private SendQueue GeneratePackets(bool onClose)
{
var iface = PacketDispatcher.Instance.GetCurrentInterface();
var routingTable = IPv4Router.Instance.GetRoutingTable();
lock (routingTable)
{
if (routingTable.Count == 0)
{
return(null);
}
var gatewayMAC = routingTable[iface.IPv4Gateway];
var sendQueue = new SendQueue(64 * 4 * routingTable.Count);
foreach (var entry in routingTable)
{
// skip generating ARP replies for local gateway and local IP address entries
if (entry.Key.Equals(iface.IPv4Gateway) || entry.Key.Equals(iface.IPv4Address))
{
continue;
}
if (onClose)
{
// "friendly" ARP reply to gateway
sendQueue.Add(GenerateARPReply(entry.Key, entry.Value, iface.IPv4Gateway, gatewayMAC, iface.HardwareAddress).Bytes);
// "friendly" ARP reply to clients
sendQueue.Add(GenerateARPReply(iface.IPv4Gateway, gatewayMAC, entry.Key, entry.Value, iface.HardwareAddress).Bytes);
}
else
{
// fake ARP reply to gateway
sendQueue.Add(GenerateARPReply(entry.Key, iface.HardwareAddress, iface.IPv4Gateway, gatewayMAC).Bytes);
// fake ARP reply to clients
sendQueue.Add(GenerateARPReply(iface.IPv4Gateway, iface.HardwareAddress, entry.Key, entry.Value).Bytes);
}
}
return(sendQueue);
}
}
private async Task AckHandlerMethod(CancellationToken cancellationToken)
{
while (!cancellationToken.IsCancellationRequested)
{
try
{
// Send every three minutes
await Task.Delay(3 * 60 * 1000, cancellationToken);
// Don't run this time if there aren't any messages to acknowledge
if (!PendingAcks.Any())
{
continue;
}
// Take all the required acks out of the bag
var acks = new List <long>();
while (PendingAcks.TryTake(out var ack))
{
acks.Add(ack);
}
Logger.Log(Logger.Level.Debug, $"Found {acks.Count} messages that need acknowledgement. Adding them to the payload.");
// Create a request that contains the list of acks
var Acks_Request = new RequestState(Schema.msgs_ack(new { msg_ids = acks }));
// Add the request to both the send queue (to be sent to the server) and
// the sent acks queue (in case we need to resend. We don't want to place
// in pending since there shouldn't be a response.
SendQueue.Add(Acks_Request);
SentAcks.Put(Acks_Request);
// Send the acks to the server
// ToDo: If the user will be polling for updates, can we skip this line
// and let the acks be sent for us?
Task unawaited = Task.Run(() => ProcessSendQueue());
}
catch (TaskCanceledException)
{
// We don't really care if the task was cancelled.
break;
}
catch (ObjectDisposedException)
{
// We don't really care if the task was cancelled.
break;
}
catch (Exception ex)
{
// ToDo: Do we really want to skip all acks when this happens? Likely we
// will encounter the same error again if we reprocess...
Logger.Log(Logger.Level.Error, $"An error occurred process acks. Skipping.\n\n{ex.Message}");
}
}
}
private void InformSenderAboutFinish()
{
var msg = new Message
{
MsgType = MessageType.EndingProgram,
SendingServer = this.NodeAddress
};
var messageWrapper = new RemoteDispatch(msg, null);
SendQueue.Add(messageWrapper);
}
private static async Task <string> SendData(string Request)
{
var RequestObject = new RequestObject()
{
Request = Request,
Response = new TaskCompletionSource <string>()
};
SendQueue.Add(RequestObject);
return(await RequestObject.Response.Task);
}
// worker function for sending ARP requests
private void WorkerSender()
{
// get start/end IP
if (deviceInfo.Mask == "0.0.0.0")
{
deviceInfo.Mask = "255.255.255.0";
ShowInputDialog(ref deviceInfo.Mask);
}
long[] range = Network.MaskToStartEnd(deviceInfo.IP, deviceInfo.Mask);
long startIP = range[0];
long tot_endIP = range[1];
long currentIP = startIP;
int chunkSize = 16;
while (currentIP <= tot_endIP)
{
var possibilities = Math.Min((int)tot_endIP - (int)currentIP, chunkSize);
var endIP = currentIP + possibilities;
var sendQueue = new SendQueue(possibilities * 80);
// There are still losses in arp, try to send packet in chunks
var deviceIP = IPAddress.Parse(deviceInfo.IP);
// create ARP requests for all the hosts in our subnet);
while (currentIP <= endIP)
{
sendQueue.Add(GenerateARPRequest(Network.LongToIP(currentIP), deviceIP).Bytes);
currentIP++;
}
// send our queue
//sendQueue.Transmit(device, SendQueueTransmitModes.Normal);
// There are losses in ARP part, not sure why, try different timing for better accuracy
sendQueue.Transmit(device, SendQueueTransmitModes.Synchronized);
Thread.Sleep(1000);
}
Thread.Sleep(3000);
// stop other threads and stop scanning
Started = false;
workerARP.Join();
workerNDP.Join();
ScanCompleted();
return;
}
internal override void AddToSendQueue(Packet packet)
{
if (IsSendingQueue)
{
lock (SendTempQueueLock)
{
SendTempQueue?.Add(packet);
}
}
else
{
SendQueue?.Add(packet);
}
}
// worker for sending ARP reply packets
public void WorkerSender()
{
var sendQueue = new SendQueue((SpoofingTargets1.Count * 2 * 60) + 60);
foreach (Target target1 in SpoofingTargets1)
{
// send fake replies to the gateway
sendQueue.Add(GenerateARPReply(target1.IP, SpoofingTarget2.IP, SpoofingTarget2.PMAC).Bytes);
// senda fake replies to targets
sendQueue.Add(GenerateARPReply(SpoofingTarget2.IP, target1.IP, target1.PMAC).Bytes);
}
while (SpoofingStarted)
{
sendQueue.Transmit(device, SendQueueTransmitModes.Normal);
Thread.Sleep(2500);
}
sendQueue.Dispose();
return;
}
private void BarrierWithTimeout()
{
var msg = new Message
{
MsgType = MessageType.BarrierResponse,
SendingServer = NodeAddress,
};
foreach (var remoteAddress in RemoteAddressesList)
{
var respond = new RemoteDispatch(msg, remoteAddress);
SendQueue.Add(respond);
}
Console.WriteLine("Waiting on barrier");
if (!SyncBarrier.Wait(TimeSpan.FromSeconds(Timeout)))
{
throw new Exception("Barrier timeout");
}
}
// worker function for sending ARP requests
private void WorkerSender()
{
for (int i = 0; i < 3; i++)
{
// get start/end IP
long[] range = Network.MaskToStartEnd(deviceInfo.IP, deviceInfo.Mask);
long startIP = range[0];
long endIP = range[1];
long currentIP = startIP;
var possibilities = (int)endIP - (int)startIP;
var sendQueue = new SendQueue(possibilities * 80);
var deviceIP = IPAddress.Parse(deviceInfo.IP);
// create ARP requests for all the hosts in our subnet);
while (currentIP <= endIP)
{
sendQueue.Add(GenerateARPRequest(Network.LongToIP(currentIP), deviceIP).Bytes);
currentIP++;
}
// send our queue
sendQueue.Transmit(device, SendQueueTransmitModes.Normal);
Thread.Sleep(3000);
}
// stop other threads and stop scanning
Started = false;
workerARP.Join();
workerNDP.Join();
ScanCompleted();
return;
}
/// <summary>
/// Cleanly disconnects the server. Pending requests are placed back in a sending queue to be resent upon reconnection
/// </summary>
public void Disconnect()
{
// Close the connection superficially
CommunicationEstablished = false;
try
{
// Stop the ack processing loop.
Logger.Log <MTProtoSender>(Logger.Level.Debug, $"Trying to stop Ack Handler");
if (AckCancellation != null)
{
AckCancellation.Cancel();
}
if (AckHandler != null)
{
AckHandler.Wait();
}
// Close the connection to the server
// ToDo: Should we also dispose?
Connection.Disconnect();
// Remove any event handlers
Logger.Log <MTProtoSender>(Logger.Level.Debug, $"Removing event handlers");
Connection.DataReceivedEvent -= Connection_DataReceivedEvent;
// Place all the pending messages back in the queue to resend
// Note: Leave pending acks alone. We will pick up where we left off later
PendingQueue.Values.ToList().ForEach(x => SendQueue.Add(x));
PendingQueue.Clear();
}
catch (Exception ex)
{
Logger.Log(Logger.Level.Error, $"An error occurred while disconnecting.\n\n{ex.Message}");
}
}
private void PacketProcessor()
{
DebugInformation.WriteLine("[PD] Packet processor started.");
var localPacketBuffer = new List <EthernetPacket>();
var packetBytes = 0;
while (started)
{
EthernetPacket rawPacket;
// wait if there haven't been any new packets put into queue
packetsAvailable.WaitOne();
// get packets from queue and add them to the local buffer
while (packetBuffer.TryDequeue(out rawPacket) && rawPacket != null)
{
localPacketBuffer.Add(rawPacket);
packetBytes += rawPacket.BytesHighPerformance.BytesLength;
// add 16 bytes | TODO: find out why there are always 16 more bytes needed for each packet
packetBytes += 16;
}
packetsAvailable.Reset();
var packetQueue = new SendQueue(packetBytes * packetRouters.Count);
// loop through local packet buffer
foreach (var packet in localPacketBuffer)
{
// skip local packets
if (iface.IsLocalIPv4Packet(packet))
{
continue;
}
// send to packet readers
foreach (IPacketReader reader in packetReaders)
{
reader.ReadPacket(packet);
}
// send to packet filters, skip routing step for filtered packets
lock (packetFilters)
{
foreach (IPacketFilter filter in packetFilters)
{
if (filter.Enabled && filter.FilterPacket(packet))
{
continue;
}
}
}
// send to packet routers
foreach (IPacketRouter router in packetRouters)
{
var routedPacket = router.RoutePacket(packet);
if (routedPacket != null)
{
packetQueue.Add(routedPacket.Bytes);
}
}
}
// send out all the routed packets
packetQueue.TransmitAll(iface.PcapDevice);
localPacketBuffer.Clear();
packetBytes = 0;
}
DebugInformation.WriteLine("[PD] Packet processor stopped.");
}
// worker function for routing IPv6 packets
public void WorkerRouter()
{
while (SpoofingStarted)
{
// size of packets - needed for send queue (set some starting value - it seems the length is not set correctly during threadQueue packet copying)
int bufferSize = 2048;
// copy packets to threadRoutingQueue
lock (PacketQueueRouting)
{
foreach (Packet packet in PacketQueueRouting)
{
threadQueueRouting.Add(packet);
bufferSize += packet.Bytes.Length;
}
PacketQueueRouting.Clear();
}
if (threadQueueRouting.Count > 0)
{
var sendQueue = new SendQueue(bufferSize);
// loop through packets and change MAC addresses
foreach (Packet packet in threadQueueRouting)
{
if (packet == null)
{
continue;
}
var ethernetPacket = (packet as EthernetPacket);
if (ethernetPacket == null)
{
continue;
}
var ip = (packet is IpPacket ? (IpPacket)packet : IpPacket.GetEncapsulated(packet));
var sourceIP = ip.SourceAddress.ToString();
var destinationIP = ip.DestinationAddress.ToString();
var destinationMAC = ethernetPacket.DestinationHwAddress.ToString();
if (sourceIP == deviceInfo.IPv6 || destinationIP == deviceInfo.IPv6)
{
continue;
}
// skip local network traffic
if ((sourceIP.Contains(prefix.Replace("::", ":")) && destinationIP.Contains(prefix.Replace("::", ":"))) || (sourceIP.Contains("fe80::") || destinationIP.Contains("fe80::")))
{
continue;
}
// check for IPv6 - MAC entry existance (check only addresses from this network) and add it if necessary (we need this because scanner cannot pick up IPv6 addresses of all the targets)
if (sourceIP.Contains(prefix.Replace("::", ":")) && !IPv6toMACTargets.ContainsKey(sourceIP) && !sourceIP.Contains("fe80::"))
{
lock (IPv6toMACTargets)
{
IPv6toMACTargets.Add(sourceIP, ethernetPacket.SourceHwAddress);
}
}
// incoming packets (internet -> nighthawk) - change destination MAC back to target's MAC
if (IPv6toMACTargets.ContainsKey(destinationIP) && (destinationMAC != IPv6toMACTargets[destinationIP].ToString()))
{
ethernetPacket.SourceHwAddress = physicalAddress;
ethernetPacket.DestinationHwAddress = IPv6toMACTargets[destinationIP];
if (ethernetPacket.Bytes != null)
{
sendQueue.Add(packet.Bytes);
}
}
// outgoing packets (targets -> nighthawk) - change destination MAC to gateway's MAC
if (IPv6toMACTargets.ContainsKey(sourceIP) && (destinationMAC != IPv6toMACTargets[gatewayIPv6].ToString()))
{
ethernetPacket.SourceHwAddress = physicalAddress;
ethernetPacket.DestinationHwAddress = IPv6toMACTargets[gatewayIPv6];
if (ethernetPacket.Bytes != null)
{
sendQueue.Add(packet.Bytes);
}
}
}
sendQueue.Transmit(device, SendQueueTransmitModes.Normal);
sendQueue.Dispose();
threadQueueRouting.Clear();
}
else
{
Thread.Sleep(1);
}
}
return;
}
public void Send(string content, UInt16 port, string address)
{
SuzukiMessage msg = new SuzukiMessage(content, port, address);
SendQueue.Add(msg);
}
// worker for routing IPv4 packets
public void WorkerRouter()
{
while (SpoofingStarted)
{
// size of packets - needed for send queue (set some starting value - it seems the length is not set correctly during threadQueue packet copying)
int bufferSize = 2048;
// copy packets to thread's packet storage (threadRoutingQueue)
lock (PacketQueueRouting)
{
foreach (Packet packet in PacketQueueRouting)
{
threadQueueRouting.Add(packet);
bufferSize += packet.Bytes.Length;
}
PacketQueueRouting.Clear();
}
if (threadQueueRouting.Count > 0)
{
var sendQueue = new SendQueue(bufferSize);
// loop through packets and change MAC addresses
foreach (Packet packet in threadQueueRouting)
{
if (packet == null)
{
continue;
}
var ethernetPacket = (packet as EthernetPacket);
if (ethernetPacket == null)
{
continue;
}
var ip = (packet is IpPacket ? (IpPacket)packet : IpPacket.GetEncapsulated(packet));
// discard invalid packets
if (ip is IPv4Packet && (((IPv4Packet)ip).Checksum == 0 || !((IPv4Packet)ip).ValidIPChecksum))
{
continue;
}
var sourceIP = ip.SourceAddress.ToString();
var destinationIP = ip.DestinationAddress.ToString();
var sourceMAC = ethernetPacket.SourceHwAddress.ToString();
var destinationMAC = ethernetPacket.DestinationHwAddress.ToString();
if (destinationMAC == sourceMAC)
{
continue;
}
// block PPTP if necessary (exclude local computer)
if (blockPPTP && sourceIP != deviceInfo.IP && destinationIP != deviceInfo.IP)
{
// block GRE
if (ip.Protocol == IPProtocolType.GRE)
{
continue;
}
// check for port 1723 and block it
if (ip.Protocol == IPProtocolType.TCP)
{
var tcp = TcpPacket.GetEncapsulated(packet);
if (tcp != null && (tcp.SourcePort == 1723 || tcp.DestinationPort == 1723))
{
continue;
}
}
}
// incoming packets - change destination MAC back to target's MAC
if (IPtoMACTargets1.ContainsKey(destinationIP) && (destinationMAC != IPtoMACTargets1[destinationIP].ToString()))
{
ethernetPacket.SourceHwAddress = physicalAddress;
ethernetPacket.DestinationHwAddress = IPtoMACTargets1[destinationIP];
if (ethernetPacket.Bytes != null)
{
sendQueue.Add(packet.Bytes);
}
}
// outgoing packets - change destination MAC to gateway's MAC
if (IPtoMACTargets1.ContainsKey(sourceIP) && (destinationMAC != SpoofingTarget2.PMAC.ToString()))
{
ethernetPacket.SourceHwAddress = physicalAddress;
ethernetPacket.DestinationHwAddress = SpoofingTarget2.PMAC;
if (ethernetPacket.Bytes != null)
{
sendQueue.Add(packet.Bytes);
}
}
}
sendQueue.Transmit(device, SendQueueTransmitModes.Normal);
sendQueue.Dispose();
threadQueueRouting.Clear();
}
else
{
Thread.Sleep(1);
}
}
return;
}
public void Send(byte[] packet, bool dontCompress = false)
{
SendQueue.Add(SendArgs, packet, dontCompress);
}
static void Main(string[] args)
{
//显示SharpPcap版本
string ver = SharpPcap.Version.VersionString;
Console.WriteLine("SharpPcap {0}", ver);
//获取网络设备
var devices = LivePcapDeviceList.Instance;
if (devices.Count < 1)
{
Console.WriteLine("找不到网络设备");
return;
}
Console.WriteLine();
Console.WriteLine("以下是目前本计算机上的活动网络设备:");
Console.WriteLine("----------------------------------------------------");
Console.WriteLine();
int i = 0;
foreach (LivePcapDevice dev in devices)
{
Console.WriteLine("{0}) {1} {2}", i, dev.Name, dev.Description);
i++;
}
//选择要监听的网络设备
Console.WriteLine();
Console.Write("-- 请选择一个需要监听的网络设备: ");
i = int.Parse(Console.ReadLine());
LivePcapDevice device = devices[i];
Console.Write("-- 请选择操作：监听通讯[C/c]，多线程监听通讯[T/t]，监听统计[F/f]，发送随机数据包[S/s]? ");
string resp = Console.ReadLine().ToUpper();
while (!(resp.StartsWith("C") || resp.StartsWith("F") || resp.StartsWith("T") || resp.StartsWith("S")))
{
resp = Console.ReadLine().ToUpper();
}
try
{
if (resp.StartsWith("C") || resp.StartsWith("F") || resp.StartsWith("T"))
{
//监听过滤条件
//string filter = "ip and tcp";
string filter = "";
//连接设备
System.Threading.Thread backgroundThread = null;
int readTimeoutMilliseconds = 1000;
if (resp.StartsWith("F"))
{
device.Open(DeviceMode.Promiscuous, readTimeoutMilliseconds);
device.SetFilter(filter);
device.Mode = CaptureMode.Statistics; //抓包统计
device.OnPcapStatistics += new StatisticsModeEventHandler(device_OnPcapStatistics); //抓包统计回调事件
}
else if (resp.StartsWith("C"))
{
device.Open(DeviceMode.Promiscuous, readTimeoutMilliseconds);
device.SetFilter(filter);
device.Mode = CaptureMode.Packets; //抓数据包
showDetails = resp.EndsWith("-A"); //当抓数据包时，检查是否要查看详情
device.OnPacketArrival += new PacketArrivalEventHandler(device_OnPacketArrival); //抓数据包回调事件
}
else
{
backgroundThread = new System.Threading.Thread(BackgroundThread);
backgroundThread.Start();
device.Open();
device.SetFilter(filter);
device.Mode = CaptureMode.Packets; //抓数据包
showDetails = resp.EndsWith("-A"); //当抓数据包时，检查是否要查看详情
device.OnPacketArrival += new PacketArrivalEventHandler(device_OnThreadPacketArrival); //抓数据包回调事件
}
Console.WriteLine();
Console.WriteLine("-- 当前TCPdump过滤条件: \"{0}\"", filter);
Console.WriteLine("-- 正在监听设备 {0}, 按 '回车' 键以停止监听...", device.Description);
//开始监听
device.StartCapture();
//停止监听
Console.ReadLine();
device.StopCapture();
Console.WriteLine("-- 停止监听.");
if (backgroundThread != null)
{
BackgroundThreadStop = true;
backgroundThread.Join();
}
}
else if (resp.StartsWith("S"))
{
//连接设备
device.Open();
//生成随机数据包
byte[] bytes = GetRandomPacket();
try
{
//发送数据
device.SendPacket(bytes);
SendQueue squeue = new SendQueue(2000);
Console.WriteLine("-- 单个数据包发送成功.");
for (int j = 0; j < 10; j++)
{
if (!squeue.Add(bytes))
{
Console.WriteLine("-- 警告: 队列大小不足以存放所有数据包，将只发送部分数据包.");
break;
}
}
device.SendQueue(squeue, SendQueueTransmitModes.Synchronized);
Console.WriteLine("-- 数据包队列发送完毕.");
}
catch (Exception e)
{
Console.WriteLine("-- " + e.Message);
}
}
}
catch (Exception e)
{
Console.WriteLine("-- " + e.Message);
}
finally
{
if (device.Opened)
{
//断开设备连接
Console.WriteLine(device.Statistics().ToString());
device.Close();
Console.WriteLine("-- 断开设备连接.");
Console.Write("按 '回车' 键以退出...");
Console.Read();
}
}
}