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[NETFILTER]: Fix HW checksum handling in TCPMSS target 

Most importantly, remove bogus BUG() in receive path.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2005-08-20 17:40:41 -07:00 committed by David S. Miller
parent f93592ff4f
commit 7e71af49d4
1 changed files with 4 additions and 3 deletions
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7
net/ipv4/netfilter/ipt_TCPMSS.c
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@ -61,6 +61,10 @@ ipt_tcpmss_target(struct sk_buff **pskb,
if (!skb_ip_make_writable(pskb, (*pskb)->len))
return NF_DROP;
if ((*pskb)->ip_summed == CHECKSUM_HW &&
skb_checksum_help(*pskb, out == NULL))
return NF_DROP;
iph = (*pskb)->nh.iph;
tcplen = (*pskb)->len - iph->ihl*4;
@ -186,9 +190,6 @@ ipt_tcpmss_target(struct sk_buff **pskb,
newmss);
retmodified:
/* We never hw checksum SYN packets. */
BUG_ON((*pskb)->ip_summed == CHECKSUM_HW);
(*pskb)->nfcache |= NFC_UNKNOWN | NFC_ALTERED;
return IPT_CONTINUE;
}