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[TCP]: Introduce tcp_hdrlen() and tcp_optlen()

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The ip_hdrlen() buddy, created to reduce the number of skb->h.th-> uses and to
avoid the longer, open coded equivalent.

Ditched a no-op in bnx2 in the process.

I wonder if we should have a BUG_ON(skb->h.th->doff < 5) in tcp_optlen()...

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo
2007-03-18 17:43:48 -07:00
committed by David S. Miller
parent 88c7664f13
commit ab6a5bb6b2
14 changed files with 32 additions and 26 deletions
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2
net/ipv4/tcp_ipv4.c
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@@ -1564,7 +1564,7 @@ int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
return 0;
}
if (skb->len < (skb->h.th->doff << 2) || tcp_checksum_complete(skb))
if (skb->len < tcp_hdrlen(skb) || tcp_checksum_complete(skb))
goto csum_err;
if (sk->sk_state == TCP_LISTEN) {