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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 { | |
5afcf89c | 50 | _cleanup_free_ char *destination = NULL; |
58db254a | 51 | DnsResourceKey *k; |
58db254a | 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 | 60 | if (!k) |
5afcf89c | 61 | return NULL; |
58db254a | 62 | |
5afcf89c | 63 | TAKE_PTR(destination); |
58db254a LP |
64 | return k; |
65 | } | |
36d9205d TG |
66 | } |
67 | ||
801ad6a6 LP |
68 | int dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name) { |
69 | DnsResourceKey *new_key; | |
70 | char *joined; | |
71 | int r; | |
72 | ||
73 | assert(ret); | |
74 | assert(key); | |
75 | assert(name); | |
76 | ||
dc477e73 | 77 | if (dns_name_is_root(name)) { |
801ad6a6 LP |
78 | *ret = dns_resource_key_ref(key); |
79 | return 0; | |
80 | } | |
81 | ||
7470cc4c | 82 | r = dns_name_concat(dns_resource_key_name(key), name, 0, &joined); |
801ad6a6 LP |
83 | if (r < 0) |
84 | return r; | |
85 | ||
86 | new_key = dns_resource_key_new_consume(key->class, key->type, joined); | |
87 | if (!new_key) { | |
88 | free(joined); | |
89 | return -ENOMEM; | |
90 | } | |
91 | ||
92 | *ret = new_key; | |
93 | return 0; | |
94 | } | |
95 | ||
faa133f3 LP |
96 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) { |
97 | DnsResourceKey *k; | |
98 | ||
99 | assert(name); | |
100 | ||
1ed31408 | 101 | k = new(DnsResourceKey, 1); |
faa133f3 LP |
102 | if (!k) |
103 | return NULL; | |
104 | ||
1ed31408 LP |
105 | *k = (DnsResourceKey) { |
106 | .n_ref = 1, | |
107 | .class = class, | |
108 | .type = type, | |
109 | ._name = name, | |
110 | }; | |
faa133f3 LP |
111 | |
112 | return k; | |
113 | } | |
114 | ||
115 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) { | |
116 | ||
117 | if (!k) | |
118 | return NULL; | |
119 | ||
1b4f6e79 LP |
120 | /* Static/const keys created with DNS_RESOURCE_KEY_CONST will |
121 | * set this to -1, they should not be reffed/unreffed */ | |
f5fbe71d | 122 | assert(k->n_ref != UINT_MAX); |
1b4f6e79 | 123 | |
faa133f3 LP |
124 | assert(k->n_ref > 0); |
125 | k->n_ref++; | |
126 | ||
127 | return k; | |
128 | } | |
129 | ||
130 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) { | |
131 | if (!k) | |
132 | return NULL; | |
133 | ||
f5fbe71d | 134 | assert(k->n_ref != UINT_MAX); |
faa133f3 LP |
135 | assert(k->n_ref > 0); |
136 | ||
137 | if (k->n_ref == 1) { | |
138 | free(k->_name); | |
139 | free(k); | |
140 | } else | |
141 | k->n_ref--; | |
142 | ||
143 | return NULL; | |
144 | } | |
145 | ||
1c02e7ba ZJS |
146 | const char* dns_resource_key_name(const DnsResourceKey *key) { |
147 | const char *name; | |
148 | ||
149 | if (!key) | |
150 | return NULL; | |
151 | ||
152 | if (key->_name) | |
153 | name = key->_name; | |
154 | else | |
155 | name = (char*) key + sizeof(DnsResourceKey); | |
156 | ||
157 | if (dns_name_is_root(name)) | |
158 | return "."; | |
159 | else | |
160 | return name; | |
161 | } | |
162 | ||
28b9b764 LP |
163 | bool dns_resource_key_is_address(const DnsResourceKey *key) { |
164 | assert(key); | |
165 | ||
166 | /* Check if this is an A or AAAA resource key */ | |
167 | ||
168 | return key->class == DNS_CLASS_IN && IN_SET(key->type, DNS_TYPE_A, DNS_TYPE_AAAA); | |
169 | } | |
170 | ||
a2bf8a19 DR |
171 | bool dns_resource_key_is_dnssd_ptr(const DnsResourceKey *key) { |
172 | assert(key); | |
173 | ||
174 | /* Check if this is a PTR resource key used in | |
175 | Service Instance Enumeration as described in RFC6763 p4.1. */ | |
176 | ||
177 | if (key->type != DNS_TYPE_PTR) | |
178 | return false; | |
179 | ||
180 | return dns_name_endswith(dns_resource_key_name(key), "_tcp.local") || | |
181 | dns_name_endswith(dns_resource_key_name(key), "_udp.local"); | |
182 | } | |
183 | ||
faa133f3 LP |
184 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) { |
185 | int r; | |
186 | ||
4d247a6c LP |
187 | if (a == b) |
188 | return 1; | |
189 | ||
1c02e7ba | 190 | r = dns_name_equal(dns_resource_key_name(a), dns_resource_key_name(b)); |
faa133f3 LP |
191 | if (r <= 0) |
192 | return r; | |
193 | ||
194 | if (a->class != b->class) | |
195 | return 0; | |
196 | ||
197 | if (a->type != b->type) | |
198 | return 0; | |
199 | ||
200 | return 1; | |
201 | } | |
202 | ||
105e1512 | 203 | int dns_resource_key_match_rr(const DnsResourceKey *key, DnsResourceRecord *rr, const char *search_domain) { |
801ad6a6 LP |
204 | int r; |
205 | ||
faa133f3 LP |
206 | assert(key); |
207 | assert(rr); | |
208 | ||
4d247a6c LP |
209 | if (key == rr->key) |
210 | return 1; | |
211 | ||
801ad6a6 LP |
212 | /* Checks if an rr matches the specified key. If a search |
213 | * domain is specified, it will also be checked if the key | |
214 | * with the search domain suffixed might match the RR. */ | |
215 | ||
faa133f3 LP |
216 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) |
217 | return 0; | |
218 | ||
219 | if (rr->key->type != key->type && key->type != DNS_TYPE_ANY) | |
220 | return 0; | |
221 | ||
1c02e7ba | 222 | r = dns_name_equal(dns_resource_key_name(rr->key), dns_resource_key_name(key)); |
801ad6a6 LP |
223 | if (r != 0) |
224 | return r; | |
225 | ||
226 | if (search_domain) { | |
227 | _cleanup_free_ char *joined = NULL; | |
228 | ||
7470cc4c | 229 | r = dns_name_concat(dns_resource_key_name(key), search_domain, 0, &joined); |
801ad6a6 LP |
230 | if (r < 0) |
231 | return r; | |
232 | ||
1c02e7ba | 233 | return dns_name_equal(dns_resource_key_name(rr->key), joined); |
801ad6a6 LP |
234 | } |
235 | ||
236 | return 0; | |
faa133f3 LP |
237 | } |
238 | ||
5d27351f | 239 | int dns_resource_key_match_cname_or_dname(const DnsResourceKey *key, const DnsResourceKey *cname, const char *search_domain) { |
801ad6a6 LP |
240 | int r; |
241 | ||
faa133f3 | 242 | assert(key); |
5d27351f | 243 | assert(cname); |
faa133f3 | 244 | |
5d27351f | 245 | if (cname->class != key->class && key->class != DNS_CLASS_ANY) |
faa133f3 LP |
246 | return 0; |
247 | ||
d2995826 LP |
248 | if (!dns_type_may_redirect(key->type)) |
249 | return 0; | |
250 | ||
5d27351f | 251 | if (cname->type == DNS_TYPE_CNAME) |
1c02e7ba | 252 | r = dns_name_equal(dns_resource_key_name(key), dns_resource_key_name(cname)); |
5d27351f | 253 | else if (cname->type == DNS_TYPE_DNAME) |
1c02e7ba | 254 | r = dns_name_endswith(dns_resource_key_name(key), dns_resource_key_name(cname)); |
58db254a | 255 | else |
faa133f3 | 256 | return 0; |
801ad6a6 LP |
257 | |
258 | if (r != 0) | |
259 | return r; | |
260 | ||
261 | if (search_domain) { | |
262 | _cleanup_free_ char *joined = NULL; | |
263 | ||
7470cc4c | 264 | r = dns_name_concat(dns_resource_key_name(key), search_domain, 0, &joined); |
801ad6a6 LP |
265 | if (r < 0) |
266 | return r; | |
267 | ||
5d27351f | 268 | if (cname->type == DNS_TYPE_CNAME) |
1c02e7ba | 269 | return dns_name_equal(joined, dns_resource_key_name(cname)); |
5d27351f | 270 | else if (cname->type == DNS_TYPE_DNAME) |
1c02e7ba | 271 | return dns_name_endswith(joined, dns_resource_key_name(cname)); |
801ad6a6 LP |
272 | } |
273 | ||
274 | return 0; | |
547973de LP |
275 | } |
276 | ||
277 | int dns_resource_key_match_soa(const DnsResourceKey *key, const DnsResourceKey *soa) { | |
278 | assert(soa); | |
279 | assert(key); | |
280 | ||
281 | /* Checks whether 'soa' is a SOA record for the specified key. */ | |
282 | ||
65b200e7 | 283 | if (soa->class != key->class) |
547973de | 284 | return 0; |
801ad6a6 | 285 | |
547973de LP |
286 | if (soa->type != DNS_TYPE_SOA) |
287 | return 0; | |
288 | ||
1c02e7ba | 289 | return dns_name_endswith(dns_resource_key_name(key), dns_resource_key_name(soa)); |
74b2466e LP |
290 | } |
291 | ||
7a08d314 | 292 | static void dns_resource_key_hash_func(const DnsResourceKey *k, struct siphash *state) { |
b826ab58 | 293 | assert(k); |
322345fd | 294 | |
1c02e7ba | 295 | dns_name_hash_func(dns_resource_key_name(k), state); |
b826ab58 TG |
296 | siphash24_compress(&k->class, sizeof(k->class), state); |
297 | siphash24_compress(&k->type, sizeof(k->type), state); | |
322345fd LP |
298 | } |
299 | ||
7a08d314 | 300 | static int dns_resource_key_compare_func(const DnsResourceKey *x, const DnsResourceKey *y) { |
60086492 | 301 | int r; |
322345fd | 302 | |
60086492 YW |
303 | r = dns_name_compare_func(dns_resource_key_name(x), dns_resource_key_name(y)); |
304 | if (r != 0) | |
305 | return r; | |
322345fd | 306 | |
60086492 YW |
307 | r = CMP(x->type, y->type); |
308 | if (r != 0) | |
309 | return r; | |
322345fd | 310 | |
60086492 | 311 | return CMP(x->class, y->class); |
322345fd LP |
312 | } |
313 | ||
7a08d314 | 314 | DEFINE_HASH_OPS(dns_resource_key_hash_ops, DnsResourceKey, dns_resource_key_hash_func, dns_resource_key_compare_func); |
d5099efc | 315 | |
202b76ae | 316 | char* dns_resource_key_to_string(const DnsResourceKey *key, char *buf, size_t buf_size) { |
1c02e7ba | 317 | const char *c, *t; |
202b76ae | 318 | char *ans = buf; |
2d4c5cbc | 319 | |
6af47493 LP |
320 | /* If we cannot convert the CLASS/TYPE into a known string, |
321 | use the format recommended by RFC 3597, Section 5. */ | |
322 | ||
2d4c5cbc | 323 | c = dns_class_to_string(key->class); |
2d4c5cbc | 324 | t = dns_type_to_string(key->type); |
2d4c5cbc | 325 | |
121ed16c LB |
326 | (void) snprintf(buf, buf_size, "%s %s%s%.0u %s%s%.0u", |
327 | dns_resource_key_name(key), | |
328 | strempty(c), c ? "" : "CLASS", c ? 0 : key->class, | |
329 | strempty(t), t ? "" : "TYPE", t ? 0 : key->type); | |
2d4c5cbc | 330 | |
202b76ae | 331 | return ans; |
2d4c5cbc LP |
332 | } |
333 | ||
f57e3cd5 LP |
334 | bool dns_resource_key_reduce(DnsResourceKey **a, DnsResourceKey **b) { |
335 | assert(a); | |
336 | assert(b); | |
337 | ||
338 | /* Try to replace one RR key by another if they are identical, thus saving a bit of memory. Note that we do | |
339 | * this only for RR keys, not for RRs themselves, as they carry a lot of additional metadata (where they come | |
340 | * from, validity data, and suchlike), and cannot be replaced so easily by other RRs that have the same | |
341 | * superficial data. */ | |
342 | ||
343 | if (!*a) | |
344 | return false; | |
345 | if (!*b) | |
346 | return false; | |
347 | ||
348 | /* We refuse merging const keys */ | |
f5fbe71d | 349 | if ((*a)->n_ref == UINT_MAX) |
f57e3cd5 | 350 | return false; |
f5fbe71d | 351 | if ((*b)->n_ref == UINT_MAX) |
f57e3cd5 LP |
352 | return false; |
353 | ||
354 | /* Already the same? */ | |
355 | if (*a == *b) | |
356 | return true; | |
357 | ||
358 | /* Are they really identical? */ | |
359 | if (dns_resource_key_equal(*a, *b) <= 0) | |
360 | return false; | |
361 | ||
362 | /* Keep the one which already has more references. */ | |
363 | if ((*a)->n_ref > (*b)->n_ref) { | |
364 | dns_resource_key_unref(*b); | |
365 | *b = dns_resource_key_ref(*a); | |
366 | } else { | |
367 | dns_resource_key_unref(*a); | |
368 | *a = dns_resource_key_ref(*b); | |
369 | } | |
370 | ||
371 | return true; | |
372 | } | |
373 | ||
faa133f3 | 374 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { |
74b2466e LP |
375 | DnsResourceRecord *rr; |
376 | ||
1ed31408 | 377 | rr = new(DnsResourceRecord, 1); |
74b2466e LP |
378 | if (!rr) |
379 | return NULL; | |
380 | ||
1ed31408 LP |
381 | *rr = (DnsResourceRecord) { |
382 | .n_ref = 1, | |
383 | .key = dns_resource_key_ref(key), | |
384 | .expiry = USEC_INFINITY, | |
98e80bf9 ZJS |
385 | .n_skip_labels_signer = UINT8_MAX, |
386 | .n_skip_labels_source = UINT8_MAX, | |
1ed31408 | 387 | }; |
faa133f3 | 388 | |
74b2466e LP |
389 | return rr; |
390 | } | |
391 | ||
8bf52d3d LP |
392 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) { |
393 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
394 | ||
395 | key = dns_resource_key_new(class, type, name); | |
396 | if (!key) | |
397 | return NULL; | |
398 | ||
399 | return dns_resource_record_new(key); | |
400 | } | |
401 | ||
8301aa0b YW |
402 | static DnsResourceRecord* dns_resource_record_free(DnsResourceRecord *rr) { |
403 | assert(rr); | |
74b2466e | 404 | |
faa133f3 | 405 | if (rr->key) { |
9de3e329 | 406 | switch(rr->key->type) { |
9c92ce6d LP |
407 | |
408 | case DNS_TYPE_SRV: | |
409 | free(rr->srv.name); | |
410 | break; | |
411 | ||
9de3e329 ZJS |
412 | case DNS_TYPE_PTR: |
413 | case DNS_TYPE_NS: | |
414 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 415 | case DNS_TYPE_DNAME: |
faa133f3 | 416 | free(rr->ptr.name); |
9de3e329 | 417 | break; |
9c92ce6d | 418 | |
9de3e329 | 419 | case DNS_TYPE_HINFO: |
faa133f3 LP |
420 | free(rr->hinfo.cpu); |
421 | free(rr->hinfo.os); | |
9de3e329 | 422 | break; |
9c92ce6d | 423 | |
9de3e329 | 424 | case DNS_TYPE_TXT: |
9c92ce6d | 425 | case DNS_TYPE_SPF: |
2001c805 | 426 | dns_txt_item_free_all(rr->txt.items); |
9de3e329 | 427 | break; |
9c92ce6d | 428 | |
9de3e329 | 429 | case DNS_TYPE_SOA: |
7e8e0422 LP |
430 | free(rr->soa.mname); |
431 | free(rr->soa.rname); | |
9de3e329 | 432 | break; |
9c92ce6d | 433 | |
9de3e329 | 434 | case DNS_TYPE_MX: |
946c7094 | 435 | free(rr->mx.exchange); |
9de3e329 | 436 | break; |
9c92ce6d | 437 | |
abf126a3 TG |
438 | case DNS_TYPE_DS: |
439 | free(rr->ds.digest); | |
440 | break; | |
441 | ||
42cc2eeb | 442 | case DNS_TYPE_SSHFP: |
549c1a25 | 443 | free(rr->sshfp.fingerprint); |
42cc2eeb LP |
444 | break; |
445 | ||
8db0d2f5 ZJS |
446 | case DNS_TYPE_DNSKEY: |
447 | free(rr->dnskey.key); | |
448 | break; | |
449 | ||
151226ab ZJS |
450 | case DNS_TYPE_RRSIG: |
451 | free(rr->rrsig.signer); | |
452 | free(rr->rrsig.signature); | |
453 | break; | |
454 | ||
50f1e641 TG |
455 | case DNS_TYPE_NSEC: |
456 | free(rr->nsec.next_domain_name); | |
457 | bitmap_free(rr->nsec.types); | |
458 | break; | |
459 | ||
5d45a880 TG |
460 | case DNS_TYPE_NSEC3: |
461 | free(rr->nsec3.next_hashed_name); | |
462 | free(rr->nsec3.salt); | |
463 | bitmap_free(rr->nsec3.types); | |
464 | break; | |
465 | ||
0dae31d4 | 466 | case DNS_TYPE_LOC: |
9de3e329 ZJS |
467 | case DNS_TYPE_A: |
468 | case DNS_TYPE_AAAA: | |
469 | break; | |
9c92ce6d | 470 | |
48d45d2b ZJS |
471 | case DNS_TYPE_TLSA: |
472 | free(rr->tlsa.data); | |
473 | break; | |
474 | ||
95052df3 ZJS |
475 | case DNS_TYPE_CAA: |
476 | free(rr->caa.tag); | |
477 | free(rr->caa.value); | |
478 | break; | |
479 | ||
d93a16b8 | 480 | case DNS_TYPE_OPENPGPKEY: |
9de3e329 | 481 | default: |
52e085af | 482 | if (!rr->unparsable) |
bfc1d734 | 483 | free(rr->generic.data); |
9de3e329 | 484 | } |
322345fd | 485 | |
52e085af | 486 | if (rr->unparsable) |
bfc1d734 ZJS |
487 | free(rr->generic.data); |
488 | ||
a8812dd7 | 489 | free(rr->wire_format); |
faa133f3 LP |
490 | dns_resource_key_unref(rr->key); |
491 | } | |
322345fd | 492 | |
7b50eb2e | 493 | free(rr->to_string); |
6b430fdb | 494 | return mfree(rr); |
322345fd LP |
495 | } |
496 | ||
8301aa0b YW |
497 | DEFINE_TRIVIAL_REF_UNREF_FUNC(DnsResourceRecord, dns_resource_record, dns_resource_record_free); |
498 | ||
623a4c97 LP |
499 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) { |
500 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
501 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; | |
502 | _cleanup_free_ char *ptr = NULL; | |
503 | int r; | |
504 | ||
505 | assert(ret); | |
506 | assert(address); | |
507 | assert(hostname); | |
508 | ||
509 | r = dns_name_reverse(family, address, &ptr); | |
510 | if (r < 0) | |
511 | return r; | |
512 | ||
513 | key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr); | |
514 | if (!key) | |
515 | return -ENOMEM; | |
516 | ||
517 | ptr = NULL; | |
518 | ||
519 | rr = dns_resource_record_new(key); | |
520 | if (!rr) | |
521 | return -ENOMEM; | |
522 | ||
523 | rr->ptr.name = strdup(hostname); | |
524 | if (!rr->ptr.name) | |
525 | return -ENOMEM; | |
526 | ||
1cc6c93a | 527 | *ret = TAKE_PTR(rr); |
623a4c97 LP |
528 | |
529 | return 0; | |
530 | } | |
531 | ||
78c6a153 LP |
532 | int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name) { |
533 | DnsResourceRecord *rr; | |
534 | ||
535 | assert(ret); | |
536 | assert(address); | |
537 | assert(family); | |
538 | ||
539 | if (family == AF_INET) { | |
540 | ||
541 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, name); | |
542 | if (!rr) | |
543 | return -ENOMEM; | |
544 | ||
545 | rr->a.in_addr = address->in; | |
546 | ||
547 | } else if (family == AF_INET6) { | |
548 | ||
549 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, name); | |
550 | if (!rr) | |
551 | return -ENOMEM; | |
552 | ||
553 | rr->aaaa.in6_addr = address->in6; | |
554 | } else | |
555 | return -EAFNOSUPPORT; | |
556 | ||
557 | *ret = rr; | |
558 | ||
559 | return 0; | |
560 | } | |
561 | ||
a43a068a ZJS |
562 | #define FIELD_EQUAL(a, b, field) \ |
563 | ((a).field ## _size == (b).field ## _size && \ | |
9bd2422a | 564 | memcmp_safe((a).field, (b).field, (a).field ## _size) == 0) |
a43a068a | 565 | |
51969a58 | 566 | int dns_resource_record_payload_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { |
322345fd LP |
567 | int r; |
568 | ||
51969a58 | 569 | /* Check if a and b are the same, but don't look at their keys */ |
322345fd | 570 | |
52e085af | 571 | if (a->unparsable != b->unparsable) |
fd0b4602 LP |
572 | return 0; |
573 | ||
52e085af | 574 | switch (a->unparsable ? _DNS_TYPE_INVALID : a->key->type) { |
2d4c5cbc | 575 | |
9c92ce6d LP |
576 | case DNS_TYPE_SRV: |
577 | r = dns_name_equal(a->srv.name, b->srv.name); | |
578 | if (r <= 0) | |
579 | return r; | |
580 | ||
581 | return a->srv.priority == b->srv.priority && | |
582 | a->srv.weight == b->srv.weight && | |
583 | a->srv.port == b->srv.port; | |
584 | ||
2d4c5cbc LP |
585 | case DNS_TYPE_PTR: |
586 | case DNS_TYPE_NS: | |
587 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 588 | case DNS_TYPE_DNAME: |
322345fd | 589 | return dns_name_equal(a->ptr.name, b->ptr.name); |
2d4c5cbc LP |
590 | |
591 | case DNS_TYPE_HINFO: | |
592 | return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && | |
593 | strcaseeq(a->hinfo.os, b->hinfo.os); | |
594 | ||
9de3e329 | 595 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
0f84a72e | 596 | case DNS_TYPE_TXT: |
2001c805 | 597 | return dns_txt_item_equal(a->txt.items, b->txt.items); |
2e276efc | 598 | |
2d4c5cbc | 599 | case DNS_TYPE_A: |
322345fd | 600 | return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; |
2d4c5cbc LP |
601 | |
602 | case DNS_TYPE_AAAA: | |
322345fd | 603 | return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; |
2d4c5cbc LP |
604 | |
605 | case DNS_TYPE_SOA: | |
7e8e0422 LP |
606 | r = dns_name_equal(a->soa.mname, b->soa.mname); |
607 | if (r <= 0) | |
608 | return r; | |
609 | r = dns_name_equal(a->soa.rname, b->soa.rname); | |
610 | if (r <= 0) | |
611 | return r; | |
612 | ||
613 | return a->soa.serial == b->soa.serial && | |
614 | a->soa.refresh == b->soa.refresh && | |
615 | a->soa.retry == b->soa.retry && | |
616 | a->soa.expire == b->soa.expire && | |
617 | a->soa.minimum == b->soa.minimum; | |
9c92ce6d | 618 | |
946c7094 ZJS |
619 | case DNS_TYPE_MX: |
620 | if (a->mx.priority != b->mx.priority) | |
621 | return 0; | |
622 | ||
623 | return dns_name_equal(a->mx.exchange, b->mx.exchange); | |
624 | ||
0dae31d4 ZJS |
625 | case DNS_TYPE_LOC: |
626 | assert(a->loc.version == b->loc.version); | |
627 | ||
628 | return a->loc.size == b->loc.size && | |
629 | a->loc.horiz_pre == b->loc.horiz_pre && | |
630 | a->loc.vert_pre == b->loc.vert_pre && | |
631 | a->loc.latitude == b->loc.latitude && | |
632 | a->loc.longitude == b->loc.longitude && | |
633 | a->loc.altitude == b->loc.altitude; | |
634 | ||
abf126a3 TG |
635 | case DNS_TYPE_DS: |
636 | return a->ds.key_tag == b->ds.key_tag && | |
637 | a->ds.algorithm == b->ds.algorithm && | |
638 | a->ds.digest_type == b->ds.digest_type && | |
a43a068a | 639 | FIELD_EQUAL(a->ds, b->ds, digest); |
abf126a3 | 640 | |
42cc2eeb LP |
641 | case DNS_TYPE_SSHFP: |
642 | return a->sshfp.algorithm == b->sshfp.algorithm && | |
643 | a->sshfp.fptype == b->sshfp.fptype && | |
a43a068a | 644 | FIELD_EQUAL(a->sshfp, b->sshfp, fingerprint); |
42cc2eeb | 645 | |
8db0d2f5 | 646 | case DNS_TYPE_DNSKEY: |
f91dc240 LP |
647 | return a->dnskey.flags == b->dnskey.flags && |
648 | a->dnskey.protocol == b->dnskey.protocol && | |
8db0d2f5 | 649 | a->dnskey.algorithm == b->dnskey.algorithm && |
a43a068a | 650 | FIELD_EQUAL(a->dnskey, b->dnskey, key); |
8db0d2f5 | 651 | |
151226ab ZJS |
652 | case DNS_TYPE_RRSIG: |
653 | /* do the fast comparisons first */ | |
a43a068a ZJS |
654 | return a->rrsig.type_covered == b->rrsig.type_covered && |
655 | a->rrsig.algorithm == b->rrsig.algorithm && | |
656 | a->rrsig.labels == b->rrsig.labels && | |
657 | a->rrsig.original_ttl == b->rrsig.original_ttl && | |
658 | a->rrsig.expiration == b->rrsig.expiration && | |
659 | a->rrsig.inception == b->rrsig.inception && | |
660 | a->rrsig.key_tag == b->rrsig.key_tag && | |
661 | FIELD_EQUAL(a->rrsig, b->rrsig, signature) && | |
662 | dns_name_equal(a->rrsig.signer, b->rrsig.signer); | |
151226ab | 663 | |
50f1e641 TG |
664 | case DNS_TYPE_NSEC: |
665 | return dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name) && | |
666 | bitmap_equal(a->nsec.types, b->nsec.types); | |
667 | ||
5d45a880 TG |
668 | case DNS_TYPE_NSEC3: |
669 | return a->nsec3.algorithm == b->nsec3.algorithm && | |
a43a068a ZJS |
670 | a->nsec3.flags == b->nsec3.flags && |
671 | a->nsec3.iterations == b->nsec3.iterations && | |
672 | FIELD_EQUAL(a->nsec3, b->nsec3, salt) && | |
673 | FIELD_EQUAL(a->nsec3, b->nsec3, next_hashed_name) && | |
674 | bitmap_equal(a->nsec3.types, b->nsec3.types); | |
5d45a880 | 675 | |
48d45d2b ZJS |
676 | case DNS_TYPE_TLSA: |
677 | return a->tlsa.cert_usage == b->tlsa.cert_usage && | |
678 | a->tlsa.selector == b->tlsa.selector && | |
679 | a->tlsa.matching_type == b->tlsa.matching_type && | |
a43a068a | 680 | FIELD_EQUAL(a->tlsa, b->tlsa, data); |
48d45d2b | 681 | |
95052df3 ZJS |
682 | case DNS_TYPE_CAA: |
683 | return a->caa.flags == b->caa.flags && | |
684 | streq(a->caa.tag, b->caa.tag) && | |
685 | FIELD_EQUAL(a->caa, b->caa, value); | |
686 | ||
687 | case DNS_TYPE_OPENPGPKEY: | |
2d4c5cbc | 688 | default: |
a43a068a | 689 | return FIELD_EQUAL(a->generic, b->generic, data); |
2d4c5cbc | 690 | } |
322345fd LP |
691 | } |
692 | ||
51969a58 ZJS |
693 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { |
694 | int r; | |
695 | ||
696 | assert(a); | |
697 | assert(b); | |
698 | ||
699 | if (a == b) | |
700 | return 1; | |
701 | ||
702 | r = dns_resource_key_equal(a->key, b->key); | |
703 | if (r <= 0) | |
704 | return r; | |
705 | ||
706 | return dns_resource_record_payload_equal(a, b); | |
707 | } | |
708 | ||
0dae31d4 ZJS |
709 | static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude, |
710 | uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) { | |
711 | char *s; | |
712 | char NS = latitude >= 1U<<31 ? 'N' : 'S'; | |
713 | char EW = longitude >= 1U<<31 ? 'E' : 'W'; | |
714 | ||
715 | int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude); | |
716 | int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude); | |
717 | double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude); | |
718 | double siz = (size >> 4) * exp10((double) (size & 0xF)); | |
719 | double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF)); | |
720 | double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF)); | |
721 | ||
722 | if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm", | |
723 | (lat / 60000 / 60), | |
724 | (lat / 60000) % 60, | |
725 | (lat % 60000) / 1000., | |
726 | NS, | |
727 | (lon / 60000 / 60), | |
728 | (lon / 60000) % 60, | |
729 | (lon % 60000) / 1000., | |
730 | EW, | |
731 | alt / 100., | |
732 | siz / 100., | |
733 | hor / 100., | |
734 | ver / 100.) < 0) | |
735 | return NULL; | |
736 | ||
737 | return s; | |
738 | } | |
739 | ||
7c6423e1 TG |
740 | static int format_timestamp_dns(char *buf, size_t l, time_t sec) { |
741 | struct tm tm; | |
742 | ||
743 | assert(buf); | |
fbd0b64f | 744 | assert(l > STRLEN("YYYYMMDDHHmmSS")); |
7c6423e1 TG |
745 | |
746 | if (!gmtime_r(&sec, &tm)) | |
747 | return -EINVAL; | |
748 | ||
749 | if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0) | |
750 | return -EINVAL; | |
751 | ||
752 | return 0; | |
753 | } | |
754 | ||
50f1e641 TG |
755 | static char *format_types(Bitmap *types) { |
756 | _cleanup_strv_free_ char **strv = NULL; | |
757 | _cleanup_free_ char *str = NULL; | |
758 | unsigned type; | |
759 | int r; | |
760 | ||
90e74a66 | 761 | BITMAP_FOREACH(type, types) { |
50f1e641 | 762 | if (dns_type_to_string(type)) { |
2c1fb4f7 | 763 | r = strv_extend(&strv, dns_type_to_string(type)); |
50f1e641 TG |
764 | if (r < 0) |
765 | return NULL; | |
766 | } else { | |
767 | char *t; | |
768 | ||
769 | r = asprintf(&t, "TYPE%u", type); | |
770 | if (r < 0) | |
771 | return NULL; | |
772 | ||
2c1fb4f7 | 773 | r = strv_consume(&strv, t); |
50f1e641 TG |
774 | if (r < 0) |
775 | return NULL; | |
776 | } | |
777 | } | |
778 | ||
779 | str = strv_join(strv, " "); | |
780 | if (!str) | |
781 | return NULL; | |
782 | ||
605405c6 | 783 | return strjoin("( ", str, " )"); |
50f1e641 TG |
784 | } |
785 | ||
2001c805 | 786 | static char *format_txt(DnsTxtItem *first) { |
2001c805 LP |
787 | size_t c = 1; |
788 | char *p, *s; | |
789 | ||
790 | LIST_FOREACH(items, i, first) | |
791 | c += i->length * 4 + 3; | |
792 | ||
793 | p = s = new(char, c); | |
794 | if (!s) | |
795 | return NULL; | |
796 | ||
797 | LIST_FOREACH(items, i, first) { | |
2001c805 LP |
798 | if (i != first) |
799 | *(p++) = ' '; | |
800 | ||
801 | *(p++) = '"'; | |
802 | ||
6f1d18ae | 803 | for (size_t j = 0; j < i->length; j++) { |
2001c805 LP |
804 | if (i->data[j] < ' ' || i->data[j] == '"' || i->data[j] >= 127) { |
805 | *(p++) = '\\'; | |
806 | *(p++) = '0' + (i->data[j] / 100); | |
807 | *(p++) = '0' + ((i->data[j] / 10) % 10); | |
808 | *(p++) = '0' + (i->data[j] % 10); | |
809 | } else | |
810 | *(p++) = i->data[j]; | |
811 | } | |
812 | ||
813 | *(p++) = '"'; | |
814 | } | |
815 | ||
816 | *p = 0; | |
817 | return s; | |
818 | } | |
819 | ||
7b50eb2e | 820 | const char *dns_resource_record_to_string(DnsResourceRecord *rr) { |
bc833401 DT |
821 | _cleanup_free_ char *s = NULL, *t = NULL; |
822 | char k[DNS_RESOURCE_KEY_STRING_MAX]; | |
2d4c5cbc | 823 | int r; |
322345fd | 824 | |
2d4c5cbc | 825 | assert(rr); |
322345fd | 826 | |
7b50eb2e LP |
827 | if (rr->to_string) |
828 | return rr->to_string; | |
829 | ||
202b76ae | 830 | dns_resource_key_to_string(rr->key, k, sizeof(k)); |
322345fd | 831 | |
52e085af | 832 | switch (rr->unparsable ? _DNS_TYPE_INVALID : rr->key->type) { |
322345fd | 833 | |
9c92ce6d LP |
834 | case DNS_TYPE_SRV: |
835 | r = asprintf(&s, "%s %u %u %u %s", | |
836 | k, | |
837 | rr->srv.priority, | |
838 | rr->srv.weight, | |
839 | rr->srv.port, | |
840 | strna(rr->srv.name)); | |
841 | if (r < 0) | |
7b50eb2e | 842 | return NULL; |
9c92ce6d LP |
843 | break; |
844 | ||
2d4c5cbc LP |
845 | case DNS_TYPE_PTR: |
846 | case DNS_TYPE_NS: | |
847 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 848 | case DNS_TYPE_DNAME: |
605405c6 | 849 | s = strjoin(k, " ", rr->ptr.name); |
2d4c5cbc | 850 | if (!s) |
7b50eb2e | 851 | return NULL; |
322345fd | 852 | |
2d4c5cbc | 853 | break; |
322345fd | 854 | |
2d4c5cbc | 855 | case DNS_TYPE_HINFO: |
605405c6 | 856 | s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os); |
2d4c5cbc | 857 | if (!s) |
7b50eb2e | 858 | return NULL; |
2d4c5cbc | 859 | break; |
322345fd | 860 | |
9de3e329 | 861 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
8db0d2f5 | 862 | case DNS_TYPE_TXT: |
2001c805 | 863 | t = format_txt(rr->txt.items); |
2e276efc | 864 | if (!t) |
7b50eb2e | 865 | return NULL; |
2e276efc | 866 | |
605405c6 | 867 | s = strjoin(k, " ", t); |
2e276efc | 868 | if (!s) |
7b50eb2e | 869 | return NULL; |
2e276efc | 870 | break; |
2e276efc | 871 | |
037e5b15 DT |
872 | case DNS_TYPE_A: |
873 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &t); | |
2d4c5cbc | 874 | if (r < 0) |
7b50eb2e | 875 | return NULL; |
322345fd | 876 | |
037e5b15 | 877 | s = strjoin(k, " ", t); |
2d4c5cbc | 878 | if (!s) |
7b50eb2e | 879 | return NULL; |
2d4c5cbc | 880 | break; |
322345fd | 881 | |
8db0d2f5 ZJS |
882 | case DNS_TYPE_AAAA: |
883 | r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); | |
2d4c5cbc | 884 | if (r < 0) |
7b50eb2e | 885 | return NULL; |
322345fd | 886 | |
605405c6 | 887 | s = strjoin(k, " ", t); |
2d4c5cbc | 888 | if (!s) |
7b50eb2e | 889 | return NULL; |
2d4c5cbc | 890 | break; |
322345fd | 891 | |
2d4c5cbc LP |
892 | case DNS_TYPE_SOA: |
893 | r = asprintf(&s, "%s %s %s %u %u %u %u %u", | |
894 | k, | |
895 | strna(rr->soa.mname), | |
896 | strna(rr->soa.rname), | |
897 | rr->soa.serial, | |
898 | rr->soa.refresh, | |
899 | rr->soa.retry, | |
900 | rr->soa.expire, | |
901 | rr->soa.minimum); | |
902 | if (r < 0) | |
7b50eb2e | 903 | return NULL; |
2d4c5cbc LP |
904 | break; |
905 | ||
946c7094 ZJS |
906 | case DNS_TYPE_MX: |
907 | r = asprintf(&s, "%s %u %s", | |
908 | k, | |
909 | rr->mx.priority, | |
910 | rr->mx.exchange); | |
911 | if (r < 0) | |
7b50eb2e | 912 | return NULL; |
946c7094 ZJS |
913 | break; |
914 | ||
8db0d2f5 | 915 | case DNS_TYPE_LOC: |
0dae31d4 ZJS |
916 | assert(rr->loc.version == 0); |
917 | ||
8db0d2f5 ZJS |
918 | t = format_location(rr->loc.latitude, |
919 | rr->loc.longitude, | |
920 | rr->loc.altitude, | |
921 | rr->loc.size, | |
922 | rr->loc.horiz_pre, | |
923 | rr->loc.vert_pre); | |
924 | if (!t) | |
7b50eb2e | 925 | return NULL; |
0dae31d4 | 926 | |
605405c6 | 927 | s = strjoin(k, " ", t); |
0dae31d4 | 928 | if (!s) |
7b50eb2e | 929 | return NULL; |
0dae31d4 | 930 | break; |
0dae31d4 | 931 | |
abf126a3 TG |
932 | case DNS_TYPE_DS: |
933 | t = hexmem(rr->ds.digest, rr->ds.digest_size); | |
934 | if (!t) | |
7b50eb2e | 935 | return NULL; |
abf126a3 TG |
936 | |
937 | r = asprintf(&s, "%s %u %u %u %s", | |
938 | k, | |
939 | rr->ds.key_tag, | |
940 | rr->ds.algorithm, | |
941 | rr->ds.digest_type, | |
942 | t); | |
943 | if (r < 0) | |
7b50eb2e | 944 | return NULL; |
abf126a3 TG |
945 | break; |
946 | ||
8db0d2f5 | 947 | case DNS_TYPE_SSHFP: |
549c1a25 | 948 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); |
8db0d2f5 | 949 | if (!t) |
7b50eb2e | 950 | return NULL; |
42cc2eeb LP |
951 | |
952 | r = asprintf(&s, "%s %u %u %s", | |
953 | k, | |
954 | rr->sshfp.algorithm, | |
955 | rr->sshfp.fptype, | |
8db0d2f5 | 956 | t); |
42cc2eeb | 957 | if (r < 0) |
7b50eb2e | 958 | return NULL; |
42cc2eeb | 959 | break; |
42cc2eeb | 960 | |
ff3d6560 | 961 | case DNS_TYPE_DNSKEY: { |
8e54f5d9 | 962 | _cleanup_free_ char *alg = NULL; |
fc8eec10 ZJS |
963 | uint16_t key_tag; |
964 | ||
965 | key_tag = dnssec_keytag(rr, true); | |
ff3d6560 | 966 | |
8e54f5d9 LP |
967 | r = dnssec_algorithm_to_string_alloc(rr->dnskey.algorithm, &alg); |
968 | if (r < 0) | |
969 | return NULL; | |
ff3d6560 | 970 | |
516a00e9 | 971 | r = asprintf(&t, "%s %u %u %s", |
8db0d2f5 | 972 | k, |
f91dc240 LP |
973 | rr->dnskey.flags, |
974 | rr->dnskey.protocol, | |
4bb91a95 | 975 | alg); |
8db0d2f5 | 976 | if (r < 0) |
7b50eb2e | 977 | return NULL; |
d7671a3e | 978 | |
516a00e9 | 979 | r = base64_append(&t, r, |
d7671a3e ZJS |
980 | rr->dnskey.key, rr->dnskey.key_size, |
981 | 8, columns()); | |
982 | if (r < 0) | |
983 | return NULL; | |
984 | ||
516a00e9 | 985 | r = asprintf(&s, "%s\n" |
718af59e ZJS |
986 | " -- Flags:%s%s%s\n" |
987 | " -- Key tag: %u", | |
516a00e9 | 988 | t, |
99e5ca6d ZJS |
989 | rr->dnskey.flags & DNSKEY_FLAG_SEP ? " SEP" : "", |
990 | rr->dnskey.flags & DNSKEY_FLAG_REVOKE ? " REVOKE" : "", | |
fc8eec10 | 991 | rr->dnskey.flags & DNSKEY_FLAG_ZONE_KEY ? " ZONE_KEY" : "", |
fc8eec10 | 992 | key_tag); |
99e5ca6d ZJS |
993 | if (r < 0) |
994 | return NULL; | |
99e5ca6d | 995 | |
8db0d2f5 | 996 | break; |
ff3d6560 | 997 | } |
2d4c5cbc | 998 | |
151226ab | 999 | case DNS_TYPE_RRSIG: { |
8e54f5d9 | 1000 | _cleanup_free_ char *alg = NULL; |
fbd0b64f | 1001 | char expiration[STRLEN("YYYYMMDDHHmmSS") + 1], inception[STRLEN("YYYYMMDDHHmmSS") + 1]; |
8e54f5d9 | 1002 | const char *type; |
151226ab ZJS |
1003 | |
1004 | type = dns_type_to_string(rr->rrsig.type_covered); | |
8e54f5d9 LP |
1005 | |
1006 | r = dnssec_algorithm_to_string_alloc(rr->rrsig.algorithm, &alg); | |
1007 | if (r < 0) | |
1008 | return NULL; | |
151226ab | 1009 | |
7c6423e1 TG |
1010 | r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration); |
1011 | if (r < 0) | |
7b50eb2e | 1012 | return NULL; |
7c6423e1 TG |
1013 | |
1014 | r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception); | |
1015 | if (r < 0) | |
7b50eb2e | 1016 | return NULL; |
7c6423e1 | 1017 | |
151226ab ZJS |
1018 | /* TYPE?? follows |
1019 | * http://tools.ietf.org/html/rfc3597#section-5 */ | |
1020 | ||
4bb91a95 | 1021 | r = asprintf(&s, "%s %s%.*u %s %u %u %s %s %u %s", |
151226ab ZJS |
1022 | k, |
1023 | type ?: "TYPE", | |
1024 | type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, | |
8e54f5d9 | 1025 | alg, |
151226ab ZJS |
1026 | rr->rrsig.labels, |
1027 | rr->rrsig.original_ttl, | |
7c6423e1 TG |
1028 | expiration, |
1029 | inception, | |
151226ab | 1030 | rr->rrsig.key_tag, |
4bb91a95 | 1031 | rr->rrsig.signer); |
151226ab | 1032 | if (r < 0) |
7b50eb2e | 1033 | return NULL; |
d7671a3e | 1034 | |
4bb91a95 | 1035 | r = base64_append(&s, r, |
d7671a3e ZJS |
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 | ||
037e5b15 DT |
1118 | case DNS_TYPE_CAA: |
1119 | t = octescape(rr->caa.value, rr->caa.value_size); | |
1120 | if (!t) | |
95052df3 ZJS |
1121 | return NULL; |
1122 | ||
718af59e | 1123 | r = asprintf(&s, "%s %u %s \"%s\"%s%s%s%.0u", |
95052df3 ZJS |
1124 | k, |
1125 | rr->caa.flags, | |
1126 | rr->caa.tag, | |
037e5b15 | 1127 | t, |
718af59e ZJS |
1128 | rr->caa.flags ? "\n -- Flags:" : "", |
1129 | rr->caa.flags & CAA_FLAG_CRITICAL ? " critical" : "", | |
1130 | rr->caa.flags & ~CAA_FLAG_CRITICAL ? " " : "", | |
1131 | rr->caa.flags & ~CAA_FLAG_CRITICAL); | |
95052df3 ZJS |
1132 | if (r < 0) |
1133 | return NULL; | |
1134 | ||
1135 | break; | |
95052df3 | 1136 | |
eba1eb90 | 1137 | case DNS_TYPE_OPENPGPKEY: |
4bb91a95 | 1138 | r = asprintf(&s, "%s", k); |
d93a16b8 ZJS |
1139 | if (r < 0) |
1140 | return NULL; | |
1141 | ||
4bb91a95 | 1142 | r = base64_append(&s, r, |
a43a068a | 1143 | rr->generic.data, rr->generic.data_size, |
d93a16b8 ZJS |
1144 | 8, columns()); |
1145 | if (r < 0) | |
1146 | return NULL; | |
1147 | break; | |
d93a16b8 | 1148 | |
8db0d2f5 | 1149 | default: |
a43a068a | 1150 | t = hexmem(rr->generic.data, rr->generic.data_size); |
8db0d2f5 | 1151 | if (!t) |
7b50eb2e | 1152 | return NULL; |
8db0d2f5 | 1153 | |
6af47493 | 1154 | /* Format as documented in RFC 3597, Section 5 */ |
a43a068a | 1155 | r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.data_size, t); |
d23a27a9 | 1156 | if (r < 0) |
7b50eb2e | 1157 | return NULL; |
2d4c5cbc | 1158 | break; |
8db0d2f5 | 1159 | } |
2d4c5cbc | 1160 | |
7b50eb2e | 1161 | rr->to_string = s; |
bc833401 | 1162 | return TAKE_PTR(s); |
2d4c5cbc | 1163 | } |
322345fd | 1164 | |
2e74028a ZJS |
1165 | ssize_t dns_resource_record_payload(DnsResourceRecord *rr, void **out) { |
1166 | assert(rr); | |
1167 | assert(out); | |
1168 | ||
52e085af | 1169 | switch(rr->unparsable ? _DNS_TYPE_INVALID : rr->key->type) { |
2e74028a ZJS |
1170 | case DNS_TYPE_SRV: |
1171 | case DNS_TYPE_PTR: | |
1172 | case DNS_TYPE_NS: | |
1173 | case DNS_TYPE_CNAME: | |
1174 | case DNS_TYPE_DNAME: | |
1175 | case DNS_TYPE_HINFO: | |
1176 | case DNS_TYPE_SPF: | |
1177 | case DNS_TYPE_TXT: | |
1178 | case DNS_TYPE_A: | |
1179 | case DNS_TYPE_AAAA: | |
1180 | case DNS_TYPE_SOA: | |
1181 | case DNS_TYPE_MX: | |
1182 | case DNS_TYPE_LOC: | |
1183 | case DNS_TYPE_DS: | |
2e74028a ZJS |
1184 | case DNS_TYPE_DNSKEY: |
1185 | case DNS_TYPE_RRSIG: | |
1186 | case DNS_TYPE_NSEC: | |
1187 | case DNS_TYPE_NSEC3: | |
1188 | return -EINVAL; | |
1189 | ||
e1caa6e0 ZJS |
1190 | case DNS_TYPE_SSHFP: |
1191 | *out = rr->sshfp.fingerprint; | |
1192 | return rr->sshfp.fingerprint_size; | |
1193 | ||
2e74028a ZJS |
1194 | case DNS_TYPE_TLSA: |
1195 | *out = rr->tlsa.data; | |
1196 | return rr->tlsa.data_size; | |
1197 | ||
2e74028a ZJS |
1198 | case DNS_TYPE_OPENPGPKEY: |
1199 | default: | |
1200 | *out = rr->generic.data; | |
1201 | return rr->generic.data_size; | |
1202 | } | |
1203 | } | |
1204 | ||
a8812dd7 LP |
1205 | int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical) { |
1206 | ||
1207 | DnsPacket packet = { | |
1208 | .n_ref = 1, | |
1209 | .protocol = DNS_PROTOCOL_DNS, | |
1210 | .on_stack = true, | |
1211 | .refuse_compression = true, | |
1212 | .canonical_form = canonical, | |
1213 | }; | |
1214 | ||
1215 | size_t start, rds; | |
1216 | int r; | |
1217 | ||
1218 | assert(rr); | |
1219 | ||
1220 | /* Generates the RR in wire-format, optionally in the | |
1221 | * canonical form as discussed in the DNSSEC RFC 4034, Section | |
1222 | * 6.2. We allocate a throw-away DnsPacket object on the stack | |
1223 | * here, because we need some book-keeping for memory | |
1224 | * management, and can reuse the DnsPacket serializer, that | |
1225 | * can generate the canonical form, too, but also knows label | |
1226 | * compression and suchlike. */ | |
1227 | ||
1228 | if (rr->wire_format && rr->wire_format_canonical == canonical) | |
1229 | return 0; | |
1230 | ||
58ab31d5 | 1231 | r = dns_packet_append_rr(&packet, rr, 0, &start, &rds); |
a8812dd7 LP |
1232 | if (r < 0) |
1233 | return r; | |
1234 | ||
1235 | assert(start == 0); | |
1236 | assert(packet._data); | |
1237 | ||
1238 | free(rr->wire_format); | |
1239 | rr->wire_format = packet._data; | |
1240 | rr->wire_format_size = packet.size; | |
1241 | rr->wire_format_rdata_offset = rds; | |
1242 | rr->wire_format_canonical = canonical; | |
1243 | ||
1244 | packet._data = NULL; | |
1245 | dns_packet_unref(&packet); | |
1246 | ||
1247 | return 0; | |
1248 | } | |
1249 | ||
97c67192 LP |
1250 | int dns_resource_record_signer(DnsResourceRecord *rr, const char **ret) { |
1251 | const char *n; | |
1252 | int r; | |
1253 | ||
1254 | assert(rr); | |
1255 | assert(ret); | |
1256 | ||
1257 | /* Returns the RRset's signer, if it is known. */ | |
1258 | ||
98e80bf9 | 1259 | if (rr->n_skip_labels_signer == UINT8_MAX) |
97c67192 LP |
1260 | return -ENODATA; |
1261 | ||
1c02e7ba | 1262 | n = dns_resource_key_name(rr->key); |
97c67192 LP |
1263 | r = dns_name_skip(n, rr->n_skip_labels_signer, &n); |
1264 | if (r < 0) | |
1265 | return r; | |
1266 | if (r == 0) | |
1267 | return -EINVAL; | |
1268 | ||
1269 | *ret = n; | |
1270 | return 0; | |
1271 | } | |
1272 | ||
1273 | int dns_resource_record_source(DnsResourceRecord *rr, const char **ret) { | |
1274 | const char *n; | |
1275 | int r; | |
1276 | ||
1277 | assert(rr); | |
1278 | assert(ret); | |
1279 | ||
1280 | /* Returns the RRset's synthesizing source, if it is known. */ | |
1281 | ||
98e80bf9 | 1282 | if (rr->n_skip_labels_source == UINT8_MAX) |
97c67192 LP |
1283 | return -ENODATA; |
1284 | ||
1c02e7ba | 1285 | n = dns_resource_key_name(rr->key); |
97c67192 LP |
1286 | r = dns_name_skip(n, rr->n_skip_labels_source, &n); |
1287 | if (r < 0) | |
1288 | return r; | |
1289 | if (r == 0) | |
1290 | return -EINVAL; | |
1291 | ||
1292 | *ret = n; | |
1293 | return 0; | |
1294 | } | |
1295 | ||
1296 | int dns_resource_record_is_signer(DnsResourceRecord *rr, const char *zone) { | |
1297 | const char *signer; | |
1298 | int r; | |
1299 | ||
ab481675 LP |
1300 | assert(rr); |
1301 | ||
97c67192 LP |
1302 | r = dns_resource_record_signer(rr, &signer); |
1303 | if (r < 0) | |
1304 | return r; | |
1305 | ||
1306 | return dns_name_equal(zone, signer); | |
1307 | } | |
1308 | ||
ab481675 LP |
1309 | int dns_resource_record_is_synthetic(DnsResourceRecord *rr) { |
1310 | int r; | |
1311 | ||
1312 | assert(rr); | |
1313 | ||
1314 | /* Returns > 0 if the RR is generated from a wildcard, and is not the asterisk name itself */ | |
1315 | ||
98e80bf9 | 1316 | if (rr->n_skip_labels_source == UINT8_MAX) |
ab481675 LP |
1317 | return -ENODATA; |
1318 | ||
1319 | if (rr->n_skip_labels_source == 0) | |
1320 | return 0; | |
1321 | ||
1322 | if (rr->n_skip_labels_source > 1) | |
1323 | return 1; | |
1324 | ||
1c02e7ba | 1325 | r = dns_name_startswith(dns_resource_key_name(rr->key), "*"); |
ab481675 LP |
1326 | if (r < 0) |
1327 | return r; | |
1328 | ||
1329 | return !r; | |
1330 | } | |
1331 | ||
7a08d314 | 1332 | void dns_resource_record_hash_func(const DnsResourceRecord *rr, struct siphash *state) { |
c9c72065 LP |
1333 | assert(rr); |
1334 | ||
1335 | dns_resource_key_hash_func(rr->key, state); | |
1336 | ||
52e085af | 1337 | switch (rr->unparsable ? _DNS_TYPE_INVALID : rr->key->type) { |
c9c72065 LP |
1338 | |
1339 | case DNS_TYPE_SRV: | |
1340 | siphash24_compress(&rr->srv.priority, sizeof(rr->srv.priority), state); | |
1341 | siphash24_compress(&rr->srv.weight, sizeof(rr->srv.weight), state); | |
1342 | siphash24_compress(&rr->srv.port, sizeof(rr->srv.port), state); | |
1343 | dns_name_hash_func(rr->srv.name, state); | |
1344 | break; | |
1345 | ||
1346 | case DNS_TYPE_PTR: | |
1347 | case DNS_TYPE_NS: | |
1348 | case DNS_TYPE_CNAME: | |
1349 | case DNS_TYPE_DNAME: | |
1350 | dns_name_hash_func(rr->ptr.name, state); | |
1351 | break; | |
1352 | ||
1353 | case DNS_TYPE_HINFO: | |
1354 | string_hash_func(rr->hinfo.cpu, state); | |
1355 | string_hash_func(rr->hinfo.os, state); | |
1356 | break; | |
1357 | ||
1358 | case DNS_TYPE_TXT: | |
1359 | case DNS_TYPE_SPF: { | |
c9c72065 | 1360 | LIST_FOREACH(items, j, rr->txt.items) { |
b652ccca | 1361 | siphash24_compress_safe(j->data, j->length, state); |
c9c72065 | 1362 | |
d5115566 LP |
1363 | /* Add an extra NUL byte, so that "a" followed by "b" doesn't result in the same hash as "ab" |
1364 | * followed by "". */ | |
1365 | siphash24_compress_byte(0, state); | |
c9c72065 LP |
1366 | } |
1367 | break; | |
1368 | } | |
1369 | ||
1370 | case DNS_TYPE_A: | |
1371 | siphash24_compress(&rr->a.in_addr, sizeof(rr->a.in_addr), state); | |
1372 | break; | |
1373 | ||
1374 | case DNS_TYPE_AAAA: | |
1375 | siphash24_compress(&rr->aaaa.in6_addr, sizeof(rr->aaaa.in6_addr), state); | |
1376 | break; | |
1377 | ||
1378 | case DNS_TYPE_SOA: | |
1379 | dns_name_hash_func(rr->soa.mname, state); | |
1380 | dns_name_hash_func(rr->soa.rname, state); | |
1381 | siphash24_compress(&rr->soa.serial, sizeof(rr->soa.serial), state); | |
1382 | siphash24_compress(&rr->soa.refresh, sizeof(rr->soa.refresh), state); | |
1383 | siphash24_compress(&rr->soa.retry, sizeof(rr->soa.retry), state); | |
1384 | siphash24_compress(&rr->soa.expire, sizeof(rr->soa.expire), state); | |
1385 | siphash24_compress(&rr->soa.minimum, sizeof(rr->soa.minimum), state); | |
1386 | break; | |
1387 | ||
1388 | case DNS_TYPE_MX: | |
1389 | siphash24_compress(&rr->mx.priority, sizeof(rr->mx.priority), state); | |
1390 | dns_name_hash_func(rr->mx.exchange, state); | |
1391 | break; | |
1392 | ||
1393 | case DNS_TYPE_LOC: | |
1394 | siphash24_compress(&rr->loc.version, sizeof(rr->loc.version), state); | |
1395 | siphash24_compress(&rr->loc.size, sizeof(rr->loc.size), state); | |
1396 | siphash24_compress(&rr->loc.horiz_pre, sizeof(rr->loc.horiz_pre), state); | |
1397 | siphash24_compress(&rr->loc.vert_pre, sizeof(rr->loc.vert_pre), state); | |
1398 | siphash24_compress(&rr->loc.latitude, sizeof(rr->loc.latitude), state); | |
1399 | siphash24_compress(&rr->loc.longitude, sizeof(rr->loc.longitude), state); | |
1400 | siphash24_compress(&rr->loc.altitude, sizeof(rr->loc.altitude), state); | |
1401 | break; | |
1402 | ||
1403 | case DNS_TYPE_SSHFP: | |
1404 | siphash24_compress(&rr->sshfp.algorithm, sizeof(rr->sshfp.algorithm), state); | |
1405 | siphash24_compress(&rr->sshfp.fptype, sizeof(rr->sshfp.fptype), state); | |
b652ccca | 1406 | siphash24_compress_safe(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size, state); |
c9c72065 LP |
1407 | break; |
1408 | ||
1409 | case DNS_TYPE_DNSKEY: | |
1410 | siphash24_compress(&rr->dnskey.flags, sizeof(rr->dnskey.flags), state); | |
1411 | siphash24_compress(&rr->dnskey.protocol, sizeof(rr->dnskey.protocol), state); | |
1412 | siphash24_compress(&rr->dnskey.algorithm, sizeof(rr->dnskey.algorithm), state); | |
b652ccca | 1413 | siphash24_compress_safe(rr->dnskey.key, rr->dnskey.key_size, state); |
c9c72065 LP |
1414 | break; |
1415 | ||
1416 | case DNS_TYPE_RRSIG: | |
1417 | siphash24_compress(&rr->rrsig.type_covered, sizeof(rr->rrsig.type_covered), state); | |
1418 | siphash24_compress(&rr->rrsig.algorithm, sizeof(rr->rrsig.algorithm), state); | |
1419 | siphash24_compress(&rr->rrsig.labels, sizeof(rr->rrsig.labels), state); | |
1420 | siphash24_compress(&rr->rrsig.original_ttl, sizeof(rr->rrsig.original_ttl), state); | |
1421 | siphash24_compress(&rr->rrsig.expiration, sizeof(rr->rrsig.expiration), state); | |
1422 | siphash24_compress(&rr->rrsig.inception, sizeof(rr->rrsig.inception), state); | |
1423 | siphash24_compress(&rr->rrsig.key_tag, sizeof(rr->rrsig.key_tag), state); | |
1424 | dns_name_hash_func(rr->rrsig.signer, state); | |
b652ccca | 1425 | siphash24_compress_safe(rr->rrsig.signature, rr->rrsig.signature_size, state); |
c9c72065 LP |
1426 | break; |
1427 | ||
1428 | case DNS_TYPE_NSEC: | |
1429 | dns_name_hash_func(rr->nsec.next_domain_name, state); | |
1430 | /* FIXME: we leave out the type bitmap here. Hash | |
1431 | * would be better if we'd take it into account | |
1432 | * too. */ | |
1433 | break; | |
1434 | ||
1435 | case DNS_TYPE_DS: | |
1436 | siphash24_compress(&rr->ds.key_tag, sizeof(rr->ds.key_tag), state); | |
1437 | siphash24_compress(&rr->ds.algorithm, sizeof(rr->ds.algorithm), state); | |
1438 | siphash24_compress(&rr->ds.digest_type, sizeof(rr->ds.digest_type), state); | |
b652ccca | 1439 | siphash24_compress_safe(rr->ds.digest, rr->ds.digest_size, state); |
c9c72065 LP |
1440 | break; |
1441 | ||
1442 | case DNS_TYPE_NSEC3: | |
1443 | siphash24_compress(&rr->nsec3.algorithm, sizeof(rr->nsec3.algorithm), state); | |
1444 | siphash24_compress(&rr->nsec3.flags, sizeof(rr->nsec3.flags), state); | |
1445 | siphash24_compress(&rr->nsec3.iterations, sizeof(rr->nsec3.iterations), state); | |
b652ccca YW |
1446 | siphash24_compress_safe(rr->nsec3.salt, rr->nsec3.salt_size, state); |
1447 | siphash24_compress_safe(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, state); | |
c9c72065 LP |
1448 | /* FIXME: We leave the bitmaps out */ |
1449 | break; | |
48d45d2b ZJS |
1450 | |
1451 | case DNS_TYPE_TLSA: | |
1452 | siphash24_compress(&rr->tlsa.cert_usage, sizeof(rr->tlsa.cert_usage), state); | |
1453 | siphash24_compress(&rr->tlsa.selector, sizeof(rr->tlsa.selector), state); | |
1454 | siphash24_compress(&rr->tlsa.matching_type, sizeof(rr->tlsa.matching_type), state); | |
b652ccca | 1455 | siphash24_compress_safe(rr->tlsa.data, rr->tlsa.data_size, state); |
48d45d2b | 1456 | break; |
c9c72065 | 1457 | |
95052df3 ZJS |
1458 | case DNS_TYPE_CAA: |
1459 | siphash24_compress(&rr->caa.flags, sizeof(rr->caa.flags), state); | |
1460 | string_hash_func(rr->caa.tag, state); | |
b652ccca | 1461 | siphash24_compress_safe(rr->caa.value, rr->caa.value_size, state); |
48d45d2b | 1462 | break; |
c9c72065 | 1463 | |
d93a16b8 | 1464 | case DNS_TYPE_OPENPGPKEY: |
c9c72065 | 1465 | default: |
b652ccca | 1466 | siphash24_compress_safe(rr->generic.data, rr->generic.data_size, state); |
c9c72065 LP |
1467 | break; |
1468 | } | |
1469 | } | |
1470 | ||
ae45e1a3 | 1471 | int dns_resource_record_compare_func(const DnsResourceRecord *x, const DnsResourceRecord *y) { |
7a08d314 | 1472 | int r; |
c9c72065 | 1473 | |
7a08d314 YW |
1474 | r = dns_resource_key_compare_func(x->key, y->key); |
1475 | if (r != 0) | |
1476 | return r; | |
c9c72065 | 1477 | |
cd70fc37 | 1478 | if (dns_resource_record_payload_equal(x, y) > 0) |
c9c72065 LP |
1479 | return 0; |
1480 | ||
53c5797f FB |
1481 | /* We still use CMP() here, even though don't implement proper |
1482 | * ordering, since the hashtable doesn't need ordering anyway. */ | |
1483 | return CMP(x, y); | |
c9c72065 LP |
1484 | } |
1485 | ||
7a08d314 | 1486 | DEFINE_HASH_OPS(dns_resource_record_hash_ops, DnsResourceRecord, dns_resource_record_hash_func, dns_resource_record_compare_func); |
c9c72065 | 1487 | |
17c8de63 LP |
1488 | DnsResourceRecord *dns_resource_record_copy(DnsResourceRecord *rr) { |
1489 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *copy = NULL; | |
1490 | DnsResourceRecord *t; | |
1491 | ||
1492 | assert(rr); | |
1493 | ||
1494 | copy = dns_resource_record_new(rr->key); | |
1495 | if (!copy) | |
1496 | return NULL; | |
1497 | ||
1498 | copy->ttl = rr->ttl; | |
1499 | copy->expiry = rr->expiry; | |
1500 | copy->n_skip_labels_signer = rr->n_skip_labels_signer; | |
1501 | copy->n_skip_labels_source = rr->n_skip_labels_source; | |
52e085af | 1502 | copy->unparsable = rr->unparsable; |
17c8de63 | 1503 | |
52e085af | 1504 | switch (rr->unparsable ? _DNS_TYPE_INVALID : rr->key->type) { |
17c8de63 LP |
1505 | |
1506 | case DNS_TYPE_SRV: | |
1507 | copy->srv.priority = rr->srv.priority; | |
1508 | copy->srv.weight = rr->srv.weight; | |
1509 | copy->srv.port = rr->srv.port; | |
1510 | copy->srv.name = strdup(rr->srv.name); | |
1511 | if (!copy->srv.name) | |
1512 | return NULL; | |
1513 | break; | |
1514 | ||
1515 | case DNS_TYPE_PTR: | |
1516 | case DNS_TYPE_NS: | |
1517 | case DNS_TYPE_CNAME: | |
1518 | case DNS_TYPE_DNAME: | |
1519 | copy->ptr.name = strdup(rr->ptr.name); | |
1520 | if (!copy->ptr.name) | |
1521 | return NULL; | |
1522 | break; | |
1523 | ||
1524 | case DNS_TYPE_HINFO: | |
1525 | copy->hinfo.cpu = strdup(rr->hinfo.cpu); | |
1526 | if (!copy->hinfo.cpu) | |
1527 | return NULL; | |
1528 | ||
1529 | copy->hinfo.os = strdup(rr->hinfo.os); | |
508f63b4 | 1530 | if (!copy->hinfo.os) |
17c8de63 LP |
1531 | return NULL; |
1532 | break; | |
1533 | ||
1534 | case DNS_TYPE_TXT: | |
1535 | case DNS_TYPE_SPF: | |
1536 | copy->txt.items = dns_txt_item_copy(rr->txt.items); | |
1537 | if (!copy->txt.items) | |
1538 | return NULL; | |
1539 | break; | |
1540 | ||
1541 | case DNS_TYPE_A: | |
1542 | copy->a = rr->a; | |
1543 | break; | |
1544 | ||
1545 | case DNS_TYPE_AAAA: | |
1546 | copy->aaaa = rr->aaaa; | |
1547 | break; | |
1548 | ||
1549 | case DNS_TYPE_SOA: | |
1550 | copy->soa.mname = strdup(rr->soa.mname); | |
1551 | if (!copy->soa.mname) | |
1552 | return NULL; | |
1553 | copy->soa.rname = strdup(rr->soa.rname); | |
1554 | if (!copy->soa.rname) | |
1555 | return NULL; | |
1556 | copy->soa.serial = rr->soa.serial; | |
1557 | copy->soa.refresh = rr->soa.refresh; | |
1558 | copy->soa.retry = rr->soa.retry; | |
1559 | copy->soa.expire = rr->soa.expire; | |
1560 | copy->soa.minimum = rr->soa.minimum; | |
1561 | break; | |
1562 | ||
1563 | case DNS_TYPE_MX: | |
1564 | copy->mx.priority = rr->mx.priority; | |
1565 | copy->mx.exchange = strdup(rr->mx.exchange); | |
1566 | if (!copy->mx.exchange) | |
1567 | return NULL; | |
1568 | break; | |
1569 | ||
1570 | case DNS_TYPE_LOC: | |
1571 | copy->loc = rr->loc; | |
1572 | break; | |
1573 | ||
1574 | case DNS_TYPE_SSHFP: | |
1575 | copy->sshfp.algorithm = rr->sshfp.algorithm; | |
1576 | copy->sshfp.fptype = rr->sshfp.fptype; | |
1577 | copy->sshfp.fingerprint = memdup(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); | |
1578 | if (!copy->sshfp.fingerprint) | |
1579 | return NULL; | |
1580 | copy->sshfp.fingerprint_size = rr->sshfp.fingerprint_size; | |
1581 | break; | |
1582 | ||
1583 | case DNS_TYPE_DNSKEY: | |
1584 | copy->dnskey.flags = rr->dnskey.flags; | |
1585 | copy->dnskey.protocol = rr->dnskey.protocol; | |
1586 | copy->dnskey.algorithm = rr->dnskey.algorithm; | |
1587 | copy->dnskey.key = memdup(rr->dnskey.key, rr->dnskey.key_size); | |
1588 | if (!copy->dnskey.key) | |
1589 | return NULL; | |
1590 | copy->dnskey.key_size = rr->dnskey.key_size; | |
1591 | break; | |
1592 | ||
1593 | case DNS_TYPE_RRSIG: | |
1594 | copy->rrsig.type_covered = rr->rrsig.type_covered; | |
1595 | copy->rrsig.algorithm = rr->rrsig.algorithm; | |
1596 | copy->rrsig.labels = rr->rrsig.labels; | |
1597 | copy->rrsig.original_ttl = rr->rrsig.original_ttl; | |
1598 | copy->rrsig.expiration = rr->rrsig.expiration; | |
1599 | copy->rrsig.inception = rr->rrsig.inception; | |
1600 | copy->rrsig.key_tag = rr->rrsig.key_tag; | |
1601 | copy->rrsig.signer = strdup(rr->rrsig.signer); | |
1602 | if (!copy->rrsig.signer) | |
1603 | return NULL; | |
1604 | copy->rrsig.signature = memdup(rr->rrsig.signature, rr->rrsig.signature_size); | |
1605 | if (!copy->rrsig.signature) | |
1606 | return NULL; | |
1607 | copy->rrsig.signature_size = rr->rrsig.signature_size; | |
1608 | break; | |
1609 | ||
1610 | case DNS_TYPE_NSEC: | |
1611 | copy->nsec.next_domain_name = strdup(rr->nsec.next_domain_name); | |
1612 | if (!copy->nsec.next_domain_name) | |
1613 | return NULL; | |
1f00a50c AT |
1614 | if (rr->nsec.types) { |
1615 | copy->nsec.types = bitmap_copy(rr->nsec.types); | |
1616 | if (!copy->nsec.types) | |
1617 | return NULL; | |
1618 | } | |
17c8de63 LP |
1619 | break; |
1620 | ||
1621 | case DNS_TYPE_DS: | |
1622 | copy->ds.key_tag = rr->ds.key_tag; | |
1623 | copy->ds.algorithm = rr->ds.algorithm; | |
1624 | copy->ds.digest_type = rr->ds.digest_type; | |
1625 | copy->ds.digest = memdup(rr->ds.digest, rr->ds.digest_size); | |
1626 | if (!copy->ds.digest) | |
1627 | return NULL; | |
1628 | copy->ds.digest_size = rr->ds.digest_size; | |
1629 | break; | |
1630 | ||
1631 | case DNS_TYPE_NSEC3: | |
1632 | copy->nsec3.algorithm = rr->nsec3.algorithm; | |
1633 | copy->nsec3.flags = rr->nsec3.flags; | |
1634 | copy->nsec3.iterations = rr->nsec3.iterations; | |
1635 | copy->nsec3.salt = memdup(rr->nsec3.salt, rr->nsec3.salt_size); | |
1636 | if (!copy->nsec3.salt) | |
1637 | return NULL; | |
1638 | copy->nsec3.salt_size = rr->nsec3.salt_size; | |
1639 | copy->nsec3.next_hashed_name = memdup(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size); | |
a63a1252 | 1640 | if (!copy->nsec3.next_hashed_name) |
17c8de63 LP |
1641 | return NULL; |
1642 | copy->nsec3.next_hashed_name_size = rr->nsec3.next_hashed_name_size; | |
1f00a50c AT |
1643 | if (rr->nsec3.types) { |
1644 | copy->nsec3.types = bitmap_copy(rr->nsec3.types); | |
1645 | if (!copy->nsec3.types) | |
1646 | return NULL; | |
1647 | } | |
17c8de63 LP |
1648 | break; |
1649 | ||
1650 | case DNS_TYPE_TLSA: | |
1651 | copy->tlsa.cert_usage = rr->tlsa.cert_usage; | |
1652 | copy->tlsa.selector = rr->tlsa.selector; | |
1653 | copy->tlsa.matching_type = rr->tlsa.matching_type; | |
1654 | copy->tlsa.data = memdup(rr->tlsa.data, rr->tlsa.data_size); | |
1655 | if (!copy->tlsa.data) | |
1656 | return NULL; | |
1657 | copy->tlsa.data_size = rr->tlsa.data_size; | |
1658 | break; | |
1659 | ||
1660 | case DNS_TYPE_CAA: | |
1661 | copy->caa.flags = rr->caa.flags; | |
1662 | copy->caa.tag = strdup(rr->caa.tag); | |
1663 | if (!copy->caa.tag) | |
1664 | return NULL; | |
1665 | copy->caa.value = memdup(rr->caa.value, rr->caa.value_size); | |
1666 | if (!copy->caa.value) | |
1667 | return NULL; | |
1668 | copy->caa.value_size = rr->caa.value_size; | |
1669 | break; | |
1670 | ||
1671 | case DNS_TYPE_OPT: | |
1672 | default: | |
1673 | copy->generic.data = memdup(rr->generic.data, rr->generic.data_size); | |
1674 | if (!copy->generic.data) | |
1675 | return NULL; | |
1676 | copy->generic.data_size = rr->generic.data_size; | |
1677 | break; | |
1678 | } | |
1679 | ||
1cc6c93a | 1680 | t = TAKE_PTR(copy); |
17c8de63 LP |
1681 | |
1682 | return t; | |
1683 | } | |
1684 | ||
1685 | int dns_resource_record_clamp_ttl(DnsResourceRecord **rr, uint32_t max_ttl) { | |
1686 | DnsResourceRecord *old_rr, *new_rr; | |
1687 | uint32_t new_ttl; | |
1688 | ||
1689 | assert(rr); | |
1690 | old_rr = *rr; | |
1691 | ||
1692 | if (old_rr->key->type == DNS_TYPE_OPT) | |
1693 | return -EINVAL; | |
1694 | ||
1695 | new_ttl = MIN(old_rr->ttl, max_ttl); | |
1696 | if (new_ttl == old_rr->ttl) | |
1697 | return 0; | |
1698 | ||
1699 | if (old_rr->n_ref == 1) { | |
1700 | /* Patch in place */ | |
1701 | old_rr->ttl = new_ttl; | |
1702 | return 1; | |
1703 | } | |
1704 | ||
1705 | new_rr = dns_resource_record_copy(old_rr); | |
1706 | if (!new_rr) | |
1707 | return -ENOMEM; | |
1708 | ||
1709 | new_rr->ttl = new_ttl; | |
1710 | ||
1711 | dns_resource_record_unref(*rr); | |
1712 | *rr = new_rr; | |
1713 | ||
1714 | return 1; | |
1715 | } | |
1716 | ||
48662847 | 1717 | bool dns_resource_record_is_link_local_address(DnsResourceRecord *rr) { |
d1f8fbea | 1718 | assert(rr); |
48662847 LP |
1719 | |
1720 | if (rr->key->class != DNS_CLASS_IN) | |
1721 | return false; | |
1722 | ||
1723 | if (rr->key->type == DNS_TYPE_A) | |
1724 | return in4_addr_is_link_local(&rr->a.in_addr); | |
1725 | ||
1726 | if (rr->key->type == DNS_TYPE_AAAA) | |
94876904 | 1727 | return in6_addr_is_link_local(&rr->aaaa.in6_addr); |
48662847 LP |
1728 | |
1729 | return false; | |
1730 | } | |
1731 | ||
d1f8fbea LP |
1732 | int dns_resource_record_get_cname_target(DnsResourceKey *key, DnsResourceRecord *cname, char **ret) { |
1733 | _cleanup_free_ char *d = NULL; | |
1734 | int r; | |
1735 | ||
1736 | assert(key); | |
1737 | assert(cname); | |
1738 | ||
d2995826 LP |
1739 | /* Checks if the RR `cname` is a CNAME/DNAME RR that matches the specified `key`. If so, returns the |
1740 | * target domain. If not, returns -EUNATCH */ | |
1741 | ||
d1f8fbea LP |
1742 | if (key->class != cname->key->class && key->class != DNS_CLASS_ANY) |
1743 | return -EUNATCH; | |
1744 | ||
d2995826 LP |
1745 | if (!dns_type_may_redirect(key->type)) /* This key type is not subject to CNAME/DNAME redirection? |
1746 | * Then let's refuse right-away */ | |
1747 | return -EUNATCH; | |
1748 | ||
d1f8fbea LP |
1749 | if (cname->key->type == DNS_TYPE_CNAME) { |
1750 | r = dns_name_equal(dns_resource_key_name(key), | |
1751 | dns_resource_key_name(cname->key)); | |
1752 | if (r < 0) | |
1753 | return r; | |
1754 | if (r == 0) | |
1755 | return -EUNATCH; /* CNAME RR key doesn't actually match the original key */ | |
1756 | ||
1757 | d = strdup(cname->cname.name); | |
1758 | if (!d) | |
1759 | return -ENOMEM; | |
1760 | ||
1761 | } else if (cname->key->type == DNS_TYPE_DNAME) { | |
1762 | ||
1763 | r = dns_name_change_suffix( | |
1764 | dns_resource_key_name(key), | |
1765 | dns_resource_key_name(cname->key), | |
1766 | cname->dname.name, | |
1767 | &d); | |
1768 | if (r < 0) | |
1769 | return r; | |
1770 | if (r == 0) | |
1771 | return -EUNATCH; /* DNAME RR key doesn't actually match the original key */ | |
1772 | ||
1773 | } else | |
1774 | return -EUNATCH; /* Not a CNAME/DNAME RR, hence doesn't match the proposition either */ | |
1775 | ||
1776 | *ret = TAKE_PTR(d); | |
1777 | return 0; | |
1778 | } | |
1779 | ||
2001c805 LP |
1780 | DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i) { |
1781 | DnsTxtItem *n; | |
1782 | ||
1783 | if (!i) | |
1784 | return NULL; | |
1785 | ||
1786 | n = i->items_next; | |
1787 | ||
1788 | free(i); | |
1789 | return dns_txt_item_free_all(n); | |
1790 | } | |
1791 | ||
1792 | bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) { | |
1793 | ||
4d247a6c LP |
1794 | if (a == b) |
1795 | return true; | |
1796 | ||
2001c805 LP |
1797 | if (!a != !b) |
1798 | return false; | |
1799 | ||
1800 | if (!a) | |
1801 | return true; | |
1802 | ||
1803 | if (a->length != b->length) | |
1804 | return false; | |
1805 | ||
1806 | if (memcmp(a->data, b->data, a->length) != 0) | |
1807 | return false; | |
1808 | ||
1809 | return dns_txt_item_equal(a->items_next, b->items_next); | |
1810 | } | |
8730bccf | 1811 | |
17c8de63 | 1812 | DnsTxtItem *dns_txt_item_copy(DnsTxtItem *first) { |
03677889 | 1813 | DnsTxtItem *copy = NULL, *end = NULL; |
17c8de63 LP |
1814 | |
1815 | LIST_FOREACH(items, i, first) { | |
1816 | DnsTxtItem *j; | |
1817 | ||
1818 | j = memdup(i, offsetof(DnsTxtItem, data) + i->length + 1); | |
1819 | if (!j) { | |
1820 | dns_txt_item_free_all(copy); | |
1821 | return NULL; | |
1822 | } | |
1823 | ||
1824 | LIST_INSERT_AFTER(items, copy, end, j); | |
1825 | end = j; | |
1826 | } | |
1827 | ||
1828 | return copy; | |
1829 | } | |
1830 | ||
ebb779dc DR |
1831 | int dns_txt_item_new_empty(DnsTxtItem **ret) { |
1832 | DnsTxtItem *i; | |
1833 | ||
1834 | /* RFC 6763, section 6.1 suggests to treat | |
1835 | * empty TXT RRs as equivalent to a TXT record | |
1836 | * with a single empty string. */ | |
1837 | ||
1838 | i = malloc0(offsetof(DnsTxtItem, data) + 1); /* for safety reasons we add an extra NUL byte */ | |
1839 | if (!i) | |
1840 | return -ENOMEM; | |
1841 | ||
1842 | *ret = i; | |
1843 | ||
1844 | return 0; | |
1845 | } | |
1846 | ||
8730bccf | 1847 | static const char* const dnssec_algorithm_table[_DNSSEC_ALGORITHM_MAX_DEFINED] = { |
6f717d08 | 1848 | /* Mnemonics as listed on https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */ |
8730bccf LP |
1849 | [DNSSEC_ALGORITHM_RSAMD5] = "RSAMD5", |
1850 | [DNSSEC_ALGORITHM_DH] = "DH", | |
1851 | [DNSSEC_ALGORITHM_DSA] = "DSA", | |
1852 | [DNSSEC_ALGORITHM_ECC] = "ECC", | |
1853 | [DNSSEC_ALGORITHM_RSASHA1] = "RSASHA1", | |
1854 | [DNSSEC_ALGORITHM_DSA_NSEC3_SHA1] = "DSA-NSEC3-SHA1", | |
1855 | [DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1] = "RSASHA1-NSEC3-SHA1", | |
1856 | [DNSSEC_ALGORITHM_RSASHA256] = "RSASHA256", | |
1857 | [DNSSEC_ALGORITHM_RSASHA512] = "RSASHA512", | |
6f717d08 LP |
1858 | [DNSSEC_ALGORITHM_ECC_GOST] = "ECC-GOST", |
1859 | [DNSSEC_ALGORITHM_ECDSAP256SHA256] = "ECDSAP256SHA256", | |
1860 | [DNSSEC_ALGORITHM_ECDSAP384SHA384] = "ECDSAP384SHA384", | |
cb9eeb06 MCO |
1861 | [DNSSEC_ALGORITHM_ED25519] = "ED25519", |
1862 | [DNSSEC_ALGORITHM_ED448] = "ED448", | |
8730bccf LP |
1863 | [DNSSEC_ALGORITHM_INDIRECT] = "INDIRECT", |
1864 | [DNSSEC_ALGORITHM_PRIVATEDNS] = "PRIVATEDNS", | |
1865 | [DNSSEC_ALGORITHM_PRIVATEOID] = "PRIVATEOID", | |
1866 | }; | |
8e54f5d9 | 1867 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_algorithm, int, 255); |
8730bccf LP |
1868 | |
1869 | static const char* const dnssec_digest_table[_DNSSEC_DIGEST_MAX_DEFINED] = { | |
6f717d08 | 1870 | /* Names as listed on https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml */ |
e3e64a1a ZJS |
1871 | [DNSSEC_DIGEST_SHA1] = "SHA-1", |
1872 | [DNSSEC_DIGEST_SHA256] = "SHA-256", | |
6f717d08 | 1873 | [DNSSEC_DIGEST_GOST_R_34_11_94] = "GOST_R_34.11-94", |
e3e64a1a | 1874 | [DNSSEC_DIGEST_SHA384] = "SHA-384", |
8730bccf | 1875 | }; |
8e54f5d9 | 1876 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_digest, int, 255); |