private static void AddRestrictionToIPList(IPList list, string restriction)
{
if (!string.IsNullOrEmpty(restriction))
{
if (StringUtils.Contains(restriction, "-"))
{
restriction = restriction.Trim(' ', '-');
var arr = restriction.Split('-');
list.AddRange(arr[0].Trim(), arr[1].Trim());
}
else if (StringUtils.Contains(restriction, "*"))
{
var ipPrefix = restriction.Substring(0, restriction.IndexOf('*'));
ipPrefix = ipPrefix.Trim(' ', '.');
var dotNum = StringUtils.GetCount(".", ipPrefix);
var ipNumber = ipPrefix;
var mask = "255.255.255.255";
if (dotNum == 0)
{
ipNumber = ipPrefix + ".0.0.0";
mask = "255.0.0.0";
}
else if (dotNum == 1)
{
ipNumber = ipPrefix + ".0.0";
mask = "255.255.0.0";
}
else
{
ipNumber = ipPrefix + ".0";
mask = "255.255.255.0";
}
list.Add(ipNumber, mask);
}
else
{
list.Add(restriction);
}
}
}
private static bool IsVisitAllowed(ERestrictionType restrictionType, StringCollection restrictionList)
{
var isAllowed = true;
if (restrictionType != ERestrictionType.NoRestriction)
{
var userIP = PageUtils.GetIpAddress();
if (restrictionType == ERestrictionType.BlackList)
{
var list = new IPList();
foreach (var restriction in restrictionList)
{
AddRestrictionToIPList(list, restriction);
}
if (list.CheckNumber(userIP))
{
isAllowed = false;
}
}
else if (restrictionType == ERestrictionType.WhiteList)
{
if (restrictionList.Count > 0)
{
isAllowed = false;
var list = new IPList();
foreach (var restriction in restrictionList)
{
AddRestrictionToIPList(list, restriction);
}
if (list.CheckNumber(userIP))
{
isAllowed = true;
}
}
}
}
return(isAllowed);
}