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tcp: tcp_disconnect() should clear window_clamp

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NFS can reuse its TCP socket after calling tcp_disconnect().

We noticed window scaling was not negotiated in SYN packet of next
connection request.

Fix is to clear tp->window_clamp in tcp_disconnect().

Reported-by: Krzysztof Oledzki <ole@ans.pl>
Tested-by: Krzysztof Oledzki <ole@ans.pl>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2009-11-30 12:53:30 -08:00 committed by David S. Miller
parent 0cae200eec
commit 1fdf475aa1
1 changed files with 1 additions and 0 deletions
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net/ipv4/tcp.c
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@ -2059,6 +2059,7 @@ int tcp_disconnect(struct sock *sk, int flags)
tp->snd_ssthresh = TCP_INFINITE_SSTHRESH;
tp->snd_cwnd_cnt = 0;
tp->bytes_acked = 0;
tp->window_clamp = 0;
tcp_set_ca_state(sk, TCP_CA_Open);
tcp_clear_retrans(tp);
inet_csk_delack_init(sk);