public static List<Hop> traceRoute(string ipAddrOrHostname, GatewayIPAddressInformation gateway, int minHops, int maxHops = 50, int timeout = 5000, byte[] buffer = null)
{
PingOptions pingOpts = new PingOptions();
Stopwatch watch = new Stopwatch();
//pingOpts.Ttl = 1; // only allow one hop initially
// create default buffer to send if not specified
if (buffer == null)
buffer = new byte[32];
List<Hop> hops = new List<Hop>();
// Always do the first hop, so we can verify expected route is being used;
// and if no interface was specified, well, its cheap anyway, since this is inside our PC
if (doPing(0, hops, pingOpts, watch, ipAddrOrHostname, timeout, buffer))
{
// check it
if (gateway!=null)
{
if (!gateway.Address.ToString().Equals(hops[0].ip))
{
MessageBox.Show("WARNING: First hop" + hops[0].ip
+ " didn't match intended gateway " + gateway.Address.ToString() + "; try 'route print'.");
}
}
}
else
{
// stop
if (gateway != null)
{
MessageBox.Show("Gateway " + gateway.Address.ToString() + " down?");
}
else
{
MessageBox.Show(hops[0].ip);
}
return hops;
}
if (minHops > 0)
{
// prefill
for (int i = 1; i < minHops; i++)
{
hops.Add(new Hop(i, "Dummy entry", -1, false));
}
}
int start = Math.Max(minHops, 1);
for (int i = start; i < maxHops; i++)
{
if (!doPing(i, hops, pingOpts, watch, ipAddrOrHostname, timeout , buffer)) {
// stop
break;
}
}
return hops;
}
private void traceBtn_Click(object sender, EventArgs e)
{
EndPoint theEndPoint = null;
foreach (EndPoint ep in endpoints)
{
if (ep.ToString().Equals(addrComboBox.Text))
{
theEndPoint = ep;
break;
}
}
if (theEndPoint == null)
{
theEndPoint = new EndPoint(addrComboBox.Text);
addrComboBox.Items.Add(theEndPoint);
endpoints.Add(theEndPoint);
}
hostOrIp = theEndPoint.HostOrIp;
// start traceroute if not already running, otherwise kill it.
if (!tracertBackgroundWorker.IsBusy)
{
// save user input here
nTraces = (int)nTraceUpDown.Value;
traceInterval = (double)traceIntUpDown.Value;
tStart = DateTime.Now;
tEnd = DateTime.Now;
networkInterface = getInterface((string)listBoxNetworkInterface.SelectedItem);
if (networkInterface != null)
{
// set the route
routeToDestination = NetworkInterfaceUtils.AddRoute(networkInterface, hostOrIp);
IPInterfaceProperties properties = networkInterface.GetIPProperties();
GatewayIPAddressInformationCollection gateways = properties.GatewayAddresses;
gateway = gateways[0]; // just use the first one
}
// clear any previously logged data
dates.Clear();
pings.Clear();
// start the traceroute in a separate thread
tracertBackgroundWorker.RunWorkerAsync();
// update form
traceBtn.Text = "Stop";
lblTarget.Text = hostOrIp;
lblStartTime.Text = tStart.ToString() + " to";
lblEndTime.Visible = true;
lblEndTime.Text = tEnd.ToString();
progressBar1.Visible = true;
}
else if (tracertBackgroundWorker.IsBusy)
{
tracertBackgroundWorker.CancelAsync();
traceBtn.Text = "Stopping...";
traceBtn.Enabled = false;
// Delete the route
if (routeToDestination != null)
{
NetworkInterfaceUtils.RemoveRoute(routeToDestination);
}
}
}
private Profile MatchNetwork(UnicastIPAddressInformation ipAddr, GatewayIPAddressInformation gw, byte[] addrBytes, byte[] maskBytes)
{
var maxConfidence = 0;
Profile result = null;
foreach (var item in _profiles)
{
var confidence = 6;
if (item.Subnet.Value == null)
confidence -= 1;
else if (!item.Subnet.Value.Equals(ipAddr.IPv4Mask))
confidence = 0;
if (item.IPAddress.Value == null)
{
confidence -= 1;
}
else
{
var compBytes = item.IPAddress.Value.GetAddressBytes();
for (var i = 0; i < compBytes.Length; i++)
{
if ((addrBytes[i] & maskBytes[i]) !=
(compBytes[i] & maskBytes[i]))
{
confidence = 0;
break;
}
}
}
if (item.Gateway.Value == null)
confidence -= 1;
else if (!item.Gateway.Value.Equals(gw.Address))
confidence = 0;
confidence = Math.Max(0, confidence);
if (confidence > maxConfidence)
{
maxConfidence = confidence;
result = item;
}
}
return result;
}
