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openairinterface5g/openair2/ENB_APP/enb_app.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
*/
/*
enb_app.c
-------------------
AUTHOR : Laurent Winckel, Sebastien ROUX, Lionel GAUTHIER, Navid Nikaein
COMPANY : EURECOM
EMAIL : Lionel.Gauthier@eurecom.fr and Navid Nikaein
*/
#include <string.h>
#include <stdio.h>
#include "enb_app.h"
#include "enb_config.h"
#include "assertions.h"
#include "common/ran_context.h"
#include "log.h"
#if defined(ENABLE_ITTI)
# include "intertask_interface.h"
# include "timer.h"
# if defined(ENABLE_USE_MME)
# define ENB_REGISTER_RETRY_DELAY 10
# include "s1ap_eNB.h"
# include "sctp_eNB_task.h"
# include "gtpv1u_eNB_task.h"
# include "nas_ue_task.h"
# include "udp_eNB_task.h"
# endif
#if defined(FLEXRAN_AGENT_SB_IF)
# include "flexran_agent.h"
#endif
#include "openair1/PHY/INIT/phy_init.h"
extern unsigned char NB_eNB_INST;
#endif
extern int emulate_rf;
extern RAN_CONTEXT_t RC;
extern void *l2l1_task(void *arg);
#if defined(ENABLE_ITTI)
/*------------------------------------------------------------------------------*/
static void create_remaining_tasks(module_id_t enb_id)
{
ngran_node_t type = RC.rrc[enb_id]->node_type;
int rc;
itti_wait_ready(1);
switch (type) {
case ngran_eNB:
case ngran_ng_eNB:
case ngran_gNB:
case ngran_eNB_CU:
case ngran_ng_eNB_CU:
case ngran_gNB_CU:
rc = itti_create_task(TASK_SCTP, sctp_eNB_task, NULL);
AssertFatal(rc >= 0, "Create task for SCTP failed\n");
rc = itti_create_task(TASK_S1AP, s1ap_eNB_task, NULL);
AssertFatal(rc >= 0, "Create task for S1AP failed\n");
if (!emulate_rf){
rc = itti_create_task(TASK_UDP, udp_eNB_task, NULL);
AssertFatal(rc >= 0, "Create task for UDP failed\n");
}
rc = itti_create_task(TASK_GTPV1_U, &gtpv1u_eNB_task, NULL);
AssertFatal(rc >= 0, "Create task for GTPV1U failed\n");
break;
default:
/* intentionally left blank */
break;
}
switch (type) {
case ngran_eNB:
case ngran_ng_eNB:
case ngran_gNB:
case ngran_eNB_DU:
case ngran_gNB_DU:
rc = itti_create_task (TASK_L2L1, l2l1_task, NULL);
AssertFatal(rc >= 0, "Create task for L2L1 failed\n");
break;
default:
/* intentioally left blank */
break;
}
itti_wait_ready(0);
}
/*------------------------------------------------------------------------------*/
static void configure_rrc(uint32_t enb_id, MessageDef **msg_p)
{
RC.rrc[enb_id] = malloc(sizeof(eNB_RRC_INST));
AssertFatal(RC.rrc[enb_id], "RRC context for eNB %d not allocated\n", enb_id);
LOG_I(ENB_APP, "%s() Creating RRC instance RC.rrc[%d]: %p\n",
__FUNCTION__, enb_id, RC.rrc[enb_id]);
memset((void *)RC.rrc[enb_id],0,sizeof(eNB_RRC_INST));
*msg_p = itti_alloc_new_message (TASK_ENB_APP, RRC_CONFIGURATION_REQ);
RCconfig_RRC(*msg_p, enb_id, RC.rrc[enb_id]);
}
/*------------------------------------------------------------------------------*/
# if defined(ENABLE_USE_MME)
static uint32_t eNB_app_register(ngran_node_t node_type,uint32_t enb_id_start, uint32_t enb_id_end)//, const Enb_properties_array_t *enb_properties)
{
uint32_t enb_id;
MessageDef *msg_p;
uint32_t register_enb_pending = 0;
for (enb_id = enb_id_start; (enb_id < enb_id_end) ; enb_id++) {
{
if (node_type == ngran_eNB_DU) { // F1AP registration
// configure F1AP here for F1C
LOG_I(ENB_APP,"ngran_eNB_DU: Allocating ITTI message for F1AP_SETUP_REQ\n");
msg_p = itti_alloc_new_message (TASK_ENB_APP, F1AP_SETUP_REQ);
RCconfig_DU_F1(msg_p, enb_id);
LOG_I(ENB_APP,"[eNB %d] eNB_app_register via F1AP for instance %d\n", enb_id, ENB_MODULE_ID_TO_INSTANCE(enb_id));
itti_send_msg_to_task (TASK_DU_F1, ENB_MODULE_ID_TO_INSTANCE(enb_id), msg_p);
// configure GTPu here for F1U
}
else { // S1AP registration
/* note: there is an implicit relationship between the data structure and the message name */
msg_p = itti_alloc_new_message (TASK_ENB_APP, S1AP_REGISTER_ENB_REQ);
RCconfig_S1(msg_p, enb_id);
if (enb_id == 0) RCconfig_gtpu();
LOG_I(ENB_APP,"default drx %d\n",((S1AP_REGISTER_ENB_REQ(msg_p)).default_drx));
LOG_I(ENB_APP,"[eNB %d] eNB_app_register via S1AP for instance %d\n", enb_id, ENB_MODULE_ID_TO_INSTANCE(enb_id));
itti_send_msg_to_task (TASK_S1AP, ENB_MODULE_ID_TO_INSTANCE(enb_id), msg_p);
}
register_enb_pending++;
}
}
return register_enb_pending;
}
# endif
#endif
/*------------------------------------------------------------------------------*/
void *eNB_app_task(void *args_p)
{
#if defined(ENABLE_ITTI)
uint32_t enb_nb = RC.nb_inst;
uint32_t enb_id_start = 0;
uint32_t enb_id_end = enb_id_start + enb_nb;
# if defined(ENABLE_USE_MME)
uint32_t register_enb_pending;
uint32_t registered_enb;
long enb_register_retry_timer_id;
# endif
uint32_t enb_id;
MessageDef *msg_p = NULL;
instance_t instance;
int result;
MessageDef *rrc_msg_p[enb_nb];
/* for no gcc warnings */
(void)instance;
int mac_has_f1[MAX_MAC_INST];
memset(mac_has_f1,0,MAX_MAC_INST*sizeof(int));
itti_mark_task_ready (TASK_ENB_APP);
LOG_I(PHY, "%s() Task ready, initialise L1/MAC/RRC structures\n", __FUNCTION__);
RCconfig_L1();
RCconfig_macrlc(mac_has_f1);
LOG_I(PHY, "%s() RC.nb_L1_inst:%d\n", __FUNCTION__, RC.nb_L1_inst);
LOG_I(PHY, "%s() RC.nb_macrlc_inst:%d\n", __FUNCTION__, RC.nb_macrlc_inst);
if (RC.nb_L1_inst>0)
AssertFatal(l1_north_init_eNB()==0,"could not initialize L1 north interface\n");
if (RC.nb_macrlc_inst>0)
AssertFatal(RC.nb_macrlc_inst == enb_id_end-enb_id_start,
"Number of MACRLC instances %d != number of RRC instances %d\n",
RC.nb_macrlc_inst, enb_id_end-enb_id_start);
LOG_I(ENB_APP,"Allocating eNB_RRC_INST for %d instances\n",RC.nb_inst);
RC.rrc = (eNB_RRC_INST **)malloc(RC.nb_inst*sizeof(eNB_RRC_INST *));
LOG_I(ENB_APP, "%s() RC.nb_inst:%d RC.rrc:%p\n", __FUNCTION__, RC.nb_inst, RC.rrc);
for (enb_id = enb_id_start; (enb_id < enb_id_end) ; enb_id++) {
configure_rrc(enb_id, &rrc_msg_p[enb_id]);
if (RC.nb_macrlc_inst > 0 && mac_has_f1[enb_id]==1)
RC.rrc[enb_id]->node_type = ngran_eNB_DU;
else
pdcp_layer_init();
}
create_remaining_tasks(0);
for (enb_id = enb_id_start; (enb_id < enb_id_end) ; enb_id++) {
LOG_I(ENB_APP,"Sending configuration message to RRC task\n");
itti_send_msg_to_task (TASK_RRC_ENB, ENB_MODULE_ID_TO_INSTANCE(enb_id), rrc_msg_p[enb_id]);
}
# if defined(ENABLE_USE_MME)
/* Try to register each eNB */
registered_enb = 0;
// This assumes that node_type of all RRC instances is the same
register_enb_pending = eNB_app_register (RC.rrc[0]->node_type,enb_id_start, enb_id_end);//, enb_properties_p);
# else
/* Start L2L1 task */
msg_p = itti_alloc_new_message(TASK_ENB_APP, INITIALIZE_MESSAGE);
itti_send_msg_to_task(TASK_L2L1, INSTANCE_DEFAULT, msg_p);
# endif
do {
// Wait for a message
itti_receive_msg (TASK_ENB_APP, &msg_p);
instance = ITTI_MSG_INSTANCE (msg_p);
switch (ITTI_MSG_ID(msg_p)) {
case TERMINATE_MESSAGE:
LOG_W(ENB_APP, " *** Exiting ENB_APP thread\n");
itti_exit_task ();
break;
case MESSAGE_TEST:
LOG_I(ENB_APP, "Received %s\n", ITTI_MSG_NAME(msg_p));
break;
# if defined(ENABLE_USE_MME)
case S1AP_REGISTER_ENB_CNF:
AssertFatal(RC.rrc[0]->node_type != ngran_eNB_DU, "Should not have received S1AP_REGISTER_ENB_CNF\n");
LOG_I(ENB_APP, "[eNB %d] Received %s: associated MME %d\n", instance, ITTI_MSG_NAME (msg_p),
S1AP_REGISTER_ENB_CNF(msg_p).nb_mme);
DevAssert(register_enb_pending > 0);
register_enb_pending--;
/* Check if at least eNB is registered with one MME */
if (S1AP_REGISTER_ENB_CNF(msg_p).nb_mme > 0) {
registered_enb++;
}
/* Check if all register eNB requests have been processed */
if (register_enb_pending == 0) {
if (registered_enb == enb_nb) {
/* If all eNB are registered, start L2L1 task */
MessageDef *msg_init_p;
msg_init_p = itti_alloc_new_message (TASK_ENB_APP, INITIALIZE_MESSAGE);
itti_send_msg_to_task (TASK_L2L1, INSTANCE_DEFAULT, msg_init_p);
} else {
LOG_W(ENB_APP, " %d eNB not associated with a MME, retrying registration in %d seconds ...\n",
enb_nb - registered_enb, ENB_REGISTER_RETRY_DELAY);
/* Restart the eNB registration process in ENB_REGISTER_RETRY_DELAY seconds */
if (timer_setup (ENB_REGISTER_RETRY_DELAY, 0, TASK_ENB_APP, INSTANCE_DEFAULT, TIMER_ONE_SHOT,
NULL, &enb_register_retry_timer_id) < 0) {
LOG_E(ENB_APP, " Can not start eNB register retry timer, use \"sleep\" instead!\n");
sleep(ENB_REGISTER_RETRY_DELAY);
/* Restart the registration process */
registered_enb = 0;
register_enb_pending = eNB_app_register (RC.rrc[0]->node_type,enb_id_start, enb_id_end);//, enb_properties_p);
}
}
}
break;
case F1AP_SETUP_RESP:
AssertFatal(RC.rrc[0]->node_type == ngran_eNB_DU, "Should not have received F1AP_REGISTER_ENB_CNF\n");
LOG_I(ENB_APP, "[eNB %d] Received %s: associated ngran_eNB_CU %s with %d cells to activate\n", instance, ITTI_MSG_NAME (msg_p),
F1AP_SETUP_RESP(msg_p).gNB_CU_name,F1AP_SETUP_RESP(msg_p).num_cells_to_activate);
handle_f1ap_setup_resp(&F1AP_SETUP_RESP(msg_p));
DevAssert(register_enb_pending > 0);
register_enb_pending--;
/* Check if at least eNB is registered with one MME */
if (F1AP_SETUP_RESP(msg_p).num_cells_to_activate > 0) {
registered_enb++;
}
/* Check if all register eNB requests have been processed */
if (register_enb_pending == 0) {
if (registered_enb == enb_nb) {
/* If all eNB cells are registered, start L2L1 task */
MessageDef *msg_init_p;
msg_init_p = itti_alloc_new_message (TASK_ENB_APP, INITIALIZE_MESSAGE);
itti_send_msg_to_task (TASK_L2L1, INSTANCE_DEFAULT, msg_init_p);
} else {
LOG_W(ENB_APP, " %d eNB not associated with a MME, retrying registration in %d seconds ...\n",
enb_nb - registered_enb, ENB_REGISTER_RETRY_DELAY);
/* Restart the eNB registration process in ENB_REGISTER_RETRY_DELAY seconds */
if (timer_setup (ENB_REGISTER_RETRY_DELAY, 0, TASK_ENB_APP, INSTANCE_DEFAULT, TIMER_ONE_SHOT,
NULL, &enb_register_retry_timer_id) < 0) {
LOG_E(ENB_APP, " Can not start eNB register retry timer, use \"sleep\" instead!\n");
sleep(ENB_REGISTER_RETRY_DELAY);
/* Restart the registration process */
registered_enb = 0;
register_enb_pending = eNB_app_register (RC.rrc[0]->node_type,enb_id_start, enb_id_end);//, enb_properties_p);
}
}
}
break;
case S1AP_DEREGISTERED_ENB_IND:
LOG_W(ENB_APP, "[eNB %d] Received %s: associated MME %d\n", instance, ITTI_MSG_NAME (msg_p),
S1AP_DEREGISTERED_ENB_IND(msg_p).nb_mme);
/* TODO handle recovering of registration */
break;
case TIMER_HAS_EXPIRED:
LOG_I(ENB_APP, " Received %s: timer_id %ld\n", ITTI_MSG_NAME (msg_p), TIMER_HAS_EXPIRED(msg_p).timer_id);
if (TIMER_HAS_EXPIRED (msg_p).timer_id == enb_register_retry_timer_id) {
/* Restart the registration process */
registered_enb = 0;
register_enb_pending = eNB_app_register (RC.rrc[0]->node_type,enb_id_start, enb_id_end);//, enb_properties_p);
}
break;
# endif
default:
LOG_E(ENB_APP, "Received unexpected message %s\n", ITTI_MSG_NAME (msg_p));
break;
}
result = itti_free (ITTI_MSG_ORIGIN_ID(msg_p), msg_p);
AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
} while (1);
#endif
return NULL;
}
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