123 lines
5.6 KiB
Diff
123 lines
5.6 KiB
Diff
From e41f8d2465c135cede5d3065647c943c2e3e5435 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 e7cb380..447eaae 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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@@ -27,7 +35,7 @@ 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 2cbe052..08621b6 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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@@ -275,14 +275,18 @@ public enum Protocol
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return protocol;
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}
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- public final DefinedPacket createPacket(int id, int version)
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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, 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" );
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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 5ed9fe4..7d14ea7 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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@@ -29,7 +29,9 @@ 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.Protocol;
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import net.md_5.bungee.protocol.packet.BossBar;
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import net.md_5.bungee.protocol.packet.EncryptionRequest;
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@@ -183,6 +185,12 @@ 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() );
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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 9881b75..c88ab49 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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@@ -76,6 +76,7 @@ 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 02881ac..9ba9633 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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@@ -103,6 +103,12 @@ 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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2.8.3
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