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