| /* |
| * (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 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); |
| octets_written = strlen(decoded); |
| printf("decoded = %s\n\n", osmo_hexdump((uint8_t *)decoded, octets_written)); |
| |
| 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 ussd_request req; |
| const int size = sizeof(ussd_request); |
| int i; |
| struct msgb *msg; |
| |
| 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", ""); |
| |
| 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; |
| } |