pimd/test_igmpv3_join.c

   1 /*
   2   PIM for Quagga
   3   Copyright (C) 2008  Everton da Silva Marques
   4
   5   This program is free software; you can redistribute it and/or modify
   6   it under the terms of the GNU General Public License as published by
   7   the Free Software Foundation; either version 2 of the License, or
   8   (at your option) any later version.
   9
  10   This program is distributed in the hope that it will be useful, but
  11   WITHOUT ANY WARRANTY; without even the implied warranty of
  12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13   General Public License for more details.
  14
  15   You should have received a copy of the GNU General Public License
  16   along with this program; see the file COPYING; if not, write to the
  17   Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  18   MA 02110-1301 USA
  19 */
  20
  21 #include <zebra.h>
  22
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <errno.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28 #include <sys/types.h>
  29 #include <sys/socket.h>
  30 #include <net/if.h>
  31 #include <arpa/inet.h>
  32
  33 #include "if.h"
  34 #include "pim_igmp_join.h"
  35
  36 const char *prog_name = 0;
  37
  38 static int iface_solve_index(const char *ifname)
  39 {
  40   struct if_nameindex *ini;
  41   ifindex_t ifindex = -1;
  42   int i;
  43
  44   if (!ifname)
  45     return -1;
  46
  47   ini = if_nameindex();
  48   if (!ini) {
  49     int err = errno;
  50     fprintf(stderr,
  51             "%s: interface=%s: failure solving index: errno=%d: %s\n",
  52             prog_name, ifname, err, strerror(err));
  53     errno = err;
  54     return -1;
  55   }
  56
  57   for (i = 0; ini[i].if_index; ++i) {
  58 #if 0
  59     fprintf(stderr,
  60             "%s: interface=%s matching against local ifname=%s ifindex=%d\n",
  61             prog_name, ifname, ini[i].if_name, ini[i].if_index);
  62 #endif
  63     if (!strcmp(ini[i].if_name, ifname)) {
  64       ifindex = ini[i].if_index;
  65       break;
  66     }
  67   }
  68
  69   if_freenameindex(ini);
  70
  71   return ifindex;
  72 }
  73
  74 int main(int argc, const char *argv[])
  75 {
  76   struct in_addr group_addr;
  77   struct in_addr source_addr;
  78   const char *ifname;
  79   const char *group;
  80   const char *source;
  81   ifindex_t ifindex;
  82   int result;
  83   int fd;
  84
  85   prog_name = argv[0];
  86
  87   fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
  88   if (fd < 0) {
  89     fprintf(stderr,
  90             "%s: could not create socket: socket(): errno=%d: %s\n",
  91             prog_name, errno, strerror(errno));
  92     exit(1);
  93   }
  94
  95   if (argc != 4) {
  96     fprintf(stderr,
  97             "usage:   %s interface group     source\n"
  98             "example: %s eth0      232.1.1.1 1.1.1.1\n",
  99             prog_name, prog_name);
 100     exit(1);
 101   }
 102
 103   ifname = argv[1];
 104   group  = argv[2];
 105   source = argv[3];
 106
 107   ifindex = iface_solve_index(ifname);
 108   if (ifindex < 0) {
 109     fprintf(stderr, "%s: could not find interface: %s\n",
 110             prog_name, ifname);
 111     exit(1);
 112   }
 113
 114   result = inet_pton(AF_INET, group, &group_addr);
 115   if (result <= 0) {
 116     fprintf(stderr, "%s: bad group address: %s\n",
 117             prog_name, group);
 118     exit(1);
 119   }
 120
 121   result = inet_pton(AF_INET, source, &source_addr);
 122   if (result <= 0) {
 123     fprintf(stderr, "%s: bad source address: %s\n",
 124             prog_name, source);
 125     exit(1);
 126   }
 127
 128   result = pim_igmp_join_source(fd, ifindex, group_addr, source_addr);
 129   if (result) {
 130     fprintf(stderr,
 131             "%s: setsockopt(fd=%d) failure for IGMP group %s source %s ifindex %d on interface %s: errno=%d: %s\n",
 132             prog_name, fd, group, source, ifindex, ifname,
 133             errno, strerror(errno));
 134     exit(1);
 135   }
 136
 137   printf("%s: joined channel (S,G)=(%s,%s) on interface %s\n",
 138          prog_name, source, group, ifname);
 139
 140   printf("%s: waiting...\n", prog_name);
 141
 142   getchar();
 143
 144   close(fd);
 145
 146   printf("%s: left channel (S,G)=(%s,%s) on interface %s\n",
 147          prog_name, source, group, ifname);
 148
 149   exit(0);
 150 }