src/resolve/resolved-dns-zone.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 #include "hashmap.h"
   5
   6 typedef struct DnsZone {
   7         Hashmap *by_key;
   8         Hashmap *by_name;
   9 } DnsZone;
  10
  11 typedef struct DnsZoneItem DnsZoneItem;
  12 typedef enum DnsZoneItemState DnsZoneItemState;
  13
  14 #include "resolved-dns-answer.h"
  15 #include "resolved-dns-question.h"
  16 #include "resolved-dns-rr.h"
  17 #include "resolved-dns-transaction.h"
  18
  19 /* RFC 4795 Section 2.8. suggests a TTL of 30s by default */
  20 #define LLMNR_DEFAULT_TTL (30)
  21
  22 /* RFC 6762 Section 10. suggests a TTL of 120s by default */
  23 #define MDNS_DEFAULT_TTL (120)
  24
  25 enum DnsZoneItemState {
  26         DNS_ZONE_ITEM_PROBING,
  27         DNS_ZONE_ITEM_ESTABLISHED,
  28         DNS_ZONE_ITEM_VERIFYING,
  29         DNS_ZONE_ITEM_WITHDRAWN,
  30 };
  31
  32 struct DnsZoneItem {
  33         DnsScope *scope;
  34         DnsResourceRecord *rr;
  35
  36         DnsZoneItemState state;
  37
  38         unsigned block_ready;
  39
  40         bool probing_enabled;
  41
  42         LIST_FIELDS(DnsZoneItem, by_key);
  43         LIST_FIELDS(DnsZoneItem, by_name);
  44
  45         DnsTransaction *probe_transaction;
  46 };
  47
  48 void dns_zone_flush(DnsZone *z);
  49
  50 int dns_zone_put(DnsZone *z, DnsScope *s, DnsResourceRecord *rr, bool probe);
  51 DnsZoneItem* dns_zone_get(DnsZone *z, DnsResourceRecord *rr);
  52 void dns_zone_remove_rr(DnsZone *z, DnsResourceRecord *rr);
  53 int dns_zone_remove_rrs_by_key(DnsZone *z, DnsResourceKey *key);
  54
  55 int dns_zone_lookup(DnsZone *z, DnsResourceKey *key, int ifindex, DnsAnswer **answer, DnsAnswer **soa, bool *tentative);
  56
  57 void dns_zone_item_conflict(DnsZoneItem *i);
  58 void dns_zone_item_notify(DnsZoneItem *i);
  59
  60 int dns_zone_check_conflicts(DnsZone *zone, DnsResourceRecord *rr);
  61 int dns_zone_verify_conflicts(DnsZone *zone, DnsResourceKey *key);
  62
  63 void dns_zone_verify_all(DnsZone *zone);
  64
  65 void dns_zone_item_probe_stop(DnsZoneItem *i);
  66
  67 void dns_zone_dump(DnsZone *zone, FILE *f);
  68 bool dns_zone_is_empty(DnsZone *zone);
  69 bool dns_zone_contains_name(DnsZone *z, const char *name);