Remove netlink code, and the PDCP_USE_NETLINK macro, as there is no
known use, it makes the code more complicated, and is simply "technical
debt".
In 4G PDCP, a subtle change has been introduced, in pdcp_module_init()
of pdcp.c. Looking at the diff of this commit, it can be seen that there
is now a new "else-if (ENB_NAS_USE_TUN_W_MBMS_BIT)" branch that is under
what was the "if (PDCP_USE_NETLINK)" branch, while the code fragment was
actually inside the "else" branch of PDCP_USE_NETLINK. This seems to be
necessary: previously, if we did not use noS1 mode and we don't use any
TUN (i.e., the eNB), the else block would set up this interface. It is
important that this interface is brought up, because if we omit it,
RFsim will not work. It seems to me that this interface will regularly
create some traffic; without it, RFsim will be blocked, and the UE
cannot connect.
In short, it seems to be important to have the MBMS interface, which
injects traffic in the RFsim side, which will unblock RFsim. The change
in pdcp_module_init() preserves the total changes of the if-else
(PDCP_USE_NETLINK).
Tests showed that we sometimes exceed the response window. In that case,
the UE cannot connect anymore, as do-ra uses contention-free RA, and
prefills a RA process. Avoid this by giving more time in the CI test.
Remove function pointers that were used in the past to implement the
F1(-U) interface in 4G, i.e., to have different functions to handle
split/monolithic operations. As we don't have F1 in 4G anymore (see
commit 9dc2282249), we don't need the
function pointers anymore.
On that occasion, rename the 5G functions by prepending nr_ to them;
this allows to refactor the interface in 5G further (which is not the
focus of this changeset).
Integration: `2024.w30`
See merge request oai/openairinterface5g!2877
* !2830 NR feature set update
* !2868 Fix support for USRP UHD Versions => 4.5.0.0
* !2870 fix(docker): base image for target oai-gnb-aw2s shall be jammy
* !2874 Fix memory leaks in gNB PDU Session Setup Request processing
* !2866 RRC: reject PDU sessions if security is not active
* !2829 Automatic update of USRP RX gain during initial search using --agc option
* !2878 USRP: add a T trace to record the TX IQ data on antenna 0
* !2633 Handle F1 Reset at DU, and ensure state re-init on F1Setup
* !2864 Fix an assert in power control
* !2754 Introduce gold sequence cache
38.473 requires to reset UE-related contexts in F1 Setup Request, so do
it.
However, avoid resetting UE states in phy_test: it has preconfigured UE
which we should not reset. Note that if NSA/phy-test used F1, we could
likely reset the UE state here, as the F1 UE context setup would come
afterwards.
Robert Schmidt