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 #include "configd.h"
  24 #include "session.h"
  25
  26 SCDStatus
  27 _SCDNotifierInformViaMachPort(SCDSessionRef session, mach_msg_id_t identifier, mach_port_t *port)
  28 {
  29         SCDSessionPrivateRef    sessionPrivate = (SCDSessionPrivateRef)session;
  30         CFStringRef             sessionKey;
  31         CFDictionaryRef         info;
  32
  33         SCDLog(LOG_DEBUG, CFSTR("_SCDNotifierInformViaMachPort:"));
  34
  35         if ((session == NULL) || (sessionPrivate->server == MACH_PORT_NULL)) {
  36                 return SCD_NOSESSION;   /* you must have an open session to play */
  37         }
  38
  39         if (sessionPrivate->notifyStatus != NotifierNotRegistered) {
  40                 /* sorry, you can only have one notification registered at once */
  41                 return SCD_NOTIFIERACTIVE;
  42         }
  43
  44         if (*port == MACH_PORT_NULL) {
  45                 /* sorry, you must specify a valid mach port */
  46                 return SCD_INVALIDARGUMENT;
  47         }
  48
  49         /* push out a notification if any changes are pending */
  50         sessionKey = CFStringCreateWithFormat(NULL, NULL, CFSTR("%d"), sessionPrivate->server);
  51         info = CFDictionaryGetValue(sessionData, sessionKey);
  52         CFRelease(sessionKey);
  53         if (info && CFDictionaryContainsKey(info, kSCDChangedKeys)) {
  54                 CFNumberRef     sessionNum;
  55
  56                 if (needsNotification == NULL)
  57                         needsNotification = CFSetCreateMutable(NULL,
  58                                                                0,
  59                                                                &kCFTypeSetCallBacks);
  60
  61                 sessionNum = CFNumberCreate(NULL, kCFNumberIntType, &sessionPrivate->server);
  62                 CFSetAddValue(needsNotification, sessionNum);
  63                 CFRelease(sessionNum);
  64         }
  65
  66         return SCD_OK;
  67 }
  68
  69
  70 kern_return_t
  71 _notifyviaport(mach_port_t      server,
  72                mach_port_t      port,
  73                mach_msg_id_t    identifier,
  74                int              *scd_status
  75 )
  76 {
  77         serverSessionRef        mySession = getSession(server);
  78         SCDSessionPrivateRef    sessionPrivate = (SCDSessionPrivateRef)mySession->session;
  79
  80         SCDLog(LOG_DEBUG, CFSTR("Send mach message when a notification key changes."));
  81         SCDLog(LOG_DEBUG, CFSTR("  server     = %d"), server);
  82         SCDLog(LOG_DEBUG, CFSTR("  port       = %d"), port);
  83         SCDLog(LOG_DEBUG, CFSTR("  message id = %d"), identifier);
  84
  85         if (sessionPrivate->notifyPort != MACH_PORT_NULL) {
  86                 SCDLog(LOG_DEBUG, CFSTR("  destroying old callback mach port %d"), sessionPrivate->notifyPort);
  87                 (void) mach_port_destroy(mach_task_self(), sessionPrivate->notifyPort);
  88         }
  89
  90         *scd_status = _SCDNotifierInformViaMachPort(mySession->session, identifier, &port);
  91
  92         if (*scd_status == SCD_OK) {
  93                 /* save notification port, requested identifier, and set notifier active */
  94                 sessionPrivate->notifyStatus         = Using_NotifierInformViaMachPort;
  95                 sessionPrivate->notifyPort           = port;
  96                 sessionPrivate->notifyPortIdentifier = identifier;
  97         }
  98
  99         return KERN_SUCCESS;
 100 }