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-rw-r--r--src/org/traccar/protocol/DmtProtocol.java46
-rw-r--r--src/org/traccar/protocol/DmtProtocolDecoder.java147
2 files changed, 193 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/DmtProtocol.java b/src/org/traccar/protocol/DmtProtocol.java
new file mode 100644
index 000000000..18bb1524a
--- /dev/null
+++ b/src/org/traccar/protocol/DmtProtocol.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2017 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.jboss.netty.bootstrap.ServerBootstrap;
+import org.jboss.netty.channel.ChannelPipeline;
+import org.jboss.netty.handler.codec.frame.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.TrackerServer;
+
+import java.nio.ByteOrder;
+import java.util.List;
+
+public class DmtProtocol extends BaseProtocol {
+
+ public DmtProtocol() {
+ super("dmt");
+ }
+
+ @Override
+ public void initTrackerServers(List<TrackerServer> serverList) {
+ TrackerServer server = new TrackerServer(new ServerBootstrap(), getName()) {
+ @Override
+ protected void addSpecificHandlers(ChannelPipeline pipeline) {
+ pipeline.addLast("frameDecoder", new LengthFieldBasedFrameDecoder(1024, 3, 2));
+ pipeline.addLast("objectDecoder", new DmtProtocolDecoder(DmtProtocol.this));
+ }
+ };
+ server.setEndianness(ByteOrder.LITTLE_ENDIAN);
+ serverList.add(server);
+ }
+
+}
diff --git a/src/org/traccar/protocol/DmtProtocolDecoder.java b/src/org/traccar/protocol/DmtProtocolDecoder.java
new file mode 100644
index 000000000..4c641f397
--- /dev/null
+++ b/src/org/traccar/protocol/DmtProtocolDecoder.java
@@ -0,0 +1,147 @@
+/*
+ * Copyright 2017 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.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.ByteOrder;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class DmtProtocolDecoder extends BaseProtocolDecoder {
+
+ public DmtProtocolDecoder(DmtProtocol protocol) {
+ super(protocol);
+ }
+
+ public static final int MSG_HELLO = 0x00;
+ public static final int MSG_HELLO_RESPONSE = 0x01;
+ public static final int MSG_DATA_RECORD = 0x04;
+ public static final int MSG_COMMIT = 0x05;
+ public static final int MSG_COMMIT_RESPONSE = 0x06;
+
+ @Override
+ protected Object decode(
+ Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+ ChannelBuffer buf = (ChannelBuffer) msg;
+
+ buf.skipBytes(2); // header
+
+ int type = buf.readUnsignedByte();
+
+ buf.readUnsignedShort(); // length
+
+ if (type == MSG_HELLO) {
+
+ buf.readUnsignedInt(); // device serial number
+
+ DeviceSession deviceSession = getDeviceSession(
+ channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII));
+
+ if (channel != null) {
+ ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+ response.writeByte(0x02); response.writeByte(0x55); // header
+ response.writeByte(MSG_HELLO_RESPONSE);
+ response.writeShort(4 + 4);
+ response.writeInt((int) (System.currentTimeMillis() / 1000));
+ response.writeInt(deviceSession != null ? 0 : 1); // flags
+ channel.write(response);
+ }
+
+ } else if (type == MSG_COMMIT) {
+
+ if (channel != null) {
+ ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+ response.writeByte(0x02); response.writeByte(0x55); // header
+ response.writeByte(MSG_COMMIT_RESPONSE);
+ response.writeShort(1);
+ response.writeByte(1); // flags (success)
+ channel.write(response);
+ }
+
+ } else if (type == MSG_DATA_RECORD) {
+
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+ if (deviceSession == null) {
+ return null;
+ }
+
+ List<Position> positions = new LinkedList<>();
+
+ while (buf.readable()) {
+
+ int recordEnd = buf.readerIndex() + buf.readUnsignedShort();
+
+ Position position = new Position();
+ position.setProtocol(getProtocolName());
+ position.setDeviceId(deviceSession.getDeviceId());
+
+ position.set(Position.KEY_INDEX, buf.readUnsignedInt());
+
+ position.setDeviceTime(new Date(1356998400000L + buf.readUnsignedInt() * 1000)); // since 1 Jan 2013
+
+ position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+
+ while (buf.readerIndex() < recordEnd) {
+
+ int fieldId = buf.readUnsignedByte();
+ int fieldLength = buf.readUnsignedByte();
+ int fieldEnd = buf.readerIndex() + (fieldLength == 255 ? buf.readUnsignedShort() : fieldLength);
+
+ if (fieldId == 0) {
+
+ position.setFixTime(new Date(1356998400000L + buf.readUnsignedInt() * 1000));
+ position.setLatitude(buf.readInt() * 0.0000001);
+ position.setLongitude(buf.readInt() * 0.0000001);
+ position.setSpeed(UnitsConverter.knotsFromCps(buf.readUnsignedShort()));
+
+ buf.readUnsignedByte(); // speed accuracy
+
+ position.setCourse(buf.readUnsignedByte() * 2);
+
+ position.set(Position.KEY_PDOP, buf.readUnsignedByte() * 0.1);
+
+ position.setAccuracy(buf.readUnsignedByte());
+ position.setValid(buf.readUnsignedByte() != 0);
+
+ }
+
+ buf.readerIndex(fieldEnd);
+
+ }
+
+ positions.add(position);
+
+ }
+
+ return positions;
+
+ }
+
+ return null;
+ }
+
+}