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DnsServer: changes done to include authority and additional records when last response is authoritative.

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This commit is contained in:
Shreyas Zare
2017-12-03 23:10:05 +05:30
parent 719771c8c7
commit f2bd4eedcf
1 changed files with 23 additions and 4 deletions
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27
DnsServerCore/DnsServer.cs
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@@ -371,23 +371,35 @@ namespace DnsServerCore
DnsResponseCode rcode;
DnsResourceRecord[] authority;
DnsResourceRecord[] additional;
if (lastResponse.Header.RCODE == DnsResponseCode.Refused)
{
rcode = DnsResponseCode.NoError;
authority = new DnsResourceRecord[] { };
additional = new DnsResourceRecord[] { };
}
else
{
rcode = lastResponse.Header.RCODE;
if ((lastResponse.Authority.Length > 0) && (lastResponse.Authority[0].Type == DnsResourceRecordType.SOA))
if (lastResponse.Header.AuthoritativeAnswer)
{
authority = lastResponse.Authority;
additional = lastResponse.Additional;
}
else
authority = new DnsResourceRecord[] { };
{
if ((lastResponse.Authority.Length > 0) && (lastResponse.Authority[0].Type == DnsResourceRecordType.SOA))
authority = lastResponse.Authority;
else
authority = new DnsResourceRecord[] { };
additional = new DnsResourceRecord[] { };
}
}
return new DnsDatagram(new DnsHeader(request.Header.Identifier, true, DnsOpcode.StandardQuery, lastResponse.Header.AuthoritativeAnswer, false, request.Header.RecursionDesired, _allowRecursion, false, false, rcode, 1, Convert.ToUInt16(responseAnswer.Count), Convert.ToUInt16(authority.Length), 0), request.Question, responseAnswer.ToArray(), authority, new DnsResourceRecord[] { });
return new DnsDatagram(new DnsHeader(request.Header.Identifier, true, DnsOpcode.StandardQuery, lastResponse.Header.AuthoritativeAnswer, false, request.Header.RecursionDesired, _allowRecursion, false, false, rcode, 1, Convert.ToUInt16(responseAnswer.Count), Convert.ToUInt16(authority.Length), (ushort)additional.Length), request.Question, responseAnswer.ToArray(), authority, additional);
}
}
@@ -414,7 +426,14 @@ namespace DnsServerCore
while (true)
{
lastResponse = DnsClient.ResolveViaNameServers((lastRR.RDATA as DnsCNAMERecord).CNAMEDomainName, questionType, _forwarders, _dnsCache, null, _preferIPv6, false, _retries);
DnsQuestionRecord question;
if (questionType == DnsResourceRecordType.PTR)
question = new DnsQuestionRecord(IPAddress.Parse((lastRR.RDATA as DnsCNAMERecord).CNAMEDomainName), DnsClass.IN);
else
question = new DnsQuestionRecord((lastRR.RDATA as DnsCNAMERecord).CNAMEDomainName, questionType, DnsClass.IN);
lastResponse = DnsClient.ResolveViaNameServers(question, _forwarders, _dnsCache, null, _preferIPv6, false, _retries);
if ((lastResponse.Header.RCODE != DnsResponseCode.NoError) || (lastResponse.Answer.Length == 0))
break;