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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 | |
32ebbe9b MW |
30 | #:net #:services) |
31 | (:import-from #:net #:round-down #:round-up)) | |
fe5fb85a | 32 | |
7e282fb5 | 33 | (in-package #:zone) |
34 | ||
fe5fb85a MW |
35 | ;;;-------------------------------------------------------------------------- |
36 | ;;; Various random utilities. | |
37 | ||
38 | (defun to-integer (x) | |
39 | "Convert X to an integer in the most straightforward way." | |
40 | (floor (rational x))) | |
41 | ||
42 | (defun from-mixed-base (base val) | |
43 | "BASE is a list of the ranges for the `digits' of a mixed-base | |
2f1d381d | 44 | representation. Convert VAL, a list of digits, into an integer." |
fe5fb85a MW |
45 | (do ((base base (cdr base)) |
46 | (val (cdr val) (cdr val)) | |
47 | (a (car val) (+ (* a (car base)) (car val)))) | |
48 | ((or (null base) (null val)) a))) | |
49 | ||
50 | (defun to-mixed-base (base val) | |
51 | "BASE is a list of the ranges for the `digits' of a mixed-base | |
2f1d381d | 52 | representation. Convert VAL, an integer, into a list of digits." |
fe5fb85a MW |
53 | (let ((base (reverse base)) |
54 | (a nil)) | |
55 | (loop | |
56 | (unless base | |
57 | (push val a) | |
58 | (return a)) | |
59 | (multiple-value-bind (q r) (floor val (pop base)) | |
60 | (push r a) | |
61 | (setf val q))))) | |
62 | ||
afa2e2f1 | 63 | (export 'timespec-seconds) |
fe5fb85a | 64 | (defun timespec-seconds (ts) |
f38bc59e MW |
65 | "Convert a timespec TS to seconds. |
66 | ||
f4e0c48f | 67 | A timespec may be a real count of seconds, or a list (COUNT UNIT). UNIT |
f38bc59e | 68 | may be any of a number of obvious time units." |
fe5fb85a MW |
69 | (cond ((null ts) 0) |
70 | ((realp ts) (floor ts)) | |
71 | ((atom ts) | |
72 | (error "Unknown timespec format ~A" ts)) | |
73 | ((null (cdr ts)) | |
74 | (timespec-seconds (car ts))) | |
75 | (t (+ (to-integer (* (car ts) | |
76 | (case (intern (string-upcase | |
77 | (stringify (cadr ts))) | |
78 | '#:zone) | |
79 | ((s sec secs second seconds) 1) | |
80 | ((m min mins minute minutes) 60) | |
81 | ((h hr hrs hour hours) #.(* 60 60)) | |
82 | ((d dy dys day days) #.(* 24 60 60)) | |
83 | ((w wk wks week weeks) #.(* 7 24 60 60)) | |
84 | ((y yr yrs year years) #.(* 365 24 60 60)) | |
85 | (t (error "Unknown time unit ~A" | |
86 | (cadr ts)))))) | |
87 | (timespec-seconds (cddr ts)))))) | |
88 | ||
89 | (defun hash-table-keys (ht) | |
90 | "Return a list of the keys in hashtable HT." | |
91 | (collecting () | |
92 | (maphash (lambda (key val) (declare (ignore val)) (collect key)) ht))) | |
93 | ||
94 | (defun iso-date (&optional time &key datep timep (sep #\ )) | |
f38bc59e MW |
95 | "Construct a textual date or time in ISO format. |
96 | ||
97 | The TIME is the universal time to convert, which defaults to now; DATEP is | |
98 | whether to emit the date; TIMEP is whether to emit the time, and | |
99 | SEP (default is space) is how to separate the two." | |
fe5fb85a MW |
100 | (multiple-value-bind |
101 | (sec min hr day mon yr dow dstp tz) | |
102 | (decode-universal-time (if (or (null time) (eq time :now)) | |
103 | (get-universal-time) | |
104 | time)) | |
105 | (declare (ignore dow dstp tz)) | |
106 | (with-output-to-string (s) | |
107 | (when datep | |
108 | (format s "~4,'0D-~2,'0D-~2,'0D" yr mon day) | |
109 | (when timep | |
110 | (write-char sep s))) | |
111 | (when timep | |
112 | (format s "~2,'0D:~2,'0D:~2,'0D" hr min sec))))) | |
113 | ||
05e83012 MW |
114 | (defun natural-string< (string1 string2 |
115 | &key (start1 0) (end1 nil) | |
116 | (start2 0) (end2 nil)) | |
117 | "Answer whether STRING1 precedes STRING2 in a vaguely natural ordering. | |
118 | ||
119 | In particular, digit sequences are handled in a moderately sensible way. | |
120 | Split the strings into maximally long alternating sequences of non-numeric | |
121 | and numeric characters, such that the non-numeric sequences are | |
122 | non-empty. Compare these lexicographically; numeric sequences order | |
123 | according to their integer values, non-numeric sequences in the usual | |
124 | lexicographic ordering. | |
125 | ||
126 | Returns two values: whether STRING1 strictly precedes STRING2, and whether | |
127 | STRING1 strictly follows STRING2." | |
128 | ||
129 | (let ((end1 (or end1 (length string1))) | |
130 | (end2 (or end2 (length string2)))) | |
131 | (loop | |
132 | (cond ((>= start1 end1) | |
133 | (let ((eqp (>= start2 end2))) | |
134 | (return (values (not eqp) nil)))) | |
135 | ((>= start2 end2) | |
136 | (return (values nil t))) | |
137 | ((and (digit-char-p (char string1 start1)) | |
138 | (digit-char-p (char string2 start2))) | |
139 | (let* ((lim1 (or (position-if-not #'digit-char-p string1 | |
140 | :start start1 :end end1) | |
141 | end1)) | |
142 | (n1 (parse-integer string1 :start start1 :end lim1)) | |
143 | (lim2 (or (position-if-not #'digit-char-p string2 | |
144 | :start start2 :end end2) | |
145 | end2)) | |
146 | (n2 (parse-integer string2 :start start2 :end lim2))) | |
147 | (cond ((< n1 n2) (return (values t nil))) | |
148 | ((> n1 n2) (return (values nil t)))) | |
149 | (setf start1 lim1 | |
150 | start2 lim2))) | |
151 | (t | |
152 | (let ((lim1 (or (position-if #'digit-char-p string1 | |
153 | :start start1 :end end1) | |
154 | end1)) | |
155 | (lim2 (or (position-if #'digit-char-p string2 | |
156 | :start start2 :end end2) | |
157 | end2))) | |
158 | (cond ((string< string1 string2 | |
159 | :start1 start1 :end1 lim1 | |
160 | :start2 start2 :end2 lim2) | |
161 | (return (values t nil))) | |
162 | ((string> string1 string2 | |
163 | :start1 start1 :end1 lim1 | |
164 | :start2 start2 :end2 lim2) | |
165 | (return (values nil t)))) | |
166 | (setf start1 lim1 | |
167 | start2 lim2))))))) | |
168 | ||
169 | (defun domain-name< (name-a name-b) | |
170 | "Answer whether NAME-A precedes NAME-B in an ordering of domain names. | |
171 | ||
172 | Split the names into labels at the dots, and then lexicographically | |
173 | compare the sequences of labels, right to left, using `natural-string<'. | |
174 | ||
175 | Returns two values: whether NAME-A strictly precedes NAME-B, and whether | |
176 | NAME-A strictly follows NAME-B." | |
177 | (let ((pos-a (length name-a)) | |
178 | (pos-b (length name-b))) | |
179 | (loop (let ((dot-a (or (position #\. name-a | |
180 | :from-end t :end pos-a) | |
181 | -1)) | |
182 | (dot-b (or (position #\. name-b | |
183 | :from-end t :end pos-b) | |
184 | -1))) | |
185 | (multiple-value-bind (precp follp) | |
186 | (natural-string< name-a name-b | |
187 | :start1 (1+ dot-a) :end1 pos-a | |
188 | :start2 (1+ dot-b) :end2 pos-b) | |
189 | (cond (precp | |
190 | (return (values t nil))) | |
191 | (follp | |
192 | (return (values nil t))) | |
193 | ((= dot-a -1) | |
194 | (let ((eqp (= dot-b -1))) | |
195 | (return (values (not eqp) nil)))) | |
196 | ((= dot-b -1) | |
197 | (return (values nil t))) | |
198 | (t | |
199 | (setf pos-a dot-a | |
200 | pos-b dot-b)))))))) | |
201 | ||
fe5fb85a MW |
202 | ;;;-------------------------------------------------------------------------- |
203 | ;;; Zone types. | |
7e282fb5 | 204 | |
afa2e2f1 | 205 | (export 'soa) |
7e282fb5 | 206 | (defstruct (soa (:predicate soap)) |
207 | "Start-of-authority record information." | |
208 | source | |
209 | admin | |
210 | refresh | |
211 | retry | |
212 | expire | |
213 | min-ttl | |
214 | serial) | |
fe5fb85a | 215 | |
afa2e2f1 | 216 | (export 'mx) |
7e282fb5 | 217 | (defstruct (mx (:predicate mxp)) |
218 | "Mail-exchange record information." | |
219 | priority | |
220 | domain) | |
fe5fb85a | 221 | |
afa2e2f1 | 222 | (export 'zone) |
7e282fb5 | 223 | (defstruct (zone (:predicate zonep)) |
224 | "Zone information." | |
225 | soa | |
226 | default-ttl | |
227 | name | |
228 | records) | |
229 | ||
fe5fb85a MW |
230 | ;;;-------------------------------------------------------------------------- |
231 | ;;; Zone defaults. It is intended that scripts override these. | |
232 | ||
afa2e2f1 | 233 | (export '*default-zone-source*) |
7e282fb5 | 234 | (defvar *default-zone-source* |
8e7c1366 | 235 | (let ((hn (gethostname))) |
8a4f9a18 | 236 | (and hn (concatenate 'string (canonify-hostname hn) "."))) |
7e282fb5 | 237 | "The default zone source: the current host's name.") |
fe5fb85a | 238 | |
afa2e2f1 | 239 | (export '*default-zone-refresh*) |
7e282fb5 | 240 | (defvar *default-zone-refresh* (* 24 60 60) |
241 | "Default zone refresh interval: one day.") | |
fe5fb85a | 242 | |
afa2e2f1 | 243 | (export '*default-zone-admin*) |
7e282fb5 | 244 | (defvar *default-zone-admin* nil |
245 | "Default zone administrator's email address.") | |
fe5fb85a | 246 | |
afa2e2f1 | 247 | (export '*default-zone-retry*) |
7e282fb5 | 248 | (defvar *default-zone-retry* (* 60 60) |
249 | "Default znoe retry interval: one hour.") | |
fe5fb85a | 250 | |
afa2e2f1 | 251 | (export '*default-zone-expire*) |
7e282fb5 | 252 | (defvar *default-zone-expire* (* 14 24 60 60) |
253 | "Default zone expiry time: two weeks.") | |
fe5fb85a | 254 | |
afa2e2f1 | 255 | (export '*default-zone-min-ttl*) |
7e282fb5 | 256 | (defvar *default-zone-min-ttl* (* 4 60 60) |
257 | "Default zone minimum TTL/negative TTL: four hours.") | |
fe5fb85a | 258 | |
afa2e2f1 | 259 | (export '*default-zone-ttl*) |
7e282fb5 | 260 | (defvar *default-zone-ttl* (* 8 60 60) |
261 | "Default zone TTL (for records without explicit TTLs): 8 hours.") | |
fe5fb85a | 262 | |
afa2e2f1 | 263 | (export '*default-mx-priority*) |
7e282fb5 | 264 | (defvar *default-mx-priority* 50 |
265 | "Default MX priority.") | |
266 | ||
fe5fb85a MW |
267 | ;;;-------------------------------------------------------------------------- |
268 | ;;; Zone variables and structures. | |
269 | ||
7e282fb5 | 270 | (defvar *zones* (make-hash-table :test #'equal) |
271 | "Map of known zones.") | |
fe5fb85a | 272 | |
afa2e2f1 | 273 | (export 'zone-find) |
7e282fb5 | 274 | (defun zone-find (name) |
275 | "Find a zone given its NAME." | |
276 | (gethash (string-downcase (stringify name)) *zones*)) | |
277 | (defun (setf zone-find) (zone name) | |
278 | "Make the zone NAME map to ZONE." | |
279 | (setf (gethash (string-downcase (stringify name)) *zones*) zone)) | |
280 | ||
afa2e2f1 | 281 | (export 'zone-record) |
7e282fb5 | 282 | (defstruct (zone-record (:conc-name zr-)) |
283 | "A zone record." | |
284 | (name '<unnamed>) | |
285 | ttl | |
286 | type | |
590ad961 | 287 | (make-ptr-p nil) |
7e282fb5 | 288 | data) |
289 | ||
afa2e2f1 | 290 | (export 'zone-subdomain) |
7e282fb5 | 291 | (defstruct (zone-subdomain (:conc-name zs-)) |
f4e0c48f MW |
292 | "A subdomain. |
293 | ||
294 | Slightly weird. Used internally by `zone-process-records', and shouldn't | |
295 | escape." | |
7e282fb5 | 296 | name |
297 | ttl | |
298 | records) | |
299 | ||
afa2e2f1 | 300 | (export '*zone-output-path*) |
3d7852d9 MW |
301 | (defvar *zone-output-path* nil |
302 | "Pathname defaults to merge into output files. | |
303 | ||
304 | If this is nil then use the prevailing `*default-pathname-defaults*'. | |
305 | This is not the same as capturing the `*default-pathname-defaults*' from | |
306 | load time.") | |
ab87c7bf | 307 | |
afa2e2f1 | 308 | (export '*preferred-subnets*) |
8ce7eb9b MW |
309 | (defvar *preferred-subnets* nil |
310 | "Subnets to prefer when selecting defaults.") | |
311 | ||
fe5fb85a MW |
312 | ;;;-------------------------------------------------------------------------- |
313 | ;;; Zone infrastructure. | |
314 | ||
ab87c7bf MW |
315 | (defun zone-file-name (zone type) |
316 | "Choose a file name for a given ZONE and TYPE." | |
317 | (merge-pathnames (make-pathname :name (string-downcase zone) | |
318 | :type (string-downcase type)) | |
3d7852d9 | 319 | (or *zone-output-path* *default-pathname-defaults*))) |
ab87c7bf | 320 | |
afa2e2f1 | 321 | (export 'zone-preferred-subnet-p) |
8ce7eb9b MW |
322 | (defun zone-preferred-subnet-p (name) |
323 | "Answer whether NAME (a string or symbol) names a preferred subnet." | |
324 | (member name *preferred-subnets* :test #'string-equal)) | |
325 | ||
afa2e2f1 | 326 | (export 'preferred-subnet-case) |
8bd2576e | 327 | (defmacro preferred-subnet-case (&body clauses) |
f4e0c48f | 328 | "Execute a form based on which networks are considered preferred. |
f38bc59e | 329 | |
f4e0c48f MW |
330 | The CLAUSES have the form (SUBNETS . FORMS) -- evaluate the first FORMS |
331 | whose SUBNETS (a list or single symbol, not evaluated) are listed in | |
332 | `*preferred-subnets*'. If SUBNETS is the symbol `t' then the clause | |
333 | always matches." | |
8bd2576e MW |
334 | `(cond |
335 | ,@(mapcar (lambda (clause) | |
336 | (let ((subnets (car clause))) | |
337 | (cons (cond ((eq subnets t) | |
338 | t) | |
339 | ((listp subnets) | |
340 | `(or ,@(mapcar (lambda (subnet) | |
341 | `(zone-preferred-subnet-p | |
342 | ',subnet)) | |
343 | subnets))) | |
344 | (t | |
345 | `(zone-preferred-subnet-p ',subnets))) | |
346 | (cdr clause)))) | |
347 | clauses))) | |
348 | ||
32ebbe9b MW |
349 | (export 'zone-parse-host) |
350 | (defun zone-parse-host (f zname) | |
351 | "Parse a host name F. | |
352 | ||
353 | If F ends in a dot then it's considered absolute; otherwise it's relative | |
354 | to ZNAME." | |
355 | (setf f (stringify f)) | |
356 | (cond ((string= f "@") (stringify zname)) | |
357 | ((and (plusp (length f)) | |
358 | (char= (char f (1- (length f))) #\.)) | |
359 | (string-downcase (subseq f 0 (1- (length f))))) | |
360 | (t (string-downcase (concatenate 'string f "." | |
361 | (stringify zname)))))) | |
362 | ||
363 | (export 'zone-make-name) | |
364 | (defun zone-make-name (prefix zone-name) | |
365 | "Compute a full domain name from a PREFIX and a ZONE-NAME. | |
366 | ||
367 | If the PREFIX ends with `.' then it's absolute already; otherwise, append | |
368 | the ZONE-NAME, separated with a `.'. If PREFIX is nil, or `@', then | |
369 | return the ZONE-NAME only." | |
370 | (if (or (not prefix) (string= prefix "@")) | |
371 | zone-name | |
372 | (let ((len (length prefix))) | |
373 | (if (or (zerop len) (char/= (char prefix (1- len)) #\.)) | |
374 | (join-strings #\. (list prefix zone-name)) | |
375 | prefix)))) | |
376 | ||
aac45ff7 MW |
377 | (export 'zone-records-sorted) |
378 | (defun zone-records-sorted (zone) | |
379 | "Return the ZONE's records, in a pleasant sorted order." | |
380 | (sort (copy-seq (zone-records zone)) | |
381 | (lambda (zr-a zr-b) | |
05e83012 MW |
382 | (multiple-value-bind (precp follp) |
383 | (domain-name< (zr-name zr-a) (zr-name zr-b)) | |
384 | (cond (precp t) | |
385 | (follp nil) | |
386 | (t (string< (zr-type zr-a) (zr-type zr-b)))))))) | |
aac45ff7 | 387 | |
32ebbe9b MW |
388 | ;;;-------------------------------------------------------------------------- |
389 | ;;; Serial numbering. | |
390 | ||
391 | (export 'make-zone-serial) | |
392 | (defun make-zone-serial (name) | |
393 | "Given a zone NAME, come up with a new serial number. | |
394 | ||
395 | This will (very carefully) update a file ZONE.serial in the current | |
396 | directory." | |
397 | (let* ((file (zone-file-name name :serial)) | |
398 | (last (with-open-file (in file | |
399 | :direction :input | |
400 | :if-does-not-exist nil) | |
401 | (if in (read in) | |
402 | (list 0 0 0 0)))) | |
403 | (now (multiple-value-bind | |
404 | (sec min hr dy mon yr dow dstp tz) | |
405 | (get-decoded-time) | |
406 | (declare (ignore sec min hr dow dstp tz)) | |
407 | (list dy mon yr))) | |
408 | (seq (cond ((not (equal now (cdr last))) 0) | |
409 | ((< (car last) 99) (1+ (car last))) | |
410 | (t (error "Run out of sequence numbers for ~A" name))))) | |
411 | (safely-writing (out file) | |
412 | (format out | |
413 | ";; Serial number file for zone ~A~%~ | |
414 | ;; (LAST-SEQ DAY MONTH YEAR)~%~ | |
415 | ~S~%" | |
416 | name | |
417 | (cons seq now))) | |
418 | (from-mixed-base '(100 100 100) (reverse (cons seq now))))) | |
419 | ||
420 | ;;;-------------------------------------------------------------------------- | |
421 | ;;; Zone form parsing. | |
422 | ||
7e282fb5 | 423 | (defun zone-process-records (rec ttl func) |
f38bc59e MW |
424 | "Sort out the list of records in REC, calling FUNC for each one. |
425 | ||
baad8564 MW |
426 | TTL is the default time-to-live for records which don't specify one. |
427 | ||
f4e0c48f MW |
428 | REC is a list of records of the form |
429 | ||
430 | ({ :ttl TTL | TYPE DATA | (LABEL . REC) }*) | |
431 | ||
432 | The various kinds of entries have the following meanings. | |
433 | ||
434 | :ttl TTL Set the TTL for subsequent records (at this level of | |
435 | nesting only). | |
436 | ||
437 | TYPE DATA Define a record with a particular TYPE and DATA. | |
438 | Record types are defined using `defzoneparse' and | |
439 | the syntax of the data is idiosyncratic. | |
440 | ||
441 | ((LABEL ...) . REC) Define records for labels within the zone. Any | |
442 | records defined within REC will have their domains | |
443 | prefixed by each of the LABELs. A singleton list | |
444 | of labels may instead be written as a single | |
445 | label. Note, therefore, that | |
446 | ||
447 | (host (sub :a \"169.254.1.1\")) | |
baad8564 | 448 | |
f4e0c48f | 449 | defines a record for `host.sub' -- not `sub.host'. |
baad8564 | 450 | |
f4e0c48f MW |
451 | If REC contains no top-level records, but it does define records for a |
452 | label listed in `*preferred-subnets*', then the records for the first such | |
453 | label are also promoted to top-level. | |
baad8564 | 454 | |
f4e0c48f MW |
455 | The FUNC is called for each record encountered, represented as a |
456 | `zone-record' object. Zone parsers are not called: you get the record | |
457 | types and data from the input form; see `zone-parse-records' if you want | |
458 | the raw output." | |
baad8564 | 459 | |
7e282fb5 | 460 | (labels ((sift (rec ttl) |
f4e0c48f MW |
461 | ;; Parse the record list REC into lists of `zone-record' and |
462 | ;; `zone-subdomain' objects, sorting out TTLs and so on. | |
463 | ;; Returns them as two values. | |
464 | ||
7e282fb5 | 465 | (collecting (top sub) |
466 | (loop | |
467 | (unless rec | |
468 | (return)) | |
469 | (let ((r (pop rec))) | |
470 | (cond ((eq r :ttl) | |
471 | (setf ttl (pop rec))) | |
472 | ((symbolp r) | |
473 | (collect (make-zone-record :type r | |
474 | :ttl ttl | |
475 | :data (pop rec)) | |
476 | top)) | |
477 | ((listp r) | |
478 | (dolist (name (listify (car r))) | |
479 | (collect (make-zone-subdomain :name name | |
480 | :ttl ttl | |
481 | :records (cdr r)) | |
482 | sub))) | |
483 | (t | |
484 | (error "Unexpected record form ~A" (car r)))))))) | |
f4e0c48f | 485 | |
4e7e3780 | 486 | (process (rec dom ttl) |
f4e0c48f MW |
487 | ;; Recursirvely process the record list REC, with a list DOM of |
488 | ;; prefix labels, and a default TTL. Promote records for a | |
489 | ;; preferred subnet to toplevel if there are no toplevel records | |
490 | ;; already. | |
491 | ||
7e282fb5 | 492 | (multiple-value-bind (top sub) (sift rec ttl) |
493 | (if (and dom (null top) sub) | |
64e34a97 MW |
494 | (let ((preferred |
495 | (or (find-if (lambda (s) | |
496 | (some #'zone-preferred-subnet-p | |
497 | (listify (zs-name s)))) | |
498 | sub) | |
499 | (car sub)))) | |
8ce7eb9b MW |
500 | (when preferred |
501 | (process (zs-records preferred) | |
502 | dom | |
503 | (zs-ttl preferred)))) | |
504 | (let ((name (and dom | |
505 | (string-downcase | |
506 | (join-strings #\. (reverse dom)))))) | |
507 | (dolist (zr top) | |
508 | (setf (zr-name zr) name) | |
509 | (funcall func zr)))) | |
7e282fb5 | 510 | (dolist (s sub) |
511 | (process (zs-records s) | |
512 | (cons (zs-name s) dom) | |
4e7e3780 | 513 | (zs-ttl s)))))) |
f4e0c48f MW |
514 | |
515 | ;; Process the records we're given with no prefix. | |
4e7e3780 | 516 | (process rec nil ttl))) |
7e282fb5 | 517 | |
7e282fb5 | 518 | (defun zone-parse-head (head) |
f38bc59e MW |
519 | "Parse the HEAD of a zone form. |
520 | ||
521 | This has the form | |
7e282fb5 | 522 | |
523 | (NAME &key :source :admin :refresh :retry | |
b23c65ee | 524 | :expire :min-ttl :ttl :serial) |
7e282fb5 | 525 | |
2f1d381d MW |
526 | though a singleton NAME needn't be a list. Returns the default TTL and an |
527 | soa structure representing the zone head." | |
7e282fb5 | 528 | (destructuring-bind |
529 | (zname | |
530 | &key | |
8a4f9a18 | 531 | (source *default-zone-source*) |
7e282fb5 | 532 | (admin (or *default-zone-admin* |
533 | (format nil "hostmaster@~A" zname))) | |
534 | (refresh *default-zone-refresh*) | |
535 | (retry *default-zone-retry*) | |
536 | (expire *default-zone-expire*) | |
537 | (min-ttl *default-zone-min-ttl*) | |
538 | (ttl min-ttl) | |
539 | (serial (make-zone-serial zname))) | |
540 | (listify head) | |
babb8dd2 | 541 | (values (string-downcase zname) |
7e282fb5 | 542 | (timespec-seconds ttl) |
543 | (make-soa :admin admin | |
544 | :source (zone-parse-host source zname) | |
545 | :refresh (timespec-seconds refresh) | |
546 | :retry (timespec-seconds retry) | |
547 | :expire (timespec-seconds expire) | |
548 | :min-ttl (timespec-seconds min-ttl) | |
549 | :serial serial)))) | |
550 | ||
afa2e2f1 | 551 | (export 'defzoneparse) |
7e282fb5 | 552 | (defmacro defzoneparse (types (name data list |
5bf80328 | 553 | &key (prefix (gensym "PREFIX")) |
b23c65ee MW |
554 | (zname (gensym "ZNAME")) |
555 | (ttl (gensym "TTL"))) | |
7e282fb5 | 556 | &body body) |
f38bc59e MW |
557 | "Define a new zone record type. |
558 | ||
f4e0c48f MW |
559 | The arguments are as follows: |
560 | ||
561 | TYPES A singleton type symbol, or a list of aliases. | |
fe5fb85a | 562 | |
2f1d381d | 563 | NAME The name of the record to be added. |
fe5fb85a | 564 | |
2f1d381d | 565 | DATA The content of the record to be added (a single object, |
7fff3797 | 566 | unevaluated). |
fe5fb85a | 567 | |
2f1d381d | 568 | LIST A function to add a record to the zone. See below. |
fe5fb85a | 569 | |
5bf80328 MW |
570 | PREFIX The prefix tag used in the original form. |
571 | ||
2f1d381d | 572 | ZNAME The name of the zone being constructed. |
fe5fb85a | 573 | |
2f1d381d | 574 | TTL The TTL for this record. |
fe5fb85a | 575 | |
5bf80328 MW |
576 | You get to choose your own names for these. ZNAME, PREFIX and TTL are |
577 | optional: you don't have to accept them if you're not interested. | |
fe5fb85a | 578 | |
2f1d381d MW |
579 | The LIST argument names a function to be bound in the body to add a new |
580 | low-level record to the zone. It has the prototype | |
fe5fb85a | 581 | |
590ad961 | 582 | (LIST &key :name :type :data :ttl :make-ptr-p) |
fe5fb85a | 583 | |
590ad961 MW |
584 | These (except MAKE-PTR-P, which defaults to nil) default to the above |
585 | arguments (even if you didn't accept the arguments)." | |
7e282fb5 | 586 | (setf types (listify types)) |
587 | (let* ((type (car types)) | |
588 | (func (intern (format nil "ZONE-PARSE/~:@(~A~)" type)))) | |
2ec279f5 | 589 | (with-parsed-body (body decls doc) body |
590ad961 | 590 | (with-gensyms (col tname ttype tttl tdata tmakeptrp i) |
40ded1b8 MW |
591 | `(progn |
592 | (dolist (,i ',types) | |
593 | (setf (get ,i 'zone-parse) ',func)) | |
5bf80328 | 594 | (defun ,func (,prefix ,zname ,data ,ttl ,col) |
40ded1b8 MW |
595 | ,@doc |
596 | ,@decls | |
5bf80328 MW |
597 | (let ((,name (zone-make-name ,prefix ,zname))) |
598 | (flet ((,list (&key ((:name ,tname) ,name) | |
599 | ((:type ,ttype) ,type) | |
600 | ((:data ,tdata) ,data) | |
590ad961 MW |
601 | ((:ttl ,tttl) ,ttl) |
602 | ((:make-ptr-p ,tmakeptrp) nil)) | |
f4decf40 | 603 | #+cmu (declare (optimize ext:inhibit-warnings)) |
5bf80328 MW |
604 | (collect (make-zone-record :name ,tname |
605 | :type ,ttype | |
606 | :data ,tdata | |
590ad961 MW |
607 | :ttl ,tttl |
608 | :make-ptr-p ,tmakeptrp) | |
5bf80328 MW |
609 | ,col))) |
610 | ,@body))) | |
f4e0c48f | 611 | ',type))))) |
7e282fb5 | 612 | |
8fcf1ae3 MW |
613 | (export 'zone-parse-records) |
614 | (defun zone-parse-records (zname ttl records) | |
615 | "Parse a sequence of RECORDS and return a list of raw records. | |
616 | ||
617 | The records are parsed relative to the zone name ZNAME, and using the | |
618 | given default TTL." | |
619 | (collecting (rec) | |
620 | (flet ((parse-record (zr) | |
621 | (let ((func (or (get (zr-type zr) 'zone-parse) | |
622 | (error "No parser for record ~A." | |
623 | (zr-type zr)))) | |
624 | (name (and (zr-name zr) (stringify (zr-name zr))))) | |
625 | (funcall func name zname (zr-data zr) (zr-ttl zr) rec)))) | |
626 | (zone-process-records records ttl #'parse-record)))) | |
7e282fb5 | 627 | |
afa2e2f1 | 628 | (export 'zone-parse) |
7e282fb5 | 629 | (defun zone-parse (zf) |
f38bc59e MW |
630 | "Parse a ZONE form. |
631 | ||
f4e0c48f | 632 | The syntax of a zone form is as follows: |
7e282fb5 | 633 | |
2f1d381d MW |
634 | ZONE-FORM: |
635 | ZONE-HEAD ZONE-RECORD* | |
7e282fb5 | 636 | |
2f1d381d MW |
637 | ZONE-RECORD: |
638 | ((NAME*) ZONE-RECORD*) | |
639 | | SYM ARGS" | |
7e282fb5 | 640 | (multiple-value-bind (zname ttl soa) (zone-parse-head (car zf)) |
8fcf1ae3 MW |
641 | (make-zone :name zname |
642 | :default-ttl ttl | |
643 | :soa soa | |
644 | :records (zone-parse-records zname ttl (cdr zf))))) | |
7e282fb5 | 645 | |
afa2e2f1 | 646 | (export 'zone-create) |
fe5fb85a MW |
647 | (defun zone-create (zf) |
648 | "Zone construction function. Given a zone form ZF, construct the zone and | |
2f1d381d | 649 | add it to the table." |
fe5fb85a MW |
650 | (let* ((zone (zone-parse zf)) |
651 | (name (zone-name zone))) | |
652 | (setf (zone-find name) zone) | |
653 | name)) | |
654 | ||
afa2e2f1 | 655 | (export 'defzone) |
32ebbe9b | 656 | (defmacro defzone (soa &body zf) |
fe5fb85a MW |
657 | "Zone definition macro." |
658 | `(zone-create '(,soa ,@zf))) | |
659 | ||
32ebbe9b MW |
660 | (export '*address-family*) |
661 | (defvar *address-family* t | |
662 | "The default address family. This is bound by `defrevzone'.") | |
663 | ||
afa2e2f1 | 664 | (export 'defrevzone) |
32ebbe9b | 665 | (defmacro defrevzone (head &body zf) |
fe5fb85a | 666 | "Define a reverse zone, with the correct name." |
32ebbe9b MW |
667 | (destructuring-bind (nets &rest args |
668 | &key &allow-other-keys | |
669 | (family '*address-family*) | |
670 | prefix-bits) | |
fe5fb85a | 671 | (listify head) |
32ebbe9b MW |
672 | (with-gensyms (ipn) |
673 | `(dolist (,ipn (net-parse-to-ipnets ',nets ,family)) | |
674 | (let ((*address-family* (ipnet-family ,ipn))) | |
675 | (zone-create `((,(reverse-domain ,ipn ,prefix-bits) | |
676 | ,@',(loop for (k v) on args by #'cddr | |
677 | unless (member k | |
678 | '(:family :prefix-bits)) | |
679 | nconc (list k v))) | |
680 | ,@',zf))))))) | |
681 | ||
7c34d08c | 682 | (export 'map-host-addresses) |
32ebbe9b MW |
683 | (defun map-host-addresses (func addr &key (family *address-family*)) |
684 | "Call FUNC for each address denoted by ADDR (a `host-parse' address)." | |
685 | ||
686 | (dolist (a (host-addrs (host-parse addr family))) | |
687 | (funcall func a))) | |
688 | ||
7c34d08c | 689 | (export 'do-host) |
32ebbe9b MW |
690 | (defmacro do-host ((addr spec &key (family *address-family*)) &body body) |
691 | "Evaluate BODY, binding ADDR to each address denoted by SPEC." | |
692 | `(dolist (,addr (host-addrs (host-parse ,spec ,family))) | |
693 | ,@body)) | |
694 | ||
695 | (export 'zone-set-address) | |
696 | (defun zone-set-address (rec addrspec &rest args | |
697 | &key (family *address-family*) name ttl make-ptr-p) | |
698 | "Write records (using REC) defining addresses for ADDRSPEC." | |
699 | (declare (ignore name ttl make-ptr-p)) | |
700 | (let ((key-args (loop for (k v) on args by #'cddr | |
701 | unless (eq k :family) | |
702 | nconc (list k v)))) | |
703 | (do-host (addr addrspec :family family) | |
704 | (apply rec :type (ipaddr-rrtype addr) :data addr key-args)))) | |
fe5fb85a | 705 | |
9f408c60 MW |
706 | ;;;-------------------------------------------------------------------------- |
707 | ;;; Building raw record vectors. | |
708 | ||
709 | (defvar *record-vector* nil | |
710 | "The record vector under construction.") | |
711 | ||
712 | (defun rec-ensure (n) | |
713 | "Ensure that at least N octets are spare in the current record." | |
714 | (let ((want (+ n (fill-pointer *record-vector*))) | |
715 | (have (array-dimension *record-vector* 0))) | |
716 | (unless (<= want have) | |
717 | (adjust-array *record-vector* | |
718 | (do ((new (* 2 have) (* 2 new))) | |
719 | ((<= want new) new)))))) | |
720 | ||
721 | (export 'rec-byte) | |
722 | (defun rec-byte (octets value) | |
723 | "Append an unsigned byte, OCTETS octets wide, with VALUE, to the record." | |
724 | (rec-ensure octets) | |
725 | (do ((i (1- octets) (1- i))) | |
726 | ((minusp i)) | |
727 | (vector-push (ldb (byte 8 (* 8 i)) value) *record-vector*))) | |
728 | ||
729 | (export 'rec-u8) | |
730 | (defun rec-u8 (value) | |
731 | "Append an 8-bit VALUE to the current record." | |
732 | (rec-byte 1 value)) | |
733 | ||
734 | (export 'rec-u16) | |
735 | (defun rec-u16 (value) | |
736 | "Append a 16-bit VALUE to the current record." | |
737 | (rec-byte 2 value)) | |
738 | ||
739 | (export 'rec-u32) | |
740 | (defun rec-u32 (value) | |
741 | "Append a 32-bit VALUE to the current record." | |
742 | (rec-byte 4 value)) | |
743 | ||
744 | (export 'rec-raw-string) | |
745 | (defun rec-raw-string (s &key (start 0) end) | |
746 | "Append (a (substring of) a raw string S to the current record. | |
747 | ||
748 | No arrangement is made for reporting the length of the string. That must | |
749 | be done by the caller, if necessary." | |
750 | (setf-default end (length s)) | |
751 | (rec-ensure (- end start)) | |
752 | (do ((i start (1+ i))) | |
753 | ((>= i end)) | |
754 | (vector-push (char-code (char s i)) *record-vector*))) | |
755 | ||
756 | (export 'rec-string) | |
757 | (defun rec-string (s &key (start 0) end (max 255)) | |
758 | (let* ((end (or end (length s))) | |
759 | (len (- end start))) | |
760 | (unless (<= len max) | |
761 | (error "String `~A' too long" (subseq s start end))) | |
762 | (rec-u8 (- end start)) | |
763 | (rec-raw-string s :start start :end end))) | |
764 | ||
765 | (export 'rec-name) | |
766 | (defun rec-name (s) | |
767 | "Append a domain name S. | |
768 | ||
769 | No attempt is made to perform compression of the name." | |
770 | (let ((i 0) (n (length s))) | |
771 | (loop (let* ((dot (position #\. s :start i)) | |
772 | (lim (or dot n))) | |
773 | (rec-string s :start i :end lim :max 63) | |
774 | (if dot | |
775 | (setf i (1+ dot)) | |
776 | (return)))) | |
777 | (when (< i n) | |
778 | (rec-u8 0)))) | |
779 | ||
780 | (export 'build-record) | |
781 | (defmacro build-record (&body body) | |
782 | "Build a raw record, and return it as a vector of octets." | |
783 | `(let ((*record-vector* (make-array 256 | |
784 | :element-type '(unsigned-byte 8) | |
785 | :fill-pointer 0 | |
786 | :adjustable t))) | |
787 | ,@body | |
788 | (copy-seq *record-vector*))) | |
789 | ||
790 | (export 'zone-record-rrdata) | |
791 | (defgeneric zone-record-rrdata (type zr) | |
792 | (:documentation "Emit (using the `build-record' protocol) RRDATA for ZR. | |
793 | ||
794 | The TYPE is a keyword naming the record type. Return the numeric RRTYPE | |
795 | code.")) | |
796 | ||
fe5fb85a MW |
797 | ;;;-------------------------------------------------------------------------- |
798 | ;;; Zone record parsers. | |
799 | ||
4e7e3780 | 800 | (defzoneparse :a (name data rec) |
7e282fb5 | 801 | ":a IPADDR" |
32ebbe9b MW |
802 | (zone-set-address #'rec data :make-ptr-p t :family :ipv4)) |
803 | ||
9f408c60 MW |
804 | (defmethod zone-record-rrdata ((type (eql :a)) zr) |
805 | (rec-u32 (ipaddr-addr (zr-data zr))) | |
806 | 1) | |
807 | ||
a2267e14 MW |
808 | (defzoneparse :aaaa (name data rec) |
809 | ":aaaa IPADDR" | |
810 | (zone-set-address #'rec data :make-ptr-p t :family :ipv6)) | |
811 | ||
9f408c60 MW |
812 | (defmethod zone-record-rrdata ((type (eql :aaaa)) zr) |
813 | (rec-byte 16 (ipaddr-addr (zr-data zr))) | |
814 | 28) | |
815 | ||
32ebbe9b MW |
816 | (defzoneparse :addr (name data rec) |
817 | ":addr IPADDR" | |
818 | (zone-set-address #'rec data :make-ptr-p t)) | |
590ad961 MW |
819 | |
820 | (defzoneparse :svc (name data rec) | |
821 | ":svc IPADDR" | |
32ebbe9b | 822 | (zone-set-address #'rec data)) |
fe5fb85a | 823 | |
7e282fb5 | 824 | (defzoneparse :ptr (name data rec :zname zname) |
825 | ":ptr HOST" | |
826 | (rec :data (zone-parse-host data zname))) | |
fe5fb85a | 827 | |
9f408c60 MW |
828 | (defmethod zone-record-rrdata ((type (eql :ptr)) zr) |
829 | (rec-name (zr-data zr)) | |
830 | 12) | |
831 | ||
7e282fb5 | 832 | (defzoneparse :cname (name data rec :zname zname) |
833 | ":cname HOST" | |
834 | (rec :data (zone-parse-host data zname))) | |
fe5fb85a | 835 | |
9f408c60 MW |
836 | (defmethod zone-record-rrdata ((type (eql :cname)) zr) |
837 | (rec-name (zr-data zr)) | |
838 | 5) | |
839 | ||
90022a23 | 840 | (defzoneparse :txt (name data rec) |
4ea82aba MW |
841 | ":txt (TEXT*)" |
842 | (rec :data (listify data))) | |
90022a23 | 843 | |
9f408c60 MW |
844 | (defmethod zone-record-rrdata ((type (eql :txt)) zr) |
845 | (mapc #'rec-string (zr-data zr)) | |
846 | 16) | |
847 | ||
f760c73a MW |
848 | (export '*dkim-pathname-defaults*) |
849 | (defvar *dkim-pathname-defaults* | |
850 | (make-pathname :directory '(:relative "keys") | |
851 | :type "dkim")) | |
852 | ||
75f39e1a MW |
853 | (defzoneparse :dkim (name data rec) |
854 | ":dkim (KEYFILE {:TAG VALUE}*)" | |
855 | (destructuring-bind (file &rest plist) (listify data) | |
856 | (let ((things nil) (out nil)) | |
857 | (labels ((flush () | |
858 | (when out | |
859 | (push (get-output-stream-string out) things) | |
860 | (setf out nil))) | |
861 | (emit (text) | |
862 | (let ((len (length text))) | |
863 | (when (and out (> (+ (file-position out) | |
864 | (length text)) | |
865 | 64)) | |
866 | (flush)) | |
867 | (when (plusp len) | |
868 | (cond ((< len 64) | |
869 | (unless out (setf out (make-string-output-stream))) | |
870 | (write-string text out)) | |
871 | (t | |
872 | (do ((i 0 j) | |
873 | (j 64 (+ j 64))) | |
874 | ((>= i len)) | |
875 | (push (subseq text i (min j len)) things)))))))) | |
876 | (do ((p plist (cddr p))) | |
877 | ((endp p)) | |
878 | (emit (format nil "~(~A~)=~A;" (car p) (cadr p)))) | |
879 | (emit (with-output-to-string (out) | |
880 | (write-string "p=" out) | |
881 | (when file | |
f760c73a MW |
882 | (with-open-file |
883 | (in (merge-pathnames file *dkim-pathname-defaults*)) | |
75f39e1a MW |
884 | (loop |
885 | (when (string= (read-line in) | |
886 | "-----BEGIN PUBLIC KEY-----") | |
887 | (return))) | |
888 | (loop | |
889 | (let ((line (read-line in))) | |
890 | (if (string= line "-----END PUBLIC KEY-----") | |
891 | (return) | |
892 | (write-string line out))))))))) | |
893 | (rec :type :txt | |
894 | :data (nreverse things))))) | |
895 | ||
f1d7d492 MW |
896 | (eval-when (:load-toplevel :execute) |
897 | (dolist (item '((sshfp-algorithm rsa 1) | |
898 | (sshfp-algorithm dsa 2) | |
899 | (sshfp-algorithm ecdsa 3) | |
900 | (sshfp-type sha-1 1) | |
901 | (sshfp-type sha-256 2))) | |
902 | (destructuring-bind (prop sym val) item | |
903 | (setf (get sym prop) val) | |
904 | (export sym)))) | |
905 | ||
f760c73a MW |
906 | (export '*sshfp-pathname-defaults*) |
907 | (defvar *sshfp-pathname-defaults* | |
908 | (make-pathname :directory '(:relative "keys") | |
909 | :type "sshfp")) | |
910 | ||
f1d7d492 MW |
911 | (defzoneparse :sshfp (name data rec) |
912 | ":sshfp { FILENAME | ((FPR :alg ALG :type HASH)*) }" | |
913 | (if (stringp data) | |
f760c73a | 914 | (with-open-file (in (merge-pathnames data *sshfp-pathname-defaults*)) |
f1d7d492 MW |
915 | (loop (let ((line (read-line in nil))) |
916 | (unless line (return)) | |
917 | (let ((words (str-split-words line))) | |
918 | (pop words) | |
919 | (when (string= (car words) "IN") (pop words)) | |
920 | (unless (and (string= (car words) "SSHFP") | |
921 | (= (length words) 4)) | |
922 | (error "Invalid SSHFP record.")) | |
923 | (pop words) | |
924 | (destructuring-bind (alg type fpr) words | |
925 | (rec :data (list (parse-integer alg) | |
926 | (parse-integer type) | |
927 | fpr))))))) | |
928 | (flet ((lookup (what prop) | |
929 | (etypecase what | |
930 | (fixnum what) | |
931 | (symbol (or (get what prop) | |
932 | (error "~S is not a known ~A" what prop)))))) | |
48608192 MW |
933 | (dolist (item (listify data)) |
934 | (destructuring-bind (fpr &key (alg 'rsa) (type 'sha-1)) | |
935 | (listify item) | |
936 | (rec :data (list (lookup alg 'sshfp-algorithm) | |
937 | (lookup type 'sshfp-type) | |
938 | fpr))))))) | |
f1d7d492 | 939 | |
9f408c60 MW |
940 | (defmethod zone-record-rrdata ((type (eql :sshfp)) zr) |
941 | (destructuring-bind (alg type fpr) (zr-data zr) | |
942 | (rec-u8 alg) | |
943 | (rec-u8 type) | |
944 | (do ((i 0 (+ i 2)) | |
945 | (n (length fpr))) | |
946 | ((>= i n)) | |
947 | (rec-u8 (parse-integer fpr :start i :end (+ i 2) :radix 16)))) | |
948 | 44) | |
949 | ||
7e282fb5 | 950 | (defzoneparse :mx (name data rec :zname zname) |
951 | ":mx ((HOST :prio INT :ip IPADDR)*)" | |
952 | (dolist (mx (listify data)) | |
953 | (destructuring-bind | |
954 | (mxname &key (prio *default-mx-priority*) ip) | |
955 | (listify mx) | |
956 | (let ((host (zone-parse-host mxname zname))) | |
32ebbe9b | 957 | (when ip (zone-set-address #'rec ip :name host)) |
7e282fb5 | 958 | (rec :data (cons host prio)))))) |
fe5fb85a | 959 | |
9f408c60 MW |
960 | (defmethod zone-record-rrdata ((type (eql :mx)) zr) |
961 | (let ((name (car (zr-data zr))) | |
962 | (prio (cdr (zr-data zr)))) | |
963 | (rec-u16 prio) | |
964 | (rec-name name)) | |
965 | 15) | |
966 | ||
7e282fb5 | 967 | (defzoneparse :ns (name data rec :zname zname) |
968 | ":ns ((HOST :ip IPADDR)*)" | |
969 | (dolist (ns (listify data)) | |
970 | (destructuring-bind | |
971 | (nsname &key ip) | |
972 | (listify ns) | |
973 | (let ((host (zone-parse-host nsname zname))) | |
32ebbe9b | 974 | (when ip (zone-set-address #'rec ip :name host)) |
7e282fb5 | 975 | (rec :data host))))) |
fe5fb85a | 976 | |
9f408c60 MW |
977 | (defmethod zone-record-rrdata ((type (eql :ns)) zr) |
978 | (rec-name (zr-data zr)) | |
979 | 2) | |
980 | ||
7e282fb5 | 981 | (defzoneparse :alias (name data rec :zname zname) |
982 | ":alias (LABEL*)" | |
983 | (dolist (a (listify data)) | |
984 | (rec :name (zone-parse-host a zname) | |
985 | :type :cname | |
986 | :data name))) | |
fe5fb85a | 987 | |
716105aa MW |
988 | (defzoneparse :srv (name data rec :zname zname) |
989 | ":srv (((SERVICE &key :port) (PROVIDER &key :port :prio :weight :ip)*)*)" | |
990 | (dolist (srv data) | |
991 | (destructuring-bind (servopts &rest providers) srv | |
992 | (destructuring-bind | |
993 | (service &key ((:port default-port)) (protocol :tcp)) | |
994 | (listify servopts) | |
995 | (unless default-port | |
996 | (let ((serv (serv-by-name service protocol))) | |
997 | (setf default-port (and serv (serv-port serv))))) | |
998 | (let ((rname (format nil "~(_~A._~A~).~A" service protocol name))) | |
999 | (dolist (prov providers) | |
1000 | (destructuring-bind | |
1001 | (srvname | |
1002 | &key | |
1003 | (port default-port) | |
1004 | (prio *default-mx-priority*) | |
1005 | (weight 0) | |
1006 | ip) | |
1007 | (listify prov) | |
1008 | (let ((host (zone-parse-host srvname zname))) | |
32ebbe9b | 1009 | (when ip (zone-set-address #'rec ip :name host)) |
716105aa MW |
1010 | (rec :name rname |
1011 | :data (list prio weight port host)))))))))) | |
1012 | ||
9f408c60 MW |
1013 | (defmethod zone-record-rrdata ((type (eql :srv)) zr) |
1014 | (destructuring-bind (prio weight port host) (zr-data zr) | |
1015 | (rec-u16 prio) | |
1016 | (rec-u16 weight) | |
1017 | (rec-u16 port) | |
1018 | (rec-name host)) | |
1019 | 33) | |
1020 | ||
a15288b4 | 1021 | (defzoneparse :net (name data rec) |
1022 | ":net (NETWORK*)" | |
1023 | (dolist (net (listify data)) | |
32ebbe9b MW |
1024 | (dolist (ipn (net-ipnets (net-must-find net))) |
1025 | (let* ((base (ipnet-net ipn)) | |
1026 | (rrtype (ipaddr-rrtype base))) | |
1027 | (flet ((frob (kind addr) | |
1028 | (when addr | |
1029 | (rec :name (zone-parse-host kind name) | |
1030 | :type rrtype | |
1031 | :data addr)))) | |
1032 | (frob "net" base) | |
1033 | (frob "mask" (ipaddr (ipnet-mask ipn) (ipnet-family ipn))) | |
1034 | (frob "bcast" (ipnet-broadcast ipn))))))) | |
7fff3797 | 1035 | |
7e282fb5 | 1036 | (defzoneparse (:rev :reverse) (name data rec) |
32ebbe9b | 1037 | ":reverse ((NET &key :prefix-bits :family) ZONE*) |
679775ba MW |
1038 | |
1039 | Add a reverse record each host in the ZONEs (or all zones) that lies | |
32ebbe9b | 1040 | within NET." |
7e282fb5 | 1041 | (setf data (listify data)) |
32ebbe9b MW |
1042 | (destructuring-bind (net &key prefix-bits (family *address-family*)) |
1043 | (listify (car data)) | |
1044 | ||
1045 | (dolist (ipn (net-parse-to-ipnets net family)) | |
1046 | (let* ((seen (make-hash-table :test #'equal)) | |
1047 | (width (ipnet-width ipn)) | |
1048 | (frag-len (if prefix-bits (- width prefix-bits) | |
1049 | (ipnet-changeable-bits width (ipnet-mask ipn))))) | |
1050 | (dolist (z (or (cdr data) (hash-table-keys *zones*))) | |
1051 | (dolist (zr (zone-records (zone-find z))) | |
1052 | (when (and (eq (zr-type zr) (ipaddr-rrtype (ipnet-net ipn))) | |
1053 | (zr-make-ptr-p zr) | |
1054 | (ipaddr-networkp (ipaddr-addr (zr-data zr)) ipn)) | |
1055 | (let* ((frag (reverse-domain-fragment (zr-data zr) | |
1056 | 0 frag-len)) | |
1057 | (name (concatenate 'string frag "." name))) | |
1058 | (unless (gethash name seen) | |
1059 | (rec :name name :type :ptr | |
1060 | :ttl (zr-ttl zr) :data (zr-name zr)) | |
1061 | (setf (gethash name seen) t)))))))))) | |
1062 | ||
74962377 | 1063 | (defzoneparse :multi (name data rec :zname zname :ttl ttl) |
32ebbe9b MW |
1064 | ":multi (((NET*) &key :start :end :family :suffix) . REC) |
1065 | ||
1066 | Output multiple records covering a portion of the reverse-resolution | |
1067 | namespace corresponding to the particular NETs. The START and END bounds | |
1068 | default to the most significant variable component of the | |
1069 | reverse-resolution domain. | |
1070 | ||
1071 | The REC tail is a sequence of record forms (as handled by | |
1072 | `zone-process-records') to be emitted for each covered address. Within | |
1073 | the bodies of these forms, the symbol `*' will be replaced by the | |
1074 | domain-name fragment corresponding to the current host, optionally | |
1075 | followed by the SUFFIX. | |
1076 | ||
1077 | Examples: | |
1078 | ||
1079 | (:multi ((delegated-subnet :start 8) | |
1080 | :ns (some.ns.delegated.example :ip \"169.254.5.2\"))) | |
1081 | ||
1082 | (:multi ((tiny-subnet :suffix \"128.10.254.169.in-addr.arpa\") | |
1083 | :cname *)) | |
1084 | ||
1085 | Obviously, nested `:multi' records won't work well." | |
1086 | ||
1087 | (destructuring-bind (nets &key start end (family *address-family*) suffix) | |
1088 | (listify (car data)) | |
1089 | (dolist (net (listify nets)) | |
1090 | (dolist (ipn (net-parse-to-ipnets net family)) | |
1091 | (let* ((addr (ipnet-net ipn)) | |
1092 | (width (ipaddr-width addr)) | |
1093 | (comp-width (reverse-domain-component-width addr)) | |
1094 | (end (round-up (or end | |
1095 | (ipnet-changeable-bits width | |
1096 | (ipnet-mask ipn))) | |
1097 | comp-width)) | |
1098 | (start (round-down (or start (- end comp-width)) | |
1099 | comp-width)) | |
1100 | (map (ipnet-host-map ipn))) | |
1101 | (multiple-value-bind (host-step host-limit) | |
1102 | (ipnet-index-bounds map start end) | |
1103 | (do ((index 0 (+ index host-step))) | |
1104 | ((> index host-limit)) | |
1105 | (let* ((addr (ipnet-index-host map index)) | |
1106 | (frag (reverse-domain-fragment addr start end)) | |
1107 | (target (concatenate 'string | |
1108 | (zone-make-name | |
1109 | (if (not suffix) frag | |
1110 | (concatenate 'string | |
1111 | frag "." suffix)) | |
1112 | zname) | |
1113 | "."))) | |
1114 | (dolist (zr (zone-parse-records (zone-make-name frag zname) | |
1115 | ttl | |
1116 | (subst target '* | |
1117 | (cdr data)))) | |
1118 | (rec :name (zr-name zr) | |
1119 | :type (zr-type zr) | |
1120 | :data (zr-data zr) | |
1121 | :ttl (zr-ttl zr) | |
1122 | :make-ptr-p (zr-make-ptr-p zr))))))))))) | |
7e282fb5 | 1123 | |
fe5fb85a MW |
1124 | ;;;-------------------------------------------------------------------------- |
1125 | ;;; Zone file output. | |
7e282fb5 | 1126 | |
afa2e2f1 | 1127 | (export 'zone-write) |
a567a3bc MW |
1128 | (defgeneric zone-write (format zone stream) |
1129 | (:documentation "Write ZONE's records to STREAM in the specified FORMAT.")) | |
1130 | ||
1131 | (defvar *writing-zone* nil | |
1132 | "The zone currently being written.") | |
1133 | ||
1134 | (defvar *zone-output-stream* nil | |
1135 | "Stream to write zone data on.") | |
1136 | ||
9f408c60 | 1137 | (export 'zone-write-raw-rrdata) |
146571da MW |
1138 | (defgeneric zone-write-raw-rrdata (format zr type data) |
1139 | (:documentation "Write an otherwise unsupported record in a given FORMAT. | |
1140 | ||
1141 | ZR gives the record object, which carries the name and TTL; the TYPE is | |
1142 | the numeric RRTYPE code; and DATA is an octet vector giving the RRDATA. | |
1143 | This is used by the default `zone-write-record' method to handle record | |
1144 | types which aren't directly supported by the format driver.")) | |
1145 | ||
1146 | (export 'zone-write-header) | |
1147 | (defgeneric zone-write-header (format zone) | |
1148 | (:documentation "Emit the header for a ZONE, in a given FORMAT. | |
1149 | ||
1150 | The header includes any kind of initial comment, the SOA record, and any | |
1151 | other necessary preamble. There is no default implementation. | |
1152 | ||
1153 | This is part of the protocol used by the default method on `zone-write'; | |
1154 | if you override that method.")) | |
1155 | ||
1156 | (export 'zone-write-trailer) | |
1157 | (defgeneric zone-write-trailer (format zone) | |
1158 | (:documentation "Emit the header for a ZONE, in a given FORMAT. | |
1159 | ||
1160 | The footer may be empty, and is so by default. | |
1161 | ||
1162 | This is part of the protocol used by the default method on `zone-write'; | |
1163 | if you override that method.") | |
1164 | (:method (format zone) | |
1165 | (declare (ignore format zone)) | |
1166 | nil)) | |
1167 | ||
1168 | (export 'zone-write-record) | |
1169 | (defgeneric zone-write-record (format type zr) | |
1170 | (:documentation "Emit a record of the given TYPE (a keyword). | |
1171 | ||
9f408c60 MW |
1172 | The default implementation builds the raw RRDATA and passes it to |
1173 | `zone-write-raw-rrdata'.") | |
1174 | (:method (format type zr) | |
1175 | (let* (code | |
1176 | (data (build-record (setf code (zone-record-rrdata type zr))))) | |
1177 | (zone-write-raw-rrdata format zr code data)))) | |
146571da MW |
1178 | |
1179 | (defmethod zone-write (format zone stream) | |
1180 | "This default method calls `zone-write-header', then `zone-write-record' | |
1181 | for each record in the zone, and finally `zone-write-trailer'. While it's | |
1182 | running, `*writing-zone*' is bound to the zone object, and | |
1183 | `*zone-output-stream*' to the output stream." | |
a567a3bc MW |
1184 | (let ((*writing-zone* zone) |
1185 | (*zone-output-stream* stream)) | |
146571da MW |
1186 | (zone-write-header format zone) |
1187 | (dolist (zr (zone-records-sorted zone)) | |
1188 | (zone-write-record format (zr-type zr) zr)) | |
1189 | (zone-write-trailer format zone))) | |
a567a3bc | 1190 | |
afa2e2f1 | 1191 | (export 'zone-save) |
a567a3bc MW |
1192 | (defun zone-save (zones &key (format :bind)) |
1193 | "Write the named ZONES to files. If no zones are given, write all the | |
1194 | zones." | |
1195 | (unless zones | |
1196 | (setf zones (hash-table-keys *zones*))) | |
1197 | (safely (safe) | |
1198 | (dolist (z zones) | |
1199 | (let ((zz (zone-find z))) | |
1200 | (unless zz | |
1201 | (error "Unknown zone `~A'." z)) | |
1202 | (let ((stream (safely-open-output-stream safe | |
1203 | (zone-file-name z :zone)))) | |
1204 | (zone-write format zz stream)))))) | |
1205 | ||
1206 | ;;;-------------------------------------------------------------------------- | |
1207 | ;;; Bind format output. | |
1208 | ||
80b5c2ff MW |
1209 | (defvar *bind-last-record-name* nil |
1210 | "The previously emitted record name. | |
1211 | ||
1212 | Used for eliding record names on output.") | |
1213 | ||
afa2e2f1 | 1214 | (export 'bind-hostname) |
a567a3bc | 1215 | (defun bind-hostname (hostname) |
80b5c2ff MW |
1216 | (let* ((h (string-downcase (stringify hostname))) |
1217 | (hl (length h)) | |
1218 | (r (string-downcase (zone-name *writing-zone*))) | |
1219 | (rl (length r))) | |
1220 | (cond ((string= r h) "@") | |
1221 | ((and (> hl rl) | |
1222 | (char= (char h (- hl rl 1)) #\.) | |
1223 | (string= h r :start1 (- hl rl))) | |
1224 | (subseq h 0 (- hl rl 1))) | |
1225 | (t (concatenate 'string h "."))))) | |
1226 | ||
1227 | (export 'bind-output-hostname) | |
1228 | (defun bind-output-hostname (hostname) | |
1229 | (let ((name (bind-hostname hostname))) | |
1230 | (cond ((and *bind-last-record-name* | |
1231 | (string= name *bind-last-record-name*)) | |
1232 | "") | |
1233 | (t | |
1234 | (setf *bind-last-record-name* name) | |
1235 | name)))) | |
a567a3bc | 1236 | |
146571da MW |
1237 | (defmethod zone-write :around ((format (eql :bind)) zone stream) |
1238 | (let ((*bind-last-record-name* nil)) | |
1239 | (call-next-method))) | |
32ebbe9b | 1240 | |
146571da MW |
1241 | (defmethod zone-write-header ((format (eql :bind)) zone) |
1242 | (format *zone-output-stream* "~ | |
7e282fb5 | 1243 | ;;; Zone file `~(~A~)' |
1244 | ;;; (generated ~A) | |
1245 | ||
7d593efd MW |
1246 | $ORIGIN ~0@*~(~A.~) |
1247 | $TTL ~2@*~D~2%" | |
7e282fb5 | 1248 | (zone-name zone) |
1249 | (iso-date :now :datep t :timep t) | |
1250 | (zone-default-ttl zone)) | |
146571da | 1251 | (let* ((soa (zone-soa zone)) |
a567a3bc MW |
1252 | (admin (let* ((name (soa-admin soa)) |
1253 | (at (position #\@ name)) | |
1254 | (copy (format nil "~(~A~)." name))) | |
1255 | (when at | |
1256 | (setf (char copy at) #\.)) | |
1257 | copy))) | |
146571da | 1258 | (format *zone-output-stream* "~ |
fffebf35 MW |
1259 | ~A~30TIN SOA~40T~A ( |
1260 | ~55@A~60T ;administrator | |
7e282fb5 | 1261 | ~45T~10D~60T ;serial |
1262 | ~45T~10D~60T ;refresh | |
1263 | ~45T~10D~60T ;retry | |
1264 | ~45T~10D~60T ;expire | |
1265 | ~45T~10D )~60T ;min-ttl~2%" | |
80b5c2ff | 1266 | (bind-output-hostname (zone-name zone)) |
a567a3bc MW |
1267 | (bind-hostname (soa-source soa)) |
1268 | admin | |
7e282fb5 | 1269 | (soa-serial soa) |
1270 | (soa-refresh soa) | |
1271 | (soa-retry soa) | |
1272 | (soa-expire soa) | |
146571da | 1273 | (soa-min-ttl soa)))) |
a567a3bc | 1274 | |
afa2e2f1 | 1275 | (export 'bind-format-record) |
146571da | 1276 | (defun bind-format-record (zr format &rest args) |
a567a3bc MW |
1277 | (format *zone-output-stream* |
1278 | "~A~20T~@[~8D~]~30TIN ~A~40T~?~%" | |
146571da MW |
1279 | (bind-output-hostname (zr-name zr)) |
1280 | (let ((ttl (zr-ttl zr))) | |
1281 | (and (/= ttl (zone-default-ttl *writing-zone*)) | |
1282 | ttl)) | |
1283 | (string-upcase (symbol-name (zr-type zr))) | |
a567a3bc MW |
1284 | format args)) |
1285 | ||
9f408c60 MW |
1286 | (defmethod zone-write-raw-rrdata ((format (eql :bind)) zr type data) |
1287 | (format *zone-output-stream* | |
1288 | "~A~20T~@[~8D~]~30TIN TYPE~A~40T\\# ~A" | |
1289 | (bind-output-hostname (zr-name zr)) | |
1290 | (let ((ttl (zr-ttl zr))) | |
1291 | (and (/= ttl (zone-default-ttl *writing-zone*)) | |
1292 | ttl)) | |
1293 | type | |
1294 | (length data)) | |
1295 | (let* ((hex (with-output-to-string (out) | |
1296 | (dotimes (i (length data)) | |
1297 | (format out "~(~2,'0X~)" (aref data i))))) | |
1298 | (len (length hex))) | |
1299 | (cond ((< len 24) | |
1300 | (format *zone-output-stream* " ~A~%" hex)) | |
1301 | (t | |
1302 | (format *zone-output-stream* " (") | |
1303 | (let ((i 0)) | |
1304 | (loop | |
1305 | (when (>= i len) (return)) | |
1306 | (let ((j (min (+ i 64) len))) | |
1307 | (format *zone-output-stream* "~%~8T~A" (subseq hex i j)) | |
1308 | (setf i j)))) | |
1309 | (format *zone-output-stream* " )~%"))))) | |
1310 | ||
146571da MW |
1311 | (defmethod zone-write-record ((format (eql :bind)) (type (eql :a)) zr) |
1312 | (bind-format-record zr "~A" (ipaddr-string (zr-data zr)))) | |
1313 | ||
1314 | (defmethod zone-write-record ((format (eql :bind)) (type (eql :aaaa)) zr) | |
1315 | (bind-format-record zr "~A" (ipaddr-string (zr-data zr)))) | |
1316 | ||
1317 | (defmethod zone-write-record ((format (eql :bind)) (type (eql :ptr)) zr) | |
1318 | (bind-format-record zr "~A" (bind-hostname (zr-data zr)))) | |
1319 | ||
1320 | (defmethod zone-write-record ((format (eql :bind)) (type (eql :cname)) zr) | |
1321 | (bind-format-record zr "~A" (bind-hostname (zr-data zr)))) | |
1322 | ||
1323 | (defmethod zone-write-record ((format (eql :bind)) (type (eql :ns)) zr) | |
1324 | (bind-format-record zr "~A" (bind-hostname (zr-data zr)))) | |
1325 | ||
1326 | (defmethod zone-write-record ((format (eql :bind)) (type (eql :mx)) zr) | |
1327 | (bind-format-record zr "~2D ~A" | |
1328 | (cdr (zr-data zr)) | |
1329 | (bind-hostname (car (zr-data zr))))) | |
1330 | ||
1331 | (defmethod zone-write-record ((format (eql :bind)) (type (eql :srv)) zr) | |
1332 | (destructuring-bind (prio weight port host) (zr-data zr) | |
1333 | (bind-format-record zr "~2D ~5D ~5D ~A" | |
1334 | prio weight port (bind-hostname host)))) | |
1335 | ||
1336 | (defmethod zone-write-record ((format (eql :bind)) (type (eql :sshfp)) zr) | |
1337 | (bind-format-record zr "~{~2D ~2D ~A~}" (zr-data zr))) | |
1338 | ||
1339 | (defmethod zone-write-record ((format (eql :bind)) (type (eql :txt)) zr) | |
1340 | (bind-format-record zr "~{~#[\"\"~;~S~:;(~@{~%~8T~S~} )~]~}" (zr-data zr))) | |
32ebbe9b | 1341 | |
e97012de MW |
1342 | ;;;-------------------------------------------------------------------------- |
1343 | ;;; tinydns-data output format. | |
1344 | ||
422e7cfc | 1345 | (export 'tinydns-output) |
e97012de MW |
1346 | (defun tinydns-output (code &rest fields) |
1347 | (format *zone-output-stream* "~C~{~@[~A~]~^:~}~%" code fields)) | |
1348 | ||
9f408c60 | 1349 | (defmethod zone-write-raw-rrdata ((format (eql :tinydns)) zr type data) |
e97012de MW |
1350 | (tinydns-output #\: (zr-name zr) type |
1351 | (with-output-to-string (out) | |
1352 | (dotimes (i (length data)) | |
1353 | (let ((byte (aref data i))) | |
1354 | (if (or (<= byte 32) | |
1355 | (>= byte 128) | |
1356 | (member byte '(#\: #\\) :key #'char-code)) | |
1357 | (format out "\\~3,'0O" byte) | |
1358 | (write-char (code-char byte) out))))) | |
1359 | (zr-ttl zr))) | |
1360 | ||
146571da MW |
1361 | (defmethod zone-write-record ((format (eql :tinydns)) (type (eql :a)) zr) |
1362 | (tinydns-output #\+ (zr-name zr) | |
1363 | (ipaddr-string (zr-data zr)) (zr-ttl zr))) | |
1364 | ||
1365 | (defmethod zone-write-record ((format (eql :tinydns)) (type (eql :aaaa)) zr) | |
1366 | (tinydns-output #\3 (zr-name zr) | |
1367 | (format nil "~(~32,'0X~)" (ipaddr-addr (zr-data zr))) | |
1368 | (zr-ttl zr))) | |
1369 | ||
1370 | (defmethod zone-write-record ((format (eql :tinydns)) (type (eql :ptr)) zr) | |
1371 | (tinydns-output #\^ (zr-name zr) (zr-data zr) (zr-ttl zr))) | |
1372 | ||
1373 | (defmethod zone-write-record ((format (eql :tinydns)) (type (eql :cname)) zr) | |
1374 | (tinydns-output #\C (zr-name zr) (zr-data zr) (zr-ttl zr))) | |
1375 | ||
1376 | (defmethod zone-write-record ((format (eql :tinydns)) (type (eql :ns)) zr) | |
1377 | (tinydns-output #\& (zr-name zr) nil (zr-data zr) (zr-ttl zr))) | |
1378 | ||
1379 | (defmethod zone-write-record ((format (eql :tinydns)) (type (eql :mx)) zr) | |
1380 | (let ((name (car (zr-data zr))) | |
1381 | (prio (cdr (zr-data zr)))) | |
1382 | (tinydns-output #\@ (zr-name zr) nil name prio (zr-ttl zr)))) | |
1383 | ||
146571da MW |
1384 | (defmethod zone-write-header ((format (eql :tinydns)) zone) |
1385 | (format *zone-output-stream* "~ | |
e97012de MW |
1386 | ### Zone file `~(~A~)' |
1387 | ### (generated ~A) | |
1388 | ~%" | |
1389 | (zone-name zone) | |
1390 | (iso-date :now :datep t :timep t)) | |
1391 | (let ((soa (zone-soa zone))) | |
1392 | (tinydns-output #\Z | |
1393 | (zone-name zone) | |
1394 | (soa-source soa) | |
1395 | (let* ((name (copy-seq (soa-admin soa))) | |
1396 | (at (position #\@ name))) | |
1397 | (when at (setf (char name at) #\.)) | |
1398 | name) | |
1399 | (soa-serial soa) | |
1400 | (soa-refresh soa) | |
1401 | (soa-expire soa) | |
1402 | (soa-min-ttl soa) | |
146571da | 1403 | (zone-default-ttl zone)))) |
e97012de | 1404 | |
7e282fb5 | 1405 | ;;;----- That's all, folks -------------------------------------------------- |