SystemConfiguration.fproj/SCDGet.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 <mach/mach.h>
  24 #include <mach/mach_error.h>
  25
  26 #include <SystemConfiguration/SCD.h>
  27 #include "config.h"             /* MiG generated file */
  28 #include "SCDPrivate.h"
  29
  30
  31 SCDStatus
  32 SCDGet(SCDSessionRef session, CFStringRef key, SCDHandleRef *handle)
  33 {
  34         SCDSessionPrivateRef    sessionPrivate = (SCDSessionPrivateRef)session;
  35         kern_return_t           status;
  36         CFDataRef               xmlKey;         /* key (XML serialized) */
  37         xmlData_t               myKeyRef;       /* key (serialized) */
  38         CFIndex                 myKeyLen;
  39         xmlDataOut_t            xmlDataRef;     /* data (serialized) */
  40         CFIndex                 xmlDataLen;
  41         CFDataRef               xmlData;        /* data (XML serialized) */
  42         CFPropertyListRef       data;           /* data (un-serialized) */
  43         int                     newInstance;
  44         SCDStatus               scd_status;
  45         CFStringRef             xmlError;
  46
  47         SCDLog(LOG_DEBUG, CFSTR("SCDGet:"));
  48         SCDLog(LOG_DEBUG, CFSTR("  key      = %@"), key);
  49
  50         if (key == NULL) {
  51                 return SCD_INVALIDARGUMENT;     /* no key specified */
  52         }
  53
  54         if ((session == NULL) || (sessionPrivate->server == MACH_PORT_NULL)) {
  55                 return SCD_NOSESSION;
  56         }
  57
  58         /* serialize the key */
  59         xmlKey = CFPropertyListCreateXMLData(NULL, key);
  60         myKeyRef = (xmlData_t)CFDataGetBytePtr(xmlKey);
  61         myKeyLen = CFDataGetLength(xmlKey);
  62
  63         /* send the key & fetch the associated data from the server */
  64         status = configget(sessionPrivate->server,
  65                            myKeyRef,
  66                            myKeyLen,
  67                            &xmlDataRef,
  68                            (int *)&xmlDataLen,
  69                            &newInstance,
  70                            (int *)&scd_status);
  71
  72         /* clean up */
  73         CFRelease(xmlKey);
  74
  75         if (status != KERN_SUCCESS) {
  76                 if (status != MACH_SEND_INVALID_DEST)
  77                         SCDLog(LOG_DEBUG, CFSTR("configget(): %s"), mach_error_string(status));
  78                 (void) mach_port_destroy(mach_task_self(), sessionPrivate->server);
  79                 sessionPrivate->server = MACH_PORT_NULL;
  80                 return SCD_NOSERVER;
  81         }
  82
  83         if (scd_status != SCD_OK) {
  84                 status = vm_deallocate(mach_task_self(), (vm_address_t)xmlDataRef, xmlDataLen);
  85                 if (status != KERN_SUCCESS) {
  86                         SCDLog(LOG_DEBUG, CFSTR("vm_deallocate(): %s"), mach_error_string(status));
  87                         /* non-fatal???, proceed */
  88                 }
  89                 *handle = NULL;
  90                 return scd_status;
  91         }
  92
  93         /* un-serialize the data, return a handle associated with the key */
  94         *handle = SCDHandleInit();
  95         xmlData = CFDataCreate(NULL, xmlDataRef, xmlDataLen);
  96         status = vm_deallocate(mach_task_self(), (vm_address_t)xmlDataRef, xmlDataLen);
  97         if (status != KERN_SUCCESS) {
  98                 SCDLog(LOG_DEBUG, CFSTR("vm_deallocate(): %s"), mach_error_string(status));
  99                 /* non-fatal???, proceed */
 100         }
 101         data = CFPropertyListCreateFromXMLData(NULL,
 102                                                xmlData,
 103                                                kCFPropertyListImmutable,
 104                                                &xmlError);
 105         CFRelease(xmlData);
 106         if (xmlError) {
 107                 SCDLog(LOG_DEBUG, CFSTR("CFPropertyListCreateFromXMLData() data: %s"), xmlError);
 108                 SCDHandleRelease(*handle);
 109                 return SCD_FAILED;
 110         }
 111         SCDHandleSetData(*handle, data);
 112         CFRelease(data);
 113
 114         _SCDHandleSetInstance(*handle, newInstance);
 115
 116         SCDLog(LOG_DEBUG, CFSTR("  data     = %@"), SCDHandleGetData(*handle));
 117         SCDLog(LOG_DEBUG, CFSTR("  instance = %d"), SCDHandleGetInstance(*handle));
 118
 119         return scd_status;
 120 }