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
  10 #include "sd-event.h"
  11 #include "sd-netlink.h"
  12 #include "sd-network.h"
  13
  14 #include "hashmap.h"
  15 #include "list.h"
  16 #include "ordered-set.h"
  17 #include "resolve-util.h"
  18
  19 typedef struct Manager Manager;
  20
  21 #include "resolved-conf.h"
  22 #include "resolved-dns-query.h"
  23 #include "resolved-dns-search-domain.h"
  24 #include "resolved-dns-server.h"
  25 #include "resolved-dns-stream.h"
  26 #include "resolved-dns-trust-anchor.h"
  27 #include "resolved-link.h"
  28
  29 #define MANAGER_SEARCH_DOMAINS_MAX 32
  30 #define MANAGER_DNS_SERVERS_MAX 32
  31
  32 struct Manager {
  33         sd_event *event;
  34
  35         ResolveSupport llmnr_support;
  36         ResolveSupport mdns_support;
  37         DnssecMode dnssec_mode;
  38         bool enable_cache;
  39         DnsStubListenerMode dns_stub_listener_mode;
  40
  41         /* Network */
  42         Hashmap *links;
  43
  44         sd_netlink *rtnl;
  45         sd_event_source *rtnl_event_source;
  46
  47         sd_network_monitor *network_monitor;
  48         sd_event_source *network_event_source;
  49
  50         /* DNS query management */
  51         Hashmap *dns_transactions;
  52         LIST_HEAD(DnsQuery, dns_queries);
  53         unsigned n_dns_queries;
  54
  55         LIST_HEAD(DnsStream, dns_streams);
  56         unsigned n_dns_streams;
  57
  58         /* Unicast dns */
  59         LIST_HEAD(DnsServer, dns_servers);
  60         LIST_HEAD(DnsServer, fallback_dns_servers);
  61         unsigned n_dns_servers; /* counts both main and fallback */
  62         DnsServer *current_dns_server;
  63
  64         LIST_HEAD(DnsSearchDomain, search_domains);
  65         unsigned n_search_domains;
  66
  67         bool need_builtin_fallbacks:1;
  68
  69         bool read_resolv_conf:1;
  70         usec_t resolv_conf_mtime;
  71
  72         DnsTrustAnchor trust_anchor;
  73
  74         LIST_HEAD(DnsScope, dns_scopes);
  75         DnsScope *unicast_scope;
  76
  77         /* LLMNR */
  78         int llmnr_ipv4_udp_fd;
  79         int llmnr_ipv6_udp_fd;
  80         int llmnr_ipv4_tcp_fd;
  81         int llmnr_ipv6_tcp_fd;
  82
  83         sd_event_source *llmnr_ipv4_udp_event_source;
  84         sd_event_source *llmnr_ipv6_udp_event_source;
  85         sd_event_source *llmnr_ipv4_tcp_event_source;
  86         sd_event_source *llmnr_ipv6_tcp_event_source;
  87
  88         /* mDNS */
  89         int mdns_ipv4_fd;
  90         int mdns_ipv6_fd;
  91
  92         /* DNS-SD */
  93         Hashmap *dnssd_services;
  94
  95         sd_event_source *mdns_ipv4_event_source;
  96         sd_event_source *mdns_ipv6_event_source;
  97
  98         /* dbus */
  99         sd_bus *bus;
 100         sd_event_source *bus_retry_event_source;
 101
 102         /* The hostname we publish on LLMNR and mDNS */
 103         char *full_hostname;
 104         char *llmnr_hostname;
 105         char *mdns_hostname;
 106         DnsResourceKey *llmnr_host_ipv4_key;
 107         DnsResourceKey *llmnr_host_ipv6_key;
 108         DnsResourceKey *mdns_host_ipv4_key;
 109         DnsResourceKey *mdns_host_ipv6_key;
 110
 111         /* Watch the system hostname */
 112         int hostname_fd;
 113         sd_event_source *hostname_event_source;
 114
 115         /* Watch for system suspends */
 116         sd_bus_slot *prepare_for_sleep_slot;
 117
 118         sd_event_source *sigusr1_event_source;
 119         sd_event_source *sigusr2_event_source;
 120         sd_event_source *sigrtmin1_event_source;
 121
 122         unsigned n_transactions_total;
 123         unsigned n_dnssec_verdict[_DNSSEC_VERDICT_MAX];
 124
 125         /* Data from /etc/hosts */
 126         Set* etc_hosts_by_address;
 127         Hashmap* etc_hosts_by_name;
 128         usec_t etc_hosts_last, etc_hosts_mtime;
 129
 130         /* Local DNS stub on 127.0.0.53:53 */
 131         int dns_stub_udp_fd;
 132         int dns_stub_tcp_fd;
 133
 134         sd_event_source *dns_stub_udp_event_source;
 135         sd_event_source *dns_stub_tcp_event_source;
 136
 137         Hashmap *polkit_registry;
 138 };
 139
 140 /* Manager */
 141
 142 int manager_new(Manager **ret);
 143 Manager* manager_free(Manager *m);
 144
 145 int manager_start(Manager *m);
 146
 147 uint32_t manager_find_mtu(Manager *m);
 148
 149 int manager_write(Manager *m, int fd, DnsPacket *p);
 150 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);
 151 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 152
 153 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 154 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 155
 156 void manager_refresh_rrs(Manager *m);
 157 int manager_next_hostname(Manager *m);
 158
 159 bool manager_our_packet(Manager *m, DnsPacket *p);
 160 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 161
 162 void manager_verify_all(Manager *m);
 163
 164 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 165
 166 #define EXTRA_CMSG_SPACE 1024
 167
 168 int manager_is_own_hostname(Manager *m, const char *name);
 169
 170 int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
 171 int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route);
 172
 173 DnssecMode manager_get_dnssec_mode(Manager *m);
 174 bool manager_dnssec_supported(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);