dnsinfo/dnsinfo_private.c

   1 /*
   2  * Copyright (c) 2004, 2005, 2007, 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 /*
  25  * Modification History
  26  *
  27  * March 9, 2004                Allan Nathanson <ajn@apple.com>
  28  * - initial revision
  29  */
  30
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <mach/mach.h>
  34 #include <mach/mach_error.h>
  35 #include <servers/bootstrap.h>
  36 #include <bootstrap_priv.h>
  37
  38 #include "dnsinfo_private.h"
  39 #include "shared_dns_info_types.h"
  40
  41
  42 __private_extern__
  43 const char *
  44 _dns_configuration_notify_key()
  45 {
  46         return "com.apple.system.SystemConfiguration.dns_configuration";
  47 }
  48
  49
  50 __private_extern__
  51 mach_port_t
  52 _dns_configuration_server_port()
  53 {
  54         mach_port_t     server          = MACH_PORT_NULL;
  55         char            *server_name;
  56         kern_return_t   status;
  57
  58         server_name = getenv("DNS_SERVER");
  59         if (!server_name) {
  60                 server_name = DNS_SERVER;
  61         }
  62
  63 #ifdef  BOOTSTRAP_PRIVILEGED_SERVER
  64         status = bootstrap_look_up2(bootstrap_port,
  65                                     server_name,
  66                                     &server,
  67                                     0,
  68                                     BOOTSTRAP_PRIVILEGED_SERVER);
  69 #else   // BOOTSTRAP_PRIVILEGED_SERVER
  70         status = bootstrap_look_up(bootstrap_port, server_name, &server);
  71 #endif  // BOOTSTRAP_PRIVILEGED_SERVER
  72
  73         switch (status) {
  74                 case BOOTSTRAP_SUCCESS :
  75                         /* service currently registered, "a good thing" (tm) */
  76                         break;
  77                 case BOOTSTRAP_NOT_PRIVILEGED :
  78                         /* the service is not privileged */
  79                         return MACH_PORT_NULL;
  80                 case BOOTSTRAP_UNKNOWN_SERVICE :
  81                         /* service not currently registered, try again later */
  82                         return MACH_PORT_NULL;
  83                 default :
  84                         fprintf(stderr,
  85                                 "could not lookup DNS configuration info service: %s\n",
  86                                 bootstrap_strerror(status));
  87                         return MACH_PORT_NULL;
  88         }
  89
  90         return server;
  91 }
  92