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authorFlorian Westphal <fw@strlen.de>2010-06-21 11:48:44 +0000
committerDavid S. Miller <davem@davemloft.net>2010-06-26 22:00:03 -0700
commit734f614bc1e7c6bf075d201f6bd9a555b8b4a984 (patch)
treef5602e98d4088b1b667e286a1ead644122cd77e8 /net/ipv6/syncookies.c
parent9587c6ddd452314e8ed5707ad832a507a030ef57 (diff)
downloadop-kernel-dev-734f614bc1e7c6bf075d201f6bd9a555b8b4a984.zip
op-kernel-dev-734f614bc1e7c6bf075d201f6bd9a555b8b4a984.tar.gz
syncookies: do not store rcv_wscale in tcp timestamp
As pointed out by Fernando Gont there is no need to encode rcv_wscale into the cookie. We did not use the restored rcv_wscale anyway; it is recomputed via tcp_select_initial_window(). Thus we can save 4 bits in the ts option space by removing rcv_wscale. In case window scaling was not supported, we set the (invalid) wscale value 0xf. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/syncookies.c')
-rw-r--r--net/ipv6/syncookies.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c
index c7ee574..84d818c 100644
--- a/net/ipv6/syncookies.c
+++ b/net/ipv6/syncookies.c
@@ -217,7 +217,6 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
req->retrans = 0;
ireq->ecn_ok = 0;
ireq->snd_wscale = tcp_opt.snd_wscale;
- ireq->rcv_wscale = tcp_opt.rcv_wscale;
ireq->sack_ok = tcp_opt.sack_ok;
ireq->wscale_ok = tcp_opt.wscale_ok;
ireq->tstamp_ok = tcp_opt.saw_tstamp;
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