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 /* from CAPI2.0 DDK AVM Berlin GmbH */
24
25 typedef struct {
26 int typ;
27 size_t off;
28 } _cdef;
29
30 #define _CBYTE 1
31 #define _CWORD 2
32 #define _CDWORD 3
33 #define _CSTRUCT 4
34 #define _CMSTRUCT 5
35 #define _CEND 6
36
37 static _cdef cdef[] =
38 {
39 /*00 */
40 {_CEND},
41 /*01 */
42 {_CEND},
43 /*02 */
44 {_CEND},
45 /*03 */
46 {_CDWORD, offsetof(_cmsg, adr.adrController)},
47 /*04 */
48 {_CMSTRUCT, offsetof(_cmsg, AdditionalInfo)},
49 /*05 */
50 {_CSTRUCT, offsetof(_cmsg, B1configuration)},
51 /*06 */
52 {_CWORD, offsetof(_cmsg, B1protocol)},
53 /*07 */
54 {_CSTRUCT, offsetof(_cmsg, B2configuration)},
55 /*08 */
56 {_CWORD, offsetof(_cmsg, B2protocol)},
57 /*09 */
58 {_CSTRUCT, offsetof(_cmsg, B3configuration)},
59 /*0a */
60 {_CWORD, offsetof(_cmsg, B3protocol)},
61 /*0b */
62 {_CSTRUCT, offsetof(_cmsg, BC)},
63 /*0c */
64 {_CSTRUCT, offsetof(_cmsg, BChannelinformation)},
65 /*0d */
66 {_CMSTRUCT, offsetof(_cmsg, BProtocol)},
67 /*0e */
68 {_CSTRUCT, offsetof(_cmsg, CalledPartyNumber)},
69 /*0f */
70 {_CSTRUCT, offsetof(_cmsg, CalledPartySubaddress)},
71 /*10 */
72 {_CSTRUCT, offsetof(_cmsg, CallingPartyNumber)},
73 /*11 */
74 {_CSTRUCT, offsetof(_cmsg, CallingPartySubaddress)},
75 /*12 */
76 {_CDWORD, offsetof(_cmsg, CIPmask)},
77 /*13 */
78 {_CDWORD, offsetof(_cmsg, CIPmask2)},
79 /*14 */
80 {_CWORD, offsetof(_cmsg, CIPValue)},
81 /*15 */
82 {_CDWORD, offsetof(_cmsg, Class)},
83 /*16 */
84 {_CSTRUCT, offsetof(_cmsg, ConnectedNumber)},
85 /*17 */
86 {_CSTRUCT, offsetof(_cmsg, ConnectedSubaddress)},
87 /*18 */
88 {_CDWORD, offsetof(_cmsg, Data)},
89 /*19 */
90 {_CWORD, offsetof(_cmsg, DataHandle)},
91 /*1a */
92 {_CWORD, offsetof(_cmsg, DataLength)},
93 /*1b */
94 {_CSTRUCT, offsetof(_cmsg, FacilityConfirmationParameter)},
95 /*1c */
96 {_CSTRUCT, offsetof(_cmsg, Facilitydataarray)},
97 /*1d */
98 {_CSTRUCT, offsetof(_cmsg, FacilityIndicationParameter)},
99 /*1e */
100 {_CSTRUCT, offsetof(_cmsg, FacilityRequestParameter)},
101 /*1f */
102 {_CWORD, offsetof(_cmsg, FacilitySelector)},
103 /*20 */
104 {_CWORD, offsetof(_cmsg, Flags)},
105 /*21 */
106 {_CDWORD, offsetof(_cmsg, Function)},
107 /*22 */
108 {_CSTRUCT, offsetof(_cmsg, HLC)},
109 /*23 */
110 {_CWORD, offsetof(_cmsg, Info)},
111 /*24 */
112 {_CSTRUCT, offsetof(_cmsg, InfoElement)},
113 /*25 */
114 {_CDWORD, offsetof(_cmsg, InfoMask)},
115 /*26 */
116 {_CWORD, offsetof(_cmsg, InfoNumber)},
117 /*27 */
118 {_CSTRUCT, offsetof(_cmsg, Keypadfacility)},
119 /*28 */
120 {_CSTRUCT, offsetof(_cmsg, LLC)},
121 /*29 */
122 {_CSTRUCT, offsetof(_cmsg, ManuData)},
123 /*2a */
124 {_CDWORD, offsetof(_cmsg, ManuID)},
125 /*2b */
126 {_CSTRUCT, offsetof(_cmsg, NCPI)},
127 /*2c */
128 {_CWORD, offsetof(_cmsg, Reason)},
129 /*2d */
130 {_CWORD, offsetof(_cmsg, Reason_B3)},
131 /*2e */
132 {_CWORD, offsetof(_cmsg, Reject)},
133 /*2f */
134 {_CSTRUCT, offsetof(_cmsg, Useruserdata)}
135 };
136
137 static unsigned char *cpars[] =
138 {
139 /* ALERT_REQ */ [0x01] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
140 /* 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",
141 /* DISCONNECT_REQ */ [0x04] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
142 /* LISTEN_REQ */ [0x05] = "\x03\x25\x12\x13\x10\x11\x01",
143 /* INFO_REQ */ [0x08] = "\x03\x0e\x04\x0c\x27\x2f\x1c\x01\x01",
144 /* FACILITY_REQ */ [0x09] = "\x03\x1f\x1e\x01",
145 /* SELECT_B_PROTOCOL_REQ */ [0x0a] = "\x03\x0d\x06\x08\x0a\x05\x07\x09\x01\x01",
146 /* CONNECT_B3_REQ */ [0x0b] = "\x03\x2b\x01",
147 /* DISCONNECT_B3_REQ */ [0x0d] = "\x03\x2b\x01",
148 /* DATA_B3_REQ */ [0x0f] = "\x03\x18\x1a\x19\x20\x01",
149 /* RESET_B3_REQ */ [0x10] = "\x03\x2b\x01",
150 /* ALERT_CONF */ [0x13] = "\x03\x23\x01",
151 /* CONNECT_CONF */ [0x14] = "\x03\x23\x01",
152 /* DISCONNECT_CONF */ [0x16] = "\x03\x23\x01",
153 /* LISTEN_CONF */ [0x17] = "\x03\x23\x01",
154 /* MANUFACTURER_REQ */ [0x18] = "\x03\x2a\x15\x21\x29\x01",
155 /* INFO_CONF */ [0x1a] = "\x03\x23\x01",
156 /* FACILITY_CONF */ [0x1b] = "\x03\x23\x1f\x1b\x01",
157 /* SELECT_B_PROTOCOL_CONF */ [0x1c] = "\x03\x23\x01",
158 /* CONNECT_B3_CONF */ [0x1d] = "\x03\x23\x01",
159 /* DISCONNECT_B3_CONF */ [0x1f] = "\x03\x23\x01",
160 /* DATA_B3_CONF */ [0x21] = "\x03\x19\x23\x01",
161 /* RESET_B3_CONF */ [0x22] = "\x03\x23\x01",
162 /* CONNECT_IND */ [0x26] = "\x03\x14\x0e\x10\x0f\x11\x0b\x28\x22\x04\x0c\x27\x2f\x1c\x01\x01",
163 /* CONNECT_ACTIVE_IND */ [0x27] = "\x03\x16\x17\x28\x01",
164 /* DISCONNECT_IND */ [0x28] = "\x03\x2c\x01",
165 /* MANUFACTURER_CONF */ [0x2a] = "\x03\x2a\x15\x21\x29\x01",
166 /* INFO_IND */ [0x2c] = "\x03\x26\x24\x01",
167 /* FACILITY_IND */ [0x2d] = "\x03\x1f\x1d\x01",
168 /* CONNECT_B3_IND */ [0x2f] = "\x03\x2b\x01",
169 /* CONNECT_B3_ACTIVE_IND */ [0x30] = "\x03\x2b\x01",
170 /* DISCONNECT_B3_IND */ [0x31] = "\x03\x2d\x2b\x01",
171 /* DATA_B3_IND */ [0x33] = "\x03\x18\x1a\x19\x20\x01",
172 /* RESET_B3_IND */ [0x34] = "\x03\x2b\x01",
173 /* CONNECT_B3_T90_ACTIVE_IND */ [0x35] = "\x03\x2b\x01",
174 /* CONNECT_RESP */ [0x38] = "\x03\x2e\x0d\x06\x08\x0a\x05\x07\x09\x01\x16\x17\x28\x04\x0c\x27\x2f\x1c\x01\x01",
175 /* CONNECT_ACTIVE_RESP */ [0x39] = "\x03\x01",
176 /* DISCONNECT_RESP */ [0x3a] = "\x03\x01",
177 /* MANUFACTURER_IND */ [0x3c] = "\x03\x2a\x15\x21\x29\x01",
178 /* INFO_RESP */ [0x3e] = "\x03\x01",
179 /* FACILITY_RESP */ [0x3f] = "\x03\x1f\x01",
180 /* CONNECT_B3_RESP */ [0x41] = "\x03\x2e\x2b\x01",
181 /* CONNECT_B3_ACTIVE_RESP */ [0x42] = "\x03\x01",
182 /* DISCONNECT_B3_RESP */ [0x43] = "\x03\x01",
183 /* DATA_B3_RESP */ [0x45] = "\x03\x19\x01",
184 /* RESET_B3_RESP */ [0x46] = "\x03\x01",
185 /* CONNECT_B3_T90_ACTIVE_RESP */ [0x47] = "\x03\x01",
186 /* MANUFACTURER_RESP */ [0x4e] = "\x03\x2a\x15\x21\x29\x01",
187 };
188
189 /*-------------------------------------------------------*/
190
191 #define byteTLcpy(x, y) *(u8 *)(x) = *(u8 *)(y);
192 #define wordTLcpy(x, y) *(u16 *)(x) = *(u16 *)(y);
193 #define dwordTLcpy(x, y) memcpy(x, y, 4);
194 #define structTLcpy(x, y, l) memcpy(x, y, l)
195 #define structTLcpyovl(x, y, l) memmove(x, y, l)
196
197 #define byteTRcpy(x, y) *(u8 *)(y) = *(u8 *)(x);
198 #define wordTRcpy(x, y) *(u16 *)(y) = *(u16 *)(x);
199 #define dwordTRcpy(x, y) memcpy(y, x, 4);
200 #define structTRcpy(x, y, l) memcpy(y, x, l)
201 #define structTRcpyovl(x, y, l) memmove(y, x, l)
202
203 /*-------------------------------------------------------*/
command_2_index(u8 c,u8 sc)204 static unsigned command_2_index(u8 c, u8 sc)
205 {
206 if (c & 0x80)
207 c = 0x9 + (c & 0x0f);
208 else if (c == 0x41)
209 c = 0x9 + 0x1;
210 if (c > 0x18)
211 c = 0x00;
212 return (sc & 3) * (0x9 + 0x9) + c;
213 }
214
215 /**
216 * capi_cmd2par() - find parameter string for CAPI 2.0 command/subcommand
217 * @cmd: command number
218 * @subcmd: subcommand number
219 *
220 * Return value: static string, NULL if command/subcommand unknown
221 */
222
capi_cmd2par(u8 cmd,u8 subcmd)223 static unsigned char *capi_cmd2par(u8 cmd, u8 subcmd)
224 {
225 return cpars[command_2_index(cmd, subcmd)];
226 }
227
228 /*-------------------------------------------------------*/
229 #define TYP (cdef[cmsg->par[cmsg->p]].typ)
230 #define OFF (((u8 *)cmsg) + cdef[cmsg->par[cmsg->p]].off)
231
jumpcstruct(_cmsg * cmsg)232 static void jumpcstruct(_cmsg *cmsg)
233 {
234 unsigned layer;
235 for (cmsg->p++, layer = 1; layer;) {
236 /* $$$$$ assert (cmsg->p); */
237 cmsg->p++;
238 switch (TYP) {
239 case _CMSTRUCT:
240 layer++;
241 break;
242 case _CEND:
243 layer--;
244 break;
245 }
246 }
247 }
248 /*-------------------------------------------------------*/
pars_2_message(_cmsg * cmsg)249 static void pars_2_message(_cmsg *cmsg)
250 {
251
252 for (; TYP != _CEND; cmsg->p++) {
253 switch (TYP) {
254 case _CBYTE:
255 byteTLcpy(cmsg->m + cmsg->l, OFF);
256 cmsg->l++;
257 break;
258 case _CWORD:
259 wordTLcpy(cmsg->m + cmsg->l, OFF);
260 cmsg->l += 2;
261 break;
262 case _CDWORD:
263 dwordTLcpy(cmsg->m + cmsg->l, OFF);
264 cmsg->l += 4;
265 break;
266 case _CSTRUCT:
267 if (*(u8 **) OFF == NULL) {
268 *(cmsg->m + cmsg->l) = '\0';
269 cmsg->l++;
270 } else if (**(_cstruct *) OFF != 0xff) {
271 structTLcpy(cmsg->m + cmsg->l, *(_cstruct *) OFF, 1 + **(_cstruct *) OFF);
272 cmsg->l += 1 + **(_cstruct *) OFF;
273 } else {
274 _cstruct s = *(_cstruct *) OFF;
275 structTLcpy(cmsg->m + cmsg->l, s, 3 + *(u16 *) (s + 1));
276 cmsg->l += 3 + *(u16 *) (s + 1);
277 }
278 break;
279 case _CMSTRUCT:
280 /*----- Metastruktur 0 -----*/
281 if (*(_cmstruct *) OFF == CAPI_DEFAULT) {
282 *(cmsg->m + cmsg->l) = '\0';
283 cmsg->l++;
284 jumpcstruct(cmsg);
285 }
286 /*----- Metastruktur wird composed -----*/
287 else {
288 unsigned _l = cmsg->l;
289 unsigned _ls;
290 cmsg->l++;
291 cmsg->p++;
292 pars_2_message(cmsg);
293 _ls = cmsg->l - _l - 1;
294 if (_ls < 255)
295 (cmsg->m + _l)[0] = (u8) _ls;
296 else {
297 structTLcpyovl(cmsg->m + _l + 3, cmsg->m + _l + 1, _ls);
298 (cmsg->m + _l)[0] = 0xff;
299 wordTLcpy(cmsg->m + _l + 1, &_ls);
300 }
301 }
302 break;
303 }
304 }
305 }
306
307 /**
308 * capi_cmsg2message() - assemble CAPI 2.0 message from _cmsg structure
309 * @cmsg: _cmsg structure
310 * @msg: buffer for assembled message
311 *
312 * Return value: 0 for success
313 */
314
capi_cmsg2message(_cmsg * cmsg,u8 * msg)315 unsigned capi_cmsg2message(_cmsg *cmsg, u8 *msg)
316 {
317 cmsg->m = msg;
318 cmsg->l = 8;
319 cmsg->p = 0;
320 cmsg->par = capi_cmd2par(cmsg->Command, cmsg->Subcommand);
321 if (!cmsg->par)
322 return 1; /* invalid command/subcommand */
323
324 pars_2_message(cmsg);
325
326 wordTLcpy(msg + 0, &cmsg->l);
327 byteTLcpy(cmsg->m + 4, &cmsg->Command);
328 byteTLcpy(cmsg->m + 5, &cmsg->Subcommand);
329 wordTLcpy(cmsg->m + 2, &cmsg->ApplId);
330 wordTLcpy(cmsg->m + 6, &cmsg->Messagenumber);
331
332 return 0;
333 }
334
335 /*-------------------------------------------------------*/
message_2_pars(_cmsg * cmsg)336 static void message_2_pars(_cmsg *cmsg)
337 {
338 for (; TYP != _CEND; cmsg->p++) {
339
340 switch (TYP) {
341 case _CBYTE:
342 byteTRcpy(cmsg->m + cmsg->l, OFF);
343 cmsg->l++;
344 break;
345 case _CWORD:
346 wordTRcpy(cmsg->m + cmsg->l, OFF);
347 cmsg->l += 2;
348 break;
349 case _CDWORD:
350 dwordTRcpy(cmsg->m + cmsg->l, OFF);
351 cmsg->l += 4;
352 break;
353 case _CSTRUCT:
354 *(u8 **) OFF = cmsg->m + cmsg->l;
355
356 if (cmsg->m[cmsg->l] != 0xff)
357 cmsg->l += 1 + cmsg->m[cmsg->l];
358 else
359 cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
360 break;
361 case _CMSTRUCT:
362 /*----- Metastruktur 0 -----*/
363 if (cmsg->m[cmsg->l] == '\0') {
364 *(_cmstruct *) OFF = CAPI_DEFAULT;
365 cmsg->l++;
366 jumpcstruct(cmsg);
367 } else {
368 unsigned _l = cmsg->l;
369 *(_cmstruct *) OFF = CAPI_COMPOSE;
370 cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
371 cmsg->p++;
372 message_2_pars(cmsg);
373 }
374 break;
375 }
376 }
377 }
378
379 /**
380 * capi_message2cmsg() - disassemble CAPI 2.0 message into _cmsg structure
381 * @cmsg: _cmsg structure
382 * @msg: buffer for assembled message
383 *
384 * Return value: 0 for success
385 */
386
capi_message2cmsg(_cmsg * cmsg,u8 * msg)387 unsigned capi_message2cmsg(_cmsg *cmsg, u8 *msg)
388 {
389 memset(cmsg, 0, sizeof(_cmsg));
390 cmsg->m = msg;
391 cmsg->l = 8;
392 cmsg->p = 0;
393 byteTRcpy(cmsg->m + 4, &cmsg->Command);
394 byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
395 cmsg->par = capi_cmd2par(cmsg->Command, cmsg->Subcommand);
396 if (!cmsg->par)
397 return 1; /* invalid command/subcommand */
398
399 message_2_pars(cmsg);
400
401 wordTRcpy(msg + 0, &cmsg->l);
402 wordTRcpy(cmsg->m + 2, &cmsg->ApplId);
403 wordTRcpy(cmsg->m + 6, &cmsg->Messagenumber);
404
405 return 0;
406 }
407
408 /**
409 * capi_cmsg_header() - initialize header part of _cmsg structure
410 * @cmsg: _cmsg structure
411 * @_ApplId: ApplID field value
412 * @_Command: Command field value
413 * @_Subcommand: Subcommand field value
414 * @_Messagenumber: Message Number field value
415 * @_Controller: Controller/PLCI/NCCI field value
416 *
417 * Return value: 0 for success
418 */
419
capi_cmsg_header(_cmsg * cmsg,u16 _ApplId,u8 _Command,u8 _Subcommand,u16 _Messagenumber,u32 _Controller)420 unsigned capi_cmsg_header(_cmsg *cmsg, u16 _ApplId,
421 u8 _Command, u8 _Subcommand,
422 u16 _Messagenumber, u32 _Controller)
423 {
424 memset(cmsg, 0, sizeof(_cmsg));
425 cmsg->ApplId = _ApplId;
426 cmsg->Command = _Command;
427 cmsg->Subcommand = _Subcommand;
428 cmsg->Messagenumber = _Messagenumber;
429 cmsg->adr.adrController = _Controller;
430 return 0;
431 }
432
433 /*-------------------------------------------------------*/
434
435 static char *mnames[] =
436 {
437 [0x01] = "ALERT_REQ",
438 [0x02] = "CONNECT_REQ",
439 [0x04] = "DISCONNECT_REQ",
440 [0x05] = "LISTEN_REQ",
441 [0x08] = "INFO_REQ",
442 [0x09] = "FACILITY_REQ",
443 [0x0a] = "SELECT_B_PROTOCOL_REQ",
444 [0x0b] = "CONNECT_B3_REQ",
445 [0x0d] = "DISCONNECT_B3_REQ",
446 [0x0f] = "DATA_B3_REQ",
447 [0x10] = "RESET_B3_REQ",
448 [0x13] = "ALERT_CONF",
449 [0x14] = "CONNECT_CONF",
450 [0x16] = "DISCONNECT_CONF",
451 [0x17] = "LISTEN_CONF",
452 [0x18] = "MANUFACTURER_REQ",
453 [0x1a] = "INFO_CONF",
454 [0x1b] = "FACILITY_CONF",
455 [0x1c] = "SELECT_B_PROTOCOL_CONF",
456 [0x1d] = "CONNECT_B3_CONF",
457 [0x1f] = "DISCONNECT_B3_CONF",
458 [0x21] = "DATA_B3_CONF",
459 [0x22] = "RESET_B3_CONF",
460 [0x26] = "CONNECT_IND",
461 [0x27] = "CONNECT_ACTIVE_IND",
462 [0x28] = "DISCONNECT_IND",
463 [0x2a] = "MANUFACTURER_CONF",
464 [0x2c] = "INFO_IND",
465 [0x2d] = "FACILITY_IND",
466 [0x2f] = "CONNECT_B3_IND",
467 [0x30] = "CONNECT_B3_ACTIVE_IND",
468 [0x31] = "DISCONNECT_B3_IND",
469 [0x33] = "DATA_B3_IND",
470 [0x34] = "RESET_B3_IND",
471 [0x35] = "CONNECT_B3_T90_ACTIVE_IND",
472 [0x38] = "CONNECT_RESP",
473 [0x39] = "CONNECT_ACTIVE_RESP",
474 [0x3a] = "DISCONNECT_RESP",
475 [0x3c] = "MANUFACTURER_IND",
476 [0x3e] = "INFO_RESP",
477 [0x3f] = "FACILITY_RESP",
478 [0x41] = "CONNECT_B3_RESP",
479 [0x42] = "CONNECT_B3_ACTIVE_RESP",
480 [0x43] = "DISCONNECT_B3_RESP",
481 [0x45] = "DATA_B3_RESP",
482 [0x46] = "RESET_B3_RESP",
483 [0x47] = "CONNECT_B3_T90_ACTIVE_RESP",
484 [0x4e] = "MANUFACTURER_RESP"
485 };
486
487 /**
488 * capi_cmd2str() - convert CAPI 2.0 command/subcommand number to name
489 * @cmd: command number
490 * @subcmd: subcommand number
491 *
492 * Return value: static string
493 */
494
capi_cmd2str(u8 cmd,u8 subcmd)495 char *capi_cmd2str(u8 cmd, u8 subcmd)
496 {
497 char *result;
498
499 result = mnames[command_2_index(cmd, subcmd)];
500 if (result == NULL)
501 result = "INVALID_COMMAND";
502 return result;
503 }
504
505
506 /*-------------------------------------------------------*/
507
508 #ifdef CONFIG_CAPI_TRACE
509
510 /*-------------------------------------------------------*/
511
512 static char *pnames[] =
513 {
514 /*00 */ NULL,
515 /*01 */ NULL,
516 /*02 */ NULL,
517 /*03 */ "Controller/PLCI/NCCI",
518 /*04 */ "AdditionalInfo",
519 /*05 */ "B1configuration",
520 /*06 */ "B1protocol",
521 /*07 */ "B2configuration",
522 /*08 */ "B2protocol",
523 /*09 */ "B3configuration",
524 /*0a */ "B3protocol",
525 /*0b */ "BC",
526 /*0c */ "BChannelinformation",
527 /*0d */ "BProtocol",
528 /*0e */ "CalledPartyNumber",
529 /*0f */ "CalledPartySubaddress",
530 /*10 */ "CallingPartyNumber",
531 /*11 */ "CallingPartySubaddress",
532 /*12 */ "CIPmask",
533 /*13 */ "CIPmask2",
534 /*14 */ "CIPValue",
535 /*15 */ "Class",
536 /*16 */ "ConnectedNumber",
537 /*17 */ "ConnectedSubaddress",
538 /*18 */ "Data32",
539 /*19 */ "DataHandle",
540 /*1a */ "DataLength",
541 /*1b */ "FacilityConfirmationParameter",
542 /*1c */ "Facilitydataarray",
543 /*1d */ "FacilityIndicationParameter",
544 /*1e */ "FacilityRequestParameter",
545 /*1f */ "FacilitySelector",
546 /*20 */ "Flags",
547 /*21 */ "Function",
548 /*22 */ "HLC",
549 /*23 */ "Info",
550 /*24 */ "InfoElement",
551 /*25 */ "InfoMask",
552 /*26 */ "InfoNumber",
553 /*27 */ "Keypadfacility",
554 /*28 */ "LLC",
555 /*29 */ "ManuData",
556 /*2a */ "ManuID",
557 /*2b */ "NCPI",
558 /*2c */ "Reason",
559 /*2d */ "Reason_B3",
560 /*2e */ "Reject",
561 /*2f */ "Useruserdata"
562 };
563
564
565
566 #include <stdarg.h>
567
568 /*-------------------------------------------------------*/
bufprint(_cdebbuf * cdb,char * fmt,...)569 static _cdebbuf *bufprint(_cdebbuf *cdb, char *fmt, ...)
570 {
571 va_list f;
572 size_t n, r;
573
574 if (!cdb)
575 return NULL;
576 va_start(f, fmt);
577 r = cdb->size - cdb->pos;
578 n = vsnprintf(cdb->p, r, fmt, f);
579 va_end(f);
580 if (n >= r) {
581 /* truncated, need bigger buffer */
582 size_t ns = 2 * cdb->size;
583 u_char *nb;
584
585 while ((ns - cdb->pos) <= n)
586 ns *= 2;
587 nb = kmalloc(ns, GFP_ATOMIC);
588 if (!nb) {
589 cdebbuf_free(cdb);
590 return NULL;
591 }
592 memcpy(nb, cdb->buf, cdb->pos);
593 kfree(cdb->buf);
594 nb[cdb->pos] = 0;
595 cdb->buf = nb;
596 cdb->p = cdb->buf + cdb->pos;
597 cdb->size = ns;
598 va_start(f, fmt);
599 r = cdb->size - cdb->pos;
600 n = vsnprintf(cdb->p, r, fmt, f);
601 va_end(f);
602 }
603 cdb->p += n;
604 cdb->pos += n;
605 return cdb;
606 }
607
printstructlen(_cdebbuf * cdb,u8 * m,unsigned len)608 static _cdebbuf *printstructlen(_cdebbuf *cdb, u8 *m, unsigned len)
609 {
610 unsigned hex = 0;
611
612 if (!cdb)
613 return NULL;
614 for (; len; len--, m++)
615 if (isalnum(*m) || *m == ' ') {
616 if (hex)
617 cdb = bufprint(cdb, ">");
618 cdb = bufprint(cdb, "%c", *m);
619 hex = 0;
620 } else {
621 if (!hex)
622 cdb = bufprint(cdb, "<%02x", *m);
623 else
624 cdb = bufprint(cdb, " %02x", *m);
625 hex = 1;
626 }
627 if (hex)
628 cdb = bufprint(cdb, ">");
629 return cdb;
630 }
631
printstruct(_cdebbuf * cdb,u8 * m)632 static _cdebbuf *printstruct(_cdebbuf *cdb, u8 *m)
633 {
634 unsigned len;
635
636 if (m[0] != 0xff) {
637 len = m[0];
638 m += 1;
639 } else {
640 len = ((u16 *) (m + 1))[0];
641 m += 3;
642 }
643 cdb = printstructlen(cdb, m, len);
644 return cdb;
645 }
646
647 /*-------------------------------------------------------*/
648 #define NAME (pnames[cmsg->par[cmsg->p]])
649
protocol_message_2_pars(_cdebbuf * cdb,_cmsg * cmsg,int level)650 static _cdebbuf *protocol_message_2_pars(_cdebbuf *cdb, _cmsg *cmsg, int level)
651 {
652 if (!cmsg->par)
653 return NULL; /* invalid command/subcommand */
654
655 for (; TYP != _CEND; cmsg->p++) {
656 int slen = 29 + 3 - level;
657 int i;
658
659 if (!cdb)
660 return NULL;
661 cdb = bufprint(cdb, " ");
662 for (i = 0; i < level - 1; i++)
663 cdb = bufprint(cdb, " ");
664
665 switch (TYP) {
666 case _CBYTE:
667 cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u8 *) (cmsg->m + cmsg->l));
668 cmsg->l++;
669 break;
670 case _CWORD:
671 cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u16 *) (cmsg->m + cmsg->l));
672 cmsg->l += 2;
673 break;
674 case _CDWORD:
675 cdb = bufprint(cdb, "%-*s = 0x%lx\n", slen, NAME, *(u32 *) (cmsg->m + cmsg->l));
676 cmsg->l += 4;
677 break;
678 case _CSTRUCT:
679 cdb = bufprint(cdb, "%-*s = ", slen, NAME);
680 if (cmsg->m[cmsg->l] == '\0')
681 cdb = bufprint(cdb, "default");
682 else
683 cdb = printstruct(cdb, cmsg->m + cmsg->l);
684 cdb = bufprint(cdb, "\n");
685 if (cmsg->m[cmsg->l] != 0xff)
686 cmsg->l += 1 + cmsg->m[cmsg->l];
687 else
688 cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
689
690 break;
691
692 case _CMSTRUCT:
693 /*----- Metastruktur 0 -----*/
694 if (cmsg->m[cmsg->l] == '\0') {
695 cdb = bufprint(cdb, "%-*s = default\n", slen, NAME);
696 cmsg->l++;
697 jumpcstruct(cmsg);
698 } else {
699 char *name = NAME;
700 unsigned _l = cmsg->l;
701 cdb = bufprint(cdb, "%-*s\n", slen, name);
702 cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
703 cmsg->p++;
704 cdb = protocol_message_2_pars(cdb, cmsg, level + 1);
705 }
706 break;
707 }
708 }
709 return cdb;
710 }
711 /*-------------------------------------------------------*/
712
713 static _cdebbuf *g_debbuf;
714 static u_long g_debbuf_lock;
715 static _cmsg *g_cmsg;
716
cdebbuf_alloc(void)717 static _cdebbuf *cdebbuf_alloc(void)
718 {
719 _cdebbuf *cdb;
720
721 if (likely(!test_and_set_bit(1, &g_debbuf_lock))) {
722 cdb = g_debbuf;
723 goto init;
724 } else
725 cdb = kmalloc(sizeof(_cdebbuf), GFP_ATOMIC);
726 if (!cdb)
727 return NULL;
728 cdb->buf = kmalloc(CDEBUG_SIZE, GFP_ATOMIC);
729 if (!cdb->buf) {
730 kfree(cdb);
731 return NULL;
732 }
733 cdb->size = CDEBUG_SIZE;
734 init:
735 cdb->buf[0] = 0;
736 cdb->p = cdb->buf;
737 cdb->pos = 0;
738 return cdb;
739 }
740
741 /**
742 * cdebbuf_free() - free CAPI debug buffer
743 * @cdb: buffer to free
744 */
745
cdebbuf_free(_cdebbuf * cdb)746 void cdebbuf_free(_cdebbuf *cdb)
747 {
748 if (likely(cdb == g_debbuf)) {
749 test_and_clear_bit(1, &g_debbuf_lock);
750 return;
751 }
752 if (likely(cdb))
753 kfree(cdb->buf);
754 kfree(cdb);
755 }
756
757
758 /**
759 * capi_message2str() - format CAPI 2.0 message for printing
760 * @msg: CAPI 2.0 message
761 *
762 * Allocates a CAPI debug buffer and fills it with a printable representation
763 * of the CAPI 2.0 message in @msg.
764 * Return value: allocated debug buffer, NULL on error
765 * The returned buffer should be freed by a call to cdebbuf_free() after use.
766 */
767
capi_message2str(u8 * msg)768 _cdebbuf *capi_message2str(u8 *msg)
769 {
770 _cdebbuf *cdb;
771 _cmsg *cmsg;
772
773 cdb = cdebbuf_alloc();
774 if (unlikely(!cdb))
775 return NULL;
776 if (likely(cdb == g_debbuf))
777 cmsg = g_cmsg;
778 else
779 cmsg = kmalloc(sizeof(_cmsg), GFP_ATOMIC);
780 if (unlikely(!cmsg)) {
781 cdebbuf_free(cdb);
782 return NULL;
783 }
784 cmsg->m = msg;
785 cmsg->l = 8;
786 cmsg->p = 0;
787 byteTRcpy(cmsg->m + 4, &cmsg->Command);
788 byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
789 cmsg->par = capi_cmd2par(cmsg->Command, cmsg->Subcommand);
790
791 cdb = bufprint(cdb, "%-26s ID=%03d #0x%04x LEN=%04d\n",
792 capi_cmd2str(cmsg->Command, cmsg->Subcommand),
793 ((unsigned short *) msg)[1],
794 ((unsigned short *) msg)[3],
795 ((unsigned short *) msg)[0]);
796
797 cdb = protocol_message_2_pars(cdb, cmsg, 1);
798 if (unlikely(cmsg != g_cmsg))
799 kfree(cmsg);
800 return cdb;
801 }
802
803 /**
804 * capi_cmsg2str() - format _cmsg structure for printing
805 * @cmsg: _cmsg structure
806 *
807 * Allocates a CAPI debug buffer and fills it with a printable representation
808 * of the CAPI 2.0 message stored in @cmsg by a previous call to
809 * capi_cmsg2message() or capi_message2cmsg().
810 * Return value: allocated debug buffer, NULL on error
811 * The returned buffer should be freed by a call to cdebbuf_free() after use.
812 */
813
capi_cmsg2str(_cmsg * cmsg)814 _cdebbuf *capi_cmsg2str(_cmsg *cmsg)
815 {
816 _cdebbuf *cdb;
817
818 if (!cmsg->m)
819 return NULL; /* no message */
820 cdb = cdebbuf_alloc();
821 if (!cdb)
822 return NULL;
823 cmsg->l = 8;
824 cmsg->p = 0;
825 cdb = bufprint(cdb, "%s ID=%03d #0x%04x LEN=%04d\n",
826 capi_cmd2str(cmsg->Command, cmsg->Subcommand),
827 ((u16 *) cmsg->m)[1],
828 ((u16 *) cmsg->m)[3],
829 ((u16 *) cmsg->m)[0]);
830 cdb = protocol_message_2_pars(cdb, cmsg, 1);
831 return cdb;
832 }
833
cdebug_init(void)834 int __init cdebug_init(void)
835 {
836 g_cmsg = kmalloc(sizeof(_cmsg), GFP_KERNEL);
837 if (!g_cmsg)
838 return -ENOMEM;
839 g_debbuf = kmalloc(sizeof(_cdebbuf), GFP_KERNEL);
840 if (!g_debbuf) {
841 kfree(g_cmsg);
842 return -ENOMEM;
843 }
844 g_debbuf->buf = kmalloc(CDEBUG_GSIZE, GFP_KERNEL);
845 if (!g_debbuf->buf) {
846 kfree(g_cmsg);
847 kfree(g_debbuf);
848 return -ENOMEM;
849 }
850 g_debbuf->size = CDEBUG_GSIZE;
851 g_debbuf->buf[0] = 0;
852 g_debbuf->p = g_debbuf->buf;
853 g_debbuf->pos = 0;
854 return 0;
855 }
856
cdebug_exit(void)857 void __exit cdebug_exit(void)
858 {
859 if (g_debbuf)
860 kfree(g_debbuf->buf);
861 kfree(g_debbuf);
862 kfree(g_cmsg);
863 }
864
865 #else /* !CONFIG_CAPI_TRACE */
866
867 static _cdebbuf g_debbuf = {"CONFIG_CAPI_TRACE not enabled", NULL, 0, 0};
868
capi_message2str(u8 * msg)869 _cdebbuf *capi_message2str(u8 *msg)
870 {
871 return &g_debbuf;
872 }
873
capi_cmsg2str(_cmsg * cmsg)874 _cdebbuf *capi_cmsg2str(_cmsg *cmsg)
875 {
876 return &g_debbuf;
877 }
878
cdebbuf_free(_cdebbuf * cdb)879 void cdebbuf_free(_cdebbuf *cdb)
880 {
881 }
882
cdebug_init(void)883 int __init cdebug_init(void)
884 {
885 return 0;
886 }
887
cdebug_exit(void)888 void __exit cdebug_exit(void)
889 {
890 }
891
892 #endif
893
894 EXPORT_SYMBOL(cdebbuf_free);
895 EXPORT_SYMBOL(capi_cmsg2message);
896 EXPORT_SYMBOL(capi_message2cmsg);
897 EXPORT_SYMBOL(capi_cmsg_header);
898 EXPORT_SYMBOL(capi_cmd2str);
899 EXPORT_SYMBOL(capi_cmsg2str);
900 EXPORT_SYMBOL(capi_message2str);
901