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diff --git a/testnet/SimNet.hpp b/testnet/SimNet.hpp
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+/*
+ * ZeroTier One - Global Peer to Peer Ethernet
+ * Copyright (C) 2011-2014  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_SIMNET_HPP
+#define ZT_SIMNET_HPP
+
+#include <map>
+#include <vector>
+
+#include "../node/Constants.hpp"
+#include "../node/InetAddress.hpp"
+#include "../node/Mutex.hpp"
+#include "../node/CMWC4096.hpp"
+
+#include "SimNetSocketManager.hpp"
+
+#define ZT_SIMNET_MAX_TESTNET_SIZE 1048576
+
+namespcae ZeroTier {
+
+/**
+ * A simulated headless IP network for testing
+ */
+class SimNet
+{
+public:
+	SimNet();
+	~SimNet();
+
+	/**
+	 * @return New endpoint with random IP address
+	 */
+	SimNetSocketManager *newEndpoint();
+
+	/**
+	 * @param addr Address to look up
+	 * @return Endpoint or NULL if none
+	 */
+	SimNetSocketManager *get(const InetAddress &addr);
+
+	/**
+	 * @return All socket managers (pointers remain safe while SimNet is running-- these aren't cleaned)
+	 */
+	std::vector<SimNetSocketManager *> all();
+
+private:
+	std::map< InetAddress,SimNetSocketManager > _endpoints;
+	CMWC4096 _prng;
+	Mutex _lock;
+};
+
+} // namespace ZeroTier
+
+#endif