Attention is currently required from: neels, pespin. laforge has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-hnbgw/+/28816 )

Change subject: add ps_rab_ass FSM to map GTP via UPF ......................................................................

Patch Set 3:

(1 comment)

File include/osmocom/hnbgw/hnbgw.h:

https://gerrit.osmocom.org/c/osmo-hnbgw/+/28816/comment/68ef4966_d3888780 PS2, Line 193: /* Return true when the user configured GTP mapping to be enabled, by configuring a PFCP link to a UPF.

"Firstly to allow users to keep their current installations working": you mean non-working right? As […]

If a current setup without GTP-U proxy in SGSN (or HNBGW) is broken, then I think there is an unrelated bug that should be fixed. see https://projects.sysmocom.de/issues/5435#note-16

I really don't think we should *enforce* the use of a GTP-U proxy / upf. The only real reason to use it is in situations where thre is no transparent routing of IP packets between RAN and CN - which is basically the case in probably almost every larger-scale commercial network out there. Just in lab / private networks this is an option.