392 lines
13 KiB
Java
392 lines
13 KiB
Java
package com.hypixel.hytale.protocol.packets.assets;
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import com.hypixel.hytale.protocol.ItemBase;
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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 UpdateItems implements Packet {
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public static final int PACKET_ID = 54;
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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 = 4;
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public static final int VARIABLE_FIELD_COUNT = 2;
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public static final int VARIABLE_BLOCK_START = 12;
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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, ItemBase> items;
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@Nullable
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public String[] removedItems;
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public boolean updateModels;
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public boolean updateIcons;
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@Override
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public int getId() {
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return 54;
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}
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public UpdateItems() {
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}
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public UpdateItems(
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@Nonnull UpdateType type, @Nullable Map<String, ItemBase> items, @Nullable String[] removedItems, boolean updateModels, boolean updateIcons
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) {
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this.type = type;
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this.items = items;
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this.removedItems = removedItems;
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this.updateModels = updateModels;
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this.updateIcons = updateIcons;
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}
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public UpdateItems(@Nonnull UpdateItems other) {
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this.type = other.type;
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this.items = other.items;
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this.removedItems = other.removedItems;
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this.updateModels = other.updateModels;
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this.updateIcons = other.updateIcons;
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}
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@Nonnull
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public static UpdateItems deserialize(@Nonnull ByteBuf buf, int offset) {
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UpdateItems obj = new UpdateItems();
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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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obj.updateModels = buf.getByte(offset + 2) != 0;
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obj.updateIcons = buf.getByte(offset + 3) != 0;
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if ((nullBits & 1) != 0) {
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int varPos0 = offset + 12 + buf.getIntLE(offset + 4);
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int itemsCount = VarInt.peek(buf, varPos0);
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if (itemsCount < 0) {
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throw ProtocolException.negativeLength("Items", itemsCount);
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}
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if (itemsCount > 4096000) {
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throw ProtocolException.dictionaryTooLarge("Items", itemsCount, 4096000);
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}
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int varIntLen = VarInt.length(buf, varPos0);
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obj.items = new HashMap<>(itemsCount);
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int dictPos = varPos0 + varIntLen;
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for (int i = 0; i < itemsCount; 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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ItemBase val = ItemBase.deserialize(buf, dictPos);
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dictPos += ItemBase.computeBytesConsumed(buf, dictPos);
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if (obj.items.put(key, val) != null) {
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throw ProtocolException.duplicateKey("items", 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 + 12 + buf.getIntLE(offset + 8);
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int removedItemsCount = VarInt.peek(buf, varPos1);
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if (removedItemsCount < 0) {
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throw ProtocolException.negativeLength("RemovedItems", removedItemsCount);
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}
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if (removedItemsCount > 4096000) {
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throw ProtocolException.arrayTooLong("RemovedItems", removedItemsCount, 4096000);
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}
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int varIntLen = VarInt.length(buf, varPos1);
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if (varPos1 + varIntLen + removedItemsCount * 1L > buf.readableBytes()) {
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throw ProtocolException.bufferTooSmall("RemovedItems", varPos1 + varIntLen + removedItemsCount * 1, buf.readableBytes());
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}
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obj.removedItems = new String[removedItemsCount];
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int elemPos = varPos1 + varIntLen;
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for (int i = 0; i < removedItemsCount; 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("removedItems[" + i + "]", strLen);
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}
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if (strLen > 4096000) {
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throw ProtocolException.stringTooLong("removedItems[" + i + "]", strLen, 4096000);
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}
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int strVarLen = VarInt.length(buf, elemPos);
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obj.removedItems[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 = 12;
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if ((nullBits & 1) != 0) {
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int fieldOffset0 = buf.getIntLE(offset + 4);
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int pos0 = offset + 12 + 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 += ItemBase.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 + 8);
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int pos1 = offset + 12 + 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.items != null) {
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nullBits = (byte)(nullBits | 1);
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}
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if (this.removedItems != 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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buf.writeByte(this.updateModels ? 1 : 0);
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buf.writeByte(this.updateIcons ? 1 : 0);
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int itemsOffsetSlot = buf.writerIndex();
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buf.writeIntLE(0);
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int removedItemsOffsetSlot = buf.writerIndex();
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buf.writeIntLE(0);
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int varBlockStart = buf.writerIndex();
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if (this.items != null) {
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buf.setIntLE(itemsOffsetSlot, buf.writerIndex() - varBlockStart);
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if (this.items.size() > 4096000) {
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throw ProtocolException.dictionaryTooLarge("Items", this.items.size(), 4096000);
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}
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VarInt.write(buf, this.items.size());
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for (Entry<String, ItemBase> e : this.items.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(itemsOffsetSlot, -1);
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}
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if (this.removedItems != null) {
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buf.setIntLE(removedItemsOffsetSlot, buf.writerIndex() - varBlockStart);
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if (this.removedItems.length > 4096000) {
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throw ProtocolException.arrayTooLong("RemovedItems", this.removedItems.length, 4096000);
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}
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VarInt.write(buf, this.removedItems.length);
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for (String item : this.removedItems) {
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PacketIO.writeVarString(buf, item, 4096000);
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}
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} else {
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buf.setIntLE(removedItemsOffsetSlot, -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 = 12;
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if (this.items != null) {
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int itemsSize = 0;
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for (Entry<String, ItemBase> kvp : this.items.entrySet()) {
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itemsSize += PacketIO.stringSize(kvp.getKey()) + kvp.getValue().computeSize();
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}
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size += VarInt.size(this.items.size()) + itemsSize;
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}
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if (this.removedItems != null) {
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int removedItemsSize = 0;
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for (String elem : this.removedItems) {
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removedItemsSize += PacketIO.stringSize(elem);
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}
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size += VarInt.size(this.removedItems.length) + removedItemsSize;
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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 < 12) {
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return ValidationResult.error("Buffer too small: expected at least 12 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 itemsOffset = buffer.getIntLE(offset + 4);
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if (itemsOffset < 0) {
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return ValidationResult.error("Invalid offset for Items");
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}
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int pos = offset + 12 + itemsOffset;
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if (pos >= buffer.writerIndex()) {
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return ValidationResult.error("Offset out of bounds for Items");
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}
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int itemsCount = VarInt.peek(buffer, pos);
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if (itemsCount < 0) {
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return ValidationResult.error("Invalid dictionary count for Items");
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}
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if (itemsCount > 4096000) {
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return ValidationResult.error("Items 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 < itemsCount; 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 += ItemBase.computeBytesConsumed(buffer, pos);
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}
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}
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if ((nullBits & 2) != 0) {
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int removedItemsOffset = buffer.getIntLE(offset + 8);
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if (removedItemsOffset < 0) {
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return ValidationResult.error("Invalid offset for RemovedItems");
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}
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int posx = offset + 12 + removedItemsOffset;
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if (posx >= buffer.writerIndex()) {
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return ValidationResult.error("Offset out of bounds for RemovedItems");
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}
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int removedItemsCount = VarInt.peek(buffer, posx);
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if (removedItemsCount < 0) {
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return ValidationResult.error("Invalid array count for RemovedItems");
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}
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if (removedItemsCount > 4096000) {
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return ValidationResult.error("RemovedItems 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 < removedItemsCount; 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 RemovedItems");
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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 RemovedItems");
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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 UpdateItems clone() {
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UpdateItems copy = new UpdateItems();
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copy.type = this.type;
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if (this.items != null) {
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Map<String, ItemBase> m = new HashMap<>();
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for (Entry<String, ItemBase> e : this.items.entrySet()) {
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m.put(e.getKey(), e.getValue().clone());
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}
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copy.items = m;
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}
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copy.removedItems = this.removedItems != null ? Arrays.copyOf(this.removedItems, this.removedItems.length) : null;
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copy.updateModels = this.updateModels;
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copy.updateIcons = this.updateIcons;
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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 UpdateItems other)
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? false
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: Objects.equals(this.type, other.type)
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&& Objects.equals(this.items, other.items)
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&& Arrays.equals((Object[])this.removedItems, (Object[])other.removedItems)
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&& this.updateModels == other.updateModels
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&& this.updateIcons == other.updateIcons;
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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.items);
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result = 31 * result + Arrays.hashCode((Object[])this.removedItems);
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result = 31 * result + Boolean.hashCode(this.updateModels);
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return 31 * result + Boolean.hashCode(this.updateIcons);
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}
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}
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