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-rw-r--r--src/org/traccar/protocol/NavisFrameDecoder.java29
1 files changed, 15 insertions, 14 deletions
diff --git a/src/org/traccar/protocol/NavisFrameDecoder.java b/src/org/traccar/protocol/NavisFrameDecoder.java
index 1d77c0d65..ff367ba77 100644
--- a/src/org/traccar/protocol/NavisFrameDecoder.java
+++ b/src/org/traccar/protocol/NavisFrameDecoder.java
@@ -19,6 +19,7 @@ import io.netty.buffer.ByteBuf;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.TooLongFrameException;
+import java.nio.charset.StandardCharsets;
import org.traccar.BaseFrameDecoder;
public class NavisFrameDecoder extends BaseFrameDecoder {
@@ -46,31 +47,31 @@ public class NavisFrameDecoder extends BaseFrameDecoder {
if (buf.getByte(buf.readerIndex()) == 0x7F) {
// FLEX keep alive frame
return buf.readRetainedSlice(1);
- } else if (buf.getByte(buf.readerIndex()) == 0x7E /* "~" */) {
+ }
+
+ if (protocolDecoder.getFlexDataSize() > 0) {
// FLEX frame
- if (protocolDecoder.getFlexDataSize() == 0) {
- return null;
- }
if (buf.readableBytes() > MAX_FRAME_LENGTH) {
throw new TooLongFrameException();
}
if (buf.readableBytes() > FLEX_HEADER_LENGTH) {
int length = 0;
- switch (buf.getByte(buf.readerIndex() + 1)) {
+ String type = buf.toString(buf.readerIndex(), 2, StandardCharsets.US_ASCII);
+ switch (type) {
// FLEX 1.0
- case 0x41: // "A"
+ case "~A":
length = protocolDecoder.getFlexDataSize()
- * buf.getByte(buf.readerIndex() + FLEX_HEADER_LENGTH) + 2;
+ * buf.getByte(buf.readerIndex() + FLEX_HEADER_LENGTH) + 1 + 1;
break;
- case 0x54: // "T"
- length = protocolDecoder.getFlexDataSize() + 5;
+ case "~T":
+ length = protocolDecoder.getFlexDataSize() + 4 + 1;
break;
- case 0x43: // "C"
+ case "~C":
length = protocolDecoder.getFlexDataSize() + 1;
break;
// FLEX 2.0 (Extra packages)
- case 0x45: // "E"
+ case "~E":
length++;
for (int i = 0; i < buf.getByte(buf.readerIndex() + FLEX_HEADER_LENGTH); i++) {
if (buf.readableBytes() > FLEX_HEADER_LENGTH + length + 1) {
@@ -81,11 +82,11 @@ public class NavisFrameDecoder extends BaseFrameDecoder {
}
length++;
break;
- case 0x58: // "X"
- length = buf.getUnsignedShortLE(buf.readerIndex() + FLEX_HEADER_LENGTH) + 7;
+ case "~X":
+ length = buf.getUnsignedShortLE(buf.readerIndex() + FLEX_HEADER_LENGTH) + 4 + 1;
break;
default:
- break;
+ return null;
}
if (buf.readableBytes() >= FLEX_HEADER_LENGTH + length) {