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This commit is contained in:
Jason Penilla
2021-06-12 23:48:25 -07:00
parent c7ea12688f
commit 9a7acfee26
25 changed files with 245 additions and 464 deletions
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108
patches/server/Call-player-spectator-target-events-and-improve-impl.patch Normal file
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@@ -0,0 +1,108 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Caleb Bassham <caleb.bassham@gmail.com>
Date: Fri, 28 Sep 2018 02:32:19 -0500
Subject: [PATCH] Call player spectator target events and improve
implementation
Use a proper teleport for teleporting to entities in different
worlds.
Implementation improvements authored by Spottedleaf <Spottedleaf@users.noreply.github.com>
Validate that the target entity is valid and deny spectate
requests from frozen players.
Also, make sure the entity is spawned to the client before
sending the camera packet. If the entity isn't spawned clientside
when it receives the camera packet, then the client will not
spectate the target entity.
Co-authored-by: Spottedleaf <Spottedleaf@users.noreply.github.com>
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -0,0 +0,0 @@ public class ServerPlayer extends Player {
}
public void setCamera(Entity entity) {
+ // Paper start - Add PlayerStartSpectatingEntityEvent and PlayerStopSpectatingEntity Event and improve implementation
Entity entity1 = this.getCamera();
- this.camera = (Entity) (entity == null ? this : entity);
- if (entity1 != this.camera) {
- this.connection.send(new ClientboundSetCameraPacket(this.camera));
- this.connection.b(this.camera.getX(), this.camera.getY(), this.camera.getZ(), this.getYRot(), this.getXRot(), TeleportCause.SPECTATE); // CraftBukkit
+ if (entity == null) {
+ entity = this;
}
+ if (entity1 == entity) return; // new spec target is the current spec target
+
+ if (entity == this) {
+ com.destroystokyo.paper.event.player.PlayerStopSpectatingEntityEvent playerStopSpectatingEntityEvent = new com.destroystokyo.paper.event.player.PlayerStopSpectatingEntityEvent(this.getBukkitEntity(), entity1.getBukkitEntity());
+
+ if (!playerStopSpectatingEntityEvent.callEvent()) {
+ return;
+ }
+ } else {
+ com.destroystokyo.paper.event.player.PlayerStartSpectatingEntityEvent playerStartSpectatingEntityEvent = new com.destroystokyo.paper.event.player.PlayerStartSpectatingEntityEvent(this.getBukkitEntity(), entity1.getBukkitEntity(), entity.getBukkitEntity());
+
+ if (!playerStartSpectatingEntityEvent.callEvent()) {
+ return;
+ }
+ }
+ // Validate
+ if (entity != this) {
+ if (entity.isRemoved() || !entity.valid || entity.level == null) {
+ MinecraftServer.LOGGER.info("Blocking player " + this.toString() + " from spectating invalid entity " + entity.toString());
+ return;
+ }
+ if (this.isImmobile()) {
+ // use debug: clients might maliciously spam this
+ MinecraftServer.LOGGER.debug("Blocking frozen player " + this.toString() + " from spectating entity " + entity.toString());
+ return;
+ }
+ }
+
+ this.camera = entity; // only set after validating state
+
+ if (entity != this) {
+ // Make sure we're in the right place
+ this.ejectPassengers(); // teleport can fail if we have passengers...
+ this.getBukkitEntity().teleport(new Location(entity.getCommandSenderWorld().getWorld(), entity.getX(), entity.getY(), entity.getZ(), this.getYRot(), this.getXRot()), TeleportCause.SPECTATE); // Correctly handle cross-world entities from api calls by using CB teleport
+
+ // Make sure we're tracking the entity before sending
+ ChunkMap.TrackedEntity tracker = ((ServerLevel)entity.level).getChunkSource().chunkMap.entityMap.get(entity.getId());
+ if (tracker != null) { // dumb plugins...
+ tracker.updatePlayer(this);
+ }
+ } else {
+ this.connection.teleport(this.camera.getX(), this.camera.getY(), this.camera.getZ(), this.getYRot(), this.getXRot(), TeleportCause.SPECTATE); // CraftBukkit
+ }
+ this.connection.send(new ClientboundSetCameraPacket(entity));
+ // Paper end
}
@Override
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -0,0 +0,0 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
}
}
- private void a(List<TextFilter.FilteredText> list, UnaryOperator<String> unaryoperator, ItemStack itemstack, int slot, ItemStack old) { // CraftBukkit
+ public void a(List<TextFilter.FilteredText> list, UnaryOperator<String> unaryoperator, ItemStack itemstack, int slot, ItemStack old) { // CraftBukkit // Paper - make public
ListTag nbttaglist = new ListTag();
if (this.player.isTextFilteringEnabled()) {
@@ -0,0 +0,0 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
this.a(x, y, z, yaw, pitch, PlayerTeleportEvent.TeleportCause.UNKNOWN);
}
+ public final void teleport(double d0, double d1, double d2, float f, float f1, PlayerTeleportEvent.TeleportCause cause) { this.a(d0, d1, d2, f, f1, cause); } // Paper - OBFHELPER
public void a(double d0, double d1, double d2, float f, float f1, PlayerTeleportEvent.TeleportCause cause) {
this.a(d0, d1, d2, f, f1, Collections.emptySet(), true, cause);
}