From 0e2a2b1b6ba851d599c9c8f53b3775eb15378b7c Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Sat, 21 Sep 2019 11:29:05 -0700
Subject: Implement PT215 protocol

---
 .../org/traccar/protocol/Pt215ProtocolDecoder.java | 118 +++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 src/main/java/org/traccar/protocol/Pt215ProtocolDecoder.java

(limited to 'src/main/java/org/traccar/protocol/Pt215ProtocolDecoder.java')

diff --git a/src/main/java/org/traccar/protocol/Pt215ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Pt215ProtocolDecoder.java
new file mode 100644
index 000000000..48ce7dede
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Pt215ProtocolDecoder.java
@@ -0,0 +1,118 @@
+/*
+ * 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.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+
+public class Pt215ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Pt215ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_LOGIN = 0x01;
+    public static final int MSG_HEARTBEAT = 0x08;
+    public static final int MSG_GPS_REALTIME = 0x10;
+    public static final int MSG_GPS_OFFLINE = 0x11;
+    public static final int MSG_STATUS = 0x13;
+
+    private void sendResponse(
+            Channel channel, SocketAddress remoteAddress, int type, ByteBuf content) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeByte('X');
+            response.writeByte('X');
+            response.writeByte(content != null ? 1 + content.readableBytes() : 1);
+            response.writeByte(type);
+            if (content != null) {
+                response.writeBytes(content);
+                content.release();
+            }
+            response.writeByte('\r');
+            response.writeByte('\n');
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        buf.readUnsignedByte(); // length
+        int type = buf.readUnsignedByte();
+
+        if (type == MSG_LOGIN) {
+
+            getDeviceSession(channel, remoteAddress, ByteBufUtil.hexDump(buf.readSlice(8)).substring(1));
+            sendResponse(channel, remoteAddress, type, null);
+
+        } else if (type == MSG_GPS_OFFLINE || type == MSG_GPS_REALTIME) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            sendResponse(channel, remoteAddress, type, buf.retainedSlice(buf.readerIndex(), 6));
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                    .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+            position.setTime(dateBuilder.getDate());
+
+            double latitude = buf.readUnsignedInt() / 60.0 / 30000.0;
+            double longitude = buf.readUnsignedInt() / 60.0 / 30000.0;
+
+            int flags = buf.readUnsignedShort();
+            position.setCourse(BitUtil.to(flags, 10));
+            position.setValid(BitUtil.check(flags, 12));
+
+            if (!BitUtil.check(flags, 10)) {
+                latitude = -latitude;
+            }
+            if (BitUtil.check(flags, 11)) {
+                longitude = -longitude;
+            }
+
+            position.setLatitude(latitude);
+            position.setLongitude(longitude);
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
-- 
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