#45808 [NEW]: stream_socket_enable_crypto() blocks and eats CPU

From: Date: Wed, 13 Aug 2008 17:41:01 +0000
Subject: #45808 [NEW]: stream_socket_enable_crypto() blocks and eats CPU
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-128019@lists.php.net to get a copy of this message 
From:             six at aegis-corp dot org
Operating system: Linux 2.6
PHP version:      5.3.0alpha1
PHP Bug Type:     Streams related
Bug description:  stream_socket_enable_crypto() blocks and eats CPU

Description:
------------
The documentation says about stream_socket_enable_crypto :

Returns TRUE on success, FALSE if negotiation has failed or 0 if there
isn't enough data and you should try again (only for non-blocking sockets).


In practice, if you feed a non blocking server socket to it, it will block
and consume lots of CPU until the SSL/TLS handshake is done or the client
connection is dropped.

Reproduce code:
---------------
<?php

$s = stream_socket_server("tcp://127.0.0.1:8888");
$c = stream_socket_accept($s);
stream_set_blocking($c, false);

$ret = stream_socket_enable_crypto($c, true,
STREAM_CRYPTO_METHOD_TLS_SERVER);

var_dump($ret);

?>

then just "telnet localhost 8888" from another term

Expected result:
----------------
script should print "int(0)" and exit

Actual result:
--------------
script blocks at the stream_socket_enable_crypto() call and is stuck in a
CPU consuming loop until the client connection is either handshaked or
dropped.

-- 
Edit bug report at http://bugs.php.net/?id=45808&edit=1
-- 
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=45808&r=trysnapshot52
Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=45808&r=trysnapshot53
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=45808&r=trysnapshot60
Fixed in CVS:                 http://bugs.php.net/fix.php?id=45808&r=fixedcvs
Fixed in release:             http://bugs.php.net/fix.php?id=45808&r=alreadyfixed
Need backtrace:               http://bugs.php.net/fix.php?id=45808&r=needtrace
Need Reproduce Script:        http://bugs.php.net/fix.php?id=45808&r=needscript
Try newer version:            http://bugs.php.net/fix.php?id=45808&r=oldversion
Not developer issue:          http://bugs.php.net/fix.php?id=45808&r=support
Expected behavior:            http://bugs.php.net/fix.php?id=45808&r=notwrong
Not enough info:              http://bugs.php.net/fix.php?id=45808&r=notenoughinfo
Submitted twice:              http://bugs.php.net/fix.php?id=45808&r=submittedtwice
register_globals:             http://bugs.php.net/fix.php?id=45808&r=globals
PHP 4 support discontinued:   http://bugs.php.net/fix.php?id=45808&r=php4
Daylight Savings:             http://bugs.php.net/fix.php?id=45808&r=dst
IIS Stability:                http://bugs.php.net/fix.php?id=45808&r=isapi
Install GNU Sed:              http://bugs.php.net/fix.php?id=45808&r=gnused
Floating point limitations:   http://bugs.php.net/fix.php?id=45808&r=float
No Zend Extensions:           http://bugs.php.net/fix.php?id=45808&r=nozend
MySQL Configuration Error:    http://bugs.php.net/fix.php?id=45808&r=mysqlcfg

Thread (13 messages)

« previous php.bugs (#128019) next »