src/resolve/resolved-dns-question.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 typedef struct DnsQuestion DnsQuestion;
  11
  12 #include "macro.h"
  13 #include "resolved-dns-rr.h"
  14
  15 /* A simple array of resource keys */
  16
  17 struct DnsQuestion {
  18         unsigned n_ref;
  19         size_t n_keys, n_allocated;
  20         DnsResourceKey* keys[0];
  21 };
  22
  23 DnsQuestion *dns_question_new(size_t n);
  24 DnsQuestion *dns_question_ref(DnsQuestion *q);
  25 DnsQuestion *dns_question_unref(DnsQuestion *q);
  26
  27 int dns_question_new_address(DnsQuestion **ret, int family, const char *name, bool convert_idna);
  28 int dns_question_new_reverse(DnsQuestion **ret, int family, const union in_addr_union *a);
  29 int dns_question_new_service(DnsQuestion **ret, const char *service, const char *type, const char *domain, bool with_txt, bool convert_idna);
  30
  31 int dns_question_add(DnsQuestion *q, DnsResourceKey *key);
  32
  33 int dns_question_matches_rr(DnsQuestion *q, DnsResourceRecord *rr, const char *search_domain);
  34 int dns_question_matches_cname_or_dname(DnsQuestion *q, DnsResourceRecord *rr, const char* search_domain);
  35 int dns_question_is_valid_for_query(DnsQuestion *q);
  36 int dns_question_contains(DnsQuestion *a, const DnsResourceKey *k);
  37 int dns_question_is_equal(DnsQuestion *a, DnsQuestion *b);
  38
  39 int dns_question_cname_redirect(DnsQuestion *q, const DnsResourceRecord *cname, DnsQuestion **ret);
  40
  41 const char *dns_question_first_name(DnsQuestion *q);
  42
  43 static inline size_t dns_question_size(DnsQuestion *q) {
  44         return q ? q->n_keys : 0;
  45 }
  46
  47 static inline bool dns_question_isempty(DnsQuestion *q) {
  48         return dns_question_size(q) <= 0;
  49 }
  50
  51 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsQuestion*, dns_question_unref);
  52
  53 #define _DNS_QUESTION_FOREACH(u, key, q)                                \
  54         for (size_t UNIQ_T(i, u) = ({                                 \
  55                                 (key) = ((q) && (q)->n_keys > 0) ? (q)->keys[0] : NULL; \
  56                                 0;                                      \
  57                         });                                             \
  58              (q) && (UNIQ_T(i, u) < (q)->n_keys);                       \
  59              UNIQ_T(i, u)++, (key) = (UNIQ_T(i, u) < (q)->n_keys ? (q)->keys[UNIQ_T(i, u)] : NULL))
  60
  61 #define DNS_QUESTION_FOREACH(key, q) _DNS_QUESTION_FOREACH(UNIQ, key, q)