network-monitor-impl-osx.cpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#include "ndn-cxx-config.hpp"

#ifdef NDN_CXX_HAVE_COREFOUNDATION_COREFOUNDATION_H

#include "network-monitor-impl-osx.hpp"

namespace ndn {
namespace util {

NetworkMonitor::Impl::Impl(NetworkMonitor& nm, boost::asio::io_service& io)
  : m_nm(nm)
  , m_scheduler(io)
  , m_cfLoopEvent(m_scheduler)
{
  scheduleCfLoop();

  // Potentially useful System Configuration regex patterns:
  //
  // State:/Network/Interface/.*/Link
  // State:/Network/Interface/.*/IPv4
  // State:/Network/Interface/.*/IPv6
  //
  // State:/Network/Global/DNS
  // State:/Network/Global/IPv4
  //
  // Potentially useful notifications from Darwin Notify Center:
  //
  // com.apple.system.config.network_change
  //
  CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(),
                                  static_cast<void*>(this),
                                  &Impl::afterNotificationCenterEvent,
                                  CFSTR("com.apple.system.config.network_change"),
                                  nullptr, // object to observe
                                  CFNotificationSuspensionBehaviorDeliverImmediately);
}

NetworkMonitor::Impl::~Impl()
{
  CFNotificationCenterRemoveEveryObserver(CFNotificationCenterGetDarwinNotifyCenter(),
                                          static_cast<void*>(this));
}

void
NetworkMonitor::Impl::afterNotificationCenterEvent(CFNotificationCenterRef center,
                                                   void *observer,
                                                   CFStringRef name,
                                                   const void *object,
                                                   CFDictionaryRef userInfo)
{
  static_cast<Impl*>(observer)->m_nm.onNetworkStateChanged();
}

void
NetworkMonitor::Impl::scheduleCfLoop()
{
  // poll each second for new events
  m_cfLoopEvent = m_scheduler.scheduleEvent(time::seconds(1), bind(&Impl::pollCfLoop, this));
}

void
NetworkMonitor::Impl::pollCfLoop()
{
  // this should dispatch ready events and exit
  CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, true);

  scheduleCfLoop();
}

} // namespace util
} // namespace ndn

#endif // NDN_CXX_HAVE_COREFOUNDATION_COREFOUNDATION_H