ab347c4c96
Upstream has released updates that appears 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: 42d5a714 SPIGOT-5899: Hoglins API similar to Piglins 2c1ee10e SPIGOT-5887: ClickType doesn't include off hand swaps 5ff7c7ce SPIGOT-5886: Missing BlockData CraftBukkit Changes: 7560f5f5 SPIGOT-5905: Fix hex colours not being allowed in MOTD d47c47ee SPIGOT-5889: Villager using composter should call EntityChangeBlockEvent 2fe6b4a3 SPIGOT-5899: Hoglins API similar to Piglins e09dbeca SPIGOT-5887: ClickType doesn't include off hand swaps 23aac2a5 SPIGOT-5903: EntityDismountEvent cannot be triggered asynchronously 92cbf656 SPIGOT-5884: Tab completions lost on reloadData / minecraft:reload fb4e54ad SPIGOT-5902: PlayerRespawnEvent places player at spawn before event is called aa8f3d5a SPIGOT-5901: Structures are generated in all worlds based on the setting for the main world a0c35937 SPIGOT-5895: PlayerChangedWorldEvent#getFrom is incorrect 89c0a5c3 SPIGOT-5886: Missing BlockData Spigot Changes: 0287a20d SPIGOT-5903: EntityDismountEvent cannot be triggered asynchronously
52 lines
2.8 KiB
Diff
52 lines
2.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Wed, 27 Feb 2019 22:18:40 -0500
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Subject: [PATCH] Limit Client Sign length more
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modified clients can send more data from the client
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to the server and it would get stored on the sign as sent.
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Mojang has a limit of 384 which is much higher than reasonable.
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the client can barely render around 16 characters as-is, but formatting
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codes can get it to be more than 16 actual length.
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Set a limit of 80 which should give an average of 16 characters 2
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sets of legacy formatting codes which should be plenty for all uses.
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This does not strip any existing data from the NBT as plugins
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may use this for storing data out of the rendered area.
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it only impacts data sent from the client.
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Set -DPaper.maxSignLength=XX to change limit or -1 to disable
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diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
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index 1c843fb1f877855117b5e20bdc0d040da1752295..0aac20a6a1e72f0528532edb9421b89e8461e23e 100644
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--- a/src/main/java/net/minecraft/server/PlayerConnection.java
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+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
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@@ -103,6 +103,7 @@ public class PlayerConnection implements PacketListenerPlayIn {
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private int E;
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private int receivedMovePackets;
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private int processedMovePackets;
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+ private static final int MAX_SIGN_LINE_LENGTH = Integer.getInteger("Paper.maxSignLength", 80);
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private static final long KEEPALIVE_LIMIT = Long.getLong("paper.playerconnection.keepalive", 30) * 1000; // Paper - provide property to set keepalive limit
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public PlayerConnection(MinecraftServer minecraftserver, NetworkManager networkmanager, EntityPlayer entityplayer) {
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@@ -2603,6 +2604,15 @@ public class PlayerConnection implements PacketListenerPlayIn {
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String[] lines = new String[4];
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for (int i = 0; i < astring.length; ++i) {
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+ // Paper start - cap line length - modified clients can send longer data than normal
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+ if (MAX_SIGN_LINE_LENGTH > 0 && astring[i].length() > MAX_SIGN_LINE_LENGTH) {
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+ // This handles multibyte characters as 1
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+ int offset = astring[i].codePoints().limit(MAX_SIGN_LINE_LENGTH).map(Character::charCount).sum();
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+ if (offset < astring[i].length()) {
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+ astring[i] = astring[i].substring(0, offset);
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+ }
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+ }
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+ // Paper end
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lines[i] = SharedConstants.a(astring[i]); //Paper - Replaced with anvil color stripping method to stop exploits that allow colored signs to be created.
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}
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SignChangeEvent event = new SignChangeEvent((org.bukkit.craftbukkit.block.CraftBlock) player.getWorld().getBlockAt(x, y, z), this.server.getPlayer(this.player), lines);
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