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authorAnton Tananaev <anton.tananaev@gmail.com>2021-10-31 15:44:55 -0700
committerAnton Tananaev <anton.tananaev@gmail.com>2021-10-31 15:44:55 -0700
commitfb60f434eccef5e4d0f9e3e9eca75ca73d01d2bd (patch)
tree26718fda05c3745452d5a12257cbba4be8e01694 /src/main/java/org/traccar/protocol/DualcamProtocolDecoder.java
parentde44291fc5f23703176d8c6b872420319357fd84 (diff)
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Support Teltonika Dualcam protocol
Diffstat (limited to 'src/main/java/org/traccar/protocol/DualcamProtocolDecoder.java')
-rw-r--r--src/main/java/org/traccar/protocol/DualcamProtocolDecoder.java124
1 files changed, 124 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/DualcamProtocolDecoder.java b/src/main/java/org/traccar/protocol/DualcamProtocolDecoder.java
new file mode 100644
index 000000000..4647e287c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/DualcamProtocolDecoder.java
@@ -0,0 +1,124 @@
+/*
+ * 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.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+
+public class DualcamProtocolDecoder extends BaseProtocolDecoder {
+
+ public DualcamProtocolDecoder(Protocol protocol) {
+ super(protocol);
+ }
+
+ public static final int MSG_INIT = 0;
+ public static final int MSG_START = 1;
+ public static final int MSG_RESUME = 2;
+ public static final int MSG_SYNC = 3;
+ public static final int MSG_DATA = 4;
+ public static final int MSG_COMPLETE = 5;
+ public static final int MSG_FILE_REQUEST = 8;
+ public static final int MSG_INIT_REQUEST = 9;
+
+ private String uniqueId;
+ private int packetCount;
+ private int currentPacket;
+ private ByteBuf photo;
+
+ @Override
+ protected Object decode(
+ Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+ ByteBuf buf = (ByteBuf) msg;
+
+ int type = buf.readUnsignedShort();
+
+ switch (type) {
+ case MSG_INIT:
+ buf.readUnsignedShort(); // protocol id
+ uniqueId = String.valueOf(buf.readLong());
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, uniqueId);
+ long settings = buf.readUnsignedInt();
+ if (channel != null && deviceSession != null) {
+ if (BitUtil.check(settings, 26)) {
+ ByteBuf response = Unpooled.buffer();
+ response.writeShort(MSG_FILE_REQUEST);
+ String file = "%photof";
+ response.writeShort(file.length());
+ response.writeCharSequence(file, StandardCharsets.US_ASCII);
+ channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+ } else {
+ ByteBuf response = Unpooled.buffer();
+ response.writeShort(MSG_COMPLETE);
+ channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+ }
+ }
+ break;
+ case MSG_START:
+ buf.readUnsignedShort(); // length
+ packetCount = buf.readInt();
+ currentPacket = 1;
+ photo = Unpooled.buffer();
+ if (channel != null) {
+ ByteBuf response = Unpooled.buffer();
+ response.writeShort(MSG_RESUME);
+ response.writeShort(4);
+ response.writeInt(currentPacket);
+ channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+ }
+ break;
+ case MSG_DATA:
+ buf.readUnsignedShort(); // length
+ photo.writeBytes(buf, buf.readableBytes());
+ if (currentPacket == packetCount) {
+ deviceSession = getDeviceSession(channel, remoteAddress);
+ Position position = new Position(getProtocolName());
+ position.setDeviceId(deviceSession.getDeviceId());
+ getLastLocation(position, null);
+ try {
+ position.set(Position.KEY_IMAGE, Context.getMediaManager().writeFile(uniqueId, photo, "jpg"));
+ } finally {
+ photo.release();
+ photo = null;
+ }
+ if (channel != null) {
+ ByteBuf response = Unpooled.buffer();
+ response.writeShort(MSG_INIT_REQUEST);
+ channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+ }
+ } else {
+ currentPacket += 1;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return null;
+ }
+
+}