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improve support for custom payloads in 1.20.2 (#2553)

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Pasqual Koschmieder 2023-10-25 03:01:35 +02:00 committed by GitHub
parent af33a2ab41
commit a7aa31adc0
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2 changed files with 104 additions and 25 deletions
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72
src/main/java/com/comphenix/protocol/wrappers/CustomPacketPayloadWrapper.java
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@ -12,10 +12,13 @@ import com.comphenix.protocol.utility.ByteBuddyGenerated;
import com.comphenix.protocol.utility.MinecraftReflection;
import com.comphenix.protocol.utility.StreamSerializer;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Objects;
import net.bytebuddy.ByteBuddy;
import net.bytebuddy.dynamic.loading.ClassLoadingStrategy;
import net.bytebuddy.implementation.FieldAccessor;
@ -40,27 +43,33 @@ public final class CustomPacketPayloadWrapper {
private static final Class<?> MINECRAFT_KEY_CLASS;
private static final Class<?> CUSTOM_PACKET_PAYLOAD_CLASS;
private static final MethodAccessor WRITE_BYTES_METHOD;
private static final ConstructorAccessor PAYLOAD_WRAPPER_CONSTRUCTOR;
private static final MethodAccessor GET_ID_PAYLOAD_METHOD;
private static final MethodAccessor SERIALIZE_PAYLOAD_METHOD;
private static final EquivalentConverter<CustomPacketPayloadWrapper> CONVERTER;
static {
try {
// using this method is a small hack to prevent fuzzy from finding the renamed "getBytes(byte[])" method
// the method we're extracting here is: writeBytes(byte[] data, int arrayStartInclusive, int arrayEndExclusive)
Class<?> packetDataSerializer = MinecraftReflection.getPacketDataSerializerClass();
Method writeBytes = FuzzyReflection.fromClass(packetDataSerializer, false).getMethod(FuzzyMethodContract.newBuilder()
.banModifier(Modifier.STATIC)
.requireModifier(Modifier.PUBLIC)
.parameterExactArray(byte[].class, int.class, int.class)
.returnTypeExact(packetDataSerializer)
.build());
WRITE_BYTES_METHOD = Accessors.getMethodAccessor(writeBytes);
MINECRAFT_KEY_CLASS = MinecraftReflection.getMinecraftKeyClass();
CUSTOM_PACKET_PAYLOAD_CLASS = MinecraftReflection.getMinecraftClass("network.protocol.common.custom.CustomPacketPayload");
Method getPayloadId = FuzzyReflection.fromClass(CUSTOM_PACKET_PAYLOAD_CLASS).getMethod(FuzzyMethodContract.newBuilder()
.banModifier(Modifier.STATIC)
.returnTypeExact(MINECRAFT_KEY_CLASS)
.parameterCount(0)
.build());
GET_ID_PAYLOAD_METHOD = Accessors.getMethodAccessor(getPayloadId);
Method serializePayloadData = FuzzyReflection.fromClass(CUSTOM_PACKET_PAYLOAD_CLASS).getMethod(FuzzyMethodContract.newBuilder()
.banModifier(Modifier.STATIC)
.returnTypeVoid()
.parameterCount(1)
.parameterDerivedOf(ByteBuf.class, 0)
.build());
SERIALIZE_PAYLOAD_METHOD = Accessors.getMethodAccessor(serializePayloadData);
Constructor<?> payloadWrapperConstructor = makePayloadWrapper();
PAYLOAD_WRAPPER_CONSTRUCTOR = Accessors.getConstructorAccessor(payloadWrapperConstructor);
@ -153,23 +162,36 @@ public final class CustomPacketPayloadWrapper {
}
/**
* Constructs this wrapper from an incoming ServerboundCustomPayloadPacket.UnknownPayload. All other types of
* payloads are not supported and will result in an exception.
* Constructs this wrapper from any CustomPayload type.
* <p>
* Note: the buffer of the given UnknownPayload will <strong>NOT</strong> be released by this operation. Make sure
* Note: the buffer of the given payload (if any) will <strong>NOT</strong> be released by this operation. Make sure
* to release the buffer manually if you discard the packet to prevent memory leaks.
*
* @param unknownPayload the instance of the unknown payload to convert to this wrapper.
* @return a wrapper holding the minecraft key and payload of the given UnknownPayload instance.
* @param payload the instance of the custom payload to convert to this wrapper.
* @return a wrapper holding the minecraft key and payload of the given custom payload instance.
*/
public static CustomPacketPayloadWrapper fromUnknownPayload(Object unknownPayload) {
StructureModifier<Object> modifier = new StructureModifier<>(unknownPayload.getClass()).withTarget(unknownPayload);
Object messageId = modifier.withType(MINECRAFT_KEY_CLASS).read(0);
ByteBuf messagePayload = (ByteBuf) modifier.withType(ByteBuf.class).read(0);
public static CustomPacketPayloadWrapper fromUnknownPayload(Object payload) {
Object messageId = GET_ID_PAYLOAD_METHOD.invoke(payload);
MinecraftKey id = MinecraftKey.getConverter().getSpecific(messageId);
byte[] payload = StreamSerializer.getDefault().getBytesAndRelease(messagePayload.retain());
return new CustomPacketPayloadWrapper(payload, id);
// we read and retain the underlying buffer in case the class uses a buffer to store the data
// this way, when passing the packet to further handling, the buffer is not released and can be re-used
StructureModifier<Object> modifier = new StructureModifier<>(payload.getClass()).withTarget(payload);
byte[] messagePayload = modifier.withType(ByteBuf.class).optionRead(0)
.map(buffer -> {
ByteBuf buf = (ByteBuf) buffer;
byte[] data = StreamSerializer.getDefault().getBytesAndRelease(buf.markReaderIndex().retain());
buf.resetReaderIndex();
return data;
})
.orElseGet(() -> {
ByteBuf buffer = Unpooled.buffer();
Object serializer = MinecraftReflection.getPacketDataSerializer(buffer);
SERIALIZE_PAYLOAD_METHOD.invoke(payload, serializer);
return StreamSerializer.getDefault().getBytesAndRelease(buffer);
});
return new CustomPacketPayloadWrapper(messagePayload, id);
}
/**
@ -217,7 +239,7 @@ public final class CustomPacketPayloadWrapper {
@SuppressWarnings("unused")
static final class CustomPacketPayloadInterceptionHandler {
public static void intercept(@FieldValue("payload") byte[] payload, @Argument(0) Object packetBuffer) {
WRITE_BYTES_METHOD.invoke(packetBuffer, payload, 0, payload.length);
((ByteBuf) packetBuffer).writeBytes(payload);
}
}
}

57
src/test/java/com/comphenix/protocol/events/PacketContainerTest.java
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@ -20,6 +20,7 @@ import io.netty.buffer.Unpooled;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
@ -58,7 +59,10 @@ import net.md_5.bungee.api.chat.ComponentBuilder;
import net.md_5.bungee.api.chat.HoverEvent;
import net.md_5.bungee.api.chat.hover.content.Text;
import net.minecraft.core.registries.BuiltInRegistries;
import net.minecraft.network.PacketDataSerializer;
import net.minecraft.network.protocol.common.ClientboundCustomPayloadPacket;
import net.minecraft.network.protocol.common.ServerboundCustomPayloadPacket;
import net.minecraft.network.protocol.common.custom.BrandPayload;
import net.minecraft.network.protocol.game.PacketPlayOutGameStateChange;
import net.minecraft.network.protocol.game.PacketPlayOutUpdateAttributes;
import net.minecraft.network.protocol.game.PacketPlayOutUpdateAttributes.AttributeSnapshot;
@ -416,6 +420,59 @@ public class PacketContainerTest {
Assertions.assertArrayEquals(payloadData, payloadWrapper.getPayload());
}
@Test
public void testCustomPayloadPacket() {
byte[] customPayload = "Hello World, This is A Super-Cool-Test!!!!!".getBytes(StandardCharsets.UTF_8);
com.comphenix.protocol.wrappers.MinecraftKey key = new com.comphenix.protocol.wrappers.MinecraftKey("protocollib", "test");
CustomPacketPayloadWrapper payloadWrapper = new CustomPacketPayloadWrapper(customPayload, key);
PacketContainer container = new PacketContainer(PacketType.Play.Server.CUSTOM_PAYLOAD);
container.getCustomPacketPayloads().write(0, payloadWrapper);
PacketDataSerializer serializer = new PacketDataSerializer(Unpooled.buffer());
ClientboundCustomPayloadPacket constructedHandle = (ClientboundCustomPayloadPacket) container.getHandle();
constructedHandle.a(serializer);
ServerboundCustomPayloadPacket deserializedHandle = new ServerboundCustomPayloadPacket(serializer);
PacketContainer serverContainer = new PacketContainer(PacketType.Play.Client.CUSTOM_PAYLOAD, deserializedHandle);
CustomPacketPayloadWrapper deserializedPayloadWrapper = serverContainer.getCustomPacketPayloads().read(0);
Assertions.assertEquals(key, deserializedPayloadWrapper.getId());
Assertions.assertArrayEquals(customPayload, deserializedPayloadWrapper.getPayload());
}
@Test
public void testSomeCustomPayloadRead() {
BrandPayload payload = new BrandPayload("Hello World!");
ClientboundCustomPayloadPacket handle = new ClientboundCustomPayloadPacket(payload);
PacketContainer container = new PacketContainer(PacketType.Play.Server.CUSTOM_PAYLOAD, handle);
CustomPacketPayloadWrapper payloadWrapper = container.getCustomPacketPayloads().read(0);
com.comphenix.protocol.wrappers.MinecraftKey payloadId = payloadWrapper.getId();
Assertions.assertEquals(BrandPayload.a.toString(), payloadId.getFullKey());
PacketDataSerializer serializer = new PacketDataSerializer(Unpooled.wrappedBuffer(payloadWrapper.getPayload()));
BrandPayload deserializedPayload = new BrandPayload(serializer);
Assertions.assertEquals(payload.b(), deserializedPayload.b());
}
@Test
public void testUnknownPayloadNotReleasedOnRead() {
MinecraftKey id = new MinecraftKey("plib", "main");
ByteBuf data = Unpooled.wrappedBuffer("This is a Test!!".getBytes(StandardCharsets.UTF_8));
ServerboundCustomPayloadPacket.UnknownPayload payload = new ServerboundCustomPayloadPacket.UnknownPayload(id, data);
ServerboundCustomPayloadPacket handle = new ServerboundCustomPayloadPacket(payload);
PacketContainer container = new PacketContainer(PacketType.Play.Client.CUSTOM_PAYLOAD, handle);
CustomPacketPayloadWrapper payloadWrapper = container.getCustomPacketPayloads().read(0);
Assertions.assertEquals(id.toString(), payloadWrapper.getId().getFullKey());
Assertions.assertEquals("This is a Test!!", new String(payloadWrapper.getPayload()));
Assertions.assertEquals(1, payload.data().refCnt());
Assertions.assertEquals(0, payload.data().readerIndex());
}
@Test
public void testIntList() {
PacketContainer destroy = new PacketContainer(PacketType.Play.Server.ENTITY_DESTROY);