public IPEntity Query(string ip)
{
IPAddress address = IPAddress.Parse(ip);
if (address.AddressFamily != AddressFamily.InterNetwork)
{
throw new ArgumentException("不支持非IPV4的地址");
}
if (IPAddress.IsLoopback(address))
{
return new IPEntity() { IP = ip, Country = "本机内部环回地址", Local = string.Empty };
}
long intIP = IpToInt(ip);
IPEntity ipLocation = new IPEntity() { IP = ip };
uint right = (uint)ipCount;
uint left = 0;
uint middle = 0;
uint startIp = 0;
uint endIpOff = 0;
uint endIp = 0;
int countryFlag = 0;
while (left < (right - 1))
{
middle = (right + left) / 2;
startIp = GetStartIp(middle, out endIpOff);
if (intIP == startIp)
{
left = middle;
break;
}
if (intIP > startIp)
{
left = middle;
}
else
{
right = middle;
}
}
startIp = GetStartIp(left, out endIpOff);
endIp = GetEndIp(endIpOff, out countryFlag);
if ((startIp <= intIP) && (endIp >= intIP))
{
string local;
ipLocation.Country = GetCountry(endIpOff, countryFlag, out local);
ipLocation.Local = local;
}
else
{
ipLocation.Country = "未知";
ipLocation.Local = string.Empty;
}
return ipLocation;
}
public IPEntity Query(string ip)
{
IPAddress address = IPAddress.Parse(ip);
if (address.AddressFamily != AddressFamily.InterNetwork)
{
throw new ArgumentException("不支持非IPV4的地址");
}
if (IPAddress.IsLoopback(address))
{
return(new IPEntity()
{
IP = ip, Country = "本机内部环回地址", Local = string.Empty
});
}
long intIP = IpToInt(ip);
IPEntity ipLocation = new IPEntity()
{
IP = ip
};
uint right = (uint)ipCount;
uint left = 0;
uint middle = 0;
uint startIp = 0;
uint endIpOff = 0;
uint endIp = 0;
int countryFlag = 0;
while (left < (right - 1))
{
middle = (right + left) / 2;
startIp = GetStartIp(middle, out endIpOff);
if (intIP == startIp)
{
left = middle;
break;
}
if (intIP > startIp)
{
left = middle;
}
else
{
right = middle;
}
}
startIp = GetStartIp(left, out endIpOff);
endIp = GetEndIp(endIpOff, out countryFlag);
if ((startIp <= intIP) && (endIp >= intIP))
{
string local;
ipLocation.Country = GetCountry(endIpOff, countryFlag, out local);
ipLocation.Local = local;
}
else
{
ipLocation.Country = "未知";
ipLocation.Local = string.Empty;
}
return(ipLocation);
}