From 36a49a88ea44da16b57e5256dc4c91c2e90a3792 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Sat, 9 Nov 2019 17:47:56 -0800
Subject: Implement Topin protocol

---
 .../org/traccar/protocol/TopinProtocolDecoder.java | 136 +++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 src/main/java/org/traccar/protocol/TopinProtocolDecoder.java

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

diff --git a/src/main/java/org/traccar/protocol/TopinProtocolDecoder.java b/src/main/java/org/traccar/protocol/TopinProtocolDecoder.java
new file mode 100644
index 000000000..9393fbca9
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TopinProtocolDecoder.java
@@ -0,0 +1,136 @@
+/*
+ * Copyright 2019 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.ByteBufUtil;
+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.model.Position;
+
+import java.net.SocketAddress;
+import java.util.TimeZone;
+
+public class TopinProtocolDecoder extends BaseProtocolDecoder {
+
+    public TopinProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_LOGIN = 0x01;
+    public static final int MSG_GPS = 0x10;
+    public static final int MSG_GPS_OFFLINE = 0x11;
+    public static final int MSG_STATUS = 0x13;
+
+    private void sendResponse(Channel channel, ByteBuf content) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeShort(0x7878);
+            response.writeBytes(content);
+            response.writeByte('\r');
+            response.writeByte('\n');
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        int length = buf.readUnsignedByte();
+
+        int type = buf.readUnsignedByte();
+
+        DeviceSession deviceSession;
+        if (type == MSG_LOGIN) {
+            String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
+            deviceSession = getDeviceSession(channel, remoteAddress, imei);
+            ByteBuf content = Unpooled.buffer();
+            content.writeByte(type);
+            content.writeByte(deviceSession != null ? 0x01 : 0x44);
+            sendResponse(channel, content);
+            return null;
+        } else {
+            deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+        }
+
+        if (type == MSG_GPS || type == MSG_GPS_OFFLINE) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            ByteBuf time = buf.slice(buf.readerIndex(), 6);
+
+            Gt06ProtocolDecoder.decodeGps(position, buf, false, TimeZone.getTimeZone("UTC"));
+
+            ByteBuf content = Unpooled.buffer();
+            content.writeByte(0);
+            content.writeByte(type);
+            content.writeBytes(time);
+            sendResponse(channel, content);
+
+            return position;
+
+        } else if (type == MSG_STATUS) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            int battery = buf.readUnsignedByte();
+            int firmware = buf.readUnsignedByte();
+            int timezone = buf.readUnsignedByte();
+            int interval = buf.readUnsignedByte();
+            int signal = 0;
+            if (length >= 7) {
+                signal = buf.readUnsignedByte();
+                position.set(Position.KEY_RSSI, signal);
+            }
+
+            position.set(Position.KEY_BATTERY_LEVEL, battery);
+            position.set(Position.KEY_VERSION_FW, firmware);
+
+            ByteBuf content = Unpooled.buffer();
+            content.writeByte(length);
+            content.writeByte(type);
+            content.writeByte(battery);
+            content.writeByte(firmware);
+            content.writeByte(timezone);
+            content.writeByte(interval);
+            if (length >= 7) {
+                content.writeByte(signal);
+            }
+            sendResponse(channel, content);
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
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