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7e282fb5 | 1 | ;;; -*-lisp-*- |
2 | ;;; | |
7e282fb5 | 3 | ;;; DNS zone generation |
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. | |
7fff3797 | 14 | ;;; |
7e282fb5 | 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. | |
7fff3797 | 19 | ;;; |
7e282fb5 | 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 | ||
fe5fb85a MW |
24 | ;;;-------------------------------------------------------------------------- |
25 | ;;; Packaging. | |
26 | ||
7e282fb5 | 27 | (defpackage #:zone |
716105aa MW |
28 | (:use #:common-lisp |
29 | #:mdw.base #:mdw.str #:collect #:safely | |
afa2e2f1 | 30 | #:net #:services)) |
fe5fb85a | 31 | |
7e282fb5 | 32 | (in-package #:zone) |
33 | ||
fe5fb85a | 34 | ;;;-------------------------------------------------------------------------- |
fe5fb85a MW |
35 | ;;; Various random utilities. |
36 | ||
37 | (defun to-integer (x) | |
38 | "Convert X to an integer in the most straightforward way." | |
39 | (floor (rational x))) | |
40 | ||
41 | (defun from-mixed-base (base val) | |
42 | "BASE is a list of the ranges for the `digits' of a mixed-base | |
2f1d381d | 43 | representation. Convert VAL, a list of digits, into an integer." |
fe5fb85a MW |
44 | (do ((base base (cdr base)) |
45 | (val (cdr val) (cdr val)) | |
46 | (a (car val) (+ (* a (car base)) (car val)))) | |
47 | ((or (null base) (null val)) a))) | |
48 | ||
49 | (defun to-mixed-base (base val) | |
50 | "BASE is a list of the ranges for the `digits' of a mixed-base | |
2f1d381d | 51 | representation. Convert VAL, an integer, into a list of digits." |
fe5fb85a MW |
52 | (let ((base (reverse base)) |
53 | (a nil)) | |
54 | (loop | |
55 | (unless base | |
56 | (push val a) | |
57 | (return a)) | |
58 | (multiple-value-bind (q r) (floor val (pop base)) | |
59 | (push r a) | |
60 | (setf val q))))) | |
61 | ||
afa2e2f1 | 62 | (export 'timespec-seconds) |
fe5fb85a | 63 | (defun timespec-seconds (ts) |
f38bc59e MW |
64 | "Convert a timespec TS to seconds. |
65 | ||
66 | A timespec may be a real count of seconds, or a list (COUNT UNIT): UNIT | |
67 | may be any of a number of obvious time units." | |
fe5fb85a MW |
68 | (cond ((null ts) 0) |
69 | ((realp ts) (floor ts)) | |
70 | ((atom ts) | |
71 | (error "Unknown timespec format ~A" ts)) | |
72 | ((null (cdr ts)) | |
73 | (timespec-seconds (car ts))) | |
74 | (t (+ (to-integer (* (car ts) | |
75 | (case (intern (string-upcase | |
76 | (stringify (cadr ts))) | |
77 | '#:zone) | |
78 | ((s sec secs second seconds) 1) | |
79 | ((m min mins minute minutes) 60) | |
80 | ((h hr hrs hour hours) #.(* 60 60)) | |
81 | ((d dy dys day days) #.(* 24 60 60)) | |
82 | ((w wk wks week weeks) #.(* 7 24 60 60)) | |
83 | ((y yr yrs year years) #.(* 365 24 60 60)) | |
84 | (t (error "Unknown time unit ~A" | |
85 | (cadr ts)))))) | |
86 | (timespec-seconds (cddr ts)))))) | |
87 | ||
88 | (defun hash-table-keys (ht) | |
89 | "Return a list of the keys in hashtable HT." | |
90 | (collecting () | |
91 | (maphash (lambda (key val) (declare (ignore val)) (collect key)) ht))) | |
92 | ||
93 | (defun iso-date (&optional time &key datep timep (sep #\ )) | |
f38bc59e MW |
94 | "Construct a textual date or time in ISO format. |
95 | ||
96 | The TIME is the universal time to convert, which defaults to now; DATEP is | |
97 | whether to emit the date; TIMEP is whether to emit the time, and | |
98 | SEP (default is space) is how to separate the two." | |
fe5fb85a MW |
99 | (multiple-value-bind |
100 | (sec min hr day mon yr dow dstp tz) | |
101 | (decode-universal-time (if (or (null time) (eq time :now)) | |
102 | (get-universal-time) | |
103 | time)) | |
104 | (declare (ignore dow dstp tz)) | |
105 | (with-output-to-string (s) | |
106 | (when datep | |
107 | (format s "~4,'0D-~2,'0D-~2,'0D" yr mon day) | |
108 | (when timep | |
109 | (write-char sep s))) | |
110 | (when timep | |
111 | (format s "~2,'0D:~2,'0D:~2,'0D" hr min sec))))) | |
112 | ||
fe5fb85a MW |
113 | ;;;-------------------------------------------------------------------------- |
114 | ;;; Zone types. | |
7e282fb5 | 115 | |
afa2e2f1 | 116 | (export 'soa) |
7e282fb5 | 117 | (defstruct (soa (:predicate soap)) |
118 | "Start-of-authority record information." | |
119 | source | |
120 | admin | |
121 | refresh | |
122 | retry | |
123 | expire | |
124 | min-ttl | |
125 | serial) | |
fe5fb85a | 126 | |
afa2e2f1 | 127 | (export 'mx) |
7e282fb5 | 128 | (defstruct (mx (:predicate mxp)) |
129 | "Mail-exchange record information." | |
130 | priority | |
131 | domain) | |
fe5fb85a | 132 | |
afa2e2f1 | 133 | (export 'zone) |
7e282fb5 | 134 | (defstruct (zone (:predicate zonep)) |
135 | "Zone information." | |
136 | soa | |
137 | default-ttl | |
138 | name | |
139 | records) | |
140 | ||
fe5fb85a MW |
141 | ;;;-------------------------------------------------------------------------- |
142 | ;;; Zone defaults. It is intended that scripts override these. | |
143 | ||
afa2e2f1 | 144 | (export '*default-zone-source*) |
7e282fb5 | 145 | (defvar *default-zone-source* |
8e7c1366 | 146 | (let ((hn (gethostname))) |
8a4f9a18 | 147 | (and hn (concatenate 'string (canonify-hostname hn) "."))) |
7e282fb5 | 148 | "The default zone source: the current host's name.") |
fe5fb85a | 149 | |
afa2e2f1 | 150 | (export '*default-zone-refresh*) |
7e282fb5 | 151 | (defvar *default-zone-refresh* (* 24 60 60) |
152 | "Default zone refresh interval: one day.") | |
fe5fb85a | 153 | |
afa2e2f1 | 154 | (export '*default-zone-admin*) |
7e282fb5 | 155 | (defvar *default-zone-admin* nil |
156 | "Default zone administrator's email address.") | |
fe5fb85a | 157 | |
afa2e2f1 | 158 | (export '*default-zone-retry*) |
7e282fb5 | 159 | (defvar *default-zone-retry* (* 60 60) |
160 | "Default znoe retry interval: one hour.") | |
fe5fb85a | 161 | |
afa2e2f1 | 162 | (export '*default-zone-expire*) |
7e282fb5 | 163 | (defvar *default-zone-expire* (* 14 24 60 60) |
164 | "Default zone expiry time: two weeks.") | |
fe5fb85a | 165 | |
afa2e2f1 | 166 | (export '*default-zone-min-ttl*) |
7e282fb5 | 167 | (defvar *default-zone-min-ttl* (* 4 60 60) |
168 | "Default zone minimum TTL/negative TTL: four hours.") | |
fe5fb85a | 169 | |
afa2e2f1 | 170 | (export '*default-zone-ttl*) |
7e282fb5 | 171 | (defvar *default-zone-ttl* (* 8 60 60) |
172 | "Default zone TTL (for records without explicit TTLs): 8 hours.") | |
fe5fb85a | 173 | |
afa2e2f1 | 174 | (export '*default-mx-priority*) |
7e282fb5 | 175 | (defvar *default-mx-priority* 50 |
176 | "Default MX priority.") | |
177 | ||
fe5fb85a | 178 | ;;;-------------------------------------------------------------------------- |
fe5fb85a MW |
179 | ;;; Zone variables and structures. |
180 | ||
7e282fb5 | 181 | (defvar *zones* (make-hash-table :test #'equal) |
182 | "Map of known zones.") | |
fe5fb85a | 183 | |
afa2e2f1 | 184 | (export 'zone-find) |
7e282fb5 | 185 | (defun zone-find (name) |
186 | "Find a zone given its NAME." | |
187 | (gethash (string-downcase (stringify name)) *zones*)) | |
188 | (defun (setf zone-find) (zone name) | |
189 | "Make the zone NAME map to ZONE." | |
190 | (setf (gethash (string-downcase (stringify name)) *zones*) zone)) | |
191 | ||
afa2e2f1 | 192 | (export 'zone-record) |
7e282fb5 | 193 | (defstruct (zone-record (:conc-name zr-)) |
194 | "A zone record." | |
195 | (name '<unnamed>) | |
196 | ttl | |
197 | type | |
590ad961 | 198 | (make-ptr-p nil) |
7e282fb5 | 199 | data) |
200 | ||
afa2e2f1 | 201 | (export 'zone-subdomain) |
7e282fb5 | 202 | (defstruct (zone-subdomain (:conc-name zs-)) |
203 | "A subdomain. Slightly weird. Used internally by zone-process-records | |
2f1d381d | 204 | below, and shouldn't escape." |
7e282fb5 | 205 | name |
206 | ttl | |
207 | records) | |
208 | ||
afa2e2f1 | 209 | (export '*zone-output-path*) |
ab87c7bf MW |
210 | (defvar *zone-output-path* *default-pathname-defaults* |
211 | "Pathname defaults to merge into output files.") | |
212 | ||
afa2e2f1 | 213 | (export '*preferred-subnets*) |
8ce7eb9b MW |
214 | (defvar *preferred-subnets* nil |
215 | "Subnets to prefer when selecting defaults.") | |
216 | ||
fe5fb85a MW |
217 | ;;;-------------------------------------------------------------------------- |
218 | ;;; Zone infrastructure. | |
219 | ||
ab87c7bf MW |
220 | (defun zone-file-name (zone type) |
221 | "Choose a file name for a given ZONE and TYPE." | |
222 | (merge-pathnames (make-pathname :name (string-downcase zone) | |
223 | :type (string-downcase type)) | |
224 | *zone-output-path*)) | |
225 | ||
afa2e2f1 | 226 | (export 'zone-preferred-subnet-p) |
8ce7eb9b MW |
227 | (defun zone-preferred-subnet-p (name) |
228 | "Answer whether NAME (a string or symbol) names a preferred subnet." | |
229 | (member name *preferred-subnets* :test #'string-equal)) | |
230 | ||
afa2e2f1 | 231 | (export 'preferred-subnet-case) |
8bd2576e | 232 | (defmacro preferred-subnet-case (&body clauses) |
f38bc59e MW |
233 | "CLAUSES have the form (SUBNETS . FORMS). |
234 | ||
235 | Evaluate the first FORMS whose SUBNETS (a list or single symbol, not | |
236 | evaluated) are considered preferred by zone-preferred-subnet-p. If | |
237 | SUBNETS is the symbol t then the clause always matches." | |
8bd2576e MW |
238 | `(cond |
239 | ,@(mapcar (lambda (clause) | |
240 | (let ((subnets (car clause))) | |
241 | (cons (cond ((eq subnets t) | |
242 | t) | |
243 | ((listp subnets) | |
244 | `(or ,@(mapcar (lambda (subnet) | |
245 | `(zone-preferred-subnet-p | |
246 | ',subnet)) | |
247 | subnets))) | |
248 | (t | |
249 | `(zone-preferred-subnet-p ',subnets))) | |
250 | (cdr clause)))) | |
251 | clauses))) | |
252 | ||
7e282fb5 | 253 | (defun zone-process-records (rec ttl func) |
f38bc59e MW |
254 | "Sort out the list of records in REC, calling FUNC for each one. |
255 | ||
256 | TTL is the default time-to-live for records which don't specify one." | |
7e282fb5 | 257 | (labels ((sift (rec ttl) |
258 | (collecting (top sub) | |
259 | (loop | |
260 | (unless rec | |
261 | (return)) | |
262 | (let ((r (pop rec))) | |
263 | (cond ((eq r :ttl) | |
264 | (setf ttl (pop rec))) | |
265 | ((symbolp r) | |
266 | (collect (make-zone-record :type r | |
267 | :ttl ttl | |
268 | :data (pop rec)) | |
269 | top)) | |
270 | ((listp r) | |
271 | (dolist (name (listify (car r))) | |
272 | (collect (make-zone-subdomain :name name | |
273 | :ttl ttl | |
274 | :records (cdr r)) | |
275 | sub))) | |
276 | (t | |
277 | (error "Unexpected record form ~A" (car r)))))))) | |
4e7e3780 | 278 | (process (rec dom ttl) |
7e282fb5 | 279 | (multiple-value-bind (top sub) (sift rec ttl) |
280 | (if (and dom (null top) sub) | |
64e34a97 MW |
281 | (let ((preferred |
282 | (or (find-if (lambda (s) | |
283 | (some #'zone-preferred-subnet-p | |
284 | (listify (zs-name s)))) | |
285 | sub) | |
286 | (car sub)))) | |
8ce7eb9b MW |
287 | (when preferred |
288 | (process (zs-records preferred) | |
289 | dom | |
290 | (zs-ttl preferred)))) | |
291 | (let ((name (and dom | |
292 | (string-downcase | |
293 | (join-strings #\. (reverse dom)))))) | |
294 | (dolist (zr top) | |
295 | (setf (zr-name zr) name) | |
296 | (funcall func zr)))) | |
7e282fb5 | 297 | (dolist (s sub) |
298 | (process (zs-records s) | |
299 | (cons (zs-name s) dom) | |
4e7e3780 MW |
300 | (zs-ttl s)))))) |
301 | (process rec nil ttl))) | |
7e282fb5 | 302 | |
afa2e2f1 | 303 | (export 'zone-parse-host) |
7e282fb5 | 304 | (defun zone-parse-host (f zname) |
305 | "Parse a host name F: if F ends in a dot then it's considered absolute; | |
2f1d381d | 306 | otherwise it's relative to ZNAME." |
7e282fb5 | 307 | (setf f (stringify f)) |
308 | (cond ((string= f "@") (stringify zname)) | |
309 | ((and (plusp (length f)) | |
310 | (char= (char f (1- (length f))) #\.)) | |
311 | (string-downcase (subseq f 0 (1- (length f))))) | |
312 | (t (string-downcase (concatenate 'string f "." | |
313 | (stringify zname)))))) | |
7e282fb5 | 314 | (defun default-rev-zone (base bytes) |
fe5fb85a | 315 | "Return the default reverse-zone name for the given BASE address and number |
2f1d381d | 316 | of fixed leading BYTES." |
7e282fb5 | 317 | (join-strings #\. (collecting () |
318 | (loop for i from (- 3 bytes) downto 0 | |
319 | do (collect (ipaddr-byte base i))) | |
320 | (collect "in-addr.arpa")))) | |
321 | ||
322 | (defun zone-name-from-net (net &optional bytes) | |
323 | "Given a NET, and maybe the BYTES to use, convert to the appropriate | |
2f1d381d | 324 | subdomain of in-addr.arpa." |
7e282fb5 | 325 | (let ((ipn (net-get-as-ipnet net))) |
326 | (with-ipnet (net mask) ipn | |
327 | (unless bytes | |
328 | (setf bytes (- 4 (ipnet-changeable-bytes mask)))) | |
329 | (join-strings #\. | |
330 | (append (loop | |
331 | for i from (- 4 bytes) below 4 | |
332 | collect (logand #xff (ash net (* -8 i)))) | |
333 | (list "in-addr.arpa")))))) | |
fe5fb85a | 334 | |
7e282fb5 | 335 | (defun zone-net-from-name (name) |
336 | "Given a NAME in the in-addr.arpa space, convert it to an ipnet." | |
337 | (let* ((name (string-downcase (stringify name))) | |
338 | (len (length name)) | |
339 | (suffix ".in-addr.arpa") | |
340 | (sufflen (length suffix)) | |
341 | (addr 0) | |
342 | (n 0) | |
343 | (end (- len sufflen))) | |
344 | (unless (and (> len sufflen) | |
345 | (string= name suffix :start1 end)) | |
346 | (error "`~A' not in ~A." name suffix)) | |
347 | (loop | |
348 | with start = 0 | |
349 | for dot = (position #\. name :start start :end end) | |
350 | for byte = (parse-integer name | |
351 | :start start | |
352 | :end (or dot end)) | |
353 | do (setf addr (logior addr (ash byte (* 8 n)))) | |
354 | (incf n) | |
355 | when (>= n 4) | |
356 | do (error "Can't deduce network from ~A." name) | |
357 | while dot | |
358 | do (setf start (1+ dot))) | |
359 | (setf addr (ash addr (* 8 (- 4 n)))) | |
360 | (make-ipnet addr (* 8 n)))) | |
361 | ||
7e282fb5 | 362 | (defun zone-parse-net (net name) |
2f1d381d MW |
363 | "Given a NET, and the NAME of a domain to guess from if NET is null, return |
364 | the ipnet for the network." | |
7e282fb5 | 365 | (if net |
366 | (net-get-as-ipnet net) | |
367 | (zone-net-from-name name))) | |
368 | ||
369 | (defun zone-cidr-delg-default-name (ipn bytes) | |
370 | "Given a delegated net IPN and the parent's number of changing BYTES, | |
2f1d381d | 371 | return the default deletate zone prefix." |
7e282fb5 | 372 | (with-ipnet (net mask) ipn |
373 | (join-strings #\. | |
374 | (reverse | |
375 | (loop | |
376 | for i from (1- bytes) downto 0 | |
377 | until (zerop (logand mask (ash #xff (* 8 i)))) | |
378 | collect (logand #xff (ash net (* -8 i)))))))) | |
379 | ||
fe5fb85a | 380 | ;;;-------------------------------------------------------------------------- |
ab87c7bf MW |
381 | ;;; Serial numbering. |
382 | ||
afa2e2f1 | 383 | (export 'make-zone-serial) |
ab87c7bf | 384 | (defun make-zone-serial (name) |
f38bc59e MW |
385 | "Given a zone NAME, come up with a new serial number. |
386 | ||
387 | This will (very carefully) update a file ZONE.serial in the current | |
388 | directory." | |
ab87c7bf MW |
389 | (let* ((file (zone-file-name name :serial)) |
390 | (last (with-open-file (in file | |
391 | :direction :input | |
392 | :if-does-not-exist nil) | |
393 | (if in (read in) | |
394 | (list 0 0 0 0)))) | |
395 | (now (multiple-value-bind | |
396 | (sec min hr dy mon yr dow dstp tz) | |
397 | (get-decoded-time) | |
398 | (declare (ignore sec min hr dow dstp tz)) | |
399 | (list dy mon yr))) | |
400 | (seq (cond ((not (equal now (cdr last))) 0) | |
401 | ((< (car last) 99) (1+ (car last))) | |
402 | (t (error "Run out of sequence numbers for ~A" name))))) | |
403 | (safely-writing (out file) | |
404 | (format out | |
405 | ";; Serial number file for zone ~A~%~ | |
b23c65ee MW |
406 | ;; (LAST-SEQ DAY MONTH YEAR)~%~ |
407 | ~S~%" | |
ab87c7bf MW |
408 | name |
409 | (cons seq now))) | |
410 | (from-mixed-base '(100 100 100) (reverse (cons seq now))))) | |
411 | ||
412 | ;;;-------------------------------------------------------------------------- | |
fe5fb85a | 413 | ;;; Zone form parsing. |
7e282fb5 | 414 | |
415 | (defun zone-parse-head (head) | |
f38bc59e MW |
416 | "Parse the HEAD of a zone form. |
417 | ||
418 | This has the form | |
7e282fb5 | 419 | |
420 | (NAME &key :source :admin :refresh :retry | |
b23c65ee | 421 | :expire :min-ttl :ttl :serial) |
7e282fb5 | 422 | |
2f1d381d MW |
423 | though a singleton NAME needn't be a list. Returns the default TTL and an |
424 | soa structure representing the zone head." | |
7e282fb5 | 425 | (destructuring-bind |
426 | (zname | |
427 | &key | |
8a4f9a18 | 428 | (source *default-zone-source*) |
7e282fb5 | 429 | (admin (or *default-zone-admin* |
430 | (format nil "hostmaster@~A" zname))) | |
431 | (refresh *default-zone-refresh*) | |
432 | (retry *default-zone-retry*) | |
433 | (expire *default-zone-expire*) | |
434 | (min-ttl *default-zone-min-ttl*) | |
435 | (ttl min-ttl) | |
436 | (serial (make-zone-serial zname))) | |
437 | (listify head) | |
438 | (values zname | |
439 | (timespec-seconds ttl) | |
440 | (make-soa :admin admin | |
441 | :source (zone-parse-host source zname) | |
442 | :refresh (timespec-seconds refresh) | |
443 | :retry (timespec-seconds retry) | |
444 | :expire (timespec-seconds expire) | |
445 | :min-ttl (timespec-seconds min-ttl) | |
446 | :serial serial)))) | |
447 | ||
afa2e2f1 | 448 | (export 'zone-make-name) |
5bf80328 MW |
449 | (defun zone-make-name (prefix zone-name) |
450 | (if (or (not prefix) (string= prefix "@")) | |
451 | zone-name | |
452 | (let ((len (length prefix))) | |
453 | (if (or (zerop len) (char/= (char prefix (1- len)) #\.)) | |
454 | (join-strings #\. (list prefix zone-name)) | |
455 | prefix)))) | |
456 | ||
afa2e2f1 | 457 | (export 'defzoneparse) |
7e282fb5 | 458 | (defmacro defzoneparse (types (name data list |
5bf80328 | 459 | &key (prefix (gensym "PREFIX")) |
b23c65ee MW |
460 | (zname (gensym "ZNAME")) |
461 | (ttl (gensym "TTL"))) | |
7e282fb5 | 462 | &body body) |
f38bc59e MW |
463 | "Define a new zone record type. |
464 | ||
465 | The TYPES may be a list of synonyms. The other arguments are as follows: | |
fe5fb85a | 466 | |
2f1d381d | 467 | NAME The name of the record to be added. |
fe5fb85a | 468 | |
2f1d381d | 469 | DATA The content of the record to be added (a single object, |
7fff3797 | 470 | unevaluated). |
fe5fb85a | 471 | |
2f1d381d | 472 | LIST A function to add a record to the zone. See below. |
fe5fb85a | 473 | |
5bf80328 MW |
474 | PREFIX The prefix tag used in the original form. |
475 | ||
2f1d381d | 476 | ZNAME The name of the zone being constructed. |
fe5fb85a | 477 | |
2f1d381d | 478 | TTL The TTL for this record. |
fe5fb85a | 479 | |
5bf80328 MW |
480 | You get to choose your own names for these. ZNAME, PREFIX and TTL are |
481 | optional: you don't have to accept them if you're not interested. | |
fe5fb85a | 482 | |
2f1d381d MW |
483 | The LIST argument names a function to be bound in the body to add a new |
484 | low-level record to the zone. It has the prototype | |
fe5fb85a | 485 | |
590ad961 | 486 | (LIST &key :name :type :data :ttl :make-ptr-p) |
fe5fb85a | 487 | |
590ad961 MW |
488 | These (except MAKE-PTR-P, which defaults to nil) default to the above |
489 | arguments (even if you didn't accept the arguments)." | |
7e282fb5 | 490 | (setf types (listify types)) |
491 | (let* ((type (car types)) | |
492 | (func (intern (format nil "ZONE-PARSE/~:@(~A~)" type)))) | |
2ec279f5 | 493 | (with-parsed-body (body decls doc) body |
590ad961 | 494 | (with-gensyms (col tname ttype tttl tdata tmakeptrp i) |
40ded1b8 MW |
495 | `(progn |
496 | (dolist (,i ',types) | |
497 | (setf (get ,i 'zone-parse) ',func)) | |
5bf80328 | 498 | (defun ,func (,prefix ,zname ,data ,ttl ,col) |
40ded1b8 MW |
499 | ,@doc |
500 | ,@decls | |
5bf80328 MW |
501 | (let ((,name (zone-make-name ,prefix ,zname))) |
502 | (flet ((,list (&key ((:name ,tname) ,name) | |
503 | ((:type ,ttype) ,type) | |
504 | ((:data ,tdata) ,data) | |
590ad961 MW |
505 | ((:ttl ,tttl) ,ttl) |
506 | ((:make-ptr-p ,tmakeptrp) nil)) | |
f4decf40 | 507 | #+cmu (declare (optimize ext:inhibit-warnings)) |
5bf80328 MW |
508 | (collect (make-zone-record :name ,tname |
509 | :type ,ttype | |
510 | :data ,tdata | |
590ad961 MW |
511 | :ttl ,tttl |
512 | :make-ptr-p ,tmakeptrp) | |
5bf80328 MW |
513 | ,col))) |
514 | ,@body))) | |
515 | ',type))))) | |
7e282fb5 | 516 | |
517 | (defun zone-parse-records (zone records) | |
518 | (let ((zname (zone-name zone))) | |
519 | (with-collection (rec) | |
520 | (flet ((parse-record (zr) | |
521 | (let ((func (or (get (zr-type zr) 'zone-parse) | |
522 | (error "No parser for record ~A." | |
523 | (zr-type zr)))) | |
5bf80328 | 524 | (name (and (zr-name zr) (stringify (zr-name zr))))) |
7e282fb5 | 525 | (funcall func |
526 | name | |
5bf80328 | 527 | zname |
7e282fb5 | 528 | (zr-data zr) |
529 | (zr-ttl zr) | |
5bf80328 | 530 | rec)))) |
7e282fb5 | 531 | (zone-process-records records |
532 | (zone-default-ttl zone) | |
7fff3797 | 533 | #'parse-record)) |
7e282fb5 | 534 | (setf (zone-records zone) (nconc (zone-records zone) rec))))) |
535 | ||
afa2e2f1 | 536 | (export 'zone-parse) |
7e282fb5 | 537 | (defun zone-parse (zf) |
f38bc59e MW |
538 | "Parse a ZONE form. |
539 | ||
540 | The syntax of a zone form is as follows: | |
7e282fb5 | 541 | |
2f1d381d MW |
542 | ZONE-FORM: |
543 | ZONE-HEAD ZONE-RECORD* | |
7e282fb5 | 544 | |
2f1d381d MW |
545 | ZONE-RECORD: |
546 | ((NAME*) ZONE-RECORD*) | |
547 | | SYM ARGS" | |
7e282fb5 | 548 | (multiple-value-bind (zname ttl soa) (zone-parse-head (car zf)) |
549 | (let ((zone (make-zone :name zname | |
550 | :default-ttl ttl | |
551 | :soa soa | |
552 | :records nil))) | |
553 | (zone-parse-records zone (cdr zf)) | |
554 | zone))) | |
555 | ||
afa2e2f1 | 556 | (export 'zone-create) |
fe5fb85a MW |
557 | (defun zone-create (zf) |
558 | "Zone construction function. Given a zone form ZF, construct the zone and | |
2f1d381d | 559 | add it to the table." |
fe5fb85a MW |
560 | (let* ((zone (zone-parse zf)) |
561 | (name (zone-name zone))) | |
562 | (setf (zone-find name) zone) | |
563 | name)) | |
564 | ||
afa2e2f1 | 565 | (export 'defzone) |
fe5fb85a MW |
566 | (defmacro defzone (soa &rest zf) |
567 | "Zone definition macro." | |
568 | `(zone-create '(,soa ,@zf))) | |
569 | ||
afa2e2f1 | 570 | (export 'defrevzone) |
fe5fb85a MW |
571 | (defmacro defrevzone (head &rest zf) |
572 | "Define a reverse zone, with the correct name." | |
573 | (destructuring-bind | |
574 | (net &rest soa-args) | |
575 | (listify head) | |
576 | (let ((bytes nil)) | |
577 | (when (and soa-args (integerp (car soa-args))) | |
578 | (setf bytes (pop soa-args))) | |
579 | `(zone-create '((,(zone-name-from-net net bytes) ,@soa-args) ,@zf))))) | |
580 | ||
581 | ;;;-------------------------------------------------------------------------- | |
582 | ;;; Zone record parsers. | |
583 | ||
4e7e3780 | 584 | (defzoneparse :a (name data rec) |
7e282fb5 | 585 | ":a IPADDR" |
590ad961 MW |
586 | (rec :data (parse-ipaddr data) :make-ptr-p t)) |
587 | ||
588 | (defzoneparse :svc (name data rec) | |
589 | ":svc IPADDR" | |
590 | (rec :type :a :data (parse-ipaddr data))) | |
fe5fb85a | 591 | |
7e282fb5 | 592 | (defzoneparse :ptr (name data rec :zname zname) |
593 | ":ptr HOST" | |
594 | (rec :data (zone-parse-host data zname))) | |
fe5fb85a | 595 | |
7e282fb5 | 596 | (defzoneparse :cname (name data rec :zname zname) |
597 | ":cname HOST" | |
598 | (rec :data (zone-parse-host data zname))) | |
fe5fb85a | 599 | |
90022a23 MW |
600 | (defzoneparse :txt (name data rec) |
601 | ":txt TEXT" | |
602 | (rec :data data)) | |
603 | ||
7e282fb5 | 604 | (defzoneparse :mx (name data rec :zname zname) |
605 | ":mx ((HOST :prio INT :ip IPADDR)*)" | |
606 | (dolist (mx (listify data)) | |
607 | (destructuring-bind | |
608 | (mxname &key (prio *default-mx-priority*) ip) | |
609 | (listify mx) | |
610 | (let ((host (zone-parse-host mxname zname))) | |
611 | (when ip (rec :name host :type :a :data (parse-ipaddr ip))) | |
612 | (rec :data (cons host prio)))))) | |
fe5fb85a | 613 | |
7e282fb5 | 614 | (defzoneparse :ns (name data rec :zname zname) |
615 | ":ns ((HOST :ip IPADDR)*)" | |
616 | (dolist (ns (listify data)) | |
617 | (destructuring-bind | |
618 | (nsname &key ip) | |
619 | (listify ns) | |
620 | (let ((host (zone-parse-host nsname zname))) | |
621 | (when ip (rec :name host :type :a :data (parse-ipaddr ip))) | |
622 | (rec :data host))))) | |
fe5fb85a | 623 | |
7e282fb5 | 624 | (defzoneparse :alias (name data rec :zname zname) |
625 | ":alias (LABEL*)" | |
626 | (dolist (a (listify data)) | |
627 | (rec :name (zone-parse-host a zname) | |
628 | :type :cname | |
629 | :data name))) | |
fe5fb85a | 630 | |
716105aa MW |
631 | (defzoneparse :srv (name data rec :zname zname) |
632 | ":srv (((SERVICE &key :port) (PROVIDER &key :port :prio :weight :ip)*)*)" | |
633 | (dolist (srv data) | |
634 | (destructuring-bind (servopts &rest providers) srv | |
635 | (destructuring-bind | |
636 | (service &key ((:port default-port)) (protocol :tcp)) | |
637 | (listify servopts) | |
638 | (unless default-port | |
639 | (let ((serv (serv-by-name service protocol))) | |
640 | (setf default-port (and serv (serv-port serv))))) | |
641 | (let ((rname (format nil "~(_~A._~A~).~A" service protocol name))) | |
642 | (dolist (prov providers) | |
643 | (destructuring-bind | |
644 | (srvname | |
645 | &key | |
646 | (port default-port) | |
647 | (prio *default-mx-priority*) | |
648 | (weight 0) | |
649 | ip) | |
650 | (listify prov) | |
651 | (let ((host (zone-parse-host srvname zname))) | |
652 | (when ip (rec :name host :type :a :data (parse-ipaddr ip))) | |
653 | (rec :name rname | |
654 | :data (list prio weight port host)))))))))) | |
655 | ||
a15288b4 | 656 | (defzoneparse :net (name data rec) |
657 | ":net (NETWORK*)" | |
658 | (dolist (net (listify data)) | |
659 | (let ((n (net-get-as-ipnet net))) | |
660 | (rec :name (zone-parse-host "net" name) | |
661 | :type :a | |
662 | :data (ipnet-net n)) | |
663 | (rec :name (zone-parse-host "mask" name) | |
664 | :type :a | |
665 | :data (ipnet-mask n)) | |
098b57a2 | 666 | (rec :name (zone-parse-host "bcast" name) |
a15288b4 | 667 | :type :a |
668 | :data (ipnet-broadcast n))))) | |
7fff3797 | 669 | |
7e282fb5 | 670 | (defzoneparse (:rev :reverse) (name data rec) |
679775ba MW |
671 | ":reverse ((NET :bytes BYTES) ZONE*) |
672 | ||
673 | Add a reverse record each host in the ZONEs (or all zones) that lies | |
674 | within NET. The BYTES give the number of prefix labels generated; this | |
675 | defaults to the smallest number of bytes needed to enumerate the net." | |
7e282fb5 | 676 | (setf data (listify data)) |
cc0fa47a | 677 | (destructuring-bind (net &key bytes) (listify (car data)) |
7e282fb5 | 678 | (setf net (zone-parse-net net name)) |
679 | (unless bytes | |
680 | (setf bytes (ipnet-changeable-bytes (ipnet-mask net)))) | |
4e7e3780 MW |
681 | (let ((seen (make-hash-table :test #'equal))) |
682 | (dolist (z (or (cdr data) | |
683 | (hash-table-keys *zones*))) | |
684 | (dolist (zr (zone-records (zone-find z))) | |
685 | (when (and (eq (zr-type zr) :a) | |
590ad961 | 686 | (zr-make-ptr-p zr) |
4e7e3780 MW |
687 | (ipaddr-networkp (zr-data zr) net)) |
688 | (let ((name (string-downcase | |
689 | (join-strings | |
690 | #\. | |
691 | (collecting () | |
692 | (dotimes (i bytes) | |
693 | (collect (logand #xff (ash (zr-data zr) | |
694 | (* -8 i))))) | |
695 | (collect name)))))) | |
696 | (unless (gethash name seen) | |
697 | (rec :name name :type :ptr | |
698 | :ttl (zr-ttl zr) :data (zr-name zr)) | |
699 | (setf (gethash name seen) t))))))))) | |
7e282fb5 | 700 | |
cc0fa47a | 701 | (defzoneparse (:cidr-delegation :cidr) (name data rec :zname zname) |
679775ba MW |
702 | ":cidr-delegation ((NET :bytes BYTES) ((TARGET-NET*) [TARGET-ZONE])*) |
703 | ||
704 | Insert CNAME records for delegating a portion of the reverse-lookup | |
705 | namespace which doesn't align with an octet boundary. | |
706 | ||
707 | The NET specifies the origin network, in which the reverse records | |
708 | naturally lie. The BYTES are the number of labels to supply for each | |
709 | address; the default is the smallest number which suffices to enumerate | |
710 | the entire NET. The TARGET-NETs are subnets of NET which are to be | |
711 | delegated. The TARGET-ZONEs are the zones to which we are delegating | |
712 | authority for the reverse records: the default is to append labels for those | |
713 | octets of the subnet base address which are not the same in all address in | |
714 | the subnet." | |
cc0fa47a MW |
715 | (setf data (listify data)) |
716 | (destructuring-bind (net &key bytes) (listify (car data)) | |
7e282fb5 | 717 | (setf net (zone-parse-net net name)) |
718 | (unless bytes | |
719 | (setf bytes (ipnet-changeable-bytes (ipnet-mask net)))) | |
cc0fa47a | 720 | (dolist (map (or (cdr data) (list (list net)))) |
4440be0d MW |
721 | (destructuring-bind (tnets &optional tdom) (listify map) |
722 | (dolist (tnet (listify tnets)) | |
723 | (setf tnet (zone-parse-net tnet name)) | |
724 | (unless (ipnet-subnetp net tnet) | |
725 | (error "~A is not a subnet of ~A." | |
726 | (ipnet-pretty tnet) | |
727 | (ipnet-pretty net))) | |
728 | (unless tdom | |
729 | (with-ipnet (net mask) tnet | |
730 | (setf tdom | |
731 | (join-strings | |
732 | #\. | |
733 | (append (reverse (loop | |
734 | for i from (1- bytes) downto 0 | |
735 | until (zerop (logand mask | |
736 | (ash #xff | |
737 | (* 8 i)))) | |
738 | collect (ldb (byte 8 (* i 8)) net))) | |
739 | (list name)))))) | |
740 | (setf tdom (string-downcase (stringify tdom))) | |
741 | (dotimes (i (ipnet-hosts tnet)) | |
742 | (unless (zerop i) | |
743 | (let* ((addr (ipnet-host tnet i)) | |
744 | (tail (join-strings #\. | |
745 | (loop | |
746 | for i from 0 below bytes | |
747 | collect | |
748 | (logand #xff | |
749 | (ash addr (* 8 i))))))) | |
750 | (rec :name (format nil "~A.~A" tail name) | |
751 | :type :cname | |
752 | :data (format nil "~A.~A" tail tdom)))))))))) | |
7e282fb5 | 753 | |
fe5fb85a MW |
754 | ;;;-------------------------------------------------------------------------- |
755 | ;;; Zone file output. | |
7e282fb5 | 756 | |
afa2e2f1 | 757 | (export 'zone-write) |
a567a3bc MW |
758 | (defgeneric zone-write (format zone stream) |
759 | (:documentation "Write ZONE's records to STREAM in the specified FORMAT.")) | |
760 | ||
761 | (defvar *writing-zone* nil | |
762 | "The zone currently being written.") | |
763 | ||
764 | (defvar *zone-output-stream* nil | |
765 | "Stream to write zone data on.") | |
766 | ||
767 | (defmethod zone-write :around (format zone stream) | |
768 | (let ((*writing-zone* zone) | |
769 | (*zone-output-stream* stream)) | |
770 | (call-next-method))) | |
771 | ||
afa2e2f1 | 772 | (export 'zone-save) |
a567a3bc MW |
773 | (defun zone-save (zones &key (format :bind)) |
774 | "Write the named ZONES to files. If no zones are given, write all the | |
775 | zones." | |
776 | (unless zones | |
777 | (setf zones (hash-table-keys *zones*))) | |
778 | (safely (safe) | |
779 | (dolist (z zones) | |
780 | (let ((zz (zone-find z))) | |
781 | (unless zz | |
782 | (error "Unknown zone `~A'." z)) | |
783 | (let ((stream (safely-open-output-stream safe | |
784 | (zone-file-name z :zone)))) | |
785 | (zone-write format zz stream)))))) | |
786 | ||
787 | ;;;-------------------------------------------------------------------------- | |
788 | ;;; Bind format output. | |
789 | ||
afa2e2f1 | 790 | (export 'bind-hostname) |
a567a3bc MW |
791 | (defun bind-hostname (hostname) |
792 | (if (not hostname) | |
793 | "@" | |
794 | (let* ((h (string-downcase (stringify hostname))) | |
795 | (hl (length h)) | |
796 | (r (string-downcase (zone-name *writing-zone*))) | |
797 | (rl (length r))) | |
798 | (cond ((string= r h) "@") | |
799 | ((and (> hl rl) | |
800 | (char= (char h (- hl rl 1)) #\.) | |
801 | (string= h r :start1 (- hl rl))) | |
802 | (subseq h 0 (- hl rl 1))) | |
803 | (t (concatenate 'string h ".")))))) | |
804 | ||
805 | (defmethod zone-write ((format (eql :bind)) zone stream) | |
806 | (format stream "~ | |
7e282fb5 | 807 | ;;; Zone file `~(~A~)' |
808 | ;;; (generated ~A) | |
809 | ||
7d593efd MW |
810 | $ORIGIN ~0@*~(~A.~) |
811 | $TTL ~2@*~D~2%" | |
7e282fb5 | 812 | (zone-name zone) |
813 | (iso-date :now :datep t :timep t) | |
814 | (zone-default-ttl zone)) | |
a567a3bc MW |
815 | (let* ((soa (zone-soa zone)) |
816 | (admin (let* ((name (soa-admin soa)) | |
817 | (at (position #\@ name)) | |
818 | (copy (format nil "~(~A~)." name))) | |
819 | (when at | |
820 | (setf (char copy at) #\.)) | |
821 | copy))) | |
7e282fb5 | 822 | (format stream "~ |
823 | ~A~30TIN SOA~40T~A ~A ( | |
824 | ~45T~10D~60T ;serial | |
825 | ~45T~10D~60T ;refresh | |
826 | ~45T~10D~60T ;retry | |
827 | ~45T~10D~60T ;expire | |
828 | ~45T~10D )~60T ;min-ttl~2%" | |
a567a3bc MW |
829 | (bind-hostname (zone-name zone)) |
830 | (bind-hostname (soa-source soa)) | |
831 | admin | |
7e282fb5 | 832 | (soa-serial soa) |
833 | (soa-refresh soa) | |
834 | (soa-retry soa) | |
835 | (soa-expire soa) | |
836 | (soa-min-ttl soa))) | |
a567a3bc MW |
837 | (dolist (zr (zone-records zone)) |
838 | (bind-record (zr-type zr) zr))) | |
839 | ||
afa2e2f1 | 840 | (export 'bind-record) |
a567a3bc MW |
841 | (defgeneric bind-record (type zr)) |
842 | ||
afa2e2f1 | 843 | (export 'bind-format-record) |
a567a3bc MW |
844 | (defun bind-format-record (name ttl type format args) |
845 | (format *zone-output-stream* | |
846 | "~A~20T~@[~8D~]~30TIN ~A~40T~?~%" | |
847 | (bind-hostname name) | |
848 | (and (/= ttl (zone-default-ttl *writing-zone*)) | |
849 | ttl) | |
850 | (string-upcase (symbol-name type)) | |
851 | format args)) | |
852 | ||
853 | (defmethod bind-record (type zr) | |
854 | (destructuring-bind (format &rest args) | |
855 | (bind-record-format-args type (zr-data zr)) | |
856 | (bind-format-record (zr-name zr) | |
857 | (zr-ttl zr) | |
858 | (bind-record-type type) | |
859 | format args))) | |
860 | ||
afa2e2f1 | 861 | (export 'bind-record-type) |
a567a3bc MW |
862 | (defgeneric bind-record-type (type) |
863 | (:method (type) type)) | |
864 | ||
afa2e2f1 | 865 | (export 'bind-record-format-args) |
a567a3bc MW |
866 | (defgeneric bind-record-format-args (type data) |
867 | (:method ((type (eql :a)) data) (list "~A" (ipaddr-string data))) | |
868 | (:method ((type (eql :ptr)) data) (list "~A" (bind-hostname data))) | |
869 | (:method ((type (eql :cname)) data) (list "~A" (bind-hostname data))) | |
870 | (:method ((type (eql :ns)) data) (list "~A" (bind-hostname data))) | |
871 | (:method ((type (eql :mx)) data) | |
872 | (list "~2D ~A" (cdr data) (bind-hostname (car data)))) | |
716105aa MW |
873 | (:method ((type (eql :srv)) data) |
874 | (destructuring-bind (prio weight port host) data | |
875 | (list "~2D ~5D ~5D ~A" prio weight port (bind-hostname host)))) | |
a567a3bc | 876 | (:method ((type (eql :txt)) data) (list "~S" (stringify data)))) |
7e282fb5 | 877 | |
878 | ;;;----- That's all, folks -------------------------------------------------- |