New clustering work.

attic/DBM.hpp

@@ -0,0 +1,168 @@
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2017  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * 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/>.
+ *
+ * --
+ *
+ * You can be released from the requirements of the license by purchasing
+ * a commercial license. Buying such a license is mandatory as soon as you
+ * develop commercial closed-source software that incorporates or links
+ * directly against ZeroTier software without disclosing the source code
+ * of your own application.
+ */
+
+#ifndef ZT_DBM_HPP___
+#define ZT_DBM_HPP___
+
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <stdexcept>
+
+#include "../node/Constants.hpp"
+#include "../node/Mutex.hpp"
+#include "../node/Utils.hpp"
+#include "../node/Identity.hpp"
+#include "../node/Peer.hpp"
+
+#include "../ext/vsdm/vsdm.hpp"
+
+// The Peer is the largest structure we persist here
+#define ZT_DBM_MAX_VALUE_SIZE sizeof(Peer)
+
+namespace ZeroTier {
+
+class Node;
+class DBM;
+
+class DBM
+{
+public:
+	ZT_PACKED_STRUCT(struct Value
+	{
+		Value(const uint64_t t,const uint16_t l,const void *d) :
+			ts(t),
+			l(l)
+		{
+			memcpy(data,d,l);
+		}
+		uint64_t ts;
+		uint16_t len;
+		uint8_t data[ZT_DBM_MAX_VALUE_SIZE];
+	});
+
+private:
+	ZT_PACKED_STRUCT(struct _MapKey
+	{
+		_MapKey() : obj(0),type(0) {}
+		_MapKey(const uint16_t t,const uint64_t o) : obj(o),type(t) {}
+		uint64_t obj;
+		uint16_t type;
+		inline bool operator==(const _MapKey &k) const { return ((obj == k.obj)&&(type == k.type)); }
+	});
+	struct _MapHasher
+	{
+		inline std::size_t operator()(const _MapKey &k) const { return (std::size_t)((k.obj ^ (k.obj >> 32)) + (uint64_t)k.type); }
+	};
+
+	void onUpdate(uint64_t from,const _MapKey &k,const Value &v,uint64_t rev);
+	void onDelete(uint64_t from,const _MapKey &k);
+
+	class _vsdm_watcher
+	{
+	public:
+		_vsdm_watcher(DBM *p) : _parent(p) {}
+		inline void add(uint64_t from,const _MapKey &k,const Value &v,uint64_t rev) { _parent->onUpdate(from,k,v,rev); }
+		inline void update(uint64_t from,const _MapKey &k,const Value &v,uint64_t rev) { _parent->onUpdate(from,k,v,rev); }
+		inline void del(uint64_t from,const _MapKey &k) { _parent->onDelete(from,k); }
+	private:
+		DBM *_parent;
+	};
+	class _vsdm_serializer
+	{
+	public:
+		static inline unsigned long objectSize(const _MapKey &k) { return 10; }
+		static inline unsigned long objectSize(const Value &v) { return (10 + v.len); }
+		static inline const char *objectData(const _MapKey &k) { return reinterpret_cast<const char *>(&k); }
+		static inline const char *objectData(const Value &v) { return reinterpret_cast<const char *>(&v); }
+		static inline bool objectDeserialize(const char *d,unsigned long l,_MapKey &k)
+		{
+			if (l == 10) {
+				memcpy(&k,d,10);
+				return true;
+			}
+			return false;
+		}
+		static inline bool objectDeserialize(const char *d,unsigned long l,Value &v)
+		{
+			if ((l >= 10)&&(l <= (10 + ZT_DBM_MAX_VALUE_SIZE))) {
+				memcpy(&v,d,l);
+				return true;
+			}
+			return false;
+		}
+	};
+	class _vsdm_cryptor
+	{
+	public:
+		_vsdm_cryptor(const Identity &secretIdentity);
+		static inline unsigned long overhead() { return 24; }
+		void encrypt(void *d,unsigned long l);
+		bool decrypt(void *d,unsigned long l);
+		uint8_t _key[32];
+	};
+
+	typedef vsdm< _MapKey,Value,16384,_vsdm_watcher,_vsdm_serializer,_vsdm_cryptor,_MapHasher > _Map;
+
+	friend class _Map;
+
+public:
+	ZT_PACKED_STRUCT(struct ClusterPeerStatus
+	{
+		uint64_t startTime;
+		uint64_t currentTime;
+		uint64_t clusterPeersConnected;
+		uint64_t ztPeersConnected;
+		uint16_t platform;
+		uint16_t arch;
+	});
+
+	DBM(const Identity &secretIdentity,uint64_t clusterMemberId,const std::string &basePath,Node *node);
+
+	~DBM();
+
+	void put(const ZT_StoredObjectType type,const uint64_t key,const void *data,unsigned int len);
+
+	bool get(const ZT_StoredObjectType type,const uint64_t key,Value &value);
+
+	void del(const ZT_StoredObjectType type,const uint64_t key);
+
+	void clean();
+
+private:
+	bool DBM::_persistentPath(const ZT_StoredObjectType type,const uint64_t key,char *p,unsigned int maxlen);
+
+	const std::string _basePath;
+	Node *const _node;
+	uint64_t _startTime;
+	_Map _m;
+};
+
+} // namespace ZeroTier
+
+#endif