private static IEnumerable <LatencyNeighborPair> FindNeighborsInHopPair(ScamperHop currentHop, int currentHopIndex, ScamperHop neighborHop, int neighborHopIndex, decimal maximumLatencyDiff, decimal maxRTT)
{
if (currentHop != null && neighborHop != null && currentHop.IPs != null && neighborHop.IPs != null)
{
for (var i = 0; i < currentHop.IPs.Count; i++)
{
var currentIPInfo = currentHop.IPs[i];
if (currentIPInfo != null && currentIPInfo.IP != null)
{
for (var j = 0; j < neighborHop.IPs.Count; j++)
{
var neighborIPInfo = neighborHop.IPs[j];
if (neighborIPInfo != null && neighborIPInfo.IP != null && currentIPInfo.IP != neighborIPInfo.IP && currentIPInfo.RTT <= maxRTT && neighborIPInfo.RTT <= maxRTT)
{
var latencyDiff = Math.Abs(currentIPInfo.RTT - neighborIPInfo.RTT);
if (latencyDiff <= maximumLatencyDiff)
{
yield return(new LatencyNeighborPair()
{
Neighbor1 = currentIPInfo.IP,
Neighbor2 = neighborIPInfo.IP,
Neighbor1HopIndex = currentHopIndex,
Neighbor2HopIndex = neighborHopIndex,
Neighbor1RTT = currentIPInfo.RTT,
Neighbor2RTT = neighborIPInfo.RTT,
DiffDistanceInHops = neighborHopIndex - currentHopIndex,
LatencyDiff = latencyDiff
});
}
}
}
}
}
}
}
/*
# 14. PerHopData -- Response data for the first hop.
#
# If multiple IP addresses respond at the same hop, response data
# for each IP address are separated by semicolons:
#
# IP,RTT,nTries (for only one responding IP)
# IP,RTT,nTries;IP,RTT,nTries;... (for multiple responding IPs)
#
# where
#
# IP -- IP address which sent a TTL expired packet
# RTT -- RTT of the TTL expired packet
# nTries -- number of tries before response received from hop
#
# This field will have the value 'q' if there was no response at
# this hop.
*/
public static ScamperHop ParseHop(string line, string value)
{
// This field will have the value 'q' if there was no response at this hop.
if (value == "q")
{
return(null);
}
var rawIPsInfo = value.Split(new char[] { ';' });
var ipInfosInHop = new List <ScamperHopIPInfo>();
foreach (var rawIPInfo in rawIPsInfo)
{
var infoParts = rawIPInfo.Split(new char[] { ',' });
if (infoParts.Length != 3)
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "Number of infoParts in ParseHop was not 3 for rawIPInfo: {0} and line: {1}", rawIPInfo, line));
}
var hopIPInfo = new ScamperHopIPInfo()
{
IP = IPAddress.Parse(infoParts[0]),
RTT = decimal.Parse(infoParts[1]),
Tries = int.Parse(infoParts[2])
};
ipInfosInHop.Add(hopIPInfo);
}
var hop = new ScamperHop()
{
IPs = ipInfosInHop
};
return(hop);
}