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
  22 #include <zebra.h>
  23
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #include <errno.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29 #include <sys/types.h>
  30 #include <sys/socket.h>
  31 #include <net/if.h>
  32 #include <arpa/inet.h>
  33
  34 #include "if.h"
  35 #include "pim_igmp_join.h"
  36
  37 const char *prog_name = 0;
  38
  39 static int iface_solve_index(const char *ifname)
  40 {
  41   struct if_nameindex *ini;
  42   ifindex_t ifindex = -1;
  43   int i;
  44
  45   if (!ifname)
  46     return -1;
  47
  48   ini = if_nameindex();
  49   if (!ini) {
  50     int err = errno;
  51     fprintf(stderr,
  52             "%s: interface=%s: failure solving index: errno=%d: %s\n",
  53             prog_name, ifname, err, strerror(err));
  54     errno = err;
  55     return -1;
  56   }
  57
  58   for (i = 0; ini[i].if_index; ++i) {
  59 #if 0
  60     fprintf(stderr,
  61             "%s: interface=%s matching against local ifname=%s ifindex=%d\n",
  62             prog_name, ifname, ini[i].if_name, ini[i].if_index);
  63 #endif
  64     if (!strcmp(ini[i].if_name, ifname)) {
  65       ifindex = ini[i].if_index;
  66       break;
  67     }
  68   }
  69
  70   if_freenameindex(ini);
  71
  72   return ifindex;
  73 }
  74
  75 int main(int argc, const char *argv[])
  76 {
  77   struct in_addr group_addr;
  78   struct in_addr source_addr;
  79   const char *ifname;
  80   const char *group;
  81   const char *source;
  82   ifindex_t ifindex;
  83   int result;
  84   int fd;
  85
  86   prog_name = argv[0];
  87
  88   fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
  89   if (fd < 0) {
  90     fprintf(stderr,
  91             "%s: could not create socket: socket(): errno=%d: %s\n",
  92             prog_name, errno, strerror(errno));
  93     exit(1);
  94   }
  95
  96   if (argc != 4) {
  97     fprintf(stderr,
  98             "usage:   %s interface group     source\n"
  99             "example: %s eth0      232.1.1.1 1.1.1.1\n",
 100             prog_name, prog_name);
 101     exit(1);
 102   }
 103
 104   ifname = argv[1];
 105   group  = argv[2];
 106   source = argv[3];
 107
 108   ifindex = iface_solve_index(ifname);
 109   if (ifindex < 0) {
 110     fprintf(stderr, "%s: could not find interface: %s\n",
 111             prog_name, ifname);
 112     exit(1);
 113   }
 114
 115   result = inet_pton(AF_INET, group, &group_addr);
 116   if (result <= 0) {
 117     fprintf(stderr, "%s: bad group address: %s\n",
 118             prog_name, group);
 119     exit(1);
 120   }
 121
 122   result = inet_pton(AF_INET, source, &source_addr);
 123   if (result <= 0) {
 124     fprintf(stderr, "%s: bad source address: %s\n",
 125             prog_name, source);
 126     exit(1);
 127   }
 128
 129   result = pim_igmp_join_source(fd, ifindex, group_addr, source_addr);
 130   if (result) {
 131     fprintf(stderr,
 132             "%s: setsockopt(fd=%d) failure for IGMP group %s source %s ifindex %d on interface %s: errno=%d: %s\n",
 133             prog_name, fd, group, source, ifindex, ifname,
 134             errno, strerror(errno));
 135     exit(1);
 136   }
 137
 138   printf("%s: joined channel (S,G)=(%s,%s) on interface %s\n",
 139          prog_name, source, group, ifname);
 140
 141   printf("%s: waiting...\n", prog_name);
 142
 143   getchar();
 144
 145   close(fd);
 146
 147   printf("%s: left channel (S,G)=(%s,%s) on interface %s\n",
 148          prog_name, source, group, ifname);
 149
 150   exit(0);
 151 }