CODEWITHSUNDEEP
phpnode.jssocketsudp
maca134
maca134

Reputation: 41

Node.js UDP Stream

Im trying to "port" some code from PHP into Node and im struggling to find out how to get it working. Im trying too connect to an RCON server over UDP. Here is a simplified version of the PHP version which works:

$address = '1.2.3.4:1234';
$password = 'password';

$socket = stream_socket_client('udp://' . $address, $errno, $errstr);
stream_set_blocking($socket, 0);

$loginRequest = chr(0x45) . $password;
stream_socket_sendto($socket, $loginRequest, 0, $address);
echo 'RCON Login Request Sent' . PHP_EOL;
echo $loginRequest . PHP_EOL;
echo PHP_EOL;

do {
    $data = stream_socket_recvfrom($socket, 127, 0, $address);
} while (!$data);
echo 'RCON Received Response' . PHP_EOL;
echo $data . PHP_EOL;

Here is what I have got in Node, which doesnt seem to do anything. I dont even get any acknowledgment of a connection from the server.

var address = '1.2.3.4';
var port = '1234';
var password = 'password';

var socket = require('dgram').createSocket('udp4');

socket.on('message', function (msg, from) {
    console.log(msg);
});

socket.on('listening', function () {
    var loginPacket = new Buffer(String.fromCharCode(0xff) + password);
    socket.send(loginPacket, 0, loginPacket.length, port, address, function (err, bytes) {
        console.log('packet sent');
    });
});

socket.on('error', function (err) {
    console.log('ERROR: ', err);
});

socket.bind(0);

Any help with this would be great! maca134

Upvotes: 2

Views: 2262

Answers (2)

mscdex
mscdex

Reputation: 106696

The default encoding for passing a string to the Buffer constructor is not binary, so you need to pass binary as the encoding: new Buffer('\xFF' + password, 'binary'). The first 0xFF byte causes issues with the default utf8 encoding. Also, another difference is you're using 0xFF in node whereas you're using 0x45 in PHP.

Upvotes: 1

Daniel
Daniel

Reputation: 38771

socket.bind takes a port and optional host. You're supplying port 0.

I'm not sure which port you want to listen on but for sake of example I'll use 888.

socket.bind(888);

Upvotes: 0

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