--- /dev/null
+/* socket.c
+
+ BSD socket interface code... */
+
+/*
+ * Copyright (c) 1995, 1996 The Internet Software Consortium.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of The Internet Software Consortium nor the names
+ * of its contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
+ * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This software has been written for the Internet Software Consortium
+ * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
+ * Enterprises. To learn more about the Internet Software Consortium,
+ * see ``http://www.vix.com/isc''. To learn more about Vixie
+ * Enterprises, see ``http://www.vix.com''.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1995 The Internet Software Consortium. All rights reserved.\n";
+#endif /* not lint */
+
+#include "dhcpd.h"
+#include <sys/ioctl.h>
+
+struct interface_info *interfaces;
+
+/* Use the SIOCGIFCONF ioctl to get a list of all the attached interfaces.
+ For each interface that's of type INET and not the loopback interface,
+ register that interface with the network I/O software, figure out what
+ subnet it's on, and add it to the list of interfaces. */
+
+void get_interface_list ()
+{
+ struct interface_info *tmp;
+ static char buf [8192];
+ struct ifconf ic;
+ int i;
+ int sock;
+ int ifcount = 0;
+ int ifix = 0;
+
+ /* Create an unbound datagram socket to do the SIOCGIFADDR ioctl on. */
+ if ((sock = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
+ error ("Can't create addrlist socket");
+
+ /* Get the interface configuration information... */
+ ic.ifc_len = sizeof buf;
+ ic.ifc_ifcu.ifcu_buf = (caddr_t)buf;
+ i = ioctl(sock, SIOCGIFCONF, &ic);
+ close (sock);
+ if (i < 0)
+ error ("ioctl: SIOCGIFCONF: %m");
+
+ /* Cycle through the list of interfaces looking for IP addresses.
+ Go through twice; once to count the number if addresses, and a
+ second time to copy them into an array of addresses. */
+ for (i = 0; i < ic.ifc_len;) {
+ struct ifreq *ifp = (struct ifreq *)((caddr_t)ic.ifc_req + i);
+#ifdef HAVE_SIN_LEN
+ i += (sizeof ifp -> ifr_name) + ifp -> ifr_addr.sa_len;
+#else
+ i += sizeof *ifp;
+#endif
+ if (ifp -> ifr_addr.sa_family == AF_INET) {
+ struct sockaddr_in *foo =
+ (struct sockaddr_in *)(&ifp -> ifr_addr);
+ /* We don't want the loopback interface. */
+ if (foo -> sin_addr.s_addr == INADDR_LOOPBACK)
+ continue;
+ tmp = ((struct interface_info *)
+ dmalloc (sizeof *tmp, "get_interface_list"));
+ if (!tmp)
+ error ("Insufficient memory to "
+ "record interface");
+ memset (tmp, 0, sizeof *tmp);
+ tmp -> address.len = 4;
+ memcpy (tmp -> address.iabuf, &foo -> sin_addr.s_addr);
+ tmp -> local_subnet = find_subnet (tmp -> address);
+ if_register_send (tmp, ifp);
+ if_register_receive (tmp, ifp);
+ }
+ }
+}
+
+/* Wait for packets to come in using select(). When one does, call
+ receive_packet to receive the packet and possibly strip hardware
+ addressing information from it, and then call do_packet to try to
+ do something with it. */
+
+void dispatch ()
+{
+ struct sockaddr_in from;
+ struct hardware_addr hfrom;
+ struct iaddr ifrom;
+ fd_set r, w, x;
+ struct interface_info *l;
+ int max = 0;
+ int count;
+ int result;
+ static unsigned char packbuf [4095]; /* Packet input buffer.
+ Must be as large as largest
+ possible MTU. */
+
+ FD_ZERO (&r);
+ FD_ZERO (&w);
+ FD_ZERO (&x);
+
+ do {
+ /* Set up the read mask. */
+ for (l = sockets; l; l = l -> next) {
+ FD_SET (l -> sock, &r);
+ FD_SET (l -> sock, &x);
+ if (l -> sock > max)
+ max = l -> sock;
+ }
+
+ /* Wait for a packet or a timeout... XXX */
+ count = select (max + 1, &r, &w, &x, (struct timeval *)0);
+
+ /* Get the current time... */
+ GET_TIME (&cur_time);
+
+ /* Not likely to be transitory... */
+ if (count < 0)
+ error ("select: %m");
+
+ for (l = interfaces; l; l = l -> next) {
+ if (!FD_ISSET (l -> rfdesc, &r))
+ continue;
+ if ((result =
+ receive_packet (l, packbuf, sizeof packbuf,
+ &from, &hfrom)) < 0) {
+ warn ("receive_packet failed on %s: %m",
+ inet_ntoa (l -> addr.sin_addr));
+ continue;
+ }
+ note ("request from %s, port %d",
+ inet_ntoa (from.sin_addr),
+ htons (from.sin_port));
+ ifrom.len = 4;
+ memcpy (ifrom.iabuf, &from.sin_addr, ifrom.len);
+
+ do_packet (l, packbuf, result,
+ from.sin_port, ifrom, hfrom);
+ }
+ } while (1);
+}
+
--- /dev/null
+/* socket.c
+
+ BSD socket interface code... */
+
+/*
+ * Copyright (c) 1995, 1996 The Internet Software Consortium.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of The Internet Software Consortium nor the names
+ * of its contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
+ * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This software has been written for the Internet Software Consortium
+ * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
+ * Enterprises. To learn more about the Internet Software Consortium,
+ * see ``http://www.vix.com/isc''. To learn more about Vixie
+ * Enterprises, see ``http://www.vix.com''.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1995 The Internet Software Consortium. All rights reserved.\n";
+#endif /* not lint */
+
+#include "dhcpd.h"
+#include <sys/ioctl.h>
+
+struct interface_info *interfaces;
+
+/* Use the SIOCGIFCONF ioctl to get a list of all the attached interfaces.
+ For each interface that's of type INET and not the loopback interface,
+ register that interface with the network I/O software, figure out what
+ subnet it's on, and add it to the list of interfaces. */
+
+void get_interface_list ()
+{
+ struct interface_info *tmp;
+ static char buf [8192];
+ struct ifconf ic;
+ int i;
+ int sock;
+ int ifcount = 0;
+ int ifix = 0;
+
+ /* Create an unbound datagram socket to do the SIOCGIFADDR ioctl on. */
+ if ((sock = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
+ error ("Can't create addrlist socket");
+
+ /* Get the interface configuration information... */
+ ic.ifc_len = sizeof buf;
+ ic.ifc_ifcu.ifcu_buf = (caddr_t)buf;
+ i = ioctl(sock, SIOCGIFCONF, &ic);
+ close (sock);
+ if (i < 0)
+ error ("ioctl: SIOCGIFCONF: %m");
+
+ /* Cycle through the list of interfaces looking for IP addresses.
+ Go through twice; once to count the number if addresses, and a
+ second time to copy them into an array of addresses. */
+ for (i = 0; i < ic.ifc_len;) {
+ struct ifreq *ifp = (struct ifreq *)((caddr_t)ic.ifc_req + i);
+#ifdef HAVE_SIN_LEN
+ i += (sizeof ifp -> ifr_name) + ifp -> ifr_addr.sa_len;
+#else
+ i += sizeof *ifp;
+#endif
+ if (ifp -> ifr_addr.sa_family == AF_INET) {
+ struct sockaddr_in *foo =
+ (struct sockaddr_in *)(&ifp -> ifr_addr);
+ /* We don't want the loopback interface. */
+ if (foo -> sin_addr.s_addr == INADDR_LOOPBACK)
+ continue;
+ tmp = ((struct interface_info *)
+ dmalloc (sizeof *tmp, "get_interface_list"));
+ if (!tmp)
+ error ("Insufficient memory to "
+ "record interface");
+ memset (tmp, 0, sizeof *tmp);
+ tmp -> address.len = 4;
+ memcpy (tmp -> address.iabuf, &foo -> sin_addr.s_addr);
+ tmp -> local_subnet = find_subnet (tmp -> address);
+ if_register_send (tmp, ifp);
+ if_register_receive (tmp, ifp);
+ }
+ }
+}
+
+/* Wait for packets to come in using select(). When one does, call
+ receive_packet to receive the packet and possibly strip hardware
+ addressing information from it, and then call do_packet to try to
+ do something with it. */
+
+void dispatch ()
+{
+ struct sockaddr_in from;
+ struct hardware_addr hfrom;
+ struct iaddr ifrom;
+ fd_set r, w, x;
+ struct interface_info *l;
+ int max = 0;
+ int count;
+ int result;
+ static unsigned char packbuf [4095]; /* Packet input buffer.
+ Must be as large as largest
+ possible MTU. */
+
+ FD_ZERO (&r);
+ FD_ZERO (&w);
+ FD_ZERO (&x);
+
+ do {
+ /* Set up the read mask. */
+ for (l = sockets; l; l = l -> next) {
+ FD_SET (l -> sock, &r);
+ FD_SET (l -> sock, &x);
+ if (l -> sock > max)
+ max = l -> sock;
+ }
+
+ /* Wait for a packet or a timeout... XXX */
+ count = select (max + 1, &r, &w, &x, (struct timeval *)0);
+
+ /* Get the current time... */
+ GET_TIME (&cur_time);
+
+ /* Not likely to be transitory... */
+ if (count < 0)
+ error ("select: %m");
+
+ for (l = interfaces; l; l = l -> next) {
+ if (!FD_ISSET (l -> rfdesc, &r))
+ continue;
+ if ((result =
+ receive_packet (l, packbuf, sizeof packbuf,
+ &from, &hfrom)) < 0) {
+ warn ("receive_packet failed on %s: %m",
+ inet_ntoa (l -> addr.sin_addr));
+ continue;
+ }
+ note ("request from %s, port %d",
+ inet_ntoa (from.sin_addr),
+ htons (from.sin_port));
+ ifrom.len = 4;
+ memcpy (ifrom.iabuf, &from.sin_addr, ifrom.len);
+
+ do_packet (l, packbuf, result,
+ from.sin_port, ifrom, hfrom);
+ }
+ } while (1);
+}
+
projects / thirdparty / dhcp.git / commitdiff
