A bunch more refactoring to rip out obsolete stuff related to old root system and general cleanup.

attic/MulticastSubscriptions.hpp

@@ -0,0 +1,123 @@
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2019  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_MULTICASTSUBSCRIPTIONS_HPP
+#define ZT_MULTICASTSUBSCRIPTIONS_HPP
+
+#include "Constants.hpp"
+#include "MulticastGroup.hpp"
+#include "Identity.hpp"
+#include "Buffer.hpp"
+
+namespace ZeroTier {
+
+/**
+ * A compact collection of multicast subscriptions identified by 32-bit hash values
+ */
+class MulticastSubscriptions
+{
+public:
+	inline MulticastSubscriptions() : _signatureLength(0) {}
+
+	inline void add(const MulticastGroup &mg)
+	{
+		if (_subscriptions.size() < ZT_MAX_MULTICAST_SUBSCRIPTIONS)
+			_subscriptions.push_back(mg.id32());
+	}
+
+	inline bool sign(const Identity &signer,const int64_t ts)
+	{
+		_ts = ts;
+		std::sort(_subscriptions.begin(),_subscriptions.end());
+		_subscriptions.erase(std::unique(_subscriptions.begin(),_subscriptions.end()),_subscriptions.end());
+
+		_SRec tmp;
+		tmp.ts = Utils::hton((uint64_t)ts);
+		for(unsigned long i=0,j=(unsigned long)_subscriptions.size();i<j;++i)
+			tmp.g[i] = Utils::hton(_subscriptions[i]);
+
+		_signatureLength = signer.sign(&tmp,(unsigned int)((_subscriptions.size() * sizeof(uint32_t)) + sizeof(uint64_t)),_signature,sizeof(_signature));
+		return (_signatureLength > 0);
+	}
+
+	inline bool verify(const Identity &signer)
+	{
+		if ((_signatureLength == 0)||(_signatureLength > ZT_SIGNATURE_BUFFER_SIZE))
+			return false;
+		_SRec tmp;
+		tmp.ts = Utils::hton((uint64_t)_ts);
+		for(unsigned long i=0,j=(unsigned long)_subscriptions.size();i<j;++i)
+			tmp.g[i] = Utils::hton(_subscriptions[i]);
+		return signer.verify(&tmp,(unsigned int)((_subscriptions.size() * sizeof(uint32_t)) + sizeof(uint64_t)),_signature,_signatureLength);
+	}
+
+	inline int64_t timestamp() const { return _ts; }
+	inline unsigned int count() const { return (unsigned int)_subscriptions.size(); }
+	inline bool contains(const MulticastGroup &mg) const { return std::binary_search(_subscriptions.begin(),_subscriptions.end(),mg.id32()); }
+
+	template<unsigned int C>
+	inline void serialize(Buffer<C> &b) const
+	{
+		b.append((uint64_t)_ts);
+		b.append((uint16_t)_subscriptions.size());
+		for(std::vector<uint32_t>::const_iterator i(_subscriptions.begin());i!=_subscriptions.end();++i)
+			b.append(*i);
+		b.append((uint16_t)_signatureLength);
+		b.append(_signature,_signatureLength);
+	}
+
+	template<unsigned int C>
+	inline unsigned int deserialize(const Buffer<C> &b,unsigned int startAt = 0)
+	{
+		unsigned int p = startAt;
+		_ts = (int64_t)(b.template at<uint64_t>(p)); p += 8;
+		_subscriptions.resize(b.template at<uint16_t>(p)); p += 2;
+		for(std::vector<uint32_t>::iterator i(_subscriptions.begin());i!=_subscriptions.end();++i) {
+			*i = b.template at<uint32_t>(p);
+			p += 4;
+		}
+		_signatureLength = b.template at<uint16_t>(p); p += 2;
+		if (_signatureLength > ZT_SIGNATURE_BUFFER_SIZE)
+			throw ZT_EXCEPTION_INVALID_SERIALIZED_DATA_OVERFLOW;
+		memcpy(_signature,b.field(p,_signatureLength),_signatureLength); p += _signatureLength;
+		return (p - startAt);
+	}
+
+private:
+	ZT_PACKED_STRUCT(struct _SRec {
+		uint64_t ts;
+		uint32_t g[ZT_MAX_MULTICAST_SUBSCRIPTIONS];
+	});
+
+	int64_t _ts;
+	std::vector<uint32_t> _subscriptions;
+	unsigned int _signatureLength;
+	uint8_t _signature[ZT_SIGNATURE_BUFFER_SIZE];
+};
+
+} // namespace ZeroTier
+
+#endif