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Add translation blocking to prevent server-side mod detection #6348

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Add translation blocking to prevent server-side mod detection #6348

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53 changes: 53 additions & 0 deletions src/main/java/meteordevelopment/meteorclient/mixin/ClientPlayNetworkHandlerMixin.java
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,9 @@
import net.minecraft.entity.Entity;
import net.minecraft.entity.ItemEntity;
import net.minecraft.network.ClientConnection;
import net.minecraft.nbt.NbtCompound;
import net.minecraft.nbt.NbtList;
import net.minecraft.network.packet.s2c.common.ResourcePackSendS2CPacket;
import net.minecraft.network.packet.s2c.play.*;
import net.minecraft.util.math.Vec3d;
import net.minecraft.world.chunk.WorldChunk;
Expand Down Expand Up @@ -135,6 +138,56 @@ private void onItemPickupAnimation(ItemPickupAnimationS2CPacket packet, Callback
}
}

@Inject(method = "onBlockEntityUpdate", at = @At("HEAD"))
private void onBlockEntityUpdate(BlockEntityUpdateS2CPacket packet, CallbackInfo ci) {
NbtCompound nbt = packet.getNbt();
if (nbt != null) {
stripTranslateTags(nbt);
}
}

@Unique
private void stripTranslateTags(NbtCompound nbt) {
// Strip translate tags from sign NBT to prevent server-side translation detection
// This blocks servers from detecting mods by checking if translation keys of certan mods or clients are present if so they are present they are exposed to the server for having those mods or clients
if (nbt.contains("front_text")) {
nbt.getCompound("front_text").ifPresent(frontText -> {
if (frontText.contains("messages")) {
frontText.getList("messages").ifPresent(messages -> {
for (int i = 0; i < messages.size(); i++) {
messages.getCompound(i).ifPresent(message -> {
if (message.contains("translate")) {
message.remove("translate");
message.getString("fallback").ifPresent(fallback -> {
message.putString("text", fallback);
});
}
});
}
});
}
});
}
if (nbt.contains("back_text")) {
nbt.getCompound("back_text").ifPresent(backText -> {
if (backText.contains("messages")) {
backText.getList("messages").ifPresent(messages -> {
for (int i = 0; i < messages.size(); i++) {
messages.getCompound(i).ifPresent(message -> {
if (message.contains("translate")) {
message.remove("translate");
message.getString("fallback").ifPresent(fallback -> {
message.putString("text", fallback);
});
}
});
}
});
}
});
}
}

@Inject(method = "onPlayerPositionLook", at = @At("HEAD"))
private void onPlayerPositionLookHead(PlayerPositionLookS2CPacket packet, CallbackInfo ci,
@Share("noRotateYaw") LocalFloatRef yawRef,
Expand Down