Implement ThinkRace communication protocol

1 files changed, 106 insertions, 0 deletions

diff --git a/src/org/traccar/protocol/ThinkRaceProtocolDecoder.java b/src/org/traccar/protocol/ThinkRaceProtocolDecoder.java
new file mode 100644
index 000000000..a5a1ef784
--- /dev/null
+++ b/src/org/traccar/protocol/ThinkRaceProtocolDecoder.java
@@ -0,0 +1,106 @@
+/*
+ * 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 org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.helper.BitUtil;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.Charset;
+import java.util.Date;
+
+public class ThinkRaceProtocolDecoder extends BaseProtocolDecoder {
+
+    public ThinkRaceProtocolDecoder(ThinkRaceProtocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_LOGIN = 0x80;
+    public static final int MSG_GPS = 0x90;
+
+    private static double convertCoordinate(long raw, boolean negative) {
+        double result = raw / 1000000;
+        result += (raw % 1000000) * 0.0001 / 60;
+        if (negative) {
+            result = -result;
+        }
+        return result;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ChannelBuffer buf = (ChannelBuffer) msg;
+
+        buf.skipBytes(2); // header
+        ChannelBuffer id = buf.readBytes(12);
+        buf.readUnsignedByte(); // separator
+        int type = buf.readUnsignedByte();
+        buf.readUnsignedShort(); // length
+
+        if (type == MSG_LOGIN) {
+
+            int command = buf.readUnsignedByte(); // 0x00 - heartbeat
+
+            if (command == 0x01) {
+                String imei = buf.toString(buf.readerIndex(), 15, Charset.defaultCharset());
+                if (identify(imei, channel, remoteAddress) && channel != null) {
+                    ChannelBuffer response = ChannelBuffers.dynamicBuffer();
+                    response.writeByte(0x48); response.writeByte(0x52); // header
+                    response.writeBytes(id);
+                    response.writeByte(0x2c); // separator
+                    response.writeByte(type);
+                    response.writeShort(0x0002); // length
+                    response.writeShort(0x8000);
+                    response.writeShort(0x0000); // checksum
+                    channel.write(response);
+                }
+            }
+
+        } else if (hasDeviceId() && type == MSG_GPS) {
+
+            Position position = new Position();
+            position.setProtocol(getProtocolName());
+            position.setDeviceId(getDeviceId());
+
+            position.setTime(new Date(buf.readUnsignedInt() * 1000));
+
+            int flags = buf.readUnsignedByte();
+
+            position.setValid(true);
+            position.setLatitude(convertCoordinate(buf.readUnsignedInt(), !BitUtil.check(flags, 0)));
+            position.setLongitude(convertCoordinate(buf.readUnsignedInt(), !BitUtil.check(flags, 1)));
+
+            position.setSpeed(buf.readUnsignedByte());
+            position.setCourse(buf.readUnsignedByte());
+
+            position.set(Event.KEY_LAC, buf.readUnsignedShort());
+            position.set(Event.KEY_CID, buf.readUnsignedShort());
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}