From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cumulusnetworks.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=qCMhE+IyUNZpEb0UQLMt2yWkZywg/6AiYdFZuGY7RYo=; b=fxsnnsW8cpD6k092sXOhtgpGpBkjSqp35ceZ5w2aseVgDIlLLpLwM/+vS0pUlgZ+LN 45so0yu+/FWoBPE7wQ/qQzC0U5jM9qDW7dEzJUlZ59jM8jZ6+rifQ0PEoA6sw6Ep2yO7 2uVYOIHMcdqT/I3gcy+SYPC++nIcVK6FOnRWY= From: Nikolay Aleksandrov Date: Sat, 27 Oct 2018 12:07:47 +0300 Message-Id: <20181027090747.22104-1-nikolay@cumulusnetworks.com> In-Reply-To: <90c5f2fe-1743-6b17-2e44-eba58cdbbb35@cumulusnetworks.com> References: <90c5f2fe-1743-6b17-2e44-eba58cdbbb35@cumulusnetworks.com> Subject: [Bridge] [PATCH net] net: bridge: remove ipv6 zero address check in mcast queries List-Id: Linux Ethernet Bridging List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: netdev@vger.kernel.org Cc: Nikolay Aleksandrov , roopa@cumulusnetworks.com, bridge@lists.linux-foundation.org, yinxu@redhat.com, liuhangbin@gmail.com, davem@davemloft.net Recently a check was added which prevents marking of routers with zero source address, but for IPv6 that cannot happen as the relevant RFCs actually forbid such packets: RFC 2710 (MLDv1): "To be valid, the Query message MUST come from a link-local IPv6 Source Address, be at least 24 octets long, and have a correct MLD checksum." Same goes for RFC 3810. And also it can be seen as a requirement in ipv6_mc_check_mld_query() which is used by the bridge to validate the message before processing it. Thus any queries with :: source address won't be processed anyway. So just remove the check for zero IPv6 source address from the query processing function. Fixes: 5a2de63fd1a5 ("bridge: do not add port to router list when receives query with source 0.0.0.0") Signed-off-by: Nikolay Aleksandrov --- net/bridge/br_multicast.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 41cdafbf2ebe..6bac0d6b7b94 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -1428,8 +1428,7 @@ static void br_multicast_query_received(struct net_bridge *br, * is 0.0.0.0 should not be added to router port list. */ if ((saddr->proto == htons(ETH_P_IP) && saddr->u.ip4) || - (saddr->proto == htons(ETH_P_IPV6) && - !ipv6_addr_any(&saddr->u.ip6))) + saddr->proto == htons(ETH_P_IPV6)) br_multicast_mark_router(br, port); } -- 2.17.2