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) {
256 strv_free(rr->txt.strings);
265 free(rr->mx.exchange);
274 free(rr->generic.data);
277 dns_resource_key_unref(rr->key);
285 int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) {
286 _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
287 _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
288 _cleanup_free_ char *ptr = NULL;
295 r = dns_name_reverse(family, address, &ptr);
299 key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr);
305 rr = dns_resource_record_new(key);
309 rr->ptr.name = strdup(hostname);
319 int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) {
325 r = dns_resource_key_equal(a->key, b->key);
329 switch (a->key->type) {
332 r = dns_name_equal(a->srv.name, b->srv.name);
336 return a->srv.priority == b->srv.priority &&
337 a->srv.weight == b->srv.weight &&
338 a->srv.port == b->srv.port;
344 return dns_name_equal(a->ptr.name, b->ptr.name);
347 return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) &&
348 strcaseeq(a->hinfo.os, b->hinfo.os);
350 case DNS_TYPE_SPF: /* exactly the same as TXT */
354 for (i = 0; a->txt.strings[i] || b->txt.strings[i]; i++)
355 if (!streq_ptr(a->txt.strings[i], b->txt.strings[i]))
361 return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0;
364 return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0;
367 r = dns_name_equal(a->soa.mname, b->soa.mname);
370 r = dns_name_equal(a->soa.rname, b->soa.rname);
374 return a->soa.serial == b->soa.serial &&
375 a->soa.refresh == b->soa.refresh &&
376 a->soa.retry == b->soa.retry &&
377 a->soa.expire == b->soa.expire &&
378 a->soa.minimum == b->soa.minimum;
381 if (a->mx.priority != b->mx.priority)
384 return dns_name_equal(a->mx.exchange, b->mx.exchange);
387 assert(a->loc.version == b->loc.version);
389 return a->loc.size == b->loc.size &&
390 a->loc.horiz_pre == b->loc.horiz_pre &&
391 a->loc.vert_pre == b->loc.vert_pre &&
392 a->loc.latitude == b->loc.latitude &&
393 a->loc.longitude == b->loc.longitude &&
394 a->loc.altitude == b->loc.altitude;
397 return a->generic.size == b->generic.size &&
398 memcmp(a->generic.data, b->generic.data, a->generic.size) == 0;
402 static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude,
403 uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) {
405 char NS = latitude >= 1U<<31 ? 'N' : 'S';
406 char EW = longitude >= 1U<<31 ? 'E' : 'W';
408 int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude);
409 int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude);
410 double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude);
411 double siz = (size >> 4) * exp10((double) (size & 0xF));
412 double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF));
413 double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF));
415 if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm",
418 (lat % 60000) / 1000.,
422 (lon % 60000) / 1000.,
434 int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) {
435 _cleanup_free_ char *k = NULL;
441 r = dns_resource_key_to_string(rr->key, &k);
445 switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) {
448 r = asprintf(&s, "%s %u %u %u %s",
453 strna(rr->srv.name));
462 s = strjoin(k, " ", rr->ptr.name, NULL);
469 s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL);
474 case DNS_TYPE_SPF: /* exactly the same as TXT */
476 _cleanup_free_ char *t;
478 t = strv_join_quoted(rr->txt.strings);
482 s = strjoin(k, " ", t, NULL);
490 _cleanup_free_ char *x = NULL;
492 r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x);
496 s = strjoin(k, " ", x, NULL);
502 case DNS_TYPE_AAAA: {
503 _cleanup_free_ char *x = NULL;
505 r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &x);
509 s = strjoin(k, " ", x, NULL);
516 r = asprintf(&s, "%s %s %s %u %u %u %u %u",
518 strna(rr->soa.mname),
519 strna(rr->soa.rname),
530 r = asprintf(&s, "%s %u %s",
539 _cleanup_free_ char *loc;
540 assert(rr->loc.version == 0);
542 loc = format_location(rr->loc.latitude,
551 s = strjoin(k, " ", loc, NULL);
559 _cleanup_free_ char *x = NULL;
561 x = hexmem(rr->generic.data, rr->generic.size);
565 s = strjoin(k, " ", x, NULL);
575 const char *dns_class_to_string(uint16_t class) {
589 int dns_class_from_string(const char *s, uint16_t *class) {
593 if (strcaseeq(s, "IN"))
594 *class = DNS_CLASS_IN;
595 else if (strcaseeq(s, "ANY"))
596 *class = DNS_TYPE_ANY;
603 static const struct {
608 { DNS_TYPE_NS, "NS" },
609 { DNS_TYPE_CNAME, "CNAME" },
610 { DNS_TYPE_SOA, "SOA" },
611 { DNS_TYPE_PTR, "PTR" },
612 { DNS_TYPE_HINFO, "HINFO" },
613 { DNS_TYPE_MX, "MX" },
614 { DNS_TYPE_TXT, "TXT" },
615 { DNS_TYPE_AAAA, "AAAA" },
616 { DNS_TYPE_LOC, "LOC" },
617 { DNS_TYPE_SRV, "SRV" },
618 { DNS_TYPE_SSHFP, "SSHFP" },
619 { DNS_TYPE_SPF, "SPF" },
620 { DNS_TYPE_DNAME, "DNAME" },
621 { DNS_TYPE_ANY, "ANY" },
622 { DNS_TYPE_OPT, "OPT" },
623 { DNS_TYPE_TKEY, "TKEY" },
624 { DNS_TYPE_TSIG, "TSIG" },
625 { DNS_TYPE_IXFR, "IXFR" },
626 { DNS_TYPE_AXFR, "AXFR" },
629 const char *dns_type_to_string(uint16_t type) {
632 for (i = 0; i < ELEMENTSOF(dns_types); i++)
633 if (dns_types[i].type == type)
634 return dns_types[i].name;
639 int dns_type_from_string(const char *s, uint16_t *type) {
645 for (i = 0; i < ELEMENTSOF(dns_types); i++)
646 if (strcaseeq(dns_types[i].name, s)) {
647 *type = dns_types[i].type;