C# Signature:
[StructLayout(LayoutKind.Sequential)]
struct MIB_IPNETROW
{
/// <summary>
/// The index of the adapter.
/// </summary>
public int dwIndex;
/// <summary>
/// The length, in bytes, of the physical address.
/// </summary>
public int dwPhysAddrLen;
/// <summary>
/// The physical address.
/// </summary>
[MarshalAs(UnmanagedType.ByValArray, SizeConst=IPHelper.MAXLEN_PHYSADDR)]
public byte[] bPhysAddr;
/// <summary>
/// The IPv4 address.
/// </summary>
public int dwAddr;
/// <summary>
/// The type of ARP entry. This type can be one of the following values.
/// </summary>
public IPNetRowType dwType;
}
User-Defined Types:
public class IPHelper
{
public const int NO_ERROR = 0;
/// <summary>
/// The buffer pointed to by the pIpNetTable parameter is not large enough.
/// The required size is returned in the DWORD variable pointed to
/// by the pdwSize parameter.
/// </summary>
public const int ERROR_INSUFFICIENT_BUFFER = 122;
/// <summary>
/// An invalid parameter was passed to the function. This error is returned
/// if the pdwSize parameter is NULL, or GetIpNetTable is unable to write
/// to the memory pointed to by the pdwSize parameter.
/// </summary>
public const int ERROR_INVALID_PARAMETER = 87;
/// <summary>
/// The IPv4 transport is not configured on the local computer.
/// </summary>
public const int ERROR_NOT_SUPPORTED = 50;
public const int MAXLEN_PHYSADDR = 8;
/// <summary>
/// The GetIpNetTable function retrieves the IP-to-physical address mapping table.
/// </summary>
/// <param name="pIpNetTable">A pointer to a buffer that receives the
/// IP-to-physical address mapping table as a MIB_IPNETTABLE structure.</param>
/// <param name="pdwSize">On input, specifies the size of the buffer pointed to
/// by the pIpNetTable parameter.
/// <para>On output, if the buffer is not large enough to hold the returned mapping table,
/// the function sets this parameter equal to the required buffer size</para></param>
/// <param name="bOrder">A Boolean value that specifies whether the returned mapping
/// table should be sorted in ascending order by IP address. If this parameter is TRUE,
/// the table is sorted.</param>
/// <returns>If the function succeeds, the return value is NO_ERROR.
/// <para>If the function fails, the return value is one of the following error codes:
/// ERROR_INSUFFICIENT_BUFFER, ERROR_INVALID_PARAMETER, ERROR_NOT_SUPPORTED or other code.
/// </para>
/// </returns>
[DllImport("Iphlpapi.dll", EntryPoint="GetIpNetTable")]
private static extern int GetIpNetTable(IntPtr pIpNetTable, ref int pdwSize, bool bOrder);
}
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Notes:
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Sample Code:
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