SystemConfiguration.fproj/SCDNotify.c

   1 /*
   2  * Copyright (c) 2000, 2001, 2003-2005, 2009, 2010 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  * May 19, 2001         Allan Nathanson <ajn@apple.com>
  28  * - initial revision
  29  */
  30
  31 #include <mach/mach.h>
  32 #include <mach/mach_error.h>
  33
  34 #include <SystemConfiguration/SystemConfiguration.h>
  35 #include <SystemConfiguration/SCPrivate.h>
  36 #include "SCDynamicStoreInternal.h"
  37 #include "config.h"             /* MiG generated file */
  38
  39 Boolean
  40 SCDynamicStoreNotifyValue(SCDynamicStoreRef     store,
  41                           CFStringRef           key)
  42 {
  43         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
  44         kern_return_t                   status;
  45         CFDataRef                       utfKey;         /* serialized key */
  46         xmlData_t                       myKeyRef;
  47         CFIndex                         myKeyLen;
  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         /* serialize the key */
  63         if (!_SCSerializeString(key, &utfKey, (void **)&myKeyRef, &myKeyLen)) {
  64                 _SCErrorSet(kSCStatusFailed);
  65                 return FALSE;
  66         }
  67
  68     retry :
  69
  70         /* send the key to the server */
  71         status = confignotify(storePrivate->server,
  72                               myKeyRef,
  73                               myKeyLen,
  74                               (int *)&sc_status);
  75
  76         if (status != KERN_SUCCESS) {
  77                 if ((status == MACH_SEND_INVALID_DEST) || (status == MIG_SERVER_DIED)) {
  78                         /* the server's gone and our session port's dead, remove the dead name right */
  79                         (void) mach_port_deallocate(mach_task_self(), storePrivate->server);
  80                 } else {
  81                         /* we got an unexpected error, leave the [session] port alone */
  82                         SCLog(TRUE, LOG_ERR, CFSTR("SCDynamicStoreNotifyValue confignotify(): %s"), mach_error_string(status));
  83                 }
  84                 storePrivate->server = MACH_PORT_NULL;
  85                 if ((status == MACH_SEND_INVALID_DEST) || (status == MIG_SERVER_DIED)) {
  86                         if (__SCDynamicStoreReconnect(store)) {
  87                                 goto retry;
  88                         }
  89                 }
  90                 sc_status = status;
  91         }
  92
  93         /* clean up */
  94         CFRelease(utfKey);
  95
  96         if (sc_status != kSCStatusOK) {
  97                 _SCErrorSet(sc_status);
  98                 return FALSE;
  99         }
 100
 101         return TRUE;
 102 }