util: NetworkMonitor helper to detect network state changes
This commit includes only OS X implementation using CoreFoundation framework
Change-Id: I8d5488ec5780e2a33bb20595391208a76b9e69dd
Refs: #2443
diff --git a/src/util/network-monitor.cpp b/src/util/network-monitor.cpp
new file mode 100644
index 0000000..b16e473
--- /dev/null
+++ b/src/util/network-monitor.cpp
@@ -0,0 +1,182 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2015 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ *
+ *
+ * Parts of this implementation is based on daemondo command of MacPorts
+ * (https://www.macports.org/):
+ *
+ * Copyright (c) 2005-2007 James Berry <jberry@macports.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of The MacPorts Project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "ndn-cxx-config.hpp"
+
+#include "network-monitor.hpp"
+#include "scheduler.hpp"
+#include "scheduler-scoped-event-id.hpp"
+
+#if defined(NDN_CXX_HAVE_COREFOUNDATION_COREFOUNDATION_H)
+
+#include <CoreFoundation/CoreFoundation.h>
+#include <SystemConfiguration/SystemConfiguration.h>
+
+namespace ndn {
+namespace util {
+
+class NetworkMonitor::Impl
+{
+public:
+ Impl(boost::asio::io_service& io)
+ : scheduler(io)
+ , cfLoopEvent(scheduler)
+ {
+ }
+
+ void
+ scheduleCfLoop()
+ {
+ // poll each second for new events
+ cfLoopEvent = scheduler.scheduleEvent(time::seconds(1), bind(&Impl::pollCfLoop, this));
+ }
+
+ static void
+ afterNotificationCenterEvent(CFNotificationCenterRef center, void *observer, CFStringRef name,
+ const void *object, CFDictionaryRef userInfo)
+ {
+ static_cast<NetworkMonitor*>(observer)->onNetworkStateChanged();
+ }
+
+private:
+
+ void
+ pollCfLoop()
+ {
+ // this should dispatch ready events and exit
+ CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, true);
+ scheduleCfLoop();
+ }
+
+private:
+ Scheduler scheduler;
+ scheduler::ScopedEventId cfLoopEvent;
+};
+
+NetworkMonitor::NetworkMonitor(boost::asio::io_service& io)
+ : m_impl(new Impl(io))
+{
+ m_impl->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
+
+ // network change observations
+ CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(),
+ static_cast<void*>(this),
+ &NetworkMonitor::Impl::afterNotificationCenterEvent,
+ CFSTR("com.apple.system.config.network_change"),
+ nullptr, // object to observe
+ CFNotificationSuspensionBehaviorDeliverImmediately);
+}
+
+NetworkMonitor::~NetworkMonitor()
+{
+ CFNotificationCenterRemoveEveryObserver(CFNotificationCenterGetDarwinNotifyCenter(),
+ static_cast<void*>(this));
+}
+
+} // namespace util
+} // namespace ndn
+
+// done with defined(NDN_CXX_HAVE_COREFOUNDATION_COREFOUNDATION_H)
+#elif defined(HAVE_DBUS)
+
+namespace ndn {
+namespace util {
+
+NetworkMonitor::NetworkMonitor(boost::asio::io_service&)
+{
+ throw Error("Not implemented yet");
+}
+
+NetworkMonitor::~NetworkMonitor()
+{
+}
+
+} // namespace util
+} // namespace ndn
+
+// done with defined(HAVE_DBUS)
+#else // do not support network monitoring operations
+
+namespace ndn {
+namespace util {
+
+class NetworkMonitor::Impl
+{
+public:
+};
+
+NetworkMonitor::NetworkMonitor(boost::asio::io_service&)
+{
+ throw Error("Network monitoring is not supported on this platform");
+}
+
+NetworkMonitor::~NetworkMonitor()
+{
+}
+
+} // namespace util
+} // namespace ndn
+
+#endif // do not support network monitoring operations