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authorYan, Zheng <zheng.z.yan@intel.com>2011-08-23 22:54:33 +0000
committerDavid S. Miller <davem@davemloft.net>2011-08-24 17:49:00 -0700
commit4b275d7efa1c4412f0d572fcd7f78ed0919370b3 (patch)
tree79affe03339b4b3815043ae9ebe572264ec52667 /net
parente05c4ad3ed874ee4f5e2c969e55d318ec654332c (diff)
downloadlwn-4b275d7efa1c4412f0d572fcd7f78ed0919370b3.tar.gz
lwn-4b275d7efa1c4412f0d572fcd7f78ed0919370b3.zip
bridge: Pseudo-header required for the checksum of ICMPv6
Checksum of ICMPv6 is not properly computed because the pseudo header is not used. Thus, the MLD packet gets dropped by the bridge. Signed-off-by: Zheng Yan <zheng.z.yan@intel.com> Reported-by: Ang Way Chuang <wcang@sfc.wide.ad.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/bridge/br_multicast.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 2d85ca7111d3..22d2d1af1c83 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -1520,16 +1520,23 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br,
err = pskb_trim_rcsum(skb2, len);
if (err)
goto out;
+ err = -EINVAL;
}
+ ip6h = ipv6_hdr(skb2);
+
switch (skb2->ip_summed) {
case CHECKSUM_COMPLETE:
- if (!csum_fold(skb2->csum))
+ if (!csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, skb2->len,
+ IPPROTO_ICMPV6, skb2->csum))
break;
/*FALLTHROUGH*/
case CHECKSUM_NONE:
- skb2->csum = 0;
- if (skb_checksum_complete(skb2))
+ skb2->csum = ~csum_unfold(csum_ipv6_magic(&ip6h->saddr,
+ &ip6h->daddr,
+ skb2->len,
+ IPPROTO_ICMPV6, 0));
+ if (__skb_checksum_complete(skb2))
goto out;
}