1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 This file is part of systemd.
7 Copyright 2014 Lennart Poettering
15 typedef struct DnsQueryCandidate DnsQueryCandidate
;
16 typedef struct DnsQuery DnsQuery
;
18 #include "resolved-dns-answer.h"
19 #include "resolved-dns-question.h"
20 #include "resolved-dns-stream.h"
21 #include "resolved-dns-search-domain.h"
23 struct DnsQueryCandidate
{
27 DnsSearchDomain
*search_domain
;
32 LIST_FIELDS(DnsQueryCandidate
, candidates_by_query
);
33 LIST_FIELDS(DnsQueryCandidate
, candidates_by_scope
);
39 /* When resolving a service, we first create a TXT+SRV query,
40 * and then for the hostnames we discover auxiliary A+AAAA
41 * queries. This pointer always points from the auxiliary
42 * queries back to the TXT+SRV query. */
43 DnsQuery
*auxiliary_for
;
44 LIST_HEAD(DnsQuery
, auxiliary_queries
);
45 unsigned n_auxiliary_queries
;
48 /* The question, formatted in IDNA for use on classic DNS, and as UTF8 for use in LLMNR or mDNS. Note that even
49 * on classic DNS some labels might use UTF8 encoding. Specifically, DNS-SD service names (in contrast to their
50 * domain suffixes) use UTF-8 encoding even on DNS. Thus, the difference between these two fields is mostly
51 * relevant only for explicit *hostname* lookups as well as the domain suffixes of service lookups. */
52 DnsQuestion
*question_idna
;
53 DnsQuestion
*question_utf8
;
58 /* If true, A or AAAA RR lookups will be suppressed on links with no routable address of the matching address
60 bool suppress_unroutable_family
;
62 /* If true, the RR TTLs of the answer will be clamped by their current left validity in the cache */
65 DnsTransactionState state
;
66 unsigned n_cname_redirects
;
68 LIST_HEAD(DnsQueryCandidate
, candidates
);
69 sd_event_source
*timeout_event_source
;
74 DnssecResult answer_dnssec_result
;
75 bool answer_authenticated
;
76 DnsProtocol answer_protocol
;
78 DnsSearchDomain
*answer_search_domain
;
79 int answer_errno
; /* if state is DNS_TRANSACTION_ERRNO */
80 bool previous_redirect_unauthenticated
;
82 /* Bus client information */
83 sd_bus_message
*request
;
85 bool request_address_valid
;
86 union in_addr_union request_address
;
87 unsigned block_all_complete
;
88 char *request_address_string
;
90 /* DNS stub information */
91 DnsPacket
*request_dns_packet
;
92 DnsStream
*request_dns_stream
;
93 DnsPacket
*reply_dns_packet
;
95 /* Completion callback */
96 void (*complete
)(DnsQuery
* q
);
99 sd_bus_track
*bus_track
;
101 LIST_FIELDS(DnsQuery
, queries
);
102 LIST_FIELDS(DnsQuery
, auxiliary_queries
);
111 DnsQueryCandidate
* dns_query_candidate_free(DnsQueryCandidate
*c
);
112 void dns_query_candidate_notify(DnsQueryCandidate
*c
);
114 int dns_query_new(Manager
*m
, DnsQuery
**q
, DnsQuestion
*question_utf8
, DnsQuestion
*question_idna
, int family
, uint64_t flags
);
115 DnsQuery
*dns_query_free(DnsQuery
*q
);
117 int dns_query_make_auxiliary(DnsQuery
*q
, DnsQuery
*auxiliary_for
);
119 int dns_query_go(DnsQuery
*q
);
120 void dns_query_ready(DnsQuery
*q
);
122 int dns_query_process_cname(DnsQuery
*q
);
124 int dns_query_bus_track(DnsQuery
*q
, sd_bus_message
*m
);
126 DnsQuestion
* dns_query_question_for_protocol(DnsQuery
*q
, DnsProtocol protocol
);
128 const char *dns_query_string(DnsQuery
*q
);
130 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsQuery
*, dns_query_free
);
132 bool dns_query_fully_authenticated(DnsQuery
*q
);