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);
278 free(rr->generic.data);
281 dns_resource_key_unref(rr->key);
289 int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) {
290 _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
291 _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
292 _cleanup_free_ char *ptr = NULL;
299 r = dns_name_reverse(family, address, &ptr);
303 key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr);
309 rr = dns_resource_record_new(key);
313 rr->ptr.name = strdup(hostname);
323 int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) {
329 r = dns_resource_key_equal(a->key, b->key);
333 if (a->unparseable != b->unparseable)
336 switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) {
339 r = dns_name_equal(a->srv.name, b->srv.name);
343 return a->srv.priority == b->srv.priority &&
344 a->srv.weight == b->srv.weight &&
345 a->srv.port == b->srv.port;
351 return dns_name_equal(a->ptr.name, b->ptr.name);
354 return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) &&
355 strcaseeq(a->hinfo.os, b->hinfo.os);
357 case DNS_TYPE_SPF: /* exactly the same as TXT */
361 for (i = 0; a->txt.strings[i] || b->txt.strings[i]; i++)
362 if (!streq_ptr(a->txt.strings[i], b->txt.strings[i]))
368 return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0;
371 return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0;
374 r = dns_name_equal(a->soa.mname, b->soa.mname);
377 r = dns_name_equal(a->soa.rname, b->soa.rname);
381 return a->soa.serial == b->soa.serial &&
382 a->soa.refresh == b->soa.refresh &&
383 a->soa.retry == b->soa.retry &&
384 a->soa.expire == b->soa.expire &&
385 a->soa.minimum == b->soa.minimum;
388 if (a->mx.priority != b->mx.priority)
391 return dns_name_equal(a->mx.exchange, b->mx.exchange);
394 assert(a->loc.version == b->loc.version);
396 return a->loc.size == b->loc.size &&
397 a->loc.horiz_pre == b->loc.horiz_pre &&
398 a->loc.vert_pre == b->loc.vert_pre &&
399 a->loc.latitude == b->loc.latitude &&
400 a->loc.longitude == b->loc.longitude &&
401 a->loc.altitude == b->loc.altitude;
404 return a->sshfp.algorithm == b->sshfp.algorithm &&
405 a->sshfp.fptype == b->sshfp.fptype &&
406 a->sshfp.key_size == b->sshfp.key_size &&
407 memcmp(a->sshfp.key, b->sshfp.key, a->sshfp.key_size) == 0;
410 return a->generic.size == b->generic.size &&
411 memcmp(a->generic.data, b->generic.data, a->generic.size) == 0;
415 static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude,
416 uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) {
418 char NS = latitude >= 1U<<31 ? 'N' : 'S';
419 char EW = longitude >= 1U<<31 ? 'E' : 'W';
421 int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude);
422 int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude);
423 double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude);
424 double siz = (size >> 4) * exp10((double) (size & 0xF));
425 double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF));
426 double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF));
428 if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm",
431 (lat % 60000) / 1000.,
435 (lon % 60000) / 1000.,
446 int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) {
447 _cleanup_free_ char *k = NULL;
453 r = dns_resource_key_to_string(rr->key, &k);
457 switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) {
460 r = asprintf(&s, "%s %u %u %u %s",
465 strna(rr->srv.name));
474 s = strjoin(k, " ", rr->ptr.name, NULL);
481 s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL);
486 case DNS_TYPE_SPF: /* exactly the same as TXT */
488 _cleanup_free_ char *t;
490 t = strv_join_quoted(rr->txt.strings);
494 s = strjoin(k, " ", t, NULL);
502 _cleanup_free_ char *x = NULL;
504 r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x);
508 s = strjoin(k, " ", x, NULL);
514 case DNS_TYPE_AAAA: {
515 _cleanup_free_ char *x = NULL;
517 r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &x);
521 s = strjoin(k, " ", x, NULL);
528 r = asprintf(&s, "%s %s %s %u %u %u %u %u",
530 strna(rr->soa.mname),
531 strna(rr->soa.rname),
542 r = asprintf(&s, "%s %u %s",
551 _cleanup_free_ char *loc;
552 assert(rr->loc.version == 0);
554 loc = format_location(rr->loc.latitude,
563 s = strjoin(k, " ", loc, NULL);
570 case DNS_TYPE_SSHFP: {
571 _cleanup_free_ char *x = NULL;
573 x = hexmem(rr->sshfp.key, rr->sshfp.key_size);
577 r = asprintf(&s, "%s %u %u %s",
588 _cleanup_free_ char *x = NULL;
590 x = hexmem(rr->generic.data, rr->generic.size);
594 s = strjoin(k, " ", x, NULL);
604 const char *dns_class_to_string(uint16_t class) {
618 int dns_class_from_string(const char *s, uint16_t *class) {
622 if (strcaseeq(s, "IN"))
623 *class = DNS_CLASS_IN;
624 else if (strcaseeq(s, "ANY"))
625 *class = DNS_TYPE_ANY;
632 static const struct {
637 { DNS_TYPE_NS, "NS" },
638 { DNS_TYPE_CNAME, "CNAME" },
639 { DNS_TYPE_SOA, "SOA" },
640 { DNS_TYPE_PTR, "PTR" },
641 { DNS_TYPE_HINFO, "HINFO" },
642 { DNS_TYPE_MX, "MX" },
643 { DNS_TYPE_TXT, "TXT" },
644 { DNS_TYPE_AAAA, "AAAA" },
645 { DNS_TYPE_LOC, "LOC" },
646 { DNS_TYPE_SRV, "SRV" },
647 { DNS_TYPE_SSHFP, "SSHFP" },
648 { DNS_TYPE_SPF, "SPF" },
649 { DNS_TYPE_DNAME, "DNAME" },
650 { DNS_TYPE_ANY, "ANY" },
651 { DNS_TYPE_OPT, "OPT" },
652 { DNS_TYPE_TKEY, "TKEY" },
653 { DNS_TYPE_TSIG, "TSIG" },
654 { DNS_TYPE_IXFR, "IXFR" },
655 { DNS_TYPE_AXFR, "AXFR" },
658 const char *dns_type_to_string(uint16_t type) {
661 for (i = 0; i < ELEMENTSOF(dns_types); i++)
662 if (dns_types[i].type == type)
663 return dns_types[i].name;
668 int dns_type_from_string(const char *s, uint16_t *type) {
674 for (i = 0; i < ELEMENTSOF(dns_types); i++)
675 if (strcaseeq(dns_types[i].name, s)) {
676 *type = dns_types[i].type;