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
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
|
#pragma once
#include <stdint.h>
#include <string.h>
#include <osmocom/core/msgb.h>
/*! \defgroup tlv GSM L3 compatible TLV parser
* @{
*/
/*! \file tlv.h */
/* Terminology / wording
tag length value (in bits)
V - - 8
LV - 8 N * 8
TLV 8 8 N * 8
TL16V 8 16 N * 8
TLV16 8 8 N * 16
TvLV 8 8/16 N * 8
vTvLV 8/16 8/16 N * 8
*/
/*! \brief gross length of a LV type field */
#define LV_GROSS_LEN(x) (x+1)
/*! \brief gross length of a TLV type field */
#define TLV_GROSS_LEN(x) (x+2)
/*! \brief gross length of a TLV16 type field */
#define TLV16_GROSS_LEN(x) ((2*x)+2)
/*! \brief gross length of a TL16V type field */
#define TL16V_GROSS_LEN(x) (x+3)
/*! \brief gross length of a L16TV type field */
#define L16TV_GROSS_LEN(x) (x+3)
/*! \brief maximum length of TLV of one byte length */
#define TVLV_MAX_ONEBYTE 0x7f
/*! \brief gross length of a TVLV type field */
static inline uint16_t TVLV_GROSS_LEN(uint16_t len)
{
if (len <= TVLV_MAX_ONEBYTE)
return TLV_GROSS_LEN(len);
else
return TL16V_GROSS_LEN(len);
}
/*! \brief gross length of vTvL header (tag+len) */
static inline uint16_t VTVL_GAN_GROSS_LEN(uint16_t tag, uint16_t len)
{
uint16_t ret = 2;
if (tag > TVLV_MAX_ONEBYTE)
ret++;
if (len > TVLV_MAX_ONEBYTE)
ret++;
return ret;
}
/*! \brief gross length of vTvLV (tag+len+val) */
static inline uint16_t VTVLV_GAN_GROSS_LEN(uint16_t tag, uint16_t len)
{
uint16_t ret;
if (len <= TVLV_MAX_ONEBYTE)
return TLV_GROSS_LEN(len);
else
return TL16V_GROSS_LEN(len);
if (tag > TVLV_MAX_ONEBYTE)
ret += 1;
return ret;
}
/* TLV generation */
/*! \brief put (append) a LV field */
static inline uint8_t *lv_put(uint8_t *buf, uint8_t len,
const uint8_t *val)
{
*buf++ = len;
memcpy(buf, val, len);
return buf + len;
}
/*! \brief put (append) a TLV field */
static inline uint8_t *tlv_put(uint8_t *buf, uint8_t tag, uint8_t len,
const uint8_t *val)
{
*buf++ = tag;
*buf++ = len;
memcpy(buf, val, len);
return buf + len;
}
/*! \brief put (append) a TLV16 field */
static inline uint8_t *tlv16_put(uint8_t *buf, uint8_t tag, uint8_t len,
const uint16_t *val)
{
*buf++ = tag;
*buf++ = len;
memcpy(buf, val, len*2);
return buf + len*2;
}
/*! \brief put (append) a TL16V field */
static inline uint8_t *tl16v_put(uint8_t *buf, uint8_t tag, uint16_t len,
const uint8_t *val)
{
*buf++ = tag;
*buf++ = len >> 8;
*buf++ = len & 0xff;
memcpy(buf, val, len);
return buf + len*2;
}
/*! \brief put (append) a TvLV field */
static inline uint8_t *tvlv_put(uint8_t *buf, uint8_t tag, uint16_t len,
const uint8_t *val)
{
uint8_t *ret;
if (len <= TVLV_MAX_ONEBYTE) {
ret = tlv_put(buf, tag, len, val);
buf[1] |= 0x80;
} else
ret = tl16v_put(buf, tag, len, val);
return ret;
}
/*! \brief put (append) a variable-length tag or variable-length length * */
static inline uint8_t *vt_gan_put(uint8_t *buf, uint16_t tag)
{
if (tag > TVLV_MAX_ONEBYTE) {
/* two-byte TAG */
*buf++ = 0x80 | (tag >> 8);
*buf++ = (tag & 0xff);
} else
*buf++ = tag;
return buf;
}
/* \brief put (append) vTvL (GAN) field (tag + length)*/
static inline uint8_t *vtvl_gan_put(uint8_t *buf, uint16_t tag, uint16_t len)
{
uint8_t *ret;
ret = vt_gan_put(buf, tag);
return vt_gan_put(ret, len);
}
/* \brief put (append) vTvLV (GAN) field (tag + length + val) */
static inline uint8_t *vtvlv_gan_put(uint8_t *buf, uint16_t tag, uint16_t len,
const uint8_t *val)
{
uint8_t *ret;
ret = vtvl_gan_put(buf, tag, len );
memcpy(ret, val, len);
ret = buf + len;
return ret;
}
/*! \brief put (append) a TLV16 field to \ref msgb */
static inline uint8_t *msgb_tlv16_put(struct msgb *msg, uint8_t tag, uint8_t len, const uint16_t *val)
{
uint8_t *buf = msgb_put(msg, TLV16_GROSS_LEN(len));
return tlv16_put(buf, tag, len, val);
}
/*! \brief put (append) a TL16V field to \ref msgb */
static inline uint8_t *msgb_tl16v_put(struct msgb *msg, uint8_t tag, uint16_t len,
const uint8_t *val)
{
uint8_t *buf = msgb_put(msg, TL16V_GROSS_LEN(len));
return tl16v_put(buf, tag, len, val);
}
/*! \brief put (append) a TvLV field to \ref msgb */
static inline uint8_t *msgb_tvlv_put(struct msgb *msg, uint8_t tag, uint16_t len,
const uint8_t *val)
{
uint8_t *buf = msgb_put(msg, TVLV_GROSS_LEN(len));
return tvlv_put(buf, tag, len, val);
}
/*! \brief put (append) a vTvLV field to \ref msgb */
static inline uint8_t *msgb_vtvlv_gan_put(struct msgb *msg, uint16_t tag,
uint16_t len, const uint8_t *val)
{
uint8_t *buf = msgb_put(msg, VTVLV_GAN_GROSS_LEN(tag, len));
return vtvlv_gan_put(buf, tag, len, val);
}
/*! \brief put (append) a L16TV field to \ref msgb */
static inline uint8_t *msgb_l16tv_put(struct msgb *msg, uint16_t len, uint8_t tag,
const uint8_t *val)
{
uint8_t *buf = msgb_put(msg, L16TV_GROSS_LEN(len));
*buf++ = len >> 8;
*buf++ = len & 0xff;
*buf++ = tag;
memcpy(buf, val, len);
return buf + len;
}
/*! \brief put (append) a V field */
static inline uint8_t *v_put(uint8_t *buf, uint8_t val)
{
*buf++ = val;
return buf;
}
/*! \brief put (append) a TV field */
static inline uint8_t *tv_put(uint8_t *buf, uint8_t tag,
uint8_t val)
{
*buf++ = tag;
*buf++ = val;
return buf;
}
/*! \brief put (append) a TVfixed field */
static inline uint8_t *tv_fixed_put(uint8_t *buf, uint8_t tag,
unsigned int len, const uint8_t *val)
{
*buf++ = tag;
memcpy(buf, val, len);
return buf + len;
}
/*! \brief put (append) a TV16 field
* \param[in,out] buf data buffer
* \param[in] tag Tag value
* \param[in] val Value (in host byte order!)
*/
static inline uint8_t *tv16_put(uint8_t *buf, uint8_t tag,
uint16_t val)
{
*buf++ = tag;
*buf++ = val >> 8;
*buf++ = val & 0xff;
return buf;
}
/*! \brief put (append) a LV field to a \ref msgb
* \returns pointer to first byte after newly-put information */
static inline uint8_t *msgb_lv_put(struct msgb *msg, uint8_t len, const uint8_t *val)
{
uint8_t *buf = msgb_put(msg, LV_GROSS_LEN(len));
return lv_put(buf, len, val);
}
/*! \brief put (append) a TLV field to a \ref msgb
* \returns pointer to first byte after newly-put information */
static inline uint8_t *msgb_tlv_put(struct msgb *msg, uint8_t tag, uint8_t len, const uint8_t *val)
{
uint8_t *buf = msgb_put(msg, TLV_GROSS_LEN(len));
return tlv_put(buf, tag, len, val);
}
/*! \brief put (append) a TV field to a \ref msgb
* \returns pointer to first byte after newly-put information */
static inline uint8_t *msgb_tv_put(struct msgb *msg, uint8_t tag, uint8_t val)
{
uint8_t *buf = msgb_put(msg, 2);
return tv_put(buf, tag, val);
}
/*! \brief put (append) a TVfixed field to a \ref msgb
* \returns pointer to first byte after newly-put information */
static inline uint8_t *msgb_tv_fixed_put(struct msgb *msg, uint8_t tag,
unsigned int len, const uint8_t *val)
{
uint8_t *buf = msgb_put(msg, 1+len);
return tv_fixed_put(buf, tag, len, val);
}
/*! \brief put (append) a V field to a \ref msgb
* \returns pointer to first byte after newly-put information */
static inline uint8_t *msgb_v_put(struct msgb *msg, uint8_t val)
{
uint8_t *buf = msgb_put(msg, 1);
return v_put(buf, val);
}
/*! \brief put (append) a TV16 field to a \ref msgb
* \returns pointer to first byte after newly-put information */
static inline uint8_t *msgb_tv16_put(struct msgb *msg, uint8_t tag, uint16_t val)
{
uint8_t *buf = msgb_put(msg, 3);
return tv16_put(buf, tag, val);
}
/*! \brief push (prepend) a TLV field to a \ref msgb
* \returns pointer to first byte of newly-pushed information */
static inline uint8_t *msgb_tlv_push(struct msgb *msg, uint8_t tag, uint8_t len, const uint8_t *val)
{
uint8_t *buf = msgb_push(msg, TLV_GROSS_LEN(len));
tlv_put(buf, tag, len, val);
return buf;
}
/*! \brief push (prepend) a TV field to a \ref msgb
* \returns pointer to first byte of newly-pushed information */
static inline uint8_t *msgb_tv_push(struct msgb *msg, uint8_t tag, uint8_t val)
{
uint8_t *buf = msgb_push(msg, 2);
tv_put(buf, tag, val);
return buf;
}
/*! \brief push (prepend) a TV16 field to a \ref msgb
* \returns pointer to first byte of newly-pushed information */
static inline uint8_t *msgb_tv16_push(struct msgb *msg, uint8_t tag, uint16_t val)
{
uint8_t *buf = msgb_push(msg, 3);
tv16_put(buf, tag, val);
return buf;
}
/*! \brief push (prepend) a TvLV field to a \ref msgb
* \returns pointer to first byte of newly-pushed information */
static inline uint8_t *msgb_tvlv_push(struct msgb *msg, uint8_t tag, uint16_t len,
const uint8_t *val)
{
uint8_t *buf = msgb_push(msg, TVLV_GROSS_LEN(len));
tvlv_put(buf, tag, len, val);
return buf;
}
/* \brief push (prepend) a vTvL header to a \ref msgb
*/
static inline uint8_t *msgb_vtvl_gan_push(struct msgb *msg, uint16_t tag,
uint16_t len)
{
uint8_t *buf = msgb_push(msg, VTVL_GAN_GROSS_LEN(tag, len));
vtvl_gan_put(buf, tag, len);
return buf;
}
static inline uint8_t *msgb_vtvlv_gan_push(struct msgb *msg, uint16_t tag,
uint16_t len, const uint8_t *val)
{
uint8_t *buf = msgb_push(msg, VTVLV_GAN_GROSS_LEN(tag, len));
vtvlv_gan_put(buf, tag, len, val);
return buf;
}
/* TLV parsing */
/*! \brief Entry in a TLV parser array */
struct tlv_p_entry {
uint16_t len; /*!< \brief length */
const uint8_t *val; /*!< \brief pointer to value */
};
/*! \brief TLV type */
enum tlv_type {
TLV_TYPE_NONE, /*!< \brief no type */
TLV_TYPE_FIXED, /*!< \brief fixed-length value-only */
TLV_TYPE_T, /*!< \brief tag-only */
TLV_TYPE_TV, /*!< \brief tag-value (8bit) */
TLV_TYPE_TLV, /*!< \brief tag-length-value */
TLV_TYPE_TL16V, /*!< \brief tag, 16 bit length, value */
TLV_TYPE_TvLV, /*!< \brief tag, variable length, value */
TLV_TYPE_SINGLE_TV, /*!< \brief tag and value (both 4 bit) in 1 byte */
TLV_TYPE_vTvLV_GAN, /*!< \brief variable-length tag, variable-length length */
};
/*! \brief Definition of a single IE (Information Element) */
struct tlv_def {
enum tlv_type type; /*!< \brief TLV type */
uint8_t fixed_len; /*!< \brief length in case of \ref TLV_TYPE_FIXED */
};
/*! \brief Definition of All 256 IE / TLV */
struct tlv_definition {
struct tlv_def def[256];
};
/*! \brief result of the TLV parser */
struct tlv_parsed {
struct tlv_p_entry lv[256];
};
extern struct tlv_definition tvlv_att_def;
extern struct tlv_definition vtvlv_gan_att_def;
int tlv_parse_one(uint8_t *o_tag, uint16_t *o_len, const uint8_t **o_val,
const struct tlv_definition *def,
const uint8_t *buf, int buf_len);
int tlv_parse(struct tlv_parsed *dec, const struct tlv_definition *def,
const uint8_t *buf, int buf_len, uint8_t lv_tag, uint8_t lv_tag2);
/* take a master (src) tlvdev and fill up all empty slots in 'dst' */
void tlv_def_patch(struct tlv_definition *dst, const struct tlv_definition *src);
#define TLVP_PRESENT(x, y) ((x)->lv[y].val)
#define TLVP_LEN(x, y) (x)->lv[y].len
#define TLVP_VAL(x, y) (x)->lv[y].val
/*! \brief Align given TLV element with 16 bit value to an even address
* \param[in] tp pointer to \ref tlv_parsed
* \param[in] pos element to return
* \returns aligned 16 bit value
*/
static inline uint16_t tlvp_val16_unal(const struct tlv_parsed *tp, int pos)
{
uint16_t res;
memcpy(&res, TLVP_VAL(tp, pos), sizeof(res));
return res;
}
/*! \brief Align given TLV element with 32 bit value to an address that is a multiple of 4
* \param[in] tp pointer to \ref tlv_parsed
* \param[in] pos element to return
* \returns aligned 32 bit value
*/
static inline uint32_t tlvp_val32_unal(const struct tlv_parsed *tp, int pos)
{
uint32_t res;
memcpy(&res, TLVP_VAL(tp, pos), sizeof(res));
return res;
}
/*! @} */
|
