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openairinterface5g/openair2/RRC/NR/rrc_gNB_NGAP.c
T
Robert Schmidt d1fc95a8a1 GTP: when creating a tunnel, tell which functions to use 
The GTP module is common for 4G and 5G. It hardcodes the functions to
call when creating S1U and NGU tunnels. The S1U case is both applicable
for LTE and NR (NSA), which until now was not a problem as the PDCP data
forwarding functions where called pdcp_data_req. The issue is that in this
branch, the NR PDCP functions have changed to nr_pdcp_data_req_drb().

When setting up a GTP tunnel, we now pass the PDCP data forwarding
functions into GTP, since the caller knows whether it is in 4G or 5G,
but GTP itself does not.
2023-03-31 11:53:52 +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_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 "oai_asn1.h"
#include "intertask_interface.h"
#include "nr_pdcp/nr_pdcp_oai_api.h"
#include "pdcp_primitives.h"
#include "SDAP/nr_sdap/nr_sdap.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_CauseRadioNetwork.h"
#include "f1ap_messages_types.h"
#include "openair2/E1AP/e1ap_asnc.h"
#include "NGAP_asn_constant.h"
#include "NGAP_PDUSessionResourceSetupRequestTransfer.h"
#include "NGAP_PDUSessionResourceModifyRequestTransfer.h"
#include "NGAP_ProtocolIE-Field.h"
#include "NGAP_GTPTunnel.h"
#include "NGAP_QosFlowSetupRequestItem.h"
#include "NGAP_QosFlowAddOrModifyRequestItem.h"
#include "NGAP_NonDynamic5QIDescriptor.h"
#include "conversions.h"
#include "RRC/NR/rrc_gNB_radio_bearers.h"
extern RAN_CONTEXT_t RC;
/* 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
static 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);
/*! \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;
gNB_RRC_UE_t *UE = &ue_context_pP->ue_context;
/* Saves the security key */
memcpy(UE->kgnb, security_key_pP, SECURITY_KEY_LENGTH);
memset(UE->nh, 0, SECURITY_KEY_LENGTH);
UE->nh_ncc = -1;
for (i = 0; i < 32; i++) {
sprintf(&ascii_buffer[2 * i], "%02X", UE->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->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;
gNB_RRC_UE_t *UE = &ue_context_pP->ue_context;
/* Derive the keys from kgnb */
if (UE->Srb[1].Active || UE->Srb[2].Active) {
nr_derive_key_up_enc(UE->ciphering_algorithm, UE->kgnb, &kUPenc);
}
nr_derive_key_rrc_enc(UE->ciphering_algorithm, UE->kgnb, &kRRCenc);
nr_derive_key_rrc_int(UE->integrity_algorithm, UE->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->kgnb, 32, "\nKgNB:");
LOG_DUMPMSG(NR_RRC, DEBUG_SECURITY, kRRCenc, 16,"\nKRRCenc:" );
LOG_DUMPMSG(NR_RRC, DEBUG_SECURITY, kRRCint, 16,"\nKRRCint:" );
}
}
uint8_t security_mode =
enable_ciphering ? UE->ciphering_algorithm | (UE->integrity_algorithm << 4) : 0 | (UE->integrity_algorithm << 4);
nr_pdcp_config_set_security(ctxt_pP->rntiMaybeUEid, DCCH, security_mode, 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;
gNB_RRC_UE_t *UE = &ue_context_pP->ue_context;
message_p = itti_alloc_new_message(TASK_RRC_GNB, 0, NGAP_NAS_FIRST_REQ);
ngap_nas_first_req_t *req = &NGAP_NAS_FIRST_REQ(message_p);
memset(req, 0, sizeof(*req));
req->gNB_ue_ngap_id = UE->gNB_ue_ngap_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->establishment_cause < NGAP_RRC_CAUSE_LAST, "Establishment cause invalid (%jd/%d) for gNB %d!", UE->establishment_cause, NGAP_RRC_CAUSE_LAST, ctxt_pP->module_id);
req->establishment_cause = UE->establishment_cause;
/* Forward NAS message */
req->nas_pdu.buffer = rrcSetupComplete->dedicatedNAS_Message.buf;
req->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 */
req->ue_identity.presenceMask = NGAP_UE_IDENTITIES_NONE;
/* Fill s-TMSI */
req->ue_identity.s_tmsi.amf_set_id = UE->Initialue_identity_5g_s_TMSI.amf_set_id;
req->ue_identity.s_tmsi.amf_pointer = UE->Initialue_identity_5g_s_TMSI.amf_pointer;
req->ue_identity.s_tmsi.m_tmsi = UE->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;
req->selected_plmn_identity = selected_plmn_identity;
if (rrcSetupComplete->registeredAMF != NULL) {
NR_RegisteredAMF_t *r_amf = rrcSetupComplete->registeredAMF;
req->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 */
req->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, req->ue_identity.guami.mcc, UE->rnti);
}
if (r_amf->plmn_Identity->mnc.list.count > 0) {
/* Use first indicated PLMN MNC if it is defined */
req->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, req->ue_identity.guami.mnc, UE->rnti);
}
} else {
/* TODO */
}
/* amf_Identifier */
uint32_t amf_Id = BIT_STRING_to_uint32(&r_amf->amf_Identifier);
req->ue_identity.guami.amf_region_id = amf_Id >> 16;
req->ue_identity.guami.amf_set_id = UE->Initialue_identity_5g_s_TMSI.amf_set_id;
req->ue_identity.guami.amf_pointer = UE->Initialue_identity_5g_s_TMSI.amf_pointer;
// fixme: illogical place to set UE values, should be in the function that call this one
UE->ue_guami.mcc = req->ue_identity.guami.mcc;
UE->ue_guami.mnc = req->ue_identity.guami.mnc;
UE->ue_guami.mnc_len = req->ue_identity.guami.mnc_len;
UE->ue_guami.amf_region_id = req->ue_identity.guami.amf_region_id;
UE->ue_guami.amf_set_id = req->ue_identity.guami.amf_set_id;
UE->ue_guami.amf_pointer = req->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,
req->ue_identity.guami.amf_set_id,
req->ue_identity.guami.amf_region_id,
UE->rnti);
}
itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, message_p);
}
static void fill_qos(NGAP_QosFlowSetupRequestList_t *qos, pdusession_t *session)
{
DevAssert(qos->list.count > 0);
DevAssert(qos->list.count <= NGAP_maxnoofQosFlows);
for (int qosIdx = 0; qosIdx < qos->list.count; qosIdx++) {
NGAP_QosFlowSetupRequestItem_t *qosFlowItem_p = qos->list.array[qosIdx];
// Set the QOS informations
session->qos[qosIdx].qfi = (uint8_t)qosFlowItem_p->qosFlowIdentifier;
NGAP_QosCharacteristics_t *qosChar = &qosFlowItem_p->qosFlowLevelQosParameters.qosCharacteristics;
if (qosChar->present == NGAP_QosCharacteristics_PR_nonDynamic5QI) {
if (qosChar->choice.nonDynamic5QI != NULL) {
session->qos[qosIdx].fiveQI = (uint64_t)qosChar->choice.nonDynamic5QI->fiveQI;
}
}
ngap_allocation_retention_priority_t *tmp = &session->qos[qosIdx].allocation_retention_priority;
NGAP_AllocationAndRetentionPriority_t *tmp2 = &qosFlowItem_p->qosFlowLevelQosParameters.allocationAndRetentionPriority;
tmp->priority_level = tmp2->priorityLevelARP;
tmp->pre_emp_capability = tmp2->pre_emptionCapability;
tmp->pre_emp_vulnerability = tmp2->pre_emptionVulnerability;
}
session->nb_qos = qos->list.count;
}
static int decodePDUSessionResourceSetup(pdusession_t *session)
{
NGAP_PDUSessionResourceSetupRequestTransfer_t *pdusessionTransfer;
for (int i=0; i<session->pdusessionTransfer.length; i++)
printf("%02x:",session->pdusessionTransfer.buffer[i]);
printf("\n");
asn_codec_ctx_t st = {.max_stack_size = 100 * 1000};
asn_dec_rval_t dec_rval =
aper_decode(&st, &asn_DEF_NGAP_PDUSessionResourceSetupRequestTransfer, (void **)&pdusessionTransfer, session->pdusessionTransfer.buffer, session->pdusessionTransfer.length, 0, 0);
if (dec_rval.code != RC_OK) {
LOG_E(NR_RRC, "can not decode PDUSessionResourceSetupRequestTransfer\n");
return -1;
}
for (int i = 0; i < pdusessionTransfer->protocolIEs.list.count; i++) {
NGAP_PDUSessionResourceSetupRequestTransferIEs_t *pdusessionTransfer_ies = pdusessionTransfer->protocolIEs.list.array[i];
switch (pdusessionTransfer_ies->id) {
/* optional PDUSessionAggregateMaximumBitRate */
case NGAP_ProtocolIE_ID_id_PDUSessionAggregateMaximumBitRate:
break;
/* mandatory UL-NGU-UP-TNLInformation */
case NGAP_ProtocolIE_ID_id_UL_NGU_UP_TNLInformation: {
NGAP_GTPTunnel_t *gTPTunnel_p = pdusessionTransfer_ies->value.choice.UPTransportLayerInformation.choice.gTPTunnel;
/* Set the transport layer address */
memcpy(session->upf_addr.buffer, gTPTunnel_p->transportLayerAddress.buf, gTPTunnel_p->transportLayerAddress.size);
session->upf_addr.length = gTPTunnel_p->transportLayerAddress.size * 8 - gTPTunnel_p->transportLayerAddress.bits_unused;
/* GTP tunnel endpoint ID */
OCTET_STRING_TO_INT32(&gTPTunnel_p->gTP_TEID, session->gtp_teid);
}
break;
/* optional AdditionalUL-NGU-UP-TNLInformation */
case NGAP_ProtocolIE_ID_id_AdditionalUL_NGU_UP_TNLInformation:
break;
/* optional DataForwardingNotPossible */
case NGAP_ProtocolIE_ID_id_DataForwardingNotPossible:
break;
/* mandatory PDUSessionType */
case NGAP_ProtocolIE_ID_id_PDUSessionType:
session->upf_addr.pdu_session_type = (uint8_t)pdusessionTransfer_ies->value.choice.PDUSessionType;
break;
/* optional SecurityIndication */
case NGAP_ProtocolIE_ID_id_SecurityIndication:
break;
/* optional NetworkInstance */
case NGAP_ProtocolIE_ID_id_NetworkInstance:
break;
/* mandatory QosFlowSetupRequestList */
case NGAP_ProtocolIE_ID_id_QosFlowSetupRequestList:
fill_qos(&pdusessionTransfer_ies->value.choice.QosFlowSetupRequestList, session);
break;
/* optional CommonNetworkInstance */
case NGAP_ProtocolIE_ID_id_CommonNetworkInstance:
break;
default:
LOG_E(NR_RRC, "could not found protocolIEs id %ld\n", pdusessionTransfer_ies->id);
return -1;
}
}
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_NGAP_PDUSessionResourceSetupRequestTransfer,pdusessionTransfer );
return 0;
}
//------------------------------------------------------------------------------
int rrc_gNB_process_NGAP_INITIAL_CONTEXT_SETUP_REQ(MessageDef *msg_p, instance_t instance)
//------------------------------------------------------------------------------
{
protocol_ctxt_t ctxt = {0};
ngap_initial_context_setup_req_t *req = &NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p);
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_get_ue_context(RC.nrrrc[instance], req->gNB_ue_ngap_id);
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
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 (%u)\n", instance, req->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 = req->gNB_ue_ngap_id;
// TODO add failure cause when defined!
itti_send_msg_to_task(TASK_NGAP, instance, msg_fail_p);
return (-1);
}
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, GNB_FLAG_YES, UE->rnti, 0, 0);
UE->amf_ue_ngap_id = req->amf_ue_ngap_id;
uint8_t nb_pdusessions_tosetup = req->nb_of_pdusessions;
if (nb_pdusessions_tosetup) {
AssertFatal(false, "PDU sessions in Initial context setup request not handled by E1 yet\n");
gtpv1u_gnb_create_tunnel_req_t create_tunnel_req = {0};
for (int i = 0; i < nb_pdusessions_tosetup; i++) {
UE->nb_of_pdusessions++;
if(UE->pduSession[i].status >= PDU_SESSION_STATUS_DONE)
continue;
UE->pduSession[i].status = PDU_SESSION_STATUS_NEW;
UE->pduSession[i].param = req->pdusession_param[i];
create_tunnel_req.num_tunnels++;
create_tunnel_req.pdusession_id[i] = req->pdusession_param[i].pdusession_id;
create_tunnel_req.outgoing_teid[i] = req->pdusession_param[i].gtp_teid;
// To be developped: hardcoded first flow
create_tunnel_req.outgoing_qfi[i] = req->pdusession_param[i].qos[0].qfi;
create_tunnel_req.dst_addr[i].length = req->pdusession_param[i].upf_addr.length;
memcpy(create_tunnel_req.dst_addr[i].buffer, req->pdusession_param[i].upf_addr.buffer, sizeof(create_tunnel_req.dst_addr[i].buffer));
LOG_I(NR_RRC, "PDUSESSION SETUP: local index %d teid %u, pdusession id %d \n", i, create_tunnel_req.outgoing_teid[i], create_tunnel_req.pdusession_id[i]);
}
create_tunnel_req.ue_id = UE->rnti;
gtpv1u_gnb_create_tunnel_resp_t create_tunnel_resp = {0};
int ret = gtpv1u_create_ngu_tunnel(instance, &create_tunnel_req, &create_tunnel_resp, nr_pdcp_data_req_drb, sdap_data_req);
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->rnti);
UE->ue_release_timer_ng = 1;
UE->ue_release_timer_thres_ng = 100;
UE->ue_release_timer = 0;
UE->ue_reestablishment_timer = 0;
UE->ul_failure_timer = 20000;
UE->ul_failure_timer = 0;
return (0);
}
nr_rrc_gNB_process_GTPV1U_CREATE_TUNNEL_RESP(&ctxt, &create_tunnel_resp, 0);
UE->established_pdu_sessions_flag = 1;
}
/* NAS PDU */
// this is malloced pointers, we pass it for later free()
UE->nas_pdu = req->nas_pdu;
/* security */
rrc_gNB_process_security(&ctxt, ue_context_p, &req->security_capabilities);
process_gNB_security_key(&ctxt, ue_context_p, req->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->StatusRrc == NR_RRC_RECONFIGURED) {
LOG_I(NR_RRC, "Sending rrc_gNB_send_NGAP_INITIAL_CONTEXT_SETUP_RESP, cause %ld\n", UE->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 pdu_sessions_done = 0;
int pdu_sessions_failed = 0;
msg_p = itti_alloc_new_message (TASK_RRC_ENB, 0, NGAP_INITIAL_CONTEXT_SETUP_RESP);
ngap_initial_context_setup_resp_t *resp = &NGAP_INITIAL_CONTEXT_SETUP_RESP(msg_p);
gNB_RRC_UE_t *UE = &ue_context_pP->ue_context;
resp->gNB_ue_ngap_id = UE->gNB_ue_ngap_id;
for (int pdusession = 0; pdusession < UE->nb_of_pdusessions; pdusession++) {
rrc_pdu_session_param_t *session = &UE->pduSession[pdusession];
if (session->status == PDU_SESSION_STATUS_DONE) {
pdu_sessions_done++;
resp->pdusessions[pdusession].pdusession_id = session->param.pdusession_id;
resp->pdusessions[pdusession].gtp_teid = UE->gnb_gtp_teid[pdusession];
memcpy(resp->pdusessions[pdusession].gNB_addr.buffer, UE->gnb_gtp_addrs[pdusession].buffer, 20);
resp->pdusessions[pdusession].gNB_addr.length = 4;
resp->pdusessions[pdusession].nb_of_qos_flow = session->param.nb_qos;
for (int qos_flow_index = 0; qos_flow_index < session->param.nb_qos; qos_flow_index++) {
resp->pdusessions[pdusession].associated_qos_flows[qos_flow_index].qfi = session->param.qos[qos_flow_index].qfi;
resp->pdusessions[pdusession].associated_qos_flows[qos_flow_index].qos_flow_mapping_ind = QOSFLOW_MAPPING_INDICATION_DL;
}
} else {
pdu_sessions_failed++;
resp->pdusessions_failed[pdusession].pdusession_id = session->param.pdusession_id;
// TODO add cause when it will be integrated
resp->pdusessions_failed[pdusession].cause = NGAP_CAUSE_RADIO_NETWORK;
resp->pdusessions_failed[pdusession].cause_value = NGAP_CauseRadioNetwork_unknown_PDU_session_ID;
}
}
resp->nb_of_pdusessions = pdu_sessions_done;
resp->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;
}
static 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;
gNB_RRC_UE_t *UE = &ue_context_pP->ue_context;
/* Save security parameters */
UE->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->security_capabilities.nRencryption_algorithms,
(unsigned long)UE->ciphering_algorithm,
UE->security_capabilities.nRintegrity_algorithms,
UE->integrity_algorithm);
/* Select relevant algorithms */
cipheringAlgorithm = rrc_gNB_select_ciphering(ctxt_pP, UE->security_capabilities.nRencryption_algorithms);
if (UE->ciphering_algorithm != cipheringAlgorithm) {
UE->ciphering_algorithm = cipheringAlgorithm;
changed = true;
}
integrityProtAlgorithm = rrc_gNB_select_integrity(ctxt_pP, UE->security_capabilities.nRintegrity_algorithms);
if (UE->integrity_algorithm != integrityProtAlgorithm) {
UE->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->rnti,
security_capabilities_pP,
(unsigned long)cipheringAlgorithm,
integrityProtAlgorithm,
changed ? "changed" : "same");
return changed;
}
//------------------------------------------------------------------------------
int rrc_gNB_process_NGAP_DOWNLINK_NAS(MessageDef *msg_p, instance_t instance, mui_t *rrc_gNB_mui)
//------------------------------------------------------------------------------
{
uint32_t length;
uint8_t *buffer;
protocol_ctxt_t ctxt = {0};
ngap_downlink_nas_t *req = &NGAP_DOWNLINK_NAS(msg_p);
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_get_ue_context(RC.nrrrc[instance], req->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 (%u)\n", instance, req->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_t *msg = &NGAP_NAS_NON_DELIVERY_IND(msg_fail_p);
msg->gNB_ue_ngap_id = req->gNB_ue_ngap_id;
msg->nas_pdu.length = req->nas_pdu.length;
msg->nas_pdu.buffer = req->nas_pdu.buffer;
// TODO add failure cause when defined!
itti_send_msg_to_task(TASK_NGAP, instance, msg_fail_p);
return (-1);
}
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, GNB_FLAG_YES, UE->rnti, 0, 0);
/* Create message for PDCP (DLInformationTransfer_t) */
length = do_NR_DLInformationTransfer(instance, &buffer, rrc_gNB_get_next_transaction_identifier(instance), req->nas_pdu.length, req->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.
*/
AssertFatal(!NODE_IS_DU(RC.nrrrc[ctxt.module_id]->node_type), "illegal node type DU: receiving NGAP messages at this node\n");
/* Transfer data to PDCP */
rb_id_t srb_id = UE->Srb[2].Active ? DCCH1 : DCCH;
nr_pdcp_data_req_srb(ctxt.rntiMaybeUEid, srb_id, (*rrc_gNB_mui)++, length, buffer, deliver_pdu_srb_f1, RC.nrrrc[instance]);
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;
gNB_RRC_UE_t *UE = &ue_context_pP->ue_context;
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->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;
msg_p = itti_alloc_new_message (TASK_RRC_GNB, 0, NGAP_PDUSESSION_SETUP_RESP);
ngap_pdusession_setup_resp_t *resp = &NGAP_PDUSESSION_SETUP_RESP(msg_p);
gNB_RRC_UE_t *UE = &ue_context_pP->ue_context;
resp->gNB_ue_ngap_id = UE->gNB_ue_ngap_id;
for (int pdusession = 0; pdusession < UE->nb_of_pdusessions; pdusession++) {
rrc_pdu_session_param_t *session = &UE->pduSession[pdusession];
if (session->status == PDU_SESSION_STATUS_DONE) {
pdusession_setup_t *tmp = &resp->pdusessions[pdu_sessions_done];
tmp->pdusession_id = session->param.pdusession_id;
tmp->nb_of_qos_flow = session->param.nb_qos;
tmp->gtp_teid = UE->gnb_gtp_teid[pdusession];
tmp->gNB_addr.pdu_session_type = PDUSessionType_ipv4;
tmp->gNB_addr.length = UE->gnb_gtp_addrs[pdusession].length;
memcpy(tmp->gNB_addr.buffer, UE->gnb_gtp_addrs[pdusession].buffer, tmp->gNB_addr.length);
for (int qos_flow_index = 0; qos_flow_index < tmp->nb_of_qos_flow; qos_flow_index++) {
tmp->associated_qos_flows[qos_flow_index].qfi = session->param.qos[qos_flow_index].qfi;
tmp->associated_qos_flows[qos_flow_index].qos_flow_mapping_ind = QOSFLOW_MAPPING_INDICATION_DL;
}
session->status = PDU_SESSION_STATUS_ESTABLISHED;
LOG_I(NR_RRC,
"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,
session->status,
xid,
UE->nb_of_pdusessions,
tmp->pdusession_id,
tmp->gtp_teid);
pdu_sessions_done++;
} else if (session->status != PDU_SESSION_STATUS_ESTABLISHED) {
session->status = PDU_SESSION_STATUS_FAILED;
resp->pdusessions_failed[pdu_sessions_failed].pdusession_id = session->param.pdusession_id;
pdu_sessions_failed++;
// TODO add cause when it will be integrated
}
resp->nb_of_pdusessions = pdu_sessions_done;
resp->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->pdusession[pdusession].status, xid, UE->pdusession[pdusession].xid);
// }
}
if ((pdu_sessions_done > 0 || pdu_sessions_failed)) {
LOG_I(NR_RRC, "NGAP_PDUSESSION_SETUP_RESP: sending the message\n");
itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, msg_p);
}
for(int i = 0; i < NB_RB_MAX; i++) {
UE->pduSession[i].xid = -1;
}
return;
}
//------------------------------------------------------------------------------
void rrc_gNB_process_NGAP_PDUSESSION_SETUP_REQ(MessageDef *msg_p, instance_t instance)
//------------------------------------------------------------------------------
{
gNB_RRC_INST *rrc;
rrc_gNB_ue_context_t *ue_context_p = NULL;
protocol_ctxt_t ctxt={0};
ngap_pdusession_setup_req_t* msg=&NGAP_PDUSESSION_SETUP_REQ(msg_p);
ue_context_p = rrc_gNB_get_ue_context(RC.nrrrc[instance], msg->gNB_ue_ngap_id);
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
PROTOCOL_CTXT_SET_BY_MODULE_ID(&ctxt, 0, GNB_FLAG_YES, UE->rnti, 0, 0, 0);
rrc = RC.nrrrc[ctxt.module_id];
LOG_I(NR_RRC, "[gNB %ld] gNB_ue_ngap_id %u \n", instance, msg->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 (%u)\n", instance, msg->gNB_ue_ngap_id);
msg_fail_p = itti_alloc_new_message(TASK_RRC_GNB, 0, NGAP_PDUSESSION_SETUP_REQUEST_FAIL);
NGAP_PDUSESSION_SETUP_FAIL(msg_fail_p).gNB_ue_ngap_id = msg->gNB_ue_ngap_id;
// TODO add failure cause when defined!
itti_send_msg_to_task (TASK_NGAP, instance, msg_fail_p);
return ;
}
UE->gNB_ue_ngap_id = msg->gNB_ue_ngap_id;
UE->amf_ue_ngap_id = msg->amf_ue_ngap_id;
e1ap_bearer_setup_req_t bearer_req = {0};
for (int i = 0; i < msg->nb_pdusessions_tosetup; i++) {
rrc_pdu_session_param_t *pduSession = find_pduSession(UE, msg->pdusession_setup_params[i].pdusession_id, true);
pdusession_t *session = &pduSession->param;
LOG_I(NR_RRC, "Adding pdusession %d, total nb of sessions %d\n", session->pdusession_id, UE->nb_of_pdusessions);
session->pdusession_id = msg->pdusession_setup_params[i].pdusession_id;
session->nas_pdu = msg->pdusession_setup_params[i].nas_pdu;
session->pdusessionTransfer = msg->pdusession_setup_params[i].pdusessionTransfer;
decodePDUSessionResourceSetup(session);
bearer_req.gNB_cu_cp_ue_id = msg->gNB_ue_ngap_id;
bearer_req.rnti = UE->rnti;
bearer_req.cipheringAlgorithm = UE->ciphering_algorithm;
memcpy(bearer_req.encryptionKey, UE->kgnb, sizeof(UE->kgnb));
bearer_req.integrityProtectionAlgorithm = UE->integrity_algorithm;
memcpy(bearer_req.integrityProtectionKey, UE->kgnb, sizeof(UE->kgnb));
bearer_req.ueDlAggMaxBitRate = msg->ueAggMaxBitRateDownlink;
pdu_session_to_setup_t *pdu = bearer_req.pduSession + bearer_req.numPDUSessions;
bearer_req.numPDUSessions++;
pdu->sessionId = session->pdusession_id;
pdu->sst = msg->allowed_nssai[i].sST;
pdu->integrityProtectionIndication = rrc->security.do_drb_integrity ? E1AP_IntegrityProtectionIndication_required : E1AP_IntegrityProtectionIndication_not_needed;
pdu->confidentialityProtectionIndication = rrc->security.do_drb_ciphering ? E1AP_ConfidentialityProtectionIndication_required : E1AP_ConfidentialityProtectionIndication_not_needed;
pdu->teId = session->gtp_teid;
memcpy(&pdu->tlAddress, session->upf_addr.buffer, 4); // Fixme: dirty IPv4 target
pdu->numDRB2Setup = 1; // One DRB per PDU Session. TODO: Remove hardcoding
for (int j=0; j < pdu->numDRB2Setup; j++) {
DRB_nGRAN_to_setup_t *drb = pdu->DRBnGRanList + j;
drb->id = i + j + 1;
drb->defaultDRB = E1AP_DefaultDRB_true;
drb->sDAP_Header_UL = !(rrc->configuration.enable_sdap);
drb->sDAP_Header_DL = !(rrc->configuration.enable_sdap);
drb->pDCP_SN_Size_UL = E1AP_PDCP_SN_Size_s_18;
drb->pDCP_SN_Size_DL = E1AP_PDCP_SN_Size_s_18;
drb->discardTimer = E1AP_DiscardTimer_infinity;
drb->reorderingTimer = E1AP_T_Reordering_ms0;
drb->rLC_Mode = E1AP_RLC_Mode_rlc_am;
drb->numCellGroups = 1; // assume one cell group associated with a DRB
for (int k=0; k < drb->numCellGroups; k++) {
cell_group_t *cellGroup = drb->cellGroupList + k;
cellGroup->id = 0; // MCG
}
drb->numQosFlow2Setup = session->nb_qos;
for (int k=0; k < drb->numQosFlow2Setup; k++) {
qos_flow_to_setup_t *qos = drb->qosFlows + k;
qos->id = session->qos[k].qfi;
qos->fiveQI = session->qos[k].fiveQI;
qos->fiveQI_type = session->qos[k].fiveQI_type;
qos->qoSPriorityLevel = session->qos[k].allocation_retention_priority.priority_level;
qos->pre_emptionCapability = session->qos[k].allocation_retention_priority.pre_emp_capability;
qos->pre_emptionVulnerability = session->qos[k].allocation_retention_priority.pre_emp_vulnerability;
}
}
}
rrc->cucp_cuup.bearer_context_setup(&bearer_req, instance);
return;
}
static void fill_qos2(NGAP_QosFlowAddOrModifyRequestList_t *qos, pdusession_t *session)
{
// we need to duplicate the function fill_qos because all data types are slightly different
DevAssert(qos->list.count > 0);
DevAssert(qos->list.count <= NGAP_maxnoofQosFlows);
for (int qosIdx = 0; qosIdx < qos->list.count; qosIdx++) {
NGAP_QosFlowAddOrModifyRequestItem_t *qosFlowItem_p = qos->list.array[qosIdx];
// Set the QOS informations
session->qos[qosIdx].qfi = (uint8_t)qosFlowItem_p->qosFlowIdentifier;
NGAP_QosCharacteristics_t *qosChar = &qosFlowItem_p->qosFlowLevelQosParameters->qosCharacteristics;
if (qosChar->present == NGAP_QosCharacteristics_PR_nonDynamic5QI) {
if (qosChar->choice.nonDynamic5QI != NULL) {
session->qos[qosIdx].fiveQI = (uint64_t)qosChar->choice.nonDynamic5QI->fiveQI;
}
} else if (qosChar->present == NGAP_QosCharacteristics_PR_dynamic5QI) {
// TODO
}
ngap_allocation_retention_priority_t *tmp = &session->qos[qosIdx].allocation_retention_priority;
NGAP_AllocationAndRetentionPriority_t *tmp2 = &qosFlowItem_p->qosFlowLevelQosParameters->allocationAndRetentionPriority;
tmp->priority_level = tmp2->priorityLevelARP;
tmp->pre_emp_capability = tmp2->pre_emptionCapability;
tmp->pre_emp_vulnerability = tmp2->pre_emptionVulnerability;
}
session->nb_qos = qos->list.count;
}
static void decodePDUSessionResourceModify(pdusession_t *param, const ngap_pdu_t pdu)
{
NGAP_PDUSessionResourceModifyRequestTransfer_t *pdusessionTransfer;
asn_dec_rval_t dec_rval = aper_decode(NULL, &asn_DEF_NGAP_PDUSessionResourceModifyRequestTransfer, (void **)&pdusessionTransfer, pdu.buffer, pdu.length, 0, 0);
if (dec_rval.code != RC_OK) {
LOG_E(NR_RRC, "could not decode PDUSessionResourceModifyRequestTransfer\n");
return;
}
for (int j = 0; j < pdusessionTransfer->protocolIEs.list.count; j++) {
NGAP_PDUSessionResourceModifyRequestTransferIEs_t *pdusessionTransfer_ies = pdusessionTransfer->protocolIEs.list.array[j];
switch (pdusessionTransfer_ies->id) {
/* optional PDUSessionAggregateMaximumBitRate */
case NGAP_ProtocolIE_ID_id_PDUSessionAggregateMaximumBitRate:
// TODO
LOG_E(NR_RRC, "Cant' handle NGAP_ProtocolIE_ID_id_PDUSessionAggregateMaximumBitRate\n");
break;
/* optional UL-NGU-UP-TNLModifyList */
case NGAP_ProtocolIE_ID_id_UL_NGU_UP_TNLModifyList:
// TODO
LOG_E(NR_RRC, "Cant' handle NGAP_ProtocolIE_ID_id_UL_NGU_UP_TNLModifyList\n");
break;
/* optional NetworkInstance */
case NGAP_ProtocolIE_ID_id_NetworkInstance:
// TODO
LOG_E(NR_RRC, "Cant' handle NGAP_ProtocolIE_ID_id_NetworkInstance\n");
break;
/* optional QosFlowAddOrModifyRequestList */
case NGAP_ProtocolIE_ID_id_QosFlowAddOrModifyRequestList:
fill_qos2(&pdusessionTransfer_ies->value.choice.QosFlowAddOrModifyRequestList, param);
break;
/* optional QosFlowToReleaseList */
case NGAP_ProtocolIE_ID_id_QosFlowToReleaseList:
// TODO
LOG_E(NR_RRC, "Can't handle NGAP_ProtocolIE_ID_id_QosFlowToReleaseList\n");
break;
/* optional AdditionalUL-NGU-UP-TNLInformation */
case NGAP_ProtocolIE_ID_id_AdditionalUL_NGU_UP_TNLInformation:
// TODO
LOG_E(NR_RRC, "Cant' handle NGAP_ProtocolIE_ID_id_AdditionalUL_NGU_UP_TNLInformation\n");
break;
/* optional CommonNetworkInstance */
case NGAP_ProtocolIE_ID_id_CommonNetworkInstance:
// TODO
LOG_E(NR_RRC, "Cant' handle NGAP_ProtocolIE_ID_id_CommonNetworkInstance\n");
break;
default:
LOG_E(NR_RRC, "could not found protocolIEs id %ld\n", pdusessionTransfer_ies->id);
return;
}
}
ASN_STRUCT_FREE(asn_DEF_NGAP_PDUSessionResourceModifyRequestTransfer,pdusessionTransfer );
}
//------------------------------------------------------------------------------
int rrc_gNB_process_NGAP_PDUSESSION_MODIFY_REQ(MessageDef *msg_p, instance_t instance)
//------------------------------------------------------------------------------
{
rrc_gNB_ue_context_t *ue_context_p = NULL;
protocol_ctxt_t ctxt;
ngap_pdusession_modify_req_t *req = &NGAP_PDUSESSION_MODIFY_REQ(msg_p);
ue_context_p = rrc_gNB_get_ue_context(RC.nrrrc[instance], req->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 (%u)\n", instance, req->gNB_ue_ngap_id);
// TO implement return setup failed
return (-1);
}
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, GNB_FLAG_YES, UE->rnti, 0, 0);
ctxt.eNB_index = 0;
uint8_t nb_of_failed_pdusessions = 0;
for (int i = 0; i < req->nb_pdusessions_tomodify; i++) {
int j;
for (j = 0; j < UE->nb_of_pdusessions; j++)
if (UE->modify_pdusession[j].param.pdusession_id == req->pdusession_modify_params[j].pdusession_id)
break;
if (j == UE->nb_of_pdusessions) {
LOG_W(NR_RRC, "To finish, modify a not existing pdu session\n");
// handle multiple pdu session id
LOG_D(NR_RRC, "handle multiple pdu session id \n");
UE->modify_pdusession[j].status = PDU_SESSION_STATUS_NEW;
UE->modify_pdusession[j].param.pdusession_id = req->pdusession_modify_params[j].pdusession_id;
UE->modify_pdusession[j].cause = NGAP_CAUSE_RADIO_NETWORK;
UE->modify_pdusession[i].cause_value = NGAP_CauseRadioNetwork_unknown_PDU_session_ID;
nb_of_failed_pdusessions++;
} else {
UE->modify_pdusession[j].status = PDU_SESSION_STATUS_NEW;
UE->modify_pdusession[j].param.pdusession_id = req->pdusession_modify_params[i].pdusession_id;
UE->modify_pdusession[j].cause = NGAP_CAUSE_RADIO_NETWORK;
UE->modify_pdusession[j].cause_value = NGAP_CauseRadioNetwork_multiple_PDU_session_ID_instances;
UE->modify_pdusession[j].status = PDU_SESSION_STATUS_NEW;
UE->modify_pdusession[j].param.pdusession_id = req->pdusession_modify_params[i].pdusession_id;
UE->modify_pdusession[j].cause = NGAP_CAUSE_NOTHING;
if (req->pdusession_modify_params[i].nas_pdu.buffer != NULL) {
UE->modify_pdusession[i].param.nas_pdu = req->pdusession_modify_params[i].nas_pdu;
}
// Save new pdu session parameters, qos, upf addr, teid
decodePDUSessionResourceModify(&UE->modify_pdusession[j].param, UE->modify_pdusession[i].param.pdusessionTransfer);
UE->modify_pdusession[j].param.upf_addr = UE->pduSession[j].param.upf_addr;
UE->modify_pdusession[j].param.gtp_teid = UE->pduSession[j].param.gtp_teid;
}
}
UE->nb_of_modify_pdusessions = req->nb_pdusessions_tomodify - nb_of_failed_pdusessions;
UE->nb_of_failed_pdusessions = nb_of_failed_pdusessions;
if (UE->nb_of_failed_pdusessions < UE->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");
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_t *msg = &NGAP_PDUSESSION_MODIFY_RESP(msg_fail_p);
msg->gNB_ue_ngap_id = req->gNB_ue_ngap_id;
msg->nb_of_pdusessions = 0;
for (int i = 0; i < UE->nb_of_failed_pdusessions; i++) {
msg->pdusessions_failed[i].pdusession_id = UE->modify_pdusession[i].param.pdusession_id;
msg->pdusessions_failed[i].cause = UE->modify_pdusession[i].cause;
msg->pdusessions_failed[i].cause_value = UE->modify_pdusession[i].cause_value;
}
msg->nb_of_pdusessions_failed = UE->nb_of_failed_pdusessions;
itti_send_msg_to_task(TASK_NGAP, instance, msg_fail_p);
UE->nb_of_modify_pdusessions = 0;
UE->nb_of_failed_pdusessions = 0;
memset(UE->modify_pdusession, 0, sizeof(UE->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;
uint8_t pdu_sessions_failed = 0;
uint8_t pdu_sessions_done = 0;
gNB_RRC_UE_t *UE = &ue_context_pP->ue_context;
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);
}
ngap_pdusession_modify_resp_t *resp = &NGAP_PDUSESSION_MODIFY_RESP(msg_p);
LOG_I(NR_RRC, "send message NGAP_PDUSESSION_MODIFY_RESP \n");
resp->gNB_ue_ngap_id = UE->gNB_ue_ngap_id;
for (int i = 0; i < UE->nb_of_modify_pdusessions; i++) {
if (xid != UE->modify_pdusession[i].xid) {
LOG_W(NR_RRC, "xid does not correspond (context pdu session index %d, status %d, xid %d/%d) \n ", i, UE->modify_pdusession[i].status, xid, UE->modify_pdusession[i].xid);
continue;
}
if (UE->modify_pdusession[i].status == PDU_SESSION_STATUS_DONE) {
rrc_pdu_session_param_t *pduSession = find_pduSession(UE, UE->modify_pdusession[i].param.pdusession_id, false);
if (pduSession) {
LOG_I(NR_RRC, "update pdu session %d \n", pduSession->param.pdusession_id);
// Update UE->pduSession
pduSession->status = PDU_SESSION_STATUS_ESTABLISHED;
pduSession->cause = NGAP_CAUSE_NOTHING;
for (int qos_flow_index = 0; qos_flow_index < UE->modify_pdusession[i].param.nb_qos; qos_flow_index++) {
pduSession->param.qos[qos_flow_index] = UE->modify_pdusession[i].param.qos[qos_flow_index];
}
resp->pdusessions[pdu_sessions_done].pdusession_id = UE->modify_pdusession[i].param.pdusession_id;
for (int qos_flow_index = 0; qos_flow_index < UE->modify_pdusession[i].param.nb_qos; qos_flow_index++) {
resp->pdusessions[pdu_sessions_done].qos[qos_flow_index].qfi = UE->modify_pdusession[i].param.qos[qos_flow_index].qfi;
}
resp->pdusessions[pdu_sessions_done].pdusession_id = UE->modify_pdusession[i].param.pdusession_id;
resp->pdusessions[pdu_sessions_done].nb_of_qos_flow = UE->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->modify_pdusession[i].status,
xid,
UE->nb_of_modify_pdusessions,
resp->pdusessions[pdu_sessions_done].pdusession_id);
pdu_sessions_done++;
} else {
LOG_W(NR_RRC, "PDU SESSION modify of a not existing pdu session %d \n", UE->modify_pdusession[i].param.pdusession_id);
resp->pdusessions_failed[pdu_sessions_failed].pdusession_id = UE->modify_pdusession[i].param.pdusession_id;
resp->pdusessions_failed[pdu_sessions_failed].cause = NGAP_CAUSE_RADIO_NETWORK;
resp->pdusessions_failed[pdu_sessions_failed].cause_value = NGAP_CauseRadioNetwork_unknown_PDU_session_ID;
pdu_sessions_failed++;
}
} else if ((UE->modify_pdusession[i].status == PDU_SESSION_STATUS_NEW) || (UE->modify_pdusession[i].status == PDU_SESSION_STATUS_ESTABLISHED)) {
LOG_D(NR_RRC, "PDU SESSION is NEW or already ESTABLISHED\n");
} else if (UE->modify_pdusession[i].status == PDU_SESSION_STATUS_FAILED) {
resp->pdusessions_failed[pdu_sessions_failed].pdusession_id = UE->modify_pdusession[i].param.pdusession_id;
resp->pdusessions_failed[pdu_sessions_failed].cause = UE->modify_pdusession[i].cause;
resp->pdusessions_failed[pdu_sessions_failed].cause_value = UE->modify_pdusession[i].cause_value;
pdu_sessions_failed++;
}
else
LOG_W(NR_RRC,
"Modify pdu session %d, unknown state %d \n ",
UE->modify_pdusession[i].param.pdusession_id,
UE->modify_pdusession[i].status);
}
resp->nb_of_pdusessions = pdu_sessions_done;
resp->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\n", UE->nb_of_modify_pdusessions, UE->nb_of_pdusessions);
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 {
const gNB_RRC_UE_t *UE = &ue_context_pP->ue_context;
MessageDef *msg = itti_alloc_new_message(TASK_RRC_GNB, 0, NGAP_UE_CONTEXT_RELEASE_REQ);
ngap_ue_release_req_t *req = &NGAP_UE_CONTEXT_RELEASE_REQ(msg);
memset(req, 0, sizeof(*req));
req->gNB_ue_ngap_id = UE->gNB_ue_ngap_id;
req->cause = causeP;
req->cause_value = cause_valueP;
for (int i = 0; i < UE->nb_of_pdusessions; i++) {
req->pdusessions[i].pdusession_id = UE->pduSession[i].param.pdusession_id;
req->nb_of_pdusessions++;
}
itti_send_msg_to_task(TASK_NGAP, GNB_MODULE_ID_TO_INSTANCE(gnb_mod_idP), msg);
}
}
/*------------------------------------------------------------------------------*/
int rrc_gNB_process_NGAP_UE_CONTEXT_RELEASE_REQ(MessageDef *msg_p, instance_t instance)
{
uint32_t gNB_ue_ngap_id;
gNB_ue_ngap_id = NGAP_UE_CONTEXT_RELEASE_REQ(msg_p).gNB_ue_ngap_id;
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_get_ue_context(RC.nrrrc[instance], 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, instance_t instance)
{
//-----------------------------------------------------------------------------
uint32_t gNB_ue_ngap_id = 0;
protocol_ctxt_t ctxt;
gNB_ue_ngap_id = NGAP_UE_CONTEXT_RELEASE_COMMAND(msg_p).gNB_ue_ngap_id;
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_get_ue_context(RC.nrrrc[instance], 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);
return -1;
}
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
UE->ue_release_timer_ng = 0;
UE->ue_release_timer_thres_rrc = 1000;
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, GNB_FLAG_YES, UE->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);
}
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 */
void *buf;
NR_UERadioAccessCapabilityInformation_t rac = {0};
gNB_RRC_UE_t *UE = &ue_context_pP->ue_context;
if (ueCapabilityRATContainerList->list.count == 0) {
LOG_W(RRC, "[gNB %d][UE %x] bad UE capabilities\n", ctxt_pP->module_id, UE->rnti);
}
int ret = uper_encode_to_new_buffer(&asn_DEF_NR_UE_CapabilityRAT_ContainerList, NULL, ueCapabilityRATContainerList, &buf);
AssertFatal(ret > 0, "fail to encode ue capabilities\n");
rac.criticalExtensions.present = NR_UERadioAccessCapabilityInformation__criticalExtensions_PR_c1;
asn1cCalloc(rac.criticalExtensions.choice.c1, c1);
c1->present = NR_UERadioAccessCapabilityInformation__criticalExtensions__c1_PR_ueRadioAccessCapabilityInformation;
asn1cCalloc(c1->choice.ueRadioAccessCapabilityInformation, info);
info->ue_RadioAccessCapabilityInfo.buf = buf;
info->ue_RadioAccessCapabilityInfo.size = ret;
info->nonCriticalExtension = NULL;
/* 8192 is arbitrary, should be big enough */
void *buf2 = NULL;
int encoded = uper_encode_to_new_buffer(&asn_DEF_NR_UERadioAccessCapabilityInformation, NULL, &rac, &buf2);
AssertFatal(encoded > 0, "fail to encode ue capabilities\n");
;
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_NR_UERadioAccessCapabilityInformation, &rac);
MessageDef *msg_p;
msg_p = itti_alloc_new_message (TASK_RRC_GNB, 0, NGAP_UE_CAPABILITIES_IND);
ngap_ue_cap_info_ind_t *ind = &NGAP_UE_CAPABILITIES_IND(msg_p);
memset(ind, 0, sizeof(*ind));
ind->gNB_ue_ngap_id = UE->gNB_ue_ngap_id;
ind->ue_radio_cap.length = encoded;
ind->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;
gNB_RRC_UE_t *UE = &ue_context_pP->ue_context;
msg_p = itti_alloc_new_message (TASK_RRC_GNB, 0, NGAP_PDUSESSION_RELEASE_RESPONSE);
ngap_pdusession_release_resp_t *resp = &NGAP_PDUSESSION_RELEASE_RESPONSE(msg_p);
memset(resp, 0, sizeof(*resp));
resp->gNB_ue_ngap_id = UE->gNB_ue_ngap_id;
for (int i = 0; i < NB_RB_MAX; i++) {
if (xid == UE->pduSession[i].xid) {
resp->pdusession_release[pdu_sessions_released].pdusession_id = UE->pduSession[i].param.pdusession_id;
pdu_sessions_released++;
//clear
memset(&UE->pduSession[i], 0, sizeof(*UE->pduSession));
}
}
resp->nb_of_pdusessions_released = pdu_sessions_released;
resp->nb_of_pdusessions_failed = UE->nb_release_of_pdusessions;
memcpy(resp->pdusessions_failed, UE->pdusessions_release_failed, sizeof(pdusession_failed_t) * UE->nb_release_of_pdusessions);
LOG_E(NR_RRC, "we have to pack the array!!!\n");
UE->nb_of_pdusessions -= pdu_sessions_released;
LOG_I(NR_RRC, "NGAP PDUSESSION RELEASE RESPONSE: GNB_UE_NGAP_ID %u release_pdu_sessions %d\n", resp->gNB_ue_ngap_id, pdu_sessions_released);
itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, msg_p);
//clear xid
for(int i = 0; i < NB_RB_MAX; i++) {
UE->pduSession[i].xid = -1;
}
//clear release pdusessions
UE->nb_release_of_pdusessions = 0;
memset(UE->pdusessions_release_failed, 0, sizeof(UE->pdusessions_release_failed));
}
//------------------------------------------------------------------------------
int rrc_gNB_process_NGAP_PDUSESSION_RELEASE_COMMAND(MessageDef *msg_p, instance_t instance)
//------------------------------------------------------------------------------
{
uint32_t gNB_ue_ngap_id;
protocol_ctxt_t ctxt;
uint8_t xid;
uint8_t pdusession_release_drb = 0;
ngap_pdusession_release_command_t *cmd = &NGAP_PDUSESSION_RELEASE_COMMAND(msg_p);
gNB_ue_ngap_id = cmd->gNB_ue_ngap_id;
if (cmd->nb_pdusessions_torelease > NGAP_MAX_PDUSESSION) {
LOG_E(NR_RRC, "incorrect number of pdu session do release %d\n", cmd->nb_pdusessions_torelease);
return -1;
}
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_get_ue_context(RC.nrrrc[instance], gNB_ue_ngap_id);
if (!ue_context_p) {
LOG_E(NR_RRC, "[gNB %ld] not found ue context gNB_ue_ngap_id %u \n", instance, gNB_ue_ngap_id);
return -1;
}
LOG_I(NR_RRC, "[gNB %ld] gNB_ue_ngap_id %u \n", instance, gNB_ue_ngap_id);
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, GNB_FLAG_YES, UE->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", cmd->amf_ue_ngap_id, gNB_ue_ngap_id, cmd->nb_pdusessions_torelease);
for (int pdusession = 0; pdusession < cmd->nb_pdusessions_torelease; pdusession++) {
rrc_pdu_session_param_t *pduSession = find_pduSession(UE, cmd->pdusession_release_params[pdusession].pdusession_id, false);
if (!pduSession) {
LOG_I(NR_RRC, "no pdusession_id \n");
UE->pdusessions_release_failed[UE->nb_release_of_pdusessions].pdusession_id = cmd->pdusession_release_params[pdusession].pdusession_id;
UE->pdusessions_release_failed[UE->nb_release_of_pdusessions].cause = NGAP_CAUSE_RADIO_NETWORK;
UE->pdusessions_release_failed[UE->nb_release_of_pdusessions].cause_value = 30;
UE->nb_release_of_pdusessions++;
continue;
}
if (pduSession->status == PDU_SESSION_STATUS_FAILED) {
pduSession->xid = xid;
continue;
}
if (pduSession->status == PDU_SESSION_STATUS_ESTABLISHED) {
LOG_I(NR_RRC, "RELEASE pdusession %d \n", pduSession->param.pdusession_id);
pduSession->status = PDU_SESSION_STATUS_TORELEASE;
pduSession->xid = xid;
pdusession_release_drb++;
continue;
}
// pdusession_id status NG
UE->pdusessions_release_failed[UE->nb_release_of_pdusessions].pdusession_id = cmd->pdusession_release_params[pdusession].pdusession_id;
UE->pdusessions_release_failed[UE->nb_release_of_pdusessions].cause = NGAP_CAUSE_RADIO_NETWORK;
UE->pdusessions_release_failed[UE->nb_release_of_pdusessions].cause_value = 0;
UE->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, cmd->nas_pdu.length, cmd->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->rnti;
for (int i = 0; i < NB_RB_MAX; i++) {
if (xid == UE->pduSession[i].xid) {
req.pdusession_id[req.num_pdusession++] = UE->gnb_gtp_psi[i];
UE->gnb_gtp_teid[i] = 0;
memset(&UE->gnb_gtp_addrs[i], 0, sizeof(UE->gnb_gtp_addrs[i]));
UE->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");
}
return 0;
}
void nr_rrc_rx_tx(void) {
// check timers
// check if UEs are lost, to remove them from upper layers
//
}
/*------------------------------------------------------------------------------*/
int rrc_gNB_process_PAGING_IND(MessageDef *msg_p, instance_t instance)
{
for (uint16_t tai_size = 0; tai_size < NGAP_PAGING_IND(msg_p).tai_size; tai_size++) {
LOG_I(NR_RRC,"[gNB %ld] In NGAP_PAGING_IND: MCC %d, MNC %d, TAC %d\n", instance, NGAP_PAGING_IND(msg_p).plmn_identity[tai_size].mcc,
NGAP_PAGING_IND(msg_p).plmn_identity[tai_size].mnc, NGAP_PAGING_IND(msg_p).tac[tai_size]);
for (uint8_t j = 0; j < RC.nrrrc[instance]->configuration.num_plmn; j++) {
if (RC.nrrrc[instance]->configuration.mcc[j] == NGAP_PAGING_IND(msg_p).plmn_identity[tai_size].mcc
&& RC.nrrrc[instance]->configuration.mnc[j] == NGAP_PAGING_IND(msg_p).plmn_identity[tai_size].mnc
&& RC.nrrrc[instance]->configuration.tac == NGAP_PAGING_IND(msg_p).tac[tai_size]) {
for (uint8_t CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {
if (NODE_IS_CU(RC.nrrrc[instance]->node_type)) {
MessageDef *m = itti_alloc_new_message(TASK_RRC_GNB, 0, F1AP_PAGING_IND);
F1AP_PAGING_IND (m).mcc = RC.nrrrc[j]->configuration.mcc[0];
F1AP_PAGING_IND (m).mnc = RC.nrrrc[j]->configuration.mnc[0];
F1AP_PAGING_IND (m).mnc_digit_length = RC.nrrrc[j]->configuration.mnc_digit_length[0];
F1AP_PAGING_IND (m).nr_cellid = RC.nrrrc[j]->nr_cellid;
F1AP_PAGING_IND (m).ueidentityindexvalue = (uint16_t)(NGAP_PAGING_IND(msg_p).ue_paging_identity.s_tmsi.m_tmsi%1024);
F1AP_PAGING_IND (m).fiveg_s_tmsi = NGAP_PAGING_IND(msg_p).ue_paging_identity.s_tmsi.m_tmsi;
F1AP_PAGING_IND (m).paging_drx = NGAP_PAGING_IND(msg_p).paging_drx;
LOG_E(F1AP, "ueidentityindexvalue %u fiveg_s_tmsi %ld paging_drx %u\n", F1AP_PAGING_IND (m).ueidentityindexvalue, F1AP_PAGING_IND (m).fiveg_s_tmsi, F1AP_PAGING_IND (m).paging_drx);
itti_send_msg_to_task(TASK_CU_F1, instance, m);
} else {
rrc_gNB_generate_pcch_msg(NGAP_PAGING_IND(msg_p).ue_paging_identity.s_tmsi.m_tmsi,(uint8_t)NGAP_PAGING_IND(msg_p).paging_drx, instance, CC_id);
} // end of nodetype check
} // end of cc loop
} // end of mcc mnc check
} // end of num_plmn
} // end of tai size
return 0;
}
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