From owner-freebsd-hackers@FreeBSD.ORG  Wed Apr 18 18:37:25 2007
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: freebsd-hackers@freebsd.org
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 4E97F16A403
	for <freebsd-hackers@freebsd.org>; Wed, 18 Apr 2007 18:37:25 +0000 (UTC)
	(envelope-from stas.ibragimov@gmail.com)
Received: from ug-out-1314.google.com (ug-out-1314.google.com [66.249.92.175])
	by mx1.freebsd.org (Postfix) with ESMTP id DBAB613C459
	for <freebsd-hackers@freebsd.org>; Wed, 18 Apr 2007 18:37:24 +0000 (UTC)
	(envelope-from stas.ibragimov@gmail.com)
Received: by ug-out-1314.google.com with SMTP id 71so402921ugh
	for <freebsd-hackers@freebsd.org>; Wed, 18 Apr 2007 11:37:23 -0700 (PDT)
DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta;
	h=domainkey-signature:received:received:date:to:subject:mime-version:content-type:content-disposition:user-agent:from:message-id;
	b=kAURDWIB5EPfZLT7sgzE65OEbE3+Ip3FAGdnVDADEky/RvZKPdYcpHoQQ11+aQ/TF4m+uEXMlBw/a8nqqrahtBWlKwXMkpRjqdvByhWan4j8ws5rxsiW/i5JtbBhb1YVu7jfPB+zuh5BRBotZdK49gsanWjt7ZiOPkg4BPzN2Kw=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta;
	h=received:date:to:subject:mime-version:content-type:content-disposition:user-agent:from:message-id;
	b=JfBJD2RSegvh5UrsT3tsODkgxzJrl8PqLUJhv7J/KDqMTUClpnBsP2eSC+JBqIM/51pjJKj4fnxaXwCSClhSsn7iQIpmw3d258f1s6QHbr1OQBoayqqVUMjlTFCQTMXDQtBGSM73GjRMDWJpWnGs2tcQCGP8OkdOKXEKfrareXA=
Received: by 10.66.248.13 with SMTP id v13mr1427019ugh.1176919752536;
	Wed, 18 Apr 2007 11:09:12 -0700 (PDT)
Received: from localhost ( [213.141.154.21])
	by mx.google.com with ESMTP id s1sm2086814uge.2007.04.18.11.09.10;
	Wed, 18 Apr 2007 11:09:10 -0700 (PDT)
Date: Wed, 18 Apr 2007 22:11:48 +0400
To: freebsd-hackers@freebsd.org
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.5.13 (2006-08-11)
From: stas.ibragimov@gmail.com
Message-ID: <46265ec6.4bc81c47.0b0d.ffff97f3@mx.google.com>
Subject: Routing
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 18 Apr 2007 18:37:25 -0000

Hi, hackers :) 
In /usr/src/sys/netinet/tcp_output.c if function tcp_output() there are code:
error = ip_output(m, tp->t_inpcb->inp_options, NULL,
    ((so->so_options & SO_DONTROUTE) ? IP_ROUTETOIF : 0), 0,
    tp->t_inpcb);
In this function there are only one call ip_output function, but struct route is null.
I think, that more optimaly is to keep the pointer to struct route in tcpcb.And not to search route every time, when tcp_output called.