Add Digital Systems DSF22 protocol

3 files changed, 174 insertions, 0 deletions

diff --git a/src/main/java/org/traccar/protocol/Dsf22FrameDecoder.java b/src/main/java/org/traccar/protocol/Dsf22FrameDecoder.java
new file mode 100644
index 000000000..388c97f85
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Dsf22FrameDecoder.java
@@ -0,0 +1,44 @@
+/*
+ * 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.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class Dsf22FrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 21) {
+            return null;
+        }
+
+        int count = buf.getUnsignedByte(buf.readerIndex() + 4);
+
+        int length = 2 + 2 + 1 + count * (4 + 4 + 4 + 1 + 2 + 1);
+
+        if (buf.readableBytes() >= length) {
+            return buf.readRetainedSlice(length);
+        } else {
+            return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Dsf22Protocol.java b/src/main/java/org/traccar/protocol/Dsf22Protocol.java
new file mode 100644
index 000000000..bffc3e419
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Dsf22Protocol.java
@@ -0,0 +1,40 @@
+/*
+ * 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 org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Dsf22Protocol extends BaseProtocol {
+
+    public Dsf22Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new Dsf22FrameDecoder());
+                pipeline.addLast(new Dsf22ProtocolDecoder(Dsf22Protocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new Dsf22ProtocolDecoder(Dsf22Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Dsf22ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Dsf22ProtocolDecoder.java
new file mode 100644
index 000000000..d5a9df7bc
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Dsf22ProtocolDecoder.java
@@ -0,0 +1,90 @@
+/*
+ * 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.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+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.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class Dsf22ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Dsf22ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+
+        String id = ByteBufUtil.hexDump(buf.readSlice(2));
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        List<Position> positions = new LinkedList<>();
+        int count = buf.readUnsignedByte();
+
+        for (int i = 0; i < count; i++) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setValid(true);
+            position.setLatitude(buf.readInt());
+            position.setLongitude(buf.readInt());
+            position.setTime(new Date(946684800000L + buf.readUnsignedInt()));
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+
+            position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedShort() * 0.001);
+
+            int status = buf.readUnsignedByte();
+            position.set(Position.KEY_IGNITION, BitUtil.check(status, 0));
+            position.set(Position.PREFIX_IN + 1, BitUtil.check(status, 1));
+            position.set(Position.PREFIX_OUT + 1, BitUtil.check(status, 4));
+            position.set(Position.KEY_ALARM, BitUtil.check(status, 6) ? Position.ALARM_JAMMING : null);
+            position.set(Position.KEY_STATUS, status);
+
+            positions.add(position);
+
+        }
+
+        if (channel != null) {
+            byte[] response = {0x01};
+            channel.writeAndFlush(new NetworkMessage(Unpooled.wrappedBuffer(response), remoteAddress));
+        }
+
+        return positions;
+    }
+
+}