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Diffstat (limited to 'src/resolve/resolved-manager.h')
| -rw-r--r-- | src/resolve/resolved-manager.h | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/src/resolve/resolved-manager.h b/src/resolve/resolved-manager.h new file mode 100644 index 0000000..5cd5e83 --- /dev/null +++ b/src/resolve/resolved-manager.h @@ -0,0 +1,230 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#pragma once + +#include <sys/stat.h> + +#include "sd-event.h" +#include "sd-netlink.h" +#include "sd-network.h" + +#include "common-signal.h" +#include "hashmap.h" +#include "list.h" +#include "ordered-set.h" +#include "resolve-util.h" +#include "varlink.h" + +typedef struct Manager Manager; + +#include "resolved-dns-query.h" +#include "resolved-dns-search-domain.h" +#include "resolved-dns-stream.h" +#include "resolved-dns-stub.h" +#include "resolved-dns-trust-anchor.h" +#include "resolved-link.h" +#include "resolved-socket-graveyard.h" + +#define MANAGER_SEARCH_DOMAINS_MAX 256 +#define MANAGER_DNS_SERVERS_MAX 256 + +typedef struct EtcHosts { + Hashmap *by_address; + Hashmap *by_name; + Set *no_address; +} EtcHosts; + +struct Manager { + sd_event *event; + + ResolveSupport llmnr_support; + ResolveSupport mdns_support; + DnssecMode dnssec_mode; + DnsOverTlsMode dns_over_tls_mode; + DnsCacheMode enable_cache; + bool cache_from_localhost; + DnsStubListenerMode dns_stub_listener_mode; + usec_t stale_retention_usec; + +#if ENABLE_DNS_OVER_TLS + DnsTlsManagerData dnstls_data; +#endif + + /* Network */ + Hashmap *links; + + sd_netlink *rtnl; + sd_event_source *rtnl_event_source; + + sd_network_monitor *network_monitor; + sd_event_source *network_event_source; + + /* DNS query management */ + Hashmap *dns_transactions; + LIST_HEAD(DnsQuery, dns_queries); + unsigned n_dns_queries; + Hashmap *stub_queries_by_packet; + + LIST_HEAD(DnsStream, dns_streams); + unsigned n_dns_streams[_DNS_STREAM_TYPE_MAX]; + + /* Unicast dns */ + LIST_HEAD(DnsServer, dns_servers); + LIST_HEAD(DnsServer, fallback_dns_servers); + unsigned n_dns_servers; /* counts both main and fallback */ + DnsServer *current_dns_server; + + LIST_HEAD(DnsSearchDomain, search_domains); + unsigned n_search_domains; + + bool need_builtin_fallbacks; + bool read_resolv_conf; + bool resolve_unicast_single_label; + + struct stat resolv_conf_stat; + + DnsTrustAnchor trust_anchor; + + LIST_HEAD(DnsScope, dns_scopes); + DnsScope *unicast_scope; + + /* LLMNR */ + int llmnr_ipv4_udp_fd; + int llmnr_ipv6_udp_fd; + int llmnr_ipv4_tcp_fd; + int llmnr_ipv6_tcp_fd; + + sd_event_source *llmnr_ipv4_udp_event_source; + sd_event_source *llmnr_ipv6_udp_event_source; + sd_event_source *llmnr_ipv4_tcp_event_source; + sd_event_source *llmnr_ipv6_tcp_event_source; + + /* mDNS */ + int mdns_ipv4_fd; + int mdns_ipv6_fd; + sd_event_source *mdns_ipv4_event_source; + sd_event_source *mdns_ipv6_event_source; + + /* DNS-SD */ + Hashmap *dnssd_services; + + /* dbus */ + sd_bus *bus; + + /* The hostname we publish on LLMNR and mDNS */ + char *full_hostname; + char *llmnr_hostname; + char *mdns_hostname; + DnsResourceKey *llmnr_host_ipv4_key; + DnsResourceKey *llmnr_host_ipv6_key; + DnsResourceKey *mdns_host_ipv4_key; + DnsResourceKey *mdns_host_ipv6_key; + + /* Watch the system hostname */ + int hostname_fd; + sd_event_source *hostname_event_source; + + sd_event_source *sigusr1_event_source; + sd_event_source *sigusr2_event_source; + sd_event_source *sigrtmin1_event_source; + + unsigned n_transactions_total; + unsigned n_timeouts_total; + unsigned n_timeouts_served_stale_total; + unsigned n_failure_responses_total; + unsigned n_failure_responses_served_stale_total; + + unsigned n_dnssec_verdict[_DNSSEC_VERDICT_MAX]; + + /* Data from /etc/hosts */ + EtcHosts etc_hosts; + usec_t etc_hosts_last; + struct stat etc_hosts_stat; + bool read_etc_hosts; + + OrderedSet *dns_extra_stub_listeners; + + /* Local DNS stub on 127.0.0.53:53 */ + sd_event_source *dns_stub_udp_event_source; + sd_event_source *dns_stub_tcp_event_source; + + /* Local DNS proxy stub on 127.0.0.54:53 */ + sd_event_source *dns_proxy_stub_udp_event_source; + sd_event_source *dns_proxy_stub_tcp_event_source; + + Hashmap *polkit_registry; + + VarlinkServer *varlink_server; + VarlinkServer *varlink_monitor_server; + + Set *varlink_subscription; + + sd_event_source *clock_change_event_source; + + LIST_HEAD(SocketGraveyard, socket_graveyard); + SocketGraveyard *socket_graveyard_oldest; + size_t n_socket_graveyard; + + struct sigrtmin18_info sigrtmin18_info; +}; + +/* Manager */ + +int manager_new(Manager **ret); +Manager* manager_free(Manager *m); + +int manager_start(Manager *m); + +uint32_t manager_find_mtu(Manager *m); + +int manager_monitor_send(Manager *m, int state, int rcode, int error, DnsQuestion *question_idna, DnsQuestion *question_utf8, DnsPacket *question_bypass, DnsQuestion *collected_questions, DnsAnswer *answer); + +int manager_write(Manager *m, int fd, DnsPacket *p); +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); +int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret); + +int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr); +LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr); + +void manager_refresh_rrs(Manager *m); +int manager_next_hostname(Manager *m); + +bool manager_packet_from_local_address(Manager *m, DnsPacket *p); +bool manager_packet_from_our_transaction(Manager *m, DnsPacket *p); + +DnsScope* manager_find_scope(Manager *m, DnsPacket *p); + +void manager_verify_all(Manager *m); + +DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free); + +/* For some reason we need some extra cmsg space on some kernels/archs. One of those days we need to figure out why */ +#define EXTRA_CMSG_SPACE 1024 + +int manager_is_own_hostname(Manager *m, const char *name); + +int manager_compile_dns_servers(Manager *m, OrderedSet **servers); +int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route); + +DnssecMode manager_get_dnssec_mode(Manager *m); +bool manager_dnssec_supported(Manager *m); + +DnsOverTlsMode manager_get_dns_over_tls_mode(Manager *m); + +void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key); + +bool manager_routable(Manager *m); + +void manager_flush_caches(Manager *m, int log_level); +void manager_reset_server_features(Manager *m); + +void manager_cleanup_saved_user(Manager *m); + +bool manager_next_dnssd_names(Manager *m); + +bool manager_server_is_stub(Manager *m, DnsServer *s); + +int socket_disable_pmtud(int fd, int af); + +int dns_manager_dump_statistics_json(Manager *m, JsonVariant **ret); + +void dns_manager_reset_statistics(Manager *m); |