2014-07-22 21:48:41 +02:00
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2014 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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typedef struct DnsQuestion DnsQuestion;
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2015-12-02 20:43:11 +01:00
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#include "macro.h"
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2014-07-22 21:48:41 +02:00
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#include "resolved-dns-rr.h"
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2015-12-02 20:43:11 +01:00
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/* A simple array of resource keys */
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2014-07-22 21:48:41 +02:00
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struct DnsQuestion {
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unsigned n_ref;
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unsigned n_keys, n_allocated;
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DnsResourceKey* keys[0];
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};
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DnsQuestion *dns_question_new(unsigned n);
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DnsQuestion *dns_question_ref(DnsQuestion *q);
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DnsQuestion *dns_question_unref(DnsQuestion *q);
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resolved: add ResolveService() bus call for resolving SRV and DNS-SD services
This also adds client-side support for this to systemd-resolve-host.
Note that the ResolveService() API can deal both with DNS-SD service
(consisting of service name, type and domain), as well as classic SRV
services (consisting just of a type and a domain), all exposed in the
same call.
This patch also reworks CNAME handling in order to reuse it between
hostname, RR and service lookups.
In contrast to Avahi and Bonjour, this new API will actually reolve the
A/AAAA RRs the SRV RRs point to in one go (unless this is explicitly
disabled). This normally comes for free, as these RRs are sent along
the SRV responses anyway, hence let's make use of that. This makes the
API considerably easier to use, as a single ResolveService() invocation
will return all necessary data to pick a server and connect() to it.
Note that this only implements the DNS-SD resolving step, it does not
implement DNS-SD browsing, as that makes sense primarily on mDNS, due to
its continuous nature.
2015-11-23 21:25:40 +01:00
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int dns_question_new_address(DnsQuestion **ret, int family, const char *name);
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int dns_question_new_reverse(DnsQuestion **ret, int family, const union in_addr_union *a);
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int dns_question_new_service(DnsQuestion **ret, const char *name, bool with_txt);
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2014-07-22 21:48:41 +02:00
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int dns_question_add(DnsQuestion *q, DnsResourceKey *key);
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2015-11-25 20:47:27 +01:00
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int dns_question_matches_rr(DnsQuestion *q, DnsResourceRecord *rr, const char *search_domain);
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int dns_question_matches_cname(DnsQuestion *q, DnsResourceRecord *rr, const char* search_domain);
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2015-11-24 01:25:24 +01:00
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int dns_question_is_valid_for_query(DnsQuestion *q);
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2015-07-28 18:38:54 +02:00
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int dns_question_contains(DnsQuestion *a, DnsResourceKey *k);
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int dns_question_is_equal(DnsQuestion *a, DnsQuestion *b);
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2014-07-22 21:48:41 +02:00
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2015-09-04 01:56:23 +02:00
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int dns_question_cname_redirect(DnsQuestion *q, const DnsResourceRecord *cname, DnsQuestion **ret);
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2014-07-22 21:48:41 +02:00
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2015-11-24 01:25:24 +01:00
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const char *dns_question_first_name(DnsQuestion *q);
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resolved: add ResolveService() bus call for resolving SRV and DNS-SD services
This also adds client-side support for this to systemd-resolve-host.
Note that the ResolveService() API can deal both with DNS-SD service
(consisting of service name, type and domain), as well as classic SRV
services (consisting just of a type and a domain), all exposed in the
same call.
This patch also reworks CNAME handling in order to reuse it between
hostname, RR and service lookups.
In contrast to Avahi and Bonjour, this new API will actually reolve the
A/AAAA RRs the SRV RRs point to in one go (unless this is explicitly
disabled). This normally comes for free, as these RRs are sent along
the SRV responses anyway, hence let's make use of that. This makes the
API considerably easier to use, as a single ResolveService() invocation
will return all necessary data to pick a server and connect() to it.
Note that this only implements the DNS-SD resolving step, it does not
implement DNS-SD browsing, as that makes sense primarily on mDNS, due to
its continuous nature.
2015-11-23 21:25:40 +01:00
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2014-07-22 21:48:41 +02:00
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DEFINE_TRIVIAL_CLEANUP_FUNC(DnsQuestion*, dns_question_unref);
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2015-11-25 20:47:27 +01:00
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2015-12-02 20:43:11 +01:00
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#define _DNS_QUESTION_FOREACH(u, key, q) \
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for (unsigned UNIQ_T(i, u) = ({ \
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2015-11-25 20:47:27 +01:00
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(key) = ((q) && (q)->n_keys > 0) ? (q)->keys[0] : NULL; \
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0; \
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}); \
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2015-12-02 20:43:11 +01:00
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(q) && (UNIQ_T(i, u) < (q)->n_keys); \
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UNIQ_T(i, u)++, (key) = (UNIQ_T(i, u) < (q)->n_keys ? (q)->keys[UNIQ_T(i, u)] : NULL))
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#define DNS_QUESTION_FOREACH(key, q) _DNS_QUESTION_FOREACH(UNIQ, key, q)
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