Osmocom's Base Station Controller for 2G mobile networks https://osmocom.org/projects/osmobsc
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osmo-bsc/include/openbsc/bsc_msc.h

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/* Routines to talk to the MSC using the IPA Protocol */
/*
* (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2010 by On-Waves
* All Rights Reserved
*
* 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/>.
*
*/
#ifndef BSC_MSC_H
#define BSC_MSC_H
#include <osmocom/core/write_queue.h>
#include <osmocom/core/timer.h>
#include <netinet/in.h>
struct bsc_msc_dest {
struct llist_head list;
char *ip;
int port;
int dscp;
};
struct bsc_msc_connection {
struct osmo_wqueue write_queue;
int is_connected;
int is_authenticated;
int first_contact;
struct llist_head *dests;
const char *name;
void (*connection_loss) (struct bsc_msc_connection *);
void (*connected) (struct bsc_msc_connection *);
struct osmo_timer_list reconnect_timer;
struct osmo_timer_list timeout_timer;
struct msgb *pending_msg;
};
struct bsc_msc_connection *bsc_msc_create(void *ctx, struct llist_head *dest);
int bsc_msc_connect(struct bsc_msc_connection *);
void bsc_msc_schedule_connect(struct bsc_msc_connection *);
void bsc_msc_lost(struct bsc_msc_connection *);
struct msgb *bsc_msc_id_get_resp(int fixed, const char *token, const uint8_t *res, int len);
#endif