/*
* 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.
*-------------------------------------------------------------------------------
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*/
/*! \file f1ap_cu_rrc_message_transfer.c
* \brief f1ap rrc message transfer for CU
* \author EURECOM/NTUST
* \date 2018
* \version 0.1
* \company Eurecom
* \email: navid.nikaein@eurecom.fr, bing-kai.hong@eurecom.fr
* \note
* \warning
*/
#include "f1ap_common.h"
#include "f1ap_encoder.h"
#include "f1ap_decoder.h"
#include "f1ap_itti_messaging.h"
#include "f1ap_cu_rrc_message_transfer.h"
#include "common/ran_context.h"
#include "openair3/UTILS/conversions.h"
// undefine C_RNTI from
// openair1/PHY/LTE_TRANSPORT/transport_common.h which
// replaces in ie->value.choice.C_RNTI, causing
// a compile error
#undef C_RNTI
// Bing Kai: create CU and DU context, and put all the information there.
uint64_t du_ue_f1ap_id = 0;
uint32_t f1ap_assoc_id = 0;
uint32_t f1ap_stream = 0;
extern f1ap_cudu_inst_t f1ap_cu_inst[MAX_eNB];
/*
Initial UL RRC Message Transfer
*/
extern RAN_CONTEXT_t RC;
int CU_handle_INITIAL_UL_RRC_MESSAGE_TRANSFER(instance_t instance,
uint32_t assoc_id,
uint32_t stream,
F1AP_F1AP_PDU_t *pdu) {
LOG_D(F1AP, "CU_handle_INITIAL_UL_RRC_MESSAGE_TRANSFER\n");
// decode the F1 message
// get the rrc message from the contauiner
// call func rrc_eNB_decode_ccch: <-- needs some update here
MessageDef *message_p;
F1AP_InitialULRRCMessageTransfer_t *container;
F1AP_InitialULRRCMessageTransferIEs_t *ie;
rnti_t rnti;
sdu_size_t ccch_sdu_len;
int CC_id =0;
DevAssert(pdu != NULL);
if (stream != 0) {
LOG_E(F1AP, "[SCTP %d] Received F1 on stream != 0 (%d)\n",
assoc_id, stream);
return -1;
}
// TODO: use context
f1ap_stream = stream;
f1ap_assoc_id = assoc_id;
container = &pdu->choice.initiatingMessage->value.choice.InitialULRRCMessageTransfer;
/* GNB_DU_UE_F1AP_ID */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_InitialULRRCMessageTransferIEs_t, ie, container,
F1AP_ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID, true);
du_ue_f1ap_id = ie->value.choice.GNB_DU_UE_F1AP_ID;
LOG_D(F1AP, "du_ue_f1ap_id %lu \n", du_ue_f1ap_id);
/* NRCGI
* TODO: process NRCGI
*/
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_InitialULRRCMessageTransferIEs_t, ie, container,
F1AP_ProtocolIE_ID_id_NRCGI, true);
uint64_t nr_cellid;
BIT_STRING_TO_NR_CELL_IDENTITY(&ie->value.choice.NRCGI.nRCellIdentity,nr_cellid);
/* RNTI */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_InitialULRRCMessageTransferIEs_t, ie, container,
F1AP_ProtocolIE_ID_id_C_RNTI, true);
rnti = ie->value.choice.C_RNTI;
/* RRC Container */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_InitialULRRCMessageTransferIEs_t, ie, container,
F1AP_ProtocolIE_ID_id_RRCContainer, true);
AssertFatal(ie!=NULL,"RRCContainer is missing\n");
// create an ITTI message and copy SDU
if (RC.nrrrc && RC.nrrrc[GNB_INSTANCE_TO_MODULE_ID(instance)]->node_type == ngran_gNB_CU) {
message_p = itti_alloc_new_message (TASK_CU_F1, 0, NR_RRC_MAC_CCCH_DATA_IND);
memset (NR_RRC_MAC_CCCH_DATA_IND (message_p).sdu, 0, CCCH_SDU_SIZE);
ccch_sdu_len = ie->value.choice.RRCContainer.size;
memcpy(NR_RRC_MAC_CCCH_DATA_IND (message_p).sdu, ie->value.choice.RRCContainer.buf,
ccch_sdu_len);
} else {
message_p = itti_alloc_new_message (TASK_CU_F1, 0, RRC_MAC_CCCH_DATA_IND);
memset (RRC_MAC_CCCH_DATA_IND (message_p).sdu, 0, CCCH_SDU_SIZE);
ccch_sdu_len = ie->value.choice.RRCContainer.size;
memcpy(RRC_MAC_CCCH_DATA_IND (message_p).sdu, ie->value.choice.RRCContainer.buf,
ccch_sdu_len);
}
LOG_I(F1AP, "%s() RRCContainer (CCCH) size %ld: ", __func__,
ie->value.choice.RRCContainer.size);
for (int i = 0; i < ie->value.choice.RRCContainer.size; i++)
printf("%02x ", RRC_MAC_CCCH_DATA_IND (message_p).sdu[i]);
printf("\n");
if (RC.nrrrc && RC.nrrrc[GNB_INSTANCE_TO_MODULE_ID(instance)]->node_type == ngran_gNB_CU) {
/* DUtoCURRCContainer */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_InitialULRRCMessageTransferIEs_t, ie, container,
F1AP_ProtocolIE_ID_id_DUtoCURRCContainer, true);
if (ie) {
NR_RRC_MAC_CCCH_DATA_IND (message_p).du_to_cu_rrc_container = malloc(sizeof(OCTET_STRING_t));
NR_RRC_MAC_CCCH_DATA_IND (message_p).du_to_cu_rrc_container->size = ie->value.choice.DUtoCURRCContainer.size;
NR_RRC_MAC_CCCH_DATA_IND (message_p).du_to_cu_rrc_container->buf = malloc(
ie->value.choice.DUtoCURRCContainer.size);
memcpy(NR_RRC_MAC_CCCH_DATA_IND (message_p).du_to_cu_rrc_container->buf,
ie->value.choice.DUtoCURRCContainer.buf,
ie->value.choice.DUtoCURRCContainer.size);
}
}
// Find instance from nr_cellid
int rrc_inst = -1;
if (RC.nrrrc && RC.nrrrc[GNB_INSTANCE_TO_MODULE_ID(instance)]->node_type == ngran_gNB_CU) {
for (int i=0;i<RC.nb_nr_inst;i++) {
// first get RRC instance (note, no the ITTI instance)
gNB_RRC_INST *rrc = RC.nrrrc[i];
if (rrc->nr_cellid == nr_cellid) {
rrc_inst = i;
break;
}
}
} else {
for (int i=0;i<RC.nb_inst;i++) {
// first get RRC instance (note, no the ITTI instance)
eNB_RRC_INST *rrc = RC.rrc[i];
if (rrc->nr_cellid == nr_cellid) {
rrc_inst = i;
break;
}
}
}
AssertFatal(rrc_inst>=0,"couldn't find an RRC instance for nr_cell %llu\n",(unsigned long long int)nr_cellid);
int f1ap_uid = f1ap_add_ue(&f1ap_cu_inst[rrc_inst], rrc_inst, CC_id, 0, rnti);
if (f1ap_uid < 0 ) {
LOG_E(F1AP, "Failed to add UE \n");
itti_free(ITTI_MSG_ORIGIN_ID(message_p), message_p);
return -1;
}
f1ap_cu_inst[rrc_inst].f1ap_ue[f1ap_uid].du_ue_f1ap_id = du_ue_f1ap_id;
if (RC.nrrrc && RC.nrrrc[GNB_INSTANCE_TO_MODULE_ID(instance)]->node_type == ngran_gNB_CU) {
NR_RRC_MAC_CCCH_DATA_IND (message_p).frame = 0;
NR_RRC_MAC_CCCH_DATA_IND (message_p).sub_frame = 0;
NR_RRC_MAC_CCCH_DATA_IND (message_p).sdu_size = ccch_sdu_len;
NR_RRC_MAC_CCCH_DATA_IND (message_p).gnb_index = rrc_inst; // CU instance
NR_RRC_MAC_CCCH_DATA_IND (message_p).rnti = rnti;
NR_RRC_MAC_CCCH_DATA_IND (message_p).CC_id = CC_id;
itti_send_msg_to_task (TASK_RRC_GNB, instance, message_p);
} else {
RRC_MAC_CCCH_DATA_IND (message_p).frame = 0;
RRC_MAC_CCCH_DATA_IND (message_p).sub_frame = 0;
RRC_MAC_CCCH_DATA_IND (message_p).sdu_size = ccch_sdu_len;
RRC_MAC_CCCH_DATA_IND (message_p).enb_index = rrc_inst; // CU instance
RRC_MAC_CCCH_DATA_IND (message_p).rnti = rnti;
RRC_MAC_CCCH_DATA_IND (message_p).CC_id = CC_id;
itti_send_msg_to_task (TASK_RRC_ENB, instance, message_p);
}
return 0;
}
/*
DL RRC Message Transfer.
*/
//void CU_send_DL_RRC_MESSAGE_TRANSFER(F1AP_DLRRCMessageTransfer_t *DLRRCMessageTransfer) {
int CU_send_DL_RRC_MESSAGE_TRANSFER(instance_t instance,
f1ap_dl_rrc_message_t *f1ap_dl_rrc)
{
LOG_D(F1AP, "CU send DL_RRC_MESSAGE_TRANSFER \n");
F1AP_F1AP_PDU_t pdu;
F1AP_DLRRCMessageTransfer_t *out;
F1AP_DLRRCMessageTransferIEs_t *ie;
uint8_t *buffer;
uint32_t len;
/* Create */
/* 0. Message Type */
memset(&pdu, 0, sizeof(pdu));
pdu.present = F1AP_F1AP_PDU_PR_initiatingMessage;
pdu.choice.initiatingMessage = (F1AP_InitiatingMessage_t *)calloc(1, sizeof(F1AP_InitiatingMessage_t));
pdu.choice.initiatingMessage->procedureCode = F1AP_ProcedureCode_id_DLRRCMessageTransfer;
pdu.choice.initiatingMessage->criticality = F1AP_Criticality_ignore;
pdu.choice.initiatingMessage->value.present = F1AP_InitiatingMessage__value_PR_DLRRCMessageTransfer;
out = &pdu.choice.initiatingMessage->value.choice.DLRRCMessageTransfer;
/* mandatory */
/* c1. GNB_CU_UE_F1AP_ID */
ie = (F1AP_DLRRCMessageTransferIEs_t *)calloc(1, sizeof(F1AP_DLRRCMessageTransferIEs_t));
ie->id = F1AP_ProtocolIE_ID_id_gNB_CU_UE_F1AP_ID;
ie->criticality = F1AP_Criticality_reject;
ie->value.present = F1AP_DLRRCMessageTransferIEs__value_PR_GNB_CU_UE_F1AP_ID;
ie->value.choice.GNB_CU_UE_F1AP_ID = f1ap_get_cu_ue_f1ap_id(&f1ap_cu_inst[instance], f1ap_dl_rrc->rnti);
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
LOG_I(F1AP, "Setting GNB_CU_UE_F1AP_ID %llu associated with UE RNTI %x (instance %ld)\n",
(unsigned long long int)ie->value.choice.GNB_CU_UE_F1AP_ID, f1ap_dl_rrc->rnti, instance);
/* mandatory */
/* c2. GNB_DU_UE_F1AP_ID */
ie = (F1AP_DLRRCMessageTransferIEs_t *)calloc(1, sizeof(F1AP_DLRRCMessageTransferIEs_t));
ie->id = F1AP_ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID;
ie->criticality = F1AP_Criticality_reject;
ie->value.present = F1AP_DLRRCMessageTransferIEs__value_PR_GNB_DU_UE_F1AP_ID;
ie->value.choice.GNB_DU_UE_F1AP_ID = f1ap_get_du_ue_f1ap_id(&f1ap_cu_inst[instance], f1ap_dl_rrc->rnti);
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
LOG_I(F1AP, "GNB_DU_UE_F1AP_ID %llu associated with UE RNTI %x \n", (unsigned long long int)ie->value.choice.GNB_DU_UE_F1AP_ID, f1ap_dl_rrc->rnti);
/* optional */
/* c3. oldgNB_DU_UE_F1AP_ID */
/* if (f1ap_dl_rrc->old_gNB_DU_ue_id != 0xFFFFFFFF) {
ie = (F1AP_DLRRCMessageTransferIEs_t *)calloc(1, sizeof(F1AP_DLRRCMessageTransferIEs_t));
ie->id = F1AP_ProtocolIE_ID_id_oldgNB_DU_UE_F1AP_ID;
ie->criticality = F1AP_Criticality_reject;
ie->value.present = F1AP_DLRRCMessageTransferIEs__value_PR_NOTHING;
ie->value.choice.oldgNB_DU_UE_F1AP_ID = f1ap_dl_rrc->old_gNB_DU_ue_id;
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
}*/
/* mandatory */
/* c4. SRBID */
ie = (F1AP_DLRRCMessageTransferIEs_t *)calloc(1, sizeof(F1AP_DLRRCMessageTransferIEs_t));
ie->id = F1AP_ProtocolIE_ID_id_SRBID;
ie->criticality = F1AP_Criticality_reject;
ie->value.present = F1AP_DLRRCMessageTransferIEs__value_PR_SRBID;
ie->value.choice.SRBID = f1ap_dl_rrc->srb_id;
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
/* optional */
/* c5. ExecuteDuplication */
if (f1ap_dl_rrc->execute_duplication) {
ie = (F1AP_DLRRCMessageTransferIEs_t *)calloc(1, sizeof(F1AP_DLRRCMessageTransferIEs_t));
ie->id = F1AP_ProtocolIE_ID_id_ExecuteDuplication;
ie->criticality = F1AP_Criticality_ignore;
ie->value.present = F1AP_DLRRCMessageTransferIEs__value_PR_ExecuteDuplication;
ie->value.choice.ExecuteDuplication = F1AP_ExecuteDuplication_true;
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
}
// issue in here
/* mandatory */
/* c6. RRCContainer */
ie = (F1AP_DLRRCMessageTransferIEs_t *)calloc(1, sizeof(F1AP_DLRRCMessageTransferIEs_t));
ie->id = F1AP_ProtocolIE_ID_id_RRCContainer;
ie->criticality = F1AP_Criticality_reject;
ie->value.present = F1AP_DLRRCMessageTransferIEs__value_PR_RRCContainer;
OCTET_STRING_fromBuf(&ie->value.choice.RRCContainer, (const char*)f1ap_dl_rrc->rrc_container, f1ap_dl_rrc->rrc_container_length);
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
LOG_I(F1AP, "%s() RRCContainer size %d: ", __func__, f1ap_dl_rrc->rrc_container_length);
for (int i = 0; i < ie->value.choice.RRCContainer.size; i++)
printf("%02x ", f1ap_dl_rrc->rrc_container[i]);
printf("\n");
/* optional */
/* c7. RAT_FrequencyPriorityInformation */
/* TODO */
int endc=1;
ie = (F1AP_DLRRCMessageTransferIEs_t *)calloc(1, sizeof(F1AP_DLRRCMessageTransferIEs_t));
ie->id = F1AP_ProtocolIE_ID_id_RAT_FrequencyPriorityInformation;
ie->criticality = F1AP_Criticality_reject;
ie->value.present = F1AP_DLRRCMessageTransferIEs__value_PR_RAT_FrequencyPriorityInformation;
if (endc==1) {
ie->value.choice.RAT_FrequencyPriorityInformation.present = F1AP_RAT_FrequencyPriorityInformation_PR_eNDC;
ie->value.choice.RAT_FrequencyPriorityInformation.choice.eNDC = 123L;
}
else {
ie->value.choice.RAT_FrequencyPriorityInformation.present = F1AP_RAT_FrequencyPriorityInformation_PR_nGRAN;
ie->value.choice.RAT_FrequencyPriorityInformation.choice.nGRAN = 11L;
}
//ie->value.choice.RAT_FrequencyPriorityInformation.present = F1AP_RAT_FrequencyPriorityInformation_PR_rAT_FrequencySelectionPriority;
//ie->value.choice.RAT_FrequencyPriorityInformation.choice.rAT_FrequencySelectionPriority = 123L;
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
/* encode */
if (f1ap_encode_pdu(&pdu, &buffer, &len) < 0) {
LOG_E(F1AP, "Failed to encode F1 DL RRC MESSAGE TRANSFER \n");
return -1;
}
cu_f1ap_itti_send_sctp_data_req(instance, f1ap_assoc_id /* BK: fix me*/ , buffer, len, 0 /* BK: fix me*/);
return 0;
}
/*
UL RRC Message Transfer
*/
int CU_handle_UL_RRC_MESSAGE_TRANSFER(instance_t instance,
uint32_t assoc_id,
uint32_t stream,
F1AP_F1AP_PDU_t *pdu) {
LOG_D(F1AP, "CU_handle_UL_RRC_MESSAGE_TRANSFER \n");
F1AP_ULRRCMessageTransfer_t *container;
F1AP_ULRRCMessageTransferIEs_t *ie;
uint64_t cu_ue_f1ap_id;
uint64_t du_ue_f1ap_id;
uint64_t srb_id;
DevAssert(pdu != NULL);
if (stream != 0) {
LOG_E(F1AP, "[SCTP %d] Received F1 on stream != 0 (%d)\n",
assoc_id, stream);
return -1;
}
container = &pdu->choice.initiatingMessage->value.choice.ULRRCMessageTransfer;
/* GNB_CU_UE_F1AP_ID */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_ULRRCMessageTransferIEs_t, ie, container,
F1AP_ProtocolIE_ID_id_gNB_CU_UE_F1AP_ID, true);
cu_ue_f1ap_id = ie->value.choice.GNB_CU_UE_F1AP_ID;
LOG_D(F1AP, "cu_ue_f1ap_id %lu associated with RNTI %x\n", cu_ue_f1ap_id, f1ap_get_rnti_by_cu_id(&f1ap_cu_inst[instance], cu_ue_f1ap_id));
/* GNB_DU_UE_F1AP_ID */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_ULRRCMessageTransferIEs_t, ie, container,
F1AP_ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID, true);
du_ue_f1ap_id = ie->value.choice.GNB_DU_UE_F1AP_ID;
LOG_D(F1AP, "du_ue_f1ap_id %lu associated with RNTI %x\n", du_ue_f1ap_id, f1ap_get_rnti_by_cu_id(&f1ap_cu_inst[instance], du_ue_f1ap_id));
/* mandatory */
/* SRBID */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_ULRRCMessageTransferIEs_t, ie, container,
F1AP_ProtocolIE_ID_id_SRBID, true);
srb_id = ie->value.choice.SRBID;
if (srb_id < 1 )
LOG_E(F1AP, "Unexpected UL RRC MESSAGE for srb_id %lu \n", srb_id);
else
LOG_D(F1AP, "UL RRC MESSAGE for srb_id %lu in DCCH \n", srb_id);
// issue in here
/* mandatory */
/* RRC Container */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_ULRRCMessageTransferIEs_t, ie, container,
F1AP_ProtocolIE_ID_id_RRCContainer, true);
// print message in debug mode
// create an ITTI message and copy SDU
/*
message_p = itti_alloc_new_message (TASK_CU_F1, 0, RRC_DCCH_DATA_IND);
RRC_DCCH_DATA_IND (message_p).sdu_p = malloc(ie->value.choice.RRCContainer.size);
RRC_DCCH_DATA_IND (message_p).sdu_size = ie->value.choice.RRCContainer.size;
memcpy(RRC_DCCH_DATA_IND (message_p).sdu_p, ie->value.choice.RRCContainer.buf,
ie->value.choice.RRCContainer.size);
RRC_DCCH_DATA_IND (message_p).dcch_index = srb_id;
RRC_DCCH_DATA_IND (message_p).rnti = f1ap_get_rnti_by_cu_id(&f1ap_cu_inst[instance], cu_ue_f1ap_id);
RRC_DCCH_DATA_IND (message_p).module_id = instance;
RRC_DCCH_DATA_IND (message_p).eNB_index = instance; // not needed for CU
itti_send_msg_to_task(TASK_RRC_ENB, instance, message_p);
*/
protocol_ctxt_t ctxt;
ctxt.module_id = instance;
ctxt.instance = instance;
ctxt.rnti = f1ap_get_rnti_by_cu_id(&f1ap_cu_inst[instance], cu_ue_f1ap_id);
ctxt.enb_flag = 1;
ctxt.eNB_index = 0;
ctxt.configured = 1;
mem_block_t *mb = get_free_mem_block(ie->value.choice.RRCContainer.size,__func__);
memcpy((void*)mb->data,(void*)ie->value.choice.RRCContainer.buf,ie->value.choice.RRCContainer.size);
LOG_I(F1AP, "Calling pdcp_data_ind for UE RNTI %x srb_id %lu with size %ld (DCCH) \n", ctxt.rnti, srb_id, ie->value.choice.RRCContainer.size);
//LOG_I(F1AP, "%s() RRCContainer size %lu: ", __func__, ie->value.choice.RRCContainer.size);
//for (int i = 0; i < ie->value.choice.RRCContainer.size; i++)
// printf("%02x ", mb->data[i]);
//printf("\n");
pdcp_data_ind (&ctxt,
1, // srb_flag
0, // embms_flag
srb_id,
ie->value.choice.RRCContainer.size,
mb);
return 0;
}