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devilutionX-ZeroTierOne/controller/LFDB.cpp

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/*
* Copyright (c)2019 ZeroTier, Inc.
*
* Use of this software is governed by the Business Source License included
* in the LICENSE.TXT file in the project's root directory.
*
* Change Date: 2026-01-01
*
* On the date above, in accordance with the Business Source License, use
* of this software will be governed by version 2.0 of the Apache License.
*/
/****/
#include "LFDB.hpp"
#include "../ext/cpp-httplib/httplib.h"
#include "../osdep/OSUtils.hpp"
#include <chrono>
#include <iostream>
#include <sstream>
#include <thread>
namespace ZeroTier {
LFDB::LFDB(const Identity& myId, const char* path, const char* lfOwnerPrivate, const char* lfOwnerPublic, const char* lfNodeHost, int lfNodePort, bool storeOnlineState)
: DB()
, _myId(myId)
, _lfOwnerPrivate((lfOwnerPrivate) ? lfOwnerPrivate : "")
, _lfOwnerPublic((lfOwnerPublic) ? lfOwnerPublic : "")
, _lfNodeHost((lfNodeHost) ? lfNodeHost : "127.0.0.1")
, _lfNodePort(((lfNodePort > 0) && (lfNodePort < 65536)) ? lfNodePort : 9980)
, _running(true)
, _ready(false)
, _storeOnlineState(storeOnlineState)
{
_syncThread = std::thread([this]() {
char controllerAddress[24];
const uint64_t controllerAddressInt = _myId.address().toInt();
_myId.address().toString(controllerAddress);
std::string networksSelectorName("com.zerotier.controller.lfdb:");
networksSelectorName.append(controllerAddress);
networksSelectorName.append("/network");
// LF record masking key is the first 32 bytes of SHA512(controller private key) in hex,
// hiding record values from anything but the controller or someone who has its key.
uint8_t sha512pk[64];
_myId.sha512PrivateKey(sha512pk);
char maskingKey[128];
Utils::hex(sha512pk, 32, maskingKey);
httplib::Client htcli(_lfNodeHost.c_str(), _lfNodePort);
int64_t timeRangeStart = 0;
while (_running.load()) {
{
std::lock_guard<std::mutex> sl(_state_l);
for (auto ns = _state.begin(); ns != _state.end(); ++ns) {
if (ns->second.dirty) {
nlohmann::json network;
if (get(ns->first, network)) {
nlohmann::json newrec, selector0;
selector0["Name"] = networksSelectorName;
selector0["Ordinal"] = ns->first;
newrec["Selectors"].push_back(selector0);
newrec["Value"] = network.dump();
newrec["OwnerPrivate"] = _lfOwnerPrivate;
newrec["MaskingKey"] = maskingKey;
newrec["PulseIfUnchanged"] = true;
try {
auto resp = htcli.Post("/makerecord", newrec.dump(), "application/json");
if (resp) {
if (resp->status == 200) {
ns->second.dirty = false;
// printf("SET network %.16llx %s\n",ns->first,resp->body.c_str());
}
else {
fprintf(stderr, "ERROR: LFDB: %d from node (create/update network): %s" ZT_EOL_S, resp->status, resp->body.c_str());
}
}
else {
fprintf(stderr, "ERROR: LFDB: node is offline" ZT_EOL_S);
}
}
catch (std::exception& e) {
fprintf(stderr, "ERROR: LFDB: unexpected exception querying node (create/update network): %s" ZT_EOL_S, e.what());
}
catch (...) {
fprintf(stderr, "ERROR: LFDB: unexpected exception querying node (create/update network): unknown exception" ZT_EOL_S);
}
}
}
for (auto ms = ns->second.members.begin(); ms != ns->second.members.end(); ++ms) {
if ((_storeOnlineState) && (ms->second.lastOnlineDirty) && (ms->second.lastOnlineAddress)) {
nlohmann::json newrec, selector0, selector1, selectors, ip;
char tmp[1024], tmp2[128];
OSUtils::ztsnprintf(tmp, sizeof(tmp), "com.zerotier.controller.lfdb:%s/network/%.16llx/online", controllerAddress, (unsigned long long)ns->first);
ms->second.lastOnlineAddress.toIpString(tmp2);
selector0["Name"] = tmp;
selector0["Ordinal"] = ms->first;
selector1["Name"] = tmp2;
selector1["Ordinal"] = 0;
selectors.push_back(selector0);
selectors.push_back(selector1);
newrec["Selectors"] = selectors;
const uint8_t* const rawip = (const uint8_t*)ms->second.lastOnlineAddress.rawIpData();
switch (ms->second.lastOnlineAddress.ss_family) {
case AF_INET:
for (int j = 0; j < 4; ++j)
ip.push_back((unsigned int)rawip[j]);
break;
case AF_INET6:
for (int j = 0; j < 16; ++j)
ip.push_back((unsigned int)rawip[j]);
break;
default:
ip = tmp2; // should never happen since only IP transport is currently supported
break;
}
newrec["Value"] = ip;
newrec["OwnerPrivate"] = _lfOwnerPrivate;
newrec["MaskingKey"] = maskingKey;
newrec["Timestamp"] = ms->second.lastOnlineTime;
newrec["PulseIfUnchanged"] = true;
try {
auto resp = htcli.Post("/makerecord", newrec.dump(), "application/json");
if (resp) {
if (resp->status == 200) {
ms->second.lastOnlineDirty = false;
// printf("SET member online %.16llx %.10llx %s\n",ns->first,ms->first,resp->body.c_str());
}
else {
fprintf(stderr, "ERROR: LFDB: %d from node (create/update member online status): %s" ZT_EOL_S, resp->status, resp->body.c_str());
}
}
else {
fprintf(stderr, "ERROR: LFDB: node is offline" ZT_EOL_S);
}
}
catch (std::exception& e) {
fprintf(stderr, "ERROR: LFDB: unexpected exception querying node (create/update member online status): %s" ZT_EOL_S, e.what());
}
catch (...) {
fprintf(stderr, "ERROR: LFDB: unexpected exception querying node (create/update member online status): unknown exception" ZT_EOL_S);
}
}
if (ms->second.dirty) {
nlohmann::json network, member;
if (get(ns->first, network, ms->first, member)) {
nlohmann::json newrec, selector0, selector1, selectors;
selector0["Name"] = networksSelectorName;
selector0["Ordinal"] = ns->first;
selector1["Name"] = "member";
selector1["Ordinal"] = ms->first;
selectors.push_back(selector0);
selectors.push_back(selector1);
newrec["Selectors"] = selectors;
newrec["Value"] = member.dump();
newrec["OwnerPrivate"] = _lfOwnerPrivate;
newrec["MaskingKey"] = maskingKey;
newrec["PulseIfUnchanged"] = true;
try {
auto resp = htcli.Post("/makerecord", newrec.dump(), "application/json");
if (resp) {
if (resp->status == 200) {
ms->second.dirty = false;
// printf("SET member %.16llx %.10llx %s\n",ns->first,ms->first,resp->body.c_str());
}
else {
fprintf(stderr, "ERROR: LFDB: %d from node (create/update member): %s" ZT_EOL_S, resp->status, resp->body.c_str());
}
}
else {
fprintf(stderr, "ERROR: LFDB: node is offline" ZT_EOL_S);
}
}
catch (std::exception& e) {
fprintf(stderr, "ERROR: LFDB: unexpected exception querying node (create/update member): %s" ZT_EOL_S, e.what());
}
catch (...) {
fprintf(stderr, "ERROR: LFDB: unexpected exception querying node (create/update member): unknown exception" ZT_EOL_S);
}
}
}
}
}
}
try {
std::ostringstream query;
query << "{"
"\"Ranges\":[{"
"\"Name\":\""
<< networksSelectorName
<< "\","
"\"Range\":[0,18446744073709551615]"
"}],"
"\"TimeRange\":["
<< timeRangeStart
<< ",9223372036854775807],"
"\"MaskingKey\":\""
<< maskingKey
<< "\","
"\"Owners\":[\""
<< _lfOwnerPublic
<< "\"]"
"}";
auto resp = htcli.Post("/query", query.str(), "application/json");
if (resp) {
if (resp->status == 200) {
nlohmann::json results(OSUtils::jsonParse(resp->body));
if ((results.is_array()) && (! results.empty())) {
for (std::size_t ri = 0; ri < results.size(); ++ri) {
nlohmann::json& rset = results[ri];
if ((rset.is_array()) && (! rset.empty())) {
nlohmann::json& result = rset[0];
if (result.is_object()) {
nlohmann::json& record = result["Record"];
if (record.is_object()) {
const std::string recordValue = result["Value"];
// printf("GET network %s\n",recordValue.c_str());
nlohmann::json network(OSUtils::jsonParse(recordValue));
if (network.is_object()) {
const std::string idstr = network["id"];
const uint64_t id = Utils::hexStrToU64(idstr.c_str());
if ((id >> 24) == controllerAddressInt) { // sanity check
nlohmann::json oldNetwork;
if ((timeRangeStart > 0) && (get(id, oldNetwork))) {
const uint64_t revision = network["revision"];
const uint64_t prevRevision = oldNetwork["revision"];
if (prevRevision < revision) {
_networkChanged(oldNetwork, network, timeRangeStart > 0);
}
}
else {
nlohmann::json nullJson;
_networkChanged(nullJson, network, timeRangeStart > 0);
}
}
}
}
}
}
}
}
}
else {
fprintf(stderr, "ERROR: LFDB: %d from node (check for network updates): %s" ZT_EOL_S, resp->status, resp->body.c_str());
}
}
else {
fprintf(stderr, "ERROR: LFDB: node is offline" ZT_EOL_S);
}
}
catch (std::exception& e) {
fprintf(stderr, "ERROR: LFDB: unexpected exception querying node (check for network updates): %s" ZT_EOL_S, e.what());
}
catch (...) {
fprintf(stderr, "ERROR: LFDB: unexpected exception querying node (check for network updates): unknown exception" ZT_EOL_S);
}
try {
std::ostringstream query;
query << "{"
"\"Ranges\":[{"
"\"Name\":\""
<< networksSelectorName
<< "\","
"\"Range\":[0,18446744073709551615]"
"},{"
"\"Name\":\"member\","
"\"Range\":[0,18446744073709551615]"
"}],"
"\"TimeRange\":["
<< timeRangeStart
<< ",9223372036854775807],"
"\"MaskingKey\":\""
<< maskingKey
<< "\","
"\"Owners\":[\""
<< _lfOwnerPublic
<< "\"]"
"}";
auto resp = htcli.Post("/query", query.str(), "application/json");
if (resp) {
if (resp->status == 200) {
nlohmann::json results(OSUtils::jsonParse(resp->body));
if ((results.is_array()) && (! results.empty())) {
for (std::size_t ri = 0; ri < results.size(); ++ri) {
nlohmann::json& rset = results[ri];
if ((rset.is_array()) && (! rset.empty())) {
nlohmann::json& result = rset[0];
if (result.is_object()) {
nlohmann::json& record = result["Record"];
if (record.is_object()) {
const std::string recordValue = result["Value"];
// printf("GET member %s\n",recordValue.c_str());
nlohmann::json member(OSUtils::jsonParse(recordValue));
if (member.is_object()) {
const std::string nwidstr = member["nwid"];
const std::string idstr = member["id"];
const uint64_t nwid = Utils::hexStrToU64(nwidstr.c_str());
const uint64_t id = Utils::hexStrToU64(idstr.c_str());
if ((id) && ((nwid >> 24) == controllerAddressInt)) { // sanity check
nlohmann::json network, oldMember;
if ((timeRangeStart > 0) && (get(nwid, network, id, oldMember))) {
const uint64_t revision = member["revision"];
const uint64_t prevRevision = oldMember["revision"];
if (prevRevision < revision)
_memberChanged(oldMember, member, timeRangeStart > 0);
}
else if (hasNetwork(nwid)) {
nlohmann::json nullJson;
_memberChanged(nullJson, member, timeRangeStart > 0);
}
}
}
}
}
}
}
}
}
else {
fprintf(stderr, "ERROR: LFDB: %d from node (check for member updates): %s" ZT_EOL_S, resp->status, resp->body.c_str());
}
}
else {
fprintf(stderr, "ERROR: LFDB: node is offline" ZT_EOL_S);
}
}
catch (std::exception& e) {
fprintf(stderr, "ERROR: LFDB: unexpected exception querying node (check for member updates): %s" ZT_EOL_S, e.what());
}
catch (...) {
fprintf(stderr, "ERROR: LFDB: unexpected exception querying node (check for member updates): unknown exception" ZT_EOL_S);
}
timeRangeStart = time(nullptr) - 120; // start next query 2m before now to avoid losing updates
_ready.store(true);
for (int k = 0; k < 4; ++k) { // 2s delay between queries for remotely modified networks or members
if (! _running.load())
return;
std::this_thread::sleep_for(std::chrono::milliseconds(500));
}
}
});
}
LFDB::~LFDB()
{
_running.store(false);
_syncThread.join();
}
bool LFDB::waitForReady()
{
while (! _ready.load()) {
std::this_thread::sleep_for(std::chrono::milliseconds(500));
}
return true;
}
bool LFDB::isReady()
{
return (_ready.load());
}
bool LFDB::save(nlohmann::json& record, bool notifyListeners)
{
bool modified = false;
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()) || (! _compareRecords(old, record))) {
record["revision"] = OSUtils::jsonInt(record["revision"], 0ULL) + 1ULL;
_networkChanged(old, record, notifyListeners);
{
std::lock_guard<std::mutex> l(_state_l);
_state[nwid].dirty = true;
}
modified = true;
}
}
}
else if (objtype == "member") {
const uint64_t nwid = OSUtils::jsonIntHex(record["nwid"], 0ULL);
const uint64_t id = OSUtils::jsonIntHex(record["id"], 0ULL);
if ((id) && (nwid)) {
nlohmann::json network, old;
get(nwid, network, id, old);
if ((! old.is_object()) || (! _compareRecords(old, record))) {
record["revision"] = OSUtils::jsonInt(record["revision"], 0ULL) + 1ULL;
_memberChanged(old, record, notifyListeners);
{
std::lock_guard<std::mutex> l(_state_l);
_state[nwid].members[id].dirty = true;
}
modified = true;
}
}
}
return modified;
}
void LFDB::eraseNetwork(const uint64_t networkId)
{
// TODO
}
void LFDB::eraseMember(const uint64_t networkId, const uint64_t memberId)
{
// TODO
}
void LFDB::nodeIsOnline(const uint64_t networkId, const uint64_t memberId, const InetAddress& physicalAddress, const char* osArch)
{
std::lock_guard<std::mutex> l(_state_l);
auto nw = _state.find(networkId);
if (nw != _state.end()) {
auto m = nw->second.members.find(memberId);
if (m != nw->second.members.end()) {
m->second.lastOnlineTime = OSUtils::now();
if (physicalAddress)
m->second.lastOnlineAddress = physicalAddress;
m->second.lastOnlineDirty = true;
}
}
}
void LFDB::nodeIsOnline(const uint64_t networkId, const uint64_t memberId, const InetAddress& physicalAddress)
{
this->nodeIsOnline(networkId, memberId, physicalAddress, "unknown/unknown");
}
} // namespace ZeroTier