treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61
[linux-block.git] / tools / usb / usbip / libsrc / names.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *      names.c  --  USB name database manipulation routines
4  *
5  *      Copyright (C) 1999, 2000  Thomas Sailer (sailer@ife.ee.ethz.ch)
6  *
7  *      Copyright (C) 2005 Takahiro Hirofuchi
8  *              - names_deinit() is added.
9  */
10
11 #include <sys/types.h>
12 #include <sys/stat.h>
13 #include <fcntl.h>
14 #include <dirent.h>
15 #include <string.h>
16 #include <errno.h>
17 #include <stdlib.h>
18 #include <unistd.h>
19 #include <stdio.h>
20 #include <ctype.h>
21
22 #include "names.h"
23 #include "usbip_common.h"
24
25 struct vendor {
26         struct vendor *next;
27         u_int16_t vendorid;
28         char name[1];
29 };
30
31 struct product {
32         struct product *next;
33         u_int16_t vendorid, productid;
34         char name[1];
35 };
36
37 struct class {
38         struct class *next;
39         u_int8_t classid;
40         char name[1];
41 };
42
43 struct subclass {
44         struct subclass *next;
45         u_int8_t classid, subclassid;
46         char name[1];
47 };
48
49 struct protocol {
50         struct protocol *next;
51         u_int8_t classid, subclassid, protocolid;
52         char name[1];
53 };
54
55 struct genericstrtable {
56         struct genericstrtable *next;
57         unsigned int num;
58         char name[1];
59 };
60
61
62 #define HASH1  0x10
63 #define HASH2  0x02
64 #define HASHSZ 16
65
66 static unsigned int hashnum(unsigned int num)
67 {
68         unsigned int mask1 = HASH1 << 27, mask2 = HASH2 << 27;
69
70         for (; mask1 >= HASH1; mask1 >>= 1, mask2 >>= 1)
71                 if (num & mask1)
72                         num ^= mask2;
73         return num & (HASHSZ-1);
74 }
75
76
77 static struct vendor *vendors[HASHSZ] = { NULL, };
78 static struct product *products[HASHSZ] = { NULL, };
79 static struct class *classes[HASHSZ] = { NULL, };
80 static struct subclass *subclasses[HASHSZ] = { NULL, };
81 static struct protocol *protocols[HASHSZ] = { NULL, };
82
83 const char *names_vendor(u_int16_t vendorid)
84 {
85         struct vendor *v;
86
87         v = vendors[hashnum(vendorid)];
88         for (; v; v = v->next)
89                 if (v->vendorid == vendorid)
90                         return v->name;
91         return NULL;
92 }
93
94 const char *names_product(u_int16_t vendorid, u_int16_t productid)
95 {
96         struct product *p;
97
98         p = products[hashnum((vendorid << 16) | productid)];
99         for (; p; p = p->next)
100                 if (p->vendorid == vendorid && p->productid == productid)
101                         return p->name;
102         return NULL;
103 }
104
105 const char *names_class(u_int8_t classid)
106 {
107         struct class *c;
108
109         c = classes[hashnum(classid)];
110         for (; c; c = c->next)
111                 if (c->classid == classid)
112                         return c->name;
113         return NULL;
114 }
115
116 const char *names_subclass(u_int8_t classid, u_int8_t subclassid)
117 {
118         struct subclass *s;
119
120         s = subclasses[hashnum((classid << 8) | subclassid)];
121         for (; s; s = s->next)
122                 if (s->classid == classid && s->subclassid == subclassid)
123                         return s->name;
124         return NULL;
125 }
126
127 const char *names_protocol(u_int8_t classid, u_int8_t subclassid,
128                            u_int8_t protocolid)
129 {
130         struct protocol *p;
131
132         p = protocols[hashnum((classid << 16) | (subclassid << 8)
133                               | protocolid)];
134         for (; p; p = p->next)
135                 if (p->classid == classid && p->subclassid == subclassid &&
136                     p->protocolid == protocolid)
137                         return p->name;
138         return NULL;
139 }
140
141 /* add a cleanup function by takahiro */
142 struct pool {
143         struct pool *next;
144         void *mem;
145 };
146
147 static struct pool *pool_head;
148
149 static void *my_malloc(size_t size)
150 {
151         struct pool *p;
152
153         p = calloc(1, sizeof(struct pool));
154         if (!p)
155                 return NULL;
156
157         p->mem = calloc(1, size);
158         if (!p->mem) {
159                 free(p);
160                 return NULL;
161         }
162
163         p->next = pool_head;
164         pool_head = p;
165
166         return p->mem;
167 }
168
169 void names_free(void)
170 {
171         struct pool *pool;
172
173         if (!pool_head)
174                 return;
175
176         for (pool = pool_head; pool != NULL; ) {
177                 struct pool *tmp;
178
179                 if (pool->mem)
180                         free(pool->mem);
181
182                 tmp = pool;
183                 pool = pool->next;
184                 free(tmp);
185         }
186 }
187
188 static int new_vendor(const char *name, u_int16_t vendorid)
189 {
190         struct vendor *v;
191         unsigned int h = hashnum(vendorid);
192
193         v = vendors[h];
194         for (; v; v = v->next)
195                 if (v->vendorid == vendorid)
196                         return -1;
197         v = my_malloc(sizeof(struct vendor) + strlen(name));
198         if (!v)
199                 return -1;
200         strcpy(v->name, name);
201         v->vendorid = vendorid;
202         v->next = vendors[h];
203         vendors[h] = v;
204         return 0;
205 }
206
207 static int new_product(const char *name, u_int16_t vendorid,
208                        u_int16_t productid)
209 {
210         struct product *p;
211         unsigned int h = hashnum((vendorid << 16) | productid);
212
213         p = products[h];
214         for (; p; p = p->next)
215                 if (p->vendorid == vendorid && p->productid == productid)
216                         return -1;
217         p = my_malloc(sizeof(struct product) + strlen(name));
218         if (!p)
219                 return -1;
220         strcpy(p->name, name);
221         p->vendorid = vendorid;
222         p->productid = productid;
223         p->next = products[h];
224         products[h] = p;
225         return 0;
226 }
227
228 static int new_class(const char *name, u_int8_t classid)
229 {
230         struct class *c;
231         unsigned int h = hashnum(classid);
232
233         c = classes[h];
234         for (; c; c = c->next)
235                 if (c->classid == classid)
236                         return -1;
237         c = my_malloc(sizeof(struct class) + strlen(name));
238         if (!c)
239                 return -1;
240         strcpy(c->name, name);
241         c->classid = classid;
242         c->next = classes[h];
243         classes[h] = c;
244         return 0;
245 }
246
247 static int new_subclass(const char *name, u_int8_t classid, u_int8_t subclassid)
248 {
249         struct subclass *s;
250         unsigned int h = hashnum((classid << 8) | subclassid);
251
252         s = subclasses[h];
253         for (; s; s = s->next)
254                 if (s->classid == classid && s->subclassid == subclassid)
255                         return -1;
256         s = my_malloc(sizeof(struct subclass) + strlen(name));
257         if (!s)
258                 return -1;
259         strcpy(s->name, name);
260         s->classid = classid;
261         s->subclassid = subclassid;
262         s->next = subclasses[h];
263         subclasses[h] = s;
264         return 0;
265 }
266
267 static int new_protocol(const char *name, u_int8_t classid, u_int8_t subclassid,
268                         u_int8_t protocolid)
269 {
270         struct protocol *p;
271         unsigned int h = hashnum((classid << 16) | (subclassid << 8)
272                                  | protocolid);
273
274         p = protocols[h];
275         for (; p; p = p->next)
276                 if (p->classid == classid && p->subclassid == subclassid
277                     && p->protocolid == protocolid)
278                         return -1;
279         p = my_malloc(sizeof(struct protocol) + strlen(name));
280         if (!p)
281                 return -1;
282         strcpy(p->name, name);
283         p->classid = classid;
284         p->subclassid = subclassid;
285         p->protocolid = protocolid;
286         p->next = protocols[h];
287         protocols[h] = p;
288         return 0;
289 }
290
291 static void parse(FILE *f)
292 {
293         char buf[512], *cp;
294         unsigned int linectr = 0;
295         int lastvendor = -1;
296         int lastclass = -1;
297         int lastsubclass = -1;
298         int lasthut = -1;
299         int lastlang = -1;
300         unsigned int u;
301
302         while (fgets(buf, sizeof(buf), f)) {
303                 linectr++;
304                 /* remove line ends */
305                 cp = strchr(buf, '\r');
306                 if (cp)
307                         *cp = 0;
308                 cp = strchr(buf, '\n');
309                 if (cp)
310                         *cp = 0;
311                 if (buf[0] == '#' || !buf[0])
312                         continue;
313                 cp = buf;
314                 if (buf[0] == 'P' && buf[1] == 'H' && buf[2] == 'Y' &&
315                     buf[3] == 'S' && buf[4] == 'D' &&
316                     buf[5] == 'E' && buf[6] == 'S' && /*isspace(buf[7])*/
317                     buf[7] == ' ') {
318                         continue;
319                 }
320                 if (buf[0] == 'P' && buf[1] == 'H' &&
321                     buf[2] == 'Y' && /*isspace(buf[3])*/ buf[3] == ' ') {
322                         continue;
323                 }
324                 if (buf[0] == 'B' && buf[1] == 'I' && buf[2] == 'A' &&
325                     buf[3] == 'S' && /*isspace(buf[4])*/ buf[4] == ' ') {
326                         continue;
327                 }
328                 if (buf[0] == 'L' && /*isspace(buf[1])*/ buf[1] == ' ') {
329                         lasthut = lastclass = lastvendor = lastsubclass = -1;
330                         /*
331                          * set 1 as pseudo-id to indicate that the parser is
332                          * in a `L' section.
333                          */
334                         lastlang = 1;
335                         continue;
336                 }
337                 if (buf[0] == 'C' && /*isspace(buf[1])*/ buf[1] == ' ') {
338                         /* class spec */
339                         cp = buf+2;
340                         while (isspace(*cp))
341                                 cp++;
342                         if (!isxdigit(*cp)) {
343                                 err("Invalid class spec at line %u", linectr);
344                                 continue;
345                         }
346                         u = strtoul(cp, &cp, 16);
347                         while (isspace(*cp))
348                                 cp++;
349                         if (!*cp) {
350                                 err("Invalid class spec at line %u", linectr);
351                                 continue;
352                         }
353                         if (new_class(cp, u))
354                                 err("Duplicate class spec at line %u class %04x %s",
355                                     linectr, u, cp);
356                         dbg("line %5u class %02x %s", linectr, u, cp);
357                         lasthut = lastlang = lastvendor = lastsubclass = -1;
358                         lastclass = u;
359                         continue;
360                 }
361                 if (buf[0] == 'A' && buf[1] == 'T' && isspace(buf[2])) {
362                         /* audio terminal type spec */
363                         continue;
364                 }
365                 if (buf[0] == 'H' && buf[1] == 'C' && buf[2] == 'C'
366                     && isspace(buf[3])) {
367                         /* HID Descriptor bCountryCode */
368                         continue;
369                 }
370                 if (isxdigit(*cp)) {
371                         /* vendor */
372                         u = strtoul(cp, &cp, 16);
373                         while (isspace(*cp))
374                                 cp++;
375                         if (!*cp) {
376                                 err("Invalid vendor spec at line %u", linectr);
377                                 continue;
378                         }
379                         if (new_vendor(cp, u))
380                                 err("Duplicate vendor spec at line %u vendor %04x %s",
381                                     linectr, u, cp);
382                         dbg("line %5u vendor %04x %s", linectr, u, cp);
383                         lastvendor = u;
384                         lasthut = lastlang = lastclass = lastsubclass = -1;
385                         continue;
386                 }
387                 if (buf[0] == '\t' && isxdigit(buf[1])) {
388                         /* product or subclass spec */
389                         u = strtoul(buf+1, &cp, 16);
390                         while (isspace(*cp))
391                                 cp++;
392                         if (!*cp) {
393                                 err("Invalid product/subclass spec at line %u",
394                                     linectr);
395                                 continue;
396                         }
397                         if (lastvendor != -1) {
398                                 if (new_product(cp, lastvendor, u))
399                                         err("Duplicate product spec at line %u product %04x:%04x %s",
400                                             linectr, lastvendor, u, cp);
401                                 dbg("line %5u product %04x:%04x %s", linectr,
402                                     lastvendor, u, cp);
403                                 continue;
404                         }
405                         if (lastclass != -1) {
406                                 if (new_subclass(cp, lastclass, u))
407                                         err("Duplicate subclass spec at line %u class %02x:%02x %s",
408                                             linectr, lastclass, u, cp);
409                                 dbg("line %5u subclass %02x:%02x %s", linectr,
410                                     lastclass, u, cp);
411                                 lastsubclass = u;
412                                 continue;
413                         }
414                         if (lasthut != -1) {
415                                 /* do not store hut */
416                                 continue;
417                         }
418                         if (lastlang != -1) {
419                                 /* do not store langid */
420                                 continue;
421                         }
422                         err("Product/Subclass spec without prior Vendor/Class spec at line %u",
423                             linectr);
424                         continue;
425                 }
426                 if (buf[0] == '\t' && buf[1] == '\t' && isxdigit(buf[2])) {
427                         /* protocol spec */
428                         u = strtoul(buf+2, &cp, 16);
429                         while (isspace(*cp))
430                                 cp++;
431                         if (!*cp) {
432                                 err("Invalid protocol spec at line %u",
433                                     linectr);
434                                 continue;
435                         }
436                         if (lastclass != -1 && lastsubclass != -1) {
437                                 if (new_protocol(cp, lastclass, lastsubclass,
438                                                  u))
439                                         err("Duplicate protocol spec at line %u class %02x:%02x:%02x %s",
440                                             linectr, lastclass, lastsubclass,
441                                             u, cp);
442                                 dbg("line %5u protocol %02x:%02x:%02x %s",
443                                     linectr, lastclass, lastsubclass, u, cp);
444                                 continue;
445                         }
446                         err("Protocol spec without prior Class and Subclass spec at line %u",
447                             linectr);
448                         continue;
449                 }
450                 if (buf[0] == 'H' && buf[1] == 'I' &&
451                     buf[2] == 'D' && /*isspace(buf[3])*/ buf[3] == ' ') {
452                         continue;
453                 }
454                 if (buf[0] == 'H' && buf[1] == 'U' &&
455                     buf[2] == 'T' && /*isspace(buf[3])*/ buf[3] == ' ') {
456                         lastlang = lastclass = lastvendor = lastsubclass = -1;
457                         /*
458                          * set 1 as pseudo-id to indicate that the parser is
459                          * in a `HUT' section.
460                          */
461                         lasthut = 1;
462                         continue;
463                 }
464                 if (buf[0] == 'R' && buf[1] == ' ')
465                         continue;
466
467                 if (buf[0] == 'V' && buf[1] == 'T')
468                         continue;
469
470                 err("Unknown line at line %u", linectr);
471         }
472 }
473
474
475 int names_init(char *n)
476 {
477         FILE *f;
478
479         f = fopen(n, "r");
480         if (!f)
481                 return errno;
482
483         parse(f);
484         fclose(f);
485         return 0;
486 }