From 52a843bdcf3007d3a162688c19e81226dd77bf9e Mon Sep 17 00:00:00 2001 From: Sudzzy Date: Thu, 3 Mar 2016 02:50:31 -0600 Subject: [PATCH] Configurable inter-world teleportation safety People are able to abuse the way Bukkit handles teleportation across worlds since it provides a built in teleportation safety check. To abuse the safety check, players are required to get into a location deemed unsafe by Bukkit e.g. be within a chest or door block. While they are in this block, they accept a teleport request from a player within a different world. Once the player teleports, Minecraft will recursively search upwards for a safe location, this could eventually land within a player's skybase. Example setup to perform the glitch: http://puu.sh/ng3PC/cf072dcbdb.png The wanted destination was on top of the emerald block however the player ended on top of the diamond block. This only is the case if the player is teleporting between worlds. diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java index 38ccabc0d..b241c0380 100644 --- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java @@ -237,4 +237,9 @@ public class PaperWorldConfig { private void portalSearchRadius() { portalSearchRadius = getInt("portal-search-radius", 128); } + + public boolean disableTeleportationSuffocationCheck; + private void disableTeleportationSuffocationCheck() { + disableTeleportationSuffocationCheck = getBoolean("disable-teleportation-suffocation-check", false); + } } diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java index 536534d2e..bf7aaebd6 100644 --- a/src/main/java/net/minecraft/server/PlayerList.java +++ b/src/main/java/net/minecraft/server/PlayerList.java @@ -799,7 +799,7 @@ public abstract class PlayerList { exitWorld.getTravelAgent().adjustExit(entityplayer, exit, velocity); entityplayer.worldChangeInvuln = true; // CraftBukkit - Set teleport invulnerability only if player changing worlds - this.moveToWorld(entityplayer, exitWorld.dimension, true, exit, true); // SPIGOT-3864 + this.moveToWorld(entityplayer, exitWorld.dimension, true, exit, !exitWorld.paperConfig.disableTeleportationSuffocationCheck); // SPIGOT-3864 // Paper GH-1149 - Tie suffocation check to config option if (entityplayer.motX != velocity.getX() || entityplayer.motY != velocity.getY() || entityplayer.motZ != velocity.getZ()) { entityplayer.getBukkitEntity().setVelocity(velocity); } diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java index c14100ac6..6a43f5674 100644 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java @@ -614,7 +614,8 @@ public class CraftPlayer extends CraftHumanEntity implements Player { if (fromWorld == toWorld) { entity.playerConnection.teleport(to); } else { - server.getHandle().moveToWorld(entity, toWorld.dimension, true, to, true); + // Paper - Configurable suffocation check + server.getHandle().moveToWorld(entity, toWorld.dimension, true, to, !toWorld.paperConfig.disableTeleportationSuffocationCheck); } return true; } -- 2.17.1