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

   1 //
   2 // System.Net.NetworkInformation.UnicastIPAddressInformation
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   6 //      Atsushi Enomoto (atsushi@ximian.com)
   7 //      Eric Butler (eric@extremeboredom.net)
   8 //
   9 // Copyright (c) 2006-2007 Novell, Inc. (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30 using System;
  31 using System.Runtime.InteropServices;
  32 using System.Net.Sockets;
  33 using System.Diagnostics.Contracts;
  34
  35 namespace System.Net.NetworkInformation {
  36 #if !MOBILE
  37         class Win32UnicastIPAddressInformation : UnicastIPAddressInformation
  38         {
  39                 Win32_IP_ADAPTER_UNICAST_ADDRESS info;
  40                 IPAddress ipv4Mask;
  41
  42                 public Win32UnicastIPAddressInformation (Win32_IP_ADAPTER_UNICAST_ADDRESS info)
  43                 {
  44                         this.info = info;
  45                         IPAddress ipAddress = info.Address.GetIPAddress ();
  46                         // IPv6 returns 0.0.0.0 for consistancy with XP
  47                         if (ipAddress.AddressFamily == AddressFamily.InterNetwork) {
  48                                 ipv4Mask = PrefixLengthToSubnetMask (info.OnLinkPrefixLength, ipAddress.AddressFamily);
  49                         }
  50                 }
  51
  52                 public override IPAddress Address {
  53                         get { return info.Address.GetIPAddress (); }
  54                 }
  55
  56                 public override bool IsDnsEligible {
  57                         get { return info.LengthFlags.IsDnsEligible; }
  58                 }
  59
  60                 public override bool IsTransient {
  61                         get { return info.LengthFlags.IsTransient; }
  62                 }
  63
  64                 // UnicastIPAddressInformation members
  65
  66                 public override long AddressPreferredLifetime {
  67                         get { return info.PreferredLifetime; }
  68                 }
  69
  70                 public override long AddressValidLifetime {
  71                         get { return info.ValidLifetime; }
  72                 }
  73
  74                 public override long DhcpLeaseLifetime {
  75                         get { return info.LeaseLifetime; }
  76                 }
  77
  78                 public override DuplicateAddressDetectionState DuplicateAddressDetectionState {
  79                         get { return info.DadState; }
  80                 }
  81
  82                 public override IPAddress IPv4Mask{
  83                         get {
  84                                 // The IPv6 equivilant was never available on XP, and we've kept this behavior for legacy reasons.
  85                                 // For IPv6 use PrefixLength instead.
  86                                 if (Address.AddressFamily != AddressFamily.InterNetwork) {
  87                                         return IPAddress.Any;
  88                                 }
  89
  90                                 return ipv4Mask;
  91                         }
  92                 }
  93
  94                 public override PrefixOrigin PrefixOrigin {
  95                         get { return info.PrefixOrigin; }
  96                 }
  97
  98                 public override SuffixOrigin SuffixOrigin {
  99                         get { return info.SuffixOrigin; }
 100                 }
 101
 102                 // Convert a CIDR prefix length to a subnet mask "255.255.255.0" format
 103                 private static IPAddress PrefixLengthToSubnetMask (byte prefixLength, AddressFamily family) {
 104                         Contract.Requires ((0 <= prefixLength) && (prefixLength <= 126));
 105                         Contract.Requires ((family == AddressFamily.InterNetwork) || (family == AddressFamily.InterNetworkV6));
 106
 107                         byte[] addressBytes;
 108                         if (family == AddressFamily.InterNetwork) {
 109                                 addressBytes = new byte [4];
 110                         } else { // v6
 111                                 addressBytes = new byte [16];
 112                         }
 113
 114                         Contract.Assert (prefixLength < (addressBytes.Length * 8));
 115
 116                         // Enable bits one at a time from left/high to right/low
 117                         for (int bit = 0; bit < prefixLength; bit++) {
 118                                 addressBytes [bit / 8] |= (byte) (0x80 >> (bit % 8));
 119                         }
 120
 121                         return new IPAddress (addressBytes);
 122                 }
 123         }
 124 #endif
 125
 126         class LinuxUnicastIPAddressInformation : UnicastIPAddressInformation
 127         {
 128                 IPAddress address;
 129                 IPAddress ipv4Mask;
 130
 131                 public LinuxUnicastIPAddressInformation (IPAddress address)
 132                 {
 133                         this.address = address;
 134                 }
 135
 136                 public override IPAddress Address {
 137                         get { return address; }
 138                 }
 139
 140                 public override bool IsDnsEligible {
 141                         get {
 142                                 byte[] addressBytes = address.GetAddressBytes ();
 143                                 return !(addressBytes[0] == 169 && addressBytes[1] == 254);
 144                         }
 145                 }
 146
 147                 [MonoTODO("Always returns false")]
 148                 public override bool IsTransient {
 149                         get { return false; }
 150                 }
 151
 152                 // UnicastIPAddressInformation members
 153
 154                 public override long AddressPreferredLifetime {
 155                         get { throw new NotImplementedException (); }
 156                 }
 157
 158                 public override long AddressValidLifetime {
 159                         get { throw new NotImplementedException (); }
 160                 }
 161
 162                 public override long DhcpLeaseLifetime {
 163                         get { throw new NotImplementedException (); }
 164                 }
 165
 166                 public override DuplicateAddressDetectionState DuplicateAddressDetectionState {
 167                         get { throw new NotImplementedException (); }
 168                 }
 169
 170                 public override IPAddress IPv4Mask {
 171                         get {
 172                                 // The IPv6 equivilant (for .net compatibility)
 173                                 if (Address.AddressFamily != AddressFamily.InterNetwork)
 174                                         return IPAddress.Any;
 175
 176                                 if (ipv4Mask == null)
 177                                         ipv4Mask = SystemNetworkInterface.GetNetMask (address);
 178
 179                                 return ipv4Mask;
 180                         }
 181                 }
 182
 183                 public override PrefixOrigin PrefixOrigin {
 184                         get { throw new NotImplementedException (); }
 185                 }
 186
 187                 public override SuffixOrigin SuffixOrigin {
 188                         get { throw new NotImplementedException (); }
 189                 }
 190         }
 191 }
 192