Netfilter Question - NF_QUEUE

[Sílvia Andreia Oliveira Rocha]

Hi,

My name is Sílvia and I'm beginning to study the NetFilter Architecture.

I've got a very simple question, I'd like to know more about the
NF_QUEUE hook.

It is said that this hook is usually used to pass information to
UserSpace, my question is, if somewhere a package is "popped" from the
skb and a NF_QUEUE isn't invoked afterwords is the package lost? I guess
it isn't, because a package is only drops on a NF_DROP verdict, but I'm
getting rather confused studying an application that uses NetFilter.

Thank U a lot for your attention,
Sílvia