aboutsummaryrefslogtreecommitdiff
path: root/drivers/isdn/capi/capiutil.c
blob: 03c469e4451feae3102f96994420ebfddd1223ce (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
/* $Id: capiutil.c,v 1.13.6.4 2001/09/23 22:24:33 kai Exp $
 *
 * CAPI 2.0 convert capi message to capi message struct
 *
 * From CAPI 2.0 Development Kit AVM 1995 (msg.c)
 * Rewritten for Linux 1996 by Carsten Paeth <calle@calle.de>
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 */

#include <linux/module.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/isdn/capiutil.h>
#include <linux/slab.h>

/* from CAPI2.0 DDK AVM Berlin GmbH */

#ifndef CONFIG_ISDN_DRV_AVMB1_VERBOSE_REASON
char *capi_info2str(u16 reason)
{
    return "..";
}
#else
char *capi_info2str(u16 reason)
{
    switch (reason) {

/*-- informative values (corresponding message was processed) -----*/
	case 0x0001:
	   return "NCPI not supported by current protocol, NCPI ignored";
	case 0x0002:
	   return "Flags not supported by current protocol, flags ignored";
	case 0x0003:
	   return "Alert already sent by another application";

/*-- error information concerning CAPI_REGISTER -----*/
	case 0x1001:
	   return "Too many applications";
	case 0x1002:
	   return "Logical block size too small, must be at least 128 Bytes";
	case 0x1003:
	   return "Buffer exceeds 64 kByte";
	case 0x1004:
	   return "Message buffer size too small, must be at least 1024 Bytes";
	case 0x1005:
	   return "Max. number of logical connections not supported";
	case 0x1006:
	   return "Reserved";
	case 0x1007:
	   return "The message could not be accepted because of an internal busy condition";
	case 0x1008:
	   return "OS resource error (no memory ?)";
	case 0x1009:
	   return "CAPI not installed";
	case 0x100A:
	   return "Controller does not support external equipment";
	case 0x100B:
	   return "Controller does only support external equipment";

/*-- error information concerning message exchange functions -----*/
	case 0x1101:
	   return "Illegal application number";
	case 0x1102:
	   return "Illegal command or subcommand or message length less than 12 bytes";
	case 0x1103:
	   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";
	case 0x1104:
	   return "Queue is empty";
	case 0x1105:
	   return "Queue overflow, a message was lost !! This indicates a configuration error. The only recovery from this error is to perform a CAPI_RELEASE";
	case 0x1106:
	   return "Unknown notification parameter";
	case 0x1107:
	   return "The Message could not be accepted because of an internal busy condition";
	case 0x1108:
	   return "OS Resource error (no memory ?)";
	case 0x1109:
	   return "CAPI not installed";
	case 0x110A:
	   return "Controller does not support external equipment";
	case 0x110B:
	   return "Controller does only support external equipment";

/*-- error information concerning resource / coding problems -----*/
	case 0x2001:
	   return "Message not supported in current state";
	case 0x2002:
	   return "Illegal Controller / PLCI / NCCI";
	case 0x2003:
	   return "Out of PLCI";
	case 0x2004:
	   return "Out of NCCI";
	case 0x2005:
	   return "Out of LISTEN";
	case 0x2006:
	   return "Out of FAX resources (protocol T.30)";
	case 0x2007:
	   return "Illegal message parameter coding";

/*-- error information concerning requested services  -----*/
	case 0x3001:
	   return "B1 protocol not supported";
	case 0x3002: 
	   return "B2 protocol not supported";
	case 0x3003: 
	   return "B3 protocol not supported";
	case 0x3004: 
	   return "B1 protocol parameter not supported";
	case 0x3005: 
	   return "B2 protocol parameter not supported";
	case 0x3006: 
	   return "B3 protocol parameter not supported";
	case 0x3007: 
	   return "B protocol combination not supported";
	case 0x3008: 
	   return "NCPI not supported";
	case 0x3009: 
	   return "CIP Value unknown";
	case 0x300A: 
	   return "Flags not supported (reserved bits)";
	case 0x300B: 
	   return "Facility not supported";
	case 0x300C: 
	   return "Data length not supported by current protocol";
	case 0x300D: 
	   return "Reset procedure not supported by current protocol";

/*-- informations about the clearing of a physical connection -----*/
	case 0x3301: 
	   return "Protocol error layer 1 (broken line or B-channel removed by signalling protocol)";
	case 0x3302: 
	   return "Protocol error layer 2";
	case 0x3303: 
	   return "Protocol error layer 3";
	case 0x3304: 
	   return "Another application got that call";
/*-- T.30 specific reasons -----*/
	case 0x3311: 
	   return "Connecting not successful (remote station is no FAX G3 machine)";
	case 0x3312: 
	   return "Connecting not successful (training error)";
	case 0x3313: 
	   return "Disconnected before transfer (remote station does not support transfer mode, e.g. resolution)";
	case 0x3314: 
	   return "Disconnected during transfer (remote abort)";
	case 0x3315: 
	   return "Disconnected during transfer (remote procedure error, e.g. unsuccessful repetition of T.30 commands)";
	case 0x3316: 
	   return "Disconnected during transfer (local tx data underrun)";
	case 0x3317: 
	   return "Disconnected during transfer (local rx data overflow)";
	case 0x3318: 
	   return "Disconnected during transfer (local abort)";
	case 0x3319: 
	   return "Illegal parameter coding (e.g. SFF coding error)";

/*-- disconnect causes from the network according to ETS 300 102-1/Q.931 -----*/
	case 0x3481: return "Unallocated (unassigned) number";
	case 0x3482: return "No route to specified transit network";
	case 0x3483: return "No route to destination";
	case 0x3486: return "Channel unacceptable";
	case 0x3487: 
	   return "Call awarded and being delivered in an established channel";
	case 0x3490: return "Normal call clearing";
	case 0x3491: return "User busy";
	case 0x3492: return "No user responding";
	case 0x3493: return "No answer from user (user alerted)";
	case 0x3495: return "Call rejected";
	case 0x3496: return "Number changed";
	case 0x349A: return "Non-selected user clearing";
	case 0x349B: return "Destination out of order";
	case 0x349C: return "Invalid number format";
	case 0x349D: return "Facility rejected";
	case 0x349E: return "Response to STATUS ENQUIRY";
	case 0x349F: return "Normal, unspecified";
	case 0x34A2: return "No circuit / channel available";
	case 0x34A6: return "Network out of order";
	case 0x34A9: return "Temporary failure";
	case 0x34AA: return "Switching equipment congestion";
	case 0x34AB: return "Access information discarded";
	case 0x34AC: return "Requested circuit / channel not available";
	case 0x34AF: return "Resources unavailable, unspecified";
	case 0x34B1: return "Quality of service unavailable";
	case 0x34B2: return "Requested facility not subscribed";
	case 0x34B9: return "Bearer capability not authorized";
	case 0x34BA: return "Bearer capability not presently available";
	case 0x34BF: return "Service or option not available, unspecified";
	case 0x34C1: return "Bearer capability not implemented";
	case 0x34C2: return "Channel type not implemented";
	case 0x34C5: return "Requested facility not implemented";
	case 0x34C6: return "Only restricted digital information bearer capability is available";
	case 0x34CF: return "Service or option not implemented, unspecified";
	case 0x34D1: return "Invalid call reference value";
	case 0x34D2: return "Identified channel does not exist";
	case 0x34D3: return "A suspended call exists, but this call identity does not";
	case 0x34D4: return "Call identity in use";
	case 0x34D5: return "No call suspended";
	case 0x34D6: return "Call having the requested call identity has been cleared";
	case 0x34D8: return "Incompatible destination";
	case 0x34DB: return "Invalid transit network selection";
	case 0x34DF: return "Invalid message, unspecified";
	case 0x34E0: return "Mandatory information element is missing";
	case 0x34E1: return "Message type non-existent or not implemented";
	case 0x34E2: return "Message not compatible with call state or message type non-existent or not implemented";
	case 0x34E3: return "Information element non-existent or not implemented";
	case 0x34E4: return "Invalid information element contents";
	case 0x34E5: return "Message not compatible with call state";
	case 0x34E6: return "Recovery on timer expiry";
	case 0x34EF: return "Protocol error, unspecified";
	case 0x34FF: return "Interworking, unspecified";

	default: return "No additional information";
    }
}
#endif

typedef struct {
	int typ;
	size_t off;
} _cdef;

#define _CBYTE	       1
#define _CWORD	       2
#define _CDWORD        3
#define _CSTRUCT       4
#define _CMSTRUCT      5
#define _CEND	       6

static _cdef cdef[] =
{
    /*00 */ 
 {_CEND},
    /*01 */ 
 {_CEND},
    /*02 */ 
 {_CEND},
    /*03 */ 
 {_CDWORD, offsetof(_cmsg, adr.adrController)},
    /*04 */ 
 {_CMSTRUCT, offsetof(_cmsg, AdditionalInfo)},
    /*05 */ 
 {_CSTRUCT, offsetof(_cmsg, B1configuration)},
    /*06 */ 
 {_CWORD, offsetof(_cmsg, B1protocol)},
    /*07 */ 
 {_CSTRUCT, offsetof(_cmsg, B2configuration)},
    /*08 */ 
 {_CWORD, offsetof(_cmsg, B2protocol)},
    /*09 */ 
 {_CSTRUCT, offsetof(_cmsg, B3configuration)},
    /*0a */ 
 {_CWORD, offsetof(_cmsg, B3protocol)},
    /*0b */ 
 {_CSTRUCT, offsetof(_cmsg, BC)},
    /*0c */ 
 {_CSTRUCT, offsetof(_cmsg, BChannelinformation)},
    /*0d */ 
 {_CMSTRUCT, offsetof(_cmsg, BProtocol)},
    /*0e */ 
 {_CSTRUCT, offsetof(_cmsg, CalledPartyNumber)},
    /*0f */ 
 {_CSTRUCT, offsetof(_cmsg, CalledPartySubaddress)},
    /*10 */ 
 {_CSTRUCT, offsetof(_cmsg, CallingPartyNumber)},
    /*11 */ 
 {_CSTRUCT, offsetof(_cmsg, CallingPartySubaddress)},
    /*12 */ 
 {_CDWORD, offsetof(_cmsg, CIPmask)},
    /*13 */ 
 {_CDWORD, offsetof(_cmsg, CIPmask2)},
    /*14 */ 
 {_CWORD, offsetof(_cmsg, CIPValue)},
    /*15 */ 
 {_CDWORD, offsetof(_cmsg, Class)},
    /*16 */ 
 {_CSTRUCT, offsetof(_cmsg, ConnectedNumber)},
    /*17 */ 
 {_CSTRUCT, offsetof(_cmsg, ConnectedSubaddress)},
    /*18 */ 
 {_CDWORD, offsetof(_cmsg, Data)},
    /*19 */ 
 {_CWORD, offsetof(_cmsg, DataHandle)},
    /*1a */ 
 {_CWORD, offsetof(_cmsg, DataLength)},
    /*1b */ 
 {_CSTRUCT, offsetof(_cmsg, FacilityConfirmationParameter)},
    /*1c */ 
 {_CSTRUCT, offsetof(_cmsg, Facilitydataarray)},
    /*1d */ 
 {_CSTRUCT, offsetof(_cmsg, FacilityIndicationParameter)},
    /*1e */ 
 {_CSTRUCT, offsetof(_cmsg, FacilityRequestParameter)},
    /*1f */ 
 {_CWORD, offsetof(_cmsg, FacilitySelector)},
    /*20 */ 
 {_CWORD, offsetof(_cmsg, Flags)},
    /*21 */ 
 {_CDWORD, offsetof(_cmsg, Function)},
    /*22 */ 
 {_CSTRUCT, offsetof(_cmsg, HLC)},
    /*23 */ 
 {_CWORD, offsetof(_cmsg, Info)},
    /*24 */ 
 {_CSTRUCT, offsetof(_cmsg, InfoElement)},
    /*25 */ 
 {_CDWORD, offsetof(_cmsg, InfoMask)},
    /*26 */ 
 {_CWORD, offsetof(_cmsg, InfoNumber)},
    /*27 */ 
 {_CSTRUCT, offsetof(_cmsg, Keypadfacility)},
    /*28 */ 
 {_CSTRUCT, offsetof(_cmsg, LLC)},
    /*29 */ 
 {_CSTRUCT, offsetof(_cmsg, ManuData)},
    /*2a */ 
 {_CDWORD, offsetof(_cmsg, ManuID)},
    /*2b */ 
 {_CSTRUCT, offsetof(_cmsg, NCPI)},
    /*2c */ 
 {_CWORD, offsetof(_cmsg, Reason)},
    /*2d */ 
 {_CWORD, offsetof(_cmsg, Reason_B3)},
    /*2e */ 
 {_CWORD, offsetof(_cmsg, Reject)},
    /*2f */ 
 {_CSTRUCT, offsetof(_cmsg, Useruserdata)}
};

static unsigned char *cpars[] =
{
    /* ALERT_REQ */ [0x01] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
    /* 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",
    /* DISCONNECT_REQ */ [0x04] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
    /* LISTEN_REQ */ [0x05] = "\x03\x25\x12\x13\x10\x11\x01",
    /* INFO_REQ */ [0x08] = "\x03\x0e\x04\x0c\x27\x2f\x1c\x01\x01",
    /* FACILITY_REQ */ [0x09] = "\x03\x1f\x1e\x01",
    /* SELECT_B_PROTOCOL_REQ */ [0x0a] = "\x03\x0d\x06\x08\x0a\x05\x07\x09\x01\x01",
    /* CONNECT_B3_REQ */ [0x0b] = "\x03\x2b\x01",
    /* DISCONNECT_B3_REQ */ [0x0d] = "\x03\x2b\x01",
    /* DATA_B3_REQ */ [0x0f] = "\x03\x18\x1a\x19\x20\x01",
    /* RESET_B3_REQ */ [0x10] = "\x03\x2b\x01",
    /* ALERT_CONF */ [0x13] = "\x03\x23\x01",
    /* CONNECT_CONF */ [0x14] = "\x03\x23\x01",
    /* DISCONNECT_CONF */ [0x16] = "\x03\x23\x01",
    /* LISTEN_CONF */ [0x17] = "\x03\x23\x01",
    /* MANUFACTURER_REQ */ [0x18] = "\x03\x2a\x15\x21\x29\x01",
    /* INFO_CONF */ [0x1a] = "\x03\x23\x01",
    /* FACILITY_CONF */ [0x1b] = "\x03\x23\x1f\x1b\x01",
    /* SELECT_B_PROTOCOL_CONF */ [0x1c] = "\x03\x23\x01",
    /* CONNECT_B3_CONF */ [0x1d] = "\x03\x23\x01",
    /* DISCONNECT_B3_CONF */ [0x1f] = "\x03\x23\x01",
    /* DATA_B3_CONF */ [0x21] = "\x03\x19\x23\x01",
    /* RESET_B3_CONF */ [0x22] = "\x03\x23\x01",
    /* CONNECT_IND */ [0x26] = "\x03\x14\x0e\x10\x0f\x11\x0b\x28\x22\x04\x0c\x27\x2f\x1c\x01\x01",
    /* CONNECT_ACTIVE_IND */ [0x27] = "\x03\x16\x17\x28\x01",
    /* DISCONNECT_IND */ [0x28] = "\x03\x2c\x01",
    /* MANUFACTURER_CONF */ [0x2a] = "\x03\x2a\x15\x21\x29\x01",
    /* INFO_IND */ [0x2c] = "\x03\x26\x24\x01",
    /* FACILITY_IND */ [0x2d] = "\x03\x1f\x1d\x01",
    /* CONNECT_B3_IND */ [0x2f] = "\x03\x2b\x01",
    /* CONNECT_B3_ACTIVE_IND */ [0x30] = "\x03\x2b\x01",
    /* DISCONNECT_B3_IND */ [0x31] = "\x03\x2d\x2b\x01",
    /* DATA_B3_IND */ [0x33] = "\x03\x18\x1a\x19\x20\x01",
    /* RESET_B3_IND */ [0x34] = "\x03\x2b\x01",
    /* CONNECT_B3_T90_ACTIVE_IND */ [0x35] = "\x03\x2b\x01",
    /* CONNECT_RESP */ [0x38] = "\x03\x2e\x0d\x06\x08\x0a\x05\x07\x09\x01\x16\x17\x28\x04\x0c\x27\x2f\x1c\x01\x01",
    /* CONNECT_ACTIVE_RESP */ [0x39] = "\x03\x01",
    /* DISCONNECT_RESP */ [0x3a] = "\x03\x01",
    /* MANUFACTURER_IND */ [0x3c] = "\x03\x2a\x15\x21\x29\x01",
    /* INFO_RESP */ [0x3e] = "\x03\x01",
    /* FACILITY_RESP */ [0x3f] = "\x03\x1f\x01",
    /* CONNECT_B3_RESP */ [0x41] = "\x03\x2e\x2b\x01",
    /* CONNECT_B3_ACTIVE_RESP */ [0x42] = "\x03\x01",
    /* DISCONNECT_B3_RESP */ [0x43] = "\x03\x01",
    /* DATA_B3_RESP */ [0x45] = "\x03\x19\x01",
    /* RESET_B3_RESP */ [0x46] = "\x03\x01",
    /* CONNECT_B3_T90_ACTIVE_RESP */ [0x47] = "\x03\x01",
    /* MANUFACTURER_RESP */ [0x4e] = "\x03\x2a\x15\x21\x29\x01",
};

/*-------------------------------------------------------*/

#define byteTLcpy(x,y)        *(u8 *)(x)=*(u8 *)(y);
#define wordTLcpy(x,y)        *(u16 *)(x)=*(u16 *)(y);
#define dwordTLcpy(x,y)       memcpy(x,y,4);
#define structTLcpy(x,y,l)    memcpy (x,y,l)
#define structTLcpyovl(x,y,l) memmove (x,y,l)

#define byteTRcpy(x,y)        *(u8 *)(y)=*(u8 *)(x);
#define wordTRcpy(x,y)        *(u16 *)(y)=*(u16 *)(x);
#define dwordTRcpy(x,y)       memcpy(y,x,4);
#define structTRcpy(x,y,l)    memcpy (y,x,l)
#define structTRcpyovl(x,y,l) memmove (y,x,l)

/*-------------------------------------------------------*/
static unsigned command_2_index(unsigned c, unsigned sc)
{
	if (c & 0x80)
		c = 0x9 + (c & 0x0f);
	else if (c <= 0x0f);
	else if (c == 0x41)
		c = 0x9 + 0x1;
	else if (c == 0xff)
		c = 0x00;
	return (sc & 3) * (0x9 + 0x9) + c;
}

/*-------------------------------------------------------*/
#define TYP (cdef[cmsg->par[cmsg->p]].typ)
#define OFF (((u8 *)cmsg)+cdef[cmsg->par[cmsg->p]].off)

static void jumpcstruct(_cmsg * cmsg)
{
	unsigned layer;
	for (cmsg->p++, layer = 1; layer;) {
		/* $$$$$ assert (cmsg->p); */
		cmsg->p++;
		switch (TYP) {
		case _CMSTRUCT:
			layer++;
			break;
		case _CEND:
			layer--;
			break;
		}
	}
}
/*-------------------------------------------------------*/
static void pars_2_message(_cmsg * cmsg)
{

	for (; TYP != _CEND; cmsg->p++) {
		switch (TYP) {
		case _CBYTE:
			byteTLcpy(cmsg->m + cmsg->l, OFF);
			cmsg->l++;
			break;
		case _CWORD:
			wordTLcpy(cmsg->m + cmsg->l, OFF);
			cmsg->l += 2;
			break;
		case _CDWORD:
			dwordTLcpy(cmsg->m + cmsg->l, OFF);
			cmsg->l += 4;
			break;
		case _CSTRUCT:
			if (*(u8 **) OFF == NULL) {
				*(cmsg->m + cmsg->l) = '\0';
				cmsg->l++;
			} else if (**(_cstruct *) OFF != 0xff) {
				structTLcpy(cmsg->m + cmsg->l, *(_cstruct *) OFF, 1 + **(_cstruct *) OFF);
				cmsg->l += 1 + **(_cstruct *) OFF;
			} else {
				_cstruct s = *(_cstruct *) OFF;
				structTLcpy(cmsg->m + cmsg->l, s, 3 + *(u16 *) (s + 1));
				cmsg->l += 3 + *(u16 *) (s + 1);
			}
			break;
		case _CMSTRUCT:
/*----- Metastruktur 0 -----*/
			if (*(_cmstruct *) OFF == CAPI_DEFAULT) {
				*(cmsg->m + cmsg->l) = '\0';
				cmsg->l++;
				jumpcstruct(cmsg);
			}
/*----- Metastruktur wird composed -----*/
			else {
				unsigned _l = cmsg->l;
				unsigned _ls;
				cmsg->l++;
				cmsg->p++;
				pars_2_message(cmsg);
				_ls = cmsg->l - _l - 1;
				if (_ls < 255)
					(cmsg->m + _l)[0] = (u8) _ls;
				else {
					structTLcpyovl(cmsg->m + _l + 3, cmsg->m + _l + 1, _ls);
					(cmsg->m + _l)[0] = 0xff;
					wordTLcpy(cmsg->m + _l + 1, &_ls);
				}
			}
			break;
		}
	}
}

/**
 * capi_cmsg2message() - assemble CAPI 2.0 message from _cmsg structure
 * @cmsg:	_cmsg structure
 * @msg:	buffer for assembled message
 *
 * Return value: 0 for success
 */

unsigned capi_cmsg2message(_cmsg * cmsg, u8 * msg)
{
	cmsg->m = msg;
	cmsg->l = 8;
	cmsg->p = 0;
	cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];

	pars_2_message(cmsg);

	wordTLcpy(msg + 0, &cmsg->l);
	byteTLcpy(cmsg->m + 4, &cmsg->Command);
	byteTLcpy(cmsg->m + 5, &cmsg->Subcommand);
	wordTLcpy(cmsg->m + 2, &cmsg->ApplId);
	wordTLcpy(cmsg->m + 6, &cmsg->Messagenumber);

	return 0;
}

/*-------------------------------------------------------*/
static void message_2_pars(_cmsg * cmsg)
{
	for (; TYP != _CEND; cmsg->p++) {

		switch (TYP) {
		case _CBYTE:
			byteTRcpy(cmsg->m + cmsg->l, OFF);
			cmsg->l++;
			break;
		case _CWORD:
			wordTRcpy(cmsg->m + cmsg->l, OFF);
			cmsg->l += 2;
			break;
		case _CDWORD:
			dwordTRcpy(cmsg->m + cmsg->l, OFF);
			cmsg->l += 4;
			break;
		case _CSTRUCT:
			*(u8 **) OFF = cmsg->m + cmsg->l;

			if (cmsg->m[cmsg->l] != 0xff)
				cmsg->l += 1 + cmsg->m[cmsg->l];
			else
				cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
			break;
		case _CMSTRUCT:
/*----- Metastruktur 0 -----*/
			if (cmsg->m[cmsg->l] == '\0') {
				*(_cmstruct *) OFF = CAPI_DEFAULT;
				cmsg->l++;
				jumpcstruct(cmsg);
			} else {
				unsigned _l = cmsg->l;
				*(_cmstruct *) OFF = CAPI_COMPOSE;
				cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
				cmsg->p++;
				message_2_pars(cmsg);
			}
			break;
		}
	}
}

/**
 * capi_message2cmsg() - disassemble CAPI 2.0 message into _cmsg structure
 * @cmsg:	_cmsg structure
 * @msg:	buffer for assembled message
 *
 * Return value: 0 for success
 */

unsigned capi_message2cmsg(_cmsg * cmsg, u8 * msg)
{
	memset(cmsg, 0, sizeof(_cmsg));
	cmsg->m = msg;
	cmsg->l = 8;
	cmsg->p = 0;
	byteTRcpy(cmsg->m + 4, &cmsg->Command);
	byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
	cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];

	message_2_pars(cmsg);

	wordTRcpy(msg + 0, &cmsg->l);
	wordTRcpy(cmsg->m + 2, &cmsg->ApplId);
	wordTRcpy(cmsg->m + 6, &cmsg->Messagenumber);

	return 0;
}

/**
 * capi_cmsg_header() - initialize header part of _cmsg structure
 * @cmsg:	_cmsg structure
 * @_ApplId:	ApplID field value
 * @_Command:	Command field value
 * @_Subcommand:	Subcommand field value
 * @_Messagenumber:	Message Number field value
 * @_Controller:	Controller/PLCI/NCCI field value
 *
 * Return value: 0 for success
 */

unsigned capi_cmsg_header(_cmsg * cmsg, u16 _ApplId,
			  u8 _Command, u8 _Subcommand,
			  u16 _Messagenumber, u32 _Controller)
{
	memset(cmsg, 0, sizeof(_cmsg));
	cmsg->ApplId = _ApplId;
	cmsg->Command = _Command;
	cmsg->Subcommand = _Subcommand;
	cmsg->Messagenumber = _Messagenumber;
	cmsg->adr.adrController = _Controller;
	return 0;
}

/*-------------------------------------------------------*/

static char *mnames[] =
{
	[0x01] = "ALERT_REQ",
	[0x02] = "CONNECT_REQ",
	[0x04] = "DISCONNECT_REQ",
	[0x05] = "LISTEN_REQ",
	[0x08] = "INFO_REQ",
	[0x09] = "FACILITY_REQ",
	[0x0a] = "SELECT_B_PROTOCOL_REQ",
	[0x0b] = "CONNECT_B3_REQ",
	[0x0d] = "DISCONNECT_B3_REQ",
	[0x0f] = "DATA_B3_REQ",
	[0x10] = "RESET_B3_REQ",
	[0x13] = "ALERT_CONF",
	[0x14] = "CONNECT_CONF",
	[0x16] = "DISCONNECT_CONF",
	[0x17] = "LISTEN_CONF",
	[0x18] = "MANUFACTURER_REQ",
	[0x1a] = "INFO_CONF",
	[0x1b] = "FACILITY_CONF",
	[0x1c] = "SELECT_B_PROTOCOL_CONF",
	[0x1d] = "CONNECT_B3_CONF",
	[0x1f] = "DISCONNECT_B3_CONF",
	[0x21] = "DATA_B3_CONF",
	[0x22] = "RESET_B3_CONF",
	[0x26] = "CONNECT_IND",
	[0x27] = "CONNECT_ACTIVE_IND",
	[0x28] = "DISCONNECT_IND",
	[0x2a] = "MANUFACTURER_CONF",
	[0x2c] = "INFO_IND",
	[0x2d] = "FACILITY_IND",
	[0x2f] = "CONNECT_B3_IND",
	[0x30] = "CONNECT_B3_ACTIVE_IND",
	[0x31] = "DISCONNECT_B3_IND",
	[0x33] = "DATA_B3_IND",
	[0x34] = "RESET_B3_IND",
	[0x35] = "CONNECT_B3_T90_ACTIVE_IND",
	[0x38] = "CONNECT_RESP",
	[0x39] = "CONNECT_ACTIVE_RESP",
	[0x3a] = "DISCONNECT_RESP",
	[0x3c] = "MANUFACTURER_IND",
	[0x3e] = "INFO_RESP",
	[0x3f] = "FACILITY_RESP",
	[0x41] = "CONNECT_B3_RESP",
	[0x42] = "CONNECT_B3_ACTIVE_RESP",
	[0x43] = "DISCONNECT_B3_RESP",
	[0x45] = "DATA_B3_RESP",
	[0x46] = "RESET_B3_RESP",
	[0x47] = "CONNECT_B3_T90_ACTIVE_RESP",
	[0x4e] = "MANUFACTURER_RESP"
};

/**
 * capi_cmd2str() - convert CAPI 2.0 command/subcommand number to name
 * @cmd:	command number
 * @subcmd:	subcommand number
 *
 * Return value: static string, NULL if command/subcommand unknown
 */

char *capi_cmd2str(u8 cmd, u8 subcmd)
{
	return mnames[command_2_index(cmd, subcmd)];
}


/*-------------------------------------------------------*/

#ifdef CONFIG_CAPI_TRACE

/*-------------------------------------------------------*/

static char *pnames[] =
{
    /*00 */ NULL,
    /*01 */ NULL,
    /*02 */ NULL,
    /*03 */ "Controller/PLCI/NCCI",
    /*04 */ "AdditionalInfo",
    /*05 */ "B1configuration",
    /*06 */ "B1protocol",
    /*07 */ "B2configuration",
    /*08 */ "B2protocol",
    /*09 */ "B3configuration",
    /*0a */ "B3protocol",
    /*0b */ "BC",
    /*0c */ "BChannelinformation",
    /*0d */ "BProtocol",
    /*0e */ "CalledPartyNumber",
    /*0f */ "CalledPartySubaddress",
    /*10 */ "CallingPartyNumber",
    /*11 */ "CallingPartySubaddress",
    /*12 */ "CIPmask",
    /*13 */ "CIPmask2",
    /*14 */ "CIPValue",
    /*15 */ "Class",
    /*16 */ "ConnectedNumber",
    /*17 */ "ConnectedSubaddress",
    /*18 */ "Data32",
    /*19 */ "DataHandle",
    /*1a */ "DataLength",
    /*1b */ "FacilityConfirmationParameter",
    /*1c */ "Facilitydataarray",
    /*1d */ "FacilityIndicationParameter",
    /*1e */ "FacilityRequestParameter",
    /*1f */ "FacilitySelector",
    /*20 */ "Flags",
    /*21 */ "Function",
    /*22 */ "HLC",
    /*23 */ "Info",
    /*24 */ "InfoElement",
    /*25 */ "InfoMask",
    /*26 */ "InfoNumber",
    /*27 */ "Keypadfacility",
    /*28 */ "LLC",
    /*29 */ "ManuData",
    /*2a */ "ManuID",
    /*2b */ "NCPI",
    /*2c */ "Reason",
    /*2d */ "Reason_B3",
    /*2e */ "Reject",
    /*2f */ "Useruserdata"
};



#include <stdarg.h>

/*-------------------------------------------------------*/
static _cdebbuf *bufprint(_cdebbuf *cdb, char *fmt,...)
{
	va_list f;
	size_t n,r;

	if (!cdb)
		return NULL;
	va_start(f, fmt);
	r = cdb->size - cdb->pos;
	n = vsnprintf(cdb->p, r, fmt, f);
	va_end(f);
	if (n >= r) {
		/* truncated, need bigger buffer */
		size_t ns = 2 * cdb->size;
		u_char *nb;

		while ((ns - cdb->pos) <= n)
			ns *= 2;
		nb = kmalloc(ns, GFP_ATOMIC);
		if (!nb) {
			cdebbuf_free(cdb);
			return NULL;
		}
		memcpy(nb, cdb->buf, cdb->pos);
		kfree(cdb->buf);
		nb[cdb->pos] = 0;
		cdb->buf = nb;
		cdb->p = cdb->buf + cdb->pos;
		cdb->size = ns;
		va_start(f, fmt);
		r = cdb->size - cdb->pos;
		n = vsnprintf(cdb->p, r, fmt, f);
		va_end(f);
	}
	cdb->p += n;
	cdb->pos += n;
	return cdb;
}

static _cdebbuf *printstructlen(_cdebbuf *cdb, u8 * m, unsigned len)
{
	unsigned hex = 0;

	if (!cdb)
		return NULL;
	for (; len; len--, m++)
		if (isalnum(*m) || *m == ' ') {
			if (hex)
				cdb = bufprint(cdb, ">");
			cdb = bufprint(cdb, "%c", *m);
			hex = 0;
		} else {
			if (!hex)
				cdb = bufprint(cdb, "<%02x", *m);
			else
				cdb = bufprint(cdb, " %02x", *m);
			hex = 1;
		}
	if (hex)
		cdb = bufprint(cdb, ">");
	return cdb;
}

static _cdebbuf *printstruct(_cdebbuf *cdb, u8 * m)
{
	unsigned len;

	if (m[0] != 0xff) {
		len = m[0];
		m += 1;
	} else {
		len = ((u16 *) (m + 1))[0];
		m += 3;
	}
	cdb = printstructlen(cdb, m, len);
	return cdb;
}

/*-------------------------------------------------------*/
#define NAME (pnames[cmsg->par[cmsg->p]])

static _cdebbuf *protocol_message_2_pars(_cdebbuf *cdb, _cmsg *cmsg, int level)
{
	for (; TYP != _CEND; cmsg->p++) {
		int slen = 29 + 3 - level;
		int i;

		if (!cdb)
			return NULL;
		cdb = bufprint(cdb, "  ");
		for (i = 0; i < level - 1; i++)
			cdb = bufprint(cdb, " ");

		switch (TYP) {
		case _CBYTE:
			cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u8 *) (cmsg->m + cmsg->l));
			cmsg->l++;
			break;
		case _CWORD:
			cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u16 *) (cmsg->m + cmsg->l));
			cmsg->l += 2;
			break;
		case _CDWORD:
			cdb = bufprint(cdb, "%-*s = 0x%lx\n", slen, NAME, *(u32 *) (cmsg->m + cmsg->l));
			cmsg->l += 4;
			break;
		case _CSTRUCT:
			cdb = bufprint(cdb, "%-*s = ", slen, NAME);
			if (cmsg->m[cmsg->l] == '\0')
				cdb = bufprint(cdb, "default");
			else
				cdb = printstruct(cdb, cmsg->m + cmsg->l);
			cdb = bufprint(cdb, "\n");
			if (cmsg->m[cmsg->l] != 0xff)
				cmsg->l += 1 + cmsg->m[cmsg->l];
			else
				cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);

			break;

		case _CMSTRUCT:
/*----- Metastruktur 0 -----*/
			if (cmsg->m[cmsg->l] == '\0') {
				cdb = bufprint(cdb, "%-*s = default\n", slen, NAME);
				cmsg->l++;
				jumpcstruct(cmsg);
			} else {
				char *name = NAME;
				unsigned _l = cmsg->l;
				cdb = bufprint(cdb, "%-*s\n", slen, name);
				cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
				cmsg->p++;
				cdb = protocol_message_2_pars(cdb, cmsg, level + 1);
			}
			break;
		}
	}
	return cdb;
}
/*-------------------------------------------------------*/

static _cdebbuf *g_debbuf;
static u_long g_debbuf_lock;
static _cmsg *g_cmsg;

static _cdebbuf *cdebbuf_alloc(void)
{
	_cdebbuf *cdb;

	if (likely(!test_and_set_bit(1, &g_debbuf_lock))) {
		cdb = g_debbuf;
		goto init;
	} else
		cdb = kmalloc(sizeof(_cdebbuf), GFP_ATOMIC);
	if (!cdb)
		return NULL;
	cdb->buf = kmalloc(CDEBUG_SIZE, GFP_ATOMIC);
	if (!cdb->buf) {
		kfree(cdb);
		return NULL;
	}
	cdb->size = CDEBUG_SIZE;
init:
	cdb->buf[0] = 0;
	cdb->p = cdb->buf;
	cdb->pos = 0;
	return cdb;
}

/**
 * cdebbuf_free() - free CAPI debug buffer
 * @cdb:	buffer to free
 */

void cdebbuf_free(_cdebbuf *cdb)
{
	if (likely(cdb == g_debbuf)) {
		test_and_clear_bit(1, &g_debbuf_lock);
		return;
	}
	if (likely(cdb))
		kfree(cdb->buf);
	kfree(cdb);
}


/**
 * capi_message2str() - format CAPI 2.0 message for printing
 * @msg:	CAPI 2.0 message
 *
 * Allocates a CAPI debug buffer and fills it with a printable representation
 * of the CAPI 2.0 message in @msg.
 * Return value: allocated debug buffer, NULL on error
 * The returned buffer should be freed by a call to cdebbuf_free() after use.
 */

_cdebbuf *capi_message2str(u8 * msg)
{
	_cdebbuf *cdb;
	_cmsg	*cmsg;

	cdb = cdebbuf_alloc();
	if (unlikely(!cdb))
		return NULL;
	if (likely(cdb == g_debbuf))
		cmsg = g_cmsg;
	else
		cmsg = kmalloc(sizeof(_cmsg), GFP_ATOMIC);
	if (unlikely(!cmsg)) {
		cdebbuf_free(cdb);
		return NULL;
	}
	cmsg->m = msg;
	cmsg->l = 8;
	cmsg->p = 0;
	byteTRcpy(cmsg->m + 4, &cmsg->Command);
	byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
	cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];

	cdb = bufprint(cdb, "%-26s ID=%03d #0x%04x LEN=%04d\n",
		 mnames[command_2_index(cmsg->Command, cmsg->Subcommand)],
		 ((unsigned short *) msg)[1],
		 ((unsigned short *) msg)[3],
		 ((unsigned short *) msg)[0]);

	cdb = protocol_message_2_pars(cdb, cmsg, 1);
	if (unlikely(cmsg != g_cmsg))
		kfree(cmsg);
	return cdb;
}

/**
 * capi_cmsg2str() - format _cmsg structure for printing
 * @cmsg:	_cmsg structure
 *
 * Allocates a CAPI debug buffer and fills it with a printable representation
 * of the CAPI 2.0 message stored in @cmsg by a previous call to
 * capi_cmsg2message() or capi_message2cmsg().
 * Return value: allocated debug buffer, NULL on error
 * The returned buffer should be freed by a call to cdebbuf_free() after use.
 */

_cdebbuf *capi_cmsg2str(_cmsg * cmsg)
{
	_cdebbuf *cdb;

	if (!cmsg->m)
		return NULL;	/* no message */
	cdb = cdebbuf_alloc();
	if (!cdb)
		return NULL;
	cmsg->l = 8;
	cmsg->p = 0;
	cdb = bufprint(cdb, "%s ID=%03d #0x%04x LEN=%04d\n",
		 mnames[command_2_index(cmsg->Command, cmsg->Subcommand)],
		 ((u16 *) cmsg->m)[1],
		 ((u16 *) cmsg->m)[3],
		 ((u16 *) cmsg->m)[0]);
	cdb = protocol_message_2_pars(cdb, cmsg, 1);
	return cdb;
}

int __init cdebug_init(void)
{
	g_cmsg= kmalloc(sizeof(_cmsg), GFP_KERNEL);
	if (!g_cmsg)
		return -ENOMEM;
	g_debbuf = kmalloc(sizeof(_cdebbuf), GFP_KERNEL);
	if (!g_debbuf) {
		kfree(g_cmsg);
		return -ENOMEM;
	}
	g_debbuf->buf = kmalloc(CDEBUG_GSIZE, GFP_KERNEL);
	if (!g_debbuf->buf) {
		kfree(g_cmsg);
		kfree(g_debbuf);
		return -ENOMEM;
	}
	g_debbuf->size = CDEBUG_GSIZE;
	g_debbuf->buf[0] = 0;
	g_debbuf->p = g_debbuf->buf;
	g_debbuf->pos = 0;
	return 0;
}

void __exit cdebug_exit(void)
{
	if (g_debbuf)
		kfree(g_debbuf->buf);
	kfree(g_debbuf);
	kfree(g_cmsg);
}

#else /* !CONFIG_CAPI_TRACE */

static _cdebbuf g_debbuf = {"CONFIG_CAPI_TRACE not enabled", NULL, 0, 0};

_cdebbuf *capi_message2str(u8 * msg)
{
	return &g_debbuf;
}

_cdebbuf *capi_cmsg2str(_cmsg * cmsg)
{
	return &g_debbuf;
}

void cdebbuf_free(_cdebbuf *cdb)
{
}

int __init cdebug_init(void)
{
	return 0;
}

void __exit cdebug_exit(void)
{
}

#endif

EXPORT_SYMBOL(cdebbuf_free);
EXPORT_SYMBOL(capi_cmsg2message);
EXPORT_SYMBOL(capi_message2cmsg);
EXPORT_SYMBOL(capi_cmsg_header);
EXPORT_SYMBOL(capi_cmd2str);
EXPORT_SYMBOL(capi_cmsg2str);
EXPORT_SYMBOL(capi_message2str);
EXPORT_SYMBOL(capi_info2str);