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Subject[PATCH 1/2] bridge: Fix MLD queries' ethernet source address
Date
Map the IPv6 header's destination multicast address to an ethernet
source address instead of the MLD queries multicast address.

For instance for a general MLD query (multicast address in the MLD query
set to ::), this would wrongly be mapped to 33:33:00:00:00:00, although
an MLD queries destination MAC should always be 33:33:00:00:00:01 which
matches the IPv6 header's multicast destination ff02::1.

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
---
net/bridge/br_multicast.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index b5eb28a..f904a2e 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -435,7 +435,6 @@ static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
eth = eth_hdr(skb);

memcpy(eth->h_source, br->dev->dev_addr, 6);
- ipv6_eth_mc_map(group, eth->h_dest);
eth->h_proto = htons(ETH_P_IPV6);
skb_put(skb, sizeof(*eth));

@@ -449,6 +448,7 @@ static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
ip6h->hop_limit = 1;
ipv6_addr_set(&ip6h->saddr, 0, 0, 0, 0);
ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1));
+ ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);

hopopt = (u8 *)(ip6h + 1);
hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
--
1.7.2.3
--
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