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 switch (a->key->type) {
336 r = dns_name_equal(a->srv.name, b->srv.name);
340 return a->srv.priority == b->srv.priority &&
341 a->srv.weight == b->srv.weight &&
342 a->srv.port == b->srv.port;
348 return dns_name_equal(a->ptr.name, b->ptr.name);
351 return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) &&
352 strcaseeq(a->hinfo.os, b->hinfo.os);
354 case DNS_TYPE_SPF: /* exactly the same as TXT */
358 for (i = 0; a->txt.strings[i] || b->txt.strings[i]; i++)
359 if (!streq_ptr(a->txt.strings[i], b->txt.strings[i]))
365 return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0;
368 return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0;
371 r = dns_name_equal(a->soa.mname, b->soa.mname);
374 r = dns_name_equal(a->soa.rname, b->soa.rname);
378 return a->soa.serial == b->soa.serial &&
379 a->soa.refresh == b->soa.refresh &&
380 a->soa.retry == b->soa.retry &&
381 a->soa.expire == b->soa.expire &&
382 a->soa.minimum == b->soa.minimum;
385 if (a->mx.priority != b->mx.priority)
388 return dns_name_equal(a->mx.exchange, b->mx.exchange);
391 assert(a->loc.version == b->loc.version);
393 return a->loc.size == b->loc.size &&
394 a->loc.horiz_pre == b->loc.horiz_pre &&
395 a->loc.vert_pre == b->loc.vert_pre &&
396 a->loc.latitude == b->loc.latitude &&
397 a->loc.longitude == b->loc.longitude &&
398 a->loc.altitude == b->loc.altitude;
401 return a->sshfp.algorithm == b->sshfp.algorithm &&
402 a->sshfp.fptype == b->sshfp.fptype &&
403 a->sshfp.key_size == b->sshfp.key_size &&
404 memcmp(a->sshfp.key, b->sshfp.key, a->sshfp.key_size) == 0;
407 return a->generic.size == b->generic.size &&
408 memcmp(a->generic.data, b->generic.data, a->generic.size) == 0;
412 static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude,
413 uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) {
415 char NS = latitude >= 1U<<31 ? 'N' : 'S';
416 char EW = longitude >= 1U<<31 ? 'E' : 'W';
418 int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude);
419 int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude);
420 double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude);
421 double siz = (size >> 4) * exp10((double) (size & 0xF));
422 double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF));
423 double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF));
425 if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm",
428 (lat % 60000) / 1000.,
432 (lon % 60000) / 1000.,
443 int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) {
444 _cleanup_free_ char *k = NULL;
450 r = dns_resource_key_to_string(rr->key, &k);
454 switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) {
457 r = asprintf(&s, "%s %u %u %u %s",
462 strna(rr->srv.name));
471 s = strjoin(k, " ", rr->ptr.name, NULL);
478 s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL);
483 case DNS_TYPE_SPF: /* exactly the same as TXT */
485 _cleanup_free_ char *t;
487 t = strv_join_quoted(rr->txt.strings);
491 s = strjoin(k, " ", t, NULL);
499 _cleanup_free_ char *x = NULL;
501 r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x);
505 s = strjoin(k, " ", x, NULL);
511 case DNS_TYPE_AAAA: {
512 _cleanup_free_ char *x = NULL;
514 r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &x);
518 s = strjoin(k, " ", x, NULL);
525 r = asprintf(&s, "%s %s %s %u %u %u %u %u",
527 strna(rr->soa.mname),
528 strna(rr->soa.rname),
539 r = asprintf(&s, "%s %u %s",
548 _cleanup_free_ char *loc;
549 assert(rr->loc.version == 0);
551 loc = format_location(rr->loc.latitude,
560 s = strjoin(k, " ", loc, NULL);
567 case DNS_TYPE_SSHFP: {
568 _cleanup_free_ char *x = NULL;
570 x = hexmem(rr->sshfp.key, rr->sshfp.key_size);
574 r = asprintf(&s, "%s %u %u %s",
585 _cleanup_free_ char *x = NULL;
587 x = hexmem(rr->generic.data, rr->generic.size);
591 s = strjoin(k, " ", x, NULL);
601 const char *dns_class_to_string(uint16_t class) {
615 int dns_class_from_string(const char *s, uint16_t *class) {
619 if (strcaseeq(s, "IN"))
620 *class = DNS_CLASS_IN;
621 else if (strcaseeq(s, "ANY"))
622 *class = DNS_TYPE_ANY;
629 static const struct {
634 { DNS_TYPE_NS, "NS" },
635 { DNS_TYPE_CNAME, "CNAME" },
636 { DNS_TYPE_SOA, "SOA" },
637 { DNS_TYPE_PTR, "PTR" },
638 { DNS_TYPE_HINFO, "HINFO" },
639 { DNS_TYPE_MX, "MX" },
640 { DNS_TYPE_TXT, "TXT" },
641 { DNS_TYPE_AAAA, "AAAA" },
642 { DNS_TYPE_LOC, "LOC" },
643 { DNS_TYPE_SRV, "SRV" },
644 { DNS_TYPE_SSHFP, "SSHFP" },
645 { DNS_TYPE_SPF, "SPF" },
646 { DNS_TYPE_DNAME, "DNAME" },
647 { DNS_TYPE_ANY, "ANY" },
648 { DNS_TYPE_OPT, "OPT" },
649 { DNS_TYPE_TKEY, "TKEY" },
650 { DNS_TYPE_TSIG, "TSIG" },
651 { DNS_TYPE_IXFR, "IXFR" },
652 { DNS_TYPE_AXFR, "AXFR" },
655 const char *dns_type_to_string(uint16_t type) {
658 for (i = 0; i < ELEMENTSOF(dns_types); i++)
659 if (dns_types[i].type == type)
660 return dns_types[i].name;
665 int dns_type_from_string(const char *s, uint16_t *type) {
671 for (i = 0; i < ELEMENTSOF(dns_types); i++)
672 if (strcaseeq(dns_types[i].name, s)) {
673 *type = dns_types[i].type;