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-rw-r--r--src/main/java/org/traccar/protocol/FleetGuideProtocolDecoder.java68
1 files changed, 63 insertions, 5 deletions
diff --git a/src/main/java/org/traccar/protocol/FleetGuideProtocolDecoder.java b/src/main/java/org/traccar/protocol/FleetGuideProtocolDecoder.java
index 9fddec922..ba4d9cfae 100644
--- a/src/main/java/org/traccar/protocol/FleetGuideProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/FleetGuideProtocolDecoder.java
@@ -19,8 +19,10 @@ import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
+import org.traccar.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import org.traccar.session.DeviceSession;
@@ -38,9 +40,13 @@ public class FleetGuideProtocolDecoder extends BaseProtocolDecoder {
super(protocol);
}
- public static final int MSG_DATA = 0x10;
- public static final int MSG_HEARTBEAT = 0x1A;
- public static final int MSG_RESPONSE = 0x1C;
+ public static final int MSG_EMPTY = 0;
+ public static final int MSG_SYNC_REQ = 1;
+ public static final int MSG_SYNC_ACK = 2;
+ public static final int MSG_DATA_R_ACK = 3;
+ public static final int MSG_DATA_N_ACK = 4;
+ public static final int MSG_REP_R_ACK = 5;
+ public static final int MSG_REP_N_ACK = 6;
@Override
protected Object decode(
@@ -53,9 +59,12 @@ public class FleetGuideProtocolDecoder extends BaseProtocolDecoder {
int length = BitUtil.to(options, 11);
DeviceSession deviceSession;
+ Long deviceId;
if (BitUtil.check(options, 11)) {
- deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(buf.readUnsignedIntLE()));
+ deviceId = buf.readUnsignedIntLE();
+ deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(deviceId));
} else {
+ deviceId = null;
deviceSession = getDeviceSession(channel, remoteAddress);
}
if (deviceSession == null) {
@@ -63,12 +72,24 @@ public class FleetGuideProtocolDecoder extends BaseProtocolDecoder {
}
int type;
+ Integer index;
if (BitUtil.check(options, 12)) {
- type = BitUtil.to(buf.readUnsignedByte(), 4);
+ int value = buf.readUnsignedByte();
+ type = BitUtil.to(value, 4);
+ index = BitUtil.from(value, 4);
} else {
type = 0;
+ index = null;
}
+ Integer responseType;
+ if (type == MSG_SYNC_REQ) {
+ responseType = MSG_SYNC_ACK;
+ } else {
+ responseType = null;
+ }
+ sendResponse(channel, remoteAddress, deviceId, responseType, index);
+
if (BitUtil.check(options, 13)) {
buf.readUnsignedShortLE(); // acknowledgement
}
@@ -153,6 +174,43 @@ public class FleetGuideProtocolDecoder extends BaseProtocolDecoder {
return position;
}
+
+ private void sendResponse(
+ Channel channel, SocketAddress remoteAddress, Long deviceId, Integer type, Integer index) {
+ if (channel != null) {
+
+ ByteBuf response = Unpooled.buffer();
+ response.writeByte(0x53); // signature
+
+ int options = 0;
+ if (deviceId != null) {
+ options |= 1 << 11;
+ }
+ if (type != null) {
+ options |= 1 << 12;
+ }
+ if (index != null) {
+ options |= 1 << 13;
+ }
+ response.writeShortLE(options);
+
+ if (deviceId != null) {
+ response.writeIntLE(deviceId.intValue());
+ }
+ if (type != null) {
+ response.writeByte(type);
+ }
+ if (index != null) {
+ int mask = (1 << (index + 1)) - 1;
+ response.writeShortLE(mask);
+ }
+ response.writeShortLE(Checksum.crc16(
+ Checksum.CRC16_CCITT_FALSE, response.nioBuffer(1, response.writerIndex() - 1)));
+
+ channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+ }
+ }
+
private int readVarSize(ByteBuf buf) {
int b;
int y = 0;