node-gamedig/protocols/starmade.js

module.exports = require('./core').extend({
	init: function() {
		this._super();
		this.encoding = 'latin1';
		this.byteorder = 'be';
	},
	run: function(state) {
		var self = this;

		var b = new Buffer([0x00,0x00,0x00,0x09,0x2a,0xff,0xff,0x01,0x6f,0x00,0x00,0x00,0x00]);

		this.tcpSend(b,function(buffer) {
			var reader = self.reader(buffer);

			if(buffer.length < 4) return false;
			var packetLength = reader.uint(4);
			if(buffer.length < packetLength+12) return false;

			var data = [];
			state.raw.data = data;

			reader.skip(2);
			while(!reader.done()) {
				var mark = reader.uint(1);
				if(mark == 1) {
					// signed int
					data.push(reader.int(4));
				} else if(mark == 3) {
					// float
					data.push(reader.float());
				} else if(mark == 4) {
					// string
					var length = reader.uint(2);
					data.push(reader.string(length));
				} else if(mark == 6) {
					// byte
					data.push(reader.uint(1));
				}
			}

			if(data.length < 9) {
				self.fatal("Not enough units in data packet");
				return true;
			}

			if(typeof data[3] == 'number') state.raw.version = data[3];
			if(typeof data[4] == 'string') state.name = data[4];
			if(typeof data[5] == 'string') state.raw.description = data[5];
			if(typeof data[7] == 'number') state.raw.numplayers = data[7];
			if(typeof data[8] == 'number') state.maxplayers = data[8];

			if('numplayers' in state.raw) {
				for(var i = 0; i < state.raw.numplayers; i++) {
					state.players.push({});
				}
			}

			self.finish(state);
			return true;
		});
	}
});