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openairinterface5g/openair2/RRC/NR/rrc_gNB_NGAP.c
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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_NGAP.h
* \brief rrc NGAP procedures for gNB
* \author Yoshio INOUE, Masayuki HARADA
* \date 2020
* \version 0.1
* \email: yoshio.inoue@fujitsu.com,masayuki.harada@fujitsu.com
* (yoshio.inoue%40fujitsu.com%2cmasayuki.harada%40fujitsu.com)
*/
#include "rrc_gNB_NGAP.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
#include "rrc_eNB_S1AP.h"
#include "gnb_config.h"
#include "common/ran_context.h"
#include "asn1_conversions.h"
#include "intertask_interface.h"
#include "pdcp.h"
#include "pdcp_primitives.h"
#include "openair3/ocp-gtpu/gtp_itf.h"
#include <openair3/ocp-gtpu/gtp_itf.h>
#include "RRC/LTE/rrc_eNB_GTPV1U.h"
#include "RRC/NR/rrc_gNB_GTPV1U.h"
#include "S1AP_NAS-PDU.h"
#include "executables/softmodem-common.h"
#include "UTIL/OSA/osa_defs.h"
#include "ngap_gNB_defs.h"
#include "ngap_gNB_ue_context.h"
#include "ngap_gNB_management_procedures.h"
#include "NR_ULInformationTransfer.h"
#include "RRC/NR/MESSAGES/asn1_msg.h"
#include "NR_UERadioAccessCapabilityInformation.h"
#include "NR_UE-CapabilityRAT-ContainerList.h"
#include "NGAP_Cause.h"
#include "NGAP_CauseRadioNetwork.h"
#include "f1ap_messages_types.h"
extern RAN_CONTEXT_t RC;
/* Value to indicate an invalid UE initial id */
static const uint16_t UE_INITIAL_ID_INVALID = 0;
/* Masks for NGAP Encryption algorithms, NEA0 is always supported (not coded) */
static const uint16_t NGAP_ENCRYPTION_NEA1_MASK = 0x8000;
static const uint16_t NGAP_ENCRYPTION_NEA2_MASK = 0x4000;
static const uint16_t NGAP_ENCRYPTION_NEA3_MASK = 0x2000;
/* Masks for NGAP Integrity algorithms, NIA0 is always supported (not coded) */
static const uint16_t NGAP_INTEGRITY_NIA1_MASK = 0x8000;
static const uint16_t NGAP_INTEGRITY_NIA2_MASK = 0x4000;
static const uint16_t NGAP_INTEGRITY_NIA3_MASK = 0x2000;
#define INTEGRITY_ALGORITHM_NONE NR_IntegrityProtAlgorithm_nia0
/*! \fn uint16_t get_next_ue_initial_id(uint8_t mod_id)
*\brief provide an UE initial ID for NGAP initial communication.
*\param mod_id Instance ID of gNB.
*\return the UE initial ID.
*/
//------------------------------------------------------------------------------
static uint16_t
get_next_ue_initial_id(
const module_id_t mod_id
)
//------------------------------------------------------------------------------
{
static uint16_t ue_initial_id[NUMBER_OF_gNB_MAX];
ue_initial_id[mod_id]++;
/* Never use UE_INITIAL_ID_INVALID this is the invalid id! */
if (ue_initial_id[mod_id] == UE_INITIAL_ID_INVALID) {
ue_initial_id[mod_id]++;
}
return ue_initial_id[mod_id];
}
//------------------------------------------------------------------------------
/*
* Get the UE NG struct containing hashtables NG_id/UE_id.
* Is also used to set the NG_id of the UE, depending on inputs.
*/
struct rrc_ue_ngap_ids_s *
rrc_gNB_NGAP_get_ue_ids(
gNB_RRC_INST *const rrc_instance_pP,
const uint16_t ue_initial_id,
const uint32_t gNB_ue_ngap_idP
)
//------------------------------------------------------------------------------
{
rrc_ue_ngap_ids_t *result = NULL;
rrc_ue_ngap_ids_t *result2 = NULL;
/*****************************/
instance_t instance = 0;
ngap_gNB_instance_t *ngap_gNB_instance_p = NULL;
ngap_gNB_ue_context_t *ue_desc_p = NULL;
rrc_gNB_ue_context_t *ue_context_p = NULL;
/*****************************/
hashtable_rc_t h_rc;
if (ue_initial_id != UE_INITIAL_ID_INVALID) {
h_rc = hashtable_get(rrc_instance_pP->initial_id2_ngap_ids, (hash_key_t)ue_initial_id, (void **)&result);
if (h_rc == HASH_TABLE_OK) {
if (gNB_ue_ngap_idP > 0) {
h_rc = hashtable_get(rrc_instance_pP->ngap_id2_ngap_ids, (hash_key_t)gNB_ue_ngap_idP, (void **)&result2);
if (h_rc != HASH_TABLE_OK) { // this case is equivalent to associate gNB_ue_ngap_idP and ue_initial_id
result2 = malloc(sizeof(*result2));
if (NULL != result2) {
*result2 = *result;
result2->gNB_ue_ngap_id = gNB_ue_ngap_idP;
result->gNB_ue_ngap_id = gNB_ue_ngap_idP;
h_rc = hashtable_insert(rrc_instance_pP->ngap_id2_ngap_ids, (hash_key_t)gNB_ue_ngap_idP, result2);
if (h_rc != HASH_TABLE_OK) {
LOG_E(NGAP, "[gNB %ld] Error while hashtable_insert in ngap_id2_ngap_ids gNB_ue_ngap_idP %"PRIu32"\n",
rrc_instance_pP - RC.nrrrc[0],
gNB_ue_ngap_idP);
}
}
} else { // here we should check that the association was done correctly
if ((result->ue_initial_id != result2->ue_initial_id) || (result->gNB_ue_ngap_id != result2->gNB_ue_ngap_id)) {
LOG_E(NGAP, "[gNB %ld] Error while hashtable_get, two rrc_ue_ngap_ids_t that should be equal, are not:\n \
ue_initial_id 1 = %"PRIu16",\n \
ue_initial_id 2 = %"PRIu16",\n \
gNB_ue_ngap_idP 1 = %"PRIu32",\n \
gNB_ue_ngap_idP 2 = %"PRIu32"\n",
rrc_instance_pP - RC.nrrrc[0],
result->ue_initial_id,
result2->ue_initial_id,
result->gNB_ue_ngap_id,
result2->gNB_ue_ngap_id);
// Still return *result
}
}
} // end if if (gNB_ue_ngap_idP > 0)
} else { // end if (h_rc == HASH_TABLE_OK)
LOG_E(NGAP, "[gNB %ld] In hashtable_get, couldn't find in initial_id2_ngap_ids ue_initial_id %"PRIu16"\n",
rrc_instance_pP - RC.nrrrc[0],
ue_initial_id);
return NULL;
/*
* At the moment this is written, this case shouldn't (cannot) happen and is equivalent to an error.
* One could try to find the struct instance based on ngap_id2_ngap_ids and gNB_ue_ngap_idP (if > 0),
* but this behavior is not expected at the moment.
*/
} // end else (h_rc != HASH_TABLE_OK)
} else { // end if (ue_initial_id != UE_INITIAL_ID_INVALID)
if (gNB_ue_ngap_idP > 0) {
h_rc = hashtable_get(rrc_instance_pP->ngap_id2_ngap_ids, (hash_key_t)gNB_ue_ngap_idP, (void **)&result);
if (h_rc != HASH_TABLE_OK) {
/*
* This case is uncommon, but can happen when:
* -> if the first NAS message was a Detach Request (non exhaustiv), the UE RRC context exist
* but is not associated with gNB_ue_ngap_id
* -> ... (?)
*/
LOG_E(NGAP, "[gNB %ld] In hashtable_get, couldn't find in ngap_id2_ngap_ids gNB_ue_ngap_idP %"PRIu32", trying to find it through NGAP context\n",
rrc_instance_pP - RC.nrrrc[0],
gNB_ue_ngap_idP);
instance = GNB_MODULE_ID_TO_INSTANCE(rrc_instance_pP - RC.nrrrc[0]); // get gNB instance
ngap_gNB_instance_p = ngap_gNB_get_instance(instance); // get ngap_gNB_instance
if (ngap_gNB_instance_p != NULL) {
ue_desc_p = ngap_gNB_get_ue_context(ngap_gNB_instance_p, gNB_ue_ngap_idP); // get s1ap_eNB_ue_context
} else {
LOG_E(NGAP, "[gNB instance %ld] Couldn't find the gNB NGAP context\n",
instance);
return NULL;
}
if (ue_desc_p != NULL) {
struct ngap_gNB_ue_context_s *ngap_ue_context_p = NULL;
if ((ngap_ue_context_p = RB_REMOVE(ngap_ue_map, &ngap_gNB_instance_p->ngap_ue_head, ue_desc_p)) != NULL) {
LOG_E(NR_RRC, "Removed UE context gNB_ue_ngap_id %u\n", ngap_ue_context_p->gNB_ue_ngap_id);
ngap_gNB_free_ue_context(ngap_ue_context_p);
} else {
LOG_E(NR_RRC, "Removing UE context gNB_ue_ngap_id %u: did not find context\n",ue_desc_p->gNB_ue_ngap_id);
}
return NULL; //skip the operation below to avoid loop
result = rrc_gNB_NGAP_get_ue_ids(rrc_instance_pP, ue_desc_p->ue_initial_id, gNB_ue_ngap_idP);
if (ue_desc_p->ue_initial_id != UE_INITIAL_ID_INVALID) {
result = rrc_gNB_NGAP_get_ue_ids(rrc_instance_pP, ue_desc_p->ue_initial_id, gNB_ue_ngap_idP);
if (result != NULL) {
ue_context_p = rrc_gNB_get_ue_context(RC.nrrrc[GNB_INSTANCE_TO_MODULE_ID(instance)], result->ue_rnti);
if ((ue_context_p != NULL) && (ue_context_p->ue_context.gNB_ue_ngap_id == 0)) {
ue_context_p->ue_context.gNB_ue_ngap_id = gNB_ue_ngap_idP;
} else {
LOG_E(NR_RRC, "[gNB %ld] Incoherence between RRC context and NGAP context (%d != %d) for UE RNTI %d or UE RRC context doesn't exist\n",
rrc_instance_pP - RC.nrrrc[0],
(ue_context_p==NULL)?99999:ue_context_p->ue_context.gNB_ue_ngap_id,
gNB_ue_ngap_idP,
result->ue_rnti);
}
}
} else {
LOG_E(NGAP, "[gNB %ld] NGAP context found but ue_initial_id is invalid (0)\n", rrc_instance_pP - RC.nrrrc[0]);
return NULL;
}
} else {
LOG_E(NGAP, "[gNB %ld] In hashtable_get, couldn't find in ngap_id2_ngap_ids gNB_ue_ngap_idP %"PRIu32", because ue_initial_id is invalid in NGAP context\n",
rrc_instance_pP - RC.nrrrc[0],
gNB_ue_ngap_idP);
return NULL;
}
} // end if (h_rc != HASH_TABLE_OK)
} // end if (gNB_ue_ngap_idP > 0)
} // end else (ue_initial_id == UE_INITIAL_ID_INVALID)
return result;
}
//------------------------------------------------------------------------------
static struct rrc_gNB_ue_context_s *
rrc_gNB_get_ue_context_from_ngap_ids(
const instance_t instanceP,
const uint16_t ue_initial_idP,
const uint32_t gNB_ue_ngap_idP
)
//------------------------------------------------------------------------------
{
rrc_ue_ngap_ids_t *temp = NULL;
temp = rrc_gNB_NGAP_get_ue_ids(RC.nrrrc[GNB_INSTANCE_TO_MODULE_ID(instanceP)], ue_initial_idP, gNB_ue_ngap_idP);
if (temp != NULL) {
return rrc_gNB_get_ue_context(RC.nrrrc[GNB_INSTANCE_TO_MODULE_ID(instanceP)], temp->ue_rnti);
}
return NULL;
}
/*! \fn void process_gNB_security_key (const protocol_ctxt_t* const ctxt_pP, eNB_RRC_UE_t * const ue_context_pP, uint8_t *security_key)
*\brief save security key.
*\param ctxt_pP Running context.
*\param ue_context_pP UE context.
*\param security_key_pP The security key received from NGAP.
*/
//------------------------------------------------------------------------------
void process_gNB_security_key (
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *const ue_context_pP,
uint8_t *security_key_pP
)
//------------------------------------------------------------------------------
{
char ascii_buffer[65];
uint8_t i;
/* Saves the security key */
memcpy (ue_context_pP->ue_context.kgnb, security_key_pP, SECURITY_KEY_LENGTH);
memset (ue_context_pP->ue_context.nh, 0, SECURITY_KEY_LENGTH);
ue_context_pP->ue_context.nh_ncc = -1;
for (i = 0; i < 32; i++) {
sprintf(&ascii_buffer[2 * i], "%02X", ue_context_pP->ue_context.kgnb[i]);
}
ascii_buffer[2 * i] = '\0';
LOG_I(NR_RRC, "[gNB %d][UE %x] Saved security key %s\n", ctxt_pP->module_id, ue_context_pP->ue_context.rnti, ascii_buffer);
}
//------------------------------------------------------------------------------
void
nr_rrc_pdcp_config_security(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *const ue_context_pP,
const uint8_t enable_ciphering
)
//------------------------------------------------------------------------------
{
NR_SRB_ToAddModList_t *SRB_configList = ue_context_pP->ue_context.SRB_configList;
(void)SRB_configList;
uint8_t *kRRCenc = NULL;
uint8_t *kRRCint = NULL;
uint8_t *kUPenc = NULL;
//uint8_t *k_kdf = NULL;
static int print_keys= 1;
/* Derive the keys from kgnb */
if (SRB_configList != NULL) {
nr_derive_key_up_enc(ue_context_pP->ue_context.ciphering_algorithm,
ue_context_pP->ue_context.kgnb,
&kUPenc);
}
nr_derive_key_rrc_enc(ue_context_pP->ue_context.ciphering_algorithm,
ue_context_pP->ue_context.kgnb,
&kRRCenc);
nr_derive_key_rrc_int(ue_context_pP->ue_context.integrity_algorithm,
ue_context_pP->ue_context.kgnb,
&kRRCint);
if (!IS_SOFTMODEM_IQPLAYER) {
SET_LOG_DUMP(DEBUG_SECURITY) ;
}
if ( LOG_DUMPFLAG( DEBUG_SECURITY ) ) {
if (print_keys == 1 ) {
print_keys =0;
LOG_DUMPMSG(NR_RRC, DEBUG_SECURITY, ue_context_pP->ue_context.kgnb, 32,"\nKgNB:" );
LOG_DUMPMSG(NR_RRC, DEBUG_SECURITY, kRRCenc, 16,"\nKRRCenc:" );
LOG_DUMPMSG(NR_RRC, DEBUG_SECURITY, kRRCint, 16,"\nKRRCint:" );
}
}
pdcp_config_set_security(
ctxt_pP,
NULL, /* pdcp_pP not used anymore in NR */
DCCH,
DCCH+2,
enable_ciphering ?
ue_context_pP->ue_context.ciphering_algorithm
| (ue_context_pP->ue_context.integrity_algorithm << 4)
: 0
| (ue_context_pP->ue_context.integrity_algorithm << 4),
kRRCenc,
kRRCint,
kUPenc);
}
//------------------------------------------------------------------------------
/*
* Initial UE NAS message on S1AP.
*/
void
rrc_gNB_send_NGAP_NAS_FIRST_REQ(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *ue_context_pP,
NR_RRCSetupComplete_IEs_t *rrcSetupComplete
)
//------------------------------------------------------------------------------
{
// gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
MessageDef *message_p = NULL;
rrc_ue_ngap_ids_t *rrc_ue_ngap_ids_p = NULL;
hashtable_rc_t h_rc;
message_p = itti_alloc_new_message(TASK_RRC_GNB, 0, NGAP_NAS_FIRST_REQ);
memset(&message_p->ittiMsg.ngap_nas_first_req, 0, sizeof(ngap_nas_first_req_t));
ue_context_pP->ue_context.ue_initial_id = get_next_ue_initial_id(ctxt_pP->module_id);
NGAP_NAS_FIRST_REQ(message_p).ue_initial_id = ue_context_pP->ue_context.ue_initial_id;
rrc_ue_ngap_ids_p = malloc(sizeof(rrc_ue_ngap_ids_t));
rrc_ue_ngap_ids_p->ue_initial_id = ue_context_pP->ue_context.ue_initial_id;
rrc_ue_ngap_ids_p->gNB_ue_ngap_id = UE_INITIAL_ID_INVALID;
rrc_ue_ngap_ids_p->ue_rnti = ctxt_pP->rntiMaybeUEid;
h_rc = hashtable_insert(RC.nrrrc[ctxt_pP->module_id]->initial_id2_ngap_ids,
(hash_key_t)ue_context_pP->ue_context.ue_initial_id,
rrc_ue_ngap_ids_p);
if (h_rc != HASH_TABLE_OK) {
LOG_E(NGAP, "[gNB %d] Error while hashtable_insert in initial_id2_ngap_ids ue_initial_id %u\n",
ctxt_pP->module_id,
ue_context_pP->ue_context.ue_initial_id);
}
/* Assume that cause is coded in the same way in RRC and NGap, just check that the value is in NGap range */
AssertFatal(ue_context_pP->ue_context.establishment_cause < NGAP_RRC_CAUSE_LAST,
"Establishment cause invalid (%jd/%d) for gNB %d!",
ue_context_pP->ue_context.establishment_cause,
NGAP_RRC_CAUSE_LAST,
ctxt_pP->module_id);
NGAP_NAS_FIRST_REQ(message_p).establishment_cause = ue_context_pP->ue_context.establishment_cause;
/* Forward NAS message */
NGAP_NAS_FIRST_REQ(message_p).nas_pdu.buffer = rrcSetupComplete->dedicatedNAS_Message.buf;
NGAP_NAS_FIRST_REQ(message_p).nas_pdu.length = rrcSetupComplete->dedicatedNAS_Message.size;
// extract_imsi(NGAP_NAS_FIRST_REQ (message_p).nas_pdu.buffer,
// NGAP_NAS_FIRST_REQ (message_p).nas_pdu.length,
// ue_context_pP);
/* Fill UE identities with available information */
NGAP_NAS_FIRST_REQ(message_p).ue_identity.presenceMask = NGAP_UE_IDENTITIES_NONE;
/* Fill s-TMSI */
NGAP_NAS_FIRST_REQ(message_p).ue_identity.s_tmsi.amf_set_id = ue_context_pP->ue_context.Initialue_identity_5g_s_TMSI.amf_set_id;
NGAP_NAS_FIRST_REQ(message_p).ue_identity.s_tmsi.amf_pointer = ue_context_pP->ue_context.Initialue_identity_5g_s_TMSI.amf_pointer;
NGAP_NAS_FIRST_REQ(message_p).ue_identity.s_tmsi.m_tmsi = ue_context_pP->ue_context.Initialue_identity_5g_s_TMSI.fiveg_tmsi;
/* selected_plmn_identity: IE is 1-based, convert to 0-based (C array) */
int selected_plmn_identity = rrcSetupComplete->selectedPLMN_Identity - 1;
NGAP_NAS_FIRST_REQ(message_p).selected_plmn_identity = selected_plmn_identity;
if (rrcSetupComplete->registeredAMF != NULL) {
NR_RegisteredAMF_t *r_amf = rrcSetupComplete->registeredAMF;
NGAP_NAS_FIRST_REQ(message_p).ue_identity.presenceMask |= NGAP_UE_IDENTITIES_guami;
if (r_amf->plmn_Identity != NULL) {
if ((r_amf->plmn_Identity->mcc != NULL) && (r_amf->plmn_Identity->mcc->list.count > 0)) {
/* Use first indicated PLMN MCC if it is defined */
NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.mcc = *r_amf->plmn_Identity->mcc->list.array[selected_plmn_identity];
LOG_I(NGAP, "[gNB %d] Build NGAP_NAS_FIRST_REQ adding in s_TMSI: GUMMEI MCC %u ue %x\n",
ctxt_pP->module_id,
NGAP_NAS_FIRST_REQ (message_p).ue_identity.guami.mcc,
ue_context_pP->ue_context.rnti);
}
if (r_amf->plmn_Identity->mnc.list.count > 0) {
/* Use first indicated PLMN MNC if it is defined */
NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.mnc = *r_amf->plmn_Identity->mnc.list.array[selected_plmn_identity];
LOG_I(NGAP, "[gNB %d] Build NGAP_NAS_FIRST_REQ adding in s_TMSI: GUMMEI MNC %u ue %x\n",
ctxt_pP->module_id,
NGAP_NAS_FIRST_REQ (message_p).ue_identity.guami.mnc,
ue_context_pP->ue_context.rnti);
}
} else {
/* TODO */
}
/* amf_Identifier */
uint32_t amf_Id = BIT_STRING_to_uint32(&r_amf->amf_Identifier);
NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.amf_region_id = amf_Id >> 16;
NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.amf_set_id = ue_context_pP->ue_context.Initialue_identity_5g_s_TMSI.amf_set_id;
NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.amf_pointer = ue_context_pP->ue_context.Initialue_identity_5g_s_TMSI.amf_pointer;
ue_context_pP->ue_context.ue_guami.mcc = NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.mcc;
ue_context_pP->ue_context.ue_guami.mnc = NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.mnc;
ue_context_pP->ue_context.ue_guami.mnc_len = NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.mnc_len;
ue_context_pP->ue_context.ue_guami.amf_region_id = NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.amf_region_id;
ue_context_pP->ue_context.ue_guami.amf_set_id = NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.amf_set_id;
ue_context_pP->ue_context.ue_guami.amf_pointer = NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.amf_pointer;
LOG_I(NGAP, "[gNB %d] Build NGAP_NAS_FIRST_REQ adding in s_TMSI: GUAMI amf_set_id %u amf_region_id %u ue %x\n",
ctxt_pP->module_id,
NGAP_NAS_FIRST_REQ (message_p).ue_identity.guami.amf_set_id,
NGAP_NAS_FIRST_REQ (message_p).ue_identity.guami.amf_region_id,
ue_context_pP->ue_context.rnti);
}
itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, message_p);
}
//------------------------------------------------------------------------------
int
rrc_gNB_process_NGAP_INITIAL_CONTEXT_SETUP_REQ(
MessageDef *msg_p,
const char *msg_name,
instance_t instance
)
//------------------------------------------------------------------------------
{
uint16_t ue_initial_id;
uint32_t gNB_ue_ngap_id;
rrc_gNB_ue_context_t *ue_context_p = NULL;
protocol_ctxt_t ctxt={0};
uint8_t pdu_sessions_done = 0;
gtpv1u_gnb_create_tunnel_resp_t create_tunnel_resp;
uint8_t inde_list[NR_NB_RB_MAX - 3]= {0};
int ret = 0;
ue_initial_id = NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).ue_initial_id;
gNB_ue_ngap_id = NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).gNB_ue_ngap_id;
ue_context_p = rrc_gNB_get_ue_context_from_ngap_ids(instance, ue_initial_id, gNB_ue_ngap_id);
LOG_I(NR_RRC, "[gNB %ld] Received %s: ue_initial_id %d, gNB_ue_ngap_id %u \n",
instance, msg_name, ue_initial_id, gNB_ue_ngap_id);
if (ue_context_p == NULL) {
/* Can not associate this message to an UE index, send a failure to NGAP and discard it! */
MessageDef *msg_fail_p = NULL;
LOG_W(NR_RRC, "[gNB %ld] In NGAP_INITIAL_CONTEXT_SETUP_REQ: unknown UE from NGAP ids (%d, %u)\n", instance, ue_initial_id, gNB_ue_ngap_id);
msg_fail_p = itti_alloc_new_message (TASK_RRC_GNB, 0, NGAP_INITIAL_CONTEXT_SETUP_FAIL);
NGAP_INITIAL_CONTEXT_SETUP_FAIL (msg_fail_p).gNB_ue_ngap_id = gNB_ue_ngap_id;
// TODO add failure cause when defined!
itti_send_msg_to_task (TASK_NGAP, instance, msg_fail_p);
return (-1);
} else {
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, GNB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
ue_context_p->ue_context.gNB_ue_ngap_id = NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).gNB_ue_ngap_id;
ue_context_p->ue_context.amf_ue_ngap_id = NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).amf_ue_ngap_id;
ue_context_p->ue_context.nas_pdu_flag = NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).nas_pdu_flag;
uint8_t nb_pdusessions_tosetup = NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).nb_of_pdusessions;
if (nb_pdusessions_tosetup != 0) {
gtpv1u_gnb_create_tunnel_req_t create_tunnel_req={0};
for (int i = 0; i < NR_NB_RB_MAX - 3; i++) {
if(ue_context_p->ue_context.pduSession[i].status >= PDU_SESSION_STATUS_DONE)
continue;
ue_context_p->ue_context.pduSession[i].status = PDU_SESSION_STATUS_NEW;
ue_context_p->ue_context.pduSession[i].param = NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).pdusession_param[pdu_sessions_done];
create_tunnel_req.pdusession_id[pdu_sessions_done] = NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).pdusession_param[pdu_sessions_done].pdusession_id;
create_tunnel_req.incoming_rb_id[pdu_sessions_done] = i+1;
create_tunnel_req.outgoing_teid[pdu_sessions_done] = NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).pdusession_param[pdu_sessions_done].gtp_teid;
// To be developped: hardcoded first flow
create_tunnel_req.outgoing_qfi[pdu_sessions_done] = NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).pdusession_param[pdu_sessions_done].qos[0].qfi;
create_tunnel_req.dst_addr[pdu_sessions_done].length = NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).pdusession_param[pdu_sessions_done].upf_addr.length;
memcpy(create_tunnel_req.dst_addr[pdu_sessions_done].buffer,
NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).pdusession_param[pdu_sessions_done].upf_addr.buffer,
sizeof(uint8_t)*20);
LOG_I(NR_RRC, "PDUSESSION SETUP: local index %d teid %u, pdusession id %d \n",
i,
create_tunnel_req.outgoing_teid[pdu_sessions_done],
create_tunnel_req.pdusession_id[pdu_sessions_done]);
inde_list[pdu_sessions_done] = i;
pdu_sessions_done++;
if(pdu_sessions_done >= nb_pdusessions_tosetup) {
break;
}
}
ue_context_p->ue_context.nb_of_pdusessions = NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).nb_of_pdusessions;
create_tunnel_req.ue_id = ue_context_p->ue_context.rnti;
create_tunnel_req.num_tunnels = pdu_sessions_done;
ret = gtpv1u_create_ngu_tunnel(
instance,
&create_tunnel_req,
&create_tunnel_resp);
if (ret != 0) {
LOG_E(NR_RRC,"rrc_gNB_process_NGAP_INITIAL_CONTEXT_SETUP_REQ : gtpv1u_create_ngu_tunnel failed,start to release UE %x\n",ue_context_p->ue_context.rnti);
ue_context_p->ue_context.ue_release_timer_ng = 1;
ue_context_p->ue_context.ue_release_timer_thres_ng = 100;
ue_context_p->ue_context.ue_release_timer = 0;
ue_context_p->ue_context.ue_reestablishment_timer = 0;
ue_context_p->ue_context.ul_failure_timer = 20000;
ue_context_p->ue_context.ul_failure_timer = 0;
return (0);
}
nr_rrc_gNB_process_GTPV1U_CREATE_TUNNEL_RESP(
&ctxt,
&create_tunnel_resp,
&inde_list[0]);
ue_context_p->ue_context.setup_pdu_sessions += nb_pdusessions_tosetup;
ue_context_p->ue_context.established_pdu_sessions_flag = 1;
}
/* NAS PDU */
if (NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).nas_pdu_flag == 1) {
ue_context_p->ue_context.nas_pdu_flag = NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).nas_pdu_flag;
ue_context_p->ue_context.nas_pdu.length = NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).nas_pdu.length;
ue_context_p->ue_context.nas_pdu.buffer = NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).nas_pdu.buffer;
}
/* security */
rrc_gNB_process_security(&ctxt, ue_context_p, &(NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).security_capabilities));
process_gNB_security_key (
&ctxt,
ue_context_p,
NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).security_key);
/* configure only integrity, ciphering comes after receiving SecurityModeComplete */
nr_rrc_pdcp_config_security(&ctxt, ue_context_p, 0);
rrc_gNB_generate_SecurityModeCommand (&ctxt, ue_context_p);
// in case, send the S1SP initial context response if it is not sent with the attach complete message
if (ue_context_p->ue_context.StatusRrc == NR_RRC_RECONFIGURED) {
LOG_I(NR_RRC, "Sending rrc_gNB_send_NGAP_INITIAL_CONTEXT_SETUP_RESP, cause %ld\n", ue_context_p->ue_context.reestablishment_cause);
rrc_gNB_send_NGAP_INITIAL_CONTEXT_SETUP_RESP(&ctxt,ue_context_p);
}
return 0;
}
}
//------------------------------------------------------------------------------
void
rrc_gNB_send_NGAP_INITIAL_CONTEXT_SETUP_RESP(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *const ue_context_pP
)
//------------------------------------------------------------------------------
{
MessageDef *msg_p = NULL;
int pdusession;
int pdu_sessions_done = 0;
int pdu_sessions_failed = 0;
int qos_flow_index = 0;
msg_p = itti_alloc_new_message (TASK_RRC_ENB, 0, NGAP_INITIAL_CONTEXT_SETUP_RESP);
NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).gNB_ue_ngap_id = ue_context_pP->ue_context.gNB_ue_ngap_id;
for (pdusession = 0; pdusession < ue_context_pP->ue_context.nb_of_pdusessions; pdusession++) {
if (ue_context_pP->ue_context.pduSession[pdusession].status == PDU_SESSION_STATUS_DONE) {
pdu_sessions_done++;
NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions[pdusession].pdusession_id = ue_context_pP->ue_context.pduSession[pdusession].param.pdusession_id;
// TODO add other information from S1-U when it will be integrated
NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions[pdusession].gtp_teid = ue_context_pP->ue_context.gnb_gtp_teid[pdusession];
memcpy(NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions[pdusession].gNB_addr.buffer , ue_context_pP->ue_context.gnb_gtp_addrs[pdusession].buffer, 20);
NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions[pdusession].gNB_addr.length = 4;
ue_context_pP->ue_context.pduSession[pdusession].status = PDU_SESSION_STATUS_ESTABLISHED;
NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions[pdusession].nb_of_qos_flow = ue_context_pP->ue_context.pduSession[pdusession].param.nb_qos;
for (qos_flow_index = 0; qos_flow_index < ue_context_pP->ue_context.pduSession[pdusession].param.nb_qos; qos_flow_index++) {
NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions[pdusession].associated_qos_flows[qos_flow_index].qfi =
ue_context_pP->ue_context.pduSession[pdusession].param.qos[qos_flow_index].qfi;
NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions[pdusession].associated_qos_flows[qos_flow_index].qos_flow_mapping_ind = QOSFLOW_MAPPING_INDICATION_DL;
}
} else {
pdu_sessions_failed++;
ue_context_pP->ue_context.pduSession[pdusession].status = PDU_SESSION_STATUS_FAILED;
NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions_failed[pdusession].pdusession_id = ue_context_pP->ue_context.pduSession[pdusession].param.pdusession_id;
// TODO add cause when it will be integrated
NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions_failed[pdusession].cause = NGAP_Cause_PR_radioNetwork;
NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions_failed[pdusession].cause_value = NGAP_CauseRadioNetwork_unknown_PDU_session_ID;
}
}
NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).nb_of_pdusessions = pdu_sessions_done;
NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).nb_of_pdusessions_failed = pdu_sessions_failed;
itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, msg_p);
}
static NR_CipheringAlgorithm_t rrc_gNB_select_ciphering(
const protocol_ctxt_t *const ctxt_pP,
uint16_t algorithms)
{
gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
int i;
/* preset nea0 as fallback */
int ret = 0;
/* 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.
*/
for (i = 0; i < rrc->security.ciphering_algorithms_count; i++) {
int nea_mask[4] = {
0,
NGAP_ENCRYPTION_NEA1_MASK,
NGAP_ENCRYPTION_NEA2_MASK,
NGAP_ENCRYPTION_NEA3_MASK
};
if (rrc->security.ciphering_algorithms[i] == 0) {
/* nea0 */
break;
}
if (algorithms & nea_mask[rrc->security.ciphering_algorithms[i]]) {
ret = rrc->security.ciphering_algorithms[i];
break;
}
}
LOG_I(RRC, "selecting ciphering algorithm %d\n", ret);
return ret;
}
static e_NR_IntegrityProtAlgorithm rrc_gNB_select_integrity(
const protocol_ctxt_t *const ctxt_pP,
uint16_t algorithms)
{
gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
int i;
/* preset nia0 as fallback */
int ret = 0;
/* Select integrity 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.
*/
for (i = 0; i < rrc->security.integrity_algorithms_count; i++) {
int nia_mask[4] = {
0,
NGAP_INTEGRITY_NIA1_MASK,
NGAP_INTEGRITY_NIA2_MASK,
NGAP_INTEGRITY_NIA3_MASK
};
if (rrc->security.integrity_algorithms[i] == 0) {
/* nia0 */
break;
}
if (algorithms & nia_mask[rrc->security.integrity_algorithms[i]]) {
ret = rrc->security.integrity_algorithms[i];
break;
}
}
LOG_I(RRC, "selecting integrity algorithm %d\n", ret);
return ret;
}
int
rrc_gNB_process_security(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *const ue_context_pP,
ngap_security_capabilities_t *security_capabilities_pP
) {
bool changed = false;
NR_CipheringAlgorithm_t cipheringAlgorithm;
e_NR_IntegrityProtAlgorithm integrityProtAlgorithm;
/* Save security parameters */
ue_context_pP->ue_context.security_capabilities = *security_capabilities_pP;
// translation
LOG_D(NR_RRC,
"[gNB %d] NAS security_capabilities.encryption_algorithms %u AS ciphering_algorithm %lu NAS security_capabilities.integrity_algorithms %u AS integrity_algorithm %u\n",
ctxt_pP->module_id,
ue_context_pP->ue_context.security_capabilities.nRencryption_algorithms,
(unsigned long)ue_context_pP->ue_context.ciphering_algorithm,
ue_context_pP->ue_context.security_capabilities.nRintegrity_algorithms,
ue_context_pP->ue_context.integrity_algorithm);
/* Select relevant algorithms */
cipheringAlgorithm = rrc_gNB_select_ciphering(ctxt_pP, ue_context_pP->ue_context.security_capabilities.nRencryption_algorithms);
if (ue_context_pP->ue_context.ciphering_algorithm != cipheringAlgorithm) {
ue_context_pP->ue_context.ciphering_algorithm = cipheringAlgorithm;
changed = true;
}
integrityProtAlgorithm = rrc_gNB_select_integrity(ctxt_pP, ue_context_pP->ue_context.security_capabilities.nRintegrity_algorithms);
if (ue_context_pP->ue_context.integrity_algorithm != integrityProtAlgorithm) {
ue_context_pP->ue_context.integrity_algorithm = integrityProtAlgorithm;
changed = true;
}
LOG_I (NR_RRC, "[gNB %d][UE %x] Selected security algorithms (%p): %lx, %x, %s\n",
ctxt_pP->module_id,
ue_context_pP->ue_context.rnti,
security_capabilities_pP,
(unsigned long)cipheringAlgorithm,
integrityProtAlgorithm,
changed ? "changed" : "same");
return changed;
}
//------------------------------------------------------------------------------
int
rrc_gNB_process_NGAP_DOWNLINK_NAS(
MessageDef *msg_p,
const char *msg_name,
instance_t instance,
mui_t *rrc_gNB_mui
)
//------------------------------------------------------------------------------
{
uint16_t ue_initial_id;
uint32_t gNB_ue_ngap_id;
uint32_t length;
uint8_t *buffer;
struct rrc_gNB_ue_context_s *ue_context_p = NULL;
protocol_ctxt_t ctxt;
memset(&ctxt, 0, sizeof(protocol_ctxt_t));
ue_initial_id = NGAP_DOWNLINK_NAS (msg_p).ue_initial_id;
gNB_ue_ngap_id = NGAP_DOWNLINK_NAS (msg_p).gNB_ue_ngap_id;
ue_context_p = rrc_gNB_get_ue_context_from_ngap_ids(instance, ue_initial_id, gNB_ue_ngap_id);
LOG_I(NR_RRC, "[gNB %ld] Received %s: ue_initial_id %d, gNB_ue_ngap_id %u\n",
instance,
msg_name,
ue_initial_id,
gNB_ue_ngap_id);
if (ue_context_p == NULL) {
/* Can not associate this message to an UE index, send a failure to NGAP and discard it! */
MessageDef *msg_fail_p;
LOG_W(NR_RRC, "[gNB %ld] In NGAP_DOWNLINK_NAS: unknown UE from NGAP ids (%d, %u)\n", instance, ue_initial_id, gNB_ue_ngap_id);
msg_fail_p = itti_alloc_new_message (TASK_RRC_GNB, 0, NGAP_NAS_NON_DELIVERY_IND);
NGAP_NAS_NON_DELIVERY_IND (msg_fail_p).gNB_ue_ngap_id = gNB_ue_ngap_id;
NGAP_NAS_NON_DELIVERY_IND (msg_fail_p).nas_pdu.length = NGAP_DOWNLINK_NAS (msg_p).nas_pdu.length;
NGAP_NAS_NON_DELIVERY_IND (msg_fail_p).nas_pdu.buffer = NGAP_DOWNLINK_NAS (msg_p).nas_pdu.buffer;
// TODO add failure cause when defined!
itti_send_msg_to_task (TASK_NGAP, instance, msg_fail_p);
return (-1);
} else {
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, GNB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
/* Is it the first income from NGAP ? */
if (ue_context_p->ue_context.gNB_ue_ngap_id == 0) {
ue_context_p->ue_context.gNB_ue_ngap_id = NGAP_DOWNLINK_NAS (msg_p).gNB_ue_ngap_id;
}
/* Create message for PDCP (DLInformationTransfer_t) */
length = do_NR_DLInformationTransfer (
instance,
&buffer,
rrc_gNB_get_next_transaction_identifier (instance),
NGAP_DOWNLINK_NAS (msg_p).nas_pdu.length,
NGAP_DOWNLINK_NAS (msg_p).nas_pdu.buffer);
LOG_DUMPMSG(NR_RRC, DEBUG_RRC, buffer, length, "[MSG] RRC DL Information Transfer\n");
/*
* switch UL or DL NAS message without RRC piggybacked to SRB2 if active.
*/
switch (RC.nrrrc[ctxt.module_id]->node_type) {
case ngran_gNB_CU:
/* Transfer data to PDCP */
nr_rrc_data_req (
&ctxt,
ue_context_p->ue_context.Srb2.Active == 1 ? ue_context_p->ue_context.Srb2.Srb_info.Srb_id : ue_context_p->ue_context.Srb1.Srb_info.Srb_id,
(*rrc_gNB_mui)++,
SDU_CONFIRM_NO,
length,
buffer,
PDCP_TRANSMISSION_MODE_CONTROL);
break;
case ngran_gNB_DU:
// nothing to do for DU
AssertFatal(1==0,"nothing to do for DU\n");
break;
case ngran_gNB:
{
// rrc_mac_config_req_gNB
/* Transfer data to PDCP */
nr_rrc_data_req (
&ctxt,
ue_context_p->ue_context.Srb2.Active == 1 ? ue_context_p->ue_context.Srb2.Srb_info.Srb_id : ue_context_p->ue_context.Srb1.Srb_info.Srb_id,
(*rrc_gNB_mui)++,
SDU_CONFIRM_NO,
length,
buffer,
PDCP_TRANSMISSION_MODE_CONTROL);
}
break;
default :
LOG_W(NR_RRC, "Unknown node type %d\n", RC.nrrrc[ctxt.module_id]->node_type);
}
return (0);
}
}
//------------------------------------------------------------------------------
void
rrc_gNB_send_NGAP_UPLINK_NAS(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *const ue_context_pP,
NR_UL_DCCH_Message_t *const ul_dcch_msg
)
//------------------------------------------------------------------------------
{
uint32_t pdu_length;
uint8_t *pdu_buffer;
MessageDef *msg_p;
NR_ULInformationTransfer_t *ulInformationTransfer = ul_dcch_msg->message.choice.c1->choice.ulInformationTransfer;
if (ulInformationTransfer->criticalExtensions.present == NR_ULInformationTransfer__criticalExtensions_PR_ulInformationTransfer) {
pdu_length = ulInformationTransfer->criticalExtensions.choice.ulInformationTransfer->dedicatedNAS_Message->size;
pdu_buffer = ulInformationTransfer->criticalExtensions.choice.ulInformationTransfer->dedicatedNAS_Message->buf;
msg_p = itti_alloc_new_message (TASK_RRC_GNB, 0, NGAP_UPLINK_NAS);
NGAP_UPLINK_NAS (msg_p).gNB_ue_ngap_id = ue_context_pP->ue_context.gNB_ue_ngap_id;
NGAP_UPLINK_NAS (msg_p).nas_pdu.length = pdu_length;
NGAP_UPLINK_NAS (msg_p).nas_pdu.buffer = pdu_buffer;
// extract_imsi(NGAP_UPLINK_NAS (msg_p).nas_pdu.buffer,
// NGAP_UPLINK_NAS (msg_p).nas_pdu.length,
// ue_context_pP);
itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, msg_p);
LOG_I(NR_RRC,"Send RRC GNB UL Information Transfer \n");
}
}
//------------------------------------------------------------------------------
void
rrc_gNB_send_NGAP_PDUSESSION_SETUP_RESP(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *const ue_context_pP,
uint8_t xid
)
//------------------------------------------------------------------------------
{
MessageDef *msg_p;
int pdu_sessions_done = 0;
int pdu_sessions_failed = 0;
int pdusession;
int qos_flow_index;
msg_p = itti_alloc_new_message (TASK_RRC_GNB, 0, NGAP_PDUSESSION_SETUP_RESP);
NGAP_PDUSESSION_SETUP_RESP(msg_p).gNB_ue_ngap_id = ue_context_pP->ue_context.gNB_ue_ngap_id;
for (pdusession = 0; pdusession < ue_context_pP->ue_context.setup_pdu_sessions; pdusession++) {
// if (xid == ue_context_pP->ue_context.pdusession[pdusession].xid) {
if (ue_context_pP->ue_context.pduSession[pdusession].status == PDU_SESSION_STATUS_DONE) {
pdusession_setup_t * tmp=&NGAP_PDUSESSION_SETUP_RESP(msg_p).pdusessions[pdu_sessions_done];
tmp->pdusession_id = ue_context_pP->ue_context.pduSession[pdusession].param.pdusession_id;
// tmp->pdusession_id = 1;
tmp->nb_of_qos_flow = ue_context_pP->ue_context.pduSession[pdusession].param.nb_qos;
tmp->gtp_teid = ue_context_pP->ue_context.gnb_gtp_teid[pdusession];
tmp->gNB_addr.pdu_session_type = PDUSessionType_ipv4;
tmp->gNB_addr.length = ue_context_pP->ue_context.gnb_gtp_addrs[pdusession].length;
memcpy(tmp->gNB_addr.buffer,
ue_context_pP->ue_context.gnb_gtp_addrs[pdusession].buffer, tmp->gNB_addr.length);
for (qos_flow_index = 0; qos_flow_index < tmp->nb_of_qos_flow; qos_flow_index++) {
tmp->associated_qos_flows[qos_flow_index].qfi =
ue_context_pP->ue_context.pduSession[pdusession].param.qos[qos_flow_index].qfi;
tmp->associated_qos_flows[qos_flow_index].qos_flow_mapping_ind = QOSFLOW_MAPPING_INDICATION_DL;
}
ue_context_pP->ue_context.pduSession[pdusession].status = PDU_SESSION_STATUS_ESTABLISHED;
LOG_I (NR_RRC,"gnb_gtp_addr (msg index %d, pdu_sessions index %d, status %d, xid %d): nb_of_pdusessions %d, pdusession_id %d, teid: %u \n ",
pdu_sessions_done, pdusession, ue_context_pP->ue_context.pduSession[pdusession].status, xid,
ue_context_pP->ue_context.nb_of_pdusessions,
NGAP_PDUSESSION_SETUP_RESP (msg_p).pdusessions[pdu_sessions_done].pdusession_id,
NGAP_PDUSESSION_SETUP_RESP (msg_p).pdusessions[pdu_sessions_done].gtp_teid);
pdu_sessions_done++;
} else if ((ue_context_pP->ue_context.pduSession[pdusession].status == PDU_SESSION_STATUS_NEW) ||
(ue_context_pP->ue_context.pduSession[pdusession].status == PDU_SESSION_STATUS_ESTABLISHED)) {
LOG_D (NR_RRC,"PDU-SESSION is NEW or already ESTABLISHED\n");
} else { /* to be improved */
ue_context_pP->ue_context.pduSession[pdusession].status = PDU_SESSION_STATUS_FAILED;
NGAP_PDUSESSION_SETUP_RESP (msg_p).pdusessions_failed[pdu_sessions_failed].pdusession_id = ue_context_pP->ue_context.pduSession[pdusession].param.pdusession_id;
pdu_sessions_failed++;
// TODO add cause when it will be integrated
}
NGAP_PDUSESSION_SETUP_RESP(msg_p).nb_of_pdusessions = pdu_sessions_done;
NGAP_PDUSESSION_SETUP_RESP(msg_p).nb_of_pdusessions_failed = pdu_sessions_failed;
// } else {
// LOG_D(NR_RRC,"xid does not corresponds (context pdu_sessions index %d, status %d, xid %d/%d) \n ",
// pdusession, ue_context_pP->ue_context.pdusession[pdusession].status, xid, ue_context_pP->ue_context.pdusession[pdusession].xid);
// }
}
if ((pdu_sessions_done > 0) ) {
LOG_I(NR_RRC,"NGAP_PDUSESSION_SETUP_RESP: sending the message: nb_of_pdusessions %d, total pdu_sessions %d, index %d\n",
ue_context_pP->ue_context.nb_of_pdusessions, ue_context_pP->ue_context.setup_pdu_sessions, pdusession);
itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, msg_p);
}
for(int i = 0; i < NB_RB_MAX; i++) {
ue_context_pP->ue_context.pduSession[i].xid = -1;
}
return;
}
//------------------------------------------------------------------------------
int
rrc_gNB_process_NGAP_PDUSESSION_SETUP_REQ(
MessageDef *msg_p,
const char *msg_name,
instance_t instance
)
//------------------------------------------------------------------------------
{
uint16_t ue_initial_id;
uint32_t gNB_ue_ngap_id;
rrc_gNB_ue_context_t *ue_context_p = NULL;
protocol_ctxt_t ctxt={0};
gtpv1u_gnb_create_tunnel_req_t create_tunnel_req={0};
gtpv1u_gnb_create_tunnel_resp_t create_tunnel_resp={0};
uint8_t pdu_sessions_done;
uint8_t inde_list[NR_NB_RB_MAX - 3]= {0};
int ret = 0;
ue_initial_id = NGAP_PDUSESSION_SETUP_REQ(msg_p).ue_initial_id;
gNB_ue_ngap_id = NGAP_PDUSESSION_SETUP_REQ(msg_p).gNB_ue_ngap_id;
ue_context_p = rrc_gNB_get_ue_context_from_ngap_ids(instance, ue_initial_id, gNB_ue_ngap_id);
LOG_I(NR_RRC, "[gNB %ld] Received %s: ue_initial_id %d, gNB_ue_ngap_id %u \n",
instance, msg_name, ue_initial_id, gNB_ue_ngap_id);
if (ue_context_p == NULL) {
MessageDef *msg_fail_p = NULL;
LOG_W(NR_RRC, "[gNB %ld] In NGAP_PDUSESSION_SETUP_REQ: unknown UE from NGAP ids (%d, %u)\n", instance, ue_initial_id, gNB_ue_ngap_id);
msg_fail_p = itti_alloc_new_message(TASK_RRC_GNB, 0, NGAP_PDUSESSION_SETUP_REQUEST_FAIL);
NGAP_PDUSESSION_SETUP_REQ(msg_fail_p).gNB_ue_ngap_id = gNB_ue_ngap_id;
// TODO add failure cause when defined!
itti_send_msg_to_task (TASK_NGAP, instance, msg_fail_p);
return (-1);
} else {
memset(&create_tunnel_req, 0, sizeof(gtpv1u_gnb_create_tunnel_req_t));
uint8_t nb_pdusessions_tosetup = NGAP_PDUSESSION_SETUP_REQ(msg_p).nb_pdusessions_tosetup;
pdu_sessions_done = 0;
PROTOCOL_CTXT_SET_BY_MODULE_ID(&ctxt, 0, GNB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0, 0);
for (int i = 0; i < NR_NB_RB_MAX - 3; i++) {
if(ue_context_p->ue_context.pduSession[i].status >= PDU_SESSION_STATUS_DONE)
continue;
ue_context_p->ue_context.pduSession[i].status = PDU_SESSION_STATUS_NEW;
ue_context_p->ue_context.pduSession[i].param = NGAP_PDUSESSION_SETUP_REQ(msg_p).pdusession_setup_params[pdu_sessions_done];
create_tunnel_req.pdusession_id[pdu_sessions_done] = NGAP_PDUSESSION_SETUP_REQ(msg_p).pdusession_setup_params[pdu_sessions_done].pdusession_id;
create_tunnel_req.incoming_rb_id[pdu_sessions_done]= i+1;
create_tunnel_req.outgoing_teid[pdu_sessions_done] = NGAP_PDUSESSION_SETUP_REQ(msg_p).pdusession_setup_params[pdu_sessions_done].gtp_teid;
create_tunnel_req.outgoing_qfi[pdu_sessions_done] = NGAP_PDUSESSION_SETUP_REQ(msg_p).pdusession_setup_params[pdu_sessions_done].qos[0].qfi;
memcpy(create_tunnel_req.dst_addr[pdu_sessions_done].buffer,
NGAP_PDUSESSION_SETUP_REQ(msg_p).pdusession_setup_params[pdu_sessions_done].upf_addr.buffer,
sizeof(uint8_t)*20);
create_tunnel_req.dst_addr[pdu_sessions_done].length = NGAP_PDUSESSION_SETUP_REQ(msg_p).pdusession_setup_params[pdu_sessions_done].upf_addr.length;
LOG_I(NR_RRC,"NGAP PDUSESSION SETUP REQ: local index %d teid %u, pdusession id %d \n",
i,
create_tunnel_req.outgoing_teid[pdu_sessions_done],
create_tunnel_req.pdusession_id[pdu_sessions_done]);
inde_list[pdu_sessions_done] = i;
pdu_sessions_done++;
if(pdu_sessions_done >= nb_pdusessions_tosetup) {
break;
}
}
ue_context_p->ue_context.nb_of_pdusessions = NGAP_PDUSESSION_SETUP_REQ(msg_p).nb_pdusessions_tosetup;
ue_context_p->ue_context.gNB_ue_ngap_id = NGAP_PDUSESSION_SETUP_REQ(msg_p).gNB_ue_ngap_id;
ue_context_p->ue_context.amf_ue_ngap_id = NGAP_PDUSESSION_SETUP_REQ(msg_p).amf_ue_ngap_id;
create_tunnel_req.ue_id = ue_context_p->ue_context.rnti;
create_tunnel_req.num_tunnels = pdu_sessions_done;
ret = gtpv1u_create_ngu_tunnel(
instance,
&create_tunnel_req,
&create_tunnel_resp);
if (ret != 0) {
LOG_E(NR_RRC,"rrc_gNB_process_NGAP_PDUSESSION_SETUP_REQ : gtpv1u_create_ngu_tunnel failed,start to release UE %x\n",ue_context_p->ue_context.rnti);
ue_context_p->ue_context.ue_release_timer_ng = 1;
ue_context_p->ue_context.ue_release_timer_thres_ng = 100;
ue_context_p->ue_context.ue_release_timer = 0;
ue_context_p->ue_context.ue_reestablishment_timer = 0;
ue_context_p->ue_context.ul_failure_timer = 20000; // set ul_failure to 20000 for triggering rrc_eNB_send_S1AP_UE_CONTEXT_RELEASE_REQ
// rrc_gNB_free_UE(ctxt.module_id,ue_context_p);
ue_context_p->ue_context.ul_failure_timer = 0;
return (0);
}
nr_rrc_gNB_process_GTPV1U_CREATE_TUNNEL_RESP(
&ctxt,
&create_tunnel_resp,
&inde_list[0]);
ue_context_p->ue_context.setup_pdu_sessions += nb_pdusessions_tosetup;
// TEST
// ue_context_p->ue_context.pdusession[0].status = PDU_SESSION_STATUS_DONE;
// rrc_gNB_send_NGAP_PDUSESSION_SETUP_RESP(&ctxt, ue_context_p, 0);
if(!NODE_IS_CU(RC.nrrrc[ctxt.module_id]->node_type)){
rrc_gNB_generate_dedicatedRRCReconfiguration(&ctxt, ue_context_p, NULL);
}
else{
/*Generate a UE context modification request message towards the DU to instruct the DU
*for SRB2 and DRB configuration and get the updates on master cell group config from the DU*/
MessageDef *message_p;
message_p = itti_alloc_new_message (TASK_RRC_GNB, 0, F1AP_UE_CONTEXT_MODIFICATION_REQ);
f1ap_ue_context_setup_t *req=&F1AP_UE_CONTEXT_MODIFICATION_REQ (message_p);
req->rnti = ue_context_p->ue_context.rnti;
req->mcc = RC.nrrrc[ctxt.module_id]->configuration.mcc[0];
req->mnc = RC.nrrrc[ctxt.module_id]->configuration.mnc[0];
req->mnc_digit_length = RC.nrrrc[ctxt.module_id]->configuration.mnc_digit_length[0];
req->nr_cellid = RC.nrrrc[ctxt.module_id]->nr_cellid;
/*Instruction towards the DU for SRB2 configuration*/
req->srbs_to_be_setup = malloc(1*sizeof(f1ap_srb_to_be_setup_t));
req->srbs_to_be_setup_length = 1;
f1ap_srb_to_be_setup_t *SRBs=req->srbs_to_be_setup;
SRBs[0].srb_id = 2;
SRBs[0].lcid = 2;
/*Instruction towards the DU for DRB configuration and tunnel creation*/
gtpv1u_gnb_create_tunnel_req_t create_tunnel_req;
memset(&create_tunnel_req, 0, sizeof(gtpv1u_gnb_create_tunnel_req_t));
req->drbs_to_be_setup = malloc(1*sizeof(f1ap_drb_to_be_setup_t));
req->drbs_to_be_setup_length = 1;
f1ap_drb_to_be_setup_t *DRBs=req->drbs_to_be_setup;
LOG_D(RRC, "Length of DRB list:%d \n", req->drbs_to_be_setup_length);
DRBs[0].drb_id = 1;
DRBs[0].rlc_mode = RLC_MODE_AM;
DRBs[0].up_ul_tnl[0].tl_address = inet_addr(RC.nrrrc[ctxt.module_id]->eth_params_s.my_addr);
DRBs[0].up_ul_tnl[0].port=RC.nrrrc[ctxt.module_id]->eth_params_s.my_portd;
DRBs[0].up_ul_tnl_length = 1;
DRBs[0].up_dl_tnl[0].tl_address = inet_addr(RC.nrrrc[ctxt.module_id]->eth_params_s.remote_addr);
DRBs[0].up_dl_tnl[0].port=RC.nrrrc[ctxt.module_id]->eth_params_s.remote_portd;
DRBs[0].up_dl_tnl_length = 1;
itti_send_msg_to_task (TASK_CU_F1, ctxt.module_id, message_p);
}
return(0);
}
}
//------------------------------------------------------------------------------
int
rrc_gNB_process_NGAP_PDUSESSION_MODIFY_REQ(
MessageDef *msg_p,
const char *msg_name,
instance_t instance
)
//------------------------------------------------------------------------------
{
uint16_t ue_initial_id;
uint32_t gNB_ue_ngap_id;
uint8_t nb_pdusessions_tomodify;
rrc_gNB_ue_context_t *ue_context_p = NULL;
uint8_t i;
uint8_t qos_flow_index;
protocol_ctxt_t ctxt;
ue_initial_id = NGAP_PDUSESSION_MODIFY_REQ(msg_p).ue_initial_id;
gNB_ue_ngap_id = NGAP_PDUSESSION_MODIFY_REQ(msg_p).gNB_ue_ngap_id;
nb_pdusessions_tomodify = NGAP_PDUSESSION_MODIFY_REQ(msg_p).nb_pdusessions_tomodify;
ue_context_p = rrc_gNB_get_ue_context_from_ngap_ids(instance, ue_initial_id, gNB_ue_ngap_id);
if (ue_context_p == NULL) {
LOG_W(NR_RRC, "[gNB %ld] In NGAP_PDUSESSION_MODIFY_REQ: unknown UE from NGAP ids (%d, %u)\n", instance, ue_initial_id, gNB_ue_ngap_id);
// TODO
return (-1);
} else {
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, GNB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
ctxt.eNB_index = 0;
ue_context_p->ue_context.gNB_ue_ngap_id = gNB_ue_ngap_id;
{
int j;
bool is_treated[NGAP_MAX_PDUSESSION] = {false};
uint8_t nb_of_failed_pdusessions = 0;
for (i = 0; i < nb_pdusessions_tomodify; i++) {
if (is_treated[i] == true) {
continue;
}
//Check if same PDU session ID to handle multiple pdu sessions
for (j = i+1; j < nb_pdusessions_tomodify; j++) {
if (is_treated[j] == false &&
NGAP_PDUSESSION_MODIFY_REQ(msg_p).pdusession_modify_params[j].pdusession_id ==
NGAP_PDUSESSION_MODIFY_REQ(msg_p).pdusession_modify_params[i].pdusession_id) {
// handle multiple pdu session id
LOG_D(NR_RRC, "handle multiple pdu session id \n");
ue_context_p->ue_context.modify_pdusession[j].status = PDU_SESSION_STATUS_NEW;
ue_context_p->ue_context.modify_pdusession[j].param.pdusession_id =
NGAP_PDUSESSION_MODIFY_REQ(msg_p).pdusession_modify_params[j].pdusession_id;
ue_context_p->ue_context.modify_pdusession[j].cause = NGAP_CAUSE_RADIO_NETWORK;
ue_context_p->ue_context.modify_pdusession[j].cause_value = NGAP_CauseRadioNetwork_multiple_PDU_session_ID_instances;
nb_of_failed_pdusessions++;
is_treated[i] = true;
is_treated[j] = true;
}
}
// handle multiple pdu session id case
if (is_treated[i] == true) {
LOG_D(NR_RRC, "handle multiple pdu session id \n");
ue_context_p->ue_context.modify_pdusession[i].status = PDU_SESSION_STATUS_NEW;
ue_context_p->ue_context.modify_pdusession[i].param.pdusession_id =
NGAP_PDUSESSION_MODIFY_REQ(msg_p).pdusession_modify_params[i].pdusession_id;
ue_context_p->ue_context.modify_pdusession[i].cause = NGAP_CAUSE_RADIO_NETWORK;
ue_context_p->ue_context.modify_pdusession[i].cause_value = NGAP_CauseRadioNetwork_multiple_PDU_session_ID_instances;
nb_of_failed_pdusessions++;
continue;
}
// Check pdu session ID is established
for (j = 0; j < NR_NB_RB_MAX -3; j++) {
if (ue_context_p->ue_context.pduSession[j].param.pdusession_id ==
NGAP_PDUSESSION_MODIFY_REQ(msg_p).pdusession_modify_params[i].pdusession_id) {
if (ue_context_p->ue_context.pduSession[j].status == PDU_SESSION_STATUS_TORELEASE ||
ue_context_p->ue_context.pduSession[j].status == PDU_SESSION_STATUS_DONE) {
break;
}
// Found established pdu session, prepare to send RRC message
ue_context_p->ue_context.modify_pdusession[i].status = PDU_SESSION_STATUS_NEW;
ue_context_p->ue_context.modify_pdusession[i].param.pdusession_id =
NGAP_PDUSESSION_MODIFY_REQ(msg_p).pdusession_modify_params[i].pdusession_id;
ue_context_p->ue_context.modify_pdusession[i].cause = NGAP_CAUSE_NOTHING;
if (NGAP_PDUSESSION_MODIFY_REQ(msg_p).pdusession_modify_params[i].nas_pdu.buffer != NULL) {
ue_context_p->ue_context.modify_pdusession[i].param.nas_pdu.buffer =
NGAP_PDUSESSION_MODIFY_REQ(msg_p).pdusession_modify_params[i].nas_pdu.buffer;
ue_context_p->ue_context.modify_pdusession[i].param.nas_pdu.length =
NGAP_PDUSESSION_MODIFY_REQ(msg_p).pdusession_modify_params[i].nas_pdu.length;
}
// Save new pdu session parameters, qos, upf addr, teid
for (qos_flow_index = 0; qos_flow_index < NGAP_PDUSESSION_MODIFY_REQ(msg_p).pdusession_modify_params[i].nb_qos; qos_flow_index++) {
ue_context_p->ue_context.modify_pdusession[i].param.qos[qos_flow_index] =
NGAP_PDUSESSION_MODIFY_REQ(msg_p).pdusession_modify_params[i].qos[qos_flow_index];
}
ue_context_p->ue_context.modify_pdusession[i].param.nb_qos =
NGAP_PDUSESSION_MODIFY_REQ(msg_p).pdusession_modify_params[i].nb_qos;
ue_context_p->ue_context.modify_pdusession[i].param.upf_addr =
ue_context_p->ue_context.pduSession[j].param.upf_addr;
ue_context_p->ue_context.modify_pdusession[i].param.gtp_teid =
ue_context_p->ue_context.pduSession[j].param.gtp_teid;
is_treated[i] = true;
break;
}
}
// handle Unknown pdu session ID
if (is_treated[i] == false) {
LOG_D(NR_RRC, "handle Unknown pdu session ID \n");
ue_context_p->ue_context.modify_pdusession[i].status = PDU_SESSION_STATUS_NEW;
ue_context_p->ue_context.modify_pdusession[i].param.pdusession_id =
NGAP_PDUSESSION_MODIFY_REQ(msg_p).pdusession_modify_params[i].pdusession_id;
ue_context_p->ue_context.modify_pdusession[i].cause = NGAP_CAUSE_RADIO_NETWORK;
ue_context_p->ue_context.modify_pdusession[i].cause_value = NGAP_CauseRadioNetwork_unknown_PDU_session_ID;
nb_of_failed_pdusessions++;
is_treated[i] = true;
}
}
ue_context_p->ue_context.nb_of_modify_pdusessions = nb_pdusessions_tomodify;
ue_context_p->ue_context.nb_of_failed_pdusessions = nb_of_failed_pdusessions;
}
if (ue_context_p->ue_context.nb_of_failed_pdusessions < ue_context_p->ue_context.nb_of_modify_pdusessions) {
LOG_D(NR_RRC, "generate RRCReconfiguration \n");
rrc_gNB_modify_dedicatedRRCReconfiguration(&ctxt, ue_context_p);
} else { // all pdu modification failed
LOG_I(NR_RRC, "pdu session modify failed, fill NGAP_PDUSESSION_MODIFY_RESP with the pdu session information that failed to modify \n");
uint8_t nb_of_pdu_sessions_failed = 0;
MessageDef *msg_fail_p = NULL;
msg_fail_p = itti_alloc_new_message (TASK_RRC_GNB, 0, NGAP_PDUSESSION_MODIFY_RESP);
if (msg_fail_p == NULL) {
LOG_E(NR_RRC, "itti_alloc_new_message failed, msg_fail_p is NULL \n");
return (-1);
}
NGAP_PDUSESSION_MODIFY_RESP(msg_fail_p).gNB_ue_ngap_id = gNB_ue_ngap_id;
NGAP_PDUSESSION_MODIFY_RESP(msg_fail_p).nb_of_pdusessions = 0;
for (nb_of_pdu_sessions_failed = 0; nb_of_pdu_sessions_failed < ue_context_p->ue_context.nb_of_failed_pdusessions; nb_of_pdu_sessions_failed++) {
NGAP_PDUSESSION_MODIFY_RESP(msg_fail_p).pdusessions_failed[nb_of_pdu_sessions_failed].pdusession_id =
ue_context_p->ue_context.modify_pdusession[nb_of_pdu_sessions_failed].param.pdusession_id;
NGAP_PDUSESSION_MODIFY_RESP(msg_fail_p).pdusessions_failed[nb_of_pdu_sessions_failed].cause =
ue_context_p->ue_context.modify_pdusession[nb_of_pdu_sessions_failed].cause;
NGAP_PDUSESSION_MODIFY_RESP(msg_fail_p).pdusessions_failed[nb_of_pdu_sessions_failed].cause_value =
ue_context_p->ue_context.modify_pdusession[nb_of_pdu_sessions_failed].cause_value;
}
NGAP_PDUSESSION_MODIFY_RESP(msg_fail_p).nb_of_pdusessions_failed =
ue_context_p->ue_context.nb_of_failed_pdusessions;
itti_send_msg_to_task(TASK_NGAP, instance, msg_fail_p);
ue_context_p->ue_context.nb_of_modify_pdusessions = 0;
ue_context_p->ue_context.nb_of_failed_pdusessions = 0;
memset(ue_context_p->ue_context.modify_pdusession, 0, sizeof(ue_context_p->ue_context.modify_pdusession));
return (0);
}
}
return 0;
}
//------------------------------------------------------------------------------
int
rrc_gNB_send_NGAP_PDUSESSION_MODIFY_RESP(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *const ue_context_pP,
uint8_t xid
)
//------------------------------------------------------------------------------
{
MessageDef *msg_p = NULL;
int i, j;
uint8_t qos_flow_index;
uint8_t pdu_sessions_failed = 0;
uint8_t pdu_sessions_done = 0;
msg_p = itti_alloc_new_message (TASK_RRC_GNB, 0, NGAP_PDUSESSION_MODIFY_RESP);
if (msg_p == NULL) {
LOG_E(NR_RRC, "itti_alloc_new_message failed, msg_p is NULL \n");
return (-1);
}
LOG_I(NR_RRC, "send message NGAP_PDUSESSION_MODIFY_RESP \n");
NGAP_PDUSESSION_MODIFY_RESP(msg_p).gNB_ue_ngap_id = ue_context_pP->ue_context.gNB_ue_ngap_id;
for (i = 0; i < ue_context_pP->ue_context.nb_of_modify_pdusessions; i++) {
if (xid == ue_context_pP->ue_context.modify_pdusession[i].xid) {
if (ue_context_pP->ue_context.modify_pdusession[i].status == PDU_SESSION_STATUS_DONE) {
for (j = 0; j < ue_context_pP->ue_context.setup_pdu_sessions; j++) {
if (ue_context_pP->ue_context.modify_pdusession[i].param.pdusession_id ==
ue_context_pP->ue_context.pduSession[j].param.pdusession_id) {
LOG_I(NR_RRC, "update pdu session %d \n", ue_context_pP->ue_context.pduSession[j].param.pdusession_id);
// Update ue_context_pP->ue_context.pduSession
ue_context_pP->ue_context.pduSession[j].status = PDU_SESSION_STATUS_ESTABLISHED;
ue_context_pP->ue_context.pduSession[j].cause = NGAP_CAUSE_NOTHING;
for (qos_flow_index = 0; qos_flow_index < ue_context_pP->ue_context.modify_pdusession[i].param.nb_qos; qos_flow_index++) {
ue_context_pP->ue_context.pduSession[j].param.qos[qos_flow_index] =
ue_context_pP->ue_context.modify_pdusession[i].param.qos[qos_flow_index];
}
break;
}
}
if (j < ue_context_pP->ue_context.setup_pdu_sessions) {
NGAP_PDUSESSION_MODIFY_RESP(msg_p).pdusessions[pdu_sessions_done].pdusession_id =
ue_context_pP->ue_context.modify_pdusession[i].param.pdusession_id;
for (qos_flow_index = 0; qos_flow_index < ue_context_pP->ue_context.modify_pdusession[i].param.nb_qos; qos_flow_index++) {
NGAP_PDUSESSION_MODIFY_RESP(msg_p).pdusessions[pdu_sessions_done].qos[qos_flow_index].qfi =
ue_context_pP->ue_context.modify_pdusession[i].param.qos[qos_flow_index].qfi;
}
NGAP_PDUSESSION_MODIFY_RESP(msg_p).pdusessions[pdu_sessions_done].nb_of_qos_flow =
ue_context_pP->ue_context.modify_pdusession[i].param.nb_qos;
LOG_I(NR_RRC, "Modify Resp (msg index %d, pdu session index %d, status %d, xid %d): nb_of_modify_pdusessions %d, pdusession_id %d \n ",
pdu_sessions_done, i, ue_context_pP->ue_context.modify_pdusession[i].status, xid,
ue_context_pP->ue_context.nb_of_modify_pdusessions,
NGAP_PDUSESSION_MODIFY_RESP(msg_p).pdusessions[pdu_sessions_done].pdusession_id);
pdu_sessions_done++;
} else {
NGAP_PDUSESSION_MODIFY_RESP(msg_p).pdusessions_failed[pdu_sessions_failed].pdusession_id =
ue_context_pP->ue_context.modify_pdusession[i].param.pdusession_id;
NGAP_PDUSESSION_MODIFY_RESP(msg_p).pdusessions_failed[pdu_sessions_failed].cause = NGAP_CAUSE_RADIO_NETWORK;
NGAP_PDUSESSION_MODIFY_RESP(msg_p).pdusessions_failed[pdu_sessions_failed].cause_value = NGAP_CauseRadioNetwork_unknown_PDU_session_ID;
pdu_sessions_failed++;
}
} else if ((ue_context_pP->ue_context.modify_pdusession[i].status == PDU_SESSION_STATUS_NEW) ||
(ue_context_pP->ue_context.modify_pdusession[i].status == PDU_SESSION_STATUS_ESTABLISHED)) {
LOG_D (NR_RRC, "PDU SESSION is NEW or already ESTABLISHED\n");
} else if (ue_context_pP->ue_context.modify_pdusession[i].status == PDU_SESSION_STATUS_FAILED) {
NGAP_PDUSESSION_MODIFY_RESP(msg_p).pdusessions_failed[pdu_sessions_failed].pdusession_id =
ue_context_pP->ue_context.modify_pdusession[i].param.pdusession_id;
NGAP_PDUSESSION_MODIFY_RESP(msg_p).pdusessions_failed[pdu_sessions_failed].cause =
ue_context_pP->ue_context.modify_pdusession[i].cause;
NGAP_PDUSESSION_MODIFY_RESP(msg_p).pdusessions_failed[pdu_sessions_failed].cause_value =
ue_context_pP->ue_context.modify_pdusession[i].cause_value;
pdu_sessions_failed++;
}
} else {
LOG_D(NR_RRC,"xid does not correspond (context pdu session index %d, status %d, xid %d/%d) \n ",
i, ue_context_pP->ue_context.modify_pdusession[i].status, xid, ue_context_pP->ue_context.modify_pdusession[i].xid);
}
}
NGAP_PDUSESSION_MODIFY_RESP(msg_p).nb_of_pdusessions = pdu_sessions_done;
NGAP_PDUSESSION_MODIFY_RESP(msg_p).nb_of_pdusessions_failed = pdu_sessions_failed;
if (pdu_sessions_done > 0 || pdu_sessions_failed > 0) {
LOG_D(NR_RRC,"NGAP_PDUSESSION_MODIFY_RESP: sending the message: nb_of_pdusessions %d, total pdu session %d, index %d\n",
ue_context_pP->ue_context.nb_of_modify_pdusessions, ue_context_pP->ue_context.setup_pdu_sessions, i);
itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, msg_p);
} else {
itti_free (ITTI_MSG_ORIGIN_ID(msg_p), msg_p);
}
return 0;
}
//------------------------------------------------------------------------------
void
rrc_gNB_send_NGAP_UE_CONTEXT_RELEASE_REQ(
const module_id_t gnb_mod_idP,
const rrc_gNB_ue_context_t *const ue_context_pP,
const ngap_Cause_t causeP,
const long cause_valueP)
//------------------------------------------------------------------------------
{
if (ue_context_pP == NULL) {
LOG_E(RRC, "[gNB] In NGAP_UE_CONTEXT_RELEASE_REQ: invalid UE\n");
} else {
MessageDef *msg_context_release_req_p = NULL;
msg_context_release_req_p = itti_alloc_new_message(TASK_RRC_GNB, 0, NGAP_UE_CONTEXT_RELEASE_REQ);
NGAP_UE_CONTEXT_RELEASE_REQ(msg_context_release_req_p).gNB_ue_ngap_id = ue_context_pP->ue_context.gNB_ue_ngap_id;
NGAP_UE_CONTEXT_RELEASE_REQ(msg_context_release_req_p).cause = causeP;
NGAP_UE_CONTEXT_RELEASE_REQ(msg_context_release_req_p).cause_value = cause_valueP;
NGAP_UE_CONTEXT_RELEASE_REQ(msg_context_release_req_p).nb_of_pdusessions = ue_context_pP->ue_context.setup_pdu_sessions;
for (int pdusession = 0; pdusession < ue_context_pP->ue_context.setup_pdu_sessions; pdusession++) {
NGAP_UE_CONTEXT_RELEASE_REQ(msg_context_release_req_p).pdusessions[pdusession].pdusession_id = ue_context_pP->ue_context.pduSession[pdusession].param.pdusession_id;
}
itti_send_msg_to_task(TASK_NGAP, GNB_MODULE_ID_TO_INSTANCE(gnb_mod_idP), msg_context_release_req_p);
}
}
/*------------------------------------------------------------------------------*/
int
rrc_gNB_process_NGAP_UE_CONTEXT_RELEASE_REQ (
MessageDef *msg_p,
const char *msg_name,
instance_t instance)
{
uint32_t gNB_ue_ngap_id;
struct rrc_gNB_ue_context_s *ue_context_p = NULL;
gNB_ue_ngap_id = NGAP_UE_CONTEXT_RELEASE_REQ(msg_p).gNB_ue_ngap_id;
ue_context_p = rrc_gNB_get_ue_context_from_ngap_ids(instance, UE_INITIAL_ID_INVALID, gNB_ue_ngap_id);
if (ue_context_p == NULL) {
/* Can not associate this message to an UE index, send a failure to ngAP and discard it! */
MessageDef *msg_fail_p;
LOG_W(RRC, "[gNB %ld] In NGAP_UE_CONTEXT_RELEASE_REQ: unknown UE from gNB_ue_ngap_id (%u)\n",
instance,
gNB_ue_ngap_id);
msg_fail_p = itti_alloc_new_message(TASK_RRC_GNB, 0, NGAP_UE_CONTEXT_RELEASE_RESP); /* TODO change message ID. */
NGAP_UE_CONTEXT_RELEASE_RESP(msg_fail_p).gNB_ue_ngap_id = gNB_ue_ngap_id;
// TODO add failure cause when defined!
itti_send_msg_to_task(TASK_NGAP, instance, msg_fail_p);
return (-1);
} else {
/* TODO release context. */
/* Send the response */
{
MessageDef *msg_resp_p;
msg_resp_p = itti_alloc_new_message(TASK_RRC_GNB, 0, NGAP_UE_CONTEXT_RELEASE_RESP);
NGAP_UE_CONTEXT_RELEASE_RESP(msg_resp_p).gNB_ue_ngap_id = gNB_ue_ngap_id;
itti_send_msg_to_task(TASK_NGAP, instance, msg_resp_p);
}
return (0);
}
}
//-----------------------------------------------------------------------------
/*
* Process the NG command NGAP_UE_CONTEXT_RELEASE_COMMAND, sent by AMF.
* The gNB should remove all pdu session, NG context, and other context of the UE.
*/
int
rrc_gNB_process_NGAP_UE_CONTEXT_RELEASE_COMMAND(
MessageDef *msg_p,
const char *msg_name,
instance_t instance) {
//-----------------------------------------------------------------------------
uint32_t gNB_ue_ngap_id = 0;
protocol_ctxt_t ctxt;
struct rrc_gNB_ue_context_s *ue_context_p = NULL;
struct rrc_ue_ngap_ids_s *rrc_ue_ngap_ids = NULL;
gNB_ue_ngap_id = NGAP_UE_CONTEXT_RELEASE_COMMAND(msg_p).gNB_ue_ngap_id;
ue_context_p = rrc_gNB_get_ue_context_from_ngap_ids(instance, UE_INITIAL_ID_INVALID, gNB_ue_ngap_id);
if (ue_context_p == NULL) {
/* Can not associate this message to an UE index */
MessageDef *msg_complete_p = NULL;
LOG_W(NR_RRC, "[gNB %ld] In NGAP_UE_CONTEXT_RELEASE_COMMAND: unknown UE from gNB_ue_ngap_id (%u)\n",
instance,
gNB_ue_ngap_id);
msg_complete_p = itti_alloc_new_message(TASK_RRC_GNB, 0, NGAP_UE_CONTEXT_RELEASE_COMPLETE);
NGAP_UE_CONTEXT_RELEASE_COMPLETE(msg_complete_p).gNB_ue_ngap_id = gNB_ue_ngap_id;
itti_send_msg_to_task(TASK_NGAP, instance, msg_complete_p);
rrc_ue_ngap_ids = rrc_gNB_NGAP_get_ue_ids(RC.nrrrc[instance], UE_INITIAL_ID_INVALID, gNB_ue_ngap_id);
if (rrc_ue_ngap_ids != NULL) {
rrc_gNB_NGAP_remove_ue_ids(RC.nrrrc[instance], rrc_ue_ngap_ids);
}
return -1;
} else {
ue_context_p->ue_context.ue_release_timer_ng = 0;
ue_context_p->ue_context.ue_release_timer_thres_rrc = 1000;
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, GNB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
ctxt.eNB_index = 0;
rrc_gNB_generate_RRCRelease(&ctxt, ue_context_p);
return 0;
}
}
void rrc_gNB_send_NGAP_UE_CONTEXT_RELEASE_COMPLETE(
instance_t instance,
uint32_t gNB_ue_ngap_id) {
MessageDef *msg = itti_alloc_new_message(TASK_RRC_GNB, 0, NGAP_UE_CONTEXT_RELEASE_COMPLETE);
NGAP_UE_CONTEXT_RELEASE_COMPLETE(msg).gNB_ue_ngap_id = gNB_ue_ngap_id;
itti_send_msg_to_task(TASK_NGAP, instance, msg);
}
//------------------------------------------------------------------------------
/*
* Remove UE ids (ue_initial_id and ng_id) from hashtables.
*/
void
rrc_gNB_NGAP_remove_ue_ids(
gNB_RRC_INST *const rrc_instance_pP,
struct rrc_ue_ngap_ids_s *const ue_ids_pP
)
//------------------------------------------------------------------------------
{
hashtable_rc_t h_rc;
if (rrc_instance_pP == NULL) {
LOG_E(NR_RRC, "Bad NR RRC instance\n");
return;
}
if (ue_ids_pP == NULL) {
LOG_E(NR_RRC, "Trying to free a NULL NGAP UE IDs\n");
return;
}
const uint16_t ue_initial_id = ue_ids_pP->ue_initial_id;
const uint32_t gNB_ue_ngap_id = ue_ids_pP->gNB_ue_ngap_id;
if (gNB_ue_ngap_id > 0) {
h_rc = hashtable_remove(rrc_instance_pP->ngap_id2_ngap_ids, (hash_key_t)gNB_ue_ngap_id);
if (h_rc != HASH_TABLE_OK) {
LOG_W(NR_RRC, "NGAP Did not find entry in hashtable ngap_id2_ngap_ids for gNB_ue_ngap_id %u\n", gNB_ue_ngap_id);
} else {
LOG_W(NR_RRC, "NGAP removed entry in hashtable ngap_id2_ngap_ids for gNB_ue_ngap_id %u\n", gNB_ue_ngap_id);
}
}
if (ue_initial_id != UE_INITIAL_ID_INVALID) {
h_rc = hashtable_remove(rrc_instance_pP->initial_id2_ngap_ids, (hash_key_t)ue_initial_id);
if (h_rc != HASH_TABLE_OK) {
LOG_W(NR_RRC, "NGAP Did not find entry in hashtable initial_id2_ngap_ids for ue_initial_id %u\n", ue_initial_id);
} else {
LOG_W(NR_RRC, "NGAP removed entry in hashtable initial_id2_ngap_ids for ue_initial_id %u\n", ue_initial_id);
}
}
}
void
rrc_gNB_send_NGAP_UE_CAPABILITIES_IND(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *const ue_context_pP,
NR_UL_DCCH_Message_t *const ul_dcch_msg
)
//------------------------------------------------------------------------------
{
NR_UE_CapabilityRAT_ContainerList_t *ueCapabilityRATContainerList = ul_dcch_msg->message.choice.c1->choice.ueCapabilityInformation->criticalExtensions.choice.ueCapabilityInformation->ue_CapabilityRAT_ContainerList;
/* 4096 is arbitrary, should be big enough */
unsigned char buf[4096];
unsigned char *buf2;
NR_UERadioAccessCapabilityInformation_t rac;
if (ueCapabilityRATContainerList->list.count == 0) {
LOG_W(RRC, "[gNB %d][UE %x] bad UE capabilities\n", ctxt_pP->module_id, ue_context_pP->ue_context.rnti);
}
asn_enc_rval_t ret = uper_encode_to_buffer(&asn_DEF_NR_UE_CapabilityRAT_ContainerList, NULL, ueCapabilityRATContainerList, buf, 4096);
if (ret.encoded == -1) abort();
memset(&rac, 0, sizeof(NR_UERadioAccessCapabilityInformation_t));
rac.criticalExtensions.present = NR_UERadioAccessCapabilityInformation__criticalExtensions_PR_c1;
rac.criticalExtensions.choice.c1 = calloc(1,sizeof(*rac.criticalExtensions.choice.c1));
rac.criticalExtensions.choice.c1->present = NR_UERadioAccessCapabilityInformation__criticalExtensions__c1_PR_ueRadioAccessCapabilityInformation;
rac.criticalExtensions.choice.c1->choice.ueRadioAccessCapabilityInformation = calloc(1,sizeof(NR_UERadioAccessCapabilityInformation_IEs_t));
rac.criticalExtensions.choice.c1->choice.ueRadioAccessCapabilityInformation->ue_RadioAccessCapabilityInfo.buf = buf;
rac.criticalExtensions.choice.c1->choice.ueRadioAccessCapabilityInformation->ue_RadioAccessCapabilityInfo.size = (ret.encoded+7)/8;
rac.criticalExtensions.choice.c1->choice.ueRadioAccessCapabilityInformation->nonCriticalExtension = NULL;
/* 8192 is arbitrary, should be big enough */
buf2 = malloc16(8192);
if (buf2 == NULL) abort();
ret = uper_encode_to_buffer(&asn_DEF_NR_UERadioAccessCapabilityInformation, NULL, &rac, buf2, 8192);
if (ret.encoded == -1) abort();
MessageDef *msg_p;
msg_p = itti_alloc_new_message (TASK_RRC_GNB, 0, NGAP_UE_CAPABILITIES_IND);
NGAP_UE_CAPABILITIES_IND (msg_p).gNB_ue_ngap_id = ue_context_pP->ue_context.gNB_ue_ngap_id;
NGAP_UE_CAPABILITIES_IND (msg_p).ue_radio_cap.length = (ret.encoded+7)/8;
NGAP_UE_CAPABILITIES_IND (msg_p).ue_radio_cap.buffer = buf2;
itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, msg_p);
LOG_I(NR_RRC,"Send message to ngap: NGAP_UE_CAPABILITIES_IND\n");
}
//------------------------------------------------------------------------------
void
rrc_gNB_send_NGAP_PDUSESSION_RELEASE_RESPONSE(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *const ue_context_pP,
uint8_t xid
)
//------------------------------------------------------------------------------
{
int pdu_sessions_released = 0;
MessageDef *msg_p;
msg_p = itti_alloc_new_message (TASK_RRC_GNB, 0, NGAP_PDUSESSION_RELEASE_RESPONSE);
NGAP_PDUSESSION_RELEASE_RESPONSE (msg_p).gNB_ue_ngap_id = ue_context_pP->ue_context.gNB_ue_ngap_id;
for (int i = 0; i < NB_RB_MAX; i++) {
if (xid == ue_context_pP->ue_context.pduSession[i].xid) {
NGAP_PDUSESSION_RELEASE_RESPONSE (msg_p).pdusession_release[pdu_sessions_released].pdusession_id =
ue_context_pP->ue_context.pduSession[i].param.pdusession_id;
pdu_sessions_released++;
//clear
memset(&ue_context_pP->ue_context.pduSession[i], 0, sizeof(pdu_session_param_t));
}
}
NGAP_PDUSESSION_RELEASE_RESPONSE (msg_p).nb_of_pdusessions_released = pdu_sessions_released;
NGAP_PDUSESSION_RELEASE_RESPONSE (msg_p).nb_of_pdusessions_failed = ue_context_pP->ue_context.nb_release_of_pdusessions;
memcpy(&(NGAP_PDUSESSION_RELEASE_RESPONSE (msg_p).pdusessions_failed[0]), &ue_context_pP->ue_context.pdusessions_release_failed[0],
sizeof(pdusession_failed_t)*ue_context_pP->ue_context.nb_release_of_pdusessions);
ue_context_pP->ue_context.setup_pdu_sessions -= pdu_sessions_released;
LOG_I(NR_RRC,"NGAP PDUSESSION RELEASE RESPONSE: GNB_UE_NGAP_ID %u release_pdu_sessions %d setup_pdu_sessions %d \n",
NGAP_PDUSESSION_RELEASE_RESPONSE (msg_p).gNB_ue_ngap_id,
pdu_sessions_released, ue_context_pP->ue_context.setup_pdu_sessions);
itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, msg_p);
//clear xid
for(int i = 0; i < NB_RB_MAX; i++) {
ue_context_pP->ue_context.pduSession[i].xid = -1;
}
//clear release pdusessions
ue_context_pP->ue_context.nb_release_of_pdusessions = 0;
memset(&ue_context_pP->ue_context.pdusessions_release_failed[0], 0, sizeof(pdusession_failed_t)*NGAP_MAX_PDUSESSION);
}
//------------------------------------------------------------------------------
int
rrc_gNB_process_NGAP_PDUSESSION_RELEASE_COMMAND(
MessageDef *msg_p,
const char *msg_name,
instance_t instance
)
//------------------------------------------------------------------------------
{
uint32_t gNB_ue_ngap_id;
rrc_gNB_ue_context_t *ue_context_p = NULL;
protocol_ctxt_t ctxt;
pdusession_release_t pdusession_release_params[NGAP_MAX_PDUSESSION];
uint8_t nb_pdusessions_torelease;
uint8_t xid;
int i, pdusession;
uint8_t b_existed,is_existed;
uint8_t pdusession_release_drb = 0;
memcpy(&pdusession_release_params[0], &(NGAP_PDUSESSION_RELEASE_COMMAND (msg_p).pdusession_release_params[0]),
sizeof(pdusession_release_t)*NGAP_MAX_PDUSESSION);
gNB_ue_ngap_id = NGAP_PDUSESSION_RELEASE_COMMAND(msg_p).gNB_ue_ngap_id;
nb_pdusessions_torelease = NGAP_PDUSESSION_RELEASE_COMMAND(msg_p).nb_pdusessions_torelease;
if (nb_pdusessions_torelease > NGAP_MAX_PDUSESSION) {
return -1;
}
ue_context_p = rrc_gNB_get_ue_context_from_ngap_ids(instance, UE_INITIAL_ID_INVALID, gNB_ue_ngap_id);
LOG_I(NR_RRC, "[gNB %ld] Received %s: gNB_ue_ngap_id %u \n", instance, msg_name, gNB_ue_ngap_id);
if (ue_context_p != NULL) {
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, GNB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
xid = rrc_gNB_get_next_transaction_identifier(ctxt.module_id);
LOG_I(NR_RRC,"PDU Session Release Command: AMF_UE_NGAP_ID %lu GNB_UE_NGAP_ID %u release_pdusessions %d \n",
NGAP_PDUSESSION_RELEASE_COMMAND (msg_p).amf_ue_ngap_id&0x000000FFFFFFFFFF, gNB_ue_ngap_id, nb_pdusessions_torelease);
for (pdusession = 0; pdusession < nb_pdusessions_torelease; pdusession++) {
b_existed = 0;
is_existed = 0;
for (i = pdusession-1; i >= 0; i--) {
if (pdusession_release_params[pdusession].pdusession_id == pdusession_release_params[i].pdusession_id) {
is_existed = 1;
break;
}
}
if(is_existed == 1) {
// pdusession_id is existed
continue;
}
for (i = 0; i < NR_NB_RB_MAX; i++) {
if (pdusession_release_params[pdusession].pdusession_id == ue_context_p->ue_context.pduSession[i].param.pdusession_id) {
b_existed = 1;
break;
}
}
if(b_existed == 0) {
// no pdusession_id
LOG_I(NR_RRC, "no pdusession_id \n");
ue_context_p->ue_context.pdusessions_release_failed[ue_context_p->ue_context.nb_release_of_pdusessions].pdusession_id = pdusession_release_params[pdusession].pdusession_id;
ue_context_p->ue_context.pdusessions_release_failed[ue_context_p->ue_context.nb_release_of_pdusessions].cause = NGAP_CAUSE_RADIO_NETWORK;
ue_context_p->ue_context.pdusessions_release_failed[ue_context_p->ue_context.nb_release_of_pdusessions].cause_value = 30;
ue_context_p->ue_context.nb_release_of_pdusessions++;
} else {
if(ue_context_p->ue_context.pduSession[i].status == PDU_SESSION_STATUS_FAILED) {
ue_context_p->ue_context.pduSession[i].xid = xid;
continue;
} else if(ue_context_p->ue_context.pduSession[i].status == PDU_SESSION_STATUS_ESTABLISHED) {
LOG_I(NR_RRC, "RELEASE pdusession %d \n", ue_context_p->ue_context.pduSession[i].param.pdusession_id);
ue_context_p->ue_context.pduSession[i].status = PDU_SESSION_STATUS_TORELEASE;
ue_context_p->ue_context.pduSession[i].xid = xid;
pdusession_release_drb++;
} else {
// pdusession_id status NG
ue_context_p->ue_context.pdusessions_release_failed[ue_context_p->ue_context.nb_release_of_pdusessions].pdusession_id = pdusession_release_params[pdusession].pdusession_id;
ue_context_p->ue_context.pdusessions_release_failed[ue_context_p->ue_context.nb_release_of_pdusessions].cause = NGAP_CAUSE_RADIO_NETWORK;
ue_context_p->ue_context.pdusessions_release_failed[ue_context_p->ue_context.nb_release_of_pdusessions].cause_value = 0;
ue_context_p->ue_context.nb_release_of_pdusessions++;
}
}
}
if(pdusession_release_drb > 0) {
//TODO RRCReconfiguration To UE
LOG_I(NR_RRC, "Send RRCReconfiguration To UE \n");
rrc_gNB_generate_dedicatedRRCReconfiguration_release(&ctxt, ue_context_p, xid, NGAP_PDUSESSION_RELEASE_COMMAND (msg_p).nas_pdu.length, NGAP_PDUSESSION_RELEASE_COMMAND (msg_p).nas_pdu.buffer);
} else {
//gtp tunnel delete
LOG_I(NR_RRC, "gtp tunnel delete \n");
gtpv1u_gnb_delete_tunnel_req_t req={0};
req.ue_id = ue_context_p->ue_context.rnti;
for(i = 0; i < NB_RB_MAX; i++) {
if(xid == ue_context_p->ue_context.pduSession[i].xid) {
req.pdusession_id[req.num_pdusession++] = ue_context_p->ue_context.gnb_gtp_psi[i];
ue_context_p->ue_context.gnb_gtp_teid[i] = 0;
memset(&ue_context_p->ue_context.gnb_gtp_addrs[i], 0, sizeof(ue_context_p->ue_context.gnb_gtp_addrs[i]));
ue_context_p->ue_context.gnb_gtp_psi[i] = 0;
}
}
gtpv1u_delete_ngu_tunnel(instance, &req);
//NGAP_PDUSESSION_RELEASE_RESPONSE
rrc_gNB_send_NGAP_PDUSESSION_RELEASE_RESPONSE(&ctxt, ue_context_p, xid);
LOG_I(NR_RRC, "Send PDU Session Release Response \n");
}
} else {
LOG_E(NR_RRC, "PDU Session Release Command: AMF_UE_NGAP_ID %lu GNB_UE_NGAP_ID %u Error ue_context_p NULL \n",
NGAP_PDUSESSION_RELEASE_COMMAND (msg_p).amf_ue_ngap_id&0x000000FFFFFFFFFF, NGAP_PDUSESSION_RELEASE_COMMAND(msg_p).gNB_ue_ngap_id);
return -1;
}
return 0;
}
void nr_rrc_rx_tx(void) {
// check timers
// check if UEs are lost, to remove them from upper layers
//
}
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