From 9b90538fc856041e14c12dd4fabbb108cd7858df Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Mon, 26 Oct 2020 23:37:13 -0700
Subject: Implement Net device protocol

---
 .../java/org/traccar/protocol/NetProtocol.java     | 39 +++++++++
 .../org/traccar/protocol/NetProtocolDecoder.java   | 92 ++++++++++++++++++++++
 2 files changed, 131 insertions(+)
 create mode 100644 src/main/java/org/traccar/protocol/NetProtocol.java
 create mode 100644 src/main/java/org/traccar/protocol/NetProtocolDecoder.java

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

diff --git a/src/main/java/org/traccar/protocol/NetProtocol.java b/src/main/java/org/traccar/protocol/NetProtocol.java
new file mode 100644
index 000000000..c114d19fc
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NetProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * 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.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class NetProtocol extends BaseProtocol {
+
+    public NetProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '!'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new NetProtocolDecoder(NetProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NetProtocolDecoder.java b/src/main/java/org/traccar/protocol/NetProtocolDecoder.java
new file mode 100644
index 000000000..2117a2cc6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NetProtocolDecoder.java
@@ -0,0 +1,92 @@
+/*
+ * 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.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class NetProtocolDecoder extends BaseProtocolDecoder {
+
+    public NetProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("@L")
+            .number("ddd")
+            .number("(d{15})")                   // imei
+            .number("xx")
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .number("(x)")                       // flags
+            .number("(dd)(dd)(dddd)")            // latitude
+            .number("(ddd)(dd)(dddd)")           // longitude
+            .number("(xx)")                      // status
+            .number("(x{4})")                    // speed
+            .number("(x{6})")                    // odometer
+            .number("(xxx)")                     // course
+            .number("(xxx)")                     // alarm
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        int flags = parser.nextHexInt();
+
+        position.setValid(BitUtil.check(flags, 3));
+        int hemisphereLatitude = BitUtil.check(flags, 1) ? -1 : 1;
+        int hemisphereLongitude = BitUtil.check(flags, 0) ? -1 : 1;
+
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_MIN_MIN) * hemisphereLatitude);
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_MIN_MIN) * hemisphereLongitude);
+
+        position.set(Position.KEY_STATUS, parser.nextHexInt());
+        position.setSpeed(parser.nextHexInt() * 0.01);
+        position.set(Position.KEY_ODOMETER, parser.nextHexInt());
+        position.setCourse(parser.nextHexInt());
+
+        parser.nextHexInt(); // alarm
+
+        return position;
+    }
+
+}
-- 
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