I have a question about pinging certain game servers to see if they are alive or not, most work fine with just your standard PHP ping but others are from steam... and steam is making it more difficult for me to just send a ping to see if it is alive or not, i tried Steam Condenser but... have no idea how to use it since there is no documentation.
my question
how can i ping UDP game servers such as Arma 2, Arma 3, etc. this is what i tried:
$host = '128.0.0.1';
$port = 1234;
$waitTimeoutInSeconds = 7;
if($fp = fsockopen("udp://".$host,$port,$errCode,$errStr))
{
echo 'Online';
}
else
{
echo 'Offline';
}
the problem with that is that i always get "true" returned no matter what IP or port i use, how can i make this work?
EDIT
I also tried
$host = '128.0.0.1';
$port = 1234;
$waitTimeoutInSeconds = 7;
if($fp = fsockopen("udp://".$host,$port,$errCode,$errStr))
{
$write = fwrite($fp,"x00");
if (!$write)
{
echo 'offline';
}
else
{
echo 'online';
}
}
else
{
echo 'offline';
}
fclose($fp);
however with this one i get error code 0 which seems to be a problem with the initializing of the socket?
I tried this one, by removing the "udp://" :
$host = '128.0.0.1';
$port = 1234;
$waitTimeoutInSeconds = 7;
if($fp = fsockopen($host,$port,$errCode,$errStr))
{
echo 'Online';
}
else
{
echo 'Offline';
}
And it works. Here is the return text :
Warning: fsockopen(): unable to connect to 128.0.0.1:1234 (A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. ) in C:\xampp\htdocs\test.php on line 6
Offline
It don't think you should put the "udp://" because just using the port number is enough.
What about using the OS's ping utility, execute terminal ping command using PHP. You can read it here : http://php.net/manual/en/function.shell-exec.php
Related
I made this code which is supposed to show whether the program running on the specified port is running.
Now the problem is that it shows "Offline" when my port is clearly open. It however does show online for Google on port 80. What am I doing wrong?
$server = '77.251.97.234';
$port = 43594;
$timeOut = 1;
if ($socket = #fsockopen($server, $port, $errorNo, $errorStr, $timeOut)) {
echo '<span style="color:green;">Online</span>';
} else {
echo '<span style="color:red;">Offline</span>';
}
i've seen other people with this problem, but maybe i can explain my situation and you can point out where the issue might be.
im getting a 'Warning : socket_bind(): unable to bind address [98]: Address already in use' error.
the situation is this. I am using a web application to trigger another program to perform tasks (from a webpage interface). The results of that program are sent through a socket to my web application that is listening on a socket.
first i create and open the socket, then i trigger the other program, then when that program is finished it should send its results back through the socket.
it works fine the first try. Then the next try (i trigger this process many times) i get the above socket bind error when trying to open the socket, obviously the socket is still bound.
i wait about a minute and i can successfully run the process again. I think the socket connection timesout.
I dont know if the problem is because of the way i have structure my socket code, or if the problem is in the external program that i am triggering. I dont know much about the internals of the external program as its a jar file built by someone else.
heres the code i use for creating and handling the socket. I just used an example on php.net and altered it for my needs.
$port1 = 15000;
// configure the socket
error_reporting(E_ALL);
set_time_limit(0);
ob_implicit_flush();
$address = '127.0.0.1';
$port2 = 54321;
$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$error = 'none';
if ($sock) {
if (socket_bind($sock, $address, $port2)) {
if (socket_listen($sock, 5)) {
// trigger external process
if (start_calibration()) {
$buf = array();
// listen to the socket for incoming messages
do {
// if incomming connection is not accepted break out and close socket
if (($msgsock = socket_accept($sock)) === false) {
break;
}
do {
// if cant read socket then break out and close socket
if (false === ($buf = socket_read($msgsock, 2048, PHP_BINARY_READ))) {
break 2;
}
$buf = unpack('C*', $buf);
socket_close($msgsock);
break 2;
} while (true);
socket_close($msgsock);
} while (true);
socket_close($sock);
// code to handle data recieved through the socket
}
else {
// start_calibration failed
$error = 'start_calibration failed';
socket_close($sock);
}
}
else {
// socket_listen failed
$error = 'socket_listen failed';
socket_close($sock);
}
}
else {
// socket_bind failed
$error = 'socket_bind failed';
socket_close($sock);
}
}
else {
// socket_create failed
$error = 'socket_create failed';
}
$data['error'] = $error;
echo json_encode($data);
also, is there is a more efficient way to handle the closing of sockets if there is problems with lines like 'socket_bind', 'socket_listen' etc?
Did you try to set the flag SO_REUSEADDR on your socket?
There's a sample in the socket_set_option's documentation.
I'm coding a php socket server script which is running on ubuntu.
It works well, clients can connect/disconnect to this server.
But the server is shutting down silently when a client connect to this server that didn't have any client connected for a long time.
I setted up timeout to 0 (unlimited) but the server is stoping without any errors or messages... like this.
root#exfl:/home/projectap/sec/server_core# php socket_server.php
[exfl.kr] Starting AbsolutePitch socket server...
[2014.06.21 16:50:58] Server is listening. PID: 6442
[2014.06.21 17:28:48] Client [192.168.0.1:8795] connected to the server.
root#exfl:/home/projectap/sec/server_core#
I coded for this server like this.
<?php
set_time_limit(0);
error_reporting(E_ALL);
ini_set("memory_limit","2048M");
ini_set("max_execution_time", "0");
if(posix_getpid() == true) {
echo "[exfl.kr] Starting AbsolutePitch socket server...\n";
} else {
echo getTimeToStr()."Server is already running.\n";
}
$cSock = array();
$socketsInformation = array();
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$bind = socket_bind($socket, "0.0.0.0", "24180");
$listen = socket_listen($socket, 5);
echo getTimeToStr()."Server is listening. PID: ".posix_getpid()."\n";
while(true) {
$sockArr = array_merge(array($socket), $cSock);
if(socket_select($sockArr, $tWrite = null, $tExcept = null, null) > 0) {
foreach($sockArr as $sock){
if($sock == $socket){
$tSock = socket_accept($socket);
socket_getpeername($tSock, $sockIp, $sockPort);
array_push($cSock, $tSock);
array_push($socketsInformation, array("SOCKETINDEX"=>(count($cSock)-1), "IP"=>$sockIp, "USERID"=>"", "STATUS"=>"", "AUTH"=>false));
echo getTimeToStr()."Client [".$sockIp.":".$sockPort."] connected to the server.\n";
} else {
...
}
}
}
}
echo getTimeToStr()."Server closed.\n";
...
?>
When the server stops suddenly, it isn't outputing a "Server closed" message..
Please help.
Sorry for my bad English.
You may want to try socket_set_options() with SO_KEEPALIVE. To know more about your options use the socket_get_options page:
https://www.php.net/manual/en/function.socket-get-option.php
To know more about the usage of socket_set_options() use:
https://www.php.net/manual/en/function.socket-set-option.php
Issue at Hand: Intercepting a print request and modifying the data within the job to add content to it.
Solution so far: Here's the solution that has worked for the windows xp machines
1. Redirect the default printer to a raw TCP/IP port say 9100.
2. Write a basic socket server which listens on the port 9100 and accepts connections when they occur.
3. Read from the socket and modify the content before writing to a virtual printer which redirects to actual port that the default printer was on.
Problem: Steps 1 and 2 do not seem to work on windows 7.. Can someone please help..?
Here is the socket server code(very basic)...
<?php
// set some variables
$host = "127.0.0.1";
$port = 9100;
// don't timeout!
set_time_limit(0);
if(($sock = socket_create(AF_INET, SOCK_STREAM, 0)) < 0)
{
echo "failed to create socket: ".socket_strerror($sock)."\n";
exit();
}
if(($ret = socket_bind($sock, $host, $port)) < 0)
{
echo "failed to bind socket: ".socket_strerror($ret)."\n";
exit();
}
if( ( $ret = socket_listen( $sock, 0 ) ) < 0 )
{
echo "failed to listen to socket: ".socket_strerror($ret)."\n";
exit();
}
socket_set_nonblock($sock);
echo "waiting for clients to connect\n";
while (true)
{
$connection = #socket_accept($sock);
if ($connection === false)
{
usleep(100);
}elseif ($connection > 0)
{
//handle_client($sock, $connection);
}else
{
echo "error: ".socket_strerror($connection);
die;
}
}
So at this point, when a print job happens to a default printer, the server should accept the connection but that is not the case. A basic socket client which performs a socket_create, socket_connect and sends a socket_write works fine.. But the same thing does not happen when a print job to the same port is being sent. It works fine on windows XP. Can someone please help?
Found that on windows 7 IPV6 sockets are used by printers by default. If you run a microsoft fixit to prefer IPV4 over IPV6 or create a IPV6 socket it should work. – user2693294
I'm trying to use a script to query if a Shoutcast Server is online or offline. The code below is what I'm using at the moment.
$vt_ip = "ip";
$vt_port = "port";
$output = #fsockopen($vt_ip, $vt_port, $errno, $errstr, 2);
if (!$output) {
echo "<FONT CLASS=f1 COLOR=#DD0000><B>OFFLINE</B></FONT>";
} else {
echo "<FONT CLASS=f1 COLOR=#00DD00><B>ONLINE</B></FONT>";
}
#fclose($output);
But it doesn't update, it is stuck on Offline status.
Any help would be greatly appreciated.
$vt_ip = "ip";
$vt_port = "port";
$conn = fsockopen($vt_ip, $vt_port, $errno, $errstr, 2);
if(!$conn){
echo $errno;
}else{
fwrite($conn, "\n");
$output = fread($conn, 1024);
fclose($conn);
if ($output == "") {
echo "<FONT CLASS=f1 COLOR=#DD0000><B>OFFLINE</B></FONT>";
} else {
echo "<FONT CLASS=f1 COLOR=#00DD00><B>ONLINE</B></FONT>";
}
}
It isn't enough to simply make a TCP connection to a SHOUTcast server to determine if the stream is working. In fact, a SHOUTcast server that is running will always accept yourTCP connection, even if there is no stream for playback.
You must connect, request the stream, and then check the return status code. Once connected, send this data:
GET /; HTTP/1.0
Follow that by a \r\n\r\n. Now, read data back from the stream until you get the \r\n\r\n. Then, you can disconnect. Check the status code from the first response line and see if it's 200. If it is, you've got an active stream.