/* * 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 */ #define _GNU_SOURCE #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <stdint.h> #include <string.h> #include <sys/ioctl.h> #include <sys/types.h> #include <sys/mman.h> #include <sys/stat.h> #include <fcntl.h> #include <sched.h> #include <linux/sched.h> #include <signal.h> #include <execinfo.h> #include <getopt.h> #include <syscall.h> #include "tree.h" #include "queue.h" #include "intertask_interface.h" #include "s1ap_eNB_default_values.h" #include "s1ap_common.h" #include "s1ap_eNB_defs.h" #include "s1ap_eNB_management_procedures.h" #include "assertions.h" #include "platform_types.h" #include "oaisim_mme_test_s1c.h" void s1ap_eNB_handle_sctp_data_ind(sctp_data_ind_t *sctp_data_ind) { int result; DevAssert(sctp_data_ind != NULL); mme_test_s1_notify_sctp_data_ind(sctp_data_ind->assoc_id, sctp_data_ind->stream, sctp_data_ind->buffer, sctp_data_ind->buffer_length); result = itti_free(TASK_UNKNOWN, sctp_data_ind->buffer); AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result); } void s1ap_eNB_itti_send_sctp_data_req(instance_t instance, int32_t assoc_id, uint8_t *buffer, uint32_t buffer_length, uint16_t stream) { MessageDef *message_p; sctp_data_req_t *sctp_data_req; message_p = itti_alloc_new_message(TASK_S1AP, SCTP_DATA_REQ); sctp_data_req = &message_p->ittiMsg.sctp_data_req; sctp_data_req->assoc_id = assoc_id; sctp_data_req->buffer = buffer; sctp_data_req->buffer_length = buffer_length; sctp_data_req->stream = stream; itti_send_msg_to_task(TASK_SCTP, instance, message_p); } 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); } } } void s1ap_eNB_handle_sctp_association_resp(instance_t instance, sctp_new_association_resp_t *sctp_new_association_resp) { s1ap_eNB_instance_t *instance_p; s1ap_eNB_mme_data_t *s1ap_mme_data_p; DevAssert(sctp_new_association_resp != NULL); instance_p = s1ap_eNB_get_instance(instance); DevAssert(instance_p != NULL); s1ap_mme_data_p = s1ap_eNB_get_MME(instance_p, -1, sctp_new_association_resp->ulp_cnx_id); DevAssert(s1ap_mme_data_p != NULL); if (sctp_new_association_resp->sctp_state != SCTP_STATE_ESTABLISHED) { S1AP_WARN("Received unsuccessful result for SCTP association (%u), instance %d, cnx_id %u\n", sctp_new_association_resp->sctp_state, instance, sctp_new_association_resp->ulp_cnx_id); s1ap_handle_s1_setup_message(s1ap_mme_data_p, sctp_new_association_resp->sctp_state == SCTP_STATE_SHUTDOWN); return; } /* Update parameters */ s1ap_mme_data_p->assoc_id = sctp_new_association_resp->assoc_id; s1ap_mme_data_p->in_streams = sctp_new_association_resp->in_streams; s1ap_mme_data_p->out_streams = sctp_new_association_resp->out_streams; /* Prepare new S1 Setup Request */ mme_test_s1_start_test(instance_p, s1ap_mme_data_p); } void s1ap_eNB_register_mme(s1ap_eNB_instance_t *instance_p, net_ip_address_t *mme_ip_address, net_ip_address_t *local_ip_addr) { MessageDef *message_p = NULL; sctp_new_association_req_t *sctp_new_association_req_p = NULL; s1ap_eNB_mme_data_t *s1ap_mme_data_p = NULL; DevAssert(instance_p != NULL); DevAssert(mme_ip_address != NULL); message_p = itti_alloc_new_message(TASK_S1AP, SCTP_NEW_ASSOCIATION_REQ); sctp_new_association_req_p = &message_p->ittiMsg.sctp_new_association_req; sctp_new_association_req_p->port = S1AP_PORT_NUMBER; sctp_new_association_req_p->ppid = S1AP_SCTP_PPID; memcpy(&sctp_new_association_req_p->remote_address, mme_ip_address, sizeof(*mme_ip_address)); memcpy(&sctp_new_association_req_p->local_address, local_ip_addr, sizeof(*local_ip_addr)); /* Create new MME descriptor */ s1ap_mme_data_p = calloc(1, sizeof(*s1ap_mme_data_p)); DevAssert(s1ap_mme_data_p != NULL); s1ap_mme_data_p->cnx_id = s1ap_eNB_fetch_add_global_cnx_id(); sctp_new_association_req_p->ulp_cnx_id = s1ap_mme_data_p->cnx_id; s1ap_mme_data_p->assoc_id = -1; s1ap_mme_data_p->s1ap_eNB_instance = instance_p; STAILQ_INIT(&s1ap_mme_data_p->served_gummei); /* Insert the new descriptor in list of known MME * but not yet associated. */ RB_INSERT(s1ap_mme_map, &instance_p->s1ap_mme_head, s1ap_mme_data_p); s1ap_mme_data_p->state = S1AP_ENB_STATE_WAITING; instance_p->s1ap_mme_nb ++; instance_p->s1ap_mme_pending_nb ++; itti_send_msg_to_task(TASK_SCTP, instance_p->instance, message_p); } void s1ap_eNB_handle_register_eNB(instance_t instance, s1ap_register_enb_req_t *s1ap_register_eNB) { s1ap_eNB_instance_t *new_instance; uint8_t index; DevAssert(s1ap_register_eNB != NULL); /* Look if the provided instance already exists */ new_instance = s1ap_eNB_get_instance(instance); if (new_instance != NULL) { /* Checks if it is a retry on the same eNB */ DevCheck(new_instance->eNB_id == s1ap_register_eNB->eNB_id, new_instance->eNB_id, s1ap_register_eNB->eNB_id, 0); DevCheck(new_instance->cell_type == s1ap_register_eNB->cell_type, new_instance->cell_type, s1ap_register_eNB->cell_type, 0); DevCheck(new_instance->tac == s1ap_register_eNB->tac, new_instance->tac, s1ap_register_eNB->tac, 0); DevCheck(new_instance->mcc == s1ap_register_eNB->mcc, new_instance->mcc, s1ap_register_eNB->mcc, 0); DevCheck(new_instance->mnc == s1ap_register_eNB->mnc, new_instance->mnc, s1ap_register_eNB->mnc, 0); DevCheck(new_instance->mnc_digit_length == s1ap_register_eNB->mnc_digit_length, new_instance->mnc_digit_length, s1ap_register_eNB->mnc_digit_length, 0); DevCheck(new_instance->default_drx == s1ap_register_eNB->default_drx, new_instance->default_drx, s1ap_register_eNB->default_drx, 0); } else { new_instance = calloc(1, sizeof(s1ap_eNB_instance_t)); DevAssert(new_instance != NULL); RB_INIT(&new_instance->s1ap_ue_head); RB_INIT(&new_instance->s1ap_mme_head); /* Copy usefull parameters */ new_instance->instance = instance; new_instance->eNB_name = s1ap_register_eNB->eNB_name; new_instance->eNB_id = s1ap_register_eNB->eNB_id; new_instance->cell_type = s1ap_register_eNB->cell_type; new_instance->tac = s1ap_register_eNB->tac; new_instance->mcc = s1ap_register_eNB->mcc; new_instance->mnc = s1ap_register_eNB->mnc; new_instance->mnc_digit_length = s1ap_register_eNB->mnc_digit_length; new_instance->default_drx = s1ap_register_eNB->default_drx; /* Add the new instance to the list of eNB (meaningfull in virtual mode) */ s1ap_eNB_insert_new_instance(new_instance); S1AP_DEBUG("Registered new eNB[%d] and %s eNB id %u\n", instance, s1ap_register_eNB->cell_type == CELL_MACRO_ENB ? "macro" : "home", s1ap_register_eNB->eNB_id); } DevCheck(s1ap_register_eNB->nb_mme <= S1AP_MAX_NB_MME_IP_ADDRESS, S1AP_MAX_NB_MME_IP_ADDRESS, s1ap_register_eNB->nb_mme, 0); /* Trying to connect to provided list of MME ip address */ for (index = 0; index < s1ap_register_eNB->nb_mme; index++) { s1ap_eNB_register_mme(new_instance, &s1ap_register_eNB->mme_ip_address[index], &s1ap_register_eNB->enb_ip_address); } } void *s1ap_eNB_task(void *arg) { MessageDef *received_msg = NULL; int result; S1AP_DEBUG("Starting S1AP layer\n"); s1ap_eNB_prepare_internal_data(); itti_mark_task_ready(TASK_S1AP); while (1) { itti_receive_msg(TASK_S1AP, &received_msg); switch (ITTI_MSG_ID(received_msg)) { case TERMINATE_MESSAGE: itti_exit_task(); break; case S1AP_REGISTER_ENB_REQ: { /* Register a new eNB. * in Virtual mode eNBs will be distinguished using the mod_id/ * Each eNB has to send an S1AP_REGISTER_ENB message with its * own parameters. */ s1ap_eNB_handle_register_eNB(ITTI_MESSAGE_GET_INSTANCE(received_msg), &S1AP_REGISTER_ENB_REQ(received_msg)); } break; case SCTP_NEW_ASSOCIATION_RESP: { s1ap_eNB_handle_sctp_association_resp(ITTI_MESSAGE_GET_INSTANCE(received_msg), &received_msg->ittiMsg.sctp_new_association_resp); } break; case SCTP_DATA_IND: { s1ap_eNB_handle_sctp_data_ind(&received_msg->ittiMsg.sctp_data_ind); } break; default: S1AP_ERROR("Received unhandled message: %d:%s\n", ITTI_MSG_ID(received_msg), ITTI_MSG_NAME(received_msg)); break; } result = itti_free (ITTI_MSG_ORIGIN_ID(received_msg), received_msg); AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result); received_msg = NULL; } return NULL; }