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authorAnton Tananaev <anton.tananaev@gmail.com>2015-03-13 15:18:57 +1300
committerAnton Tananaev <anton.tananaev@gmail.com>2015-03-13 15:18:57 +1300
commitb5eb588704b76a4535e656253f3d50df1b046c68 (patch)
treef148bbfc02b55ac366104cde68d15dee591e6e70
parentcee735f6934c18b44b5529787224344aa3412ffa (diff)
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Reimplement BCE frame decoder
-rw-r--r--src/org/traccar/protocol/BceFrameDecoder.java31
-rw-r--r--test/org/traccar/protocol/BceProtocolDecoderTest.java4
2 files changed, 26 insertions, 9 deletions
diff --git a/src/org/traccar/protocol/BceFrameDecoder.java b/src/org/traccar/protocol/BceFrameDecoder.java
index 2bb249348..8accc02d8 100644
--- a/src/org/traccar/protocol/BceFrameDecoder.java
+++ b/src/org/traccar/protocol/BceFrameDecoder.java
@@ -18,30 +18,45 @@ package org.traccar.protocol;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.frame.FrameDecoder;
import org.jboss.netty.handler.codec.frame.LengthFieldBasedFrameDecoder;
-public class BceFrameDecoder extends LengthFieldBasedFrameDecoder {
+public class BceFrameDecoder extends FrameDecoder {
private static final int HANDSHAKE_LENGTH = 7; // "#BCE#\r\n"
-
+
private boolean header = true;
-
- public BceFrameDecoder() {
- super(1024, 8, 2, 8 + 2 + 1, 0);
+
+ private static byte checksum(ChannelBuffer buf, int end) {
+ byte result = 0;
+ for (int i = 0; i < end; i++) {
+ result += buf.getByte(buf.readerIndex() + i);
+ }
+ return result;
}
-
+
@Override
protected Object decode(
ChannelHandlerContext ctx,
Channel channel,
ChannelBuffer buf) throws Exception {
-
+
if (header && buf.readableBytes() >= HANDSHAKE_LENGTH) {
buf.skipBytes(HANDSHAKE_LENGTH);
header = false;
}
- return super.decode(ctx, channel, buf);
+ int end = 8; // IMEI
+
+ while (buf.readableBytes() >= end + 2 + 1 + 1 + 1) {
+ end += buf.getUnsignedShort(buf.readerIndex() + end) + 2;
+
+ if (buf.readableBytes() > end && checksum(buf, end) == buf.getByte(buf.readerIndex() + end)) {
+ return buf.readBytes(end + 1);
+ }
+ }
+
+ return null;
}
}
diff --git a/test/org/traccar/protocol/BceProtocolDecoderTest.java b/test/org/traccar/protocol/BceProtocolDecoderTest.java
index 21ef125d5..f8120bfa9 100644
--- a/test/org/traccar/protocol/BceProtocolDecoderTest.java
+++ b/test/org/traccar/protocol/BceProtocolDecoderTest.java
@@ -1,6 +1,8 @@
package org.traccar.protocol;
import java.nio.ByteOrder;
+
+import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.junit.Test;
import org.traccar.helper.ChannelBufferTools;
@@ -26,7 +28,7 @@ public class BceProtocolDecoderTest {
verify(decoder.decode(null, null, ChannelBuffers.wrappedBuffer(ByteOrder.LITTLE_ENDIAN, ChannelBufferTools.convertHexString(
"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"))));
- *//*verify(decoder.decode(null, null, ChannelBuffers.wrappedBuffer(ByteOrder.LITTLE_ENDIAN, ChannelBufferTools.convertHexString(
+ verify(decoder.decode(null, null, ChannelBuffers.wrappedBuffer(ByteOrder.LITTLE_ENDIAN, ChannelBufferTools.convertHexString(
"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"))));
verify(decoder.decode(null, null, ChannelBuffers.wrappedBuffer(ByteOrder.LITTLE_ENDIAN, ChannelBufferTools.convertHexString(