9dc4d6448b
While it wasn't really "broken" before, if plugins use NMS (which they really should't be) and mess with entity management themselves, and get it wrong, they could ultimately corrupt our state expectations. I've been unable to reproduce any issues locally, but these changes are the result of me analyzing the code pretty deeply and seeing about how to make it more durable to abnormal usage. Any servers seeing oddities, please run with -Ddebug.entities=true and send me any logs triggered.
98 lines
5 KiB
Diff
98 lines
5 KiB
Diff
From 18f41cfab72d71ce18a876d612fdce823ced970f Mon Sep 17 00:00:00 2001
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From: Hugo Manrique <hugmanrique@gmail.com>
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Date: Mon, 23 Jul 2018 14:22:26 +0200
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Subject: [PATCH] Vanished players don't have rights
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diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
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index 6598b87eef..539273afbc 100644
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--- a/src/main/java/net/minecraft/server/Entity.java
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+++ b/src/main/java/net/minecraft/server/Entity.java
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@@ -92,7 +92,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
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private static int entityCount;
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private final EntityTypes<?> g; public EntityTypes<?> getEntityType() { return g; } // Paper - OBFHELPER
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private int id;
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- public boolean j;
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+ public boolean j; public boolean blocksEntitySpawning() { return j; } // Paper - OBFHELPER
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public final List<Entity> passengers;
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protected int k;
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private Entity vehicle;
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diff --git a/src/main/java/net/minecraft/server/ItemBlock.java b/src/main/java/net/minecraft/server/ItemBlock.java
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index f27d565e1e..49ad201c6e 100644
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--- a/src/main/java/net/minecraft/server/ItemBlock.java
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+++ b/src/main/java/net/minecraft/server/ItemBlock.java
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@@ -70,7 +70,8 @@ public class ItemBlock extends Item {
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protected boolean b(BlockActionContext blockactioncontext, IBlockData iblockdata) {
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// CraftBukkit start - store default return
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- boolean defaultReturn = iblockdata.canPlace(blockactioncontext.getWorld(), blockactioncontext.getClickPosition()) && blockactioncontext.getWorld().a(iblockdata, blockactioncontext.getClickPosition());
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+ final World world = blockactioncontext.getWorld(); // Paper
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+ boolean defaultReturn = iblockdata.canPlace(world, blockactioncontext.getClickPosition()) && world.a(iblockdata, blockactioncontext.getClickPosition()) && world.checkNoVisiblePlayerCollisions(blockactioncontext.getEntity(), iblockdata.getCollisionShape(world, blockactioncontext.getClickPosition())); // Paper - Use our entity search
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org.bukkit.entity.Player player = (blockactioncontext.getEntity() instanceof EntityPlayer) ? (org.bukkit.entity.Player) blockactioncontext.getEntity().getBukkitEntity() : null;
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BlockCanBuildEvent event = new BlockCanBuildEvent(CraftBlock.at(blockactioncontext.getWorld(), blockactioncontext.getClickPosition()), player, CraftBlockData.fromData(iblockdata), defaultReturn);
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diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
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index 28fca165cd..1929e9d2ae 100644
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--- a/src/main/java/net/minecraft/server/World.java
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+++ b/src/main/java/net/minecraft/server/World.java
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@@ -1521,6 +1521,37 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
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}
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}
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+ // Paper start - Based on method below
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+ /**
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+ * @param entity causing the action ex. block placer
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+ * @param voxelshape area to search within
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+ * @return if there are no visible players colliding
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+ */
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+ public boolean checkNoVisiblePlayerCollisions(@Nullable Entity entity, VoxelShape voxelshape) {
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+ if (voxelshape.isEmpty()) {
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+ return true;
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+ } else {
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+ List list = this.getEntities((Entity) null, voxelshape.getBoundingBox());
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+
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+ for (int i = 0; i < list.size(); ++i) {
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+ Entity entity1 = (Entity) list.get(i);
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+
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+ if (entity instanceof EntityPlayer && entity1 instanceof EntityPlayer) {
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+ if (!((EntityPlayer) entity).getBukkitEntity().canSee(((EntityPlayer) entity1).getBukkitEntity())) {
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+ continue;
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+ }
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+ }
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+
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+ if (!entity1.dead && entity1.blocksEntitySpawning()) {
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+ return false;
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+ }
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+ }
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+
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+ return true;
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+ }
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+ }
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+ // Paper end
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+
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public boolean a(@Nullable Entity entity, VoxelShape voxelshape) {
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if (voxelshape.isEmpty()) {
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return true;
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diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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index 2cfe8afe13..0a3a121cbc 100644
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--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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@@ -1000,6 +1000,14 @@ public class CraftEventFactory {
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Projectile projectile = (Projectile) entity.getBukkitEntity();
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org.bukkit.entity.Entity collided = position.entity.getBukkitEntity();
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com.destroystokyo.paper.event.entity.ProjectileCollideEvent event = new com.destroystokyo.paper.event.entity.ProjectileCollideEvent(projectile, collided);
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+
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+ if (projectile.getShooter() instanceof Player && collided instanceof Player) {
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+ if (!((Player) projectile.getShooter()).canSee((Player) collided)) {
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+ event.setCancelled(true);
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+ return event;
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+ }
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+ }
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+
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Bukkit.getPluginManager().callEvent(event);
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return event;
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}
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--
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2.21.0
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