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/*
* (C) 2010 by Holger Hans Peter Freyther
* (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 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.
*
*/
#include <osmocom/core/application.h>
#include <osmocom/core/logging.h>
#include <osmocom/gsm/gsm0480.h>
#include <osmocom/gsm/gsm_utils.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static const uint8_t ussd_request[] = {
0x0b, 0x7b, 0x1c, 0x15, 0xa1, 0x13, 0x02, 0x01,
0x03, 0x02, 0x01, 0x3b, 0x30, 0x0b, 0x04, 0x01,
0x0f, 0x04, 0x06, 0x2a, 0xd5, 0x4c, 0x16, 0x1b,
0x01, 0x7f, 0x01, 0x00
};
static int parse_ussd(const uint8_t *_data, int len)
{
uint8_t *data;
int rc;
struct ussd_request req;
struct gsm48_hdr *hdr;
data = malloc(len);
memcpy(data, _data, len);
hdr = (struct gsm48_hdr *) &data[0];
rc = gsm0480_decode_ussd_request(hdr, len, &req);
free(data);
return rc;
}
static int parse_mangle_ussd(const uint8_t *_data, int len)
{
uint8_t *data;
int rc;
struct ussd_request req;
struct gsm48_hdr *hdr;
data = malloc(len);
memcpy(data, _data, len);
hdr = (struct gsm48_hdr *) &data[0];
hdr->data[1] = len - sizeof(*hdr) - 2;
rc = gsm0480_decode_ussd_request(hdr, len, &req);
free(data);
return rc;
}
struct log_info info = {};
static void test_7bit_ussd(const char *text, const char *encoded_hex, const char *appended_after_decode)
{
uint8_t coded[256];
char decoded[256];
int y;
printf("original = %s\n", osmo_hexdump((uint8_t *)text, strlen(text)));
gsm_7bit_encode_ussd(coded, text, &y);
printf("encoded = %s\n", osmo_hexdump(coded, y));
OSMO_ASSERT(strcmp(encoded_hex, osmo_hexdump_nospc(coded, y)) == 0);
gsm_7bit_decode_ussd(decoded, coded, y * 8 / 7);
y = strlen(decoded);
printf("decoded = %s\n\n", osmo_hexdump((uint8_t *)decoded, y));
OSMO_ASSERT(strncmp(text, decoded, strlen(text)) == 0);
OSMO_ASSERT(strcmp(appended_after_decode, decoded + strlen(text)) == 0);
}
int main(int argc, char **argv)
{
struct ussd_request req;
const int size = sizeof(ussd_request);
int i;
osmo_init_logging(&info);
gsm0480_decode_ussd_request((struct gsm48_hdr *) ussd_request, size, &req);
printf("Tested if it still works. Text was: %s\n", req.text);
printf("Testing parsing a USSD request and truncated versions\n");
for (i = size; i > sizeof(struct gsm48_hdr); --i) {
int rc = parse_ussd(&ussd_request[0], i);
printf("Result for %d is %d\n", rc, i);
}
printf("Mangling the container now\n");
for (i = size; i > sizeof(struct gsm48_hdr) + 2; --i) {
int rc = parse_mangle_ussd(&ussd_request[0], i);
printf("Result for %d is %d\n", rc, i);
}
printf("<CR> case test for 7 bit encode\n");
test_7bit_ussd("01234567", "b0986c46abd96e", "");
test_7bit_ussd("0123456", "b0986c46abd91a", "");
test_7bit_ussd("01234567\r", "b0986c46abd96e0d", "");
/* The appended \r is compliant to GSM 03.38 section 6.1.2.3.1: */
test_7bit_ussd("0123456\r", "b0986c46abd91a0d", "\r");
test_7bit_ussd("012345\r", "b0986c46ab351a", "");
return 0;
}
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