/*
 * In this module we handle the scenarios of themwi-mncc and/or themwi-mgw
 * shutting down while we are connected to them.  In both scenarios we
 * terminate all active calls (graceful disconnect signaling toward SIP
 * callers and toward whichever ThemWi daemon is still running, if either),
 * but our themwi-sip-in process itself stays running.  This way once
 * the other required processes restart, inbound calls will start working
 * once again, without needing to restart themwi-sip-in.
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <syslog.h>
#include "../include/mncc.h"
#include "../include/gsm48_const.h"
#include "call.h"

extern struct call *call_list;

static struct gsm_mncc_cause shutdown_cause = {
	.coding		= GSM48_CAUSE_CODING_GSM,
	.location	= GSM48_CAUSE_LOC_PRN_S_LU,
	.value		= GSM48_CC_CAUSE_NETWORK_OOO,
};

void
shutdown_gsm_conn()
{
	struct call *call;

	for (call = call_list; call; call = call->next) {
		call->mncc_state = MNCC_STATE_NO_EXIST;
		if (call->overall_state != OVERALL_STATE_DEAD_SIP) {
			call->overall_state = OVERALL_STATE_TEARDOWN;
			disconnect_tmgw(call);
			disconnect_sip(call, &shutdown_cause);
			transition_dead_sip(call);
		}
	}
}

void
shutdown_mgw_conn()
{
	struct call *call;

	for (call = call_list; call; call = call->next) {
		call->mgw_state = MGW_STATE_NO_EXIST;
		call->mgw_xact = 0;
		if (call->overall_state != OVERALL_STATE_DEAD_SIP) {
			call->overall_state = OVERALL_STATE_TEARDOWN;
			disconnect_mncc(call, GSM48_CAUSE_LOC_PRN_S_LU,
					GSM48_CC_CAUSE_NETWORK_OOO);
			disconnect_sip(call, &shutdown_cause);
			transition_dead_sip(call);
		}
	}
}