Geyser/core/src/main/java/org/geysermc/geyser/network/netty/LocalServerChannelWrapper.java

59 lines
2.8 KiB
Java

/*
* Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @author GeyserMC
* @link https://github.com/GeyserMC/Geyser
*/
package org.geysermc.geyser.network.netty;
import io.netty.channel.local.LocalChannel;
import io.netty.channel.local.LocalServerChannel;
import io.netty.util.Attribute;
import org.geysermc.api.connection.Connection;
import org.geysermc.geyser.GeyserImpl;
import org.geysermc.geyser.floodgate.IntegratedFloodgateProvider;
/**
* If the incoming channel if an instance of LocalChannelWithRemoteAddress, this server creates a LocalChannelWrapper
* for the other end and attaches the spoofed remote address
*/
public class LocalServerChannelWrapper extends LocalServerChannel {
@Override
protected LocalChannel newLocalChannel(LocalChannel peer) {
// LocalChannel here should be an instance of LocalChannelWithRemoteAddress, which we can use to set the "remote address" on the other end
if (peer instanceof LocalChannelWithRemoteAddress) { // TODO also use attribute for this
LocalChannelWrapper channel = new LocalChannelWrapper(this, peer);
channel.wrapper().remoteAddress(((LocalChannelWithRemoteAddress) peer).spoofedRemoteAddress());
if (GeyserImpl.getInstance().getFloodgateProvider() instanceof IntegratedFloodgateProvider) {
Attribute<Connection> attribute = peer.attr(IntegratedFloodgateProvider.SESSION_KEY);
Connection session = attribute.get();
// Garbage collect since it's no longer relevant for the PacketLib side.
attribute.set(null);
channel.attr(IntegratedFloodgateProvider.SESSION_KEY).set(session);
}
return channel;
}
return super.newLocalChannel(peer);
}
}