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https://github.com/PaperMC/Paper.git
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d385af0e01
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: 0a4b84d6 SPIGOT-7003: Add missing PlayerAnimationType 830db7d5 SPIGOT-5984: Add non deprecated / magic value way to set pixel in MapCanvas 20caf8ff PR-754: Add DamageCause.SONIC_BOOM CraftBukkit Changes: 576a03704 SPIGOT-7003: Add missing PlayerAnimationType 0dcc5fdd0 SPIGOT-5984: Add non deprecated / magic value way to set pixel in MapCanvas d75aacb43 Update Netty version 3b34c6bea SPIGOT-7044: Modified RandomSourceWrapper to ensure random is not null before setting seed 4b60bfd18 PR-1059: Add DamageCause.SONIC_BOOM
57 lines
3.2 KiB
Diff
57 lines
3.2 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/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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index c3d5fc95d4faa3dce9670d84c7057fa92170010d..5384fe5c20141d1581ed31420b95d2b148e38d3e 100644
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -276,6 +276,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
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private final ChatPreviewThrottler chatPreviewThrottler = new ChatPreviewThrottler();
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private final AtomicReference<Instant> lastChatTimeStamp;
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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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+ private static final int MAX_SIGN_LINE_LENGTH = Integer.getInteger("Paper.maxSignLength", 80); // Paper
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public ServerGamePacketListenerImpl(MinecraftServer server, Connection connection, ServerPlayer player) {
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this.lastChatTimeStamp = new AtomicReference(Instant.EPOCH);
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@@ -3047,7 +3048,19 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
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@Override
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public void handleSignUpdate(ServerboundSignUpdatePacket packet) {
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- List<String> list = (List) Stream.of(packet.getLines()).map(ChatFormatting::stripFormatting).collect(Collectors.toList());
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+ // Paper start - cap line length - modified clients can send longer data than normal
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+ String[] lines = packet.getLines();
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+ for (int i = 0; i < lines.length; ++i) {
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+ if (MAX_SIGN_LINE_LENGTH > 0 && lines[i].length() > MAX_SIGN_LINE_LENGTH) {
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+ // This handles multibyte characters as 1
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+ int offset = lines[i].codePoints().limit(MAX_SIGN_LINE_LENGTH).map(Character::charCount).sum();
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+ if (offset < lines[i].length()) {
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+ lines[i] = lines[i].substring(0, offset); // this will break any filtering, but filtering is NYI as of 1.17
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+ }
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+ }
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+ }
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+ List<String> list = (List) Stream.of(lines).map(ChatFormatting::stripFormatting).collect(Collectors.toList());
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+ // Paper end
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this.filterTextPacket(list, (list1) -> {
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this.updateSignText(packet, list1);
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