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openairinterface5g/openair2/F1AP/f1ap_cu_rrc_message_transfer.c
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/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file 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_ids.h"
#include "f1ap_itti_messaging.h"
#include "f1ap_cu_rrc_message_transfer.h"
#include "common/ran_context.h"
#include "openair3/UTILS/conversions.h"
#include "LAYER2/nr_pdcp/nr_pdcp_oai_api.h"
/*
Initial UL RRC Message Transfer
*/
int CU_handle_INITIAL_UL_RRC_MESSAGE_TRANSFER(instance_t instance, sctp_assoc_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;
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.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);
uint32_t du_ue_id = ie->value.choice.GNB_DU_UE_F1AP_ID;
/* NRCGI
* Fixme: 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_t rnti = ie->value.choice.C_RNTI;
F1AP_InitialULRRCMessageTransferIEs_t *rrccont;
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_InitialULRRCMessageTransferIEs_t, rrccont, container,
F1AP_ProtocolIE_ID_id_RRCContainer, true);
AssertFatal(rrccont!=NULL,"RRCContainer is missing\n");
F1AP_InitialULRRCMessageTransferIEs_t *du2cu;
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_InitialULRRCMessageTransferIEs_t, du2cu, container,
F1AP_ProtocolIE_ID_id_DUtoCURRCContainer, false);
// create an ITTI message and copy SDU
message_p = itti_alloc_new_message(TASK_CU_F1, 0, F1AP_INITIAL_UL_RRC_MESSAGE);
message_p->ittiMsgHeader.originInstance = assoc_id;
f1ap_initial_ul_rrc_message_t *ul_rrc = &F1AP_INITIAL_UL_RRC_MESSAGE(message_p);
ul_rrc->gNB_DU_ue_id = du_ue_id;
ul_rrc->nr_cellid = nr_cellid; // CU instance
ul_rrc->crnti = rnti;
ul_rrc->rrc_container_length = rrccont->value.choice.RRCContainer.size;
ul_rrc->rrc_container = malloc(ul_rrc->rrc_container_length);
memcpy(ul_rrc->rrc_container, rrccont->value.choice.RRCContainer.buf, ul_rrc->rrc_container_length);
AssertFatal(du2cu != NULL, "no masterCellGroup in initial UL RRC message\n");
ul_rrc->du2cu_rrc_container_length = du2cu->value.choice.DUtoCURRCContainer.size;
ul_rrc->du2cu_rrc_container = malloc(ul_rrc->du2cu_rrc_container_length);
memcpy(ul_rrc->du2cu_rrc_container, du2cu->value.choice.DUtoCURRCContainer.buf, ul_rrc->du2cu_rrc_container_length);
itti_send_msg_to_task(TASK_RRC_GNB, instance, message_p);
return 0;
}
/*
DL RRC Message Transfer.
*/
int CU_send_DL_RRC_MESSAGE_TRANSFER(sctp_assoc_t assoc_id, f1ap_dl_rrc_message_t *f1ap_dl_rrc)
{
LOG_D(F1AP, "CU send DL_RRC_MESSAGE_TRANSFER \n");
F1AP_F1AP_PDU_t pdu= {0};
F1AP_DLRRCMessageTransfer_t *out;
uint8_t *buffer=NULL;
uint32_t len=0;
/* Create */
/* 0. Message Type */
pdu.present = F1AP_F1AP_PDU_PR_initiatingMessage;
asn1cCalloc(pdu.choice.initiatingMessage, tmp);
tmp->procedureCode = F1AP_ProcedureCode_id_DLRRCMessageTransfer;
tmp->criticality = F1AP_Criticality_ignore;
tmp->value.present = F1AP_InitiatingMessage__value_PR_DLRRCMessageTransfer;
out = &tmp->value.choice.DLRRCMessageTransfer;
/* mandatory */
/* c1. GNB_CU_UE_F1AP_ID */
asn1cSequenceAdd(out->protocolIEs.list, F1AP_DLRRCMessageTransferIEs_t, ie1);
ie1->id = F1AP_ProtocolIE_ID_id_gNB_CU_UE_F1AP_ID;
ie1->criticality = F1AP_Criticality_reject;
ie1->value.present = F1AP_DLRRCMessageTransferIEs__value_PR_GNB_CU_UE_F1AP_ID;
DevAssert(f1ap_dl_rrc->gNB_CU_ue_id != 0);
ie1->value.choice.GNB_CU_UE_F1AP_ID = f1ap_dl_rrc->gNB_CU_ue_id;
/* mandatory */
/* c2. GNB_DU_UE_F1AP_ID */
asn1cSequenceAdd(out->protocolIEs.list, F1AP_DLRRCMessageTransferIEs_t, ie2);
ie2->id = F1AP_ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID;
ie2->criticality = F1AP_Criticality_reject;
ie2->value.present = F1AP_DLRRCMessageTransferIEs__value_PR_GNB_DU_UE_F1AP_ID;
DevAssert(f1ap_dl_rrc->gNB_DU_ue_id != 0);
ie2->value.choice.GNB_DU_UE_F1AP_ID = f1ap_dl_rrc->gNB_DU_ue_id;
/* optional */
/* c3. oldgNB_DU_UE_F1AP_ID */
if (f1ap_dl_rrc->old_gNB_DU_ue_id != NULL) {
asn1cSequenceAdd(out->protocolIEs.list, F1AP_DLRRCMessageTransferIEs_t, ie3);
ie3->id = F1AP_ProtocolIE_ID_id_oldgNB_DU_UE_F1AP_ID;
ie3->criticality = F1AP_Criticality_reject;
ie3->value.present = F1AP_DLRRCMessageTransferIEs__value_PR_GNB_DU_UE_F1AP_ID_1;
ie3->value.choice.GNB_DU_UE_F1AP_ID_1 = *f1ap_dl_rrc->old_gNB_DU_ue_id;
}
/* mandatory */
/* c4. SRBID */
asn1cSequenceAdd(out->protocolIEs.list, F1AP_DLRRCMessageTransferIEs_t, ie4);
ie4->id = F1AP_ProtocolIE_ID_id_SRBID;
ie4->criticality = F1AP_Criticality_reject;
ie4->value.present = F1AP_DLRRCMessageTransferIEs__value_PR_SRBID;
ie4->value.choice.SRBID = f1ap_dl_rrc->srb_id;
/* optional */
/* c5. ExecuteDuplication */
if (f1ap_dl_rrc->execute_duplication) {
asn1cSequenceAdd(out->protocolIEs.list, F1AP_DLRRCMessageTransferIEs_t, ie5);
ie5->id = F1AP_ProtocolIE_ID_id_ExecuteDuplication;
ie5->criticality = F1AP_Criticality_ignore;
ie5->value.present = F1AP_DLRRCMessageTransferIEs__value_PR_ExecuteDuplication;
ie5->value.choice.ExecuteDuplication = F1AP_ExecuteDuplication_true;
}
// issue in here
/* mandatory */
/* c6. RRCContainer */
asn1cSequenceAdd(out->protocolIEs.list, F1AP_DLRRCMessageTransferIEs_t, ie6);
ie6->id = F1AP_ProtocolIE_ID_id_RRCContainer;
ie6->criticality = F1AP_Criticality_reject;
ie6->value.present = F1AP_DLRRCMessageTransferIEs__value_PR_RRCContainer;
OCTET_STRING_fromBuf(&ie6->value.choice.RRCContainer,
(const char *)f1ap_dl_rrc->rrc_container, f1ap_dl_rrc->rrc_container_length);
/* optional */
/* c7. RAT_FrequencyPriorityInformation */
/* TODO */
if (0) {
int endc=1;
asn1cSequenceAdd(out->protocolIEs.list, F1AP_DLRRCMessageTransferIEs_t, ie7);
ie7->id = F1AP_ProtocolIE_ID_id_RAT_FrequencyPriorityInformation;
ie7->criticality = F1AP_Criticality_reject;
ie7->value.present = F1AP_DLRRCMessageTransferIEs__value_PR_RAT_FrequencyPriorityInformation;
if (endc==1) {
ie7->value.choice.RAT_FrequencyPriorityInformation.present = F1AP_RAT_FrequencyPriorityInformation_PR_eNDC;
ie7->value.choice.RAT_FrequencyPriorityInformation.choice.eNDC = 123L;
} else {
ie7->value.choice.RAT_FrequencyPriorityInformation.present = F1AP_RAT_FrequencyPriorityInformation_PR_nGRAN;
ie7->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;
}
/* encode */
if (f1ap_encode_pdu(&pdu, &buffer, &len) < 0) {
LOG_E(F1AP, "Failed to encode F1 DL RRC MESSAGE TRANSFER \n");
return -1;
}
f1ap_itti_send_sctp_data_req(assoc_id, buffer, len);
return 0;
}
/*
UL RRC Message Transfer
*/
int CU_handle_UL_RRC_MESSAGE_TRANSFER(instance_t instance, sctp_assoc_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;
/* 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;
if (!cu_exists_f1_ue_data(cu_ue_f1ap_id)) {
LOG_E(F1AP, "unknown CU UE ID %ld\n", cu_ue_f1ap_id);
return 1;
}
/* the RLC-PDCP does not transport the DU UE ID (yet), so we drop it here.
* For the moment, let's hope this won't become relevant; to sleep in peace,
* let's put an assert to check that it is the expected DU UE ID. */
f1_ue_data_t ue_data = cu_get_f1_ue_data(cu_ue_f1ap_id);
if (ue_data.secondary_ue != du_ue_f1ap_id) {
LOG_E(F1AP, "unexpected DU UE ID %u received, expected it to be %lu\n", ue_data.secondary_ue, du_ue_f1ap_id);
return 1;
}
/* 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);
protocol_ctxt_t ctxt={0};
ctxt.instance = instance;
ctxt.module_id = instance;
ctxt.rntiMaybeUEid = cu_ue_f1ap_id;
ctxt.enb_flag = 1;
ctxt.eNB_index = 0;
uint8_t *mb = malloc16(ie->value.choice.RRCContainer.size);
memcpy(mb, ie->value.choice.RRCContainer.buf, ie->value.choice.RRCContainer.size);
LOG_D(F1AP, "Calling pdcp_data_ind for UE RNTI %lx srb_id %lu with size %ld (DCCH) \n", ctxt.rntiMaybeUEid, srb_id, 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, NULL, NULL);
return 0;
}
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