diff --git a/iface.nim b/iface.nim
new file mode 100644
index 000000000..bd9c659a0
--- /dev/null
+++ b/iface.nim
@@ -0,0 +1,1261 @@
+import chronos
+import algorithm
+from strutils import toHex
+
+const
+  MaxAdapterAddressLength* = 8
+
+type
+  InterfaceType* = enum
+    IfError = 0, # This is workaround element for ProoveInit warnings.
+    IfOther = 1,
+    IfRegular1822 = 2,
+    IfHdh1822 = 3,
+    IfDdnX25 = 4,
+    IfRfc877X25 = 5,
+    IfEthernetCsmacd = 6,
+    IfIso88023Csmacd = 7,
+    IfIso88024TokenBus = 8,
+    IfIso88025TokenRing = 9,
+    IfIso88026MAN = 10,
+    IfStarlan = 11,
+    IfProteon10Mbit = 12,
+    IfProteon80Mbit = 13,
+    IfHyperChannel = 14,
+    IfFddi = 15,
+    IfLapB = 16,
+    IfSdlc = 17,
+    IfDs1 = 18,
+    IfE1 = 19,
+    IfBasicIsdn = 20,
+    IfPrimaryIsdn = 21,
+    IfPropPoint2PointSerial = 22,
+    IfPpp = 23,
+    IfSoftwareLoopback = 24,
+    IfEon = 25,
+    IfEthernet3Mbit = 26,
+    IfNsip = 27,
+    IfSlip = 28,
+    IfUltra = 29,
+    IfDs3 = 30,
+    IfSip = 31,
+    IfFrameRelay = 32,
+    IfRs232 = 33,
+    IfPara = 34,
+    IfArcNet = 35,
+    IfArcNetPlus = 36,
+    IfAtm = 37,
+    IfMioX25 = 38,
+    IfSonet = 39,
+    IfX25Ple = 40,
+    IfIso88022Llc = 41,
+    IfLocalTalk = 42,
+    IfSmdsDxi = 43,
+    IfFrameRelayService = 44,
+    IfV35 = 45,
+    IfHssi = 46,
+    IfHippi = 47,
+    IfModem = 48,
+    IfAal5 = 49,
+    IfSonetPath = 50,
+    IfSonetVt = 51,
+    IfSmdsIcip = 52,
+    IfPropVirtual = 53,
+    IfPropMultiplexor = 54,
+    IfIeee80212 = 55,
+    IfFibreChannel = 56,
+    IfHippiInterface = 57,
+    IfFrameRelayInterconnect = 58,
+    IfAflane8023 = 59,
+    IfAflane8025 = 60,
+    IfCctemul = 61,
+    IfFastEther = 62,
+    IfIsdn = 63,
+    IfV11 = 64,
+    IfV36 = 65,
+    IfG70364K = 66,
+    IfG7032MB = 67,
+    IfQllc = 68,
+    IfFastEtherFx = 69,
+    IfChannel = 70,
+    IfIeee80211 = 71,
+    IfIbm370Parchan = 72,
+    IfEscon = 73,
+    IfDlsw = 74,
+    IfIsdnS = 75,
+    IfIsdnU = 76,
+    IfLapD = 77,
+    IfIpSwitch = 78,
+    IfRsrb = 79,
+    IfAtmLogical = 80,
+    IfDs0 = 81,
+    IfDs0Bundle = 82,
+    IfBsc = 83,
+    IfAsync = 84,
+    IfCnr = 85,
+    IfIso88025rDtr = 86,
+    IfEplrs = 87,
+    IfArap = 88,
+    IfPropCnls = 89,
+    IfHostPad = 90,
+    IfTermPad = 91,
+    IfFrameRelayMpi = 92,
+    IfX213 = 93,
+    IfAdsl = 94,
+    IfRadsl = 95,
+    IfSdsl = 96,
+    IfVdsl = 97,
+    IfIso88025Crfprint = 98,
+    IfMyrInet = 99,
+    IfVoiceEm = 100,
+    IfVoiceFxo = 101,
+    IfVoiceFxs = 102,
+    IfVoiceEncap = 103,
+    IfVoiceOverip = 104,
+    IfAtmDxi = 105,
+    IfAtmFuni = 106,
+    IfAtmIma = 107,
+    IfPppMultilinkBundle = 108,
+    IfIpoverCdlc = 109,
+    IfIpoverClaw = 110,
+    IfStackToStack = 111,
+    IfVirtualIpAddress = 112,
+    IfMpc = 113,
+    IfIpoverAtm = 114,
+    IfIso88025Fiber = 115,
+    IfTdlc = 116,
+    IfGigabitEthernet = 117,
+    IfHdlc = 118,
+    IfLapF = 119,
+    IfV37 = 120,
+    IfX25Mlp = 121,
+    IfX25HuntGroup = 122,
+    IfTransPhdlc = 123,
+    IfInterleave = 124,
+    IfFast = 125,
+    IfIp = 126,
+    IfDocScableMaclayer = 127,
+    IfDocScableDownstream = 128,
+    IfDocScableUpstream = 129,
+    IfA12MppSwitch = 130,
+    IfTunnel = 131,
+    IfCoffee = 132,
+    IfCes = 133,
+    IfAtmSubInterface = 134,
+    IfL2Vlan = 135,
+    IfL3IpVlan = 136,
+    IfL3IpxVlan = 137,
+    IfDigitalPowerline = 138,
+    IfMediaMailOverIp = 139,
+    IfDtm = 140,
+    IfDcn = 141,
+    IfIpForward = 142,
+    IfMsdsl = 143,
+    IfIeee1394 = 144,
+    IfIfGsn = 145,
+    IfDvbrccMaclayer = 146,
+    IfDvbrccDownstream = 147,
+    IfDvbrccUpstream = 148,
+    IfAtmVirtual = 149,
+    IfMplsTunnel = 150,
+    IfSrp = 151,
+    IfVoiceOverAtm = 152,
+    IfVoiceOverFrameRelay = 153,
+    IfIdsl = 154,
+    IfCompositeLink = 155,
+    IfSs7SigLink = 156,
+    IfPropWirelessP2p = 157,
+    IfFrForward = 158,
+    IfRfc1483 = 159,
+    IfUsb = 160,
+    IfIeee8023AdLag = 161,
+    IfBgpPolicyAccounting = 162,
+    IfFrf16MfrBundle = 163,
+    IfH323Gatekeeper = 164,
+    IfH323Proxy = 165,
+    IfMpls = 166,
+    IfMfSigLink = 167,
+    IfHdsl2 = 168,
+    IfShdsl = 169,
+    IfDs1Fdl = 170,
+    IfPos = 171,
+    IfDvbAsiIn = 172,
+    IfDvbAsiOut = 173,
+    IfPlc = 174,
+    IfNfas = 175,
+    IfTr008 = 176,
+    IfGr303Rdt = 177,
+    IfGr303Idt = 178,
+    IfIsup = 179,
+    IfPropDocsWirelessMaclayer = 180,
+    IfPropDocsWirelessDownstream = 181,
+    IfPropDocsWirelessUpstream = 182,
+    IfHiperLan2 = 183,
+    IfPropBwaP2mp = 184,
+    IfSonetOverheadChannel = 185,
+    IfDigitalWrapperOverheadChannel = 186,
+    IfAal2 = 187,
+    IfRadioMac = 188,
+    IfAtmRadio = 189,
+    IfImt = 190,
+    IfMvl = 191,
+    IfReachDsl = 192,
+    IfFrDlciEndpt = 193,
+    IfAtmVciEndpt = 194,
+    IfOpticalChannel = 195,
+    IfOpticalTransport = 196,
+    IfIeee80216Wman = 237,
+    IfWwanPp = 243,
+    IfWwanPp2 = 244,
+    IfIeee802154 = 259,
+    IfXboxWireless = 281
+
+  InterfaceState* = enum
+    StatusError = 0,  # This is workaround element for ProoveInit warnings.
+    StatusUp,
+    StatusDown,
+    StatusTesting,
+    StatusUnknown,
+    StatusDormant,
+    StatusNotPresent,
+    StatusLowerLayerDown
+
+  InterfaceAddress* = object
+    ifaddr*: TransportAddress
+    prefix*: int
+
+  NetworkInterface* = object
+    ifIndex*: int
+    ifType*: InterfaceType
+    name*: string
+    desc*: string
+    mtu*: int
+    flags*: uint64
+    state*: InterfaceState
+    mac*: array[MaxAdapterAddressLength, byte]
+    maclen*: int
+    addresses*: seq[InterfaceAddress]
+
+proc host*(ifa: InterfaceAddress): TransportAddress =
+  ## Return host address for ``ifa``.
+  result = ifa.ifaddr
+
+template setBroadcast(b, nby, nbi) =
+  if nbi == 0:
+    for i in nby..<len(b):
+      b[i] = 0xFF'u8
+  else:
+    let bcast = not cast[byte](0xFF'u8 shl (8 - nbi))
+    b[nby] = b[nby] or bcast
+    for i in (nby + 1)..<len(b):
+      b[i] = 0xFF'u8
+
+template setNetwork(b, nby, nbi) =
+  if nbi == 0:
+    for i in nby..<len(b):
+      b[i] = 0x00'u8
+  else:
+    let mask = cast[byte](0xFF'u8 shl (8 - nbi))
+    b[nby] = b[nby] and mask
+    for i in (nby + 1)..<len(b):
+      b[i] = 0x00'u8
+
+template setNetmask(b, nby, nbi) =
+  var mask: byte
+  for i in 0..<nby:
+    b[i] = 0xFF'u8
+  if nbi > 0:
+    mask = cast[byte](0xFF'u8 shl (8 - nbi))
+  if nby < len(b):
+    b[nby] = b[nby] or mask
+  for i in (nby + 1)..<len(b):
+    b[i] = 0x00'u8
+
+proc broadcast*(ifa: InterfaceAddress): TransportAddress =
+  ## Return broadcast address for ``ifa``.
+  let nbytes = ifa.prefix div 8
+  let nbits = ifa.prefix mod 8
+  result = ifa.ifaddr
+  if result.family == AddressFamily.IPv4:
+    setBroadcast(result.address_v4, nbytes, nbits)
+  elif result.family == AddressFamily.IPv6:
+    setBroadcast(result.address_v6, nbytes, nbits)
+
+proc network*(ifa: InterfaceAddress): TransportAddress =
+  ## Return network address for ``ifa``.
+  let nbytes = ifa.prefix div 8
+  let nbits = ifa.prefix mod 8
+  result = ifa.ifaddr
+  if result.family == AddressFamily.IPv4:
+    setNetwork(result.address_v4, nbytes, nbits)
+  elif result.family == AddressFamily.IPv6:
+    setNetwork(result.address_v6, nbytes, nbits)
+
+proc netmask*(ifa: InterfaceAddress): TransportAddress =
+  ## Return network mask for ``ifa``.
+  let nbytes = ifa.prefix div 8
+  let nbits = ifa.prefix mod 8
+  result = TransportAddress(family: ifa.ifaddr.family)
+  if result.family == AddressFamily.IPv4:
+    setNetmask(result.address_v4, nbytes, nbits)
+  elif result.family == AddressFamily.IPv6:
+    setNetmask(result.address_v6, nbytes, nbits)
+
+proc hostMin*(ifa: InterfaceAddress): TransportAddress =
+  ## Return minimum allowed host address for ``ifa``
+  result = ifa.network()
+  if result.family == AddressFamily.IPv4:
+    let last = len(result.address_v4) - 1
+    result.address_v4[last] = result.address_v4[last] + 1
+  elif result.family == AddressFamily.IPv6:
+    let last = len(result.address_v6) - 1
+    result.address_v6[last] = result.address_v6[last] + 1
+
+proc hostMax*(ifa: InterfaceAddress): TransportAddress =
+  ## Return maximum allowed host address for ``ifa``.
+  result = ifa.broadcast()
+  if result.family == AddressFamily.IPv4:
+    let last = len(result.address_v4) - 1
+    result.address_v4[last] = result.address_v4[last] - 1
+  elif result.family == AddressFamily.IPv6:
+    let last = len(result.address_v6) - 1
+    result.address_v6[last] = result.address_v6[last] - 1
+
+proc init*(ift: typedesc[InterfaceAddress], address: TransportAddress,
+           prefix: int): InterfaceAddress =
+  ## Initialize ``InterfaceAddress`` using ``address`` and prefix length
+  ## ``prefix``.
+  result.ifaddr = address
+  result.prefix = prefix
+
+proc `$`*(ifa: InterfaceAddress): string =
+  ## Return string representation of ``ifa``.
+  if ifa.ifaddr.family == AddressFamily.IPv4:
+    var a = IpAddress(
+      family: IpAddressFamily.IPv4,
+      address_v4: ifa.ifaddr.address_v4
+    )
+    result = $a
+    result.add("/")
+    result.add($int(ifa.prefix))
+  elif ifa.ifaddr.family == AddressFamily.IPv6:
+    var a = IpAddress(family: IpAddressFamily.IPv6,
+                      address_v6: ifa.ifaddr.address_v6)
+    result = $a
+    result.add("/")
+    result.add($int(ifa.prefix))
+
+proc `$`*(iface: NetworkInterface): string =
+  ## Return string representation of network interface ``iface``.
+  result = $iface.ifIndex
+  if len(result) == 1:
+    result.add(".  ")
+  else:
+    result.add(". ")
+  result.add(iface.name)
+  when defined(windows):
+    result.add(" [")
+    result.add(iface.desc)
+    result.add("]")
+  result.add(": flags = ")
+  result.add($iface.flags)
+  result.add(" mtu ")
+  result.add($iface.mtu)
+  result.add(" state ")
+  result.add($iface.state)
+  result.add("\n    ")
+  result.add($iface.ifType)
+  result.add(" ")
+  if iface.maclen > 0:
+    for i in 0..<iface.maclen:
+      result.add(toHex(iface.mac[i]))
+      if i < iface.maclen - 1:
+        result.add(":")
+  for item in iface.addresses:
+    result.add("\n    ")
+    if item.ifaddr.family == AddressFamily.IPv4:
+      result.add("inet ")
+    elif item.ifaddr.family == AddressFamily.IPv6:
+      result.add("inet6 ")
+    result.add($item)
+    result.add(" netmask ")
+    result.add($(item.netmask().address()))
+    result.add(" brd ")
+    result.add($(item.broadcast().address()))
+
+proc cmp*(a, b: NetworkInterface): int =
+  result = cmp(a.ifIndex, b.ifIndex)
+
+when defined(linux):
+  import posix
+
+  const
+    AF_NETLINK = cint(16)
+    AF_PACKET = cint(17)
+    NETLINK_ROUTE = cint(0)
+    NLMSG_ALIGNTO = 4'u
+    RTA_ALIGNTO = 4'u
+    RTM_GETLINK = 18
+    RTM_GETADDR = 22
+    NLM_F_REQUEST = 1
+    NLM_F_ROOT = 0x100
+    NLM_F_MATCH = 0x200
+    NLM_F_DUMP = NLM_F_ROOT or NLM_F_MATCH
+    IFLIST_REPLY_BUFFER = 8192
+    InvalidSocketHandle = SocketHandle(-1)
+    NLMSG_DONE = 0x03
+    NLMSG_MIN_TYPE = 0x10
+    NLMSG_ERROR = 0x02
+
+    IFLA_ADDRESS = 1
+    IFLA_IFNAME = 3
+    IFLA_MTU = 4
+    IFLA_OPERSTATE = 16
+
+    IFA_ADDRESS = 1
+    IFA_LOCAL = 2
+    IFA_BROADCAST = 4
+
+    # ARPHRD_NETROM = 0
+    ARPHRD_ETHER = 1
+    ARPHRD_EETHER = 2
+    # ARPHRD_AX25 = 3
+    # ARPHRD_PRONET = 4
+    # ARPHRD_CHAOS = 5
+    # ARPHRD_IEEE802 = 6
+    ARPHRD_ARCNET = 7
+    # ARPHRD_APPLETLK = 8
+    # ARPHRD_DLCI = 15
+    ARPHRD_ATM = 19
+    # ARPHRD_METRICOM = 23
+    ARPHRD_IEEE1394 = 24
+    # ARPHRD_EUI64 = 27
+    # ARPHRD_INFINIBAND = 32
+    ARPHRD_SLIP = 256
+    ARPHRD_CSLIP = 257
+    ARPHRD_SLIP6 = 258
+    ARPHRD_CSLIP6 = 259
+    # ARPHRD_RSRVD = 260
+    # ARPHRD_ADAPT = 264
+    # ARPHRD_ROSE = 270
+    # ARPHRD_X25 = 271
+    # ARPHRD_HWX25 = 272
+    # ARPHRD_CAN = 280
+    ARPHRD_PPP = 512
+    ARPHRD_CISCO = 513
+    ARPHRD_HDLC = ARPHRD_CISCO
+    ARPHRD_LAPB = 516
+    # ARPHRD_DDCMP = 517
+    # ARPHRD_RAWHDLC = 518
+    # ARPHRD_TUNNEL = 768
+    # ARPHRD_TUNNEL6 = 769
+    ARPHRD_FRAD = 770
+    # ARPHRD_SKIP = 771
+    ARPHRD_LOOPBACK = 772
+    # ARPHRD_LOCALTLK = 773
+    # ARPHRD_FDDI = 774
+    # ARPHRD_BIF = 775
+    # ARPHRD_SIT = 776
+    # ARPHRD_IPDDP = 777
+    # ARPHRD_IPGRE = 778
+    # ARPHRD_PIMREG = 779
+    ARPHRD_HIPPI = 780
+    # ARPHRD_ASH = 781
+    # ARPHRD_ECONET = 782
+    # ARPHRD_IRDA = 783
+    # ARPHRD_FCPP = 784
+    # ARPHRD_FCAL = 785
+    # ARPHRD_FCPL = 786
+    # ARPHRD_FCFABRIC = 787
+    # ARPHRD_IEEE802_TR = 800
+    ARPHRD_IEEE80211 = 801
+    ARPHRD_IEEE80211_PRISM = 802
+    ARPHRD_IEEE80211_RADIOTAP = 803
+    # ARPHRD_IEEE802154 = 804
+    # ARPHRD_IEEE802154_MONITOR = 805
+    # ARPHRD_PHONET = 820
+    # ARPHRD_PHONET_PIPE = 821
+    # ARPHRD_CAIF = 822
+    # ARPHRD_IP6GRE = 823
+    # ARPHRD_NETLINK = 824
+    # ARPHRD_6LOWPAN = 825
+    # ARPHRD_VOID = 0xFFFF
+    # ARPHRD_NONE = 0xFFFE
+
+  type
+    SockAddr_nl = object
+      family: cushort
+      pad: cushort
+      pid: uint32
+      groups: uint32
+
+    NlMsgHeader = object
+      nlmsg_len: uint32
+      nlmsg_type: uint16
+      nlmsg_flags: uint16
+      nlmsg_seq: uint32
+      nlmsg_pid: uint32
+
+    IfInfoMessage = object
+      ifi_family: cuchar
+      ifi_pad: cuchar
+      ifi_type: cushort
+      ifi_index: cint
+      ifi_flags: cuint
+      ifi_change: cuint
+
+    IfAddrMessage = object
+      ifa_family: cuchar
+      ifa_prefixlen: cuchar
+      ifa_flags: cuchar
+      ifa_scope: cuchar
+      ifa_index: uint32
+
+    RtAttr = object
+      rta_len: cushort
+      rta_type: cushort
+
+    RtGenMsg = object
+      rtgen_family: byte
+
+    NLReq = object
+      hdr: NlMsgHeader
+      msg: RtGenMsg
+
+  template NLMSG_ALIGN(length: uint): uint =
+    (length + NLMSG_ALIGNTO - 1) and not(NLMSG_ALIGNTO - 1)
+
+  template NLMSG_HDRLEN(): int =
+    int(NLMSG_ALIGN(uint(sizeof(NlMsgHeader))))
+
+  template NLMSG_LENGTH(length: int): uint32 =
+    uint32(NLMSG_HDRLEN() + length)
+
+  proc NLMSG_OK(nlh: ptr NlMsgHeader, length: int): bool {.inline.} =
+    result = (length >= int(sizeof(NlMsgHeader))) and
+             (nlh.nlmsg_len >= uint32(sizeof(NlMsgHeader))) and
+             (nlh.nlmsg_len <= uint32(length))
+
+  proc NLMSG_NEXT(nlh: ptr NlMsgHeader,
+                  length: var int): ptr NlMsgHeader {.inline.} =
+    length = length - int(NLMSG_ALIGN(uint(nlh.nlmsg_len)))
+    result = cast[ptr NlMsgHeader](cast[uint](nlh) +
+                                   cast[uint](NLMSG_ALIGN(uint(nlh.nlmsg_len))))
+
+  proc NLMSG_DATA(nlh: ptr NlMsgHeader): ptr byte {.inline.} =
+    result = cast[ptr byte](cast[uint](nlh) + NLMSG_LENGTH(0))
+
+
+  template RTA_HDRLEN(): int =
+    int(RTA_ALIGN(uint(sizeof(RtAttr))))
+
+  template RTA_LENGTH(length: int): uint =
+    uint(RTA_HDRLEN()) + uint(length)
+
+  template RTA_ALIGN*(length: uint): uint =
+    (length + RTA_ALIGNTO - 1) and not(RTA_ALIGNTO - 1)
+
+  template RTA_PAYLOAD*(length: uint): uint =
+    length - RTA_LENGTH(0)
+
+  proc IFLA_RTA(r: ptr byte): ptr RtAttr {.inline.} =
+    cast[ptr RtAttr](cast[uint](r) + NLMSG_ALIGN(uint(sizeof(IfInfoMessage))))
+
+  proc IFA_RTA(r: ptr byte): ptr RtAttr {.inline.} =
+    cast[ptr RtAttr](cast[uint](r) + NLMSG_ALIGN(uint(sizeof(IfAddrMessage))))
+
+  proc RTA_OK(rta: ptr RtAttr, length: int): bool {.inline.} =
+    result = length >= sizeof(RtAttr) and
+             rta.rta_len >= cushort(sizeof(RtAttr)) and
+             rta.rta_len <= cushort(length)
+
+  proc RTA_NEXT(rta: ptr RtAttr, length: var int): ptr RtAttr {.inline.} =
+    length = length - int(RTA_ALIGN(uint(rta.rta_len)))
+    result = cast[ptr RtAttr](cast[uint](rta) +
+                              cast[uint](RTA_ALIGN(uint(rta.rta_len))))
+
+  proc RTA_DATA(rta: ptr RtAttr): ptr byte {.inline.} =
+    result = cast[ptr byte](cast[uint](rta) + RTA_LENGTH(0))
+
+  proc toInterfaceState(it: cint, flags: cuint): InterfaceState  {.inline.} =
+    case it
+    of 1:
+      result = StatusNotPresent
+    of 2:
+      result = StatusDown
+    of 3:
+      result = StatusLowerLayerDown
+    of 4:
+      result = StatusTesting
+    of 5:
+      result = StatusDormant
+    of 6:
+      result = StatusUp
+    else:
+      result = StatusUnknown
+
+  proc toInterfaceType(ft: uint32): InterfaceType {.inline.} =
+    case ft
+    of ARPHRD_ETHER, ARPHRD_EETHER:
+      result = IfEthernetCsmacd
+    of ARPHRD_LOOPBACK:
+      result = IfSoftwareLoopback
+    of 787..799:
+      result = IfFibreChannel
+    of ARPHRD_PPP:
+      result = IfPpp
+    of ARPHRD_SLIP, ARPHRD_CSLIP, ARPHRD_SLIP6, ARPHRD_CSLIP6:
+      result = IfSlip
+    of ARPHRD_IEEE1394:
+      result = IfIeee1394
+    of ARPHRD_IEEE80211, ARPHRD_IEEE80211_PRISM, ARPHRD_IEEE80211_RADIOTAP:
+      result = IfIeee80211
+    of ARPHRD_ATM:
+      result = IfAtm
+    of ARPHRD_HDLC:
+      result = IfHdlc
+    of ARPHRD_HIPPI:
+      result = IfHippiInterface
+    of ARPHRD_ARCNET:
+      result = IfArcNet
+    of ARPHRD_LAPB:
+      result = IfLapB
+    of ARPHRD_FRAD:
+      result = IfFrameRelay
+    else:
+      result = IfOther
+
+  proc createNetlinkSocket(pid: Pid): SocketHandle =
+    var address: SockAddr_nl
+    address.family = cushort(AF_NETLINK)
+    address.groups = 0
+    address.pid = cast[uint32](pid)
+    result = posix.socket(AF_NETLINK, posix.SOCK_DGRAM, NETLINK_ROUTE)
+    if result != SocketHandle(-1):
+      if posix.bindSocket(result, cast[ptr SockAddr](addr address),
+                          Socklen(sizeof(SockAddr_nl))) != 0:
+        discard posix.close(result)
+        result = SocketHandle(-1)
+
+  proc sendNetlinkMessage(fd: SocketHandle, pid: Pid, seqno: uint32,
+                          ntype: uint16, nflags: uint16): bool =
+    var
+      rmsg: Tmsghdr
+      iov: IOVec
+      req: NLReq
+      address: SockAddr_nl
+    address.family = cushort(AF_NETLINK)
+    req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(RtGenMsg))
+    req.hdr.nlmsg_type = ntype
+    req.hdr.nlmsg_flags = nflags
+    req.hdr.nlmsg_seq = seqno
+    req.hdr.nlmsg_pid = cast[uint32](pid)
+    req.msg.rtgen_family = byte(AF_PACKET)
+    iov.iov_base = cast[pointer](addr req)
+    iov.iov_len = cast[csize](req.hdr.nlmsg_len)
+    rmsg.msg_iov = addr iov
+    rmsg.msg_iovlen = 1
+    rmsg.msg_name = cast[pointer](addr address)
+    rmsg.msg_namelen = Socklen(sizeof(SockAddr_nl))
+    let res = posix.sendmsg(fd, addr rmsg, 0)
+    if res == iov.iov_len:
+      result = true
+
+  proc readNetlinkMessage(fd: SocketHandle, data: var seq[byte]): bool =
+    var
+      rmsg: Tmsghdr
+      iov: IOVec
+      address: SockAddr_nl
+    data.setLen(IFLIST_REPLY_BUFFER)
+    iov.iov_base = cast[pointer](addr data[0])
+    iov.iov_len = IFLIST_REPLY_BUFFER
+    rmsg.msg_iov = addr iov
+    rmsg.msg_iovlen = 1
+    rmsg.msg_name = cast[pointer](addr address)
+    rmsg.msg_namelen = SockLen(sizeof(SockAddr_nl))
+    var length = posix.recvmsg(fd, addr rmsg, 0)
+    if length >= 0:
+      data.setLen(length)
+      result = true
+    else:
+      data.setLen(0)
+
+  proc processLink(msg: ptr NlMsgHeader): NetworkInterface =
+    var iface: ptr IfInfoMessage
+    var attr: ptr RtAttr
+    var length: int
+
+    iface = cast[ptr IfInfoMessage](NLMSG_DATA(msg))
+    length = int(msg.nlmsg_len) - int(NLMSG_LENGTH(sizeof(IfInfoMessage)))
+
+    attr = IFLA_RTA(cast[ptr byte](iface))
+    result.ifType = toInterfaceType(iface.ifi_type)
+    result.ifIndex = iface.ifi_index
+    result.flags = cast[uint64](iface.ifi_flags)
+
+    while RTA_OK(attr, length):
+      if attr.rta_type == IFLA_IFNAME:
+        var p = cast[cstring](RTA_DATA(attr))
+        result.name = $p
+      elif attr.rta_type == IFLA_ADDRESS:
+        var p = cast[ptr byte](RTA_DATA(attr))
+        var plen = min(int(RTA_PAYLOAD(uint(attr.rta_len))), len(result.mac))
+        copyMem(addr result.mac[0], p, plen)
+        result.maclen = plen
+      elif attr.rta_type == IFLA_MTU:
+        var p = cast[ptr uint32](RTA_DATA(attr))
+        result.mtu = cast[int](p[])
+      elif attr.rta_type == IFLA_OPERSTATE:
+        var p = cast[ptr byte](RTA_DATA(attr))
+        result.state = toInterfaceState(cast[cint](p[]), iface.ifi_flags)
+      attr = RTA_NEXT(attr, length)
+
+  proc getAddress(f: int, p: pointer): TransportAddress {.inline.} =
+    if f == posix.AF_INET:
+      result = TransportAddress(family: AddressFamily.IPv4)
+      copyMem(addr result.address_v4[0], p, len(result.address_v4))
+    elif f == posix.AF_INET6:
+      result = TransportAddress(family: AddressFamily.IPv6)
+      copyMem(addr result.address_v6[0], p, len(result.address_v6))
+
+  proc processAddress(msg: ptr NlMsgHeader): NetworkInterface =
+    var iaddr: ptr IfAddrMessage
+    var attr: ptr RtAttr
+    var length: int
+
+    iaddr = cast[ptr IfAddrMessage](NLMSG_DATA(msg))
+    length = int(msg.nlmsg_len) - int(NLMSG_LENGTH(sizeof(IfAddrMessage)))
+
+    attr = IFA_RTA(cast[ptr byte](iaddr))
+
+    let family = cast[int](iaddr.ifa_family)
+    result.ifIndex = cast[int](iaddr.ifa_index)
+
+    var address, local: TransportAddress
+
+    while RTA_OK(attr, length):
+      if attr.rta_type == IFA_LOCAL:
+        local = getAddress(family, cast[pointer](RTA_DATA(attr)))
+      elif attr.rta_type == IFA_ADDRESS:
+        address = getAddress(family, cast[pointer](RTA_DATA(attr)))
+      attr = RTA_NEXT(attr, length)
+
+    if local.family != AddressFamily.None:
+      address = local
+    if len(result.addresses) == 0:
+      result.addresses = newSeq[InterfaceAddress]()
+    let prefixLength = cast[int](iaddr.ifa_prefixlen)
+    result.addresses.add(InterfaceAddress(ifaddr: address,
+                                          prefix: prefixLength))
+
+  proc getLinks(netfd: SocketHandle, pid: Pid): seq[NetworkInterface] =
+    if not sendNetlinkMessage(netfd, pid, 1, RTM_GETLINK,
+                              NLM_F_REQUEST or NLM_F_DUMP):
+      return
+    var data = newSeq[byte]()
+    result = newSeq[NetworkInterface]()
+    while true:
+      if not readNetlinkMessage(netfd, data):
+        break
+      var length = len(data)
+      if length == 0:
+        break
+      var msg = cast[ptr NlMsgHeader](addr data[0])
+      var endflag = false
+      while NLMSG_OK(msg, length):
+        if msg.nlmsg_type == NLMSG_DONE:
+          endflag = true
+          break
+        elif msg.nlmsg_type == NLMSG_ERROR:
+          endflag = true
+          break
+        else:
+          var iface = processLink(msg)
+          result.add(iface)
+        msg = NLMSG_NEXT(msg, length)
+      if endflag == true:
+        break
+
+  proc getAddresses(netfd: SocketHandle, pid: Pid,
+                    ifaces: var seq[NetworkInterface]) =
+    if not sendNetlinkMessage(netfd, pid, 2, RTM_GETADDR,
+                              NLM_F_REQUEST or NLM_F_DUMP):
+      return
+    var data = newSeq[byte]()
+    while true:
+      if not readNetlinkMessage(netfd, data):
+        break
+      var length = len(data)
+      if length == 0:
+        break
+      var msg = cast[ptr NlMsgHeader](addr data[0])
+      var endflag = false
+      while NLMSG_OK(msg, length):
+        if msg.nlmsg_type == NLMSG_DONE:
+          endflag = true
+          break
+        elif msg.nlmsg_type == NLMSG_ERROR:
+          endflag = true
+          break
+        else:
+          var iface = processAddress(msg)
+          for i in 0..<len(ifaces):
+            if ifaces[i].ifIndex == iface.ifIndex:
+              for item in iface.addresses:
+                ifaces[i].addresses.add(item)
+        msg = NLMSG_NEXT(msg, length)
+      if endflag == true:
+        break
+
+  proc getInterfaces*(): seq[NetworkInterface] =
+    ## Return list of available interfaces.
+    var pid = posix.getpid()
+    var sock = createNetlinkSocket(pid)
+    if sock == InvalidSocketHandle:
+      return
+    result = getLinks(sock, pid)
+    getAddresses(sock, pid, result)
+    sort(result, cmp)
+    discard posix.close(sock)
+
+elif defined(macosx) or defined(bsd):
+  import posix
+
+  const
+    AF_LINK = 18
+    IFF_UP = 0x01
+    IFF_POINTOPOINT = 0x10
+    IFF_RUNNING = 0x40
+
+  type
+    IfAddrs {.importc: "struct ifaddrs", header: "<ifaddrs.h>",
+              pure, final.} = object
+      ifa_next {.importc: "ifa_next".}: ptr IfAddrs
+      ifa_name {.importc: "ifa_name".}: ptr cchar
+      ifa_flags {.importc: "ifa_flags".}: cuint
+      ifa_addr {.importc: "ifa_addr".}: ptr SockAddr
+      ifa_netmask {.importc: "ifa_netmask".}: ptr SockAddr
+      ifa_dstaddr {.importc: "ifa_dstaddr".}: ptr SockAddr
+      ifa_data {.importc: "ifa_data".}: pointer
+
+    PIfAddrs = ptr IfAddrs
+
+    IfData {.importc: "struct if_data", header: "<net/if.h>",
+             pure, final.} = object
+      ifi_type {.importc: "ifi_type".}: byte
+      ifi_typelen {.importc: "ifi_typelen".}: byte
+      ifi_physical {.importc: "ifi_physical".}: byte
+      ifi_addrlen {.importc: "ifi_addrlen".}: byte
+      ifi_hdrlen {.importc: "ifi_hdrlen".}: byte
+      ifi_recvquota {.importc: "ifi_recvquota".}: byte
+      ifi_xmitquota {.importc: "ifi_xmitquota".}: byte
+      ifi_unused1 {.importc: "ifi_unused1".}: byte
+      ifi_mtu {.importc: "ifi_mtu".}: uint32
+      ifi_metric {.importc: "ifi_metric".}: uint32
+      ifi_baudrate {.importc: "ifi_baudrate".}: uint32
+      ifi_ipackets {.importc: "ifi_ipackets".}: uint32
+      ifi_ierrors {.importc: "ifi_ierrors".}: uint32
+      ifi_opackets {.importc: "ifi_opackets".}: uint32
+      ifi_oerrors {.importc: "ifi_oerrors".}: uint32
+      ifi_collisions {.importc: "ifi_collisions".}: uint32
+      ifi_ibytes {.importc: "ifi_ibytes".}: uint32
+      ifi_obytes {.importc: "ifi_obytes".}: uint32
+      ifi_imcasts {.importc: "ifi_imcasts".}: uint32
+      ifi_omcasts {.importc: "ifi_omcasts".}: uint32
+      ifi_iqdrops {.importc: "ifi_iqdrops".}: uint32
+      ifi_noproto {.importc: "ifi_noproto".}: uint32
+      ifi_recvtiming {.importc: "ifi_recvtiming".}: uint32
+      ifi_xmittiming {.importc: "ifi_xmittiming".}: uint32
+      ifi_lastchange {.importc: "ifi_lastchange".}: Timeval
+      ifi_unused2 {.importc: "ifi_unused2".}: uint32
+      ifi_hwassist {.importc: "ifi_hwassist".}: uint32
+      ifi_reserved1 {.importc: "ifi_reserved1".}: uint32
+      ifi_reserved2 {.importc: "ifi_reserved2".}: uint32
+
+    SockAddr_dl = object
+      sdl_len: byte
+      sdl_family: byte
+      sdl_index: uint16
+      sdl_type: byte
+      sdl_nlen: byte
+      sdl_alen: byte
+      sdl_slen: byte
+      sdl_data: array[12, byte]
+
+  proc getIfAddrs(ifap: ptr PIfAddrs): cint {.importc: "getifaddrs",
+       header: """#include <sys/types.h>
+                  #include <sys/socket.h>
+                  #include <ifaddrs.h>""".}
+  proc freeIfAddrs(ifap: ptr IfAddrs) {.importc: "freeifaddrs",
+       header: """#include <sys/types.h>
+                  #include <sys/socket.h>
+                  #include <ifaddrs.h>""".}
+
+  proc toInterfaceType(f: byte): InterfaceType {.inline.} =
+    var ft = cast[int](f)
+    if (ft >= 1 and ft <= 196) or (ft == 237) or (ft == 243) or (ft == 244):
+      result = cast[InterfaceType](ft)
+    else:
+      result = IfOther
+
+  proc toInterfaceState(f: cuint): InterfaceState {.inline.} =
+    if (f and IFF_RUNNING) != 0 and (f and IFF_UP) != 0:
+      result = StatusUp
+    else:
+      result = StatusDown
+
+  proc netmaskToPrefix(address: TransportAddress): int =
+    var lastbyte: byte
+    if address.family == AddressFamily.IPv4:
+      for i in 0..<len(address.address_v4):
+        if address.address_v4[i] == 0xFF'u8:
+          result += 8
+        else:
+          lastbyte = address.address_v4[i]
+          break
+    elif address.family == AddressFamily.IPv6:
+      for i in 0..<len(address.address_v6):
+        if address.address_v6[i] == 0xFF'u8:
+          result += 8
+        else:
+          lastbyte = address.address_v6[i]
+          break
+    while lastbyte > 0'u8:
+      lastbyte = lastbyte shl 1
+      result += 1
+
+  proc getInterfaces*(): seq[NetworkInterface] =
+    ## Return list of available interfaces.
+    var ifap: ptr IfAddrs
+    let res = getIfAddrs(addr ifap)
+    if res == 0:
+      result = newSeq[NetworkInterface]()
+      while not isNil(ifap):
+        var iface: NetworkInterface
+        var ifaddress: InterfaceAddress
+
+        iface.name = $ifap.ifa_name
+        iface.flags = cast[uint64](ifap.ifa_flags)
+        var i = 0
+        while i < len(result):
+          if result[i].name == iface.name:
+            break
+          inc(i)
+        if i == len(result):
+          result.add(iface)
+
+        if not isNil(ifap.ifa_addr):
+          let family = cast[int](ifap.ifa_addr.sa_family)
+          if family == AF_LINK:
+            var data = cast[ptr IfData](ifap.ifa_data)
+            var link = cast[ptr SockAddr_dl](ifap.ifa_addr)
+            result[i].ifIndex = cast[int](link.sdl_index)
+            let nlen = cast[int](link.sdl_nlen)
+            if nlen < len(link.sdl_data):
+              let minsize = min(cast[int](link.sdl_alen), len(result[i].mac))
+              copyMem(addr result[i].mac[0], addr link.sdl_data[nlen], minsize)
+            result[i].maclen = cast[int](link.sdl_alen)
+            result[i].ifType = toInterfaceType(data.ifi_type)
+            result[i].state = toInterfaceState(ifap.ifa_flags)
+            result[i].mtu = cast[int](data.ifi_mtu)
+          elif family == posix.AF_INET:
+            fromSAddr(cast[ptr Sockaddr_storage](ifap.ifa_addr),
+                      Socklen(sizeof(SockAddr_in)), ifaddress.ifaddr)
+          elif family == posix.AF_INET6:
+            fromSAddr(cast[ptr Sockaddr_storage](ifap.ifa_addr),
+                      Socklen(sizeof(SockAddr_in6)), ifaddress.ifaddr)
+        if not isNil(ifap.ifa_netmask):
+          var na: TransportAddress
+          var slen: Socklen
+          var family = cast[cint](ifap.ifa_netmask.sa_family)
+          if family == posix.AF_INET:
+            fromSAddr(cast[ptr Sockaddr_storage](ifap.ifa_netmask),
+                      Socklen(sizeof(SockAddr_in)), na)
+          elif family == posix.AF_INET6:
+            fromSAddr(cast[ptr Sockaddr_storage](ifap.ifa_netmask),
+                      Socklen(sizeof(SockAddr_in6)), na)
+          ifaddress.prefix = netmaskToPrefix(na)
+
+        if ifaddress.ifaddr.family != AddressFamily.None:
+          if len(result[i].addresses) == 0:
+            result[i].addresses = newSeq[InterfaceAddress]()
+          result[i].addresses.add(ifaddress)
+        ifap = ifap.ifa_next
+
+      sort(result, cmp)
+      freeIfAddrs(ifap)
+
+elif defined(windows):
+  import winlean
+
+  const
+    IfOperStatusUp = cint(1)
+    IfOperStatusDown = cint(2)
+    IfOperStatusTesting = cint(3)
+    IfOperStatusUnknown = cint(4)
+    IfOperStatusDormant = cint(5)
+    IfOperStatusNotPresent = cint(6)
+    IfOperStatusLowerLayerDown = cint(7)
+
+    IpPrefixOriginOther = cint(0)
+    IpPrefixOriginManual = cint(1)
+    IpPrefixOriginWellKnown = cint(2)
+    IpPrefixOriginDhcp = cint(3)
+    IpPrefixOriginRouterAdvertisement = cint(4)
+    IpPrefixOriginUnchanged = cint(1) shl 4
+
+    IpSuffixOriginOther = cint(0)
+    IpSuffixOriginManual = cint(1)
+    IpSuffixOriginWellKnown = cint(2)
+    IpSuffixOriginDhcp = cint(3)
+    IpSuffixOriginLinkLayerAddress = cint(4)
+    IpSuffixOriginRandom = cint(5)
+    IpSuffixOriginUnchanged = cint(1) shl 4
+
+    IpDadStateInvalid = cint(0)
+    IpDadStateTentative = cint(1)
+    IpDadStateDuplicate = cint(2)
+    IpDadStateDeprecated = cint(3)
+    IpDadStatePreferred = cint(4)
+
+    WorkBufferSize = 16384'u32
+    MaxTries = 3
+
+    AF_UNSPEC = 0x00'u32
+
+    GAA_FLAG_INCLUDE_PREFIX = 0x0010'u32
+
+    CP_UTF8 = 65001'u32
+
+    ERROR_BUFFER_OVERFLOW* = 111'u32
+    ERROR_SUCCESS* = 0'u32
+
+  type
+    WCHAR = distinct uint16
+
+    SocketAddress = object
+      lpSockaddr: ptr SockAddr
+      iSockaddrLength: cint
+
+    IpAdapterUnicastAddressXpLh = object
+      length: uint32
+      flags: uint32
+      next: ptr IpAdapterUnicastAddressXpLh
+      address: SocketAddress
+      prefixOrigin: cint
+      suffixOrigin: cint
+      dadState: cint
+      validLifetime: uint32
+      preferredLifetime: uint32
+      leaseLifetime: uint32
+      onLinkPrefixLength: byte # This field is available only from Vista
+
+    IpAdapterAnycastAddressXp = object
+      length: uint32
+      flags: uint32
+      next: ptr IpAdapterAnycastAddressXp
+      address: SocketAddress
+
+    IpAdapterMulticastAddressXp = object
+      length: uint32
+      flags: uint32
+      next: ptr IpAdapterMulticastAddressXp
+      address: SocketAddress
+
+    IpAdapterDnsServerAddressXp = object
+      length: uint32
+      flags: uint32
+      next: ptr IpAdapterDnsServerAddressXp
+      address: SocketAddress
+
+    IpAdapterPrefixXp = object
+      length: uint32
+      flags: uint32
+      next: ptr IpAdapterPrefixXp
+      address: SocketAddress
+      prefixLength: uint32
+
+    IpAdapterAddressesXp = object
+      length: uint32
+      ifIndex: uint32
+      next: ptr IpAdapterAddressesXp
+      adapterName: cstring
+      unicastAddress: ptr IpAdapterUnicastAddressXpLh
+      anycastAddress: ptr IpAdapterAnycastAddressXp
+      multicastAddress: ptr IpAdapterMulticastAddressXp
+      dnsServerAddress: ptr IpAdapterDnsServerAddressXp
+      dnsSuffix: ptr WCHAR
+      description: ptr WCHAR
+      friendlyName: ptr WCHAR
+      physicalAddress: array[MaxAdapterAddressLength, byte]
+      physicalAddressLength: uint32
+      flags: uint32
+      mtu: uint32
+      ifType: uint32
+      operStatus: cint
+      ipv6IfIndex: uint32
+      zoneIndices: array[16, uint32]
+      firstPrefix: ptr IpAdapterPrefixXp
+
+  proc toInterfaceType(ft: uint32): InterfaceType {.inline.} =
+    if (ft >= 1'u32 and ft <= 196'u32) or
+       (ft == 237) or (ft == 243) or (ft == 244) or (ft == 259) or (ft == 281):
+      result = cast[InterfaceType](ft)
+    else:
+      result = IfOther
+
+  proc toInterfaceState(it: cint): InterfaceState  {.inline.} =
+    if it >= 1 and it <= 7:
+      result = cast[InterfaceState](it)
+    else:
+      result = StatusUnknown
+
+  proc GetAdaptersAddresses(family: uint32, flags: uint32, reserved: pointer,
+                            addresses: ptr IpAdapterAddressesXp,
+                            sizeptr: ptr uint32): uint32 {.
+       stdcall, dynlib: "iphlpapi", importc: "GetAdaptersAddresses".}
+
+  proc WideCharToMultiByte(CodePage: uint32, dwFlags: uint32,
+                           lpWideCharStr: ptr WCHAR, cchWideChar: cint,
+                           lpMultiByteStr: ptr char, cbMultiByte: cint,
+                           lpDefaultChar: ptr char,
+                           lpUsedDefaultChar: ptr uint32): cint
+       {.stdcall, dynlib: "kernel32.dll", importc: "WideCharToMultiByte".}
+
+  proc `$`(bstr: ptr WCHAR): string =
+    var buffer: char
+    var count = WideCharToMultiByte(CP_UTF8, 0, bstr, -1, addr(buffer), 0,
+                                    nil, nil)
+    if count > 0:
+      result = newString(count + 8)
+      let res = WideCharToMultiByte(CP_UTF8, 0, bstr, -1, addr(result[0]),
+                                    count, nil, nil)
+      if res > 0:
+        result.setLen(res - 1)
+      else:
+        result.setLen(0)
+
+  proc isVista(): bool =
+    var ver: OSVERSIONINFO
+    ver.dwOSVersionInfoSize = DWORD(sizeof(ver))
+    let res = getVersionExW(addr(ver))
+    if res == 0:
+      result = false
+    else:
+      result = (ver.dwMajorVersion >= 6)
+
+  proc toIPv6(a: TransportAddress): TransportAddress =
+    ## IPv4-mapped addresses are formed by:
+    ## <80 bits of zeros> + <16 bits of ones> + <32-bit IPv4 address>.
+    if a.family == AddressFamily.IPv4:
+      result = TransportAddress(family: AddressFamily.IPv6)
+      result.address_v6[10] = 0xFF'u8
+      result.address_v6[11] = 0xFF'u8
+      copyMem(addr result.address_v6[12], unsafeAddr a.address_v4[0], 4)
+    elif a.family == AddressFamily.IPv6:
+      result = a
+
+  proc ipMatchPrefix(number, prefix: TransportAddress, nbits: int): bool =
+    var num6, prefix6: TransportAddress
+    if number.family == AddressFamily.IPv4:
+      num6 = toIPv6(number)
+    else:
+      num6 = number
+    if prefix.family == AddressFamily.IPv4:
+      prefix6 = toIPv6(number)
+    else:
+      prefix6 = prefix
+    var bytesCount = nbits div 8
+    var bitsCount = nbits mod 8
+    for i in 0..<bytesCount:
+      if num6.address_v6[i] != prefix6.address_v6[i]:
+        return false
+    if bitsCount != 0:
+      var mask = cast[byte](0xFF'u8 shl (8 - bitsCount))
+      let i = bytesCount
+      if (num6.address_v6[i] and mask) != (prefix6.address_v6[i] and mask):
+        return false
+    result = true
+
+  proc processAddress(ifitem: ptr IpAdapterAddressesXp,
+                      ifunic: ptr IpAdapterUnicastAddressXpLh,
+                      vista: bool): InterfaceAddress =
+    var netfamily = ifunic.address.lpSockaddr.sa_family
+    fromSAddr(cast[ptr Sockaddr_storage](ifunic.address.lpSockaddr),
+              SockLen(ifunic.address.iSockaddrLength), result.ifaddr)
+    if not vista:
+      var prefix = ifitem.firstPrefix
+      var prefixLength = -1
+      while not isNil(prefix):
+        var pa: TransportAddress
+        var prefamily = prefix.address.lpSockaddr.sa_family
+        fromSAddr(cast[ptr Sockaddr_storage](prefix.address.lpSockaddr),
+                  SockLen(prefix.address.iSockaddrLength), pa)
+        if netfamily == prefamily:
+          if ipMatchPrefix(result.ifaddr, pa, cast[int](prefix.prefixLength)):
+            prefixLength = max(prefixLength, cast[int](prefix.prefixLength))
+        prefix = prefix.next
+      if prefixLength >= 0:
+        result.prefix = prefixLength
+    else:
+      let prefixLength = cast[int](ifunic.onLinkPrefixLength)
+      if prefixLength >= 0:
+        result.prefix = prefixLength
+
+  proc getInterfaces*(): seq[NetworkInterface] =
+    ## Return list of network interfaces.
+    result = newSeq[NetworkInterface]()
+    var size = WorkBufferSize
+    var tries = 0
+    var buffer: seq[byte]
+    var res: uint32
+    var vista = isVista()
+
+    while true:
+      buffer = newSeq[byte](size)
+      var addresses = cast[ptr IpAdapterAddressesXp](addr buffer[0])
+      res = GetAdaptersAddresses(AF_UNSPEC, GAA_FLAG_INCLUDE_PREFIX, nil,
+                                 addresses, addr size)
+      if res == ERROR_SUCCESS:
+        buffer.setLen(size)
+        break
+      elif res == ERROR_BUFFER_OVERFLOW:
+        discard
+      else:
+        break
+      inc(tries)
+      if tries >= MaxTries:
+        break
+
+    if res == ERROR_SUCCESS:
+      var slider = cast[ptr IpAdapterAddressesXp](addr buffer[0])
+      while not isNil(slider):
+        var iface = NetworkInterface(
+          ifIndex: cast[int](slider.ifIndex),
+          ifType: toInterfaceType(slider.ifType),
+          state: toInterfaceState(slider.operStatus),
+          name: $slider.adapterName,
+          desc: $slider.description,
+          mtu: cast[int](slider.mtu),
+          maclen: cast[int](slider.physicalAddressLength),
+          flags: cast[uint64](slider.flags)
+        )
+        copyMem(addr iface.mac[0], addr slider.physicalAddress[0],
+                len(iface.mac))
+        var unicast = slider.unicastAddress
+        while not isNil(unicast):
+          var ifaddr = processAddress(slider, unicast, vista)
+          iface.addresses.add(ifaddr)
+          unicast = unicast.next
+        result.add(iface)
+        slider = slider.next
+
+      sort(result, cmp)
+
+else:
+  {.fatal: "Sorry, your OS is currently not supported!".}
+
+when isMainModule:
+  var a = getInterfaces()
+  for item in a:
+    echo $item
diff --git a/tests/testiface.nim b/tests/testiface.nim
new file mode 100644
index 000000000..a82e6f92d
--- /dev/null
+++ b/tests/testiface.nim
@@ -0,0 +1,9 @@
+import unittest
+import ../libp2p/ipnet/iface
+
+suite "OS interfaces list suite":
+  test "Get interfaces list test":
+    var ifaces = getInterfaces()
+    for item in ifaces:
+      echo item
+    check len(ifaces) > 0