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1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ | |
2 | ||
3 | #include <math.h> | |
4 | ||
5 | #include "alloc-util.h" | |
6 | #include "dns-domain.h" | |
7 | #include "dns-type.h" | |
8 | #include "escape.h" | |
9 | #include "hexdecoct.h" | |
10 | #include "memory-util.h" | |
11 | #include "resolved-dns-dnssec.h" | |
12 | #include "resolved-dns-packet.h" | |
13 | #include "resolved-dns-rr.h" | |
14 | #include "string-table.h" | |
15 | #include "string-util.h" | |
16 | #include "strv.h" | |
17 | #include "terminal-util.h" | |
18 | #include "unaligned.h" | |
19 | ||
20 | DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) { | |
21 | DnsResourceKey *k; | |
22 | size_t l; | |
23 | ||
24 | assert(name); | |
25 | ||
26 | l = strlen(name); | |
27 | k = malloc0(sizeof(DnsResourceKey) + l + 1); | |
28 | if (!k) | |
29 | return NULL; | |
30 | ||
31 | k->n_ref = 1; | |
32 | k->class = class; | |
33 | k->type = type; | |
34 | ||
35 | strcpy((char*) k + sizeof(DnsResourceKey), name); | |
36 | ||
37 | return k; | |
38 | } | |
39 | ||
40 | DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname) { | |
41 | int r; | |
42 | ||
43 | assert(key); | |
44 | assert(cname); | |
45 | ||
46 | assert(IN_SET(cname->key->type, DNS_TYPE_CNAME, DNS_TYPE_DNAME)); | |
47 | ||
48 | if (cname->key->type == DNS_TYPE_CNAME) | |
49 | return dns_resource_key_new(key->class, key->type, cname->cname.name); | |
50 | else { | |
51 | _cleanup_free_ char *destination = NULL; | |
52 | DnsResourceKey *k; | |
53 | ||
54 | r = dns_name_change_suffix(dns_resource_key_name(key), dns_resource_key_name(cname->key), cname->dname.name, &destination); | |
55 | if (r < 0) | |
56 | return NULL; | |
57 | if (r == 0) | |
58 | return dns_resource_key_ref((DnsResourceKey*) key); | |
59 | ||
60 | k = dns_resource_key_new_consume(key->class, key->type, destination); | |
61 | if (!k) | |
62 | return NULL; | |
63 | ||
64 | TAKE_PTR(destination); | |
65 | return k; | |
66 | } | |
67 | } | |
68 | ||
69 | int dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name) { | |
70 | DnsResourceKey *new_key; | |
71 | char *joined; | |
72 | int r; | |
73 | ||
74 | assert(ret); | |
75 | assert(key); | |
76 | assert(name); | |
77 | ||
78 | if (dns_name_is_root(name)) { | |
79 | *ret = dns_resource_key_ref(key); | |
80 | return 0; | |
81 | } | |
82 | ||
83 | r = dns_name_concat(dns_resource_key_name(key), name, 0, &joined); | |
84 | if (r < 0) | |
85 | return r; | |
86 | ||
87 | new_key = dns_resource_key_new_consume(key->class, key->type, joined); | |
88 | if (!new_key) { | |
89 | free(joined); | |
90 | return -ENOMEM; | |
91 | } | |
92 | ||
93 | *ret = new_key; | |
94 | return 0; | |
95 | } | |
96 | ||
97 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) { | |
98 | DnsResourceKey *k; | |
99 | ||
100 | assert(name); | |
101 | ||
102 | k = new(DnsResourceKey, 1); | |
103 | if (!k) | |
104 | return NULL; | |
105 | ||
106 | *k = (DnsResourceKey) { | |
107 | .n_ref = 1, | |
108 | .class = class, | |
109 | .type = type, | |
110 | ._name = name, | |
111 | }; | |
112 | ||
113 | return k; | |
114 | } | |
115 | ||
116 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) { | |
117 | ||
118 | if (!k) | |
119 | return NULL; | |
120 | ||
121 | /* Static/const keys created with DNS_RESOURCE_KEY_CONST will | |
122 | * set this to -1, they should not be reffed/unreffed */ | |
123 | assert(k->n_ref != UINT_MAX); | |
124 | ||
125 | assert(k->n_ref > 0); | |
126 | k->n_ref++; | |
127 | ||
128 | return k; | |
129 | } | |
130 | ||
131 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) { | |
132 | if (!k) | |
133 | return NULL; | |
134 | ||
135 | assert(k->n_ref != UINT_MAX); | |
136 | assert(k->n_ref > 0); | |
137 | ||
138 | if (k->n_ref == 1) { | |
139 | free(k->_name); | |
140 | free(k); | |
141 | } else | |
142 | k->n_ref--; | |
143 | ||
144 | return NULL; | |
145 | } | |
146 | ||
147 | const char* dns_resource_key_name(const DnsResourceKey *key) { | |
148 | const char *name; | |
149 | ||
150 | if (!key) | |
151 | return NULL; | |
152 | ||
153 | if (key->_name) | |
154 | name = key->_name; | |
155 | else | |
156 | name = (char*) key + sizeof(DnsResourceKey); | |
157 | ||
158 | if (dns_name_is_root(name)) | |
159 | return "."; | |
160 | else | |
161 | return name; | |
162 | } | |
163 | ||
164 | bool dns_resource_key_is_address(const DnsResourceKey *key) { | |
165 | assert(key); | |
166 | ||
167 | /* Check if this is an A or AAAA resource key */ | |
168 | ||
169 | return key->class == DNS_CLASS_IN && IN_SET(key->type, DNS_TYPE_A, DNS_TYPE_AAAA); | |
170 | } | |
171 | ||
172 | bool dns_resource_key_is_dnssd_ptr(const DnsResourceKey *key) { | |
173 | assert(key); | |
174 | ||
175 | /* Check if this is a PTR resource key used in | |
176 | Service Instance Enumeration as described in RFC6763 p4.1. */ | |
177 | ||
178 | if (key->type != DNS_TYPE_PTR) | |
179 | return false; | |
180 | ||
181 | return dns_name_endswith(dns_resource_key_name(key), "_tcp.local") || | |
182 | dns_name_endswith(dns_resource_key_name(key), "_udp.local"); | |
183 | } | |
184 | ||
185 | bool dns_resource_key_is_dnssd_two_label_ptr(const DnsResourceKey *key) { | |
186 | assert(key); | |
187 | ||
188 | /* Check if this is a PTR resource key used in Service Instance | |
189 | * Enumeration as described in RFC6763 § 4.1, excluding selective | |
190 | * service names described in RFC6763 § 7.1. */ | |
191 | ||
192 | if (key->type != DNS_TYPE_PTR) | |
193 | return false; | |
194 | ||
195 | const char *name = dns_resource_key_name(key); | |
196 | if (dns_name_parent(&name) <= 0) | |
197 | return false; | |
198 | ||
199 | return dns_name_equal(name, "_tcp.local") > 0 || dns_name_equal(name, "_udp.local") > 0; | |
200 | } | |
201 | ||
202 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) { | |
203 | int r; | |
204 | ||
205 | if (a == b) | |
206 | return 1; | |
207 | ||
208 | r = dns_name_equal(dns_resource_key_name(a), dns_resource_key_name(b)); | |
209 | if (r <= 0) | |
210 | return r; | |
211 | ||
212 | if (a->class != b->class) | |
213 | return 0; | |
214 | ||
215 | if (a->type != b->type) | |
216 | return 0; | |
217 | ||
218 | return 1; | |
219 | } | |
220 | ||
221 | int dns_resource_key_match_rr(const DnsResourceKey *key, DnsResourceRecord *rr, const char *search_domain) { | |
222 | int r; | |
223 | ||
224 | assert(key); | |
225 | assert(rr); | |
226 | ||
227 | if (key == rr->key) | |
228 | return 1; | |
229 | ||
230 | /* Checks if an rr matches the specified key. If a search | |
231 | * domain is specified, it will also be checked if the key | |
232 | * with the search domain suffixed might match the RR. */ | |
233 | ||
234 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) | |
235 | return 0; | |
236 | ||
237 | if (rr->key->type != key->type && key->type != DNS_TYPE_ANY) | |
238 | return 0; | |
239 | ||
240 | r = dns_name_equal(dns_resource_key_name(rr->key), dns_resource_key_name(key)); | |
241 | if (r != 0) | |
242 | return r; | |
243 | ||
244 | if (search_domain) { | |
245 | _cleanup_free_ char *joined = NULL; | |
246 | ||
247 | r = dns_name_concat(dns_resource_key_name(key), search_domain, 0, &joined); | |
248 | if (r < 0) | |
249 | return r; | |
250 | ||
251 | return dns_name_equal(dns_resource_key_name(rr->key), joined); | |
252 | } | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
257 | int dns_resource_key_match_cname_or_dname(const DnsResourceKey *key, const DnsResourceKey *cname, const char *search_domain) { | |
258 | int r; | |
259 | ||
260 | assert(key); | |
261 | assert(cname); | |
262 | ||
263 | if (cname->class != key->class && key->class != DNS_CLASS_ANY) | |
264 | return 0; | |
265 | ||
266 | if (!dns_type_may_redirect(key->type)) | |
267 | return 0; | |
268 | ||
269 | if (cname->type == DNS_TYPE_CNAME) | |
270 | r = dns_name_equal(dns_resource_key_name(key), dns_resource_key_name(cname)); | |
271 | else if (cname->type == DNS_TYPE_DNAME) | |
272 | r = dns_name_endswith(dns_resource_key_name(key), dns_resource_key_name(cname)); | |
273 | else | |
274 | return 0; | |
275 | ||
276 | if (r != 0) | |
277 | return r; | |
278 | ||
279 | if (search_domain) { | |
280 | _cleanup_free_ char *joined = NULL; | |
281 | ||
282 | r = dns_name_concat(dns_resource_key_name(key), search_domain, 0, &joined); | |
283 | if (r < 0) | |
284 | return r; | |
285 | ||
286 | if (cname->type == DNS_TYPE_CNAME) | |
287 | return dns_name_equal(joined, dns_resource_key_name(cname)); | |
288 | else if (cname->type == DNS_TYPE_DNAME) | |
289 | return dns_name_endswith(joined, dns_resource_key_name(cname)); | |
290 | } | |
291 | ||
292 | return 0; | |
293 | } | |
294 | ||
295 | int dns_resource_key_match_soa(const DnsResourceKey *key, const DnsResourceKey *soa) { | |
296 | assert(soa); | |
297 | assert(key); | |
298 | ||
299 | /* Checks whether 'soa' is a SOA record for the specified key. */ | |
300 | ||
301 | if (soa->class != key->class) | |
302 | return 0; | |
303 | ||
304 | if (soa->type != DNS_TYPE_SOA) | |
305 | return 0; | |
306 | ||
307 | return dns_name_endswith(dns_resource_key_name(key), dns_resource_key_name(soa)); | |
308 | } | |
309 | ||
310 | static void dns_resource_key_hash_func(const DnsResourceKey *k, struct siphash *state) { | |
311 | assert(k); | |
312 | ||
313 | dns_name_hash_func(dns_resource_key_name(k), state); | |
314 | siphash24_compress_typesafe(k->class, state); | |
315 | siphash24_compress_typesafe(k->type, state); | |
316 | } | |
317 | ||
318 | static int dns_resource_key_compare_func(const DnsResourceKey *x, const DnsResourceKey *y) { | |
319 | int r; | |
320 | ||
321 | r = dns_name_compare_func(dns_resource_key_name(x), dns_resource_key_name(y)); | |
322 | if (r != 0) | |
323 | return r; | |
324 | ||
325 | r = CMP(x->type, y->type); | |
326 | if (r != 0) | |
327 | return r; | |
328 | ||
329 | return CMP(x->class, y->class); | |
330 | } | |
331 | ||
332 | DEFINE_HASH_OPS(dns_resource_key_hash_ops, DnsResourceKey, dns_resource_key_hash_func, dns_resource_key_compare_func); | |
333 | ||
334 | char* dns_resource_key_to_string(const DnsResourceKey *key, char *buf, size_t buf_size) { | |
335 | const char *c, *t; | |
336 | char *ans = buf; | |
337 | ||
338 | /* If we cannot convert the CLASS/TYPE into a known string, | |
339 | use the format recommended by RFC 3597, Section 5. */ | |
340 | ||
341 | c = dns_class_to_string(key->class); | |
342 | t = dns_type_to_string(key->type); | |
343 | ||
344 | (void) snprintf(buf, buf_size, "%s %s%s%.0u %s%s%.0u", | |
345 | dns_resource_key_name(key), | |
346 | strempty(c), c ? "" : "CLASS", c ? 0u : key->class, | |
347 | strempty(t), t ? "" : "TYPE", t ? 0u : key->type); | |
348 | ||
349 | return ans; | |
350 | } | |
351 | ||
352 | bool dns_resource_key_reduce(DnsResourceKey **a, DnsResourceKey **b) { | |
353 | assert(a); | |
354 | assert(b); | |
355 | ||
356 | /* Try to replace one RR key by another if they are identical, thus saving a bit of memory. Note that we do | |
357 | * this only for RR keys, not for RRs themselves, as they carry a lot of additional metadata (where they come | |
358 | * from, validity data, and suchlike), and cannot be replaced so easily by other RRs that have the same | |
359 | * superficial data. */ | |
360 | ||
361 | if (!*a) | |
362 | return false; | |
363 | if (!*b) | |
364 | return false; | |
365 | ||
366 | /* We refuse merging const keys */ | |
367 | if ((*a)->n_ref == UINT_MAX) | |
368 | return false; | |
369 | if ((*b)->n_ref == UINT_MAX) | |
370 | return false; | |
371 | ||
372 | /* Already the same? */ | |
373 | if (*a == *b) | |
374 | return true; | |
375 | ||
376 | /* Are they really identical? */ | |
377 | if (dns_resource_key_equal(*a, *b) <= 0) | |
378 | return false; | |
379 | ||
380 | /* Keep the one which already has more references. */ | |
381 | if ((*a)->n_ref > (*b)->n_ref) | |
382 | DNS_RESOURCE_KEY_REPLACE(*b, dns_resource_key_ref(*a)); | |
383 | else | |
384 | DNS_RESOURCE_KEY_REPLACE(*a, dns_resource_key_ref(*b)); | |
385 | ||
386 | return true; | |
387 | } | |
388 | ||
389 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { | |
390 | DnsResourceRecord *rr; | |
391 | ||
392 | rr = new(DnsResourceRecord, 1); | |
393 | if (!rr) | |
394 | return NULL; | |
395 | ||
396 | *rr = (DnsResourceRecord) { | |
397 | .n_ref = 1, | |
398 | .key = dns_resource_key_ref(key), | |
399 | .expiry = USEC_INFINITY, | |
400 | .n_skip_labels_signer = UINT8_MAX, | |
401 | .n_skip_labels_source = UINT8_MAX, | |
402 | }; | |
403 | ||
404 | return rr; | |
405 | } | |
406 | ||
407 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) { | |
408 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
409 | ||
410 | key = dns_resource_key_new(class, type, name); | |
411 | if (!key) | |
412 | return NULL; | |
413 | ||
414 | return dns_resource_record_new(key); | |
415 | } | |
416 | ||
417 | static DnsResourceRecord* dns_resource_record_free(DnsResourceRecord *rr) { | |
418 | assert(rr); | |
419 | ||
420 | if (rr->key) { | |
421 | switch (rr->key->type) { | |
422 | ||
423 | case DNS_TYPE_SRV: | |
424 | free(rr->srv.name); | |
425 | break; | |
426 | ||
427 | case DNS_TYPE_PTR: | |
428 | case DNS_TYPE_NS: | |
429 | case DNS_TYPE_CNAME: | |
430 | case DNS_TYPE_DNAME: | |
431 | free(rr->ptr.name); | |
432 | break; | |
433 | ||
434 | case DNS_TYPE_HINFO: | |
435 | free(rr->hinfo.cpu); | |
436 | free(rr->hinfo.os); | |
437 | break; | |
438 | ||
439 | case DNS_TYPE_TXT: | |
440 | case DNS_TYPE_SPF: | |
441 | dns_txt_item_free_all(rr->txt.items); | |
442 | break; | |
443 | ||
444 | case DNS_TYPE_SOA: | |
445 | free(rr->soa.mname); | |
446 | free(rr->soa.rname); | |
447 | break; | |
448 | ||
449 | case DNS_TYPE_MX: | |
450 | free(rr->mx.exchange); | |
451 | break; | |
452 | ||
453 | case DNS_TYPE_DS: | |
454 | free(rr->ds.digest); | |
455 | break; | |
456 | ||
457 | case DNS_TYPE_SSHFP: | |
458 | free(rr->sshfp.fingerprint); | |
459 | break; | |
460 | ||
461 | case DNS_TYPE_DNSKEY: | |
462 | free(rr->dnskey.key); | |
463 | break; | |
464 | ||
465 | case DNS_TYPE_RRSIG: | |
466 | free(rr->rrsig.signer); | |
467 | free(rr->rrsig.signature); | |
468 | break; | |
469 | ||
470 | case DNS_TYPE_NSEC: | |
471 | free(rr->nsec.next_domain_name); | |
472 | bitmap_free(rr->nsec.types); | |
473 | break; | |
474 | ||
475 | case DNS_TYPE_NSEC3: | |
476 | free(rr->nsec3.next_hashed_name); | |
477 | free(rr->nsec3.salt); | |
478 | bitmap_free(rr->nsec3.types); | |
479 | break; | |
480 | ||
481 | case DNS_TYPE_LOC: | |
482 | case DNS_TYPE_A: | |
483 | case DNS_TYPE_AAAA: | |
484 | break; | |
485 | ||
486 | case DNS_TYPE_TLSA: | |
487 | free(rr->tlsa.data); | |
488 | break; | |
489 | ||
490 | case DNS_TYPE_SVCB: | |
491 | case DNS_TYPE_HTTPS: | |
492 | free(rr->svcb.target_name); | |
493 | dns_svc_param_free_all(rr->svcb.params); | |
494 | break; | |
495 | ||
496 | case DNS_TYPE_CAA: | |
497 | free(rr->caa.tag); | |
498 | free(rr->caa.value); | |
499 | break; | |
500 | ||
501 | case DNS_TYPE_NAPTR: | |
502 | free(rr->naptr.flags); | |
503 | free(rr->naptr.services); | |
504 | free(rr->naptr.regexp); | |
505 | free(rr->naptr.replacement); | |
506 | break; | |
507 | ||
508 | case DNS_TYPE_OPENPGPKEY: | |
509 | default: | |
510 | if (!rr->unparsable) | |
511 | free(rr->generic.data); | |
512 | } | |
513 | ||
514 | if (rr->unparsable) | |
515 | free(rr->generic.data); | |
516 | ||
517 | free(rr->wire_format); | |
518 | dns_resource_key_unref(rr->key); | |
519 | } | |
520 | ||
521 | free(rr->to_string); | |
522 | return mfree(rr); | |
523 | } | |
524 | ||
525 | DEFINE_TRIVIAL_REF_UNREF_FUNC(DnsResourceRecord, dns_resource_record, dns_resource_record_free); | |
526 | ||
527 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) { | |
528 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
529 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; | |
530 | _cleanup_free_ char *ptr = NULL; | |
531 | int r; | |
532 | ||
533 | assert(ret); | |
534 | assert(address); | |
535 | assert(hostname); | |
536 | ||
537 | r = dns_name_reverse(family, address, &ptr); | |
538 | if (r < 0) | |
539 | return r; | |
540 | ||
541 | key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr); | |
542 | if (!key) | |
543 | return -ENOMEM; | |
544 | ||
545 | ptr = NULL; | |
546 | ||
547 | rr = dns_resource_record_new(key); | |
548 | if (!rr) | |
549 | return -ENOMEM; | |
550 | ||
551 | rr->ptr.name = strdup(hostname); | |
552 | if (!rr->ptr.name) | |
553 | return -ENOMEM; | |
554 | ||
555 | *ret = TAKE_PTR(rr); | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
560 | int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name) { | |
561 | DnsResourceRecord *rr; | |
562 | ||
563 | assert(ret); | |
564 | assert(address); | |
565 | assert(family); | |
566 | ||
567 | if (family == AF_INET) { | |
568 | ||
569 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, name); | |
570 | if (!rr) | |
571 | return -ENOMEM; | |
572 | ||
573 | rr->a.in_addr = address->in; | |
574 | ||
575 | } else if (family == AF_INET6) { | |
576 | ||
577 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, name); | |
578 | if (!rr) | |
579 | return -ENOMEM; | |
580 | ||
581 | rr->aaaa.in6_addr = address->in6; | |
582 | } else | |
583 | return -EAFNOSUPPORT; | |
584 | ||
585 | *ret = rr; | |
586 | ||
587 | return 0; | |
588 | } | |
589 | ||
590 | #define FIELD_EQUAL(a, b, field) \ | |
591 | ((a).field ## _size == (b).field ## _size && \ | |
592 | memcmp_safe((a).field, (b).field, (a).field ## _size) == 0) | |
593 | ||
594 | int dns_resource_record_payload_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { | |
595 | int r; | |
596 | ||
597 | /* Check if a and b are the same, but don't look at their keys */ | |
598 | ||
599 | if (a->unparsable != b->unparsable) | |
600 | return 0; | |
601 | ||
602 | switch (a->unparsable ? _DNS_TYPE_INVALID : a->key->type) { | |
603 | ||
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 | ||
613 | case DNS_TYPE_PTR: | |
614 | case DNS_TYPE_NS: | |
615 | case DNS_TYPE_CNAME: | |
616 | case DNS_TYPE_DNAME: | |
617 | return dns_name_equal(a->ptr.name, b->ptr.name); | |
618 | ||
619 | case DNS_TYPE_HINFO: | |
620 | return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && | |
621 | strcaseeq(a->hinfo.os, b->hinfo.os); | |
622 | ||
623 | case DNS_TYPE_SPF: /* exactly the same as TXT */ | |
624 | case DNS_TYPE_TXT: | |
625 | return dns_txt_item_equal(a->txt.items, b->txt.items); | |
626 | ||
627 | case DNS_TYPE_A: | |
628 | return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; | |
629 | ||
630 | case DNS_TYPE_AAAA: | |
631 | return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; | |
632 | ||
633 | case DNS_TYPE_SOA: | |
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; | |
646 | ||
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 | ||
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 | ||
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 && | |
667 | FIELD_EQUAL(a->ds, b->ds, digest); | |
668 | ||
669 | case DNS_TYPE_SSHFP: | |
670 | return a->sshfp.algorithm == b->sshfp.algorithm && | |
671 | a->sshfp.fptype == b->sshfp.fptype && | |
672 | FIELD_EQUAL(a->sshfp, b->sshfp, fingerprint); | |
673 | ||
674 | case DNS_TYPE_DNSKEY: | |
675 | return a->dnskey.flags == b->dnskey.flags && | |
676 | a->dnskey.protocol == b->dnskey.protocol && | |
677 | a->dnskey.algorithm == b->dnskey.algorithm && | |
678 | FIELD_EQUAL(a->dnskey, b->dnskey, key); | |
679 | ||
680 | case DNS_TYPE_RRSIG: | |
681 | /* do the fast comparisons first */ | |
682 | if (!(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 | return false; | |
691 | ||
692 | return dns_name_equal(a->rrsig.signer, b->rrsig.signer); | |
693 | ||
694 | case DNS_TYPE_NSEC: | |
695 | r = dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name); | |
696 | if (r <= 0) | |
697 | return r; | |
698 | ||
699 | return bitmap_equal(a->nsec.types, b->nsec.types); | |
700 | ||
701 | case DNS_TYPE_NSEC3: | |
702 | return a->nsec3.algorithm == b->nsec3.algorithm && | |
703 | a->nsec3.flags == b->nsec3.flags && | |
704 | a->nsec3.iterations == b->nsec3.iterations && | |
705 | FIELD_EQUAL(a->nsec3, b->nsec3, salt) && | |
706 | FIELD_EQUAL(a->nsec3, b->nsec3, next_hashed_name) && | |
707 | bitmap_equal(a->nsec3.types, b->nsec3.types); | |
708 | ||
709 | case DNS_TYPE_TLSA: | |
710 | return a->tlsa.cert_usage == b->tlsa.cert_usage && | |
711 | a->tlsa.selector == b->tlsa.selector && | |
712 | a->tlsa.matching_type == b->tlsa.matching_type && | |
713 | FIELD_EQUAL(a->tlsa, b->tlsa, data); | |
714 | ||
715 | case DNS_TYPE_SVCB: | |
716 | case DNS_TYPE_HTTPS: | |
717 | ||
718 | if (!(a->svcb.priority == b->svcb.priority && | |
719 | dns_svc_params_equal(a->svcb.params, b->svcb.params))) | |
720 | return false; | |
721 | ||
722 | return dns_name_equal(a->svcb.target_name, b->svcb.target_name); | |
723 | ||
724 | case DNS_TYPE_CAA: | |
725 | return a->caa.flags == b->caa.flags && | |
726 | streq(a->caa.tag, b->caa.tag) && | |
727 | FIELD_EQUAL(a->caa, b->caa, value); | |
728 | ||
729 | case DNS_TYPE_NAPTR: | |
730 | r = dns_name_equal(a->naptr.replacement, b->naptr.replacement); | |
731 | if (r <= 0) | |
732 | return r; | |
733 | ||
734 | return a->naptr.order == b->naptr.order && | |
735 | a->naptr.preference == b->naptr.preference && | |
736 | streq(a->naptr.flags, b->naptr.flags) && | |
737 | streq(a->naptr.services, b->naptr.services) && | |
738 | streq(a->naptr.regexp, b->naptr.regexp); | |
739 | ||
740 | case DNS_TYPE_OPENPGPKEY: | |
741 | default: | |
742 | return FIELD_EQUAL(a->generic, b->generic, data); | |
743 | } | |
744 | } | |
745 | ||
746 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { | |
747 | int r; | |
748 | ||
749 | assert(a); | |
750 | assert(b); | |
751 | ||
752 | if (a == b) | |
753 | return 1; | |
754 | ||
755 | r = dns_resource_key_equal(a->key, b->key); | |
756 | if (r <= 0) | |
757 | return r; | |
758 | ||
759 | return dns_resource_record_payload_equal(a, b); | |
760 | } | |
761 | ||
762 | static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude, | |
763 | uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) { | |
764 | char *s; | |
765 | char NS = latitude >= 1U<<31 ? 'N' : 'S'; | |
766 | char EW = longitude >= 1U<<31 ? 'E' : 'W'; | |
767 | ||
768 | int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude); | |
769 | int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude); | |
770 | double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude); | |
771 | double siz = (size >> 4) * exp10((double) (size & 0xF)); | |
772 | double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF)); | |
773 | double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF)); | |
774 | ||
775 | if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm", | |
776 | (lat / 60000 / 60), | |
777 | (lat / 60000) % 60, | |
778 | (lat % 60000) / 1000., | |
779 | NS, | |
780 | (lon / 60000 / 60), | |
781 | (lon / 60000) % 60, | |
782 | (lon % 60000) / 1000., | |
783 | EW, | |
784 | alt / 100., | |
785 | siz / 100., | |
786 | hor / 100., | |
787 | ver / 100.) < 0) | |
788 | return NULL; | |
789 | ||
790 | return s; | |
791 | } | |
792 | ||
793 | static int format_timestamp_dns(char *buf, size_t l, time_t sec) { | |
794 | struct tm tm; | |
795 | ||
796 | assert(buf); | |
797 | assert(l > STRLEN("YYYYMMDDHHmmSS")); | |
798 | ||
799 | if (!gmtime_r(&sec, &tm)) | |
800 | return -EINVAL; | |
801 | ||
802 | if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0) | |
803 | return -EINVAL; | |
804 | ||
805 | return 0; | |
806 | } | |
807 | ||
808 | static char *format_types(Bitmap *types) { | |
809 | _cleanup_strv_free_ char **strv = NULL; | |
810 | _cleanup_free_ char *str = NULL; | |
811 | unsigned type; | |
812 | int r; | |
813 | ||
814 | BITMAP_FOREACH(type, types) { | |
815 | if (dns_type_to_string(type)) { | |
816 | r = strv_extend(&strv, dns_type_to_string(type)); | |
817 | if (r < 0) | |
818 | return NULL; | |
819 | } else { | |
820 | char *t; | |
821 | ||
822 | r = asprintf(&t, "TYPE%u", type); | |
823 | if (r < 0) | |
824 | return NULL; | |
825 | ||
826 | r = strv_consume(&strv, t); | |
827 | if (r < 0) | |
828 | return NULL; | |
829 | } | |
830 | } | |
831 | ||
832 | str = strv_join(strv, " "); | |
833 | if (!str) | |
834 | return NULL; | |
835 | ||
836 | return strjoin("( ", str, " )"); | |
837 | } | |
838 | ||
839 | static char *format_txt(DnsTxtItem *first) { | |
840 | size_t c = 1; | |
841 | char *p, *s; | |
842 | ||
843 | LIST_FOREACH(items, i, first) | |
844 | c += i->length * 4 + 3; | |
845 | ||
846 | p = s = new(char, c); | |
847 | if (!s) | |
848 | return NULL; | |
849 | ||
850 | LIST_FOREACH(items, i, first) { | |
851 | if (i != first) | |
852 | *(p++) = ' '; | |
853 | ||
854 | *(p++) = '"'; | |
855 | ||
856 | for (size_t j = 0; j < i->length; j++) { | |
857 | if (i->data[j] < ' ' || i->data[j] == '"' || i->data[j] >= 127) { | |
858 | *(p++) = '\\'; | |
859 | *(p++) = '0' + (i->data[j] / 100); | |
860 | *(p++) = '0' + ((i->data[j] / 10) % 10); | |
861 | *(p++) = '0' + (i->data[j] % 10); | |
862 | } else | |
863 | *(p++) = i->data[j]; | |
864 | } | |
865 | ||
866 | *(p++) = '"'; | |
867 | } | |
868 | ||
869 | *p = 0; | |
870 | return s; | |
871 | } | |
872 | ||
873 | static char *format_svc_param_value(DnsSvcParam *i) { | |
874 | _cleanup_free_ char *value = NULL; | |
875 | ||
876 | assert(i); | |
877 | ||
878 | switch (i->key) { | |
879 | case DNS_SVC_PARAM_KEY_ALPN: { | |
880 | size_t offset = 0; | |
881 | _cleanup_strv_free_ char **values_strv = NULL; | |
882 | while (offset < i->length) { | |
883 | size_t sz = (uint8_t) i->value[offset++]; | |
884 | ||
885 | char *alpn = cescape_length((char *)&i->value[offset], sz); | |
886 | if (!alpn) | |
887 | return NULL; | |
888 | ||
889 | if (strv_push(&values_strv, alpn) < 0) | |
890 | return NULL; | |
891 | ||
892 | offset += sz; | |
893 | } | |
894 | value = strv_join(values_strv, ","); | |
895 | if (!value) | |
896 | return NULL; | |
897 | break; | |
898 | ||
899 | } | |
900 | case DNS_SVC_PARAM_KEY_PORT: { | |
901 | uint16_t port = unaligned_read_be16(i->value); | |
902 | if (asprintf(&value, "%" PRIu16, port) < 0) | |
903 | return NULL; | |
904 | return TAKE_PTR(value); | |
905 | } | |
906 | case DNS_SVC_PARAM_KEY_IPV4HINT: { | |
907 | const struct in_addr *addrs = i->value_in_addr; | |
908 | _cleanup_strv_free_ char **values_strv = NULL; | |
909 | for (size_t n = 0; n < i->length / sizeof (struct in_addr); n++) { | |
910 | char *addr; | |
911 | if (in_addr_to_string(AF_INET, (const union in_addr_union*) &addrs[n], &addr) < 0) | |
912 | return NULL; | |
913 | if (strv_push(&values_strv, addr) < 0) | |
914 | return NULL; | |
915 | } | |
916 | return strv_join(values_strv, ","); | |
917 | } | |
918 | case DNS_SVC_PARAM_KEY_IPV6HINT: { | |
919 | const struct in6_addr *addrs = i->value_in6_addr; | |
920 | _cleanup_strv_free_ char **values_strv = NULL; | |
921 | for (size_t n = 0; n < i->length / sizeof (struct in6_addr); n++) { | |
922 | char *addr; | |
923 | if (in_addr_to_string(AF_INET6, (const union in_addr_union*) &addrs[n], &addr) < 0) | |
924 | return NULL; | |
925 | if (strv_push(&values_strv, addr) < 0) | |
926 | return NULL; | |
927 | } | |
928 | return strv_join(values_strv, ","); | |
929 | } | |
930 | default: { | |
931 | value = decescape((char *)&i->value, " ,", i->length); | |
932 | if (!value) | |
933 | return NULL; | |
934 | break; | |
935 | } | |
936 | } | |
937 | ||
938 | char *qvalue; | |
939 | if (asprintf(&qvalue, "\"%s\"", value) < 0) | |
940 | return NULL; | |
941 | return qvalue; | |
942 | } | |
943 | ||
944 | static char *format_svc_param(DnsSvcParam *i) { | |
945 | const char *key = FORMAT_DNS_SVC_PARAM_KEY(i->key); | |
946 | _cleanup_free_ char *value = NULL; | |
947 | ||
948 | assert(i); | |
949 | ||
950 | if (i->length == 0) | |
951 | return strdup(key); | |
952 | ||
953 | value = format_svc_param_value(i); | |
954 | if (!value) | |
955 | return NULL; | |
956 | ||
957 | return strjoin(key, "=", value); | |
958 | } | |
959 | ||
960 | static char *format_svc_params(DnsSvcParam *first) { | |
961 | _cleanup_strv_free_ char **params = NULL; | |
962 | ||
963 | LIST_FOREACH(params, i, first) { | |
964 | char *param = format_svc_param(i); | |
965 | if (!param) | |
966 | return NULL; | |
967 | if (strv_push(¶ms, param) < 0) | |
968 | return NULL; | |
969 | } | |
970 | ||
971 | return strv_join(params, " "); | |
972 | } | |
973 | ||
974 | const char *dns_resource_record_to_string(DnsResourceRecord *rr) { | |
975 | _cleanup_free_ char *s = NULL, *t = NULL; | |
976 | char k[DNS_RESOURCE_KEY_STRING_MAX]; | |
977 | int r; | |
978 | ||
979 | assert(rr); | |
980 | ||
981 | if (rr->to_string) | |
982 | return rr->to_string; | |
983 | ||
984 | dns_resource_key_to_string(rr->key, k, sizeof(k)); | |
985 | ||
986 | switch (rr->unparsable ? _DNS_TYPE_INVALID : rr->key->type) { | |
987 | ||
988 | case DNS_TYPE_SRV: | |
989 | r = asprintf(&s, "%s %u %u %u %s", | |
990 | k, | |
991 | rr->srv.priority, | |
992 | rr->srv.weight, | |
993 | rr->srv.port, | |
994 | strna(rr->srv.name)); | |
995 | if (r < 0) | |
996 | return NULL; | |
997 | break; | |
998 | ||
999 | case DNS_TYPE_PTR: | |
1000 | case DNS_TYPE_NS: | |
1001 | case DNS_TYPE_CNAME: | |
1002 | case DNS_TYPE_DNAME: | |
1003 | s = strjoin(k, " ", rr->ptr.name); | |
1004 | if (!s) | |
1005 | return NULL; | |
1006 | ||
1007 | break; | |
1008 | ||
1009 | case DNS_TYPE_HINFO: | |
1010 | s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os); | |
1011 | if (!s) | |
1012 | return NULL; | |
1013 | break; | |
1014 | ||
1015 | case DNS_TYPE_SPF: /* exactly the same as TXT */ | |
1016 | case DNS_TYPE_TXT: | |
1017 | t = format_txt(rr->txt.items); | |
1018 | if (!t) | |
1019 | return NULL; | |
1020 | ||
1021 | s = strjoin(k, " ", t); | |
1022 | if (!s) | |
1023 | return NULL; | |
1024 | break; | |
1025 | ||
1026 | case DNS_TYPE_A: | |
1027 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &t); | |
1028 | if (r < 0) | |
1029 | return NULL; | |
1030 | ||
1031 | s = strjoin(k, " ", t); | |
1032 | if (!s) | |
1033 | return NULL; | |
1034 | break; | |
1035 | ||
1036 | case DNS_TYPE_AAAA: | |
1037 | r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); | |
1038 | if (r < 0) | |
1039 | return NULL; | |
1040 | ||
1041 | s = strjoin(k, " ", t); | |
1042 | if (!s) | |
1043 | return NULL; | |
1044 | break; | |
1045 | ||
1046 | case DNS_TYPE_SOA: | |
1047 | r = asprintf(&s, "%s %s %s %u %u %u %u %u", | |
1048 | k, | |
1049 | strna(rr->soa.mname), | |
1050 | strna(rr->soa.rname), | |
1051 | rr->soa.serial, | |
1052 | rr->soa.refresh, | |
1053 | rr->soa.retry, | |
1054 | rr->soa.expire, | |
1055 | rr->soa.minimum); | |
1056 | if (r < 0) | |
1057 | return NULL; | |
1058 | break; | |
1059 | ||
1060 | case DNS_TYPE_MX: | |
1061 | r = asprintf(&s, "%s %u %s", | |
1062 | k, | |
1063 | rr->mx.priority, | |
1064 | rr->mx.exchange); | |
1065 | if (r < 0) | |
1066 | return NULL; | |
1067 | break; | |
1068 | ||
1069 | case DNS_TYPE_LOC: | |
1070 | assert(rr->loc.version == 0); | |
1071 | ||
1072 | t = format_location(rr->loc.latitude, | |
1073 | rr->loc.longitude, | |
1074 | rr->loc.altitude, | |
1075 | rr->loc.size, | |
1076 | rr->loc.horiz_pre, | |
1077 | rr->loc.vert_pre); | |
1078 | if (!t) | |
1079 | return NULL; | |
1080 | ||
1081 | s = strjoin(k, " ", t); | |
1082 | if (!s) | |
1083 | return NULL; | |
1084 | break; | |
1085 | ||
1086 | case DNS_TYPE_DS: | |
1087 | t = hexmem(rr->ds.digest, rr->ds.digest_size); | |
1088 | if (!t) | |
1089 | return NULL; | |
1090 | ||
1091 | r = asprintf(&s, "%s %u %u %u %s", | |
1092 | k, | |
1093 | rr->ds.key_tag, | |
1094 | rr->ds.algorithm, | |
1095 | rr->ds.digest_type, | |
1096 | t); | |
1097 | if (r < 0) | |
1098 | return NULL; | |
1099 | break; | |
1100 | ||
1101 | case DNS_TYPE_SSHFP: | |
1102 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); | |
1103 | if (!t) | |
1104 | return NULL; | |
1105 | ||
1106 | r = asprintf(&s, "%s %u %u %s", | |
1107 | k, | |
1108 | rr->sshfp.algorithm, | |
1109 | rr->sshfp.fptype, | |
1110 | t); | |
1111 | if (r < 0) | |
1112 | return NULL; | |
1113 | break; | |
1114 | ||
1115 | case DNS_TYPE_DNSKEY: { | |
1116 | _cleanup_free_ char *alg = NULL; | |
1117 | uint16_t key_tag; | |
1118 | ||
1119 | key_tag = dnssec_keytag(rr, true); | |
1120 | ||
1121 | r = dnssec_algorithm_to_string_alloc(rr->dnskey.algorithm, &alg); | |
1122 | if (r < 0) | |
1123 | return NULL; | |
1124 | ||
1125 | r = asprintf(&t, "%s %u %u %s", | |
1126 | k, | |
1127 | rr->dnskey.flags, | |
1128 | rr->dnskey.protocol, | |
1129 | alg); | |
1130 | if (r < 0) | |
1131 | return NULL; | |
1132 | ||
1133 | r = base64_append(&t, r, | |
1134 | rr->dnskey.key, rr->dnskey.key_size, | |
1135 | 8, columns()); | |
1136 | if (r < 0) | |
1137 | return NULL; | |
1138 | ||
1139 | r = asprintf(&s, "%s\n" | |
1140 | " -- Flags:%s%s%s\n" | |
1141 | " -- Key tag: %u", | |
1142 | t, | |
1143 | rr->dnskey.flags & DNSKEY_FLAG_SEP ? " SEP" : "", | |
1144 | rr->dnskey.flags & DNSKEY_FLAG_REVOKE ? " REVOKE" : "", | |
1145 | rr->dnskey.flags & DNSKEY_FLAG_ZONE_KEY ? " ZONE_KEY" : "", | |
1146 | key_tag); | |
1147 | if (r < 0) | |
1148 | return NULL; | |
1149 | ||
1150 | break; | |
1151 | } | |
1152 | ||
1153 | case DNS_TYPE_RRSIG: { | |
1154 | _cleanup_free_ char *alg = NULL; | |
1155 | char expiration[STRLEN("YYYYMMDDHHmmSS") + 1], inception[STRLEN("YYYYMMDDHHmmSS") + 1]; | |
1156 | const char *type; | |
1157 | ||
1158 | type = dns_type_to_string(rr->rrsig.type_covered); | |
1159 | ||
1160 | r = dnssec_algorithm_to_string_alloc(rr->rrsig.algorithm, &alg); | |
1161 | if (r < 0) | |
1162 | return NULL; | |
1163 | ||
1164 | r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration); | |
1165 | if (r < 0) | |
1166 | return NULL; | |
1167 | ||
1168 | r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception); | |
1169 | if (r < 0) | |
1170 | return NULL; | |
1171 | ||
1172 | /* TYPE?? follows | |
1173 | * http://tools.ietf.org/html/rfc3597#section-5 */ | |
1174 | ||
1175 | r = asprintf(&s, "%s %s%.*u %s %u %u %s %s %u %s", | |
1176 | k, | |
1177 | type ?: "TYPE", | |
1178 | type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, | |
1179 | alg, | |
1180 | rr->rrsig.labels, | |
1181 | rr->rrsig.original_ttl, | |
1182 | expiration, | |
1183 | inception, | |
1184 | rr->rrsig.key_tag, | |
1185 | rr->rrsig.signer); | |
1186 | if (r < 0) | |
1187 | return NULL; | |
1188 | ||
1189 | r = base64_append(&s, r, | |
1190 | rr->rrsig.signature, rr->rrsig.signature_size, | |
1191 | 8, columns()); | |
1192 | if (r < 0) | |
1193 | return NULL; | |
1194 | ||
1195 | break; | |
1196 | } | |
1197 | ||
1198 | case DNS_TYPE_NSEC: | |
1199 | t = format_types(rr->nsec.types); | |
1200 | if (!t) | |
1201 | return NULL; | |
1202 | ||
1203 | r = asprintf(&s, "%s %s %s", | |
1204 | k, | |
1205 | rr->nsec.next_domain_name, | |
1206 | t); | |
1207 | if (r < 0) | |
1208 | return NULL; | |
1209 | break; | |
1210 | ||
1211 | case DNS_TYPE_NSEC3: { | |
1212 | _cleanup_free_ char *salt = NULL, *hash = NULL; | |
1213 | ||
1214 | if (rr->nsec3.salt_size > 0) { | |
1215 | salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size); | |
1216 | if (!salt) | |
1217 | return NULL; | |
1218 | } | |
1219 | ||
1220 | hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false); | |
1221 | if (!hash) | |
1222 | return NULL; | |
1223 | ||
1224 | t = format_types(rr->nsec3.types); | |
1225 | if (!t) | |
1226 | return NULL; | |
1227 | ||
1228 | r = asprintf(&s, "%s %"PRIu8" %"PRIu8" %"PRIu16" %s %s %s", | |
1229 | k, | |
1230 | rr->nsec3.algorithm, | |
1231 | rr->nsec3.flags, | |
1232 | rr->nsec3.iterations, | |
1233 | rr->nsec3.salt_size > 0 ? salt : "-", | |
1234 | hash, | |
1235 | t); | |
1236 | if (r < 0) | |
1237 | return NULL; | |
1238 | ||
1239 | break; | |
1240 | } | |
1241 | ||
1242 | case DNS_TYPE_TLSA: | |
1243 | t = hexmem(rr->tlsa.data, rr->tlsa.data_size); | |
1244 | if (!t) | |
1245 | return NULL; | |
1246 | ||
1247 | r = asprintf(&s, | |
1248 | "%s %u %u %u %s\n" | |
1249 | " -- Cert. usage: %s\n" | |
1250 | " -- Selector: %s\n" | |
1251 | " -- Matching type: %s", | |
1252 | k, | |
1253 | rr->tlsa.cert_usage, | |
1254 | rr->tlsa.selector, | |
1255 | rr->tlsa.matching_type, | |
1256 | t, | |
1257 | tlsa_cert_usage_to_string(rr->tlsa.cert_usage), | |
1258 | tlsa_selector_to_string(rr->tlsa.selector), | |
1259 | tlsa_matching_type_to_string(rr->tlsa.matching_type)); | |
1260 | if (r < 0) | |
1261 | return NULL; | |
1262 | ||
1263 | break; | |
1264 | ||
1265 | case DNS_TYPE_CAA: | |
1266 | t = octescape(rr->caa.value, rr->caa.value_size); | |
1267 | if (!t) | |
1268 | return NULL; | |
1269 | ||
1270 | r = asprintf(&s, "%s %u %s \"%s\"%s%s%s%.0u", | |
1271 | k, | |
1272 | rr->caa.flags, | |
1273 | rr->caa.tag, | |
1274 | t, | |
1275 | rr->caa.flags ? "\n -- Flags:" : "", | |
1276 | rr->caa.flags & CAA_FLAG_CRITICAL ? " critical" : "", | |
1277 | rr->caa.flags & ~CAA_FLAG_CRITICAL ? " " : "", | |
1278 | rr->caa.flags & ~CAA_FLAG_CRITICAL); | |
1279 | if (r < 0) | |
1280 | return NULL; | |
1281 | ||
1282 | break; | |
1283 | ||
1284 | case DNS_TYPE_SVCB: | |
1285 | case DNS_TYPE_HTTPS: | |
1286 | t = format_svc_params(rr->svcb.params); | |
1287 | if (!t) | |
1288 | return NULL; | |
1289 | r = asprintf(&s, "%s %d %s %s", k, rr->svcb.priority, | |
1290 | isempty(rr->svcb.target_name) ? "." : rr->svcb.target_name, | |
1291 | t); | |
1292 | if (r < 0) | |
1293 | return NULL; | |
1294 | ||
1295 | break; | |
1296 | ||
1297 | case DNS_TYPE_OPENPGPKEY: | |
1298 | r = asprintf(&s, "%s", k); | |
1299 | if (r < 0) | |
1300 | return NULL; | |
1301 | ||
1302 | r = base64_append(&s, r, | |
1303 | rr->generic.data, rr->generic.data_size, | |
1304 | 8, columns()); | |
1305 | if (r < 0) | |
1306 | return NULL; | |
1307 | break; | |
1308 | ||
1309 | case DNS_TYPE_NAPTR: { | |
1310 | _cleanup_free_ char *tt = NULL, *ttt = NULL; | |
1311 | ||
1312 | t = octescape(rr->naptr.flags, SIZE_MAX); | |
1313 | if (!t) | |
1314 | return NULL; | |
1315 | ||
1316 | tt = octescape(rr->naptr.services, SIZE_MAX); | |
1317 | if (!tt) | |
1318 | return NULL; | |
1319 | ||
1320 | ttt = octescape(rr->naptr.regexp, SIZE_MAX); | |
1321 | if (!ttt) | |
1322 | return NULL; | |
1323 | ||
1324 | if (asprintf(&s, "%" PRIu16 " %" PRIu16 " \"%s\" \"%s\" \"%s\" %s.", | |
1325 | rr->naptr.order, | |
1326 | rr->naptr.preference, | |
1327 | t, | |
1328 | tt, | |
1329 | ttt, | |
1330 | rr->naptr.replacement) < 0) | |
1331 | return NULL; | |
1332 | break; | |
1333 | } | |
1334 | default: | |
1335 | /* Format as documented in RFC 3597, Section 5 */ | |
1336 | if (rr->generic.data_size == 0) | |
1337 | r = asprintf(&s, "%s \\# 0", k); | |
1338 | else { | |
1339 | t = hexmem(rr->generic.data, rr->generic.data_size); | |
1340 | if (!t) | |
1341 | return NULL; | |
1342 | r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.data_size, t); | |
1343 | } | |
1344 | if (r < 0) | |
1345 | return NULL; | |
1346 | break; | |
1347 | } | |
1348 | ||
1349 | rr->to_string = s; | |
1350 | return TAKE_PTR(s); | |
1351 | } | |
1352 | ||
1353 | ssize_t dns_resource_record_payload(DnsResourceRecord *rr, void **out) { | |
1354 | assert(rr); | |
1355 | assert(out); | |
1356 | ||
1357 | switch (rr->unparsable ? _DNS_TYPE_INVALID : rr->key->type) { | |
1358 | case DNS_TYPE_SRV: | |
1359 | case DNS_TYPE_PTR: | |
1360 | case DNS_TYPE_NS: | |
1361 | case DNS_TYPE_CNAME: | |
1362 | case DNS_TYPE_DNAME: | |
1363 | case DNS_TYPE_HINFO: | |
1364 | case DNS_TYPE_SPF: | |
1365 | case DNS_TYPE_TXT: | |
1366 | case DNS_TYPE_A: | |
1367 | case DNS_TYPE_AAAA: | |
1368 | case DNS_TYPE_SOA: | |
1369 | case DNS_TYPE_MX: | |
1370 | case DNS_TYPE_LOC: | |
1371 | case DNS_TYPE_DS: | |
1372 | case DNS_TYPE_DNSKEY: | |
1373 | case DNS_TYPE_RRSIG: | |
1374 | case DNS_TYPE_NSEC: | |
1375 | case DNS_TYPE_NSEC3: | |
1376 | return -EINVAL; | |
1377 | ||
1378 | case DNS_TYPE_SSHFP: | |
1379 | *out = rr->sshfp.fingerprint; | |
1380 | return rr->sshfp.fingerprint_size; | |
1381 | ||
1382 | case DNS_TYPE_TLSA: | |
1383 | *out = rr->tlsa.data; | |
1384 | return rr->tlsa.data_size; | |
1385 | ||
1386 | case DNS_TYPE_OPENPGPKEY: | |
1387 | default: | |
1388 | *out = rr->generic.data; | |
1389 | return rr->generic.data_size; | |
1390 | } | |
1391 | } | |
1392 | ||
1393 | int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical) { | |
1394 | ||
1395 | _cleanup_(dns_packet_unref) DnsPacket packet = { | |
1396 | .n_ref = 1, | |
1397 | .protocol = DNS_PROTOCOL_DNS, | |
1398 | .on_stack = true, | |
1399 | .refuse_compression = true, | |
1400 | .canonical_form = canonical, | |
1401 | }; | |
1402 | ||
1403 | size_t start, rds; | |
1404 | int r; | |
1405 | ||
1406 | assert(rr); | |
1407 | ||
1408 | /* Generates the RR in wire-format, optionally in the | |
1409 | * canonical form as discussed in the DNSSEC RFC 4034, Section | |
1410 | * 6.2. We allocate a throw-away DnsPacket object on the stack | |
1411 | * here, because we need some book-keeping for memory | |
1412 | * management, and can reuse the DnsPacket serializer, that | |
1413 | * can generate the canonical form, too, but also knows label | |
1414 | * compression and suchlike. */ | |
1415 | ||
1416 | if (rr->wire_format && rr->wire_format_canonical == canonical) | |
1417 | return 0; | |
1418 | ||
1419 | r = dns_packet_append_rr(&packet, rr, 0, &start, &rds); | |
1420 | if (r < 0) | |
1421 | return r; | |
1422 | ||
1423 | assert(start == 0); | |
1424 | assert(packet._data); | |
1425 | ||
1426 | free(rr->wire_format); | |
1427 | rr->wire_format = TAKE_PTR(packet._data); | |
1428 | rr->wire_format_size = packet.size; | |
1429 | rr->wire_format_rdata_offset = rds; | |
1430 | rr->wire_format_canonical = canonical; | |
1431 | ||
1432 | return 0; | |
1433 | } | |
1434 | ||
1435 | int dns_resource_record_signer(DnsResourceRecord *rr, const char **ret) { | |
1436 | const char *n; | |
1437 | int r; | |
1438 | ||
1439 | assert(rr); | |
1440 | assert(ret); | |
1441 | ||
1442 | /* Returns the RRset's signer, if it is known. */ | |
1443 | ||
1444 | if (rr->n_skip_labels_signer == UINT8_MAX) | |
1445 | return -ENODATA; | |
1446 | ||
1447 | n = dns_resource_key_name(rr->key); | |
1448 | r = dns_name_skip(n, rr->n_skip_labels_signer, &n); | |
1449 | if (r < 0) | |
1450 | return r; | |
1451 | if (r == 0) | |
1452 | return -EINVAL; | |
1453 | ||
1454 | *ret = n; | |
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | int dns_resource_record_source(DnsResourceRecord *rr, const char **ret) { | |
1459 | const char *n; | |
1460 | int r; | |
1461 | ||
1462 | assert(rr); | |
1463 | assert(ret); | |
1464 | ||
1465 | /* Returns the RRset's synthesizing source, if it is known. */ | |
1466 | ||
1467 | if (rr->n_skip_labels_source == UINT8_MAX) | |
1468 | return -ENODATA; | |
1469 | ||
1470 | n = dns_resource_key_name(rr->key); | |
1471 | r = dns_name_skip(n, rr->n_skip_labels_source, &n); | |
1472 | if (r < 0) | |
1473 | return r; | |
1474 | if (r == 0) | |
1475 | return -EINVAL; | |
1476 | ||
1477 | *ret = n; | |
1478 | return 0; | |
1479 | } | |
1480 | ||
1481 | int dns_resource_record_is_signer(DnsResourceRecord *rr, const char *zone) { | |
1482 | const char *signer; | |
1483 | int r; | |
1484 | ||
1485 | assert(rr); | |
1486 | ||
1487 | r = dns_resource_record_signer(rr, &signer); | |
1488 | if (r < 0) | |
1489 | return r; | |
1490 | ||
1491 | return dns_name_equal(zone, signer); | |
1492 | } | |
1493 | ||
1494 | int dns_resource_record_is_synthetic(DnsResourceRecord *rr) { | |
1495 | int r; | |
1496 | ||
1497 | assert(rr); | |
1498 | ||
1499 | /* Returns > 0 if the RR is generated from a wildcard, and is not the asterisk name itself */ | |
1500 | ||
1501 | if (rr->n_skip_labels_source == UINT8_MAX) | |
1502 | return -ENODATA; | |
1503 | ||
1504 | if (rr->n_skip_labels_source == 0) | |
1505 | return 0; | |
1506 | ||
1507 | if (rr->n_skip_labels_source > 1) | |
1508 | return 1; | |
1509 | ||
1510 | r = dns_name_startswith(dns_resource_key_name(rr->key), "*"); | |
1511 | if (r < 0) | |
1512 | return r; | |
1513 | ||
1514 | return !r; | |
1515 | } | |
1516 | ||
1517 | void dns_resource_record_hash_func(const DnsResourceRecord *rr, struct siphash *state) { | |
1518 | assert(rr); | |
1519 | ||
1520 | dns_resource_key_hash_func(rr->key, state); | |
1521 | ||
1522 | switch (rr->unparsable ? _DNS_TYPE_INVALID : rr->key->type) { | |
1523 | ||
1524 | case DNS_TYPE_SRV: | |
1525 | siphash24_compress_typesafe(rr->srv.priority, state); | |
1526 | siphash24_compress_typesafe(rr->srv.weight, state); | |
1527 | siphash24_compress_typesafe(rr->srv.port, state); | |
1528 | dns_name_hash_func(rr->srv.name, state); | |
1529 | break; | |
1530 | ||
1531 | case DNS_TYPE_PTR: | |
1532 | case DNS_TYPE_NS: | |
1533 | case DNS_TYPE_CNAME: | |
1534 | case DNS_TYPE_DNAME: | |
1535 | dns_name_hash_func(rr->ptr.name, state); | |
1536 | break; | |
1537 | ||
1538 | case DNS_TYPE_HINFO: | |
1539 | string_hash_func(rr->hinfo.cpu, state); | |
1540 | string_hash_func(rr->hinfo.os, state); | |
1541 | break; | |
1542 | ||
1543 | case DNS_TYPE_TXT: | |
1544 | case DNS_TYPE_SPF: { | |
1545 | LIST_FOREACH(items, j, rr->txt.items) { | |
1546 | siphash24_compress_safe(j->data, j->length, state); | |
1547 | ||
1548 | /* Add an extra NUL byte, so that "a" followed by "b" doesn't result in the same hash as "ab" | |
1549 | * followed by "". */ | |
1550 | siphash24_compress_byte(0, state); | |
1551 | } | |
1552 | break; | |
1553 | } | |
1554 | ||
1555 | case DNS_TYPE_A: | |
1556 | siphash24_compress_typesafe(rr->a.in_addr, state); | |
1557 | break; | |
1558 | ||
1559 | case DNS_TYPE_AAAA: | |
1560 | siphash24_compress_typesafe(rr->aaaa.in6_addr, state); | |
1561 | break; | |
1562 | ||
1563 | case DNS_TYPE_SOA: | |
1564 | dns_name_hash_func(rr->soa.mname, state); | |
1565 | dns_name_hash_func(rr->soa.rname, state); | |
1566 | siphash24_compress_typesafe(rr->soa.serial, state); | |
1567 | siphash24_compress_typesafe(rr->soa.refresh, state); | |
1568 | siphash24_compress_typesafe(rr->soa.retry, state); | |
1569 | siphash24_compress_typesafe(rr->soa.expire, state); | |
1570 | siphash24_compress_typesafe(rr->soa.minimum, state); | |
1571 | break; | |
1572 | ||
1573 | case DNS_TYPE_MX: | |
1574 | siphash24_compress_typesafe(rr->mx.priority, state); | |
1575 | dns_name_hash_func(rr->mx.exchange, state); | |
1576 | break; | |
1577 | ||
1578 | case DNS_TYPE_LOC: | |
1579 | siphash24_compress_typesafe(rr->loc.version, state); | |
1580 | siphash24_compress_typesafe(rr->loc.size, state); | |
1581 | siphash24_compress_typesafe(rr->loc.horiz_pre, state); | |
1582 | siphash24_compress_typesafe(rr->loc.vert_pre, state); | |
1583 | siphash24_compress_typesafe(rr->loc.latitude, state); | |
1584 | siphash24_compress_typesafe(rr->loc.longitude, state); | |
1585 | siphash24_compress_typesafe(rr->loc.altitude, state); | |
1586 | break; | |
1587 | ||
1588 | case DNS_TYPE_SSHFP: | |
1589 | siphash24_compress_typesafe(rr->sshfp.algorithm, state); | |
1590 | siphash24_compress_typesafe(rr->sshfp.fptype, state); | |
1591 | siphash24_compress_safe(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size, state); | |
1592 | break; | |
1593 | ||
1594 | case DNS_TYPE_DNSKEY: | |
1595 | siphash24_compress_typesafe(rr->dnskey.flags, state); | |
1596 | siphash24_compress_typesafe(rr->dnskey.protocol, state); | |
1597 | siphash24_compress_typesafe(rr->dnskey.algorithm, state); | |
1598 | siphash24_compress_safe(rr->dnskey.key, rr->dnskey.key_size, state); | |
1599 | break; | |
1600 | ||
1601 | case DNS_TYPE_RRSIG: | |
1602 | siphash24_compress_typesafe(rr->rrsig.type_covered, state); | |
1603 | siphash24_compress_typesafe(rr->rrsig.algorithm, state); | |
1604 | siphash24_compress_typesafe(rr->rrsig.labels, state); | |
1605 | siphash24_compress_typesafe(rr->rrsig.original_ttl, state); | |
1606 | siphash24_compress_typesafe(rr->rrsig.expiration, state); | |
1607 | siphash24_compress_typesafe(rr->rrsig.inception, state); | |
1608 | siphash24_compress_typesafe(rr->rrsig.key_tag, state); | |
1609 | dns_name_hash_func(rr->rrsig.signer, state); | |
1610 | siphash24_compress_safe(rr->rrsig.signature, rr->rrsig.signature_size, state); | |
1611 | break; | |
1612 | ||
1613 | case DNS_TYPE_NSEC: | |
1614 | dns_name_hash_func(rr->nsec.next_domain_name, state); | |
1615 | /* FIXME: we leave out the type bitmap here. Hash | |
1616 | * would be better if we'd take it into account | |
1617 | * too. */ | |
1618 | break; | |
1619 | ||
1620 | case DNS_TYPE_DS: | |
1621 | siphash24_compress_typesafe(rr->ds.key_tag, state); | |
1622 | siphash24_compress_typesafe(rr->ds.algorithm, state); | |
1623 | siphash24_compress_typesafe(rr->ds.digest_type, state); | |
1624 | siphash24_compress_safe(rr->ds.digest, rr->ds.digest_size, state); | |
1625 | break; | |
1626 | ||
1627 | case DNS_TYPE_NSEC3: | |
1628 | siphash24_compress_typesafe(rr->nsec3.algorithm, state); | |
1629 | siphash24_compress_typesafe(rr->nsec3.flags, state); | |
1630 | siphash24_compress_typesafe(rr->nsec3.iterations, state); | |
1631 | siphash24_compress_safe(rr->nsec3.salt, rr->nsec3.salt_size, state); | |
1632 | siphash24_compress_safe(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, state); | |
1633 | /* FIXME: We leave the bitmaps out */ | |
1634 | break; | |
1635 | ||
1636 | case DNS_TYPE_TLSA: | |
1637 | siphash24_compress_typesafe(rr->tlsa.cert_usage, state); | |
1638 | siphash24_compress_typesafe(rr->tlsa.selector, state); | |
1639 | siphash24_compress_typesafe(rr->tlsa.matching_type, state); | |
1640 | siphash24_compress_safe(rr->tlsa.data, rr->tlsa.data_size, state); | |
1641 | break; | |
1642 | ||
1643 | case DNS_TYPE_SVCB: | |
1644 | case DNS_TYPE_HTTPS: | |
1645 | dns_name_hash_func(rr->svcb.target_name, state); | |
1646 | siphash24_compress_typesafe(rr->svcb.priority, state); | |
1647 | LIST_FOREACH(params, j, rr->svcb.params) { | |
1648 | siphash24_compress_typesafe(j->key, state); | |
1649 | siphash24_compress_safe(j->value, j->length, state); | |
1650 | } | |
1651 | break; | |
1652 | ||
1653 | case DNS_TYPE_CAA: | |
1654 | siphash24_compress_typesafe(rr->caa.flags, state); | |
1655 | string_hash_func(rr->caa.tag, state); | |
1656 | siphash24_compress_safe(rr->caa.value, rr->caa.value_size, state); | |
1657 | break; | |
1658 | ||
1659 | case DNS_TYPE_NAPTR: | |
1660 | siphash24_compress_typesafe(rr->naptr.order, state); | |
1661 | siphash24_compress_typesafe(rr->naptr.preference, state); | |
1662 | string_hash_func(rr->naptr.flags, state); | |
1663 | string_hash_func(rr->naptr.services, state); | |
1664 | string_hash_func(rr->naptr.regexp, state); | |
1665 | dns_name_hash_func(rr->naptr.replacement, state); | |
1666 | break; | |
1667 | ||
1668 | case DNS_TYPE_OPENPGPKEY: | |
1669 | default: | |
1670 | siphash24_compress_safe(rr->generic.data, rr->generic.data_size, state); | |
1671 | break; | |
1672 | } | |
1673 | } | |
1674 | ||
1675 | int dns_resource_record_compare_func(const DnsResourceRecord *x, const DnsResourceRecord *y) { | |
1676 | int r; | |
1677 | ||
1678 | r = dns_resource_key_compare_func(x->key, y->key); | |
1679 | if (r != 0) | |
1680 | return r; | |
1681 | ||
1682 | if (dns_resource_record_payload_equal(x, y) > 0) | |
1683 | return 0; | |
1684 | ||
1685 | /* We still use CMP() here, even though don't implement proper | |
1686 | * ordering, since the hashtable doesn't need ordering anyway. */ | |
1687 | return CMP(x, y); | |
1688 | } | |
1689 | ||
1690 | DEFINE_HASH_OPS(dns_resource_record_hash_ops, DnsResourceRecord, dns_resource_record_hash_func, dns_resource_record_compare_func); | |
1691 | ||
1692 | DnsResourceRecord *dns_resource_record_copy(DnsResourceRecord *rr) { | |
1693 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *copy = NULL; | |
1694 | DnsResourceRecord *t; | |
1695 | ||
1696 | assert(rr); | |
1697 | ||
1698 | copy = dns_resource_record_new(rr->key); | |
1699 | if (!copy) | |
1700 | return NULL; | |
1701 | ||
1702 | copy->ttl = rr->ttl; | |
1703 | copy->expiry = rr->expiry; | |
1704 | copy->n_skip_labels_signer = rr->n_skip_labels_signer; | |
1705 | copy->n_skip_labels_source = rr->n_skip_labels_source; | |
1706 | copy->unparsable = rr->unparsable; | |
1707 | ||
1708 | switch (rr->unparsable ? _DNS_TYPE_INVALID : rr->key->type) { | |
1709 | ||
1710 | case DNS_TYPE_SRV: | |
1711 | copy->srv.priority = rr->srv.priority; | |
1712 | copy->srv.weight = rr->srv.weight; | |
1713 | copy->srv.port = rr->srv.port; | |
1714 | copy->srv.name = strdup(rr->srv.name); | |
1715 | if (!copy->srv.name) | |
1716 | return NULL; | |
1717 | break; | |
1718 | ||
1719 | case DNS_TYPE_PTR: | |
1720 | case DNS_TYPE_NS: | |
1721 | case DNS_TYPE_CNAME: | |
1722 | case DNS_TYPE_DNAME: | |
1723 | copy->ptr.name = strdup(rr->ptr.name); | |
1724 | if (!copy->ptr.name) | |
1725 | return NULL; | |
1726 | break; | |
1727 | ||
1728 | case DNS_TYPE_HINFO: | |
1729 | copy->hinfo.cpu = strdup(rr->hinfo.cpu); | |
1730 | if (!copy->hinfo.cpu) | |
1731 | return NULL; | |
1732 | ||
1733 | copy->hinfo.os = strdup(rr->hinfo.os); | |
1734 | if (!copy->hinfo.os) | |
1735 | return NULL; | |
1736 | break; | |
1737 | ||
1738 | case DNS_TYPE_TXT: | |
1739 | case DNS_TYPE_SPF: | |
1740 | copy->txt.items = dns_txt_item_copy(rr->txt.items); | |
1741 | if (!copy->txt.items) | |
1742 | return NULL; | |
1743 | break; | |
1744 | ||
1745 | case DNS_TYPE_A: | |
1746 | copy->a = rr->a; | |
1747 | break; | |
1748 | ||
1749 | case DNS_TYPE_AAAA: | |
1750 | copy->aaaa = rr->aaaa; | |
1751 | break; | |
1752 | ||
1753 | case DNS_TYPE_SOA: | |
1754 | copy->soa.mname = strdup(rr->soa.mname); | |
1755 | if (!copy->soa.mname) | |
1756 | return NULL; | |
1757 | copy->soa.rname = strdup(rr->soa.rname); | |
1758 | if (!copy->soa.rname) | |
1759 | return NULL; | |
1760 | copy->soa.serial = rr->soa.serial; | |
1761 | copy->soa.refresh = rr->soa.refresh; | |
1762 | copy->soa.retry = rr->soa.retry; | |
1763 | copy->soa.expire = rr->soa.expire; | |
1764 | copy->soa.minimum = rr->soa.minimum; | |
1765 | break; | |
1766 | ||
1767 | case DNS_TYPE_MX: | |
1768 | copy->mx.priority = rr->mx.priority; | |
1769 | copy->mx.exchange = strdup(rr->mx.exchange); | |
1770 | if (!copy->mx.exchange) | |
1771 | return NULL; | |
1772 | break; | |
1773 | ||
1774 | case DNS_TYPE_LOC: | |
1775 | copy->loc = rr->loc; | |
1776 | break; | |
1777 | ||
1778 | case DNS_TYPE_SSHFP: | |
1779 | copy->sshfp.algorithm = rr->sshfp.algorithm; | |
1780 | copy->sshfp.fptype = rr->sshfp.fptype; | |
1781 | copy->sshfp.fingerprint = memdup(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); | |
1782 | if (!copy->sshfp.fingerprint) | |
1783 | return NULL; | |
1784 | copy->sshfp.fingerprint_size = rr->sshfp.fingerprint_size; | |
1785 | break; | |
1786 | ||
1787 | case DNS_TYPE_DNSKEY: | |
1788 | copy->dnskey.flags = rr->dnskey.flags; | |
1789 | copy->dnskey.protocol = rr->dnskey.protocol; | |
1790 | copy->dnskey.algorithm = rr->dnskey.algorithm; | |
1791 | copy->dnskey.key = memdup(rr->dnskey.key, rr->dnskey.key_size); | |
1792 | if (!copy->dnskey.key) | |
1793 | return NULL; | |
1794 | copy->dnskey.key_size = rr->dnskey.key_size; | |
1795 | break; | |
1796 | ||
1797 | case DNS_TYPE_RRSIG: | |
1798 | copy->rrsig.type_covered = rr->rrsig.type_covered; | |
1799 | copy->rrsig.algorithm = rr->rrsig.algorithm; | |
1800 | copy->rrsig.labels = rr->rrsig.labels; | |
1801 | copy->rrsig.original_ttl = rr->rrsig.original_ttl; | |
1802 | copy->rrsig.expiration = rr->rrsig.expiration; | |
1803 | copy->rrsig.inception = rr->rrsig.inception; | |
1804 | copy->rrsig.key_tag = rr->rrsig.key_tag; | |
1805 | copy->rrsig.signer = strdup(rr->rrsig.signer); | |
1806 | if (!copy->rrsig.signer) | |
1807 | return NULL; | |
1808 | copy->rrsig.signature = memdup(rr->rrsig.signature, rr->rrsig.signature_size); | |
1809 | if (!copy->rrsig.signature) | |
1810 | return NULL; | |
1811 | copy->rrsig.signature_size = rr->rrsig.signature_size; | |
1812 | break; | |
1813 | ||
1814 | case DNS_TYPE_NSEC: | |
1815 | copy->nsec.next_domain_name = strdup(rr->nsec.next_domain_name); | |
1816 | if (!copy->nsec.next_domain_name) | |
1817 | return NULL; | |
1818 | if (rr->nsec.types) { | |
1819 | copy->nsec.types = bitmap_copy(rr->nsec.types); | |
1820 | if (!copy->nsec.types) | |
1821 | return NULL; | |
1822 | } | |
1823 | break; | |
1824 | ||
1825 | case DNS_TYPE_DS: | |
1826 | copy->ds.key_tag = rr->ds.key_tag; | |
1827 | copy->ds.algorithm = rr->ds.algorithm; | |
1828 | copy->ds.digest_type = rr->ds.digest_type; | |
1829 | copy->ds.digest = memdup(rr->ds.digest, rr->ds.digest_size); | |
1830 | if (!copy->ds.digest) | |
1831 | return NULL; | |
1832 | copy->ds.digest_size = rr->ds.digest_size; | |
1833 | break; | |
1834 | ||
1835 | case DNS_TYPE_NSEC3: | |
1836 | copy->nsec3.algorithm = rr->nsec3.algorithm; | |
1837 | copy->nsec3.flags = rr->nsec3.flags; | |
1838 | copy->nsec3.iterations = rr->nsec3.iterations; | |
1839 | copy->nsec3.salt = memdup(rr->nsec3.salt, rr->nsec3.salt_size); | |
1840 | if (!copy->nsec3.salt) | |
1841 | return NULL; | |
1842 | copy->nsec3.salt_size = rr->nsec3.salt_size; | |
1843 | copy->nsec3.next_hashed_name = memdup(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size); | |
1844 | if (!copy->nsec3.next_hashed_name) | |
1845 | return NULL; | |
1846 | copy->nsec3.next_hashed_name_size = rr->nsec3.next_hashed_name_size; | |
1847 | if (rr->nsec3.types) { | |
1848 | copy->nsec3.types = bitmap_copy(rr->nsec3.types); | |
1849 | if (!copy->nsec3.types) | |
1850 | return NULL; | |
1851 | } | |
1852 | break; | |
1853 | ||
1854 | case DNS_TYPE_TLSA: | |
1855 | copy->tlsa.cert_usage = rr->tlsa.cert_usage; | |
1856 | copy->tlsa.selector = rr->tlsa.selector; | |
1857 | copy->tlsa.matching_type = rr->tlsa.matching_type; | |
1858 | copy->tlsa.data = memdup(rr->tlsa.data, rr->tlsa.data_size); | |
1859 | if (!copy->tlsa.data) | |
1860 | return NULL; | |
1861 | copy->tlsa.data_size = rr->tlsa.data_size; | |
1862 | break; | |
1863 | ||
1864 | case DNS_TYPE_CAA: | |
1865 | copy->caa.flags = rr->caa.flags; | |
1866 | copy->caa.tag = strdup(rr->caa.tag); | |
1867 | if (!copy->caa.tag) | |
1868 | return NULL; | |
1869 | copy->caa.value = memdup(rr->caa.value, rr->caa.value_size); | |
1870 | if (!copy->caa.value) | |
1871 | return NULL; | |
1872 | copy->caa.value_size = rr->caa.value_size; | |
1873 | break; | |
1874 | ||
1875 | case DNS_TYPE_SVCB: | |
1876 | case DNS_TYPE_HTTPS: | |
1877 | copy->svcb.priority = rr->svcb.priority; | |
1878 | copy->svcb.target_name = strdup(rr->svcb.target_name); | |
1879 | if (!copy->svcb.target_name) | |
1880 | return NULL; | |
1881 | copy->svcb.params = dns_svc_params_copy(rr->svcb.params); | |
1882 | if (rr->svcb.params && !copy->svcb.params) | |
1883 | return NULL; | |
1884 | break; | |
1885 | ||
1886 | case DNS_TYPE_NAPTR: | |
1887 | copy->naptr.order = rr->naptr.order; | |
1888 | copy->naptr.preference = rr->naptr.preference; | |
1889 | copy->naptr.flags = strdup(rr->naptr.flags); | |
1890 | if (!copy->naptr.flags) | |
1891 | return NULL; | |
1892 | copy->naptr.services = strdup(rr->naptr.services); | |
1893 | if (!copy->naptr.services) | |
1894 | return NULL; | |
1895 | copy->naptr.regexp = strdup(rr->naptr.regexp); | |
1896 | if (!copy->naptr.regexp) | |
1897 | return NULL; | |
1898 | copy->naptr.replacement = strdup(rr->naptr.replacement); | |
1899 | if (!copy->naptr.replacement) | |
1900 | return NULL; | |
1901 | break; | |
1902 | ||
1903 | case DNS_TYPE_OPT: | |
1904 | default: | |
1905 | copy->generic.data = memdup(rr->generic.data, rr->generic.data_size); | |
1906 | if (!copy->generic.data) | |
1907 | return NULL; | |
1908 | copy->generic.data_size = rr->generic.data_size; | |
1909 | break; | |
1910 | } | |
1911 | ||
1912 | t = TAKE_PTR(copy); | |
1913 | ||
1914 | return t; | |
1915 | } | |
1916 | ||
1917 | int dns_resource_record_clamp_ttl(DnsResourceRecord **rr, uint32_t max_ttl) { | |
1918 | DnsResourceRecord *old_rr, *new_rr; | |
1919 | uint32_t new_ttl; | |
1920 | ||
1921 | assert(rr); | |
1922 | old_rr = *rr; | |
1923 | ||
1924 | if (old_rr->key->type == DNS_TYPE_OPT) | |
1925 | return -EINVAL; | |
1926 | ||
1927 | new_ttl = MIN(old_rr->ttl, max_ttl); | |
1928 | if (new_ttl == old_rr->ttl) | |
1929 | return 0; | |
1930 | ||
1931 | if (old_rr->n_ref == 1) { | |
1932 | /* Patch in place */ | |
1933 | old_rr->ttl = new_ttl; | |
1934 | return 1; | |
1935 | } | |
1936 | ||
1937 | new_rr = dns_resource_record_copy(old_rr); | |
1938 | if (!new_rr) | |
1939 | return -ENOMEM; | |
1940 | ||
1941 | new_rr->ttl = new_ttl; | |
1942 | ||
1943 | DNS_RR_REPLACE(*rr, new_rr); | |
1944 | return 1; | |
1945 | } | |
1946 | ||
1947 | bool dns_resource_record_is_link_local_address(DnsResourceRecord *rr) { | |
1948 | assert(rr); | |
1949 | ||
1950 | if (rr->key->class != DNS_CLASS_IN) | |
1951 | return false; | |
1952 | ||
1953 | if (rr->key->type == DNS_TYPE_A) | |
1954 | return in4_addr_is_link_local(&rr->a.in_addr); | |
1955 | ||
1956 | if (rr->key->type == DNS_TYPE_AAAA) | |
1957 | return in6_addr_is_link_local(&rr->aaaa.in6_addr); | |
1958 | ||
1959 | return false; | |
1960 | } | |
1961 | ||
1962 | int dns_resource_record_get_cname_target(DnsResourceKey *key, DnsResourceRecord *cname, char **ret) { | |
1963 | _cleanup_free_ char *d = NULL; | |
1964 | int r; | |
1965 | ||
1966 | assert(key); | |
1967 | assert(cname); | |
1968 | ||
1969 | /* Checks if the RR `cname` is a CNAME/DNAME RR that matches the specified `key`. If so, returns the | |
1970 | * target domain. If not, returns -EUNATCH */ | |
1971 | ||
1972 | if (key->class != cname->key->class && key->class != DNS_CLASS_ANY) | |
1973 | return -EUNATCH; | |
1974 | ||
1975 | if (!dns_type_may_redirect(key->type)) /* This key type is not subject to CNAME/DNAME redirection? | |
1976 | * Then let's refuse right-away */ | |
1977 | return -EUNATCH; | |
1978 | ||
1979 | if (cname->key->type == DNS_TYPE_CNAME) { | |
1980 | r = dns_name_equal(dns_resource_key_name(key), | |
1981 | dns_resource_key_name(cname->key)); | |
1982 | if (r < 0) | |
1983 | return r; | |
1984 | if (r == 0) | |
1985 | return -EUNATCH; /* CNAME RR key doesn't actually match the original key */ | |
1986 | ||
1987 | d = strdup(cname->cname.name); | |
1988 | if (!d) | |
1989 | return -ENOMEM; | |
1990 | ||
1991 | } else if (cname->key->type == DNS_TYPE_DNAME) { | |
1992 | ||
1993 | r = dns_name_change_suffix( | |
1994 | dns_resource_key_name(key), | |
1995 | dns_resource_key_name(cname->key), | |
1996 | cname->dname.name, | |
1997 | &d); | |
1998 | if (r < 0) | |
1999 | return r; | |
2000 | if (r == 0) | |
2001 | return -EUNATCH; /* DNAME RR key doesn't actually match the original key */ | |
2002 | ||
2003 | } else | |
2004 | return -EUNATCH; /* Not a CNAME/DNAME RR, hence doesn't match the proposition either */ | |
2005 | ||
2006 | *ret = TAKE_PTR(d); | |
2007 | return 0; | |
2008 | } | |
2009 | ||
2010 | DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *first) { | |
2011 | LIST_FOREACH(items, i, first) | |
2012 | free(i); | |
2013 | ||
2014 | return NULL; | |
2015 | } | |
2016 | ||
2017 | DnsSvcParam *dns_svc_param_free_all(DnsSvcParam *first) { | |
2018 | LIST_FOREACH(params, i, first) | |
2019 | free(i); | |
2020 | ||
2021 | return NULL; | |
2022 | } | |
2023 | ||
2024 | bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) { | |
2025 | DnsTxtItem *bb = b; | |
2026 | ||
2027 | if (a == b) | |
2028 | return true; | |
2029 | ||
2030 | LIST_FOREACH(items, aa, a) { | |
2031 | if (!bb) | |
2032 | return false; | |
2033 | ||
2034 | if (memcmp_nn(aa->data, aa->length, bb->data, bb->length) != 0) | |
2035 | return false; | |
2036 | ||
2037 | bb = bb->items_next; | |
2038 | } | |
2039 | ||
2040 | return !bb; | |
2041 | } | |
2042 | ||
2043 | DnsTxtItem *dns_txt_item_copy(DnsTxtItem *first) { | |
2044 | DnsTxtItem *copy = NULL, *end = NULL; | |
2045 | ||
2046 | LIST_FOREACH(items, i, first) { | |
2047 | DnsTxtItem *j; | |
2048 | ||
2049 | j = memdup(i, offsetof(DnsTxtItem, data) + i->length + 1); | |
2050 | if (!j) | |
2051 | return dns_txt_item_free_all(copy); | |
2052 | ||
2053 | LIST_INSERT_AFTER(items, copy, end, j); | |
2054 | end = j; | |
2055 | } | |
2056 | ||
2057 | return copy; | |
2058 | } | |
2059 | ||
2060 | bool dns_svc_params_equal(DnsSvcParam *a, DnsSvcParam *b) { | |
2061 | DnsSvcParam *bb = b; | |
2062 | ||
2063 | if (a == b) | |
2064 | return true; | |
2065 | ||
2066 | LIST_FOREACH(params, aa, a) { | |
2067 | if (!bb) | |
2068 | return false; | |
2069 | ||
2070 | if (aa->key != bb->key) | |
2071 | return false; | |
2072 | ||
2073 | if (memcmp_nn(aa->value, aa->length, bb->value, bb->length) != 0) | |
2074 | return false; | |
2075 | ||
2076 | bb = bb->params_next; | |
2077 | } | |
2078 | ||
2079 | return !bb; | |
2080 | } | |
2081 | ||
2082 | DnsSvcParam *dns_svc_params_copy(DnsSvcParam *first) { | |
2083 | DnsSvcParam *copy = NULL, *end = NULL; | |
2084 | ||
2085 | LIST_FOREACH(params, i, first) { | |
2086 | DnsSvcParam *j; | |
2087 | ||
2088 | j = memdup(i, offsetof(DnsSvcParam, value) + i->length); | |
2089 | if (!j) | |
2090 | return dns_svc_param_free_all(copy); | |
2091 | ||
2092 | LIST_INSERT_AFTER(params, copy, end, j); | |
2093 | end = j; | |
2094 | } | |
2095 | ||
2096 | return copy; | |
2097 | } | |
2098 | ||
2099 | int dns_txt_item_new_empty(DnsTxtItem **ret) { | |
2100 | DnsTxtItem *i; | |
2101 | ||
2102 | assert(ret); | |
2103 | ||
2104 | /* RFC 6763, section 6.1 suggests to treat | |
2105 | * empty TXT RRs as equivalent to a TXT record | |
2106 | * with a single empty string. */ | |
2107 | ||
2108 | i = malloc0(offsetof(DnsTxtItem, data) + 1); /* for safety reasons we add an extra NUL byte */ | |
2109 | if (!i) | |
2110 | return -ENOMEM; | |
2111 | ||
2112 | *ret = i; | |
2113 | return 0; | |
2114 | } | |
2115 | ||
2116 | int dns_resource_record_new_from_raw(DnsResourceRecord **ret, const void *data, size_t size) { | |
2117 | _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL; | |
2118 | int r; | |
2119 | ||
2120 | r = dns_packet_new(&p, DNS_PROTOCOL_DNS, 0, DNS_PACKET_SIZE_MAX); | |
2121 | if (r < 0) | |
2122 | return r; | |
2123 | ||
2124 | p->refuse_compression = true; | |
2125 | ||
2126 | r = dns_packet_append_blob(p, data, size, NULL); | |
2127 | if (r < 0) | |
2128 | return r; | |
2129 | ||
2130 | return dns_packet_read_rr(p, ret, NULL, NULL); | |
2131 | } | |
2132 | ||
2133 | int dns_resource_key_to_json(DnsResourceKey *key, JsonVariant **ret) { | |
2134 | assert(key); | |
2135 | assert(ret); | |
2136 | ||
2137 | return json_build(ret, | |
2138 | JSON_BUILD_OBJECT( | |
2139 | JSON_BUILD_PAIR("class", JSON_BUILD_INTEGER(key->class)), | |
2140 | JSON_BUILD_PAIR("type", JSON_BUILD_INTEGER(key->type)), | |
2141 | JSON_BUILD_PAIR("name", JSON_BUILD_STRING(dns_resource_key_name(key))))); | |
2142 | } | |
2143 | ||
2144 | int dns_resource_key_from_json(JsonVariant *v, DnsResourceKey **ret) { | |
2145 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
2146 | uint16_t type = 0, class = 0; | |
2147 | const char *name = NULL; | |
2148 | int r; | |
2149 | ||
2150 | JsonDispatch dispatch_table[] = { | |
2151 | { "class", _JSON_VARIANT_TYPE_INVALID, json_dispatch_uint16, PTR_TO_SIZE(&class), JSON_MANDATORY }, | |
2152 | { "type", _JSON_VARIANT_TYPE_INVALID, json_dispatch_uint16, PTR_TO_SIZE(&type), JSON_MANDATORY }, | |
2153 | { "name", JSON_VARIANT_STRING, json_dispatch_const_string, PTR_TO_SIZE(&name), JSON_MANDATORY }, | |
2154 | {} | |
2155 | }; | |
2156 | ||
2157 | assert(v); | |
2158 | assert(ret); | |
2159 | ||
2160 | r = json_dispatch(v, dispatch_table, 0, NULL); | |
2161 | if (r < 0) | |
2162 | return r; | |
2163 | ||
2164 | key = dns_resource_key_new(class, type, name); | |
2165 | if (!key) | |
2166 | return -ENOMEM; | |
2167 | ||
2168 | *ret = TAKE_PTR(key); | |
2169 | return 0; | |
2170 | } | |
2171 | ||
2172 | static int type_bitmap_to_json(Bitmap *b, JsonVariant **ret) { | |
2173 | _cleanup_(json_variant_unrefp) JsonVariant *l = NULL; | |
2174 | unsigned t; | |
2175 | int r; | |
2176 | ||
2177 | assert(ret); | |
2178 | ||
2179 | BITMAP_FOREACH(t, b) { | |
2180 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; | |
2181 | ||
2182 | r = json_variant_new_unsigned(&v, t); | |
2183 | if (r < 0) | |
2184 | return r; | |
2185 | ||
2186 | r = json_variant_append_array(&l, v); | |
2187 | if (r < 0) | |
2188 | return r; | |
2189 | } | |
2190 | ||
2191 | if (!l) | |
2192 | return json_variant_new_array(ret, NULL, 0); | |
2193 | ||
2194 | *ret = TAKE_PTR(l); | |
2195 | return 0; | |
2196 | } | |
2197 | ||
2198 | static int txt_to_json(DnsTxtItem *items, JsonVariant **ret) { | |
2199 | JsonVariant **elements = NULL; | |
2200 | size_t n = 0; | |
2201 | int r; | |
2202 | ||
2203 | assert(ret); | |
2204 | ||
2205 | LIST_FOREACH(items, i, items) { | |
2206 | if (!GREEDY_REALLOC(elements, n + 1)) { | |
2207 | r = -ENOMEM; | |
2208 | goto finalize; | |
2209 | } | |
2210 | ||
2211 | r = json_variant_new_octescape(elements + n, i->data, i->length); | |
2212 | if (r < 0) | |
2213 | goto finalize; | |
2214 | ||
2215 | n++; | |
2216 | } | |
2217 | ||
2218 | r = json_variant_new_array(ret, elements, n); | |
2219 | ||
2220 | finalize: | |
2221 | json_variant_unref_many(elements, n); | |
2222 | return r; | |
2223 | } | |
2224 | ||
2225 | static int svc_params_to_json(DnsSvcParam *params, JsonVariant **ret) { | |
2226 | JsonVariant **elements = NULL; | |
2227 | size_t n = 0; | |
2228 | int r; | |
2229 | ||
2230 | assert(ret); | |
2231 | ||
2232 | LIST_FOREACH(params, i, params) { | |
2233 | if (!GREEDY_REALLOC(elements, n + 1)) { | |
2234 | r = -ENOMEM; | |
2235 | goto finalize; | |
2236 | } | |
2237 | ||
2238 | r = json_variant_new_base64(elements + n, i->value, i->length); | |
2239 | if (r < 0) | |
2240 | goto finalize; | |
2241 | ||
2242 | n++; | |
2243 | } | |
2244 | ||
2245 | r = json_variant_new_array(ret, elements, n); | |
2246 | finalize: | |
2247 | json_variant_unref_many(elements, n); | |
2248 | return r; | |
2249 | } | |
2250 | ||
2251 | int dns_resource_record_to_json(DnsResourceRecord *rr, JsonVariant **ret) { | |
2252 | _cleanup_(json_variant_unrefp) JsonVariant *k = NULL; | |
2253 | int r; | |
2254 | ||
2255 | assert(rr); | |
2256 | assert(ret); | |
2257 | ||
2258 | r = dns_resource_key_to_json(rr->key, &k); | |
2259 | if (r < 0) | |
2260 | return r; | |
2261 | ||
2262 | switch (rr->unparsable ? _DNS_TYPE_INVALID : rr->key->type) { | |
2263 | ||
2264 | case DNS_TYPE_SRV: | |
2265 | return json_build(ret, | |
2266 | JSON_BUILD_OBJECT( | |
2267 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2268 | JSON_BUILD_PAIR("priority", JSON_BUILD_UNSIGNED(rr->srv.priority)), | |
2269 | JSON_BUILD_PAIR("weight", JSON_BUILD_UNSIGNED(rr->srv.weight)), | |
2270 | JSON_BUILD_PAIR("port", JSON_BUILD_UNSIGNED(rr->srv.port)), | |
2271 | JSON_BUILD_PAIR("name", JSON_BUILD_STRING(rr->srv.name)))); | |
2272 | ||
2273 | case DNS_TYPE_PTR: | |
2274 | case DNS_TYPE_NS: | |
2275 | case DNS_TYPE_CNAME: | |
2276 | case DNS_TYPE_DNAME: | |
2277 | return json_build(ret, | |
2278 | JSON_BUILD_OBJECT( | |
2279 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2280 | JSON_BUILD_PAIR("name", JSON_BUILD_STRING(rr->ptr.name)))); | |
2281 | ||
2282 | case DNS_TYPE_HINFO: | |
2283 | return json_build(ret, | |
2284 | JSON_BUILD_OBJECT( | |
2285 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2286 | JSON_BUILD_PAIR("cpu", JSON_BUILD_STRING(rr->hinfo.cpu)), | |
2287 | JSON_BUILD_PAIR("os", JSON_BUILD_STRING(rr->hinfo.os)))); | |
2288 | ||
2289 | case DNS_TYPE_SPF: | |
2290 | case DNS_TYPE_TXT: { | |
2291 | _cleanup_(json_variant_unrefp) JsonVariant *l = NULL; | |
2292 | ||
2293 | r = txt_to_json(rr->txt.items, &l); | |
2294 | if (r < 0) | |
2295 | return r; | |
2296 | ||
2297 | return json_build(ret, | |
2298 | JSON_BUILD_OBJECT( | |
2299 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2300 | JSON_BUILD_PAIR("items", JSON_BUILD_VARIANT(l)))); | |
2301 | } | |
2302 | ||
2303 | case DNS_TYPE_A: | |
2304 | return json_build(ret, | |
2305 | JSON_BUILD_OBJECT( | |
2306 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2307 | JSON_BUILD_PAIR("address", JSON_BUILD_IN4_ADDR(&rr->a.in_addr)))); | |
2308 | ||
2309 | case DNS_TYPE_AAAA: | |
2310 | return json_build(ret, | |
2311 | JSON_BUILD_OBJECT( | |
2312 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2313 | JSON_BUILD_PAIR("address", JSON_BUILD_IN6_ADDR(&rr->aaaa.in6_addr)))); | |
2314 | ||
2315 | case DNS_TYPE_SOA: | |
2316 | return json_build(ret, | |
2317 | JSON_BUILD_OBJECT( | |
2318 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2319 | JSON_BUILD_PAIR("mname", JSON_BUILD_STRING(rr->soa.mname)), | |
2320 | JSON_BUILD_PAIR("rname", JSON_BUILD_STRING(rr->soa.rname)), | |
2321 | JSON_BUILD_PAIR("serial", JSON_BUILD_UNSIGNED(rr->soa.serial)), | |
2322 | JSON_BUILD_PAIR("refresh", JSON_BUILD_UNSIGNED(rr->soa.refresh)), | |
2323 | JSON_BUILD_PAIR("expire", JSON_BUILD_UNSIGNED(rr->soa.retry)), | |
2324 | JSON_BUILD_PAIR("minimum", JSON_BUILD_UNSIGNED(rr->soa.minimum)))); | |
2325 | ||
2326 | case DNS_TYPE_MX: | |
2327 | return json_build(ret, | |
2328 | JSON_BUILD_OBJECT( | |
2329 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2330 | JSON_BUILD_PAIR("priority", JSON_BUILD_UNSIGNED(rr->mx.priority)), | |
2331 | JSON_BUILD_PAIR("exchange", JSON_BUILD_STRING(rr->mx.exchange)))); | |
2332 | case DNS_TYPE_LOC: | |
2333 | return json_build(ret, | |
2334 | JSON_BUILD_OBJECT( | |
2335 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2336 | JSON_BUILD_PAIR("version", JSON_BUILD_UNSIGNED(rr->loc.version)), | |
2337 | JSON_BUILD_PAIR("size", JSON_BUILD_UNSIGNED(rr->loc.size)), | |
2338 | JSON_BUILD_PAIR("horiz_pre", JSON_BUILD_UNSIGNED(rr->loc.horiz_pre)), | |
2339 | JSON_BUILD_PAIR("vert_pre", JSON_BUILD_UNSIGNED(rr->loc.vert_pre)), | |
2340 | JSON_BUILD_PAIR("latitude", JSON_BUILD_UNSIGNED(rr->loc.latitude)), | |
2341 | JSON_BUILD_PAIR("longitude", JSON_BUILD_UNSIGNED(rr->loc.longitude)), | |
2342 | JSON_BUILD_PAIR("altitude", JSON_BUILD_UNSIGNED(rr->loc.altitude)))); | |
2343 | ||
2344 | case DNS_TYPE_DS: | |
2345 | return json_build(ret, | |
2346 | JSON_BUILD_OBJECT( | |
2347 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2348 | JSON_BUILD_PAIR("keyTag", JSON_BUILD_UNSIGNED(rr->ds.key_tag)), | |
2349 | JSON_BUILD_PAIR("algorithm", JSON_BUILD_UNSIGNED(rr->ds.algorithm)), | |
2350 | JSON_BUILD_PAIR("digestType", JSON_BUILD_UNSIGNED(rr->ds.digest_type)), | |
2351 | JSON_BUILD_PAIR("digest", JSON_BUILD_HEX(rr->ds.digest, rr->ds.digest_size)))); | |
2352 | ||
2353 | case DNS_TYPE_SSHFP: | |
2354 | return json_build(ret, | |
2355 | JSON_BUILD_OBJECT( | |
2356 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2357 | JSON_BUILD_PAIR("algorithm", JSON_BUILD_UNSIGNED(rr->sshfp.algorithm)), | |
2358 | JSON_BUILD_PAIR("fptype", JSON_BUILD_UNSIGNED(rr->sshfp.fptype)), | |
2359 | JSON_BUILD_PAIR("fingerprint", JSON_BUILD_HEX(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size)))); | |
2360 | ||
2361 | case DNS_TYPE_DNSKEY: | |
2362 | return json_build(ret, | |
2363 | JSON_BUILD_OBJECT( | |
2364 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2365 | JSON_BUILD_PAIR("flags", JSON_BUILD_UNSIGNED(rr->dnskey.flags)), | |
2366 | JSON_BUILD_PAIR("protocol", JSON_BUILD_UNSIGNED(rr->dnskey.protocol)), | |
2367 | JSON_BUILD_PAIR("algorithm", JSON_BUILD_UNSIGNED(rr->dnskey.algorithm)), | |
2368 | JSON_BUILD_PAIR("dnskey", JSON_BUILD_BASE64(rr->dnskey.key, rr->dnskey.key_size)))); | |
2369 | ||
2370 | ||
2371 | case DNS_TYPE_RRSIG: | |
2372 | return json_build(ret, | |
2373 | JSON_BUILD_OBJECT( | |
2374 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2375 | JSON_BUILD_PAIR("signer", JSON_BUILD_STRING(rr->rrsig.signer)), | |
2376 | JSON_BUILD_PAIR("typeCovered", JSON_BUILD_UNSIGNED(rr->rrsig.type_covered)), | |
2377 | JSON_BUILD_PAIR("algorithm", JSON_BUILD_UNSIGNED(rr->rrsig.algorithm)), | |
2378 | JSON_BUILD_PAIR("labels", JSON_BUILD_UNSIGNED(rr->rrsig.labels)), | |
2379 | JSON_BUILD_PAIR("originalTtl", JSON_BUILD_UNSIGNED(rr->rrsig.original_ttl)), | |
2380 | JSON_BUILD_PAIR("expiration", JSON_BUILD_UNSIGNED(rr->rrsig.expiration)), | |
2381 | JSON_BUILD_PAIR("inception", JSON_BUILD_UNSIGNED(rr->rrsig.inception)), | |
2382 | JSON_BUILD_PAIR("keyTag", JSON_BUILD_UNSIGNED(rr->rrsig.key_tag)), | |
2383 | JSON_BUILD_PAIR("signature", JSON_BUILD_BASE64(rr->rrsig.signature, rr->rrsig.signature_size)))); | |
2384 | ||
2385 | case DNS_TYPE_NSEC: { | |
2386 | _cleanup_(json_variant_unrefp) JsonVariant *bm = NULL; | |
2387 | ||
2388 | r = type_bitmap_to_json(rr->nsec.types, &bm); | |
2389 | if (r < 0) | |
2390 | return r; | |
2391 | ||
2392 | return json_build(ret, | |
2393 | JSON_BUILD_OBJECT( | |
2394 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2395 | JSON_BUILD_PAIR("nextDomain", JSON_BUILD_STRING(rr->nsec.next_domain_name)), | |
2396 | JSON_BUILD_PAIR("types", JSON_BUILD_VARIANT(bm)))); | |
2397 | } | |
2398 | ||
2399 | case DNS_TYPE_NSEC3: { | |
2400 | _cleanup_(json_variant_unrefp) JsonVariant *bm = NULL; | |
2401 | ||
2402 | r = type_bitmap_to_json(rr->nsec3.types, &bm); | |
2403 | if (r < 0) | |
2404 | return r; | |
2405 | ||
2406 | return json_build(ret, | |
2407 | JSON_BUILD_OBJECT( | |
2408 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2409 | JSON_BUILD_PAIR("algorithm", JSON_BUILD_UNSIGNED(rr->nsec3.algorithm)), | |
2410 | JSON_BUILD_PAIR("flags", JSON_BUILD_UNSIGNED(rr->nsec3.flags)), | |
2411 | JSON_BUILD_PAIR("iterations", JSON_BUILD_UNSIGNED(rr->nsec3.iterations)), | |
2412 | JSON_BUILD_PAIR("salt", JSON_BUILD_HEX(rr->nsec3.salt, rr->nsec3.salt_size)), | |
2413 | JSON_BUILD_PAIR("hash", JSON_BUILD_BASE32HEX(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size)), | |
2414 | JSON_BUILD_PAIR("types", JSON_BUILD_VARIANT(bm)))); | |
2415 | } | |
2416 | ||
2417 | case DNS_TYPE_TLSA: | |
2418 | return json_build(ret, | |
2419 | JSON_BUILD_OBJECT( | |
2420 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2421 | JSON_BUILD_PAIR("certUsage", JSON_BUILD_UNSIGNED(rr->tlsa.cert_usage)), | |
2422 | JSON_BUILD_PAIR("selector", JSON_BUILD_UNSIGNED(rr->tlsa.selector)), | |
2423 | JSON_BUILD_PAIR("matchingType", JSON_BUILD_UNSIGNED(rr->tlsa.matching_type)), | |
2424 | JSON_BUILD_PAIR("data", JSON_BUILD_HEX(rr->tlsa.data, rr->tlsa.data_size)))); | |
2425 | ||
2426 | case DNS_TYPE_SVCB: | |
2427 | case DNS_TYPE_HTTPS: { | |
2428 | _cleanup_(json_variant_unrefp) JsonVariant *p = NULL; | |
2429 | r = svc_params_to_json(rr->svcb.params, &p); | |
2430 | if (r < 0) | |
2431 | return r; | |
2432 | ||
2433 | return json_build(ret, | |
2434 | JSON_BUILD_OBJECT( | |
2435 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2436 | JSON_BUILD_PAIR("priority", JSON_BUILD_UNSIGNED(rr->svcb.priority)), | |
2437 | JSON_BUILD_PAIR("target", JSON_BUILD_STRING(rr->svcb.target_name)), | |
2438 | JSON_BUILD_PAIR("params", JSON_BUILD_VARIANT(p)))); | |
2439 | } | |
2440 | ||
2441 | case DNS_TYPE_CAA: | |
2442 | return json_build(ret, | |
2443 | JSON_BUILD_OBJECT( | |
2444 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2445 | JSON_BUILD_PAIR("flags", JSON_BUILD_UNSIGNED(rr->caa.flags)), | |
2446 | JSON_BUILD_PAIR("tag", JSON_BUILD_STRING(rr->caa.tag)), | |
2447 | JSON_BUILD_PAIR("value", JSON_BUILD_OCTESCAPE(rr->caa.value, rr->caa.value_size)))); | |
2448 | ||
2449 | case DNS_TYPE_NAPTR: | |
2450 | return json_build(ret, | |
2451 | JSON_BUILD_OBJECT( | |
2452 | JSON_BUILD_PAIR("key", JSON_BUILD_VARIANT(k)), | |
2453 | JSON_BUILD_PAIR("order", JSON_BUILD_UNSIGNED(rr->naptr.order)), | |
2454 | JSON_BUILD_PAIR("preference", JSON_BUILD_UNSIGNED(rr->naptr.preference)), | |
2455 | /* NB: we name this flags field here naptrFlags, because there's already another "flags" field (for example in CAA) which has a different type */ | |
2456 | JSON_BUILD_PAIR("naptrFlags", JSON_BUILD_STRING(rr->naptr.flags)), | |
2457 | JSON_BUILD_PAIR("services", JSON_BUILD_STRING(rr->naptr.services)), | |
2458 | JSON_BUILD_PAIR("regexp", JSON_BUILD_STRING(rr->naptr.regexp)), | |
2459 | JSON_BUILD_PAIR("replacement", JSON_BUILD_STRING(rr->naptr.replacement)))); | |
2460 | ||
2461 | default: | |
2462 | /* Can't provide broken-down format */ | |
2463 | *ret = NULL; | |
2464 | return 0; | |
2465 | } | |
2466 | } | |
2467 | ||
2468 | static const char* const dnssec_algorithm_table[_DNSSEC_ALGORITHM_MAX_DEFINED] = { | |
2469 | /* Mnemonics as listed on https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */ | |
2470 | [DNSSEC_ALGORITHM_RSAMD5] = "RSAMD5", | |
2471 | [DNSSEC_ALGORITHM_DH] = "DH", | |
2472 | [DNSSEC_ALGORITHM_DSA] = "DSA", | |
2473 | [DNSSEC_ALGORITHM_ECC] = "ECC", | |
2474 | [DNSSEC_ALGORITHM_RSASHA1] = "RSASHA1", | |
2475 | [DNSSEC_ALGORITHM_DSA_NSEC3_SHA1] = "DSA-NSEC3-SHA1", | |
2476 | [DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1] = "RSASHA1-NSEC3-SHA1", | |
2477 | [DNSSEC_ALGORITHM_RSASHA256] = "RSASHA256", | |
2478 | [DNSSEC_ALGORITHM_RSASHA512] = "RSASHA512", | |
2479 | [DNSSEC_ALGORITHM_ECC_GOST] = "ECC-GOST", | |
2480 | [DNSSEC_ALGORITHM_ECDSAP256SHA256] = "ECDSAP256SHA256", | |
2481 | [DNSSEC_ALGORITHM_ECDSAP384SHA384] = "ECDSAP384SHA384", | |
2482 | [DNSSEC_ALGORITHM_ED25519] = "ED25519", | |
2483 | [DNSSEC_ALGORITHM_ED448] = "ED448", | |
2484 | [DNSSEC_ALGORITHM_INDIRECT] = "INDIRECT", | |
2485 | [DNSSEC_ALGORITHM_PRIVATEDNS] = "PRIVATEDNS", | |
2486 | [DNSSEC_ALGORITHM_PRIVATEOID] = "PRIVATEOID", | |
2487 | }; | |
2488 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_algorithm, int, 255); | |
2489 | ||
2490 | static const char* const dnssec_digest_table[_DNSSEC_DIGEST_MAX_DEFINED] = { | |
2491 | /* Names as listed on https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml */ | |
2492 | [DNSSEC_DIGEST_SHA1] = "SHA-1", | |
2493 | [DNSSEC_DIGEST_SHA256] = "SHA-256", | |
2494 | [DNSSEC_DIGEST_GOST_R_34_11_94] = "GOST_R_34.11-94", | |
2495 | [DNSSEC_DIGEST_SHA384] = "SHA-384", | |
2496 | }; | |
2497 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_digest, int, 255); |