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Don't send more than one ServerboundSwingPacket per tick

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Should address #2875
This commit is contained in:
Camotoy 2023-01-03 15:51:58 -05:00
parent c483204446
commit 00df4c26ba
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2 changed files with 18 additions and 4 deletions
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1
core/src/main/java/org/geysermc/geyser/session/GeyserSession.java
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@ -457,7 +457,6 @@ public class GeyserSession implements GeyserConnection, GeyserCommandSource {
* Counts how many ticks have occurred since an arm animation started.
* -1 means there is no active arm swing.
*/
@Getter(AccessLevel.NONE)
private int armAnimationTicks = -1;
/**

15
core/src/main/java/org/geysermc/geyser/translator/protocol/bedrock/BedrockAnimateTranslator.java
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@ -49,8 +49,23 @@ public class BedrockAnimateTranslator extends PacketTranslator<AnimatePacket> {
case SWING_ARM ->
// Delay so entity damage can be processed first
session.scheduleInEventLoop(() -> {
if (session.getArmAnimationTicks() != 0) {
// So, generally, a Java player can only do one *thing* at a time.
// If a player right-clicks, for example, then there's probably only one action associated with
// that right-click that will send a swing.
// The only exception I can think of to this, *maybe*, is a player dropping items
// Bedrock is a little funkier than this - it can send several arm animation packets in the
// same tick, notably with high levels of haste applied.
// Packet limiters do not like this and can crash the player.
// If arm animation ticks is 0, then we just sent an arm swing packet this tick.
// See https://github.com/GeyserMC/Geyser/issues/2875
// This behavior was last touched on with ViaVersion 4.5.1 (with its packet limiter), Java 1.16.5,
// and Bedrock 1.19.51.
// Note for the future: we should probably largely ignore this packet and instead replicate
// all actions on our end, and send swings where needed.
session.sendDownstreamPacket(new ServerboundSwingPacket(Hand.MAIN_HAND));
session.activateArmAnimationTicking();
}
},
25,
TimeUnit.MILLISECONDS