private bool FindFirstMatchingRule(Packet packet, out uint ruleId)
{
SortedSet <uint> matchingRuleSet = new SortedSet <uint>();
ruleId = uint.MaxValue;
//Console.WriteLine("Processing " + packet.UserName + "in thread : " + Thread.CurrentThread.ManagedThreadId);
//Rules for matching name
matchingRuleSet.UnionWith(FindRulesMatchingUserName(packet));
if (matchingRuleSet.Count == 0)
{
return(false);
}
//Console.WriteLine("FindRulesMatchingUserName count " + userRuleSet.Count);
//Rules for same masked ip
HashSet <uint> maskedIPAllHostRuleSet = FindRulesMatchingIP(packet);
//Console.WriteLine("FindRulesMatchingIP count " + maskedIPRuleSet.Count);
//Add all Rules with hostname
maskedIPAllHostRuleSet.UnionWith(myHostnameRuleSet);
//Console.WriteLine("FindRulesMatchingIP count " + maskedIPRuleSet.Count);
matchingRuleSet.IntersectWith(maskedIPAllHostRuleSet);
//Console.WriteLine("IntersectWith FindRulesMatchingUserName FindRulesMatchingIP count " + userRuleSet.Count);
if (matchingRuleSet.Count == 0)
{
//No rule matched
return(false);
}
// ruleId = matchingRuleSet.Min();
bool matched = false;
foreach (uint id in matchingRuleSet)
{
if (!myHostnameRuleSet.Contains(id))
{
matched = true;
ruleId = id;
break;
}
IRule rule;
Debug.Assert(myRules.TryGetValue(id, out rule));
HostRule hostRule = rule as HostRule;
Debug.Assert(hostRule != null);
string packetHost = DNSlookupHelper.lookupCachedHost(packet.IPAddress);
if (string.Equals(packetHost, hostRule.HostName))
{
matched = true;
ruleId = id;
break;
}
}
return(matched);
}
private void BuildHostnameRuleSet(uint ruleId, IRule rule)
{
HostRule hostRule = rule as HostRule;
if (hostRule != null)
{
myHostnameRuleSet.Add(ruleId);
}
}
public static bool CreateHostnameRule(string line, out HostRule rule)
{
rule = null;
//System.Console.WriteLine(line);
string[] fields = line.Split('|');
if (fields.Length != RULE_FIELDS_COUNT)
{
return(false);
}
bool isAllowed = false;
if (!BaseRule.TryParseIsAllowed(fields[2], out isAllowed))
{
return(false);
}
string username = fields[0];
string hostname = fields[1];
rule = new HostRule(username, hostname, isAllowed);
return(true);
}