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