tunnel

type HandshakeHelper struct {
	// The function used to process handshake, the handshake processes
	// are different between server endpoint and client endpoint.
	Handshakefunc handshakefunc `json:"-"`
	TokenSource   *token.TokenSourcePlugin
	TokenParser   *token.TokenParserPlugin
	// The data will send to remote endpoint. In client
	// endpoit, this means 'token'; In server endpoint,
	// this means ack message.
	SendData []byte
	// Used to store the data receive from remote endpoint. In
	// server endpoint, this store the 'token'; In client endpoint,
	// this store the ack message.
	ReceiveData string
}