ZeroTierOne/controller/DBMirrorSet.cpp
2019-08-14 10:35:57 -07:00

245 lines
6.7 KiB
C++

/*
* 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.
*/
#include "DBMirrorSet.hpp"
namespace ZeroTier {
DBMirrorSet::DBMirrorSet(DB::ChangeListener *listener) :
_listener(listener),
_running(true)
{
_syncCheckerThread = std::thread([this]() {
for(;;) {
for(int i=0;i<120;++i) { // 1 minute delay between checks
if (!_running)
return;
std::this_thread::sleep_for(std::chrono::milliseconds(500));
}
std::vector< std::shared_ptr<DB> > dbs;
{
std::lock_guard<std::mutex> l(_dbs_l);
if (_dbs.size() <= 1)
continue; // no need to do this if there's only one DB, so skip the iteration
dbs = _dbs;
}
for(auto db=dbs.begin();db!=dbs.end();++db) {
(*db)->each([&dbs,&db](uint64_t networkId,const nlohmann::json &network,uint64_t memberId,const nlohmann::json &member) {
try {
if (network.is_object()) {
if (memberId == 0) {
for(auto db2=dbs.begin();db2!=dbs.end();++db2) {
if (db->get() != db2->get()) {
nlohmann::json nw2;
if ((!(*db2)->get(networkId,nw2))||((nw2.is_object())&&(OSUtils::jsonInt(nw2["revision"],0) < OSUtils::jsonInt(network["revision"],0)))) {
nw2 = network;
(*db2)->save(nw2,false);
}
}
}
} else if (member.is_object()) {
for(auto db2=dbs.begin();db2!=dbs.end();++db2) {
if (db->get() != db2->get()) {
nlohmann::json nw2,m2;
if ((!(*db2)->get(networkId,nw2,memberId,m2))||((m2.is_object())&&(OSUtils::jsonInt(m2["revision"],0) < OSUtils::jsonInt(member["revision"],0)))) {
m2 = member;
(*db2)->save(m2,false);
}
}
}
}
}
} catch ( ... ) {} // skip entries that generate JSON errors
});
}
}
});
}
DBMirrorSet::~DBMirrorSet()
{
_running = false;
_syncCheckerThread.join();
}
bool DBMirrorSet::hasNetwork(const uint64_t networkId) const
{
std::lock_guard<std::mutex> l(_dbs_l);
for(auto d=_dbs.begin();d!=_dbs.end();++d) {
if ((*d)->hasNetwork(networkId))
return true;
}
return false;
}
bool DBMirrorSet::get(const uint64_t networkId,nlohmann::json &network)
{
std::lock_guard<std::mutex> l(_dbs_l);
for(auto d=_dbs.begin();d!=_dbs.end();++d) {
if ((*d)->get(networkId,network)) {
return true;
}
}
return false;
}
bool DBMirrorSet::get(const uint64_t networkId,nlohmann::json &network,const uint64_t memberId,nlohmann::json &member)
{
std::lock_guard<std::mutex> l(_dbs_l);
for(auto d=_dbs.begin();d!=_dbs.end();++d) {
if ((*d)->get(networkId,network,memberId,member))
return true;
}
return false;
}
bool DBMirrorSet::get(const uint64_t networkId,nlohmann::json &network,const uint64_t memberId,nlohmann::json &member,DB::NetworkSummaryInfo &info)
{
std::lock_guard<std::mutex> l(_dbs_l);
for(auto d=_dbs.begin();d!=_dbs.end();++d) {
if ((*d)->get(networkId,network,memberId,member,info))
return true;
}
return false;
}
bool DBMirrorSet::get(const uint64_t networkId,nlohmann::json &network,std::vector<nlohmann::json> &members)
{
std::lock_guard<std::mutex> l(_dbs_l);
for(auto d=_dbs.begin();d!=_dbs.end();++d) {
if ((*d)->get(networkId,network,members))
return true;
}
return false;
}
void DBMirrorSet::networks(std::set<uint64_t> &networks)
{
std::lock_guard<std::mutex> l(_dbs_l);
for(auto d=_dbs.begin();d!=_dbs.end();++d) {
(*d)->networks(networks);
}
}
bool DBMirrorSet::waitForReady()
{
bool r = false;
std::lock_guard<std::mutex> l(_dbs_l);
for(auto d=_dbs.begin();d!=_dbs.end();++d) {
r |= (*d)->waitForReady();
}
return r;
}
bool DBMirrorSet::isReady()
{
std::lock_guard<std::mutex> l(_dbs_l);
for(auto d=_dbs.begin();d!=_dbs.end();++d) {
if (!(*d)->isReady())
return false;
}
return true;
}
bool DBMirrorSet::save(nlohmann::json &record,bool notifyListeners)
{
std::vector< std::shared_ptr<DB> > dbs;
{
std::lock_guard<std::mutex> l(_dbs_l);
dbs = _dbs;
}
if (notifyListeners) {
for(auto d=dbs.begin();d!=dbs.end();++d) {
if ((*d)->save(record,true))
return true;
}
return false;
} else {
bool modified = false;
for(auto d=dbs.begin();d!=dbs.end();++d) {
modified |= (*d)->save(record,false);
}
return modified;
}
}
void DBMirrorSet::eraseNetwork(const uint64_t networkId)
{
std::lock_guard<std::mutex> l(_dbs_l);
for(auto d=_dbs.begin();d!=_dbs.end();++d) {
(*d)->eraseNetwork(networkId);
}
}
void DBMirrorSet::eraseMember(const uint64_t networkId,const uint64_t memberId)
{
std::lock_guard<std::mutex> l(_dbs_l);
for(auto d=_dbs.begin();d!=_dbs.end();++d) {
(*d)->eraseMember(networkId,memberId);
}
}
void DBMirrorSet::nodeIsOnline(const uint64_t networkId,const uint64_t memberId,const InetAddress &physicalAddress)
{
std::lock_guard<std::mutex> l(_dbs_l);
for(auto d=_dbs.begin();d!=_dbs.end();++d) {
(*d)->nodeIsOnline(networkId,memberId,physicalAddress);
}
}
void DBMirrorSet::onNetworkUpdate(const void *db,uint64_t networkId,const nlohmann::json &network)
{
nlohmann::json record(network);
std::lock_guard<std::mutex> l(_dbs_l);
for(auto d=_dbs.begin();d!=_dbs.end();++d) {
if (d->get() != db) {
(*d)->save(record,false);
}
}
_listener->onNetworkUpdate(this,networkId,network);
}
void DBMirrorSet::onNetworkMemberUpdate(const void *db,uint64_t networkId,uint64_t memberId,const nlohmann::json &member)
{
nlohmann::json record(member);
std::lock_guard<std::mutex> l(_dbs_l);
for(auto d=_dbs.begin();d!=_dbs.end();++d) {
if (d->get() != db) {
(*d)->save(record,false);
}
}
_listener->onNetworkMemberUpdate(this,networkId,memberId,member);
}
void DBMirrorSet::onNetworkMemberDeauthorize(const void *db,uint64_t networkId,uint64_t memberId)
{
_listener->onNetworkMemberDeauthorize(this,networkId,memberId);
}
} // namespace ZeroTier