Page 1 of 1

Problem with [function.socket-bind]

Posted: Fri May 16, 2014 3:18 am
by Devu
I write a code for listening data from multiple client but it shows error:- Warning: socket_bind() [function.socket-bind]: unable to bind address [99]: Cannot assign requested address in /home3/asgvcom/public_html/server/index.php on line 19
Could not bind to address

so please suggest how can i resolve this problem

Code: Select all

]<?php






// Set time limit to indefinite execution
set_time_limit (0);
// Set the ip and port we will listen on
$address = '10.0.0.1';
$port = 9000;
$max_clients = 10;
// Array that will hold client information
$client = array();
// Create a TCP Stream socket
$sock = socket_create(AF_INET, SOCK_STREAM, 0);
// Bind the socket to an address/port
socket_bind($sock, $address, $port) or die('Could not bind to address');
// Start listening for connections
socket_listen($sock);
// Loop continuously
while (true) {
    // Setup clients listen socket for reading
    $read[0] = $sock;
    for ($i = 0; $i < $max_clients; $i++)
    {
        if (isset($client[$i]))
        if ($client[$i]['sock']  != null)
            $read[$i + 1] = $client[$i]['sock'] ;
    }
    // Set up a blocking call to socket_select()
    $ready = socket_select($read, $write = NULL, $except = NULL, $tv_sec = NULL);
    /* if a new connection is being made add it to the client array */
    if (in_array($sock, $read)) {
        for ($i = 0; $i < $max_clients; $i++)
        {
            if (!isset($client[$i])) {
                $client[$i] = array();
                $client[$i]['sock'] = socket_accept($sock);
                echo("Accepting incomming connection...\n");
                break;
            }
            elseif ($i == $max_clients - 1)
                print ("too many clients");
        }
        if (--$ready <= 0)
            continue;
    } // end if in_array

    // If a client is trying to write - handle it now
    for ($i = 0; $i < $max_clients; $i++) // for each client
    {
        if (isset($client[$i]))
        if (in_array($client[$i]['sock'] , $read))
        {
            $input = socket_read($client[$i]['sock'] , 1024);
            if ($input == null) {
                // Zero length string meaning disconnected
                echo("Client disconnected\n");
                unset($client[$i]);
            }
            $n = trim($input);
            if ($n == 'exit') {
                echo("Client requested disconnect\n");
                // requested disconnect
                socket_close($client[$i]['sock']);
            }
            if(substr($n,0,3) == 'say') {
                //broadcast
                echo("Broadcast received\n");
                for ($j = 0; $j < $max_clients; $j++) // for each client
                {
                    if (isset($client[$j]))
                    if ($client[$j]['sock']) {
                        socket_write($client[$j]['sock'], substr($n, 4, strlen($n)-4).chr(0));
                    }
                }
            } elseif ($input) {
                echo("Returning stripped input\n");
                // strip white spaces and write back to user
                $output = ereg_replace("[ \t\n\r]","",$input).chr(0);
                socket_write($client[$i]['sock'],$output);
            }
        } else {
            // Close the socket
            if (isset($client[$i]))
            echo("Client disconnected\n");
            if ($client[$i]['sock'] != null){ 
                socket_close($client[$i]['sock']); 
                unset($client[$i]); 
            }
        }
    }
} // end while
// Close the master sockets
echo("Shutting down\n");
socket_close($sock);


?>


Re: Problem with [function.socket-bind]

Posted: Fri May 16, 2014 12:44 pm
by requinix
Are you running this from the 10.0.0.1 machine? Is there something already listening on that port?