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_BASE, /* Add the number of matching labels to this */
  22         DNS_SCOPE_YES_END = DNS_SCOPE_YES_BASE + DNS_N_LABELS_MAX,
  23         _DNS_SCOPE_MATCH_MAX,
  24         _DNS_SCOPE_MATCH_INVALID = -1
  25 } DnsScopeMatch;
  26
  27 struct DnsScope {
  28         Manager *manager;
  29
  30         DnsProtocol protocol;
  31         int family;
  32
  33         /* Copied at scope creation time from the link/manager */
  34         DnssecMode dnssec_mode;
  35         DnsOverTlsMode dns_over_tls_mode;
  36
  37         Link *link;
  38
  39         DnsCache cache;
  40         DnsZone zone;
  41
  42         OrderedHashmap *conflict_queue;
  43         sd_event_source *conflict_event_source;
  44
  45         bool announced:1;
  46         sd_event_source *announce_event_source;
  47
  48         RateLimit ratelimit;
  49
  50         usec_t resend_timeout;
  51         usec_t max_rtt;
  52
  53         LIST_HEAD(DnsQueryCandidate, query_candidates);
  54
  55         /* Note that we keep track of ongoing transactions in two
  56          * ways: once in a hashmap, indexed by the rr key, and once in
  57          * a linked list. We use the hashmap to quickly find
  58          * transactions we can reuse for a key. But note that there
  59          * might be multiple transactions for the same key (because
  60          * the zone probing can't reuse a transaction answered from
  61          * the zone or the cache), and the hashmap only tracks the
  62          * most recent entry. */
  63         Hashmap *transactions_by_key;
  64         LIST_HEAD(DnsTransaction, transactions);
  65
  66         LIST_FIELDS(DnsScope, scopes);
  67 };
  68
  69 int dns_scope_new(Manager *m, DnsScope **ret, Link *l, DnsProtocol p, int family);
  70 DnsScope* dns_scope_free(DnsScope *s);
  71
  72 void dns_scope_packet_received(DnsScope *s, usec_t rtt);
  73 void dns_scope_packet_lost(DnsScope *s, usec_t usec);
  74
  75 int dns_scope_emit_udp(DnsScope *s, int fd, DnsPacket *p);
  76 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);
  77 int dns_scope_socket_udp(DnsScope *s, DnsServer *server, uint16_t port);
  78
  79 DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, const char *domain);
  80 bool dns_scope_good_key(DnsScope *s, const DnsResourceKey *key);
  81
  82 DnsServer *dns_scope_get_dns_server(DnsScope *s);
  83 unsigned dns_scope_get_n_dns_servers(DnsScope *s);
  84 void dns_scope_next_dns_server(DnsScope *s);
  85
  86 int dns_scope_llmnr_membership(DnsScope *s, bool b);
  87 int dns_scope_mdns_membership(DnsScope *s, bool b);
  88
  89 int dns_scope_make_reply_packet(DnsScope *s, uint16_t id, int rcode, DnsQuestion *q, DnsAnswer *answer, DnsAnswer *soa, bool tentative, DnsPacket **ret);
  90 void dns_scope_process_query(DnsScope *s, DnsStream *stream, DnsPacket *p);
  91
  92 DnsTransaction *dns_scope_find_transaction(DnsScope *scope, DnsResourceKey *key, bool cache_ok);
  93
  94 int dns_scope_notify_conflict(DnsScope *scope, DnsResourceRecord *rr);
  95 void dns_scope_check_conflicts(DnsScope *scope, DnsPacket *p);
  96
  97 void dns_scope_dump(DnsScope *s, FILE *f);
  98
  99 DnsSearchDomain *dns_scope_get_search_domains(DnsScope *s);
 100
 101 bool dns_scope_name_needs_search_domain(DnsScope *s, const char *name);
 102
 103 bool dns_scope_network_good(DnsScope *s);
 104
 105 int dns_scope_ifindex(DnsScope *s);
 106
 107 int dns_scope_announce(DnsScope *scope, bool goodbye);
 108
 109 int dns_scope_add_dnssd_services(DnsScope *scope);
 110 int dns_scope_remove_dnssd_services(DnsScope *scope);
 111
 112 bool dns_scope_is_default_route(DnsScope *scope);