src/resolve/resolved-dns-scope.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright 2014 Lennart Poettering
   8 ***/
   9
  10 #include "list.h"
  11
  12 typedef struct DnsScope DnsScope;
  13
  14 #include "resolved-dns-cache.h"
  15 #include "resolved-dns-dnssec.h"
  16 #include "resolved-dns-packet.h"
  17 #include "resolved-dns-query.h"
  18 #include "resolved-dns-search-domain.h"
  19 #include "resolved-dns-server.h"
  20 #include "resolved-dns-stream.h"
  21 #include "resolved-dns-zone.h"
  22 #include "resolved-link.h"
  23
  24 typedef enum DnsScopeMatch {
  25         DNS_SCOPE_NO,
  26         DNS_SCOPE_MAYBE,
  27         DNS_SCOPE_YES,
  28         _DNS_SCOPE_MATCH_MAX,
  29         _DNS_SCOPE_INVALID = -1
  30 } DnsScopeMatch;
  31
  32 struct DnsScope {
  33         Manager *manager;
  34
  35         DnsProtocol protocol;
  36         int family;
  37         DnssecMode dnssec_mode;
  38
  39         Link *link;
  40
  41         DnsCache cache;
  42         DnsZone zone;
  43
  44         OrderedHashmap *conflict_queue;
  45         sd_event_source *conflict_event_source;
  46
  47         bool announced:1;
  48         sd_event_source *announce_event_source;
  49
  50         RateLimit ratelimit;
  51
  52         usec_t resend_timeout;
  53         usec_t max_rtt;
  54
  55         LIST_HEAD(DnsQueryCandidate, query_candidates);
  56
  57         /* Note that we keep track of ongoing transactions in two
  58          * ways: once in a hashmap, indexed by the rr key, and once in
  59          * a linked list. We use the hashmap to quickly find
  60          * transactions we can reuse for a key. But note that there
  61          * might be multiple transactions for the same key (because
  62          * the zone probing can't reuse a transaction answered from
  63          * the zone or the cache), and the hashmap only tracks the
  64          * most recent entry. */
  65         Hashmap *transactions_by_key;
  66         LIST_HEAD(DnsTransaction, transactions);
  67
  68         LIST_FIELDS(DnsScope, scopes);
  69 };
  70
  71 int dns_scope_new(Manager *m, DnsScope **ret, Link *l, DnsProtocol p, int family);
  72 DnsScope* dns_scope_free(DnsScope *s);
  73
  74 void dns_scope_packet_received(DnsScope *s, usec_t rtt);
  75 void dns_scope_packet_lost(DnsScope *s, usec_t usec);
  76
  77 int dns_scope_emit_udp(DnsScope *s, int fd, DnsPacket *p);
  78 int dns_scope_socket_tcp(DnsScope *s, int family, const union in_addr_union *address, DnsServer *server, uint16_t port);
  79 int dns_scope_socket_udp(DnsScope *s, DnsServer *server, uint16_t port);
  80
  81 DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, const char *domain);
  82 bool dns_scope_good_key(DnsScope *s, const DnsResourceKey *key);
  83
  84 DnsServer *dns_scope_get_dns_server(DnsScope *s);
  85 unsigned dns_scope_get_n_dns_servers(DnsScope *s);
  86 void dns_scope_next_dns_server(DnsScope *s);
  87
  88 int dns_scope_llmnr_membership(DnsScope *s, bool b);
  89 int dns_scope_mdns_membership(DnsScope *s, bool b);
  90
  91 int dns_scope_make_reply_packet(DnsScope *s, uint16_t id, int rcode, DnsQuestion *q, DnsAnswer *answer, DnsAnswer *soa, bool tentative, DnsPacket **ret);
  92 void dns_scope_process_query(DnsScope *s, DnsStream *stream, DnsPacket *p);
  93
  94 DnsTransaction *dns_scope_find_transaction(DnsScope *scope, DnsResourceKey *key, bool cache_ok);
  95
  96 int dns_scope_notify_conflict(DnsScope *scope, DnsResourceRecord *rr);
  97 void dns_scope_check_conflicts(DnsScope *scope, DnsPacket *p);
  98
  99 void dns_scope_dump(DnsScope *s, FILE *f);
 100
 101 DnsSearchDomain *dns_scope_get_search_domains(DnsScope *s);
 102
 103 bool dns_scope_name_needs_search_domain(DnsScope *s, const char *name);
 104
 105 bool dns_scope_network_good(DnsScope *s);
 106
 107 int dns_scope_ifindex(DnsScope *s);
 108
 109 int dns_scope_announce(DnsScope *scope, bool goodbye);
 110
 111 int dns_scope_add_dnssd_services(DnsScope *scope);
 112
 113 int dns_scope_remove_dnssd_services(DnsScope *scope);