diff options
Diffstat (limited to 'src/main/java/org/traccar/protocol/NdtpV6ProtocolDecoder.java')
| -rw-r--r-- | src/main/java/org/traccar/protocol/NdtpV6ProtocolDecoder.java | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/NdtpV6ProtocolDecoder.java b/src/main/java/org/traccar/protocol/NdtpV6ProtocolDecoder.java new file mode 100644 index 000000000..35cb0bae8 --- /dev/null +++ b/src/main/java/org/traccar/protocol/NdtpV6ProtocolDecoder.java @@ -0,0 +1,203 @@ +/* + * Copyright 2022 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.Unpooled; +import io.netty.channel.Channel; +import org.traccar.BaseProtocolDecoder; +import org.traccar.NetworkMessage; +import org.traccar.Protocol; +import org.traccar.helper.BitUtil; +import org.traccar.helper.Checksum; +import org.traccar.helper.UnitsConverter; +import org.traccar.model.Position; +import org.traccar.session.DeviceSession; + +import java.net.SocketAddress; +import java.util.Date; + +public class NdtpV6ProtocolDecoder extends BaseProtocolDecoder { + + public NdtpV6ProtocolDecoder(Protocol protocol) { + super(protocol); + } + + private static final byte[] SIGNATURE = {0x7E, 0x7E}; + + private static final int NPL_FLAG_CRC = 2; + private static final int NPH_RESULT_OK = 0x00000000; + private static final int NPL_TYPE_NPH = 2; + private static final int NPL_ADDRESS_SERVER = 0; + + private static final int NPH_RESULT = 0; + + private static final int NPH_SRV_GENERIC_CONTROLS = 0; + private static final int NPH_SRV_NAVDATA = 1; + + private static final int NPH_SGC_RESULT = NPH_RESULT; + private static final int NPH_SGC_CONN_REQUEST = 100; + + private static final int NPH_SND_RESULT = NPH_RESULT; + + private void sendResponse( + Channel channel, int serviceId, long requestId) { + + ByteBuf content = Unpooled.buffer(); + content.writeShortLE(serviceId); + content.writeIntLE(NPH_SND_RESULT); + content.writeIntLE((int) requestId); + content.writeIntLE(NPH_RESULT_OK); + + ByteBuf response = Unpooled.buffer(); + response.writeBytes(SIGNATURE); + response.writeShortLE(content.readableBytes()); + response.writeShortLE(NPL_FLAG_CRC); // flags + response.writeShort(Checksum.crc16(Checksum.CRC16_MODBUS, content.nioBuffer())); + response.writeByte(NPL_TYPE_NPH); // type + response.writeIntLE(NPL_ADDRESS_SERVER); // peer address + response.writeShortLE(0); // request id + response.writeBytes(content); + content.release(); + + channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress())); + } + + private static final short MAIN_NAV_DATA = 0; + private static final short ADDITIONAL_NAV_DATA = 2; + + private void decodeData(ByteBuf buf, Position position) { + + short itemType; + short itemIndex; + + itemType = buf.readUnsignedByte(); + itemIndex = buf.readUnsignedByte(); + if (itemType == MAIN_NAV_DATA && (itemIndex == 0 || itemIndex == 1)) { + + position.setTime(new Date(buf.readUnsignedIntLE() * 1000)); + position.setLongitude(buf.readIntLE() / 10000000.0); + position.setLatitude(buf.readIntLE() / 10000000.0); + + short flags = buf.readUnsignedByte(); + position.setValid(BitUtil.check(flags, 7)); + if (BitUtil.check(flags, 1)) { + position.set(Position.KEY_ALARM, Position.ALARM_GENERAL); + } + + position.set(Position.KEY_BATTERY, buf.readUnsignedByte() * 20); + position.set(Position.KEY_OBD_SPEED, buf.readUnsignedShortLE()); + position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE())); + position.setCourse(buf.readUnsignedShortLE()); + + position.set(Position.KEY_ODOMETER, buf.readUnsignedShortLE()); + position.setAltitude(buf.readShortLE()); + position.set(Position.KEY_SATELLITES, buf.readUnsignedByte()); + position.set(Position.KEY_PDOP, buf.readUnsignedByte()); + } + + itemType = buf.readUnsignedByte(); + itemIndex = buf.readUnsignedByte(); + if (itemType == ADDITIONAL_NAV_DATA && itemIndex == 0) { + + position.set(Position.KEY_BATTERY_LEVEL, Math.max((buf.readUnsignedShortLE() - 3600) / 6, 100)); + position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShortLE()); + position.set(Position.PREFIX_ADC + 3, buf.readUnsignedShortLE()); + position.set(Position.PREFIX_ADC + 4, buf.readUnsignedShortLE()); + + buf.readUnsignedByte(); // inputs + buf.readUnsignedByte(); // outputs + buf.readUnsignedShortLE(); // in1 count + buf.readUnsignedShortLE(); // in2 count + buf.readUnsignedShortLE(); // in3 count + buf.readUnsignedShortLE(); // in4 count + buf.readUnsignedIntLE(); // track length + + position.set(Position.KEY_ANTENNA, buf.readUnsignedByte()); + position.set(Position.KEY_GPS, buf.readUnsignedByte()); + position.set(Position.KEY_ACCELERATION, buf.readUnsignedByte()); + position.set(Position.KEY_POWER, buf.readUnsignedByte() * 200); + } + } + + @Override + protected Object decode( + Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { + + ByteBuf buf = (ByteBuf) msg; + + DeviceSession deviceSession = getDeviceSession(channel, remoteAddress); + + buf.skipBytes(2); // signature + buf.readUnsignedShortLE(); // length + buf.readUnsignedShortLE(); // connection flags + buf.readUnsignedShortLE(); // checksum + buf.readUnsignedByte(); // type + buf.readUnsignedIntLE(); // address + buf.readUnsignedShortLE(); // identification + + int serviceId = buf.readUnsignedShortLE(); + int serviceType = buf.readUnsignedShortLE(); + buf.readUnsignedShortLE(); // request flags + long requestId = buf.readUnsignedIntLE(); + + if (deviceSession == null && serviceId == NPH_SRV_GENERIC_CONTROLS && serviceType == NPH_SGC_CONN_REQUEST) { + + buf.readUnsignedShortLE(); // version major + buf.readUnsignedShortLE(); // version minor + buf.readUnsignedShortLE(); // connection flags + + int deviceId = buf.readUnsignedShortLE(); + Position position = new Position(getProtocolName()); + deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(deviceId)); + position.setDeviceId(deviceSession.getDeviceId()); + + if (channel != null) { + sendResponse(channel, serviceId, requestId); + } + + position.set(Position.KEY_RESULT, String.valueOf(NPH_SGC_RESULT)); + position.setTime(new Date()); + getLastLocation(position, new Date()); + position.setValid(false); + + return position; + + } + + if (serviceId == NPH_SRV_NAVDATA) { + + deviceSession = getDeviceSession(channel, remoteAddress); + if (deviceSession == null) { + return null; + } + + Position position = new Position(getProtocolName()); + position.setDeviceId(deviceSession.getDeviceId()); + + if (channel != null) { + sendResponse(channel, serviceId, requestId); + } + + decodeData(buf, position); + + return position; + } + + return null; + } + +} |