1 files changed, 140 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/Gps056ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gps056ProtocolDecoder.java
new file mode 100644
index 000000000..0ba79bb51
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gps056ProtocolDecoder.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright 2017 - 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.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+
+public class Gps056ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Gps056ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static void sendResponse(Channel channel, String type, String imei, ByteBuf content) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            String header = "*" + type + imei;
+            response.writeBytes(header.getBytes(StandardCharsets.US_ASCII));
+            if (content != null) {
+                response.writeBytes(content);
+            }
+            response.writeByte('#');
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    private static double decodeCoordinate(ByteBuf buf) {
+        double degrees = buf.getUnsignedShort(buf.readerIndex()) / 100;
+        double minutes = buf.readUnsignedShort() % 100 + buf.readUnsignedShort() * 0.0001;
+        degrees += minutes / 60;
+        byte hemisphere = buf.readByte();
+        if (hemisphere == 'S' || hemisphere == 'W') {
+            degrees = -degrees;
+        }
+        return degrees;
+    }
+
+    private static void decodeStatus(ByteBuf buf, Position position) {
+
+        position.set(Position.KEY_INPUT, buf.readUnsignedByte());
+        position.set(Position.KEY_OUTPUT, buf.readUnsignedByte());
+
+        position.set(Position.PREFIX_ADC + 1, buf.readShortLE() * 5.06); // mV
+
+        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+        position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        buf.skipBytes(2); // length
+
+        String type = buf.readSlice(7).toString(StandardCharsets.US_ASCII);
+        String imei = buf.readSlice(15).toString(StandardCharsets.US_ASCII);
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (type.startsWith("LOGN")) {
+
+            ByteBuf content = Unpooled.copiedBuffer("1", StandardCharsets.US_ASCII);
+            try {
+                sendResponse(channel, "LGSA" + type.substring(4), imei, content);
+            } finally {
+                content.release();
+            }
+
+        } else if (type.startsWith("GPSL")) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDateReverse(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                    .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+
+            position.setValid(true);
+            position.setTime(dateBuilder.getDate());
+            position.setLatitude(decodeCoordinate(buf));
+            position.setLongitude(decodeCoordinate(buf));
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+            position.setCourse(buf.readUnsignedShort());
+
+            decodeStatus(buf, position);
+
+            sendResponse(channel, "GPSA" + type.substring(4), imei, buf.readSlice(2));
+
+            return position;
+
+        } else if (type.startsWith("SYNC")) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            decodeStatus(buf, position);
+
+            sendResponse(channel, "SYSA" + type.substring(4), imei, null);
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}