Work in progress on cleaning up netconf mess in node code...

node/NetworkConfig.hpp

@@ -0,0 +1,140 @@
+/*
+ * 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_NETWORKCONFIG_HPP
+#define _ZT_NETWORKCONFIG_HPP
+
+#include <set>
+#include <string>
+#include <stdexcept>
+
+#include "Dictionary.hpp"
+#include "InetAddress.hpp"
+#include "AtomicCounter.hpp"
+#include "SharedPtr.hpp"
+
+namespace ZeroTier {
+
+// These are short to fit in packets with plenty of room to spare
+#define ZT_NETWORKCONFIG_DICT_KEY_ALLOWED_ETHERNET_TYPES "et"
+#define ZT_NETWORKCONFIG_DICT_KEY_NETWORK_ID "nwid"
+#define ZT_NETWORKCONFIG_DICT_KEY_TIMESTAMP "ts"
+#define ZT_NETWORKCONFIG_DICT_KEY_ISSUED_TO "id"
+#define ZT_NETWORKCONFIG_DICT_KEY_MULTICAST_PREFIX_BITS "mpb"
+#define ZT_NETWORKCONFIG_DICT_KEY_MULTICAST_DEPTH "md"
+#define ZT_NETWORKCONFIG_DICT_KEY_ARP_CACHE_TTL "cARP"
+#define ZT_NETWORKCONFIG_DICT_KEY_NDP_CACHE_TTL "cNDP"
+#define ZT_NETWORKCONFIG_DICT_KEY_EMULATE_ARP "eARP"
+#define ZT_NETWORKCONFIG_DICT_KEY_EMULATE_NDP "eNDP"
+#define ZT_NETWORKCONFIG_DICT_KEY_IS_OPEN "o"
+#define ZT_NETWORKCONFIG_DICT_KEY_NAME "name"
+#define ZT_NETWORKCONFIG_DICT_KEY_DESC "desc"
+#define ZT_NETWORKCONFIG_DICT_KEY_IPV4_STATIC "v4s"
+#define ZT_NETWORKCONFIG_DICT_KEY_IPV6_STATIC "v6s"
+#define ZT_NETWORKCONFIG_DICT_KEY_MULTICAST_RATES "mr"
+
+/**
+ * Network configuration received from netconf master nodes
+ *
+ * This is designed to work as an immutable value object held in a shared
+ * pointer so that it can be both updated and used without too much mutex
+ * boogie.
+ */
+class NetworkConfig
+{
+public:
+	friend class SharedPtr<NetworkConfig>;
+
+	/**
+	 * @param d Dictionary containing configuration
+	 * @throws std::invalid_argument Invalid configuration
+	 */
+	NetworkConfig(const Dictionary &d)
+		throw(std::invalid_argument)
+	{
+		_fromDictionary(d);
+	}
+
+	/**
+	 * @param etherType Ethernet frame type to check
+	 * @return True if allowed on this network
+	 */
+	inline bool allowsEtherType(unsigned int etherType)
+		throw()
+	{
+		if ((!etherType)||(etherType > 0xffff)) // sanity checks
+			return false;
+		else if ((_etWhitelist[0] & 1)) // prsence of 0 in set inverts sense: whitelist becomes blacklist
+			return (!(_etWhitelist[etherType >> 3] & (1 << (etherType & 7))));
+		else return ((_etWhitelist[etherType >> 3] & (1 << (etherType & 7))));
+	}
+
+	std::set<unsigned int> allowedEtherTypes() const;
+	inline uint64_t networkId() const throw() { return _nwid; }
+	inline uint64_t timestamp() const throw() { return _timestamp; }
+	inline const Address &issuedTo() const throw() { return _issuedTo; }
+	inline unsigned int multicastPrefixBits() const throw() { return _multicastPrefixBits; }
+	inline unsigned int multicastDepth() const throw() { return _multicastDepth; }
+	inline unsigned int arpCacheTtl() const throw() { return _arpCacheTtl; }
+	inline unsigned int ndpCacheTtl() const throw() { return _ndpCacheTtl; }
+	inline bool emulateArp() const throw() { return _emulateArp; }
+	inline bool emulateNdp() const throw() { return _emulateNdp; }
+	inline bool isOpen() const throw() { return _isOpen; }
+	inline const std::string &name() const throw() { return _name; }
+	inline const std::string &description() const throw() { return _description; }
+	inline const std::set<InetAddress> &staticIps() const throw() { return _staticIps; }
+	inline const MulticastRateTable &multicastRates() const throw() { return _multicastRates; }
+
+private:
+	NetworkConfig() {}
+	~NetworkConfig() {}
+
+	void _fromDictionary(const Dictionary &d)
+		throw(std::invalid_argument);
+
+	unsigned char _etWhitelist[65536 / 8];
+	uint64_t _nwid;
+	uint64_t _timestamp;
+	Address _issuedTo;
+	unsigned int _multicastPrefixBits;
+	unsigned int _multicastDepth;
+	unsigned int _arpCacheTtl;
+	unsigned int _ndpCacheTtl;
+	bool _emulateArp;
+	bool _emulateNdp;
+	bool _isOpen;
+	std::string _name;
+	std::string _description;
+	std::set<InetAddress> _staticIps;
+	MulticastRateTable _multicastRates;
+
+	AtomicCounter __refCount;
+};
+
+} // namespace ZeroTier
+
+#endif