summaryrefslogtreecommitdiffstats
path: root/tests/ussd/ussd_test.c
blob: 23fd7393fc48f2d88d8734d24cff0455af1f2021 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
/*
 * (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 ussd_facility[] = {
	0x1b, 0x3a, 0x12, 0xa2, 0x10, 0x02, 0x01, 0x01,
	0x30, 0x0b, 0x02, 0x01, 0x3c, 0x30, 0x06, 0x04,
	0x01, 0x0f, 0x04, 0x01, 0x32
};

static const uint8_t ussd_release[] = {
	0x8b, 0x2a, 0x1c, 0x08, 0xa3, 0x06, 0x02, 0x01,
	0x05, 0x02, 0x01, 0x24
};

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);
	}
}

static void test_extract_ie_by_tag(void)
{
	uint16_t ie_len;
	uint8_t *ie;
	int rc;

	printf("[i] Testing gsm0480_extract_ie_by_tag()\n");

	/* REGISTER message with Facility IE */
	rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_request,
		sizeof(ussd_request), &ie, &ie_len, GSM0480_IE_FACILITY);
	OSMO_ASSERT(rc == 0);
	OSMO_ASSERT(ie != NULL && ie_len > 0);
	printf("[?] REGISTER message with Facility IE "
		"(len=%u): %s\n", ie_len, osmo_hexdump(ie, ie_len));

	/* REGISTER message with SS version IE */
	rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_request,
		sizeof(ussd_request), &ie, &ie_len, GSM0480_IE_SS_VERSION);
	OSMO_ASSERT(rc == 0);
	OSMO_ASSERT(ie != NULL && ie_len > 0);
	printf("[?] REGISTER message with SS version IE "
		"(len=%u): %s\n", ie_len, osmo_hexdump(ie, ie_len));

	/* REGISTER message with unknown IE */
	rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_request,
		sizeof(ussd_request), &ie, &ie_len, 0xff);
	OSMO_ASSERT(rc == 0);
	OSMO_ASSERT(ie == NULL && ie_len == 0);

	/* FACILITY message with Facility IE */
	rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_facility,
		sizeof(ussd_facility), &ie, &ie_len, GSM0480_IE_FACILITY);
	OSMO_ASSERT(rc == 0);
	OSMO_ASSERT(ie != NULL && ie_len > 0);
	printf("[?] FACILITY message with Facility IE "
		"(len=%u): %s\n", ie_len, osmo_hexdump(ie, ie_len));

	/* FACILITY message with unknown IE */
	rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_facility,
		sizeof(ussd_facility), &ie, &ie_len, 0xff);
	OSMO_ASSERT(rc == 0);
	OSMO_ASSERT(ie == NULL && ie_len == 0);

	/* RELEASE COMPLETE message with Facility IE */
	rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_release,
		sizeof(ussd_release), &ie, &ie_len, GSM0480_IE_FACILITY);
	OSMO_ASSERT(rc == 0);
	OSMO_ASSERT(ie != NULL && ie_len > 0);
	printf("[?] RELEASE COMPLETE message with Facility IE "
		"(len=%u): %s\n", ie_len, osmo_hexdump(ie, ie_len));

	/* RELEASE COMPLETE message without Facility IE */
	rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_release,
		sizeof(struct gsm48_hdr), &ie, &ie_len, GSM0480_IE_FACILITY);
	OSMO_ASSERT(rc == 0);
	OSMO_ASSERT(ie == NULL && ie_len == 0);

	printf("\n");
}

int main(int argc, char **argv)
{
	struct ss_request req;
	uint16_t size;
	int i;
	struct msgb *msg;
	void *ctx = talloc_named_const(NULL, 0, "ussd_test");

	osmo_init_logging2(ctx, &info);

	/* Test gsm0480_extract_ie_by_tag() */
	test_extract_ie_by_tag();

	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;
}