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-rw-r--r--src/main/java/org/traccar/protocol/EskyFrameDecoder.java20
1 files changed, 12 insertions, 8 deletions
diff --git a/src/main/java/org/traccar/protocol/EskyFrameDecoder.java b/src/main/java/org/traccar/protocol/EskyFrameDecoder.java
index da24c1273..a374f29b1 100644
--- a/src/main/java/org/traccar/protocol/EskyFrameDecoder.java
+++ b/src/main/java/org/traccar/protocol/EskyFrameDecoder.java
@@ -1,5 +1,5 @@
/*
- * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 - 2020 Anton Tananaev (anton@traccar.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -26,14 +26,18 @@ public class EskyFrameDecoder extends BaseFrameDecoder {
protected Object decode(
ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
- buf.readerIndex(buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 'E'));
-
- int endIndex = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 'E');
- if (endIndex > 0) {
- return buf.readRetainedSlice(endIndex - buf.readerIndex());
- } else {
- return buf.readRetainedSlice(buf.readableBytes()); // assume full frame
+ int startIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 'E');
+ if (startIndex >= 0) {
+ buf.readerIndex(startIndex);
+ int endIndex = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 'E');
+ if (endIndex > 0) {
+ return buf.readRetainedSlice(endIndex - buf.readerIndex());
+ } else {
+ return buf.readRetainedSlice(buf.readableBytes()); // assume full frame
+ }
}
+
+ return null;
}
}