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