private double FindHostnameSimilarity(Query query, DnsRule rule)
{
var hostnames = rule.Hostnames;
if (query.QueryType != DnsRecordType.CNAME && query.QueryType != DnsRecordType.A)
{
if (hostnames.Any(hostname => hostname.HostnameType == HostnameType.Exact && hostname.HostnameEntry == query.Question))
{
return 1;
}
return 0;
}
if (hostnames.Any(hostname => hostname.HostnameType == HostnameType.Exact && hostname.HostnameEntry == query.Question))
{
return 1;
}
if (hostnames.Any(hostname => hostname.HostnameType == HostnameType.Wildcard && query.Question.EndsWith(hostname.HostnameEntry)))
{
return 0.9;
}
return 0;
}
public void AddRule(DnsRule dnsRule)
{
_dnsRules.Add(dnsRule);
}
private double SimilarRuleTypes(Query query, DnsRule rule)
{
if (rule.RuleType.HasValue && (rule.RuleType.Value == DnsRuleType.NXDomain || rule.RuleType.Value == DnsRuleType.ResolveUpstream))
{
return 0.1;
}
if (rule.RecordType == query.QueryType)
{
return 1;
}
if (query.QueryType == DnsRecordType.A && rule.RecordType == DnsRecordType.CNAME)
{
return 0.9;
}
return 0;
}