transport

type BusyChannelChecker interface {
	// Returns true if the channel is not clear
	Busy() bool
}

type ContextDialer interface {
	// DiaulURLContext dials a connection.
	//
	// If the given context is cancelled before the connection is made, the operation is aborted and an error returned.
	// Once successfully connected, any expiration of the context will not affect the connection.
	DialURLContext(ctx context.Context, url *URL) (net.Conn, error)
}

type Dialer interface {
	DialURL(url *URL) (net.Conn, error)
}

type Flusher interface {
	// Flush flushes the transmit buffers of the underlying modem.
	Flush() error
}

type PTTController interface {
	SetPTT(on bool) error
}

type Robust interface {
	// Enables/disables robust mode.
	SetRobust(r bool) error
}

type TxBuffer interface {
	// TransmitBufferLen returns the number of bytes in the out buffer queue.
	TxBufferLen() int
}

type URL struct {
	// TNC/modem/interface/network type.
	Scheme string

	// The host interface address.
	Host string

	// Host username (typically the local stations callsign) and password information.
	User *url.Userinfo

	// Target callsign.
	Target string

	// List of digipeaters ("path" between origin and target).
	Digis []string

	// List of query parameters.
	Params url.Values
}