NewManager creates a new manager.

ErrInvalidFrame is returned when writing invalid frame type.

ErrInvalidPacket is returned when writing invalid packet type.

Manager is a manager of transports.

HTTPError is error which has http response code.

Opener is client connection which need receive open message first.

Pauser is connection which can be paused and resumes.

Transport is a transport which can creates base.Conn.

Checker is function to check request.