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authorPatrick McHardy <kaber@trash.net>2005-08-20 17:39:15 -0700
committerDavid S. Miller <davem@davemloft.net>2005-08-20 17:39:15 -0700
commitf93592ff4fa4a55aa7640d435fa93338e190294d (patch)
tree42ea51265582ba2b38089fd347cf3e16cfea7538 /net
parentfd841326d73096ad79be9c3fa348f9ad04541cc2 (diff)
[NETFILTER]: Fix HW checksum handling in ECN target
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/netfilter/ipt_ECN.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/net/ipv4/netfilter/ipt_ECN.c b/net/ipv4/netfilter/ipt_ECN.c
index d3250a3a5db4..94a0ce1c1c9d 100644
--- a/net/ipv4/netfilter/ipt_ECN.c
+++ b/net/ipv4/netfilter/ipt_ECN.c
@@ -71,6 +71,10 @@ set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo, int inward)
return 0;
tcph = (void *)(*pskb)->nh.iph + (*pskb)->nh.iph->ihl*4;
+ if ((*pskb)->ip_summed == CHECKSUM_HW &&
+ skb_checksum_help(*pskb, inward))
+ return 0;
+
diffs[0] = ((u_int16_t *)tcph)[6];
if (einfo->operation & IPT_ECN_OP_SET_ECE)
tcph->ece = einfo->proto.tcp.ece;
@@ -79,13 +83,10 @@ set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo, int inward)
diffs[1] = ((u_int16_t *)tcph)[6];
diffs[0] = diffs[0] ^ 0xFFFF;
- if ((*pskb)->ip_summed != CHECKSUM_HW)
+ if ((*pskb)->ip_summed != CHECKSUM_UNNECESSARY)
tcph->check = csum_fold(csum_partial((char *)diffs,
sizeof(diffs),
tcph->check^0xFFFF));
- else
- if (skb_checksum_help(*pskb, inward))
- return 0;
(*pskb)->nfcache |= NFC_ALTERED;
return 1;
}