request with the same reqid */
- }
- }
- }
-#endif /***/
- } else if (pdu->command == GET_REQ_MSG
- || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG
- || pdu->command == TRP_REQ_MSG || pdu->command == SET_REQ_MSG){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, NULL, TRACE_RECV);
-#endif
- sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic);
- }
- snmp_free_pdu(pdu);
- }
- }
-}
-
-/*
- * Returns info about what snmp requires from a select statement.
- * numfds is the number of fds in the list that are significant.
- * All file descriptors opened for SNMP are OR'd into the fdset.
- * If activity occurs on any of these file descriptors, snmp_read
- * should be called with that file descriptor set
- *
- * The timeout is the latest time that SNMP can wait for a timeout. The
- * select should be done with the minimum time between timeout and any other
- * timeouts necessary. This should be checked upon each invocation of select.
- * If a timeout is received, snmp_timeout should be called to check if the
- * timeout was for SNMP. (snmp_timeout is idempotent)
- *
- * Block is 1 if the select is requested to block indefinitely, rather
- * than time out. If block is input as 1, the timeout value will be
- * treated as undefined, but it must be available for setting in
- * snmp_select_info. On return, if block is true, the value of
- * timeout will be undefined.
- *
- * snmp_select_info returns the number of open sockets. (i.e. The
- * number of sessions open)
- */
-int
-snmp_select_info(numfds, fdset, timeout, block)
- int *numfds;
- fd_set *fdset;
- struct timeval *timeout;
- int *block; /* should the select block until input arrives (i.e. no input) */
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- struct request_list *rp;
- struct timeval now, earliest;
- int active = 0, requests = 0;
-
- timerclear(&earliest);
- /*
- * For each request outstanding, add it's socket to the fdset,
- * and if it is the earliest timeout to expire, mark it as lowest.
- */
- for(slp = Sessions; slp; slp = slp->next){
- active++;
- isp = slp->internal;
- if ((isp->sd + 1) > *numfds)
- *numfds = (isp->sd + 1);
- FD_SET(isp->sd, fdset);
- if (isp->requests){
- /* found another session with outstanding requests */
- requests++;
- for(rp = isp->requests; rp; rp = rp->next_request){
- if (!timerisset(&earliest) || timercmp(&rp->expire, &earliest, <))
- earliest = rp->expire;
- }
- }
- }
- if (requests == 0) /* if none are active, skip arithmetic */
- return active;
-
- /*
- * Now find out how much time until the earliest timeout. This
- * transforms earliest from an absolute time into a delta time, the
- * time left until the select should timeout.
- */
- gettimeofday(&now, (struct timezone *)0);
- earliest.tv_sec--; /* adjust time to make arithmetic easier */
- earliest.tv_usec += 1000000L;
- earliest.tv_sec -= now.tv_sec;
- earliest.tv_usec -= now.tv_usec;
- while (earliest.tv_usec >= 1000000L){
- earliest.tv_usec -= 1000000L;
- earliest.tv_sec += 1;
- }
- if (earliest.tv_sec < 0){
- earliest.tv_sec = 0;
- earliest.tv_usec = 0;
- }
-
- /* if it was blocking before or our delta time is less, reset timeout */
- if (*block == 1 || timercmp(&earliest, timeout, <)){
- *timeout = earliest;
- *block = 0;
- }
- return active;
-}
-
-/*
- * snmp_timeout should be called whenever the timeout from
- * snmp_select_info expires, but it is idempotent, so snmp_timeout can
- * be polled (probably a cpu expensive proposition). snmp_timeout
- * checks to see if any of the sessions have an outstanding request
- * that has timed out. If it finds one (or more), and that pdu has
- * more retries available, a new packet is formed from the pdu and is
- * resent. If there are no more retries available, the callback for
- * the session is used to alert the user of the timeout.
- */
-void
-snmp_timeout()
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
-#if 1 /***/ /* replacing freeme by simpler and safer rp_next*/
- struct request_list *rp, *rp_next = 0;
-#endif /***/
- struct timeval now;
-
- gettimeofday(&now, (struct timezone *)0);
- /*
- * For each request outstanding, check to see if it has expired.
- */
- for(slp = Sessions; slp; slp = slp->next){
- sp = slp->session;
- isp = slp->internal;
-#if 1 /***/ /* simplification */
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (timercmp(&rp->expire, &now, <)){
- /* this timer has expired */
- if (rp->retries >= sp->retries){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_TIMEOUT);
-#endif
- /* No more chances, delete this entry */
- sp->callback(TIMED_OUT, sp, rp->pdu->reqid, rp->pdu, sp->callback_magic);
- free_one_request(isp, rp);
- continue;
-#endif /***/
- } else {
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct timeval tv;
-
- /* retransmit this pdu */
- rp->retries++;
- rp->timeout <<= 1;
- if (snmp_build(sp, rp->pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- }
-#if 1 /***/
- if (snmp_dump_packet) {
- snmp_print_packet(packet, length, rp->pdu->address, 1);
- }
-#endif/***/ mplification */by simpler and safer rp_next*/n s */ replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
-\10\0=p\7fÿ³3\7fÿ³B\7fÿ³S\7fÿ³]\7fÿ³i\0\0\0\18\7fÿ³\82\0\0\0\ 1\7fÿ³ \7fÿ³\7fÿ³º\7fÿ³Ê\7fÿ³×\0\0\0Á\7fÿ³ù\0\0\0\10\7fÿ´\10\10\0=ø\0%\0\19\0\15\0\0\10\0D(\0\0\0\10\7fÿ´_\10\0=à\0\0\ 2\\0\0\0\0\10\0BØ\0\0\0\10\7fÿ´©\10\0=\98\0\0\ 24\0\0\0\0\10\0BØ\0\0\0\10\7fÿ´ø\10\0=È\0\0\ 2H\0\0\0\0\10\0BØ\0\0\0\10\7fÿµB\10\0>\10\7fÿµ]\7fÿµm\7fÿµz\0\0\0\10\7fÿµ \10\0>(\7fÿµ·\7fÿµÉ\7fÿµÖ\0\0\0\10\7fÿµï\10\0>@\7fÿ¶\12\7fÿ¶ \7fÿ¶4\0\0\0\10\7fÿ¶P\0\0\0\ 1\7fÿ¶r\7fÿ¶~\7fÿ¶\88\0\0\00\7fÿ¶\9f\10\0\82à\7fÿ¶·\0\0\0\0\7fÿ¶Ù\10\04¨\7fÿ·\ 1\0\0\0\0\7fÿ·#\7fÿ·/\7fÿ·>\10\0>X\7fÿ·V\0\0\03\0\0\0\0/usr/people/wessels/.indent.pro\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 4\ 1\0\0\0\0\7fÿ¯è\7fÿ¯ù\7fÿ°\f\7fÿ°\e\7fÿ°.\7fÿ°?\7fÿ°M\7fÿ°[\7fÿ°p\7fÿ°\85\7fÿ°\95\7fÿ°£\7fÿ°²\7fÿ°Å\7fÿ°Û\7fÿ°ñ\7fÿ±
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-\7fÿ³ \7fÿ³3\7fÿ³B\7fÿ³S\7fÿ³]\7fÿ³i\7fÿ³s\7fÿ³\82\7fÿ³\91\7fÿ³ \7fÿ³\7fÿ³º\7fÿ³Ê\7fÿ³×\7fÿ³ç\7fÿ³ù\7fÿ´\ 4\7fÿ´\10\7fÿ´\1e\7fÿ´)\7fÿ´3\7fÿ´C\7fÿ´O\7fÿ´_\7fÿ´k\7fÿ´t\7fÿ´\81\7fÿ´\8f\7fÿ´\9f\7fÿ´©\7fÿ´·\7fÿ´Å\7fÿ´Ò\7fÿ´Ý\7fÿ´í\7fÿ´ø\7fÿµ\ 3\7fÿµ\10\7fÿµ\1d\7fÿµ)\7fÿµ7\7fÿµB\7fÿµM\7fÿµ]\7fÿµm\7fÿµz\7fÿµ\89\7fÿµ \7fÿµ«\7fÿµ·\7fÿµÉ\7fÿµÖ\7fÿµâ\7fÿµï\7fÿ¶\ 3\7fÿ¶\12\7fÿ¶ \7fÿ¶4\7fÿ¶?\7fÿ¶P\7fÿ¶b\7fÿ¶r\7fÿ¶~\7fÿ¶\88\7fÿ¶\94\7fÿ¶\9f\7fÿ¶«\7fÿ¶·\7fÿ¶É\7fÿ¶Ù\7fÿ¶í\7fÿ·\ 1\7fÿ·\15\7fÿ·#\7fÿ·/\7fÿ·>\7fÿ·L\7fÿ·V\7fÿ·f\7fÿ·q\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0@ \0\0\0\064));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu * pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (! pdu)
- return;
-
- vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
- }
- if (pdu->enterprise) {
- free((char *)pdu->enterprise);
- }
- free((char *)pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, from, 0);
- }
- pdu = (struct snmp_pdu *)calloc(1, sizeof(struct snmp_pdu));
-
- if(! pdu){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
- }
-#endif /***/
-
- pdu->address = from;
- pdu->reqid = 0;
- pdu->variables = NULL;
- pdu->enterprise = NULL;
- pdu->enterprise_length = 0;
- if (snmp_parse(sp, pdu, packet, length) < 0){
- fprintf(stderr, "Mangled packet\n");
- snmp_free_pdu(pdu);
- return;
- }
-
- if (pdu->command == GET_RSP_MSG || pdu->command == REPORT_MSG){
-#if 1 /***/ /* bug fix: illegal re-use of rp killed some requests */
- struct request_list *rp_next= 0;
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (rp->request_id == pdu->reqid){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_RECV);
-#endif
- if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1){
- /* successful, so delete request */
- free_one_request(isp, rp);
- break; /* no more request with the same reqid */
- }
- }
- }
-#endif /***/
- } else if (pdu->command == GET_REQ_MSG
- || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG
- || pdu->command == TRP_REQ_MSG || pdu->command == SET_REQ_MSG){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, NULL, TRACE_RECV);
-#endif
- sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic);
- }
- snmp_free_pdu(pdu);
- }
- }
-}
-
-/*
- * Returns info about what snmp requires from a select statement.
- * numfds is the number of fds in the list that are significant.
- * All file descriptors opened for SNMP are OR'd into the fdset.
- * If activity occurs on any of these file descriptors, snmp_read
- * should be called with that file descriptor set
- *
- * The timeout is the latest time that SNMP can wait for a timeout. The
- * select should be done with the minimum time between timeout and any other
- * timeouts necessary. This should be checked upon each invocation of select.
- * If a timeout is received, snmp_timeout should be called to check if the
- * timeout was for SNMP. (snmp_timeout is idempotent)
- *
- * Block is 1 if the select is requested to block indefinitely, rather
- * than time out. If block is input as 1, the timeout value will be
- * treated as undefined, but it must be available for setting in
- * snmp_select_info. On return, if block is true, the value of
- * timeout will be undefined.
- *
- * snmp_select_info returns the number of open sockets. (i.e. The
- * number of sessions open)
- */
-int
-snmp_select_info(numfds, fdset, timeout, block)
- int *numfds;
- fd_set *fdset;
- struct timeval *timeout;
- int *block; /* should the select block until input arrives (i.e. no input) */
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- struct request_list *rp;
- struct timeval now, earliest;
- int active = 0, requests = 0;
-
- timerclear(&earliest);
- /*
- * For each request outstanding, add it's socket to the fdset,
- * and if it is the earliest timeout to expire, mark it as lowest.
- */
- for(slp = Sessions; slp; slp = slp->next){
- active++;
- isp = slp->internal;
- if ((isp->sd + 1) > *numfds)
- *numfds = (isp->sd + 1);
- FD_SET(isp->sd, fdset);
- if (isp->requests){
- /* found another session with outstanding requests */
- requests++;
- for(rp = isp->requests; rp; rp = rp->next_request){
- if (!timerisset(&earliest) || timercmp(&rp->expire, &earliest, <))
- earliest = rp->expire;
- }
- }
- }
- if (requests == 0) /* if none are active, skip arithmetic */
- return active;
-
- /*
- * Now find out how much time until the earliest timeout. This
- * transforms earliest from an absolute time into a delta time, the
- * time left until the select should timeout.
- */
- gettimeofday(&now, (struct timezone *)0);
- earliest.tv_sec--; /* adjust time to make arithmetic easier */
- earliest.tv_usec += 1000000L;
- earliest.tv_sec -= now.tv_sec;
- earliest.tv_usec -= now.tv_usec;
- while (earliest.tv_usec >= 1000000L){
- earliest.tv_usec -= 1000000L;
- earliest.tv_sec += 1;
- }
- if (earliest.tv_sec < 0){
- earliest.tv_sec = 0;
- earliest.tv_usec = 0;
- }
-
- /* if it was blocking before or our delta time is less, reset timeout */
- if (*block == 1 || timercmp(&earliest, timeout, <)){
- *timeout = earliest;
- *block = 0;
- }
- return active;
-}
-
-/*
- * snmp_timeout should be called whenever the timeout from
- * snmp_select_info expires, but it is idempotent, so snmp_timeout can
- * be polled (probably a cpu expensive proposition). snmp_timeout
- * checks to see if any of the sessions have an outstanding request
- * that has timed out. If it finds one (or more), and that pdu has
- * more retries available, a new packet is formed from the pdu and is
- * resent. If there are no more retries available, the callback for
- * the session is used to alert the user of the timeout.
- */
-void
-snmp_timeout()
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
-#if 1 /***/ /* replacing freeme by simpler and safer rp_next*/
- struct request_list *rp, *rp_next = 0;
-#endif /***/
- struct timeval now;
-
- gettimeofday(&now, (struct timezone *)0);
- /*
- * For each request outstanding, check to see if it has expired.
- */
- for(slp = Sessions; slp; slp = slp->next){
- sp = slp->session;
- isp = slp->internal;
-#if 1 /***/ /* simplification */
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (timercmp(&rp->expire, &now, <)){
- /* this timer has expired */
- if (rp->retries >= sp->retries){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_TIMEOUT);
-#endif
- /* No more chances, delete this entry */
- sp->callback(TIMED_OUT, sp, rp->pdu->reqid, rp->pdu, sp->callback_magic);
- free_one_request(isp, rp);
- continue;
-#endif /***/
- } else {
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct timeval tv;
-
- /* retransmit this pdu */
- rp->retries++;
- rp->timeout <<= 1;
- if (snmp_build(sp, rp->pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- }
-#if 1 /***/
- if (snmp_dump_packet) {
- snmp_print_packet(packet, length, rp->pdu->address, 1);
- }
- If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter\10\0BÐ+= m\0\0
-È /* \0\0\0\0*/ B\10\0>XNMPT\10\ 1í\88 */c\0\0\0\0for testing purposes */e key! replace...
- */
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
-{
- struct request_list *orp;
-
- while(rp){
- orp = rp;
- rp = rp->next_request;
- if (orp->pdu != NULL)
- snmp_free_pdu(orp->pdu);
- free((char *)orp);
- }
-}
-
-/*
- * Close the input session. Frees all data allocated for the session,
- * dequeues any pending requests, and closes any sockets allocated for
- * the session. Returns 0 on error, 1 otherwise.
- */
-int
-snmp_close(session)
- struct snmp_session *session;
-{
- struct session_list *slp = NULL, *oslp = NULL;
-
- if (Sessions->session == session){ /* If first entry */
- slp = Sessions;
- Sessions = slp->next;
- } else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
- oslp->next = slp->next; /* link around this entry */
- break;
- }
- oslp = slp;
- }
- }
- /* If we found the session, free all data associated with it */
- if (slp){
- if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
- if (slp->internal->sd != -1)
- close(slp->internal->sd);
- free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
- } else {
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- return 1;
-}
-
-/*
- * Takes a session and a pdu and serializes the ASN PDU into the area
- * pointed to by packet. out_length is the size of the data area available.
- * Returns the length of the completed packet in out_length. If any errors
- * occur, -1 is returned. If all goes well, 0 is returned.
- */
-int
-snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
-{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
- struct variable_list *vp;
- int length;
- int totallength;
-
- length = *out_length;
- cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
- if (cp == NULL)
- return -1;
- }
- totallength = cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
- if (cp == NULL)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
- /* request id */
- cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (cp == NULL)
- return -1;
- /* error status */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (cp == NULL)
- return -1;
- /* error index */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (cp == NULL)
- return -1;
- } else { /* this is a trap message */
- /* enterprise */
- cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
- if (cp == NULL)
- return -1;
- /* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
- if (cp == NULL)
- return -1;
- /* generic trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (cp == NULL)
- return -1;
- /* specific trap */
- cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (cp == NULL)
- return -1;
- /* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
- if (cp == NULL)
- return -1;
- }
- if (length < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
-
- length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
- if (cp == NULL)
- return -1;
- if (length < totallength)
- return -1;
- bcopy((char *)packet, (char *)cp, totallength);
- totallength += cp - buf;
-
- length = *out_length;
-
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
- if (cp == NULL)
- return -1;
- if ((*out_length - (cp - packet)) < totallength)
- return -1;
- bcopy((char *)buf, (char *)cp, totallength);
- totallength += cp - packet;
- *out_length = totallength;
-
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
-
- return 0;
-}
-
-/*
- * Parses the packet received on the input session, and places the data into
- * the input pdu. length is the length of the input packet. If any errors
- * are encountered, -1 is returned. Otherwise, a 0 is returned.
- */
-static int
-snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
-{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
- u_char community[256];
- int community_length = 256;
- struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu * pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (! pdu)
- return;
-
- vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
- }
- if (pdu->enterprise) {
- free((char *)pdu->enterprise);
- }
- free((char *)pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, from, 0);
- }
- pdu = (struct snmp_pdu *)calloc(1, sizeof(struct snmp_pdu));
-
- if(! pdu){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
- }
-#endif /***/
-
- pdu->address = from;
- pdu->reqid = 0;
- pdu->variables = NULL;
- pdu->enterprise = NULL;
- pdu->enterprise_length = 0;
- if (snmp_parse(sp, pdu, packet, length) < 0){
- fprintf(stderr, "Mangled packet\n");
- snmp_free_pdu(pdu);
- return;
- }
-
- if (pdu->command == GET_RSP_MSG || pdu->command == REPORT_MSG){
-#if 1 /***/ /* bug fix: illegal re-use of rp killed some requests */
- struct request_list *rp_next= 0;
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (rp->request_id == pdu->reqid){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_RECV);
-#endif
- if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1){
- /* successful, so delete request */
- free_one_request(isp, rp);
- break; /* no more request with the same reqid */
- }
- }
- }
-#endif /***/
- } else if (pdu->command == GET_REQ_MSG
- || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG
- || pdu->command == TRP_REQ_MSG || pdu->command == SET_REQ_MSG){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, NULL, TRACE_RECV);
-#endif
- sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic);
- }
- snmp_free_pdu(pdu);
- }
- }
-}
-
-/*
- * Returns info about what snmp requires from a select statement.
- * numfds is the number of fds in the list that are significant.
- * All file descriptors opened for SNMP are OR'd into the fdset.
- * If activity occurs on any of these file descriptors, snmp_read
- * should be called with that file descriptor set
- *
- * The timeout is the latest time that SNMP can wait for a timeout. The
- * select should be done with the minimum time between timeout and any other
- * timeouts necessary. This should be checked upon each invocation of select.
- * If a timeout is received, snmp_timeout should be called to check if the
- * timeout was for SNMP. (snmp_timeout is idempotent)
- *
- * Block is 1 if the select is requested to block indefinitely, rather
- * than time out. If block is input as 1, the timeout value will be
- * treated as undefined, but it must be available for setting in
- * snmp_select_info. On return, if block is true, the value of
- * timeout will be undefined.
- *
- * snmp_select_info returns the number of open sockets. (i.e. The
- * number of sessions open)
- */
-int
-snmp_select_info(numfds, fdset, timeout, block)
- int *numfds;
- fd_set *fdset;
- struct timeval *timeout;
- int *block; /* should the select block until input arrives (i.e. no input) */
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- struct request_list *rp;
- struct timeval now, earliest;
- int active = 0, requests = 0;
-
- timerclear(&earliest);
- /*
- * For each request outstanding, add it's socket to the fdset,
- * and if it is the earliest timeout to expire, mark it as lowest.
- */
- for(slp = Sessions; slp; slp = slp->next){
- active++;
- isp = slp->internal;
- if ((isp->sd + 1) > *numfds)
- *numfds = (isp->sd + 1);
- FD_SET(isp->sd, fdset);
- if (isp->requests){
- /* found another session with outstanding requests */
- requests++;
- for(rp = isp->requests; rp; rp = rp->next_request){
- if (!timerisset(&earliest) || timercmp(&rp->expire, &earliest, <))
- earliest = rp->expire;
- }
- }
- }
- if (requests == 0) /* if none are active, skip arithmetic */
- return active;
-
- /*
- * Now find out how much time until the earliest timeout. This
- * transforms earliest from an absolute time into a delta time, the
- * time left until the select should timeout.
- */
- gettimeofday(&now, (struct timezone *)0);
- earliest.tv_sec--; /* adjust time to make arithmetic easier */
- earliest.tv_usec += 1000000L;
- earliest.tv_sec -= now.tv_sec;
- earliest.tv_usec -= now.tv_usec;
- while (earliest.tv_usec >= 1000000L){
- earliest.tv_usec -= 1000000L;
- earliest.tv_sec += 1;
- }
- if (earliest.tv_sec < 0){
- earliest.tv_sec = 0;
- earliest.tv_usec = 0;
- }
-
- /* if it was blocking before or our delta time is less, reset timeout */
- if (*block == 1 || timercmp(&earliest, timeout, <)){
- *timeout = earliest;
- *block = 0;
- }
- return active;
-}
-
-/*
- * snmp_timeout should be called whenever the timeout from
- * snmp_select_info expires, but it is idempotent, so snmp_timeout can
- * be polled (probably a cpu expensive proposition). snmp_timeout
- * checks to see if any of the sessions have an outstanding request
- * that has timed out. If it finds one (or more), and that pdu has
- * more retries available, a new packet is formed from the pdu and is
- * resent. If there are no more retries available, the callback for
- * the session is used to alert the user of the timeout.
- */
-void
-snmp_timeout()
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
-#if 1 /***/ /* replacing freeme by simpler and safer rp_next*/
- struct request_list *rp, *rp_next = 0;
-#endif /***/
- struct timeval now;
-
- gettimeofday(&now, (struct timezone *)0);
- /*
- * For each request outstanding, check to see if it has expired.
- */
- for(slp = Sessions; slp; slp = slp->next){
- sp = slp->session;
- isp = slp->internal;
-#if 1 /***/ /* simplification */
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (timercmp(&rp->expire, &now, <)){
- /* this timer has expired */
- if (rp->retries >= sp->retries){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_TIMEOUT);
-#endif
- /* No more chances, delete this entry */
- sp->callback(TIMED_OUT, sp, rp->pdu->reqid, rp->pdu, sp->callback_magic);
- free_one_request(isp, rp);
- continue;
-#endif /***/
- } else {
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct timeval tv;
-
- /* retransmit this pdu */
- rp->retries++;
- rp->timeout <<= 1;
- if (snmp_build(sp, rp->pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, rp->pdu->address, 1);
- }
-#endif /***/
- gettimeofday(&tv, (struct timezone *) 0);
- if (sendto(isp->sd, (char *) packet, length, 0, (struct sockaddr *) &rp->pdu->address, sizeof(rp->pdu->address)) < 0) {
- perror("sendto");
- }
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- }
-#if 1 /***/ /* simplification */
- }
-#endif/***/ mplification */by simpler and safer rp_next*/n s */ replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
-\10\0=p\7fÿ³3\7fÿ³B\7fÿ³S\7fÿ³]\7fÿ³i\0\0\0\18\7fÿ³\82\0\0\0\ 1\7fÿ³ \7fÿ³\7fÿ³º\7fÿ³Ê\7fÿ³×\0\0\0Á\7fÿ³ù\0\0\0\10\7fÿ´\10\10\0=ø\0%\0\19\0\15\0\0\10\0D(\0\0\0\10\7fÿ´_\10\0=à\0\0\ 2\\0\0\0\0\10\0BØ\0\0\0\10\7fÿ´©\10\0=\98\0\0\ 24\0\0\0\0\10\0BØ\0\0\0\10\7fÿ´ø\10\0=È\0\0\ 2H\0\0\0\0\10\0BØ\0\0\0\10\7fÿµB\10\0>\10\7fÿµ]\7fÿµm\7fÿµz\0\0\0\10\7fÿµ \10\0>(\7fÿµ·\7fÿµÉ\7fÿµÖ\0\0\0\10\7fÿµï\10\0>@\7fÿ¶\12\7fÿ¶ \7fÿ¶4\0\0\0\10\7fÿ¶P\0\0\0\ 1\7fÿ¶r\7fÿ¶~\7fÿ¶\88\0\0\00\7fÿ¶\9f\0\0\0\0\7fÿ¶·\0\0\0\0\7fÿ¶Ù\10\0\82à\7fÿ·\ 1\0\0\0\0\7fÿ·#\7fÿ·/\7fÿ·>\10\0>X\7fÿ·V\0\0\03\0\0\0\0/usr/people/wessels/.indent.pro\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 4\ 1\0\0\0\0\7fÿ¯è\7fÿ¯ù\7fÿ°\f\7fÿ°\e\7fÿ°.\7fÿ°?\7fÿ°M\7fÿ°[\7fÿ°p\7fÿ°\85\7fÿ°\95\7fÿ°£\7fÿ°²\7fÿ°Å\7fÿ°Û\7fÿ°ñ\7fÿ±
-\7fÿ±\1e\7fÿ±2\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\7fÿ±\99\7fÿ±«\7fÿ±º\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\7fÿ²\ f\7fÿ²\1d\7fÿ²2\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\7fÿ²\7f\7fÿ²\8a\7fÿ²\99\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\7fÿ²ö\7fÿ³
-\7fÿ³ \7fÿ³3\7fÿ³B\7fÿ³S\7fÿ³]\7fÿ³i\7fÿ³s\7fÿ³\82\7fÿ³\91\7fÿ³ \7fÿ³\7fÿ³º\7fÿ³Ê\7fÿ³×\7fÿ³ç\7fÿ³ù\7fÿ´\ 4\7fÿ´\10\7fÿ´\1e\7fÿ´)\7fÿ´3\7fÿ´C\7fÿ´O\7fÿ´_\7fÿ´k\7fÿ´t\7fÿ´\81\7fÿ´\8f\7fÿ´\9f\7fÿ´©\7fÿ´·\7fÿ´Å\7fÿ´Ò\7fÿ´Ý\7fÿ´í\7fÿ´ø\7fÿµ\ 3\7fÿµ\10\7fÿµ\1d\7fÿµ)\7fÿµ7\7fÿµB\7fÿµM\7fÿµ]\7fÿµm\7fÿµz\7fÿµ\89\7fÿµ \7fÿµ«\7fÿµ·\7fÿµÉ\7fÿµÖ\7fÿµâ\7fÿµï\7fÿ¶\ 3\7fÿ¶\12\7fÿ¶ \7fÿ¶4\7fÿ¶?\7fÿ¶P\7fÿ¶b\7fÿ¶r\7fÿ¶~\7fÿ¶\88\7fÿ¶\94\7fÿ¶\9f\7fÿ¶«\7fÿ¶·\7fÿ¶É\7fÿ¶Ù\7fÿ¶í\7fÿ·\ 1\7fÿ·\15\7fÿ·#\7fÿ·/\7fÿ·>\7fÿ·L\7fÿ·V\7fÿ·f\7fÿ·q\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0@ \0\0\0\0000000L;
- earliest.tv_sec += 1;
- }
- if (earliest.tv_sec < 0){
- earliest.tv_sec = 0;
- earliest.tv_usec = 0;
- }
-
- /* if it was blocking before or our delta time is less, reset timeout */
- if (*block == 1 || timercmp(&earliest, timeout, <)){
- *timeout = earliest;
- *block = 0;
- }
- return active;
-}
-
-/*
- * snmp_timeout should be called whenever the timeout from
- * snmp_select_info expires, but it is idempotent, so snmp_timeout can
- * be polled (probably a cpu expensive proposition). snmp_timeout
- * checks to see if any of the sessions have an outstanding request
- * that has timed out. If it finds one (or more), and that pdu has
- * more retries available, a new packet is formed from the pdu and is
- * resent. If there are no more retries available, the callback for
- * the session is used to alert the user of the timeout.
- */
-void
-snmp_timeout()
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
-#if 1 /***/ /* replacing freeme by simpler and safer rp_next*/
- struct request_list *rp, *rp_next = 0;
-#endif /***/
- struct timeval now;
-
- gettimeofday(&now, (struct timezone *)0);
- /*
- * For each request outstanding, check to see if it has expired.
- */
- for(slp = Sessions; slp; slp = slp->next){
- sp = slp->session;
- isp = slp->internal;
-#if 1 /***/ /* simplification */
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (timercmp(&rp->expire, &now, <)){
- /* this timer has expired */
- if (rp->retries >= sp->retries){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_TIMEOUT);
-#endif
- /* No more chances, delete this entry */
- sp->callback(TIMED_OUT, sp, rp->pdu->reqid, rp->pdu, sp->callback_magic);
- free_one_request(isp, rp);
- continue;
-#endif /***/
- } else {
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct timeval tv;
-
- /* retransmit this pdu */
- rp->retries++;
- rp->timeout <<= 1;
- if (snmp_build(sp, rp->pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, rp->pdu->address, 1);
- }
-#endif /***/
- gettimeofday(&tv, (struct timezone *) 0);
- if (sendto(isp->sd, (char *) packet, length, 0, (struct sockaddr *) &rp->pdu->address, sizeof(rp->pdu->address)) < 0) {
- perror("sendto");
- }
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- }
-#if 1 /***/ /* simplification */
- }
-ata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
-
- /* authenticates message and returns length if valid */
- data = snmp_auth_parse(data, &length, community, &community_length, &version);
- if (data == NULL)
- return -1;
-
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
- }
-
- save_data = data;
-
- data = asn_parse_header(data, &length, &msg_type);
- if (data == NULL)
- return -1;
- pdu->command = msg_type;
-
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
- }
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
- if (data == NULL)
- return -1;
- } else {
- pdu->enterprise_length = MAX_NAME_LEN;
- data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
- if (data == NULL)
- return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
-
- four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
- if (data == NULL)
- return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
- if (data == NULL)
- return -1;
- }
- data = asn_parse_header(data, &length, &type);
- if (data == NULL)
- return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
- return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- } else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
- vp = vp->next_variable;
- }
- vp->next_variable = NULL;
- vp->val.string = NULL;
- vp->name = NULL;
- vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
- if (data == NULL)
- return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
- vp->name = op;
-
- len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
- }
- }
- return ret;
-}
-
-/*
- * Sends the input pdu on the session after calling snmp_build to create
- * a serialized packet. If necessary, set some of the pdu data from the
- * session defaults. Add a request corresponding to this pdu to the list
- * of outstanding requests on this session, then send the pdu.
- * Returns the request id of the generated packet if applicable, otherwise 1.
- * On any error, 0 is returned.
- * The pdu is freed by snmp_send() unless a failure occured.
- */
-int
-snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
- int length = PACKET_LENGTH;
- struct request_list *rp;
- struct timeval tv;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- isp = slp->internal;
- break;
- }
- }
-
- if (! pdu) {
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-
- if (isp == NULL){
- snmp_errno = SNMPERR_BAD_SESSION;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
- if (pdu->reqid == SNMP_DEFAULT_REQID)
- pdu->reqid = ++Reqid;
- if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
- pdu->errstat = 0;
- if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
- pdu->errindex = 0;
- } else {
- /* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
- }
- if (pdu->time == SNMP_DEFAULT_TIME)
- pdu->time = DEFAULT_TIME;
- }
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
- } else {
- fprintf(stderr, "No remote IP address specified\n");
- snmp_errno = SNMPERR_BAD_ADDRESS;
- return 0;
- }
- }
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
- fprintf(stderr, "Error building packet\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
- }
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
- perror("sendto");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
- /* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
- rp->next_request = isp->requests;
- isp->requests = rp;
- rp->pdu = pdu;
- rp->request_id = pdu->reqid;
-
- rp->retries = 1;
- rp->timeout = session->timeout;
- rp->time = tv;
- tv.tv_usec += rp->timeout;
- tv.tv_sec += tv.tv_usec / 1000000L;
- tv.tv_usec %= 1000000L;
- rp->expire = tv;
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_SEND);
-#endif
- }
- return pdu->reqid;
-}
-
-/*
- * Frees the pdu and any malloc'd data associated with it.
- */
-void
-snmp_free_pdu(struct snmp_pdu * pdu)
-{
- struct variable_list *vp, *ovp;
-
- if (! pdu)
- return;
-
- vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
- }
- if (pdu->enterprise) {
- free((char *)pdu->enterprise);
- }
- free((char *)pdu);
-}
-
-
-/*
- * Checks to see if any of the fd's set in the fdset belong to
- * snmp. Each socket with it's fd set has a packet read from it
- * and snmp_parse is called on the packet received. The resulting pdu
- * is passed to the callback routine for that session. If the callback
- * routine returns successfully, the pdu and it's request are deleted.
- */
-void
-snmp_read(fdset)
- fd_set *fdset;
-{
- struct session_list *slp;
- struct snmp_session *sp;
- struct snmp_internal_session *isp;
- u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
- ssize_t length, fromlength;
- struct snmp_pdu *pdu;
- struct request_list *rp /**, *orp **/ ;
-
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
- sp = slp->session;
- isp = slp->internal;
- fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
- if (length == -1) {
- perror("recvfrom");
- return;
- }
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, from, 0);
- }
- pdu = (struct snmp_pdu *)calloc(1, sizeof(struct snmp_pdu));
-
- if(! pdu){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
- }
-#endif /***/
-
- pdu->address = from;
- pdu->reqid = 0;
- pdu->variables = NULL;
- pdu->enterprise = NULL;
- pdu->enterprise_length = 0;
- if (snmp_parse(sp, pdu, packet, length) < 0){
- fprintf(stderr, "Mangled packet\n");
- snmp_free_pdu(pdu);
- return;
- }
-
- if (pdu->command == GET_RSP_MSG || pdu->command == REPORT_MSG){
-#if 1 /***/ /* bug fix: illegal re-use of rp killed some requests */
- struct request_list *rp_next= 0;
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (rp->request_id == pdu->reqid){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_RECV);
-#endif
- if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1){
- /* successful, so delete request */
- free_one_request(isp, rp);
- break; /* no more request with the same reqid */
- }
- }
- }
-#endif /***/
- } else if (pdu->command == GET_REQ_MSG
- || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG
- || pdu->command == TRP_REQ_MSG || pdu->command == SET_REQ_MSG){
-#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, NULL, TRACE_RECV);
-#endif
- sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic);
- }
- snmp_free_pdu(pdu);
- }
- }
-}
-
-/*
- * Returns info about what snmp requires from a select statement.
- * numfds is the number of fds in the list that are significant.
- * All file descriptors opened for SNMP are OR'd into the fdset.
- * If activity occurs on any of these file descriptors, snmp_read
- * should be called with that file descriptor set
- *
- * The timeout is the latest time that SNMP can wait for a timeout. The
- * select should be done with the minimum time between timeout and any other
- * timeouts necessary. This should be checked upon each invocation of select.
- * If a timeout is received, snmp_timeout should be called to check if the
- * timeout was for SNMP. (snmp_timeout is idempotent)
- *
- * Block is 1 if the select is requested to block indefinitely, rather
- * than time out. If block is input as 1, the timeout value will be
- * treated as undefined, but it must be available for setting in
- * snmp_select_info. On return, if block is true, the value of
- * timeout will be undefined.
- *
- * snmp_select_info returns the number of open sockets. (i.e. The
- * number of sessions open)
- */
-int
-snmp_select_info(numfds, fdset, timeout, block)
- int *numfds;
- fd_set *fdset;
- struct timeval *timeout;
- int *block; /* should the select block until input arrives (i.e. no input) */
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- struct request_list *rp;
- struct timeval now, earliest;
- int active = 0, requests = 0;
-
- timerclear(&earliest);
- /*
- * For each request outstanding, add it's socket to the fdset,
- * and if it is the earliest timeout to expire, mark it as lowest.
- */
- for(slp = Sessions; slp; slp = slp->next){
- active++;
- isp = slp->internal;
- if ((isp->sd + 1) > *numfds)
- *numfds = (isp->sd + 1);
- FD_SET(isp->sd, fdset);
- if (isp->requests){
- /* found another session with outstanding requests */
- requests++;
- for(rp = isp->requests; rp; rp = rp->next_request){
- if (!timerisset(&earliest) || timercmp(&rp->expire, &earliest, <))
- earliest = rp->expire;
- }
- }
- }
- if (requests == 0) /* if none are active, skip arithmetic */
- return active;
-
- /*
- * Now find out how much time until the earliest timeout. This
- * transforms earliest from an absolute time into a delta time, the
- * time left until the select should timeout.
- */
- gettimeofday(&now, (struct timezone *)0);
- earliest.tv_sec--; /* adjust time to make arithmetic easier */
- earliest.tv_usec += 1000000L;
- earliest.tv_sec -= now.tv_sec;
- earliest.tv_usec -= now.tv_usec;
- while (earliest.tv_usec >= 1000000L){
- earliest.tv_usec -= 1\10\0BÐ+= m\0\0
-È /* \10\0>X*/ B\10\04¨NMPT\10\ 1í\88 */c\0\0\0\0for testing purposes */e key! replace...
- */
- * \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 1\ 1\0\0\0\0\0\0\0\19\7fÿ¯ùsnmplib/snmp_api.c\0c\0\0.h\0\0\0\18\7fÿ°\85\10\0<Ðlib/snmp_api.c~\0~\0\0ñ\0\0\0\18\7fÿ±\1e\10\0<ð\7fÿ±F\7fÿ±Y\7fÿ±i\7fÿ±{\7fÿ±\8a\0\0\0\18\7fÿ±«\10\0=\10\7fÿ±Ç\7fÿ±Ó\7fÿ±é\7fÿ±÷\7fÿ²\ 1\0\0\0\18\7fÿ²\1d\10\0=0\7fÿ²<\7fÿ²K\7fÿ²W\7fÿ²f\7fÿ²t\0\0\0\18\7fÿ²\8a\10\0=P\7fÿ²¨\7fÿ²¶\7fÿ²Ä\7fÿ²Ô\7fÿ²ã\0\0\0\18\7fÿ³
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- Copyright 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of CMU not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-******************************************************************/
-/*
- * snmp_api.c - API for access to snmp.
- */
-#define DEBUG_SNMPTRACE 0 /* set to 1 to print all SNMP actions */
-#define DEBUG_SNMPFULLDUMP 0 /* set to 1 to dump all SNMP packets */
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#ifdef linux
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#endif
-
-
-#include "asn1.h"
-#include "snmp.h"
-#include "snmp_impl.h"
-#include "snmp_api.h"
-#include "snmp_client.h"
-
-#define PACKET_LENGTH 4500
-
-#ifndef BSD4_3
-#define BSD4_2
-#endif
-
-#if !defined(BSD4_3) && !defined(linux) && !defined(sun)
-
-typedef long fd_mask;
-#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
-
-#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
-#endif
-
-oid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
-
-#define DEFAULT_COMMUNITY "public"
-#define DEFAULT_REMPORT SNMP_PORT
-#define DEFAULT_ENTERPRISE default_enterprise
-#define DEFAULT_TIME 0
-#define DEFAULT_MMS 1389 /* large, randomly picked for testing purposes */
-
-/*
- * Internal information about the state of the snmp session.
- */
-struct snmp_internal_session {
- int sd; /* socket descriptor for this connection */
- ipaddr addr; /* address of connected peer */
- struct request_list *requests;/* Info about outstanding requests */
-};
-
-/*
- * A list of all the outstanding requests for a particular session.
- */
-struct request_list {
- struct request_list *next_request;
- u_long request_id; /* request id */
- int retries; /* Number of retries */
- u_long timeout; /* length to wait for timeout */
- struct timeval time; /* Time this request was made */
- struct timeval expire; /* time this request is due to expire */
- struct snmp_pdu *pdu; /* The pdu for this request (saved so it can be retransmitted */
-};
-
-/*
- * The list of active/open sessions.
- */
-struct session_list {
- struct session_list *next;
- struct snmp_session *session;
- struct snmp_internal_session *internal;
-};
-
-struct session_list *Sessions = NULL;
-
-u_long Reqid = 0;
-int snmp_errno = 0;
-
-char *api_errors[4] = {
- "Unknown session",
- "Unknown host",
- "Invalid local port",
- "Unknown Error"
-};
-
-
-void sync_with_agent();
-int parse_app_community_string();
-void snmp_synch_setup();
-int snmp_synch_response();
-void md5Digest();
-
-
-static char *
-api_errstring(snmp_errnumber)
- int snmp_errnumber;
-{
- if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
- return api_errors[snmp_errnumber + 4];
- } else {
- return "Unknown Error";
- }
-}
-
-#if 0
-/*
- * Gets initial request ID for all transactions.
- */
-static void
-init_snmp(){
- struct timeval tv;
-
- gettimeofday(&tv, (struct timezone *)0);
- srandom(tv.tv_sec ^ tv.tv_usec);
- Reqid = random();
-}
-#endif
-
-
-/*
- * Dump snmp packet to stdout:
- */
-static void
-snmp_print_packet(packet, length, addr, code)
- char *packet;
- int length;
- ipaddr addr;
- int code;
-{
- if(length < 0) {
- return;
- }
- if (code <= 0) { /* received */
- printf("\nReceived %4d bytes from ", length);
- }
- else { /* sending */
- printf("\nSending %4d bytes to ", length);
- }
- printf("%s:", inet_ntoa(addr.sin_addr));
-#if DEBUG_SNMPFULLDUMP
- for (count = 0; count < length; count++) {
- if ((count & 15) == 0) {
- printf("\n ");
- }
- printf("%02X ", (int)(packet[count]&255));
- }
-#endif
- fflush(stdout);
-}
-
-#if DEBUG_SNMPTRACE
-/*
- * Print request
- */
-#define TRACE_SEND (0)
-#define TRACE_RECV (1)
-#define TRACE_TIMEOUT (2)
-static void
-snmp_print_trace(slp, rp, code)
- struct session_list *slp;
- struct request_list *rp;
- int code;
-{
- int reqid=0, retries=1;
- if( rp ){
- reqid = rp->request_id;
- retries = rp->retries;
- }
- printf("\n Session %2d ReqId %4d ", slp->internal->sd, reqid);
- switch(code)
- {
- case TRACE_SEND: printf("send pdu (%d)", retries);break;
- case TRACE_RECV: printf("recv pdu");break;
- case TRACE_TIMEOUT: printf("time out");break;
- }
- fflush(stdout);
-}
-#endif /* DEBUG_SNMPTRACE */
-
-
-
-
-/*
- * Sets up the session with the snmp_session information provided
- * by the user. Then opens and binds the necessary UDP port.
- * A handle to the created session is returned (this is different than
- * the pointer passed to snmp_open()). On any error, NULL is returned
- * and snmp_errno is set to the appropriate error code.
- */
-struct snmp_session *
-snmp_open(session)
- struct snmp_session *session;
-{
- struct session_list *slp;
- struct snmp_internal_session *isp;
- u_char *cp;
- int sd;
- u_long addr;
- struct sockaddr_in me;
- struct hostent *hp;
- struct servent *servp;
- extern int check_received_pkt();
-
- /* Copy session structure and link into list */
- slp = (struct session_list *)calloc(1, sizeof(struct session_list));
- slp->internal = isp = (struct snmp_internal_session *)calloc(1, sizeof(struct snmp_internal_session));
- bzero((char *)isp, sizeof(struct snmp_internal_session));
- slp->internal->sd = -1; /* mark it not set */
- slp->session = (struct snmp_session *)calloc(1, sizeof(struct snmp_session));
- bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
- session = slp->session;
- /* now link it in. */
- slp->next = Sessions;
- Sessions = slp;
-
- /*
- * session now points to the new structure that still contains pointers to
- * data allocated elsewhere. Some of this data is copied to space malloc'd
- * here, and the pointer replaced with the new one.
- */
-
- if (session->peername != NULL){
- cp = (u_char *)calloc(1, (unsigned)strlen(session->peername) + 1);
- strcpy((char *)cp, session->peername);
- session->peername = (char *)cp;
- }
-
- if (session->retries == SNMP_DEFAULT_RETRIES)
- session->retries = SNMP_API_DEFAULT_RETRIES;
- if (session->timeout == SNMP_DEFAULT_TIMEOUT)
- session->timeout = SNMP_API_DEFAULT_TIMEOUT;
- if (session->MMS == 0 )
- session->MMS = DEFAULT_MMS;
- isp->requests = NULL;
-
-
- /* Fill in defaults if necessary */
- if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
- if( *session->community == '+' ) {
- session->community_len--;
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community+1, (char *)cp,
- session->community_len);
- session->version = SNMP_VERSION_2C;
- } else {
- cp = (u_char *) calloc(1, (unsigned) session->community_len);
- bcopy((char *) session->community, (char *) cp,
- session->community_len);
- }
-
- } else {
- session->community_len = strlen(DEFAULT_COMMUNITY);
- cp = (u_char *)calloc(1, (unsigned)session->community_len);
- bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
- }
-
- /* Set up connections */
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0){
- perror("socket");
- snmp_errno = SNMPERR_GENERR;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(1);
- }
- return 0;
- }
- isp->sd = sd;
-
- if (session->peername != SNMP_DEFAULT_PEERNAME){
- if ((addr = inet_addr(session->peername)) != -1){
- bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
- } else {
- hp = gethostbyname(session->peername);
- if (hp == NULL){
- fprintf(stderr, "unknown host: %s\n", session->peername);
- snmp_errno = SNMPERR_BAD_ADDRESS;
- if (!snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
- exit(2);
- }
- return 0;
- } else {
- bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
- }
- }
- isp->addr.sin_family = AF_INET;
- if (session->remote_port == SNMP_DEFAULT_REMPORT){
- /*servp = getservbyname("snmp", "udp");*/
- servp=NULL;
- if (servp != NULL){
- isp->addr.sin_port = servp->s_port;
- } else {
- isp->addr.sin_port = htons(SNMP_PORT);
- }
- } else {
- isp->addr.sin_port = htons(session->remote_port);
- }
- } else {
- isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
- }
-
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(session->local_port);
- if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
- perror("bind");
- snmp_errno = SNMPERR_BAD_LOCPORT;
- if (! snmp_close(session)){
- fprintf(stderr, "Couldn't abort session: %s. Exiting\n",
- api_errstring(snmp_errno));
- exit(3);
- }
- return 0;
- }
-
- if( *cp == '/' ) {
- session->authenticator = check_received_pkt;
- sync_with_agent(session);
- parse_app_community_string( session );
- session->qoS |= USEC_QOS_GENREPORT;
- }
-
- /* replace comm pointer with pointer to new data: */
- session->community = cp;
-
- return session;
-}
-
-void
-sync_with_agent( session )
-struct snmp_session *session;
-{
- struct snmp_pdu *pdu, *response = 0;
- int status;
-
- session->qoS = USEC_QOS_GENREPORT;
- session->userLen = 6;
- session->version = SNMP_VERSION_2;
- strcpy( session->userName, "public" );
-
- snmp_synch_setup(session);
- pdu = snmp_pdu_create(GET_REQ_MSG);
- status = snmp_synch_response(session, pdu, &response);
-
- if (status == STAT_SUCCESS){
- memcpy( session->agentID, response->params.agentID, 12 );
-
- /* save the clocks -- even though they are not authentic */
- session->agentBoots = response->params.agentBoots;
- session->agentTime = response->params.agentTime;
- session->agentClock = response->params.agentTime - time(NULL);
-
- } else {
- if (status == STAT_TIMEOUT){
- printf("No Response from %s\n", session->peername);
- } else { /* status == STAT_ERROR */
- printf("An error occurred, Quitting\n");
- }
- exit( -1 );
- }
-
- /** freed to early:
- snmp_free_pdu(pdu);
- if (response) snmp_free_pdu(response);
- **/
-}
-#if 1 /***/
-/*
- * Unlink one element from input request list,
- * then free it and it's pdu.
- */
-static void
-free_one_request(isp, orp)
- struct snmp_internal_session *isp;
- struct request_list *orp;
-{
- struct request_list *rp;
- if(! orp) return;
- if(isp->requests == orp){
- isp->requests = orp->next_request; /* unlink head */
- }
- else{
- for(rp = isp->requests; rp; rp = rp->next_request){
- if(rp->next_request == orp){
- rp->next_request = orp->next_request; /* unlink element */
- break;
- }
- }
- }
- if (orp->pdu != NULL){
- snmp_free_pdu(orp->pdu);
- }
- free((char *)orp);
-}
-#endif /***/
-/*
- * Free each element in the input request list.
- */
-static void
-free_request_list(rp)
- struct request_list *rp;
{
struct request_list *orp;
- while(rp){
+ while (rp) {
orp = rp;
rp = rp->next_request;
if (orp->pdu != NULL)
snmp_free_pdu(orp->pdu);
- free((char *)orp);
+ free((char *) orp);
}
}
* dequeues any pending requests, and closes any sockets allocated for
* the session. Returns 0 on error, 1 otherwise.
*/
-int
+int
snmp_close(session)
- struct snmp_session *session;
+ struct snmp_session *session;
{
struct session_list *slp = NULL, *oslp = NULL;
- if (Sessions->session == session){ /* If first entry */
+ if (Sessions->session == session) { /* If first entry */
slp = Sessions;
Sessions = slp->next;
} else {
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
- if (oslp) /* if we found entry that points here */
+ for (slp = Sessions; slp; slp = slp->next) {
+ if (slp->session == session) {
+ if (oslp) /* if we found entry that points here */
oslp->next = slp->next; /* link around this entry */
break;
}
}
}
/* If we found the session, free all data associated with it */
- if (slp){
+ if (slp) {
if (slp->session->community != NULL)
- free((char *)slp->session->community);
- if(slp->session->peername != NULL)
- free((char *)slp->session->peername);
- free((char *)slp->session);
+ free((char *) slp->session->community);
+ if (slp->session->peername != NULL)
+ free((char *) slp->session->peername);
+ free((char *) slp->session);
if (slp->internal->sd != -1)
close(slp->internal->sd);
free_request_list(slp->internal->requests);
- free((char *)slp->internal);
- free((char *)slp);
+ free((char *) slp->internal);
+ free((char *) slp);
} else {
snmp_errno = SNMPERR_BAD_SESSION;
return 0;
*/
int
snmp_build(session, pdu, packet, out_length, is_agent)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *packet;
- int *out_length;
- int is_agent;
+ struct snmp_session *session;
+ struct snmp_pdu *pdu;
+ u_char *packet;
+ int *out_length;
+ int is_agent;
{
- u_char buf[PACKET_LENGTH];
- u_char *cp;
+ u_char buf[PACKET_LENGTH];
+ u_char *cp;
struct variable_list *vp;
- int length;
- int totallength;
+ int length;
+ int totallength;
length = *out_length;
cp = packet;
- for(vp = pdu->variables; vp; vp = vp->next_variable){
- cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
+ for (vp = pdu->variables; vp; vp = vp->next_variable) {
+ cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *) vp->val.string, &length);
if (cp == NULL)
return -1;
}
totallength = cp - packet;
length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
+ cp = asn_build_header(buf, &length, (u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
if (cp == NULL)
return -1;
- bcopy((char *)packet, (char *)cp, totallength);
+ bcopy((char *) packet, (char *) cp, totallength);
totallength += cp - buf;
length = *out_length;
- if (pdu->command != TRP_REQ_MSG){
+ if (pdu->command != TRP_REQ_MSG) {
/* request id */
cp = asn_build_int(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->reqid, sizeof(pdu->reqid));
+ (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
+ (long *) &pdu->reqid, sizeof(pdu->reqid));
if (cp == NULL)
return -1;
/* error status */
cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errstat, sizeof(pdu->errstat));
+ (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
+ (long *) &pdu->errstat, sizeof(pdu->errstat));
if (cp == NULL)
return -1;
/* error index */
cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->errindex, sizeof(pdu->errindex));
+ (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
+ (long *) &pdu->errindex, sizeof(pdu->errindex));
if (cp == NULL)
return -1;
- } else { /* this is a trap message */
+ } else { /* this is a trap message */
/* enterprise */
cp = asn_build_objid(packet, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
- (oid *)pdu->enterprise, pdu->enterprise_length);
+ (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
+ (oid *) pdu->enterprise, pdu->enterprise_length);
if (cp == NULL)
return -1;
/* agent-addr */
- cp = asn_build_string(cp, &length, (u_char)IPADDRESS,
- (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
+ cp = asn_build_string(cp, &length, (u_char) IPADDRESS,
+ (u_char *) & pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
if (cp == NULL)
return -1;
/* generic trap */
cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->trap_type, sizeof(pdu->trap_type));
+ (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
+ (long *) &pdu->trap_type, sizeof(pdu->trap_type));
if (cp == NULL)
return -1;
/* specific trap */
cp = asn_build_int(cp, &length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)&pdu->specific_type, sizeof(pdu->specific_type));
+ (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
+ (long *) &pdu->specific_type, sizeof(pdu->specific_type));
if (cp == NULL)
return -1;
/* timestamp */
- cp = asn_build_int(cp, &length, (u_char)TIMETICKS,
- (long *)&pdu->time, sizeof(pdu->time));
+ cp = asn_build_int(cp, &length, (u_char) TIMETICKS,
+ (long *) &pdu->time, sizeof(pdu->time));
if (cp == NULL)
return -1;
}
if (length < totallength)
return -1;
- bcopy((char *)buf, (char *)cp, totallength);
+ bcopy((char *) buf, (char *) cp, totallength);
totallength += cp - packet;
length = PACKET_LENGTH;
- cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
+ cp = asn_build_header(buf, &length, (u_char) pdu->command, totallength);
if (cp == NULL)
return -1;
if (length < totallength)
return -1;
- bcopy((char *)packet, (char *)cp, totallength);
+ bcopy((char *) packet, (char *) cp, totallength);
totallength += cp - buf;
length = *out_length;
- cp = snmp_auth_build( packet, &length, session, is_agent, totallength );
+ cp = snmp_auth_build(packet, &length, session, is_agent, totallength);
if (cp == NULL)
return -1;
if ((*out_length - (cp - packet)) < totallength)
return -1;
- bcopy((char *)buf, (char *)cp, totallength);
+ bcopy((char *) buf, (char *) cp, totallength);
totallength += cp - packet;
*out_length = totallength;
- if( session->qoS & USEC_QOS_AUTH )
- md5Digest( packet, totallength, cp - (session->contextLen + 16),
- cp - (session->contextLen + 16) );
+ if (session->qoS & USEC_QOS_AUTH)
+ md5Digest(packet, totallength, cp - (session->contextLen + 16),
+ cp - (session->contextLen + 16));
return 0;
}
*/
static int
snmp_parse(session, pdu, data, length)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
- u_char *data;
- int length;
+ struct snmp_session *session;
+ struct snmp_pdu *pdu;
+ u_char *data;
+ int length;
{
- u_char msg_type;
- u_char type;
- u_char *var_val;
- long version;
- int len, four;
+ u_char msg_type;
+ u_char type;
+ u_char *var_val;
+ long version;
+ int len, four;
u_char community[256];
int community_length = 256;
struct variable_list *vp = 0;
- oid objid[MAX_NAME_LEN], *op;
- u_char *origdata = data;
- int origlength = length;
- int ret = 0;
- u_char *save_data;
+ oid objid[MAX_NAME_LEN], *op;
+ u_char *origdata = data;
+ int origlength = length;
+ int ret = 0;
+ u_char *save_data;
/* authenticates message and returns length if valid */
data = snmp_auth_parse(data, &length, community, &community_length, &version);
if (data == NULL)
return -1;
- if( version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2 ) {
- fprintf(stderr, "Wrong version: %ld\n", version);
- return -1;
+ if (version != SNMP_VERSION_1 && version != SNMP_VERSION_2C && version != SNMP_VERSION_2) {
+ fprintf(stderr, "Wrong version: %ld\n", version);
+ return -1;
}
-
save_data = data;
data = asn_parse_header(data, &length, &msg_type);
return -1;
pdu->command = msg_type;
- if( session->authenticator ) {
- ret = session->authenticator( origdata, origlength, save_data - community_length,
- community_length, session, pdu );
- if( ret < 0 ) return ret;
+ if (session->authenticator) {
+ ret = session->authenticator(origdata, origlength, save_data - community_length,
+ community_length, session, pdu);
+ if (ret < 0)
+ return ret;
}
-
- if (pdu->command != TRP_REQ_MSG){
- data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
+ if (pdu->command != TRP_REQ_MSG) {
+ data = asn_parse_int(data, &length, &type, (long *) &pdu->reqid, sizeof(pdu->reqid));
if (data == NULL)
return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
+ data = asn_parse_int(data, &length, &type, (long *) &pdu->errstat, sizeof(pdu->errstat));
if (data == NULL)
return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
+ data = asn_parse_int(data, &length, &type, (long *) &pdu->errindex, sizeof(pdu->errindex));
if (data == NULL)
return -1;
} else {
data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
if (data == NULL)
return -1;
- pdu->enterprise = (oid *)calloc(1, pdu->enterprise_length * sizeof(oid));
- bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
+ pdu->enterprise = (oid *) calloc(1, pdu->enterprise_length * sizeof(oid));
+ bcopy((char *) objid, (char *) pdu->enterprise, pdu->enterprise_length * sizeof(oid));
four = 4;
- data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
+ data = asn_parse_string(data, &length, &type, (u_char *) & pdu->agent_addr.sin_addr.s_addr, &four);
if (data == NULL)
return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
+ data = asn_parse_int(data, &length, &type, (long *) &pdu->trap_type, sizeof(pdu->trap_type));
if (data == NULL)
return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
+ data = asn_parse_int(data, &length, &type, (long *) &pdu->specific_type, sizeof(pdu->specific_type));
if (data == NULL)
return -1;
- data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
+ data = asn_parse_int(data, &length, &type, (long *) &pdu->time, sizeof(pdu->time));
if (data == NULL)
return -1;
}
data = asn_parse_header(data, &length, &type);
if (data == NULL)
return -1;
- if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
+ if (type != (u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR))
return -1;
- while((int)length > 0){
- if (pdu->variables == NULL){
- pdu->variables = vp = (struct variable_list *)calloc(1, sizeof(struct variable_list));
+ while ((int) length > 0) {
+ if (pdu->variables == NULL) {
+ pdu->variables = vp = (struct variable_list *) calloc(1, sizeof(struct variable_list));
} else {
- vp->next_variable = (struct variable_list *)calloc(1, sizeof(struct variable_list));
+ vp->next_variable = (struct variable_list *) calloc(1, sizeof(struct variable_list));
vp = vp->next_variable;
}
vp->next_variable = NULL;
vp->val.string = NULL;
vp->name = NULL;
vp->name_length = MAX_NAME_LEN;
- data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
+ data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *) &length);
if (data == NULL)
return -1;
- op = (oid *)calloc(1, (unsigned)vp->name_length * sizeof(oid));
- bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
+ op = (oid *) calloc(1, (unsigned) vp->name_length * sizeof(oid));
+ bcopy((char *) objid, (char *) op, vp->name_length * sizeof(oid));
vp->name = op;
len = PACKET_LENGTH;
- switch((short)vp->type){
- case ASN_INTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(long));
- vp->val_len = sizeof(long);
- asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER:
- case GAUGE:
- case TIMETICKS:
- case UINTEGER:
- vp->val.integer = (long *)calloc(1, sizeof(unsigned long));
- vp->val_len = sizeof(unsigned long);
- asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *)vp->val.integer, sizeof(vp->val.integer));
- break;
- case COUNTER64:
- vp->val.counter64 = (struct counter64 *)calloc(1, sizeof(struct counter64) );
- vp->val_len = sizeof(struct counter64);
- asn_parse_unsigned_int64(var_val, &len, &vp->type,
- (struct counter64 *)vp->val.counter64,
- sizeof(*vp->val.counter64));
- break;
- case ASN_OCTET_STR:
- case IPADDRESS:
- case OPAQUE:
- case NSAP:
- vp->val.string = (u_char *)calloc(1, (unsigned)vp->val_len);
- asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
- break;
- case ASN_OBJECT_ID:
- vp->val_len = MAX_NAME_LEN;
- asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
- vp->val_len *= sizeof(oid);
- vp->val.objid = (oid *)calloc(1, (unsigned)vp->val_len);
- bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
- break;
- case SNMP_NOSUCHOBJECT:
- case SNMP_NOSUCHINSTANCE:
- case SNMP_ENDOFMIBVIEW:
- case ASN_NULL:
- break;
- default:
- fprintf(stderr, "bad type returned (%x)\n", vp->type);
- break;
+ switch ((short) vp->type) {
+ case ASN_INTEGER:
+ vp->val.integer = (long *) calloc(1, sizeof(long));
+ vp->val_len = sizeof(long);
+ asn_parse_int(var_val, &len, &vp->type, (long *) vp->val.integer, sizeof(vp->val.integer));
+ break;
+ case COUNTER:
+ case GAUGE:
+ case TIMETICKS:
+ case UINTEGER:
+ vp->val.integer = (long *) calloc(1, sizeof(unsigned long));
+ vp->val_len = sizeof(unsigned long);
+ asn_parse_unsigned_int(var_val, &len, &vp->type, (unsigned long *) vp->val.integer, sizeof(vp->val.integer));
+ break;
+ case COUNTER64:
+ vp->val.counter64 = (struct counter64 *) calloc(1, sizeof(struct counter64));
+ vp->val_len = sizeof(struct counter64);
+ asn_parse_unsigned_int64(var_val, &len, &vp->type,
+ (struct counter64 *) vp->val.counter64,
+ sizeof(*vp->val.counter64));
+ break;
+ case ASN_OCTET_STR:
+ case IPADDRESS:
+ case OPAQUE:
+ case NSAP:
+ vp->val.string = (u_char *) calloc(1, (unsigned) vp->val_len);
+ asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
+ break;
+ case ASN_OBJECT_ID:
+ vp->val_len = MAX_NAME_LEN;
+ asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
+ vp->val_len *= sizeof(oid);
+ vp->val.objid = (oid *) calloc(1, (unsigned) vp->val_len);
+ bcopy((char *) objid, (char *) vp->val.objid, vp->val_len);
+ break;
+ case SNMP_NOSUCHOBJECT:
+ case SNMP_NOSUCHINSTANCE:
+ case SNMP_ENDOFMIBVIEW:
+ case ASN_NULL:
+ break;
+ default:
+ fprintf(stderr, "bad type returned (%x)\n", vp->type);
+ break;
}
}
return ret;
*/
int
snmp_send(session, pdu)
- struct snmp_session *session;
- struct snmp_pdu *pdu;
+ struct snmp_session *session;
+ struct snmp_pdu *pdu;
{
struct session_list *slp;
struct snmp_internal_session *isp = NULL;
- u_char packet[PACKET_LENGTH];
+ u_char packet[PACKET_LENGTH];
int length = PACKET_LENGTH;
struct request_list *rp;
struct timeval tv;
- for(slp = Sessions; slp; slp = slp->next){
- if (slp->session == session){
+ for (slp = Sessions; slp; slp = slp->next) {
+ if (slp->session == session) {
isp = slp->internal;
break;
}
}
- if (! pdu) {
+ if (!pdu) {
snmp_errno = SNMPERR_GENERR;
return 0;
}
-
- if (isp == NULL){
+ if (isp == NULL) {
snmp_errno = SNMPERR_BAD_SESSION;
return 0;
}
if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
- || pdu->command == GETBULK_REQ_MSG ){
+ || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG
+ || pdu->command == GETBULK_REQ_MSG) {
if (pdu->reqid == SNMP_DEFAULT_REQID)
pdu->reqid = ++Reqid;
if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
pdu->errindex = 0;
} else {
/* fill in trap defaults */
- pdu->reqid = 1; /* give a bogus non-error reqid for traps */
- if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
- pdu->enterprise = (oid *)calloc(1, sizeof(DEFAULT_ENTERPRISE));
- bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
- pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
+ pdu->reqid = 1; /* give a bogus non-error reqid for traps */
+ if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH) {
+ pdu->enterprise = (oid *) calloc(1, sizeof(DEFAULT_ENTERPRISE));
+ bcopy((char *) DEFAULT_ENTERPRISE, (char *) pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
+ pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE) / sizeof(oid);
}
if (pdu->time == SNMP_DEFAULT_TIME)
pdu->time = DEFAULT_TIME;
}
- if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
- if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
- bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
+ if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS) {
+ if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS) {
+ bcopy((char *) &isp->addr, (char *) &pdu->address, sizeof(pdu->address));
} else {
fprintf(stderr, "No remote IP address specified\n");
snmp_errno = SNMPERR_BAD_ADDRESS;
return 0;
}
}
-
-
- if (snmp_build(session, pdu, packet, &length, 0) < 0){
+ if (snmp_build(session, pdu, packet, &length, 0) < 0) {
fprintf(stderr, "Error building packet\n");
snmp_errno = SNMPERR_GENERR;
return 0;
}
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, pdu->address, 1);
+ if (snmp_dump_packet) {
+ snmp_print_packet(packet, length, pdu->address, 1);
}
-#endif /***/
-
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
+ gettimeofday(&tv, (struct timezone *) 0);
+ if (sendto(isp->sd, (char *) packet, length, 0, (struct sockaddr *) &pdu->address, sizeof(pdu->address)) < 0) {
perror("sendto");
snmp_errno = SNMPERR_GENERR;
return 0;
}
- if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
- || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG ){
+ if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
+ || pdu->command == SET_REQ_MSG || pdu->command == GETBULK_REQ_MSG) {
/* set up to expect a response */
- rp = (struct request_list *)calloc(1, sizeof(struct request_list));
-#if 1 /***/
- if(! rp){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return 0;
- }
-#endif /***/
+ rp = (struct request_list *) calloc(1, sizeof(struct request_list));
+
+ if (!rp) {
+ fprintf(stderr, "Out of memory!\n");
+ snmp_errno = SNMPERR_GENERR;
+ return 0;
+ }
rp->next_request = isp->requests;
isp->requests = rp;
rp->pdu = pdu;
* Frees the pdu and any malloc'd data associated with it.
*/
void
-snmp_free_pdu(struct snmp_pdu * pdu)
+snmp_free_pdu(struct snmp_pdu *pdu)
{
struct variable_list *vp, *ovp;
- if (! pdu)
- return;
+ if (!pdu)
+ return;
vp = pdu->variables;
- while(vp){
- if (vp->name) {
- free((char *)vp->name);
- }
- if (vp->val.string) {
- free((char *)vp->val.string);
- }
- ovp = vp;
- vp = vp->next_variable;
- free((char *)ovp);
+ while (vp) {
+ if (vp->name) {
+ free((char *) vp->name);
+ }
+ if (vp->val.string) {
+ free((char *) vp->val.string);
+ }
+ ovp = vp;
+ vp = vp->next_variable;
+ free((char *) ovp);
}
if (pdu->enterprise) {
- free((char *)pdu->enterprise);
+ free((char *) pdu->enterprise);
}
- free((char *)pdu);
+ free((char *) pdu);
}
*/
void
snmp_read(fdset)
- fd_set *fdset;
+ fd_set *fdset;
{
struct session_list *slp;
struct snmp_session *sp;
struct snmp_internal_session *isp;
u_char packet[PACKET_LENGTH];
- struct sockaddr_in from;
+ struct sockaddr_in from;
ssize_t length, fromlength;
struct snmp_pdu *pdu;
struct request_list *rp /**, *orp **/ ;
- for(slp = Sessions; slp; slp = slp->next){
- if (FD_ISSET(slp->internal->sd, fdset)){
+ for (slp = Sessions; slp; slp = slp->next) {
+ if (FD_ISSET(slp->internal->sd, fdset)) {
sp = slp->session;
isp = slp->internal;
fromlength = sizeof(from);
- length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
+ length = recvfrom(isp->sd, (char *) packet, PACKET_LENGTH, 0, (struct sockaddr *) &from, &fromlength);
if (length == -1) {
perror("recvfrom");
return;
}
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, from, 0);
+ if (snmp_dump_packet) {
+ snmp_print_packet(packet, length, from, 0);
}
- pdu = (struct snmp_pdu *)calloc(1, sizeof(struct snmp_pdu));
+ pdu = (struct snmp_pdu *) calloc(1, sizeof(struct snmp_pdu));
- if(! pdu){
- fprintf(stderr, "Out of memory!\n");
- snmp_errno = SNMPERR_GENERR;
- return;
+ if (!pdu) {
+ fprintf(stderr, "Out of memory!\n");
+ snmp_errno = SNMPERR_GENERR;
+ return;
}
-#endif /***/
-
pdu->address = from;
pdu->reqid = 0;
pdu->variables = NULL;
pdu->enterprise = NULL;
pdu->enterprise_length = 0;
- if (snmp_parse(sp, pdu, packet, length) < 0){
+ if (snmp_parse(sp, pdu, packet, length) < 0) {
fprintf(stderr, "Mangled packet\n");
snmp_free_pdu(pdu);
return;
}
+ if (pdu->command == GET_RSP_MSG || pdu->command == REPORT_MSG) {
- if (pdu->command == GET_RSP_MSG || pdu->command == REPORT_MSG){
-#if 1 /***/ /* bug fix: illegal re-use of rp killed some requests */
- struct request_list *rp_next= 0;
- for(rp = isp->requests; rp; rp = rp_next){
- rp_next = rp->next_request;
- if (rp->request_id == pdu->reqid){
+ struct request_list *rp_next = 0;
+ for (rp = isp->requests; rp; rp = rp_next) {
+ rp_next = rp->next_request;
+ if (rp->request_id == pdu->reqid) {
#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_RECV);
+ snmp_print_trace(slp, rp, TRACE_RECV);
#endif
- if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1){
- /* successful, so delete request */
- free_one_request(isp, rp);
- break; /* no more request with the same reqid */
- }
+ if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1) {
+ /* successful, so delete request */
+ free_one_request(isp, rp);
+ break; /* no more request with the same reqid */
+ }
+ }
}
- }
-#endif /***/
- } else if (pdu->command == GET_REQ_MSG
+ } else if (pdu->command == GET_REQ_MSG
|| pdu->command == GETNEXT_REQ_MSG
|| pdu->command == GETBULK_REQ_MSG
- || pdu->command == TRP_REQ_MSG || pdu->command == SET_REQ_MSG){
+ || pdu->command == TRP_REQ_MSG || pdu->command == SET_REQ_MSG) {
#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, NULL, TRACE_RECV);
+ snmp_print_trace(slp, NULL, TRACE_RECV);
#endif
- sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic);
+ sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic);
}
snmp_free_pdu(pdu);
}
*/
int
snmp_select_info(numfds, fdset, timeout, block)
- int *numfds;
- fd_set *fdset;
- struct timeval *timeout;
- int *block; /* should the select block until input arrives (i.e. no input) */
+ int *numfds;
+ fd_set *fdset;
+ struct timeval *timeout;
+ int *block; /* should the select block until input arrives (i.e. no input) */
{
struct session_list *slp;
struct snmp_internal_session *isp;
* For each request outstanding, add it's socket to the fdset,
* and if it is the earliest timeout to expire, mark it as lowest.
*/
- for(slp = Sessions; slp; slp = slp->next){
+ for (slp = Sessions; slp; slp = slp->next) {
active++;
isp = slp->internal;
if ((isp->sd + 1) > *numfds)
*numfds = (isp->sd + 1);
FD_SET(isp->sd, fdset);
- if (isp->requests){
+ if (isp->requests) {
/* found another session with outstanding requests */
requests++;
- for(rp = isp->requests; rp; rp = rp->next_request){
+ for (rp = isp->requests; rp; rp = rp->next_request) {
if (!timerisset(&earliest) || timercmp(&rp->expire, &earliest, <))
earliest = rp->expire;
}
}
}
- if (requests == 0) /* if none are active, skip arithmetic */
+ if (requests == 0) /* if none are active, skip arithmetic */
return active;
/*
* transforms earliest from an absolute time into a delta time, the
* time left until the select should timeout.
*/
- gettimeofday(&now, (struct timezone *)0);
- earliest.tv_sec--; /* adjust time to make arithmetic easier */
+ gettimeofday(&now, (struct timezone *) 0);
+ earliest.tv_sec--; /* adjust time to make arithmetic easier */
earliest.tv_usec += 1000000L;
earliest.tv_sec -= now.tv_sec;
earliest.tv_usec -= now.tv_usec;
- while (earliest.tv_usec >= 1000000L){
+ while (earliest.tv_usec >= 1000000L) {
earliest.tv_usec -= 1000000L;
earliest.tv_sec += 1;
}
- if (earliest.tv_sec < 0){
+ if (earliest.tv_sec < 0) {
earliest.tv_sec = 0;
earliest.tv_usec = 0;
}
-
/* if it was blocking before or our delta time is less, reset timeout */
- if (*block == 1 || timercmp(&earliest, timeout, <)){
+ if (*block == 1 || timercmp(&earliest, timeout, <)) {
*timeout = earliest;
*block = 0;
}
struct session_list *slp;
struct snmp_session *sp;
struct snmp_internal_session *isp;
-#if 1 /***/ /* replacing freeme by simpler and safer rp_next*/
struct request_list *rp, *rp_next = 0;
-#endif /***/
struct timeval now;
- gettimeofday(&now, (struct timezone *)0);
+ gettimeofday(&now, (struct timezone *) 0);
/*
* For each request outstanding, check to see if it has expired.
*/
- for(slp = Sessions; slp; slp = slp->next){
+ for (slp = Sessions; slp; slp = slp->next) {
sp = slp->session;
isp = slp->internal;
-#if 1 /***/ /* simplification */
- for(rp = isp->requests; rp; rp = rp_next){
+ for (rp = isp->requests; rp; rp = rp_next) {
rp_next = rp->next_request;
- if (timercmp(&rp->expire, &now, <)){
+ if (timercmp(&rp->expire, &now, <)) {
/* this timer has expired */
- if (rp->retries >= sp->retries){
+ if (rp->retries >= sp->retries) {
#if DEBUG_SNMPTRACE
- snmp_print_trace(slp, rp, TRACE_TIMEOUT);
+ snmp_print_trace(slp, rp, TRACE_TIMEOUT);
#endif
- /* No more chances, delete this entry */
- sp->callback(TIMED_OUT, sp, rp->pdu->reqid, rp->pdu, sp->callback_magic);
- free_one_request(isp, rp);
- continue;
-#endif /***/
+ /* No more chances, delete this entry */
+ sp->callback(TIMED_OUT, sp, rp->pdu->reqid, rp->pdu, sp->callback_magic);
+ free_one_request(isp, rp);
+ continue;
} else {
- u_char packet[PACKET_LENGTH];
+ u_char packet[PACKET_LENGTH];
int length = PACKET_LENGTH;
struct timeval tv;
/* retransmit this pdu */
rp->retries++;
rp->timeout <<= 1;
- if (snmp_build(sp, rp->pdu, packet, &length, 0) < 0){
+ if (snmp_build(sp, rp->pdu, packet, &length, 0) < 0) {
fprintf(stderr, "Error building packet\n");
}
-#if 1 /***/
- if (snmp_dump_packet){
- snmp_print_packet(packet, length, rp->pdu->address, 1);
+ if (snmp_dump_packet) {
+ snmp_print_packet(packet, length, rp->pdu->address, 1);
}
-#endif /***/
- gettimeofday(&tv, (struct timezone *)0);
- if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&rp->pdu->address, sizeof(rp->pdu->address)) < 0){
+ gettimeofday(&tv, (struct timezone *) 0);
+ if (sendto(isp->sd, (char *) packet, length, 0, (struct sockaddr *) &rp->pdu->address, sizeof(rp->pdu->address)) < 0) {
perror("sendto");
}
rp->time = tv;
#endif
}
}
-#if 1 /***/ /* simplification */
}
-#endif /***/
}
}
projects / thirdparty / squid.git / commitdiff
