Bug #76839 [NEW]: socket_recvfrom may return an invalid 'from' address on MacOS

From: michael at meyer dot io Operating system: macOS 10.14 PHP version: 7.2.9 Package: Sockets related Bug Type: Bug Bug description:socket_recvfrom may return an invalid 'from' address on MacOS Description: ------------ On MacOS 10.14 w/PHP 7.2.9, socket_recvfrom is returning invalid 'from' addresses which have trailing garbage bytes at the end. This makes it impossible to respond with socket_sendto unless you know what the correct 'from' address should be. I created a pull request for this bug on GitHub: https://github.com/php/php-src/pull/3408 Test script: --------------- <?php for ($i = 0; $i < 10; $i++) { $senderSocketPath = '/tmp/' . substr(md5(rand()), 0, rand(8, 16)) . '.sock'; $senderSocket = socket_create(AF_UNIX, SOCK_DGRAM, 0); socket_bind($senderSocket, $senderSocketPath); $receiverSocketPath = '/tmp/' . substr(md5(rand()), 0, rand(8, 16)) . '.sock'; $receiverSocket = socket_create(AF_UNIX, SOCK_DGRAM, 0); socket_bind($receiverSocket, $receiverSocketPath); // Send message from socket 1 to socket 2 socket_sendto($senderSocket, 'Ping!', 5, 0, $receiverSocketPath); // Receive & respond to message on socket 2 $from = ''; $message = ''; socket_recvfrom($receiverSocket, $message, 65535, 0, $from); echo "Received '$message'\n"; // Respond to the sender using the 'from' address from socket_recvfrom socket_sendto($receiverSocket, 'Pong!', 5, 0, $from); echo "Responded to sender with 'Pong!'\n"; socket_close($receiverSocket); unlink($receiverSocketPath); socket_close($senderSocket); unlink($senderSocketPath); } Expected result: ---------------- Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Actual result: -------------- Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' PHP Warning: socket_sendto(): unable to write to socket [2]: No such file or directory in <test script> on line 22 Warning: socket_sendto(): unable to write to socket [2]: No such file or directory in <test script> on line 22 Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' PHP Warning: socket_sendto(): unable to write to socket [2]: No such file or directory in <test script> on line 22 Warning: socket_sendto(): unable to write to socket [2]: No such file or directory in <test script> on line 22 Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' Received 'Ping!' Responded to sender with 'Pong!' -- Edit bug report at https://bugs.php.net/bug.php?id=76839&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=76839&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=76839&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=76839&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=76839&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=76839&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=76839&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=76839&r=needscript Try newer version: https://bugs.php.net/fix.php?id=76839&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=76839&r=support Expected behavior: https://bugs.php.net/fix.php?id=76839&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=76839&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=76839&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=76839&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=76839&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=76839&r=dst IIS Stability: https://bugs.php.net/fix.php?id=76839&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=76839&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=76839&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=76839&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=76839&r=mysqlcfg