SystemConfiguration.fproj/SCP.c

   1 /*
   2  * Copyright (c) 2000, 2001, 2003-2005, 2007-2009, 2011, 2014 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  * June 1, 2001                 Allan Nathanson <ajn@apple.com>
  28  * - public API conversion
  29  *
  30  * November 9, 2000             Allan Nathanson <ajn@apple.com>
  31  * - initial revision
  32  */
  33
  34 #include <SystemConfiguration/SystemConfiguration.h>
  35 #include <SystemConfiguration/SCPrivate.h>
  36 #include "SCPreferencesInternal.h"
  37 #include "SCNetworkConfigurationInternal.h"
  38
  39 #include <fcntl.h>
  40 #include <pwd.h>
  41 #include <unistd.h>
  42 #include <sys/errno.h>
  43 #include <sys/param.h>
  44
  45 __private_extern__ CF_RETURNS_RETAINED CFDataRef
  46 __SCPSignatureFromStatbuf(const struct stat *statBuf)
  47 {
  48         CFMutableDataRef        signature;
  49         SCPSignatureDataRef     sig;
  50
  51         signature = CFDataCreateMutable(NULL, sizeof(SCPSignatureData));
  52         CFDataSetLength(signature, sizeof(SCPSignatureData));
  53
  54         /* ALIGN: CFDataGetBytePtr aligns to at least 8 bytes */
  55         sig = (SCPSignatureDataRef)(void *)CFDataGetBytePtr(signature);
  56
  57         sig->st_dev       = statBuf->st_dev;
  58         sig->st_ino       = statBuf->st_ino;
  59         sig->tv_sec       = statBuf->st_mtimespec.tv_sec;
  60         sig->tv_nsec      = statBuf->st_mtimespec.tv_nsec;
  61         sig->st_size      = statBuf->st_size;
  62         return signature;
  63 }
  64
  65
  66 __private_extern__ char *
  67 __SCPreferencesPath(CFAllocatorRef      allocator,
  68                     CFStringRef         prefsID,
  69                     Boolean             useNewPrefs)
  70 {
  71         CFStringRef     path            = NULL;
  72         char            *pathStr;
  73
  74         if (prefsID == NULL) {
  75                 /* default preference ID */
  76                 path = CFStringCreateWithFormat(allocator,
  77                                                 NULL,
  78                                                 CFSTR("%@/%@"),
  79                                                 useNewPrefs ? PREFS_DEFAULT_DIR    : PREFS_DEFAULT_DIR_OLD,
  80                                                 useNewPrefs ? PREFS_DEFAULT_CONFIG : PREFS_DEFAULT_CONFIG_OLD);
  81         } else if (CFStringHasPrefix(prefsID, CFSTR("/"))) {
  82                 /* if absolute path */
  83                 path = CFStringCreateCopy(allocator, prefsID);
  84         } else {
  85                 /* relative path */
  86                 path = CFStringCreateWithFormat(allocator,
  87                                                 NULL,
  88                                                 CFSTR("%@/%@"),
  89                                                 useNewPrefs ? PREFS_DEFAULT_DIR : PREFS_DEFAULT_DIR_OLD,
  90                                                 prefsID);
  91                 if (useNewPrefs && CFStringHasSuffix(path, CFSTR(".xml"))) {
  92                         CFMutableStringRef      newPath;
  93
  94                         newPath = CFStringCreateMutableCopy(allocator, 0, path);
  95                         CFStringReplace(newPath,
  96                                         CFRangeMake(CFStringGetLength(newPath)-4, 4),
  97                                         CFSTR(".plist"));
  98                         CFRelease(path);
  99                         path = newPath;
 100                 }
 101         }
 102
 103         /*
 104          * convert CFStringRef path to C-string path
 105          */
 106         pathStr = _SC_cfstring_to_cstring(path, NULL, 0, kCFStringEncodingASCII);
 107         if (pathStr == NULL) {
 108                 CFIndex pathLen;
 109
 110                 pathLen = CFStringGetMaximumSizeOfFileSystemRepresentation(path);
 111                 pathStr = CFAllocatorAllocate(NULL, pathLen, 0);
 112                 if (CFStringGetFileSystemRepresentation(path, pathStr, pathLen) == FALSE) {
 113                         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("could not convert path to C string"));
 114                         CFAllocatorDeallocate(NULL, pathStr);
 115                         pathStr = NULL;
 116                 }
 117         }
 118
 119         CFRelease(path);
 120         return pathStr;
 121 }
 122
 123
 124 __private_extern__
 125 Boolean
 126 __SCPreferencesGetLimitSCNetworkConfiguration(SCPreferencesRef prefs)
 127 {
 128         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
 129
 130         if (prefs == NULL) {
 131                 return FALSE;
 132         }
 133         return prefsPrivate->limit_SCNetworkConfiguration;
 134 }
 135
 136
 137 __private_extern__
 138 Boolean
 139 __SCPreferencesUsingDefaultPrefs(SCPreferencesRef prefs)
 140 {
 141         char                    *curPath;
 142         Boolean                 isDefault = FALSE;
 143         SCPreferencesPrivateRef prefsPrivate = (SCPreferencesPrivateRef)prefs;
 144
 145         curPath = prefsPrivate->newPath ? prefsPrivate->newPath : prefsPrivate->path;
 146         if (curPath != NULL) {
 147                 char*   defPath;
 148
 149                 defPath = __SCPreferencesPath(NULL,
 150                                               NULL,
 151                                               (prefsPrivate->newPath == NULL));
 152                 if (defPath != NULL) {
 153                         if (strcmp(curPath, defPath) == 0) {
 154                                 isDefault = TRUE;
 155                         }
 156                         CFAllocatorDeallocate(NULL, defPath);
 157                 }
 158         }
 159         return isDefault;
 160 }
 161
 162 __private_extern__
 163 SCPreferencesRef
 164 __SCPreferencesCreateNIPrefsFromPrefs(SCPreferencesRef prefs)
 165 {
 166         CFMutableStringRef newPath = NULL;
 167         CFURLRef newURL = NULL;
 168         SCPreferencesRef ni_prefs = NULL;
 169         SCPreferencesPrivateRef prefsPrivate = (SCPreferencesPrivateRef)prefs;
 170         char * prefsPath = __SCPreferencesPath(NULL, prefsPrivate->prefsID, FALSE);
 171
 172
 173         newPath = CFStringCreateMutable(NULL, 0);
 174         CFStringAppendFormat(newPath, NULL, CFSTR("%s"), prefsPath);
 175
 176         CFStringFindAndReplace(newPath, PREFS_DEFAULT_CONFIG,
 177                                NETWORK_INTERFACES_PREFS,
 178                                CFRangeMake(0, CFStringGetLength(newPath)),
 179                                kCFCompareBackwards);
 180
 181         newURL = CFURLCreateWithFileSystemPath(NULL, newPath, kCFURLPOSIXPathStyle, FALSE);
 182         if (CFURLResourceIsReachable(newURL, NULL) == FALSE) {
 183                 ni_prefs = __SCNetworkCreateDefaultNIPrefs(newPath);
 184         }
 185         else {
 186                 ni_prefs = SCPreferencesCreate(NULL, prefsPrivate->name, newPath);
 187         }
 188         CFAllocatorDeallocate(NULL, prefsPath);
 189         CFRelease(newPath);
 190         CFRelease(newURL);
 191
 192         return ni_prefs;
 193 }
 194
 195 CFDataRef
 196 SCPreferencesGetSignature(SCPreferencesRef prefs)
 197 {
 198         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
 199
 200         if (prefs == NULL) {
 201                 /* sorry, you must provide a session */
 202                 _SCErrorSet(kSCStatusNoPrefsSession);
 203                 return NULL;
 204         }
 205
 206         __SCPreferencesAccess(prefs);
 207
 208         return prefsPrivate->signature;
 209 }
 210
 211
 212 __private_extern__ CF_RETURNS_RETAINED CFStringRef
 213 _SCPNotificationKey(CFAllocatorRef      allocator,
 214                     CFStringRef         prefsID,
 215                     int                 keyType)
 216 {
 217         CFStringRef     keyStr;
 218         char            *path;
 219         CFStringRef     pathStr;
 220         CFStringRef     storeKey;
 221
 222         switch (keyType) {
 223                 case kSCPreferencesKeyLock :
 224                         keyStr = CFSTR("lock");
 225                         break;
 226                 case kSCPreferencesKeyCommit :
 227                         keyStr = CFSTR("commit");
 228                         break;
 229                 case kSCPreferencesKeyApply :
 230                         keyStr = CFSTR("apply");
 231                         break;
 232                 default :
 233                         return NULL;
 234         }
 235
 236         path = __SCPreferencesPath(allocator, prefsID, TRUE);
 237         if (path == NULL) {
 238                 return NULL;
 239         }
 240
 241         pathStr = CFStringCreateWithCStringNoCopy(allocator,
 242                                                   path,
 243                                                   kCFStringEncodingASCII,
 244                                                   kCFAllocatorNull);
 245
 246         storeKey = CFStringCreateWithFormat(allocator,
 247                                             NULL,
 248                                             CFSTR("%@%@:%@"),
 249                                             kSCDynamicStoreDomainPrefs,
 250                                             keyStr,
 251                                             pathStr);
 252
 253         CFRelease(pathStr);
 254         CFAllocatorDeallocate(NULL, path);
 255         return storeKey;
 256 }
 257
 258
 259 CFStringRef
 260 SCDynamicStoreKeyCreatePreferences(CFAllocatorRef       allocator,
 261                                    CFStringRef          prefsID,
 262                                    SCPreferencesKeyType keyType)
 263 {
 264         return _SCPNotificationKey(allocator, prefsID, keyType);
 265 }
 266
 267
 268 __private_extern__ void
 269 __SCPreferencesSetLimitSCNetworkConfiguration(SCPreferencesRef  prefs,
 270                                               Boolean           limit_SCNetworkConfiguration)
 271 {
 272         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
 273
 274         if (prefs == NULL) {
 275                 return;
 276         }
 277         prefsPrivate->limit_SCNetworkConfiguration = limit_SCNetworkConfiguration;
 278 }