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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 | ||
22 | #include <math.h> | |
23 | ||
24 | #include "alloc-util.h" | |
25 | #include "dns-domain.h" | |
26 | #include "dns-type.h" | |
27 | #include "hexdecoct.h" | |
28 | #include "resolved-dns-packet.h" | |
29 | #include "resolved-dns-rr.h" | |
30 | #include "string-util.h" | |
31 | #include "strv.h" | |
32 | ||
33 | DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) { | |
34 | DnsResourceKey *k; | |
35 | size_t l; | |
36 | ||
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 | ||
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 | ||
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 | ||
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)); | |
149 | } | |
150 | ||
151 | static void dns_resource_key_hash_func(const void *i, struct siphash *state) { | |
152 | const DnsResourceKey *k = i; | |
153 | ||
154 | assert(k); | |
155 | ||
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); | |
159 | } | |
160 | ||
161 | static int dns_resource_key_compare_func(const void *a, const void *b) { | |
162 | const DnsResourceKey *x = a, *y = b; | |
163 | int ret; | |
164 | ||
165 | ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y)); | |
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 | ||
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 | ||
187 | int dns_resource_key_to_string(const DnsResourceKey *key, char **ret) { | |
188 | char cbuf[strlen("CLASS") + DECIMAL_STR_MAX(uint16_t)], tbuf[strlen("TYPE") + DECIMAL_STR_MAX(uint16_t)]; | |
189 | const char *c, *t; | |
190 | char *s; | |
191 | ||
192 | c = dns_class_to_string(key->class); | |
193 | if (!c) { | |
194 | sprintf(cbuf, "CLASS%u", key->class); | |
195 | c = cbuf; | |
196 | } | |
197 | ||
198 | t = dns_type_to_string(key->type); | |
199 | if (!t){ | |
200 | sprintf(tbuf, "TYPE%u", key->type); | |
201 | t = tbuf; | |
202 | } | |
203 | ||
204 | if (asprintf(&s, "%s %s %-5s", DNS_RESOURCE_KEY_NAME(key), c, t) < 0) | |
205 | return -ENOMEM; | |
206 | ||
207 | *ret = s; | |
208 | return 0; | |
209 | } | |
210 | ||
211 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { | |
212 | DnsResourceRecord *rr; | |
213 | ||
214 | rr = new0(DnsResourceRecord, 1); | |
215 | if (!rr) | |
216 | return NULL; | |
217 | ||
218 | rr->n_ref = 1; | |
219 | rr->key = dns_resource_key_ref(key); | |
220 | ||
221 | return rr; | |
222 | } | |
223 | ||
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 | ||
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 | ||
255 | if (rr->key) { | |
256 | switch(rr->key->type) { | |
257 | ||
258 | case DNS_TYPE_SRV: | |
259 | free(rr->srv.name); | |
260 | break; | |
261 | ||
262 | case DNS_TYPE_PTR: | |
263 | case DNS_TYPE_NS: | |
264 | case DNS_TYPE_CNAME: | |
265 | case DNS_TYPE_DNAME: | |
266 | free(rr->ptr.name); | |
267 | break; | |
268 | ||
269 | case DNS_TYPE_HINFO: | |
270 | free(rr->hinfo.cpu); | |
271 | free(rr->hinfo.os); | |
272 | break; | |
273 | ||
274 | case DNS_TYPE_TXT: | |
275 | case DNS_TYPE_SPF: | |
276 | strv_free(rr->txt.strings); | |
277 | break; | |
278 | ||
279 | case DNS_TYPE_SOA: | |
280 | free(rr->soa.mname); | |
281 | free(rr->soa.rname); | |
282 | break; | |
283 | ||
284 | case DNS_TYPE_MX: | |
285 | free(rr->mx.exchange); | |
286 | break; | |
287 | ||
288 | case DNS_TYPE_DS: | |
289 | free(rr->ds.digest); | |
290 | break; | |
291 | ||
292 | case DNS_TYPE_SSHFP: | |
293 | free(rr->sshfp.fingerprint); | |
294 | break; | |
295 | ||
296 | case DNS_TYPE_DNSKEY: | |
297 | free(rr->dnskey.key); | |
298 | break; | |
299 | ||
300 | case DNS_TYPE_RRSIG: | |
301 | free(rr->rrsig.signer); | |
302 | free(rr->rrsig.signature); | |
303 | break; | |
304 | ||
305 | case DNS_TYPE_NSEC: | |
306 | free(rr->nsec.next_domain_name); | |
307 | bitmap_free(rr->nsec.types); | |
308 | break; | |
309 | ||
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 | ||
316 | case DNS_TYPE_LOC: | |
317 | case DNS_TYPE_A: | |
318 | case DNS_TYPE_AAAA: | |
319 | break; | |
320 | ||
321 | default: | |
322 | free(rr->generic.data); | |
323 | } | |
324 | ||
325 | dns_resource_key_unref(rr->key); | |
326 | } | |
327 | ||
328 | free(rr); | |
329 | ||
330 | return NULL; | |
331 | } | |
332 | ||
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 | ||
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 | ||
397 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { | |
398 | int r; | |
399 | ||
400 | assert(a); | |
401 | assert(b); | |
402 | ||
403 | r = dns_resource_key_equal(a->key, b->key); | |
404 | if (r <= 0) | |
405 | return r; | |
406 | ||
407 | if (a->unparseable != b->unparseable) | |
408 | return 0; | |
409 | ||
410 | switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) { | |
411 | ||
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 | ||
421 | case DNS_TYPE_PTR: | |
422 | case DNS_TYPE_NS: | |
423 | case DNS_TYPE_CNAME: | |
424 | case DNS_TYPE_DNAME: | |
425 | return dns_name_equal(a->ptr.name, b->ptr.name); | |
426 | ||
427 | case DNS_TYPE_HINFO: | |
428 | return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && | |
429 | strcaseeq(a->hinfo.os, b->hinfo.os); | |
430 | ||
431 | case DNS_TYPE_SPF: /* exactly the same as TXT */ | |
432 | case DNS_TYPE_TXT: | |
433 | return strv_equal(a->txt.strings, b->txt.strings); | |
434 | ||
435 | case DNS_TYPE_A: | |
436 | return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; | |
437 | ||
438 | case DNS_TYPE_AAAA: | |
439 | return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; | |
440 | ||
441 | case DNS_TYPE_SOA: | |
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; | |
454 | ||
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 | ||
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 | ||
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 | ||
478 | case DNS_TYPE_SSHFP: | |
479 | return a->sshfp.algorithm == b->sshfp.algorithm && | |
480 | a->sshfp.fptype == b->sshfp.fptype && | |
481 | a->sshfp.fingerprint_size == b->sshfp.fingerprint_size && | |
482 | memcmp(a->sshfp.fingerprint, b->sshfp.fingerprint, a->sshfp.fingerprint_size) == 0; | |
483 | ||
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 | ||
491 | case DNS_TYPE_RRSIG: | |
492 | /* do the fast comparisons first */ | |
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 || | |
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 | ||
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 | ||
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 | ||
519 | default: | |
520 | return a->generic.size == b->generic.size && | |
521 | memcmp(a->generic.data, b->generic.data, a->generic.size) == 0; | |
522 | } | |
523 | } | |
524 | ||
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 | ||
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 | ||
571 | static char *format_types(Bitmap *types) { | |
572 | _cleanup_strv_free_ char **strv = NULL; | |
573 | _cleanup_free_ char *str = NULL; | |
574 | Iterator i; | |
575 | unsigned type; | |
576 | int r; | |
577 | ||
578 | BITMAP_FOREACH(type, types, i) { | |
579 | if (dns_type_to_string(type)) { | |
580 | r = strv_extend(&strv, dns_type_to_string(type)); | |
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 | ||
590 | r = strv_consume(&strv, t); | |
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 | ||
603 | int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) { | |
604 | _cleanup_free_ char *k = NULL, *t = NULL; | |
605 | char *s; | |
606 | int r; | |
607 | ||
608 | assert(rr); | |
609 | ||
610 | r = dns_resource_key_to_string(rr->key, &k); | |
611 | if (r < 0) | |
612 | return r; | |
613 | ||
614 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { | |
615 | ||
616 | case DNS_TYPE_SRV: | |
617 | r = asprintf(&s, "%s %u %u %u %s", | |
618 | k, | |
619 | rr->srv.priority, | |
620 | rr->srv.weight, | |
621 | rr->srv.port, | |
622 | strna(rr->srv.name)); | |
623 | if (r < 0) | |
624 | return -ENOMEM; | |
625 | break; | |
626 | ||
627 | case DNS_TYPE_PTR: | |
628 | case DNS_TYPE_NS: | |
629 | case DNS_TYPE_CNAME: | |
630 | case DNS_TYPE_DNAME: | |
631 | s = strjoin(k, " ", rr->ptr.name, NULL); | |
632 | if (!s) | |
633 | return -ENOMEM; | |
634 | ||
635 | break; | |
636 | ||
637 | case DNS_TYPE_HINFO: | |
638 | s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL); | |
639 | if (!s) | |
640 | return -ENOMEM; | |
641 | break; | |
642 | ||
643 | case DNS_TYPE_SPF: /* exactly the same as TXT */ | |
644 | case DNS_TYPE_TXT: | |
645 | t = strv_join_quoted(rr->txt.strings); | |
646 | if (!t) | |
647 | return -ENOMEM; | |
648 | ||
649 | s = strjoin(k, " ", t, NULL); | |
650 | if (!s) | |
651 | return -ENOMEM; | |
652 | ||
653 | break; | |
654 | ||
655 | case DNS_TYPE_A: { | |
656 | _cleanup_free_ char *x = NULL; | |
657 | ||
658 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x); | |
659 | if (r < 0) | |
660 | return r; | |
661 | ||
662 | s = strjoin(k, " ", x, NULL); | |
663 | if (!s) | |
664 | return -ENOMEM; | |
665 | break; | |
666 | } | |
667 | ||
668 | case DNS_TYPE_AAAA: | |
669 | r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); | |
670 | if (r < 0) | |
671 | return r; | |
672 | ||
673 | s = strjoin(k, " ", t, NULL); | |
674 | if (!s) | |
675 | return -ENOMEM; | |
676 | break; | |
677 | ||
678 | case DNS_TYPE_SOA: | |
679 | r = asprintf(&s, "%s %s %s %u %u %u %u %u", | |
680 | k, | |
681 | strna(rr->soa.mname), | |
682 | strna(rr->soa.rname), | |
683 | rr->soa.serial, | |
684 | rr->soa.refresh, | |
685 | rr->soa.retry, | |
686 | rr->soa.expire, | |
687 | rr->soa.minimum); | |
688 | if (r < 0) | |
689 | return -ENOMEM; | |
690 | break; | |
691 | ||
692 | case DNS_TYPE_MX: | |
693 | r = asprintf(&s, "%s %u %s", | |
694 | k, | |
695 | rr->mx.priority, | |
696 | rr->mx.exchange); | |
697 | if (r < 0) | |
698 | return -ENOMEM; | |
699 | break; | |
700 | ||
701 | case DNS_TYPE_LOC: | |
702 | assert(rr->loc.version == 0); | |
703 | ||
704 | t = format_location(rr->loc.latitude, | |
705 | rr->loc.longitude, | |
706 | rr->loc.altitude, | |
707 | rr->loc.size, | |
708 | rr->loc.horiz_pre, | |
709 | rr->loc.vert_pre); | |
710 | if (!t) | |
711 | return -ENOMEM; | |
712 | ||
713 | s = strjoin(k, " ", t, NULL); | |
714 | if (!s) | |
715 | return -ENOMEM; | |
716 | break; | |
717 | ||
718 | case DNS_TYPE_DS: | |
719 | t = hexmem(rr->ds.digest, rr->ds.digest_size); | |
720 | if (!t) | |
721 | return -ENOMEM; | |
722 | ||
723 | r = asprintf(&s, "%s %u %u %u %s", | |
724 | k, | |
725 | rr->ds.key_tag, | |
726 | rr->ds.algorithm, | |
727 | rr->ds.digest_type, | |
728 | t); | |
729 | if (r < 0) | |
730 | return -ENOMEM; | |
731 | break; | |
732 | ||
733 | case DNS_TYPE_SSHFP: | |
734 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); | |
735 | if (!t) | |
736 | return -ENOMEM; | |
737 | ||
738 | r = asprintf(&s, "%s %u %u %s", | |
739 | k, | |
740 | rr->sshfp.algorithm, | |
741 | rr->sshfp.fptype, | |
742 | t); | |
743 | if (r < 0) | |
744 | return -ENOMEM; | |
745 | break; | |
746 | ||
747 | case DNS_TYPE_DNSKEY: { | |
748 | const char *alg; | |
749 | ||
750 | alg = dnssec_algorithm_to_string(rr->dnskey.algorithm); | |
751 | ||
752 | t = base64mem(rr->dnskey.key, rr->dnskey.key_size); | |
753 | if (!t) | |
754 | return -ENOMEM; | |
755 | ||
756 | r = asprintf(&s, "%s %u 3 %.*s%.*u %s", | |
757 | k, | |
758 | dnskey_to_flags(rr), | |
759 | alg ? -1 : 0, alg, | |
760 | alg ? 0 : 1, alg ? 0u : (unsigned) rr->dnskey.algorithm, | |
761 | t); | |
762 | if (r < 0) | |
763 | return -ENOMEM; | |
764 | break; | |
765 | } | |
766 | ||
767 | case DNS_TYPE_RRSIG: { | |
768 | const char *type, *alg; | |
769 | char expiration[strlen("YYYYMMDDHHmmSS") + 1], inception[strlen("YYYYMMDDHHmmSS") + 1]; | |
770 | ||
771 | type = dns_type_to_string(rr->rrsig.type_covered); | |
772 | alg = dnssec_algorithm_to_string(rr->rrsig.algorithm); | |
773 | ||
774 | t = base64mem(rr->rrsig.signature, rr->rrsig.signature_size); | |
775 | if (!t) | |
776 | return -ENOMEM; | |
777 | ||
778 | r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration); | |
779 | if (r < 0) | |
780 | return r; | |
781 | ||
782 | r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception); | |
783 | if (r < 0) | |
784 | return r; | |
785 | ||
786 | /* TYPE?? follows | |
787 | * http://tools.ietf.org/html/rfc3597#section-5 */ | |
788 | ||
789 | r = asprintf(&s, "%s %s%.*u %.*s%.*u %u %u %s %s %u %s %s", | |
790 | k, | |
791 | type ?: "TYPE", | |
792 | type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, | |
793 | alg ? -1 : 0, alg, | |
794 | alg ? 0 : 1, alg ? 0u : (unsigned) rr->rrsig.algorithm, | |
795 | rr->rrsig.labels, | |
796 | rr->rrsig.original_ttl, | |
797 | expiration, | |
798 | inception, | |
799 | rr->rrsig.key_tag, | |
800 | rr->rrsig.signer, | |
801 | t); | |
802 | if (r < 0) | |
803 | return -ENOMEM; | |
804 | break; | |
805 | } | |
806 | ||
807 | case DNS_TYPE_NSEC: | |
808 | t = format_types(rr->nsec.types); | |
809 | if (!t) | |
810 | return -ENOMEM; | |
811 | ||
812 | r = asprintf(&s, "%s %s %s", | |
813 | k, | |
814 | rr->nsec.next_domain_name, | |
815 | t); | |
816 | if (r < 0) | |
817 | return -ENOMEM; | |
818 | break; | |
819 | ||
820 | case DNS_TYPE_NSEC3: { | |
821 | _cleanup_free_ char *salt = NULL, *hash = NULL; | |
822 | ||
823 | if (rr->nsec3.salt_size > 0) { | |
824 | salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size); | |
825 | if (!salt) | |
826 | return -ENOMEM; | |
827 | } | |
828 | ||
829 | hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false); | |
830 | if (!hash) | |
831 | return -ENOMEM; | |
832 | ||
833 | t = format_types(rr->nsec3.types); | |
834 | if (!t) | |
835 | return -ENOMEM; | |
836 | ||
837 | r = asprintf(&s, "%s %"PRIu8" %"PRIu8" %"PRIu16" %s %s %s", | |
838 | k, | |
839 | rr->nsec3.algorithm, | |
840 | rr->nsec3.flags, | |
841 | rr->nsec3.iterations, | |
842 | rr->nsec3.salt_size > 0 ? salt : "-", | |
843 | hash, | |
844 | t); | |
845 | if (r < 0) | |
846 | return -ENOMEM; | |
847 | ||
848 | break; | |
849 | } | |
850 | ||
851 | default: | |
852 | t = hexmem(rr->generic.data, rr->generic.size); | |
853 | if (!t) | |
854 | return -ENOMEM; | |
855 | ||
856 | r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.size, t); | |
857 | if (r < 0) | |
858 | return -ENOMEM; | |
859 | break; | |
860 | } | |
861 | ||
862 | *ret = s; | |
863 | return 0; | |
864 | } | |
865 | ||
866 | const char *dns_class_to_string(uint16_t class) { | |
867 | ||
868 | switch (class) { | |
869 | ||
870 | case DNS_CLASS_IN: | |
871 | return "IN"; | |
872 | ||
873 | case DNS_CLASS_ANY: | |
874 | return "ANY"; | |
875 | } | |
876 | ||
877 | return NULL; | |
878 | } | |
879 | ||
880 | int dns_class_from_string(const char *s, uint16_t *class) { | |
881 | assert(s); | |
882 | assert(class); | |
883 | ||
884 | if (strcaseeq(s, "IN")) | |
885 | *class = DNS_CLASS_IN; | |
886 | else if (strcaseeq(s, "ANY")) | |
887 | *class = DNS_CLASS_ANY; | |
888 | else | |
889 | return -EINVAL; | |
890 | ||
891 | return 0; | |
892 | } |