Php socket doesn't work

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I have a domain (ad-box.deslab.vn). I want to PHP socket to communicate with clients. However, After I run program, it has error:

****Warning: socket_bind(): unable to bind address [22]: Invalid argument in /home/vietchip/public_html/deslab.vn/ad-box/index.php on line 27 socket_bind() failed: reason: Invalid argument socket_bind() failed: reason: Invalid argument****

Link: ad-box.deslab.vn/index.php

Code:

<?php

error_reporting(E_ALL);

/* Allow the script to hang around waiting for connections. */
set_time_limit(0);

/* Turn on implicit output flushing so we see what we're getting
* as it comes in. */
ob_implicit_flush();

$address = "181.224.157.142";
$port = 10000;

// Create Socket
$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($sock === false) {
echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
}
if (!socket_set_option($sock, SOL_SOCKET, SO_REUSEADDR, 1)) {
echo socket_strerror(socket_last_error($sock));
exit;
}

// Bind socket to port
socket_bind($sock, $address, $port);
if (socket_bind($sock, $address, $port) === false) {
echo "socket_bind() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}

// Start listening for connection
socket_listen($sock, 5); // Maximum is 5 connection
if (socket_listen($sock, 5) === false) {
echo "socket_listen() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}

// Handling connection from client
do {
$msgsock = socket_accept($sock); // msgsock is a client connect to webserver
if ($msgsock === false) {
echo "socket_accept() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
break;
}

$request ="PHP said : you are sent " . socket_read($msgsock, 2048, PHP_BINARY_READ);
socket_write($msgsock, $request, strlen($request));
socket_close($msgsock); // Close connect of client
} while (true);
socket_close($sock); // Close socket of server
?>

Please help me fix this error. Thanks so much.

What I have tried:

I have tried a lot of method about 1 month, but it doesn't work

Posted 20-Mar-17 17:54pm

Member 13072690

Updated 20-Mar-17 21:58pm

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Jochen Arndt · Answer 1 · 2017-03-20T21:58:00

Solution 1

You are calling socket_bind twice:

PHP

// Bind socket to port
socket_bind($sock, $address, $port);
if (socket_bind($sock, $address, $port) === false) {
    echo "socket_bind() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}

The first call succeeds and the second fails because you can't bind to an IP address and port that is already in use. Remove the first call. Same for socket_listen below.

Posted 20-Mar-17 21:58pm

Jochen Arndt

Comments

Member 13072690 21-Mar-17 6:06am

Thanks for your response. This error is true, however after i corrected, this is error:
Gateway Timeout
The gateway did not receive a timely response from the upstream server or application.

Code Java of client:

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.Socket;
import java.net.UnknownHostException;

public class WebClient {
public static void main(String[] args) throws IOException {

String host ="ad-box.deslab.vn";

Socket s = null;
BufferedReader br = null;
BufferedWriter bw = null;
try {
s = new Socket(host, 10000);
br = new BufferedReader(new InputStreamReader(s.getInputStream()));
bw = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
} catch (UnknownHostException e) {
System.err.println("Don't know about host: hostname\n");
} catch (IOException e) {
System.err.println("Couldn't get I/O for the connection to: hostname\n");
}
// Send message to server
String message = "FETEL HCMUS";
// String message = "GET / HTTP/1.1\r\n\r\n";
// System.out.println(message);
bw.write(message);
bw.flush();
// Get response from server
String response = "";
while ((response = br.readLine()) != null) {
System.out.println(response);
}
bw.close();
br.close();
s.close();
}
}

Please help me more

Jochen Arndt 21-Mar-17 6:22am

Where does that error occur? On the client?

Then it seems to be a problem with the client code and you should raise a new question because it is not realy related to this question and there will be more people seeing the new question and might help.

Member 13072690 21-Mar-17 22:05pm

Ok, I will make a new question