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authorAnton Tananaev <anton.tananaev@gmail.com>2014-01-18 19:07:39 +1300
committerAnton Tananaev <anton.tananaev@gmail.com>2014-01-18 19:07:39 +1300
commitba4af96c2b771e3984887de0a4d2d7338aed1270 (patch)
tree1a44ff7bd7d8292d67986b7c51aa1b50504050d1 /src/org/traccar/protocol/KhdProtocolDecoder.java
parent0f0bcf8bf31723e67d703d8ea67e40a921536d9a (diff)
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Implement KHD protocol
Diffstat (limited to 'src/org/traccar/protocol/KhdProtocolDecoder.java')
-rw-r--r--src/org/traccar/protocol/KhdProtocolDecoder.java152
1 files changed, 152 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/KhdProtocolDecoder.java b/src/org/traccar/protocol/KhdProtocolDecoder.java
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+++ b/src/org/traccar/protocol/KhdProtocolDecoder.java
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+/*
+ * Copyright 2014 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 java.util.Calendar;
+import java.util.TimeZone;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.ServerManager;
+import org.traccar.helper.ChannelBufferTools;
+import org.traccar.helper.Crc;
+import org.traccar.helper.Log;
+import org.traccar.model.ExtendedInfoFormatter;
+import org.traccar.model.Position;
+
+public class KhdProtocolDecoder extends BaseProtocolDecoder {
+
+ public KhdProtocolDecoder(ServerManager serverManager) {
+ super(serverManager);
+ }
+
+ private String readSerialNumber(ChannelBuffer buf) {
+ int b1 = buf.readUnsignedByte();
+ int b2 = buf.readUnsignedByte(); if (b2 > 0x80) b2 -= 0x80;
+ int b3 = buf.readUnsignedByte(); if (b3 > 0x80) b3 -= 0x80;
+ int b4 = buf.readUnsignedByte();
+ String serialNumber = String.format("%02d%02d%02d%02d", b1, b2, b3, b4);
+ return String.valueOf(Integer.valueOf(serialNumber));
+ }
+
+ private static final int MSG_LOGIN = 0xB1;
+ private static final int MSG_CONFIRMATION = 0x21;
+ private static final int MSG_ON_DEMAND = 0x81;
+ private static final int MSG_POSITION_UPLOAD = 0x80;
+ private static final int MSG_POSITION_REUPLOAD = 0x8E;
+ private static final int MSG_ALARM = 0x82;
+ private static final int MSG_REPLY = 0x85;
+ private static final int MSG_PERIPHERAL = 0xA3;
+
+ @Override
+ protected Object decode(
+ ChannelHandlerContext ctx, Channel channel, Object msg)
+ throws Exception {
+
+ ChannelBuffer buf = (ChannelBuffer) msg;
+
+ buf.skipBytes(2); // header
+ int type = buf.readUnsignedByte();
+ buf.readUnsignedShort(); // size
+
+ if (type == MSG_ON_DEMAND ||
+ type == MSG_POSITION_UPLOAD ||
+ type == MSG_POSITION_REUPLOAD ||
+ type == MSG_ALARM ||
+ type == MSG_REPLY ||
+ type == MSG_PERIPHERAL) {
+
+ // Create new position
+ Position position = new Position();
+ ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter("khd");
+
+ // Device identification
+ String id = readSerialNumber(buf);
+ try {
+ position.setDeviceId(getDataManager().getDeviceByImei(id).getId());
+ } catch(Exception error) {
+ Log.warning("Unknown device - " + id);
+ }
+
+ // Date and time
+ Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
+ time.clear();
+ time.set(Calendar.YEAR, 2000 + ChannelBufferTools.readHexInteger(buf, 2));
+ time.set(Calendar.MONTH, ChannelBufferTools.readHexInteger(buf, 2) - 1);
+ time.set(Calendar.DAY_OF_MONTH, ChannelBufferTools.readHexInteger(buf, 2));
+ time.set(Calendar.HOUR, ChannelBufferTools.readHexInteger(buf, 2));
+ time.set(Calendar.MINUTE, ChannelBufferTools.readHexInteger(buf, 2));
+ time.set(Calendar.SECOND, ChannelBufferTools.readHexInteger(buf, 2));
+ position.setTime(time.getTime());
+
+ // Location
+ position.setLatitude(ChannelBufferTools.readCoordinate(buf));
+ position.setLongitude(ChannelBufferTools.readCoordinate(buf));
+ position.setSpeed(ChannelBufferTools.readHexInteger(buf, 4) * 0.539957);
+ position.setCourse((double) ChannelBufferTools.readHexInteger(buf, 4));
+ position.setAltitude(0.0);
+
+ // Flags
+ int flags = buf.readUnsignedByte();
+ position.setValid((flags & 0x80) != 0);
+
+ if (type == MSG_ALARM) {
+
+ buf.skipBytes(2);
+
+ } else {
+
+ // Milage
+ extendedInfo.set("milage", buf.readUnsignedMedium());
+
+ // Status
+ buf.skipBytes(4);
+
+ // Other
+ buf.skipBytes(8);
+
+ }
+
+ // TODO: parse extra data
+
+ position.setExtendedInfo(extendedInfo.toString());
+ return position;
+ }
+
+ else if (type == MSG_LOGIN && channel != null) {
+
+ buf.skipBytes(4); // serial number
+ buf.readByte(); // reserved
+
+ ChannelBuffer response = ChannelBuffers.directBuffer(10);
+ response.writeByte(0x29); response.writeByte(0x29); // header
+ response.writeByte(MSG_CONFIRMATION);
+ response.writeShort(5); // size
+ response.writeByte(buf.readUnsignedByte());
+ response.writeByte(type);
+ response.writeByte(0); // reserved
+ response.writeByte(Crc.xorChecksum(response.toByteBuffer(0, 8)));
+ response.writeByte(0x0D); // ending
+ channel.write(response);
+
+ }
+
+ return null;
+ }
+
+}