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authorAnton Tananaev <anton.tananaev@gmail.com>2019-03-31 22:35:39 -0700
committerAnton Tananaev <anton.tananaev@gmail.com>2019-03-31 22:35:39 -0700
commit59416923dcb3a756eaf532cc4259f2f6625c0762 (patch)
tree9082dae6616deac8fda432b7bfd80e4a52b6d9dc /src/main/java/org/traccar/protocol/AplicomProtocolDecoder.java
parent79a129dd6327d932133d6b9a50190d3f4927bff9 (diff)
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Convert project to gradle
Diffstat (limited to 'src/main/java/org/traccar/protocol/AplicomProtocolDecoder.java')
-rw-r--r--src/main/java/org/traccar/protocol/AplicomProtocolDecoder.java702
1 files changed, 702 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/AplicomProtocolDecoder.java b/src/main/java/org/traccar/protocol/AplicomProtocolDecoder.java
new file mode 100644
index 000000000..215aa0211
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AplicomProtocolDecoder.java
@@ -0,0 +1,702 @@
+/*
+ * Copyright 2013 - 2018 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.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.channel.Channel;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Date;
+
+public class AplicomProtocolDecoder extends BaseProtocolDecoder {
+
+ private static final Logger LOGGER = LoggerFactory.getLogger(AplicomProtocolDecoder.class);
+
+ public AplicomProtocolDecoder(Protocol protocol) {
+ super(protocol);
+ }
+
+ private static final long IMEI_BASE_TC65_V20 = 0x1437207000000L;
+ private static final long IMEI_BASE_TC65_V28 = 358244010000000L;
+ private static final long IMEI_BASE_TC65I_V11 = 0x14143B4000000L;
+
+ private static boolean validateImei(long imei) {
+ return Checksum.luhn(imei / 10) == imei % 10;
+ }
+
+ private static long imeiFromUnitId(long unitId) {
+
+ if (unitId == 0) {
+
+ return 0;
+
+ } else {
+
+ // Try TC65i
+ long imei = IMEI_BASE_TC65I_V11 + unitId;
+ if (validateImei(imei)) {
+ return imei;
+ }
+
+ // Try TC65 v2.8
+ imei = IMEI_BASE_TC65_V28 + ((unitId + 0xA8180) & 0xFFFFFF);
+ if (validateImei(imei)) {
+ return imei;
+ }
+
+ // Try TC65 v2.0
+ imei = IMEI_BASE_TC65_V20 + unitId;
+ if (validateImei(imei)) {
+ return imei;
+ }
+
+ }
+
+ return unitId;
+ }
+
+ private static final int DEFAULT_SELECTOR_D = 0x0002fC;
+ private static final int DEFAULT_SELECTOR_E = 0x007ffc;
+ private static final int DEFAULT_SELECTOR_F = 0x0007fd;
+
+ private static final int EVENT_DATA = 119;
+
+ private void decodeEventData(Position position, ByteBuf buf, int event) {
+ switch (event) {
+ case 2:
+ case 40:
+ buf.readUnsignedByte();
+ break;
+ case 9:
+ buf.readUnsignedMedium();
+ break;
+ case 31:
+ case 32:
+ buf.readUnsignedShort();
+ break;
+ case 38:
+ buf.skipBytes(4 * 9);
+ break;
+ case 113:
+ buf.readUnsignedInt();
+ buf.readUnsignedByte();
+ break;
+ case 119:
+ position.set("eventData", ByteBufUtil.hexDump(
+ buf, buf.readerIndex(), Math.min(buf.readableBytes(), 1024)));
+ break;
+ case 121:
+ case 142:
+ buf.readLong();
+ break;
+ case 130:
+ buf.readUnsignedInt(); // incorrect
+ break;
+ case 188:
+ decodeEB(position, buf);
+ break;
+ default:
+ break;
+ }
+ }
+
+ private void decodeCanData(ByteBuf buf, Position position) {
+
+ buf.readUnsignedMedium(); // packet identifier
+ position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
+ int count = buf.readUnsignedByte();
+ buf.readUnsignedByte(); // batch count
+ buf.readUnsignedShort(); // selector bit
+ buf.readUnsignedInt(); // timestamp
+
+ buf.skipBytes(8);
+
+ ArrayList<ByteBuf> values = new ArrayList<>(count);
+
+ for (int i = 0; i < count; i++) {
+ values.add(buf.readSlice(8));
+ }
+
+ for (int i = 0; i < count; i++) {
+ ByteBuf value = values.get(i);
+ switch (buf.readInt()) {
+ case 0x20D:
+ position.set(Position.KEY_RPM, value.readShortLE());
+ position.set("dieselTemperature", value.readShortLE() * 0.1);
+ position.set("batteryVoltage", value.readShortLE() * 0.01);
+ position.set("supplyAirTempDep1", value.readShortLE() * 0.1);
+ break;
+ case 0x30D:
+ position.set("activeAlarm", ByteBufUtil.hexDump(value));
+ break;
+ case 0x40C:
+ position.set("airTempDep1", value.readShortLE() * 0.1);
+ position.set("airTempDep2", value.readShortLE() * 0.1);
+ break;
+ case 0x40D:
+ position.set("coldUnitState", ByteBufUtil.hexDump(value));
+ break;
+ case 0x50C:
+ position.set("defrostTempDep1", value.readShortLE() * 0.1);
+ position.set("defrostTempDep2", value.readShortLE() * 0.1);
+ break;
+ case 0x50D:
+ position.set("condenserPressure", value.readShortLE() * 0.1);
+ position.set("suctionPressure", value.readShortLE() * 0.1);
+ break;
+ case 0x58C:
+ value.readByte();
+ value.readShort(); // index
+ switch (value.readByte()) {
+ case 0x01:
+ position.set("setpointZone1", value.readIntLE() * 0.1);
+ break;
+ case 0x02:
+ position.set("setpointZone2", value.readIntLE() * 0.1);
+ break;
+ case 0x05:
+ position.set("unitType", value.readIntLE());
+ break;
+ case 0x13:
+ position.set("dieselHours", value.readIntLE() / 60 / 60);
+ break;
+ case 0x14:
+ position.set("electricHours", value.readIntLE() / 60 / 60);
+ break;
+ case 0x17:
+ position.set("serviceIndicator", value.readIntLE());
+ break;
+ case 0x18:
+ position.set("softwareVersion", value.readIntLE() * 0.01);
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ LOGGER.warn("Aplicom CAN decoding error", new UnsupportedOperationException());
+ break;
+ }
+ }
+ }
+
+ private void decodeD(Position position, ByteBuf buf, int selector, int event) {
+
+ if ((selector & 0x0008) != 0) {
+ position.setValid((buf.readUnsignedByte() & 0x40) != 0);
+ } else {
+ getLastLocation(position, null);
+ }
+
+ if ((selector & 0x0004) != 0) {
+ position.setDeviceTime(new Date(buf.readUnsignedInt() * 1000));
+ }
+
+ if ((selector & 0x0008) != 0) {
+ position.setFixTime(new Date(buf.readUnsignedInt() * 1000));
+ if (position.getDeviceTime() == null) {
+ position.setDeviceTime(position.getFixTime());
+ }
+ position.setLatitude(buf.readInt() / 1000000.0);
+ position.setLongitude(buf.readInt() / 1000000.0);
+ position.set(Position.KEY_SATELLITES_VISIBLE, buf.readUnsignedByte());
+ }
+
+ if ((selector & 0x0010) != 0) {
+ position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+ position.set("maximumSpeed", buf.readUnsignedByte());
+ position.setCourse(buf.readUnsignedByte() * 2.0);
+ }
+
+ if ((selector & 0x0040) != 0) {
+ position.set(Position.KEY_INPUT, buf.readUnsignedByte());
+ }
+
+ if ((selector & 0x0020) != 0) {
+ position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
+ position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort());
+ position.set(Position.PREFIX_ADC + 3, buf.readUnsignedShort());
+ position.set(Position.PREFIX_ADC + 4, buf.readUnsignedShort());
+ }
+
+ if ((selector & 0x8000) != 0) {
+ position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.001);
+ position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.001);
+ }
+
+ // Pulse rate 1
+ if ((selector & 0x10000) != 0) {
+ buf.readUnsignedShort();
+ buf.readUnsignedInt();
+ }
+
+ // Pulse rate 2
+ if ((selector & 0x20000) != 0) {
+ buf.readUnsignedShort();
+ buf.readUnsignedInt();
+ }
+
+ if ((selector & 0x0080) != 0) {
+ position.set("trip1", buf.readUnsignedInt());
+ }
+
+ if ((selector & 0x0100) != 0) {
+ position.set("trip2", buf.readUnsignedInt());
+ }
+
+ if ((selector & 0x0040) != 0) {
+ position.set(Position.KEY_OUTPUT, buf.readUnsignedByte());
+ }
+
+ if ((selector & 0x0200) != 0) {
+ position.set(Position.KEY_DRIVER_UNIQUE_ID,
+ String.valueOf(((long) buf.readUnsignedShort()) << 32) + buf.readUnsignedInt());
+ }
+
+ if ((selector & 0x0400) != 0) {
+ buf.readUnsignedByte(); // Keypad
+ }
+
+ if ((selector & 0x0800) != 0) {
+ position.setAltitude(buf.readShort());
+ }
+
+ if ((selector & 0x2000) != 0) {
+ buf.readUnsignedShort(); // snapshot counter
+ }
+
+ if ((selector & 0x4000) != 0) {
+ buf.skipBytes(8); // state flags
+ }
+
+ if ((selector & 0x80000) != 0) {
+ buf.skipBytes(11); // cell info
+ }
+
+ if ((selector & 0x1000) != 0) {
+ decodeEventData(position, buf, event);
+ }
+
+ if (Context.getConfig().getBoolean(getProtocolName() + ".can")
+ && buf.isReadable() && (selector & 0x1000) != 0 && event == EVENT_DATA) {
+ decodeCanData(buf, position);
+ }
+ }
+
+ private void decodeE(Position position, ByteBuf buf, int selector) {
+
+ if ((selector & 0x0008) != 0) {
+ position.set("tachographEvent", buf.readUnsignedShort());
+ }
+
+ if ((selector & 0x0004) != 0) {
+ getLastLocation(position, new Date(buf.readUnsignedInt() * 1000));
+ } else {
+ getLastLocation(position, null);
+ }
+
+ if ((selector & 0x0010) != 0) {
+ String time = buf.readUnsignedByte() + "s " + buf.readUnsignedByte() + "m " + buf.readUnsignedByte() + "h "
+ + buf.readUnsignedByte() + "M " + buf.readUnsignedByte() + "D " + buf.readUnsignedByte() + "Y "
+ + buf.readByte() + "m " + buf.readByte() + "h";
+ position.set("tachographTime", time);
+ }
+
+ position.set("workState", buf.readUnsignedByte());
+ position.set("driver1State", buf.readUnsignedByte());
+ position.set("driver2State", buf.readUnsignedByte());
+
+ if ((selector & 0x0020) != 0) {
+ position.set("tachographStatus", buf.readUnsignedByte());
+ }
+
+ if ((selector & 0x0040) != 0) {
+ position.set(Position.KEY_OBD_SPEED, buf.readUnsignedShort() / 256.0);
+ }
+
+ if ((selector & 0x0080) != 0) {
+ position.set(Position.KEY_OBD_ODOMETER, buf.readUnsignedInt() * 5);
+ }
+
+ if ((selector & 0x0100) != 0) {
+ position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedInt() * 5);
+ }
+
+ if ((selector & 0x8000) != 0) {
+ position.set("kFactor", buf.readUnsignedShort() * 0.001 + " pulses/m");
+ }
+
+ if ((selector & 0x0200) != 0) {
+ position.set(Position.KEY_RPM, buf.readUnsignedShort() * 0.125);
+ }
+
+ if ((selector & 0x0400) != 0) {
+ position.set("extraInfo", buf.readUnsignedShort());
+ }
+
+ if ((selector & 0x0800) != 0) {
+ position.set(Position.KEY_VIN, buf.readSlice(18).toString(StandardCharsets.US_ASCII).trim());
+ }
+
+ if ((selector & 0x2000) != 0) {
+ buf.readUnsignedByte(); // card 1 type
+ buf.readUnsignedByte(); // card 1 country code
+ String card = buf.readSlice(20).toString(StandardCharsets.US_ASCII).trim();
+ if (!card.isEmpty()) {
+ position.set("card1", card);
+ }
+ }
+
+ if ((selector & 0x4000) != 0) {
+ buf.readUnsignedByte(); // card 2 type
+ buf.readUnsignedByte(); // card 2 country code
+ String card = buf.readSlice(20).toString(StandardCharsets.US_ASCII).trim();
+ if (!card.isEmpty()) {
+ position.set("card2", card);
+ }
+ }
+
+ if ((selector & 0x10000) != 0) {
+ int count = buf.readUnsignedByte();
+ for (int i = 1; i <= count; i++) {
+ position.set("driver" + i, buf.readSlice(22).toString(StandardCharsets.US_ASCII).trim());
+ position.set("driverTime" + i, buf.readUnsignedInt());
+ }
+ }
+ }
+
+ private void decodeH(Position position, ByteBuf buf, int selector) {
+
+ if ((selector & 0x0004) != 0) {
+ getLastLocation(position, new Date(buf.readUnsignedInt() * 1000));
+ } else {
+ getLastLocation(position, null);
+ }
+
+ if ((selector & 0x0040) != 0) {
+ buf.readUnsignedInt(); // reset time
+ }
+
+ if ((selector & 0x2000) != 0) {
+ buf.readUnsignedShort(); // snapshot counter
+ }
+
+ int index = 1;
+ while (buf.readableBytes() > 0) {
+
+ position.set("h" + index + "Index", buf.readUnsignedByte());
+
+ buf.readUnsignedShort(); // length
+
+ int n = buf.readUnsignedByte();
+ int m = buf.readUnsignedByte();
+
+ position.set("h" + index + "XLength", n);
+ position.set("h" + index + "YLength", m);
+
+ if ((selector & 0x0008) != 0) {
+ position.set("h" + index + "XType", buf.readUnsignedByte());
+ position.set("h" + index + "YType", buf.readUnsignedByte());
+ position.set("h" + index + "Parameters", buf.readUnsignedByte());
+ }
+
+ boolean percentageFormat = (selector & 0x0020) != 0;
+
+ StringBuilder data = new StringBuilder();
+ for (int i = 0; i < n * m; i++) {
+ if (percentageFormat) {
+ data.append(buf.readUnsignedByte() * 0.5).append("%").append(" ");
+ } else {
+ data.append(buf.readUnsignedShort()).append(" ");
+ }
+ }
+
+ position.set("h" + index + "Data", data.toString().trim());
+
+ position.set("h" + index + "Total", buf.readUnsignedInt());
+
+ if ((selector & 0x0010) != 0) {
+ int k = buf.readUnsignedByte();
+
+ data = new StringBuilder();
+ for (int i = 1; i < n; i++) {
+ if (k == 1) {
+ data.append(buf.readByte()).append(" ");
+ } else if (k == 2) {
+ data.append(buf.readShort()).append(" ");
+ }
+ }
+ position.set("h" + index + "XLimits", data.toString().trim());
+
+ data = new StringBuilder();
+ for (int i = 1; i < m; i++) {
+ if (k == 1) {
+ data.append(buf.readByte()).append(" ");
+ } else if (k == 2) {
+ data.append(buf.readShort()).append(" ");
+ }
+ }
+ position.set("h" + index + "YLimits", data.toString().trim());
+ }
+
+ index += 1;
+ }
+ }
+
+ private void decodeEB(Position position, ByteBuf buf) {
+
+ if (buf.readByte() != (byte) 'E' || buf.readByte() != (byte) 'B') {
+ return;
+ }
+
+ position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
+ position.set(Position.KEY_EVENT, buf.readUnsignedShort());
+ position.set("dataValidity", buf.readUnsignedByte());
+ position.set("towed", buf.readUnsignedByte());
+ buf.readUnsignedShort(); // length
+
+ while (buf.readableBytes() > 0) {
+ buf.readUnsignedByte(); // towed position
+ int type = buf.readUnsignedByte();
+ int length = buf.readUnsignedByte();
+ int end = buf.readerIndex() + length;
+
+ switch (type) {
+ case 0x01:
+ position.set("brakeFlags", ByteBufUtil.hexDump(buf.readSlice(length)));
+ break;
+ case 0x02:
+ position.set("wheelSpeed", buf.readUnsignedShort() / 256.0);
+ position.set("wheelSpeedDifference", buf.readUnsignedShort() / 256.0 - 125.0);
+ position.set("lateralAcceleration", buf.readUnsignedByte() / 10.0 - 12.5);
+ position.set("vehicleSpeed", buf.readUnsignedShort() / 256.0);
+ break;
+ case 0x03:
+ position.set(Position.KEY_AXLE_WEIGHT, buf.readUnsignedShort() * 2);
+ break;
+ case 0x04:
+ position.set("tyrePressure", buf.readUnsignedByte() * 10);
+ position.set("pneumaticPressure", buf.readUnsignedByte() * 5);
+ break;
+ case 0x05:
+ position.set("brakeLining", buf.readUnsignedByte() * 0.4);
+ position.set("brakeTemperature", buf.readUnsignedByte() * 10);
+ break;
+ case 0x06:
+ position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 5L);
+ position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedInt() * 5L);
+ position.set(Position.KEY_ODOMETER_SERVICE, (buf.readUnsignedInt() - 2105540607) * 5L);
+ break;
+ case 0x0A:
+ position.set("absStatusCounter", buf.readUnsignedShort());
+ position.set("atvbStatusCounter", buf.readUnsignedShort());
+ position.set("vdcActiveCounter", buf.readUnsignedShort());
+ break;
+ case 0x0B:
+ position.set("brakeMinMaxData", ByteBufUtil.hexDump(buf.readSlice(length)));
+ break;
+ case 0x0C:
+ position.set("missingPgn", ByteBufUtil.hexDump(buf.readSlice(length)));
+ break;
+ case 0x0D:
+ buf.readUnsignedByte();
+ position.set("towedDetectionStatus", buf.readUnsignedInt());
+ buf.skipBytes(17); // vin
+ break;
+ case 0x0E:
+ default:
+ break;
+ }
+
+ buf.readerIndex(end);
+ }
+ }
+
+ private void decodeF(Position position, ByteBuf buf, int selector) {
+
+ Date deviceTime = null;
+
+ if ((selector & 0x0004) != 0) {
+ deviceTime = new Date(buf.readUnsignedInt() * 1000);
+ }
+
+ getLastLocation(position, deviceTime);
+
+ buf.readUnsignedByte(); // data validity
+
+ if ((selector & 0x0008) != 0) {
+ position.set(Position.KEY_RPM, buf.readUnsignedShort());
+ position.set("rpmMax", buf.readUnsignedShort());
+ position.set("rpmMin", buf.readUnsignedShort());
+ }
+
+ if ((selector & 0x0010) != 0) {
+ position.set("engineTemp", buf.readShort());
+ position.set("engineTempMax", buf.readShort());
+ position.set("engineTempMin", buf.readShort());
+ }
+
+ if ((selector & 0x0020) != 0) {
+ position.set(Position.KEY_HOURS, UnitsConverter.msFromHours(buf.readUnsignedInt()));
+ position.set("serviceDistance", buf.readInt());
+ position.set("driverActivity", buf.readUnsignedByte());
+ position.set(Position.KEY_THROTTLE, buf.readUnsignedByte());
+ position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte());
+ }
+
+ if ((selector & 0x0040) != 0) {
+ position.set(Position.KEY_FUEL_USED, buf.readUnsignedInt());
+ }
+
+ if ((selector & 0x0080) != 0) {
+ position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
+ }
+
+ if ((selector & 0x0100) != 0) {
+ position.set(Position.KEY_OBD_SPEED, buf.readUnsignedByte());
+ position.set("speedMax", buf.readUnsignedByte());
+ position.set("speedMin", buf.readUnsignedByte());
+ position.set("hardBraking", buf.readUnsignedByte());
+ }
+
+ if ((selector & 0x0200) != 0) {
+ position.set("tachographSpeed", buf.readUnsignedByte());
+ position.set("driver1State", buf.readUnsignedByte());
+ position.set("driver2State", buf.readUnsignedByte());
+ position.set("tachographStatus", buf.readUnsignedByte());
+ position.set("overspeedCount", buf.readUnsignedByte());
+ }
+
+ if ((selector & 0x0800) != 0) {
+ position.set(Position.KEY_HOURS, buf.readUnsignedInt() * 0.05);
+ position.set(Position.KEY_RPM, buf.readUnsignedShort() * 0.125);
+ position.set(Position.KEY_OBD_SPEED, buf.readUnsignedShort() / 256.0);
+ position.set(Position.KEY_FUEL_USED, buf.readUnsignedInt() * 0.5);
+ position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte() * 0.4);
+ }
+
+ if ((selector & 0x1000) != 0) {
+ position.set("ambientTemperature", buf.readUnsignedShort() * 0.03125 - 273);
+ buf.readUnsignedShort(); // fuel rate
+ position.set("fuelEconomy", buf.readUnsignedShort() / 512.0);
+ position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedInt() * 0.001);
+ buf.readUnsignedByte(); // pto drive engagement
+ }
+
+ if ((selector & 0x2000) != 0) {
+ buf.skipBytes(buf.readUnsignedByte()); // driver identification
+ }
+
+ if ((selector & 0x4000) != 0) {
+ position.set("torque", buf.readUnsignedByte());
+ position.set("brakePressure1", buf.readUnsignedByte() * 8);
+ position.set("brakePressure2", buf.readUnsignedByte() * 8);
+ position.set("grossWeight", buf.readUnsignedShort() * 10);
+ position.set("exhaustFluid", buf.readUnsignedByte() * 0.4);
+ buf.readUnsignedByte(); // retarder torque mode
+ position.set("retarderTorque", buf.readUnsignedByte());
+ position.set("retarderSelection", buf.readUnsignedByte() * 0.4);
+ buf.skipBytes(8); // tell tale status block 1
+ buf.skipBytes(8); // tell tale status block 2
+ buf.skipBytes(8); // tell tale status block 3
+ buf.skipBytes(8); // tell tale status block 4
+ }
+
+ if ((selector & 0x8000) != 0) {
+ position.set("parkingBrakeStatus", buf.readUnsignedByte());
+ position.set("doorStatus", buf.readUnsignedByte());
+ buf.skipBytes(8); // status per door
+ position.set("alternatorStatus", buf.readUnsignedByte());
+ position.set("selectedGear", buf.readUnsignedByte());
+ position.set("currentGear", buf.readUnsignedByte());
+ buf.skipBytes(4 * 2); // air suspension pressure
+ }
+
+ if ((selector & 0x0400) != 0) {
+ int count = buf.readUnsignedByte();
+ for (int i = 0; i < count; i++) {
+ position.set("axle" + i, buf.readUnsignedShort());
+ }
+ }
+
+ }
+
+ @Override
+ protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+ ByteBuf buf = (ByteBuf) msg;
+
+ char protocol = (char) buf.readByte();
+ int version = buf.readUnsignedByte();
+
+ String imei;
+ if ((version & 0x80) != 0) {
+ imei = String.valueOf((buf.readUnsignedInt() << (3 * 8)) | buf.readUnsignedMedium());
+ } else {
+ imei = String.valueOf(imeiFromUnitId(buf.readUnsignedMedium()));
+ }
+
+ buf.readUnsignedShort(); // length
+
+ int selector = DEFAULT_SELECTOR_D;
+ if (protocol == 'E') {
+ selector = DEFAULT_SELECTOR_E;
+ } else if (protocol == 'F') {
+ selector = DEFAULT_SELECTOR_F;
+ }
+ if ((version & 0x40) != 0) {
+ selector = buf.readUnsignedMedium();
+ }
+
+ Position position = new Position(getProtocolName());
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+ if (deviceSession == null) {
+ return null;
+ }
+ position.setDeviceId(deviceSession.getDeviceId());
+
+ int event = buf.readUnsignedByte();
+ position.set(Position.KEY_EVENT, event);
+ position.set("eventInfo", buf.readUnsignedByte());
+
+ if (protocol == 'D') {
+ decodeD(position, buf, selector, event);
+ } else if (protocol == 'E') {
+ decodeE(position, buf, selector);
+ } else if (protocol == 'H') {
+ decodeH(position, buf, selector);
+ } else if (protocol == 'F') {
+ decodeF(position, buf, selector);
+ } else {
+ return null;
+ }
+
+ return position;
+ }
+
+}