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bridge: Pseudo-header required for the checksum of ICMPv6

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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 <[email protected]>
Reported-by: Ang Way Chuang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Yan, Zheng 2011-08-23 22:54:33 +00:00 • committed by David S. Miller
commit 4b275d7efa
1 changed files with 10 additions and 3 deletions
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13
net/bridge/br_multicast.c
View file

@ -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;
}