X-Spam-Check-By: sourceware.org Date: Fri, 7 Apr 2006 17:56:53 -1000 (HST) From: Antonio Querubin To: Dave Korn Cc: cygwin@cygwin.com Subject: RE: getsockname problem In-Reply-To: <001101c65a43$890d59a0$a501a8c0@CAM.ARTIMI.COM> Message-ID: References: <001101c65a43$890d59a0$a501a8c0@CAM.ARTIMI.COM> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-IsSubscribed: yes 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 Fri, 7 Apr 2006, Dave Korn wrote: > Should have read the man page instead! > >> s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); >> printf("socket = %d\nlength = %d\n", s, len); >> >> rc = getsockname(s, (struct sockaddr *) &sa, &len); > > > http://www.opengroup.org/onlinepubs/007908799/xns/getsockname.html > > "If the socket has not been bound to a local name, the value stored in the > object pointed to by address is unspecified." This doesn't explain why the code fragment works under UNIX and Linux systems (that I have access to), but fails under Cygwin. According to Steven's 'Unix Network Programming', 2'd edition, Vol 1, "Posix.1g allows a call to getsockname() on an unbound socket". Furthermore, the Cygwin API indicates Cygwin's networking support is standardized to Posix.1g for getsockname() and a whole bunch of the other networking functions. -- 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/