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74b2466e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
0dae31d4 ZJS |
22 | #include <math.h> |
23 | ||
b5efdb8a | 24 | #include "alloc-util.h" |
4ad7f276 | 25 | #include "dns-domain.h" |
7263f724 | 26 | #include "dns-type.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 | ||
70 | r = dns_name_change_suffix(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(cname->key), cname->dname.name, &destination); | |
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); | |
77 | if (!k) { | |
78 | free(destination); | |
79 | return NULL; | |
80 | } | |
81 | ||
82 | return k; | |
83 | } | |
36d9205d TG |
84 | } |
85 | ||
801ad6a6 LP |
86 | int dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name) { |
87 | DnsResourceKey *new_key; | |
88 | char *joined; | |
89 | int r; | |
90 | ||
91 | assert(ret); | |
92 | assert(key); | |
93 | assert(name); | |
94 | ||
dc477e73 | 95 | if (dns_name_is_root(name)) { |
801ad6a6 LP |
96 | *ret = dns_resource_key_ref(key); |
97 | return 0; | |
98 | } | |
99 | ||
100 | r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), name, &joined); | |
101 | if (r < 0) | |
102 | return r; | |
103 | ||
104 | new_key = dns_resource_key_new_consume(key->class, key->type, joined); | |
105 | if (!new_key) { | |
106 | free(joined); | |
107 | return -ENOMEM; | |
108 | } | |
109 | ||
110 | *ret = new_key; | |
111 | return 0; | |
112 | } | |
113 | ||
faa133f3 LP |
114 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) { |
115 | DnsResourceKey *k; | |
116 | ||
117 | assert(name); | |
118 | ||
119 | k = new0(DnsResourceKey, 1); | |
120 | if (!k) | |
121 | return NULL; | |
122 | ||
123 | k->n_ref = 1; | |
124 | k->class = class; | |
125 | k->type = type; | |
126 | k->_name = name; | |
127 | ||
128 | return k; | |
129 | } | |
130 | ||
131 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) { | |
132 | ||
133 | if (!k) | |
134 | return NULL; | |
135 | ||
1b4f6e79 LP |
136 | /* Static/const keys created with DNS_RESOURCE_KEY_CONST will |
137 | * set this to -1, they should not be reffed/unreffed */ | |
138 | assert(k->n_ref != (unsigned) -1); | |
139 | ||
faa133f3 LP |
140 | assert(k->n_ref > 0); |
141 | k->n_ref++; | |
142 | ||
143 | return k; | |
144 | } | |
145 | ||
146 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) { | |
147 | if (!k) | |
148 | return NULL; | |
149 | ||
1b4f6e79 | 150 | assert(k->n_ref != (unsigned) -1); |
faa133f3 LP |
151 | assert(k->n_ref > 0); |
152 | ||
153 | if (k->n_ref == 1) { | |
154 | free(k->_name); | |
155 | free(k); | |
156 | } else | |
157 | k->n_ref--; | |
158 | ||
159 | return NULL; | |
160 | } | |
161 | ||
28b9b764 LP |
162 | bool dns_resource_key_is_address(const DnsResourceKey *key) { |
163 | assert(key); | |
164 | ||
165 | /* Check if this is an A or AAAA resource key */ | |
166 | ||
167 | return key->class == DNS_CLASS_IN && IN_SET(key->type, DNS_TYPE_A, DNS_TYPE_AAAA); | |
168 | } | |
169 | ||
faa133f3 LP |
170 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) { |
171 | int r; | |
172 | ||
4d247a6c LP |
173 | if (a == b) |
174 | return 1; | |
175 | ||
faa133f3 LP |
176 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b)); |
177 | if (r <= 0) | |
178 | return r; | |
179 | ||
180 | if (a->class != b->class) | |
181 | return 0; | |
182 | ||
183 | if (a->type != b->type) | |
184 | return 0; | |
185 | ||
186 | return 1; | |
187 | } | |
188 | ||
105e1512 | 189 | int dns_resource_key_match_rr(const DnsResourceKey *key, DnsResourceRecord *rr, const char *search_domain) { |
801ad6a6 LP |
190 | int r; |
191 | ||
faa133f3 LP |
192 | assert(key); |
193 | assert(rr); | |
194 | ||
4d247a6c LP |
195 | if (key == rr->key) |
196 | return 1; | |
197 | ||
801ad6a6 LP |
198 | /* Checks if an rr matches the specified key. If a search |
199 | * domain is specified, it will also be checked if the key | |
200 | * with the search domain suffixed might match the RR. */ | |
201 | ||
faa133f3 LP |
202 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) |
203 | return 0; | |
204 | ||
205 | if (rr->key->type != key->type && key->type != DNS_TYPE_ANY) | |
206 | return 0; | |
207 | ||
801ad6a6 LP |
208 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key)); |
209 | if (r != 0) | |
210 | return r; | |
211 | ||
212 | if (search_domain) { | |
213 | _cleanup_free_ char *joined = NULL; | |
214 | ||
215 | r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), search_domain, &joined); | |
216 | if (r < 0) | |
217 | return r; | |
218 | ||
219 | return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), joined); | |
220 | } | |
221 | ||
222 | return 0; | |
faa133f3 LP |
223 | } |
224 | ||
5d27351f | 225 | int dns_resource_key_match_cname_or_dname(const DnsResourceKey *key, const DnsResourceKey *cname, const char *search_domain) { |
801ad6a6 LP |
226 | int r; |
227 | ||
faa133f3 | 228 | assert(key); |
5d27351f | 229 | assert(cname); |
faa133f3 | 230 | |
5d27351f | 231 | if (cname->class != key->class && key->class != DNS_CLASS_ANY) |
faa133f3 LP |
232 | return 0; |
233 | ||
5d27351f TG |
234 | if (cname->type == DNS_TYPE_CNAME) |
235 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(cname)); | |
236 | else if (cname->type == DNS_TYPE_DNAME) | |
237 | r = dns_name_endswith(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(cname)); | |
58db254a | 238 | else |
faa133f3 | 239 | return 0; |
801ad6a6 LP |
240 | |
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, &joined); | |
248 | if (r < 0) | |
249 | return r; | |
250 | ||
5d27351f TG |
251 | if (cname->type == DNS_TYPE_CNAME) |
252 | return dns_name_equal(joined, DNS_RESOURCE_KEY_NAME(cname)); | |
253 | else if (cname->type == DNS_TYPE_DNAME) | |
254 | return dns_name_endswith(joined, DNS_RESOURCE_KEY_NAME(cname)); | |
801ad6a6 LP |
255 | } |
256 | ||
257 | return 0; | |
547973de LP |
258 | } |
259 | ||
260 | int dns_resource_key_match_soa(const DnsResourceKey *key, const DnsResourceKey *soa) { | |
261 | assert(soa); | |
262 | assert(key); | |
263 | ||
264 | /* Checks whether 'soa' is a SOA record for the specified key. */ | |
265 | ||
65b200e7 | 266 | if (soa->class != key->class) |
547973de | 267 | return 0; |
801ad6a6 | 268 | |
547973de LP |
269 | if (soa->type != DNS_TYPE_SOA) |
270 | return 0; | |
271 | ||
0936416a | 272 | return dns_name_endswith(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(soa)); |
74b2466e LP |
273 | } |
274 | ||
b826ab58 | 275 | static void dns_resource_key_hash_func(const void *i, struct siphash *state) { |
322345fd | 276 | const DnsResourceKey *k = i; |
322345fd | 277 | |
b826ab58 | 278 | assert(k); |
322345fd | 279 | |
b826ab58 TG |
280 | dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), state); |
281 | siphash24_compress(&k->class, sizeof(k->class), state); | |
282 | siphash24_compress(&k->type, sizeof(k->type), state); | |
322345fd LP |
283 | } |
284 | ||
d5099efc | 285 | static int dns_resource_key_compare_func(const void *a, const void *b) { |
322345fd LP |
286 | const DnsResourceKey *x = a, *y = b; |
287 | int ret; | |
288 | ||
faa133f3 | 289 | ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y)); |
322345fd LP |
290 | if (ret != 0) |
291 | return ret; | |
292 | ||
293 | if (x->type < y->type) | |
294 | return -1; | |
295 | if (x->type > y->type) | |
296 | return 1; | |
297 | ||
298 | if (x->class < y->class) | |
299 | return -1; | |
300 | if (x->class > y->class) | |
301 | return 1; | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
d5099efc MS |
306 | const struct hash_ops dns_resource_key_hash_ops = { |
307 | .hash = dns_resource_key_hash_func, | |
308 | .compare = dns_resource_key_compare_func | |
309 | }; | |
310 | ||
2d4c5cbc | 311 | int dns_resource_key_to_string(const DnsResourceKey *key, char **ret) { |
d23a27a9 | 312 | char cbuf[strlen("CLASS") + DECIMAL_STR_MAX(uint16_t)], tbuf[strlen("TYPE") + DECIMAL_STR_MAX(uint16_t)]; |
f2af5ea3 | 313 | const char *c, *t, *n; |
2d4c5cbc LP |
314 | char *s; |
315 | ||
6af47493 LP |
316 | /* If we cannot convert the CLASS/TYPE into a known string, |
317 | use the format recommended by RFC 3597, Section 5. */ | |
318 | ||
2d4c5cbc LP |
319 | c = dns_class_to_string(key->class); |
320 | if (!c) { | |
d23a27a9 | 321 | sprintf(cbuf, "CLASS%u", key->class); |
2d4c5cbc LP |
322 | c = cbuf; |
323 | } | |
324 | ||
325 | t = dns_type_to_string(key->type); | |
326 | if (!t){ | |
d23a27a9 | 327 | sprintf(tbuf, "TYPE%u", key->type); |
2d4c5cbc LP |
328 | t = tbuf; |
329 | } | |
330 | ||
f2af5ea3 LP |
331 | n = DNS_RESOURCE_KEY_NAME(key); |
332 | if (asprintf(&s, "%s%s %s %-5s", n, endswith(n, ".") ? "" : ".", c, t) < 0) | |
2d4c5cbc LP |
333 | return -ENOMEM; |
334 | ||
335 | *ret = s; | |
336 | return 0; | |
337 | } | |
338 | ||
f57e3cd5 LP |
339 | bool dns_resource_key_reduce(DnsResourceKey **a, DnsResourceKey **b) { |
340 | assert(a); | |
341 | assert(b); | |
342 | ||
343 | /* Try to replace one RR key by another if they are identical, thus saving a bit of memory. Note that we do | |
344 | * this only for RR keys, not for RRs themselves, as they carry a lot of additional metadata (where they come | |
345 | * from, validity data, and suchlike), and cannot be replaced so easily by other RRs that have the same | |
346 | * superficial data. */ | |
347 | ||
348 | if (!*a) | |
349 | return false; | |
350 | if (!*b) | |
351 | return false; | |
352 | ||
353 | /* We refuse merging const keys */ | |
354 | if ((*a)->n_ref == (unsigned) -1) | |
355 | return false; | |
356 | if ((*b)->n_ref == (unsigned) -1) | |
357 | return false; | |
358 | ||
359 | /* Already the same? */ | |
360 | if (*a == *b) | |
361 | return true; | |
362 | ||
363 | /* Are they really identical? */ | |
364 | if (dns_resource_key_equal(*a, *b) <= 0) | |
365 | return false; | |
366 | ||
367 | /* Keep the one which already has more references. */ | |
368 | if ((*a)->n_ref > (*b)->n_ref) { | |
369 | dns_resource_key_unref(*b); | |
370 | *b = dns_resource_key_ref(*a); | |
371 | } else { | |
372 | dns_resource_key_unref(*a); | |
373 | *a = dns_resource_key_ref(*b); | |
374 | } | |
375 | ||
376 | return true; | |
377 | } | |
378 | ||
faa133f3 | 379 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { |
74b2466e LP |
380 | DnsResourceRecord *rr; |
381 | ||
382 | rr = new0(DnsResourceRecord, 1); | |
383 | if (!rr) | |
384 | return NULL; | |
385 | ||
386 | rr->n_ref = 1; | |
faa133f3 | 387 | rr->key = dns_resource_key_ref(key); |
ee3d6aff | 388 | rr->expiry = USEC_INFINITY; |
97c67192 | 389 | rr->n_skip_labels_signer = rr->n_skip_labels_source = (unsigned) -1; |
faa133f3 | 390 | |
74b2466e LP |
391 | return rr; |
392 | } | |
393 | ||
8bf52d3d LP |
394 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) { |
395 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
396 | ||
397 | key = dns_resource_key_new(class, type, name); | |
398 | if (!key) | |
399 | return NULL; | |
400 | ||
401 | return dns_resource_record_new(key); | |
402 | } | |
403 | ||
74b2466e LP |
404 | DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) { |
405 | if (!rr) | |
406 | return NULL; | |
407 | ||
408 | assert(rr->n_ref > 0); | |
409 | rr->n_ref++; | |
410 | ||
411 | return rr; | |
412 | } | |
413 | ||
414 | DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) { | |
415 | if (!rr) | |
416 | return NULL; | |
417 | ||
418 | assert(rr->n_ref > 0); | |
419 | ||
420 | if (rr->n_ref > 1) { | |
421 | rr->n_ref--; | |
422 | return NULL; | |
423 | } | |
424 | ||
faa133f3 | 425 | if (rr->key) { |
9de3e329 | 426 | switch(rr->key->type) { |
9c92ce6d LP |
427 | |
428 | case DNS_TYPE_SRV: | |
429 | free(rr->srv.name); | |
430 | break; | |
431 | ||
9de3e329 ZJS |
432 | case DNS_TYPE_PTR: |
433 | case DNS_TYPE_NS: | |
434 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 435 | case DNS_TYPE_DNAME: |
faa133f3 | 436 | free(rr->ptr.name); |
9de3e329 | 437 | break; |
9c92ce6d | 438 | |
9de3e329 | 439 | case DNS_TYPE_HINFO: |
faa133f3 LP |
440 | free(rr->hinfo.cpu); |
441 | free(rr->hinfo.os); | |
9de3e329 | 442 | break; |
9c92ce6d | 443 | |
9de3e329 | 444 | case DNS_TYPE_TXT: |
9c92ce6d | 445 | case DNS_TYPE_SPF: |
2001c805 | 446 | dns_txt_item_free_all(rr->txt.items); |
9de3e329 | 447 | break; |
9c92ce6d | 448 | |
9de3e329 | 449 | case DNS_TYPE_SOA: |
7e8e0422 LP |
450 | free(rr->soa.mname); |
451 | free(rr->soa.rname); | |
9de3e329 | 452 | break; |
9c92ce6d | 453 | |
9de3e329 | 454 | case DNS_TYPE_MX: |
946c7094 | 455 | free(rr->mx.exchange); |
9de3e329 | 456 | break; |
9c92ce6d | 457 | |
abf126a3 TG |
458 | case DNS_TYPE_DS: |
459 | free(rr->ds.digest); | |
460 | break; | |
461 | ||
42cc2eeb | 462 | case DNS_TYPE_SSHFP: |
549c1a25 | 463 | free(rr->sshfp.fingerprint); |
42cc2eeb LP |
464 | break; |
465 | ||
8db0d2f5 ZJS |
466 | case DNS_TYPE_DNSKEY: |
467 | free(rr->dnskey.key); | |
468 | break; | |
469 | ||
151226ab ZJS |
470 | case DNS_TYPE_RRSIG: |
471 | free(rr->rrsig.signer); | |
472 | free(rr->rrsig.signature); | |
473 | break; | |
474 | ||
50f1e641 TG |
475 | case DNS_TYPE_NSEC: |
476 | free(rr->nsec.next_domain_name); | |
477 | bitmap_free(rr->nsec.types); | |
478 | break; | |
479 | ||
5d45a880 TG |
480 | case DNS_TYPE_NSEC3: |
481 | free(rr->nsec3.next_hashed_name); | |
482 | free(rr->nsec3.salt); | |
483 | bitmap_free(rr->nsec3.types); | |
484 | break; | |
485 | ||
0dae31d4 | 486 | case DNS_TYPE_LOC: |
9de3e329 ZJS |
487 | case DNS_TYPE_A: |
488 | case DNS_TYPE_AAAA: | |
489 | break; | |
9c92ce6d | 490 | |
48d45d2b ZJS |
491 | case DNS_TYPE_TLSA: |
492 | free(rr->tlsa.data); | |
493 | break; | |
494 | ||
d93a16b8 | 495 | case DNS_TYPE_OPENPGPKEY: |
9de3e329 | 496 | default: |
faa133f3 | 497 | free(rr->generic.data); |
9de3e329 | 498 | } |
322345fd | 499 | |
a8812dd7 | 500 | free(rr->wire_format); |
faa133f3 LP |
501 | dns_resource_key_unref(rr->key); |
502 | } | |
322345fd | 503 | |
7b50eb2e | 504 | free(rr->to_string); |
faa133f3 | 505 | free(rr); |
322345fd | 506 | |
322345fd LP |
507 | return NULL; |
508 | } | |
509 | ||
623a4c97 LP |
510 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) { |
511 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
512 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; | |
513 | _cleanup_free_ char *ptr = NULL; | |
514 | int r; | |
515 | ||
516 | assert(ret); | |
517 | assert(address); | |
518 | assert(hostname); | |
519 | ||
520 | r = dns_name_reverse(family, address, &ptr); | |
521 | if (r < 0) | |
522 | return r; | |
523 | ||
524 | key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr); | |
525 | if (!key) | |
526 | return -ENOMEM; | |
527 | ||
528 | ptr = NULL; | |
529 | ||
530 | rr = dns_resource_record_new(key); | |
531 | if (!rr) | |
532 | return -ENOMEM; | |
533 | ||
534 | rr->ptr.name = strdup(hostname); | |
535 | if (!rr->ptr.name) | |
536 | return -ENOMEM; | |
537 | ||
538 | *ret = rr; | |
539 | rr = NULL; | |
540 | ||
541 | return 0; | |
542 | } | |
543 | ||
78c6a153 LP |
544 | int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name) { |
545 | DnsResourceRecord *rr; | |
546 | ||
547 | assert(ret); | |
548 | assert(address); | |
549 | assert(family); | |
550 | ||
551 | if (family == AF_INET) { | |
552 | ||
553 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, name); | |
554 | if (!rr) | |
555 | return -ENOMEM; | |
556 | ||
557 | rr->a.in_addr = address->in; | |
558 | ||
559 | } else if (family == AF_INET6) { | |
560 | ||
561 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, name); | |
562 | if (!rr) | |
563 | return -ENOMEM; | |
564 | ||
565 | rr->aaaa.in6_addr = address->in6; | |
566 | } else | |
567 | return -EAFNOSUPPORT; | |
568 | ||
569 | *ret = rr; | |
570 | ||
571 | return 0; | |
572 | } | |
573 | ||
a43a068a ZJS |
574 | #define FIELD_EQUAL(a, b, field) \ |
575 | ((a).field ## _size == (b).field ## _size && \ | |
576 | memcmp((a).field, (b).field, (a).field ## _size) == 0) | |
577 | ||
322345fd LP |
578 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { |
579 | int r; | |
580 | ||
581 | assert(a); | |
582 | assert(b); | |
583 | ||
4d247a6c LP |
584 | if (a == b) |
585 | return 1; | |
586 | ||
faa133f3 | 587 | r = dns_resource_key_equal(a->key, b->key); |
322345fd LP |
588 | if (r <= 0) |
589 | return r; | |
590 | ||
fd0b4602 LP |
591 | if (a->unparseable != b->unparseable) |
592 | return 0; | |
593 | ||
594 | switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) { | |
2d4c5cbc | 595 | |
9c92ce6d LP |
596 | case DNS_TYPE_SRV: |
597 | r = dns_name_equal(a->srv.name, b->srv.name); | |
598 | if (r <= 0) | |
599 | return r; | |
600 | ||
601 | return a->srv.priority == b->srv.priority && | |
602 | a->srv.weight == b->srv.weight && | |
603 | a->srv.port == b->srv.port; | |
604 | ||
2d4c5cbc LP |
605 | case DNS_TYPE_PTR: |
606 | case DNS_TYPE_NS: | |
607 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 608 | case DNS_TYPE_DNAME: |
322345fd | 609 | return dns_name_equal(a->ptr.name, b->ptr.name); |
2d4c5cbc LP |
610 | |
611 | case DNS_TYPE_HINFO: | |
612 | return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && | |
613 | strcaseeq(a->hinfo.os, b->hinfo.os); | |
614 | ||
9de3e329 | 615 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
0f84a72e | 616 | case DNS_TYPE_TXT: |
2001c805 | 617 | return dns_txt_item_equal(a->txt.items, b->txt.items); |
2e276efc | 618 | |
2d4c5cbc | 619 | case DNS_TYPE_A: |
322345fd | 620 | return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; |
2d4c5cbc LP |
621 | |
622 | case DNS_TYPE_AAAA: | |
322345fd | 623 | return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; |
2d4c5cbc LP |
624 | |
625 | case DNS_TYPE_SOA: | |
7e8e0422 LP |
626 | r = dns_name_equal(a->soa.mname, b->soa.mname); |
627 | if (r <= 0) | |
628 | return r; | |
629 | r = dns_name_equal(a->soa.rname, b->soa.rname); | |
630 | if (r <= 0) | |
631 | return r; | |
632 | ||
633 | return a->soa.serial == b->soa.serial && | |
634 | a->soa.refresh == b->soa.refresh && | |
635 | a->soa.retry == b->soa.retry && | |
636 | a->soa.expire == b->soa.expire && | |
637 | a->soa.minimum == b->soa.minimum; | |
9c92ce6d | 638 | |
946c7094 ZJS |
639 | case DNS_TYPE_MX: |
640 | if (a->mx.priority != b->mx.priority) | |
641 | return 0; | |
642 | ||
643 | return dns_name_equal(a->mx.exchange, b->mx.exchange); | |
644 | ||
0dae31d4 ZJS |
645 | case DNS_TYPE_LOC: |
646 | assert(a->loc.version == b->loc.version); | |
647 | ||
648 | return a->loc.size == b->loc.size && | |
649 | a->loc.horiz_pre == b->loc.horiz_pre && | |
650 | a->loc.vert_pre == b->loc.vert_pre && | |
651 | a->loc.latitude == b->loc.latitude && | |
652 | a->loc.longitude == b->loc.longitude && | |
653 | a->loc.altitude == b->loc.altitude; | |
654 | ||
abf126a3 TG |
655 | case DNS_TYPE_DS: |
656 | return a->ds.key_tag == b->ds.key_tag && | |
657 | a->ds.algorithm == b->ds.algorithm && | |
658 | a->ds.digest_type == b->ds.digest_type && | |
a43a068a | 659 | FIELD_EQUAL(a->ds, b->ds, digest); |
abf126a3 | 660 | |
42cc2eeb LP |
661 | case DNS_TYPE_SSHFP: |
662 | return a->sshfp.algorithm == b->sshfp.algorithm && | |
663 | a->sshfp.fptype == b->sshfp.fptype && | |
a43a068a | 664 | FIELD_EQUAL(a->sshfp, b->sshfp, fingerprint); |
42cc2eeb | 665 | |
8db0d2f5 | 666 | case DNS_TYPE_DNSKEY: |
f91dc240 LP |
667 | return a->dnskey.flags == b->dnskey.flags && |
668 | a->dnskey.protocol == b->dnskey.protocol && | |
8db0d2f5 | 669 | a->dnskey.algorithm == b->dnskey.algorithm && |
a43a068a | 670 | FIELD_EQUAL(a->dnskey, b->dnskey, key); |
8db0d2f5 | 671 | |
151226ab ZJS |
672 | case DNS_TYPE_RRSIG: |
673 | /* do the fast comparisons first */ | |
a43a068a ZJS |
674 | return a->rrsig.type_covered == b->rrsig.type_covered && |
675 | a->rrsig.algorithm == b->rrsig.algorithm && | |
676 | a->rrsig.labels == b->rrsig.labels && | |
677 | a->rrsig.original_ttl == b->rrsig.original_ttl && | |
678 | a->rrsig.expiration == b->rrsig.expiration && | |
679 | a->rrsig.inception == b->rrsig.inception && | |
680 | a->rrsig.key_tag == b->rrsig.key_tag && | |
681 | FIELD_EQUAL(a->rrsig, b->rrsig, signature) && | |
682 | dns_name_equal(a->rrsig.signer, b->rrsig.signer); | |
151226ab | 683 | |
50f1e641 TG |
684 | case DNS_TYPE_NSEC: |
685 | return dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name) && | |
686 | bitmap_equal(a->nsec.types, b->nsec.types); | |
687 | ||
5d45a880 TG |
688 | case DNS_TYPE_NSEC3: |
689 | return a->nsec3.algorithm == b->nsec3.algorithm && | |
a43a068a ZJS |
690 | a->nsec3.flags == b->nsec3.flags && |
691 | a->nsec3.iterations == b->nsec3.iterations && | |
692 | FIELD_EQUAL(a->nsec3, b->nsec3, salt) && | |
693 | FIELD_EQUAL(a->nsec3, b->nsec3, next_hashed_name) && | |
694 | bitmap_equal(a->nsec3.types, b->nsec3.types); | |
5d45a880 | 695 | |
48d45d2b ZJS |
696 | case DNS_TYPE_TLSA: |
697 | return a->tlsa.cert_usage == b->tlsa.cert_usage && | |
698 | a->tlsa.selector == b->tlsa.selector && | |
699 | a->tlsa.matching_type == b->tlsa.matching_type && | |
a43a068a | 700 | FIELD_EQUAL(a->tlsa, b->tlsa, data); |
48d45d2b | 701 | |
2d4c5cbc | 702 | default: |
a43a068a | 703 | return FIELD_EQUAL(a->generic, b->generic, data); |
2d4c5cbc | 704 | } |
322345fd LP |
705 | } |
706 | ||
0dae31d4 ZJS |
707 | static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude, |
708 | uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) { | |
709 | char *s; | |
710 | char NS = latitude >= 1U<<31 ? 'N' : 'S'; | |
711 | char EW = longitude >= 1U<<31 ? 'E' : 'W'; | |
712 | ||
713 | int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude); | |
714 | int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude); | |
715 | double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude); | |
716 | double siz = (size >> 4) * exp10((double) (size & 0xF)); | |
717 | double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF)); | |
718 | double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF)); | |
719 | ||
720 | if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm", | |
721 | (lat / 60000 / 60), | |
722 | (lat / 60000) % 60, | |
723 | (lat % 60000) / 1000., | |
724 | NS, | |
725 | (lon / 60000 / 60), | |
726 | (lon / 60000) % 60, | |
727 | (lon % 60000) / 1000., | |
728 | EW, | |
729 | alt / 100., | |
730 | siz / 100., | |
731 | hor / 100., | |
732 | ver / 100.) < 0) | |
733 | return NULL; | |
734 | ||
735 | return s; | |
736 | } | |
737 | ||
7c6423e1 TG |
738 | static int format_timestamp_dns(char *buf, size_t l, time_t sec) { |
739 | struct tm tm; | |
740 | ||
741 | assert(buf); | |
742 | assert(l > strlen("YYYYMMDDHHmmSS")); | |
743 | ||
744 | if (!gmtime_r(&sec, &tm)) | |
745 | return -EINVAL; | |
746 | ||
747 | if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0) | |
748 | return -EINVAL; | |
749 | ||
750 | return 0; | |
751 | } | |
752 | ||
50f1e641 TG |
753 | static char *format_types(Bitmap *types) { |
754 | _cleanup_strv_free_ char **strv = NULL; | |
755 | _cleanup_free_ char *str = NULL; | |
cb57dd41 | 756 | Iterator i; |
50f1e641 TG |
757 | unsigned type; |
758 | int r; | |
759 | ||
cb57dd41 | 760 | BITMAP_FOREACH(type, types, i) { |
50f1e641 | 761 | if (dns_type_to_string(type)) { |
2c1fb4f7 | 762 | r = strv_extend(&strv, dns_type_to_string(type)); |
50f1e641 TG |
763 | if (r < 0) |
764 | return NULL; | |
765 | } else { | |
766 | char *t; | |
767 | ||
768 | r = asprintf(&t, "TYPE%u", type); | |
769 | if (r < 0) | |
770 | return NULL; | |
771 | ||
2c1fb4f7 | 772 | r = strv_consume(&strv, t); |
50f1e641 TG |
773 | if (r < 0) |
774 | return NULL; | |
775 | } | |
776 | } | |
777 | ||
778 | str = strv_join(strv, " "); | |
779 | if (!str) | |
780 | return NULL; | |
781 | ||
782 | return strjoin("( ", str, " )", NULL); | |
783 | } | |
784 | ||
2001c805 LP |
785 | static char *format_txt(DnsTxtItem *first) { |
786 | DnsTxtItem *i; | |
787 | size_t c = 1; | |
788 | char *p, *s; | |
789 | ||
790 | LIST_FOREACH(items, i, first) | |
791 | c += i->length * 4 + 3; | |
792 | ||
793 | p = s = new(char, c); | |
794 | if (!s) | |
795 | return NULL; | |
796 | ||
797 | LIST_FOREACH(items, i, first) { | |
798 | size_t j; | |
799 | ||
800 | if (i != first) | |
801 | *(p++) = ' '; | |
802 | ||
803 | *(p++) = '"'; | |
804 | ||
805 | for (j = 0; j < i->length; j++) { | |
806 | if (i->data[j] < ' ' || i->data[j] == '"' || i->data[j] >= 127) { | |
807 | *(p++) = '\\'; | |
808 | *(p++) = '0' + (i->data[j] / 100); | |
809 | *(p++) = '0' + ((i->data[j] / 10) % 10); | |
810 | *(p++) = '0' + (i->data[j] % 10); | |
811 | } else | |
812 | *(p++) = i->data[j]; | |
813 | } | |
814 | ||
815 | *(p++) = '"'; | |
816 | } | |
817 | ||
818 | *p = 0; | |
819 | return s; | |
820 | } | |
821 | ||
7b50eb2e | 822 | const char *dns_resource_record_to_string(DnsResourceRecord *rr) { |
8db0d2f5 | 823 | _cleanup_free_ char *k = NULL, *t = NULL; |
2d4c5cbc LP |
824 | char *s; |
825 | int r; | |
322345fd | 826 | |
2d4c5cbc | 827 | assert(rr); |
322345fd | 828 | |
7b50eb2e LP |
829 | if (rr->to_string) |
830 | return rr->to_string; | |
831 | ||
2d4c5cbc LP |
832 | r = dns_resource_key_to_string(rr->key, &k); |
833 | if (r < 0) | |
7b50eb2e | 834 | return NULL; |
322345fd | 835 | |
0dae31d4 | 836 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { |
322345fd | 837 | |
9c92ce6d LP |
838 | case DNS_TYPE_SRV: |
839 | r = asprintf(&s, "%s %u %u %u %s", | |
840 | k, | |
841 | rr->srv.priority, | |
842 | rr->srv.weight, | |
843 | rr->srv.port, | |
844 | strna(rr->srv.name)); | |
845 | if (r < 0) | |
7b50eb2e | 846 | return NULL; |
9c92ce6d LP |
847 | break; |
848 | ||
2d4c5cbc LP |
849 | case DNS_TYPE_PTR: |
850 | case DNS_TYPE_NS: | |
851 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 852 | case DNS_TYPE_DNAME: |
2d4c5cbc LP |
853 | s = strjoin(k, " ", rr->ptr.name, NULL); |
854 | if (!s) | |
7b50eb2e | 855 | return NULL; |
322345fd | 856 | |
2d4c5cbc | 857 | break; |
322345fd | 858 | |
2d4c5cbc LP |
859 | case DNS_TYPE_HINFO: |
860 | s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL); | |
861 | if (!s) | |
7b50eb2e | 862 | return NULL; |
2d4c5cbc | 863 | break; |
322345fd | 864 | |
9de3e329 | 865 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
8db0d2f5 | 866 | case DNS_TYPE_TXT: |
2001c805 | 867 | t = format_txt(rr->txt.items); |
2e276efc | 868 | if (!t) |
7b50eb2e | 869 | return NULL; |
2e276efc ZJS |
870 | |
871 | s = strjoin(k, " ", t, NULL); | |
872 | if (!s) | |
7b50eb2e | 873 | return NULL; |
2e276efc | 874 | break; |
2e276efc | 875 | |
2d4c5cbc LP |
876 | case DNS_TYPE_A: { |
877 | _cleanup_free_ char *x = NULL; | |
322345fd | 878 | |
2d4c5cbc LP |
879 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x); |
880 | if (r < 0) | |
7b50eb2e | 881 | return NULL; |
322345fd | 882 | |
2d4c5cbc LP |
883 | s = strjoin(k, " ", x, NULL); |
884 | if (!s) | |
7b50eb2e | 885 | return NULL; |
2d4c5cbc LP |
886 | break; |
887 | } | |
322345fd | 888 | |
8db0d2f5 ZJS |
889 | case DNS_TYPE_AAAA: |
890 | r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); | |
2d4c5cbc | 891 | if (r < 0) |
7b50eb2e | 892 | return NULL; |
322345fd | 893 | |
8db0d2f5 | 894 | s = strjoin(k, " ", t, NULL); |
2d4c5cbc | 895 | if (!s) |
7b50eb2e | 896 | return NULL; |
2d4c5cbc | 897 | break; |
322345fd | 898 | |
2d4c5cbc LP |
899 | case DNS_TYPE_SOA: |
900 | r = asprintf(&s, "%s %s %s %u %u %u %u %u", | |
901 | k, | |
902 | strna(rr->soa.mname), | |
903 | strna(rr->soa.rname), | |
904 | rr->soa.serial, | |
905 | rr->soa.refresh, | |
906 | rr->soa.retry, | |
907 | rr->soa.expire, | |
908 | rr->soa.minimum); | |
909 | if (r < 0) | |
7b50eb2e | 910 | return NULL; |
2d4c5cbc LP |
911 | break; |
912 | ||
946c7094 ZJS |
913 | case DNS_TYPE_MX: |
914 | r = asprintf(&s, "%s %u %s", | |
915 | k, | |
916 | rr->mx.priority, | |
917 | rr->mx.exchange); | |
918 | if (r < 0) | |
7b50eb2e | 919 | return NULL; |
946c7094 ZJS |
920 | break; |
921 | ||
8db0d2f5 | 922 | case DNS_TYPE_LOC: |
0dae31d4 ZJS |
923 | assert(rr->loc.version == 0); |
924 | ||
8db0d2f5 ZJS |
925 | t = format_location(rr->loc.latitude, |
926 | rr->loc.longitude, | |
927 | rr->loc.altitude, | |
928 | rr->loc.size, | |
929 | rr->loc.horiz_pre, | |
930 | rr->loc.vert_pre); | |
931 | if (!t) | |
7b50eb2e | 932 | return NULL; |
0dae31d4 | 933 | |
8db0d2f5 | 934 | s = strjoin(k, " ", t, NULL); |
0dae31d4 | 935 | if (!s) |
7b50eb2e | 936 | return NULL; |
0dae31d4 | 937 | break; |
0dae31d4 | 938 | |
abf126a3 TG |
939 | case DNS_TYPE_DS: |
940 | t = hexmem(rr->ds.digest, rr->ds.digest_size); | |
941 | if (!t) | |
7b50eb2e | 942 | return NULL; |
abf126a3 TG |
943 | |
944 | r = asprintf(&s, "%s %u %u %u %s", | |
945 | k, | |
946 | rr->ds.key_tag, | |
947 | rr->ds.algorithm, | |
948 | rr->ds.digest_type, | |
949 | t); | |
950 | if (r < 0) | |
7b50eb2e | 951 | return NULL; |
abf126a3 TG |
952 | break; |
953 | ||
8db0d2f5 | 954 | case DNS_TYPE_SSHFP: |
549c1a25 | 955 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); |
8db0d2f5 | 956 | if (!t) |
7b50eb2e | 957 | return NULL; |
42cc2eeb LP |
958 | |
959 | r = asprintf(&s, "%s %u %u %s", | |
960 | k, | |
961 | rr->sshfp.algorithm, | |
962 | rr->sshfp.fptype, | |
8db0d2f5 | 963 | t); |
42cc2eeb | 964 | if (r < 0) |
7b50eb2e | 965 | return NULL; |
42cc2eeb | 966 | break; |
42cc2eeb | 967 | |
ff3d6560 | 968 | case DNS_TYPE_DNSKEY: { |
8e54f5d9 | 969 | _cleanup_free_ char *alg = NULL; |
99e5ca6d ZJS |
970 | char *ss; |
971 | int n, n1; | |
fc8eec10 ZJS |
972 | uint16_t key_tag; |
973 | ||
974 | key_tag = dnssec_keytag(rr, true); | |
ff3d6560 | 975 | |
8e54f5d9 LP |
976 | r = dnssec_algorithm_to_string_alloc(rr->dnskey.algorithm, &alg); |
977 | if (r < 0) | |
978 | return NULL; | |
ff3d6560 | 979 | |
99e5ca6d | 980 | r = asprintf(&s, "%s %n%u %u %s %n", |
8db0d2f5 | 981 | k, |
99e5ca6d | 982 | &n1, |
f91dc240 LP |
983 | rr->dnskey.flags, |
984 | rr->dnskey.protocol, | |
8e54f5d9 | 985 | alg, |
d7671a3e | 986 | &n); |
8db0d2f5 | 987 | if (r < 0) |
7b50eb2e | 988 | return NULL; |
d7671a3e ZJS |
989 | |
990 | r = base64_append(&s, n, | |
991 | rr->dnskey.key, rr->dnskey.key_size, | |
992 | 8, columns()); | |
993 | if (r < 0) | |
994 | return NULL; | |
995 | ||
99e5ca6d | 996 | r = asprintf(&ss, "%s\n" |
fc8eec10 ZJS |
997 | "%*s-- Flags:%s%s%s\n" |
998 | "%*s-- Key tag: %u", | |
99e5ca6d ZJS |
999 | s, |
1000 | n1, "", | |
1001 | rr->dnskey.flags & DNSKEY_FLAG_SEP ? " SEP" : "", | |
1002 | rr->dnskey.flags & DNSKEY_FLAG_REVOKE ? " REVOKE" : "", | |
fc8eec10 ZJS |
1003 | rr->dnskey.flags & DNSKEY_FLAG_ZONE_KEY ? " ZONE_KEY" : "", |
1004 | n1, "", | |
1005 | key_tag); | |
99e5ca6d ZJS |
1006 | if (r < 0) |
1007 | return NULL; | |
1008 | free(s); | |
1009 | s = ss; | |
1010 | ||
8db0d2f5 | 1011 | break; |
ff3d6560 | 1012 | } |
2d4c5cbc | 1013 | |
151226ab | 1014 | case DNS_TYPE_RRSIG: { |
8e54f5d9 | 1015 | _cleanup_free_ char *alg = NULL; |
7c6423e1 | 1016 | char expiration[strlen("YYYYMMDDHHmmSS") + 1], inception[strlen("YYYYMMDDHHmmSS") + 1]; |
8e54f5d9 | 1017 | const char *type; |
d7671a3e | 1018 | int n; |
151226ab ZJS |
1019 | |
1020 | type = dns_type_to_string(rr->rrsig.type_covered); | |
8e54f5d9 LP |
1021 | |
1022 | r = dnssec_algorithm_to_string_alloc(rr->rrsig.algorithm, &alg); | |
1023 | if (r < 0) | |
1024 | return NULL; | |
151226ab | 1025 | |
7c6423e1 TG |
1026 | r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration); |
1027 | if (r < 0) | |
7b50eb2e | 1028 | return NULL; |
7c6423e1 TG |
1029 | |
1030 | r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception); | |
1031 | if (r < 0) | |
7b50eb2e | 1032 | return NULL; |
7c6423e1 | 1033 | |
151226ab ZJS |
1034 | /* TYPE?? follows |
1035 | * http://tools.ietf.org/html/rfc3597#section-5 */ | |
1036 | ||
d7671a3e | 1037 | r = asprintf(&s, "%s %s%.*u %s %u %u %s %s %u %s %n", |
151226ab ZJS |
1038 | k, |
1039 | type ?: "TYPE", | |
1040 | type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, | |
8e54f5d9 | 1041 | alg, |
151226ab ZJS |
1042 | rr->rrsig.labels, |
1043 | rr->rrsig.original_ttl, | |
7c6423e1 TG |
1044 | expiration, |
1045 | inception, | |
151226ab ZJS |
1046 | rr->rrsig.key_tag, |
1047 | rr->rrsig.signer, | |
d7671a3e | 1048 | &n); |
151226ab | 1049 | if (r < 0) |
7b50eb2e | 1050 | return NULL; |
d7671a3e ZJS |
1051 | |
1052 | r = base64_append(&s, n, | |
1053 | rr->rrsig.signature, rr->rrsig.signature_size, | |
1054 | 8, columns()); | |
1055 | if (r < 0) | |
1056 | return NULL; | |
1057 | ||
151226ab ZJS |
1058 | break; |
1059 | } | |
1060 | ||
50f1e641 TG |
1061 | case DNS_TYPE_NSEC: |
1062 | t = format_types(rr->nsec.types); | |
1063 | if (!t) | |
7b50eb2e | 1064 | return NULL; |
50f1e641 TG |
1065 | |
1066 | r = asprintf(&s, "%s %s %s", | |
1067 | k, | |
1068 | rr->nsec.next_domain_name, | |
1069 | t); | |
1070 | if (r < 0) | |
7b50eb2e | 1071 | return NULL; |
50f1e641 TG |
1072 | break; |
1073 | ||
5d45a880 TG |
1074 | case DNS_TYPE_NSEC3: { |
1075 | _cleanup_free_ char *salt = NULL, *hash = NULL; | |
1076 | ||
f5430a3e | 1077 | if (rr->nsec3.salt_size > 0) { |
5d45a880 TG |
1078 | salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size); |
1079 | if (!salt) | |
7b50eb2e | 1080 | return NULL; |
5d45a880 TG |
1081 | } |
1082 | ||
1083 | hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false); | |
1084 | if (!hash) | |
7b50eb2e | 1085 | return NULL; |
5d45a880 TG |
1086 | |
1087 | t = format_types(rr->nsec3.types); | |
1088 | if (!t) | |
7b50eb2e | 1089 | return NULL; |
5d45a880 TG |
1090 | |
1091 | r = asprintf(&s, "%s %"PRIu8" %"PRIu8" %"PRIu16" %s %s %s", | |
1092 | k, | |
1093 | rr->nsec3.algorithm, | |
1094 | rr->nsec3.flags, | |
1095 | rr->nsec3.iterations, | |
f5430a3e | 1096 | rr->nsec3.salt_size > 0 ? salt : "-", |
5d45a880 TG |
1097 | hash, |
1098 | t); | |
1099 | if (r < 0) | |
7b50eb2e | 1100 | return NULL; |
5d45a880 TG |
1101 | |
1102 | break; | |
1103 | } | |
1104 | ||
48d45d2b | 1105 | case DNS_TYPE_TLSA: { |
cfb90da3 ZJS |
1106 | const char *cert_usage, *selector, *matching_type; |
1107 | char *ss; | |
48d45d2b ZJS |
1108 | int n; |
1109 | ||
cfb90da3 ZJS |
1110 | cert_usage = tlsa_cert_usage_to_string(rr->tlsa.cert_usage); |
1111 | selector = tlsa_selector_to_string(rr->tlsa.selector); | |
1112 | matching_type = tlsa_matching_type_to_string(rr->tlsa.matching_type); | |
1113 | ||
48d45d2b ZJS |
1114 | r = asprintf(&s, "%s %u %u %u %n", |
1115 | k, | |
1116 | rr->tlsa.cert_usage, | |
1117 | rr->tlsa.selector, | |
1118 | rr->tlsa.matching_type, | |
1119 | &n); | |
1120 | if (r < 0) | |
1121 | return NULL; | |
1122 | ||
1123 | r = base64_append(&s, n, | |
1124 | rr->tlsa.data, rr->tlsa.data_size, | |
1125 | 8, columns()); | |
1126 | if (r < 0) | |
1127 | return NULL; | |
cfb90da3 ZJS |
1128 | |
1129 | r = asprintf(&ss, "%s\n" | |
1130 | "%*s-- Cert. usage: %s\n" | |
1131 | "%*s-- Selector: %s\n" | |
1132 | "%*s-- Matching type: %s", | |
1133 | s, | |
1134 | n - 6, "", cert_usage, | |
1135 | n - 6, "", selector, | |
1136 | n - 6, "", matching_type); | |
1137 | if (r < 0) | |
1138 | return NULL; | |
1139 | free(s); | |
1140 | s = ss; | |
1141 | ||
48d45d2b ZJS |
1142 | break; |
1143 | } | |
1144 | ||
d93a16b8 ZJS |
1145 | case DNS_TYPE_OPENPGPKEY: { |
1146 | int n; | |
1147 | ||
1148 | r = asprintf(&s, "%s %n", | |
1149 | k, | |
1150 | &n); | |
1151 | if (r < 0) | |
1152 | return NULL; | |
1153 | ||
1154 | r = base64_append(&s, n, | |
a43a068a | 1155 | rr->generic.data, rr->generic.data_size, |
d93a16b8 ZJS |
1156 | 8, columns()); |
1157 | if (r < 0) | |
1158 | return NULL; | |
1159 | break; | |
1160 | } | |
1161 | ||
8db0d2f5 | 1162 | default: |
a43a068a | 1163 | t = hexmem(rr->generic.data, rr->generic.data_size); |
8db0d2f5 | 1164 | if (!t) |
7b50eb2e | 1165 | return NULL; |
8db0d2f5 | 1166 | |
6af47493 | 1167 | /* Format as documented in RFC 3597, Section 5 */ |
a43a068a | 1168 | r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.data_size, t); |
d23a27a9 | 1169 | if (r < 0) |
7b50eb2e | 1170 | return NULL; |
2d4c5cbc | 1171 | break; |
8db0d2f5 | 1172 | } |
2d4c5cbc | 1173 | |
7b50eb2e LP |
1174 | rr->to_string = s; |
1175 | return s; | |
2d4c5cbc | 1176 | } |
322345fd | 1177 | |
a8812dd7 LP |
1178 | int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical) { |
1179 | ||
1180 | DnsPacket packet = { | |
1181 | .n_ref = 1, | |
1182 | .protocol = DNS_PROTOCOL_DNS, | |
1183 | .on_stack = true, | |
1184 | .refuse_compression = true, | |
1185 | .canonical_form = canonical, | |
1186 | }; | |
1187 | ||
1188 | size_t start, rds; | |
1189 | int r; | |
1190 | ||
1191 | assert(rr); | |
1192 | ||
1193 | /* Generates the RR in wire-format, optionally in the | |
1194 | * canonical form as discussed in the DNSSEC RFC 4034, Section | |
1195 | * 6.2. We allocate a throw-away DnsPacket object on the stack | |
1196 | * here, because we need some book-keeping for memory | |
1197 | * management, and can reuse the DnsPacket serializer, that | |
1198 | * can generate the canonical form, too, but also knows label | |
1199 | * compression and suchlike. */ | |
1200 | ||
1201 | if (rr->wire_format && rr->wire_format_canonical == canonical) | |
1202 | return 0; | |
1203 | ||
1204 | r = dns_packet_append_rr(&packet, rr, &start, &rds); | |
1205 | if (r < 0) | |
1206 | return r; | |
1207 | ||
1208 | assert(start == 0); | |
1209 | assert(packet._data); | |
1210 | ||
1211 | free(rr->wire_format); | |
1212 | rr->wire_format = packet._data; | |
1213 | rr->wire_format_size = packet.size; | |
1214 | rr->wire_format_rdata_offset = rds; | |
1215 | rr->wire_format_canonical = canonical; | |
1216 | ||
1217 | packet._data = NULL; | |
1218 | dns_packet_unref(&packet); | |
1219 | ||
1220 | return 0; | |
1221 | } | |
1222 | ||
97c67192 LP |
1223 | int dns_resource_record_signer(DnsResourceRecord *rr, const char **ret) { |
1224 | const char *n; | |
1225 | int r; | |
1226 | ||
1227 | assert(rr); | |
1228 | assert(ret); | |
1229 | ||
1230 | /* Returns the RRset's signer, if it is known. */ | |
1231 | ||
1232 | if (rr->n_skip_labels_signer == (unsigned) -1) | |
1233 | return -ENODATA; | |
1234 | ||
1235 | n = DNS_RESOURCE_KEY_NAME(rr->key); | |
1236 | r = dns_name_skip(n, rr->n_skip_labels_signer, &n); | |
1237 | if (r < 0) | |
1238 | return r; | |
1239 | if (r == 0) | |
1240 | return -EINVAL; | |
1241 | ||
1242 | *ret = n; | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | int dns_resource_record_source(DnsResourceRecord *rr, const char **ret) { | |
1247 | const char *n; | |
1248 | int r; | |
1249 | ||
1250 | assert(rr); | |
1251 | assert(ret); | |
1252 | ||
1253 | /* Returns the RRset's synthesizing source, if it is known. */ | |
1254 | ||
1255 | if (rr->n_skip_labels_source == (unsigned) -1) | |
1256 | return -ENODATA; | |
1257 | ||
1258 | n = DNS_RESOURCE_KEY_NAME(rr->key); | |
1259 | r = dns_name_skip(n, rr->n_skip_labels_source, &n); | |
1260 | if (r < 0) | |
1261 | return r; | |
1262 | if (r == 0) | |
1263 | return -EINVAL; | |
1264 | ||
1265 | *ret = n; | |
1266 | return 0; | |
1267 | } | |
1268 | ||
1269 | int dns_resource_record_is_signer(DnsResourceRecord *rr, const char *zone) { | |
1270 | const char *signer; | |
1271 | int r; | |
1272 | ||
ab481675 LP |
1273 | assert(rr); |
1274 | ||
97c67192 LP |
1275 | r = dns_resource_record_signer(rr, &signer); |
1276 | if (r < 0) | |
1277 | return r; | |
1278 | ||
1279 | return dns_name_equal(zone, signer); | |
1280 | } | |
1281 | ||
ab481675 LP |
1282 | int dns_resource_record_is_synthetic(DnsResourceRecord *rr) { |
1283 | int r; | |
1284 | ||
1285 | assert(rr); | |
1286 | ||
1287 | /* Returns > 0 if the RR is generated from a wildcard, and is not the asterisk name itself */ | |
1288 | ||
1289 | if (rr->n_skip_labels_source == (unsigned) -1) | |
1290 | return -ENODATA; | |
1291 | ||
1292 | if (rr->n_skip_labels_source == 0) | |
1293 | return 0; | |
1294 | ||
1295 | if (rr->n_skip_labels_source > 1) | |
1296 | return 1; | |
1297 | ||
1298 | r = dns_name_startswith(DNS_RESOURCE_KEY_NAME(rr->key), "*"); | |
1299 | if (r < 0) | |
1300 | return r; | |
1301 | ||
1302 | return !r; | |
1303 | } | |
1304 | ||
6d99904f | 1305 | void dns_resource_record_hash_func(const void *i, struct siphash *state) { |
c9c72065 LP |
1306 | const DnsResourceRecord *rr = i; |
1307 | ||
1308 | assert(rr); | |
1309 | ||
1310 | dns_resource_key_hash_func(rr->key, state); | |
1311 | ||
1312 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { | |
1313 | ||
1314 | case DNS_TYPE_SRV: | |
1315 | siphash24_compress(&rr->srv.priority, sizeof(rr->srv.priority), state); | |
1316 | siphash24_compress(&rr->srv.weight, sizeof(rr->srv.weight), state); | |
1317 | siphash24_compress(&rr->srv.port, sizeof(rr->srv.port), state); | |
1318 | dns_name_hash_func(rr->srv.name, state); | |
1319 | break; | |
1320 | ||
1321 | case DNS_TYPE_PTR: | |
1322 | case DNS_TYPE_NS: | |
1323 | case DNS_TYPE_CNAME: | |
1324 | case DNS_TYPE_DNAME: | |
1325 | dns_name_hash_func(rr->ptr.name, state); | |
1326 | break; | |
1327 | ||
1328 | case DNS_TYPE_HINFO: | |
1329 | string_hash_func(rr->hinfo.cpu, state); | |
1330 | string_hash_func(rr->hinfo.os, state); | |
1331 | break; | |
1332 | ||
1333 | case DNS_TYPE_TXT: | |
1334 | case DNS_TYPE_SPF: { | |
1335 | DnsTxtItem *j; | |
1336 | ||
1337 | LIST_FOREACH(items, j, rr->txt.items) { | |
1338 | siphash24_compress(j->data, j->length, state); | |
1339 | ||
d5115566 LP |
1340 | /* Add an extra NUL byte, so that "a" followed by "b" doesn't result in the same hash as "ab" |
1341 | * followed by "". */ | |
1342 | siphash24_compress_byte(0, state); | |
c9c72065 LP |
1343 | } |
1344 | break; | |
1345 | } | |
1346 | ||
1347 | case DNS_TYPE_A: | |
1348 | siphash24_compress(&rr->a.in_addr, sizeof(rr->a.in_addr), state); | |
1349 | break; | |
1350 | ||
1351 | case DNS_TYPE_AAAA: | |
1352 | siphash24_compress(&rr->aaaa.in6_addr, sizeof(rr->aaaa.in6_addr), state); | |
1353 | break; | |
1354 | ||
1355 | case DNS_TYPE_SOA: | |
1356 | dns_name_hash_func(rr->soa.mname, state); | |
1357 | dns_name_hash_func(rr->soa.rname, state); | |
1358 | siphash24_compress(&rr->soa.serial, sizeof(rr->soa.serial), state); | |
1359 | siphash24_compress(&rr->soa.refresh, sizeof(rr->soa.refresh), state); | |
1360 | siphash24_compress(&rr->soa.retry, sizeof(rr->soa.retry), state); | |
1361 | siphash24_compress(&rr->soa.expire, sizeof(rr->soa.expire), state); | |
1362 | siphash24_compress(&rr->soa.minimum, sizeof(rr->soa.minimum), state); | |
1363 | break; | |
1364 | ||
1365 | case DNS_TYPE_MX: | |
1366 | siphash24_compress(&rr->mx.priority, sizeof(rr->mx.priority), state); | |
1367 | dns_name_hash_func(rr->mx.exchange, state); | |
1368 | break; | |
1369 | ||
1370 | case DNS_TYPE_LOC: | |
1371 | siphash24_compress(&rr->loc.version, sizeof(rr->loc.version), state); | |
1372 | siphash24_compress(&rr->loc.size, sizeof(rr->loc.size), state); | |
1373 | siphash24_compress(&rr->loc.horiz_pre, sizeof(rr->loc.horiz_pre), state); | |
1374 | siphash24_compress(&rr->loc.vert_pre, sizeof(rr->loc.vert_pre), state); | |
1375 | siphash24_compress(&rr->loc.latitude, sizeof(rr->loc.latitude), state); | |
1376 | siphash24_compress(&rr->loc.longitude, sizeof(rr->loc.longitude), state); | |
1377 | siphash24_compress(&rr->loc.altitude, sizeof(rr->loc.altitude), state); | |
1378 | break; | |
1379 | ||
1380 | case DNS_TYPE_SSHFP: | |
1381 | siphash24_compress(&rr->sshfp.algorithm, sizeof(rr->sshfp.algorithm), state); | |
1382 | siphash24_compress(&rr->sshfp.fptype, sizeof(rr->sshfp.fptype), state); | |
1383 | siphash24_compress(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size, state); | |
1384 | break; | |
1385 | ||
1386 | case DNS_TYPE_DNSKEY: | |
1387 | siphash24_compress(&rr->dnskey.flags, sizeof(rr->dnskey.flags), state); | |
1388 | siphash24_compress(&rr->dnskey.protocol, sizeof(rr->dnskey.protocol), state); | |
1389 | siphash24_compress(&rr->dnskey.algorithm, sizeof(rr->dnskey.algorithm), state); | |
1390 | siphash24_compress(rr->dnskey.key, rr->dnskey.key_size, state); | |
1391 | break; | |
1392 | ||
1393 | case DNS_TYPE_RRSIG: | |
1394 | siphash24_compress(&rr->rrsig.type_covered, sizeof(rr->rrsig.type_covered), state); | |
1395 | siphash24_compress(&rr->rrsig.algorithm, sizeof(rr->rrsig.algorithm), state); | |
1396 | siphash24_compress(&rr->rrsig.labels, sizeof(rr->rrsig.labels), state); | |
1397 | siphash24_compress(&rr->rrsig.original_ttl, sizeof(rr->rrsig.original_ttl), state); | |
1398 | siphash24_compress(&rr->rrsig.expiration, sizeof(rr->rrsig.expiration), state); | |
1399 | siphash24_compress(&rr->rrsig.inception, sizeof(rr->rrsig.inception), state); | |
1400 | siphash24_compress(&rr->rrsig.key_tag, sizeof(rr->rrsig.key_tag), state); | |
1401 | dns_name_hash_func(rr->rrsig.signer, state); | |
1402 | siphash24_compress(rr->rrsig.signature, rr->rrsig.signature_size, state); | |
1403 | break; | |
1404 | ||
1405 | case DNS_TYPE_NSEC: | |
1406 | dns_name_hash_func(rr->nsec.next_domain_name, state); | |
1407 | /* FIXME: we leave out the type bitmap here. Hash | |
1408 | * would be better if we'd take it into account | |
1409 | * too. */ | |
1410 | break; | |
1411 | ||
1412 | case DNS_TYPE_DS: | |
1413 | siphash24_compress(&rr->ds.key_tag, sizeof(rr->ds.key_tag), state); | |
1414 | siphash24_compress(&rr->ds.algorithm, sizeof(rr->ds.algorithm), state); | |
1415 | siphash24_compress(&rr->ds.digest_type, sizeof(rr->ds.digest_type), state); | |
1416 | siphash24_compress(rr->ds.digest, rr->ds.digest_size, state); | |
1417 | break; | |
1418 | ||
1419 | case DNS_TYPE_NSEC3: | |
1420 | siphash24_compress(&rr->nsec3.algorithm, sizeof(rr->nsec3.algorithm), state); | |
1421 | siphash24_compress(&rr->nsec3.flags, sizeof(rr->nsec3.flags), state); | |
1422 | siphash24_compress(&rr->nsec3.iterations, sizeof(rr->nsec3.iterations), state); | |
1423 | siphash24_compress(rr->nsec3.salt, rr->nsec3.salt_size, state); | |
1424 | siphash24_compress(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, state); | |
1425 | /* FIXME: We leave the bitmaps out */ | |
1426 | break; | |
48d45d2b ZJS |
1427 | |
1428 | case DNS_TYPE_TLSA: | |
1429 | siphash24_compress(&rr->tlsa.cert_usage, sizeof(rr->tlsa.cert_usage), state); | |
1430 | siphash24_compress(&rr->tlsa.selector, sizeof(rr->tlsa.selector), state); | |
1431 | siphash24_compress(&rr->tlsa.matching_type, sizeof(rr->tlsa.matching_type), state); | |
1432 | siphash24_compress(&rr->tlsa.data, rr->tlsa.data_size, state); | |
1433 | break; | |
c9c72065 | 1434 | |
d93a16b8 | 1435 | case DNS_TYPE_OPENPGPKEY: |
c9c72065 | 1436 | default: |
a43a068a | 1437 | siphash24_compress(rr->generic.data, rr->generic.data_size, state); |
c9c72065 LP |
1438 | break; |
1439 | } | |
1440 | } | |
1441 | ||
1442 | static int dns_resource_record_compare_func(const void *a, const void *b) { | |
1443 | const DnsResourceRecord *x = a, *y = b; | |
1444 | int ret; | |
1445 | ||
1446 | ret = dns_resource_key_compare_func(x->key, y->key); | |
1447 | if (ret != 0) | |
1448 | return ret; | |
1449 | ||
1450 | if (dns_resource_record_equal(x, y)) | |
1451 | return 0; | |
1452 | ||
1453 | /* This is a bit dirty, we don't implement proper odering, but | |
1454 | * the hashtable doesn't need ordering anyway, hence we don't | |
1455 | * care. */ | |
1456 | return x < y ? -1 : 1; | |
1457 | } | |
1458 | ||
1459 | const struct hash_ops dns_resource_record_hash_ops = { | |
1460 | .hash = dns_resource_record_hash_func, | |
1461 | .compare = dns_resource_record_compare_func, | |
1462 | }; | |
1463 | ||
2001c805 LP |
1464 | DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i) { |
1465 | DnsTxtItem *n; | |
1466 | ||
1467 | if (!i) | |
1468 | return NULL; | |
1469 | ||
1470 | n = i->items_next; | |
1471 | ||
1472 | free(i); | |
1473 | return dns_txt_item_free_all(n); | |
1474 | } | |
1475 | ||
1476 | bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) { | |
1477 | ||
4d247a6c LP |
1478 | if (a == b) |
1479 | return true; | |
1480 | ||
2001c805 LP |
1481 | if (!a != !b) |
1482 | return false; | |
1483 | ||
1484 | if (!a) | |
1485 | return true; | |
1486 | ||
1487 | if (a->length != b->length) | |
1488 | return false; | |
1489 | ||
1490 | if (memcmp(a->data, b->data, a->length) != 0) | |
1491 | return false; | |
1492 | ||
1493 | return dns_txt_item_equal(a->items_next, b->items_next); | |
1494 | } | |
8730bccf LP |
1495 | |
1496 | static const char* const dnssec_algorithm_table[_DNSSEC_ALGORITHM_MAX_DEFINED] = { | |
6f717d08 | 1497 | /* Mnemonics as listed on https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */ |
8730bccf LP |
1498 | [DNSSEC_ALGORITHM_RSAMD5] = "RSAMD5", |
1499 | [DNSSEC_ALGORITHM_DH] = "DH", | |
1500 | [DNSSEC_ALGORITHM_DSA] = "DSA", | |
1501 | [DNSSEC_ALGORITHM_ECC] = "ECC", | |
1502 | [DNSSEC_ALGORITHM_RSASHA1] = "RSASHA1", | |
1503 | [DNSSEC_ALGORITHM_DSA_NSEC3_SHA1] = "DSA-NSEC3-SHA1", | |
1504 | [DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1] = "RSASHA1-NSEC3-SHA1", | |
1505 | [DNSSEC_ALGORITHM_RSASHA256] = "RSASHA256", | |
1506 | [DNSSEC_ALGORITHM_RSASHA512] = "RSASHA512", | |
6f717d08 LP |
1507 | [DNSSEC_ALGORITHM_ECC_GOST] = "ECC-GOST", |
1508 | [DNSSEC_ALGORITHM_ECDSAP256SHA256] = "ECDSAP256SHA256", | |
1509 | [DNSSEC_ALGORITHM_ECDSAP384SHA384] = "ECDSAP384SHA384", | |
8730bccf LP |
1510 | [DNSSEC_ALGORITHM_INDIRECT] = "INDIRECT", |
1511 | [DNSSEC_ALGORITHM_PRIVATEDNS] = "PRIVATEDNS", | |
1512 | [DNSSEC_ALGORITHM_PRIVATEOID] = "PRIVATEOID", | |
1513 | }; | |
8e54f5d9 | 1514 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_algorithm, int, 255); |
8730bccf LP |
1515 | |
1516 | static const char* const dnssec_digest_table[_DNSSEC_DIGEST_MAX_DEFINED] = { | |
6f717d08 LP |
1517 | /* Names as listed on https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml */ |
1518 | [DNSSEC_DIGEST_SHA1] = "SHA-1", | |
1519 | [DNSSEC_DIGEST_SHA256] = "SHA-256", | |
1520 | [DNSSEC_DIGEST_GOST_R_34_11_94] = "GOST_R_34.11-94", | |
1521 | [DNSSEC_DIGEST_SHA384] = "SHA-384", | |
8730bccf | 1522 | }; |
8e54f5d9 | 1523 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_digest, int, 255); |