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authorAnton Tananaev <anton.tananaev@gmail.com>2016-01-02 11:36:43 +1300
committerAnton Tananaev <anton.tananaev@gmail.com>2016-01-02 11:36:43 +1300
commitba3cfd639270dd3115eedd29c832322b01b5b032 (patch)
tree676b857514b14c093193f87bd8f56647f74d4757 /src/org/traccar/protocol/NvsProtocolDecoder.java
parent865c6e3fdccc5b59b55501aa58fd921cdb8a1ec1 (diff)
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Implement NVS GNSS communication protocol
Diffstat (limited to 'src/org/traccar/protocol/NvsProtocolDecoder.java')
-rw-r--r--src/org/traccar/protocol/NvsProtocolDecoder.java129
1 files changed, 129 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/NvsProtocolDecoder.java b/src/org/traccar/protocol/NvsProtocolDecoder.java
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+/*
+ * Copyright 2016 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * 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.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.Charset;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class NvsProtocolDecoder extends BaseProtocolDecoder {
+
+ public NvsProtocolDecoder(NvsProtocol protocol) {
+ super(protocol);
+ }
+
+ private void sendResponse(Channel channel, String response) {
+ if (channel != null) {
+ channel.write(response);
+ }
+ }
+
+ @Override
+ protected Object decode(
+ Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+ ChannelBuffer buf = (ChannelBuffer) msg;
+
+ buf.skipBytes(4); // marker
+ int length = buf.readUnsignedShort();
+
+ if (length == 15 + 3) {
+
+ String imei = buf.toString(buf.readerIndex(), 15, Charset.defaultCharset());
+
+ if (!identify(imei, channel, remoteAddress)) {
+ sendResponse(channel, "NO01");
+ } else {
+ sendResponse(channel, "OK");
+ }
+
+ } else if (hasDeviceId()) {
+
+ List<Position> positions = new LinkedList<>();
+
+ buf.readLong(); // imei
+ buf.readUnsignedByte(); // codec
+ int count = buf.readUnsignedByte();
+
+ for (int i = 0; i < count; i++) {
+ Position position = new Position();
+ position.setProtocol(getProtocolName());
+ position.setDeviceId(getDeviceId());
+
+ position.setTime(new Date(buf.readUnsignedInt() * 1000));
+
+ position.set("reason", buf.readUnsignedByte());
+
+ position.setLongitude(buf.readInt() / 10000000.0);
+ position.setLatitude(buf.readInt() / 10000000.0);
+ position.setAltitude(buf.readShort());
+ position.setCourse(buf.readUnsignedShort());
+
+ position.set(Event.KEY_SATELLITES, buf.readUnsignedByte());
+
+ position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
+ position.setValid(buf.readUnsignedByte() != 0);
+
+ buf.readUnsignedByte(); // used systems
+
+ buf.readUnsignedByte(); // cause element id
+
+ // Read 1 byte data
+ int cnt = buf.readUnsignedByte();
+ for (int j = 0; j < cnt; j++) {
+ position.set(Event.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedByte());
+ }
+
+ // Read 2 byte data
+ cnt = buf.readUnsignedByte();
+ for (int j = 0; j < cnt; j++) {
+ position.set(Event.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedShort());
+ }
+
+ // Read 4 byte data
+ cnt = buf.readUnsignedByte();
+ for (int j = 0; j < cnt; j++) {
+ position.set(Event.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedInt());
+ }
+
+ // Read 8 byte data
+ cnt = buf.readUnsignedByte();
+ for (int j = 0; j < cnt; j++) {
+ position.set(Event.PREFIX_IO + buf.readUnsignedByte(), buf.readLong());
+ }
+
+ positions.add(position);
+ }
+
+ return positions;
+
+ }
+
+ return null;
+ }
+
+}