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4bc15f13aa
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: e2160a18 Make MapCursor#type not depends on deprecated values CraftBukkit Changes: 6ce172642 SPIGOT-7761: Ender pearl does not damage or spawn endermites f5a63f734 SPIGOT-7759: Chunk not there when requested in ChunkUnloadEvent 28287259c Remove unused import eb9a7dde0 SPIGOT-7757: Cannot set item in Stonecutter Inventory f8be9d752 Move deserialized removed unhandled tags to dedicated removedTags a7e576186 Fix potential mutability issue with CraftMetaItem copy constructor 995885452 SPIGOT-7741: Vanilla ItemComponent in commands can't remove components 9ef69aa0b PR-1284: Move ItemType <-> ItemMeta linking to a centralized place 3e82eafbe PR-1420: Fix DirectEntity and CausingEntity Damager for Creepers ignited by Player c23daa71f SPIGOT-7751: Fix crash caused by arrows from trial spawners Make MapCursor#type not depends on deprecated values SPIGOT-7761: Ender pearl does not damage or spawn endermites
57 lines
3.1 KiB
Diff
57 lines
3.1 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 9b255f9551fa66efa21944e284a40a03aefc3040..23f033e16e2210970e6b01672873670578f426f4 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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@@ -1043,6 +1043,45 @@ 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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+ if (!this.cserver.isPrimaryThread()) {
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+ List<String> pageList = packet.pages();
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+ long byteTotal = 0;
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+ int maxBookPageSize = io.papermc.paper.configuration.GlobalConfiguration.get().itemValidation.bookSize.pageMax;
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+ double multiplier = Math.max(0.3D, Math.min(1D, io.papermc.paper.configuration.GlobalConfiguration.get().itemValidation.bookSize.totalMultiplier));
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+ long byteAllowed = maxBookPageSize;
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+ for (String testString : pageList) {
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+ int byteLength = testString.getBytes(java.nio.charset.StandardCharsets.UTF_8).length;
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+ if (byteLength > 256 * 4) {
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+ ServerGamePacketListenerImpl.LOGGER.warn(this.player.getScoreboardName() + " tried to send a book with with a page too large!");
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+ server.scheduleOnMain(() -> this.disconnect(Component.literal("Book too large!")));
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+ return;
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+ }
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+ byteTotal += byteLength;
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+ int length = testString.length();
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+ int multibytes = 0;
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+ if (byteLength != length) {
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+ for (char c : testString.toCharArray()) {
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+ if (c > 127) {
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+ multibytes++;
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+ }
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+ }
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+ }
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+ byteAllowed += (maxBookPageSize * Math.min(1, Math.max(0.1D, (double) length / 255D))) * multiplier;
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+
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+ if (multibytes > 1) {
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+ // penalize MB
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+ byteAllowed -= multibytes;
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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(this.player.getScoreboardName() + " tried to send too large of a book. Book Size: " + byteTotal + " - Allowed: "+ byteAllowed + " - Pages: " + pageList.size());
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+ server.scheduleOnMain(() -> 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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