diff options
Diffstat (limited to 'src/main/java/org/traccar/protocol/HuabaoFrameEncoder.java')
-rw-r--r-- | src/main/java/org/traccar/protocol/HuabaoFrameEncoder.java | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/HuabaoFrameEncoder.java b/src/main/java/org/traccar/protocol/HuabaoFrameEncoder.java new file mode 100644 index 000000000..5e48a466a --- /dev/null +++ b/src/main/java/org/traccar/protocol/HuabaoFrameEncoder.java @@ -0,0 +1,42 @@ +/* + * Copyright 2024 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.channel.ChannelHandlerContext; +import io.netty.handler.codec.MessageToByteEncoder; + +public class HuabaoFrameEncoder extends MessageToByteEncoder<ByteBuf> { + + @Override + protected void encode(ChannelHandlerContext ctx, ByteBuf msg, ByteBuf out) { + + int startIndex = msg.readerIndex(); + while (msg.isReadable()) { + int index = msg.readerIndex(); + int b = msg.readUnsignedByte(); + if (b == 0x7d) { + out.writeByte(0x7d); + out.writeByte(0x01); + } else if (b == 0x7e && index != startIndex && msg.isReadable()) { + out.writeByte(0x7d); + out.writeByte(0x02); + } else { + out.writeByte(b); + } + } + } +} |