class/System/System.Net.NetworkInformation/IPGlobalProperties.cs

   1 //
   2 // System.Net.NetworkInformation.IPGlobalProperties
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   6 //      Atsushi Enomoto (atsushi@ximian.com)
   7 //
   8 // Copyright (c) 2006-2007 Novell, Inc. (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System.Collections.Generic;
  31 using System.Collections.Specialized;
  32 using System.Globalization;
  33 using System.IO;
  34 using System.Net.Sockets;
  35 using System.Runtime.InteropServices;
  36 using System.Text;
  37
  38 namespace System.Net.NetworkInformation {
  39         public abstract class IPGlobalProperties {
  40                 protected IPGlobalProperties ()
  41                 {
  42                 }
  43
  44                 public static IPGlobalProperties GetIPGlobalProperties ()
  45                 {
  46                         switch (Environment.OSVersion.Platform) {
  47                         case PlatformID.Unix:
  48                                 MibIPGlobalProperties impl = null;
  49                                 if (Directory.Exists (MibIPGlobalProperties.ProcDir)) {
  50                                         impl = new MibIPGlobalProperties (MibIPGlobalProperties.ProcDir);
  51                                         if (File.Exists (impl.StatisticsFile))
  52                                                 return impl;
  53                                 }
  54                                 if (Directory.Exists (MibIPGlobalProperties.CompatProcDir)) {
  55                                         impl = new MibIPGlobalProperties (MibIPGlobalProperties.CompatProcDir);
  56                                         if (File.Exists (impl.StatisticsFile))
  57                                                 return impl;
  58                                 }
  59                                 throw new NotSupportedException ("This platform is not supported");
  60                         default:
  61                                 return new Win32IPGlobalProperties ();
  62                         }
  63                 }
  64
  65                 public abstract TcpConnectionInformation [] GetActiveTcpConnections ();
  66                 public abstract IPEndPoint [] GetActiveTcpListeners ();
  67                 public abstract IPEndPoint [] GetActiveUdpListeners ();
  68                 public abstract IcmpV4Statistics GetIcmpV4Statistics ();
  69                 public abstract IcmpV6Statistics GetIcmpV6Statistics ();
  70                 public abstract IPGlobalStatistics GetIPv4GlobalStatistics ();
  71                 public abstract IPGlobalStatistics GetIPv6GlobalStatistics ();
  72                 public abstract TcpStatistics GetTcpIPv4Statistics ();
  73                 public abstract TcpStatistics GetTcpIPv6Statistics ();
  74                 public abstract UdpStatistics GetUdpIPv4Statistics ();
  75                 public abstract UdpStatistics GetUdpIPv6Statistics ();
  76
  77                 public abstract string DhcpScopeName { get; }
  78                 public abstract string DomainName { get; }
  79                 public abstract string HostName { get; }
  80                 public abstract bool IsWinsProxy { get; }
  81                 public abstract NetBiosNodeType NodeType { get; }
  82         }
  83
  84         // It expects /proc/net/snmp (or /usr/compat/linux/proc/net/snmp),
  85         // formatted like:
  86         // http://www.linuxdevcenter.com/linux/2000/11/16/example5.html
  87         // http://www.linuxdevcenter.com/linux/2000/11/16/example2.html
  88         class MibIPGlobalProperties : IPGlobalProperties
  89         {
  90                 [DllImport ("libc")]
  91                 static extern int gethostname ([MarshalAs (UnmanagedType.LPArray, SizeParamIndex = 1)] byte [] name, int len);
  92
  93                 [DllImport ("libc")]
  94                 static extern int getdomainname ([MarshalAs (UnmanagedType.LPArray, SizeParamIndex = 1)] byte [] name, int len);
  95
  96                 public const string ProcDir = "/proc";
  97                 public const string CompatProcDir = "/usr/compat/linux/proc";
  98
  99                 public readonly string StatisticsFile, StatisticsFileIPv6, TcpFile, Tcp6File, UdpFile, Udp6File;
 100
 101                 public MibIPGlobalProperties (string procDir)
 102                 {
 103                         StatisticsFile = Path.Combine (procDir, "net/snmp");
 104                         StatisticsFileIPv6 = Path.Combine (procDir, "net/snmp6");
 105                         TcpFile = Path.Combine (procDir,"net/tcp");
 106                         Tcp6File = Path.Combine (procDir,"net/tcp6");
 107                         UdpFile = Path.Combine (procDir,"net/udp");
 108                         Udp6File = Path.Combine (procDir,"net/udp6");
 109                 }
 110
 111                 StringDictionary GetProperties4 (string item)
 112                 {
 113                         string file = StatisticsFile;
 114
 115                         string head = item + ": ";
 116                         using (StreamReader sr = new StreamReader (file, Encoding.ASCII)) {
 117                                 string [] keys = null;
 118                                 string [] values = null;
 119                                 string s = String.Empty;
 120                                 do {
 121                                         s = sr.ReadLine ();
 122                                         if (String.IsNullOrEmpty (s))
 123                                                 continue;
 124                                         if (s.Length <= head.Length || String.CompareOrdinal (s, 0, head, 0, head.Length) != 0)
 125                                                 continue;
 126                                         if (keys == null)
 127                                                 keys = s.Substring (head.Length).Split (' ');
 128                                         else if (values != null)
 129                                                 // hmm, there may be better error type...
 130                                                 throw CreateException (file, String.Format ("Found duplicate line for values for the same item '{0}'", item));
 131                                         else {
 132                                                 values = s.Substring (head.Length).Split (' ');
 133                                                 break;
 134                                         }
 135                                 } while (!sr.EndOfStream);
 136
 137                                 if (values == null)
 138                                         throw CreateException (file, String.Format ("No corresponding line was not found for '{0}'", item));
 139                                 if (keys.Length != values.Length)
 140                                         throw CreateException (file, String.Format ("The counts in the header line and the value line do not match for '{0}'", item));
 141                                 StringDictionary dic = new StringDictionary ();
 142                                 for (int i = 0; i < keys.Length; i++)
 143                                         dic [keys [i]] = values [i];
 144                                 return dic;
 145                         }
 146                 }
 147
 148                 StringDictionary GetProperties6 (string item)
 149                 {
 150                         if (!File.Exists (StatisticsFileIPv6))
 151                                 throw new NetworkInformationException ();
 152
 153                         string file = StatisticsFileIPv6;
 154
 155                         string head = item;
 156                         using (StreamReader sr = new StreamReader (file, Encoding.ASCII)) {
 157                                 StringDictionary dic = new StringDictionary ();
 158                                 string s = String.Empty;
 159                                 do {
 160                                         s = sr.ReadLine ();
 161                                         if (String.IsNullOrEmpty (s))
 162                                                 continue;
 163                                         if (s.Length <= head.Length || String.CompareOrdinal (s, 0, head, 0, head.Length) != 0)
 164                                                 continue;
 165                                         int idx = s.IndexOfAny (wsChars, head.Length);
 166                                         if (idx < 0)
 167                                                 throw CreateException (file, null);
 168                                         dic [s.Substring (head.Length, idx - head.Length)] = s.Substring (idx + 1).Trim (wsChars);
 169                                 } while (!sr.EndOfStream);
 170
 171                                 return dic;
 172                         }
 173                 }
 174
 175                 static readonly char [] wsChars = new char [] {' ', '\t'};
 176
 177                 Exception CreateException (string file, string msg)
 178                 {
 179                         return new InvalidOperationException (String.Format ("Unsupported (unexpected) '{0}' file format. ", file) + msg);
 180                 }
 181                 IPEndPoint [] GetLocalAddresses (List<string []> list)
 182                 {
 183                         IPEndPoint [] ret = new IPEndPoint [list.Count];
 184                         for (int i = 0; i < ret.Length; i++)
 185                                 ret [i] = ToEndpoint (list [i] [1]);
 186                         return ret;
 187                 }
 188
 189                 IPEndPoint ToEndpoint (string s)
 190                 {
 191                         int idx = s.IndexOf (':');
 192                         int port = int.Parse (s.Substring (idx + 1), NumberStyles.HexNumber);
 193                         if (s.Length == 13)
 194                                 return new IPEndPoint (long.Parse (s.Substring (0, idx), NumberStyles.HexNumber), port);
 195                         else {
 196                                 byte [] bytes = new byte [16];
 197                                 for (int i = 0; (i << 1) < idx; i++)
 198                                         bytes [i] = byte.Parse (s.Substring (i << 1, 2), NumberStyles.HexNumber);
 199                                 return new IPEndPoint (new IPAddress (bytes), port);
 200                         }
 201                 }
 202
 203                 void GetRows (string file, List<string []> list)
 204                 {
 205                         if (!File.Exists (file))
 206                                 return;
 207                         using (StreamReader sr = new StreamReader (file, Encoding.ASCII)) {
 208                                 sr.ReadLine (); // skip first line
 209                                 while (!sr.EndOfStream) {
 210                                         string [] item = sr.ReadLine ().Split (wsChars, StringSplitOptions.RemoveEmptyEntries);
 211                                         if (item.Length < 4)
 212                                                 throw CreateException (file, null);
 213                                         list.Add (item);
 214                                 }
 215                         }
 216                 }
 217
 218                 public override TcpConnectionInformation [] GetActiveTcpConnections ()
 219                 {
 220                         List<string []> list = new List<string []> ();
 221                         GetRows (TcpFile, list);
 222                         GetRows (Tcp6File, list);
 223
 224                         TcpConnectionInformation [] ret = new TcpConnectionInformation [list.Count];
 225                         for (int i = 0; i < ret.Length; i++) {
 226                                 // sl  local_address rem_address   st tx_queue rx_queue tr tm->when retrnsmt   uid  timeout inode
 227                                 IPEndPoint local = ToEndpoint (list [i] [1]);
 228                                 IPEndPoint remote = ToEndpoint (list [i] [2]);
 229                                 TcpState state = (TcpState) int.Parse (list [i] [3], NumberStyles.HexNumber);
 230                                 ret [i] = new TcpConnectionInformationImpl (local, remote, state);
 231                         }
 232                         return ret;
 233                 }
 234
 235                 public override IPEndPoint [] GetActiveTcpListeners ()
 236                 {
 237                         List<string []> list = new List<string []> ();
 238                         GetRows (TcpFile, list);
 239                         GetRows (Tcp6File, list);
 240                         return GetLocalAddresses (list);
 241                 }
 242
 243                 public override IPEndPoint [] GetActiveUdpListeners ()
 244                 {
 245                         List<string []> list = new List<string []> ();
 246                         GetRows (UdpFile, list);
 247                         GetRows (Udp6File, list);
 248                         return GetLocalAddresses (list);
 249                 }
 250
 251                 public override IcmpV4Statistics GetIcmpV4Statistics ()
 252                 {
 253                         return new MibIcmpV4Statistics (GetProperties4 ("Icmp"));
 254                 }
 255
 256                 public override IcmpV6Statistics GetIcmpV6Statistics ()
 257                 {
 258                         return new MibIcmpV6Statistics (GetProperties6 ("Icmp6"));
 259                 }
 260
 261                 public override IPGlobalStatistics GetIPv4GlobalStatistics ()
 262                 {
 263                         return new MibIPGlobalStatistics (GetProperties4 ("Ip"));
 264                 }
 265
 266                 public override IPGlobalStatistics GetIPv6GlobalStatistics ()
 267                 {
 268                         return new MibIPGlobalStatistics (GetProperties6 ("Ip6"));
 269                 }
 270
 271                 public override TcpStatistics GetTcpIPv4Statistics ()
 272                 {
 273                         return new MibTcpStatistics (GetProperties4 ("Tcp"));
 274                 }
 275
 276                 public override TcpStatistics GetTcpIPv6Statistics ()
 277                 {
 278                         // There is no TCP info in /proc/net/snmp,
 279                         // so it is shared with IPv4 info.
 280                         return new MibTcpStatistics (GetProperties4 ("Tcp"));
 281                 }
 282
 283                 public override UdpStatistics GetUdpIPv4Statistics ()
 284                 {
 285                         return new MibUdpStatistics (GetProperties4 ("Udp"));
 286                 }
 287
 288                 public override UdpStatistics GetUdpIPv6Statistics ()
 289                 {
 290                         return new MibUdpStatistics (GetProperties6 ("Udp6"));
 291                 }
 292
 293                 public override string DhcpScopeName {
 294                         get { return String.Empty; }
 295                 }
 296
 297                 public override string DomainName {
 298                         get {
 299                                 byte [] bytes = new byte [256];
 300                                 if (getdomainname (bytes, 256) != 0)
 301                                         throw new NetworkInformationException ();
 302                                 int len = Array.IndexOf<byte> (bytes, 0);
 303                                 return Encoding.ASCII.GetString (bytes, 0, len < 0 ? 256 : len);
 304                         }
 305                 }
 306
 307                 public override string HostName {
 308                         get {
 309                                 byte [] bytes = new byte [256];
 310                                 if (gethostname (bytes, 256) != 0)
 311                                         throw new NetworkInformationException ();
 312                                 int len = Array.IndexOf<byte> (bytes, 0);
 313                                 return Encoding.ASCII.GetString (bytes, 0, len < 0 ? 256 : len);
 314                         }
 315                 }
 316
 317                 public override bool IsWinsProxy {
 318                         get { return false; } // no WINS
 319                 }
 320
 321                 public override NetBiosNodeType NodeType {
 322                         get { return NetBiosNodeType.Unknown; } // no NetBios
 323                 }
 324         }
 325
 326         class Win32IPGlobalProperties : IPGlobalProperties
 327         {
 328                 public const int AF_INET = 2;
 329                 public const int AF_INET6 = 23;
 330
 331                 // FIXME: it might be getting wrong table. I'm getting
 332                 // different results from .NET 2.0.
 333                 unsafe void FillTcpTable (out List<Win32_MIB_TCPROW> tab4, out List<Win32_MIB_TCP6ROW> tab6)
 334                 {
 335                         tab4 = new List<Win32_MIB_TCPROW> ();
 336                         int size4 = 0;
 337                         GetTcpTable (null, ref size4, true); // get size
 338                         byte [] bytes4 = new byte [size4];
 339                         GetTcpTable (bytes4, ref size4, true); // get list
 340
 341                         int structSize4 = Marshal.SizeOf (typeof (Win32_MIB_TCPROW));
 342
 343                         fixed (byte* ptr = bytes4) {
 344                                 int count = Marshal.ReadInt32 ((IntPtr) ptr);
 345                                 for (int i = 0; i < count; i++) {
 346                                         Win32_MIB_TCPROW row = new Win32_MIB_TCPROW ();
 347                                         Marshal.PtrToStructure ((IntPtr) (ptr + i * structSize4 + 4), row);
 348                                         tab4.Add (row);
 349                                 }
 350                         }
 351
 352                         tab6 = new List<Win32_MIB_TCP6ROW> ();
 353                         if (Environment.OSVersion.Version.Major >= 6) { // Vista
 354                                 int size6 = 0;
 355                                 GetTcp6Table (null, ref size6, true); // get size
 356                                 byte [] bytes6 = new byte [size6];
 357                                 GetTcp6Table (bytes6, ref size6, true); // get list
 358
 359                                 int structSize6 = Marshal.SizeOf (typeof (Win32_MIB_TCP6ROW));
 360
 361                                 fixed (byte* ptr = bytes6) {
 362                                         int count = Marshal.ReadInt32 ((IntPtr) ptr);
 363                                         for (int i = 0; i < count; i++) {
 364                                                 Win32_MIB_TCP6ROW row = new Win32_MIB_TCP6ROW ();
 365                                                 Marshal.PtrToStructure ((IntPtr) (ptr + i * structSize6 + 4), row);
 366                                                 tab6.Add (row);
 367                                         }
 368                                 }
 369                         }
 370                 }
 371
 372                 bool IsListenerState (TcpState state)
 373                 {
 374                         switch (state) {
 375                         case TcpState.SynSent:
 376                         case TcpState.Listen:
 377                         case TcpState.FinWait1:
 378                         case TcpState.FinWait2:
 379                         case TcpState.CloseWait:
 380                                 return true;
 381                         }
 382                         return false;
 383                 }
 384
 385                 public override TcpConnectionInformation [] GetActiveTcpConnections ()
 386                 {
 387                         List<Win32_MIB_TCPROW> tab4 = null;
 388                         List<Win32_MIB_TCP6ROW> tab6 = null;
 389                         FillTcpTable (out tab4, out tab6);
 390                         int size4 = tab4.Count;
 391
 392                         TcpConnectionInformation [] ret = new TcpConnectionInformation [size4 + tab6.Count];
 393                         for (int i = 0; i < size4; i++)
 394                                 ret [i] = tab4 [i].TcpInfo;
 395                         for (int i = 0; i < tab6.Count; i++)
 396                                 ret [size4 + i] = tab6 [i].TcpInfo;
 397                         return ret;
 398                 }
 399
 400                 public override IPEndPoint [] GetActiveTcpListeners ()
 401                 {
 402                         List<Win32_MIB_TCPROW> tab4 = null;
 403                         List<Win32_MIB_TCP6ROW> tab6 = null;
 404                         FillTcpTable (out tab4, out tab6);
 405
 406                         List<IPEndPoint> ret = new List<IPEndPoint> ();
 407                         for (int i = 0, count = tab4.Count; i < count; i++)
 408                                 if (IsListenerState (tab4 [i].State))
 409                                         ret.Add (tab4 [i].LocalEndPoint);
 410                         for (int i = 0, count = tab6.Count; i < count; i++)
 411                                 if (IsListenerState (tab6 [i].State))
 412                                         ret.Add (tab6 [i].LocalEndPoint);
 413                         return ret.ToArray ();
 414                 }
 415
 416                 public unsafe override IPEndPoint [] GetActiveUdpListeners ()
 417                 {
 418                         List<IPEndPoint> list = new List<IPEndPoint> ();
 419
 420                         byte [] bytes4 = null;
 421                         int size4 = 0;
 422                         GetUdpTable (null, ref size4, true); // get size
 423                         bytes4 = new byte [size4];
 424                         GetUdpTable (bytes4, ref size4, true); // get list
 425
 426                         int structSize4 = Marshal.SizeOf (typeof (Win32_MIB_UDPROW));
 427
 428                         fixed (byte* ptr = bytes4) {
 429                                 int count = Marshal.ReadInt32 ((IntPtr) ptr);
 430                                 for (int i = 0; i < count; i++) {
 431                                         Win32_MIB_UDPROW row = new Win32_MIB_UDPROW ();
 432                                         Marshal.PtrToStructure ((IntPtr) (ptr + i * structSize4 + 4), row);
 433                                         list.Add (row.LocalEndPoint);
 434                                 }
 435                         }
 436
 437                         if (Environment.OSVersion.Version.Major >= 6) { // Vista
 438                                 byte [] bytes6 = null;
 439                                 int size6 = 0;
 440                                 GetUdp6Table (null, ref size6, true); // get size
 441                                 bytes6 = new byte [size6];
 442                                 GetUdp6Table (bytes6, ref size6, true); // get list
 443
 444                                 int structSize6 = Marshal.SizeOf (typeof (Win32_MIB_UDP6ROW));
 445
 446                                 fixed (byte* ptr = bytes6) {
 447                                         int count = Marshal.ReadInt32 ((IntPtr) ptr);
 448                                         for (int i = 0; i < count; i++) {
 449                                                 Win32_MIB_UDP6ROW row = new Win32_MIB_UDP6ROW ();
 450                                                 Marshal.PtrToStructure ((IntPtr) (ptr + i * structSize6 + 4), row);
 451                                                 list.Add (row.LocalEndPoint);
 452                                         }
 453                                 }
 454                         }
 455
 456                         return list.ToArray ();
 457                 }
 458
 459                 public override IcmpV4Statistics GetIcmpV4Statistics ()
 460                 {
 461                         if (!Socket.SupportsIPv4)
 462                                 throw new NetworkInformationException ();
 463                         Win32_MIBICMPINFO stats;
 464                         GetIcmpStatistics (out stats, AF_INET);
 465                         return new Win32IcmpV4Statistics (stats);
 466                 }
 467
 468                 public override IcmpV6Statistics GetIcmpV6Statistics ()
 469                 {
 470                         if (!Socket.OSSupportsIPv6)
 471                                 throw new NetworkInformationException ();
 472                         Win32_MIB_ICMP_EX stats;
 473                         GetIcmpStatisticsEx (out stats, AF_INET6);
 474                         return new Win32IcmpV6Statistics (stats);
 475                 }
 476
 477                 public override IPGlobalStatistics GetIPv4GlobalStatistics ()
 478                 {
 479                         if (!Socket.SupportsIPv4)
 480                                 throw new NetworkInformationException ();
 481                         Win32_MIB_IPSTATS stats;
 482                         GetIPStatisticsEx (out stats, AF_INET);
 483                         return new Win32IPGlobalStatistics (stats);
 484                 }
 485
 486                 public override IPGlobalStatistics GetIPv6GlobalStatistics ()
 487                 {
 488                         if (!Socket.OSSupportsIPv6)
 489                                 throw new NetworkInformationException ();
 490                         Win32_MIB_IPSTATS stats;
 491                         GetIPStatisticsEx (out stats, AF_INET6);
 492                         return new Win32IPGlobalStatistics (stats);
 493                 }
 494
 495                 public override TcpStatistics GetTcpIPv4Statistics ()
 496                 {
 497                         if (!Socket.SupportsIPv4)
 498                                 throw new NetworkInformationException ();
 499                         Win32_MIB_TCPSTATS stats;
 500                         GetTcpStatisticsEx (out stats, AF_INET);
 501                         return new Win32TcpStatistics (stats);
 502                 }
 503
 504                 public override TcpStatistics GetTcpIPv6Statistics ()
 505                 {
 506                         if (!Socket.OSSupportsIPv6)
 507                                 throw new NetworkInformationException ();
 508                         Win32_MIB_TCPSTATS stats;
 509                         GetTcpStatisticsEx (out stats, AF_INET6);
 510                         return new Win32TcpStatistics (stats);
 511                 }
 512
 513                 public override UdpStatistics GetUdpIPv4Statistics ()
 514                 {
 515                         if (!Socket.SupportsIPv4)
 516                                 throw new NetworkInformationException ();
 517                         Win32_MIB_UDPSTATS stats;
 518                         GetUdpStatisticsEx (out stats, AF_INET);
 519                         return new Win32UdpStatistics (stats);
 520                 }
 521
 522                 public override UdpStatistics GetUdpIPv6Statistics ()
 523                 {
 524                         if (!Socket.OSSupportsIPv6)
 525                                 throw new NetworkInformationException ();
 526                         Win32_MIB_UDPSTATS stats;
 527                         GetUdpStatisticsEx (out stats, AF_INET6);
 528                         return new Win32UdpStatistics (stats);
 529                 }
 530
 531                 public override string DhcpScopeName {
 532                         get { return Win32_FIXED_INFO.Instance.ScopeId; }
 533                 }
 534
 535                 public override string DomainName {
 536                         get { return Win32_FIXED_INFO.Instance.DomainName; }
 537                 }
 538
 539                 public override string HostName {
 540                         get { return Win32_FIXED_INFO.Instance.HostName; }
 541                 }
 542
 543                 public override bool IsWinsProxy {
 544                         get { return Win32_FIXED_INFO.Instance.EnableProxy != 0; }
 545                 }
 546
 547                 public override NetBiosNodeType NodeType {
 548                         get { return Win32_FIXED_INFO.Instance.NodeType; }
 549                 }
 550
 551                 // PInvokes
 552
 553                 [DllImport ("Iphlpapi.dll")]
 554                 static extern int GetTcpTable (byte [] pTcpTable, ref int pdwSize, bool bOrder);
 555
 556                 [DllImport ("Iphlpapi.dll")]
 557                 static extern int GetTcp6Table (byte [] TcpTable, ref int SizePointer, bool Order);
 558
 559                 [DllImport ("Iphlpapi.dll")]
 560                 static extern int GetUdpTable (byte [] pUdpTable, ref int pdwSize, bool bOrder);
 561
 562                 [DllImport ("Iphlpapi.dll")]
 563                 static extern int GetUdp6Table (byte [] Udp6Table, ref int SizePointer, bool Order);
 564
 565                 [DllImport ("Iphlpapi.dll")]
 566                 static extern int GetTcpStatisticsEx (out Win32_MIB_TCPSTATS pStats, int dwFamily);
 567
 568                 [DllImport ("Iphlpapi.dll")]
 569                 static extern int GetUdpStatisticsEx (out Win32_MIB_UDPSTATS pStats, int dwFamily);
 570
 571                 [DllImport ("Iphlpapi.dll")]
 572                 static extern int GetIcmpStatistics (out Win32_MIBICMPINFO pStats, int dwFamily);
 573
 574                 [DllImport ("Iphlpapi.dll")]
 575                 static extern int GetIcmpStatisticsEx (out Win32_MIB_ICMP_EX pStats, int dwFamily);
 576
 577                 [DllImport ("Iphlpapi.dll")]
 578                 static extern int GetIPStatisticsEx (out Win32_MIB_IPSTATS pStats, int dwFamily);
 579
 580                 // Win32 structures
 581
 582                 [StructLayout (LayoutKind.Explicit)]
 583                 struct Win32_IN6_ADDR
 584                 {
 585                         [FieldOffset (0)]
 586                         [MarshalAs ((short) UnmanagedType.U1, SizeConst = 16)]
 587                         public byte [] Bytes;
 588                 }
 589
 590                 [StructLayout (LayoutKind.Sequential)]
 591                 class Win32_MIB_TCPROW
 592                 {
 593                         public TcpState State;
 594                         public uint LocalAddr;
 595                         public int LocalPort;
 596                         public uint RemoteAddr;
 597                         public int RemotePort;
 598
 599                         public IPEndPoint LocalEndPoint {
 600                                 get { return new IPEndPoint (LocalAddr, LocalPort); }
 601                         }
 602
 603                         public IPEndPoint RemoteEndPoint {
 604                                 get { return new IPEndPoint (RemoteAddr, RemotePort); }
 605                         }
 606
 607                         public TcpConnectionInformation TcpInfo {
 608                                 get { return new TcpConnectionInformationImpl (LocalEndPoint, RemoteEndPoint, State); }
 609                         }
 610                 }
 611
 612                 [StructLayout (LayoutKind.Sequential)]
 613                 class Win32_MIB_TCP6ROW
 614                 {
 615                         public TcpState State;
 616                         public Win32_IN6_ADDR LocalAddr;
 617                         public uint LocalScopeId;
 618                         public int LocalPort;
 619                         public Win32_IN6_ADDR RemoteAddr;
 620                         public uint RemoteScopeId;
 621                         public int RemotePort;
 622
 623                         public IPEndPoint LocalEndPoint {
 624                                 get { return new IPEndPoint (new IPAddress (LocalAddr.Bytes, LocalScopeId), LocalPort); }
 625                         }
 626
 627                         public IPEndPoint RemoteEndPoint {
 628                                 get { return new IPEndPoint (new IPAddress (RemoteAddr.Bytes, RemoteScopeId), RemotePort); }
 629                         }
 630
 631                         public TcpConnectionInformation TcpInfo {
 632                                 get { return new TcpConnectionInformationImpl (LocalEndPoint, RemoteEndPoint, State); }
 633                         }
 634                 }
 635
 636                 [StructLayout (LayoutKind.Sequential)]
 637                 class Win32_MIB_UDPROW
 638                 {
 639                         public uint LocalAddr;
 640                         public int LocalPort;
 641
 642                         public IPEndPoint LocalEndPoint {
 643                                 get { return new IPEndPoint (LocalAddr, LocalPort); }
 644                         }
 645                 }
 646
 647                 [StructLayout (LayoutKind.Sequential)]
 648                 class Win32_MIB_UDP6ROW
 649                 {
 650                         public Win32_IN6_ADDR LocalAddr;
 651                         public uint LocalScopeId;
 652                         public int LocalPort;
 653
 654                         public IPEndPoint LocalEndPoint {
 655                                 get { return new IPEndPoint (new IPAddress (LocalAddr.Bytes, LocalScopeId), LocalPort); }
 656                         }
 657                 }
 658         }
 659 }