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https://github.com/zerotier/ZeroTierOne.git
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Separate out JSON store from controller code.
This commit is contained in:
Adam Ierymenko
parent
8ffae313fd
commit
3c00cd0f88
146
controller/JSONDB.cpp
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146
controller/JSONDB.cpp
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@ -0,0 +1,146 @@
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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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#include "JSONDB.hpp"
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namespace ZeroTier {
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static const nlohmann::json _EMPTY_JSON({{}});
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bool JSONDB::put(const std::string &n,const nlohmann::json &obj)
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{
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if (!_isValidObjectName(n))
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return false;
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std::string path(_genPath(n,false));
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if (!path.length())
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return false;
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std::string buf(obj.dump(2));
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if (!OSUtils::writeFile(path.c_str(),buf))
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return false;
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_E &e = _db[n];
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e.lastModifiedOnDisk = OSUtils::getLastModified(path.c_str());
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e.lastCheck = OSUtils::now();
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e.obj = obj;
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return true;
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}
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const nlohmann::json &JSONDB::get(const std::string &n,unsigned long maxSinceCheck)
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{
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if (!_isValidObjectName(n))
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return _EMPTY_JSON;
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const uint64_t now = OSUtils::now();
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std::string buf;
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std::map<std::string,_E>::iterator e(_db.find(n));
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if (e != _db.end()) {
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if ((now - e->second.lastCheck) <= (uint64_t)maxSinceCheck)
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return e->second.obj;
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std::string path(_genPath(n,false));
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if (!path.length()) // sanity check
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return _EMPTY_JSON;
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// We are somewhat tolerant to momentary disk failures here. This may
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// occur over e.g. EC2's elastic filesystem (NFS).
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const uint64_t lm = OSUtils::getLastModified(path.c_str());
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if ((lm)&&(e->second.lastModifiedOnDisk != lm)) {
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if (OSUtils::readFile(path.c_str(),buf)) {
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try {
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e->second.lastModifiedOnDisk = lm;
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e->second.lastCheck = now;
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e->second.obj = nlohmann::json::parse(buf);
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} catch ( ... ) {
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e->second.obj = _EMPTY_JSON;
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}
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}
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}
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return e->second.obj;
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} else {
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std::string path(_genPath(n,false));
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if (!path.length())
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return _EMPTY_JSON;
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if (!OSUtils::readFile(path.c_str(),buf))
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return _EMPTY_JSON;
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const uint64_t lm = OSUtils::getLastModified(path.c_str());
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if (!lm)
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return _EMPTY_JSON;
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_E &e2 = _db[n];
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e2.lastModifiedOnDisk = lm;
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e2.lastCheck = now;
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try {
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e2.obj = nlohmann::json::parse(buf);
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} catch ( ... ) {
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e2.obj = _EMPTY_JSON;
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}
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return e2.obj;
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}
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}
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bool JSONDB::_isValidObjectName(const std::string &n)
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{
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if (n.length() == 0)
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return false;
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const char *p = n.c_str();
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char c;
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// For security reasons we should not allow dots, backslashes, or other path characters or potential path characters.
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while ((c = *(p++))) {
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if (!( ((c >= 'a')&&(c <= 'z')) || ((c >= 'A')&&(c <= 'Z')) || ((c >= '0')&&(c <= '9')) || (c == '/') || (c == '_') || (c == '~') || (c == '-') ))
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return false;
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}
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return true;
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}
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std::string JSONDB::_genPath(const std::string &n,bool create)
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{
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std::vector<std::string> pt(Utils::split(n.c_str(),"/","",""));
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if (pt.size() == 0)
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return std::string();
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if (pt.size() == 1)
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return pt[0];
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std::string p(_basePath);
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if (create) OSUtils::mkdir(p.c_str());
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for(unsigned long i=0,j=pt.size()-1;i<j;++i) {
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p.push_back(ZT_PATH_SEPARATOR);
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p.append(pt[i]);
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if (create) OSUtils::mkdir(p.c_str());
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}
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p.push_back(ZT_PATH_SEPARATOR);
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p.append(pt[pt.size()-1]);
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p.append(".json");
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return p;
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}
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void JSONDB::_reloadAll(const std::string &path)
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{
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}
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} // namespace ZeroTier
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88
controller/JSONDB.hpp
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88
controller/JSONDB.hpp
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@ -0,0 +1,88 @@
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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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#ifndef ZT_JSONDB_HPP
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#define ZT_JSONDB_HPP
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#include <string>
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#include <map>
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#include <stdexcept>
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#include <vector>
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#include <algorithm>
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#include "../node/Constants.hpp"
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#include "../node/Utils.hpp"
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#include "../ext/json/json.hpp"
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#include "../osdep/OSUtils.hpp"
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namespace ZeroTier {
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/**
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* Hierarchical JSON store that persists into the filesystem
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*/
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class JSONDB
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{
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public:
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JSONDB(const std::string &basePath) :
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_basePath(basePath)
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{
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this->_reloadAll(_basePath);
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}
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bool put(const std::string &n,const nlohmann::json &obj);
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inline bool put(const std::string &n1,const std::string &n2,const nlohmann::json &obj) { return this->put((n1 + "/" + n2),obj); }
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inline bool put(const std::string &n1,const std::string &n2,const std::string &n3,const nlohmann::json &obj) { return this->put((n1 + "/" + n2 + "/" + n3),obj); }
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const nlohmann::json &get(const std::string &n,unsigned long maxSinceCheck = 0);
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inline const nlohmann::json &get(const std::string &n1,const std::string &n2,unsigned long maxSinceCheck = 0) { return this->get((n1 + "/" + n2),maxSinceCheck); }
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inline const nlohmann::json &get(const std::string &n1,const std::string &n2,const std::string &n3,unsigned long maxSinceCheck = 0) { return this->get((n1 + "/" + n2 + "/" + n3),maxSinceCheck); }
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inline const nlohmann::json &get(const std::string &n1,const std::string &n2,const std::string &n3,const std::string &n4,unsigned long maxSinceCheck = 0) { return this->get((n1 + "/" + n2 + "/" + n3 + "/" + n4),maxSinceCheck); }
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inline const nlohmann::json &get(const std::string &n1,const std::string &n2,const std::string &n3,const std::string &n4,const std::string &n5,unsigned long maxSinceCheck = 0) { return this->get((n1 + "/" + n2 + "/" + n3 + "/" + n4 + "/" + n5),maxSinceCheck); }
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template<typename F>
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inline void each(F func,unsigned long maxSinceCheck = 0)
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{
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const uint64_t now = OSUtils::now();
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for(std::map<std::string,_E>::const_iterator i(_db.begin());i!=_db.end();++i) {
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if ((now - i->second.lastCheck) > (uint64_t)maxSinceCheck)
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this->get(i->first);
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func(i->first,i->second.obj);
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}
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}
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private:
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bool _isValidObjectName(const std::string &n);
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std::string _genPath(const std::string &n,bool create);
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void _reloadAll(const std::string &path);
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struct _E
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{
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uint64_t lastModifiedOnDisk;
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uint64_t lastCheck;
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nlohmann::json obj;
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};
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std::string _basePath;
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std::map<std::string,_E> _db;
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};
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} // namespace ZeroTier
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#endif
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@ -1,5 +1,6 @@
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OBJS=\
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controller/EmbeddedNetworkController.o \
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controller/JSONDB.o \
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node/C25519.o \
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node/Capability.o \
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node/CertificateOfMembership.o \
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