mcs/class/System/System.Net.NetworkInformation/NetworkInterface.cs

   1 //
   2 // System.Net.NetworkInformation.NetworkInterface
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   6 //      Atsushi Enomoto (atsushi@ximian.com)
   7 //      Miguel de Icaza (miguel@novell.com)
   8 //      Eric Butler (eric@extremeboredom.net)
   9 //      Marek Habersack (mhabersack@novell.com)
  10 //
  11 // Copyright (c) 2006-2008 Novell, Inc. (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32 using System;
  33 using System.Collections.Generic;
  34 using System.Collections;
  35 using System.Net;
  36 using System.Net.Sockets;
  37 using System.Runtime.InteropServices;
  38 using System.Text;
  39 using System.IO;
  40 using System.Globalization;
  41
  42 namespace System.Net.NetworkInformation {
  43         public abstract class NetworkInterface {
  44 #if MONOTOUCH
  45                 internal const bool runningOnUnix = true;
  46 #else
  47                 static Version windowsVer51 = new Version (5, 1);
  48                 static internal readonly bool runningOnUnix = (Environment.OSVersion.Platform == PlatformID.Unix);
  49 #endif
  50                 protected NetworkInterface ()
  51                 {
  52                 }
  53
  54                 public static NetworkInterface [] GetAllNetworkInterfaces ()
  55                 {
  56 #if MONOTOUCH
  57                         return MacOsNetworkInterface.ImplGetAllNetworkInterfaces ();
  58 #else
  59                         if (runningOnUnix) {
  60                                 try {
  61                                         if (Platform.IsMacOS || Platform.IsFreeBSD)
  62                                                 return MacOsNetworkInterface.ImplGetAllNetworkInterfaces ();
  63                                         else
  64                                                 return LinuxNetworkInterface.ImplGetAllNetworkInterfaces ();
  65                                 } catch (SystemException ex) {
  66                                         throw ex;
  67                                 } catch {
  68                                         return new NetworkInterface [0];
  69                                 }
  70                         } else {
  71                                 if (Environment.OSVersion.Version >= windowsVer51)
  72                                         return Win32NetworkInterface2.ImplGetAllNetworkInterfaces ();
  73                                 return new NetworkInterface [0];
  74                         }
  75 #endif
  76                 }
  77
  78                 [MonoTODO("Always returns true")]
  79                 public static bool GetIsNetworkAvailable ()
  80                 {
  81                         return true;
  82                 }
  83
  84                 internal static string ReadLine (string path)
  85                 {
  86                         using (FileStream fs = File.OpenRead (path)){
  87                                 using (StreamReader sr = new StreamReader (fs)){
  88                                         return sr.ReadLine ();
  89                                 }
  90                         }
  91                 }
  92
  93                 [MonoTODO("Only works on Linux. Returns 0 on other systems.")]
  94                 public static int LoopbackInterfaceIndex {
  95                         get {
  96                                 // Disable warning for code not reachable, due to runningOnUnix being always true on Monotouch
  97 #pragma warning disable 162
  98                                 if (runningOnUnix) {
  99                                         try {
 100                                                 return UnixNetworkInterface.IfNameToIndex ("lo");
 101                                         } catch  {
 102                                                 return 0;
 103                                         }
 104                                 } else
 105                                         return 0;
 106 #pragma warning restore 162
 107                         }
 108                 }
 109
 110                 public abstract IPInterfaceProperties GetIPProperties ();
 111                 public abstract IPv4InterfaceStatistics GetIPv4Statistics ();
 112                 public abstract PhysicalAddress GetPhysicalAddress ();
 113                 public abstract bool Supports (NetworkInterfaceComponent networkInterfaceComponent);
 114
 115                 public abstract string Description { get; }
 116                 public abstract string Id { get; }
 117                 public abstract bool IsReceiveOnly { get; }
 118                 public abstract string Name { get; }
 119                 public abstract NetworkInterfaceType NetworkInterfaceType { get; }
 120                 public abstract OperationalStatus OperationalStatus { get; }
 121                 public abstract long Speed { get; }
 122                 public abstract bool SupportsMulticast { get; }
 123         }
 124
 125         abstract class UnixNetworkInterface : NetworkInterface
 126         {
 127                 [DllImport("libc")]
 128                 static extern int if_nametoindex(string ifname);
 129
 130                 protected IPv4InterfaceStatistics ipv4stats;
 131                 protected IPInterfaceProperties ipproperties;
 132
 133                 string               name;
 134                 //int                  index;
 135                 protected List <IPAddress> addresses;
 136                 byte[]               macAddress;
 137                 NetworkInterfaceType type;
 138
 139                 internal UnixNetworkInterface (string name)
 140                 {
 141                         this.name = name;
 142                         addresses = new List<IPAddress> ();
 143                 }
 144
 145                 public static int IfNameToIndex (string ifname)
 146                 {
 147                         return if_nametoindex(ifname);
 148                 }
 149
 150                 internal void AddAddress (IPAddress address)
 151                 {
 152                         addresses.Add (address);
 153                 }
 154
 155                 internal void SetLinkLayerInfo (int index, byte[] macAddress, NetworkInterfaceType type)
 156                 {
 157                         //this.index = index;
 158                         this.macAddress = macAddress;
 159                         this.type = type;
 160                 }
 161
 162                 public override PhysicalAddress GetPhysicalAddress ()
 163                 {
 164                         if (macAddress != null)
 165                                 return new PhysicalAddress (macAddress);
 166                         else
 167                                 return PhysicalAddress.None;
 168                 }
 169
 170                 public override bool Supports (NetworkInterfaceComponent networkInterfaceComponent)
 171                 {
 172                         bool wantIPv4 = networkInterfaceComponent == NetworkInterfaceComponent.IPv4;
 173                         bool wantIPv6 = wantIPv4 ? false : networkInterfaceComponent == NetworkInterfaceComponent.IPv6;
 174
 175                         foreach (IPAddress address in addresses) {
 176                                 if (wantIPv4 && address.AddressFamily == AddressFamily.InterNetwork)
 177                                         return true;
 178                                 else if (wantIPv6 && address.AddressFamily == AddressFamily.InterNetworkV6)
 179                                         return true;
 180                         }
 181
 182                         return false;
 183                 }
 184
 185                 public override string Description {
 186                         get { return name; }
 187                 }
 188
 189                 public override string Id {
 190                         get { return name; }
 191                 }
 192
 193                 public override bool IsReceiveOnly {
 194                         get { return false; }
 195                 }
 196
 197                 public override string Name {
 198                         get { return name; }
 199                 }
 200
 201                 public override NetworkInterfaceType NetworkInterfaceType {
 202                         get { return type; }
 203                 }
 204
 205                 [MonoTODO ("Parse dmesg?")]
 206                 public override long Speed {
 207                         get {
 208                                 // Bits/s
 209                                 return 1000000;
 210                         }
 211                 }
 212         }
 213
 214         //
 215         // This class needs support from the libsupport.so library to fetch the
 216         // data using arch-specific ioctls.
 217         //
 218         // For this to work, we have to create this on the factory above.
 219         //
 220         class LinuxNetworkInterface : UnixNetworkInterface
 221         {
 222                 [DllImport ("libc")]
 223                 static extern int getifaddrs (out IntPtr ifap);
 224
 225                 [DllImport ("libc")]
 226                 static extern void freeifaddrs (IntPtr ifap);
 227
 228                 const int AF_INET   = 2;
 229                 const int AF_INET6  = 10;
 230                 const int AF_PACKET = 17;
 231
 232                 //NetworkInterfaceType type;
 233                 string               iface_path;
 234                 string               iface_operstate_path;
 235                 string               iface_flags_path;
 236
 237                 internal string IfacePath {
 238                         get { return iface_path; }
 239                 }
 240
 241                 static int GetInterfaceAddresses (out IntPtr ifap)
 242                 {
 243 #if MONODROID
 244                         return AndroidPlatform.GetInterfaceAddresses (out ifap);
 245 #else
 246                         return getifaddrs (out ifap);
 247 #endif
 248                 }
 249
 250                 static void FreeInterfaceAddresses (IntPtr ifap)
 251                 {
 252 #if MONODROID
 253                         AndroidPlatform.FreeInterfaceAddresses (ifap);
 254 #else
 255                         freeifaddrs (ifap);
 256 #endif
 257                 }
 258
 259                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 260                 {
 261                         var interfaces = new Dictionary <string, LinuxNetworkInterface> ();
 262                         IntPtr ifap;
 263                         if (GetInterfaceAddresses (out ifap) != 0)
 264                                 throw new SystemException ("getifaddrs() failed");
 265
 266                         try {
 267                                 IntPtr next = ifap;
 268                                 while (next != IntPtr.Zero) {
 269                                         ifaddrs   addr = (ifaddrs) Marshal.PtrToStructure (next, typeof (ifaddrs));
 270                                         IPAddress address = IPAddress.None;
 271                                         string    name = addr.ifa_name;
 272                                         int       index = -1;
 273                                         byte[]    macAddress = null;
 274                                         NetworkInterfaceType type = NetworkInterfaceType.Unknown;
 275                                         int       nullNameCount = 0;
 276
 277                                         if (addr.ifa_addr != IntPtr.Zero) {
 278                                                 sockaddr_in sockaddr = (sockaddr_in) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_in));
 279
 280                                                 if (sockaddr.sin_family == AF_INET6) {
 281                                                         sockaddr_in6 sockaddr6 = (sockaddr_in6) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_in6));
 282                                                         address = new IPAddress (sockaddr6.sin6_addr.u6_addr8, sockaddr6.sin6_scope_id);
 283                                                 } else if (sockaddr.sin_family == AF_INET) {
 284                                                         address = new IPAddress (sockaddr.sin_addr);
 285                                                 } else if (sockaddr.sin_family == AF_PACKET) {
 286                                                         sockaddr_ll sockaddrll = (sockaddr_ll) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_ll));
 287                                                         if (((int)sockaddrll.sll_halen) > sockaddrll.sll_addr.Length){
 288                                                                 Console.Error.WriteLine ("Got a bad hardware address length for an AF_PACKET {0} {1}",
 289                                                                                          sockaddrll.sll_halen, sockaddrll.sll_addr.Length);
 290                                                                 next = addr.ifa_next;
 291                                                                 continue;
 292                                                         }
 293
 294                                                         macAddress = new byte [(int) sockaddrll.sll_halen];
 295                                                         Array.Copy (sockaddrll.sll_addr, 0, macAddress, 0, macAddress.Length);
 296                                                         index = sockaddrll.sll_ifindex;
 297
 298                                                         int hwtype = (int)sockaddrll.sll_hatype;
 299                                                         if (Enum.IsDefined (typeof (LinuxArpHardware), hwtype)) {
 300                                                                 switch ((LinuxArpHardware)hwtype) {
 301                                                                         case LinuxArpHardware.EETHER:
 302                                                                                 goto case LinuxArpHardware.ETHER;
 303
 304                                                                         case LinuxArpHardware.ETHER:
 305                                                                                 type = NetworkInterfaceType.Ethernet;
 306                                                                                 break;
 307
 308                                                                         case LinuxArpHardware.PRONET:
 309                                                                                 type = NetworkInterfaceType.TokenRing;
 310                                                                                 break;
 311
 312                                                                         case LinuxArpHardware.ATM:
 313                                                                                 type = NetworkInterfaceType.Atm;
 314                                                                                 break;
 315
 316                                                                         case LinuxArpHardware.SLIP:
 317                                                                         case LinuxArpHardware.CSLIP:
 318                                                                         case LinuxArpHardware.SLIP6:
 319                                                                         case LinuxArpHardware.CSLIP6:
 320                                                                                 type = NetworkInterfaceType.Slip;
 321                                                                                 break;
 322
 323                                                                         case LinuxArpHardware.PPP:
 324                                                                                 type = NetworkInterfaceType.Ppp;
 325                                                                                 break;
 326
 327                                                                         case LinuxArpHardware.LOOPBACK:
 328                                                                                 type = NetworkInterfaceType.Loopback;
 329                                                                                 macAddress = null;
 330                                                                                 break;
 331
 332                                                                         case LinuxArpHardware.FDDI:
 333                                                                                 type = NetworkInterfaceType.Fddi;
 334                                                                                 break;
 335
 336                                                                         case LinuxArpHardware.SIT:
 337                                                                         case LinuxArpHardware.IPDDP:
 338                                                                         case LinuxArpHardware.IPGRE:
 339                                                                         case LinuxArpHardware.IP6GRE:
 340                                                                         case LinuxArpHardware.TUNNEL6:
 341                                                                         case LinuxArpHardware.TUNNEL:
 342                                                                                 type = NetworkInterfaceType.Tunnel;
 343                                                                                 break;
 344                                                                 }
 345                                                         }
 346                                                 }
 347                                         }
 348
 349                                         LinuxNetworkInterface iface = null;
 350
 351                                         if (String.IsNullOrEmpty (name))
 352                                                 name = "\0" + (++nullNameCount).ToString ();
 353
 354                                         if (!interfaces.TryGetValue (name, out iface)) {
 355                                                 iface = new LinuxNetworkInterface (name);
 356                                                 interfaces.Add (name, iface);
 357                                         }
 358
 359                                         if (!address.Equals (IPAddress.None))
 360                                                 iface.AddAddress (address);
 361
 362                                         if (macAddress != null || type == NetworkInterfaceType.Loopback) {
 363                                                 if (type == NetworkInterfaceType.Ethernet) {
 364                                                         if (Directory.Exists(iface.IfacePath + "wireless")) {
 365                                                                 type = NetworkInterfaceType.Wireless80211;
 366                                                         }
 367                                                 }
 368                                                 iface.SetLinkLayerInfo (index, macAddress, type);
 369                                         }
 370
 371                                         next = addr.ifa_next;
 372                                 }
 373                         } finally {
 374                                 FreeInterfaceAddresses (ifap);
 375                         }
 376
 377                         NetworkInterface [] result = new NetworkInterface [interfaces.Count];
 378                         int x = 0;
 379                         foreach (NetworkInterface thisInterface in interfaces.Values) {
 380                                 result [x] = thisInterface;
 381                                 x++;
 382                         }
 383                         return result;
 384                 }
 385
 386                 LinuxNetworkInterface (string name)
 387                         : base (name)
 388                 {
 389                         iface_path = "/sys/class/net/" + name + "/";
 390                         iface_operstate_path = iface_path + "operstate";
 391                         iface_flags_path = iface_path + "flags";
 392                 }
 393
 394                 public override IPInterfaceProperties GetIPProperties ()
 395                 {
 396                         if (ipproperties == null)
 397                                 ipproperties = new LinuxIPInterfaceProperties (this, addresses);
 398                         return ipproperties;
 399                 }
 400
 401                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 402                 {
 403                         if (ipv4stats == null)
 404                                 ipv4stats = new LinuxIPv4InterfaceStatistics (this);
 405                         return ipv4stats;
 406                 }
 407
 408                 public override OperationalStatus OperationalStatus {
 409                         get {
 410                                 if (!Directory.Exists (iface_path))
 411                                         return OperationalStatus.Unknown;
 412
 413                                 try {
 414                                         string s = ReadLine (iface_operstate_path);
 415
 416                                         switch (s){
 417                                                 case "unknown":
 418                                                         return OperationalStatus.Unknown;
 419
 420                                                 case "notpresent":
 421                                                         return OperationalStatus.NotPresent;
 422
 423                                                 case "down":
 424                                                         return OperationalStatus.Down;
 425
 426                                                 case "lowerlayerdown":
 427                                                         return OperationalStatus.LowerLayerDown;
 428
 429                                                 case "testing":
 430                                                         return OperationalStatus.Testing;
 431
 432                                                 case "dormant":
 433                                                         return OperationalStatus.Dormant;
 434
 435                                                 case "up":
 436                                                         return OperationalStatus.Up;
 437                                         }
 438                                 } catch {
 439                                 }
 440                                 return OperationalStatus.Unknown;
 441                         }
 442                 }
 443
 444                 public override bool SupportsMulticast {
 445                         get {
 446                                 if (!Directory.Exists (iface_path))
 447                                         return false;
 448
 449                                 try {
 450                                         string s = ReadLine (iface_flags_path);
 451                                         if (s.Length > 2 && s [0] == '0' && s [1] == 'x')
 452                                                 s = s.Substring (2);
 453
 454                                         ulong f = UInt64.Parse (s, NumberStyles.HexNumber);
 455
 456                                         // Hardcoded, only useful for Linux.
 457                                         return ((f & 0x1000) == 0x1000);
 458                                 } catch {
 459                                         return false;
 460                                 }
 461                         }
 462                 }
 463         }
 464
 465         class MacOsNetworkInterface : UnixNetworkInterface
 466         {
 467                 [DllImport ("libc")]
 468                 static extern int getifaddrs (out IntPtr ifap);
 469
 470                 [DllImport ("libc")]
 471                 static extern void freeifaddrs (IntPtr ifap);
 472
 473                 const int AF_INET  = 2;
 474                 const int AF_INET6 = 30;
 475                 const int AF_LINK  = 18;
 476
 477                 private uint _ifa_flags;
 478
 479                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 480                 {
 481                         var interfaces = new Dictionary <string, MacOsNetworkInterface> ();
 482                         IntPtr ifap;
 483                         if (getifaddrs (out ifap) != 0)
 484                                 throw new SystemException ("getifaddrs() failed");
 485
 486                         try {
 487                                 IntPtr next = ifap;
 488                                 while (next != IntPtr.Zero) {
 489                                         MacOsStructs.ifaddrs addr = (MacOsStructs.ifaddrs) Marshal.PtrToStructure (next, typeof (MacOsStructs.ifaddrs));
 490                                         IPAddress address = IPAddress.None;
 491                                         string    name = addr.ifa_name;
 492                                         int       index = -1;
 493                                         byte[]    macAddress = null;
 494                                         NetworkInterfaceType type = NetworkInterfaceType.Unknown;
 495
 496                                         if (addr.ifa_addr != IntPtr.Zero) {
 497                                                 // optain IPAddress
 498                                                 MacOsStructs.sockaddr sockaddr = (MacOsStructs.sockaddr) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr));
 499
 500                                                 if (sockaddr.sa_family == AF_INET6) {
 501                                                         MacOsStructs.sockaddr_in6 sockaddr6 = (MacOsStructs.sockaddr_in6) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_in6));
 502                                                         address = new IPAddress (sockaddr6.sin6_addr.u6_addr8, sockaddr6.sin6_scope_id);
 503                                                 } else if (sockaddr.sa_family == AF_INET) {
 504                                                         MacOsStructs.sockaddr_in sockaddrin = (MacOsStructs.sockaddr_in) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_in));
 505                                                         address = new IPAddress (sockaddrin.sin_addr);
 506                                                 } else if (sockaddr.sa_family == AF_LINK) {
 507                                                         MacOsStructs.sockaddr_dl sockaddrdl = new MacOsStructs.sockaddr_dl ();
 508                                                         sockaddrdl.Read (addr.ifa_addr);
 509
 510                                                         macAddress = new byte [(int) sockaddrdl.sdl_alen];
 511                                                         // copy mac address from sdl_data field starting at last index pos of interface name into array macaddress, starting
 512                                                         // at index 0
 513                                                         Array.Copy (sockaddrdl.sdl_data, sockaddrdl.sdl_nlen, macAddress, 0, Math.Min (macAddress.Length, sockaddrdl.sdl_data.Length - sockaddrdl.sdl_nlen));
 514
 515                                                         index = sockaddrdl.sdl_index;
 516
 517                                                         int hwtype = (int) sockaddrdl.sdl_type;
 518                                                         if (Enum.IsDefined (typeof (MacOsArpHardware), hwtype)) {
 519                                                                 switch ((MacOsArpHardware) hwtype) {
 520                                                                         case MacOsArpHardware.ETHER:
 521                                                                                 type = NetworkInterfaceType.Ethernet;
 522                                                                                 break;
 523
 524                                                                         case MacOsArpHardware.ATM:
 525                                                                                 type = NetworkInterfaceType.Atm;
 526                                                                                 break;
 527
 528                                                                         case MacOsArpHardware.SLIP:
 529                                                                                 type = NetworkInterfaceType.Slip;
 530                                                                                 break;
 531
 532                                                                         case MacOsArpHardware.PPP:
 533                                                                                 type = NetworkInterfaceType.Ppp;
 534                                                                                 break;
 535
 536                                                                         case MacOsArpHardware.LOOPBACK:
 537                                                                                 type = NetworkInterfaceType.Loopback;
 538                                                                                 macAddress = null;
 539                                                                                 break;
 540
 541                                                                         case MacOsArpHardware.FDDI:
 542                                                                                 type = NetworkInterfaceType.Fddi;
 543                                                                                 break;
 544                                                                 }
 545                                                         }
 546                                                 }
 547                                         }
 548
 549                                         MacOsNetworkInterface iface = null;
 550
 551                                         // create interface if not already present
 552                                         if (!interfaces.TryGetValue (name, out iface)) {
 553                                                 iface = new MacOsNetworkInterface (name, addr.ifa_flags);
 554                                                 interfaces.Add (name, iface);
 555                                         }
 556
 557                                         // if a new address has been found, add it
 558                                         if (!address.Equals (IPAddress.None))
 559                                                 iface.AddAddress (address);
 560
 561                                         // set link layer info, if iface has macaddress or is loopback device
 562                                         if (macAddress != null || type == NetworkInterfaceType.Loopback)
 563                                                 iface.SetLinkLayerInfo (index, macAddress, type);
 564
 565                                         next = addr.ifa_next;
 566                                 }
 567                         } finally {
 568                                 freeifaddrs (ifap);
 569                         }
 570
 571                         NetworkInterface [] result = new NetworkInterface [interfaces.Count];
 572                         int x = 0;
 573                         foreach (NetworkInterface thisInterface in interfaces.Values) {
 574                                 result [x] = thisInterface;
 575                                 x++;
 576                         }
 577                         return result;
 578                 }
 579
 580                 MacOsNetworkInterface (string name, uint ifa_flags)
 581                         : base (name)
 582                 {
 583                         _ifa_flags = ifa_flags;
 584                 }
 585
 586                 public override IPInterfaceProperties GetIPProperties ()
 587                 {
 588                         if (ipproperties == null)
 589                                 ipproperties = new MacOsIPInterfaceProperties (this, addresses);
 590                         return ipproperties;
 591                 }
 592
 593                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 594                 {
 595                         if (ipv4stats == null)
 596                                 ipv4stats = new MacOsIPv4InterfaceStatistics (this);
 597                         return ipv4stats;
 598                 }
 599
 600                 public override OperationalStatus OperationalStatus {
 601                         get {
 602                                 if(((MacOsInterfaceFlags)_ifa_flags & MacOsInterfaceFlags.IFF_UP) == MacOsInterfaceFlags.IFF_UP){
 603                                         return OperationalStatus.Up;
 604                                 }
 605                                 return OperationalStatus.Unknown;
 606                         }
 607                 }
 608
 609                 public override bool SupportsMulticast {
 610                         get {
 611                                 return ((MacOsInterfaceFlags)_ifa_flags & MacOsInterfaceFlags.IFF_MULTICAST) == MacOsInterfaceFlags.IFF_MULTICAST;
 612                         }
 613                 }
 614         }
 615
 616         class Win32NetworkInterface2 : NetworkInterface
 617         {
 618                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 619                 static extern int GetAdaptersInfo (byte [] info, ref int size);
 620
 621                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 622                 static extern int GetAdaptersAddresses (uint family, uint flags, IntPtr reserved, byte [] info, ref int size);
 623
 624                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 625                 static extern int GetIfEntry (ref Win32_MIB_IFROW row);
 626
 627                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 628                 {
 629 //                      Win32_IP_ADAPTER_INFO [] ai = GetAdaptersInfo ();
 630                         Win32_IP_ADAPTER_ADDRESSES [] aa = GetAdaptersAddresses ();
 631                         NetworkInterface [] ret = new NetworkInterface [aa.Length];
 632                         for (int i = 0; i < ret.Length; i++)
 633                                 ret [i] = new Win32NetworkInterface2 (aa [i]);
 634                         return ret;
 635                 }
 636
 637                 public static Win32_IP_ADAPTER_INFO GetAdapterInfoByIndex (int index)
 638                 {
 639                         foreach (Win32_IP_ADAPTER_INFO info in GetAdaptersInfo ())
 640                                 if (info.Index == index)
 641                                         return info;
 642                         return null;
 643                 }
 644
 645                 unsafe static Win32_IP_ADAPTER_INFO [] GetAdaptersInfo ()
 646                 {
 647                         byte [] bytes = null;
 648                         int len = 0;
 649                         GetAdaptersInfo (bytes, ref len);
 650                         bytes = new byte [len];
 651                         int ret = GetAdaptersInfo (bytes, ref len);
 652
 653                         if (ret != 0)
 654                                 throw new NetworkInformationException (ret);
 655
 656                         List<Win32_IP_ADAPTER_INFO> l = new List<Win32_IP_ADAPTER_INFO> ();
 657                         fixed (byte* ptr = bytes) {
 658                                 Win32_IP_ADAPTER_INFO info;
 659                                 for (IntPtr p = (IntPtr) ptr; p != IntPtr.Zero; p = info.Next) {
 660                                         info = new Win32_IP_ADAPTER_INFO ();
 661                                         Marshal.PtrToStructure (p, info);
 662                                         l.Add (info);
 663                                 }
 664                         }
 665                         return l.ToArray ();
 666                 }
 667
 668                 unsafe static Win32_IP_ADAPTER_ADDRESSES [] GetAdaptersAddresses ()
 669                 {
 670                         byte [] bytes = null;
 671                         int len = 0;
 672                         GetAdaptersAddresses (0, 0, IntPtr.Zero, bytes, ref len);
 673                         bytes = new byte [len];
 674                         int ret = GetAdaptersAddresses (0, 0, IntPtr.Zero, bytes, ref len);
 675                         if (ret != 0)
 676                                 throw new NetworkInformationException (ret);
 677
 678                         List<Win32_IP_ADAPTER_ADDRESSES> l = new List<Win32_IP_ADAPTER_ADDRESSES> ();
 679                         fixed (byte* ptr = bytes) {
 680                                 Win32_IP_ADAPTER_ADDRESSES info;
 681                                 for (IntPtr p = (IntPtr) ptr; p != IntPtr.Zero; p = info.Next) {
 682                                         info = new Win32_IP_ADAPTER_ADDRESSES ();
 683                                         Marshal.PtrToStructure (p, info);
 684                                         l.Add (info);
 685                                 }
 686                         }
 687                         return l.ToArray ();
 688                 }
 689
 690                 Win32_IP_ADAPTER_ADDRESSES addr;
 691                 Win32_MIB_IFROW mib4, mib6;
 692                 Win32IPv4InterfaceStatistics ip4stats;
 693                 IPInterfaceProperties ip_if_props;
 694
 695                 Win32NetworkInterface2 (Win32_IP_ADAPTER_ADDRESSES addr)
 696                 {
 697                         this.addr = addr;
 698                         mib4 = default (Win32_MIB_IFROW);
 699                         mib4.Index = addr.Alignment.IfIndex;
 700                         if (GetIfEntry (ref mib4) != 0)
 701                                 mib4.Index = -1; // unavailable;
 702                         mib6 = default (Win32_MIB_IFROW);
 703                         mib6.Index = addr.Ipv6IfIndex;
 704                         if (GetIfEntry (ref mib6) != 0)
 705                                 mib6.Index = -1; // unavailable;
 706                         ip4stats = new Win32IPv4InterfaceStatistics (mib4);
 707                         ip_if_props = new Win32IPInterfaceProperties2 (addr, mib4, mib6);
 708                 }
 709
 710                 public override IPInterfaceProperties GetIPProperties ()
 711                 {
 712                         return ip_if_props;
 713                 }
 714
 715                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 716                 {
 717                         return ip4stats;
 718                 }
 719
 720                 public override PhysicalAddress GetPhysicalAddress ()
 721                 {
 722                         byte [] bytes = new byte [addr.PhysicalAddressLength];
 723                         Array.Copy (addr.PhysicalAddress, 0, bytes, 0, bytes.Length);
 724                         return new PhysicalAddress (bytes);
 725                 }
 726
 727                 public override bool Supports (NetworkInterfaceComponent networkInterfaceComponent)
 728                 {
 729                         switch (networkInterfaceComponent) {
 730                         case NetworkInterfaceComponent.IPv4:
 731                                 return mib4.Index >= 0;
 732                         case NetworkInterfaceComponent.IPv6:
 733                                 return mib6.Index >= 0;
 734                         }
 735                         return false;
 736                 }
 737
 738                 public override string Description {
 739                         get { return addr.Description; }
 740                 }
 741                 public override string Id {
 742                         get { return addr.AdapterName; }
 743                 }
 744                 public override bool IsReceiveOnly {
 745                         get { return addr.IsReceiveOnly; }
 746                 }
 747                 public override string Name {
 748                         get { return addr.FriendlyName; }
 749                 }
 750                 public override NetworkInterfaceType NetworkInterfaceType {
 751                         get { return addr.IfType; }
 752                 }
 753                 public override OperationalStatus OperationalStatus {
 754                         get { return addr.OperStatus; }
 755                 }
 756                 public override long Speed {
 757                         get { return mib6.Index >= 0 ? mib6.Speed : mib4.Speed; }
 758                 }
 759                 public override bool SupportsMulticast {
 760                         get { return !addr.NoMulticast; }
 761                 }
 762         }
 763 }
 764