From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 11613 invoked by alias); 30 Jun 2006 13:34:05 -0000 Received: (qmail 11600 invoked by uid 22791); 30 Jun 2006 13:34:04 -0000 X-Spam-Check-By: sourceware.org Received: from aquarius.hirmke.de (HELO calimero.vinschen.de) (217.91.18.234) by sourceware.org (qpsmtpd/0.31.1) with ESMTP; Fri, 30 Jun 2006 13:34:00 +0000 Received: by calimero.vinschen.de (Postfix, from userid 500) id B046D544001; Fri, 30 Jun 2006 15:33:57 +0200 (CEST) Date: Fri, 30 Jun 2006 13:34:00 -0000 From: Corinna Vinschen To: 'the sound of one packet flapping' Subject: Re: sending an empty UDP packet. Message-ID: <20060630133357.GU18873@calimero.vinschen.de> Reply-To: cygwin-talk@cygwin.com Mail-Followup-To: 'the sound of one packet flapping' References: <20060630110904.GS18873@calimero.vinschen.de> <000a01c69c48$f81482f0$a501a8c0@CAM.ARTIMI.COM> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000a01c69c48$f81482f0$a501a8c0@CAM.ARTIMI.COM> User-Agent: Mutt/1.4.2i Mailing-List: contact cygwin-talk-help@cygwin.com; run by ezmlm Precedence: bulk List-Subscribe: List-Post: List-Help: , Sender: cygwin-talk-owner@cygwin.com Reply-To: The Cygwin-Talk Maiming List X-SW-Source: 2006-q2/txt/msg00476.txt.bz2 On Jun 30 14:27, Dave Korn wrote: > On 30 June 2006 12:09, Corinna Vinschen wrote: > > > On Jun 30 19:18, Tanaka Akira wrote: > >> Hi. I have a trouble to send an empty UDP packet. > > > > Thanks for the bug report and especially the testcase. It's incredible > > but the check for a zero length packet has been introduced in 2002, 4 > > years ago, and nobody has ever complained that it's wrong. Wow. Almost > > embarrassing. > > > > I've fixed that in current CVS. Check the next snapshot from > > http://cygwin.com/snapshots or wait for 1.5.20, which is really > > due soon now. > > Sending no data with unreliable delivery (of that no data) is a bit too zen > for most, I guess ... Agreed. I'm still scratching my head what sending an empty UDP packet is good for, but it's perfectly valid. Corinna