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ZeroTierOne/controller/FileDB.cpp

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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.
*/
#include "FileDB.hpp"
namespace ZeroTier
{
FileDB::FileDB(EmbeddedNetworkController *const nc,const Identity &myId,const char *path) :
DB(nc,myId,path),
_networksPath(_path + ZT_PATH_SEPARATOR_S + "network"),
_tracePath(_path + ZT_PATH_SEPARATOR_S + "trace"),
_onlineChanged(false),
_running(true)
{
OSUtils::mkdir(_path.c_str());
OSUtils::lockDownFile(_path.c_str(),true);
OSUtils::mkdir(_networksPath.c_str());
OSUtils::mkdir(_tracePath.c_str());
std::vector<std::string> networks(OSUtils::listDirectory(_networksPath.c_str(),false));
std::string buf;
for(auto n=networks.begin();n!=networks.end();++n) {
buf.clear();
if ((n->length() == 21)&&(OSUtils::readFile((_networksPath + ZT_PATH_SEPARATOR_S + *n).c_str(),buf))) {
try {
nlohmann::json network(OSUtils::jsonParse(buf));
const std::string nwids = network["id"];
if (nwids.length() == 16) {
nlohmann::json nullJson;
_networkChanged(nullJson,network,false);
std::string membersPath(_networksPath + ZT_PATH_SEPARATOR_S + nwids + ZT_PATH_SEPARATOR_S "member");
std::vector<std::string> members(OSUtils::listDirectory(membersPath.c_str(),false));
for(auto m=members.begin();m!=members.end();++m) {
buf.clear();
if ((m->length() == 15)&&(OSUtils::readFile((membersPath + ZT_PATH_SEPARATOR_S + *m).c_str(),buf))) {
try {
nlohmann::json member(OSUtils::jsonParse(buf));
const std::string addrs = member["id"];
if (addrs.length() == 10) {
nlohmann::json nullJson2;
_memberChanged(nullJson2,member,false);
}
} catch ( ... ) {}
}
}
}
} catch ( ... ) {}
}
}
_onlineUpdateThread = std::thread([this]() {
unsigned int cnt = 0;
while (this->_running) {
std::this_thread::sleep_for(std::chrono::microseconds(100));
if ((++cnt % 20) == 0) { // 5 seconds
std::lock_guard<std::mutex> l(this->_online_l);
if (!this->_running) return;
if (this->_onlineChanged) {
char p[4096],atmp[64];
for(auto nw=this->_online.begin();nw!=this->_online.end();++nw) {
OSUtils::ztsnprintf(p,sizeof(p),"%s" ZT_PATH_SEPARATOR_S "%.16llx-online.json",_networksPath.c_str(),(unsigned long long)nw->first);
FILE *f = fopen(p,"wb");
if (f) {
fprintf(f,"{");
const char *memberPrefix = "";
for(auto m=nw->second.begin();m!=nw->second.end();++m) {
fprintf(f,"%s\"%.10llx\":{" ZT_EOL_S,memberPrefix,(unsigned long long)m->first);
memberPrefix = ",";
InetAddress lastAddr;
const char *timestampPrefix = " ";
int cnt = 0;
for(auto ts=m->second.rbegin();ts!=m->second.rend();) {
if (cnt < 25) {
if (lastAddr != ts->second) {
lastAddr = ts->second;
fprintf(f,"%s\"%lld\":\"%s\"" ZT_EOL_S,timestampPrefix,(long long)ts->first,ts->second.toString(atmp));
timestampPrefix = ",";
++cnt;
++ts;
} else {
ts = std::map<int64_t,InetAddress>::reverse_iterator(m->second.erase(std::next(ts).base()));
}
} else {
ts = std::map<int64_t,InetAddress>::reverse_iterator(m->second.erase(std::next(ts).base()));
}
}
fprintf(f,"}");
}
fprintf(f,"}" ZT_EOL_S);
fclose(f);
}
}
this->_onlineChanged = false;
}
}
}
});
}
FileDB::~FileDB()
{
try {
_online_l.lock();
_running = false;
_online_l.unlock();
_onlineUpdateThread.join();
} catch ( ... ) {}
}
bool FileDB::waitForReady() { return true; }
bool FileDB::isReady() { return true; }
void FileDB::save(nlohmann::json *orig,nlohmann::json &record)
{
char p1[4096],p2[4096],pb[4096];
try {
if (orig) {
if (*orig != record) {
record["revision"] = OSUtils::jsonInt(record["revision"],0ULL) + 1;
}
} else {
record["revision"] = 1;
}
const std::string objtype = record["objtype"];
if (objtype == "network") {
const uint64_t nwid = OSUtils::jsonIntHex(record["id"],0ULL);
if (nwid) {
nlohmann::json old;
get(nwid,old);
if ((!old.is_object())||(old != record)) {
OSUtils::ztsnprintf(p1,sizeof(p1),"%s" ZT_PATH_SEPARATOR_S "%.16llx.json",_networksPath.c_str(),nwid);
if (!OSUtils::writeFile(p1,OSUtils::jsonDump(record,-1)))
fprintf(stderr,"WARNING: controller unable to write to path: %s" ZT_EOL_S,p1);
_networkChanged(old,record,true);
}
}
} else if (objtype == "member") {
const uint64_t id = OSUtils::jsonIntHex(record["id"],0ULL);
const uint64_t nwid = OSUtils::jsonIntHex(record["nwid"],0ULL);
if ((id)&&(nwid)) {
nlohmann::json network,old;
get(nwid,network,id,old);
if ((!old.is_object())||(old != record)) {
OSUtils::ztsnprintf(pb,sizeof(pb),"%s" ZT_PATH_SEPARATOR_S "%.16llx" ZT_PATH_SEPARATOR_S "member",_networksPath.c_str(),(unsigned long long)nwid);
OSUtils::ztsnprintf(p1,sizeof(p1),"%s" ZT_PATH_SEPARATOR_S "%.10llx.json",pb,(unsigned long long)id);
if (!OSUtils::writeFile(p1,OSUtils::jsonDump(record,-1))) {
OSUtils::ztsnprintf(p2,sizeof(p2),"%s" ZT_PATH_SEPARATOR_S "%.16llx",_networksPath.c_str(),(unsigned long long)nwid);
OSUtils::mkdir(p2);
OSUtils::mkdir(pb);
if (!OSUtils::writeFile(p1,OSUtils::jsonDump(record,-1)))
fprintf(stderr,"WARNING: controller unable to write to path: %s" ZT_EOL_S,p1);
}
_memberChanged(old,record,true);
}
}
} else if (objtype == "trace") {
const std::string id = record["id"];
if (id.length() > 0) {
OSUtils::ztsnprintf(p1,sizeof(p1),"%s" ZT_PATH_SEPARATOR_S "%s.json",_tracePath.c_str(),id.c_str());
OSUtils::writeFile(p1,OSUtils::jsonDump(record,-1));
}
}
} catch ( ... ) {} // drop invalid records missing fields
}
void FileDB::eraseNetwork(const uint64_t networkId)
{
nlohmann::json network,nullJson;
get(networkId,network);
char p[16384];
OSUtils::ztsnprintf(p,sizeof(p),"%s" ZT_PATH_SEPARATOR_S "%.16llx.json",_networksPath.c_str(),networkId);
OSUtils::rm(p);
OSUtils::ztsnprintf(p,sizeof(p),"%s" ZT_PATH_SEPARATOR_S "%.16llx-online.json",_networksPath.c_str(),networkId);
OSUtils::rm(p);
OSUtils::ztsnprintf(p,sizeof(p),"%s" ZT_PATH_SEPARATOR_S "%.16llx" ZT_PATH_SEPARATOR_S "member",_networksPath.c_str(),(unsigned long long)networkId);
OSUtils::rmDashRf(p);
_networkChanged(network,nullJson,true);
std::lock_guard<std::mutex> l(this->_online_l);
this->_online.erase(networkId);
this->_onlineChanged = true;
}
void FileDB::eraseMember(const uint64_t networkId,const uint64_t memberId)
{
nlohmann::json network,member,nullJson;
get(networkId,network);
get(memberId,member);
char p[4096];
OSUtils::ztsnprintf(p,sizeof(p),"%s" ZT_PATH_SEPARATOR_S "%.16llx" ZT_PATH_SEPARATOR_S "member" ZT_PATH_SEPARATOR_S "%.10llx.json",_networksPath.c_str(),networkId,memberId);
OSUtils::rm(p);
_memberChanged(member,nullJson,true);
std::lock_guard<std::mutex> l(this->_online_l);
this->_online[networkId].erase(memberId);
this->_onlineChanged = true;
}
void FileDB::nodeIsOnline(const uint64_t networkId,const uint64_t memberId,const InetAddress &physicalAddress)
{
char mid[32],atmp[64];
OSUtils::ztsnprintf(mid,sizeof(mid),"%.10llx",(unsigned long long)memberId);
physicalAddress.toString(atmp);
std::lock_guard<std::mutex> l(this->_online_l);
this->_online[networkId][memberId][OSUtils::now()] = physicalAddress;
this->_onlineChanged = true;
}
} // namespace ZeroTier
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