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fea7ec356d
Upstream has released updates that appears to apply and compile correctly. This update has not been tested by PaperMC and as with ANY update, please do your own testing BungeeCord Changes: f0908b66 Add optional 1.17 (21w19a) snapshot protocol support 5fa596fe #3084: (Regrettably) add a full SLF4J wrapper
127 lines
5.8 KiB
Diff
127 lines
5.8 KiB
Diff
From ec9c98165375395d0ab4726f8b56182495682203 Mon Sep 17 00:00:00 2001
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From: Techcable <Techcable@techcable.net>
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Date: Thu, 19 May 2016 17:09:22 -0600
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Subject: [PATCH] Allow invalid packet ids for forge servers
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Some forge mods (COFH) use negative packet ids instead of plugin channels for 'reasons'.
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Vanilla servers still error on negative/invalid packets.
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Original issue: https://github.com/WaterfallMC/Waterfall-Old/issues/11
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diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/MinecraftDecoder.java b/protocol/src/main/java/net/md_5/bungee/protocol/MinecraftDecoder.java
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index d36b7f3c..5e03e175 100644
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--- a/protocol/src/main/java/net/md_5/bungee/protocol/MinecraftDecoder.java
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+++ b/protocol/src/main/java/net/md_5/bungee/protocol/MinecraftDecoder.java
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@@ -16,6 +16,14 @@ public class MinecraftDecoder extends MessageToMessageDecoder<ByteBuf>
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private final boolean server;
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@Setter
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private int protocolVersion;
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+ @Setter
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+ private boolean supportsForge = false;
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+
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+ public MinecraftDecoder(Protocol protocol, boolean server, int protocolVersion) {
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+ this.protocol = protocol;
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+ this.server = server;
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+ this.protocolVersion = protocolVersion;
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+ }
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@Override
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protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception
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@@ -34,7 +42,7 @@ public class MinecraftDecoder extends MessageToMessageDecoder<ByteBuf>
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{
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int packetId = DefinedPacket.readVarInt( in );
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- DefinedPacket packet = prot.createPacket( packetId, protocolVersion );
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+ DefinedPacket packet = prot.createPacket( packetId, protocolVersion, supportsForge );
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if ( packet != null )
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{
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packet.read( in, prot.getDirection(), protocolVersion );
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diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java b/protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java
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index de94bfda..4b16a50f 100644
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--- a/protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java
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+++ b/protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java
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@@ -475,14 +475,23 @@ public enum Protocol
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return protocol;
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}
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+ public boolean hasPacket(int i, boolean supportsForge) {
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+ return supportsForge || i >= 0 && i <= MAX_PACKET_ID;
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+ }
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+
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public final DefinedPacket createPacket(int id, int version)
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+ {
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+ return createPacket(id, version, true);
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+ }
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+
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+ public final DefinedPacket createPacket(int id, int version, boolean supportsForge)
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{
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ProtocolData protocolData = getProtocolData( version );
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if ( protocolData == null )
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{
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throw new BadPacketException( "Unsupported protocol version " + version );
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}
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- if ( id > MAX_PACKET_ID )
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+ if ( !hasPacket(id, supportsForge) )
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{
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throw new BadPacketException( "Packet with id " + id + " outside of range " );
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}
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diff --git a/proxy/src/main/java/net/md_5/bungee/ServerConnector.java b/proxy/src/main/java/net/md_5/bungee/ServerConnector.java
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index bafd741b..4d0fa540 100644
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--- a/proxy/src/main/java/net/md_5/bungee/ServerConnector.java
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+++ b/proxy/src/main/java/net/md_5/bungee/ServerConnector.java
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@@ -32,7 +32,9 @@ import net.md_5.bungee.forge.ForgeUtils;
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import net.md_5.bungee.netty.ChannelWrapper;
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import net.md_5.bungee.netty.HandlerBoss;
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import net.md_5.bungee.netty.PacketHandler;
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+import net.md_5.bungee.netty.PipelineUtils;
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import net.md_5.bungee.protocol.DefinedPacket;
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+import net.md_5.bungee.protocol.MinecraftDecoder;
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import net.md_5.bungee.protocol.PacketWrapper;
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import net.md_5.bungee.protocol.Protocol;
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import net.md_5.bungee.protocol.ProtocolConstants;
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@@ -205,6 +207,12 @@ public class ServerConnector extends PacketHandler
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ServerConnection server = new ServerConnection( ch, target );
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ServerConnectedEvent event = new ServerConnectedEvent( user, server );
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+
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+ if (server.isForgeServer() && user.isForgeUser()) {
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+ ((MinecraftDecoder) server.getCh().getHandle().pipeline().get(PipelineUtils.PACKET_DECODER)).setSupportsForge(true);
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+ ((MinecraftDecoder) user.getCh().getHandle().pipeline().get(PipelineUtils.PACKET_DECODER)).setSupportsForge(true);
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+ }
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+
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bungee.getPluginManager().callEvent( event );
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ch.write( BungeeCord.getInstance().registerChannels( user.getPendingConnection().getVersion() ) );
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diff --git a/proxy/src/main/java/net/md_5/bungee/UserConnection.java b/proxy/src/main/java/net/md_5/bungee/UserConnection.java
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index cb722d78..b0e7e392 100644
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--- a/proxy/src/main/java/net/md_5/bungee/UserConnection.java
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+++ b/proxy/src/main/java/net/md_5/bungee/UserConnection.java
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@@ -72,6 +72,7 @@ public final class UserConnection implements ProxiedPlayer
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@NonNull
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private final ProxyServer bungee;
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@NonNull
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+ @Getter
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private final ChannelWrapper ch;
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@Getter
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@NonNull
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diff --git a/proxy/src/main/java/net/md_5/bungee/entitymap/EntityMap.java b/proxy/src/main/java/net/md_5/bungee/entitymap/EntityMap.java
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index 93989ee9..2e6cf764 100644
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--- a/proxy/src/main/java/net/md_5/bungee/entitymap/EntityMap.java
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+++ b/proxy/src/main/java/net/md_5/bungee/entitymap/EntityMap.java
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@@ -324,6 +324,12 @@ public abstract class EntityMap
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int packetId = DefinedPacket.readVarInt( packet );
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int packetIdLength = packet.readerIndex() - readerIndex;
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+ if (packetId < 0 || packetId > ints.length || packetId > varints.length) { // Invalid packet id
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+ // Ignore these invalid packets for compatibility reasons
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+ packet.readerIndex( readerIndex );
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+ return;
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+ }
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+
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if ( ints[packetId] )
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{
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rewriteInt( packet, oldId, newId, readerIndex + packetIdLength );
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--
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2.31.1
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