每一层都定义了抽象的接口，只要实现相应的接口，可以方便的对每一层进行扩展。每一个接口都提供了一个基类实现，可以继承该基类，然后重写想要修改的方法即可。

• Transport层
  负责网络相关的功能，目前支持TCP，WebSocket

      type ITransport interface {
          GetId() uint32
          GetLocalAddr() string
          GetRemoteAddr() string
          Listen() error
          Connect() error
          OnNewConnect(transport ITransport)
          Read()
          Write()
          Send(msgPkg IMessagePackage) error
          Close()
          OnClosed()
          IsStop() bool
          IsTimeout(tick *time.Timer) bool
      }

• Protocol层
  负责协议解析，目前支持ProtoBuff，Gob编码协议

      type IProtocol interface {
      	Marshal(msg interface{}) ([]byte, error)
      	Unmarshal(data []byte, v interface{}) error
      }

• MsgHandle层
  负责消息分发

      type IMsgHandle interface {
          RegisterMsg(tag uint32, msg interface{})
          NewMsg(tag uint32) interface{}
          GetMsgTag(msg interface{}) uint32
          SetProtocol(protocol IProtocol)
          GetProtocol() IProtocol
          CreateMessage(msgPkg IMessagePackage) interface{}
          CreateMessagePackage(msg interface{}) IMessagePackage
          Process(transport ITransport, msgPackage IMessagePackage)
          SetOnTransportClose(f func(transport ITransport))
          OnTransportClose(transport ITransport)
      }

构建一个服务只需组合上述三个层次的结构，即可定制需要的服务

//服务器逻辑
func serverStart() {
    //选择协议
    protocol := &lprotocol.PbProtocol{}
    //选择消息处理函数
    msgHandle := lmsghandle.NewBaseMsgHandle(protocol)
    //注册消息
    msgHandle.RegisterMsg(12, pb.GameItem{})
    msgHandle.RegisterMsg(13, pb.RpcReqData{})
    msgHandle.RegisterMsg(14, pb.RpcRspData{})
    //启动服务
    server := lserver.NewTcpServer("127.0.0.1:9000", msgHandle)
    server.Start()
}

//客户端逻辑
func clientStart() {
    //选择协议
    protocol := &lprotocol.PbProtocol{}
    //选择消息处理函数
    msgHandle := lmsghandle.NewBaseMsgHandle(protocol)
    //注册消息
    msgHandle.RegisterMsg(12, pb.GameItem{})
    msgHandle.RegisterMsg(13, pb.RpcReqData{})
    msgHandle.RegisterMsg(14, pb.RpcRspData{})

    client := lclient.NewTcpClient("127.0.0.1:9000", msgHandle)
    client.Connect()

    msg := &pb.GameItem{Id: 1, Type: 2, Count: 3}
    for {
        client.Send(msg)
        time.Sleep(1 * time.Second)
    }
}