src/resolve/resolved-dns-query.c

	resolved-dns-query.c revision d634711b261dc72bb48765e8574ba43d455e82ec
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen/***
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen  This file is part of systemd.
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen  Copyright 2014 Lennart Poettering
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen  systemd is free software; you can redistribute it and/or modify it
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen  under the terms of the GNU Lesser General Public License as published by
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen  the Free Software Foundation; either version 2.1 of the License, or
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen  (at your option) any later version.
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen  systemd is distributed in the hope that it will be useful, but
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen  WITHOUT ANY WARRANTY; without even the implied warranty of
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen  Lesser General Public License for more details.
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen  You should have received a copy of the GNU Lesser General Public License
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen  along with systemd; If not, see <http://www.gnu.org/licenses/>.
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen***/
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering#include "hostname-util.h"
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering#include "dns-domain.h"
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "local-addresses.h"
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering#include "resolved-dns-query.h"
b5efdb8af40ea759a1ea584c1bc44ecc81dd00ceLennart Poettering
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering/* How long to wait for the query in total */
3ffd4af22052963e7a29431721ee204e634bea75Lennart Poettering#define QUERY_TIMEOUT_USEC (30 * USEC_PER_SEC)
a5a807e63a50314e190e9166d8a453cd8dd258e3Zbigniew Jędrzejewski-Szmek
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering#define CNAME_MAX 8
c004493cdefc1f43a3956ca529e8070f8d70be56Lennart Poettering#define QUERIES_MAX 2048
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poetteringstatic void dns_query_stop(DnsQuery *q) {
822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering        DnsTransaction *t;
6bedfcbb2970e06a4d3280c8fb62083d252ede73Lennart Poettering
3df3e884ae1237ef0d4d23b0e80f4ffda95ac135Ronny Chevalier        assert(q);
39d8db043b599a7382f94bfc904d5e108af438bdLennart Poettering
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering        q->timeout_event_source = sd_event_source_unref(q->timeout_event_source);
5f402ae84bbc08fe8de5682e371b3f66c387da52Daniel Mack
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering        while ((t = set_steal_first(q->transactions))) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                set_remove(t->queries, q);
bc7702b098b63031767174206f5df14a8ccb45cfDaniel Mack                dns_transaction_gc(t);
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering        }
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering}
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart PoetteringDnsQuery *dns_query_free(DnsQuery *q) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (!q)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen        dns_query_stop(q);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        set_free(q->transactions);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        dns_question_unref(q->question);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        dns_answer_unref(q->answer);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        sd_bus_message_unref(q->request);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        sd_bus_track_unref(q->bus_track);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (q->manager) {
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen                LIST_REMOVE(queries, q->manager->dns_queries, q);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                q->manager->n_dns_queries--;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        free(q);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringint dns_query_new(Manager *m, DnsQuery **ret, DnsQuestion *question, int ifindex, uint64_t flags) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        _cleanup_(dns_query_freep) DnsQuery *q = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        unsigned i;
a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering        int r;
a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(m);
a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering        assert(question);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = dns_question_is_valid(question);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (m->n_dns_queries >= QUERIES_MAX)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return -EBUSY;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        q = new0(DnsQuery, 1);
21d73c87b09ec2b8642424bc714ce9af3da4fc40Lennart Poettering        if (!q)
21d73c87b09ec2b8642424bc714ce9af3da4fc40Lennart Poettering                return -ENOMEM;
21d73c87b09ec2b8642424bc714ce9af3da4fc40Lennart Poettering
21d73c87b09ec2b8642424bc714ce9af3da4fc40Lennart Poettering        q->question = dns_question_ref(question);
a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering        q->ifindex = ifindex;
a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering        q->flags = flags;
a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        for (i = 0; i < question->n_keys; i++) {
a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering                _cleanup_free_ char *p;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                r = dns_resource_key_to_string(question->keys[i], &p);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (r < 0)
a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering                        return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                log_debug("Looking up RR for %s", p);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        LIST_PREPEND(queries, m->dns_queries, q);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        m->n_dns_queries++;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        q->manager = m;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (ret)
da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt                *ret = q;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        q = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 0;
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic void dns_query_complete(DnsQuery *q, DnsTransactionState state) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(q);
0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering        assert(!IN_SET(state, DNS_TRANSACTION_NULL, DNS_TRANSACTION_PENDING));
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(IN_SET(q->state, DNS_TRANSACTION_NULL, DNS_TRANSACTION_PENDING));
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        /* Note that this call might invalidate the query. Callers
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering         * should hence not attempt to access the query or transaction
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering         * after calling this function. */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        q->state = state;
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        dns_query_stop(q);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (q->complete)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                q->complete(q);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int on_query_timeout(sd_event_source *s, usec_t usec, void *userdata) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        DnsQuery *q = userdata;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(s);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(q);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        dns_query_complete(q, DNS_TRANSACTION_TIMEOUT);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int dns_query_add_transaction(DnsQuery *q, DnsScope *s, DnsResourceKey *key) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        DnsTransaction *t;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        int r;
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(q);
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen        assert(s);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(key);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = set_ensure_allocated(&q->transactions, NULL);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        t = dns_scope_find_transaction(s, key, true);
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen        if (!t) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                r = dns_transaction_new(&t, s, key);
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen                if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = set_ensure_allocated(&t->queries, NULL);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                goto gc;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = set_put(t->queries, q);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                goto gc;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = set_put(q->transactions, t);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                set_remove(t->queries, q);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                goto gc;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringgc:
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        dns_transaction_gc(t);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int dns_query_add_transaction_split(DnsQuery *q, DnsScope *s) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        unsigned i;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        int r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(q);
3e044c492e3ebe64f4e3175c94f9db8a62557b82Markus Elfring        assert(s);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        /* Create one transaction per question key */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        for (i = 0; i < q->question->n_keys; i++) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                r = dns_query_add_transaction(q, s, q->question->keys[i]);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (r < 0)
da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt                        return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
4afd3348c7506dd1d36305b7bcb9feb8952b9d6bLennart Poettering
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersenstatic int SYNTHESIZE_IFINDEX(int ifindex) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        /* When the caller asked for resolving on a specific
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering         * interface, we synthesize the answer for that
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering         * interface. However, if nothing specific was claimed and we
cc98b3025eeb89addb76a27390cb2baca4eab8b9Torstein Husebø         * only return localhost RRs, we synthesize the answer for
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen         * localhost. */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (ifindex > 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return ifindex;
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return LOOPBACK_IFINDEX;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersenstatic int SYNTHESIZE_FAMILY(uint64_t flags) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        /* Picks an address family depending on set flags. This is
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering         * purely for synthesized answers, where the family we return
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen         * for the reply should match what was requested in the
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering         * question, even though we are synthesizing the answer
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering         * here. */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen        if (!(flags & SD_RESOLVED_DNS)) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (flags & SD_RESOLVED_LLMNR_IPV4)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        return AF_INET;
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                if (flags & SD_RESOLVED_LLMNR_IPV6)
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen                        return AF_INET6;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return AF_UNSPEC;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic DnsProtocol SYNTHESIZE_PROTOCOL(uint64_t flags) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        /* Similar as SYNTHESIZE_FAMILY() but does this for the
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen         * protocol. If resolving via DNS was requested, we claim it
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering         * was DNS. Similar, if nothing specific was
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering         * requested. However, if only resolving via LLMNR was
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering         * requested we return that. */
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (flags & SD_RESOLVED_DNS)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return DNS_PROTOCOL_DNS;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (flags & SD_RESOLVED_LLMNR)
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen                return DNS_PROTOCOL_LLMNR;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return DNS_PROTOCOL_DNS;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int dns_type_to_af(uint16_t t) {
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen        switch (t) {
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        case DNS_TYPE_A:
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return AF_INET;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        case DNS_TYPE_AAAA:
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return AF_INET6;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen        case DNS_TYPE_ANY:
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return AF_UNSPEC;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        default:
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen                return -EINVAL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersenstatic int synthesize_localhost_rr(DnsQuery *q, DnsResourceKey *key, DnsAnswer **answer) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        int r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(q);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(key);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(answer);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = dns_answer_reserve(answer, 2);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (IN_SET(key->type, DNS_TYPE_A, DNS_TYPE_ANY)) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, DNS_RESOURCE_KEY_NAME(key));
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (!rr)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        return -ENOMEM;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                rr->a.in_addr.s_addr = htobe32(INADDR_LOOPBACK);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                r = dns_answer_add(*answer, rr, SYNTHESIZE_IFINDEX(q->ifindex));
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (r < 0)
da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt                        return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (IN_SET(key->type, DNS_TYPE_AAAA, DNS_TYPE_ANY)) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, DNS_RESOURCE_KEY_NAME(key));
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (!rr)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        return -ENOMEM;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                rr->aaaa.in6_addr = in6addr_loopback;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                r = dns_answer_add(*answer, rr, SYNTHESIZE_IFINDEX(q->ifindex));
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        return r;
0014a4ad505d119c7ac4346d9d774c3f17f663a5Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int answer_add_ptr(DnsAnswer **answer, const char *from, const char *to, int ifindex) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_PTR, from);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (!rr)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return -ENOMEM;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        rr->ptr.name = strdup(to);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (!rr->ptr.name)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return -ENOMEM;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return dns_answer_add(*answer, rr, ifindex);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poetteringstatic int synthesize_localhost_ptr(DnsQuery *q, DnsResourceKey *key, DnsAnswer **answer) {
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        int r;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        assert(q);
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        assert(key);
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        assert(answer);
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        r = dns_answer_reserve(answer, 1);
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        if (r < 0)
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                return r;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        if (IN_SET(key->type, DNS_TYPE_PTR, DNS_TYPE_ANY)) {
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                r = answer_add_ptr(answer, DNS_RESOURCE_KEY_NAME(key), "localhost", SYNTHESIZE_IFINDEX(q->ifindex));
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                if (r < 0)
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                        return r;
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        }
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        return 0;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering}
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poetteringstatic int answer_add_addresses_rr(
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                DnsAnswer **answer,
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                const char *name,
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                struct local_address *addresses,
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                unsigned n_addresses) {
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        unsigned j;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        int r;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        assert(answer);
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        assert(name);
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        r = dns_answer_reserve(answer, n_addresses);
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        if (r < 0)
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                return r;
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
422baca0f230913158078fddf884e06c8c64a316Lennart Poettering        for (j = 0; j < n_addresses; j++) {
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                r = dns_resource_record_new_address(&rr, addresses[j].family, &addresses[j].address, name);
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                if (r < 0)
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                        return r;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                r = dns_answer_add(*answer, rr, addresses[j].ifindex);
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                if (r < 0)
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                        return r;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        }
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        return 0;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering}
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poetteringstatic int answer_add_addresses_ptr(
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                DnsAnswer **answer,
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                const char *name,
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                struct local_address *addresses,
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                unsigned n_addresses,
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                int af, const union in_addr_union *match) {
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        unsigned j;
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        int r;
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        assert(answer);
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        assert(name);
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        for (j = 0; j < n_addresses; j++) {
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                if (af != AF_UNSPEC) {
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                        if (addresses[j].family != af)
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                                continue;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                        if (match && !in_addr_equal(af, match, &addresses[j].address))
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                                continue;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                }
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                r = dns_answer_reserve(answer, 1);
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                if (r < 0)
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                        return r;
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                r = dns_resource_record_new_reverse(&rr, addresses[j].family, &addresses[j].address, name);
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                if (r < 0)
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                        return r;
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                r = dns_answer_add(*answer, rr, addresses[j].ifindex);
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                if (r < 0)
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                        return r;
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        }
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        return 0;
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering}
56f64d95763a799ba4475daf44d8e9f72a1bd474Michal Schmidt
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poetteringstatic int synthesize_system_hostname_rr(DnsQuery *q, DnsResourceKey *key, DnsAnswer **answer) {
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        _cleanup_free_ struct local_address *addresses = NULL;
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        int n = 0, af;
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        assert(q);
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        assert(key);
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        assert(answer);
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
8d3d7072e609ef0e0fb37e1d19a29307d58146c3Michal Schmidt        af = dns_type_to_af(key->type);
8d3d7072e609ef0e0fb37e1d19a29307d58146c3Michal Schmidt        if (af >= 0) {
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                n = local_addresses(q->manager->rtnl, q->ifindex, af, &addresses);
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                if (n < 0)
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                        return n;
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                if (n == 0) {
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                        struct local_address buffer[2];
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                        /* If we have no local addresses then use ::1
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                         * and 127.0.0.2 as local ones. */
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                        if (af == AF_INET || af == AF_UNSPEC)
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                                buffer[n++] = (struct local_address) {
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                                        .family = AF_INET,
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                                        .ifindex = SYNTHESIZE_IFINDEX(q->ifindex),
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                                        .address.in.s_addr = htobe32(0x7F000002),
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                                };
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                        if (af == AF_INET6 || af == AF_UNSPEC)
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering                                buffer[n++] = (struct local_address) {
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering                                        .family = AF_INET6,
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering                                        .ifindex = SYNTHESIZE_IFINDEX(q->ifindex),
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering                                        .address.in6 = in6addr_loopback,
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering                                };
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering                        return answer_add_addresses_rr(answer, DNS_RESOURCE_KEY_NAME(key), buffer, n);
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering                }
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering        }
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering        return answer_add_addresses_rr(answer, DNS_RESOURCE_KEY_NAME(key), addresses, n);
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering}
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poetteringstatic int synthesize_system_hostname_ptr(DnsQuery *q, int af, const union in_addr_union *address, DnsAnswer **answer) {
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering        _cleanup_free_ struct local_address *addresses = NULL;
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering        int n, r;
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering        assert(q);
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering        assert(address);
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering        assert(answer);
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering        if (af == AF_INET && address->in.s_addr == htobe32(0x7F000002)) {
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering                /* Always map the IPv4 address 127.0.0.2 to the local
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering                 * hostname, in addition to "localhost": */
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                r = dns_answer_reserve(answer, 3);
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                if (r < 0)
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                        return r;
c92e531c82a9815ec349aa1bf31236b86b2d5311Lennart Poettering
c92e531c82a9815ec349aa1bf31236b86b2d5311Lennart Poettering                r = answer_add_ptr(answer, "2.0.0.127.in-addr.arpa", q->manager->llmnr_hostname, SYNTHESIZE_IFINDEX(q->ifindex));
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                if (r < 0)
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                        return r;
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                r = answer_add_ptr(answer, "2.0.0.127.in-addr.arpa", q->manager->mdns_hostname, SYNTHESIZE_IFINDEX(q->ifindex));
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                if (r < 0)
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering                        return r;
bc7702b098b63031767174206f5df14a8ccb45cfDaniel Mack
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                r = answer_add_ptr(answer, "2.0.0.127.in-addr.arpa", "localhost", SYNTHESIZE_IFINDEX(q->ifindex));
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                if (r < 0)
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering                        return r;
5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering
00fa60ae3b2823036cb3e7734f16bce30cb7441dLennart Poettering                return 0;
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen        }
0d2cd47617b423f37d7425be7a56ae2fca8ff9f6Lennart Poettering
0d2cd47617b423f37d7425be7a56ae2fca8ff9f6Lennart Poettering        n = local_addresses(q->manager->rtnl, q->ifindex, af, &addresses);
0d2cd47617b423f37d7425be7a56ae2fca8ff9f6Lennart Poettering        if (n < 0)
0d2cd47617b423f37d7425be7a56ae2fca8ff9f6Lennart Poettering                return n;
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen        r = answer_add_addresses_ptr(answer, q->manager->llmnr_hostname, addresses, n, af, address);
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen        if (r < 0)
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                return r;
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen        return answer_add_addresses_ptr(answer, q->manager->mdns_hostname, addresses, n, af, address);
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen}
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersenstatic int synthesize_gateway_rr(DnsQuery *q, DnsResourceKey *key, DnsAnswer **answer) {
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        _cleanup_free_ struct local_address *addresses = NULL;
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        int n = 0, af;
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering        assert(q);
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        assert(key);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(answer);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        af = dns_type_to_af(key->type);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (af >= 0) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                n = local_gateways(q->manager->rtnl, q->ifindex, af, &addresses);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (n < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        return n;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return answer_add_addresses_rr(answer, DNS_RESOURCE_KEY_NAME(key), addresses, n);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int synthesize_gateway_ptr(DnsQuery *q, int af, const union in_addr_union *address, DnsAnswer **answer) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        _cleanup_free_ struct local_address *addresses = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        int n;
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering        assert(q);
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen        assert(address);
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen        assert(answer);
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen        n = local_gateways(q->manager->rtnl, q->ifindex, af, &addresses);
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen        if (n < 0)
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                return n;
edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering
edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering        return answer_add_addresses_ptr(answer, "gateway", addresses, n, af, address);
edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering}
edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering
edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poetteringstatic int dns_query_synthesize_reply(DnsQuery *q, DnsTransactionState *state) {
edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering        _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL;
edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering        unsigned i;
edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering        int r;
edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering
bc7702b098b63031767174206f5df14a8ccb45cfDaniel Mack        assert(q);
bc7702b098b63031767174206f5df14a8ccb45cfDaniel Mack        assert(state);
bc7702b098b63031767174206f5df14a8ccb45cfDaniel Mack
bc7702b098b63031767174206f5df14a8ccb45cfDaniel Mack        /* Tries to synthesize localhost RR replies where appropriate */
edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering
edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering        if (!IN_SET(*state,
edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering                    DNS_TRANSACTION_FAILURE,
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                    DNS_TRANSACTION_NO_SERVERS,
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                    DNS_TRANSACTION_TIMEOUT,
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                    DNS_TRANSACTION_ATTEMPTS_MAX_REACHED))
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        for (i = 0; i < q->question->n_keys; i++) {
4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering                union in_addr_union address;
4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering                const char *name;
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering                int af;
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (q->question->keys[i]->class != DNS_CLASS_IN &&
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                    q->question->keys[i]->class != DNS_CLASS_ANY)
f0e1546763304aedc90e91d70dab9eeb7c966cf8Lennart Poettering                        continue;
f0e1546763304aedc90e91d70dab9eeb7c966cf8Lennart Poettering
f0e1546763304aedc90e91d70dab9eeb7c966cf8Lennart Poettering                name = DNS_RESOURCE_KEY_NAME(q->question->keys[i]);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
cab5b05903096e1c9cf5575ccc73f89d15c8db69Lennart Poettering                if (is_localhost(name)) {
cab5b05903096e1c9cf5575ccc73f89d15c8db69Lennart Poettering
f0e1546763304aedc90e91d70dab9eeb7c966cf8Lennart Poettering                        r = synthesize_localhost_rr(q, q->question->keys[i], &answer);
f0e1546763304aedc90e91d70dab9eeb7c966cf8Lennart Poettering                        if (r < 0)
f0e1546763304aedc90e91d70dab9eeb7c966cf8Lennart Poettering                                return log_error_errno(r, "Failed to synthesize localhost RRs: %m");
096b6773886bd7a0c8c97aa684b0b67dfae58355Lennart Poettering
096b6773886bd7a0c8c97aa684b0b67dfae58355Lennart Poettering                } else if (manager_is_own_hostname(q->manager, name)) {
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
a564ca2fd113b2876e677beab60b38d50591e246Lennart Poettering                        r = synthesize_system_hostname_rr(q, q->question->keys[i], &answer);
a564ca2fd113b2876e677beab60b38d50591e246Lennart Poettering                        if (r < 0)
a564ca2fd113b2876e677beab60b38d50591e246Lennart Poettering                                return log_error_errno(r, "Failed to synthesize system hostname RRs: %m");
edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering
bc7702b098b63031767174206f5df14a8ccb45cfDaniel Mack                } else if (is_gateway_hostname(name)) {
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                        r = synthesize_gateway_rr(q, q->question->keys[i], &answer);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                return log_error_errno(r, "Failed to synthesize gateway RRs: %m");
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering                } else if ((dns_name_endswith(name, "127.in-addr.arpa") > 0 && dns_name_equal(name, "2.0.0.127.in-addr.arpa") == 0) ||
4d506d6bb757af3b99e0876234c465e6898c5ea4Lennart Poettering                           dns_name_equal(name, "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa") > 0) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering                        r = synthesize_localhost_ptr(q, q->question->keys[i], &answer);
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                        if (r < 0)
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                                return log_error_errno(r, "Failed to synthesize localhost PTR RRs: %m");
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                } else if (dns_name_address(name, &af, &address) > 0) {
d9fcf2ba1abe81ed3a7a151d6db09139b4dc7a09Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                        r = synthesize_system_hostname_ptr(q, af, &address, &answer);
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                        if (r < 0)
eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering                                return log_error_errno(r, "Failed to synthesize system hostname PTR RR: %m");
0d2cd47617b423f37d7425be7a56ae2fca8ff9f6Lennart Poettering
0d2cd47617b423f37d7425be7a56ae2fca8ff9f6Lennart Poettering                        r = synthesize_gateway_ptr(q, af, &address, &answer);
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                return log_error_errno(r, "Failed to synthesize gateway hostname PTR RR: %m");
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                }
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen        }
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        if (!answer)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return 0;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        dns_answer_unref(q->answer);
40a1eebde6be7ac3f1885147fc24e06ad1da260cDavid Herrmann        q->answer = answer;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        answer = NULL;
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        q->answer_family = SYNTHESIZE_FAMILY(q->flags);
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        q->answer_protocol = SYNTHESIZE_PROTOCOL(q->flags);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        q->answer_rcode = DNS_RCODE_SUCCESS;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        *state = DNS_TRANSACTION_SUCCESS;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 1;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poetteringint dns_query_go(DnsQuery *q) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        DnsScopeMatch found = DNS_SCOPE_NO;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        DnsScope *s, *first = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        DnsTransaction *t;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        const char *name;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        Iterator i;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        int r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(q);
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (q->state != DNS_TRANSACTION_NULL)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(q->question);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(q->question->n_keys > 0);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        name = DNS_RESOURCE_KEY_NAME(q->question->keys[0]);
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        LIST_FOREACH(scopes, s, q->manager->dns_scopes) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                DnsScopeMatch match;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                match = dns_scope_good_domain(s, q->ifindex, q->flags, name);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (match < 0)
a38d99451f2bf8026ec51aee91662292e823c6a8Lennart Poettering                        return match;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                if (match == DNS_SCOPE_NO)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        continue;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                found = match;
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                if (match == DNS_SCOPE_YES) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        first = s;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        break;
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                } else {
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                        assert(match == DNS_SCOPE_MAYBE);
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                        if (!first)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                first = s;
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                }
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        }
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering        if (found == DNS_SCOPE_NO) {
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                DnsTransactionState state = DNS_TRANSACTION_NO_SERVERS;
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering                dns_query_synthesize_reply(q, &state);
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                dns_query_complete(q, state);
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering                return 1;
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering        }
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        r = dns_query_add_transaction_split(q, first);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
2a1288ff89322a2f49c79f6d1832c8164c14a05cLennart Poettering                goto fail;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        LIST_FOREACH(scopes, s, first->scopes_next) {
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                DnsScopeMatch match;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                match = dns_scope_good_domain(s, q->ifindex, q->flags, name);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (match < 0)
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                        goto fail;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (match != found)
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering                        continue;
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering                r = dns_query_add_transaction_split(q, s);
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                if (r < 0)
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                        goto fail;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        q->answer = dns_answer_unref(q->answer);
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        q->answer_rcode = 0;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        q->answer_family = AF_UNSPEC;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        q->answer_protocol = _DNS_PROTOCOL_INVALID;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        r = sd_event_add_time(
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                        q->manager->event,
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        &q->timeout_event_source,
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                        clock_boottime_or_monotonic(),
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        now(clock_boottime_or_monotonic()) + QUERY_TIMEOUT_USEC, 0,
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                        on_query_timeout, q);
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        if (r < 0)
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                goto fail;
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering        q->state = DNS_TRANSACTION_PENDING;
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering        q->block_ready++;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        /* Start the transactions that are not started yet */
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        SET_FOREACH(t, q->transactions, i) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (t->state != DNS_TRANSACTION_NULL)
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering                        continue;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                r = dns_transaction_go(t);
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                if (r < 0)
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                        goto fail;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering        q->block_ready--;
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering        dns_query_ready(q);
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering        return 1;
a5f035960006556beab51c42e6948985635e261aLennart Poettering
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poetteringfail:
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering        dns_query_stop(q);
86ad4cd709ced8daf2b75ab564dece1ce82ffed9Tom Gundersen        return r;
86ad4cd709ced8daf2b75ab564dece1ce82ffed9Tom Gundersen}
86ad4cd709ced8daf2b75ab564dece1ce82ffed9Tom Gundersen
86ad4cd709ced8daf2b75ab564dece1ce82ffed9Tom Gundersenvoid dns_query_ready(DnsQuery *q) {
86ad4cd709ced8daf2b75ab564dece1ce82ffed9Tom Gundersen        DnsTransaction *t;
86ad4cd709ced8daf2b75ab564dece1ce82ffed9Tom Gundersen        DnsTransactionState state = DNS_TRANSACTION_NO_SERVERS;
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering        _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        int rcode = 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        DnsScope *scope = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        bool pending = false;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        Iterator i;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(q);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(IN_SET(q->state, DNS_TRANSACTION_NULL, DNS_TRANSACTION_PENDING));
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        /* Note that this call might invalidate the query. Callers
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering         * should hence not attempt to access the query or transaction
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering         * after calling this function, unless the block_ready
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering         * counter was explicitly bumped before doing so. */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (q->block_ready > 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        SET_FOREACH(t, q->transactions, i) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                /* If we found a successful answer, ignore all answers from other scopes */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (state == DNS_TRANSACTION_SUCCESS && t->scope != scope)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        continue;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                /* One of the transactions is still going on, let's maybe wait for it */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (IN_SET(t->state, DNS_TRANSACTION_PENDING, DNS_TRANSACTION_NULL)) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        pending = true;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        continue;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                /* One of the transactions is successful, let's use
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                 * it, and copy its data out */
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                if (t->state == DNS_TRANSACTION_SUCCESS) {
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                        DnsAnswer *a;
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                        if (t->received) {
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                                rcode = DNS_PACKET_RCODE(t->received);
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                                a = t->received->answer;
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                        } else {
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                                rcode = t->cached_rcode;
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                                a = t->cached;
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                        }
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                        if (state == DNS_TRANSACTION_SUCCESS) {
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                                DnsAnswer *merged;
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                                merged = dns_answer_merge(answer, a);
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                                if (!merged) {
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                                        dns_query_complete(q, DNS_TRANSACTION_RESOURCES);
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                                        return;
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                                }
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                                dns_answer_unref(answer);
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                                answer = merged;
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                        } else {
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                                dns_answer_unref(answer);
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                                answer = dns_answer_ref(a);
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                        }
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen
deb3f3d335d64601bb2d8a7520d8303f99d8a071Lennart Poettering                        scope = t->scope;
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                        state = DNS_TRANSACTION_SUCCESS;
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                        continue;
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                }
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                /* One of the transactions has failed, let's see
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                 * whether we find anything better, but if not, return
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                 * its response data */
72290734be81e83e6ef9520c07692f68095eb5b2Tom Gundersen                if (state != DNS_TRANSACTION_SUCCESS && t->state == DNS_TRANSACTION_FAILURE) {
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering                        DnsAnswer *a;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        if (t->received) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                rcode = DNS_PACKET_RCODE(t->received);
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                                a = t->received->answer;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                        } else {
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                                rcode = t->cached_rcode;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                                a = t->cached;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        dns_answer_unref(answer);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        answer = dns_answer_ref(a);
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                        scope = t->scope;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                        state = DNS_TRANSACTION_FAILURE;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        continue;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (state == DNS_TRANSACTION_NO_SERVERS && t->state != DNS_TRANSACTION_NO_SERVERS)
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                        state = t->state;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        }
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen        if (pending) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                /* If so far we weren't successful, and there's
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                 * something still pending, then wait for it */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (state != DNS_TRANSACTION_SUCCESS)
091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen                        return;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                /* If we already were successful, then only wait for
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                 * other transactions on the same scope to finish. */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                SET_FOREACH(t, q->transactions, i) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        if (t->scope == scope && IN_SET(t->state, DNS_TRANSACTION_PENDING, DNS_TRANSACTION_NULL))
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                return;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (IN_SET(state, DNS_TRANSACTION_SUCCESS, DNS_TRANSACTION_FAILURE)) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                q->answer = dns_answer_ref(answer);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                q->answer_rcode = rcode;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                q->answer_protocol = scope ? scope->protocol : _DNS_PROTOCOL_INVALID;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                q->answer_family = scope ? scope->family : AF_UNSPEC;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        /* Try to synthesize a reply if we couldn't resolve something. */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        dns_query_synthesize_reply(q, &state);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        dns_query_complete(q, state);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringint dns_query_cname_redirect(DnsQuery *q, const char *name) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        _cleanup_(dns_question_unrefp) DnsQuestion *nq = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        int r;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        assert(q);
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        if (q->n_cname_redirects > CNAME_MAX)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return -ELOOP;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = dns_question_cname_redirect(q->question, name, &nq);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                return r;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        dns_question_unref(q->question);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        q->question = nq;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        nq = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        q->n_cname_redirects++;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        dns_query_stop(q);
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        q->state = DNS_TRANSACTION_NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int on_bus_track(sd_bus_track *t, void *userdata) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        DnsQuery *q = userdata;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(t);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(q);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        log_debug("Client of active query vanished, aborting query.");
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        dns_query_complete(q, DNS_TRANSACTION_ABORTED);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 0;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringint dns_query_bus_track(DnsQuery *q, sd_bus_message *m) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        int r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(q);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(m);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (!q->bus_track) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                r = sd_bus_track_new(sd_bus_message_get_bus(m), &q->bus_track, on_bus_track, q);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = sd_bus_track_add_sender(q->bus_track, m);
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering        if (r < 0)
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering                return r;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering        return 0;
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering}
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering