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57dd397155
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: b999860d SPIGOT-2304: Add LootGenerateEvent CraftBukkit Changes:77fd87e4SPIGOT-2304: Implement LootGenerateEventa1a705eeSPIGOT-5566: Doused campfires & fires should call EntityChangeBlockEvent41712eddSPIGOT-5707: PersistentDataHolder not Persistent on API dropped Item
82 lines
3.7 KiB
Diff
82 lines
3.7 KiB
Diff
From 40477e339f434baa1e125be7c40d8006db4bcd4e 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/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
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index 79cf4e598f..6d069c73d0 100644
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--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
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+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
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@@ -354,4 +354,11 @@ public class PaperConfig {
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velocitySecretKey = secret.getBytes(StandardCharsets.UTF_8);
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}
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}
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+
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+ public static int maxBookPageSize = 2560;
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+ public static double maxBookTotalSizeMultiplier = 0.98D;
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+ private static void maxBookSize() {
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+ maxBookPageSize = getInt("settings.book-size.page-max", maxBookPageSize);
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+ maxBookTotalSizeMultiplier = getDouble("settings.book-size.total-multiplier", maxBookTotalSizeMultiplier);
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+ }
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}
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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 b21fca9e5c..784f0a3f22 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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@@ -14,6 +14,7 @@ import java.util.Iterator;
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import java.util.Optional;
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import java.util.Set;
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import javax.annotation.Nullable;
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+import org.apache.commons.lang3.StringEscapeUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.logging.log4j.LogManager;
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import org.apache.logging.log4j.Logger;
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@@ -795,6 +796,42 @@ public class PlayerConnection implements PacketListenerPlayIn {
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@Override
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public void a(PacketPlayInBEdit packetplayinbedit) {
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+ // Paper start
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+ ItemStack testStack = packetplayinbedit.b();
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+ if (!server.isPrimaryThread() && !testStack.isEmpty() && testStack.getTag() != null) {
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+ NBTTagList pageList = testStack.getTag().getList("pages", 8);
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+ long byteTotal = 0;
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+ int maxBookPageSize = com.destroystokyo.paper.PaperConfig.maxBookPageSize;
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+ double multiplier = Math.max(0.3D, Math.min(1D, com.destroystokyo.paper.PaperConfig.maxBookTotalSizeMultiplier));
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+ long byteAllowed = maxBookPageSize;
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+ for (int i = 0; i < pageList.size(); ++i) {
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+ String testString = pageList.getString(i);
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+ int byteLength = testString.getBytes(java.nio.charset.StandardCharsets.UTF_8).length;
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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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+ PlayerConnection.LOGGER.warn(this.player.getName() + " tried to send too large of a book. Book Size: " + byteTotal + " - Allowed: "+ byteAllowed + " - Pages: " + pageList.size());
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+ minecraftServer.scheduleOnMain(() -> this.disconnect("Book too large!"));
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+ return;
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+ }
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+ }
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+ // Paper end
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PlayerConnectionUtils.ensureMainThread(packetplayinbedit, this, this.player.getWorldServer());
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// CraftBukkit start
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if (this.lastBookTick + 20 > MinecraftServer.currentTick) {
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--
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2.26.2
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