diff mbox

[net] bridge: multicast: treat igmpv3 report with INCLUDE and no sources as a leave

Message ID 1436790517-30266-1-git-send-email-nikolay@cumulusnetworks.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Nikolay Aleksandrov July 13, 2015, 12:28 p.m. UTC 
From: Satish Ashok <sashok@cumulusnetworks.com>

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 <sashok@cumulusnetworks.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
---
 net/bridge/br_multicast.c | 37 ++++++++++++++++++++++++++++++-------
 1 file changed, 30 insertions(+), 7 deletions(-)

Comments

David Miller July 16, 2015, 12:10 a.m. UTC | #1 
From: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Date: Mon, 13 Jul 2015 05:28:37 -0700

> From: Satish Ashok <sashok@cumulusnetworks.com>
> 
> 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 <sashok@cumulusnetworks.com>
> Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>

Applied, thanks.
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diff mbox

Patch

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;