lib/snmplib/coexistance.c

   1 /*
   2  * RFC 1908: Coexistence between SNMPv1 and SNMPv2
   3  */
   4 /**********************************************************************
   5  *
   6  *           Copyright 1997 by Carnegie Mellon University
   7  *
   8  *                       All Rights Reserved
   9  *
  10  * Permission to use, copy, modify, and distribute this software and its
  11  * documentation for any purpose and without fee is hereby granted,
  12  * provided that the above copyright notice appear in all copies and that
  13  * both that copyright notice and this permission notice appear in
  14  * supporting documentation, and that the name of CMU not be
  15  * used in advertising or publicity pertaining to distribution of the
  16  * software without specific, written prior permission.
  17  *
  18  * CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  19  * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  20  * CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  21  * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  22  * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  23  * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  24  * SOFTWARE.
  25  *
  26  * Author: Ryan Troll <ryan+@andrew.cmu.edu>
  27  *
  28  **********************************************************************/
  29
  30 #include "squid.h"
  31
  32 #if HAVE_UNISTD_H
  33 #include <unistd.h>
  34 #endif
  35 #if HAVE_STDLIB_H
  36 #include <stdlib.h>
  37 #endif
  38 #if HAVE_SYS_TYPES_H
  39 #include <sys/types.h>
  40 #endif
  41 #if HAVE_CTYPE_H
  42 #include <ctype.h>
  43 #endif
  44 #if HAVE_GNUMALLOC_H
  45 #include <gnumalloc.h>
  46 #elif HAVE_MALLOC_H
  47 #include <malloc.h>
  48 #endif
  49 #if HAVE_MEMORY_H
  50 #include <memory.h>
  51 #endif
  52 #if HAVE_STRING_H
  53 #include <string.h>
  54 #endif
  55 #if HAVE_STRINGS_H
  56 #include <strings.h>
  57 #endif
  58 #if HAVE_BSTRING_H
  59 #include <bstring.h>
  60 #endif
  61 #if HAVE_SYS_SOCKET_H
  62 #include <sys/socket.h>
  63 #endif
  64 #if HAVE_NETINET_IN_H
  65 #include <netinet/in.h>
  66 #endif
  67 #if HAVE_ARPA_INET_H
  68 #include <arpa/inet.h>
  69 #endif
  70 #if HAVE_SYS_TIME_H
  71 #include <sys/time.h>
  72 #endif
  73 #if HAVE_NETDB_H
  74 #include <netdb.h>
  75 #endif
  76
  77 #include "asn1.h"
  78 #include "snmp.h"
  79 #include "snmp_api_error.h"
  80 #include "snmp_error.h"
  81 #include "snmp_pdu.h"
  82 #include "snmp_vars.h"
  83
  84 #include "util.h"
  85
  86 /*
  87  * RFC 1908: Coexistence between SNMPv1 and SNMPv2
  88  *
  89  * These convert:
  90  *
  91  *   V1 PDUs from an ** AGENT **   to V2 PDUs for an ** MANAGER **
  92  *   V2 PDUs from an ** MANAGER ** to V1 PDUs for an ** AGENT **
  93  *
  94  * We will never convert V1 information from a manager into V2 PDUs.  V1
  95  * requests are always honored by V2 agents, and the responses will be
  96  * valid V1 responses.  (I think. XXXXX)
  97  *
  98  */
  99 int
 100 snmp_coexist_V2toV1(struct snmp_pdu *PDU)
 101 {
 102     /* Per 3.1.1:
 103      */
 104     switch (PDU->command) {
 105
 106     case SNMP_PDU_GET:
 107     case SNMP_PDU_GETNEXT:
 108 #if SNMP_PDU_SET
 109     case SNMP_PDU_SET:
 110 #endif
 111         return (1);
 112         break;
 113
 114     case SNMP_PDU_GETBULK:
 115         PDU->non_repeaters = 0;
 116         PDU->max_repetitions = 0;
 117         PDU->command = SNMP_PDU_GETNEXT;
 118         return (1);
 119         break;
 120
 121     default:
 122         snmplib_debug(2, "Unable to translate PDU %d to SNMPv1!\n", PDU->command);
 123         snmp_set_api_error(SNMPERR_PDU_TRANSLATION);
 124         return (0);
 125     }
 126 }