SystemConfiguration.fproj/SCDNotifierInformViaMachPort.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, 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 31, 2000               Allan Nathanson <ajn@apple.com>
  31  * - initial revision
  32  */
  33
  34 #include <mach/mach.h>
  35 #include <mach/mach_error.h>
  36
  37 #include <SystemConfiguration/SystemConfiguration.h>
  38 #include <SystemConfiguration/SCPrivate.h>
  39 #include "SCDynamicStoreInternal.h"
  40 #include "config.h"             /* MiG generated file */
  41
  42 Boolean
  43 SCDynamicStoreNotifyMachPort(SCDynamicStoreRef store, mach_msg_id_t identifier, mach_port_t *port)
  44 {
  45         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
  46         kern_return_t                   status;
  47         mach_port_t                     oldNotify;
  48         int                             sc_status;
  49
  50         if (store == NULL) {
  51                 /* sorry, you must provide a session */
  52                 _SCErrorSet(kSCStatusNoStoreSession);
  53                 return FALSE;
  54         }
  55
  56         if (storePrivate->server == MACH_PORT_NULL) {
  57                 /* sorry, you must have an open session to play */
  58                 _SCErrorSet(kSCStatusNoStoreServer);
  59                 return FALSE;
  60         }
  61
  62         if (storePrivate->notifyStatus != NotifierNotRegistered) {
  63                 /* sorry, you can only have one notification registered at once */
  64                 _SCErrorSet(kSCStatusNotifierActive);
  65                 return FALSE;
  66         }
  67
  68         /* Allocating port (for server response) */
  69         status = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, port);
  70         if (status != KERN_SUCCESS) {
  71                 SCLog(TRUE, LOG_DEBUG, CFSTR("SCDynamicStoreNotifyMachPort mach_port_allocate(): %s"), mach_error_string(status));
  72                 _SCErrorSet(status);
  73                 return FALSE;
  74         }
  75
  76         status = mach_port_insert_right(mach_task_self(),
  77                                         *port,
  78                                         *port,
  79                                         MACH_MSG_TYPE_MAKE_SEND);
  80         if (status != KERN_SUCCESS) {
  81                 SCLog(TRUE, LOG_DEBUG, CFSTR("SCDynamicStoreNotifyMachPort mach_port_insert_right(): %s"), mach_error_string(status));
  82                 (void) mach_port_destroy(mach_task_self(), *port);
  83                 *port = MACH_PORT_NULL;
  84                 _SCErrorSet(status);
  85                 return FALSE;
  86         }
  87
  88         /* Request a notification when/if the server dies */
  89         status = mach_port_request_notification(mach_task_self(),
  90                                                 *port,
  91                                                 MACH_NOTIFY_NO_SENDERS,
  92                                                 1,
  93                                                 *port,
  94                                                 MACH_MSG_TYPE_MAKE_SEND_ONCE,
  95                                                 &oldNotify);
  96         if (status != KERN_SUCCESS) {
  97                 SCLog(TRUE, LOG_DEBUG, CFSTR("SCDynamicStoreNotifyMachPort mach_port_request_notification(): %s"), mach_error_string(status));
  98                 (void) mach_port_destroy(mach_task_self(), *port);
  99                 *port = MACH_PORT_NULL;
 100                 _SCErrorSet(status);
 101                 return FALSE;
 102         }
 103
 104 #ifdef  DEBUG
 105         if (oldNotify != MACH_PORT_NULL) {
 106                 SCLog(TRUE, LOG_ERR, CFSTR("SCDynamicStoreNotifyMachPort(): why is oldNotify != MACH_PORT_NULL?"));
 107         }
 108 #endif  /* DEBUG */
 109
 110         status = notifyviaport(storePrivate->server,
 111                                *port,
 112                                identifier,
 113                                (int *)&sc_status);
 114
 115         if (status != KERN_SUCCESS) {
 116 #ifdef  DEBUG
 117                 if (status != MACH_SEND_INVALID_DEST)
 118                         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("SCDynamicStoreNotifyMachPort notifyviaport(): %s"), mach_error_string(status));
 119 #endif  /* DEBUG */
 120                 (void) mach_port_destroy(mach_task_self(), *port);
 121                 *port = MACH_PORT_NULL;
 122                 (void) mach_port_destroy(mach_task_self(), storePrivate->server);
 123                 storePrivate->server = MACH_PORT_NULL;
 124                 _SCErrorSet(status);
 125                 return FALSE;
 126         }
 127
 128         /* set notifier active */
 129         storePrivate->notifyStatus = Using_NotifierInformViaMachPort;
 130
 131         return TRUE;
 132 }