From 08cc944644cee5ce745a9faae0866b206c575407 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Sat, 15 Jul 2017 14:01:52 +1200
Subject: Implement binary GL200 protocol

---
 .../protocol/Gl200BinaryProtocolDecoder.java       | 103 +++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 src/org/traccar/protocol/Gl200BinaryProtocolDecoder.java

(limited to 'src/org/traccar/protocol/Gl200BinaryProtocolDecoder.java')

diff --git a/src/org/traccar/protocol/Gl200BinaryProtocolDecoder.java b/src/org/traccar/protocol/Gl200BinaryProtocolDecoder.java
new file mode 100644
index 000000000..cb0417528
--- /dev/null
+++ b/src/org/traccar/protocol/Gl200BinaryProtocolDecoder.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2017 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 org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.helper.DateBuilder;
+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.nio.charset.StandardCharsets;
+
+public class Gl200BinaryProtocolDecoder extends BaseProtocolDecoder {
+
+    public Gl200BinaryProtocolDecoder(Gl200Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ChannelBuffer buf = (ChannelBuffer) msg;
+
+        String header = buf.readBytes(4).toString(StandardCharsets.US_ASCII);
+
+        if (header.equals("+EVT")) {
+
+            Position position = new Position();
+            position.setProtocol(getProtocolName());
+
+            buf.readUnsignedByte(); // message type
+
+            buf.readUnsignedInt(); // mask
+
+            buf.readUnsignedShort(); // length
+            buf.readUnsignedByte(); // device type
+            buf.readUnsignedShort(); // protocol version
+
+            position.set(Position.KEY_VERSION_FW, String.valueOf(buf.readUnsignedShort()));
+
+            DeviceSession deviceSession = getDeviceSession(
+                    channel, remoteAddress, String.format("%015d", buf.readLong()));
+            if (deviceSession == null) {
+                return null;
+            }
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.set(Position.KEY_BATTERY_LEVEL, buf.readUnsignedByte());
+            position.set(Position.KEY_POWER, buf.readUnsignedShort());
+
+            buf.readUnsignedByte(); // motion status
+
+            position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+            position.set(Position.KEY_INDEX, buf.readUnsignedByte());
+
+            int hdop = buf.readUnsignedByte();
+            position.setValid(hdop > 0);
+            position.set(Position.KEY_HDOP, hdop);
+
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedMedium()));
+            position.setCourse(buf.readUnsignedShort());
+            position.setAltitude(buf.readShort());
+            position.setLongitude(buf.readInt() * 0.000001);
+            position.setLatitude(buf.readInt() * 0.000001);
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDate(buf.readUnsignedShort(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                    .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+            position.setTime(dateBuilder.getDate());
+
+            position.setNetwork(new Network(CellTower.from(
+                    buf.readUnsignedShort(), buf.readUnsignedShort(),
+                    buf.readUnsignedShort(), buf.readUnsignedShort())));
+
+            buf.readUnsignedByte(); // reserved
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
-- 
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