SystemConfiguration.fproj/SCDNotifierInformViaMachPort.c

   1 /*
   2  * Copyright (c) 2000 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 31, 2000               Allan Nathanson <ajn@apple.com>
  33  * - initial revision
  34  */
  35
  36 #include <mach/mach.h>
  37 #include <mach/mach_error.h>
  38
  39 #include <SystemConfiguration/SystemConfiguration.h>
  40 #include <SystemConfiguration/SCPrivate.h>
  41 #include "SCDynamicStoreInternal.h"
  42 #include "config.h"             /* MiG generated file */
  43
  44 Boolean
  45 SCDynamicStoreNotifyMachPort(SCDynamicStoreRef store, mach_msg_id_t identifier, mach_port_t *port)
  46 {
  47         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
  48         kern_return_t                   status;
  49         mach_port_t                     oldNotify;
  50         int                             sc_status;
  51
  52         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("SCDynamicStoreNotifyMachPort:"));
  53
  54         if (!store) {
  55                 /* sorry, you must provide a session */
  56                 _SCErrorSet(kSCStatusNoStoreSession);
  57                 return FALSE;
  58         }
  59
  60         if (storePrivate->server == MACH_PORT_NULL) {
  61                 /* sorry, you must have an open session to play */
  62                 _SCErrorSet(kSCStatusNoStoreServer);
  63                 return FALSE;
  64         }
  65
  66         if (storePrivate->notifyStatus != NotifierNotRegistered) {
  67                 /* sorry, you can only have one notification registered at once */
  68                 _SCErrorSet(kSCStatusNotifierActive);
  69                 return FALSE;
  70         }
  71
  72         /* Allocating port (for server response) */
  73         status = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, port);
  74         if (status != KERN_SUCCESS) {
  75                 SCLog(_sc_verbose, LOG_DEBUG, CFSTR("mach_port_allocate(): %s"), mach_error_string(status));
  76                 _SCErrorSet(status);
  77                 return FALSE;
  78         }
  79         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("  port = %d"), *port);
  80
  81         status = mach_port_insert_right(mach_task_self(),
  82                                         *port,
  83                                         *port,
  84                                         MACH_MSG_TYPE_MAKE_SEND);
  85         if (status != KERN_SUCCESS) {
  86                 SCLog(_sc_verbose, LOG_DEBUG, CFSTR("mach_port_insert_right(): %s"), mach_error_string(status));
  87                 (void) mach_port_destroy(mach_task_self(), *port);
  88                 *port = MACH_PORT_NULL;
  89                 _SCErrorSet(status);
  90                 return FALSE;
  91         }
  92
  93         /* Request a notification when/if the server dies */
  94         status = mach_port_request_notification(mach_task_self(),
  95                                                 *port,
  96                                                 MACH_NOTIFY_NO_SENDERS,
  97                                                 1,
  98                                                 *port,
  99                                                 MACH_MSG_TYPE_MAKE_SEND_ONCE,
 100                                                 &oldNotify);
 101         if (status != KERN_SUCCESS) {
 102                 SCLog(_sc_verbose, LOG_DEBUG, CFSTR("mach_port_request_notification(): %s"), mach_error_string(status));
 103                 (void) mach_port_destroy(mach_task_self(), *port);
 104                 *port = MACH_PORT_NULL;
 105                 _SCErrorSet(status);
 106                 return FALSE;
 107         }
 108
 109         if (oldNotify != MACH_PORT_NULL) {
 110                 SCLog(_sc_verbose, LOG_ERR, CFSTR("SCDynamicStoreNotifyMachPort(): why is oldNotify != MACH_PORT_NULL?"));
 111         }
 112
 113         status = notifyviaport(storePrivate->server,
 114                                *port,
 115                                identifier,
 116                                (int *)&sc_status);
 117
 118         if (status != KERN_SUCCESS) {
 119                 if (status != MACH_SEND_INVALID_DEST)
 120                         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("notifyviaport(): %s"), mach_error_string(status));
 121                 (void) mach_port_destroy(mach_task_self(), *port);
 122                 *port = MACH_PORT_NULL;
 123                 (void) mach_port_destroy(mach_task_self(), storePrivate->server);
 124                 storePrivate->server = MACH_PORT_NULL;
 125                 _SCErrorSet(status);
 126                 return FALSE;
 127         }
 128
 129         /* set notifier active */
 130         storePrivate->notifyStatus = Using_NotifierInformViaMachPort;
 131
 132         return TRUE;
 133 }