Grant Limberg
11 years ago
32 changed files with 903 additions and 499 deletions
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/*
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* ZeroTier One - Network Virtualization Everywhere |
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* Copyright (C) 2011-2015 ZeroTier, Inc. |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* |
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* -- |
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* |
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* ZeroTier may be used and distributed under the terms of the GPLv3, which |
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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* |
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* If you would like to embed ZeroTier into a commercial application or |
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* redistribute it in a modified binary form, please contact ZeroTier Networks |
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* LLC. Start here: http://www.zerotier.com/
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*/ |
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#ifndef ZT_CMWC4096_HPP |
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#define ZT_CMWC4096_HPP |
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#include <stdint.h> |
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#include "Utils.hpp" |
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namespace ZeroTier { |
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/**
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* Complement Multiply With Carry random number generator |
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* |
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* Based on original code posted to Usenet in the public domain by |
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* George Marsaglia. Period is approximately 2^131086. |
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* |
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* This is not used for cryptographic purposes but for a very fast |
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* and high-quality PRNG elsewhere in the code. |
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*/ |
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class CMWC4096 |
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{ |
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public: |
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/**
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* Construct and initialize from secure random source |
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*/ |
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CMWC4096() |
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throw() |
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{ |
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Utils::getSecureRandom(Q,sizeof(Q)); |
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Utils::getSecureRandom(&c,sizeof(c)); |
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c %= 809430660; |
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i = 4095; |
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} |
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inline uint32_t next32() |
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throw() |
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{ |
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uint32_t __i = ++i & 4095; |
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const uint64_t t = (18782ULL * (uint64_t)Q[__i]) + (uint64_t)c; |
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c = (uint32_t)(t >> 32); |
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uint32_t x = c + (uint32_t)t; |
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const uint32_t p = (uint32_t)(x < c); x += p; c += p; |
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return (Q[__i] = 0xfffffffe - x); |
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} |
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inline uint64_t next64() |
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throw() |
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{ |
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return ((((uint64_t)next32()) << 32) ^ (uint64_t)next32()); |
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} |
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inline double nextDouble() |
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throw() |
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{ |
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return ((double)(next32()) / 4294967296.0); |
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} |
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private: |
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uint32_t Q[4096]; |
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uint32_t c; |
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uint32_t i; |
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}; |
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} // namespace ZeroTier
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#endif |
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@ -0,0 +1,142 @@ |
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/*
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* ZeroTier One - Network Virtualization Everywhere |
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* Copyright (C) 2011-2015 ZeroTier, Inc. |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* |
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* -- |
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* |
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* ZeroTier may be used and distributed under the terms of the GPLv3, which |
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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* |
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* If you would like to embed ZeroTier into a commercial application or |
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* redistribute it in a modified binary form, please contact ZeroTier Networks |
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* LLC. Start here: http://www.zerotier.com/
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*/ |
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#ifndef ZT_REMOTEPATH_HPP |
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#define ZT_REMOTEPATH_HPP |
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#include <stdint.h> |
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#include <string.h> |
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#include <stdexcept> |
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#include <algorithm> |
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#include "Path.hpp" |
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#include "Node.hpp" |
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#include "AntiRecursion.hpp" |
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#include "RuntimeEnvironment.hpp" |
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namespace ZeroTier { |
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/**
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* Path to a remote peer |
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* |
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* This extends Path to include status information about path activity. |
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*/ |
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class RemotePath : public Path |
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{ |
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public: |
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RemotePath() : |
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Path(), |
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_lastSend(0), |
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_lastReceived(0), |
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_fixed(false) {} |
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RemotePath(const InetAddress &addr,bool fixed) : |
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Path(addr,0,TRUST_NORMAL,false), |
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_lastSend(0), |
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_lastReceived(0), |
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_fixed(fixed) {} |
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inline uint64_t lastSend() const throw() { return _lastSend; } |
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inline uint64_t lastReceived() const throw() { return _lastReceived; } |
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/**
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* @return Is this a fixed path? |
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*/ |
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inline bool fixed() const throw() { return _fixed; } |
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/**
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* @param f New value of fixed flag |
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*/ |
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inline void setFixed(const bool f) |
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throw() |
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{ |
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_fixed = f; |
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} |
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/**
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* Called when a packet is sent to this remote path |
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* |
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* This is called automatically by RemotePath::send(). |
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* |
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* @param t Time of send |
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*/ |
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inline void sent(uint64_t t) |
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throw() |
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{ |
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_lastSend = t; |
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} |
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/**
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* Called when a packet is received from this remote path |
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* |
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* @param t Time of receive |
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*/ |
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inline void received(uint64_t t) |
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throw() |
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{ |
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_lastReceived = t; |
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} |
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/**
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* @param now Current time |
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* @return True if this path is fixed or has received data in last ACTIVITY_TIMEOUT ms |
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*/ |
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inline bool active(uint64_t now) const |
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throw() |
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{ |
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return ( (_fixed) || ((now - _lastReceived) < ZT_PEER_ACTIVITY_TIMEOUT) ); |
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} |
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/**
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* Send a packet via this path |
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* |
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* @param RR Runtime environment |
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* @param data Packet data |
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* @param len Packet length |
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* @param now Current time |
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* @return True if transport reported success |
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*/ |
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inline bool send(const RuntimeEnvironment *RR,const void *data,unsigned int len,uint64_t now) |
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{ |
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if (RR->node->putPacket(_addr,data,len)) { |
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sent(now); |
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RR->antiRec->logOutgoingZT(data,len); |
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return true; |
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} |
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return false; |
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} |
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private: |
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uint64_t _lastSend; |
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uint64_t _lastReceived; |
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bool _fixed; |
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}; |
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} // namespace ZeroTier
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#endif |
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