public static List<Ip4RouteEntry> GetRouteTable()
{
var fwdTable = IntPtr.Zero;
int size = 0;
var result = NativeMethods.GetIpForwardTable(fwdTable, ref size, true);
fwdTable = Marshal.AllocHGlobal(size);
result = NativeMethods.GetIpForwardTable(fwdTable, ref size, true);
var forwardTable = ReadIPForwardTable(fwdTable);
Marshal.FreeHGlobal(fwdTable);
List<Ip4RouteEntry> routeTable = new List<Ip4RouteEntry>();
for (int i = 0; i < forwardTable.Table.Length; ++i)
{
Ip4RouteEntry entry = new Ip4RouteEntry();
entry.DestinationIP = new IPAddress((long)forwardTable.Table[i].dwForwardDest);
entry.SubnetMask = new IPAddress((long)forwardTable.Table[i].dwForwardMask);
entry.GatewayIP = new IPAddress((long)forwardTable.Table[i].dwForwardNextHop);
entry.InterfaceIndex = Convert.ToInt32(forwardTable.Table[i].dwForwardIfIndex);
entry.ForwardType = Convert.ToInt32(forwardTable.Table[i].dwForwardType);
entry.ForwardProtocol = Convert.ToInt32(forwardTable.Table[i].dwForwardProto);
entry.ForwardAge = Convert.ToInt32(forwardTable.Table[i].dwForwardAge);
entry.Metric = Convert.ToInt32(forwardTable.Table[i].dwForwardMetric1);
routeTable.Add(entry);
}
return routeTable;
}
public static void Test()
{
NicInterface.PrintAllNetworkInterface();
Console.Read();
ShowNetworkInfo();
Console.Read();
Ip4RouteTable.RoutePrint(Ip4RouteTable.GetRouteTable());
Console.Read();
Ip4RouteEntry routeEntry = new Ip4RouteEntry
{
DestinationIP = IPAddress.Parse("202.0.0.0"),
SubnetMask = IPAddress.Parse("255.0.0.0"),
GatewayIP = IPAddress.Parse("10.33.55.1"),
InterfaceIndex = 11
};
//Ip4RouteTable.CreateRoute(routeEntry);
Ip4RouteTable.DeleteRoute(42);
Ip4RouteTable.CreateRoute("202.0.0.0", "255.0.0.0", 42, 100);
Console.Read();
Ip4RouteTable.RoutePrint(Ip4RouteTable.GetRouteTable());
Console.Read();
//Ip4RouteTable.DeleteRoute(routeEntry);
}
static void Main(string[] args)
{
try
{
//Get Parameter
int interfaceIndex = 0;
if (args.Count() > 0)
{
interfaceIndex = Int32.Parse(args[0]);
}
//Print all the Network adaptors
NicInterface.PrintAllNetworkInterface();
//Print the Routing Table
Ip4RouteTable.RoutePrint();
if (!Ip4RouteTable.InterfaceIndexExists(interfaceIndex))
{
Console.WriteLine("InterfaceIndex '{0}' does not exists.", interfaceIndex);
return;
}
//Determine if the Route Table has multiple 1.1.1.1 routes, indicating a VPN is active
if (!Ip4RouteTable.RouteExists("1.1.1.1"))
{
return;
}
//Demostrate Deleting routes and Adding routes
Ip4RouteEntry routeEntry = Ip4RouteTable.GetRouteEntry("1.1.1.1").First();
//NetworkAdaptor na = NicInterface.GetNetworkAdaptor(interfaceIndex);
if (routeEntry != null && routeEntry.GatewayIP.ToString().Length > 0)
{
Console.WriteLine("Deleting VPN existing routes.");
Ip4RouteTable.DeleteRoute(interfaceIndex);
Ip4RouteTable.DeleteRoute("202.0.0.0");
Console.WriteLine("Adding VPN new route.");
Ip4RouteTable.CreateRoute("202.0.0.0", "255.0.0.0", interfaceIndex, 100);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
Console.WriteLine(ex.StackTrace.ToString());
throw;
}
}
public IpRouteTable GetRouteTable()
{
var fwdTable = IntPtr.Zero;
var size = 0;
var result = NetworkHelper.GetIpForwardTable(fwdTable, ref size, true);
fwdTable = Marshal.AllocHGlobal(size);
result = NetworkHelper.GetIpForwardTable(fwdTable, ref size, true);
var forwardTable = (Ip4RouteTable.IPForwardTable)Marshal.PtrToStructure(fwdTable, typeof(Ip4RouteTable.IPForwardTable));
var table = new Ip4RouteTable.PMIB_IPFORWARDROW[forwardTable.Size];
var p = new IntPtr(fwdTable.ToInt64() + Marshal.SizeOf(forwardTable.Size));
for (var i = 0; i < forwardTable.Size; ++i)
{
table[i] = (Ip4RouteTable.PMIB_IPFORWARDROW)Marshal.PtrToStructure(p, typeof(Ip4RouteTable.PMIB_IPFORWARDROW));
p = new IntPtr(p.ToInt64() + Marshal.SizeOf(typeof(Ip4RouteTable.PMIB_IPFORWARDROW)));
}
forwardTable.Table = table;
Marshal.FreeHGlobal(fwdTable);
var routeTable = new IpRouteTable {
RouteTable = new List <Ip4RouteEntry>()
};
for (var i = 0; i < forwardTable.Table.Length; ++i)
{
var entry = new Ip4RouteEntry
{
DestinationIP = new IPAddress(forwardTable.Table[i].dwForwardDest),
SubnetMask = new IPAddress(forwardTable.Table[i].dwForwardMask),
GatewayIP = new IPAddress(forwardTable.Table[i].dwForwardNextHop),
InterfaceIndex = Convert.ToInt32(forwardTable.Table[i].dwForwardIfIndex),
ForwardType = Convert.ToInt32(forwardTable.Table[i].dwForwardType),
ForwardProtocol = Convert.ToInt32(forwardTable.Table[i].dwForwardProto),
ForwardAge = Convert.ToInt32(forwardTable.Table[i].dwForwardAge),
Metric = Convert.ToInt32(forwardTable.Table[i].dwForwardMetric1)
};
routeTable.RouteTable.Add(entry);
}
return(routeTable);
}
