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/*
* Copyright 2012 - 2020 Anton Tananaev (anton@traccar.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.traccar;
import io.netty.channel.Channel;
import io.netty.channel.socket.DatagramChannel;
import io.netty.handler.codec.http.HttpRequestDecoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.traccar.config.Config;
import org.traccar.database.ConnectionManager;
import org.traccar.database.IdentityManager;
import org.traccar.database.StatisticsManager;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Device;
import org.traccar.model.Position;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.TimeZone;
public abstract class BaseProtocolDecoder extends ExtendedObjectDecoder {
private static final Logger LOGGER = LoggerFactory.getLogger(BaseProtocolDecoder.class);
private static final String PROTOCOL_UNKNOWN = "unknown";
private final Config config = Context.getConfig();
private final IdentityManager identityManager = Context.getIdentityManager();
private final ConnectionManager connectionManager = Context.getConnectionManager();
private final StatisticsManager statisticsManager;
private final Protocol protocol;
public BaseProtocolDecoder(Protocol protocol) {
this.protocol = protocol;
statisticsManager = Main.getInjector() != null ? Main.getInjector().getInstance(StatisticsManager.class) : null;
}
public String getProtocolName() {
return protocol != null ? protocol.getName() : PROTOCOL_UNKNOWN;
}
public String getServer(Channel channel, char delimiter) {
String server = config.getString(getProtocolName() + ".server");
if (server == null && channel != null) {
InetSocketAddress address = (InetSocketAddress) channel.localAddress();
server = address.getAddress().getHostAddress() + ":" + address.getPort();
}
return server != null ? server.replace(':', delimiter) : null;
}
protected double convertSpeed(double value, String defaultUnits) {
switch (config.getString(getProtocolName() + ".speed", defaultUnits)) {
case "kmh":
return UnitsConverter.knotsFromKph(value);
case "mps":
return UnitsConverter.knotsFromMps(value);
case "mph":
return UnitsConverter.knotsFromMph(value);
case "kn":
default:
return value;
}
}
protected TimeZone getTimeZone(long deviceId) {
return getTimeZone(deviceId, "UTC");
}
protected TimeZone getTimeZone(long deviceId, String defaultTimeZone) {
TimeZone result = TimeZone.getTimeZone(defaultTimeZone);
String timeZoneName = identityManager.lookupAttributeString(deviceId, "decoder.timezone", null, false, true);
if (timeZoneName != null) {
result = TimeZone.getTimeZone(timeZoneName);
} else {
int timeZoneOffset = config.getInteger(getProtocolName() + ".timezone", 0);
if (timeZoneOffset != 0) {
result.setRawOffset(timeZoneOffset * 1000);
LOGGER.warn("Config parameter " + getProtocolName() + ".timezone is deprecated");
}
}
return result;
}
private DeviceSession channelDeviceSession; // connection-based protocols
private Map<SocketAddress, DeviceSession> addressDeviceSessions = new HashMap<>(); // connectionless protocols
private long findDeviceId(SocketAddress remoteAddress, String... uniqueIds) {
if (uniqueIds.length > 0) {
long deviceId = 0;
Device device = null;
try {
for (String uniqueId : uniqueIds) {
if (uniqueId != null) {
device = identityManager.getByUniqueId(uniqueId);
if (device != null) {
deviceId = device.getId();
break;
}
}
}
} catch (Exception e) {
LOGGER.warn("Find device error", e);
}
if (deviceId == 0 && config.getBoolean("database.registerUnknown")) {
return identityManager.addUnknownDevice(uniqueIds[0]);
}
if (device != null && !device.getDisabled() || config.getBoolean("database.storeDisabled")) {
return deviceId;
}
StringBuilder message = new StringBuilder();
if (deviceId == 0) {
message.append("Unknown device -");
} else {
message.append("Disabled device -");
}
for (String uniqueId : uniqueIds) {
message.append(" ").append(uniqueId);
}
if (remoteAddress != null) {
message.append(" (").append(((InetSocketAddress) remoteAddress).getHostString()).append(")");
}
LOGGER.warn(message.toString());
}
return 0;
}
public DeviceSession getDeviceSession(Channel channel, SocketAddress remoteAddress, String... uniqueIds) {
return getDeviceSession(channel, remoteAddress, false, uniqueIds);
}
public DeviceSession getDeviceSession(
Channel channel, SocketAddress remoteAddress, boolean ignoreCache, String... uniqueIds) {
if (channel != null && BasePipelineFactory.getHandler(channel.pipeline(), HttpRequestDecoder.class) != null
|| ignoreCache || config.getBoolean(getProtocolName() + ".ignoreSessionCache")
|| config.getBoolean("decoder.ignoreSessionCache")) {
long deviceId = findDeviceId(remoteAddress, uniqueIds);
if (deviceId != 0) {
if (connectionManager != null) {
connectionManager.addActiveDevice(deviceId, protocol, channel, remoteAddress);
}
return new DeviceSession(deviceId);
} else {
return null;
}
}
if (channel instanceof DatagramChannel) {
long deviceId = findDeviceId(remoteAddress, uniqueIds);
DeviceSession deviceSession = addressDeviceSessions.get(remoteAddress);
if (deviceSession != null && (deviceSession.getDeviceId() == deviceId || uniqueIds.length == 0)) {
return deviceSession;
} else if (deviceId != 0) {
deviceSession = new DeviceSession(deviceId);
addressDeviceSessions.put(remoteAddress, deviceSession);
if (connectionManager != null) {
connectionManager.addActiveDevice(deviceId, protocol, channel, remoteAddress);
}
return deviceSession;
} else {
return null;
}
} else {
if (channelDeviceSession == null) {
long deviceId = findDeviceId(remoteAddress, uniqueIds);
if (deviceId != 0) {
channelDeviceSession = new DeviceSession(deviceId);
if (connectionManager != null) {
connectionManager.addActiveDevice(deviceId, protocol, channel, remoteAddress);
}
}
}
return channelDeviceSession;
}
}
public void getLastLocation(Position position, Date deviceTime) {
if (position.getDeviceId() != 0) {
position.setOutdated(true);
Position last = identityManager.getLastPosition(position.getDeviceId());
if (last != null) {
position.setFixTime(last.getFixTime());
position.setValid(last.getValid());
position.setLatitude(last.getLatitude());
position.setLongitude(last.getLongitude());
position.setAltitude(last.getAltitude());
position.setSpeed(last.getSpeed());
position.setCourse(last.getCourse());
position.setAccuracy(last.getAccuracy());
} else {
position.setFixTime(new Date(0));
}
if (deviceTime != null) {
position.setDeviceTime(deviceTime);
} else {
position.setDeviceTime(new Date());
}
}
}
@Override
protected void onMessageEvent(
Channel channel, SocketAddress remoteAddress, Object originalMessage, Object decodedMessage) {
if (statisticsManager != null) {
statisticsManager.registerMessageReceived();
}
Position position = null;
if (decodedMessage != null) {
if (decodedMessage instanceof Position) {
position = (Position) decodedMessage;
} else if (decodedMessage instanceof Collection) {
Collection<Position> positions = (Collection) decodedMessage;
if (!positions.isEmpty()) {
position = positions.iterator().next();
}
}
}
if (position != null) {
connectionManager.updateDevice(
position.getDeviceId(), Device.STATUS_ONLINE, new Date());
} else {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession != null) {
connectionManager.updateDevice(
deviceSession.getDeviceId(), Device.STATUS_ONLINE, new Date());
}
}
}
@Override
protected Object handleEmptyMessage(Channel channel, SocketAddress remoteAddress, Object msg) {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (config.getBoolean("database.saveEmpty") && deviceSession != null) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, null);
return position;
} else {
return null;
}
}
}
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