[thirdparty/systemd.git] / src / resolve / resolved-manager.h

/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once

#include <sys/stat.h>

#include "common-signal.h"
#include "list.h"
#include "resolve-util.h"
#include "resolved-dns-browse-services.h"
#include "resolved-dns-dnssec.h"
#include "resolved-dns-stream.h"
#include "resolved-dns-stub.h"
#include "resolved-dns-trust-anchor.h"
#include "resolved-etc-hosts.h"
#include "resolved-forward.h"

#define MANAGER_SEARCH_DOMAINS_MAX 1024
#define MANAGER_DNS_SERVERS_MAX 256

typedef 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;

        Hashmap *delegates; /* id string → DnsDelegate objects */

        /* 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_registered_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;

        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;

        /* List of refused DNS Record Types*/
        Set *refuse_record_types;

        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;

        sd_varlink_server *varlink_server;
        sd_varlink_server *varlink_monitor_server;

        Set *varlink_query_results_subscription;
        Set *varlink_dns_configuration_subscription;

        sd_json_variant *dns_configuration_json;

        sd_netlink_slot *netlink_new_route_slot;
        sd_netlink_slot *netlink_del_route_slot;

        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;

        /* Map varlink links to DnsServiceBrowser instances. */
        Hashmap *dns_service_browsers;
} Manager;

/* 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, DnsQuery *q);

int sendmsg_loop(int fd, struct msghdr *mh, int flags);
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_from_protocol(Manager *m, int ifindex, DnsProtocol protocol, int family);

static inline DnsScope* manager_find_scope(Manager *m, DnsPacket *p) {
        assert(m);
        assert(p);
        return manager_find_scope_from_protocol(m, p->ifindex, p->protocol, p->family);
}

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, sd_json_variant **ret);

void dns_manager_reset_statistics(Manager *m);

int manager_dump_dns_configuration_json(Manager *m, sd_json_variant **ret);
int manager_send_dns_configuration_changed(Manager *m, Link *l, bool reset);

int manager_start_dns_configuration_monitor(Manager *m);
void manager_stop_dns_configuration_monitor(Manager *m);
Commit	Line	Data
	1	/* SPDX-License-Identifier: LGPL-2.1-or-later */
	2	#pragma once
	3
	4	#include <sys/stat.h>
	5
	6	#include "common-signal.h"
	7	#include "list.h"
	8	#include "resolve-util.h"
	9	#include "resolved-dns-browse-services.h"
	10	#include "resolved-dns-dnssec.h"
	11	#include "resolved-dns-stream.h"
	12	#include "resolved-dns-stub.h"
	13	#include "resolved-dns-trust-anchor.h"
	14	#include "resolved-etc-hosts.h"
	15	#include "resolved-forward.h"
	16
	17	#define MANAGER_SEARCH_DOMAINS_MAX 1024
	18	#define MANAGER_DNS_SERVERS_MAX 256
	19
	20	typedef struct Manager {
	21	sd_event *event;
	22
	23	ResolveSupport llmnr_support;
	24	ResolveSupport mdns_support;
	25	DnssecMode dnssec_mode;
	26	DnsOverTlsMode dns_over_tls_mode;
	27	DnsCacheMode enable_cache;
	28	bool cache_from_localhost;
	29	DnsStubListenerMode dns_stub_listener_mode;
	30	usec_t stale_retention_usec;
	31
	32	#if ENABLE_DNS_OVER_TLS
	33	DnsTlsManagerData dnstls_data;
	34	#endif
	35
	36	/* Network */
	37	Hashmap *links;
	38
	39	sd_netlink *rtnl;
	40	sd_event_source *rtnl_event_source;
	41
	42	sd_network_monitor *network_monitor;
	43	sd_event_source *network_event_source;
	44
	45	/* DNS query management */
	46	Hashmap *dns_transactions;
	47	LIST_HEAD(DnsQuery, dns_queries);
	48	unsigned n_dns_queries;
	49	Hashmap *stub_queries_by_packet;
	50
	51	LIST_HEAD(DnsStream, dns_streams);
	52	unsigned n_dns_streams[_DNS_STREAM_TYPE_MAX];
	53
	54	/* Unicast dns */
	55	LIST_HEAD(DnsServer, dns_servers);
	56	LIST_HEAD(DnsServer, fallback_dns_servers);
	57	unsigned n_dns_servers; /* counts both main and fallback */
	58	DnsServer *current_dns_server;
	59
	60	LIST_HEAD(DnsSearchDomain, search_domains);
	61	unsigned n_search_domains;
	62
	63	bool need_builtin_fallbacks;
	64	bool read_resolv_conf;
	65	bool resolve_unicast_single_label;
	66
	67	struct stat resolv_conf_stat;
	68
	69	DnsTrustAnchor trust_anchor;
	70
	71	LIST_HEAD(DnsScope, dns_scopes);
	72	DnsScope *unicast_scope;
	73
	74	Hashmap delegates; / id string → DnsDelegate objects */
	75
	76	/* LLMNR */
	77	int llmnr_ipv4_udp_fd;
	78	int llmnr_ipv6_udp_fd;
	79	int llmnr_ipv4_tcp_fd;
	80	int llmnr_ipv6_tcp_fd;
	81
	82	sd_event_source *llmnr_ipv4_udp_event_source;
	83	sd_event_source *llmnr_ipv6_udp_event_source;
	84	sd_event_source *llmnr_ipv4_tcp_event_source;
	85	sd_event_source *llmnr_ipv6_tcp_event_source;
	86
	87	/* mDNS */
	88	int mdns_ipv4_fd;
	89	int mdns_ipv6_fd;
	90	sd_event_source *mdns_ipv4_event_source;
	91	sd_event_source *mdns_ipv6_event_source;
	92
	93	/* DNS-SD */
	94	Hashmap *dnssd_registered_services;
	95
	96	/* dbus */
	97	sd_bus *bus;
	98
	99	/* The hostname we publish on LLMNR and mDNS */
	100	char *full_hostname;
	101	char *llmnr_hostname;
	102	char *mdns_hostname;
	103	DnsResourceKey *llmnr_host_ipv4_key;
	104	DnsResourceKey *llmnr_host_ipv6_key;
	105	DnsResourceKey *mdns_host_ipv4_key;
	106	DnsResourceKey *mdns_host_ipv6_key;
	107
	108	/* Watch the system hostname */
	109	int hostname_fd;
	110	sd_event_source *hostname_event_source;
	111
	112	unsigned n_transactions_total;
	113	unsigned n_timeouts_total;
	114	unsigned n_timeouts_served_stale_total;
	115	unsigned n_failure_responses_total;
	116	unsigned n_failure_responses_served_stale_total;
	117
	118	unsigned n_dnssec_verdict[_DNSSEC_VERDICT_MAX];
	119
	120	/* Data from /etc/hosts */
	121	EtcHosts etc_hosts;
	122	usec_t etc_hosts_last;
	123	struct stat etc_hosts_stat;
	124	bool read_etc_hosts;
	125
	126	/* List of refused DNS Record Types*/
	127	Set *refuse_record_types;
	128
	129	OrderedSet *dns_extra_stub_listeners;
	130
	131	/* Local DNS stub on 127.0.0.53:53 */
	132	sd_event_source *dns_stub_udp_event_source;
	133	sd_event_source *dns_stub_tcp_event_source;
	134
	135	/* Local DNS proxy stub on 127.0.0.54:53 */
	136	sd_event_source *dns_proxy_stub_udp_event_source;
	137	sd_event_source *dns_proxy_stub_tcp_event_source;
	138
	139	Hashmap *polkit_registry;
	140
	141	sd_varlink_server *varlink_server;
	142	sd_varlink_server *varlink_monitor_server;
	143
	144	Set *varlink_query_results_subscription;
	145	Set *varlink_dns_configuration_subscription;
	146
	147	sd_json_variant *dns_configuration_json;
	148
	149	sd_netlink_slot *netlink_new_route_slot;
	150	sd_netlink_slot *netlink_del_route_slot;
	151
	152	sd_event_source *clock_change_event_source;
	153
	154	LIST_HEAD(SocketGraveyard, socket_graveyard);
	155	SocketGraveyard *socket_graveyard_oldest;
	156	size_t n_socket_graveyard;
	157
	158	struct sigrtmin18_info sigrtmin18_info;
	159
	160	/* Map varlink links to DnsServiceBrowser instances. */
	161	Hashmap *dns_service_browsers;
	162	} Manager;
	163
	164	/* Manager */
	165
	166	int manager_new(Manager **ret);
	167	Manager* manager_free(Manager *m);
	168
	169	int manager_start(Manager *m);
	170
	171	uint32_t manager_find_mtu(Manager *m);
	172
	173	int manager_monitor_send(Manager m, DnsQuery q);
	174
	175	int sendmsg_loop(int fd, struct msghdr *mh, int flags);
	176	int manager_write(Manager m, int fd, DnsPacket p);
	177	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);
	178	int manager_recv(Manager m, int fd, DnsProtocol protocol, DnsPacket *ret);
	179
	180	int manager_find_ifindex(Manager m, int family, const union in_addr_union in_addr);
	181	LinkAddress* manager_find_link_address(Manager m, int family, const union in_addr_union in_addr);
	182
	183	void manager_refresh_rrs(Manager *m);
	184	int manager_next_hostname(Manager *m);
	185
	186	bool manager_packet_from_local_address(Manager m, DnsPacket p);
	187	bool manager_packet_from_our_transaction(Manager m, DnsPacket p);
	188
	189	DnsScope* manager_find_scope_from_protocol(Manager *m, int ifindex, DnsProtocol protocol, int family);
	190
	191	static inline DnsScope* manager_find_scope(Manager m, DnsPacket p) {
	192	assert(m);
	193	assert(p);
	194	return manager_find_scope_from_protocol(m, p->ifindex, p->protocol, p->family);
	195	}
	196
	197	void manager_verify_all(Manager *m);
	198
	199	DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
	200
	201	/* For some reason we need some extra cmsg space on some kernels/archs. One of those days we need to figure out why */
	202	#define EXTRA_CMSG_SPACE 1024
	203
	204	int manager_is_own_hostname(Manager m, const char name);
	205
	206	int manager_compile_dns_servers(Manager m, OrderedSet *servers);
	207	int manager_compile_search_domains(Manager m, OrderedSet *domains, int filter_route);
	208
	209	DnssecMode manager_get_dnssec_mode(Manager *m);
	210	bool manager_dnssec_supported(Manager *m);
	211
	212	DnsOverTlsMode manager_get_dns_over_tls_mode(Manager *m);
	213
	214	void manager_dnssec_verdict(Manager m, DnssecVerdict verdict, const DnsResourceKey key);
	215
	216	bool manager_routable(Manager *m);
	217
	218	void manager_flush_caches(Manager *m, int log_level);
	219	void manager_reset_server_features(Manager *m);
	220
	221	void manager_cleanup_saved_user(Manager *m);
	222
	223	bool manager_next_dnssd_names(Manager *m);
	224
	225	bool manager_server_is_stub(Manager m, DnsServer s);
	226
	227	int socket_disable_pmtud(int fd, int af);
	228
	229	int dns_manager_dump_statistics_json(Manager m, sd_json_variant *ret);
	230
	231	void dns_manager_reset_statistics(Manager *m);
	232
	233	int manager_dump_dns_configuration_json(Manager m, sd_json_variant *ret);
	234	int manager_send_dns_configuration_changed(Manager m, Link l, bool reset);
	235
	236	int manager_start_dns_configuration_monitor(Manager *m);
	237	void manager_stop_dns_configuration_monitor(Manager *m);