Where is support for the new 1.21.4 client input packet?

[spring-dependency-management]

package net.minecraft.network.protocol.game;

import net.minecraft.network.FriendlyByteBuf;
import net.minecraft.network.codec.StreamCodec;
import net.minecraft.network.protocol.Packet;
import net.minecraft.network.protocol.PacketType;
import net.minecraft.world.entity.player.Input;

public record ServerboundPlayerInputPacket(Input input) implements Packet<ServerGamePacketListener> {
	public static final StreamCodec<FriendlyByteBuf, ServerboundPlayerInputPacket> STREAM_CODEC = StreamCodec.composite(
		Input.STREAM_CODEC, ServerboundPlayerInputPacket::input, ServerboundPlayerInputPacket::new
	);

	@Override
	public PacketType<ServerboundPlayerInputPacket> type() {
		return GamePacketTypes.SERVERBOUND_PLAYER_INPUT;
	}

	public void handle(ServerGamePacketListener serverGamePacketListener) {
		serverGamePacketListener.handlePlayerInput(this);
	}
}

public record Input(boolean forward, boolean backward, boolean left, boolean right, boolean jump, boolean shift, boolean sprint) {
	private static final byte FLAG_FORWARD = 1;
	private static final byte FLAG_BACKWARD = 2;
	private static final byte FLAG_LEFT = 4;
	private static final byte FLAG_RIGHT = 8;
	private static final byte FLAG_JUMP = 16;
	private static final byte FLAG_SHIFT = 32;
	private static final byte FLAG_SPRINT = 64;
	public static final StreamCodec<FriendlyByteBuf, Input> STREAM_CODEC = new StreamCodec<FriendlyByteBuf, Input>() {
		public void encode(FriendlyByteBuf friendlyByteBuf, Input input) {
			byte b = 0;
			b = (byte)(b | (input.forward() ? 1 : 0));
			b = (byte)(b | (input.backward() ? 2 : 0));
			b = (byte)(b | (input.left() ? 4 : 0));
			b = (byte)(b | (input.right() ? 8 : 0));
			b = (byte)(b | (input.jump() ? 16 : 0));
			b = (byte)(b | (input.shift() ? 32 : 0));
			b = (byte)(b | (input.sprint() ? 64 : 0));
			friendlyByteBuf.writeByte(b);
		}

		public Input decode(FriendlyByteBuf friendlyByteBuf) {
			byte b = friendlyByteBuf.readByte();
			boolean bl = (b & 1) != 0;
			boolean bl2 = (b & 2) != 0;
			boolean bl3 = (b & 4) != 0;
			boolean bl4 = (b & 8) != 0;
			boolean bl5 = (b & 16) != 0;
			boolean bl6 = (b & 32) != 0;
			boolean bl7 = (b & 64) != 0;
			return new Input(bl, bl2, bl3, bl4, bl5, bl6, bl7);
		}
	};
	public static Input EMPTY = new Input(false, false, false, false, false, false, false);
}

I believe protocollib mistakes this new packet for a steer vehicle packet (ServerboundMoveVehiclePacket), this is a new and completely separate packet, also ENTITY_TELEPORT silently breaks in 1.21.4 unless you replace it with ENTITY_POSITION_SYNC.

[Cxom]

It is worth noting that the old Steer Vehicle packet is not equivalent to the new Move Vehicle packet either. The former sends input data while the latter sends position data.

[spring-dependency-management]

It is worth noting that the old Steer Vehicle packet is not equivalent to the new Move Vehicle packet either. The former sends input data while the latter sends position data.

Yes I think there are quite a few weird naming inconsistences with packets and the authors should decide what version of minecraft protocollib is for, since ATM maintaining backwards compatibility hurts everyone