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/* (C) 2018-2019 by sysmocom s.f.m.c. GmbH
* All Rights Reserved
*
* Author: Harald Welte, Philipp Maier
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#pragma once
#include <osmocom/gsm/protocol/gsm_23_003.h>
#include <osmocom/gsm/protocol/gsm_29_118.h>
#include <osmocom/msc/vlr.h>
#include <osmocom/msc/vlr_sgs.h>
#include <osmocom/core/socket.h>
static const unsigned int sgs_state_timer_defaults[_NUM_SGS_STATE_TIMERS] = {
[SGS_STATE_TS5] = SGS_TS5_DEFAULT,
[SGS_STATE_TS6_2] = SGS_TS6_2_DEFAULT,
[SGS_STATE_TS7] = SGS_TS7_DEFAULT,
[SGS_STATE_TS11] = SGS_TS11_DEFAULT,
[SGS_STATE_TS14] = SGS_TS14_DEFAULT,
[SGS_STATE_TS15] = SGS_TS15_DEFAULT,
};
static const unsigned int sgs_state_counter_defaults[_NUM_SGS_STATE_COUNTERS] = {
[SGS_STATE_NS7] = SGS_NS7_DEFAULT,
[SGS_STATE_NS11] = SGS_NS11_DEFAULT,
};
struct sgs_connection {
/* global list of SGs connections */
struct llist_head entry;
/* back-pointer */
struct sgs_state *sgs;
/* Socket name from osmo_sock_get_name() */
char sockname[OSMO_SOCK_NAME_MAXLEN];
/* MME for this connection, if any. This field is NULL until we
* receive the first "MME name" IE from the MME, which could be part
* of the RESET procedure, but also just a normal LU request. */
struct sgs_mme_ctx *mme;
/* represents the SCTP connection we accept()ed from this MME */
struct osmo_stream_srv *srv;
};
struct sgs_mme_ctx {
/* global list of MME contexts */
struct llist_head entry;
/* back-pointer */
struct sgs_state *sgs;
/* MME name as string representation */
char fqdn[GSM23003_MME_DOMAIN_LEN + 1];
/* current connection for this MME, if any. Can be NULL if the SCTP
* connection to the MME was lost and hasn't been re-established yet */
struct sgs_connection *conn;
/* FSM for the "VLR reset" procedure" */
struct osmo_fsm_inst *fi;
unsigned int ns11_remaining;
};
extern struct sgs_state *g_sgs;
struct sgs_state *sgs_iface_init(void *ctx, struct gsm_network *network);
int sgs_iface_rx(struct sgs_connection *sgc, struct msgb *msg);
int sgs_iface_tx_paging(struct vlr_subscr *vsub, enum sgsap_service_ind serv_ind);
int sgs_iface_tx_dtap_ud(struct msgb *msg);
void sgs_iface_tx_release(struct ran_conn *conn);
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