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ResolverDnsCache: implemented skipConditionalForwardingResolution option to prevent stack overflow cases.

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This commit is contained in:
Shreyas Zare
2025-02-02 16:01:51 +05:30
parent 2dd6b95d57
commit 3b96811325
1 changed files with 5 additions and 2 deletions
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7
DnsServerCore/Dns/ResolverDnsCache.cs
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@@ -35,15 +35,17 @@ namespace DnsServerCore.Dns
readonly DnsServer _dnsServer; readonly DnsServer _dnsServer;
readonly bool _skipDnsAppAuthoritativeRequestHandlers; readonly bool _skipDnsAppAuthoritativeRequestHandlers;
readonly bool _skipConditionalForwardingResolution;
#endregion #endregion
#region constructor #region constructor
public ResolverDnsCache(DnsServer dnsServer, bool skipDnsAppAuthoritativeRequestHandlers) public ResolverDnsCache(DnsServer dnsServer, bool skipDnsAppAuthoritativeRequestHandlers, bool skipConditionalForwardingResolution = false)
{ {
_dnsServer = dnsServer; _dnsServer = dnsServer;
_skipDnsAppAuthoritativeRequestHandlers = skipDnsAppAuthoritativeRequestHandlers; _skipDnsAppAuthoritativeRequestHandlers = skipDnsAppAuthoritativeRequestHandlers;
_skipConditionalForwardingResolution = skipConditionalForwardingResolution;
} }
#endregion #endregion
@@ -121,7 +123,7 @@ namespace DnsServerCore.Dns
advancedForwardingClientSubnet = requestECS.AdvancedForwardingClientSubnet; advancedForwardingClientSubnet = requestECS.AdvancedForwardingClientSubnet;
} }
ResolverPrefetchDnsCache dnsCache = new ResolverPrefetchDnsCache(_dnsServer, _skipDnsAppAuthoritativeRequestHandlers, question); ResolverDnsCache dnsCache = new ResolverDnsCache(_dnsServer, _skipDnsAppAuthoritativeRequestHandlers, true);
return _dnsServer.PriorityConditionalForwarderResolveAsync(question, eDnsClientSubnet, advancedForwardingClientSubnet, dnsCache, _skipDnsAppAuthoritativeRequestHandlers, conditionalForwarders); return _dnsServer.PriorityConditionalForwarderResolveAsync(question, eDnsClientSubnet, advancedForwardingClientSubnet, dnsCache, _skipDnsAppAuthoritativeRequestHandlers, conditionalForwarders);
} }
@@ -207,6 +209,7 @@ namespace DnsServerCore.Dns
return cacheResponse; return cacheResponse;
} }
if (!_skipConditionalForwardingResolution)
{ {
DnsResourceRecord authResponseFirstAuthority = authResponse.FindFirstAuthorityRecord(); DnsResourceRecord authResponseFirstAuthority = authResponse.FindFirstAuthorityRecord();
if (authResponseFirstAuthority.Type == DnsResourceRecordType.FWD) if (authResponseFirstAuthority.Type == DnsResourceRecordType.FWD)