113 lines
3.0 KiB
JavaScript
113 lines
3.0 KiB
JavaScript
var dgram = require('dgram');
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var net = require('net');
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var server = dgram.createSocket("udp4");
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server.bind( function() {
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server.setBroadcast(true)
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server.setMulticastTTL(128);
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broadcastNew();
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});
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server.on('message', function (message, remote) {
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console.log('Got a response.');
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var server = {
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address: remote.address,
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type: message.readInt32LE(0),
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port: message.readInt16LE(8),
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gatewayType: message.readUInt8(10),
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gatewaySubtype: message.readUInt8(11),
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gatewayName: message.toString('utf8', 12, 28)
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};
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console.log(' type: ' + server.type + ', host: ' + server.address + ':' + server.port + ', identified as ' + server.gatewayName);
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if (server.type === 2) {
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connectTo(server);
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}
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});
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function broadcastNew() {
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var message = new Uint8Array(8);
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message[0] = 1;
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server.send(message, 0, message.length, 1444, "255.255.255.255");
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console.log("Looking for ScreenLogic hosts...");
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}
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function connectTo(server) {
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console.log("connecting...");
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var client = new net.Socket();
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client.connect(server.port, server.address, function() {
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console.log('connected');
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console.log('sending connection string...');
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var buf = Buffer.from('CONNECTSERVERHOST\r\n\r\n');
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client.write(buf);
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console.log('sending challenge string...');
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buf = Buffer.alloc(8);
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buf.writeUInt16LE(14, 2);
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client.write(buf);
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console.log('sending login string...');
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buf = Buffer.alloc(72);
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buf.writeUInt16LE(0);
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buf.writeUInt16LE(27, 2);
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buf.writeInt32LE(64, 4); // length
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buf.writeInt32LE(348, 8); // schema
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buf.writeInt32LE(0, 12); // connection type
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var name = 'ScreenLogicConnect library';
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buf.writeInt32LE(name.length, 16);
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buf.write(name, 20);
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var pos = 20 + name.length;
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for (var i = 0; i < 4 - (name.length % 4); i++) {
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buf.writeUInt8(0, 20 + name.length + i);
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pos = pos + 1;
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}
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buf.writeInt32LE(16, pos);
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pos += 4;
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pos += 16;
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buf.writeInt32LE(2, pos);
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client.write(buf);
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console.log('sending pool status query...');
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buf = Buffer.alloc(12);
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buf.writeUInt16LE(12526, 2);
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buf.writeInt32LE(4, 4);
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client.write(buf);
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console.log('sending controller config query...');
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buf = Buffer.alloc(16);
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buf.writeUInt16LE(12532, 2);
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buf.writeInt32LE(8, 4);
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client.write(buf);
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setTimeout(function() {
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console.log('destroying');
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client.destroy();
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}, 3000);
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});
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client.on('close', function() {
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console.log('closed');
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});
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client.on('data', function(msg) {
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console.log('received message of length ' + msg.length);
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var msgType = msg.readInt16LE(2);
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if (msgType === 15) {
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console.log(" it's a challenge response");
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} else if (msgType === 28) {
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console.log(" it's a login response");
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} else if (msgType === 12527) {
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console.log(" it's pool status");
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} else if (msgType === 12533) {
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console.log(" it's controller configuration");
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}
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});
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}
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/* debug print full buffer contents:
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for (const value of buf.values()) {
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console.log(value.toString(16));
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}
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*/
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