/* * 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 "targets/RT/USER/lte-softmodem.h" #include "common/utils/LOG/log.h" #if defined(ENABLE_ITTI) # include "intertask_interface.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 "flexran_agent.h" /* temporary warning removale while implementing noS1 */ /* as config option */ # else # ifdef EPC_MODE_ENABLED # undef EPC_MODE_ENABLED # endif # define EPC_MODE_ENABLED 0 # endif # include "x2ap_eNB.h" # include "x2ap_messages_types.h" # define X2AP_ENB_REGISTER_RETRY_DELAY 10 #include "openair1/PHY/INIT/phy_init.h" extern unsigned char NB_eNB_INST; #endif extern RAN_CONTEXT_t RC; extern int emulate_rf; #if defined(ENABLE_ITTI) /*------------------------------------------------------------------------------*/ # 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) { 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 /*------------------------------------------------------------------------------*/ static uint32_t eNB_app_register_x2(uint32_t enb_id_start, uint32_t enb_id_end) { uint32_t enb_id; MessageDef *msg_p; uint32_t register_enb_x2_pending = 0; for (enb_id = enb_id_start; (enb_id < enb_id_end) ; enb_id++) { { msg_p = itti_alloc_new_message (TASK_ENB_APP, X2AP_REGISTER_ENB_REQ); RCconfig_X2(msg_p, enb_id); itti_send_msg_to_task (TASK_X2AP, ENB_MODULE_ID_TO_INSTANCE(enb_id), msg_p); register_enb_x2_pending++; } } return register_enb_x2_pending; } /*------------------------------------------------------------------------------*/ 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=0; uint32_t registered_enb; long enb_register_retry_timer_id; # endif uint32_t x2_register_enb_pending = 0; uint32_t x2_registered_enb = 0; long x2_enb_register_retry_timer_id; MessageDef *msg_p = NULL; instance_t instance; int result; /* for no gcc warnings */ (void)instance; itti_mark_task_ready (TASK_ENB_APP); # 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 /* Try to register each eNB with each other */ if (RC.rrc[0]->node_type == ngran_eNB) { // CU or DU do not need x2_register_enb_pending = eNB_app_register_x2 (enb_id_start, enb_id_end); } 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; case SOFT_RESTART_MESSAGE: handle_reconfiguration(instance); break; 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 in CU/eNB\n"); LOG_I(ENB_APP, "Received %s: associated ngran_eNB_CU %s with %d cells to activate\n", 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: if (EPC_MODE_ENABLED) { 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: # if defined(ENABLE_USE_MME) 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); } if (TIMER_HAS_EXPIRED (msg_p).timer_id == x2_enb_register_retry_timer_id) { /* Restart the registration process */ x2_registered_enb = 0; x2_register_enb_pending = eNB_app_register_x2 (enb_id_start, enb_id_end); } # endif break; case X2AP_DEREGISTERED_ENB_IND: LOG_W(ENB_APP, "[eNB %d] Received %s: associated eNB %d\n", instance, ITTI_MSG_NAME (msg_p), X2AP_DEREGISTERED_ENB_IND(msg_p).nb_x2); /* TODO handle recovering of registration */ break; case X2AP_REGISTER_ENB_CNF: LOG_I(ENB_APP, "[eNB %d] Received %s: associated eNB %d\n", instance, ITTI_MSG_NAME (msg_p), X2AP_REGISTER_ENB_CNF(msg_p).nb_x2); DevAssert(x2_register_enb_pending > 0); x2_register_enb_pending--; /* Check if at least eNB is registered with one target eNB */ if (X2AP_REGISTER_ENB_CNF(msg_p).nb_x2 > 0) { x2_registered_enb++; } /* Check if all register eNB requests have been processed */ if (x2_register_enb_pending == 0) { if (x2_registered_enb == enb_nb) { /* If all eNB are registered, start RRC HO task */ }else { uint32_t x2_not_associated = enb_nb - x2_registered_enb; LOG_W(ENB_APP, " %d eNB %s not associated with the target\n", x2_not_associated, x2_not_associated > 1 ? "are" : "is"); // timer to retry /* Restart the eNB registration process in ENB_REGISTER_RETRY_DELAY seconds */ if (timer_setup (X2AP_ENB_REGISTER_RETRY_DELAY, 0, TASK_ENB_APP, INSTANCE_DEFAULT, TIMER_ONE_SHOT, NULL, &x2_enb_register_retry_timer_id) < 0) { LOG_E(ENB_APP, " Can not start eNB X2AP register: retry timer, use \"sleep\" instead!\n"); sleep(X2AP_ENB_REGISTER_RETRY_DELAY); /* Restart the registration process */ x2_registered_enb = 0; x2_register_enb_pending = eNB_app_register_x2 (enb_id_start, enb_id_end); } } } break; 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; } void handle_reconfiguration(module_id_t mod_id) { struct timespec start, end; clock_gettime(CLOCK_MONOTONIC, &start); flexran_agent_info_t *flexran = RC.flexran[mod_id]; LOG_I(ENB_APP, "lte-softmodem soft-restart requested\n"); if (ENB_WAIT == flexran->node_ctrl_state) { /* this is already waiting, just release */ pthread_mutex_lock(&flexran->mutex_node_ctrl); flexran->node_ctrl_state = ENB_NORMAL_OPERATION; pthread_mutex_unlock(&flexran->mutex_node_ctrl); pthread_cond_signal(&flexran->cond_node_ctrl); return; } if (stop_L1L2(mod_id) < 0) { LOG_E(ENB_APP, "can not stop lte-softmodem, aborting restart\n"); return; } /* node_ctrl_state should have value ENB_MAKE_WAIT only if this method is not * executed by the FlexRAN thread */ if (ENB_MAKE_WAIT == flexran->node_ctrl_state) { LOG_I(ENB_APP, " * eNB %d: Waiting for FlexRAN RTController command *\n", mod_id); pthread_mutex_lock(&flexran->mutex_node_ctrl); flexran->node_ctrl_state = ENB_WAIT; while (ENB_NORMAL_OPERATION != flexran->node_ctrl_state) pthread_cond_wait(&flexran->cond_node_ctrl, &flexran->mutex_node_ctrl); pthread_mutex_unlock(&flexran->mutex_node_ctrl); } if (restart_L1L2(mod_id) < 0) { LOG_E(ENB_APP, "can not restart, killing lte-softmodem\n"); exit_fun("can not restart L1L2, killing lte-softmodem"); return; } clock_gettime(CLOCK_MONOTONIC, &end); end.tv_sec -= start.tv_sec; if (end.tv_nsec >= start.tv_nsec) { end.tv_nsec -= start.tv_nsec; } else { end.tv_sec -= 1; end.tv_nsec = end.tv_nsec - start.tv_nsec + 1000000000; } LOG_I(ENB_APP, "lte-softmodem restart succeeded in %ld.%ld s\n", end.tv_sec, end.tv_nsec / 1000000); }