iOS/Pods/Realm/Realm/ObjectStore/src/sync/impl/apple/system_configuration.cpp

   1 ////////////////////////////////////////////////////////////////////////////
   2 //
   3 // Copyright 2017 Realm Inc.
   4 //
   5 // Licensed under the Apache License, Version 2.0 (the "License");
   6 // you may not use this file except in compliance with the License.
   7 // You may obtain a copy of the License at
   8 //
   9 // http://www.apache.org/licenses/LICENSE-2.0
  10 //
  11 // Unless required by applicable law or agreed to in writing, software
  12 // distributed under the License is distributed on an "AS IS" BASIS,
  13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 // See the License for the specific language governing permissions and
  15 // limitations under the License.
  16 //
  17 ////////////////////////////////////////////////////////////////////////////
  18
  19 #include "sync/impl/apple/system_configuration.hpp"
  20
  21 #if NETWORK_REACHABILITY_AVAILABLE
  22
  23 #include <asl.h>
  24 #include "dlfcn.h"
  25
  26 using namespace realm;
  27 using namespace realm::_impl;
  28
  29 SystemConfiguration::SystemConfiguration()
  30 {
  31     m_framework_handle = dlopen("/System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration", RTLD_LAZY);
  32
  33     if (m_framework_handle) {
  34         m_create_with_name = (create_with_name_t)dlsym(m_framework_handle, "SCNetworkReachabilityCreateWithName");
  35         m_create_with_address = (create_with_address_t)dlsym(m_framework_handle, "SCNetworkReachabilityCreateWithAddress");
  36         m_set_dispatch_queue = (set_dispatch_queue_t)dlsym(m_framework_handle, "SCNetworkReachabilitySetDispatchQueue");
  37         m_set_callback = (set_callback_t)dlsym(m_framework_handle, "SCNetworkReachabilitySetCallback");
  38         m_get_flags = (get_flags_t)dlsym(m_framework_handle, "SCNetworkReachabilityGetFlags");
  39     } else {
  40 #pragma clang diagnostic push
  41 #pragma clang diagnostic ignored "-Wdeprecated-declarations"
  42         asl_log(nullptr, nullptr, ASL_LEVEL_WARNING, "network reachability is not available");
  43 #pragma clang diagnostic pop
  44     }
  45 }
  46
  47 SystemConfiguration& SystemConfiguration::shared()
  48 {
  49     static SystemConfiguration system_configuration;
  50
  51     return system_configuration;
  52 }
  53
  54 SCNetworkReachabilityRef SystemConfiguration::network_reachability_create_with_name(CFAllocatorRef allocator,
  55                                                                                     const char *hostname)
  56 {
  57     if (m_create_with_name)
  58         return m_create_with_name(allocator, hostname);
  59
  60     return nullptr;
  61 }
  62
  63 SCNetworkReachabilityRef SystemConfiguration::network_reachability_create_with_address(CFAllocatorRef allocator,
  64                                                                                        const sockaddr *address)
  65 {
  66     if (m_create_with_address)
  67         return m_create_with_address(allocator, address);
  68
  69     return nullptr;
  70 }
  71
  72 bool SystemConfiguration::network_reachability_set_dispatch_queue(SCNetworkReachabilityRef target, dispatch_queue_t queue)
  73 {
  74     if (m_set_dispatch_queue)
  75         return m_set_dispatch_queue(target, queue);
  76
  77     return false;
  78 }
  79
  80 bool SystemConfiguration::network_reachability_set_callback(SCNetworkReachabilityRef target,
  81                                                             SCNetworkReachabilityCallBack callback,
  82                                                             SCNetworkReachabilityContext *context)
  83 {
  84     if (m_set_callback)
  85         return m_set_callback(target, callback, context);
  86
  87     return false;
  88 }
  89
  90 bool SystemConfiguration::network_reachability_get_flags(SCNetworkReachabilityRef target, SCNetworkReachabilityFlags *flags)
  91 {
  92     if (m_get_flags)
  93         return m_get_flags(target, flags);
  94
  95     return false;
  96 }
  97
  98 #endif // NETWORK_REACHABILITY_AVAILABLE