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diff --git a/osdep/UPNPClient.hpp b/osdep/UPNPClient.hpp
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+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2015  ZeroTier, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * --
+ *
+ * ZeroTier may be used and distributed under the terms of the GPLv3, which
+ * are available at: http://www.gnu.org/licenses/gpl-3.0.html
+ *
+ * If you would like to embed ZeroTier into a commercial application or
+ * redistribute it in a modified binary form, please contact ZeroTier Networks
+ * LLC. Start here: http://www.zerotier.com/
+ */
+
+#ifndef ZT_UPNPCLIENT_HPP
+#define ZT_UPNPCLIENT_HPP
+
+#ifdef ZT_USE_MINIUPNPC
+
+#include <vector>
+
+#include "../node/Constants.hpp"
+#include "../node/InetAddress.hpp"
+#include "../node/Mutex.hpp"
+#include "Thread.hpp"
+
+/**
+ * How frequently should we refresh our UPNP/NAT-PnP/whatever state?
+ */
+#define ZT_UPNP_CLIENT_REFRESH_DELAY 600000
+
+/**
+ * UPNP lease duration in seconds (as string)
+ */
+#define ZT_UPNP_LEASE_DURATION "3600"
+
+namespace ZeroTier {
+
+class UPNPClientImpl;
+
+/**
+ * UPnP/NAT-PnP daemon thread
+ */
+class UPNPClient
+{
+	friend class UPNPClientImpl;
+
+public:
+	/**
+	 * Create and start UPNP client service
+	 *
+	 * @param localUdpPortToMap Port we want visible to the outside world
+	 */
+	UPNPClient(int localUdpPortToMap);
+
+	~UPNPClient();
+
+	/**
+	 * @return All current external mappings for our port
+	 */
+	std::vector<InetAddress> get() const;
+
+private:
+	UPNPClientImpl *_impl;
+};
+
+} // namespace ZeroTier
+
+#endif // ZT_USE_MINIUPNPC
+
+#endif