public static void DeleteRoute(Ip4RouteEntry routeEntry)
{
var route = new NativeMethods.MIB_IPFORWARDROW
{
dwForwardDest = BitConverter.ToUInt32(IPAddress.Parse(routeEntry.DestinationIP.ToString()).GetAddressBytes(), 0),
dwForwardMask = BitConverter.ToUInt32(IPAddress.Parse(routeEntry.SubnetMask.ToString()).GetAddressBytes(), 0),
dwForwardNextHop = BitConverter.ToUInt32(IPAddress.Parse(routeEntry.GatewayIP.ToString()).GetAddressBytes(), 0),
dwForwardMetric1 = 99,
dwForwardType = Convert.ToUInt32(3), //Default to 3
dwForwardProto = Convert.ToUInt32(3), //Default to 3
dwForwardAge = 0,
dwForwardIfIndex = Convert.ToUInt32(routeEntry.InterfaceIndex)
};
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(NativeMethods.MIB_IPFORWARDROW)));
try
{
Marshal.StructureToPtr(route, ptr, false);
var status = NativeMethods.DeleteIpForwardEntry(ptr);
}
finally
{
Marshal.FreeHGlobal(ptr);
}
}
public static void CreateRoute(string destination, string mask, int interfaceIndex, int metric)
{
NetworkAdaptor adaptor = NicInterface.GetNetworkAdaptor(interfaceIndex);
var route = new NativeMethods.MIB_IPFORWARDROW
{
dwForwardDest = BitConverter.ToUInt32(IPAddress.Parse(destination).GetAddressBytes(), 0),
dwForwardMask = BitConverter.ToUInt32(IPAddress.Parse(mask).GetAddressBytes(), 0),
dwForwardNextHop = BitConverter.ToUInt32(IPAddress.Parse(adaptor.PrimaryGateway.ToString()).GetAddressBytes(), 0),
dwForwardMetric1 = Convert.ToUInt32(metric),
dwForwardType = Convert.ToUInt32(3), //Default to 3
dwForwardProto = Convert.ToUInt32(3), //Default to 3
dwForwardAge = 0,
dwForwardIfIndex = Convert.ToUInt32(interfaceIndex)
};
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(NativeMethods.MIB_IPFORWARDROW)));
try
{
Marshal.StructureToPtr(route, ptr, false);
var status = NativeMethods.CreateIpForwardEntry(ptr);
}
finally
{
Marshal.FreeHGlobal(ptr);
}
}
