private void updateTableRow(Hop curHop, ListViewItem curItem)
{
// if prev ip != cur ip
if (curItem.SubItems[1].Text != curHop.ip.ToString())
{
curItem.SubItems[1].Text = curHop.ip.ToString();
}
// if prev time != cur time
if (curItem.SubItems[2].Text != curHop.time.ToString())
curItem.SubItems[2].Text = curHop.time.ToString();
// color code pings
Color bg = curItem.SubItems[2].BackColor;
if (curHop.time <= MAX_PING_MS_GREEN && curHop.time != -1 && bg != Color.Lime) {
curItem.SubItems[2].BackColor = Color.Lime;
} else if (curHop.time > MAX_PING_MS_GREEN && curHop.time <= MAX_PING_MS_YELLOW && bg != Color.Yellow) {
curItem.SubItems[2].BackColor = Color.Yellow;
}
else if (curHop.time > MAX_PING_MS_YELLOW || curHop.time == -1 && bg != Color.Red)
{
curItem.SubItems[2].BackColor = Color.Red;
}
}
// only do this for the last hop
private void updateCounters(Hop hop)
{
if (hop.time <= MAX_PING_MS_GREEN && hop.time >= 0)
{
this.counterGreen++;
}
else if (hop.time > MAX_PING_MS_GREEN && hop.time <= MAX_PING_MS_YELLOW)
{
this.counterYellow++;
}
else
{
this.counterRed++;
}
}
private void updateLastTableRow(Hop curHop)
{
ListViewItem curItem = routeListView.Items[routeListView.Items.Count-1];
updateTableRow(curHop, curItem);
updateCounters(curHop);
}
private static bool doPing(int hopNum, List<Hop> hops, PingOptions pingOpts, Stopwatch watch,
string ipAddrOrHostname, int timeout , byte[] buffer)
{
pingOpts.Ttl = hopNum+1;
// send ping and hop, and keep track of the time it takes
Ping pinger = new Ping();
watch.Reset();
watch.Start();
// make sure that the address is a valid one
PingReply reply;
try
{
reply = pinger.Send(ipAddrOrHostname, timeout, buffer, pingOpts);
}
catch (PingException e)
{
hops.Add(new Hop(hopNum, "Request timed out", -1, true));
//break;
return false;
}
watch.Stop();
// catch and fix timed out hops
Hop curHop;
if (reply.Status != IPStatus.TimedOut)
curHop = new Hop(hopNum, reply.Address.ToString(), watch.ElapsedMilliseconds, false);
else
curHop = new Hop(hopNum, "Request timed out", -1, true);
hops.Add(curHop);
// destination reached
if (reply.Status == IPStatus.Success)
{
//break;
return false;
}
return true;
}
