src/resolve/resolved-manager.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright 2014 Tom Gundersen <teg@jklm.no>
   8
   9   systemd is free software; you can redistribute it and/or modify it
  10   under the terms of the GNU Lesser General Public License as published by
  11   the Free Software Foundation; either version 2.1 of the License, or
  12   (at your option) any later version.
  13
  14   systemd is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   Lesser General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  21 ***/
  22
  23 #include "sd-event.h"
  24 #include "sd-netlink.h"
  25 #include "sd-network.h"
  26
  27 #include "hashmap.h"
  28 #include "list.h"
  29 #include "ordered-set.h"
  30 #include "resolve-util.h"
  31
  32 typedef struct Manager Manager;
  33
  34 #include "resolved-conf.h"
  35 #include "resolved-dns-query.h"
  36 #include "resolved-dns-search-domain.h"
  37 #include "resolved-dns-server.h"
  38 #include "resolved-dns-stream.h"
  39 #include "resolved-dns-trust-anchor.h"
  40 #include "resolved-link.h"
  41
  42 #define MANAGER_SEARCH_DOMAINS_MAX 32
  43 #define MANAGER_DNS_SERVERS_MAX 32
  44
  45 struct Manager {
  46         sd_event *event;
  47
  48         ResolveSupport llmnr_support;
  49         ResolveSupport mdns_support;
  50         DnssecMode dnssec_mode;
  51         bool enable_cache;
  52         DnsStubListenerMode dns_stub_listener_mode;
  53
  54         /* Network */
  55         Hashmap *links;
  56
  57         sd_netlink *rtnl;
  58         sd_event_source *rtnl_event_source;
  59
  60         sd_network_monitor *network_monitor;
  61         sd_event_source *network_event_source;
  62
  63         /* DNS query management */
  64         Hashmap *dns_transactions;
  65         LIST_HEAD(DnsQuery, dns_queries);
  66         unsigned n_dns_queries;
  67
  68         LIST_HEAD(DnsStream, dns_streams);
  69         unsigned n_dns_streams;
  70
  71         /* Unicast dns */
  72         LIST_HEAD(DnsServer, dns_servers);
  73         LIST_HEAD(DnsServer, fallback_dns_servers);
  74         unsigned n_dns_servers; /* counts both main and fallback */
  75         DnsServer *current_dns_server;
  76
  77         LIST_HEAD(DnsSearchDomain, search_domains);
  78         unsigned n_search_domains;
  79
  80         bool need_builtin_fallbacks:1;
  81
  82         bool read_resolv_conf:1;
  83         usec_t resolv_conf_mtime;
  84
  85         DnsTrustAnchor trust_anchor;
  86
  87         LIST_HEAD(DnsScope, dns_scopes);
  88         DnsScope *unicast_scope;
  89
  90         /* LLMNR */
  91         int llmnr_ipv4_udp_fd;
  92         int llmnr_ipv6_udp_fd;
  93         int llmnr_ipv4_tcp_fd;
  94         int llmnr_ipv6_tcp_fd;
  95
  96         sd_event_source *llmnr_ipv4_udp_event_source;
  97         sd_event_source *llmnr_ipv6_udp_event_source;
  98         sd_event_source *llmnr_ipv4_tcp_event_source;
  99         sd_event_source *llmnr_ipv6_tcp_event_source;
 100
 101         /* mDNS */
 102         int mdns_ipv4_fd;
 103         int mdns_ipv6_fd;
 104
 105         sd_event_source *mdns_ipv4_event_source;
 106         sd_event_source *mdns_ipv6_event_source;
 107
 108         /* dbus */
 109         sd_bus *bus;
 110         sd_event_source *bus_retry_event_source;
 111
 112         /* The hostname we publish on LLMNR and mDNS */
 113         char *full_hostname;
 114         char *llmnr_hostname;
 115         char *mdns_hostname;
 116         DnsResourceKey *llmnr_host_ipv4_key;
 117         DnsResourceKey *llmnr_host_ipv6_key;
 118         DnsResourceKey *mdns_host_ipv4_key;
 119         DnsResourceKey *mdns_host_ipv6_key;
 120
 121         /* Watch the system hostname */
 122         int hostname_fd;
 123         sd_event_source *hostname_event_source;
 124
 125         /* Watch for system suspends */
 126         sd_bus_slot *prepare_for_sleep_slot;
 127
 128         sd_event_source *sigusr1_event_source;
 129         sd_event_source *sigusr2_event_source;
 130         sd_event_source *sigrtmin1_event_source;
 131
 132         unsigned n_transactions_total;
 133         unsigned n_dnssec_verdict[_DNSSEC_VERDICT_MAX];
 134
 135         /* Data from /etc/hosts */
 136         Set* etc_hosts_by_address;
 137         Hashmap* etc_hosts_by_name;
 138         usec_t etc_hosts_last, etc_hosts_mtime;
 139
 140         /* Local DNS stub on 127.0.0.53:53 */
 141         int dns_stub_udp_fd;
 142         int dns_stub_tcp_fd;
 143
 144         sd_event_source *dns_stub_udp_event_source;
 145         sd_event_source *dns_stub_tcp_event_source;
 146 };
 147
 148 /* Manager */
 149
 150 int manager_new(Manager **ret);
 151 Manager* manager_free(Manager *m);
 152
 153 int manager_start(Manager *m);
 154
 155 uint32_t manager_find_mtu(Manager *m);
 156
 157 int manager_write(Manager *m, int fd, DnsPacket *p);
 158 int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *destination, uint16_t port, const union in_addr_union *source, DnsPacket *p);
 159 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 160
 161 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 162 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 163
 164 void manager_refresh_rrs(Manager *m);
 165 int manager_next_hostname(Manager *m);
 166
 167 bool manager_our_packet(Manager *m, DnsPacket *p);
 168 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 169
 170 void manager_verify_all(Manager *m);
 171
 172 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 173
 174 #define EXTRA_CMSG_SPACE 1024
 175
 176 int manager_is_own_hostname(Manager *m, const char *name);
 177
 178 int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
 179 int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route);
 180
 181 DnssecMode manager_get_dnssec_mode(Manager *m);
 182 bool manager_dnssec_supported(Manager *m);
 183
 184 void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key);
 185
 186 bool manager_routable(Manager *m, int family);
 187
 188 void manager_flush_caches(Manager *m);
 189 void manager_reset_server_features(Manager *m);
 190
 191 void manager_cleanup_saved_user(Manager *m);