1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2014 Lennart Poettering
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.
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.
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/>.
26 #include "resolved-dns-domain.h"
27 #include "resolved-dns-rr.h"
29 DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) {
36 k = malloc0(sizeof(DnsResourceKey) + l + 1);
44 strcpy((char*) k + sizeof(DnsResourceKey), name);
49 DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) {
54 k = new0(DnsResourceKey, 1);
66 DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) {
77 DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) {
92 int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) {
95 r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b));
99 if (a->class != b->class)
102 if (a->type != b->type)
108 int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr) {
112 if (rr->key->class != key->class && key->class != DNS_CLASS_ANY)
115 if (rr->key->type != key->type && key->type != DNS_TYPE_ANY)
118 return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key));
121 int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr) {
125 if (rr->key->class != key->class && key->class != DNS_CLASS_ANY)
128 if (rr->key->type != DNS_TYPE_CNAME)
131 return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key));
134 unsigned long dns_resource_key_hash_func(const void *i, const uint8_t hash_key[HASH_KEY_SIZE]) {
135 const DnsResourceKey *k = i;
138 ul = dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), hash_key);
139 ul = ul * hash_key[0] + ul + k->class;
140 ul = ul * hash_key[1] + ul + k->type;
145 int dns_resource_key_compare_func(const void *a, const void *b) {
146 const DnsResourceKey *x = a, *y = b;
149 ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y));
153 if (x->type < y->type)
155 if (x->type > y->type)
158 if (x->class < y->class)
160 if (x->class > y->class)
166 int dns_resource_key_to_string(const DnsResourceKey *key, char **ret) {
167 char cbuf[DECIMAL_STR_MAX(uint16_t)], tbuf[DECIMAL_STR_MAX(uint16_t)];
171 c = dns_class_to_string(key->class);
173 sprintf(cbuf, "%i", key->class);
177 t = dns_type_to_string(key->type);
179 sprintf(tbuf, "%i", key->type);
183 s = strjoin(DNS_RESOURCE_KEY_NAME(key), " ", c, " ", t, NULL);
191 DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) {
192 DnsResourceRecord *rr;
194 rr = new0(DnsResourceRecord, 1);
199 rr->key = dns_resource_key_ref(key);
204 DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) {
205 _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
207 key = dns_resource_key_new(class, type, name);
211 return dns_resource_record_new(key);
214 DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) {
218 assert(rr->n_ref > 0);
224 DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) {
228 assert(rr->n_ref > 0);
236 switch(rr->key->type) {
248 strv_free(rr->txt.strings);
255 free(rr->mx.exchange);
262 free(rr->generic.data);
265 dns_resource_key_unref(rr->key);
273 int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) {
274 _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
275 _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
276 _cleanup_free_ char *ptr = NULL;
283 r = dns_name_reverse(family, address, &ptr);
287 key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr);
293 rr = dns_resource_record_new(key);
297 rr->ptr.name = strdup(hostname);
307 int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) {
313 r = dns_resource_key_equal(a->key, b->key);
317 switch (a->key->type) {
322 return dns_name_equal(a->ptr.name, b->ptr.name);
325 return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) &&
326 strcaseeq(a->hinfo.os, b->hinfo.os);
328 case DNS_TYPE_SPF: /* exactly the same as TXT */
332 for (i = 0; a->txt.strings[i] || b->txt.strings[i]; i++)
333 if (!streq_ptr(a->txt.strings[i], b->txt.strings[i]))
339 return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0;
342 return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0;
345 r = dns_name_equal(a->soa.mname, b->soa.mname);
348 r = dns_name_equal(a->soa.rname, b->soa.rname);
352 return a->soa.serial == b->soa.serial &&
353 a->soa.refresh == b->soa.refresh &&
354 a->soa.retry == b->soa.retry &&
355 a->soa.expire == b->soa.expire &&
356 a->soa.minimum == b->soa.minimum;
358 if (a->mx.priority != b->mx.priority)
361 return dns_name_equal(a->mx.exchange, b->mx.exchange);
364 assert(a->loc.version == b->loc.version);
366 return a->loc.size == b->loc.size &&
367 a->loc.horiz_pre == b->loc.horiz_pre &&
368 a->loc.vert_pre == b->loc.vert_pre &&
369 a->loc.latitude == b->loc.latitude &&
370 a->loc.longitude == b->loc.longitude &&
371 a->loc.altitude == b->loc.altitude;
374 return a->generic.size == b->generic.size &&
375 memcmp(a->generic.data, b->generic.data, a->generic.size) == 0;
379 static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude,
380 uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) {
382 char NS = latitude >= 1U<<31 ? 'N' : 'S';
383 char EW = longitude >= 1U<<31 ? 'E' : 'W';
385 int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude);
386 int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude);
387 double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude);
388 double siz = (size >> 4) * exp10((double) (size & 0xF));
389 double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF));
390 double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF));
392 if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm",
395 (lat % 60000) / 1000.,
399 (lon % 60000) / 1000.,
411 int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) {
412 _cleanup_free_ char *k = NULL;
418 r = dns_resource_key_to_string(rr->key, &k);
422 switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) {
427 s = strjoin(k, " ", rr->ptr.name, NULL);
434 s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL);
439 case DNS_TYPE_SPF: /* exactly the same as TXT */
441 _cleanup_free_ char *t;
443 t = strv_join_quoted(rr->txt.strings);
447 s = strjoin(k, " ", t, NULL);
455 _cleanup_free_ char *x = NULL;
457 r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x);
461 s = strjoin(k, " ", x, NULL);
467 case DNS_TYPE_AAAA: {
468 _cleanup_free_ char *x = NULL;
470 r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &x);
474 s = strjoin(k, " ", x, NULL);
481 r = asprintf(&s, "%s %s %s %u %u %u %u %u",
483 strna(rr->soa.mname),
484 strna(rr->soa.rname),
495 r = asprintf(&s, "%s %u %s",
504 _cleanup_free_ char *loc;
505 assert(rr->loc.version == 0);
507 loc = format_location(rr->loc.latitude,
516 s = strjoin(k, " ", loc, NULL);
524 _cleanup_free_ char *x = NULL;
526 x = hexmem(rr->generic.data, rr->generic.size);
530 s = strjoin(k, " ", x, NULL);
540 const char *dns_class_to_string(uint16_t class) {
554 int dns_class_from_string(const char *s, uint16_t *class) {
558 if (strcaseeq(s, "IN"))
559 *class = DNS_CLASS_IN;
560 else if (strcaseeq(s, "ANY"))
561 *class = DNS_TYPE_ANY;
568 static const struct {
573 { DNS_TYPE_NS, "NS" },
574 { DNS_TYPE_CNAME, "CNAME" },
575 { DNS_TYPE_SOA, "SOA" },
576 { DNS_TYPE_PTR, "PTR" },
577 { DNS_TYPE_HINFO, "HINFO" },
578 { DNS_TYPE_MX, "MX" },
579 { DNS_TYPE_TXT, "TXT" },
580 { DNS_TYPE_AAAA, "AAAA" },
581 { DNS_TYPE_LOC, "LOC" },
582 { DNS_TYPE_SRV, "SRV" },
583 { DNS_TYPE_SSHFP, "SSHFP" },
584 { DNS_TYPE_SPF, "SPF" },
585 { DNS_TYPE_DNAME, "DNAME" },
586 { DNS_TYPE_ANY, "ANY" },
587 { DNS_TYPE_OPT, "OPT" },
588 { DNS_TYPE_TKEY, "TKEY" },
589 { DNS_TYPE_TSIG, "TSIG" },
590 { DNS_TYPE_IXFR, "IXFR" },
591 { DNS_TYPE_AXFR, "AXFR" },
595 const char *dns_type_to_string(uint16_t type) {
598 for (i = 0; i < ELEMENTSOF(dns_types); i++)
599 if (dns_types[i].type == type)
600 return dns_types[i].name;
605 int dns_type_from_string(const char *s, uint16_t *type) {
611 for (i = 0; i < ELEMENTSOF(dns_types); i++)
612 if (strcaseeq(dns_types[i].name, s)) {
613 *type = dns_types[i].type;