Php套接字，Apache和CentOS 6.3给出了权限被拒绝
[英]Php sockets, Apache and CentOS 6.3 gives Permission denied
问题描述
What I am trying to do is running a simple PHP script that checks if a game server is online and gets some info from it. 
我想要做的是运行一个简单的PHP脚本，检查游戏服务器是否在线并从中获取一些信息。 I am running exactly this same script on a local box with WAMP Server where i just uncommented php_openssl.dll and php_sockets.dll and - voila - it was working as expected. 我在WAMP服务器的本地机器上运行完全相同的脚本，我只是取消注释php_openssl.dll和php_sockets.dll，并且 - 瞧 - 它按预期工作。
But then came our production environment! 但后来我们的生产环境！ I usually work with Debian, but our host decided to install CentOS on our dedicated server because the NIC was failing in Debian, and it's been nothing but trouble since. 我通常和Debian一起工作，但是我们的主机决定在我们的专用服务器上安装CentOS，因为NIC在Debian中失败了，而且这只是麻烦了。
I overcame a few issues, and am left with this problem: how do I fix PHP sockets? 我克服了一些问题，并留下了这个问题：如何修复PHP套接字？ I read that I needed php-common, so I installed this with: 我读到我需要php-common，所以我安装了这个：
# yum install php-common
Then i checked phpinfo() and I got this 然后我检查了phpinfo() ，我得到了这个
'./configure' '--with-openssl' '--enable-sockets' ...
So this is looking good if you ask me, both openssl and sockets are installed and should be working, however this is not the case. 所以如果你问我这个看起来很好，openssl和socket都已安装并且应该正常工作，但事实并非如此。 I found this script here on Stack Overflow: 我在Stack Overflow上找到了这个脚本：
<?php
//just in case
if (!extension_loaded('sockets')) {
die('The sockets extension is not loaded.');
}
echo '<p><strong>Establishing connection...</strong></p>';
$socket = socket_create(AF_INET,SOCK_STREAM,0);
if (!socket_connect($socket, "stackoverflow.com", 80))
{
die('Socket error : '.socket_strerror(socket_last_error()));
}
echo '<p><strong>Connection successful!</strong></p>';
$request = join("\n",array(
"GET / HTTP/1.1",
"Connection: close",
"Host: stackoverflow.com",
"User-Agent: Mozilla/5.0 (Windows NT 6.1)",
"Accept: text/html,*/*;q=0.8",
""));
socket_write($socket,$request,strlen($request));
$response = socket_read($socket,2048);
echo "<p><strong>This is the received data : </strong></p>";
echo '<pre>'.htmlentities($response).'</pre>';
socket_close($socket);
What this outputs surprises me completely: 这个输出让我完全惊讶：
Establishing connection...
Connection successful!
This is the received data :
HTTP/1.0 408 Request Time-out
Cache-Control: no-cache
Connection: close
Content-Type: text/html
<html><body><h1>408 Request Time-out</h1>
Your browser didn't send a complete request in time.
</body></html>
But still, my script is not functioning ? 但是，我的剧本还没有运作？ :( I have disabled iptables with :(我已经禁用了iptables
# service iptables stop
just to be sure it's not a firewall issue. 只是为了确保它不是防火墙问题。 What happens is the following, when I open the page instead of a game servers name I get this: 会发生以下情况，当我打开页面而不是游戏服务器名称时，我得到了这个：
Warning: socket_connect(): unable to connect [13]: Permission denied in /var/www/test.php on line 9 <<<
This is the code I'm using, it's open source from xPaw, so I take no credit for it: 这是我正在使用的代码，它是xPaw的开源代码，所以我不相信它：
<?php
function queryserver( $IP, $Port = 25565, $Timeout = 2 )
{
$Socket = Socket_Create( AF_INET, SOCK_STREAM, SOL_TCP );
Socket_Set_Option( $Socket, SOL_SOCKET, SO_SNDTIMEO, array( 'sec' => (int)$Timeout, 'usec' => 0 ) );
Socket_Set_Option( $Socket, SOL_SOCKET, SO_RCVTIMEO, array( 'sec' => (int)$Timeout, 'usec' => 0 ) );
if( $Socket === FALSE || Socket_Connect( $Socket, $IP, (int)$Port ) === FALSE )
{
return FALSE;
}
Socket_Send( $Socket, "\xFE\x01", 2, 0 );
$Len = @Socket_Recv( $Socket, $Data, 256, 0 );
Socket_Close( $Socket );
if( $Len < 4 || $Data[ 0 ] !== "\xFF" )
{
return FALSE;
}
$Data = SubStr( $Data, 3 );
$Data = iconv( 'UTF-16BE', 'UTF-8', $Data );
if( $Data[ 1 ] === "\xA7" && $Data[ 2 ] === "\x31" )
{
$Data = Explode( "\x00", $Data );
return Array(
'HostName' => $Data[ 3 ],
'Players' => IntVal( $Data[ 4 ] ),
'MaxPlayers' => IntVal( $Data[ 5 ] ),
'Protocol' => IntVal( $Data[ 1 ] ),
'Version' => $Data[ 2 ]
);
}
$Data = Explode( "\xA7", $Data );
return Array(
'HostName' => SubStr( $Data[ 0 ], 0, -1 ),
'Players' => isset( $Data[ 1 ] ) ? IntVal( $Data[ 1 ] ) : 0,
'MaxPlayers' => isset( $Data[ 2 ] ) ? IntVal( $Data[ 2 ] ) : 0,
'Protocol' => 0,
'Version' => '1.3'
);
}
$test = queryserver('SERVERADDRESSHERE'); // (i tried multiple, which are all working @wamp)
$echo = $test['HostName'] . "<<< <br />";
echo $echo;
3 个解决方案
解决方案1
20 2013-04-03 15:02:48
在linuxbox中尝试此命令（以root身份）。
setsebool -P httpd_can_network_connect 1
解决方案2
0 2015-03-04 21:25:34
I had similar issues, so I figured I would drop an answer here also for the next person that runs into this. 我有类似的问题，所以我想我也会在这里找到答案的下一个人。 A way of going about it, without disabling/limiting SELinux, is to change the policy surrounding your httpd. 在不禁用/限制SELinux的情况下实现它的方法是更改httpd周围的策略。
Hope this saves 2 days for the next person reading this. 希望这为下一个阅读此内容的人节省2天。 lol 大声笑
chcon -R -t httpd_sys_content_t /var/www
chcon -R -t httpd_sys_content_rw_t /var/www/html
解决方案3
0
(Posted on behalf of the OP). （代表OP发布）。
I found the answer. 我找到了答案。 Seems SELinux is blocking the socket connections. 似乎SELinux正在阻止套接字连接。 Disabled SE Linux with '# setenforce Permissive' and it works now. 使用'#setenforce Permissive'禁用SE Linux，现在可以使用了。 Just in case anybody is experiencing the same strangeness. 以防任何人遇到同样的陌生感。
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