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-link.h"
  22
  23 #define MANAGER_SEARCH_DOMAINS_MAX 32
  24 #define MANAGER_DNS_SERVERS_MAX 32
  25
  26 typedef struct EtcHosts {
  27         Hashmap *by_address;
  28         Hashmap *by_name;
  29         Set *no_address;
  30 } EtcHosts;
  31
  32 struct Manager {
  33         sd_event *event;
  34
  35         ResolveSupport llmnr_support;
  36         ResolveSupport mdns_support;
  37         DnssecMode dnssec_mode;
  38         DnsOverTlsMode dns_over_tls_mode;
  39         bool enable_cache;
  40         DnsStubListenerMode dns_stub_listener_mode;
  41
  42         /* Network */
  43         Hashmap *links;
  44
  45         sd_netlink *rtnl;
  46         sd_event_source *rtnl_event_source;
  47
  48         sd_network_monitor *network_monitor;
  49         sd_event_source *network_event_source;
  50
  51         /* DNS query management */
  52         Hashmap *dns_transactions;
  53         LIST_HEAD(DnsQuery, dns_queries);
  54         unsigned n_dns_queries;
  55
  56         LIST_HEAD(DnsStream, dns_streams);
  57         unsigned n_dns_streams;
  58
  59         /* Unicast dns */
  60         LIST_HEAD(DnsServer, dns_servers);
  61         LIST_HEAD(DnsServer, fallback_dns_servers);
  62         unsigned n_dns_servers; /* counts both main and fallback */
  63         DnsServer *current_dns_server;
  64
  65         LIST_HEAD(DnsSearchDomain, search_domains);
  66         unsigned n_search_domains;
  67
  68         bool need_builtin_fallbacks:1;
  69
  70         bool read_resolv_conf:1;
  71         usec_t resolv_conf_mtime;
  72
  73         DnsTrustAnchor trust_anchor;
  74
  75         LIST_HEAD(DnsScope, dns_scopes);
  76         DnsScope *unicast_scope;
  77
  78         /* LLMNR */
  79         int llmnr_ipv4_udp_fd;
  80         int llmnr_ipv6_udp_fd;
  81         int llmnr_ipv4_tcp_fd;
  82         int llmnr_ipv6_tcp_fd;
  83
  84         sd_event_source *llmnr_ipv4_udp_event_source;
  85         sd_event_source *llmnr_ipv6_udp_event_source;
  86         sd_event_source *llmnr_ipv4_tcp_event_source;
  87         sd_event_source *llmnr_ipv6_tcp_event_source;
  88
  89         /* mDNS */
  90         int mdns_ipv4_fd;
  91         int mdns_ipv6_fd;
  92
  93         /* DNS-SD */
  94         Hashmap *dnssd_services;
  95
  96         sd_event_source *mdns_ipv4_event_source;
  97         sd_event_source *mdns_ipv6_event_source;
  98
  99         /* dbus */
 100         sd_bus *bus;
 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         sd_event_source *sigusr1_event_source;
 116         sd_event_source *sigusr2_event_source;
 117         sd_event_source *sigrtmin1_event_source;
 118
 119         unsigned n_transactions_total;
 120         unsigned n_dnssec_verdict[_DNSSEC_VERDICT_MAX];
 121
 122         /* Data from /etc/hosts */
 123         EtcHosts etc_hosts;
 124         usec_t etc_hosts_last, etc_hosts_mtime;
 125         bool read_etc_hosts;
 126
 127         /* Local DNS stub on 127.0.0.53:53 */
 128         int dns_stub_udp_fd;
 129         int dns_stub_tcp_fd;
 130
 131         sd_event_source *dns_stub_udp_event_source;
 132         sd_event_source *dns_stub_tcp_event_source;
 133
 134         Hashmap *polkit_registry;
 135 };
 136
 137 /* Manager */
 138
 139 int manager_new(Manager **ret);
 140 Manager* manager_free(Manager *m);
 141
 142 int manager_start(Manager *m);
 143
 144 uint32_t manager_find_mtu(Manager *m);
 145
 146 int manager_write(Manager *m, int fd, DnsPacket *p);
 147 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);
 148 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 149
 150 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 151 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 152
 153 void manager_refresh_rrs(Manager *m);
 154 int manager_next_hostname(Manager *m);
 155
 156 bool manager_our_packet(Manager *m, DnsPacket *p);
 157 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 158
 159 void manager_verify_all(Manager *m);
 160
 161 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 162
 163 #define EXTRA_CMSG_SPACE 1024
 164
 165 int manager_is_own_hostname(Manager *m, const char *name);
 166
 167 int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
 168 int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route);
 169
 170 DnssecMode manager_get_dnssec_mode(Manager *m);
 171 bool manager_dnssec_supported(Manager *m);
 172
 173 DnsOverTlsMode manager_get_dns_over_tls_mode(Manager *m);
 174
 175 void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key);
 176
 177 bool manager_routable(Manager *m, int family);
 178
 179 void manager_flush_caches(Manager *m);
 180 void manager_reset_server_features(Manager *m);
 181
 182 void manager_cleanup_saved_user(Manager *m);
 183
 184 bool manager_next_dnssd_names(Manager *m);