geforkt von Mirrors/Paper
57 Zeilen
3.0 KiB
Diff
57 Zeilen
3.0 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: Fri, 16 Nov 2018 23:08:50 -0500
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Subject: [PATCH] Book size limits
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Puts some limits on the size of books.
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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 c3e281754a1cd9d5ce5f4aab36822f9f5d34be39..542899c382309986f3aaa16bf534b677aaac82f5 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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@@ -1056,6 +1056,44 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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@Override
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public void handleEditBook(ServerboundEditBookPacket packet) {
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+ // Paper start - Book size limits
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+ final io.papermc.paper.configuration.type.number.IntOr.Disabled pageMax = io.papermc.paper.configuration.GlobalConfiguration.get().itemValidation.bookSize.pageMax;
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+ if (!this.cserver.isPrimaryThread() && pageMax.enabled()) {
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+ final List<String> pageList = packet.pages();
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+ long byteTotal = 0;
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+ final int maxBookPageSize = pageMax.intValue();
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+ final double multiplier = Math.clamp(io.papermc.paper.configuration.GlobalConfiguration.get().itemValidation.bookSize.totalMultiplier, 0.3D, 1D);
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+ long byteAllowed = maxBookPageSize;
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+ for (final String page : pageList) {
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+ final int byteLength = page.getBytes(java.nio.charset.StandardCharsets.UTF_8).length;
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+ byteTotal += byteLength;
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+ final int length = page.length();
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+ int multiByteCharacters = 0;
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+ if (byteLength != length) {
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+ // Count the number of multi byte characters
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+ for (final char c : page.toCharArray()) {
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+ if (c > 127) {
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+ multiByteCharacters++;
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+ }
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+ }
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+ }
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+
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+ // Allow pages with fewer characters to consume less of the allowed byte quota
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+ byteAllowed += maxBookPageSize * Math.clamp((double) length / 255D, 0.1D, 1) * multiplier;
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+
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+ if (multiByteCharacters > 1) {
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+ // Penalize multibyte characters
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+ byteAllowed -= multiByteCharacters;
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+ }
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+ }
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+
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+ if (byteTotal > byteAllowed) {
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+ ServerGamePacketListenerImpl.LOGGER.warn("{} tried to send a book too large. Book size: {} - Allowed: {} - Pages: {}", this.player.getScoreboardName(), byteTotal, byteAllowed, pageList.size());
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+ this.disconnect(Component.literal("Book too large!"));
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+ return;
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+ }
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+ }
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+ // Paper end - Book size limits
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// CraftBukkit start
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if (this.lastBookTick + 20 > MinecraftServer.currentTick) {
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this.disconnect(Component.literal("Book edited too quickly!"));
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