Robert Schmidt
474c3507f1
Previous to this commit, the CU creates an F1 instance and initializes GTP after a successful connection establishment, and tears the F1 instance down after the DU disconnects. This does not work when trying to connect multiple DUs, or have them reconnect, as e.g., GTP re-initialization fails (socket already bound). This commit makes the CU F1 instance creation and GTP init at CU task init (only once), and also frees the F1 instance only after the CU task exits, which is at termination of the application, typically.
233 lines
9.7 KiB
C
233 lines
9.7 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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/*! \file openair2/F1AP/f1ap_cu_task.c
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* \brief data structures for F1 interface modules
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* \author EURECOM/NTUST
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* \date 2018
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* \version 0.1
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* \company Eurecom
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* \email: navid.nikaein@eurecom.fr, raymond.knopp@eurecom.fr, bing-kai.hong@eurecom.fr
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* \note
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* \warning
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*/
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#include "f1ap_common.h"
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#include "f1ap_cu_interface_management.h"
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#include "f1ap_cu_rrc_message_transfer.h"
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#include "f1ap_cu_ue_context_management.h"
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#include "f1ap_cu_paging.h"
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#include "f1ap_cu_task.h"
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#include <openair3/ocp-gtpu/gtp_itf.h>
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//Fixme: Uniq dirty DU instance, by global var, datamodel need better management
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instance_t CUuniqInstance=0;
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static instance_t cu_task_create_gtpu_instance(eth_params_t *IPaddrs) {
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openAddr_t tmp= {0};
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strncpy(tmp.originHost, IPaddrs->my_addr, sizeof(tmp.originHost)-1);
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sprintf(tmp.originService, "%d", IPaddrs->my_portd);
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sprintf(tmp.destinationService, "%d", IPaddrs->remote_portd);
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return gtpv1Init(tmp);
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}
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static void cu_task_handle_sctp_association_ind(instance_t instance,
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sctp_new_association_ind_t *sctp_new_association_ind,
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eth_params_t *IPaddrs)
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{
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// save the assoc id
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f1ap_cudu_inst_t *f1ap_cu_data = getCxt(instance);
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f1ap_cu_data->assoc_id = sctp_new_association_ind->assoc_id;
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f1ap_cu_data->sctp_in_streams = sctp_new_association_ind->in_streams;
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f1ap_cu_data->sctp_out_streams = sctp_new_association_ind->out_streams;
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}
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static void cu_task_handle_sctp_association_resp(instance_t instance, sctp_new_association_resp_t *sctp_new_association_resp) {
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DevAssert(sctp_new_association_resp != NULL);
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if (sctp_new_association_resp->sctp_state == SCTP_STATE_SHUTDOWN) {
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f1ap_cudu_inst_t *f1ap_cu_data = getCxt(instance);
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AssertFatal(f1ap_cu_data != NULL, "illegal state: SCTP shutdown for non-existing F1AP endpoint\n");
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LOG_I(F1AP, "Received SCTP shutdown for assoc_id %d, removing endpoint\n", sctp_new_association_resp->assoc_id);
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/* inform RRC that the DU is gone */
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MessageDef *message_p = itti_alloc_new_message(TASK_CU_F1, 0, F1AP_LOST_CONNECTION);
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message_p->ittiMsgHeader.originInstance = sctp_new_association_resp->assoc_id;
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itti_send_msg_to_task(TASK_RRC_GNB, instance, message_p);
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return;
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}
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if (sctp_new_association_resp->sctp_state != SCTP_STATE_ESTABLISHED) {
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LOG_W(F1AP, "Received unsuccessful result for SCTP association (%u), instance %ld, cnx_id %u\n",
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sctp_new_association_resp->sctp_state,
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instance,
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sctp_new_association_resp->ulp_cnx_id);
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//if (sctp_new_association_resp->sctp_state == SCTP_STATE_SHUTDOWN)
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//proto_agent_stop(instance);
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//f1ap_handle_setup_message(instance, sctp_new_association_resp->sctp_state == SCTP_STATE_SHUTDOWN);
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return; // exit -1 for debugging
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}
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}
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static void cu_task_handle_sctp_data_ind(instance_t instance, sctp_data_ind_t *sctp_data_ind) {
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int result;
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DevAssert(sctp_data_ind != NULL);
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f1ap_handle_message(instance, sctp_data_ind->assoc_id, sctp_data_ind->stream,
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sctp_data_ind->buffer, sctp_data_ind->buffer_length);
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result = itti_free(TASK_UNKNOWN, sctp_data_ind->buffer);
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AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
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}
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static void cu_task_send_sctp_init_req(instance_t instance, char *my_addr) {
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// 1. get the itti msg, and retrive the nb_id from the message
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// 2. use RC.rrc[nb_id] to fill the sctp_init_t with the ip, port
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// 3. creat an itti message to init
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LOG_I(F1AP, "F1AP_CU_SCTP_REQ(create socket)\n");
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MessageDef *message_p = NULL;
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message_p = itti_alloc_new_message (TASK_CU_F1, 0, SCTP_INIT_MSG);
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message_p->ittiMsg.sctp_init.port = F1AP_PORT_NUMBER;
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message_p->ittiMsg.sctp_init.ppid = F1AP_SCTP_PPID;
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message_p->ittiMsg.sctp_init.ipv4 = 1;
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message_p->ittiMsg.sctp_init.ipv6 = 0;
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message_p->ittiMsg.sctp_init.nb_ipv4_addr = 1;
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message_p->ittiMsg.sctp_init.ipv4_address[0] = inet_addr(my_addr);
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/*
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* SR WARNING: ipv6 multi-homing fails sometimes for localhost.
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* * * * Disable it for now.
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*/
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message_p->ittiMsg.sctp_init.nb_ipv6_addr = 0;
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message_p->ittiMsg.sctp_init.ipv6_address[0] = "0:0:0:0:0:0:0:1";
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itti_send_msg_to_task(TASK_SCTP, instance, message_p);
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}
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void *F1AP_CU_task(void *arg) {
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MessageDef *received_msg = NULL;
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int result;
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LOG_I(F1AP, "Starting F1AP at CU\n");
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// no RLC in CU, initialize mem pool for PDCP
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pool_buffer_init();
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itti_mark_task_ready(TASK_CU_F1);
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eth_params_t *IPaddrs;
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// Hardcoded instance id!
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IPaddrs = &RC.nrrrc[0]->eth_params_s;
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const int instance = 0;
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createF1inst(instance, NULL, NULL);
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cu_task_send_sctp_init_req(instance, IPaddrs->my_addr);
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if (RC.nrrrc[instance]->node_type != ngran_gNB_CUCP) {
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getCxt(instance)->gtpInst = cu_task_create_gtpu_instance(IPaddrs);
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AssertFatal(getCxt(instance)->gtpInst > 0, "Failed to create CU F1-U UDP listener");
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} else {
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LOG_I(F1AP, "In F1AP connection, don't start GTP-U, as we have also E1AP\n");
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}
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// Fixme: fully inconsistent instances management
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// dirty global var is a bad fix
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CUuniqInstance=getCxt(instance)->gtpInst;
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while (1) {
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itti_receive_msg(TASK_CU_F1, &received_msg);
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LOG_D(F1AP, "CU Task Received %s for instance %ld\n",
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ITTI_MSG_NAME(received_msg), ITTI_MSG_DESTINATION_INSTANCE(received_msg));
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switch (ITTI_MSG_ID(received_msg)) {
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case SCTP_NEW_ASSOCIATION_IND:
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cu_task_handle_sctp_association_ind(ITTI_MSG_ORIGIN_INSTANCE(received_msg),
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&received_msg->ittiMsg.sctp_new_association_ind,
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IPaddrs);
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break;
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case SCTP_NEW_ASSOCIATION_RESP:
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cu_task_handle_sctp_association_resp(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
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&received_msg->ittiMsg.sctp_new_association_resp);
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break;
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case SCTP_DATA_IND:
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cu_task_handle_sctp_data_ind(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
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&received_msg->ittiMsg.sctp_data_ind);
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break;
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case F1AP_SETUP_RESP: // from rrc
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CU_send_F1_SETUP_RESPONSE(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
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&F1AP_SETUP_RESP(received_msg));
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break;
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case F1AP_GNB_CU_CONFIGURATION_UPDATE: // from rrc
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CU_send_gNB_CU_CONFIGURATION_UPDATE(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
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&F1AP_GNB_CU_CONFIGURATION_UPDATE(received_msg));
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break;
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case F1AP_DL_RRC_MESSAGE: // from rrc
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CU_send_DL_RRC_MESSAGE_TRANSFER(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
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&F1AP_DL_RRC_MESSAGE(received_msg));
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free(F1AP_DL_RRC_MESSAGE(received_msg).rrc_container);
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break;
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case F1AP_UE_CONTEXT_SETUP_REQ: // from rrc
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CU_send_UE_CONTEXT_SETUP_REQUEST(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
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&F1AP_UE_CONTEXT_SETUP_REQ(received_msg));
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break;
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case F1AP_UE_CONTEXT_MODIFICATION_REQ:
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CU_send_UE_CONTEXT_MODIFICATION_REQUEST(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
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&F1AP_UE_CONTEXT_MODIFICATION_REQ(received_msg));
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break;
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case F1AP_UE_CONTEXT_RELEASE_CMD: // from rrc
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CU_send_UE_CONTEXT_RELEASE_COMMAND(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
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&F1AP_UE_CONTEXT_RELEASE_CMD(received_msg));
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break;
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case F1AP_PAGING_IND:
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CU_send_Paging(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
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&F1AP_PAGING_IND(received_msg));
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break;
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case F1AP_UE_CONTEXT_MODIFICATION_CONFIRM:
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CU_send_UE_CONTEXT_MODIFICATION_CONFIRM(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
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&F1AP_UE_CONTEXT_MODIFICATION_CONFIRM(received_msg));
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break;
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case F1AP_UE_CONTEXT_MODIFICATION_REFUSE:
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CU_send_UE_CONTEXT_MODIFICATION_REFUSE(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
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&F1AP_UE_CONTEXT_MODIFICATION_REFUSE(received_msg));
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break;
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case TERMINATE_MESSAGE:
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LOG_W(F1AP, " *** Exiting F1AP thread\n");
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itti_exit_task();
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break;
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default:
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LOG_E(F1AP, "CU Received unhandled message: %d:%s\n",
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ITTI_MSG_ID(received_msg), ITTI_MSG_NAME(received_msg));
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break;
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} // switch
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result = itti_free (ITTI_MSG_ORIGIN_ID(received_msg), received_msg);
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AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
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received_msg = NULL;
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} // while
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destroyF1inst(instance);
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return NULL;
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}
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