1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2014 Lennart Poettering
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.
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.
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/>.
30 typedef struct DnsQuery DnsQuery;
31 typedef struct DnsQueryTransaction DnsQueryTransaction;
34 #include "resolved-dns-scope.h"
35 #include "resolved-dns-rr.h"
36 #include "resolved-dns-packet.h"
37 #include "resolved-dns-question.h"
38 #include "resolved-dns-answer.h"
40 typedef enum DnsQueryState {
47 DNS_QUERY_ATTEMPTS_MAX,
48 DNS_QUERY_INVALID_REPLY,
53 struct DnsQueryTransaction {
56 DnsQuestion *question;
61 DnsPacket *sent, *received;
65 sd_event_source *timeout_event_source;
68 /* TCP connection logic */
70 sd_event_source *tcp_event_source;
71 size_t tcp_written, tcp_read;
74 /* Queries this transaction is referenced by and that shall by
75 * notified about this specific transaction completing. */
80 LIST_FIELDS(DnsQueryTransaction, transactions_by_scope);
85 DnsQuestion *question;
88 unsigned n_cname_redirects;
90 sd_event_source *timeout_event_source;
98 /* Bus client information */
99 sd_bus_message *request;
101 const char *request_hostname;
102 union in_addr_union request_address;
104 /* Completion callback */
105 void (*complete)(DnsQuery* q);
106 unsigned block_ready;
110 LIST_FIELDS(DnsQuery, queries);
113 DnsQueryTransaction* dns_query_transaction_free(DnsQueryTransaction *t);
114 void dns_query_transaction_complete(DnsQueryTransaction *t, DnsQueryState state);
116 void dns_query_transaction_process_reply(DnsQueryTransaction *t, DnsPacket *p);
118 int dns_query_new(Manager *m, DnsQuery **q, DnsQuestion *question);
119 DnsQuery *dns_query_free(DnsQuery *q);
121 int dns_query_go(DnsQuery *q);
122 void dns_query_ready(DnsQuery *q);
124 int dns_query_cname_redirect(DnsQuery *q, const char *name);
126 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsQuery*, dns_query_free);