/* * Copyright 2020 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 PstFrameEncoder extends MessageToByteEncoder<ByteBuf> { @Override protected void encode(ChannelHandlerContext ctx, ByteBuf msg, ByteBuf out) { out.writeByte('('); while (msg.isReadable()) { int b = msg.readUnsignedByte(); if (b == 0x27 || b == 0x28 || b == 0x29) { out.writeByte(0x27); out.writeByte(b ^ 0x40); } else { out.writeByte(b); } } out.writeByte(')'); } }