cidrs: []string{"10.20.30.0/24"},
			itfAddrsPairs: []InterfaceAddrsPair{
				{
					itf:   net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
					addrs: []net.Addr{&net.IPNet{IP: netutils.ParseIPSloppy("10.20.30.51"), Mask: net.CIDRMask(24, 32)}},
				},
				{
					itf:   net.Interface{Index: 2, MTU: 0, Name: "eth1", HardwareAddr: nil, Flags: 0},

			case windows.IF_TYPE_ATM:
				ifi.Flags |= FlagBroadcast | FlagPointToPoint | FlagMulticast // assume all services available; LANE, point-to-point and point-to-multipoint
			}
			if aa.Mtu == 0xffffffff {
				ifi.MTU = -1
			} else {
				ifi.MTU = int(aa.Mtu)
			}
			if aa.PhysicalAddressLength > 0 {
				ifi.HardwareAddr = make(HardwareAddr, aa.PhysicalAddressLength)
				copy(ifi.HardwareAddr, aa.PhysicalAddress[:])
			}

type Link struct {
	Name  string // name, equivalent to IP interface name
	Index int    // index, equivalent to IP interface index
	Type  int    // type
	Flags int    // flags
	MTU   int    // maximum transmission unit, basically link MTU but may differ between IP address families
	Addr  []byte // address
}

func (ll *Link) fetch(s uintptr) {
	var lifr lifreq
	for i := 0; i < len(ll.Name); i++ {

{
  "cniVersion": "0.3.1",
  "plugins": [
    {
      "type": "calico",
      "etcd_endpoints": "http://10.110.0.136:6666",
      "plugin_log_level": "info",
      "mtu": 1500,
      "ipam": {
        "type": "calico-ipam"
      },
      "policy": {
        "type": "k8s"
      },
      "kubernetes": {
        "kubeconfig": "/etc/cni/net.d/calico-kubeconfig"
      }
    },
    {
      "type": "portmap",

	if len(fields) < 4 {
		return nil, errors.New("invalid interface status file: " + ifcstat)
	}

	device := fields[1]
	mtustr := fields[3]

	mtu, _, ok := dtoi(mtustr)
	if !ok {
		return nil, errors.New("invalid status file of interface: " + ifcstat)
	}
	ifc.MTU = mtu

	// Not a loopback device ("/dev/null") or packet interface (e.g. "pkt2")
	if stringslite.HasPrefix(device, netdir+"/") {

{
  "name": "k8s-pod-network",
  "plugins": [
    {
      "type": "calico",
      "etcd_endpoints": "http://10.110.0.136:6666",
      "plugin_log_level": "info",
      "mtu": 1500,
      "ipam": {
        "type": "calico-ipam"
      },
      "policy": {
        "type": "k8s"
      },
      "kubernetes": {
        "kubeconfig": "/etc/cni/net.d/calico-kubeconfig"
      }
    },
    {
      "type": "portmap",

{
  "name": "k8s-pod-network",
  "cniVersion": "0.3.1",
  "pugins": [
    {
      "type": "calico",
      "etcd_endpoints": "http://10.110.0.136:6666",
      "plugin_log_level": "info",
      "mtu": 1500,
      "ipam": {
        "type": "calico-ipam"
      },
      "policy": {
        "type": "k8s"
      },
      "kubernetes": {
        "kubeconfig": "/etc/cni/net.d/calico-kubeconfig"
      }
    },
    {

    {
      "etcd_endpoints": "http://10.110.0.136:6666",
      "ipam": {
        "type": "calico-ipam"
      },
      "kubernetes": {
        "kubeconfig": "/etc/cni/net.d/calico-kubeconfig"
      },
      "mtu": 1500,
      "plugin_log_level": "info",
      "policy": {
        "type": "k8s"
      },
      "type": "calico"
    },
    {
      "capabilities": {
        "portMappings": true
      },

	Len   uint32
	Level int32
	Type  int32
}

type Inet6Pktinfo struct {
	Addr    [16]byte /* in6_addr */
	Ifindex uint32
}

type IPv6MTUInfo struct {
	Addr RawSockaddrInet6
	Mtu  uint32
}

type ICMPv6Filter struct {
	Filt [8]uint32
}

const (
	SizeofSockaddrInet4    = 0x10
	SizeofSockaddrInet6    = 0x1c
	SizeofSockaddrAny      = 0x6c
	SizeofSockaddrUnix     = 0x6a

	Len   uint32
	Level int32
	Type  int32
}

type Inet6Pktinfo struct {
	Addr    [16]byte /* in6_addr */
	Ifindex uint32
}

type IPv6MTUInfo struct {
	Addr RawSockaddrInet6
	Mtu  uint32
}

type ICMPv6Filter struct {
	Filt [8]uint32
}

const (
	SizeofSockaddrInet4    = 0x10
	SizeofSockaddrInet6    = 0x1c
	SizeofSockaddrAny      = 0x6c
	SizeofSockaddrUnix     = 0x6a