public void Receive(Socket socket, ReceivedPacket packet)
{
try
{
if (HasTimedOut)
{
return;
}
_lastReceivedTime = DateTime.Now;
// If we have already acked, then reack
if (packet.CommandCode.HasFlag(ReceivedPacket.CommandCodeFlags.AckRequest) && IsPacketCoveredByAck(_readyToAck.GetValueOrDefault(0), packet.PacketId))
{
QueueOrSendAck(socket, packet.PacketId);
return;
}
// If we have skipped something, then discard
if (packet.CommandCode.HasFlag(ReceivedPacket.CommandCodeFlags.AckRequest) && packet.PacketId != IncrementPacketId(_readyToAck.GetValueOrDefault(0)))
{
Log.DebugFormat("{0} - Discarding message received out of order Got:{1} Expected:{2}", Endpoint, packet.PacketId, _readyToAck);
return;
}
// Handle it
if (packet.CommandCode.HasFlag(ReceivedPacket.CommandCodeFlags.AckRequest))
{
QueueOrSendAck(socket, packet.PacketId);
}
Log.DebugFormat("{0} - Command {1}, Length {2}, Session {3:X}, Acked {4}, Packet {5}", Endpoint,
packet.CommandCode, packet.PayloadLength, packet.SessionId, packet.AckedId, packet.PacketId);
if (packet.CommandCode.HasFlag(ReceivedPacket.CommandCodeFlags.AckReply))
{
_isOpen = true;
if (!_lastReceivedAck.HasValue || !IsPacketCoveredByAck(_lastReceivedAck.Value, packet.AckedId))
{
_lastReceivedAck = packet.AckedId;
}
}
if (packet.CommandCode.HasFlag(ReceivedPacket.CommandCodeFlags.AckRequest))
{
Log.DebugFormat("{0} - Parsed {1} commands with length {2}", Endpoint, packet.Commands.Count, packet.PayloadLength);
_processQueue.Add(packet);
OnReceivePacket?.Invoke(this, packet);
}
// Note: Handshake is handled elsewhere
// Note: Unknown, Retransmit both need no action
}
catch (ArgumentException)
{
//discard as was malformed
}
}
private void ForwardAllIncomingPackets()
{
Queue <BasePacket> packets;
lock (packetLock)
{
packets = incomingPackets;
incomingPackets = new Queue <BasePacket>();
}
foreach (var packet in packets)
{
OnReceivePacket?.Invoke(packet);
}
}
/// <summary>
/// Handles a received packet. Welcome packets are handled internally.
/// </summary>
void HandlePacket(PacketId packetId, Packet packet)
{
if (packetId == PacketId.WelcomeResponse)
{
WelcomeResponse(packet);
}
else
{
//dispatch local client event.
OnReceivePacket.Invoke(packet);
//dispatch global server event.
OnClientReceivePacket(this, packet);
}
}
/// <summary>
/// Receives a package and handles the welcome package. Welcome packets are handled internally.
/// </summary>
static void OnHandleData(byte[] data)
{
var packet = new Packet(data);
var packetId = (PacketId)packet.ReadInt();
packet.SetId(packetId);
if (packetId == PacketId.Welcome)
{
OnWelcome(packet);
}
else
{
OnReceivePacket.Invoke(packet);
}
}
private async void ReadCallback(IAsyncResult ar)
{
if (_cancellationToken.IsCancellationRequested)
{
return;
}
int length;
try
{
length = _socket.EndReceive(ar);
}
catch
{
await Disconnect();
return;
}
if (length == 0)
{
await Disconnect();
return;
}
var data = new byte[length + _extra.Length];
Array.Copy(_extra, 0, data, 0, _extra.Length);
Array.Copy(_buffer, 0, data, _extra.Length, length);
try
{
Packet packet;
using (var ms = new MemoryStream(data))
{
packet = ProtoBuf.Serializer.Deserialize <Packet>(ms);
_extra = new byte[ms.Length - ms.Position];
ms.Read(_extra, 0, _extra.Length);
}
switch (packet)
{
case Ping p:
await Send(Pong.Default);
break;
case Pong p:
break;
default:
_logger?.LogDebug($"[Socket] {_socket.Handle} - Receive data: {Convert.ToBase64String(data)}");
OnReceivePacket?.Invoke(this, packet);
break;
}
}
catch (EndOfStreamException)
{
_extra = data;
}
catch (Exception)
{
await Disconnect();
}
_waiterData.Release();
}