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