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Diffstat (limited to 'src/org/traccar/protocol/EgtsProtocolDecoder.java')
-rw-r--r--src/org/traccar/protocol/EgtsProtocolDecoder.java115
1 files changed, 98 insertions, 17 deletions
diff --git a/src/org/traccar/protocol/EgtsProtocolDecoder.java b/src/org/traccar/protocol/EgtsProtocolDecoder.java
index d05504d81..420701e6c 100644
--- a/src/org/traccar/protocol/EgtsProtocolDecoder.java
+++ b/src/org/traccar/protocol/EgtsProtocolDecoder.java
@@ -16,13 +16,18 @@
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.BitUtil;
+import org.traccar.helper.Checksum;
+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;
@@ -33,6 +38,10 @@ public class EgtsProtocolDecoder extends BaseProtocolDecoder {
super(protocol);
}
+ public static final int PT_RESPONSE = 0;
+ public static final int PT_APPDATA = 1;
+ public static final int PT_SIGNED_APPDATA = 2;
+
public static final int SERVICE_AUTH = 1;
public static final int SERVICE_TELEDATA = 2;
public static final int SERVICE_COMMANDS = 4;
@@ -60,6 +69,44 @@ public class EgtsProtocolDecoder extends BaseProtocolDecoder {
public static final int MSG_LIQUID_LEVEL_SENSOR = 27;
public static final int MSG_PASSENGERS_COUNTERS = 28;
+ private int packetId;
+
+ private void sendResponse(
+ Channel channel, int packetType, int index, int serviceType, int type, ChannelBuffer content) {
+ if (channel != null) {
+
+ ChannelBuffer data = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+ data.writeByte(type);
+ data.writeShort(content.readableBytes());
+ data.writeBytes(content);
+
+ ChannelBuffer record = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+ record.writeShort(data.readableBytes());
+ record.writeShort(index);
+ record.writeByte(1 << 6); // flags
+ record.writeByte(serviceType);
+ record.writeByte(serviceType);
+ record.writeBytes(data);
+ int recordChecksum = Checksum.crc16(Checksum.CRC16_CCITT_FALSE, record.toByteBuffer());
+
+ ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+ response.writeByte(1); // protocol version
+ response.writeByte(0); // security key id
+ response.writeByte(0); // flags
+ response.writeByte(5 + 2 + 2 + 2); // header length
+ response.writeByte(0); // encoding
+ response.writeShort(record.readableBytes());
+ response.writeShort(packetId++);
+ response.writeByte(packetType);
+ response.writeByte(Checksum.crc8(Checksum.CRC8_EGTS, response.toByteBuffer()));
+ response.writeBytes(record);
+ response.writeShort(recordChecksum);
+
+ channel.write(response);
+
+ }
+ }
+
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
@@ -68,26 +115,16 @@ public class EgtsProtocolDecoder extends BaseProtocolDecoder {
buf.skipBytes(buf.getUnsignedByte(buf.readerIndex() + 3));
- DeviceSession deviceSession = null;
List<Position> positions = new LinkedList<>();
while (buf.readableBytes() > 2) {
int length = buf.readUnsignedShort();
-
- buf.readUnsignedShort(); // index
-
+ int index = buf.readUnsignedShort();
int recordFlags = buf.readUnsignedByte();
if (BitUtil.check(recordFlags, 0)) {
- String deviceId = String.valueOf(buf.readUnsignedInt());
- if (deviceSession == null) {
- deviceSession = getDeviceSession(channel, remoteAddress, deviceId);
- }
- }
-
- if (deviceSession == null) {
- deviceSession = getDeviceSession(channel, remoteAddress);
+ buf.readUnsignedInt(); // object id
}
if (BitUtil.check(recordFlags, 1)) {
@@ -97,19 +134,61 @@ public class EgtsProtocolDecoder extends BaseProtocolDecoder {
buf.readUnsignedInt(); // time
}
- buf.readUnsignedByte(); // source service type
+ int serviceType = buf.readUnsignedByte();
buf.readUnsignedByte(); // recipient service type
int recordEnd = buf.readerIndex() + length;
Position position = new Position(getProtocolName());
- position.setDeviceId(deviceSession.getDeviceId());
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+ if (deviceSession != null) {
+ position.setDeviceId(deviceSession.getDeviceId());
+ }
+
+ ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+ response.writeShort(index);
+ response.writeByte(0); // success
+ sendResponse(channel, PT_RESPONSE, index, serviceType, MSG_RECORD_RESPONSE, response);
while (buf.readerIndex() < recordEnd) {
int type = buf.readUnsignedByte();
int end = buf.readUnsignedShort() + buf.readerIndex();
- if (type == MSG_POS_DATA) {
+ if (type == MSG_TERM_IDENTITY) {
+
+ buf.readUnsignedInt(); // object id
+ int flags = buf.readUnsignedByte();
+
+ if (BitUtil.check(flags, 0)) {
+ buf.readUnsignedShort(); // home dispatcher identifier
+ }
+ if (BitUtil.check(flags, 1)) {
+ getDeviceSession(
+ channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII).trim());
+ }
+ if (BitUtil.check(flags, 2)) {
+ getDeviceSession(
+ channel, remoteAddress, buf.readBytes(16).toString(StandardCharsets.US_ASCII).trim());
+ }
+ if (BitUtil.check(flags, 3)) {
+ buf.skipBytes(3); // language identifier
+ }
+ if (BitUtil.check(flags, 5)) {
+ buf.skipBytes(3); // network identifier
+ }
+ if (BitUtil.check(flags, 6)) {
+ buf.readUnsignedShort(); // buffer size
+ }
+ if (BitUtil.check(flags, 7)) {
+ getDeviceSession(
+ channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII).trim());
+ }
+
+ response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+ response.writeByte(0); // success
+ sendResponse(channel, PT_APPDATA, index, serviceType, MSG_RESULT_CODE, response);
+
+ } else if (type == MSG_POS_DATA) {
position.setTime(new Date((buf.readUnsignedInt() + 1262304000) * 1000)); // since 2010-01-01
position.setLatitude(buf.readUnsignedInt() * 90.0 / 0xFFFFFFFFL);
@@ -125,7 +204,7 @@ public class EgtsProtocolDecoder extends BaseProtocolDecoder {
}
int speed = buf.readUnsignedShort();
- position.setSpeed(BitUtil.to(speed, 14));
+ position.setSpeed(UnitsConverter.knotsFromKph(BitUtil.to(speed, 14) * 0.1));
position.setCourse(buf.readUnsignedByte() + (BitUtil.check(speed, 15) ? 0x100 : 0));
position.set(Position.KEY_ODOMETER, buf.readUnsignedMedium() * 100);
@@ -166,7 +245,9 @@ public class EgtsProtocolDecoder extends BaseProtocolDecoder {
buf.readerIndex(end);
}
- positions.add(position);
+ if (serviceType == SERVICE_TELEDATA && deviceSession != null) {
+ positions.add(position);
+ }
}
return positions.isEmpty() ? null : positions;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-04 08:48:36 +0000