41 lines
1.8 KiB
Ada
41 lines
1.8 KiB
Ada
----------------------------------------------------------------
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-- IRONSIDES - DNS SERVER
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--
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-- By: Martin C. Carlisle and Barry S. Fagin
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-- Department of Computer Science
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-- United States Air Force Academy
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--
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-- This is free software; you can redistribute it and/or
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-- modify without restriction. We do ask that you please keep
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-- the original author information, and clearly indicate if the
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-- software has been modified.
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--
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-- This software is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty
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-- of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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----------------------------------------------------------------
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with Unsigned_Types;
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use type Unsigned_Types.Unsigned32,Unsigned_Types.Unsigned16;
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--#inherit rr_type, unsigned_types;
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package Rr_Type.Mx_Record_Type is
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--sufficiently below 2^16-1 that we can detect too large values without wraparound
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MAX_PREF_VAL : constant Unsigned_Types.Unsigned16 := 2**15-1;
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type MXRecordType is new Rr_Type.ResourceRecordType with
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record
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Pref : Unsigned_Types.Unsigned16; --change MAX_PREF_VAL above if this type changes
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MailExchanger : Rr_Type.WireStringType;
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end record;
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--placeholder for empty slots in hash table
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BlankMXRecord : constant MXRecordType := MXRecordType'(
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TtlInSeconds => 0,
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Class => Rr_Type.INTERNET, Pref => 0,
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MailExchanger => "empty.MX.resource.record " & Rr_Type.Spaces32
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& Rr_Type.Spaces32 & Rr_Type.Spaces32);
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--hash table (2d array) for MX records
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type MXRecordBucketType is array (Rr_Type.ReturnedRecordsIndexType) of MXRecordType;
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type MXRecordHashTableType is array (Rr_Type.NumBucketsIndexType) of MXRecordBucketType;
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end Rr_Type.Mx_Record_Type;
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