private void NetworkAcceptDataAsync(IAsyncResult result)
{
try {
var container = (PacketDataContainer)result.AsyncState;
var len = _socket.EndReceiveFrom(result, ref container.Remote);
if (!_remotePackets.ContainsKey(container.Remote))
{
if (len != _handshakeIn.Length || !container.ValidateBlock(_handshakeIn))
{
return;
}
Logger.Info($"Received handshake packet from [/{container.Remote}], len: {len}");
try {
Logger.Info($"Response auth success to [/{container.Remote}]");
var instanceRemoteState = new RemotePacketState();
_remotePackets.Add(container.Remote, instanceRemoteState);
_handshakeOut[_handshakeOut.Length - 1] = instanceRemoteState.MagicByte;
_socket.SendTo(_handshakeOut, container.Remote);
} catch {
;
}
}
var remoteState = _remotePackets[container.Remote];
// If user trying to send auth handshake again, response that all ok
if (container.ValidateBlock(_handshakeIn))
{
_handshakeOut[_handshakeOut.Length - 1] = remoteState.MagicByte;
_socket.SendTo(_handshakeOut, container.Remote);
return;
}
var magicByteRemote = container.Buffer[0];
if (magicByteRemote != remoteState.MagicByte)
{
Logger.Warn($"Invalid remote magic byte '{magicByteRemote}' instead of '{remoteState.MagicByte}' from [/{container.Remote as IPEndPoint}]");
return;
}
NetworkRemoteControl.AcceptPacket(remoteState, container);
} catch (ObjectDisposedException) {
;
} catch (Exception e) {
Logger.Error("Accept data packet error", e);
} finally {
NetworkStartAcceptingData();
}
}
public void SendPacket(NetPacket packet, PacketDataContainer dataContainer, RemotePacketState remoteState)
{
if (packet == null)
{
Logger.Warn("Trying to send empty packet!");
return;
}
var packetId = NetworkRemoteControl.FindPacketIdByType(packet.GetType());
if (packetId == null)
{
Logger.Debug($"Trying to send unknown packet {packet.GetType().FullName}");
return;
}
using (var ms = new MemoryStream()) {
using (var bw = new BinaryWriter(ms)) {
bw.Write((uint)packetId);
packet.Write(new StreamWriter(ms), remoteState);
_socket.SendTo(ms.GetBuffer(), dataContainer.Remote);
}
}
}
