X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=-1.1 required=5.0 tests=AWL,BAYES_00,RCVD_IN_SORBS_WEB,SPF_PASS X-Spam-Check-By: sourceware.org Message-ID: <4B2B280D.1060105@gmail.com> Date: Fri, 18 Dec 2009 09:58:21 +0300 From: yesin User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 To: cygwin@cygwin.com Subject: Re: SO_REUSEADDR and windows enhanced socket security References: <4B27AFEB.4030609@gmail.com> <20091215171051.GH8059@calimero.vinschen.de> In-Reply-To: <20091215171051.GH8059@calimero.vinschen.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Corinna! Thanks! Can you shedule a build for cygwin.dll with changes included in CVS? I promise to test it! Thanks again,Vladimir Yesin. Corinna Vinschen ?????: > On Dec 15 18:48, yesin wrote: > >> looks like a problem with SO_REUSEADDR exists in CYGWIN for all >> windows with support for "Enhanced socket security" (see >> http://msdn.microsoft.com/en-us/library/ms740621(VS.85).aspx ) >> >> >> i'am trying to start multimple simultaneous UDP listeners for a >> multicast packets on a single machine (reuse same address and port >> with SO_REUSEADDR) >> [...] >> with cygwin environment i can't run multiple listerers... bind error: >> Address already in use! >> > > Thanks for the report and especially thanks for the testcase. There > is code in Cygwin which skips calls to setsockopt(SO_REUSEADDR) on > systems supporting enhanced socket security. That's necessary to > emulate socket re-binding behaviour more closely to POSIX behaviour. > The problem was that this should have been only called for TCP sockets > but Cygwin accidentally called it for UDP sockets as well. I fixed > that in CVS. > > > Thanks again, > Corinna > > -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple