src/resolve/resolved-dns-zone.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 "hashmap.h"
  11
  12 typedef struct DnsZone {
  13         Hashmap *by_key;
  14         Hashmap *by_name;
  15 } DnsZone;
  16
  17 typedef struct DnsZoneItem DnsZoneItem;
  18 typedef enum DnsZoneItemState DnsZoneItemState;
  19
  20 #include "resolved-dns-answer.h"
  21 #include "resolved-dns-question.h"
  22 #include "resolved-dns-rr.h"
  23 #include "resolved-dns-transaction.h"
  24
  25 /* RFC 4795 Section 2.8. suggests a TTL of 30s by default */
  26 #define LLMNR_DEFAULT_TTL (30)
  27
  28 /* RFC 6762 Section 10. suggests a TTL of 120s by default */
  29 #define MDNS_DEFAULT_TTL (120)
  30
  31 enum DnsZoneItemState {
  32         DNS_ZONE_ITEM_PROBING,
  33         DNS_ZONE_ITEM_ESTABLISHED,
  34         DNS_ZONE_ITEM_VERIFYING,
  35         DNS_ZONE_ITEM_WITHDRAWN,
  36 };
  37
  38 struct DnsZoneItem {
  39         DnsScope *scope;
  40         DnsResourceRecord *rr;
  41
  42         DnsZoneItemState state;
  43
  44         unsigned block_ready;
  45
  46         bool probing_enabled;
  47
  48         LIST_FIELDS(DnsZoneItem, by_key);
  49         LIST_FIELDS(DnsZoneItem, by_name);
  50
  51         DnsTransaction *probe_transaction;
  52 };
  53
  54 void dns_zone_flush(DnsZone *z);
  55
  56 int dns_zone_put(DnsZone *z, DnsScope *s, DnsResourceRecord *rr, bool probe);
  57 DnsZoneItem* dns_zone_get(DnsZone *z, DnsResourceRecord *rr);
  58 void dns_zone_remove_rr(DnsZone *z, DnsResourceRecord *rr);
  59 int dns_zone_remove_rrs_by_key(DnsZone *z, DnsResourceKey *key);
  60
  61 int dns_zone_lookup(DnsZone *z, DnsResourceKey *key, int ifindex, DnsAnswer **answer, DnsAnswer **soa, bool *tentative);
  62
  63 void dns_zone_item_conflict(DnsZoneItem *i);
  64 void dns_zone_item_notify(DnsZoneItem *i);
  65
  66 int dns_zone_check_conflicts(DnsZone *zone, DnsResourceRecord *rr);
  67 int dns_zone_verify_conflicts(DnsZone *zone, DnsResourceKey *key);
  68
  69 void dns_zone_verify_all(DnsZone *zone);
  70
  71 void dns_zone_item_probe_stop(DnsZoneItem *i);
  72
  73 void dns_zone_dump(DnsZone *zone, FILE *f);
  74 bool dns_zone_is_empty(DnsZone *zone);
  75 bool dns_zone_contains_name(DnsZone *z, const char *name);