dnsinfo/dnsinfo.h

   1 /*
   2  * Copyright (c) 2004-2006, 2008, 2009 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 DEFAULT_SEARCH_ORDER    200000   /* search order for the "default" resolver domain name */
  39
  40 #define DNS_PTR(type, name)                             \
  41         union {                                         \
  42                 type            name;                   \
  43                 uint64_t        _ ## name ## _p;        \
  44         }
  45
  46 #define DNS_VAR(type, name)                             \
  47         type    name
  48
  49
  50 #pragma pack(4)
  51 typedef struct {
  52         struct in_addr  address;
  53         struct in_addr  mask;
  54 } dns_sortaddr_t;
  55 #pragma pack()
  56
  57
  58 #pragma pack(4)
  59 typedef struct {
  60         DNS_PTR(char *,                 domain);        /* domain */
  61         DNS_VAR(int32_t,                n_nameserver);  /* # nameserver */
  62         DNS_PTR(struct sockaddr **,     nameserver);
  63         DNS_VAR(uint16_t,               port);          /* port (in host byte order) */
  64         DNS_VAR(int32_t,                n_search);      /* # search */
  65         DNS_PTR(char **,                search);
  66         DNS_VAR(int32_t,                n_sortaddr);    /* # sortaddr */
  67         DNS_PTR(dns_sortaddr_t **,      sortaddr);
  68         DNS_PTR(char *,                 options);       /* options */
  69         DNS_VAR(uint32_t,               timeout);       /* timeout */
  70         DNS_VAR(uint32_t,               search_order);  /* search_order */
  71         DNS_VAR(uint32_t,               reserved[8]);
  72 } dns_resolver_t;
  73 #pragma pack()
  74
  75
  76 #pragma pack(4)
  77 typedef struct {
  78         DNS_VAR(int32_t,                n_resolver);    /* resolver configurations */
  79         DNS_PTR(dns_resolver_t **,      resolver);
  80         DNS_VAR(uint32_t,               reserved[8]);
  81 } dns_config_t;
  82 #pragma pack()
  83
  84
  85 __BEGIN_DECLS
  86
  87 /*
  88  * DNS configuration access APIs
  89  */
  90 const char *
  91 dns_configuration_notify_key    ()                              __OSX_AVAILABLE_STARTING(__MAC_10_4,__IPHONE_2_0);
  92
  93 dns_config_t *
  94 dns_configuration_copy          ()                              __OSX_AVAILABLE_STARTING(__MAC_10_4,__IPHONE_2_0);
  95
  96 void
  97 dns_configuration_free          (dns_config_t   *config)        __OSX_AVAILABLE_STARTING(__MAC_10_4,__IPHONE_2_0);
  98
  99 __END_DECLS
 100
 101 #endif  /* __DNSINFO_H__ */