IPv4InterfaceProperties.cs :  » 2.6.4-mono-.net-core » System.Net » System » Net » NetworkInformation » C# / CSharp Open Source

//
// System.Net.NetworkInformation.IPv4InterfaceProperties
//
// Authors:
//  Gonzalo Paniagua Javier (gonzalo@novell.com)
//  Atsushi Enomoto (atsushi@ximian.com)
//      Marek Habersack (mhabersack@novell.com)
//
// Copyright (c) 2006-2007 Novell, Inc. (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#if NET_2_0
using System.IO;
using System.Runtime.InteropServices;

namespace System.Net.NetworkInformation{
  public abstract class IPv4InterfaceProperties {
    protected IPv4InterfaceProperties ()
    {
    }

    public abstract int Index { get; }
    public abstract bool IsAutomaticPrivateAddressingActive { get; }
    public abstract bool IsAutomaticPrivateAddressingEnabled { get; }
    public abstract bool IsDhcpEnabled { get; }
    public abstract bool IsForwardingEnabled { get; }
    public abstract int Mtu { get; }
    public abstract bool UsesWins { get; }
  }

  abstract class UnixIPv4InterfaceProperties : IPv4InterfaceProperties
  {
    protected UnixNetworkInterface iface;
    
    public UnixIPv4InterfaceProperties (UnixNetworkInterface iface)
    {
      this.iface = iface;
    }
    
    public override int Index {
      get { return UnixNetworkInterface.IfNameToIndex (iface.Name); }
    }

    // TODO: how to discover that?
    public override bool IsAutomaticPrivateAddressingActive {
      get { return false; }
    }

    // TODO: how to discover that?
    public override bool IsAutomaticPrivateAddressingEnabled {
      get { return false; }
    }

    // TODO: how to discover that? The only way is distribution-specific...
    public override bool IsDhcpEnabled {
      get { return false; }
    }
  
    public override bool UsesWins {
      get { return false; }
    }
  }
  
  sealed class LinuxIPv4InterfaceProperties : UnixIPv4InterfaceProperties
  {
    public LinuxIPv4InterfaceProperties (LinuxNetworkInterface iface)
      : base (iface)
    {
    }
    
    public override bool IsForwardingEnabled {
      get {
        string iface_path = "/proc/sys/net/ipv4/conf/" + iface.Name + "/forwarding";

        if (File.Exists (iface_path)) {
          string val = NetworkInterface.ReadLine (iface_path);

          return val != "0";
        }

        return false;
      }
    }

    public override int Mtu {
      get {
        string iface_path = (iface as LinuxNetworkInterface).IfacePath + "mtu";
        int ret = 0;

        if (File.Exists (iface_path)) {
          string val = NetworkInterface.ReadLine (iface_path);
          
          try {
            ret = Int32.Parse (val);
          } catch {
          }
        }

        return ret;
            
      }
    }
  }

  sealed class MacOsIPv4InterfaceProperties : UnixIPv4InterfaceProperties
  {
    public MacOsIPv4InterfaceProperties (MacOsNetworkInterface iface)
      : base (iface)
    {
    }

    // dummy
    public override bool IsForwardingEnabled {
      get { return false; }
    }

    // dummy
    public override int Mtu {
      get { return 0; }
    }
  }
  
  sealed class Win32IPv4InterfaceProperties : IPv4InterfaceProperties
  {
    [DllImport ("iphlpapi.dll")]
    static extern int GetPerAdapterInfo (int IfIndex, Win32_IP_PER_ADAPTER_INFO pPerAdapterInfo, ref int pOutBufLen);

    Win32_IP_ADAPTER_INFO ainfo;
    Win32_IP_PER_ADAPTER_INFO painfo;
    Win32_MIB_IFROW mib;

    public Win32IPv4InterfaceProperties (Win32_IP_ADAPTER_INFO ainfo, Win32_MIB_IFROW mib)
    {
      this.ainfo = ainfo;
      this.mib = mib;

      // get per-adapter info.
      int size = 0;
      GetPerAdapterInfo (mib.Index, null, ref size);
      painfo = new Win32_IP_PER_ADAPTER_INFO ();
      int ret = GetPerAdapterInfo (mib.Index, painfo, ref size);
      if (ret != 0)
        throw new NetworkInformationException (ret);
    }

    public override int Index {
      get { return mib.Index; }
    }

    public override bool IsAutomaticPrivateAddressingActive {
      get { return painfo.AutoconfigActive != 0; }
    }

    public override bool IsAutomaticPrivateAddressingEnabled {
      get { return painfo.AutoconfigEnabled != 0; }
    }

    public override bool IsDhcpEnabled {
      get { return ainfo.DhcpEnabled != 0; }
    }

    public override bool IsForwardingEnabled {
      // Is it the right answer? In Vista there is MIB_IPINTERFACEROW.ForwardingEnabled, but not in former versions.
      get { return Win32_FIXED_INFO.Instance.EnableRouting != 0; }
    }

    public override int Mtu {
      get { return mib.Mtu; }
    }

    public override bool UsesWins {
      get { return ainfo.HaveWins; }
    }
  }

  [StructLayout (LayoutKind.Sequential)]
  class Win32_IP_PER_ADAPTER_INFO
  {
    public uint AutoconfigEnabled;
    public uint AutoconfigActive;
    public IntPtr CurrentDnsServer; // to Win32_IP_ADDR_STRING
    public Win32_IP_ADDR_STRING DnsServerList;
  }
}
#endif