From bc8c20acaea154efc558f5f4122ed65d396f6156 Mon Sep 17 00:00:00 2001 From: Satish Ashok Date: Mon, 13 Jul 2015 05:28:37 -0700 Subject: bridge: multicast: treat igmpv3 report with INCLUDE and no sources as a leave A report with INCLUDE/Change_to_include and empty source list should be treated as a leave, specified by RFC 3376, section 3.1: "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." Signed-off-by: Satish Ashok Signed-off-by: Nikolay Aleksandrov Signed-off-by: David S. Miller --- net/bridge/br_multicast.c | 37 ++++++++++++++++++++++++++++++------- 1 file changed, 30 insertions(+), 7 deletions(-) (limited to 'net/bridge') diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 742a6c27d7a2..79db489cdade 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -39,6 +39,16 @@ static void br_multicast_start_querier(struct net_bridge *br, struct bridge_mcast_own_query *query); static void br_multicast_add_router(struct net_bridge *br, struct net_bridge_port *port); +static void br_ip4_multicast_leave_group(struct net_bridge *br, + struct net_bridge_port *port, + __be32 group, + __u16 vid); +#if IS_ENABLED(CONFIG_IPV6) +static void br_ip6_multicast_leave_group(struct net_bridge *br, + struct net_bridge_port *port, + const struct in6_addr *group, + __u16 vid); +#endif unsigned int br_mdb_rehash_seq; static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b) @@ -1010,9 +1020,15 @@ static int br_ip4_multicast_igmp3_report(struct net_bridge *br, continue; } - err = br_ip4_multicast_add_group(br, port, group, vid); - if (err) - break; + if ((type == IGMPV3_CHANGE_TO_INCLUDE || + type == IGMPV3_MODE_IS_INCLUDE) && + ntohs(grec->grec_nsrcs) == 0) { + br_ip4_multicast_leave_group(br, port, group, vid); + } else { + err = br_ip4_multicast_add_group(br, port, group, vid); + if (err) + break; + } } return err; @@ -1071,10 +1087,17 @@ static int br_ip6_multicast_mld2_report(struct net_bridge *br, continue; } - err = br_ip6_multicast_add_group(br, port, &grec->grec_mca, - vid); - if (err) - break; + if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE || + grec->grec_type == MLD2_MODE_IS_INCLUDE) && + ntohs(*nsrcs) == 0) { + br_ip6_multicast_leave_group(br, port, &grec->grec_mca, + vid); + } else { + err = br_ip6_multicast_add_group(br, port, + &grec->grec_mca, vid); + if (!err) + break; + } } return err; -- cgit v1.2.3 From 5ebc784625ea68a9570d1f70557e7932988cd1b4 Mon Sep 17 00:00:00 2001 From: Nikolay Aleksandrov Date: Mon, 13 Jul 2015 06:36:19 -0700 Subject: bridge: mdb: fix double add notification Since the mdb add/del code was introduced there have been 2 br_mdb_notify calls when doing br_mdb_add() resulting in 2 notifications on each add. Example: Command: bridge mdb add dev br0 port eth1 grp 239.0.0.1 permanent Before patch: root@debian:~# bridge monitor all [MDB]dev br0 port eth1 grp 239.0.0.1 permanent [MDB]dev br0 port eth1 grp 239.0.0.1 permanent After patch: root@debian:~# bridge monitor all [MDB]dev br0 port eth1 grp 239.0.0.1 permanent Signed-off-by: Nikolay Aleksandrov Fixes: cfd567543590 ("bridge: add support of adding and deleting mdb entries") Signed-off-by: David S. Miller --- net/bridge/br_mdb.c | 1 - 1 file changed, 1 deletion(-) (limited to 'net/bridge') diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c index c11cf2611db0..1198a3dbad95 100644 --- a/net/bridge/br_mdb.c +++ b/net/bridge/br_mdb.c @@ -351,7 +351,6 @@ static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port, if (state == MDB_TEMPORARY) mod_timer(&p->timer, now + br->multicast_membership_interval); - br_mdb_notify(br->dev, port, group, RTM_NEWMDB); return 0; } -- cgit v1.2.3