SystemConfiguration.fproj/CaptiveNetwork.c

   1 /*
   2  * Copyright (c) 2009, 2010, 2012, 2013, 2015, 2018, 2019, 2020 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 #include <SystemConfiguration/CaptiveNetwork.h>
  30 #include <SystemConfiguration/SCPrivate.h>
  31
  32 #pragma mark -
  33 #pragma mark CaptiveNetwork.framework APIs (exported through the SystemConfiguration.framework)
  34
  35 const CFStringRef kCNNetworkInfoKeySSIDData    = CFSTR("SSIDDATA");
  36 const CFStringRef kCNNetworkInfoKeySSID        = CFSTR("SSID");
  37 const CFStringRef kCNNetworkInfoKeyBSSID       = CFSTR("BSSID");
  38
  39 static void *
  40 __loadCaptiveNetwork(void) {
  41         static void             *image  = NULL;
  42         static dispatch_once_t  once;
  43
  44         dispatch_once(&once, ^{
  45                 image = _SC_dlopen("/System/Library/PrivateFrameworks/CaptiveNetwork.framework/CaptiveNetwork");
  46         });
  47
  48         return image;
  49 }
  50
  51 Boolean
  52 CNSetSupportedSSIDs(CFArrayRef ssidArray)
  53 {
  54         static typeof (CNSetSupportedSSIDs) *dyfunc = NULL;
  55         if (!dyfunc) {
  56                 void *image = __loadCaptiveNetwork();
  57                 if (image) dyfunc = dlsym(image, "__CNSetSupportedSSIDs");
  58         }
  59         return dyfunc ? dyfunc(ssidArray) : FALSE;
  60 }
  61
  62 Boolean
  63 CNMarkPortalOnline(CFStringRef interfaceName)
  64 {
  65         static typeof (CNMarkPortalOnline) *dyfunc = NULL;
  66         if (!dyfunc) {
  67                 void *image = __loadCaptiveNetwork();
  68                 if (image) dyfunc = dlsym(image, "__CNMarkPortalOnline");
  69         }
  70         return dyfunc ? dyfunc(interfaceName) : FALSE;
  71 }
  72
  73 Boolean
  74 CNMarkPortalOffline(CFStringRef interfaceName)
  75 {
  76         static typeof (CNMarkPortalOffline) *dyfunc = NULL;
  77         if (!dyfunc) {
  78                 void *image = __loadCaptiveNetwork();
  79                 if (image) dyfunc = dlsym(image, "__CNMarkPortalOffline");
  80         }
  81         return dyfunc ? dyfunc(interfaceName) : FALSE;
  82 }
  83
  84 CFArrayRef
  85 CNCopySupportedInterfaces(void)
  86 {
  87         static typeof (CNCopySupportedInterfaces) *dyfunc = NULL;
  88         if (!dyfunc) {
  89                 void *image = __loadCaptiveNetwork();
  90                 if (image) dyfunc = dlsym(image, "__CNCopySupportedInterfaces");
  91         }
  92         return dyfunc ? dyfunc() : NULL;
  93 }
  94
  95 CFDictionaryRef
  96 CNCopyCurrentNetworkInfo(CFStringRef interfaceName)
  97 {
  98         static typeof (CNCopyCurrentNetworkInfo) *dyfunc = NULL;
  99         if (!dyfunc) {
 100                 void *image = __loadCaptiveNetwork();
 101                 if (image) dyfunc = dlsym(image, "__CNCopyCurrentNetworkInfo");
 102         }
 103         return dyfunc ? dyfunc(interfaceName) : NULL;
 104 }
 105