/*-*- 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 "in-addr-util.h" typedef struct DnsServer DnsServer; typedef enum DnsServerType { DNS_SERVER_SYSTEM, DNS_SERVER_FALLBACK, DNS_SERVER_LINK, } DnsServerType; #define _DNS_SERVER_TYPE_MAX (DNS_SERVER_LINK + 1) const char* dns_server_type_to_string(DnsServerType i) _const_; DnsServerType dns_server_type_from_string(const char *s) _pure_; typedef enum DnsServerFeatureLevel { DNS_SERVER_FEATURE_LEVEL_TCP, DNS_SERVER_FEATURE_LEVEL_UDP, DNS_SERVER_FEATURE_LEVEL_EDNS0, DNS_SERVER_FEATURE_LEVEL_DO, DNS_SERVER_FEATURE_LEVEL_LARGE, _DNS_SERVER_FEATURE_LEVEL_MAX, _DNS_SERVER_FEATURE_LEVEL_INVALID = -1 } DnsServerFeatureLevel; #define DNS_SERVER_FEATURE_LEVEL_WORST 0 #define DNS_SERVER_FEATURE_LEVEL_BEST (_DNS_SERVER_FEATURE_LEVEL_MAX - 1) const char* dns_server_feature_level_to_string(int i) _const_; int dns_server_feature_level_from_string(const char *s) _pure_; #include "resolved-link.h" #include "resolved-manager.h" struct DnsServer { Manager *manager; unsigned n_ref; DnsServerType type; Link *link; int family; union in_addr_union address; char *server_string; usec_t resend_timeout; usec_t max_rtt; DnsServerFeatureLevel verified_feature_level; DnsServerFeatureLevel possible_feature_level; size_t received_udp_packet_max; unsigned n_failed_udp; unsigned n_failed_tcp; bool packet_failed:1; bool packet_truncated:1; bool packet_bad_opt:1; bool packet_rrsig_missing:1; usec_t verified_usec; usec_t features_grace_period_usec; /* Whether we already warned about downgrading to non-DNSSEC mode for this server */ bool warned_downgrade:1; /* Used when GC'ing old DNS servers when configuration changes. */ bool marked:1; /* If linked is set, then this server appears in the servers linked list */ bool linked:1; LIST_FIELDS(DnsServer, servers); }; int dns_server_new( Manager *m, DnsServer **ret, DnsServerType type, Link *link, int family, const union in_addr_union *address); DnsServer* dns_server_ref(DnsServer *s); DnsServer* dns_server_unref(DnsServer *s); void dns_server_unlink(DnsServer *s); void dns_server_move_back_and_unmark(DnsServer *s); void dns_server_packet_received(DnsServer *s, int protocol, DnsServerFeatureLevel level, usec_t rtt, size_t size); void dns_server_packet_lost(DnsServer *s, int protocol, DnsServerFeatureLevel level, usec_t usec); void dns_server_packet_failed(DnsServer *s, DnsServerFeatureLevel level); void dns_server_packet_truncated(DnsServer *s, DnsServerFeatureLevel level); void dns_server_packet_rrsig_missing(DnsServer *s, DnsServerFeatureLevel level); void dns_server_packet_bad_opt(DnsServer *s, DnsServerFeatureLevel level); DnsServerFeatureLevel dns_server_possible_feature_level(DnsServer *s); int dns_server_adjust_opt(DnsServer *server, DnsPacket *packet, DnsServerFeatureLevel level); const char *dns_server_string(DnsServer *server); bool dns_server_dnssec_supported(DnsServer *server); void dns_server_warn_downgrade(DnsServer *server); DnsServer *dns_server_find(DnsServer *first, int family, const union in_addr_union *in_addr); void dns_server_unlink_all(DnsServer *first); void dns_server_unlink_marked(DnsServer *first); void dns_server_mark_all(DnsServer *first); DnsServer *manager_get_first_dns_server(Manager *m, DnsServerType t); DnsServer *manager_set_dns_server(Manager *m, DnsServer *s); DnsServer *manager_get_dns_server(Manager *m); void manager_next_dns_server(Manager *m); DEFINE_TRIVIAL_CLEANUP_FUNC(DnsServer*, dns_server_unref); extern const struct hash_ops dns_server_hash_ops;