From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Shane Freeder Date: Sun, 11 Nov 2018 21:01:09 +0000 Subject: [PATCH] Don't allow digging into unloaded chunks diff --git a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java index a8d33286832786031ac57e6ce27d5181e1a3d9b1..e8b12b27e5ec74afb940f575e5ce78e5905d55f4 100644 --- a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java +++ b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java @@ -119,8 +119,8 @@ public class ServerPlayerGameMode { BlockState iblockdata; if (this.hasDelayedDestroy) { - iblockdata = this.level.getBlockState(this.delayedDestroyPos); - if (iblockdata.isAir()) { + iblockdata = this.level.getBlockStateIfLoaded(this.delayedDestroyPos); // Paper - Don't allow digging into unloaded chunks + if (iblockdata == null || iblockdata.isAir()) { // Paper - Don't allow digging into unloaded chunks this.hasDelayedDestroy = false; } else { float f = this.incrementDestroyProgress(iblockdata, this.delayedDestroyPos, this.delayedTickStart); @@ -131,7 +131,13 @@ public class ServerPlayerGameMode { } } } else if (this.isDestroyingBlock) { - iblockdata = this.level.getBlockState(this.destroyPos); + // Paper start - Don't allow digging into unloaded chunks; don't want to do same logic as above, return instead + iblockdata = this.level.getBlockStateIfLoaded(this.destroyPos); + if (iblockdata == null) { + this.isDestroyingBlock = false; + return; + } + // Paper end - Don't allow digging into unloaded chunks if (iblockdata.isAir()) { this.level.destroyBlockProgress(this.player.getId(), this.destroyPos, -1); this.lastSentState = -1; @@ -160,6 +166,7 @@ public class ServerPlayerGameMode { public void handleBlockBreakAction(BlockPos pos, ServerboundPlayerActionPacket.Action action, Direction direction, int worldHeight, int sequence) { if (this.player.getEyePosition().distanceToSqr(Vec3.atCenterOf(pos)) > ServerGamePacketListenerImpl.MAX_INTERACTION_DISTANCE) { + if (true) return; // Paper - Don't allow digging into unloaded chunks; Don't notify if unreasonably far away this.debugLogging(pos, false, sequence, "too far"); } else if (pos.getY() >= worldHeight) { this.player.connection.send(new ClientboundBlockUpdatePacket(pos, this.level.getBlockState(pos))); @@ -299,10 +306,12 @@ public class ServerPlayerGameMode { this.debugLogging(pos, true, sequence, "stopped destroying"); } else if (action == ServerboundPlayerActionPacket.Action.ABORT_DESTROY_BLOCK) { this.isDestroyingBlock = false; - if (!Objects.equals(this.destroyPos, pos)) { + if (!Objects.equals(this.destroyPos, pos) && !BlockPos.ZERO.equals(this.destroyPos)) { // Paper ServerPlayerGameMode.LOGGER.debug("Mismatch in destroy block pos: {} {}", this.destroyPos, pos); // CraftBukkit - SPIGOT-5457 sent by client when interact event cancelled - this.level.destroyBlockProgress(this.player.getId(), this.destroyPos, -1); - this.debugLogging(pos, true, sequence, "aborted mismatched destroying"); + BlockState type = this.level.getBlockStateIfLoaded(this.destroyPos); // Paper - don't load unloaded chunks for stale records here + if (type != null) this.level.destroyBlockProgress(this.player.getId(), this.destroyPos, -1); + if (type != null) this.debugLogging(pos, true, sequence, "aborted mismatched destroying"); + this.destroyPos = BlockPos.ZERO; // Paper } this.level.destroyBlockProgress(this.player.getId(), pos, -1); diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java index 0d9251ceb351b7d763420c49b0bf487907c42c55..358b6b493af3fcc52b274ccc43a18187b505e1f0 100644 --- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java +++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java @@ -1590,6 +1590,12 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl case START_DESTROY_BLOCK: case ABORT_DESTROY_BLOCK: case STOP_DESTROY_BLOCK: + // Paper start - Don't allow digging into unloaded chunks + if (this.player.level().getChunkIfLoadedImmediately(blockposition.getX() >> 4, blockposition.getZ() >> 4) == null) { + this.player.connection.ackBlockChangesUpTo(packet.getSequence()); + return; + } + // Paper end - Don't allow digging into unloaded chunks this.player.gameMode.handleBlockBreakAction(blockposition, packetplayinblockdig_enumplayerdigtype, packet.getDirection(), this.player.level().getMaxBuildHeight(), packet.getSequence()); this.player.connection.ackBlockChangesUpTo(packet.getSequence()); return;