ECHO_REGISTER_PROTO (TRANSPORT_PROTO_TCP, echo_tcp_proto_cb_vft);
ECHO_REGISTER_PROTO (TRANSPORT_PROTO_TLS, echo_tls_proto_cb_vft);
ECHO_REGISTER_PROTO (TRANSPORT_PROTO_TCP, echo_tcp_proto_cb_vft);
ECHO_REGISTER_PROTO (TRANSPORT_PROTO_TLS, echo_tls_proto_cb_vft);