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Start working on 1.19.4
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@@ -1,26 +0,0 @@
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Sat, 2 May 2020 03:09:46 -0400
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Subject: [PATCH] Validate PickItem Packet and kick for invalid
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diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -0,0 +0,0 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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@Override
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public void handlePickItem(ServerboundPickItemPacket packet) {
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PacketUtils.ensureRunningOnSameThread(packet, this, this.player.getLevel());
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- this.player.getInventory().pickSlot(packet.getSlot());
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+ // Paper start - validate pick item position
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+ if (!(packet.getSlot() >= 0 && packet.getSlot() < this.player.getInventory().items.size())) {
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+ ServerGamePacketListenerImpl.LOGGER.warn("{} tried to set an invalid carried item", this.player.getName().getString());
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+ this.disconnect("Invalid hotbar selection (Hacking?)");
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+ return;
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+ }
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+ this.player.getInventory().pickSlot(packet.getSlot()); // Paper - Diff above if changed
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+ // Paper end
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this.player.connection.send(new ClientboundContainerSetSlotPacket(-2, 0, this.player.getInventory().selected, this.player.getInventory().getItem(this.player.getInventory().selected)));
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this.player.connection.send(new ClientboundContainerSetSlotPacket(-2, 0, packet.getSlot(), this.player.getInventory().getItem(packet.getSlot())));
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this.player.connection.send(new ClientboundSetCarriedItemPacket(this.player.getInventory().selected));
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