package internet import ( "context" "github.com/xtls/xray-core/common/net" ) var ( transportListenerCache = make(map[string]ListenFunc) ) func RegisterTransportListener(protocol string, listener ListenFunc) error { if _, found := transportListenerCache[protocol]; found { return newError(protocol, " listener already registered.").AtError() } transportListenerCache[protocol] = listener return nil } type ConnHandler func(Connection) type ListenFunc func(ctx context.Context, address net.Address, port net.Port, settings *MemoryStreamConfig, handler ConnHandler) (Listener, error) type Listener interface { Close() error Addr() net.Addr } // ListenUnix is the UDS version of ListenTCP func ListenUnix(ctx context.Context, address net.Address, settings *MemoryStreamConfig, handler ConnHandler) (Listener, error) { if settings == nil { s, err := ToMemoryStreamConfig(nil) if err != nil { return nil, newError("failed to create default unix stream settings").Base(err) } settings = s } protocol := settings.ProtocolName listenFunc := transportListenerCache[protocol] if listenFunc == nil { return nil, newError(protocol, " unix istener not registered.").AtError() } listener, err := listenFunc(ctx, address, net.Port(0), settings, handler) if err != nil { return nil, newError("failed to listen on unix address: ", address).Base(err) } return listener, nil } func ListenTCP(ctx context.Context, address net.Address, port net.Port, settings *MemoryStreamConfig, handler ConnHandler) (Listener, error) { if settings == nil { s, err := ToMemoryStreamConfig(nil) if err != nil { return nil, newError("failed to create default stream settings").Base(err) } settings = s } if address.Family().IsDomain() && address.Domain() == "localhost" { address = net.LocalHostIP } if address.Family().IsDomain() { return nil, newError("domain address is not allowed for listening: ", address.Domain()) } protocol := settings.ProtocolName listenFunc := transportListenerCache[protocol] if listenFunc == nil { return nil, newError(protocol, " listener not registered.").AtError() } listener, err := listenFunc(ctx, address, port, settings, handler) if err != nil { return nil, newError("failed to listen on address: ", address, ":", port).Base(err) } return listener, nil } // ListenSystem listens on a local address for incoming TCP connections. // // xray:api:beta func ListenSystem(ctx context.Context, addr net.Addr, sockopt *SocketConfig) (net.Listener, error) { return effectiveListener.Listen(ctx, addr, sockopt) } // ListenSystemPacket listens on a local address for incoming UDP connections. // // xray:api:beta func ListenSystemPacket(ctx context.Context, addr net.Addr, sockopt *SocketConfig) (net.PacketConn, error) { return effectiveListener.ListenPacket(ctx, addr, sockopt) }