GeyserMC/Geyser
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Geyser
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Add position checker to prevent false movements 

Sometimes this caused bugs on servers and made anticheats go wild. This should resolve most of the movement issues regarding that.
This commit is contained in:
Redned 2019-09-15 20:25:16 -05:00 committed by RednedEpic
parent ef7800a739
commit fac7093bff
5 changed files with 89 additions and 24 deletions
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7
connector/src/main/java/org/geysermc/connector/entity/Entity.java
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@ -33,6 +33,7 @@ import com.nukkitx.protocol.bedrock.data.EntityFlag;
import com.nukkitx.protocol.bedrock.data.EntityFlags;
import com.nukkitx.protocol.bedrock.packet.AddEntityPacket;
import com.nukkitx.protocol.bedrock.packet.RemoveEntityPacket;
import com.nukkitx.protocol.bedrock.packet.SetEntityDataPacket;
import com.nukkitx.protocol.bedrock.packet.UpdateAttributesPacket;
import lombok.Getter;
import lombok.Setter;
@ -136,7 +137,6 @@ public class Entity {
this.movePending = true;
}
public EntityDataDictionary getMetadata() {
EntityFlags flags = new EntityFlags();
flags.setFlag(EntityFlag.HAS_GRAVITY, true);
@ -169,6 +169,11 @@ public class Entity {
updateAttributesPacket.setRuntimeEntityId(geyserId);
updateAttributesPacket.setAttributes(attributes);
session.getUpstream().sendPacket(updateAttributesPacket);
SetEntityDataPacket entityDataPacket = new SetEntityDataPacket();
entityDataPacket.setRuntimeEntityId(geyserId);
entityDataPacket.getMetadata().putAll(getMetadata());
session.getUpstream().sendPacket(entityDataPacket);
}
// To be used at a later date

3
connector/src/main/java/org/geysermc/connector/entity/type/EntityType.java
View File

@ -79,7 +79,8 @@ public enum EntityType {
AGENT(56, 0f),
VINDICATOR(57, 1.8f, 0.6f, 0.6f, 1.62f),
PILLAGER(114, 1.8f, 0.6f, 0.6f, 1.62f),
WANDERING_VILLAGER(118, 1.8f, 0.6f, 0.6f, 1.62f),
WANDERING_TRADER(118, 1.8f, 0.6f, 0.6f, 1.62f),
PHANTOM(58, 0.5f, 0.9f, 0.9f, 0.6f),
RAVAGER(59, 1.9f, 1.2f),
ARMOR_STAND(61, 0f),

53
connector/src/main/java/org/geysermc/connector/network/translators/bedrock/BedrockMovePlayerTranslator.java
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@ -25,9 +25,11 @@
package org.geysermc.connector.network.translators.bedrock;
import com.flowpowered.math.vector.Vector3f;
import com.github.steveice10.mc.protocol.data.game.entity.metadata.Position;
import com.github.steveice10.mc.protocol.packet.ingame.client.player.ClientPlayerPositionRotationPacket;
import com.nukkitx.protocol.bedrock.packet.MovePlayerPacket;
import com.nukkitx.protocol.bedrock.packet.SetEntityDataPacket;
import org.geysermc.connector.entity.Entity;
import org.geysermc.connector.entity.type.EntityType;
import org.geysermc.connector.network.session.GeyserSession;
@ -42,6 +44,15 @@ public class BedrockMovePlayerTranslator extends PacketTranslator<MovePlayerPack
if (entity == null)
return;
if (!session.isLoggedIn())
return;
if (!isValidMove(session, packet.getMode(), entity.getPosition(), packet.getPosition())) {
session.getConnector().getLogger().info("Recalculating position...");
recalculatePosition(session, entity, entity.getPosition());
return;
}
ClientPlayerPositionRotationPacket playerPositionRotationPacket = new ClientPlayerPositionRotationPacket(
packet.isOnGround(), packet.getPosition().getX(), Math.ceil((packet.getPosition().getY() - EntityType.PLAYER.getOffset()) * 2) / 2,
packet.getPosition().getZ(), packet.getRotation().getY(), packet.getRotation().getX());
@ -59,4 +70,46 @@ public class BedrockMovePlayerTranslator extends PacketTranslator<MovePlayerPack
if (!colliding)
session.getDownstream().getSession().send(playerPositionRotationPacket);
}
public boolean isValidMove(GeyserSession session, MovePlayerPacket.Mode mode, Vector3f currentPosition, Vector3f newPosition) {
if (mode != MovePlayerPacket.Mode.NORMAL)
return true;
double xRange = newPosition.getX() - currentPosition.getX();
double yRange = newPosition.getY() - currentPosition.getY();
double zRange = newPosition.getZ() - currentPosition.getZ();
if (xRange < 0)
xRange = -xRange;
if (yRange < 0)
yRange = -yRange;
if (zRange < 0)
zRange = -zRange;
if (xRange > 10 || yRange > 10 || zRange > 10) {
session.getConnector().getLogger().warning(session.getName() + " moved too quickly." +
" current position: " + currentPosition + ", new position: " + newPosition);
return false;
}
return true;
}
public void recalculatePosition(GeyserSession session, Entity entity, Vector3f currentPosition) {
// Gravity might need to be reset...
SetEntityDataPacket entityDataPacket = new SetEntityDataPacket();
entityDataPacket.setRuntimeEntityId(entity.getGeyserId());
entityDataPacket.getMetadata().putAll(entity.getMetadata());
session.getUpstream().sendPacket(entityDataPacket);
MovePlayerPacket movePlayerPacket = new MovePlayerPacket();
movePlayerPacket.setRuntimeEntityId(entity.getGeyserId());
movePlayerPacket.setPosition(entity.getPosition());
movePlayerPacket.setRotation(entity.getRotation());
movePlayerPacket.setMode(MovePlayerPacket.Mode.NORMAL);
movePlayerPacket.setOnGround(true);
entity.setMovePending(false);
session.getUpstream().sendPacket(movePlayerPacket);
}
}

32
connector/src/main/java/org/geysermc/connector/network/translators/java/JavaJoinGameTranslator.java
View File

@ -30,7 +30,13 @@ import com.github.steveice10.mc.protocol.data.game.entity.player.GameMode;
import com.github.steveice10.mc.protocol.packet.ingame.server.ServerJoinGamePacket;
import com.nukkitx.protocol.bedrock.packet.AdventureSettingsPacket;
import com.nukkitx.protocol.bedrock.packet.LevelChunkPacket;
import com.nukkitx.protocol.bedrock.packet.MovePlayerPacket;
import com.nukkitx.protocol.bedrock.packet.PlayStatusPacket;
import com.nukkitx.protocol.bedrock.packet.SetEntityDataPacket;
import com.nukkitx.protocol.bedrock.packet.SetPlayerGameTypePacket;
import org.geysermc.connector.console.GeyserLogger;
import org.geysermc.connector.entity.Entity;
import org.geysermc.connector.entity.type.EntityType;
import org.geysermc.connector.network.session.GeyserSession;
import org.geysermc.connector.network.translators.PacketTranslator;
import org.geysermc.connector.network.translators.TranslatorsInit;
@ -43,11 +49,6 @@ public class JavaJoinGameTranslator extends PacketTranslator<ServerJoinGamePacke
bedrockPacket.setUniqueEntityId(session.getPlayerEntity().getGeyserId());
session.getUpstream().sendPacketImmediately(bedrockPacket);
int gamemode = packet.getGameMode().ordinal();
SetPlayerGameTypePacket playerGameTypePacket = new SetPlayerGameTypePacket();
playerGameTypePacket.setGamemode(gamemode);
session.getUpstream().sendPacket(playerGameTypePacket);
Vector3f pos = new Vector3f(0, 0, 0);
int chunkX = pos.getFloorX() >> 4;
int chunkZ = pos.getFloorZ() >> 4;
@ -64,6 +65,25 @@ public class JavaJoinGameTranslator extends PacketTranslator<ServerJoinGamePacke
}
}
session.getJavaPacketCache().getCachedValues().put("java_join_packet", packet);
PlayStatusPacket playStatus = new PlayStatusPacket();
playStatus.setStatus(PlayStatusPacket.Status.LOGIN_SUCCESS);
session.getUpstream().sendPacketImmediately(playStatus);
Entity entity = session.getPlayerEntity();
if (entity == null)
return;
session.getPlayerEntity().setEntityId(packet.getEntityId());
SetPlayerGameTypePacket playerGameTypePacket = new SetPlayerGameTypePacket();
playerGameTypePacket.setGamemode(packet.getGameMode().ordinal());
session.getUpstream().sendPacket(playerGameTypePacket);
SetEntityDataPacket entityDataPacket = new SetEntityDataPacket();
entityDataPacket.setRuntimeEntityId(entity.getGeyserId());
entityDataPacket.getMetadata().putAll(entity.getMetadata());
session.getUpstream().sendPacket(entityDataPacket);
// session.setSpawned(true);
}
}

18
connector/src/main/java/org/geysermc/connector/network/translators/java/entity/player/JavaPlayerPositionRotationTranslator.java
View File

@ -27,12 +27,9 @@ package org.geysermc.connector.network.translators.java.entity.player;
import com.flowpowered.math.vector.Vector3f;
import com.github.steveice10.mc.protocol.packet.ingame.client.world.ClientTeleportConfirmPacket;
import com.github.steveice10.mc.protocol.packet.ingame.server.ServerJoinGamePacket;
import com.github.steveice10.mc.protocol.packet.ingame.server.entity.player.ServerPlayerPositionRotationPacket;
import com.nukkitx.protocol.bedrock.packet.MovePlayerPacket;
import com.nukkitx.protocol.bedrock.packet.PlayStatusPacket;
import com.nukkitx.protocol.bedrock.packet.SetEntityDataPacket;
import com.nukkitx.protocol.bedrock.packet.SetPlayerGameTypePacket;
import org.geysermc.connector.console.GeyserLogger;
import org.geysermc.connector.entity.Entity;
import org.geysermc.connector.entity.type.EntityType;
@ -51,30 +48,18 @@ public class JavaPlayerPositionRotationTranslator extends PacketTranslator<Serve
return;
if (!session.isSpawned()) {
ServerJoinGamePacket javaJoinPacket = (ServerJoinGamePacket) session.getJavaPacketCache().getCachedValues().remove("java_join_packet");
PlayStatusPacket playStatus = new PlayStatusPacket();
playStatus.setStatus(PlayStatusPacket.Status.LOGIN_SUCCESS);
session.getUpstream().sendPacketImmediately(playStatus);
entity.moveAbsolute(new Vector3f(packet.getX(), packet.getY() + EntityType.PLAYER.getOffset() + 0.1f, packet.getZ()), packet.getPitch(), packet.getYaw());
SetPlayerGameTypePacket playerGameTypePacket = new SetPlayerGameTypePacket();
playerGameTypePacket.setGamemode(javaJoinPacket.getGameMode().ordinal());
session.getUpstream().sendPacket(playerGameTypePacket);
SetEntityDataPacket entityDataPacket = new SetEntityDataPacket();
entityDataPacket.setRuntimeEntityId(entity.getGeyserId());
entityDataPacket.getMetadata().putAll(entity.getMetadata());
session.getUpstream().sendPacket(entityDataPacket);
session.getPlayerEntity().setEntityId(javaJoinPacket.getEntityId());
MovePlayerPacket movePlayerPacket = new MovePlayerPacket();
movePlayerPacket.setRuntimeEntityId(entity.getGeyserId());
movePlayerPacket.setPosition(new Vector3f(packet.getX(), packet.getY() + EntityType.PLAYER.getOffset() + 0.1f, packet.getZ()));
movePlayerPacket.setRotation(new Vector3f(packet.getPitch(), packet.getYaw(), 0));
movePlayerPacket.setMode(MovePlayerPacket.Mode.NORMAL);
movePlayerPacket.setMode(MovePlayerPacket.Mode.RESET);
movePlayerPacket.setOnGround(true);
entity.setMovePending(false);
@ -82,6 +67,7 @@ public class JavaPlayerPositionRotationTranslator extends PacketTranslator<Serve
session.setSpawned(true);
GeyserLogger.DEFAULT.info("Spawned player at " + packet.getX() + " " + packet.getY() + " " + packet.getZ());
return;
}
entity.moveAbsolute(new Vector3f(packet.getX(), packet.getY() + EntityType.PLAYER.getOffset() + 0.1f, packet.getZ()), packet.getPitch(), packet.getYaw());