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         /* DNS-SD */
 106         Hashmap *dnssd_services;
 107
 108         sd_event_source *mdns_ipv4_event_source;
 109         sd_event_source *mdns_ipv6_event_source;
 110
 111         /* dbus */
 112         sd_bus *bus;
 113         sd_event_source *bus_retry_event_source;
 114
 115         /* The hostname we publish on LLMNR and mDNS */
 116         char *full_hostname;
 117         char *llmnr_hostname;
 118         char *mdns_hostname;
 119         DnsResourceKey *llmnr_host_ipv4_key;
 120         DnsResourceKey *llmnr_host_ipv6_key;
 121         DnsResourceKey *mdns_host_ipv4_key;
 122         DnsResourceKey *mdns_host_ipv6_key;
 123
 124         /* Watch the system hostname */
 125         int hostname_fd;
 126         sd_event_source *hostname_event_source;
 127
 128         /* Watch for system suspends */
 129         sd_bus_slot *prepare_for_sleep_slot;
 130
 131         sd_event_source *sigusr1_event_source;
 132         sd_event_source *sigusr2_event_source;
 133         sd_event_source *sigrtmin1_event_source;
 134
 135         unsigned n_transactions_total;
 136         unsigned n_dnssec_verdict[_DNSSEC_VERDICT_MAX];
 137
 138         /* Data from /etc/hosts */
 139         Set* etc_hosts_by_address;
 140         Hashmap* etc_hosts_by_name;
 141         usec_t etc_hosts_last, etc_hosts_mtime;
 142
 143         /* Local DNS stub on 127.0.0.53:53 */
 144         int dns_stub_udp_fd;
 145         int dns_stub_tcp_fd;
 146
 147         sd_event_source *dns_stub_udp_event_source;
 148         sd_event_source *dns_stub_tcp_event_source;
 149
 150         Hashmap *polkit_registry;
 151 };
 152
 153 /* Manager */
 154
 155 int manager_new(Manager **ret);
 156 Manager* manager_free(Manager *m);
 157
 158 int manager_start(Manager *m);
 159
 160 uint32_t manager_find_mtu(Manager *m);
 161
 162 int manager_write(Manager *m, int fd, DnsPacket *p);
 163 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);
 164 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 165
 166 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 167 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 168
 169 void manager_refresh_rrs(Manager *m);
 170 int manager_next_hostname(Manager *m);
 171
 172 bool manager_our_packet(Manager *m, DnsPacket *p);
 173 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 174
 175 void manager_verify_all(Manager *m);
 176
 177 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 178
 179 #define EXTRA_CMSG_SPACE 1024
 180
 181 int manager_is_own_hostname(Manager *m, const char *name);
 182
 183 int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
 184 int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route);
 185
 186 DnssecMode manager_get_dnssec_mode(Manager *m);
 187 bool manager_dnssec_supported(Manager *m);
 188
 189 void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key);
 190
 191 bool manager_routable(Manager *m, int family);
 192
 193 void manager_flush_caches(Manager *m);
 194 void manager_reset_server_features(Manager *m);
 195
 196 void manager_cleanup_saved_user(Manager *m);
 197
 198 bool manager_next_dnssd_names(Manager *m);