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)
  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                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 242                 {
 243                         var interfaces = new Dictionary <string, LinuxNetworkInterface> ();
 244                         IntPtr ifap;
 245                         if (getifaddrs (out ifap) != 0)
 246                                 throw new SystemException ("getifaddrs() failed");
 247
 248                         try {
 249                                 IntPtr next = ifap;
 250                                 while (next != IntPtr.Zero) {
 251                                         ifaddrs   addr = (ifaddrs) Marshal.PtrToStructure (next, typeof (ifaddrs));
 252                                         IPAddress address = IPAddress.None;
 253                                         string    name = addr.ifa_name;
 254                                         int       index = -1;
 255                                         byte[]    macAddress = null;
 256                                         NetworkInterfaceType type = NetworkInterfaceType.Unknown;
 257
 258                                         if (addr.ifa_addr != IntPtr.Zero) {
 259                                                 sockaddr_in sockaddr = (sockaddr_in) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_in));
 260
 261                                                 if (sockaddr.sin_family == AF_INET6) {
 262                                                         sockaddr_in6 sockaddr6 = (sockaddr_in6) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_in6));
 263                                                         address = new IPAddress (sockaddr6.sin6_addr.u6_addr8, sockaddr6.sin6_scope_id);
 264                                                 } else if (sockaddr.sin_family == AF_INET) {
 265                                                         address = new IPAddress (sockaddr.sin_addr);
 266                                                 } else if (sockaddr.sin_family == AF_PACKET) {
 267                                                         sockaddr_ll sockaddrll = (sockaddr_ll) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_ll));
 268                                                         if (((int)sockaddrll.sll_halen) > sockaddrll.sll_addr.Length){
 269                                                                 Console.Error.WriteLine ("Got a bad hardware address length for an AF_PACKET {0} {1}",
 270                                                                                          sockaddrll.sll_halen, sockaddrll.sll_addr.Length);
 271                                                                 next = addr.ifa_next;
 272                                                                 continue;
 273                                                         }
 274
 275                                                         macAddress = new byte [(int) sockaddrll.sll_halen];
 276                                                         Array.Copy (sockaddrll.sll_addr, 0, macAddress, 0, macAddress.Length);
 277                                                         index = sockaddrll.sll_ifindex;
 278
 279                                                         int hwtype = (int)sockaddrll.sll_hatype;
 280                                                         if (Enum.IsDefined (typeof (LinuxArpHardware), hwtype)) {
 281                                                                 switch ((LinuxArpHardware)hwtype) {
 282                                                                         case LinuxArpHardware.EETHER:
 283                                                                                 goto case LinuxArpHardware.ETHER;
 284
 285                                                                         case LinuxArpHardware.ETHER:
 286                                                                                 type = NetworkInterfaceType.Ethernet;
 287                                                                                 break;
 288
 289                                                                         case LinuxArpHardware.PRONET:
 290                                                                                 type = NetworkInterfaceType.TokenRing;
 291                                                                                 break;
 292
 293                                                                         case LinuxArpHardware.ATM:
 294                                                                                 type = NetworkInterfaceType.Atm;
 295                                                                                 break;
 296
 297                                                                         case LinuxArpHardware.SLIP:
 298                                                                                 type = NetworkInterfaceType.Slip;
 299                                                                                 break;
 300
 301                                                                         case LinuxArpHardware.PPP:
 302                                                                                 type = NetworkInterfaceType.Ppp;
 303                                                                                 break;
 304
 305                                                                         case LinuxArpHardware.LOOPBACK:
 306                                                                                 type = NetworkInterfaceType.Loopback;
 307                                                                                 macAddress = null;
 308                                                                                 break;
 309
 310                                                                         case LinuxArpHardware.FDDI:
 311                                                                                 type = NetworkInterfaceType.Fddi;
 312                                                                                 break;
 313
 314                                                                         case LinuxArpHardware.TUNNEL6:
 315                                                                                 goto case LinuxArpHardware.TUNNEL;
 316
 317                                                                         case LinuxArpHardware.TUNNEL:
 318                                                                                 type = NetworkInterfaceType.Tunnel;
 319                                                                                 break;
 320                                                                 }
 321                                                         }
 322                                                 }
 323                                         }
 324
 325                                         LinuxNetworkInterface iface = null;
 326
 327                                         if (!interfaces.TryGetValue (name, out iface)) {
 328                                                 iface = new LinuxNetworkInterface (name);
 329                                                 interfaces.Add (name, iface);
 330                                         }
 331
 332                                         if (!address.Equals (IPAddress.None))
 333                                                 iface.AddAddress (address);
 334
 335                                         if (macAddress != null || type == NetworkInterfaceType.Loopback) {
 336                                                 if (type == NetworkInterfaceType.Ethernet) {
 337                                                         if (Directory.Exists(iface.IfacePath + "wireless")) {
 338                                                                 type = NetworkInterfaceType.Wireless80211;
 339                                                         }
 340                                                 }
 341                                                 iface.SetLinkLayerInfo (index, macAddress, type);
 342                                         }
 343
 344                                         next = addr.ifa_next;
 345                                 }
 346                         } finally {
 347                                 freeifaddrs (ifap);
 348                         }
 349
 350                         NetworkInterface [] result = new NetworkInterface [interfaces.Count];
 351                         int x = 0;
 352                         foreach (NetworkInterface thisInterface in interfaces.Values) {
 353                                 result [x] = thisInterface;
 354                                 x++;
 355                         }
 356                         return result;
 357                 }
 358
 359                 LinuxNetworkInterface (string name)
 360                         : base (name)
 361                 {
 362                         iface_path = "/sys/class/net/" + name + "/";
 363                         iface_operstate_path = iface_path + "operstate";
 364                         iface_flags_path = iface_path + "flags";
 365                 }
 366
 367                 public override IPInterfaceProperties GetIPProperties ()
 368                 {
 369                         if (ipproperties == null)
 370                                 ipproperties = new LinuxIPInterfaceProperties (this, addresses);
 371                         return ipproperties;
 372                 }
 373
 374                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 375                 {
 376                         if (ipv4stats == null)
 377                                 ipv4stats = new LinuxIPv4InterfaceStatistics (this);
 378                         return ipv4stats;
 379                 }
 380
 381                 public override OperationalStatus OperationalStatus {
 382                         get {
 383                                 if (!Directory.Exists (iface_path))
 384                                         return OperationalStatus.Unknown;
 385
 386                                 try {
 387                                         string s = ReadLine (iface_operstate_path);
 388
 389                                         switch (s){
 390                                                 case "unknown":
 391                                                         return OperationalStatus.Unknown;
 392
 393                                                 case "notpresent":
 394                                                         return OperationalStatus.NotPresent;
 395
 396                                                 case "down":
 397                                                         return OperationalStatus.Down;
 398
 399                                                 case "lowerlayerdown":
 400                                                         return OperationalStatus.LowerLayerDown;
 401
 402                                                 case "testing":
 403                                                         return OperationalStatus.Testing;
 404
 405                                                 case "dormant":
 406                                                         return OperationalStatus.Dormant;
 407
 408                                                 case "up":
 409                                                         return OperationalStatus.Up;
 410                                         }
 411                                 } catch {
 412                                 }
 413                                 return OperationalStatus.Unknown;
 414                         }
 415                 }
 416
 417                 public override bool SupportsMulticast {
 418                         get {
 419                                 if (!Directory.Exists (iface_path))
 420                                         return false;
 421
 422                                 try {
 423                                         string s = ReadLine (iface_flags_path);
 424                                         if (s.Length > 2 && s [0] == '0' && s [1] == 'x')
 425                                                 s = s.Substring (2);
 426
 427                                         ulong f = UInt64.Parse (s, NumberStyles.HexNumber);
 428
 429                                         // Hardcoded, only useful for Linux.
 430                                         return ((f & 0x1000) == 0x1000);
 431                                 } catch {
 432                                         return false;
 433                                 }
 434                         }
 435                 }
 436         }
 437
 438         class MacOsNetworkInterface : UnixNetworkInterface
 439         {
 440                 [DllImport ("libc")]
 441                 static extern int getifaddrs (out IntPtr ifap);
 442
 443                 [DllImport ("libc")]
 444                 static extern void freeifaddrs (IntPtr ifap);
 445
 446                 const int AF_INET  = 2;
 447                 const int AF_INET6 = 30;
 448                 const int AF_LINK  = 18;
 449
 450                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 451                 {
 452                         var interfaces = new Dictionary <string, MacOsNetworkInterface> ();
 453                         IntPtr ifap;
 454                         if (getifaddrs (out ifap) != 0)
 455                                 throw new SystemException ("getifaddrs() failed");
 456
 457                         try {
 458                                 IntPtr next = ifap;
 459                                 while (next != IntPtr.Zero) {
 460                                         MacOsStructs.ifaddrs addr = (MacOsStructs.ifaddrs) Marshal.PtrToStructure (next, typeof (MacOsStructs.ifaddrs));
 461                                         IPAddress address = IPAddress.None;
 462                                         string    name = addr.ifa_name;
 463                                         int       index = -1;
 464                                         byte[]    macAddress = null;
 465                                         NetworkInterfaceType type = NetworkInterfaceType.Unknown;
 466
 467                                         if (addr.ifa_addr != IntPtr.Zero) {
 468                                                 MacOsStructs.sockaddr sockaddr = (MacOsStructs.sockaddr) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr));
 469
 470                                                 if (sockaddr.sa_family == AF_INET6) {
 471                                                         MacOsStructs.sockaddr_in6 sockaddr6 = (MacOsStructs.sockaddr_in6) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_in6));
 472                                                         address = new IPAddress (sockaddr6.sin6_addr.u6_addr8, sockaddr6.sin6_scope_id);
 473                                                 } else if (sockaddr.sa_family == AF_INET) {
 474                                                         MacOsStructs.sockaddr_in sockaddrin = (MacOsStructs.sockaddr_in) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_in));
 475                                                         address = new IPAddress (sockaddrin.sin_addr);
 476                                                 } else if (sockaddr.sa_family == AF_LINK) {
 477                                                         MacOsStructs.sockaddr_dl sockaddrdl = new MacOsStructs.sockaddr_dl ();
 478                                                         sockaddrdl.Read (addr.ifa_addr);
 479
 480                                                         macAddress = new byte [(int) sockaddrdl.sdl_alen];
 481                                                         Array.Copy (sockaddrdl.sdl_data, sockaddrdl.sdl_nlen, macAddress, 0, Math.Min (macAddress.Length, sockaddrdl.sdl_data.Length - sockaddrdl.sdl_nlen));
 482                                                         index = sockaddrdl.sdl_index;
 483
 484                                                         int hwtype = (int) sockaddrdl.sdl_type;
 485                                                         if (Enum.IsDefined (typeof (MacOsArpHardware), hwtype)) {
 486                                                                 switch ((MacOsArpHardware) hwtype) {
 487                                                                         case MacOsArpHardware.ETHER:
 488                                                                                 type = NetworkInterfaceType.Ethernet;
 489                                                                                 break;
 490
 491                                                                         case MacOsArpHardware.ATM:
 492                                                                                 type = NetworkInterfaceType.Atm;
 493                                                                                 break;
 494
 495                                                                         case MacOsArpHardware.SLIP:
 496                                                                                 type = NetworkInterfaceType.Slip;
 497                                                                                 break;
 498
 499                                                                         case MacOsArpHardware.PPP:
 500                                                                                 type = NetworkInterfaceType.Ppp;
 501                                                                                 break;
 502
 503                                                                         case MacOsArpHardware.LOOPBACK:
 504                                                                                 type = NetworkInterfaceType.Loopback;
 505                                                                                 macAddress = null;
 506                                                                                 break;
 507
 508                                                                         case MacOsArpHardware.FDDI:
 509                                                                                 type = NetworkInterfaceType.Fddi;
 510                                                                                 break;
 511                                                                 }
 512                                                         }
 513                                                 }
 514                                         }
 515
 516                                         MacOsNetworkInterface iface = null;
 517
 518                                         if (!interfaces.TryGetValue (name, out iface)) {
 519                                                 iface = new MacOsNetworkInterface (name);
 520                                                 interfaces.Add (name, iface);
 521                                         }
 522
 523                                         if (!address.Equals (IPAddress.None))
 524                                                 iface.AddAddress (address);
 525
 526                                         if (macAddress != null || type == NetworkInterfaceType.Loopback)
 527                                                 iface.SetLinkLayerInfo (index, macAddress, type);
 528
 529                                         next = addr.ifa_next;
 530                                 }
 531                         } finally {
 532                                 freeifaddrs (ifap);
 533                         }
 534
 535                         NetworkInterface [] result = new NetworkInterface [interfaces.Count];
 536                         int x = 0;
 537                         foreach (NetworkInterface thisInterface in interfaces.Values) {
 538                                 result [x] = thisInterface;
 539                                 x++;
 540                         }
 541                         return result;
 542                 }
 543
 544                 MacOsNetworkInterface (string name)
 545                         : base (name)
 546                 {
 547                 }
 548
 549                 public override IPInterfaceProperties GetIPProperties ()
 550                 {
 551                         if (ipproperties == null)
 552                                 ipproperties = new MacOsIPInterfaceProperties (this, addresses);
 553                         return ipproperties;
 554                 }
 555
 556                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 557                 {
 558                         if (ipv4stats == null)
 559                                 ipv4stats = new MacOsIPv4InterfaceStatistics (this);
 560                         return ipv4stats;
 561                 }
 562
 563                 public override OperationalStatus OperationalStatus {
 564                         get {
 565                                 return OperationalStatus.Unknown;
 566                         }
 567                 }
 568
 569                 public override bool SupportsMulticast {
 570                         get {
 571                                 return false;
 572                         }
 573                 }
 574         }
 575
 576         class Win32NetworkInterface2 : NetworkInterface
 577         {
 578                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 579                 static extern int GetAdaptersInfo (byte [] info, ref int size);
 580
 581                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 582                 static extern int GetAdaptersAddresses (uint family, uint flags, IntPtr reserved, byte [] info, ref int size);
 583
 584                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 585                 static extern int GetIfEntry (ref Win32_MIB_IFROW row);
 586
 587                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 588                 {
 589 //                      Win32_IP_ADAPTER_INFO [] ai = GetAdaptersInfo ();
 590                         Win32_IP_ADAPTER_ADDRESSES [] aa = GetAdaptersAddresses ();
 591                         NetworkInterface [] ret = new NetworkInterface [aa.Length];
 592                         for (int i = 0; i < ret.Length; i++)
 593                                 ret [i] = new Win32NetworkInterface2 (aa [i]);
 594                         return ret;
 595                 }
 596
 597                 public static Win32_IP_ADAPTER_INFO GetAdapterInfoByIndex (int index)
 598                 {
 599                         foreach (Win32_IP_ADAPTER_INFO info in GetAdaptersInfo ())
 600                                 if (info.Index == index)
 601                                         return info;
 602                         return null;
 603                 }
 604
 605                 unsafe static Win32_IP_ADAPTER_INFO [] GetAdaptersInfo ()
 606                 {
 607                         byte [] bytes = null;
 608                         int len = 0;
 609                         GetAdaptersInfo (bytes, ref len);
 610                         bytes = new byte [len];
 611                         int ret = GetAdaptersInfo (bytes, ref len);
 612
 613                         if (ret != 0)
 614                                 throw new NetworkInformationException (ret);
 615
 616                         List<Win32_IP_ADAPTER_INFO> l = new List<Win32_IP_ADAPTER_INFO> ();
 617                         fixed (byte* ptr = bytes) {
 618                                 Win32_IP_ADAPTER_INFO info;
 619                                 for (IntPtr p = (IntPtr) ptr; p != IntPtr.Zero; p = info.Next) {
 620                                         info = new Win32_IP_ADAPTER_INFO ();
 621                                         Marshal.PtrToStructure (p, info);
 622                                         l.Add (info);
 623                                 }
 624                         }
 625                         return l.ToArray ();
 626                 }
 627
 628                 unsafe static Win32_IP_ADAPTER_ADDRESSES [] GetAdaptersAddresses ()
 629                 {
 630                         byte [] bytes = null;
 631                         int len = 0;
 632                         GetAdaptersAddresses (0, 0, IntPtr.Zero, bytes, ref len);
 633                         bytes = new byte [len];
 634                         int ret = GetAdaptersAddresses (0, 0, IntPtr.Zero, bytes, ref len);
 635                         if (ret != 0)
 636                                 throw new NetworkInformationException (ret);
 637
 638                         List<Win32_IP_ADAPTER_ADDRESSES> l = new List<Win32_IP_ADAPTER_ADDRESSES> ();
 639                         fixed (byte* ptr = bytes) {
 640                                 Win32_IP_ADAPTER_ADDRESSES info;
 641                                 for (IntPtr p = (IntPtr) ptr; p != IntPtr.Zero; p = info.Next) {
 642                                         info = new Win32_IP_ADAPTER_ADDRESSES ();
 643                                         Marshal.PtrToStructure (p, info);
 644                                         l.Add (info);
 645                                 }
 646                         }
 647                         return l.ToArray ();
 648                 }
 649
 650                 Win32_IP_ADAPTER_ADDRESSES addr;
 651                 Win32_MIB_IFROW mib4, mib6;
 652                 Win32IPv4InterfaceStatistics ip4stats;
 653                 IPInterfaceProperties ip_if_props;
 654
 655                 Win32NetworkInterface2 (Win32_IP_ADAPTER_ADDRESSES addr)
 656                 {
 657                         this.addr = addr;
 658                         mib4 = default (Win32_MIB_IFROW);
 659                         mib4.Index = addr.Alignment.IfIndex;
 660                         if (GetIfEntry (ref mib4) != 0)
 661                                 mib4.Index = -1; // unavailable;
 662                         mib6 = default (Win32_MIB_IFROW);
 663                         mib6.Index = addr.Ipv6IfIndex;
 664                         if (GetIfEntry (ref mib6) != 0)
 665                                 mib6.Index = -1; // unavailable;
 666                         ip4stats = new Win32IPv4InterfaceStatistics (mib4);
 667                         ip_if_props = new Win32IPInterfaceProperties2 (addr, mib4, mib6);
 668                 }
 669
 670                 public override IPInterfaceProperties GetIPProperties ()
 671                 {
 672                         return ip_if_props;
 673                 }
 674
 675                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 676                 {
 677                         return ip4stats;
 678                 }
 679
 680                 public override PhysicalAddress GetPhysicalAddress ()
 681                 {
 682                         byte [] bytes = new byte [addr.PhysicalAddressLength];
 683                         Array.Copy (addr.PhysicalAddress, 0, bytes, 0, bytes.Length);
 684                         return new PhysicalAddress (bytes);
 685                 }
 686
 687                 public override bool Supports (NetworkInterfaceComponent networkInterfaceComponent)
 688                 {
 689                         switch (networkInterfaceComponent) {
 690                         case NetworkInterfaceComponent.IPv4:
 691                                 return mib4.Index >= 0;
 692                         case NetworkInterfaceComponent.IPv6:
 693                                 return mib6.Index >= 0;
 694                         }
 695                         return false;
 696                 }
 697
 698                 public override string Description {
 699                         get { return addr.Description; }
 700                 }
 701                 public override string Id {
 702                         get { return addr.AdapterName; }
 703                 }
 704                 public override bool IsReceiveOnly {
 705                         get { return addr.IsReceiveOnly; }
 706                 }
 707                 public override string Name {
 708                         get { return addr.FriendlyName; }
 709                 }
 710                 public override NetworkInterfaceType NetworkInterfaceType {
 711                         get { return addr.IfType; }
 712                 }
 713                 public override OperationalStatus OperationalStatus {
 714                         get { return addr.OperStatus; }
 715                 }
 716                 public override long Speed {
 717                         get { return mib6.Index >= 0 ? mib6.Speed : mib4.Speed; }
 718                 }
 719                 public override bool SupportsMulticast {
 720                         get { return !addr.NoMulticast; }
 721                 }
 722         }
 723 }
 724