src/resolve/resolved-dns-scope.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 #include "list.h"
   5
   6 typedef struct DnsScope DnsScope;
   7
   8 #include "resolved-dns-cache.h"
   9 #include "resolved-dns-dnssec.h"
  10 #include "resolved-dns-packet.h"
  11 #include "resolved-dns-query.h"
  12 #include "resolved-dns-search-domain.h"
  13 #include "resolved-dns-server.h"
  14 #include "resolved-dns-stream.h"
  15 #include "resolved-dns-zone.h"
  16 #include "resolved-link.h"
  17
  18 typedef enum DnsScopeMatch {
  19         DNS_SCOPE_NO,
  20         DNS_SCOPE_MAYBE,
  21         DNS_SCOPE_YES,
  22         _DNS_SCOPE_MATCH_MAX,
  23         _DNS_SCOPE_MATCH_INVALID = -1
  24 } DnsScopeMatch;
  25
  26 struct DnsScope {
  27         Manager *manager;
  28
  29         DnsProtocol protocol;
  30         int family;
  31         DnssecMode dnssec_mode;
  32         DnsOverTlsMode dns_over_tls_mode;
  33
  34         Link *link;
  35
  36         DnsCache cache;
  37         DnsZone zone;
  38
  39         OrderedHashmap *conflict_queue;
  40         sd_event_source *conflict_event_source;
  41
  42         bool announced:1;
  43         sd_event_source *announce_event_source;
  44
  45         RateLimit ratelimit;
  46
  47         usec_t resend_timeout;
  48         usec_t max_rtt;
  49
  50         LIST_HEAD(DnsQueryCandidate, query_candidates);
  51
  52         /* Note that we keep track of ongoing transactions in two
  53          * ways: once in a hashmap, indexed by the rr key, and once in
  54          * a linked list. We use the hashmap to quickly find
  55          * transactions we can reuse for a key. But note that there
  56          * might be multiple transactions for the same key (because
  57          * the zone probing can't reuse a transaction answered from
  58          * the zone or the cache), and the hashmap only tracks the
  59          * most recent entry. */
  60         Hashmap *transactions_by_key;
  61         LIST_HEAD(DnsTransaction, transactions);
  62
  63         LIST_FIELDS(DnsScope, scopes);
  64 };
  65
  66 int dns_scope_new(Manager *m, DnsScope **ret, Link *l, DnsProtocol p, int family);
  67 DnsScope* dns_scope_free(DnsScope *s);
  68
  69 void dns_scope_packet_received(DnsScope *s, usec_t rtt);
  70 void dns_scope_packet_lost(DnsScope *s, usec_t usec);
  71
  72 int dns_scope_emit_udp(DnsScope *s, int fd, DnsPacket *p);
  73 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);
  74 int dns_scope_socket_udp(DnsScope *s, DnsServer *server, uint16_t port);
  75
  76 DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, const char *domain);
  77 bool dns_scope_good_key(DnsScope *s, const DnsResourceKey *key);
  78
  79 DnsServer *dns_scope_get_dns_server(DnsScope *s);
  80 unsigned dns_scope_get_n_dns_servers(DnsScope *s);
  81 void dns_scope_next_dns_server(DnsScope *s);
  82
  83 int dns_scope_llmnr_membership(DnsScope *s, bool b);
  84 int dns_scope_mdns_membership(DnsScope *s, bool b);
  85
  86 int dns_scope_make_reply_packet(DnsScope *s, uint16_t id, int rcode, DnsQuestion *q, DnsAnswer *answer, DnsAnswer *soa, bool tentative, DnsPacket **ret);
  87 void dns_scope_process_query(DnsScope *s, DnsStream *stream, DnsPacket *p);
  88
  89 DnsTransaction *dns_scope_find_transaction(DnsScope *scope, DnsResourceKey *key, bool cache_ok);
  90
  91 int dns_scope_notify_conflict(DnsScope *scope, DnsResourceRecord *rr);
  92 void dns_scope_check_conflicts(DnsScope *scope, DnsPacket *p);
  93
  94 void dns_scope_dump(DnsScope *s, FILE *f);
  95
  96 DnsSearchDomain *dns_scope_get_search_domains(DnsScope *s);
  97
  98 bool dns_scope_name_needs_search_domain(DnsScope *s, const char *name);
  99
 100 bool dns_scope_network_good(DnsScope *s);
 101
 102 int dns_scope_ifindex(DnsScope *s);
 103
 104 int dns_scope_announce(DnsScope *scope, bool goodbye);
 105
 106 int dns_scope_add_dnssd_services(DnsScope *scope);
 107
 108 int dns_scope_remove_dnssd_services(DnsScope *scope);