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151 lines
3.5 KiB
C
151 lines
3.5 KiB
C
/*
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* PIM for Quagga
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* Copyright (C) 2008 Everton da Silva Marques
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <zebra.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <arpa/inet.h>
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#include "if.h"
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#include "pim_igmp_join.h"
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const char *prog_name = 0;
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static int iface_solve_index(const char *ifname)
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{
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struct if_nameindex *ini;
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ifindex_t ifindex = -1;
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int i;
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if (!ifname)
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return -1;
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ini = if_nameindex();
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if (!ini) {
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int err = errno;
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fprintf(stderr,
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"%s: interface=%s: failure solving index: errno=%d: %s\n",
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prog_name, ifname, err, strerror(err));
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errno = err;
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return -1;
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}
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for (i = 0; ini[i].if_index; ++i) {
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#if 0
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fprintf(stderr,
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"%s: interface=%s matching against local ifname=%s ifindex=%d\n",
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prog_name, ifname, ini[i].if_name, ini[i].if_index);
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#endif
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if (!strcmp(ini[i].if_name, ifname)) {
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ifindex = ini[i].if_index;
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break;
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}
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}
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if_freenameindex(ini);
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return ifindex;
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}
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int main(int argc, const char *argv[])
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{
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struct in_addr group_addr;
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struct in_addr source_addr;
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const char *ifname;
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const char *group;
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const char *source;
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ifindex_t ifindex;
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int result;
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int fd;
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prog_name = argv[0];
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fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if (fd < 0) {
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fprintf(stderr,
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"%s: could not create socket: socket(): errno=%d: %s\n",
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prog_name, errno, strerror(errno));
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exit(1);
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}
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if (argc != 4) {
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fprintf(stderr,
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"usage: %s interface group source\n"
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"example: %s eth0 232.1.1.1 1.1.1.1\n",
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prog_name, prog_name);
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exit(1);
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}
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ifname = argv[1];
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group = argv[2];
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source = argv[3];
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ifindex = iface_solve_index(ifname);
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if (ifindex < 0) {
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fprintf(stderr, "%s: could not find interface: %s\n", prog_name,
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ifname);
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exit(1);
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}
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result = inet_pton(AF_INET, group, &group_addr);
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if (result <= 0) {
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fprintf(stderr, "%s: bad group address: %s\n", prog_name,
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group);
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exit(1);
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}
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result = inet_pton(AF_INET, source, &source_addr);
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if (result <= 0) {
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fprintf(stderr, "%s: bad source address: %s\n", prog_name,
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source);
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exit(1);
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}
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result = pim_igmp_join_source(fd, ifindex, group_addr, source_addr);
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if (result) {
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fprintf(stderr,
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"%s: setsockopt(fd=%d) failure for IGMP group %s source %s ifindex %d on interface %s: errno=%d: %s\n",
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prog_name, fd, group, source, ifindex, ifname, errno,
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strerror(errno));
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exit(1);
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}
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printf("%s: joined channel (S,G)=(%s,%s) on interface %s\n", prog_name,
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source, group, ifname);
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printf("%s: waiting...\n", prog_name);
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if (getchar() == EOF)
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fprintf(stderr, "getchar failure\n");
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close(fd);
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printf("%s: left channel (S,G)=(%s,%s) on interface %s\n", prog_name,
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source, group, ifname);
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exit(0);
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}
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