syncookies: avoid unneeded tcp header flag double check

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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>

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This commit is contained in:

Florian Westphal 2010-06-03 00:43:44 +00:00 • committed by David S. Miller

parent 2a1d4bd460

commit af9b473857

4 changed files with 4 additions and 4 deletions

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2

net/ipv4/syncookies.c

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2

net/ipv4/tcp_ipv4.c

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2

net/ipv6/syncookies.c

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2

net/ipv6/tcp_ipv6.c

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