rcon.dart

import 'dart:io';
import 'dart:convert';
import 'dart:typed_data';

Socket socket;
int _id = 1;

const int SERVERDATA_AUTH = 3;
const int SERVERDATA_AUTH_RESPONSE = 2;
const int SERVERDATA_EXECCOMMAND = 2;
const int SERVERDATA_RESPONSE_VALUE = 0;

void main() async {
    socket = await Socket.connect('hexah.net', 27015);
    await socket.listen(onSocketData, onError: onError, onDone: onDone);
    await _write(SERVERDATA_AUTH, 'foo');
}


void _write(int type, String body) async {

    var bodyASCII = ascii.encode(body); //Get ASCII string with Null terminator

    // Should I use this or the other way? ??
    var size = bodyASCII.length + 14;
    var buffer = new Int8List(size).buffer;
    var bdata = new ByteData.view(buffer);

    bdata.setInt32(0, size - 4, Endian.little); //Byte requests length (32bit le signed int).
    bdata.setInt32(4, _id, Endian.little); //Any integer (32bit le signed int).
    bdata.setInt32(8, type, Endian.little); //Valid values: SERVERDATA_* (32bit le signed int).
    int writepos = 12;
    await bodyASCII.forEach((element) {
        bdata.setInt8(writepos, element);
        writepos +=1;
    });
    bdata.setInt16(size-2, 0, Endian.little); //Write the null terminators
    await socket.write(bdata);
    _id++;
}

void onSocketData(var data){
    print(data);
}

void onError(var data, StackTrace stack){
    print(stack);
}

void onDone(){
    print('Connection terminated');
}