iface

type Backend interface {
	ID() string
	// AddClient associates a client connection and informs the backend about it.
	// The hostname indicates which virtual host this client targets.
	AddClient(clientConn net.Conn, clientID uuid.UUID, hostname string, isTLS bool) error
	RemoveClient(clientID uuid.UUID)
	SendData(clientID uuid.UUID, data []byte) error
	// HasRecentActivity reports whether data has been written to the given
	// client since the specified time. Used by the idle timeout logic to
	// avoid killing connections during active downloads.
	HasRecentActivity(clientID uuid.UUID, since time.Time) bool
}

type Hub interface {
	GetLocalRoutes() []string
	SelectBackend(hostname string) (Backend, error)
	UDPFlowIdleTimeout(port int) (time.Duration, bool)
	GetBandwidthScheduler() *bandwidth.Scheduler
}

type Peer interface {
	Addr() string
	Send(message []byte) bool
	StartTunnel(conn net.Conn, hostname string, isTLS bool)
}

type PeerManager interface {
	HandleInboundPeer(conn *websocket.Conn)
	AnnounceLocalRoutes()
	GetPeerForHostname(hostname string) (Peer, bool)
	HandleTunnelRequest(p Peer, hostname string, clientID uuid.UUID, clientIP string, connPort int, isTLS bool)
	ForwardUDP(routeKey string, dstPort int, pc net.PacketConn, clientAddr *net.UDPAddr, payload []byte) error
}