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CacheZoneManager: updated code to require DnsServer reference to read serve stale option.

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This commit is contained in:
Shreyas Zare
2021-04-03 12:31:51 +05:30
parent 68a0864938
commit f8230ce7a1
1 changed files with 13 additions and 6 deletions
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19
DnsServerCore/Dns/ZoneManagers/CacheZoneManager.cs
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@@ -34,15 +34,19 @@ namespace DnsServerCore.Dns.ZoneManagers
const uint MINIMUM_RECORD_TTL = 10u;
const uint SERVE_STALE_TTL = 3 * 24 * 60 * 60; //3 days serve stale ttl as per https://www.rfc-editor.org/rfc/rfc8767.html suggestion
readonly DnsServer _dnsServer;
readonly ZoneTree<CacheZone> _root = new ZoneTree<CacheZone>();
#endregion
#region constructor
public CacheZoneManager()
public CacheZoneManager(DnsServer dnsServer)
: base(FAILURE_RECORD_TTL, NEGATIVE_RECORD_TTL, MINIMUM_RECORD_TTL, SERVE_STALE_TTL)
{ }
{
_dnsServer = dnsServer;
}
#endregion
@@ -68,11 +72,12 @@ namespace DnsServerCore.Dns.ZoneManagers
return new CacheZone(resourceRecords[0].Name);
});
zone.SetRecords(resourceRecords[0].Type, resourceRecords);
zone.SetRecords(resourceRecords[0].Type, resourceRecords, _dnsServer.ServeStale);
}
else
{
Dictionary<string, Dictionary<DnsResourceRecordType, List<DnsResourceRecord>>> groupedByDomainRecords = DnsResourceRecord.GroupRecords(resourceRecords);
bool serveStale = _dnsServer.ServeStale;
//add grouped records
foreach (KeyValuePair<string, Dictionary<DnsResourceRecordType, List<DnsResourceRecord>>> groupedByTypeRecords in groupedByDomainRecords)
@@ -86,7 +91,7 @@ namespace DnsServerCore.Dns.ZoneManagers
});
foreach (KeyValuePair<DnsResourceRecordType, List<DnsResourceRecord>> groupedRecords in groupedByTypeRecords.Value)
zone.SetRecords(groupedRecords.Key, groupedRecords.Value);
zone.SetRecords(groupedRecords.Key, groupedRecords.Value, serveStale);
}
}
}
@@ -170,11 +175,13 @@ namespace DnsServerCore.Dns.ZoneManagers
#region public
public void DoMaintenance()
public override void RemoveExpiredRecords()
{
bool serveStale = _dnsServer.ServeStale;
foreach (CacheZone zone in _root)
{
zone.RemoveExpiredRecords();
zone.RemoveExpiredRecords(serveStale);
if (zone.IsEmpty)
_root.TryRemove(zone.Name, out _); //remove empty zone