dnsinfo/dnsinfo.h

   1 /*
   2  * Copyright (c) 2004-2006, 2008, 2009, 2011-2013 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #ifndef __DNSINFO_H__
  25 #define __DNSINFO_H__
  26
  27 /*
  28  * These routines provide access to the systems DNS configuration
  29  */
  30
  31 #include <Availability.h>
  32 #include <sys/cdefs.h>
  33 #include <stdint.h>
  34 #include <sys/types.h>
  35 #include <sys/socket.h>
  36 #include <netinet/in.h>
  37
  38 #define DNSINFO_VERSION         20130402
  39
  40 #define DEFAULT_SEARCH_ORDER    200000   /* search order for the "default" resolver domain name */
  41
  42 #define DNS_PTR(type, name)                             \
  43         union {                                         \
  44                 type            name;                   \
  45                 uint64_t        _ ## name ## _p;        \
  46         }
  47
  48 #define DNS_VAR(type, name)                             \
  49         type    name
  50
  51
  52 #pragma pack(4)
  53 typedef struct {
  54         struct in_addr  address;
  55         struct in_addr  mask;
  56 } dns_sortaddr_t;
  57 #pragma pack()
  58
  59
  60 #pragma pack(4)
  61 typedef struct {
  62         DNS_PTR(char *,                 domain);        /* domain */
  63         DNS_VAR(int32_t,                n_nameserver);  /* # nameserver */
  64         DNS_PTR(struct sockaddr **,     nameserver);
  65         DNS_VAR(uint16_t,               port);          /* port (in host byte order) */
  66         DNS_VAR(int32_t,                n_search);      /* # search */
  67         DNS_PTR(char **,                search);
  68         DNS_VAR(int32_t,                n_sortaddr);    /* # sortaddr */
  69         DNS_PTR(dns_sortaddr_t **,      sortaddr);
  70         DNS_PTR(char *,                 options);       /* options */
  71         DNS_VAR(uint32_t,               timeout);       /* timeout */
  72         DNS_VAR(uint32_t,               search_order);  /* search_order */
  73         DNS_VAR(uint32_t,               if_index);
  74         DNS_VAR(uint32_t,               flags);
  75         DNS_VAR(uint32_t,               reach_flags);   /* SCNetworkReachabilityFlags */
  76         DNS_VAR(uint32_t,               service_identifier);
  77         DNS_VAR(uint32_t,               reserved[4]);
  78 } dns_resolver_t;
  79 #pragma pack()
  80
  81
  82 #define DNS_RESOLVER_FLAGS_SCOPED               1               /* configuration is for scoped questions */
  83 #define DNS_RESOLVER_FLAGS_REQUEST_A_RECORDS    2               /* always requesting for A dns records in queries */
  84 #define DNS_RESOLVER_FLAGS_REQUEST_AAAA_RECORDS 4               /* always requesting for AAAA dns records in queries */
  85 #define DNS_RESOLVER_FLAGS_SERVICE_SPECIFIC     8               /* configuration is service-specific */
  86
  87 #define DNS_RESOLVER_FLAGS_REQUEST_ALL_RECORDS  \
  88         (DNS_RESOLVER_FLAGS_REQUEST_A_RECORDS | DNS_RESOLVER_FLAGS_REQUEST_AAAA_RECORDS)
  89
  90 #pragma pack(4)
  91 typedef struct {
  92         DNS_VAR(int32_t,                n_resolver);            /* resolver configurations */
  93         DNS_PTR(dns_resolver_t **,      resolver);
  94         DNS_VAR(int32_t,                n_scoped_resolver);     /* "scoped" resolver configurations */
  95         DNS_PTR(dns_resolver_t **,      scoped_resolver);
  96         DNS_VAR(uint64_t,               generation);
  97         DNS_VAR(int32_t,                n_service_specific_resolver);
  98         DNS_PTR(dns_resolver_t **,      service_specific_resolver);
  99 } dns_config_t;
 100 #pragma pack()
 101
 102
 103 __BEGIN_DECLS
 104
 105 /*
 106  * DNS configuration access APIs
 107  */
 108 const char *
 109 dns_configuration_notify_key    ()                              __OSX_AVAILABLE_STARTING(__MAC_10_4,__IPHONE_2_0);
 110
 111 dns_config_t *
 112 dns_configuration_copy          ()                              __OSX_AVAILABLE_STARTING(__MAC_10_4,__IPHONE_2_0);
 113
 114 void
 115 dns_configuration_free          (dns_config_t   *config)        __OSX_AVAILABLE_STARTING(__MAC_10_4,__IPHONE_2_0);
 116
 117 void
 118 _dns_configuration_ack          (dns_config_t   *config,
 119                                  const char     *bundle_id)     __OSX_AVAILABLE_STARTING(__MAC_10_8, __IPHONE_6_0);
 120
 121 __END_DECLS
 122
 123 #endif  /* __DNSINFO_H__ */