Start R12W protocol implementation

1 files changed, 62 insertions, 0 deletions

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;
+    }
+
+}