From 46edec2346d7678769ef5afe43c12651dbe830aa Mon Sep 17 00:00:00 2001
From: andre <andre@FreeBSD.org>
Date: Wed, 21 Mar 2007 19:04:07 +0000
Subject: Subtract optlen in the maximum length check for TSO and finally avoid
 slightly oversized TSO mbuf chains.

Submitted by:	kmacy
---
 sys/netinet/tcp_output.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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

diff --git a/sys/netinet/tcp_output.c b/sys/netinet/tcp_output.c
index 7c52b8d..ac1649a 100644
--- a/sys/netinet/tcp_output.c
+++ b/sys/netinet/tcp_output.c
@@ -717,7 +717,7 @@ send:
 	if (len + optlen + ipoptlen > tp->t_maxopd) {
 		flags &= ~TH_FIN;
 		if (tso) {
-			if (len > TCP_MAXWIN - hdrlen) {
+			if (len > TCP_MAXWIN - hdrlen - optlen) {
 				len = TCP_MAXWIN - hdrlen - optlen;
 				len = len - (len % (tp->t_maxopd - optlen));
 				sendalot = 1;
-- 
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