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/* Network-specific handling of mobile-originated USSDs. */
/* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org>
* (C) 2008, 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2009 by Mike Haben <michael.haben@btinternet.com>
*
* 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.
*
*/
/* This module defines the network-specific handling of mobile-originated
USSD messages. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <openbsc/gsm_04_80.h>
#include <openbsc/gsm_subscriber.h>
#include <openbsc/debug.h>
/* Declarations of USSD strings to be recognised */
const char USSD_TEXT_OWN_NUMBER[] = "*#100#";
/* Forward declarations of network-specific handler functions */
static int send_own_number(struct msgb *msg);
/* Entrypoint - handler function common to all mobile-originated USSDs */
int handle_rcv_ussd(struct msgb *msg)
{
char *ussd_text_rcvd = gsm0480_rcv_ussd(msg);
if (ussd_text_rcvd[0] == 0xFF) /* Release-Complete */
return 0;
if (strstr(USSD_TEXT_OWN_NUMBER, ussd_text_rcvd) != NULL) {
DEBUGP(DMM, "USSD: Own number requested\n");
return send_own_number(msg);
} else {
DEBUGP(DMM, "Unhandled USSD %s\n", ussd_text_rcvd);
return gsm0480_send_ussd_reject(msg);
}
}
/* A network-specific handler function */
static int send_own_number(struct msgb *msg)
{
char *own_number = msg->lchan->subscr->extension;
/* Need trailing CR as EOT character */
char response_string[] = "Your extension is xxxxx\r";
memcpy(response_string + 18, own_number, 5);
return gsm0480_send_ussd_response(msg, response_string);
}
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