/// <summary>
/// Sends packet by calling core functions
/// </summary>
/// <param name="packet">Packet to send</param>
/// <param name="countToSend">Count to send</param>
/// <param name="timeToWaitBeforeNextPacketToSend">Time to wait until sending next packet in milliseconds</param>
public void SendPacket(INewPacket packet, int countToSend = 1, int timeToWaitBeforeNextPacketToSend = 0)
{
if (packet is null)
{
throw new ArgumentNullException(nameof(packet));
}
if (_allDevices == null ||
_allDevices.Count == 0)
{
throw new InvalidOperationException("No devices found on local machine to send packets with");
}
int userChosenDevice = LetUserChooseInterfaceBeforeWorkingWithPackets();
PacketDevice selectedDevice = _allDevices[userChosenDevice - 1];
using (PacketCommunicator communicator = selectedDevice.Open(65535,
PacketDeviceOpenAttributes.NoCaptureLocal,
1000))
{
for (uint i = 0; i < countToSend; i++)
{
communicator.SendPacket(packet.BuildPacket(true, i));
_userExperience.UserTextDisplayer.PrintText($"Sended packet nr {i + 1}...");
PauseBeforeSendingPacket(timeToWaitBeforeNextPacketToSend);
}
}
}
/// <summary>
/// Starts program core logic, goes through all steps, one by one
/// </summary>
/// <param name="inputData">User input data to work with during logic</param>
public void ProcessLogic(UserInputData inputData)
{
if (inputData == null)
{
throw new ArgumentNullException(nameof(inputData));
}
if (inputData.IsSendPacket &&
!inputData.IsInterceptAndForward)
{
Packet packet = _fileHandler.TryOpenUserPacketFromFile(inputData.PathToFile);
if (packet == null)
{
throw new InvalidOperationException(nameof(packet) + " was null");
}
INewPacket customPacket = _packetManager.GetPacketByProtocol(packet.Ethernet.IpV4.Protocol).ExtractLayers(packet);
if (inputData.IsModifyPacket)
{
customPacket.ModifyLayers();
}
_packetManager.SendPacket(customPacket, inputData.PacketCountToSend, inputData.TimeToWaitUntilNextPacketWillBeSended);
if (inputData.IsUserWantsToSavePacket)
{
_fileHandler.TrySaveOnePacketToDisk(customPacket.BuildPacket(false));
}
}
if (inputData.IsInterceptAndForward)
{
_packetManager.InterceptAndForwardPackets(inputData);
}
}
/// <summary>
/// Copies Modules from specified packet to current packet (if values are not default)
/// </summary>
/// <param name="toCopyFrom"></param>
/// <returns>New packet with copied values</returns>
public override INewPacket CopyModulesFrom(INewPacket source)
{
CustomIcmpPacket toCopyFrom = source as CustomIcmpPacket;
this.EthernetLayer = _layerExchanger.AssignUserValuesFromFilledLayerToOtherLayer(toCopyFrom.EthernetLayer, this.EthernetLayer);
this.IpV4Layer = _layerExchanger.AssignUserValuesFromFilledLayerToOtherLayer(toCopyFrom.IpV4Layer, this.IpV4Layer);
this.IcmpLayer = _layerExchanger.AssignUserValuesFromFilledLayerToOtherLayer(toCopyFrom.IcmpLayer, this.IcmpLayer);
return this;
}
/// <summary>
/// Sends provided packet by ip and mac address which is set in packet
/// </summary>
/// <param name="packet">Packet to send</param>
/// <param name="countToSend">Count to send</param>
public void SendPacket(INewPacket packet, int countToSend, int timeToWaitUntilNextPacketSend)
{
if (packet is null)
{
throw new ArgumentNullException(nameof(packet));
}
_packetSender.SendPacket(packet, countToSend, timeToWaitUntilNextPacketSend);
}
private uint Initialize(Assembly ConsumerAssembly, uint ApiVersion)
{
// locate IDhcpServerCalloutConsumer
var consumer = ConsumerAssembly.GetTypes()
.Where(t =>
typeof(ICalloutConsumer).IsAssignableFrom(t) &&
!t.IsValueType &&
!t.IsAbstract &&
t.GetConstructor(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, Type.EmptyTypes, null) != null)
.FirstOrDefault();
if (consumer == null)
{
return(0xBU); // assembly does not implement consumer
}
consumerInstance = (ICalloutConsumer)Activator.CreateInstance(consumer);
if (consumerInstance is INewPacket newPacketHandler)
{
this.newPacketHandler = newPacketHandler;
}
if (consumerInstance is IPacketDrop packetDropHandler)
{
this.packetDropHandler = packetDropHandler;
}
if (consumerInstance is IPacketSend packetSendHandler)
{
this.packetSendHandler = packetSendHandler;
}
if (consumerInstance is IAddressDelete addressDeleteHandler)
{
this.addressDeleteHandler = addressDeleteHandler;
}
if (consumerInstance is IAddressOffer addressOfferHandler)
{
this.addressOfferHandler = addressOfferHandler;
}
if (consumerInstance is IHandleOptions handleOptionsHandler)
{
this.handleOptionsHandler = handleOptionsHandler;
}
if (consumerInstance is IDeleteClient deleteClientHandler)
{
this.deleteClientHandler = deleteClientHandler;
}
// call consumer initialize
consumerInstance.Initialize((int)ApiVersion);
return(0x0U); // ERROR_SUCCESS
}
/// <summary>
/// Automodifies packet for further sending
/// </summary>
/// <param name="toCopyTo">Packet to copy to user values</param>
/// <param name="packetToCopyFrom">Packet to copy from</param>
/// <returns>Packet with user values, that can be sended to web</returns>
private Packet AutoModifyPacket(Packet toCopyTo, INewPacket packetToCopyFrom)
{
// replaces 'Packet' with modifiable custom packet, so it would be possible to swap layers/modules
INewPacket packetToCopyTo = _packetFactory.GetPacketByProtocol(toCopyTo.Ethernet.IpV4.Protocol).ExtractLayers(toCopyTo);
return(packetToCopyTo != null
? packetToCopyTo.CopyModulesFrom(packetToCopyFrom).BuildPacket(false)
: null);
}
/// <summary>
/// Gets user packet with values to copy from to other packets
/// </summary>
/// <param name="isFilteringByProtocolEnabled">If filtering is enabled, then autosending is possible</param>
/// <returns>New packet with ONLY user values in it, all other values are set to default state</returns>
private INewPacket GetPacketFilledWithUserValuesToCopyFrom(IpV4Protocol ipV4Protocol, bool isSendingEnabled)
{
INewPacket packetWithUserValuesToModify = _packetFactory.GetPacketByProtocol(ipV4Protocol)
.ModifyLayers(); // Give user default packet to fill with his values, so we would know, what values to modify in all other packets
_userExperience.UserTextDisplayer.PrintText("Now all packets will be modified according to changed values in new packet, press any key to continue...");
if (!isSendingEnabled)
{
_userExperience.UserTextDisplayer.PrintText("NOTE: Packet sending is disabled, modified packets will NOT be sended!");
}
Console.ReadKey();
return(packetWithUserValuesToModify);
}
/// <summary>
/// Copy packet modules from one to other
/// </summary>
/// <param name="toCopyFrom">Source packet to copy from</param>
/// <param name="toCopyTo">Packet to copy to</param>
/// <returns>Packet with copied modules</returns>
public INewPacket CopyModifiedModulesFromModifiedPacketToNewPacket(INewPacket toCopyFrom, INewPacket toCopyTo)
{
return(toCopyTo.CopyModulesFrom(toCopyFrom));
}
/// <summary>
/// Intercepts and forwards packets to web
/// </summary>
public void InterceptAndForwardPackets(UserInputData userInput)
{
INewPacket packetToCopyFrom = default;
bool isAutoModifyPackets = false;
bool isFilterEnabled = false;
int packetCountGoneThroughDevice = 0;
int selectedOutputDevice = LetUserChooseInterfaceBeforeWorkingWithPackets();
PacketDevice device = _allDevices[selectedOutputDevice - 1]; // - 1 because of array
using (PacketCommunicator inputCommunicator = device.Open(65535, PacketDeviceOpenAttributes.Promiscuous, 1000))
{
if (inputCommunicator.DataLink.Kind != DataLinkKind.Ethernet)
{
_userExperience.UserTextDisplayer.PrintTextAndExit("Only ethernet networks are supported");
}
using (PacketCommunicator outputCommunicator = device.Open(65535, PacketDeviceOpenAttributes.Promiscuous, 1000))
{
if (!string.IsNullOrWhiteSpace(userInput.PacketFilterProtocol))
{
inputCommunicator.SetFilter(userInput.PacketFilterProtocol.ToLower());
outputCommunicator.SetFilter(userInput.PacketFilterProtocol.ToLower());
isFilterEnabled = true;
}
while (inputCommunicator.ReceivePacket(out Packet packet) != PacketCommunicatorReceiveResult.Eof)
{
if (packet == null)
{
continue;
}
if (packetCountGoneThroughDevice > 10) // for hint to be seen always, and not to cause too much mess in console
{
_userExperience.UserTextDisplayer.ClearConsole();
_userExperience.UserTextDisplayer.PrintText("-M to modify one packet");
_userExperience.UserTextDisplayer.PrintText("-A to automatically modify packets");
_userExperience.UserTextDisplayer.PrintText("-P to pause");
packetCountGoneThroughDevice = 0;
}
_userExperience.UserTextDisplayer.ShowPacketBaseInfo(packet);
if (Console.KeyAvailable) // if user pressed key, then does manipulation with packets
{
ConsoleKeyInfo choice = Console.ReadKey(true);
switch (choice.Key)
{
case ConsoleKey.A: // modify every packet using user saved settings if filter is enabled
if (isFilterEnabled)
{
packetToCopyFrom = GetPacketFilledWithUserValuesToCopyFrom(packet.Ethernet.IpV4.Protocol, userInput.IsSendPacket);
isAutoModifyPackets = (packetToCopyFrom != null);
}
else
{
_userExperience.UserTextDisplayer.PrintText("NOTE: You can't automodify packets without protocol filtering");
}
break;
case ConsoleKey.M: // modify one packet in normal way
packet = _packetFactory.GetPacketByProtocol(packet.Ethernet.IpV4.Protocol).ModifyLayers().BuildPacket(true, 0);
break;
case ConsoleKey.P:
_userExperience.UserTextDisplayer.PrintText("PAUSED");
_userExperience.UserInputHandler.WaitForUserToPressKey();
break;
}
}
if (isAutoModifyPackets)
{
Packet autoModifiedPacket = AutoModifyPacket(packet, packetToCopyFrom);
if (autoModifiedPacket != null)
{
packet = autoModifiedPacket;
}
}
if (userInput.IsUserWantsToSavePacket)
{
_fileHandler.TrySaveOnePacketToDisk(packet);
}
if (userInput.IsSendPacket)
{
outputCommunicator.SendPacket(packet);
}
packetCountGoneThroughDevice++;
}
}
}
}
/// <summary> /// Copies Modules from specified packet to current packet (if values are not default) /// </summary> /// <param name="toCopyFrom"></param> /// <returns>New packet with copied values</returns> public abstract INewPacket CopyModulesFrom(INewPacket toCopyFrom);
