src/resolve/resolved-manager.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 #include <sys/stat.h>
   5
   6 #include "sd-event.h"
   7 #include "sd-netlink.h"
   8 #include "sd-network.h"
   9
  10 #include "common-signal.h"
  11 #include "hashmap.h"
  12 #include "list.h"
  13 #include "ordered-set.h"
  14 #include "resolve-util.h"
  15 #include "varlink.h"
  16
  17 typedef struct Manager Manager;
  18
  19 #include "resolved-dns-query.h"
  20 #include "resolved-dns-search-domain.h"
  21 #include "resolved-dns-stream.h"
  22 #include "resolved-dns-stub.h"
  23 #include "resolved-dns-trust-anchor.h"
  24 #include "resolved-link.h"
  25 #include "resolved-socket-graveyard.h"
  26
  27 #define MANAGER_SEARCH_DOMAINS_MAX 256
  28 #define MANAGER_DNS_SERVERS_MAX 256
  29
  30 typedef struct EtcHosts {
  31         Hashmap *by_address;
  32         Hashmap *by_name;
  33         Set *no_address;
  34 } EtcHosts;
  35
  36 struct Manager {
  37         sd_event *event;
  38
  39         ResolveSupport llmnr_support;
  40         ResolveSupport mdns_support;
  41         DnssecMode dnssec_mode;
  42         DnsOverTlsMode dns_over_tls_mode;
  43         DnsCacheMode enable_cache;
  44         bool cache_from_localhost;
  45         DnsStubListenerMode dns_stub_listener_mode;
  46         usec_t stale_retention_usec;
  47
  48 #if ENABLE_DNS_OVER_TLS
  49         DnsTlsManagerData dnstls_data;
  50 #endif
  51
  52         /* Network */
  53         Hashmap *links;
  54
  55         sd_netlink *rtnl;
  56         sd_event_source *rtnl_event_source;
  57
  58         sd_network_monitor *network_monitor;
  59         sd_event_source *network_event_source;
  60
  61         /* DNS query management */
  62         Hashmap *dns_transactions;
  63         LIST_HEAD(DnsQuery, dns_queries);
  64         unsigned n_dns_queries;
  65         Hashmap *stub_queries_by_packet;
  66
  67         LIST_HEAD(DnsStream, dns_streams);
  68         unsigned n_dns_streams[_DNS_STREAM_TYPE_MAX];
  69
  70         /* Unicast dns */
  71         LIST_HEAD(DnsServer, dns_servers);
  72         LIST_HEAD(DnsServer, fallback_dns_servers);
  73         unsigned n_dns_servers; /* counts both main and fallback */
  74         DnsServer *current_dns_server;
  75
  76         LIST_HEAD(DnsSearchDomain, search_domains);
  77         unsigned n_search_domains;
  78
  79         bool need_builtin_fallbacks;
  80         bool read_resolv_conf;
  81         bool resolve_unicast_single_label;
  82
  83         struct stat resolv_conf_stat;
  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         sd_event_source *mdns_ipv4_event_source;
 105         sd_event_source *mdns_ipv6_event_source;
 106
 107         /* DNS-SD */
 108         Hashmap *dnssd_services;
 109
 110         /* dbus */
 111         sd_bus *bus;
 112
 113         /* The hostname we publish on LLMNR and mDNS */
 114         char *full_hostname;
 115         char *llmnr_hostname;
 116         char *mdns_hostname;
 117         DnsResourceKey *llmnr_host_ipv4_key;
 118         DnsResourceKey *llmnr_host_ipv6_key;
 119         DnsResourceKey *mdns_host_ipv4_key;
 120         DnsResourceKey *mdns_host_ipv6_key;
 121
 122         /* Watch the system hostname */
 123         int hostname_fd;
 124         sd_event_source *hostname_event_source;
 125
 126         sd_event_source *sigusr1_event_source;
 127         sd_event_source *sigusr2_event_source;
 128         sd_event_source *sigrtmin1_event_source;
 129
 130         unsigned n_transactions_total;
 131         unsigned n_timeouts_total;
 132         unsigned n_timeouts_served_stale_total;
 133         unsigned n_failure_responses_total;
 134         unsigned n_failure_responses_served_stale_total;
 135
 136         unsigned n_dnssec_verdict[_DNSSEC_VERDICT_MAX];
 137
 138         /* Data from /etc/hosts */
 139         EtcHosts etc_hosts;
 140         usec_t etc_hosts_last;
 141         struct stat etc_hosts_stat;
 142         bool read_etc_hosts;
 143
 144         OrderedSet *dns_extra_stub_listeners;
 145
 146         /* Local DNS stub on 127.0.0.53:53 */
 147         sd_event_source *dns_stub_udp_event_source;
 148         sd_event_source *dns_stub_tcp_event_source;
 149
 150         /* Local DNS proxy stub on 127.0.0.54:53 */
 151         sd_event_source *dns_proxy_stub_udp_event_source;
 152         sd_event_source *dns_proxy_stub_tcp_event_source;
 153
 154         Hashmap *polkit_registry;
 155
 156         VarlinkServer *varlink_server;
 157         VarlinkServer *varlink_monitor_server;
 158
 159         Set *varlink_subscription;
 160
 161         sd_event_source *clock_change_event_source;
 162
 163         LIST_HEAD(SocketGraveyard, socket_graveyard);
 164         SocketGraveyard *socket_graveyard_oldest;
 165         size_t n_socket_graveyard;
 166
 167         struct sigrtmin18_info sigrtmin18_info;
 168 };
 169
 170 /* Manager */
 171
 172 int manager_new(Manager **ret);
 173 Manager* manager_free(Manager *m);
 174
 175 int manager_start(Manager *m);
 176
 177 uint32_t manager_find_mtu(Manager *m);
 178
 179 int manager_monitor_send(Manager *m, int state, int rcode, int error, DnsQuestion *question_idna, DnsQuestion *question_utf8, DnsPacket *question_bypass, DnsQuestion *collected_questions, DnsAnswer *answer);
 180
 181 int manager_write(Manager *m, int fd, DnsPacket *p);
 182 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);
 183 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 184
 185 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 186 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 187
 188 void manager_refresh_rrs(Manager *m);
 189 int manager_next_hostname(Manager *m);
 190
 191 bool manager_packet_from_local_address(Manager *m, DnsPacket *p);
 192 bool manager_packet_from_our_transaction(Manager *m, DnsPacket *p);
 193
 194 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 195
 196 void manager_verify_all(Manager *m);
 197
 198 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 199
 200 /* For some reason we need some extra cmsg space on some kernels/archs. One of those days we need to figure out why */
 201 #define EXTRA_CMSG_SPACE 1024
 202
 203 int manager_is_own_hostname(Manager *m, const char *name);
 204
 205 int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
 206 int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route);
 207
 208 DnssecMode manager_get_dnssec_mode(Manager *m);
 209 bool manager_dnssec_supported(Manager *m);
 210
 211 DnsOverTlsMode manager_get_dns_over_tls_mode(Manager *m);
 212
 213 void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key);
 214
 215 bool manager_routable(Manager *m);
 216
 217 void manager_flush_caches(Manager *m, int log_level);
 218 void manager_reset_server_features(Manager *m);
 219
 220 void manager_cleanup_saved_user(Manager *m);
 221
 222 bool manager_next_dnssd_names(Manager *m);
 223
 224 bool manager_server_is_stub(Manager *m, DnsServer *s);
 225
 226 int socket_disable_pmtud(int fd, int af);
 227
 228 int dns_manager_dump_statistics_json(Manager *m, JsonVariant **ret);
 229
 230 void dns_manager_reset_statistics(Manager *m);