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 //  Marek Safar (marek.safar@gmail.com)
  11 //
  12 // Copyright (c) 2006-2008 Novell, Inc. (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  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
  46                 static readonly NetworkInterfaceFactory nif = NetworkInterfaceFactory.Create ();
  47
  48                 protected NetworkInterface ()
  49                 {
  50                 }
  51
  52                 public static NetworkInterface [] GetAllNetworkInterfaces ()
  53                 {
  54                         try {
  55                                 return nif.GetAllNetworkInterfaces ();
  56                         } catch {
  57                                 return new NetworkInterface [0];
  58                         }
  59                 }
  60
  61                 [MonoTODO("Always returns true")]
  62                 public static bool GetIsNetworkAvailable ()
  63                 {
  64                         return true;
  65                 }
  66
  67                 public static int LoopbackInterfaceIndex {
  68                         get {
  69                                 return nif.GetLoopbackInterfaceIndex ();
  70                         }
  71                 }
  72
  73                 public abstract IPInterfaceProperties GetIPProperties ();
  74                 public abstract IPv4InterfaceStatistics GetIPv4Statistics ();
  75                 public abstract PhysicalAddress GetPhysicalAddress ();
  76                 public abstract bool Supports (NetworkInterfaceComponent networkInterfaceComponent);
  77
  78                 public abstract string Description { get; }
  79                 public abstract string Id { get; }
  80                 public abstract bool IsReceiveOnly { get; }
  81                 public abstract string Name { get; }
  82                 public abstract NetworkInterfaceType NetworkInterfaceType { get; }
  83                 public abstract OperationalStatus OperationalStatus { get; }
  84                 public abstract long Speed { get; }
  85                 public abstract bool SupportsMulticast { get; }
  86         }
  87
  88         abstract class NetworkInterfaceFactory
  89         {
  90                 internal abstract class UnixNetworkInterfaceAPI : NetworkInterfaceFactory
  91                 {
  92                         [DllImport("libc")]
  93                         public static extern int if_nametoindex(string ifname);
  94
  95                         [DllImport ("libc")]
  96                         protected static extern int getifaddrs (out IntPtr ifap);
  97
  98                         [DllImport ("libc")]
  99                         protected static extern void freeifaddrs (IntPtr ifap);
 100                 }
 101
 102                 class MacOsNetworkInterfaceAPI : UnixNetworkInterfaceAPI
 103                 {
 104                         public override NetworkInterface [] GetAllNetworkInterfaces ()
 105                         {
 106                                 const int AF_INET  = 2;
 107                                 const int AF_INET6 = 30;
 108                                 const int AF_LINK  = 18;
 109
 110                                 var interfaces = new Dictionary <string, MacOsNetworkInterface> ();
 111                                 IntPtr ifap;
 112                                 if (getifaddrs (out ifap) != 0)
 113                                         throw new SystemException ("getifaddrs() failed");
 114
 115                                 try {
 116                                         IntPtr next = ifap;
 117                                         while (next != IntPtr.Zero) {
 118                                                 MacOsStructs.ifaddrs addr = (MacOsStructs.ifaddrs) Marshal.PtrToStructure (next, typeof (MacOsStructs.ifaddrs));
 119                                                 IPAddress address = IPAddress.None;
 120                                                 string    name = addr.ifa_name;
 121                                                 int       index = -1;
 122                                                 byte[]    macAddress = null;
 123                                                 NetworkInterfaceType type = NetworkInterfaceType.Unknown;
 124
 125                                                 if (addr.ifa_addr != IntPtr.Zero) {
 126                                                         // optain IPAddress
 127                                                         MacOsStructs.sockaddr sockaddr = (MacOsStructs.sockaddr) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr));
 128
 129                                                         if (sockaddr.sa_family == AF_INET6) {
 130                                                                 MacOsStructs.sockaddr_in6 sockaddr6 = (MacOsStructs.sockaddr_in6) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_in6));
 131                                                                 address = new IPAddress (sockaddr6.sin6_addr.u6_addr8, sockaddr6.sin6_scope_id);
 132                                                         } else if (sockaddr.sa_family == AF_INET) {
 133                                                                 MacOsStructs.sockaddr_in sockaddrin = (MacOsStructs.sockaddr_in) Marshal.PtrToStructure (addr.ifa_addr, typeof (MacOsStructs.sockaddr_in));
 134                                                                 address = new IPAddress (sockaddrin.sin_addr);
 135                                                         } else if (sockaddr.sa_family == AF_LINK) {
 136                                                                 MacOsStructs.sockaddr_dl sockaddrdl = new MacOsStructs.sockaddr_dl ();
 137                                                                 sockaddrdl.Read (addr.ifa_addr);
 138
 139                                                                 macAddress = new byte [(int) sockaddrdl.sdl_alen];
 140                                                                 // copy mac address from sdl_data field starting at last index pos of interface name into array macaddress, starting
 141                                                                 // at index 0
 142                                                                 Array.Copy (sockaddrdl.sdl_data, sockaddrdl.sdl_nlen, macAddress, 0, Math.Min (macAddress.Length, sockaddrdl.sdl_data.Length - sockaddrdl.sdl_nlen));
 143
 144                                                                 index = sockaddrdl.sdl_index;
 145
 146                                                                 int hwtype = (int) sockaddrdl.sdl_type;
 147                                                                 if (Enum.IsDefined (typeof (MacOsArpHardware), hwtype)) {
 148                                                                         switch ((MacOsArpHardware) hwtype) {
 149                                                                                 case MacOsArpHardware.ETHER:
 150                                                                                         type = NetworkInterfaceType.Ethernet;
 151                                                                                         break;
 152
 153                                                                                 case MacOsArpHardware.ATM:
 154                                                                                         type = NetworkInterfaceType.Atm;
 155                                                                                         break;
 156
 157                                                                                 case MacOsArpHardware.SLIP:
 158                                                                                         type = NetworkInterfaceType.Slip;
 159                                                                                         break;
 160
 161                                                                                 case MacOsArpHardware.PPP:
 162                                                                                         type = NetworkInterfaceType.Ppp;
 163                                                                                         break;
 164
 165                                                                                 case MacOsArpHardware.LOOPBACK:
 166                                                                                         type = NetworkInterfaceType.Loopback;
 167                                                                                         macAddress = null;
 168                                                                                         break;
 169
 170                                                                                 case MacOsArpHardware.FDDI:
 171                                                                                         type = NetworkInterfaceType.Fddi;
 172                                                                                         break;
 173                                                                         }
 174                                                                 }
 175                                                         }
 176                                                 }
 177
 178                                                 MacOsNetworkInterface iface = null;
 179
 180                                                 // create interface if not already present
 181                                                 if (!interfaces.TryGetValue (name, out iface)) {
 182                                                         iface = new MacOsNetworkInterface (name, addr.ifa_flags);
 183                                                         interfaces.Add (name, iface);
 184                                                 }
 185
 186                                                 // if a new address has been found, add it
 187                                                 if (!address.Equals (IPAddress.None))
 188                                                         iface.AddAddress (address);
 189
 190                                                 // set link layer info, if iface has macaddress or is loopback device
 191                                                 if (macAddress != null || type == NetworkInterfaceType.Loopback)
 192                                                         iface.SetLinkLayerInfo (index, macAddress, type);
 193
 194                                                 next = addr.ifa_next;
 195                                         }
 196                                 } finally {
 197                                         freeifaddrs (ifap);
 198                                 }
 199
 200                                 NetworkInterface [] result = new NetworkInterface [interfaces.Count];
 201                                 int x = 0;
 202                                 foreach (NetworkInterface thisInterface in interfaces.Values) {
 203                                         result [x] = thisInterface;
 204                                         x++;
 205                                 }
 206                                 return result;
 207                         }
 208
 209                         public override int GetLoopbackInterfaceIndex ()
 210                         {
 211                                 return if_nametoindex ("lo0");
 212                         }
 213                 }
 214
 215                 class LinuxNetworkInterfaceAPI : UnixNetworkInterfaceAPI
 216                 {
 217                         static void FreeInterfaceAddresses (IntPtr ifap)
 218                         {
 219 #if MONODROID
 220                                 AndroidPlatform.FreeInterfaceAddresses (ifap);
 221 #else
 222                                 freeifaddrs (ifap);
 223 #endif
 224                         }
 225
 226                         static int GetInterfaceAddresses (out IntPtr ifap)
 227                         {
 228 #if MONODROID
 229                                 return AndroidPlatform.GetInterfaceAddresses (out ifap);
 230 #else
 231                                 return getifaddrs (out ifap);
 232 #endif
 233                         }
 234
 235                         public override NetworkInterface [] GetAllNetworkInterfaces ()
 236                         {
 237                                 const int AF_INET   = 2;
 238                                 const int AF_INET6  = 10;
 239                                 const int AF_PACKET = 17;
 240
 241                                 var interfaces = new Dictionary <string, LinuxNetworkInterface> ();
 242                                 IntPtr ifap;
 243                                 if (GetInterfaceAddresses (out ifap) != 0)
 244                                         throw new SystemException ("getifaddrs() failed");
 245
 246                                 try {
 247                                         IntPtr next = ifap;
 248                                         while (next != IntPtr.Zero) {
 249                                                 ifaddrs   addr = (ifaddrs) Marshal.PtrToStructure (next, typeof (ifaddrs));
 250                                                 IPAddress address = IPAddress.None;
 251                                                 string    name = addr.ifa_name;
 252                                                 int       index = -1;
 253                                                 byte[]    macAddress = null;
 254                                                 NetworkInterfaceType type = NetworkInterfaceType.Unknown;
 255                                                 int       nullNameCount = 0;
 256
 257                                                 if (addr.ifa_addr != IntPtr.Zero) {
 258                                                         sockaddr_in sockaddr = (sockaddr_in) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_in));
 259
 260                                                         if (sockaddr.sin_family == AF_INET6) {
 261                                                                 sockaddr_in6 sockaddr6 = (sockaddr_in6) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_in6));
 262                                                                 address = new IPAddress (sockaddr6.sin6_addr.u6_addr8, sockaddr6.sin6_scope_id);
 263                                                         } else if (sockaddr.sin_family == AF_INET) {
 264                                                                 address = new IPAddress (sockaddr.sin_addr);
 265                                                         } else if (sockaddr.sin_family == AF_PACKET) {
 266                                                                 sockaddr_ll sockaddrll = (sockaddr_ll) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_ll));
 267                                                                 if (((int)sockaddrll.sll_halen) > sockaddrll.sll_addr.Length){
 268                                                                         Console.Error.WriteLine ("Got a bad hardware address length for an AF_PACKET {0} {1}",
 269                                                                                                  sockaddrll.sll_halen, sockaddrll.sll_addr.Length);
 270                                                                         next = addr.ifa_next;
 271                                                                         continue;
 272                                                                 }
 273
 274                                                                 macAddress = new byte [(int) sockaddrll.sll_halen];
 275                                                                 Array.Copy (sockaddrll.sll_addr, 0, macAddress, 0, macAddress.Length);
 276                                                                 index = sockaddrll.sll_ifindex;
 277
 278                                                                 int hwtype = (int)sockaddrll.sll_hatype;
 279                                                                 if (Enum.IsDefined (typeof (LinuxArpHardware), hwtype)) {
 280                                                                         switch ((LinuxArpHardware)hwtype) {
 281                                                                                 case LinuxArpHardware.EETHER:
 282                                                                                         goto case LinuxArpHardware.ETHER;
 283
 284                                                                                 case LinuxArpHardware.ETHER:
 285                                                                                         type = NetworkInterfaceType.Ethernet;
 286                                                                                         break;
 287
 288                                                                                 case LinuxArpHardware.PRONET:
 289                                                                                         type = NetworkInterfaceType.TokenRing;
 290                                                                                         break;
 291
 292                                                                                 case LinuxArpHardware.ATM:
 293                                                                                         type = NetworkInterfaceType.Atm;
 294                                                                                         break;
 295
 296                                                                                 case LinuxArpHardware.SLIP:
 297                                                                                 case LinuxArpHardware.CSLIP:
 298                                                                                 case LinuxArpHardware.SLIP6:
 299                                                                                 case LinuxArpHardware.CSLIP6:
 300                                                                                         type = NetworkInterfaceType.Slip;
 301                                                                                         break;
 302
 303                                                                                 case LinuxArpHardware.PPP:
 304                                                                                         type = NetworkInterfaceType.Ppp;
 305                                                                                         break;
 306
 307                                                                                 case LinuxArpHardware.LOOPBACK:
 308                                                                                         type = NetworkInterfaceType.Loopback;
 309                                                                                         macAddress = null;
 310                                                                                         break;
 311
 312                                                                                 case LinuxArpHardware.FDDI:
 313                                                                                         type = NetworkInterfaceType.Fddi;
 314                                                                                         break;
 315
 316                                                                                 case LinuxArpHardware.SIT:
 317                                                                                 case LinuxArpHardware.IPDDP:
 318                                                                                 case LinuxArpHardware.IPGRE:
 319                                                                                 case LinuxArpHardware.IP6GRE:
 320                                                                                 case LinuxArpHardware.TUNNEL6:
 321                                                                                 case LinuxArpHardware.TUNNEL:
 322                                                                                         type = NetworkInterfaceType.Tunnel;
 323                                                                                         break;
 324                                                                         }
 325                                                                 }
 326                                                         }
 327                                                 }
 328
 329                                                 LinuxNetworkInterface iface = null;
 330
 331                                                 if (String.IsNullOrEmpty (name))
 332                                                         name = "\0" + (++nullNameCount).ToString ();
 333
 334                                                 if (!interfaces.TryGetValue (name, out iface)) {
 335                                                         iface = new LinuxNetworkInterface (name);
 336                                                         interfaces.Add (name, iface);
 337                                                 }
 338
 339                                                 if (!address.Equals (IPAddress.None))
 340                                                         iface.AddAddress (address);
 341
 342                                                 if (macAddress != null || type == NetworkInterfaceType.Loopback) {
 343                                                         if (type == NetworkInterfaceType.Ethernet) {
 344                                                                 if (Directory.Exists(iface.IfacePath + "wireless")) {
 345                                                                         type = NetworkInterfaceType.Wireless80211;
 346                                                                 }
 347                                                         }
 348                                                         iface.SetLinkLayerInfo (index, macAddress, type);
 349                                                 }
 350
 351                                                 next = addr.ifa_next;
 352                                         }
 353                                 } finally {
 354                                         FreeInterfaceAddresses (ifap);
 355                                 }
 356
 357                                 NetworkInterface [] result = new NetworkInterface [interfaces.Count];
 358                                 int x = 0;
 359                                 foreach (NetworkInterface thisInterface in interfaces.Values) {
 360                                         result [x] = thisInterface;
 361                                         x++;
 362                                 }
 363                                 return result;
 364                         }
 365
 366                         public override int GetLoopbackInterfaceIndex ()
 367                         {
 368                                 return if_nametoindex ("lo");
 369                         }
 370                 }
 371
 372                 class Win32NetworkInterfaceAPI : NetworkInterfaceFactory
 373                 {
 374                         [DllImport ("iphlpapi.dll", SetLastError = true)]
 375                         static extern int GetAdaptersAddresses (uint family, uint flags, IntPtr reserved, byte [] info, ref int size);
 376
 377                         unsafe static Win32_IP_ADAPTER_ADDRESSES [] GetAdaptersAddresses ()
 378                         {
 379                                 byte [] bytes = null;
 380                                 int len = 0;
 381                                 GetAdaptersAddresses (0, 0, IntPtr.Zero, bytes, ref len);
 382                                 bytes = new byte [len];
 383                                 int ret = GetAdaptersAddresses (0, 0, IntPtr.Zero, bytes, ref len);
 384                                 if (ret != 0)
 385                                         throw new NetworkInformationException (ret);
 386
 387                                 List<Win32_IP_ADAPTER_ADDRESSES> l = new List<Win32_IP_ADAPTER_ADDRESSES> ();
 388                                 fixed (byte* ptr = bytes) {
 389                                         Win32_IP_ADAPTER_ADDRESSES info;
 390                                         for (IntPtr p = (IntPtr) ptr; p != IntPtr.Zero; p = info.Next) {
 391                                                 info = new Win32_IP_ADAPTER_ADDRESSES ();
 392                                                 Marshal.PtrToStructure (p, info);
 393                                                 l.Add (info);
 394                                         }
 395                                 }
 396                                 return l.ToArray ();
 397                         }
 398
 399                         public override NetworkInterface [] GetAllNetworkInterfaces ()
 400                         {
 401         //                      Win32_IP_ADAPTER_INFO [] ai = GetAdaptersInfo ();
 402                                 Win32_IP_ADAPTER_ADDRESSES [] aa = GetAdaptersAddresses ();
 403                                 NetworkInterface [] ret = new NetworkInterface [aa.Length];
 404                                 for (int i = 0; i < ret.Length; i++)
 405                                         ret [i] = new Win32NetworkInterface2 (aa [i]);
 406                                 return ret;
 407                         }
 408
 409                         public override int GetLoopbackInterfaceIndex ()
 410                         {
 411                                 throw new NotImplementedException ();
 412                         }
 413                 }
 414
 415                 public abstract NetworkInterface [] GetAllNetworkInterfaces ();
 416                 public abstract int GetLoopbackInterfaceIndex ();
 417
 418                 public static NetworkInterfaceFactory Create ()
 419                 {
 420 #if MONOTOUCH
 421                         return new MacOsNetworkInterfaceAPI ();
 422 #else
 423                         Version windowsVer51 = new Version (5, 1);
 424                         bool runningOnUnix = (Environment.OSVersion.Platform == PlatformID.Unix);
 425
 426                         if (runningOnUnix) {
 427                                 if (Platform.IsMacOS || Platform.IsFreeBSD)
 428                                         return new MacOsNetworkInterfaceAPI ();
 429
 430                                 return new LinuxNetworkInterfaceAPI ();
 431                         }
 432
 433                         if (Environment.OSVersion.Version >= windowsVer51)
 434                                 return new Win32NetworkInterfaceAPI ();
 435
 436                         throw new NotImplementedException ();
 437 #endif
 438                 }
 439         }
 440
 441         abstract class UnixNetworkInterface : NetworkInterface
 442         {
 443
 444                 protected IPv4InterfaceStatistics ipv4stats;
 445                 protected IPInterfaceProperties ipproperties;
 446
 447                 string               name;
 448                 //int                  index;
 449                 protected List <IPAddress> addresses;
 450                 byte[]               macAddress;
 451                 NetworkInterfaceType type;
 452
 453                 internal UnixNetworkInterface (string name)
 454                 {
 455                         this.name = name;
 456                         addresses = new List<IPAddress> ();
 457                 }
 458
 459                 internal void AddAddress (IPAddress address)
 460                 {
 461                         addresses.Add (address);
 462                 }
 463
 464                 internal void SetLinkLayerInfo (int index, byte[] macAddress, NetworkInterfaceType type)
 465                 {
 466                         //this.index = index;
 467                         this.macAddress = macAddress;
 468                         this.type = type;
 469                 }
 470
 471                 public override PhysicalAddress GetPhysicalAddress ()
 472                 {
 473                         if (macAddress != null)
 474                                 return new PhysicalAddress (macAddress);
 475                         else
 476                                 return PhysicalAddress.None;
 477                 }
 478
 479                 public override bool Supports (NetworkInterfaceComponent networkInterfaceComponent)
 480                 {
 481                         bool wantIPv4 = networkInterfaceComponent == NetworkInterfaceComponent.IPv4;
 482                         bool wantIPv6 = wantIPv4 ? false : networkInterfaceComponent == NetworkInterfaceComponent.IPv6;
 483
 484                         foreach (IPAddress address in addresses) {
 485                                 if (wantIPv4 && address.AddressFamily == AddressFamily.InterNetwork)
 486                                         return true;
 487                                 else if (wantIPv6 && address.AddressFamily == AddressFamily.InterNetworkV6)
 488                                         return true;
 489                         }
 490
 491                         return false;
 492                 }
 493
 494                 public override string Description {
 495                         get { return name; }
 496                 }
 497
 498                 public override string Id {
 499                         get { return name; }
 500                 }
 501
 502                 public override bool IsReceiveOnly {
 503                         get { return false; }
 504                 }
 505
 506                 public override string Name {
 507                         get { return name; }
 508                 }
 509
 510                 public override NetworkInterfaceType NetworkInterfaceType {
 511                         get { return type; }
 512                 }
 513
 514                 [MonoTODO ("Parse dmesg?")]
 515                 public override long Speed {
 516                         get {
 517                                 // Bits/s
 518                                 return 1000000;
 519                         }
 520                 }
 521
 522                 internal int NameIndex {
 523                         get {
 524                                 return NetworkInterfaceFactory.UnixNetworkInterfaceAPI.if_nametoindex (Name);
 525                         }
 526                 }
 527         }
 528
 529         //
 530         // This class needs support from the libsupport.so library to fetch the
 531         // data using arch-specific ioctls.
 532         //
 533         // For this to work, we have to create this on the factory above.
 534         //
 535         sealed class LinuxNetworkInterface : UnixNetworkInterface
 536         {
 537                 //NetworkInterfaceType type;
 538                 string               iface_path;
 539                 string               iface_operstate_path;
 540                 string               iface_flags_path;
 541
 542                 internal string IfacePath {
 543                         get { return iface_path; }
 544                 }
 545
 546                 internal LinuxNetworkInterface (string name)
 547                         : base (name)
 548                 {
 549                         iface_path = "/sys/class/net/" + name + "/";
 550                         iface_operstate_path = iface_path + "operstate";
 551                         iface_flags_path = iface_path + "flags";
 552                 }
 553
 554                 public override IPInterfaceProperties GetIPProperties ()
 555                 {
 556                         if (ipproperties == null)
 557                                 ipproperties = new LinuxIPInterfaceProperties (this, addresses);
 558                         return ipproperties;
 559                 }
 560
 561                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 562                 {
 563                         if (ipv4stats == null)
 564                                 ipv4stats = new LinuxIPv4InterfaceStatistics (this);
 565                         return ipv4stats;
 566                 }
 567
 568                 public override OperationalStatus OperationalStatus {
 569                         get {
 570                                 if (!Directory.Exists (iface_path))
 571                                         return OperationalStatus.Unknown;
 572
 573                                 try {
 574                                         string s = ReadLine (iface_operstate_path);
 575
 576                                         switch (s){
 577                                                 case "unknown":
 578                                                         return OperationalStatus.Unknown;
 579
 580                                                 case "notpresent":
 581                                                         return OperationalStatus.NotPresent;
 582
 583                                                 case "down":
 584                                                         return OperationalStatus.Down;
 585
 586                                                 case "lowerlayerdown":
 587                                                         return OperationalStatus.LowerLayerDown;
 588
 589                                                 case "testing":
 590                                                         return OperationalStatus.Testing;
 591
 592                                                 case "dormant":
 593                                                         return OperationalStatus.Dormant;
 594
 595                                                 case "up":
 596                                                         return OperationalStatus.Up;
 597                                         }
 598                                 } catch {
 599                                 }
 600                                 return OperationalStatus.Unknown;
 601                         }
 602                 }
 603
 604                 public override bool SupportsMulticast {
 605                         get {
 606                                 if (!Directory.Exists (iface_path))
 607                                         return false;
 608
 609                                 try {
 610                                         string s = ReadLine (iface_flags_path);
 611                                         if (s.Length > 2 && s [0] == '0' && s [1] == 'x')
 612                                                 s = s.Substring (2);
 613
 614                                         ulong f = UInt64.Parse (s, NumberStyles.HexNumber);
 615
 616                                         // Hardcoded, only useful for Linux.
 617                                         return ((f & 0x1000) == 0x1000);
 618                                 } catch {
 619                                         return false;
 620                                 }
 621                         }
 622                 }
 623
 624                 internal static string ReadLine (string path)
 625                 {
 626                         using (FileStream fs = File.OpenRead (path)){
 627                                 using (StreamReader sr = new StreamReader (fs)){
 628                                         return sr.ReadLine ();
 629                                 }
 630                         }
 631                 }
 632         }
 633
 634         sealed class MacOsNetworkInterface : UnixNetworkInterface
 635         {
 636                 private uint _ifa_flags;
 637
 638                 internal MacOsNetworkInterface (string name, uint ifa_flags)
 639                         : base (name)
 640                 {
 641                         _ifa_flags = ifa_flags;
 642                 }
 643
 644                 public override IPInterfaceProperties GetIPProperties ()
 645                 {
 646                         if (ipproperties == null)
 647                                 ipproperties = new MacOsIPInterfaceProperties (this, addresses);
 648                         return ipproperties;
 649                 }
 650
 651                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 652                 {
 653                         if (ipv4stats == null)
 654                                 ipv4stats = new MacOsIPv4InterfaceStatistics (this);
 655                         return ipv4stats;
 656                 }
 657
 658                 public override OperationalStatus OperationalStatus {
 659                         get {
 660                                 if(((MacOsInterfaceFlags)_ifa_flags & MacOsInterfaceFlags.IFF_UP) == MacOsInterfaceFlags.IFF_UP){
 661                                         return OperationalStatus.Up;
 662                                 }
 663                                 return OperationalStatus.Unknown;
 664                         }
 665                 }
 666
 667                 public override bool SupportsMulticast {
 668                         get {
 669                                 return ((MacOsInterfaceFlags)_ifa_flags & MacOsInterfaceFlags.IFF_MULTICAST) == MacOsInterfaceFlags.IFF_MULTICAST;
 670                         }
 671                 }
 672         }
 673
 674         class Win32NetworkInterface2 : NetworkInterface
 675         {
 676                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 677                 static extern int GetAdaptersInfo (byte [] info, ref int size);
 678
 679                 [DllImport ("iphlpapi.dll", SetLastError = true)]
 680                 static extern int GetIfEntry (ref Win32_MIB_IFROW row);
 681
 682                 public static Win32_IP_ADAPTER_INFO GetAdapterInfoByIndex (int index)
 683                 {
 684                         foreach (Win32_IP_ADAPTER_INFO info in GetAdaptersInfo ())
 685                                 if (info.Index == index)
 686                                         return info;
 687                         return null;
 688                 }
 689
 690                 unsafe static Win32_IP_ADAPTER_INFO [] GetAdaptersInfo ()
 691                 {
 692                         byte [] bytes = null;
 693                         int len = 0;
 694                         GetAdaptersInfo (bytes, ref len);
 695                         bytes = new byte [len];
 696                         int ret = GetAdaptersInfo (bytes, ref len);
 697
 698                         if (ret != 0)
 699                                 throw new NetworkInformationException (ret);
 700
 701                         List<Win32_IP_ADAPTER_INFO> l = new List<Win32_IP_ADAPTER_INFO> ();
 702                         fixed (byte* ptr = bytes) {
 703                                 Win32_IP_ADAPTER_INFO info;
 704                                 for (IntPtr p = (IntPtr) ptr; p != IntPtr.Zero; p = info.Next) {
 705                                         info = new Win32_IP_ADAPTER_INFO ();
 706                                         Marshal.PtrToStructure (p, info);
 707                                         l.Add (info);
 708                                 }
 709                         }
 710                         return l.ToArray ();
 711                 }
 712
 713                 Win32_IP_ADAPTER_ADDRESSES addr;
 714                 Win32_MIB_IFROW mib4, mib6;
 715                 Win32IPv4InterfaceStatistics ip4stats;
 716                 IPInterfaceProperties ip_if_props;
 717
 718                 internal Win32NetworkInterface2 (Win32_IP_ADAPTER_ADDRESSES addr)
 719                 {
 720                         this.addr = addr;
 721                         mib4 = default (Win32_MIB_IFROW);
 722                         mib4.Index = addr.Alignment.IfIndex;
 723                         if (GetIfEntry (ref mib4) != 0)
 724                                 mib4.Index = -1; // unavailable;
 725                         mib6 = default (Win32_MIB_IFROW);
 726                         mib6.Index = addr.Ipv6IfIndex;
 727                         if (GetIfEntry (ref mib6) != 0)
 728                                 mib6.Index = -1; // unavailable;
 729                         ip4stats = new Win32IPv4InterfaceStatistics (mib4);
 730                         ip_if_props = new Win32IPInterfaceProperties2 (addr, mib4, mib6);
 731                 }
 732
 733                 public override IPInterfaceProperties GetIPProperties ()
 734                 {
 735                         return ip_if_props;
 736                 }
 737
 738                 public override IPv4InterfaceStatistics GetIPv4Statistics ()
 739                 {
 740                         return ip4stats;
 741                 }
 742
 743                 public override PhysicalAddress GetPhysicalAddress ()
 744                 {
 745                         byte [] bytes = new byte [addr.PhysicalAddressLength];
 746                         Array.Copy (addr.PhysicalAddress, 0, bytes, 0, bytes.Length);
 747                         return new PhysicalAddress (bytes);
 748                 }
 749
 750                 public override bool Supports (NetworkInterfaceComponent networkInterfaceComponent)
 751                 {
 752                         switch (networkInterfaceComponent) {
 753                         case NetworkInterfaceComponent.IPv4:
 754                                 return mib4.Index >= 0;
 755                         case NetworkInterfaceComponent.IPv6:
 756                                 return mib6.Index >= 0;
 757                         }
 758                         return false;
 759                 }
 760
 761                 public override string Description {
 762                         get { return addr.Description; }
 763                 }
 764                 public override string Id {
 765                         get { return addr.AdapterName; }
 766                 }
 767                 public override bool IsReceiveOnly {
 768                         get { return addr.IsReceiveOnly; }
 769                 }
 770                 public override string Name {
 771                         get { return addr.FriendlyName; }
 772                 }
 773                 public override NetworkInterfaceType NetworkInterfaceType {
 774                         get { return addr.IfType; }
 775                 }
 776                 public override OperationalStatus OperationalStatus {
 777                         get { return addr.OperStatus; }
 778                 }
 779                 public override long Speed {
 780                         get { return mib6.Index >= 0 ? mib6.Speed : mib4.Speed; }
 781                 }
 782                 public override bool SupportsMulticast {
 783                         get { return !addr.NoMulticast; }
 784                 }
 785         }
 786 }
 787