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