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Note to other developers: This commit may require you to wipe your workspace as a result of the changes to BD. --- work/BuildData Submodule work/BuildData f527a8ff..d56672db: > Mappings Update --- work/Bukkit Submodule work/Bukkit 0c1d258bb..db06c80d7: > Add list of entities to EntityTransformEvent > SPIGOT-4347: Add API to allow storing arbitrary values on ItemStacks ---work/CraftBukkit Submodule work/CraftBukkit 6a398ac44..068dab5be: > Enable optional source JAR shading via profile shadeSourcesJar > Use ImmutableList rather than AbstractList for CraftMetaBook > Fix setRecipes(List) not setting Knowledge Book recipes. > Mappings Update > Add list of entities to EntityTransformEvent & move die calls > SPIGOT-4347: Add API to allow storing arbitrary values on ItemStacks > Add Vanilla help to default permissions --- work/Spigot Submodule work/Spigot a1f2566f6..e769fe4d9: > Mappings Update > Rebuild patches
70 lines
3.4 KiB
Diff
70 lines
3.4 KiB
Diff
From 7e63bbbab3ac2aeeb7e598d9b036544f2541933f 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 bc74ea2f0..beec4e33c 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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@@ -458,4 +458,11 @@ 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 bb4498e0f..a9ef84d0e 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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@@ -748,6 +748,38 @@ public class PlayerConnection implements PacketListenerPlayIn, ITickable {
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}
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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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+ 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.postToMainThread(() -> this.disconnect("Book too large!"));
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+ return;
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+ }
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+ int length = testString.length();
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+ int multibytes = byteLength == length ? byteLength : (int) Math.round((double) byteLength / (double) length);
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+ for (int x = 1; x < multibytes; x++) {
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+ multiplier *= multiplier;
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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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+ multiplier *= multiplier;
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+
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+ if (multibytes > 1) {
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+ // penalize MB some more
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+ byteAllowed -= length;
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+ }
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+ }
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+ }
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+ // Paper end
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// CraftBukkit start
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PlayerConnectionUtils.ensureMainThread(packetplayinbedit, this, this.player.getWorldServer());
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if (this.lastBookTick + 20 > MinecraftServer.currentTick) {
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--
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2.19.2
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