configd.tproj/_notifyviaport.c

   1 /*
   2  * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25
  26 /*
  27  * Modification History
  28  *
  29  * June 1, 2001                 Allan Nathanson <ajn@apple.com>
  30  * - public API conversion
  31  *
  32  * March 24, 2000               Allan Nathanson <ajn@apple.com>
  33  * - initial revision
  34  */
  35
  36 #include "configd.h"
  37 #include "session.h"
  38
  39 __private_extern__
  40 int
  41 __SCDynamicStoreNotifyMachPort(SCDynamicStoreRef        store,
  42                                mach_msg_id_t            identifier,
  43                                mach_port_t              *port)
  44 {
  45         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
  46         CFStringRef                     sessionKey;
  47         CFDictionaryRef                 info;
  48
  49         SCLog(_configd_verbose, LOG_DEBUG, CFSTR("__SCDynamicStoreNotifyMachPort:"));
  50
  51         if (!store || (storePrivate->server == MACH_PORT_NULL)) {
  52                 return kSCStatusNoStoreSession;         /* you must have an open session to play */
  53         }
  54
  55         if (storePrivate->notifyStatus != NotifierNotRegistered) {
  56                 /* sorry, you can only have one notification registered at once */
  57                 return kSCStatusNotifierActive;
  58         }
  59
  60         if (*port == MACH_PORT_NULL) {
  61                 /* sorry, you must specify a valid mach port */
  62                 return kSCStatusInvalidArgument;
  63         }
  64
  65         /* push out a notification if any changes are pending */
  66         sessionKey = CFStringCreateWithFormat(NULL, NULL, CFSTR("%d"), storePrivate->server);
  67         info = CFDictionaryGetValue(sessionData, sessionKey);
  68         CFRelease(sessionKey);
  69         if (info && CFDictionaryContainsKey(info, kSCDChangedKeys)) {
  70                 CFNumberRef     sessionNum;
  71
  72                 if (needsNotification == NULL)
  73                         needsNotification = CFSetCreateMutable(NULL,
  74                                                                0,
  75                                                                &kCFTypeSetCallBacks);
  76
  77                 sessionNum = CFNumberCreate(NULL, kCFNumberIntType, &storePrivate->server);
  78                 CFSetAddValue(needsNotification, sessionNum);
  79                 CFRelease(sessionNum);
  80         }
  81
  82         return kSCStatusOK;
  83 }
  84
  85
  86 __private_extern__
  87 kern_return_t
  88 _notifyviaport(mach_port_t      server,
  89                mach_port_t      port,
  90                mach_msg_id_t    identifier,
  91                int              *sc_status
  92 )
  93 {
  94         serverSessionRef                mySession = getSession(server);
  95         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)mySession->store;
  96
  97         if (_configd_verbose) {
  98                 SCLog(TRUE, LOG_DEBUG, CFSTR("Send mach message when a notification key changes."));
  99                 SCLog(TRUE, LOG_DEBUG, CFSTR("  server     = %d"), server);
 100                 SCLog(TRUE, LOG_DEBUG, CFSTR("  port       = %d"), port);
 101                 SCLog(TRUE, LOG_DEBUG, CFSTR("  message id = %d"), identifier);
 102         }
 103
 104         if (!mySession) {
 105                 *sc_status = kSCStatusNoStoreSession;   /* you must have an open session to play */
 106                 return KERN_SUCCESS;
 107         }
 108
 109         if (storePrivate->notifyPort != MACH_PORT_NULL) {
 110                 SCLog(_configd_verbose, LOG_DEBUG, CFSTR("  destroying old callback mach port %d"), storePrivate->notifyPort);
 111                 (void) mach_port_destroy(mach_task_self(), storePrivate->notifyPort);
 112         }
 113
 114         *sc_status = __SCDynamicStoreNotifyMachPort(mySession->store, identifier, &port);
 115
 116         if (*sc_status == kSCStatusOK) {
 117                 /* save notification port, requested identifier, and set notifier active */
 118                 storePrivate->notifyStatus         = Using_NotifierInformViaMachPort;
 119                 storePrivate->notifyPort           = port;
 120                 storePrivate->notifyPortIdentifier = identifier;
 121         }
 122
 123         return KERN_SUCCESS;
 124 }