src/resolve/resolved-dns-query.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #pragma once
   4
   5 /***
   6   This file is part of systemd.
   7
   8   Copyright 2014 Lennart Poettering
   9
  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.
  14
  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.
  19
  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/>.
  22 ***/
  23
  24 #include <inttypes.h>
  25
  26 #include "sd-bus.h"
  27 #include "util.h"
  28
  29 typedef struct DnsQuery DnsQuery;
  30 typedef struct DnsQueryTransaction DnsQueryTransaction;
  31
  32 #include "resolved.h"
  33 #include "resolved-dns-scope.h"
  34 #include "resolved-dns-rr.h"
  35 #include "resolved-dns-packet.h"
  36
  37 typedef enum DnsQueryState {
  38         DNS_QUERY_NULL,
  39         DNS_QUERY_SENT,
  40         DNS_QUERY_FAILURE,
  41         DNS_QUERY_SUCCESS,
  42         DNS_QUERY_SKIPPED,
  43         DNS_QUERY_TIMEOUT,
  44         DNS_QUERY_ATTEMPTS_MAX,
  45         DNS_QUERY_INVALID_REPLY,
  46 } DnsQueryState;
  47
  48 struct DnsQueryTransaction {
  49         DnsQuery *query;
  50         DnsScope *scope;
  51
  52         DnsQueryState state;
  53         uint16_t id;
  54
  55         sd_event_source *timeout_event_source;
  56         unsigned n_attempts;
  57
  58         DnsPacket *packet;
  59
  60         LIST_FIELDS(DnsQueryTransaction, transactions_by_query);
  61         LIST_FIELDS(DnsQueryTransaction, transactions_by_scope);
  62 };
  63
  64 struct DnsQuery {
  65         Manager *manager;
  66
  67         DnsResourceKey *keys;
  68         unsigned n_keys;
  69
  70         DnsQueryState state;
  71
  72         sd_event_source *timeout_event_source;
  73
  74         uint16_t rcode;
  75         DnsPacket *packet;
  76
  77         sd_bus_message *request;
  78         unsigned char request_family;
  79         const char *request_hostname;
  80         union in_addr_union request_address;
  81
  82         void (*complete)(DnsQuery* q);
  83
  84         LIST_HEAD(DnsQueryTransaction, transactions);
  85         LIST_FIELDS(DnsQuery, queries);
  86 };
  87
  88 int dns_query_new(Manager *m, DnsQuery **q, DnsResourceKey *keys, unsigned n_keys);
  89 DnsQuery *dns_query_free(DnsQuery *q);
  90 int dns_query_start(DnsQuery *q);
  91 void dns_query_finish(DnsQuery *q);
  92
  93 DnsQueryTransaction* dns_query_transaction_free(DnsQueryTransaction *t);
  94 int dns_query_transaction_start(DnsQueryTransaction *t);
  95 int dns_query_transaction_reply(DnsQueryTransaction *t, DnsPacket *p);
  96
  97 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsQuery*, dns_query_free);