76 lines
3.8 KiB
Diff
76 lines
3.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Aikar <aikar@aikar.co>
|
|
Date: Fri, 16 Nov 2018 23:08:50 -0500
|
|
Subject: [PATCH] Book Size Limits
|
|
|
|
Puts some limits on the size of books.
|
|
|
|
diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
|
|
index 36719c689a24c63e7d9a5b40f8c262c182a31b21..83bf428abd3be89e34cf42638bd1357a708ea0e3 100644
|
|
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
|
|
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
|
|
@@ -369,6 +369,13 @@ public class PaperConfig {
|
|
}
|
|
}
|
|
|
|
+ public static int maxBookPageSize = 2560;
|
|
+ public static double maxBookTotalSizeMultiplier = 0.98D;
|
|
+ private static void maxBookSize() {
|
|
+ maxBookPageSize = Math.min(8192, getInt("settings.book-size.page-max", maxBookPageSize));
|
|
+ maxBookTotalSizeMultiplier = getDouble("settings.book-size.total-multiplier", maxBookTotalSizeMultiplier);
|
|
+ }
|
|
+
|
|
public static boolean asyncChunks = false;
|
|
private static void asyncChunks() {
|
|
ConfigurationSection section;
|
|
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
|
|
index 95561ebe675957a9553ef0802c701ab0385dfbec..934c59f0f65b3751f74dab17b9f730d333d7a0fb 100644
|
|
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
|
|
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
|
|
@@ -1016,6 +1016,45 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
|
|
|
|
@Override
|
|
public void handleEditBook(ServerboundEditBookPacket packet) {
|
|
+ // Paper start
|
|
+ if (!this.cserver.isPrimaryThread()) {
|
|
+ List<String> pageList = packet.getPages();
|
|
+ long byteTotal = 0;
|
|
+ int maxBookPageSize = com.destroystokyo.paper.PaperConfig.maxBookPageSize;
|
|
+ double multiplier = Math.max(0.3D, Math.min(1D, com.destroystokyo.paper.PaperConfig.maxBookTotalSizeMultiplier));
|
|
+ long byteAllowed = maxBookPageSize;
|
|
+ for (String testString : pageList) {
|
|
+ int byteLength = testString.getBytes(java.nio.charset.StandardCharsets.UTF_8).length;
|
|
+ if (byteLength > 256 * 4) {
|
|
+ ServerGamePacketListenerImpl.LOGGER.warn(this.player.getScoreboardName() + " tried to send a book with with a page too large!");
|
|
+ server.scheduleOnMain(() -> this.disconnect("Book too large!"));
|
|
+ return;
|
|
+ }
|
|
+ byteTotal += byteLength;
|
|
+ int length = testString.length();
|
|
+ int multibytes = 0;
|
|
+ if (byteLength != length) {
|
|
+ for (char c : testString.toCharArray()) {
|
|
+ if (c > 127) {
|
|
+ multibytes++;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ byteAllowed += (maxBookPageSize * Math.min(1, Math.max(0.1D, (double) length / 255D))) * multiplier;
|
|
+
|
|
+ if (multibytes > 1) {
|
|
+ // penalize MB
|
|
+ byteAllowed -= multibytes;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (byteTotal > byteAllowed) {
|
|
+ ServerGamePacketListenerImpl.LOGGER.warn(this.player.getScoreboardName() + " tried to send too large of a book. Book Size: " + byteTotal + " - Allowed: "+ byteAllowed + " - Pages: " + pageList.size());
|
|
+ server.scheduleOnMain(() -> this.disconnect("Book too large!"));
|
|
+ return;
|
|
+ }
|
|
+ }
|
|
+ // Paper end
|
|
// CraftBukkit start
|
|
if (this.lastBookTick + 20 > MinecraftServer.currentTick) {
|
|
this.disconnect("Book edited too quickly!");
|