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

   1 //
   2 // System.Net.NetworkInformation.IPInterfaceProperties
   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 using System.Collections.Generic;
  30 using System.Globalization;
  31 using System.IO;
  32 using System.Net.Sockets;
  33 using System.Runtime.CompilerServices;
  34 using System.Text.RegularExpressions;
  35
  36 namespace System.Net.NetworkInformation {
  37         public abstract class IPInterfaceProperties {
  38                 protected IPInterfaceProperties ()
  39                 {
  40                 }
  41
  42                 public abstract IPv4InterfaceProperties GetIPv4Properties ();
  43                 public abstract IPv6InterfaceProperties GetIPv6Properties ();
  44
  45                 public abstract IPAddressInformationCollection AnycastAddresses { get; }
  46                 public abstract IPAddressCollection DhcpServerAddresses { get; }
  47                 public abstract IPAddressCollection DnsAddresses { get; }
  48                 public abstract string DnsSuffix { get; }
  49                 public abstract GatewayIPAddressInformationCollection GatewayAddresses { get; }
  50                 public abstract bool IsDnsEnabled { get; }
  51                 public abstract bool IsDynamicDnsEnabled { get; }
  52                 public abstract MulticastIPAddressInformationCollection MulticastAddresses { get; }
  53                 public abstract UnicastIPAddressInformationCollection UnicastAddresses { get; }
  54                 public abstract IPAddressCollection WinsServersAddresses { get; }
  55         }
  56
  57         abstract class UnixIPInterfaceProperties : IPInterfaceProperties
  58         {
  59                 protected IPv4InterfaceProperties ipv4iface_properties;
  60                 protected UnixNetworkInterface iface;
  61                 List <IPAddress> addresses;
  62                 IPAddressCollection dns_servers;
  63                 string dns_suffix;
  64                 DateTime last_parse;
  65
  66                 public UnixIPInterfaceProperties (UnixNetworkInterface iface, List <IPAddress> addresses)
  67                 {
  68                         this.iface = iface;
  69                         this.addresses = addresses;
  70                 }
  71
  72                 public override IPv6InterfaceProperties GetIPv6Properties ()
  73                 {
  74                         throw new NotImplementedException ();
  75                 }
  76
  77                 static Regex ns = new Regex (@"\s*nameserver\s+(?<address>.*)");
  78                 static Regex search = new Regex (@"\s*search\s+(?<domain>.*)");
  79                 void ParseResolvConf ()
  80                 {
  81                         try {
  82                                 DateTime wt = File.GetLastWriteTime ("/etc/resolv.conf");
  83                                 if (wt <= last_parse)
  84                                         return;
  85
  86                                 last_parse = wt;
  87                                 dns_suffix = "";
  88                                 dns_servers = new IPAddressCollection ();
  89                                 using (StreamReader reader = new StreamReader ("/etc/resolv.conf")) {
  90                                         string str;
  91                                         string line;
  92                                         while ((line = reader.ReadLine ()) != null) {
  93                                                 line = line.Trim ();
  94                                                 if (line.Length == 0 || line [0] == '#')
  95                                                         continue;
  96                                                 Match match = ns.Match (line);
  97                                                 if (match.Success) {
  98                                                         try {
  99                                                                 str = match.Groups ["address"].Value;
 100                                                                 str = str.Trim ();
 101                                                                 dns_servers.Add (IPAddress.Parse (str));
 102                                                         } catch {
 103                                                         }
 104                                                 } else {
 105                                                         match = search.Match (line);
 106                                                         if (match.Success) {
 107                                                                 str = match.Groups ["domain"].Value;
 108                                                                 string [] parts = str.Split (',');
 109                                                                 dns_suffix = parts [0].Trim ();
 110                                                         }
 111                                                 }
 112                                         }
 113                                 }
 114                         } catch {
 115                         } finally {
 116                                 dns_servers.SetReadOnly ();
 117                         }
 118                 }
 119
 120                 public override IPAddressInformationCollection AnycastAddresses {
 121                         get {
 122                                 List<IPAddress> anycastAddresses = new List<IPAddress> ();
 123                                 /* XXX:
 124                                 foreach (IPAddress address in addresses) {
 125                                         if (is_anycast_address (address)) {
 126                                                 anycastAddresses.Add (address);
 127                                         }
 128                                 }
 129                                 */
 130                                 return IPAddressInformationImplCollection.LinuxFromAnycast (anycastAddresses);
 131                         }
 132                 }
 133
 134                 [MonoTODO ("Always returns an empty collection.")]
 135                 public override IPAddressCollection DhcpServerAddresses {
 136                         get {
 137                                 // There are lots of different DHCP clients
 138                                 // that all store their configuration differently.
 139                                 // I'm not sure what to do here.
 140                                 IPAddressCollection coll = new IPAddressCollection ();
 141                                 coll.SetReadOnly ();
 142                                 return coll;
 143                         }
 144                 }
 145
 146                 public override IPAddressCollection DnsAddresses {
 147                         get {
 148                                 ParseResolvConf ();
 149                                 return dns_servers;
 150                         }
 151                 }
 152
 153                 public override string DnsSuffix {
 154                         get {
 155                                 ParseResolvConf ();
 156                                 return dns_suffix;
 157                         }
 158                 }
 159
 160                 [MonoTODO ("Always returns true")]
 161                 public override bool IsDnsEnabled {
 162                         get {
 163                                 return true;
 164                         }
 165                 }
 166
 167                 [MonoTODO ("Always returns false")]
 168                 public override bool IsDynamicDnsEnabled {
 169                         get {
 170                                 return false;
 171                         }
 172                 }
 173
 174                 public override MulticastIPAddressInformationCollection MulticastAddresses {
 175                         get {
 176                                 List<IPAddress> multicastAddresses = new List<IPAddress> ();
 177                                 foreach (IPAddress address in addresses) {
 178                                         byte[] addressBytes = address.GetAddressBytes ();
 179                                         if (addressBytes[0] >= 224 && addressBytes[0] <= 239) {
 180                                                 multicastAddresses.Add (address);
 181                                         }
 182                                 }
 183                                 return MulticastIPAddressInformationImplCollection.LinuxFromList (multicastAddresses);
 184                         }
 185                 }
 186
 187                 public override UnicastIPAddressInformationCollection UnicastAddresses {
 188                         get {
 189                                 List<IPAddress> unicastAddresses = new List<IPAddress> ();
 190                                 foreach (IPAddress address in addresses) {
 191                                         switch (address.AddressFamily) {
 192                                                 case AddressFamily.InterNetwork:
 193                                                         byte top = address.GetAddressBytes () [0];
 194                                                         if (top >= 224 && top <= 239)
 195                                                                 continue;
 196                                                         unicastAddresses.Add (address);
 197                                                         break;
 198
 199                                                 case AddressFamily.InterNetworkV6:
 200                                                         if (address.IsIPv6Multicast)
 201                                                                 continue;
 202                                                         unicastAddresses.Add (address);
 203                                                         break;
 204                                         }
 205                                 }
 206                                 return UnicastIPAddressInformationImplCollection.LinuxFromList (unicastAddresses);
 207                         }
 208                 }
 209
 210                 [MonoTODO ("Always returns an empty collection.")]
 211                 public override IPAddressCollection WinsServersAddresses {
 212                         get {
 213                                 // I do SUPPOSE we could scrape /etc/samba/smb.conf, but.. yeesh.
 214                                 return new IPAddressCollection ();
 215                         }
 216                 }
 217         }
 218
 219         class LinuxIPInterfaceProperties : UnixIPInterfaceProperties
 220         {
 221                 IPAddressCollection gateways;
 222
 223                 public LinuxIPInterfaceProperties (LinuxNetworkInterface iface, List <IPAddress> addresses)
 224                         : base (iface, addresses)
 225                 {
 226                 }
 227
 228                 public override IPv4InterfaceProperties GetIPv4Properties ()
 229                 {
 230                         if (ipv4iface_properties == null)
 231                                 ipv4iface_properties = new LinuxIPv4InterfaceProperties (iface as LinuxNetworkInterface);
 232
 233                         return ipv4iface_properties;
 234                 }
 235
 236                 void ParseRouteInfo (string iface)
 237                 {
 238                         try {
 239                                 using (StreamReader reader = new StreamReader ("/proc/net/route")) {
 240                                         string line;
 241                                         reader.ReadLine (); // Ignore first line
 242                                         while ((line = reader.ReadLine ()) != null) {
 243                                                 line = line.Trim ();
 244                                                 if (line.Length == 0)
 245                                                         continue;
 246
 247                                                 string [] parts = line.Split ('\t');
 248                                                 if (parts.Length < 3)
 249                                                         continue;
 250                                                 string gw_address = parts [2].Trim ();
 251                                                 byte [] ipbytes = new byte [4];
 252                                                 if (gw_address.Length == 8 && iface.Equals (parts [0], StringComparison.OrdinalIgnoreCase)) {
 253                                                         for (int i = 0; i < 4; i++) {
 254                                                                 if (!Byte.TryParse (gw_address.Substring (i * 2, 2), NumberStyles.HexNumber, null, out ipbytes [3 - i]))
 255                                                                         continue;
 256                                                         }
 257                                                         IPAddress ip = new IPAddress (ipbytes);
 258                                                         if (!ip.Equals (IPAddress.Any) && !gateways.Contains (ip))
 259                                                                 gateways.Add (ip);
 260                                                 }
 261                                         }
 262                                 }
 263                         } catch {
 264                         }
 265                 }
 266
 267                 public override GatewayIPAddressInformationCollection GatewayAddresses {
 268                         get {
 269                                 gateways = new IPAddressCollection ();
 270                                 ParseRouteInfo (this.iface.Name.ToString());
 271                                 if (gateways.Count > 0)
 272                                         return new UnixGatewayIPAddressInformationCollection (gateways);
 273                                 else
 274                                         return UnixGatewayIPAddressInformationCollection.Empty;
 275                         }
 276                 }
 277         }
 278
 279         class MacOsIPInterfaceProperties : UnixIPInterfaceProperties
 280         {
 281                 IPAddressCollection gateways;
 282
 283                 public MacOsIPInterfaceProperties (MacOsNetworkInterface iface, List <IPAddress> addresses)
 284                         : base (iface, addresses)
 285                 {
 286                 }
 287
 288                 public override IPv4InterfaceProperties GetIPv4Properties ()
 289                 {
 290                         if (ipv4iface_properties == null)
 291                                 ipv4iface_properties = new MacOsIPv4InterfaceProperties (iface as MacOsNetworkInterface);
 292
 293                         return ipv4iface_properties;
 294                 }
 295
 296                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 297                 private extern static bool ParseRouteInfo_internal(string iface, out string[] gw_addr_list);
 298
 299                 public override GatewayIPAddressInformationCollection GatewayAddresses {
 300                         get {
 301                                 gateways = new IPAddressCollection ();
 302                                 string[] gw_addrlist;
 303                                 if (!ParseRouteInfo_internal (this.iface.Name.ToString(), out gw_addrlist))
 304                                         return UnixGatewayIPAddressInformationCollection.Empty;
 305
 306                                 for(int i=0; i<gw_addrlist.Length; i++) {
 307                                         try {
 308                                                 IPAddress ip = IPAddress.Parse(gw_addrlist[i]);
 309                                                 if (!ip.Equals (IPAddress.Any) && !gateways.Contains (ip))
 310                                                         gateways.Add (ip);
 311                                         } catch (ArgumentNullException) {
 312                                                 /* Ignore this, as the
 313                                                  * internal call might have
 314                                                  * left some blank entries at
 315                                                  * the end of the array
 316                                                  */
 317                                         }
 318                                 }
 319
 320                                 if (gateways.Count > 0)
 321                                         return new UnixGatewayIPAddressInformationCollection (gateways);
 322                                 else
 323                                         return UnixGatewayIPAddressInformationCollection.Empty;
 324                         }
 325                 }
 326         }
 327
 328 #if !MOBILE
 329         class Win32IPInterfaceProperties2 : IPInterfaceProperties
 330         {
 331                 readonly Win32_IP_ADAPTER_ADDRESSES addr;
 332                 readonly Win32_MIB_IFROW mib4, mib6;
 333
 334                 public Win32IPInterfaceProperties2 (Win32_IP_ADAPTER_ADDRESSES addr, Win32_MIB_IFROW mib4, Win32_MIB_IFROW mib6)
 335                 {
 336                         this.addr = addr;
 337                         this.mib4 = mib4;
 338                         this.mib6 = mib6;
 339                 }
 340
 341                 public override IPv4InterfaceProperties GetIPv4Properties ()
 342                 {
 343                         Win32_IP_ADAPTER_INFO v4info = Win32NetworkInterface2.GetAdapterInfoByIndex (mib4.Index);
 344                         return v4info != null ? new Win32IPv4InterfaceProperties (v4info, mib4) : null;
 345                 }
 346
 347                 public override IPv6InterfaceProperties GetIPv6Properties ()
 348                 {
 349                         Win32_IP_ADAPTER_INFO v6info = Win32NetworkInterface2.GetAdapterInfoByIndex (mib6.Index);
 350                         return v6info != null ? new Win32IPv6InterfaceProperties (mib6) : null;
 351                 }
 352
 353                 public override IPAddressInformationCollection AnycastAddresses {
 354                         get { return IPAddressInformationImplCollection.Win32FromAnycast (addr.FirstAnycastAddress); }
 355                 }
 356
 357                 public override IPAddressCollection DhcpServerAddresses {
 358                         get {
 359                                 Win32_IP_ADAPTER_INFO v4info = Win32NetworkInterface2.GetAdapterInfoByIndex (mib4.Index);
 360                                 // FIXME: should ipv6 DhcpServer be considered?
 361                                 return v4info != null ? new Win32IPAddressCollection (v4info.DhcpServer) : Win32IPAddressCollection.Empty;
 362                         }
 363                 }
 364
 365                 public override IPAddressCollection DnsAddresses {
 366                         get { return Win32IPAddressCollection.FromDnsServer (addr.FirstDnsServerAddress); }
 367                 }
 368
 369                 public override string DnsSuffix {
 370                         get { return addr.DnsSuffix; }
 371                 }
 372
 373                 public override GatewayIPAddressInformationCollection GatewayAddresses {
 374                         get {
 375                                 Win32_IP_ADAPTER_INFO v4info = Win32NetworkInterface2.GetAdapterInfoByIndex (mib4.Index);
 376                                 // FIXME: should ipv6 DhcpServer be considered?
 377                                 return v4info != null ? new Win32GatewayIPAddressInformationCollection (v4info.GatewayList) : Win32GatewayIPAddressInformationCollection.Empty;
 378                         }
 379                 }
 380
 381                 public override bool IsDnsEnabled {
 382                         get { return Win32_FIXED_INFO.Instance.EnableDns != 0; }
 383                 }
 384
 385                 public override bool IsDynamicDnsEnabled {
 386                         get { return addr.DdnsEnabled; }
 387                 }
 388
 389                 public override MulticastIPAddressInformationCollection MulticastAddresses {
 390                         get { return MulticastIPAddressInformationImplCollection.Win32FromMulticast (addr.FirstMulticastAddress); }
 391                 }
 392
 393                 public override UnicastIPAddressInformationCollection UnicastAddresses {
 394                         get {
 395                                 Win32_IP_ADAPTER_INFO ai = Win32NetworkInterface2.GetAdapterInfoByIndex (mib4.Index);
 396                                 // FIXME: should ipv6 DhcpServer be considered?
 397                                 return ai != null ? UnicastIPAddressInformationImplCollection.Win32FromUnicast ((int) ai.Index, addr.FirstUnicastAddress) : UnicastIPAddressInformationImplCollection.Empty;
 398                         }
 399                 }
 400
 401                 public override IPAddressCollection WinsServersAddresses {
 402                         get {
 403                                 Win32_IP_ADAPTER_INFO v4info = Win32NetworkInterface2.GetAdapterInfoByIndex (mib4.Index);
 404                                 // FIXME: should ipv6 DhcpServer be considered?
 405                                 return v4info != null ? new Win32IPAddressCollection (v4info.PrimaryWinsServer, v4info.SecondaryWinsServer) : Win32IPAddressCollection.Empty;
 406                         }
 407                 }
 408
 409         }
 410 #endif
 411 }
 412
 413