From d25d3810621cda6bb7df2c060e8a7856784e789f Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Sun, 14 Apr 2019 17:53:34 -0700
Subject: Implement Sanul protocol

---
 .../java/org/traccar/protocol/SanulProtocol.java   | 37 +++++++++
 .../org/traccar/protocol/SanulProtocolDecoder.java | 97 ++++++++++++++++++++++
 2 files changed, 134 insertions(+)
 create mode 100644 src/main/java/org/traccar/protocol/SanulProtocol.java
 create mode 100644 src/main/java/org/traccar/protocol/SanulProtocolDecoder.java

(limited to 'src/main')

diff --git a/src/main/java/org/traccar/protocol/SanulProtocol.java b/src/main/java/org/traccar/protocol/SanulProtocol.java
new file mode 100644
index 000000000..3104e9366
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SanulProtocol.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2019 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.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+import java.nio.ByteOrder;
+
+public class SanulProtocol extends BaseProtocol {
+
+    public SanulProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 1024, 3, 2, 0, 0, true));
+                pipeline.addLast(new SanulProtocolDecoder(SanulProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SanulProtocolDecoder.java b/src/main/java/org/traccar/protocol/SanulProtocolDecoder.java
new file mode 100644
index 000000000..bd29828b3
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SanulProtocolDecoder.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2019 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.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+
+public class SanulProtocolDecoder extends BaseProtocolDecoder {
+
+    public static final int MSG_LOGIN = 0;
+    public static final int MSG_LOCATION = 1;
+    public static final int MSG_RESPONSE = 5;
+
+    public SanulProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private void sendResponse(Channel channel, int type) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeByte(0xaa); // header
+            response.writeShortLE(0); // reserved
+            response.writeShortLE(15); // length
+            response.writeByte(1); // edition
+            response.writeShortLE(MSG_RESPONSE);
+            response.writeShortLE(type);
+            response.writeIntLE(0); // command id
+            response.writeByte(0); // status
+            response.writeByte(0); // result length
+            response.writeIntLE(0); // result data ?
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedByte(); // header
+        buf.readUnsignedShortLE(); // reserved
+        buf.readUnsignedShortLE(); // length
+        buf.readUnsignedByte(); // edition
+
+        int type = buf.readUnsignedShortLE();
+
+        buf.readUnsignedIntLE(); // command id
+
+        sendResponse(channel, type);
+
+        if (type == MSG_LOGIN) {
+
+            getDeviceSession(channel, remoteAddress, buf.toString(StandardCharsets.US_ASCII).trim());
+
+        } else if (type == MSG_LOCATION) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
-- 
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