Postgres Integration has begun

1 files changed, 377 insertions, 0 deletions

diff --git a/controller/PostgreSQL.cpp b/controller/PostgreSQL.cpp
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+++ b/controller/PostgreSQL.cpp
@@ -0,0 +1,377 @@
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2018  ZeroTier, Inc.
+ *
+ * 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/>.
+ */
+
+#ifdef ZT_CONTROLLER_USE_LIBPQ
+
+#include "PostgreSQL.hpp"
+#include "EmbeddedNetworkController.hpp"
+#include "../version.h"
+
+#include <libpq-fe.h>
+
+using json = nlohmann::json;
+namespace {
+
+static const char *_timestr()
+{
+	time_t t = time(0);
+	char *ts = ctime(&t);
+	char *p = ts;
+	if (!p)
+		return "";
+	while (*p) {
+		if (*p == '\n') {
+			*p = (char)0;
+			break;
+		}
+		++p;
+	}
+	return ts;
+}
+
+}
+
+using namespace ZeroTier;
+
+PostgreSQL::PostgreSQL(EmbeddedNetworkController *const nc, const Identity &myId, const char *path)
+    : DB(nc, myId, path)
+    , _ready(0)
+	, _connected(1)
+    , _run(1)
+    , _waitNoticePrinted(false)
+{
+	_connString = std::string(path);
+
+	_readyLock.lock();
+	_heartbeatThread = std::thread(&PostgreSQL::heartbeat, this);
+	_membersDbWatcher = std::thread(&PostgreSQL::membersDbWatcher, this);
+	_networksDbWatcher = std::thread(&PostgreSQL::networksDbWatcher, this);
+	for (int i = 0; i < ZT_CONTROLLER_RETHINKDB_COMMIT_THREADS; ++i) {
+		_commitThread[i] = std::thread(&PostgreSQL::commitThread, this);
+	}
+	_onlineNotificationThread = std::thread(&PostgreSQL::onlineNotificationThread, this);
+}
+
+PostgreSQL::~PostgreSQL()
+{
+	_run = 0;
+	std::this_thread::sleep_for(std::chrono::milliseconds(100));
+	
+	_heartbeatThread.join();
+	_membersDbWatcher.join();
+	_networksDbWatcher.join();
+	for (int i = 0; i < ZT_CONTROLLER_RETHINKDB_COMMIT_THREADS; ++i) {
+		_commitThread[i].join();
+	}
+	_onlineNotificationThread.join();
+
+}
+
+
+bool PostgreSQL::waitForReady()
+{
+	while (_ready < 2) {
+		if (!_waitNoticePrinted) {
+			_waitNoticePrinted = true;
+			fprintf(stderr, "[%s] NOTICE: %.10llx controller PostgreSQL waiting for initial data download..." ZT_EOL_S, ::_timestr(), (unsigned long long)_myAddress.toInt());
+		}
+		_readyLock.lock();
+		_readyLock.unlock();
+	}
+	return true;
+}
+
+bool PostgreSQL::isReady()
+{
+	return ((_ready == 2)&&(_connected));
+}
+
+void PostgreSQL::save(nlohmann::json *orig, nlohmann::json &record)
+{
+	if (!record.is_object()) {
+		return;
+	}
+	waitForReady();
+	if (orig) {
+		if (*orig != record) {
+			record["revision"] = OSUtils::jsonInt(record["revision"],0ULL) + 1;
+			_commitQueue.post(new nlohmann::json(record));
+		}
+	} else {
+		record["revision"] = 1;
+		_commitQueue.post(new nlohmann::json(record));
+	}
+}
+
+void PostgreSQL::eraseNetwork(const uint64_t networkId)
+{
+	char tmp2[24];
+	waitForReady();
+	Utils::hex(networkId, tmp2);
+	json *tmp = new json();
+	(*tmp)["id"] = tmp2;
+	(*tmp)["objtype"] = "_delete_network";
+	_commitQueue.post(tmp);
+}
+
+void PostgreSQL::eraseMember(const uint64_t networkId, const uint64_t memberId) 
+{
+	char tmp2[24];
+	json *tmp = new json();
+	Utils::hex(networkId, tmp2);
+	(*tmp)["nwid"] = tmp2;
+	Utils::hex(memberId, tmp2);
+	(*tmp)["id"] = tmp2;
+	(*tmp)["objtype"] = "_delete_member";
+	_commitQueue.post(tmp);
+}
+
+void PostgreSQL::nodeIsOnline(const uint64_t networkId, const uint64_t memberId, const InetAddress &physicalAddress)
+{
+	std::lock_guard<std::mutex> l(_lastOnline_l);
+	std::pair<int64_t, InetAddress> &i = _lastOnline[std::pair<uint64_t,uint64_t>(networkId, memberId)];
+	i.first = OSUtils::now();
+	if (physicalAddress) {
+		i.second = physicalAddress;
+	}
+}
+
+void PostgreSQL::initializeNetworks(PGconn *conn)
+{
+	// TODO: do stuff here
+
+	if (++this->_ready == 2) {
+		if (_waitNoticePrinted) {
+			fprintf(stderr,"[%s] NOTICE: %.10llx controller RethinkDB data download complete." ZT_EOL_S,_timestr(),(unsigned long long)_myAddress.toInt());
+		}
+		_readyLock.unlock();
+	}
+}
+
+void PostgreSQL::initializeMembers(PGconn *conn)
+{
+	// TODO: do stuff here
+
+	if (++this->_ready == 2) {
+		if (_waitNoticePrinted) {
+			fprintf(stderr,"[%s] NOTICE: %.10llx controller RethinkDB data download complete." ZT_EOL_S,_timestr(),(unsigned long long)_myAddress.toInt());
+		}
+		_readyLock.unlock();
+	}
+}
+
+void PostgreSQL::heartbeat()
+{
+	char publicId[1024];
+	char hostnameTmp[1024];
+	_myId.toString(false,publicId);
+	if (gethostname(hostnameTmp, sizeof(hostnameTmp))!= 0) {
+		hostnameTmp[0] = (char)0;
+	} else {
+		for (int i = 0; i < sizeof(hostnameTmp); ++i) {
+			if ((hostnameTmp[i] == '.')||(hostnameTmp[i] == 0)) {
+				hostnameTmp[i] = (char)0;
+				break;
+			}
+		}
+	}
+	const char *controllerId = _myAddressStr.c_str();
+	const char *publicIdentity = publicId;
+	const char *hostname = hostnameTmp;
+
+	PGconn *conn = PQconnectdb(_path.c_str());
+	if (PQstatus(conn) == CONNECTION_BAD) {
+		fprintf(stderr, "Connection to database failed: %s\n", PQerrorMessage(conn));
+		PQfinish(conn);
+		exit(1);
+	}
+	while (_run == 1) {
+		if(PQstatus(conn) != CONNECTION_OK) {
+			PQfinish(conn);
+			conn = PQconnectdb(_path.c_str());
+		}
+		if (conn) {
+			const char *values[8] = {
+				controllerId,
+				hostname,
+				std::to_string(OSUtils::now()).c_str(),
+				publicIdentity,
+				std::to_string(ZEROTIER_ONE_VERSION_MAJOR).c_str(),
+				std::to_string(ZEROTIER_ONE_VERSION_MINOR).c_str(),
+				std::to_string(ZEROTIER_ONE_VERSION_REVISION).c_str(),
+				std::to_string(ZEROTIER_ONE_VERSION_BUILD).c_str()
+			};
+			int lengths[8] = {
+				(int)strlen(values[0]),
+				(int)strlen(values[1]),
+				(int)strlen(values[2]),
+				(int)strlen(values[3]),
+				(int)strlen(values[4]),
+				(int)strlen(values[5]),
+				(int)strlen(values[6]),
+				(int)strlen(values[7])
+			};
+			int binary[8] = {0,0,0,0,0,0,0,0};
+
+			PGresult *res = PQexecParams(conn,
+				"INSERT INTO ztc_controller (id, cluster_host, last_alive, public_identity, v_major, v_minor, v_rev, v_build) " 
+				"VALUES ($1, $2, TO_TIMESTAMP($3::double precision/1000), $4, $5, $6, $7, $8) "
+				"ON CONFLICT (id) DO UPDATE SET cluster_host = EXCLUDED.cluster_host, last_alive = EXCLUDED.last_alive, "
+				"public_identity = EXCLUDED.public_identity, v_major = EXCLUDED.v_major, v_minor = EXCLUDED.v_minor, "
+				"v_rev = EXCLUDED.v_rev, v_build = EXCLUDED.v_rev",
+				8,       // number of parameters
+				NULL,    // oid field.   ignore
+				values,  // values for substitution
+				lengths, // lengths in bytes of each value
+				binary,  // binary?
+				0);
+
+			if (PQresultStatus(res) != PGRES_COMMAND_OK) {
+				fprintf(stderr, "Heartbeat Update Failed: %s\n", PQresultErrorMessage(res));
+			}
+			PQclear(res);
+		}
+
+		std::this_thread::sleep_for(std::chrono::milliseconds(1000));
+	}
+
+	PQfinish(conn);
+	conn = NULL;
+}
+
+void PostgreSQL::membersDbWatcher()
+{
+	PGconn *conn = PQconnectdb(_path.c_str());
+	if (PQstatus(conn) == CONNECTION_BAD) {
+		fprintf(stderr, "Connection to database failed: %s\n", PQerrorMessage(conn));
+		PQfinish(conn);
+		exit(1);
+	}
+
+	initializeMembers(conn);
+
+	char buf[11] = {0};
+	std::string cmd = "LISTEN member_" + std::string(_myAddress.toString(buf));
+	PGresult *res = PQexec(conn, cmd.c_str());
+	if (!res || PQresultStatus(res) != PGRES_COMMAND_OK) {
+		fprintf(stderr, "LISTEN command failed: %s\n", PQresultErrorMessage(res));
+		PQclear(res);
+		PQfinish(conn);
+		exit(1);
+	}
+
+	while(_run == 1) {
+		if (PQstatus(conn) != CONNECTION_OK) {
+			fprintf(stderr, "ERROR: Member Watcher lost connection to Postgres.");
+			exit(-1);
+		}
+		PGnotify *notify = NULL;
+		PQconsumeInput(conn);
+		while ((notify = PQnotifies(conn)) != NULL) {
+			fprintf(stderr, "ASYNC NOTIFY of '%s' id:%s received\n", notify->relname, notify->extra);
+
+			try {
+				json tmp(json::parse(notify->extra));
+				json &ov = tmp["old_val"];
+				json &nv = tmp["new_val"];
+				json oldConfig, newConfig;
+				if (ov.is_object()) oldConfig = ov;
+				if (nv.is_object()) newConfig = nv;
+				if (oldConfig.is_object() || newConfig.is_object()) {
+					_memberChanged(oldConfig,newConfig,(this->_ready>=2));
+				}
+			} catch (...) {} // ignore bad records
+
+			free(notify);
+		}
+		std::this_thread::sleep_for(std::chrono::milliseconds(10));
+	}
+	PQfinish(conn);
+	conn = NULL;
+}
+
+void PostgreSQL::networksDbWatcher()
+{
+	PGconn *conn = PQconnectdb(_path.c_str());
+	if (PQstatus(conn) == CONNECTION_BAD) {
+		fprintf(stderr, "Connection to database failed: %s\n", PQerrorMessage(conn));
+		PQfinish(conn);
+		exit(1);
+	}
+
+	initializeNetworks(conn);
+
+	char buf[11] = {0};
+	std::string cmd = "LISTEN network_" + std::string(_myAddress.toString(buf));
+	PGresult *res = PQexec(conn, cmd.c_str());
+	if (!res || PQresultStatus(res) != PGRES_COMMAND_OK) {
+		fprintf(stderr, "LISTEN command failed: %s\n", PQresultErrorMessage(res));
+		PQclear(res);
+		PQfinish(conn);
+		exit(1);
+	}
+
+	while(_run == 1) {
+		if (PQstatus(conn) != CONNECTION_OK) {
+			fprintf(stderr, "ERROR: Network Watcher lost connection to Postgres.");
+			exit(-1);
+		}
+		PGnotify *notify = NULL;
+		PQconsumeInput(conn);
+		while ((notify = PQnotifies(conn)) != NULL) {
+			fprintf(stderr, "ASYNC NOTIFY of '%s' id:%s received\n", notify->relname, notify->extra);
+			try {
+				json tmp(json::parse(notify->extra));
+				json &ov = tmp["old_val"];
+				json &nv = tmp["new_val"];
+				json oldConfig, newConfig;
+				if (ov.is_object()) oldConfig = ov;
+				if (nv.is_object()) newConfig = nv;
+				if (oldConfig.is_object()||newConfig.is_object()) {
+					_networkChanged(oldConfig,newConfig,(this->_ready >= 2));
+				}
+			} catch (...) {} // ignore bad records
+			free(notify);
+		}
+		std::this_thread::sleep_for(std::chrono::milliseconds(10));
+	}
+	PQfinish(conn);
+	conn = NULL;
+}
+
+void PostgreSQL::commitThread()
+{
+	json *config = nullptr;
+	while(_commitQueue.get(config)&(_run == 1)) {
+		if (!config) {
+			continue;
+		}
+
+		std::this_thread::sleep_for(std::chrono::milliseconds(10));
+	}
+}
+
+void PostgreSQL::onlineNotificationThread()
+{
+	_connected = 1;
+
+	while (_run == 1) {
+		std::this_thread::sleep_for(std::chrono::milliseconds(250));
+	}
+}
+#endif //ZT_CONTROLLER_USE_LIBPQ
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