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-rw-r--r--src/grp-resolve/systemd-resolved/resolved-dns-query.h133
1 files changed, 133 insertions, 0 deletions
diff --git a/src/grp-resolve/systemd-resolved/resolved-dns-query.h b/src/grp-resolve/systemd-resolved/resolved-dns-query.h
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+++ b/src/grp-resolve/systemd-resolved/resolved-dns-query.h
@@ -0,0 +1,133 @@
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2014 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+
+#include <systemd/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;
+
+ 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 */
+
+ /* 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;
+
+ /* 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);