private bool ValidateIP(string ipString, IPAddressFamily ipFamily)
{
IPAddress address;
if (IPAddress.TryParse(ipString, out address))
{
if (ipFamily == IPAddressFamily.IPv4 &&
address.AddressFamily == AddressFamily.InterNetwork &&
ipString.Split('.').Length == 4)
{
return(true);
}
if (ipFamily == IPAddressFamily.IPv6 &&
address.AddressFamily == AddressFamily.InterNetworkV6)
{
return(true);
}
}
return(false);
}
public string GetUserRequestIPAddress(HttpRequestBase request, IPAddressFamily ipFamily)
{
var userRequestIPHeader = HostController.Instance.GetString("UserRequestIPHeader", "X-Forwarded-For");
var userIPAddress = string.Empty;
if (request.Headers.AllKeys.Contains(userRequestIPHeader))
{
userIPAddress = request.Headers[userRequestIPHeader];
userIPAddress = userIPAddress.Split(',')[0];
}
if (string.IsNullOrEmpty(userIPAddress))
{
var remoteAddrVariable = "REMOTE_ADDR";
if (request.ServerVariables.AllKeys.Contains(remoteAddrVariable))
{
userIPAddress = request.ServerVariables[remoteAddrVariable];
}
}
if (string.IsNullOrEmpty(userIPAddress))
{
userIPAddress = request.UserHostAddress;
}
if (string.IsNullOrEmpty(userIPAddress) || userIPAddress.Trim() == "::1")
{
userIPAddress = string.Empty;
}
if (!string.IsNullOrEmpty(userIPAddress) && !ValidateIP(userIPAddress, ipFamily))
{
userIPAddress = string.Empty;
}
return(userIPAddress);
}