+++ /dev/null
-/*-*- 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-question.h"
-#include "resolved-dns-domain.h"
-
-DnsQuestion *dns_question_new(unsigned n) {
- DnsQuestion *q;
-
- assert(n > 0);
-
- q = malloc0(offsetof(DnsQuestion, keys) + sizeof(DnsResourceKey*) * n);
- if (!q)
- return NULL;
-
- q->n_ref = 1;
- q->n_allocated = n;
-
- return q;
-}
-
-DnsQuestion *dns_question_ref(DnsQuestion *q) {
- if (!q)
- return NULL;
-
- assert(q->n_ref > 0);
- q->n_ref++;
- return q;
-}
-
-DnsQuestion *dns_question_unref(DnsQuestion *q) {
- if (!q)
- return NULL;
-
- assert(q->n_ref > 0);
-
- if (q->n_ref == 1) {
- unsigned i;
-
- for (i = 0; i < q->n_keys; i++)
- dns_resource_key_unref(q->keys[i]);
- free(q);
- } else
- q->n_ref--;
-
- return NULL;
-}
-
-int dns_question_add(DnsQuestion *q, DnsResourceKey *key) {
- unsigned i;
- int r;
-
- assert(q);
- assert(key);
-
- for (i = 0; i < q->n_keys; i++) {
- r = dns_resource_key_equal(q->keys[i], key);
- if (r < 0)
- return r;
- if (r > 0)
- return 0;
- }
-
- if (q->n_keys >= q->n_allocated)
- return -ENOSPC;
-
- q->keys[q->n_keys++] = dns_resource_key_ref(key);
- return 0;
-}
-
-int dns_question_matches_rr(DnsQuestion *q, DnsResourceRecord *rr) {
- unsigned i;
- int r;
-
- assert(q);
- assert(rr);
-
- for (i = 0; i < q->n_keys; i++) {
- r = dns_resource_key_match_rr(q->keys[i], rr);
- if (r != 0)
- return r;
- }
-
- return 0;
-}
-
-int dns_question_matches_cname(DnsQuestion *q, DnsResourceRecord *rr) {
- unsigned i;
- int r;
-
- assert(q);
- assert(rr);
-
- for (i = 0; i < q->n_keys; i++) {
- r = dns_resource_key_match_cname(q->keys[i], rr);
- if (r != 0)
- return r;
- }
-
- return 0;
-}
-
-int dns_question_is_valid(DnsQuestion *q) {
- const char *name;
- unsigned i;
- int r;
-
- assert(q);
-
- if (q->n_keys <= 0)
- return 0;
-
- if (q->n_keys > 65535)
- return 0;
-
- name = DNS_RESOURCE_KEY_NAME(q->keys[0]);
- if (!name)
- return 0;
-
- /* Check that all keys in this question bear the same name */
- for (i = 1; i < q->n_keys; i++) {
- assert(q->keys[i]);
-
- r = dns_name_equal(DNS_RESOURCE_KEY_NAME(q->keys[i]), name);
- if (r <= 0)
- return r;
- }
-
- return 1;
-}
-
-int dns_question_is_superset(DnsQuestion *q, DnsQuestion *other) {
- unsigned j;
- int r;
-
- assert(q);
- assert(other);
-
- /* Checks if all keys in "other" are also contained in "q" */
-
- for (j = 0; j < other->n_keys; j++) {
- DnsResourceKey *b = other->keys[j];
- bool found = false;
- unsigned i;
-
- for (i = 0; i < q->n_keys; i++) {
- DnsResourceKey *a = q->keys[i];
-
- r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b));
- if (r < 0)
- return r;
-
- if (r == 0)
- continue;
-
- if (a->class != b->class && a->class != DNS_CLASS_ANY)
- continue;
-
- if (a->type != b->type && a->type != DNS_TYPE_ANY)
- continue;
-
- found = true;
- break;
- }
-
- if (!found)
- return 0;
- }
-
- return 1;
-}
-
-int dns_question_cname_redirect(DnsQuestion *q, const char *name, DnsQuestion **ret) {
- _cleanup_(dns_question_unrefp) DnsQuestion *n = NULL;
- bool same = true;
- unsigned i;
- int r;
-
- assert(q);
- assert(name);
- assert(ret);
-
- for (i = 0; i < q->n_keys; i++) {
- r = dns_name_equal(DNS_RESOURCE_KEY_NAME(q->keys[i]), name);
- if (r < 0)
- return r;
-
- if (r == 0) {
- same = false;
- break;
- }
- }
-
- if (same) {
- /* Shortcut, the names are already right */
- *ret = dns_question_ref(q);
- return 0;
- }
-
- n = dns_question_new(q->n_keys);
- if (!n)
- return -ENOMEM;
-
- /* Create a new question, and patch in the new name */
- for (i = 0; i < q->n_keys; i++) {
- _cleanup_(dns_resource_key_unrefp) DnsResourceKey *k = NULL;
-
- k = dns_resource_key_new(q->keys[i]->class, q->keys[i]->type, name);
- if (!k)
- return -ENOMEM;
-
- r = dns_question_add(n, k);
- if (r < 0)
- return r;
- }
-
- *ret = n;
- n = NULL;
-
- return 1;
-}
-
-int dns_question_endswith(DnsQuestion *q, const char *suffix) {
- unsigned i;
-
- assert(q);
- assert(suffix);
-
- for (i = 0; i < q->n_keys; i++) {
- int k;
-
- k = dns_name_endswith(DNS_RESOURCE_KEY_NAME(q->keys[i]), suffix);
- if (k <= 0)
- return k;
- }
-
- return 1;
-}
-
-int dns_question_extract_reverse_address(DnsQuestion *q, int *family, union in_addr_union *address) {
- unsigned i;
-
- assert(q);
- assert(family);
- assert(address);
-
- for (i = 0; i < q->n_keys; i++) {
- int k;
-
- k = dns_name_address(DNS_RESOURCE_KEY_NAME(q->keys[i]), family, address);
- if (k != 0)
- return k;
- }
-
- return 0;
-}
~ianmdlvl / elogind.git / blobdiff