type fileAddr … func (fileAddr) Network() string { … } func (f fileAddr) String() string { … } // FileConn returns a copy of the network connection corresponding to // the open file f. // It is the caller's responsibility to close f when finished. // Closing c does not affect f, and closing f does not affect c. func FileConn(f *os.File) (c Conn, err error) { … } // FileListener returns a copy of the network listener corresponding // to the open file f. // It is the caller's responsibility to close ln when finished. // Closing ln does not affect f, and closing f does not affect ln. func FileListener(f *os.File) (ln Listener, err error) { … } // FilePacketConn returns a copy of the packet network connection // corresponding to the open file f. // It is the caller's responsibility to close f when finished. // Closing c does not affect f, and closing f does not affect c. func FilePacketConn(f *os.File) (c PacketConn, err error) { … }