From owner-freebsd-net@FreeBSD.ORG  Wed Sep 22 08:07:30 2004
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id D3C1716A4CE
	for <freebsd-net@freebsd.org>; Wed, 22 Sep 2004 08:07:30 +0000 (GMT)
Received: from burka.carrier.kiev.ua (burka.carrier.kiev.ua [193.193.193.107])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 17F2843D2D
	for <freebsd-net@freebsd.org>; Wed, 22 Sep 2004 08:07:30 +0000 (GMT)
	(envelope-from netch@lucky.net)
Received: from burka.carrier.kiev.ua (netch@localhost [127.0.0.1])
	by burka.carrier.kiev.ua with ESMTP id i8M87NG2023449;
	Wed, 22 Sep 2004 11:07:24 +0300 (EEST)
	(envelope-from netch@burka.carrier.kiev.ua)
Received: (from netch@localhost)
	by burka.carrier.kiev.ua (8.12.11/8.12.11/Submit) id i8M87MPg023446;
	Wed, 22 Sep 2004 11:07:22 +0300 (EEST)
	(envelope-from netch)
Date: Wed, 22 Sep 2004 11:07:22 +0300
From: Valentin Nechayev <netch@lucky.net>
To: "JINMEI Tatuya / ?$B?@L@C#:H" <jinmei@isl.rdc.toshiba.co.jp>
Message-ID: <20040922080722.GS89036@lucky.net>
References: <20040921123016.GA41677@melusine.cuivre.fr.eu.org>
	<y7visa7h2ki.wl@ocean.jinmei.org> <20040921190717.GG84228@lucky.net>
	<y7vfz5bgzda.wl@ocean.jinmei.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <y7vfz5bgzda.wl@ocean.jinmei.org>
X-42: On
X-Verify-Sender: Address <netch@burka.carrier.kiev.ua> has been verified
	(burka.carrier.kiev.ua)
cc: freebsd-net@freebsd.org
Subject: Re: freeaddrinfo(NULL)
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
Reply-To: netch@lucky.net
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: Wed, 22 Sep 2004 08:07:30 -0000

 Wed, Sep 22, 2004 at 05:07:13, jinmei wrote about "Re: freeaddrinfo(NULL)": 

> I was not talking about things like whether NULL had been specially
> designed or not.  I was basically talking about any invalid argument
> to freeaddrinfo.

Well, garbage in pointer is unquestionably invalid, but whether NULL is invalid
it's discussable (and flammable) question.
Initing pointer to NULL is popular method and it's reasonable to keep it
working without extra actions, as verifying !=NULL at freeing.

As this discussion has no common with -net questions, I propose to move
it to some another list.

> However, since the API
> specification is silent on this, I'd then request that the man page
> make an explicit note that the application programmer should be check
> if the argument to freeaddrinfo() is valid because passing a NULL
> pointer may cause an unexpected result, including segfaulting, on
> other systems.

Agreed.


-netch-