src/resolve/resolved-manager.h

   1 #pragma once
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2014 Tom Gundersen <teg@jklm.no>
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include "sd-event.h"
  23 #include "sd-netlink.h"
  24 #include "sd-network.h"
  25
  26 #include "hashmap.h"
  27 #include "list.h"
  28 #include "ordered-set.h"
  29 #include "resolve-util.h"
  30
  31 typedef struct Manager Manager;
  32
  33 #include "resolved-conf.h"
  34 #include "resolved-dns-query.h"
  35 #include "resolved-dns-search-domain.h"
  36 #include "resolved-dns-server.h"
  37 #include "resolved-dns-stream.h"
  38 #include "resolved-dns-trust-anchor.h"
  39 #include "resolved-link.h"
  40
  41 #define MANAGER_SEARCH_DOMAINS_MAX 32
  42 #define MANAGER_DNS_SERVERS_MAX 32
  43
  44 struct Manager {
  45         sd_event *event;
  46
  47         ResolveSupport llmnr_support;
  48         ResolveSupport mdns_support;
  49         DnssecMode dnssec_mode;
  50         bool enable_cache;
  51         DnsStubListenerMode dns_stub_listener_mode;
  52
  53         /* Network */
  54         Hashmap *links;
  55
  56         sd_netlink *rtnl;
  57         sd_event_source *rtnl_event_source;
  58
  59         sd_network_monitor *network_monitor;
  60         sd_event_source *network_event_source;
  61
  62         /* DNS query management */
  63         Hashmap *dns_transactions;
  64         LIST_HEAD(DnsQuery, dns_queries);
  65         unsigned n_dns_queries;
  66
  67         LIST_HEAD(DnsStream, dns_streams);
  68         unsigned n_dns_streams;
  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:1;
  80
  81         bool read_resolv_conf:1;
  82         usec_t resolv_conf_mtime;
  83
  84         DnsTrustAnchor trust_anchor;
  85
  86         LIST_HEAD(DnsScope, dns_scopes);
  87         DnsScope *unicast_scope;
  88
  89         /* LLMNR */
  90         int llmnr_ipv4_udp_fd;
  91         int llmnr_ipv6_udp_fd;
  92         int llmnr_ipv4_tcp_fd;
  93         int llmnr_ipv6_tcp_fd;
  94
  95         sd_event_source *llmnr_ipv4_udp_event_source;
  96         sd_event_source *llmnr_ipv6_udp_event_source;
  97         sd_event_source *llmnr_ipv4_tcp_event_source;
  98         sd_event_source *llmnr_ipv6_tcp_event_source;
  99
 100         /* mDNS */
 101         int mdns_ipv4_fd;
 102         int mdns_ipv6_fd;
 103
 104         sd_event_source *mdns_ipv4_event_source;
 105         sd_event_source *mdns_ipv6_event_source;
 106
 107         /* dbus */
 108         sd_bus *bus;
 109         sd_event_source *bus_retry_event_source;
 110
 111         /* The hostname we publish on LLMNR and mDNS */
 112         char *full_hostname;
 113         char *llmnr_hostname;
 114         char *mdns_hostname;
 115         DnsResourceKey *llmnr_host_ipv4_key;
 116         DnsResourceKey *llmnr_host_ipv6_key;
 117         DnsResourceKey *mdns_host_ipv4_key;
 118         DnsResourceKey *mdns_host_ipv6_key;
 119
 120         /* Watch the system hostname */
 121         int hostname_fd;
 122         sd_event_source *hostname_event_source;
 123
 124         /* Watch for system suspends */
 125         sd_bus_slot *prepare_for_sleep_slot;
 126
 127         sd_event_source *sigusr1_event_source;
 128         sd_event_source *sigusr2_event_source;
 129
 130         unsigned n_transactions_total;
 131         unsigned n_dnssec_verdict[_DNSSEC_VERDICT_MAX];
 132
 133         /* Data from /etc/hosts */
 134         Set* etc_hosts_by_address;
 135         Hashmap* etc_hosts_by_name;
 136         usec_t etc_hosts_last, etc_hosts_mtime;
 137
 138         /* Local DNS stub on 127.0.0.53:53 */
 139         int dns_stub_udp_fd;
 140         int dns_stub_tcp_fd;
 141
 142         sd_event_source *dns_stub_udp_event_source;
 143         sd_event_source *dns_stub_tcp_event_source;
 144 };
 145
 146 /* Manager */
 147
 148 int manager_new(Manager **ret);
 149 Manager* manager_free(Manager *m);
 150
 151 int manager_start(Manager *m);
 152
 153 uint32_t manager_find_mtu(Manager *m);
 154
 155 int manager_write(Manager *m, int fd, DnsPacket *p);
 156 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);
 157 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 158
 159 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 160 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 161
 162 void manager_refresh_rrs(Manager *m);
 163 int manager_next_hostname(Manager *m);
 164
 165 bool manager_our_packet(Manager *m, DnsPacket *p);
 166 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 167
 168 void manager_verify_all(Manager *m);
 169
 170 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 171
 172 #define EXTRA_CMSG_SPACE 1024
 173
 174 int manager_is_own_hostname(Manager *m, const char *name);
 175
 176 int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
 177 int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route);
 178
 179 DnssecMode manager_get_dnssec_mode(Manager *m);
 180 bool manager_dnssec_supported(Manager *m);
 181
 182 void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key);
 183
 184 bool manager_routable(Manager *m, int family);
 185
 186 void manager_flush_caches(Manager *m);
 187 void manager_reset_server_features(Manager *m);
 188
 189 void manager_cleanup_saved_user(Manager *m);