From af9b4738574b46025de7ccbe75c7b24fd8914379 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Thu, 3 Jun 2010 00:43:44 +0000 Subject: syncookies: avoid unneeded tcp header flag double check caller: if (!th->rst && !th->syn && th->ack) callee: if (!th->ack) make the caller only check for !syn (common for 3whs), and move the !rst / ack test to the callee. Signed-off-by: Florian Westphal Signed-off-by: David S. Miller --- net/ipv4/syncookies.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/ipv4/syncookies.c') diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c index 5c24db4a3c91..c9dac8615958 100644 --- a/net/ipv4/syncookies.c +++ b/net/ipv4/syncookies.c @@ -266,7 +266,7 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb, struct rtable *rt; __u8 rcv_wscale; - if (!sysctl_tcp_syncookies || !th->ack) + if (!sysctl_tcp_syncookies || !th->ack || th->rst) goto out; if (tcp_synq_no_recent_overflow(sk) || -- cgit v1.2.3-59-g8ed1b