From owner-freebsd-hackers  Thu Jan  7 00:11:11 1999
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id AAA22594
          for freebsd-hackers-outgoing; Thu, 7 Jan 1999 00:11:11 -0800 (PST)
          (envelope-from owner-freebsd-hackers@FreeBSD.ORG)
Received: from fep1-orange.clear.net.nz (fep1-orange.clear.net.nz [203.97.32.1])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id AAA22587
          for <freebsd-hackers@FreeBSD.ORG>; Thu, 7 Jan 1999 00:11:09 -0800 (PST)
          (envelope-from jabley@buddha.clear.net.nz)
Received: from buddha.clear.net.nz (buddha.clear.net.nz [192.168.24.106]) by fep1-orange.clear.net.nz (1.5/1.11) with ESMTP id VAA27985; Thu, 7 Jan 1999 21:10:39 +1300 (NZDT)
Received: (from jabley@localhost)
	by buddha.clear.net.nz (8.9.1/8.9.1) id VAA14297;
	Thu, 7 Jan 1999 21:10:36 +1300 (NZDT)
	(envelope-from jabley)
Date: Thu, 7 Jan 1999 21:10:36 +1300
From: Joe Abley <jabley@clear.co.nz>
To: Wes Peters <wes@softweyr.com>
Cc: freebsd-hackers@FreeBSD.ORG, jabley@clear.co.nz
Subject: Re: setting DF bit
Message-ID: <19990107211036.A14269@clear.co.nz>
References: <19990107135107.B12785@clear.co.nz> <36940A44.89628F8B@softweyr.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Mailer: Mutt 0.95i
In-Reply-To: <36940A44.89628F8B@softweyr.com>; from Wes Peters on Wed, Jan 06, 1999 at 06:13:40PM -0700
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

On Wed, Jan 06, 1999 at 06:13:40PM -0700, Wes Peters wrote:
> Joe Abley wrote:
> > How do arrange for the DF bit in the IP header to be set for a given
> > connected socket?
> > 
> > I was expecting to find a sockopt, but I can't find one...
> 
> And won't.  "sysctl -w net.inet.ip.sourceroute 1" will turn on DF
> system-wide, setting it to zero (the default) will turn it back off.

So what is the approved manner for doing a ping with the "DF" bit set?
In the interests of testing, we need to set the DF bit in our icmp echo
request. I do not want to set the DF bit on _everything_ though.

Why do you say "won't"?


Joe


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message