mcs/class/System/System.Net.NetworkInformation/IPv4InterfaceProperties.cs

   1 //
   2 // System.Net.NetworkInformation.IPv4InterfaceProperties
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   6 //      Atsushi Enomoto (atsushi@ximian.com)
   7 //      Marek Habersack (mhabersack@novell.com)
   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.IO;
  31 using System.Runtime.InteropServices;
  32
  33 namespace System.Net.NetworkInformation {
  34         public abstract class IPv4InterfaceProperties {
  35                 protected IPv4InterfaceProperties ()
  36                 {
  37                 }
  38
  39                 public abstract int Index { get; }
  40                 public abstract bool IsAutomaticPrivateAddressingActive { get; }
  41                 public abstract bool IsAutomaticPrivateAddressingEnabled { get; }
  42                 public abstract bool IsDhcpEnabled { get; }
  43                 public abstract bool IsForwardingEnabled { get; }
  44                 public abstract int Mtu { get; }
  45                 public abstract bool UsesWins { get; }
  46         }
  47
  48         abstract class UnixIPv4InterfaceProperties : IPv4InterfaceProperties
  49         {
  50                 protected UnixNetworkInterface iface;
  51
  52                 public UnixIPv4InterfaceProperties (UnixNetworkInterface iface)
  53                 {
  54                         this.iface = iface;
  55                 }
  56
  57                 public override int Index {
  58                         get { return UnixNetworkInterface.IfNameToIndex (iface.Name); }
  59                 }
  60
  61                 // TODO: how to discover that?
  62                 public override bool IsAutomaticPrivateAddressingActive {
  63                         get { return false; }
  64                 }
  65
  66                 // TODO: how to discover that?
  67                 public override bool IsAutomaticPrivateAddressingEnabled {
  68                         get { return false; }
  69                 }
  70
  71                 // TODO: how to discover that? The only way is distribution-specific...
  72                 public override bool IsDhcpEnabled {
  73                         get { return false; }
  74                 }
  75
  76                 public override bool UsesWins {
  77                         get { return false; }
  78                 }
  79         }
  80
  81         sealed class LinuxIPv4InterfaceProperties : UnixIPv4InterfaceProperties
  82         {
  83                 public LinuxIPv4InterfaceProperties (LinuxNetworkInterface iface)
  84                         : base (iface)
  85                 {
  86                 }
  87
  88                 public override bool IsForwardingEnabled {
  89                         get {
  90                                 string iface_path = "/proc/sys/net/ipv4/conf/" + iface.Name + "/forwarding";
  91
  92                                 if (File.Exists (iface_path)) {
  93                                         string val = NetworkInterface.ReadLine (iface_path);
  94
  95                                         return val != "0";
  96                                 }
  97
  98                                 return false;
  99                         }
 100                 }
 101
 102                 public override int Mtu {
 103                         get {
 104                                 string iface_path = (iface as LinuxNetworkInterface).IfacePath + "mtu";
 105                                 int ret = 0;
 106
 107                                 if (File.Exists (iface_path)) {
 108                                         string val = NetworkInterface.ReadLine (iface_path);
 109
 110                                         try {
 111                                                 ret = Int32.Parse (val);
 112                                         } catch {
 113                                         }
 114                                 }
 115
 116                                 return ret;
 117
 118                         }
 119                 }
 120         }
 121
 122         sealed class MacOsIPv4InterfaceProperties : UnixIPv4InterfaceProperties
 123         {
 124                 public MacOsIPv4InterfaceProperties (MacOsNetworkInterface iface)
 125                         : base (iface)
 126                 {
 127                 }
 128
 129                 // dummy
 130                 public override bool IsForwardingEnabled {
 131                         get { return false; }
 132                 }
 133
 134                 // dummy
 135                 public override int Mtu {
 136                         get { return 0; }
 137                 }
 138         }
 139
 140         sealed class Win32IPv4InterfaceProperties : IPv4InterfaceProperties
 141         {
 142                 [DllImport ("iphlpapi.dll")]
 143                 static extern int GetPerAdapterInfo (int IfIndex, Win32_IP_PER_ADAPTER_INFO pPerAdapterInfo, ref int pOutBufLen);
 144
 145                 Win32_IP_ADAPTER_INFO ainfo;
 146                 Win32_IP_PER_ADAPTER_INFO painfo;
 147                 Win32_MIB_IFROW mib;
 148
 149                 public Win32IPv4InterfaceProperties (Win32_IP_ADAPTER_INFO ainfo, Win32_MIB_IFROW mib)
 150                 {
 151                         this.ainfo = ainfo;
 152                         this.mib = mib;
 153
 154                         // get per-adapter info.
 155                         int size = 0;
 156                         GetPerAdapterInfo (mib.Index, null, ref size);
 157                         painfo = new Win32_IP_PER_ADAPTER_INFO ();
 158                         int ret = GetPerAdapterInfo (mib.Index, painfo, ref size);
 159                         if (ret != 0)
 160                                 throw new NetworkInformationException (ret);
 161                 }
 162
 163                 public override int Index {
 164                         get { return mib.Index; }
 165                 }
 166
 167                 public override bool IsAutomaticPrivateAddressingActive {
 168                         get { return painfo.AutoconfigActive != 0; }
 169                 }
 170
 171                 public override bool IsAutomaticPrivateAddressingEnabled {
 172                         get { return painfo.AutoconfigEnabled != 0; }
 173                 }
 174
 175                 public override bool IsDhcpEnabled {
 176                         get { return ainfo.DhcpEnabled != 0; }
 177                 }
 178
 179                 public override bool IsForwardingEnabled {
 180                         // Is it the right answer? In Vista there is MIB_IPINTERFACEROW.ForwardingEnabled, but not in former versions.
 181                         get { return Win32_FIXED_INFO.Instance.EnableRouting != 0; }
 182                 }
 183
 184                 public override int Mtu {
 185                         get { return mib.Mtu; }
 186                 }
 187
 188                 public override bool UsesWins {
 189                         get { return ainfo.HaveWins; }
 190                 }
 191         }
 192
 193         [StructLayout (LayoutKind.Sequential)]
 194         class Win32_IP_PER_ADAPTER_INFO
 195         {
 196                 public uint AutoconfigEnabled;
 197                 public uint AutoconfigActive;
 198                 public IntPtr CurrentDnsServer; // to Win32_IP_ADDR_STRING
 199                 public Win32_IP_ADDR_STRING DnsServerList;
 200         }
 201 }
 202