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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
74b2466e | 2 | |
0dae31d4 ZJS |
3 | #include <math.h> |
4 | ||
b5efdb8a | 5 | #include "alloc-util.h" |
4ad7f276 | 6 | #include "dns-domain.h" |
7263f724 | 7 | #include "dns-type.h" |
95052df3 | 8 | #include "escape.h" |
e4e73a63 | 9 | #include "hexdecoct.h" |
9bd2422a | 10 | #include "memory-util.h" |
fc8eec10 | 11 | #include "resolved-dns-dnssec.h" |
07630cea | 12 | #include "resolved-dns-packet.h" |
e4e73a63 | 13 | #include "resolved-dns-rr.h" |
8730bccf | 14 | #include "string-table.h" |
07630cea LP |
15 | #include "string-util.h" |
16 | #include "strv.h" | |
d7671a3e | 17 | #include "terminal-util.h" |
74b2466e | 18 | |
faa133f3 LP |
19 | DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) { |
20 | DnsResourceKey *k; | |
21 | size_t l; | |
74b2466e | 22 | |
faa133f3 LP |
23 | assert(name); |
24 | ||
25 | l = strlen(name); | |
26 | k = malloc0(sizeof(DnsResourceKey) + l + 1); | |
27 | if (!k) | |
28 | return NULL; | |
29 | ||
30 | k->n_ref = 1; | |
31 | k->class = class; | |
32 | k->type = type; | |
33 | ||
34 | strcpy((char*) k + sizeof(DnsResourceKey), name); | |
35 | ||
36 | return k; | |
37 | } | |
38 | ||
36d9205d | 39 | DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname) { |
58db254a LP |
40 | int r; |
41 | ||
36d9205d TG |
42 | assert(key); |
43 | assert(cname); | |
44 | ||
58db254a LP |
45 | assert(IN_SET(cname->key->type, DNS_TYPE_CNAME, DNS_TYPE_DNAME)); |
46 | ||
47 | if (cname->key->type == DNS_TYPE_CNAME) | |
48 | return dns_resource_key_new(key->class, key->type, cname->cname.name); | |
49 | else { | |
50 | DnsResourceKey *k; | |
51 | char *destination = NULL; | |
52 | ||
1c02e7ba | 53 | r = dns_name_change_suffix(dns_resource_key_name(key), dns_resource_key_name(cname->key), cname->dname.name, &destination); |
58db254a LP |
54 | if (r < 0) |
55 | return NULL; | |
56 | if (r == 0) | |
57 | return dns_resource_key_ref((DnsResourceKey*) key); | |
58 | ||
59 | k = dns_resource_key_new_consume(key->class, key->type, destination); | |
6b430fdb ZJS |
60 | if (!k) |
61 | return mfree(destination); | |
58db254a LP |
62 | |
63 | return k; | |
64 | } | |
36d9205d TG |
65 | } |
66 | ||
801ad6a6 LP |
67 | int dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name) { |
68 | DnsResourceKey *new_key; | |
69 | char *joined; | |
70 | int r; | |
71 | ||
72 | assert(ret); | |
73 | assert(key); | |
74 | assert(name); | |
75 | ||
dc477e73 | 76 | if (dns_name_is_root(name)) { |
801ad6a6 LP |
77 | *ret = dns_resource_key_ref(key); |
78 | return 0; | |
79 | } | |
80 | ||
7470cc4c | 81 | r = dns_name_concat(dns_resource_key_name(key), name, 0, &joined); |
801ad6a6 LP |
82 | if (r < 0) |
83 | return r; | |
84 | ||
85 | new_key = dns_resource_key_new_consume(key->class, key->type, joined); | |
86 | if (!new_key) { | |
87 | free(joined); | |
88 | return -ENOMEM; | |
89 | } | |
90 | ||
91 | *ret = new_key; | |
92 | return 0; | |
93 | } | |
94 | ||
faa133f3 LP |
95 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) { |
96 | DnsResourceKey *k; | |
97 | ||
98 | assert(name); | |
99 | ||
1ed31408 | 100 | k = new(DnsResourceKey, 1); |
faa133f3 LP |
101 | if (!k) |
102 | return NULL; | |
103 | ||
1ed31408 LP |
104 | *k = (DnsResourceKey) { |
105 | .n_ref = 1, | |
106 | .class = class, | |
107 | .type = type, | |
108 | ._name = name, | |
109 | }; | |
faa133f3 LP |
110 | |
111 | return k; | |
112 | } | |
113 | ||
114 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) { | |
115 | ||
116 | if (!k) | |
117 | return NULL; | |
118 | ||
1b4f6e79 LP |
119 | /* Static/const keys created with DNS_RESOURCE_KEY_CONST will |
120 | * set this to -1, they should not be reffed/unreffed */ | |
121 | assert(k->n_ref != (unsigned) -1); | |
122 | ||
faa133f3 LP |
123 | assert(k->n_ref > 0); |
124 | k->n_ref++; | |
125 | ||
126 | return k; | |
127 | } | |
128 | ||
129 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) { | |
130 | if (!k) | |
131 | return NULL; | |
132 | ||
1b4f6e79 | 133 | assert(k->n_ref != (unsigned) -1); |
faa133f3 LP |
134 | assert(k->n_ref > 0); |
135 | ||
136 | if (k->n_ref == 1) { | |
137 | free(k->_name); | |
138 | free(k); | |
139 | } else | |
140 | k->n_ref--; | |
141 | ||
142 | return NULL; | |
143 | } | |
144 | ||
1c02e7ba ZJS |
145 | const char* dns_resource_key_name(const DnsResourceKey *key) { |
146 | const char *name; | |
147 | ||
148 | if (!key) | |
149 | return NULL; | |
150 | ||
151 | if (key->_name) | |
152 | name = key->_name; | |
153 | else | |
154 | name = (char*) key + sizeof(DnsResourceKey); | |
155 | ||
156 | if (dns_name_is_root(name)) | |
157 | return "."; | |
158 | else | |
159 | return name; | |
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 | ||
a2bf8a19 DR |
170 | bool dns_resource_key_is_dnssd_ptr(const DnsResourceKey *key) { |
171 | assert(key); | |
172 | ||
173 | /* Check if this is a PTR resource key used in | |
174 | Service Instance Enumeration as described in RFC6763 p4.1. */ | |
175 | ||
176 | if (key->type != DNS_TYPE_PTR) | |
177 | return false; | |
178 | ||
179 | return dns_name_endswith(dns_resource_key_name(key), "_tcp.local") || | |
180 | dns_name_endswith(dns_resource_key_name(key), "_udp.local"); | |
181 | } | |
182 | ||
faa133f3 LP |
183 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) { |
184 | int r; | |
185 | ||
4d247a6c LP |
186 | if (a == b) |
187 | return 1; | |
188 | ||
1c02e7ba | 189 | r = dns_name_equal(dns_resource_key_name(a), dns_resource_key_name(b)); |
faa133f3 LP |
190 | if (r <= 0) |
191 | return r; | |
192 | ||
193 | if (a->class != b->class) | |
194 | return 0; | |
195 | ||
196 | if (a->type != b->type) | |
197 | return 0; | |
198 | ||
199 | return 1; | |
200 | } | |
201 | ||
105e1512 | 202 | int dns_resource_key_match_rr(const DnsResourceKey *key, DnsResourceRecord *rr, const char *search_domain) { |
801ad6a6 LP |
203 | int r; |
204 | ||
faa133f3 LP |
205 | assert(key); |
206 | assert(rr); | |
207 | ||
4d247a6c LP |
208 | if (key == rr->key) |
209 | return 1; | |
210 | ||
801ad6a6 LP |
211 | /* Checks if an rr matches the specified key. If a search |
212 | * domain is specified, it will also be checked if the key | |
213 | * with the search domain suffixed might match the RR. */ | |
214 | ||
faa133f3 LP |
215 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) |
216 | return 0; | |
217 | ||
218 | if (rr->key->type != key->type && key->type != DNS_TYPE_ANY) | |
219 | return 0; | |
220 | ||
1c02e7ba | 221 | r = dns_name_equal(dns_resource_key_name(rr->key), dns_resource_key_name(key)); |
801ad6a6 LP |
222 | if (r != 0) |
223 | return r; | |
224 | ||
225 | if (search_domain) { | |
226 | _cleanup_free_ char *joined = NULL; | |
227 | ||
7470cc4c | 228 | r = dns_name_concat(dns_resource_key_name(key), search_domain, 0, &joined); |
801ad6a6 LP |
229 | if (r < 0) |
230 | return r; | |
231 | ||
1c02e7ba | 232 | return dns_name_equal(dns_resource_key_name(rr->key), joined); |
801ad6a6 LP |
233 | } |
234 | ||
235 | return 0; | |
faa133f3 LP |
236 | } |
237 | ||
5d27351f | 238 | int dns_resource_key_match_cname_or_dname(const DnsResourceKey *key, const DnsResourceKey *cname, const char *search_domain) { |
801ad6a6 LP |
239 | int r; |
240 | ||
faa133f3 | 241 | assert(key); |
5d27351f | 242 | assert(cname); |
faa133f3 | 243 | |
5d27351f | 244 | if (cname->class != key->class && key->class != DNS_CLASS_ANY) |
faa133f3 LP |
245 | return 0; |
246 | ||
5d27351f | 247 | if (cname->type == DNS_TYPE_CNAME) |
1c02e7ba | 248 | r = dns_name_equal(dns_resource_key_name(key), dns_resource_key_name(cname)); |
5d27351f | 249 | else if (cname->type == DNS_TYPE_DNAME) |
1c02e7ba | 250 | r = dns_name_endswith(dns_resource_key_name(key), dns_resource_key_name(cname)); |
58db254a | 251 | else |
faa133f3 | 252 | return 0; |
801ad6a6 LP |
253 | |
254 | if (r != 0) | |
255 | return r; | |
256 | ||
257 | if (search_domain) { | |
258 | _cleanup_free_ char *joined = NULL; | |
259 | ||
7470cc4c | 260 | r = dns_name_concat(dns_resource_key_name(key), search_domain, 0, &joined); |
801ad6a6 LP |
261 | if (r < 0) |
262 | return r; | |
263 | ||
5d27351f | 264 | if (cname->type == DNS_TYPE_CNAME) |
1c02e7ba | 265 | return dns_name_equal(joined, dns_resource_key_name(cname)); |
5d27351f | 266 | else if (cname->type == DNS_TYPE_DNAME) |
1c02e7ba | 267 | return dns_name_endswith(joined, dns_resource_key_name(cname)); |
801ad6a6 LP |
268 | } |
269 | ||
270 | return 0; | |
547973de LP |
271 | } |
272 | ||
273 | int dns_resource_key_match_soa(const DnsResourceKey *key, const DnsResourceKey *soa) { | |
274 | assert(soa); | |
275 | assert(key); | |
276 | ||
277 | /* Checks whether 'soa' is a SOA record for the specified key. */ | |
278 | ||
65b200e7 | 279 | if (soa->class != key->class) |
547973de | 280 | return 0; |
801ad6a6 | 281 | |
547973de LP |
282 | if (soa->type != DNS_TYPE_SOA) |
283 | return 0; | |
284 | ||
1c02e7ba | 285 | return dns_name_endswith(dns_resource_key_name(key), dns_resource_key_name(soa)); |
74b2466e LP |
286 | } |
287 | ||
7a08d314 | 288 | static void dns_resource_key_hash_func(const DnsResourceKey *k, struct siphash *state) { |
b826ab58 | 289 | assert(k); |
322345fd | 290 | |
1c02e7ba | 291 | dns_name_hash_func(dns_resource_key_name(k), state); |
b826ab58 TG |
292 | siphash24_compress(&k->class, sizeof(k->class), state); |
293 | siphash24_compress(&k->type, sizeof(k->type), state); | |
322345fd LP |
294 | } |
295 | ||
7a08d314 | 296 | static int dns_resource_key_compare_func(const DnsResourceKey *x, const DnsResourceKey *y) { |
60086492 | 297 | int r; |
322345fd | 298 | |
60086492 YW |
299 | r = dns_name_compare_func(dns_resource_key_name(x), dns_resource_key_name(y)); |
300 | if (r != 0) | |
301 | return r; | |
322345fd | 302 | |
60086492 YW |
303 | r = CMP(x->type, y->type); |
304 | if (r != 0) | |
305 | return r; | |
322345fd | 306 | |
60086492 | 307 | return CMP(x->class, y->class); |
322345fd LP |
308 | } |
309 | ||
7a08d314 | 310 | DEFINE_HASH_OPS(dns_resource_key_hash_ops, DnsResourceKey, dns_resource_key_hash_func, dns_resource_key_compare_func); |
d5099efc | 311 | |
202b76ae | 312 | char* dns_resource_key_to_string(const DnsResourceKey *key, char *buf, size_t buf_size) { |
1c02e7ba | 313 | const char *c, *t; |
202b76ae | 314 | char *ans = buf; |
2d4c5cbc | 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 | 319 | c = dns_class_to_string(key->class); |
2d4c5cbc | 320 | t = dns_type_to_string(key->type); |
2d4c5cbc | 321 | |
202b76ae ZJS |
322 | snprintf(buf, buf_size, "%s %s%s%.0u %s%s%.0u", |
323 | dns_resource_key_name(key), | |
87e4e28d | 324 | strempty(c), c ? "" : "CLASS", c ? 0 : key->class, |
d149a404 | 325 | strempty(t), t ? "" : "TYPE", t ? 0 : key->type); |
2d4c5cbc | 326 | |
202b76ae | 327 | return ans; |
2d4c5cbc LP |
328 | } |
329 | ||
f57e3cd5 LP |
330 | bool dns_resource_key_reduce(DnsResourceKey **a, DnsResourceKey **b) { |
331 | assert(a); | |
332 | assert(b); | |
333 | ||
334 | /* Try to replace one RR key by another if they are identical, thus saving a bit of memory. Note that we do | |
335 | * this only for RR keys, not for RRs themselves, as they carry a lot of additional metadata (where they come | |
336 | * from, validity data, and suchlike), and cannot be replaced so easily by other RRs that have the same | |
337 | * superficial data. */ | |
338 | ||
339 | if (!*a) | |
340 | return false; | |
341 | if (!*b) | |
342 | return false; | |
343 | ||
344 | /* We refuse merging const keys */ | |
345 | if ((*a)->n_ref == (unsigned) -1) | |
346 | return false; | |
347 | if ((*b)->n_ref == (unsigned) -1) | |
348 | return false; | |
349 | ||
350 | /* Already the same? */ | |
351 | if (*a == *b) | |
352 | return true; | |
353 | ||
354 | /* Are they really identical? */ | |
355 | if (dns_resource_key_equal(*a, *b) <= 0) | |
356 | return false; | |
357 | ||
358 | /* Keep the one which already has more references. */ | |
359 | if ((*a)->n_ref > (*b)->n_ref) { | |
360 | dns_resource_key_unref(*b); | |
361 | *b = dns_resource_key_ref(*a); | |
362 | } else { | |
363 | dns_resource_key_unref(*a); | |
364 | *a = dns_resource_key_ref(*b); | |
365 | } | |
366 | ||
367 | return true; | |
368 | } | |
369 | ||
faa133f3 | 370 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { |
74b2466e LP |
371 | DnsResourceRecord *rr; |
372 | ||
1ed31408 | 373 | rr = new(DnsResourceRecord, 1); |
74b2466e LP |
374 | if (!rr) |
375 | return NULL; | |
376 | ||
1ed31408 LP |
377 | *rr = (DnsResourceRecord) { |
378 | .n_ref = 1, | |
379 | .key = dns_resource_key_ref(key), | |
380 | .expiry = USEC_INFINITY, | |
381 | .n_skip_labels_signer = (unsigned) -1, | |
382 | .n_skip_labels_source = (unsigned) -1, | |
383 | }; | |
faa133f3 | 384 | |
74b2466e LP |
385 | return rr; |
386 | } | |
387 | ||
8bf52d3d LP |
388 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) { |
389 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
390 | ||
391 | key = dns_resource_key_new(class, type, name); | |
392 | if (!key) | |
393 | return NULL; | |
394 | ||
395 | return dns_resource_record_new(key); | |
396 | } | |
397 | ||
8301aa0b YW |
398 | static DnsResourceRecord* dns_resource_record_free(DnsResourceRecord *rr) { |
399 | assert(rr); | |
74b2466e | 400 | |
faa133f3 | 401 | if (rr->key) { |
9de3e329 | 402 | switch(rr->key->type) { |
9c92ce6d LP |
403 | |
404 | case DNS_TYPE_SRV: | |
405 | free(rr->srv.name); | |
406 | break; | |
407 | ||
9de3e329 ZJS |
408 | case DNS_TYPE_PTR: |
409 | case DNS_TYPE_NS: | |
410 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 411 | case DNS_TYPE_DNAME: |
faa133f3 | 412 | free(rr->ptr.name); |
9de3e329 | 413 | break; |
9c92ce6d | 414 | |
9de3e329 | 415 | case DNS_TYPE_HINFO: |
faa133f3 LP |
416 | free(rr->hinfo.cpu); |
417 | free(rr->hinfo.os); | |
9de3e329 | 418 | break; |
9c92ce6d | 419 | |
9de3e329 | 420 | case DNS_TYPE_TXT: |
9c92ce6d | 421 | case DNS_TYPE_SPF: |
2001c805 | 422 | dns_txt_item_free_all(rr->txt.items); |
9de3e329 | 423 | break; |
9c92ce6d | 424 | |
9de3e329 | 425 | case DNS_TYPE_SOA: |
7e8e0422 LP |
426 | free(rr->soa.mname); |
427 | free(rr->soa.rname); | |
9de3e329 | 428 | break; |
9c92ce6d | 429 | |
9de3e329 | 430 | case DNS_TYPE_MX: |
946c7094 | 431 | free(rr->mx.exchange); |
9de3e329 | 432 | break; |
9c92ce6d | 433 | |
abf126a3 TG |
434 | case DNS_TYPE_DS: |
435 | free(rr->ds.digest); | |
436 | break; | |
437 | ||
42cc2eeb | 438 | case DNS_TYPE_SSHFP: |
549c1a25 | 439 | free(rr->sshfp.fingerprint); |
42cc2eeb LP |
440 | break; |
441 | ||
8db0d2f5 ZJS |
442 | case DNS_TYPE_DNSKEY: |
443 | free(rr->dnskey.key); | |
444 | break; | |
445 | ||
151226ab ZJS |
446 | case DNS_TYPE_RRSIG: |
447 | free(rr->rrsig.signer); | |
448 | free(rr->rrsig.signature); | |
449 | break; | |
450 | ||
50f1e641 TG |
451 | case DNS_TYPE_NSEC: |
452 | free(rr->nsec.next_domain_name); | |
453 | bitmap_free(rr->nsec.types); | |
454 | break; | |
455 | ||
5d45a880 TG |
456 | case DNS_TYPE_NSEC3: |
457 | free(rr->nsec3.next_hashed_name); | |
458 | free(rr->nsec3.salt); | |
459 | bitmap_free(rr->nsec3.types); | |
460 | break; | |
461 | ||
0dae31d4 | 462 | case DNS_TYPE_LOC: |
9de3e329 ZJS |
463 | case DNS_TYPE_A: |
464 | case DNS_TYPE_AAAA: | |
465 | break; | |
9c92ce6d | 466 | |
48d45d2b ZJS |
467 | case DNS_TYPE_TLSA: |
468 | free(rr->tlsa.data); | |
469 | break; | |
470 | ||
95052df3 ZJS |
471 | case DNS_TYPE_CAA: |
472 | free(rr->caa.tag); | |
473 | free(rr->caa.value); | |
474 | break; | |
475 | ||
d93a16b8 | 476 | case DNS_TYPE_OPENPGPKEY: |
9de3e329 | 477 | default: |
52e085af | 478 | if (!rr->unparsable) |
bfc1d734 | 479 | free(rr->generic.data); |
9de3e329 | 480 | } |
322345fd | 481 | |
52e085af | 482 | if (rr->unparsable) |
bfc1d734 ZJS |
483 | free(rr->generic.data); |
484 | ||
a8812dd7 | 485 | free(rr->wire_format); |
faa133f3 LP |
486 | dns_resource_key_unref(rr->key); |
487 | } | |
322345fd | 488 | |
7b50eb2e | 489 | free(rr->to_string); |
6b430fdb | 490 | return mfree(rr); |
322345fd LP |
491 | } |
492 | ||
8301aa0b YW |
493 | DEFINE_TRIVIAL_REF_UNREF_FUNC(DnsResourceRecord, dns_resource_record, dns_resource_record_free); |
494 | ||
623a4c97 LP |
495 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) { |
496 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
497 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; | |
498 | _cleanup_free_ char *ptr = NULL; | |
499 | int r; | |
500 | ||
501 | assert(ret); | |
502 | assert(address); | |
503 | assert(hostname); | |
504 | ||
505 | r = dns_name_reverse(family, address, &ptr); | |
506 | if (r < 0) | |
507 | return r; | |
508 | ||
509 | key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr); | |
510 | if (!key) | |
511 | return -ENOMEM; | |
512 | ||
513 | ptr = NULL; | |
514 | ||
515 | rr = dns_resource_record_new(key); | |
516 | if (!rr) | |
517 | return -ENOMEM; | |
518 | ||
519 | rr->ptr.name = strdup(hostname); | |
520 | if (!rr->ptr.name) | |
521 | return -ENOMEM; | |
522 | ||
1cc6c93a | 523 | *ret = TAKE_PTR(rr); |
623a4c97 LP |
524 | |
525 | return 0; | |
526 | } | |
527 | ||
78c6a153 LP |
528 | int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name) { |
529 | DnsResourceRecord *rr; | |
530 | ||
531 | assert(ret); | |
532 | assert(address); | |
533 | assert(family); | |
534 | ||
535 | if (family == AF_INET) { | |
536 | ||
537 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, name); | |
538 | if (!rr) | |
539 | return -ENOMEM; | |
540 | ||
541 | rr->a.in_addr = address->in; | |
542 | ||
543 | } else if (family == AF_INET6) { | |
544 | ||
545 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, name); | |
546 | if (!rr) | |
547 | return -ENOMEM; | |
548 | ||
549 | rr->aaaa.in6_addr = address->in6; | |
550 | } else | |
551 | return -EAFNOSUPPORT; | |
552 | ||
553 | *ret = rr; | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
a43a068a ZJS |
558 | #define FIELD_EQUAL(a, b, field) \ |
559 | ((a).field ## _size == (b).field ## _size && \ | |
9bd2422a | 560 | memcmp_safe((a).field, (b).field, (a).field ## _size) == 0) |
a43a068a | 561 | |
51969a58 | 562 | int dns_resource_record_payload_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { |
322345fd LP |
563 | int r; |
564 | ||
51969a58 | 565 | /* Check if a and b are the same, but don't look at their keys */ |
322345fd | 566 | |
52e085af | 567 | if (a->unparsable != b->unparsable) |
fd0b4602 LP |
568 | return 0; |
569 | ||
52e085af | 570 | switch (a->unparsable ? _DNS_TYPE_INVALID : a->key->type) { |
2d4c5cbc | 571 | |
9c92ce6d LP |
572 | case DNS_TYPE_SRV: |
573 | r = dns_name_equal(a->srv.name, b->srv.name); | |
574 | if (r <= 0) | |
575 | return r; | |
576 | ||
577 | return a->srv.priority == b->srv.priority && | |
578 | a->srv.weight == b->srv.weight && | |
579 | a->srv.port == b->srv.port; | |
580 | ||
2d4c5cbc LP |
581 | case DNS_TYPE_PTR: |
582 | case DNS_TYPE_NS: | |
583 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 584 | case DNS_TYPE_DNAME: |
322345fd | 585 | return dns_name_equal(a->ptr.name, b->ptr.name); |
2d4c5cbc LP |
586 | |
587 | case DNS_TYPE_HINFO: | |
588 | return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && | |
589 | strcaseeq(a->hinfo.os, b->hinfo.os); | |
590 | ||
9de3e329 | 591 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
0f84a72e | 592 | case DNS_TYPE_TXT: |
2001c805 | 593 | return dns_txt_item_equal(a->txt.items, b->txt.items); |
2e276efc | 594 | |
2d4c5cbc | 595 | case DNS_TYPE_A: |
322345fd | 596 | return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; |
2d4c5cbc LP |
597 | |
598 | case DNS_TYPE_AAAA: | |
322345fd | 599 | return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; |
2d4c5cbc LP |
600 | |
601 | case DNS_TYPE_SOA: | |
7e8e0422 LP |
602 | r = dns_name_equal(a->soa.mname, b->soa.mname); |
603 | if (r <= 0) | |
604 | return r; | |
605 | r = dns_name_equal(a->soa.rname, b->soa.rname); | |
606 | if (r <= 0) | |
607 | return r; | |
608 | ||
609 | return a->soa.serial == b->soa.serial && | |
610 | a->soa.refresh == b->soa.refresh && | |
611 | a->soa.retry == b->soa.retry && | |
612 | a->soa.expire == b->soa.expire && | |
613 | a->soa.minimum == b->soa.minimum; | |
9c92ce6d | 614 | |
946c7094 ZJS |
615 | case DNS_TYPE_MX: |
616 | if (a->mx.priority != b->mx.priority) | |
617 | return 0; | |
618 | ||
619 | return dns_name_equal(a->mx.exchange, b->mx.exchange); | |
620 | ||
0dae31d4 ZJS |
621 | case DNS_TYPE_LOC: |
622 | assert(a->loc.version == b->loc.version); | |
623 | ||
624 | return a->loc.size == b->loc.size && | |
625 | a->loc.horiz_pre == b->loc.horiz_pre && | |
626 | a->loc.vert_pre == b->loc.vert_pre && | |
627 | a->loc.latitude == b->loc.latitude && | |
628 | a->loc.longitude == b->loc.longitude && | |
629 | a->loc.altitude == b->loc.altitude; | |
630 | ||
abf126a3 TG |
631 | case DNS_TYPE_DS: |
632 | return a->ds.key_tag == b->ds.key_tag && | |
633 | a->ds.algorithm == b->ds.algorithm && | |
634 | a->ds.digest_type == b->ds.digest_type && | |
a43a068a | 635 | FIELD_EQUAL(a->ds, b->ds, digest); |
abf126a3 | 636 | |
42cc2eeb LP |
637 | case DNS_TYPE_SSHFP: |
638 | return a->sshfp.algorithm == b->sshfp.algorithm && | |
639 | a->sshfp.fptype == b->sshfp.fptype && | |
a43a068a | 640 | FIELD_EQUAL(a->sshfp, b->sshfp, fingerprint); |
42cc2eeb | 641 | |
8db0d2f5 | 642 | case DNS_TYPE_DNSKEY: |
f91dc240 LP |
643 | return a->dnskey.flags == b->dnskey.flags && |
644 | a->dnskey.protocol == b->dnskey.protocol && | |
8db0d2f5 | 645 | a->dnskey.algorithm == b->dnskey.algorithm && |
a43a068a | 646 | FIELD_EQUAL(a->dnskey, b->dnskey, key); |
8db0d2f5 | 647 | |
151226ab ZJS |
648 | case DNS_TYPE_RRSIG: |
649 | /* do the fast comparisons first */ | |
a43a068a ZJS |
650 | return a->rrsig.type_covered == b->rrsig.type_covered && |
651 | a->rrsig.algorithm == b->rrsig.algorithm && | |
652 | a->rrsig.labels == b->rrsig.labels && | |
653 | a->rrsig.original_ttl == b->rrsig.original_ttl && | |
654 | a->rrsig.expiration == b->rrsig.expiration && | |
655 | a->rrsig.inception == b->rrsig.inception && | |
656 | a->rrsig.key_tag == b->rrsig.key_tag && | |
657 | FIELD_EQUAL(a->rrsig, b->rrsig, signature) && | |
658 | dns_name_equal(a->rrsig.signer, b->rrsig.signer); | |
151226ab | 659 | |
50f1e641 TG |
660 | case DNS_TYPE_NSEC: |
661 | return dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name) && | |
662 | bitmap_equal(a->nsec.types, b->nsec.types); | |
663 | ||
5d45a880 TG |
664 | case DNS_TYPE_NSEC3: |
665 | return a->nsec3.algorithm == b->nsec3.algorithm && | |
a43a068a ZJS |
666 | a->nsec3.flags == b->nsec3.flags && |
667 | a->nsec3.iterations == b->nsec3.iterations && | |
668 | FIELD_EQUAL(a->nsec3, b->nsec3, salt) && | |
669 | FIELD_EQUAL(a->nsec3, b->nsec3, next_hashed_name) && | |
670 | bitmap_equal(a->nsec3.types, b->nsec3.types); | |
5d45a880 | 671 | |
48d45d2b ZJS |
672 | case DNS_TYPE_TLSA: |
673 | return a->tlsa.cert_usage == b->tlsa.cert_usage && | |
674 | a->tlsa.selector == b->tlsa.selector && | |
675 | a->tlsa.matching_type == b->tlsa.matching_type && | |
a43a068a | 676 | FIELD_EQUAL(a->tlsa, b->tlsa, data); |
48d45d2b | 677 | |
95052df3 ZJS |
678 | case DNS_TYPE_CAA: |
679 | return a->caa.flags == b->caa.flags && | |
680 | streq(a->caa.tag, b->caa.tag) && | |
681 | FIELD_EQUAL(a->caa, b->caa, value); | |
682 | ||
683 | case DNS_TYPE_OPENPGPKEY: | |
2d4c5cbc | 684 | default: |
a43a068a | 685 | return FIELD_EQUAL(a->generic, b->generic, data); |
2d4c5cbc | 686 | } |
322345fd LP |
687 | } |
688 | ||
51969a58 ZJS |
689 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { |
690 | int r; | |
691 | ||
692 | assert(a); | |
693 | assert(b); | |
694 | ||
695 | if (a == b) | |
696 | return 1; | |
697 | ||
698 | r = dns_resource_key_equal(a->key, b->key); | |
699 | if (r <= 0) | |
700 | return r; | |
701 | ||
702 | return dns_resource_record_payload_equal(a, b); | |
703 | } | |
704 | ||
0dae31d4 ZJS |
705 | static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude, |
706 | uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) { | |
707 | char *s; | |
708 | char NS = latitude >= 1U<<31 ? 'N' : 'S'; | |
709 | char EW = longitude >= 1U<<31 ? 'E' : 'W'; | |
710 | ||
711 | int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude); | |
712 | int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude); | |
713 | double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude); | |
714 | double siz = (size >> 4) * exp10((double) (size & 0xF)); | |
715 | double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF)); | |
716 | double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF)); | |
717 | ||
718 | if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm", | |
719 | (lat / 60000 / 60), | |
720 | (lat / 60000) % 60, | |
721 | (lat % 60000) / 1000., | |
722 | NS, | |
723 | (lon / 60000 / 60), | |
724 | (lon / 60000) % 60, | |
725 | (lon % 60000) / 1000., | |
726 | EW, | |
727 | alt / 100., | |
728 | siz / 100., | |
729 | hor / 100., | |
730 | ver / 100.) < 0) | |
731 | return NULL; | |
732 | ||
733 | return s; | |
734 | } | |
735 | ||
7c6423e1 TG |
736 | static int format_timestamp_dns(char *buf, size_t l, time_t sec) { |
737 | struct tm tm; | |
738 | ||
739 | assert(buf); | |
fbd0b64f | 740 | assert(l > STRLEN("YYYYMMDDHHmmSS")); |
7c6423e1 TG |
741 | |
742 | if (!gmtime_r(&sec, &tm)) | |
743 | return -EINVAL; | |
744 | ||
745 | if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0) | |
746 | return -EINVAL; | |
747 | ||
748 | return 0; | |
749 | } | |
750 | ||
50f1e641 TG |
751 | static char *format_types(Bitmap *types) { |
752 | _cleanup_strv_free_ char **strv = NULL; | |
753 | _cleanup_free_ char *str = NULL; | |
754 | unsigned type; | |
755 | int r; | |
756 | ||
90e74a66 | 757 | BITMAP_FOREACH(type, types) { |
50f1e641 | 758 | if (dns_type_to_string(type)) { |
2c1fb4f7 | 759 | r = strv_extend(&strv, dns_type_to_string(type)); |
50f1e641 TG |
760 | if (r < 0) |
761 | return NULL; | |
762 | } else { | |
763 | char *t; | |
764 | ||
765 | r = asprintf(&t, "TYPE%u", type); | |
766 | if (r < 0) | |
767 | return NULL; | |
768 | ||
2c1fb4f7 | 769 | r = strv_consume(&strv, t); |
50f1e641 TG |
770 | if (r < 0) |
771 | return NULL; | |
772 | } | |
773 | } | |
774 | ||
775 | str = strv_join(strv, " "); | |
776 | if (!str) | |
777 | return NULL; | |
778 | ||
605405c6 | 779 | return strjoin("( ", str, " )"); |
50f1e641 TG |
780 | } |
781 | ||
2001c805 LP |
782 | static char *format_txt(DnsTxtItem *first) { |
783 | DnsTxtItem *i; | |
784 | size_t c = 1; | |
785 | char *p, *s; | |
786 | ||
787 | LIST_FOREACH(items, i, first) | |
788 | c += i->length * 4 + 3; | |
789 | ||
790 | p = s = new(char, c); | |
791 | if (!s) | |
792 | return NULL; | |
793 | ||
794 | LIST_FOREACH(items, i, first) { | |
795 | size_t j; | |
796 | ||
797 | if (i != first) | |
798 | *(p++) = ' '; | |
799 | ||
800 | *(p++) = '"'; | |
801 | ||
802 | for (j = 0; j < i->length; j++) { | |
803 | if (i->data[j] < ' ' || i->data[j] == '"' || i->data[j] >= 127) { | |
804 | *(p++) = '\\'; | |
805 | *(p++) = '0' + (i->data[j] / 100); | |
806 | *(p++) = '0' + ((i->data[j] / 10) % 10); | |
807 | *(p++) = '0' + (i->data[j] % 10); | |
808 | } else | |
809 | *(p++) = i->data[j]; | |
810 | } | |
811 | ||
812 | *(p++) = '"'; | |
813 | } | |
814 | ||
815 | *p = 0; | |
816 | return s; | |
817 | } | |
818 | ||
7b50eb2e | 819 | const char *dns_resource_record_to_string(DnsResourceRecord *rr) { |
202b76ae ZJS |
820 | _cleanup_free_ char *t = NULL; |
821 | char *s, k[DNS_RESOURCE_KEY_STRING_MAX]; | |
2d4c5cbc | 822 | int r; |
322345fd | 823 | |
2d4c5cbc | 824 | assert(rr); |
322345fd | 825 | |
7b50eb2e LP |
826 | if (rr->to_string) |
827 | return rr->to_string; | |
828 | ||
202b76ae | 829 | dns_resource_key_to_string(rr->key, k, sizeof(k)); |
322345fd | 830 | |
52e085af | 831 | switch (rr->unparsable ? _DNS_TYPE_INVALID : rr->key->type) { |
322345fd | 832 | |
9c92ce6d LP |
833 | case DNS_TYPE_SRV: |
834 | r = asprintf(&s, "%s %u %u %u %s", | |
835 | k, | |
836 | rr->srv.priority, | |
837 | rr->srv.weight, | |
838 | rr->srv.port, | |
839 | strna(rr->srv.name)); | |
840 | if (r < 0) | |
7b50eb2e | 841 | return NULL; |
9c92ce6d LP |
842 | break; |
843 | ||
2d4c5cbc LP |
844 | case DNS_TYPE_PTR: |
845 | case DNS_TYPE_NS: | |
846 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 847 | case DNS_TYPE_DNAME: |
605405c6 | 848 | s = strjoin(k, " ", rr->ptr.name); |
2d4c5cbc | 849 | if (!s) |
7b50eb2e | 850 | return NULL; |
322345fd | 851 | |
2d4c5cbc | 852 | break; |
322345fd | 853 | |
2d4c5cbc | 854 | case DNS_TYPE_HINFO: |
605405c6 | 855 | s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os); |
2d4c5cbc | 856 | if (!s) |
7b50eb2e | 857 | return NULL; |
2d4c5cbc | 858 | break; |
322345fd | 859 | |
9de3e329 | 860 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
8db0d2f5 | 861 | case DNS_TYPE_TXT: |
2001c805 | 862 | t = format_txt(rr->txt.items); |
2e276efc | 863 | if (!t) |
7b50eb2e | 864 | return NULL; |
2e276efc | 865 | |
605405c6 | 866 | s = strjoin(k, " ", t); |
2e276efc | 867 | if (!s) |
7b50eb2e | 868 | return NULL; |
2e276efc | 869 | break; |
2e276efc | 870 | |
2d4c5cbc LP |
871 | case DNS_TYPE_A: { |
872 | _cleanup_free_ char *x = NULL; | |
322345fd | 873 | |
2d4c5cbc LP |
874 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x); |
875 | if (r < 0) | |
7b50eb2e | 876 | return NULL; |
322345fd | 877 | |
605405c6 | 878 | s = strjoin(k, " ", x); |
2d4c5cbc | 879 | if (!s) |
7b50eb2e | 880 | return NULL; |
2d4c5cbc LP |
881 | break; |
882 | } | |
322345fd | 883 | |
8db0d2f5 ZJS |
884 | case DNS_TYPE_AAAA: |
885 | r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); | |
2d4c5cbc | 886 | if (r < 0) |
7b50eb2e | 887 | return NULL; |
322345fd | 888 | |
605405c6 | 889 | s = strjoin(k, " ", t); |
2d4c5cbc | 890 | if (!s) |
7b50eb2e | 891 | return NULL; |
2d4c5cbc | 892 | break; |
322345fd | 893 | |
2d4c5cbc LP |
894 | case DNS_TYPE_SOA: |
895 | r = asprintf(&s, "%s %s %s %u %u %u %u %u", | |
896 | k, | |
897 | strna(rr->soa.mname), | |
898 | strna(rr->soa.rname), | |
899 | rr->soa.serial, | |
900 | rr->soa.refresh, | |
901 | rr->soa.retry, | |
902 | rr->soa.expire, | |
903 | rr->soa.minimum); | |
904 | if (r < 0) | |
7b50eb2e | 905 | return NULL; |
2d4c5cbc LP |
906 | break; |
907 | ||
946c7094 ZJS |
908 | case DNS_TYPE_MX: |
909 | r = asprintf(&s, "%s %u %s", | |
910 | k, | |
911 | rr->mx.priority, | |
912 | rr->mx.exchange); | |
913 | if (r < 0) | |
7b50eb2e | 914 | return NULL; |
946c7094 ZJS |
915 | break; |
916 | ||
8db0d2f5 | 917 | case DNS_TYPE_LOC: |
0dae31d4 ZJS |
918 | assert(rr->loc.version == 0); |
919 | ||
8db0d2f5 ZJS |
920 | t = format_location(rr->loc.latitude, |
921 | rr->loc.longitude, | |
922 | rr->loc.altitude, | |
923 | rr->loc.size, | |
924 | rr->loc.horiz_pre, | |
925 | rr->loc.vert_pre); | |
926 | if (!t) | |
7b50eb2e | 927 | return NULL; |
0dae31d4 | 928 | |
605405c6 | 929 | s = strjoin(k, " ", t); |
0dae31d4 | 930 | if (!s) |
7b50eb2e | 931 | return NULL; |
0dae31d4 | 932 | break; |
0dae31d4 | 933 | |
abf126a3 TG |
934 | case DNS_TYPE_DS: |
935 | t = hexmem(rr->ds.digest, rr->ds.digest_size); | |
936 | if (!t) | |
7b50eb2e | 937 | return NULL; |
abf126a3 TG |
938 | |
939 | r = asprintf(&s, "%s %u %u %u %s", | |
940 | k, | |
941 | rr->ds.key_tag, | |
942 | rr->ds.algorithm, | |
943 | rr->ds.digest_type, | |
944 | t); | |
945 | if (r < 0) | |
7b50eb2e | 946 | return NULL; |
abf126a3 TG |
947 | break; |
948 | ||
8db0d2f5 | 949 | case DNS_TYPE_SSHFP: |
549c1a25 | 950 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); |
8db0d2f5 | 951 | if (!t) |
7b50eb2e | 952 | return NULL; |
42cc2eeb LP |
953 | |
954 | r = asprintf(&s, "%s %u %u %s", | |
955 | k, | |
956 | rr->sshfp.algorithm, | |
957 | rr->sshfp.fptype, | |
8db0d2f5 | 958 | t); |
42cc2eeb | 959 | if (r < 0) |
7b50eb2e | 960 | return NULL; |
42cc2eeb | 961 | break; |
42cc2eeb | 962 | |
ff3d6560 | 963 | case DNS_TYPE_DNSKEY: { |
8e54f5d9 | 964 | _cleanup_free_ char *alg = NULL; |
99e5ca6d | 965 | char *ss; |
fc8eec10 ZJS |
966 | uint16_t key_tag; |
967 | ||
968 | key_tag = dnssec_keytag(rr, true); | |
ff3d6560 | 969 | |
8e54f5d9 LP |
970 | r = dnssec_algorithm_to_string_alloc(rr->dnskey.algorithm, &alg); |
971 | if (r < 0) | |
972 | return NULL; | |
ff3d6560 | 973 | |
4bb91a95 | 974 | r = asprintf(&s, "%s %u %u %s", |
8db0d2f5 | 975 | k, |
f91dc240 LP |
976 | rr->dnskey.flags, |
977 | rr->dnskey.protocol, | |
4bb91a95 | 978 | alg); |
8db0d2f5 | 979 | if (r < 0) |
7b50eb2e | 980 | return NULL; |
d7671a3e | 981 | |
4bb91a95 | 982 | r = base64_append(&s, r, |
d7671a3e ZJS |
983 | rr->dnskey.key, rr->dnskey.key_size, |
984 | 8, columns()); | |
985 | if (r < 0) | |
986 | return NULL; | |
987 | ||
99e5ca6d | 988 | r = asprintf(&ss, "%s\n" |
718af59e ZJS |
989 | " -- Flags:%s%s%s\n" |
990 | " -- Key tag: %u", | |
99e5ca6d | 991 | s, |
99e5ca6d ZJS |
992 | rr->dnskey.flags & DNSKEY_FLAG_SEP ? " SEP" : "", |
993 | rr->dnskey.flags & DNSKEY_FLAG_REVOKE ? " REVOKE" : "", | |
fc8eec10 | 994 | rr->dnskey.flags & DNSKEY_FLAG_ZONE_KEY ? " ZONE_KEY" : "", |
fc8eec10 | 995 | key_tag); |
99e5ca6d ZJS |
996 | if (r < 0) |
997 | return NULL; | |
998 | free(s); | |
999 | s = ss; | |
1000 | ||
8db0d2f5 | 1001 | break; |
ff3d6560 | 1002 | } |
2d4c5cbc | 1003 | |
151226ab | 1004 | case DNS_TYPE_RRSIG: { |
8e54f5d9 | 1005 | _cleanup_free_ char *alg = NULL; |
fbd0b64f | 1006 | char expiration[STRLEN("YYYYMMDDHHmmSS") + 1], inception[STRLEN("YYYYMMDDHHmmSS") + 1]; |
8e54f5d9 | 1007 | const char *type; |
151226ab ZJS |
1008 | |
1009 | type = dns_type_to_string(rr->rrsig.type_covered); | |
8e54f5d9 LP |
1010 | |
1011 | r = dnssec_algorithm_to_string_alloc(rr->rrsig.algorithm, &alg); | |
1012 | if (r < 0) | |
1013 | return NULL; | |
151226ab | 1014 | |
7c6423e1 TG |
1015 | r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration); |
1016 | if (r < 0) | |
7b50eb2e | 1017 | return NULL; |
7c6423e1 TG |
1018 | |
1019 | r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception); | |
1020 | if (r < 0) | |
7b50eb2e | 1021 | return NULL; |
7c6423e1 | 1022 | |
151226ab ZJS |
1023 | /* TYPE?? follows |
1024 | * http://tools.ietf.org/html/rfc3597#section-5 */ | |
1025 | ||
4bb91a95 | 1026 | r = asprintf(&s, "%s %s%.*u %s %u %u %s %s %u %s", |
151226ab ZJS |
1027 | k, |
1028 | type ?: "TYPE", | |
1029 | type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, | |
8e54f5d9 | 1030 | alg, |
151226ab ZJS |
1031 | rr->rrsig.labels, |
1032 | rr->rrsig.original_ttl, | |
7c6423e1 TG |
1033 | expiration, |
1034 | inception, | |
151226ab | 1035 | rr->rrsig.key_tag, |
4bb91a95 | 1036 | rr->rrsig.signer); |
151226ab | 1037 | if (r < 0) |
7b50eb2e | 1038 | return NULL; |
d7671a3e | 1039 | |
4bb91a95 | 1040 | r = base64_append(&s, r, |
d7671a3e ZJS |
1041 | rr->rrsig.signature, rr->rrsig.signature_size, |
1042 | 8, columns()); | |
1043 | if (r < 0) | |
1044 | return NULL; | |
1045 | ||
151226ab ZJS |
1046 | break; |
1047 | } | |
1048 | ||
50f1e641 TG |
1049 | case DNS_TYPE_NSEC: |
1050 | t = format_types(rr->nsec.types); | |
1051 | if (!t) | |
7b50eb2e | 1052 | return NULL; |
50f1e641 TG |
1053 | |
1054 | r = asprintf(&s, "%s %s %s", | |
1055 | k, | |
1056 | rr->nsec.next_domain_name, | |
1057 | t); | |
1058 | if (r < 0) | |
7b50eb2e | 1059 | return NULL; |
50f1e641 TG |
1060 | break; |
1061 | ||
5d45a880 TG |
1062 | case DNS_TYPE_NSEC3: { |
1063 | _cleanup_free_ char *salt = NULL, *hash = NULL; | |
1064 | ||
f5430a3e | 1065 | if (rr->nsec3.salt_size > 0) { |
5d45a880 TG |
1066 | salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size); |
1067 | if (!salt) | |
7b50eb2e | 1068 | return NULL; |
5d45a880 TG |
1069 | } |
1070 | ||
1071 | hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false); | |
1072 | if (!hash) | |
7b50eb2e | 1073 | return NULL; |
5d45a880 TG |
1074 | |
1075 | t = format_types(rr->nsec3.types); | |
1076 | if (!t) | |
7b50eb2e | 1077 | return NULL; |
5d45a880 TG |
1078 | |
1079 | r = asprintf(&s, "%s %"PRIu8" %"PRIu8" %"PRIu16" %s %s %s", | |
1080 | k, | |
1081 | rr->nsec3.algorithm, | |
1082 | rr->nsec3.flags, | |
1083 | rr->nsec3.iterations, | |
f5430a3e | 1084 | rr->nsec3.salt_size > 0 ? salt : "-", |
5d45a880 TG |
1085 | hash, |
1086 | t); | |
1087 | if (r < 0) | |
7b50eb2e | 1088 | return NULL; |
5d45a880 TG |
1089 | |
1090 | break; | |
1091 | } | |
1092 | ||
48d45d2b | 1093 | case DNS_TYPE_TLSA: { |
cfb90da3 | 1094 | const char *cert_usage, *selector, *matching_type; |
48d45d2b | 1095 | |
cfb90da3 ZJS |
1096 | cert_usage = tlsa_cert_usage_to_string(rr->tlsa.cert_usage); |
1097 | selector = tlsa_selector_to_string(rr->tlsa.selector); | |
1098 | matching_type = tlsa_matching_type_to_string(rr->tlsa.matching_type); | |
1099 | ||
236d312b ZJS |
1100 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); |
1101 | if (!t) | |
48d45d2b | 1102 | return NULL; |
cfb90da3 | 1103 | |
236d312b ZJS |
1104 | r = asprintf(&s, |
1105 | "%s %u %u %u %s\n" | |
718af59e ZJS |
1106 | " -- Cert. usage: %s\n" |
1107 | " -- Selector: %s\n" | |
1108 | " -- Matching type: %s", | |
236d312b ZJS |
1109 | k, |
1110 | rr->tlsa.cert_usage, | |
1111 | rr->tlsa.selector, | |
1112 | rr->tlsa.matching_type, | |
1113 | t, | |
718af59e ZJS |
1114 | cert_usage, |
1115 | selector, | |
1116 | matching_type); | |
cfb90da3 ZJS |
1117 | if (r < 0) |
1118 | return NULL; | |
cfb90da3 | 1119 | |
48d45d2b ZJS |
1120 | break; |
1121 | } | |
1122 | ||
95052df3 ZJS |
1123 | case DNS_TYPE_CAA: { |
1124 | _cleanup_free_ char *value; | |
1125 | ||
1126 | value = octescape(rr->caa.value, rr->caa.value_size); | |
1127 | if (!value) | |
1128 | return NULL; | |
1129 | ||
718af59e | 1130 | r = asprintf(&s, "%s %u %s \"%s\"%s%s%s%.0u", |
95052df3 ZJS |
1131 | k, |
1132 | rr->caa.flags, | |
1133 | rr->caa.tag, | |
718af59e ZJS |
1134 | value, |
1135 | rr->caa.flags ? "\n -- Flags:" : "", | |
1136 | rr->caa.flags & CAA_FLAG_CRITICAL ? " critical" : "", | |
1137 | rr->caa.flags & ~CAA_FLAG_CRITICAL ? " " : "", | |
1138 | rr->caa.flags & ~CAA_FLAG_CRITICAL); | |
95052df3 ZJS |
1139 | if (r < 0) |
1140 | return NULL; | |
1141 | ||
1142 | break; | |
1143 | } | |
1144 | ||
d93a16b8 | 1145 | case DNS_TYPE_OPENPGPKEY: { |
4bb91a95 | 1146 | r = asprintf(&s, "%s", k); |
d93a16b8 ZJS |
1147 | if (r < 0) |
1148 | return NULL; | |
1149 | ||
4bb91a95 | 1150 | r = base64_append(&s, r, |
a43a068a | 1151 | rr->generic.data, rr->generic.data_size, |
d93a16b8 ZJS |
1152 | 8, columns()); |
1153 | if (r < 0) | |
1154 | return NULL; | |
1155 | break; | |
1156 | } | |
1157 | ||
8db0d2f5 | 1158 | default: |
a43a068a | 1159 | t = hexmem(rr->generic.data, rr->generic.data_size); |
8db0d2f5 | 1160 | if (!t) |
7b50eb2e | 1161 | return NULL; |
8db0d2f5 | 1162 | |
6af47493 | 1163 | /* Format as documented in RFC 3597, Section 5 */ |
a43a068a | 1164 | r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.data_size, t); |
d23a27a9 | 1165 | if (r < 0) |
7b50eb2e | 1166 | return NULL; |
2d4c5cbc | 1167 | break; |
8db0d2f5 | 1168 | } |
2d4c5cbc | 1169 | |
7b50eb2e LP |
1170 | rr->to_string = s; |
1171 | return s; | |
2d4c5cbc | 1172 | } |
322345fd | 1173 | |
2e74028a ZJS |
1174 | ssize_t dns_resource_record_payload(DnsResourceRecord *rr, void **out) { |
1175 | assert(rr); | |
1176 | assert(out); | |
1177 | ||
52e085af | 1178 | switch(rr->unparsable ? _DNS_TYPE_INVALID : rr->key->type) { |
2e74028a ZJS |
1179 | case DNS_TYPE_SRV: |
1180 | case DNS_TYPE_PTR: | |
1181 | case DNS_TYPE_NS: | |
1182 | case DNS_TYPE_CNAME: | |
1183 | case DNS_TYPE_DNAME: | |
1184 | case DNS_TYPE_HINFO: | |
1185 | case DNS_TYPE_SPF: | |
1186 | case DNS_TYPE_TXT: | |
1187 | case DNS_TYPE_A: | |
1188 | case DNS_TYPE_AAAA: | |
1189 | case DNS_TYPE_SOA: | |
1190 | case DNS_TYPE_MX: | |
1191 | case DNS_TYPE_LOC: | |
1192 | case DNS_TYPE_DS: | |
2e74028a ZJS |
1193 | case DNS_TYPE_DNSKEY: |
1194 | case DNS_TYPE_RRSIG: | |
1195 | case DNS_TYPE_NSEC: | |
1196 | case DNS_TYPE_NSEC3: | |
1197 | return -EINVAL; | |
1198 | ||
e1caa6e0 ZJS |
1199 | case DNS_TYPE_SSHFP: |
1200 | *out = rr->sshfp.fingerprint; | |
1201 | return rr->sshfp.fingerprint_size; | |
1202 | ||
2e74028a ZJS |
1203 | case DNS_TYPE_TLSA: |
1204 | *out = rr->tlsa.data; | |
1205 | return rr->tlsa.data_size; | |
1206 | ||
2e74028a ZJS |
1207 | case DNS_TYPE_OPENPGPKEY: |
1208 | default: | |
1209 | *out = rr->generic.data; | |
1210 | return rr->generic.data_size; | |
1211 | } | |
1212 | } | |
1213 | ||
a8812dd7 LP |
1214 | int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical) { |
1215 | ||
1216 | DnsPacket packet = { | |
1217 | .n_ref = 1, | |
1218 | .protocol = DNS_PROTOCOL_DNS, | |
1219 | .on_stack = true, | |
1220 | .refuse_compression = true, | |
1221 | .canonical_form = canonical, | |
1222 | }; | |
1223 | ||
1224 | size_t start, rds; | |
1225 | int r; | |
1226 | ||
1227 | assert(rr); | |
1228 | ||
1229 | /* Generates the RR in wire-format, optionally in the | |
1230 | * canonical form as discussed in the DNSSEC RFC 4034, Section | |
1231 | * 6.2. We allocate a throw-away DnsPacket object on the stack | |
1232 | * here, because we need some book-keeping for memory | |
1233 | * management, and can reuse the DnsPacket serializer, that | |
1234 | * can generate the canonical form, too, but also knows label | |
1235 | * compression and suchlike. */ | |
1236 | ||
1237 | if (rr->wire_format && rr->wire_format_canonical == canonical) | |
1238 | return 0; | |
1239 | ||
58ab31d5 | 1240 | r = dns_packet_append_rr(&packet, rr, 0, &start, &rds); |
a8812dd7 LP |
1241 | if (r < 0) |
1242 | return r; | |
1243 | ||
1244 | assert(start == 0); | |
1245 | assert(packet._data); | |
1246 | ||
1247 | free(rr->wire_format); | |
1248 | rr->wire_format = packet._data; | |
1249 | rr->wire_format_size = packet.size; | |
1250 | rr->wire_format_rdata_offset = rds; | |
1251 | rr->wire_format_canonical = canonical; | |
1252 | ||
1253 | packet._data = NULL; | |
1254 | dns_packet_unref(&packet); | |
1255 | ||
1256 | return 0; | |
1257 | } | |
1258 | ||
97c67192 LP |
1259 | int dns_resource_record_signer(DnsResourceRecord *rr, const char **ret) { |
1260 | const char *n; | |
1261 | int r; | |
1262 | ||
1263 | assert(rr); | |
1264 | assert(ret); | |
1265 | ||
1266 | /* Returns the RRset's signer, if it is known. */ | |
1267 | ||
1268 | if (rr->n_skip_labels_signer == (unsigned) -1) | |
1269 | return -ENODATA; | |
1270 | ||
1c02e7ba | 1271 | n = dns_resource_key_name(rr->key); |
97c67192 LP |
1272 | r = dns_name_skip(n, rr->n_skip_labels_signer, &n); |
1273 | if (r < 0) | |
1274 | return r; | |
1275 | if (r == 0) | |
1276 | return -EINVAL; | |
1277 | ||
1278 | *ret = n; | |
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | int dns_resource_record_source(DnsResourceRecord *rr, const char **ret) { | |
1283 | const char *n; | |
1284 | int r; | |
1285 | ||
1286 | assert(rr); | |
1287 | assert(ret); | |
1288 | ||
1289 | /* Returns the RRset's synthesizing source, if it is known. */ | |
1290 | ||
1291 | if (rr->n_skip_labels_source == (unsigned) -1) | |
1292 | return -ENODATA; | |
1293 | ||
1c02e7ba | 1294 | n = dns_resource_key_name(rr->key); |
97c67192 LP |
1295 | r = dns_name_skip(n, rr->n_skip_labels_source, &n); |
1296 | if (r < 0) | |
1297 | return r; | |
1298 | if (r == 0) | |
1299 | return -EINVAL; | |
1300 | ||
1301 | *ret = n; | |
1302 | return 0; | |
1303 | } | |
1304 | ||
1305 | int dns_resource_record_is_signer(DnsResourceRecord *rr, const char *zone) { | |
1306 | const char *signer; | |
1307 | int r; | |
1308 | ||
ab481675 LP |
1309 | assert(rr); |
1310 | ||
97c67192 LP |
1311 | r = dns_resource_record_signer(rr, &signer); |
1312 | if (r < 0) | |
1313 | return r; | |
1314 | ||
1315 | return dns_name_equal(zone, signer); | |
1316 | } | |
1317 | ||
ab481675 LP |
1318 | int dns_resource_record_is_synthetic(DnsResourceRecord *rr) { |
1319 | int r; | |
1320 | ||
1321 | assert(rr); | |
1322 | ||
1323 | /* Returns > 0 if the RR is generated from a wildcard, and is not the asterisk name itself */ | |
1324 | ||
1325 | if (rr->n_skip_labels_source == (unsigned) -1) | |
1326 | return -ENODATA; | |
1327 | ||
1328 | if (rr->n_skip_labels_source == 0) | |
1329 | return 0; | |
1330 | ||
1331 | if (rr->n_skip_labels_source > 1) | |
1332 | return 1; | |
1333 | ||
1c02e7ba | 1334 | r = dns_name_startswith(dns_resource_key_name(rr->key), "*"); |
ab481675 LP |
1335 | if (r < 0) |
1336 | return r; | |
1337 | ||
1338 | return !r; | |
1339 | } | |
1340 | ||
7a08d314 | 1341 | void dns_resource_record_hash_func(const DnsResourceRecord *rr, struct siphash *state) { |
c9c72065 LP |
1342 | assert(rr); |
1343 | ||
1344 | dns_resource_key_hash_func(rr->key, state); | |
1345 | ||
52e085af | 1346 | switch (rr->unparsable ? _DNS_TYPE_INVALID : rr->key->type) { |
c9c72065 LP |
1347 | |
1348 | case DNS_TYPE_SRV: | |
1349 | siphash24_compress(&rr->srv.priority, sizeof(rr->srv.priority), state); | |
1350 | siphash24_compress(&rr->srv.weight, sizeof(rr->srv.weight), state); | |
1351 | siphash24_compress(&rr->srv.port, sizeof(rr->srv.port), state); | |
1352 | dns_name_hash_func(rr->srv.name, state); | |
1353 | break; | |
1354 | ||
1355 | case DNS_TYPE_PTR: | |
1356 | case DNS_TYPE_NS: | |
1357 | case DNS_TYPE_CNAME: | |
1358 | case DNS_TYPE_DNAME: | |
1359 | dns_name_hash_func(rr->ptr.name, state); | |
1360 | break; | |
1361 | ||
1362 | case DNS_TYPE_HINFO: | |
1363 | string_hash_func(rr->hinfo.cpu, state); | |
1364 | string_hash_func(rr->hinfo.os, state); | |
1365 | break; | |
1366 | ||
1367 | case DNS_TYPE_TXT: | |
1368 | case DNS_TYPE_SPF: { | |
1369 | DnsTxtItem *j; | |
1370 | ||
1371 | LIST_FOREACH(items, j, rr->txt.items) { | |
b652ccca | 1372 | siphash24_compress_safe(j->data, j->length, state); |
c9c72065 | 1373 | |
d5115566 LP |
1374 | /* Add an extra NUL byte, so that "a" followed by "b" doesn't result in the same hash as "ab" |
1375 | * followed by "". */ | |
1376 | siphash24_compress_byte(0, state); | |
c9c72065 LP |
1377 | } |
1378 | break; | |
1379 | } | |
1380 | ||
1381 | case DNS_TYPE_A: | |
1382 | siphash24_compress(&rr->a.in_addr, sizeof(rr->a.in_addr), state); | |
1383 | break; | |
1384 | ||
1385 | case DNS_TYPE_AAAA: | |
1386 | siphash24_compress(&rr->aaaa.in6_addr, sizeof(rr->aaaa.in6_addr), state); | |
1387 | break; | |
1388 | ||
1389 | case DNS_TYPE_SOA: | |
1390 | dns_name_hash_func(rr->soa.mname, state); | |
1391 | dns_name_hash_func(rr->soa.rname, state); | |
1392 | siphash24_compress(&rr->soa.serial, sizeof(rr->soa.serial), state); | |
1393 | siphash24_compress(&rr->soa.refresh, sizeof(rr->soa.refresh), state); | |
1394 | siphash24_compress(&rr->soa.retry, sizeof(rr->soa.retry), state); | |
1395 | siphash24_compress(&rr->soa.expire, sizeof(rr->soa.expire), state); | |
1396 | siphash24_compress(&rr->soa.minimum, sizeof(rr->soa.minimum), state); | |
1397 | break; | |
1398 | ||
1399 | case DNS_TYPE_MX: | |
1400 | siphash24_compress(&rr->mx.priority, sizeof(rr->mx.priority), state); | |
1401 | dns_name_hash_func(rr->mx.exchange, state); | |
1402 | break; | |
1403 | ||
1404 | case DNS_TYPE_LOC: | |
1405 | siphash24_compress(&rr->loc.version, sizeof(rr->loc.version), state); | |
1406 | siphash24_compress(&rr->loc.size, sizeof(rr->loc.size), state); | |
1407 | siphash24_compress(&rr->loc.horiz_pre, sizeof(rr->loc.horiz_pre), state); | |
1408 | siphash24_compress(&rr->loc.vert_pre, sizeof(rr->loc.vert_pre), state); | |
1409 | siphash24_compress(&rr->loc.latitude, sizeof(rr->loc.latitude), state); | |
1410 | siphash24_compress(&rr->loc.longitude, sizeof(rr->loc.longitude), state); | |
1411 | siphash24_compress(&rr->loc.altitude, sizeof(rr->loc.altitude), state); | |
1412 | break; | |
1413 | ||
1414 | case DNS_TYPE_SSHFP: | |
1415 | siphash24_compress(&rr->sshfp.algorithm, sizeof(rr->sshfp.algorithm), state); | |
1416 | siphash24_compress(&rr->sshfp.fptype, sizeof(rr->sshfp.fptype), state); | |
b652ccca | 1417 | siphash24_compress_safe(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size, state); |
c9c72065 LP |
1418 | break; |
1419 | ||
1420 | case DNS_TYPE_DNSKEY: | |
1421 | siphash24_compress(&rr->dnskey.flags, sizeof(rr->dnskey.flags), state); | |
1422 | siphash24_compress(&rr->dnskey.protocol, sizeof(rr->dnskey.protocol), state); | |
1423 | siphash24_compress(&rr->dnskey.algorithm, sizeof(rr->dnskey.algorithm), state); | |
b652ccca | 1424 | siphash24_compress_safe(rr->dnskey.key, rr->dnskey.key_size, state); |
c9c72065 LP |
1425 | break; |
1426 | ||
1427 | case DNS_TYPE_RRSIG: | |
1428 | siphash24_compress(&rr->rrsig.type_covered, sizeof(rr->rrsig.type_covered), state); | |
1429 | siphash24_compress(&rr->rrsig.algorithm, sizeof(rr->rrsig.algorithm), state); | |
1430 | siphash24_compress(&rr->rrsig.labels, sizeof(rr->rrsig.labels), state); | |
1431 | siphash24_compress(&rr->rrsig.original_ttl, sizeof(rr->rrsig.original_ttl), state); | |
1432 | siphash24_compress(&rr->rrsig.expiration, sizeof(rr->rrsig.expiration), state); | |
1433 | siphash24_compress(&rr->rrsig.inception, sizeof(rr->rrsig.inception), state); | |
1434 | siphash24_compress(&rr->rrsig.key_tag, sizeof(rr->rrsig.key_tag), state); | |
1435 | dns_name_hash_func(rr->rrsig.signer, state); | |
b652ccca | 1436 | siphash24_compress_safe(rr->rrsig.signature, rr->rrsig.signature_size, state); |
c9c72065 LP |
1437 | break; |
1438 | ||
1439 | case DNS_TYPE_NSEC: | |
1440 | dns_name_hash_func(rr->nsec.next_domain_name, state); | |
1441 | /* FIXME: we leave out the type bitmap here. Hash | |
1442 | * would be better if we'd take it into account | |
1443 | * too. */ | |
1444 | break; | |
1445 | ||
1446 | case DNS_TYPE_DS: | |
1447 | siphash24_compress(&rr->ds.key_tag, sizeof(rr->ds.key_tag), state); | |
1448 | siphash24_compress(&rr->ds.algorithm, sizeof(rr->ds.algorithm), state); | |
1449 | siphash24_compress(&rr->ds.digest_type, sizeof(rr->ds.digest_type), state); | |
b652ccca | 1450 | siphash24_compress_safe(rr->ds.digest, rr->ds.digest_size, state); |
c9c72065 LP |
1451 | break; |
1452 | ||
1453 | case DNS_TYPE_NSEC3: | |
1454 | siphash24_compress(&rr->nsec3.algorithm, sizeof(rr->nsec3.algorithm), state); | |
1455 | siphash24_compress(&rr->nsec3.flags, sizeof(rr->nsec3.flags), state); | |
1456 | siphash24_compress(&rr->nsec3.iterations, sizeof(rr->nsec3.iterations), state); | |
b652ccca YW |
1457 | siphash24_compress_safe(rr->nsec3.salt, rr->nsec3.salt_size, state); |
1458 | siphash24_compress_safe(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, state); | |
c9c72065 LP |
1459 | /* FIXME: We leave the bitmaps out */ |
1460 | break; | |
48d45d2b ZJS |
1461 | |
1462 | case DNS_TYPE_TLSA: | |
1463 | siphash24_compress(&rr->tlsa.cert_usage, sizeof(rr->tlsa.cert_usage), state); | |
1464 | siphash24_compress(&rr->tlsa.selector, sizeof(rr->tlsa.selector), state); | |
1465 | siphash24_compress(&rr->tlsa.matching_type, sizeof(rr->tlsa.matching_type), state); | |
b652ccca | 1466 | siphash24_compress_safe(rr->tlsa.data, rr->tlsa.data_size, state); |
48d45d2b | 1467 | break; |
c9c72065 | 1468 | |
95052df3 ZJS |
1469 | case DNS_TYPE_CAA: |
1470 | siphash24_compress(&rr->caa.flags, sizeof(rr->caa.flags), state); | |
1471 | string_hash_func(rr->caa.tag, state); | |
b652ccca | 1472 | siphash24_compress_safe(rr->caa.value, rr->caa.value_size, state); |
48d45d2b | 1473 | break; |
c9c72065 | 1474 | |
d93a16b8 | 1475 | case DNS_TYPE_OPENPGPKEY: |
c9c72065 | 1476 | default: |
b652ccca | 1477 | siphash24_compress_safe(rr->generic.data, rr->generic.data_size, state); |
c9c72065 LP |
1478 | break; |
1479 | } | |
1480 | } | |
1481 | ||
ae45e1a3 | 1482 | int dns_resource_record_compare_func(const DnsResourceRecord *x, const DnsResourceRecord *y) { |
7a08d314 | 1483 | int r; |
c9c72065 | 1484 | |
7a08d314 YW |
1485 | r = dns_resource_key_compare_func(x->key, y->key); |
1486 | if (r != 0) | |
1487 | return r; | |
c9c72065 | 1488 | |
cd70fc37 | 1489 | if (dns_resource_record_payload_equal(x, y) > 0) |
c9c72065 LP |
1490 | return 0; |
1491 | ||
53c5797f FB |
1492 | /* We still use CMP() here, even though don't implement proper |
1493 | * ordering, since the hashtable doesn't need ordering anyway. */ | |
1494 | return CMP(x, y); | |
c9c72065 LP |
1495 | } |
1496 | ||
7a08d314 | 1497 | DEFINE_HASH_OPS(dns_resource_record_hash_ops, DnsResourceRecord, dns_resource_record_hash_func, dns_resource_record_compare_func); |
c9c72065 | 1498 | |
17c8de63 LP |
1499 | DnsResourceRecord *dns_resource_record_copy(DnsResourceRecord *rr) { |
1500 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *copy = NULL; | |
1501 | DnsResourceRecord *t; | |
1502 | ||
1503 | assert(rr); | |
1504 | ||
1505 | copy = dns_resource_record_new(rr->key); | |
1506 | if (!copy) | |
1507 | return NULL; | |
1508 | ||
1509 | copy->ttl = rr->ttl; | |
1510 | copy->expiry = rr->expiry; | |
1511 | copy->n_skip_labels_signer = rr->n_skip_labels_signer; | |
1512 | copy->n_skip_labels_source = rr->n_skip_labels_source; | |
52e085af | 1513 | copy->unparsable = rr->unparsable; |
17c8de63 | 1514 | |
52e085af | 1515 | switch (rr->unparsable ? _DNS_TYPE_INVALID : rr->key->type) { |
17c8de63 LP |
1516 | |
1517 | case DNS_TYPE_SRV: | |
1518 | copy->srv.priority = rr->srv.priority; | |
1519 | copy->srv.weight = rr->srv.weight; | |
1520 | copy->srv.port = rr->srv.port; | |
1521 | copy->srv.name = strdup(rr->srv.name); | |
1522 | if (!copy->srv.name) | |
1523 | return NULL; | |
1524 | break; | |
1525 | ||
1526 | case DNS_TYPE_PTR: | |
1527 | case DNS_TYPE_NS: | |
1528 | case DNS_TYPE_CNAME: | |
1529 | case DNS_TYPE_DNAME: | |
1530 | copy->ptr.name = strdup(rr->ptr.name); | |
1531 | if (!copy->ptr.name) | |
1532 | return NULL; | |
1533 | break; | |
1534 | ||
1535 | case DNS_TYPE_HINFO: | |
1536 | copy->hinfo.cpu = strdup(rr->hinfo.cpu); | |
1537 | if (!copy->hinfo.cpu) | |
1538 | return NULL; | |
1539 | ||
1540 | copy->hinfo.os = strdup(rr->hinfo.os); | |
508f63b4 | 1541 | if (!copy->hinfo.os) |
17c8de63 LP |
1542 | return NULL; |
1543 | break; | |
1544 | ||
1545 | case DNS_TYPE_TXT: | |
1546 | case DNS_TYPE_SPF: | |
1547 | copy->txt.items = dns_txt_item_copy(rr->txt.items); | |
1548 | if (!copy->txt.items) | |
1549 | return NULL; | |
1550 | break; | |
1551 | ||
1552 | case DNS_TYPE_A: | |
1553 | copy->a = rr->a; | |
1554 | break; | |
1555 | ||
1556 | case DNS_TYPE_AAAA: | |
1557 | copy->aaaa = rr->aaaa; | |
1558 | break; | |
1559 | ||
1560 | case DNS_TYPE_SOA: | |
1561 | copy->soa.mname = strdup(rr->soa.mname); | |
1562 | if (!copy->soa.mname) | |
1563 | return NULL; | |
1564 | copy->soa.rname = strdup(rr->soa.rname); | |
1565 | if (!copy->soa.rname) | |
1566 | return NULL; | |
1567 | copy->soa.serial = rr->soa.serial; | |
1568 | copy->soa.refresh = rr->soa.refresh; | |
1569 | copy->soa.retry = rr->soa.retry; | |
1570 | copy->soa.expire = rr->soa.expire; | |
1571 | copy->soa.minimum = rr->soa.minimum; | |
1572 | break; | |
1573 | ||
1574 | case DNS_TYPE_MX: | |
1575 | copy->mx.priority = rr->mx.priority; | |
1576 | copy->mx.exchange = strdup(rr->mx.exchange); | |
1577 | if (!copy->mx.exchange) | |
1578 | return NULL; | |
1579 | break; | |
1580 | ||
1581 | case DNS_TYPE_LOC: | |
1582 | copy->loc = rr->loc; | |
1583 | break; | |
1584 | ||
1585 | case DNS_TYPE_SSHFP: | |
1586 | copy->sshfp.algorithm = rr->sshfp.algorithm; | |
1587 | copy->sshfp.fptype = rr->sshfp.fptype; | |
1588 | copy->sshfp.fingerprint = memdup(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); | |
1589 | if (!copy->sshfp.fingerprint) | |
1590 | return NULL; | |
1591 | copy->sshfp.fingerprint_size = rr->sshfp.fingerprint_size; | |
1592 | break; | |
1593 | ||
1594 | case DNS_TYPE_DNSKEY: | |
1595 | copy->dnskey.flags = rr->dnskey.flags; | |
1596 | copy->dnskey.protocol = rr->dnskey.protocol; | |
1597 | copy->dnskey.algorithm = rr->dnskey.algorithm; | |
1598 | copy->dnskey.key = memdup(rr->dnskey.key, rr->dnskey.key_size); | |
1599 | if (!copy->dnskey.key) | |
1600 | return NULL; | |
1601 | copy->dnskey.key_size = rr->dnskey.key_size; | |
1602 | break; | |
1603 | ||
1604 | case DNS_TYPE_RRSIG: | |
1605 | copy->rrsig.type_covered = rr->rrsig.type_covered; | |
1606 | copy->rrsig.algorithm = rr->rrsig.algorithm; | |
1607 | copy->rrsig.labels = rr->rrsig.labels; | |
1608 | copy->rrsig.original_ttl = rr->rrsig.original_ttl; | |
1609 | copy->rrsig.expiration = rr->rrsig.expiration; | |
1610 | copy->rrsig.inception = rr->rrsig.inception; | |
1611 | copy->rrsig.key_tag = rr->rrsig.key_tag; | |
1612 | copy->rrsig.signer = strdup(rr->rrsig.signer); | |
1613 | if (!copy->rrsig.signer) | |
1614 | return NULL; | |
1615 | copy->rrsig.signature = memdup(rr->rrsig.signature, rr->rrsig.signature_size); | |
1616 | if (!copy->rrsig.signature) | |
1617 | return NULL; | |
1618 | copy->rrsig.signature_size = rr->rrsig.signature_size; | |
1619 | break; | |
1620 | ||
1621 | case DNS_TYPE_NSEC: | |
1622 | copy->nsec.next_domain_name = strdup(rr->nsec.next_domain_name); | |
1623 | if (!copy->nsec.next_domain_name) | |
1624 | return NULL; | |
1625 | copy->nsec.types = bitmap_copy(rr->nsec.types); | |
1626 | if (!copy->nsec.types) | |
1627 | return NULL; | |
1628 | break; | |
1629 | ||
1630 | case DNS_TYPE_DS: | |
1631 | copy->ds.key_tag = rr->ds.key_tag; | |
1632 | copy->ds.algorithm = rr->ds.algorithm; | |
1633 | copy->ds.digest_type = rr->ds.digest_type; | |
1634 | copy->ds.digest = memdup(rr->ds.digest, rr->ds.digest_size); | |
1635 | if (!copy->ds.digest) | |
1636 | return NULL; | |
1637 | copy->ds.digest_size = rr->ds.digest_size; | |
1638 | break; | |
1639 | ||
1640 | case DNS_TYPE_NSEC3: | |
1641 | copy->nsec3.algorithm = rr->nsec3.algorithm; | |
1642 | copy->nsec3.flags = rr->nsec3.flags; | |
1643 | copy->nsec3.iterations = rr->nsec3.iterations; | |
1644 | copy->nsec3.salt = memdup(rr->nsec3.salt, rr->nsec3.salt_size); | |
1645 | if (!copy->nsec3.salt) | |
1646 | return NULL; | |
1647 | copy->nsec3.salt_size = rr->nsec3.salt_size; | |
1648 | copy->nsec3.next_hashed_name = memdup(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size); | |
a63a1252 | 1649 | if (!copy->nsec3.next_hashed_name) |
17c8de63 LP |
1650 | return NULL; |
1651 | copy->nsec3.next_hashed_name_size = rr->nsec3.next_hashed_name_size; | |
1652 | copy->nsec3.types = bitmap_copy(rr->nsec3.types); | |
1653 | if (!copy->nsec3.types) | |
1654 | return NULL; | |
1655 | break; | |
1656 | ||
1657 | case DNS_TYPE_TLSA: | |
1658 | copy->tlsa.cert_usage = rr->tlsa.cert_usage; | |
1659 | copy->tlsa.selector = rr->tlsa.selector; | |
1660 | copy->tlsa.matching_type = rr->tlsa.matching_type; | |
1661 | copy->tlsa.data = memdup(rr->tlsa.data, rr->tlsa.data_size); | |
1662 | if (!copy->tlsa.data) | |
1663 | return NULL; | |
1664 | copy->tlsa.data_size = rr->tlsa.data_size; | |
1665 | break; | |
1666 | ||
1667 | case DNS_TYPE_CAA: | |
1668 | copy->caa.flags = rr->caa.flags; | |
1669 | copy->caa.tag = strdup(rr->caa.tag); | |
1670 | if (!copy->caa.tag) | |
1671 | return NULL; | |
1672 | copy->caa.value = memdup(rr->caa.value, rr->caa.value_size); | |
1673 | if (!copy->caa.value) | |
1674 | return NULL; | |
1675 | copy->caa.value_size = rr->caa.value_size; | |
1676 | break; | |
1677 | ||
1678 | case DNS_TYPE_OPT: | |
1679 | default: | |
1680 | copy->generic.data = memdup(rr->generic.data, rr->generic.data_size); | |
1681 | if (!copy->generic.data) | |
1682 | return NULL; | |
1683 | copy->generic.data_size = rr->generic.data_size; | |
1684 | break; | |
1685 | } | |
1686 | ||
1cc6c93a | 1687 | t = TAKE_PTR(copy); |
17c8de63 LP |
1688 | |
1689 | return t; | |
1690 | } | |
1691 | ||
1692 | int dns_resource_record_clamp_ttl(DnsResourceRecord **rr, uint32_t max_ttl) { | |
1693 | DnsResourceRecord *old_rr, *new_rr; | |
1694 | uint32_t new_ttl; | |
1695 | ||
1696 | assert(rr); | |
1697 | old_rr = *rr; | |
1698 | ||
1699 | if (old_rr->key->type == DNS_TYPE_OPT) | |
1700 | return -EINVAL; | |
1701 | ||
1702 | new_ttl = MIN(old_rr->ttl, max_ttl); | |
1703 | if (new_ttl == old_rr->ttl) | |
1704 | return 0; | |
1705 | ||
1706 | if (old_rr->n_ref == 1) { | |
1707 | /* Patch in place */ | |
1708 | old_rr->ttl = new_ttl; | |
1709 | return 1; | |
1710 | } | |
1711 | ||
1712 | new_rr = dns_resource_record_copy(old_rr); | |
1713 | if (!new_rr) | |
1714 | return -ENOMEM; | |
1715 | ||
1716 | new_rr->ttl = new_ttl; | |
1717 | ||
1718 | dns_resource_record_unref(*rr); | |
1719 | *rr = new_rr; | |
1720 | ||
1721 | return 1; | |
1722 | } | |
1723 | ||
48662847 LP |
1724 | bool dns_resource_record_is_link_local_address(DnsResourceRecord *rr) { |
1725 | ||
1726 | if (rr->key->class != DNS_CLASS_IN) | |
1727 | return false; | |
1728 | ||
1729 | if (rr->key->type == DNS_TYPE_A) | |
1730 | return in4_addr_is_link_local(&rr->a.in_addr); | |
1731 | ||
1732 | if (rr->key->type == DNS_TYPE_AAAA) | |
1733 | return IN6_IS_ADDR_LINKLOCAL(&rr->aaaa.in6_addr); | |
1734 | ||
1735 | return false; | |
1736 | } | |
1737 | ||
2001c805 LP |
1738 | DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i) { |
1739 | DnsTxtItem *n; | |
1740 | ||
1741 | if (!i) | |
1742 | return NULL; | |
1743 | ||
1744 | n = i->items_next; | |
1745 | ||
1746 | free(i); | |
1747 | return dns_txt_item_free_all(n); | |
1748 | } | |
1749 | ||
1750 | bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) { | |
1751 | ||
4d247a6c LP |
1752 | if (a == b) |
1753 | return true; | |
1754 | ||
2001c805 LP |
1755 | if (!a != !b) |
1756 | return false; | |
1757 | ||
1758 | if (!a) | |
1759 | return true; | |
1760 | ||
1761 | if (a->length != b->length) | |
1762 | return false; | |
1763 | ||
1764 | if (memcmp(a->data, b->data, a->length) != 0) | |
1765 | return false; | |
1766 | ||
1767 | return dns_txt_item_equal(a->items_next, b->items_next); | |
1768 | } | |
8730bccf | 1769 | |
17c8de63 LP |
1770 | DnsTxtItem *dns_txt_item_copy(DnsTxtItem *first) { |
1771 | DnsTxtItem *i, *copy = NULL, *end = NULL; | |
1772 | ||
1773 | LIST_FOREACH(items, i, first) { | |
1774 | DnsTxtItem *j; | |
1775 | ||
1776 | j = memdup(i, offsetof(DnsTxtItem, data) + i->length + 1); | |
1777 | if (!j) { | |
1778 | dns_txt_item_free_all(copy); | |
1779 | return NULL; | |
1780 | } | |
1781 | ||
1782 | LIST_INSERT_AFTER(items, copy, end, j); | |
1783 | end = j; | |
1784 | } | |
1785 | ||
1786 | return copy; | |
1787 | } | |
1788 | ||
ebb779dc DR |
1789 | int dns_txt_item_new_empty(DnsTxtItem **ret) { |
1790 | DnsTxtItem *i; | |
1791 | ||
1792 | /* RFC 6763, section 6.1 suggests to treat | |
1793 | * empty TXT RRs as equivalent to a TXT record | |
1794 | * with a single empty string. */ | |
1795 | ||
1796 | i = malloc0(offsetof(DnsTxtItem, data) + 1); /* for safety reasons we add an extra NUL byte */ | |
1797 | if (!i) | |
1798 | return -ENOMEM; | |
1799 | ||
1800 | *ret = i; | |
1801 | ||
1802 | return 0; | |
1803 | } | |
1804 | ||
8730bccf | 1805 | static const char* const dnssec_algorithm_table[_DNSSEC_ALGORITHM_MAX_DEFINED] = { |
6f717d08 | 1806 | /* Mnemonics as listed on https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */ |
8730bccf LP |
1807 | [DNSSEC_ALGORITHM_RSAMD5] = "RSAMD5", |
1808 | [DNSSEC_ALGORITHM_DH] = "DH", | |
1809 | [DNSSEC_ALGORITHM_DSA] = "DSA", | |
1810 | [DNSSEC_ALGORITHM_ECC] = "ECC", | |
1811 | [DNSSEC_ALGORITHM_RSASHA1] = "RSASHA1", | |
1812 | [DNSSEC_ALGORITHM_DSA_NSEC3_SHA1] = "DSA-NSEC3-SHA1", | |
1813 | [DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1] = "RSASHA1-NSEC3-SHA1", | |
1814 | [DNSSEC_ALGORITHM_RSASHA256] = "RSASHA256", | |
1815 | [DNSSEC_ALGORITHM_RSASHA512] = "RSASHA512", | |
6f717d08 LP |
1816 | [DNSSEC_ALGORITHM_ECC_GOST] = "ECC-GOST", |
1817 | [DNSSEC_ALGORITHM_ECDSAP256SHA256] = "ECDSAP256SHA256", | |
1818 | [DNSSEC_ALGORITHM_ECDSAP384SHA384] = "ECDSAP384SHA384", | |
cb9eeb06 MCO |
1819 | [DNSSEC_ALGORITHM_ED25519] = "ED25519", |
1820 | [DNSSEC_ALGORITHM_ED448] = "ED448", | |
8730bccf LP |
1821 | [DNSSEC_ALGORITHM_INDIRECT] = "INDIRECT", |
1822 | [DNSSEC_ALGORITHM_PRIVATEDNS] = "PRIVATEDNS", | |
1823 | [DNSSEC_ALGORITHM_PRIVATEOID] = "PRIVATEOID", | |
1824 | }; | |
8e54f5d9 | 1825 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_algorithm, int, 255); |
8730bccf LP |
1826 | |
1827 | static const char* const dnssec_digest_table[_DNSSEC_DIGEST_MAX_DEFINED] = { | |
6f717d08 LP |
1828 | /* Names as listed on https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml */ |
1829 | [DNSSEC_DIGEST_SHA1] = "SHA-1", | |
1830 | [DNSSEC_DIGEST_SHA256] = "SHA-256", | |
1831 | [DNSSEC_DIGEST_GOST_R_34_11_94] = "GOST_R_34.11-94", | |
1832 | [DNSSEC_DIGEST_SHA384] = "SHA-384", | |
8730bccf | 1833 | }; |
8e54f5d9 | 1834 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_digest, int, 255); |