ID: 43695
User updated by: nicolas dot legland at free dot fr
Reported By: nicolas dot legland at free dot fr
Status: Open
Bug Type: Streams related
Operating System: Windows XP Professional SP2
PHP Version: 5.3CVS-2007-12-28 (snap)
New Comment:
Description:
------------
When using sockets through the "sockets" extension, everything works
fine with no delay to notice.
Reproduce code:
---------------
<?php
// Load socket extension
dl((('dll' === PHP_SHLIB_SUFFIX) ? 'php_' :
'').'sockets.'.PHP_SHLIB_SUFFIX);
// Send a [SYN] packet to scanme.nmap.org:70
$time = microtime(true);
$resource = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_set_nonblock($resource);
@socket_connect($resource, gethostbyname('scanme.nmap.org'), 70);
echo 'Open '.number_format((microtime(true) - $time), 6).PHP_EOL;
// Wait 3 seconds for a [SYN, ACK] packet
$time = microtime(true);
$read = $write = $except = array($resource);
socket_select($read, $write, $except, 3);
echo 'Wait '.number_format((microtime(true) - $time), 6).' read
'.count($read).', write '.count($write).', except
'.count($except).PHP_EOL;
// Cancel connection
$time = microtime(true);
socket_close($resource);
echo 'Close '.number_format((microtime(true) - $time), 6).PHP_EOL;
?>
Result:
-------
Open 0.030620
Wait 1.518440 read 0, write 0, except 1
Close 0.000108
Previous Comments:
------------------------------------------------------------------------
[2007-12-28 08:37:12] nicolas dot legland at free dot fr
Description:
------------
Asynchronously connecting a TCP socket stream to a filtered port times
out, but closing the resource using fclose() blocks for 0.5 second.
Asynchronously connecting a TCP socket stream to a closed port ends up
with the server explicitly refusing the connection by a RST ACK packet.
Using stream_select() returns the stream resource as having had an
except but trying to close the resource using fclose() blocks for 0.5
second too.
No network transfer was captured by Wireshark apart from the initial
SYN packet in either case. Using fclose() on a successfully
asynchronously connected TCP socket stream to an open port returns
instantaneously.
If you don't explicitly fclose() the resources of failed connections,
the same 0.5 seconds lag appears at the end of the script execution for
each one. PHP probably cleanly frees resources at shutdown, but it can
reach several seconds when several sockets have failed.
When using non-blocking BSD socket with the sockets extension, no delay
of any kind is noticed.
Reproduce code:
---------------
<?php
// Send a [SYN] packet to scanme.nmap.org:70
$time = microtime(true);
$resource =
stream_socket_client('tcp://'.gethostbyname('scanme.nmap.org').':70',
$null = null, $null, 0, STREAM_CLIENT_ASYNC_CONNECT |
STREAM_CLIENT_CONNECT);
stream_set_blocking($resource, 0);
echo 'Open '.number_format((microtime(true) - $time), 6).PHP_EOL;
// Wait 3 seconds for a [SYN, ACK] packet
$time = microtime(true);
$read = $write = $except = array($resource);
stream_select($read, $write, $except, 3);
echo 'Wait '.number_format((microtime(true) - $time), 6).' read
'.count($read).', write '.count($write).', except
'.count($except).PHP_EOL;
// Cancel connection
$time = microtime(true);
fclose($resource);
echo 'Close '.number_format((microtime(true) - $time), 6).PHP_EOL;
?>
Expected result:
----------------
Open 0.010317
Wait 1.588449 read 0, write 0, except 1
Close 0.000099
Actual result:
--------------
Open 0.010002
Wait 1.547396 read 0, write 0, except 1
Close 0.510161
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=43695&edit=1
