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CacheZoneManager: setting max record TTL to 7 days. Implemented new Query() definition changes.

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This commit is contained in:
Shreyas Zare
2021-07-18 15:46:00 +05:30
parent 320109101e
commit fe8bc9e273
1 changed files with 4 additions and 10 deletions
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14
DnsServerCore/Dns/ZoneManagers/CacheZoneManager.cs
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@@ -32,7 +32,7 @@ namespace DnsServerCore.Dns.ZoneManagers
const uint FAILURE_RECORD_TTL = 60u;
const uint NEGATIVE_RECORD_TTL = 300u;
const uint MINIMUM_RECORD_TTL = 10u;
const uint MAXIMUM_RECORD_TTL = 1 * 24 * 60 * 60;
const uint MAXIMUM_RECORD_TTL = 7 * 24 * 60 * 60;
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;
@@ -285,7 +285,7 @@ namespace DnsServerCore.Dns.ZoneManagers
return null;
}
public override DnsDatagram Query(DnsDatagram request, bool serveStaleAndResetExpiry = false)
public override DnsDatagram Query(DnsDatagram request, bool serveStaleAndResetExpiry = false, bool findClosestNameServers = false)
{
DnsQuestionRecord question = request.Question[0];
@@ -311,10 +311,7 @@ namespace DnsServerCore.Dns.ZoneManagers
}
}
if (serveStaleAndResetExpiry)
return null; //recursive resolver does not make stale request so no need to return delegation response
if (delegation is not null)
if (findClosestNameServers && delegation is not null)
{
//return closest name servers in delegation
IReadOnlyList<DnsResourceRecord> closestAuthority = delegation.QueryRecords(DnsResourceRecordType.NS, serveStaleAndResetExpiry, true);
@@ -401,11 +398,8 @@ namespace DnsServerCore.Dns.ZoneManagers
else
{
//no answer in cache
if (serveStaleAndResetExpiry)
return null; //recursive resolver does not make stale request so no need to return delegation response
//check for closest delegation if any
if (delegation is not null)
if (findClosestNameServers && delegation is not null)
{
//return closest name servers in delegation
IReadOnlyList<DnsResourceRecord> closestAuthority = delegation.QueryRecords(DnsResourceRecordType.NS, false, true);