Re: libnetfilter_queue : Parsing payload

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Thanks again, Duncan! Have a wonderful weekend.

On Sat, Feb 20, 2021 at 1:27 AM Duncan Roe <duncan_roe@xxxxxxxxxxxxxxx> wrote:
>
> On Fri, Feb 19, 2021 at 08:38:14AM -0700, Psyspy 22 wrote:
> > Hello,
> >
> > I am using the example in the library's git repo.
> >
> > 1. Do I need to copy the payload to another buffer? I saw a few
> > examples (using the deprecated API) that use pktb_alloc to allocate
> > memory and then copy payload to it.
>
> At the moment, yes.
> >
> > 2. How do I parse the payload? Let's say the IP and TCP headers. Can I
> > use the nfq_ip_get_hdr helper function or is it deprecated too?
>
> nfq_ip_get_hdr is part of the modern interface. Anything using struct pkt_buff
> is (the old ones use struct nfq_data).
>
> https://netfilter.org/projects/libnetfilter_queue/doxygen/html/modules.html
> documents all functions and whether they are deprecated
> >
> > Thanks,
> > psyspy
>
> Cheers ... Duncan.



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