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-rw-r--r--src/resolve/resolved-dns-query.h125
1 files changed, 125 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-query.h b/src/resolve/resolved-dns-query.h
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+/* SPDX-License-Identifier: LGPL-2.1+ */
+#pragma once
+
+#include "sd-bus.h"
+
+#include "set.h"
+
+typedef struct DnsQueryCandidate DnsQueryCandidate;
+typedef struct DnsQuery DnsQuery;
+
+#include "resolved-dns-answer.h"
+#include "resolved-dns-question.h"
+#include "resolved-dns-stream.h"
+#include "resolved-dns-search-domain.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, A or AAAA RR lookups will be suppressed on links with no routable address of the matching address
+ * family */
+ bool suppress_unroutable_family;
+
+ /* 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 client information */
+ sd_bus_message *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;
+
+ /* 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);
+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);
+
+int dns_query_bus_track(DnsQuery *q, sd_bus_message *m);
+
+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);