128 lines
4.0 KiB
C
128 lines
4.0 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
|
|
#pragma once
|
|
|
|
#include "sd-bus.h"
|
|
|
|
#include "set.h"
|
|
#include "varlink.h"
|
|
|
|
typedef struct DnsQueryCandidate DnsQueryCandidate;
|
|
typedef struct DnsQuery DnsQuery;
|
|
typedef struct DnsStubListenerExtra DnsStubListenerExtra;
|
|
|
|
#include "resolved-dns-answer.h"
|
|
#include "resolved-dns-question.h"
|
|
#include "resolved-dns-search-domain.h"
|
|
#include "resolved-dns-transaction.h"
|
|
|
|
struct DnsQueryCandidate {
|
|
DnsQuery *query;
|
|
DnsScope *scope;
|
|
|
|
DnsSearchDomain *search_domain;
|
|
|
|
int error_code;
|
|
Set *transactions;
|
|
|
|
LIST_FIELDS(DnsQueryCandidate, candidates_by_query);
|
|
LIST_FIELDS(DnsQueryCandidate, candidates_by_scope);
|
|
};
|
|
|
|
struct DnsQuery {
|
|
Manager *manager;
|
|
|
|
/* When resolving a service, we first create a TXT+SRV query,
|
|
* and then for the hostnames we discover auxiliary A+AAAA
|
|
* queries. This pointer always points from the auxiliary
|
|
* queries back to the TXT+SRV query. */
|
|
DnsQuery *auxiliary_for;
|
|
LIST_HEAD(DnsQuery, auxiliary_queries);
|
|
unsigned n_auxiliary_queries;
|
|
int auxiliary_result;
|
|
|
|
/* The question, formatted in IDNA for use on classic DNS, and as UTF8 for use in LLMNR or mDNS. Note that even
|
|
* on classic DNS some labels might use UTF8 encoding. Specifically, DNS-SD service names (in contrast to their
|
|
* domain suffixes) use UTF-8 encoding even on DNS. Thus, the difference between these two fields is mostly
|
|
* relevant only for explicit *hostname* lookups as well as the domain suffixes of service lookups. */
|
|
DnsQuestion *question_idna;
|
|
DnsQuestion *question_utf8;
|
|
|
|
uint64_t flags;
|
|
int ifindex;
|
|
|
|
/* If true, the RR TTLs of the answer will be clamped by their current left validity in the cache */
|
|
bool clamp_ttl;
|
|
|
|
DnsTransactionState state;
|
|
unsigned n_cname_redirects;
|
|
|
|
LIST_HEAD(DnsQueryCandidate, candidates);
|
|
sd_event_source *timeout_event_source;
|
|
|
|
/* Discovered data */
|
|
DnsAnswer *answer;
|
|
int answer_rcode;
|
|
DnssecResult answer_dnssec_result;
|
|
bool answer_authenticated;
|
|
DnsProtocol answer_protocol;
|
|
int answer_family;
|
|
DnsSearchDomain *answer_search_domain;
|
|
int answer_errno; /* if state is DNS_TRANSACTION_ERRNO */
|
|
bool previous_redirect_unauthenticated;
|
|
|
|
/* Bus + Varlink client information */
|
|
sd_bus_message *bus_request;
|
|
Varlink *varlink_request;
|
|
int request_family;
|
|
bool request_address_valid;
|
|
union in_addr_union request_address;
|
|
unsigned block_all_complete;
|
|
char *request_address_string;
|
|
|
|
/* DNS stub information */
|
|
DnsPacket *request_dns_packet;
|
|
DnsStream *request_dns_stream;
|
|
DnsPacket *reply_dns_packet;
|
|
DnsStubListenerExtra *stub_listener_extra;
|
|
|
|
/* Completion callback */
|
|
void (*complete)(DnsQuery* q);
|
|
unsigned block_ready;
|
|
|
|
sd_bus_track *bus_track;
|
|
|
|
LIST_FIELDS(DnsQuery, queries);
|
|
LIST_FIELDS(DnsQuery, auxiliary_queries);
|
|
};
|
|
|
|
enum {
|
|
DNS_QUERY_MATCH,
|
|
DNS_QUERY_NOMATCH,
|
|
DNS_QUERY_RESTARTED,
|
|
};
|
|
|
|
DnsQueryCandidate* dns_query_candidate_free(DnsQueryCandidate *c);
|
|
DEFINE_TRIVIAL_CLEANUP_FUNC(DnsQueryCandidate*, dns_query_candidate_free);
|
|
|
|
void dns_query_candidate_notify(DnsQueryCandidate *c);
|
|
|
|
int dns_query_new(Manager *m, DnsQuery **q, DnsQuestion *question_utf8, DnsQuestion *question_idna, int family, uint64_t flags);
|
|
DnsQuery *dns_query_free(DnsQuery *q);
|
|
|
|
int dns_query_make_auxiliary(DnsQuery *q, DnsQuery *auxiliary_for);
|
|
|
|
int dns_query_go(DnsQuery *q);
|
|
void dns_query_ready(DnsQuery *q);
|
|
|
|
int dns_query_process_cname(DnsQuery *q);
|
|
|
|
void dns_query_complete(DnsQuery *q, DnsTransactionState state);
|
|
|
|
DnsQuestion* dns_query_question_for_protocol(DnsQuery *q, DnsProtocol protocol);
|
|
|
|
const char *dns_query_string(DnsQuery *q);
|
|
|
|
DEFINE_TRIVIAL_CLEANUP_FUNC(DnsQuery*, dns_query_free);
|
|
|
|
bool dns_query_fully_authenticated(DnsQuery *q);
|