dnsinfo/dnsinfo_server.c

   1 /*
   2  * Copyright (c) 2004 Apple Computer, 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 <notify.h>
  32 #include <sysexits.h>
  33 #include <syslog.h>
  34 #include <unistd.h>
  35 #include <sys/types.h>
  36 #include <servers/bootstrap.h>
  37 #include <mach/mach.h>
  38 #include <mach/mach_error.h>
  39 #include <CoreFoundation/CoreFoundation.h>
  40 #include <SystemConfiguration/SCPrivate.h>
  41
  42 #include "dnsinfo_server.h"
  43 #include "dnsinfo_private.h"
  44
  45 #include "session.h"
  46
  47 static  CFDataRef       shared_dns_info         = NULL;
  48
  49 __private_extern__
  50 kern_return_t
  51 _shared_dns_infoGet(mach_port_t server, dnsDataOut_t *dataRef, mach_msg_type_number_t *dataLen)
  52 {
  53         *dataRef = NULL;
  54         *dataLen = 0;
  55
  56         if (shared_dns_info != NULL) {
  57                 if (!_SCSerializeData(shared_dns_info, (void **)dataRef, (CFIndex *)dataLen)) {
  58                         return KERN_FAILURE;
  59                 }
  60         }
  61
  62         return KERN_SUCCESS;
  63 }
  64
  65
  66 __private_extern__
  67 kern_return_t
  68 _shared_dns_infoSet(mach_port_t server, dnsData_t dataRef, mach_msg_type_number_t dataLen)
  69 {
  70         CFDataRef               new_dns_info    = NULL;
  71         const char              *notify_key;
  72         serverSessionRef        mySession       = getSession(server);
  73
  74         if ((dataRef != NULL) && (dataLen > 0)) {
  75                 if (!_SCUnserializeData(&new_dns_info, (void *)dataRef, dataLen)) {
  76                         goto error;
  77                 }
  78         }
  79
  80         if (mySession->callerEUID != 0) {
  81                 goto error;
  82         }
  83
  84         if (shared_dns_info != NULL) CFRelease(shared_dns_info);
  85         shared_dns_info = new_dns_info;
  86
  87         notify_key = _dns_configuration_notify_key();
  88         if (notify_key != NULL) {
  89                 uint32_t        status;
  90
  91                 status = notify_post(notify_key);
  92                 if (status != NOTIFY_STATUS_OK) {
  93                         SCLog(TRUE, LOG_ERR, CFSTR("notify_post() failed: %d"), status);
  94                         // notification posting failures are non-fatal
  95                 }
  96         }
  97
  98         return KERN_SUCCESS;
  99
 100     error :
 101
 102         if (new_dns_info != NULL)    CFRelease(new_dns_info);
 103         return KERN_FAILURE;
 104 }