public IPResponse FindByIp(string searchAddress)
{
IPAddress ipAddress;
if (!IPAddress.TryParse(searchAddress, out ipAddress))
{
return(null);
}
var ipBytes = ipAddress.GetAddressBytes();
uint ip = (uint)ipBytes[3];
ip += (uint)ipBytes[2] << 8;
ip += (uint)ipBytes[1] << 16;
ip += (uint)ipBytes[0] << 24;
int startIndex = 0;
int finishIndex = GeobaseStorage.IpData.Length;
while (true)
{
int averageIndex = startIndex + (finishIndex - startIndex) / 2;
if (averageIndex == startIndex || averageIndex == finishIndex)
{
return(new IPResponse());
}
if (ip >= GeobaseStorage.IpData[averageIndex].ip_from && ip <= GeobaseStorage.IpData[averageIndex].ip_to)
{
var location = GeobaseStorage.LocationData[GeobaseStorage.IpData[averageIndex].location_index];
return(ResponseCreator.CreateIPResponse(GeobaseStorage.IpData[averageIndex], location));
}
if (ip < GeobaseStorage.IpData[averageIndex].ip_to)
{
finishIndex = averageIndex;
}
else
{
startIndex = averageIndex;
}
}
}