summaryrefslogtreecommitdiffstats
path: root/tools/usb/usbip/libsrc/names.c
blob: aba7f4188044c9bbdfde581452ca06c6b53c353c (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
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
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *      names.c  --  USB name database manipulation routines
 *
 *      Copyright (C) 1999, 2000  Thomas Sailer (sailer@ife.ee.ethz.ch)
 *
 *	Copyright (C) 2005 Takahiro Hirofuchi
 *		- names_deinit() is added.
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>

#include "names.h"
#include "usbip_common.h"

struct vendor {
	struct vendor *next;
	u_int16_t vendorid;
	char name[1];
};

struct product {
	struct product *next;
	u_int16_t vendorid, productid;
	char name[1];
};

struct class {
	struct class *next;
	u_int8_t classid;
	char name[1];
};

struct subclass {
	struct subclass *next;
	u_int8_t classid, subclassid;
	char name[1];
};

struct protocol {
	struct protocol *next;
	u_int8_t classid, subclassid, protocolid;
	char name[1];
};

struct genericstrtable {
	struct genericstrtable *next;
	unsigned int num;
	char name[1];
};


#define HASH1  0x10
#define HASH2  0x02
#define HASHSZ 16

static unsigned int hashnum(unsigned int num)
{
	unsigned int mask1 = HASH1 << 27, mask2 = HASH2 << 27;

	for (; mask1 >= HASH1; mask1 >>= 1, mask2 >>= 1)
		if (num & mask1)
			num ^= mask2;
	return num & (HASHSZ-1);
}


static struct vendor *vendors[HASHSZ] = { NULL, };
static struct product *products[HASHSZ] = { NULL, };
static struct class *classes[HASHSZ] = { NULL, };
static struct subclass *subclasses[HASHSZ] = { NULL, };
static struct protocol *protocols[HASHSZ] = { NULL, };

const char *names_vendor(u_int16_t vendorid)
{
	struct vendor *v;

	v = vendors[hashnum(vendorid)];
	for (; v; v = v->next)
		if (v->vendorid == vendorid)
			return v->name;
	return NULL;
}

const char *names_product(u_int16_t vendorid, u_int16_t productid)
{
	struct product *p;

	p = products[hashnum((vendorid << 16) | productid)];
	for (; p; p = p->next)
		if (p->vendorid == vendorid && p->productid == productid)
			return p->name;
	return NULL;
}

const char *names_class(u_int8_t classid)
{
	struct class *c;

	c = classes[hashnum(classid)];
	for (; c; c = c->next)
		if (c->classid == classid)
			return c->name;
	return NULL;
}

const char *names_subclass(u_int8_t classid, u_int8_t subclassid)
{
	struct subclass *s;

	s = subclasses[hashnum((classid << 8) | subclassid)];
	for (; s; s = s->next)
		if (s->classid == classid && s->subclassid == subclassid)
			return s->name;
	return NULL;
}

const char *names_protocol(u_int8_t classid, u_int8_t subclassid,
			   u_int8_t protocolid)
{
	struct protocol *p;

	p = protocols[hashnum((classid << 16) | (subclassid << 8)
			      | protocolid)];
	for (; p; p = p->next)
		if (p->classid == classid && p->subclassid == subclassid &&
		    p->protocolid == protocolid)
			return p->name;
	return NULL;
}

/* add a cleanup function by takahiro */
struct pool {
	struct pool *next;
	void *mem;
};

static struct pool *pool_head;

static void *my_malloc(size_t size)
{
	struct pool *p;

	p = calloc(1, sizeof(struct pool));
	if (!p)
		return NULL;

	p->mem = calloc(1, size);
	if (!p->mem) {
		free(p);
		return NULL;
	}

	p->next = pool_head;
	pool_head = p;

	return p->mem;
}

void names_free(void)
{
	struct pool *pool;

	if (!pool_head)
		return;

	for (pool = pool_head; pool != NULL; ) {
		struct pool *tmp;

		if (pool->mem)
			free(pool->mem);

		tmp = pool;
		pool = pool->next;
		free(tmp);
	}
}

static int new_vendor(const char *name, u_int16_t vendorid)
{
	struct vendor *v;
	unsigned int h = hashnum(vendorid);

	v = vendors[h];
	for (; v; v = v->next)
		if (v->vendorid == vendorid)
			return -1;
	v = my_malloc(sizeof(struct vendor) + strlen(name));
	if (!v)
		return -1;
	strcpy(v->name, name);
	v->vendorid = vendorid;
	v->next = vendors[h];
	vendors[h] = v;
	return 0;
}

static int new_product(const char *name, u_int16_t vendorid,
		       u_int16_t productid)
{
	struct product *p;
	unsigned int h = hashnum((vendorid << 16) | productid);

	p = products[h];
	for (; p; p = p->next)
		if (p->vendorid == vendorid && p->productid == productid)
			return -1;
	p = my_malloc(sizeof(struct product) + strlen(name));
	if (!p)
		return -1;
	strcpy(p->name, name);
	p->vendorid = vendorid;
	p->productid = productid;
	p->next = products[h];
	products[h] = p;
	return 0;
}

static int new_class(const char *name, u_int8_t classid)
{
	struct class *c;
	unsigned int h = hashnum(classid);

	c = classes[h];
	for (; c; c = c->next)
		if (c->classid == classid)
			return -1;
	c = my_malloc(sizeof(struct class) + strlen(name));
	if (!c)
		return -1;
	strcpy(c->name, name);
	c->classid = classid;
	c->next = classes[h];
	classes[h] = c;
	return 0;
}

static int new_subclass(const char *name, u_int8_t classid, u_int8_t subclassid)
{
	struct subclass *s;
	unsigned int h = hashnum((classid << 8) | subclassid);

	s = subclasses[h];
	for (; s; s = s->next)
		if (s->classid == classid && s->subclassid == subclassid)
			return -1;
	s = my_malloc(sizeof(struct subclass) + strlen(name));
	if (!s)
		return -1;
	strcpy(s->name, name);
	s->classid = classid;
	s->subclassid = subclassid;
	s->next = subclasses[h];
	subclasses[h] = s;
	return 0;
}

static int new_protocol(const char *name, u_int8_t classid, u_int8_t subclassid,
			u_int8_t protocolid)
{
	struct protocol *p;
	unsigned int h = hashnum((classid << 16) | (subclassid << 8)
				 | protocolid);

	p = protocols[h];
	for (; p; p = p->next)
		if (p->classid == classid && p->subclassid == subclassid
		    && p->protocolid == protocolid)
			return -1;
	p = my_malloc(sizeof(struct protocol) + strlen(name));
	if (!p)
		return -1;
	strcpy(p->name, name);
	p->classid = classid;
	p->subclassid = subclassid;
	p->protocolid = protocolid;
	p->next = protocols[h];
	protocols[h] = p;
	return 0;
}

static void parse(FILE *f)
{
	char buf[512], *cp;
	unsigned int linectr = 0;
	int lastvendor = -1;
	int lastclass = -1;
	int lastsubclass = -1;
	int lasthut = -1;
	int lastlang = -1;
	unsigned int u;

	while (fgets(buf, sizeof(buf), f)) {
		linectr++;
		/* remove line ends */
		cp = strchr(buf, '\r');
		if (cp)
			*cp = 0;
		cp = strchr(buf, '\n');
		if (cp)
			*cp = 0;
		if (buf[0] == '#' || !buf[0])
			continue;
		cp = buf;
		if (buf[0] == 'P' && buf[1] == 'H' && buf[2] == 'Y' &&
		    buf[3] == 'S' && buf[4] == 'D' &&
		    buf[5] == 'E' && buf[6] == 'S' && /*isspace(buf[7])*/
		    buf[7] == ' ') {
			continue;
		}
		if (buf[0] == 'P' && buf[1] == 'H' &&
		    buf[2] == 'Y' && /*isspace(buf[3])*/ buf[3] == ' ') {
			continue;
		}
		if (buf[0] == 'B' && buf[1] == 'I' && buf[2] == 'A' &&
		    buf[3] == 'S' && /*isspace(buf[4])*/ buf[4] == ' ') {
			continue;
		}
		if (buf[0] == 'L' && /*isspace(buf[1])*/ buf[1] == ' ') {
			lasthut = lastclass = lastvendor = lastsubclass = -1;
			/*
			 * set 1 as pseudo-id to indicate that the parser is
			 * in a `L' section.
			 */
			lastlang = 1;
			continue;
		}
		if (buf[0] == 'C' && /*isspace(buf[1])*/ buf[1] == ' ') {
			/* class spec */
			cp = buf+2;
			while (isspace(*cp))
				cp++;
			if (!isxdigit(*cp)) {
				err("Invalid class spec at line %u", linectr);
				continue;
			}
			u = strtoul(cp, &cp, 16);
			while (isspace(*cp))
				cp++;
			if (!*cp) {
				err("Invalid class spec at line %u", linectr);
				continue;
			}
			if (new_class(cp, u))
				err("Duplicate class spec at line %u class %04x %s",
				    linectr, u, cp);
			dbg("line %5u class %02x %s", linectr, u, cp);
			lasthut = lastlang = lastvendor = lastsubclass = -1;
			lastclass = u;
			continue;
		}
		if (buf[0] == 'A' && buf[1] == 'T' && isspace(buf[2])) {
			/* audio terminal type spec */
			continue;
		}
		if (buf[0] == 'H' && buf[1] == 'C' && buf[2] == 'C'
		    && isspace(buf[3])) {
			/* HID Descriptor bCountryCode */
			continue;
		}
		if (isxdigit(*cp)) {
			/* vendor */
			u = strtoul(cp, &cp, 16);
			while (isspace(*cp))
				cp++;
			if (!*cp) {
				err("Invalid vendor spec at line %u", linectr);
				continue;
			}
			if (new_vendor(cp, u))
				err("Duplicate vendor spec at line %u vendor %04x %s",
				    linectr, u, cp);
			dbg("line %5u vendor %04x %s", linectr, u, cp);
			lastvendor = u;
			lasthut = lastlang = lastclass = lastsubclass = -1;
			continue;
		}
		if (buf[0] == '\t' && isxdigit(buf[1])) {
			/* product or subclass spec */
			u = strtoul(buf+1, &cp, 16);
			while (isspace(*cp))
				cp++;
			if (!*cp) {
				err("Invalid product/subclass spec at line %u",
				    linectr);
				continue;
			}
			if (lastvendor != -1) {
				if (new_product(cp, lastvendor, u))
					err("Duplicate product spec at line %u product %04x:%04x %s",
					    linectr, lastvendor, u, cp);
				dbg("line %5u product %04x:%04x %s", linectr,
				    lastvendor, u, cp);
				continue;
			}
			if (lastclass != -1) {
				if (new_subclass(cp, lastclass, u))
					err("Duplicate subclass spec at line %u class %02x:%02x %s",
					    linectr, lastclass, u, cp);
				dbg("line %5u subclass %02x:%02x %s", linectr,
				    lastclass, u, cp);
				lastsubclass = u;
				continue;
			}
			if (lasthut != -1) {
				/* do not store hut */
				continue;
			}
			if (lastlang != -1) {
				/* do not store langid */
				continue;
			}
			err("Product/Subclass spec without prior Vendor/Class spec at line %u",
			    linectr);
			continue;
		}
		if (buf[0] == '\t' && buf[1] == '\t' && isxdigit(buf[2])) {
			/* protocol spec */
			u = strtoul(buf+2, &cp, 16);
			while (isspace(*cp))
				cp++;
			if (!*cp) {
				err("Invalid protocol spec at line %u",
				    linectr);
				continue;
			}
			if (lastclass != -1 && lastsubclass != -1) {
				if (new_protocol(cp, lastclass, lastsubclass,
						 u))
					err("Duplicate protocol spec at line %u class %02x:%02x:%02x %s",
					    linectr, lastclass, lastsubclass,
					    u, cp);
				dbg("line %5u protocol %02x:%02x:%02x %s",
				    linectr, lastclass, lastsubclass, u, cp);
				continue;
			}
			err("Protocol spec without prior Class and Subclass spec at line %u",
			    linectr);
			continue;
		}
		if (buf[0] == 'H' && buf[1] == 'I' &&
		    buf[2] == 'D' && /*isspace(buf[3])*/ buf[3] == ' ') {
			continue;
		}
		if (buf[0] == 'H' && buf[1] == 'U' &&
		    buf[2] == 'T' && /*isspace(buf[3])*/ buf[3] == ' ') {
			lastlang = lastclass = lastvendor = lastsubclass = -1;
			/*
			 * set 1 as pseudo-id to indicate that the parser is
			 * in a `HUT' section.
			 */
			lasthut = 1;
			continue;
		}
		if (buf[0] == 'R' && buf[1] == ' ')
			continue;

		if (buf[0] == 'V' && buf[1] == 'T')
			continue;

		err("Unknown line at line %u", linectr);
	}
}


int names_init(char *n)
{
	FILE *f;

	f = fopen(n, "r");
	if (!f)
		return errno;

	parse(f);
	fclose(f);
	return 0;
}