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c9012298de30013ace9b877219d7dc8d368f98fa
openairinterface5g/openair2/RRC/NR/rrc_gNB_nsa.c
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mir c9012298de OSA SECU harmonization
2023-05-26 12:35:33 +02:00

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/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file rrc_gNB_nsa.c
* \brief rrc NSA procedures for gNB
* \author Raymond Knopp
* \date 2019
* \version 1.0
* \company Eurecom
* \email: raymond.knopp@eurecom.fr
*/
#include "nr_rrc_defs.h"
#include "NR_RRCReconfiguration.h"
#include "NR_UE-NR-Capability.h"
//#include "NR_UE-CapabilityRAT-ContainerList.h"
#include "LTE_UE-CapabilityRAT-ContainerList.h"
#include "NR_CellGroupConfig.h"
#include "NR_CG-Config.h"
//#include "NR_SRB-ToAddModList.h"
#include "openair2/LAYER2/NR_MAC_gNB/mac_proto.h"
#include "openair2/LAYER2/nr_rlc/nr_rlc_oai_api.h"
#include "openair2/RRC/LTE/rrc_eNB_GTPV1U.h"
#include "executables/softmodem-common.h"
#include "executables/nr-softmodem.h"
#include <openair2/RRC/NR/rrc_gNB_UE_context.h>
#include <openair3/ocp-gtpu/gtp_itf.h>
#include "openair3/SECU/secu_defs.h"
#include "openair3/SECU/key_nas_deriver.h"
#include <openair2/RRC/NR/nr_rrc_proto.h>
#include "nr_pdcp/nr_pdcp_oai_api.h"
#include "MESSAGES/asn1_msg.h"
void rrc_parse_ue_capabilities(gNB_RRC_INST *rrc, NR_UE_CapabilityRAT_ContainerList_t *UE_CapabilityRAT_ContainerList, x2ap_ENDC_sgnb_addition_req_t *m, NR_CG_ConfigInfo_IEs_t *cg_config_info)
{
OCTET_STRING_t *ueCapabilityRAT_Container_nr=NULL;
OCTET_STRING_t *ueCapabilityRAT_Container_MRDC=NULL;
asn_dec_rval_t dec_rval;
int list_size=0;
AssertFatal(UE_CapabilityRAT_ContainerList!=NULL,"UE_CapabilityRAT_ContainerList is null\n");
AssertFatal((list_size=UE_CapabilityRAT_ContainerList->list.count) >= 2, "UE_CapabilityRAT_ContainerList->list.size %d < 2\n",UE_CapabilityRAT_ContainerList->list.count);
for (int i=0; i<list_size; i++) {
if (UE_CapabilityRAT_ContainerList->list.array[i]->rat_Type == NR_RAT_Type_nr) ueCapabilityRAT_Container_nr = &UE_CapabilityRAT_ContainerList->list.array[i]->ue_CapabilityRAT_Container;
else if (UE_CapabilityRAT_ContainerList->list.array[i]->rat_Type == NR_RAT_Type_eutra_nr) ueCapabilityRAT_Container_MRDC = &UE_CapabilityRAT_ContainerList->list.array[i]->ue_CapabilityRAT_Container;
}
// decode and store capabilities
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_allocate_new_ue_context(rrc);
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
if (ueCapabilityRAT_Container_nr != NULL) {
dec_rval = uper_decode(NULL, &asn_DEF_NR_UE_NR_Capability, (void **)&UE->UE_Capability_nr, ueCapabilityRAT_Container_nr->buf, ueCapabilityRAT_Container_nr->size, 0, 0);
if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) {
LOG_E(RRC, "Failed to decode UE NR capabilities (%zu bytes) container size %lu\n", dec_rval.consumed,ueCapabilityRAT_Container_nr->size);
ASN_STRUCT_FREE(asn_DEF_NR_UE_NR_Capability, UE->UE_Capability_nr);
UE->UE_Capability_nr = 0;
AssertFatal(1==0,"exiting\n");
}
}
if (ueCapabilityRAT_Container_MRDC != NULL) {
dec_rval = uper_decode(NULL, &asn_DEF_NR_UE_MRDC_Capability, (void **)&UE->UE_Capability_MRDC, ueCapabilityRAT_Container_MRDC->buf, ueCapabilityRAT_Container_MRDC->size, 0, 0);
if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) {
LOG_E(RRC, "Failed to decode UE MRDC capabilities (%zu bytes)\n", dec_rval.consumed);
ASN_STRUCT_FREE(asn_DEF_NR_UE_MRDC_Capability, UE->UE_Capability_MRDC);
UE->UE_Capability_MRDC = 0;
AssertFatal(1==0,"exiting\n");
}
}
// dump ue_capabilities
if ( LOG_DEBUGFLAG(DEBUG_ASN1) && ueCapabilityRAT_Container_nr != NULL ) {
xer_fprint(stdout, &asn_DEF_NR_UE_NR_Capability, UE->UE_Capability_nr);
}
if ( LOG_DEBUGFLAG(DEBUG_ASN1) && ueCapabilityRAT_Container_MRDC != NULL ) {
xer_fprint(stdout, &asn_DEF_NR_UE_MRDC_Capability, UE->UE_Capability_MRDC);
}
LOG_A(NR_RRC, "Successfully decoded UE NR capabilities (NR and MRDC)\n");
UE->spCellConfig = calloc(1, sizeof(struct NR_SpCellConfig));
UE->spCellConfig->spCellConfigDedicated = rrc->configuration.scd;
LOG_I(NR_RRC,"Adding new NSA user (%p)\n",ue_context_p);
rrc_add_nsa_user(rrc,ue_context_p, m);
}
/* generate prototypes for the tree management functions (RB_INSERT used in rrc_add_nsa_user) */
RB_PROTOTYPE(rrc_nr_ue_tree_s, rrc_gNB_ue_context_s, entries,
rrc_gNB_compare_ue_rnti_id);
void rrc_add_nsa_user(gNB_RRC_INST *rrc, rrc_gNB_ue_context_t *ue_context_p, x2ap_ENDC_sgnb_addition_req_t *m)
{
AssertFatal(!get_softmodem_params()->sa, "%s() cannot be called in SA mode, it is intrinsically for NSA\n", __func__);
// generate nr-Config-r15 containers for LTE RRC : inside message for X2 EN-DC (CG-Config Message from 38.331)
rrc_gNB_carrier_data_t *carrier=&rrc->carrier;
const gNB_RrcConfigurationReq *configuration = &rrc->configuration;
MessageDef *msg;
msg = itti_alloc_new_message(TASK_RRC_ENB, 0, X2AP_ENDC_SGNB_ADDITION_REQ_ACK);
gtpv1u_enb_create_tunnel_req_t create_tunnel_req;
gtpv1u_enb_create_tunnel_resp_t create_tunnel_resp;
protocol_ctxt_t ctxt={0};
uint8_t kUPenc[16] = {0};
uint8_t kUPint[16] = {0};
int i;
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
// In case of phy-test and do-ra mode, read UE capabilities directly from file
if (get_softmodem_params()->phy_test == 1 || get_softmodem_params()->do_ra == 1) {
NR_UE_NR_Capability_t* UE_Capability_nr = NULL;
char UE_NR_Capability_xer[65536];
FILE *f = NULL;
if (uecap_file)
f = fopen(uecap_file, "r");
if(f){
size_t size = fread(UE_NR_Capability_xer, 1, sizeof UE_NR_Capability_xer, f);
if (size == 0 || size == sizeof UE_NR_Capability_xer)
LOG_E(NR_RRC,"UE Capabilities XER file %s is too large (%ld)\n", uecap_file, size);
else {
UE_Capability_nr = CALLOC(1,sizeof(NR_UE_NR_Capability_t));
asn_dec_rval_t dec_rval = xer_decode(0, &asn_DEF_NR_UE_NR_Capability, (void *)&UE_Capability_nr, UE_NR_Capability_xer, size);
assert(dec_rval.code == RC_OK);
xer_fprint(stdout,&asn_DEF_NR_UE_NR_Capability,(void *)UE_Capability_nr);
}
}
else
LOG_E(NR_RRC,"Could not open UE Capabilities input file. Not handling OAI UE Capabilities.\n");
UE->UE_Capability_nr = UE_Capability_nr;
}
// NR RRCReconfiguration
UE->reconfig = calloc(1, sizeof(NR_RRCReconfiguration_t));
memset((void *)UE->reconfig, 0, sizeof(NR_RRCReconfiguration_t));
UE->reconfig->rrc_TransactionIdentifier = 0;
UE->reconfig->criticalExtensions.present = NR_RRCReconfiguration__criticalExtensions_PR_rrcReconfiguration;
NR_RRCReconfiguration_IEs_t *reconfig_ies=calloc(1,sizeof(NR_RRCReconfiguration_IEs_t));
UE->reconfig->criticalExtensions.choice.rrcReconfiguration = reconfig_ies;
if (get_softmodem_params()->phy_test == 1 || get_softmodem_params()->do_ra == 1 || get_softmodem_params()->sa == 1){
UE->rb_config = get_default_rbconfig(10 /* EPS bearer ID */, 1 /* drb ID */, NR_CipheringAlgorithm_nea0, NR_SecurityConfig__keyToUse_master);
} else {
/* TODO: handle more than one bearer */
if (m == NULL) {
LOG_E(RRC, "fatal: m==NULL\n");
exit(1);
}
if (m->nb_e_rabs_tobeadded != 1) {
LOG_E(RRC, "fatal: m->nb_e_rabs_tobeadded = %d, should be 1\n", m->nb_e_rabs_tobeadded);
exit(1);
}
/* store security key and security capabilities */
memcpy(UE->kgnb, m->kgnb, 32);
UE->security_capabilities.nRencryption_algorithms = m->security_capabilities.encryption_algorithms;
UE->security_capabilities.nRintegrity_algorithms = m->security_capabilities.integrity_algorithms;
/* Select ciphering algorithm based on gNB configuration file and
* UE's supported algorithms.
* We take the first from the list that is supported by the UE.
* The ordering of the list comes from the configuration file.
*/
/* preset nea0 as fallback */
UE->ciphering_algorithm = 0;
for (i = 0; i < rrc->security.ciphering_algorithms_count; i++) {
int nea_mask[4] = {
0,
0x8000, /* nea1 */
0x4000, /* nea2 */
0x2000 /* nea3 */
};
if (rrc->security.ciphering_algorithms[i] == 0) {
/* nea0 already preselected */
break;
}
if (UE->security_capabilities.nRencryption_algorithms & nea_mask[rrc->security.ciphering_algorithms[i]]) {
UE->ciphering_algorithm = rrc->security.ciphering_algorithms[i];
break;
}
}
LOG_I(RRC, "selecting ciphering algorithm %d\n", (int)UE->ciphering_algorithm);
/* integrity: no integrity protection for DRB in ENDC mode
* as written in 38.331: "If UE is connected to E-UTRA/EPC, this field
* indicates the integrity protection algorithm to be used for SRBs
* configured with NR PDCP, as specified in TS 33.501"
* So nothing for DRB. Plus a test with a COTS UE revealed that it
* did not apply integrity on the DRB.
*/
UE->integrity_algorithm = 0;
LOG_I(RRC, "selecting integrity algorithm %d\n", UE->integrity_algorithm);
/* derive UP security key */
nr_derive_key(UP_ENC_ALG, UE->ciphering_algorithm, UE->kgnb, kUPenc);
nr_derive_key(UP_INT_ALG, UE->integrity_algorithm, UE->kgnb, kUPint);
e_NR_CipheringAlgorithm cipher_algo;
switch (UE->ciphering_algorithm) {
case 0:
cipher_algo = NR_CipheringAlgorithm_nea0;
break;
case 1:
cipher_algo = NR_CipheringAlgorithm_nea1;
break;
case 2:
cipher_algo = NR_CipheringAlgorithm_nea2;
break;
case 3:
cipher_algo = NR_CipheringAlgorithm_nea3;
break;
default:
LOG_E(RRC, "%s:%d:%s: fatal\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
UE->rb_config = get_default_rbconfig(m->e_rabs_tobeadded[0].e_rab_id, m->e_rabs_tobeadded[0].drb_ID, cipher_algo, NR_SecurityConfig__keyToUse_secondary);
}
NR_ServingCellConfig_t *scc = UE->spCellConfig ? UE->spCellConfig->spCellConfigDedicated : NULL;
UE->secondaryCellGroup = get_default_secondaryCellGroup(carrier->servingcellconfigcommon,
scc,
UE->UE_Capability_nr,
1,
1,
configuration,
ue_context_p->ue_context.gNB_ue_ngap_id);
AssertFatal(UE->secondaryCellGroup != NULL, "out of memory\n");
xer_fprint(stdout, &asn_DEF_NR_CellGroupConfig, UE->secondaryCellGroup);
fill_default_reconfig(carrier->servingcellconfigcommon, scc, reconfig_ies, UE->secondaryCellGroup, UE->UE_Capability_nr, configuration, ue_context_p->ue_context.gNB_ue_ngap_id);
// the UE context is not yet inserted in the RRC UE manager
// rrc_gNB_update_ue_context_rnti(UE->secondaryCellGroup->spCellConfig->reconfigurationWithSync->newUE_Identity, rrc,
// UE->gNB_ue_ngap_id);
UE->rnti = UE->secondaryCellGroup->spCellConfig->reconfigurationWithSync->newUE_Identity;
NR_CG_Config_t *CG_Config = calloc(1,sizeof(*CG_Config));
memset((void *)CG_Config,0,sizeof(*CG_Config));
// int CG_Config_size = generate_CG_Config(rrc,CG_Config,UE->reconfig,UE->rb_config);
generate_CG_Config(rrc, CG_Config, UE->reconfig, UE->rb_config);
if(m!=NULL) {
uint8_t inde_list[m->nb_e_rabs_tobeadded];
memset(inde_list, 0, m->nb_e_rabs_tobeadded*sizeof(uint8_t));
if (m->nb_e_rabs_tobeadded>0) {
for (int i=0; i<m->nb_e_rabs_tobeadded; i++) {
// Add the new E-RABs at the corresponding rrc ue context of the gNB
UE->e_rab[i].param.e_rab_id = m->e_rabs_tobeadded[i].e_rab_id;
UE->e_rab[i].param.gtp_teid = m->e_rabs_tobeadded[i].gtp_teid;
memcpy(&UE->e_rab[i].param.sgw_addr, &m->e_rabs_tobeadded[i].sgw_addr, sizeof(transport_layer_addr_t));
UE->nb_of_e_rabs++;
//Fill the required E-RAB specific information for the creation of the S1-U tunnel between the gNB and the SGW
create_tunnel_req.eps_bearer_id[i] = UE->e_rab[i].param.e_rab_id;
create_tunnel_req.sgw_S1u_teid[i] = UE->e_rab[i].param.gtp_teid;
memcpy(&create_tunnel_req.sgw_addr[i], &UE->e_rab[i].param.sgw_addr, sizeof(transport_layer_addr_t));
inde_list[i] = i;
LOG_I(RRC,"S1-U tunnel: index %d target sgw ip %d.%d.%d.%d length %d gtp teid %u\n",
i,
create_tunnel_req.sgw_addr[i].buffer[0],
create_tunnel_req.sgw_addr[i].buffer[1],
create_tunnel_req.sgw_addr[i].buffer[2],
create_tunnel_req.sgw_addr[i].buffer[3],
create_tunnel_req.sgw_addr[i].length,
create_tunnel_req.sgw_S1u_teid[i]);
}
create_tunnel_req.rnti = ue_context_p->ue_context.rnti;
create_tunnel_req.num_tunnels = m->nb_e_rabs_tobeadded;
RB_INSERT(rrc_nr_ue_tree_s, &RC.nrrrc[rrc->module_id]->rrc_ue_head, ue_context_p);
PROTOCOL_CTXT_SET_BY_MODULE_ID(&ctxt, rrc->module_id, GNB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0, rrc->module_id);
memset(&create_tunnel_resp, 0, sizeof(create_tunnel_resp));
if (!IS_SOFTMODEM_NOS1) {
LOG_D(RRC, "Calling gtpv1u_create_s1u_tunnel()\n");
gtpv1u_create_s1u_tunnel(ctxt.instance, &create_tunnel_req, &create_tunnel_resp, nr_pdcp_data_req_drb);
rrc_gNB_process_GTPV1U_CREATE_TUNNEL_RESP(
&ctxt,
&create_tunnel_resp,
&inde_list[0]);
}
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).nb_e_rabs_admitted_tobeadded = m->nb_e_rabs_tobeadded;
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).target_assoc_id = m->target_assoc_id;
for (int i = 0; i < UE->nb_of_e_rabs; i++) {
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].e_rab_id = UE->e_rab[i].param.e_rab_id;
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gtp_teid = create_tunnel_resp.enb_S1u_teid[i];
memcpy(&X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gnb_addr, &create_tunnel_resp.enb_addr, sizeof(transport_layer_addr_t));
//The length field in the X2AP targetting structure is expected in bits but the create_tunnel_resp returns the address length in bytes
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gnb_addr.length = create_tunnel_resp.enb_addr.length*8;
LOG_I(RRC,"S1-U create_tunnel_resp tunnel: index %d target gNB ip %d.%d.%d.%d length %d gtp teid %u\n",
i,
create_tunnel_resp.enb_addr.buffer[0],
create_tunnel_resp.enb_addr.buffer[1],
create_tunnel_resp.enb_addr.buffer[2],
create_tunnel_resp.enb_addr.buffer[3],
create_tunnel_resp.enb_addr.length,
create_tunnel_resp.enb_S1u_teid[i]);
LOG_I(RRC,"X2AP sGNB Addition Request: index %d target gNB ip %d.%d.%d.%d length %d gtp teid %u\n",
i,
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gnb_addr.buffer[0],
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gnb_addr.buffer[1],
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gnb_addr.buffer[2],
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gnb_addr.buffer[3],
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gnb_addr.length,
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gtp_teid);
}
} else
LOG_W(RRC, "No E-RAB to be added received from SgNB Addition Request message \n");
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).MeNB_ue_x2_id = m->ue_x2_id;
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).SgNB_ue_x2_id = UE->secondaryCellGroup->spCellConfig->reconfigurationWithSync->newUE_Identity;
//X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).rrc_buffer_size = CG_Config_size; //Need to verify correct value for the buffer_size
// Send to X2 entity to transport to MeNB
asn_enc_rval_t enc_rval = uper_encode_to_buffer(&asn_DEF_NR_CG_Config,
NULL,
(void *)CG_Config,
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).rrc_buffer,
sizeof(X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).rrc_buffer));
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).rrc_buffer_size = (enc_rval.encoded+7)>>3;
itti_send_msg_to_task(TASK_X2AP, ENB_MODULE_ID_TO_INSTANCE(0), msg); //Check right id instead of hardcoding
}
// configure MAC and RLC
bool ret = false;
if (get_softmodem_params()->phy_test) {
// phytest mode: we don't set up RA, etc
ret = nr_mac_add_test_ue(RC.nrmac[rrc->module_id] , ue_context_p->ue_context.rnti, ue_context_p->ue_context.secondaryCellGroup);
} else {
ret = nr_mac_prepare_ra_nsa_ue(RC.nrmac[rrc->module_id], ue_context_p->ue_context.rnti, ue_context_p->ue_context.secondaryCellGroup);
}
AssertFatal(ret, "cannot add NSA UE in MAC, aborting\n");
PROTOCOL_CTXT_SET_BY_MODULE_ID(&ctxt, rrc->module_id, GNB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0, rrc->module_id);
if (get_softmodem_params()->do_ra) ctxt.enb_flag = 0;
LOG_W(RRC,
"Calling RRC PDCP/RLC ASN1 request functions for protocol context %p with module_id %d, rnti %lx, frame %d, subframe %d eNB_index %d \n",
&ctxt,
ctxt.module_id,
ctxt.rntiMaybeUEid,
ctxt.frame,
ctxt.subframe,
ctxt.eNB_index);
nr_pdcp_add_drbs(ctxt.enb_flag,
ctxt.rntiMaybeUEid,
0,
ue_context_p->ue_context.rb_config->drb_ToAddModList,
(ue_context_p->ue_context.integrity_algorithm << 4) | ue_context_p->ue_context.ciphering_algorithm,
kUPenc,
kUPint,
ue_context_p->ue_context.secondaryCellGroup->rlc_BearerToAddModList);
// assume only a single bearer
const NR_DRB_ToAddModList_t *drb_list = ue_context_p->ue_context.rb_config->drb_ToAddModList;
DevAssert(drb_list->list.count == 1);
const NR_DRB_ToAddMod_t *drb = drb_list->list.array[0];
const struct NR_CellGroupConfig__rlc_BearerToAddModList *bearer_list =
ue_context_p->ue_context.secondaryCellGroup->rlc_BearerToAddModList;
const NR_RLC_BearerConfig_t *bearer = bearer_list->list.array[0];
DevAssert(bearer_list->list.count == 1);
DevAssert(drb->drb_Identity == bearer->servedRadioBearer->choice.drb_Identity);
nr_rlc_add_drb(ctxt.rntiMaybeUEid, drb->drb_Identity, bearer);
LOG_D(RRC, "%s:%d: done RRC PDCP/RLC ASN1 request for UE rnti %lx\n", __FUNCTION__, __LINE__, ctxt.rntiMaybeUEid);
}
void rrc_remove_nsa_user(gNB_RRC_INST *rrc, int rnti) {
protocol_ctxt_t ctxt;
rrc_gNB_ue_context_t *ue_context;
int e_rab;
LOG_D(RRC, "calling rrc_remove_nsa_user rnti %d\n", rnti);
PROTOCOL_CTXT_SET_BY_MODULE_ID(&ctxt, rrc->module_id, GNB_FLAG_YES, rnti, 0, 0, rrc->module_id);
ue_context = rrc_gNB_get_ue_context_by_rnti(rrc, rnti);
if (ue_context == NULL) {
LOG_W(RRC, "rrc_remove_nsa_user: rnti %d not found\n", rnti);
return;
}
nr_pdcp_remove_UE(ctxt.rntiMaybeUEid);
rrc_rlc_remove_ue(&ctxt);
// lock the scheduler before removing the UE. Note: mac_remove_nr_ue() checks
// that the scheduler is actually locked!
NR_SCHED_LOCK(&RC.nrmac[rrc->module_id]->sched_lock);
mac_remove_nr_ue(RC.nrmac[rrc->module_id], rnti);
NR_SCHED_UNLOCK(&RC.nrmac[rrc->module_id]->sched_lock);
gtpv1u_enb_delete_tunnel_req_t tmp={0};
tmp.rnti=rnti;
tmp.from_gnb=1;
LOG_D(RRC, "ue_context->ue_context.nb_of_e_rabs %d will be deleted for rnti %d\n", ue_context->ue_context.nb_of_e_rabs, rnti);
for (e_rab = 0; e_rab < ue_context->ue_context.nb_of_e_rabs; e_rab++) {
tmp.eps_bearer_id[tmp.num_erab++]= ue_context->ue_context.nsa_gtp_ebi[e_rab];
// erase data
ue_context->ue_context.nsa_gtp_teid[e_rab] = 0;
memset(&ue_context->ue_context.nsa_gtp_addrs[e_rab], 0, sizeof(ue_context->ue_context.nsa_gtp_addrs[e_rab]));
ue_context->ue_context.nsa_gtp_ebi[e_rab] = 0;
}
gtpv1u_delete_s1u_tunnel(rrc->module_id, &tmp);
/* remove context */
rrc_gNB_remove_ue_context(rrc, ue_context);
}
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