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7e282fb5 | 1 | ;;; -*-lisp-*- |
2 | ;;; | |
3 | ;;; $Id$ | |
4 | ;;; | |
5 | ;;; DNS zone generation | |
6 | ;;; | |
7 | ;;; (c) 2005 Straylight/Edgeware | |
8 | ;;; | |
9 | ||
10 | ;;;----- Licensing notice --------------------------------------------------- | |
11 | ;;; | |
12 | ;;; This program is free software; you can redistribute it and/or modify | |
13 | ;;; it under the terms of the GNU General Public License as published by | |
14 | ;;; the Free Software Foundation; either version 2 of the License, or | |
15 | ;;; (at your option) any later version. | |
16 | ;;; | |
17 | ;;; This program is distributed in the hope that it will be useful, | |
18 | ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;;; GNU General Public License for more details. | |
21 | ;;; | |
22 | ;;; You should have received a copy of the GNU General Public License | |
23 | ;;; along with this program; if not, write to the Free Software Foundation, | |
24 | ;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | ||
fe5fb85a MW |
26 | ;;;-------------------------------------------------------------------------- |
27 | ;;; Packaging. | |
28 | ||
7e282fb5 | 29 | (defpackage #:zone |
80055495 | 30 | (:use #:common-lisp #:mdw.base #:mdw.str #:mdw.collect #:safely) |
7e282fb5 | 31 | (:export #:ipaddr #:string-ipaddr #:ipaddr-byte #:ipaddr-string #:ipaddrp |
32 | #:integer-netmask #:ipmask #:ipmask-cidl-slash #:make-ipnet | |
33 | #:string-ipnet #:ipnet #:ipnet-net #:ipnet-mask #:with-ipnet | |
34 | #:ipnet-pretty #:ipnet-string #:ipnet-broadcast #:ipnet-hosts | |
35 | #:ipnet-host #:ipaddr-networkp #:ipnet-subnetp | |
36 | #:host-find# #:host-create #:defhost #:parse-ipaddr | |
37 | #:net #:net-find #:net-get-as-ipnet #:net-create #:defnet | |
38 | #:net-next-host #:net-host | |
39 | #:soa #:mx #:zone #:zone-record #:zone-subdomain | |
40 | #:*default-zone-source* #:*default-zone-refresh* | |
41 | #:*default-zone-retry* #:*default-zone-expire* | |
42 | #:*default-zone-min-ttl* #:*default-zone-ttl* | |
43 | #:*default-mx-priority* #:*default-zone-admin* | |
44 | #:zone-find #:zone-parse #:zone-write #:zone-create #:defzone | |
45 | #:defrevzone #:zone-save | |
a15288b4 | 46 | #:defzoneparse #:zone-parse-host |
7e282fb5 | 47 | #:timespec-seconds #:make-zone-serial)) |
fe5fb85a | 48 | |
7e282fb5 | 49 | (in-package #:zone) |
50 | ||
fe5fb85a MW |
51 | ;;;-------------------------------------------------------------------------- |
52 | ;;; Basic types. | |
53 | ||
7e282fb5 | 54 | (defun mask (n) |
55 | "Return 2^N - 1: i.e., a mask of N set bits." | |
56 | (1- (ash 1 n))) | |
57 | (deftype u32 () | |
58 | "The type of unsigned 32-bit values." | |
59 | '(unsigned-byte 32)) | |
60 | (deftype ipaddr () | |
61 | "The type of IP (version 4) addresses." | |
62 | 'u32) | |
63 | ||
fe5fb85a MW |
64 | ;;;-------------------------------------------------------------------------- |
65 | ;;; Various random utilities. | |
66 | ||
67 | (defun to-integer (x) | |
68 | "Convert X to an integer in the most straightforward way." | |
69 | (floor (rational x))) | |
70 | ||
71 | (defun from-mixed-base (base val) | |
72 | "BASE is a list of the ranges for the `digits' of a mixed-base | |
73 | representation. Convert VAL, a list of digits, into an integer." | |
74 | (do ((base base (cdr base)) | |
75 | (val (cdr val) (cdr val)) | |
76 | (a (car val) (+ (* a (car base)) (car val)))) | |
77 | ((or (null base) (null val)) a))) | |
78 | ||
79 | (defun to-mixed-base (base val) | |
80 | "BASE is a list of the ranges for the `digits' of a mixed-base | |
81 | representation. Convert VAL, an integer, into a list of digits." | |
82 | (let ((base (reverse base)) | |
83 | (a nil)) | |
84 | (loop | |
85 | (unless base | |
86 | (push val a) | |
87 | (return a)) | |
88 | (multiple-value-bind (q r) (floor val (pop base)) | |
89 | (push r a) | |
90 | (setf val q))))) | |
91 | ||
92 | (defun timespec-seconds (ts) | |
93 | "Convert a timespec TS to seconds. A timespec may be a real count of | |
94 | seconds, or a list (COUNT UNIT): UNIT may be any of a number of obvious time | |
95 | units." | |
96 | (cond ((null ts) 0) | |
97 | ((realp ts) (floor ts)) | |
98 | ((atom ts) | |
99 | (error "Unknown timespec format ~A" ts)) | |
100 | ((null (cdr ts)) | |
101 | (timespec-seconds (car ts))) | |
102 | (t (+ (to-integer (* (car ts) | |
103 | (case (intern (string-upcase | |
104 | (stringify (cadr ts))) | |
105 | '#:zone) | |
106 | ((s sec secs second seconds) 1) | |
107 | ((m min mins minute minutes) 60) | |
108 | ((h hr hrs hour hours) #.(* 60 60)) | |
109 | ((d dy dys day days) #.(* 24 60 60)) | |
110 | ((w wk wks week weeks) #.(* 7 24 60 60)) | |
111 | ((y yr yrs year years) #.(* 365 24 60 60)) | |
112 | (t (error "Unknown time unit ~A" | |
113 | (cadr ts)))))) | |
114 | (timespec-seconds (cddr ts)))))) | |
115 | ||
116 | (defun hash-table-keys (ht) | |
117 | "Return a list of the keys in hashtable HT." | |
118 | (collecting () | |
119 | (maphash (lambda (key val) (declare (ignore val)) (collect key)) ht))) | |
120 | ||
121 | (defun iso-date (&optional time &key datep timep (sep #\ )) | |
122 | "Construct a textual date or time in ISO format. The TIME is the universal | |
123 | time to convert, which defaults to now; DATEP is whether to emit the date; | |
124 | TIMEP is whether to emit the time, and SEP (default is space) is how to | |
125 | separate the two." | |
126 | (multiple-value-bind | |
127 | (sec min hr day mon yr dow dstp tz) | |
128 | (decode-universal-time (if (or (null time) (eq time :now)) | |
129 | (get-universal-time) | |
130 | time)) | |
131 | (declare (ignore dow dstp tz)) | |
132 | (with-output-to-string (s) | |
133 | (when datep | |
134 | (format s "~4,'0D-~2,'0D-~2,'0D" yr mon day) | |
135 | (when timep | |
136 | (write-char sep s))) | |
137 | (when timep | |
138 | (format s "~2,'0D:~2,'0D:~2,'0D" hr min sec))))) | |
139 | ||
b90cef0d MW |
140 | (defun count-low-zero-bits (n) |
141 | "Return the number of low-order zero bits in the integer N." | |
142 | (if (zerop n) nil | |
143 | (loop for i from 0 | |
144 | until (logbitp i n) | |
145 | finally (return i)))) | |
146 | ||
fe5fb85a MW |
147 | ;;;-------------------------------------------------------------------------- |
148 | ;;; Simple messing with IP addresses. | |
149 | ||
7e282fb5 | 150 | (defun string-ipaddr (str &key (start 0) (end nil)) |
151 | "Parse STR as an IP address in dotted-quad form and return the integer | |
152 | equivalent. STR may be anything at all: it's converted as if by | |
153 | `stringify'. The START and END arguments may be used to parse out a | |
154 | substring." | |
155 | (setf str (stringify str)) | |
156 | (unless end | |
157 | (setf end (length str))) | |
158 | (let ((addr 0) (noct 0)) | |
159 | (loop | |
160 | (let* ((pos (position #\. str :start start :end end)) | |
161 | (i (parse-integer str :start start :end (or pos end)))) | |
162 | (unless (<= 0 i 256) | |
163 | (error "IP address octet out of range")) | |
164 | (setf addr (+ (* addr 256) i)) | |
165 | (incf noct) | |
166 | (unless pos | |
167 | (return)) | |
168 | (setf start (1+ pos)))) | |
169 | (unless (= noct 4) | |
170 | (error "Wrong number of octets in IP address")) | |
171 | addr)) | |
fe5fb85a | 172 | |
7e282fb5 | 173 | (defun ipaddr-byte (ip n) |
174 | "Return byte N (from most significant downwards) of an IP address." | |
175 | (assert (<= 0 n 3)) | |
176 | (logand #xff (ash ip (* -8 (- 3 n))))) | |
fe5fb85a | 177 | |
7e282fb5 | 178 | (defun ipaddr-string (ip) |
179 | "Transform the address IP into a string in dotted-quad form." | |
180 | (check-type ip ipaddr) | |
181 | (join-strings #\. (collecting () | |
182 | (dotimes (i 4) | |
183 | (collect (ipaddr-byte ip i)))))) | |
fe5fb85a | 184 | |
7e282fb5 | 185 | (defun ipaddrp (ip) |
186 | "Answer true if IP is a valid IP address in integer form." | |
187 | (typep ip 'ipaddr)) | |
fe5fb85a | 188 | |
7e282fb5 | 189 | (defun ipaddr (ip) |
190 | "Convert IP to an IP address. If it's an integer, return it unchanged; | |
191 | otherwise convert by `string-ipaddr'." | |
192 | (typecase ip | |
193 | (ipaddr ip) | |
194 | (t (string-ipaddr ip)))) | |
195 | ||
fe5fb85a MW |
196 | ;;;-------------------------------------------------------------------------- |
197 | ;;; Netmasks. | |
198 | ||
7e282fb5 | 199 | (defun integer-netmask (i) |
200 | "Given an integer I, return a netmask with its I top bits set." | |
201 | (- (ash 1 32) (ash 1 (- 32 i)))) | |
fe5fb85a | 202 | |
7e282fb5 | 203 | (defun ipmask (ip) |
204 | "Transform IP into a netmask. If it's a small integer then it's converted | |
205 | by `integer-netmask'; if nil, then all-bits-set; otherwise convert using | |
206 | `ipaddr'." | |
207 | (typecase ip | |
208 | (null (mask 32)) | |
209 | ((integer 0 32) (integer-netmask ip)) | |
210 | (t (ipaddr ip)))) | |
fe5fb85a | 211 | |
7e282fb5 | 212 | (defun ipmask-cidl-slash (mask) |
213 | "Given a netmask MASK, return an integer N such that (integer-netmask N) = | |
214 | MASK, or nil if this is impossible." | |
215 | (dotimes (i 33) | |
216 | (when (= mask (integer-netmask i)) | |
217 | (return i)))) | |
218 | ||
fe5fb85a MW |
219 | ;;;-------------------------------------------------------------------------- |
220 | ;;; Networks: pairing an address and netmask. | |
221 | ||
7e282fb5 | 222 | (defun make-ipnet (net mask) |
223 | "Construct an IP-network object given the NET and MASK; these are | |
224 | transformed as though by `ipaddr' and `ipmask'." | |
225 | (let ((net (ipaddr net)) | |
226 | (mask (ipmask mask))) | |
227 | (cons (logand net mask) mask))) | |
fe5fb85a | 228 | |
7e282fb5 | 229 | (defun string-ipnet (str &key (start 0) (end nil)) |
230 | "Parse an IP-network from the string STR." | |
231 | (setf str (stringify str)) | |
232 | (unless end (setf end (length str))) | |
233 | (let ((sl (position #\/ str :start start :end end))) | |
234 | (if sl | |
235 | (make-ipnet (parse-ipaddr (subseq str start sl)) | |
236 | (if (find #\. str :start (1+ sl) :end end) | |
237 | (string-ipaddr str :start (1+ sl) :end end) | |
238 | (integer-netmask (parse-integer str | |
239 | :start (1+ sl) | |
240 | :end end)))) | |
241 | (make-ipnet (parse-ipaddr (subseq str start end)) | |
242 | (integer-netmask 32))))) | |
fe5fb85a | 243 | |
b90cef0d MW |
244 | (defun ipnet (net) |
245 | "Construct an IP-network object from the given argument. A number of | |
7e282fb5 | 246 | forms are acceptable: |
247 | ||
7e282fb5 | 248 | * ADDR -- a single address (equivalent to ADDR 32) |
249 | * (NET . MASK|nil) -- a single-object representation. | |
250 | * IPNET -- return an equivalent (`equal', not necessarily `eql') version." | |
b90cef0d | 251 | (cond ((or (stringp net) (symbolp net)) (string-ipnet net)) |
7e282fb5 | 252 | (t (apply #'make-ipnet (pairify net 32))))) |
fe5fb85a | 253 | |
7e282fb5 | 254 | (defun ipnet-net (ipn) |
255 | "Return the base network address of IPN." | |
256 | (car ipn)) | |
fe5fb85a | 257 | |
7e282fb5 | 258 | (defun ipnet-mask (ipn) |
259 | "Return the netmask of IPN." | |
260 | (cdr ipn)) | |
fe5fb85a | 261 | |
7e282fb5 | 262 | (defmacro with-ipnet ((net mask) ipn &body body) |
263 | "Evaluate BODY with NET and MASK bound to the base address and netmask of | |
264 | IPN. Either NET or MASK (or, less usefully, both) may be nil if not wanted." | |
265 | (with-gensyms tmp | |
266 | `(let ((,tmp ,ipn)) | |
267 | (let (,@(and net `((,net (ipnet-net ,tmp)))) | |
268 | ,@(and mask `((,mask (ipnet-mask ,tmp))))) | |
269 | ,@body)))) | |
fe5fb85a | 270 | |
7e282fb5 | 271 | (defun ipnet-pretty (ipn) |
272 | "Convert IPN to a pretty cons-cell form." | |
273 | (with-ipnet (net mask) ipn | |
274 | (cons (ipaddr-string net) | |
275 | (or (ipmask-cidl-slash mask) (ipaddr-string mask))))) | |
fe5fb85a | 276 | |
7e282fb5 | 277 | (defun ipnet-string (ipn) |
278 | "Convert IPN to a string." | |
279 | (with-ipnet (net mask) ipn | |
280 | (format nil "~A/~A" | |
281 | (ipaddr-string net) | |
282 | (or (ipmask-cidl-slash mask) (ipaddr-string mask))))) | |
fe5fb85a | 283 | |
7e282fb5 | 284 | (defun ipnet-broadcast (ipn) |
285 | "Return the broadcast address for the network IPN." | |
286 | (with-ipnet (net mask) ipn | |
287 | (logior net (logxor (mask 32) mask)))) | |
fe5fb85a | 288 | |
7e282fb5 | 289 | (defun ipnet-hosts (ipn) |
290 | "Return the number of available addresses in network IPN." | |
291 | (ash 1 (- 32 (logcount (ipnet-mask ipn))))) | |
fe5fb85a | 292 | |
7e282fb5 | 293 | (defun ipnet-host (ipn host) |
294 | "Return the address of the given HOST in network IPN. This works even with | |
295 | a non-contiguous netmask." | |
296 | (check-type host u32) | |
297 | (with-ipnet (net mask) ipn | |
298 | (let ((i 0) (m 1) (a net) (h host)) | |
299 | (loop | |
300 | (when (>= i 32) | |
301 | (error "Host index ~D out of range for network ~A" | |
302 | host (ipnet-pretty ipn))) | |
303 | (cond ((zerop h) | |
304 | (return a)) | |
305 | ((logbitp i mask) | |
306 | (setf h (ash h 1))) | |
307 | (t | |
308 | (setf a (logior a (logand m h))) | |
309 | (setf h (logandc2 h m)))) | |
310 | (setf m (ash m 1)) | |
311 | (incf i))))) | |
fe5fb85a | 312 | |
7e282fb5 | 313 | (defun ipaddr-networkp (ip ipn) |
314 | "Returns true if address IP is within network IPN." | |
315 | (with-ipnet (net mask) ipn | |
316 | (= net (logand ip mask)))) | |
fe5fb85a | 317 | |
7e282fb5 | 318 | (defun ipnet-subnetp (ipn subn) |
319 | "Returns true if SUBN is a (non-strict) subnet of IPN." | |
320 | (with-ipnet (net mask) ipn | |
321 | (with-ipnet (subnet submask) subn | |
322 | (and (= net (logand subnet mask)) | |
323 | (= submask (logior mask submask)))))) | |
324 | ||
fe5fb85a MW |
325 | (defun ipnet-changeable-bytes (mask) |
326 | "Answers how many low-order bytes of MASK are (entirely or partially) | |
327 | changeable. This is used when constructing reverse zones." | |
328 | (dotimes (i 4 4) | |
329 | (when (/= (ipaddr-byte mask i) 255) | |
330 | (return (- 4 i))))) | |
331 | ||
332 | ;;;-------------------------------------------------------------------------- | |
333 | ;;; Name resolution. | |
334 | ||
335 | #+cmu | |
7e282fb5 | 336 | (defun resolve-hostname (name) |
337 | "Resolve a hostname to an IP address using the DNS, or return nil." | |
338 | (let ((he (ext:lookup-host-entry name))) | |
339 | (and he | |
340 | (ext:host-entry-addr he)))) | |
fe5fb85a MW |
341 | |
342 | #+cmu | |
8a4f9a18 | 343 | (defun canonify-hostname (name) |
344 | "Resolve a hostname to canonical form using the DNS, or return nil." | |
345 | (let ((he (ext:lookup-host-entry name))) | |
346 | (and he | |
347 | (ext:host-entry-name he)))) | |
fe5fb85a MW |
348 | |
349 | ;;;-------------------------------------------------------------------------- | |
350 | ;;; Host names and specifiers. | |
351 | ||
7e282fb5 | 352 | (defun parse-ipaddr (addr) |
353 | "Convert the string ADDR into an IP address: tries all sorts of things: | |
354 | ||
355 | (NET [INDEX]) -- index a network: NET is a network name defined by defnet; | |
356 | INDEX is an index or one of the special symbols understood by net-host, | |
357 | and defaults to :next | |
358 | INTEGER -- an integer IP address | |
359 | IPADDR -- an IP address in dotted-quad form | |
360 | HOST -- a host name defined by defhost | |
361 | DNSNAME -- a name string to look up in the DNS" | |
362 | (cond ((listp addr) | |
363 | (destructuring-bind | |
364 | (net host) | |
365 | (pairify addr :next) | |
366 | (net-host (or (net-find net) | |
367 | (error "Network ~A not found" net)) | |
368 | host))) | |
369 | ((ipaddrp addr) addr) | |
370 | (t | |
371 | (setf addr (string-downcase (stringify addr))) | |
372 | (or (host-find addr) | |
373 | (and (plusp (length addr)) | |
374 | (digit-char-p (char addr 0)) | |
375 | (string-ipaddr addr)) | |
376 | (resolve-hostname (stringify addr)) | |
377 | (error "Host name ~A unresolvable" addr))))) | |
378 | ||
379 | (defvar *hosts* (make-hash-table :test #'equal) | |
380 | "The table of known hostnames.") | |
fe5fb85a | 381 | |
7e282fb5 | 382 | (defun host-find (name) |
383 | "Find a host by NAME." | |
384 | (gethash (string-downcase (stringify name)) *hosts*)) | |
fe5fb85a | 385 | |
7e282fb5 | 386 | (defun (setf host-find) (addr name) |
387 | "Make NAME map to ADDR (must be an ipaddr in integer form)." | |
388 | (setf (gethash (string-downcase (stringify name)) *hosts*) addr)) | |
fe5fb85a | 389 | |
7e282fb5 | 390 | (defun host-create (name addr) |
391 | "Make host NAME map to ADDR (anything acceptable to parse-ipaddr)." | |
392 | (setf (host-find name) (parse-ipaddr addr))) | |
fe5fb85a | 393 | |
7e282fb5 | 394 | (defmacro defhost (name addr) |
395 | "Main host definition macro. Neither NAME nor ADDR is evaluated." | |
396 | `(progn | |
397 | (host-create ',name ',addr) | |
398 | ',name)) | |
399 | ||
fe5fb85a MW |
400 | ;;;-------------------------------------------------------------------------- |
401 | ;;; Network names and specifiers. | |
402 | ||
7e282fb5 | 403 | (defstruct (net (:predicate netp)) |
404 | "A network structure. Slots: | |
405 | ||
406 | NAME The network's name, as a string | |
407 | IPNET The network base address and mask | |
408 | HOSTS Number of hosts in the network | |
409 | NEXT Index of the next unassigned host" | |
410 | name | |
411 | ipnet | |
412 | hosts | |
413 | next) | |
414 | ||
415 | (defvar *networks* (make-hash-table :test #'equal) | |
416 | "The table of known networks.") | |
fe5fb85a | 417 | |
7e282fb5 | 418 | (defun net-find (name) |
419 | "Find a network by NAME." | |
420 | (gethash (string-downcase (stringify name)) *networks*)) | |
fe5fb85a | 421 | |
7e282fb5 | 422 | (defun (setf net-find) (net name) |
423 | "Make NAME map to NET." | |
424 | (setf (gethash (string-downcase (stringify name)) *networks*) net)) | |
fe5fb85a | 425 | |
7e282fb5 | 426 | (defun net-get-as-ipnet (form) |
427 | "Transform FORM into an ipnet. FORM may be a network name, or something | |
428 | acceptable to the ipnet function." | |
429 | (let ((net (net-find form))) | |
430 | (if net (net-ipnet net) | |
431 | (ipnet form)))) | |
fe5fb85a | 432 | |
b90cef0d MW |
433 | (defun process-net-form (root addr subnets) |
434 | "Unpack a net-form. The return value is a list of entries, each of which | |
435 | is a list of the form (NAME ADDR MASK). The first entry is merely repeats | |
436 | the given ROOT and ADDR arguments (unpacking ADDR into separate network | |
437 | address and mask). The SUBNETS are then processed: they are a list of items | |
438 | of the form (NAME NUM-HOSTS . SUBNETS), where NAME names the subnet, | |
439 | NUM-HOSTS is the number of hosts in it, and SUBNETS are its sub-subnets in | |
440 | the same form. An error is signalled if a net's subnets use up more hosts | |
441 | than the net has to start with." | |
442 | (labels ((frob (subnets limit finger) | |
443 | (when subnets | |
444 | (destructuring-bind (name size &rest subs) (car subnets) | |
445 | (when (> (count-low-zero-bits size) | |
446 | (count-low-zero-bits finger)) | |
447 | (error "Bad subnet size for ~A." name)) | |
448 | (when (> (+ finger size) limit) | |
449 | (error "Subnet ~A out of range." name)) | |
450 | (append (and name | |
451 | (list (list name finger (- (ash 1 32) size)))) | |
452 | (frob subs (+ finger size) finger) | |
453 | (frob (cdr subnets) limit (+ finger size))))))) | |
454 | (let ((ipn (ipnet addr))) | |
455 | (with-ipnet (net mask) ipn | |
456 | (unless (ipmask-cidl-slash mask) | |
457 | (error "Bad mask for subnet form.")) | |
458 | (cons (list root net mask) | |
459 | (frob subnets (+ net (ipnet-hosts ipn) 1) net)))))) | |
460 | ||
461 | (defun net-create (name net) | |
7e282fb5 | 462 | "Construct a new network called NAME and add it to the map. The ARGS |
463 | describe the new network, in a form acceptable to the ipnet function." | |
b90cef0d | 464 | (let ((ipn (ipnet net))) |
7e282fb5 | 465 | (setf (net-find name) |
466 | (make-net :name (string-downcase (stringify name)) | |
467 | :ipnet ipn | |
468 | :hosts (ipnet-hosts ipn) | |
469 | :next 1)))) | |
fe5fb85a | 470 | |
b90cef0d MW |
471 | (defmacro defnet (name net &rest subnets) |
472 | "Main network definition macro. None of the arguments is evaluated." | |
7e282fb5 | 473 | `(progn |
b90cef0d MW |
474 | ,@(loop for (name addr mask) in (process-net-form name net subnets) |
475 | collect `(net-create ',name '(,addr . ,mask))) | |
476 | ',name)) | |
fe5fb85a | 477 | |
7e282fb5 | 478 | (defun net-next-host (net) |
479 | "Given a NET, return the IP address (as integer) of the next available | |
480 | address in the network." | |
481 | (unless (< (net-next net) (net-hosts net)) | |
482 | (error "No more hosts left in network ~A" (net-name net))) | |
483 | (let ((next (net-next net))) | |
484 | (incf (net-next net)) | |
485 | (net-host net next))) | |
fe5fb85a | 486 | |
7e282fb5 | 487 | (defun net-host (net host) |
488 | "Return the given HOST on the NEXT. HOST may be an index (in range, of | |
489 | course), or one of the keywords: | |
490 | :NEXT next host, as by net-next-host | |
491 | :NET network base address | |
492 | :BROADCAST network broadcast address" | |
493 | (case host | |
494 | (:next (net-next-host net)) | |
495 | (:net (ipnet-net (net-ipnet net))) | |
496 | (:broadcast (ipnet-broadcast (net-ipnet net))) | |
497 | (t (ipnet-host (net-ipnet net) host)))) | |
498 | ||
fe5fb85a MW |
499 | ;;;-------------------------------------------------------------------------- |
500 | ;;; Zone types. | |
7e282fb5 | 501 | |
502 | (defstruct (soa (:predicate soap)) | |
503 | "Start-of-authority record information." | |
504 | source | |
505 | admin | |
506 | refresh | |
507 | retry | |
508 | expire | |
509 | min-ttl | |
510 | serial) | |
fe5fb85a | 511 | |
7e282fb5 | 512 | (defstruct (mx (:predicate mxp)) |
513 | "Mail-exchange record information." | |
514 | priority | |
515 | domain) | |
fe5fb85a | 516 | |
7e282fb5 | 517 | (defstruct (zone (:predicate zonep)) |
518 | "Zone information." | |
519 | soa | |
520 | default-ttl | |
521 | name | |
522 | records) | |
523 | ||
fe5fb85a MW |
524 | ;;;-------------------------------------------------------------------------- |
525 | ;;; Zone defaults. It is intended that scripts override these. | |
526 | ||
7e282fb5 | 527 | (defvar *default-zone-source* |
528 | (let ((hn (unix:unix-gethostname))) | |
8a4f9a18 | 529 | (and hn (concatenate 'string (canonify-hostname hn) "."))) |
7e282fb5 | 530 | "The default zone source: the current host's name.") |
fe5fb85a | 531 | |
7e282fb5 | 532 | (defvar *default-zone-refresh* (* 24 60 60) |
533 | "Default zone refresh interval: one day.") | |
fe5fb85a | 534 | |
7e282fb5 | 535 | (defvar *default-zone-admin* nil |
536 | "Default zone administrator's email address.") | |
fe5fb85a | 537 | |
7e282fb5 | 538 | (defvar *default-zone-retry* (* 60 60) |
539 | "Default znoe retry interval: one hour.") | |
fe5fb85a | 540 | |
7e282fb5 | 541 | (defvar *default-zone-expire* (* 14 24 60 60) |
542 | "Default zone expiry time: two weeks.") | |
fe5fb85a | 543 | |
7e282fb5 | 544 | (defvar *default-zone-min-ttl* (* 4 60 60) |
545 | "Default zone minimum TTL/negative TTL: four hours.") | |
fe5fb85a | 546 | |
7e282fb5 | 547 | (defvar *default-zone-ttl* (* 8 60 60) |
548 | "Default zone TTL (for records without explicit TTLs): 8 hours.") | |
fe5fb85a | 549 | |
7e282fb5 | 550 | (defvar *default-mx-priority* 50 |
551 | "Default MX priority.") | |
552 | ||
fe5fb85a MW |
553 | ;;;-------------------------------------------------------------------------- |
554 | ;;; Serial numbering. | |
7e282fb5 | 555 | |
556 | (defun make-zone-serial (name) | |
557 | "Given a zone NAME, come up with a new serial number. This will (very | |
558 | carefully) update a file ZONE.serial in the current directory." | |
559 | (let* ((file (format nil "~(~A~).serial" name)) | |
560 | (last (with-open-file (in file | |
561 | :direction :input | |
562 | :if-does-not-exist nil) | |
563 | (if in (read in) | |
564 | (list 0 0 0 0)))) | |
565 | (now (multiple-value-bind | |
566 | (sec min hr dy mon yr dow dstp tz) | |
567 | (get-decoded-time) | |
568 | (declare (ignore sec min hr dow dstp tz)) | |
569 | (list dy mon yr))) | |
570 | (seq (cond ((not (equal now (cdr last))) 0) | |
571 | ((< (car last) 99) (1+ (car last))) | |
572 | (t (error "Run out of sequence numbers for ~A" name))))) | |
573 | (safely-writing (out file) | |
574 | (format out | |
575 | ";; Serial number file for zone ~A~%~ | |
576 | ;; (LAST-SEQ DAY MONTH YEAR)~%~ | |
577 | ~S~%" | |
578 | name | |
579 | (cons seq now))) | |
580 | (from-mixed-base '(100 100 100) (reverse (cons seq now))))) | |
581 | ||
fe5fb85a MW |
582 | ;;;-------------------------------------------------------------------------- |
583 | ;;; Zone variables and structures. | |
584 | ||
7e282fb5 | 585 | (defvar *zones* (make-hash-table :test #'equal) |
586 | "Map of known zones.") | |
fe5fb85a | 587 | |
7e282fb5 | 588 | (defun zone-find (name) |
589 | "Find a zone given its NAME." | |
590 | (gethash (string-downcase (stringify name)) *zones*)) | |
fe5fb85a | 591 | |
7e282fb5 | 592 | (defun (setf zone-find) (zone name) |
593 | "Make the zone NAME map to ZONE." | |
594 | (setf (gethash (string-downcase (stringify name)) *zones*) zone)) | |
595 | ||
596 | (defstruct (zone-record (:conc-name zr-)) | |
597 | "A zone record." | |
598 | (name '<unnamed>) | |
599 | ttl | |
600 | type | |
601 | (defsubp nil) | |
602 | data) | |
603 | ||
604 | (defstruct (zone-subdomain (:conc-name zs-)) | |
605 | "A subdomain. Slightly weird. Used internally by zone-process-records | |
606 | below, and shouldn't escape." | |
607 | name | |
608 | ttl | |
609 | records) | |
610 | ||
fe5fb85a MW |
611 | ;;;-------------------------------------------------------------------------- |
612 | ;;; Zone infrastructure. | |
613 | ||
7e282fb5 | 614 | (defun zone-process-records (rec ttl func) |
615 | "Sort out the list of records in REC, calling FUNC for each one. TTL is | |
616 | the default time-to-live for records which don't specify one." | |
617 | (labels ((sift (rec ttl) | |
618 | (collecting (top sub) | |
619 | (loop | |
620 | (unless rec | |
621 | (return)) | |
622 | (let ((r (pop rec))) | |
623 | (cond ((eq r :ttl) | |
624 | (setf ttl (pop rec))) | |
625 | ((symbolp r) | |
626 | (collect (make-zone-record :type r | |
627 | :ttl ttl | |
628 | :data (pop rec)) | |
629 | top)) | |
630 | ((listp r) | |
631 | (dolist (name (listify (car r))) | |
632 | (collect (make-zone-subdomain :name name | |
633 | :ttl ttl | |
634 | :records (cdr r)) | |
635 | sub))) | |
636 | (t | |
637 | (error "Unexpected record form ~A" (car r)))))))) | |
638 | (process (rec dom ttl defsubp) | |
639 | (multiple-value-bind (top sub) (sift rec ttl) | |
640 | (if (and dom (null top) sub) | |
641 | (let ((s (pop sub))) | |
642 | (process (zs-records s) | |
643 | dom | |
644 | (zs-ttl s) | |
645 | defsubp) | |
646 | (process (zs-records s) | |
647 | (cons (zs-name s) dom) | |
648 | (zs-ttl s) | |
649 | t)) | |
650 | (let ((name (and dom | |
651 | (string-downcase | |
652 | (join-strings #\. (reverse dom)))))) | |
653 | (dolist (zr top) | |
654 | (setf (zr-name zr) name) | |
655 | (setf (zr-defsubp zr) defsubp) | |
656 | (funcall func zr)))) | |
657 | (dolist (s sub) | |
658 | (process (zs-records s) | |
659 | (cons (zs-name s) dom) | |
660 | (zs-ttl s) | |
661 | defsubp))))) | |
662 | (process rec nil ttl nil))) | |
663 | ||
664 | (defun zone-parse-host (f zname) | |
665 | "Parse a host name F: if F ends in a dot then it's considered absolute; | |
666 | otherwise it's relative to ZNAME." | |
667 | (setf f (stringify f)) | |
668 | (cond ((string= f "@") (stringify zname)) | |
669 | ((and (plusp (length f)) | |
670 | (char= (char f (1- (length f))) #\.)) | |
671 | (string-downcase (subseq f 0 (1- (length f))))) | |
672 | (t (string-downcase (concatenate 'string f "." | |
673 | (stringify zname)))))) | |
7e282fb5 | 674 | (defun default-rev-zone (base bytes) |
fe5fb85a MW |
675 | "Return the default reverse-zone name for the given BASE address and number |
676 | of fixed leading BYTES." | |
7e282fb5 | 677 | (join-strings #\. (collecting () |
678 | (loop for i from (- 3 bytes) downto 0 | |
679 | do (collect (ipaddr-byte base i))) | |
680 | (collect "in-addr.arpa")))) | |
681 | ||
682 | (defun zone-name-from-net (net &optional bytes) | |
683 | "Given a NET, and maybe the BYTES to use, convert to the appropriate | |
684 | subdomain of in-addr.arpa." | |
685 | (let ((ipn (net-get-as-ipnet net))) | |
686 | (with-ipnet (net mask) ipn | |
687 | (unless bytes | |
688 | (setf bytes (- 4 (ipnet-changeable-bytes mask)))) | |
689 | (join-strings #\. | |
690 | (append (loop | |
691 | for i from (- 4 bytes) below 4 | |
692 | collect (logand #xff (ash net (* -8 i)))) | |
693 | (list "in-addr.arpa")))))) | |
fe5fb85a | 694 | |
7e282fb5 | 695 | (defun zone-net-from-name (name) |
696 | "Given a NAME in the in-addr.arpa space, convert it to an ipnet." | |
697 | (let* ((name (string-downcase (stringify name))) | |
698 | (len (length name)) | |
699 | (suffix ".in-addr.arpa") | |
700 | (sufflen (length suffix)) | |
701 | (addr 0) | |
702 | (n 0) | |
703 | (end (- len sufflen))) | |
704 | (unless (and (> len sufflen) | |
705 | (string= name suffix :start1 end)) | |
706 | (error "`~A' not in ~A." name suffix)) | |
707 | (loop | |
708 | with start = 0 | |
709 | for dot = (position #\. name :start start :end end) | |
710 | for byte = (parse-integer name | |
711 | :start start | |
712 | :end (or dot end)) | |
713 | do (setf addr (logior addr (ash byte (* 8 n)))) | |
714 | (incf n) | |
715 | when (>= n 4) | |
716 | do (error "Can't deduce network from ~A." name) | |
717 | while dot | |
718 | do (setf start (1+ dot))) | |
719 | (setf addr (ash addr (* 8 (- 4 n)))) | |
720 | (make-ipnet addr (* 8 n)))) | |
721 | ||
722 | (defun zone-reverse-records (records net list bytes dom) | |
723 | "Construct a reverse zone given a forward zone's RECORDS list, the NET that | |
724 | the reverse zone is to serve, a LIST to collect the records into, how | |
725 | many BYTES of data need to end up in the zone, and the DOM-ain suffix." | |
726 | (dolist (zr records) | |
727 | (when (and (eq (zr-type zr) :a) | |
728 | (not (zr-defsubp zr)) | |
729 | (ipaddr-networkp (zr-data zr) net)) | |
730 | (collect (make-zone-record | |
731 | :name (string-downcase | |
732 | (join-strings | |
733 | #\. | |
734 | (collecting () | |
735 | (dotimes (i bytes) | |
736 | (collect (logand #xff (ash (zr-data zr) | |
737 | (* -8 i))))) | |
738 | (collect dom)))) | |
739 | :type :ptr | |
740 | :ttl (zr-ttl zr) | |
741 | :data (zr-name zr)) | |
742 | list)))) | |
743 | ||
744 | (defun zone-reverse (data name list) | |
745 | "Process a :reverse record's DATA, for a domain called NAME, and add the | |
746 | records to the LIST." | |
747 | (destructuring-bind | |
748 | (net &key bytes zones) | |
749 | (listify data) | |
750 | (setf net (zone-parse-net net name)) | |
751 | (dolist (z (or (listify zones) | |
752 | (hash-table-keys *zones*))) | |
753 | (zone-reverse-records (zone-records (zone-find z)) | |
754 | net | |
755 | list | |
756 | (or bytes | |
757 | (ipnet-changeable-bytes (ipnet-mask net))) | |
758 | name)))) | |
759 | ||
760 | (defun zone-parse-net (net name) | |
761 | "Given a NET, and the NAME of a domain to guess from if NET is null, | |
762 | return the ipnet for the network." | |
763 | (if net | |
764 | (net-get-as-ipnet net) | |
765 | (zone-net-from-name name))) | |
766 | ||
767 | (defun zone-cidr-delg-default-name (ipn bytes) | |
768 | "Given a delegated net IPN and the parent's number of changing BYTES, | |
769 | return the default deletate zone prefix." | |
770 | (with-ipnet (net mask) ipn | |
771 | (join-strings #\. | |
772 | (reverse | |
773 | (loop | |
774 | for i from (1- bytes) downto 0 | |
775 | until (zerop (logand mask (ash #xff (* 8 i)))) | |
776 | collect (logand #xff (ash net (* -8 i)))))))) | |
777 | ||
778 | (defun zone-cidr-delegation (data name ttl list) | |
779 | "Given :cidr-delegation info DATA, for a record called NAME and the current | |
780 | TTL, write lots of CNAME records to LIST." | |
781 | (destructuring-bind | |
782 | (net &key bytes) | |
783 | (listify (car data)) | |
784 | (setf net (zone-parse-net net name)) | |
785 | (unless bytes | |
786 | (setf bytes (ipnet-changeable-bytes (ipnet-mask net)))) | |
787 | (dolist (map (cdr data)) | |
788 | (destructuring-bind | |
789 | (tnet &optional tdom) | |
790 | (listify map) | |
791 | (setf tnet (zone-parse-net tnet name)) | |
792 | (unless (ipnet-subnetp net tnet) | |
793 | (error "~A is not a subnet of ~A." | |
794 | (ipnet-pretty tnet) | |
795 | (ipnet-pretty net))) | |
796 | (unless tdom | |
797 | (setf tdom | |
798 | (join-strings #\. | |
799 | (list (zone-cidr-delg-default-name tnet bytes) | |
800 | name)))) | |
801 | (setf tdom (string-downcase tdom)) | |
802 | (dotimes (i (ipnet-hosts tnet)) | |
803 | (let* ((addr (ipnet-host tnet i)) | |
804 | (tail (join-strings #\. | |
805 | (loop | |
806 | for i from 0 below bytes | |
807 | collect | |
808 | (logand #xff | |
809 | (ash addr (* 8 i))))))) | |
810 | (collect (make-zone-record | |
811 | :name (join-strings #\. | |
812 | (list tail name)) | |
813 | :type :cname | |
814 | :ttl ttl | |
815 | :data (join-strings #\. (list tail tdom))) | |
816 | list))))))) | |
817 | ||
fe5fb85a MW |
818 | ;;;-------------------------------------------------------------------------- |
819 | ;;; Zone form parsing. | |
7e282fb5 | 820 | |
821 | (defun zone-parse-head (head) | |
822 | "Parse the HEAD of a zone form. This has the form | |
823 | ||
824 | (NAME &key :source :admin :refresh :retry | |
825 | :expire :min-ttl :ttl :serial) | |
826 | ||
827 | though a singleton NAME needn't be a list. Returns the default TTL and an | |
828 | soa structure representing the zone head." | |
829 | (destructuring-bind | |
830 | (zname | |
831 | &key | |
8a4f9a18 | 832 | (source *default-zone-source*) |
7e282fb5 | 833 | (admin (or *default-zone-admin* |
834 | (format nil "hostmaster@~A" zname))) | |
835 | (refresh *default-zone-refresh*) | |
836 | (retry *default-zone-retry*) | |
837 | (expire *default-zone-expire*) | |
838 | (min-ttl *default-zone-min-ttl*) | |
839 | (ttl min-ttl) | |
840 | (serial (make-zone-serial zname))) | |
841 | (listify head) | |
842 | (values zname | |
843 | (timespec-seconds ttl) | |
844 | (make-soa :admin admin | |
845 | :source (zone-parse-host source zname) | |
846 | :refresh (timespec-seconds refresh) | |
847 | :retry (timespec-seconds retry) | |
848 | :expire (timespec-seconds expire) | |
849 | :min-ttl (timespec-seconds min-ttl) | |
850 | :serial serial)))) | |
851 | ||
7e282fb5 | 852 | (defmacro defzoneparse (types (name data list |
853 | &key (zname (gensym "ZNAME")) | |
854 | (ttl (gensym "TTL")) | |
855 | (defsubp (gensym "DEFSUBP"))) | |
856 | &body body) | |
fe5fb85a MW |
857 | "Define a new zone record type (or TYPES -- a list of synonyms is |
858 | permitted). The arguments are as follows: | |
859 | ||
860 | NAME The name of the record to be added. | |
861 | ||
862 | DATA The content of the record to be added (a single object, unevaluated). | |
863 | ||
864 | LIST A function to add a record to the zone. See below. | |
865 | ||
866 | ZNAME The name of the zone being constructed. | |
867 | ||
868 | TTL The TTL for this record. | |
869 | ||
870 | DEFSUBP Whether this is the default subdomain for this entry. | |
871 | ||
872 | You get to choose your own names for these. ZNAME, TTL and DEFSUBP are | |
873 | optional: you don't have to accept them if you're not interested. | |
874 | ||
875 | The LIST argument names a function to be bound in the body to add a new | |
876 | low-level record to the zone. It has the prototype | |
877 | ||
878 | (LIST &key :name :type :data :ttl :defsubp) | |
879 | ||
880 | Except for defsubp, these default to the above arguments (even if you didn't | |
881 | accept the arguments)." | |
7e282fb5 | 882 | (setf types (listify types)) |
883 | (let* ((type (car types)) | |
884 | (func (intern (format nil "ZONE-PARSE/~:@(~A~)" type)))) | |
885 | (with-gensyms (col tname ttype tttl tdata tdefsubp i) | |
886 | `(progn | |
887 | (dolist (,i ',types) | |
888 | (setf (get ,i 'zone-parse) ',func)) | |
889 | (defun ,func (,name ,data ,ttl ,col ,zname ,defsubp) | |
890 | (declare (ignorable ,zname ,defsubp)) | |
891 | (flet ((,list (&key ((:name ,tname) ,name) | |
892 | ((:type ,ttype) ,type) | |
893 | ((:data ,tdata) ,data) | |
894 | ((:ttl ,tttl) ,ttl) | |
895 | ((:defsubp ,tdefsubp) nil)) | |
896 | (collect (make-zone-record :name ,tname | |
897 | :type ,ttype | |
898 | :data ,tdata | |
899 | :ttl ,tttl | |
900 | :defsubp ,tdefsubp) | |
901 | ,col))) | |
902 | ,@body)) | |
903 | ',type)))) | |
904 | ||
905 | (defun zone-parse-records (zone records) | |
906 | (let ((zname (zone-name zone))) | |
907 | (with-collection (rec) | |
908 | (flet ((parse-record (zr) | |
909 | (let ((func (or (get (zr-type zr) 'zone-parse) | |
910 | (error "No parser for record ~A." | |
911 | (zr-type zr)))) | |
912 | (name (and (zr-name zr) | |
913 | (stringify (zr-name zr))))) | |
914 | (if (or (not name) | |
915 | (string= name "@")) | |
916 | (setf name zname) | |
917 | (let ((len (length name))) | |
918 | (if (or (zerop len) | |
919 | (char/= (char name (1- len)) #\.)) | |
920 | (setf name (join-strings #\. | |
921 | (list name zname)))))) | |
922 | (funcall func | |
923 | name | |
924 | (zr-data zr) | |
925 | (zr-ttl zr) | |
926 | rec | |
927 | zname | |
928 | (zr-defsubp zr))))) | |
929 | (zone-process-records records | |
930 | (zone-default-ttl zone) | |
931 | #'parse-record )) | |
932 | (setf (zone-records zone) (nconc (zone-records zone) rec))))) | |
933 | ||
934 | (defun zone-parse (zf) | |
935 | "Parse a ZONE form. The syntax of a zone form is as follows: | |
936 | ||
937 | ZONE-FORM: | |
938 | ZONE-HEAD ZONE-RECORD* | |
939 | ||
940 | ZONE-RECORD: | |
941 | ((NAME*) ZONE-RECORD*) | |
942 | | SYM ARGS" | |
943 | (multiple-value-bind (zname ttl soa) (zone-parse-head (car zf)) | |
944 | (let ((zone (make-zone :name zname | |
945 | :default-ttl ttl | |
946 | :soa soa | |
947 | :records nil))) | |
948 | (zone-parse-records zone (cdr zf)) | |
949 | zone))) | |
950 | ||
fe5fb85a MW |
951 | (defun zone-create (zf) |
952 | "Zone construction function. Given a zone form ZF, construct the zone and | |
953 | add it to the table." | |
954 | (let* ((zone (zone-parse zf)) | |
955 | (name (zone-name zone))) | |
956 | (setf (zone-find name) zone) | |
957 | name)) | |
958 | ||
959 | (defmacro defzone (soa &rest zf) | |
960 | "Zone definition macro." | |
961 | `(zone-create '(,soa ,@zf))) | |
962 | ||
963 | (defmacro defrevzone (head &rest zf) | |
964 | "Define a reverse zone, with the correct name." | |
965 | (destructuring-bind | |
966 | (net &rest soa-args) | |
967 | (listify head) | |
968 | (let ((bytes nil)) | |
969 | (when (and soa-args (integerp (car soa-args))) | |
970 | (setf bytes (pop soa-args))) | |
971 | `(zone-create '((,(zone-name-from-net net bytes) ,@soa-args) ,@zf))))) | |
972 | ||
973 | ;;;-------------------------------------------------------------------------- | |
974 | ;;; Zone record parsers. | |
975 | ||
7e282fb5 | 976 | (defzoneparse :a (name data rec :defsubp defsubp) |
977 | ":a IPADDR" | |
978 | (rec :data (parse-ipaddr data) :defsubp defsubp)) | |
fe5fb85a | 979 | |
7e282fb5 | 980 | (defzoneparse :ptr (name data rec :zname zname) |
981 | ":ptr HOST" | |
982 | (rec :data (zone-parse-host data zname))) | |
fe5fb85a | 983 | |
7e282fb5 | 984 | (defzoneparse :cname (name data rec :zname zname) |
985 | ":cname HOST" | |
986 | (rec :data (zone-parse-host data zname))) | |
fe5fb85a | 987 | |
7e282fb5 | 988 | (defzoneparse :mx (name data rec :zname zname) |
989 | ":mx ((HOST :prio INT :ip IPADDR)*)" | |
990 | (dolist (mx (listify data)) | |
991 | (destructuring-bind | |
992 | (mxname &key (prio *default-mx-priority*) ip) | |
993 | (listify mx) | |
994 | (let ((host (zone-parse-host mxname zname))) | |
995 | (when ip (rec :name host :type :a :data (parse-ipaddr ip))) | |
996 | (rec :data (cons host prio)))))) | |
fe5fb85a | 997 | |
7e282fb5 | 998 | (defzoneparse :ns (name data rec :zname zname) |
999 | ":ns ((HOST :ip IPADDR)*)" | |
1000 | (dolist (ns (listify data)) | |
1001 | (destructuring-bind | |
1002 | (nsname &key ip) | |
1003 | (listify ns) | |
1004 | (let ((host (zone-parse-host nsname zname))) | |
1005 | (when ip (rec :name host :type :a :data (parse-ipaddr ip))) | |
1006 | (rec :data host))))) | |
fe5fb85a | 1007 | |
7e282fb5 | 1008 | (defzoneparse :alias (name data rec :zname zname) |
1009 | ":alias (LABEL*)" | |
1010 | (dolist (a (listify data)) | |
1011 | (rec :name (zone-parse-host a zname) | |
1012 | :type :cname | |
1013 | :data name))) | |
fe5fb85a | 1014 | |
a15288b4 | 1015 | (defzoneparse :net (name data rec) |
1016 | ":net (NETWORK*)" | |
1017 | (dolist (net (listify data)) | |
1018 | (let ((n (net-get-as-ipnet net))) | |
1019 | (rec :name (zone-parse-host "net" name) | |
1020 | :type :a | |
1021 | :data (ipnet-net n)) | |
1022 | (rec :name (zone-parse-host "mask" name) | |
1023 | :type :a | |
1024 | :data (ipnet-mask n)) | |
1025 | (rec :name (zone-parse-host "broadcast" name) | |
1026 | :type :a | |
1027 | :data (ipnet-broadcast n))))) | |
7e282fb5 | 1028 | |
1029 | (defzoneparse (:rev :reverse) (name data rec) | |
1030 | ":reverse ((NET :bytes BYTES) ZONE*)" | |
1031 | (setf data (listify data)) | |
1032 | (destructuring-bind | |
1033 | (net &key bytes) | |
1034 | (listify (car data)) | |
1035 | (setf net (zone-parse-net net name)) | |
1036 | (unless bytes | |
1037 | (setf bytes (ipnet-changeable-bytes (ipnet-mask net)))) | |
1038 | (dolist (z (or (cdr data) | |
1039 | (hash-table-keys *zones*))) | |
1040 | (dolist (zr (zone-records (zone-find z))) | |
1041 | (when (and (eq (zr-type zr) :a) | |
1042 | (not (zr-defsubp zr)) | |
1043 | (ipaddr-networkp (zr-data zr) net)) | |
1044 | (rec :name (string-downcase | |
1045 | (join-strings | |
1046 | #\. | |
1047 | (collecting () | |
1048 | (dotimes (i bytes) | |
1049 | (collect (logand #xff (ash (zr-data zr) | |
1050 | (* -8 i))))) | |
1051 | (collect name)))) | |
1052 | :type :ptr | |
1053 | :ttl (zr-ttl zr) | |
1054 | :data (zr-name zr))))))) | |
1055 | ||
1056 | (defzoneparse (:cidr-delegation :cidr) (name data rec) | |
1057 | ":cidr-delegation ((NET :bytes BYTES) (TARGET-NET [TARGET-ZONE])*)" | |
1058 | (destructuring-bind | |
1059 | (net &key bytes) | |
1060 | (listify (car data)) | |
1061 | (setf net (zone-parse-net net name)) | |
1062 | (unless bytes | |
1063 | (setf bytes (ipnet-changeable-bytes (ipnet-mask net)))) | |
1064 | (dolist (map (cdr data)) | |
1065 | (destructuring-bind | |
1066 | (tnet &optional tdom) | |
1067 | (listify map) | |
1068 | (setf tnet (zone-parse-net tnet name)) | |
1069 | (unless (ipnet-subnetp net tnet) | |
1070 | (error "~A is not a subnet of ~A." | |
1071 | (ipnet-pretty tnet) | |
1072 | (ipnet-pretty net))) | |
1073 | (unless tdom | |
1074 | (with-ipnet (net mask) tnet | |
1075 | (setf tdom | |
1076 | (join-strings | |
1077 | #\. | |
1078 | (append (reverse (loop | |
1079 | for i from (1- bytes) downto 0 | |
1080 | until (zerop (logand mask | |
1081 | (ash #xff | |
1082 | (* 8 i)))) | |
1083 | collect (logand #xff | |
1084 | (ash net (* -8 i))))) | |
1085 | (list name)))))) | |
1086 | (setf tdom (string-downcase tdom)) | |
1087 | (dotimes (i (ipnet-hosts tnet)) | |
1088 | (let* ((addr (ipnet-host tnet i)) | |
1089 | (tail (join-strings #\. | |
1090 | (loop | |
1091 | for i from 0 below bytes | |
1092 | collect | |
1093 | (logand #xff | |
1094 | (ash addr (* 8 i))))))) | |
1095 | (rec :name (format nil "~A.~A" tail name) | |
1096 | :type :cname | |
1097 | :data (format nil "~A.~A" tail tdom)))))))) | |
1098 | ||
fe5fb85a MW |
1099 | ;;;-------------------------------------------------------------------------- |
1100 | ;;; Zone file output. | |
7e282fb5 | 1101 | |
1102 | (defun zone-write (zone &optional (stream *standard-output*)) | |
1103 | "Write a ZONE's records to STREAM." | |
1104 | (labels ((fix-admin (a) | |
1105 | (let ((at (position #\@ a)) | |
1106 | (s (concatenate 'string (string-downcase a) "."))) | |
1107 | (when s | |
1108 | (setf (char s at) #\.)) | |
1109 | s)) | |
1110 | (fix-host (h) | |
1111 | (if (not h) | |
1112 | "@" | |
1113 | (let* ((h (string-downcase (stringify h))) | |
1114 | (hl (length h)) | |
1115 | (r (string-downcase (zone-name zone))) | |
1116 | (rl (length r))) | |
1117 | (cond ((string= r h) "@") | |
1118 | ((and (> hl rl) | |
1119 | (char= (char h (- hl rl 1)) #\.) | |
1120 | (string= h r :start1 (- hl rl))) | |
1121 | (subseq h 0 (- hl rl 1))) | |
1122 | (t (concatenate 'string h ".")))))) | |
1123 | (printrec (zr) | |
1124 | (format stream "~A~20T~@[~8D~]~30TIN ~A~40T" | |
1125 | (fix-host (zr-name zr)) | |
1126 | (and (/= (zr-ttl zr) (zone-default-ttl zone)) | |
1127 | (zr-ttl zr)) | |
1128 | (string-upcase (symbol-name (zr-type zr)))))) | |
1129 | (format stream "~ | |
1130 | ;;; Zone file `~(~A~)' | |
1131 | ;;; (generated ~A) | |
1132 | ||
1133 | $ORIGIN ~@0*~(~A.~) | |
1134 | $TTL ~@2*~D~2%" | |
1135 | (zone-name zone) | |
1136 | (iso-date :now :datep t :timep t) | |
1137 | (zone-default-ttl zone)) | |
1138 | (let ((soa (zone-soa zone))) | |
1139 | (format stream "~ | |
1140 | ~A~30TIN SOA~40T~A ~A ( | |
1141 | ~45T~10D~60T ;serial | |
1142 | ~45T~10D~60T ;refresh | |
1143 | ~45T~10D~60T ;retry | |
1144 | ~45T~10D~60T ;expire | |
1145 | ~45T~10D )~60T ;min-ttl~2%" | |
1146 | (fix-host (zone-name zone)) | |
1147 | (fix-host (soa-source soa)) | |
1148 | (fix-admin (soa-admin soa)) | |
1149 | (soa-serial soa) | |
1150 | (soa-refresh soa) | |
1151 | (soa-retry soa) | |
1152 | (soa-expire soa) | |
1153 | (soa-min-ttl soa))) | |
1154 | (dolist (zr (zone-records zone)) | |
1155 | (case (zr-type zr) | |
1156 | (:a | |
1157 | (printrec zr) | |
1158 | (format stream "~A~%" (ipaddr-string (zr-data zr)))) | |
1159 | ((:ptr :cname) | |
1160 | (printrec zr) | |
1161 | (format stream "~A~%" (fix-host (zr-data zr)))) | |
1162 | (:ns | |
1163 | (printrec zr) | |
1164 | (format stream "~A~%" (fix-host (zr-data zr)))) | |
1165 | (:mx | |
1166 | (printrec zr) | |
1167 | (let ((mx (zr-data zr))) | |
1168 | (format stream "~2D ~A~%" (cdr mx) (fix-host (car mx))))) | |
1169 | (:txt | |
1170 | (printrec zr) | |
1171 | (format stream "~S~%" (stringify (zr-data zr)))))))) | |
1172 | ||
7e282fb5 | 1173 | (defun zone-save (zones) |
1174 | "Write the named ZONES to files. If no zones are given, write all the | |
1175 | zones." | |
1176 | (unless zones | |
1177 | (setf zones (hash-table-keys *zones*))) | |
1178 | (safely (safe) | |
1179 | (dolist (z zones) | |
1180 | (let ((zz (zone-find z))) | |
1181 | (unless zz | |
1182 | (error "Unknown zone `~A'." z)) | |
1183 | (let ((stream (safely-open-output-stream safe | |
1c472e03 MW |
1184 | (format nil |
1185 | "~(~A~).zone" | |
1186 | z)))) | |
7e282fb5 | 1187 | (zone-write zz stream)))))) |
1188 | ||
1189 | ;;;----- That's all, folks -------------------------------------------------- |