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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 "strv.h" | |
25 | ||
26 | #include "dns-domain.h" | |
27 | #include "resolved-dns-rr.h" | |
28 | #include "resolved-dns-packet.h" | |
29 | #include "dns-type.h" | |
30 | ||
31 | DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) { | |
32 | DnsResourceKey *k; | |
33 | size_t l; | |
34 | ||
35 | assert(name); | |
36 | ||
37 | l = strlen(name); | |
38 | k = malloc0(sizeof(DnsResourceKey) + l + 1); | |
39 | if (!k) | |
40 | return NULL; | |
41 | ||
42 | k->n_ref = 1; | |
43 | k->class = class; | |
44 | k->type = type; | |
45 | ||
46 | strcpy((char*) k + sizeof(DnsResourceKey), name); | |
47 | ||
48 | return k; | |
49 | } | |
50 | ||
51 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) { | |
52 | DnsResourceKey *k; | |
53 | ||
54 | assert(name); | |
55 | ||
56 | k = new0(DnsResourceKey, 1); | |
57 | if (!k) | |
58 | return NULL; | |
59 | ||
60 | k->n_ref = 1; | |
61 | k->class = class; | |
62 | k->type = type; | |
63 | k->_name = name; | |
64 | ||
65 | return k; | |
66 | } | |
67 | ||
68 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) { | |
69 | ||
70 | if (!k) | |
71 | return NULL; | |
72 | ||
73 | assert(k->n_ref > 0); | |
74 | k->n_ref++; | |
75 | ||
76 | return k; | |
77 | } | |
78 | ||
79 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) { | |
80 | if (!k) | |
81 | return NULL; | |
82 | ||
83 | assert(k->n_ref > 0); | |
84 | ||
85 | if (k->n_ref == 1) { | |
86 | free(k->_name); | |
87 | free(k); | |
88 | } else | |
89 | k->n_ref--; | |
90 | ||
91 | return NULL; | |
92 | } | |
93 | ||
94 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) { | |
95 | int r; | |
96 | ||
97 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b)); | |
98 | if (r <= 0) | |
99 | return r; | |
100 | ||
101 | if (a->class != b->class) | |
102 | return 0; | |
103 | ||
104 | if (a->type != b->type) | |
105 | return 0; | |
106 | ||
107 | return 1; | |
108 | } | |
109 | ||
110 | int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr) { | |
111 | assert(key); | |
112 | assert(rr); | |
113 | ||
114 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) | |
115 | return 0; | |
116 | ||
117 | if (rr->key->type != key->type && key->type != DNS_TYPE_ANY) | |
118 | return 0; | |
119 | ||
120 | return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key)); | |
121 | } | |
122 | ||
123 | int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr) { | |
124 | assert(key); | |
125 | assert(rr); | |
126 | ||
127 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) | |
128 | return 0; | |
129 | ||
130 | if (rr->key->type != DNS_TYPE_CNAME) | |
131 | return 0; | |
132 | ||
133 | return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key)); | |
134 | } | |
135 | ||
136 | static unsigned long dns_resource_key_hash_func(const void *i, const uint8_t hash_key[HASH_KEY_SIZE]) { | |
137 | const DnsResourceKey *k = i; | |
138 | unsigned long ul; | |
139 | ||
140 | ul = dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), hash_key); | |
141 | ul = ul * hash_key[0] + ul + k->class; | |
142 | ul = ul * hash_key[1] + ul + k->type; | |
143 | ||
144 | return ul; | |
145 | } | |
146 | ||
147 | static int dns_resource_key_compare_func(const void *a, const void *b) { | |
148 | const DnsResourceKey *x = a, *y = b; | |
149 | int ret; | |
150 | ||
151 | ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y)); | |
152 | if (ret != 0) | |
153 | return ret; | |
154 | ||
155 | if (x->type < y->type) | |
156 | return -1; | |
157 | if (x->type > y->type) | |
158 | return 1; | |
159 | ||
160 | if (x->class < y->class) | |
161 | return -1; | |
162 | if (x->class > y->class) | |
163 | return 1; | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | const struct hash_ops dns_resource_key_hash_ops = { | |
169 | .hash = dns_resource_key_hash_func, | |
170 | .compare = dns_resource_key_compare_func | |
171 | }; | |
172 | ||
173 | int dns_resource_key_to_string(const DnsResourceKey *key, char **ret) { | |
174 | char cbuf[DECIMAL_STR_MAX(uint16_t)], tbuf[DECIMAL_STR_MAX(uint16_t)]; | |
175 | const char *c, *t; | |
176 | char *s; | |
177 | ||
178 | c = dns_class_to_string(key->class); | |
179 | if (!c) { | |
180 | sprintf(cbuf, "%i", key->class); | |
181 | c = cbuf; | |
182 | } | |
183 | ||
184 | t = dns_type_to_string(key->type); | |
185 | if (!t){ | |
186 | sprintf(tbuf, "%i", key->type); | |
187 | t = tbuf; | |
188 | } | |
189 | ||
190 | if (asprintf(&s, "%s %s %-5s", DNS_RESOURCE_KEY_NAME(key), c, t) < 0) | |
191 | return -ENOMEM; | |
192 | ||
193 | *ret = s; | |
194 | return 0; | |
195 | } | |
196 | ||
197 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { | |
198 | DnsResourceRecord *rr; | |
199 | ||
200 | rr = new0(DnsResourceRecord, 1); | |
201 | if (!rr) | |
202 | return NULL; | |
203 | ||
204 | rr->n_ref = 1; | |
205 | rr->key = dns_resource_key_ref(key); | |
206 | ||
207 | return rr; | |
208 | } | |
209 | ||
210 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) { | |
211 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
212 | ||
213 | key = dns_resource_key_new(class, type, name); | |
214 | if (!key) | |
215 | return NULL; | |
216 | ||
217 | return dns_resource_record_new(key); | |
218 | } | |
219 | ||
220 | DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) { | |
221 | if (!rr) | |
222 | return NULL; | |
223 | ||
224 | assert(rr->n_ref > 0); | |
225 | rr->n_ref++; | |
226 | ||
227 | return rr; | |
228 | } | |
229 | ||
230 | DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) { | |
231 | if (!rr) | |
232 | return NULL; | |
233 | ||
234 | assert(rr->n_ref > 0); | |
235 | ||
236 | if (rr->n_ref > 1) { | |
237 | rr->n_ref--; | |
238 | return NULL; | |
239 | } | |
240 | ||
241 | if (rr->key) { | |
242 | switch(rr->key->type) { | |
243 | ||
244 | case DNS_TYPE_SRV: | |
245 | free(rr->srv.name); | |
246 | break; | |
247 | ||
248 | case DNS_TYPE_PTR: | |
249 | case DNS_TYPE_NS: | |
250 | case DNS_TYPE_CNAME: | |
251 | case DNS_TYPE_DNAME: | |
252 | free(rr->ptr.name); | |
253 | break; | |
254 | ||
255 | case DNS_TYPE_HINFO: | |
256 | free(rr->hinfo.cpu); | |
257 | free(rr->hinfo.os); | |
258 | break; | |
259 | ||
260 | case DNS_TYPE_TXT: | |
261 | case DNS_TYPE_SPF: | |
262 | strv_free(rr->txt.strings); | |
263 | break; | |
264 | ||
265 | case DNS_TYPE_SOA: | |
266 | free(rr->soa.mname); | |
267 | free(rr->soa.rname); | |
268 | break; | |
269 | ||
270 | case DNS_TYPE_MX: | |
271 | free(rr->mx.exchange); | |
272 | break; | |
273 | ||
274 | case DNS_TYPE_SSHFP: | |
275 | free(rr->sshfp.key); | |
276 | break; | |
277 | ||
278 | case DNS_TYPE_DNSKEY: | |
279 | free(rr->dnskey.key); | |
280 | break; | |
281 | ||
282 | case DNS_TYPE_RRSIG: | |
283 | free(rr->rrsig.signer); | |
284 | free(rr->rrsig.signature); | |
285 | break; | |
286 | ||
287 | case DNS_TYPE_LOC: | |
288 | case DNS_TYPE_A: | |
289 | case DNS_TYPE_AAAA: | |
290 | break; | |
291 | ||
292 | default: | |
293 | free(rr->generic.data); | |
294 | } | |
295 | ||
296 | dns_resource_key_unref(rr->key); | |
297 | } | |
298 | ||
299 | free(rr); | |
300 | ||
301 | return NULL; | |
302 | } | |
303 | ||
304 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) { | |
305 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
306 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; | |
307 | _cleanup_free_ char *ptr = NULL; | |
308 | int r; | |
309 | ||
310 | assert(ret); | |
311 | assert(address); | |
312 | assert(hostname); | |
313 | ||
314 | r = dns_name_reverse(family, address, &ptr); | |
315 | if (r < 0) | |
316 | return r; | |
317 | ||
318 | key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr); | |
319 | if (!key) | |
320 | return -ENOMEM; | |
321 | ||
322 | ptr = NULL; | |
323 | ||
324 | rr = dns_resource_record_new(key); | |
325 | if (!rr) | |
326 | return -ENOMEM; | |
327 | ||
328 | rr->ptr.name = strdup(hostname); | |
329 | if (!rr->ptr.name) | |
330 | return -ENOMEM; | |
331 | ||
332 | *ret = rr; | |
333 | rr = NULL; | |
334 | ||
335 | return 0; | |
336 | } | |
337 | ||
338 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { | |
339 | int r; | |
340 | ||
341 | assert(a); | |
342 | assert(b); | |
343 | ||
344 | r = dns_resource_key_equal(a->key, b->key); | |
345 | if (r <= 0) | |
346 | return r; | |
347 | ||
348 | if (a->unparseable != b->unparseable) | |
349 | return 0; | |
350 | ||
351 | switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) { | |
352 | ||
353 | case DNS_TYPE_SRV: | |
354 | r = dns_name_equal(a->srv.name, b->srv.name); | |
355 | if (r <= 0) | |
356 | return r; | |
357 | ||
358 | return a->srv.priority == b->srv.priority && | |
359 | a->srv.weight == b->srv.weight && | |
360 | a->srv.port == b->srv.port; | |
361 | ||
362 | case DNS_TYPE_PTR: | |
363 | case DNS_TYPE_NS: | |
364 | case DNS_TYPE_CNAME: | |
365 | case DNS_TYPE_DNAME: | |
366 | return dns_name_equal(a->ptr.name, b->ptr.name); | |
367 | ||
368 | case DNS_TYPE_HINFO: | |
369 | return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && | |
370 | strcaseeq(a->hinfo.os, b->hinfo.os); | |
371 | ||
372 | case DNS_TYPE_SPF: /* exactly the same as TXT */ | |
373 | case DNS_TYPE_TXT: | |
374 | return strv_equal(a->txt.strings, b->txt.strings); | |
375 | ||
376 | case DNS_TYPE_A: | |
377 | return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; | |
378 | ||
379 | case DNS_TYPE_AAAA: | |
380 | return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; | |
381 | ||
382 | case DNS_TYPE_SOA: | |
383 | r = dns_name_equal(a->soa.mname, b->soa.mname); | |
384 | if (r <= 0) | |
385 | return r; | |
386 | r = dns_name_equal(a->soa.rname, b->soa.rname); | |
387 | if (r <= 0) | |
388 | return r; | |
389 | ||
390 | return a->soa.serial == b->soa.serial && | |
391 | a->soa.refresh == b->soa.refresh && | |
392 | a->soa.retry == b->soa.retry && | |
393 | a->soa.expire == b->soa.expire && | |
394 | a->soa.minimum == b->soa.minimum; | |
395 | ||
396 | case DNS_TYPE_MX: | |
397 | if (a->mx.priority != b->mx.priority) | |
398 | return 0; | |
399 | ||
400 | return dns_name_equal(a->mx.exchange, b->mx.exchange); | |
401 | ||
402 | case DNS_TYPE_LOC: | |
403 | assert(a->loc.version == b->loc.version); | |
404 | ||
405 | return a->loc.size == b->loc.size && | |
406 | a->loc.horiz_pre == b->loc.horiz_pre && | |
407 | a->loc.vert_pre == b->loc.vert_pre && | |
408 | a->loc.latitude == b->loc.latitude && | |
409 | a->loc.longitude == b->loc.longitude && | |
410 | a->loc.altitude == b->loc.altitude; | |
411 | ||
412 | case DNS_TYPE_SSHFP: | |
413 | return a->sshfp.algorithm == b->sshfp.algorithm && | |
414 | a->sshfp.fptype == b->sshfp.fptype && | |
415 | a->sshfp.key_size == b->sshfp.key_size && | |
416 | memcmp(a->sshfp.key, b->sshfp.key, a->sshfp.key_size) == 0; | |
417 | ||
418 | case DNS_TYPE_DNSKEY: | |
419 | return a->dnskey.zone_key_flag == b->dnskey.zone_key_flag && | |
420 | a->dnskey.sep_flag == b->dnskey.sep_flag && | |
421 | a->dnskey.algorithm == b->dnskey.algorithm && | |
422 | a->dnskey.key_size == b->dnskey.key_size && | |
423 | memcmp(a->dnskey.key, b->dnskey.key, a->dnskey.key_size) == 0; | |
424 | ||
425 | case DNS_TYPE_RRSIG: | |
426 | /* do the fast comparisons first */ | |
427 | if (a->rrsig.type_covered != b->rrsig.type_covered || | |
428 | a->rrsig.algorithm != b->rrsig.algorithm || | |
429 | a->rrsig.labels != b->rrsig.labels || | |
430 | a->rrsig.original_ttl != b->rrsig.original_ttl || | |
431 | a->rrsig.expiration != b->rrsig.expiration || | |
432 | a->rrsig.inception != b->rrsig.inception || | |
433 | a->rrsig.key_tag != b->rrsig.key_tag || | |
434 | a->rrsig.signature_size != b->rrsig.signature_size || | |
435 | memcmp(a->rrsig.signature, b->rrsig.signature, a->rrsig.signature_size) != 0) | |
436 | return false; | |
437 | ||
438 | return dns_name_equal(a->rrsig.signer, b->rrsig.signer); | |
439 | ||
440 | default: | |
441 | return a->generic.size == b->generic.size && | |
442 | memcmp(a->generic.data, b->generic.data, a->generic.size) == 0; | |
443 | } | |
444 | } | |
445 | ||
446 | static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude, | |
447 | uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) { | |
448 | char *s; | |
449 | char NS = latitude >= 1U<<31 ? 'N' : 'S'; | |
450 | char EW = longitude >= 1U<<31 ? 'E' : 'W'; | |
451 | ||
452 | int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude); | |
453 | int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude); | |
454 | double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude); | |
455 | double siz = (size >> 4) * exp10((double) (size & 0xF)); | |
456 | double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF)); | |
457 | double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF)); | |
458 | ||
459 | if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm", | |
460 | (lat / 60000 / 60), | |
461 | (lat / 60000) % 60, | |
462 | (lat % 60000) / 1000., | |
463 | NS, | |
464 | (lon / 60000 / 60), | |
465 | (lon / 60000) % 60, | |
466 | (lon % 60000) / 1000., | |
467 | EW, | |
468 | alt / 100., | |
469 | siz / 100., | |
470 | hor / 100., | |
471 | ver / 100.) < 0) | |
472 | return NULL; | |
473 | ||
474 | return s; | |
475 | } | |
476 | ||
477 | static int format_timestamp_dns(char *buf, size_t l, time_t sec) { | |
478 | struct tm tm; | |
479 | ||
480 | assert(buf); | |
481 | assert(l > strlen("YYYYMMDDHHmmSS")); | |
482 | ||
483 | if (!gmtime_r(&sec, &tm)) | |
484 | return -EINVAL; | |
485 | ||
486 | if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0) | |
487 | return -EINVAL; | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
492 | int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) { | |
493 | _cleanup_free_ char *k = NULL, *t = NULL; | |
494 | char *s; | |
495 | int r; | |
496 | ||
497 | assert(rr); | |
498 | ||
499 | r = dns_resource_key_to_string(rr->key, &k); | |
500 | if (r < 0) | |
501 | return r; | |
502 | ||
503 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { | |
504 | ||
505 | case DNS_TYPE_SRV: | |
506 | r = asprintf(&s, "%s %u %u %u %s", | |
507 | k, | |
508 | rr->srv.priority, | |
509 | rr->srv.weight, | |
510 | rr->srv.port, | |
511 | strna(rr->srv.name)); | |
512 | if (r < 0) | |
513 | return -ENOMEM; | |
514 | break; | |
515 | ||
516 | case DNS_TYPE_PTR: | |
517 | case DNS_TYPE_NS: | |
518 | case DNS_TYPE_CNAME: | |
519 | case DNS_TYPE_DNAME: | |
520 | s = strjoin(k, " ", rr->ptr.name, NULL); | |
521 | if (!s) | |
522 | return -ENOMEM; | |
523 | ||
524 | break; | |
525 | ||
526 | case DNS_TYPE_HINFO: | |
527 | s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL); | |
528 | if (!s) | |
529 | return -ENOMEM; | |
530 | break; | |
531 | ||
532 | case DNS_TYPE_SPF: /* exactly the same as TXT */ | |
533 | case DNS_TYPE_TXT: | |
534 | t = strv_join_quoted(rr->txt.strings); | |
535 | if (!t) | |
536 | return -ENOMEM; | |
537 | ||
538 | s = strjoin(k, " ", t, NULL); | |
539 | if (!s) | |
540 | return -ENOMEM; | |
541 | ||
542 | break; | |
543 | ||
544 | case DNS_TYPE_A: { | |
545 | _cleanup_free_ char *x = NULL; | |
546 | ||
547 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x); | |
548 | if (r < 0) | |
549 | return r; | |
550 | ||
551 | s = strjoin(k, " ", x, NULL); | |
552 | if (!s) | |
553 | return -ENOMEM; | |
554 | break; | |
555 | } | |
556 | ||
557 | case DNS_TYPE_AAAA: | |
558 | r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); | |
559 | if (r < 0) | |
560 | return r; | |
561 | ||
562 | s = strjoin(k, " ", t, NULL); | |
563 | if (!s) | |
564 | return -ENOMEM; | |
565 | break; | |
566 | ||
567 | case DNS_TYPE_SOA: | |
568 | r = asprintf(&s, "%s %s %s %u %u %u %u %u", | |
569 | k, | |
570 | strna(rr->soa.mname), | |
571 | strna(rr->soa.rname), | |
572 | rr->soa.serial, | |
573 | rr->soa.refresh, | |
574 | rr->soa.retry, | |
575 | rr->soa.expire, | |
576 | rr->soa.minimum); | |
577 | if (r < 0) | |
578 | return -ENOMEM; | |
579 | break; | |
580 | ||
581 | case DNS_TYPE_MX: | |
582 | r = asprintf(&s, "%s %u %s", | |
583 | k, | |
584 | rr->mx.priority, | |
585 | rr->mx.exchange); | |
586 | if (r < 0) | |
587 | return -ENOMEM; | |
588 | break; | |
589 | ||
590 | case DNS_TYPE_LOC: | |
591 | assert(rr->loc.version == 0); | |
592 | ||
593 | t = format_location(rr->loc.latitude, | |
594 | rr->loc.longitude, | |
595 | rr->loc.altitude, | |
596 | rr->loc.size, | |
597 | rr->loc.horiz_pre, | |
598 | rr->loc.vert_pre); | |
599 | if (!t) | |
600 | return -ENOMEM; | |
601 | ||
602 | s = strjoin(k, " ", t, NULL); | |
603 | if (!s) | |
604 | return -ENOMEM; | |
605 | break; | |
606 | ||
607 | case DNS_TYPE_SSHFP: | |
608 | t = hexmem(rr->sshfp.key, rr->sshfp.key_size); | |
609 | if (!t) | |
610 | return -ENOMEM; | |
611 | ||
612 | r = asprintf(&s, "%s %u %u %s", | |
613 | k, | |
614 | rr->sshfp.algorithm, | |
615 | rr->sshfp.fptype, | |
616 | t); | |
617 | if (r < 0) | |
618 | return -ENOMEM; | |
619 | break; | |
620 | ||
621 | case DNS_TYPE_DNSKEY: { | |
622 | const char *alg; | |
623 | ||
624 | alg = dnssec_algorithm_to_string(rr->dnskey.algorithm); | |
625 | ||
626 | t = base64mem(rr->dnskey.key, rr->dnskey.key_size); | |
627 | if (!t) | |
628 | return -ENOMEM; | |
629 | ||
630 | r = asprintf(&s, "%s %u 3 %.*s%.*u %s", | |
631 | k, | |
632 | dnskey_to_flags(rr), | |
633 | alg ? -1 : 0, alg, | |
634 | alg ? 0 : 1, alg ? 0u : (unsigned) rr->dnskey.algorithm, | |
635 | t); | |
636 | if (r < 0) | |
637 | return -ENOMEM; | |
638 | break; | |
639 | } | |
640 | ||
641 | case DNS_TYPE_RRSIG: { | |
642 | const char *type, *alg; | |
643 | char expiration[strlen("YYYYMMDDHHmmSS") + 1], inception[strlen("YYYYMMDDHHmmSS") + 1]; | |
644 | ||
645 | type = dns_type_to_string(rr->rrsig.type_covered); | |
646 | alg = dnssec_algorithm_to_string(rr->rrsig.algorithm); | |
647 | ||
648 | t = base64mem(rr->rrsig.signature, rr->rrsig.signature_size); | |
649 | if (!t) | |
650 | return -ENOMEM; | |
651 | ||
652 | r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration); | |
653 | if (r < 0) | |
654 | return r; | |
655 | ||
656 | r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception); | |
657 | if (r < 0) | |
658 | return r; | |
659 | ||
660 | /* TYPE?? follows | |
661 | * http://tools.ietf.org/html/rfc3597#section-5 */ | |
662 | ||
663 | r = asprintf(&s, "%s %s%.*u %.*s%.*u %u %u %s %s %u %s %s", | |
664 | k, | |
665 | type ?: "TYPE", | |
666 | type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, | |
667 | alg ? -1 : 0, alg, | |
668 | alg ? 0 : 1, alg ? 0u : (unsigned) rr->rrsig.algorithm, | |
669 | rr->rrsig.labels, | |
670 | rr->rrsig.original_ttl, | |
671 | expiration, | |
672 | inception, | |
673 | rr->rrsig.key_tag, | |
674 | rr->rrsig.signer, | |
675 | t); | |
676 | if (r < 0) | |
677 | return -ENOMEM; | |
678 | break; | |
679 | } | |
680 | ||
681 | default: | |
682 | t = hexmem(rr->generic.data, rr->generic.size); | |
683 | if (!t) | |
684 | return -ENOMEM; | |
685 | ||
686 | s = strjoin(k, " ", t, NULL); | |
687 | if (!s) | |
688 | return -ENOMEM; | |
689 | break; | |
690 | } | |
691 | ||
692 | *ret = s; | |
693 | return 0; | |
694 | } | |
695 | ||
696 | const char *dns_class_to_string(uint16_t class) { | |
697 | ||
698 | switch (class) { | |
699 | ||
700 | case DNS_CLASS_IN: | |
701 | return "IN"; | |
702 | ||
703 | case DNS_CLASS_ANY: | |
704 | return "ANY"; | |
705 | } | |
706 | ||
707 | return NULL; | |
708 | } | |
709 | ||
710 | int dns_class_from_string(const char *s, uint16_t *class) { | |
711 | assert(s); | |
712 | assert(class); | |
713 | ||
714 | if (strcaseeq(s, "IN")) | |
715 | *class = DNS_CLASS_IN; | |
716 | else if (strcaseeq(s, "ANY")) | |
717 | *class = DNS_TYPE_ANY; | |
718 | else | |
719 | return -EINVAL; | |
720 | ||
721 | return 0; | |
722 | } |