diff options
Diffstat (limited to 'src/main/java/org/traccar/protocol/SnapperProtocolDecoder.java')
| -rw-r--r-- | src/main/java/org/traccar/protocol/SnapperProtocolDecoder.java | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/SnapperProtocolDecoder.java b/src/main/java/org/traccar/protocol/SnapperProtocolDecoder.java new file mode 100644 index 000000000..3119e347e --- /dev/null +++ b/src/main/java/org/traccar/protocol/SnapperProtocolDecoder.java @@ -0,0 +1,180 @@ +/* + * Copyright 2024 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 jakarta.json.Json; +import jakarta.json.JsonObject; +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.model.Position; +import org.traccar.session.DeviceSession; + +import java.io.StringReader; +import java.net.SocketAddress; +import java.nio.ByteBuffer; +import java.nio.charset.StandardCharsets; +import java.text.DateFormat; +import java.text.SimpleDateFormat; +import java.util.TimeZone; + +public class SnapperProtocolDecoder extends BaseProtocolDecoder { + + public SnapperProtocolDecoder(Protocol protocol) { + super(protocol); + } + + public static final int MSG_HELLO = 0x01; + public static final int MSG_SENDING_START = 0x02; + public static final int MSG_SENDING_FINISH = 0x03; + public static final int MSG_SEND_EVENTS = 0x21; + public static final int MSG_SEND_TECH_INFO = 0x23; + public static final int MSG_UPDATE_CMS_NUM = 0x24; + public static final int MSG_SEND_SYSTEM_INFO = 0x26; + public static final int MSG_SEND_USER_PHONE_NUMBERS = 0x31; + public static final int MSG_SEND_GPS_DATA = 0x32; + public static final int MSG_SEND_LBS_DATA = 0x33; + public static final int MSG_SEND_SYSTEM_STATUS = 0x34; + public static final int MSG_SEND_TRANSIT_SETTINGS = 0x35; + public static final int MSG_GET_SETTINGS = 0x36; + public static final int MSG_SEND_CONCATENATED_PACKET = 0x37; + public static final int MSG_SEND_DEBUG_INFO = 0x38; + + private void sendResponse( + Channel channel, SocketAddress remoteAddress, int index, int type, String answer) { + + if (channel != null) { + ByteBuf response = Unpooled.buffer(); + response.writeByte('K'); + response.writeByte(3); // protocol version + response.writeIntLE(0); // reserved + response.writeIntLE(0); // reserved + response.writeShortLE(0); // encryption + response.writeIntLE(answer.length()); + response.writeShortLE(index); + response.writeByte(Checksum.sum(ByteBuffer.wrap(answer.getBytes(StandardCharsets.US_ASCII)))); + response.writeByte(type); + response.writeCharSequence(answer, StandardCharsets.US_ASCII); + channel.writeAndFlush(new NetworkMessage(response, remoteAddress)); + } + } + + @Override + protected Object decode( + Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { + + ByteBuf buf = (ByteBuf) msg; + + buf.readUnsignedByte(); // header + buf.readUnsignedByte(); // protocol version + buf.readUnsignedIntLE(); // system bonus identifier + + String serialNumber = String.valueOf(buf.readUnsignedIntLE()); + DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, serialNumber); + if (deviceSession == null) { + return null; + } + + buf.readUnsignedShortLE(); // encryption + buf.readUnsignedIntLE(); // length + buf.readUnsignedByte(); // flags + buf.readUnsignedMediumLE(); // reserved + int index = buf.readUnsignedShortLE(); + buf.readUnsignedByte(); // checksum + int type = buf.readUnsignedShortLE(); + + if (type == MSG_HELLO) { + sendResponse(channel, remoteAddress, index, type, "hello"); + } else { + sendResponse(channel, remoteAddress, index, type, "OK"); + } + + Position position = new Position(getProtocolName()); + position.setDeviceId(deviceSession.getDeviceId()); + + if (type == MSG_SEND_EVENTS) { + + position.set(Position.KEY_EVENT, buf.readUnsignedByte()); + buf.readUnsignedByte(); // info 1 + buf.readUnsignedByte(); // info 2 + getLastLocation(position, null); // TODO read timestamp + return position; + + } else if (type == MSG_SEND_TECH_INFO) { + + buf.readUnsignedByte(); // index + int subtype = buf.readUnsignedByte(); + switch (subtype) { + case 0x00: + position.set(Position.KEY_POWER, buf.readUnsignedByte() * 0.1); + position.set(Position.KEY_DEVICE_TEMP, buf.readByte()); + position.set(Position.KEY_RSSI, buf.readUnsignedByte()); + break; + case 0x01: + position.set("interiorTemp", buf.readByte()); + position.set("engineTemp", buf.readByte()); + default: + break; + } + getLastLocation(position, null); + return position; + + } else if (type == MSG_SEND_GPS_DATA) { + + String content = buf.readCharSequence(buf.readableBytes(), StandardCharsets.US_ASCII).toString(); + JsonObject json = Json.createReader(new StringReader(content)).readObject(); + + //{"f":"DE","t":"092304.01","d":"110813","la":"5117.6370", + // "lo":"01655.3959","a":"00166.6","s":"","c":"","sv":"08","p":"01.6"} + + DateFormat dateFormat = new SimpleDateFormat("ddMMyyHHmmss.SS"); + dateFormat.setTimeZone(TimeZone.getTimeZone("UTC")); + position.setTime(dateFormat.parse(json.getString("d") + json.getString("t"))); + + String lat = json.getString("la"); + position.setLatitude(Integer.parseInt(lat.substring(0, 2)) + Double.parseDouble(lat.substring(2)) / 60); + String lon = json.getString("lo"); + position.setLongitude(Integer.parseInt(lon.substring(0, 3)) + Double.parseDouble(lon.substring(3)) / 60); + + int flags = Integer.parseInt(json.getString("f")); + position.setValid(BitUtil.check(flags, 1)); + if (!BitUtil.check(flags, 6)) { + position.setLatitude(-position.getLatitude()); + } + if (!BitUtil.check(flags, 7)) { + position.setLongitude(-position.getLongitude()); + } + + position.setAltitude(Double.parseDouble(json.getString("a"))); + position.setSpeed(Double.parseDouble(json.getString("s"))); + position.setCourse(Double.parseDouble(json.getString("c"))); + + position.set(Position.KEY_SATELLITES, Integer.parseInt(json.getString("sv"))); + + return position; + + } + + + return null; + } + +} |