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| 1 | +using System; |
| 2 | +using System.Collections.Generic; |
| 3 | +using System.Net; |
| 4 | +using System.Text; |
| 5 | +using UnityEngine; |
| 6 | +using UnityEngine.Networking; |
| 7 | + |
| 8 | +namespace MLAPI.Relay |
| 9 | +{ |
| 10 | + public static class RelayTransport |
| 11 | + { |
| 12 | + private enum MessageType |
| 13 | + { |
| 14 | + StartServer, |
| 15 | + ConnectToServer, |
| 16 | + Data, |
| 17 | + ClientDisconnect |
| 18 | + } |
| 19 | + |
| 20 | + //State |
| 21 | + private static int relayConnectionId; |
| 22 | + private static bool isClient = false; |
| 23 | + private static string address; |
| 24 | + private static ushort port; |
| 25 | + private static List<ChannelQOS> channels = new List<ChannelQOS>(); |
| 26 | + |
| 27 | + public static bool Enabled { get; set; } |
| 28 | + public static string RelayAddress { get; set; } |
| 29 | + public static ushort RelayPort { get; set; } |
| 30 | + |
| 31 | + public static int Connect(int hostId, string serverAddress, int serverPort, int exceptionConnectionId, out byte error) |
| 32 | + { |
| 33 | + if (!Enabled) return NetworkTransport.Connect(hostId, serverAddress, serverPort, exceptionConnectionId, out error); |
| 34 | + |
| 35 | + isClient = true; |
| 36 | + RelayTransport.address = serverAddress; |
| 37 | + RelayTransport.port = (ushort)serverPort; |
| 38 | + relayConnectionId = NetworkTransport.Connect(hostId, RelayAddress, RelayPort, exceptionConnectionId, out error); // Requests connection |
| 39 | + return relayConnectionId; |
| 40 | + // Wait here until connect event is accepted |
| 41 | + } |
| 42 | + |
| 43 | + public static int ConnectWithSimulator(int hostId, string serverAddress, int serverPort, int exceptionConnectionId, out byte error, ConnectionSimulatorConfig conf) |
| 44 | + { |
| 45 | + if (!Enabled) return NetworkTransport.ConnectWithSimulator(hostId, serverAddress, serverPort, exceptionConnectionId, out error, conf); |
| 46 | + |
| 47 | + isClient = true; |
| 48 | + RelayTransport.address = serverAddress; |
| 49 | + RelayTransport.port = (ushort)serverPort; |
| 50 | + relayConnectionId = NetworkTransport.ConnectWithSimulator(hostId, RelayAddress, RelayPort, exceptionConnectionId, out error, conf); // Requests connection |
| 51 | + return relayConnectionId; |
| 52 | + } |
| 53 | + |
| 54 | + public static int ConnectEndPoint(int hostId, EndPoint endPoint, int exceptionConnectionId, out byte error) |
| 55 | + { |
| 56 | + if (!Enabled) return NetworkTransport.ConnectEndPoint(hostId, endPoint, exceptionConnectionId, out error); |
| 57 | + |
| 58 | + isClient = true; |
| 59 | + RelayTransport.address = ((IPEndPoint)endPoint).Address.ToString(); |
| 60 | + RelayTransport.port = (ushort)((IPEndPoint)endPoint).Port; |
| 61 | + relayConnectionId = NetworkTransport.Connect(hostId, RelayAddress, RelayPort, exceptionConnectionId, out error); // Requests connection |
| 62 | + return relayConnectionId; |
| 63 | + } |
| 64 | + |
| 65 | + private static void SetChannelsFromTopology(HostTopology topology) => channels = topology.DefaultConfig.Channels; |
| 66 | + |
| 67 | + public static int AddHost(HostTopology topology, bool createServer) |
| 68 | + { |
| 69 | + if (!Enabled) return NetworkTransport.AddHost(topology); |
| 70 | + |
| 71 | + isClient = !createServer; |
| 72 | + SetChannelsFromTopology(topology); |
| 73 | + int ret = NetworkTransport.AddHost(topology); |
| 74 | + if (createServer) relayConnectionId = NetworkTransport.Connect(ret, RelayAddress, RelayPort, 0, out byte b); |
| 75 | + return ret; |
| 76 | + } |
| 77 | + public static int AddHost(HostTopology topology, int port, bool createServer) |
| 78 | + { |
| 79 | + if (!Enabled) return NetworkTransport.AddHost(topology, port); |
| 80 | + |
| 81 | + isClient = !createServer; |
| 82 | + SetChannelsFromTopology(topology); |
| 83 | + int ret = NetworkTransport.AddHost(topology, port); |
| 84 | + if (createServer) relayConnectionId = NetworkTransport.Connect(ret, RelayAddress, RelayPort, 0, out byte b); |
| 85 | + return ret; |
| 86 | + } |
| 87 | + public static int AddHost(HostTopology topology, int port, string ip, bool createServer) |
| 88 | + { |
| 89 | + if (!Enabled) return NetworkTransport.AddHost(topology, port, ip); |
| 90 | + |
| 91 | + isClient = !createServer; |
| 92 | + SetChannelsFromTopology(topology); |
| 93 | + int ret = NetworkTransport.AddHost(topology, port, ip); |
| 94 | + if (createServer) relayConnectionId = NetworkTransport.Connect(ret, RelayAddress, RelayPort, 0, out byte b); |
| 95 | + return ret; |
| 96 | + } |
| 97 | + |
| 98 | + public static int AddHostWithSimulator(HostTopology topology, int minTimeout, int maxTimeout, int port, string ip, bool createServer) |
| 99 | + { |
| 100 | + if (!Enabled) return NetworkTransport.AddHostWithSimulator(topology, minTimeout, maxTimeout); |
| 101 | + |
| 102 | + isClient = !createServer; |
| 103 | + SetChannelsFromTopology(topology); |
| 104 | + int ret = NetworkTransport.AddHostWithSimulator(topology, minTimeout, maxTimeout, port, ip); |
| 105 | + if (createServer) relayConnectionId = NetworkTransport.Connect(ret, RelayAddress, RelayPort, 0, out byte b); |
| 106 | + return ret; |
| 107 | + } |
| 108 | + |
| 109 | + public static int AddHostWithSimulator(HostTopology topology, int minTimeout, int maxTimeout, bool createServer) |
| 110 | + { |
| 111 | + if (!Enabled) return NetworkTransport.AddHostWithSimulator(topology, minTimeout, maxTimeout); |
| 112 | + |
| 113 | + isClient = !createServer; |
| 114 | + SetChannelsFromTopology(topology); |
| 115 | + int ret = NetworkTransport.AddHostWithSimulator(topology, minTimeout, maxTimeout); |
| 116 | + if (createServer) relayConnectionId = NetworkTransport.Connect(ret, RelayAddress, RelayPort, 0, out byte b); |
| 117 | + return ret; |
| 118 | + } |
| 119 | + |
| 120 | + public static int AddHostWithSimulator(HostTopology topology, int minTimeout, int maxTimeout, int port, bool createServer) |
| 121 | + { |
| 122 | + if (!Enabled) return NetworkTransport.AddHostWithSimulator(topology, minTimeout, maxTimeout, port); |
| 123 | + |
| 124 | + isClient = !createServer; |
| 125 | + SetChannelsFromTopology(topology); |
| 126 | + int ret = NetworkTransport.AddHostWithSimulator(topology, minTimeout, maxTimeout, port); |
| 127 | + if (createServer) relayConnectionId = NetworkTransport.Connect(ret, RelayAddress, RelayPort, 0, out byte b); |
| 128 | + return ret; |
| 129 | + } |
| 130 | + |
| 131 | + public static int AddWebsocketHost(HostTopology topology, int port, bool createServer) |
| 132 | + { |
| 133 | + if (!Enabled) return NetworkTransport.AddWebsocketHost(topology, port); |
| 134 | + |
| 135 | + isClient = !createServer; |
| 136 | + SetChannelsFromTopology(topology); |
| 137 | + int ret = NetworkTransport.AddWebsocketHost(topology, port); |
| 138 | + if (createServer) relayConnectionId = NetworkTransport.Connect(ret, RelayAddress, RelayPort, 0, out byte b); |
| 139 | + return ret; |
| 140 | + } |
| 141 | + |
| 142 | + public static int AddWebsocketHost(HostTopology topology, int port, string ip, bool createServer) |
| 143 | + { |
| 144 | + if (!Enabled) return NetworkTransport.AddWebsocketHost(topology, port, ip); |
| 145 | + |
| 146 | + isClient = !createServer; |
| 147 | + SetChannelsFromTopology(topology); |
| 148 | + int ret = NetworkTransport.AddWebsocketHost(topology, port, ip); |
| 149 | + if (createServer) relayConnectionId = NetworkTransport.Connect(ret, RelayAddress, RelayPort, 0, out byte b); |
| 150 | + return ret; |
| 151 | + } |
| 152 | + |
| 153 | + private static byte[] disconnectBuffer = new byte[3] { (byte)MessageType.ClientDisconnect, 0, 0 }; |
| 154 | + public static bool Disconnect(int hostId, int connectionId, out byte error) |
| 155 | + { |
| 156 | + if (!Enabled) NetworkTransport.Disconnect(hostId, connectionId, out error); |
| 157 | + |
| 158 | + if (!isClient) |
| 159 | + { |
| 160 | + disconnectBuffer.ToBytes((ushort)connectionId, 1); |
| 161 | + return NetworkTransport.Send(hostId, relayConnectionId, GetReliableChannel(), disconnectBuffer, 3, out error); |
| 162 | + } |
| 163 | + else |
| 164 | + { |
| 165 | + return NetworkTransport.Disconnect(hostId, connectionId, out error); |
| 166 | + } |
| 167 | + } |
| 168 | + |
| 169 | + public static bool Send(int hostId, int connectionId, int channelId, byte[] buffer, int size, out byte error) |
| 170 | + { |
| 171 | + if (!Enabled) return NetworkTransport.Send(hostId, connectionId, channelId, buffer, size, out error); |
| 172 | + |
| 173 | + if (isClient) |
| 174 | + { |
| 175 | + ForwardOffset(buffer, 1, size); // Offsets just the bytes we're sending |
| 176 | + ++size; |
| 177 | + } |
| 178 | + else |
| 179 | + { |
| 180 | + ForwardOffset(buffer, 3, size); // Offsets just the bytes we're sending |
| 181 | + size += 3; |
| 182 | + |
| 183 | + buffer[1] = (byte)connectionId; |
| 184 | + buffer[2] = (byte)(connectionId >> 8); |
| 185 | + } |
| 186 | + buffer[0] = (byte)MessageType.Data; |
| 187 | + |
| 188 | + return NetworkTransport.Send(hostId, relayConnectionId, channelId, buffer, size, out error); |
| 189 | + } |
| 190 | + |
| 191 | + public static bool QueueMessageForSending(int hostId, int connectionId, int channelId, byte[] buffer, int size, out byte error) |
| 192 | + { |
| 193 | + if (!Enabled) return NetworkTransport.QueueMessageForSending(hostId, connectionId, channelId, buffer, size, out error); |
| 194 | + |
| 195 | + if (isClient) |
| 196 | + { |
| 197 | + ForwardOffset(buffer, 1, size); // Offsets just the bytes we're sending |
| 198 | + ++size; |
| 199 | + } |
| 200 | + else |
| 201 | + { |
| 202 | + ForwardOffset(buffer, 3, size); // Offsets just the bytes we're sending |
| 203 | + size += 3; |
| 204 | + |
| 205 | + buffer[1] = (byte)connectionId; |
| 206 | + buffer[2] = (byte)(connectionId >> 8); |
| 207 | + } |
| 208 | + buffer[0] = (byte)MessageType.Data; |
| 209 | + |
| 210 | + return NetworkTransport.QueueMessageForSending(hostId, relayConnectionId, channelId, buffer, size, out error); |
| 211 | + } |
| 212 | + |
| 213 | + public static bool SendQueuedMessages(int hostId, int connectionId, out byte error) |
| 214 | + { |
| 215 | + return NetworkTransport.SendQueuedMessages(hostId, relayConnectionId, out error); |
| 216 | + } |
| 217 | + |
| 218 | + public static NetworkEventType ReceiveFromHost(int hostId, out int connectionId, out int channelId, byte[] buffer, int bufferSize, out int receivedSize, out byte error) |
| 219 | + { |
| 220 | + if (!Enabled) return NetworkTransport.ReceiveFromHost(hostId, out connectionId, out channelId, buffer, bufferSize, out receivedSize, out error); |
| 221 | + |
| 222 | + NetworkEventType @event = NetworkTransport.ReceiveFromHost(hostId, out connectionId, out channelId, buffer, bufferSize, out receivedSize, out error); |
| 223 | + return BaseReceive(@event, hostId, ref connectionId, ref channelId, buffer, bufferSize, ref receivedSize, ref error); |
| 224 | + } |
| 225 | + |
| 226 | + public static NetworkEventType Receive(out int hostId, out int connectionId, out int channelId, byte[] buffer, int bufferSize, out int receivedSize, out byte error) |
| 227 | + { |
| 228 | + if (!Enabled) return NetworkTransport.Receive(out hostId, out connectionId, out channelId, buffer, bufferSize, out receivedSize, out error); |
| 229 | + |
| 230 | + NetworkEventType @event = NetworkTransport.Receive(out hostId, out connectionId, out channelId, buffer, bufferSize, out receivedSize, out error); |
| 231 | + return BaseReceive(@event, hostId, ref connectionId, ref channelId, buffer, bufferSize, ref receivedSize, ref error); |
| 232 | + } |
| 233 | + |
| 234 | + private static NetworkEventType BaseReceive(NetworkEventType @event, int hostId, ref int connectionId, ref int channelId, byte[] buffer, int bufferSize, ref int receivedSize, ref byte error) |
| 235 | + { |
| 236 | + switch (@event) |
| 237 | + { |
| 238 | + case NetworkEventType.DataEvent: |
| 239 | + MessageType messageType = (MessageType)buffer[0]; |
| 240 | + switch (messageType) |
| 241 | + { |
| 242 | + case MessageType.ConnectToServer: // Connection approved |
| 243 | + { |
| 244 | + if (!isClient) |
| 245 | + { |
| 246 | + connectionId = (ushort)(buffer[1] | (buffer[2] << 8)); // Parse connection id |
| 247 | + } |
| 248 | + return NetworkEventType.ConnectEvent; |
| 249 | + } |
| 250 | + case MessageType.Data: |
| 251 | + { |
| 252 | + if (isClient) |
| 253 | + { |
| 254 | + // Remove our headers |
| 255 | + ReverseOffset(buffer, 1, receivedSize); |
| 256 | + --receivedSize; |
| 257 | + } |
| 258 | + else |
| 259 | + { |
| 260 | + // Remove our headers |
| 261 | + connectionId = buffer.FromBytes(1); |
| 262 | + ReverseOffset(buffer, 3, receivedSize); |
| 263 | + receivedSize -= 3; |
| 264 | + } |
| 265 | + return NetworkEventType.DataEvent; |
| 266 | + } |
| 267 | + case MessageType.ClientDisconnect: |
| 268 | + { |
| 269 | + connectionId = (ushort)(buffer[1] | (buffer[2] << 8)); // Parse connection id |
| 270 | + return NetworkEventType.DisconnectEvent; |
| 271 | + } |
| 272 | + } |
| 273 | + break; |
| 274 | + case NetworkEventType.ConnectEvent: |
| 275 | + { |
| 276 | + if (isClient) |
| 277 | + { |
| 278 | + //Connect via relay |
| 279 | + string s = new StringBuilder(address).Append(':').Append(port).ToString(); |
| 280 | + buffer[0] = (byte)MessageType.ConnectToServer; |
| 281 | + buffer[1] = (byte)s.Length; |
| 282 | + for (int i = 0; i < s.Length; i++) |
| 283 | + { |
| 284 | + buffer[i + 2] = (byte)s[i]; // Get ASCII characters |
| 285 | + } |
| 286 | + |
| 287 | + NetworkTransport.Send(hostId, connectionId, GetReliableChannel(), buffer, s.Length + 2, out error); |
| 288 | + } |
| 289 | + else |
| 290 | + { |
| 291 | + //Register us as a server |
| 292 | + buffer[0] = (byte)MessageType.StartServer; |
| 293 | + NetworkTransport.Send(hostId, connectionId, GetReliableChannel(), buffer, 1, out error); |
| 294 | + } |
| 295 | + return NetworkEventType.Nothing; // Connect event is ignored |
| 296 | + } |
| 297 | + case NetworkEventType.DisconnectEvent: |
| 298 | + { |
| 299 | + if ((NetworkError)error == NetworkError.CRCMismatch) Debug.LogError("[MLAPI.Relay] The MLAPI Relay detected a CRC missmatch. This could be due to the maxClients or other connectionConfig settings not being the same"); |
| 300 | + return NetworkEventType.DisconnectEvent; |
| 301 | + } |
| 302 | + } |
| 303 | + return @event; |
| 304 | + } |
| 305 | + |
| 306 | + public static void ReverseOffset(byte[] b, int offset, int dLen) |
| 307 | + { |
| 308 | + for(int i = offset; i < dLen; ++i) |
| 309 | + b[i - offset] = b[i]; |
| 310 | + } |
| 311 | + |
| 312 | + public static void ForwardOffset(byte[] b, int offset, int dLen) |
| 313 | + { |
| 314 | + for(int i = dLen; i>=0; --i) |
| 315 | + b[i+offset] = b[i]; |
| 316 | + } |
| 317 | + |
| 318 | + //TODO: Fix |
| 319 | + public static byte GetReliableChannel() |
| 320 | + { |
| 321 | + for (byte i = 0; i < channels.Count; i++) |
| 322 | + { |
| 323 | + switch (channels[i].QOS) |
| 324 | + { |
| 325 | + case QosType.Reliable: |
| 326 | + case QosType.ReliableFragmented: |
| 327 | + case QosType.ReliableFragmentedSequenced: |
| 328 | + case QosType.ReliableSequenced: |
| 329 | + case QosType.ReliableStateUpdate: |
| 330 | + return i; |
| 331 | + } |
| 332 | + } |
| 333 | + throw new InvalidConfigException("A reliable channel is required"); |
| 334 | + } |
| 335 | + } |
| 336 | + |
| 337 | + public static class Helpers |
| 338 | + { |
| 339 | + public static void ToBytes(this byte[] b, ushort data, int offset = 0) |
| 340 | + { |
| 341 | + b[offset] = (byte)data; |
| 342 | + b[offset + 1] = (byte)(data >> 8); |
| 343 | + } |
| 344 | + public static ushort FromBytes(this byte[] b, int offset = 0) |
| 345 | + { |
| 346 | + return (ushort)(b[offset] | (b[offset + 1] << 8)); |
| 347 | + } |
| 348 | + } |
| 349 | + |
| 350 | + public class InvalidConfigException : SystemException |
| 351 | + { |
| 352 | + public InvalidConfigException() { } |
| 353 | + public InvalidConfigException(string issue) : base(issue) { } |
| 354 | + } |
| 355 | +} |
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