X-Spam-Check-By: sourceware.org Date: Thu, 17 Aug 2006 09:46:41 +0200 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: Cygwin 1.5.18: Problem using setsockopt() for multicast Message-ID: <20060817074641.GB20467@calimero.vinschen.de> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2i Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Unsubscribe: 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 On Aug 17 01:42, Alessandro Saffiotti wrote: > Hi there, > > I ran into the following problem when using setsockopt to create a > multicast receiver in my own application. Here is the relevant part > of the code: > [...] > if(setsockopt(tcp_broadcast_receiver, IPPROTO_IP, IP_ADD_MEMBERSHIP, > (const void *)&imreq, sizeof(struct ip_mreq)) != 0) > [...] > I have also read the discussion about the conflicting values for > constants between winsock1 and winsock2. I have tried to replace > IP_ADD_MEMBERSHIP by hardcoding either 5 (winsock1) or 12 (winsok2), > but I get the same behavior. Please don't do that, use the constants. > I run Cygwin 1.5.18 on Windows XP pro SP2. > > Any hints? Yes, upgrade to Cygwin 1.5.21 and try again, starting with recompiling the application. If it still fails, I'll have another look into it. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/