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authorFlorian Westphal <fw@strlen.de>2010-06-03 04:43:44 +0400
committerDavid S. Miller <davem@davemloft.net>2010-06-05 13:23:14 +0400
commitaf9b4738574b46025de7ccbe75c7b24fd8914379 (patch)
tree6d05b82261ce76e6ecf00131c667292b62d16adf /net/ipv4/syncookies.c
parent2a1d4bd46047efff513600d7ff422bc344f540a6 (diff)
downloadlinux-af9b4738574b46025de7ccbe75c7b24fd8914379.tar.xz
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 <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/syncookies.c')
-rw-r--r--net/ipv4/syncookies.c2
1 files changed, 1 insertions, 1 deletions
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) ||