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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
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" |
fc8eec10 | 10 | #include "resolved-dns-dnssec.h" |
07630cea | 11 | #include "resolved-dns-packet.h" |
e4e73a63 | 12 | #include "resolved-dns-rr.h" |
8730bccf | 13 | #include "string-table.h" |
07630cea LP |
14 | #include "string-util.h" |
15 | #include "strv.h" | |
d7671a3e | 16 | #include "terminal-util.h" |
74b2466e | 17 | |
faa133f3 LP |
18 | DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) { |
19 | DnsResourceKey *k; | |
20 | size_t l; | |
74b2466e | 21 | |
faa133f3 LP |
22 | assert(name); |
23 | ||
24 | l = strlen(name); | |
25 | k = malloc0(sizeof(DnsResourceKey) + l + 1); | |
26 | if (!k) | |
27 | return NULL; | |
28 | ||
29 | k->n_ref = 1; | |
30 | k->class = class; | |
31 | k->type = type; | |
32 | ||
33 | strcpy((char*) k + sizeof(DnsResourceKey), name); | |
34 | ||
35 | return k; | |
36 | } | |
37 | ||
36d9205d | 38 | DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname) { |
58db254a LP |
39 | int r; |
40 | ||
36d9205d TG |
41 | assert(key); |
42 | assert(cname); | |
43 | ||
58db254a LP |
44 | assert(IN_SET(cname->key->type, DNS_TYPE_CNAME, DNS_TYPE_DNAME)); |
45 | ||
46 | if (cname->key->type == DNS_TYPE_CNAME) | |
47 | return dns_resource_key_new(key->class, key->type, cname->cname.name); | |
48 | else { | |
49 | DnsResourceKey *k; | |
50 | char *destination = NULL; | |
51 | ||
1c02e7ba | 52 | r = dns_name_change_suffix(dns_resource_key_name(key), dns_resource_key_name(cname->key), cname->dname.name, &destination); |
58db254a LP |
53 | if (r < 0) |
54 | return NULL; | |
55 | if (r == 0) | |
56 | return dns_resource_key_ref((DnsResourceKey*) key); | |
57 | ||
58 | k = dns_resource_key_new_consume(key->class, key->type, destination); | |
6b430fdb ZJS |
59 | if (!k) |
60 | return mfree(destination); | |
58db254a LP |
61 | |
62 | return k; | |
63 | } | |
36d9205d TG |
64 | } |
65 | ||
801ad6a6 LP |
66 | int dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name) { |
67 | DnsResourceKey *new_key; | |
68 | char *joined; | |
69 | int r; | |
70 | ||
71 | assert(ret); | |
72 | assert(key); | |
73 | assert(name); | |
74 | ||
dc477e73 | 75 | if (dns_name_is_root(name)) { |
801ad6a6 LP |
76 | *ret = dns_resource_key_ref(key); |
77 | return 0; | |
78 | } | |
79 | ||
1c02e7ba | 80 | r = dns_name_concat(dns_resource_key_name(key), name, &joined); |
801ad6a6 LP |
81 | if (r < 0) |
82 | return r; | |
83 | ||
84 | new_key = dns_resource_key_new_consume(key->class, key->type, joined); | |
85 | if (!new_key) { | |
86 | free(joined); | |
87 | return -ENOMEM; | |
88 | } | |
89 | ||
90 | *ret = new_key; | |
91 | return 0; | |
92 | } | |
93 | ||
faa133f3 LP |
94 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) { |
95 | DnsResourceKey *k; | |
96 | ||
97 | assert(name); | |
98 | ||
99 | k = new0(DnsResourceKey, 1); | |
100 | if (!k) | |
101 | return NULL; | |
102 | ||
103 | k->n_ref = 1; | |
104 | k->class = class; | |
105 | k->type = type; | |
106 | k->_name = name; | |
107 | ||
108 | return k; | |
109 | } | |
110 | ||
111 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) { | |
112 | ||
113 | if (!k) | |
114 | return NULL; | |
115 | ||
1b4f6e79 LP |
116 | /* Static/const keys created with DNS_RESOURCE_KEY_CONST will |
117 | * set this to -1, they should not be reffed/unreffed */ | |
118 | assert(k->n_ref != (unsigned) -1); | |
119 | ||
faa133f3 LP |
120 | assert(k->n_ref > 0); |
121 | k->n_ref++; | |
122 | ||
123 | return k; | |
124 | } | |
125 | ||
126 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) { | |
127 | if (!k) | |
128 | return NULL; | |
129 | ||
1b4f6e79 | 130 | assert(k->n_ref != (unsigned) -1); |
faa133f3 LP |
131 | assert(k->n_ref > 0); |
132 | ||
133 | if (k->n_ref == 1) { | |
134 | free(k->_name); | |
135 | free(k); | |
136 | } else | |
137 | k->n_ref--; | |
138 | ||
139 | return NULL; | |
140 | } | |
141 | ||
1c02e7ba ZJS |
142 | const char* dns_resource_key_name(const DnsResourceKey *key) { |
143 | const char *name; | |
144 | ||
145 | if (!key) | |
146 | return NULL; | |
147 | ||
148 | if (key->_name) | |
149 | name = key->_name; | |
150 | else | |
151 | name = (char*) key + sizeof(DnsResourceKey); | |
152 | ||
153 | if (dns_name_is_root(name)) | |
154 | return "."; | |
155 | else | |
156 | return name; | |
157 | } | |
158 | ||
28b9b764 LP |
159 | bool dns_resource_key_is_address(const DnsResourceKey *key) { |
160 | assert(key); | |
161 | ||
162 | /* Check if this is an A or AAAA resource key */ | |
163 | ||
164 | return key->class == DNS_CLASS_IN && IN_SET(key->type, DNS_TYPE_A, DNS_TYPE_AAAA); | |
165 | } | |
166 | ||
a2bf8a19 DR |
167 | bool dns_resource_key_is_dnssd_ptr(const DnsResourceKey *key) { |
168 | assert(key); | |
169 | ||
170 | /* Check if this is a PTR resource key used in | |
171 | Service Instance Enumeration as described in RFC6763 p4.1. */ | |
172 | ||
173 | if (key->type != DNS_TYPE_PTR) | |
174 | return false; | |
175 | ||
176 | return dns_name_endswith(dns_resource_key_name(key), "_tcp.local") || | |
177 | dns_name_endswith(dns_resource_key_name(key), "_udp.local"); | |
178 | } | |
179 | ||
faa133f3 LP |
180 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) { |
181 | int r; | |
182 | ||
4d247a6c LP |
183 | if (a == b) |
184 | return 1; | |
185 | ||
1c02e7ba | 186 | r = dns_name_equal(dns_resource_key_name(a), dns_resource_key_name(b)); |
faa133f3 LP |
187 | if (r <= 0) |
188 | return r; | |
189 | ||
190 | if (a->class != b->class) | |
191 | return 0; | |
192 | ||
193 | if (a->type != b->type) | |
194 | return 0; | |
195 | ||
196 | return 1; | |
197 | } | |
198 | ||
105e1512 | 199 | int dns_resource_key_match_rr(const DnsResourceKey *key, DnsResourceRecord *rr, const char *search_domain) { |
801ad6a6 LP |
200 | int r; |
201 | ||
faa133f3 LP |
202 | assert(key); |
203 | assert(rr); | |
204 | ||
4d247a6c LP |
205 | if (key == rr->key) |
206 | return 1; | |
207 | ||
801ad6a6 LP |
208 | /* Checks if an rr matches the specified key. If a search |
209 | * domain is specified, it will also be checked if the key | |
210 | * with the search domain suffixed might match the RR. */ | |
211 | ||
faa133f3 LP |
212 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) |
213 | return 0; | |
214 | ||
215 | if (rr->key->type != key->type && key->type != DNS_TYPE_ANY) | |
216 | return 0; | |
217 | ||
1c02e7ba | 218 | r = dns_name_equal(dns_resource_key_name(rr->key), dns_resource_key_name(key)); |
801ad6a6 LP |
219 | if (r != 0) |
220 | return r; | |
221 | ||
222 | if (search_domain) { | |
223 | _cleanup_free_ char *joined = NULL; | |
224 | ||
1c02e7ba | 225 | r = dns_name_concat(dns_resource_key_name(key), search_domain, &joined); |
801ad6a6 LP |
226 | if (r < 0) |
227 | return r; | |
228 | ||
1c02e7ba | 229 | return dns_name_equal(dns_resource_key_name(rr->key), joined); |
801ad6a6 LP |
230 | } |
231 | ||
232 | return 0; | |
faa133f3 LP |
233 | } |
234 | ||
5d27351f | 235 | int dns_resource_key_match_cname_or_dname(const DnsResourceKey *key, const DnsResourceKey *cname, const char *search_domain) { |
801ad6a6 LP |
236 | int r; |
237 | ||
faa133f3 | 238 | assert(key); |
5d27351f | 239 | assert(cname); |
faa133f3 | 240 | |
5d27351f | 241 | if (cname->class != key->class && key->class != DNS_CLASS_ANY) |
faa133f3 LP |
242 | return 0; |
243 | ||
5d27351f | 244 | if (cname->type == DNS_TYPE_CNAME) |
1c02e7ba | 245 | r = dns_name_equal(dns_resource_key_name(key), dns_resource_key_name(cname)); |
5d27351f | 246 | else if (cname->type == DNS_TYPE_DNAME) |
1c02e7ba | 247 | r = dns_name_endswith(dns_resource_key_name(key), dns_resource_key_name(cname)); |
58db254a | 248 | else |
faa133f3 | 249 | return 0; |
801ad6a6 LP |
250 | |
251 | if (r != 0) | |
252 | return r; | |
253 | ||
254 | if (search_domain) { | |
255 | _cleanup_free_ char *joined = NULL; | |
256 | ||
1c02e7ba | 257 | r = dns_name_concat(dns_resource_key_name(key), search_domain, &joined); |
801ad6a6 LP |
258 | if (r < 0) |
259 | return r; | |
260 | ||
5d27351f | 261 | if (cname->type == DNS_TYPE_CNAME) |
1c02e7ba | 262 | return dns_name_equal(joined, dns_resource_key_name(cname)); |
5d27351f | 263 | else if (cname->type == DNS_TYPE_DNAME) |
1c02e7ba | 264 | return dns_name_endswith(joined, dns_resource_key_name(cname)); |
801ad6a6 LP |
265 | } |
266 | ||
267 | return 0; | |
547973de LP |
268 | } |
269 | ||
270 | int dns_resource_key_match_soa(const DnsResourceKey *key, const DnsResourceKey *soa) { | |
271 | assert(soa); | |
272 | assert(key); | |
273 | ||
274 | /* Checks whether 'soa' is a SOA record for the specified key. */ | |
275 | ||
65b200e7 | 276 | if (soa->class != key->class) |
547973de | 277 | return 0; |
801ad6a6 | 278 | |
547973de LP |
279 | if (soa->type != DNS_TYPE_SOA) |
280 | return 0; | |
281 | ||
1c02e7ba | 282 | return dns_name_endswith(dns_resource_key_name(key), dns_resource_key_name(soa)); |
74b2466e LP |
283 | } |
284 | ||
7a08d314 | 285 | static void dns_resource_key_hash_func(const DnsResourceKey *k, struct siphash *state) { |
b826ab58 | 286 | assert(k); |
322345fd | 287 | |
1c02e7ba | 288 | dns_name_hash_func(dns_resource_key_name(k), state); |
b826ab58 TG |
289 | siphash24_compress(&k->class, sizeof(k->class), state); |
290 | siphash24_compress(&k->type, sizeof(k->type), state); | |
322345fd LP |
291 | } |
292 | ||
7a08d314 | 293 | static int dns_resource_key_compare_func(const DnsResourceKey *x, const DnsResourceKey *y) { |
322345fd LP |
294 | int ret; |
295 | ||
1c02e7ba | 296 | ret = dns_name_compare_func(dns_resource_key_name(x), dns_resource_key_name(y)); |
322345fd LP |
297 | if (ret != 0) |
298 | return ret; | |
299 | ||
a0edd02e FB |
300 | ret = CMP(x->type, y->type); |
301 | if (ret != 0) | |
302 | return ret; | |
322345fd | 303 | |
a0edd02e FB |
304 | ret = CMP(x->class, y->class); |
305 | if (ret != 0) | |
306 | return ret; | |
322345fd LP |
307 | |
308 | return 0; | |
309 | } | |
310 | ||
7a08d314 | 311 | DEFINE_HASH_OPS(dns_resource_key_hash_ops, DnsResourceKey, dns_resource_key_hash_func, dns_resource_key_compare_func); |
d5099efc | 312 | |
202b76ae | 313 | char* dns_resource_key_to_string(const DnsResourceKey *key, char *buf, size_t buf_size) { |
1c02e7ba | 314 | const char *c, *t; |
202b76ae | 315 | char *ans = buf; |
2d4c5cbc | 316 | |
6af47493 LP |
317 | /* If we cannot convert the CLASS/TYPE into a known string, |
318 | use the format recommended by RFC 3597, Section 5. */ | |
319 | ||
2d4c5cbc | 320 | c = dns_class_to_string(key->class); |
2d4c5cbc | 321 | t = dns_type_to_string(key->type); |
2d4c5cbc | 322 | |
202b76ae ZJS |
323 | snprintf(buf, buf_size, "%s %s%s%.0u %s%s%.0u", |
324 | dns_resource_key_name(key), | |
87e4e28d | 325 | strempty(c), c ? "" : "CLASS", c ? 0 : key->class, |
d149a404 | 326 | strempty(t), t ? "" : "TYPE", t ? 0 : key->type); |
2d4c5cbc | 327 | |
202b76ae | 328 | return ans; |
2d4c5cbc LP |
329 | } |
330 | ||
f57e3cd5 LP |
331 | bool dns_resource_key_reduce(DnsResourceKey **a, DnsResourceKey **b) { |
332 | assert(a); | |
333 | assert(b); | |
334 | ||
335 | /* Try to replace one RR key by another if they are identical, thus saving a bit of memory. Note that we do | |
336 | * this only for RR keys, not for RRs themselves, as they carry a lot of additional metadata (where they come | |
337 | * from, validity data, and suchlike), and cannot be replaced so easily by other RRs that have the same | |
338 | * superficial data. */ | |
339 | ||
340 | if (!*a) | |
341 | return false; | |
342 | if (!*b) | |
343 | return false; | |
344 | ||
345 | /* We refuse merging const keys */ | |
346 | if ((*a)->n_ref == (unsigned) -1) | |
347 | return false; | |
348 | if ((*b)->n_ref == (unsigned) -1) | |
349 | return false; | |
350 | ||
351 | /* Already the same? */ | |
352 | if (*a == *b) | |
353 | return true; | |
354 | ||
355 | /* Are they really identical? */ | |
356 | if (dns_resource_key_equal(*a, *b) <= 0) | |
357 | return false; | |
358 | ||
359 | /* Keep the one which already has more references. */ | |
360 | if ((*a)->n_ref > (*b)->n_ref) { | |
361 | dns_resource_key_unref(*b); | |
362 | *b = dns_resource_key_ref(*a); | |
363 | } else { | |
364 | dns_resource_key_unref(*a); | |
365 | *a = dns_resource_key_ref(*b); | |
366 | } | |
367 | ||
368 | return true; | |
369 | } | |
370 | ||
faa133f3 | 371 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { |
74b2466e LP |
372 | DnsResourceRecord *rr; |
373 | ||
374 | rr = new0(DnsResourceRecord, 1); | |
375 | if (!rr) | |
376 | return NULL; | |
377 | ||
378 | rr->n_ref = 1; | |
faa133f3 | 379 | rr->key = dns_resource_key_ref(key); |
ee3d6aff | 380 | rr->expiry = USEC_INFINITY; |
97c67192 | 381 | rr->n_skip_labels_signer = rr->n_skip_labels_source = (unsigned) -1; |
faa133f3 | 382 | |
74b2466e LP |
383 | return rr; |
384 | } | |
385 | ||
8bf52d3d LP |
386 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) { |
387 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
388 | ||
389 | key = dns_resource_key_new(class, type, name); | |
390 | if (!key) | |
391 | return NULL; | |
392 | ||
393 | return dns_resource_record_new(key); | |
394 | } | |
395 | ||
8301aa0b YW |
396 | static DnsResourceRecord* dns_resource_record_free(DnsResourceRecord *rr) { |
397 | assert(rr); | |
74b2466e | 398 | |
faa133f3 | 399 | if (rr->key) { |
9de3e329 | 400 | switch(rr->key->type) { |
9c92ce6d LP |
401 | |
402 | case DNS_TYPE_SRV: | |
403 | free(rr->srv.name); | |
404 | break; | |
405 | ||
9de3e329 ZJS |
406 | case DNS_TYPE_PTR: |
407 | case DNS_TYPE_NS: | |
408 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 409 | case DNS_TYPE_DNAME: |
faa133f3 | 410 | free(rr->ptr.name); |
9de3e329 | 411 | break; |
9c92ce6d | 412 | |
9de3e329 | 413 | case DNS_TYPE_HINFO: |
faa133f3 LP |
414 | free(rr->hinfo.cpu); |
415 | free(rr->hinfo.os); | |
9de3e329 | 416 | break; |
9c92ce6d | 417 | |
9de3e329 | 418 | case DNS_TYPE_TXT: |
9c92ce6d | 419 | case DNS_TYPE_SPF: |
2001c805 | 420 | dns_txt_item_free_all(rr->txt.items); |
9de3e329 | 421 | break; |
9c92ce6d | 422 | |
9de3e329 | 423 | case DNS_TYPE_SOA: |
7e8e0422 LP |
424 | free(rr->soa.mname); |
425 | free(rr->soa.rname); | |
9de3e329 | 426 | break; |
9c92ce6d | 427 | |
9de3e329 | 428 | case DNS_TYPE_MX: |
946c7094 | 429 | free(rr->mx.exchange); |
9de3e329 | 430 | break; |
9c92ce6d | 431 | |
abf126a3 TG |
432 | case DNS_TYPE_DS: |
433 | free(rr->ds.digest); | |
434 | break; | |
435 | ||
42cc2eeb | 436 | case DNS_TYPE_SSHFP: |
549c1a25 | 437 | free(rr->sshfp.fingerprint); |
42cc2eeb LP |
438 | break; |
439 | ||
8db0d2f5 ZJS |
440 | case DNS_TYPE_DNSKEY: |
441 | free(rr->dnskey.key); | |
442 | break; | |
443 | ||
151226ab ZJS |
444 | case DNS_TYPE_RRSIG: |
445 | free(rr->rrsig.signer); | |
446 | free(rr->rrsig.signature); | |
447 | break; | |
448 | ||
50f1e641 TG |
449 | case DNS_TYPE_NSEC: |
450 | free(rr->nsec.next_domain_name); | |
451 | bitmap_free(rr->nsec.types); | |
452 | break; | |
453 | ||
5d45a880 TG |
454 | case DNS_TYPE_NSEC3: |
455 | free(rr->nsec3.next_hashed_name); | |
456 | free(rr->nsec3.salt); | |
457 | bitmap_free(rr->nsec3.types); | |
458 | break; | |
459 | ||
0dae31d4 | 460 | case DNS_TYPE_LOC: |
9de3e329 ZJS |
461 | case DNS_TYPE_A: |
462 | case DNS_TYPE_AAAA: | |
463 | break; | |
9c92ce6d | 464 | |
48d45d2b ZJS |
465 | case DNS_TYPE_TLSA: |
466 | free(rr->tlsa.data); | |
467 | break; | |
468 | ||
95052df3 ZJS |
469 | case DNS_TYPE_CAA: |
470 | free(rr->caa.tag); | |
471 | free(rr->caa.value); | |
472 | break; | |
473 | ||
d93a16b8 | 474 | case DNS_TYPE_OPENPGPKEY: |
9de3e329 | 475 | default: |
bfc1d734 ZJS |
476 | if (!rr->unparseable) |
477 | free(rr->generic.data); | |
9de3e329 | 478 | } |
322345fd | 479 | |
bfc1d734 ZJS |
480 | if (rr->unparseable) |
481 | free(rr->generic.data); | |
482 | ||
a8812dd7 | 483 | free(rr->wire_format); |
faa133f3 LP |
484 | dns_resource_key_unref(rr->key); |
485 | } | |
322345fd | 486 | |
7b50eb2e | 487 | free(rr->to_string); |
6b430fdb | 488 | return mfree(rr); |
322345fd LP |
489 | } |
490 | ||
8301aa0b YW |
491 | DEFINE_TRIVIAL_REF_UNREF_FUNC(DnsResourceRecord, dns_resource_record, dns_resource_record_free); |
492 | ||
623a4c97 LP |
493 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) { |
494 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
495 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; | |
496 | _cleanup_free_ char *ptr = NULL; | |
497 | int r; | |
498 | ||
499 | assert(ret); | |
500 | assert(address); | |
501 | assert(hostname); | |
502 | ||
503 | r = dns_name_reverse(family, address, &ptr); | |
504 | if (r < 0) | |
505 | return r; | |
506 | ||
507 | key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr); | |
508 | if (!key) | |
509 | return -ENOMEM; | |
510 | ||
511 | ptr = NULL; | |
512 | ||
513 | rr = dns_resource_record_new(key); | |
514 | if (!rr) | |
515 | return -ENOMEM; | |
516 | ||
517 | rr->ptr.name = strdup(hostname); | |
518 | if (!rr->ptr.name) | |
519 | return -ENOMEM; | |
520 | ||
1cc6c93a | 521 | *ret = TAKE_PTR(rr); |
623a4c97 LP |
522 | |
523 | return 0; | |
524 | } | |
525 | ||
78c6a153 LP |
526 | int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name) { |
527 | DnsResourceRecord *rr; | |
528 | ||
529 | assert(ret); | |
530 | assert(address); | |
531 | assert(family); | |
532 | ||
533 | if (family == AF_INET) { | |
534 | ||
535 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, name); | |
536 | if (!rr) | |
537 | return -ENOMEM; | |
538 | ||
539 | rr->a.in_addr = address->in; | |
540 | ||
541 | } else if (family == AF_INET6) { | |
542 | ||
543 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, name); | |
544 | if (!rr) | |
545 | return -ENOMEM; | |
546 | ||
547 | rr->aaaa.in6_addr = address->in6; | |
548 | } else | |
549 | return -EAFNOSUPPORT; | |
550 | ||
551 | *ret = rr; | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
a43a068a ZJS |
556 | #define FIELD_EQUAL(a, b, field) \ |
557 | ((a).field ## _size == (b).field ## _size && \ | |
558 | memcmp((a).field, (b).field, (a).field ## _size) == 0) | |
559 | ||
322345fd LP |
560 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { |
561 | int r; | |
562 | ||
563 | assert(a); | |
564 | assert(b); | |
565 | ||
4d247a6c LP |
566 | if (a == b) |
567 | return 1; | |
568 | ||
faa133f3 | 569 | r = dns_resource_key_equal(a->key, b->key); |
322345fd LP |
570 | if (r <= 0) |
571 | return r; | |
572 | ||
fd0b4602 LP |
573 | if (a->unparseable != b->unparseable) |
574 | return 0; | |
575 | ||
576 | switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) { | |
2d4c5cbc | 577 | |
9c92ce6d LP |
578 | case DNS_TYPE_SRV: |
579 | r = dns_name_equal(a->srv.name, b->srv.name); | |
580 | if (r <= 0) | |
581 | return r; | |
582 | ||
583 | return a->srv.priority == b->srv.priority && | |
584 | a->srv.weight == b->srv.weight && | |
585 | a->srv.port == b->srv.port; | |
586 | ||
2d4c5cbc LP |
587 | case DNS_TYPE_PTR: |
588 | case DNS_TYPE_NS: | |
589 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 590 | case DNS_TYPE_DNAME: |
322345fd | 591 | return dns_name_equal(a->ptr.name, b->ptr.name); |
2d4c5cbc LP |
592 | |
593 | case DNS_TYPE_HINFO: | |
594 | return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && | |
595 | strcaseeq(a->hinfo.os, b->hinfo.os); | |
596 | ||
9de3e329 | 597 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
0f84a72e | 598 | case DNS_TYPE_TXT: |
2001c805 | 599 | return dns_txt_item_equal(a->txt.items, b->txt.items); |
2e276efc | 600 | |
2d4c5cbc | 601 | case DNS_TYPE_A: |
322345fd | 602 | return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; |
2d4c5cbc LP |
603 | |
604 | case DNS_TYPE_AAAA: | |
322345fd | 605 | return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; |
2d4c5cbc LP |
606 | |
607 | case DNS_TYPE_SOA: | |
7e8e0422 LP |
608 | r = dns_name_equal(a->soa.mname, b->soa.mname); |
609 | if (r <= 0) | |
610 | return r; | |
611 | r = dns_name_equal(a->soa.rname, b->soa.rname); | |
612 | if (r <= 0) | |
613 | return r; | |
614 | ||
615 | return a->soa.serial == b->soa.serial && | |
616 | a->soa.refresh == b->soa.refresh && | |
617 | a->soa.retry == b->soa.retry && | |
618 | a->soa.expire == b->soa.expire && | |
619 | a->soa.minimum == b->soa.minimum; | |
9c92ce6d | 620 | |
946c7094 ZJS |
621 | case DNS_TYPE_MX: |
622 | if (a->mx.priority != b->mx.priority) | |
623 | return 0; | |
624 | ||
625 | return dns_name_equal(a->mx.exchange, b->mx.exchange); | |
626 | ||
0dae31d4 ZJS |
627 | case DNS_TYPE_LOC: |
628 | assert(a->loc.version == b->loc.version); | |
629 | ||
630 | return a->loc.size == b->loc.size && | |
631 | a->loc.horiz_pre == b->loc.horiz_pre && | |
632 | a->loc.vert_pre == b->loc.vert_pre && | |
633 | a->loc.latitude == b->loc.latitude && | |
634 | a->loc.longitude == b->loc.longitude && | |
635 | a->loc.altitude == b->loc.altitude; | |
636 | ||
abf126a3 TG |
637 | case DNS_TYPE_DS: |
638 | return a->ds.key_tag == b->ds.key_tag && | |
639 | a->ds.algorithm == b->ds.algorithm && | |
640 | a->ds.digest_type == b->ds.digest_type && | |
a43a068a | 641 | FIELD_EQUAL(a->ds, b->ds, digest); |
abf126a3 | 642 | |
42cc2eeb LP |
643 | case DNS_TYPE_SSHFP: |
644 | return a->sshfp.algorithm == b->sshfp.algorithm && | |
645 | a->sshfp.fptype == b->sshfp.fptype && | |
a43a068a | 646 | FIELD_EQUAL(a->sshfp, b->sshfp, fingerprint); |
42cc2eeb | 647 | |
8db0d2f5 | 648 | case DNS_TYPE_DNSKEY: |
f91dc240 LP |
649 | return a->dnskey.flags == b->dnskey.flags && |
650 | a->dnskey.protocol == b->dnskey.protocol && | |
8db0d2f5 | 651 | a->dnskey.algorithm == b->dnskey.algorithm && |
a43a068a | 652 | FIELD_EQUAL(a->dnskey, b->dnskey, key); |
8db0d2f5 | 653 | |
151226ab ZJS |
654 | case DNS_TYPE_RRSIG: |
655 | /* do the fast comparisons first */ | |
a43a068a ZJS |
656 | return a->rrsig.type_covered == b->rrsig.type_covered && |
657 | a->rrsig.algorithm == b->rrsig.algorithm && | |
658 | a->rrsig.labels == b->rrsig.labels && | |
659 | a->rrsig.original_ttl == b->rrsig.original_ttl && | |
660 | a->rrsig.expiration == b->rrsig.expiration && | |
661 | a->rrsig.inception == b->rrsig.inception && | |
662 | a->rrsig.key_tag == b->rrsig.key_tag && | |
663 | FIELD_EQUAL(a->rrsig, b->rrsig, signature) && | |
664 | dns_name_equal(a->rrsig.signer, b->rrsig.signer); | |
151226ab | 665 | |
50f1e641 TG |
666 | case DNS_TYPE_NSEC: |
667 | return dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name) && | |
668 | bitmap_equal(a->nsec.types, b->nsec.types); | |
669 | ||
5d45a880 TG |
670 | case DNS_TYPE_NSEC3: |
671 | return a->nsec3.algorithm == b->nsec3.algorithm && | |
a43a068a ZJS |
672 | a->nsec3.flags == b->nsec3.flags && |
673 | a->nsec3.iterations == b->nsec3.iterations && | |
674 | FIELD_EQUAL(a->nsec3, b->nsec3, salt) && | |
675 | FIELD_EQUAL(a->nsec3, b->nsec3, next_hashed_name) && | |
676 | bitmap_equal(a->nsec3.types, b->nsec3.types); | |
5d45a880 | 677 | |
48d45d2b ZJS |
678 | case DNS_TYPE_TLSA: |
679 | return a->tlsa.cert_usage == b->tlsa.cert_usage && | |
680 | a->tlsa.selector == b->tlsa.selector && | |
681 | a->tlsa.matching_type == b->tlsa.matching_type && | |
a43a068a | 682 | FIELD_EQUAL(a->tlsa, b->tlsa, data); |
48d45d2b | 683 | |
95052df3 ZJS |
684 | case DNS_TYPE_CAA: |
685 | return a->caa.flags == b->caa.flags && | |
686 | streq(a->caa.tag, b->caa.tag) && | |
687 | FIELD_EQUAL(a->caa, b->caa, value); | |
688 | ||
689 | case DNS_TYPE_OPENPGPKEY: | |
2d4c5cbc | 690 | default: |
a43a068a | 691 | return FIELD_EQUAL(a->generic, b->generic, data); |
2d4c5cbc | 692 | } |
322345fd LP |
693 | } |
694 | ||
0dae31d4 ZJS |
695 | static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude, |
696 | uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) { | |
697 | char *s; | |
698 | char NS = latitude >= 1U<<31 ? 'N' : 'S'; | |
699 | char EW = longitude >= 1U<<31 ? 'E' : 'W'; | |
700 | ||
701 | int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude); | |
702 | int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude); | |
703 | double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude); | |
704 | double siz = (size >> 4) * exp10((double) (size & 0xF)); | |
705 | double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF)); | |
706 | double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF)); | |
707 | ||
708 | if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm", | |
709 | (lat / 60000 / 60), | |
710 | (lat / 60000) % 60, | |
711 | (lat % 60000) / 1000., | |
712 | NS, | |
713 | (lon / 60000 / 60), | |
714 | (lon / 60000) % 60, | |
715 | (lon % 60000) / 1000., | |
716 | EW, | |
717 | alt / 100., | |
718 | siz / 100., | |
719 | hor / 100., | |
720 | ver / 100.) < 0) | |
721 | return NULL; | |
722 | ||
723 | return s; | |
724 | } | |
725 | ||
7c6423e1 TG |
726 | static int format_timestamp_dns(char *buf, size_t l, time_t sec) { |
727 | struct tm tm; | |
728 | ||
729 | assert(buf); | |
fbd0b64f | 730 | assert(l > STRLEN("YYYYMMDDHHmmSS")); |
7c6423e1 TG |
731 | |
732 | if (!gmtime_r(&sec, &tm)) | |
733 | return -EINVAL; | |
734 | ||
735 | if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0) | |
736 | return -EINVAL; | |
737 | ||
738 | return 0; | |
739 | } | |
740 | ||
50f1e641 TG |
741 | static char *format_types(Bitmap *types) { |
742 | _cleanup_strv_free_ char **strv = NULL; | |
743 | _cleanup_free_ char *str = NULL; | |
cb57dd41 | 744 | Iterator i; |
50f1e641 TG |
745 | unsigned type; |
746 | int r; | |
747 | ||
cb57dd41 | 748 | BITMAP_FOREACH(type, types, i) { |
50f1e641 | 749 | if (dns_type_to_string(type)) { |
2c1fb4f7 | 750 | r = strv_extend(&strv, dns_type_to_string(type)); |
50f1e641 TG |
751 | if (r < 0) |
752 | return NULL; | |
753 | } else { | |
754 | char *t; | |
755 | ||
756 | r = asprintf(&t, "TYPE%u", type); | |
757 | if (r < 0) | |
758 | return NULL; | |
759 | ||
2c1fb4f7 | 760 | r = strv_consume(&strv, t); |
50f1e641 TG |
761 | if (r < 0) |
762 | return NULL; | |
763 | } | |
764 | } | |
765 | ||
766 | str = strv_join(strv, " "); | |
767 | if (!str) | |
768 | return NULL; | |
769 | ||
605405c6 | 770 | return strjoin("( ", str, " )"); |
50f1e641 TG |
771 | } |
772 | ||
2001c805 LP |
773 | static char *format_txt(DnsTxtItem *first) { |
774 | DnsTxtItem *i; | |
775 | size_t c = 1; | |
776 | char *p, *s; | |
777 | ||
778 | LIST_FOREACH(items, i, first) | |
779 | c += i->length * 4 + 3; | |
780 | ||
781 | p = s = new(char, c); | |
782 | if (!s) | |
783 | return NULL; | |
784 | ||
785 | LIST_FOREACH(items, i, first) { | |
786 | size_t j; | |
787 | ||
788 | if (i != first) | |
789 | *(p++) = ' '; | |
790 | ||
791 | *(p++) = '"'; | |
792 | ||
793 | for (j = 0; j < i->length; j++) { | |
794 | if (i->data[j] < ' ' || i->data[j] == '"' || i->data[j] >= 127) { | |
795 | *(p++) = '\\'; | |
796 | *(p++) = '0' + (i->data[j] / 100); | |
797 | *(p++) = '0' + ((i->data[j] / 10) % 10); | |
798 | *(p++) = '0' + (i->data[j] % 10); | |
799 | } else | |
800 | *(p++) = i->data[j]; | |
801 | } | |
802 | ||
803 | *(p++) = '"'; | |
804 | } | |
805 | ||
806 | *p = 0; | |
807 | return s; | |
808 | } | |
809 | ||
7b50eb2e | 810 | const char *dns_resource_record_to_string(DnsResourceRecord *rr) { |
202b76ae ZJS |
811 | _cleanup_free_ char *t = NULL; |
812 | char *s, k[DNS_RESOURCE_KEY_STRING_MAX]; | |
2d4c5cbc | 813 | int r; |
322345fd | 814 | |
2d4c5cbc | 815 | assert(rr); |
322345fd | 816 | |
7b50eb2e LP |
817 | if (rr->to_string) |
818 | return rr->to_string; | |
819 | ||
202b76ae | 820 | dns_resource_key_to_string(rr->key, k, sizeof(k)); |
322345fd | 821 | |
0dae31d4 | 822 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { |
322345fd | 823 | |
9c92ce6d LP |
824 | case DNS_TYPE_SRV: |
825 | r = asprintf(&s, "%s %u %u %u %s", | |
826 | k, | |
827 | rr->srv.priority, | |
828 | rr->srv.weight, | |
829 | rr->srv.port, | |
830 | strna(rr->srv.name)); | |
831 | if (r < 0) | |
7b50eb2e | 832 | return NULL; |
9c92ce6d LP |
833 | break; |
834 | ||
2d4c5cbc LP |
835 | case DNS_TYPE_PTR: |
836 | case DNS_TYPE_NS: | |
837 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 838 | case DNS_TYPE_DNAME: |
605405c6 | 839 | s = strjoin(k, " ", rr->ptr.name); |
2d4c5cbc | 840 | if (!s) |
7b50eb2e | 841 | return NULL; |
322345fd | 842 | |
2d4c5cbc | 843 | break; |
322345fd | 844 | |
2d4c5cbc | 845 | case DNS_TYPE_HINFO: |
605405c6 | 846 | s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os); |
2d4c5cbc | 847 | if (!s) |
7b50eb2e | 848 | return NULL; |
2d4c5cbc | 849 | break; |
322345fd | 850 | |
9de3e329 | 851 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
8db0d2f5 | 852 | case DNS_TYPE_TXT: |
2001c805 | 853 | t = format_txt(rr->txt.items); |
2e276efc | 854 | if (!t) |
7b50eb2e | 855 | return NULL; |
2e276efc | 856 | |
605405c6 | 857 | s = strjoin(k, " ", t); |
2e276efc | 858 | if (!s) |
7b50eb2e | 859 | return NULL; |
2e276efc | 860 | break; |
2e276efc | 861 | |
2d4c5cbc LP |
862 | case DNS_TYPE_A: { |
863 | _cleanup_free_ char *x = NULL; | |
322345fd | 864 | |
2d4c5cbc LP |
865 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x); |
866 | if (r < 0) | |
7b50eb2e | 867 | return NULL; |
322345fd | 868 | |
605405c6 | 869 | s = strjoin(k, " ", x); |
2d4c5cbc | 870 | if (!s) |
7b50eb2e | 871 | return NULL; |
2d4c5cbc LP |
872 | break; |
873 | } | |
322345fd | 874 | |
8db0d2f5 ZJS |
875 | case DNS_TYPE_AAAA: |
876 | r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); | |
2d4c5cbc | 877 | if (r < 0) |
7b50eb2e | 878 | return NULL; |
322345fd | 879 | |
605405c6 | 880 | s = strjoin(k, " ", t); |
2d4c5cbc | 881 | if (!s) |
7b50eb2e | 882 | return NULL; |
2d4c5cbc | 883 | break; |
322345fd | 884 | |
2d4c5cbc LP |
885 | case DNS_TYPE_SOA: |
886 | r = asprintf(&s, "%s %s %s %u %u %u %u %u", | |
887 | k, | |
888 | strna(rr->soa.mname), | |
889 | strna(rr->soa.rname), | |
890 | rr->soa.serial, | |
891 | rr->soa.refresh, | |
892 | rr->soa.retry, | |
893 | rr->soa.expire, | |
894 | rr->soa.minimum); | |
895 | if (r < 0) | |
7b50eb2e | 896 | return NULL; |
2d4c5cbc LP |
897 | break; |
898 | ||
946c7094 ZJS |
899 | case DNS_TYPE_MX: |
900 | r = asprintf(&s, "%s %u %s", | |
901 | k, | |
902 | rr->mx.priority, | |
903 | rr->mx.exchange); | |
904 | if (r < 0) | |
7b50eb2e | 905 | return NULL; |
946c7094 ZJS |
906 | break; |
907 | ||
8db0d2f5 | 908 | case DNS_TYPE_LOC: |
0dae31d4 ZJS |
909 | assert(rr->loc.version == 0); |
910 | ||
8db0d2f5 ZJS |
911 | t = format_location(rr->loc.latitude, |
912 | rr->loc.longitude, | |
913 | rr->loc.altitude, | |
914 | rr->loc.size, | |
915 | rr->loc.horiz_pre, | |
916 | rr->loc.vert_pre); | |
917 | if (!t) | |
7b50eb2e | 918 | return NULL; |
0dae31d4 | 919 | |
605405c6 | 920 | s = strjoin(k, " ", t); |
0dae31d4 | 921 | if (!s) |
7b50eb2e | 922 | return NULL; |
0dae31d4 | 923 | break; |
0dae31d4 | 924 | |
abf126a3 TG |
925 | case DNS_TYPE_DS: |
926 | t = hexmem(rr->ds.digest, rr->ds.digest_size); | |
927 | if (!t) | |
7b50eb2e | 928 | return NULL; |
abf126a3 TG |
929 | |
930 | r = asprintf(&s, "%s %u %u %u %s", | |
931 | k, | |
932 | rr->ds.key_tag, | |
933 | rr->ds.algorithm, | |
934 | rr->ds.digest_type, | |
935 | t); | |
936 | if (r < 0) | |
7b50eb2e | 937 | return NULL; |
abf126a3 TG |
938 | break; |
939 | ||
8db0d2f5 | 940 | case DNS_TYPE_SSHFP: |
549c1a25 | 941 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); |
8db0d2f5 | 942 | if (!t) |
7b50eb2e | 943 | return NULL; |
42cc2eeb LP |
944 | |
945 | r = asprintf(&s, "%s %u %u %s", | |
946 | k, | |
947 | rr->sshfp.algorithm, | |
948 | rr->sshfp.fptype, | |
8db0d2f5 | 949 | t); |
42cc2eeb | 950 | if (r < 0) |
7b50eb2e | 951 | return NULL; |
42cc2eeb | 952 | break; |
42cc2eeb | 953 | |
ff3d6560 | 954 | case DNS_TYPE_DNSKEY: { |
8e54f5d9 | 955 | _cleanup_free_ char *alg = NULL; |
99e5ca6d | 956 | char *ss; |
718af59e | 957 | int n; |
fc8eec10 ZJS |
958 | uint16_t key_tag; |
959 | ||
960 | key_tag = dnssec_keytag(rr, true); | |
ff3d6560 | 961 | |
8e54f5d9 LP |
962 | r = dnssec_algorithm_to_string_alloc(rr->dnskey.algorithm, &alg); |
963 | if (r < 0) | |
964 | return NULL; | |
ff3d6560 | 965 | |
718af59e | 966 | r = asprintf(&s, "%s %u %u %s %n", |
8db0d2f5 | 967 | k, |
f91dc240 LP |
968 | rr->dnskey.flags, |
969 | rr->dnskey.protocol, | |
8e54f5d9 | 970 | alg, |
d7671a3e | 971 | &n); |
8db0d2f5 | 972 | if (r < 0) |
7b50eb2e | 973 | return NULL; |
d7671a3e ZJS |
974 | |
975 | r = base64_append(&s, n, | |
976 | rr->dnskey.key, rr->dnskey.key_size, | |
977 | 8, columns()); | |
978 | if (r < 0) | |
979 | return NULL; | |
980 | ||
99e5ca6d | 981 | r = asprintf(&ss, "%s\n" |
718af59e ZJS |
982 | " -- Flags:%s%s%s\n" |
983 | " -- Key tag: %u", | |
99e5ca6d | 984 | s, |
99e5ca6d ZJS |
985 | rr->dnskey.flags & DNSKEY_FLAG_SEP ? " SEP" : "", |
986 | rr->dnskey.flags & DNSKEY_FLAG_REVOKE ? " REVOKE" : "", | |
fc8eec10 | 987 | rr->dnskey.flags & DNSKEY_FLAG_ZONE_KEY ? " ZONE_KEY" : "", |
fc8eec10 | 988 | key_tag); |
99e5ca6d ZJS |
989 | if (r < 0) |
990 | return NULL; | |
991 | free(s); | |
992 | s = ss; | |
993 | ||
8db0d2f5 | 994 | break; |
ff3d6560 | 995 | } |
2d4c5cbc | 996 | |
151226ab | 997 | case DNS_TYPE_RRSIG: { |
8e54f5d9 | 998 | _cleanup_free_ char *alg = NULL; |
fbd0b64f | 999 | char expiration[STRLEN("YYYYMMDDHHmmSS") + 1], inception[STRLEN("YYYYMMDDHHmmSS") + 1]; |
8e54f5d9 | 1000 | const char *type; |
d7671a3e | 1001 | int n; |
151226ab ZJS |
1002 | |
1003 | type = dns_type_to_string(rr->rrsig.type_covered); | |
8e54f5d9 LP |
1004 | |
1005 | r = dnssec_algorithm_to_string_alloc(rr->rrsig.algorithm, &alg); | |
1006 | if (r < 0) | |
1007 | return NULL; | |
151226ab | 1008 | |
7c6423e1 TG |
1009 | r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration); |
1010 | if (r < 0) | |
7b50eb2e | 1011 | return NULL; |
7c6423e1 TG |
1012 | |
1013 | r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception); | |
1014 | if (r < 0) | |
7b50eb2e | 1015 | return NULL; |
7c6423e1 | 1016 | |
151226ab ZJS |
1017 | /* TYPE?? follows |
1018 | * http://tools.ietf.org/html/rfc3597#section-5 */ | |
1019 | ||
d7671a3e | 1020 | r = asprintf(&s, "%s %s%.*u %s %u %u %s %s %u %s %n", |
151226ab ZJS |
1021 | k, |
1022 | type ?: "TYPE", | |
1023 | type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, | |
8e54f5d9 | 1024 | alg, |
151226ab ZJS |
1025 | rr->rrsig.labels, |
1026 | rr->rrsig.original_ttl, | |
7c6423e1 TG |
1027 | expiration, |
1028 | inception, | |
151226ab ZJS |
1029 | rr->rrsig.key_tag, |
1030 | rr->rrsig.signer, | |
d7671a3e | 1031 | &n); |
151226ab | 1032 | if (r < 0) |
7b50eb2e | 1033 | return NULL; |
d7671a3e ZJS |
1034 | |
1035 | r = base64_append(&s, n, | |
1036 | rr->rrsig.signature, rr->rrsig.signature_size, | |
1037 | 8, columns()); | |
1038 | if (r < 0) | |
1039 | return NULL; | |
1040 | ||
151226ab ZJS |
1041 | break; |
1042 | } | |
1043 | ||
50f1e641 TG |
1044 | case DNS_TYPE_NSEC: |
1045 | t = format_types(rr->nsec.types); | |
1046 | if (!t) | |
7b50eb2e | 1047 | return NULL; |
50f1e641 TG |
1048 | |
1049 | r = asprintf(&s, "%s %s %s", | |
1050 | k, | |
1051 | rr->nsec.next_domain_name, | |
1052 | t); | |
1053 | if (r < 0) | |
7b50eb2e | 1054 | return NULL; |
50f1e641 TG |
1055 | break; |
1056 | ||
5d45a880 TG |
1057 | case DNS_TYPE_NSEC3: { |
1058 | _cleanup_free_ char *salt = NULL, *hash = NULL; | |
1059 | ||
f5430a3e | 1060 | if (rr->nsec3.salt_size > 0) { |
5d45a880 TG |
1061 | salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size); |
1062 | if (!salt) | |
7b50eb2e | 1063 | return NULL; |
5d45a880 TG |
1064 | } |
1065 | ||
1066 | hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false); | |
1067 | if (!hash) | |
7b50eb2e | 1068 | return NULL; |
5d45a880 TG |
1069 | |
1070 | t = format_types(rr->nsec3.types); | |
1071 | if (!t) | |
7b50eb2e | 1072 | return NULL; |
5d45a880 TG |
1073 | |
1074 | r = asprintf(&s, "%s %"PRIu8" %"PRIu8" %"PRIu16" %s %s %s", | |
1075 | k, | |
1076 | rr->nsec3.algorithm, | |
1077 | rr->nsec3.flags, | |
1078 | rr->nsec3.iterations, | |
f5430a3e | 1079 | rr->nsec3.salt_size > 0 ? salt : "-", |
5d45a880 TG |
1080 | hash, |
1081 | t); | |
1082 | if (r < 0) | |
7b50eb2e | 1083 | return NULL; |
5d45a880 TG |
1084 | |
1085 | break; | |
1086 | } | |
1087 | ||
48d45d2b | 1088 | case DNS_TYPE_TLSA: { |
cfb90da3 | 1089 | const char *cert_usage, *selector, *matching_type; |
48d45d2b | 1090 | |
cfb90da3 ZJS |
1091 | cert_usage = tlsa_cert_usage_to_string(rr->tlsa.cert_usage); |
1092 | selector = tlsa_selector_to_string(rr->tlsa.selector); | |
1093 | matching_type = tlsa_matching_type_to_string(rr->tlsa.matching_type); | |
1094 | ||
236d312b ZJS |
1095 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); |
1096 | if (!t) | |
48d45d2b | 1097 | return NULL; |
cfb90da3 | 1098 | |
236d312b ZJS |
1099 | r = asprintf(&s, |
1100 | "%s %u %u %u %s\n" | |
718af59e ZJS |
1101 | " -- Cert. usage: %s\n" |
1102 | " -- Selector: %s\n" | |
1103 | " -- Matching type: %s", | |
236d312b ZJS |
1104 | k, |
1105 | rr->tlsa.cert_usage, | |
1106 | rr->tlsa.selector, | |
1107 | rr->tlsa.matching_type, | |
1108 | t, | |
718af59e ZJS |
1109 | cert_usage, |
1110 | selector, | |
1111 | matching_type); | |
cfb90da3 ZJS |
1112 | if (r < 0) |
1113 | return NULL; | |
cfb90da3 | 1114 | |
48d45d2b ZJS |
1115 | break; |
1116 | } | |
1117 | ||
95052df3 ZJS |
1118 | case DNS_TYPE_CAA: { |
1119 | _cleanup_free_ char *value; | |
1120 | ||
1121 | value = octescape(rr->caa.value, rr->caa.value_size); | |
1122 | if (!value) | |
1123 | return NULL; | |
1124 | ||
718af59e | 1125 | r = asprintf(&s, "%s %u %s \"%s\"%s%s%s%.0u", |
95052df3 ZJS |
1126 | k, |
1127 | rr->caa.flags, | |
1128 | rr->caa.tag, | |
718af59e ZJS |
1129 | value, |
1130 | rr->caa.flags ? "\n -- Flags:" : "", | |
1131 | rr->caa.flags & CAA_FLAG_CRITICAL ? " critical" : "", | |
1132 | rr->caa.flags & ~CAA_FLAG_CRITICAL ? " " : "", | |
1133 | rr->caa.flags & ~CAA_FLAG_CRITICAL); | |
95052df3 ZJS |
1134 | if (r < 0) |
1135 | return NULL; | |
1136 | ||
1137 | break; | |
1138 | } | |
1139 | ||
d93a16b8 ZJS |
1140 | case DNS_TYPE_OPENPGPKEY: { |
1141 | int n; | |
1142 | ||
1143 | r = asprintf(&s, "%s %n", | |
1144 | k, | |
1145 | &n); | |
1146 | if (r < 0) | |
1147 | return NULL; | |
1148 | ||
1149 | r = base64_append(&s, n, | |
a43a068a | 1150 | rr->generic.data, rr->generic.data_size, |
d93a16b8 ZJS |
1151 | 8, columns()); |
1152 | if (r < 0) | |
1153 | return NULL; | |
1154 | break; | |
1155 | } | |
1156 | ||
8db0d2f5 | 1157 | default: |
a43a068a | 1158 | t = hexmem(rr->generic.data, rr->generic.data_size); |
8db0d2f5 | 1159 | if (!t) |
7b50eb2e | 1160 | return NULL; |
8db0d2f5 | 1161 | |
6af47493 | 1162 | /* Format as documented in RFC 3597, Section 5 */ |
a43a068a | 1163 | r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.data_size, t); |
d23a27a9 | 1164 | if (r < 0) |
7b50eb2e | 1165 | return NULL; |
2d4c5cbc | 1166 | break; |
8db0d2f5 | 1167 | } |
2d4c5cbc | 1168 | |
7b50eb2e LP |
1169 | rr->to_string = s; |
1170 | return s; | |
2d4c5cbc | 1171 | } |
322345fd | 1172 | |
2e74028a ZJS |
1173 | ssize_t dns_resource_record_payload(DnsResourceRecord *rr, void **out) { |
1174 | assert(rr); | |
1175 | assert(out); | |
1176 | ||
1177 | switch(rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { | |
1178 | case DNS_TYPE_SRV: | |
1179 | case DNS_TYPE_PTR: | |
1180 | case DNS_TYPE_NS: | |
1181 | case DNS_TYPE_CNAME: | |
1182 | case DNS_TYPE_DNAME: | |
1183 | case DNS_TYPE_HINFO: | |
1184 | case DNS_TYPE_SPF: | |
1185 | case DNS_TYPE_TXT: | |
1186 | case DNS_TYPE_A: | |
1187 | case DNS_TYPE_AAAA: | |
1188 | case DNS_TYPE_SOA: | |
1189 | case DNS_TYPE_MX: | |
1190 | case DNS_TYPE_LOC: | |
1191 | case DNS_TYPE_DS: | |
2e74028a ZJS |
1192 | case DNS_TYPE_DNSKEY: |
1193 | case DNS_TYPE_RRSIG: | |
1194 | case DNS_TYPE_NSEC: | |
1195 | case DNS_TYPE_NSEC3: | |
1196 | return -EINVAL; | |
1197 | ||
e1caa6e0 ZJS |
1198 | case DNS_TYPE_SSHFP: |
1199 | *out = rr->sshfp.fingerprint; | |
1200 | return rr->sshfp.fingerprint_size; | |
1201 | ||
2e74028a ZJS |
1202 | case DNS_TYPE_TLSA: |
1203 | *out = rr->tlsa.data; | |
1204 | return rr->tlsa.data_size; | |
1205 | ||
2e74028a ZJS |
1206 | case DNS_TYPE_OPENPGPKEY: |
1207 | default: | |
1208 | *out = rr->generic.data; | |
1209 | return rr->generic.data_size; | |
1210 | } | |
1211 | } | |
1212 | ||
a8812dd7 LP |
1213 | int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical) { |
1214 | ||
1215 | DnsPacket packet = { | |
1216 | .n_ref = 1, | |
1217 | .protocol = DNS_PROTOCOL_DNS, | |
1218 | .on_stack = true, | |
1219 | .refuse_compression = true, | |
1220 | .canonical_form = canonical, | |
1221 | }; | |
1222 | ||
1223 | size_t start, rds; | |
1224 | int r; | |
1225 | ||
1226 | assert(rr); | |
1227 | ||
1228 | /* Generates the RR in wire-format, optionally in the | |
1229 | * canonical form as discussed in the DNSSEC RFC 4034, Section | |
1230 | * 6.2. We allocate a throw-away DnsPacket object on the stack | |
1231 | * here, because we need some book-keeping for memory | |
1232 | * management, and can reuse the DnsPacket serializer, that | |
1233 | * can generate the canonical form, too, but also knows label | |
1234 | * compression and suchlike. */ | |
1235 | ||
1236 | if (rr->wire_format && rr->wire_format_canonical == canonical) | |
1237 | return 0; | |
1238 | ||
58ab31d5 | 1239 | r = dns_packet_append_rr(&packet, rr, 0, &start, &rds); |
a8812dd7 LP |
1240 | if (r < 0) |
1241 | return r; | |
1242 | ||
1243 | assert(start == 0); | |
1244 | assert(packet._data); | |
1245 | ||
1246 | free(rr->wire_format); | |
1247 | rr->wire_format = packet._data; | |
1248 | rr->wire_format_size = packet.size; | |
1249 | rr->wire_format_rdata_offset = rds; | |
1250 | rr->wire_format_canonical = canonical; | |
1251 | ||
1252 | packet._data = NULL; | |
1253 | dns_packet_unref(&packet); | |
1254 | ||
1255 | return 0; | |
1256 | } | |
1257 | ||
97c67192 LP |
1258 | int dns_resource_record_signer(DnsResourceRecord *rr, const char **ret) { |
1259 | const char *n; | |
1260 | int r; | |
1261 | ||
1262 | assert(rr); | |
1263 | assert(ret); | |
1264 | ||
1265 | /* Returns the RRset's signer, if it is known. */ | |
1266 | ||
1267 | if (rr->n_skip_labels_signer == (unsigned) -1) | |
1268 | return -ENODATA; | |
1269 | ||
1c02e7ba | 1270 | n = dns_resource_key_name(rr->key); |
97c67192 LP |
1271 | r = dns_name_skip(n, rr->n_skip_labels_signer, &n); |
1272 | if (r < 0) | |
1273 | return r; | |
1274 | if (r == 0) | |
1275 | return -EINVAL; | |
1276 | ||
1277 | *ret = n; | |
1278 | return 0; | |
1279 | } | |
1280 | ||
1281 | int dns_resource_record_source(DnsResourceRecord *rr, const char **ret) { | |
1282 | const char *n; | |
1283 | int r; | |
1284 | ||
1285 | assert(rr); | |
1286 | assert(ret); | |
1287 | ||
1288 | /* Returns the RRset's synthesizing source, if it is known. */ | |
1289 | ||
1290 | if (rr->n_skip_labels_source == (unsigned) -1) | |
1291 | return -ENODATA; | |
1292 | ||
1c02e7ba | 1293 | n = dns_resource_key_name(rr->key); |
97c67192 LP |
1294 | r = dns_name_skip(n, rr->n_skip_labels_source, &n); |
1295 | if (r < 0) | |
1296 | return r; | |
1297 | if (r == 0) | |
1298 | return -EINVAL; | |
1299 | ||
1300 | *ret = n; | |
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | int dns_resource_record_is_signer(DnsResourceRecord *rr, const char *zone) { | |
1305 | const char *signer; | |
1306 | int r; | |
1307 | ||
ab481675 LP |
1308 | assert(rr); |
1309 | ||
97c67192 LP |
1310 | r = dns_resource_record_signer(rr, &signer); |
1311 | if (r < 0) | |
1312 | return r; | |
1313 | ||
1314 | return dns_name_equal(zone, signer); | |
1315 | } | |
1316 | ||
ab481675 LP |
1317 | int dns_resource_record_is_synthetic(DnsResourceRecord *rr) { |
1318 | int r; | |
1319 | ||
1320 | assert(rr); | |
1321 | ||
1322 | /* Returns > 0 if the RR is generated from a wildcard, and is not the asterisk name itself */ | |
1323 | ||
1324 | if (rr->n_skip_labels_source == (unsigned) -1) | |
1325 | return -ENODATA; | |
1326 | ||
1327 | if (rr->n_skip_labels_source == 0) | |
1328 | return 0; | |
1329 | ||
1330 | if (rr->n_skip_labels_source > 1) | |
1331 | return 1; | |
1332 | ||
1c02e7ba | 1333 | r = dns_name_startswith(dns_resource_key_name(rr->key), "*"); |
ab481675 LP |
1334 | if (r < 0) |
1335 | return r; | |
1336 | ||
1337 | return !r; | |
1338 | } | |
1339 | ||
7a08d314 | 1340 | void dns_resource_record_hash_func(const DnsResourceRecord *rr, struct siphash *state) { |
c9c72065 LP |
1341 | assert(rr); |
1342 | ||
1343 | dns_resource_key_hash_func(rr->key, state); | |
1344 | ||
1345 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { | |
1346 | ||
1347 | case DNS_TYPE_SRV: | |
1348 | siphash24_compress(&rr->srv.priority, sizeof(rr->srv.priority), state); | |
1349 | siphash24_compress(&rr->srv.weight, sizeof(rr->srv.weight), state); | |
1350 | siphash24_compress(&rr->srv.port, sizeof(rr->srv.port), state); | |
1351 | dns_name_hash_func(rr->srv.name, state); | |
1352 | break; | |
1353 | ||
1354 | case DNS_TYPE_PTR: | |
1355 | case DNS_TYPE_NS: | |
1356 | case DNS_TYPE_CNAME: | |
1357 | case DNS_TYPE_DNAME: | |
1358 | dns_name_hash_func(rr->ptr.name, state); | |
1359 | break; | |
1360 | ||
1361 | case DNS_TYPE_HINFO: | |
1362 | string_hash_func(rr->hinfo.cpu, state); | |
1363 | string_hash_func(rr->hinfo.os, state); | |
1364 | break; | |
1365 | ||
1366 | case DNS_TYPE_TXT: | |
1367 | case DNS_TYPE_SPF: { | |
1368 | DnsTxtItem *j; | |
1369 | ||
1370 | LIST_FOREACH(items, j, rr->txt.items) { | |
1371 | siphash24_compress(j->data, j->length, state); | |
1372 | ||
d5115566 LP |
1373 | /* Add an extra NUL byte, so that "a" followed by "b" doesn't result in the same hash as "ab" |
1374 | * followed by "". */ | |
1375 | siphash24_compress_byte(0, state); | |
c9c72065 LP |
1376 | } |
1377 | break; | |
1378 | } | |
1379 | ||
1380 | case DNS_TYPE_A: | |
1381 | siphash24_compress(&rr->a.in_addr, sizeof(rr->a.in_addr), state); | |
1382 | break; | |
1383 | ||
1384 | case DNS_TYPE_AAAA: | |
1385 | siphash24_compress(&rr->aaaa.in6_addr, sizeof(rr->aaaa.in6_addr), state); | |
1386 | break; | |
1387 | ||
1388 | case DNS_TYPE_SOA: | |
1389 | dns_name_hash_func(rr->soa.mname, state); | |
1390 | dns_name_hash_func(rr->soa.rname, state); | |
1391 | siphash24_compress(&rr->soa.serial, sizeof(rr->soa.serial), state); | |
1392 | siphash24_compress(&rr->soa.refresh, sizeof(rr->soa.refresh), state); | |
1393 | siphash24_compress(&rr->soa.retry, sizeof(rr->soa.retry), state); | |
1394 | siphash24_compress(&rr->soa.expire, sizeof(rr->soa.expire), state); | |
1395 | siphash24_compress(&rr->soa.minimum, sizeof(rr->soa.minimum), state); | |
1396 | break; | |
1397 | ||
1398 | case DNS_TYPE_MX: | |
1399 | siphash24_compress(&rr->mx.priority, sizeof(rr->mx.priority), state); | |
1400 | dns_name_hash_func(rr->mx.exchange, state); | |
1401 | break; | |
1402 | ||
1403 | case DNS_TYPE_LOC: | |
1404 | siphash24_compress(&rr->loc.version, sizeof(rr->loc.version), state); | |
1405 | siphash24_compress(&rr->loc.size, sizeof(rr->loc.size), state); | |
1406 | siphash24_compress(&rr->loc.horiz_pre, sizeof(rr->loc.horiz_pre), state); | |
1407 | siphash24_compress(&rr->loc.vert_pre, sizeof(rr->loc.vert_pre), state); | |
1408 | siphash24_compress(&rr->loc.latitude, sizeof(rr->loc.latitude), state); | |
1409 | siphash24_compress(&rr->loc.longitude, sizeof(rr->loc.longitude), state); | |
1410 | siphash24_compress(&rr->loc.altitude, sizeof(rr->loc.altitude), state); | |
1411 | break; | |
1412 | ||
1413 | case DNS_TYPE_SSHFP: | |
1414 | siphash24_compress(&rr->sshfp.algorithm, sizeof(rr->sshfp.algorithm), state); | |
1415 | siphash24_compress(&rr->sshfp.fptype, sizeof(rr->sshfp.fptype), state); | |
1416 | siphash24_compress(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size, state); | |
1417 | break; | |
1418 | ||
1419 | case DNS_TYPE_DNSKEY: | |
1420 | siphash24_compress(&rr->dnskey.flags, sizeof(rr->dnskey.flags), state); | |
1421 | siphash24_compress(&rr->dnskey.protocol, sizeof(rr->dnskey.protocol), state); | |
1422 | siphash24_compress(&rr->dnskey.algorithm, sizeof(rr->dnskey.algorithm), state); | |
1423 | siphash24_compress(rr->dnskey.key, rr->dnskey.key_size, state); | |
1424 | break; | |
1425 | ||
1426 | case DNS_TYPE_RRSIG: | |
1427 | siphash24_compress(&rr->rrsig.type_covered, sizeof(rr->rrsig.type_covered), state); | |
1428 | siphash24_compress(&rr->rrsig.algorithm, sizeof(rr->rrsig.algorithm), state); | |
1429 | siphash24_compress(&rr->rrsig.labels, sizeof(rr->rrsig.labels), state); | |
1430 | siphash24_compress(&rr->rrsig.original_ttl, sizeof(rr->rrsig.original_ttl), state); | |
1431 | siphash24_compress(&rr->rrsig.expiration, sizeof(rr->rrsig.expiration), state); | |
1432 | siphash24_compress(&rr->rrsig.inception, sizeof(rr->rrsig.inception), state); | |
1433 | siphash24_compress(&rr->rrsig.key_tag, sizeof(rr->rrsig.key_tag), state); | |
1434 | dns_name_hash_func(rr->rrsig.signer, state); | |
1435 | siphash24_compress(rr->rrsig.signature, rr->rrsig.signature_size, state); | |
1436 | break; | |
1437 | ||
1438 | case DNS_TYPE_NSEC: | |
1439 | dns_name_hash_func(rr->nsec.next_domain_name, state); | |
1440 | /* FIXME: we leave out the type bitmap here. Hash | |
1441 | * would be better if we'd take it into account | |
1442 | * too. */ | |
1443 | break; | |
1444 | ||
1445 | case DNS_TYPE_DS: | |
1446 | siphash24_compress(&rr->ds.key_tag, sizeof(rr->ds.key_tag), state); | |
1447 | siphash24_compress(&rr->ds.algorithm, sizeof(rr->ds.algorithm), state); | |
1448 | siphash24_compress(&rr->ds.digest_type, sizeof(rr->ds.digest_type), state); | |
1449 | siphash24_compress(rr->ds.digest, rr->ds.digest_size, state); | |
1450 | break; | |
1451 | ||
1452 | case DNS_TYPE_NSEC3: | |
1453 | siphash24_compress(&rr->nsec3.algorithm, sizeof(rr->nsec3.algorithm), state); | |
1454 | siphash24_compress(&rr->nsec3.flags, sizeof(rr->nsec3.flags), state); | |
1455 | siphash24_compress(&rr->nsec3.iterations, sizeof(rr->nsec3.iterations), state); | |
1456 | siphash24_compress(rr->nsec3.salt, rr->nsec3.salt_size, state); | |
1457 | siphash24_compress(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, state); | |
1458 | /* FIXME: We leave the bitmaps out */ | |
1459 | break; | |
48d45d2b ZJS |
1460 | |
1461 | case DNS_TYPE_TLSA: | |
1462 | siphash24_compress(&rr->tlsa.cert_usage, sizeof(rr->tlsa.cert_usage), state); | |
1463 | siphash24_compress(&rr->tlsa.selector, sizeof(rr->tlsa.selector), state); | |
1464 | siphash24_compress(&rr->tlsa.matching_type, sizeof(rr->tlsa.matching_type), state); | |
fa45182e | 1465 | siphash24_compress(rr->tlsa.data, rr->tlsa.data_size, state); |
48d45d2b | 1466 | break; |
c9c72065 | 1467 | |
95052df3 ZJS |
1468 | case DNS_TYPE_CAA: |
1469 | siphash24_compress(&rr->caa.flags, sizeof(rr->caa.flags), state); | |
1470 | string_hash_func(rr->caa.tag, state); | |
1471 | siphash24_compress(rr->caa.value, rr->caa.value_size, state); | |
48d45d2b | 1472 | break; |
c9c72065 | 1473 | |
d93a16b8 | 1474 | case DNS_TYPE_OPENPGPKEY: |
c9c72065 | 1475 | default: |
a43a068a | 1476 | siphash24_compress(rr->generic.data, rr->generic.data_size, state); |
c9c72065 LP |
1477 | break; |
1478 | } | |
1479 | } | |
1480 | ||
7a08d314 YW |
1481 | static int dns_resource_record_compare_func(const DnsResourceRecord *x, const DnsResourceRecord *y) { |
1482 | int r; | |
c9c72065 | 1483 | |
7a08d314 YW |
1484 | r = dns_resource_key_compare_func(x->key, y->key); |
1485 | if (r != 0) | |
1486 | return r; | |
c9c72065 LP |
1487 | |
1488 | if (dns_resource_record_equal(x, y)) | |
1489 | return 0; | |
1490 | ||
53c5797f FB |
1491 | /* We still use CMP() here, even though don't implement proper |
1492 | * ordering, since the hashtable doesn't need ordering anyway. */ | |
1493 | return CMP(x, y); | |
c9c72065 LP |
1494 | } |
1495 | ||
7a08d314 | 1496 | DEFINE_HASH_OPS(dns_resource_record_hash_ops, DnsResourceRecord, dns_resource_record_hash_func, dns_resource_record_compare_func); |
c9c72065 | 1497 | |
17c8de63 LP |
1498 | DnsResourceRecord *dns_resource_record_copy(DnsResourceRecord *rr) { |
1499 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *copy = NULL; | |
1500 | DnsResourceRecord *t; | |
1501 | ||
1502 | assert(rr); | |
1503 | ||
1504 | copy = dns_resource_record_new(rr->key); | |
1505 | if (!copy) | |
1506 | return NULL; | |
1507 | ||
1508 | copy->ttl = rr->ttl; | |
1509 | copy->expiry = rr->expiry; | |
1510 | copy->n_skip_labels_signer = rr->n_skip_labels_signer; | |
1511 | copy->n_skip_labels_source = rr->n_skip_labels_source; | |
1512 | copy->unparseable = rr->unparseable; | |
1513 | ||
1514 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { | |
1515 | ||
1516 | case DNS_TYPE_SRV: | |
1517 | copy->srv.priority = rr->srv.priority; | |
1518 | copy->srv.weight = rr->srv.weight; | |
1519 | copy->srv.port = rr->srv.port; | |
1520 | copy->srv.name = strdup(rr->srv.name); | |
1521 | if (!copy->srv.name) | |
1522 | return NULL; | |
1523 | break; | |
1524 | ||
1525 | case DNS_TYPE_PTR: | |
1526 | case DNS_TYPE_NS: | |
1527 | case DNS_TYPE_CNAME: | |
1528 | case DNS_TYPE_DNAME: | |
1529 | copy->ptr.name = strdup(rr->ptr.name); | |
1530 | if (!copy->ptr.name) | |
1531 | return NULL; | |
1532 | break; | |
1533 | ||
1534 | case DNS_TYPE_HINFO: | |
1535 | copy->hinfo.cpu = strdup(rr->hinfo.cpu); | |
1536 | if (!copy->hinfo.cpu) | |
1537 | return NULL; | |
1538 | ||
1539 | copy->hinfo.os = strdup(rr->hinfo.os); | |
508f63b4 | 1540 | if (!copy->hinfo.os) |
17c8de63 LP |
1541 | return NULL; |
1542 | break; | |
1543 | ||
1544 | case DNS_TYPE_TXT: | |
1545 | case DNS_TYPE_SPF: | |
1546 | copy->txt.items = dns_txt_item_copy(rr->txt.items); | |
1547 | if (!copy->txt.items) | |
1548 | return NULL; | |
1549 | break; | |
1550 | ||
1551 | case DNS_TYPE_A: | |
1552 | copy->a = rr->a; | |
1553 | break; | |
1554 | ||
1555 | case DNS_TYPE_AAAA: | |
1556 | copy->aaaa = rr->aaaa; | |
1557 | break; | |
1558 | ||
1559 | case DNS_TYPE_SOA: | |
1560 | copy->soa.mname = strdup(rr->soa.mname); | |
1561 | if (!copy->soa.mname) | |
1562 | return NULL; | |
1563 | copy->soa.rname = strdup(rr->soa.rname); | |
1564 | if (!copy->soa.rname) | |
1565 | return NULL; | |
1566 | copy->soa.serial = rr->soa.serial; | |
1567 | copy->soa.refresh = rr->soa.refresh; | |
1568 | copy->soa.retry = rr->soa.retry; | |
1569 | copy->soa.expire = rr->soa.expire; | |
1570 | copy->soa.minimum = rr->soa.minimum; | |
1571 | break; | |
1572 | ||
1573 | case DNS_TYPE_MX: | |
1574 | copy->mx.priority = rr->mx.priority; | |
1575 | copy->mx.exchange = strdup(rr->mx.exchange); | |
1576 | if (!copy->mx.exchange) | |
1577 | return NULL; | |
1578 | break; | |
1579 | ||
1580 | case DNS_TYPE_LOC: | |
1581 | copy->loc = rr->loc; | |
1582 | break; | |
1583 | ||
1584 | case DNS_TYPE_SSHFP: | |
1585 | copy->sshfp.algorithm = rr->sshfp.algorithm; | |
1586 | copy->sshfp.fptype = rr->sshfp.fptype; | |
1587 | copy->sshfp.fingerprint = memdup(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); | |
1588 | if (!copy->sshfp.fingerprint) | |
1589 | return NULL; | |
1590 | copy->sshfp.fingerprint_size = rr->sshfp.fingerprint_size; | |
1591 | break; | |
1592 | ||
1593 | case DNS_TYPE_DNSKEY: | |
1594 | copy->dnskey.flags = rr->dnskey.flags; | |
1595 | copy->dnskey.protocol = rr->dnskey.protocol; | |
1596 | copy->dnskey.algorithm = rr->dnskey.algorithm; | |
1597 | copy->dnskey.key = memdup(rr->dnskey.key, rr->dnskey.key_size); | |
1598 | if (!copy->dnskey.key) | |
1599 | return NULL; | |
1600 | copy->dnskey.key_size = rr->dnskey.key_size; | |
1601 | break; | |
1602 | ||
1603 | case DNS_TYPE_RRSIG: | |
1604 | copy->rrsig.type_covered = rr->rrsig.type_covered; | |
1605 | copy->rrsig.algorithm = rr->rrsig.algorithm; | |
1606 | copy->rrsig.labels = rr->rrsig.labels; | |
1607 | copy->rrsig.original_ttl = rr->rrsig.original_ttl; | |
1608 | copy->rrsig.expiration = rr->rrsig.expiration; | |
1609 | copy->rrsig.inception = rr->rrsig.inception; | |
1610 | copy->rrsig.key_tag = rr->rrsig.key_tag; | |
1611 | copy->rrsig.signer = strdup(rr->rrsig.signer); | |
1612 | if (!copy->rrsig.signer) | |
1613 | return NULL; | |
1614 | copy->rrsig.signature = memdup(rr->rrsig.signature, rr->rrsig.signature_size); | |
1615 | if (!copy->rrsig.signature) | |
1616 | return NULL; | |
1617 | copy->rrsig.signature_size = rr->rrsig.signature_size; | |
1618 | break; | |
1619 | ||
1620 | case DNS_TYPE_NSEC: | |
1621 | copy->nsec.next_domain_name = strdup(rr->nsec.next_domain_name); | |
1622 | if (!copy->nsec.next_domain_name) | |
1623 | return NULL; | |
1624 | copy->nsec.types = bitmap_copy(rr->nsec.types); | |
1625 | if (!copy->nsec.types) | |
1626 | return NULL; | |
1627 | break; | |
1628 | ||
1629 | case DNS_TYPE_DS: | |
1630 | copy->ds.key_tag = rr->ds.key_tag; | |
1631 | copy->ds.algorithm = rr->ds.algorithm; | |
1632 | copy->ds.digest_type = rr->ds.digest_type; | |
1633 | copy->ds.digest = memdup(rr->ds.digest, rr->ds.digest_size); | |
1634 | if (!copy->ds.digest) | |
1635 | return NULL; | |
1636 | copy->ds.digest_size = rr->ds.digest_size; | |
1637 | break; | |
1638 | ||
1639 | case DNS_TYPE_NSEC3: | |
1640 | copy->nsec3.algorithm = rr->nsec3.algorithm; | |
1641 | copy->nsec3.flags = rr->nsec3.flags; | |
1642 | copy->nsec3.iterations = rr->nsec3.iterations; | |
1643 | copy->nsec3.salt = memdup(rr->nsec3.salt, rr->nsec3.salt_size); | |
1644 | if (!copy->nsec3.salt) | |
1645 | return NULL; | |
1646 | copy->nsec3.salt_size = rr->nsec3.salt_size; | |
1647 | copy->nsec3.next_hashed_name = memdup(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size); | |
1648 | if (!copy->nsec3.next_hashed_name_size) | |
1649 | return NULL; | |
1650 | copy->nsec3.next_hashed_name_size = rr->nsec3.next_hashed_name_size; | |
1651 | copy->nsec3.types = bitmap_copy(rr->nsec3.types); | |
1652 | if (!copy->nsec3.types) | |
1653 | return NULL; | |
1654 | break; | |
1655 | ||
1656 | case DNS_TYPE_TLSA: | |
1657 | copy->tlsa.cert_usage = rr->tlsa.cert_usage; | |
1658 | copy->tlsa.selector = rr->tlsa.selector; | |
1659 | copy->tlsa.matching_type = rr->tlsa.matching_type; | |
1660 | copy->tlsa.data = memdup(rr->tlsa.data, rr->tlsa.data_size); | |
1661 | if (!copy->tlsa.data) | |
1662 | return NULL; | |
1663 | copy->tlsa.data_size = rr->tlsa.data_size; | |
1664 | break; | |
1665 | ||
1666 | case DNS_TYPE_CAA: | |
1667 | copy->caa.flags = rr->caa.flags; | |
1668 | copy->caa.tag = strdup(rr->caa.tag); | |
1669 | if (!copy->caa.tag) | |
1670 | return NULL; | |
1671 | copy->caa.value = memdup(rr->caa.value, rr->caa.value_size); | |
1672 | if (!copy->caa.value) | |
1673 | return NULL; | |
1674 | copy->caa.value_size = rr->caa.value_size; | |
1675 | break; | |
1676 | ||
1677 | case DNS_TYPE_OPT: | |
1678 | default: | |
1679 | copy->generic.data = memdup(rr->generic.data, rr->generic.data_size); | |
1680 | if (!copy->generic.data) | |
1681 | return NULL; | |
1682 | copy->generic.data_size = rr->generic.data_size; | |
1683 | break; | |
1684 | } | |
1685 | ||
1cc6c93a | 1686 | t = TAKE_PTR(copy); |
17c8de63 LP |
1687 | |
1688 | return t; | |
1689 | } | |
1690 | ||
1691 | int dns_resource_record_clamp_ttl(DnsResourceRecord **rr, uint32_t max_ttl) { | |
1692 | DnsResourceRecord *old_rr, *new_rr; | |
1693 | uint32_t new_ttl; | |
1694 | ||
1695 | assert(rr); | |
1696 | old_rr = *rr; | |
1697 | ||
1698 | if (old_rr->key->type == DNS_TYPE_OPT) | |
1699 | return -EINVAL; | |
1700 | ||
1701 | new_ttl = MIN(old_rr->ttl, max_ttl); | |
1702 | if (new_ttl == old_rr->ttl) | |
1703 | return 0; | |
1704 | ||
1705 | if (old_rr->n_ref == 1) { | |
1706 | /* Patch in place */ | |
1707 | old_rr->ttl = new_ttl; | |
1708 | return 1; | |
1709 | } | |
1710 | ||
1711 | new_rr = dns_resource_record_copy(old_rr); | |
1712 | if (!new_rr) | |
1713 | return -ENOMEM; | |
1714 | ||
1715 | new_rr->ttl = new_ttl; | |
1716 | ||
1717 | dns_resource_record_unref(*rr); | |
1718 | *rr = new_rr; | |
1719 | ||
1720 | return 1; | |
1721 | } | |
1722 | ||
2001c805 LP |
1723 | DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i) { |
1724 | DnsTxtItem *n; | |
1725 | ||
1726 | if (!i) | |
1727 | return NULL; | |
1728 | ||
1729 | n = i->items_next; | |
1730 | ||
1731 | free(i); | |
1732 | return dns_txt_item_free_all(n); | |
1733 | } | |
1734 | ||
1735 | bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) { | |
1736 | ||
4d247a6c LP |
1737 | if (a == b) |
1738 | return true; | |
1739 | ||
2001c805 LP |
1740 | if (!a != !b) |
1741 | return false; | |
1742 | ||
1743 | if (!a) | |
1744 | return true; | |
1745 | ||
1746 | if (a->length != b->length) | |
1747 | return false; | |
1748 | ||
1749 | if (memcmp(a->data, b->data, a->length) != 0) | |
1750 | return false; | |
1751 | ||
1752 | return dns_txt_item_equal(a->items_next, b->items_next); | |
1753 | } | |
8730bccf | 1754 | |
17c8de63 LP |
1755 | DnsTxtItem *dns_txt_item_copy(DnsTxtItem *first) { |
1756 | DnsTxtItem *i, *copy = NULL, *end = NULL; | |
1757 | ||
1758 | LIST_FOREACH(items, i, first) { | |
1759 | DnsTxtItem *j; | |
1760 | ||
1761 | j = memdup(i, offsetof(DnsTxtItem, data) + i->length + 1); | |
1762 | if (!j) { | |
1763 | dns_txt_item_free_all(copy); | |
1764 | return NULL; | |
1765 | } | |
1766 | ||
1767 | LIST_INSERT_AFTER(items, copy, end, j); | |
1768 | end = j; | |
1769 | } | |
1770 | ||
1771 | return copy; | |
1772 | } | |
1773 | ||
ebb779dc DR |
1774 | int dns_txt_item_new_empty(DnsTxtItem **ret) { |
1775 | DnsTxtItem *i; | |
1776 | ||
1777 | /* RFC 6763, section 6.1 suggests to treat | |
1778 | * empty TXT RRs as equivalent to a TXT record | |
1779 | * with a single empty string. */ | |
1780 | ||
1781 | i = malloc0(offsetof(DnsTxtItem, data) + 1); /* for safety reasons we add an extra NUL byte */ | |
1782 | if (!i) | |
1783 | return -ENOMEM; | |
1784 | ||
1785 | *ret = i; | |
1786 | ||
1787 | return 0; | |
1788 | } | |
1789 | ||
8730bccf | 1790 | static const char* const dnssec_algorithm_table[_DNSSEC_ALGORITHM_MAX_DEFINED] = { |
6f717d08 | 1791 | /* Mnemonics as listed on https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */ |
8730bccf LP |
1792 | [DNSSEC_ALGORITHM_RSAMD5] = "RSAMD5", |
1793 | [DNSSEC_ALGORITHM_DH] = "DH", | |
1794 | [DNSSEC_ALGORITHM_DSA] = "DSA", | |
1795 | [DNSSEC_ALGORITHM_ECC] = "ECC", | |
1796 | [DNSSEC_ALGORITHM_RSASHA1] = "RSASHA1", | |
1797 | [DNSSEC_ALGORITHM_DSA_NSEC3_SHA1] = "DSA-NSEC3-SHA1", | |
1798 | [DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1] = "RSASHA1-NSEC3-SHA1", | |
1799 | [DNSSEC_ALGORITHM_RSASHA256] = "RSASHA256", | |
1800 | [DNSSEC_ALGORITHM_RSASHA512] = "RSASHA512", | |
6f717d08 LP |
1801 | [DNSSEC_ALGORITHM_ECC_GOST] = "ECC-GOST", |
1802 | [DNSSEC_ALGORITHM_ECDSAP256SHA256] = "ECDSAP256SHA256", | |
1803 | [DNSSEC_ALGORITHM_ECDSAP384SHA384] = "ECDSAP384SHA384", | |
cb9eeb06 MCO |
1804 | [DNSSEC_ALGORITHM_ED25519] = "ED25519", |
1805 | [DNSSEC_ALGORITHM_ED448] = "ED448", | |
8730bccf LP |
1806 | [DNSSEC_ALGORITHM_INDIRECT] = "INDIRECT", |
1807 | [DNSSEC_ALGORITHM_PRIVATEDNS] = "PRIVATEDNS", | |
1808 | [DNSSEC_ALGORITHM_PRIVATEOID] = "PRIVATEOID", | |
1809 | }; | |
8e54f5d9 | 1810 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_algorithm, int, 255); |
8730bccf LP |
1811 | |
1812 | static const char* const dnssec_digest_table[_DNSSEC_DIGEST_MAX_DEFINED] = { | |
6f717d08 LP |
1813 | /* Names as listed on https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml */ |
1814 | [DNSSEC_DIGEST_SHA1] = "SHA-1", | |
1815 | [DNSSEC_DIGEST_SHA256] = "SHA-256", | |
1816 | [DNSSEC_DIGEST_GOST_R_34_11_94] = "GOST_R_34.11-94", | |
1817 | [DNSSEC_DIGEST_SHA384] = "SHA-384", | |
8730bccf | 1818 | }; |
8e54f5d9 | 1819 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_digest, int, 255); |