//Трассировка пути ICMP пакета
static void Trace(Socket _socket, ICMPPacket _packet, IPEndPoint _ipPoint)
{
_socket.Connect(_ipPoint);
Console.WriteLine("Tracing " + _ipPoint.Address.ToString() + "...");
_socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, TIMEOUT);
for (byte i = 1; i < HOPS_NUM; i++)
{
Console.Write(i.ToString() + ". ");
for (byte j = 1; j <= PACKETS_NUM; j++)
{
int eCount = 0;
int eTime = 0;
IPEndPoint tempPoint = _ipPoint;
try
{
_socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.IpTimeToLive, i);
byte type = sendAndReceive(_socket, _packet, ref tempPoint, ref eTime);
Console.Write(" " + eTime.ToString() + "ms ");
if (j == PACKETS_NUM)
{
Console.WriteLine(tempPoint.ToString());
if (type == RESPONSE_TYPE)
{
Console.WriteLine();
Console.WriteLine("TRACING WAS FINISHED SUCCESSFULLY!");
Console.WriteLine();
return;
}
}
}
catch (SocketException)
{
Console.Write("*\t");
eCount++;
if (eCount == HOPS_NUM)
{
Console.WriteLine();
Console.WriteLine("HOST IS UNREACHEABLE!");
Console.WriteLine();
return;
}
}
}
}
_socket.Close();
}
const int TIMEOUT = 1000; //время ожидания в милисекундах
static void Main(string[] args)
{
while (true)
{
Console.WriteLine("Input the IP address or host address:");
string address = Console.ReadLine();
if ((isHost(address)) || (isIP(address)))
{
IPAddress temp = getIP(address);
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Icmp);
IPEndPoint ipPoint = new IPEndPoint(temp, 0);
byte[] data = Encoding.ASCII.GetBytes("Just a message");
ICMPPacket packet = new ICMPPacket(REQUEST_TYPE, 0, data);
Trace(socket, packet, ipPoint);
}
else
{
Console.WriteLine("ERROR!");
}
}
}
//Отправка пакета и получение ответа
static byte sendAndReceive(Socket _socket, ICMPPacket _packet, ref IPEndPoint _ipPoint, ref int eTime)
{
int sTime;
int fTime;
sTime = Environment.TickCount;
_socket.SendTo(_packet.Packet, _packet.PacketSize, SocketFlags.None, _ipPoint);
EndPoint tempPoint = _ipPoint;
byte[] rPacket = new byte[1024];
int rSize = _socket.ReceiveFrom(rPacket, ref tempPoint);
fTime = Environment.TickCount;
ICMPPacket response = new ICMPPacket(rPacket, rSize);
_ipPoint = (IPEndPoint)tempPoint;
if ((response.Type == RESPONSE_TYPE) || (response.Type == EXPAND_TTL_TYPE))
{
eTime = fTime - sTime;
}
return(response.Type);
}