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authorAnton Tananaev <anton.tananaev@gmail.com>2020-02-02 16:06:09 -0800
committerAnton Tananaev <anton.tananaev@gmail.com>2020-02-02 16:06:09 -0800
commit00f8b1ff552f49ebcb5c1d13c85bd84911a2ac8d (patch)
tree1dcde1c1838b461659b86c838b0676a69b89cf5f
parentc6ce16f71d3cb8c04c080ebd57c5dd53e2b9229a (diff)
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Refactor frame decoder
-rw-r--r--src/main/java/org/traccar/protocol/Arnavi4FrameDecoder.java28
-rw-r--r--src/main/java/org/traccar/protocol/Arnavi4ProtocolDecoder.java1
2 files changed, 12 insertions, 17 deletions
diff --git a/src/main/java/org/traccar/protocol/Arnavi4FrameDecoder.java b/src/main/java/org/traccar/protocol/Arnavi4FrameDecoder.java
index 6a6f820b0..8a2681b55 100644
--- a/src/main/java/org/traccar/protocol/Arnavi4FrameDecoder.java
+++ b/src/main/java/org/traccar/protocol/Arnavi4FrameDecoder.java
@@ -1,4 +1,5 @@
/*
+ * Copyright 2020 Anton Tananaev (anton@traccar.org)
* Copyright 2017 Ivan Muratov (binakot@gmail.com)
*
* Licensed under the Apache License, Version 2.0 (the "License");
@@ -22,11 +23,9 @@ import org.traccar.BaseFrameDecoder;
public class Arnavi4FrameDecoder extends BaseFrameDecoder {
- private static final int MIN_LENGTH = 4;
private static final int HEADER_LENGTH = 10;
private static final int PACKET_WRAPPER_LENGTH = 8;
- private static final int COMMAND_ANSWER_PACKET_LENGTH = 4;
- private static final int COMMAND_ANSWER_PARCEL_NUMBER = 0xfd;
+ private static final int RESULT_TYPE = 0xfd;
private static final byte PACKAGE_END_SIGN = 0x5d;
private boolean firstPacket = true;
@@ -34,7 +33,7 @@ public class Arnavi4FrameDecoder extends BaseFrameDecoder {
@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
- if (buf.readableBytes() < MIN_LENGTH) {
+ if (buf.readableBytes() < 4) {
return null;
}
@@ -43,23 +42,18 @@ public class Arnavi4FrameDecoder extends BaseFrameDecoder {
firstPacket = false;
length = HEADER_LENGTH;
} else {
- int index = buf.getUnsignedByte(1);
- if (index == COMMAND_ANSWER_PARCEL_NUMBER) {
- length = COMMAND_ANSWER_PACKET_LENGTH;
+ int type = buf.getUnsignedByte(1);
+ if (type == RESULT_TYPE) {
+ length = 4;
} else {
- int pos = 2;
- while (pos + PACKET_WRAPPER_LENGTH < buf.readableBytes()
- && buf.getByte(pos) != PACKAGE_END_SIGN) {
-
- int dataLength = buf.getUnsignedShortLE(pos + 1);
- pos += PACKET_WRAPPER_LENGTH + dataLength;
+ int index = 2;
+ while (index + PACKET_WRAPPER_LENGTH < buf.readableBytes() && buf.getByte(index) != PACKAGE_END_SIGN) {
+ index += PACKET_WRAPPER_LENGTH + buf.getUnsignedShortLE(index + 1);
}
-
- if (buf.getByte(pos) != PACKAGE_END_SIGN) {
+ if (buf.getByte(index) != PACKAGE_END_SIGN) {
return null;
}
-
- length = pos + 1;
+ length = index + 1;
}
}
diff --git a/src/main/java/org/traccar/protocol/Arnavi4ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Arnavi4ProtocolDecoder.java
index 94ad8bb1f..3e0fa5d9f 100644
--- a/src/main/java/org/traccar/protocol/Arnavi4ProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/Arnavi4ProtocolDecoder.java
@@ -1,4 +1,5 @@
/*
+ * Copyright 2020 Anton Tananaev (anton@traccar.org)
* Copyright 2017 Ivan Muratov (binakot@gmail.com)
*
* Licensed under the Apache License, Version 2.0 (the "License");