3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering#include <math.h>

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering#include "alloc-util.h"

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek#include "dns-domain.h"

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek#include "dns-type.h"

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek#include "hexdecoct.h"

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering#include "resolved-dns-packet.h"

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering#include "resolved-dns-rr.h"

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering#include "string-table.h"

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering#include "string-util.h"

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering#include "strv.h"

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart PoetteringDnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering DnsResourceKey *k;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering size_t l;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering assert(name);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering l = strlen(name);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering k = malloc0(sizeof(DnsResourceKey) + l + 1);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (!k)

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return NULL;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering k->n_ref = 1;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering k->class = class;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering k->type = type;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering strcpy((char*) k + sizeof(DnsResourceKey), name);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return k;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering}

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-SzmekDnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering int r;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering assert(key);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering assert(cname);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering assert(IN_SET(cname->key->type, DNS_TYPE_CNAME, DNS_TYPE_DNAME));

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (cname->key->type == DNS_TYPE_CNAME)

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return dns_resource_key_new(key->class, key->type, cname->cname.name);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering else {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering DnsResourceKey *k;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering char *destination = NULL;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

39883f622f392d8579f4428fc5a789a102efbb10Lennart Poettering r = dns_name_change_suffix(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(cname->key), cname->dname.name, &destination);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (r < 0)

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return NULL;

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek if (r == 0)

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek return dns_resource_key_ref((DnsResourceKey*) key);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering k = dns_resource_key_new_consume(key->class, key->type, destination);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (!k) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering free(destination);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return NULL;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering }

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return k;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering }

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering}

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poetteringint dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering DnsResourceKey *new_key;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering char *joined;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering int r;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering assert(ret);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering assert(key);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering assert(name);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (dns_name_is_root(name)) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering *ret = dns_resource_key_ref(key);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return 0;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering }

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), name, &joined);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (r < 0)

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return r;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering new_key = dns_resource_key_new_consume(key->class, key->type, joined);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (!new_key) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering free(joined);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return -ENOMEM;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering }

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering *ret = new_key;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return 0;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering}

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart PoetteringDnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering DnsResourceKey *k;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering assert(name);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering k = new0(DnsResourceKey, 1);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (!k)

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return NULL;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering k->n_ref = 1;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering k->class = class;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering k->type = type;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering k->_name = name;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return k;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering}

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart PoetteringDnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (!k)

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return NULL;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering /* Static/const keys created with DNS_RESOURCE_KEY_CONST will

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering assert(k->n_ref != (unsigned) -1);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering assert(k->n_ref > 0);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering k->n_ref++;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return k;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering}

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart PoetteringDnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (!k)

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return NULL;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering assert(k->n_ref != (unsigned) -1);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering assert(k->n_ref > 0);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (k->n_ref == 1) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering free(k->_name);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering free(k);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering } else

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering k->n_ref--;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return NULL;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering}

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poetteringbool dns_resource_key_is_address(const DnsResourceKey *key) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering assert(key);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering /* Check if this is an A or AAAA resource key */

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return key->class == DNS_CLASS_IN && IN_SET(key->type, DNS_TYPE_A, DNS_TYPE_AAAA);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering}

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poetteringint dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering int r;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (a == b)

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return 1;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b));

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (r <= 0)

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return r;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (a->class != b->class)

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return 0;

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek if (a->type != b->type)

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek return 0;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return 1;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering}

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poetteringint dns_resource_key_match_rr(const DnsResourceKey *key, DnsResourceRecord *rr, const char *search_domain) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering int r;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering assert(key);

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek assert(rr);

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek if (key == rr->key)

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return 1;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering /* Checks if an rr matches the specified key. If a search

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (rr->key->class != key->class && key->class != DNS_CLASS_ANY)

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler return 0;

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett if (rr->key->type != key->type && key->type != DNS_TYPE_ANY)

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler return 0;

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett r = dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key));

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett if (r != 0)

c7fdf44d08e1217d40dc092fb90a65978a0f541fLennart Poettering return r;

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett if (search_domain) {

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett _cleanup_free_ char *joined = NULL;

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), search_domain, &joined);

c7fdf44d08e1217d40dc092fb90a65978a0f541fLennart Poettering if (r < 0)

c7fdf44d08e1217d40dc092fb90a65978a0f541fLennart Poettering return r;

c7fdf44d08e1217d40dc092fb90a65978a0f541fLennart Poettering

c7fdf44d08e1217d40dc092fb90a65978a0f541fLennart Poettering return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), joined);

c7fdf44d08e1217d40dc092fb90a65978a0f541fLennart Poettering }

c7fdf44d08e1217d40dc092fb90a65978a0f541fLennart Poettering

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler return 0;

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett}

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächlerint dns_resource_key_match_cname_or_dname(const DnsResourceKey *key, const DnsResourceKey *cname, const char *search_domain) {

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler int r;

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler assert(key);

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler assert(cname);

4cd2b2cf8ca585d15ebc859701b346658262b5bbDenis Tikhomirov

4cd2b2cf8ca585d15ebc859701b346658262b5bbDenis Tikhomirov if (cname->class != key->class && key->class != DNS_CLASS_ANY)

4cd2b2cf8ca585d15ebc859701b346658262b5bbDenis Tikhomirov return 0;

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler if (cname->type == DNS_TYPE_CNAME)

0c9d8f1d4b5018199cb5a9b57580dc1480a7f915Jani Nikula r = dns_name_equal(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(cname));

4cd2b2cf8ca585d15ebc859701b346658262b5bbDenis Tikhomirov else if (cname->type == DNS_TYPE_DNAME)

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler r = dns_name_endswith(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(cname));

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler else

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett return 0;

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett if (r != 0)

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett return r;

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett

4cd2b2cf8ca585d15ebc859701b346658262b5bbDenis Tikhomirov if (search_domain) {

4cd2b2cf8ca585d15ebc859701b346658262b5bbDenis Tikhomirov _cleanup_free_ char *joined = NULL;

4cd2b2cf8ca585d15ebc859701b346658262b5bbDenis Tikhomirov

4cd2b2cf8ca585d15ebc859701b346658262b5bbDenis Tikhomirov r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), search_domain, &joined);

4cd2b2cf8ca585d15ebc859701b346658262b5bbDenis Tikhomirov if (r < 0)

4cd2b2cf8ca585d15ebc859701b346658262b5bbDenis Tikhomirov return r;

0c9d8f1d4b5018199cb5a9b57580dc1480a7f915Jani Nikula

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett if (cname->type == DNS_TYPE_CNAME)

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett return dns_name_equal(joined, DNS_RESOURCE_KEY_NAME(cname));

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett else if (cname->type == DNS_TYPE_DNAME)

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett return dns_name_endswith(joined, DNS_RESOURCE_KEY_NAME(cname));

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett }

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett return 0;

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett}

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett

0c9d8f1d4b5018199cb5a9b57580dc1480a7f915Jani Nikulaint dns_resource_key_match_soa(const DnsResourceKey *key, const DnsResourceKey *soa) {

0c9d8f1d4b5018199cb5a9b57580dc1480a7f915Jani Nikula assert(soa);

0c9d8f1d4b5018199cb5a9b57580dc1480a7f915Jani Nikula assert(key);

0c9d8f1d4b5018199cb5a9b57580dc1480a7f915Jani Nikula

0c9d8f1d4b5018199cb5a9b57580dc1480a7f915Jani Nikula /* Checks whether 'soa' is a SOA record for the specified key. */

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett if (soa->class != key->class)

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett return 0;

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering if (soa->type != DNS_TYPE_SOA)

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek return 0;

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering return dns_name_endswith(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(soa));

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering}

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poetteringstatic void dns_resource_key_hash_func(const void *i, struct siphash *state) {

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering const DnsResourceKey *k = i;

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering assert(k);

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), state);

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering siphash24_compress(&k->class, sizeof(k->class), state);

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering siphash24_compress(&k->type, sizeof(k->type), state);

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering}

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poetteringstatic int dns_resource_key_compare_func(const void *a, const void *b) {

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering const DnsResourceKey *x = a, *y = b;

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering int ret;

ef5bfcf668e6029faa78534dfeb2591df854cdefLennart Poettering

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y));

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek if (ret != 0)

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek return ret;

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering if (x->type < y->type)

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering return -1;

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering if (x->type > y->type)

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering return 1;

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek if (x->class < y->class)

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering return -1;

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering if (x->class > y->class)

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return 1;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek return 0;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering}

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poetteringconst struct hash_ops dns_resource_key_hash_ops = {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering .hash = dns_resource_key_hash_func,

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering .compare = dns_resource_key_compare_func

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering};

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poetteringint dns_resource_key_to_string(const DnsResourceKey *key, char **ret) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering char cbuf[strlen("CLASS") + DECIMAL_STR_MAX(uint16_t)], tbuf[strlen("TYPE") + DECIMAL_STR_MAX(uint16_t)];

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering const char *c, *t, *n;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering char *s;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering /* If we cannot convert the CLASS/TYPE into a known string,

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering c = dns_class_to_string(key->class);

875c6e1b48f37a07dfbb80d6653c73f205e94260Lennart Poettering if (!c) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering sprintf(cbuf, "CLASS%u", key->class);

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering c = cbuf;

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek }

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek t = dns_type_to_string(key->type);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (!t){

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering sprintf(tbuf, "TYPE%u", key->type);

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek t = tbuf;

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering }

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler n = DNS_RESOURCE_KEY_NAME(key);

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler if (asprintf(&s, "%s%s %s %-5s", n, endswith(n, ".") ? "" : ".", c, t) < 0)

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler return -ENOMEM;

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler *ret = s;

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler return 0;

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler}

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler

be3f52f4ed02a9256b1577719677b32a17b525acLennart PoetteringDnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) {

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering DnsResourceRecord *rr;

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering rr = new0(DnsResourceRecord, 1);

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering if (!rr)

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering return NULL;

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering rr->n_ref = 1;

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering rr->key = dns_resource_key_ref(key);

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering rr->expiry = USEC_INFINITY;

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering return rr;

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering}

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering

be3f52f4ed02a9256b1577719677b32a17b525acLennart PoetteringDnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) {

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering key = dns_resource_key_new(class, type, name);

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering if (!key)

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering return NULL;

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering return dns_resource_record_new(key);

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering}

be3f52f4ed02a9256b1577719677b32a17b525acLennart Poettering

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart PoetteringDnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) {

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek if (!rr)

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek return NULL;

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering assert(rr->n_ref > 0);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering rr->n_ref++;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return rr;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering}

73e231abde39f22097df50542c745e01de879836Jan Engelhardt

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart PoetteringDnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering if (!rr)

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return NULL;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

74df0fca09b3c31ed19e14ba80f996fdff772417Lennart Poettering assert(rr->n_ref > 0);

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering if (rr->n_ref > 1) {

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering rr->n_ref--;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering return NULL;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering }

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering if (rr->key) {

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering switch(rr->key->type) {

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek case DNS_TYPE_SRV:

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering free(rr->srv.name);

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering break;

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering case DNS_TYPE_PTR:

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering case DNS_TYPE_NS:

3cadce7d33e263ec7a6a83c00c11144930258b22Thomas Bächler case DNS_TYPE_CNAME:

7b909d7407965c03caaba30daae7aee113627a83Josh Triplett case DNS_TYPE_DNAME:

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering free(rr->ptr.name);

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering break;

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek case DNS_TYPE_HINFO:

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek free(rr->hinfo.cpu);

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering free(rr->hinfo.os);

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering break;

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering case DNS_TYPE_TXT:

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering case DNS_TYPE_SPF:

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering dns_txt_item_free_all(rr->txt.items);

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering break;

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering case DNS_TYPE_SOA:

0f4ba83c397e807939a4eb0b2cbd04ad4ab548ccLennart Poettering free(rr->soa.mname);

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering free(rr->soa.rname);

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering break;

938d2699d2e818bd996614e89ea3d668200ad2a8Zbigniew Jędrzejewski-Szmek

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek case DNS_TYPE_MX:

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering free(rr->mx.exchange);

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering break;

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering case DNS_TYPE_DS:

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering free(rr->ds.digest);

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek break;

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering case DNS_TYPE_SSHFP:

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering free(rr->sshfp.fingerprint);

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering break;

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering case DNS_TYPE_DNSKEY:

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering free(rr->dnskey.key);

1ca208fb4f93e5869704af1812cbff7130a2fc03Zbigniew Jędrzejewski-Szmek break;

3731acf1acfb4a6eb68374a5b137f3b368f63381Lennart Poettering

case DNS_TYPE_RRSIG:

free(rr->rrsig.signer);

free(rr->rrsig.signature);

break;

case DNS_TYPE_NSEC:

free(rr->nsec.next_domain_name);

bitmap_free(rr->nsec.types);

break;

case DNS_TYPE_NSEC3:

free(rr->nsec3.next_hashed_name);

free(rr->nsec3.salt);

bitmap_free(rr->nsec3.types);

break;

case DNS_TYPE_LOC:

case DNS_TYPE_A:

case DNS_TYPE_AAAA:

break;

default:

free(rr->generic.data);

}

free(rr->wire_format);

dns_resource_key_unref(rr->key);

}

free(rr->to_string);

free(rr);

return NULL;

}

int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) {

_cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;

_cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;

_cleanup_free_ char *ptr = NULL;

int r;

assert(ret);

assert(address);

assert(hostname);

r = dns_name_reverse(family, address, &ptr);

if (r < 0)

return r;

key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr);

if (!key)

return -ENOMEM;

ptr = NULL;

rr = dns_resource_record_new(key);

if (!rr)

return -ENOMEM;

rr->ptr.name = strdup(hostname);

if (!rr->ptr.name)

return -ENOMEM;

*ret = rr;

rr = NULL;

return 0;

}

int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name) {

DnsResourceRecord *rr;

assert(ret);

assert(address);

assert(family);

if (family == AF_INET) {

rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, name);

if (!rr)

return -ENOMEM;

rr->a.in_addr = address->in;

} else if (family == AF_INET6) {

rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, name);

if (!rr)

return -ENOMEM;

rr->aaaa.in6_addr = address->in6;

} else

return -EAFNOSUPPORT;

*ret = rr;

return 0;

}

int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) {

int r;

assert(a);

assert(b);

if (a == b)

return 1;

r = dns_resource_key_equal(a->key, b->key);

if (r <= 0)

return r;

if (a->unparseable != b->unparseable)

return 0;

switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) {

case DNS_TYPE_SRV:

r = dns_name_equal(a->srv.name, b->srv.name);

if (r <= 0)

return r;

return a->srv.priority == b->srv.priority &&

a->srv.weight == b->srv.weight &&

a->srv.port == b->srv.port;

case DNS_TYPE_PTR:

case DNS_TYPE_NS:

case DNS_TYPE_CNAME:

case DNS_TYPE_DNAME:

return dns_name_equal(a->ptr.name, b->ptr.name);

case DNS_TYPE_HINFO:

return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) &&

strcaseeq(a->hinfo.os, b->hinfo.os);

case DNS_TYPE_SPF: /* exactly the same as TXT */

case DNS_TYPE_TXT:

return dns_txt_item_equal(a->txt.items, b->txt.items);

case DNS_TYPE_A:

return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0;

case DNS_TYPE_AAAA:

return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0;

case DNS_TYPE_SOA:

r = dns_name_equal(a->soa.mname, b->soa.mname);

if (r <= 0)

return r;

r = dns_name_equal(a->soa.rname, b->soa.rname);

if (r <= 0)

return r;

return a->soa.serial == b->soa.serial &&

a->soa.refresh == b->soa.refresh &&

a->soa.retry == b->soa.retry &&

a->soa.expire == b->soa.expire &&

a->soa.minimum == b->soa.minimum;

case DNS_TYPE_MX:

if (a->mx.priority != b->mx.priority)

return 0;

return dns_name_equal(a->mx.exchange, b->mx.exchange);

case DNS_TYPE_LOC:

assert(a->loc.version == b->loc.version);

return a->loc.size == b->loc.size &&

a->loc.horiz_pre == b->loc.horiz_pre &&

a->loc.vert_pre == b->loc.vert_pre &&

a->loc.latitude == b->loc.latitude &&

a->loc.longitude == b->loc.longitude &&

a->loc.altitude == b->loc.altitude;

case DNS_TYPE_DS:

return a->ds.key_tag == b->ds.key_tag &&

a->ds.algorithm == b->ds.algorithm &&

a->ds.digest_type == b->ds.digest_type &&

a->ds.digest_size == b->ds.digest_size &&

memcmp(a->ds.digest, b->ds.digest, a->ds.digest_size) == 0;

case DNS_TYPE_SSHFP:

return a->sshfp.algorithm == b->sshfp.algorithm &&

a->sshfp.fptype == b->sshfp.fptype &&

a->sshfp.fingerprint_size == b->sshfp.fingerprint_size &&

memcmp(a->sshfp.fingerprint, b->sshfp.fingerprint, a->sshfp.fingerprint_size) == 0;

case DNS_TYPE_DNSKEY:

return a->dnskey.flags == b->dnskey.flags &&

a->dnskey.protocol == b->dnskey.protocol &&

a->dnskey.algorithm == b->dnskey.algorithm &&

a->dnskey.key_size == b->dnskey.key_size &&

memcmp(a->dnskey.key, b->dnskey.key, a->dnskey.key_size) == 0;

case DNS_TYPE_RRSIG:

/* do the fast comparisons first */

if (a->rrsig.type_covered != b->rrsig.type_covered ||

a->rrsig.algorithm != b->rrsig.algorithm ||

a->rrsig.labels != b->rrsig.labels ||

a->rrsig.original_ttl != b->rrsig.original_ttl ||

a->rrsig.expiration != b->rrsig.expiration ||

a->rrsig.inception != b->rrsig.inception ||

a->rrsig.key_tag != b->rrsig.key_tag ||

a->rrsig.signature_size != b->rrsig.signature_size ||

memcmp(a->rrsig.signature, b->rrsig.signature, a->rrsig.signature_size) != 0)

return false;

return dns_name_equal(a->rrsig.signer, b->rrsig.signer);

case DNS_TYPE_NSEC:

return dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name) &&

bitmap_equal(a->nsec.types, b->nsec.types);

case DNS_TYPE_NSEC3:

return a->nsec3.algorithm == b->nsec3.algorithm &&

a->nsec3.flags == b->nsec3.flags &&

a->nsec3.iterations == b->nsec3.iterations &&

a->nsec3.salt_size == b->nsec3.salt_size &&

memcmp(a->nsec3.salt, b->nsec3.salt, a->nsec3.salt_size) == 0 &&

memcmp(a->nsec3.next_hashed_name, b->nsec3.next_hashed_name, a->nsec3.next_hashed_name_size) == 0 &&

bitmap_equal(a->nsec3.types, b->nsec3.types);

default:

return a->generic.size == b->generic.size &&

memcmp(a->generic.data, b->generic.data, a->generic.size) == 0;

}

}

static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude,

uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) {

char *s;

char NS = latitude >= 1U<<31 ? 'N' : 'S';

char EW = longitude >= 1U<<31 ? 'E' : 'W';

int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude);

int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude);

double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude);

double siz = (size >> 4) * exp10((double) (size & 0xF));

double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF));

double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF));

if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm",

(lat / 60000 / 60),

(lat / 60000) % 60,

(lat % 60000) / 1000.,

NS,

(lon / 60000 / 60),

(lon / 60000) % 60,

(lon % 60000) / 1000.,

EW,

alt / 100.,

siz / 100.,

hor / 100.,

ver / 100.) < 0)

return NULL;

return s;

}

static int format_timestamp_dns(char *buf, size_t l, time_t sec) {

struct tm tm;

assert(buf);

assert(l > strlen("YYYYMMDDHHmmSS"));

if (!gmtime_r(&sec, &tm))

return -EINVAL;

if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0)

return -EINVAL;

return 0;

}

static char *format_types(Bitmap *types) {

_cleanup_strv_free_ char **strv = NULL;

_cleanup_free_ char *str = NULL;

Iterator i;

unsigned type;

int r;

BITMAP_FOREACH(type, types, i) {

if (dns_type_to_string(type)) {

r = strv_extend(&strv, dns_type_to_string(type));

if (r < 0)

return NULL;

} else {

char *t;

r = asprintf(&t, "TYPE%u", type);

if (r < 0)

return NULL;

r = strv_consume(&strv, t);

if (r < 0)

return NULL;

}

}

str = strv_join(strv, " ");

if (!str)

return NULL;

return strjoin("( ", str, " )", NULL);

}

static char *format_txt(DnsTxtItem *first) {

DnsTxtItem *i;

size_t c = 1;

char *p, *s;

LIST_FOREACH(items, i, first)

c += i->length * 4 + 3;

p = s = new(char, c);

if (!s)

return NULL;

LIST_FOREACH(items, i, first) {

size_t j;

if (i != first)

*(p++) = ' ';

*(p++) = '"';

for (j = 0; j < i->length; j++) {

if (i->data[j] < ' ' || i->data[j] == '"' || i->data[j] >= 127) {

*(p++) = '\\';

*(p++) = '0' + (i->data[j] / 100);

*(p++) = '0' + ((i->data[j] / 10) % 10);

*(p++) = '0' + (i->data[j] % 10);

} else

*(p++) = i->data[j];

}

*(p++) = '"';

}

*p = 0;

return s;

}

const char *dns_resource_record_to_string(DnsResourceRecord *rr) {

_cleanup_free_ char *k = NULL, *t = NULL;

char *s;

int r;

assert(rr);

if (rr->to_string)

return rr->to_string;

r = dns_resource_key_to_string(rr->key, &k);

if (r < 0)

return NULL;

switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) {

case DNS_TYPE_SRV:

r = asprintf(&s, "%s %u %u %u %s",

k,

rr->srv.priority,

rr->srv.weight,

rr->srv.port,

strna(rr->srv.name));

if (r < 0)

return NULL;

break;

case DNS_TYPE_PTR:

case DNS_TYPE_NS:

case DNS_TYPE_CNAME:

case DNS_TYPE_DNAME:

s = strjoin(k, " ", rr->ptr.name, NULL);

if (!s)

return NULL;

break;

case DNS_TYPE_HINFO:

s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL);

if (!s)

return NULL;

break;

case DNS_TYPE_SPF: /* exactly the same as TXT */

case DNS_TYPE_TXT:

t = format_txt(rr->txt.items);

if (!t)

return NULL;

s = strjoin(k, " ", t, NULL);

if (!s)

return NULL;

break;

case DNS_TYPE_A: {

_cleanup_free_ char *x = NULL;

r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x);

if (r < 0)

return NULL;

s = strjoin(k, " ", x, NULL);

if (!s)

return NULL;

break;

}

case DNS_TYPE_AAAA:

r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t);

if (r < 0)

return NULL;

s = strjoin(k, " ", t, NULL);

if (!s)

return NULL;

break;

case DNS_TYPE_SOA:

r = asprintf(&s, "%s %s %s %u %u %u %u %u",

k,

strna(rr->soa.mname),

strna(rr->soa.rname),

rr->soa.serial,

rr->soa.refresh,

rr->soa.retry,

rr->soa.expire,

rr->soa.minimum);

if (r < 0)

return NULL;

break;

case DNS_TYPE_MX:

r = asprintf(&s, "%s %u %s",

k,

rr->mx.priority,

rr->mx.exchange);

if (r < 0)

return NULL;

break;

case DNS_TYPE_LOC:

assert(rr->loc.version == 0);

t = format_location(rr->loc.latitude,

rr->loc.longitude,

rr->loc.altitude,

rr->loc.size,

rr->loc.horiz_pre,

rr->loc.vert_pre);

if (!t)

return NULL;

s = strjoin(k, " ", t, NULL);

if (!s)

return NULL;

break;

case DNS_TYPE_DS:

t = hexmem(rr->ds.digest, rr->ds.digest_size);

if (!t)

return NULL;

r = asprintf(&s, "%s %u %u %u %s",

k,

rr->ds.key_tag,

rr->ds.algorithm,

rr->ds.digest_type,

t);

if (r < 0)

return NULL;

break;

case DNS_TYPE_SSHFP:

t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size);

if (!t)

return NULL;

r = asprintf(&s, "%s %u %u %s",

k,

rr->sshfp.algorithm,

rr->sshfp.fptype,

t);

if (r < 0)

return NULL;

break;

case DNS_TYPE_DNSKEY: {

const char *alg;

alg = dnssec_algorithm_to_string(rr->dnskey.algorithm);

t = base64mem(rr->dnskey.key, rr->dnskey.key_size);

if (!t)

return NULL;

r = asprintf(&s, "%s %u %u %.*s%.*u %s",

k,

rr->dnskey.flags,

rr->dnskey.protocol,

alg ? -1 : 0, alg,

alg ? 0 : 1, alg ? 0u : (unsigned) rr->dnskey.algorithm,

t);

if (r < 0)

return NULL;

break;

}

case DNS_TYPE_RRSIG: {

const char *type, *alg;

char expiration[strlen("YYYYMMDDHHmmSS") + 1], inception[strlen("YYYYMMDDHHmmSS") + 1];

type = dns_type_to_string(rr->rrsig.type_covered);

alg = dnssec_algorithm_to_string(rr->rrsig.algorithm);

t = base64mem(rr->rrsig.signature, rr->rrsig.signature_size);

if (!t)

return NULL;

r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration);

if (r < 0)

return NULL;

r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception);

if (r < 0)

return NULL;

/* TYPE?? follows

r = asprintf(&s, "%s %s%.*u %.*s%.*u %u %u %s %s %u %s %s",

k,

type ?: "TYPE",

type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered,

alg ? -1 : 0, alg,

alg ? 0 : 1, alg ? 0u : (unsigned) rr->rrsig.algorithm,

rr->rrsig.labels,

rr->rrsig.original_ttl,

expiration,

inception,

rr->rrsig.key_tag,

rr->rrsig.signer,

t);

if (r < 0)

return NULL;

break;

}

case DNS_TYPE_NSEC:

t = format_types(rr->nsec.types);

if (!t)

return NULL;

r = asprintf(&s, "%s %s %s",

k,

rr->nsec.next_domain_name,

t);

if (r < 0)

return NULL;

break;

case DNS_TYPE_NSEC3: {

_cleanup_free_ char *salt = NULL, *hash = NULL;

if (rr->nsec3.salt_size > 0) {

salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size);

if (!salt)

return NULL;

}

hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false);

if (!hash)

return NULL;

t = format_types(rr->nsec3.types);

if (!t)

return NULL;

r = asprintf(&s, "%s %"PRIu8" %"PRIu8" %"PRIu16" %s %s %s",

k,

rr->nsec3.algorithm,

rr->nsec3.flags,

rr->nsec3.iterations,

rr->nsec3.salt_size > 0 ? salt : "-",

hash,

t);

if (r < 0)

return NULL;

break;

}

default:

t = hexmem(rr->generic.data, rr->generic.size);

if (!t)

return NULL;

/* Format as documented in RFC 3597, Section 5 */

r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.size, t);

if (r < 0)

return NULL;

break;

}

rr->to_string = s;

return s;

}

int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical) {

DnsPacket packet = {

.n_ref = 1,

.protocol = DNS_PROTOCOL_DNS,

.on_stack = true,

.refuse_compression = true,

.canonical_form = canonical,

};

size_t start, rds;

int r;

assert(rr);

/* Generates the RR in wire-format, optionally in the

if (rr->wire_format && rr->wire_format_canonical == canonical)

return 0;

r = dns_packet_append_rr(&packet, rr, &start, &rds);

if (r < 0)

return r;

assert(start == 0);

assert(packet._data);

free(rr->wire_format);

rr->wire_format = packet._data;

rr->wire_format_size = packet.size;

rr->wire_format_rdata_offset = rds;

rr->wire_format_canonical = canonical;

packet._data = NULL;

dns_packet_unref(&packet);

return 0;

}

DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i) {

DnsTxtItem *n;

if (!i)

return NULL;

n = i->items_next;

free(i);

return dns_txt_item_free_all(n);

}

bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) {

if (a == b)

return true;

if (!a != !b)

return false;

if (!a)

return true;

if (a->length != b->length)

return false;

if (memcmp(a->data, b->data, a->length) != 0)

return false;

return dns_txt_item_equal(a->items_next, b->items_next);

}

static const char* const dnssec_algorithm_table[_DNSSEC_ALGORITHM_MAX_DEFINED] = {

/* Mnemonics as listed on https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */

[DNSSEC_ALGORITHM_RSAMD5] = "RSAMD5",

[DNSSEC_ALGORITHM_DH] = "DH",

[DNSSEC_ALGORITHM_DSA] = "DSA",

[DNSSEC_ALGORITHM_ECC] = "ECC",

[DNSSEC_ALGORITHM_RSASHA1] = "RSASHA1",

[DNSSEC_ALGORITHM_DSA_NSEC3_SHA1] = "DSA-NSEC3-SHA1",

[DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1] = "RSASHA1-NSEC3-SHA1",

[DNSSEC_ALGORITHM_RSASHA256] = "RSASHA256",

[DNSSEC_ALGORITHM_RSASHA512] = "RSASHA512",

[DNSSEC_ALGORITHM_ECC_GOST] = "ECC-GOST",

[DNSSEC_ALGORITHM_ECDSAP256SHA256] = "ECDSAP256SHA256",

[DNSSEC_ALGORITHM_ECDSAP384SHA384] = "ECDSAP384SHA384",

[DNSSEC_ALGORITHM_INDIRECT] = "INDIRECT",

[DNSSEC_ALGORITHM_PRIVATEDNS] = "PRIVATEDNS",

[DNSSEC_ALGORITHM_PRIVATEOID] = "PRIVATEOID",

};

DEFINE_STRING_TABLE_LOOKUP(dnssec_algorithm, int);

static const char* const dnssec_digest_table[_DNSSEC_DIGEST_MAX_DEFINED] = {

/* Names as listed on https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml */

[DNSSEC_DIGEST_SHA1] = "SHA-1",

[DNSSEC_DIGEST_SHA256] = "SHA-256",

[DNSSEC_DIGEST_GOST_R_34_11_94] = "GOST_R_34.11-94",

[DNSSEC_DIGEST_SHA384] = "SHA-384",

};

DEFINE_STRING_TABLE_LOOKUP(dnssec_digest, int);