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         PrivateDnsMode private_dns_mode;
  39
  40         Link *link;
  41
  42         DnsCache cache;
  43         DnsZone zone;
  44
  45         OrderedHashmap *conflict_queue;
  46         sd_event_source *conflict_event_source;
  47
  48         bool announced:1;
  49         sd_event_source *announce_event_source;
  50
  51         RateLimit ratelimit;
  52
  53         usec_t resend_timeout;
  54         usec_t max_rtt;
  55
  56         LIST_HEAD(DnsQueryCandidate, query_candidates);
  57
  58         /* Note that we keep track of ongoing transactions in two
  59          * ways: once in a hashmap, indexed by the rr key, and once in
  60          * a linked list. We use the hashmap to quickly find
  61          * transactions we can reuse for a key. But note that there
  62          * might be multiple transactions for the same key (because
  63          * the zone probing can't reuse a transaction answered from
  64          * the zone or the cache), and the hashmap only tracks the
  65          * most recent entry. */
  66         Hashmap *transactions_by_key;
  67         LIST_HEAD(DnsTransaction, transactions);
  68
  69         LIST_FIELDS(DnsScope, scopes);
  70 };
  71
  72 int dns_scope_new(Manager *m, DnsScope **ret, Link *l, DnsProtocol p, int family);
  73 DnsScope* dns_scope_free(DnsScope *s);
  74
  75 void dns_scope_packet_received(DnsScope *s, usec_t rtt);
  76 void dns_scope_packet_lost(DnsScope *s, usec_t usec);
  77
  78 int dns_scope_emit_udp(DnsScope *s, int fd, DnsPacket *p);
  79 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);
  80 int dns_scope_socket_udp(DnsScope *s, DnsServer *server, uint16_t port);
  81
  82 DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, const char *domain);
  83 bool dns_scope_good_key(DnsScope *s, const DnsResourceKey *key);
  84
  85 DnsServer *dns_scope_get_dns_server(DnsScope *s);
  86 unsigned dns_scope_get_n_dns_servers(DnsScope *s);
  87 void dns_scope_next_dns_server(DnsScope *s);
  88
  89 int dns_scope_llmnr_membership(DnsScope *s, bool b);
  90 int dns_scope_mdns_membership(DnsScope *s, bool b);
  91
  92 int dns_scope_make_reply_packet(DnsScope *s, uint16_t id, int rcode, DnsQuestion *q, DnsAnswer *answer, DnsAnswer *soa, bool tentative, DnsPacket **ret);
  93 void dns_scope_process_query(DnsScope *s, DnsStream *stream, DnsPacket *p);
  94
  95 DnsTransaction *dns_scope_find_transaction(DnsScope *scope, DnsResourceKey *key, bool cache_ok);
  96
  97 int dns_scope_notify_conflict(DnsScope *scope, DnsResourceRecord *rr);
  98 void dns_scope_check_conflicts(DnsScope *scope, DnsPacket *p);
  99
 100 void dns_scope_dump(DnsScope *s, FILE *f);
 101
 102 DnsSearchDomain *dns_scope_get_search_domains(DnsScope *s);
 103
 104 bool dns_scope_name_needs_search_domain(DnsScope *s, const char *name);
 105
 106 bool dns_scope_network_good(DnsScope *s);
 107
 108 int dns_scope_ifindex(DnsScope *s);
 109
 110 int dns_scope_announce(DnsScope *scope, bool goodbye);
 111
 112 int dns_scope_add_dnssd_services(DnsScope *scope);
 113
 114 int dns_scope_remove_dnssd_services(DnsScope *scope);