Edit report at https://bugs.php.net/bug.php?id=62816&edit=1
ID: 62816
User updated by: xrstf-misc at yahoo dot com
Reported by: xrstf-misc at yahoo dot com
-Summary: stream_socket_accept does not block
+Summary: stream_socket_accept can't block infinitely
Status: Open
Type: Bug
Package: Sockets related
Operating System: Linux (ARM)
PHP Version: 5.4.5
Block user comment: N
Private report: N
New Comment:
(Changed bug title to better reflect the actual problem.)
Previous Comments:
------------------------------------------------------------------------
[2012-08-14 17:10:51] xrstf-misc at yahoo dot com
When doing a select() call before accepting, using an infinite timeout works.
Seems like select() correctly handles NULL as "no timeout".
So I can do (pseudocode):
if (1 === select(array($myListeningSocket), null, null, null /* <- timeout */))
{
$conn = accept($myListeningSocket);
}
------------------------------------------------------------------------
[2012-08-14 14:16:42] xrstf-misc at yahoo dot com
Oddly enough, using the "raw" socket functions works as expected.
Test code:
----------
$socket = socket_create_listen($port); // instead of stream_socket_server
$conn = socket_accept($socket); // instead of stream_socket_accept
Maybe there is something wrong with the timeout handling in the stream related
functions?
------------------------------------------------------------------------
[2012-08-14 13:25:02] xrstf-misc at yahoo dot com
Description:
------------
I'm opening a socket on 0.0.0.0, port 8080 (doesn't matter) and then I'm trying
to accept incoming connections. For this, the stream_socket_accept() function
should block and wait for connections.
This works on Windows and Linux (x86), but on ARM it fails. For some reason,
the
functions returns immediately, generating a warning:
stream_socket_accept(): accept failed: Connection timed out
Setting the timeout in my testscript to 0 doesn't change anything. Setting the
timeout to a non-infinite one like 10 seconds makes the function block
correctly
for 10 seconds.
The problem occurs in all PHP 5.4 versions. I didn't test 5.3 or earlier.
Test script:
---------------
<?php
$addr = "tcp://0.0.0.0:8080";
$errno = null;
$errstr = null;
print "\n";
print " > Creating socket @ $addr...";
$socket = stream_socket_server($addr, $errno, $errstr);
if ($socket === false) {
print " ERROR: $errstr ($errno)\n\n";
exit(2);
}
print " OK :)\n";
print " > Accepting incoming connections (listening)...";
$conn = stream_socket_accept($socket, -1);
print " ERROR: should not have reached this point!\n\n";
exit(1);
Expected result:
----------------
The script should stop and wait at the stream_socket_accept() call forever.
Actual result:
--------------
The function returns false and throws a warning.
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=62816&edit=1
