65 lines
2.3 KiB
Java
65 lines
2.3 KiB
Java
/*
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* This file is part of ViaLoader - https://github.com/RaphiMC/ViaLoader
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* Copyright (C) 2020-2024 RK_01/RaphiMC and contributors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.raphimc.vialoader.netty.viabedrock;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.handler.codec.MessageToMessageCodec;
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import org.cloudburstmc.netty.channel.raknet.RakConstants;
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import org.cloudburstmc.netty.channel.raknet.RakPing;
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import org.cloudburstmc.netty.channel.raknet.RakPong;
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import java.net.InetSocketAddress;
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import java.util.List;
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public class PingEncapsulationCodec extends MessageToMessageCodec<RakPong, ByteBuf> {
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private final InetSocketAddress remoteAddress;
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public PingEncapsulationCodec(final InetSocketAddress remoteAddress) {
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this.remoteAddress = remoteAddress;
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}
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@Override
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protected void encode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) {
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final int packetId = in.readUnsignedByte();
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if (packetId == RakConstants.ID_UNCONNECTED_PING) {
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out.add(new RakPing(in.readLong(), this.remoteAddress));
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} else {
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ctx.close();
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throw new IllegalStateException("Unexpected packet ID: " + packetId);
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}
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}
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@Override
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protected void decode(ChannelHandlerContext ctx, RakPong in, List<Object> out) {
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if (!this.remoteAddress.equals(in.getSender())) {
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ctx.close();
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throw new IllegalStateException("Received pong from unexpected address: " + in.getSender());
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}
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final ByteBuf buf = ctx.alloc().buffer();
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buf.writeByte(RakConstants.ID_UNCONNECTED_PONG);
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buf.writeLong(in.getPingTime());
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buf.writeBytes(in.getPongData());
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out.add(buf);
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}
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}
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