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                 [DllImport ("libc")]
  46                 static extern int uname (IntPtr buf);
  47
  48                 static Version windowsVer51 = new Version (5, 1);
  49                 static internal readonly bool runningOnUnix = (Environment.OSVersion.Platform == PlatformID.Unix);
  50
  51                 protected NetworkInterface ()
  52                 {
  53                 }
  54
  55                 [MonoTODO("Only works on Linux and Windows")]
  56                 public static NetworkInterface [] GetAllNetworkInterfaces ()
  57                 {
  58                         if (runningOnUnix) {
  59                                 bool darwin = false;
  60                                 IntPtr buf = Marshal.AllocHGlobal (8192);
  61                                 if (uname (buf) == 0) {
  62                                         string os = Marshal.PtrToStringAnsi (buf);
  63                                         if (os == "Darwin")
  64                                                 darwin = true;
  65                                 }
  66                                 Marshal.FreeHGlobal (buf);
  67
  68                                 try {
  69                                         if (darwin)
  70                                                 return MacOsNetworkInterface.ImplGetAllNetworkInterfaces ();
  71                                         else
  72                                                 return LinuxNetworkInterface.ImplGetAllNetworkInterfaces ();
  73                                 } catch (SystemException ex) {
  74                                         throw ex;
  75                                 } catch {
  76                                         return new NetworkInterface [0];
  77                                 }
  78                         } else {
  79                                 if (Environment.OSVersion.Version >= windowsVer51)
  80                                         return Win32NetworkInterface2.ImplGetAllNetworkInterfaces ();
  81                                 return new NetworkInterface [0];
  82                         }
  83                 }
  84
  85                 [MonoTODO("Always returns true")]
  86                 public static bool GetIsNetworkAvailable ()
  87                 {
  88                         return true;
  89                 }
  90
  91                 internal static string ReadLine (string path)
  92                 {
  93                         using (FileStream fs = File.OpenRead (path)){
  94                                 using (StreamReader sr = new StreamReader (fs)){
  95                                         return sr.ReadLine ();
  96                                 }
  97                         }
  98                 }
  99
 100                 [MonoTODO("Only works on Linux. Returns 0 on other systems.")]
 101                 public static int LoopbackInterfaceIndex {
 102                         get {
 103                                 if (runningOnUnix) {
 104                                         try {
 105                                                 return UnixNetworkInterface.IfNameToIndex ("lo");
 106                                         } catch  {
 107                                                 return 0;
 108                                         }
 109                                 } else
 110                                         return 0;
 111                         }
 112                 }
 113
 114                 public abstract IPInterfaceProperties GetIPProperties ();
 115                 public abstract IPv4InterfaceStatistics GetIPv4Statistics ();
 116                 public abstract PhysicalAddress GetPhysicalAddress ();
 117                 public abstract bool Supports (NetworkInterfaceComponent networkInterfaceComponent);
 118
 119                 public abstract string Description { get; }
 120                 public abstract string Id { get; }
 121                 public abstract bool IsReceiveOnly { get; }
 122                 public abstract string Name { get; }
 123                 public abstract NetworkInterfaceType NetworkInterfaceType { get; }
 124                 public abstract OperationalStatus OperationalStatus { get; }
 125                 public abstract long Speed { get; }
 126                 public abstract bool SupportsMulticast { get; }
 127         }
 128
 129         abstract class UnixNetworkInterface : NetworkInterface
 130         {
 131                 [DllImport("libc")]
 132                 static extern int if_nametoindex(string ifname);
 133
 134                 protected IPv4InterfaceStatistics ipv4stats;
 135                 protected IPInterfaceProperties ipproperties;
 136
 137                 string               name;
 138                 //int                  index;
 139                 protected List <IPAddress> addresses;
 140                 byte[]               macAddress;
 141                 NetworkInterfaceType type;
 142
 143                 internal UnixNetworkInterface (string name)
 144                 {
 145                         this.name = name;
 146                         addresses = new List<IPAddress> ();
 147                 }
 148
 149                 public static int IfNameToIndex (string ifname)
 150                 {
 151                         return if_nametoindex(ifname);
 152                 }
 153
 154                 internal void AddAddress (IPAddress address)
 155                 {
 156                         addresses.Add (address);
 157                 }
 158
 159                 internal void SetLinkLayerInfo (int index, byte[] macAddress, NetworkInterfaceType type)
 160                 {
 161                         //this.index = index;
 162                         this.macAddress = macAddress;
 163                         this.type = type;
 164                 }
 165
 166                 public override PhysicalAddress GetPhysicalAddress ()
 167                 {
 168                         if (macAddress != null)
 169                                 return new PhysicalAddress (macAddress);
 170                         else
 171                                 return PhysicalAddress.None;
 172                 }
 173
 174                 public override bool Supports (NetworkInterfaceComponent networkInterfaceComponent)
 175                 {
 176                         bool wantIPv4 = networkInterfaceComponent == NetworkInterfaceComponent.IPv4;
 177                         bool wantIPv6 = wantIPv4 ? false : networkInterfaceComponent == NetworkInterfaceComponent.IPv6;
 178
 179                         foreach (IPAddress address in addresses) {
 180                                 if (wantIPv4 && address.AddressFamily == AddressFamily.InterNetwork)
 181                                         return true;
 182                                 else if (wantIPv6 && address.AddressFamily == AddressFamily.InterNetworkV6)
 183                                         return true;
 184                         }
 185
 186                         return false;
 187                 }
 188
 189                 public override string Description {
 190                         get { return name; }
 191                 }
 192
 193                 public override string Id {
 194                         get { return name; }
 195                 }
 196
 197                 public override bool IsReceiveOnly {
 198                         get { return false; }
 199                 }
 200
 201                 public override string Name {
 202                         get { return name; }
 203                 }
 204
 205                 public override NetworkInterfaceType NetworkInterfaceType {
 206                         get { return type; }
 207                 }
 208
 209                 [MonoTODO ("Parse dmesg?")]
 210                 public override long Speed {
 211                         get {
 212                                 // Bits/s
 213                                 return 1000000;
 214                         }
 215                 }
 216         }
 217
 218         //
 219         // This class needs support from the libsupport.so library to fetch the
 220         // data using arch-specific ioctls.
 221         //
 222         // For this to work, we have to create this on the factory above.
 223         //
 224         class LinuxNetworkInterface : UnixNetworkInterface
 225         {
 226                 [DllImport ("libc")]
 227                 static extern int getifaddrs (out IntPtr ifap);
 228
 229                 [DllImport ("libc")]
 230                 static extern void freeifaddrs (IntPtr ifap);
 231
 232                 const int AF_INET   = 2;
 233                 const int AF_INET6  = 10;
 234                 const int AF_PACKET = 17;
 235
 236                 //NetworkInterfaceType type;
 237                 string               iface_path;
 238                 string               iface_operstate_path;
 239                 string               iface_flags_path;
 240
 241                 internal string IfacePath {
 242                         get { return iface_path; }
 243                 }
 244
 245                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 246                 {
 247                         var interfaces = new Dictionary <string, LinuxNetworkInterface> ();
 248                         IntPtr ifap;
 249                         if (getifaddrs (out ifap) != 0)
 250                                 throw new SystemException ("getifaddrs() failed");
 251
 252                         try {
 253                                 IntPtr next = ifap;
 254                                 while (next != IntPtr.Zero) {
 255                                         ifaddrs   addr = (ifaddrs) Marshal.PtrToStructure (next, typeof (ifaddrs));
 256                                         IPAddress address = IPAddress.None;
 257                                         string    name = addr.ifa_name;
 258                                         int       index = -1;
 259                                         byte[]    macAddress = null;
 260                                         NetworkInterfaceType type = NetworkInterfaceType.Unknown;
 261
 262                                         if (addr.ifa_addr != IntPtr.Zero) {
 263                                                 sockaddr_in sockaddr = (sockaddr_in) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_in));
 264
 265                                                 if (sockaddr.sin_family == AF_INET6) {
 266                                                         sockaddr_in6 sockaddr6 = (sockaddr_in6) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_in6));
 267                                                         address = new IPAddress (sockaddr6.sin6_addr.u6_addr8, sockaddr6.sin6_scope_id);
 268                                                 } else if (sockaddr.sin_family == AF_INET) {
 269                                                         address = new IPAddress (sockaddr.sin_addr);
 270                                                 } else if (sockaddr.sin_family == AF_PACKET) {
 271                                                         sockaddr_ll sockaddrll = (sockaddr_ll) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_ll));
 272                                                         if (((int)sockaddrll.sll_halen) > sockaddrll.sll_addr.Length){
 273                                                                 Console.Error.WriteLine ("Got a bad hardware address length for an AF_PACKET {0} {1}",
 274                                                                                          sockaddrll.sll_halen, sockaddrll.sll_addr.Length);
 275                                                                 next = addr.ifa_next;
 276                                                                 continue;
 277                                                         }
 278
 279                                                         macAddress = new byte [(int) sockaddrll.sll_halen];
 280                                                         Array.Copy (sockaddrll.sll_addr, 0, macAddress, 0, macAddress.Length);
 281                                                         index = sockaddrll.sll_ifindex;
 282
 283                                                         int hwtype = (int)sockaddrll.sll_hatype;
 284                                                         if (Enum.IsDefined (typeof (LinuxArpHardware), hwtype)) {
 285                                                                 switch ((LinuxArpHardware)hwtype) {
 286                                                                         case LinuxArpHardware.EETHER:
 287                                                                                 goto case LinuxArpHardware.ETHER;
 288
 289                                                                         case LinuxArpHardware.ETHER:
 290                                                                                 type = NetworkInterfaceType.Ethernet;
 291                                                                                 break;
 292
 293                                                                         case LinuxArpHardware.PRONET:
 294                                                                                 type = NetworkInterfaceType.TokenRing;
 295                                                                                 break;
 296
 297                                                                         case LinuxArpHardware.ATM:
 298                                                                                 type = NetworkInterfaceType.Atm;
 299                                                                                 break;
 300
 301                                                                         case LinuxArpHardware.SLIP:
 302                                                                                 type = NetworkInterfaceType.Slip;
 303                                                                                 break;
 304
 305                                                                         case LinuxArpHardware.PPP:
 306                                                                                 type = NetworkInterfaceType.Ppp;
 307                                                                                 break;
 308
 309                                                                         case LinuxArpHardware.LOOPBACK:
 310                                                                                 type = NetworkInterfaceType.Loopback;
 311                                                                                 macAddress = null;
 312                                                                                 break;
 313
 314                                                                         case LinuxArpHardware.FDDI:
 315                                                                                 type = NetworkInterfaceType.Fddi;
 316                                                                                 break;
 317
 318                                                                         case LinuxArpHardware.TUNNEL6:
 319                                                                                 goto case LinuxArpHardware.TUNNEL;
 320
 321                                                                         case LinuxArpHardware.TUNNEL:
 322                                                                                 type = NetworkInterfaceType.Tunnel;
 323                                                                                 break;
 324                                                                 }
 325                                                         }
 326                                                 }
 327                                         }
 328
 329                                         LinuxNetworkInterface iface = null;
 330
 331                                         if (!interfaces.TryGetValue (name, out iface)) {
 332                                                 iface = new LinuxNetworkInterface (name);
 333                                                 interfaces.Add (name, iface);
 334                                         }
 335
 336                                         if (!address.Equals (IPAddress.None))
 337                                                 iface.AddAddress (address);
 338
 339                                         if (macAddress != null || type == NetworkInterfaceType.Loopback) {
 340                                                 if (type == NetworkInterfaceType.Ethernet) {
 341                                                         if (Directory.Exists(iface.IfacePath + "wireless")) {
 342                                                                 type = NetworkInterfaceType.Wireless80211;
 343                                                         }
 344                                                 }
 345                                                 iface.SetLinkLayerInfo (index, macAddress, type);
 346                                         }
 347
 348                                         next = addr.ifa_next;
 349                                 }
 350                         } finally {
 351                                 freeifaddrs (ifap);
 352                         }
 353
 354                         NetworkInterface [] result = new NetworkInterface [interfaces.Count];
 355                         int x = 0;
 356                         foreach (NetworkInterface thisInterface in interfaces.Values) {
 357                                 result [x] = thisInterface;
 358                                 x++;
 359                         }
 360                         return result;
 361                 }
 362
 363                 LinuxNetworkInterface (string name)
 364                         : base (name)
 365                 {
 366                         iface_path = "/sys/class/net/" + name + "/";
 367                         iface_operstate_path = iface_path + "operstate";
 368                         iface_flags_path = iface_path + "flags";
 369                 }
 370
 371                 public override IPInterfaceProperties GetIPProperties ()
 372                 {
 373                         if (ipproperties == null)
 374                                 ipproperties = new LinuxIPInterfaceProperties (this, addresses);
 375                         return ipproperties;
 376                 }
 377
 378                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 379                 {
 380                         if (ipv4stats == null)
 381                                 ipv4stats = new LinuxIPv4InterfaceStatistics (this);
 382                         return ipv4stats;
 383                 }
 384
 385                 public override OperationalStatus OperationalStatus {
 386                         get {
 387                                 if (!Directory.Exists (iface_path))
 388                                         return OperationalStatus.Unknown;
 389
 390                                 try {
 391                                         string s = ReadLine (iface_operstate_path);
 392
 393                                         switch (s){
 394                                                 case "unknown":
 395                                                         return OperationalStatus.Unknown;
 396
 397                                                 case "notpresent":
 398                                                         return OperationalStatus.NotPresent;
 399
 400                                                 case "down":
 401                                                         return OperationalStatus.Down;
 402
 403                                                 case "lowerlayerdown":
 404                                                         return OperationalStatus.LowerLayerDown;
 405
 406                                                 case "testing":
 407                                                         return OperationalStatus.Testing;
 408
 409                                                 case "dormant":
 410                                                         return OperationalStatus.Dormant;
 411
 412                                                 case "up":
 413                                                         return OperationalStatus.Up;
 414                                         }
 415                                 } catch {
 416                                 }
 417                                 return OperationalStatus.Unknown;
 418                         }
 419                 }
 420
 421                 public override bool SupportsMulticast {
 422                         get {
 423                                 if (!Directory.Exists (iface_path))
 424                                         return false;
 425
 426                                 try {
 427                                         string s = ReadLine (iface_flags_path);
 428                                         if (s.Length > 2 && s [0] == '0' && s [1] == 'x')
 429                                                 s = s.Substring (2);
 430
 431                                         ulong f = UInt64.Parse (s, NumberStyles.HexNumber);
 432
 433                                         // Hardcoded, only useful for Linux.
 434                                         return ((f & 0x1000) == 0x1000);
 435                                 } catch {
 436                                         return false;
 437                                 }
 438                         }
 439                 }
 440         }
 441
 442         class MacOsNetworkInterface : UnixNetworkInterface
 443         {
 444                 [DllImport ("libc")]
 445                 static extern int getifaddrs (out IntPtr ifap);
 446
 447                 [DllImport ("libc")]
 448                 static extern void freeifaddrs (IntPtr ifap);
 449
 450                 const int AF_INET  = 2;
 451                 const int AF_INET6 = 30;
 452                 const int AF_LINK  = 18;
 453
 454                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 455                 {
 456                         var interfaces = new Dictionary <string, MacOsNetworkInterface> ();
 457                         IntPtr ifap;
 458                         if (getifaddrs (out ifap) != 0)
 459                                 throw new SystemException ("getifaddrs() failed");
 460
 461                         try {
 462                                 IntPtr next = ifap;
 463                                 while (next != IntPtr.Zero) {
 464                                         MacOsStructs.ifaddrs addr = (MacOsStructs.ifaddrs) Marshal.PtrToStructure (next, typeof (MacOsStructs.ifaddrs));
 465                                         IPAddress address = IPAddress.None;
 466                                         string    name = addr.ifa_name;
 467                                         int       index = -1;
 468                                         byte[]    macAddress = null;
 469                                         NetworkInterfaceType type = NetworkInterfaceType.Unknown;
 470
 471                                         if (addr.ifa_addr != IntPtr.Zero) {
 472                                                 MacOsStructs.sockaddr sockaddr = (MacOsStructs.sockaddr) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr));
 473
 474                                                 if (sockaddr.sa_family == AF_INET6) {
 475                                                         MacOsStructs.sockaddr_in6 sockaddr6 = (MacOsStructs.sockaddr_in6) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_in6));
 476                                                         address = new IPAddress (sockaddr6.sin6_addr.u6_addr8, sockaddr6.sin6_scope_id);
 477                                                 } else if (sockaddr.sa_family == AF_INET) {
 478                                                         MacOsStructs.sockaddr_in sockaddrin = (MacOsStructs.sockaddr_in) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_in));
 479                                                         address = new IPAddress (sockaddrin.sin_addr);
 480                                                 } else if (sockaddr.sa_family == AF_LINK) {
 481                                                         MacOsStructs.sockaddr_dl sockaddrdl = (MacOsStructs.sockaddr_dl) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_dl));
 482
 483                                                         macAddress = new byte [(int) sockaddrdl.sdl_alen];
 484                                                         Array.Copy (sockaddrdl.sdl_data, sockaddrdl.sdl_alen, macAddress, 0, macAddress.Length);
 485                                                         index = sockaddrdl.sdl_index;
 486
 487                                                         int hwtype = (int) sockaddrdl.sdl_type;
 488                                                         if (Enum.IsDefined (typeof (MacOsArpHardware), hwtype)) {
 489                                                                 switch ((MacOsArpHardware) hwtype) {
 490                                                                         case MacOsArpHardware.ETHER:
 491                                                                                 type = NetworkInterfaceType.Ethernet;
 492                                                                                 break;
 493
 494                                                                         case MacOsArpHardware.ATM:
 495                                                                                 type = NetworkInterfaceType.Atm;
 496                                                                                 break;
 497
 498                                                                         case MacOsArpHardware.SLIP:
 499                                                                                 type = NetworkInterfaceType.Slip;
 500                                                                                 break;
 501
 502                                                                         case MacOsArpHardware.PPP:
 503                                                                                 type = NetworkInterfaceType.Ppp;
 504                                                                                 break;
 505
 506                                                                         case MacOsArpHardware.LOOPBACK:
 507                                                                                 type = NetworkInterfaceType.Loopback;
 508                                                                                 macAddress = null;
 509                                                                                 break;
 510
 511                                                                         case MacOsArpHardware.FDDI:
 512                                                                                 type = NetworkInterfaceType.Fddi;
 513                                                                                 break;
 514                                                                 }
 515                                                         }
 516                                                 }
 517                                         }
 518
 519                                         MacOsNetworkInterface iface = null;
 520
 521                                         if (!interfaces.TryGetValue (name, out iface)) {
 522                                                 iface = new MacOsNetworkInterface (name);
 523                                                 interfaces.Add (name, iface);
 524                                         }
 525
 526                                         if (!address.Equals (IPAddress.None))
 527                                                 iface.AddAddress (address);
 528
 529                                         if (macAddress != null || type == NetworkInterfaceType.Loopback)
 530                                                 iface.SetLinkLayerInfo (index, macAddress, type);
 531
 532                                         next = addr.ifa_next;
 533                                 }
 534                         } finally {
 535                                 freeifaddrs (ifap);
 536                         }
 537
 538                         NetworkInterface [] result = new NetworkInterface [interfaces.Count];
 539                         int x = 0;
 540                         foreach (NetworkInterface thisInterface in interfaces.Values) {
 541                                 result [x] = thisInterface;
 542                                 x++;
 543                         }
 544                         return result;
 545                 }
 546
 547                 MacOsNetworkInterface (string name)
 548                         : base (name)
 549                 {
 550                 }
 551
 552                 public override IPInterfaceProperties GetIPProperties ()
 553                 {
 554                         if (ipproperties == null)
 555                                 ipproperties = new MacOsIPInterfaceProperties (this, addresses);
 556                         return ipproperties;
 557                 }
 558
 559                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 560                 {
 561                         if (ipv4stats == null)
 562                                 ipv4stats = new MacOsIPv4InterfaceStatistics (this);
 563                         return ipv4stats;
 564                 }
 565
 566                 public override OperationalStatus OperationalStatus {
 567                         get {
 568                                 return OperationalStatus.Unknown;
 569                         }
 570                 }
 571
 572                 public override bool SupportsMulticast {
 573                         get {
 574                                 return false;
 575                         }
 576                 }
 577         }
 578
 579         class Win32NetworkInterface2 : NetworkInterface
 580         {
 581                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 582                 static extern int GetAdaptersInfo (byte [] info, ref int size);
 583
 584                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 585                 static extern int GetAdaptersAddresses (uint family, uint flags, IntPtr reserved, byte [] info, ref int size);
 586
 587                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 588                 static extern int GetIfEntry (ref Win32_MIB_IFROW row);
 589
 590                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 591                 {
 592 //                      Win32_IP_ADAPTER_INFO [] ai = GetAdaptersInfo ();
 593                         Win32_IP_ADAPTER_ADDRESSES [] aa = GetAdaptersAddresses ();
 594                         NetworkInterface [] ret = new NetworkInterface [aa.Length];
 595                         for (int i = 0; i < ret.Length; i++)
 596                                 ret [i] = new Win32NetworkInterface2 (aa [i]);
 597                         return ret;
 598                 }
 599
 600                 public static Win32_IP_ADAPTER_INFO GetAdapterInfoByIndex (int index)
 601                 {
 602                         foreach (Win32_IP_ADAPTER_INFO info in GetAdaptersInfo ())
 603                                 if (info.Index == index)
 604                                         return info;
 605                         return null;
 606                 }
 607
 608                 unsafe static Win32_IP_ADAPTER_INFO [] GetAdaptersInfo ()
 609                 {
 610                         byte [] bytes = null;
 611                         int len = 0;
 612                         GetAdaptersInfo (bytes, ref len);
 613                         bytes = new byte [len];
 614                         int ret = GetAdaptersInfo (bytes, ref len);
 615
 616                         if (ret != 0)
 617                                 throw new NetworkInformationException (ret);
 618
 619                         List<Win32_IP_ADAPTER_INFO> l = new List<Win32_IP_ADAPTER_INFO> ();
 620                         fixed (byte* ptr = bytes) {
 621                                 Win32_IP_ADAPTER_INFO info;
 622                                 for (IntPtr p = (IntPtr) ptr; p != IntPtr.Zero; p = info.Next) {
 623                                         info = new Win32_IP_ADAPTER_INFO ();
 624                                         Marshal.PtrToStructure (p, info);
 625                                         l.Add (info);
 626                                 }
 627                         }
 628                         return l.ToArray ();
 629                 }
 630
 631                 unsafe static Win32_IP_ADAPTER_ADDRESSES [] GetAdaptersAddresses ()
 632                 {
 633                         byte [] bytes = null;
 634                         int len = 0;
 635                         GetAdaptersAddresses (0, 0, IntPtr.Zero, bytes, ref len);
 636                         bytes = new byte [len];
 637                         int ret = GetAdaptersAddresses (0, 0, IntPtr.Zero, bytes, ref len);
 638                         if (ret != 0)
 639                                 throw new NetworkInformationException (ret);
 640
 641                         List<Win32_IP_ADAPTER_ADDRESSES> l = new List<Win32_IP_ADAPTER_ADDRESSES> ();
 642                         fixed (byte* ptr = bytes) {
 643                                 Win32_IP_ADAPTER_ADDRESSES info;
 644                                 for (IntPtr p = (IntPtr) ptr; p != IntPtr.Zero; p = info.Next) {
 645                                         info = new Win32_IP_ADAPTER_ADDRESSES ();
 646                                         Marshal.PtrToStructure (p, info);
 647                                         l.Add (info);
 648                                 }
 649                         }
 650                         return l.ToArray ();
 651                 }
 652
 653                 Win32_IP_ADAPTER_ADDRESSES addr;
 654                 Win32_MIB_IFROW mib4, mib6;
 655                 Win32IPv4InterfaceStatistics ip4stats;
 656                 IPInterfaceProperties ip_if_props;
 657
 658                 Win32NetworkInterface2 (Win32_IP_ADAPTER_ADDRESSES addr)
 659                 {
 660                         this.addr = addr;
 661                         mib4 = default (Win32_MIB_IFROW);
 662                         mib4.Index = addr.Alignment.IfIndex;
 663                         if (GetIfEntry (ref mib4) != 0)
 664                                 mib4.Index = -1; // unavailable;
 665                         mib6 = default (Win32_MIB_IFROW);
 666                         mib6.Index = addr.Ipv6IfIndex;
 667                         if (GetIfEntry (ref mib6) != 0)
 668                                 mib6.Index = -1; // unavailable;
 669                         ip4stats = new Win32IPv4InterfaceStatistics (mib4);
 670                         ip_if_props = new Win32IPInterfaceProperties2 (addr, mib4, mib6);
 671                 }
 672
 673                 public override IPInterfaceProperties GetIPProperties ()
 674                 {
 675                         return ip_if_props;
 676                 }
 677
 678                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 679                 {
 680                         return ip4stats;
 681                 }
 682
 683                 public override PhysicalAddress GetPhysicalAddress ()
 684                 {
 685                         byte [] bytes = new byte [addr.PhysicalAddressLength];
 686                         Array.Copy (addr.PhysicalAddress, 0, bytes, 0, bytes.Length);
 687                         return new PhysicalAddress (bytes);
 688                 }
 689
 690                 public override bool Supports (NetworkInterfaceComponent networkInterfaceComponent)
 691                 {
 692                         switch (networkInterfaceComponent) {
 693                         case NetworkInterfaceComponent.IPv4:
 694                                 return mib4.Index >= 0;
 695                         case NetworkInterfaceComponent.IPv6:
 696                                 return mib6.Index >= 0;
 697                         }
 698                         return false;
 699                 }
 700
 701                 public override string Description {
 702                         get { return addr.Description; }
 703                 }
 704                 public override string Id {
 705                         get { return addr.AdapterName; }
 706                 }
 707                 public override bool IsReceiveOnly {
 708                         get { return addr.IsReceiveOnly; }
 709                 }
 710                 public override string Name {
 711                         get { return addr.FriendlyName; }
 712                 }
 713                 public override NetworkInterfaceType NetworkInterfaceType {
 714                         get { return addr.IfType; }
 715                 }
 716                 public override OperationalStatus OperationalStatus {
 717                         get { return addr.OperStatus; }
 718                 }
 719                 public override long Speed {
 720                         get { return mib6.Index >= 0 ? mib6.Speed : mib4.Speed; }
 721                 }
 722                 public override bool SupportsMulticast {
 723                         get { return !addr.NoMulticast; }
 724                 }
 725         }
 726 }
 727 #endif
 728