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-rw-r--r--src/org/traccar/protocol/NavisProtocolDecoder.java348
1 files changed, 348 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/NavisProtocolDecoder.java b/src/org/traccar/protocol/NavisProtocolDecoder.java
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index 000000000..1b3cd80f7
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+++ b/src/org/traccar/protocol/NavisProtocolDecoder.java
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+/*
+ * Copyright 2012 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.nio.ByteOrder;
+import java.nio.charset.Charset;
+import java.util.Calendar;
+import java.util.LinkedList;
+import java.util.List;
+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.GenericProtocolDecoder;
+import org.traccar.helper.Log;
+import org.traccar.model.DataManager;
+import org.traccar.model.Position;
+
+/**
+ * Navis protocol decoder
+ */
+public class NavisProtocolDecoder extends GenericProtocolDecoder {
+
+ private String prefix;
+ private long deviceId, serverId;
+
+ private static final Charset charset = Charset.defaultCharset();
+
+ private String imei;
+ private Long databaseDeviceId;
+
+ /**
+ * Initialize
+ */
+ public NavisProtocolDecoder(DataManager dataManager) {
+ super(dataManager);
+ }
+
+ // Format types
+ public static final int F10 = 0x01;
+ public static final int F20 = 0x02;
+ public static final int F30 = 0x03;
+ public static final int F40 = 0x04;
+ public static final int F50 = 0x05;
+ public static final int F51 = 0x15;
+ public static final int F52 = 0x25;
+
+ private static boolean isFormat(int type, int... types) {
+ for (int i : types) {
+ if (type == i) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ private Position parsePosition(ChannelBuffer buf) {
+ Position position = new Position();
+ StringBuilder extendedInfo = new StringBuilder("<protocol>navis</protocol>");
+
+ position.setDeviceId(databaseDeviceId);
+ position.setAltitude(0.0);
+
+ // Format type
+ int format;
+ if (buf.getUnsignedByte(buf.readerIndex()) == 0) {
+ format = buf.readUnsignedShort();
+ } else {
+ format = buf.readUnsignedByte();
+ }
+ extendedInfo.append("<format>");
+ extendedInfo.append(format);
+ extendedInfo.append("</format>");
+
+ position.setId(buf.readUnsignedInt()); // sequence number
+
+ // Event type
+ extendedInfo.append("<event>");
+ extendedInfo.append(buf.readUnsignedShort());
+ extendedInfo.append("</event>");
+
+ // Event time
+ Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
+ time.clear();
+ time.set(Calendar.HOUR, buf.readUnsignedByte());
+ time.set(Calendar.MINUTE, buf.readUnsignedByte());
+ time.set(Calendar.SECOND, buf.readUnsignedByte());
+ time.set(Calendar.DAY_OF_MONTH, buf.readUnsignedByte());
+ time.set(Calendar.MONTH, buf.readUnsignedByte());
+ time.set(Calendar.YEAR, 2000 + buf.readUnsignedByte());
+ extendedInfo.append("<time>");
+ extendedInfo.append(time.getTimeInMillis());
+ extendedInfo.append("</time>");
+
+ // Alarm status
+ extendedInfo.append("<alarm>");
+ extendedInfo.append(buf.readUnsignedByte());
+ extendedInfo.append("</alarm>");
+
+ // Modules status
+ extendedInfo.append("<status>");
+ extendedInfo.append(buf.readUnsignedByte());
+ extendedInfo.append("</status>");
+
+ // GSM signal
+ extendedInfo.append("<gsm>");
+ extendedInfo.append(buf.readUnsignedByte());
+ extendedInfo.append("</gsm>");
+
+ // Output
+ extendedInfo.append("<output>");
+ if (isFormat(format, F10, F20, F30)) {
+ extendedInfo.append(buf.readUnsignedShort());
+ } else if (isFormat(format, F40, F50, F51, F52)) {
+ extendedInfo.append(buf.readUnsignedByte());
+ }
+ extendedInfo.append("</output>");
+
+ // Input
+ extendedInfo.append("<input>");
+ if (isFormat(format, F10, F20, F30, F40)) {
+ extendedInfo.append(buf.readUnsignedShort());
+ } else if (isFormat(format, F50, F51, F52)) {
+ extendedInfo.append(buf.readUnsignedByte());
+ }
+ extendedInfo.append("</input>");
+
+ position.setPower(buf.readUnsignedShort() / 1000.0); // power
+
+ // Battery power
+ extendedInfo.append("<battery>");
+ extendedInfo.append(buf.readUnsignedShort());
+ extendedInfo.append("</battery>");
+
+ // Temperature
+ if (isFormat(format, F10, F20, F30)) {
+ extendedInfo.append("<temperature>");
+ extendedInfo.append(buf.readShort());
+ extendedInfo.append("</temperature>");
+ }
+
+ if (isFormat(format, F10, F20, F50, F52)) {
+ // ADC 1
+ extendedInfo.append("<adc1>");
+ extendedInfo.append(buf.readUnsignedShort());
+ extendedInfo.append("</adc1>");
+
+ // ADC 2
+ extendedInfo.append("<adc2>");
+ extendedInfo.append(buf.readUnsignedShort());
+ extendedInfo.append("</adc2>");
+ }
+
+ if (isFormat(format, F20, F50, F51, F52)) {
+ // Impulse counters
+ buf.readUnsignedInt();
+ buf.readUnsignedInt();
+ }
+
+ if (isFormat(format, F20, F50, F51, F52)) {
+ // Validity
+ int locationStatus = buf.readUnsignedByte();
+ position.setValid((locationStatus & 0x02) == 0x02);
+
+ // Location time
+ time.clear();
+ time.set(Calendar.HOUR, buf.readUnsignedByte());
+ time.set(Calendar.MINUTE, buf.readUnsignedByte());
+ time.set(Calendar.SECOND, buf.readUnsignedByte());
+ time.set(Calendar.DAY_OF_MONTH, buf.readUnsignedByte());
+ time.set(Calendar.MONTH, buf.readUnsignedByte());
+ time.set(Calendar.YEAR, 2000 + buf.readUnsignedByte());
+ position.setTime(time.getTime());
+
+ // Location data
+ position.setLatitude(buf.readFloat() / Math.PI * 180);
+ position.setLongitude(buf.readFloat() / Math.PI * 180);
+ position.setSpeed((double) buf.readFloat());
+ position.setCourse((double) buf.readUnsignedShort());
+
+ // Milage
+ extendedInfo.append("<milage>");
+ extendedInfo.append(buf.readFloat());
+ extendedInfo.append("</milage>");
+
+ // Last segment
+ extendedInfo.append("<segment>");
+ extendedInfo.append(buf.readFloat());
+ extendedInfo.append("</segment>");
+
+ // Segment times
+ buf.readUnsignedShort();
+ buf.readUnsignedShort();
+ }
+
+ if (isFormat(format, F51, F52)) {
+ // Other stuff
+ buf.readUnsignedShort();
+ buf.readByte();
+ buf.readUnsignedShort();
+ buf.readUnsignedShort();
+ buf.readByte();
+ buf.readUnsignedShort();
+ buf.readUnsignedShort();
+ buf.readByte();
+ buf.readUnsignedShort();
+ }
+
+ if (isFormat(format, F40, F52)) {
+ // Four temperature sensors
+ buf.readByte();
+ buf.readByte();
+ buf.readByte();
+ buf.readByte();
+ }
+
+ // Extended info
+ position.setExtendedInfo(extendedInfo.toString());
+
+ return position;
+ }
+
+ private Object processSingle(Channel channel, ChannelBuffer buf) {
+ Position position = parsePosition(buf);
+
+ ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 8);
+ response.writeBytes(ChannelBuffers.copiedBuffer(ByteOrder.LITTLE_ENDIAN, "*<T", charset));
+ response.writeInt(position.getId().intValue());
+ sendReply(channel, response);
+
+ // No location data
+ if (position.getValid() == null) {
+ return null;
+ }
+
+ return position;
+ }
+
+ private Object processArray(Channel channel, ChannelBuffer buf) {
+ List<Position> positions = new LinkedList<Position>();
+ int count = buf.readUnsignedByte();
+
+ for (int i = 0; i < count; i++) {
+ Position position = parsePosition(buf);
+ if (position.getValid() != null) {
+ positions.add(position);
+ }
+ }
+
+ ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 8);
+ response.writeBytes(ChannelBuffers.copiedBuffer(ByteOrder.LITTLE_ENDIAN, "*<A", charset));
+ response.writeByte(count);
+ sendReply(channel, response);
+
+ // No location data
+ if (positions.isEmpty()) {
+ return null;
+ }
+
+ return positions;
+ }
+
+ private Object processHandshake(Channel channel, ChannelBuffer buf) {
+ buf.readByte(); // semicolon symbol
+ imei = buf.toString(Charset.defaultCharset());
+
+ try {
+ databaseDeviceId = getDataManager().getDeviceByImei(imei).getId();
+ sendReply(channel, ChannelBuffers.copiedBuffer(ByteOrder.LITTLE_ENDIAN, "*<S", charset));
+ } catch(Exception error) {
+ Log.warning(error.toString());
+ }
+ return null;
+ }
+
+ private static short checksum(ChannelBuffer buf) {
+ short sum = 0;
+ for (int i = 0; i < buf.readableBytes(); i++) {
+ sum ^= buf.getUnsignedByte(i);
+ }
+ return sum;
+ }
+
+ private void sendReply(Channel channel, ChannelBuffer data) {
+ ChannelBuffer header = ChannelBuffers.directBuffer(ByteOrder.LITTLE_ENDIAN, 16);
+ header.writeBytes(ChannelBuffers.copiedBuffer(ByteOrder.LITTLE_ENDIAN, prefix, charset));
+ header.writeInt((int) deviceId);
+ header.writeInt((int) serverId);
+ header.writeShort(data.readableBytes());
+ header.writeByte(checksum(data));
+ header.writeByte(checksum(header));
+
+ if (channel != null) {
+ channel.write(ChannelBuffers.copiedBuffer(header, data));
+ }
+ }
+
+ /**
+ * Decode message
+ */
+ protected Object decode(
+ ChannelHandlerContext ctx, Channel channel, Object msg)
+ throws Exception {
+
+ ChannelBuffer buf = (ChannelBuffer) msg;
+
+ // Read header
+ prefix = buf.toString(buf.readerIndex(), 4, charset);
+ buf.skipBytes(prefix.length()); // prefix @NTC by default
+ serverId = buf.readUnsignedInt();
+ deviceId = buf.readUnsignedInt();
+ int length = buf.readUnsignedShort();
+ buf.skipBytes(2); // header and data XOR checksum
+
+ if (length == 0) {
+ return null; // keep alive message
+ }
+
+ // Read message type
+ String type = buf.toString(buf.readerIndex(), 3, charset);
+ buf.skipBytes(type.length());
+
+ if (type.equals("*>T")) {
+ return processSingle(channel, buf);
+ } else if (type.equals("*>A")) {
+ return processArray(channel, buf);
+ } else if (type.equals("*>S")) {
+ return processHandshake(channel, buf);
+ }
+
+ return null;
+ }
+
+}