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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. | |
7fff3797 | 16 | ;;; |
7e282fb5 | 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. | |
7fff3797 | 21 | ;;; |
7e282fb5 | 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 |
85c39c01 | 30 | (:use #:common-lisp #:mdw.base #:mdw.str #:collect #:safely #:net) |
9c44003b | 31 | (:export #:soa #:mx #:zone #:zone-record #:zone-subdomain |
7e282fb5 | 32 | #:*default-zone-source* #:*default-zone-refresh* |
33 | #:*default-zone-retry* #:*default-zone-expire* | |
34 | #:*default-zone-min-ttl* #:*default-zone-ttl* | |
35 | #:*default-mx-priority* #:*default-zone-admin* | |
ab87c7bf | 36 | #:*zone-output-path* |
8ce7eb9b | 37 | #:*preferred-subnets* #:zone-preferred-subnet-p |
8bd2576e | 38 | #:preferred-subnet-case |
5fbfaf49 | 39 | #:zone-find #:zone-parse #:zone-write #:zone-create #:defzone |
5bf80328 | 40 | #:defrevzone #:zone-save #:zone-make-name |
a15288b4 | 41 | #:defzoneparse #:zone-parse-host |
a567a3bc MW |
42 | #:bind-hostname #:bind-record #:bind-format-record |
43 | #:bind-record-type #:bind-record-format-args | |
7e282fb5 | 44 | #:timespec-seconds #:make-zone-serial)) |
fe5fb85a | 45 | |
7e282fb5 | 46 | (in-package #:zone) |
47 | ||
fe5fb85a | 48 | ;;;-------------------------------------------------------------------------- |
fe5fb85a MW |
49 | ;;; Various random utilities. |
50 | ||
51 | (defun to-integer (x) | |
52 | "Convert X to an integer in the most straightforward way." | |
53 | (floor (rational x))) | |
54 | ||
55 | (defun from-mixed-base (base val) | |
56 | "BASE is a list of the ranges for the `digits' of a mixed-base | |
2f1d381d | 57 | representation. Convert VAL, a list of digits, into an integer." |
fe5fb85a MW |
58 | (do ((base base (cdr base)) |
59 | (val (cdr val) (cdr val)) | |
60 | (a (car val) (+ (* a (car base)) (car val)))) | |
61 | ((or (null base) (null val)) a))) | |
62 | ||
63 | (defun to-mixed-base (base val) | |
64 | "BASE is a list of the ranges for the `digits' of a mixed-base | |
2f1d381d | 65 | representation. Convert VAL, an integer, into a list of digits." |
fe5fb85a MW |
66 | (let ((base (reverse base)) |
67 | (a nil)) | |
68 | (loop | |
69 | (unless base | |
70 | (push val a) | |
71 | (return a)) | |
72 | (multiple-value-bind (q r) (floor val (pop base)) | |
73 | (push r a) | |
74 | (setf val q))))) | |
75 | ||
76 | (defun timespec-seconds (ts) | |
77 | "Convert a timespec TS to seconds. A timespec may be a real count of | |
2f1d381d MW |
78 | seconds, or a list (COUNT UNIT): UNIT may be any of a number of obvious |
79 | time units." | |
fe5fb85a MW |
80 | (cond ((null ts) 0) |
81 | ((realp ts) (floor ts)) | |
82 | ((atom ts) | |
83 | (error "Unknown timespec format ~A" ts)) | |
84 | ((null (cdr ts)) | |
85 | (timespec-seconds (car ts))) | |
86 | (t (+ (to-integer (* (car ts) | |
87 | (case (intern (string-upcase | |
88 | (stringify (cadr ts))) | |
89 | '#:zone) | |
90 | ((s sec secs second seconds) 1) | |
91 | ((m min mins minute minutes) 60) | |
92 | ((h hr hrs hour hours) #.(* 60 60)) | |
93 | ((d dy dys day days) #.(* 24 60 60)) | |
94 | ((w wk wks week weeks) #.(* 7 24 60 60)) | |
95 | ((y yr yrs year years) #.(* 365 24 60 60)) | |
96 | (t (error "Unknown time unit ~A" | |
97 | (cadr ts)))))) | |
98 | (timespec-seconds (cddr ts)))))) | |
99 | ||
100 | (defun hash-table-keys (ht) | |
101 | "Return a list of the keys in hashtable HT." | |
102 | (collecting () | |
103 | (maphash (lambda (key val) (declare (ignore val)) (collect key)) ht))) | |
104 | ||
105 | (defun iso-date (&optional time &key datep timep (sep #\ )) | |
106 | "Construct a textual date or time in ISO format. The TIME is the universal | |
2f1d381d MW |
107 | time to convert, which defaults to now; DATEP is whether to emit the date; |
108 | TIMEP is whether to emit the time, and SEP (default is space) is how to | |
109 | separate the two." | |
fe5fb85a MW |
110 | (multiple-value-bind |
111 | (sec min hr day mon yr dow dstp tz) | |
112 | (decode-universal-time (if (or (null time) (eq time :now)) | |
113 | (get-universal-time) | |
114 | time)) | |
115 | (declare (ignore dow dstp tz)) | |
116 | (with-output-to-string (s) | |
117 | (when datep | |
118 | (format s "~4,'0D-~2,'0D-~2,'0D" yr mon day) | |
119 | (when timep | |
120 | (write-char sep s))) | |
121 | (when timep | |
122 | (format s "~2,'0D:~2,'0D:~2,'0D" hr min sec))))) | |
123 | ||
fe5fb85a MW |
124 | ;;;-------------------------------------------------------------------------- |
125 | ;;; Zone types. | |
7e282fb5 | 126 | |
127 | (defstruct (soa (:predicate soap)) | |
128 | "Start-of-authority record information." | |
129 | source | |
130 | admin | |
131 | refresh | |
132 | retry | |
133 | expire | |
134 | min-ttl | |
135 | serial) | |
fe5fb85a | 136 | |
7e282fb5 | 137 | (defstruct (mx (:predicate mxp)) |
138 | "Mail-exchange record information." | |
139 | priority | |
140 | domain) | |
fe5fb85a | 141 | |
7e282fb5 | 142 | (defstruct (zone (:predicate zonep)) |
143 | "Zone information." | |
144 | soa | |
145 | default-ttl | |
146 | name | |
147 | records) | |
148 | ||
fe5fb85a MW |
149 | ;;;-------------------------------------------------------------------------- |
150 | ;;; Zone defaults. It is intended that scripts override these. | |
151 | ||
51a6847e MW |
152 | #+ecl |
153 | (cffi:defcfun gethostname :int | |
154 | (name :pointer) | |
155 | (len :uint)) | |
156 | ||
7e282fb5 | 157 | (defvar *default-zone-source* |
7d593efd | 158 | (let ((hn #+cmu (unix:unix-gethostname) |
51a6847e MW |
159 | #+clisp (unix:get-host-name) |
160 | #+ecl (cffi:with-foreign-pointer-as-string (buffer 256 len) | |
161 | (let ((rc (gethostname buffer len))) | |
162 | (unless (zerop rc) | |
163 | (error "gethostname(2) failed (rc = ~A)." rc)))))) | |
8a4f9a18 | 164 | (and hn (concatenate 'string (canonify-hostname hn) "."))) |
7e282fb5 | 165 | "The default zone source: the current host's name.") |
fe5fb85a | 166 | |
7e282fb5 | 167 | (defvar *default-zone-refresh* (* 24 60 60) |
168 | "Default zone refresh interval: one day.") | |
fe5fb85a | 169 | |
7e282fb5 | 170 | (defvar *default-zone-admin* nil |
171 | "Default zone administrator's email address.") | |
fe5fb85a | 172 | |
7e282fb5 | 173 | (defvar *default-zone-retry* (* 60 60) |
174 | "Default znoe retry interval: one hour.") | |
fe5fb85a | 175 | |
7e282fb5 | 176 | (defvar *default-zone-expire* (* 14 24 60 60) |
177 | "Default zone expiry time: two weeks.") | |
fe5fb85a | 178 | |
7e282fb5 | 179 | (defvar *default-zone-min-ttl* (* 4 60 60) |
180 | "Default zone minimum TTL/negative TTL: four hours.") | |
fe5fb85a | 181 | |
7e282fb5 | 182 | (defvar *default-zone-ttl* (* 8 60 60) |
183 | "Default zone TTL (for records without explicit TTLs): 8 hours.") | |
fe5fb85a | 184 | |
7e282fb5 | 185 | (defvar *default-mx-priority* 50 |
186 | "Default MX priority.") | |
187 | ||
fe5fb85a | 188 | ;;;-------------------------------------------------------------------------- |
fe5fb85a MW |
189 | ;;; Zone variables and structures. |
190 | ||
7e282fb5 | 191 | (defvar *zones* (make-hash-table :test #'equal) |
192 | "Map of known zones.") | |
fe5fb85a | 193 | |
7e282fb5 | 194 | (defun zone-find (name) |
195 | "Find a zone given its NAME." | |
196 | (gethash (string-downcase (stringify name)) *zones*)) | |
fe5fb85a | 197 | |
7e282fb5 | 198 | (defun (setf zone-find) (zone name) |
199 | "Make the zone NAME map to ZONE." | |
200 | (setf (gethash (string-downcase (stringify name)) *zones*) zone)) | |
201 | ||
202 | (defstruct (zone-record (:conc-name zr-)) | |
203 | "A zone record." | |
204 | (name '<unnamed>) | |
205 | ttl | |
206 | type | |
590ad961 | 207 | (make-ptr-p nil) |
7e282fb5 | 208 | data) |
209 | ||
210 | (defstruct (zone-subdomain (:conc-name zs-)) | |
211 | "A subdomain. Slightly weird. Used internally by zone-process-records | |
2f1d381d | 212 | below, and shouldn't escape." |
7e282fb5 | 213 | name |
214 | ttl | |
215 | records) | |
216 | ||
ab87c7bf MW |
217 | (defvar *zone-output-path* *default-pathname-defaults* |
218 | "Pathname defaults to merge into output files.") | |
219 | ||
8ce7eb9b MW |
220 | (defvar *preferred-subnets* nil |
221 | "Subnets to prefer when selecting defaults.") | |
222 | ||
fe5fb85a MW |
223 | ;;;-------------------------------------------------------------------------- |
224 | ;;; Zone infrastructure. | |
225 | ||
ab87c7bf MW |
226 | (defun zone-file-name (zone type) |
227 | "Choose a file name for a given ZONE and TYPE." | |
228 | (merge-pathnames (make-pathname :name (string-downcase zone) | |
229 | :type (string-downcase type)) | |
230 | *zone-output-path*)) | |
231 | ||
8ce7eb9b MW |
232 | (defun zone-preferred-subnet-p (name) |
233 | "Answer whether NAME (a string or symbol) names a preferred subnet." | |
234 | (member name *preferred-subnets* :test #'string-equal)) | |
235 | ||
8bd2576e MW |
236 | (defmacro preferred-subnet-case (&body clauses) |
237 | "CLAUSES have the form (SUBNETS . FORMS) -- evaluate the first FORMS whose | |
238 | SUBNETS (a list or single symbol, not evaluated) are considered preferred | |
239 | by zone-preferred-subnet-p. If SUBNETS is the symbol t then the clause | |
240 | always matches." | |
241 | `(cond | |
242 | ,@(mapcar (lambda (clause) | |
243 | (let ((subnets (car clause))) | |
244 | (cons (cond ((eq subnets t) | |
245 | t) | |
246 | ((listp subnets) | |
247 | `(or ,@(mapcar (lambda (subnet) | |
248 | `(zone-preferred-subnet-p | |
249 | ',subnet)) | |
250 | subnets))) | |
251 | (t | |
252 | `(zone-preferred-subnet-p ',subnets))) | |
253 | (cdr clause)))) | |
254 | clauses))) | |
255 | ||
7e282fb5 | 256 | (defun zone-process-records (rec ttl func) |
257 | "Sort out the list of records in REC, calling FUNC for each one. TTL is | |
2f1d381d | 258 | the default time-to-live for records which don't specify one." |
7e282fb5 | 259 | (labels ((sift (rec ttl) |
260 | (collecting (top sub) | |
261 | (loop | |
262 | (unless rec | |
263 | (return)) | |
264 | (let ((r (pop rec))) | |
265 | (cond ((eq r :ttl) | |
266 | (setf ttl (pop rec))) | |
267 | ((symbolp r) | |
268 | (collect (make-zone-record :type r | |
269 | :ttl ttl | |
270 | :data (pop rec)) | |
271 | top)) | |
272 | ((listp r) | |
273 | (dolist (name (listify (car r))) | |
274 | (collect (make-zone-subdomain :name name | |
275 | :ttl ttl | |
276 | :records (cdr r)) | |
277 | sub))) | |
278 | (t | |
279 | (error "Unexpected record form ~A" (car r)))))))) | |
4e7e3780 | 280 | (process (rec dom ttl) |
7e282fb5 | 281 | (multiple-value-bind (top sub) (sift rec ttl) |
282 | (if (and dom (null top) sub) | |
8ce7eb9b MW |
283 | (let ((preferred nil)) |
284 | (dolist (s sub) | |
285 | (when (some #'zone-preferred-subnet-p | |
286 | (listify (zs-name s))) | |
287 | (setf preferred s))) | |
288 | (unless preferred | |
289 | (setf preferred (car sub))) | |
290 | (when preferred | |
291 | (process (zs-records preferred) | |
292 | dom | |
293 | (zs-ttl preferred)))) | |
294 | (let ((name (and dom | |
295 | (string-downcase | |
296 | (join-strings #\. (reverse dom)))))) | |
297 | (dolist (zr top) | |
298 | (setf (zr-name zr) name) | |
299 | (funcall func zr)))) | |
7e282fb5 | 300 | (dolist (s sub) |
301 | (process (zs-records s) | |
302 | (cons (zs-name s) dom) | |
4e7e3780 MW |
303 | (zs-ttl s)))))) |
304 | (process rec nil ttl))) | |
7e282fb5 | 305 | |
306 | (defun zone-parse-host (f zname) | |
307 | "Parse a host name F: if F ends in a dot then it's considered absolute; | |
2f1d381d | 308 | otherwise it's relative to ZNAME." |
7e282fb5 | 309 | (setf f (stringify f)) |
310 | (cond ((string= f "@") (stringify zname)) | |
311 | ((and (plusp (length f)) | |
312 | (char= (char f (1- (length f))) #\.)) | |
313 | (string-downcase (subseq f 0 (1- (length f))))) | |
314 | (t (string-downcase (concatenate 'string f "." | |
315 | (stringify zname)))))) | |
7e282fb5 | 316 | (defun default-rev-zone (base bytes) |
fe5fb85a | 317 | "Return the default reverse-zone name for the given BASE address and number |
2f1d381d | 318 | of fixed leading BYTES." |
7e282fb5 | 319 | (join-strings #\. (collecting () |
320 | (loop for i from (- 3 bytes) downto 0 | |
321 | do (collect (ipaddr-byte base i))) | |
322 | (collect "in-addr.arpa")))) | |
323 | ||
324 | (defun zone-name-from-net (net &optional bytes) | |
325 | "Given a NET, and maybe the BYTES to use, convert to the appropriate | |
2f1d381d | 326 | subdomain of in-addr.arpa." |
7e282fb5 | 327 | (let ((ipn (net-get-as-ipnet net))) |
328 | (with-ipnet (net mask) ipn | |
329 | (unless bytes | |
330 | (setf bytes (- 4 (ipnet-changeable-bytes mask)))) | |
331 | (join-strings #\. | |
332 | (append (loop | |
333 | for i from (- 4 bytes) below 4 | |
334 | collect (logand #xff (ash net (* -8 i)))) | |
335 | (list "in-addr.arpa")))))) | |
fe5fb85a | 336 | |
7e282fb5 | 337 | (defun zone-net-from-name (name) |
338 | "Given a NAME in the in-addr.arpa space, convert it to an ipnet." | |
339 | (let* ((name (string-downcase (stringify name))) | |
340 | (len (length name)) | |
341 | (suffix ".in-addr.arpa") | |
342 | (sufflen (length suffix)) | |
343 | (addr 0) | |
344 | (n 0) | |
345 | (end (- len sufflen))) | |
346 | (unless (and (> len sufflen) | |
347 | (string= name suffix :start1 end)) | |
348 | (error "`~A' not in ~A." name suffix)) | |
349 | (loop | |
350 | with start = 0 | |
351 | for dot = (position #\. name :start start :end end) | |
352 | for byte = (parse-integer name | |
353 | :start start | |
354 | :end (or dot end)) | |
355 | do (setf addr (logior addr (ash byte (* 8 n)))) | |
356 | (incf n) | |
357 | when (>= n 4) | |
358 | do (error "Can't deduce network from ~A." name) | |
359 | while dot | |
360 | do (setf start (1+ dot))) | |
361 | (setf addr (ash addr (* 8 (- 4 n)))) | |
362 | (make-ipnet addr (* 8 n)))) | |
363 | ||
7e282fb5 | 364 | (defun zone-parse-net (net name) |
2f1d381d MW |
365 | "Given a NET, and the NAME of a domain to guess from if NET is null, return |
366 | the ipnet for the network." | |
7e282fb5 | 367 | (if net |
368 | (net-get-as-ipnet net) | |
369 | (zone-net-from-name name))) | |
370 | ||
371 | (defun zone-cidr-delg-default-name (ipn bytes) | |
372 | "Given a delegated net IPN and the parent's number of changing BYTES, | |
2f1d381d | 373 | return the default deletate zone prefix." |
7e282fb5 | 374 | (with-ipnet (net mask) ipn |
375 | (join-strings #\. | |
376 | (reverse | |
377 | (loop | |
378 | for i from (1- bytes) downto 0 | |
379 | until (zerop (logand mask (ash #xff (* 8 i)))) | |
380 | collect (logand #xff (ash net (* -8 i)))))))) | |
381 | ||
fe5fb85a | 382 | ;;;-------------------------------------------------------------------------- |
ab87c7bf MW |
383 | ;;; Serial numbering. |
384 | ||
385 | (defun make-zone-serial (name) | |
386 | "Given a zone NAME, come up with a new serial number. This will (very | |
387 | carefully) update a file ZONE.serial in the current directory." | |
388 | (let* ((file (zone-file-name name :serial)) | |
389 | (last (with-open-file (in file | |
390 | :direction :input | |
391 | :if-does-not-exist nil) | |
392 | (if in (read in) | |
393 | (list 0 0 0 0)))) | |
394 | (now (multiple-value-bind | |
395 | (sec min hr dy mon yr dow dstp tz) | |
396 | (get-decoded-time) | |
397 | (declare (ignore sec min hr dow dstp tz)) | |
398 | (list dy mon yr))) | |
399 | (seq (cond ((not (equal now (cdr last))) 0) | |
400 | ((< (car last) 99) (1+ (car last))) | |
401 | (t (error "Run out of sequence numbers for ~A" name))))) | |
402 | (safely-writing (out file) | |
403 | (format out | |
404 | ";; Serial number file for zone ~A~%~ | |
405 | ;; (LAST-SEQ DAY MONTH YEAR)~%~ | |
406 | ~S~%" | |
407 | name | |
408 | (cons seq now))) | |
409 | (from-mixed-base '(100 100 100) (reverse (cons seq now))))) | |
410 | ||
411 | ;;;-------------------------------------------------------------------------- | |
fe5fb85a | 412 | ;;; Zone form parsing. |
7e282fb5 | 413 | |
414 | (defun zone-parse-head (head) | |
415 | "Parse the HEAD of a zone form. This has the form | |
416 | ||
417 | (NAME &key :source :admin :refresh :retry | |
418 | :expire :min-ttl :ttl :serial) | |
419 | ||
2f1d381d MW |
420 | though a singleton NAME needn't be a list. Returns the default TTL and an |
421 | soa structure representing the zone head." | |
7e282fb5 | 422 | (destructuring-bind |
423 | (zname | |
424 | &key | |
8a4f9a18 | 425 | (source *default-zone-source*) |
7e282fb5 | 426 | (admin (or *default-zone-admin* |
427 | (format nil "hostmaster@~A" zname))) | |
428 | (refresh *default-zone-refresh*) | |
429 | (retry *default-zone-retry*) | |
430 | (expire *default-zone-expire*) | |
431 | (min-ttl *default-zone-min-ttl*) | |
432 | (ttl min-ttl) | |
433 | (serial (make-zone-serial zname))) | |
434 | (listify head) | |
435 | (values zname | |
436 | (timespec-seconds ttl) | |
437 | (make-soa :admin admin | |
438 | :source (zone-parse-host source zname) | |
439 | :refresh (timespec-seconds refresh) | |
440 | :retry (timespec-seconds retry) | |
441 | :expire (timespec-seconds expire) | |
442 | :min-ttl (timespec-seconds min-ttl) | |
443 | :serial serial)))) | |
444 | ||
5bf80328 MW |
445 | (defun zone-make-name (prefix zone-name) |
446 | (if (or (not prefix) (string= prefix "@")) | |
447 | zone-name | |
448 | (let ((len (length prefix))) | |
449 | (if (or (zerop len) (char/= (char prefix (1- len)) #\.)) | |
450 | (join-strings #\. (list prefix zone-name)) | |
451 | prefix)))) | |
452 | ||
7e282fb5 | 453 | (defmacro defzoneparse (types (name data list |
5bf80328 MW |
454 | &key (prefix (gensym "PREFIX")) |
455 | (zname (gensym "ZNAME")) | |
4e7e3780 | 456 | (ttl (gensym "TTL"))) |
7e282fb5 | 457 | &body body) |
fe5fb85a | 458 | "Define a new zone record type (or TYPES -- a list of synonyms is |
2f1d381d | 459 | permitted). The arguments are as follows: |
fe5fb85a | 460 | |
2f1d381d | 461 | NAME The name of the record to be added. |
fe5fb85a | 462 | |
2f1d381d | 463 | DATA The content of the record to be added (a single object, |
7fff3797 | 464 | unevaluated). |
fe5fb85a | 465 | |
2f1d381d | 466 | LIST A function to add a record to the zone. See below. |
fe5fb85a | 467 | |
5bf80328 MW |
468 | PREFIX The prefix tag used in the original form. |
469 | ||
2f1d381d | 470 | ZNAME The name of the zone being constructed. |
fe5fb85a | 471 | |
2f1d381d | 472 | TTL The TTL for this record. |
fe5fb85a | 473 | |
5bf80328 MW |
474 | You get to choose your own names for these. ZNAME, PREFIX and TTL are |
475 | optional: you don't have to accept them if you're not interested. | |
fe5fb85a | 476 | |
2f1d381d MW |
477 | The LIST argument names a function to be bound in the body to add a new |
478 | low-level record to the zone. It has the prototype | |
fe5fb85a | 479 | |
590ad961 | 480 | (LIST &key :name :type :data :ttl :make-ptr-p) |
fe5fb85a | 481 | |
590ad961 MW |
482 | These (except MAKE-PTR-P, which defaults to nil) default to the above |
483 | arguments (even if you didn't accept the arguments)." | |
7e282fb5 | 484 | (setf types (listify types)) |
485 | (let* ((type (car types)) | |
486 | (func (intern (format nil "ZONE-PARSE/~:@(~A~)" type)))) | |
2ec279f5 | 487 | (with-parsed-body (body decls doc) body |
590ad961 | 488 | (with-gensyms (col tname ttype tttl tdata tmakeptrp i) |
40ded1b8 MW |
489 | `(progn |
490 | (dolist (,i ',types) | |
491 | (setf (get ,i 'zone-parse) ',func)) | |
5bf80328 | 492 | (defun ,func (,prefix ,zname ,data ,ttl ,col) |
40ded1b8 MW |
493 | ,@doc |
494 | ,@decls | |
5bf80328 MW |
495 | (let ((,name (zone-make-name ,prefix ,zname))) |
496 | (flet ((,list (&key ((:name ,tname) ,name) | |
497 | ((:type ,ttype) ,type) | |
498 | ((:data ,tdata) ,data) | |
590ad961 MW |
499 | ((:ttl ,tttl) ,ttl) |
500 | ((:make-ptr-p ,tmakeptrp) nil)) | |
5bf80328 MW |
501 | (collect (make-zone-record :name ,tname |
502 | :type ,ttype | |
503 | :data ,tdata | |
590ad961 MW |
504 | :ttl ,tttl |
505 | :make-ptr-p ,tmakeptrp) | |
5bf80328 MW |
506 | ,col))) |
507 | ,@body))) | |
508 | ',type))))) | |
7e282fb5 | 509 | |
510 | (defun zone-parse-records (zone records) | |
511 | (let ((zname (zone-name zone))) | |
512 | (with-collection (rec) | |
513 | (flet ((parse-record (zr) | |
514 | (let ((func (or (get (zr-type zr) 'zone-parse) | |
515 | (error "No parser for record ~A." | |
516 | (zr-type zr)))) | |
5bf80328 | 517 | (name (and (zr-name zr) (stringify (zr-name zr))))) |
7e282fb5 | 518 | (funcall func |
519 | name | |
5bf80328 | 520 | zname |
7e282fb5 | 521 | (zr-data zr) |
522 | (zr-ttl zr) | |
5bf80328 | 523 | rec)))) |
7e282fb5 | 524 | (zone-process-records records |
525 | (zone-default-ttl zone) | |
7fff3797 | 526 | #'parse-record)) |
7e282fb5 | 527 | (setf (zone-records zone) (nconc (zone-records zone) rec))))) |
528 | ||
529 | (defun zone-parse (zf) | |
530 | "Parse a ZONE form. The syntax of a zone form is as follows: | |
531 | ||
2f1d381d MW |
532 | ZONE-FORM: |
533 | ZONE-HEAD ZONE-RECORD* | |
7e282fb5 | 534 | |
2f1d381d MW |
535 | ZONE-RECORD: |
536 | ((NAME*) ZONE-RECORD*) | |
537 | | SYM ARGS" | |
7e282fb5 | 538 | (multiple-value-bind (zname ttl soa) (zone-parse-head (car zf)) |
539 | (let ((zone (make-zone :name zname | |
540 | :default-ttl ttl | |
541 | :soa soa | |
542 | :records nil))) | |
543 | (zone-parse-records zone (cdr zf)) | |
544 | zone))) | |
545 | ||
fe5fb85a MW |
546 | (defun zone-create (zf) |
547 | "Zone construction function. Given a zone form ZF, construct the zone and | |
2f1d381d | 548 | add it to the table." |
fe5fb85a MW |
549 | (let* ((zone (zone-parse zf)) |
550 | (name (zone-name zone))) | |
551 | (setf (zone-find name) zone) | |
552 | name)) | |
553 | ||
554 | (defmacro defzone (soa &rest zf) | |
555 | "Zone definition macro." | |
556 | `(zone-create '(,soa ,@zf))) | |
557 | ||
558 | (defmacro defrevzone (head &rest zf) | |
559 | "Define a reverse zone, with the correct name." | |
560 | (destructuring-bind | |
561 | (net &rest soa-args) | |
562 | (listify head) | |
563 | (let ((bytes nil)) | |
564 | (when (and soa-args (integerp (car soa-args))) | |
565 | (setf bytes (pop soa-args))) | |
566 | `(zone-create '((,(zone-name-from-net net bytes) ,@soa-args) ,@zf))))) | |
567 | ||
568 | ;;;-------------------------------------------------------------------------- | |
569 | ;;; Zone record parsers. | |
570 | ||
4e7e3780 | 571 | (defzoneparse :a (name data rec) |
7e282fb5 | 572 | ":a IPADDR" |
590ad961 MW |
573 | (rec :data (parse-ipaddr data) :make-ptr-p t)) |
574 | ||
575 | (defzoneparse :svc (name data rec) | |
576 | ":svc IPADDR" | |
577 | (rec :type :a :data (parse-ipaddr data))) | |
fe5fb85a | 578 | |
7e282fb5 | 579 | (defzoneparse :ptr (name data rec :zname zname) |
580 | ":ptr HOST" | |
581 | (rec :data (zone-parse-host data zname))) | |
fe5fb85a | 582 | |
7e282fb5 | 583 | (defzoneparse :cname (name data rec :zname zname) |
584 | ":cname HOST" | |
585 | (rec :data (zone-parse-host data zname))) | |
fe5fb85a | 586 | |
7e282fb5 | 587 | (defzoneparse :mx (name data rec :zname zname) |
588 | ":mx ((HOST :prio INT :ip IPADDR)*)" | |
589 | (dolist (mx (listify data)) | |
590 | (destructuring-bind | |
591 | (mxname &key (prio *default-mx-priority*) ip) | |
592 | (listify mx) | |
593 | (let ((host (zone-parse-host mxname zname))) | |
594 | (when ip (rec :name host :type :a :data (parse-ipaddr ip))) | |
595 | (rec :data (cons host prio)))))) | |
fe5fb85a | 596 | |
7e282fb5 | 597 | (defzoneparse :ns (name data rec :zname zname) |
598 | ":ns ((HOST :ip IPADDR)*)" | |
599 | (dolist (ns (listify data)) | |
600 | (destructuring-bind | |
601 | (nsname &key ip) | |
602 | (listify ns) | |
603 | (let ((host (zone-parse-host nsname zname))) | |
604 | (when ip (rec :name host :type :a :data (parse-ipaddr ip))) | |
605 | (rec :data host))))) | |
fe5fb85a | 606 | |
7e282fb5 | 607 | (defzoneparse :alias (name data rec :zname zname) |
608 | ":alias (LABEL*)" | |
609 | (dolist (a (listify data)) | |
610 | (rec :name (zone-parse-host a zname) | |
611 | :type :cname | |
612 | :data name))) | |
fe5fb85a | 613 | |
a15288b4 | 614 | (defzoneparse :net (name data rec) |
615 | ":net (NETWORK*)" | |
616 | (dolist (net (listify data)) | |
617 | (let ((n (net-get-as-ipnet net))) | |
618 | (rec :name (zone-parse-host "net" name) | |
619 | :type :a | |
620 | :data (ipnet-net n)) | |
621 | (rec :name (zone-parse-host "mask" name) | |
622 | :type :a | |
623 | :data (ipnet-mask n)) | |
624 | (rec :name (zone-parse-host "broadcast" name) | |
625 | :type :a | |
626 | :data (ipnet-broadcast n))))) | |
7fff3797 | 627 | |
7e282fb5 | 628 | (defzoneparse (:rev :reverse) (name data rec) |
629 | ":reverse ((NET :bytes BYTES) ZONE*)" | |
630 | (setf data (listify data)) | |
631 | (destructuring-bind | |
632 | (net &key bytes) | |
633 | (listify (car data)) | |
634 | (setf net (zone-parse-net net name)) | |
635 | (unless bytes | |
636 | (setf bytes (ipnet-changeable-bytes (ipnet-mask net)))) | |
4e7e3780 MW |
637 | (let ((seen (make-hash-table :test #'equal))) |
638 | (dolist (z (or (cdr data) | |
639 | (hash-table-keys *zones*))) | |
640 | (dolist (zr (zone-records (zone-find z))) | |
641 | (when (and (eq (zr-type zr) :a) | |
590ad961 | 642 | (zr-make-ptr-p zr) |
4e7e3780 MW |
643 | (ipaddr-networkp (zr-data zr) net)) |
644 | (let ((name (string-downcase | |
645 | (join-strings | |
646 | #\. | |
647 | (collecting () | |
648 | (dotimes (i bytes) | |
649 | (collect (logand #xff (ash (zr-data zr) | |
650 | (* -8 i))))) | |
651 | (collect name)))))) | |
652 | (unless (gethash name seen) | |
653 | (rec :name name :type :ptr | |
654 | :ttl (zr-ttl zr) :data (zr-name zr)) | |
655 | (setf (gethash name seen) t))))))))) | |
7e282fb5 | 656 | |
657 | (defzoneparse (:cidr-delegation :cidr) (name data rec) | |
658 | ":cidr-delegation ((NET :bytes BYTES) (TARGET-NET [TARGET-ZONE])*)" | |
659 | (destructuring-bind | |
660 | (net &key bytes) | |
661 | (listify (car data)) | |
662 | (setf net (zone-parse-net net name)) | |
663 | (unless bytes | |
664 | (setf bytes (ipnet-changeable-bytes (ipnet-mask net)))) | |
665 | (dolist (map (cdr data)) | |
666 | (destructuring-bind | |
667 | (tnet &optional tdom) | |
668 | (listify map) | |
669 | (setf tnet (zone-parse-net tnet name)) | |
670 | (unless (ipnet-subnetp net tnet) | |
671 | (error "~A is not a subnet of ~A." | |
672 | (ipnet-pretty tnet) | |
7fff3797 | 673 | (ipnet-pretty net))) |
7e282fb5 | 674 | (unless tdom |
675 | (with-ipnet (net mask) tnet | |
676 | (setf tdom | |
677 | (join-strings | |
678 | #\. | |
679 | (append (reverse (loop | |
680 | for i from (1- bytes) downto 0 | |
681 | until (zerop (logand mask | |
682 | (ash #xff | |
683 | (* 8 i)))) | |
684 | collect (logand #xff | |
685 | (ash net (* -8 i))))) | |
686 | (list name)))))) | |
687 | (setf tdom (string-downcase tdom)) | |
688 | (dotimes (i (ipnet-hosts tnet)) | |
689 | (let* ((addr (ipnet-host tnet i)) | |
690 | (tail (join-strings #\. | |
691 | (loop | |
692 | for i from 0 below bytes | |
693 | collect | |
694 | (logand #xff | |
695 | (ash addr (* 8 i))))))) | |
696 | (rec :name (format nil "~A.~A" tail name) | |
697 | :type :cname | |
698 | :data (format nil "~A.~A" tail tdom)))))))) | |
699 | ||
fe5fb85a MW |
700 | ;;;-------------------------------------------------------------------------- |
701 | ;;; Zone file output. | |
7e282fb5 | 702 | |
a567a3bc MW |
703 | (defgeneric zone-write (format zone stream) |
704 | (:documentation "Write ZONE's records to STREAM in the specified FORMAT.")) | |
705 | ||
706 | (defvar *writing-zone* nil | |
707 | "The zone currently being written.") | |
708 | ||
709 | (defvar *zone-output-stream* nil | |
710 | "Stream to write zone data on.") | |
711 | ||
712 | (defmethod zone-write :around (format zone stream) | |
713 | (let ((*writing-zone* zone) | |
714 | (*zone-output-stream* stream)) | |
715 | (call-next-method))) | |
716 | ||
717 | (defun zone-save (zones &key (format :bind)) | |
718 | "Write the named ZONES to files. If no zones are given, write all the | |
719 | zones." | |
720 | (unless zones | |
721 | (setf zones (hash-table-keys *zones*))) | |
722 | (safely (safe) | |
723 | (dolist (z zones) | |
724 | (let ((zz (zone-find z))) | |
725 | (unless zz | |
726 | (error "Unknown zone `~A'." z)) | |
727 | (let ((stream (safely-open-output-stream safe | |
728 | (zone-file-name z :zone)))) | |
729 | (zone-write format zz stream)))))) | |
730 | ||
731 | ;;;-------------------------------------------------------------------------- | |
732 | ;;; Bind format output. | |
733 | ||
734 | (defun bind-hostname (hostname) | |
735 | (if (not hostname) | |
736 | "@" | |
737 | (let* ((h (string-downcase (stringify hostname))) | |
738 | (hl (length h)) | |
739 | (r (string-downcase (zone-name *writing-zone*))) | |
740 | (rl (length r))) | |
741 | (cond ((string= r h) "@") | |
742 | ((and (> hl rl) | |
743 | (char= (char h (- hl rl 1)) #\.) | |
744 | (string= h r :start1 (- hl rl))) | |
745 | (subseq h 0 (- hl rl 1))) | |
746 | (t (concatenate 'string h ".")))))) | |
747 | ||
748 | (defmethod zone-write ((format (eql :bind)) zone stream) | |
749 | (format stream "~ | |
7e282fb5 | 750 | ;;; Zone file `~(~A~)' |
751 | ;;; (generated ~A) | |
752 | ||
7d593efd MW |
753 | $ORIGIN ~0@*~(~A.~) |
754 | $TTL ~2@*~D~2%" | |
7e282fb5 | 755 | (zone-name zone) |
756 | (iso-date :now :datep t :timep t) | |
757 | (zone-default-ttl zone)) | |
a567a3bc MW |
758 | (let* ((soa (zone-soa zone)) |
759 | (admin (let* ((name (soa-admin soa)) | |
760 | (at (position #\@ name)) | |
761 | (copy (format nil "~(~A~)." name))) | |
762 | (when at | |
763 | (setf (char copy at) #\.)) | |
764 | copy))) | |
7e282fb5 | 765 | (format stream "~ |
766 | ~A~30TIN SOA~40T~A ~A ( | |
767 | ~45T~10D~60T ;serial | |
768 | ~45T~10D~60T ;refresh | |
769 | ~45T~10D~60T ;retry | |
770 | ~45T~10D~60T ;expire | |
771 | ~45T~10D )~60T ;min-ttl~2%" | |
a567a3bc MW |
772 | (bind-hostname (zone-name zone)) |
773 | (bind-hostname (soa-source soa)) | |
774 | admin | |
7e282fb5 | 775 | (soa-serial soa) |
776 | (soa-refresh soa) | |
777 | (soa-retry soa) | |
778 | (soa-expire soa) | |
779 | (soa-min-ttl soa))) | |
a567a3bc MW |
780 | (dolist (zr (zone-records zone)) |
781 | (bind-record (zr-type zr) zr))) | |
782 | ||
783 | (defgeneric bind-record (type zr)) | |
784 | ||
785 | (defun bind-format-record (name ttl type format args) | |
786 | (format *zone-output-stream* | |
787 | "~A~20T~@[~8D~]~30TIN ~A~40T~?~%" | |
788 | (bind-hostname name) | |
789 | (and (/= ttl (zone-default-ttl *writing-zone*)) | |
790 | ttl) | |
791 | (string-upcase (symbol-name type)) | |
792 | format args)) | |
793 | ||
794 | (defmethod bind-record (type zr) | |
795 | (destructuring-bind (format &rest args) | |
796 | (bind-record-format-args type (zr-data zr)) | |
797 | (bind-format-record (zr-name zr) | |
798 | (zr-ttl zr) | |
799 | (bind-record-type type) | |
800 | format args))) | |
801 | ||
802 | (defgeneric bind-record-type (type) | |
803 | (:method (type) type)) | |
804 | ||
805 | (defgeneric bind-record-format-args (type data) | |
806 | (:method ((type (eql :a)) data) (list "~A" (ipaddr-string data))) | |
807 | (:method ((type (eql :ptr)) data) (list "~A" (bind-hostname data))) | |
808 | (:method ((type (eql :cname)) data) (list "~A" (bind-hostname data))) | |
809 | (:method ((type (eql :ns)) data) (list "~A" (bind-hostname data))) | |
810 | (:method ((type (eql :mx)) data) | |
811 | (list "~2D ~A" (cdr data) (bind-hostname (car data)))) | |
812 | (:method ((type (eql :txt)) data) (list "~S" (stringify data)))) | |
7e282fb5 | 813 | |
814 | ;;;----- That's all, folks -------------------------------------------------- |