configd.tproj/_notifyviaport.c

   1 /*
   2  * Copyright (c) 2000, 2001, 2003, 2004, 2006, 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  * June 1, 2001                 Allan Nathanson <ajn@apple.com>
  28  * - public API conversion
  29  *
  30  * March 24, 2000               Allan Nathanson <ajn@apple.com>
  31  * - initial revision
  32  */
  33
  34 #include "configd.h"
  35 #include "session.h"
  36
  37 __private_extern__
  38 int
  39 __SCDynamicStoreNotifyMachPort(SCDynamicStoreRef        store,
  40                                mach_msg_id_t            identifier,
  41                                mach_port_t              port)
  42 {
  43         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
  44         CFStringRef                     sessionKey;
  45         CFDictionaryRef                 info;
  46
  47         if ((store == NULL) || (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 __private_extern__
  83 kern_return_t
  84 _notifyviaport(mach_port_t      server,
  85                mach_port_t      port,
  86                mach_msg_id_t    identifier,
  87                int              *sc_status
  88 )
  89 {
  90         serverSessionRef                mySession       = getSession(server);
  91         SCDynamicStorePrivateRef        storePrivate;
  92
  93         if (mySession == NULL) {
  94                 /* sorry, you must have an open session to play */
  95                 *sc_status = kSCStatusNoStoreSession;
  96                 if (port != MACH_PORT_NULL) {
  97                         (void) mach_port_deallocate(mach_task_self(), port);
  98                 }
  99                 return KERN_SUCCESS;
 100         }
 101         storePrivate = (SCDynamicStorePrivateRef)mySession->store;
 102
 103         *sc_status = __SCDynamicStoreNotifyMachPort(mySession->store, identifier, port);
 104         if (*sc_status != kSCStatusOK) {
 105                 // if we can't enable the notification, release the provided callback port
 106                 if (port != MACH_PORT_NULL) {
 107                         __MACH_PORT_DEBUG(TRUE, "*** _notifyviaport __SCDynamicStoreNotifyMachPort failed: releasing port", port);
 108                         (void) mach_port_deallocate(mach_task_self(), port);
 109                 }
 110                 return KERN_SUCCESS;
 111         }
 112
 113         /* save notification port, requested identifier, and set notifier active */
 114         __MACH_PORT_DEBUG(TRUE, "*** _notifyviaport", port);
 115         storePrivate->notifyStatus         = Using_NotifierInformViaMachPort;
 116         storePrivate->notifyPort           = port;
 117         storePrivate->notifyPortIdentifier = identifier;
 118
 119         return KERN_SUCCESS;
 120 }