1 /* $Id: capiutil.c,v 1.13.6.4 2001/09/23 22:24:33 kai Exp $
2 *
3 * CAPI 2.0 convert capi message to capi message struct
4 *
5 * From CAPI 2.0 Development Kit AVM 1995 (msg.c)
6 * Rewritten for Linux 1996 by Carsten Paeth <calle@calle.de>
7 *
8 * This software may be used and distributed according to the terms
9 * of the GNU General Public License, incorporated herein by reference.
10 *
11 */
12
13 #include <linux/module.h>
14 #include <linux/string.h>
15 #include <linux/ctype.h>
16 #include <linux/stddef.h>
17 #include <linux/kernel.h>
18 #include <linux/mm.h>
19 #include <linux/init.h>
20 #include <linux/isdn/capiutil.h>
21 #include <linux/slab.h>
22
23 #include "kcapi.h"
24
25 /* from CAPI2.0 DDK AVM Berlin GmbH */
26
27 typedef struct {
28 int typ;
29 size_t off;
30 } _cdef;
31
32 #define _CBYTE 1
33 #define _CWORD 2
34 #define _CDWORD 3
35 #define _CSTRUCT 4
36 #define _CMSTRUCT 5
37 #define _CEND 6
38
39 static _cdef cdef[] =
40 {
41 /*00 */
42 {_CEND},
43 /*01 */
44 {_CEND},
45 /*02 */
46 {_CEND},
47 /*03 */
48 {_CDWORD, offsetof(_cmsg, adr.adrController)},
49 /*04 */
50 {_CMSTRUCT, offsetof(_cmsg, AdditionalInfo)},
51 /*05 */
52 {_CSTRUCT, offsetof(_cmsg, B1configuration)},
53 /*06 */
54 {_CWORD, offsetof(_cmsg, B1protocol)},
55 /*07 */
56 {_CSTRUCT, offsetof(_cmsg, B2configuration)},
57 /*08 */
58 {_CWORD, offsetof(_cmsg, B2protocol)},
59 /*09 */
60 {_CSTRUCT, offsetof(_cmsg, B3configuration)},
61 /*0a */
62 {_CWORD, offsetof(_cmsg, B3protocol)},
63 /*0b */
64 {_CSTRUCT, offsetof(_cmsg, BC)},
65 /*0c */
66 {_CSTRUCT, offsetof(_cmsg, BChannelinformation)},
67 /*0d */
68 {_CMSTRUCT, offsetof(_cmsg, BProtocol)},
69 /*0e */
70 {_CSTRUCT, offsetof(_cmsg, CalledPartyNumber)},
71 /*0f */
72 {_CSTRUCT, offsetof(_cmsg, CalledPartySubaddress)},
73 /*10 */
74 {_CSTRUCT, offsetof(_cmsg, CallingPartyNumber)},
75 /*11 */
76 {_CSTRUCT, offsetof(_cmsg, CallingPartySubaddress)},
77 /*12 */
78 {_CDWORD, offsetof(_cmsg, CIPmask)},
79 /*13 */
80 {_CDWORD, offsetof(_cmsg, CIPmask2)},
81 /*14 */
82 {_CWORD, offsetof(_cmsg, CIPValue)},
83 /*15 */
84 {_CDWORD, offsetof(_cmsg, Class)},
85 /*16 */
86 {_CSTRUCT, offsetof(_cmsg, ConnectedNumber)},
87 /*17 */
88 {_CSTRUCT, offsetof(_cmsg, ConnectedSubaddress)},
89 /*18 */
90 {_CDWORD, offsetof(_cmsg, Data)},
91 /*19 */
92 {_CWORD, offsetof(_cmsg, DataHandle)},
93 /*1a */
94 {_CWORD, offsetof(_cmsg, DataLength)},
95 /*1b */
96 {_CSTRUCT, offsetof(_cmsg, FacilityConfirmationParameter)},
97 /*1c */
98 {_CSTRUCT, offsetof(_cmsg, Facilitydataarray)},
99 /*1d */
100 {_CSTRUCT, offsetof(_cmsg, FacilityIndicationParameter)},
101 /*1e */
102 {_CSTRUCT, offsetof(_cmsg, FacilityRequestParameter)},
103 /*1f */
104 {_CWORD, offsetof(_cmsg, FacilitySelector)},
105 /*20 */
106 {_CWORD, offsetof(_cmsg, Flags)},
107 /*21 */
108 {_CDWORD, offsetof(_cmsg, Function)},
109 /*22 */
110 {_CSTRUCT, offsetof(_cmsg, HLC)},
111 /*23 */
112 {_CWORD, offsetof(_cmsg, Info)},
113 /*24 */
114 {_CSTRUCT, offsetof(_cmsg, InfoElement)},
115 /*25 */
116 {_CDWORD, offsetof(_cmsg, InfoMask)},
117 /*26 */
118 {_CWORD, offsetof(_cmsg, InfoNumber)},
119 /*27 */
120 {_CSTRUCT, offsetof(_cmsg, Keypadfacility)},
121 /*28 */
122 {_CSTRUCT, offsetof(_cmsg, LLC)},
123 /*29 */
124 {_CSTRUCT, offsetof(_cmsg, ManuData)},
125 /*2a */
126 {_CDWORD, offsetof(_cmsg, ManuID)},
127 /*2b */
128 {_CSTRUCT, offsetof(_cmsg, NCPI)},
129 /*2c */
130 {_CWORD, offsetof(_cmsg, Reason)},
131 /*2d */
132 {_CWORD, offsetof(_cmsg, Reason_B3)},
133 /*2e */
134 {_CWORD, offsetof(_cmsg, Reject)},
135 /*2f */
136 {_CSTRUCT, offsetof(_cmsg, Useruserdata)}
137 };
138
139 static unsigned char *cpars[] =
140 {
141 /* ALERT_REQ */ [0x01] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
142 /* CONNECT_REQ */ [0x02] = "\x03\x14\x0e\x10\x0f\x11\x0d\x06\x08\x0a\x05\x07\x09\x01\x0b\x28\x22\x04\x0c\x27\x2f\x1c\x01\x01",
143 /* DISCONNECT_REQ */ [0x04] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
144 /* LISTEN_REQ */ [0x05] = "\x03\x25\x12\x13\x10\x11\x01",
145 /* INFO_REQ */ [0x08] = "\x03\x0e\x04\x0c\x27\x2f\x1c\x01\x01",
146 /* FACILITY_REQ */ [0x09] = "\x03\x1f\x1e\x01",
147 /* SELECT_B_PROTOCOL_REQ */ [0x0a] = "\x03\x0d\x06\x08\x0a\x05\x07\x09\x01\x01",
148 /* CONNECT_B3_REQ */ [0x0b] = "\x03\x2b\x01",
149 /* DISCONNECT_B3_REQ */ [0x0d] = "\x03\x2b\x01",
150 /* DATA_B3_REQ */ [0x0f] = "\x03\x18\x1a\x19\x20\x01",
151 /* RESET_B3_REQ */ [0x10] = "\x03\x2b\x01",
152 /* ALERT_CONF */ [0x13] = "\x03\x23\x01",
153 /* CONNECT_CONF */ [0x14] = "\x03\x23\x01",
154 /* DISCONNECT_CONF */ [0x16] = "\x03\x23\x01",
155 /* LISTEN_CONF */ [0x17] = "\x03\x23\x01",
156 /* MANUFACTURER_REQ */ [0x18] = "\x03\x2a\x15\x21\x29\x01",
157 /* INFO_CONF */ [0x1a] = "\x03\x23\x01",
158 /* FACILITY_CONF */ [0x1b] = "\x03\x23\x1f\x1b\x01",
159 /* SELECT_B_PROTOCOL_CONF */ [0x1c] = "\x03\x23\x01",
160 /* CONNECT_B3_CONF */ [0x1d] = "\x03\x23\x01",
161 /* DISCONNECT_B3_CONF */ [0x1f] = "\x03\x23\x01",
162 /* DATA_B3_CONF */ [0x21] = "\x03\x19\x23\x01",
163 /* RESET_B3_CONF */ [0x22] = "\x03\x23\x01",
164 /* CONNECT_IND */ [0x26] = "\x03\x14\x0e\x10\x0f\x11\x0b\x28\x22\x04\x0c\x27\x2f\x1c\x01\x01",
165 /* CONNECT_ACTIVE_IND */ [0x27] = "\x03\x16\x17\x28\x01",
166 /* DISCONNECT_IND */ [0x28] = "\x03\x2c\x01",
167 /* MANUFACTURER_CONF */ [0x2a] = "\x03\x2a\x15\x21\x29\x01",
168 /* INFO_IND */ [0x2c] = "\x03\x26\x24\x01",
169 /* FACILITY_IND */ [0x2d] = "\x03\x1f\x1d\x01",
170 /* CONNECT_B3_IND */ [0x2f] = "\x03\x2b\x01",
171 /* CONNECT_B3_ACTIVE_IND */ [0x30] = "\x03\x2b\x01",
172 /* DISCONNECT_B3_IND */ [0x31] = "\x03\x2d\x2b\x01",
173 /* DATA_B3_IND */ [0x33] = "\x03\x18\x1a\x19\x20\x01",
174 /* RESET_B3_IND */ [0x34] = "\x03\x2b\x01",
175 /* CONNECT_B3_T90_ACTIVE_IND */ [0x35] = "\x03\x2b\x01",
176 /* CONNECT_RESP */ [0x38] = "\x03\x2e\x0d\x06\x08\x0a\x05\x07\x09\x01\x16\x17\x28\x04\x0c\x27\x2f\x1c\x01\x01",
177 /* CONNECT_ACTIVE_RESP */ [0x39] = "\x03\x01",
178 /* DISCONNECT_RESP */ [0x3a] = "\x03\x01",
179 /* MANUFACTURER_IND */ [0x3c] = "\x03\x2a\x15\x21\x29\x01",
180 /* INFO_RESP */ [0x3e] = "\x03\x01",
181 /* FACILITY_RESP */ [0x3f] = "\x03\x1f\x01",
182 /* CONNECT_B3_RESP */ [0x41] = "\x03\x2e\x2b\x01",
183 /* CONNECT_B3_ACTIVE_RESP */ [0x42] = "\x03\x01",
184 /* DISCONNECT_B3_RESP */ [0x43] = "\x03\x01",
185 /* DATA_B3_RESP */ [0x45] = "\x03\x19\x01",
186 /* RESET_B3_RESP */ [0x46] = "\x03\x01",
187 /* CONNECT_B3_T90_ACTIVE_RESP */ [0x47] = "\x03\x01",
188 /* MANUFACTURER_RESP */ [0x4e] = "\x03\x2a\x15\x21\x29\x01",
189 };
190
191 /*-------------------------------------------------------*/
192
193 #define byteTLcpy(x, y) *(u8 *)(x) = *(u8 *)(y);
194 #define wordTLcpy(x, y) *(u16 *)(x) = *(u16 *)(y);
195 #define dwordTLcpy(x, y) memcpy(x, y, 4);
196 #define structTLcpy(x, y, l) memcpy(x, y, l)
197 #define structTLcpyovl(x, y, l) memmove(x, y, l)
198
199 #define byteTRcpy(x, y) *(u8 *)(y) = *(u8 *)(x);
200 #define wordTRcpy(x, y) *(u16 *)(y) = *(u16 *)(x);
201 #define dwordTRcpy(x, y) memcpy(y, x, 4);
202 #define structTRcpy(x, y, l) memcpy(y, x, l)
203 #define structTRcpyovl(x, y, l) memmove(y, x, l)
204
205 /*-------------------------------------------------------*/
command_2_index(u8 c,u8 sc)206 static unsigned command_2_index(u8 c, u8 sc)
207 {
208 if (c & 0x80)
209 c = 0x9 + (c & 0x0f);
210 else if (c == 0x41)
211 c = 0x9 + 0x1;
212 if (c > 0x18)
213 c = 0x00;
214 return (sc & 3) * (0x9 + 0x9) + c;
215 }
216
217 /**
218 * capi_cmd2par() - find parameter string for CAPI 2.0 command/subcommand
219 * @cmd: command number
220 * @subcmd: subcommand number
221 *
222 * Return value: static string, NULL if command/subcommand unknown
223 */
224
capi_cmd2par(u8 cmd,u8 subcmd)225 static unsigned char *capi_cmd2par(u8 cmd, u8 subcmd)
226 {
227 return cpars[command_2_index(cmd, subcmd)];
228 }
229
230 /*-------------------------------------------------------*/
231 #define TYP (cdef[cmsg->par[cmsg->p]].typ)
232 #define OFF (((u8 *)cmsg) + cdef[cmsg->par[cmsg->p]].off)
233
jumpcstruct(_cmsg * cmsg)234 static void jumpcstruct(_cmsg *cmsg)
235 {
236 unsigned layer;
237 for (cmsg->p++, layer = 1; layer;) {
238 /* $$$$$ assert (cmsg->p); */
239 cmsg->p++;
240 switch (TYP) {
241 case _CMSTRUCT:
242 layer++;
243 break;
244 case _CEND:
245 layer--;
246 break;
247 }
248 }
249 }
250
251 /*-------------------------------------------------------*/
252
253 static char *mnames[] =
254 {
255 [0x01] = "ALERT_REQ",
256 [0x02] = "CONNECT_REQ",
257 [0x04] = "DISCONNECT_REQ",
258 [0x05] = "LISTEN_REQ",
259 [0x08] = "INFO_REQ",
260 [0x09] = "FACILITY_REQ",
261 [0x0a] = "SELECT_B_PROTOCOL_REQ",
262 [0x0b] = "CONNECT_B3_REQ",
263 [0x0d] = "DISCONNECT_B3_REQ",
264 [0x0f] = "DATA_B3_REQ",
265 [0x10] = "RESET_B3_REQ",
266 [0x13] = "ALERT_CONF",
267 [0x14] = "CONNECT_CONF",
268 [0x16] = "DISCONNECT_CONF",
269 [0x17] = "LISTEN_CONF",
270 [0x18] = "MANUFACTURER_REQ",
271 [0x1a] = "INFO_CONF",
272 [0x1b] = "FACILITY_CONF",
273 [0x1c] = "SELECT_B_PROTOCOL_CONF",
274 [0x1d] = "CONNECT_B3_CONF",
275 [0x1f] = "DISCONNECT_B3_CONF",
276 [0x21] = "DATA_B3_CONF",
277 [0x22] = "RESET_B3_CONF",
278 [0x26] = "CONNECT_IND",
279 [0x27] = "CONNECT_ACTIVE_IND",
280 [0x28] = "DISCONNECT_IND",
281 [0x2a] = "MANUFACTURER_CONF",
282 [0x2c] = "INFO_IND",
283 [0x2d] = "FACILITY_IND",
284 [0x2f] = "CONNECT_B3_IND",
285 [0x30] = "CONNECT_B3_ACTIVE_IND",
286 [0x31] = "DISCONNECT_B3_IND",
287 [0x33] = "DATA_B3_IND",
288 [0x34] = "RESET_B3_IND",
289 [0x35] = "CONNECT_B3_T90_ACTIVE_IND",
290 [0x38] = "CONNECT_RESP",
291 [0x39] = "CONNECT_ACTIVE_RESP",
292 [0x3a] = "DISCONNECT_RESP",
293 [0x3c] = "MANUFACTURER_IND",
294 [0x3e] = "INFO_RESP",
295 [0x3f] = "FACILITY_RESP",
296 [0x41] = "CONNECT_B3_RESP",
297 [0x42] = "CONNECT_B3_ACTIVE_RESP",
298 [0x43] = "DISCONNECT_B3_RESP",
299 [0x45] = "DATA_B3_RESP",
300 [0x46] = "RESET_B3_RESP",
301 [0x47] = "CONNECT_B3_T90_ACTIVE_RESP",
302 [0x4e] = "MANUFACTURER_RESP"
303 };
304
305 /**
306 * capi_cmd2str() - convert CAPI 2.0 command/subcommand number to name
307 * @cmd: command number
308 * @subcmd: subcommand number
309 *
310 * Return value: static string
311 */
312
capi_cmd2str(u8 cmd,u8 subcmd)313 char *capi_cmd2str(u8 cmd, u8 subcmd)
314 {
315 char *result;
316
317 result = mnames[command_2_index(cmd, subcmd)];
318 if (result == NULL)
319 result = "INVALID_COMMAND";
320 return result;
321 }
322
323
324 /*-------------------------------------------------------*/
325
326 #ifdef CONFIG_CAPI_TRACE
327
328 /*-------------------------------------------------------*/
329
330 static char *pnames[] =
331 {
332 /*00 */ NULL,
333 /*01 */ NULL,
334 /*02 */ NULL,
335 /*03 */ "Controller/PLCI/NCCI",
336 /*04 */ "AdditionalInfo",
337 /*05 */ "B1configuration",
338 /*06 */ "B1protocol",
339 /*07 */ "B2configuration",
340 /*08 */ "B2protocol",
341 /*09 */ "B3configuration",
342 /*0a */ "B3protocol",
343 /*0b */ "BC",
344 /*0c */ "BChannelinformation",
345 /*0d */ "BProtocol",
346 /*0e */ "CalledPartyNumber",
347 /*0f */ "CalledPartySubaddress",
348 /*10 */ "CallingPartyNumber",
349 /*11 */ "CallingPartySubaddress",
350 /*12 */ "CIPmask",
351 /*13 */ "CIPmask2",
352 /*14 */ "CIPValue",
353 /*15 */ "Class",
354 /*16 */ "ConnectedNumber",
355 /*17 */ "ConnectedSubaddress",
356 /*18 */ "Data32",
357 /*19 */ "DataHandle",
358 /*1a */ "DataLength",
359 /*1b */ "FacilityConfirmationParameter",
360 /*1c */ "Facilitydataarray",
361 /*1d */ "FacilityIndicationParameter",
362 /*1e */ "FacilityRequestParameter",
363 /*1f */ "FacilitySelector",
364 /*20 */ "Flags",
365 /*21 */ "Function",
366 /*22 */ "HLC",
367 /*23 */ "Info",
368 /*24 */ "InfoElement",
369 /*25 */ "InfoMask",
370 /*26 */ "InfoNumber",
371 /*27 */ "Keypadfacility",
372 /*28 */ "LLC",
373 /*29 */ "ManuData",
374 /*2a */ "ManuID",
375 /*2b */ "NCPI",
376 /*2c */ "Reason",
377 /*2d */ "Reason_B3",
378 /*2e */ "Reject",
379 /*2f */ "Useruserdata"
380 };
381
382 #include <linux/stdarg.h>
383
384 /*-------------------------------------------------------*/
bufprint(_cdebbuf * cdb,char * fmt,...)385 static _cdebbuf *bufprint(_cdebbuf *cdb, char *fmt, ...)
386 {
387 va_list f;
388 size_t n, r;
389
390 if (!cdb)
391 return NULL;
392 va_start(f, fmt);
393 r = cdb->size - cdb->pos;
394 n = vsnprintf(cdb->p, r, fmt, f);
395 va_end(f);
396 if (n >= r) {
397 /* truncated, need bigger buffer */
398 size_t ns = 2 * cdb->size;
399 u_char *nb;
400
401 while ((ns - cdb->pos) <= n)
402 ns *= 2;
403 nb = kmalloc(ns, GFP_ATOMIC);
404 if (!nb) {
405 cdebbuf_free(cdb);
406 return NULL;
407 }
408 memcpy(nb, cdb->buf, cdb->pos);
409 kfree(cdb->buf);
410 nb[cdb->pos] = 0;
411 cdb->buf = nb;
412 cdb->p = cdb->buf + cdb->pos;
413 cdb->size = ns;
414 va_start(f, fmt);
415 r = cdb->size - cdb->pos;
416 n = vsnprintf(cdb->p, r, fmt, f);
417 va_end(f);
418 }
419 cdb->p += n;
420 cdb->pos += n;
421 return cdb;
422 }
423
printstructlen(_cdebbuf * cdb,u8 * m,unsigned len)424 static _cdebbuf *printstructlen(_cdebbuf *cdb, u8 *m, unsigned len)
425 {
426 unsigned hex = 0;
427
428 if (!cdb)
429 return NULL;
430 for (; len; len--, m++)
431 if (isalnum(*m) || *m == ' ') {
432 if (hex)
433 cdb = bufprint(cdb, ">");
434 cdb = bufprint(cdb, "%c", *m);
435 hex = 0;
436 } else {
437 if (!hex)
438 cdb = bufprint(cdb, "<%02x", *m);
439 else
440 cdb = bufprint(cdb, " %02x", *m);
441 hex = 1;
442 }
443 if (hex)
444 cdb = bufprint(cdb, ">");
445 return cdb;
446 }
447
printstruct(_cdebbuf * cdb,u8 * m)448 static _cdebbuf *printstruct(_cdebbuf *cdb, u8 *m)
449 {
450 unsigned len;
451
452 if (m[0] != 0xff) {
453 len = m[0];
454 m += 1;
455 } else {
456 len = ((u16 *) (m + 1))[0];
457 m += 3;
458 }
459 cdb = printstructlen(cdb, m, len);
460 return cdb;
461 }
462
463 /*-------------------------------------------------------*/
464 #define NAME (pnames[cmsg->par[cmsg->p]])
465
protocol_message_2_pars(_cdebbuf * cdb,_cmsg * cmsg,int level)466 static _cdebbuf *protocol_message_2_pars(_cdebbuf *cdb, _cmsg *cmsg, int level)
467 {
468 if (!cmsg->par)
469 return NULL; /* invalid command/subcommand */
470
471 for (; TYP != _CEND; cmsg->p++) {
472 int slen = 29 + 3 - level;
473 int i;
474
475 if (!cdb)
476 return NULL;
477 cdb = bufprint(cdb, " ");
478 for (i = 0; i < level - 1; i++)
479 cdb = bufprint(cdb, " ");
480
481 switch (TYP) {
482 case _CBYTE:
483 cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u8 *) (cmsg->m + cmsg->l));
484 cmsg->l++;
485 break;
486 case _CWORD:
487 cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u16 *) (cmsg->m + cmsg->l));
488 cmsg->l += 2;
489 break;
490 case _CDWORD:
491 cdb = bufprint(cdb, "%-*s = 0x%lx\n", slen, NAME, *(u32 *) (cmsg->m + cmsg->l));
492 cmsg->l += 4;
493 break;
494 case _CSTRUCT:
495 cdb = bufprint(cdb, "%-*s = ", slen, NAME);
496 if (cmsg->m[cmsg->l] == '\0')
497 cdb = bufprint(cdb, "default");
498 else
499 cdb = printstruct(cdb, cmsg->m + cmsg->l);
500 cdb = bufprint(cdb, "\n");
501 if (cmsg->m[cmsg->l] != 0xff)
502 cmsg->l += 1 + cmsg->m[cmsg->l];
503 else
504 cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
505
506 break;
507
508 case _CMSTRUCT:
509 /*----- Metastruktur 0 -----*/
510 if (cmsg->m[cmsg->l] == '\0') {
511 cdb = bufprint(cdb, "%-*s = default\n", slen, NAME);
512 cmsg->l++;
513 jumpcstruct(cmsg);
514 } else {
515 char *name = NAME;
516 unsigned _l = cmsg->l;
517 cdb = bufprint(cdb, "%-*s\n", slen, name);
518 cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
519 cmsg->p++;
520 cdb = protocol_message_2_pars(cdb, cmsg, level + 1);
521 }
522 break;
523 }
524 }
525 return cdb;
526 }
527 /*-------------------------------------------------------*/
528
529 static _cdebbuf *g_debbuf;
530 static u_long g_debbuf_lock;
531 static _cmsg *g_cmsg;
532
cdebbuf_alloc(void)533 static _cdebbuf *cdebbuf_alloc(void)
534 {
535 _cdebbuf *cdb;
536
537 if (likely(!test_and_set_bit(1, &g_debbuf_lock))) {
538 cdb = g_debbuf;
539 goto init;
540 } else
541 cdb = kmalloc(sizeof(_cdebbuf), GFP_ATOMIC);
542 if (!cdb)
543 return NULL;
544 cdb->buf = kmalloc(CDEBUG_SIZE, GFP_ATOMIC);
545 if (!cdb->buf) {
546 kfree(cdb);
547 return NULL;
548 }
549 cdb->size = CDEBUG_SIZE;
550 init:
551 cdb->buf[0] = 0;
552 cdb->p = cdb->buf;
553 cdb->pos = 0;
554 return cdb;
555 }
556
557 /**
558 * cdebbuf_free() - free CAPI debug buffer
559 * @cdb: buffer to free
560 */
561
cdebbuf_free(_cdebbuf * cdb)562 void cdebbuf_free(_cdebbuf *cdb)
563 {
564 if (likely(cdb == g_debbuf)) {
565 test_and_clear_bit(1, &g_debbuf_lock);
566 return;
567 }
568 if (likely(cdb))
569 kfree(cdb->buf);
570 kfree(cdb);
571 }
572
573
574 /**
575 * capi_message2str() - format CAPI 2.0 message for printing
576 * @msg: CAPI 2.0 message
577 *
578 * Allocates a CAPI debug buffer and fills it with a printable representation
579 * of the CAPI 2.0 message in @msg.
580 * Return value: allocated debug buffer, NULL on error
581 * The returned buffer should be freed by a call to cdebbuf_free() after use.
582 */
583
capi_message2str(u8 * msg)584 _cdebbuf *capi_message2str(u8 *msg)
585 {
586 _cdebbuf *cdb;
587 _cmsg *cmsg;
588
589 cdb = cdebbuf_alloc();
590 if (unlikely(!cdb))
591 return NULL;
592 if (likely(cdb == g_debbuf))
593 cmsg = g_cmsg;
594 else
595 cmsg = kmalloc(sizeof(_cmsg), GFP_ATOMIC);
596 if (unlikely(!cmsg)) {
597 cdebbuf_free(cdb);
598 return NULL;
599 }
600 cmsg->m = msg;
601 cmsg->l = 8;
602 cmsg->p = 0;
603 byteTRcpy(cmsg->m + 4, &cmsg->Command);
604 byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
605 cmsg->par = capi_cmd2par(cmsg->Command, cmsg->Subcommand);
606
607 cdb = bufprint(cdb, "%-26s ID=%03d #0x%04x LEN=%04d\n",
608 capi_cmd2str(cmsg->Command, cmsg->Subcommand),
609 ((unsigned short *) msg)[1],
610 ((unsigned short *) msg)[3],
611 ((unsigned short *) msg)[0]);
612
613 cdb = protocol_message_2_pars(cdb, cmsg, 1);
614 if (unlikely(cmsg != g_cmsg))
615 kfree(cmsg);
616 return cdb;
617 }
618
cdebug_init(void)619 int __init cdebug_init(void)
620 {
621 g_cmsg = kmalloc(sizeof(_cmsg), GFP_KERNEL);
622 if (!g_cmsg)
623 return -ENOMEM;
624 g_debbuf = kmalloc(sizeof(_cdebbuf), GFP_KERNEL);
625 if (!g_debbuf) {
626 kfree(g_cmsg);
627 return -ENOMEM;
628 }
629 g_debbuf->buf = kmalloc(CDEBUG_GSIZE, GFP_KERNEL);
630 if (!g_debbuf->buf) {
631 kfree(g_cmsg);
632 kfree(g_debbuf);
633 return -ENOMEM;
634 }
635 g_debbuf->size = CDEBUG_GSIZE;
636 g_debbuf->buf[0] = 0;
637 g_debbuf->p = g_debbuf->buf;
638 g_debbuf->pos = 0;
639 return 0;
640 }
641
cdebug_exit(void)642 void cdebug_exit(void)
643 {
644 if (g_debbuf)
645 kfree(g_debbuf->buf);
646 kfree(g_debbuf);
647 kfree(g_cmsg);
648 }
649
650 #else /* !CONFIG_CAPI_TRACE */
651
652 static _cdebbuf g_debbuf = {"CONFIG_CAPI_TRACE not enabled", NULL, 0, 0};
653
capi_message2str(u8 * msg)654 _cdebbuf *capi_message2str(u8 *msg)
655 {
656 return &g_debbuf;
657 }
658
capi_cmsg2str(_cmsg * cmsg)659 _cdebbuf *capi_cmsg2str(_cmsg *cmsg)
660 {
661 return &g_debbuf;
662 }
663
cdebbuf_free(_cdebbuf * cdb)664 void cdebbuf_free(_cdebbuf *cdb)
665 {
666 }
667
cdebug_init(void)668 int __init cdebug_init(void)
669 {
670 return 0;
671 }
672
cdebug_exit(void)673 void cdebug_exit(void)
674 {
675 }
676
677 #endif
678