Hi Andreas,
my kernel coding skills are getting a bit rusty (no pun intended), and I'll think others on this list are more capable to do so. But let me at least provide feedback from the "3GPP / GTP side":
On Mon, Jan 30, 2017 at 05:37:08PM +0100, Andreas Schultz wrote:
Having both GTPv0-U and GTPv1-U is not always desirable. Fallback from GTPv1-U to GTPv0-U was depreciated from 3GPP Rel-8 onwards. Post Rel-8 implementation are discuraged from listening on the v0 port (see 3GPP TS 29.281, Sect. 1).
I confirm this and I think the related change should be applied.
A future change will completely decouple the sockets from the network device. Till then, at least one of the sockets needs to be specified (either v0 or v1), the other is optional.
Makes sense.