pimd/pim_igmp_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   $QuaggaId: $Format:%an, %ai, %h$ $
  21 */
  22
  23 #include <sys/types.h>
  24 #include <sys/socket.h>
  25 #include <string.h>
  26
  27 #include "pim_igmp_join.h"
  28
  29 #ifndef SOL_IP
  30 #define SOL_IP IPPROTO_IP
  31 #endif
  32
  33 #ifndef MCAST_JOIN_SOURCE_GROUP
  34 #define MCAST_JOIN_SOURCE_GROUP 46
  35 struct group_source_req
  36 {
  37   uint32_t gsr_interface;
  38   struct sockaddr_storage gsr_group;
  39   struct sockaddr_storage gsr_source;
  40 };
  41 #endif
  42
  43 int pim_igmp_join_source(int fd, int ifindex,
  44                          struct in_addr group_addr,
  45                          struct in_addr source_addr)
  46 {
  47   struct group_source_req req;
  48   struct sockaddr_in *group_sa = (struct sockaddr_in *) &req.gsr_group;
  49   struct sockaddr_in *source_sa = (struct sockaddr_in *) &req.gsr_source;
  50
  51   memset(group_sa, 0, sizeof(*group_sa));
  52   group_sa->sin_family = AF_INET;
  53   group_sa->sin_addr = group_addr;
  54   group_sa->sin_port = htons(0);
  55
  56   memset(source_sa, 0, sizeof(*source_sa));
  57   source_sa->sin_family = AF_INET;
  58   source_sa->sin_addr = source_addr;
  59   source_sa->sin_port = htons(0);
  60
  61   req.gsr_interface = ifindex;
  62
  63   return setsockopt(fd, SOL_IP, MCAST_JOIN_SOURCE_GROUP,
  64                     &req, sizeof(req));
  65
  66   return 0;
  67 }