From aaa1c5d63dd91d25108cd15fcb50f7b5d578fa3b Mon Sep 17 00:00:00 2001
From: Markus Friedl <markus@cvs.openbsd.org>
Date: Fri, 16 Jul 2004 09:26:08 +0000
Subject: undo 1.148, otherwise we have assymmetric cwnd when entering
 ESTABLISHED: 2mss on the server side, and 1mss on the client.

---
 sys/netinet/tcp_input.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'sys/netinet/tcp_input.c')

diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c
index 4e444260b28..f0470d8c8af 100644
--- a/sys/netinet/tcp_input.c
+++ b/sys/netinet/tcp_input.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: tcp_input.c,v 1.174 2004/06/20 18:16:50 itojun Exp $	*/
+/*	$OpenBSD: tcp_input.c,v 1.175 2004/07/16 09:26:07 markus Exp $	*/
 /*	$NetBSD: tcp_input.c,v 1.23 1996/02/13 23:43:44 christos Exp $	*/
 
 /*
@@ -1203,6 +1203,15 @@ after_listen:
 			 */
 			if (tp->t_rtttime)
 				tcp_xmit_timer(tp, tcp_now - tp->t_rtttime);
+			/*
+			 * Since new data was acked (the SYN), open the
+			 * congestion window by one MSS.  We do this
+			 * here, because we won't go through the normal
+			 * ACK processing below.  And since this is the
+			 * start of the connection, we know we are in
+			 * the exponential phase of slow-start.
+			 */
+			tp->snd_cwnd += tp->t_maxseg;
 		} else
 			tp->t_state = TCPS_SYN_RECEIVED;
 
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