diff options
Diffstat (limited to 'pimd/pim_igmpv3.c')
| -rw-r--r-- | pimd/pim_igmpv3.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/pimd/pim_igmpv3.c b/pimd/pim_igmpv3.c index 0a6b6b3795..7300e6c6b4 100644 --- a/pimd/pim_igmpv3.c +++ b/pimd/pim_igmpv3.c @@ -834,11 +834,26 @@ void igmpv3_report_toin(struct igmp_sock *igmp, struct in_addr from, on_trace(__PRETTY_FUNCTION__, ifp, from, group_addr, num_sources, sources); - /* non-existant group is created as INCLUDE {empty} */ - group = igmp_add_group_by_addr(igmp, group_addr); - if (!group) { - return; - } + /* + * 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. + */ + if (num_sources) + { + /* non-existant group is created as INCLUDE {empty} */ + group = igmp_add_group_by_addr(igmp, group_addr); + if (!group) { + return; + } + } + else + { + group = find_group_by_addr (igmp, group_addr); + if (!group) + return; + } if (group->group_filtermode_isexcl) { /* EXCLUDE mode */ |