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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 openair2/F1AP/f1ap_cu_task.c
* \brief data structures for F1 interface modules
* \author EURECOM/NTUST
* \date 2018
* \version 0.1
* \company Eurecom
* \email: navid.nikaein@eurecom.fr, raymond.knopp@eurecom.fr, bing-kai.hong@eurecom.fr
* \note
* \warning
*/
#include "f1ap_common.h"
#include "f1ap_cu_interface_management.h"
#include "f1ap_cu_rrc_message_transfer.h"
#include "f1ap_cu_ue_context_management.h"
#include "f1ap_cu_paging.h"
#include "f1ap_cu_task.h"
#include <openair3/ocp-gtpu/gtp_itf.h>
//Fixme: Uniq dirty DU instance, by global var, datamodel need better management
instance_t CUuniqInstance=0;
static instance_t cu_task_create_gtpu_instance(eth_params_t *IPaddrs) {
openAddr_t tmp= {0};
strncpy(tmp.originHost, IPaddrs->my_addr, sizeof(tmp.originHost)-1);
sprintf(tmp.originService, "%d", IPaddrs->my_portd);
return gtpv1Init(tmp);
}
static void cu_task_handle_sctp_association_ind(instance_t instance, sctp_new_association_ind_t *sctp_new_association_ind,
eth_params_t *IPaddrs) {
createF1inst(true, instance, NULL);
// save the assoc id
f1ap_setup_req_t *f1ap_cu_data=f1ap_req(true, instance);
f1ap_cu_data->assoc_id = sctp_new_association_ind->assoc_id;
f1ap_cu_data->sctp_in_streams = sctp_new_association_ind->in_streams;
f1ap_cu_data->sctp_out_streams = sctp_new_association_ind->out_streams;
f1ap_cu_data->default_sctp_stream_id = 0;
if (RC.nrrrc[instance]->node_type != ngran_gNB_CUCP) {
getCxt(CUtype, instance)->gtpInst = cu_task_create_gtpu_instance(IPaddrs);
AssertFatal(getCxt(CUtype, instance)->gtpInst > 0, "Failed to create CU F1-U UDP listener");
} else
LOG_I(F1AP, "In F1AP connection, don't start GTP-U, as we have also E1AP\n");
// Fixme: fully inconsistent instances management
// dirty global var is a bad fix
CUuniqInstance=getCxt(CUtype, instance)->gtpInst;
}
static void cu_task_handle_sctp_association_resp(instance_t instance, sctp_new_association_resp_t *sctp_new_association_resp) {
DevAssert(sctp_new_association_resp != NULL);
if (sctp_new_association_resp->sctp_state != SCTP_STATE_ESTABLISHED) {
LOG_W(F1AP, "Received unsuccessful result for SCTP association (%u), instance %ld, cnx_id %u\n",
sctp_new_association_resp->sctp_state,
instance,
sctp_new_association_resp->ulp_cnx_id);
//if (sctp_new_association_resp->sctp_state == SCTP_STATE_SHUTDOWN)
//proto_agent_stop(instance);
//f1ap_handle_setup_message(instance, sctp_new_association_resp->sctp_state == SCTP_STATE_SHUTDOWN);
return; // exit -1 for debugging
}
}
static void cu_task_handle_sctp_data_ind(instance_t instance, sctp_data_ind_t *sctp_data_ind) {
int result;
DevAssert(sctp_data_ind != NULL);
f1ap_handle_message(instance, sctp_data_ind->assoc_id, sctp_data_ind->stream,
sctp_data_ind->buffer, sctp_data_ind->buffer_length);
result = itti_free(TASK_UNKNOWN, sctp_data_ind->buffer);
AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
}
static void cu_task_send_sctp_init_req(instance_t instance, char *my_addr) {
// 1. get the itti msg, and retrive the nb_id from the message
// 2. use RC.rrc[nb_id] to fill the sctp_init_t with the ip, port
// 3. creat an itti message to init
LOG_I(F1AP, "F1AP_CU_SCTP_REQ(create socket)\n");
MessageDef *message_p = NULL;
message_p = itti_alloc_new_message (TASK_CU_F1, 0, SCTP_INIT_MSG);
message_p->ittiMsg.sctp_init.port = F1AP_PORT_NUMBER;
message_p->ittiMsg.sctp_init.ppid = F1AP_SCTP_PPID;
message_p->ittiMsg.sctp_init.ipv4 = 1;
message_p->ittiMsg.sctp_init.ipv6 = 0;
message_p->ittiMsg.sctp_init.nb_ipv4_addr = 1;
message_p->ittiMsg.sctp_init.ipv4_address[0] = inet_addr(my_addr);
/*
* SR WARNING: ipv6 multi-homing fails sometimes for localhost.
* * * * Disable it for now.
*/
message_p->ittiMsg.sctp_init.nb_ipv6_addr = 0;
message_p->ittiMsg.sctp_init.ipv6_address[0] = "0:0:0:0:0:0:0:1";
itti_send_msg_to_task(TASK_SCTP, instance, message_p);
}
void *F1AP_CU_task(void *arg) {
MessageDef *received_msg = NULL;
int result;
LOG_I(F1AP, "Starting F1AP at CU\n");
// no RLC in CU, initialize mem pool for PDCP
pool_buffer_init();
itti_mark_task_ready(TASK_CU_F1);
eth_params_t *IPaddrs;
// Hardcoded instance id!
IPaddrs = &RC.nrrrc[0]->eth_params_s;
cu_task_send_sctp_init_req(0, IPaddrs->my_addr);
while (1) {
itti_receive_msg(TASK_CU_F1, &received_msg);
LOG_D(F1AP, "CU Task Received %s for instance %ld\n",
ITTI_MSG_NAME(received_msg), ITTI_MSG_DESTINATION_INSTANCE(received_msg));
switch (ITTI_MSG_ID(received_msg)) {
case SCTP_NEW_ASSOCIATION_IND:
cu_task_handle_sctp_association_ind(ITTI_MSG_ORIGIN_INSTANCE(received_msg),
&received_msg->ittiMsg.sctp_new_association_ind,
IPaddrs);
break;
case SCTP_NEW_ASSOCIATION_RESP:
cu_task_handle_sctp_association_resp(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&received_msg->ittiMsg.sctp_new_association_resp);
break;
case SCTP_DATA_IND:
cu_task_handle_sctp_data_ind(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&received_msg->ittiMsg.sctp_data_ind);
break;
case F1AP_SETUP_RESP: // from rrc
CU_send_F1_SETUP_RESPONSE(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&F1AP_SETUP_RESP(received_msg));
break;
case F1AP_GNB_CU_CONFIGURATION_UPDATE: // from rrc
CU_send_gNB_CU_CONFIGURATION_UPDATE(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&F1AP_GNB_CU_CONFIGURATION_UPDATE(received_msg));
break;
case F1AP_DL_RRC_MESSAGE: // from rrc
CU_send_DL_RRC_MESSAGE_TRANSFER(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&F1AP_DL_RRC_MESSAGE(received_msg));
free(F1AP_DL_RRC_MESSAGE(received_msg).rrc_container);
break;
case F1AP_UE_CONTEXT_SETUP_REQ: // from rrc
CU_send_UE_CONTEXT_SETUP_REQUEST(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&F1AP_UE_CONTEXT_SETUP_REQ(received_msg));
break;
case F1AP_UE_CONTEXT_MODIFICATION_REQ:
CU_send_UE_CONTEXT_MODIFICATION_REQUEST(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&F1AP_UE_CONTEXT_MODIFICATION_REQ(received_msg));
break;
case F1AP_UE_CONTEXT_RELEASE_CMD: // from rrc
CU_send_UE_CONTEXT_RELEASE_COMMAND(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&F1AP_UE_CONTEXT_RELEASE_CMD(received_msg));
break;
case F1AP_PAGING_IND:
CU_send_Paging(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&F1AP_PAGING_IND(received_msg));
break;
case F1AP_UE_CONTEXT_MODIFICATION_CONFIRM:
CU_send_UE_CONTEXT_MODIFICATION_CONFIRM(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&F1AP_UE_CONTEXT_MODIFICATION_CONFIRM(received_msg));
break;
case F1AP_UE_CONTEXT_MODIFICATION_REFUSE:
CU_send_UE_CONTEXT_MODIFICATION_REFUSE(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&F1AP_UE_CONTEXT_MODIFICATION_REFUSE(received_msg));
break;
// case F1AP_SETUP_RESPONSE: // This is from RRC
// CU_send_F1_SETUP_RESPONSE(instance, *f1ap_setup_ind, &(F1AP_SETUP_RESP) f1ap_setup_resp)
// break;
// case F1AP_SETUP_FAILURE: // This is from RRC
// CU_send_F1_SETUP_FAILURE(instance, *f1ap_setup_ind, &(F1AP_SETUP_FAILURE) f1ap_setup_failure)
// break;
case TERMINATE_MESSAGE:
LOG_W(F1AP, " *** Exiting F1AP thread\n");
itti_exit_task();
break;
default:
LOG_E(F1AP, "CU Received unhandled message: %d:%s\n",
ITTI_MSG_ID(received_msg), ITTI_MSG_NAME(received_msg));
break;
} // switch
result = itti_free (ITTI_MSG_ORIGIN_ID(received_msg), received_msg);
AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
received_msg = NULL;
} // while
return NULL;
}