diff options
Diffstat (limited to 'src/org/traccar/protocol')
| -rw-r--r-- | src/org/traccar/protocol/Pt502FrameDecoder.java | 47 |
1 files changed, 32 insertions, 15 deletions
diff --git a/src/org/traccar/protocol/Pt502FrameDecoder.java b/src/org/traccar/protocol/Pt502FrameDecoder.java index 252c8dd02..4d3e9b4d5 100644 --- a/src/org/traccar/protocol/Pt502FrameDecoder.java +++ b/src/org/traccar/protocol/Pt502FrameDecoder.java @@ -1,5 +1,5 @@ /* - * Copyright 2014 - 2017 Anton Tananaev (anton@traccar.org) + * Copyright 2014 - 2018 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. @@ -20,6 +20,8 @@ import org.jboss.netty.channel.Channel; import org.jboss.netty.channel.ChannelHandlerContext; import org.jboss.netty.handler.codec.frame.FrameDecoder; +import java.nio.charset.StandardCharsets; + public class Pt502FrameDecoder extends FrameDecoder { private static final int BINARY_HEADER = 5; @@ -28,26 +30,41 @@ public class Pt502FrameDecoder extends FrameDecoder { protected Object decode( ChannelHandlerContext ctx, Channel channel, ChannelBuffer buf) throws Exception { - if (buf.readableBytes() < BINARY_HEADER) { + if (buf.readableBytes() < 10) { return null; } - if (buf.getUnsignedByte(buf.readerIndex()) == 0xbf) { - buf.skipBytes(BINARY_HEADER); - } + if (buf.getUnsignedByte(buf.readerIndex()) == 0xbf + && buf.toString(buf.readerIndex() + BINARY_HEADER, 4, StandardCharsets.US_ASCII).equals("$PHD")) { - int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\r'); - if (index < 0) { - index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\n'); - } + int length = buf.getUnsignedShort(buf.readerIndex() + 3); + if (buf.readableBytes() >= length) { + buf.skipBytes(BINARY_HEADER); + ChannelBuffer result = buf.readBytes(length - BINARY_HEADER - 2); + buf.skipBytes(2); // line break + return result; + } + + } else { - if (index > 0) { - ChannelBuffer result = buf.readBytes(index - buf.readerIndex()); - while (buf.readable() - && (buf.getByte(buf.readerIndex()) == '\r' || buf.getByte(buf.readerIndex()) == '\n')) { - buf.skipBytes(1); + if (buf.getUnsignedByte(buf.readerIndex()) == 0xbf) { + buf.skipBytes(BINARY_HEADER); } - return result; + + int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\r'); + if (index < 0) { + index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\n'); + } + + if (index > 0) { + ChannelBuffer result = buf.readBytes(index - buf.readerIndex()); + while (buf.readable() + && (buf.getByte(buf.readerIndex()) == '\r' || buf.getByte(buf.readerIndex()) == '\n')) { + buf.skipBytes(1); + } + return result; + } + } return null; |