From 3860e965c9feede1ac876261a47370b44181b5d7 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton@traccar.org>
Date: Sat, 4 Nov 2023 07:51:14 -0700
Subject: Support Dragino gateway protocol

---
 .../java/org/traccar/protocol/DraginoProtocol.java | 42 ++++++++++++
 .../traccar/protocol/DraginoProtocolDecoder.java   | 78 ++++++++++++++++++++++
 2 files changed, 120 insertions(+)
 create mode 100644 src/main/java/org/traccar/protocol/DraginoProtocol.java
 create mode 100644 src/main/java/org/traccar/protocol/DraginoProtocolDecoder.java

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

diff --git a/src/main/java/org/traccar/protocol/DraginoProtocol.java b/src/main/java/org/traccar/protocol/DraginoProtocol.java
new file mode 100644
index 000000000..d33efe2ad
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/DraginoProtocol.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2023 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.http.HttpObjectAggregator;
+import io.netty.handler.codec.http.HttpRequestDecoder;
+import io.netty.handler.codec.http.HttpResponseEncoder;
+import jakarta.inject.Inject;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.config.Config;
+
+public class DraginoProtocol extends BaseProtocol {
+
+    @Inject
+    public DraginoProtocol(Config config) {
+        addServer(new TrackerServer(config, getName(), false) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline, Config config) {
+                pipeline.addLast(new HttpResponseEncoder());
+                pipeline.addLast(new HttpRequestDecoder());
+                pipeline.addLast(new HttpObjectAggregator(65535));
+                pipeline.addLast(new DraginoProtocolDecoder(DraginoProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/DraginoProtocolDecoder.java b/src/main/java/org/traccar/protocol/DraginoProtocolDecoder.java
new file mode 100644
index 000000000..5f576d723
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/DraginoProtocolDecoder.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2023 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 io.netty.handler.codec.http.FullHttpRequest;
+import io.netty.handler.codec.http.HttpResponseStatus;
+import jakarta.json.Json;
+import jakarta.json.JsonObject;
+import org.traccar.BaseHttpProtocolDecoder;
+import org.traccar.Protocol;
+import org.traccar.helper.DateUtil;
+import org.traccar.model.Position;
+import org.traccar.session.DeviceSession;
+
+import java.io.StringReader;
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+
+public class DraginoProtocolDecoder extends BaseHttpProtocolDecoder {
+
+    public DraginoProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        FullHttpRequest request = (FullHttpRequest) msg;
+        String content = request.content().toString(StandardCharsets.UTF_8);
+        JsonObject json = Json.createReader(new StringReader(content)).readObject();
+
+        String deviceId = json.getJsonObject("end_device_ids").getString("device_id");
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, deviceId);
+        if (deviceSession == null) {
+            sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
+            return null;
+        }
+
+        JsonObject message = json.getJsonObject("uplink_message");
+        JsonObject decoded = message.getJsonObject("decoded_payload");
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(DateUtil.parseDate(message.getString("received_at")));
+
+        position.setValid(true);
+        position.setLatitude(decoded.getJsonNumber("Latitude").doubleValue());
+        position.setLongitude(decoded.getJsonNumber("Longitude").doubleValue());
+
+        position.set("humidity", decoded.getJsonNumber("Hum").doubleValue());
+        position.set(Position.KEY_BATTERY, decoded.getJsonNumber("BatV").doubleValue());
+        position.set(Position.PREFIX_TEMP + 1, decoded.getJsonNumber("Tem").doubleValue());
+
+        if (Boolean.parseBoolean(decoded.getString("ALARM_status"))) {
+            position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+        }
+
+        sendResponse(channel, HttpResponseStatus.OK);
+        return position;
+    }
+
+}
-- 
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