public IPRule(string username, UInt16[] ipAddress, UInt16 mask, bool isAllowed) : base(username, isAllowed)
{
if (ipAddress.Length != 4)
{
throw new ArgumentException("ipAddress should have four octets");
}
myIPAddress = ipAddress;
myMask = mask;
myMaskedIPAddress = IPUtils.ApplyMask(myMask, myIPAddress);
}
private HashSet <uint> FindRulesMatchingIP(Packet packet)
{
HashSet <uint> maskedIPRuleSet = new HashSet <uint>();
foreach (UInt16 mask in myMaskedIPToRuleMap.Keys)
{
uint maskedPacketIP = IPUtils.ApplyMask(mask, packet.IPAddress);
Dictionary <uint, HashSet <uint> > ipRuleMap = null;
if (myMaskedIPToRuleMap.TryGetValue(mask, out ipRuleMap))
{
HashSet <uint> ruleSet = null;
ipRuleMap.TryGetValue(maskedPacketIP, out ruleSet);
if (ruleSet != null && ruleSet.Count != 0)
{
maskedIPRuleSet.UnionWith(ruleSet);
}
}
}
return(maskedIPRuleSet);
}