src/shared/resolve-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include "conf-parser.h"
   4 #include "resolve-util.h"
   5 #include "string-table.h"
   6
   7 DEFINE_CONFIG_PARSE_ENUM(config_parse_resolve_support, resolve_support, ResolveSupport, "Failed to parse resolve support setting");
   8 DEFINE_CONFIG_PARSE_ENUM(config_parse_dnssec_mode, dnssec_mode, DnssecMode, "Failed to parse DNSSEC mode setting");
   9 DEFINE_CONFIG_PARSE_ENUM(config_parse_dns_over_tls_mode, dns_over_tls_mode, DnsOverTlsMode, "Failed to parse DNS-over-TLS mode setting");
  10
  11 static const char* const resolve_support_table[_RESOLVE_SUPPORT_MAX] = {
  12         [RESOLVE_SUPPORT_NO] = "no",
  13         [RESOLVE_SUPPORT_YES] = "yes",
  14         [RESOLVE_SUPPORT_RESOLVE] = "resolve",
  15 };
  16 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(resolve_support, ResolveSupport, RESOLVE_SUPPORT_YES);
  17
  18 static const char* const dnssec_mode_table[_DNSSEC_MODE_MAX] = {
  19         [DNSSEC_NO] = "no",
  20         [DNSSEC_ALLOW_DOWNGRADE] = "allow-downgrade",
  21         [DNSSEC_YES] = "yes",
  22 };
  23 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(dnssec_mode, DnssecMode, DNSSEC_YES);
  24
  25 static const char* const dns_over_tls_mode_table[_DNS_OVER_TLS_MODE_MAX] = {
  26         [DNS_OVER_TLS_NO] = "no",
  27         [DNS_OVER_TLS_OPPORTUNISTIC] = "opportunistic",
  28         [DNS_OVER_TLS_YES] = "yes",
  29 };
  30 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(dns_over_tls_mode, DnsOverTlsMode, DNS_OVER_TLS_YES);
  31
  32 bool dns_server_address_valid(int family, const union in_addr_union *sa) {
  33
  34         /* Refuses the 0 IP addresses as well as 127.0.0.53 (which is our own DNS stub) */
  35
  36         if (in_addr_is_null(family, sa))
  37                 return false;
  38
  39         if (family == AF_INET && sa->in.s_addr == htobe32(INADDR_DNS_STUB))
  40                 return false;
  41
  42         return true;
  43 }
  44
  45 DEFINE_CONFIG_PARSE_ENUM(config_parse_dns_cache_mode, dns_cache_mode, DnsCacheMode, "Failed to parse DNS cache mode setting")
  46
  47 static const char* const dns_cache_mode_table[_DNS_CACHE_MODE_MAX] = {
  48         [DNS_CACHE_MODE_YES] = "yes",
  49         [DNS_CACHE_MODE_NO] = "no",
  50         [DNS_CACHE_MODE_NO_NEGATIVE] = "no-negative",
  51 };
  52 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(dns_cache_mode, DnsCacheMode, DNS_CACHE_MODE_YES);