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 #if NET_2_0
  31 using System.IO;
  32 using System.Runtime.InteropServices;
  33
  34 namespace System.Net.NetworkInformation {
  35         public abstract class IPv4InterfaceProperties {
  36                 protected IPv4InterfaceProperties ()
  37                 {
  38                 }
  39
  40                 public abstract int Index { get; }
  41                 public abstract bool IsAutomaticPrivateAddressingActive { get; }
  42                 public abstract bool IsAutomaticPrivateAddressingEnabled { get; }
  43                 public abstract bool IsDhcpEnabled { get; }
  44                 public abstract bool IsForwardingEnabled { get; }
  45                 public abstract int Mtu { get; }
  46                 public abstract bool UsesWins { get; }
  47         }
  48
  49         sealed class LinuxIPv4InterfaceProperties : IPv4InterfaceProperties
  50         {
  51                 LinuxNetworkInterface iface;
  52
  53                 public LinuxIPv4InterfaceProperties (LinuxNetworkInterface iface)
  54                 {
  55                         this.iface = iface;
  56                 }
  57
  58                 public override int Index {
  59                         get { return LinuxNetworkInterface.IfNameToIndex (iface.Name); }
  60                 }
  61
  62                 // TODO: how to discover that?
  63                 public override bool IsAutomaticPrivateAddressingActive {
  64                         get { return false; }
  65                 }
  66
  67                 // TODO: how to discover that?
  68                 public override bool IsAutomaticPrivateAddressingEnabled {
  69                         get { return false; }
  70                 }
  71
  72                 // TODO: how to discover that? The only way is distribution-specific...
  73                 public override bool IsDhcpEnabled {
  74                         get { return false; }
  75                 }
  76
  77                 public override bool IsForwardingEnabled {
  78                         get {
  79                                 string iface_path = "/proc/sys/net/ipv4/conf/" + iface.Name + "/forwarding";
  80
  81                                 if (File.Exists (iface_path)) {
  82                                         string val = NetworkInterface.ReadLine (iface_path);
  83
  84                                         return val != "0";
  85                                 }
  86
  87                                 return false;
  88                         }
  89                 }
  90                 public override int Mtu {
  91                         get {
  92                                 string iface_path = iface.IfacePath + "mtu";
  93                                 int ret = 0;
  94
  95                                 if (File.Exists (iface_path)) {
  96                                         string val = NetworkInterface.ReadLine (iface_path);
  97
  98                                         try {
  99                                                 ret = Int32.Parse (val);
 100                                         } catch {
 101                                         }
 102                                 }
 103
 104                                 return ret;
 105
 106                         }
 107                 }
 108
 109                 public override bool UsesWins {
 110                         get { return false; }
 111                 }
 112         }
 113
 114         sealed class Win32IPv4InterfaceProperties : IPv4InterfaceProperties
 115         {
 116                 [DllImport ("iphlpapi.dll")]
 117                 static extern int GetPerAdapterInfo (int IfIndex, Win32_IP_PER_ADAPTER_INFO pPerAdapterInfo, ref int pOutBufLen);
 118
 119                 Win32_IP_ADAPTER_INFO ainfo;
 120                 Win32_IP_PER_ADAPTER_INFO painfo;
 121                 Win32_MIB_IFROW mib;
 122
 123                 public Win32IPv4InterfaceProperties (Win32_IP_ADAPTER_INFO ainfo, Win32_MIB_IFROW mib)
 124                 {
 125                         this.ainfo = ainfo;
 126                         this.mib = mib;
 127
 128                         // get per-adapter info.
 129                         int size = 0;
 130                         GetPerAdapterInfo (mib.Index, null, ref size);
 131                         painfo = new Win32_IP_PER_ADAPTER_INFO ();
 132                         int ret = GetPerAdapterInfo (mib.Index, painfo, ref size);
 133                         if (ret != 0)
 134                                 throw new NetworkInformationException (ret);
 135                 }
 136
 137                 public override int Index {
 138                         get { return mib.Index; }
 139                 }
 140
 141                 public override bool IsAutomaticPrivateAddressingActive {
 142                         get { return painfo.AutoconfigActive != 0; }
 143                 }
 144
 145                 public override bool IsAutomaticPrivateAddressingEnabled {
 146                         get { return painfo.AutoconfigEnabled != 0; }
 147                 }
 148
 149                 public override bool IsDhcpEnabled {
 150                         get { return ainfo.DhcpEnabled != 0; }
 151                 }
 152
 153                 public override bool IsForwardingEnabled {
 154                         // Is it the right answer? In Vista there is MIB_IPINTERFACEROW.ForwardingEnabled, but not in former versions.
 155                         get { return Win32_FIXED_INFO.Instance.EnableRouting != 0; }
 156                 }
 157
 158                 public override int Mtu {
 159                         get { return mib.Mtu; }
 160                 }
 161
 162                 public override bool UsesWins {
 163                         get { return ainfo.HaveWins; }
 164                 }
 165         }
 166
 167         [StructLayout (LayoutKind.Sequential)]
 168         class Win32_IP_PER_ADAPTER_INFO
 169         {
 170                 public uint AutoconfigEnabled;
 171                 public uint AutoconfigActive;
 172                 public IntPtr CurrentDnsServer; // to Win32_IP_ADDR_STRING
 173                 public Win32_IP_ADDR_STRING DnsServerList;
 174         }
 175 }
 176 #endif
 177