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resolved: cache stringified transaction key once per transaction
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1/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3#pragma once
4
5/***
6 This file is part of systemd.
7
8 Copyright 2014 Lennart Poettering
9
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
14
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
19
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22***/
23
24
25#include "sd-bus.h"
26
27#include "set.h"
28
29typedef struct DnsQueryCandidate DnsQueryCandidate;
30typedef struct DnsQuery DnsQuery;
31
32#include "resolved-dns-answer.h"
33#include "resolved-dns-question.h"
34#include "resolved-dns-stream.h"
35#include "resolved-dns-search-domain.h"
36
37struct DnsQueryCandidate {
38 DnsQuery *query;
39 DnsScope *scope;
40
41 DnsSearchDomain *search_domain;
42
43 int error_code;
44 Set *transactions;
45
46 LIST_FIELDS(DnsQueryCandidate, candidates_by_query);
47 LIST_FIELDS(DnsQueryCandidate, candidates_by_scope);
48};
49
50struct DnsQuery {
51 Manager *manager;
52
53 /* When resolving a service, we first create a TXT+SRV query,
54 * and then for the hostnames we discover auxiliary A+AAAA
55 * queries. This pointer always points from the auxiliary
56 * queries back to the TXT+SRV query. */
57 DnsQuery *auxiliary_for;
58 LIST_HEAD(DnsQuery, auxiliary_queries);
59 unsigned n_auxiliary_queries;
60 int auxiliary_result;
61
62 DnsQuestion *question;
63 uint64_t flags;
64 int ifindex;
65
66 DnsTransactionState state;
67 unsigned n_cname_redirects;
68
69 LIST_HEAD(DnsQueryCandidate, candidates);
70 sd_event_source *timeout_event_source;
71
72 /* Discovered data */
73 DnsAnswer *answer;
74 int answer_rcode;
75 DnsProtocol answer_protocol;
76 int answer_family;
77 DnsSearchDomain *answer_search_domain;
78 bool answer_authenticated;
79
80 /* Bus client information */
81 sd_bus_message *request;
82 int request_family;
83 bool request_address_valid;
84 union in_addr_union request_address;
85 unsigned block_all_complete;
86
87 /* Completion callback */
88 void (*complete)(DnsQuery* q);
89 unsigned block_ready;
90
91 sd_bus_track *bus_track;
92
93 LIST_FIELDS(DnsQuery, queries);
94 LIST_FIELDS(DnsQuery, auxiliary_queries);
95};
96
97DnsQueryCandidate* dns_query_candidate_free(DnsQueryCandidate *c);
98void dns_query_candidate_notify(DnsQueryCandidate *c);
99
100int dns_query_new(Manager *m, DnsQuery **q, DnsQuestion *question, int family, uint64_t flags);
101DnsQuery *dns_query_free(DnsQuery *q);
102
103int dns_query_make_auxiliary(DnsQuery *q, DnsQuery *auxiliary_for);
104
105int dns_query_go(DnsQuery *q);
106void dns_query_ready(DnsQuery *q);
107
108int dns_query_process_cname(DnsQuery *q);
109
110int dns_query_bus_track(DnsQuery *q, sd_bus_message *m);
111
112DEFINE_TRIVIAL_CLEANUP_FUNC(DnsQuery*, dns_query_free);