//[Event]
 public abstract bool TcpSessionStateChangeEvent(
     ushort sessionId,
     TcpSessionState fromState,
     TcpSessionState toState);
 //[Event]
 public abstract bool TcpSessionReceivedPacketEvent(
     ushort sessionId,
     TcpSessionState currentState,
     TcpPacketFlags packetFlags,
     uint packetLength);