110 lines
3.6 KiB
C
110 lines
3.6 KiB
C
/*******************************************************************************
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Eurecom OpenAirInterface
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Copyright(c) 1999 - 2012 Eurecom
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This program is free software; you can redistribute it and/or modify it
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under the terms and conditions of the GNU General Public License,
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version 2, as published by the Free Software Foundation.
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This program is distributed in the hope it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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The full GNU General Public License is included in this distribution in
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the file called "COPYING".
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Contact Information
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Openair Admin: openair_admin@eurecom.fr
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Openair Tech : openair_tech@eurecom.fr
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Forums : http://forums.eurecom.fr/openairinterface
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Address : EURECOM, Campus SophiaTech, 450 Route des Chappes
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06410 Biot FRANCE
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*******************************************************************************/
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/*! \file s1ap_eNB_overload.c
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* \brief s1ap procedures for overload messages within eNB
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* \author Sebastien ROUX <sebastien.roux@eurecom.fr>
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* \date 2012
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* \version 0.1
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include "s1ap_common.h"
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#include "s1ap_ies_defs.h"
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#include "s1ap_eNB_defs.h"
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#include "s1ap_eNB.h"
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#include "s1ap_eNB_ue_context.h"
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#include "s1ap_eNB_encoder.h"
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#include "s1ap_eNB_overload.h"
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#include "sctp_primitives_client.h"
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#include "assertions.h"
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int s1ap_eNB_handle_overload_start(eNB_mme_desc_t *eNB_desc_p,
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sctp_queue_item_t *packet_p,
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struct s1ap_message_s *message_p)
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{
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OverloadStartIEs_t *overload_start_p;
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s1ap_eNB_mme_data_t *mme_desc_p;
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overload_start_p = &message_p->msg.overloadStartIEs;
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DevCheck(overload_start_p->overloadResponse.present ==
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OverloadResponse_PR_overloadAction,
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OverloadResponse_PR_overloadAction, 0, 0);
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/* Non UE-associated signalling -> stream 0 */
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DevCheck(packet_p->local_stream == 0, packet_p->local_stream,
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packet_p->remote_port, packet_p->assoc_id);
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if ((mme_desc_p = s1ap_eNB_get_MME(eNB_desc_p, packet_p->assoc_id)) == NULL) {
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/* No MME context associated */
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return -1;
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}
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/* Mark the MME as overloaded and set the overload state according to
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* the value received.
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*/
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mme_desc_p->state = S1AP_ENB_OVERLOAD;
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mme_desc_p->overload_state =
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overload_start_p->overloadResponse.choice.overloadAction;
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return 0;
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}
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int s1ap_eNB_handle_overload_stop(eNB_mme_desc_t *eNB_desc_p,
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sctp_queue_item_t *packet_p,
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struct s1ap_message_s *message_p)
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{
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/* We received Overload stop message, meaning that the MME is no more
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* overloaded. This is an empty message, with only message header and no
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* Information Element.
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*/
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s1ap_eNB_mme_data_t *mme_desc_p;
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/* Non UE-associated signalling -> stream 0 */
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DevCheck(packet_p->local_stream == 0, packet_p->local_stream,
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packet_p->remote_port, packet_p->assoc_id);
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if ((mme_desc_p = s1ap_eNB_get_MME(eNB_desc_p, packet_p->assoc_id)) == NULL) {
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/* No MME context associated */
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return -1;
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}
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mme_desc_p->state = S1AP_ENB_STATE_CONNECTED;
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mme_desc_p->overload_state = S1AP_NO_OVERLOAD;
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return 0;
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}
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