| 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) |
| 83 | (defmethod reverse-domain-suffix ((ipaddr ip4addr)) |
| 84 | (make-domain-name :labels (list "arpa" "in-addr") :absolutep t)) |
| 85 | |
| 86 | ;;;----- That's all, folks -------------------------------------------------- |