PHP 4.0 Bug #7073 Updated: socket_set_timeout results in incorrect socket timeouts

ID: 7073 User Update by: tcarroll@chc-chimes.com Status: Closed Bug Type: Sockets related Description: socket_set_timeout results in incorrect socket timeouts My bad. Set me straight Previous Comments: --------------------------------------------------------------------------- [2000-10-09 09:31:44] andrei@php.net You are not correct. ptimeout gets set to either NULL or the address of timeout structure. The timeout structure is then assigned the value of passed timeout inside the loop so ptimeout _is_ set as well. This is necessary because on Linux the value of ptimeout will be undefined after select() returns. --------------------------------------------------------------------------- [2000-10-06 16:41:33] tcarroll@chc-chimes.com The following script illustrates the problem. //open some $sock socket_set_timeout( $sock, 45 ); if(!($ret = fread( $sock, 255 )) { //Happens randomly $status = socket_get_status( $sock ); if( $status['timeout'] ) echo 'I timed out!'; } The problem is in php_sockwait_for_data:ext/standard/file.c If a timeout is set, ptimeout is equated to a non-initialized variable. This explains the random timeout behavior a diff follow of fsock.c follows: --- /home/tcarroll/cvs-php/php4/ext/standard/fsock.c Sun Aug 27 00:14:47 2000 +++/home/tcarroll/php-4.0.2/ext/standard/fsock.c Fri Oct 6 16:14:22 2000 @@ -493,9 +493,9 @@ static void php_sockwait_for_data(php_sockbuf *sock) { - fd_set fdr, tfdr; + fd_set fdr; int retval; - struct timeval timeout, *ptimeout; + struct timeval *ptimeout; FD_ZERO(&fdr); FD_SET(sock->socket, &fdr); @@ -504,13 +504,10 @@ if (sock->timeout.tv_sec == -1) ptimeout = NULL; else - ptimeout = &timeout; + ptimeout = &sock->timeout; while(1) { - tfdr = fdr; - timeout = sock->timeout; - - retval = select(sock->socket + 1, &tfdr, NULL, NULL, ptimeout); + retval = select(sock->socket + 1, &fdr, NULL, NULL, ptimeout); if (retval == 0) sock->timeout_event = 1; --------------------------------------------------------------------------- Full Bug description available at: http://bugs.php.net/?id=7073