configd.tproj/_notifyadd.c

   1 /*
   2  * Copyright (c) 2000-2003 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 24, 2000               Allan Nathanson <ajn@apple.com>
  31  * - initial revision
  32  */
  33
  34 #include "configd.h"
  35 #include "session.h"
  36 #include "pattern.h"
  37
  38
  39 static __inline__ void
  40 my_CFSetApplyFunction(CFSetRef                  theSet,
  41                       CFSetApplierFunction      applier,
  42                       void                      *context)
  43 {
  44         CFAllocatorRef  myAllocator;
  45         CFSetRef        mySet;
  46
  47         myAllocator = CFGetAllocator(theSet);
  48         mySet       = CFSetCreateCopy(myAllocator, theSet);
  49         CFSetApplyFunction(mySet, applier, context);
  50         CFRelease(mySet);
  51         return;
  52 }
  53
  54
  55 __private_extern__
  56 int
  57 __SCDynamicStoreAddWatchedKey(SCDynamicStoreRef store, CFStringRef key, Boolean isRegex, Boolean internal)
  58 {
  59         int                             sc_status       = kSCStatusOK;
  60         CFNumberRef                     sessionNum      = NULL;
  61         SCDynamicStorePrivateRef        storePrivate    = (SCDynamicStorePrivateRef)store;
  62
  63         if (!store || (storePrivate->server == MACH_PORT_NULL)) {
  64                 return kSCStatusNoStoreSession; /* you must have an open session to play */
  65         }
  66
  67         if (_configd_trace) {
  68                 SCTrace(TRUE, _configd_trace,
  69                         CFSTR("%s : %5d : %s : %@\n"),
  70                         internal ? "*watch+" : "watch+ ",
  71                         storePrivate->server,
  72                         isRegex  ? "pattern" : "key",
  73                         key);
  74         }
  75
  76         sessionNum = CFNumberCreate(NULL, kCFNumberIntType, &storePrivate->server);
  77
  78         if (isRegex) {
  79                 if (CFSetContainsValue(storePrivate->patterns, key)) {
  80                         /* sorry, pattern already exists in notifier list */
  81                         sc_status = kSCStatusKeyExists;
  82                         goto done;
  83                 }
  84
  85                 /*
  86                  * add this session as a pattern watcher
  87                  */
  88                 if (!patternAddSession(key, sessionNum)) {
  89                         sc_status = kSCStatusInvalidArgument;
  90                         goto done;
  91                 }
  92
  93                 /* add pattern to this sessions notifier list */
  94                 CFSetAddValue(storePrivate->patterns, key);
  95         } else {
  96                 if (CFSetContainsValue(storePrivate->keys, key)) {
  97                         /* sorry, key already exists in notifier list */
  98                         sc_status = kSCStatusKeyExists;
  99                         goto done;
 100                 }
 101
 102                 /*
 103                  * We are watching a specific key. As such, update the
 104                  * store to mark our interest in any changes.
 105                  */
 106                 _addWatcher(sessionNum, key);
 107
 108                 /* add key to this sessions notifier list */
 109                 CFSetAddValue(storePrivate->keys, key);
 110         }
 111
 112     done :
 113
 114         if (sessionNum) CFRelease(sessionNum);
 115         return sc_status;
 116 }
 117
 118
 119 __private_extern__
 120 kern_return_t
 121 _notifyadd(mach_port_t                  server,
 122            xmlData_t                    keyRef,         /* raw XML bytes */
 123            mach_msg_type_number_t       keyLen,
 124            int                          isRegex,
 125            int                          *sc_status
 126 )
 127 {
 128         CFStringRef             key             = NULL; /* key  (un-serialized) */
 129         serverSessionRef        mySession       = getSession(server);
 130
 131         /* un-serialize the key */
 132         if (!_SCUnserializeString(&key, NULL, (void *)keyRef, keyLen)) {
 133                 *sc_status = kSCStatusFailed;
 134                 goto done;
 135         }
 136
 137         if (!isA_CFString(key)) {
 138                 *sc_status = kSCStatusInvalidArgument;
 139                 goto done;
 140         }
 141
 142         if (!mySession) {
 143                 *sc_status = kSCStatusNoStoreSession;   /* you must have an open session to play */
 144                 goto done;
 145         }
 146
 147         *sc_status = __SCDynamicStoreAddWatchedKey(mySession->store, key, isRegex != 0, FALSE);
 148
 149     done :
 150
 151         if (key)        CFRelease(key);
 152         return KERN_SUCCESS;
 153 }
 154
 155
 156 /*
 157  * "context" argument for removeOldKey() and addNewKey()
 158  */
 159 typedef struct {
 160         SCDynamicStoreRef       store;
 161         CFSetRef                oldKeys;        /* for addNewKey */
 162         CFArrayRef              newKeys;        /* for removeOldKey */
 163         Boolean                 isRegex;
 164         int                     sc_status;
 165 } updateKeysContext, *updateKeysContextRef;
 166
 167
 168 static void
 169 removeOldKey(const void *value, void *context)
 170 {
 171         CFStringRef                     oldKey          = (CFStringRef)value;
 172         updateKeysContextRef            myContextRef    = (updateKeysContextRef)context;
 173
 174         if (myContextRef->sc_status != kSCStatusOK) {
 175                 return;
 176         }
 177
 178         if (!myContextRef->newKeys ||
 179             !CFArrayContainsValue(myContextRef->newKeys,
 180                                   CFRangeMake(0, CFArrayGetCount(myContextRef->newKeys)),
 181                                   oldKey)) {
 182                 /* the old notification key is not being retained, remove it */
 183                 myContextRef->sc_status = __SCDynamicStoreRemoveWatchedKey(myContextRef->store,
 184                                                                            oldKey,
 185                                                                            myContextRef->isRegex,
 186                                                                            TRUE);
 187         }
 188
 189         return;
 190 }
 191
 192
 193 static void
 194 addNewKey(const void *value, void *context)
 195 {
 196         CFStringRef                     newKey          = (CFStringRef)value;
 197         updateKeysContextRef            myContextRef    = (updateKeysContextRef)context;
 198
 199         if (myContextRef->sc_status != kSCStatusOK) {
 200                 return;
 201         }
 202
 203         if (!myContextRef->oldKeys ||
 204             !CFSetContainsValue(myContextRef->oldKeys, newKey)) {
 205                 /* if this is a new notification key */
 206                 myContextRef->sc_status = __SCDynamicStoreAddWatchedKey(myContextRef->store,
 207                                                                         newKey,
 208                                                                         myContextRef->isRegex,
 209                                                                         TRUE);
 210         }
 211
 212         return;
 213 }
 214
 215
 216 __private_extern__
 217 int
 218 __SCDynamicStoreSetNotificationKeys(SCDynamicStoreRef store, CFArrayRef keys, CFArrayRef patterns)
 219 {
 220         updateKeysContext               myContext;
 221         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
 222
 223         if (!store || (storePrivate->server == MACH_PORT_NULL)) {
 224                 return kSCStatusNoStoreSession; /* you must have an open session to play */
 225         }
 226
 227         if (_configd_trace) {
 228                 SCTrace(TRUE, _configd_trace,
 229                         CFSTR("watch   : %5d : %d keys, %d patterns\n"),
 230                         storePrivate->server,
 231                         keys     ? CFArrayGetCount(keys)     : 0,
 232                         patterns ? CFArrayGetCount(patterns) : 0);
 233         }
 234
 235         myContext.store     = store;
 236         myContext.sc_status = kSCStatusOK;
 237
 238         /* remove any previously registered keys, register any new keys */
 239         myContext.oldKeys = CFSetCreateCopy(NULL, storePrivate->keys);
 240         myContext.newKeys = keys;
 241         myContext.isRegex = FALSE;
 242         my_CFSetApplyFunction(storePrivate->keys, removeOldKey, &myContext);
 243         if (keys) {
 244                 CFArrayApplyFunction(keys,
 245                                      CFRangeMake(0, CFArrayGetCount(keys)),
 246                                      addNewKey,
 247                                      &myContext);
 248         }
 249         CFRelease(myContext.oldKeys);
 250
 251         /* remove any previously registered patterns, register any new patterns */
 252         myContext.oldKeys = CFSetCreateCopy(NULL, storePrivate->patterns);
 253         myContext.newKeys = patterns;
 254         myContext.isRegex = TRUE;
 255         my_CFSetApplyFunction(storePrivate->patterns, removeOldKey, &myContext);
 256         if (patterns) {
 257                 CFArrayApplyFunction(patterns,
 258                                      CFRangeMake(0, CFArrayGetCount(patterns)),
 259                                      addNewKey,
 260                                      &myContext);
 261         }
 262         CFRelease(myContext.oldKeys);
 263
 264         return myContext.sc_status;
 265 }
 266
 267
 268 __private_extern__
 269 kern_return_t
 270 _notifyset(mach_port_t                  server,
 271            xmlData_t                    keysRef,                /* raw XML bytes */
 272            mach_msg_type_number_t       keysLen,
 273            xmlData_t                    patternsRef,            /* raw XML bytes */
 274            mach_msg_type_number_t       patternsLen,
 275            int                          *sc_status
 276 )
 277 {
 278         CFArrayRef              keys            = NULL; /* key (un-serialized) */
 279         serverSessionRef        mySession       = getSession(server);
 280         CFArrayRef              patterns        = NULL; /* patterns (un-serialized) */
 281
 282         *sc_status = kSCStatusOK;
 283
 284         if (keysRef && (keysLen > 0)) {
 285                 /* un-serialize the keys */
 286                 if (!_SCUnserialize((CFPropertyListRef *)&keys, NULL, (void *)keysRef, keysLen)) {
 287                         *sc_status = kSCStatusFailed;
 288                 } else if (!isA_CFArray(keys)) {
 289                         *sc_status = kSCStatusInvalidArgument;
 290                 }
 291         }
 292
 293         if (patternsRef && (patternsLen > 0)) {
 294                 /* un-serialize the patterns */
 295                 if (!_SCUnserialize((CFPropertyListRef *)&patterns, NULL, (void *)patternsRef, patternsLen)) {
 296                         *sc_status = kSCStatusFailed;
 297                 } else if (!isA_CFArray(patterns)) {
 298                         *sc_status = kSCStatusInvalidArgument;
 299                 }
 300         }
 301
 302         if (!mySession) {
 303                 /* you must have an open session to play */
 304                 *sc_status = kSCStatusNoStoreSession;
 305         }
 306
 307         if (*sc_status == kSCStatusOK) {
 308                 *sc_status = __SCDynamicStoreSetNotificationKeys(mySession->store, keys, patterns);
 309         }
 310
 311         if (keys)       CFRelease(keys);
 312         if (patterns)   CFRelease(patterns);
 313
 314         return KERN_SUCCESS;
 315 }