/// <summary>
/// method is used to calculate the position of the wifi adapter (client). Be aware of the possibly long break!
/// </summary>
/// <param name="client">WlanClient</param>
/// <returns>Position</returns>
public virtual Position findPosition(WlanClient client)
{
LinkedList <BlindMeasurement> measured = new LinkedList <BlindMeasurement>();
Dictionary <string, RssiCalcHelper> calcList = new Dictionary <string, RssiCalcHelper>();
Wlan.WlanBssEntry[] bsses = client.Interfaces[0].GetNetworkBssList();
int rssi = 0;
for (int i = 0; i < this.findPositionCount; i++)
{
foreach (Wlan.WlanBssEntry bss in bsses)
{
rssi = bss.rssi; // signal strength
string bssid = Converter.getBssid(bss);
if (rssi > this.minimumRangeRssi || this.minimumRangeRssi == 0)
{
if (i != 0)
{
if (!calcList.ContainsKey(bssid))
{
calcList.Add(bssid, new RssiCalcHelper(rssi));
}
else if (calcList.ContainsKey(bssid))
{
RssiCalcHelper tempHelper = calcList[bssid];
calcList.Remove(bssid);
tempHelper.addRssi(rssi);
calcList.Add(bssid, tempHelper);
}
Console.WriteLine("Measurement - AP: bssid=" + bssid + " rssi=" + rssi);
}
else
{
Console.WriteLine("1st measurement dropped!");
}
}
}
Console.WriteLine("");
Thread.Sleep(this.scanPause);
bsses = client.Interfaces[0].GetNetworkBssList();
client.Interfaces[0].Scan();
}
foreach (KeyValuePair <string, RssiCalcHelper> keyValPair in calcList)
{
string bssid = keyValPair.Key;
RssiCalcHelper tempRssiHelper = keyValPair.Value;
double averageRssi = tempRssiHelper.getAverageRssi();
double averageFluctuation = tempRssiHelper.getAverageFluctuation();
measured.AddLast(new BlindMeasurement(bssid, averageRssi, averageFluctuation));
Console.WriteLine("Saved Middle value for: " + bssid + " rssi= " + averageRssi + " fluctuation= " + averageFluctuation);
}
List <SectorDifference> results = new List <SectorDifference>();
int counterMap = 0;
foreach (KeyValuePair <int, Sector> keyValPair in this.accessPointsMap)
{
int sector = keyValPair.Key;
Sector tempSector = keyValPair.Value;
Console.WriteLine("Sector: " + sector);
int counter = 0;
Dictionary <string, AccessPoint> tempApMap = tempSector.getAccessPoints();
double result = 0;
foreach (BlindMeasurement apData in measured)
{
char[] delimiter = new char[] { '|' };
string[] splitted = apData.getBssid().Split(delimiter, StringSplitOptions.RemoveEmptyEntries);
apData.setBssid(splitted[0]);
if (tempApMap.ContainsKey(apData.getBssid()))
{
AccessPoint apTemp = tempApMap[apData.getBssid()];
double tempResult = Math.Abs(apTemp.getRssi() - apData.getRssi());
if (
(this.standardError == false && tempResult <= apData.getAverageFluctuation()) ||
(this.standardError == true && tempResult <= this.errorBuffer)
)
{
tempResult = 0;
}
result += tempResult;
Console.WriteLine("Result: bssid=" + apData.getBssid() + " map " + apTemp.getRssi() + " measured " + apData.getRssi() + " DIF: " + tempResult);
counter++;
}
}
counterMap++;
double average = 0;
if (counter == 0)
{
Console.WriteLine("");
}
else
{
average = result / counter;
Console.WriteLine("calculated range " + result + "/" + counter + " = " + average);
results.Add(new SectorDifference(tempSector.getX(), tempSector.getY(), average));
}
}
Console.WriteLine("Results: ");
results.Sort(delegate(SectorDifference s1, SectorDifference s2)
{
return(s1.getRssi().CompareTo(s2.getRssi()));
});
Position tempPos = printFinalResult(results);
Thread.Sleep(this.scanPause);
return(tempPos);
}
/// <summary>
/// saves the current map into a file
/// </summary>
/// <param name="mapName">string</param>
public virtual void saveMap(string mapName)
{
XmlTextWriter xml = new XmlTextWriter(mapName, null);
try
{
//string json = JsonConvert.SerializeObject(this.accessPointsMap);
//fileWriter.Write(json);
xml.WriteStartDocument();
xml.WriteStartElement("map");
xml.WriteWhitespace("");
int sectorCounter = 0;
// cycle through map
foreach (KeyValuePair <int, Sector> keyValPair in this.accessPointsMap)
{
sectorCounter++;
int maxSectors = this.accessPointsMap.Count;
int sectorNumber = keyValPair.Key;
Sector sector = keyValPair.Value;
xml.WriteStartElement("sector");
xml.WriteStartElement("number");
xml.WriteString(sectorNumber.ToString());
xml.WriteEndElement();
xml.WriteStartElement("x");
xml.WriteString(sector.getX().ToString());
xml.WriteEndElement();
xml.WriteStartElement("y");
xml.WriteString(sector.getY().ToString());
xml.WriteEndElement();
Dictionary <string, AccessPoint> accessPointDictionary = sector.getAccessPoints();
int apCount = 0;
foreach (KeyValuePair <string, AccessPoint> entryPair in accessPointDictionary)
{
string bssid = entryPair.Key;
AccessPoint accessPoint = entryPair.Value;
xml.WriteStartElement("accesspoint");
xml.WriteStartElement("bssid");
xml.WriteString(accessPoint.getBssid());
xml.WriteEndElement();
xml.WriteStartElement("rssi");
xml.WriteString(accessPoint.getRssi().ToString());
xml.WriteEndElement();
xml.WriteEndElement();
apCount++;
}
xml.WriteStartElement("stop");
xml.WriteString("stop");
xml.WriteEndElement();
xml.WriteEndElement();
}
xml.WriteEndElement();
xml.WriteEndDocument();
}
catch (Exception e)
{
Console.WriteLine(e.StackTrace);
}
finally
{
xml.Close();
}
}