Factoring out packet decoder from Switch to put that object on a little bit of a diet. Work in progress, wont build yet.

node/PacketDecoder.hpp

@@ -0,0 +1,94 @@
+/*
+ * 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_PACKETDECODER_HPP
+#define _ZT_PACKETDECODER_HPP
+
+#include <stdexcept>
+
+#include "Packet.hpp"
+#include "Demarc.hpp"
+#include "InetAddress.hpp"
+#include "Utils.hpp"
+#include "SharedPtr.hpp"
+#include "AtomicCounter.hpp"
+
+namespace ZeroTier {
+
+class RuntimeEnvironment;
+
+/**
+ * Subclass of packet that handles the decoding of it
+ */
+class PacketDecoder : public Packet
+{
+	friend class SharedPtr<PacketDecoder>;
+
+public:
+	template<unsigned int C2>
+	PacketDecoder(const Buffer<C2> &b,Demarc::Port localPort,const InetAddress &remoteAddress)
+ 		throw(std::out_of_range) :
+ 		Packet(b) :
+ 		_receiveTime(Utils::now()),
+ 		_localPort(localPort),
+ 		_remoteAddress(remoteAddress),
+ 		_step(DECODE_STEP_START),
+ 		__refCount()
+	{
+	}
+
+	/**
+	 * Attempt to decode this packet
+	 *
+	 * @param _r Runtime environment
+	 * @return True if decoding and processing is complete, false on failure (try again)
+	 */
+	bool tryDecode(const RuntimeEnvironment *_r)
+		throw(std::out_of_range,std::runtime_error);
+
+	/**
+	 * @return Time of packet receipt
+	 */
+	inline uint64_t receiveTime() const throw() { return _receiveTime; }
+
+private:
+	uint64_t _receiveTime;
+	Demarc::Port _localPort;
+	InetAddress _remoteAddress;
+
+	enum {
+		DECODE_STEP_START,
+		DECODE_STEP_WAITING_FOR_SENDER_LOOKUP, // on initial receipt, we need peer's identity
+		DECODE_STEP_WAITING_FOR_ORIGINAL_SUBMITTER_LOOKUP // this only applies to MULTICAST_FRAME
+	} _step;
+
+	AtomicCounter __refCount;
+};
+
+} // namespace ZeroTier
+
+#endif