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ipv4: tcp: clean up tcp_v4_early_demux()

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Use same header helpers than tcp_v6_early_demux() because they
are a bit faster, and as they make IPv4/IPv6 versions look
the same.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2012-10-22 21:42:47 +00:00 committed by David S. Miller
parent f3f121359c
commit 45f00f99d6
1 changed files with 3 additions and 4 deletions
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7
net/ipv4/tcp_ipv4.c
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@ -1918,7 +1918,6 @@ EXPORT_SYMBOL(tcp_v4_do_rcv);
void tcp_v4_early_demux(struct sk_buff *skb)
{
struct net *net = dev_net(skb->dev);
const struct iphdr *iph;
const struct tcphdr *th;
struct sock *sk;
@ -1926,16 +1925,16 @@ void tcp_v4_early_demux(struct sk_buff *skb)
if (skb->pkt_type != PACKET_HOST)
return;
if (!pskb_may_pull(skb, ip_hdrlen(skb) + sizeof(struct tcphdr)))
if (!pskb_may_pull(skb, skb_transport_offset(skb) + sizeof(struct tcphdr)))
return;
iph = ip_hdr(skb);
th = (struct tcphdr *) ((char *)iph + ip_hdrlen(skb));
th = tcp_hdr(skb);
if (th->doff < sizeof(struct tcphdr) / 4)
return;
sk = __inet_lookup_established(net, &tcp_hashinfo,
sk = __inet_lookup_established(dev_net(skb->dev), &tcp_hashinfo,
iph->saddr, th->source,
iph->daddr, ntohs(th->dest),
skb->skb_iif);