diff options
Diffstat (limited to 'pimd/pim_igmpv3.c')
| -rw-r--r-- | pimd/pim_igmpv3.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/pimd/pim_igmpv3.c b/pimd/pim_igmpv3.c index afa2db5f15..572d3a6aba 100644 --- a/pimd/pim_igmpv3.c +++ b/pimd/pim_igmpv3.c @@ -499,6 +499,21 @@ static void allow(struct igmp_sock *igmp, struct in_addr from, struct igmp_group *group; int i; + if (num_sources == 0) { + /* + RFC 3376: 3.1. Socket-State + If the requested filter mode is INCLUDE *and* the requested + source list is empty, then the entry corresponding to the + requested interface and multicast address is deleted if + present. If no such entry is present, the request is ignored. + So, deleting the group present. + */ + group = find_group_by_addr(igmp, group_addr); + if (group && (group->group_filtermode_isexcl == 0)) + igmp_group_delete(group); + return; + } + /* non-existant group is created as INCLUDE {empty} */ group = igmp_add_group_by_addr(igmp, group_addr); if (!group) { |