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netfilter: nf_ct_tcp: don't scale the size of the window up twice 

For a picked up connection, the window win is scaled twice: one is by the
initialization code, and the other is by the sender updating code.

I use the temporary variable swin instead of modifying the variable win.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Acked-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Changli Gao 2012-04-01 17:25:06 +00:00 committed by Pablo Neira Ayuso
parent 110c43304d
commit 6ee0b693bd
1 changed files with 2 additions and 2 deletions
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4
net/netfilter/nf_conntrack_proto_tcp.c
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@ -584,8 +584,8 @@ static bool tcp_in_window(const struct nf_conn *ct,
* Let's try to use the data from the packet.
*/
sender->td_end = end;
win <<= sender->td_scale;
sender->td_maxwin = (win == 0 ? 1 : win);
swin = win << sender->td_scale;
sender->td_maxwin = (swin == 0 ? 1 : swin);
sender->td_maxend = end + sender->td_maxwin;
/*
* We haven't seen traffic in the other direction yet