public static ArgsInfo Resolve(string[] args)
{
try
{
return(new ArgsInfo()
{
Destination = NamesResolver.Resolve(args[0]),
IsReversedLookupEnabled = args.FirstOrDefault(x => x.ToUpper() == "-ER") != null,
HopsCount = int.Parse(args[1])
});
}
catch { return(null); }
}
static void Main(string[] args)
{
ArgsInfo argsInfo = ArgsResolver.Resolve(new string[] { "google.by", "30", "-er" }); //ArgsResolver.Resolve(args);
if (argsInfo == null)
{
Usage();
return;
}
const int _maxTries = 3;
PacketDevice selectedCaptureDevice;
try
{
selectedCaptureDevice = PcapDevicesChooser.PromptPacketDevice();
if (selectedCaptureDevice == null)
{
throw new Exception();
}
}
catch { Console.WriteLine("Couldn't initialize packet device."); Console.ReadLine(); return; }
bool IsCompleted = false;
Console.WriteLine($"Tracing to {argsInfo.Destination.ToString()}");
Console.WriteLine();
bool IsAnyResponseReceived = false;
var lastCapturedSource = string.Empty;
using (var pingHelper = new Ping(selectedCaptureDevice, 500))
{
try
{
pingHelper.Initialize();
}
catch (SystemException e)
{
Console.WriteLine($"Program couldn't start. Reason: {e.Message}");
Console.ReadLine();
return;
}
int trie = 0;
int errorPackets = 0;
int maxErrorPackets = 10;
bool isSourceCaptured = false;
for (byte ttl = 1; ttl < argsInfo.HopsCount && !IsCompleted; ++ttl)
{
Console.Write($"{ttl}. ");
for (trie = 0; trie < _maxTries; ++trie)
{
var packet = pingHelper.Send(argsInfo.Destination, 10, ttl, true);
if (packet == null)
{
Console.Write($" * ");
continue;
}
var ipDatagram = packet.ReplyPacket.IpV4;
lastCapturedSource = ipDatagram.Source.ToString();
isSourceCaptured = true;
var icmpDatagram = packet.ReplyPacket.Ip.Icmp;
if (icmpDatagram.MessageType == IcmpMessageType.TimeExceeded || icmpDatagram.MessageType == IcmpMessageType.EchoReply)
{
var serverReplyTime = pingHelper.GetServerResponseTime(10, ipDatagram.Source.ToString());
if (serverReplyTime.Equals(-1))
{
Console.Write($" * ");
continue;
}
Console.Write($" {serverReplyTime} ms ");
IsAnyResponseReceived = true;
lastCapturedSource = ipDatagram.Source.ToString();
}
else
{
++errorPackets;
if (errorPackets > maxErrorPackets)
{
continue;
}
--trie;
}
}
if (IsAnyResponseReceived)
{
Console.Write($" {lastCapturedSource} ");
if (argsInfo.IsReversedLookupEnabled)
{
try
{
var hostName = NamesResolver.GetHostNameByIp(IPAddress.Parse(lastCapturedSource));
Console.Write(hostName);
}
catch { }
}
if (lastCapturedSource == argsInfo.Destination.ToString())
{
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("Trace completed.");
IsCompleted = true;
}
}
else if (isSourceCaptured)
{
Console.Write($"{lastCapturedSource} didn't reply to ping request.");
}
else
{
Console.Write("No response was received.");
}
isSourceCaptured = false;
IsAnyResponseReceived = false;
Console.WriteLine();
Console.WriteLine();
}
}
Console.ReadLine();
}
