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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include "list.h"
#include "ratelimit.h"
typedef struct DnsQueryCandidate DnsQueryCandidate;
typedef struct DnsScope DnsScope;
#include "resolved-dns-cache.h"
#include "resolved-dns-dnssec.h"
#include "resolved-dns-packet.h"
#include "resolved-dns-query.h"
#include "resolved-dns-search-domain.h"
#include "resolved-dns-server.h"
#include "resolved-dns-stream.h"
#include "resolved-dns-zone.h"
typedef enum DnsScopeMatch {
DNS_SCOPE_NO,
DNS_SCOPE_LAST_RESORT,
DNS_SCOPE_MAYBE,
DNS_SCOPE_YES_BASE, /* Add the number of matching labels to this */
DNS_SCOPE_YES_END = DNS_SCOPE_YES_BASE + DNS_N_LABELS_MAX,
_DNS_SCOPE_MATCH_MAX,
_DNS_SCOPE_MATCH_INVALID = -EINVAL,
} DnsScopeMatch;
struct DnsScope {
Manager *manager;
DnsProtocol protocol;
int family;
/* Copied at scope creation time from the link/manager */
DnssecMode dnssec_mode;
DnsOverTlsMode dns_over_tls_mode;
Link *link;
DnsCache cache;
DnsZone zone;
OrderedHashmap *conflict_queue;
sd_event_source *conflict_event_source;
sd_event_source *announce_event_source;
RateLimit ratelimit;
usec_t resend_timeout;
usec_t max_rtt;
LIST_HEAD(DnsQueryCandidate, query_candidates);
/* Note that we keep track of ongoing transactions in two ways: once in a hashmap, indexed by the rr
* key, and once in a linked list. We use the hashmap to quickly find transactions we can reuse for a
* key. But note that there might be multiple transactions for the same key (because the associated
* query flags might differ in incompatible ways: e.g. we may not reuse a non-validating transaction
* as validating. Hence we maintain a per-key list of transactions, which we iterate through to find
* one we can reuse with matching flags. */
Hashmap *transactions_by_key;
LIST_HEAD(DnsTransaction, transactions);
LIST_FIELDS(DnsScope, scopes);
bool announced;
};
int dns_scope_new(Manager *m, DnsScope **ret, Link *l, DnsProtocol p, int family);
DnsScope* dns_scope_free(DnsScope *s);
void dns_scope_packet_received(DnsScope *s, usec_t rtt);
void dns_scope_packet_lost(DnsScope *s, usec_t usec);
int dns_scope_emit_udp(DnsScope *s, int fd, int af, DnsPacket *p);
int dns_scope_socket_tcp(DnsScope *s, int family, const union in_addr_union *address, DnsServer *server, uint16_t port, union sockaddr_union *ret_socket_address);
int dns_scope_socket_udp(DnsScope *s, DnsServer *server);
DnsScopeMatch dns_scope_good_domain(DnsScope *s, DnsQuery *q);
bool dns_scope_good_key(DnsScope *s, const DnsResourceKey *key);
DnsServer *dns_scope_get_dns_server(DnsScope *s);
unsigned dns_scope_get_n_dns_servers(DnsScope *s);
void dns_scope_next_dns_server(DnsScope *s, DnsServer *if_current);
int dns_scope_llmnr_membership(DnsScope *s, bool b);
int dns_scope_mdns_membership(DnsScope *s, bool b);
int dns_scope_make_reply_packet(DnsScope *s, uint16_t id, int rcode, DnsQuestion *q, DnsAnswer *answer, DnsAnswer *soa, bool tentative, DnsPacket **ret);
void dns_scope_process_query(DnsScope *s, DnsStream *stream, DnsPacket *p);
DnsTransaction *dns_scope_find_transaction(DnsScope *scope, DnsResourceKey *key, uint64_t query_flags);
int dns_scope_notify_conflict(DnsScope *scope, DnsResourceRecord *rr);
void dns_scope_check_conflicts(DnsScope *scope, DnsPacket *p);
void dns_scope_dump(DnsScope *s, FILE *f);
DnsSearchDomain *dns_scope_get_search_domains(DnsScope *s);
bool dns_scope_name_wants_search_domain(DnsScope *s, const char *name);
bool dns_scope_network_good(DnsScope *s);
int dns_scope_ifindex(DnsScope *s);
int dns_scope_announce(DnsScope *scope, bool goodbye);
int dns_scope_add_dnssd_services(DnsScope *scope);
int dns_scope_remove_dnssd_services(DnsScope *scope);
bool dns_scope_is_default_route(DnsScope *scope);
int dns_scope_dump_cache_to_json(DnsScope *scope, JsonVariant **ret);
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