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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 const uint8_t interrogate_ss[] = {
0x0b, 0x7b, 0x1c, 0x0d, 0xa1, 0x0b, 0x02, 0x01,
0x03, 0x02, 0x01, 0x0e, 0x30, 0x03, 0x04, 0x01,
0x21, 0x7f, 0x01, 0x00
};
static int parse_ussd(const uint8_t *_data, int len)
{
uint8_t *data;
int rc;
struct ss_request req;
struct gsm48_hdr *hdr;
data = malloc(len);
memcpy(data, _data, len);
hdr = (struct gsm48_hdr *) &data[0];
rc = gsm0480_decode_ss_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 ss_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_ss_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 octets_written;
int buffer_size;
int nchars;
printf("original = %s\n", osmo_hexdump((uint8_t *)text, strlen(text)));
gsm_7bit_encode_n_ussd(coded, sizeof(coded), text, &octets_written);
printf("encoded = %s\n", osmo_hexdump(coded, octets_written));
OSMO_ASSERT(strcmp(encoded_hex, osmo_hexdump_nospc(coded, octets_written)) == 0);
gsm_7bit_decode_n_ussd(decoded, sizeof(decoded), coded, octets_written * 8 / 7);
printf("decoded = %s\n\n", osmo_hexdump((uint8_t *)decoded, strlen(decoded)));
OSMO_ASSERT(strncmp(text, decoded, strlen(text)) == 0);
OSMO_ASSERT(strcmp(appended_after_decode, decoded + strlen(text)) == 0);
/* check buffer limiting */
memset(decoded, 0xaa, sizeof(decoded));
for (buffer_size = 1; buffer_size < sizeof(decoded) - 1; ++buffer_size)
{
nchars = gsm_7bit_decode_n_ussd(decoded, buffer_size, coded, octets_written * 8 / 7);
OSMO_ASSERT(nchars <= buffer_size);
OSMO_ASSERT(decoded[buffer_size] == (char)0xaa);
OSMO_ASSERT(decoded[nchars] == '\0');
}
memset(coded, 0xaa, sizeof(coded));
for (buffer_size = 0; buffer_size < sizeof(coded) - 1; ++buffer_size)
{
gsm_7bit_encode_n_ussd(coded, buffer_size, text, &octets_written);
OSMO_ASSERT(octets_written <= buffer_size);
OSMO_ASSERT(coded[buffer_size] == 0xaa);
}
}
int main(int argc, char **argv)
{
struct ss_request req;
uint16_t size;
int i;
struct msgb *msg;
osmo_init_logging(&info);
memset(&req, 0, sizeof(req));
gsm0480_decode_ss_request((struct gsm48_hdr *) ussd_request,
sizeof(ussd_request), &req);
printf("Tested if it still works. Text was: %s\n", req.ussd_text);
memset(&req, 0, sizeof(req));
gsm0480_decode_ss_request((struct gsm48_hdr *) interrogate_ss,
sizeof(interrogate_ss), &req);
OSMO_ASSERT(strlen((char *) req.ussd_text) == 0);
OSMO_ASSERT(req.ss_code == 33);
printf("interrogateSS CFU text..'%s' code %d\n", req.ussd_text, req.ss_code);
printf("Testing parsing a USSD request and truncated versions\n");
size = sizeof(ussd_request);
for (i = size; i > sizeof(struct gsm48_hdr); --i) {
int rc = parse_ussd(&ussd_request[0], i);
printf("Result for len=%d is %d\n", i, rc);
}
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 len=%d is %d\n", i, rc);
}
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", "");
printf("Checking GSM 04.80 USSD message generation.\n");
test_7bit_ussd("", "", "");
msg = gsm0480_create_unstructuredSS_Notify (0x00, "");
printf ("Created unstructuredSS_Notify (0x00): %s\n",
osmo_hexdump(msgb_data(msg), msgb_length(msg)));
msgb_free (msg);
test_7bit_ussd("forty-two", "e6b79c9e6fd1ef6f", "");
msg = gsm0480_create_unstructuredSS_Notify (0x42, "forty-two");
printf ("Created unstructuredSS_Notify (0x42): %s\n",
osmo_hexdump(msgb_data(msg), msgb_length(msg)));
msgb_free (msg);
return 0;
}
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