src/resolve/resolved-manager.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   Copyright © 2014 Tom Gundersen <teg@jklm.no>
   6 ***/
   7
   8 #include "sd-event.h"
   9 #include "sd-netlink.h"
  10 #include "sd-network.h"
  11
  12 #include "hashmap.h"
  13 #include "list.h"
  14 #include "ordered-set.h"
  15 #include "resolve-util.h"
  16
  17 typedef struct Manager Manager;
  18
  19 #include "resolved-conf.h"
  20 #include "resolved-dns-query.h"
  21 #include "resolved-dns-search-domain.h"
  22 #include "resolved-dns-server.h"
  23 #include "resolved-dns-stream.h"
  24 #include "resolved-dns-trust-anchor.h"
  25 #include "resolved-link.h"
  26
  27 #define MANAGER_SEARCH_DOMAINS_MAX 32
  28 #define MANAGER_DNS_SERVERS_MAX 32
  29
  30 struct Manager {
  31         sd_event *event;
  32
  33         ResolveSupport llmnr_support;
  34         ResolveSupport mdns_support;
  35         DnssecMode dnssec_mode;
  36         DnsOverTlsMode dns_over_tls_mode;
  37         bool enable_cache;
  38         DnsStubListenerMode dns_stub_listener_mode;
  39
  40         /* Network */
  41         Hashmap *links;
  42
  43         sd_netlink *rtnl;
  44         sd_event_source *rtnl_event_source;
  45
  46         sd_network_monitor *network_monitor;
  47         sd_event_source *network_event_source;
  48
  49         /* DNS query management */
  50         Hashmap *dns_transactions;
  51         LIST_HEAD(DnsQuery, dns_queries);
  52         unsigned n_dns_queries;
  53
  54         LIST_HEAD(DnsStream, dns_streams);
  55         unsigned n_dns_streams;
  56
  57         /* Unicast dns */
  58         LIST_HEAD(DnsServer, dns_servers);
  59         LIST_HEAD(DnsServer, fallback_dns_servers);
  60         unsigned n_dns_servers; /* counts both main and fallback */
  61         DnsServer *current_dns_server;
  62
  63         LIST_HEAD(DnsSearchDomain, search_domains);
  64         unsigned n_search_domains;
  65
  66         bool need_builtin_fallbacks:1;
  67
  68         bool read_resolv_conf:1;
  69         usec_t resolv_conf_mtime;
  70
  71         DnsTrustAnchor trust_anchor;
  72
  73         LIST_HEAD(DnsScope, dns_scopes);
  74         DnsScope *unicast_scope;
  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
  91         /* DNS-SD */
  92         Hashmap *dnssd_services;
  93
  94         sd_event_source *mdns_ipv4_event_source;
  95         sd_event_source *mdns_ipv6_event_source;
  96
  97         /* dbus */
  98         sd_bus *bus;
  99
 100         /* The hostname we publish on LLMNR and mDNS */
 101         char *full_hostname;
 102         char *llmnr_hostname;
 103         char *mdns_hostname;
 104         DnsResourceKey *llmnr_host_ipv4_key;
 105         DnsResourceKey *llmnr_host_ipv6_key;
 106         DnsResourceKey *mdns_host_ipv4_key;
 107         DnsResourceKey *mdns_host_ipv6_key;
 108
 109         /* Watch the system hostname */
 110         int hostname_fd;
 111         sd_event_source *hostname_event_source;
 112
 113         /* Watch for system suspends */
 114         sd_bus_slot *prepare_for_sleep_slot;
 115
 116         sd_event_source *sigusr1_event_source;
 117         sd_event_source *sigusr2_event_source;
 118         sd_event_source *sigrtmin1_event_source;
 119
 120         unsigned n_transactions_total;
 121         unsigned n_dnssec_verdict[_DNSSEC_VERDICT_MAX];
 122
 123         /* Data from /etc/hosts */
 124         Set* etc_hosts_by_address;
 125         Hashmap* etc_hosts_by_name;
 126         usec_t etc_hosts_last, etc_hosts_mtime;
 127
 128         /* Local DNS stub on 127.0.0.53:53 */
 129         int dns_stub_udp_fd;
 130         int dns_stub_tcp_fd;
 131
 132         sd_event_source *dns_stub_udp_event_source;
 133         sd_event_source *dns_stub_tcp_event_source;
 134
 135         Hashmap *polkit_registry;
 136 };
 137
 138 /* Manager */
 139
 140 int manager_new(Manager **ret);
 141 Manager* manager_free(Manager *m);
 142
 143 int manager_start(Manager *m);
 144
 145 uint32_t manager_find_mtu(Manager *m);
 146
 147 int manager_write(Manager *m, int fd, DnsPacket *p);
 148 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);
 149 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 150
 151 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 152 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 153
 154 void manager_refresh_rrs(Manager *m);
 155 int manager_next_hostname(Manager *m);
 156
 157 bool manager_our_packet(Manager *m, DnsPacket *p);
 158 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 159
 160 void manager_verify_all(Manager *m);
 161
 162 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 163
 164 #define EXTRA_CMSG_SPACE 1024
 165
 166 int manager_is_own_hostname(Manager *m, const char *name);
 167
 168 int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
 169 int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route);
 170
 171 DnssecMode manager_get_dnssec_mode(Manager *m);
 172 bool manager_dnssec_supported(Manager *m);
 173
 174 DnsOverTlsMode manager_get_dns_over_tls_mode(Manager *m);
 175
 176 void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key);
 177
 178 bool manager_routable(Manager *m, int family);
 179
 180 void manager_flush_caches(Manager *m);
 181 void manager_reset_server_features(Manager *m);
 182
 183 void manager_cleanup_saved_user(Manager *m);
 184
 185 bool manager_next_dnssd_names(Manager *m);