Bug #52848 [Com]: Processing out-of-band data doesn't work

Edit report at http://bugs.php.net/bug.php?id=52848&edit=1 ID: 52848 Comment by: php dot net at phrozenbyte dot de Reported by: php dot net at phrozenbyte dot de Summary: Processing out-of-band data doesn't work Status: To be documented Type: Bug Package: Streams related Operating System: Ubuntu 10.04 Lucid Lynx PHP Version: 5.3.3 Block user comment: N New Comment: Ok, thanks. As cataphract at php dot net mentioned first there are situations on which even that single byte isn't shown. I'm not able to reproduce the bug, the only possibility is to repeat running my test server and client. After some trys the script will result in OOB-Data 1/2: '' OOB-Data 2/2: '' Data 1/2: '12345678' Data 2/2: '' Previous Comments: ------------------------------------------------------------------------ [2010-09-15 16:15:20] cataphract@php.net It should be documented in stream_socket_sendto and stream_socket_recvfrom, that OOB data can be only one byte long. ------------------------------------------------------------------------ [2010-09-15 16:13:20] cataphract@php.net "In Transmission Control Protocol (TCP), the OOB data block is always one byte. Therefore, if you send multiple-byte OOB data, only the last byte of the OOB data is retrieved. The remaining data is treated like normal data." See also http://support.microsoft.com/kb/830597 ------------------------------------------------------------------------ [2010-09-15 14:44:54] cataphract@php.net Sorry, correction: Windows presented the same behavior. ------------------------------------------------------------------------ [2010-09-15 14:15:06] cataphract@php.net I can reproduce it in Linux. In Windows, the server gets no data at all (the first stream_socket_recvfrom keeps blocking indefinitely). ------------------------------------------------------------------------ [2010-09-15 04:13:49] php dot net at phrozenbyte dot de Description: ------------ I'm not sure what's going wrong (stream_socket_sendto() or stream_socket_recvfrom()) but proccessing out-of-band data doesn't work correctly. Only the last byte is send as out-of-band data, all other data is send as usally. Test script: --------------- Server: <?php $server = stream_socket_server('tcp://127.0.0.1:1234'); $socket = stream_socket_accept($server); echo "OOB-Data 1/2: '".stream_socket_recvfrom($socket, 1500, STREAM_OOB)."'\n"; echo "OOB-Data 2/2: '".stream_socket_recvfrom($socket, 1500, STREAM_OOB)."'\n"; echo "Data 1/2: '".stream_socket_recvfrom($socket, 1500)."'\n"; echo "Data 2/2: '".stream_socket_recvfrom($socket, 1500)."'\n"; fclose($socket); fclose($server); ?> Client: <?php $socket = stream_socket_client('tcp://127.0.0.1:1234'); stream_socket_sendto($socket, '123456789', STREAM_OOB); fclose($socket); ?> Expected result: ---------------- OOB-Data 1/2: '123456789' OOB-Data 2/2: '' Data 1/2: '' Data 2/2: '' Actual result: -------------- OOB-Data 1/2: '9' OOB-Data 2/2: '' Data 1/2: '12345678' Data 2/2: '' ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=52848&edit=1