2014-07-16 00:26:02 +02:00
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2014 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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2014-07-17 19:38:37 +02:00
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#include "resolved-dns-domain.h"
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2014-07-16 00:26:02 +02:00
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#include "resolved-dns-rr.h"
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2014-07-22 21:48:41 +02:00
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DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) {
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DnsResourceKey *k;
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size_t l;
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2014-07-16 00:26:02 +02:00
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2014-07-22 21:48:41 +02:00
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assert(name);
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l = strlen(name);
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k = malloc0(sizeof(DnsResourceKey) + l + 1);
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if (!k)
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return NULL;
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k->n_ref = 1;
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k->class = class;
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k->type = type;
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strcpy((char*) k + sizeof(DnsResourceKey), name);
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return k;
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}
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DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) {
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DnsResourceKey *k;
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assert(name);
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k = new0(DnsResourceKey, 1);
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if (!k)
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return NULL;
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k->n_ref = 1;
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k->class = class;
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k->type = type;
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k->_name = name;
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return k;
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}
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DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) {
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if (!k)
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return NULL;
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assert(k->n_ref > 0);
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k->n_ref++;
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return k;
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}
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DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) {
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if (!k)
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return NULL;
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assert(k->n_ref > 0);
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if (k->n_ref == 1) {
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free(k->_name);
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free(k);
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} else
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k->n_ref--;
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return NULL;
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}
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int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) {
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int r;
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r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b));
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if (r <= 0)
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return r;
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if (a->class != b->class)
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return 0;
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if (a->type != b->type)
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return 0;
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return 1;
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}
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int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr) {
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assert(key);
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assert(rr);
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if (rr->key->class != key->class && key->class != DNS_CLASS_ANY)
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return 0;
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if (rr->key->type != key->type && key->type != DNS_TYPE_ANY)
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return 0;
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return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key));
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}
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int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr) {
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assert(key);
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assert(rr);
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if (rr->key->class != key->class && key->class != DNS_CLASS_ANY)
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return 0;
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if (rr->key->type != DNS_TYPE_CNAME)
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return 0;
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return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key));
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2014-07-16 00:26:02 +02:00
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}
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2014-07-17 19:38:37 +02:00
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unsigned long dns_resource_key_hash_func(const void *i, const uint8_t hash_key[HASH_KEY_SIZE]) {
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const DnsResourceKey *k = i;
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unsigned long ul;
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2014-07-22 21:48:41 +02:00
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ul = dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), hash_key);
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2014-07-17 19:38:37 +02:00
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ul = ul * hash_key[0] + ul + k->class;
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ul = ul * hash_key[1] + ul + k->type;
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return ul;
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}
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int dns_resource_key_compare_func(const void *a, const void *b) {
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const DnsResourceKey *x = a, *y = b;
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int ret;
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2014-07-22 21:48:41 +02:00
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ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y));
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2014-07-17 19:38:37 +02:00
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if (ret != 0)
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return ret;
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if (x->type < y->type)
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return -1;
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if (x->type > y->type)
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return 1;
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if (x->class < y->class)
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return -1;
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if (x->class > y->class)
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return 1;
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return 0;
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}
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2014-07-22 21:48:41 +02:00
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DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) {
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2014-07-16 00:26:02 +02:00
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DnsResourceRecord *rr;
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rr = new0(DnsResourceRecord, 1);
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if (!rr)
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return NULL;
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rr->n_ref = 1;
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2014-07-22 21:48:41 +02:00
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rr->key = dns_resource_key_ref(key);
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2014-07-16 00:26:02 +02:00
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return rr;
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}
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DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) {
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if (!rr)
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return NULL;
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assert(rr->n_ref > 0);
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rr->n_ref++;
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return rr;
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}
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DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) {
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if (!rr)
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return NULL;
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assert(rr->n_ref > 0);
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if (rr->n_ref > 1) {
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rr->n_ref--;
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return NULL;
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}
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2014-07-22 21:48:41 +02:00
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if (rr->key) {
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if (IN_SET(rr->key->type, DNS_TYPE_PTR, DNS_TYPE_NS, DNS_TYPE_CNAME))
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free(rr->ptr.name);
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else if (rr->key->type == DNS_TYPE_HINFO) {
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free(rr->hinfo.cpu);
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free(rr->hinfo.os);
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2014-07-23 00:57:25 +02:00
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} else if (rr->key->type == DNS_TYPE_SOA) {
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free(rr->soa.mname);
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free(rr->soa.rname);
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2014-07-22 21:48:41 +02:00
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} else if (!IN_SET(rr->key->type, DNS_TYPE_A, DNS_TYPE_AAAA))
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free(rr->generic.data);
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2014-07-17 19:38:37 +02:00
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2014-07-22 21:48:41 +02:00
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dns_resource_key_unref(rr->key);
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}
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2014-07-17 19:38:37 +02:00
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2014-07-22 21:48:41 +02:00
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free(rr);
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2014-07-17 19:38:37 +02:00
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return NULL;
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}
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int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) {
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int r;
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assert(a);
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assert(b);
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2014-07-22 21:48:41 +02:00
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r = dns_resource_key_equal(a->key, b->key);
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2014-07-17 19:38:37 +02:00
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if (r <= 0)
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return r;
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2014-07-22 21:48:41 +02:00
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if (IN_SET(a->key->type, DNS_TYPE_PTR, DNS_TYPE_NS, DNS_TYPE_CNAME))
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2014-07-17 19:38:37 +02:00
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return dns_name_equal(a->ptr.name, b->ptr.name);
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2014-07-22 21:48:41 +02:00
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else if (a->key->type == DNS_TYPE_HINFO)
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2014-07-17 19:38:37 +02:00
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return strcasecmp(a->hinfo.cpu, b->hinfo.cpu) == 0 &&
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strcasecmp(a->hinfo.os, b->hinfo.os) == 0;
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2014-07-22 21:48:41 +02:00
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else if (a->key->type == DNS_TYPE_A)
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2014-07-17 19:38:37 +02:00
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return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0;
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2014-07-22 21:48:41 +02:00
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else if (a->key->type == DNS_TYPE_AAAA)
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2014-07-17 19:38:37 +02:00
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return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0;
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2014-07-23 00:57:25 +02:00
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else if (a->key->type == DNS_TYPE_SOA) {
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r = dns_name_equal(a->soa.mname, b->soa.mname);
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if (r <= 0)
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return r;
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r = dns_name_equal(a->soa.rname, b->soa.rname);
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if (r <= 0)
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return r;
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return a->soa.serial == b->soa.serial &&
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a->soa.refresh == b->soa.refresh &&
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a->soa.retry == b->soa.retry &&
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a->soa.expire == b->soa.expire &&
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a->soa.minimum == b->soa.minimum;
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} else
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2014-07-17 19:38:37 +02:00
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return a->generic.size == b->generic.size &&
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memcmp(a->generic.data, b->generic.data, a->generic.size) == 0;
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}
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const char *dns_class_to_string(uint16_t class) {
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switch (class) {
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case DNS_CLASS_IN:
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return "IN";
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case DNS_CLASS_ANY:
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return "ANY";
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}
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return NULL;
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}
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const char *dns_type_to_string(uint16_t type) {
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switch (type) {
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case DNS_TYPE_A:
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return "A";
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case DNS_TYPE_NS:
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return "NS";
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case DNS_TYPE_CNAME:
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return "CNAME";
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case DNS_TYPE_SOA:
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return "SOA";
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case DNS_TYPE_PTR:
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return "PTR";
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case DNS_TYPE_HINFO:
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return "HINFO";
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case DNS_TYPE_MX:
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return "MX";
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case DNS_TYPE_TXT:
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return "TXT";
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case DNS_TYPE_AAAA:
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return "AAAA";
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case DNS_TYPE_SRV:
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return "SRV";
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case DNS_TYPE_SSHFP:
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return "SSHFP";
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case DNS_TYPE_DNAME:
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return "DNAME";
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case DNS_TYPE_ANY:
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return "ANY";
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case DNS_TYPE_OPT:
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return "OPT";
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case DNS_TYPE_TKEY:
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return "TKEY";
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case DNS_TYPE_TSIG:
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return "TSIG";
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case DNS_TYPE_IXFR:
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return "IXFR";
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case DNS_TYPE_AXFR:
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return "AXFR";
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}
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return NULL;
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}
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