/// <summary>
/// Returns objects that describe the network interfaces on the local computer.
/// </summary>
/// <returns>A <see cref="NetworkInterface"/> array that contains objects that describe the available network interfaces, or an empty array if no interfaces are detected.</returns>
/// <remarks>
/// The network interfaces on a computer provide network connectivity.
/// Network interfaces are also known as network adapters.
/// <list type="table"><listheader><term>Platforms Supported</term><description></description></listheader>
/// <item><term>Windows Mobile</term><description>Windows Mobile Version 5.0 and later</description></item>
/// <item><term>Windows Embedded Compact</term><description>Windows CE .NET 4.1 and later</description></item>
/// </list>
/// </remarks>
public static NetworkInterface[] GetAllNetworkInterfaces()
{
if (!NativeMethods.hasIphlp)
{
return(new NetworkInterface[0] {
});
}
int size = 0;
int result = NativeMethods.GetInterfaceInfo(IntPtr.Zero, ref size);
IntPtr ptr = Marshal.AllocHGlobal(size);
result = NativeMethods.GetInterfaceInfo(ptr, ref size);
int numAdapters = Marshal.ReadInt32(ptr);
NetworkInterface[] interfaces = new NetworkInterface[numAdapters];
for (int i = 0; i < numAdapters; i++)
{
NativeMethods.IP_ADAPTER_INDEX_MAP aim = (NativeMethods.IP_ADAPTER_INDEX_MAP)Marshal.PtrToStructure(IntPtrInTheHand.Add(ptr, 4 + (i * 260)), typeof(NativeMethods.IP_ADAPTER_INDEX_MAP));
NativeMethods.MIB_IFROW row = new NativeMethods.MIB_IFROW();
row.dwIndex = aim.Index;
result = NativeMethods.GetIfEntry(ref row);
interfaces[i] = new NetworkInterface(aim.Name, row);
}
Marshal.FreeHGlobal(ptr);
return(interfaces);
}
internal IPv4InterfaceStatistics(uint index)
{
this.ifRow = new NativeMethods.MIB_IFROW();
this.ifRow.dwIndex = index;
int result = NativeMethods.GetIfEntry(ref this.ifRow);
if (result < 0)
{
throw new NetworkInformationException(result);
}
}
private NetworkInterface(string name, NativeMethods.MIB_IFROW row)
{
this.row = row;
this.name = name;
if (row.dwDescrLen > 0)
{
this.description = System.Text.Encoding.ASCII.GetString(row.bDescr, 0, row.dwDescrLen);
int nullIndex = this.description.IndexOf('\0');
if (nullIndex > -1)
{
this.description = this.description.Substring(0, nullIndex);
}
}
}
internal IPv4InterfaceStatistics(NativeMethods.MIB_IFROW row)
{
this.ifRow = row;
}
private IPv4InterfaceStatistics()
{
this.ifRow = new NativeMethods.MIB_IFROW();
}
