From a1a58cc9ee8c1538aad4f40709bd889b7912a9e6 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Sat, 18 Apr 2015 18:17:54 +1200
Subject: Implement Tytan protocol

---
 src/org/traccar/protocol/TytanProtocolDecoder.java | 121 +++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 src/org/traccar/protocol/TytanProtocolDecoder.java

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

diff --git a/src/org/traccar/protocol/TytanProtocolDecoder.java b/src/org/traccar/protocol/TytanProtocolDecoder.java
new file mode 100644
index 000000000..5b3772d31
--- /dev/null
+++ b/src/org/traccar/protocol/TytanProtocolDecoder.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * 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 java.net.SocketAddress;
+import java.nio.charset.Charset;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Properties;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.database.DataManager;
+import org.traccar.helper.Log;
+import org.traccar.model.ExtendedInfoFormatter;
+import org.traccar.model.Position;
+
+public class TytanProtocolDecoder extends BaseProtocolDecoder {
+
+    public TytanProtocolDecoder(DataManager dataManager, String protocol, Properties properties) {
+        super(dataManager, protocol, properties);
+    }
+
+    private static final int MSG_HEARTBEAT = 0x1A;
+    private static final int MSG_DATA = 0x10;
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, SocketAddress remoteAddress, Object msg)
+            throws Exception {
+
+        ChannelBuffer buf = (ChannelBuffer) msg;
+        
+        buf.readUnsignedByte(); // protocol
+        int index = buf.readUnsignedByte() >> 3;
+        
+        if (channel != null) {
+            ChannelBuffer response = ChannelBuffers.copiedBuffer(
+                    "^" + index, Charset.defaultCharset());
+            channel.write(response, remoteAddress);
+        }
+        
+        String id = String.valueOf(buf.readUnsignedInt());
+        long deviceId;
+        try {
+            deviceId = getDataManager().getDeviceByImei(id).getId();
+        } catch(Exception error) {
+            Log.warning("Unknown device - " + id);
+            return null;
+        }
+        
+        List<Position> positions = new LinkedList<Position>();
+        
+        while (buf.readable()) {
+            
+            Position position = new Position();
+            ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter(getProtocol());
+            position.setDeviceId(deviceId);
+            
+            int end = buf.readerIndex() + buf.readUnsignedByte();
+            
+            position.setTime(new Date(buf.readUnsignedInt() * 1000));
+            
+            int flags = buf.readUnsignedByte();
+            extendedInfo.set("gps", flags >> 5);
+            extendedInfo.set("gsm", flags & 0x07);
+            position.setValid(((flags & 0x08) != 0) ^ ((flags & 0x10) != 0));
+            
+            // Latitude
+            double lat = buf.readUnsignedMedium();
+            lat = lat * -180 / 16777216 + 90;
+            position.setLatitude(lat);
+            
+            // Longitude
+            double lon = buf.readUnsignedMedium();
+            lon = lon * 360 / 16777216 - 180;
+            position.setLongitude(lon);
+            
+            // Altitude
+            position.setAltitude(0.0);
+            
+            // Course
+            int course = (buf.readUnsignedByte() >> 5) * 45;
+            course = (course + 180) % 360;
+            position.setCourse((double) course);
+            
+            // Speed
+            int speed = buf.readUnsignedByte();
+            if (speed >= 250) {
+                position.setSpeed(0.0);
+            } else {
+                position.setSpeed(speed * 0.539957);
+            }
+            
+            buf.skipBytes(end - buf.readerIndex());
+            
+            position.setExtendedInfo(extendedInfo.toString());
+            positions.add(position);
+        }
+        
+        return positions;
+    }
+
+}
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