On May 16 14:43, Jacob Eiler wrote: > Hi. > > I am experiencing an issue with getsockopt when running an application > under CygWin. > > The application (Kannel sms gateway) creates a new socket, attempt to > connect non-blocking to the other host and later calls getsockopt to > check for errors: > > s = socket(PF_INET, SOCK_STREAM, 0); > ... > flags = fcntl(s, F_GETFL, 0); > fcntl(s, F_SETFL, flags | O_NONBLOCK); > ... > connect(s, &addr, sizeof(addr)) > > connect returns EINPROGRESS and the application has a polling thread > setup to handle timeout and check for changes. In both cases a callback > function is invoked. > > The callback function checks the connection by calling > > getsockopt(s, SOL_SOCKET, SO_ERROR, &err, &len) > > but it returns 0 and no error - even if the connection was never > established. Subsequently the application tries to write data to the > socket - which fails with a "transport endpoint is not connected" error. > > The code works just fine on Linux with getsockopt returning an error. > Any pointer on how to get this working will be greatly appreciated.
Use select. I'm not sure the underlying Winsock implementation sets the SO_ERROR value in the same way as on Linux. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- 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
