/// <summary>
/// Called when this RpcSession is connected to the socket.
/// </summary>
protected override void OnConnected()
{
// If this is a new session on the server, send the welcome message.
if (BaseSocket.Mode == SocketMode.Server)
{
Server.ServerInfo.RequireAuthentication = Config.RequireAuthentication;
var serializer = SerializationCache.Get();
serializer.MessageWriter.Write((byte)MqCommandType.RpcCommand);
serializer.MessageWriter.Write((byte)RpcCommandType.WelcomeMessage);
serializer.SerializeToWriter(Server.ServerInfo);
var message = serializer.MessageWriter.ToMessage(true);
message[0].FrameType = MqFrameType.Command;
// RpcCommand:byte; RpcCommandType:byte; RpcServerInfoDataContract:byte[];
Send(message);
}
base.OnConnected();
// If the server does not require authentication, alert the server session that it is ready.
if (BaseSocket.Mode == SocketMode.Server && Config.RequireAuthentication == false)
{
Authenticated = true;
Ready?.Invoke(this, new SessionEventArgs <TSession, TConfig>((TSession)this));
}
}
/// <summary>
/// Processes an incoming command frame from the connection.
/// Captures the call if it is a Rpc command.
/// </summary>
/// <param name="frame">Command frame to process.</param>
protected override void ProcessCommand(MqFrame frame)
{
var commandType = (MqCommandType)frame.ReadByte(0);
// If this is a base MqCommand, pass this directly on to the base command handler.
if (commandType != MqCommandType.RpcCommand)
{
base.ProcessCommand(frame);
return;
}
try
{
var rpcCommandType = (RpcCommandType)frame.ReadByte(1);
if (rpcCommandType == RpcCommandType.WelcomeMessage)
{
// RpcCommand:byte; RpcCommandType:byte; RpcServerInfoDataContract:byte[];
// Ensure that this command is running on the client.
if (BaseSocket.Mode != SocketMode.Client)
{
Close(SocketCloseReason.ProtocolError);
return;
}
var serializer = SerializationCache.Get(new MqMessage(frame));
// Forward the reader two bytes to the data.
serializer.MessageReader.ReadBytes(2);
serializer.PrepareDeserializeReader();
// Try to read the information from the server about the server.
Client.ServerInfo =
serializer.DeserializeFromReader(typeof(RpcServerInfoDataContract)) as RpcServerInfoDataContract;
if (Client.ServerInfo == null)
{
Close(SocketCloseReason.ProtocolError);
return;
}
// Check to see if the server requires authentication. If so, send a auth check.
if (Client.ServerInfo.RequireAuthentication)
{
var authArgs = new RpcAuthenticateEventArgs <TSession, TConfig>((TSession)this);
// Start the authentication event to get the auth data.
Authenticate?.Invoke(this, authArgs);
serializer.MessageWriter.Write((byte)MqCommandType.RpcCommand);
serializer.MessageWriter.Write((byte)RpcCommandType.AuthenticationRequest);
if (authArgs.AuthData == null)
{
authArgs.AuthData = new byte[] { 0 };
}
serializer.MessageWriter.Write(authArgs.AuthData, 0, authArgs.AuthData.Length);
var authMessage = serializer.MessageWriter.ToMessage(true);
authMessage[0].FrameType = MqFrameType.Command;
_authTimeout = new Task(async() =>
{
try
{
await Task.Delay(Config.ConnectionTimeout, _authTimeoutCancel.Token);
}
catch
{
return;
}
if (!_authTimeoutCancel.IsCancellationRequested)
{
Close(SocketCloseReason.TimeOut);
}
});
// RpcCommand:byte; RpcCommandType:byte; AuthData:byte[];
Send(authMessage);
_authTimeout.Start();
}
else
{
// If no authentication is required, set this client to authenticated.
Authenticated = true;
// Alert the server that this session is ready for usage.
Task.Run(
() => { Ready?.Invoke(this, new SessionEventArgs <TSession, TConfig>((TSession)this)); });
}
SerializationCache.Put(serializer);
}
else if (rpcCommandType == RpcCommandType.AuthenticationRequest)
{
// RpcCommand:byte; RpcCommandType:byte; AuthData:byte[];
// If this is not run on the server, quit.
if (BaseSocket.Mode != SocketMode.Server)
{
Close(SocketCloseReason.ProtocolError);
return;
}
// Ensure that the server requires authentication.
if (Server.Config.RequireAuthentication == false)
{
Close(SocketCloseReason.ProtocolError);
return;
}
byte[] authBytes = new byte[frame.DataLength - 2];
frame.Read(2, authBytes, 0, authBytes.Length);
var authArgs = new RpcAuthenticateEventArgs <TSession, TConfig>((TSession)this)
{
AuthData = authBytes
};
Authenticate?.Invoke(this, authArgs);
Authenticated = authArgs.Authenticated;
if (Authenticated == false)
{
Close(SocketCloseReason.AuthenticationFailure);
}
else
{
var authFrame = CreateFrame(new byte[authArgs.AuthData.Length + 2], MqFrameType.Command);
authFrame.Write(0, (byte)MqCommandType.RpcCommand);
authFrame.Write(1, (byte)RpcCommandType.AuthenticationResult);
// State of the authentication
authFrame.Write(2, Authenticated);
// RpcCommand:byte; RpcCommandType:byte; AuthResult:bool;
Send(authFrame);
// Alert the server that this session is ready for usage.
Task.Run(
() => { Ready?.Invoke(this, new SessionEventArgs <TSession, TConfig>((TSession)this)); });
}
}
else if (rpcCommandType == RpcCommandType.AuthenticationResult)
{
// RpcCommand:byte; RpcCommandType:byte; AuthResult:bool;
// Cancel the timeout request.
_authTimeoutCancel.Cancel();
// Ensure that this command is running on the client.
if (BaseSocket.Mode != SocketMode.Client)
{
Close(SocketCloseReason.ProtocolError);
return;
}
if (Client.Config.RequireAuthentication == false)
{
Close(SocketCloseReason.ProtocolError);
return;
}
Authenticated = true;
var authArgs = new RpcAuthenticateEventArgs <TSession, TConfig>((TSession)this)
{
Authenticated = frame.ReadBoolean(2)
};
// Alert the client that the sesion has been authenticated.
AuthenticationSuccess?.Invoke(this, authArgs);
// Alert the client that this session is ready for usage.
Task.Run(() => { Ready?.Invoke(this, new SessionEventArgs <TSession, TConfig>((TSession)this)); });
}
else
{
Close(SocketCloseReason.ProtocolError);
}
}
catch (Exception)
{
Close(SocketCloseReason.ProtocolError);
}
}