diff options
Diffstat (limited to 'src/main/java/org/traccar/protocol/BceProtocolDecoder.java')
| -rw-r--r-- | src/main/java/org/traccar/protocol/BceProtocolDecoder.java | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/BceProtocolDecoder.java b/src/main/java/org/traccar/protocol/BceProtocolDecoder.java new file mode 100644 index 000000000..ed810bebb --- /dev/null +++ b/src/main/java/org/traccar/protocol/BceProtocolDecoder.java @@ -0,0 +1,175 @@ +/* + * Copyright 2015 - 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.BitUtil; +import org.traccar.helper.UnitsConverter; +import org.traccar.model.CellTower; +import org.traccar.model.Network; +import org.traccar.model.Position; + +import java.net.SocketAddress; +import java.util.Date; +import java.util.LinkedList; +import java.util.List; + +public class BceProtocolDecoder extends BaseProtocolDecoder { + + public BceProtocolDecoder(Protocol protocol) { + super(protocol); + } + + private static final int DATA_TYPE = 7; + + public static final int MSG_ASYNC_STACK = 0xA5; + public static final int MSG_STACK_COFIRM = 0x19; + public static final int MSG_TIME_TRIGGERED = 0xA0; + public static final int MSG_OUTPUT_CONTROL = 0x41; + public static final int MSG_OUTPUT_CONTROL_ACK = 0xC1; + + @Override + protected Object decode( + Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { + + ByteBuf buf = (ByteBuf) msg; + + String imei = String.format("%015d", buf.readLongLE()); + DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei); + if (deviceSession == null) { + return null; + } + + List<Position> positions = new LinkedList<>(); + + while (buf.readableBytes() > 1) { + + int dataEnd = buf.readUnsignedShortLE() + buf.readerIndex(); + int type = buf.readUnsignedByte(); + + if (type != MSG_ASYNC_STACK && type != MSG_TIME_TRIGGERED) { + return null; + } + + int confirmKey = buf.readUnsignedByte() & 0x7F; + + while (buf.readerIndex() < dataEnd) { + + Position position = new Position(getProtocolName()); + position.setDeviceId(deviceSession.getDeviceId()); + + int structEnd = buf.readUnsignedByte() + buf.readerIndex(); + + long time = buf.readUnsignedIntLE(); + if ((time & 0x0f) == DATA_TYPE) { + + time = time >> 4 << 1; + time += 0x47798280; // 01/01/2008 + position.setTime(new Date(time * 1000)); + + // Read masks + int mask; + List<Integer> masks = new LinkedList<>(); + do { + mask = buf.readUnsignedShortLE(); + masks.add(mask); + } while (BitUtil.check(mask, 15)); + + mask = masks.get(0); + + if (BitUtil.check(mask, 0)) { + position.setValid(true); + position.setLongitude(buf.readFloatLE()); + position.setLatitude(buf.readFloatLE()); + position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte())); + + int status = buf.readUnsignedByte(); + position.set(Position.KEY_SATELLITES, BitUtil.to(status, 4)); + position.set(Position.KEY_HDOP, BitUtil.from(status, 4)); + + position.setCourse(buf.readUnsignedByte() * 2); + position.setAltitude(buf.readUnsignedShortLE()); + + position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE()); + } + + if (BitUtil.check(mask, 1)) { + position.set(Position.KEY_INPUT, buf.readUnsignedShortLE()); + } + + for (int i = 1; i <= 8; i++) { + if (BitUtil.check(mask, i + 1)) { + position.set(Position.PREFIX_ADC + i, buf.readUnsignedShortLE()); + } + } + + if (BitUtil.check(mask, 10)) { + buf.skipBytes(4); + } + if (BitUtil.check(mask, 11)) { + buf.skipBytes(4); + } + if (BitUtil.check(mask, 12)) { + buf.skipBytes(2); + } + if (BitUtil.check(mask, 13)) { + buf.skipBytes(2); + } + + if (BitUtil.check(mask, 14)) { + position.setNetwork(new Network(CellTower.from( + buf.readUnsignedShortLE(), buf.readUnsignedByte(), + buf.readUnsignedShortLE(), buf.readUnsignedShortLE(), + buf.readUnsignedByte()))); + buf.readUnsignedByte(); + } + + if (BitUtil.check(mask, 0)) { + positions.add(position); + } + } + + buf.readerIndex(structEnd); + } + + // Send response + if (type == MSG_ASYNC_STACK && channel != null) { + ByteBuf response = Unpooled.buffer(8 + 2 + 2 + 1); + response.writeLongLE(Long.parseLong(imei)); + response.writeShortLE(2); + response.writeByte(MSG_STACK_COFIRM); + response.writeByte(confirmKey); + + int checksum = 0; + for (int i = 0; i < response.writerIndex(); i++) { + checksum += response.getUnsignedByte(i); + } + response.writeByte(checksum); + + channel.writeAndFlush(new NetworkMessage(response, remoteAddress)); + } + } + + return positions; + } + +} |