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/*
* 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_CONTROLLER_DB_HPP
#define ZT_CONTROLLER_DB_HPP
//#define ZT_CONTROLLER_USE_LIBPQ
#include "../node/Constants.hpp"
#include "../node/Identity.hpp"
#include "../node/InetAddress.hpp"
#include "../osdep/OSUtils.hpp"
#include "../osdep/BlockingQueue.hpp"
#include <memory>
#include <string>
#include <thread>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <atomic>
#include <mutex>
#include <set>
#include "../ext/json/json.hpp"
namespace ZeroTier
{
/**
* Base class with common infrastructure for all controller DB implementations
*/
class DB
{
public:
class ChangeListener
{
public:
ChangeListener() {}
virtual ~ChangeListener() {}
virtual void onNetworkUpdate(const void *db,uint64_t networkId,const nlohmann::json &network) {}
virtual void onNetworkMemberUpdate(const void *db,uint64_t networkId,uint64_t memberId,const nlohmann::json &member) {}
virtual void onNetworkMemberDeauthorize(const void *db,uint64_t networkId,uint64_t memberId) {}
};
struct NetworkSummaryInfo
{
NetworkSummaryInfo() : authorizedMemberCount(0),totalMemberCount(0),mostRecentDeauthTime(0) {}
std::vector<Address> activeBridges;
std::vector<InetAddress> allocatedIps;
unsigned long authorizedMemberCount;
unsigned long totalMemberCount;
int64_t mostRecentDeauthTime;
};
static void initNetwork(nlohmann::json &network);
static void initMember(nlohmann::json &member);
static void cleanNetwork(nlohmann::json &network);
static void cleanMember(nlohmann::json &member);
DB();
virtual ~DB();
virtual bool waitForReady() = 0;
virtual bool isReady() = 0;
inline bool hasNetwork(const uint64_t networkId) const
{
std::lock_guard<std::mutex> l(_networks_l);
return (_networks.find(networkId) != _networks.end());
}
bool get(const uint64_t networkId,nlohmann::json &network);
bool get(const uint64_t networkId,nlohmann::json &network,const uint64_t memberId,nlohmann::json &member);
bool get(const uint64_t networkId,nlohmann::json &network,const uint64_t memberId,nlohmann::json &member,NetworkSummaryInfo &info);
bool get(const uint64_t networkId,nlohmann::json &network,std::vector<nlohmann::json> &members);
void networks(std::set<uint64_t> &networks);
template<typename F>
inline void each(F f)
{
nlohmann::json nullJson;
std::lock_guard<std::mutex> lck(_networks_l);
for(auto nw=_networks.begin();nw!=_networks.end();++nw) {
f(nw->first,nw->second->config,0,nullJson); // first provide network with 0 for member ID
for(auto m=nw->second->members.begin();m!=nw->second->members.end();++m) {
f(nw->first,nw->second->config,m->first,m->second);
}
}
}
virtual bool save(nlohmann::json &record,bool notifyListeners) = 0;
virtual void eraseNetwork(const uint64_t networkId) = 0;
virtual void eraseMember(const uint64_t networkId,const uint64_t memberId) = 0;
virtual void nodeIsOnline(const uint64_t networkId,const uint64_t memberId,const InetAddress &physicalAddress) = 0;
inline void addListener(DB::ChangeListener *const listener)
{
std::lock_guard<std::mutex> l(_changeListeners_l);
_changeListeners.push_back(listener);
}
protected:
static inline bool _compareRecords(const nlohmann::json &a,const nlohmann::json &b)
{
if (a.is_object() == b.is_object()) {
if (a.is_object()) {
if (a.size() != b.size())
return false;
auto amap = a.get<nlohmann::json::object_t>();
auto bmap = b.get<nlohmann::json::object_t>();
for(auto ai=amap.begin();ai!=amap.end();++ai) {
if (ai->first != "revision") { // ignore revision, compare only non-revision-counter fields
auto bi = bmap.find(ai->first);
if ((bi == bmap.end())||(bi->second != ai->second))
return false;
}
}
return true;
}
return (a == b);
}
return false;
}
struct _Network
{
_Network() : mostRecentDeauthTime(0) {}
nlohmann::json config;
std::unordered_map<uint64_t,nlohmann::json> members;
std::unordered_set<uint64_t> activeBridgeMembers;
std::unordered_set<uint64_t> authorizedMembers;
std::unordered_set<InetAddress,InetAddress::Hasher> allocatedIps;
int64_t mostRecentDeauthTime;
std::mutex lock;
};
void _memberChanged(nlohmann::json &old,nlohmann::json &memberConfig,bool notifyListeners);
void _networkChanged(nlohmann::json &old,nlohmann::json &networkConfig,bool notifyListeners);
void _fillSummaryInfo(const std::shared_ptr<_Network> &nw,NetworkSummaryInfo &info);
std::vector<DB::ChangeListener *> _changeListeners;
std::unordered_map< uint64_t,std::shared_ptr<_Network> > _networks;
std::unordered_multimap< uint64_t,uint64_t > _networkByMember;
mutable std::mutex _changeListeners_l;
mutable std::mutex _networks_l;
};
} // namespace ZeroTier
#endif
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