This first implementation uses libgtp to manage the GTPv1-U socket and
pdp contexts, as a proof of concept to have something working for now.
At a later step, it is expected to drop libgtp and use some adhoc code
to handle GTP-U.
Related: SYS#5516
Change-Id: I5a6f5dfc4e508c92adb35210b4dc576d64353366
The LLSK socket is an interface allowing thid-parties to implement and
hook their RLC/MAC/RRC stack to osmo-hnodbe, which takes care of
interconnection with the rest of the RAN and core network (Iuh, RTP,
GTP-U, etc.).
Related: SYS#5516
Change-Id: Icaabb2206d6f141d4fba47dedf71f8ec37e6257d
The higher level bits were used in originally imported hnb-test code in
order to control interaction with the HNBGW over the VTY. This is no
longer needed in osmo-hnodeb, as NAS is in layers above the ones being
handled by an hNodeB.
Regarding RANAP, most of it is going to be handled by the LowerLayer UD
socket peer to be introduced in the future, so we can drop most of it,
as in osmo-hnodeb we'll basically be speaking RUA to the HNBGW and
passing RANAP buffers transparently.
We keep the .c/.h files since some small helpers functions will be
ntroduced later on when adding support for the mentioned LL socket.
Related: SYS#5516
Change-Id: I6aae54734c1c4607beede19169f16bafe35b3a61
Pau Espin