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},

	Type int // interface type
	MTU  int // maximum transmission unit
}

// SysType implements the SysType method of Sys interface.
func (imx *InterfaceMetrics) SysType() SysType { return SysMetrics }

// Sys implements the Sys method of Message interface.
func (m *InterfaceMessage) Sys() []Sys {
	return []Sys{
		&InterfaceMetrics{
			Type: int(m.raw[24]),
			MTU:  int(nativeEndian.Uint32(m.raw[28:32])),
		},
	}

			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[:])
			}

	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

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++ {

	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 {
	X__icmp6_filt [8]uint32
}

const (
	SizeofSockaddrInet4    = 0x10
	SizeofSockaddrInet6    = 0x20
	SizeofSockaddrAny      = 0xfc

  "ipam": {
    "type": "host-local",
    "subnet": "10.1.0.0/16",
    "gateway": "10.1.0.1",
    "routes": [
      {
        "dst": "0.0.0.0/0"
      }
    ]
  },
  "isGateway": true,
  "mtu": 1460,
  "name": "rkt.kubernetes.io",
  "type": "bridge"

{
  "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",

	Type int // interface type
	MTU  int // maximum transmission unit
}

// SysType implements the SysType method of Sys interface.
func (imx *InterfaceMetrics) SysType() SysType { return SysMetrics }

// Sys implements the Sys method of Message interface.
func (m *InterfaceMessage) Sys() []Sys {
	return []Sys{
		&InterfaceMetrics{
			Type: int(m.raw[m.extOff]),