42 lines
2.1 KiB
C#
42 lines
2.1 KiB
C#
/*
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Technitium DNS Server
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Copyright (C) 2025 Shreyas Zare (shreyas@technitium.com)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System.Net;
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using System.Threading.Tasks;
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using TechnitiumLibrary.Net.Dns;
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namespace DnsServerCore.ApplicationCommon
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{
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/// <summary>
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/// Lets a DNS App process a response generated by the DNS server allowing it to make changes to the final response that will be sent to the client.
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/// </summary>
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public interface IDnsPostProcessor
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{
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/// <summary>
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/// Allows a DNS App to process the response generated by the DNS server for a given request. This method is called by the DNS Server after a response is generated before being sent to the client. Response returned by this method may be processed by another DNS app performing post processing.
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/// </summary>
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/// <param name="request">The incoming DNS request received by the DNS server.</param>
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/// <param name="remoteEP">The end point (IP address and port) of the client making the request.</param>
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/// <param name="protocol">The protocol using which the request was received.</param>
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/// <param name="response">The DNS response that was generated by the DNS server for the received DNS request or from another DNS app that performed post processing.</param>
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/// <returns>The DNS response that the DNS server should send to the client or <c>null</c> to drop the DNS request.</returns>
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Task<DnsDatagram> PostProcessAsync(DnsDatagram request, IPEndPoint remoteEP, DnsTransportProtocol protocol, DnsDatagram response);
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}
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}
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