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