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-rw-r--r--src/resolve/resolved-dns-question.c468
1 files changed, 0 insertions, 468 deletions
diff --git a/src/resolve/resolved-dns-question.c b/src/resolve/resolved-dns-question.c
deleted file mode 100644
index c8b502d1cd..0000000000
--- a/src/resolve/resolved-dns-question.c
+++ /dev/null
@@ -1,468 +0,0 @@
-/***
- 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 "alloc-util.h"
-#include "dns-domain.h"
-#include "dns-type.h"
-#include "resolved-dns-question.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(key);
-
- if (!q)
- return -ENOSPC;
-
- 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, const char *search_domain) {
- unsigned i;
- int r;
-
- assert(rr);
-
- if (!q)
- return 0;
-
- for (i = 0; i < q->n_keys; i++) {
- r = dns_resource_key_match_rr(q->keys[i], rr, search_domain);
- if (r != 0)
- return r;
- }
-
- return 0;
-}
-
-int dns_question_matches_cname_or_dname(DnsQuestion *q, DnsResourceRecord *rr, const char *search_domain) {
- unsigned i;
- int r;
-
- assert(rr);
-
- if (!q)
- return 0;
-
- if (!IN_SET(rr->key->type, DNS_TYPE_CNAME, DNS_TYPE_DNAME))
- return 0;
-
- for (i = 0; i < q->n_keys; i++) {
- /* For a {C,D}NAME record we can never find a matching {C,D}NAME record */
- if (!dns_type_may_redirect(q->keys[i]->type))
- return 0;
-
- r = dns_resource_key_match_cname_or_dname(q->keys[i], rr->key, search_domain);
- if (r != 0)
- return r;
- }
-
- return 0;
-}
-
-int dns_question_is_valid_for_query(DnsQuestion *q) {
- const char *name;
- unsigned i;
- int r;
-
- if (!q)
- return 0;
-
- 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 = 0; i < q->n_keys; i++) {
- assert(q->keys[i]);
-
- if (i > 0) {
- r = dns_name_equal(dns_resource_key_name(q->keys[i]), name);
- if (r <= 0)
- return r;
- }
-
- if (!dns_type_is_valid_query(q->keys[i]->type))
- return 0;
- }
-
- return 1;
-}
-
-int dns_question_contains(DnsQuestion *a, const DnsResourceKey *k) {
- unsigned j;
- int r;
-
- assert(k);
-
- if (!a)
- return 0;
-
- for (j = 0; j < a->n_keys; j++) {
- r = dns_resource_key_equal(a->keys[j], k);
- if (r != 0)
- return r;
- }
-
- return 0;
-}
-
-int dns_question_is_equal(DnsQuestion *a, DnsQuestion *b) {
- unsigned j;
- int r;
-
- if (a == b)
- return 1;
-
- if (!a)
- return !b || b->n_keys == 0;
- if (!b)
- return a->n_keys == 0;
-
- /* Checks if all keys in a are also contained b, and vice versa */
-
- for (j = 0; j < a->n_keys; j++) {
- r = dns_question_contains(b, a->keys[j]);
- if (r <= 0)
- return r;
- }
-
- for (j = 0; j < b->n_keys; j++) {
- r = dns_question_contains(a, b->keys[j]);
- if (r <= 0)
- return r;
- }
-
- return 1;
-}
-
-int dns_question_cname_redirect(DnsQuestion *q, const DnsResourceRecord *cname, DnsQuestion **ret) {
- _cleanup_(dns_question_unrefp) DnsQuestion *n = NULL;
- DnsResourceKey *key;
- bool same = true;
- int r;
-
- assert(cname);
- assert(ret);
- assert(IN_SET(cname->key->type, DNS_TYPE_CNAME, DNS_TYPE_DNAME));
-
- if (dns_question_size(q) <= 0) {
- *ret = NULL;
- return 0;
- }
-
- DNS_QUESTION_FOREACH(key, q) {
- _cleanup_free_ char *destination = NULL;
- const char *d;
-
- if (cname->key->type == DNS_TYPE_CNAME)
- d = cname->cname.name;
- else {
- r = dns_name_change_suffix(dns_resource_key_name(key), dns_resource_key_name(cname->key), cname->dname.name, &destination);
- if (r < 0)
- return r;
- if (r == 0)
- continue;
-
- d = destination;
- }
-
- r = dns_name_equal(dns_resource_key_name(key), d);
- if (r < 0)
- return r;
-
- if (r == 0) {
- same = false;
- break;
- }
- }
-
- /* Fully the same, indicate we didn't do a thing */
- if (same) {
- *ret = NULL;
- return 0;
- }
-
- n = dns_question_new(q->n_keys);
- if (!n)
- return -ENOMEM;
-
- /* Create a new question, and patch in the new name */
- DNS_QUESTION_FOREACH(key, q) {
- _cleanup_(dns_resource_key_unrefp) DnsResourceKey *k = NULL;
-
- k = dns_resource_key_new_redirect(key, cname);
- if (!k)
- return -ENOMEM;
-
- r = dns_question_add(n, k);
- if (r < 0)
- return r;
- }
-
- *ret = n;
- n = NULL;
-
- return 1;
-}
-
-const char *dns_question_first_name(DnsQuestion *q) {
-
- if (!q)
- return NULL;
-
- if (q->n_keys < 1)
- return NULL;
-
- return dns_resource_key_name(q->keys[0]);
-}
-
-int dns_question_new_address(DnsQuestion **ret, int family, const char *name, bool convert_idna) {
- _cleanup_(dns_question_unrefp) DnsQuestion *q = NULL;
- _cleanup_free_ char *buf = NULL;
- int r;
-
- assert(ret);
- assert(name);
-
- if (!IN_SET(family, AF_INET, AF_INET6, AF_UNSPEC))
- return -EAFNOSUPPORT;
-
- if (convert_idna) {
- r = dns_name_apply_idna(name, &buf);
- if (r < 0)
- return r;
-
- name = buf;
- }
-
- q = dns_question_new(family == AF_UNSPEC ? 2 : 1);
- if (!q)
- return -ENOMEM;
-
- if (family != AF_INET6) {
- _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
-
- key = dns_resource_key_new(DNS_CLASS_IN, DNS_TYPE_A, name);
- if (!key)
- return -ENOMEM;
-
- r = dns_question_add(q, key);
- if (r < 0)
- return r;
- }
-
- if (family != AF_INET) {
- _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
-
- key = dns_resource_key_new(DNS_CLASS_IN, DNS_TYPE_AAAA, name);
- if (!key)
- return -ENOMEM;
-
- r = dns_question_add(q, key);
- if (r < 0)
- return r;
- }
-
- *ret = q;
- q = NULL;
-
- return 0;
-}
-
-int dns_question_new_reverse(DnsQuestion **ret, int family, const union in_addr_union *a) {
- _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
- _cleanup_(dns_question_unrefp) DnsQuestion *q = NULL;
- _cleanup_free_ char *reverse = NULL;
- int r;
-
- assert(ret);
- assert(a);
-
- if (!IN_SET(family, AF_INET, AF_INET6, AF_UNSPEC))
- return -EAFNOSUPPORT;
-
- r = dns_name_reverse(family, a, &reverse);
- if (r < 0)
- return r;
-
- q = dns_question_new(1);
- if (!q)
- return -ENOMEM;
-
- key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, reverse);
- if (!key)
- return -ENOMEM;
-
- reverse = NULL;
-
- r = dns_question_add(q, key);
- if (r < 0)
- return r;
-
- *ret = q;
- q = NULL;
-
- return 0;
-}
-
-int dns_question_new_service(
- DnsQuestion **ret,
- const char *service,
- const char *type,
- const char *domain,
- bool with_txt,
- bool convert_idna) {
-
- _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
- _cleanup_(dns_question_unrefp) DnsQuestion *q = NULL;
- _cleanup_free_ char *buf = NULL, *joined = NULL;
- const char *name;
- int r;
-
- assert(ret);
-
- /* We support three modes of invocation:
- *
- * 1. Only a domain is specified, in which case we assume a properly encoded SRV RR name, including service
- * type and possibly a service name. If specified in this way we assume it's already IDNA converted if
- * that's necessary.
- *
- * 2. Both service type and a domain specified, in which case a normal SRV RR is assumed, without a DNS-SD
- * style prefix. In this case we'll IDNA convert the domain, if that's requested.
- *
- * 3. All three of service name, type and domain are specified, in which case a DNS-SD service is put
- * together. The service name is never IDNA converted, and the domain is if requested.
- *
- * It's not supported to specify a service name without a type, or no domain name.
- */
-
- if (!domain)
- return -EINVAL;
-
- if (type) {
- if (convert_idna) {
- r = dns_name_apply_idna(domain, &buf);
- if (r < 0)
- return r;
-
- domain = buf;
- }
-
- r = dns_service_join(service, type, domain, &joined);
- if (r < 0)
- return r;
-
- name = joined;
- } else {
- if (service)
- return -EINVAL;
-
- name = domain;
- }
-
- q = dns_question_new(1 + with_txt);
- if (!q)
- return -ENOMEM;
-
- key = dns_resource_key_new(DNS_CLASS_IN, DNS_TYPE_SRV, name);
- if (!key)
- return -ENOMEM;
-
- r = dns_question_add(q, key);
- if (r < 0)
- return r;
-
- if (with_txt) {
- dns_resource_key_unref(key);
- key = dns_resource_key_new(DNS_CLASS_IN, DNS_TYPE_TXT, name);
- if (!key)
- return -ENOMEM;
-
- r = dns_question_add(q, key);
- if (r < 0)
- return r;
- }
-
- *ret = q;
- q = NULL;
-
- return 0;
-}
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