Send player abilities packet to ensure the player is flying and can't move

Author: Lenni0451

src/main/java/net/lenni0451/miniconnect/server/protocol/LobbyPacketRegistry.java

@@ -35,6 +35,7 @@ public LobbyPacketRegistry() {
         this.registerPacket(MCPackets.S2C_OPEN_BOOK, S2COpenBookPacket::new);
         this.registerPacket(MCPackets.S2C_SET_EQUIPMENT, S2CSetEquipmentPacket::new);
         this.registerPacket(MCPackets.S2C_CONTAINER_SET_DATA, S2CContainerSetDataPacket::new);
+        this.registerPacket(MCPackets.S2C_PLAYER_ABILITIES, S2CPlayerAbilitiesPacket::new);
     }
 
 }

src/main/java/net/lenni0451/miniconnect/server/protocol/packets/play/s2c/S2CPlayerAbilitiesPacket.java

@@ -0,0 +1,37 @@
+package net.lenni0451.miniconnect.server.protocol.packets.play.s2c;
+
+import io.netty.buffer.ByteBuf;
+import lombok.AllArgsConstructor;
+import lombok.NoArgsConstructor;
+import net.raphimc.netminecraft.packet.Packet;
+
+@NoArgsConstructor
+@AllArgsConstructor
+public class S2CPlayerAbilitiesPacket implements Packet {
+
+    public boolean invulnerable;
+    public boolean isFlying;
+    public boolean canFly;
+    public boolean instabuild;
+    public float flyingSpeed;
+    public float walkingSpeed;
+
+
+    @Override
+    public void read(ByteBuf byteBuf, int i) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void write(ByteBuf byteBuf, int i) {
+        int flags = 0;
+        if (this.invulnerable) flags |= 0b1;
+        if (this.isFlying) flags |= 0b10;
+        if (this.canFly) flags |= 0b100;
+        if (this.instabuild) flags |= 0b1000;
+        byteBuf.writeByte(flags);
+        byteBuf.writeFloat(this.flyingSpeed);
+        byteBuf.writeFloat(this.walkingSpeed);
+    }
+
+}

src/main/java/net/lenni0451/miniconnect/server/states/PlayStateHandler.java

@@ -28,6 +28,7 @@ public PlayStateHandler(final LobbyServerHandler handler, final Channel channel)
 
     private void init() {
         this.send(new S2CLoginPacket(0, false, 1, 1, 1, false, false, false, 3, "minecraft:the_end", 0, 3, 0, false, false, null, 0, 0, false));
+        this.send(new S2CPlayerAbilitiesPacket(true, true, true, false, 0, 0));
         this.send(new S2CGameEventPacket(GameEventType.LEVEL_CHUNKS_LOAD_START.ordinal(), 0));
         for (int i = 0; i < 9; i++) {
             Chunk chunk = new Chunk1_18(i % 3, i / 3, new ChunkSection[ProtocolConstants.CHUNK_SECTION_COUNT], new CompoundTag(), new ArrayList<>());