ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering This file is part of systemd.
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering Copyright 2014 Lennart Poettering
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering systemd is free software; you can redistribute it and/or modify it
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering under the terms of the GNU Lesser General Public License as published by
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering the Free Software Foundation; either version 2.1 of the License, or
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering (at your option) any later version.
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering systemd is distributed in the hope that it will be useful, but
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering WITHOUT ANY WARRANTY; without even the implied warranty of
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering Lesser General Public License for more details.
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering You should have received a copy of the GNU Lesser General Public License
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering along with systemd; If not, see <http://www.gnu.org/licenses/>.
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poetteringtypedef struct DnsTransaction DnsTransaction;
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poetteringtypedef enum DnsTransactionState DnsTransactionState;
c3bc53e62459d7e566ffffeade41cd82bc6754f5Lennart Poetteringtypedef enum DnsTransactionSource DnsTransactionSource;
0791110fbee9d7dfcabd6e338c290e90aeb79644Lennart Poettering DNS_TRANSACTION_NOT_FOUND, /* like NXDOMAIN, but when LLMNR/TCP connections fail */
547973dea7abd6c124ff6c79fe2bbe322a7314aeLennart Poettering#define DNS_TRANSACTION_IS_LIVE(state) IN_SET((state), DNS_TRANSACTION_NULL, DNS_TRANSACTION_PENDING, DNS_TRANSACTION_VALIDATING)
71d35b6b5563817dfbe757ab9e3b9f018b2db491Thomas Hindoe Paaboel Andersen#include "resolved-dns-answer.h"
71d35b6b5563817dfbe757ab9e3b9f018b2db491Thomas Hindoe Paaboel Andersen#include "resolved-dns-scope.h"
7cc6ed7ba6c667caef9a92ba4d59e1ecdc3af8ffLennart Poettering int answer_errno; /* if state is DNS_TRANSACTION_ERRNO */
105e151299dc1208855380be2b22d0db2d66ebc6Lennart Poettering /* Indicates whether the primary answer is authenticated,
105e151299dc1208855380be2b22d0db2d66ebc6Lennart Poettering * i.e. whether the RRs from answer which directly match the
105e151299dc1208855380be2b22d0db2d66ebc6Lennart Poettering * question are authenticated, or, if there are none, whether
105e151299dc1208855380be2b22d0db2d66ebc6Lennart Poettering * the NODATA or NXDOMAIN case is. It says nothing about
105e151299dc1208855380be2b22d0db2d66ebc6Lennart Poettering * additional RRs listed in the answer, however they have
105e151299dc1208855380be2b22d0db2d66ebc6Lennart Poettering * their own DNS_ANSWER_AUTHORIZED FLAGS. Note that this bit
105e151299dc1208855380be2b22d0db2d66ebc6Lennart Poettering * is defined different than the AD bit in DNS packets, as
105e151299dc1208855380be2b22d0db2d66ebc6Lennart Poettering * that covers more than just the actual primary answer. */
105e151299dc1208855380be2b22d0db2d66ebc6Lennart Poettering /* Contains DNSKEY, DS, SOA RRs we already verified and need
105e151299dc1208855380be2b22d0db2d66ebc6Lennart Poettering * to authenticate this reply */
f32f0e57ca117455fb24ca72238c4958cd800b28Lennart Poettering /* UDP connection logic, if we need it */
f32f0e57ca117455fb24ca72238c4958cd800b28Lennart Poettering /* TCP connection logic, if we need it */
4667e00a61c2f60922558bc5e33ac9d3073a482cLennart Poettering /* The active server */
547973dea7abd6c124ff6c79fe2bbe322a7314aeLennart Poettering /* The features of the DNS server at time of transaction start */
274b874830b93e6592f190608866133384066a35Lennart Poettering DnsServerFeatureLevel current_feature_level;
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering /* Query candidates this transaction is referenced by and that
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering * shall be notified about this specific transaction
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering * completing. */
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering /* Zone items this transaction is referenced by and that shall
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering * be notified about completion. */
547973dea7abd6c124ff6c79fe2bbe322a7314aeLennart Poettering /* Other transactions that this transactions is referenced by
547973dea7abd6c124ff6c79fe2bbe322a7314aeLennart Poettering * and that shall be notified about completion. This is used
547973dea7abd6c124ff6c79fe2bbe322a7314aeLennart Poettering * when transactions want to validate their RRsets, but need
547973dea7abd6c124ff6c79fe2bbe322a7314aeLennart Poettering * another DNSKEY or DS RR to do so. */
547973dea7abd6c124ff6c79fe2bbe322a7314aeLennart Poettering /* The opposite direction: the transactions this transaction
547973dea7abd6c124ff6c79fe2bbe322a7314aeLennart Poettering * created in order to request DNSKEY or DS RRs. */
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering LIST_FIELDS(DnsTransaction, transactions_by_scope);
f52e61da047d7fc74e83f12dbbf87e0cbcc51c73Lennart Poetteringint dns_transaction_new(DnsTransaction **ret, DnsScope *s, DnsResourceKey *key);
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart PoetteringDnsTransaction* dns_transaction_free(DnsTransaction *t);
51e399bcebefb27d6b147d90de84d07f010fa170Lennart Poetteringbool dns_transaction_gc(DnsTransaction *t);
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poetteringint dns_transaction_go(DnsTransaction *t);
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poetteringvoid dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p);
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poetteringvoid dns_transaction_complete(DnsTransaction *t, DnsTransactionState state);
547973dea7abd6c124ff6c79fe2bbe322a7314aeLennart Poetteringvoid dns_transaction_notify(DnsTransaction *t, DnsTransaction *source);
547973dea7abd6c124ff6c79fe2bbe322a7314aeLennart Poetteringint dns_transaction_validate_dnssec(DnsTransaction *t);
547973dea7abd6c124ff6c79fe2bbe322a7314aeLennart Poetteringint dns_transaction_request_dnssec_keys(DnsTransaction *t);
a5784c498598348354543b23b13ee8639a8b9e35Lennart Poetteringconst char *dns_transaction_key_string(DnsTransaction *t);
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poetteringconst char* dns_transaction_state_to_string(DnsTransactionState p) _const_;
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart PoetteringDnsTransactionState dns_transaction_state_from_string(const char *s) _pure_;
c3bc53e62459d7e566ffffeade41cd82bc6754f5Lennart Poetteringconst char* dns_transaction_source_to_string(DnsTransactionSource p) _const_;
c3bc53e62459d7e566ffffeade41cd82bc6754f5Lennart PoetteringDnsTransactionSource dns_transaction_source_from_string(const char *s) _pure_;
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering/* LLMNR Jitter interval, see RFC 4795 Section 7 */
6e0684729420912df019cc64d3f8a3c8290cc5f1Lennart Poettering#define LLMNR_JITTER_INTERVAL_USEC (100 * USEC_PER_MSEC)
ea12bcc78911fd3531955a799dbf6c5ac33bf567Daniel Mack/* mDNS Jitter interval, see RFC 6762 Section 5.2 */
ea12bcc78911fd3531955a799dbf6c5ac33bf567Daniel Mack#define MDNS_JITTER_MIN_USEC (20 * USEC_PER_MSEC)
ea12bcc78911fd3531955a799dbf6c5ac33bf567Daniel Mack#define MDNS_JITTER_RANGE_USEC (100 * USEC_PER_MSEC)
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering/* Maximum attempts to send DNS requests, across all DNS servers */
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering/* Maximum attempts to send LLMNR requests, see RFC 4795 Section 2.7 */