/// <summary>
/// Gets the current latitude and longitude based on cell tower data.
/// </summary>
/// <param name="cellTowerId">The cell tower id.</param>
/// <param name="mobileCountryCode">The mobile country code.</param>
/// <param name="mobileNetworkCode">The mobile network code.</param>
/// <param name="locationAreaCode">The location area code.</param>
/// <returns></returns>
public static GeoLocation GetLocation(RILCELLTOWERINFO t)
{
try
{
// Translate cell tower data into http post parameter data
byte[] formData = GetFormPostData((int)t.dwCellID,
(int)t.dwMobileCountryCode,
(int)t.dwMobileNetworkCode,
(int)t.dwLocationAreaCode);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri(Google_Mobile_Service_Uri));
request.Method = "POST";
request.ContentLength = formData.Length;
request.ContentType = "application/binary";
Stream outputStream = request.GetRequestStream();
// Write the cell data to the http stream
outputStream.Write(formData, 0, formData.Length);
outputStream.Close();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
return ReadResponse(response);
}
catch
{ }
return GeoLocation.Empty;
}
/*
* Uses RIL to get CellID from the phone.
*/
public static RILCELLTOWERINFO GetCellTowerInfo()
{
// initialise handles
IntPtr hRil = IntPtr.Zero;
IntPtr hRes = IntPtr.Zero;
// initialise result
CellTowerInfo = null;
// initialise RIL
hRes = RIL_Initialize(1, // RIL port 1
new RILRESULTCALLBACK(rilResultCallback), // function to call with result
null, // function to call with notify
0, // classes of notification to enable
0, // RIL parameters
out hRil); // RIL handle returned
if (hRes != IntPtr.Zero)
{
throw new Exception("Failed to initialize RIL");
}
// initialised successfully
// use RIL to get cell tower info with the RIL handle just created
hRes = RIL_GetCellTowerInfo(hRil);
// wait for cell tower info to be returned
waithandle.WaitOne();
// finished - release the RIL handle
RIL_Deinitialize(hRil);
// return the result from GetCellTowerInfo
// return celltowerinfo;
return CellTowerInfo;
}
public static Coordinates GetLocation(RILCELLTOWERINFO t)
{
Coordinates coord = new Coordinates();
try
{
string apiCall = OpenCellID_Service_Uri +
"&mnc=" + t.dwMobileNetworkCode +
"&mcc=" + t.dwMobileCountryCode +
"&lac=" + t.dwLocationAreaCode +
"&cellid=" + t.dwCellID;
XmlDocument doc = new XmlDocument();
doc.Load(apiCall);
//EXAMPLE:
// <cell mnc="99" lac="0" lat="50.5715642160311" nbSamples="57" range="6000" lon="25.2897075399231" cellId="29513" mcc="250"/>
XmlNode rspNode = doc.SelectSingleNode("rsp");
string status = rspNode.Attributes["stat"].Value;
status.ToLower();
if (status == "ok")
{
XmlNode cellNode = rspNode.SelectSingleNode("cell");
int samples = int.Parse(cellNode.Attributes["nbSamples"].Value);
if (samples>0)
{
coord.Latitude = double.Parse(cellNode.Attributes["lat"].Value);
coord.Longitude = double.Parse(cellNode.Attributes["lon"].Value);
coord.Precision = double.Parse(cellNode.Attributes["range"].Value);
}
}
}
catch
{ }
return coord;
}
public static void rilResultCallback(uint dwCode,
IntPtr hrCmdID,
IntPtr lpData,
uint cbData,
uint dwParam)
{
// create empty structure to store cell tower info in
RILCELLTOWERINFO rilCellTowerInfo = new RILCELLTOWERINFO();
// copy result returned from RIL into structure
Marshal.PtrToStructure(lpData, rilCellTowerInfo);
// get the bits out of the RIL cell tower response that we want
CellTowerInfo = rilCellTowerInfo;
// notify caller function that we have a result
waithandle.Set();
}
