Merge git://git.infradead.org/mtd-2.6
[linux-2.6] / 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
22 /* from CAPI2.0 DDK AVM Berlin GmbH */
23
24 #ifndef CONFIG_ISDN_DRV_AVMB1_VERBOSE_REASON
25 char *capi_info2str(u16 reason)
26 {
27     return "..";
28 }
29 #else
30 char *capi_info2str(u16 reason)
31 {
32     switch (reason) {
33
34 /*-- informative values (corresponding message was processed) -----*/
35         case 0x0001:
36            return "NCPI not supported by current protocol, NCPI ignored";
37         case 0x0002:
38            return "Flags not supported by current protocol, flags ignored";
39         case 0x0003:
40            return "Alert already sent by another application";
41
42 /*-- error information concerning CAPI_REGISTER -----*/
43         case 0x1001:
44            return "Too many applications";
45         case 0x1002:
46            return "Logical block size too small, must be at least 128 Bytes";
47         case 0x1003:
48            return "Buffer exceeds 64 kByte";
49         case 0x1004:
50            return "Message buffer size too small, must be at least 1024 Bytes";
51         case 0x1005:
52            return "Max. number of logical connections not supported";
53         case 0x1006:
54            return "Reserved";
55         case 0x1007:
56            return "The message could not be accepted because of an internal busy condition";
57         case 0x1008:
58            return "OS resource error (no memory ?)";
59         case 0x1009:
60            return "CAPI not installed";
61         case 0x100A:
62            return "Controller does not support external equipment";
63         case 0x100B:
64            return "Controller does only support external equipment";
65
66 /*-- error information concerning message exchange functions -----*/
67         case 0x1101:
68            return "Illegal application number";
69         case 0x1102:
70            return "Illegal command or subcommand or message length less than 12 bytes";
71         case 0x1103:
72            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";
73         case 0x1104:
74            return "Queue is empty";
75         case 0x1105:
76            return "Queue overflow, a message was lost !! This indicates a configuration error. The only recovery from this error is to perform a CAPI_RELEASE";
77         case 0x1106:
78            return "Unknown notification parameter";
79         case 0x1107:
80            return "The Message could not be accepted because of an internal busy condition";
81         case 0x1108:
82            return "OS Resource error (no memory ?)";
83         case 0x1109:
84            return "CAPI not installed";
85         case 0x110A:
86            return "Controller does not support external equipment";
87         case 0x110B:
88            return "Controller does only support external equipment";
89
90 /*-- error information concerning resource / coding problems -----*/
91         case 0x2001:
92            return "Message not supported in current state";
93         case 0x2002:
94            return "Illegal Controller / PLCI / NCCI";
95         case 0x2003:
96            return "Out of PLCI";
97         case 0x2004:
98            return "Out of NCCI";
99         case 0x2005:
100            return "Out of LISTEN";
101         case 0x2006:
102            return "Out of FAX resources (protocol T.30)";
103         case 0x2007:
104            return "Illegal message parameter coding";
105
106 /*-- error information concerning requested services  -----*/
107         case 0x3001:
108            return "B1 protocol not supported";
109         case 0x3002: 
110            return "B2 protocol not supported";
111         case 0x3003: 
112            return "B3 protocol not supported";
113         case 0x3004: 
114            return "B1 protocol parameter not supported";
115         case 0x3005: 
116            return "B2 protocol parameter not supported";
117         case 0x3006: 
118            return "B3 protocol parameter not supported";
119         case 0x3007: 
120            return "B protocol combination not supported";
121         case 0x3008: 
122            return "NCPI not supported";
123         case 0x3009: 
124            return "CIP Value unknown";
125         case 0x300A: 
126            return "Flags not supported (reserved bits)";
127         case 0x300B: 
128            return "Facility not supported";
129         case 0x300C: 
130            return "Data length not supported by current protocol";
131         case 0x300D: 
132            return "Reset procedure not supported by current protocol";
133
134 /*-- informations about the clearing of a physical connection -----*/
135         case 0x3301: 
136            return "Protocol error layer 1 (broken line or B-channel removed by signalling protocol)";
137         case 0x3302: 
138            return "Protocol error layer 2";
139         case 0x3303: 
140            return "Protocol error layer 3";
141         case 0x3304: 
142            return "Another application got that call";
143 /*-- T.30 specific reasons -----*/
144         case 0x3311: 
145            return "Connecting not successful (remote station is no FAX G3 machine)";
146         case 0x3312: 
147            return "Connecting not successful (training error)";
148         case 0x3313: 
149            return "Disconnected before transfer (remote station does not support transfer mode, e.g. resolution)";
150         case 0x3314: 
151            return "Disconnected during transfer (remote abort)";
152         case 0x3315: 
153            return "Disconnected during transfer (remote procedure error, e.g. unsuccessful repetition of T.30 commands)";
154         case 0x3316: 
155            return "Disconnected during transfer (local tx data underrun)";
156         case 0x3317: 
157            return "Disconnected during transfer (local rx data overflow)";
158         case 0x3318: 
159            return "Disconnected during transfer (local abort)";
160         case 0x3319: 
161            return "Illegal parameter coding (e.g. SFF coding error)";
162
163 /*-- disconnect causes from the network according to ETS 300 102-1/Q.931 -----*/
164         case 0x3481: return "Unallocated (unassigned) number";
165         case 0x3482: return "No route to specified transit network";
166         case 0x3483: return "No route to destination";
167         case 0x3486: return "Channel unacceptable";
168         case 0x3487: 
169            return "Call awarded and being delivered in an established channel";
170         case 0x3490: return "Normal call clearing";
171         case 0x3491: return "User busy";
172         case 0x3492: return "No user responding";
173         case 0x3493: return "No answer from user (user alerted)";
174         case 0x3495: return "Call rejected";
175         case 0x3496: return "Number changed";
176         case 0x349A: return "Non-selected user clearing";
177         case 0x349B: return "Destination out of order";
178         case 0x349C: return "Invalid number format";
179         case 0x349D: return "Facility rejected";
180         case 0x349E: return "Response to STATUS ENQUIRY";
181         case 0x349F: return "Normal, unspecified";
182         case 0x34A2: return "No circuit / channel available";
183         case 0x34A6: return "Network out of order";
184         case 0x34A9: return "Temporary failure";
185         case 0x34AA: return "Switching equipment congestion";
186         case 0x34AB: return "Access information discarded";
187         case 0x34AC: return "Requested circuit / channel not available";
188         case 0x34AF: return "Resources unavailable, unspecified";
189         case 0x34B1: return "Quality of service unavailable";
190         case 0x34B2: return "Requested facility not subscribed";
191         case 0x34B9: return "Bearer capability not authorized";
192         case 0x34BA: return "Bearer capability not presently available";
193         case 0x34BF: return "Service or option not available, unspecified";
194         case 0x34C1: return "Bearer capability not implemented";
195         case 0x34C2: return "Channel type not implemented";
196         case 0x34C5: return "Requested facility not implemented";
197         case 0x34C6: return "Only restricted digital information bearer capability is available";
198         case 0x34CF: return "Service or option not implemented, unspecified";
199         case 0x34D1: return "Invalid call reference value";
200         case 0x34D2: return "Identified channel does not exist";
201         case 0x34D3: return "A suspended call exists, but this call identity does not";
202         case 0x34D4: return "Call identity in use";
203         case 0x34D5: return "No call suspended";
204         case 0x34D6: return "Call having the requested call identity has been cleared";
205         case 0x34D8: return "Incompatible destination";
206         case 0x34DB: return "Invalid transit network selection";
207         case 0x34DF: return "Invalid message, unspecified";
208         case 0x34E0: return "Mandatory information element is missing";
209         case 0x34E1: return "Message type non-existent or not implemented";
210         case 0x34E2: return "Message not compatible with call state or message type non-existent or not implemented";
211         case 0x34E3: return "Information element non-existent or not implemented";
212         case 0x34E4: return "Invalid information element contents";
213         case 0x34E5: return "Message not compatible with call state";
214         case 0x34E6: return "Recovery on timer expiry";
215         case 0x34EF: return "Protocol error, unspecified";
216         case 0x34FF: return "Interworking, unspecified";
217
218         default: return "No additional information";
219     }
220 }
221 #endif
222
223 typedef struct {
224         int typ;
225         size_t off;
226 } _cdef;
227
228 #define _CBYTE         1
229 #define _CWORD         2
230 #define _CDWORD        3
231 #define _CSTRUCT       4
232 #define _CMSTRUCT      5
233 #define _CEND          6
234
235 static _cdef cdef[] =
236 {
237     /*00 */ 
238  {_CEND},
239     /*01 */ 
240  {_CEND},
241     /*02 */ 
242  {_CEND},
243     /*03 */ 
244  {_CDWORD, offsetof(_cmsg, adr.adrController)},
245     /*04 */ 
246  {_CMSTRUCT, offsetof(_cmsg, AdditionalInfo)},
247     /*05 */ 
248  {_CSTRUCT, offsetof(_cmsg, B1configuration)},
249     /*06 */ 
250  {_CWORD, offsetof(_cmsg, B1protocol)},
251     /*07 */ 
252  {_CSTRUCT, offsetof(_cmsg, B2configuration)},
253     /*08 */ 
254  {_CWORD, offsetof(_cmsg, B2protocol)},
255     /*09 */ 
256  {_CSTRUCT, offsetof(_cmsg, B3configuration)},
257     /*0a */ 
258  {_CWORD, offsetof(_cmsg, B3protocol)},
259     /*0b */ 
260  {_CSTRUCT, offsetof(_cmsg, BC)},
261     /*0c */ 
262  {_CSTRUCT, offsetof(_cmsg, BChannelinformation)},
263     /*0d */ 
264  {_CMSTRUCT, offsetof(_cmsg, BProtocol)},
265     /*0e */ 
266  {_CSTRUCT, offsetof(_cmsg, CalledPartyNumber)},
267     /*0f */ 
268  {_CSTRUCT, offsetof(_cmsg, CalledPartySubaddress)},
269     /*10 */ 
270  {_CSTRUCT, offsetof(_cmsg, CallingPartyNumber)},
271     /*11 */ 
272  {_CSTRUCT, offsetof(_cmsg, CallingPartySubaddress)},
273     /*12 */ 
274  {_CDWORD, offsetof(_cmsg, CIPmask)},
275     /*13 */ 
276  {_CDWORD, offsetof(_cmsg, CIPmask2)},
277     /*14 */ 
278  {_CWORD, offsetof(_cmsg, CIPValue)},
279     /*15 */ 
280  {_CDWORD, offsetof(_cmsg, Class)},
281     /*16 */ 
282  {_CSTRUCT, offsetof(_cmsg, ConnectedNumber)},
283     /*17 */ 
284  {_CSTRUCT, offsetof(_cmsg, ConnectedSubaddress)},
285     /*18 */ 
286  {_CDWORD, offsetof(_cmsg, Data)},
287     /*19 */ 
288  {_CWORD, offsetof(_cmsg, DataHandle)},
289     /*1a */ 
290  {_CWORD, offsetof(_cmsg, DataLength)},
291     /*1b */ 
292  {_CSTRUCT, offsetof(_cmsg, FacilityConfirmationParameter)},
293     /*1c */ 
294  {_CSTRUCT, offsetof(_cmsg, Facilitydataarray)},
295     /*1d */ 
296  {_CSTRUCT, offsetof(_cmsg, FacilityIndicationParameter)},
297     /*1e */ 
298  {_CSTRUCT, offsetof(_cmsg, FacilityRequestParameter)},
299     /*1f */ 
300  {_CWORD, offsetof(_cmsg, FacilitySelector)},
301     /*20 */ 
302  {_CWORD, offsetof(_cmsg, Flags)},
303     /*21 */ 
304  {_CDWORD, offsetof(_cmsg, Function)},
305     /*22 */ 
306  {_CSTRUCT, offsetof(_cmsg, HLC)},
307     /*23 */ 
308  {_CWORD, offsetof(_cmsg, Info)},
309     /*24 */ 
310  {_CSTRUCT, offsetof(_cmsg, InfoElement)},
311     /*25 */ 
312  {_CDWORD, offsetof(_cmsg, InfoMask)},
313     /*26 */ 
314  {_CWORD, offsetof(_cmsg, InfoNumber)},
315     /*27 */ 
316  {_CSTRUCT, offsetof(_cmsg, Keypadfacility)},
317     /*28 */ 
318  {_CSTRUCT, offsetof(_cmsg, LLC)},
319     /*29 */ 
320  {_CSTRUCT, offsetof(_cmsg, ManuData)},
321     /*2a */ 
322  {_CDWORD, offsetof(_cmsg, ManuID)},
323     /*2b */ 
324  {_CSTRUCT, offsetof(_cmsg, NCPI)},
325     /*2c */ 
326  {_CWORD, offsetof(_cmsg, Reason)},
327     /*2d */ 
328  {_CWORD, offsetof(_cmsg, Reason_B3)},
329     /*2e */ 
330  {_CWORD, offsetof(_cmsg, Reject)},
331     /*2f */ 
332  {_CSTRUCT, offsetof(_cmsg, Useruserdata)}
333 };
334
335 static unsigned char *cpars[] =
336 {
337     /* ALERT_REQ */ [0x01] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
338     /* 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",
339     /* DISCONNECT_REQ */ [0x04] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
340     /* LISTEN_REQ */ [0x05] = "\x03\x25\x12\x13\x10\x11\x01",
341     /* INFO_REQ */ [0x08] = "\x03\x0e\x04\x0c\x27\x2f\x1c\x01\x01",
342     /* FACILITY_REQ */ [0x09] = "\x03\x1f\x1e\x01",
343     /* SELECT_B_PROTOCOL_REQ */ [0x0a] = "\x03\x0d\x06\x08\x0a\x05\x07\x09\x01\x01",
344     /* CONNECT_B3_REQ */ [0x0b] = "\x03\x2b\x01",
345     /* DISCONNECT_B3_REQ */ [0x0d] = "\x03\x2b\x01",
346     /* DATA_B3_REQ */ [0x0f] = "\x03\x18\x1a\x19\x20\x01",
347     /* RESET_B3_REQ */ [0x10] = "\x03\x2b\x01",
348     /* ALERT_CONF */ [0x13] = "\x03\x23\x01",
349     /* CONNECT_CONF */ [0x14] = "\x03\x23\x01",
350     /* DISCONNECT_CONF */ [0x16] = "\x03\x23\x01",
351     /* LISTEN_CONF */ [0x17] = "\x03\x23\x01",
352     /* MANUFACTURER_REQ */ [0x18] = "\x03\x2a\x15\x21\x29\x01",
353     /* INFO_CONF */ [0x1a] = "\x03\x23\x01",
354     /* FACILITY_CONF */ [0x1b] = "\x03\x23\x1f\x1b\x01",
355     /* SELECT_B_PROTOCOL_CONF */ [0x1c] = "\x03\x23\x01",
356     /* CONNECT_B3_CONF */ [0x1d] = "\x03\x23\x01",
357     /* DISCONNECT_B3_CONF */ [0x1f] = "\x03\x23\x01",
358     /* DATA_B3_CONF */ [0x21] = "\x03\x19\x23\x01",
359     /* RESET_B3_CONF */ [0x22] = "\x03\x23\x01",
360     /* CONNECT_IND */ [0x26] = "\x03\x14\x0e\x10\x0f\x11\x0b\x28\x22\x04\x0c\x27\x2f\x1c\x01\x01",
361     /* CONNECT_ACTIVE_IND */ [0x27] = "\x03\x16\x17\x28\x01",
362     /* DISCONNECT_IND */ [0x28] = "\x03\x2c\x01",
363     /* MANUFACTURER_CONF */ [0x2a] = "\x03\x2a\x15\x21\x29\x01",
364     /* INFO_IND */ [0x2c] = "\x03\x26\x24\x01",
365     /* FACILITY_IND */ [0x2d] = "\x03\x1f\x1d\x01",
366     /* CONNECT_B3_IND */ [0x2f] = "\x03\x2b\x01",
367     /* CONNECT_B3_ACTIVE_IND */ [0x30] = "\x03\x2b\x01",
368     /* DISCONNECT_B3_IND */ [0x31] = "\x03\x2d\x2b\x01",
369     /* DATA_B3_IND */ [0x33] = "\x03\x18\x1a\x19\x20\x01",
370     /* RESET_B3_IND */ [0x34] = "\x03\x2b\x01",
371     /* CONNECT_B3_T90_ACTIVE_IND */ [0x35] = "\x03\x2b\x01",
372     /* CONNECT_RESP */ [0x38] = "\x03\x2e\x0d\x06\x08\x0a\x05\x07\x09\x01\x16\x17\x28\x04\x0c\x27\x2f\x1c\x01\x01",
373     /* CONNECT_ACTIVE_RESP */ [0x39] = "\x03\x01",
374     /* DISCONNECT_RESP */ [0x3a] = "\x03\x01",
375     /* MANUFACTURER_IND */ [0x3c] = "\x03\x2a\x15\x21\x29\x01",
376     /* INFO_RESP */ [0x3e] = "\x03\x01",
377     /* FACILITY_RESP */ [0x3f] = "\x03\x1f\x01",
378     /* CONNECT_B3_RESP */ [0x41] = "\x03\x2e\x2b\x01",
379     /* CONNECT_B3_ACTIVE_RESP */ [0x42] = "\x03\x01",
380     /* DISCONNECT_B3_RESP */ [0x43] = "\x03\x01",
381     /* DATA_B3_RESP */ [0x45] = "\x03\x19\x01",
382     /* RESET_B3_RESP */ [0x46] = "\x03\x01",
383     /* CONNECT_B3_T90_ACTIVE_RESP */ [0x47] = "\x03\x01",
384     /* MANUFACTURER_RESP */ [0x4e] = "\x03\x2a\x15\x21\x29\x01",
385 };
386
387 /*-------------------------------------------------------*/
388
389 #define byteTLcpy(x,y)        *(u8 *)(x)=*(u8 *)(y);
390 #define wordTLcpy(x,y)        *(u16 *)(x)=*(u16 *)(y);
391 #define dwordTLcpy(x,y)       memcpy(x,y,4);
392 #define structTLcpy(x,y,l)    memcpy (x,y,l)
393 #define structTLcpyovl(x,y,l) memmove (x,y,l)
394
395 #define byteTRcpy(x,y)        *(u8 *)(y)=*(u8 *)(x);
396 #define wordTRcpy(x,y)        *(u16 *)(y)=*(u16 *)(x);
397 #define dwordTRcpy(x,y)       memcpy(y,x,4);
398 #define structTRcpy(x,y,l)    memcpy (y,x,l)
399 #define structTRcpyovl(x,y,l) memmove (y,x,l)
400
401 /*-------------------------------------------------------*/
402 static unsigned command_2_index(unsigned c, unsigned sc)
403 {
404         if (c & 0x80)
405                 c = 0x9 + (c & 0x0f);
406         else if (c <= 0x0f);
407         else if (c == 0x41)
408                 c = 0x9 + 0x1;
409         else if (c == 0xff)
410                 c = 0x00;
411         return (sc & 3) * (0x9 + 0x9) + c;
412 }
413
414 /*-------------------------------------------------------*/
415 #define TYP (cdef[cmsg->par[cmsg->p]].typ)
416 #define OFF (((u8 *)cmsg)+cdef[cmsg->par[cmsg->p]].off)
417
418 static void jumpcstruct(_cmsg * cmsg)
419 {
420         unsigned layer;
421         for (cmsg->p++, layer = 1; layer;) {
422                 /* $$$$$ assert (cmsg->p); */
423                 cmsg->p++;
424                 switch (TYP) {
425                 case _CMSTRUCT:
426                         layer++;
427                         break;
428                 case _CEND:
429                         layer--;
430                         break;
431                 }
432         }
433 }
434 /*-------------------------------------------------------*/
435 static void pars_2_message(_cmsg * cmsg)
436 {
437
438         for (; TYP != _CEND; cmsg->p++) {
439                 switch (TYP) {
440                 case _CBYTE:
441                         byteTLcpy(cmsg->m + cmsg->l, OFF);
442                         cmsg->l++;
443                         break;
444                 case _CWORD:
445                         wordTLcpy(cmsg->m + cmsg->l, OFF);
446                         cmsg->l += 2;
447                         break;
448                 case _CDWORD:
449                         dwordTLcpy(cmsg->m + cmsg->l, OFF);
450                         cmsg->l += 4;
451                         break;
452                 case _CSTRUCT:
453                         if (*(u8 **) OFF == NULL) {
454                                 *(cmsg->m + cmsg->l) = '\0';
455                                 cmsg->l++;
456                         } else if (**(_cstruct *) OFF != 0xff) {
457                                 structTLcpy(cmsg->m + cmsg->l, *(_cstruct *) OFF, 1 + **(_cstruct *) OFF);
458                                 cmsg->l += 1 + **(_cstruct *) OFF;
459                         } else {
460                                 _cstruct s = *(_cstruct *) OFF;
461                                 structTLcpy(cmsg->m + cmsg->l, s, 3 + *(u16 *) (s + 1));
462                                 cmsg->l += 3 + *(u16 *) (s + 1);
463                         }
464                         break;
465                 case _CMSTRUCT:
466 /*----- Metastruktur 0 -----*/
467                         if (*(_cmstruct *) OFF == CAPI_DEFAULT) {
468                                 *(cmsg->m + cmsg->l) = '\0';
469                                 cmsg->l++;
470                                 jumpcstruct(cmsg);
471                         }
472 /*----- Metastruktur wird composed -----*/
473                         else {
474                                 unsigned _l = cmsg->l;
475                                 unsigned _ls;
476                                 cmsg->l++;
477                                 cmsg->p++;
478                                 pars_2_message(cmsg);
479                                 _ls = cmsg->l - _l - 1;
480                                 if (_ls < 255)
481                                         (cmsg->m + _l)[0] = (u8) _ls;
482                                 else {
483                                         structTLcpyovl(cmsg->m + _l + 3, cmsg->m + _l + 1, _ls);
484                                         (cmsg->m + _l)[0] = 0xff;
485                                         wordTLcpy(cmsg->m + _l + 1, &_ls);
486                                 }
487                         }
488                         break;
489                 }
490         }
491 }
492
493 /**
494  * capi_cmsg2message() - assemble CAPI 2.0 message from _cmsg structure
495  * @cmsg:       _cmsg structure
496  * @msg:        buffer for assembled message
497  *
498  * Return value: 0 for success
499  */
500
501 unsigned capi_cmsg2message(_cmsg * cmsg, u8 * msg)
502 {
503         cmsg->m = msg;
504         cmsg->l = 8;
505         cmsg->p = 0;
506         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
507
508         pars_2_message(cmsg);
509
510         wordTLcpy(msg + 0, &cmsg->l);
511         byteTLcpy(cmsg->m + 4, &cmsg->Command);
512         byteTLcpy(cmsg->m + 5, &cmsg->Subcommand);
513         wordTLcpy(cmsg->m + 2, &cmsg->ApplId);
514         wordTLcpy(cmsg->m + 6, &cmsg->Messagenumber);
515
516         return 0;
517 }
518
519 /*-------------------------------------------------------*/
520 static void message_2_pars(_cmsg * cmsg)
521 {
522         for (; TYP != _CEND; cmsg->p++) {
523
524                 switch (TYP) {
525                 case _CBYTE:
526                         byteTRcpy(cmsg->m + cmsg->l, OFF);
527                         cmsg->l++;
528                         break;
529                 case _CWORD:
530                         wordTRcpy(cmsg->m + cmsg->l, OFF);
531                         cmsg->l += 2;
532                         break;
533                 case _CDWORD:
534                         dwordTRcpy(cmsg->m + cmsg->l, OFF);
535                         cmsg->l += 4;
536                         break;
537                 case _CSTRUCT:
538                         *(u8 **) OFF = cmsg->m + cmsg->l;
539
540                         if (cmsg->m[cmsg->l] != 0xff)
541                                 cmsg->l += 1 + cmsg->m[cmsg->l];
542                         else
543                                 cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
544                         break;
545                 case _CMSTRUCT:
546 /*----- Metastruktur 0 -----*/
547                         if (cmsg->m[cmsg->l] == '\0') {
548                                 *(_cmstruct *) OFF = CAPI_DEFAULT;
549                                 cmsg->l++;
550                                 jumpcstruct(cmsg);
551                         } else {
552                                 unsigned _l = cmsg->l;
553                                 *(_cmstruct *) OFF = CAPI_COMPOSE;
554                                 cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
555                                 cmsg->p++;
556                                 message_2_pars(cmsg);
557                         }
558                         break;
559                 }
560         }
561 }
562
563 /**
564  * capi_message2cmsg() - disassemble CAPI 2.0 message into _cmsg structure
565  * @cmsg:       _cmsg structure
566  * @msg:        buffer for assembled message
567  *
568  * Return value: 0 for success
569  */
570
571 unsigned capi_message2cmsg(_cmsg * cmsg, u8 * msg)
572 {
573         memset(cmsg, 0, sizeof(_cmsg));
574         cmsg->m = msg;
575         cmsg->l = 8;
576         cmsg->p = 0;
577         byteTRcpy(cmsg->m + 4, &cmsg->Command);
578         byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
579         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
580
581         message_2_pars(cmsg);
582
583         wordTRcpy(msg + 0, &cmsg->l);
584         wordTRcpy(cmsg->m + 2, &cmsg->ApplId);
585         wordTRcpy(cmsg->m + 6, &cmsg->Messagenumber);
586
587         return 0;
588 }
589
590 /**
591  * capi_cmsg_header() - initialize header part of _cmsg structure
592  * @cmsg:       _cmsg structure
593  * @_ApplId:    ApplID field value
594  * @_Command:   Command field value
595  * @_Subcommand:        Subcommand field value
596  * @_Messagenumber:     Message Number field value
597  * @_Controller:        Controller/PLCI/NCCI field value
598  *
599  * Return value: 0 for success
600  */
601
602 unsigned capi_cmsg_header(_cmsg * cmsg, u16 _ApplId,
603                           u8 _Command, u8 _Subcommand,
604                           u16 _Messagenumber, u32 _Controller)
605 {
606         memset(cmsg, 0, sizeof(_cmsg));
607         cmsg->ApplId = _ApplId;
608         cmsg->Command = _Command;
609         cmsg->Subcommand = _Subcommand;
610         cmsg->Messagenumber = _Messagenumber;
611         cmsg->adr.adrController = _Controller;
612         return 0;
613 }
614
615 /*-------------------------------------------------------*/
616
617 static char *mnames[] =
618 {
619         [0x01] = "ALERT_REQ",
620         [0x02] = "CONNECT_REQ",
621         [0x04] = "DISCONNECT_REQ",
622         [0x05] = "LISTEN_REQ",
623         [0x08] = "INFO_REQ",
624         [0x09] = "FACILITY_REQ",
625         [0x0a] = "SELECT_B_PROTOCOL_REQ",
626         [0x0b] = "CONNECT_B3_REQ",
627         [0x0d] = "DISCONNECT_B3_REQ",
628         [0x0f] = "DATA_B3_REQ",
629         [0x10] = "RESET_B3_REQ",
630         [0x13] = "ALERT_CONF",
631         [0x14] = "CONNECT_CONF",
632         [0x16] = "DISCONNECT_CONF",
633         [0x17] = "LISTEN_CONF",
634         [0x18] = "MANUFACTURER_REQ",
635         [0x1a] = "INFO_CONF",
636         [0x1b] = "FACILITY_CONF",
637         [0x1c] = "SELECT_B_PROTOCOL_CONF",
638         [0x1d] = "CONNECT_B3_CONF",
639         [0x1f] = "DISCONNECT_B3_CONF",
640         [0x21] = "DATA_B3_CONF",
641         [0x22] = "RESET_B3_CONF",
642         [0x26] = "CONNECT_IND",
643         [0x27] = "CONNECT_ACTIVE_IND",
644         [0x28] = "DISCONNECT_IND",
645         [0x2a] = "MANUFACTURER_CONF",
646         [0x2c] = "INFO_IND",
647         [0x2d] = "FACILITY_IND",
648         [0x2f] = "CONNECT_B3_IND",
649         [0x30] = "CONNECT_B3_ACTIVE_IND",
650         [0x31] = "DISCONNECT_B3_IND",
651         [0x33] = "DATA_B3_IND",
652         [0x34] = "RESET_B3_IND",
653         [0x35] = "CONNECT_B3_T90_ACTIVE_IND",
654         [0x38] = "CONNECT_RESP",
655         [0x39] = "CONNECT_ACTIVE_RESP",
656         [0x3a] = "DISCONNECT_RESP",
657         [0x3c] = "MANUFACTURER_IND",
658         [0x3e] = "INFO_RESP",
659         [0x3f] = "FACILITY_RESP",
660         [0x41] = "CONNECT_B3_RESP",
661         [0x42] = "CONNECT_B3_ACTIVE_RESP",
662         [0x43] = "DISCONNECT_B3_RESP",
663         [0x45] = "DATA_B3_RESP",
664         [0x46] = "RESET_B3_RESP",
665         [0x47] = "CONNECT_B3_T90_ACTIVE_RESP",
666         [0x4e] = "MANUFACTURER_RESP"
667 };
668
669 /**
670  * capi_cmd2str() - convert CAPI 2.0 command/subcommand number to name
671  * @cmd:        command number
672  * @subcmd:     subcommand number
673  *
674  * Return value: static string, NULL if command/subcommand unknown
675  */
676
677 char *capi_cmd2str(u8 cmd, u8 subcmd)
678 {
679         return mnames[command_2_index(cmd, subcmd)];
680 }
681
682
683 /*-------------------------------------------------------*/
684
685 #ifdef CONFIG_CAPI_TRACE
686
687 /*-------------------------------------------------------*/
688
689 static char *pnames[] =
690 {
691     /*00 */ NULL,
692     /*01 */ NULL,
693     /*02 */ NULL,
694     /*03 */ "Controller/PLCI/NCCI",
695     /*04 */ "AdditionalInfo",
696     /*05 */ "B1configuration",
697     /*06 */ "B1protocol",
698     /*07 */ "B2configuration",
699     /*08 */ "B2protocol",
700     /*09 */ "B3configuration",
701     /*0a */ "B3protocol",
702     /*0b */ "BC",
703     /*0c */ "BChannelinformation",
704     /*0d */ "BProtocol",
705     /*0e */ "CalledPartyNumber",
706     /*0f */ "CalledPartySubaddress",
707     /*10 */ "CallingPartyNumber",
708     /*11 */ "CallingPartySubaddress",
709     /*12 */ "CIPmask",
710     /*13 */ "CIPmask2",
711     /*14 */ "CIPValue",
712     /*15 */ "Class",
713     /*16 */ "ConnectedNumber",
714     /*17 */ "ConnectedSubaddress",
715     /*18 */ "Data32",
716     /*19 */ "DataHandle",
717     /*1a */ "DataLength",
718     /*1b */ "FacilityConfirmationParameter",
719     /*1c */ "Facilitydataarray",
720     /*1d */ "FacilityIndicationParameter",
721     /*1e */ "FacilityRequestParameter",
722     /*1f */ "FacilitySelector",
723     /*20 */ "Flags",
724     /*21 */ "Function",
725     /*22 */ "HLC",
726     /*23 */ "Info",
727     /*24 */ "InfoElement",
728     /*25 */ "InfoMask",
729     /*26 */ "InfoNumber",
730     /*27 */ "Keypadfacility",
731     /*28 */ "LLC",
732     /*29 */ "ManuData",
733     /*2a */ "ManuID",
734     /*2b */ "NCPI",
735     /*2c */ "Reason",
736     /*2d */ "Reason_B3",
737     /*2e */ "Reject",
738     /*2f */ "Useruserdata"
739 };
740
741
742
743 #include <stdarg.h>
744
745 /*-------------------------------------------------------*/
746 static _cdebbuf *bufprint(_cdebbuf *cdb, char *fmt,...)
747 {
748         va_list f;
749         size_t n,r;
750
751         if (!cdb)
752                 return NULL;
753         va_start(f, fmt);
754         r = cdb->size - cdb->pos;
755         n = vsnprintf(cdb->p, r, fmt, f);
756         va_end(f);
757         if (n >= r) {
758                 /* truncated, need bigger buffer */
759                 size_t ns = 2 * cdb->size;
760                 u_char *nb;
761
762                 while ((ns - cdb->pos) <= n)
763                         ns *= 2;
764                 nb = kmalloc(ns, GFP_ATOMIC);
765                 if (!nb) {
766                         cdebbuf_free(cdb);
767                         return NULL;
768                 }
769                 memcpy(nb, cdb->buf, cdb->pos);
770                 kfree(cdb->buf);
771                 nb[cdb->pos] = 0;
772                 cdb->buf = nb;
773                 cdb->p = cdb->buf + cdb->pos;
774                 cdb->size = ns;
775                 va_start(f, fmt);
776                 r = cdb->size - cdb->pos;
777                 n = vsnprintf(cdb->p, r, fmt, f);
778                 va_end(f);
779         }
780         cdb->p += n;
781         cdb->pos += n;
782         return cdb;
783 }
784
785 static _cdebbuf *printstructlen(_cdebbuf *cdb, u8 * m, unsigned len)
786 {
787         unsigned hex = 0;
788
789         if (!cdb)
790                 return NULL;
791         for (; len; len--, m++)
792                 if (isalnum(*m) || *m == ' ') {
793                         if (hex)
794                                 cdb = bufprint(cdb, ">");
795                         cdb = bufprint(cdb, "%c", *m);
796                         hex = 0;
797                 } else {
798                         if (!hex)
799                                 cdb = bufprint(cdb, "<%02x", *m);
800                         else
801                                 cdb = bufprint(cdb, " %02x", *m);
802                         hex = 1;
803                 }
804         if (hex)
805                 cdb = bufprint(cdb, ">");
806         return cdb;
807 }
808
809 static _cdebbuf *printstruct(_cdebbuf *cdb, u8 * m)
810 {
811         unsigned len;
812
813         if (m[0] != 0xff) {
814                 len = m[0];
815                 m += 1;
816         } else {
817                 len = ((u16 *) (m + 1))[0];
818                 m += 3;
819         }
820         cdb = printstructlen(cdb, m, len);
821         return cdb;
822 }
823
824 /*-------------------------------------------------------*/
825 #define NAME (pnames[cmsg->par[cmsg->p]])
826
827 static _cdebbuf *protocol_message_2_pars(_cdebbuf *cdb, _cmsg *cmsg, int level)
828 {
829         for (; TYP != _CEND; cmsg->p++) {
830                 int slen = 29 + 3 - level;
831                 int i;
832
833                 if (!cdb)
834                         return NULL;
835                 cdb = bufprint(cdb, "  ");
836                 for (i = 0; i < level - 1; i++)
837                         cdb = bufprint(cdb, " ");
838
839                 switch (TYP) {
840                 case _CBYTE:
841                         cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u8 *) (cmsg->m + cmsg->l));
842                         cmsg->l++;
843                         break;
844                 case _CWORD:
845                         cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u16 *) (cmsg->m + cmsg->l));
846                         cmsg->l += 2;
847                         break;
848                 case _CDWORD:
849                         cdb = bufprint(cdb, "%-*s = 0x%lx\n", slen, NAME, *(u32 *) (cmsg->m + cmsg->l));
850                         cmsg->l += 4;
851                         break;
852                 case _CSTRUCT:
853                         cdb = bufprint(cdb, "%-*s = ", slen, NAME);
854                         if (cmsg->m[cmsg->l] == '\0')
855                                 cdb = bufprint(cdb, "default");
856                         else
857                                 cdb = printstruct(cdb, cmsg->m + cmsg->l);
858                         cdb = bufprint(cdb, "\n");
859                         if (cmsg->m[cmsg->l] != 0xff)
860                                 cmsg->l += 1 + cmsg->m[cmsg->l];
861                         else
862                                 cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
863
864                         break;
865
866                 case _CMSTRUCT:
867 /*----- Metastruktur 0 -----*/
868                         if (cmsg->m[cmsg->l] == '\0') {
869                                 cdb = bufprint(cdb, "%-*s = default\n", slen, NAME);
870                                 cmsg->l++;
871                                 jumpcstruct(cmsg);
872                         } else {
873                                 char *name = NAME;
874                                 unsigned _l = cmsg->l;
875                                 cdb = bufprint(cdb, "%-*s\n", slen, name);
876                                 cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
877                                 cmsg->p++;
878                                 cdb = protocol_message_2_pars(cdb, cmsg, level + 1);
879                         }
880                         break;
881                 }
882         }
883         return cdb;
884 }
885 /*-------------------------------------------------------*/
886
887 static _cdebbuf *g_debbuf;
888 static u_long g_debbuf_lock;
889 static _cmsg *g_cmsg;
890
891 static _cdebbuf *cdebbuf_alloc(void)
892 {
893         _cdebbuf *cdb;
894
895         if (likely(!test_and_set_bit(1, &g_debbuf_lock))) {
896                 cdb = g_debbuf;
897                 goto init;
898         } else
899                 cdb = kmalloc(sizeof(_cdebbuf), GFP_ATOMIC);
900         if (!cdb)
901                 return NULL;
902         cdb->buf = kmalloc(CDEBUG_SIZE, GFP_ATOMIC);
903         if (!cdb->buf) {
904                 kfree(cdb);
905                 return NULL;
906         }
907         cdb->size = CDEBUG_SIZE;
908 init:
909         cdb->buf[0] = 0;
910         cdb->p = cdb->buf;
911         cdb->pos = 0;
912         return cdb;
913 }
914
915 /**
916  * cdebbuf_free() - free CAPI debug buffer
917  * @cdb:        buffer to free
918  */
919
920 void cdebbuf_free(_cdebbuf *cdb)
921 {
922         if (likely(cdb == g_debbuf)) {
923                 test_and_clear_bit(1, &g_debbuf_lock);
924                 return;
925         }
926         if (likely(cdb))
927                 kfree(cdb->buf);
928         kfree(cdb);
929 }
930
931
932 /**
933  * capi_message2str() - format CAPI 2.0 message for printing
934  * @msg:        CAPI 2.0 message
935  *
936  * Allocates a CAPI debug buffer and fills it with a printable representation
937  * of the CAPI 2.0 message in @msg.
938  * Return value: allocated debug buffer, NULL on error
939  * The returned buffer should be freed by a call to cdebbuf_free() after use.
940  */
941
942 _cdebbuf *capi_message2str(u8 * msg)
943 {
944         _cdebbuf *cdb;
945         _cmsg   *cmsg;
946
947         cdb = cdebbuf_alloc();
948         if (unlikely(!cdb))
949                 return NULL;
950         if (likely(cdb == g_debbuf))
951                 cmsg = g_cmsg;
952         else
953                 cmsg = kmalloc(sizeof(_cmsg), GFP_ATOMIC);
954         if (unlikely(!cmsg)) {
955                 cdebbuf_free(cdb);
956                 return NULL;
957         }
958         cmsg->m = msg;
959         cmsg->l = 8;
960         cmsg->p = 0;
961         byteTRcpy(cmsg->m + 4, &cmsg->Command);
962         byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
963         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
964
965         cdb = bufprint(cdb, "%-26s ID=%03d #0x%04x LEN=%04d\n",
966                  mnames[command_2_index(cmsg->Command, cmsg->Subcommand)],
967                  ((unsigned short *) msg)[1],
968                  ((unsigned short *) msg)[3],
969                  ((unsigned short *) msg)[0]);
970
971         cdb = protocol_message_2_pars(cdb, cmsg, 1);
972         if (unlikely(cmsg != g_cmsg))
973                 kfree(cmsg);
974         return cdb;
975 }
976
977 /**
978  * capi_cmsg2str() - format _cmsg structure for printing
979  * @cmsg:       _cmsg structure
980  *
981  * Allocates a CAPI debug buffer and fills it with a printable representation
982  * of the CAPI 2.0 message stored in @cmsg by a previous call to
983  * capi_cmsg2message() or capi_message2cmsg().
984  * Return value: allocated debug buffer, NULL on error
985  * The returned buffer should be freed by a call to cdebbuf_free() after use.
986  */
987
988 _cdebbuf *capi_cmsg2str(_cmsg * cmsg)
989 {
990         _cdebbuf *cdb;
991
992         if (!cmsg->m)
993                 return NULL;    /* no message */
994         cdb = cdebbuf_alloc();
995         if (!cdb)
996                 return NULL;
997         cmsg->l = 8;
998         cmsg->p = 0;
999         cdb = bufprint(cdb, "%s ID=%03d #0x%04x LEN=%04d\n",
1000                  mnames[command_2_index(cmsg->Command, cmsg->Subcommand)],
1001                  ((u16 *) cmsg->m)[1],
1002                  ((u16 *) cmsg->m)[3],
1003                  ((u16 *) cmsg->m)[0]);
1004         cdb = protocol_message_2_pars(cdb, cmsg, 1);
1005         return cdb;
1006 }
1007
1008 int __init cdebug_init(void)
1009 {
1010         g_cmsg= kmalloc(sizeof(_cmsg), GFP_KERNEL);
1011         if (!g_cmsg)
1012                 return -ENOMEM;
1013         g_debbuf = kmalloc(sizeof(_cdebbuf), GFP_KERNEL);
1014         if (!g_debbuf) {
1015                 kfree(g_cmsg);
1016                 return -ENOMEM;
1017         }
1018         g_debbuf->buf = kmalloc(CDEBUG_GSIZE, GFP_KERNEL);
1019         if (!g_debbuf->buf) {
1020                 kfree(g_cmsg);
1021                 kfree(g_debbuf);
1022                 return -ENOMEM;;
1023         }
1024         g_debbuf->size = CDEBUG_GSIZE;
1025         g_debbuf->buf[0] = 0;
1026         g_debbuf->p = g_debbuf->buf;
1027         g_debbuf->pos = 0;
1028         return 0;
1029 }
1030
1031 void __exit cdebug_exit(void)
1032 {
1033         if (g_debbuf)
1034                 kfree(g_debbuf->buf);
1035         kfree(g_debbuf);
1036         kfree(g_cmsg);
1037 }
1038
1039 #else /* !CONFIG_CAPI_TRACE */
1040
1041 static _cdebbuf g_debbuf = {"CONFIG_CAPI_TRACE not enabled", NULL, 0, 0};
1042
1043 _cdebbuf *capi_message2str(u8 * msg)
1044 {
1045         return &g_debbuf;
1046 }
1047
1048 _cdebbuf *capi_cmsg2str(_cmsg * cmsg)
1049 {
1050         return &g_debbuf;
1051 }
1052
1053 void cdebbuf_free(_cdebbuf *cdb)
1054 {
1055 }
1056
1057 int __init cdebug_init(void)
1058 {
1059         return 0;
1060 }
1061
1062 void __exit cdebug_exit(void)
1063 {
1064 }
1065
1066 #endif
1067
1068 EXPORT_SYMBOL(cdebbuf_free);
1069 EXPORT_SYMBOL(capi_cmsg2message);
1070 EXPORT_SYMBOL(capi_message2cmsg);
1071 EXPORT_SYMBOL(capi_cmsg_header);
1072 EXPORT_SYMBOL(capi_cmd2str);
1073 EXPORT_SYMBOL(capi_cmsg2str);
1074 EXPORT_SYMBOL(capi_message2str);
1075 EXPORT_SYMBOL(capi_info2str);