net.sockets/dns/common.lisp

   1 ;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; indent-tabs-mode: nil -*-
   2 ;;;
   3 ;;; common.lisp --- DNS client constants.
   4 ;;;
   5 ;;; Copyright (C) 2006-2008, Stelian Ionescu  <sionescu@common-lisp.net>
   6 ;;;
   7 ;;; This code is free software; you can redistribute it and/or
   8 ;;; modify it under the terms of the version 2.1 of
   9 ;;; the GNU Lesser General Public License as published by
  10 ;;; the Free Software Foundation, as clarified by the
  11 ;;; preamble found here:
  12 ;;;     http://opensource.franz.com/preamble.html
  13 ;;;
  14 ;;; This program is distributed in the hope that it will be useful,
  15 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;;; GNU General Public License for more details.
  18 ;;;
  19 ;;; You should have received a copy of the GNU Lesser General
  20 ;;; Public License along with this library; if not, write to the
  21 ;;; Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
  22 ;;; Boston, MA 02110-1301, USA
  23
  24 (in-package :net.sockets)
  25
  26 (defconstant +dns-max-datagram-size+ 4096)
  27
  28 (defconstant +opcode-standard+ 0)
  29
  30 ;;; Query types
  31
  32 (define-constant +query-type-to-value-map+
  33     #h:eq{:a => 1 , :ns => 2 , :cname => 5 , :soa => 6 ,
  34           :wks => 11 , :ptr => 12 , :hinfo => 13 , :mx => 15 ,
  35           :txt => 16 , :aaaa => 28 , :any => 255}
  36     :test #'equalp)
  37
  38 (define-constant +query-value-to-type-map+
  39     #h{1 => :a ,  2 => :ns , 5 => :cname , 6 => :soa ,
  40        11 => :wks , 12 => :ptr , 13 => :hinfo , 15 => :mx ,
  41        16 => :txt , 28 => :aaaa , 255 => :any}
  42     :test #'equalp)
  43
  44 (defun query-type-number (id)
  45   (gethash id +query-type-to-value-map+))
  46
  47 (defun query-type-id (number)
  48   (gethash number +query-value-to-type-map+))
  49
  50 (defun dns-record-type-p (id)
  51   (query-type-number id))
  52
  53 ;;; Query classes
  54
  55 (define-constant +query-class-to-value-map+
  56     #h:eq{:in => 1 , :any => 255}
  57     :test #'equalp)
  58
  59 (define-constant +query-value-to-class-map+
  60     #h{1 => :in , 255 => :any}
  61     :test #'equalp)
  62
  63 (defun query-class-number (id)
  64   (gethash id +query-class-to-value-map+))
  65
  66 (defun query-class-id (number)
  67   (gethash number +query-value-to-class-map+))
  68
  69 ;;; Error codes
  70
  71 (define-constant +rcode-to-value-map+
  72     #h:eq{:no-error => 0 , :format-error => 1 ,
  73           :server-failure => 2 , :name-error => 3 ,
  74           :not-implemented => 4 , :refused => 5}
  75     :test #'equalp)
  76
  77 (define-constant +value-to-rcode-map+
  78     #h{0 => :no-error , 1 => :format-error ,
  79        2 => :server-failure , 3 => :name-error ,
  80        4 => :not-implemented , 5 => :refused}
  81     :test #'equalp)
  82
  83 (defun rcode-number (id)
  84   (gethash id +rcode-to-value-map+))
  85
  86 (defun rcode-id (number)
  87   (gethash number +value-to-rcode-map+))