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