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
  21 #ifndef PIM_IGMP_JOIN_H
  22 #define PIM_IGMP_JOIN_H
  23
  24 /* required headers #include'd by caller */
  25
  26 #ifndef SOL_IP
  27 #define SOL_IP IPPROTO_IP
  28 #endif
  29
  30 #ifndef MCAST_JOIN_SOURCE_GROUP
  31 #define MCAST_JOIN_SOURCE_GROUP 46
  32 struct group_source_req
  33 {
  34   uint32_t gsr_interface;
  35   struct sockaddr_storage gsr_group;
  36   struct sockaddr_storage gsr_source;
  37 };
  38 #endif
  39
  40 static int pim_igmp_join_source(int fd, ifindex_t ifindex,
  41                                 struct in_addr group_addr,
  42                                 struct in_addr source_addr)
  43 {
  44   struct group_source_req req;
  45   struct sockaddr_in group;
  46   struct sockaddr_in source;
  47
  48   memset(&req, 0, sizeof(req));
  49   memset(&group, 0, sizeof(group));
  50   group.sin_family = AF_INET;
  51   group.sin_addr = group_addr;
  52   group.sin_port = htons(0);
  53   memcpy(&req.gsr_group, &group, sizeof(struct sockaddr_in));
  54
  55   memset(&source, 0, sizeof(source));
  56   source.sin_family = AF_INET;
  57   source.sin_addr = source_addr;
  58   source.sin_port = htons(0);
  59   memcpy(&req.gsr_source, &source, sizeof(struct sockaddr_in));
  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 }
  68
  69 #endif /* PIM_IGMP_JOIN_H */