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[NET]: Treat CHECKSUM_PARTIAL as CHECKSUM_UNNECESSARY

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When a transmitted packet is looped back directly, CHECKSUM_PARTIAL
maps to the semantics of CHECKSUM_UNNECESSARY.  Therefore we should
treat it as such in the stack.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu
2007-04-09 11:59:39 -07:00
committed by David S. Miller
parent 628592ccdb
commit 604763722c
13 changed files with 29 additions and 28 deletions
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3
net/ipv4/tcp_ipv4.c
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@@ -1638,8 +1638,7 @@ int tcp_v4_rcv(struct sk_buff *skb)
* Packet length and doff are validated by header prediction,
* provided case of th->doff==0 is eliminated.
* So, we defer the checks. */
if ((skb->ip_summed != CHECKSUM_UNNECESSARY &&
tcp_v4_checksum_init(skb)))
if (!skb_csum_unnecessary(skb) && tcp_v4_checksum_init(skb))
goto bad_packet;
th = tcp_hdr(skb);