public static void Start(CancellationToken cancellationToken)
{
IPAddress localAddress = null;
Socket listeningSocket = null;
PingResults results = new PingResults();
int bufferSize = 4096;
// Find local address
localAddress = IPAddress.Parse(Lookup.GetLocalAddress());
try {
// Create listener socket
listeningSocket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Icmp);
listeningSocket.Bind(new IPEndPoint(localAddress, 0));
listeningSocket.IOControl(IOControlCode.ReceiveAll, new byte[] { 1, 0, 0, 0 }, new byte[] { 1, 0, 0, 0 }); // Set SIO_RCVALL flag to socket IO control
listeningSocket.ReceiveBufferSize = bufferSize;
Display.ListenIntroMsg(localAddress.ToString());
// Listening loop
while (!cancellationToken.IsCancellationRequested)
{
byte[] buffer = new byte[bufferSize];
// Recieve any incoming ICMPv4 packets
EndPoint remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
int bytesRead = Helper.RunWithCancellationToken(() => listeningSocket.ReceiveFrom(buffer, ref remoteEndPoint), cancellationToken);
ICMP response = new ICMP(buffer, bytesRead);
// Display captured packet
Display.CapturedPacket(response, remoteEndPoint.ToString(), DateTime.Now.ToString("h:mm:ss.ff tt"), bytesRead);
// Store results
results.CountPacketType(response.Type);
results.Received++;
}
}
catch (OperationCanceledException) {
}
catch (SocketException) {
Display.Error("Could not read packet from socket");
}
catch (Exception e) {
Display.Error($"General exception occured while trying to create listening socket (Exception: {e.GetType().ToString().Split('.').Last()}");
}
// Clean up
listeningSocket.Close();
// TODO: Implement ListenResults method
//Display.ListenResults(results);
}
public static void ListenForICMPOnAddress(IPAddress address)
{
Socket listeningSocket = null;
PingResults results = new PingResults();
int bufferSize = 4096;
// Create listener socket
try
{
listeningSocket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Icmp);
listeningSocket.Bind(new IPEndPoint(address, 0));
listeningSocket.IOControl(IOControlCode.ReceiveAll, new byte[] { 1, 0, 0, 0 }, new byte[] { 1, 0, 0, 0 }); // Set SIO_RCVALL flag to socket IO control
listeningSocket.ReceiveBufferSize = bufferSize;
} catch (Exception e) {
Display.Error($"Exception occured while trying to create listening socket for {address.ToString()} ({e.GetType().ToString().Split('.').Last()})");
return;
}
Display.ListenIntroMsg(address.ToString());
// Listening loop
while (true)
{
byte[] buffer = new byte[bufferSize];
try {
// Recieve any incoming ICMPv4 packets
EndPoint remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
int bytesRead = listeningSocket.ReceiveFrom(buffer, ref remoteEndPoint);
ICMP response = new ICMP(buffer, bytesRead);
// Display captured packet
Display.CapturedPacket(address.ToString(), response, remoteEndPoint.ToString(), DateTime.Now.ToString("h:mm:ss.ff tt"), bytesRead);
// Store results
results.CountPacketType(response.Type);
results.Received++;
} catch (OperationCanceledException) {
} catch (SocketException) {
Display.Error("Could not read packet from socket");
}
}
listeningSocket.Close();
}
