On NGSetupFailure, before moving, we might have

    [NGAP]   Received NG setup failure for AMF... please check your parameters
    [NGAP]   Received NGSetupResponse from AMF

All over the GTP module, we use ntohl()/htonl() to convert between local
and network order. It seems to have been forgotten here.

For debugging, it might notably be useful to see the AMF UE NGAP ID. Log
it in the single Initial Context Setup message.

In the Initial Context Setup message, the NGAP forwards the AMF UE ID,
but not in the DL NAS Message, although 38.413 says, in $8.3.1.2 either

> The NG-RAN node shall use the AMF UE NGAP ID IE and RAN UE NGAP ID IE
> received in the INITIAL CONTEXT SETUP REQUEST message as identification
> of the logical connection

or in $8.6.2.2

> The NG-RAN node shall use the AMF UE NGAP ID IE and RAN UE NGAP ID IE
> received in the DOWNLINK NAS TRANSPORT message as identification of the
> logical connection

So forward in both cases for harmonization.

It might happen that the RRC does not know the AMF UE NGAP ID, yet. Even
in that case, we should forward the release request to the NGAP module,
which can either forward a message to the AMF, or reply back to release
the UE.
Reported-By: Jegor Zelenjak <jzelenjak@proton.me>

Integration: `2026.w02`

* !3828 L2 UE files code cleanup for static functions
* !3839 Couple rfsim fixes
* !3835 Correctly include cblas include directories for RHEL
* !3840 Fix missing return statements in SIB1 TDA validation
* !3836 move NTN UE L1 functions to a new file
* !3793 CI: Remove redundant Jenkinsfiles
* !3770 RRC UE: Implement proper NH chain synchronization for RRC Reestablishment
* !3843 fix(documentation): issue 1042
* !3842 Remove unused cmake_targets files
* !3832 Remove global iq_txshift and iq_rxrescale
* !3847 Minor CI and nr_ulsim reporting adjustments
* !3838 NR NGAP (N2HO) : Fix Time UE Stayed in Cell IE type and calculation
* !3677 Support prach with start symbol of PRACH not at symbol 0

Closes #1042 and #857

See merge request oai/openairinterface5g!3841

Support prach with start symbol of PRACH not at symbol 0

The following PRACH indice have been tested.

    index / format (nf mod x = y) / Subframe/ start_symbol /no_of_slot / occ / duration
    152     B4     2 1                4,9          0               2      1    12
    151     B4     2 1                4,9          2               1      1    12
    157     B4     1 0                 4           0               1      1    12
    159     B4     1 0                 9           0               1      1    12

NR NGAP (N2HO) : Fix Time UE Stayed in Cell IE type and calculation

According to 3GPP TS 38.413, the 'Time UE Stayed in Cell' IE is an
integer ranging from 0 to 4095. This patch updates the data structure
to reflect the correct bit width and implements the dynamic calculation
based on the UE's residence time.

- Change time_in_cell from long to uint16_t in ngap_messages_types.h.
- Replace dummy value with real-time calculation in rrc_gNB_NGAP.c.
- Implement a ceiling of 4095 to comply with the 12-bit protocol limit.

Ref: 3GPP TS 38.413 Section 9.3.1.97

Merge remote-tracking branch 'origin/fix-usage-iq_rxrescale-iq_txshift' into integration_2026_w02 (!3832)

Remove global iq_txshift and iq_rxrescale

iq_txshift and iq_rxrescale are defined but not used, this commit fixes it

Minor CI and nr_ulsim reporting adjustments

Remove unused cmake_targets files

See individual commits

fix(documentation): issue 1042

A merge conflict header was left by mistake in
openair1/PHY/CODING/DOC/LDPCImplementation.md

Closes #1042

Refactor key derivation logic to properly handle Next Hop (NH) chain
synchronization according to 3GPP TS 33.501 specifications for both RRC
Reestablishment and Master Key Update procedures.

Changes in rrc_gNB.c:
- Clarify key derivation in rrc_gNB_generate_RRCReestablishment by explicitly
  selecting base key (NH or KgNB) based on nh_ncc value
- Add comment explaining vertical vs horizontal derivation logic

Changes in rrc_UE.c:
Refactored the NH chain synchronization and key derivation code to match
TS 33.501 terminology:
- nr_sync_nh_chain(): Common helper to synchronize NH parameter chain per
  TS 33.501 Annex A.10, supporting both Master Key Update and RRC Reestablishment
  procedures
- nr_derive_kgnb_horizontal(): Derive KNG-RAN* from current KgNB when NCC values
  match (horizontal derivation per TS 33.501 A.11/A.12)
- nr_derive_kgnb_vertical(): Derive KNG-RAN* from synchronized NH after NH chain
  sync (vertical derivation per TS 33.501 A.11/A.12)
- nr_update_kgnb_from_ncc(): Unified function implementing TS 33.501 6.9.2.3.4
  logic for updating KgNB based on received nextHopChainingCount
- Refactor as_security_key_update(): Use new nr_update_kgnb_from_ncc() helper
  function for cleaner, more maintainable code
- Fix nr_rrc_ue_process_rrcReestablishment(): Properly handle received
  nextHopChainingCount and update KgNB using unified helper function
- Replaced the previous nr_rrc_nh_update() helper with these functions to
  improve clarity and alignment with the specification.
- Add debug logging for key derivation process

Key NAS deriver utils:
- update derive_kgnb documentation and protect input keys with const attribute

Closes #857

CI: Remove redundant Jenkinsfiles

All the removed files can be replaced by Jenkinsfile introduced in !3738

move NTN UE L1 functions to a new file

Moved from nr-ue not to overload that file with functions of a specific mode

Fix missing return statements in SIB1 TDA validation

Provides fix to commit d7cc1c2c in MR !3641 (merged).

Correctly include cblas include directories for RHEL

A merge conflict header was left by mistake in
`openair1/PHY/CODING/DOC/LDPCImplementation.md`

improve comments in usrp_lib.cpp

These files are not used anywhere. The only remaining cmake find files
are:

- findarmral and findxran: used by FHI7.2 driver
- findsctp: used by top-level CMakeLists.txt
- findgnutls: NOT actually used but GnuTLS is a dependency of websrv, so
  I leave it for the moment (should be removed if the webserver is
  removed)
Signed-off-by: Robert Schmidt <robert.schmidt@openairinterface.org>

There is no HSS/MME in this repository, which is the majority of this
file. Remove it, since it is outdated.
Signed-off-by: Robert Schmidt <robert.schmidt@openairinterface.org>

Setup routes was added by the author of FlexRAN. The UEs always set up
routes automatically, and this file is therefore not needed.

See-also: 287c1829 ("Remove FlexRAN")
Signed-off-by: Robert Schmidt <robert.schmidt@openairinterface.org>

According to 3GPP TS 38.413, the 'Time UE Stayed in Cell' IE is an
integer ranging from 0 to 4095. This patch updates the data structure
to reflect the correct bit width and implements the dynamic calculation
based on the UE's residence time.

- Change time_in_cell from long to uint16_t in ngap_messages_types.h.
- Replace dummy value with real-time calculation in rrc_gNB_NGAP.c.
- Implement a ceiling of 4095 to comply with the 12-bit protocol limit.

Ref: 3GPP TS 38.413 Section 9.3.1.97

Signed-off-by: Robert Schmidt <robert.schmidt@openairinterface.org>

RHEL uses a dedicated cblas include directory. Correctly include this
for the one target PHY_UE that relies on this.
Co-authored-by: Robert Schmidt <robert.schmidt@openairinterface.org>

Couple rfsim fixes

L2 UE files code cleanup for static functions

No functional change, just re-arranging code

Provides fix to commit d7cc1c2c (MR !3641).
Addresses an issue with low DL throughput in 100 MHz 2×2 test case observed
in CI.

Fix an issue caused by assuming C++ linkage of get_currentchannels_type