PaperMC/patches/server/0308-Limit-Client-Sign-length-more.patch
Nassim Jahnke 17f71ac87b
Updated Upstream (Bukkit/CraftBukkit/Spigot) (#5904)
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
70d24eb8 SPIGOT-6587: Update documentation/error of drop chance API

CraftBukkit Changes:
470050ad SPIGOT-6587: Update documentation/error of drop chance API
1c39efa3 Fix Inventory#getViewers on the player inventory not returning the player first time their inventory is opened
d161627d Fix PrepareItemCraftEvent#isRepair
aa1fae73 SPIGOT-6586: EntityChangeBlockEvent for falling block does not cancel properly
8a04072e SPIGOT-6583: Throwing eggs doesn't make sounds

Spigot Changes:
f773da84 Remove redundant patch
cd367234 Rebuild patches
2021-06-20 21:25:59 +02:00

58 lines
3.7 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 27 Feb 2019 22:18:40 -0500
Subject: [PATCH] Limit Client Sign length more
modified clients can send more data from the client
to the server and it would get stored on the sign as sent.
Mojang has a limit of 384 which is much higher than reasonable.
the client can barely render around 16 characters as-is, but formatting
codes can get it to be more than 16 actual length.
Set a limit of 80 which should give an average of 16 characters 2
sets of legacy formatting codes which should be plenty for all uses.
This does not strip any existing data from the NBT as plugins
may use this for storing data out of the rendered area.
it only impacts data sent from the client.
Set -DPaper.maxSignLength=XX to change limit or -1 to disable
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 649db78f7f1e2269d46c856aff95449d5ca6114a..569528a80fdb54cb461f71f712db1e22286f155e 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -255,6 +255,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
private int aboveGroundVehicleTickCount;
private int receivedMovePacketCount;
private int knownMovePacketCount;
+ private static final int MAX_SIGN_LINE_LENGTH = Integer.getInteger("Paper.maxSignLength", 80);
private static final long KEEPALIVE_LIMIT = Long.getLong("paper.playerconnection.keepalive", 30) * 1000; // Paper - provide property to set keepalive limit
public ServerGamePacketListenerImpl(MinecraftServer server, Connection connection, ServerPlayer player) {
@@ -2866,10 +2867,20 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
List<net.kyori.adventure.text.Component> lines = new java.util.ArrayList<>();
for (int i = 0; i < list.size(); ++i) {
+ // Paper start - cap line length - modified clients can send longer data than normal
+ net.minecraft.server.network.TextFilter.FilteredText currentLine = list.get(i);
+ if (MAX_SIGN_LINE_LENGTH > 0 && currentLine.getRaw().length() > MAX_SIGN_LINE_LENGTH) {
+ // This handles multibyte characters as 1
+ int offset = currentLine.getRaw().codePoints().limit(MAX_SIGN_LINE_LENGTH).map(Character::charCount).sum();
+ if (offset < currentLine.getRaw().length()) {
+ list.set(i, currentLine = net.minecraft.server.network.TextFilter.FilteredText.passThrough(currentLine.getRaw().substring(0, offset))); // this will break any filtering, but filtering is NYI as of 1.17
+ }
+ }
+ // Paper end
if (this.player.isTextFilteringEnabled()) {
- lines.add(net.kyori.adventure.text.Component.text(SharedConstants.filterText(list.get(i).getFiltered())));
+ lines.add(net.kyori.adventure.text.Component.text(SharedConstants.filterText(currentLine.getFiltered())));
} else {
- lines.add(net.kyori.adventure.text.Component.text(SharedConstants.filterText(list.get(i).getRaw())));
+ lines.add(net.kyori.adventure.text.Component.text(SharedConstants.filterText(currentLine.getRaw())));
}
}
SignChangeEvent event = new SignChangeEvent((org.bukkit.craftbukkit.block.CraftBlock) player.getWorld().getBlockAt(x, y, z), this.player.getBukkitEntity(), lines);