configd.tproj/_notifyviaport.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22
  23 /*
  24  * Modification History
  25  *
  26  * June 1, 2001                 Allan Nathanson <ajn@apple.com>
  27  * - public API conversion
  28  *
  29  * March 24, 2000               Allan Nathanson <ajn@apple.com>
  30  * - initial revision
  31  */
  32
  33 #include "configd.h"
  34 #include "session.h"
  35
  36 int
  37 __SCDynamicStoreNotifyMachPort(SCDynamicStoreRef        store,
  38                                mach_msg_id_t            identifier,
  39                                mach_port_t              *port)
  40 {
  41         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
  42         CFStringRef                     sessionKey;
  43         CFDictionaryRef                 info;
  44
  45         SCLog(_configd_verbose, LOG_DEBUG, CFSTR("__SCDynamicStoreNotifyMachPort:"));
  46
  47         if (!store || (storePrivate->server == MACH_PORT_NULL)) {
  48                 return kSCStatusNoStoreSession;         /* you must have an open session to play */
  49         }
  50
  51         if (storePrivate->notifyStatus != NotifierNotRegistered) {
  52                 /* sorry, you can only have one notification registered at once */
  53                 return kSCStatusNotifierActive;
  54         }
  55
  56         if (*port == MACH_PORT_NULL) {
  57                 /* sorry, you must specify a valid mach port */
  58                 return kSCStatusInvalidArgument;
  59         }
  60
  61         /* push out a notification if any changes are pending */
  62         sessionKey = CFStringCreateWithFormat(NULL, NULL, CFSTR("%d"), storePrivate->server);
  63         info = CFDictionaryGetValue(sessionData, sessionKey);
  64         CFRelease(sessionKey);
  65         if (info && CFDictionaryContainsKey(info, kSCDChangedKeys)) {
  66                 CFNumberRef     sessionNum;
  67
  68                 if (needsNotification == NULL)
  69                         needsNotification = CFSetCreateMutable(NULL,
  70                                                                0,
  71                                                                &kCFTypeSetCallBacks);
  72
  73                 sessionNum = CFNumberCreate(NULL, kCFNumberIntType, &storePrivate->server);
  74                 CFSetAddValue(needsNotification, sessionNum);
  75                 CFRelease(sessionNum);
  76         }
  77
  78         return kSCStatusOK;
  79 }
  80
  81
  82 kern_return_t
  83 _notifyviaport(mach_port_t      server,
  84                mach_port_t      port,
  85                mach_msg_id_t    identifier,
  86                int              *sc_status
  87 )
  88 {
  89         serverSessionRef                mySession = getSession(server);
  90         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)mySession->store;
  91
  92         SCLog(_configd_verbose, LOG_DEBUG, CFSTR("Send mach message when a notification key changes."));
  93         SCLog(_configd_verbose, LOG_DEBUG, CFSTR("  server     = %d"), server);
  94         SCLog(_configd_verbose, LOG_DEBUG, CFSTR("  port       = %d"), port);
  95         SCLog(_configd_verbose, LOG_DEBUG, CFSTR("  message id = %d"), identifier);
  96
  97         if (storePrivate->notifyPort != MACH_PORT_NULL) {
  98                 SCLog(_configd_verbose, LOG_DEBUG, CFSTR("  destroying old callback mach port %d"), storePrivate->notifyPort);
  99                 (void) mach_port_destroy(mach_task_self(), storePrivate->notifyPort);
 100         }
 101
 102         *sc_status = __SCDynamicStoreNotifyMachPort(mySession->store, identifier, &port);
 103
 104         if (*sc_status == kSCStatusOK) {
 105                 /* save notification port, requested identifier, and set notifier active */
 106                 storePrivate->notifyStatus         = Using_NotifierInformViaMachPort;
 107                 storePrivate->notifyPort           = port;
 108                 storePrivate->notifyPortIdentifier = identifier;
 109         }
 110
 111         return KERN_SUCCESS;
 112 }