CAPI: Silence lockdep warning on get_capi_appl_by_nr usage
[linux-2.6.git] / drivers / isdn / capi / capiutil.c
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 #ifndef CONFIG_ISDN_DRV_AVMB1_VERBOSE_REASON
26 char *capi_info2str(u16 reason)
27 {
28     return "..";
29 }
30 #else
31 char *capi_info2str(u16 reason)
32 {
33     switch (reason) {
34
35 /*-- informative values (corresponding message was processed) -----*/
36         case 0x0001:
37            return "NCPI not supported by current protocol, NCPI ignored";
38         case 0x0002:
39            return "Flags not supported by current protocol, flags ignored";
40         case 0x0003:
41            return "Alert already sent by another application";
42
43 /*-- error information concerning CAPI_REGISTER -----*/
44         case 0x1001:
45            return "Too many applications";
46         case 0x1002:
47            return "Logical block size too small, must be at least 128 Bytes";
48         case 0x1003:
49            return "Buffer exceeds 64 kByte";
50         case 0x1004:
51            return "Message buffer size too small, must be at least 1024 Bytes";
52         case 0x1005:
53            return "Max. number of logical connections not supported";
54         case 0x1006:
55            return "Reserved";
56         case 0x1007:
57            return "The message could not be accepted because of an internal busy condition";
58         case 0x1008:
59            return "OS resource error (no memory ?)";
60         case 0x1009:
61            return "CAPI not installed";
62         case 0x100A:
63            return "Controller does not support external equipment";
64         case 0x100B:
65            return "Controller does only support external equipment";
66
67 /*-- error information concerning message exchange functions -----*/
68         case 0x1101:
69            return "Illegal application number";
70         case 0x1102:
71            return "Illegal command or subcommand or message length less than 12 bytes";
72         case 0x1103:
73            return "The message could not be accepted because of a queue full condition !! The error code does not imply that CAPI cannot receive messages directed to another controller, PLCI or NCCI";
74         case 0x1104:
75            return "Queue is empty";
76         case 0x1105:
77            return "Queue overflow, a message was lost !! This indicates a configuration error. The only recovery from this error is to perform a CAPI_RELEASE";
78         case 0x1106:
79            return "Unknown notification parameter";
80         case 0x1107:
81            return "The Message could not be accepted because of an internal busy condition";
82         case 0x1108:
83            return "OS Resource error (no memory ?)";
84         case 0x1109:
85            return "CAPI not installed";
86         case 0x110A:
87            return "Controller does not support external equipment";
88         case 0x110B:
89            return "Controller does only support external equipment";
90
91 /*-- error information concerning resource / coding problems -----*/
92         case 0x2001:
93            return "Message not supported in current state";
94         case 0x2002:
95            return "Illegal Controller / PLCI / NCCI";
96         case 0x2003:
97            return "Out of PLCI";
98         case 0x2004:
99            return "Out of NCCI";
100         case 0x2005:
101            return "Out of LISTEN";
102         case 0x2006:
103            return "Out of FAX resources (protocol T.30)";
104         case 0x2007:
105            return "Illegal message parameter coding";
106
107 /*-- error information concerning requested services  -----*/
108         case 0x3001:
109            return "B1 protocol not supported";
110         case 0x3002: 
111            return "B2 protocol not supported";
112         case 0x3003: 
113            return "B3 protocol not supported";
114         case 0x3004: 
115            return "B1 protocol parameter not supported";
116         case 0x3005: 
117            return "B2 protocol parameter not supported";
118         case 0x3006: 
119            return "B3 protocol parameter not supported";
120         case 0x3007: 
121            return "B protocol combination not supported";
122         case 0x3008: 
123            return "NCPI not supported";
124         case 0x3009: 
125            return "CIP Value unknown";
126         case 0x300A: 
127            return "Flags not supported (reserved bits)";
128         case 0x300B: 
129            return "Facility not supported";
130         case 0x300C: 
131            return "Data length not supported by current protocol";
132         case 0x300D: 
133            return "Reset procedure not supported by current protocol";
134
135 /*-- informations about the clearing of a physical connection -----*/
136         case 0x3301: 
137            return "Protocol error layer 1 (broken line or B-channel removed by signalling protocol)";
138         case 0x3302: 
139            return "Protocol error layer 2";
140         case 0x3303: 
141            return "Protocol error layer 3";
142         case 0x3304: 
143            return "Another application got that call";
144 /*-- T.30 specific reasons -----*/
145         case 0x3311: 
146            return "Connecting not successful (remote station is no FAX G3 machine)";
147         case 0x3312: 
148            return "Connecting not successful (training error)";
149         case 0x3313: 
150            return "Disconnected before transfer (remote station does not support transfer mode, e.g. resolution)";
151         case 0x3314: 
152            return "Disconnected during transfer (remote abort)";
153         case 0x3315: 
154            return "Disconnected during transfer (remote procedure error, e.g. unsuccessful repetition of T.30 commands)";
155         case 0x3316: 
156            return "Disconnected during transfer (local tx data underrun)";
157         case 0x3317: 
158            return "Disconnected during transfer (local rx data overflow)";
159         case 0x3318: 
160            return "Disconnected during transfer (local abort)";
161         case 0x3319: 
162            return "Illegal parameter coding (e.g. SFF coding error)";
163
164 /*-- disconnect causes from the network according to ETS 300 102-1/Q.931 -----*/
165         case 0x3481: return "Unallocated (unassigned) number";
166         case 0x3482: return "No route to specified transit network";
167         case 0x3483: return "No route to destination";
168         case 0x3486: return "Channel unacceptable";
169         case 0x3487: 
170            return "Call awarded and being delivered in an established channel";
171         case 0x3490: return "Normal call clearing";
172         case 0x3491: return "User busy";
173         case 0x3492: return "No user responding";
174         case 0x3493: return "No answer from user (user alerted)";
175         case 0x3495: return "Call rejected";
176         case 0x3496: return "Number changed";
177         case 0x349A: return "Non-selected user clearing";
178         case 0x349B: return "Destination out of order";
179         case 0x349C: return "Invalid number format";
180         case 0x349D: return "Facility rejected";
181         case 0x349E: return "Response to STATUS ENQUIRY";
182         case 0x349F: return "Normal, unspecified";
183         case 0x34A2: return "No circuit / channel available";
184         case 0x34A6: return "Network out of order";
185         case 0x34A9: return "Temporary failure";
186         case 0x34AA: return "Switching equipment congestion";
187         case 0x34AB: return "Access information discarded";
188         case 0x34AC: return "Requested circuit / channel not available";
189         case 0x34AF: return "Resources unavailable, unspecified";
190         case 0x34B1: return "Quality of service unavailable";
191         case 0x34B2: return "Requested facility not subscribed";
192         case 0x34B9: return "Bearer capability not authorized";
193         case 0x34BA: return "Bearer capability not presently available";
194         case 0x34BF: return "Service or option not available, unspecified";
195         case 0x34C1: return "Bearer capability not implemented";
196         case 0x34C2: return "Channel type not implemented";
197         case 0x34C5: return "Requested facility not implemented";
198         case 0x34C6: return "Only restricted digital information bearer capability is available";
199         case 0x34CF: return "Service or option not implemented, unspecified";
200         case 0x34D1: return "Invalid call reference value";
201         case 0x34D2: return "Identified channel does not exist";
202         case 0x34D3: return "A suspended call exists, but this call identity does not";
203         case 0x34D4: return "Call identity in use";
204         case 0x34D5: return "No call suspended";
205         case 0x34D6: return "Call having the requested call identity has been cleared";
206         case 0x34D8: return "Incompatible destination";
207         case 0x34DB: return "Invalid transit network selection";
208         case 0x34DF: return "Invalid message, unspecified";
209         case 0x34E0: return "Mandatory information element is missing";
210         case 0x34E1: return "Message type non-existent or not implemented";
211         case 0x34E2: return "Message not compatible with call state or message type non-existent or not implemented";
212         case 0x34E3: return "Information element non-existent or not implemented";
213         case 0x34E4: return "Invalid information element contents";
214         case 0x34E5: return "Message not compatible with call state";
215         case 0x34E6: return "Recovery on timer expiry";
216         case 0x34EF: return "Protocol error, unspecified";
217         case 0x34FF: return "Interworking, unspecified";
218
219         default: return "No additional information";
220     }
221 }
222 #endif
223
224 typedef struct {
225         int typ;
226         size_t off;
227 } _cdef;
228
229 #define _CBYTE         1
230 #define _CWORD         2
231 #define _CDWORD        3
232 #define _CSTRUCT       4
233 #define _CMSTRUCT      5
234 #define _CEND          6
235
236 static _cdef cdef[] =
237 {
238     /*00 */ 
239  {_CEND},
240     /*01 */ 
241  {_CEND},
242     /*02 */ 
243  {_CEND},
244     /*03 */ 
245  {_CDWORD, offsetof(_cmsg, adr.adrController)},
246     /*04 */ 
247  {_CMSTRUCT, offsetof(_cmsg, AdditionalInfo)},
248     /*05 */ 
249  {_CSTRUCT, offsetof(_cmsg, B1configuration)},
250     /*06 */ 
251  {_CWORD, offsetof(_cmsg, B1protocol)},
252     /*07 */ 
253  {_CSTRUCT, offsetof(_cmsg, B2configuration)},
254     /*08 */ 
255  {_CWORD, offsetof(_cmsg, B2protocol)},
256     /*09 */ 
257  {_CSTRUCT, offsetof(_cmsg, B3configuration)},
258     /*0a */ 
259  {_CWORD, offsetof(_cmsg, B3protocol)},
260     /*0b */ 
261  {_CSTRUCT, offsetof(_cmsg, BC)},
262     /*0c */ 
263  {_CSTRUCT, offsetof(_cmsg, BChannelinformation)},
264     /*0d */ 
265  {_CMSTRUCT, offsetof(_cmsg, BProtocol)},
266     /*0e */ 
267  {_CSTRUCT, offsetof(_cmsg, CalledPartyNumber)},
268     /*0f */ 
269  {_CSTRUCT, offsetof(_cmsg, CalledPartySubaddress)},
270     /*10 */ 
271  {_CSTRUCT, offsetof(_cmsg, CallingPartyNumber)},
272     /*11 */ 
273  {_CSTRUCT, offsetof(_cmsg, CallingPartySubaddress)},
274     /*12 */ 
275  {_CDWORD, offsetof(_cmsg, CIPmask)},
276     /*13 */ 
277  {_CDWORD, offsetof(_cmsg, CIPmask2)},
278     /*14 */ 
279  {_CWORD, offsetof(_cmsg, CIPValue)},
280     /*15 */ 
281  {_CDWORD, offsetof(_cmsg, Class)},
282     /*16 */ 
283  {_CSTRUCT, offsetof(_cmsg, ConnectedNumber)},
284     /*17 */ 
285  {_CSTRUCT, offsetof(_cmsg, ConnectedSubaddress)},
286     /*18 */ 
287  {_CDWORD, offsetof(_cmsg, Data)},
288     /*19 */ 
289  {_CWORD, offsetof(_cmsg, DataHandle)},
290     /*1a */ 
291  {_CWORD, offsetof(_cmsg, DataLength)},
292     /*1b */ 
293  {_CSTRUCT, offsetof(_cmsg, FacilityConfirmationParameter)},
294     /*1c */ 
295  {_CSTRUCT, offsetof(_cmsg, Facilitydataarray)},
296     /*1d */ 
297  {_CSTRUCT, offsetof(_cmsg, FacilityIndicationParameter)},
298     /*1e */ 
299  {_CSTRUCT, offsetof(_cmsg, FacilityRequestParameter)},
300     /*1f */ 
301  {_CWORD, offsetof(_cmsg, FacilitySelector)},
302     /*20 */ 
303  {_CWORD, offsetof(_cmsg, Flags)},
304     /*21 */ 
305  {_CDWORD, offsetof(_cmsg, Function)},
306     /*22 */ 
307  {_CSTRUCT, offsetof(_cmsg, HLC)},
308     /*23 */ 
309  {_CWORD, offsetof(_cmsg, Info)},
310     /*24 */ 
311  {_CSTRUCT, offsetof(_cmsg, InfoElement)},
312     /*25 */ 
313  {_CDWORD, offsetof(_cmsg, InfoMask)},
314     /*26 */ 
315  {_CWORD, offsetof(_cmsg, InfoNumber)},
316     /*27 */ 
317  {_CSTRUCT, offsetof(_cmsg, Keypadfacility)},
318     /*28 */ 
319  {_CSTRUCT, offsetof(_cmsg, LLC)},
320     /*29 */ 
321  {_CSTRUCT, offsetof(_cmsg, ManuData)},
322     /*2a */ 
323  {_CDWORD, offsetof(_cmsg, ManuID)},
324     /*2b */ 
325  {_CSTRUCT, offsetof(_cmsg, NCPI)},
326     /*2c */ 
327  {_CWORD, offsetof(_cmsg, Reason)},
328     /*2d */ 
329  {_CWORD, offsetof(_cmsg, Reason_B3)},
330     /*2e */ 
331  {_CWORD, offsetof(_cmsg, Reject)},
332     /*2f */ 
333  {_CSTRUCT, offsetof(_cmsg, Useruserdata)}
334 };
335
336 static unsigned char *cpars[] =
337 {
338     /* ALERT_REQ */ [0x01] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
339     /* 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",
340     /* DISCONNECT_REQ */ [0x04] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
341     /* LISTEN_REQ */ [0x05] = "\x03\x25\x12\x13\x10\x11\x01",
342     /* INFO_REQ */ [0x08] = "\x03\x0e\x04\x0c\x27\x2f\x1c\x01\x01",
343     /* FACILITY_REQ */ [0x09] = "\x03\x1f\x1e\x01",
344     /* SELECT_B_PROTOCOL_REQ */ [0x0a] = "\x03\x0d\x06\x08\x0a\x05\x07\x09\x01\x01",
345     /* CONNECT_B3_REQ */ [0x0b] = "\x03\x2b\x01",
346     /* DISCONNECT_B3_REQ */ [0x0d] = "\x03\x2b\x01",
347     /* DATA_B3_REQ */ [0x0f] = "\x03\x18\x1a\x19\x20\x01",
348     /* RESET_B3_REQ */ [0x10] = "\x03\x2b\x01",
349     /* ALERT_CONF */ [0x13] = "\x03\x23\x01",
350     /* CONNECT_CONF */ [0x14] = "\x03\x23\x01",
351     /* DISCONNECT_CONF */ [0x16] = "\x03\x23\x01",
352     /* LISTEN_CONF */ [0x17] = "\x03\x23\x01",
353     /* MANUFACTURER_REQ */ [0x18] = "\x03\x2a\x15\x21\x29\x01",
354     /* INFO_CONF */ [0x1a] = "\x03\x23\x01",
355     /* FACILITY_CONF */ [0x1b] = "\x03\x23\x1f\x1b\x01",
356     /* SELECT_B_PROTOCOL_CONF */ [0x1c] = "\x03\x23\x01",
357     /* CONNECT_B3_CONF */ [0x1d] = "\x03\x23\x01",
358     /* DISCONNECT_B3_CONF */ [0x1f] = "\x03\x23\x01",
359     /* DATA_B3_CONF */ [0x21] = "\x03\x19\x23\x01",
360     /* RESET_B3_CONF */ [0x22] = "\x03\x23\x01",
361     /* CONNECT_IND */ [0x26] = "\x03\x14\x0e\x10\x0f\x11\x0b\x28\x22\x04\x0c\x27\x2f\x1c\x01\x01",
362     /* CONNECT_ACTIVE_IND */ [0x27] = "\x03\x16\x17\x28\x01",
363     /* DISCONNECT_IND */ [0x28] = "\x03\x2c\x01",
364     /* MANUFACTURER_CONF */ [0x2a] = "\x03\x2a\x15\x21\x29\x01",
365     /* INFO_IND */ [0x2c] = "\x03\x26\x24\x01",
366     /* FACILITY_IND */ [0x2d] = "\x03\x1f\x1d\x01",
367     /* CONNECT_B3_IND */ [0x2f] = "\x03\x2b\x01",
368     /* CONNECT_B3_ACTIVE_IND */ [0x30] = "\x03\x2b\x01",
369     /* DISCONNECT_B3_IND */ [0x31] = "\x03\x2d\x2b\x01",
370     /* DATA_B3_IND */ [0x33] = "\x03\x18\x1a\x19\x20\x01",
371     /* RESET_B3_IND */ [0x34] = "\x03\x2b\x01",
372     /* CONNECT_B3_T90_ACTIVE_IND */ [0x35] = "\x03\x2b\x01",
373     /* CONNECT_RESP */ [0x38] = "\x03\x2e\x0d\x06\x08\x0a\x05\x07\x09\x01\x16\x17\x28\x04\x0c\x27\x2f\x1c\x01\x01",
374     /* CONNECT_ACTIVE_RESP */ [0x39] = "\x03\x01",
375     /* DISCONNECT_RESP */ [0x3a] = "\x03\x01",
376     /* MANUFACTURER_IND */ [0x3c] = "\x03\x2a\x15\x21\x29\x01",
377     /* INFO_RESP */ [0x3e] = "\x03\x01",
378     /* FACILITY_RESP */ [0x3f] = "\x03\x1f\x01",
379     /* CONNECT_B3_RESP */ [0x41] = "\x03\x2e\x2b\x01",
380     /* CONNECT_B3_ACTIVE_RESP */ [0x42] = "\x03\x01",
381     /* DISCONNECT_B3_RESP */ [0x43] = "\x03\x01",
382     /* DATA_B3_RESP */ [0x45] = "\x03\x19\x01",
383     /* RESET_B3_RESP */ [0x46] = "\x03\x01",
384     /* CONNECT_B3_T90_ACTIVE_RESP */ [0x47] = "\x03\x01",
385     /* MANUFACTURER_RESP */ [0x4e] = "\x03\x2a\x15\x21\x29\x01",
386 };
387
388 /*-------------------------------------------------------*/
389
390 #define byteTLcpy(x,y)        *(u8 *)(x)=*(u8 *)(y);
391 #define wordTLcpy(x,y)        *(u16 *)(x)=*(u16 *)(y);
392 #define dwordTLcpy(x,y)       memcpy(x,y,4);
393 #define structTLcpy(x,y,l)    memcpy (x,y,l)
394 #define structTLcpyovl(x,y,l) memmove (x,y,l)
395
396 #define byteTRcpy(x,y)        *(u8 *)(y)=*(u8 *)(x);
397 #define wordTRcpy(x,y)        *(u16 *)(y)=*(u16 *)(x);
398 #define dwordTRcpy(x,y)       memcpy(y,x,4);
399 #define structTRcpy(x,y,l)    memcpy (y,x,l)
400 #define structTRcpyovl(x,y,l) memmove (y,x,l)
401
402 /*-------------------------------------------------------*/
403 static unsigned command_2_index(unsigned c, unsigned sc)
404 {
405         if (c & 0x80)
406                 c = 0x9 + (c & 0x0f);
407         else if (c <= 0x0f);
408         else if (c == 0x41)
409                 c = 0x9 + 0x1;
410         else if (c == 0xff)
411                 c = 0x00;
412         return (sc & 3) * (0x9 + 0x9) + c;
413 }
414
415 /*-------------------------------------------------------*/
416 #define TYP (cdef[cmsg->par[cmsg->p]].typ)
417 #define OFF (((u8 *)cmsg)+cdef[cmsg->par[cmsg->p]].off)
418
419 static void jumpcstruct(_cmsg * cmsg)
420 {
421         unsigned layer;
422         for (cmsg->p++, layer = 1; layer;) {
423                 /* $$$$$ assert (cmsg->p); */
424                 cmsg->p++;
425                 switch (TYP) {
426                 case _CMSTRUCT:
427                         layer++;
428                         break;
429                 case _CEND:
430                         layer--;
431                         break;
432                 }
433         }
434 }
435 /*-------------------------------------------------------*/
436 static void pars_2_message(_cmsg * cmsg)
437 {
438
439         for (; TYP != _CEND; cmsg->p++) {
440                 switch (TYP) {
441                 case _CBYTE:
442                         byteTLcpy(cmsg->m + cmsg->l, OFF);
443                         cmsg->l++;
444                         break;
445                 case _CWORD:
446                         wordTLcpy(cmsg->m + cmsg->l, OFF);
447                         cmsg->l += 2;
448                         break;
449                 case _CDWORD:
450                         dwordTLcpy(cmsg->m + cmsg->l, OFF);
451                         cmsg->l += 4;
452                         break;
453                 case _CSTRUCT:
454                         if (*(u8 **) OFF == NULL) {
455                                 *(cmsg->m + cmsg->l) = '\0';
456                                 cmsg->l++;
457                         } else if (**(_cstruct *) OFF != 0xff) {
458                                 structTLcpy(cmsg->m + cmsg->l, *(_cstruct *) OFF, 1 + **(_cstruct *) OFF);
459                                 cmsg->l += 1 + **(_cstruct *) OFF;
460                         } else {
461                                 _cstruct s = *(_cstruct *) OFF;
462                                 structTLcpy(cmsg->m + cmsg->l, s, 3 + *(u16 *) (s + 1));
463                                 cmsg->l += 3 + *(u16 *) (s + 1);
464                         }
465                         break;
466                 case _CMSTRUCT:
467 /*----- Metastruktur 0 -----*/
468                         if (*(_cmstruct *) OFF == CAPI_DEFAULT) {
469                                 *(cmsg->m + cmsg->l) = '\0';
470                                 cmsg->l++;
471                                 jumpcstruct(cmsg);
472                         }
473 /*----- Metastruktur wird composed -----*/
474                         else {
475                                 unsigned _l = cmsg->l;
476                                 unsigned _ls;
477                                 cmsg->l++;
478                                 cmsg->p++;
479                                 pars_2_message(cmsg);
480                                 _ls = cmsg->l - _l - 1;
481                                 if (_ls < 255)
482                                         (cmsg->m + _l)[0] = (u8) _ls;
483                                 else {
484                                         structTLcpyovl(cmsg->m + _l + 3, cmsg->m + _l + 1, _ls);
485                                         (cmsg->m + _l)[0] = 0xff;
486                                         wordTLcpy(cmsg->m + _l + 1, &_ls);
487                                 }
488                         }
489                         break;
490                 }
491         }
492 }
493
494 /**
495  * capi_cmsg2message() - assemble CAPI 2.0 message from _cmsg structure
496  * @cmsg:       _cmsg structure
497  * @msg:        buffer for assembled message
498  *
499  * Return value: 0 for success
500  */
501
502 unsigned capi_cmsg2message(_cmsg * cmsg, u8 * msg)
503 {
504         cmsg->m = msg;
505         cmsg->l = 8;
506         cmsg->p = 0;
507         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
508
509         pars_2_message(cmsg);
510
511         wordTLcpy(msg + 0, &cmsg->l);
512         byteTLcpy(cmsg->m + 4, &cmsg->Command);
513         byteTLcpy(cmsg->m + 5, &cmsg->Subcommand);
514         wordTLcpy(cmsg->m + 2, &cmsg->ApplId);
515         wordTLcpy(cmsg->m + 6, &cmsg->Messagenumber);
516
517         return 0;
518 }
519
520 /*-------------------------------------------------------*/
521 static void message_2_pars(_cmsg * cmsg)
522 {
523         for (; TYP != _CEND; cmsg->p++) {
524
525                 switch (TYP) {
526                 case _CBYTE:
527                         byteTRcpy(cmsg->m + cmsg->l, OFF);
528                         cmsg->l++;
529                         break;
530                 case _CWORD:
531                         wordTRcpy(cmsg->m + cmsg->l, OFF);
532                         cmsg->l += 2;
533                         break;
534                 case _CDWORD:
535                         dwordTRcpy(cmsg->m + cmsg->l, OFF);
536                         cmsg->l += 4;
537                         break;
538                 case _CSTRUCT:
539                         *(u8 **) OFF = cmsg->m + cmsg->l;
540
541                         if (cmsg->m[cmsg->l] != 0xff)
542                                 cmsg->l += 1 + cmsg->m[cmsg->l];
543                         else
544                                 cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
545                         break;
546                 case _CMSTRUCT:
547 /*----- Metastruktur 0 -----*/
548                         if (cmsg->m[cmsg->l] == '\0') {
549                                 *(_cmstruct *) OFF = CAPI_DEFAULT;
550                                 cmsg->l++;
551                                 jumpcstruct(cmsg);
552                         } else {
553                                 unsigned _l = cmsg->l;
554                                 *(_cmstruct *) OFF = CAPI_COMPOSE;
555                                 cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
556                                 cmsg->p++;
557                                 message_2_pars(cmsg);
558                         }
559                         break;
560                 }
561         }
562 }
563
564 /**
565  * capi_message2cmsg() - disassemble CAPI 2.0 message into _cmsg structure
566  * @cmsg:       _cmsg structure
567  * @msg:        buffer for assembled message
568  *
569  * Return value: 0 for success
570  */
571
572 unsigned capi_message2cmsg(_cmsg * cmsg, u8 * msg)
573 {
574         memset(cmsg, 0, sizeof(_cmsg));
575         cmsg->m = msg;
576         cmsg->l = 8;
577         cmsg->p = 0;
578         byteTRcpy(cmsg->m + 4, &cmsg->Command);
579         byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
580         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
581
582         message_2_pars(cmsg);
583
584         wordTRcpy(msg + 0, &cmsg->l);
585         wordTRcpy(cmsg->m + 2, &cmsg->ApplId);
586         wordTRcpy(cmsg->m + 6, &cmsg->Messagenumber);
587
588         return 0;
589 }
590
591 /**
592  * capi_cmsg_header() - initialize header part of _cmsg structure
593  * @cmsg:       _cmsg structure
594  * @_ApplId:    ApplID field value
595  * @_Command:   Command field value
596  * @_Subcommand:        Subcommand field value
597  * @_Messagenumber:     Message Number field value
598  * @_Controller:        Controller/PLCI/NCCI field value
599  *
600  * Return value: 0 for success
601  */
602
603 unsigned capi_cmsg_header(_cmsg * cmsg, u16 _ApplId,
604                           u8 _Command, u8 _Subcommand,
605                           u16 _Messagenumber, u32 _Controller)
606 {
607         memset(cmsg, 0, sizeof(_cmsg));
608         cmsg->ApplId = _ApplId;
609         cmsg->Command = _Command;
610         cmsg->Subcommand = _Subcommand;
611         cmsg->Messagenumber = _Messagenumber;
612         cmsg->adr.adrController = _Controller;
613         return 0;
614 }
615
616 /*-------------------------------------------------------*/
617
618 static char *mnames[] =
619 {
620         [0x01] = "ALERT_REQ",
621         [0x02] = "CONNECT_REQ",
622         [0x04] = "DISCONNECT_REQ",
623         [0x05] = "LISTEN_REQ",
624         [0x08] = "INFO_REQ",
625         [0x09] = "FACILITY_REQ",
626         [0x0a] = "SELECT_B_PROTOCOL_REQ",
627         [0x0b] = "CONNECT_B3_REQ",
628         [0x0d] = "DISCONNECT_B3_REQ",
629         [0x0f] = "DATA_B3_REQ",
630         [0x10] = "RESET_B3_REQ",
631         [0x13] = "ALERT_CONF",
632         [0x14] = "CONNECT_CONF",
633         [0x16] = "DISCONNECT_CONF",
634         [0x17] = "LISTEN_CONF",
635         [0x18] = "MANUFACTURER_REQ",
636         [0x1a] = "INFO_CONF",
637         [0x1b] = "FACILITY_CONF",
638         [0x1c] = "SELECT_B_PROTOCOL_CONF",
639         [0x1d] = "CONNECT_B3_CONF",
640         [0x1f] = "DISCONNECT_B3_CONF",
641         [0x21] = "DATA_B3_CONF",
642         [0x22] = "RESET_B3_CONF",
643         [0x26] = "CONNECT_IND",
644         [0x27] = "CONNECT_ACTIVE_IND",
645         [0x28] = "DISCONNECT_IND",
646         [0x2a] = "MANUFACTURER_CONF",
647         [0x2c] = "INFO_IND",
648         [0x2d] = "FACILITY_IND",
649         [0x2f] = "CONNECT_B3_IND",
650         [0x30] = "CONNECT_B3_ACTIVE_IND",
651         [0x31] = "DISCONNECT_B3_IND",
652         [0x33] = "DATA_B3_IND",
653         [0x34] = "RESET_B3_IND",
654         [0x35] = "CONNECT_B3_T90_ACTIVE_IND",
655         [0x38] = "CONNECT_RESP",
656         [0x39] = "CONNECT_ACTIVE_RESP",
657         [0x3a] = "DISCONNECT_RESP",
658         [0x3c] = "MANUFACTURER_IND",
659         [0x3e] = "INFO_RESP",
660         [0x3f] = "FACILITY_RESP",
661         [0x41] = "CONNECT_B3_RESP",
662         [0x42] = "CONNECT_B3_ACTIVE_RESP",
663         [0x43] = "DISCONNECT_B3_RESP",
664         [0x45] = "DATA_B3_RESP",
665         [0x46] = "RESET_B3_RESP",
666         [0x47] = "CONNECT_B3_T90_ACTIVE_RESP",
667         [0x4e] = "MANUFACTURER_RESP"
668 };
669
670 /**
671  * capi_cmd2str() - convert CAPI 2.0 command/subcommand number to name
672  * @cmd:        command number
673  * @subcmd:     subcommand number
674  *
675  * Return value: static string, NULL if command/subcommand unknown
676  */
677
678 char *capi_cmd2str(u8 cmd, u8 subcmd)
679 {
680         return mnames[command_2_index(cmd, subcmd)];
681 }
682
683
684 /*-------------------------------------------------------*/
685
686 #ifdef CONFIG_CAPI_TRACE
687
688 /*-------------------------------------------------------*/
689
690 static char *pnames[] =
691 {
692     /*00 */ NULL,
693     /*01 */ NULL,
694     /*02 */ NULL,
695     /*03 */ "Controller/PLCI/NCCI",
696     /*04 */ "AdditionalInfo",
697     /*05 */ "B1configuration",
698     /*06 */ "B1protocol",
699     /*07 */ "B2configuration",
700     /*08 */ "B2protocol",
701     /*09 */ "B3configuration",
702     /*0a */ "B3protocol",
703     /*0b */ "BC",
704     /*0c */ "BChannelinformation",
705     /*0d */ "BProtocol",
706     /*0e */ "CalledPartyNumber",
707     /*0f */ "CalledPartySubaddress",
708     /*10 */ "CallingPartyNumber",
709     /*11 */ "CallingPartySubaddress",
710     /*12 */ "CIPmask",
711     /*13 */ "CIPmask2",
712     /*14 */ "CIPValue",
713     /*15 */ "Class",
714     /*16 */ "ConnectedNumber",
715     /*17 */ "ConnectedSubaddress",
716     /*18 */ "Data32",
717     /*19 */ "DataHandle",
718     /*1a */ "DataLength",
719     /*1b */ "FacilityConfirmationParameter",
720     /*1c */ "Facilitydataarray",
721     /*1d */ "FacilityIndicationParameter",
722     /*1e */ "FacilityRequestParameter",
723     /*1f */ "FacilitySelector",
724     /*20 */ "Flags",
725     /*21 */ "Function",
726     /*22 */ "HLC",
727     /*23 */ "Info",
728     /*24 */ "InfoElement",
729     /*25 */ "InfoMask",
730     /*26 */ "InfoNumber",
731     /*27 */ "Keypadfacility",
732     /*28 */ "LLC",
733     /*29 */ "ManuData",
734     /*2a */ "ManuID",
735     /*2b */ "NCPI",
736     /*2c */ "Reason",
737     /*2d */ "Reason_B3",
738     /*2e */ "Reject",
739     /*2f */ "Useruserdata"
740 };
741
742
743
744 #include <stdarg.h>
745
746 /*-------------------------------------------------------*/
747 static _cdebbuf *bufprint(_cdebbuf *cdb, char *fmt,...)
748 {
749         va_list f;
750         size_t n,r;
751
752         if (!cdb)
753                 return NULL;
754         va_start(f, fmt);
755         r = cdb->size - cdb->pos;
756         n = vsnprintf(cdb->p, r, fmt, f);
757         va_end(f);
758         if (n >= r) {
759                 /* truncated, need bigger buffer */
760                 size_t ns = 2 * cdb->size;
761                 u_char *nb;
762
763                 while ((ns - cdb->pos) <= n)
764                         ns *= 2;
765                 nb = kmalloc(ns, GFP_ATOMIC);
766                 if (!nb) {
767                         cdebbuf_free(cdb);
768                         return NULL;
769                 }
770                 memcpy(nb, cdb->buf, cdb->pos);
771                 kfree(cdb->buf);
772                 nb[cdb->pos] = 0;
773                 cdb->buf = nb;
774                 cdb->p = cdb->buf + cdb->pos;
775                 cdb->size = ns;
776                 va_start(f, fmt);
777                 r = cdb->size - cdb->pos;
778                 n = vsnprintf(cdb->p, r, fmt, f);
779                 va_end(f);
780         }
781         cdb->p += n;
782         cdb->pos += n;
783         return cdb;
784 }
785
786 static _cdebbuf *printstructlen(_cdebbuf *cdb, u8 * m, unsigned len)
787 {
788         unsigned hex = 0;
789
790         if (!cdb)
791                 return NULL;
792         for (; len; len--, m++)
793                 if (isalnum(*m) || *m == ' ') {
794                         if (hex)
795                                 cdb = bufprint(cdb, ">");
796                         cdb = bufprint(cdb, "%c", *m);
797                         hex = 0;
798                 } else {
799                         if (!hex)
800                                 cdb = bufprint(cdb, "<%02x", *m);
801                         else
802                                 cdb = bufprint(cdb, " %02x", *m);
803                         hex = 1;
804                 }
805         if (hex)
806                 cdb = bufprint(cdb, ">");
807         return cdb;
808 }
809
810 static _cdebbuf *printstruct(_cdebbuf *cdb, u8 * m)
811 {
812         unsigned len;
813
814         if (m[0] != 0xff) {
815                 len = m[0];
816                 m += 1;
817         } else {
818                 len = ((u16 *) (m + 1))[0];
819                 m += 3;
820         }
821         cdb = printstructlen(cdb, m, len);
822         return cdb;
823 }
824
825 /*-------------------------------------------------------*/
826 #define NAME (pnames[cmsg->par[cmsg->p]])
827
828 static _cdebbuf *protocol_message_2_pars(_cdebbuf *cdb, _cmsg *cmsg, int level)
829 {
830         for (; TYP != _CEND; cmsg->p++) {
831                 int slen = 29 + 3 - level;
832                 int i;
833
834                 if (!cdb)
835                         return NULL;
836                 cdb = bufprint(cdb, "  ");
837                 for (i = 0; i < level - 1; i++)
838                         cdb = bufprint(cdb, " ");
839
840                 switch (TYP) {
841                 case _CBYTE:
842                         cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u8 *) (cmsg->m + cmsg->l));
843                         cmsg->l++;
844                         break;
845                 case _CWORD:
846                         cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u16 *) (cmsg->m + cmsg->l));
847                         cmsg->l += 2;
848                         break;
849                 case _CDWORD:
850                         cdb = bufprint(cdb, "%-*s = 0x%lx\n", slen, NAME, *(u32 *) (cmsg->m + cmsg->l));
851                         cmsg->l += 4;
852                         break;
853                 case _CSTRUCT:
854                         cdb = bufprint(cdb, "%-*s = ", slen, NAME);
855                         if (cmsg->m[cmsg->l] == '\0')
856                                 cdb = bufprint(cdb, "default");
857                         else
858                                 cdb = printstruct(cdb, cmsg->m + cmsg->l);
859                         cdb = bufprint(cdb, "\n");
860                         if (cmsg->m[cmsg->l] != 0xff)
861                                 cmsg->l += 1 + cmsg->m[cmsg->l];
862                         else
863                                 cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
864
865                         break;
866
867                 case _CMSTRUCT:
868 /*----- Metastruktur 0 -----*/
869                         if (cmsg->m[cmsg->l] == '\0') {
870                                 cdb = bufprint(cdb, "%-*s = default\n", slen, NAME);
871                                 cmsg->l++;
872                                 jumpcstruct(cmsg);
873                         } else {
874                                 char *name = NAME;
875                                 unsigned _l = cmsg->l;
876                                 cdb = bufprint(cdb, "%-*s\n", slen, name);
877                                 cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
878                                 cmsg->p++;
879                                 cdb = protocol_message_2_pars(cdb, cmsg, level + 1);
880                         }
881                         break;
882                 }
883         }
884         return cdb;
885 }
886 /*-------------------------------------------------------*/
887
888 static _cdebbuf *g_debbuf;
889 static u_long g_debbuf_lock;
890 static _cmsg *g_cmsg;
891
892 static _cdebbuf *cdebbuf_alloc(void)
893 {
894         _cdebbuf *cdb;
895
896         if (likely(!test_and_set_bit(1, &g_debbuf_lock))) {
897                 cdb = g_debbuf;
898                 goto init;
899         } else
900                 cdb = kmalloc(sizeof(_cdebbuf), GFP_ATOMIC);
901         if (!cdb)
902                 return NULL;
903         cdb->buf = kmalloc(CDEBUG_SIZE, GFP_ATOMIC);
904         if (!cdb->buf) {
905                 kfree(cdb);
906                 return NULL;
907         }
908         cdb->size = CDEBUG_SIZE;
909 init:
910         cdb->buf[0] = 0;
911         cdb->p = cdb->buf;
912         cdb->pos = 0;
913         return cdb;
914 }
915
916 /**
917  * cdebbuf_free() - free CAPI debug buffer
918  * @cdb:        buffer to free
919  */
920
921 void cdebbuf_free(_cdebbuf *cdb)
922 {
923         if (likely(cdb == g_debbuf)) {
924                 test_and_clear_bit(1, &g_debbuf_lock);
925                 return;
926         }
927         if (likely(cdb))
928                 kfree(cdb->buf);
929         kfree(cdb);
930 }
931
932
933 /**
934  * capi_message2str() - format CAPI 2.0 message for printing
935  * @msg:        CAPI 2.0 message
936  *
937  * Allocates a CAPI debug buffer and fills it with a printable representation
938  * of the CAPI 2.0 message in @msg.
939  * Return value: allocated debug buffer, NULL on error
940  * The returned buffer should be freed by a call to cdebbuf_free() after use.
941  */
942
943 _cdebbuf *capi_message2str(u8 * msg)
944 {
945         _cdebbuf *cdb;
946         _cmsg   *cmsg;
947
948         cdb = cdebbuf_alloc();
949         if (unlikely(!cdb))
950                 return NULL;
951         if (likely(cdb == g_debbuf))
952                 cmsg = g_cmsg;
953         else
954                 cmsg = kmalloc(sizeof(_cmsg), GFP_ATOMIC);
955         if (unlikely(!cmsg)) {
956                 cdebbuf_free(cdb);
957                 return NULL;
958         }
959         cmsg->m = msg;
960         cmsg->l = 8;
961         cmsg->p = 0;
962         byteTRcpy(cmsg->m + 4, &cmsg->Command);
963         byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
964         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
965
966         cdb = bufprint(cdb, "%-26s ID=%03d #0x%04x LEN=%04d\n",
967                  mnames[command_2_index(cmsg->Command, cmsg->Subcommand)],
968                  ((unsigned short *) msg)[1],
969                  ((unsigned short *) msg)[3],
970                  ((unsigned short *) msg)[0]);
971
972         cdb = protocol_message_2_pars(cdb, cmsg, 1);
973         if (unlikely(cmsg != g_cmsg))
974                 kfree(cmsg);
975         return cdb;
976 }
977
978 /**
979  * capi_cmsg2str() - format _cmsg structure for printing
980  * @cmsg:       _cmsg structure
981  *
982  * Allocates a CAPI debug buffer and fills it with a printable representation
983  * of the CAPI 2.0 message stored in @cmsg by a previous call to
984  * capi_cmsg2message() or capi_message2cmsg().
985  * Return value: allocated debug buffer, NULL on error
986  * The returned buffer should be freed by a call to cdebbuf_free() after use.
987  */
988
989 _cdebbuf *capi_cmsg2str(_cmsg * cmsg)
990 {
991         _cdebbuf *cdb;
992
993         if (!cmsg->m)
994                 return NULL;    /* no message */
995         cdb = cdebbuf_alloc();
996         if (!cdb)
997                 return NULL;
998         cmsg->l = 8;
999         cmsg->p = 0;
1000         cdb = bufprint(cdb, "%s ID=%03d #0x%04x LEN=%04d\n",
1001                  mnames[command_2_index(cmsg->Command, cmsg->Subcommand)],
1002                  ((u16 *) cmsg->m)[1],
1003                  ((u16 *) cmsg->m)[3],
1004                  ((u16 *) cmsg->m)[0]);
1005         cdb = protocol_message_2_pars(cdb, cmsg, 1);
1006         return cdb;
1007 }
1008
1009 int __init cdebug_init(void)
1010 {
1011         g_cmsg= kmalloc(sizeof(_cmsg), GFP_KERNEL);
1012         if (!g_cmsg)
1013                 return -ENOMEM;
1014         g_debbuf = kmalloc(sizeof(_cdebbuf), GFP_KERNEL);
1015         if (!g_debbuf) {
1016                 kfree(g_cmsg);
1017                 return -ENOMEM;
1018         }
1019         g_debbuf->buf = kmalloc(CDEBUG_GSIZE, GFP_KERNEL);
1020         if (!g_debbuf->buf) {
1021                 kfree(g_cmsg);
1022                 kfree(g_debbuf);
1023                 return -ENOMEM;
1024         }
1025         g_debbuf->size = CDEBUG_GSIZE;
1026         g_debbuf->buf[0] = 0;
1027         g_debbuf->p = g_debbuf->buf;
1028         g_debbuf->pos = 0;
1029         return 0;
1030 }
1031
1032 void __exit cdebug_exit(void)
1033 {
1034         if (g_debbuf)
1035                 kfree(g_debbuf->buf);
1036         kfree(g_debbuf);
1037         kfree(g_cmsg);
1038 }
1039
1040 #else /* !CONFIG_CAPI_TRACE */
1041
1042 static _cdebbuf g_debbuf = {"CONFIG_CAPI_TRACE not enabled", NULL, 0, 0};
1043
1044 _cdebbuf *capi_message2str(u8 * msg)
1045 {
1046         return &g_debbuf;
1047 }
1048
1049 _cdebbuf *capi_cmsg2str(_cmsg * cmsg)
1050 {
1051         return &g_debbuf;
1052 }
1053
1054 void cdebbuf_free(_cdebbuf *cdb)
1055 {
1056 }
1057
1058 int __init cdebug_init(void)
1059 {
1060         return 0;
1061 }
1062
1063 void __exit cdebug_exit(void)
1064 {
1065 }
1066
1067 #endif
1068
1069 EXPORT_SYMBOL(cdebbuf_free);
1070 EXPORT_SYMBOL(capi_cmsg2message);
1071 EXPORT_SYMBOL(capi_message2cmsg);
1072 EXPORT_SYMBOL(capi_cmsg_header);
1073 EXPORT_SYMBOL(capi_cmd2str);
1074 EXPORT_SYMBOL(capi_cmsg2str);
1075 EXPORT_SYMBOL(capi_message2str);
1076 EXPORT_SYMBOL(capi_info2str);