void s1ap_handle_s1_setup_message(s1ap_eNB_mme_data_t *mme_desc_p, int sctp_shutdown) { if (sctp_shutdown) { /* A previously connected MME has been shutdown */ /* TODO check if it was used by some eNB and send a message to inform these eNB if there is no more associated MME */ if (mme_desc_p->state == S1AP_ENB_STATE_CONNECTED) { mme_desc_p->state = S1AP_ENB_STATE_DISCONNECTED; if (mme_desc_p->s1ap_eNB_instance->s1ap_mme_associated_nb > 0) { /* Decrease associated MME number */ mme_desc_p->s1ap_eNB_instance->s1ap_mme_associated_nb --; } /* If there are no more associated MME, inform eNB app */ if (mme_desc_p->s1ap_eNB_instance->s1ap_mme_associated_nb == 0) { MessageDef *message_p; message_p = itti_alloc_new_message(TASK_S1AP, S1AP_DEREGISTERED_ENB_IND); S1AP_DEREGISTERED_ENB_IND(message_p).nb_mme = 0; itti_send_msg_to_task(TASK_ENB_APP, mme_desc_p->s1ap_eNB_instance->instance, message_p); } } } else { /* Check that at least one setup message is pending */ DevCheck(mme_desc_p->s1ap_eNB_instance->s1ap_mme_pending_nb > 0, mme_desc_p->s1ap_eNB_instance->instance, mme_desc_p->s1ap_eNB_instance->s1ap_mme_pending_nb, 0); if (mme_desc_p->s1ap_eNB_instance->s1ap_mme_pending_nb > 0) { /* Decrease pending messages number */ mme_desc_p->s1ap_eNB_instance->s1ap_mme_pending_nb --; } /* If there are no more pending messages, inform eNB app */ if (mme_desc_p->s1ap_eNB_instance->s1ap_mme_pending_nb == 0) { MessageDef *message_p; message_p = itti_alloc_new_message(TASK_S1AP, S1AP_REGISTER_ENB_CNF); S1AP_REGISTER_ENB_CNF(message_p).nb_mme = mme_desc_p->s1ap_eNB_instance->s1ap_mme_associated_nb; itti_send_msg_to_task(TASK_ENB_APP, mme_desc_p->s1ap_eNB_instance->instance, message_p); } } }
//------------------------------------------------------------------------------ static void *eNB_app_task(void *args_p) //------------------------------------------------------------------------------ { const Enb_properties_array_t *enb_properties_p = NULL; uint32_t enb_nb = 1; /* Default number of eNB is 1 */ uint32_t enb_id_start = 0; uint32_t enb_id_end = enb_id_start + enb_nb; uint32_t register_enb_pending; uint32_t registered_enb; long enb_register_retry_timer_id; MessageDef *msg_p = NULL; const char *msg_name = NULL; instance_t instance; int result; itti_mark_task_ready (TASK_ENB_APP); enb_properties_p = enb_config_get(); AssertFatal (enb_nb <= enb_properties_p->number, "Number of eNB is greater than eNB defined in configuration file (%d/%d)!", enb_nb, enb_properties_p->number); /* Try to register each eNB */ registered_enb = 0; register_enb_pending = eNB_app_register (enb_id_start, enb_id_end, enb_properties_p); do { // Wait for a message itti_receive_msg (TASK_ENB_APP, &msg_p); msg_name = ITTI_MSG_NAME (msg_p); instance = ITTI_MSG_INSTANCE (msg_p); switch (ITTI_MSG_ID(msg_p)) { case TERMINATE_MESSAGE: itti_exit_task (); break; case MESSAGE_TEST: LOG_I(ENB_APP, "Received %s\n", ITTI_MSG_NAME(msg_p)); break; case S1AP_REGISTER_ENB_CNF: LOG_I(ENB_APP, "[eNB %d] Received %s: associated MME %d\n", instance, msg_name, 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) { mme_test_s1_start_test(instance); } else { uint32_t not_associated = enb_nb - registered_enb; LOG_W(ENB_APP, " %d eNB %s not associated with a MME, retrying registration in %d seconds ...\n", not_associated, not_associated > 1 ? "are" : "is", 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 (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, msg_name, 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 %d\n", msg_name, 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 (enb_id_start, enb_id_end, enb_properties_p); } break; default: LOG_E(ENB_APP, "Received unexpected message %s\n", msg_name); 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); return NULL; }