6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering

96cde13ace6406582688028f3df5668a172ba628Zbigniew Jędrzejewski-Szmek#include <math.h>

96cde13ace6406582688028f3df5668a172ba628Zbigniew Jędrzejewski-Szmek

96cde13ace6406582688028f3df5668a172ba628Zbigniew Jędrzejewski-Szmek#include "strv.h"

96cde13ace6406582688028f3df5668a172ba628Zbigniew Jędrzejewski-Szmek

143bfdaf0b890fa7acadf02d1eafacaef1b696bdHolger Hans Peter Freyther#include "dns-domain.h"

96cde13ace6406582688028f3df5668a172ba628Zbigniew Jędrzejewski-Szmek#include "resolved-dns-rr.h"

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering#include "resolved-dns-packet.h"

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering#include "dns-type.h"

96cde13ace6406582688028f3df5668a172ba628Zbigniew Jędrzejewski-Szmek

7027ff61a34a12487712b382a061c654acc3a679Lennart PoetteringDnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) {

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering DnsResourceKey *k;

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering size_t l;

96cde13ace6406582688028f3df5668a172ba628Zbigniew Jędrzejewski-Szmek

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering assert(name);

d7bd3de0654669e65b9642c248c5fa6d1d9a9f61Lennart Poettering

d7bd3de0654669e65b9642c248c5fa6d1d9a9f61Lennart Poettering l = strlen(name);

d7bd3de0654669e65b9642c248c5fa6d1d9a9f61Lennart Poettering k = malloc0(sizeof(DnsResourceKey) + l + 1);

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering if (!k)

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering return NULL;

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering k->n_ref = 1;

d7bd3de0654669e65b9642c248c5fa6d1d9a9f61Lennart Poettering k->class = class;

d7bd3de0654669e65b9642c248c5fa6d1d9a9f61Lennart Poettering k->type = type;

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering strcpy((char*) k + sizeof(DnsResourceKey), name);

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering return k;

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering}

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering

6c03089c32c251d823173bda4d809a9e643219f0Lennart PoetteringDnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) {

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering DnsResourceKey *k;

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering assert(name);

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

d7bd3de0654669e65b9642c248c5fa6d1d9a9f61Lennart Poettering k = new0(DnsResourceKey, 1);

d7bd3de0654669e65b9642c248c5fa6d1d9a9f61Lennart Poettering if (!k)

d7bd3de0654669e65b9642c248c5fa6d1d9a9f61Lennart Poettering return NULL;

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering k->n_ref = 1;

d7bd3de0654669e65b9642c248c5fa6d1d9a9f61Lennart Poettering k->class = class;

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering k->type = type;

d7bd3de0654669e65b9642c248c5fa6d1d9a9f61Lennart Poettering k->_name = name;

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering return k;

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering}

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering

6c03089c32c251d823173bda4d809a9e643219f0Lennart PoetteringDnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) {

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering if (!k)

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering return NULL;

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering assert(k->n_ref > 0);

374ec6abf31ada6ca554cc8ea99b282373fac010Lennart Poettering k->n_ref++;

374ec6abf31ada6ca554cc8ea99b282373fac010Lennart Poettering

374ec6abf31ada6ca554cc8ea99b282373fac010Lennart Poettering return k;

374ec6abf31ada6ca554cc8ea99b282373fac010Lennart Poettering}

374ec6abf31ada6ca554cc8ea99b282373fac010Lennart Poettering

d7bd3de0654669e65b9642c248c5fa6d1d9a9f61Lennart PoetteringDnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) {

d7bd3de0654669e65b9642c248c5fa6d1d9a9f61Lennart Poettering if (!k)

d7bd3de0654669e65b9642c248c5fa6d1d9a9f61Lennart Poettering return NULL;

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

d7bd3de0654669e65b9642c248c5fa6d1d9a9f61Lennart Poettering assert(k->n_ref > 0);

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering if (k->n_ref == 1) {

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering free(k->_name);

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering free(k);

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering } else

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering k->n_ref--;

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

96cde13ace6406582688028f3df5668a172ba628Zbigniew Jędrzejewski-Szmek return NULL;

96cde13ace6406582688028f3df5668a172ba628Zbigniew Jędrzejewski-Szmek}

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

374ec6abf31ada6ca554cc8ea99b282373fac010Lennart Poetteringint dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) {

374ec6abf31ada6ca554cc8ea99b282373fac010Lennart Poettering int r;

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b));

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering if (r <= 0)

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering return r;

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering if (a->class != b->class)

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering return 0;

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering if (a->type != b->type)

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering return 0;

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

374ec6abf31ada6ca554cc8ea99b282373fac010Lennart Poettering return 1;

374ec6abf31ada6ca554cc8ea99b282373fac010Lennart Poettering}

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poetteringint dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr) {

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering assert(key);

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering assert(rr);

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering if (rr->key->class != key->class && key->class != DNS_CLASS_ANY)

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering return 0;

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering if (rr->key->type != key->type && key->type != DNS_TYPE_ANY)

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering return 0;

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

374ec6abf31ada6ca554cc8ea99b282373fac010Lennart Poettering return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key));

374ec6abf31ada6ca554cc8ea99b282373fac010Lennart Poettering}

374ec6abf31ada6ca554cc8ea99b282373fac010Lennart Poettering

374ec6abf31ada6ca554cc8ea99b282373fac010Lennart Poetteringint dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr) {

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering assert(key);

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering assert(rr);

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering if (rr->key->class != key->class && key->class != DNS_CLASS_ANY)

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering return 0;

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering if (rr->key->type != DNS_TYPE_CNAME)

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering return 0;

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key));

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering}

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poetteringstatic unsigned long dns_resource_key_hash_func(const void *i, const uint8_t hash_key[HASH_KEY_SIZE]) {

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering const DnsResourceKey *k = i;

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering unsigned long ul;

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering ul = dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), hash_key);

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering ul = ul * hash_key[0] + ul + k->class;

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering ul = ul * hash_key[1] + ul + k->type;

1021b21bc6f8dd522b46116e8598b17f9f93f1b7Lennart Poettering

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering return ul;

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering}

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poetteringstatic int dns_resource_key_compare_func(const void *a, const void *b) {

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering const DnsResourceKey *x = a, *y = b;

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering int ret;

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y));

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering if (ret != 0)

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering return ret;

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering if (x->type < y->type)

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering return -1;

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering if (x->type > y->type)

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering return 1;

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering if (x->class < y->class)

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering return -1;

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering if (x->class > y->class)

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering return 1;

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering

1021b21bc6f8dd522b46116e8598b17f9f93f1b7Lennart Poettering return 0;

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering}

1021b21bc6f8dd522b46116e8598b17f9f93f1b7Lennart Poettering

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poetteringconst struct hash_ops dns_resource_key_hash_ops = {

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering .hash = dns_resource_key_hash_func,

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering .compare = dns_resource_key_compare_func

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering};

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poetteringint dns_resource_key_to_string(const DnsResourceKey *key, char **ret) {

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering char cbuf[strlen("CLASS") + DECIMAL_STR_MAX(uint16_t)], tbuf[strlen("TYPE") + DECIMAL_STR_MAX(uint16_t)];

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering const char *c, *t;

1021b21bc6f8dd522b46116e8598b17f9f93f1b7Lennart Poettering char *s;

1021b21bc6f8dd522b46116e8598b17f9f93f1b7Lennart Poettering

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering c = dns_class_to_string(key->class);

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering if (!c) {

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering sprintf(cbuf, "CLASS%u", key->class);

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering c = cbuf;

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering }

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering t = dns_type_to_string(key->type);

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering if (!t){

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering sprintf(tbuf, "TYPE%u", key->type);

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering t = tbuf;

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering }

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering if (asprintf(&s, "%s %s %-5s", DNS_RESOURCE_KEY_NAME(key), c, t) < 0)

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering return -ENOMEM;

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering

a0ab566574303be1ca12cdb334f284cfd407caa5Lennart Poettering *ret = s;

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering return 0;

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering}

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering

ae018d9bc900d6355dea4af05119b49c67945184Lennart PoetteringDnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) {

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering DnsResourceRecord *rr;

a0ab566574303be1ca12cdb334f284cfd407caa5Lennart Poettering

a0ab566574303be1ca12cdb334f284cfd407caa5Lennart Poettering rr = new0(DnsResourceRecord, 1);

a0ab566574303be1ca12cdb334f284cfd407caa5Lennart Poettering if (!rr)

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering return NULL;

ae018d9bc900d6355dea4af05119b49c67945184Lennart Poettering

78edb35ab4f4227485cb9ec816b43c37e0d5e62aLennart Poettering rr->n_ref = 1;

78edb35ab4f4227485cb9ec816b43c37e0d5e62aLennart Poettering rr->key = dns_resource_key_ref(key);

78edb35ab4f4227485cb9ec816b43c37e0d5e62aLennart Poettering

78edb35ab4f4227485cb9ec816b43c37e0d5e62aLennart Poettering return rr;

78edb35ab4f4227485cb9ec816b43c37e0d5e62aLennart Poettering}

78edb35ab4f4227485cb9ec816b43c37e0d5e62aLennart Poettering

78edb35ab4f4227485cb9ec816b43c37e0d5e62aLennart PoetteringDnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) {

78edb35ab4f4227485cb9ec816b43c37e0d5e62aLennart Poettering _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;

78edb35ab4f4227485cb9ec816b43c37e0d5e62aLennart Poettering

78edb35ab4f4227485cb9ec816b43c37e0d5e62aLennart Poettering key = dns_resource_key_new(class, type, name);

78edb35ab4f4227485cb9ec816b43c37e0d5e62aLennart Poettering if (!key)

78edb35ab4f4227485cb9ec816b43c37e0d5e62aLennart Poettering return NULL;

78edb35ab4f4227485cb9ec816b43c37e0d5e62aLennart Poettering

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering return dns_resource_record_new(key);

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering}

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering

a016b9228f338cb9b380ce7e00826ef462767d98Lennart PoetteringDnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) {

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering if (!rr)

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering return NULL;

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering assert(rr->n_ref > 0);

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering rr->n_ref++;

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering return rr;

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering}

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering

a016b9228f338cb9b380ce7e00826ef462767d98Lennart PoetteringDnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) {

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering if (!rr)

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering return NULL;

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering assert(rr->n_ref > 0);

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering

96cde13ace6406582688028f3df5668a172ba628Zbigniew Jędrzejewski-Szmek if (rr->n_ref > 1) {

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering rr->n_ref--;

6c03089c32c251d823173bda4d809a9e643219f0Lennart Poettering return NULL;

7027ff61a34a12487712b382a061c654acc3a679Lennart Poettering }

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering if (rr->key) {

9444b1f20e311f073864d81e913bd4f32fe95cfdLennart Poettering switch(rr->key->type) {

143bfdaf0b890fa7acadf02d1eafacaef1b696bdHolger Hans Peter Freyther

aff38e74bd776471f15ba54b305a24b0251eb865Lennart Poettering case DNS_TYPE_SRV:

143bfdaf0b890fa7acadf02d1eafacaef1b696bdHolger Hans Peter Freyther free(rr->srv.name);

78edb35ab4f4227485cb9ec816b43c37e0d5e62aLennart Poettering break;

a016b9228f338cb9b380ce7e00826ef462767d98Lennart Poettering

96cde13ace6406582688028f3df5668a172ba628Zbigniew Jędrzejewski-Szmek case DNS_TYPE_PTR:

96cde13ace6406582688028f3df5668a172ba628Zbigniew Jędrzejewski-Szmek case DNS_TYPE_NS:

96cde13ace6406582688028f3df5668a172ba628Zbigniew Jędrzejewski-Szmek case DNS_TYPE_CNAME:

case DNS_TYPE_DNAME:

free(rr->ptr.name);

break;

case DNS_TYPE_HINFO:

free(rr->hinfo.cpu);

free(rr->hinfo.os);

break;

case DNS_TYPE_TXT:

case DNS_TYPE_SPF:

strv_free(rr->txt.strings);

break;

case DNS_TYPE_SOA:

free(rr->soa.mname);

free(rr->soa.rname);

break;

case DNS_TYPE_MX:

free(rr->mx.exchange);

break;

case DNS_TYPE_DS:

free(rr->ds.digest);

break;

case DNS_TYPE_SSHFP:

free(rr->sshfp.fingerprint);

break;

case DNS_TYPE_DNSKEY:

free(rr->dnskey.key);

break;

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);

}

dns_resource_key_unref(rr->key);

}

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);

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 strv_equal(a->txt.strings, b->txt.strings);

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.zone_key_flag == b->dnskey.zone_key_flag &&

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

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);

}

int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) {

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

char *s;

int r;

assert(rr);

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

if (r < 0)

return r;

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 -ENOMEM;

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 -ENOMEM;

break;

case DNS_TYPE_HINFO:

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

if (!s)

return -ENOMEM;

break;

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

case DNS_TYPE_TXT:

t = strv_join_quoted(rr->txt.strings);

if (!t)

return -ENOMEM;

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

if (!s)

return -ENOMEM;

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 r;

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

if (!s)

return -ENOMEM;

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 r;

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

if (!s)

return -ENOMEM;

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 -ENOMEM;

break;

case DNS_TYPE_MX:

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

k,

rr->mx.priority,

rr->mx.exchange);

if (r < 0)

return -ENOMEM;

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 -ENOMEM;

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

if (!s)

return -ENOMEM;

break;

case DNS_TYPE_DS:

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

if (!t)

return -ENOMEM;

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 -ENOMEM;

break;

case DNS_TYPE_SSHFP:

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

if (!t)

return -ENOMEM;

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

k,

rr->sshfp.algorithm,

rr->sshfp.fptype,

t);

if (r < 0)

return -ENOMEM;

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 -ENOMEM;

r = asprintf(&s, "%s %u 3 %.*s%.*u %s",

k,

dnskey_to_flags(rr),

alg ? -1 : 0, alg,

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

t);

if (r < 0)

return -ENOMEM;

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 -ENOMEM;

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

if (r < 0)

return r;

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

if (r < 0)

return r;

/* 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 -ENOMEM;

break;

}

case DNS_TYPE_NSEC:

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

if (!t)

return -ENOMEM;

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

k,

rr->nsec.next_domain_name,

t);

if (r < 0)

return -ENOMEM;

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 -ENOMEM;

}

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

if (!hash)

return -ENOMEM;

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

if (!t)

return -ENOMEM;

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 -ENOMEM;

break;

}

default:

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

if (!t)

return -ENOMEM;

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

if (r < 0)

return -ENOMEM;

break;

}

*ret = s;

return 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;

}

int dns_class_from_string(const char *s, uint16_t *class) {

assert(s);

assert(class);

if (strcaseeq(s, "IN"))

*class = DNS_CLASS_IN;

else if (strcaseeq(s, "ANY"))

*class = DNS_CLASS_ANY;

else

return -EINVAL;

return 0;

}