Linux Kernel Module program to obtain domain name from IP

[Kristofer Hallin]

There's a research project called Name Based Sockets where this have been
done.

Take a look at: https://www.sics.se/projects/name-based-sockets

If you search for name based sockets on Google you will find a kernel
module and user space code doing this.
On 8 Jul 2014 15:07, "Kristof Provost" <kristof at sigsegv.be> wrote:

> On 2014-07-08 20:19:09 (+0800), shhuiw <shhuiw at 163.com> wrote:
> > DNS loopkup should use UDP packet, and you have to construct UDP request
> > based on your captured IP addresses in your module.
> DNS can actually use both TCP and UDP.
>
> > And you have to use DNS server fallback lists and time-out control if
> some DNS
> > server cannot work well.
>
> Yeah. Doing DNS lookups (forward or reverse) is complicated.
> There's a dns_query function in the kernel (net/dns_resolver), which
> apparently upcalls into user space, but I'd avoid dealing with DNS in
> the kernel at all.
>
> Just pass the IP address to user space and let it deal with it. There
> are plenty of DNS libraries available. Odds are you need to pass the
> resulting information to user space anyway, so you're not really losing
> anything.
>
> What are you trying to accomplish anyway?
>
> Regards,
> Kristof
>
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