diff options
Diffstat (limited to 'src/main/java/org/traccar/protocol/KhdProtocolDecoder.java')
| -rw-r--r-- | src/main/java/org/traccar/protocol/KhdProtocolDecoder.java | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/KhdProtocolDecoder.java b/src/main/java/org/traccar/protocol/KhdProtocolDecoder.java new file mode 100644 index 000000000..0dd5b085a --- /dev/null +++ b/src/main/java/org/traccar/protocol/KhdProtocolDecoder.java @@ -0,0 +1,157 @@ +/* + * Copyright 2014 - 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.Unpooled; +import io.netty.channel.Channel; +import org.traccar.BaseProtocolDecoder; +import org.traccar.DeviceSession; +import org.traccar.NetworkMessage; +import org.traccar.Protocol; +import org.traccar.helper.BcdUtil; +import org.traccar.helper.Checksum; +import org.traccar.helper.DateBuilder; +import org.traccar.helper.UnitsConverter; +import org.traccar.model.Position; + +import java.net.SocketAddress; + +public class KhdProtocolDecoder extends BaseProtocolDecoder { + + public KhdProtocolDecoder(Protocol protocol) { + super(protocol); + } + + private String readSerialNumber(ByteBuf buf) { + int b1 = buf.readUnsignedByte(); + int b2 = buf.readUnsignedByte() - 0x80; + int b3 = buf.readUnsignedByte() - 0x80; + int b4 = buf.readUnsignedByte(); + return String.format("%02d%02d%02d%02d", b1, b2, b3, b4); + } + + public static final int MSG_LOGIN = 0xB1; + public static final int MSG_CONFIRMATION = 0x21; + public static final int MSG_ON_DEMAND = 0x81; + public static final int MSG_POSITION_UPLOAD = 0x80; + public static final int MSG_POSITION_REUPLOAD = 0x8E; + public static final int MSG_ALARM = 0x82; + public static final int MSG_ADMIN_NUMBER = 0x83; + public static final int MSG_SEND_TEXT = 0x84; + public static final int MSG_REPLY = 0x85; + public static final int MSG_SMS_ALARM_SWITCH = 0x86; + public static final int MSG_PERIPHERAL = 0xA3; + + @Override + protected Object decode( + Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { + + ByteBuf buf = (ByteBuf) msg; + + buf.skipBytes(2); // header + int type = buf.readUnsignedByte(); + buf.readUnsignedShort(); // size + + if (type == MSG_LOGIN || type == MSG_ADMIN_NUMBER || type == MSG_SEND_TEXT + || type == MSG_SMS_ALARM_SWITCH || type == MSG_POSITION_REUPLOAD) { + + ByteBuf response = Unpooled.buffer(); + response.writeByte(0x29); + response.writeByte(0x29); // header + response.writeByte(MSG_CONFIRMATION); + response.writeShort(5); // size + response.writeByte(buf.getByte(buf.writerIndex() - 2)); + response.writeByte(type); + response.writeByte(buf.writerIndex() > 9 ? buf.getByte(9) : 0); // 10th byte + response.writeByte(Checksum.xor(response.nioBuffer())); + response.writeByte(0x0D); // ending + + if (channel != null) { + channel.writeAndFlush(new NetworkMessage(response, remoteAddress)); + } + + } + + if (type == MSG_ON_DEMAND || type == MSG_POSITION_UPLOAD || type == MSG_POSITION_REUPLOAD + || type == MSG_ALARM || type == MSG_REPLY || type == MSG_PERIPHERAL) { + + Position position = new Position(getProtocolName()); + + DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, readSerialNumber(buf)); + if (deviceSession == null) { + return null; + } + position.setDeviceId(deviceSession.getDeviceId()); + + DateBuilder dateBuilder = new DateBuilder() + .setYear(BcdUtil.readInteger(buf, 2)) + .setMonth(BcdUtil.readInteger(buf, 2)) + .setDay(BcdUtil.readInteger(buf, 2)) + .setHour(BcdUtil.readInteger(buf, 2)) + .setMinute(BcdUtil.readInteger(buf, 2)) + .setSecond(BcdUtil.readInteger(buf, 2)); + position.setTime(dateBuilder.getDate()); + + position.setLatitude(BcdUtil.readCoordinate(buf)); + position.setLongitude(BcdUtil.readCoordinate(buf)); + position.setSpeed(UnitsConverter.knotsFromKph(BcdUtil.readInteger(buf, 4))); + position.setCourse(BcdUtil.readInteger(buf, 4)); + position.setValid((buf.readUnsignedByte() & 0x80) != 0); + + if (type != MSG_ALARM) { + + position.set(Position.KEY_ODOMETER, buf.readUnsignedMedium()); + position.set(Position.KEY_STATUS, buf.readUnsignedInt()); + position.set(Position.KEY_HDOP, buf.readUnsignedByte()); + position.set(Position.KEY_VDOP, buf.readUnsignedByte()); + position.set(Position.KEY_SATELLITES, buf.readUnsignedByte()); + + buf.skipBytes(5); // other location data + + if (type == MSG_PERIPHERAL) { + + buf.readUnsignedShort(); // data length + + int dataType = buf.readUnsignedByte(); + + buf.readUnsignedByte(); // content length + + switch (dataType) { + case 0x01: + position.set(Position.KEY_FUEL_LEVEL, + buf.readUnsignedByte() * 100 + buf.readUnsignedByte()); + break; + case 0x02: + position.set(Position.PREFIX_TEMP + 1, + buf.readUnsignedByte() * 100 + buf.readUnsignedByte()); + break; + default: + break; + } + + } + + } + + return position; + + } + + return null; + } + +} |