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added qname and app record name check.

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This commit is contained in:
Shreyas Zare
2023-05-27 13:37:20 +05:30
parent 7af52d1f3e
commit 37d003b926
11 changed files with 65 additions and 14 deletions
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4
Apps/FailoverApp/Address.cs
View File

@@ -147,6 +147,10 @@ namespace Failover
public Task<DnsDatagram> ProcessRequestAsync(DnsDatagram request, IPEndPoint remoteEP, DnsTransportProtocol protocol, bool isRecursionAllowed, string zoneName, string appRecordName, uint appRecordTtl, string appRecordData)
{
DnsQuestionRecord question = request.Question[0];
if (!question.Name.Equals(appRecordName, StringComparison.OrdinalIgnoreCase))
return Task.FromResult<DnsDatagram>(null);
switch (question.Type)
{
case DnsResourceRecordType.A:

3
Apps/FailoverApp/CNAME.cs
View File

@@ -120,6 +120,9 @@ namespace Failover
{
DnsQuestionRecord question = request.Question[0];
if (!question.Name.Equals(appRecordName, StringComparison.OrdinalIgnoreCase))
return Task.FromResult<DnsDatagram>(null);
using JsonDocument jsonDocument = JsonDocument.Parse(appRecordData);
JsonElement jsonAppRecordData = jsonDocument.RootElement;

5
Apps/GeoContinentApp/Address.cs
View File

@@ -19,6 +19,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
using DnsServerCore.ApplicationCommon;
using MaxMind.GeoIP2.Responses;
using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
@@ -78,6 +79,10 @@ namespace GeoContinent
public Task<DnsDatagram> ProcessRequestAsync(DnsDatagram request, IPEndPoint remoteEP, DnsTransportProtocol protocol, bool isRecursionAllowed, string zoneName, string appRecordName, uint appRecordTtl, string appRecordData)
{
DnsQuestionRecord question = request.Question[0];
if (!question.Name.Equals(appRecordName, StringComparison.OrdinalIgnoreCase))
return Task.FromResult<DnsDatagram>(null);
switch (question.Type)
{
case DnsResourceRecordType.A:

11
Apps/GeoContinentApp/CNAME.cs
View File

@@ -76,6 +76,11 @@ namespace GeoContinent
public Task<DnsDatagram> ProcessRequestAsync(DnsDatagram request, IPEndPoint remoteEP, DnsTransportProtocol protocol, bool isRecursionAllowed, string zoneName, string appRecordName, uint appRecordTtl, string appRecordData)
{
DnsQuestionRecord question = request.Question[0];
if (!question.Name.Equals(appRecordName, StringComparison.OrdinalIgnoreCase))
return Task.FromResult<DnsDatagram>(null);
using JsonDocument jsonDocument = JsonDocument.Parse(appRecordData);
JsonElement jsonAppRecordData = jsonDocument.RootElement;
JsonElement jsonContinent = default;
@@ -114,10 +119,10 @@ namespace GeoContinent
IReadOnlyList<DnsResourceRecord> answers;
if (request.Question[0].Name.Equals(zoneName, StringComparison.OrdinalIgnoreCase)) //check for zone apex
answers = new DnsResourceRecord[] { new DnsResourceRecord(request.Question[0].Name, DnsResourceRecordType.ANAME, DnsClass.IN, appRecordTtl, new DnsANAMERecordData(cname)) }; //use ANAME
if (question.Name.Equals(zoneName, StringComparison.OrdinalIgnoreCase)) //check for zone apex
answers = new DnsResourceRecord[] { new DnsResourceRecord(question.Name, DnsResourceRecordType.ANAME, DnsClass.IN, appRecordTtl, new DnsANAMERecordData(cname)) }; //use ANAME
else
answers = new DnsResourceRecord[] { new DnsResourceRecord(request.Question[0].Name, DnsResourceRecordType.CNAME, DnsClass.IN, appRecordTtl, new DnsCNAMERecordData(cname)) };
answers = new DnsResourceRecord[] { new DnsResourceRecord(question.Name, DnsResourceRecordType.CNAME, DnsClass.IN, appRecordTtl, new DnsCNAMERecordData(cname)) };
EDnsOption[] options;

5
Apps/GeoCountryApp/Address.cs
View File

@@ -19,6 +19,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
using DnsServerCore.ApplicationCommon;
using MaxMind.GeoIP2.Responses;
using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
@@ -78,6 +79,10 @@ namespace GeoCountry
public Task<DnsDatagram> ProcessRequestAsync(DnsDatagram request, IPEndPoint remoteEP, DnsTransportProtocol protocol, bool isRecursionAllowed, string zoneName, string appRecordName, uint appRecordTtl, string appRecordData)
{
DnsQuestionRecord question = request.Question[0];
if (!question.Name.Equals(appRecordName, StringComparison.OrdinalIgnoreCase))
return Task.FromResult<DnsDatagram>(null);
switch (question.Type)
{
case DnsResourceRecordType.A:

11
Apps/GeoCountryApp/CNAME.cs
View File

@@ -76,6 +76,11 @@ namespace GeoCountry
public Task<DnsDatagram> ProcessRequestAsync(DnsDatagram request, IPEndPoint remoteEP, DnsTransportProtocol protocol, bool isRecursionAllowed, string zoneName, string appRecordName, uint appRecordTtl, string appRecordData)
{
DnsQuestionRecord question = request.Question[0];
if (!question.Name.Equals(appRecordName, StringComparison.OrdinalIgnoreCase))
return Task.FromResult<DnsDatagram>(null);
using JsonDocument jsonDocument = JsonDocument.Parse(appRecordData);
JsonElement jsonAppRecordData = jsonDocument.RootElement;
JsonElement jsonCountry = default;
@@ -114,10 +119,10 @@ namespace GeoCountry
IReadOnlyList<DnsResourceRecord> answers;
if (request.Question[0].Name.Equals(zoneName, StringComparison.OrdinalIgnoreCase)) //check for zone apex
answers = new DnsResourceRecord[] { new DnsResourceRecord(request.Question[0].Name, DnsResourceRecordType.ANAME, DnsClass.IN, appRecordTtl, new DnsANAMERecordData(cname)) }; //use ANAME
if (question.Name.Equals(zoneName, StringComparison.OrdinalIgnoreCase)) //check for zone apex
answers = new DnsResourceRecord[] { new DnsResourceRecord(question.Name, DnsResourceRecordType.ANAME, DnsClass.IN, appRecordTtl, new DnsANAMERecordData(cname)) }; //use ANAME
else
answers = new DnsResourceRecord[] { new DnsResourceRecord(request.Question[0].Name, DnsResourceRecordType.CNAME, DnsClass.IN, appRecordTtl, new DnsCNAMERecordData(cname)) };
answers = new DnsResourceRecord[] { new DnsResourceRecord(question.Name, DnsResourceRecordType.CNAME, DnsClass.IN, appRecordTtl, new DnsCNAMERecordData(cname)) };
EDnsOption[] options;

4
Apps/GeoDistanceApp/Address.cs
View File

@@ -95,6 +95,10 @@ namespace GeoDistance
public Task<DnsDatagram> ProcessRequestAsync(DnsDatagram request, IPEndPoint remoteEP, DnsTransportProtocol protocol, bool isRecursionAllowed, string zoneName, string appRecordName, uint appRecordTtl, string appRecordData)
{
DnsQuestionRecord question = request.Question[0];
if (!question.Name.Equals(appRecordName, StringComparison.OrdinalIgnoreCase))
return Task.FromResult<DnsDatagram>(null);
switch (question.Type)
{
case DnsResourceRecordType.A:

11
Apps/GeoDistanceApp/CNAME.cs
View File

@@ -93,6 +93,11 @@ namespace GeoDistance
public Task<DnsDatagram> ProcessRequestAsync(DnsDatagram request, IPEndPoint remoteEP, DnsTransportProtocol protocol, bool isRecursionAllowed, string zoneName, string appRecordName, uint appRecordTtl, string appRecordData)
{
DnsQuestionRecord question = request.Question[0];
if (!question.Name.Equals(appRecordName, StringComparison.OrdinalIgnoreCase))
return Task.FromResult<DnsDatagram>(null);
Location location = null;
bool ecsUsed = false;
@@ -146,10 +151,10 @@ namespace GeoDistance
IReadOnlyList<DnsResourceRecord> answers;
if (request.Question[0].Name.Equals(zoneName, StringComparison.OrdinalIgnoreCase)) //check for zone apex
answers = new DnsResourceRecord[] { new DnsResourceRecord(request.Question[0].Name, DnsResourceRecordType.ANAME, DnsClass.IN, appRecordTtl, new DnsANAMERecordData(cname)) }; //use ANAME
if (question.Name.Equals(zoneName, StringComparison.OrdinalIgnoreCase)) //check for zone apex
answers = new DnsResourceRecord[] { new DnsResourceRecord(question.Name, DnsResourceRecordType.ANAME, DnsClass.IN, appRecordTtl, new DnsANAMERecordData(cname)) }; //use ANAME
else
answers = new DnsResourceRecord[] { new DnsResourceRecord(request.Question[0].Name, DnsResourceRecordType.CNAME, DnsClass.IN, appRecordTtl, new DnsCNAMERecordData(cname)) };
answers = new DnsResourceRecord[] { new DnsResourceRecord(question.Name, DnsResourceRecordType.CNAME, DnsClass.IN, appRecordTtl, new DnsCNAMERecordData(cname)) };
EDnsOption[] options;

5
Apps/SplitHorizonApp/SimpleAddress.cs
View File

@@ -18,6 +18,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
using DnsServerCore.ApplicationCommon;
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
@@ -139,6 +140,10 @@ namespace SplitHorizon
public Task<DnsDatagram> ProcessRequestAsync(DnsDatagram request, IPEndPoint remoteEP, DnsTransportProtocol protocol, bool isRecursionAllowed, string zoneName, string appRecordName, uint appRecordTtl, string appRecordData)
{
DnsQuestionRecord question = request.Question[0];
if (!question.Name.Equals(appRecordName, StringComparison.OrdinalIgnoreCase))
return Task.FromResult<DnsDatagram>(null);
switch (question.Type)
{
case DnsResourceRecordType.A:

6
Apps/SplitHorizonApp/SimpleCNAME.cs
View File

@@ -50,6 +50,11 @@ namespace SplitHorizon
public Task<DnsDatagram> ProcessRequestAsync(DnsDatagram request, IPEndPoint remoteEP, DnsTransportProtocol protocol, bool isRecursionAllowed, string zoneName, string appRecordName, uint appRecordTtl, string appRecordData)
{
DnsQuestionRecord question = request.Question[0];
if (!question.Name.Equals(appRecordName, StringComparison.OrdinalIgnoreCase))
return Task.FromResult<DnsDatagram>(null);
using JsonDocument jsonDocument = JsonDocument.Parse(appRecordData);
JsonElement jsonAppRecordData = jsonDocument.RootElement;
JsonElement jsonCname = default;
@@ -105,7 +110,6 @@ namespace SplitHorizon
if (string.IsNullOrEmpty(cname))
return Task.FromResult<DnsDatagram>(null);
DnsQuestionRecord question = request.Question[0];
IReadOnlyList<DnsResourceRecord> answers;
if (question.Name.Equals(zoneName, StringComparison.OrdinalIgnoreCase)) //check for zone apex

14
Apps/WhatIsMyDnsApp/App.cs
View File

@@ -18,6 +18,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
using DnsServerCore.ApplicationCommon;
using System;
using System.Net;
using System.Net.Sockets;
using System.Threading.Tasks;
@@ -47,26 +48,31 @@ namespace WhatIsMyDns
public Task<DnsDatagram> ProcessRequestAsync(DnsDatagram request, IPEndPoint remoteEP, DnsTransportProtocol protocol, bool isRecursionAllowed, string zoneName, string appRecordName, uint appRecordTtl, string appRecordData)
{
DnsQuestionRecord question = request.Question[0];
if (!question.Name.Equals(appRecordName, StringComparison.OrdinalIgnoreCase))
return Task.FromResult<DnsDatagram>(null);
DnsResourceRecord answer;
switch (request.Question[0].Type)
switch (question.Type)
{
case DnsResourceRecordType.A:
if (remoteEP.AddressFamily != AddressFamily.InterNetwork)
return Task.FromResult<DnsDatagram>(null);
answer = new DnsResourceRecord(request.Question[0].Name, DnsResourceRecordType.A, DnsClass.IN, appRecordTtl, new DnsARecordData(remoteEP.Address));
answer = new DnsResourceRecord(question.Name, DnsResourceRecordType.A, DnsClass.IN, appRecordTtl, new DnsARecordData(remoteEP.Address));
break;
case DnsResourceRecordType.AAAA:
if (remoteEP.AddressFamily != AddressFamily.InterNetworkV6)
return Task.FromResult<DnsDatagram>(null);
answer = new DnsResourceRecord(request.Question[0].Name, DnsResourceRecordType.AAAA, DnsClass.IN, appRecordTtl, new DnsAAAARecordData(remoteEP.Address));
answer = new DnsResourceRecord(question.Name, DnsResourceRecordType.AAAA, DnsClass.IN, appRecordTtl, new DnsAAAARecordData(remoteEP.Address));
break;
case DnsResourceRecordType.TXT:
answer = new DnsResourceRecord(request.Question[0].Name, DnsResourceRecordType.TXT, DnsClass.IN, appRecordTtl, new DnsTXTRecordData(remoteEP.Address.ToString()));
answer = new DnsResourceRecord(question.Name, DnsResourceRecordType.TXT, DnsClass.IN, appRecordTtl, new DnsTXTRecordData(remoteEP.Address.ToString()));
break;
default: