124 lines
3.9 KiB
C
124 lines
3.9 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2014 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "in-addr-util.h"
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typedef struct DnsServer DnsServer;
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typedef enum DnsServerType {
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DNS_SERVER_SYSTEM,
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DNS_SERVER_FALLBACK,
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DNS_SERVER_LINK,
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} DnsServerType;
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typedef enum DnsServerFeatureLevel {
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DNS_SERVER_FEATURE_LEVEL_TCP,
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DNS_SERVER_FEATURE_LEVEL_UDP,
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DNS_SERVER_FEATURE_LEVEL_EDNS0,
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DNS_SERVER_FEATURE_LEVEL_DO,
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DNS_SERVER_FEATURE_LEVEL_LARGE,
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_DNS_SERVER_FEATURE_LEVEL_MAX,
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_DNS_SERVER_FEATURE_LEVEL_INVALID = -1
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} DnsServerFeatureLevel;
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#define DNS_SERVER_FEATURE_LEVEL_WORST 0
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#define DNS_SERVER_FEATURE_LEVEL_BEST (_DNS_SERVER_FEATURE_LEVEL_MAX - 1)
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const char* dns_server_feature_level_to_string(int i) _const_;
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int dns_server_feature_level_from_string(const char *s) _pure_;
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#include "resolved-link.h"
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#include "resolved-manager.h"
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struct DnsServer {
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Manager *manager;
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unsigned n_ref;
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DnsServerType type;
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Link *link;
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int family;
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union in_addr_union address;
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usec_t resend_timeout;
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usec_t max_rtt;
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DnsServerFeatureLevel verified_features;
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DnsServerFeatureLevel possible_features;
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size_t received_udp_packet_max;
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unsigned n_failed_attempts;
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usec_t verified_usec;
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usec_t features_grace_period_usec;
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/* Indicates whether responses are augmented with RRSIG by
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* server or not. Note that this is orthogonal to the feature
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* level stuff, as it's only information describing responses,
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* and has no effect on how the questions are asked. */
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bool rrsig_missing:1;
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/* Used when GC'ing old DNS servers when configuration changes. */
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bool marked:1;
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/* If linked is set, then this server appears in the servers linked list */
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bool linked:1;
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LIST_FIELDS(DnsServer, servers);
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};
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int dns_server_new(
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Manager *m,
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DnsServer **ret,
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DnsServerType type,
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Link *link,
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int family,
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const union in_addr_union *address);
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DnsServer* dns_server_ref(DnsServer *s);
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DnsServer* dns_server_unref(DnsServer *s);
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void dns_server_unlink(DnsServer *s);
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void dns_server_move_back_and_unmark(DnsServer *s);
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void dns_server_packet_received(DnsServer *s, DnsServerFeatureLevel features, usec_t rtt, size_t size);
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void dns_server_packet_lost(DnsServer *s, DnsServerFeatureLevel features, usec_t usec);
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void dns_server_packet_failed(DnsServer *s, DnsServerFeatureLevel features);
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void dns_server_packet_rrsig_missing(DnsServer *s);
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DnsServer *dns_server_find(DnsServer *first, int family, const union in_addr_union *in_addr);
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void dns_server_unlink_all(DnsServer *first);
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void dns_server_unlink_marked(DnsServer *first);
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void dns_server_mark_all(DnsServer *first);
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DnsServer *manager_get_first_dns_server(Manager *m, DnsServerType t);
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DnsServer *manager_set_dns_server(Manager *m, DnsServer *s);
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DnsServer *manager_get_dns_server(Manager *m);
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void manager_next_dns_server(Manager *m);
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DEFINE_TRIVIAL_CLEANUP_FUNC(DnsServer*, dns_server_unref);
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DnsServerFeatureLevel dns_server_possible_features(DnsServer *s);
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extern const struct hash_ops dns_server_hash_ops;
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