openbsc/include/openbsc/signal.h

/* Generic signalling/notification infrastructure */
/* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
 * (C) 2009 by Harald Welte <laforge@gnumonks.org>
 * All Rights Reserved
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 */

#ifndef OPENBSC_SIGNAL_H
#define OPENBSC_SIGNAL_H

#include <stdlib.h>
#include <errno.h>

#include <openbsc/gsm_data.h>
#include <openbsc/gsm_subscriber.h>


/*
 * Signalling subsystems
 */
enum signal_subsystems {
	SS_PAGING,
	SS_SMS,
	SS_ABISIP,
	SS_NM,
	SS_LCHAN,
	SS_SUBSCR,
	SS_SCALL,
	SS_GLOBAL,
};

/* SS_PAGING signals */
enum signal_paging {
	S_PAGING_COMPLETED,
};

/* SS_SMS signals */
enum signal_sms {
	S_SMS_SUBMITTED,	/* A SMS has been successfully submitted to us */
	S_SMS_DELIVERED,	/* A SMS has been successfully delivered to a MS */
	S_SMS_SMMA,		/* A MS tells us it has more space available */
	S_SMS_MEM_EXCEEDED,	/* A MS tells us it has no more space available */
};

/* SS_ABISIP signals */
enum signal_abisip {
	S_ABISIP_CRCX_ACK,
	S_ABISIP_MDCX_ACK,
	S_ABISIP_DLCX_IND,
};

/* SS_NM signals */
enum signal_nm {
	S_NM_SW_ACTIV_REP,	/* GSM 12.21 software activated report */
	S_NM_FAIL_REP,		/* GSM 12.21 failure event report */
	S_NM_NACK,		/* GSM 12.21 various NM_MT_*_NACK happened */
	S_NM_IPACC_NACK,	/* GSM 12.21 nanoBTS extensions NM_MT_IPACC_*_*_NACK happened */
	S_NM_IPACC_ACK,		/* GSM 12.21 nanoBTS extensions NM_MT_IPACC_*_*_ACK happened */
	S_NM_IPACC_RESTART_ACK, /* nanoBTS has send a restart ack */
	S_NM_IPACC_RESTART_NACK,/* nanoBTS has send a restart ack */
	S_NM_TEST_REP,		/* GSM 12.21 Test Report */
};

/* SS_LCHAN signals */
enum signal_lchan {
	/*
	 * The lchan got freed with an use_count != 0 and error
	 * recovery needs to be carried out from within the
	 * signal handler.
	 */
	S_LCHAN_UNEXPECTED_RELEASE,
	S_LCHAN_ACTIVATE_ACK,		/* 08.58 Channel Activate ACK */
	S_LCHAN_ACTIVATE_NACK,		/* 08.58 Channel Activate NACK */
	S_LCHAN_HANDOVER_COMPL,		/* 04.08 Handover Completed */
	S_LCHAN_HANDOVER_FAIL,		/* 04.08 Handover Failed */
	S_LCHAN_HANDOVER_DETECT,	/* 08.58 Handover Detect */
	S_LCHAN_MEAS_REP,		/* 08.58 Measurement Report */
};

/* SS_SUBSCR signals */
enum signal_subscr {
	S_SUBSCR_ATTACHED,
	S_SUBSCR_DETACHED,
	S_SUBSCR_IDENTITY,		/* we've received some identity information */
};

/* SS_SCALL signals */
enum signal_scall {
	S_SCALL_SUCCESS,
	S_SCALL_EXPIRED,
	S_SCALL_DETACHED,
};

enum signal_global {
	S_GLOBAL_SHUTDOWN,
};

typedef int signal_cbfn(unsigned int subsys, unsigned int signal,
			void *handler_data, void *signal_data);

struct paging_signal_data {
	struct gsm_subscriber *subscr;
	struct gsm_bts *bts;

	/* NULL in case the paging didn't work */
	struct gsm_lchan *lchan;
};

struct scall_signal_data {
	struct gsm_subscriber *subscr;
	struct gsm_lchan *lchan;
	void *data;
};

struct ipacc_ack_signal_data {
	struct gsm_bts *bts;
	u_int8_t msg_type;	
};

/* Management */
int register_signal_handler(unsigned int subsys, signal_cbfn *cbfn, void *data);
void unregister_signal_handler(unsigned int subsys, signal_cbfn *cbfn, void *data);

/* Dispatch */
void dispatch_signal(unsigned int subsys, unsigned int signal, void *signal_data);


#endif