Bunch of work in progress on new socket multiplexer and plumbing for TCP jailbreaking... Don't try to build, won't yet.

node/Socket.hpp

@@ -0,0 +1,139 @@
+/*
+ * 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_SOCKET_HPP
+#define ZT_SOCKET_HPP
+
+#include <list>
+
+#include "Constants.hpp"
+#include "InetAddress.hpp"
+#include "AtomicCounter.hpp"
+#include "SharedPtr.hpp"
+#include "NonCopyable.hpp"
+
+#ifdef __WINDOWS__
+#include <WinSock2.h>
+#include <WS2tcpip.h>
+#include <Windows.h>
+#endif
+
+/**
+ * Maximum discrete message length supported by all socket types
+ */
+#define ZT_SOCKET_MAX_MESSAGE_LEN 4096
+
+namespace ZeroTier {
+
+class SocketManager;
+
+/**
+ * Base class of all socket types
+ *
+ * Socket implementations are tightly bound to SocketManager.
+ */
+class Socket : NonCopyable
+{
+	friend class SharedPtr<Socket>;
+	friend class SocketManager;
+
+public:
+	enum Type
+	{
+		ZT_SOCKET_TYPE_UDP_V4,
+		ZT_SOCKET_TYPE_UDP_V6,
+		ZT_SOCKET_TYPE_TCP
+	};
+
+	virtual ~Socket() {}
+
+	/**
+	 * @return Socket type
+	 */
+	inline Type type() const
+		throw()
+	{
+		return _type;
+	}
+
+	/**
+	 * @return True if this is a TCP socket
+	 */
+	inline bool isTCP() const
+		throw()
+	{
+		return (_type == ZT_SOCKET_TYPE_TCP);
+	}
+
+	/**
+	 * @return True if socket is available for sending/receiving of data
+	 */
+	virtual bool isOpen() const = 0;
+
+	/**
+	 * Send a ZeroTier message packet
+	 *
+	 * @param to Destination address (ignored in connected TCP sockets)
+	 * @param msg Message data
+	 * @param msglen Message length (max 16384 bytes)
+	 * @return True if send appears successful on our end, false if e.g. address type unreachable from this socket
+	 */
+	virtual bool send(const InetAddress &to,const void *msg,unsigned int msglen) = 0;
+
+protected:
+	// Called only by SocketManager, should return false if socket is no longer open/valid (e.g. connection drop or other fatal error)
+	virtual bool notifyAvailableForRead(const SharedPtr<Socket> &self,SocketManager *sm) = 0;
+	virtual bool notifyAvailableForWrite(const SharedPtr<Socket> &self,SocketManager *sm) = 0;
+
+private:
+#ifdef __WINDOWS__
+	Socket(Type t,SOCKET sock) :
+		_sock(sock),
+		_type(t)
+	{
+	}
+#else
+	Socket(Type t,int sock) :
+		_sock(sock),
+		_type(t)
+	{
+	}
+#endif
+
+#ifdef __WINDOWS__
+	SOCKET _sock;
+#else
+	int _sock;
+#endif
+	Type _type;
+
+	AtomicCounter __refCount;
+};
+
+}; // namespace ZeroTier
+
+#endif