pimd/pim_igmp_join.h

   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 #ifndef PIM_IGMP_JOIN_H
  24 #define PIM_IGMP_JOIN_H
  25
  26 /* required headers #include'd by caller */
  27
  28 #ifndef SOL_IP
  29 #define SOL_IP IPPROTO_IP
  30 #endif
  31
  32 #ifndef MCAST_JOIN_SOURCE_GROUP
  33 #define MCAST_JOIN_SOURCE_GROUP 46
  34 struct group_source_req
  35 {
  36   uint32_t gsr_interface;
  37   struct sockaddr_storage gsr_group;
  38   struct sockaddr_storage gsr_source;
  39 };
  40 #endif
  41
  42 static int pim_igmp_join_source(int fd, ifindex_t ifindex,
  43                                 struct in_addr group_addr,
  44                                 struct in_addr source_addr)
  45 {
  46   struct group_source_req req;
  47   struct sockaddr_in group;
  48   struct sockaddr_in source;
  49
  50   memset(&group, 0, sizeof(group));
  51   group.sin_family = AF_INET;
  52   group.sin_addr = group_addr;
  53   group.sin_port = htons(0);
  54   memcpy(&req.gsr_group, &group, sizeof(struct sockaddr_in));
  55
  56   memset(&source, 0, sizeof(source));
  57   source.sin_family = AF_INET;
  58   source.sin_addr = source_addr;
  59   source.sin_port = htons(0);
  60   memcpy(&req.gsr_source, &source, sizeof(struct sockaddr_in));
  61
  62   req.gsr_interface = ifindex;
  63
  64   return setsockopt(fd, SOL_IP, MCAST_JOIN_SOURCE_GROUP,
  65                     &req, sizeof(req));
  66
  67   return 0;
  68 }
  69
  70 #endif /* PIM_IGMP_JOIN_H */