Rcon was not working
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167c27848a
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3 changed files with 153 additions and 76 deletions
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@ -1,95 +1,124 @@
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import 'dart:convert';
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import 'dart:io';
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import 'dart:typed_data';
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class RCONPacket {
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int id;
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int type;
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String body;
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import 'RconDecoder.dart';
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RCONPacket(this.id, this.type, this.body);
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abstract class RconClient {
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void exit();
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List<int> toBytes() {
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List<int> bodyBytes = utf8.encode(body);
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int size = 10 + bodyBytes.length;
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List<int> packet = [];
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packet.addAll(_intToBytes(size));
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packet.addAll(_intToBytes(id));
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packet.addAll(_intToBytes(type));
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packet.addAll(bodyBytes);
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packet.addAll([0, 0]);
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return packet;
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}
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void send(String cmd);
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static RCONPacket fromBytes(List<int> bytes) {
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int size = _bytesToInt(bytes.sublist(0, 4));
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int id = _bytesToInt(bytes.sublist(4, 8));
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int type = _bytesToInt(bytes.sublist(8, 12));
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String body =
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utf8.decode(bytes.sublist(12, size + 2).sublist(0, size - 10));
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return RCONPacket(id, type, body);
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}
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factory RconClient() => RconClientImpl();
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static List<int> _intToBytes(int value) {
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return [
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value & 0xFF,
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(value >> 8) & 0xFF,
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(value >> 16) & 0xFF,
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(value >> 24) & 0xFF
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];
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}
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static int _bytesToInt(List<int> bytes) {
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return bytes[0] | (bytes[1] << 8) | (bytes[2] << 16) | (bytes[3] << 24);
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}
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Stream<String> connect(String host, int port, String password);
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}
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class RCONClient {
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String host;
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int port;
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String password;
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class RconType {
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/// RCON Packet Type 0: Server response
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static const int SERVERDATA_RESPONSE_VALUE = 0;
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/// RCON Packet Type 2: Server auth response
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static const int SERVERDATA_AUTH_RESPONSE = 2;
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/// RCON Packet Type 2: Client execute command
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static const int SERVERDATA_EXECCOMMAND = 2;
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/// RCON Packet Type 3: Client send authentication data
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static const int SERVERDATA_AUTH = 3;
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}
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/// Client for the rcon protocol
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class RconClientImpl implements RconClient {
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/// Socket used to write and read TCP packets.
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late Socket _socket;
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late int _requestId;
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RCONClient(this.host, this.port, this.password) {
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_requestId = 0;
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/// Disconnect from the a RCON server.
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///
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/// Usage:
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///
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/// ```dart
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/// RconClient client = RconClient.connect(print, 'localhost', '25575', 'password');
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/// client.exit();
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/// ```
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@override
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void exit() => _socket.destroy();
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/// Send commands
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@override
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void send(String cmd) => _send(RconType.SERVERDATA_EXECCOMMAND, cmd);
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/// Authenticate to the server
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void _authenticate(String password) =>
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_send(RconType.SERVERDATA_AUTH, password);
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/// Build and send a packet to the rcon server
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///
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/// | Field | Type | Value |
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/// |--------------|-------------------------------------|-------|
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/// | Size | 32-bit little-endian Signed Integer | |
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/// | ID | 32-bit little-endian Signed Integer | |
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/// | Type | 32-bit little-endian Signed Integer | |
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/// | Body | Null-terminated ASCII String | |
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/// | Empty String | Null-terminated ASCII String | 0x00 |
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void _send(int type, String payload) {
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final Uint8List outSize = Uint8List(4);
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final Uint8List outId = Uint8List(4); // Empty: 00 00 00 00
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final Uint8List outType = Uint8List(4);
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// Write type in the Type field
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final ByteData typeData = ByteData.view(outType.buffer);
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typeData.setInt32(0, type, Endian.little);
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// Build the body
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final List<int> outBody = utf8.encode(payload);
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// Build ID + Type + Body + Empty String
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final Uint8List outPacketBody =
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Uint8List.fromList(outId + outType + outBody + Uint8List(2));
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// Calculate the Size field
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final ByteData sizeData = ByteData.view(outSize.buffer);
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sizeData.setInt32(0, outPacketBody.length, Endian.little);
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// Build the packet
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final Uint8List packet = Uint8List.fromList(outSize + outPacketBody);
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// View packet
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// print(packet);
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// print(packet.map((int i) => i.toRadixString(16)).toList());
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// print(utf8.decode(packet));
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// Send the packet
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_socket.add(packet);
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}
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Future<void> connect() async {
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/// Connect to the a RCON server.
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///
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/// Usage:
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///
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/// ```dart
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/// final RconClient client = RconClient();
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/// final Stream<String> response = client.connect(
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/// 'localhost',
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/// 25575,
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/// 'password',
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/// );
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/// ```
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@override
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Stream<String> connect(String host, int port, String password) async* {
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print("Trying to connect...");
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_socket = await Socket.connect(host, port);
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if (await _authenticate()) {
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print('Authenticated successfully');
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} else {
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print('Authentication failed');
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}
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}
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Future<bool> _authenticate() async {
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RCONPacket packet = RCONPacket(_requestId++, 3, password);
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_socket.add(packet.toBytes());
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await _socket.flush();
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RCONPacket response = await _readPacket();
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return response.id == packet.id && response.type == 2;
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}
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print("Connected.");
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Future<RCONPacket> _readPacket() async {
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List<int> sizeBytes = await _socket.first;
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int size = RCONPacket._bytesToInt(sizeBytes);
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List<int> dataBytes = [];
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while (dataBytes.length < size) {
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dataBytes.addAll(await _socket.first);
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}
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return RCONPacket.fromBytes(sizeBytes + dataBytes);
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}
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final Stream<String> stream = _socket.transform(RconDecoder());
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Future<String> sendCommand(String command) async {
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RCONPacket packet = RCONPacket(_requestId++, 2, command);
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_socket.add(packet.toBytes());
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await _socket.flush();
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RCONPacket response = await _readPacket();
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return response.body;
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}
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print("Trying to authenticate");
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void close() {
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_socket.close();
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_authenticate(password);
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yield* stream;
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}
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}
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48
lib/utils/rcon/RconDecoder.dart
Normal file
48
lib/utils/rcon/RconDecoder.dart
Normal file
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@ -0,0 +1,48 @@
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import 'dart:convert';
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import 'dart:io';
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import 'dart:typed_data';
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import 'Rcon.dart';
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class RconDecoder extends Converter<Uint8List, String> {
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/// Transform packets into a String.
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///
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/// | Field | Type | Value |
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/// |--------------|-------------------------------------|-------|
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/// | Size | 32-bit little-endian Signed Integer | |
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/// | ID | 32-bit little-endian Signed Integer | |
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/// | Type | 32-bit little-endian Signed Integer | |
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/// | Body | Null-terminated ASCII String | |
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/// | Empty String | Null-terminated ASCII String | 0x00 |
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@override
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String convert(Uint8List data) {
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final byteData = ByteData.sublistView(data);
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// final inLength = byteData.getInt32(0, Endian.little);
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final inId = byteData.getInt32(4, Endian.little);
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final inType = byteData.getInt32(8, Endian.little);
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final inBody = data.sublist(12);
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if (inType == RconType.SERVERDATA_AUTH_RESPONSE) {
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if (inId == -1) {
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throw const SocketException('Bad login.');
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} else if (inId == 0) {
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return 'Authentication successful. You can now write commands.';
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}
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}
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return utf8.decode(inBody);
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}
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@override
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Sink<Uint8List> startChunkedConversion(Sink<String> sink) {
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return ChunkedConversionSink.withCallback((chunk) {
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for (final data in chunk) {
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sink.add(convert(data));
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}
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});
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}
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// Override the base class's bind, to provide a better type.
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@override
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Stream<String> bind(Stream<Uint8List> stream) => super.bind(stream);
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}
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@ -1,6 +1,6 @@
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name: libac_dart
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description: "Aria's Creations code library"
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version: 1.0.28
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version: 1.0.29
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homepage: "https://zontreck.com"
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