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e4d10a6d67
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: 122289ff Add FaceAttachable interface to handle Grindstone facing in common with Switches a6db750e SPIGOT-5647: ZombieVillager entity should have getVillagerType() CraftBukkit Changes:bbe3d58eSPIGOT-5650: Lectern.setPage(int) causes a NullPointerException3075579fAdd FaceAttachable interface to handle Grindstone facing in common with Switches95bd4238SPIGOT-5647: ZombieVillager entity should have getVillagerType()4d975ac3SPIGOT-5617: setBlockData does not work when NotPlayEvent is called by redstone current
55 lines
2.8 KiB
Diff
55 lines
2.8 KiB
Diff
From 2a139e9bff6e0fade16b208fb980f5d81baf59b9 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 2c94ca6a8e..94d3d602cc 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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@@ -2562,6 +2563,15 @@ 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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--
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2.25.1
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