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 #if NET_2_0
  33 using System;
  34 using System.Collections.Generic;
  35 using System.Collections;
  36 using System.Net;
  37 using System.Net.Sockets;
  38 using System.Runtime.InteropServices;
  39 using System.Text;
  40 using System.IO;
  41 using System.Globalization;
  42
  43 namespace System.Net.NetworkInformation {
  44         public abstract class NetworkInterface {
  45                 static Version windowsVer51 = new Version (5, 1);
  46                 static internal readonly bool runningOnUnix = (Environment.OSVersion.Platform == PlatformID.Unix);
  47
  48                 protected NetworkInterface ()
  49                 {
  50                 }
  51
  52                 public static NetworkInterface [] GetAllNetworkInterfaces ()
  53                 {
  54                         if (runningOnUnix) {
  55                                 try {
  56                                         if (Platform.IsMacOS)
  57                                                 return MacOsNetworkInterface.ImplGetAllNetworkInterfaces ();
  58                                         else
  59                                                 return LinuxNetworkInterface.ImplGetAllNetworkInterfaces ();
  60                                 } catch (SystemException ex) {
  61                                         throw ex;
  62                                 } catch {
  63                                         return new NetworkInterface [0];
  64                                 }
  65                         } else {
  66                                 if (Environment.OSVersion.Version >= windowsVer51)
  67                                         return Win32NetworkInterface2.ImplGetAllNetworkInterfaces ();
  68                                 return new NetworkInterface [0];
  69                         }
  70                 }
  71
  72                 [MonoTODO("Always returns true")]
  73                 public static bool GetIsNetworkAvailable ()
  74                 {
  75                         return true;
  76                 }
  77
  78                 internal static string ReadLine (string path)
  79                 {
  80                         using (FileStream fs = File.OpenRead (path)){
  81                                 using (StreamReader sr = new StreamReader (fs)){
  82                                         return sr.ReadLine ();
  83                                 }
  84                         }
  85                 }
  86
  87                 [MonoTODO("Only works on Linux. Returns 0 on other systems.")]
  88                 public static int LoopbackInterfaceIndex {
  89                         get {
  90                                 if (runningOnUnix) {
  91                                         try {
  92                                                 return UnixNetworkInterface.IfNameToIndex ("lo");
  93                                         } catch  {
  94                                                 return 0;
  95                                         }
  96                                 } else
  97                                         return 0;
  98                         }
  99                 }
 100
 101                 public abstract IPInterfaceProperties GetIPProperties ();
 102                 public abstract IPv4InterfaceStatistics GetIPv4Statistics ();
 103                 public abstract PhysicalAddress GetPhysicalAddress ();
 104                 public abstract bool Supports (NetworkInterfaceComponent networkInterfaceComponent);
 105
 106                 public abstract string Description { get; }
 107                 public abstract string Id { get; }
 108                 public abstract bool IsReceiveOnly { get; }
 109                 public abstract string Name { get; }
 110                 public abstract NetworkInterfaceType NetworkInterfaceType { get; }
 111                 public abstract OperationalStatus OperationalStatus { get; }
 112                 public abstract long Speed { get; }
 113                 public abstract bool SupportsMulticast { get; }
 114         }
 115
 116         abstract class UnixNetworkInterface : NetworkInterface
 117         {
 118                 [DllImport("libc")]
 119                 static extern int if_nametoindex(string ifname);
 120
 121                 protected IPv4InterfaceStatistics ipv4stats;
 122                 protected IPInterfaceProperties ipproperties;
 123
 124                 string               name;
 125                 //int                  index;
 126                 protected List <IPAddress> addresses;
 127                 byte[]               macAddress;
 128                 NetworkInterfaceType type;
 129
 130                 internal UnixNetworkInterface (string name)
 131                 {
 132                         this.name = name;
 133                         addresses = new List<IPAddress> ();
 134                 }
 135
 136                 public static int IfNameToIndex (string ifname)
 137                 {
 138                         return if_nametoindex(ifname);
 139                 }
 140
 141                 internal void AddAddress (IPAddress address)
 142                 {
 143                         addresses.Add (address);
 144                 }
 145
 146                 internal void SetLinkLayerInfo (int index, byte[] macAddress, NetworkInterfaceType type)
 147                 {
 148                         //this.index = index;
 149                         this.macAddress = macAddress;
 150                         this.type = type;
 151                 }
 152
 153                 public override PhysicalAddress GetPhysicalAddress ()
 154                 {
 155                         if (macAddress != null)
 156                                 return new PhysicalAddress (macAddress);
 157                         else
 158                                 return PhysicalAddress.None;
 159                 }
 160
 161                 public override bool Supports (NetworkInterfaceComponent networkInterfaceComponent)
 162                 {
 163                         bool wantIPv4 = networkInterfaceComponent == NetworkInterfaceComponent.IPv4;
 164                         bool wantIPv6 = wantIPv4 ? false : networkInterfaceComponent == NetworkInterfaceComponent.IPv6;
 165
 166                         foreach (IPAddress address in addresses) {
 167                                 if (wantIPv4 && address.AddressFamily == AddressFamily.InterNetwork)
 168                                         return true;
 169                                 else if (wantIPv6 && address.AddressFamily == AddressFamily.InterNetworkV6)
 170                                         return true;
 171                         }
 172
 173                         return false;
 174                 }
 175
 176                 public override string Description {
 177                         get { return name; }
 178                 }
 179
 180                 public override string Id {
 181                         get { return name; }
 182                 }
 183
 184                 public override bool IsReceiveOnly {
 185                         get { return false; }
 186                 }
 187
 188                 public override string Name {
 189                         get { return name; }
 190                 }
 191
 192                 public override NetworkInterfaceType NetworkInterfaceType {
 193                         get { return type; }
 194                 }
 195
 196                 [MonoTODO ("Parse dmesg?")]
 197                 public override long Speed {
 198                         get {
 199                                 // Bits/s
 200                                 return 1000000;
 201                         }
 202                 }
 203         }
 204
 205         //
 206         // This class needs support from the libsupport.so library to fetch the
 207         // data using arch-specific ioctls.
 208         //
 209         // For this to work, we have to create this on the factory above.
 210         //
 211         class LinuxNetworkInterface : UnixNetworkInterface
 212         {
 213                 [DllImport ("libc")]
 214                 static extern int getifaddrs (out IntPtr ifap);
 215
 216                 [DllImport ("libc")]
 217                 static extern void freeifaddrs (IntPtr ifap);
 218
 219                 const int AF_INET   = 2;
 220                 const int AF_INET6  = 10;
 221                 const int AF_PACKET = 17;
 222
 223                 //NetworkInterfaceType type;
 224                 string               iface_path;
 225                 string               iface_operstate_path;
 226                 string               iface_flags_path;
 227
 228                 internal string IfacePath {
 229                         get { return iface_path; }
 230                 }
 231
 232                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 233                 {
 234                         var interfaces = new Dictionary <string, LinuxNetworkInterface> ();
 235                         IntPtr ifap;
 236                         if (getifaddrs (out ifap) != 0)
 237                                 throw new SystemException ("getifaddrs() failed");
 238
 239                         try {
 240                                 IntPtr next = ifap;
 241                                 while (next != IntPtr.Zero) {
 242                                         ifaddrs   addr = (ifaddrs) Marshal.PtrToStructure (next, typeof (ifaddrs));
 243                                         IPAddress address = IPAddress.None;
 244                                         string    name = addr.ifa_name;
 245                                         int       index = -1;
 246                                         byte[]    macAddress = null;
 247                                         NetworkInterfaceType type = NetworkInterfaceType.Unknown;
 248
 249                                         if (addr.ifa_addr != IntPtr.Zero) {
 250                                                 sockaddr_in sockaddr = (sockaddr_in) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_in));
 251
 252                                                 if (sockaddr.sin_family == AF_INET6) {
 253                                                         sockaddr_in6 sockaddr6 = (sockaddr_in6) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_in6));
 254                                                         address = new IPAddress (sockaddr6.sin6_addr.u6_addr8, sockaddr6.sin6_scope_id);
 255                                                 } else if (sockaddr.sin_family == AF_INET) {
 256                                                         address = new IPAddress (sockaddr.sin_addr);
 257                                                 } else if (sockaddr.sin_family == AF_PACKET) {
 258                                                         sockaddr_ll sockaddrll = (sockaddr_ll) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_ll));
 259                                                         if (((int)sockaddrll.sll_halen) > sockaddrll.sll_addr.Length){
 260                                                                 Console.Error.WriteLine ("Got a bad hardware address length for an AF_PACKET {0} {1}",
 261                                                                                          sockaddrll.sll_halen, sockaddrll.sll_addr.Length);
 262                                                                 next = addr.ifa_next;
 263                                                                 continue;
 264                                                         }
 265
 266                                                         macAddress = new byte [(int) sockaddrll.sll_halen];
 267                                                         Array.Copy (sockaddrll.sll_addr, 0, macAddress, 0, macAddress.Length);
 268                                                         index = sockaddrll.sll_ifindex;
 269
 270                                                         int hwtype = (int)sockaddrll.sll_hatype;
 271                                                         if (Enum.IsDefined (typeof (LinuxArpHardware), hwtype)) {
 272                                                                 switch ((LinuxArpHardware)hwtype) {
 273                                                                         case LinuxArpHardware.EETHER:
 274                                                                                 goto case LinuxArpHardware.ETHER;
 275
 276                                                                         case LinuxArpHardware.ETHER:
 277                                                                                 type = NetworkInterfaceType.Ethernet;
 278                                                                                 break;
 279
 280                                                                         case LinuxArpHardware.PRONET:
 281                                                                                 type = NetworkInterfaceType.TokenRing;
 282                                                                                 break;
 283
 284                                                                         case LinuxArpHardware.ATM:
 285                                                                                 type = NetworkInterfaceType.Atm;
 286                                                                                 break;
 287
 288                                                                         case LinuxArpHardware.SLIP:
 289                                                                                 type = NetworkInterfaceType.Slip;
 290                                                                                 break;
 291
 292                                                                         case LinuxArpHardware.PPP:
 293                                                                                 type = NetworkInterfaceType.Ppp;
 294                                                                                 break;
 295
 296                                                                         case LinuxArpHardware.LOOPBACK:
 297                                                                                 type = NetworkInterfaceType.Loopback;
 298                                                                                 macAddress = null;
 299                                                                                 break;
 300
 301                                                                         case LinuxArpHardware.FDDI:
 302                                                                                 type = NetworkInterfaceType.Fddi;
 303                                                                                 break;
 304
 305                                                                         case LinuxArpHardware.TUNNEL6:
 306                                                                                 goto case LinuxArpHardware.TUNNEL;
 307
 308                                                                         case LinuxArpHardware.TUNNEL:
 309                                                                                 type = NetworkInterfaceType.Tunnel;
 310                                                                                 break;
 311                                                                 }
 312                                                         }
 313                                                 }
 314                                         }
 315
 316                                         LinuxNetworkInterface iface = null;
 317
 318                                         if (!interfaces.TryGetValue (name, out iface)) {
 319                                                 iface = new LinuxNetworkInterface (name);
 320                                                 interfaces.Add (name, iface);
 321                                         }
 322
 323                                         if (!address.Equals (IPAddress.None))
 324                                                 iface.AddAddress (address);
 325
 326                                         if (macAddress != null || type == NetworkInterfaceType.Loopback) {
 327                                                 if (type == NetworkInterfaceType.Ethernet) {
 328                                                         if (Directory.Exists(iface.IfacePath + "wireless")) {
 329                                                                 type = NetworkInterfaceType.Wireless80211;
 330                                                         }
 331                                                 }
 332                                                 iface.SetLinkLayerInfo (index, macAddress, type);
 333                                         }
 334
 335                                         next = addr.ifa_next;
 336                                 }
 337                         } finally {
 338                                 freeifaddrs (ifap);
 339                         }
 340
 341                         NetworkInterface [] result = new NetworkInterface [interfaces.Count];
 342                         int x = 0;
 343                         foreach (NetworkInterface thisInterface in interfaces.Values) {
 344                                 result [x] = thisInterface;
 345                                 x++;
 346                         }
 347                         return result;
 348                 }
 349
 350                 LinuxNetworkInterface (string name)
 351                         : base (name)
 352                 {
 353                         iface_path = "/sys/class/net/" + name + "/";
 354                         iface_operstate_path = iface_path + "operstate";
 355                         iface_flags_path = iface_path + "flags";
 356                 }
 357
 358                 public override IPInterfaceProperties GetIPProperties ()
 359                 {
 360                         if (ipproperties == null)
 361                                 ipproperties = new LinuxIPInterfaceProperties (this, addresses);
 362                         return ipproperties;
 363                 }
 364
 365                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 366                 {
 367                         if (ipv4stats == null)
 368                                 ipv4stats = new LinuxIPv4InterfaceStatistics (this);
 369                         return ipv4stats;
 370                 }
 371
 372                 public override OperationalStatus OperationalStatus {
 373                         get {
 374                                 if (!Directory.Exists (iface_path))
 375                                         return OperationalStatus.Unknown;
 376
 377                                 try {
 378                                         string s = ReadLine (iface_operstate_path);
 379
 380                                         switch (s){
 381                                                 case "unknown":
 382                                                         return OperationalStatus.Unknown;
 383
 384                                                 case "notpresent":
 385                                                         return OperationalStatus.NotPresent;
 386
 387                                                 case "down":
 388                                                         return OperationalStatus.Down;
 389
 390                                                 case "lowerlayerdown":
 391                                                         return OperationalStatus.LowerLayerDown;
 392
 393                                                 case "testing":
 394                                                         return OperationalStatus.Testing;
 395
 396                                                 case "dormant":
 397                                                         return OperationalStatus.Dormant;
 398
 399                                                 case "up":
 400                                                         return OperationalStatus.Up;
 401                                         }
 402                                 } catch {
 403                                 }
 404                                 return OperationalStatus.Unknown;
 405                         }
 406                 }
 407
 408                 public override bool SupportsMulticast {
 409                         get {
 410                                 if (!Directory.Exists (iface_path))
 411                                         return false;
 412
 413                                 try {
 414                                         string s = ReadLine (iface_flags_path);
 415                                         if (s.Length > 2 && s [0] == '0' && s [1] == 'x')
 416                                                 s = s.Substring (2);
 417
 418                                         ulong f = UInt64.Parse (s, NumberStyles.HexNumber);
 419
 420                                         // Hardcoded, only useful for Linux.
 421                                         return ((f & 0x1000) == 0x1000);
 422                                 } catch {
 423                                         return false;
 424                                 }
 425                         }
 426                 }
 427         }
 428
 429         class MacOsNetworkInterface : UnixNetworkInterface
 430         {
 431                 [DllImport ("libc")]
 432                 static extern int getifaddrs (out IntPtr ifap);
 433
 434                 [DllImport ("libc")]
 435                 static extern void freeifaddrs (IntPtr ifap);
 436
 437                 const int AF_INET  = 2;
 438                 const int AF_INET6 = 30;
 439                 const int AF_LINK  = 18;
 440
 441                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 442                 {
 443                         var interfaces = new Dictionary <string, MacOsNetworkInterface> ();
 444                         IntPtr ifap;
 445                         if (getifaddrs (out ifap) != 0)
 446                                 throw new SystemException ("getifaddrs() failed");
 447
 448                         try {
 449                                 IntPtr next = ifap;
 450                                 while (next != IntPtr.Zero) {
 451                                         MacOsStructs.ifaddrs addr = (MacOsStructs.ifaddrs) Marshal.PtrToStructure (next, typeof (MacOsStructs.ifaddrs));
 452                                         IPAddress address = IPAddress.None;
 453                                         string    name = addr.ifa_name;
 454                                         int       index = -1;
 455                                         byte[]    macAddress = null;
 456                                         NetworkInterfaceType type = NetworkInterfaceType.Unknown;
 457
 458                                         if (addr.ifa_addr != IntPtr.Zero) {
 459                                                 MacOsStructs.sockaddr sockaddr = (MacOsStructs.sockaddr) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr));
 460
 461                                                 if (sockaddr.sa_family == AF_INET6) {
 462                                                         MacOsStructs.sockaddr_in6 sockaddr6 = (MacOsStructs.sockaddr_in6) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_in6));
 463                                                         address = new IPAddress (sockaddr6.sin6_addr.u6_addr8, sockaddr6.sin6_scope_id);
 464                                                 } else if (sockaddr.sa_family == AF_INET) {
 465                                                         MacOsStructs.sockaddr_in sockaddrin = (MacOsStructs.sockaddr_in) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_in));
 466                                                         address = new IPAddress (sockaddrin.sin_addr);
 467                                                 } else if (sockaddr.sa_family == AF_LINK) {
 468                                                         MacOsStructs.sockaddr_dl sockaddrdl = (MacOsStructs.sockaddr_dl) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_dl));
 469
 470                                                         macAddress = new byte [(int) sockaddrdl.sdl_alen];
 471                                                         Array.Copy (sockaddrdl.sdl_data, sockaddrdl.sdl_nlen, macAddress, 0, Math.Min (macAddress.Length, sockaddrdl.sdl_data.Length - sockaddrdl.sdl_nlen));
 472                                                         index = sockaddrdl.sdl_index;
 473
 474                                                         int hwtype = (int) sockaddrdl.sdl_type;
 475                                                         if (Enum.IsDefined (typeof (MacOsArpHardware), hwtype)) {
 476                                                                 switch ((MacOsArpHardware) hwtype) {
 477                                                                         case MacOsArpHardware.ETHER:
 478                                                                                 type = NetworkInterfaceType.Ethernet;
 479                                                                                 break;
 480
 481                                                                         case MacOsArpHardware.ATM:
 482                                                                                 type = NetworkInterfaceType.Atm;
 483                                                                                 break;
 484
 485                                                                         case MacOsArpHardware.SLIP:
 486                                                                                 type = NetworkInterfaceType.Slip;
 487                                                                                 break;
 488
 489                                                                         case MacOsArpHardware.PPP:
 490                                                                                 type = NetworkInterfaceType.Ppp;
 491                                                                                 break;
 492
 493                                                                         case MacOsArpHardware.LOOPBACK:
 494                                                                                 type = NetworkInterfaceType.Loopback;
 495                                                                                 macAddress = null;
 496                                                                                 break;
 497
 498                                                                         case MacOsArpHardware.FDDI:
 499                                                                                 type = NetworkInterfaceType.Fddi;
 500                                                                                 break;
 501                                                                 }
 502                                                         }
 503                                                 }
 504                                         }
 505
 506                                         MacOsNetworkInterface iface = null;
 507
 508                                         if (!interfaces.TryGetValue (name, out iface)) {
 509                                                 iface = new MacOsNetworkInterface (name);
 510                                                 interfaces.Add (name, iface);
 511                                         }
 512
 513                                         if (!address.Equals (IPAddress.None))
 514                                                 iface.AddAddress (address);
 515
 516                                         if (macAddress != null || type == NetworkInterfaceType.Loopback)
 517                                                 iface.SetLinkLayerInfo (index, macAddress, type);
 518
 519                                         next = addr.ifa_next;
 520                                 }
 521                         } finally {
 522                                 freeifaddrs (ifap);
 523                         }
 524
 525                         NetworkInterface [] result = new NetworkInterface [interfaces.Count];
 526                         int x = 0;
 527                         foreach (NetworkInterface thisInterface in interfaces.Values) {
 528                                 result [x] = thisInterface;
 529                                 x++;
 530                         }
 531                         return result;
 532                 }
 533
 534                 MacOsNetworkInterface (string name)
 535                         : base (name)
 536                 {
 537                 }
 538
 539                 public override IPInterfaceProperties GetIPProperties ()
 540                 {
 541                         if (ipproperties == null)
 542                                 ipproperties = new MacOsIPInterfaceProperties (this, addresses);
 543                         return ipproperties;
 544                 }
 545
 546                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 547                 {
 548                         if (ipv4stats == null)
 549                                 ipv4stats = new MacOsIPv4InterfaceStatistics (this);
 550                         return ipv4stats;
 551                 }
 552
 553                 public override OperationalStatus OperationalStatus {
 554                         get {
 555                                 return OperationalStatus.Unknown;
 556                         }
 557                 }
 558
 559                 public override bool SupportsMulticast {
 560                         get {
 561                                 return false;
 562                         }
 563                 }
 564         }
 565
 566         class Win32NetworkInterface2 : NetworkInterface
 567         {
 568                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 569                 static extern int GetAdaptersInfo (byte [] info, ref int size);
 570
 571                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 572                 static extern int GetAdaptersAddresses (uint family, uint flags, IntPtr reserved, byte [] info, ref int size);
 573
 574                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 575                 static extern int GetIfEntry (ref Win32_MIB_IFROW row);
 576
 577                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 578                 {
 579 //                      Win32_IP_ADAPTER_INFO [] ai = GetAdaptersInfo ();
 580                         Win32_IP_ADAPTER_ADDRESSES [] aa = GetAdaptersAddresses ();
 581                         NetworkInterface [] ret = new NetworkInterface [aa.Length];
 582                         for (int i = 0; i < ret.Length; i++)
 583                                 ret [i] = new Win32NetworkInterface2 (aa [i]);
 584                         return ret;
 585                 }
 586
 587                 public static Win32_IP_ADAPTER_INFO GetAdapterInfoByIndex (int index)
 588                 {
 589                         foreach (Win32_IP_ADAPTER_INFO info in GetAdaptersInfo ())
 590                                 if (info.Index == index)
 591                                         return info;
 592                         return null;
 593                 }
 594
 595                 unsafe static Win32_IP_ADAPTER_INFO [] GetAdaptersInfo ()
 596                 {
 597                         byte [] bytes = null;
 598                         int len = 0;
 599                         GetAdaptersInfo (bytes, ref len);
 600                         bytes = new byte [len];
 601                         int ret = GetAdaptersInfo (bytes, ref len);
 602
 603                         if (ret != 0)
 604                                 throw new NetworkInformationException (ret);
 605
 606                         List<Win32_IP_ADAPTER_INFO> l = new List<Win32_IP_ADAPTER_INFO> ();
 607                         fixed (byte* ptr = bytes) {
 608                                 Win32_IP_ADAPTER_INFO info;
 609                                 for (IntPtr p = (IntPtr) ptr; p != IntPtr.Zero; p = info.Next) {
 610                                         info = new Win32_IP_ADAPTER_INFO ();
 611                                         Marshal.PtrToStructure (p, info);
 612                                         l.Add (info);
 613                                 }
 614                         }
 615                         return l.ToArray ();
 616                 }
 617
 618                 unsafe static Win32_IP_ADAPTER_ADDRESSES [] GetAdaptersAddresses ()
 619                 {
 620                         byte [] bytes = null;
 621                         int len = 0;
 622                         GetAdaptersAddresses (0, 0, IntPtr.Zero, bytes, ref len);
 623                         bytes = new byte [len];
 624                         int ret = GetAdaptersAddresses (0, 0, IntPtr.Zero, bytes, ref len);
 625                         if (ret != 0)
 626                                 throw new NetworkInformationException (ret);
 627
 628                         List<Win32_IP_ADAPTER_ADDRESSES> l = new List<Win32_IP_ADAPTER_ADDRESSES> ();
 629                         fixed (byte* ptr = bytes) {
 630                                 Win32_IP_ADAPTER_ADDRESSES info;
 631                                 for (IntPtr p = (IntPtr) ptr; p != IntPtr.Zero; p = info.Next) {
 632                                         info = new Win32_IP_ADAPTER_ADDRESSES ();
 633                                         Marshal.PtrToStructure (p, info);
 634                                         l.Add (info);
 635                                 }
 636                         }
 637                         return l.ToArray ();
 638                 }
 639
 640                 Win32_IP_ADAPTER_ADDRESSES addr;
 641                 Win32_MIB_IFROW mib4, mib6;
 642                 Win32IPv4InterfaceStatistics ip4stats;
 643                 IPInterfaceProperties ip_if_props;
 644
 645                 Win32NetworkInterface2 (Win32_IP_ADAPTER_ADDRESSES addr)
 646                 {
 647                         this.addr = addr;
 648                         mib4 = default (Win32_MIB_IFROW);
 649                         mib4.Index = addr.Alignment.IfIndex;
 650                         if (GetIfEntry (ref mib4) != 0)
 651                                 mib4.Index = -1; // unavailable;
 652                         mib6 = default (Win32_MIB_IFROW);
 653                         mib6.Index = addr.Ipv6IfIndex;
 654                         if (GetIfEntry (ref mib6) != 0)
 655                                 mib6.Index = -1; // unavailable;
 656                         ip4stats = new Win32IPv4InterfaceStatistics (mib4);
 657                         ip_if_props = new Win32IPInterfaceProperties2 (addr, mib4, mib6);
 658                 }
 659
 660                 public override IPInterfaceProperties GetIPProperties ()
 661                 {
 662                         return ip_if_props;
 663                 }
 664
 665                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 666                 {
 667                         return ip4stats;
 668                 }
 669
 670                 public override PhysicalAddress GetPhysicalAddress ()
 671                 {
 672                         byte [] bytes = new byte [addr.PhysicalAddressLength];
 673                         Array.Copy (addr.PhysicalAddress, 0, bytes, 0, bytes.Length);
 674                         return new PhysicalAddress (bytes);
 675                 }
 676
 677                 public override bool Supports (NetworkInterfaceComponent networkInterfaceComponent)
 678                 {
 679                         switch (networkInterfaceComponent) {
 680                         case NetworkInterfaceComponent.IPv4:
 681                                 return mib4.Index >= 0;
 682                         case NetworkInterfaceComponent.IPv6:
 683                                 return mib6.Index >= 0;
 684                         }
 685                         return false;
 686                 }
 687
 688                 public override string Description {
 689                         get { return addr.Description; }
 690                 }
 691                 public override string Id {
 692                         get { return addr.AdapterName; }
 693                 }
 694                 public override bool IsReceiveOnly {
 695                         get { return addr.IsReceiveOnly; }
 696                 }
 697                 public override string Name {
 698                         get { return addr.FriendlyName; }
 699                 }
 700                 public override NetworkInterfaceType NetworkInterfaceType {
 701                         get { return addr.IfType; }
 702                 }
 703                 public override OperationalStatus OperationalStatus {
 704                         get { return addr.OperStatus; }
 705                 }
 706                 public override long Speed {
 707                         get { return mib6.Index >= 0 ? mib6.Speed : mib4.Speed; }
 708                 }
 709                 public override bool SupportsMulticast {
 710                         get { return !addr.NoMulticast; }
 711                 }
 712         }
 713 }
 714 #endif
 715