SystemConfiguration.fproj/CaptiveNetwork.c

   1 /*
   2  * Copyright (c) 2009, 2010, 2012, 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 #include <sys/types.h>
  26 #include <sys/param.h>
  27 #include <sys/stat.h>
  28 #include <dlfcn.h>
  29
  30 #include <SystemConfiguration/CaptiveNetwork.h>
  31
  32
  33 #pragma mark -
  34 #pragma mark CaptiveNetwork.framework APIs (exported through the SystemConfiguration.framework)
  35
  36
  37 #if     TARGET_OS_IPHONE
  38 const CFStringRef kCNNetworkInfoKeySSIDData    = CFSTR("SSIDDATA");
  39 const CFStringRef kCNNetworkInfoKeySSID        = CFSTR("SSID");
  40 const CFStringRef kCNNetworkInfoKeyBSSID       = CFSTR("BSSID");
  41 #endif  // TARGET_OS_IPHONE
  42
  43
  44 static void *
  45 __loadCaptiveNetwork(void) {
  46         static void *image = NULL;
  47         if (NULL == image) {
  48                 const char      *framework              = "/System/Library/PrivateFrameworks/CaptiveNetwork.framework/CaptiveNetwork";
  49                 struct stat     statbuf;
  50                 const char      *suffix                 = getenv("DYLD_IMAGE_SUFFIX");
  51                 char            path[MAXPATHLEN];
  52
  53                 strlcpy(path, framework, sizeof(path));
  54                 if (suffix) strlcat(path, suffix, sizeof(path));
  55                 if (0 <= stat(path, &statbuf)) {
  56                         image = dlopen(path, RTLD_LAZY | RTLD_LOCAL);
  57                 } else {
  58                         image = dlopen(framework, RTLD_LAZY | RTLD_LOCAL);
  59                 }
  60         }
  61         return (void *)image;
  62 }
  63
  64
  65 Boolean
  66 CNSetSupportedSSIDs(CFArrayRef ssidArray)
  67 {
  68         static typeof (CNSetSupportedSSIDs) *dyfunc = NULL;
  69         if (!dyfunc) {
  70                 void *image = __loadCaptiveNetwork();
  71                 if (image) dyfunc = dlsym(image, "__CNSetSupportedSSIDs");
  72         }
  73         return dyfunc ? dyfunc(ssidArray) : FALSE;
  74 }
  75
  76
  77 Boolean
  78 CNMarkPortalOnline(CFStringRef interfaceName)
  79 {
  80         static typeof (CNMarkPortalOnline) *dyfunc = NULL;
  81         if (!dyfunc) {
  82                 void *image = __loadCaptiveNetwork();
  83                 if (image) dyfunc = dlsym(image, "__CNMarkPortalOnline");
  84         }
  85         return dyfunc ? dyfunc(interfaceName) : FALSE;
  86 }
  87
  88
  89 Boolean
  90 CNMarkPortalOffline(CFStringRef interfaceName)
  91 {
  92         static typeof (CNMarkPortalOffline) *dyfunc = NULL;
  93         if (!dyfunc) {
  94                 void *image = __loadCaptiveNetwork();
  95                 if (image) dyfunc = dlsym(image, "__CNMarkPortalOffline");
  96         }
  97         return dyfunc ? dyfunc(interfaceName) : FALSE;
  98 }
  99
 100 CFArrayRef
 101 CNCopySupportedInterfaces(void)
 102 {
 103         static typeof (CNCopySupportedInterfaces) *dyfunc = NULL;
 104         if (!dyfunc) {
 105                 void *image = __loadCaptiveNetwork();
 106                 if (image) dyfunc = dlsym(image, "__CNCopySupportedInterfaces");
 107         }
 108         return dyfunc ? dyfunc() : NULL;
 109 }
 110
 111
 112 #if     TARGET_OS_IPHONE
 113 CFDictionaryRef
 114 CNCopyCurrentNetworkInfo(CFStringRef    interfaceName)
 115 {
 116         static typeof (CNCopyCurrentNetworkInfo) *dyfunc = NULL;
 117         if (!dyfunc) {
 118                 void *image = __loadCaptiveNetwork();
 119                 if (image) dyfunc = dlsym(image, "__CNCopyCurrentNetworkInfo");
 120         }
 121         return dyfunc ? dyfunc(interfaceName) : NULL;
 122 }
 123 #endif  // TARGET_OS_IPHONE