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 "common-signal.h"
   7 #include "forward.h"
   8 #include "list.h"
   9 #include "resolve-util.h"
  10 #include "resolved-dns-dnssec.h"
  11 #include "resolved-dns-stream.h"
  12 #include "resolved-dns-stub.h"
  13 #include "resolved-dns-trust-anchor.h"
  14 #include "resolved-etc-hosts.h"
  15 #include "resolved-forward.h"
  16
  17 #define MANAGER_SEARCH_DOMAINS_MAX 256
  18 #define MANAGER_DNS_SERVERS_MAX 256
  19
  20 typedef struct Manager {
  21         sd_event *event;
  22
  23         ResolveSupport llmnr_support;
  24         ResolveSupport mdns_support;
  25         DnssecMode dnssec_mode;
  26         DnsOverTlsMode dns_over_tls_mode;
  27         DnsCacheMode enable_cache;
  28         bool cache_from_localhost;
  29         DnsStubListenerMode dns_stub_listener_mode;
  30         usec_t stale_retention_usec;
  31
  32 #if ENABLE_DNS_OVER_TLS
  33         DnsTlsManagerData dnstls_data;
  34 #endif
  35
  36         /* Network */
  37         Hashmap *links;
  38
  39         sd_netlink *rtnl;
  40         sd_event_source *rtnl_event_source;
  41
  42         sd_network_monitor *network_monitor;
  43         sd_event_source *network_event_source;
  44
  45         /* DNS query management */
  46         Hashmap *dns_transactions;
  47         LIST_HEAD(DnsQuery, dns_queries);
  48         unsigned n_dns_queries;
  49         Hashmap *stub_queries_by_packet;
  50
  51         LIST_HEAD(DnsStream, dns_streams);
  52         unsigned n_dns_streams[_DNS_STREAM_TYPE_MAX];
  53
  54         /* Unicast dns */
  55         LIST_HEAD(DnsServer, dns_servers);
  56         LIST_HEAD(DnsServer, fallback_dns_servers);
  57         unsigned n_dns_servers; /* counts both main and fallback */
  58         DnsServer *current_dns_server;
  59
  60         LIST_HEAD(DnsSearchDomain, search_domains);
  61         unsigned n_search_domains;
  62
  63         bool need_builtin_fallbacks;
  64         bool read_resolv_conf;
  65         bool resolve_unicast_single_label;
  66
  67         struct stat resolv_conf_stat;
  68
  69         DnsTrustAnchor trust_anchor;
  70
  71         LIST_HEAD(DnsScope, dns_scopes);
  72         DnsScope *unicast_scope;
  73
  74         Hashmap *delegates; /* id string → DnsDelegate objects */
  75
  76         /* LLMNR */
  77         int llmnr_ipv4_udp_fd;
  78         int llmnr_ipv6_udp_fd;
  79         int llmnr_ipv4_tcp_fd;
  80         int llmnr_ipv6_tcp_fd;
  81
  82         sd_event_source *llmnr_ipv4_udp_event_source;
  83         sd_event_source *llmnr_ipv6_udp_event_source;
  84         sd_event_source *llmnr_ipv4_tcp_event_source;
  85         sd_event_source *llmnr_ipv6_tcp_event_source;
  86
  87         /* mDNS */
  88         int mdns_ipv4_fd;
  89         int mdns_ipv6_fd;
  90         sd_event_source *mdns_ipv4_event_source;
  91         sd_event_source *mdns_ipv6_event_source;
  92
  93         /* DNS-SD */
  94         Hashmap *dnssd_services;
  95
  96         /* dbus */
  97         sd_bus *bus;
  98
  99         /* The hostname we publish on LLMNR and mDNS */
 100         char *full_hostname;
 101         char *llmnr_hostname;
 102         char *mdns_hostname;
 103         DnsResourceKey *llmnr_host_ipv4_key;
 104         DnsResourceKey *llmnr_host_ipv6_key;
 105         DnsResourceKey *mdns_host_ipv4_key;
 106         DnsResourceKey *mdns_host_ipv6_key;
 107
 108         /* Watch the system hostname */
 109         int hostname_fd;
 110         sd_event_source *hostname_event_source;
 111
 112         unsigned n_transactions_total;
 113         unsigned n_timeouts_total;
 114         unsigned n_timeouts_served_stale_total;
 115         unsigned n_failure_responses_total;
 116         unsigned n_failure_responses_served_stale_total;
 117
 118         unsigned n_dnssec_verdict[_DNSSEC_VERDICT_MAX];
 119
 120         /* Data from /etc/hosts */
 121         EtcHosts etc_hosts;
 122         usec_t etc_hosts_last;
 123         struct stat etc_hosts_stat;
 124         bool read_etc_hosts;
 125
 126         /* List of refused DNS Record Types*/
 127         Set *refuse_record_types;
 128
 129         OrderedSet *dns_extra_stub_listeners;
 130
 131         /* Local DNS stub on 127.0.0.53:53 */
 132         sd_event_source *dns_stub_udp_event_source;
 133         sd_event_source *dns_stub_tcp_event_source;
 134
 135         /* Local DNS proxy stub on 127.0.0.54:53 */
 136         sd_event_source *dns_proxy_stub_udp_event_source;
 137         sd_event_source *dns_proxy_stub_tcp_event_source;
 138
 139         Hashmap *polkit_registry;
 140
 141         sd_varlink_server *varlink_server;
 142         sd_varlink_server *varlink_monitor_server;
 143
 144         Set *varlink_query_results_subscription;
 145         Set *varlink_dns_configuration_subscription;
 146
 147         sd_json_variant *dns_configuration_json;
 148
 149         sd_netlink_slot *netlink_new_route_slot;
 150         sd_netlink_slot *netlink_del_route_slot;
 151
 152         sd_event_source *clock_change_event_source;
 153
 154         LIST_HEAD(SocketGraveyard, socket_graveyard);
 155         SocketGraveyard *socket_graveyard_oldest;
 156         size_t n_socket_graveyard;
 157
 158         struct sigrtmin18_info sigrtmin18_info;
 159 } Manager;
 160
 161 /* Manager */
 162
 163 int manager_new(Manager **ret);
 164 Manager* manager_free(Manager *m);
 165
 166 int manager_start(Manager *m);
 167
 168 uint32_t manager_find_mtu(Manager *m);
 169
 170 int manager_monitor_send(Manager *m, DnsQuery *q);
 171
 172 int sendmsg_loop(int fd, struct msghdr *mh, int flags);
 173 int manager_write(Manager *m, int fd, DnsPacket *p);
 174 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);
 175 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 176
 177 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 178 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 179
 180 void manager_refresh_rrs(Manager *m);
 181 int manager_next_hostname(Manager *m);
 182
 183 bool manager_packet_from_local_address(Manager *m, DnsPacket *p);
 184 bool manager_packet_from_our_transaction(Manager *m, DnsPacket *p);
 185
 186 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 187
 188 void manager_verify_all(Manager *m);
 189
 190 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 191
 192 /* For some reason we need some extra cmsg space on some kernels/archs. One of those days we need to figure out why */
 193 #define EXTRA_CMSG_SPACE 1024
 194
 195 int manager_is_own_hostname(Manager *m, const char *name);
 196
 197 int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
 198 int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route);
 199
 200 DnssecMode manager_get_dnssec_mode(Manager *m);
 201 bool manager_dnssec_supported(Manager *m);
 202
 203 DnsOverTlsMode manager_get_dns_over_tls_mode(Manager *m);
 204
 205 void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key);
 206
 207 bool manager_routable(Manager *m);
 208
 209 void manager_flush_caches(Manager *m, int log_level);
 210 void manager_reset_server_features(Manager *m);
 211
 212 void manager_cleanup_saved_user(Manager *m);
 213
 214 bool manager_next_dnssd_names(Manager *m);
 215
 216 bool manager_server_is_stub(Manager *m, DnsServer *s);
 217
 218 int socket_disable_pmtud(int fd, int af);
 219
 220 int dns_manager_dump_statistics_json(Manager *m, sd_json_variant **ret);
 221
 222 void dns_manager_reset_statistics(Manager *m);
 223
 224 int manager_dump_dns_configuration_json(Manager *m, sd_json_variant **ret);
 225 int manager_send_dns_configuration_changed(Manager *m, Link *l, bool reset);
 226
 227 int manager_start_dns_configuration_monitor(Manager *m);
 228 void manager_stop_dns_configuration_monitor(Manager *m);