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1 | ;;; -*-lisp-*- |
2 | ;;; | |
3 | ;;; IPv6 address family support | |
4 | ;;; | |
5 | ;;; (c) 2005 Straylight/Edgeware | |
6 | ;;; | |
7 | ||
8 | ;;;----- Licensing notice --------------------------------------------------- | |
9 | ;;; | |
10 | ;;; This program is free software; you can redistribute it and/or modify | |
11 | ;;; it under the terms of the GNU General Public License as published by | |
12 | ;;; the Free Software Foundation; either version 2 of the License, or | |
13 | ;;; (at your option) any later version. | |
14 | ;;; | |
15 | ;;; This program is distributed in the hope that it will be useful, | |
16 | ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;;; GNU General Public License for more details. | |
19 | ;;; | |
20 | ;;; You should have received a copy of the GNU General Public License | |
21 | ;;; along with this program; if not, write to the Free Software Foundation, | |
22 | ;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | ||
24 | (in-package #:net) | |
25 | ||
26 | ;;;-------------------------------------------------------------------------- | |
27 | ;;; Basic address type. | |
28 | ||
29 | (deftype u32 () | |
30 | "The type of unsigned 32-bit values." | |
31 | '(unsigned-byte 32)) | |
32 | ||
33 | (export 'ip4addr) | |
34 | (defclass ip4addr (ipaddr) | |
35 | ((addr :type u32 :initarg :addr :reader ipaddr-addr))) | |
36 | ||
37 | (defmethod family-addrclass ((family (eql :ipv4))) 'ip4addr) | |
38 | ||
39 | (defmethod ipaddr-family ((addr ip4addr)) :ipv4) | |
40 | (defmethod ipaddr-width ((class (eql 'ip4addr))) 32) | |
41 | (defmethod ipaddr-rrtype ((addr ip4addr)) :a) | |
42 | ||
43 | (defun parse-partial-ip4addr (str &key (start 0) (end nil) (min 1) (max 32)) | |
44 | "Parse (a substring of) STR as a partial IPv4 address." | |
45 | (parse-partial-address str :start start :end end | |
46 | :delim #\. :width 8 :radix 10 | |
47 | :min min :max max :shiftp t | |
48 | :what "IPv4 address")) | |
49 | ||
50 | (defmethod parse-partial-ipaddr ((class (eql 'ip4addr)) str | |
51 | &key (start 0) (end nil) (min 1) (max 32)) | |
52 | (parse-partial-ip4addr str :start start :end end :min min :max max)) | |
53 | ||
54 | (defmethod ipaddr-string ((ip ip4addr)) | |
55 | "Convert IP into an IPv4 dotted-quad address string." | |
56 | (let ((addr (ipaddr-addr ip))) | |
57 | (join-strings #\. (collecting () | |
58 | (dotimes (i 4) | |
59 | (collect (ldb (byte 8 (- 24 (* i 8))) addr))))))) | |
60 | ||
61 | ;;;-------------------------------------------------------------------------- | |
62 | ;;; IPv4 networks. | |
63 | ||
64 | (defmethod ipmask ((addr ip4addr) (mask ip4addr)) | |
65 | (ipaddr-addr mask)) | |
66 | ||
67 | (defclass ip4net (ipnet) | |
68 | ((net :type ip4addr :initarg :net :reader ipnet-net) | |
69 | (mask :type u32 :initarg :mask :reader ipnet-mask))) | |
70 | ||
71 | (defmethod ipaddr-ipnet ((addr ip4addr) mask) | |
72 | (make-instance 'ip4net :net addr :mask mask)) | |
73 | ||
74 | (defmethod ipnet-broadcast ((ipn ip4net)) | |
75 | (with-ipnet (nil addr mask) ipn | |
76 | (make-instance 'ip4addr :addr (logior addr (logxor mask #xffffffff))))) | |
77 | ||
78 | ;;;-------------------------------------------------------------------------- | |
79 | ;;; Reverse lookups. | |
80 | ||
81 | (defmethod reverse-domain-component-width ((ipaddr ip4addr)) 8) | |
82 | (defmethod reverse-domain-radix ((ipaddr ip4addr)) 10) | |
db43369d MW |
83 | (defmethod reverse-domain-suffix ((ipaddr ip4addr)) |
84 | (make-domain-name :labels (list "arpa" "in-addr") :absolutep t)) | |
32ebbe9b MW |
85 | |
86 | ;;;----- That's all, folks -------------------------------------------------- |