SystemConfiguration.fproj/CaptiveNetwork.c

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