/******************************************************************************* Eurecom OpenAirInterface 2 Copyright(c) 1999 - 2014 Eurecom This program is free software; you can redistribute it and/or modify it under the terms and conditions of the GNU General Public License, version 2, as published by the Free Software Foundation. This program is distributed in the hope it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. The full GNU General Public License is included in this distribution in the file called "COPYING". Contact Information Openair Admin: openair_admin@eurecom.fr Openair Tech : openair_tech@eurecom.fr Forums : http://forums.eurecom.fsr/openairinterface Address : EURECOM, Campus SophiaTech, 450 Route des Chappes, CS 50193 06904 Biot Sophia Antipolis cedex, FRANCE *******************************************************************************/ /* enb_app.c ------------------- AUTHOR : Laurent Winckel, Sebastien ROUX, Lionel GAUTHIER COMPANY : EURECOM EMAIL : Lionel.Gauthier@eurecom.fr */ #include #include #include "enb_app.h" #include "enb_config.h" #include "assertions.h" #include "log.h" #if defined(OAI_EMU) # include "OCG.h" # include "OCG_extern.h" #endif #if defined(ENABLE_ITTI) # include "intertask_interface.h" # include "timer.h" # if defined(ENABLE_USE_MME) # include "s1ap_eNB.h" # include "sctp_eNB_task.h" # include "gtpv1u_eNB_task.h" # endif extern unsigned char NB_eNB_INST; #endif #if defined(ENABLE_ITTI) /*------------------------------------------------------------------------------*/ # if defined(ENABLE_USE_MME) # define ENB_REGISTER_RETRY_DELAY 10 # endif /*------------------------------------------------------------------------------*/ static void configure_phy(uint32_t enb_id, const Enb_properties_array_t *enb_properties) { MessageDef *msg_p; msg_p = itti_alloc_new_message (TASK_ENB_APP, PHY_CONFIGURATION_REQ); PHY_CONFIGURATION_REQ (msg_p).frame_type = enb_properties->properties[enb_id]->frame_type; PHY_CONFIGURATION_REQ (msg_p).prefix_type = enb_properties->properties[enb_id]->prefix_type; PHY_CONFIGURATION_REQ (msg_p).downlink_frequency = enb_properties->properties[enb_id]->downlink_frequency; PHY_CONFIGURATION_REQ (msg_p).uplink_frequency_offset = enb_properties->properties[enb_id]->uplink_frequency_offset; itti_send_msg_to_task (TASK_PHY_ENB, enb_id, msg_p); } /*------------------------------------------------------------------------------*/ static void configure_rrc(uint32_t enb_id, const Enb_properties_array_t *enb_properties) { MessageDef *msg_p = NULL; msg_p = itti_alloc_new_message (TASK_ENB_APP, RRC_CONFIGURATION_REQ); RRC_CONFIGURATION_REQ (msg_p).cell_identity = enb_properties->properties[enb_id]->eNB_id; RRC_CONFIGURATION_REQ (msg_p).tac = enb_properties->properties[enb_id]->tac; RRC_CONFIGURATION_REQ (msg_p).mcc = enb_properties->properties[enb_id]->mcc; RRC_CONFIGURATION_REQ (msg_p).mnc = enb_properties->properties[enb_id]->mnc; RRC_CONFIGURATION_REQ (msg_p).mnc_digit_length = enb_properties->properties[enb_id]->mnc_digit_length; RRC_CONFIGURATION_REQ (msg_p).default_drx = enb_properties->properties[enb_id]->default_drx; RRC_CONFIGURATION_REQ (msg_p).frame_type = enb_properties->properties[enb_id]->frame_type; RRC_CONFIGURATION_REQ (msg_p).tdd_config = enb_properties->properties[enb_id]->tdd_config; RRC_CONFIGURATION_REQ (msg_p).tdd_config_s = enb_properties->properties[enb_id]->tdd_config_s; RRC_CONFIGURATION_REQ (msg_p).eutra_band = enb_properties->properties[enb_id]->eutra_band; itti_send_msg_to_task (TASK_RRC_ENB, enb_id, msg_p); } /*------------------------------------------------------------------------------*/ # if defined(ENABLE_USE_MME) static uint32_t eNB_app_register(uint32_t enb_id_start, uint32_t enb_id_end, const Enb_properties_array_t *enb_properties) { uint32_t enb_id; uint32_t mme_id; MessageDef *msg_p; uint32_t register_enb_pending = 0; char *str = NULL; struct in_addr addr; # if defined(OAI_EMU) # endif for (enb_id = enb_id_start; (enb_id < enb_id_end) ; enb_id++) { # if defined(OAI_EMU) if (oai_emulation.info.cli_start_enb[enb_id] == 1) # endif { s1ap_register_enb_req_t *s1ap_register_eNB; /* 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); s1ap_register_eNB = &S1AP_REGISTER_ENB_REQ(msg_p); /* Some default/random parameters */ s1ap_register_eNB->eNB_id = enb_properties->properties[enb_id]->eNB_id; s1ap_register_eNB->cell_type = enb_properties->properties[enb_id]->cell_type; s1ap_register_eNB->eNB_name = enb_properties->properties[enb_id]->eNB_name; s1ap_register_eNB->tac = enb_properties->properties[enb_id]->tac; s1ap_register_eNB->mcc = enb_properties->properties[enb_id]->mcc; s1ap_register_eNB->mnc = enb_properties->properties[enb_id]->mnc; s1ap_register_eNB->mnc_digit_length = enb_properties->properties[enb_id]->mnc_digit_length; s1ap_register_eNB->default_drx = enb_properties->properties[enb_id]->default_drx; s1ap_register_eNB->nb_mme = enb_properties->properties[enb_id]->nb_mme; AssertFatal (s1ap_register_eNB->nb_mme <= S1AP_MAX_NB_MME_IP_ADDRESS, "Too many MME for eNB %d (%d/%d)!", enb_id, s1ap_register_eNB->nb_mme, S1AP_MAX_NB_MME_IP_ADDRESS); for (mme_id = 0; mme_id < s1ap_register_eNB->nb_mme; mme_id++) { s1ap_register_eNB->mme_ip_address[mme_id].ipv4 = enb_properties->properties[enb_id]->mme_ip_address[mme_id].ipv4; s1ap_register_eNB->mme_ip_address[mme_id].ipv6 = enb_properties->properties[enb_id]->mme_ip_address[mme_id].ipv6; strncpy (s1ap_register_eNB->mme_ip_address[mme_id].ipv4_address, enb_properties->properties[enb_id]->mme_ip_address[mme_id].ipv4_address, sizeof(s1ap_register_eNB->mme_ip_address[0].ipv4_address)); strncpy (s1ap_register_eNB->mme_ip_address[mme_id].ipv6_address, enb_properties->properties[enb_id]->mme_ip_address[mme_id].ipv6_address, sizeof(s1ap_register_eNB->mme_ip_address[0].ipv6_address)); } s1ap_register_eNB->enb_ip_address.ipv6 = 0; s1ap_register_eNB->enb_ip_address.ipv4 = 1; addr.s_addr = enb_properties->properties[enb_id]->enb_ipv4_address_for_S1_MME; str = inet_ntoa(addr); strcpy(s1ap_register_eNB->enb_ip_address.ipv4_address, str); itti_send_msg_to_task (TASK_S1AP, enb_id, msg_p); register_enb_pending++; } } return register_enb_pending; } # endif #endif /*------------------------------------------------------------------------------*/ void *eNB_app_task(void *args_p) { const Enb_properties_array_t *enb_properties_p = NULL; #if defined(ENABLE_ITTI) 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; # 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; const char *msg_name = NULL; instance_t instance; int result; itti_mark_task_ready (TASK_ENB_APP); # if defined(ENABLE_USE_MME) # if defined(OAI_EMU) enb_nb = oai_emulation.info.nb_enb_local; enb_id_start = oai_emulation.info.first_enb_local; enb_id_end = oai_emulation.info.first_enb_local + enb_nb; AssertFatal (enb_id_end <= NUMBER_OF_eNB_MAX, "Last eNB index is greater or equal to maximum eNB index (%d/%d)!", enb_id_end, NUMBER_OF_eNB_MAX); # endif # endif 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); for (enb_id = enb_id_start; (enb_id < enb_id_end) ; enb_id++) { configure_phy(enb_id, enb_properties_p); configure_rrc(enb_id, enb_properties_p); } # if defined(ENABLE_USE_MME) /* Try to register each eNB */ registered_enb = 0; register_enb_pending = eNB_app_register (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); 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; # if defined(ENABLE_USE_MME) 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) { /* 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); # if defined(OAI_EMU) /* Also inform all NAS UE tasks */ for (instance = NB_eNB_INST + oai_emulation.info.first_ue_local; instance < (NB_eNB_INST + oai_emulation.info.first_ue_local + oai_emulation.info.nb_ue_local); instance ++) { msg_init_p = itti_alloc_new_message (TASK_ENB_APP, INITIALIZE_MESSAGE); itti_send_msg_to_task (TASK_NAS_UE, instance, msg_init_p); } # endif } 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; # endif 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); #endif return NULL; }