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//
// 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.
//
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;
}
}
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