Bug #74834 [Com]: stream_socket_shutdown don't work!

From: Date: Fri, 30 Jun 2017 10:42:09 +0000
Subject: Bug #74834 [Com]: stream_socket_shutdown don't work!
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-209739@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=74834&edit=1

 ID:                 74834
 Comment by:         kelunik@php.net
 Reported by:        452476865 at qq dot com
 Summary:            stream_socket_shutdown don't work!
 Status:             Open
 Type:               Bug
 Package:            Streams related
 Operating System:   ubuntu
 PHP Version:        5.6.30
 Block user comment: N
 Private report:     N

 New Comment:

No, stream_socket_shutdown doesn't close a connection, use fclose for that.


Previous Comments:
------------------------------------------------------------------------
[2017-06-30 10:39:21] 452476865 at qq dot com

Description:
------------
stream_socket_shutdown don't close the TCP connection.

this cause TCP connection overflow when high concurrency on WEB server.

i think stream_socket_shutdown should close TCP connection, not just TIME_WAIT status.


Test script:
---------------
<?php

function one($host, $port){
	$host = 'tcp://' . $host . ':' . $port;
        $socket = @stream_socket_client(
            $host,
            $errorNumber,
            $errorDescription,
            ini_get("default_socket_timeout")
        );
	stream_socket_shutdown($socket, STREAM_SHUT_RDWR);
}

$host = '192.168.2.243';
$port = 7000;

for($i=0; $i<100; $i++){
    one($host, $port);
}

echo "done";
?>

Expected result:
----------------
netstat -an |grep '192.168.2.243'

return :

none

Actual result:
--------------
netstat -an |grep '192.168.2.243'

return :

tcp        0      0 192.168.2.66:57336      192.168.2.243:7000      TIME_WAIT  
tcp        0      0 192.168.2.66:57282      192.168.2.243:7000      TIME_WAIT  
tcp        0      0 192.168.2.66:57222      192.168.2.243:7000      TIME_WAIT  
tcp        0      0 192.168.2.66:57298      192.168.2.243:7000      TIME_WAIT  
tcp        0      0 192.168.2.66:57236      192.168.2.243:7000      TIME_WAIT  
tcp        0      0 192.168.2.66:57318      192.168.2.243:7000      TIME_WAIT  
tcp        0      0 192.168.2.66:57398      192.168.2.243:7000      TIME_WAIT


------------------------------------------------------------------------



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