/// <summary>
/// Creates a new flow instance.
/// </summary>
/// <param name="settings">The settings.</param>
public MultipathTracerouteFlow(MultipathTracerouteSettings settings)
{
// Set the identifier.
this.Id = Guid.NewGuid();
// Set the short identifier.
this.id = this.Id.ToByteArray();
this.ShortId = 0;
for (int index = 0; index < this.id.Length - 1; index += 2)
{
this.ShortId ^= (ushort)((this.id[index] << 8) | this.id[index + 1]);
}
// Set the TTL count.
this.TtlCount = settings.MaximumHops - settings.MinimumHops + 1;
// Create the ICMP data.
this.IcmpData = new MultipathTracerouteData[this.TtlCount, settings.AttemptsPerFlow];
// Create the UDP data.
this.UdpData = new MultipathTracerouteData[this.TtlCount, settings.AttemptsPerFlow];
// Compute the UDP source port.
this.UdpSourcePort = (ushort)((settings.MinimumPort + (settings.MaximumPort - settings.MinimumPort) * (ushort)((this.id[4] << 8) | this.id[5]) / 0x10000) & 0xFFFF);
// Compute the UDP destination port.
this.UdpDestinationPort = (ushort)((settings.MinimumPort + (settings.MaximumPort - settings.MinimumPort) * (ushort)((this.id[6] << 8) | this.id[7]) / 0x10000) & 0xFFFF);
}
/// <summary>
/// Creates a new multipath traceroute with the specified settings.
/// </summary>
/// <param name="settings">The settings.</param>
public MultipathTraceroute(MultipathTracerouteSettings settings, PacketCapture capture)
{
// Validate the settings.
if ((settings.AttemptsPerFlow == 0) || (settings.AttemptsPerFlow > 255))
throw new ArgumentException("The maximum attempts per flow is invalid (1..255).");
if ((settings.FlowCount == 0) || (settings.FlowCount > 255))
throw new ArgumentException("The maximum flow count is invalid (1..255).");
if (settings.MinimumHops == 0)
throw new ArgumentException("The minimum hops count is invalid (1..255).");
if (settings.MaximumHops == 0)
throw new ArgumentException("The maximum hops count is invalid (1..255).");
if (settings.MinimumHops >= settings.MaximumHops)
throw new ArgumentException("The minimum hops must be smaller than the maximum hops.");
if (settings.MaximumUnknownHops == 0)
throw new ArgumentException("The maximum unknown hops count is invalid (1..255).");
if ((settings.DataLength == 0) || (settings.DataLength > 1024))
throw new ArgumentException("The data length is invalid (1..1024).");
if ((settings.MinimumPort < 1024) || (settings.MinimumPort > 65520))
throw new ArgumentException("The minimum port is invalid (1024..65520).");
if ((settings.MaximumPort < 1024) || (settings.MaximumPort > 65520))
throw new ArgumentException("The maximum port is invalid (1024..65520).");
if (settings.MinimumPort >= settings.MaximumPort)
throw new ArgumentException("The minimum port must be smaller than the maximum port.");
if (settings.DataLength < 2)
throw new ArgumentException("The minimum data length is 2.");
// Set the packet capture.
this.capture = capture;
// Set the settings.
this.settings = settings;
// Global parameters.
ProtoPacketIcmp.IgnoreChecksum = true;
// Initialize the receiving buffers.
//for (int index = 0; index < MultipathTraceroute.bufferCount; index++)
//{
// this.bufferRecv[index] = new byte[MultipathTraceroute.bufferSize];
// this.bufferQueue.Enqueue(index);
//}
// Create the timer.
this.timer = new Timer((object state) =>
{
lock (this.syncResults)
{
// For all results.
foreach (MultipathTracerouteResult result in this.results)
{
// Call the result timeout method.
result.Timeout();
}
}
}, null, TimeSpan.Zero, TimeSpan.FromMilliseconds(MultipathTraceroute.requestsTimeout));
}