390 lines
13 KiB
Java
390 lines
13 KiB
Java
package com.hypixel.hytale.protocol.packets.world;
|
|
|
|
import com.hypixel.hytale.protocol.Packet;
|
|
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.Arrays;
|
|
import javax.annotation.Nonnull;
|
|
import javax.annotation.Nullable;
|
|
|
|
public class SetChunk implements Packet {
|
|
public static final int PACKET_ID = 131;
|
|
public static final boolean IS_COMPRESSED = true;
|
|
public static final int NULLABLE_BIT_FIELD_SIZE = 1;
|
|
public static final int FIXED_BLOCK_SIZE = 13;
|
|
public static final int VARIABLE_FIELD_COUNT = 3;
|
|
public static final int VARIABLE_BLOCK_START = 25;
|
|
public static final int MAX_SIZE = 12288040;
|
|
public int x;
|
|
public int y;
|
|
public int z;
|
|
@Nullable
|
|
public byte[] localLight;
|
|
@Nullable
|
|
public byte[] globalLight;
|
|
@Nullable
|
|
public byte[] data;
|
|
|
|
@Override
|
|
public int getId() {
|
|
return 131;
|
|
}
|
|
|
|
public SetChunk() {
|
|
}
|
|
|
|
public SetChunk(int x, int y, int z, @Nullable byte[] localLight, @Nullable byte[] globalLight, @Nullable byte[] data) {
|
|
this.x = x;
|
|
this.y = y;
|
|
this.z = z;
|
|
this.localLight = localLight;
|
|
this.globalLight = globalLight;
|
|
this.data = data;
|
|
}
|
|
|
|
public SetChunk(@Nonnull SetChunk other) {
|
|
this.x = other.x;
|
|
this.y = other.y;
|
|
this.z = other.z;
|
|
this.localLight = other.localLight;
|
|
this.globalLight = other.globalLight;
|
|
this.data = other.data;
|
|
}
|
|
|
|
@Nonnull
|
|
public static SetChunk deserialize(@Nonnull ByteBuf buf, int offset) {
|
|
SetChunk obj = new SetChunk();
|
|
byte nullBits = buf.getByte(offset);
|
|
obj.x = buf.getIntLE(offset + 1);
|
|
obj.y = buf.getIntLE(offset + 5);
|
|
obj.z = buf.getIntLE(offset + 9);
|
|
if ((nullBits & 1) != 0) {
|
|
int varPos0 = offset + 25 + buf.getIntLE(offset + 13);
|
|
int localLightCount = VarInt.peek(buf, varPos0);
|
|
if (localLightCount < 0) {
|
|
throw ProtocolException.negativeLength("LocalLight", localLightCount);
|
|
}
|
|
|
|
if (localLightCount > 4096000) {
|
|
throw ProtocolException.arrayTooLong("LocalLight", localLightCount, 4096000);
|
|
}
|
|
|
|
int varIntLen = VarInt.length(buf, varPos0);
|
|
if (varPos0 + varIntLen + localLightCount * 1L > buf.readableBytes()) {
|
|
throw ProtocolException.bufferTooSmall("LocalLight", varPos0 + varIntLen + localLightCount * 1, buf.readableBytes());
|
|
}
|
|
|
|
obj.localLight = new byte[localLightCount];
|
|
|
|
for (int i = 0; i < localLightCount; i++) {
|
|
obj.localLight[i] = buf.getByte(varPos0 + varIntLen + i * 1);
|
|
}
|
|
}
|
|
|
|
if ((nullBits & 2) != 0) {
|
|
int varPos1 = offset + 25 + buf.getIntLE(offset + 17);
|
|
int globalLightCount = VarInt.peek(buf, varPos1);
|
|
if (globalLightCount < 0) {
|
|
throw ProtocolException.negativeLength("GlobalLight", globalLightCount);
|
|
}
|
|
|
|
if (globalLightCount > 4096000) {
|
|
throw ProtocolException.arrayTooLong("GlobalLight", globalLightCount, 4096000);
|
|
}
|
|
|
|
int varIntLen = VarInt.length(buf, varPos1);
|
|
if (varPos1 + varIntLen + globalLightCount * 1L > buf.readableBytes()) {
|
|
throw ProtocolException.bufferTooSmall("GlobalLight", varPos1 + varIntLen + globalLightCount * 1, buf.readableBytes());
|
|
}
|
|
|
|
obj.globalLight = new byte[globalLightCount];
|
|
|
|
for (int i = 0; i < globalLightCount; i++) {
|
|
obj.globalLight[i] = buf.getByte(varPos1 + varIntLen + i * 1);
|
|
}
|
|
}
|
|
|
|
if ((nullBits & 4) != 0) {
|
|
int varPos2 = offset + 25 + buf.getIntLE(offset + 21);
|
|
int dataCount = VarInt.peek(buf, varPos2);
|
|
if (dataCount < 0) {
|
|
throw ProtocolException.negativeLength("Data", dataCount);
|
|
}
|
|
|
|
if (dataCount > 4096000) {
|
|
throw ProtocolException.arrayTooLong("Data", dataCount, 4096000);
|
|
}
|
|
|
|
int varIntLen = VarInt.length(buf, varPos2);
|
|
if (varPos2 + varIntLen + dataCount * 1L > buf.readableBytes()) {
|
|
throw ProtocolException.bufferTooSmall("Data", varPos2 + varIntLen + dataCount * 1, buf.readableBytes());
|
|
}
|
|
|
|
obj.data = new byte[dataCount];
|
|
|
|
for (int i = 0; i < dataCount; i++) {
|
|
obj.data[i] = buf.getByte(varPos2 + varIntLen + i * 1);
|
|
}
|
|
}
|
|
|
|
return obj;
|
|
}
|
|
|
|
public static int computeBytesConsumed(@Nonnull ByteBuf buf, int offset) {
|
|
byte nullBits = buf.getByte(offset);
|
|
int maxEnd = 25;
|
|
if ((nullBits & 1) != 0) {
|
|
int fieldOffset0 = buf.getIntLE(offset + 13);
|
|
int pos0 = offset + 25 + fieldOffset0;
|
|
int arrLen = VarInt.peek(buf, pos0);
|
|
pos0 += VarInt.length(buf, pos0) + arrLen * 1;
|
|
if (pos0 - offset > maxEnd) {
|
|
maxEnd = pos0 - offset;
|
|
}
|
|
}
|
|
|
|
if ((nullBits & 2) != 0) {
|
|
int fieldOffset1 = buf.getIntLE(offset + 17);
|
|
int pos1 = offset + 25 + fieldOffset1;
|
|
int arrLen = VarInt.peek(buf, pos1);
|
|
pos1 += VarInt.length(buf, pos1) + arrLen * 1;
|
|
if (pos1 - offset > maxEnd) {
|
|
maxEnd = pos1 - offset;
|
|
}
|
|
}
|
|
|
|
if ((nullBits & 4) != 0) {
|
|
int fieldOffset2 = buf.getIntLE(offset + 21);
|
|
int pos2 = offset + 25 + fieldOffset2;
|
|
int arrLen = VarInt.peek(buf, pos2);
|
|
pos2 += VarInt.length(buf, pos2) + arrLen * 1;
|
|
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.localLight != null) {
|
|
nullBits = (byte)(nullBits | 1);
|
|
}
|
|
|
|
if (this.globalLight != null) {
|
|
nullBits = (byte)(nullBits | 2);
|
|
}
|
|
|
|
if (this.data != null) {
|
|
nullBits = (byte)(nullBits | 4);
|
|
}
|
|
|
|
buf.writeByte(nullBits);
|
|
buf.writeIntLE(this.x);
|
|
buf.writeIntLE(this.y);
|
|
buf.writeIntLE(this.z);
|
|
int localLightOffsetSlot = buf.writerIndex();
|
|
buf.writeIntLE(0);
|
|
int globalLightOffsetSlot = buf.writerIndex();
|
|
buf.writeIntLE(0);
|
|
int dataOffsetSlot = buf.writerIndex();
|
|
buf.writeIntLE(0);
|
|
int varBlockStart = buf.writerIndex();
|
|
if (this.localLight != null) {
|
|
buf.setIntLE(localLightOffsetSlot, buf.writerIndex() - varBlockStart);
|
|
if (this.localLight.length > 4096000) {
|
|
throw ProtocolException.arrayTooLong("LocalLight", this.localLight.length, 4096000);
|
|
}
|
|
|
|
VarInt.write(buf, this.localLight.length);
|
|
|
|
for (byte item : this.localLight) {
|
|
buf.writeByte(item);
|
|
}
|
|
} else {
|
|
buf.setIntLE(localLightOffsetSlot, -1);
|
|
}
|
|
|
|
if (this.globalLight != null) {
|
|
buf.setIntLE(globalLightOffsetSlot, buf.writerIndex() - varBlockStart);
|
|
if (this.globalLight.length > 4096000) {
|
|
throw ProtocolException.arrayTooLong("GlobalLight", this.globalLight.length, 4096000);
|
|
}
|
|
|
|
VarInt.write(buf, this.globalLight.length);
|
|
|
|
for (byte item : this.globalLight) {
|
|
buf.writeByte(item);
|
|
}
|
|
} else {
|
|
buf.setIntLE(globalLightOffsetSlot, -1);
|
|
}
|
|
|
|
if (this.data != null) {
|
|
buf.setIntLE(dataOffsetSlot, buf.writerIndex() - varBlockStart);
|
|
if (this.data.length > 4096000) {
|
|
throw ProtocolException.arrayTooLong("Data", this.data.length, 4096000);
|
|
}
|
|
|
|
VarInt.write(buf, this.data.length);
|
|
|
|
for (byte item : this.data) {
|
|
buf.writeByte(item);
|
|
}
|
|
} else {
|
|
buf.setIntLE(dataOffsetSlot, -1);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public int computeSize() {
|
|
int size = 25;
|
|
if (this.localLight != null) {
|
|
size += VarInt.size(this.localLight.length) + this.localLight.length * 1;
|
|
}
|
|
|
|
if (this.globalLight != null) {
|
|
size += VarInt.size(this.globalLight.length) + this.globalLight.length * 1;
|
|
}
|
|
|
|
if (this.data != null) {
|
|
size += VarInt.size(this.data.length) + this.data.length * 1;
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
public static ValidationResult validateStructure(@Nonnull ByteBuf buffer, int offset) {
|
|
if (buffer.readableBytes() - offset < 25) {
|
|
return ValidationResult.error("Buffer too small: expected at least 25 bytes");
|
|
} else {
|
|
byte nullBits = buffer.getByte(offset);
|
|
if ((nullBits & 1) != 0) {
|
|
int localLightOffset = buffer.getIntLE(offset + 13);
|
|
if (localLightOffset < 0) {
|
|
return ValidationResult.error("Invalid offset for LocalLight");
|
|
}
|
|
|
|
int pos = offset + 25 + localLightOffset;
|
|
if (pos >= buffer.writerIndex()) {
|
|
return ValidationResult.error("Offset out of bounds for LocalLight");
|
|
}
|
|
|
|
int localLightCount = VarInt.peek(buffer, pos);
|
|
if (localLightCount < 0) {
|
|
return ValidationResult.error("Invalid array count for LocalLight");
|
|
}
|
|
|
|
if (localLightCount > 4096000) {
|
|
return ValidationResult.error("LocalLight exceeds max length 4096000");
|
|
}
|
|
|
|
pos += VarInt.length(buffer, pos);
|
|
pos += localLightCount * 1;
|
|
if (pos > buffer.writerIndex()) {
|
|
return ValidationResult.error("Buffer overflow reading LocalLight");
|
|
}
|
|
}
|
|
|
|
if ((nullBits & 2) != 0) {
|
|
int globalLightOffset = buffer.getIntLE(offset + 17);
|
|
if (globalLightOffset < 0) {
|
|
return ValidationResult.error("Invalid offset for GlobalLight");
|
|
}
|
|
|
|
int posx = offset + 25 + globalLightOffset;
|
|
if (posx >= buffer.writerIndex()) {
|
|
return ValidationResult.error("Offset out of bounds for GlobalLight");
|
|
}
|
|
|
|
int globalLightCount = VarInt.peek(buffer, posx);
|
|
if (globalLightCount < 0) {
|
|
return ValidationResult.error("Invalid array count for GlobalLight");
|
|
}
|
|
|
|
if (globalLightCount > 4096000) {
|
|
return ValidationResult.error("GlobalLight exceeds max length 4096000");
|
|
}
|
|
|
|
posx += VarInt.length(buffer, posx);
|
|
posx += globalLightCount * 1;
|
|
if (posx > buffer.writerIndex()) {
|
|
return ValidationResult.error("Buffer overflow reading GlobalLight");
|
|
}
|
|
}
|
|
|
|
if ((nullBits & 4) != 0) {
|
|
int dataOffset = buffer.getIntLE(offset + 21);
|
|
if (dataOffset < 0) {
|
|
return ValidationResult.error("Invalid offset for Data");
|
|
}
|
|
|
|
int posxx = offset + 25 + dataOffset;
|
|
if (posxx >= buffer.writerIndex()) {
|
|
return ValidationResult.error("Offset out of bounds for Data");
|
|
}
|
|
|
|
int dataCount = VarInt.peek(buffer, posxx);
|
|
if (dataCount < 0) {
|
|
return ValidationResult.error("Invalid array count for Data");
|
|
}
|
|
|
|
if (dataCount > 4096000) {
|
|
return ValidationResult.error("Data exceeds max length 4096000");
|
|
}
|
|
|
|
posxx += VarInt.length(buffer, posxx);
|
|
posxx += dataCount * 1;
|
|
if (posxx > buffer.writerIndex()) {
|
|
return ValidationResult.error("Buffer overflow reading Data");
|
|
}
|
|
}
|
|
|
|
return ValidationResult.OK;
|
|
}
|
|
}
|
|
|
|
public SetChunk clone() {
|
|
SetChunk copy = new SetChunk();
|
|
copy.x = this.x;
|
|
copy.y = this.y;
|
|
copy.z = this.z;
|
|
copy.localLight = this.localLight != null ? Arrays.copyOf(this.localLight, this.localLight.length) : null;
|
|
copy.globalLight = this.globalLight != null ? Arrays.copyOf(this.globalLight, this.globalLight.length) : null;
|
|
copy.data = this.data != null ? Arrays.copyOf(this.data, this.data.length) : null;
|
|
return copy;
|
|
}
|
|
|
|
@Override
|
|
public boolean equals(Object obj) {
|
|
if (this == obj) {
|
|
return true;
|
|
} else {
|
|
return !(obj instanceof SetChunk other)
|
|
? false
|
|
: this.x == other.x
|
|
&& this.y == other.y
|
|
&& this.z == other.z
|
|
&& Arrays.equals(this.localLight, other.localLight)
|
|
&& Arrays.equals(this.globalLight, other.globalLight)
|
|
&& Arrays.equals(this.data, other.data);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public int hashCode() {
|
|
int result = 1;
|
|
result = 31 * result + Integer.hashCode(this.x);
|
|
result = 31 * result + Integer.hashCode(this.y);
|
|
result = 31 * result + Integer.hashCode(this.z);
|
|
result = 31 * result + Arrays.hashCode(this.localLight);
|
|
result = 31 * result + Arrays.hashCode(this.globalLight);
|
|
return 31 * result + Arrays.hashCode(this.data);
|
|
}
|
|
}
|