59 lines
2.2 KiB
C#
59 lines
2.2 KiB
C#
/*
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Technitium DNS Server
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Copyright (C) 2021 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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public enum DnsRequestControllerAction
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{
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/// <summary>
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/// Allow the request to be processed.
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/// </summary>
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Allow = 0,
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/// <summary>
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/// Drop the request without any response.
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/// </summary>
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DropSilently = 1,
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/// <summary>
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/// Drop the request with a Refused response.
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/// </summary>
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DropWithRefused = 2
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}
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/// <summary>
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/// Allows a DNS App to inspect and optionally drop incoming DNS requests before they are processed by the DNS Server core.
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/// </summary>
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public interface IDnsRequestController
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{
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/// <summary>
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/// Allows a DNS App to inspect an incoming DNS request and decide whether to allow or drop it. This method is called by the DNS Server before an incoming request is processed.
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/// </summary>
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/// <param name="request">The incoming DNS request.</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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/// <returns>The action that must be taken by the DNS server i.e. if the request must be allowed or dropped.</returns>
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Task<DnsRequestControllerAction> GetRequestActionAsync(DnsDatagram request, IPEndPoint remoteEP, DnsTransportProtocol protocol);
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}
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}
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