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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ | |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <math.h> | |
23 | ||
24 | #include "strv.h" | |
25 | ||
26 | #include "dns-domain.h" | |
27 | #include "resolved-dns-rr.h" | |
28 | #include "resolved-dns-packet.h" | |
29 | #include "dns-type.h" | |
30 | ||
31 | DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) { | |
32 | DnsResourceKey *k; | |
33 | size_t l; | |
34 | ||
35 | assert(name); | |
36 | ||
37 | l = strlen(name); | |
38 | k = malloc0(sizeof(DnsResourceKey) + l + 1); | |
39 | if (!k) | |
40 | return NULL; | |
41 | ||
42 | k->n_ref = 1; | |
43 | k->class = class; | |
44 | k->type = type; | |
45 | ||
46 | strcpy((char*) k + sizeof(DnsResourceKey), name); | |
47 | ||
48 | return k; | |
49 | } | |
50 | ||
51 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) { | |
52 | DnsResourceKey *k; | |
53 | ||
54 | assert(name); | |
55 | ||
56 | k = new0(DnsResourceKey, 1); | |
57 | if (!k) | |
58 | return NULL; | |
59 | ||
60 | k->n_ref = 1; | |
61 | k->class = class; | |
62 | k->type = type; | |
63 | k->_name = name; | |
64 | ||
65 | return k; | |
66 | } | |
67 | ||
68 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) { | |
69 | ||
70 | if (!k) | |
71 | return NULL; | |
72 | ||
73 | assert(k->n_ref > 0); | |
74 | k->n_ref++; | |
75 | ||
76 | return k; | |
77 | } | |
78 | ||
79 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) { | |
80 | if (!k) | |
81 | return NULL; | |
82 | ||
83 | assert(k->n_ref > 0); | |
84 | ||
85 | if (k->n_ref == 1) { | |
86 | free(k->_name); | |
87 | free(k); | |
88 | } else | |
89 | k->n_ref--; | |
90 | ||
91 | return NULL; | |
92 | } | |
93 | ||
94 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) { | |
95 | int r; | |
96 | ||
97 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b)); | |
98 | if (r <= 0) | |
99 | return r; | |
100 | ||
101 | if (a->class != b->class) | |
102 | return 0; | |
103 | ||
104 | if (a->type != b->type) | |
105 | return 0; | |
106 | ||
107 | return 1; | |
108 | } | |
109 | ||
110 | int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr) { | |
111 | assert(key); | |
112 | assert(rr); | |
113 | ||
114 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) | |
115 | return 0; | |
116 | ||
117 | if (rr->key->type != key->type && key->type != DNS_TYPE_ANY) | |
118 | return 0; | |
119 | ||
120 | return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key)); | |
121 | } | |
122 | ||
123 | int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr) { | |
124 | assert(key); | |
125 | assert(rr); | |
126 | ||
127 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) | |
128 | return 0; | |
129 | ||
130 | if (rr->key->type != DNS_TYPE_CNAME) | |
131 | return 0; | |
132 | ||
133 | return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key)); | |
134 | } | |
135 | ||
136 | static unsigned long dns_resource_key_hash_func(const void *i, const uint8_t hash_key[HASH_KEY_SIZE]) { | |
137 | const DnsResourceKey *k = i; | |
138 | unsigned long ul; | |
139 | ||
140 | ul = dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), hash_key); | |
141 | ul = ul * hash_key[0] + ul + k->class; | |
142 | ul = ul * hash_key[1] + ul + k->type; | |
143 | ||
144 | return ul; | |
145 | } | |
146 | ||
147 | static int dns_resource_key_compare_func(const void *a, const void *b) { | |
148 | const DnsResourceKey *x = a, *y = b; | |
149 | int ret; | |
150 | ||
151 | ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y)); | |
152 | if (ret != 0) | |
153 | return ret; | |
154 | ||
155 | if (x->type < y->type) | |
156 | return -1; | |
157 | if (x->type > y->type) | |
158 | return 1; | |
159 | ||
160 | if (x->class < y->class) | |
161 | return -1; | |
162 | if (x->class > y->class) | |
163 | return 1; | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | const struct hash_ops dns_resource_key_hash_ops = { | |
169 | .hash = dns_resource_key_hash_func, | |
170 | .compare = dns_resource_key_compare_func | |
171 | }; | |
172 | ||
173 | int dns_resource_key_to_string(const DnsResourceKey *key, char **ret) { | |
174 | char cbuf[strlen("CLASS") + DECIMAL_STR_MAX(uint16_t)], tbuf[strlen("TYPE") + DECIMAL_STR_MAX(uint16_t)]; | |
175 | const char *c, *t; | |
176 | char *s; | |
177 | ||
178 | c = dns_class_to_string(key->class); | |
179 | if (!c) { | |
180 | sprintf(cbuf, "CLASS%u", key->class); | |
181 | c = cbuf; | |
182 | } | |
183 | ||
184 | t = dns_type_to_string(key->type); | |
185 | if (!t){ | |
186 | sprintf(tbuf, "TYPE%u", key->type); | |
187 | t = tbuf; | |
188 | } | |
189 | ||
190 | if (asprintf(&s, "%s %s %-5s", DNS_RESOURCE_KEY_NAME(key), c, t) < 0) | |
191 | return -ENOMEM; | |
192 | ||
193 | *ret = s; | |
194 | return 0; | |
195 | } | |
196 | ||
197 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { | |
198 | DnsResourceRecord *rr; | |
199 | ||
200 | rr = new0(DnsResourceRecord, 1); | |
201 | if (!rr) | |
202 | return NULL; | |
203 | ||
204 | rr->n_ref = 1; | |
205 | rr->key = dns_resource_key_ref(key); | |
206 | ||
207 | return rr; | |
208 | } | |
209 | ||
210 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) { | |
211 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
212 | ||
213 | key = dns_resource_key_new(class, type, name); | |
214 | if (!key) | |
215 | return NULL; | |
216 | ||
217 | return dns_resource_record_new(key); | |
218 | } | |
219 | ||
220 | DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) { | |
221 | if (!rr) | |
222 | return NULL; | |
223 | ||
224 | assert(rr->n_ref > 0); | |
225 | rr->n_ref++; | |
226 | ||
227 | return rr; | |
228 | } | |
229 | ||
230 | DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) { | |
231 | if (!rr) | |
232 | return NULL; | |
233 | ||
234 | assert(rr->n_ref > 0); | |
235 | ||
236 | if (rr->n_ref > 1) { | |
237 | rr->n_ref--; | |
238 | return NULL; | |
239 | } | |
240 | ||
241 | if (rr->key) { | |
242 | switch(rr->key->type) { | |
243 | ||
244 | case DNS_TYPE_SRV: | |
245 | free(rr->srv.name); | |
246 | break; | |
247 | ||
248 | case DNS_TYPE_PTR: | |
249 | case DNS_TYPE_NS: | |
250 | case DNS_TYPE_CNAME: | |
251 | case DNS_TYPE_DNAME: | |
252 | free(rr->ptr.name); | |
253 | break; | |
254 | ||
255 | case DNS_TYPE_HINFO: | |
256 | free(rr->hinfo.cpu); | |
257 | free(rr->hinfo.os); | |
258 | break; | |
259 | ||
260 | case DNS_TYPE_TXT: | |
261 | case DNS_TYPE_SPF: | |
262 | strv_free(rr->txt.strings); | |
263 | break; | |
264 | ||
265 | case DNS_TYPE_SOA: | |
266 | free(rr->soa.mname); | |
267 | free(rr->soa.rname); | |
268 | break; | |
269 | ||
270 | case DNS_TYPE_MX: | |
271 | free(rr->mx.exchange); | |
272 | break; | |
273 | ||
274 | case DNS_TYPE_DS: | |
275 | free(rr->ds.digest); | |
276 | break; | |
277 | ||
278 | case DNS_TYPE_SSHFP: | |
279 | free(rr->sshfp.key); | |
280 | break; | |
281 | ||
282 | case DNS_TYPE_DNSKEY: | |
283 | free(rr->dnskey.key); | |
284 | break; | |
285 | ||
286 | case DNS_TYPE_RRSIG: | |
287 | free(rr->rrsig.signer); | |
288 | free(rr->rrsig.signature); | |
289 | break; | |
290 | ||
291 | case DNS_TYPE_LOC: | |
292 | case DNS_TYPE_A: | |
293 | case DNS_TYPE_AAAA: | |
294 | break; | |
295 | ||
296 | default: | |
297 | free(rr->generic.data); | |
298 | } | |
299 | ||
300 | dns_resource_key_unref(rr->key); | |
301 | } | |
302 | ||
303 | free(rr); | |
304 | ||
305 | return NULL; | |
306 | } | |
307 | ||
308 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) { | |
309 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
310 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; | |
311 | _cleanup_free_ char *ptr = NULL; | |
312 | int r; | |
313 | ||
314 | assert(ret); | |
315 | assert(address); | |
316 | assert(hostname); | |
317 | ||
318 | r = dns_name_reverse(family, address, &ptr); | |
319 | if (r < 0) | |
320 | return r; | |
321 | ||
322 | key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr); | |
323 | if (!key) | |
324 | return -ENOMEM; | |
325 | ||
326 | ptr = NULL; | |
327 | ||
328 | rr = dns_resource_record_new(key); | |
329 | if (!rr) | |
330 | return -ENOMEM; | |
331 | ||
332 | rr->ptr.name = strdup(hostname); | |
333 | if (!rr->ptr.name) | |
334 | return -ENOMEM; | |
335 | ||
336 | *ret = rr; | |
337 | rr = NULL; | |
338 | ||
339 | return 0; | |
340 | } | |
341 | ||
342 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { | |
343 | int r; | |
344 | ||
345 | assert(a); | |
346 | assert(b); | |
347 | ||
348 | r = dns_resource_key_equal(a->key, b->key); | |
349 | if (r <= 0) | |
350 | return r; | |
351 | ||
352 | if (a->unparseable != b->unparseable) | |
353 | return 0; | |
354 | ||
355 | switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) { | |
356 | ||
357 | case DNS_TYPE_SRV: | |
358 | r = dns_name_equal(a->srv.name, b->srv.name); | |
359 | if (r <= 0) | |
360 | return r; | |
361 | ||
362 | return a->srv.priority == b->srv.priority && | |
363 | a->srv.weight == b->srv.weight && | |
364 | a->srv.port == b->srv.port; | |
365 | ||
366 | case DNS_TYPE_PTR: | |
367 | case DNS_TYPE_NS: | |
368 | case DNS_TYPE_CNAME: | |
369 | case DNS_TYPE_DNAME: | |
370 | return dns_name_equal(a->ptr.name, b->ptr.name); | |
371 | ||
372 | case DNS_TYPE_HINFO: | |
373 | return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && | |
374 | strcaseeq(a->hinfo.os, b->hinfo.os); | |
375 | ||
376 | case DNS_TYPE_SPF: /* exactly the same as TXT */ | |
377 | case DNS_TYPE_TXT: | |
378 | return strv_equal(a->txt.strings, b->txt.strings); | |
379 | ||
380 | case DNS_TYPE_A: | |
381 | return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; | |
382 | ||
383 | case DNS_TYPE_AAAA: | |
384 | return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; | |
385 | ||
386 | case DNS_TYPE_SOA: | |
387 | r = dns_name_equal(a->soa.mname, b->soa.mname); | |
388 | if (r <= 0) | |
389 | return r; | |
390 | r = dns_name_equal(a->soa.rname, b->soa.rname); | |
391 | if (r <= 0) | |
392 | return r; | |
393 | ||
394 | return a->soa.serial == b->soa.serial && | |
395 | a->soa.refresh == b->soa.refresh && | |
396 | a->soa.retry == b->soa.retry && | |
397 | a->soa.expire == b->soa.expire && | |
398 | a->soa.minimum == b->soa.minimum; | |
399 | ||
400 | case DNS_TYPE_MX: | |
401 | if (a->mx.priority != b->mx.priority) | |
402 | return 0; | |
403 | ||
404 | return dns_name_equal(a->mx.exchange, b->mx.exchange); | |
405 | ||
406 | case DNS_TYPE_LOC: | |
407 | assert(a->loc.version == b->loc.version); | |
408 | ||
409 | return a->loc.size == b->loc.size && | |
410 | a->loc.horiz_pre == b->loc.horiz_pre && | |
411 | a->loc.vert_pre == b->loc.vert_pre && | |
412 | a->loc.latitude == b->loc.latitude && | |
413 | a->loc.longitude == b->loc.longitude && | |
414 | a->loc.altitude == b->loc.altitude; | |
415 | ||
416 | case DNS_TYPE_DS: | |
417 | return a->ds.key_tag == b->ds.key_tag && | |
418 | a->ds.algorithm == b->ds.algorithm && | |
419 | a->ds.digest_type == b->ds.digest_type && | |
420 | a->ds.digest_size == b->ds.digest_size && | |
421 | memcmp(a->ds.digest, b->ds.digest, a->ds.digest_size) == 0; | |
422 | ||
423 | case DNS_TYPE_SSHFP: | |
424 | return a->sshfp.algorithm == b->sshfp.algorithm && | |
425 | a->sshfp.fptype == b->sshfp.fptype && | |
426 | a->sshfp.key_size == b->sshfp.key_size && | |
427 | memcmp(a->sshfp.key, b->sshfp.key, a->sshfp.key_size) == 0; | |
428 | ||
429 | case DNS_TYPE_DNSKEY: | |
430 | return a->dnskey.zone_key_flag == b->dnskey.zone_key_flag && | |
431 | a->dnskey.sep_flag == b->dnskey.sep_flag && | |
432 | a->dnskey.algorithm == b->dnskey.algorithm && | |
433 | a->dnskey.key_size == b->dnskey.key_size && | |
434 | memcmp(a->dnskey.key, b->dnskey.key, a->dnskey.key_size) == 0; | |
435 | ||
436 | case DNS_TYPE_RRSIG: | |
437 | /* do the fast comparisons first */ | |
438 | if (a->rrsig.type_covered != b->rrsig.type_covered || | |
439 | a->rrsig.algorithm != b->rrsig.algorithm || | |
440 | a->rrsig.labels != b->rrsig.labels || | |
441 | a->rrsig.original_ttl != b->rrsig.original_ttl || | |
442 | a->rrsig.expiration != b->rrsig.expiration || | |
443 | a->rrsig.inception != b->rrsig.inception || | |
444 | a->rrsig.key_tag != b->rrsig.key_tag || | |
445 | a->rrsig.signature_size != b->rrsig.signature_size || | |
446 | memcmp(a->rrsig.signature, b->rrsig.signature, a->rrsig.signature_size) != 0) | |
447 | return false; | |
448 | ||
449 | return dns_name_equal(a->rrsig.signer, b->rrsig.signer); | |
450 | ||
451 | default: | |
452 | return a->generic.size == b->generic.size && | |
453 | memcmp(a->generic.data, b->generic.data, a->generic.size) == 0; | |
454 | } | |
455 | } | |
456 | ||
457 | static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude, | |
458 | uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) { | |
459 | char *s; | |
460 | char NS = latitude >= 1U<<31 ? 'N' : 'S'; | |
461 | char EW = longitude >= 1U<<31 ? 'E' : 'W'; | |
462 | ||
463 | int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude); | |
464 | int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude); | |
465 | double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude); | |
466 | double siz = (size >> 4) * exp10((double) (size & 0xF)); | |
467 | double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF)); | |
468 | double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF)); | |
469 | ||
470 | if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm", | |
471 | (lat / 60000 / 60), | |
472 | (lat / 60000) % 60, | |
473 | (lat % 60000) / 1000., | |
474 | NS, | |
475 | (lon / 60000 / 60), | |
476 | (lon / 60000) % 60, | |
477 | (lon % 60000) / 1000., | |
478 | EW, | |
479 | alt / 100., | |
480 | siz / 100., | |
481 | hor / 100., | |
482 | ver / 100.) < 0) | |
483 | return NULL; | |
484 | ||
485 | return s; | |
486 | } | |
487 | ||
488 | static int format_timestamp_dns(char *buf, size_t l, time_t sec) { | |
489 | struct tm tm; | |
490 | ||
491 | assert(buf); | |
492 | assert(l > strlen("YYYYMMDDHHmmSS")); | |
493 | ||
494 | if (!gmtime_r(&sec, &tm)) | |
495 | return -EINVAL; | |
496 | ||
497 | if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0) | |
498 | return -EINVAL; | |
499 | ||
500 | return 0; | |
501 | } | |
502 | ||
503 | int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) { | |
504 | _cleanup_free_ char *k = NULL, *t = NULL; | |
505 | char *s; | |
506 | int r; | |
507 | ||
508 | assert(rr); | |
509 | ||
510 | r = dns_resource_key_to_string(rr->key, &k); | |
511 | if (r < 0) | |
512 | return r; | |
513 | ||
514 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { | |
515 | ||
516 | case DNS_TYPE_SRV: | |
517 | r = asprintf(&s, "%s %u %u %u %s", | |
518 | k, | |
519 | rr->srv.priority, | |
520 | rr->srv.weight, | |
521 | rr->srv.port, | |
522 | strna(rr->srv.name)); | |
523 | if (r < 0) | |
524 | return -ENOMEM; | |
525 | break; | |
526 | ||
527 | case DNS_TYPE_PTR: | |
528 | case DNS_TYPE_NS: | |
529 | case DNS_TYPE_CNAME: | |
530 | case DNS_TYPE_DNAME: | |
531 | s = strjoin(k, " ", rr->ptr.name, NULL); | |
532 | if (!s) | |
533 | return -ENOMEM; | |
534 | ||
535 | break; | |
536 | ||
537 | case DNS_TYPE_HINFO: | |
538 | s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL); | |
539 | if (!s) | |
540 | return -ENOMEM; | |
541 | break; | |
542 | ||
543 | case DNS_TYPE_SPF: /* exactly the same as TXT */ | |
544 | case DNS_TYPE_TXT: | |
545 | t = strv_join_quoted(rr->txt.strings); | |
546 | if (!t) | |
547 | return -ENOMEM; | |
548 | ||
549 | s = strjoin(k, " ", t, NULL); | |
550 | if (!s) | |
551 | return -ENOMEM; | |
552 | ||
553 | break; | |
554 | ||
555 | case DNS_TYPE_A: { | |
556 | _cleanup_free_ char *x = NULL; | |
557 | ||
558 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x); | |
559 | if (r < 0) | |
560 | return r; | |
561 | ||
562 | s = strjoin(k, " ", x, NULL); | |
563 | if (!s) | |
564 | return -ENOMEM; | |
565 | break; | |
566 | } | |
567 | ||
568 | case DNS_TYPE_AAAA: | |
569 | r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); | |
570 | if (r < 0) | |
571 | return r; | |
572 | ||
573 | s = strjoin(k, " ", t, NULL); | |
574 | if (!s) | |
575 | return -ENOMEM; | |
576 | break; | |
577 | ||
578 | case DNS_TYPE_SOA: | |
579 | r = asprintf(&s, "%s %s %s %u %u %u %u %u", | |
580 | k, | |
581 | strna(rr->soa.mname), | |
582 | strna(rr->soa.rname), | |
583 | rr->soa.serial, | |
584 | rr->soa.refresh, | |
585 | rr->soa.retry, | |
586 | rr->soa.expire, | |
587 | rr->soa.minimum); | |
588 | if (r < 0) | |
589 | return -ENOMEM; | |
590 | break; | |
591 | ||
592 | case DNS_TYPE_MX: | |
593 | r = asprintf(&s, "%s %u %s", | |
594 | k, | |
595 | rr->mx.priority, | |
596 | rr->mx.exchange); | |
597 | if (r < 0) | |
598 | return -ENOMEM; | |
599 | break; | |
600 | ||
601 | case DNS_TYPE_LOC: | |
602 | assert(rr->loc.version == 0); | |
603 | ||
604 | t = format_location(rr->loc.latitude, | |
605 | rr->loc.longitude, | |
606 | rr->loc.altitude, | |
607 | rr->loc.size, | |
608 | rr->loc.horiz_pre, | |
609 | rr->loc.vert_pre); | |
610 | if (!t) | |
611 | return -ENOMEM; | |
612 | ||
613 | s = strjoin(k, " ", t, NULL); | |
614 | if (!s) | |
615 | return -ENOMEM; | |
616 | break; | |
617 | ||
618 | case DNS_TYPE_DS: | |
619 | t = hexmem(rr->ds.digest, rr->ds.digest_size); | |
620 | if (!t) | |
621 | return -ENOMEM; | |
622 | ||
623 | r = asprintf(&s, "%s %u %u %u %s", | |
624 | k, | |
625 | rr->ds.key_tag, | |
626 | rr->ds.algorithm, | |
627 | rr->ds.digest_type, | |
628 | t); | |
629 | if (r < 0) | |
630 | return -ENOMEM; | |
631 | break; | |
632 | ||
633 | case DNS_TYPE_SSHFP: | |
634 | t = hexmem(rr->sshfp.key, rr->sshfp.key_size); | |
635 | if (!t) | |
636 | return -ENOMEM; | |
637 | ||
638 | r = asprintf(&s, "%s %u %u %s", | |
639 | k, | |
640 | rr->sshfp.algorithm, | |
641 | rr->sshfp.fptype, | |
642 | t); | |
643 | if (r < 0) | |
644 | return -ENOMEM; | |
645 | break; | |
646 | ||
647 | case DNS_TYPE_DNSKEY: { | |
648 | const char *alg; | |
649 | ||
650 | alg = dnssec_algorithm_to_string(rr->dnskey.algorithm); | |
651 | ||
652 | t = base64mem(rr->dnskey.key, rr->dnskey.key_size); | |
653 | if (!t) | |
654 | return -ENOMEM; | |
655 | ||
656 | r = asprintf(&s, "%s %u 3 %.*s%.*u %s", | |
657 | k, | |
658 | dnskey_to_flags(rr), | |
659 | alg ? -1 : 0, alg, | |
660 | alg ? 0 : 1, alg ? 0u : (unsigned) rr->dnskey.algorithm, | |
661 | t); | |
662 | if (r < 0) | |
663 | return -ENOMEM; | |
664 | break; | |
665 | } | |
666 | ||
667 | case DNS_TYPE_RRSIG: { | |
668 | const char *type, *alg; | |
669 | char expiration[strlen("YYYYMMDDHHmmSS") + 1], inception[strlen("YYYYMMDDHHmmSS") + 1]; | |
670 | ||
671 | type = dns_type_to_string(rr->rrsig.type_covered); | |
672 | alg = dnssec_algorithm_to_string(rr->rrsig.algorithm); | |
673 | ||
674 | t = base64mem(rr->rrsig.signature, rr->rrsig.signature_size); | |
675 | if (!t) | |
676 | return -ENOMEM; | |
677 | ||
678 | r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration); | |
679 | if (r < 0) | |
680 | return r; | |
681 | ||
682 | r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception); | |
683 | if (r < 0) | |
684 | return r; | |
685 | ||
686 | /* TYPE?? follows | |
687 | * http://tools.ietf.org/html/rfc3597#section-5 */ | |
688 | ||
689 | r = asprintf(&s, "%s %s%.*u %.*s%.*u %u %u %s %s %u %s %s", | |
690 | k, | |
691 | type ?: "TYPE", | |
692 | type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, | |
693 | alg ? -1 : 0, alg, | |
694 | alg ? 0 : 1, alg ? 0u : (unsigned) rr->rrsig.algorithm, | |
695 | rr->rrsig.labels, | |
696 | rr->rrsig.original_ttl, | |
697 | expiration, | |
698 | inception, | |
699 | rr->rrsig.key_tag, | |
700 | rr->rrsig.signer, | |
701 | t); | |
702 | if (r < 0) | |
703 | return -ENOMEM; | |
704 | break; | |
705 | } | |
706 | ||
707 | default: | |
708 | t = hexmem(rr->generic.data, rr->generic.size); | |
709 | if (!t) | |
710 | return -ENOMEM; | |
711 | ||
712 | r = asprintf(&s, "%s \\# %"PRIu8" %s", k, rr->generic.size, t); | |
713 | if (r < 0) | |
714 | return -ENOMEM; | |
715 | break; | |
716 | } | |
717 | ||
718 | *ret = s; | |
719 | return 0; | |
720 | } | |
721 | ||
722 | const char *dns_class_to_string(uint16_t class) { | |
723 | ||
724 | switch (class) { | |
725 | ||
726 | case DNS_CLASS_IN: | |
727 | return "IN"; | |
728 | ||
729 | case DNS_CLASS_ANY: | |
730 | return "ANY"; | |
731 | } | |
732 | ||
733 | return NULL; | |
734 | } | |
735 | ||
736 | int dns_class_from_string(const char *s, uint16_t *class) { | |
737 | assert(s); | |
738 | assert(class); | |
739 | ||
740 | if (strcaseeq(s, "IN")) | |
741 | *class = DNS_CLASS_IN; | |
742 | else if (strcaseeq(s, "ANY")) | |
743 | *class = DNS_TYPE_ANY; | |
744 | else | |
745 | return -EINVAL; | |
746 | ||
747 | return 0; | |
748 | } |