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

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/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file rrc_gNB.c
* \brief rrc procedures for gNB
* \author Navid Nikaein and Raymond Knopp , WEI-TAI CHEN
* \date 2011 - 2014 , 2018
* \version 1.0
* \company Eurecom, NTUST
* \email: navid.nikaein@eurecom.fr and raymond.knopp@eurecom.fr, kroempa@gmail.com
*/
#define RRC_GNB_C
#define RRC_GNB_C
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "nr_rrc_config.h"
#include "nr_rrc_defs.h"
#include "nr_rrc_extern.h"
#include "assertions.h"
#include "common/ran_context.h"
#include "oai_asn1.h"
#include "rrc_gNB_radio_bearers.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
#include "LAYER2/RLC/rlc.h"
#include "LAYER2/NR_MAC_gNB/mac_proto.h"
#include "common/utils/LOG/log.h"
#include "COMMON/mac_rrc_primitives.h"
#include "RRC/NR/MESSAGES/asn1_msg.h"
#include "NR_BCCH-BCH-Message.h"
#include "NR_UL-DCCH-Message.h"
#include "NR_DL-DCCH-Message.h"
#include "NR_DL-CCCH-Message.h"
#include "NR_UL-CCCH-Message.h"
#include "NR_RRCReject.h"
#include "NR_RejectWaitTime.h"
#include "NR_RRCSetup.h"
#include "NR_CellGroupConfig.h"
#include "NR_MeasResults.h"
#include "NR_UL-CCCH-Message.h"
#include "NR_RRCSetupRequest-IEs.h"
#include "NR_RRCSetupComplete-IEs.h"
#include "NR_RRCReestablishmentRequest-IEs.h"
#include "NR_MIB.h"
#include "rlc.h"
#include "platform_types.h"
#include "common/utils/LOG/vcd_signal_dumper.h"
#include "T.h"
#include "RRC/NAS/nas_config.h"
#include "RRC/NAS/rb_config.h"
#include "openair3/SECU/secu_defs.h"
#include "rrc_gNB_NGAP.h"
#include "rrc_gNB_GTPV1U.h"
#include "nr_pdcp/nr_pdcp_entity.h"
#include "nr_pdcp/nr_pdcp_oai_api.h"
#include "intertask_interface.h"
#include "SIMULATION/TOOLS/sim.h" // for taus
#include "executables/softmodem-common.h"
#include <openair2/RRC/NR/rrc_gNB_UE_context.h>
#include <openair2/X2AP/x2ap_eNB.h>
#include <openair3/SECU/key_nas_deriver.h>
#include <openair3/ocp-gtpu/gtp_itf.h>
#include <openair2/RRC/NR/nr_rrc_proto.h>
#include "openair2/LAYER2/nr_pdcp/nr_pdcp_e1_api.h"
#include "openair2/F1AP/f1ap_common.h"
#include "openair2/SDAP/nr_sdap/nr_sdap_entity.h"
#include "cucp_cuup_if.h"
#include "BIT_STRING.h"
#include "assertions.h"
//#define XER_PRINT
extern RAN_CONTEXT_t RC;
static inline uint64_t bitStr_to_uint64(BIT_STRING_t *asn);
mui_t rrc_gNB_mui = 0;
///---------------------------------------------------------------------------------------------------------------///
///---------------------------------------------------------------------------------------------------------------///
bool DURecvCb(protocol_ctxt_t *ctxt_pP,
const srb_flag_t srb_flagP,
const rb_id_t rb_idP,
const mui_t muiP,
const confirm_t confirmP,
const sdu_size_t sdu_buffer_sizeP,
unsigned char *const sdu_buffer_pP,
const pdcp_transmission_mode_t modeP,
const uint32_t *sourceL2Id,
const uint32_t *destinationL2Id) {
// The buffer comes from the stack in gtp-u thread, we have a make a separate buffer to enqueue in a inter-thread message queue
mem_block_t *sdu=get_free_mem_block(sdu_buffer_sizeP, __func__);
memcpy(sdu->data, sdu_buffer_pP, sdu_buffer_sizeP);
du_rlc_data_req(ctxt_pP,srb_flagP, false, rb_idP,muiP, confirmP, sdu_buffer_sizeP, sdu);
return true;
}
static void nr_rrc_addmod_srbs(int rnti,
const NR_SRB_ToAddModList_t *srb_list,
const struct NR_CellGroupConfig__rlc_BearerToAddModList *bearer_list)
{
if (srb_list == NULL || bearer_list == NULL)
return;
for (int i = 0; i < srb_list->list.count; i++) {
const NR_SRB_ToAddMod_t *srb = srb_list->list.array[i];
for (int j = 0; j < bearer_list->list.count; j++) {
const NR_RLC_BearerConfig_t *bearer = bearer_list->list.array[j];
if (bearer->servedRadioBearer != NULL
&& bearer->servedRadioBearer->present == NR_RLC_BearerConfig__servedRadioBearer_PR_srb_Identity
&& srb->srb_Identity == bearer->servedRadioBearer->choice.srb_Identity) {
nr_rlc_add_srb(rnti, srb->srb_Identity, bearer);
}
}
}
}
static void nr_rrc_addmod_drbs(int rnti,
const NR_DRB_ToAddModList_t *drb_list,
const struct NR_CellGroupConfig__rlc_BearerToAddModList *bearer_list)
{
if (drb_list == NULL || bearer_list == NULL)
return;
for (int i = 0; i < drb_list->list.count; i++) {
const NR_DRB_ToAddMod_t *drb = drb_list->list.array[i];
for (int j = 0; j < bearer_list->list.count; j++) {
const NR_RLC_BearerConfig_t *bearer = bearer_list->list.array[j];
if (bearer->servedRadioBearer != NULL
&& bearer->servedRadioBearer->present == NR_RLC_BearerConfig__servedRadioBearer_PR_drb_Identity
&& drb->drb_Identity == bearer->servedRadioBearer->choice.drb_Identity) {
nr_rlc_add_drb(rnti, drb->drb_Identity, bearer);
}
}
}
}
///---------------------------------------------------------------------------------------------------------------///
///---------------------------------------------------------------------------------------------------------------///
static void init_NR_SI(gNB_RRC_INST *rrc, gNB_RrcConfigurationReq *configuration)
{
LOG_D(RRC,"%s()\n\n\n\n",__FUNCTION__);
if (NODE_IS_DU(rrc->node_type) || NODE_IS_MONOLITHIC(rrc->node_type))
rrc->carrier.mib = get_new_MIB_NR(rrc->carrier.servingcellconfigcommon);
if((get_softmodem_params()->sa) && ( (NODE_IS_DU(rrc->node_type) || NODE_IS_MONOLITHIC(rrc->node_type)))) {
NR_BCCH_DL_SCH_Message_t *sib1 = get_SIB1_NR(configuration);
rrc->carrier.SIB1 = calloc(NR_MAX_SIB_LENGTH / 8, sizeof(*rrc->carrier.SIB1));
AssertFatal(rrc->carrier.SIB1 != NULL, "out of memory\n");
rrc->carrier.sizeof_SIB1 = encode_SIB1_NR(sib1, rrc->carrier.SIB1, NR_MAX_SIB_LENGTH / 8);
rrc->carrier.siblock1 = sib1;
nr_mac_config_sib1(RC.nrmac[rrc->module_id], sib1);
}
if (!NODE_IS_DU(rrc->node_type)) {
rrc->carrier.SIB23 = (uint8_t *) malloc16(100);
AssertFatal(rrc->carrier.SIB23 != NULL, "cannot allocate memory for SIB");
rrc->carrier.sizeof_SIB23 = do_SIB23_NR(&rrc->carrier, configuration);
LOG_I(NR_RRC,"do_SIB23_NR, size %d \n ", rrc->carrier.sizeof_SIB23);
AssertFatal(rrc->carrier.sizeof_SIB23 != 255,"FATAL, RC.nrrrc[mod].carrier[CC_id].sizeof_SIB23 == 255");
}
LOG_I(NR_RRC,"Done init_NR_SI\n");
if (NODE_IS_MONOLITHIC(rrc->node_type) || NODE_IS_DU(rrc->node_type)){
// update SI info
nr_mac_config_scc(RC.nrmac[rrc->module_id],
rrc->configuration.pdsch_AntennaPorts,
rrc->configuration.pusch_AntennaPorts,
rrc->configuration.sib1_tda,
rrc->configuration.minRXTXTIME,
rrc->carrier.servingcellconfigcommon);
nr_mac_config_mib(RC.nrmac[rrc->module_id], rrc->carrier.mib);
}
/* set flag to indicate that cell information is configured. This is required
* in DU to trigger F1AP_SETUP procedure */
pthread_mutex_lock(&rrc->cell_info_mutex);
rrc->cell_info_configured=1;
pthread_mutex_unlock(&rrc->cell_info_mutex);
if (get_softmodem_params()->phy_test > 0 || get_softmodem_params()->do_ra > 0) {
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_allocate_new_ue_context(rrc);
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
UE->spCellConfig = calloc(1, sizeof(struct NR_SpCellConfig));
UE->spCellConfig->spCellConfigDedicated = configuration->scd;
LOG_I(NR_RRC,"Adding new user (%p)\n",ue_context_p);
if (!NODE_IS_CU(RC.nrrrc[0]->node_type)) {
rrc_add_nsa_user(rrc,ue_context_p,NULL);
}
}
}
static void rrc_gNB_CU_DU_init(gNB_RRC_INST *rrc)
{
switch (rrc->node_type) {
case ngran_gNB_CUCP:
mac_rrc_dl_f1ap_init(&rrc->mac_rrc);
cucp_cuup_message_transfer_e1ap_init(rrc);
break;
case ngran_gNB_CU:
mac_rrc_dl_f1ap_init(&rrc->mac_rrc);
cucp_cuup_message_transfer_direct_init(rrc);
break;
case ngran_gNB:
mac_rrc_dl_direct_init(&rrc->mac_rrc);
cucp_cuup_message_transfer_direct_init(rrc);
break;
case ngran_gNB_DU:
/* silently drop this, as we currently still need the RRC at the DU. As
* soon as this is not the case anymore, we can add the AssertFatal() */
//AssertFatal(1==0,"nothing to do for DU\n");
break;
default:
AssertFatal(0 == 1, "Unknown node type %d\n", rrc->node_type);
break;
}
}
static void openair_rrc_gNB_configuration(const module_id_t gnb_mod_idP, gNB_RrcConfigurationReq *configuration)
{
protocol_ctxt_t ctxt = { 0 };
gNB_RRC_INST *rrc=RC.nrrrc[gnb_mod_idP];
PROTOCOL_CTXT_SET_BY_MODULE_ID(&ctxt, gnb_mod_idP, GNB_FLAG_YES, NOT_A_RNTI, 0, 0,gnb_mod_idP);
LOG_I(NR_RRC,
PROTOCOL_NR_RRC_CTXT_FMT" Init...\n",
PROTOCOL_NR_RRC_CTXT_ARGS(&ctxt));
AssertFatal(rrc != NULL, "RC.nrrrc not initialized!");
AssertFatal(NUMBER_OF_UE_MAX < (module_id_t)0xFFFFFFFFFFFFFFFF, " variable overflow");
AssertFatal(configuration!=NULL,"configuration input is null\n");
rrc->module_id = gnb_mod_idP;
rrc_gNB_CU_DU_init(rrc);
uid_linear_allocator_init(&rrc->uid_allocator);
RB_INIT(&rrc->rrc_ue_head);
rrc->configuration = *configuration;
rrc->carrier.servingcellconfigcommon = configuration->scc;
nr_rrc_config_ul_tda(configuration->scc,configuration->minRXTXTIME);
/// System Information INIT
pthread_mutex_init(&rrc->cell_info_mutex,NULL);
rrc->cell_info_configured = 0;
LOG_I(NR_RRC, PROTOCOL_NR_RRC_CTXT_FMT" Checking release \n",PROTOCOL_NR_RRC_CTXT_ARGS(&ctxt));
init_NR_SI(rrc, configuration);
return;
} // END openair_rrc_gNB_configuration
static void rrc_gNB_process_AdditionRequestInformation(const module_id_t gnb_mod_idP, x2ap_ENDC_sgnb_addition_req_t *m)
{
struct NR_CG_ConfigInfo *cg_configinfo = NULL;
asn_dec_rval_t dec_rval = uper_decode_complete(NULL,
&asn_DEF_NR_CG_ConfigInfo,
(void **)&cg_configinfo,
(uint8_t *)m->rrc_buffer,
(int) m->rrc_buffer_size);//m->rrc_buffer_size);
gNB_RRC_INST *rrc=RC.nrrrc[gnb_mod_idP];
if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) {
AssertFatal(1==0,"NR_UL_DCCH_MESSAGE decode error\n");
// free the memory
SEQUENCE_free(&asn_DEF_NR_CG_ConfigInfo, cg_configinfo, 1);
return;
}
xer_fprint(stdout,&asn_DEF_NR_CG_ConfigInfo, cg_configinfo);
// recreate enough of X2 EN-DC Container
AssertFatal(cg_configinfo->criticalExtensions.choice.c1->present == NR_CG_ConfigInfo__criticalExtensions__c1_PR_cg_ConfigInfo,
"ueCapabilityInformation not present\n");
parse_CG_ConfigInfo(rrc,cg_configinfo,m);
LOG_A(NR_RRC, "Successfully parsed CG_ConfigInfo of size %zu bits. (%zu bytes)\n",
dec_rval.consumed, (dec_rval.consumed +7/8));
}
//-----------------------------------------------------------------------------
unsigned int rrc_gNB_get_next_transaction_identifier(module_id_t gnb_mod_idP)
//-----------------------------------------------------------------------------
{
static unsigned int transaction_id[NUMBER_OF_gNB_MAX] = {0};
// used also in NGAP thread, so need thread safe operation
unsigned int tmp = __atomic_add_fetch(&transaction_id[gnb_mod_idP], 1, __ATOMIC_SEQ_CST);
tmp %= NR_RRC_TRANSACTION_IDENTIFIER_NUMBER;
LOG_T(NR_RRC, "generated xid is %d\n", tmp);
return tmp;
}
static void apply_macrlc_config(gNB_RRC_INST *rrc, rrc_gNB_ue_context_t *const ue_context_pP, const protocol_ctxt_t *const ctxt_pP)
{
NR_CellGroupConfig_t *cgc = get_softmodem_params()->sa ? ue_context_pP->ue_context.masterCellGroup : NULL;
nr_rrc_mac_update_cellgroup(ue_context_pP->ue_context.rnti, cgc);
nr_rrc_addmod_srbs(ctxt_pP->rntiMaybeUEid, ue_context_pP->ue_context.SRB_configList, cgc->rlc_BearerToAddModList);
nr_rrc_addmod_drbs(ctxt_pP->rntiMaybeUEid, ue_context_pP->ue_context.DRB_configList, cgc->rlc_BearerToAddModList);
}
void apply_macrlc_config_reest(gNB_RRC_INST *rrc, rrc_gNB_ue_context_t *const ue_context_pP, const protocol_ctxt_t *const ctxt_pP, ue_id_t ue_id)
{
nr_rrc_mac_update_cellgroup(ue_id, ue_context_pP->ue_context.masterCellGroup);
nr_rrc_addmod_srbs(ctxt_pP->rntiMaybeUEid,
ue_context_pP->ue_context.SRB_configList,
ue_context_pP->ue_context.masterCellGroup->rlc_BearerToAddModList);
}
//-----------------------------------------------------------------------------
static void rrc_gNB_generate_RRCSetup(instance_t instance,
rnti_t rnti,
rrc_gNB_ue_context_t *const ue_context_pP,
const uint8_t *masterCellGroup,
int masterCellGroup_len)
//-----------------------------------------------------------------------------
{
LOG_I(NR_RRC, "rrc_gNB_generate_RRCSetup for RNTI %04x\n", rnti);
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
gNB_RRC_INST *rrc = RC.nrrrc[instance];
unsigned char buf[1024];
uint8_t xid = rrc_gNB_get_next_transaction_identifier(instance);
ue_p->xids[xid] = RRC_SETUP;
int size = do_RRCSetup(ue_context_pP, buf, xid, masterCellGroup, masterCellGroup_len, &rrc->configuration);
AssertFatal(size > 0, "do_RRCSetup failed\n");
AssertFatal(size <= 1024, "memory corruption\n");
LOG_DUMPMSG(NR_RRC, DEBUG_RRC,
(char *)buf,
size,
"[MSG] RRC Setup\n");
// activate release timer, if RRCSetupComplete not received after 100 frames, remove UE
ue_context_pP->ue_context.ue_release_timer = 1;
// remove UE after 10 frames after RRCConnectionRelease is triggered
ue_context_pP->ue_context.ue_release_timer_thres = 1000;
nr_pdcp_add_srbs(true, rnti, ue_context_pP->ue_context.SRB_configList, 0, NULL, NULL);
f1ap_dl_rrc_message_t dl_rrc = {
.old_gNB_DU_ue_id = 0xFFFFFF,
.rrc_container = buf,
.rrc_container_length = size,
.rnti = ue_p->rnti,
.srb_id = CCCH
};
rrc->mac_rrc.dl_rrc_message_transfer(instance, &dl_rrc);
}
//-----------------------------------------------------------------------------
static int rrc_gNB_generate_RRCSetup_for_RRCReestablishmentRequest(module_id_t module_id, rnti_t rnti, const int CC_id)
//-----------------------------------------------------------------------------
{
LOG_I(NR_RRC, "generate RRCSetup for RRCReestablishmentRequest \n");
rrc_gNB_ue_context_t *ue_context_pP = NULL;
gNB_RRC_INST *rrc_instance_p = RC.nrrrc[module_id];
ue_context_pP = rrc_gNB_create_ue_context(rnti, rrc_instance_p, 0);
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
unsigned char buf[1024];
uint8_t xid = rrc_gNB_get_next_transaction_identifier(module_id);
ue_p->xids[xid] = RRC_SETUP_FOR_REESTABLISHMENT;
int size = do_RRCSetup(ue_context_pP, buf, xid, NULL, 0, &rrc_instance_p->configuration);
AssertFatal(size > 0, "do_RRCSetup failed\n");
AssertFatal(size <= 1024, "memory corruption\n");
AssertFatal(size>0,"Error generating RRCSetup for RRCReestablishmentRequest\n");
LOG_DUMPMSG(NR_RRC, DEBUG_RRC,
(char *)buf,
size,
"[MSG] RRC Setup\n");
LOG_D(NR_RRC, "RRC_gNB --- MAC_CONFIG_REQ (SRB1) ---> MAC_gNB for rnti %04x\n", rnti);
// update SCC and MIB/SIB (two calls)
nr_mac_config_scc(RC.nrmac[rrc_instance_p->module_id],
rrc_instance_p->configuration.pdsch_AntennaPorts,
rrc_instance_p->configuration.pusch_AntennaPorts,
rrc_instance_p->configuration.sib1_tda,
rrc_instance_p->configuration.minRXTXTIME,
rrc_instance_p->carrier.servingcellconfigcommon);
nr_mac_config_mib(RC.nrmac[rrc_instance_p->module_id], rrc_instance_p->carrier.mib);
nr_mac_config_sib1(RC.nrmac[rrc_instance_p->module_id], rrc_instance_p->carrier.siblock1);
LOG_I(NR_RRC, " [RAPROC] rnti: %04x Logical Channel DL-CCCH, Generating RRCSetup (bytes %d)\n", rnti, size);
// activate release timer, if RRCSetupComplete not received after 100 frames, remove UE
ue_context_pP->ue_context.ue_release_timer = 1;
// remove UE after 10 frames after RRCConnectionRelease is triggered
ue_context_pP->ue_context.ue_release_timer_thres = 1000;
// configure MAC
protocol_ctxt_t ctxt = {0};
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, 0, GNB_FLAG_YES, rnti, 0, 0);
apply_macrlc_config(rrc_instance_p, ue_context_pP, &ctxt);
//nr_pdcp_add_srbs(ctxt_pP->enb_flag, ctxt_pP->rntiMaybeUEid, ue_context_pP->ue_context.SRB_configList, 0, NULL, NULL);
//apply_pdcp_config(ue_context_pP,ctxt_pP);
/* init timers */
// ue_context_pP->ue_context.ue_rrc_inactivity_timer = 0;
f1ap_dl_rrc_message_t dl_rrc = {
.old_gNB_DU_ue_id = 0xFFFFFF,
.rrc_container = buf,
.rrc_container_length = size,
.rnti = ue_p->rnti,
.srb_id = CCCH
};
rrc_instance_p->mac_rrc.dl_rrc_message_transfer(module_id, &dl_rrc);
return xid;
}
static void rrc_gNB_generate_RRCReject(module_id_t module_id, rrc_gNB_ue_context_t *const ue_context_pP)
//-----------------------------------------------------------------------------
{
LOG_I(NR_RRC, "rrc_gNB_generate_RRCReject \n");
gNB_RRC_INST *rrc = RC.nrrrc[module_id];
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
unsigned char buf[1024];
int size = do_RRCReject(module_id, buf);
AssertFatal(size > 0, "do_RRCReject failed\n");
AssertFatal(size <= 1024, "memory corruption\n");
LOG_DUMPMSG(NR_RRC, DEBUG_RRC,
(char *)buf,
size,
"[MSG] RRCReject \n");
LOG_I(NR_RRC, " [RAPROC] ue %04x Logical Channel DL-CCCH, Generating NR_RRCReject (bytes %d)\n", ue_p->rnti, size);
f1ap_dl_rrc_message_t dl_rrc = {
.gNB_CU_ue_id = 0,
.gNB_DU_ue_id = 0,
.old_gNB_DU_ue_id = 0xFFFFFF,
.rrc_container = buf,
.rrc_container_length = size,
.rnti = ue_p->rnti,
.srb_id = CCCH,
.execute_duplication = 1,
.RAT_frequency_priority_information.en_dc = 0
};
rrc->mac_rrc.dl_rrc_message_transfer(module_id, &dl_rrc);
}
//-----------------------------------------------------------------------------
/*
* Process the rrc setup complete message from UE (SRB1 Active)
*/
static void rrc_gNB_process_RRCSetupComplete(const protocol_ctxt_t *const ctxt_pP, rrc_gNB_ue_context_t *ue_context_pP, NR_RRCSetupComplete_IEs_t *rrcSetupComplete)
//-----------------------------------------------------------------------------
{
LOG_A(NR_RRC, PROTOCOL_NR_RRC_CTXT_UE_FMT" [RAPROC] Logical Channel UL-DCCH, " "processing NR_RRCSetupComplete from UE (SRB1 Active)\n",
PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP));
ue_context_pP->ue_context.Srb[1].Active = 1;
ue_context_pP->ue_context.Srb[2].Active = 0;
ue_context_pP->ue_context.StatusRrc = NR_RRC_CONNECTED;
if (get_softmodem_params()->sa) {
rrc_gNB_send_NGAP_NAS_FIRST_REQ(ctxt_pP, ue_context_pP, rrcSetupComplete);
} else {
rrc_gNB_generate_SecurityModeCommand(ctxt_pP, ue_context_pP);
}
}
//-----------------------------------------------------------------------------
static void rrc_gNB_generate_defaultRRCReconfiguration(const protocol_ctxt_t *const ctxt_pP, rrc_gNB_ue_context_t *ue_context_pP)
//-----------------------------------------------------------------------------
{
gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
AssertFatal(ue_p->nb_of_pdusessions == 0, "logic bug: PDU sessions present before RRC Connection established\n");
uint8_t xid = rrc_gNB_get_next_transaction_identifier(ctxt_pP->module_id);
ue_p->xids[xid] = RRC_DEFAULT_RECONF;
struct NR_RRCReconfiguration_v1530_IEs__dedicatedNAS_MessageList *dedicatedNAS_MessageList = CALLOC(1, sizeof(*dedicatedNAS_MessageList));
/* Add all NAS PDUs to the list */
for (int i = 0; i < ue_p->nb_of_pdusessions; i++) {
if (ue_p->pduSession[i].param.nas_pdu.buffer != NULL) {
asn1cSequenceAdd(dedicatedNAS_MessageList->list, NR_DedicatedNAS_Message_t, msg);
OCTET_STRING_fromBuf(msg, (char *)ue_p->pduSession[i].param.nas_pdu.buffer, ue_p->pduSession[i].param.nas_pdu.length);
}
ue_p->pduSession[i].status = PDU_SESSION_STATUS_DONE;
LOG_D(NR_RRC, "setting the status for the default DRB (index %d) to (%d,%s)\n", i, ue_p->pduSession[i].status, "PDU_SESSION_STATUS_DONE");
}
if (ue_p->nas_pdu.length) {
asn1cSequenceAdd(dedicatedNAS_MessageList->list, NR_DedicatedNAS_Message_t, msg);
OCTET_STRING_fromBuf(msg, (char *)ue_p->nas_pdu.buffer, ue_p->nas_pdu.length);
}
/* If list is empty free the list and reset the address */
if (dedicatedNAS_MessageList->list.count == 0) {
free(dedicatedNAS_MessageList);
dedicatedNAS_MessageList = NULL;
}
NR_MeasConfig_t *measconfig = get_defaultMeasConfig(&rrc->configuration);
uint8_t buffer[RRC_BUF_SIZE] = {0};
int size = do_RRCReconfiguration(ctxt_pP,
buffer,
RRC_BUF_SIZE,
xid,
NULL, //*SRB_configList2,
NULL, //*DRB_configList,
NULL,
NULL,
NULL,
measconfig,
dedicatedNAS_MessageList,
ue_context_pP,
&rrc->carrier,
&rrc->configuration,
NULL,
ue_p->masterCellGroup);
AssertFatal(size > 0, "cannot encode RRCReconfiguration in %s()\n", __func__);
LOG_W(NR_RRC, "do_RRCReconfiguration(): size %d\n", size);
if (LOG_DEBUGFLAG(DEBUG_ASN1)) {
xer_fprint(stdout, &asn_DEF_NR_CellGroupConfig, ue_p->masterCellGroup);
}
// suspicious if it is always malloced before ?
free(ue_p->nas_pdu.buffer);
LOG_DUMPMSG(NR_RRC, DEBUG_RRC,(char *)buffer, size, "[MSG] RRC Reconfiguration\n");
/* Free all NAS PDUs */
for (int i = 0; i < ue_p->nb_of_pdusessions; i++) {
if (ue_p->pduSession[i].param.nas_pdu.buffer != NULL) {
free(ue_p->pduSession[i].param.nas_pdu.buffer);
ue_p->pduSession[i].param.nas_pdu.buffer = NULL;
}
}
LOG_I(NR_RRC, "[gNB %d] Frame %d, Logical Channel DL-DCCH, Generate NR_RRCReconfiguration (bytes %d, UE id %x)\n",
ctxt_pP->module_id,
ctxt_pP->frame,
size,
ue_context_pP->ue_context.rnti);
AssertFatal(!NODE_IS_DU(rrc->node_type), "illegal node type DU!\n");
nr_pdcp_data_req_srb(ctxt_pP->rntiMaybeUEid, DCCH, rrc_gNB_mui++, size, buffer, deliver_pdu_srb_f1, rrc);
if (NODE_IS_DU(rrc->node_type) || NODE_IS_MONOLITHIC(rrc->node_type)) {
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
nr_rrc_mac_update_cellgroup(ue_p->rnti, ue_p->masterCellGroup);
uint32_t delay_ms = ue_p->masterCellGroup && ue_p->masterCellGroup->spCellConfig && ue_p->masterCellGroup->spCellConfig->spCellConfigDedicated
&& ue_p->masterCellGroup->spCellConfig->spCellConfigDedicated->downlinkBWP_ToAddModList
? NR_RRC_RECONFIGURATION_DELAY_MS + NR_RRC_BWP_SWITCHING_DELAY_MS
: NR_RRC_RECONFIGURATION_DELAY_MS;
nr_mac_enable_ue_rrc_processing_timer(ctxt_pP->module_id, ue_p->rnti, *rrc->carrier.servingcellconfigcommon->ssbSubcarrierSpacing, delay_ms);
}
}
void fill_DRB_configList(const protocol_ctxt_t *const ctxt_pP, rrc_gNB_ue_context_t *ue_context_pP, uint8_t xid)
{
gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
int qos_flow_index = 0;
int i;
uint8_t drb_id_to_setup_start = 0;
uint8_t nb_drb_to_setup = rrc->configuration.drbs;
long drb_priority[NGAP_MAX_DRBS_PER_UE];
if (!ue_p->DRB_configList)
ue_p->DRB_configList = CALLOC(1, sizeof(*ue_p->DRB_configList));
else
memset(ue_p->DRB_configList, 0, sizeof(*ue_p->DRB_configList));
if (!ue_p->DRB_configList2[xid])
ue_p->DRB_configList2[xid] = CALLOC(1, sizeof(**ue_p->DRB_configList2));
else
memset(ue_p->DRB_configList2[xid], 0, sizeof(**ue_p->DRB_configList2));
for (i = 0; i < ue_p->nb_of_pdusessions; i++) {
if (ue_p->pduSession[i].status >= PDU_SESSION_STATUS_DONE) {
continue;
}
LOG_I(NR_RRC, "adding rnti %x pdusession %d, nb drb %d, xid %d\n", ue_p->rnti, ue_p->pduSession[i].param.pdusession_id, nb_drb_to_setup, xid);
for(long drb_id_add = 1; drb_id_add <= nb_drb_to_setup; drb_id_add++){
uint8_t drb_id;
// Reference TS23501 Table 5.7.4-1: Standardized 5QI to QoS characteristics mapping
for (qos_flow_index = 0; qos_flow_index < ue_p->pduSession[i].param.nb_qos; qos_flow_index++) {
switch (ue_p->pduSession[i].param.qos[qos_flow_index].fiveQI) {
case 1 ... 4: /* GBR */
drb_id = next_available_drb(ue_p, &ue_p->pduSession[i], GBR_FLOW);
break;
case 5 ... 9: /* Non-GBR */
if(rrc->configuration.drbs > 1) /* Force the creation from gNB Conf file - Should be used only in noS1 mode and rfsim for testing purposes. */
drb_id = next_available_drb(ue_p, &ue_p->pduSession[i], GBR_FLOW);
else
drb_id = next_available_drb(ue_p, &ue_p->pduSession[i], NONGBR_FLOW);
break;
default:
LOG_E(NR_RRC, "not supported 5qi %lu\n", ue_p->pduSession[i].param.qos[qos_flow_index].fiveQI);
ue_p->pduSession[i].status = PDU_SESSION_STATUS_FAILED;
continue;
}
drb_priority[drb_id - 1] = ue_p->pduSession[i].param.qos[qos_flow_index].allocation_retention_priority.priority_level;
if (drb_priority[drb_id - 1] < 0 || drb_priority[drb_id - 1] > NGAP_PRIORITY_LEVEL_NO_PRIORITY) {
LOG_E(NR_RRC, "invalid allocation_retention_priority.priority_level %ld set to _NO_PRIORITY\n", drb_priority[drb_id - 1]);
drb_priority[drb_id - 1] = NGAP_PRIORITY_LEVEL_NO_PRIORITY;
}
if(drb_is_active(ue_p, drb_id)){ /* Non-GBR flow using the same DRB or a GBR flow with no available DRBs*/
nb_drb_to_setup--;
} else {
generateDRB(ue_p, drb_id, &ue_p->pduSession[i], rrc->configuration.enable_sdap, rrc->security.do_drb_integrity, rrc->security.do_drb_ciphering);
NR_DRB_ToAddMod_t *DRB_config = generateDRB_ASN1(&ue_p->established_drbs[drb_id-1]);
if (drb_id_to_setup_start == 0)
drb_id_to_setup_start = DRB_config->drb_Identity;
asn1cSeqAdd(&ue_p->DRB_configList->list, DRB_config);
asn1cSeqAdd(&ue_p->DRB_configList2[xid]->list, DRB_config);
}
LOG_D(RRC, "DRB Priority %ld\n", drb_priority[drb_id]); // To supress warning for now
}
}
ue_p->pduSession[i].status = PDU_SESSION_STATUS_DONE;
ue_p->pduSession[i].xid = xid;
}
}
//-----------------------------------------------------------------------------
void
rrc_gNB_generate_dedicatedRRCReconfiguration(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *ue_context_pP,
NR_CellGroupConfig_t *cell_groupConfig_from_DU
)
//-----------------------------------------------------------------------------
{
gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
long drb_priority[NGAP_MAX_DRBS_PER_UE];
NR_CellGroupConfig_t *cellGroupConfig = NULL;
int xid = -1;
int drb_id_to_setup_start = 1;
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
NR_DRB_ToAddModList_t *DRB_configList = ue_p->DRB_configList;
int nb_drb_to_setup = DRB_configList->list.count;
struct NR_RRCReconfiguration_v1530_IEs__dedicatedNAS_MessageList *dedicatedNAS_MessageList = NULL;
NR_DedicatedNAS_Message_t *dedicatedNAS_Message = NULL;
dedicatedNAS_MessageList = CALLOC(1, sizeof(struct NR_RRCReconfiguration_v1530_IEs__dedicatedNAS_MessageList));
for (int i=0; i < nb_drb_to_setup; i++) {
NR_DRB_ToAddMod_t *DRB_config = DRB_configList->list.array[i];
if (drb_id_to_setup_start == 1)
drb_id_to_setup_start = DRB_config->drb_Identity;
int j = ue_p->nb_of_pdusessions - 1;
AssertFatal(j >= 0, "");
if (ue_p->pduSession[j].param.nas_pdu.buffer != NULL) {
dedicatedNAS_Message = CALLOC(1, sizeof(NR_DedicatedNAS_Message_t));
memset(dedicatedNAS_Message, 0, sizeof(OCTET_STRING_t));
OCTET_STRING_fromBuf(dedicatedNAS_Message, (char *)ue_p->pduSession[j].param.nas_pdu.buffer, ue_p->pduSession[j].param.nas_pdu.length);
asn1cSeqAdd(&dedicatedNAS_MessageList->list, dedicatedNAS_Message);
LOG_I(NR_RRC, "add NAS info with size %d (pdusession idx %d)\n", ue_p->pduSession[j].param.nas_pdu.length, j);
} else {
// TODO
LOG_E(NR_RRC, "no NAS info (pdusession idx %d)\n", j);
}
xid = ue_p->pduSession[j].xid;
drb_priority[DRB_config->drb_Identity - 1] = 13; // For now, we assume only one drb per pdu sessions with a default preiority (will be dynamique in future)
}
/* If list is empty free the list and reset the address */
if (dedicatedNAS_MessageList->list.count == 0) {
free(dedicatedNAS_MessageList);
dedicatedNAS_MessageList = NULL;
}
if(cell_groupConfig_from_DU == NULL){
cellGroupConfig = calloc(1, sizeof(NR_CellGroupConfig_t));
// FIXME: fill_mastercellGroupConfig() won't fill the right priorities
fill_mastercellGroupConfig(cellGroupConfig,
ue_p->masterCellGroup,
rrc->um_on_default_drb,
(drb_id_to_setup_start < 2) ? 1 : 0,
DRB_configList,
drb_priority);
}
else{
LOG_I(NR_RRC, "Master cell group originating from the DU \n");
cellGroupConfig = cell_groupConfig_from_DU;
}
AssertFatal(xid > -1, "Invalid xid %d. No PDU sessions setup to configure.\n", xid);
NR_SRB_ToAddModList_t *SRB_configList2 = NULL;
SRB_configList2 = ue_p->SRB_configList2[xid];
uint8_t buffer[RRC_BUF_SIZE] = {0};
int size = do_RRCReconfiguration(ctxt_pP,
buffer,
RRC_BUF_SIZE,
xid,
SRB_configList2,
DRB_configList,
NULL,
NULL,
NULL,
NULL,
dedicatedNAS_MessageList,
ue_context_pP,
&rrc->carrier,
&rrc->configuration,
NULL,
cellGroupConfig);
LOG_DUMPMSG(NR_RRC,DEBUG_RRC,(char *)buffer,size,"[MSG] RRC Reconfiguration\n");
/* Free all NAS PDUs */
for (int i = 0; i < ue_p->nb_of_pdusessions; i++) {
if (ue_p->pduSession[i].param.nas_pdu.buffer != NULL) {
/* Free the NAS PDU buffer and invalidate it */
free(ue_p->pduSession[i].param.nas_pdu.buffer);
ue_p->pduSession[i].param.nas_pdu.buffer = NULL;
}
}
LOG_I(NR_RRC, "[gNB %d] Frame %d, Logical Channel DL-DCCH, Generate RRCReconfiguration (bytes %d, UE RNTI %x)\n", ctxt_pP->module_id, ctxt_pP->frame, size, ue_p->rnti);
LOG_D(NR_RRC,
"[FRAME %05d][RRC_gNB][MOD %u][][--- PDCP_DATA_REQ/%d Bytes (rrcReconfiguration to UE %x MUI %d) --->][PDCP][MOD %u][RB %u]\n",
ctxt_pP->frame,
ctxt_pP->module_id,
size,
ue_p->rnti,
rrc_gNB_mui,
ctxt_pP->module_id,
DCCH);
nr_pdcp_data_req_srb(ctxt_pP->rntiMaybeUEid, DCCH, rrc_gNB_mui++, size, buffer, deliver_pdu_srb_f1, rrc);
if (NODE_IS_DU(rrc->node_type) || NODE_IS_MONOLITHIC(rrc->node_type)) {
nr_rrc_mac_update_cellgroup(ue_context_pP->ue_context.rnti, ue_context_pP->ue_context.masterCellGroup);
uint32_t delay_ms = ue_p->masterCellGroup && ue_p->masterCellGroup->spCellConfig && ue_p->masterCellGroup->spCellConfig->spCellConfigDedicated
&& ue_p->masterCellGroup->spCellConfig->spCellConfigDedicated->downlinkBWP_ToAddModList
? NR_RRC_RECONFIGURATION_DELAY_MS + NR_RRC_BWP_SWITCHING_DELAY_MS
: NR_RRC_RECONFIGURATION_DELAY_MS;
nr_mac_enable_ue_rrc_processing_timer(ctxt_pP->module_id, ue_p->rnti, *rrc->carrier.servingcellconfigcommon->ssbSubcarrierSpacing, delay_ms);
}
}
//-----------------------------------------------------------------------------
void
rrc_gNB_modify_dedicatedRRCReconfiguration(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *ue_context_pP)
//-----------------------------------------------------------------------------
{
NR_DRB_ToAddMod_t *DRB_config = NULL;
NR_DRB_ToAddModList_t *DRB_configList2 = NULL;
struct NR_RRCReconfiguration_v1530_IEs__dedicatedNAS_MessageList
*dedicatedNAS_MessageList = NULL;
int qos_flow_index = 0;
uint8_t xid = rrc_gNB_get_next_transaction_identifier(ctxt_pP->module_id);
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
ue_p->xids[xid] = RRC_DEDICATED_RECONF;
DRB_configList2 = CALLOC(1, sizeof(NR_DRB_ToAddModList_t));
memset(DRB_configList2, 0, sizeof(NR_DRB_ToAddModList_t));
dedicatedNAS_MessageList = CALLOC(1, sizeof(struct NR_RRCReconfiguration_v1530_IEs__dedicatedNAS_MessageList));
for (int i = 0; i < ue_p->nb_of_pdusessions; i++) {
// bypass the new and already configured pdu sessions
if (ue_p->pduSession[i].status >= PDU_SESSION_STATUS_DONE) {
ue_p->pduSession[i].xid = xid;
continue;
}
if (ue_p->pduSession[i].cause != NGAP_CAUSE_NOTHING) {
// set xid of failure pdu session
ue_p->pduSession[i].xid = xid;
ue_p->pduSession[i].status = PDU_SESSION_STATUS_FAILED;
continue;
}
// search exist DRB_config
int j;
for (j = 0; i < NGAP_MAX_DRBS_PER_UE; j++) {
if (ue_p->established_drbs[j].status != DRB_INACTIVE
&& ue_p->established_drbs[j].cnAssociation.sdap_config.pdusession_id == ue_p->pduSession[i].param.pdusession_id)
break;
}
if (j == NGAP_MAX_DRBS_PER_UE) {
ue_p->pduSession[i].xid = xid;
ue_p->pduSession[i].status = PDU_SESSION_STATUS_FAILED;
ue_p->pduSession[i].cause = NGAP_CAUSE_RADIO_NETWORK;
ue_p->pduSession[i].cause_value = NGAP_CauseRadioNetwork_unspecified;
continue;
}
// Reference TS23501 Table 5.7.4-1: Standardized 5QI to QoS characteristics mapping
for (qos_flow_index = 0; qos_flow_index < ue_p->pduSession[i].param.nb_qos; qos_flow_index++) {
switch (ue_p->pduSession[i].param.qos[qos_flow_index].fiveQI) {
case 1: //100ms
case 2: //150ms
case 3: //50ms
case 4: //300ms
case 5: //100ms
case 6: //300ms
case 7: //100ms
case 8: //300ms
case 9: //300ms Video (Buffered Streaming)TCP-based (e.g., www, e-mail, chat, ftp, p2p file sharing, progressive video, etc.)
// TODO
break;
default:
LOG_E(NR_RRC, "not supported 5qi %lu\n", ue_p->pduSession[i].param.qos[qos_flow_index].fiveQI);
ue_p->pduSession[i].status = PDU_SESSION_STATUS_FAILED;
ue_p->pduSession[i].xid = xid;
ue_p->pduSession[i].cause = NGAP_CAUSE_RADIO_NETWORK;
ue_p->pduSession[i].cause_value = NGAP_CauseRadioNetwork_not_supported_5QI_value;
continue;
}
LOG_I(NR_RRC,
"PDU SESSION ID %ld, DRB ID %ld (index %d), QOS flow %d, 5QI %ld \n",
DRB_config->cnAssociation->choice.sdap_Config->pdu_Session,
DRB_config->drb_Identity,
i,
qos_flow_index,
ue_p->pduSession[i].param.qos[qos_flow_index].fiveQI);
}
asn1cSeqAdd(&DRB_configList2->list, DRB_config);
ue_p->pduSession[i].status = PDU_SESSION_STATUS_DONE;
ue_p->pduSession[i].xid = xid;
if (ue_p->pduSession[i].param.nas_pdu.buffer != NULL) {
asn1cSequenceAdd(dedicatedNAS_MessageList->list,NR_DedicatedNAS_Message_t, dedicatedNAS_Message);
OCTET_STRING_fromBuf(dedicatedNAS_Message, (char *)ue_p->pduSession[i].param.nas_pdu.buffer, ue_p->pduSession[i].param.nas_pdu.length);
LOG_I(NR_RRC, "add NAS info with size %d (pdusession id %d)\n", ue_p->pduSession[i].param.nas_pdu.length, ue_p->pduSession[i].param.pdusession_id);
} else {
LOG_W(NR_RRC, "no NAS info (pdusession id %d)\n", ue_p->pduSession[i].param.pdusession_id);
}
}
/* If list is empty free the list and reset the address */
if (dedicatedNAS_MessageList->list.count == 0) {
free(dedicatedNAS_MessageList);
dedicatedNAS_MessageList = NULL;
}
uint8_t buffer[RRC_BUF_SIZE];
int size = do_RRCReconfiguration(ctxt_pP,
buffer,
RRC_BUF_SIZE,
xid,
NULL,
DRB_configList2,
NULL,
NULL,
NULL,
NULL,
dedicatedNAS_MessageList,
NULL,
NULL,
NULL,
NULL,
NULL);
LOG_DUMPMSG(NR_RRC, DEBUG_RRC, (char *)buffer, size, "[MSG] RRC Reconfiguration\n");
/* Free all NAS PDUs */
for (int i = 0; i < ue_p->nb_of_pdusessions; i++) {
if (ue_p->pduSession[i].param.nas_pdu.buffer != NULL) {
/* Free the NAS PDU buffer and invalidate it */
free(ue_p->pduSession[i].param.nas_pdu.buffer);
ue_p->pduSession[i].param.nas_pdu.buffer = NULL;
}
}
LOG_I(NR_RRC, "[gNB %d] Frame %d, Logical Channel DL-DCCH, Generate RRCReconfiguration (bytes %d, UE RNTI %x)\n", ctxt_pP->module_id, ctxt_pP->frame, size, ue_p->rnti);
LOG_D(NR_RRC,
"[FRAME %05d][RRC_gNB][MOD %u][][--- PDCP_DATA_REQ/%d Bytes (rrcReconfiguration to UE %x MUI %d) --->][PDCP][MOD %u][RB %u]\n",
ctxt_pP->frame,
ctxt_pP->module_id,
size,
ue_p->rnti,
rrc_gNB_mui,
ctxt_pP->module_id,
DCCH);
gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
nr_pdcp_data_req_srb(ctxt_pP->rntiMaybeUEid, DCCH, rrc_gNB_mui++, size, buffer, deliver_pdu_srb_f1, rrc);
if (NODE_IS_DU(rrc->node_type) || NODE_IS_MONOLITHIC(rrc->node_type)) {
uint32_t delay_ms = ue_p->masterCellGroup && ue_p->masterCellGroup->spCellConfig && ue_p->masterCellGroup->spCellConfig->spCellConfigDedicated
&& ue_p->masterCellGroup->spCellConfig->spCellConfigDedicated->downlinkBWP_ToAddModList
? NR_RRC_RECONFIGURATION_DELAY_MS + NR_RRC_BWP_SWITCHING_DELAY_MS
: NR_RRC_RECONFIGURATION_DELAY_MS;
nr_mac_enable_ue_rrc_processing_timer(ctxt_pP->module_id, ue_p->rnti, *rrc->carrier.servingcellconfigcommon->ssbSubcarrierSpacing, delay_ms);
}
}
//-----------------------------------------------------------------------------
void
rrc_gNB_generate_dedicatedRRCReconfiguration_release(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *const ue_context_pP,
uint8_t xid,
uint32_t nas_length,
uint8_t *nas_buffer)
//-----------------------------------------------------------------------------
{
int i;
NR_DRB_ToReleaseList_t **DRB_Release_configList2 = NULL;
NR_DRB_Identity_t *DRB_release;
struct NR_RRCReconfiguration_v1530_IEs__dedicatedNAS_MessageList
*dedicatedNAS_MessageList = NULL;
NR_DedicatedNAS_Message_t *dedicatedNAS_Message = NULL;
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
DRB_Release_configList2 = &ue_p->DRB_Release_configList2[xid];
if (*DRB_Release_configList2) {
free(*DRB_Release_configList2);
}
*DRB_Release_configList2 = CALLOC(1, sizeof(**DRB_Release_configList2));
for(i = 0; i < NB_RB_MAX; i++) {
if ((ue_p->pduSession[i].status == PDU_SESSION_STATUS_TORELEASE) && ue_p->pduSession[i].xid == xid) {
DRB_release = CALLOC(1, sizeof(NR_DRB_Identity_t));
*DRB_release = i+1;
asn1cSeqAdd(&(*DRB_Release_configList2)->list, DRB_release);
}
}
/* If list is empty free the list and reset the address */
if (nas_length > 0) {
dedicatedNAS_MessageList = CALLOC(1, sizeof(struct NR_RRCReconfiguration_v1530_IEs__dedicatedNAS_MessageList));
dedicatedNAS_Message = CALLOC(1, sizeof(NR_DedicatedNAS_Message_t));
memset(dedicatedNAS_Message, 0, sizeof(OCTET_STRING_t));
OCTET_STRING_fromBuf(dedicatedNAS_Message,
(char *)nas_buffer,
nas_length);
asn1cSeqAdd(&dedicatedNAS_MessageList->list, dedicatedNAS_Message);
LOG_I(NR_RRC,"add NAS info with size %d\n", nas_length);
} else {
LOG_W(NR_RRC,"dedlicated NAS list is empty\n");
}
uint8_t buffer[RRC_BUF_SIZE] = {0};
int size = do_RRCReconfiguration(ctxt_pP,
buffer,
RRC_BUF_SIZE,
xid,
NULL,
NULL,
*DRB_Release_configList2,
NULL,
NULL,
NULL,
dedicatedNAS_MessageList,
NULL,
NULL,
NULL,
NULL,
NULL);
LOG_DUMPMSG(NR_RRC,DEBUG_RRC,(char *)buffer,size, "[MSG] RRC Reconfiguration\n");
/* Free all NAS PDUs */
if (nas_length > 0) {
/* Free the NAS PDU buffer and invalidate it */
free(nas_buffer);
}
LOG_I(NR_RRC, "[gNB %d] Frame %d, Logical Channel DL-DCCH, Generate NR_RRCReconfiguration (bytes %d, UE RNTI %x)\n", ctxt_pP->module_id, ctxt_pP->frame, size, ue_p->rnti);
LOG_D(NR_RRC,
"[FRAME %05d][RRC_gNB][MOD %u][][--- PDCP_DATA_REQ/%d Bytes (rrcReconfiguration to UE %x MUI %d) --->][PDCP][MOD %u][RB %u]\n",
ctxt_pP->frame,
ctxt_pP->module_id,
size,
ue_p->rnti,
rrc_gNB_mui,
ctxt_pP->module_id,
DCCH);
gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
nr_pdcp_data_req_srb(ctxt_pP->rntiMaybeUEid, DCCH, rrc_gNB_mui++, size, buffer, deliver_pdu_srb_f1, rrc);
if (NODE_IS_DU(rrc->node_type) || NODE_IS_MONOLITHIC(rrc->node_type)) {
uint32_t delay_ms = ue_p->masterCellGroup && ue_p->masterCellGroup->spCellConfig && ue_p->masterCellGroup->spCellConfig->spCellConfigDedicated
&& ue_p->masterCellGroup->spCellConfig->spCellConfigDedicated->downlinkBWP_ToAddModList
? NR_RRC_RECONFIGURATION_DELAY_MS + NR_RRC_BWP_SWITCHING_DELAY_MS
: NR_RRC_RECONFIGURATION_DELAY_MS;
nr_mac_enable_ue_rrc_processing_timer(ctxt_pP->module_id, ue_p->rnti, *rrc->carrier.servingcellconfigcommon->ssbSubcarrierSpacing, delay_ms);
}
}
//-----------------------------------------------------------------------------
/*
* Process the RRC Reconfiguration Complete from the UE
*/
static void rrc_gNB_process_RRCReconfigurationComplete(const protocol_ctxt_t *const ctxt_pP, rrc_gNB_ue_context_t *ue_context_pP, const uint8_t xid)
{
int drb_id;
uint8_t kRRCenc[16] = {0};
uint8_t kRRCint[16] = {0};
uint8_t kUPenc[16] = {0};
uint8_t kUPint[16] = {0};
NR_DRB_ToAddModList_t *DRB_configList = ue_context_pP->ue_context.DRB_configList2[xid];
NR_SRB_ToAddModList_t *SRB_configList = ue_context_pP->ue_context.SRB_configList2[xid];
NR_DRB_ToReleaseList_t *DRB_Release_configList2 = ue_context_pP->ue_context.DRB_Release_configList2[xid];
NR_DRB_Identity_t *drb_id_p = NULL;
// uint8_t nr_DRB2LCHAN[8];
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
ue_p->ue_reestablishment_timer = 0;
/* Derive the keys from kgnb */
if (DRB_configList != NULL) {
nr_derive_key(UP_ENC_ALG, ue_p->ciphering_algorithm, ue_p->kgnb, kUPenc);
nr_derive_key(UP_INT_ALG, ue_p->integrity_algorithm, ue_p->kgnb, kUPint);
}
nr_derive_key(RRC_ENC_ALG, ue_p->ciphering_algorithm, ue_p->kgnb, kRRCenc);
nr_derive_key(RRC_INT_ALG, ue_p->integrity_algorithm, ue_p->kgnb, kRRCint);
/* Refresh SRBs/DRBs */
LOG_D(NR_RRC, "Configuring PDCP DRBs/SRBs for UE %04x\n", ue_p->rnti);
ue_id_t reestablish_ue_id = 0;
if (DRB_configList && DRB_configList->list.array[0]->reestablishPDCP && *DRB_configList->list.array[0]->reestablishPDCP == NR_DRB_ToAddMod__reestablishPDCP_true) {
for (int i = 0; i < MAX_MOBILES_PER_GNB; i++) {
nr_reestablish_rnti_map_t *nr_reestablish_rnti_map = &(RC.nrrrc[ctxt_pP->module_id])->nr_reestablish_rnti_map[i];
if (nr_reestablish_rnti_map->ue_id == ctxt_pP->rntiMaybeUEid) {
ue_context_pP->ue_context.ue_reconfiguration_after_reestablishment_counter++;
reestablish_ue_id = nr_reestablish_rnti_map[i].c_rnti;
LOG_D(NR_RRC, "Removing reestablish_rnti_map[%d] UEid %lx, RNTI %04x\n", i, nr_reestablish_rnti_map->ue_id, nr_reestablish_rnti_map->c_rnti);
// clear current C-RNTI from map
nr_reestablish_rnti_map->ue_id = 0;
nr_reestablish_rnti_map->c_rnti = 0;
break;
}
}
}
nr_pdcp_add_srbs(ctxt_pP->enb_flag, ctxt_pP->rntiMaybeUEid, SRB_configList, (ue_p->integrity_algorithm << 4) | ue_p->ciphering_algorithm, kRRCenc, kRRCint);
nr_pdcp_add_drbs(ctxt_pP->enb_flag,
ctxt_pP->rntiMaybeUEid,
reestablish_ue_id,
DRB_configList,
(ue_p->integrity_algorithm << 4) | ue_p->ciphering_algorithm,
kUPenc,
kUPint,
get_softmodem_params()->sa ? ue_p->masterCellGroup->rlc_BearerToAddModList : NULL);
/* Refresh SRBs/DRBs */
if (!NODE_IS_CU(RC.nrrrc[ctxt_pP->module_id]->node_type)) {
LOG_D(NR_RRC,"Configuring RLC DRBs/SRBs for UE %04x\n",ue_context_pP->ue_context.rnti);
const struct NR_CellGroupConfig__rlc_BearerToAddModList *bearer_list =
ue_context_pP->ue_context.masterCellGroup->rlc_BearerToAddModList;
nr_rrc_addmod_srbs(ctxt_pP->rntiMaybeUEid, SRB_configList, bearer_list);
nr_rrc_addmod_drbs(ctxt_pP->rntiMaybeUEid, DRB_configList, bearer_list);
}
/* Set the SRB active in UE context */
if (SRB_configList != NULL) {
for (int i = 0; (i < SRB_configList->list.count) && (i < 3); i++) {
if (SRB_configList->list.array[i]->srb_Identity == 1) {
ue_p->Srb[1].Active = 1;
} else if (SRB_configList->list.array[i]->srb_Identity == 2) {
ue_p->Srb[2].Active = 1;
LOG_I(NR_RRC, "[gNB %d] Frame %d CC %d : SRB2 is now active\n", ctxt_pP->module_id, ctxt_pP->frame, ue_p->primaryCC_id);
} else {
LOG_W(NR_RRC, "[gNB %d] Frame %d CC %d: invalid SRB identity %ld\n", ctxt_pP->module_id, ctxt_pP->frame, ue_p->primaryCC_id, SRB_configList->list.array[i]->srb_Identity);
}
}
free(SRB_configList);
ue_p->SRB_configList2[xid] = NULL;
}
/* Loop through DRBs and establish if necessary */
if (DRB_configList != NULL) {
for (int i = 0; i < DRB_configList->list.count; i++) {
if (DRB_configList->list.array[i]) {
drb_id = (int)DRB_configList->list.array[i]->drb_Identity;
LOG_A(NR_RRC,
"[gNB %d] Frame %d : Logical Channel UL-DCCH, Received NR_RRCReconfigurationComplete from UE rnti %lx, reconfiguring DRB %d\n",
ctxt_pP->module_id,
ctxt_pP->frame,
ctxt_pP->rntiMaybeUEid,
(int)DRB_configList->list.array[i]->drb_Identity);
//(int)*DRB_configList->list.array[i]->pdcp_Config->moreThanOneRLC->primaryPath.logicalChannel);
if (ue_p->DRB_active[drb_id - 1] == 0) {
ue_p->DRB_active[drb_id - 1] = DRB_ACTIVE;
LOG_D(NR_RRC, "[gNB %d] Frame %d: Establish RLC UM Bidirectional, DRB %d Active\n",
ctxt_pP->module_id, ctxt_pP->frame, (int)DRB_configList->list.array[i]->drb_Identity);
LOG_D(NR_RRC,
PROTOCOL_NR_RRC_CTXT_UE_FMT" RRC_gNB --- MAC_CONFIG_REQ (DRB) ---> MAC_gNB\n",
PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP));
//if (DRB_configList->list.array[i]->pdcp_Config->moreThanOneRLC->primaryPath.logicalChannel) {
// nr_DRB2LCHAN[i] = (uint8_t) * DRB_configList->list.array[i]->pdcp_Config->moreThanOneRLC->primaryPath.logicalChannel;
//}
// rrc_mac_config_req_eNB
} else { // remove LCHAN from MAC/PHY
if (ue_p->DRB_active[drb_id] == 1) {
/* TODO : It may be needed if gNB goes into full stack working. */
// DRB has just been removed so remove RLC + PDCP for DRB
/* rrc_pdcp_config_req (ctxt_pP->module_id, frameP, 1, CONFIG_ACTION_REMOVE,
(ue_mod_idP * NB_RB_MAX) + DRB2LCHAN[i],UNDEF_SECURITY_MODE);
*/
/*rrc_rlc_config_req(ctxt_pP,
SRB_FLAG_NO,
MBMS_FLAG_NO,
CONFIG_ACTION_REMOVE,
nr_DRB2LCHAN[i]);*/
}
// ue_p->DRB_active[drb_id] = 0;
LOG_D(NR_RRC, PROTOCOL_NR_RRC_CTXT_UE_FMT" RRC_eNB --- MAC_CONFIG_REQ (DRB) ---> MAC_eNB\n",
PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP));
// rrc_mac_config_req_eNB
} // end else of if (ue_p->DRB_active[drb_id] == 0)
} // end if (DRB_configList->list.array[i])
} // end for (int i = 0; i < DRB_configList->list.count; i++)
free(DRB_configList);
ue_p->DRB_configList2[xid] = NULL;
} // end if DRB_configList != NULL
if(DRB_Release_configList2 != NULL) {
for (int i = 0; i < DRB_Release_configList2->list.count; i++) {
if (DRB_Release_configList2->list.array[i]) {
drb_id_p = DRB_Release_configList2->list.array[i];
drb_id = *drb_id_p;
if (ue_p->DRB_active[drb_id] == 1) {
ue_p->DRB_active[drb_id] = 0;
}
}
}
free(DRB_Release_configList2);
ue_p->DRB_Release_configList2[xid] = NULL;
}
}
//-----------------------------------------------------------------------------
void rrc_gNB_generate_RRCReestablishment(const protocol_ctxt_t *ctxt_pP,
rrc_gNB_ue_context_t *ue_context_pP,
const uint8_t *masterCellGroup_from_DU,
NR_ServingCellConfigCommon_t *scc,
const int CC_id)
//-----------------------------------------------------------------------------
{
// int UE_id = -1;
// NR_LogicalChannelConfig_t *SRB1_logicalChannelConfig = NULL;
NR_SRB_ToAddModList_t **SRB_configList;
// NR_SRB_ToAddMod_t *SRB1_config = NULL;
// rrc_gNB_carrier_data_t *carrier = NULL;
module_id_t module_id = ctxt_pP->module_id;
gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
int enable_ciphering = 0;
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
// Need to drop spCellConfig when there is a RRCReestablishment
// Save spCellConfig in spCellConfigReestablishment to recover after Reestablishment is completed
ue_p->spCellConfigReestablishment = ue_p->masterCellGroup->spCellConfig;
ue_p->masterCellGroup->spCellConfig = NULL;
SRB_configList = &(ue_p->SRB_configList);
uint8_t buffer[RRC_BUF_SIZE] = {0};
uint8_t xid = rrc_gNB_get_next_transaction_identifier(module_id);
ue_p->xids[xid] = RRC_REESTABLISH;
int size = do_RRCReestablishment(ctxt_pP,
ue_context_pP,
CC_id,
buffer,
RRC_BUF_SIZE,
xid,
SRB_configList,
masterCellGroup_from_DU,
scc,
&rrc->carrier);
LOG_I(NR_RRC, "[RAPROC] UE %04x Logical Channel DL-DCCH, Generating NR_RRCReestablishment (bytes %d)\n", ue_p->rnti, size);
uint8_t kRRCenc[16] = {0};
uint8_t kRRCint[16] = {0};
uint8_t kUPenc[16] = {0};
/* Derive the keys from kgnb */
if (SRB_configList != NULL) {
nr_derive_key(UP_ENC_ALG, ue_p->ciphering_algorithm, ue_p->kgnb, kUPenc);
}
nr_derive_key(RRC_ENC_ALG, ue_p->ciphering_algorithm, ue_p->kgnb, kRRCenc);
nr_derive_key(RRC_INT_ALG, ue_p->integrity_algorithm, ue_p->kgnb, kRRCint);
/* Configure SRB1 for UE */
if (*SRB_configList != NULL) {
for (int cnt = 0; cnt < (*SRB_configList)->list.count; cnt++) {
if ((*SRB_configList)->list.array[cnt]->srb_Identity == 1) {
nr_pdcp_add_srbs(ctxt_pP->enb_flag,
ctxt_pP->rntiMaybeUEid,
*SRB_configList,
0,
NULL,
NULL);
}
LOG_D(NR_RRC, "UE %04x --- MAC_CONFIG_REQ (SRB1) ---> MAC_gNB\n", ue_p->rnti);
}
} // if (*SRB_configList != NULL)
LOG_I(NR_RRC, "Set PDCP security RNTI %04lx nca %ld nia %d in RRCReestablishment\n", ctxt_pP->rntiMaybeUEid, ue_p->ciphering_algorithm, ue_p->integrity_algorithm);
uint8_t security_mode =
enable_ciphering ? ue_p->ciphering_algorithm | (ue_p->integrity_algorithm << 4) : 0 | (ue_p->integrity_algorithm << 4);
nr_pdcp_config_set_security(ctxt_pP->rntiMaybeUEid,
DCCH,
security_mode,
kRRCenc,
kRRCint,
kUPenc);
if (!NODE_IS_CU(rrc->node_type)) {
apply_macrlc_config_reest(rrc, ue_context_pP, ctxt_pP, ctxt_pP->rntiMaybeUEid);
}
nr_pdcp_data_req_srb(ctxt_pP->rntiMaybeUEid, DCCH, rrc_gNB_mui++, size, buffer, deliver_pdu_srb_f1, rrc);
}
/*
* Handle RRC Reestablishment Complete Functions
*/
/// @brief Function used in RRCReestablishmentComplete procedure to reestablish the SRB2.
/// @param old_xid The old RRC transaction id.
/// @param new_xid The new RRC transaction id.
void RRCReestablishmentComplete_fill_SRB2_configList(const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *ue_context_pP,
const uint8_t old_xid,
const uint8_t new_xid)
{
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
NR_SRB_ToAddMod_t *SRB2_config = NULL;
NR_SRB_ToAddModList_t *SRB_configList = ue_p->SRB_configList;
NR_SRB_ToAddModList_t **SRB_configList2 = NULL;
SRB_configList2 = &ue_p->SRB_configList2[old_xid];
// get old configuration of SRB2
if (*SRB_configList2 != NULL) {
if ((*SRB_configList2)->list.count != 0) {
LOG_D(NR_RRC,
"RRC Reestablishment - SRB_configList2(%p) count is %d\n SRB_configList2->list.array[0] addr is %p\n",
SRB_configList2,
(*SRB_configList2)->list.count,
(*SRB_configList2)->list.array[0]);
}
for (int i = 0; (i < (*SRB_configList2)->list.count) && (i < 3); i++) {
if ((*SRB_configList2)->list.array[i]->srb_Identity == 2) {
LOG_D(NR_RRC, "RRC Reestablishment - get SRB2_config from (ue_p->SRB_configList2[%d])\n", old_xid);
SRB2_config = (*SRB_configList2)->list.array[i];
SRB2_config->reestablishPDCP = CALLOC(1, sizeof(*SRB2_config->reestablishPDCP));
*SRB2_config->reestablishPDCP = NR_SRB_ToAddMod__reestablishPDCP_true;
break;
}
}
}
SRB_configList2 = &(ue_p->SRB_configList2[new_xid]);
if (*SRB_configList2) {
free(*SRB_configList2);
LOG_D(NR_RRC, "RRC Reestablishment - free(ue_p->SRB_configList2[%d])\n", new_xid);
}
*SRB_configList2 = CALLOC(1, sizeof(**SRB_configList2));
if (SRB2_config != NULL) {
// Add SRB2 to SRB configuration list
asn1cSeqAdd(&SRB_configList->list, SRB2_config);
asn1cSeqAdd(&(*SRB_configList2)->list, SRB2_config);
LOG_D(NR_RRC, "RRC Reestablishment - Add SRB2_config (srb_Identity:%ld) to ue_p->SRB_configList\n", SRB2_config->srb_Identity);
LOG_D(NR_RRC,
"RRC Reestablishment - Add SRB2_config (srb_Identity:%ld) to ue_p->SRB_configList2[%d]\n",
SRB2_config->srb_Identity,
new_xid);
} else {
// SRB configuration list only contains SRB1.
LOG_W(NR_RRC, "RRC Reestablishment - SRB2 configuration does not exist in SRB configuration list\n");
}
ue_p->Srb[1].Active = 1;
if (get_softmodem_params()->sa) {
uint8_t send_security_mode_command = false;
nr_rrc_pdcp_config_security(ctxt_pP, ue_context_pP, send_security_mode_command);
LOG_D(NR_RRC, "RRC Reestablishment - set security successfully \n");
}
}
/// @brief Function used in RRCReestablishmentComplete procedure to reestablish the DRBs
/// that the UE previously had, it gets the information from the established_drbs
/// struct.
/// @param new_xid The new RRC transaction id.
void RRCReestablishmentComplete_fill_DRB_configList(const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *ue_context_pP,
const uint8_t new_xid)
{
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
NR_DRB_ToAddMod_t *DRB_config = NULL;
NR_DRB_ToAddModList_t **DRB_configList2 = &(ue_p->DRB_configList2[new_xid]);
if (*DRB_configList2) {
free(*DRB_configList2);
LOG_D(NR_RRC, "RRC Reestablishment - free(ue_p->DRB_configList2[%d])\n", new_xid);
}
*DRB_configList2 = CALLOC(1, sizeof(**DRB_configList2));
for (int i = 0; i < NGAP_MAX_DRBS_PER_UE; i++) {
if (ue_p->established_drbs[i].status != DRB_INACTIVE) {
ue_p->established_drbs[i].reestablishPDCP = NR_DRB_ToAddMod__reestablishPDCP_true;
DRB_config = generateDRB_ASN1(&ue_p->established_drbs[i]);
asn1cCallocOne(DRB_config->reestablishPDCP, NR_DRB_ToAddMod__reestablishPDCP_true);
asn1cSeqAdd(&(*DRB_configList2)->list, DRB_config);
}
}
}
/// @brief Function used in RRCReestablishmentComplete procedure to update the NGU Tunnels.
/// @param reestablish_rnti is the old C-RNTI
void RRCReestablishmentComplete_update_ngu_tunnel(const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *ue_context_pP,
const rnti_t reestablish_rnti)
{
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
int i = 0;
int j = 0;
int ret = 0;
if (get_softmodem_params()->sa) {
LOG_W(NR_RRC, "RRC Reestablishment - Rework identity mapping need to be done properly!\n");
gtpv1u_gnb_create_tunnel_req_t create_tunnel_req = {0};
/* Save e RAB information for later */
for (j = 0, i = 0; i < NB_RB_MAX; i++) {
if (ue_p->pduSession[i].status == PDU_SESSION_STATUS_ESTABLISHED || ue_p->pduSession[i].status == PDU_SESSION_STATUS_DONE) {
create_tunnel_req.pdusession_id[j] = ue_p->pduSession[i].param.pdusession_id;
create_tunnel_req.incoming_rb_id[j] = i + 1;
create_tunnel_req.outgoing_teid[j] = ue_p->pduSession[i].param.gtp_teid;
// to be developped, use the first QFI only
create_tunnel_req.outgoing_qfi[j] = ue_p->pduSession[i].param.qos[0].qfi;
memcpy(create_tunnel_req.dst_addr[j].buffer, ue_p->pduSession[i].param.upf_addr.buffer, sizeof(uint8_t) * 20);
create_tunnel_req.dst_addr[j].length = ue_p->pduSession[i].param.upf_addr.length;
j++;
}
}
create_tunnel_req.ue_id = ctxt_pP->rntiMaybeUEid; // warning put zero above
create_tunnel_req.num_tunnels = j;
ret = gtpv1u_update_ngu_tunnel(ctxt_pP->instance, &create_tunnel_req, reestablish_rnti);
if (ret != 0) {
LOG_E(NR_RRC, "RRC Reestablishment - gtpv1u_update_ngu_tunnel failed,start to release UE %x\n", reestablish_rnti);
ue_p->ue_release_timer_s1 = 1;
ue_p->ue_release_timer_thres_s1 = 100;
ue_p->ue_release_timer = 0;
ue_p->ue_reestablishment_timer = 0;
ue_p->ul_failure_timer = 20000; // set ul_failure to 20000 for triggering rrc_eNB_send_S1AP_UE_CONTEXT_RELEASE_REQ
ue_p->ul_failure_timer = 0;
return;
}
}
}
/// @brief Function used in RRCReestablishmentComplete procedure to update the NAS PDUSessions and the xid.
/// @param old_xid Refers to the old transaction identifier passed to rrc_gNB_process_RRCReestablishmentComplete as xid.
/// @todo parameters yet to process inside the for loop.
/// @todo should test if pdu session are Ok before! inside the for loop.
void RRCReestablishmentComplete_nas_pdu_update(rrc_gNB_ue_context_t *ue_context_pP, const uint8_t old_xid)
{
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
/* Add all NAS PDUs to the list */
for (int i = 0; i < ue_p->nb_of_pdusessions; i++) {
ue_p->pduSession[i].status = PDU_SESSION_STATUS_DONE;
ue_p->pduSession[i].xid = old_xid;
LOG_D(NR_RRC,
"RRC Reestablishment - setting the status for the default DRB (index %d) to (%d,%s)\n",
i,
ue_p->pduSession[i].status,
"PDU_SESSION_STATUS_DONE");
}
}
/// @brief Function used in RRCReestablishmentComplete procedure to Free all the NAS PDU buffers.
void RRCReestablishmentComplete_nas_pdu_free(rrc_gNB_ue_context_t *ue_context_pP)
{
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
/* Free all NAS PDUs */
for (int i = 0; i < ue_p->nb_of_pdusessions; i++) {
if (ue_p->pduSession[i].param.nas_pdu.buffer != NULL) {
/* Free the NAS PDU buffer and invalidate it */
free(ue_p->pduSession[i].param.nas_pdu.buffer);
ue_p->pduSession[i].param.nas_pdu.buffer = NULL;
}
}
}
/// @brief Function tha processes RRCReestablishmentComplete message sent by the UE, after RRCReestasblishment request.
/// @param ctxt_pP Protocol context containing information regarding the UE and gNB
/// @param reestablish_rnti is the old C-RNTI
/// @param ue_context_pP UE context container information regarding the UE
/// @param xid Transaction Identifier used in RRC messages
void rrc_gNB_process_RRCReestablishmentComplete(const protocol_ctxt_t *const ctxt_pP,
const rnti_t reestablish_rnti,
rrc_gNB_ue_context_t *ue_context_pP,
const uint8_t xid)
{
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
LOG_I(NR_RRC,
"[RAPROC] UE %04x Logical Channel UL-DCCH, processing NR_RRCReestablishmentComplete from UE (SRB1 Active)\n",
ue_p->rnti);
int i = 0;
uint8_t new_xid = rrc_gNB_get_next_transaction_identifier(ctxt_pP->module_id);
ue_p->xids[new_xid] = RRC_REESTABLISH_COMPLETE;
ue_p->StatusRrc = NR_RRC_CONNECTED;
ue_p->ue_rrc_inactivity_timer = 1; // set rrc inactivity when UE goes into RRC_CONNECTED
RRCReestablishmentComplete_fill_SRB2_configList(ctxt_pP, ue_context_pP, xid, new_xid);
RRCReestablishmentComplete_fill_DRB_configList(ctxt_pP, ue_context_pP, new_xid);
RRCReestablishmentComplete_update_ngu_tunnel(ctxt_pP, ue_context_pP, reestablish_rnti);
RRCReestablishmentComplete_nas_pdu_update(ue_context_pP, xid);
/* Update RNTI in ue_context */
LOG_I(NR_RRC, "RRC Reestablishment - Updating UEid from %04x to %lx\n", ue_p->rnti, ctxt_pP->rntiMaybeUEid);
rrc_gNB_update_ue_context_rnti(ctxt_pP->rntiMaybeUEid, RC.nrrrc[ctxt_pP->module_id], ue_p->gNB_ue_ngap_id);
gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
NR_CellGroupConfig_t *cellGroupConfig = calloc(1, sizeof(NR_CellGroupConfig_t));
// Revert spCellConfig stored in spCellConfigReestablishment before had been dropped during RRC Reestablishment
ue_p->masterCellGroup->spCellConfig = ue_p->spCellConfigReestablishment;
ue_p->spCellConfigReestablishment = NULL;
cellGroupConfig->spCellConfig = ue_p->masterCellGroup->spCellConfig;
cellGroupConfig->mac_CellGroupConfig = ue_p->masterCellGroup->mac_CellGroupConfig;
cellGroupConfig->physicalCellGroupConfig = ue_p->masterCellGroup->physicalCellGroupConfig;
cellGroupConfig->rlc_BearerToReleaseList = NULL;
cellGroupConfig->rlc_BearerToAddModList = calloc(1, sizeof(*cellGroupConfig->rlc_BearerToAddModList));
/*
* Get SRB2, DRB configuration from the existing UE context,
* also start from SRB2 (i=1) and not from SRB1 (i=0).
*/
for (i = 1; i < ue_p->masterCellGroup->rlc_BearerToAddModList->list.count; ++i)
asn1cSeqAdd(&cellGroupConfig->rlc_BearerToAddModList->list, ue_p->masterCellGroup->rlc_BearerToAddModList->list.array[i]);
for (i = 0; i < cellGroupConfig->rlc_BearerToAddModList->list.count; i++) {
cellGroupConfig->rlc_BearerToAddModList->list.array[i]->reestablishRLC =
CALLOC(1, sizeof(*cellGroupConfig->rlc_BearerToAddModList->list.array[i]->reestablishRLC));
*cellGroupConfig->rlc_BearerToAddModList->list.array[i]->reestablishRLC = NR_RLC_BearerConfig__reestablishRLC_true;
}
uint8_t buffer[RRC_BUF_SIZE] = {0};
int size = do_RRCReconfiguration(ctxt_pP,
buffer,
RRC_BUF_SIZE,
new_xid,
ue_p->SRB_configList2[new_xid],
ue_p->DRB_configList2[new_xid],
NULL,
NULL,
NULL,
NULL, // MeasObj_list,
NULL,
ue_context_pP,
&rrc->carrier,
NULL,
NULL,
cellGroupConfig);
LOG_DUMPMSG(NR_RRC, DEBUG_RRC, (char *)buffer, size, "[MSG] RRC Reconfiguration\n");
RRCReestablishmentComplete_nas_pdu_free(ue_context_pP);
if (size < 0) {
LOG_E(NR_RRC, "RRC decode err!!! do_RRCReconfiguration\n");
return;
} else {
LOG_I(NR_RRC,
"[gNB %d] Frame %d, Logical Channel DL-DCCH, Generate NR_RRCReconfiguration (bytes %d, UE id %04x)\n",
ctxt_pP->module_id,
ctxt_pP->frame,
size,
ue_p->rnti);
LOG_D(NR_RRC,
"[FRAME %05d][RRC_gNB][MOD %u][][--- PDCP_DATA_REQ/%d Bytes (RRCReconfiguration to UE %04x MUI %d) --->][PDCP][MOD "
"%u][RB %u]\n",
ctxt_pP->frame,
ctxt_pP->module_id,
size,
ue_p->rnti,
rrc_gNB_mui,
ctxt_pP->module_id,
DCCH);
nr_rrc_mac_update_cellgroup(ue_context_pP->ue_context.rnti, cellGroupConfig);
nr_pdcp_data_req_srb(ctxt_pP->rntiMaybeUEid, DCCH, rrc_gNB_mui++, size, buffer, deliver_pdu_srb_f1, rrc);
}
if (NODE_IS_DU(RC.nrrrc[ctxt_pP->module_id]->node_type) || NODE_IS_MONOLITHIC(RC.nrrrc[ctxt_pP->module_id]->node_type)) {
uint32_t delay_ms = ue_p->masterCellGroup && ue_p->masterCellGroup->spCellConfig
&& ue_p->masterCellGroup->spCellConfig->spCellConfigDedicated
&& ue_p->masterCellGroup->spCellConfig->spCellConfigDedicated->downlinkBWP_ToAddModList
? NR_RRC_RECONFIGURATION_DELAY_MS + NR_RRC_BWP_SWITCHING_DELAY_MS
: NR_RRC_RECONFIGURATION_DELAY_MS;
nr_mac_enable_ue_rrc_processing_timer(ctxt_pP->module_id,
ue_p->rnti,
*RC.nrrrc[ctxt_pP->module_id]->carrier.servingcellconfigcommon->ssbSubcarrierSpacing,
delay_ms);
}
}
//-----------------------------------------------------------------------------
int nr_rrc_reconfiguration_req(rrc_gNB_ue_context_t *const ue_context_pP,
protocol_ctxt_t *const ctxt_pP,
const int dl_bwp_id,
const int ul_bwp_id) {
uint8_t xid = rrc_gNB_get_next_transaction_identifier(ctxt_pP->module_id);
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
NR_CellGroupConfig_t *masterCellGroup = ue_p->masterCellGroup;
if (dl_bwp_id > 0) {
*masterCellGroup->spCellConfig->spCellConfigDedicated->firstActiveDownlinkBWP_Id = dl_bwp_id;
*masterCellGroup->spCellConfig->spCellConfigDedicated->defaultDownlinkBWP_Id = dl_bwp_id;
}
if (ul_bwp_id > 0) {
*masterCellGroup->spCellConfig->spCellConfigDedicated->uplinkConfig->firstActiveUplinkBWP_Id = ul_bwp_id;
}
uint8_t buffer[RRC_BUF_SIZE];
int size = do_RRCReconfiguration(ctxt_pP,
buffer,
RRC_BUF_SIZE,
xid,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
ue_context_pP,
NULL,
NULL,
NULL,
masterCellGroup);
nr_rrc_mac_update_cellgroup(ue_context_pP->ue_context.rnti, masterCellGroup);
gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
nr_pdcp_data_req_srb(ctxt_pP->rntiMaybeUEid, DCCH, rrc_gNB_mui++, size, buffer, deliver_pdu_srb_f1, rrc);
if (NODE_IS_DU(rrc->node_type) || NODE_IS_MONOLITHIC(rrc->node_type)) {
uint32_t delay_ms = ue_p->masterCellGroup && ue_p->masterCellGroup->spCellConfig && ue_p->masterCellGroup->spCellConfig->spCellConfigDedicated
&& ue_p->masterCellGroup->spCellConfig->spCellConfigDedicated->downlinkBWP_ToAddModList
? NR_RRC_RECONFIGURATION_DELAY_MS + NR_RRC_BWP_SWITCHING_DELAY_MS
: NR_RRC_RECONFIGURATION_DELAY_MS;
nr_mac_enable_ue_rrc_processing_timer(ctxt_pP->module_id, ue_p->rnti, *rrc->carrier.servingcellconfigcommon->ssbSubcarrierSpacing, delay_ms);
}
return 0;
}
/*------------------------------------------------------------------------------*/
static int nr_rrc_gNB_decode_ccch(module_id_t module_id, rnti_t rnti, const uint8_t *buffer, int buffer_length, const uint8_t *du_to_cu_rrc_container, int du_to_cu_rrc_container_len)
{
module_id_t Idx;
asn_dec_rval_t dec_rval;
NR_UL_CCCH_Message_t *ul_ccch_msg = NULL;
gNB_RRC_INST *gnb_rrc_inst = RC.nrrrc[module_id];
NR_RRCSetupRequest_IEs_t *rrcSetupRequest = NULL;
NR_RRCReestablishmentRequest_IEs_t rrcReestablishmentRequest;
LOG_I(NR_RRC, "Decoding CCCH: RNTI %04x, payload_size %d\n", rnti, buffer_length);
dec_rval = uper_decode(NULL, &asn_DEF_NR_UL_CCCH_Message, (void **) &ul_ccch_msg, buffer, buffer_length, 0, 0);
if (dec_rval.code != RC_OK || dec_rval.consumed == 0) {
LOG_E(NR_RRC, " FATAL Error in receiving CCCH\n");
return -1;
}
if (ul_ccch_msg->message.present == NR_UL_CCCH_MessageType_PR_c1) {
switch (ul_ccch_msg->message.choice.c1->present) {
case NR_UL_CCCH_MessageType__c1_PR_NOTHING:
/* TODO */
LOG_I(NR_RRC, "Received PR_NOTHING on UL-CCCH-Message\n");
break;
case NR_UL_CCCH_MessageType__c1_PR_rrcSetupRequest:
LOG_D(NR_RRC, "Received RRCSetupRequest on UL-CCCH-Message (UE rnti %04x)\n", rnti);
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_get_ue_context_by_rnti(gnb_rrc_inst, rnti);
if (ue_context_p != NULL) {
LOG_W(NR_RRC, "Got RRC setup request for a already registered RNTI %x, dropping the old one and give up this rrcSetupRequest\n", ue_context_p->ue_context.rnti);
rrc_gNB_remove_ue_context(gnb_rrc_inst, ue_context_p);
} else {
rrcSetupRequest = &ul_ccch_msg->message.choice.c1->choice.rrcSetupRequest->rrcSetupRequest;
if (NR_InitialUE_Identity_PR_randomValue == rrcSetupRequest->ue_Identity.present) {
/* randomValue BIT STRING (SIZE (39)) */
if (rrcSetupRequest->ue_Identity.choice.randomValue.size != 5) { // 39-bit random value
LOG_E(NR_RRC, "wrong InitialUE-Identity randomValue size, expected 5, provided %lu", (long unsigned int)rrcSetupRequest->ue_Identity.choice.randomValue.size);
return -1;
}
uint64_t random_value = 0;
memcpy(((uint8_t *)&random_value) + 3, rrcSetupRequest->ue_Identity.choice.randomValue.buf, rrcSetupRequest->ue_Identity.choice.randomValue.size);
/* if there is already a registered UE (with another RNTI) with this random_value,
* the current one must be removed from MAC/PHY (zombie UE)
*/
if ((ue_context_p = rrc_gNB_ue_context_random_exist(gnb_rrc_inst, random_value))) {
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
LOG_W(NR_RRC, "new UE rnti (coming with random value) is already there, removing UE %x from MAC/PHY\n", rnti);
UE->ul_failure_timer = 20000;
}
ue_context_p = rrc_gNB_create_ue_context(rnti, gnb_rrc_inst, random_value);
} else if (NR_InitialUE_Identity_PR_ng_5G_S_TMSI_Part1 == rrcSetupRequest->ue_Identity.present) {
/* TODO */
/* <5G-S-TMSI> = <AMF Set ID><AMF Pointer><5G-TMSI> 48-bit */
/* ng-5G-S-TMSI-Part1 BIT STRING (SIZE (39)) */
if (rrcSetupRequest->ue_Identity.choice.ng_5G_S_TMSI_Part1.size != 5) {
LOG_E(NR_RRC, "wrong ng_5G_S_TMSI_Part1 size, expected 5, provided %lu \n", (long unsigned int)rrcSetupRequest->ue_Identity.choice.ng_5G_S_TMSI_Part1.size);
return -1;
}
uint64_t s_tmsi_part1 = bitStr_to_uint64(&rrcSetupRequest->ue_Identity.choice.ng_5G_S_TMSI_Part1);
// memcpy(((uint8_t *) & random_value) + 3,
// rrcSetupRequest->ue_Identity.choice.ng_5G_S_TMSI_Part1.buf,
// rrcSetupRequest->ue_Identity.choice.ng_5G_S_TMSI_Part1.size);
if ((ue_context_p = rrc_gNB_ue_context_5g_s_tmsi_exist(gnb_rrc_inst, s_tmsi_part1))) {
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
LOG_I(NR_RRC, " 5G-S-TMSI-Part1 exists, old rnti %04x => %04x\n", UE->rnti, rnti);
// TODO: MAC structures should not be accessed directly from the RRC! An implementation using the F1 interface should be developed.
if (!NODE_IS_CU(RC.nrrrc[0]->node_type)) {
nr_rrc_mac_remove_ue(ue_context_p->ue_context.rnti);
}
/* replace rnti in the context */
UE->rnti = rnti;
/* reset timers */
UE->ul_failure_timer = 0;
UE->ue_release_timer = 0;
UE->ue_reestablishment_timer = 0;
UE->ue_release_timer_s1 = 0;
UE->ue_release_timer_rrc = 0;
} else {
LOG_I(NR_RRC, "UE %04x 5G-S-TMSI-Part1 doesn't exist, setting ng_5G_S_TMSI_Part1 => %ld\n", rnti, s_tmsi_part1);
ue_context_p = rrc_gNB_create_ue_context(rnti, gnb_rrc_inst, s_tmsi_part1);
if (ue_context_p == NULL) {
LOG_E(NR_RRC, "rrc_gNB_get_next_free_ue_context returned NULL\n");
return -1;
}
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
UE->Initialue_identity_5g_s_TMSI.presence = true;
UE->ng_5G_S_TMSI_Part1 = s_tmsi_part1;
}
} else {
/* TODO */
uint64_t random_value = 0;
memcpy(((uint8_t *)&random_value) + 3, rrcSetupRequest->ue_Identity.choice.randomValue.buf, rrcSetupRequest->ue_Identity.choice.randomValue.size);
ue_context_p = rrc_gNB_create_ue_context(rnti, gnb_rrc_inst, random_value);
LOG_E(NR_RRC, "RRCSetupRequest without random UE identity or S-TMSI not supported, let's reject the UE %04x\n", rnti);
rrc_gNB_generate_RRCReject(module_id, ue_context_p);
break;
}
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
UE = &ue_context_p->ue_context;
UE->establishment_cause = rrcSetupRequest->establishmentCause;
rrc_gNB_generate_RRCSetup(module_id,
rnti,
rrc_gNB_get_ue_context_by_rnti(gnb_rrc_inst, rnti),
du_to_cu_rrc_container,
du_to_cu_rrc_container_len);
}
break;
case NR_UL_CCCH_MessageType__c1_PR_rrcResumeRequest:
LOG_I(NR_RRC, "receive rrcResumeRequest message \n");
break;
case NR_UL_CCCH_MessageType__c1_PR_rrcReestablishmentRequest: {
LOG_DUMPMSG(NR_RRC, DEBUG_RRC, (char *)(buffer), buffer_length, "[MSG] RRC Reestablishment Request\n");
rrcReestablishmentRequest = ul_ccch_msg->message.choice.c1->choice.rrcReestablishmentRequest->rrcReestablishmentRequest;
const NR_ReestablishmentCause_t cause = rrcReestablishmentRequest.reestablishmentCause;
const long physCellId = rrcReestablishmentRequest.ue_Identity.physCellId;
LOG_I(NR_RRC,
"UE %04x NR_RRCReestablishmentRequest cause %s\n",
rnti,
((cause == NR_ReestablishmentCause_otherFailure) ? "Other Failure"
: (cause == NR_ReestablishmentCause_handoverFailure) ? "Handover Failure"
: "reconfigurationFailure"));
uint8_t xid = -1;
if (physCellId != gnb_rrc_inst->carrier.physCellId) {
/* UE was moving from previous cell so quickly that RRCReestablishment for previous cell was received in this cell */
LOG_E(NR_RRC,
" NR_RRCReestablishmentRequest ue_Identity.physCellId(%ld) is not equal to current physCellId(%d), fallback to RRC establishment\n",
physCellId,
gnb_rrc_inst->carrier.physCellId);
xid = rrc_gNB_generate_RRCSetup_for_RRCReestablishmentRequest(module_id, rnti, 0);
break;
}
LOG_I(NR_RRC, "physCellId: %ld\n", physCellId);
for (int i = 0; i < rrcReestablishmentRequest.ue_Identity.shortMAC_I.size; i++) {
LOG_D(NR_RRC, "rrcReestablishmentRequest.ue_Identity.shortMAC_I.buf[%d] = %x\n", i, rrcReestablishmentRequest.ue_Identity.shortMAC_I.buf[i]);
}
// 3GPP TS 38.321 version 15.13.0 Section 7.1 Table 7.1-1: RNTI values
if (rrcReestablishmentRequest.ue_Identity.c_RNTI < 0x1 || rrcReestablishmentRequest.ue_Identity.c_RNTI > 0xffef) {
/* c_RNTI range error should not happen */
LOG_E(NR_RRC, "NR_RRCReestablishmentRequest c_RNTI range error, fallback to RRC establishment\n");
xid = rrc_gNB_generate_RRCSetup_for_RRCReestablishmentRequest(module_id, rnti, 0);
break;
}
rnti_t c_rnti = rrcReestablishmentRequest.ue_Identity.c_RNTI;
LOG_I(NR_RRC, "c_RNTI: %04x\n", c_rnti);
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_get_ue_context_by_rnti(gnb_rrc_inst, c_rnti);
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
if (ue_context_p == NULL) {
LOG_E(NR_RRC, "NR_RRCReestablishmentRequest without UE context, fallback to RRC establishment\n");
xid = rrc_gNB_generate_RRCSetup_for_RRCReestablishmentRequest(module_id, c_rnti, 0);
break;
}
// c-plane not end
if ((UE->StatusRrc != NR_RRC_RECONFIGURED) && (UE->reestablishment_cause == NR_ReestablishmentCause_spare1)) {
LOG_E(NR_RRC, "NR_RRCReestablishmentRequest (UE %x c-plane is not end), RRC establishment failed\n", c_rnti);
/* TODO RRC Release ? */
break;
}
if (UE->ue_reestablishment_timer > 0) {
LOG_E(NR_RRC, "RRRCReconfigurationComplete(Previous) don't receive, delete the Previous UE,\nprevious Status %d, new Status NR_RRC_RECONFIGURED\n", UE->StatusRrc);
UE->StatusRrc = NR_RRC_RECONFIGURED;
protocol_ctxt_t ctxt_old_p;
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt_old_p, module_id, GNB_FLAG_YES, c_rnti, 0, 0);
rrc_gNB_process_RRCReconfigurationComplete(&ctxt_old_p, ue_context_p, xid);
for (uint8_t pdusessionid = 0; pdusessionid < UE->nb_of_pdusessions; pdusessionid++) {
if (UE->pduSession[pdusessionid].status == PDU_SESSION_STATUS_DONE) {
UE->pduSession[pdusessionid].status = PDU_SESSION_STATUS_ESTABLISHED;
} else {
UE->pduSession[pdusessionid].status = PDU_SESSION_STATUS_FAILED;
}
}
}
/* reset timers */
UE->ul_failure_timer = 0;
UE->ue_release_timer = 0;
UE->ue_reestablishment_timer = 0;
// UE->ue_release_timer_s1 = 0;
UE->ue_release_timer_rrc = 0;
// Insert C-RNTI to map
for (int i = 0; i < MAX_MOBILES_PER_GNB; i++) {
nr_reestablish_rnti_map_t *nr_reestablish_rnti_map = &gnb_rrc_inst->nr_reestablish_rnti_map[i];
LOG_I(NR_RRC, "Insert nr_reestablish_rnti_map[%d] UEid: %lx, RNTI: %04x\n", i, nr_reestablish_rnti_map->ue_id, nr_reestablish_rnti_map->c_rnti);
if (nr_reestablish_rnti_map->ue_id == 0) {
nr_reestablish_rnti_map->ue_id = rnti;
nr_reestablish_rnti_map->c_rnti = c_rnti;
LOG_W(NR_RRC, "Insert nr_reestablish_rnti_map[%d] UEid: %lx, RNTI: %04x bug in UEid to fix \n", i, nr_reestablish_rnti_map->ue_id, nr_reestablish_rnti_map->c_rnti);
break;
}
}
UE->reestablishment_cause = cause;
LOG_D(NR_RRC, "Accept RRCReestablishmentRequest from UE physCellId %ld cause %ld\n", physCellId, cause);
UE->primaryCC_id = 0;
// LG COMMENT Idx = (ue_mod_idP * NB_RB_MAX) + DCCH;
Idx = DCCH;
// SRB1
UE->Srb[1].Active = 1;
// SRB2: set it to go through SRB1 with id 1 (DCCH)
UE->Srb[2].Active = 1;
protocol_ctxt_t ctxt = {.rntiMaybeUEid = rnti, .module_id = module_id, .instance = module_id, .enb_flag = 1, .eNB_index = module_id};
rrc_gNB_generate_RRCReestablishment(&ctxt, ue_context_p, du_to_cu_rrc_container, gnb_rrc_inst->carrier.servingcellconfigcommon, 0);
LOG_I(NR_RRC, "CALLING RLC CONFIG SRB1 (rbid %d)\n", Idx);
} break;
case NR_UL_CCCH_MessageType__c1_PR_rrcSystemInfoRequest:
LOG_I(NR_RRC, "UE %04x receive rrcSystemInfoRequest message \n", rnti);
/* TODO */
break;
default:
LOG_E(NR_RRC, "UE %04x Unknown message\n", rnti);
break;
}
}
return 0;
}
/*! \fn uint64_t bitStr_to_uint64(BIT_STRING_t *)
*\brief This function extract at most a 64 bits value from a BIT_STRING_t object, the exact bits number depend on the BIT_STRING_t contents.
*\param[in] pointer to the BIT_STRING_t object.
*\return the extracted value.
*/
static inline uint64_t bitStr_to_uint64(BIT_STRING_t *asn) {
uint64_t result = 0;
int index;
int shift;
DevCheck ((asn->size > 0) && (asn->size <= 8), asn->size, 0, 0);
shift = ((asn->size - 1) * 8) - asn->bits_unused;
for (index = 0; index < (asn->size - 1); index++) {
result |= (uint64_t)asn->buf[index] << shift;
shift -= 8;
}
result |= asn->buf[index] >> asn->bits_unused;
return result;
}
static void rrc_gNB_process_MeasurementReport(rrc_gNB_ue_context_t *ue_context, const NR_MeasurementReport_t *measurementReport)
{
if (LOG_DEBUGFLAG(DEBUG_ASN1))
xer_fprint(stdout, &asn_DEF_NR_MeasurementReport, (void *)measurementReport);
DevAssert(measurementReport->criticalExtensions.present == NR_MeasurementReport__criticalExtensions_PR_measurementReport
&& measurementReport->criticalExtensions.choice.measurementReport != NULL);
gNB_RRC_UE_t *ue_ctxt = &ue_context->ue_context;
if (ue_ctxt->measResults != NULL) {
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_NR_MeasResults, ue_ctxt->measResults);
ue_ctxt->measResults = NULL;
}
const NR_MeasId_t id = measurementReport->criticalExtensions.choice.measurementReport->measResults.measId;
AssertFatal(id, "unexpected MeasResult for MeasurementId %ld received\n", id);
asn1cCallocOne(ue_ctxt->measResults, measurementReport->criticalExtensions.choice.measurementReport->measResults);
}
static int handle_rrcReestablishmentComplete(const protocol_ctxt_t *const ctxt_pP,
const NR_RRCReestablishmentComplete_t *reestablishment_complete)
{
rnti_t reestablish_rnti = 0;
gNB_RRC_INST *gnb_rrc_inst = RC.nrrrc[ctxt_pP->module_id];
rrc_gNB_ue_context_t *ue_context_p = NULL;
gNB_RRC_UE_t *UE = NULL;
// Select C-RNTI from map
for (int i = 0; i < MAX_MOBILES_PER_GNB; i++) {
nr_reestablish_rnti_map_t *nr_reestablish_rnti_map = &gnb_rrc_inst->nr_reestablish_rnti_map[i];
LOG_I(NR_RRC,
"nr_reestablish_rnti_map[%d] UEid %lx, RNTI %04x, ctxt_pP->rntiMaybeUEid: %lx\n",
i,
nr_reestablish_rnti_map->ue_id,
nr_reestablish_rnti_map->c_rnti,
ctxt_pP->rntiMaybeUEid);
if (nr_reestablish_rnti_map->ue_id == ctxt_pP->rntiMaybeUEid) {
LOG_I(NR_RRC,
"Removing nr_reestablish_rnti_map[%d] UEid %lx, RNTI %04x\n",
i,
nr_reestablish_rnti_map->ue_id,
nr_reestablish_rnti_map->c_rnti);
reestablish_rnti = nr_reestablish_rnti_map->c_rnti;
ue_context_p = rrc_gNB_get_ue_context_by_rnti(gnb_rrc_inst, reestablish_rnti);
UE = &ue_context_p->ue_context;
break;
}
}
if (ue_context_p == NULL || UE == NULL) {
LOG_E(RRC, "no UE found for reestablishment. ERROR: should send reply\n");
return -1;
}
DevAssert(reestablishment_complete->criticalExtensions.present
== NR_RRCReestablishmentComplete__criticalExtensions_PR_rrcReestablishmentComplete);
rrc_gNB_process_RRCReestablishmentComplete(ctxt_pP,
reestablish_rnti,
ue_context_p,
reestablishment_complete->rrc_TransactionIdentifier);
nr_rrc_mac_remove_ue(reestablish_rnti);
UE->ue_reestablishment_counter++;
// UE->ue_release_timer = 0;
UE->ue_reestablishment_timer = 1;
// remove UE after 100 frames after NR_RRCReestablishmentRelease is triggered
UE->ue_reestablishment_timer_thres = 1000;
return 0;
}
static int handle_ueCapabilityInformation(const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *ue_context_p,
const NR_UECapabilityInformation_t *ue_cap_info)
{
AssertFatal(ue_context_p != NULL, "Processing %s() for UE %lx, ue_context_p is NULL\n", __func__, ctxt_pP->rntiMaybeUEid);
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
LOG_I(NR_RRC, "got UE capabilities for UE %lx\n", ctxt_pP->rntiMaybeUEid);
int eutra_index = -1;
if (ue_cap_info->criticalExtensions.present == NR_UECapabilityInformation__criticalExtensions_PR_ueCapabilityInformation) {
const NR_UE_CapabilityRAT_ContainerList_t *ue_CapabilityRAT_ContainerList =
ue_cap_info->criticalExtensions.choice.ueCapabilityInformation->ue_CapabilityRAT_ContainerList;
for (int i = 0; i < ue_CapabilityRAT_ContainerList->list.count; i++) {
const NR_UE_CapabilityRAT_Container_t *ue_cap_container = ue_CapabilityRAT_ContainerList->list.array[i];
if (ue_cap_container->rat_Type == NR_RAT_Type_nr) {
if (UE->UE_Capability_nr) {
ASN_STRUCT_FREE(asn_DEF_NR_UE_NR_Capability, UE->UE_Capability_nr);
UE->UE_Capability_nr = 0;
}
asn_dec_rval_t dec_rval = uper_decode(NULL,
&asn_DEF_NR_UE_NR_Capability,
(void **)&UE->UE_Capability_nr,
ue_cap_container->ue_CapabilityRAT_Container.buf,
ue_cap_container->ue_CapabilityRAT_Container.size,
0,
0);
if (LOG_DEBUGFLAG(DEBUG_ASN1)) {
xer_fprint(stdout, &asn_DEF_NR_UE_NR_Capability, UE->UE_Capability_nr);
}
if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) {
LOG_E(NR_RRC,
PROTOCOL_NR_RRC_CTXT_UE_FMT " Failed to decode nr UE capabilities (%zu bytes)\n",
PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP),
dec_rval.consumed);
ASN_STRUCT_FREE(asn_DEF_NR_UE_NR_Capability, UE->UE_Capability_nr);
UE->UE_Capability_nr = 0;
}
UE->UE_Capability_size = ue_cap_container->ue_CapabilityRAT_Container.size;
if (eutra_index != -1) {
LOG_E(NR_RRC, "fatal: more than 1 eutra capability\n");
exit(1);
}
eutra_index = i;
}
if (ue_cap_container->rat_Type == NR_RAT_Type_eutra_nr) {
if (UE->UE_Capability_MRDC) {
ASN_STRUCT_FREE(asn_DEF_NR_UE_MRDC_Capability, UE->UE_Capability_MRDC);
UE->UE_Capability_MRDC = 0;
}
asn_dec_rval_t dec_rval = uper_decode(NULL,
&asn_DEF_NR_UE_MRDC_Capability,
(void **)&UE->UE_Capability_MRDC,
ue_cap_container->ue_CapabilityRAT_Container.buf,
ue_cap_container->ue_CapabilityRAT_Container.size,
0,
0);
if (LOG_DEBUGFLAG(DEBUG_ASN1)) {
xer_fprint(stdout, &asn_DEF_NR_UE_MRDC_Capability, UE->UE_Capability_MRDC);
}
if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) {
LOG_E(NR_RRC,
PROTOCOL_NR_RRC_CTXT_FMT " Failed to decode nr UE capabilities (%zu bytes)\n",
PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP),
dec_rval.consumed);
ASN_STRUCT_FREE(asn_DEF_NR_UE_MRDC_Capability, UE->UE_Capability_MRDC);
UE->UE_Capability_MRDC = 0;
}
UE->UE_MRDC_Capability_size = ue_cap_container->ue_CapabilityRAT_Container.size;
}
if (ue_cap_container->rat_Type == NR_RAT_Type_eutra) {
// TODO
}
}
if (eutra_index == -1)
return -1;
}
if (get_softmodem_params()->sa) {
rrc_gNB_send_NGAP_UE_CAPABILITIES_IND(ctxt_pP, ue_context_p, ue_cap_info);
}
// we send the UE capabilities request before RRC connection is complete,
// so we cannot have a PDU session yet
AssertFatal(UE->nb_of_pdusessions == 0, "logic bug: received capabilities while PDU session established\n");
// TODO: send UE context modification response with UE capabilities to
// allow DU configure CellGroupConfig
rrc_gNB_generate_defaultRRCReconfiguration(ctxt_pP, ue_context_p);
return 0;
}
static int handle_rrcSetupComplete(const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *ue_context_p,
const NR_RRCSetupComplete_t *setup_complete)
{
if (!ue_context_p) {
LOG_I(NR_RRC, "Processing NR_RRCSetupComplete UE %lx, ue_context_p is NULL\n", ctxt_pP->rntiMaybeUEid);
return -1;
}
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
NR_RRCSetupComplete_IEs_t *setup_complete_ies = setup_complete->criticalExtensions.choice.rrcSetupComplete;
if (setup_complete_ies->ng_5G_S_TMSI_Value != NULL) {
if (setup_complete_ies->ng_5G_S_TMSI_Value->present == NR_RRCSetupComplete_IEs__ng_5G_S_TMSI_Value_PR_ng_5G_S_TMSI_Part2) {
if (setup_complete_ies->ng_5G_S_TMSI_Value->choice.ng_5G_S_TMSI_Part2.size != 2) {
LOG_E(NR_RRC,
"wrong ng_5G_S_TMSI_Part2 size, expected 2, provided %lu",
(long unsigned int)
setup_complete->criticalExtensions.choice.rrcSetupComplete->ng_5G_S_TMSI_Value->choice.ng_5G_S_TMSI_Part2.size);
return -1;
}
if (UE->ng_5G_S_TMSI_Part1 != 0) {
UE->ng_5G_S_TMSI_Part2 = BIT_STRING_to_uint16(&setup_complete_ies->ng_5G_S_TMSI_Value->choice.ng_5G_S_TMSI_Part2);
}
/* TODO */
} else if (setup_complete_ies->ng_5G_S_TMSI_Value->present == NR_RRCSetupComplete_IEs__ng_5G_S_TMSI_Value_PR_ng_5G_S_TMSI) {
if (setup_complete_ies->ng_5G_S_TMSI_Value->choice.ng_5G_S_TMSI.size != 6) {
LOG_E(NR_RRC,
"wrong ng_5G_S_TMSI size, expected 6, provided %lu",
(long unsigned int)setup_complete_ies->ng_5G_S_TMSI_Value->choice.ng_5G_S_TMSI.size);
return -1;
}
uint64_t fiveg_s_TMSI = bitStr_to_uint64(&setup_complete_ies->ng_5G_S_TMSI_Value->choice.ng_5G_S_TMSI);
LOG_I(NR_RRC,
"Received rrcSetupComplete, 5g_s_TMSI: 0x%lX, amf_set_id: 0x%lX(%ld), amf_pointer: 0x%lX(%ld), 5g TMSI: 0x%X \n",
fiveg_s_TMSI,
fiveg_s_TMSI >> 38,
fiveg_s_TMSI >> 38,
(fiveg_s_TMSI >> 32) & 0x3F,
(fiveg_s_TMSI >> 32) & 0x3F,
(uint32_t)fiveg_s_TMSI);
if (UE->Initialue_identity_5g_s_TMSI.presence) {
UE->Initialue_identity_5g_s_TMSI.amf_set_id = fiveg_s_TMSI >> 38;
UE->Initialue_identity_5g_s_TMSI.amf_pointer = (fiveg_s_TMSI >> 32) & 0x3F;
UE->Initialue_identity_5g_s_TMSI.fiveg_tmsi = (uint32_t)fiveg_s_TMSI;
}
}
}
rrc_gNB_process_RRCSetupComplete(ctxt_pP, ue_context_p, setup_complete->criticalExtensions.choice.rrcSetupComplete);
LOG_I(NR_RRC, PROTOCOL_NR_RRC_CTXT_UE_FMT " UE State = NR_RRC_CONNECTED \n", PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP));
UE->ue_release_timer = 0;
return 0;
}
static void handle_rrcReconfigurationComplete(const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *ue_context_p,
const NR_RRCReconfigurationComplete_t *reconfig_complete)
{
LOG_I(NR_RRC, "Receive RRC Reconfiguration Complete message UE %lx\n", ctxt_pP->rntiMaybeUEid);
AssertFatal(ue_context_p != NULL, "Processing %s() for UE %lx, ue_context_p is NULL\n", __func__, ctxt_pP->rntiMaybeUEid);
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
uint8_t xid = reconfig_complete->rrc_TransactionIdentifier;
rrc_gNB_process_RRCReconfigurationComplete(ctxt_pP, ue_context_p, xid);
if (get_softmodem_params()->sa) {
switch (UE->xids[xid]) {
case RRC_PDUSESSION_RELEASE: {
gtpv1u_gnb_delete_tunnel_req_t req = {0};
gtpv1u_delete_ngu_tunnel(ctxt_pP->instance, &req);
// NGAP_PDUSESSION_RELEASE_RESPONSE
rrc_gNB_send_NGAP_PDUSESSION_RELEASE_RESPONSE(ctxt_pP, ue_context_p, xid);
} break;
case RRC_PDUSESSION_ESTABLISH:
if (UE->nb_of_pdusessions > 0)
rrc_gNB_send_NGAP_PDUSESSION_SETUP_RESP(ctxt_pP, ue_context_p, xid);
break;
case RRC_PDUSESSION_MODIFY:
rrc_gNB_send_NGAP_PDUSESSION_MODIFY_RESP(ctxt_pP, ue_context_p, xid);
break;
case RRC_FIRST_RECONF:
rrc_gNB_send_NGAP_INITIAL_CONTEXT_SETUP_RESP(ctxt_pP, ue_context_p);
break;
default:
LOG_E(RRC, "Received unexpected xid: %d\n", xid);
}
}
}
//-----------------------------------------------------------------------------
int rrc_gNB_decode_dcch(const protocol_ctxt_t *const ctxt_pP,
const rb_id_t Srb_id,
const uint8_t *const Rx_sdu,
const sdu_size_t sdu_sizeP)
//-----------------------------------------------------------------------------
{
gNB_RRC_INST *gnb_rrc_inst = RC.nrrrc[ctxt_pP->module_id];
if ((Srb_id != 1) && (Srb_id != 2)) {
LOG_E(NR_RRC, "Received message on SRB%ld, should not have ...\n", Srb_id);
} else {
LOG_D(NR_RRC, "Received message on SRB%ld\n", Srb_id);
}
LOG_D(NR_RRC, "Decoding UL-DCCH Message\n");
{
for (int i = 0; i < sdu_sizeP; i++) {
LOG_T(NR_RRC, "%x.", Rx_sdu[i]);
}
LOG_T(NR_RRC, "\n");
}
NR_UL_DCCH_Message_t *ul_dcch_msg = NULL;
asn_dec_rval_t dec_rval = uper_decode(NULL, &asn_DEF_NR_UL_DCCH_Message, (void **)&ul_dcch_msg, Rx_sdu, sdu_sizeP, 0, 0);
if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) {
LOG_E(NR_RRC, "Failed to decode UL-DCCH (%zu bytes)\n", dec_rval.consumed);
return -1;
}
if (LOG_DEBUGFLAG(DEBUG_ASN1)) {
xer_fprint(stdout, &asn_DEF_NR_UL_DCCH_Message, (void *)ul_dcch_msg);
}
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_get_ue_context_by_rnti(gnb_rrc_inst, ctxt_pP->rntiMaybeUEid);
if (ul_dcch_msg->message.present == NR_UL_DCCH_MessageType_PR_c1) {
switch (ul_dcch_msg->message.choice.c1->present) {
case NR_UL_DCCH_MessageType__c1_PR_NOTHING:
LOG_I(NR_RRC, "Received PR_NOTHING on UL-DCCH-Message\n");
break;
case NR_UL_DCCH_MessageType__c1_PR_rrcReconfigurationComplete:
handle_rrcReconfigurationComplete(ctxt_pP, ue_context_p, ul_dcch_msg->message.choice.c1->choice.rrcReconfigurationComplete);
break;
case NR_UL_DCCH_MessageType__c1_PR_rrcSetupComplete:
if (handle_rrcSetupComplete(ctxt_pP, ue_context_p, ul_dcch_msg->message.choice.c1->choice.rrcSetupComplete) == -1)
return -1;
break;
case NR_UL_DCCH_MessageType__c1_PR_measurementReport:
DevAssert(ul_dcch_msg != NULL
&& ul_dcch_msg->message.present == NR_UL_DCCH_MessageType_PR_c1
&& ul_dcch_msg->message.choice.c1
&& ul_dcch_msg->message.choice.c1->present == NR_UL_DCCH_MessageType__c1_PR_measurementReport);
rrc_gNB_process_MeasurementReport(ue_context_p, ul_dcch_msg->message.choice.c1->choice.measurementReport);
break;
case NR_UL_DCCH_MessageType__c1_PR_ulInformationTransfer:
LOG_I(NR_RRC, "Recived RRC GNB UL Information Transfer \n");
if (!ue_context_p) {
LOG_I(NR_RRC, "Processing ulInformationTransfer UE %lx, ue_context_p is NULL\n", ctxt_pP->rntiMaybeUEid);
break;
}
LOG_D(NR_RRC, "[MSG] RRC UL Information Transfer \n");
LOG_DUMPMSG(RRC, DEBUG_RRC, (char *)Rx_sdu, sdu_sizeP, "[MSG] RRC UL Information Transfer \n");
if (get_softmodem_params()->sa) {
rrc_gNB_send_NGAP_UPLINK_NAS(ctxt_pP, ue_context_p, ul_dcch_msg);
}
break;
case NR_UL_DCCH_MessageType__c1_PR_securityModeComplete:
// to avoid segmentation fault
if (!ue_context_p) {
LOG_I(NR_RRC, "Processing securityModeComplete UE %lx, ue_context_p is NULL\n", ctxt_pP->rntiMaybeUEid);
break;
}
LOG_I(NR_RRC,
PROTOCOL_NR_RRC_CTXT_UE_FMT " received securityModeComplete on UL-DCCH %d from UE\n",
PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP),
DCCH);
LOG_D(NR_RRC,
PROTOCOL_NR_RRC_CTXT_UE_FMT
" RLC RB %02d --- RLC_DATA_IND %d bytes "
"(securityModeComplete) ---> RRC_eNB\n",
PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP),
DCCH,
sdu_sizeP);
if (LOG_DEBUGFLAG(DEBUG_ASN1)) {
xer_fprint(stdout, &asn_DEF_NR_UL_DCCH_Message, (void *)ul_dcch_msg);
}
/* configure ciphering */
nr_rrc_pdcp_config_security(ctxt_pP, ue_context_p, 1);
rrc_gNB_generate_UECapabilityEnquiry(ctxt_pP, ue_context_p);
break;
case NR_UL_DCCH_MessageType__c1_PR_securityModeFailure:
LOG_DUMPMSG(NR_RRC, DEBUG_RRC, (char *)Rx_sdu, sdu_sizeP, "[MSG] NR RRC Security Mode Failure\n");
LOG_W(NR_RRC,
PROTOCOL_RRC_CTXT_UE_FMT
" RLC RB %02d --- RLC_DATA_IND %d bytes "
"(securityModeFailure) ---> RRC_gNB\n",
PROTOCOL_RRC_CTXT_UE_ARGS(ctxt_pP),
DCCH,
sdu_sizeP);
if (LOG_DEBUGFLAG(DEBUG_ASN1)) {
xer_fprint(stdout, &asn_DEF_NR_UL_DCCH_Message, (void *)ul_dcch_msg);
}
rrc_gNB_generate_UECapabilityEnquiry(ctxt_pP, ue_context_p);
break;
case NR_UL_DCCH_MessageType__c1_PR_ueCapabilityInformation:
if (handle_ueCapabilityInformation(ctxt_pP, ue_context_p, ul_dcch_msg->message.choice.c1->choice.ueCapabilityInformation)
== -1)
return -1;
break;
case NR_UL_DCCH_MessageType__c1_PR_rrcReestablishmentComplete:
if (handle_rrcReestablishmentComplete(ctxt_pP, ul_dcch_msg->message.choice.c1->choice.rrcReestablishmentComplete)
== -1)
return -1;
break;
default:
break;
}
}
return 0;
}
void rrc_gNB_process_f1_setup_req(f1ap_setup_req_t *f1_setup_req) {
LOG_I(NR_RRC,"Received F1 Setup Request from gNB_DU %llu (%s)\n",(unsigned long long int)f1_setup_req->gNB_DU_id,f1_setup_req->gNB_DU_name);
int cu_cell_ind = 0;
MessageDef *msg_p =itti_alloc_new_message (TASK_RRC_GNB, 0, F1AP_SETUP_RESP);
F1AP_SETUP_RESP (msg_p).num_cells_to_activate = 0;
MessageDef *msg_p2=itti_alloc_new_message (TASK_RRC_GNB, 0, F1AP_GNB_CU_CONFIGURATION_UPDATE);
for (int i = 0; i < f1_setup_req->num_cells_available; i++) {
for (int j=0; j<RC.nb_nr_inst; j++) {
gNB_RRC_INST *rrc = RC.nrrrc[j];
if (rrc->configuration.mcc[0] == f1_setup_req->cell[i].mcc &&
rrc->configuration.mnc[0] == f1_setup_req->cell[i].mnc &&
rrc->nr_cellid == f1_setup_req->cell[i].nr_cellid) {
//fixme: multi instance is not consistent here
F1AP_SETUP_RESP (msg_p).gNB_CU_name = rrc->node_name;
// check that CU rrc instance corresponds to mcc/mnc/cgi (normally cgi should be enough, but just in case)
LOG_W(NR_RRC, "instance %d sib1 length %d\n", i, f1_setup_req->sib1_length[i]);
AssertFatal(rrc->carrier.mib == NULL, "CU MIB is already initialized: double F1 setup request?\n");
asn_dec_rval_t dec_rval = uper_decode_complete(NULL,
&asn_DEF_NR_BCCH_BCH_Message,
(void **)&rrc->carrier.mib,
f1_setup_req->mib[i],
f1_setup_req->mib_length[i]);
AssertFatal(dec_rval.code == RC_OK,
"[gNB_CU %"PRIu8"] Failed to decode NR_BCCH_BCH_MESSAGE (%zu bits)\n",
j,
dec_rval.consumed );
dec_rval = uper_decode_complete(NULL,
&asn_DEF_NR_SIB1, //&asn_DEF_NR_BCCH_DL_SCH_Message,
(void **)&rrc->carrier.siblock1_DU,
f1_setup_req->sib1[i],
f1_setup_req->sib1_length[i]);
AssertFatal(dec_rval.code == RC_OK,
"[gNB_DU %"PRIu8"] Failed to decode NR_BCCH_DLSCH_MESSAGE (%zu bits)\n",
j,
dec_rval.consumed );
// Parse message and extract SystemInformationBlockType1 field
rrc->carrier.sib1 = rrc->carrier.siblock1_DU;
if ( LOG_DEBUGFLAG(DEBUG_ASN1)){
LOG_I(NR_RRC, "Printing received SIB1 container inside F1 setup request message:\n");
xer_fprint(stdout, &asn_DEF_NR_SIB1,(void *)rrc->carrier.sib1);
}
rrc->carrier.physCellId = f1_setup_req->cell[i].nr_pci;
F1AP_GNB_CU_CONFIGURATION_UPDATE (msg_p2).gNB_CU_name = rrc->node_name;
F1AP_GNB_CU_CONFIGURATION_UPDATE (msg_p2).cells_to_activate[cu_cell_ind].mcc = rrc->configuration.mcc[0];
F1AP_GNB_CU_CONFIGURATION_UPDATE (msg_p2).cells_to_activate[cu_cell_ind].mnc = rrc->configuration.mnc[0];
F1AP_GNB_CU_CONFIGURATION_UPDATE (msg_p2).cells_to_activate[cu_cell_ind].mnc_digit_length = rrc->configuration.mnc_digit_length[0];
F1AP_GNB_CU_CONFIGURATION_UPDATE (msg_p2).cells_to_activate[cu_cell_ind].nr_cellid = rrc->nr_cellid;
F1AP_GNB_CU_CONFIGURATION_UPDATE (msg_p2).cells_to_activate[cu_cell_ind].nrpci = f1_setup_req->cell[i].nr_pci;
int num_SI= 0;
if (rrc->carrier.SIB23) {
F1AP_GNB_CU_CONFIGURATION_UPDATE (msg_p2).cells_to_activate[cu_cell_ind].SI_container[2] = rrc->carrier.SIB23;
F1AP_GNB_CU_CONFIGURATION_UPDATE (msg_p2).cells_to_activate[cu_cell_ind].SI_container_length[2] = rrc->carrier.sizeof_SIB23;
num_SI++;
}
F1AP_GNB_CU_CONFIGURATION_UPDATE (msg_p2).cells_to_activate[cu_cell_ind].num_SI = num_SI;
cu_cell_ind++;
F1AP_GNB_CU_CONFIGURATION_UPDATE (msg_p2).num_cells_to_activate = cu_cell_ind;
// send
break;
} else {// setup_req mcc/mnc match rrc internal list element
LOG_W(NR_RRC,"[Inst %d] No matching MCC/MNC: rrc->mcc/f1_setup_req->mcc %d/%d rrc->mnc/f1_setup_req->mnc %d/%d rrc->nr_cellid/f1_setup_req->nr_cellid %ld/%ld \n",
j, rrc->configuration.mcc[0], f1_setup_req->cell[i].mcc,
rrc->configuration.mnc[0], f1_setup_req->cell[i].mnc,
rrc->nr_cellid, f1_setup_req->cell[i].nr_cellid);
}
}// for (int j=0;j<RC.nb_inst;j++)
if (cu_cell_ind == 0) {
AssertFatal(1 == 0, "No cell found\n");
} else {
// send ITTI message to F1AP-CU task
itti_send_msg_to_task (TASK_CU_F1, 0, msg_p);
itti_send_msg_to_task (TASK_CU_F1, 0, msg_p2);
}
// handle other failure cases
}//for (int i=0;i<f1_setup_req->num_cells_available;i++)
}
void rrc_gNB_process_initial_ul_rrc_message(const f1ap_initial_ul_rrc_message_t *ul_rrc)
{
// first get RRC instance (note, no the ITTI instance)
module_id_t i = 0;
for (i=0; i < RC.nb_nr_inst; i++) {
gNB_RRC_INST *rrc = RC.nrrrc[i];
if (rrc->nr_cellid == ul_rrc->nr_cellid)
break;
}
//AssertFatal(i != RC.nb_nr_inst, "Cell_id not found\n");
// TODO REMOVE_DU_RRC in monolithic mode, the MAC does not have the
// nr_cellid. Thus, the above check would fail. For the time being, just put
// a warning, as we handle one DU only anyway
if (i == RC.nb_nr_inst) {
i = 0;
LOG_W(RRC, "initial UL RRC message nr_cellid %ld does not match RRC's %ld\n", ul_rrc->nr_cellid, RC.nrrrc[0]->nr_cellid);
}
nr_rrc_gNB_decode_ccch(i, ul_rrc->crnti, ul_rrc->rrc_container, ul_rrc->rrc_container_length, ul_rrc->du2cu_rrc_container, ul_rrc->du2cu_rrc_container_length);
if (ul_rrc->rrc_container)
free(ul_rrc->rrc_container);
if (ul_rrc->du2cu_rrc_container)
free(ul_rrc->du2cu_rrc_container);
}
void rrc_gNB_process_release_request(const module_id_t gnb_mod_idP, x2ap_ENDC_sgnb_release_request_t *m)
{
gNB_RRC_INST *rrc = RC.nrrrc[gnb_mod_idP];
rrc_remove_nsa_user(rrc, m->rnti);
}
void rrc_gNB_process_dc_overall_timeout(const module_id_t gnb_mod_idP, x2ap_ENDC_dc_overall_timeout_t *m)
{
gNB_RRC_INST *rrc = RC.nrrrc[gnb_mod_idP];
rrc_remove_nsa_user(rrc, m->rnti);
}
static void rrc_DU_process_ue_context_modification_request(MessageDef *msg_p, instance_t instance)
{
f1ap_ue_context_setup_t * req=&F1AP_UE_CONTEXT_MODIFICATION_REQ(msg_p);
protocol_ctxt_t ctxt = {.rntiMaybeUEid = req->rnti, .module_id = instance, .instance = instance, .enb_flag = 1, .eNB_index = instance};
gNB_RRC_INST *rrc = RC.nrrrc[ctxt.module_id];
gNB_MAC_INST *mac = RC.nrmac[ctxt.module_id];
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_get_ue_context_by_rnti(rrc, req->rnti);
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
MessageDef *message_p;
message_p = itti_alloc_new_message (TASK_RRC_GNB, 0, F1AP_UE_CONTEXT_MODIFICATION_RESP);
f1ap_ue_context_setup_t * resp=&F1AP_UE_CONTEXT_MODIFICATION_RESP(message_p);
uint32_t incoming_teid = 0;
NR_CellGroupConfig_t *cellGroupConfig = NULL;
/* Configure SRB2 */
NR_SRB_ToAddMod_t *SRB2_config = NULL;
NR_SRB_ToAddModList_t *SRB_configList = NULL;
uint8_t SRBs_before_new_addition = 0;
if(req->srbs_to_be_setup_length>0){
if (UE->SRB_configList == NULL) {
LOG_W(NR_RRC, "The SRB list of the UE context is empty before the addition of new SRB at the DU \n");
UE->SRB_configList = CALLOC(1, sizeof(*UE->SRB_configList));
}
SRB_configList = UE->SRB_configList;
SRBs_before_new_addition = SRB_configList->list.count;
for (int i=0; i<req->srbs_to_be_setup_length; i++){
SRB2_config = CALLOC(1, sizeof(*SRB2_config));
SRB2_config->srb_Identity = req->srbs_to_be_setup[i].srb_id;
asn1cSeqAdd(&SRB_configList->list, SRB2_config);
}
}
/* Configure DRB */
NR_DRB_ToAddMod_t *DRB_config = NULL;
NR_DRB_ToAddModList_t *DRB_configList = NULL;
int drb_id_to_setup_start = 0;
long drb_priority[NGAP_MAX_DRBS_PER_UE];
if(req->drbs_to_be_setup_length>0){
if (UE->DRB_configList == NULL) {
UE->DRB_configList = CALLOC(1, sizeof(*UE->DRB_configList));
}
DRB_configList = UE->DRB_configList;
for (int i=0; i<req->drbs_to_be_setup_length; i++){
DRB_config = CALLOC(1, sizeof(*DRB_config));
DRB_config->drb_Identity = req->drbs_to_be_setup[i].drb_id;
if (drb_id_to_setup_start == 0) drb_id_to_setup_start = DRB_config->drb_Identity;
asn1cSeqAdd(&DRB_configList->list, DRB_config);
f1ap_drb_to_be_setup_t drb_p = req->drbs_to_be_setup[i];
transport_layer_addr_t addr;
memcpy(addr.buffer, &drb_p.up_ul_tnl[0].tl_address, sizeof(drb_p.up_ul_tnl[0].tl_address));
addr.length=sizeof(drb_p.up_ul_tnl[0].tl_address)*8;
extern instance_t DUuniqInstance;
if (!drb_id_to_setup_start) drb_id_to_setup_start = drb_p.drb_id;
incoming_teid = newGtpuCreateTunnel(DUuniqInstance,
req->rnti,
drb_p.drb_id,
drb_p.drb_id,
drb_p.up_ul_tnl[0].teid,
-1, // no qfi
addr,
drb_p.up_ul_tnl[0].port,
DURecvCb,
NULL);
/* TODO: hardcoded to 13 for the time being, to be changed? */
drb_priority[DRB_config->drb_Identity-1] = 13;
}
}
if(req->srbs_to_be_setup_length>0 || req->drbs_to_be_setup_length>0){
cellGroupConfig = calloc(1, sizeof(NR_CellGroupConfig_t));
fill_mastercellGroupConfig(cellGroupConfig,
UE->masterCellGroup,
rrc->um_on_default_drb,
drb_id_to_setup_start < 2 ? 1 : 0,
DRB_configList,
drb_priority);
apply_macrlc_config(rrc, ue_context_p, &ctxt);
}
if(req->ReconfigComplOutcome == RRCreconf_failure){
LOG_W(NR_RRC, "CU reporting RRC Reconfiguration failure \n");
}
else if(req->ReconfigComplOutcome == RRCreconf_success){
LOG_I(NR_RRC, "CU reporting RRC Reconfiguration success \n");
if (UE->DRB_configList != NULL) {
LOG_I(NR_RRC, "Send first DDD buffer status reporting towards the CU through an ITTI message to gtp-u \n");
uint8_t drb_id = UE->DRB_configList->list.array[0]->drb_Identity;
rnti_t rnti = UE->rnti;
int rlc_tx_buffer_space = nr_rlc_get_available_tx_space(rnti, drb_id + 3);
LOG_I(NR_RRC, "Reported in DDD drb_id:%d, rnti:%d\n", drb_id, rnti);
MessageDef *msg = itti_alloc_new_message_sized(TASK_RRC_GNB, 0, GTPV1U_DU_BUFFER_REPORT_REQ,
sizeof(gtpv1u_tunnel_data_req_t));
gtpv1u_DU_buffer_report_req_t *req=&GTPV1U_DU_BUFFER_REPORT_REQ(msg);
req->pdusession_id = drb_id;
req->ue_id = rnti;
req->buffer_availability = rlc_tx_buffer_space; //10000000; //Hardcoding to be removed and read the actual RLC buffer availability instead
extern instance_t DUuniqInstance;
itti_send_msg_to_task(TASK_GTPV1_U, DUuniqInstance, msg);
}
}
/* Fill the UE context setup response ITTI message to send to F1AP */
resp->gNB_CU_ue_id = req->gNB_CU_ue_id;
resp->rnti = ctxt.rntiMaybeUEid;
if(DRB_configList){
if(DRB_configList->list.count > 0){
resp->drbs_to_be_setup = calloc(1,DRB_configList->list.count*sizeof(f1ap_drb_to_be_setup_t));
resp->drbs_to_be_setup_length = DRB_configList->list.count;
for (int i=0; i<DRB_configList->list.count; i++){
resp->drbs_to_be_setup[i].drb_id = DRB_configList->list.array[i]->drb_Identity;
resp->drbs_to_be_setup[i].rlc_mode = RLC_MODE_AM;
resp->drbs_to_be_setup[i].up_dl_tnl[0].teid = incoming_teid;
resp->drbs_to_be_setup[i].up_dl_tnl[0].tl_address = inet_addr(mac->eth_params_n.my_addr);
resp->drbs_to_be_setup[i].up_dl_tnl_length = 1;
}
}
else{
LOG_W(NR_RRC, "No DRB added upon reception of F1 UE context modification request with a DRB to setup list\n");
}
}
if(SRB_configList){
if(SRB_configList->list.count >0 && SRBs_before_new_addition < SRB_configList->list.count){
resp->srbs_to_be_setup = calloc(1,req->srbs_to_be_setup_length*sizeof(f1ap_srb_to_be_setup_t));
resp->srbs_to_be_setup_length = req->srbs_to_be_setup_length;
for (int i=SRBs_before_new_addition; i<SRB_configList->list.count; i++){
resp->srbs_to_be_setup[i-SRBs_before_new_addition].srb_id = SRB_configList->list.array[i]->srb_Identity;
}
}
else{
LOG_W(NR_RRC, "No SRB added upon reception of F1 UE Context modification request at the DU\n");
}
}
else{
LOG_W(NR_RRC, "No SRB added upon reception of F1 UE Context modification request at the DU\n");
}
//if(cellGroupConfig != NULL) {
resp->du_to_cu_rrc_information = calloc(1,sizeof(du_to_cu_rrc_information_t));
resp->du_to_cu_rrc_information->cellGroupConfig = calloc(1,1024);
asn_enc_rval_t enc_rval = uper_encode_to_buffer(&asn_DEF_NR_CellGroupConfig,
NULL,
UE->masterCellGroup, //(void *)cellGroupConfig,
resp->du_to_cu_rrc_information->cellGroupConfig,
1024);
resp->du_to_cu_rrc_information->cellGroupConfig_length = (enc_rval.encoded+7)>>3;
//}
itti_send_msg_to_task (TASK_DU_F1, ctxt.module_id, message_p);
}
static void rrc_CU_process_ue_context_setup_response(MessageDef *msg_p, instance_t instance)
{
f1ap_ue_context_setup_t * resp=&F1AP_UE_CONTEXT_SETUP_RESP(msg_p);
gNB_RRC_INST *rrc = RC.nrrrc[instance];
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_get_ue_context_by_rnti(rrc, resp->rnti);
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
NR_CellGroupConfig_t *cellGroupConfig = NULL;
asn_dec_rval_t dec_rval = uper_decode_complete(NULL,
&asn_DEF_NR_CellGroupConfig,
(void **)&cellGroupConfig,
(uint8_t *)resp->du_to_cu_rrc_information->cellGroupConfig,
resp->du_to_cu_rrc_information->cellGroupConfig_length);
AssertFatal(dec_rval.code == RC_OK && dec_rval.consumed > 0, "Cell group config decode error\n");
if (UE->masterCellGroup) {
ASN_STRUCT_FREE(asn_DEF_NR_CellGroupConfig, UE->masterCellGroup);
LOG_I(RRC, "UE %04x replacing existing CellGroupConfig with new one received from DU\n", UE->rnti);
}
UE->masterCellGroup = cellGroupConfig;
if (LOG_DEBUGFLAG(DEBUG_ASN1))
xer_fprint(stdout, &asn_DEF_NR_CellGroupConfig, UE->masterCellGroup);
/* at this point, we don't have to do anything: the UE context setup request
* includes the Security Command, whose response will trigger the following
* messages (UE capability, to be specific) */
}
static void rrc_CU_process_ue_context_modification_response(MessageDef *msg_p, instance_t instance)
{
f1ap_ue_context_setup_t *resp=&F1AP_UE_CONTEXT_SETUP_RESP(msg_p);
protocol_ctxt_t ctxt = {.rntiMaybeUEid = resp->rnti, .module_id = instance, .instance = instance, .enb_flag = 1, .eNB_index = instance};
gNB_RRC_INST *rrc = RC.nrrrc[ctxt.module_id];
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_get_ue_context_by_rnti(rrc, resp->rnti);
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
e1ap_bearer_setup_req_t req = {0};
req.numPDUSessionsMod = UE->nb_of_pdusessions;
req.gNB_cu_cp_ue_id = UE->gNB_ue_ngap_id;
req.rnti = UE->rnti;
for (int i=0; i < req.numPDUSessionsMod; i++) {
req.pduSessionMod[i].numDRB2Modify = resp->drbs_to_be_setup_length;
for (int j=0; j < resp->drbs_to_be_setup_length; j++) {
f1ap_drb_to_be_setup_t *drb_f1 = resp->drbs_to_be_setup + j;
DRB_nGRAN_to_setup_t *drb_e1 = req.pduSessionMod[i].DRBnGRanModList + j;
drb_e1->id = drb_f1->drb_id;
drb_e1->numDlUpParam = drb_f1->up_dl_tnl_length;
drb_e1->DlUpParamList[0].tlAddress = drb_f1->up_dl_tnl[0].tl_address;
drb_e1->DlUpParamList[0].teId = drb_f1->up_dl_tnl[0].teid;
}
}
// send the F1 response message up to update F1-U tunnel info
// it seems the rrc transaction id (xid) is not needed here
rrc->cucp_cuup.bearer_context_mod(&req, instance, 0);
NR_CellGroupConfig_t *cellGroupConfig = NULL;
if(resp->du_to_cu_rrc_information->cellGroupConfig!=NULL){
asn_dec_rval_t dec_rval = uper_decode_complete( NULL,
&asn_DEF_NR_CellGroupConfig,
(void **)&cellGroupConfig,
(uint8_t *)resp->du_to_cu_rrc_information->cellGroupConfig,
(int) resp->du_to_cu_rrc_information->cellGroupConfig_length);
if((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) {
AssertFatal(1==0,"Cell group config decode error\n");
// free the memory
SEQUENCE_free( &asn_DEF_NR_CellGroupConfig, cellGroupConfig, 1 );
return;
}
//xer_fprint(stdout,&asn_DEF_NR_CellGroupConfig, cellGroupConfig);
if (UE->masterCellGroup == NULL) {
UE->masterCellGroup = calloc(1, sizeof(NR_CellGroupConfig_t));
}
if(cellGroupConfig->rlc_BearerToAddModList!=NULL){
if (UE->masterCellGroup->rlc_BearerToAddModList != NULL) {
int ue_ctxt_rlc_Bearers = UE->masterCellGroup->rlc_BearerToAddModList->list.count;
for(int i=ue_ctxt_rlc_Bearers; i<ue_ctxt_rlc_Bearers + cellGroupConfig->rlc_BearerToAddModList->list.count; i++){
asn1cSeqAdd(&UE->masterCellGroup->rlc_BearerToAddModList->list, cellGroupConfig->rlc_BearerToAddModList->list.array[i - ue_ctxt_rlc_Bearers]);
}
} else {
LOG_W(NR_RRC, "Empty rlc_BearerToAddModList at ue_context of the CU before filling the updates from UE context setup response \n");
UE->masterCellGroup->rlc_BearerToAddModList = calloc(1, sizeof(*cellGroupConfig->rlc_BearerToAddModList));
memcpy(UE->masterCellGroup->rlc_BearerToAddModList, cellGroupConfig->rlc_BearerToAddModList, sizeof(*cellGroupConfig->rlc_BearerToAddModList));
}
}
LOG_I(NR_RRC, "Updated master cell group configuration stored at the UE context of the CU:\n");
if (LOG_DEBUGFLAG(DEBUG_ASN1)) {
xer_fprint(stdout, &asn_DEF_NR_CellGroupConfig, UE->masterCellGroup);
}
rrc_gNB_generate_dedicatedRRCReconfiguration(&ctxt, ue_context_p, cellGroupConfig);
free(cellGroupConfig->rlc_BearerToAddModList);
free(cellGroupConfig);
}
}
unsigned int mask_flip(unsigned int x) {
return((((x>>8) + (x<<8))&0xffff)>>6);
}
static unsigned int get_dl_bw_mask(const gNB_RRC_INST *rrc, const NR_UE_NR_Capability_t *cap)
{
int common_band = *rrc->carrier.servingcellconfigcommon->downlinkConfigCommon->frequencyInfoDL->frequencyBandList.list.array[0];
int common_scs = rrc->carrier.servingcellconfigcommon->downlinkConfigCommon->frequencyInfoDL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing;
for (int i=0;i<cap->rf_Parameters.supportedBandListNR.list.count;i++) {
NR_BandNR_t *bandNRinfo = cap->rf_Parameters.supportedBandListNR.list.array[i];
if (bandNRinfo->bandNR == common_band) {
if (common_band < 257) { // FR1
switch (common_scs) {
case NR_SubcarrierSpacing_kHz15 :
if (bandNRinfo->channelBWs_DL &&
bandNRinfo->channelBWs_DL->choice.fr1 &&
bandNRinfo->channelBWs_DL->choice.fr1->scs_15kHz)
return(mask_flip((unsigned int)*(uint16_t*)bandNRinfo->channelBWs_DL->choice.fr1->scs_15kHz->buf));
break;
case NR_SubcarrierSpacing_kHz30 :
if (bandNRinfo->channelBWs_DL &&
bandNRinfo->channelBWs_DL->choice.fr1 &&
bandNRinfo->channelBWs_DL->choice.fr1->scs_30kHz)
return(mask_flip((unsigned int)*(uint16_t*)bandNRinfo->channelBWs_DL->choice.fr1->scs_30kHz->buf));
break;
case NR_SubcarrierSpacing_kHz60 :
if (bandNRinfo->channelBWs_DL &&
bandNRinfo->channelBWs_DL->choice.fr1 &&
bandNRinfo->channelBWs_DL->choice.fr1->scs_60kHz)
return(mask_flip((unsigned int)*(uint16_t*)bandNRinfo->channelBWs_DL->choice.fr1->scs_60kHz->buf));
break;
}
}
else {
switch (common_scs) {
case NR_SubcarrierSpacing_kHz60 :
if (bandNRinfo->channelBWs_DL &&
bandNRinfo->channelBWs_DL->choice.fr2 &&
bandNRinfo->channelBWs_DL->choice.fr2->scs_60kHz)
return(mask_flip((unsigned int)*(uint16_t*)bandNRinfo->channelBWs_DL->choice.fr2->scs_60kHz->buf));
break;
case NR_SubcarrierSpacing_kHz120 :
if (bandNRinfo->channelBWs_DL &&
bandNRinfo->channelBWs_DL->choice.fr2 &&
bandNRinfo->channelBWs_DL->choice.fr2->scs_120kHz)
return(mask_flip((unsigned int)*(uint16_t*)bandNRinfo->channelBWs_DL->choice.fr2->scs_120kHz->buf));
break;
}
}
}
}
return(0);
}
static unsigned int get_ul_bw_mask(const gNB_RRC_INST *rrc, const NR_UE_NR_Capability_t *cap)
{
int common_band = *rrc->carrier.servingcellconfigcommon->uplinkConfigCommon->frequencyInfoUL->frequencyBandList->list.array[0];
int common_scs = rrc->carrier.servingcellconfigcommon->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing;
for (int i=0;i<cap->rf_Parameters.supportedBandListNR.list.count;i++) {
NR_BandNR_t *bandNRinfo = cap->rf_Parameters.supportedBandListNR.list.array[i];
if (bandNRinfo->bandNR == common_band) {
if (common_band < 257) { // FR1
switch (common_scs) {
case NR_SubcarrierSpacing_kHz15 :
if (bandNRinfo->channelBWs_UL &&
bandNRinfo->channelBWs_UL->choice.fr1 &&
bandNRinfo->channelBWs_UL->choice.fr1->scs_15kHz)
return(mask_flip((unsigned int)*(uint16_t*)bandNRinfo->channelBWs_UL->choice.fr1->scs_15kHz->buf));
break;
case NR_SubcarrierSpacing_kHz30 :
if (bandNRinfo->channelBWs_UL &&
bandNRinfo->channelBWs_UL->choice.fr1 &&
bandNRinfo->channelBWs_UL->choice.fr1->scs_30kHz)
return(mask_flip((unsigned int)*(uint16_t*)bandNRinfo->channelBWs_UL->choice.fr1->scs_30kHz->buf));
break;
case NR_SubcarrierSpacing_kHz60 :
if (bandNRinfo->channelBWs_UL &&
bandNRinfo->channelBWs_UL->choice.fr1 &&
bandNRinfo->channelBWs_UL->choice.fr1->scs_60kHz)
return(mask_flip((unsigned int)*(uint16_t*)bandNRinfo->channelBWs_UL->choice.fr1->scs_60kHz->buf));
break;
}
}
else {
switch (common_scs) {
case NR_SubcarrierSpacing_kHz60 :
if (bandNRinfo->channelBWs_UL &&
bandNRinfo->channelBWs_UL->choice.fr2 &&
bandNRinfo->channelBWs_UL->choice.fr2->scs_60kHz)
return(mask_flip((unsigned int)*(uint16_t*)bandNRinfo->channelBWs_UL->choice.fr2->scs_60kHz->buf));
break;
case NR_SubcarrierSpacing_kHz120 :
if (bandNRinfo->channelBWs_UL &&
bandNRinfo->channelBWs_UL->choice.fr2 &&
bandNRinfo->channelBWs_UL->choice.fr2->scs_120kHz)
return(mask_flip((unsigned int)*(uint16_t*)bandNRinfo->channelBWs_UL->choice.fr2->scs_120kHz->buf));
break;
}
}
}
}
return(0);
}
static int get_ul_mimo_layersCB(const gNB_RRC_INST *rrc, const NR_UE_NR_Capability_t *cap)
{
int common_scs = rrc->carrier.servingcellconfigcommon->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing;
// check featureSet
NR_FeatureSets_t *fs=cap->featureSets;
if (fs) {
// go through UL feature sets and look for one with current SCS
for (int i=0;i<fs->featureSetsUplinkPerCC->list.count;i++) {
if (fs->featureSetsUplinkPerCC->list.array[i]->supportedSubcarrierSpacingUL == common_scs &&
fs->featureSetsUplinkPerCC->list.array[i]->mimo_CB_PUSCH &&
fs->featureSetsUplinkPerCC->list.array[i]->mimo_CB_PUSCH->maxNumberMIMO_LayersCB_PUSCH)
return(1<<*fs->featureSetsUplinkPerCC->list.array[i]->mimo_CB_PUSCH->maxNumberMIMO_LayersCB_PUSCH);
}
}
return(1);
}
static int get_ul_mimo_layers(const gNB_RRC_INST *rrc, const NR_UE_NR_Capability_t *cap)
{
int common_scs = rrc->carrier.servingcellconfigcommon->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing;
// check featureSet
NR_FeatureSets_t *fs=cap->featureSets;
if (fs) {
// go through UL feature sets and look for one with current SCS
for (int i=0;i<fs->featureSetsUplinkPerCC->list.count;i++) {
if (fs->featureSetsUplinkPerCC->list.array[i]->supportedSubcarrierSpacingUL == common_scs &&
fs->featureSetsUplinkPerCC->list.array[i]->maxNumberMIMO_LayersNonCB_PUSCH)
return(1<<*fs->featureSetsUplinkPerCC->list.array[i]->maxNumberMIMO_LayersNonCB_PUSCH);
}
}
return(1);
}
static int get_dl_mimo_layers(const gNB_RRC_INST *rrc, const NR_UE_NR_Capability_t *cap)
{
int common_scs = rrc->carrier.servingcellconfigcommon->downlinkConfigCommon->frequencyInfoDL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing;
// check featureSet
NR_FeatureSets_t *fs=cap->featureSets;
if (fs) {
// go through UL feature sets and look for one with current SCS
for (int i=0;i<fs->featureSetsDownlinkPerCC->list.count;i++) {
if (fs->featureSetsUplinkPerCC->list.array[i]->supportedSubcarrierSpacingUL == common_scs &&
fs->featureSetsDownlinkPerCC->list.array[i]->maxNumberMIMO_LayersPDSCH)
return(2<<*fs->featureSetsDownlinkPerCC->list.array[i]->maxNumberMIMO_LayersPDSCH);
}
}
return(1);
}
void nr_rrc_subframe_process(protocol_ctxt_t *const ctxt_pP, const int CC_id) {
MessageDef *msg;
gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
rrc_gNB_ue_context_t *ue_context_p = NULL;
RB_FOREACH(ue_context_p, rrc_nr_ue_tree_s, &rrc->rrc_ue_head)
{
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
ctxt_pP->rntiMaybeUEid = UE->rnti;
if (UE->ul_failure_timer > 0) {
UE->ul_failure_timer++;
if (UE->ul_failure_timer >= 20000) {
// remove UE after 20 seconds after MAC (or else) has indicated UL failure
LOG_I(RRC, "Removing UE %x instance, because of uplink failure timer timeout\n", UE->rnti);
if (UE->StatusRrc >= NR_RRC_CONNECTED) {
rrc_gNB_send_NGAP_UE_CONTEXT_RELEASE_REQ(
ctxt_pP->module_id,
ue_context_p,
NGAP_CAUSE_RADIO_NETWORK,
NGAP_CAUSE_RADIO_NETWORK_RADIO_CONNECTION_WITH_UE_LOST);
}
// Remove here the MAC and RRC context when RRC is not connected
if (UE->StatusRrc < NR_RRC_CONNECTED) {
if (!NODE_IS_CU(rrc->node_type)) {
nr_rrc_mac_remove_ue(ctxt_pP->rntiMaybeUEid);
rrc_rlc_remove_ue(ctxt_pP);
nr_pdcp_remove_UE(ctxt_pP->rntiMaybeUEid);
/* remove RRC UE Context */
ue_context_p = rrc_gNB_get_ue_context_by_rnti(rrc, UE->rnti);
if (ue_context_p) {
LOG_I(NR_RRC, "remove UE %04x \n", UE->rnti);
rrc_gNB_remove_ue_context(rrc, ue_context_p);
break; // We must not access this UE context
}
}
// In case of CU trigger UE context release command towards the DU
else {
MessageDef *message_p;
message_p = itti_alloc_new_message (TASK_RRC_GNB, 0, F1AP_UE_CONTEXT_RELEASE_CMD);
f1ap_ue_context_release_cmd_t *rel_cmd=&F1AP_UE_CONTEXT_RELEASE_CMD (message_p);
rel_cmd->rnti = UE->rnti;
rel_cmd->cause = F1AP_CAUSE_RADIO_NETWORK;
rel_cmd->cause_value = 10; // 10 = F1AP_CauseRadioNetwork_normal_release
itti_send_msg_to_task(TASK_CU_F1, ctxt_pP->module_id, message_p);
}
}
break; // break RB_FOREACH
}
}
if (UE->ue_release_timer_rrc > 0) {
UE->ue_release_timer_rrc++;
if (UE->ue_release_timer_rrc >= UE->ue_release_timer_thres_rrc) {
LOG_I(NR_RRC, "Removing UE %x instance after UE_CONTEXT_RELEASE_Complete (ue_release_timer_rrc timeout)\n", UE->rnti);
UE->ue_release_timer_rrc = 0;
if (!NODE_IS_CU(RC.nrrrc[0]->node_type)) {
nr_rrc_mac_remove_ue(ctxt_pP->rntiMaybeUEid);
}
rrc_rlc_remove_ue(ctxt_pP);
nr_pdcp_remove_UE(ctxt_pP->rntiMaybeUEid);
newGtpuDeleteAllTunnels(ctxt_pP->instance, UE->rnti);
/* remove RRC UE Context */
LOG_I(NR_RRC, "remove UE %04x \n", UE->rnti);
rrc_gNB_remove_ue_context(rrc, ue_context_p);
break; // break RB_FOREACH
}
}
}
/* send a tick to x2ap */
if (is_x2ap_enabled()){
msg = itti_alloc_new_message(TASK_RRC_ENB, 0, X2AP_SUBFRAME_PROCESS);
itti_send_msg_to_task(TASK_X2AP, ctxt_pP->module_id, msg);
}
}
int rrc_gNB_process_e1_setup_req(e1ap_setup_req_t *req, instance_t instance) {
AssertFatal(req->supported_plmns <= PLMN_LIST_MAX_SIZE, "Supported PLMNs is more than PLMN_LIST_MAX_SIZE\n");
gNB_RRC_INST *rrc = RC.nrrrc[0]; //TODO: remove hardcoding of RC index here
MessageDef *msg_p = itti_alloc_new_message(TASK_RRC_GNB, instance, E1AP_SETUP_RESP);
e1ap_setup_resp_t *resp = &E1AP_SETUP_RESP(msg_p);
resp->transac_id = req->transac_id;
for (int i=0; i < req->supported_plmns; i++) {
if (rrc->configuration.mcc[i] == req->plmns[i].mcc &&
rrc->configuration.mnc[i] == req->plmns[i].mnc) {
LOG_E(NR_RRC, "PLMNs received from CUUP (mcc:%d, mnc:%d) did not match with PLMNs in RRC (mcc:%d, mnc:%d)\n",
req->plmns[i].mcc, req->plmns[i].mnc, rrc->configuration.mcc[i], rrc->configuration.mnc[i]);
return -1;
}
}
itti_send_msg_to_task(TASK_CUCP_E1, instance, msg_p);
return 0;
}
void prepare_and_send_ue_context_modification_f1(rrc_gNB_ue_context_t *ue_context_p,
e1ap_bearer_setup_resp_t *e1ap_resp) {
/*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*/
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
protocol_ctxt_t ctxt = {0};
PROTOCOL_CTXT_SET_BY_MODULE_ID(&ctxt, 0, GNB_FLAG_YES, UE->rnti, 0, 0, 0);
// TODO: So many hard codings
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->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*/
req->drbs_to_be_setup_length = e1ap_resp->pduSession[0].numDRBSetup;
req->drbs_to_be_setup = malloc(1*sizeof(f1ap_drb_to_be_setup_t)*req->drbs_to_be_setup_length);
for (int i=0; i < e1ap_resp->pduSession[0].numDRBSetup; i++) {
f1ap_drb_to_be_setup_t *DRBs = req->drbs_to_be_setup + i;
DRBs[i].drb_id = e1ap_resp->pduSession[0].DRBnGRanList[i].id;
DRBs[i].rlc_mode = RLC_MODE_AM;
DRBs[i].up_ul_tnl[0].tl_address = e1ap_resp->pduSession[0].DRBnGRanList[i].UpParamList[0].tlAddress;
DRBs[i].up_ul_tnl[0].port = RC.nrrrc[ctxt.module_id]->eth_params_s.my_portd;
DRBs[i].up_ul_tnl[0].teid = e1ap_resp->pduSession[0].DRBnGRanList[i].UpParamList[0].teId;
DRBs[i].up_ul_tnl_length = 1;
}
itti_send_msg_to_task (TASK_CU_F1, ctxt.module_id, message_p);
}
void rrc_gNB_process_e1_bearer_context_setup_resp(e1ap_bearer_setup_resp_t *resp, instance_t instance) {
// Find the UE context from UE ID and send ITTI message to F1AP to send UE context modification message to DU
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_get_ue_context(RC.nrrrc[instance], resp->gNB_cu_cp_ue_id);
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
protocol_ctxt_t ctxt = {0};
PROTOCOL_CTXT_SET_BY_MODULE_ID(&ctxt, 0, GNB_FLAG_YES, UE->rnti, 0, 0, 0);
gtpv1u_gnb_create_tunnel_resp_t create_tunnel_resp={0};
create_tunnel_resp.num_tunnels = resp->numPDUSessions;
for (int i=0; i < resp->numPDUSessions; i++) {
create_tunnel_resp.pdusession_id[i] = resp->pduSession[i].id;
create_tunnel_resp.gnb_NGu_teid[i] = resp->pduSession[i].teId;
memcpy(create_tunnel_resp.gnb_addr.buffer,
&resp->pduSession[i].tlAddress,
sizeof(in_addr_t));
create_tunnel_resp.gnb_addr.length = sizeof(in_addr_t); // IPv4 byte length
}
nr_rrc_gNB_process_GTPV1U_CREATE_TUNNEL_RESP(&ctxt, &create_tunnel_resp, 0);
// TODO: SV: combine e1ap_bearer_setup_req_t and e1ap_bearer_setup_resp_t and minimize assignments
prepare_and_send_ue_context_modification_f1(ue_context_p, resp);
}
static void print_rrc_meas(FILE *f, const NR_MeasResults_t *measresults)
{
DevAssert(measresults->measResultServingMOList.list.count >= 1);
if (measresults->measResultServingMOList.list.count > 1)
LOG_W(RRC, "Received %d MeasResultServMO, but handling only 1!\n", measresults->measResultServingMOList.list.count);
NR_MeasResultServMO_t *measresultservmo = measresults->measResultServingMOList.list.array[0];
NR_MeasResultNR_t *measresultnr = &measresultservmo->measResultServingCell;
NR_MeasQuantityResults_t *mqr = measresultnr->measResult.cellResults.resultsSSB_Cell;
fprintf(f, " servingCellId %ld MeasResultNR for phyCellId %ld:\n resultSSB:", measresultservmo->servCellId, *measresultnr->physCellId);
if (mqr != NULL) {
const long rrsrp = *mqr->rsrp - 156;
const float rrsrq = (float) (*mqr->rsrq - 87) / 2.0f;
const float rsinr = (float) (*mqr->sinr - 46) / 2.0f;
fprintf(f, "RSRP %ld dBm RSRQ %.1f dB SINR %.1f dB\n", rrsrp, rrsrq, rsinr);
} else {
fprintf(f, "NOT PROVIDED\n");
}
}
static void write_rrc_stats(const gNB_RRC_INST *rrc)
{
const char *filename = "nrRRC_stats.log";
FILE *f = fopen(filename, "w");
if (f == NULL) {
LOG_E(NR_RRC, "cannot open %s for writing\n", filename);
return;
}
rrc_gNB_ue_context_t *ue_context_p = NULL;
/* cast is necessary to eliminate warning "discards ‘const’ qualifier" */
RB_FOREACH(ue_context_p, rrc_nr_ue_tree_s, &((gNB_RRC_INST *)rrc)->rrc_ue_head)
{
const gNB_RRC_UE_t *ue_ctxt = &ue_context_p->ue_context;
const rnti_t rnti = ue_ctxt->rnti;
fprintf(f, "NR RRC UE rnti %04x:", rnti);
if (ue_ctxt->Initialue_identity_5g_s_TMSI.presence)
fprintf(f, " S-TMSI %x\n", ue_ctxt->Initialue_identity_5g_s_TMSI.fiveg_tmsi);
fprintf(f, " failure timer %d/8\n", ue_ctxt->ul_failure_timer);
if (ue_ctxt->UE_Capability_nr) {
fprintf(f,
" UE cap: BW DL %x. BW UL %x, DL MIMO Layers %d UL MIMO Layers (CB) %d UL MIMO Layers (nonCB) %d\n",
get_dl_bw_mask(rrc, ue_ctxt->UE_Capability_nr),
get_ul_bw_mask(rrc, ue_ctxt->UE_Capability_nr),
get_dl_mimo_layers(rrc, ue_ctxt->UE_Capability_nr),
get_ul_mimo_layersCB(rrc, ue_ctxt->UE_Capability_nr),
get_ul_mimo_layers(rrc, ue_ctxt->UE_Capability_nr));
}
if (ue_ctxt->measResults)
print_rrc_meas(f, ue_ctxt->measResults);
}
fclose(f);
}
///---------------------------------------------------------------------------------------------------------------///
///---------------------------------------------------------------------------------------------------------------///
void *rrc_gnb_task(void *args_p) {
MessageDef *msg_p;
instance_t instance;
int result;
protocol_ctxt_t ctxt = {.module_id = 0, .enb_flag = 1, .instance = 0, .rntiMaybeUEid = 0, .frame = -1, .subframe = -1, .eNB_index = 0, .brOption = false};
/* timer to write stats to file */
long stats_timer_id = 1;
timer_setup(1, 0, TASK_RRC_GNB, 0, TIMER_PERIODIC, NULL, &stats_timer_id);
itti_mark_task_ready(TASK_RRC_GNB);
LOG_I(NR_RRC,"Entering main loop of NR_RRC message task\n");
while (1) {
// Wait for a message
itti_receive_msg(TASK_RRC_GNB, &msg_p);
const char *msg_name_p = ITTI_MSG_NAME(msg_p);
instance = ITTI_MSG_DESTINATION_INSTANCE(msg_p);
LOG_D(NR_RRC, "Received Msg %s\n", msg_name_p);
switch (ITTI_MSG_ID(msg_p)) {
case TERMINATE_MESSAGE:
LOG_W(NR_RRC, " *** Exiting NR_RRC thread\n");
itti_exit_task();
break;
case MESSAGE_TEST:
LOG_I(NR_RRC, "[gNB %ld] Received %s\n", instance, msg_name_p);
break;
case TIMER_HAS_EXPIRED:
/* only this one handled for now */
DevAssert(TIMER_HAS_EXPIRED(msg_p).timer_id == stats_timer_id);
write_rrc_stats(RC.nrrrc[0]);
break;
case RRC_SUBFRAME_PROCESS:
nr_rrc_subframe_process(&RRC_SUBFRAME_PROCESS(msg_p).ctxt, RRC_SUBFRAME_PROCESS(msg_p).CC_id);
break;
case F1AP_INITIAL_UL_RRC_MESSAGE:
AssertFatal(NODE_IS_CU(RC.nrrrc[instance]->node_type) || NODE_IS_MONOLITHIC(RC.nrrrc[instance]->node_type),
"should not receive F1AP_INITIAL_UL_RRC_MESSAGE, need call by CU!\n");
rrc_gNB_process_initial_ul_rrc_message(&F1AP_INITIAL_UL_RRC_MESSAGE(msg_p));
break;
/* Messages from PDCP */
case F1AP_UL_RRC_MESSAGE:
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt,
instance,
GNB_FLAG_YES,
F1AP_UL_RRC_MESSAGE(msg_p).rnti,
0,
0);
LOG_D(NR_RRC,
"Decoding DCCH %d: ue %04lx, inst %ld, ctxt %p, size %d\n",
F1AP_UL_RRC_MESSAGE(msg_p).srb_id,
ctxt.rntiMaybeUEid,
instance,
&ctxt,
F1AP_UL_RRC_MESSAGE(msg_p).rrc_container_length);
rrc_gNB_decode_dcch(&ctxt,
F1AP_UL_RRC_MESSAGE(msg_p).srb_id,
F1AP_UL_RRC_MESSAGE(msg_p).rrc_container,
F1AP_UL_RRC_MESSAGE(msg_p).rrc_container_length);
free(F1AP_UL_RRC_MESSAGE(msg_p).rrc_container);
break;
case NGAP_DOWNLINK_NAS:
rrc_gNB_process_NGAP_DOWNLINK_NAS(msg_p, instance, &rrc_gNB_mui);
break;
case NGAP_PDUSESSION_SETUP_REQ:
rrc_gNB_process_NGAP_PDUSESSION_SETUP_REQ(msg_p, instance);
break;
case NGAP_PDUSESSION_MODIFY_REQ:
rrc_gNB_process_NGAP_PDUSESSION_MODIFY_REQ(msg_p, instance);
break;
case NGAP_PDUSESSION_RELEASE_COMMAND:
rrc_gNB_process_NGAP_PDUSESSION_RELEASE_COMMAND(msg_p, instance);
break;
/* Messages from gNB app */
case NRRRC_CONFIGURATION_REQ:
openair_rrc_gNB_configuration(instance, &NRRRC_CONFIGURATION_REQ(msg_p));
break;
/* Messages from F1AP task */
case F1AP_SETUP_REQ:
AssertFatal(NODE_IS_CU(RC.nrrrc[instance]->node_type), "should not receive F1AP_SETUP_REQUEST, need call by CU!\n");
rrc_gNB_process_f1_setup_req(&F1AP_SETUP_REQ(msg_p));
break;
case F1AP_UE_CONTEXT_SETUP_RESP:
rrc_CU_process_ue_context_setup_response(msg_p, instance);
break;
case F1AP_UE_CONTEXT_MODIFICATION_RESP:
rrc_CU_process_ue_context_modification_response(msg_p, instance);
break;
case F1AP_UE_CONTEXT_MODIFICATION_REQ:
rrc_DU_process_ue_context_modification_request(msg_p, instance);
break;
case F1AP_UE_CONTEXT_RELEASE_CMD:
LOG_W(NR_RRC, "Received F1AP_UE_CONTEXT_RELEASE_CMD for processing at the RRC layer of the DU. Processing function "
"implementation is pending\n");
break;
/* Messages from X2AP */
case X2AP_ENDC_SGNB_ADDITION_REQ:
LOG_I(NR_RRC, "Received ENDC sgNB addition request from X2AP \n");
rrc_gNB_process_AdditionRequestInformation(instance, &X2AP_ENDC_SGNB_ADDITION_REQ(msg_p));
break;
case X2AP_ENDC_SGNB_RECONF_COMPLETE:
LOG_A(NR_RRC, "Handling of reconfiguration complete message at RRC gNB is pending \n");
break;
case NGAP_INITIAL_CONTEXT_SETUP_REQ:
rrc_gNB_process_NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p, instance);
break;
case X2AP_ENDC_SGNB_RELEASE_REQUEST:
LOG_I(NR_RRC, "Received ENDC sgNB release request from X2AP \n");
rrc_gNB_process_release_request(instance, &X2AP_ENDC_SGNB_RELEASE_REQUEST(msg_p));
break;
case X2AP_ENDC_DC_OVERALL_TIMEOUT:
rrc_gNB_process_dc_overall_timeout(instance, &X2AP_ENDC_DC_OVERALL_TIMEOUT(msg_p));
break;
case NGAP_UE_CONTEXT_RELEASE_REQ:
rrc_gNB_process_NGAP_UE_CONTEXT_RELEASE_REQ(msg_p, instance);
break;
case NGAP_UE_CONTEXT_RELEASE_COMMAND:
rrc_gNB_process_NGAP_UE_CONTEXT_RELEASE_COMMAND(msg_p, instance);
break;
case E1AP_SETUP_REQ:
rrc_gNB_process_e1_setup_req(&E1AP_SETUP_REQ(msg_p), instance);
break;
case E1AP_BEARER_CONTEXT_SETUP_RESP:
rrc_gNB_process_e1_bearer_context_setup_resp(&E1AP_BEARER_CONTEXT_SETUP_RESP(msg_p), instance);
case NGAP_PAGING_IND:
rrc_gNB_process_PAGING_IND(msg_p, instance);
break;
default:
LOG_E(NR_RRC, "[gNB %ld] Received unexpected message %s\n", instance, msg_name_p);
break;
}
result = itti_free(ITTI_MSG_ORIGIN_ID(msg_p), msg_p);
AssertFatal(result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
msg_p = NULL;
}
}
static void rrc_deliver_ue_ctxt_setup_req(void *deliver_pdu_data, ue_id_t ue_id, int srb_id, char *buf, int size, int sdu_id)
{
DevAssert(deliver_pdu_data != NULL);
gNB_RRC_INST *rrc = deliver_pdu_data;
f1ap_ue_context_setup_t ue_context_setup_req = {
.gNB_CU_ue_id = 0xffffffff, /* filled by F1 for the moment */
.gNB_DU_ue_id = 0xffffffff, /* filled by F1 for the moment */
.rnti = ue_id,
.mcc = rrc->configuration.mcc[0],
.mnc = rrc->configuration.mnc[0],
.mnc_digit_length = rrc->configuration.mnc_digit_length[0],
.nr_cellid = rrc->nr_cellid,
.servCellId = 0, /* TODO: correct value? */
.srbs_to_be_setup = 0, /* no new SRBs */
.drbs_to_be_setup = 0, /* no new DRBs */
.rrc_container = (uint8_t*) buf, /* security mode command */
.rrc_container_length = size,
};
rrc->mac_rrc.ue_context_setup_request(&ue_context_setup_req);
}
//-----------------------------------------------------------------------------
void
rrc_gNB_generate_SecurityModeCommand(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *const ue_context_pP
)
//-----------------------------------------------------------------------------
{
uint8_t buffer[100];
uint8_t size;
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
T(T_ENB_RRC_SECURITY_MODE_COMMAND, T_INT(ctxt_pP->module_id), T_INT(ctxt_pP->frame), T_INT(ctxt_pP->subframe), T_INT(ctxt_pP->rntiMaybeUEid));
NR_IntegrityProtAlgorithm_t integrity_algorithm = (NR_IntegrityProtAlgorithm_t)ue_p->integrity_algorithm;
size = do_NR_SecurityModeCommand(ctxt_pP, buffer, rrc_gNB_get_next_transaction_identifier(ctxt_pP->module_id), ue_p->ciphering_algorithm, integrity_algorithm);
LOG_DUMPMSG(NR_RRC,DEBUG_RRC,(char *)buffer,size,"[MSG] RRC Security Mode Command\n");
LOG_I(NR_RRC, "UE %04x Logical Channel DL-DCCH, Generate SecurityModeCommand (bytes %d)\n", ue_p->rnti, size);
gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
AssertFatal(!NODE_IS_DU(rrc->node_type), "illegal node type DU!\n");
/* the callback will fill the UE context setup request and forward it */
nr_pdcp_data_req_srb(ctxt_pP->rntiMaybeUEid, DCCH, rrc_gNB_mui++, size, buffer, rrc_deliver_ue_ctxt_setup_req, rrc);
}
void
rrc_gNB_generate_UECapabilityEnquiry(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *const ue_context_pP
)
//-----------------------------------------------------------------------------
{
uint8_t buffer[100];
uint8_t size;
T(T_ENB_RRC_UE_CAPABILITY_ENQUIRY, T_INT(ctxt_pP->module_id), T_INT(ctxt_pP->frame), T_INT(ctxt_pP->subframe), T_INT(ctxt_pP->rntiMaybeUEid));
size = do_NR_SA_UECapabilityEnquiry(
ctxt_pP,
buffer,
rrc_gNB_get_next_transaction_identifier(ctxt_pP->module_id));
LOG_I(NR_RRC,
PROTOCOL_NR_RRC_CTXT_UE_FMT" Logical Channel DL-DCCH, Generate NR UECapabilityEnquiry (bytes %d)\n",
PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP),
size);
gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
AssertFatal(!NODE_IS_DU(rrc->node_type), "illegal node type DU!\n");
nr_pdcp_data_req_srb(ctxt_pP->rntiMaybeUEid, DCCH, rrc_gNB_mui++, size, buffer, deliver_pdu_srb_f1, rrc);
}
//-----------------------------------------------------------------------------
/*
* Generate the RRC Connection Release to UE.
* If received, UE should switch to RRC_IDLE mode.
*/
void
rrc_gNB_generate_RRCRelease(
const protocol_ctxt_t *const ctxt_pP,
rrc_gNB_ue_context_t *const ue_context_pP
)
//-----------------------------------------------------------------------------
{
uint8_t buffer[RRC_BUF_SIZE] = {0};
int size = do_NR_RRCRelease(buffer, RRC_BUF_SIZE, rrc_gNB_get_next_transaction_identifier(ctxt_pP->module_id));
gNB_RRC_UE_t *ue_p = &ue_context_pP->ue_context;
ue_p->ue_reestablishment_timer = 0;
ue_p->ue_release_timer = 0;
ue_p->ul_failure_timer = 0;
ue_p->ue_release_timer_rrc = 0;
LOG_I(NR_RRC,
PROTOCOL_NR_RRC_CTXT_UE_FMT" Logical Channel DL-DCCH, Generate RRCRelease (bytes %d)\n",
PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP),
size);
LOG_D(NR_RRC,
PROTOCOL_NR_RRC_CTXT_UE_FMT" --- PDCP_DATA_REQ/%d Bytes (rrcRelease MUI %d) --->[PDCP][RB %u]\n",
PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP),
size,
rrc_gNB_mui,
DCCH);
gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
nr_pdcp_data_req_srb(ctxt_pP->rntiMaybeUEid, DCCH, rrc_gNB_mui++, size, buffer, deliver_pdu_srb_f1, rrc);
rrc_gNB_send_NGAP_UE_CONTEXT_RELEASE_COMPLETE(ctxt_pP->instance, ue_context_pP->ue_context.gNB_ue_ngap_id);
ue_context_pP->ue_context.ue_release_timer_rrc = 1;
/* TODO: 38.331 says for RRC Release that the UE should release everything
* after 60ms or if lower layers acked receipt of release. Hence, from the
* gNB POV, we can free the UE's RRC context as soon as we sent the msg.
* Currently, without the F1 interface, the ue_release timer expiration also
* triggers MAC, so we give it some time. If we send an F1 UE Context release
* message, we can free it immediately. The MAC should release it after these
* 60ms, or the ack of the DLSCH transmission. */
ue_context_pP->ue_context.ue_release_timer_thres_rrc = 5;
LOG_I(RRC, "delaying UE %ld context removal by 5ms\n", ctxt_pP->rntiMaybeUEid);
if (NODE_IS_CU(rrc->node_type)) {
uint8_t *message_buffer = itti_malloc (TASK_RRC_GNB, TASK_CU_F1, size);
memcpy (message_buffer, buffer, size);
MessageDef *m = itti_alloc_new_message(TASK_RRC_GNB, 0, F1AP_UE_CONTEXT_RELEASE_CMD);
F1AP_UE_CONTEXT_RELEASE_CMD(m).rnti = ctxt_pP->rntiMaybeUEid;
F1AP_UE_CONTEXT_RELEASE_CMD(m).cause = F1AP_CAUSE_RADIO_NETWORK;
F1AP_UE_CONTEXT_RELEASE_CMD(m).cause_value = 10; // 10 = F1AP_CauseRadioNetwork_normal_release
F1AP_UE_CONTEXT_RELEASE_CMD(m).rrc_container = message_buffer;
F1AP_UE_CONTEXT_RELEASE_CMD(m).rrc_container_length = size;
itti_send_msg_to_task(TASK_CU_F1, ctxt_pP->module_id, m);
}
}
int rrc_gNB_generate_pcch_msg(uint32_t tmsi, uint8_t paging_drx, instance_t instance, uint8_t CC_id){
const unsigned int Ttab[4] = {32,64,128,256};
uint8_t Tc;
uint8_t Tue;
uint32_t pfoffset;
uint32_t N; /* N: min(T,nB). total count of PF in one DRX cycle */
uint32_t Ns = 0; /* Ns: max(1,nB/T) */
uint8_t i_s; /* i_s = floor(UE_ID/N) mod Ns */
uint32_t T; /* DRX cycle */
uint32_t length;
uint8_t buffer[RRC_BUF_SIZE];
struct NR_SIB1 *sib1 = RC.nrrrc[instance]->carrier.siblock1->message.choice.c1->choice.systemInformationBlockType1;
/* get default DRX cycle from configuration */
Tc = sib1->servingCellConfigCommon->downlinkConfigCommon.pcch_Config.defaultPagingCycle;
Tue = paging_drx;
/* set T = min(Tc,Tue) */
T = Tc < Tue ? Ttab[Tc] : Ttab[Tue];
/* set N = PCCH-Config->nAndPagingFrameOffset */
switch (sib1->servingCellConfigCommon->downlinkConfigCommon.pcch_Config.nAndPagingFrameOffset.present) {
case NR_PCCH_Config__nAndPagingFrameOffset_PR_oneT:
N = T;
pfoffset = 0;
break;
case NR_PCCH_Config__nAndPagingFrameOffset_PR_halfT:
N = T/2;
pfoffset = 1;
break;
case NR_PCCH_Config__nAndPagingFrameOffset_PR_quarterT:
N = T/4;
pfoffset = 3;
break;
case NR_PCCH_Config__nAndPagingFrameOffset_PR_oneEighthT:
N = T/8;
pfoffset = 7;
break;
case NR_PCCH_Config__nAndPagingFrameOffset_PR_oneSixteenthT:
N = T/16;
pfoffset = 15;
break;
default:
LOG_E(RRC, "[gNB %ld] In rrc_gNB_generate_pcch_msg: pfoffset error (pfoffset %d)\n",
instance, sib1->servingCellConfigCommon->downlinkConfigCommon.pcch_Config.nAndPagingFrameOffset.present);
return (-1);
}
switch (sib1->servingCellConfigCommon->downlinkConfigCommon.pcch_Config.ns) {
case NR_PCCH_Config__ns_four:
if(*sib1->servingCellConfigCommon->downlinkConfigCommon.initialDownlinkBWP.pdcch_ConfigCommon->choice.setup->pagingSearchSpace == 0){
LOG_E(RRC, "[gNB %ld] In rrc_gNB_generate_pcch_msg: ns error only 1 or 2 is allowed when pagingSearchSpace is 0\n",
instance);
return (-1);
} else {
Ns = 4;
}
break;
case NR_PCCH_Config__ns_two:
Ns = 2;
break;
case NR_PCCH_Config__ns_one:
Ns = 1;
break;
default:
LOG_E(RRC, "[gNB %ld] In rrc_gNB_generate_pcch_msg: ns error (ns %ld)\n",
instance, sib1->servingCellConfigCommon->downlinkConfigCommon.pcch_Config.ns);
return (-1);
}
/* insert data to UE_PF_PO or update data in UE_PF_PO */
pthread_mutex_lock(&ue_pf_po_mutex);
uint8_t i = 0;
for (i = 0; i < MAX_MOBILES_PER_ENB; i++) {
if ((UE_PF_PO[CC_id][i].enable_flag == true && UE_PF_PO[CC_id][i].ue_index_value == (uint16_t)(tmsi%1024))
|| (UE_PF_PO[CC_id][i].enable_flag != true)) {
/* set T = min(Tc,Tue) */
UE_PF_PO[CC_id][i].T = T;
/* set UE_ID */
UE_PF_PO[CC_id][i].ue_index_value = (uint16_t)(tmsi%1024);
/* calculate PF and PO */
/* set PF_min and PF_offset: (SFN + PF_offset) mod T = (T div N)*(UE_ID mod N) */
UE_PF_PO[CC_id][i].PF_min = (T / N) * (UE_PF_PO[CC_id][i].ue_index_value % N);
UE_PF_PO[CC_id][i].PF_offset = pfoffset;
/* set i_s */
/* i_s = floor(UE_ID/N) mod Ns */
i_s = (uint8_t)((UE_PF_PO[CC_id][i].ue_index_value / N) % Ns);
UE_PF_PO[CC_id][i].i_s = i_s;
// TODO,set PO
if (UE_PF_PO[CC_id][i].enable_flag == true) {
//paging exist UE log
LOG_D(NR_RRC,"[gNB %ld] CC_id %d In rrc_gNB_generate_pcch_msg: Update exist UE %d, T %d, N %d, PF %d, i_s %d, PF_offset %d\n", instance, CC_id, UE_PF_PO[CC_id][i].ue_index_value,
T, N, UE_PF_PO[CC_id][i].PF_min, UE_PF_PO[CC_id][i].i_s, UE_PF_PO[CC_id][i].PF_offset);
} else {
/* set enable_flag */
UE_PF_PO[CC_id][i].enable_flag = true;
//paging new UE log
LOG_D(NR_RRC,"[gNB %ld] CC_id %d In rrc_gNB_generate_pcch_msg: Insert a new UE %d, T %d, N %d, PF %d, i_s %d, PF_offset %d\n", instance, CC_id, UE_PF_PO[CC_id][i].ue_index_value,
T, N, UE_PF_PO[CC_id][i].PF_min, UE_PF_PO[CC_id][i].i_s, UE_PF_PO[CC_id][i].PF_offset);
}
break;
}
}
pthread_mutex_unlock(&ue_pf_po_mutex);
/* Create message for PDCP (DLInformationTransfer_t) */
length = do_NR_Paging (instance,
buffer,
tmsi);
if (length == -1) {
LOG_I(NR_RRC, "do_Paging error\n");
return -1;
}
// TODO, send message to pdcp
return 0;
}
void nr_rrc_trigger(protocol_ctxt_t *ctxt, int CC_id, int frame, int subframe)
{
MessageDef *message_p;
message_p = itti_alloc_new_message(TASK_RRC_GNB, 0, RRC_SUBFRAME_PROCESS);
RRC_SUBFRAME_PROCESS(message_p).ctxt = *ctxt;
RRC_SUBFRAME_PROCESS(message_p).CC_id = CC_id;
LOG_D(NR_RRC, "Time in RRC: %u/ %u \n", frame, subframe);
itti_send_msg_to_task(TASK_RRC_GNB, ctxt->module_id, message_p);
}
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