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 #if NET_2_0
  30 using System.Collections.Generic;
  31 using System.Globalization;
  32 using System.IO;
  33 using System.Net.Sockets;
  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                 IPAddressCollection gateways;
  64                 string dns_suffix;
  65                 DateTime last_parse;
  66
  67                 public UnixIPInterfaceProperties (UnixNetworkInterface iface, List <IPAddress> addresses)
  68                 {
  69                         this.iface = iface;
  70                         this.addresses = addresses;
  71                 }
  72
  73                 public override IPv6InterfaceProperties GetIPv6Properties ()
  74                 {
  75                         throw new NotImplementedException ();
  76                 }
  77
  78                 void ParseRouteInfo (string iface)
  79                 {
  80                         try {
  81                                 gateways = new IPAddressCollection ();
  82                                 using (StreamReader reader = new StreamReader ("/proc/net/route")) {
  83                                         string line;
  84                                         reader.ReadLine (); // Ignore first line
  85                                         while ((line = reader.ReadLine ()) != null) {
  86                                                 line = line.Trim ();
  87                                                 if (line.Length == 0)
  88                                                         continue;
  89
  90                                                 string [] parts = line.Split ('\t');
  91                                                 if (parts.Length < 3)
  92                                                         continue;
  93                                                 string gw_address = parts [2].Trim ();
  94                                                 byte [] ipbytes = new byte [4];
  95                                                 if (gw_address.Length == 8 && iface.Equals (parts [0], StringComparison.OrdinalIgnoreCase)) {
  96                                                         for (int i = 0; i < 4; i++) {
  97                                                                 if (!Byte.TryParse (gw_address.Substring (i * 2, 2), NumberStyles.HexNumber, null, out ipbytes [3 - i]))
  98                                                                         continue;
  99                                                         }
 100                                                         IPAddress ip = new IPAddress (ipbytes);
 101                                                         if (!ip.Equals (IPAddress.Any))
 102                                                                 gateways.Add (ip);
 103                                                 }
 104                                         }
 105                                 }
 106                         } catch {
 107                         }
 108                 }
 109
 110                 static Regex ns = new Regex (@"\s*nameserver\s+(?<address>.*)");
 111                 static Regex search = new Regex (@"\s*search\s+(?<domain>.*)");
 112                 void ParseResolvConf ()
 113                 {
 114                         try {
 115                                 DateTime wt = File.GetLastWriteTime ("/etc/resolv.conf");
 116                                 if (wt <= last_parse)
 117                                         return;
 118
 119                                 last_parse = wt;
 120                                 dns_suffix = "";
 121                                 dns_servers = new IPAddressCollection ();
 122                                 using (StreamReader reader = new StreamReader ("/etc/resolv.conf")) {
 123                                         string str;
 124                                         string line;
 125                                         while ((line = reader.ReadLine ()) != null) {
 126                                                 line = line.Trim ();
 127                                                 if (line.Length == 0 || line [0] == '#')
 128                                                         continue;
 129                                                 Match match = ns.Match (line);
 130                                                 if (match.Success) {
 131                                                         try {
 132                                                                 str = match.Groups ["address"].Value;
 133                                                                 str = str.Trim ();
 134                                                                 dns_servers.Add (IPAddress.Parse (str));
 135                                                         } catch {
 136                                                         }
 137                                                 } else {
 138                                                         match = search.Match (line);
 139                                                         if (match.Success) {
 140                                                                 str = match.Groups ["domain"].Value;
 141                                                                 string [] parts = str.Split (',');
 142                                                                 dns_suffix = parts [0].Trim ();
 143                                                         }
 144                                                 }
 145                                         }
 146                                 }
 147                         } catch {
 148                         } finally {
 149                                 dns_servers.SetReadOnly ();
 150                         }
 151                 }
 152
 153                 public override IPAddressInformationCollection AnycastAddresses {
 154                         get {
 155                                 List<IPAddress> anycastAddresses = new List<IPAddress> ();
 156                                 /* XXX:
 157                                 foreach (IPAddress address in addresses) {
 158                                         if (is_anycast_address (address)) {
 159                                                 anycastAddresses.Add (address);
 160                                         }
 161                                 }
 162                                 */
 163                                 return IPAddressInformationImplCollection.LinuxFromAnycast (anycastAddresses);
 164                         }
 165                 }
 166
 167                 [MonoTODO ("Always returns an empty collection.")]
 168                 public override IPAddressCollection DhcpServerAddresses {
 169                         get {
 170                                 // There are lots of different DHCP clients
 171                                 // that all store their configuration differently.
 172                                 // I'm not sure what to do here.
 173                                 IPAddressCollection coll = new IPAddressCollection ();
 174                                 coll.SetReadOnly ();
 175                                 return coll;
 176                         }
 177                 }
 178
 179                 public override IPAddressCollection DnsAddresses {
 180                         get {
 181                                 ParseResolvConf ();
 182                                 return dns_servers;
 183                         }
 184                 }
 185
 186                 public override string DnsSuffix {
 187                         get {
 188                                 ParseResolvConf ();
 189                                 return dns_suffix;
 190                         }
 191                 }
 192
 193                 public override GatewayIPAddressInformationCollection GatewayAddresses {
 194                         get {
 195                                 ParseRouteInfo (this.iface.Name.ToString());
 196                                 if (gateways.Count > 0)
 197                                         return new LinuxGatewayIPAddressInformationCollection (gateways);
 198                                 else
 199                                         return LinuxGatewayIPAddressInformationCollection.Empty;
 200                         }
 201                 }
 202
 203                 [MonoTODO ("Always returns true")]
 204                 public override bool IsDnsEnabled {
 205                         get {
 206                                 return true;
 207                         }
 208                 }
 209
 210                 [MonoTODO ("Always returns false")]
 211                 public override bool IsDynamicDnsEnabled {
 212                         get {
 213                                 return false;
 214                         }
 215                 }
 216
 217                 public override MulticastIPAddressInformationCollection MulticastAddresses {
 218                         get {
 219                                 List<IPAddress> multicastAddresses = new List<IPAddress> ();
 220                                 foreach (IPAddress address in addresses) {
 221                                         byte[] addressBytes = address.GetAddressBytes ();
 222                                         if (addressBytes[0] >= 224 && addressBytes[0] <= 239) {
 223                                                 multicastAddresses.Add (address);
 224                                         }
 225                                 }
 226                                 return MulticastIPAddressInformationImplCollection.LinuxFromList (multicastAddresses);
 227                         }
 228                 }
 229
 230                 public override UnicastIPAddressInformationCollection UnicastAddresses {
 231                         get {
 232                                 List<IPAddress> unicastAddresses = new List<IPAddress> ();
 233                                 foreach (IPAddress address in addresses) {
 234                                         switch (address.AddressFamily) {
 235                                                 case AddressFamily.InterNetwork:
 236                                                         byte top = address.GetAddressBytes () [0];
 237                                                         if (top >= 224 && top <= 239)
 238                                                                 continue;
 239                                                         unicastAddresses.Add (address);
 240                                                         break;
 241
 242                                                 case AddressFamily.InterNetworkV6:
 243                                                         if (address.IsIPv6Multicast)
 244                                                                 continue;
 245                                                         unicastAddresses.Add (address);
 246                                                         break;
 247                                         }
 248                                 }
 249                                 return UnicastIPAddressInformationImplCollection.LinuxFromList (unicastAddresses);
 250                         }
 251                 }
 252
 253                 [MonoTODO ("Always returns an empty collection.")]
 254                 public override IPAddressCollection WinsServersAddresses {
 255                         get {
 256                                 // I do SUPPOSE we could scrape /etc/samba/smb.conf, but.. yeesh.
 257                                 return new IPAddressCollection ();
 258                         }
 259                 }
 260         }
 261
 262         class LinuxIPInterfaceProperties : UnixIPInterfaceProperties
 263         {
 264                 public LinuxIPInterfaceProperties (LinuxNetworkInterface iface, List <IPAddress> addresses)
 265                         : base (iface, addresses)
 266                 {
 267                 }
 268
 269                 public override IPv4InterfaceProperties GetIPv4Properties ()
 270                 {
 271                         if (ipv4iface_properties == null)
 272                                 ipv4iface_properties = new LinuxIPv4InterfaceProperties (iface as LinuxNetworkInterface);
 273
 274                         return ipv4iface_properties;
 275                 }
 276         }
 277
 278         class MacOsIPInterfaceProperties : UnixIPInterfaceProperties
 279         {
 280                 public MacOsIPInterfaceProperties (MacOsNetworkInterface iface, List <IPAddress> addresses)
 281                         : base (iface, addresses)
 282                 {
 283                 }
 284
 285                 public override IPv4InterfaceProperties GetIPv4Properties ()
 286                 {
 287                         if (ipv4iface_properties == null)
 288                                 ipv4iface_properties = new MacOsIPv4InterfaceProperties (iface as MacOsNetworkInterface);
 289
 290                         return ipv4iface_properties;
 291                 }
 292         }
 293
 294         class Win32IPInterfaceProperties2 : IPInterfaceProperties
 295         {
 296                 readonly Win32_IP_ADAPTER_ADDRESSES addr;
 297                 readonly Win32_MIB_IFROW mib4, mib6;
 298
 299                 public Win32IPInterfaceProperties2 (Win32_IP_ADAPTER_ADDRESSES addr, Win32_MIB_IFROW mib4, Win32_MIB_IFROW mib6)
 300                 {
 301                         this.addr = addr;
 302                         this.mib4 = mib4;
 303                         this.mib6 = mib6;
 304                 }
 305
 306                 public override IPv4InterfaceProperties GetIPv4Properties ()
 307                 {
 308                         Win32_IP_ADAPTER_INFO v4info = Win32NetworkInterface2.GetAdapterInfoByIndex (mib4.Index);
 309                         return v4info != null ? new Win32IPv4InterfaceProperties (v4info, mib4) : null;
 310                 }
 311
 312                 public override IPv6InterfaceProperties GetIPv6Properties ()
 313                 {
 314                         Win32_IP_ADAPTER_INFO v6info = Win32NetworkInterface2.GetAdapterInfoByIndex (mib6.Index);
 315                         return v6info != null ? new Win32IPv6InterfaceProperties (mib6) : null;
 316                 }
 317
 318                 public override IPAddressInformationCollection AnycastAddresses {
 319                         get { return IPAddressInformationImplCollection.Win32FromAnycast (addr.FirstAnycastAddress); }
 320                 }
 321
 322                 public override IPAddressCollection DhcpServerAddresses {
 323                         get {
 324                                 Win32_IP_ADAPTER_INFO v4info = Win32NetworkInterface2.GetAdapterInfoByIndex (mib4.Index);
 325                                 // FIXME: should ipv6 DhcpServer be considered?
 326                                 return v4info != null ? new Win32IPAddressCollection (v4info.DhcpServer) : Win32IPAddressCollection.Empty;
 327                         }
 328                 }
 329
 330                 public override IPAddressCollection DnsAddresses {
 331                         get { return Win32IPAddressCollection.FromDnsServer (addr.FirstDnsServerAddress); }
 332                 }
 333
 334                 public override string DnsSuffix {
 335                         get { return addr.DnsSuffix; }
 336                 }
 337
 338                 public override GatewayIPAddressInformationCollection GatewayAddresses {
 339                         get {
 340                                 Win32_IP_ADAPTER_INFO v4info = Win32NetworkInterface2.GetAdapterInfoByIndex (mib4.Index);
 341                                 // FIXME: should ipv6 DhcpServer be considered?
 342                                 return v4info != null ? new Win32GatewayIPAddressInformationCollection (v4info.GatewayList) : Win32GatewayIPAddressInformationCollection.Empty;
 343                         }
 344                 }
 345
 346                 public override bool IsDnsEnabled {
 347                         get { return Win32_FIXED_INFO.Instance.EnableDns != 0; }
 348                 }
 349
 350                 public override bool IsDynamicDnsEnabled {
 351                         get { return addr.DdnsEnabled; }
 352                 }
 353
 354                 public override MulticastIPAddressInformationCollection MulticastAddresses {
 355                         get { return MulticastIPAddressInformationImplCollection.Win32FromMulticast (addr.FirstMulticastAddress); }
 356                 }
 357
 358                 public override UnicastIPAddressInformationCollection UnicastAddresses {
 359                         get {
 360                                 Win32_IP_ADAPTER_INFO ai = Win32NetworkInterface2.GetAdapterInfoByIndex (mib4.Index);
 361                                 // FIXME: should ipv6 DhcpServer be considered?
 362                                 return ai != null ? UnicastIPAddressInformationImplCollection.Win32FromUnicast ((int) ai.Index, addr.FirstUnicastAddress) : UnicastIPAddressInformationImplCollection.Empty;
 363                         }
 364                 }
 365
 366                 public override IPAddressCollection WinsServersAddresses {
 367                         get {
 368                                 Win32_IP_ADAPTER_INFO v4info = Win32NetworkInterface2.GetAdapterInfoByIndex (mib4.Index);
 369                                 // FIXME: should ipv6 DhcpServer be considered?
 370                                 return v4info != null ? new Win32IPAddressCollection (v4info.PrimaryWinsServer, v4info.SecondaryWinsServer) : Win32IPAddressCollection.Empty;
 371                         }
 372                 }
 373
 374         }
 375 }
 376 #endif
 377