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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
74b2466e LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2014 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
0dae31d4 ZJS |
21 | #include <math.h> |
22 | ||
b5efdb8a | 23 | #include "alloc-util.h" |
4ad7f276 | 24 | #include "dns-domain.h" |
7263f724 | 25 | #include "dns-type.h" |
95052df3 | 26 | #include "escape.h" |
e4e73a63 | 27 | #include "hexdecoct.h" |
fc8eec10 | 28 | #include "resolved-dns-dnssec.h" |
07630cea | 29 | #include "resolved-dns-packet.h" |
e4e73a63 | 30 | #include "resolved-dns-rr.h" |
8730bccf | 31 | #include "string-table.h" |
07630cea LP |
32 | #include "string-util.h" |
33 | #include "strv.h" | |
d7671a3e | 34 | #include "terminal-util.h" |
74b2466e | 35 | |
faa133f3 LP |
36 | DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) { |
37 | DnsResourceKey *k; | |
38 | size_t l; | |
74b2466e | 39 | |
faa133f3 LP |
40 | assert(name); |
41 | ||
42 | l = strlen(name); | |
43 | k = malloc0(sizeof(DnsResourceKey) + l + 1); | |
44 | if (!k) | |
45 | return NULL; | |
46 | ||
47 | k->n_ref = 1; | |
48 | k->class = class; | |
49 | k->type = type; | |
50 | ||
51 | strcpy((char*) k + sizeof(DnsResourceKey), name); | |
52 | ||
53 | return k; | |
54 | } | |
55 | ||
36d9205d | 56 | DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname) { |
58db254a LP |
57 | int r; |
58 | ||
36d9205d TG |
59 | assert(key); |
60 | assert(cname); | |
61 | ||
58db254a LP |
62 | assert(IN_SET(cname->key->type, DNS_TYPE_CNAME, DNS_TYPE_DNAME)); |
63 | ||
64 | if (cname->key->type == DNS_TYPE_CNAME) | |
65 | return dns_resource_key_new(key->class, key->type, cname->cname.name); | |
66 | else { | |
67 | DnsResourceKey *k; | |
68 | char *destination = NULL; | |
69 | ||
1c02e7ba | 70 | r = dns_name_change_suffix(dns_resource_key_name(key), dns_resource_key_name(cname->key), cname->dname.name, &destination); |
58db254a LP |
71 | if (r < 0) |
72 | return NULL; | |
73 | if (r == 0) | |
74 | return dns_resource_key_ref((DnsResourceKey*) key); | |
75 | ||
76 | k = dns_resource_key_new_consume(key->class, key->type, destination); | |
6b430fdb ZJS |
77 | if (!k) |
78 | return mfree(destination); | |
58db254a LP |
79 | |
80 | return k; | |
81 | } | |
36d9205d TG |
82 | } |
83 | ||
801ad6a6 LP |
84 | int dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name) { |
85 | DnsResourceKey *new_key; | |
86 | char *joined; | |
87 | int r; | |
88 | ||
89 | assert(ret); | |
90 | assert(key); | |
91 | assert(name); | |
92 | ||
dc477e73 | 93 | if (dns_name_is_root(name)) { |
801ad6a6 LP |
94 | *ret = dns_resource_key_ref(key); |
95 | return 0; | |
96 | } | |
97 | ||
1c02e7ba | 98 | r = dns_name_concat(dns_resource_key_name(key), name, &joined); |
801ad6a6 LP |
99 | if (r < 0) |
100 | return r; | |
101 | ||
102 | new_key = dns_resource_key_new_consume(key->class, key->type, joined); | |
103 | if (!new_key) { | |
104 | free(joined); | |
105 | return -ENOMEM; | |
106 | } | |
107 | ||
108 | *ret = new_key; | |
109 | return 0; | |
110 | } | |
111 | ||
faa133f3 LP |
112 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) { |
113 | DnsResourceKey *k; | |
114 | ||
115 | assert(name); | |
116 | ||
117 | k = new0(DnsResourceKey, 1); | |
118 | if (!k) | |
119 | return NULL; | |
120 | ||
121 | k->n_ref = 1; | |
122 | k->class = class; | |
123 | k->type = type; | |
124 | k->_name = name; | |
125 | ||
126 | return k; | |
127 | } | |
128 | ||
129 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) { | |
130 | ||
131 | if (!k) | |
132 | return NULL; | |
133 | ||
1b4f6e79 LP |
134 | /* Static/const keys created with DNS_RESOURCE_KEY_CONST will |
135 | * set this to -1, they should not be reffed/unreffed */ | |
136 | assert(k->n_ref != (unsigned) -1); | |
137 | ||
faa133f3 LP |
138 | assert(k->n_ref > 0); |
139 | k->n_ref++; | |
140 | ||
141 | return k; | |
142 | } | |
143 | ||
144 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) { | |
145 | if (!k) | |
146 | return NULL; | |
147 | ||
1b4f6e79 | 148 | assert(k->n_ref != (unsigned) -1); |
faa133f3 LP |
149 | assert(k->n_ref > 0); |
150 | ||
151 | if (k->n_ref == 1) { | |
152 | free(k->_name); | |
153 | free(k); | |
154 | } else | |
155 | k->n_ref--; | |
156 | ||
157 | return NULL; | |
158 | } | |
159 | ||
1c02e7ba ZJS |
160 | const char* dns_resource_key_name(const DnsResourceKey *key) { |
161 | const char *name; | |
162 | ||
163 | if (!key) | |
164 | return NULL; | |
165 | ||
166 | if (key->_name) | |
167 | name = key->_name; | |
168 | else | |
169 | name = (char*) key + sizeof(DnsResourceKey); | |
170 | ||
171 | if (dns_name_is_root(name)) | |
172 | return "."; | |
173 | else | |
174 | return name; | |
175 | } | |
176 | ||
28b9b764 LP |
177 | bool dns_resource_key_is_address(const DnsResourceKey *key) { |
178 | assert(key); | |
179 | ||
180 | /* Check if this is an A or AAAA resource key */ | |
181 | ||
182 | return key->class == DNS_CLASS_IN && IN_SET(key->type, DNS_TYPE_A, DNS_TYPE_AAAA); | |
183 | } | |
184 | ||
faa133f3 LP |
185 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) { |
186 | int r; | |
187 | ||
4d247a6c LP |
188 | if (a == b) |
189 | return 1; | |
190 | ||
1c02e7ba | 191 | r = dns_name_equal(dns_resource_key_name(a), dns_resource_key_name(b)); |
faa133f3 LP |
192 | if (r <= 0) |
193 | return r; | |
194 | ||
195 | if (a->class != b->class) | |
196 | return 0; | |
197 | ||
198 | if (a->type != b->type) | |
199 | return 0; | |
200 | ||
201 | return 1; | |
202 | } | |
203 | ||
105e1512 | 204 | int dns_resource_key_match_rr(const DnsResourceKey *key, DnsResourceRecord *rr, const char *search_domain) { |
801ad6a6 LP |
205 | int r; |
206 | ||
faa133f3 LP |
207 | assert(key); |
208 | assert(rr); | |
209 | ||
4d247a6c LP |
210 | if (key == rr->key) |
211 | return 1; | |
212 | ||
801ad6a6 LP |
213 | /* Checks if an rr matches the specified key. If a search |
214 | * domain is specified, it will also be checked if the key | |
215 | * with the search domain suffixed might match the RR. */ | |
216 | ||
faa133f3 LP |
217 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) |
218 | return 0; | |
219 | ||
220 | if (rr->key->type != key->type && key->type != DNS_TYPE_ANY) | |
221 | return 0; | |
222 | ||
1c02e7ba | 223 | r = dns_name_equal(dns_resource_key_name(rr->key), dns_resource_key_name(key)); |
801ad6a6 LP |
224 | if (r != 0) |
225 | return r; | |
226 | ||
227 | if (search_domain) { | |
228 | _cleanup_free_ char *joined = NULL; | |
229 | ||
1c02e7ba | 230 | r = dns_name_concat(dns_resource_key_name(key), search_domain, &joined); |
801ad6a6 LP |
231 | if (r < 0) |
232 | return r; | |
233 | ||
1c02e7ba | 234 | return dns_name_equal(dns_resource_key_name(rr->key), joined); |
801ad6a6 LP |
235 | } |
236 | ||
237 | return 0; | |
faa133f3 LP |
238 | } |
239 | ||
5d27351f | 240 | int dns_resource_key_match_cname_or_dname(const DnsResourceKey *key, const DnsResourceKey *cname, const char *search_domain) { |
801ad6a6 LP |
241 | int r; |
242 | ||
faa133f3 | 243 | assert(key); |
5d27351f | 244 | assert(cname); |
faa133f3 | 245 | |
5d27351f | 246 | if (cname->class != key->class && key->class != DNS_CLASS_ANY) |
faa133f3 LP |
247 | return 0; |
248 | ||
5d27351f | 249 | if (cname->type == DNS_TYPE_CNAME) |
1c02e7ba | 250 | r = dns_name_equal(dns_resource_key_name(key), dns_resource_key_name(cname)); |
5d27351f | 251 | else if (cname->type == DNS_TYPE_DNAME) |
1c02e7ba | 252 | r = dns_name_endswith(dns_resource_key_name(key), dns_resource_key_name(cname)); |
58db254a | 253 | else |
faa133f3 | 254 | return 0; |
801ad6a6 LP |
255 | |
256 | if (r != 0) | |
257 | return r; | |
258 | ||
259 | if (search_domain) { | |
260 | _cleanup_free_ char *joined = NULL; | |
261 | ||
1c02e7ba | 262 | r = dns_name_concat(dns_resource_key_name(key), search_domain, &joined); |
801ad6a6 LP |
263 | if (r < 0) |
264 | return r; | |
265 | ||
5d27351f | 266 | if (cname->type == DNS_TYPE_CNAME) |
1c02e7ba | 267 | return dns_name_equal(joined, dns_resource_key_name(cname)); |
5d27351f | 268 | else if (cname->type == DNS_TYPE_DNAME) |
1c02e7ba | 269 | return dns_name_endswith(joined, dns_resource_key_name(cname)); |
801ad6a6 LP |
270 | } |
271 | ||
272 | return 0; | |
547973de LP |
273 | } |
274 | ||
275 | int dns_resource_key_match_soa(const DnsResourceKey *key, const DnsResourceKey *soa) { | |
276 | assert(soa); | |
277 | assert(key); | |
278 | ||
279 | /* Checks whether 'soa' is a SOA record for the specified key. */ | |
280 | ||
65b200e7 | 281 | if (soa->class != key->class) |
547973de | 282 | return 0; |
801ad6a6 | 283 | |
547973de LP |
284 | if (soa->type != DNS_TYPE_SOA) |
285 | return 0; | |
286 | ||
1c02e7ba | 287 | return dns_name_endswith(dns_resource_key_name(key), dns_resource_key_name(soa)); |
74b2466e LP |
288 | } |
289 | ||
b826ab58 | 290 | static void dns_resource_key_hash_func(const void *i, struct siphash *state) { |
322345fd | 291 | const DnsResourceKey *k = i; |
322345fd | 292 | |
b826ab58 | 293 | assert(k); |
322345fd | 294 | |
1c02e7ba | 295 | dns_name_hash_func(dns_resource_key_name(k), state); |
b826ab58 TG |
296 | siphash24_compress(&k->class, sizeof(k->class), state); |
297 | siphash24_compress(&k->type, sizeof(k->type), state); | |
322345fd LP |
298 | } |
299 | ||
d5099efc | 300 | static int dns_resource_key_compare_func(const void *a, const void *b) { |
322345fd LP |
301 | const DnsResourceKey *x = a, *y = b; |
302 | int ret; | |
303 | ||
1c02e7ba | 304 | ret = dns_name_compare_func(dns_resource_key_name(x), dns_resource_key_name(y)); |
322345fd LP |
305 | if (ret != 0) |
306 | return ret; | |
307 | ||
308 | if (x->type < y->type) | |
309 | return -1; | |
310 | if (x->type > y->type) | |
311 | return 1; | |
312 | ||
313 | if (x->class < y->class) | |
314 | return -1; | |
315 | if (x->class > y->class) | |
316 | return 1; | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
d5099efc MS |
321 | const struct hash_ops dns_resource_key_hash_ops = { |
322 | .hash = dns_resource_key_hash_func, | |
323 | .compare = dns_resource_key_compare_func | |
324 | }; | |
325 | ||
202b76ae | 326 | char* dns_resource_key_to_string(const DnsResourceKey *key, char *buf, size_t buf_size) { |
1c02e7ba | 327 | const char *c, *t; |
202b76ae | 328 | char *ans = buf; |
2d4c5cbc | 329 | |
6af47493 LP |
330 | /* If we cannot convert the CLASS/TYPE into a known string, |
331 | use the format recommended by RFC 3597, Section 5. */ | |
332 | ||
2d4c5cbc | 333 | c = dns_class_to_string(key->class); |
2d4c5cbc | 334 | t = dns_type_to_string(key->type); |
2d4c5cbc | 335 | |
202b76ae ZJS |
336 | snprintf(buf, buf_size, "%s %s%s%.0u %s%s%.0u", |
337 | dns_resource_key_name(key), | |
338 | c ?: "", c ? "" : "CLASS", c ? 0 : key->class, | |
339 | t ?: "", t ? "" : "TYPE", t ? 0 : key->class); | |
2d4c5cbc | 340 | |
202b76ae | 341 | return ans; |
2d4c5cbc LP |
342 | } |
343 | ||
f57e3cd5 LP |
344 | bool dns_resource_key_reduce(DnsResourceKey **a, DnsResourceKey **b) { |
345 | assert(a); | |
346 | assert(b); | |
347 | ||
348 | /* Try to replace one RR key by another if they are identical, thus saving a bit of memory. Note that we do | |
349 | * this only for RR keys, not for RRs themselves, as they carry a lot of additional metadata (where they come | |
350 | * from, validity data, and suchlike), and cannot be replaced so easily by other RRs that have the same | |
351 | * superficial data. */ | |
352 | ||
353 | if (!*a) | |
354 | return false; | |
355 | if (!*b) | |
356 | return false; | |
357 | ||
358 | /* We refuse merging const keys */ | |
359 | if ((*a)->n_ref == (unsigned) -1) | |
360 | return false; | |
361 | if ((*b)->n_ref == (unsigned) -1) | |
362 | return false; | |
363 | ||
364 | /* Already the same? */ | |
365 | if (*a == *b) | |
366 | return true; | |
367 | ||
368 | /* Are they really identical? */ | |
369 | if (dns_resource_key_equal(*a, *b) <= 0) | |
370 | return false; | |
371 | ||
372 | /* Keep the one which already has more references. */ | |
373 | if ((*a)->n_ref > (*b)->n_ref) { | |
374 | dns_resource_key_unref(*b); | |
375 | *b = dns_resource_key_ref(*a); | |
376 | } else { | |
377 | dns_resource_key_unref(*a); | |
378 | *a = dns_resource_key_ref(*b); | |
379 | } | |
380 | ||
381 | return true; | |
382 | } | |
383 | ||
faa133f3 | 384 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { |
74b2466e LP |
385 | DnsResourceRecord *rr; |
386 | ||
387 | rr = new0(DnsResourceRecord, 1); | |
388 | if (!rr) | |
389 | return NULL; | |
390 | ||
391 | rr->n_ref = 1; | |
faa133f3 | 392 | rr->key = dns_resource_key_ref(key); |
ee3d6aff | 393 | rr->expiry = USEC_INFINITY; |
97c67192 | 394 | rr->n_skip_labels_signer = rr->n_skip_labels_source = (unsigned) -1; |
faa133f3 | 395 | |
74b2466e LP |
396 | return rr; |
397 | } | |
398 | ||
8bf52d3d LP |
399 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) { |
400 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
401 | ||
402 | key = dns_resource_key_new(class, type, name); | |
403 | if (!key) | |
404 | return NULL; | |
405 | ||
406 | return dns_resource_record_new(key); | |
407 | } | |
408 | ||
74b2466e LP |
409 | DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) { |
410 | if (!rr) | |
411 | return NULL; | |
412 | ||
413 | assert(rr->n_ref > 0); | |
414 | rr->n_ref++; | |
415 | ||
416 | return rr; | |
417 | } | |
418 | ||
419 | DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) { | |
420 | if (!rr) | |
421 | return NULL; | |
422 | ||
423 | assert(rr->n_ref > 0); | |
424 | ||
425 | if (rr->n_ref > 1) { | |
426 | rr->n_ref--; | |
427 | return NULL; | |
428 | } | |
429 | ||
faa133f3 | 430 | if (rr->key) { |
9de3e329 | 431 | switch(rr->key->type) { |
9c92ce6d LP |
432 | |
433 | case DNS_TYPE_SRV: | |
434 | free(rr->srv.name); | |
435 | break; | |
436 | ||
9de3e329 ZJS |
437 | case DNS_TYPE_PTR: |
438 | case DNS_TYPE_NS: | |
439 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 440 | case DNS_TYPE_DNAME: |
faa133f3 | 441 | free(rr->ptr.name); |
9de3e329 | 442 | break; |
9c92ce6d | 443 | |
9de3e329 | 444 | case DNS_TYPE_HINFO: |
faa133f3 LP |
445 | free(rr->hinfo.cpu); |
446 | free(rr->hinfo.os); | |
9de3e329 | 447 | break; |
9c92ce6d | 448 | |
9de3e329 | 449 | case DNS_TYPE_TXT: |
9c92ce6d | 450 | case DNS_TYPE_SPF: |
2001c805 | 451 | dns_txt_item_free_all(rr->txt.items); |
9de3e329 | 452 | break; |
9c92ce6d | 453 | |
9de3e329 | 454 | case DNS_TYPE_SOA: |
7e8e0422 LP |
455 | free(rr->soa.mname); |
456 | free(rr->soa.rname); | |
9de3e329 | 457 | break; |
9c92ce6d | 458 | |
9de3e329 | 459 | case DNS_TYPE_MX: |
946c7094 | 460 | free(rr->mx.exchange); |
9de3e329 | 461 | break; |
9c92ce6d | 462 | |
abf126a3 TG |
463 | case DNS_TYPE_DS: |
464 | free(rr->ds.digest); | |
465 | break; | |
466 | ||
42cc2eeb | 467 | case DNS_TYPE_SSHFP: |
549c1a25 | 468 | free(rr->sshfp.fingerprint); |
42cc2eeb LP |
469 | break; |
470 | ||
8db0d2f5 ZJS |
471 | case DNS_TYPE_DNSKEY: |
472 | free(rr->dnskey.key); | |
473 | break; | |
474 | ||
151226ab ZJS |
475 | case DNS_TYPE_RRSIG: |
476 | free(rr->rrsig.signer); | |
477 | free(rr->rrsig.signature); | |
478 | break; | |
479 | ||
50f1e641 TG |
480 | case DNS_TYPE_NSEC: |
481 | free(rr->nsec.next_domain_name); | |
482 | bitmap_free(rr->nsec.types); | |
483 | break; | |
484 | ||
5d45a880 TG |
485 | case DNS_TYPE_NSEC3: |
486 | free(rr->nsec3.next_hashed_name); | |
487 | free(rr->nsec3.salt); | |
488 | bitmap_free(rr->nsec3.types); | |
489 | break; | |
490 | ||
0dae31d4 | 491 | case DNS_TYPE_LOC: |
9de3e329 ZJS |
492 | case DNS_TYPE_A: |
493 | case DNS_TYPE_AAAA: | |
494 | break; | |
9c92ce6d | 495 | |
48d45d2b ZJS |
496 | case DNS_TYPE_TLSA: |
497 | free(rr->tlsa.data); | |
498 | break; | |
499 | ||
95052df3 ZJS |
500 | case DNS_TYPE_CAA: |
501 | free(rr->caa.tag); | |
502 | free(rr->caa.value); | |
503 | break; | |
504 | ||
d93a16b8 | 505 | case DNS_TYPE_OPENPGPKEY: |
9de3e329 | 506 | default: |
faa133f3 | 507 | free(rr->generic.data); |
9de3e329 | 508 | } |
322345fd | 509 | |
a8812dd7 | 510 | free(rr->wire_format); |
faa133f3 LP |
511 | dns_resource_key_unref(rr->key); |
512 | } | |
322345fd | 513 | |
7b50eb2e | 514 | free(rr->to_string); |
6b430fdb | 515 | return mfree(rr); |
322345fd LP |
516 | } |
517 | ||
623a4c97 LP |
518 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) { |
519 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
520 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; | |
521 | _cleanup_free_ char *ptr = NULL; | |
522 | int r; | |
523 | ||
524 | assert(ret); | |
525 | assert(address); | |
526 | assert(hostname); | |
527 | ||
528 | r = dns_name_reverse(family, address, &ptr); | |
529 | if (r < 0) | |
530 | return r; | |
531 | ||
532 | key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr); | |
533 | if (!key) | |
534 | return -ENOMEM; | |
535 | ||
536 | ptr = NULL; | |
537 | ||
538 | rr = dns_resource_record_new(key); | |
539 | if (!rr) | |
540 | return -ENOMEM; | |
541 | ||
542 | rr->ptr.name = strdup(hostname); | |
543 | if (!rr->ptr.name) | |
544 | return -ENOMEM; | |
545 | ||
546 | *ret = rr; | |
547 | rr = NULL; | |
548 | ||
549 | return 0; | |
550 | } | |
551 | ||
78c6a153 LP |
552 | int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name) { |
553 | DnsResourceRecord *rr; | |
554 | ||
555 | assert(ret); | |
556 | assert(address); | |
557 | assert(family); | |
558 | ||
559 | if (family == AF_INET) { | |
560 | ||
561 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, name); | |
562 | if (!rr) | |
563 | return -ENOMEM; | |
564 | ||
565 | rr->a.in_addr = address->in; | |
566 | ||
567 | } else if (family == AF_INET6) { | |
568 | ||
569 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, name); | |
570 | if (!rr) | |
571 | return -ENOMEM; | |
572 | ||
573 | rr->aaaa.in6_addr = address->in6; | |
574 | } else | |
575 | return -EAFNOSUPPORT; | |
576 | ||
577 | *ret = rr; | |
578 | ||
579 | return 0; | |
580 | } | |
581 | ||
a43a068a ZJS |
582 | #define FIELD_EQUAL(a, b, field) \ |
583 | ((a).field ## _size == (b).field ## _size && \ | |
584 | memcmp((a).field, (b).field, (a).field ## _size) == 0) | |
585 | ||
322345fd LP |
586 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { |
587 | int r; | |
588 | ||
589 | assert(a); | |
590 | assert(b); | |
591 | ||
4d247a6c LP |
592 | if (a == b) |
593 | return 1; | |
594 | ||
faa133f3 | 595 | r = dns_resource_key_equal(a->key, b->key); |
322345fd LP |
596 | if (r <= 0) |
597 | return r; | |
598 | ||
fd0b4602 LP |
599 | if (a->unparseable != b->unparseable) |
600 | return 0; | |
601 | ||
602 | switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) { | |
2d4c5cbc | 603 | |
9c92ce6d LP |
604 | case DNS_TYPE_SRV: |
605 | r = dns_name_equal(a->srv.name, b->srv.name); | |
606 | if (r <= 0) | |
607 | return r; | |
608 | ||
609 | return a->srv.priority == b->srv.priority && | |
610 | a->srv.weight == b->srv.weight && | |
611 | a->srv.port == b->srv.port; | |
612 | ||
2d4c5cbc LP |
613 | case DNS_TYPE_PTR: |
614 | case DNS_TYPE_NS: | |
615 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 616 | case DNS_TYPE_DNAME: |
322345fd | 617 | return dns_name_equal(a->ptr.name, b->ptr.name); |
2d4c5cbc LP |
618 | |
619 | case DNS_TYPE_HINFO: | |
620 | return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && | |
621 | strcaseeq(a->hinfo.os, b->hinfo.os); | |
622 | ||
9de3e329 | 623 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
0f84a72e | 624 | case DNS_TYPE_TXT: |
2001c805 | 625 | return dns_txt_item_equal(a->txt.items, b->txt.items); |
2e276efc | 626 | |
2d4c5cbc | 627 | case DNS_TYPE_A: |
322345fd | 628 | return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; |
2d4c5cbc LP |
629 | |
630 | case DNS_TYPE_AAAA: | |
322345fd | 631 | return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; |
2d4c5cbc LP |
632 | |
633 | case DNS_TYPE_SOA: | |
7e8e0422 LP |
634 | r = dns_name_equal(a->soa.mname, b->soa.mname); |
635 | if (r <= 0) | |
636 | return r; | |
637 | r = dns_name_equal(a->soa.rname, b->soa.rname); | |
638 | if (r <= 0) | |
639 | return r; | |
640 | ||
641 | return a->soa.serial == b->soa.serial && | |
642 | a->soa.refresh == b->soa.refresh && | |
643 | a->soa.retry == b->soa.retry && | |
644 | a->soa.expire == b->soa.expire && | |
645 | a->soa.minimum == b->soa.minimum; | |
9c92ce6d | 646 | |
946c7094 ZJS |
647 | case DNS_TYPE_MX: |
648 | if (a->mx.priority != b->mx.priority) | |
649 | return 0; | |
650 | ||
651 | return dns_name_equal(a->mx.exchange, b->mx.exchange); | |
652 | ||
0dae31d4 ZJS |
653 | case DNS_TYPE_LOC: |
654 | assert(a->loc.version == b->loc.version); | |
655 | ||
656 | return a->loc.size == b->loc.size && | |
657 | a->loc.horiz_pre == b->loc.horiz_pre && | |
658 | a->loc.vert_pre == b->loc.vert_pre && | |
659 | a->loc.latitude == b->loc.latitude && | |
660 | a->loc.longitude == b->loc.longitude && | |
661 | a->loc.altitude == b->loc.altitude; | |
662 | ||
abf126a3 TG |
663 | case DNS_TYPE_DS: |
664 | return a->ds.key_tag == b->ds.key_tag && | |
665 | a->ds.algorithm == b->ds.algorithm && | |
666 | a->ds.digest_type == b->ds.digest_type && | |
a43a068a | 667 | FIELD_EQUAL(a->ds, b->ds, digest); |
abf126a3 | 668 | |
42cc2eeb LP |
669 | case DNS_TYPE_SSHFP: |
670 | return a->sshfp.algorithm == b->sshfp.algorithm && | |
671 | a->sshfp.fptype == b->sshfp.fptype && | |
a43a068a | 672 | FIELD_EQUAL(a->sshfp, b->sshfp, fingerprint); |
42cc2eeb | 673 | |
8db0d2f5 | 674 | case DNS_TYPE_DNSKEY: |
f91dc240 LP |
675 | return a->dnskey.flags == b->dnskey.flags && |
676 | a->dnskey.protocol == b->dnskey.protocol && | |
8db0d2f5 | 677 | a->dnskey.algorithm == b->dnskey.algorithm && |
a43a068a | 678 | FIELD_EQUAL(a->dnskey, b->dnskey, key); |
8db0d2f5 | 679 | |
151226ab ZJS |
680 | case DNS_TYPE_RRSIG: |
681 | /* do the fast comparisons first */ | |
a43a068a ZJS |
682 | return a->rrsig.type_covered == b->rrsig.type_covered && |
683 | a->rrsig.algorithm == b->rrsig.algorithm && | |
684 | a->rrsig.labels == b->rrsig.labels && | |
685 | a->rrsig.original_ttl == b->rrsig.original_ttl && | |
686 | a->rrsig.expiration == b->rrsig.expiration && | |
687 | a->rrsig.inception == b->rrsig.inception && | |
688 | a->rrsig.key_tag == b->rrsig.key_tag && | |
689 | FIELD_EQUAL(a->rrsig, b->rrsig, signature) && | |
690 | dns_name_equal(a->rrsig.signer, b->rrsig.signer); | |
151226ab | 691 | |
50f1e641 TG |
692 | case DNS_TYPE_NSEC: |
693 | return dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name) && | |
694 | bitmap_equal(a->nsec.types, b->nsec.types); | |
695 | ||
5d45a880 TG |
696 | case DNS_TYPE_NSEC3: |
697 | return a->nsec3.algorithm == b->nsec3.algorithm && | |
a43a068a ZJS |
698 | a->nsec3.flags == b->nsec3.flags && |
699 | a->nsec3.iterations == b->nsec3.iterations && | |
700 | FIELD_EQUAL(a->nsec3, b->nsec3, salt) && | |
701 | FIELD_EQUAL(a->nsec3, b->nsec3, next_hashed_name) && | |
702 | bitmap_equal(a->nsec3.types, b->nsec3.types); | |
5d45a880 | 703 | |
48d45d2b ZJS |
704 | case DNS_TYPE_TLSA: |
705 | return a->tlsa.cert_usage == b->tlsa.cert_usage && | |
706 | a->tlsa.selector == b->tlsa.selector && | |
707 | a->tlsa.matching_type == b->tlsa.matching_type && | |
a43a068a | 708 | FIELD_EQUAL(a->tlsa, b->tlsa, data); |
48d45d2b | 709 | |
95052df3 ZJS |
710 | case DNS_TYPE_CAA: |
711 | return a->caa.flags == b->caa.flags && | |
712 | streq(a->caa.tag, b->caa.tag) && | |
713 | FIELD_EQUAL(a->caa, b->caa, value); | |
714 | ||
715 | case DNS_TYPE_OPENPGPKEY: | |
2d4c5cbc | 716 | default: |
a43a068a | 717 | return FIELD_EQUAL(a->generic, b->generic, data); |
2d4c5cbc | 718 | } |
322345fd LP |
719 | } |
720 | ||
0dae31d4 ZJS |
721 | static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude, |
722 | uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) { | |
723 | char *s; | |
724 | char NS = latitude >= 1U<<31 ? 'N' : 'S'; | |
725 | char EW = longitude >= 1U<<31 ? 'E' : 'W'; | |
726 | ||
727 | int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude); | |
728 | int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude); | |
729 | double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude); | |
730 | double siz = (size >> 4) * exp10((double) (size & 0xF)); | |
731 | double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF)); | |
732 | double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF)); | |
733 | ||
734 | if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm", | |
735 | (lat / 60000 / 60), | |
736 | (lat / 60000) % 60, | |
737 | (lat % 60000) / 1000., | |
738 | NS, | |
739 | (lon / 60000 / 60), | |
740 | (lon / 60000) % 60, | |
741 | (lon % 60000) / 1000., | |
742 | EW, | |
743 | alt / 100., | |
744 | siz / 100., | |
745 | hor / 100., | |
746 | ver / 100.) < 0) | |
747 | return NULL; | |
748 | ||
749 | return s; | |
750 | } | |
751 | ||
7c6423e1 TG |
752 | static int format_timestamp_dns(char *buf, size_t l, time_t sec) { |
753 | struct tm tm; | |
754 | ||
755 | assert(buf); | |
756 | assert(l > strlen("YYYYMMDDHHmmSS")); | |
757 | ||
758 | if (!gmtime_r(&sec, &tm)) | |
759 | return -EINVAL; | |
760 | ||
761 | if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0) | |
762 | return -EINVAL; | |
763 | ||
764 | return 0; | |
765 | } | |
766 | ||
50f1e641 TG |
767 | static char *format_types(Bitmap *types) { |
768 | _cleanup_strv_free_ char **strv = NULL; | |
769 | _cleanup_free_ char *str = NULL; | |
cb57dd41 | 770 | Iterator i; |
50f1e641 TG |
771 | unsigned type; |
772 | int r; | |
773 | ||
cb57dd41 | 774 | BITMAP_FOREACH(type, types, i) { |
50f1e641 | 775 | if (dns_type_to_string(type)) { |
2c1fb4f7 | 776 | r = strv_extend(&strv, dns_type_to_string(type)); |
50f1e641 TG |
777 | if (r < 0) |
778 | return NULL; | |
779 | } else { | |
780 | char *t; | |
781 | ||
782 | r = asprintf(&t, "TYPE%u", type); | |
783 | if (r < 0) | |
784 | return NULL; | |
785 | ||
2c1fb4f7 | 786 | r = strv_consume(&strv, t); |
50f1e641 TG |
787 | if (r < 0) |
788 | return NULL; | |
789 | } | |
790 | } | |
791 | ||
792 | str = strv_join(strv, " "); | |
793 | if (!str) | |
794 | return NULL; | |
795 | ||
605405c6 | 796 | return strjoin("( ", str, " )"); |
50f1e641 TG |
797 | } |
798 | ||
2001c805 LP |
799 | static char *format_txt(DnsTxtItem *first) { |
800 | DnsTxtItem *i; | |
801 | size_t c = 1; | |
802 | char *p, *s; | |
803 | ||
804 | LIST_FOREACH(items, i, first) | |
805 | c += i->length * 4 + 3; | |
806 | ||
807 | p = s = new(char, c); | |
808 | if (!s) | |
809 | return NULL; | |
810 | ||
811 | LIST_FOREACH(items, i, first) { | |
812 | size_t j; | |
813 | ||
814 | if (i != first) | |
815 | *(p++) = ' '; | |
816 | ||
817 | *(p++) = '"'; | |
818 | ||
819 | for (j = 0; j < i->length; j++) { | |
820 | if (i->data[j] < ' ' || i->data[j] == '"' || i->data[j] >= 127) { | |
821 | *(p++) = '\\'; | |
822 | *(p++) = '0' + (i->data[j] / 100); | |
823 | *(p++) = '0' + ((i->data[j] / 10) % 10); | |
824 | *(p++) = '0' + (i->data[j] % 10); | |
825 | } else | |
826 | *(p++) = i->data[j]; | |
827 | } | |
828 | ||
829 | *(p++) = '"'; | |
830 | } | |
831 | ||
832 | *p = 0; | |
833 | return s; | |
834 | } | |
835 | ||
7b50eb2e | 836 | const char *dns_resource_record_to_string(DnsResourceRecord *rr) { |
202b76ae ZJS |
837 | _cleanup_free_ char *t = NULL; |
838 | char *s, k[DNS_RESOURCE_KEY_STRING_MAX]; | |
2d4c5cbc | 839 | int r; |
322345fd | 840 | |
2d4c5cbc | 841 | assert(rr); |
322345fd | 842 | |
7b50eb2e LP |
843 | if (rr->to_string) |
844 | return rr->to_string; | |
845 | ||
202b76ae | 846 | dns_resource_key_to_string(rr->key, k, sizeof(k)); |
322345fd | 847 | |
0dae31d4 | 848 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { |
322345fd | 849 | |
9c92ce6d LP |
850 | case DNS_TYPE_SRV: |
851 | r = asprintf(&s, "%s %u %u %u %s", | |
852 | k, | |
853 | rr->srv.priority, | |
854 | rr->srv.weight, | |
855 | rr->srv.port, | |
856 | strna(rr->srv.name)); | |
857 | if (r < 0) | |
7b50eb2e | 858 | return NULL; |
9c92ce6d LP |
859 | break; |
860 | ||
2d4c5cbc LP |
861 | case DNS_TYPE_PTR: |
862 | case DNS_TYPE_NS: | |
863 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 864 | case DNS_TYPE_DNAME: |
605405c6 | 865 | s = strjoin(k, " ", rr->ptr.name); |
2d4c5cbc | 866 | if (!s) |
7b50eb2e | 867 | return NULL; |
322345fd | 868 | |
2d4c5cbc | 869 | break; |
322345fd | 870 | |
2d4c5cbc | 871 | case DNS_TYPE_HINFO: |
605405c6 | 872 | s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os); |
2d4c5cbc | 873 | if (!s) |
7b50eb2e | 874 | return NULL; |
2d4c5cbc | 875 | break; |
322345fd | 876 | |
9de3e329 | 877 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
8db0d2f5 | 878 | case DNS_TYPE_TXT: |
2001c805 | 879 | t = format_txt(rr->txt.items); |
2e276efc | 880 | if (!t) |
7b50eb2e | 881 | return NULL; |
2e276efc | 882 | |
605405c6 | 883 | s = strjoin(k, " ", t); |
2e276efc | 884 | if (!s) |
7b50eb2e | 885 | return NULL; |
2e276efc | 886 | break; |
2e276efc | 887 | |
2d4c5cbc LP |
888 | case DNS_TYPE_A: { |
889 | _cleanup_free_ char *x = NULL; | |
322345fd | 890 | |
2d4c5cbc LP |
891 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x); |
892 | if (r < 0) | |
7b50eb2e | 893 | return NULL; |
322345fd | 894 | |
605405c6 | 895 | s = strjoin(k, " ", x); |
2d4c5cbc | 896 | if (!s) |
7b50eb2e | 897 | return NULL; |
2d4c5cbc LP |
898 | break; |
899 | } | |
322345fd | 900 | |
8db0d2f5 ZJS |
901 | case DNS_TYPE_AAAA: |
902 | r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); | |
2d4c5cbc | 903 | if (r < 0) |
7b50eb2e | 904 | return NULL; |
322345fd | 905 | |
605405c6 | 906 | s = strjoin(k, " ", t); |
2d4c5cbc | 907 | if (!s) |
7b50eb2e | 908 | return NULL; |
2d4c5cbc | 909 | break; |
322345fd | 910 | |
2d4c5cbc LP |
911 | case DNS_TYPE_SOA: |
912 | r = asprintf(&s, "%s %s %s %u %u %u %u %u", | |
913 | k, | |
914 | strna(rr->soa.mname), | |
915 | strna(rr->soa.rname), | |
916 | rr->soa.serial, | |
917 | rr->soa.refresh, | |
918 | rr->soa.retry, | |
919 | rr->soa.expire, | |
920 | rr->soa.minimum); | |
921 | if (r < 0) | |
7b50eb2e | 922 | return NULL; |
2d4c5cbc LP |
923 | break; |
924 | ||
946c7094 ZJS |
925 | case DNS_TYPE_MX: |
926 | r = asprintf(&s, "%s %u %s", | |
927 | k, | |
928 | rr->mx.priority, | |
929 | rr->mx.exchange); | |
930 | if (r < 0) | |
7b50eb2e | 931 | return NULL; |
946c7094 ZJS |
932 | break; |
933 | ||
8db0d2f5 | 934 | case DNS_TYPE_LOC: |
0dae31d4 ZJS |
935 | assert(rr->loc.version == 0); |
936 | ||
8db0d2f5 ZJS |
937 | t = format_location(rr->loc.latitude, |
938 | rr->loc.longitude, | |
939 | rr->loc.altitude, | |
940 | rr->loc.size, | |
941 | rr->loc.horiz_pre, | |
942 | rr->loc.vert_pre); | |
943 | if (!t) | |
7b50eb2e | 944 | return NULL; |
0dae31d4 | 945 | |
605405c6 | 946 | s = strjoin(k, " ", t); |
0dae31d4 | 947 | if (!s) |
7b50eb2e | 948 | return NULL; |
0dae31d4 | 949 | break; |
0dae31d4 | 950 | |
abf126a3 TG |
951 | case DNS_TYPE_DS: |
952 | t = hexmem(rr->ds.digest, rr->ds.digest_size); | |
953 | if (!t) | |
7b50eb2e | 954 | return NULL; |
abf126a3 TG |
955 | |
956 | r = asprintf(&s, "%s %u %u %u %s", | |
957 | k, | |
958 | rr->ds.key_tag, | |
959 | rr->ds.algorithm, | |
960 | rr->ds.digest_type, | |
961 | t); | |
962 | if (r < 0) | |
7b50eb2e | 963 | return NULL; |
abf126a3 TG |
964 | break; |
965 | ||
8db0d2f5 | 966 | case DNS_TYPE_SSHFP: |
549c1a25 | 967 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); |
8db0d2f5 | 968 | if (!t) |
7b50eb2e | 969 | return NULL; |
42cc2eeb LP |
970 | |
971 | r = asprintf(&s, "%s %u %u %s", | |
972 | k, | |
973 | rr->sshfp.algorithm, | |
974 | rr->sshfp.fptype, | |
8db0d2f5 | 975 | t); |
42cc2eeb | 976 | if (r < 0) |
7b50eb2e | 977 | return NULL; |
42cc2eeb | 978 | break; |
42cc2eeb | 979 | |
ff3d6560 | 980 | case DNS_TYPE_DNSKEY: { |
8e54f5d9 | 981 | _cleanup_free_ char *alg = NULL; |
99e5ca6d | 982 | char *ss; |
718af59e | 983 | int n; |
fc8eec10 ZJS |
984 | uint16_t key_tag; |
985 | ||
986 | key_tag = dnssec_keytag(rr, true); | |
ff3d6560 | 987 | |
8e54f5d9 LP |
988 | r = dnssec_algorithm_to_string_alloc(rr->dnskey.algorithm, &alg); |
989 | if (r < 0) | |
990 | return NULL; | |
ff3d6560 | 991 | |
718af59e | 992 | r = asprintf(&s, "%s %u %u %s %n", |
8db0d2f5 | 993 | k, |
f91dc240 LP |
994 | rr->dnskey.flags, |
995 | rr->dnskey.protocol, | |
8e54f5d9 | 996 | alg, |
d7671a3e | 997 | &n); |
8db0d2f5 | 998 | if (r < 0) |
7b50eb2e | 999 | return NULL; |
d7671a3e ZJS |
1000 | |
1001 | r = base64_append(&s, n, | |
1002 | rr->dnskey.key, rr->dnskey.key_size, | |
1003 | 8, columns()); | |
1004 | if (r < 0) | |
1005 | return NULL; | |
1006 | ||
99e5ca6d | 1007 | r = asprintf(&ss, "%s\n" |
718af59e ZJS |
1008 | " -- Flags:%s%s%s\n" |
1009 | " -- Key tag: %u", | |
99e5ca6d | 1010 | s, |
99e5ca6d ZJS |
1011 | rr->dnskey.flags & DNSKEY_FLAG_SEP ? " SEP" : "", |
1012 | rr->dnskey.flags & DNSKEY_FLAG_REVOKE ? " REVOKE" : "", | |
fc8eec10 | 1013 | rr->dnskey.flags & DNSKEY_FLAG_ZONE_KEY ? " ZONE_KEY" : "", |
fc8eec10 | 1014 | key_tag); |
99e5ca6d ZJS |
1015 | if (r < 0) |
1016 | return NULL; | |
1017 | free(s); | |
1018 | s = ss; | |
1019 | ||
8db0d2f5 | 1020 | break; |
ff3d6560 | 1021 | } |
2d4c5cbc | 1022 | |
151226ab | 1023 | case DNS_TYPE_RRSIG: { |
8e54f5d9 | 1024 | _cleanup_free_ char *alg = NULL; |
7c6423e1 | 1025 | char expiration[strlen("YYYYMMDDHHmmSS") + 1], inception[strlen("YYYYMMDDHHmmSS") + 1]; |
8e54f5d9 | 1026 | const char *type; |
d7671a3e | 1027 | int n; |
151226ab ZJS |
1028 | |
1029 | type = dns_type_to_string(rr->rrsig.type_covered); | |
8e54f5d9 LP |
1030 | |
1031 | r = dnssec_algorithm_to_string_alloc(rr->rrsig.algorithm, &alg); | |
1032 | if (r < 0) | |
1033 | return NULL; | |
151226ab | 1034 | |
7c6423e1 TG |
1035 | r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration); |
1036 | if (r < 0) | |
7b50eb2e | 1037 | return NULL; |
7c6423e1 TG |
1038 | |
1039 | r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception); | |
1040 | if (r < 0) | |
7b50eb2e | 1041 | return NULL; |
7c6423e1 | 1042 | |
151226ab ZJS |
1043 | /* TYPE?? follows |
1044 | * http://tools.ietf.org/html/rfc3597#section-5 */ | |
1045 | ||
d7671a3e | 1046 | r = asprintf(&s, "%s %s%.*u %s %u %u %s %s %u %s %n", |
151226ab ZJS |
1047 | k, |
1048 | type ?: "TYPE", | |
1049 | type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, | |
8e54f5d9 | 1050 | alg, |
151226ab ZJS |
1051 | rr->rrsig.labels, |
1052 | rr->rrsig.original_ttl, | |
7c6423e1 TG |
1053 | expiration, |
1054 | inception, | |
151226ab ZJS |
1055 | rr->rrsig.key_tag, |
1056 | rr->rrsig.signer, | |
d7671a3e | 1057 | &n); |
151226ab | 1058 | if (r < 0) |
7b50eb2e | 1059 | return NULL; |
d7671a3e ZJS |
1060 | |
1061 | r = base64_append(&s, n, | |
1062 | rr->rrsig.signature, rr->rrsig.signature_size, | |
1063 | 8, columns()); | |
1064 | if (r < 0) | |
1065 | return NULL; | |
1066 | ||
151226ab ZJS |
1067 | break; |
1068 | } | |
1069 | ||
50f1e641 TG |
1070 | case DNS_TYPE_NSEC: |
1071 | t = format_types(rr->nsec.types); | |
1072 | if (!t) | |
7b50eb2e | 1073 | return NULL; |
50f1e641 TG |
1074 | |
1075 | r = asprintf(&s, "%s %s %s", | |
1076 | k, | |
1077 | rr->nsec.next_domain_name, | |
1078 | t); | |
1079 | if (r < 0) | |
7b50eb2e | 1080 | return NULL; |
50f1e641 TG |
1081 | break; |
1082 | ||
5d45a880 TG |
1083 | case DNS_TYPE_NSEC3: { |
1084 | _cleanup_free_ char *salt = NULL, *hash = NULL; | |
1085 | ||
f5430a3e | 1086 | if (rr->nsec3.salt_size > 0) { |
5d45a880 TG |
1087 | salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size); |
1088 | if (!salt) | |
7b50eb2e | 1089 | return NULL; |
5d45a880 TG |
1090 | } |
1091 | ||
1092 | hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false); | |
1093 | if (!hash) | |
7b50eb2e | 1094 | return NULL; |
5d45a880 TG |
1095 | |
1096 | t = format_types(rr->nsec3.types); | |
1097 | if (!t) | |
7b50eb2e | 1098 | return NULL; |
5d45a880 TG |
1099 | |
1100 | r = asprintf(&s, "%s %"PRIu8" %"PRIu8" %"PRIu16" %s %s %s", | |
1101 | k, | |
1102 | rr->nsec3.algorithm, | |
1103 | rr->nsec3.flags, | |
1104 | rr->nsec3.iterations, | |
f5430a3e | 1105 | rr->nsec3.salt_size > 0 ? salt : "-", |
5d45a880 TG |
1106 | hash, |
1107 | t); | |
1108 | if (r < 0) | |
7b50eb2e | 1109 | return NULL; |
5d45a880 TG |
1110 | |
1111 | break; | |
1112 | } | |
1113 | ||
48d45d2b | 1114 | case DNS_TYPE_TLSA: { |
cfb90da3 | 1115 | const char *cert_usage, *selector, *matching_type; |
48d45d2b | 1116 | |
cfb90da3 ZJS |
1117 | cert_usage = tlsa_cert_usage_to_string(rr->tlsa.cert_usage); |
1118 | selector = tlsa_selector_to_string(rr->tlsa.selector); | |
1119 | matching_type = tlsa_matching_type_to_string(rr->tlsa.matching_type); | |
1120 | ||
236d312b ZJS |
1121 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); |
1122 | if (!t) | |
48d45d2b | 1123 | return NULL; |
cfb90da3 | 1124 | |
236d312b ZJS |
1125 | r = asprintf(&s, |
1126 | "%s %u %u %u %s\n" | |
718af59e ZJS |
1127 | " -- Cert. usage: %s\n" |
1128 | " -- Selector: %s\n" | |
1129 | " -- Matching type: %s", | |
236d312b ZJS |
1130 | k, |
1131 | rr->tlsa.cert_usage, | |
1132 | rr->tlsa.selector, | |
1133 | rr->tlsa.matching_type, | |
1134 | t, | |
718af59e ZJS |
1135 | cert_usage, |
1136 | selector, | |
1137 | matching_type); | |
cfb90da3 ZJS |
1138 | if (r < 0) |
1139 | return NULL; | |
cfb90da3 | 1140 | |
48d45d2b ZJS |
1141 | break; |
1142 | } | |
1143 | ||
95052df3 ZJS |
1144 | case DNS_TYPE_CAA: { |
1145 | _cleanup_free_ char *value; | |
1146 | ||
1147 | value = octescape(rr->caa.value, rr->caa.value_size); | |
1148 | if (!value) | |
1149 | return NULL; | |
1150 | ||
718af59e | 1151 | r = asprintf(&s, "%s %u %s \"%s\"%s%s%s%.0u", |
95052df3 ZJS |
1152 | k, |
1153 | rr->caa.flags, | |
1154 | rr->caa.tag, | |
718af59e ZJS |
1155 | value, |
1156 | rr->caa.flags ? "\n -- Flags:" : "", | |
1157 | rr->caa.flags & CAA_FLAG_CRITICAL ? " critical" : "", | |
1158 | rr->caa.flags & ~CAA_FLAG_CRITICAL ? " " : "", | |
1159 | rr->caa.flags & ~CAA_FLAG_CRITICAL); | |
95052df3 ZJS |
1160 | if (r < 0) |
1161 | return NULL; | |
1162 | ||
1163 | break; | |
1164 | } | |
1165 | ||
d93a16b8 ZJS |
1166 | case DNS_TYPE_OPENPGPKEY: { |
1167 | int n; | |
1168 | ||
1169 | r = asprintf(&s, "%s %n", | |
1170 | k, | |
1171 | &n); | |
1172 | if (r < 0) | |
1173 | return NULL; | |
1174 | ||
1175 | r = base64_append(&s, n, | |
a43a068a | 1176 | rr->generic.data, rr->generic.data_size, |
d93a16b8 ZJS |
1177 | 8, columns()); |
1178 | if (r < 0) | |
1179 | return NULL; | |
1180 | break; | |
1181 | } | |
1182 | ||
8db0d2f5 | 1183 | default: |
a43a068a | 1184 | t = hexmem(rr->generic.data, rr->generic.data_size); |
8db0d2f5 | 1185 | if (!t) |
7b50eb2e | 1186 | return NULL; |
8db0d2f5 | 1187 | |
6af47493 | 1188 | /* Format as documented in RFC 3597, Section 5 */ |
a43a068a | 1189 | r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.data_size, t); |
d23a27a9 | 1190 | if (r < 0) |
7b50eb2e | 1191 | return NULL; |
2d4c5cbc | 1192 | break; |
8db0d2f5 | 1193 | } |
2d4c5cbc | 1194 | |
7b50eb2e LP |
1195 | rr->to_string = s; |
1196 | return s; | |
2d4c5cbc | 1197 | } |
322345fd | 1198 | |
2e74028a ZJS |
1199 | ssize_t dns_resource_record_payload(DnsResourceRecord *rr, void **out) { |
1200 | assert(rr); | |
1201 | assert(out); | |
1202 | ||
1203 | switch(rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { | |
1204 | case DNS_TYPE_SRV: | |
1205 | case DNS_TYPE_PTR: | |
1206 | case DNS_TYPE_NS: | |
1207 | case DNS_TYPE_CNAME: | |
1208 | case DNS_TYPE_DNAME: | |
1209 | case DNS_TYPE_HINFO: | |
1210 | case DNS_TYPE_SPF: | |
1211 | case DNS_TYPE_TXT: | |
1212 | case DNS_TYPE_A: | |
1213 | case DNS_TYPE_AAAA: | |
1214 | case DNS_TYPE_SOA: | |
1215 | case DNS_TYPE_MX: | |
1216 | case DNS_TYPE_LOC: | |
1217 | case DNS_TYPE_DS: | |
2e74028a ZJS |
1218 | case DNS_TYPE_DNSKEY: |
1219 | case DNS_TYPE_RRSIG: | |
1220 | case DNS_TYPE_NSEC: | |
1221 | case DNS_TYPE_NSEC3: | |
1222 | return -EINVAL; | |
1223 | ||
e1caa6e0 ZJS |
1224 | case DNS_TYPE_SSHFP: |
1225 | *out = rr->sshfp.fingerprint; | |
1226 | return rr->sshfp.fingerprint_size; | |
1227 | ||
2e74028a ZJS |
1228 | case DNS_TYPE_TLSA: |
1229 | *out = rr->tlsa.data; | |
1230 | return rr->tlsa.data_size; | |
1231 | ||
1232 | ||
1233 | case DNS_TYPE_OPENPGPKEY: | |
1234 | default: | |
1235 | *out = rr->generic.data; | |
1236 | return rr->generic.data_size; | |
1237 | } | |
1238 | } | |
1239 | ||
a8812dd7 LP |
1240 | int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical) { |
1241 | ||
1242 | DnsPacket packet = { | |
1243 | .n_ref = 1, | |
1244 | .protocol = DNS_PROTOCOL_DNS, | |
1245 | .on_stack = true, | |
1246 | .refuse_compression = true, | |
1247 | .canonical_form = canonical, | |
1248 | }; | |
1249 | ||
1250 | size_t start, rds; | |
1251 | int r; | |
1252 | ||
1253 | assert(rr); | |
1254 | ||
1255 | /* Generates the RR in wire-format, optionally in the | |
1256 | * canonical form as discussed in the DNSSEC RFC 4034, Section | |
1257 | * 6.2. We allocate a throw-away DnsPacket object on the stack | |
1258 | * here, because we need some book-keeping for memory | |
1259 | * management, and can reuse the DnsPacket serializer, that | |
1260 | * can generate the canonical form, too, but also knows label | |
1261 | * compression and suchlike. */ | |
1262 | ||
1263 | if (rr->wire_format && rr->wire_format_canonical == canonical) | |
1264 | return 0; | |
1265 | ||
58ab31d5 | 1266 | r = dns_packet_append_rr(&packet, rr, 0, &start, &rds); |
a8812dd7 LP |
1267 | if (r < 0) |
1268 | return r; | |
1269 | ||
1270 | assert(start == 0); | |
1271 | assert(packet._data); | |
1272 | ||
1273 | free(rr->wire_format); | |
1274 | rr->wire_format = packet._data; | |
1275 | rr->wire_format_size = packet.size; | |
1276 | rr->wire_format_rdata_offset = rds; | |
1277 | rr->wire_format_canonical = canonical; | |
1278 | ||
1279 | packet._data = NULL; | |
1280 | dns_packet_unref(&packet); | |
1281 | ||
1282 | return 0; | |
1283 | } | |
1284 | ||
97c67192 LP |
1285 | int dns_resource_record_signer(DnsResourceRecord *rr, const char **ret) { |
1286 | const char *n; | |
1287 | int r; | |
1288 | ||
1289 | assert(rr); | |
1290 | assert(ret); | |
1291 | ||
1292 | /* Returns the RRset's signer, if it is known. */ | |
1293 | ||
1294 | if (rr->n_skip_labels_signer == (unsigned) -1) | |
1295 | return -ENODATA; | |
1296 | ||
1c02e7ba | 1297 | n = dns_resource_key_name(rr->key); |
97c67192 LP |
1298 | r = dns_name_skip(n, rr->n_skip_labels_signer, &n); |
1299 | if (r < 0) | |
1300 | return r; | |
1301 | if (r == 0) | |
1302 | return -EINVAL; | |
1303 | ||
1304 | *ret = n; | |
1305 | return 0; | |
1306 | } | |
1307 | ||
1308 | int dns_resource_record_source(DnsResourceRecord *rr, const char **ret) { | |
1309 | const char *n; | |
1310 | int r; | |
1311 | ||
1312 | assert(rr); | |
1313 | assert(ret); | |
1314 | ||
1315 | /* Returns the RRset's synthesizing source, if it is known. */ | |
1316 | ||
1317 | if (rr->n_skip_labels_source == (unsigned) -1) | |
1318 | return -ENODATA; | |
1319 | ||
1c02e7ba | 1320 | n = dns_resource_key_name(rr->key); |
97c67192 LP |
1321 | r = dns_name_skip(n, rr->n_skip_labels_source, &n); |
1322 | if (r < 0) | |
1323 | return r; | |
1324 | if (r == 0) | |
1325 | return -EINVAL; | |
1326 | ||
1327 | *ret = n; | |
1328 | return 0; | |
1329 | } | |
1330 | ||
1331 | int dns_resource_record_is_signer(DnsResourceRecord *rr, const char *zone) { | |
1332 | const char *signer; | |
1333 | int r; | |
1334 | ||
ab481675 LP |
1335 | assert(rr); |
1336 | ||
97c67192 LP |
1337 | r = dns_resource_record_signer(rr, &signer); |
1338 | if (r < 0) | |
1339 | return r; | |
1340 | ||
1341 | return dns_name_equal(zone, signer); | |
1342 | } | |
1343 | ||
ab481675 LP |
1344 | int dns_resource_record_is_synthetic(DnsResourceRecord *rr) { |
1345 | int r; | |
1346 | ||
1347 | assert(rr); | |
1348 | ||
1349 | /* Returns > 0 if the RR is generated from a wildcard, and is not the asterisk name itself */ | |
1350 | ||
1351 | if (rr->n_skip_labels_source == (unsigned) -1) | |
1352 | return -ENODATA; | |
1353 | ||
1354 | if (rr->n_skip_labels_source == 0) | |
1355 | return 0; | |
1356 | ||
1357 | if (rr->n_skip_labels_source > 1) | |
1358 | return 1; | |
1359 | ||
1c02e7ba | 1360 | r = dns_name_startswith(dns_resource_key_name(rr->key), "*"); |
ab481675 LP |
1361 | if (r < 0) |
1362 | return r; | |
1363 | ||
1364 | return !r; | |
1365 | } | |
1366 | ||
6d99904f | 1367 | void dns_resource_record_hash_func(const void *i, struct siphash *state) { |
c9c72065 LP |
1368 | const DnsResourceRecord *rr = i; |
1369 | ||
1370 | assert(rr); | |
1371 | ||
1372 | dns_resource_key_hash_func(rr->key, state); | |
1373 | ||
1374 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { | |
1375 | ||
1376 | case DNS_TYPE_SRV: | |
1377 | siphash24_compress(&rr->srv.priority, sizeof(rr->srv.priority), state); | |
1378 | siphash24_compress(&rr->srv.weight, sizeof(rr->srv.weight), state); | |
1379 | siphash24_compress(&rr->srv.port, sizeof(rr->srv.port), state); | |
1380 | dns_name_hash_func(rr->srv.name, state); | |
1381 | break; | |
1382 | ||
1383 | case DNS_TYPE_PTR: | |
1384 | case DNS_TYPE_NS: | |
1385 | case DNS_TYPE_CNAME: | |
1386 | case DNS_TYPE_DNAME: | |
1387 | dns_name_hash_func(rr->ptr.name, state); | |
1388 | break; | |
1389 | ||
1390 | case DNS_TYPE_HINFO: | |
1391 | string_hash_func(rr->hinfo.cpu, state); | |
1392 | string_hash_func(rr->hinfo.os, state); | |
1393 | break; | |
1394 | ||
1395 | case DNS_TYPE_TXT: | |
1396 | case DNS_TYPE_SPF: { | |
1397 | DnsTxtItem *j; | |
1398 | ||
1399 | LIST_FOREACH(items, j, rr->txt.items) { | |
1400 | siphash24_compress(j->data, j->length, state); | |
1401 | ||
d5115566 LP |
1402 | /* Add an extra NUL byte, so that "a" followed by "b" doesn't result in the same hash as "ab" |
1403 | * followed by "". */ | |
1404 | siphash24_compress_byte(0, state); | |
c9c72065 LP |
1405 | } |
1406 | break; | |
1407 | } | |
1408 | ||
1409 | case DNS_TYPE_A: | |
1410 | siphash24_compress(&rr->a.in_addr, sizeof(rr->a.in_addr), state); | |
1411 | break; | |
1412 | ||
1413 | case DNS_TYPE_AAAA: | |
1414 | siphash24_compress(&rr->aaaa.in6_addr, sizeof(rr->aaaa.in6_addr), state); | |
1415 | break; | |
1416 | ||
1417 | case DNS_TYPE_SOA: | |
1418 | dns_name_hash_func(rr->soa.mname, state); | |
1419 | dns_name_hash_func(rr->soa.rname, state); | |
1420 | siphash24_compress(&rr->soa.serial, sizeof(rr->soa.serial), state); | |
1421 | siphash24_compress(&rr->soa.refresh, sizeof(rr->soa.refresh), state); | |
1422 | siphash24_compress(&rr->soa.retry, sizeof(rr->soa.retry), state); | |
1423 | siphash24_compress(&rr->soa.expire, sizeof(rr->soa.expire), state); | |
1424 | siphash24_compress(&rr->soa.minimum, sizeof(rr->soa.minimum), state); | |
1425 | break; | |
1426 | ||
1427 | case DNS_TYPE_MX: | |
1428 | siphash24_compress(&rr->mx.priority, sizeof(rr->mx.priority), state); | |
1429 | dns_name_hash_func(rr->mx.exchange, state); | |
1430 | break; | |
1431 | ||
1432 | case DNS_TYPE_LOC: | |
1433 | siphash24_compress(&rr->loc.version, sizeof(rr->loc.version), state); | |
1434 | siphash24_compress(&rr->loc.size, sizeof(rr->loc.size), state); | |
1435 | siphash24_compress(&rr->loc.horiz_pre, sizeof(rr->loc.horiz_pre), state); | |
1436 | siphash24_compress(&rr->loc.vert_pre, sizeof(rr->loc.vert_pre), state); | |
1437 | siphash24_compress(&rr->loc.latitude, sizeof(rr->loc.latitude), state); | |
1438 | siphash24_compress(&rr->loc.longitude, sizeof(rr->loc.longitude), state); | |
1439 | siphash24_compress(&rr->loc.altitude, sizeof(rr->loc.altitude), state); | |
1440 | break; | |
1441 | ||
1442 | case DNS_TYPE_SSHFP: | |
1443 | siphash24_compress(&rr->sshfp.algorithm, sizeof(rr->sshfp.algorithm), state); | |
1444 | siphash24_compress(&rr->sshfp.fptype, sizeof(rr->sshfp.fptype), state); | |
1445 | siphash24_compress(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size, state); | |
1446 | break; | |
1447 | ||
1448 | case DNS_TYPE_DNSKEY: | |
1449 | siphash24_compress(&rr->dnskey.flags, sizeof(rr->dnskey.flags), state); | |
1450 | siphash24_compress(&rr->dnskey.protocol, sizeof(rr->dnskey.protocol), state); | |
1451 | siphash24_compress(&rr->dnskey.algorithm, sizeof(rr->dnskey.algorithm), state); | |
1452 | siphash24_compress(rr->dnskey.key, rr->dnskey.key_size, state); | |
1453 | break; | |
1454 | ||
1455 | case DNS_TYPE_RRSIG: | |
1456 | siphash24_compress(&rr->rrsig.type_covered, sizeof(rr->rrsig.type_covered), state); | |
1457 | siphash24_compress(&rr->rrsig.algorithm, sizeof(rr->rrsig.algorithm), state); | |
1458 | siphash24_compress(&rr->rrsig.labels, sizeof(rr->rrsig.labels), state); | |
1459 | siphash24_compress(&rr->rrsig.original_ttl, sizeof(rr->rrsig.original_ttl), state); | |
1460 | siphash24_compress(&rr->rrsig.expiration, sizeof(rr->rrsig.expiration), state); | |
1461 | siphash24_compress(&rr->rrsig.inception, sizeof(rr->rrsig.inception), state); | |
1462 | siphash24_compress(&rr->rrsig.key_tag, sizeof(rr->rrsig.key_tag), state); | |
1463 | dns_name_hash_func(rr->rrsig.signer, state); | |
1464 | siphash24_compress(rr->rrsig.signature, rr->rrsig.signature_size, state); | |
1465 | break; | |
1466 | ||
1467 | case DNS_TYPE_NSEC: | |
1468 | dns_name_hash_func(rr->nsec.next_domain_name, state); | |
1469 | /* FIXME: we leave out the type bitmap here. Hash | |
1470 | * would be better if we'd take it into account | |
1471 | * too. */ | |
1472 | break; | |
1473 | ||
1474 | case DNS_TYPE_DS: | |
1475 | siphash24_compress(&rr->ds.key_tag, sizeof(rr->ds.key_tag), state); | |
1476 | siphash24_compress(&rr->ds.algorithm, sizeof(rr->ds.algorithm), state); | |
1477 | siphash24_compress(&rr->ds.digest_type, sizeof(rr->ds.digest_type), state); | |
1478 | siphash24_compress(rr->ds.digest, rr->ds.digest_size, state); | |
1479 | break; | |
1480 | ||
1481 | case DNS_TYPE_NSEC3: | |
1482 | siphash24_compress(&rr->nsec3.algorithm, sizeof(rr->nsec3.algorithm), state); | |
1483 | siphash24_compress(&rr->nsec3.flags, sizeof(rr->nsec3.flags), state); | |
1484 | siphash24_compress(&rr->nsec3.iterations, sizeof(rr->nsec3.iterations), state); | |
1485 | siphash24_compress(rr->nsec3.salt, rr->nsec3.salt_size, state); | |
1486 | siphash24_compress(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, state); | |
1487 | /* FIXME: We leave the bitmaps out */ | |
1488 | break; | |
48d45d2b ZJS |
1489 | |
1490 | case DNS_TYPE_TLSA: | |
1491 | siphash24_compress(&rr->tlsa.cert_usage, sizeof(rr->tlsa.cert_usage), state); | |
1492 | siphash24_compress(&rr->tlsa.selector, sizeof(rr->tlsa.selector), state); | |
1493 | siphash24_compress(&rr->tlsa.matching_type, sizeof(rr->tlsa.matching_type), state); | |
fa45182e | 1494 | siphash24_compress(rr->tlsa.data, rr->tlsa.data_size, state); |
48d45d2b | 1495 | break; |
c9c72065 | 1496 | |
95052df3 ZJS |
1497 | case DNS_TYPE_CAA: |
1498 | siphash24_compress(&rr->caa.flags, sizeof(rr->caa.flags), state); | |
1499 | string_hash_func(rr->caa.tag, state); | |
1500 | siphash24_compress(rr->caa.value, rr->caa.value_size, state); | |
48d45d2b | 1501 | break; |
c9c72065 | 1502 | |
d93a16b8 | 1503 | case DNS_TYPE_OPENPGPKEY: |
c9c72065 | 1504 | default: |
a43a068a | 1505 | siphash24_compress(rr->generic.data, rr->generic.data_size, state); |
c9c72065 LP |
1506 | break; |
1507 | } | |
1508 | } | |
1509 | ||
1510 | static int dns_resource_record_compare_func(const void *a, const void *b) { | |
1511 | const DnsResourceRecord *x = a, *y = b; | |
1512 | int ret; | |
1513 | ||
1514 | ret = dns_resource_key_compare_func(x->key, y->key); | |
1515 | if (ret != 0) | |
1516 | return ret; | |
1517 | ||
1518 | if (dns_resource_record_equal(x, y)) | |
1519 | return 0; | |
1520 | ||
1f133e0d | 1521 | /* This is a bit dirty, we don't implement proper ordering, but |
c9c72065 LP |
1522 | * the hashtable doesn't need ordering anyway, hence we don't |
1523 | * care. */ | |
1524 | return x < y ? -1 : 1; | |
1525 | } | |
1526 | ||
1527 | const struct hash_ops dns_resource_record_hash_ops = { | |
1528 | .hash = dns_resource_record_hash_func, | |
1529 | .compare = dns_resource_record_compare_func, | |
1530 | }; | |
1531 | ||
17c8de63 LP |
1532 | DnsResourceRecord *dns_resource_record_copy(DnsResourceRecord *rr) { |
1533 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *copy = NULL; | |
1534 | DnsResourceRecord *t; | |
1535 | ||
1536 | assert(rr); | |
1537 | ||
1538 | copy = dns_resource_record_new(rr->key); | |
1539 | if (!copy) | |
1540 | return NULL; | |
1541 | ||
1542 | copy->ttl = rr->ttl; | |
1543 | copy->expiry = rr->expiry; | |
1544 | copy->n_skip_labels_signer = rr->n_skip_labels_signer; | |
1545 | copy->n_skip_labels_source = rr->n_skip_labels_source; | |
1546 | copy->unparseable = rr->unparseable; | |
1547 | ||
1548 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { | |
1549 | ||
1550 | case DNS_TYPE_SRV: | |
1551 | copy->srv.priority = rr->srv.priority; | |
1552 | copy->srv.weight = rr->srv.weight; | |
1553 | copy->srv.port = rr->srv.port; | |
1554 | copy->srv.name = strdup(rr->srv.name); | |
1555 | if (!copy->srv.name) | |
1556 | return NULL; | |
1557 | break; | |
1558 | ||
1559 | case DNS_TYPE_PTR: | |
1560 | case DNS_TYPE_NS: | |
1561 | case DNS_TYPE_CNAME: | |
1562 | case DNS_TYPE_DNAME: | |
1563 | copy->ptr.name = strdup(rr->ptr.name); | |
1564 | if (!copy->ptr.name) | |
1565 | return NULL; | |
1566 | break; | |
1567 | ||
1568 | case DNS_TYPE_HINFO: | |
1569 | copy->hinfo.cpu = strdup(rr->hinfo.cpu); | |
1570 | if (!copy->hinfo.cpu) | |
1571 | return NULL; | |
1572 | ||
1573 | copy->hinfo.os = strdup(rr->hinfo.os); | |
1574 | if(!copy->hinfo.os) | |
1575 | return NULL; | |
1576 | break; | |
1577 | ||
1578 | case DNS_TYPE_TXT: | |
1579 | case DNS_TYPE_SPF: | |
1580 | copy->txt.items = dns_txt_item_copy(rr->txt.items); | |
1581 | if (!copy->txt.items) | |
1582 | return NULL; | |
1583 | break; | |
1584 | ||
1585 | case DNS_TYPE_A: | |
1586 | copy->a = rr->a; | |
1587 | break; | |
1588 | ||
1589 | case DNS_TYPE_AAAA: | |
1590 | copy->aaaa = rr->aaaa; | |
1591 | break; | |
1592 | ||
1593 | case DNS_TYPE_SOA: | |
1594 | copy->soa.mname = strdup(rr->soa.mname); | |
1595 | if (!copy->soa.mname) | |
1596 | return NULL; | |
1597 | copy->soa.rname = strdup(rr->soa.rname); | |
1598 | if (!copy->soa.rname) | |
1599 | return NULL; | |
1600 | copy->soa.serial = rr->soa.serial; | |
1601 | copy->soa.refresh = rr->soa.refresh; | |
1602 | copy->soa.retry = rr->soa.retry; | |
1603 | copy->soa.expire = rr->soa.expire; | |
1604 | copy->soa.minimum = rr->soa.minimum; | |
1605 | break; | |
1606 | ||
1607 | case DNS_TYPE_MX: | |
1608 | copy->mx.priority = rr->mx.priority; | |
1609 | copy->mx.exchange = strdup(rr->mx.exchange); | |
1610 | if (!copy->mx.exchange) | |
1611 | return NULL; | |
1612 | break; | |
1613 | ||
1614 | case DNS_TYPE_LOC: | |
1615 | copy->loc = rr->loc; | |
1616 | break; | |
1617 | ||
1618 | case DNS_TYPE_SSHFP: | |
1619 | copy->sshfp.algorithm = rr->sshfp.algorithm; | |
1620 | copy->sshfp.fptype = rr->sshfp.fptype; | |
1621 | copy->sshfp.fingerprint = memdup(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); | |
1622 | if (!copy->sshfp.fingerprint) | |
1623 | return NULL; | |
1624 | copy->sshfp.fingerprint_size = rr->sshfp.fingerprint_size; | |
1625 | break; | |
1626 | ||
1627 | case DNS_TYPE_DNSKEY: | |
1628 | copy->dnskey.flags = rr->dnskey.flags; | |
1629 | copy->dnskey.protocol = rr->dnskey.protocol; | |
1630 | copy->dnskey.algorithm = rr->dnskey.algorithm; | |
1631 | copy->dnskey.key = memdup(rr->dnskey.key, rr->dnskey.key_size); | |
1632 | if (!copy->dnskey.key) | |
1633 | return NULL; | |
1634 | copy->dnskey.key_size = rr->dnskey.key_size; | |
1635 | break; | |
1636 | ||
1637 | case DNS_TYPE_RRSIG: | |
1638 | copy->rrsig.type_covered = rr->rrsig.type_covered; | |
1639 | copy->rrsig.algorithm = rr->rrsig.algorithm; | |
1640 | copy->rrsig.labels = rr->rrsig.labels; | |
1641 | copy->rrsig.original_ttl = rr->rrsig.original_ttl; | |
1642 | copy->rrsig.expiration = rr->rrsig.expiration; | |
1643 | copy->rrsig.inception = rr->rrsig.inception; | |
1644 | copy->rrsig.key_tag = rr->rrsig.key_tag; | |
1645 | copy->rrsig.signer = strdup(rr->rrsig.signer); | |
1646 | if (!copy->rrsig.signer) | |
1647 | return NULL; | |
1648 | copy->rrsig.signature = memdup(rr->rrsig.signature, rr->rrsig.signature_size); | |
1649 | if (!copy->rrsig.signature) | |
1650 | return NULL; | |
1651 | copy->rrsig.signature_size = rr->rrsig.signature_size; | |
1652 | break; | |
1653 | ||
1654 | case DNS_TYPE_NSEC: | |
1655 | copy->nsec.next_domain_name = strdup(rr->nsec.next_domain_name); | |
1656 | if (!copy->nsec.next_domain_name) | |
1657 | return NULL; | |
1658 | copy->nsec.types = bitmap_copy(rr->nsec.types); | |
1659 | if (!copy->nsec.types) | |
1660 | return NULL; | |
1661 | break; | |
1662 | ||
1663 | case DNS_TYPE_DS: | |
1664 | copy->ds.key_tag = rr->ds.key_tag; | |
1665 | copy->ds.algorithm = rr->ds.algorithm; | |
1666 | copy->ds.digest_type = rr->ds.digest_type; | |
1667 | copy->ds.digest = memdup(rr->ds.digest, rr->ds.digest_size); | |
1668 | if (!copy->ds.digest) | |
1669 | return NULL; | |
1670 | copy->ds.digest_size = rr->ds.digest_size; | |
1671 | break; | |
1672 | ||
1673 | case DNS_TYPE_NSEC3: | |
1674 | copy->nsec3.algorithm = rr->nsec3.algorithm; | |
1675 | copy->nsec3.flags = rr->nsec3.flags; | |
1676 | copy->nsec3.iterations = rr->nsec3.iterations; | |
1677 | copy->nsec3.salt = memdup(rr->nsec3.salt, rr->nsec3.salt_size); | |
1678 | if (!copy->nsec3.salt) | |
1679 | return NULL; | |
1680 | copy->nsec3.salt_size = rr->nsec3.salt_size; | |
1681 | copy->nsec3.next_hashed_name = memdup(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size); | |
1682 | if (!copy->nsec3.next_hashed_name_size) | |
1683 | return NULL; | |
1684 | copy->nsec3.next_hashed_name_size = rr->nsec3.next_hashed_name_size; | |
1685 | copy->nsec3.types = bitmap_copy(rr->nsec3.types); | |
1686 | if (!copy->nsec3.types) | |
1687 | return NULL; | |
1688 | break; | |
1689 | ||
1690 | case DNS_TYPE_TLSA: | |
1691 | copy->tlsa.cert_usage = rr->tlsa.cert_usage; | |
1692 | copy->tlsa.selector = rr->tlsa.selector; | |
1693 | copy->tlsa.matching_type = rr->tlsa.matching_type; | |
1694 | copy->tlsa.data = memdup(rr->tlsa.data, rr->tlsa.data_size); | |
1695 | if (!copy->tlsa.data) | |
1696 | return NULL; | |
1697 | copy->tlsa.data_size = rr->tlsa.data_size; | |
1698 | break; | |
1699 | ||
1700 | case DNS_TYPE_CAA: | |
1701 | copy->caa.flags = rr->caa.flags; | |
1702 | copy->caa.tag = strdup(rr->caa.tag); | |
1703 | if (!copy->caa.tag) | |
1704 | return NULL; | |
1705 | copy->caa.value = memdup(rr->caa.value, rr->caa.value_size); | |
1706 | if (!copy->caa.value) | |
1707 | return NULL; | |
1708 | copy->caa.value_size = rr->caa.value_size; | |
1709 | break; | |
1710 | ||
1711 | case DNS_TYPE_OPT: | |
1712 | default: | |
1713 | copy->generic.data = memdup(rr->generic.data, rr->generic.data_size); | |
1714 | if (!copy->generic.data) | |
1715 | return NULL; | |
1716 | copy->generic.data_size = rr->generic.data_size; | |
1717 | break; | |
1718 | } | |
1719 | ||
1720 | t = copy; | |
1721 | copy = NULL; | |
1722 | ||
1723 | return t; | |
1724 | } | |
1725 | ||
1726 | int dns_resource_record_clamp_ttl(DnsResourceRecord **rr, uint32_t max_ttl) { | |
1727 | DnsResourceRecord *old_rr, *new_rr; | |
1728 | uint32_t new_ttl; | |
1729 | ||
1730 | assert(rr); | |
1731 | old_rr = *rr; | |
1732 | ||
1733 | if (old_rr->key->type == DNS_TYPE_OPT) | |
1734 | return -EINVAL; | |
1735 | ||
1736 | new_ttl = MIN(old_rr->ttl, max_ttl); | |
1737 | if (new_ttl == old_rr->ttl) | |
1738 | return 0; | |
1739 | ||
1740 | if (old_rr->n_ref == 1) { | |
1741 | /* Patch in place */ | |
1742 | old_rr->ttl = new_ttl; | |
1743 | return 1; | |
1744 | } | |
1745 | ||
1746 | new_rr = dns_resource_record_copy(old_rr); | |
1747 | if (!new_rr) | |
1748 | return -ENOMEM; | |
1749 | ||
1750 | new_rr->ttl = new_ttl; | |
1751 | ||
1752 | dns_resource_record_unref(*rr); | |
1753 | *rr = new_rr; | |
1754 | ||
1755 | return 1; | |
1756 | } | |
1757 | ||
2001c805 LP |
1758 | DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i) { |
1759 | DnsTxtItem *n; | |
1760 | ||
1761 | if (!i) | |
1762 | return NULL; | |
1763 | ||
1764 | n = i->items_next; | |
1765 | ||
1766 | free(i); | |
1767 | return dns_txt_item_free_all(n); | |
1768 | } | |
1769 | ||
1770 | bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) { | |
1771 | ||
4d247a6c LP |
1772 | if (a == b) |
1773 | return true; | |
1774 | ||
2001c805 LP |
1775 | if (!a != !b) |
1776 | return false; | |
1777 | ||
1778 | if (!a) | |
1779 | return true; | |
1780 | ||
1781 | if (a->length != b->length) | |
1782 | return false; | |
1783 | ||
1784 | if (memcmp(a->data, b->data, a->length) != 0) | |
1785 | return false; | |
1786 | ||
1787 | return dns_txt_item_equal(a->items_next, b->items_next); | |
1788 | } | |
8730bccf | 1789 | |
17c8de63 LP |
1790 | DnsTxtItem *dns_txt_item_copy(DnsTxtItem *first) { |
1791 | DnsTxtItem *i, *copy = NULL, *end = NULL; | |
1792 | ||
1793 | LIST_FOREACH(items, i, first) { | |
1794 | DnsTxtItem *j; | |
1795 | ||
1796 | j = memdup(i, offsetof(DnsTxtItem, data) + i->length + 1); | |
1797 | if (!j) { | |
1798 | dns_txt_item_free_all(copy); | |
1799 | return NULL; | |
1800 | } | |
1801 | ||
1802 | LIST_INSERT_AFTER(items, copy, end, j); | |
1803 | end = j; | |
1804 | } | |
1805 | ||
1806 | return copy; | |
1807 | } | |
1808 | ||
8730bccf | 1809 | static const char* const dnssec_algorithm_table[_DNSSEC_ALGORITHM_MAX_DEFINED] = { |
6f717d08 | 1810 | /* Mnemonics as listed on https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */ |
8730bccf LP |
1811 | [DNSSEC_ALGORITHM_RSAMD5] = "RSAMD5", |
1812 | [DNSSEC_ALGORITHM_DH] = "DH", | |
1813 | [DNSSEC_ALGORITHM_DSA] = "DSA", | |
1814 | [DNSSEC_ALGORITHM_ECC] = "ECC", | |
1815 | [DNSSEC_ALGORITHM_RSASHA1] = "RSASHA1", | |
1816 | [DNSSEC_ALGORITHM_DSA_NSEC3_SHA1] = "DSA-NSEC3-SHA1", | |
1817 | [DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1] = "RSASHA1-NSEC3-SHA1", | |
1818 | [DNSSEC_ALGORITHM_RSASHA256] = "RSASHA256", | |
1819 | [DNSSEC_ALGORITHM_RSASHA512] = "RSASHA512", | |
6f717d08 LP |
1820 | [DNSSEC_ALGORITHM_ECC_GOST] = "ECC-GOST", |
1821 | [DNSSEC_ALGORITHM_ECDSAP256SHA256] = "ECDSAP256SHA256", | |
1822 | [DNSSEC_ALGORITHM_ECDSAP384SHA384] = "ECDSAP384SHA384", | |
8730bccf LP |
1823 | [DNSSEC_ALGORITHM_INDIRECT] = "INDIRECT", |
1824 | [DNSSEC_ALGORITHM_PRIVATEDNS] = "PRIVATEDNS", | |
1825 | [DNSSEC_ALGORITHM_PRIVATEOID] = "PRIVATEOID", | |
1826 | }; | |
8e54f5d9 | 1827 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_algorithm, int, 255); |
8730bccf LP |
1828 | |
1829 | static const char* const dnssec_digest_table[_DNSSEC_DIGEST_MAX_DEFINED] = { | |
6f717d08 LP |
1830 | /* Names as listed on https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml */ |
1831 | [DNSSEC_DIGEST_SHA1] = "SHA-1", | |
1832 | [DNSSEC_DIGEST_SHA256] = "SHA-256", | |
1833 | [DNSSEC_DIGEST_GOST_R_34_11_94] = "GOST_R_34.11-94", | |
1834 | [DNSSEC_DIGEST_SHA384] = "SHA-384", | |
8730bccf | 1835 | }; |
8e54f5d9 | 1836 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_digest, int, 255); |