示例#1
2
// RequestPort requests new port from global ports pool for specified ip and proto.
// If port is 0 it returns first free port. Otherwise it cheks port availability
// in pool and return that port or error if port is already busy.
func RequestPort(ip net.IP, proto string, port int) (int, error) {
	mutex.Lock()
	defer mutex.Unlock()

	if proto != "tcp" && proto != "udp" {
		return 0, ErrUnknownProtocol
	}

	if ip == nil {
		ip = defaultIP
	}
	ipstr := ip.String()
	protomap, ok := globalMap[ipstr]
	if !ok {
		protomap = newProtoMap()
		globalMap[ipstr] = protomap
	}
	mapping := protomap[proto]
	if port > 0 {
		if _, ok := mapping.p[port]; !ok {
			mapping.p[port] = struct{}{}
			return port, nil
		}
		return 0, NewErrPortAlreadyAllocated(ipstr, port)
	}

	port, err := mapping.findPort()
	if err != nil {
		return 0, err
	}
	return port, nil
}
示例#2
1
func (n *network) deleteSvcRecords(name string, epIP net.IP, ipMapUpdate bool) {
	c := n.getController()
	c.Lock()
	defer c.Unlock()
	sr, ok := c.svcDb[n.ID()]
	if !ok {
		return
	}

	if ipMapUpdate {
		delete(sr.ipMap, netutils.ReverseIP(epIP.String()))
	}

	ipList := sr.svcMap[name]
	for i, ip := range ipList {
		if ip.Equal(epIP) {
			ipList = append(ipList[:i], ipList[i+1:]...)
			break
		}
	}
	sr.svcMap[name] = ipList

	if len(ipList) == 0 {
		delete(sr.svcMap, name)
	}
}
示例#3
0
// NodeAddresses returns the NodeAddresses of the instance with the specified nodeName.
func (v *OVirtCloud) NodeAddresses(nodeName types.NodeName) ([]api.NodeAddress, error) {
	name := mapNodeNameToInstanceName(nodeName)
	instance, err := v.fetchInstance(name)
	if err != nil {
		return nil, err
	}

	var address net.IP

	if instance.IPAddress != "" {
		address = net.ParseIP(instance.IPAddress)
		if address == nil {
			return nil, fmt.Errorf("couldn't parse address: %s", instance.IPAddress)
		}
	} else {
		resolved, err := net.LookupIP(name)
		if err != nil || len(resolved) < 1 {
			return nil, fmt.Errorf("couldn't lookup address: %s", name)
		}
		address = resolved[0]
	}

	return []api.NodeAddress{
		{Type: api.NodeLegacyHostIP, Address: address.String()},
		{Type: api.NodeInternalIP, Address: address.String()},
		{Type: api.NodeExternalIP, Address: address.String()},
	}, nil
}
示例#4
0
文件: agent.go 项目: nak3/nomad
// findLoopbackDevice iterates through all the interfaces on a machine and
// returns the ip addr, mask of the loopback device
func (a *Agent) findLoopbackDevice() (string, string, string, error) {
	var ifcs []net.Interface
	var err error
	ifcs, err = net.Interfaces()
	if err != nil {
		return "", "", "", err
	}
	for _, ifc := range ifcs {
		addrs, err := ifc.Addrs()
		if err != nil {
			return "", "", "", err
		}
		for _, addr := range addrs {
			var ip net.IP
			switch v := addr.(type) {
			case *net.IPNet:
				ip = v.IP
			case *net.IPAddr:
				ip = v.IP
			}
			if ip.IsLoopback() {
				if ip.To4() == nil {
					continue
				}
				return ifc.Name, ip.String(), addr.String(), nil
			}
		}
	}

	return "", "", "", fmt.Errorf("no loopback devices with IPV4 addr found")
}
示例#5
0
func interfaceGot(index int, pciAddr int, name string, inf *network.Settings) (*InterfaceCreated, error) {
	ip, nw, err := net.ParseCIDR(fmt.Sprintf("%s/%d", inf.IPAddress, inf.IPPrefixLen))
	if err != nil {
		glog.Error("can not parse cidr")
		return &InterfaceCreated{Index: index, PCIAddr: pciAddr, DeviceName: name}, err
	}
	var tmp []byte = nw.Mask
	var mask net.IP = tmp

	rt := []*RouteRule{}
	/* Route rule is generated automaticly on first interface,
	 * or generated on the gateway configured interface. */
	if (index == 0 && inf.Automatic) || (!inf.Automatic && inf.Gateway != "") {
		rt = append(rt, &RouteRule{
			Destination: "0.0.0.0/0",
			Gateway:     inf.Gateway, ViaThis: true,
		})
	}

	return &InterfaceCreated{
		Index:      index,
		PCIAddr:    pciAddr,
		Bridge:     inf.Bridge,
		HostDevice: inf.Device,
		DeviceName: name,
		Fd:         inf.File,
		MacAddr:    inf.Mac,
		IpAddr:     ip.String(),
		NetMask:    mask.String(),
		RouteTable: rt,
	}, nil
}
示例#6
0
// Allocate a network interface
func Allocate(job *engine.Job) engine.Status {
	var (
		ip          *net.IP
		err         error
		id          = job.Args[0]
		requestedIP = net.ParseIP(job.Getenv("RequestedIP"))
	)

	if requestedIP != nil {
		ip, err = ipallocator.RequestIP(bridgeNetwork, &requestedIP)
	} else {
		ip, err = ipallocator.RequestIP(bridgeNetwork, nil)
	}
	if err != nil {
		return job.Error(err)
	}

	out := engine.Env{}
	out.Set("IP", ip.String())
	out.Set("Mask", bridgeNetwork.Mask.String())
	out.Set("Gateway", bridgeNetwork.IP.String())
	out.Set("Bridge", bridgeIface)

	size, _ := bridgeNetwork.Mask.Size()
	out.SetInt("IPPrefixLen", size)

	currentInterfaces.Set(id, &networkInterface{
		IP: *ip,
	})

	out.WriteTo(job.Stdout)

	return engine.StatusOK
}
示例#7
0
// Build a slice of iptables args that are common to from-container and from-host portal rules.
func iptablesCommonPortalArgs(destIP net.IP, addPhysicalInterfaceMatch bool, addDstLocalMatch bool, destPort int, protocol api.Protocol, service proxy.ServicePortName) []string {
	// This list needs to include all fields as they are eventually spit out
	// by iptables-save.  This is because some systems do not support the
	// 'iptables -C' arg, and so fall back on parsing iptables-save output.
	// If this does not match, it will not pass the check.  For example:
	// adding the /32 on the destination IP arg is not strictly required,
	// but causes this list to not match the final iptables-save output.
	// This is fragile and I hope one day we can stop supporting such old
	// iptables versions.
	args := []string{
		"-m", "comment",
		"--comment", service.String(),
		"-p", strings.ToLower(string(protocol)),
		"-m", strings.ToLower(string(protocol)),
		"--dport", fmt.Sprintf("%d", destPort),
	}

	if destIP != nil {
		args = append(args, "-d", fmt.Sprintf("%s/32", destIP.String()))
	}

	if addPhysicalInterfaceMatch {
		args = append(args, "-m", "physdev", "!", "--physdev-is-in")
	}

	if addDstLocalMatch {
		args = append(args, "-m", "addrtype", "--dst-type", "LOCAL")
	}

	return args
}
示例#8
0
func (d *driver) resolvePeer(nid string, peerIP net.IP) (net.HardwareAddr, net.IPMask, net.IP, error) {
	qPayload := fmt.Sprintf("%s %s", string(nid), peerIP.String())
	resp, err := d.serfInstance.Query("peerlookup", []byte(qPayload), nil)
	if err != nil {
		return nil, nil, nil, fmt.Errorf("resolving peer by querying the cluster failed: %v", err)
	}

	respCh := resp.ResponseCh()
	select {
	case r := <-respCh:
		var macStr, maskStr, vtepStr string
		if _, err := fmt.Sscan(string(r.Payload), &macStr, &maskStr, &vtepStr); err != nil {
			return nil, nil, nil, fmt.Errorf("bad response %q for the resolve query: %v", string(r.Payload), err)
		}

		mac, err := net.ParseMAC(macStr)
		if err != nil {
			return nil, nil, nil, fmt.Errorf("failed to parse mac: %v", err)
		}

		return mac, net.IPMask(net.ParseIP(maskStr).To4()), net.ParseIP(vtepStr), nil

	case <-time.After(time.Second):
		return nil, nil, nil, fmt.Errorf("timed out resolving peer by querying the cluster")
	}
}
示例#9
0
文件: networking.go 项目: nhlfr/rkt
// GetIfacesByIP searches for and returns the interfaces with the given IP
// Disregards the subnet mask since not every net.IP object contains
// On success it will return the list of found interfaces
func (n *Networking) GetIfacesByIP(ifaceIP net.IP) ([]net.Interface, error) {
	ifaces, err := net.Interfaces()
	if err != nil {
		return nil, err
	}

	searchAddr := strings.Split(ifaceIP.String(), "/")[0]
	resultInterfaces := make([]net.Interface, 0)

	for _, iface := range ifaces {
		if iface.Flags&net.FlagLoopback != 0 {
			continue
		}

		addrs, err := iface.Addrs()
		if err != nil {
			return nil, errwrap.Wrap(fmt.Errorf("cannot get addresses for interface %v", iface.Name), err)
		}

		for _, addr := range addrs {
			currentAddr := strings.Split(addr.String(), "/")[0]
			if searchAddr == currentAddr {
				resultInterfaces = append(resultInterfaces, iface)
				break
			}
		}
	}

	if len(resultInterfaces) == 0 {
		return nil, fmt.Errorf("no interface found with IP %q", ifaceIP)
	}

	return resultInterfaces, nil
}
示例#10
0
func get_ips() ([]string, error) {
	ips := make([]string, 0)
	ifaces, err := net.Interfaces()
	if err != nil {
		log.Println(err)
		return ips, nil
	}
	for _, iface := range ifaces {
		// log.Println(iface.Name)
		addrs, err := iface.Addrs()
		if err != nil {
			return ips, nil
		}
		for _, addr := range addrs {
			// log.Println(addr.Network(), addr.String())
			var ip net.IP
			switch v := addr.(type) {
			case *net.IPNet:
				ip = v.IP
			case *net.IPAddr:
				ip = v.IP
			}
			// 只保留ipv4地址
			if ip.To4() != nil && ip.String() != "127.0.0.1" {
				ips = append(ips, ip.String())
			}
		}
	}
	return ips, nil
}
示例#11
0
func lookup(stmt *sql.Stmt, IP net.IP, nIP uint32) (*GeoIP, error) {
	var reserved bool
	for _, net := range reservedIPs {
		if net.Contains(IP) {
			reserved = true
			break
		}
	}
	geoip := GeoIP{Ip: IP.String()}
	if reserved {
		geoip.CountryCode = "RD"
		geoip.CountryName = "Reserved"
	} else {
		if err := stmt.QueryRow(nIP).Scan(
			&geoip.CountryCode,
			&geoip.CountryName,
			&geoip.RegionCode,
			&geoip.RegionName,
			&geoip.CityName,
			&geoip.ZipCode,
			&geoip.Latitude,
			&geoip.Longitude,
			&geoip.MetroCode,
			&geoip.AreaCode,
		); err != nil {
			return nil, err
		}
	}
	return &geoip, nil
}
示例#12
0
// Request answers a dhcp request
// Uses etcd as backend
// part of DHCPDataSource interface implementation
func (ds *EtcdDataSource) Request(nic string, currentIP net.IP) (net.IP, error) {
	ds.lockDHCPAssign()
	defer ds.unlockdhcpAssign()

	machines, _ := ds.Machines()

	macExists, ipExists := false, false

	for _, node := range machines {
		thisNodeIP, _ := node.IP()
		ipMatch := thisNodeIP.String() == currentIP.String()
		macMatch := nic == node.Mac().String()

		if ipMatch && macMatch {
			ds.store(node, thisNodeIP)
			return currentIP, nil
		}

		ipExists = ipExists || ipMatch
		macExists = macExists || macMatch

	}
	if ipExists || macExists {
		return nil, errors.New("Missmatch in lease pool")
	}
	macAddress, _ := net.ParseMAC(nic)
	ds.CreateMachine(macAddress, currentIP)
	return currentIP, nil
}
示例#13
0
func (n *network) addSvcRecords(name string, epIP net.IP, ipMapUpdate bool) {
	c := n.getController()
	c.Lock()
	defer c.Unlock()
	sr, ok := c.svcDb[n.ID()]
	if !ok {
		sr = svcInfo{
			svcMap: make(map[string][]net.IP),
			ipMap:  make(map[string]string),
		}
		c.svcDb[n.ID()] = sr
	}

	if ipMapUpdate {
		reverseIP := netutils.ReverseIP(epIP.String())
		if _, ok := sr.ipMap[reverseIP]; !ok {
			sr.ipMap[reverseIP] = name
		}
	}

	ipList := sr.svcMap[name]
	for _, ip := range ipList {
		if ip.Equal(epIP) {
			return
		}
	}
	sr.svcMap[name] = append(sr.svcMap[name], epIP)
}
示例#14
0
func newProxyCommand(proto string, hostIP net.IP, hostPort int, containerIP net.IP, containerPort int, proxyPath string) (userlandProxy, error) {
	path := proxyPath
	if proxyPath == "" {
		cmd, err := exec.LookPath(userlandProxyCommandName)
		if err != nil {
			return nil, err
		}
		path = cmd
	}

	args := []string{
		path,
		"-proto", proto,
		"-host-ip", hostIP.String(),
		"-host-port", strconv.Itoa(hostPort),
		"-container-ip", containerIP.String(),
		"-container-port", strconv.Itoa(containerPort),
	}

	return &proxyCommand{
		cmd: &exec.Cmd{
			Path: path,
			Args: args,
			SysProcAttr: &syscall.SysProcAttr{
				Pdeathsig: syscall.SIGTERM, // send a sigterm to the proxy if the daemon process dies
			},
		},
	}, nil
}
示例#15
0
// 一个接口上的所有ip4地址
func addrsOfOneInterface(iface net.Interface) (addrs []*net.IPAddr) {
	ifaddrs, err := iface.Addrs()

	if (err != nil) || (len(ifaddrs) == 0) {
		return
	}

	for _, ifaddr := range ifaddrs {
		var ip net.IP
		switch v := ifaddr.(type) {
		case *net.IPNet:
			ip = v.IP
		case *net.IPAddr:
			ip = v.IP
		default:
			continue
		}
		if ip.IsLoopback() {
			return
		}
		ip = ip.To4()
		if ip != nil {
			addr, _ := net.ResolveIPAddr("ip", ip.String())
			addrs = append(addrs, addr)
		}
	}
	return
}
示例#16
0
//
// 获取带有指定Prefix的Ip
//
func GetIpWithPrefix(prefix string) string {

	ifaces, _ := net.Interfaces()
	// handle err
	for _, i := range ifaces {
		addrs, _ := i.Addrs()
		// handle err
		for _, addr := range addrs {
			var ip net.IP
			switch v := addr.(type) {
			case *net.IPNet:
				ip = v.IP
			case *net.IPAddr:
				ip = v.IP
			}

			ipAddr := ip.String()
			// fmt.Println("ipAddr: ", ipAddr)
			if strings.HasPrefix(ipAddr, prefix) {
				return ipAddr
			}

		}
	}
	return ""
}
示例#17
0
// Gets the ipv4 addr for a network interface
func (f *NetworkFingerprint) ipAddress(intf *net.Interface) (string, error) {
	var addrs []net.Addr
	var err error

	if addrs, err = f.interfaceDetector.Addrs(intf); err != nil {
		return "", err
	}

	if len(addrs) == 0 {
		return "", errors.New(fmt.Sprintf("Interface %s has no IP address", intf.Name))
	}
	for _, addr := range addrs {
		var ip net.IP
		switch v := (addr).(type) {
		case *net.IPNet:
			ip = v.IP
		case *net.IPAddr:
			ip = v.IP
		}
		if ip.To4() != nil {
			return ip.String(), nil
		}
	}

	return "", fmt.Errorf("Couldn't parse IP address for interface %s", intf.Name)

}
示例#18
0
// CreateMasterServiceIfNeeded will create the specified service if it
// doesn't already exist.
func (c *Controller) CreateMasterServiceIfNeeded(serviceName string, serviceIP net.IP, servicePort int) error {
	ctx := api.NewDefaultContext()
	if _, err := c.ServiceRegistry.GetService(ctx, serviceName); err == nil {
		// The service already exists.
		return nil
	}
	svc := &api.Service{
		ObjectMeta: api.ObjectMeta{
			Name:      serviceName,
			Namespace: api.NamespaceDefault,
			Labels:    map[string]string{"provider": "kubernetes", "component": "apiserver"},
		},
		Spec: api.ServiceSpec{
			Ports: []api.ServicePort{{Port: servicePort, Protocol: api.ProtocolTCP, TargetPort: util.NewIntOrStringFromInt(servicePort)}},
			// maintained by this code, not by the pod selector
			Selector:        nil,
			ClusterIP:       serviceIP.String(),
			SessionAffinity: api.ServiceAffinityNone,
			Type:            api.ServiceTypeClusterIP,
		},
	}

	if err := rest.BeforeCreate(rest.Services, ctx, svc); err != nil {
		return err
	}

	_, err := c.ServiceRegistry.CreateService(ctx, svc)
	if err != nil && errors.IsAlreadyExists(err) {
		err = nil
	}
	return err
}
示例#19
0
// Build a slice of iptables args for a portal rule.
func iptablesPortalArgs(destIP net.IP, destPort int, protocol api.Protocol, proxyIP net.IP, proxyPort int, service string) []string {
	args := []string{
		"-m", "comment",
		"--comment", service,
		"-p", strings.ToLower(string(protocol)),
		"-d", destIP.String(),
		"--dport", fmt.Sprintf("%d", destPort),
	}
	// This is tricky.  If the proxy is bound (see Proxier.listenAddress)
	// to 0.0.0.0 ("any interface") or 127.0.0.1, we can use REDIRECT,
	// which will bring packets back to the host's loopback interface.  If
	// the proxy is bound to any other interface, then it is not listening
	// on the hosts's loopback, so we have to use DNAT to that specific
	// IP.  We can not simply use DNAT to 127.0.0.1 in the first case
	// because from within a container, 127.0.0.1 is the container's
	// loopback interface, not the host's.
	//
	// Why would anyone bind to an address that is not inclusive of
	// localhost?  Apparently some cloud environments have their public IP
	// exposed as a real network interface AND do not have firewalling.  We
	// don't want to expose everything out to the world.
	//
	// Unfortunately, I don't know of any way to listen on some (N > 1)
	// interfaces but not ALL interfaces, short of doing it manually, and
	// this is simpler than that.
	if proxyIP.Equal(zeroIP) || proxyIP.Equal(localhostIP) {
		args = append(args, "-j", "REDIRECT", "--to-ports", fmt.Sprintf("%d", proxyPort))
	} else {
		args = append(args, "-j", "DNAT", "--to-destination", fmt.Sprintf("%s:%d", proxyIP.String(), proxyPort))
	}
	return args
}
示例#20
0
// setEndpoints sets the endpoints for the given service.
// in a multi-master scenario only the master will be publishing an endpoint.
// see SchedulerServer.bootstrap.
func (m *SchedulerServer) setEndpoints(serviceName string, ip net.IP, port int) error {
	// The setting we want to find.
	want := []api.EndpointSubset{{
		Addresses: []api.EndpointAddress{{IP: ip.String()}},
		Ports:     []api.EndpointPort{{Port: port, Protocol: api.ProtocolTCP}},
	}}

	ctx := api.NewDefaultContext()
	e, err := m.client.Endpoints(api.NamespaceValue(ctx)).Get(serviceName)
	createOrUpdate := m.client.Endpoints(api.NamespaceValue(ctx)).Update
	if err != nil {
		if errors.IsNotFound(err) {
			createOrUpdate = m.client.Endpoints(api.NamespaceValue(ctx)).Create
		}
		e = &api.Endpoints{
			ObjectMeta: api.ObjectMeta{
				Name:      serviceName,
				Namespace: api.NamespaceDefault,
			},
		}
	}
	if !reflect.DeepEqual(e.Subsets, want) {
		e.Subsets = want
		glog.Infof("setting endpoints for master service %q to %#v", serviceName, e)
		_, err = createOrUpdate(e)
		return err
	}
	// We didn't make any changes, no need to actually call update.
	return nil
}
示例#21
0
// Marks a port as being owned by a particular service, or returns error if already claimed.
// Idempotent: reclaiming with the same owner is not an error
func (proxier *Proxier) claimNodePort(ip net.IP, port int, protocol api.Protocol, owner proxy.ServicePortName) error {
	proxier.portMapMutex.Lock()
	defer proxier.portMapMutex.Unlock()

	// TODO: We could pre-populate some reserved ports into portMap and/or blacklist some well-known ports

	key := portMapKey{ip: ip.String(), port: port, protocol: protocol}
	existing, found := proxier.portMap[key]
	if !found {
		// Hold the actual port open, even though we use iptables to redirect
		// it.  This ensures that a) it's safe to take and b) that stays true.
		// NOTE: We should not need to have a real listen()ing socket - bind()
		// should be enough, but I can't figure out a way to e2e test without
		// it.  Tools like 'ss' and 'netstat' do not show sockets that are
		// bind()ed but not listen()ed, and at least the default debian netcat
		// has no way to avoid about 10 seconds of retries.
		socket, err := newProxySocket(protocol, ip, port)
		if err != nil {
			return fmt.Errorf("can't open node port for %s: %v", key.String(), err)
		}
		proxier.portMap[key] = &portMapValue{owner: owner, socket: socket}
		glog.V(2).Infof("Claimed local port %s", key.String())
		return nil
	}
	if existing.owner == owner {
		// We are idempotent
		return nil
	}
	return fmt.Errorf("Port conflict detected on port %s.  %v vs %v", key.String(), owner, existing)
}
示例#22
0
func GetServerIP() string {
	ifaces, err := net.Interfaces()
	if err != nil {
		log.Panic("Can't acess the network interfaces.")
	}
	var ip net.IP
	for _, i := range ifaces {
		addrs, err := i.Addrs()
		if err != nil {
			log.Panic("Can't read the IP.")
		}
		for _, addr := range addrs {
			switch v := addr.(type) {
			case *net.IPNet:
				//log.Printf("Evaluating IPNet: %v\r\n", v.IP)
				if (v.IP.To4() != nil) && !v.IP.IsLinkLocalUnicast() && !v.IP.IsLoopback() && !v.IP.IsMulticast() {
					ip = v.IP
				}
			case *net.IPAddr:
				//log.Printf("Evaluating IPAddr: %v\r\n", v.IP)
				if (v.IP.To4() != nil) && !v.IP.IsLinkLocalUnicast() && !v.IP.IsLoopback() && !v.IP.IsMulticast() {
					ip = v.IP
				}
			}
		}
	}
	// process IP address
	return ip.String()
}
示例#23
0
// Build a slice of iptables args for a from-host portal rule.
func (proxier *Proxier) iptablesHostPortalArgs(destIP net.IP, addDstLocalMatch bool, destPort int, protocol api.Protocol, proxyIP net.IP, proxyPort int, service proxy.ServicePortName) []string {
	args := iptablesCommonPortalArgs(destIP, false, addDstLocalMatch, destPort, protocol, service)

	// This is tricky.
	//
	// If the proxy is bound (see Proxier.listenIP) to 0.0.0.0 ("any
	// interface") we want to do the same as from-container traffic and use
	// REDIRECT.  Except that it doesn't work (empirically).  REDIRECT on
	// local packets sends the traffic to localhost (special case, but it is
	// documented) but the response comes from the eth0 IP (not sure why,
	// truthfully), which makes DNS unhappy.
	//
	// So we have to use DNAT.  DNAT to 127.0.0.1 can't work for the same
	// reason.
	//
	// So we do our best to find an interface that is not a loopback and
	// DNAT to that.  This works (again, empirically).
	//
	// If the proxy is bound to a specific IP, then we have to use DNAT to
	// that IP.  Unlike the previous case, this works because the proxy is
	// ONLY listening on that IP, not the bridge.
	//
	// If the proxy is bound to localhost only, this should work, but we
	// don't allow it for now.
	if proxyIP.Equal(zeroIPv4) || proxyIP.Equal(zeroIPv6) {
		proxyIP = proxier.hostIP
	}
	// TODO: Can we DNAT with IPv6?
	args = append(args, "-j", "DNAT", "--to-destination", net.JoinHostPort(proxyIP.String(), strconv.Itoa(proxyPort)))
	return args
}
示例#24
0
func newProxySocket(protocol api.Protocol, ip net.IP, port int) (proxySocket, error) {
	host := ""
	if ip != nil {
		host = ip.String()
	}

	switch strings.ToUpper(string(protocol)) {
	case "TCP":
		listener, err := net.Listen("tcp", net.JoinHostPort(host, strconv.Itoa(port)))
		if err != nil {
			return nil, err
		}
		return &tcpProxySocket{Listener: listener, port: port}, nil
	case "UDP":
		addr, err := net.ResolveUDPAddr("udp", net.JoinHostPort(host, strconv.Itoa(port)))
		if err != nil {
			return nil, err
		}
		conn, err := net.ListenUDP("udp", addr)
		if err != nil {
			return nil, err
		}
		return &udpProxySocket{UDPConn: conn, port: port}, nil
	}
	return nil, fmt.Errorf("unknown protocol %q", protocol)
}
示例#25
0
func (s *Session) handleNodeUp(ip net.IP, port int, waitForBinary bool) {
	if gocqlDebug {
		log.Printf("gocql: Session.handleNodeUp: %s:%d\n", ip.String(), port)
	}
	addr := ip.String()
	host := s.ring.getHost(addr)
	if host != nil {
		if s.cfg.IgnorePeerAddr && host.Peer() != addr {
			host.setPeer(addr)
		}

		if s.cfg.HostFilter != nil {
			if !s.cfg.HostFilter.Accept(host) {
				return
			}
		} else if !s.cfg.Discovery.matchFilter(host) {
			// TODO: remove this when the host selection policy is more sophisticated
			return
		}

		if t := host.Version().nodeUpDelay(); t > 0 && waitForBinary {
			time.Sleep(t)
		}

		host.setPort(port)
		s.pool.hostUp(host)
		s.policy.HostUp(host)
		host.setState(NodeUp)
		return
	}

	s.handleNewNode(ip, port, waitForBinary)
}
示例#26
0
文件: flags.go 项目: jeffweiss/snap
func getIP() string {
	ifaces, err := net.Interfaces()
	if err != nil {
		logger.WithField("_block", "getIP").Error(err)
		return "127.0.0.1"
	}
	for _, i := range ifaces {
		addrs, err := i.Addrs()
		if err != nil {
			logger.WithField("_block", "getIP").Error(err)
			return "127.0.0.1"
		}
		for _, addr := range addrs {
			var ip net.IP
			switch v := addr.(type) {
			case *net.IPAddr:
				ip = v.IP
			case *net.IPNet:
				ip = v.IP
			}
			if ip == nil || ip.IsLoopback() {
				continue
			}
			ip = ip.To4()
			if ip == nil {
				continue // not an ipv4 address
			}
			return ip.String()
		}
	}
	return "127.0.0.1"
}
示例#27
0
func removeEncryption(localIP, remoteIP net.IP, em *encrMap) error {
	em.Lock()
	indices, ok := em.nodes[remoteIP.String()]
	em.Unlock()
	if !ok {
		return nil
	}
	for i, idxs := range indices {
		dir := reverse
		if i == 0 {
			dir = bidir
		}
		fSA, rSA, err := programSA(localIP, remoteIP, idxs, nil, dir, false)
		if err != nil {
			logrus.Warn(err)
		}
		if i != 0 {
			continue
		}
		err = programSP(fSA, rSA, false)
		if err != nil {
			logrus.Warn(err)
		}
	}
	return nil
}
示例#28
0
// GetPrivateIP is used to return the first private IP address
// associated with an interface on the machine
func GetPrivateIP() (net.IP, error) {
	addresses, err := net.InterfaceAddrs()
	if err != nil {
		return nil, fmt.Errorf("Failed to get interface addresses: %v", err)
	}

	// Find private IPv4 address
	for _, rawAddr := range addresses {
		var ip net.IP
		switch addr := rawAddr.(type) {
		case *net.IPAddr:
			ip = addr.IP
		case *net.IPNet:
			ip = addr.IP
		default:
			continue
		}

		if ip.To4() == nil {
			continue
		}
		if !isPrivateIP(ip.String()) {
			continue
		}

		return ip, nil
	}

	return nil, fmt.Errorf("No private IP address found")
}
示例#29
0
// GetPrivateIP returns the first private IP address found in a list of
// addresses.
func GetPrivateIP(addresses []net.Addr) (net.IP, error) {
	var candidates []net.IP

	// Find private IPv4 address
	for _, rawAddr := range addresses {
		var ip net.IP
		switch addr := rawAddr.(type) {
		case *net.IPAddr:
			ip = addr.IP
		case *net.IPNet:
			ip = addr.IP
		default:
			continue
		}

		if ip.To4() == nil {
			continue
		}
		if !IsPrivateIP(ip.String()) {
			continue
		}
		candidates = append(candidates, ip)
	}
	numIps := len(candidates)
	switch numIps {
	case 0:
		return nil, fmt.Errorf("No private IP address found")
	case 1:
		return candidates[0], nil
	default:
		return nil, fmt.Errorf("Multiple private IPs found. Please configure one.")
	}
}
示例#30
0
// Add virtual tunnel end point. This is mainly used for mapping remote vtep IP
// to ofp port number.
func (self *Vrouter) AddVtepPort(portNo uint32, remoteIp net.IP) error {
	// Install a flow entry for default VNI/vlan and point it to IP table
	portVlanFlow, err := self.vlanTable.NewFlow(ofctrl.FlowMatch{
		Priority:  FLOW_MATCH_PRIORITY,
		InputPort: portNo,
	})
	if err != nil && strings.Contains(err.Error(), "Flow already exists") {
		log.Infof("VTEP %s already exists", remoteIp.String())
		return nil
	} else if err != nil {
		log.Errorf("Error adding Flow for VTEP %v. Err: %v", remoteIp, err)
		return err
	}

	// FIXME: Need to match on tunnelId and set vlan-id per VRF
	// FIXME: not needed till multi-vrf support. We cant pop vlan unless flow matches on vlan
	// portVlanFlow.SetVlan(1)

	// Point it to next table.
	// Note that we bypass policy lookup on dest host.
	portVlanFlow.Next(self.ipTable)

	// FIXME: walk all the routes and see if we can install it
	//        This could happen if a route made it to us before VTEP

	return nil
}