From d5a391ccb44bb526417d33f1e11fd2540b28103b Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Sun, 23 May 2021 12:17:10 -0700
Subject: Start R12W protocol implementation

---
 setup/default.xml                                  |  1 +
 .../java/org/traccar/protocol/R12wProtocol.java    | 39 ++++++++++++++
 .../org/traccar/protocol/R12wProtocolDecoder.java  | 62 ++++++++++++++++++++++
 .../traccar/protocol/R12wProtocolDecoderTest.java  | 18 +++++++
 4 files changed, 120 insertions(+)
 create mode 100644 src/main/java/org/traccar/protocol/R12wProtocol.java
 create mode 100644 src/main/java/org/traccar/protocol/R12wProtocolDecoder.java
 create mode 100644 src/test/java/org/traccar/protocol/R12wProtocolDecoderTest.java

diff --git a/setup/default.xml b/setup/default.xml
index a518bff50..4e9e96de8 100644
--- a/setup/default.xml
+++ b/setup/default.xml
@@ -290,5 +290,6 @@
     <entry key='gs100.port'>5223</entry>
     <entry key='mavlink2.port'>5224</entry>
     <entry key='uux.port'>5225</entry>
+    <entry key='r12w.port'>5226</entry>
 
 </properties>
diff --git a/src/main/java/org/traccar/protocol/R12wProtocol.java b/src/main/java/org/traccar/protocol/R12wProtocol.java
new file mode 100644
index 000000000..3726233b4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/R12wProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2021 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.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class R12wProtocol extends BaseProtocol {
+
+    public R12wProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new R12wProtocolDecoder(R12wProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/R12wProtocolDecoder.java b/src/main/java/org/traccar/protocol/R12wProtocolDecoder.java
new file mode 100644
index 000000000..d60318447
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/R12wProtocolDecoder.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2021 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.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+
+import java.net.SocketAddress;
+
+public class R12wProtocolDecoder extends BaseProtocolDecoder {
+
+    public R12wProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private void sendResponse(Channel channel, String type, String id, String data) {
+        if (channel != null) {
+            String sentence = String.format("$HX,%s,%s,%s,#", type, id, data);
+            sentence += String.format(",%02x,\r\n", Checksum.xor(sentence));
+            channel.writeAndFlush(new NetworkMessage(sentence, channel.remoteAddress()));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+        String[] values = sentence.split(",");
+        String type = values[1];
+        String id = values[2];
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (type.equals("0001")) {
+            sendResponse(channel, "1001", id, values[3] + ",OK");
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/R12wProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/R12wProtocolDecoderTest.java
new file mode 100644
index 000000000..acb7277b5
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/R12wProtocolDecoderTest.java
@@ -0,0 +1,18 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class R12wProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        var decoder = new R12wProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "$HX,0001,860721009104316,e92c,933402042499509,55792760080,12345678,01,a8d940a9,#,50,"));
+
+    }
+
+}
-- 
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