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authorAnton Tananaev <anton.tananaev@gmail.com>2018-03-27 00:49:29 +1300
committerAnton Tananaev <anton.tananaev@gmail.com>2018-03-27 00:49:29 +1300
commit094a9acabf8f0b94d1c62f77a409dbf7e3b137f6 (patch)
treebcae7f282c10eeca2677dca2e9acc9839a8a6759 /src/org/traccar/protocol/WatchFrameDecoder.java
parentd847f80334498bde6993b8f3a38c7df05d83b47b (diff)
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Improve Watch frame decoding
Diffstat (limited to 'src/org/traccar/protocol/WatchFrameDecoder.java')
-rw-r--r--src/org/traccar/protocol/WatchFrameDecoder.java14
1 files changed, 9 insertions, 5 deletions
diff --git a/src/org/traccar/protocol/WatchFrameDecoder.java b/src/org/traccar/protocol/WatchFrameDecoder.java
index 9adea2843..f6b5ef12c 100644
--- a/src/org/traccar/protocol/WatchFrameDecoder.java
+++ b/src/org/traccar/protocol/WatchFrameDecoder.java
@@ -37,11 +37,6 @@ public class WatchFrameDecoder extends FrameDecoder {
int lengthIndex = buf.indexOf(idIndex, buf.writerIndex(), (byte) '*') + 1;
if (lengthIndex <= 0) {
return null;
- } else if (lengthIndex - idIndex > 10 + 1) {
- lengthIndex = buf.indexOf(lengthIndex, buf.writerIndex(), (byte) '*') + 1;
- if (lengthIndex <= 0) {
- return null;
- }
}
int payloadIndex = buf.indexOf(lengthIndex, buf.writerIndex(), (byte) '*');
@@ -49,6 +44,15 @@ public class WatchFrameDecoder extends FrameDecoder {
return null;
}
+ if (payloadIndex + 5 < buf.writerIndex() && buf.getByte(payloadIndex + 5) == '*'
+ && buf.toString(payloadIndex + 1, 4, StandardCharsets.US_ASCII).matches("[0-9A-F]+")) {
+ lengthIndex = payloadIndex + 1;
+ payloadIndex = buf.indexOf(lengthIndex, buf.writerIndex(), (byte) '*');
+ if (payloadIndex < 0) {
+ return null;
+ }
+ }
+
int length = Integer.parseInt(
buf.toString(lengthIndex, payloadIndex - lengthIndex, StandardCharsets.US_ASCII), 16);
if (buf.readableBytes() >= payloadIndex + 1 + length + 1) {