src/resolve/resolved-manager.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 #include "sd-event.h"
   5 #include "sd-netlink.h"
   6 #include "sd-network.h"
   7
   8 #include "hashmap.h"
   9 #include "list.h"
  10 #include "ordered-set.h"
  11 #include "resolve-util.h"
  12
  13 typedef struct Manager Manager;
  14
  15 #include "resolved-conf.h"
  16 #include "resolved-dns-query.h"
  17 #include "resolved-dns-search-domain.h"
  18 #include "resolved-dns-server.h"
  19 #include "resolved-dns-stream.h"
  20 #include "resolved-dns-trust-anchor.h"
  21 #include "resolved-dnstls.h"
  22 #include "resolved-link.h"
  23
  24 #define MANAGER_SEARCH_DOMAINS_MAX 256
  25 #define MANAGER_DNS_SERVERS_MAX 256
  26
  27 typedef struct EtcHosts {
  28         Hashmap *by_address;
  29         Hashmap *by_name;
  30         Set *no_address;
  31 } EtcHosts;
  32
  33 struct Manager {
  34         sd_event *event;
  35
  36         ResolveSupport llmnr_support;
  37         ResolveSupport mdns_support;
  38         DnssecMode dnssec_mode;
  39         DnsOverTlsMode dns_over_tls_mode;
  40         bool enable_cache;
  41         DnsStubListenerMode dns_stub_listener_mode;
  42
  43 #if ENABLE_DNS_OVER_TLS
  44         DnsTlsManagerData dnstls_data;
  45 #endif
  46
  47         /* Network */
  48         Hashmap *links;
  49
  50         sd_netlink *rtnl;
  51         sd_event_source *rtnl_event_source;
  52
  53         sd_network_monitor *network_monitor;
  54         sd_event_source *network_event_source;
  55
  56         /* DNS query management */
  57         Hashmap *dns_transactions;
  58         LIST_HEAD(DnsQuery, dns_queries);
  59         unsigned n_dns_queries;
  60
  61         LIST_HEAD(DnsStream, dns_streams);
  62         unsigned n_dns_streams[_DNS_STREAM_TYPE_MAX];
  63
  64         /* Unicast dns */
  65         LIST_HEAD(DnsServer, dns_servers);
  66         LIST_HEAD(DnsServer, fallback_dns_servers);
  67         unsigned n_dns_servers; /* counts both main and fallback */
  68         DnsServer *current_dns_server;
  69
  70         LIST_HEAD(DnsSearchDomain, search_domains);
  71         unsigned n_search_domains;
  72
  73         bool need_builtin_fallbacks:1;
  74
  75         bool read_resolv_conf:1;
  76         usec_t resolv_conf_mtime;
  77
  78         DnsTrustAnchor trust_anchor;
  79
  80         LIST_HEAD(DnsScope, dns_scopes);
  81         DnsScope *unicast_scope;
  82
  83         /* LLMNR */
  84         int llmnr_ipv4_udp_fd;
  85         int llmnr_ipv6_udp_fd;
  86         int llmnr_ipv4_tcp_fd;
  87         int llmnr_ipv6_tcp_fd;
  88
  89         sd_event_source *llmnr_ipv4_udp_event_source;
  90         sd_event_source *llmnr_ipv6_udp_event_source;
  91         sd_event_source *llmnr_ipv4_tcp_event_source;
  92         sd_event_source *llmnr_ipv6_tcp_event_source;
  93
  94         /* mDNS */
  95         int mdns_ipv4_fd;
  96         int mdns_ipv6_fd;
  97
  98         /* DNS-SD */
  99         Hashmap *dnssd_services;
 100
 101         sd_event_source *mdns_ipv4_event_source;
 102         sd_event_source *mdns_ipv6_event_source;
 103
 104         /* dbus */
 105         sd_bus *bus;
 106
 107         /* The hostname we publish on LLMNR and mDNS */
 108         char *full_hostname;
 109         char *llmnr_hostname;
 110         char *mdns_hostname;
 111         DnsResourceKey *llmnr_host_ipv4_key;
 112         DnsResourceKey *llmnr_host_ipv6_key;
 113         DnsResourceKey *mdns_host_ipv4_key;
 114         DnsResourceKey *mdns_host_ipv6_key;
 115
 116         /* Watch the system hostname */
 117         int hostname_fd;
 118         sd_event_source *hostname_event_source;
 119
 120         sd_event_source *sigusr1_event_source;
 121         sd_event_source *sigusr2_event_source;
 122         sd_event_source *sigrtmin1_event_source;
 123
 124         unsigned n_transactions_total;
 125         unsigned n_dnssec_verdict[_DNSSEC_VERDICT_MAX];
 126
 127         /* Data from /etc/hosts */
 128         EtcHosts etc_hosts;
 129         usec_t etc_hosts_last, etc_hosts_mtime;
 130         bool read_etc_hosts;
 131
 132         /* Local DNS stub on 127.0.0.53:53 */
 133         int dns_stub_udp_fd;
 134         int dns_stub_tcp_fd;
 135
 136         sd_event_source *dns_stub_udp_event_source;
 137         sd_event_source *dns_stub_tcp_event_source;
 138
 139         Hashmap *polkit_registry;
 140 };
 141
 142 /* Manager */
 143
 144 int manager_new(Manager **ret);
 145 Manager* manager_free(Manager *m);
 146
 147 int manager_start(Manager *m);
 148
 149 uint32_t manager_find_mtu(Manager *m);
 150
 151 int manager_write(Manager *m, int fd, DnsPacket *p);
 152 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);
 153 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 154
 155 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 156 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 157
 158 void manager_refresh_rrs(Manager *m);
 159 int manager_next_hostname(Manager *m);
 160
 161 bool manager_our_packet(Manager *m, DnsPacket *p);
 162 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 163
 164 void manager_verify_all(Manager *m);
 165
 166 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 167
 168 #define EXTRA_CMSG_SPACE 1024
 169
 170 int manager_is_own_hostname(Manager *m, const char *name);
 171
 172 int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
 173 int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route);
 174
 175 DnssecMode manager_get_dnssec_mode(Manager *m);
 176 bool manager_dnssec_supported(Manager *m);
 177
 178 DnsOverTlsMode manager_get_dns_over_tls_mode(Manager *m);
 179
 180 void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key);
 181
 182 bool manager_routable(Manager *m, int family);
 183
 184 void manager_flush_caches(Manager *m);
 185 void manager_reset_server_features(Manager *m);
 186
 187 void manager_cleanup_saved_user(Manager *m);
 188
 189 bool manager_next_dnssd_names(Manager *m);