internal static Packet Instantiate(byte[] source, PacketDefinitionRegistry packetRegistry = null)
{
packetRegistry = packetRegistry ?? PacketDefinitionRegistryFactory.CreateClassicClient();
var processingStream = new MemoryStream(source);
var received = new byte[source.Length];
var packetReader = new StreamPacketReader(processingStream, received);
int packetId = packetReader.ReadByte();
if ((packetId < 0) || (packetId > 255))
{
throw new EndOfStreamException();
}
var packetDefinition = packetRegistry.Find(packetId);
var packetSize = packetDefinition.GetSize(packetReader);
packetReader.ReadBytes(packetSize - packetReader.Position);
var payload = new byte[packetSize];
Array.Copy(received, 0, payload, 0, packetSize);
var packet = new Packet(packetId, payload);
return(packet);
}
public Packet Receive(Stream processingStream)
{
var packetReader = new StreamPacketReader(processingStream, receiveBuffer);
int packetId = packetReader.ReadByte();
if ((packetId < 0) || (packetId > 255))
{
throw new EndOfStreamException();
}
diagnosticPullStream.StartPacket();
var packetDefinition = packetRegistry.Find(packetId);
var packetSize = packetDefinition.GetSize(packetReader);
packetReader.ReadBytes(packetSize - packetReader.Position);
var payload = new byte[packetSize];
Array.Copy(receiveBuffer, 0, payload, 0, packetSize);
var packet = new Packet(packetId, payload);
if (packetId == PacketDefinitions.ConnectToGameServer.Id)
{
Status = ServerConnectionStatus.PreGame;
}
diagnosticPullStream.FinishPacket(packet);
return(packet);
}
private static int GetPacketLength(StreamPacketReader reader, int packetId)
{
PacketDefinition packetDefinition;
if (PacketDefinitionRegistry.TryFind(packetId, out packetDefinition))
{
return(packetDefinition.GetSize(reader));
}
throw new NotImplementedException($"Unknown packet type {packetId:X2}");
}
public static Packet ParsePacket(IPullStream inputStream)
{
byte[] buffer = new byte[65535];
var reader = new StreamPacketReader(new PullStreamToStreamAdapter(inputStream), buffer);
int packetId = reader.ReadByte();
int packetLength = GetPacketLength(reader, packetId);
reader.ReadBytes(packetLength - reader.Position);
var payload = new byte[packetLength];
Array.Copy(buffer, 0, payload, 0, packetLength);
return(new Packet(packetId, payload));
}
public LoginEncryptionDetectionResult Detect(uint seed, IPullStream inputStream, Version defaultVersion)
{
var reader = new StreamPacketReader(new PullStreamToStreamAdapter(inputStream), rawBuffer);
var length = 0;
while (inputStream.DataAvailable && length < 62)
{
rawBuffer[length++] = reader.ReadByte();
}
rawBuffer.CopyTo(decryptedBuffer, 0);
var versionsToTest = GetVersionsToTest(defaultVersion).GetEnumerator();
LoginEncryptionKey?currentKey = null;
LoginCrypt loginCrypt = null;
while (!IsGameServerPacket(decryptedBuffer))
{
if (!versionsToTest.MoveNext())
{
break;
}
var version = versionsToTest.Current;
currentKey = LoginEncryptionKey.FromVersion(version);
loginCrypt = new LoginCrypt(seed, currentKey.Value);
loginCrypt.Decrypt(rawBuffer, decryptedBuffer, 62);
}
if (currentKey.HasValue)
{
return(new LoginEncryptionDetectionResult(decryptedBuffer, loginCrypt, currentKey.Value));
}
else
{
return(new LoginEncryptionDetectionResult(decryptedBuffer));
}
}
public Packet ParsePacket(IPullStream inputStream)
{
byte[] buffer = new byte[65535];
var reader = new StreamPacketReader(new PullStreamToStreamAdapter(inputStream), buffer);
int packetId = reader.ReadByte();
try
{
int packetLength = GetPacketLength(reader, packetId);
reader.ReadBytes(packetLength - reader.Position);
var payload = new byte[packetLength];
Array.Copy(buffer, 0, payload, 0, packetLength);
return(new Packet(packetId, payload));
}
catch (Exception ex)
{
throw new EndOfStreamException($"EndOfStreamException occured when reading packet {packetId:X2}", ex);
}
}