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#3207: Rework the plugin message relaying system to allow unregistering channels

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PSNRigner 2021-11-12 19:37:58 +11:00 committed by md_5
parent c0c9b28582
commit c7b0c3cd48
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GPG Key ID: E8E901AC7C617C11
6 changed files with 46 additions and 149 deletions
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9
protocol/src/main/java/net/md_5/bungee/protocol/packet/PluginMessage.java
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@ -2,7 +2,6 @@ package net.md_5.bungee.protocol.packet;
import com.google.common.base.Function;
import com.google.common.base.Preconditions;
import com.google.common.base.Predicate;
import io.netty.buffer.ByteBuf;
import java.io.ByteArrayInputStream;
import java.io.DataInput;
@ -48,14 +47,6 @@ public class PluginMessage extends DefinedPacket
return "legacy:" + tag.toLowerCase( Locale.ROOT );
}
};
public static final Predicate<PluginMessage> SHOULD_RELAY = new Predicate<PluginMessage>()
{
@Override
public boolean apply(PluginMessage input)
{
return ( input.getTag().equals( "REGISTER" ) || input.getTag().equals( "minecraft:register" ) || input.getTag().equals( "MC|Brand" ) || input.getTag().equals( "minecraft:brand" ) ) && input.getData().length < Byte.MAX_VALUE;
}
};
//
private String tag;
private byte[] data;

13
proxy/src/main/java/net/md_5/bungee/ServerConnector.java
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@ -1,9 +1,11 @@
package net.md_5.bungee;
import com.google.common.base.Joiner;
import com.google.common.base.Preconditions;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import java.net.InetSocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.Locale;
import java.util.Queue;
import java.util.Set;
@ -193,9 +195,16 @@ public class ServerConnector extends PacketHandler
}
}
for ( PluginMessage message : user.getPendingConnection().getRelayMessages() )
PluginMessage brandMessage = user.getPendingConnection().getBrandMessage();
if ( brandMessage != null )
{
ch.write( message );
ch.write( brandMessage );
}
Set<String> registeredChannels = user.getPendingConnection().getRegisteredChannels();
if ( !registeredChannels.isEmpty() )
{
ch.write( new PluginMessage( user.getPendingConnection().getVersion() >= ProtocolConstants.MINECRAFT_1_13 ? "minecraft:register" : "REGISTER", Joiner.on( "\0" ).join( registeredChannels ).getBytes( StandardCharsets.UTF_8 ), false ) );
}
if ( user.getSettings() != null )

42
proxy/src/main/java/net/md_5/bungee/connection/InitialHandler.java
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@ -7,8 +7,10 @@ import java.math.BigInteger;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.util.List;
import java.util.HashSet;
import java.util.Set;
import java.util.UUID;
import java.util.logging.Level;
import javax.crypto.SecretKey;
@ -63,7 +65,6 @@ import net.md_5.bungee.protocol.packet.PluginMessage;
import net.md_5.bungee.protocol.packet.StatusRequest;
import net.md_5.bungee.protocol.packet.StatusResponse;
import net.md_5.bungee.util.AllowedCharacters;
import net.md_5.bungee.util.BoundedArrayList;
import net.md_5.bungee.util.BufUtil;
import net.md_5.bungee.util.QuietException;
@ -81,7 +82,9 @@ public class InitialHandler extends PacketHandler implements PendingConnection
private LoginRequest loginRequest;
private EncryptionRequest request;
@Getter
private final List<PluginMessage> relayMessages = new BoundedArrayList<>( 128 );
private PluginMessage brandMessage;
@Getter
private final Set<String> registeredChannels = new HashSet<>();
private State thisState = State.HANDSHAKE;
private final Unsafe unsafe = new Unsafe()
{
@ -154,11 +157,7 @@ public class InitialHandler extends PacketHandler implements PendingConnection
@Override
public void handle(PluginMessage pluginMessage) throws Exception
{
// TODO: Unregister?
if ( PluginMessage.SHOULD_RELAY.apply( pluginMessage ) )
{
relayMessages.add( pluginMessage );
}
this.relayMessage( pluginMessage );
}
@Override
@ -668,4 +667,31 @@ public class InitialHandler extends PacketHandler implements PendingConnection
{
return !ch.isClosed();
}
public void relayMessage(PluginMessage input) throws Exception
{
if ( input.getTag().equals( "REGISTER" ) || input.getTag().equals( "minecraft:register" ) )
{
String content = new String( input.getData(), StandardCharsets.UTF_8 );
for ( String id : content.split( "\0" ) )
{
Preconditions.checkState( registeredChannels.size() < 128, "Too many registered channels" );
Preconditions.checkArgument( id.length() < 128, "Channel name too long" );
registeredChannels.add( id );
}
} else if ( input.getTag().equals( "UNREGISTER" ) || input.getTag().equals( "minecraft:unregister" ) )
{
String content = new String( input.getData(), StandardCharsets.UTF_8 );
for ( String id : content.split( "\0" ) )
{
registeredChannels.remove( id );
}
} else if ( input.getTag().equals( "MC|Brand" ) || input.getTag().equals( "minecraft:brand" ) )
{
brandMessage = input;
}
}
}

6
proxy/src/main/java/net/md_5/bungee/connection/UpstreamBridge.java
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@ -265,11 +265,7 @@ public class UpstreamBridge extends PacketHandler
throw CancelSendSignal.INSTANCE;
}
// TODO: Unregister as well?
if ( PluginMessage.SHOULD_RELAY.apply( pluginMessage ) )
{
con.getPendingConnection().getRelayMessages().add( pluginMessage );
}
con.getPendingConnection().relayMessage( pluginMessage );
}
@Override

49
proxy/src/main/java/net/md_5/bungee/util/BoundedArrayList.java
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@ -1,49 +0,0 @@
package net.md_5.bungee.util;
import com.google.common.base.Preconditions;
import java.util.ArrayList;
import java.util.Collection;
public class BoundedArrayList<E> extends ArrayList<E>
{
private final int maxSize;
public BoundedArrayList(int maxSize)
{
this.maxSize = maxSize;
}
private void checkSize(int increment)
{
Preconditions.checkState( size() + increment <= maxSize, "Adding %s elements would exceed capacity of %s", increment, maxSize );
}
@Override
public boolean add(E e)
{
checkSize( 1 );
return super.add( e );
}
@Override
public void add(int index, E element)
{
checkSize( 1 );
super.add( index, element );
}
@Override
public boolean addAll(Collection<? extends E> c)
{
checkSize( c.size() );
return super.addAll( c );
}
@Override
public boolean addAll(int index, Collection<? extends E> c)
{
checkSize( c.size() );
return super.addAll( index, c );
}
}

76
proxy/src/test/java/net/md_5/bungee/util/BoundedArrayListTest.java
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@ -1,76 +0,0 @@
package net.md_5.bungee.util;
import com.google.common.collect.ImmutableList;
import org.junit.Test;
public class BoundedArrayListTest
{
@Test
public void testGoodAdd() throws Exception
{
BoundedArrayList<Object> list = new BoundedArrayList<>( 2 );
list.add( new Object() );
list.add( new Object() );
}
@Test
public void testSizeOneAdd() throws Exception
{
BoundedArrayList<Object> list = new BoundedArrayList<>( 1 );
list.add( new Object() );
}
@Test(expected = IllegalStateException.class)
public void testBadAdd() throws Exception
{
BoundedArrayList<Object> list = new BoundedArrayList<>( 0 );
list.add( new Object() );
}
@Test
public void testGoodAdd1() throws Exception
{
BoundedArrayList<Object> list = new BoundedArrayList<>( 2 );
list.add( new Object() );
list.add( 0, new Object() );
}
@Test(expected = IllegalStateException.class)
public void testBadAdd1() throws Exception
{
BoundedArrayList<Object> list = new BoundedArrayList<>( 1 );
list.add( new Object() );
list.add( 0, new Object() );
}
@Test
public void testGoodAddAll() throws Exception
{
BoundedArrayList<Object> list = new BoundedArrayList<>( 1 );
list.addAll( ImmutableList.of( new Object() ) );
}
@Test
public void testGoodAddAll1() throws Exception
{
BoundedArrayList<Object> list = new BoundedArrayList<>( 2 );
list.add( new Object() );
list.addAll( 0, ImmutableList.of( new Object() ) );
}
@Test(expected = IllegalStateException.class)
public void testBadAddAll() throws Exception
{
BoundedArrayList<Object> list = new BoundedArrayList<>( 0 );
list.addAll( ImmutableList.of( new Object() ) );
}
@Test(expected = IllegalStateException.class)
public void testBadAddAll1() throws Exception
{
BoundedArrayList<Object> list = new BoundedArrayList<>( 1 );
list.add( new Object() );
list.addAll( ImmutableList.of( new Object() ) );
}
}