374 lines
13 KiB
Java
374 lines
13 KiB
Java
package com.hypixel.hytale.protocol.packets.assets;
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import com.hypixel.hytale.protocol.CraftingRecipe;
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import com.hypixel.hytale.protocol.Packet;
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import com.hypixel.hytale.protocol.UpdateType;
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import com.hypixel.hytale.protocol.io.PacketIO;
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import com.hypixel.hytale.protocol.io.ProtocolException;
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import com.hypixel.hytale.protocol.io.ValidationResult;
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import com.hypixel.hytale.protocol.io.VarInt;
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import io.netty.buffer.ByteBuf;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Objects;
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import java.util.Map.Entry;
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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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public class UpdateRecipes implements Packet {
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public static final int PACKET_ID = 60;
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public static final boolean IS_COMPRESSED = true;
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public static final int NULLABLE_BIT_FIELD_SIZE = 1;
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public static final int FIXED_BLOCK_SIZE = 2;
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public static final int VARIABLE_FIELD_COUNT = 2;
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public static final int VARIABLE_BLOCK_START = 10;
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public static final int MAX_SIZE = 1677721600;
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@Nonnull
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public UpdateType type = UpdateType.Init;
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@Nullable
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public Map<String, CraftingRecipe> recipes;
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@Nullable
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public String[] removedRecipes;
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@Override
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public int getId() {
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return 60;
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}
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public UpdateRecipes() {
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}
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public UpdateRecipes(@Nonnull UpdateType type, @Nullable Map<String, CraftingRecipe> recipes, @Nullable String[] removedRecipes) {
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this.type = type;
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this.recipes = recipes;
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this.removedRecipes = removedRecipes;
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}
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public UpdateRecipes(@Nonnull UpdateRecipes other) {
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this.type = other.type;
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this.recipes = other.recipes;
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this.removedRecipes = other.removedRecipes;
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}
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@Nonnull
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public static UpdateRecipes deserialize(@Nonnull ByteBuf buf, int offset) {
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UpdateRecipes obj = new UpdateRecipes();
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byte nullBits = buf.getByte(offset);
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obj.type = UpdateType.fromValue(buf.getByte(offset + 1));
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if ((nullBits & 1) != 0) {
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int varPos0 = offset + 10 + buf.getIntLE(offset + 2);
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int recipesCount = VarInt.peek(buf, varPos0);
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if (recipesCount < 0) {
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throw ProtocolException.negativeLength("Recipes", recipesCount);
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}
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if (recipesCount > 4096000) {
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throw ProtocolException.dictionaryTooLarge("Recipes", recipesCount, 4096000);
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}
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int varIntLen = VarInt.length(buf, varPos0);
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obj.recipes = new HashMap<>(recipesCount);
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int dictPos = varPos0 + varIntLen;
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for (int i = 0; i < recipesCount; i++) {
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int keyLen = VarInt.peek(buf, dictPos);
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if (keyLen < 0) {
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throw ProtocolException.negativeLength("key", keyLen);
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}
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if (keyLen > 4096000) {
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throw ProtocolException.stringTooLong("key", keyLen, 4096000);
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}
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int keyVarLen = VarInt.length(buf, dictPos);
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String key = PacketIO.readVarString(buf, dictPos);
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dictPos += keyVarLen + keyLen;
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CraftingRecipe val = CraftingRecipe.deserialize(buf, dictPos);
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dictPos += CraftingRecipe.computeBytesConsumed(buf, dictPos);
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if (obj.recipes.put(key, val) != null) {
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throw ProtocolException.duplicateKey("recipes", key);
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}
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}
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}
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if ((nullBits & 2) != 0) {
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int varPos1 = offset + 10 + buf.getIntLE(offset + 6);
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int removedRecipesCount = VarInt.peek(buf, varPos1);
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if (removedRecipesCount < 0) {
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throw ProtocolException.negativeLength("RemovedRecipes", removedRecipesCount);
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}
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if (removedRecipesCount > 4096000) {
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throw ProtocolException.arrayTooLong("RemovedRecipes", removedRecipesCount, 4096000);
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}
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int varIntLen = VarInt.length(buf, varPos1);
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if (varPos1 + varIntLen + removedRecipesCount * 1L > buf.readableBytes()) {
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throw ProtocolException.bufferTooSmall("RemovedRecipes", varPos1 + varIntLen + removedRecipesCount * 1, buf.readableBytes());
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}
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obj.removedRecipes = new String[removedRecipesCount];
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int elemPos = varPos1 + varIntLen;
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for (int i = 0; i < removedRecipesCount; i++) {
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int strLen = VarInt.peek(buf, elemPos);
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if (strLen < 0) {
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throw ProtocolException.negativeLength("removedRecipes[" + i + "]", strLen);
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}
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if (strLen > 4096000) {
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throw ProtocolException.stringTooLong("removedRecipes[" + i + "]", strLen, 4096000);
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}
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int strVarLen = VarInt.length(buf, elemPos);
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obj.removedRecipes[i] = PacketIO.readVarString(buf, elemPos);
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elemPos += strVarLen + strLen;
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}
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}
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return obj;
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}
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public static int computeBytesConsumed(@Nonnull ByteBuf buf, int offset) {
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byte nullBits = buf.getByte(offset);
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int maxEnd = 10;
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if ((nullBits & 1) != 0) {
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int fieldOffset0 = buf.getIntLE(offset + 2);
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int pos0 = offset + 10 + fieldOffset0;
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int dictLen = VarInt.peek(buf, pos0);
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pos0 += VarInt.length(buf, pos0);
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for (int i = 0; i < dictLen; i++) {
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int sl = VarInt.peek(buf, pos0);
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pos0 += VarInt.length(buf, pos0) + sl;
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pos0 += CraftingRecipe.computeBytesConsumed(buf, pos0);
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}
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if (pos0 - offset > maxEnd) {
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maxEnd = pos0 - offset;
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}
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}
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if ((nullBits & 2) != 0) {
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int fieldOffset1 = buf.getIntLE(offset + 6);
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int pos1 = offset + 10 + fieldOffset1;
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int arrLen = VarInt.peek(buf, pos1);
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pos1 += VarInt.length(buf, pos1);
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for (int i = 0; i < arrLen; i++) {
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int sl = VarInt.peek(buf, pos1);
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pos1 += VarInt.length(buf, pos1) + sl;
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}
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if (pos1 - offset > maxEnd) {
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maxEnd = pos1 - offset;
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}
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}
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return maxEnd;
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}
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@Override
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public void serialize(@Nonnull ByteBuf buf) {
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int startPos = buf.writerIndex();
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byte nullBits = 0;
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if (this.recipes != null) {
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nullBits = (byte)(nullBits | 1);
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}
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if (this.removedRecipes != null) {
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nullBits = (byte)(nullBits | 2);
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}
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buf.writeByte(nullBits);
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buf.writeByte(this.type.getValue());
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int recipesOffsetSlot = buf.writerIndex();
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buf.writeIntLE(0);
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int removedRecipesOffsetSlot = buf.writerIndex();
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buf.writeIntLE(0);
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int varBlockStart = buf.writerIndex();
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if (this.recipes != null) {
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buf.setIntLE(recipesOffsetSlot, buf.writerIndex() - varBlockStart);
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if (this.recipes.size() > 4096000) {
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throw ProtocolException.dictionaryTooLarge("Recipes", this.recipes.size(), 4096000);
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}
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VarInt.write(buf, this.recipes.size());
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for (Entry<String, CraftingRecipe> e : this.recipes.entrySet()) {
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PacketIO.writeVarString(buf, e.getKey(), 4096000);
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e.getValue().serialize(buf);
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}
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} else {
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buf.setIntLE(recipesOffsetSlot, -1);
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}
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if (this.removedRecipes != null) {
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buf.setIntLE(removedRecipesOffsetSlot, buf.writerIndex() - varBlockStart);
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if (this.removedRecipes.length > 4096000) {
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throw ProtocolException.arrayTooLong("RemovedRecipes", this.removedRecipes.length, 4096000);
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}
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VarInt.write(buf, this.removedRecipes.length);
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for (String item : this.removedRecipes) {
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PacketIO.writeVarString(buf, item, 4096000);
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}
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} else {
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buf.setIntLE(removedRecipesOffsetSlot, -1);
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}
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}
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@Override
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public int computeSize() {
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int size = 10;
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if (this.recipes != null) {
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int recipesSize = 0;
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for (Entry<String, CraftingRecipe> kvp : this.recipes.entrySet()) {
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recipesSize += PacketIO.stringSize(kvp.getKey()) + kvp.getValue().computeSize();
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}
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size += VarInt.size(this.recipes.size()) + recipesSize;
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}
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if (this.removedRecipes != null) {
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int removedRecipesSize = 0;
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for (String elem : this.removedRecipes) {
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removedRecipesSize += PacketIO.stringSize(elem);
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}
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size += VarInt.size(this.removedRecipes.length) + removedRecipesSize;
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}
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return size;
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}
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public static ValidationResult validateStructure(@Nonnull ByteBuf buffer, int offset) {
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if (buffer.readableBytes() - offset < 10) {
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return ValidationResult.error("Buffer too small: expected at least 10 bytes");
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} else {
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byte nullBits = buffer.getByte(offset);
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if ((nullBits & 1) != 0) {
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int recipesOffset = buffer.getIntLE(offset + 2);
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if (recipesOffset < 0) {
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return ValidationResult.error("Invalid offset for Recipes");
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}
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int pos = offset + 10 + recipesOffset;
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if (pos >= buffer.writerIndex()) {
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return ValidationResult.error("Offset out of bounds for Recipes");
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}
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int recipesCount = VarInt.peek(buffer, pos);
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if (recipesCount < 0) {
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return ValidationResult.error("Invalid dictionary count for Recipes");
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}
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if (recipesCount > 4096000) {
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return ValidationResult.error("Recipes exceeds max length 4096000");
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}
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pos += VarInt.length(buffer, pos);
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for (int i = 0; i < recipesCount; i++) {
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int keyLen = VarInt.peek(buffer, pos);
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if (keyLen < 0) {
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return ValidationResult.error("Invalid string length for key");
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}
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if (keyLen > 4096000) {
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return ValidationResult.error("key exceeds max length 4096000");
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}
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pos += VarInt.length(buffer, pos);
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pos += keyLen;
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if (pos > buffer.writerIndex()) {
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return ValidationResult.error("Buffer overflow reading key");
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}
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pos += CraftingRecipe.computeBytesConsumed(buffer, pos);
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}
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}
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if ((nullBits & 2) != 0) {
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int removedRecipesOffset = buffer.getIntLE(offset + 6);
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if (removedRecipesOffset < 0) {
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return ValidationResult.error("Invalid offset for RemovedRecipes");
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}
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int posx = offset + 10 + removedRecipesOffset;
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if (posx >= buffer.writerIndex()) {
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return ValidationResult.error("Offset out of bounds for RemovedRecipes");
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}
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int removedRecipesCount = VarInt.peek(buffer, posx);
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if (removedRecipesCount < 0) {
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return ValidationResult.error("Invalid array count for RemovedRecipes");
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}
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if (removedRecipesCount > 4096000) {
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return ValidationResult.error("RemovedRecipes exceeds max length 4096000");
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}
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posx += VarInt.length(buffer, posx);
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for (int i = 0; i < removedRecipesCount; i++) {
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int strLen = VarInt.peek(buffer, posx);
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if (strLen < 0) {
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return ValidationResult.error("Invalid string length in RemovedRecipes");
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}
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posx += VarInt.length(buffer, posx);
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posx += strLen;
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if (posx > buffer.writerIndex()) {
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return ValidationResult.error("Buffer overflow reading string in RemovedRecipes");
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}
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}
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}
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return ValidationResult.OK;
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}
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}
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public UpdateRecipes clone() {
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UpdateRecipes copy = new UpdateRecipes();
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copy.type = this.type;
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if (this.recipes != null) {
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Map<String, CraftingRecipe> m = new HashMap<>();
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for (Entry<String, CraftingRecipe> e : this.recipes.entrySet()) {
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m.put(e.getKey(), e.getValue().clone());
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}
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copy.recipes = m;
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}
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copy.removedRecipes = this.removedRecipes != null ? Arrays.copyOf(this.removedRecipes, this.removedRecipes.length) : null;
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return copy;
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj) {
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return true;
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} else {
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return !(obj instanceof UpdateRecipes other)
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? false
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: Objects.equals(this.type, other.type)
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&& Objects.equals(this.recipes, other.recipes)
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&& Arrays.equals((Object[])this.removedRecipes, (Object[])other.removedRecipes);
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}
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}
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@Override
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public int hashCode() {
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int result = 1;
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result = 31 * result + Objects.hashCode(this.type);
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result = 31 * result + Objects.hashCode(this.recipes);
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return 31 * result + Arrays.hashCode((Object[])this.removedRecipes);
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}
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}
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