blob: dbafd1476b1e4ad7f3f7bc81832626bdf9e07cfe (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/*
* Copyright 2019 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.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.traccar.protocol;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import org.traccar.BaseFrameDecoder;
public class PstFrameDecoder extends BaseFrameDecoder {
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
while (buf.isReadable() && buf.getByte(buf.readerIndex()) == 0x28) {
buf.skipBytes(1);
}
int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x29);
if (endIndex > 0) {
ByteBuf result = Unpooled.buffer(endIndex - buf.readerIndex());
while (buf.readerIndex() < endIndex) {
int b = buf.readUnsignedByte();
if (b == 0x27) {
b = buf.readUnsignedByte() ^ 0x40;
}
result.writeByte(b);
}
buf.skipBytes(1);
return result;
}
return null;
}
}
|
