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114 lines
4.2 KiB
114 lines
4.2 KiB
// Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
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//
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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, version 2.0, as
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// published by the Free Software Foundation.
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//
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// This program is also distributed with certain software (including
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// but not limited to OpenSSL) that is licensed under separate terms,
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// as designated in a particular file or component or in included license
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// documentation. The authors of MySQL hereby grant you an
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// additional permission to link the program and your derivative works
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// with the separately licensed software that they have included with
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// MySQL.
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//
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// Without limiting anything contained in the foregoing, this file,
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// which is part of MySQL Connector/NET, is also subject to the
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// Universal FOSS Exception, version 1.0, a copy of which can be found at
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// http://oss.oracle.com/licenses/universal-foss-exception.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License, version 2.0, for more details.
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//
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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, write to the Free Software Foundation, Inc.,
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// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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using System.Collections.Generic;
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using Ubiety.Dns.Core.Records;
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namespace MySql.Data.Common
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{
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/// <summary>
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/// Class that represents a DNS SRV record.
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/// RFC 2782 (https://tools.ietf.org/html/rfc2782)
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/// </summary>
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internal class DnsSrvRecord : IComparer<DnsSrvRecord>
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{
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/// <summary>
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/// Gets the port.
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/// </summary>
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internal int Port { get; }
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/// <summary>
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/// Gets the priority.
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/// </summary>
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internal int Priority { get; }
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/// <summary>
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/// Gets the target domain name.
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/// </summary>
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internal string Target { get; }
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/// <summary>
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/// Gets the weight.
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/// </summary>
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internal int Weight { get; }
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/// <summary>
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/// Initializes a new instance of <see cref="DnsSrvRecord"/> class.
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/// </summary>
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/// <param name="port">The port.</param>
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/// <param name="priority">The priority.</param>
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/// <param name="target">The target.</param>
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/// <param name="weight">The weight.</param>
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internal DnsSrvRecord(int port, int priority, string target, int weight)
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{
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this.Port = port;
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this.Priority = priority;
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this.Target = target;
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this.Weight = weight;
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}
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internal DnsSrvRecord() { }
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/// <summary>
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/// Initializes a new instance of <see cref="DnsSrvRecord"/> class.
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/// </summary>
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/// <param name="recordSRV">The DNS SRV record.</param>
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internal DnsSrvRecord(RecordSrv recordSRV)
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: this(recordSRV.Port, recordSRV.Priority, recordSRV.Target, recordSRV.Weight)
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{ }
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/// <summary>
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/// Compare two <see cref="DnsSrvRecord"/> objects. First, using their priority and
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/// if both have the same, then using their weights.
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/// </summary>
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/// <param name="x">A <see cref="DnsSrvRecord"/> to compare.</param>
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/// <param name="y">A <see cref="DnsSrvRecord"/> to compare.</param>
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/// <returns></returns>
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public int Compare(DnsSrvRecord x, DnsSrvRecord y)
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{
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int priorityDiff = x.Priority.CompareTo(y.Priority);
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return priorityDiff == 0 ? y.Weight.CompareTo(x.Weight) : priorityDiff;
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="DnsSrvRecord"/> class from a <see cref="RecordSrv"/>.
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/// </summary>
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/// <param name="recordSRV">The DNS SRV record.</param>
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public static implicit operator DnsSrvRecord(RecordSrv recordSRV)
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{
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if (recordSRV == null)
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{
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return null;
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}
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recordSRV.Target = recordSRV.Target.TrimEnd('.');
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return new DnsSrvRecord(recordSRV);
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}
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}
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}
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