340 lines
14 KiB
C
340 lines
14 KiB
C
/*******************************************************************************
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OpenAirInterface
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Copyright(c) 1999 - 2014 Eurecom
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OpenAirInterface is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenAirInterface is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OpenAirInterface.The full GNU General Public License is
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included in this distribution in the file called "COPYING". If not,
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see <http://www.gnu.org/licenses/>.
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Contact Information
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OpenAirInterface Admin: openair_admin@eurecom.fr
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OpenAirInterface Tech : openair_tech@eurecom.fr
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OpenAirInterface Dev : openair4g-devel@eurecom.fr
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Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
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*******************************************************************************/
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/*
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enb_app.c
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-------------------
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AUTHOR : Laurent Winckel, Sebastien ROUX, Lionel GAUTHIER, Navid Nikaein
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COMPANY : EURECOM
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EMAIL : Lionel.Gauthier@eurecom.fr and Navid Nikaein
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*/
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#include <string.h>
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#include <stdio.h>
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#include "enb_app.h"
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#include "enb_config.h"
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#include "assertions.h"
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#include "log.h"
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#if defined(OAI_EMU)
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# include "OCG.h"
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# include "OCG_extern.h"
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#endif
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#if defined(ENABLE_ITTI)
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# include "intertask_interface.h"
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# include "timer.h"
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# if defined(ENABLE_USE_MME)
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# include "s1ap_eNB.h"
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# include "sctp_eNB_task.h"
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# include "gtpv1u_eNB_task.h"
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# endif
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extern unsigned char NB_eNB_INST;
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#endif
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#if defined(ENABLE_ITTI)
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/*------------------------------------------------------------------------------*/
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# if defined(ENABLE_USE_MME)
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# define ENB_REGISTER_RETRY_DELAY 10
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# endif
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/*------------------------------------------------------------------------------*/
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static void configure_phy(uint32_t enb_id, const Enb_properties_array_t *enb_properties)
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{
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MessageDef *msg_p;
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int CC_id;
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msg_p = itti_alloc_new_message (TASK_ENB_APP, PHY_CONFIGURATION_REQ);
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for (CC_id=0;CC_id<MAX_NUM_CCs;CC_id++) {
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PHY_CONFIGURATION_REQ (msg_p).frame_type[CC_id] = enb_properties->properties[enb_id]->frame_type[CC_id];
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PHY_CONFIGURATION_REQ (msg_p).prefix_type[CC_id] = enb_properties->properties[enb_id]->prefix_type[CC_id];
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PHY_CONFIGURATION_REQ (msg_p).downlink_frequency[CC_id] = enb_properties->properties[enb_id]->downlink_frequency[CC_id];
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PHY_CONFIGURATION_REQ (msg_p).uplink_frequency_offset[CC_id] = enb_properties->properties[enb_id]->uplink_frequency_offset[CC_id];
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}
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itti_send_msg_to_task (TASK_PHY_ENB, enb_id, msg_p);
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}
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/*------------------------------------------------------------------------------*/
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static void configure_rrc(uint32_t enb_id, const Enb_properties_array_t *enb_properties)
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{
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MessageDef *msg_p = NULL;
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int CC_id;
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msg_p = itti_alloc_new_message (TASK_ENB_APP, RRC_CONFIGURATION_REQ);
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RRC_CONFIGURATION_REQ (msg_p).cell_identity = enb_properties->properties[enb_id]->eNB_id;
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RRC_CONFIGURATION_REQ (msg_p).tac = enb_properties->properties[enb_id]->tac;
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RRC_CONFIGURATION_REQ (msg_p).mcc = enb_properties->properties[enb_id]->mcc;
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RRC_CONFIGURATION_REQ (msg_p).mnc = enb_properties->properties[enb_id]->mnc;
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RRC_CONFIGURATION_REQ (msg_p).mnc_digit_length = enb_properties->properties[enb_id]->mnc_digit_length;
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for (CC_id=0;CC_id<MAX_NUM_CCs;CC_id++) {
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RRC_CONFIGURATION_REQ (msg_p).pcch_defaultPagingCycle[CC_id] = enb_properties->properties[enb_id]->pcch_defaultPagingCycle[CC_id];
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RRC_CONFIGURATION_REQ (msg_p).frame_type[CC_id] = enb_properties->properties[enb_id]->frame_type[CC_id];
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RRC_CONFIGURATION_REQ (msg_p).tdd_config[CC_id] = enb_properties->properties[enb_id]->tdd_config[CC_id];
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RRC_CONFIGURATION_REQ (msg_p).tdd_config_s[CC_id] = enb_properties->properties[enb_id]->tdd_config_s[CC_id];
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RRC_CONFIGURATION_REQ (msg_p).eutra_band[CC_id] = enb_properties->properties[enb_id]->eutra_band[CC_id];
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}
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itti_send_msg_to_task (TASK_RRC_ENB, enb_id, msg_p);
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}
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/*------------------------------------------------------------------------------*/
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# if defined(ENABLE_USE_MME)
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static uint32_t eNB_app_register(uint32_t enb_id_start, uint32_t enb_id_end, const Enb_properties_array_t *enb_properties)
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{
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uint32_t enb_id;
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uint32_t mme_id;
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MessageDef *msg_p;
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uint32_t register_enb_pending = 0;
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char *str = NULL;
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struct in_addr addr;
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# if defined(OAI_EMU)
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# endif
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for (enb_id = enb_id_start; (enb_id < enb_id_end) ; enb_id++)
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{
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# if defined(OAI_EMU)
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if (oai_emulation.info.cli_start_enb[enb_id] == 1)
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# endif
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{
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s1ap_register_enb_req_t *s1ap_register_eNB;
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/* note: there is an implicit relationship between the data structure and the message name */
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msg_p = itti_alloc_new_message (TASK_ENB_APP, S1AP_REGISTER_ENB_REQ);
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s1ap_register_eNB = &S1AP_REGISTER_ENB_REQ(msg_p);
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/* Some default/random parameters */
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s1ap_register_eNB->eNB_id = enb_properties->properties[enb_id]->eNB_id;
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s1ap_register_eNB->cell_type = enb_properties->properties[enb_id]->cell_type;
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s1ap_register_eNB->eNB_name = enb_properties->properties[enb_id]->eNB_name;
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s1ap_register_eNB->tac = enb_properties->properties[enb_id]->tac;
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s1ap_register_eNB->mcc = enb_properties->properties[enb_id]->mcc;
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s1ap_register_eNB->mnc = enb_properties->properties[enb_id]->mnc;
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s1ap_register_eNB->mnc_digit_length = enb_properties->properties[enb_id]->mnc_digit_length;
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s1ap_register_eNB->default_drx = enb_properties->properties[enb_id]->pcch_defaultPagingCycle[0];
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s1ap_register_eNB->nb_mme = enb_properties->properties[enb_id]->nb_mme;
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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);
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for (mme_id = 0; mme_id < s1ap_register_eNB->nb_mme; mme_id++)
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{
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s1ap_register_eNB->mme_ip_address[mme_id].ipv4 = enb_properties->properties[enb_id]->mme_ip_address[mme_id].ipv4;
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s1ap_register_eNB->mme_ip_address[mme_id].ipv6 = enb_properties->properties[enb_id]->mme_ip_address[mme_id].ipv6;
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strncpy (s1ap_register_eNB->mme_ip_address[mme_id].ipv4_address,
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enb_properties->properties[enb_id]->mme_ip_address[mme_id].ipv4_address,
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sizeof(s1ap_register_eNB->mme_ip_address[0].ipv4_address));
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strncpy (s1ap_register_eNB->mme_ip_address[mme_id].ipv6_address,
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enb_properties->properties[enb_id]->mme_ip_address[mme_id].ipv6_address,
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sizeof(s1ap_register_eNB->mme_ip_address[0].ipv6_address));
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}
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s1ap_register_eNB->enb_ip_address.ipv6 = 0;
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s1ap_register_eNB->enb_ip_address.ipv4 = 1;
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addr.s_addr = enb_properties->properties[enb_id]->enb_ipv4_address_for_S1_MME;
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str = inet_ntoa(addr);
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strcpy(s1ap_register_eNB->enb_ip_address.ipv4_address, str);
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itti_send_msg_to_task (TASK_S1AP, enb_id, msg_p);
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register_enb_pending++;
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}
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}
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return register_enb_pending;
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}
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# endif
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#endif
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/*------------------------------------------------------------------------------*/
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void *eNB_app_task(void *args_p)
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{
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const Enb_properties_array_t *enb_properties_p = NULL;
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#if defined(ENABLE_ITTI)
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uint32_t enb_nb = 1; /* Default number of eNB is 1 */
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uint32_t enb_id_start = 0;
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uint32_t enb_id_end = enb_id_start + enb_nb;
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# if defined(ENABLE_USE_MME)
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uint32_t register_enb_pending;
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uint32_t registered_enb;
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long enb_register_retry_timer_id;
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# endif
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uint32_t enb_id;
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MessageDef *msg_p = NULL;
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const char *msg_name = NULL;
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instance_t instance;
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int result;
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itti_mark_task_ready (TASK_ENB_APP);
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# if defined(ENABLE_USE_MME)
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# if defined(OAI_EMU)
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enb_nb = oai_emulation.info.nb_enb_local;
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enb_id_start = oai_emulation.info.first_enb_local;
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enb_id_end = oai_emulation.info.first_enb_local + enb_nb;
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AssertFatal (enb_id_end <= NUMBER_OF_eNB_MAX,
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"Last eNB index is greater or equal to maximum eNB index (%d/%d)!",
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enb_id_end, NUMBER_OF_eNB_MAX);
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# endif
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# endif
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enb_properties_p = enb_config_get();
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AssertFatal (enb_nb <= enb_properties_p->number,
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"Number of eNB is greater than eNB defined in configuration file (%d/%d)!",
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enb_nb, enb_properties_p->number);
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for (enb_id = enb_id_start; (enb_id < enb_id_end) ; enb_id++)
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{
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configure_phy(enb_id, enb_properties_p);
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configure_rrc(enb_id, enb_properties_p);
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}
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# if defined(ENABLE_USE_MME)
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/* Try to register each eNB */
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registered_enb = 0;
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register_enb_pending = eNB_app_register (enb_id_start, enb_id_end, enb_properties_p);
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# else
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/* Start L2L1 task */
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msg_p = itti_alloc_new_message(TASK_ENB_APP, INITIALIZE_MESSAGE);
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itti_send_msg_to_task(TASK_L2L1, INSTANCE_DEFAULT, msg_p);
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# endif
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do
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{
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// Wait for a message
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itti_receive_msg (TASK_ENB_APP, &msg_p);
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msg_name = ITTI_MSG_NAME (msg_p);
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instance = ITTI_MSG_INSTANCE (msg_p);
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switch (ITTI_MSG_ID(msg_p))
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{
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case TERMINATE_MESSAGE:
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itti_exit_task ();
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break;
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case MESSAGE_TEST:
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LOG_I(ENB_APP, "Received %s\n", ITTI_MSG_NAME(msg_p));
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break;
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# if defined(ENABLE_USE_MME)
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case S1AP_REGISTER_ENB_CNF:
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LOG_I(ENB_APP, "[eNB %d] Received %s: associated MME %d\n", instance, msg_name,
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S1AP_REGISTER_ENB_CNF(msg_p).nb_mme);
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DevAssert(register_enb_pending > 0);
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register_enb_pending--;
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/* Check if at least eNB is registered with one MME */
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if (S1AP_REGISTER_ENB_CNF(msg_p).nb_mme > 0)
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{
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registered_enb++;
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}
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/* Check if all register eNB requests have been processed */
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if (register_enb_pending == 0)
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{
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if (registered_enb == enb_nb)
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{
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/* If all eNB are registered, start L2L1 task */
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MessageDef *msg_init_p;
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msg_init_p = itti_alloc_new_message (TASK_ENB_APP, INITIALIZE_MESSAGE);
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itti_send_msg_to_task (TASK_L2L1, INSTANCE_DEFAULT, msg_init_p);
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# if defined(OAI_EMU)
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/* Also inform all NAS UE tasks */
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for (instance = NB_eNB_INST + oai_emulation.info.first_ue_local;
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instance < (NB_eNB_INST + oai_emulation.info.first_ue_local + oai_emulation.info.nb_ue_local); instance ++)
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{
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msg_init_p = itti_alloc_new_message (TASK_ENB_APP, INITIALIZE_MESSAGE);
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itti_send_msg_to_task (TASK_NAS_UE, instance, msg_init_p);
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}
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# endif
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}
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else
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{
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uint32_t not_associated = enb_nb - registered_enb;
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LOG_W(ENB_APP, " %d eNB %s not associated with a MME, retrying registration in %d seconds ...\n",
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not_associated, not_associated > 1 ? "are" : "is", ENB_REGISTER_RETRY_DELAY);
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/* Restart the eNB registration process in ENB_REGISTER_RETRY_DELAY seconds */
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if (timer_setup (ENB_REGISTER_RETRY_DELAY, 0, TASK_ENB_APP, INSTANCE_DEFAULT, TIMER_ONE_SHOT,
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NULL, &enb_register_retry_timer_id) < 0)
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{
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LOG_E(ENB_APP, " Can not start eNB register retry timer, use \"sleep\" instead!\n");
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sleep(ENB_REGISTER_RETRY_DELAY);
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/* Restart the registration process */
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registered_enb = 0;
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register_enb_pending = eNB_app_register (enb_id_start, enb_id_end, enb_properties_p);
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}
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}
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}
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break;
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case S1AP_DEREGISTERED_ENB_IND:
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LOG_W(ENB_APP, "[eNB %d] Received %s: associated MME %d\n", instance, msg_name,
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S1AP_DEREGISTERED_ENB_IND(msg_p).nb_mme);
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/* TODO handle recovering of registration */
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break;
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case TIMER_HAS_EXPIRED:
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LOG_I(ENB_APP, " Received %s: timer_id %d\n", msg_name, TIMER_HAS_EXPIRED(msg_p).timer_id);
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if (TIMER_HAS_EXPIRED (msg_p).timer_id == enb_register_retry_timer_id)
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{
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/* Restart the registration process */
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registered_enb = 0;
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register_enb_pending = eNB_app_register (enb_id_start, enb_id_end, enb_properties_p);
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}
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break;
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# endif
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default:
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LOG_E(ENB_APP, "Received unexpected message %s\n", msg_name);
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break;
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}
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result = itti_free (ITTI_MSG_ORIGIN_ID(msg_p), msg_p);
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AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
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} while (1);
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#endif
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return NULL;
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}
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