static void Main(string[] args)
{
NdisApiDotNet ndisapi = new NdisApiDotNet(null);
Console.ResetColor();
Console.CancelKeyPress += HandleCancelKeyPress;
if (!ndisapi.IsDriverLoaded())
{
Console.WriteLine("WinpkFilter driver is not loaded. Exiting.");
return;
}
var vpnAdapter = NetworkAdapterHelper.GetVpnAdapter(ndisapi);
var normalAdapter = NetworkAdapterHelper.GetNormalAdapter(ndisapi);
var tableList = IpHelperWrapper.GetTcpConnections("firefox");
foreach (var line in tableList)
{
Console.WriteLine($"Source: {line.Local.Address} Port: {line.Local.Port} -> Destination: {line.Remote.Address} Port: {line.Remote.Port}");
}
Console.ReadLine();
LoadOutFilter(vpnAdapter.Handle, tableList);
LoadInFilter(normalAdapter.Handle, tableList);
LoadFilterEverythingElseFilter(vpnAdapter.Handle);
LoadFilterEverythingElseFilter(normalAdapter.Handle);
var loaded = ndisapi.SetPacketFilterTable(filterList);
outWorker.DoWork += (s, e) => { TreatOUTPacketsVPNtoNormal(ndisapi, vpnAdapter, normalAdapter); };
inWorker.DoWork += (s, e) => { TreatINPacketsNormaltoVPN(ndisapi, normalAdapter, vpnAdapter); };
Console.WriteLine("-- Filtering started");
outWorker.RunWorkerAsync();
inWorker.RunWorkerAsync();
Console.ReadLine();
Console.WriteLine("-- Filtering stopped");
DumpStaticFilters(ndisapi);
Console.WriteLine("Stopped!");
Console.ReadLine();
}
private static bool LoadIpv4DnsFilter(IntPtr adapterHandle)
{
var filterList = new List <StaticFilter>(3);
//
// Initialize static filters
//
// 1.Outgoing DNS requests filter: REDIRECT OUT UDP packets with destination PORT 53
filterList.Add(
new StaticFilter(
adapterHandle,
PACKET_FLAG.PACKET_FLAG_ON_SEND,
StaticFilter.FILTER_PACKET_ACTION.FILTER_PACKET_REDIRECT,
StaticFilter.STATIC_FILTER_FIELDS.NETWORK_LAYER_VALID | StaticFilter.STATIC_FILTER_FIELDS.TRANSPORT_LAYER_VALID,
null,
new IpAddressFilter(
AddressFamily.InterNetwork,
IpAddressFilter.IP_FILTER_FIELDS.IP_FILTER_PROTOCOL,
null,
null,
(byte)IPProtocolType.UDP
),
new TcpUdpFilter(
TcpUdpFilter.TCPUDP_FILTER_FIELDS.TCPUDP_DEST_PORT,
new TcpUdpFilter.PortRange {
startRange = 0, endRange = 0
},
new TcpUdpFilter.PortRange {
startRange = 53, endRange = 53
},
0)
));
// 2.Incoming DNS requests filter: REDIRECT IN UDP packets with source PORT 53
filterList.Add(
new StaticFilter(
adapterHandle,
PACKET_FLAG.PACKET_FLAG_ON_RECEIVE,
StaticFilter.FILTER_PACKET_ACTION.FILTER_PACKET_REDIRECT,
StaticFilter.STATIC_FILTER_FIELDS.NETWORK_LAYER_VALID | StaticFilter.STATIC_FILTER_FIELDS.TRANSPORT_LAYER_VALID,
null,
new IpAddressFilter(
AddressFamily.InterNetwork,
IpAddressFilter.IP_FILTER_FIELDS.IP_FILTER_PROTOCOL,
null,
null,
(byte)IPProtocolType.UDP
),
new TcpUdpFilter(
TcpUdpFilter.TCPUDP_FILTER_FIELDS.TCPUDP_SRC_PORT,
new TcpUdpFilter.PortRange {
startRange = 53, endRange = 53
},
new TcpUdpFilter.PortRange {
startRange = 0, endRange = 0
},
0)
));
// 3.Pass over everything else
filterList.Add(
new StaticFilter(
adapterHandle,
PACKET_FLAG.PACKET_FLAG_ON_SEND_RECEIVE,
StaticFilter.FILTER_PACKET_ACTION.FILTER_PACKET_PASS,
0,
null,
null,
null
));
// Load static filter into the driver
return(ndisapi.SetPacketFilterTable(filterList));
}
static void Main(string[] args)
{
NdisApiDotNet ndisapi = new NdisApiDotNet(null);
Console.ResetColor();
Console.CancelKeyPress += HandleCancelKeyPress;
if (!ndisapi.IsDriverLoaded())
{
Console.WriteLine("WinpkFilter driver is not loaded. Exiting.");
return;
}
var vpnAdapter = NetworkAdapterHelper.GetAdapterById(ndisapi, vpnAdapterID);
vpnIP = NetworkAdapterHelper.GetAdapterLocalIP(vpnAdapterID);
vpnMacAddress = NetworkAdapterHelper.GetAdapterPhisicalAddress(vpnAdapterID);
var normalAdapter = NetworkAdapterHelper.GetAdapterById(ndisapi, normalAdapterID);
localIp = NetworkAdapterHelper.GetAdapterLocalIP(normalAdapterID);
localMacAddress = NetworkAdapterHelper.GetAdapterPhisicalAddress(normalAdapterID);
Console.WriteLine($"======================================================================================");
Console.WriteLine($"Found Ethernet Adapter MAC: {localMacAddress} IP: {localIp}");
Console.WriteLine($"Found VPN Adapter MAC: {vpnMacAddress} IP: {vpnIP}");
Console.WriteLine($"======================================================================================");
if (vpnIP == null)
{
throw new Exception("VPN not connected");
}
var tableList = IpHelperWrapper.GetTcpConnections("firefox");
Console.WriteLine();
Console.WriteLine($"==============================FireFox sockets=========================================");
Console.WriteLine($"======================================================================================");
foreach (var line in tableList)
{
Console.WriteLine($"Source: {line.Local.Address} Port: {line.Local.Port} -> Destination: {line.Remote.Address} Port: {line.Remote.Port}");
}
Console.WriteLine($"======================================================================================");
Console.ReadLine();
LoadOutFilter(vpnAdapter.Handle, tableList);
LoadInFilter(normalAdapter.Handle, tableList);
//LoadTESTInFilter(normalAdapter.Handle, tableList);
//LoadTESTOutFilter(normalAdapter.Handle, tableList);
//LoadTESTInFilter(vpnAdapter.Handle, tableList);
LoadFilterEverythingElseFilter(vpnAdapter.Handle);
LoadFilterEverythingElseFilter(normalAdapter.Handle);
var loaded = ndisapi.SetPacketFilterTable(filterList);
outWorker.DoWork += (s, e) => { TreatOUTPacketsVPNtoNormal(ndisapi, vpnAdapter, normalAdapter); };
inWorker.DoWork += (s, e) => { TreatINPacketsNormaltoVPN(ndisapi, normalAdapter, vpnAdapter); };
Console.WriteLine("-- Filtering started");
outWorker.RunWorkerAsync();
inWorker.RunWorkerAsync();
Console.ReadLine();
Console.WriteLine("-- Filtering stopped");
DumpStaticFilters(ndisapi);
Console.WriteLine("Stopped!");
Console.ReadLine();
}