mcs/class/System/System.Net.NetworkInformation/NetworkInterface.cs

   1 //
   2 // System.Net.NetworkInformation.NetworkInterface
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   6 //      Atsushi Enomoto (atsushi@ximian.com)
   7 //      Miguel de Icaza (miguel@novell.com)
   8 //      Eric Butler (eric@extremeboredom.net)
   9 //      Marek Habersack (mhabersack@novell.com)
  10 //
  11 // Copyright (c) 2006-2008 Novell, Inc. (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32 #if NET_2_0
  33 using System;
  34 using System.Collections.Generic;
  35 using System.Collections;
  36 using System.Net;
  37 using System.Net.Sockets;
  38 using System.Runtime.InteropServices;
  39 using System.Text;
  40 using System.IO;
  41 using System.Globalization;
  42
  43 namespace System.Net.NetworkInformation {
  44         public abstract class NetworkInterface {
  45                 [DllImport ("libc")]
  46                 static extern int uname (IntPtr buf);
  47
  48                 static Version windowsVer51 = new Version (5, 1);
  49                 static internal readonly bool runningOnUnix = (Environment.OSVersion.Platform == PlatformID.Unix);
  50
  51                 protected NetworkInterface ()
  52                 {
  53                 }
  54
  55                 [MonoTODO("Only works on Linux and Windows")]
  56                 public static NetworkInterface [] GetAllNetworkInterfaces ()
  57                 {
  58                         if (runningOnUnix) {
  59                                 bool darwin = false;
  60                                 IntPtr buf = Marshal.AllocHGlobal (8192);
  61                                 if (uname (buf) == 0) {
  62                                         string os = Marshal.PtrToStringAnsi (buf);
  63                                         if (os == "Darwin")
  64                                                 darwin = true;
  65                                 }
  66                                 Marshal.FreeHGlobal (buf);
  67
  68                                 try {
  69                                         if (darwin)
  70                                                 return MacOsNetworkInterface.ImplGetAllNetworkInterfaces ();
  71                                         else
  72                                                 return LinuxNetworkInterface.ImplGetAllNetworkInterfaces ();
  73                                 } catch (SystemException ex) {
  74                                         throw ex;
  75                                 } catch {
  76                                         return new NetworkInterface [0];
  77                                 }
  78                         } else {
  79                                 if (Environment.OSVersion.Version >= windowsVer51)
  80                                         return Win32NetworkInterface2.ImplGetAllNetworkInterfaces ();
  81                                 return new NetworkInterface [0];
  82                         }
  83                 }
  84
  85                 [MonoTODO("Always returns true")]
  86                 public static bool GetIsNetworkAvailable ()
  87                 {
  88                         return true;
  89                 }
  90
  91                 internal static string ReadLine (string path)
  92                 {
  93                         using (FileStream fs = File.OpenRead (path)){
  94                                 using (StreamReader sr = new StreamReader (fs)){
  95                                         return sr.ReadLine ();
  96                                 }
  97                         }
  98                 }
  99
 100                 [MonoTODO("Only works on Linux. Returns 0 on other systems.")]
 101                 public static int LoopbackInterfaceIndex {
 102                         get {
 103                                 if (runningOnUnix) {
 104                                         try {
 105                                                 return UnixNetworkInterface.IfNameToIndex ("lo");
 106                                         } catch  {
 107                                                 return 0;
 108                                         }
 109                                 } else
 110                                         return 0;
 111                         }
 112                 }
 113
 114                 public abstract IPInterfaceProperties GetIPProperties ();
 115                 public abstract IPv4InterfaceStatistics GetIPv4Statistics ();
 116                 public abstract PhysicalAddress GetPhysicalAddress ();
 117                 public abstract bool Supports (NetworkInterfaceComponent networkInterfaceComponent);
 118
 119                 public abstract string Description { get; }
 120                 public abstract string Id { get; }
 121                 public abstract bool IsReceiveOnly { get; }
 122                 public abstract string Name { get; }
 123                 public abstract NetworkInterfaceType NetworkInterfaceType { get; }
 124                 public abstract OperationalStatus OperationalStatus { get; }
 125                 public abstract long Speed { get; }
 126                 public abstract bool SupportsMulticast { get; }
 127         }
 128
 129         abstract class UnixNetworkInterface : NetworkInterface
 130         {
 131                 [DllImport("libc")]
 132                 static extern int if_nametoindex(string ifname);
 133
 134                 protected IPv4InterfaceStatistics ipv4stats;
 135                 protected IPInterfaceProperties ipproperties;
 136
 137                 string               name;
 138                 //int                  index;
 139                 protected List <IPAddress> addresses;
 140                 byte[]               macAddress;
 141                 NetworkInterfaceType type;
 142
 143                 internal UnixNetworkInterface (string name)
 144                 {
 145                         this.name = name;
 146                         addresses = new List<IPAddress> ();
 147                 }
 148
 149                 public static int IfNameToIndex (string ifname)
 150                 {
 151                         return if_nametoindex(ifname);
 152                 }
 153
 154                 internal void AddAddress (IPAddress address)
 155                 {
 156                         addresses.Add (address);
 157                 }
 158
 159                 internal void SetLinkLayerInfo (int index, byte[] macAddress, NetworkInterfaceType type)
 160                 {
 161                         //this.index = index;
 162                         this.macAddress = macAddress;
 163                         this.type = type;
 164                 }
 165
 166                 public override PhysicalAddress GetPhysicalAddress ()
 167                 {
 168                         if (macAddress != null)
 169                                 return new PhysicalAddress (macAddress);
 170                         else
 171                                 return PhysicalAddress.None;
 172                 }
 173
 174                 public override bool Supports (NetworkInterfaceComponent networkInterfaceComponent)
 175                 {
 176                         bool wantIPv4 = networkInterfaceComponent == NetworkInterfaceComponent.IPv4;
 177                         bool wantIPv6 = wantIPv4 ? false : networkInterfaceComponent == NetworkInterfaceComponent.IPv6;
 178
 179                         foreach (IPAddress address in addresses) {
 180                                 if (wantIPv4 && address.AddressFamily == AddressFamily.InterNetwork)
 181                                         return true;
 182                                 else if (wantIPv6 && address.AddressFamily == AddressFamily.InterNetworkV6)
 183                                         return true;
 184                         }
 185
 186                         return false;
 187                 }
 188
 189                 public override string Description {
 190                         get { return name; }
 191                 }
 192
 193                 public override string Id {
 194                         get { return name; }
 195                 }
 196
 197                 public override bool IsReceiveOnly {
 198                         get { return false; }
 199                 }
 200
 201                 public override string Name {
 202                         get { return name; }
 203                 }
 204
 205                 public override NetworkInterfaceType NetworkInterfaceType {
 206                         get { return type; }
 207                 }
 208
 209                 [MonoTODO ("Parse dmesg?")]
 210                 public override long Speed {
 211                         get {
 212                                 // Bits/s
 213                                 return 1000000;
 214                         }
 215                 }
 216         }
 217
 218         //
 219         // This class needs support from the libsupport.so library to fetch the
 220         // data using arch-specific ioctls.
 221         //
 222         // For this to work, we have to create this on the factory above.
 223         //
 224         class LinuxNetworkInterface : UnixNetworkInterface
 225         {
 226                 [DllImport ("libc")]
 227                 static extern int getifaddrs (out IntPtr ifap);
 228
 229                 [DllImport ("libc")]
 230                 static extern void freeifaddrs (IntPtr ifap);
 231
 232                 const int AF_INET   = 2;
 233                 const int AF_INET6  = 10;
 234                 const int AF_PACKET = 17;
 235
 236                 //NetworkInterfaceType type;
 237                 string               iface_path;
 238                 string               iface_operstate_path;
 239                 string               iface_flags_path;
 240
 241                 internal string IfacePath {
 242                         get { return iface_path; }
 243                 }
 244
 245                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 246                 {
 247                         var interfaces = new Dictionary <string, LinuxNetworkInterface> ();
 248                         IntPtr ifap;
 249                         if (getifaddrs (out ifap) != 0)
 250                                 throw new SystemException ("getifaddrs() failed");
 251
 252                         try {
 253                                 IntPtr next = ifap;
 254                                 while (next != IntPtr.Zero) {
 255                                         ifaddrs   addr = (ifaddrs) Marshal.PtrToStructure (next, typeof (ifaddrs));
 256                                         IPAddress address = IPAddress.None;
 257                                         string    name = addr.ifa_name;
 258                                         int       index = -1;
 259                                         byte[]    macAddress = null;
 260                                         NetworkInterfaceType type = NetworkInterfaceType.Unknown;
 261
 262                                         if (addr.ifa_addr != IntPtr.Zero) {
 263                                                 sockaddr_in sockaddr = (sockaddr_in) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_in));
 264
 265                                                 if (sockaddr.sin_family == AF_INET6) {
 266                                                         sockaddr_in6 sockaddr6 = (sockaddr_in6) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_in6));
 267                                                         address = new IPAddress (sockaddr6.sin6_addr.u6_addr8, sockaddr6.sin6_scope_id);
 268                                                 } else if (sockaddr.sin_family == AF_INET) {
 269                                                         address = new IPAddress (sockaddr.sin_addr);
 270                                                 } else if (sockaddr.sin_family == AF_PACKET) {
 271                                                         sockaddr_ll sockaddrll = (sockaddr_ll) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_ll));
 272                                                         if (((int)sockaddrll.sll_halen) > sockaddrll.sll_addr.Length){
 273                                                                 Console.Error.WriteLine ("Got a bad hardware address length for an AF_PACKET {0} {1}",
 274                                                                                          sockaddrll.sll_halen, sockaddrll.sll_addr.Length);
 275                                                                 continue;
 276                                                         }
 277
 278                                                         macAddress = new byte [(int) sockaddrll.sll_halen];
 279                                                         Array.Copy (sockaddrll.sll_addr, 0, macAddress, 0, macAddress.Length);
 280                                                         index = sockaddrll.sll_ifindex;
 281
 282                                                         int hwtype = (int)sockaddrll.sll_hatype;
 283                                                         if (Enum.IsDefined (typeof (LinuxArpHardware), hwtype)) {
 284                                                                 switch ((LinuxArpHardware)hwtype) {
 285                                                                         case LinuxArpHardware.EETHER:
 286                                                                                 goto case LinuxArpHardware.ETHER;
 287
 288                                                                         case LinuxArpHardware.ETHER:
 289                                                                                 type = NetworkInterfaceType.Ethernet;
 290                                                                                 break;
 291
 292                                                                         case LinuxArpHardware.PRONET:
 293                                                                                 type = NetworkInterfaceType.TokenRing;
 294                                                                                 break;
 295
 296                                                                         case LinuxArpHardware.ATM:
 297                                                                                 type = NetworkInterfaceType.Atm;
 298                                                                                 break;
 299
 300                                                                         case LinuxArpHardware.SLIP:
 301                                                                                 type = NetworkInterfaceType.Slip;
 302                                                                                 break;
 303
 304                                                                         case LinuxArpHardware.PPP:
 305                                                                                 type = NetworkInterfaceType.Ppp;
 306                                                                                 break;
 307
 308                                                                         case LinuxArpHardware.LOOPBACK:
 309                                                                                 type = NetworkInterfaceType.Loopback;
 310                                                                                 macAddress = null;
 311                                                                                 break;
 312
 313                                                                         case LinuxArpHardware.FDDI:
 314                                                                                 type = NetworkInterfaceType.Fddi;
 315                                                                                 break;
 316
 317                                                                         case LinuxArpHardware.TUNNEL6:
 318                                                                                 goto case LinuxArpHardware.TUNNEL;
 319
 320                                                                         case LinuxArpHardware.TUNNEL:
 321                                                                                 type = NetworkInterfaceType.Tunnel;
 322                                                                                 break;
 323                                                                 }
 324                                                         }
 325                                                 }
 326                                         }
 327
 328                                         LinuxNetworkInterface iface = null;
 329
 330                                         if (!interfaces.TryGetValue (name, out iface)) {
 331                                                 iface = new LinuxNetworkInterface (name);
 332                                                 interfaces.Add (name, iface);
 333                                         }
 334
 335                                         if (!address.Equals (IPAddress.None))
 336                                                 iface.AddAddress (address);
 337
 338                                         if (macAddress != null || type == NetworkInterfaceType.Loopback) {
 339                                                 if (type == NetworkInterfaceType.Ethernet) {
 340                                                         if (Directory.Exists(iface.IfacePath + "wireless")) {
 341                                                                 type = NetworkInterfaceType.Wireless80211;
 342                                                         }
 343                                                 }
 344                                                 iface.SetLinkLayerInfo (index, macAddress, type);
 345                                         }
 346
 347                                         next = addr.ifa_next;
 348                                 }
 349                         } finally {
 350                                 freeifaddrs (ifap);
 351                         }
 352
 353                         NetworkInterface [] result = new NetworkInterface [interfaces.Count];
 354                         int x = 0;
 355                         foreach (NetworkInterface thisInterface in interfaces.Values) {
 356                                 result [x] = thisInterface;
 357                                 x++;
 358                         }
 359                         return result;
 360                 }
 361
 362                 LinuxNetworkInterface (string name)
 363                         : base (name)
 364                 {
 365                         iface_path = "/sys/class/net/" + name + "/";
 366                         iface_operstate_path = iface_path + "operstate";
 367                         iface_flags_path = iface_path + "flags";
 368                 }
 369
 370                 public override IPInterfaceProperties GetIPProperties ()
 371                 {
 372                         if (ipproperties == null)
 373                                 ipproperties = new LinuxIPInterfaceProperties (this, addresses);
 374                         return ipproperties;
 375                 }
 376
 377                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 378                 {
 379                         if (ipv4stats == null)
 380                                 ipv4stats = new LinuxIPv4InterfaceStatistics (this);
 381                         return ipv4stats;
 382                 }
 383
 384                 public override OperationalStatus OperationalStatus {
 385                         get {
 386                                 if (!Directory.Exists (iface_path))
 387                                         return OperationalStatus.Unknown;
 388
 389                                 try {
 390                                         string s = ReadLine (iface_operstate_path);
 391
 392                                         switch (s){
 393                                                 case "unknown":
 394                                                         return OperationalStatus.Unknown;
 395
 396                                                 case "notpresent":
 397                                                         return OperationalStatus.NotPresent;
 398
 399                                                 case "down":
 400                                                         return OperationalStatus.Down;
 401
 402                                                 case "lowerlayerdown":
 403                                                         return OperationalStatus.LowerLayerDown;
 404
 405                                                 case "testing":
 406                                                         return OperationalStatus.Testing;
 407
 408                                                 case "dormant":
 409                                                         return OperationalStatus.Dormant;
 410
 411                                                 case "up":
 412                                                         return OperationalStatus.Up;
 413                                         }
 414                                 } catch {
 415                                 }
 416                                 return OperationalStatus.Unknown;
 417                         }
 418                 }
 419
 420                 public override bool SupportsMulticast {
 421                         get {
 422                                 if (!Directory.Exists (iface_path))
 423                                         return false;
 424
 425                                 try {
 426                                         string s = ReadLine (iface_flags_path);
 427                                         if (s.Length > 2 && s [0] == '0' && s [1] == 'x')
 428                                                 s = s.Substring (2);
 429
 430                                         ulong f = UInt64.Parse (s, NumberStyles.HexNumber);
 431
 432                                         // Hardcoded, only useful for Linux.
 433                                         return ((f & 0x1000) == 0x1000);
 434                                 } catch {
 435                                         return false;
 436                                 }
 437                         }
 438                 }
 439         }
 440
 441         class MacOsNetworkInterface : UnixNetworkInterface
 442         {
 443                 [DllImport ("libc")]
 444                 static extern int getifaddrs (out IntPtr ifap);
 445
 446                 [DllImport ("libc")]
 447                 static extern void freeifaddrs (IntPtr ifap);
 448
 449                 const int AF_INET  = 2;
 450                 const int AF_INET6 = 30;
 451                 const int AF_LINK  = 18;
 452
 453                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 454                 {
 455                         var interfaces = new Dictionary <string, MacOsNetworkInterface> ();
 456                         IntPtr ifap;
 457                         if (getifaddrs (out ifap) != 0)
 458                                 throw new SystemException ("getifaddrs() failed");
 459
 460                         try {
 461                                 IntPtr next = ifap;
 462                                 while (next != IntPtr.Zero) {
 463                                         MacOsStructs.ifaddrs addr = (MacOsStructs.ifaddrs) Marshal.PtrToStructure (next, typeof (MacOsStructs.ifaddrs));
 464                                         IPAddress address = IPAddress.None;
 465                                         string    name = addr.ifa_name;
 466                                         int       index = -1;
 467                                         byte[]    macAddress = null;
 468                                         NetworkInterfaceType type = NetworkInterfaceType.Unknown;
 469
 470                                         if (addr.ifa_addr != IntPtr.Zero) {
 471                                                 MacOsStructs.sockaddr sockaddr = (MacOsStructs.sockaddr) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr));
 472
 473                                                 if (sockaddr.sa_family == AF_INET6) {
 474                                                         MacOsStructs.sockaddr_in6 sockaddr6 = (MacOsStructs.sockaddr_in6) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_in6));
 475                                                         address = new IPAddress (sockaddr6.sin6_addr.u6_addr8, sockaddr6.sin6_scope_id);
 476                                                 } else if (sockaddr.sa_family == AF_INET) {
 477                                                         MacOsStructs.sockaddr_in sockaddrin = (MacOsStructs.sockaddr_in) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_in));
 478                                                         address = new IPAddress (sockaddrin.sin_addr);
 479                                                 } else if (sockaddr.sa_family == AF_LINK) {
 480                                                         MacOsStructs.sockaddr_dl sockaddrdl = (MacOsStructs.sockaddr_dl) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_dl));
 481
 482                                                         macAddress = new byte [(int) sockaddrdl.sdl_alen];
 483                                                         Array.Copy (sockaddrdl.sdl_data, sockaddrdl.sdl_nlen, macAddress, 0, macAddress.Length);
 484                                                         index = sockaddrdl.sdl_index;
 485
 486                                                         int hwtype = (int) sockaddrdl.sdl_type;
 487                                                         if (Enum.IsDefined (typeof (MacOsArpHardware), hwtype)) {
 488                                                                 switch ((MacOsArpHardware) hwtype) {
 489                                                                         case MacOsArpHardware.ETHER:
 490                                                                                 type = NetworkInterfaceType.Ethernet;
 491                                                                                 break;
 492
 493                                                                         case MacOsArpHardware.ATM:
 494                                                                                 type = NetworkInterfaceType.Atm;
 495                                                                                 break;
 496
 497                                                                         case MacOsArpHardware.SLIP:
 498                                                                                 type = NetworkInterfaceType.Slip;
 499                                                                                 break;
 500
 501                                                                         case MacOsArpHardware.PPP:
 502                                                                                 type = NetworkInterfaceType.Ppp;
 503                                                                                 break;
 504
 505                                                                         case MacOsArpHardware.LOOPBACK:
 506                                                                                 type = NetworkInterfaceType.Loopback;
 507                                                                                 macAddress = null;
 508                                                                                 break;
 509
 510                                                                         case MacOsArpHardware.FDDI:
 511                                                                                 type = NetworkInterfaceType.Fddi;
 512                                                                                 break;
 513                                                                 }
 514                                                         }
 515                                                 }
 516                                         }
 517
 518                                         MacOsNetworkInterface iface = null;
 519
 520                                         if (!interfaces.TryGetValue (name, out iface)) {
 521                                                 iface = new MacOsNetworkInterface (name);
 522                                                 interfaces.Add (name, iface);
 523                                         }
 524
 525                                         if (!address.Equals (IPAddress.None))
 526                                                 iface.AddAddress (address);
 527
 528                                         if (macAddress != null || type == NetworkInterfaceType.Loopback)
 529                                                 iface.SetLinkLayerInfo (index, macAddress, type);
 530
 531                                         next = addr.ifa_next;
 532                                 }
 533                         } finally {
 534                                 freeifaddrs (ifap);
 535                         }
 536
 537                         NetworkInterface [] result = new NetworkInterface [interfaces.Count];
 538                         int x = 0;
 539                         foreach (NetworkInterface thisInterface in interfaces.Values) {
 540                                 result [x] = thisInterface;
 541                                 x++;
 542                         }
 543                         return result;
 544                 }
 545
 546                 MacOsNetworkInterface (string name)
 547                         : base (name)
 548                 {
 549                 }
 550
 551                 public override IPInterfaceProperties GetIPProperties ()
 552                 {
 553                         if (ipproperties == null)
 554                                 ipproperties = new MacOsIPInterfaceProperties (this, addresses);
 555                         return ipproperties;
 556                 }
 557
 558                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 559                 {
 560                         if (ipv4stats == null)
 561                                 ipv4stats = new MacOsIPv4InterfaceStatistics (this);
 562                         return ipv4stats;
 563                 }
 564
 565                 public override OperationalStatus OperationalStatus {
 566                         get {
 567                                 return OperationalStatus.Unknown;
 568                         }
 569                 }
 570
 571                 public override bool SupportsMulticast {
 572                         get {
 573                                 return false;
 574                         }
 575                 }
 576         }
 577
 578         class Win32NetworkInterface2 : NetworkInterface
 579         {
 580                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 581                 static extern int GetAdaptersInfo (byte [] info, ref int size);
 582
 583                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 584                 static extern int GetAdaptersAddresses (uint family, uint flags, IntPtr reserved, byte [] info, ref int size);
 585
 586                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 587                 static extern int GetIfEntry (ref Win32_MIB_IFROW row);
 588
 589                 public static NetworkInterface [] ImplGetAllNetworkInterfaces ()
 590                 {
 591 //                      Win32_IP_ADAPTER_INFO [] ai = GetAdaptersInfo ();
 592                         Win32_IP_ADAPTER_ADDRESSES [] aa = GetAdaptersAddresses ();
 593                         NetworkInterface [] ret = new NetworkInterface [aa.Length];
 594                         for (int i = 0; i < ret.Length; i++)
 595                                 ret [i] = new Win32NetworkInterface2 (aa [i]);
 596                         return ret;
 597                 }
 598
 599                 public static Win32_IP_ADAPTER_INFO GetAdapterInfoByIndex (int index)
 600                 {
 601                         foreach (Win32_IP_ADAPTER_INFO info in GetAdaptersInfo ())
 602                                 if (info.Index == index)
 603                                         return info;
 604                         return null;
 605                 }
 606
 607                 unsafe static Win32_IP_ADAPTER_INFO [] GetAdaptersInfo ()
 608                 {
 609                         byte [] bytes = null;
 610                         int len = 0;
 611                         GetAdaptersInfo (bytes, ref len);
 612                         bytes = new byte [len];
 613                         int ret = GetAdaptersInfo (bytes, ref len);
 614
 615                         if (ret != 0)
 616                                 throw new NetworkInformationException (ret);
 617
 618                         List<Win32_IP_ADAPTER_INFO> l = new List<Win32_IP_ADAPTER_INFO> ();
 619                         fixed (byte* ptr = bytes) {
 620                                 Win32_IP_ADAPTER_INFO info;
 621                                 for (IntPtr p = (IntPtr) ptr; p != IntPtr.Zero; p = info.Next) {
 622                                         info = new Win32_IP_ADAPTER_INFO ();
 623                                         Marshal.PtrToStructure (p, info);
 624                                         l.Add (info);
 625                                 }
 626                         }
 627                         return l.ToArray ();
 628                 }
 629
 630                 unsafe static Win32_IP_ADAPTER_ADDRESSES [] GetAdaptersAddresses ()
 631                 {
 632                         byte [] bytes = null;
 633                         int len = 0;
 634                         GetAdaptersAddresses (0, 0, IntPtr.Zero, bytes, ref len);
 635                         bytes = new byte [len];
 636                         int ret = GetAdaptersAddresses (0, 0, IntPtr.Zero, bytes, ref len);
 637                         if (ret != 0)
 638                                 throw new NetworkInformationException (ret);
 639
 640                         List<Win32_IP_ADAPTER_ADDRESSES> l = new List<Win32_IP_ADAPTER_ADDRESSES> ();
 641                         fixed (byte* ptr = bytes) {
 642                                 Win32_IP_ADAPTER_ADDRESSES info;
 643                                 for (IntPtr p = (IntPtr) ptr; p != IntPtr.Zero; p = info.Next) {
 644                                         info = new Win32_IP_ADAPTER_ADDRESSES ();
 645                                         Marshal.PtrToStructure (p, info);
 646                                         l.Add (info);
 647                                 }
 648                         }
 649                         return l.ToArray ();
 650                 }
 651
 652                 Win32_IP_ADAPTER_ADDRESSES addr;
 653                 Win32_MIB_IFROW mib4, mib6;
 654                 Win32IPv4InterfaceStatistics ip4stats;
 655                 IPInterfaceProperties ip_if_props;
 656
 657                 Win32NetworkInterface2 (Win32_IP_ADAPTER_ADDRESSES addr)
 658                 {
 659                         this.addr = addr;
 660                         mib4 = default (Win32_MIB_IFROW);
 661                         mib4.Index = addr.Alignment.IfIndex;
 662                         if (GetIfEntry (ref mib4) != 0)
 663                                 mib4.Index = -1; // unavailable;
 664                         mib6 = default (Win32_MIB_IFROW);
 665                         mib6.Index = addr.Ipv6IfIndex;
 666                         if (GetIfEntry (ref mib6) != 0)
 667                                 mib6.Index = -1; // unavailable;
 668                         ip4stats = new Win32IPv4InterfaceStatistics (mib4);
 669                         ip_if_props = new Win32IPInterfaceProperties2 (addr, mib4, mib6);
 670                 }
 671
 672                 public override IPInterfaceProperties GetIPProperties ()
 673                 {
 674                         return ip_if_props;
 675                 }
 676
 677                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 678                 {
 679                         return ip4stats;
 680                 }
 681
 682                 public override PhysicalAddress GetPhysicalAddress ()
 683                 {
 684                         byte [] bytes = new byte [addr.PhysicalAddressLength];
 685                         Array.Copy (addr.PhysicalAddress, 0, bytes, 0, bytes.Length);
 686                         return new PhysicalAddress (bytes);
 687                 }
 688
 689                 public override bool Supports (NetworkInterfaceComponent networkInterfaceComponent)
 690                 {
 691                         switch (networkInterfaceComponent) {
 692                         case NetworkInterfaceComponent.IPv4:
 693                                 return mib4.Index >= 0;
 694                         case NetworkInterfaceComponent.IPv6:
 695                                 return mib6.Index >= 0;
 696                         }
 697                         return false;
 698                 }
 699
 700                 public override string Description {
 701                         get { return addr.Description; }
 702                 }
 703                 public override string Id {
 704                         get { return addr.AdapterName; }
 705                 }
 706                 public override bool IsReceiveOnly {
 707                         get { return addr.IsReceiveOnly; }
 708                 }
 709                 public override string Name {
 710                         get { return addr.FriendlyName; }
 711                 }
 712                 public override NetworkInterfaceType NetworkInterfaceType {
 713                         get { return addr.IfType; }
 714                 }
 715                 public override OperationalStatus OperationalStatus {
 716                         get { return addr.OperStatus; }
 717                 }
 718                 public override long Speed {
 719                         get { return mib6.Index >= 0 ? mib6.Speed : mib4.Speed; }
 720                 }
 721                 public override bool SupportsMulticast {
 722                         get { return !addr.NoMulticast; }
 723                 }
 724         }
 725 }
 726 #endif
 727