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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#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 <inttypes.h>
#include "sd-bus.h"
#include "util.h"
#include "set.h"
typedef struct DnsQuery DnsQuery;
typedef struct DnsQueryTransaction DnsQueryTransaction;
#include "resolved.h"
#include "resolved-dns-scope.h"
#include "resolved-dns-rr.h"
#include "resolved-dns-packet.h"
#include "resolved-dns-question.h"
#include "resolved-dns-answer.h"
#include "resolved-dns-stream.h"
typedef enum DnsQueryState {
DNS_QUERY_NULL,
DNS_QUERY_PENDING,
DNS_QUERY_FAILURE,
DNS_QUERY_SUCCESS,
DNS_QUERY_NO_SERVERS,
DNS_QUERY_TIMEOUT,
DNS_QUERY_ATTEMPTS_MAX,
DNS_QUERY_INVALID_REPLY,
DNS_QUERY_RESOURCES,
DNS_QUERY_ABORTED,
_DNS_QUERY_STATE_MAX,
_DNS_QUERY_STATE_INVALID = -1
} DnsQueryState;
struct DnsQueryTransaction {
DnsScope *scope;
DnsQuestion *question;
DnsQueryState state;
uint16_t id;
DnsPacket *sent, *received;
DnsAnswer *cached;
int cached_rcode;
sd_event_source *timeout_event_source;
unsigned n_attempts;
/* TCP connection logic, if we need it */
DnsStream *stream;
/* Queries this transaction is referenced by and that shall by
* notified about this specific transaction completing. */
Set *queries;
unsigned block_gc;
LIST_FIELDS(DnsQueryTransaction, transactions_by_scope);
};
struct DnsQuery {
Manager *manager;
DnsQuestion *question;
DnsQueryState state;
unsigned n_cname_redirects;
sd_event_source *timeout_event_source;
/* Discovered data */
DnsAnswer *answer;
int answer_ifindex;
int answer_rcode;
/* Bus client information */
sd_bus_message *request;
int request_family;
const char *request_hostname;
union in_addr_union request_address;
/* Completion callback */
void (*complete)(DnsQuery* q);
unsigned block_ready;
Set *transactions;
LIST_FIELDS(DnsQuery, queries);
};
DnsQueryTransaction* dns_query_transaction_free(DnsQueryTransaction *t);
void dns_query_transaction_complete(DnsQueryTransaction *t, DnsQueryState state);
void dns_query_transaction_process_reply(DnsQueryTransaction *t, DnsPacket *p);
int dns_query_new(Manager *m, DnsQuery **q, DnsQuestion *question);
DnsQuery *dns_query_free(DnsQuery *q);
int dns_query_go(DnsQuery *q);
void dns_query_ready(DnsQuery *q);
int dns_query_cname_redirect(DnsQuery *q, const char *name);
const char* dns_query_state_to_string(DnsQueryState p) _const_;
DnsQueryState dns_query_state_from_string(const char *s) _pure_;
DEFINE_TRIVIAL_CLEANUP_FUNC(DnsQuery*, dns_query_free);
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