1 files changed, 116 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/ThinkRaceProtocolDecoder.java b/src/main/java/org/traccar/protocol/ThinkRaceProtocolDecoder.java
new file mode 100644
index 000000000..0928b25e0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ThinkRaceProtocolDecoder.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2015 - 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.BitUtil;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+
+public class ThinkRaceProtocolDecoder extends BaseProtocolDecoder {
+
+    public ThinkRaceProtocolDecoder(Protocol 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) {
+        long degrees = raw / 1000000;
+        double minutes = (raw % 1000000) * 0.0001;
+        double result = degrees + minutes / 60;
+        if (negative) {
+            result = -result;
+        }
+        return result;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        ByteBuf id = buf.readSlice(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, StandardCharsets.US_ASCII);
+                DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+                if (deviceSession != null && channel != null) {
+                    ByteBuf response = Unpooled.buffer();
+                    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.writeAndFlush(new NetworkMessage(response, remoteAddress));
+                }
+            }
+
+        } else if (type == MSG_GPS) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.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.setNetwork(new Network(
+                    CellTower.fromLacCid(buf.readUnsignedShort(), buf.readUnsignedShort())));
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}