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| author | Florian Westphal <fw@strlen.de> | 2010-06-21 11:48:44 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-26 22:00:03 -0700 |
| commit | 734f614bc1e7c6bf075d201f6bd9a555b8b4a984 (patch) | |
| tree | f5602e98d4088b1b667e286a1ead644122cd77e8 /net/ipv6 | |
| parent | 9587c6ddd452314e8ed5707ad832a507a030ef57 (diff) | |
| download | linux-734f614bc1e7c6bf075d201f6bd9a555b8b4a984.tar.gz linux-734f614bc1e7c6bf075d201f6bd9a555b8b4a984.tar.bz2 linux-734f614bc1e7c6bf075d201f6bd9a555b8b4a984.zip | |
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')
| -rw-r--r-- | net/ipv6/syncookies.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c index c7ee57421ece..84d818cfae17 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; |