Golang InterfaceByName示例

说明

golang interfacebyname示例是从最受好评的开源项目中提取的实现代码,你可以参考下面示例的使用方式。

编程语言: Golang

命名空间/包名称: net

示例#1
文件: init.go 项目: devick/flynn

func setupNetworking(c *Config) error {
	if c.IP == "" {
		return nil
	}

	// loopback
	iface, err := net.InterfaceByName("lo")
	if err != nil {
		return fmt.Errorf("Unable to set up networking: %v", err)
	}
	if err := netlink.NetworkLinkUp(iface); err != nil {
		return fmt.Errorf("Unable to set up networking: %v", err)
	}
	if iface, err = net.InterfaceByName("eth0"); err != nil {
		return fmt.Errorf("Unable to set up networking: %v", err)
	}
	ip, ipNet, err := net.ParseCIDR(c.IP)
	if err != nil {
		return fmt.Errorf("Unable to set up networking: %v", err)
	}
	if err := netlink.NetworkLinkAddIp(iface, ip, ipNet); err != nil {
		return fmt.Errorf("Unable to set up networking: %v", err)
	}
	if c.Gateway != "" {
		if err := netlink.AddDefaultGw(c.Gateway, "eth0"); err != nil {
			return fmt.Errorf("Unable to set up networking: %v", err)
		}
	}
	if err := netlink.NetworkLinkUp(iface); err != nil {
		return fmt.Errorf("Unable to set up networking: %v", err)
	}

	return nil
}

示例#2
文件: init.go 项目: snormore/flynn

func setupNetworking(args *ContainerInitArgs) error {
	// loopback
	iface, err := net.InterfaceByName("lo")
	if err != nil {
		return fmt.Errorf("Unable to set up networking: %v", err)
	}
	if err := netlink.NetworkLinkUp(iface); err != nil {
		return fmt.Errorf("Unable to set up networking: %v", err)
	}
	if args.ip != "" {
		if iface, err = net.InterfaceByName("eth0"); err != nil {
			return fmt.Errorf("Unable to set up networking: %v", err)
		}
		ip, ipNet, err := net.ParseCIDR(args.ip)
		if err != nil {
			return fmt.Errorf("Unable to set up networking: %v", err)
		}
		if err := netlink.NetworkLinkAddIp(iface, ip, ipNet); err != nil {
			return fmt.Errorf("Unable to set up networking: %v", err)
		}
		if args.gateway != "" {
			if err := netlink.AddDefaultGw(args.gateway, "eth0"); err != nil {
				return fmt.Errorf("Unable to set up networking: %v", err)
			}
		}
		if err := netlink.NetworkLinkUp(iface); err != nil {
			return fmt.Errorf("Unable to set up networking: %v", err)
		}
	}

	return nil
}

示例#3
文件: link_linux.go 项目: RoPe93/oz

// NewLinkWithOptions creates new network link on Linux host and sets some of its network
// parameters passed in as LinkOptions
//
// Calling NewLinkWithOptions is equivalent of running following commands one after another if
// particular option is passed in as a parameter:
// 		ip link add name ${ifcName} type dummy
// 		ip link set dev ${ifcName} address ${MAC address}
//		ip link set dev ${ifcName} mtu ${MTU value}
//		ip link set dev ${ifcName} up
// NewLinkWithOptions returns Linker which is initialized to a pointer of type Link if the network
// link with given LinkOptions was created successfully on the Linux host.
// It attempts to delete the link if any of the LinkOptions are incorrect or if setting the options
// failed and returns error.
func NewLinkWithOptions(ifcName string, opts LinkOptions) (Linker, error) {
	if ok, err := NetInterfaceNameValid(ifcName); !ok {
		return nil, err
	}

	if _, err := net.InterfaceByName(ifcName); err == nil {
		return nil, fmt.Errorf("Interface name %s already assigned on the host", ifcName)
	}

	if err := netlink.NetworkLinkAdd(ifcName, "dummy"); err != nil {
		return nil, fmt.Errorf("Could not create new link %s: %s", ifcName, err)
	}

	newIfc, err := net.InterfaceByName(ifcName)
	if err != nil {
		return nil, fmt.Errorf("Could not find the new interface: %s", err)
	}

	if (opts != LinkOptions{}) {
		errOpts := setLinkOptions(newIfc, opts)
		if errOpts != nil {
			if errDel := DeleteLink(newIfc.Name); err != nil {
				return nil, fmt.Errorf("Incorrect options specified: %s. Attempt to delete the link failed: %s",
					errOpts, errDel)
			}
			return nil, fmt.Errorf("Could not set link options: %s", errOpts)
		}
	}

	return &Link{
		ifc: newIfc,
	}, nil
}

示例#4
文件: macvtap_linux.go 项目: Safe3/oz

// NewMacVtapLink creates macvtap network link
//
// It is equivalent of running:
//		ip link add name mvt${RANDOM STRING} link ${master interface} type macvtap
// NewMacVtapLink returns MacVtaper which is initialized to a pointer of type MacVtapLink if the
// macvtap link was created successfully on the Linux host. Newly created link is assigned
// a random name starting with "mvt". It sets the macvlan mode to "bridge" which is a default.
// It returns error if the link could not be created.
func NewMacVtapLink(masterDev string) (MacVtaper, error) {
	macVtapDev := makeNetInterfaceName("mvt")

	if ok, err := NetInterfaceNameValid(masterDev); !ok {
		return nil, err
	}

	if _, err := net.InterfaceByName(masterDev); err != nil {
		return nil, fmt.Errorf("Master MAC VTAP device %s does not exist on the host", masterDev)
	}

	if err := netlink.NetworkLinkAddMacVtap(masterDev, macVtapDev, default_mode); err != nil {
		return nil, err
	}

	macVtapIfc, err := net.InterfaceByName(macVtapDev)
	if err != nil {
		return nil, fmt.Errorf("Could not find the new interface: %s", err)
	}

	masterIfc, err := net.InterfaceByName(masterDev)
	if err != nil {
		return nil, fmt.Errorf("Could not find the new interface: %s", err)
	}

	return &MacVtapLink{
		MacVlanLink: &MacVlanLink{
			Link: Link{
				ifc: macVtapIfc,
			},
			masterIfc: masterIfc,
			mode:      default_mode,
		},
	}, nil
}

示例#5
文件: network_linux.go 项目: pirater/os

// attach a container network interface to an external network
func (v *veth) attach(n *configs.Network) (err error) {
	bridge, err := net.InterfaceByName(n.Bridge)
	if err != nil {
		return err
	}
	host, err := net.InterfaceByName(n.HostInterfaceName)
	if err != nil {
		return err
	}
	if err := netlink.AddToBridge(host, bridge); err != nil {
		return err
	}
	if err := netlink.NetworkSetMTU(host, n.Mtu); err != nil {
		return err
	}
	if n.HairpinMode {
		if err := netlink.SetHairpinMode(host, true); err != nil {
			return err
		}
	}
	if err := netlink.NetworkLinkUp(host); err != nil {
		return err
	}

	return nil
}

示例#6
文件: veth_linux.go 项目: xSmurf/tenus

// NewVethPair creates a pair of veth network links.
//
// It is equivalent of running:
// 		ip link add name veth${RANDOM STRING} type veth peer name veth${RANDOM STRING}.
// NewVethPair returns Vether which is initialized to a pointer of type VethPair if the
// veth link was successfully created on Linux host. Newly created pair of veth links
// are assigned random names starting with "veth".
// NewVethPair returns error if the veth pair could not be created.
func NewVethPair() (Vether, error) {
	ifcName := makeNetInterfaceName("veth")
	peerName := makeNetInterfaceName("veth")

	if err := netlink.NetworkCreateVethPair(ifcName, peerName, 0); err != nil {
		return nil, err
	}

	newIfc, err := net.InterfaceByName(ifcName)
	if err != nil {
		return nil, fmt.Errorf("Could not find the new interface: %s", err)
	}

	peerIfc, err := net.InterfaceByName(peerName)
	if err != nil {
		return nil, fmt.Errorf("Could not find the new interface: %s", err)
	}

	return &VethPair{
		Link: Link{
			ifc: newIfc,
		},
		peerIfc: peerIfc,
	}, nil
}

示例#7
文件: bridge_linux.go 项目: cloudfoundry/guardian

// Create creates a bridge device and returns the interface.
// If the device already exists, returns the existing interface.
func (Bridge) Create(name string, ip net.IP, subnet *net.IPNet) (intf *net.Interface, err error) {
	netlinkMu.Lock()
	defer netlinkMu.Unlock()

	if intf, _ := net.InterfaceByName(name); intf != nil {
		return intf, nil
	}

	link := &netlink.Bridge{LinkAttrs: netlink.LinkAttrs{Name: name}}

	if err := netlink.LinkAdd(link); err != nil && err.Error() != "file exists" {
		return nil, fmt.Errorf("devices: create bridge: %v", err)
	}

	hAddr, _ := net.ParseMAC(randMacAddr())
	err = netlink.LinkSetHardwareAddr(link, hAddr)
	if err != nil {
		return nil, fmt.Errorf("devices: set hardware address: %v", err)
	}

	if intf, err = net.InterfaceByName(name); err != nil {
		return nil, fmt.Errorf("devices: look up created bridge interface: %v", err)
	}

	addr := &netlink.Addr{IPNet: &net.IPNet{IP: ip, Mask: subnet.Mask}}
	if err = netlink.AddrAdd(link, addr); err != nil && err.Error() != "file exists" {
		return nil, fmt.Errorf("devices: add IP to bridge: %v", err)
	}
	return intf, nil
}

示例#8
文件: monitor.go 项目: zakkymuha/simple-router

func (mon *Monitor) Run(m *monitor.Monitor) {
	memory := GetMemoryStats()

	lanEth, _ := net.InterfaceByName("eth1")
	wanEth, _ := net.InterfaceByName("eth0")

	iData := InterfaceData{lanEth, wanEth}

	mon1 := HWMon{"hwmon0", []string{"2", "3"}}
	mon2 := HWMon{"hwmon1", []string{"1"}}

	temps1, err := mon1.Temperatures()
	if err != nil {
		panic(err)
	}
	temps2, err := mon2.Temperatures()
	if err != nil {
		panic(err)
	}

	allTemps := make(map[string]float64)
	for key, value := range temps1 {
		allTemps[key] = value
	}

	for key, value := range temps2 {
		allTemps[key] = value
	}

	data := Data{memory, iData, allTemps}

	m.SendData(&data)
}

示例#9
文件: netlink_linux_test.go 项目: NERSC/docker

//
// netlink package tests which do not use RTNETLINK
//
func TestCreateBridgeWithMac(t *testing.T) {
	if testing.Short() {
		return
	}

	name := "testbridge"

	if err := CreateBridge(name, true); err != nil {
		t.Fatal(err)
	}

	if _, err := net.InterfaceByName(name); err != nil {
		t.Fatal(err)
	}

	// cleanup and tests

	if err := DeleteBridge(name); err != nil {
		t.Fatal(err)
	}

	if _, err := net.InterfaceByName(name); err == nil {
		t.Fatalf("expected error getting interface because %s bridge was deleted", name)
	}
}

示例#10
文件: bridge_linux.go 项目: sysbot/tenus

// NewBridge creates new network bridge on Linux host.
//
// It is equivalent of running: ip link add name br${RANDOM STRING} type bridge
// NewBridge returns Bridger which is initialized to a pointer of type Bridge if the
// bridge was created successfully on the Linux host. Newly created bridge is assigned
// a random name starting with "br".
// It returns error if the bridge could not be created.
func NewBridge() (Bridger, error) {
	brDev := makeNetInterfaceName("br")

	if ok, err := NetInterfaceNameValid(brDev); !ok {
		return nil, err
	}

	if _, err := net.InterfaceByName(brDev); err == nil {
		return nil, fmt.Errorf("Interface name %s already assigned on the host", brDev)
	}

	if err := netlink.NetworkLinkAdd(brDev, "bridge"); err != nil {
		return nil, err
	}

	newIfc, err := net.InterfaceByName(brDev)
	if err != nil {
		return nil, fmt.Errorf("Could not find the new interface: %s", err)
	}

	return &Bridge{
		Link: Link{
			ifc: newIfc,
		},
	}, nil
}

示例#11
文件: network_linux.go 项目: hyperhq/runv

func GetTapFd(tapname, bridge string) (device string, tapFile *os.File, err error) {
	var (
		req   ifReq
		errno syscall.Errno
	)

	tapFile, err = os.OpenFile("/dev/net/tun", os.O_RDWR, 0)
	if err != nil {
		return "", nil, err
	}

	req.Flags = CIFF_TAP | CIFF_NO_PI | CIFF_ONE_QUEUE
	if tapname != "" {
		copy(req.Name[:len(req.Name)-1], []byte(tapname))
	}
	_, _, errno = syscall.Syscall(syscall.SYS_IOCTL, tapFile.Fd(),
		uintptr(syscall.TUNSETIFF),
		uintptr(unsafe.Pointer(&req)))
	if errno != 0 {
		err = fmt.Errorf("create tap device failed\n")
		tapFile.Close()
		return "", nil, err
	}

	device = strings.Trim(string(req.Name[:]), "\x00")

	tapIface, err := net.InterfaceByName(device)
	if err != nil {
		glog.Errorf("get interface by name %s failed %s", device, err)
		tapFile.Close()
		return "", nil, err
	}

	bIface, err := net.InterfaceByName(bridge)
	if err != nil {
		glog.Errorf("get interface by name %s failed", bridge)
		tapFile.Close()
		return "", nil, err
	}

	err = AddToBridge(tapIface, bIface)
	if err != nil {
		glog.Errorf("Add to bridge failed %s %s", bridge, device)
		tapFile.Close()
		return "", nil, err
	}

	err = NetworkLinkUp(tapIface)
	if err != nil {
		glog.Errorf("Link up device %s failed", device)
		tapFile.Close()
		return "", nil, err
	}

	return device, tapFile, nil

}

示例#12
文件: network_linux.go 项目: alena1108/kubernetes

func (v *veth) initialize(config *network) error {
	peer := config.TempVethPeerName
	if peer == "" {
		return fmt.Errorf("peer is not specified")
	}
	child, err := net.InterfaceByName(peer)
	if err != nil {
		return err
	}
	if err := netlink.NetworkLinkDown(child); err != nil {
		return err
	}
	if err := netlink.NetworkChangeName(child, config.Name); err != nil {
		return err
	}
	// get the interface again after we changed the name as the index also changes.
	if child, err = net.InterfaceByName(config.Name); err != nil {
		return err
	}
	if config.MacAddress != "" {
		if err := netlink.NetworkSetMacAddress(child, config.MacAddress); err != nil {
			return err
		}
	}
	ip, ipNet, err := net.ParseCIDR(config.Address)
	if err != nil {
		return err
	}
	if err := netlink.NetworkLinkAddIp(child, ip, ipNet); err != nil {
		return err
	}
	if config.IPv6Address != "" {
		if ip, ipNet, err = net.ParseCIDR(config.IPv6Address); err != nil {
			return err
		}
		if err := netlink.NetworkLinkAddIp(child, ip, ipNet); err != nil {
			return err
		}
	}
	if err := netlink.NetworkSetMTU(child, config.Mtu); err != nil {
		return err
	}
	if err := netlink.NetworkLinkUp(child); err != nil {
		return err
	}
	if config.Gateway != "" {
		if err := netlink.AddDefaultGw(config.Gateway, config.Name); err != nil {
			return err
		}
	}
	if config.IPv6Gateway != "" {
		if err := netlink.AddDefaultGw(config.IPv6Gateway, config.Name); err != nil {
			return err
		}
	}
	return nil
}

示例#13
文件: manager.go 项目: ModelRocket/openstorage

func ExternalIp(config *config.ClusterConfig) (string, string, error) {
	mgmtIp := ""
	dataIp := ""

	if config.MgtIface != "" {
		iface, err := net.InterfaceByName(config.MgtIface)
		if err != nil {
			return "", "", errors.New("Invalid management network " +
				"interface specified.")
		}
		mgmtIp, err = ifaceToIp(iface)
		if err != nil {
			return "", "", err
		}
	}

	if config.DataIface != "" {
		iface, err := net.InterfaceByName(config.DataIface)
		if err != nil {
			return "", "", errors.New("Invalid data network interface " +
				"specified.")
		}
		dataIp, err = ifaceToIp(iface)
		if err != nil {
			return "", "", err
		}
	}

	if mgmtIp != "" && dataIp != "" {
		return mgmtIp, dataIp, nil
	} else if mgmtIp != "" { // dataIp is empty
		return mgmtIp, mgmtIp, nil
	} else if dataIp != "" { // mgmtIp is empty
		return dataIp, dataIp, nil
	} // both are empty, try to pick first available interface for both

	// No network interface specified, pick first default.
	ifaces, err := net.Interfaces()
	if err != nil {
		return "", "", err
	}
	for _, iface := range ifaces {
		if iface.Flags&net.FlagUp == 0 {
			continue // interface down
		}
		if iface.Flags&net.FlagLoopback != 0 {
			continue // loopback interface
		}

		mgmtIp, err = ifaceToIp(&iface)
		return mgmtIp, mgmtIp, err
	}

	return "", "", errors.New("Node not connected to the network.")
}

示例#14
文件: veth_linux_test.go 项目: drptbl/oz

func Test_NewVethPairWithOptions(t *testing.T) {
	for _, tt := range vethOptionTests {
		tl := &testLink{}

		if err := tl.prepTestLink(tt.hostIfc, ""); err != nil {
			t.Skipf("NewVlanLink test requries external command: %v", err)
		}

		veth, err := NewVethPairWithOptions(tt.hostIfc, tt.vethOptions)
		if err != nil {
			t.Fatalf("NewVethPairWithOptions(%s, %v) failed to run: %s", tt.hostIfc, tt.vethOptions, err)
		}

		if _, err := net.InterfaceByName(tt.hostIfc); err != nil {
			t.Fatalf("Could not find %s on the host: %s", tt.hostIfc, err)
		}

		if _, err := net.InterfaceByName(tt.vethOptions.PeerName); err != nil {
			t.Fatalf("Could not find %s on the host: %s", tt.vethOptions.PeerName, err)
		}

		vethIfcName := veth.NetInterface().Name
		if vethIfcName != tt.hostIfc {
			tl.teardown()
			t.Fatalf("NewVethPairWithOptions(%s, %v) failed: expected host ifc %s, returned %s",
				tt.hostIfc, tt.vethOptions, tt.hostIfc, vethIfcName)
		}

		vethPeerName := veth.PeerNetInterface().Name
		if vethPeerName != tt.vethOptions.PeerName {
			tl.teardown()
			t.Fatalf("NewVethPairWithOptions(%s, %v) failed: expected peer ifc %s, returned %s",
				tt.hostIfc, tt.vethOptions, tt.vethOptions.PeerName, vethPeerName)
		}

		testRes, err := linkInfo(tt.hostIfc, "veth")
		if err != nil {
			tl.teardown()
			t.Fatalf("Failed to list %s operation mode: %s", tt.hostIfc, err)
		}

		if testRes.linkType != "veth" {
			tl.teardown()
			t.Fatalf("NewVethPairWithOptions(%s, %v) failed: expected linktype veth, returned %s",
				tt.hostIfc, tt.vethOptions, testRes.linkType)
		}

		if err := tl.teardown(); err != nil {
			t.Fatalf("testLink.teardown failed: %v", err)
		} else {
			time.Sleep(10 * time.Millisecond)
		}
	}
}

示例#15
文件: network.go 项目: jpgbus/docker

func SetInterfaceMaster(name, master string) error {
	iface, err := net.InterfaceByName(name)
	if err != nil {
		return err
	}
	masterIface, err := net.InterfaceByName(master)
	if err != nil {
		return err
	}
	return netlink.NetworkSetMaster(iface, masterIface)
}

示例#16
文件: util_multicast.go 项目: gudTECH/scamp-go

func LoopbackInterface() (lo *net.Interface, err error) {
	lo, err = net.InterfaceByName("lo0")
	if err != nil {
		lo, err = net.InterfaceByName("lo")
		if err != nil {
			Error.Printf("could not find `lo0` or `lo`: `%s`", err)
			return
		}
	}

	return
}

示例#17
文件: main.go 项目: sykesm/container-networking-release

func createVethPair(handle string, wshdPID int, containerIP string, containerIPAddressMask int, containerMTU int) (string, error) {
	hostIfName := fmt.Sprintf("o-%s-0", handle)
	containerIfName := fmt.Sprintf("o-%s-1", handle)

	vethCreator := devices.VethCreator{}
	hostIf, containerIf, err := vethCreator.Create(hostIfName, containerIfName)
	if err != nil {
		if !strings.Contains(err.Error(), "Network interface already exists") {
			return "", err
		}

		hostIf, err = net.InterfaceByName(hostIfName)
		if err != nil {
			return "", err
		}

		containerIf, err = net.InterfaceByName(containerIfName)
		if err != nil && !strings.Contains(err.Error(), "no such network interface") {
			return "", err
		}
	}

	link := devices.Link{}

	if containerIf != nil {
		err = link.SetNs(containerIf, wshdPID)
		if err != nil {
			return "", err
		}
		fmt.Printf("container if: %+v\n", containerIf)
	}

	if hostIf != nil {
		fmt.Printf("host if: %+v\n", hostIf)
	}

	err = runInNamespace(handle, fmt.Sprintf("ip addr add %s/%d dev %s", containerIP, containerIPAddressMask, containerIfName))
	if err != nil && !strings.Contains(err.Error(), "RTNETLINK answers: File exists") {
		return "", err
	}

	err = runInNamespace(handle, fmt.Sprintf("ip link set %s up", containerIfName))
	if err != nil {
		return "", err
	}

	err = runInNamespace(handle, fmt.Sprintf("ip link set dev %s mtu %d", containerIfName, containerMTU))
	if err != nil {
		return "", err
	}

	return hostIfName, nil
}

示例#18
文件: bridge.go 项目: wdxxs2z/docker

func attachVlanInterface(name, bridgeName string) error {
	int1, err := net.InterfaceByName(name)
	if err != nil {
		return err
	}

	int2, err := net.InterfaceByName(bridgeName)
	if err != nil {
		return err
	}

	return dnetlink.NetworkSetMaster(int1, int2)
}

示例#19
文件: bridge.go 项目: Huskyeder/libnetwork

func addToBridge(ifaceName, bridgeName string) error {
	iface, err := net.InterfaceByName(ifaceName)
	if err != nil {
		return fmt.Errorf("could not find interface %s: %v", ifaceName, err)
	}

	master, err := net.InterfaceByName(bridgeName)
	if err != nil {
		return fmt.Errorf("could not find bridge %s: %v", bridgeName, err)
	}

	return bri.AddToBridge(iface, master)
}

示例#20
文件: network_linux.go 项目: pirater/os

func (v *veth) detach(n *configs.Network) (err error) {
	bridge, err := net.InterfaceByName(n.Bridge)
	if err != nil {
		return err
	}
	host, err := net.InterfaceByName(n.HostInterfaceName)
	if err != nil {
		return err
	}
	if err := netlink.DelFromBridge(host, bridge); err != nil {
		return err
	}
	return nil
}

示例#21
文件: veth_linux.go 项目: xSmurf/tenus

// NewVethPairWithOptions creates a pair of veth network links.
//
// It is equivalent of running:
// 		ip link add name ${first device name} type veth peer name ${second device name}
// NewVethPairWithOptions returns Vether which is initialized to a pointer of type VethPair if the
// veth link was successfully created on the Linux host. It accepts VethOptions which allow you to set
// peer interface name. It returns error if the veth pair could not be created.
func NewVethPairWithOptions(ifcName string, opts VethOptions) (Vether, error) {
	peerName := opts.PeerName
	txQLen := opts.TxQueueLen

	if ok, err := NetInterfaceNameValid(ifcName); !ok {
		return nil, err
	}

	if _, err := net.InterfaceByName(ifcName); err == nil {
		return nil, fmt.Errorf("Interface name %s already assigned on the host", ifcName)
	}

	if peerName != "" {
		if ok, err := NetInterfaceNameValid(peerName); !ok {
			return nil, err
		}

		if _, err := net.InterfaceByName(peerName); err == nil {
			return nil, fmt.Errorf("Interface name %s already assigned on the host", peerName)
		}
	} else {
		peerName = makeNetInterfaceName("veth")
	}

	if txQLen < 0 {
		return nil, fmt.Errorf("TX queue length must be a positive integer: %d", txQLen)
	}

	if err := netlink.NetworkCreateVethPair(ifcName, peerName, txQLen); err != nil {
		return nil, err
	}

	newIfc, err := net.InterfaceByName(ifcName)
	if err != nil {
		return nil, fmt.Errorf("Could not find the new interface: %s", err)
	}

	peerIfc, err := net.InterfaceByName(peerName)
	if err != nil {
		return nil, fmt.Errorf("Could not find the new interface: %s", err)
	}

	return &VethPair{
		Link: Link{
			ifc: newIfc,
		},
		peerIfc: peerIfc,
	}, nil
}

示例#22
文件: network.go 项目: keeb/docker

// Return the IPv4 address of a network interface
func getIfaceAddr(name string) (net.Addr, error) {
	iface, err := net.InterfaceByName(name)
	if err != nil {
		return nil, err
	}
	addrs, err := iface.Addrs()
	if err != nil {
		return nil, err
	}
	var addrs4 []net.Addr
	for _, addr := range addrs {
		ip := (addr.(*net.IPNet)).IP
		if ip4 := ip.To4(); len(ip4) == net.IPv4len {
			addrs4 = append(addrs4, addr)
		}
	}
	switch {
	case len(addrs4) == 0:
		return nil, fmt.Errorf("Interface %v has no IP addresses", name)
	case len(addrs4) > 1:
		fmt.Printf("Interface %v has more than 1 IPv4 address. Defaulting to using %v\n",
			name, (addrs4[0].(*net.IPNet)).IP)
	}
	return addrs4[0], nil
}

示例#23
文件: bridge_linux_test.go 项目: Safe3/oz

func Test_NewBridge(t *testing.T) {
	tl := &testLink{}

	br, err := NewBridge()
	if err != nil {
		t.Fatalf("NewBridge() failed to run: %s", err)
	}

	brName := br.NetInterface().Name
	if err := tl.prepTestLink(brName, "bridge"); err != nil {
		t.Skipf("NewBridge test requries external command: %v", err)
	}

	if _, err := net.InterfaceByName(brName); err != nil {
		tl.teardown()
		t.Fatalf("Could not find %s on the host: %s", brName, err)
	}

	testRes, err := linkInfo(brName, "bridge")
	if err != nil {
		tl.teardown()
		t.Fatalf("Failed to list %s operation mode: %s", brName, err)
	}

	if testRes.linkType != "bridge" {
		tl.teardown()
		t.Fatalf("NewBridge() failed: expected linktype bridge, returned %s", testRes.linkType)
	}

	if err := tl.teardown(); err != nil {
		t.Fatalf("testLink.teardown failed: %v", err)
	} else {
		time.Sleep(10 * time.Millisecond)
	}
}

示例#24
文件: agent.go 项目: Raphaeljunior/docker

func getBindAddr(ifaceName string) (string, error) {
	iface, err := net.InterfaceByName(ifaceName)
	if err != nil {
		return "", fmt.Errorf("failed to find interface %s: %v", ifaceName, err)
	}

	addrs, err := iface.Addrs()
	if err != nil {
		return "", fmt.Errorf("failed to get interface addresses: %v", err)
	}

	for _, a := range addrs {
		addr, ok := a.(*net.IPNet)
		if !ok {
			continue
		}
		addrIP := addr.IP

		if addrIP.IsLinkLocalUnicast() {
			continue
		}

		return addrIP.String(), nil
	}

	return "", fmt.Errorf("failed to get bind address")
}

示例#25
文件: ecc.go 项目: anlaneg/socketplane

func Start(serverMode bool, bootstrap bool, bindInterface string, dataDir string) error {
	bindAddress := ""
	if bindInterface != "" {
		intf, err := net.InterfaceByName(bindInterface)
		if err != nil {
			log.Printf("Error : %v", err)
			return err
		}
		addrs, err := intf.Addrs()
		if err == nil {
			for i := 0; i < len(addrs); i++ {
				addr := addrs[i].String()
				ip, _, _ := net.ParseCIDR(addr)
				if ip != nil && ip.To4() != nil {
					bindAddress = ip.To4().String()
				}
			}
		}
	}
	errCh := make(chan int)
	watchForExistingRegisteredUpdates()
	go RegisterForNodeUpdates(listener)
	go startConsul(serverMode, bootstrap, bindAddress, dataDir, errCh)

	select {
	case <-errCh:
		return errors.New("Error starting Consul Agent")
	case <-time.After(time.Second * 5):
	}
	return nil
}

示例#26
文件: default_linux.go 项目: osrg/gobgp

func GetIPv6LinkLocalNeighborAddress(ifname string) (string, error) {
	ifi, err := net.InterfaceByName(ifname)
	if err != nil {
		return "", err
	}
	neighs, err := netlink.NeighList(ifi.Index, netlink.FAMILY_V6)
	if err != nil {
		return "", err
	}
	cnt := 0
	var addr net.IP
	for _, neigh := range neighs {
		local, err := isLocalLinkLocalAddress(ifi.Index, neigh.IP)
		if err != nil {
			return "", err
		}
		if neigh.IP.IsLinkLocalUnicast() && !local {
			addr = neigh.IP
			cnt += 1
		}
	}

	if cnt == 0 {
		return "", fmt.Errorf("no ipv6 link-local neighbor found")
	} else if cnt > 1 {
		return "", fmt.Errorf("found %d link-local neighbors. only support p2p link", cnt)
	}

	return fmt.Sprintf("%s%%%s", addr, ifname), nil
}

示例#27
文件: networkInterface.go 项目: Psiphon-Labs/psiphon-tunnel-core

// Take in an interface name ("lo", "eth0", "any") passed from either
// a config setting, by using the -listenInterface flag on client or
// -interface flag on server from the command line and return the IP
// address associated with it.
// If no interface is provided use the default loopback interface (127.0.0.1).
// If "any" is passed then listen on 0.0.0.0 for client (invalid with server)
func GetInterfaceIPAddress(listenInterface string) (string, error) {
	var ip net.IP
	if listenInterface == "" {
		ip = net.ParseIP("127.0.0.1")
		return ip.String(), nil
	} else if listenInterface == "any" {
		ip = net.ParseIP("0.0.0.0")
		return ip.String(), nil
	} else {
		availableInterfaces, err := net.InterfaceByName(listenInterface)
		if err != nil {
			return "", common.ContextError(err)
		}

		addrs, err := availableInterfaces.Addrs()
		if err != nil {
			return "", common.ContextError(err)
		}
		for _, addr := range addrs {
			iptype := addr.(*net.IPNet)
			if iptype == nil {
				continue
			}
			// TODO: IPv6 support
			ip = iptype.IP.To4()
			if ip == nil {
				continue
			}
			return ip.String(), nil
		}
	}

	return "", common.ContextError(errors.New("Could not find IP address of specified interface"))

}

示例#28
文件: conn_linux.go 项目: NanXiao/tunnel

func open(c *Conn) error {
	var err error
	c.file, err = os.OpenFile("/dev/net/tun", os.O_RDWR, 0)
	if err != nil {
		return err
	}
	ifr := &ifReq{}
	ifr.Flags = iff_TUN | iff_NO_PI | iff_TUN_EXCL
	_, _, e := syscall.Syscall(syscall.SYS_IOCTL, c.file.Fd(), tunSETIFF, uintptr(unsafe.Pointer(ifr)))
	if e != 0 {
		return syscall.Errno(e)
	}
	i := 0
	for ifr.Name[i] != 0 {
		i++
	}
	s := string(ifr.Name[:i])
	ifi, err := net.InterfaceByName(s)
	if err != nil {
		c.file.Close()
		return err
	}
	c.ifindex = ifi.Index
	return nil
}

示例#29
文件: netlink_linux.go 项目: MohamedFAhmed/heapster

// Add MAC VLAN network interface with masterDev as its upper device
// This is identical to running:
// ip link add name $name link $masterdev type macvlan mode $mode
func networkLinkMacVlan(dev_type string, mcvln *MacVlanLink) error {
	s, err := getNetlinkSocket()
	if err != nil {
		return err
	}
	defer s.Close()

	wb := newNetlinkRequest(syscall.RTM_NEWLINK, syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK)

	masterDevIfc, err := net.InterfaceByName(mcvln.MasterDev)
	if err != nil {
		return err
	}

	msg := newIfInfomsg(syscall.AF_UNSPEC)
	wb.AddData(msg)

	nest1 := newRtAttr(syscall.IFLA_LINKINFO, nil)
	newRtAttrChild(nest1, IFLA_INFO_KIND, nonZeroTerminated(dev_type))

	nest2 := newRtAttrChild(nest1, IFLA_INFO_DATA, nil)
	macVlanData := make([]byte, 4)
	native.PutUint32(macVlanData, mcvln.Mode())
	newRtAttrChild(nest2, IFLA_MACVLAN_MODE, macVlanData)
	wb.AddData(nest1)

	wb.AddData(uint32Attr(syscall.IFLA_LINK, uint32(masterDevIfc.Index)))
	wb.AddData(newRtAttr(syscall.IFLA_IFNAME, zeroTerminated(mcvln.SlaveDev)))

	if err := s.Send(wb); err != nil {
		return err
	}
	return s.HandleAck(wb.Seq)
}

示例#30
文件: netlink_linux.go 项目: MohamedFAhmed/heapster

// Add a new VLAN interface with masterDev as its upper device
// This is identical to running:
// ip link add name $name link $masterdev type vlan id $id
func NetworkLinkAddVlan(masterDev, vlanDev string, vlanId uint16) error {
	s, err := getNetlinkSocket()
	if err != nil {
		return err
	}
	defer s.Close()

	wb := newNetlinkRequest(syscall.RTM_NEWLINK, syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK)

	masterDevIfc, err := net.InterfaceByName(masterDev)
	if err != nil {
		return err
	}

	msg := newIfInfomsg(syscall.AF_UNSPEC)
	wb.AddData(msg)

	nest1 := newRtAttr(syscall.IFLA_LINKINFO, nil)
	newRtAttrChild(nest1, IFLA_INFO_KIND, nonZeroTerminated("vlan"))

	nest2 := newRtAttrChild(nest1, IFLA_INFO_DATA, nil)
	vlanData := make([]byte, 2)
	native.PutUint16(vlanData, vlanId)
	newRtAttrChild(nest2, IFLA_VLAN_ID, vlanData)
	wb.AddData(nest1)

	wb.AddData(uint32Attr(syscall.IFLA_LINK, uint32(masterDevIfc.Index)))
	wb.AddData(newRtAttr(syscall.IFLA_IFNAME, zeroTerminated(vlanDev)))

	if err := s.Send(wb); err != nil {
		return err
	}
	return s.HandleAck(wb.Seq)
}

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