From owner-freebsd-net@FreeBSD.ORG  Tue Sep  2 07:00:53 2008
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 281EF10656C0
	for <freebsd-net@freebsd.org>; Tue,  2 Sep 2008 07:00:53 +0000 (UTC)
	(envelope-from julian@elischer.org)
Received: from outU.internet-mail-service.net (outu.internet-mail-service.net
	[216.240.47.244])
	by mx1.freebsd.org (Postfix) with ESMTP id 0DBFE8FC14
	for <freebsd-net@freebsd.org>; Tue,  2 Sep 2008 07:00:53 +0000 (UTC)
	(envelope-from julian@elischer.org)
Received: from idiom.com (mx0.idiom.com [216.240.32.160])
	by out.internet-mail-service.net (Postfix) with ESMTP id A52472423;
	Tue,  2 Sep 2008 00:00:52 -0700 (PDT)
Received: from julian-mac.elischer.org (localhost [127.0.0.1])
	by idiom.com (Postfix) with ESMTP id 6AFE52D603A;
	Tue,  2 Sep 2008 00:00:51 -0700 (PDT)
Message-ID: <48BCE4AA.6050807@elischer.org>
Date: Tue, 02 Sep 2008 00:00:58 -0700
From: Julian Elischer <julian@elischer.org>
User-Agent: Thunderbird 2.0.0.16 (Macintosh/20080707)
MIME-Version: 1.0
To: "Bruce M. Simpson" <bms@FreeBSD.org>
References: <3170f42f0809010507q6c37a9d5q19649bc261d7656d@mail.gmail.com>
	<48BBE7B2.4050409@FreeBSD.org>
In-Reply-To: <48BBE7B2.4050409@FreeBSD.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: debarshi.ray@gmail.com,
	FreeBSD networking and TCP/IP list <freebsd-net@freebsd.org>
Subject: Re: reading routing table
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 02 Sep 2008 07:00:53 -0000

Bruce M. Simpson wrote:
> Debarshi Ray wrote:
>> ...
>> I was going through the FreeBSD and NetBSD documentation and the
>> FreeBSD sources of netstat and route. I was suprised to see that while
>> NetBSD's route implementation has a 'show' command, FreeBSD does not
>> offer any such thing. Moreover it seems that one can not read the
>> entire routing table using the PF_ROUTE sockets and RTM_GET returns
>> information pertaining to only one destination. This suprised me
>> because one can do such a thing with the Linux kernel's RTNETLINK.
>>
>> Is there a reason why this is so? Or is reading from /dev/kmem the
>> only way to get a dump of the routing tables?
>>   
> 
> You want 'netstat -rn' to dump them, this is a very common command which 
> should be present in a number of online resources on using and 
> administering FreeBSD so I am somewhat surprised that you didn't find it.
> 
> P.S. Look in the sysctl tree if you need to snapshot the kernel IP 
> forwarding tables. You can use kmem, but it is generally frowned upon 
> unless you're working from core dumps -- kernels can be built without 
> kmem support, or kmem locked down, etc.

unfortunatly netstat -rn uses /dev/kmem

we've just never got around to implementing a better interface..

> 
> cheers
> BMS
> _______________________________________________
> freebsd-net@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-net
> To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"