From eb4e0be40343a6b0cd91b083ba185729f8aed334 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Sat, 30 May 2020 12:21:12 -0700
Subject: Implement Wireless Links protocol

Devices: STX/Piccolo Plus/ATX2S/TMX/Hybrid/ATX/ATX_II
---
 .../org/traccar/protocol/WliProtocolDecoder.java   | 134 +++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 src/main/java/org/traccar/protocol/WliProtocolDecoder.java

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

diff --git a/src/main/java/org/traccar/protocol/WliProtocolDecoder.java b/src/main/java/org/traccar/protocol/WliProtocolDecoder.java
new file mode 100644
index 000000000..fb3d076c1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/WliProtocolDecoder.java
@@ -0,0 +1,134 @@
+/*
+ * Copyright 2020 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.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+
+public class WliProtocolDecoder extends BaseProtocolDecoder {
+
+    public WliProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedByte(); // header
+        int type = buf.readUnsignedByte();
+
+        if (type == '1') {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.set(Position.KEY_INDEX, buf.readUnsignedShort());
+
+            buf.readUnsignedShort(); // length
+            buf.readUnsignedShort(); // checksum
+            buf.readUnsignedByte(); // application message type
+            buf.readUnsignedByte(); // delimiter
+
+            while (buf.readableBytes() > 1) {
+
+                int fieldNumber = buf.readUnsignedByte();
+
+                buf.readUnsignedByte(); // delimiter
+
+                if (buf.getUnsignedByte(buf.readerIndex()) == 0xFF) {
+
+                    buf.readUnsignedByte(); // binary type indication
+                    int endIndex = buf.readUnsignedShort() + buf.readerIndex();
+
+                    if (fieldNumber == 52) {
+                        position.setValid(true);
+                        buf.readUnsignedByte(); // reason
+                        buf.readUnsignedByte(); // century
+                        DateBuilder dateBuilder = new DateBuilder()
+                                .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                                .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+                        position.setFixTime(dateBuilder.getDate());
+                        position.setLatitude(buf.readInt() / 600000.0);
+                        position.setLongitude(buf.readInt() / 600000.0);
+                        position.setSpeed(buf.readUnsignedShort());
+                        position.setCourse(buf.readUnsignedShort() * 0.1);
+                        position.set(Position.KEY_ODOMETER, UnitsConverter.metersFromFeet(buf.readUnsignedInt()));
+                        position.setAltitude(buf.readInt() * 0.1);
+                    }
+
+                    buf.readerIndex(endIndex);
+
+                } else {
+
+                    int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0);
+                    String value = buf.readCharSequence(
+                            endIndex - buf.readerIndex(), StandardCharsets.US_ASCII).toString();
+
+                    switch (fieldNumber) {
+                        case 246:
+                            String[] values = value.split(",");
+                            position.set(Position.KEY_POWER, Integer.parseInt(values[2]) * 0.01);
+                            position.set(Position.KEY_BATTERY, Integer.parseInt(values[3]) * 0.01);
+                            break;
+                        case 255:
+                            position.setDeviceTime(new Date(Long.parseLong(value) * 1000));
+                            break;
+                        default:
+                            break;
+                    }
+
+                }
+
+                buf.readUnsignedByte(); // delimiter
+
+            }
+
+            if (!position.getValid()) {
+                getLastLocation(position, position.getDeviceTime());
+            }
+
+            return position;
+
+        } else if (type == '2') {
+
+            String id = buf.toString(buf.readerIndex(), buf.readableBytes() - 1, StandardCharsets.US_ASCII);
+            getDeviceSession(channel, remoteAddress, id);
+            return null;
+
+        }
+
+        return null;
+    }
+
+}
-- 
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