Plugins/SimulatorSupport/simulator_support.c

   1 /*
   2  * Copyright (c) 2013 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  * March 15, 2013               Allan Nathanson <ajn@apple.com>
  28  * - initial revision
  29  */
  30
  31
  32 #include <SystemConfiguration/SystemConfiguration.h>
  33 #include <SystemConfiguration/SCPrivate.h>
  34 #include <SystemConfiguration/SCValidation.h>
  35
  36 #include <dns_sd.h>
  37 #ifndef kDNSServiceCompMulticastDNS
  38 #define kDNSServiceCompMulticastDNS     "MulticastDNS"
  39 #endif
  40 #ifndef kDNSServiceCompPrivateDNS
  41 #define kDNSServiceCompPrivateDNS       "PrivateDNS"
  42 #endif
  43
  44 #include "cache.h"
  45
  46
  47 static Boolean                  _verbose        = FALSE;
  48 static CFMutableArrayRef        mirror_keys     = NULL;
  49 static CFMutableArrayRef        mirror_patterns = NULL;
  50 static SCDynamicStoreRef        store_host      = NULL;
  51 static SCDynamicStoreRef        store_sim       = NULL;
  52
  53
  54 #pragma mark -
  55 #pragma mark iOS Simulator Support
  56
  57
  58 static void
  59 mirror(SCDynamicStoreRef store, CFArrayRef changes, void *info)
  60 {
  61         CFDictionaryRef content_host;
  62         CFDictionaryRef content_sim;
  63         CFIndex         i;
  64         CFIndex         n;
  65
  66         n = CFArrayGetCount(changes);
  67         if (n == 0) {
  68                 // if no changes
  69                 return;
  70         }
  71
  72         // capture "host" content
  73         if (info == NULL) {
  74                 content_host = SCDynamicStoreCopyMultiple(store_host, changes, NULL);
  75         } else {
  76                 content_host = (CFDictionaryRef)info;
  77         }
  78
  79         // capture [current] "sim" content
  80         content_sim = SCDynamicStoreCopyMultiple(store_sim, changes, NULL);
  81
  82         // update
  83         cache_open();
  84         for (i = 0; i < n; i++) {
  85                 CFStringRef             key;
  86                 CFPropertyListRef       val;
  87
  88                 key = CFArrayGetValueAtIndex(changes, i);
  89                 val = (content_host != NULL) ? CFDictionaryGetValue(content_host, key) : NULL;
  90                 if (val != NULL) {
  91                         // if "host" content changed
  92                         cache_SCDynamicStoreSetValue(store_sim, key, val);
  93                 } else {
  94                         // if no "host" content
  95                         val = (content_sim != NULL) ? CFDictionaryGetValue(content_sim, key) : NULL;
  96                         if (val != NULL) {
  97                                 // if we need to remove the "sim" content
  98                                 cache_SCDynamicStoreRemoveValue(store_sim, key);
  99                         } else {
 100                                 // if no "sim" content to remove, just notify
 101                                 cache_SCDynamicStoreNotifyValue(store_sim, key);
 102                         }
 103                 }
 104         }
 105         cache_write(store_sim);
 106         cache_close();
 107
 108         // cleanup
 109         if ((info == NULL) && (content_host != NULL)) {
 110                 CFRelease(content_host);
 111         }
 112         if (content_sim != NULL) {
 113                 CFRelease(content_sim);
 114         }
 115
 116         return;
 117 }
 118
 119
 120 static void
 121 mirror_setup()
 122 {
 123         CFStringRef     key;
 124         CFStringRef     pattern;
 125
 126         mirror_keys     = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
 127         mirror_patterns = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
 128
 129         // Plugin:InterfaceNamer
 130         key = SCDynamicStoreKeyCreate(NULL,
 131                                       CFSTR("%@" "InterfaceNamer"),
 132                                       kSCDynamicStoreDomainPlugin);
 133         CFArrayAppendValue(mirror_keys, key);
 134         CFRelease(key);
 135
 136         // Setup:/System
 137 //      key = SCDynamicStoreKeyCreateComputerName(NULL);
 138 //      CFArrayAppendValue(mirror_keys, key);
 139 //      CFRelease(key);
 140
 141         // Setup:/Network
 142 //      key = SCDynamicStoreKeyCreateHostNames(NULL);
 143 //      CFArrayAppendValue(mirror_keys, key);
 144 //      CFRelease(key);
 145
 146         // Setup:/Network/Global/.*
 147         pattern = SCDynamicStoreKeyCreateNetworkGlobalEntity(NULL,
 148                                                              kSCDynamicStoreDomainSetup,
 149                                                              kSCCompAnyRegex);
 150         CFArrayAppendValue(mirror_patterns, pattern);
 151         CFRelease(pattern);
 152
 153         // Setup:/Network/Service/.*
 154         // State:/Network/Service/.*
 155         pattern = SCDynamicStoreKeyCreateNetworkServiceEntity(NULL,
 156                                                               kSCCompAnyRegex,
 157                                                               CFSTR(".*"),
 158                                                               NULL);
 159         CFArrayAppendValue(mirror_patterns, pattern);
 160         CFRelease(pattern);
 161
 162         // Setup:/Network/Interface/.*
 163         // State:/Network/Interface/.*
 164         pattern = SCDynamicStoreKeyCreateNetworkInterfaceEntity(NULL,
 165                                                                 kSCCompAnyRegex,
 166                                                                 CFSTR(".*"),
 167                                                                 NULL);
 168         CFArrayAppendValue(mirror_patterns, pattern);
 169         CFRelease(pattern);
 170
 171         // State:/Network/MulticastDNS
 172         key = SCDynamicStoreKeyCreate(NULL, CFSTR("%@/%@/%@"),
 173                                       kSCDynamicStoreDomainState,
 174                                       kSCCompNetwork,
 175                                       CFSTR(kDNSServiceCompMulticastDNS));
 176         CFArrayAppendValue(mirror_keys, key);
 177         CFRelease(key);
 178
 179         // State:/Network/PrivateDNS
 180         key = SCDynamicStoreKeyCreate(NULL, CFSTR("%@/%@/%@"),
 181                                       kSCDynamicStoreDomainState,
 182                                       kSCCompNetwork,
 183                                       CFSTR(kDNSServiceCompPrivateDNS));
 184         CFArrayAppendValue(mirror_keys, key);
 185         CFRelease(key);
 186
 187         return;
 188 }
 189
 190
 191 #define N_QUICK 64
 192
 193
 194 __private_extern__
 195 void
 196 prime_SimulatorSupport()
 197 {
 198         CFDictionaryRef content_host;
 199         CFIndex         n;
 200
 201         SCLog(_verbose, LOG_DEBUG, CFSTR("prime() called"));
 202
 203         // copy current content from base OS store to _Sim store
 204         content_host = SCDynamicStoreCopyMultiple(store_host, mirror_keys, mirror_patterns);
 205         CFRelease(mirror_keys);
 206         mirror_keys = NULL;
 207         CFRelease(mirror_patterns);
 208         mirror_patterns = NULL;
 209
 210         if (content_host == NULL) {
 211                 return;
 212         }
 213
 214         n = CFDictionaryGetCount(content_host);
 215         if (n > 0) {
 216                 CFArrayRef      changes;
 217                 const void *    keys_host_q[N_QUICK];
 218                 const void **   keys_host       = keys_host_q;
 219
 220                 if (n > (CFIndex)(sizeof(keys_host_q) / sizeof(CFStringRef))) {
 221                         keys_host = CFAllocatorAllocate(NULL, n * sizeof(CFStringRef), 0);
 222                 }
 223
 224                 CFDictionaryGetKeysAndValues(content_host, keys_host, NULL);
 225
 226                 changes = CFArrayCreate(NULL, keys_host, n, &kCFTypeArrayCallBacks);
 227                 mirror(store_host, changes, (void *)content_host);
 228                 CFRelease(changes);
 229
 230                 if (keys_host != keys_host_q) {
 231                         CFAllocatorDeallocate(NULL, keys_host);
 232                 }
 233         }
 234
 235         CFRelease(content_host);
 236         return;
 237 }
 238
 239
 240 __private_extern__
 241 void
 242 load_SimulatorSupport(CFBundleRef bundle, Boolean bundleVerbose)
 243 {
 244         Boolean                 ok;
 245         CFMutableDictionaryRef  options;
 246         CFRunLoopSourceRef      rls;
 247
 248         if (bundleVerbose) {
 249                 _verbose = TRUE;
 250         }
 251
 252         SCLog(_verbose, LOG_DEBUG, CFSTR("load() called"));
 253         SCLog(_verbose, LOG_DEBUG, CFSTR("  bundle ID = %@"), CFBundleGetIdentifier(bundle));
 254
 255         // setup
 256         mirror_setup();
 257
 258         // setup SCDynamicStore mirroring (from "host")
 259         options = CFDictionaryCreateMutable(NULL,
 260                                             0,
 261                                             &kCFTypeDictionaryKeyCallBacks,
 262                                             &kCFTypeDictionaryValueCallBacks);
 263         CFDictionarySetValue(options, kSCDynamicStoreUseHostServer, kCFBooleanTrue);
 264         store_host = SCDynamicStoreCreateWithOptions(NULL,
 265                                                      CFSTR("SimulatorSupport(host)"),
 266                                                      options,
 267                                                      mirror,
 268                                                      NULL);
 269         CFRelease(options);
 270         assert(store_host != NULL);
 271
 272         ok = SCDynamicStoreSetNotificationKeys(store_host, mirror_keys, mirror_patterns);
 273         assert(ok);
 274
 275         rls = SCDynamicStoreCreateRunLoopSource(NULL, store_host, 0);
 276         assert(rls != NULL);
 277
 278         CFRunLoopAddSource(CFRunLoopGetCurrent(), rls, kCFRunLoopDefaultMode);
 279         CFRelease(rls);
 280
 281         // setup SCDynamicStore mirroring (to "iOS Simulator")
 282         store_sim = SCDynamicStoreCreate(NULL,
 283                                          CFSTR("SimulatorSupport(sim)"),
 284                                          NULL,
 285                                          NULL);
 286
 287         return;
 288 }
 289
 290
 291 #ifdef  MAIN
 292
 293
 294 #pragma mark -
 295 #pragma mark Standalone test code
 296
 297
 298 int
 299 main(int argc, char **argv)
 300 {
 301         _sc_log     = FALSE;
 302         _sc_verbose = (argc > 1) ? TRUE : FALSE;
 303
 304         load_SimulatorSupport(CFBundleGetMainBundle(), (argc > 1) ? TRUE : FALSE);
 305         prime_SimulatorSupport();
 306         CFRunLoopRun();
 307         // not reached
 308         exit(0);
 309         return 0;
 310 }
 311 #endif