***/
#include "resolved-dns-answer.h"
+#include "resolved-dns-domain.h"
DnsAnswer *dns_answer_new(unsigned n) {
DnsAnswer *a;
}
int dns_answer_add(DnsAnswer *a, DnsResourceRecord *rr) {
+ unsigned i;
+ int r;
+
assert(a);
assert(rr);
+ for (i = 0; i < a->n_rrs; i++) {
+ r = dns_resource_record_equal(a->rrs[i], rr);
+ if (r < 0)
+ return r;
+ if (r > 0) {
+ /* Entry already exists, keep the entry with
+ * the higher RR, or the one with TTL 0 */
+
+ if (rr->ttl == 0 || (rr->ttl > a->rrs[i]->ttl && a->rrs[i]->ttl != 0)) {
+ dns_resource_record_ref(rr);
+ dns_resource_record_unref(a->rrs[i]);
+ a->rrs[i] = rr;
+ }
+
+ return 0;
+ }
+ }
+
if (a->n_rrs >= a->n_allocated)
return -ENOSPC;
a->rrs[a->n_rrs++] = dns_resource_record_ref(rr);
+ return 1;
+}
+
+int dns_answer_add_soa(DnsAnswer *a, const char *name, uint32_t ttl) {
+ _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *soa = NULL;
+
+ soa = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_SOA, name);
+ if (!soa)
+ return -ENOMEM;
+
+ soa->ttl = ttl;
+
+ soa->soa.mname = strdup(name);
+ if (!soa->soa.mname)
+ return -ENOMEM;
+
+ soa->soa.rname = strappend("root.", name);
+ if (!soa->soa.rname)
+ return -ENOMEM;
+
+ soa->soa.serial = 1;
+ soa->soa.refresh = 1;
+ soa->soa.retry = 1;
+ soa->soa.expire = 1;
+ soa->soa.minimum = ttl;
+
+ return dns_answer_add(a, soa);
+}
+
+int dns_answer_contains(DnsAnswer *a, DnsResourceKey *key) {
+ unsigned i;
+ int r;
+
+ assert(a);
+ assert(key);
+
+ for (i = 0; i < a->n_rrs; i++) {
+ r = dns_resource_key_match_rr(key, a->rrs[i]);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ return 1;
+ }
+
+ return 0;
+}
+
+int dns_answer_find_soa(DnsAnswer *a, DnsResourceKey *key, DnsResourceRecord **ret) {
+ unsigned i;
+
+ assert(a);
+ assert(key);
+ assert(ret);
+
+ /* For a SOA record we can never find a matching SOA record */
+ if (key->type == DNS_TYPE_SOA)
+ return 0;
+
+ for (i = 0; i < a->n_rrs; i++) {
+
+ if (a->rrs[i]->key->class != DNS_CLASS_IN)
+ continue;
+
+ if (a->rrs[i]->key->type != DNS_TYPE_SOA)
+ continue;
+
+ if (dns_name_endswith(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(a->rrs[i]->key))) {
+ *ret = a->rrs[i];
+ return 1;
+ }
+ }
+
return 0;
}
+
+DnsAnswer *dns_answer_merge(DnsAnswer *a, DnsAnswer *b) {
+ _cleanup_(dns_answer_unrefp) DnsAnswer *ret = NULL;
+ DnsAnswer *k;
+ unsigned i;
+ int r;
+
+ if (a && (!b || b->n_rrs <= 0))
+ return dns_answer_ref(a);
+ if ((!a || a->n_rrs <= 0) && b)
+ return dns_answer_ref(b);
+
+ ret = dns_answer_new((a ? a->n_rrs : 0) + (b ? b->n_rrs : 0));
+ if (!ret)
+ return NULL;
+
+ if (a) {
+ for (i = 0; i < a->n_rrs; i++) {
+ r = dns_answer_add(ret, a->rrs[i]);
+ if (r < 0)
+ return NULL;
+ }
+ }
+
+ if (b) {
+ for (i = 0; i < b->n_rrs; i++) {
+ r = dns_answer_add(ret, b->rrs[i]);
+ if (r < 0)
+ return NULL;
+ }
+ }
+
+ k = ret;
+ ret = NULL;
+
+ return k;
+}
+
+void dns_answer_order_by_scope(DnsAnswer *a, bool prefer_link_local) {
+ DnsResourceRecord **rrs;
+ unsigned i, start, end;
+ assert(a);
+
+ if (a->n_rrs <= 1)
+ return;
+
+ start = 0;
+ end = a->n_rrs-1;
+
+ /* RFC 4795, Section 2.6 suggests we should order entries
+ * depending on whether the sender is a link-local address. */
+
+ rrs = newa(DnsResourceRecord*, a->n_rrs);
+ for (i = 0; i < a->n_rrs; i++) {
+
+ if (a->rrs[i]->key->class == DNS_CLASS_IN &&
+ ((a->rrs[i]->key->type == DNS_TYPE_A && in_addr_is_link_local(AF_INET, (union in_addr_union*) &a->rrs[i]->a.in_addr) != prefer_link_local) ||
+ (a->rrs[i]->key->type == DNS_TYPE_AAAA && in_addr_is_link_local(AF_INET6, (union in_addr_union*) &a->rrs[i]->aaaa.in6_addr) != prefer_link_local)))
+ /* Order address records that are are not preferred to the end of the array */
+ rrs[end--] = a->rrs[i];
+ else
+ /* Order all other records to the beginning of the array */
+ rrs[start++] = a->rrs[i];
+ }
+
+ assert(start == end+1);
+ memcpy(a->rrs, rrs, sizeof(DnsResourceRecord*) * a->n_rrs);
+}