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diff --git a/node/NodeConfig.hpp b/node/NodeConfig.hpp
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+/*
+ * ZeroTier One - Global Peer to Peer Ethernet
+ * Copyright (C) 2012-2013  ZeroTier Networks LLC
+ *
+ * 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_NODECONFIG_HPP
+#define _ZT_NODECONFIG_HPP
+
+#include <map>
+#include <set>
+#include <string>
+#include <stdint.h>
+#include "SharedPtr.hpp"
+#include "Network.hpp"
+#include "Utils.hpp"
+#include "Http.hpp"
+
+namespace ZeroTier {
+
+class RuntimeEnvironment;
+
+/**
+ * Node configuration holder and fetcher
+ */
+class NodeConfig
+{
+public:
+	/**
+	 * @param renv Runtime environment
+	 * @param url Autoconfiguration URL (http:// or file://)
+	 */
+	NodeConfig(const RuntimeEnvironment *renv,const std::string &url);
+
+	~NodeConfig();
+
+	/**
+	 * @param nwid Network ID
+	 * @return Network or NULL if no network for that ID
+	 */
+	inline SharedPtr<Network> network(uint64_t nwid) const
+	{
+		Mutex::Lock _l(_networks_m);
+		std::map< uint64_t,SharedPtr<Network> >::const_iterator n(_networks.find(nwid));
+		return ((n == _networks.end()) ? SharedPtr<Network>() : n->second);
+	}
+
+	/**
+	 * @return Vector containing all networks
+	 */
+	inline std::vector< SharedPtr<Network> > networks() const
+	{
+		std::vector< SharedPtr<Network> > nwlist;
+		Mutex::Lock _l(_networks_m);
+		for(std::map< uint64_t,SharedPtr<Network> >::const_iterator n(_networks.begin());n!=_networks.end();++n)
+			nwlist.push_back(n->second);
+		return nwlist;
+	}
+
+	/**
+	 * @param nwid Network ID
+	 * @return True if this network exists
+	 */
+	inline bool hasNetwork(uint64_t nwid)
+	{
+		Mutex::Lock _l(_networks_m);
+		return (_networks.count(nwid) > 0);
+	}
+
+	/**
+	 * @return Set of network tap device names
+	 */
+	inline std::set<std::string> networkTapDeviceNames() const
+	{
+		std::set<std::string> tapDevs;
+		Mutex::Lock _l(_networks_m);
+		for(std::map< uint64_t,SharedPtr<Network> >::const_iterator n(_networks.begin());n!=_networks.end();++n)
+			tapDevs.insert(n->second->tap().deviceName());
+		return tapDevs;
+	}
+
+	/**
+	 * @return Time of last successful autoconfigure or refresh
+	 */
+	inline uint64_t lastAutoconfigure() const { return _lastAutoconfigure; }
+
+	/**
+	 * @return Autoconfiguration URL
+	 */
+	inline const std::string &url() const { return _url; }
+
+	/**
+	 * Refresh configuration from autoconf URL
+	 */
+	void refreshConfiguration();
+
+private:
+	void __CBautoconfHandler(const std::string &lastModified,const std::string &body);
+	static bool _CBautoconfHandler(Http::Request *req,void *arg,const std::string &url,int code,const std::map<std::string,std::string> &headers,const std::string &body);
+
+	const RuntimeEnvironment *_r;
+
+	volatile uint64_t _lastAutoconfigure;
+
+	std::string _lastAutoconfigureLastModified;
+	std::string _url;
+	Mutex _autoconfigureLock;
+
+	std::map< uint64_t,SharedPtr<Network> > _networks;
+	Mutex _networks_m;
+};
+
+} // namespace ZeroTier
+
+#endif