[PATCH net-next] gtp: add initial driver for datapath of GPRS Tunneling Protocol (GTP-U)

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Harald Welte laforge at netfilter.org
Wed May 11 05:47:47 UTC 2016


Hi Sipos,

On Tue, May 10, 2016 at 11:30:19PM +0200, Sipos Csaba wrote:
> Maybe I am misunderstanding something, but I really don't see what is
> the reason behind handling the echo requests in the GGSN instead of
> the gtp-u stack itself. Can someone please shed some light on this
> one?

because when you send an ECHO request, you want to know if the full GTP
stack on the other side is still alive, both for control and for user
plane?  If you automatically replied to them from the kernel, it mihgt
be that just the user plane (kernel space) is still alive, while the
control plane (user space) is already dead?

-- 
- Harald Welte <laforge at netfilter.org>                 http://netfilter.org/
============================================================================
  "Fragmentation is like classful addressing -- an interesting early
   architectural error that shows how much experimentation was going
   on while IP was being designed."                    -- Paul Vixie



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