Golang Destination.Port方法代碼示例

func Dial(dest v2net.Destination) (net.Conn, error) {
	var ip net.IP
	if dest.Address().IsIPv4() || dest.Address().IsIPv6() {
		ip = dest.Address().IP()
	} else {
		ips, err := net.LookupIP(dest.Address().Domain())
		if err != nil {
			return nil, err
		}
		if len(ips) == 0 {
			return nil, ErrInvalidHost
		}
		ip = ips[dice.Roll(len(ips))]
	}
	if dest.IsTCP() {
		return net.DialTCP("tcp", nil, &net.TCPAddr{
			IP:   ip,
			Port: int(dest.Port()),
		})
	} else {
		return net.DialUDP("udp", nil, &net.UDPAddr{
			IP:   ip,
			Port: int(dest.Port()),
		})
	}
}

func Dial(dest v2net.Destination) (net.Conn, error) {
	if dest.Address().IsDomain() {
		dialer := &net.Dialer{
			Timeout:   time.Second * 60,
			DualStack: true,
		}
		network := "tcp"
		if dest.IsUDP() {
			network = "udp"
		}
		return dialer.Dial(network, dest.NetAddr())
	}

	ip := dest.Address().IP()
	if dest.IsTCP() {
		return net.DialTCP("tcp", nil, &net.TCPAddr{
			IP:   ip,
			Port: int(dest.Port()),
		})
	} else {
		return net.DialUDP("udp", nil, &net.UDPAddr{
			IP:   ip,
			Port: int(dest.Port()),
		})
	}
}

func (this *VMessOutboundHandler) Dispatch(target v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
	defer ray.OutboundInput().Release()
	defer ray.OutboundOutput().Close()

	var rec *protocol.ServerSpec
	var conn internet.Connection

	err := retry.Timed(5, 100).On(func() error {
		rec = this.serverPicker.PickServer()
		rawConn, err := internet.Dial(this.meta.Address, rec.Destination(), this.meta.StreamSettings)
		if err != nil {
			return err
		}
		conn = rawConn

		return nil
	})
	if err != nil {
		log.Error("VMess|Outbound: Failed to find an available destination:", err)
		return err
	}
	log.Info("VMess|Outbound: Tunneling request to ", target, " via ", rec.Destination)

	command := protocol.RequestCommandTCP
	if target.IsUDP() {
		command = protocol.RequestCommandUDP
	}
	request := &protocol.RequestHeader{
		Version: encoding.Version,
		User:    rec.PickUser(),
		Command: command,
		Address: target.Address(),
		Port:    target.Port(),
		Option:  protocol.RequestOptionChunkStream,
	}

	defer conn.Close()

	conn.SetReusable(true)
	if conn.Reusable() { // Conn reuse may be disabled on transportation layer
		request.Option.Set(protocol.RequestOptionConnectionReuse)
	}

	input := ray.OutboundInput()
	output := ray.OutboundOutput()

	var requestFinish, responseFinish sync.Mutex
	requestFinish.Lock()
	responseFinish.Lock()

	session := encoding.NewClientSession(protocol.DefaultIDHash)

	go this.handleRequest(session, conn, request, payload, input, &requestFinish)
	go this.handleResponse(session, conn, request, rec.Destination(), output, &responseFinish)

	requestFinish.Lock()
	responseFinish.Lock()
	return nil
}

func socks5UDPRequest(address v2net.Destination, payload []byte) []byte {
	request := make([]byte, 0, 1024)
	request = append(request, 0, 0, 0)
	request = appendAddress(request, address.Address())
	request = address.Port().Bytes(request)
	request = append(request, payload...)
	return request
}

func (this *FieldRule) Apply(dest v2net.Destination) bool {
	address := dest.Address()
	if len(this.Domain) > 0 {
		if !address.IsDomain() {
			return false
		}
		foundMatch := false
		for _, domain := range this.Domain {
			if domain.Match(address.Domain()) {
				foundMatch = true
				break
			}
		}
		if !foundMatch {
			return false
		}
	}

	if this.IP != nil && len(this.IP) > 0 {
		if !(address.IsIPv4() || address.IsIPv6()) {
			return false
		}
		foundMatch := false
		for _, ipnet := range this.IP {
			if ipnet.Contains(address.IP()) {
				foundMatch = true
				break
			}
		}
		if !foundMatch {
			return false
		}
	}

	if this.Port != nil {
		port := dest.Port()
		if port.Value() < this.Port.From().Value() || port.Value() > this.Port.To().Value() {
			return false
		}
	}

	if this.Network != nil {
		if !this.Network.HasNetwork(v2net.Network(dest.Network())) {
			return false
		}
	}

	return true
}

func DialKCP(src v2net.Address, dest v2net.Destination) (internet.Connection, error) {
	udpDest := v2net.UDPDestination(dest.Address(), dest.Port())
	log.Info("Dialling KCP to ", udpDest)
	conn, err := internet.DialToDest(src, udpDest)
	if err != nil {
		return nil, err
	}

	cpip := NewSimpleAuthenticator()
	conv := uint16(atomic.AddUint32(&globalConv, 1))
	session := NewConnection(conv, conn, conn.LocalAddr().(*net.UDPAddr), conn.RemoteAddr().(*net.UDPAddr), cpip)
	session.FetchInputFrom(conn)

	return session, nil
}

// @Private
func (this *Router) ResolveIP(dest v2net.Destination) []v2net.Destination {
	ips := this.dnsServer.Get(dest.Address().Domain())
	if len(ips) == 0 {
		return nil
	}
	dests := make([]v2net.Destination, len(ips))
	for idx, ip := range ips {
		if dest.IsTCP() {
			dests[idx] = v2net.TCPDestination(v2net.IPAddress(ip), dest.Port())
		} else {
			dests[idx] = v2net.UDPDestination(v2net.IPAddress(ip), dest.Port())
		}
	}
	return dests
}

func (this *Listener) OnReceive(payload *alloc.Buffer, src v2net.Destination) {
	defer payload.Release()

	if valid := this.block.Open(payload); !valid {
		log.Info("KCP|Listener: discarding invalid payload from ", src)
		return
	}
	if !this.running {
		return
	}
	this.Lock()
	defer this.Unlock()
	if !this.running {
		return
	}
	if payload.Len() < 4 {
		return
	}
	conv := serial.BytesToUint16(payload.Value)
	cmd := Command(payload.Value[2])
	sourceId := src.NetAddr() + "|" + serial.Uint16ToString(conv)
	conn, found := this.sessions[sourceId]
	if !found {
		if cmd == CommandTerminate {
			return
		}
		log.Debug("KCP|Listener: Creating session with id(", sourceId, ") from ", src)
		writer := &Writer{
			id:       sourceId,
			hub:      this.hub,
			dest:     src,
			listener: this,
		}
		srcAddr := &net.UDPAddr{
			IP:   src.Address().IP(),
			Port: int(src.Port()),
		}
		conn = NewConnection(conv, writer, this.localAddr, srcAddr, this.block)
		select {
		case this.awaitingConns <- conn:
		case <-time.After(time.Second * 5):
			conn.Close()
			return
		}
		this.sessions[sourceId] = conn
	}
	conn.Input(payload.Value)
}

func (this *VMessOutboundHandler) startCommunicate(request *proto.RequestHeader, dest v2net.Destination, ray ray.OutboundRay, firstPacket v2net.Packet) error {
	var destIP net.IP
	if dest.Address().IsIPv4() || dest.Address().IsIPv6() {
		destIP = dest.Address().IP()
	} else {
		ips, err := net.LookupIP(dest.Address().Domain())
		if err != nil {
			return err
		}
		destIP = ips[0]
	}
	conn, err := net.DialTCP("tcp", nil, &net.TCPAddr{
		IP:   destIP,
		Port: int(dest.Port()),
	})
	if err != nil {
		log.Error("Failed to open ", dest, ": ", err)
		if ray != nil {
			close(ray.OutboundOutput())
		}
		return err
	}
	log.Info("VMessOut: Tunneling request to ", request.Address, " via ", dest)

	defer conn.Close()

	input := ray.OutboundInput()
	output := ray.OutboundOutput()

	var requestFinish, responseFinish sync.Mutex
	requestFinish.Lock()
	responseFinish.Lock()

	session := raw.NewClientSession(proto.DefaultIDHash)

	go this.handleRequest(session, conn, request, firstPacket, input, &requestFinish)
	go this.handleResponse(session, conn, request, dest, output, &responseFinish)

	requestFinish.Lock()
	conn.CloseWrite()
	responseFinish.Lock()
	return nil
}

func startCommunicate(request *protocol.VMessRequest, dest v2net.Destination, ray ray.OutboundRay, firstPacket v2net.Packet) error {
	var destIp net.IP
	if dest.Address().IsIPv4() || dest.Address().IsIPv6() {
		destIp = dest.Address().IP()
	} else {
		ips, err := net.LookupIP(dest.Address().Domain())
		if err != nil {
			return err
		}
		destIp = ips[0]
	}
	conn, err := net.DialTCP("tcp", nil, &net.TCPAddr{
		IP:   destIp,
		Port: int(dest.Port()),
	})
	if err != nil {
		log.Error("Failed to open ", dest, ": ", err)
		if ray != nil {
			close(ray.OutboundOutput())
		}
		return err
	}
	log.Info("VMessOut: Tunneling request to ", request.Address, " via ", dest)

	defer conn.Close()

	input := ray.OutboundInput()
	output := ray.OutboundOutput()

	var requestFinish, responseFinish sync.Mutex
	requestFinish.Lock()
	responseFinish.Lock()

	go handleRequest(conn, request, firstPacket, input, &requestFinish)
	go handleResponse(conn, request, output, &responseFinish, (request.Command == protocol.CmdUDP))

	requestFinish.Lock()
	conn.CloseWrite()
	responseFinish.Lock()
	return nil
}

// @Private
func (this *FreedomConnection) ResolveIP(destination v2net.Destination) v2net.Destination {
	if !destination.Address().IsDomain() {
		return destination
	}

	ips := this.dns.Get(destination.Address().Domain())
	if len(ips) == 0 {
		log.Info("Freedom: DNS returns nil answer. Keep domain as is.")
		return destination
	}

	ip := ips[dice.Roll(len(ips))]
	var newDest v2net.Destination
	if destination.IsTCP() {
		newDest = v2net.TCPDestination(v2net.IPAddress(ip), destination.Port())
	} else {
		newDest = v2net.UDPDestination(v2net.IPAddress(ip), destination.Port())
	}
	log.Info("Freedom: Changing destination from ", destination, " to ", newDest)
	return newDest
}

func socks5Request(command byte, address v2net.Destination) []byte {
	request := []byte{socks5Version, command, 0}
	request = appendAddress(request, address.Address())
	request = address.Port().Bytes(request)
	return request
}

func (this *UDPHub) WriteTo(payload []byte, dest v2net.Destination) (int, error) {
	return this.conn.WriteToUDP(payload, &net.UDPAddr{
		IP:   dest.Address().IP(),
		Port: int(dest.Port()),
	})
}

func (this *PortMatcher) Apply(dest v2net.Destination) bool {
	return this.port.Contains(dest.Port())
}