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632ca1575269eeff60ce2bfbfd6fa1ee7e189c8d
openairinterface5g/openair2/F1AP/f1ap_cu_task.c
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Robert Schmidt 632ca15752 Separate F1 Setup Request and network configuration 
This branch series implements the usage of the F1 Setup Request
internally at the gNB, even if CU and DU run in the same process. Until
now, the F1 Setup Request contained struct fields to pass IP
configuration to the F1AP module; this information is not necessary in
monolithic, nor should it be relevant when passing the information in
F1 Setup Request.

Therefore, this commit moves all IP connection-related information out
of the F1 Setup Request and into a separate structure instead.  In order
to give the F1AP module the necessary connection information, the
DU_REGISTER_REQ message is introduced that combines the F1 Setup Request
and IP configuration, such that the F1AP module can setup the SCTP
connection and then send the F1 Setup Request message.

In a later commit, there will be a callback for F1 Setup Request at MAC
to simply register the DU at the CU. The monolithic callback will simply
forward the F1 Setup Request The F1AP callback will look up the IP
configuration and create DU_REGISTER_REQ message containing IP
configuration and F1 Setup Request, which is then handled by the F1AP
module. To this end, a separate function in gnb_config.c allows to read
IP information from configuration.
2023-09-21 12:49:20 +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 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)
{
// save the assoc id
f1ap_cudu_inst_t *f1ap_cu_data = getCxt(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;
if (RC.nrrrc[instance]->node_type != ngran_gNB_CUCP) {
getCxt(instance)->gtpInst = cu_task_create_gtpu_instance(IPaddrs);
AssertFatal(getCxt(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(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;
}
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