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74b2466e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
0dae31d4 ZJS |
22 | #include <math.h> |
23 | ||
b5efdb8a | 24 | #include "alloc-util.h" |
4ad7f276 | 25 | #include "dns-domain.h" |
7263f724 | 26 | #include "dns-type.h" |
e4e73a63 | 27 | #include "hexdecoct.h" |
07630cea | 28 | #include "resolved-dns-packet.h" |
e4e73a63 | 29 | #include "resolved-dns-rr.h" |
07630cea LP |
30 | #include "string-util.h" |
31 | #include "strv.h" | |
74b2466e | 32 | |
faa133f3 LP |
33 | DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) { |
34 | DnsResourceKey *k; | |
35 | size_t l; | |
74b2466e | 36 | |
faa133f3 LP |
37 | assert(name); |
38 | ||
39 | l = strlen(name); | |
40 | k = malloc0(sizeof(DnsResourceKey) + l + 1); | |
41 | if (!k) | |
42 | return NULL; | |
43 | ||
44 | k->n_ref = 1; | |
45 | k->class = class; | |
46 | k->type = type; | |
47 | ||
48 | strcpy((char*) k + sizeof(DnsResourceKey), name); | |
49 | ||
50 | return k; | |
51 | } | |
52 | ||
7c1ff6ac TG |
53 | DnsResourceKey* dns_resource_key_new_cname(const DnsResourceKey *key) { |
54 | assert(key); | |
55 | ||
56 | return dns_resource_key_new(key->class, DNS_TYPE_CNAME, DNS_RESOURCE_KEY_NAME(key)); | |
57 | } | |
58 | ||
36d9205d TG |
59 | DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname) { |
60 | assert(key); | |
61 | assert(cname); | |
62 | ||
63 | return dns_resource_key_new(key->class, key->type, cname->cname.name); | |
64 | } | |
65 | ||
faa133f3 LP |
66 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) { |
67 | DnsResourceKey *k; | |
68 | ||
69 | assert(name); | |
70 | ||
71 | k = new0(DnsResourceKey, 1); | |
72 | if (!k) | |
73 | return NULL; | |
74 | ||
75 | k->n_ref = 1; | |
76 | k->class = class; | |
77 | k->type = type; | |
78 | k->_name = name; | |
79 | ||
80 | return k; | |
81 | } | |
82 | ||
83 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) { | |
84 | ||
85 | if (!k) | |
86 | return NULL; | |
87 | ||
88 | assert(k->n_ref > 0); | |
89 | k->n_ref++; | |
90 | ||
91 | return k; | |
92 | } | |
93 | ||
94 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) { | |
95 | if (!k) | |
96 | return NULL; | |
97 | ||
98 | assert(k->n_ref > 0); | |
99 | ||
100 | if (k->n_ref == 1) { | |
101 | free(k->_name); | |
102 | free(k); | |
103 | } else | |
104 | k->n_ref--; | |
105 | ||
106 | return NULL; | |
107 | } | |
108 | ||
109 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) { | |
110 | int r; | |
111 | ||
112 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b)); | |
113 | if (r <= 0) | |
114 | return r; | |
115 | ||
116 | if (a->class != b->class) | |
117 | return 0; | |
118 | ||
119 | if (a->type != b->type) | |
120 | return 0; | |
121 | ||
122 | return 1; | |
123 | } | |
124 | ||
125 | int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr) { | |
126 | assert(key); | |
127 | assert(rr); | |
128 | ||
129 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) | |
130 | return 0; | |
131 | ||
132 | if (rr->key->type != key->type && key->type != DNS_TYPE_ANY) | |
133 | return 0; | |
134 | ||
135 | return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key)); | |
136 | } | |
137 | ||
138 | int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr) { | |
139 | assert(key); | |
140 | assert(rr); | |
141 | ||
142 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) | |
143 | return 0; | |
144 | ||
145 | if (rr->key->type != DNS_TYPE_CNAME) | |
146 | return 0; | |
147 | ||
148 | return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key)); | |
74b2466e LP |
149 | } |
150 | ||
b826ab58 | 151 | static void dns_resource_key_hash_func(const void *i, struct siphash *state) { |
322345fd | 152 | const DnsResourceKey *k = i; |
322345fd | 153 | |
b826ab58 | 154 | assert(k); |
322345fd | 155 | |
b826ab58 TG |
156 | dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), state); |
157 | siphash24_compress(&k->class, sizeof(k->class), state); | |
158 | siphash24_compress(&k->type, sizeof(k->type), state); | |
322345fd LP |
159 | } |
160 | ||
d5099efc | 161 | static int dns_resource_key_compare_func(const void *a, const void *b) { |
322345fd LP |
162 | const DnsResourceKey *x = a, *y = b; |
163 | int ret; | |
164 | ||
faa133f3 | 165 | ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y)); |
322345fd LP |
166 | if (ret != 0) |
167 | return ret; | |
168 | ||
169 | if (x->type < y->type) | |
170 | return -1; | |
171 | if (x->type > y->type) | |
172 | return 1; | |
173 | ||
174 | if (x->class < y->class) | |
175 | return -1; | |
176 | if (x->class > y->class) | |
177 | return 1; | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
d5099efc MS |
182 | const struct hash_ops dns_resource_key_hash_ops = { |
183 | .hash = dns_resource_key_hash_func, | |
184 | .compare = dns_resource_key_compare_func | |
185 | }; | |
186 | ||
2d4c5cbc | 187 | int dns_resource_key_to_string(const DnsResourceKey *key, char **ret) { |
d23a27a9 | 188 | char cbuf[strlen("CLASS") + DECIMAL_STR_MAX(uint16_t)], tbuf[strlen("TYPE") + DECIMAL_STR_MAX(uint16_t)]; |
2d4c5cbc LP |
189 | const char *c, *t; |
190 | char *s; | |
191 | ||
192 | c = dns_class_to_string(key->class); | |
193 | if (!c) { | |
d23a27a9 | 194 | sprintf(cbuf, "CLASS%u", key->class); |
2d4c5cbc LP |
195 | c = cbuf; |
196 | } | |
197 | ||
198 | t = dns_type_to_string(key->type); | |
199 | if (!t){ | |
d23a27a9 | 200 | sprintf(tbuf, "TYPE%u", key->type); |
2d4c5cbc LP |
201 | t = tbuf; |
202 | } | |
203 | ||
23432a1c | 204 | if (asprintf(&s, "%s %s %-5s", DNS_RESOURCE_KEY_NAME(key), c, t) < 0) |
2d4c5cbc LP |
205 | return -ENOMEM; |
206 | ||
207 | *ret = s; | |
208 | return 0; | |
209 | } | |
210 | ||
faa133f3 | 211 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { |
74b2466e LP |
212 | DnsResourceRecord *rr; |
213 | ||
214 | rr = new0(DnsResourceRecord, 1); | |
215 | if (!rr) | |
216 | return NULL; | |
217 | ||
218 | rr->n_ref = 1; | |
faa133f3 LP |
219 | rr->key = dns_resource_key_ref(key); |
220 | ||
74b2466e LP |
221 | return rr; |
222 | } | |
223 | ||
8bf52d3d LP |
224 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) { |
225 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
226 | ||
227 | key = dns_resource_key_new(class, type, name); | |
228 | if (!key) | |
229 | return NULL; | |
230 | ||
231 | return dns_resource_record_new(key); | |
232 | } | |
233 | ||
74b2466e LP |
234 | DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) { |
235 | if (!rr) | |
236 | return NULL; | |
237 | ||
238 | assert(rr->n_ref > 0); | |
239 | rr->n_ref++; | |
240 | ||
241 | return rr; | |
242 | } | |
243 | ||
244 | DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) { | |
245 | if (!rr) | |
246 | return NULL; | |
247 | ||
248 | assert(rr->n_ref > 0); | |
249 | ||
250 | if (rr->n_ref > 1) { | |
251 | rr->n_ref--; | |
252 | return NULL; | |
253 | } | |
254 | ||
faa133f3 | 255 | if (rr->key) { |
9de3e329 | 256 | switch(rr->key->type) { |
9c92ce6d LP |
257 | |
258 | case DNS_TYPE_SRV: | |
259 | free(rr->srv.name); | |
260 | break; | |
261 | ||
9de3e329 ZJS |
262 | case DNS_TYPE_PTR: |
263 | case DNS_TYPE_NS: | |
264 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 265 | case DNS_TYPE_DNAME: |
faa133f3 | 266 | free(rr->ptr.name); |
9de3e329 | 267 | break; |
9c92ce6d | 268 | |
9de3e329 | 269 | case DNS_TYPE_HINFO: |
faa133f3 LP |
270 | free(rr->hinfo.cpu); |
271 | free(rr->hinfo.os); | |
9de3e329 | 272 | break; |
9c92ce6d | 273 | |
9de3e329 | 274 | case DNS_TYPE_TXT: |
9c92ce6d | 275 | case DNS_TYPE_SPF: |
2001c805 | 276 | dns_txt_item_free_all(rr->txt.items); |
9de3e329 | 277 | break; |
9c92ce6d | 278 | |
9de3e329 | 279 | case DNS_TYPE_SOA: |
7e8e0422 LP |
280 | free(rr->soa.mname); |
281 | free(rr->soa.rname); | |
9de3e329 | 282 | break; |
9c92ce6d | 283 | |
9de3e329 | 284 | case DNS_TYPE_MX: |
946c7094 | 285 | free(rr->mx.exchange); |
9de3e329 | 286 | break; |
9c92ce6d | 287 | |
abf126a3 TG |
288 | case DNS_TYPE_DS: |
289 | free(rr->ds.digest); | |
290 | break; | |
291 | ||
42cc2eeb | 292 | case DNS_TYPE_SSHFP: |
549c1a25 | 293 | free(rr->sshfp.fingerprint); |
42cc2eeb LP |
294 | break; |
295 | ||
8db0d2f5 ZJS |
296 | case DNS_TYPE_DNSKEY: |
297 | free(rr->dnskey.key); | |
298 | break; | |
299 | ||
151226ab ZJS |
300 | case DNS_TYPE_RRSIG: |
301 | free(rr->rrsig.signer); | |
302 | free(rr->rrsig.signature); | |
303 | break; | |
304 | ||
50f1e641 TG |
305 | case DNS_TYPE_NSEC: |
306 | free(rr->nsec.next_domain_name); | |
307 | bitmap_free(rr->nsec.types); | |
308 | break; | |
309 | ||
5d45a880 TG |
310 | case DNS_TYPE_NSEC3: |
311 | free(rr->nsec3.next_hashed_name); | |
312 | free(rr->nsec3.salt); | |
313 | bitmap_free(rr->nsec3.types); | |
314 | break; | |
315 | ||
0dae31d4 | 316 | case DNS_TYPE_LOC: |
9de3e329 ZJS |
317 | case DNS_TYPE_A: |
318 | case DNS_TYPE_AAAA: | |
319 | break; | |
9c92ce6d | 320 | |
9de3e329 | 321 | default: |
faa133f3 | 322 | free(rr->generic.data); |
9de3e329 | 323 | } |
322345fd | 324 | |
faa133f3 LP |
325 | dns_resource_key_unref(rr->key); |
326 | } | |
322345fd | 327 | |
faa133f3 | 328 | free(rr); |
322345fd | 329 | |
322345fd LP |
330 | return NULL; |
331 | } | |
332 | ||
623a4c97 LP |
333 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) { |
334 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
335 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; | |
336 | _cleanup_free_ char *ptr = NULL; | |
337 | int r; | |
338 | ||
339 | assert(ret); | |
340 | assert(address); | |
341 | assert(hostname); | |
342 | ||
343 | r = dns_name_reverse(family, address, &ptr); | |
344 | if (r < 0) | |
345 | return r; | |
346 | ||
347 | key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr); | |
348 | if (!key) | |
349 | return -ENOMEM; | |
350 | ||
351 | ptr = NULL; | |
352 | ||
353 | rr = dns_resource_record_new(key); | |
354 | if (!rr) | |
355 | return -ENOMEM; | |
356 | ||
357 | rr->ptr.name = strdup(hostname); | |
358 | if (!rr->ptr.name) | |
359 | return -ENOMEM; | |
360 | ||
361 | *ret = rr; | |
362 | rr = NULL; | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
78c6a153 LP |
367 | int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name) { |
368 | DnsResourceRecord *rr; | |
369 | ||
370 | assert(ret); | |
371 | assert(address); | |
372 | assert(family); | |
373 | ||
374 | if (family == AF_INET) { | |
375 | ||
376 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, name); | |
377 | if (!rr) | |
378 | return -ENOMEM; | |
379 | ||
380 | rr->a.in_addr = address->in; | |
381 | ||
382 | } else if (family == AF_INET6) { | |
383 | ||
384 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, name); | |
385 | if (!rr) | |
386 | return -ENOMEM; | |
387 | ||
388 | rr->aaaa.in6_addr = address->in6; | |
389 | } else | |
390 | return -EAFNOSUPPORT; | |
391 | ||
392 | *ret = rr; | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
322345fd LP |
397 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { |
398 | int r; | |
399 | ||
400 | assert(a); | |
401 | assert(b); | |
402 | ||
faa133f3 | 403 | r = dns_resource_key_equal(a->key, b->key); |
322345fd LP |
404 | if (r <= 0) |
405 | return r; | |
406 | ||
fd0b4602 LP |
407 | if (a->unparseable != b->unparseable) |
408 | return 0; | |
409 | ||
410 | switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) { | |
2d4c5cbc | 411 | |
9c92ce6d LP |
412 | case DNS_TYPE_SRV: |
413 | r = dns_name_equal(a->srv.name, b->srv.name); | |
414 | if (r <= 0) | |
415 | return r; | |
416 | ||
417 | return a->srv.priority == b->srv.priority && | |
418 | a->srv.weight == b->srv.weight && | |
419 | a->srv.port == b->srv.port; | |
420 | ||
2d4c5cbc LP |
421 | case DNS_TYPE_PTR: |
422 | case DNS_TYPE_NS: | |
423 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 424 | case DNS_TYPE_DNAME: |
322345fd | 425 | return dns_name_equal(a->ptr.name, b->ptr.name); |
2d4c5cbc LP |
426 | |
427 | case DNS_TYPE_HINFO: | |
428 | return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && | |
429 | strcaseeq(a->hinfo.os, b->hinfo.os); | |
430 | ||
9de3e329 | 431 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
0f84a72e | 432 | case DNS_TYPE_TXT: |
2001c805 | 433 | return dns_txt_item_equal(a->txt.items, b->txt.items); |
2e276efc | 434 | |
2d4c5cbc | 435 | case DNS_TYPE_A: |
322345fd | 436 | return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; |
2d4c5cbc LP |
437 | |
438 | case DNS_TYPE_AAAA: | |
322345fd | 439 | return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; |
2d4c5cbc LP |
440 | |
441 | case DNS_TYPE_SOA: | |
7e8e0422 LP |
442 | r = dns_name_equal(a->soa.mname, b->soa.mname); |
443 | if (r <= 0) | |
444 | return r; | |
445 | r = dns_name_equal(a->soa.rname, b->soa.rname); | |
446 | if (r <= 0) | |
447 | return r; | |
448 | ||
449 | return a->soa.serial == b->soa.serial && | |
450 | a->soa.refresh == b->soa.refresh && | |
451 | a->soa.retry == b->soa.retry && | |
452 | a->soa.expire == b->soa.expire && | |
453 | a->soa.minimum == b->soa.minimum; | |
9c92ce6d | 454 | |
946c7094 ZJS |
455 | case DNS_TYPE_MX: |
456 | if (a->mx.priority != b->mx.priority) | |
457 | return 0; | |
458 | ||
459 | return dns_name_equal(a->mx.exchange, b->mx.exchange); | |
460 | ||
0dae31d4 ZJS |
461 | case DNS_TYPE_LOC: |
462 | assert(a->loc.version == b->loc.version); | |
463 | ||
464 | return a->loc.size == b->loc.size && | |
465 | a->loc.horiz_pre == b->loc.horiz_pre && | |
466 | a->loc.vert_pre == b->loc.vert_pre && | |
467 | a->loc.latitude == b->loc.latitude && | |
468 | a->loc.longitude == b->loc.longitude && | |
469 | a->loc.altitude == b->loc.altitude; | |
470 | ||
abf126a3 TG |
471 | case DNS_TYPE_DS: |
472 | return a->ds.key_tag == b->ds.key_tag && | |
473 | a->ds.algorithm == b->ds.algorithm && | |
474 | a->ds.digest_type == b->ds.digest_type && | |
475 | a->ds.digest_size == b->ds.digest_size && | |
476 | memcmp(a->ds.digest, b->ds.digest, a->ds.digest_size) == 0; | |
477 | ||
42cc2eeb LP |
478 | case DNS_TYPE_SSHFP: |
479 | return a->sshfp.algorithm == b->sshfp.algorithm && | |
480 | a->sshfp.fptype == b->sshfp.fptype && | |
549c1a25 TG |
481 | a->sshfp.fingerprint_size == b->sshfp.fingerprint_size && |
482 | memcmp(a->sshfp.fingerprint, b->sshfp.fingerprint, a->sshfp.fingerprint_size) == 0; | |
42cc2eeb | 483 | |
8db0d2f5 ZJS |
484 | case DNS_TYPE_DNSKEY: |
485 | return a->dnskey.zone_key_flag == b->dnskey.zone_key_flag && | |
486 | a->dnskey.sep_flag == b->dnskey.sep_flag && | |
487 | a->dnskey.algorithm == b->dnskey.algorithm && | |
488 | a->dnskey.key_size == b->dnskey.key_size && | |
489 | memcmp(a->dnskey.key, b->dnskey.key, a->dnskey.key_size) == 0; | |
490 | ||
151226ab ZJS |
491 | case DNS_TYPE_RRSIG: |
492 | /* do the fast comparisons first */ | |
03664a62 LN |
493 | if (a->rrsig.type_covered != b->rrsig.type_covered || |
494 | a->rrsig.algorithm != b->rrsig.algorithm || | |
495 | a->rrsig.labels != b->rrsig.labels || | |
496 | a->rrsig.original_ttl != b->rrsig.original_ttl || | |
497 | a->rrsig.expiration != b->rrsig.expiration || | |
498 | a->rrsig.inception != b->rrsig.inception || | |
499 | a->rrsig.key_tag != b->rrsig.key_tag || | |
151226ab ZJS |
500 | a->rrsig.signature_size != b->rrsig.signature_size || |
501 | memcmp(a->rrsig.signature, b->rrsig.signature, a->rrsig.signature_size) != 0) | |
502 | return false; | |
503 | ||
504 | return dns_name_equal(a->rrsig.signer, b->rrsig.signer); | |
505 | ||
50f1e641 TG |
506 | case DNS_TYPE_NSEC: |
507 | return dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name) && | |
508 | bitmap_equal(a->nsec.types, b->nsec.types); | |
509 | ||
5d45a880 TG |
510 | case DNS_TYPE_NSEC3: |
511 | return a->nsec3.algorithm == b->nsec3.algorithm && | |
512 | a->nsec3.flags == b->nsec3.flags && | |
513 | a->nsec3.iterations == b->nsec3.iterations && | |
514 | a->nsec3.salt_size == b->nsec3.salt_size && | |
515 | memcmp(a->nsec3.salt, b->nsec3.salt, a->nsec3.salt_size) == 0 && | |
516 | memcmp(a->nsec3.next_hashed_name, b->nsec3.next_hashed_name, a->nsec3.next_hashed_name_size) == 0 && | |
517 | bitmap_equal(a->nsec3.types, b->nsec3.types); | |
518 | ||
2d4c5cbc | 519 | default: |
322345fd LP |
520 | return a->generic.size == b->generic.size && |
521 | memcmp(a->generic.data, b->generic.data, a->generic.size) == 0; | |
2d4c5cbc | 522 | } |
322345fd LP |
523 | } |
524 | ||
0dae31d4 ZJS |
525 | static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude, |
526 | uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) { | |
527 | char *s; | |
528 | char NS = latitude >= 1U<<31 ? 'N' : 'S'; | |
529 | char EW = longitude >= 1U<<31 ? 'E' : 'W'; | |
530 | ||
531 | int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude); | |
532 | int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude); | |
533 | double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude); | |
534 | double siz = (size >> 4) * exp10((double) (size & 0xF)); | |
535 | double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF)); | |
536 | double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF)); | |
537 | ||
538 | if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm", | |
539 | (lat / 60000 / 60), | |
540 | (lat / 60000) % 60, | |
541 | (lat % 60000) / 1000., | |
542 | NS, | |
543 | (lon / 60000 / 60), | |
544 | (lon / 60000) % 60, | |
545 | (lon % 60000) / 1000., | |
546 | EW, | |
547 | alt / 100., | |
548 | siz / 100., | |
549 | hor / 100., | |
550 | ver / 100.) < 0) | |
551 | return NULL; | |
552 | ||
553 | return s; | |
554 | } | |
555 | ||
7c6423e1 TG |
556 | static int format_timestamp_dns(char *buf, size_t l, time_t sec) { |
557 | struct tm tm; | |
558 | ||
559 | assert(buf); | |
560 | assert(l > strlen("YYYYMMDDHHmmSS")); | |
561 | ||
562 | if (!gmtime_r(&sec, &tm)) | |
563 | return -EINVAL; | |
564 | ||
565 | if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0) | |
566 | return -EINVAL; | |
567 | ||
568 | return 0; | |
569 | } | |
570 | ||
50f1e641 TG |
571 | static char *format_types(Bitmap *types) { |
572 | _cleanup_strv_free_ char **strv = NULL; | |
573 | _cleanup_free_ char *str = NULL; | |
cb57dd41 | 574 | Iterator i; |
50f1e641 TG |
575 | unsigned type; |
576 | int r; | |
577 | ||
cb57dd41 | 578 | BITMAP_FOREACH(type, types, i) { |
50f1e641 | 579 | if (dns_type_to_string(type)) { |
2c1fb4f7 | 580 | r = strv_extend(&strv, dns_type_to_string(type)); |
50f1e641 TG |
581 | if (r < 0) |
582 | return NULL; | |
583 | } else { | |
584 | char *t; | |
585 | ||
586 | r = asprintf(&t, "TYPE%u", type); | |
587 | if (r < 0) | |
588 | return NULL; | |
589 | ||
2c1fb4f7 | 590 | r = strv_consume(&strv, t); |
50f1e641 TG |
591 | if (r < 0) |
592 | return NULL; | |
593 | } | |
594 | } | |
595 | ||
596 | str = strv_join(strv, " "); | |
597 | if (!str) | |
598 | return NULL; | |
599 | ||
600 | return strjoin("( ", str, " )", NULL); | |
601 | } | |
602 | ||
2001c805 LP |
603 | static char *format_txt(DnsTxtItem *first) { |
604 | DnsTxtItem *i; | |
605 | size_t c = 1; | |
606 | char *p, *s; | |
607 | ||
608 | LIST_FOREACH(items, i, first) | |
609 | c += i->length * 4 + 3; | |
610 | ||
611 | p = s = new(char, c); | |
612 | if (!s) | |
613 | return NULL; | |
614 | ||
615 | LIST_FOREACH(items, i, first) { | |
616 | size_t j; | |
617 | ||
618 | if (i != first) | |
619 | *(p++) = ' '; | |
620 | ||
621 | *(p++) = '"'; | |
622 | ||
623 | for (j = 0; j < i->length; j++) { | |
624 | if (i->data[j] < ' ' || i->data[j] == '"' || i->data[j] >= 127) { | |
625 | *(p++) = '\\'; | |
626 | *(p++) = '0' + (i->data[j] / 100); | |
627 | *(p++) = '0' + ((i->data[j] / 10) % 10); | |
628 | *(p++) = '0' + (i->data[j] % 10); | |
629 | } else | |
630 | *(p++) = i->data[j]; | |
631 | } | |
632 | ||
633 | *(p++) = '"'; | |
634 | } | |
635 | ||
636 | *p = 0; | |
637 | return s; | |
638 | } | |
639 | ||
2d4c5cbc | 640 | int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) { |
8db0d2f5 | 641 | _cleanup_free_ char *k = NULL, *t = NULL; |
2d4c5cbc LP |
642 | char *s; |
643 | int r; | |
322345fd | 644 | |
2d4c5cbc | 645 | assert(rr); |
322345fd | 646 | |
2d4c5cbc LP |
647 | r = dns_resource_key_to_string(rr->key, &k); |
648 | if (r < 0) | |
649 | return r; | |
322345fd | 650 | |
0dae31d4 | 651 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { |
322345fd | 652 | |
9c92ce6d LP |
653 | case DNS_TYPE_SRV: |
654 | r = asprintf(&s, "%s %u %u %u %s", | |
655 | k, | |
656 | rr->srv.priority, | |
657 | rr->srv.weight, | |
658 | rr->srv.port, | |
659 | strna(rr->srv.name)); | |
660 | if (r < 0) | |
661 | return -ENOMEM; | |
662 | break; | |
663 | ||
2d4c5cbc LP |
664 | case DNS_TYPE_PTR: |
665 | case DNS_TYPE_NS: | |
666 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 667 | case DNS_TYPE_DNAME: |
2d4c5cbc LP |
668 | s = strjoin(k, " ", rr->ptr.name, NULL); |
669 | if (!s) | |
670 | return -ENOMEM; | |
322345fd | 671 | |
2d4c5cbc | 672 | break; |
322345fd | 673 | |
2d4c5cbc LP |
674 | case DNS_TYPE_HINFO: |
675 | s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL); | |
676 | if (!s) | |
677 | return -ENOMEM; | |
678 | break; | |
322345fd | 679 | |
9de3e329 | 680 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
8db0d2f5 | 681 | case DNS_TYPE_TXT: |
2001c805 | 682 | t = format_txt(rr->txt.items); |
2e276efc ZJS |
683 | if (!t) |
684 | return -ENOMEM; | |
685 | ||
686 | s = strjoin(k, " ", t, NULL); | |
687 | if (!s) | |
688 | return -ENOMEM; | |
2e276efc | 689 | break; |
2e276efc | 690 | |
2d4c5cbc LP |
691 | case DNS_TYPE_A: { |
692 | _cleanup_free_ char *x = NULL; | |
322345fd | 693 | |
2d4c5cbc LP |
694 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x); |
695 | if (r < 0) | |
696 | return r; | |
322345fd | 697 | |
2d4c5cbc LP |
698 | s = strjoin(k, " ", x, NULL); |
699 | if (!s) | |
700 | return -ENOMEM; | |
701 | break; | |
702 | } | |
322345fd | 703 | |
8db0d2f5 ZJS |
704 | case DNS_TYPE_AAAA: |
705 | r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); | |
2d4c5cbc LP |
706 | if (r < 0) |
707 | return r; | |
322345fd | 708 | |
8db0d2f5 | 709 | s = strjoin(k, " ", t, NULL); |
2d4c5cbc LP |
710 | if (!s) |
711 | return -ENOMEM; | |
712 | break; | |
322345fd | 713 | |
2d4c5cbc LP |
714 | case DNS_TYPE_SOA: |
715 | r = asprintf(&s, "%s %s %s %u %u %u %u %u", | |
716 | k, | |
717 | strna(rr->soa.mname), | |
718 | strna(rr->soa.rname), | |
719 | rr->soa.serial, | |
720 | rr->soa.refresh, | |
721 | rr->soa.retry, | |
722 | rr->soa.expire, | |
723 | rr->soa.minimum); | |
724 | if (r < 0) | |
725 | return -ENOMEM; | |
726 | break; | |
727 | ||
946c7094 ZJS |
728 | case DNS_TYPE_MX: |
729 | r = asprintf(&s, "%s %u %s", | |
730 | k, | |
731 | rr->mx.priority, | |
732 | rr->mx.exchange); | |
733 | if (r < 0) | |
734 | return -ENOMEM; | |
735 | break; | |
736 | ||
8db0d2f5 | 737 | case DNS_TYPE_LOC: |
0dae31d4 ZJS |
738 | assert(rr->loc.version == 0); |
739 | ||
8db0d2f5 ZJS |
740 | t = format_location(rr->loc.latitude, |
741 | rr->loc.longitude, | |
742 | rr->loc.altitude, | |
743 | rr->loc.size, | |
744 | rr->loc.horiz_pre, | |
745 | rr->loc.vert_pre); | |
746 | if (!t) | |
0dae31d4 ZJS |
747 | return -ENOMEM; |
748 | ||
8db0d2f5 | 749 | s = strjoin(k, " ", t, NULL); |
0dae31d4 ZJS |
750 | if (!s) |
751 | return -ENOMEM; | |
0dae31d4 | 752 | break; |
0dae31d4 | 753 | |
abf126a3 TG |
754 | case DNS_TYPE_DS: |
755 | t = hexmem(rr->ds.digest, rr->ds.digest_size); | |
756 | if (!t) | |
757 | return -ENOMEM; | |
758 | ||
759 | r = asprintf(&s, "%s %u %u %u %s", | |
760 | k, | |
761 | rr->ds.key_tag, | |
762 | rr->ds.algorithm, | |
763 | rr->ds.digest_type, | |
764 | t); | |
765 | if (r < 0) | |
766 | return -ENOMEM; | |
767 | break; | |
768 | ||
8db0d2f5 | 769 | case DNS_TYPE_SSHFP: |
549c1a25 | 770 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); |
8db0d2f5 | 771 | if (!t) |
42cc2eeb LP |
772 | return -ENOMEM; |
773 | ||
774 | r = asprintf(&s, "%s %u %u %s", | |
775 | k, | |
776 | rr->sshfp.algorithm, | |
777 | rr->sshfp.fptype, | |
8db0d2f5 | 778 | t); |
42cc2eeb LP |
779 | if (r < 0) |
780 | return -ENOMEM; | |
781 | break; | |
42cc2eeb | 782 | |
ff3d6560 ZJS |
783 | case DNS_TYPE_DNSKEY: { |
784 | const char *alg; | |
785 | ||
786 | alg = dnssec_algorithm_to_string(rr->dnskey.algorithm); | |
787 | ||
1bf968f3 | 788 | t = base64mem(rr->dnskey.key, rr->dnskey.key_size); |
8db0d2f5 ZJS |
789 | if (!t) |
790 | return -ENOMEM; | |
2d4c5cbc | 791 | |
ff3d6560 | 792 | r = asprintf(&s, "%s %u 3 %.*s%.*u %s", |
8db0d2f5 ZJS |
793 | k, |
794 | dnskey_to_flags(rr), | |
ff3d6560 ZJS |
795 | alg ? -1 : 0, alg, |
796 | alg ? 0 : 1, alg ? 0u : (unsigned) rr->dnskey.algorithm, | |
8db0d2f5 ZJS |
797 | t); |
798 | if (r < 0) | |
2d4c5cbc | 799 | return -ENOMEM; |
8db0d2f5 | 800 | break; |
ff3d6560 | 801 | } |
2d4c5cbc | 802 | |
151226ab ZJS |
803 | case DNS_TYPE_RRSIG: { |
804 | const char *type, *alg; | |
7c6423e1 | 805 | char expiration[strlen("YYYYMMDDHHmmSS") + 1], inception[strlen("YYYYMMDDHHmmSS") + 1]; |
151226ab ZJS |
806 | |
807 | type = dns_type_to_string(rr->rrsig.type_covered); | |
808 | alg = dnssec_algorithm_to_string(rr->rrsig.algorithm); | |
809 | ||
1bf968f3 | 810 | t = base64mem(rr->rrsig.signature, rr->rrsig.signature_size); |
151226ab ZJS |
811 | if (!t) |
812 | return -ENOMEM; | |
813 | ||
7c6423e1 TG |
814 | r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration); |
815 | if (r < 0) | |
816 | return r; | |
817 | ||
818 | r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception); | |
819 | if (r < 0) | |
820 | return r; | |
821 | ||
151226ab ZJS |
822 | /* TYPE?? follows |
823 | * http://tools.ietf.org/html/rfc3597#section-5 */ | |
824 | ||
7c6423e1 | 825 | r = asprintf(&s, "%s %s%.*u %.*s%.*u %u %u %s %s %u %s %s", |
151226ab ZJS |
826 | k, |
827 | type ?: "TYPE", | |
828 | type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, | |
829 | alg ? -1 : 0, alg, | |
830 | alg ? 0 : 1, alg ? 0u : (unsigned) rr->rrsig.algorithm, | |
831 | rr->rrsig.labels, | |
832 | rr->rrsig.original_ttl, | |
7c6423e1 TG |
833 | expiration, |
834 | inception, | |
151226ab ZJS |
835 | rr->rrsig.key_tag, |
836 | rr->rrsig.signer, | |
837 | t); | |
838 | if (r < 0) | |
839 | return -ENOMEM; | |
840 | break; | |
841 | } | |
842 | ||
50f1e641 TG |
843 | case DNS_TYPE_NSEC: |
844 | t = format_types(rr->nsec.types); | |
845 | if (!t) | |
846 | return -ENOMEM; | |
847 | ||
848 | r = asprintf(&s, "%s %s %s", | |
849 | k, | |
850 | rr->nsec.next_domain_name, | |
851 | t); | |
852 | if (r < 0) | |
853 | return -ENOMEM; | |
854 | break; | |
855 | ||
5d45a880 TG |
856 | case DNS_TYPE_NSEC3: { |
857 | _cleanup_free_ char *salt = NULL, *hash = NULL; | |
858 | ||
f5430a3e | 859 | if (rr->nsec3.salt_size > 0) { |
5d45a880 TG |
860 | salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size); |
861 | if (!salt) | |
862 | return -ENOMEM; | |
863 | } | |
864 | ||
865 | hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false); | |
866 | if (!hash) | |
867 | return -ENOMEM; | |
868 | ||
869 | t = format_types(rr->nsec3.types); | |
870 | if (!t) | |
871 | return -ENOMEM; | |
872 | ||
873 | r = asprintf(&s, "%s %"PRIu8" %"PRIu8" %"PRIu16" %s %s %s", | |
874 | k, | |
875 | rr->nsec3.algorithm, | |
876 | rr->nsec3.flags, | |
877 | rr->nsec3.iterations, | |
f5430a3e | 878 | rr->nsec3.salt_size > 0 ? salt : "-", |
5d45a880 TG |
879 | hash, |
880 | t); | |
881 | if (r < 0) | |
882 | return -ENOMEM; | |
883 | ||
884 | break; | |
885 | } | |
886 | ||
8db0d2f5 ZJS |
887 | default: |
888 | t = hexmem(rr->generic.data, rr->generic.size); | |
889 | if (!t) | |
890 | return -ENOMEM; | |
891 | ||
f5430a3e | 892 | r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.size, t); |
d23a27a9 | 893 | if (r < 0) |
2d4c5cbc LP |
894 | return -ENOMEM; |
895 | break; | |
8db0d2f5 | 896 | } |
2d4c5cbc LP |
897 | |
898 | *ret = s; | |
899 | return 0; | |
900 | } | |
322345fd | 901 | |
2d4c5cbc | 902 | const char *dns_class_to_string(uint16_t class) { |
322345fd | 903 | |
2d4c5cbc | 904 | switch (class) { |
322345fd | 905 | |
2d4c5cbc LP |
906 | case DNS_CLASS_IN: |
907 | return "IN"; | |
322345fd | 908 | |
2d4c5cbc LP |
909 | case DNS_CLASS_ANY: |
910 | return "ANY"; | |
911 | } | |
322345fd | 912 | |
2d4c5cbc LP |
913 | return NULL; |
914 | } | |
322345fd | 915 | |
2d4c5cbc LP |
916 | int dns_class_from_string(const char *s, uint16_t *class) { |
917 | assert(s); | |
918 | assert(class); | |
919 | ||
920 | if (strcaseeq(s, "IN")) | |
921 | *class = DNS_CLASS_IN; | |
922 | else if (strcaseeq(s, "ANY")) | |
816b4547 | 923 | *class = DNS_CLASS_ANY; |
2d4c5cbc LP |
924 | else |
925 | return -EINVAL; | |
322345fd | 926 | |
2d4c5cbc LP |
927 | return 0; |
928 | } | |
2001c805 LP |
929 | |
930 | DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i) { | |
931 | DnsTxtItem *n; | |
932 | ||
933 | if (!i) | |
934 | return NULL; | |
935 | ||
936 | n = i->items_next; | |
937 | ||
938 | free(i); | |
939 | return dns_txt_item_free_all(n); | |
940 | } | |
941 | ||
942 | bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) { | |
943 | ||
944 | if (!a != !b) | |
945 | return false; | |
946 | ||
947 | if (!a) | |
948 | return true; | |
949 | ||
950 | if (a->length != b->length) | |
951 | return false; | |
952 | ||
953 | if (memcmp(a->data, b->data, a->length) != 0) | |
954 | return false; | |
955 | ||
956 | return dns_txt_item_equal(a->items_next, b->items_next); | |
957 | } |