286 lines
9.4 KiB
Java
286 lines
9.4 KiB
Java
package com.hypixel.hytale.protocol.packets.window;
|
|
|
|
import com.hypixel.hytale.protocol.ExtraResources;
|
|
import com.hypixel.hytale.protocol.InventorySection;
|
|
import com.hypixel.hytale.protocol.Packet;
|
|
import com.hypixel.hytale.protocol.io.PacketIO;
|
|
import com.hypixel.hytale.protocol.io.ProtocolException;
|
|
import com.hypixel.hytale.protocol.io.ValidationResult;
|
|
import com.hypixel.hytale.protocol.io.VarInt;
|
|
import io.netty.buffer.ByteBuf;
|
|
import java.util.Objects;
|
|
import javax.annotation.Nonnull;
|
|
import javax.annotation.Nullable;
|
|
|
|
public class UpdateWindow implements Packet {
|
|
public static final int PACKET_ID = 201;
|
|
public static final boolean IS_COMPRESSED = true;
|
|
public static final int NULLABLE_BIT_FIELD_SIZE = 1;
|
|
public static final int FIXED_BLOCK_SIZE = 5;
|
|
public static final int VARIABLE_FIELD_COUNT = 3;
|
|
public static final int VARIABLE_BLOCK_START = 17;
|
|
public static final int MAX_SIZE = 1677721600;
|
|
public int id;
|
|
@Nullable
|
|
public String windowData;
|
|
@Nullable
|
|
public InventorySection inventory;
|
|
@Nullable
|
|
public ExtraResources extraResources;
|
|
|
|
@Override
|
|
public int getId() {
|
|
return 201;
|
|
}
|
|
|
|
public UpdateWindow() {
|
|
}
|
|
|
|
public UpdateWindow(int id, @Nullable String windowData, @Nullable InventorySection inventory, @Nullable ExtraResources extraResources) {
|
|
this.id = id;
|
|
this.windowData = windowData;
|
|
this.inventory = inventory;
|
|
this.extraResources = extraResources;
|
|
}
|
|
|
|
public UpdateWindow(@Nonnull UpdateWindow other) {
|
|
this.id = other.id;
|
|
this.windowData = other.windowData;
|
|
this.inventory = other.inventory;
|
|
this.extraResources = other.extraResources;
|
|
}
|
|
|
|
@Nonnull
|
|
public static UpdateWindow deserialize(@Nonnull ByteBuf buf, int offset) {
|
|
UpdateWindow obj = new UpdateWindow();
|
|
byte nullBits = buf.getByte(offset);
|
|
obj.id = buf.getIntLE(offset + 1);
|
|
if ((nullBits & 1) != 0) {
|
|
int varPos0 = offset + 17 + buf.getIntLE(offset + 5);
|
|
int windowDataLen = VarInt.peek(buf, varPos0);
|
|
if (windowDataLen < 0) {
|
|
throw ProtocolException.negativeLength("WindowData", windowDataLen);
|
|
}
|
|
|
|
if (windowDataLen > 4096000) {
|
|
throw ProtocolException.stringTooLong("WindowData", windowDataLen, 4096000);
|
|
}
|
|
|
|
obj.windowData = PacketIO.readVarString(buf, varPos0, PacketIO.UTF8);
|
|
}
|
|
|
|
if ((nullBits & 2) != 0) {
|
|
int varPos1 = offset + 17 + buf.getIntLE(offset + 9);
|
|
obj.inventory = InventorySection.deserialize(buf, varPos1);
|
|
}
|
|
|
|
if ((nullBits & 4) != 0) {
|
|
int varPos2 = offset + 17 + buf.getIntLE(offset + 13);
|
|
obj.extraResources = ExtraResources.deserialize(buf, varPos2);
|
|
}
|
|
|
|
return obj;
|
|
}
|
|
|
|
public static int computeBytesConsumed(@Nonnull ByteBuf buf, int offset) {
|
|
byte nullBits = buf.getByte(offset);
|
|
int maxEnd = 17;
|
|
if ((nullBits & 1) != 0) {
|
|
int fieldOffset0 = buf.getIntLE(offset + 5);
|
|
int pos0 = offset + 17 + fieldOffset0;
|
|
int sl = VarInt.peek(buf, pos0);
|
|
pos0 += VarInt.length(buf, pos0) + sl;
|
|
if (pos0 - offset > maxEnd) {
|
|
maxEnd = pos0 - offset;
|
|
}
|
|
}
|
|
|
|
if ((nullBits & 2) != 0) {
|
|
int fieldOffset1 = buf.getIntLE(offset + 9);
|
|
int pos1 = offset + 17 + fieldOffset1;
|
|
pos1 += InventorySection.computeBytesConsumed(buf, pos1);
|
|
if (pos1 - offset > maxEnd) {
|
|
maxEnd = pos1 - offset;
|
|
}
|
|
}
|
|
|
|
if ((nullBits & 4) != 0) {
|
|
int fieldOffset2 = buf.getIntLE(offset + 13);
|
|
int pos2 = offset + 17 + fieldOffset2;
|
|
pos2 += ExtraResources.computeBytesConsumed(buf, pos2);
|
|
if (pos2 - offset > maxEnd) {
|
|
maxEnd = pos2 - offset;
|
|
}
|
|
}
|
|
|
|
return maxEnd;
|
|
}
|
|
|
|
@Override
|
|
public void serialize(@Nonnull ByteBuf buf) {
|
|
int startPos = buf.writerIndex();
|
|
byte nullBits = 0;
|
|
if (this.windowData != null) {
|
|
nullBits = (byte)(nullBits | 1);
|
|
}
|
|
|
|
if (this.inventory != null) {
|
|
nullBits = (byte)(nullBits | 2);
|
|
}
|
|
|
|
if (this.extraResources != null) {
|
|
nullBits = (byte)(nullBits | 4);
|
|
}
|
|
|
|
buf.writeByte(nullBits);
|
|
buf.writeIntLE(this.id);
|
|
int windowDataOffsetSlot = buf.writerIndex();
|
|
buf.writeIntLE(0);
|
|
int inventoryOffsetSlot = buf.writerIndex();
|
|
buf.writeIntLE(0);
|
|
int extraResourcesOffsetSlot = buf.writerIndex();
|
|
buf.writeIntLE(0);
|
|
int varBlockStart = buf.writerIndex();
|
|
if (this.windowData != null) {
|
|
buf.setIntLE(windowDataOffsetSlot, buf.writerIndex() - varBlockStart);
|
|
PacketIO.writeVarString(buf, this.windowData, 4096000);
|
|
} else {
|
|
buf.setIntLE(windowDataOffsetSlot, -1);
|
|
}
|
|
|
|
if (this.inventory != null) {
|
|
buf.setIntLE(inventoryOffsetSlot, buf.writerIndex() - varBlockStart);
|
|
this.inventory.serialize(buf);
|
|
} else {
|
|
buf.setIntLE(inventoryOffsetSlot, -1);
|
|
}
|
|
|
|
if (this.extraResources != null) {
|
|
buf.setIntLE(extraResourcesOffsetSlot, buf.writerIndex() - varBlockStart);
|
|
this.extraResources.serialize(buf);
|
|
} else {
|
|
buf.setIntLE(extraResourcesOffsetSlot, -1);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public int computeSize() {
|
|
int size = 17;
|
|
if (this.windowData != null) {
|
|
size += PacketIO.stringSize(this.windowData);
|
|
}
|
|
|
|
if (this.inventory != null) {
|
|
size += this.inventory.computeSize();
|
|
}
|
|
|
|
if (this.extraResources != null) {
|
|
size += this.extraResources.computeSize();
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
public static ValidationResult validateStructure(@Nonnull ByteBuf buffer, int offset) {
|
|
if (buffer.readableBytes() - offset < 17) {
|
|
return ValidationResult.error("Buffer too small: expected at least 17 bytes");
|
|
} else {
|
|
byte nullBits = buffer.getByte(offset);
|
|
if ((nullBits & 1) != 0) {
|
|
int windowDataOffset = buffer.getIntLE(offset + 5);
|
|
if (windowDataOffset < 0) {
|
|
return ValidationResult.error("Invalid offset for WindowData");
|
|
}
|
|
|
|
int pos = offset + 17 + windowDataOffset;
|
|
if (pos >= buffer.writerIndex()) {
|
|
return ValidationResult.error("Offset out of bounds for WindowData");
|
|
}
|
|
|
|
int windowDataLen = VarInt.peek(buffer, pos);
|
|
if (windowDataLen < 0) {
|
|
return ValidationResult.error("Invalid string length for WindowData");
|
|
}
|
|
|
|
if (windowDataLen > 4096000) {
|
|
return ValidationResult.error("WindowData exceeds max length 4096000");
|
|
}
|
|
|
|
pos += VarInt.length(buffer, pos);
|
|
pos += windowDataLen;
|
|
if (pos > buffer.writerIndex()) {
|
|
return ValidationResult.error("Buffer overflow reading WindowData");
|
|
}
|
|
}
|
|
|
|
if ((nullBits & 2) != 0) {
|
|
int inventoryOffset = buffer.getIntLE(offset + 9);
|
|
if (inventoryOffset < 0) {
|
|
return ValidationResult.error("Invalid offset for Inventory");
|
|
}
|
|
|
|
int posx = offset + 17 + inventoryOffset;
|
|
if (posx >= buffer.writerIndex()) {
|
|
return ValidationResult.error("Offset out of bounds for Inventory");
|
|
}
|
|
|
|
ValidationResult inventoryResult = InventorySection.validateStructure(buffer, posx);
|
|
if (!inventoryResult.isValid()) {
|
|
return ValidationResult.error("Invalid Inventory: " + inventoryResult.error());
|
|
}
|
|
|
|
posx += InventorySection.computeBytesConsumed(buffer, posx);
|
|
}
|
|
|
|
if ((nullBits & 4) != 0) {
|
|
int extraResourcesOffset = buffer.getIntLE(offset + 13);
|
|
if (extraResourcesOffset < 0) {
|
|
return ValidationResult.error("Invalid offset for ExtraResources");
|
|
}
|
|
|
|
int posxx = offset + 17 + extraResourcesOffset;
|
|
if (posxx >= buffer.writerIndex()) {
|
|
return ValidationResult.error("Offset out of bounds for ExtraResources");
|
|
}
|
|
|
|
ValidationResult extraResourcesResult = ExtraResources.validateStructure(buffer, posxx);
|
|
if (!extraResourcesResult.isValid()) {
|
|
return ValidationResult.error("Invalid ExtraResources: " + extraResourcesResult.error());
|
|
}
|
|
|
|
posxx += ExtraResources.computeBytesConsumed(buffer, posxx);
|
|
}
|
|
|
|
return ValidationResult.OK;
|
|
}
|
|
}
|
|
|
|
public UpdateWindow clone() {
|
|
UpdateWindow copy = new UpdateWindow();
|
|
copy.id = this.id;
|
|
copy.windowData = this.windowData;
|
|
copy.inventory = this.inventory != null ? this.inventory.clone() : null;
|
|
copy.extraResources = this.extraResources != null ? this.extraResources.clone() : null;
|
|
return copy;
|
|
}
|
|
|
|
@Override
|
|
public boolean equals(Object obj) {
|
|
if (this == obj) {
|
|
return true;
|
|
} else {
|
|
return !(obj instanceof UpdateWindow other)
|
|
? false
|
|
: this.id == other.id
|
|
&& Objects.equals(this.windowData, other.windowData)
|
|
&& Objects.equals(this.inventory, other.inventory)
|
|
&& Objects.equals(this.extraResources, other.extraResources);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public int hashCode() {
|
|
return Objects.hash(this.id, this.windowData, this.inventory, this.extraResources);
|
|
}
|
|
}
|