diff --git a/core/src/main/java/org/geysermc/geyser/network/UpstreamPacketHandler.java b/core/src/main/java/org/geysermc/geyser/network/UpstreamPacketHandler.java index a0b104adb..7a22b8a42 100644 --- a/core/src/main/java/org/geysermc/geyser/network/UpstreamPacketHandler.java +++ b/core/src/main/java/org/geysermc/geyser/network/UpstreamPacketHandler.java @@ -28,6 +28,8 @@ package org.geysermc.geyser.network; import io.netty.buffer.Unpooled; import org.cloudburstmc.protocol.bedrock.BedrockDisconnectReasons; import org.cloudburstmc.protocol.bedrock.codec.BedrockCodec; +import org.cloudburstmc.protocol.bedrock.codec.compat.BedrockCompat; +import org.cloudburstmc.protocol.bedrock.codec.v622.Bedrock_v622; import org.cloudburstmc.protocol.bedrock.data.ExperimentData; import org.cloudburstmc.protocol.bedrock.data.PacketCompressionAlgorithm; import org.cloudburstmc.protocol.bedrock.data.ResourcePackType; @@ -108,6 +110,10 @@ public class UpstreamPacketHandler extends LoggingPacketHandler { session.disconnect(disconnectMessage); return false; } else if (protocolVersion < GameProtocol.DEFAULT_BEDROCK_CODEC.getProtocolVersion()) { + if (protocolVersion < Bedrock_v622.CODEC.getProtocolVersion()) { + // https://github.com/GeyserMC/Geyser/issues/4378 + session.getUpstream().getSession().setCodec(BedrockCompat.CODEC_LEGACY); + } session.disconnect(GeyserLocale.getLocaleStringLog("geyser.network.outdated.client", supportedVersions)); return false; } else {