summaryrefslogtreecommitdiff
path: root/include/linux/isdn.h
blob: 9cb2855bb170d34cd4e0b1c6b812312befb3c035 (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
/* $Id: isdn.h,v 1.125.2.3 2004/02/10 01:07:14 keil Exp $
 *
 * Main header for the Linux ISDN subsystem (linklevel).
 *
 * Copyright 1994,95,96 by Fritz Elfert (fritz@isdn4linux.de)
 * Copyright 1995,96    by Thinking Objects Software GmbH Wuerzburg
 * Copyright 1995,96    by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
 * 
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 */

#ifndef __ISDN_H__
#define __ISDN_H__

#include <linux/ioctl.h>

#ifdef CONFIG_COBALT_MICRO_SERVER
/* Save memory */
#define ISDN_MAX_DRIVERS    2
#define ISDN_MAX_CHANNELS   8
#else
#define ISDN_MAX_DRIVERS    32
#define ISDN_MAX_CHANNELS   64
#endif

/* New ioctl-codes */
#define IIOCNETAIF  _IO('I',1)
#define IIOCNETDIF  _IO('I',2)
#define IIOCNETSCF  _IO('I',3)
#define IIOCNETGCF  _IO('I',4)
#define IIOCNETANM  _IO('I',5)
#define IIOCNETDNM  _IO('I',6)
#define IIOCNETGNM  _IO('I',7)
#define IIOCGETSET  _IO('I',8) /* no longer supported */
#define IIOCSETSET  _IO('I',9) /* no longer supported */
#define IIOCSETVER  _IO('I',10)
#define IIOCNETHUP  _IO('I',11)
#define IIOCSETGST  _IO('I',12)
#define IIOCSETBRJ  _IO('I',13)
#define IIOCSIGPRF  _IO('I',14)
#define IIOCGETPRF  _IO('I',15)
#define IIOCSETPRF  _IO('I',16)
#define IIOCGETMAP  _IO('I',17)
#define IIOCSETMAP  _IO('I',18)
#define IIOCNETASL  _IO('I',19)
#define IIOCNETDIL  _IO('I',20)
#define IIOCGETCPS  _IO('I',21)
#define IIOCGETDVR  _IO('I',22)
#define IIOCNETLCR  _IO('I',23) /* dwabc ioctl for LCR from isdnlog */
#define IIOCNETDWRSET  _IO('I',24) /* dwabc ioctl to reset abc-values to default on a net-interface */

#define IIOCNETALN  _IO('I',32)
#define IIOCNETDLN  _IO('I',33)

#define IIOCNETGPN  _IO('I',34)

#define IIOCDBGVAR  _IO('I',127)

#define IIOCDRVCTL  _IO('I',128)

/* cisco hdlck device private ioctls */
#define SIOCGKEEPPERIOD	(SIOCDEVPRIVATE + 0)
#define SIOCSKEEPPERIOD	(SIOCDEVPRIVATE + 1)
#define SIOCGDEBSERINT	(SIOCDEVPRIVATE + 2)
#define SIOCSDEBSERINT	(SIOCDEVPRIVATE + 3)

/* Packet encapsulations for net-interfaces */
#define ISDN_NET_ENCAP_ETHER      0
#define ISDN_NET_ENCAP_RAWIP      1
#define ISDN_NET_ENCAP_IPTYP      2
#define ISDN_NET_ENCAP_CISCOHDLC  3 /* Without SLARP and keepalive */
#define ISDN_NET_ENCAP_SYNCPPP    4
#define ISDN_NET_ENCAP_UIHDLC     5
#define ISDN_NET_ENCAP_CISCOHDLCK 6 /* With SLARP and keepalive    */
#define ISDN_NET_ENCAP_X25IFACE   7 /* Documentation/networking/x25-iface.txt*/
#define ISDN_NET_ENCAP_MAX_ENCAP  ISDN_NET_ENCAP_X25IFACE

/* Facility which currently uses an ISDN-channel */
#define ISDN_USAGE_NONE       0
#define ISDN_USAGE_RAW        1
#define ISDN_USAGE_MODEM      2
#define ISDN_USAGE_NET        3
#define ISDN_USAGE_VOICE      4
#define ISDN_USAGE_FAX        5
#define ISDN_USAGE_MASK       7 /* Mask to get plain usage */
#define ISDN_USAGE_DISABLED  32 /* This bit is set, if channel is disabled */
#define ISDN_USAGE_EXCLUSIVE 64 /* This bit is set, if channel is exclusive */
#define ISDN_USAGE_OUTGOING 128 /* This bit is set, if channel is outgoing  */

#define ISDN_MODEM_NUMREG    24        /* Number of Modem-Registers        */
#define ISDN_LMSNLEN         255 /* Length of tty's Listen-MSN string */
#define ISDN_CMSGLEN	     50	 /* Length of CONNECT-Message to add for Modem */

#define ISDN_MSNLEN          32
#define NET_DV 0x06  /* Data version for isdn_net_ioctl_cfg   */
#define TTY_DV 0x06  /* Data version for iprofd etc.          */

#define INF_DV 0x01  /* Data version for /dev/isdninfo        */

typedef struct {
  char drvid[25];
  unsigned long arg;
} isdn_ioctl_struct;

typedef struct {
  char name[10];
  char phone[ISDN_MSNLEN];
  int  outgoing;
} isdn_net_ioctl_phone;

typedef struct {
  char name[10];     /* Name of interface                     */
  char master[10];   /* Name of Master for Bundling           */
  char slave[10];    /* Name of Slave for Bundling            */
  char eaz[256];     /* EAZ/MSN                               */
  char drvid[25];    /* DriverId for Bindings                 */
  int  onhtime;      /* Hangup-Timeout                        */
  int  charge;       /* Charge-Units                          */
  int  l2_proto;     /* Layer-2 protocol                      */
  int  l3_proto;     /* Layer-3 protocol                      */
  int  p_encap;      /* Encapsulation                         */
  int  exclusive;    /* Channel, if bound exclusive           */
  int  dialmax;      /* Dial Retry-Counter                    */
  int  slavedelay;   /* Delay until slave starts up           */
  int  cbdelay;      /* Delay before Callback                 */
  int  chargehup;    /* Flag: Charge-Hangup                   */
  int  ihup;         /* Flag: Hangup-Timeout on incoming line */
  int  secure;       /* Flag: Secure                          */
  int  callback;     /* Flag: Callback                        */
  int  cbhup;        /* Flag: Reject Call before Callback     */
  int  pppbind;      /* ippp device for bindings              */
  int  chargeint;    /* Use fixed charge interval length      */
  int  triggercps;   /* BogoCPS needed for triggering slave   */
  int  dialtimeout;  /* Dial-Timeout                          */
  int  dialwait;     /* Time to wait after failed dial        */
  int  dialmode;     /* Flag: off / on / auto                 */
} isdn_net_ioctl_cfg;

#define ISDN_NET_DIALMODE_MASK  0xC0    /* bits for status                */
#define ISDN_NET_DM_OFF	        0x00    /* this interface is stopped      */
#define ISDN_NET_DM_MANUAL	0x40    /* this interface is on (manual)  */
#define ISDN_NET_DM_AUTO	0x80    /* this interface is autodial     */
#define ISDN_NET_DIALMODE(x) ((&(x))->flags & ISDN_NET_DIALMODE_MASK)

#ifdef __KERNEL__

#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/major.h>
#include <asm/io.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/wait.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial_reg.h>
#include <linux/fcntl.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/ip.h>
#include <linux/in.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/tcp.h>
#include <linux/mutex.h>

#define ISDN_TTY_MAJOR    43
#define ISDN_TTYAUX_MAJOR 44
#define ISDN_MAJOR        45

/* The minor-devicenumbers for Channel 0 and 1 are used as arguments for
 * physical Channel-Mapping, so they MUST NOT be changed without changing
 * the correspondent code in isdn.c
 */

#define ISDN_MINOR_B        0
#define ISDN_MINOR_BMAX     (ISDN_MAX_CHANNELS-1)
#define ISDN_MINOR_CTRL     64
#define ISDN_MINOR_CTRLMAX  (64 + (ISDN_MAX_CHANNELS-1))
#define ISDN_MINOR_PPP      128
#define ISDN_MINOR_PPPMAX   (128 + (ISDN_MAX_CHANNELS-1))
#define ISDN_MINOR_STATUS   255

#ifdef CONFIG_ISDN_PPP

#ifdef CONFIG_ISDN_PPP_VJ
#  include <net/slhc_vj.h>
#endif

#include <linux/ppp_defs.h>
#include <linux/if_ppp.h>

#include <linux/isdn_ppp.h>
#endif

#ifdef CONFIG_ISDN_X25
#  include <linux/concap.h>
#endif

#include <linux/isdnif.h>

#define ISDN_DRVIOCTL_MASK       0x7f  /* Mask for Device-ioctl */

/* Until now unused */
#define ISDN_SERVICE_VOICE 1
#define ISDN_SERVICE_AB    1<<1 
#define ISDN_SERVICE_X21   1<<2
#define ISDN_SERVICE_G4    1<<3
#define ISDN_SERVICE_BTX   1<<4
#define ISDN_SERVICE_DFUE  1<<5
#define ISDN_SERVICE_X25   1<<6
#define ISDN_SERVICE_TTX   1<<7
#define ISDN_SERVICE_MIXED 1<<8
#define ISDN_SERVICE_FW    1<<9
#define ISDN_SERVICE_GTEL  1<<10
#define ISDN_SERVICE_BTXN  1<<11
#define ISDN_SERVICE_BTEL  1<<12

/* Macros checking plain usage */
#define USG_NONE(x)         ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NONE)
#define USG_RAW(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_RAW)
#define USG_MODEM(x)        ((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM)
#define USG_VOICE(x)        ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)
#define USG_NET(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NET)
#define USG_FAX(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_FAX)
#define USG_OUTGOING(x)     ((x & ISDN_USAGE_OUTGOING)==ISDN_USAGE_OUTGOING)
#define USG_MODEMORVOICE(x) (((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM) || \
                             ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)     )

/* Timer-delays and scheduling-flags */
#define ISDN_TIMER_RES         4                         /* Main Timer-Resolution   */
#define ISDN_TIMER_02SEC       (HZ/ISDN_TIMER_RES/5)     /* Slow-Timer1 .2 sec      */
#define ISDN_TIMER_1SEC        (HZ/ISDN_TIMER_RES)       /* Slow-Timer2 1 sec       */
#define ISDN_TIMER_RINGING     5 /* tty RINGs = ISDN_TIMER_1SEC * this factor       */
#define ISDN_TIMER_KEEPINT    10 /* Cisco-Keepalive = ISDN_TIMER_1SEC * this factor */
#define ISDN_TIMER_MODEMREAD   1
#define ISDN_TIMER_MODEMPLUS   2
#define ISDN_TIMER_MODEMRING   4
#define ISDN_TIMER_MODEMXMIT   8
#define ISDN_TIMER_NETDIAL    16 
#define ISDN_TIMER_NETHANGUP  32
#define ISDN_TIMER_CARRIER   256 /* Wait for Carrier */
#define ISDN_TIMER_FAST      (ISDN_TIMER_MODEMREAD | ISDN_TIMER_MODEMPLUS | \
                              ISDN_TIMER_MODEMXMIT)
#define ISDN_TIMER_SLOW      (ISDN_TIMER_MODEMRING | ISDN_TIMER_NETHANGUP | \
                              ISDN_TIMER_NETDIAL | ISDN_TIMER_CARRIER)

/* Timeout-Values for isdn_net_dial() */
#define ISDN_TIMER_DTIMEOUT10 (10*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
#define ISDN_TIMER_DTIMEOUT15 (15*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
#define ISDN_TIMER_DTIMEOUT60 (60*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))

/* GLOBAL_FLAGS */
#define ISDN_GLOBAL_STOPPED 1

/*=================== Start of ip-over-ISDN stuff =========================*/

/* Feature- and status-flags for a net-interface */
#define ISDN_NET_CONNECTED  0x01       /* Bound to ISDN-Channel             */
#define ISDN_NET_SECURE     0x02       /* Accept calls from phonelist only  */
#define ISDN_NET_CALLBACK   0x04       /* activate callback                 */
#define ISDN_NET_CBHUP      0x08       /* hangup before callback            */
#define ISDN_NET_CBOUT      0x10       /* remote machine does callback      */

#define ISDN_NET_MAGIC      0x49344C02 /* for paranoia-checking             */

/* Phone-list-element */
typedef struct {
  void *next;
  char num[ISDN_MSNLEN];
} isdn_net_phone;

/*
   Principles when extending structures for generic encapsulation protocol
   ("concap") support:
   - Stuff which is hardware specific (here i4l-specific) goes in 
     the netdev -> local structure (here: isdn_net_local)
   - Stuff which is encapsulation protocol specific goes in the structure
     which holds the linux device structure (here: isdn_net_device)
*/

/* Local interface-data */
typedef struct isdn_net_local_s {
  ulong                  magic;
  struct net_device_stats stats;       /* Ethernet Statistics              */
  int                    isdn_device;  /* Index to isdn-device             */
  int                    isdn_channel; /* Index to isdn-channel            */
  int			 ppp_slot;     /* PPPD device slot number          */
  int                    pre_device;   /* Preselected isdn-device          */
  int                    pre_channel;  /* Preselected isdn-channel         */
  int                    exclusive;    /* If non-zero idx to reserved chan.*/
  int                    flags;        /* Connection-flags                 */
  int                    dialretry;    /* Counter for Dialout-retries      */
  int                    dialmax;      /* Max. Number of Dial-retries      */
  int                    cbdelay;      /* Delay before Callback starts     */
  int                    dtimer;       /* Timeout-counter for dialing      */
  char                   msn[ISDN_MSNLEN]; /* MSNs/EAZs for this interface */
  u_char                 cbhup;        /* Flag: Reject Call before Callback*/
  u_char                 dialstate;    /* State for dialing                */
  u_char                 p_encap;      /* Packet encapsulation             */
                                       /*   0 = Ethernet over ISDN         */
				       /*   1 = RAW-IP                     */
                                       /*   2 = IP with type field         */
  u_char                 l2_proto;     /* Layer-2-protocol                 */
				       /* See ISDN_PROTO_L2..-constants in */
                                       /* isdnif.h                         */
                                       /*   0 = X75/LAPB with I-Frames     */
				       /*   1 = X75/LAPB with UI-Frames    */
				       /*   2 = X75/LAPB with BUI-Frames   */
				       /*   3 = HDLC                       */
  u_char                 l3_proto;     /* Layer-3-protocol                 */
				       /* See ISDN_PROTO_L3..-constants in */
                                       /* isdnif.h                         */
                                       /*   0 = Transparent                */
  int                    huptimer;     /* Timeout-counter for auto-hangup  */
  int                    charge;       /* Counter for charging units       */
  ulong                  chargetime;   /* Timer for Charging info          */
  int                    hupflags;     /* Flags for charge-unit-hangup:    */
				       /* bit0: chargeint is invalid       */
				       /* bit1: Getting charge-interval    */
                                       /* bit2: Do charge-unit-hangup      */
                                       /* bit3: Do hangup even on incoming */
  int                    outgoing;     /* Flag: outgoing call              */
  int                    onhtime;      /* Time to keep link up             */
  int                    chargeint;    /* Interval between charge-infos    */
  int                    onum;         /* Flag: at least 1 outgoing number */
  int                    cps;          /* current speed of this interface  */
  int                    transcount;   /* byte-counter for cps-calculation */
  int                    sqfull;       /* Flag: netdev-queue overloaded    */
  ulong                  sqfull_stamp; /* Start-Time of overload           */
  ulong                  slavedelay;   /* Dynamic bundling delaytime       */
  int                    triggercps;   /* BogoCPS needed for trigger slave */
  isdn_net_phone         *phone[2];    /* List of remote-phonenumbers      */
				       /* phone[0] = Incoming Numbers      */
				       /* phone[1] = Outgoing Numbers      */
  isdn_net_phone         *dial;        /* Pointer to dialed number         */
  struct net_device      *master;      /* Ptr to Master device for slaves  */
  struct net_device      *slave;       /* Ptr to Slave device for masters  */
  struct isdn_net_local_s *next;       /* Ptr to next link in bundle       */
  struct isdn_net_local_s *last;       /* Ptr to last link in bundle       */
  struct isdn_net_dev_s  *netdev;      /* Ptr to netdev                    */
  struct sk_buff_head    super_tx_queue; /* List of supervisory frames to  */
	                               /* be transmitted asap              */
  atomic_t frame_cnt;                  /* number of frames currently       */
                        	       /* queued in HL driver              */    
                                       /* Ptr to orig. hard_header_cache   */
  spinlock_t             xmit_lock;    /* used to protect the xmit path of */
                                       /* a particular channel (including  */
                                       /* the frame_cnt                    */

  int  pppbind;                        /* ippp device for bindings         */
  int					dialtimeout;	/* How long shall we try on dialing? (jiffies) */
  int					dialwait;		/* How long shall we wait after failed attempt? (jiffies) */
  ulong					dialstarted;	/* jiffies of first dialing-attempt */
  ulong					dialwait_timer;	/* jiffies of earliest next dialing-attempt */
  int					huptimeout;		/* How long will the connection be up? (seconds) */
#ifdef CONFIG_ISDN_X25
  struct concap_device_ops *dops;      /* callbacks used by encapsulator   */
#endif
  /* use an own struct for that in later versions */
  ulong cisco_myseq;                   /* Local keepalive seq. for Cisco   */
  ulong cisco_mineseen;                /* returned keepalive seq. from remote */
  ulong cisco_yourseq;                 /* Remote keepalive seq. for Cisco  */
  int cisco_keepalive_period;		/* keepalive period */
  ulong cisco_last_slarp_in;		/* jiffie of last keepalive packet we received */
  char cisco_line_state;		/* state of line according to keepalive packets */
  char cisco_debserint;			/* debugging flag of cisco hdlc with slarp */
  struct timer_list cisco_timer;
  struct work_struct tqueue;
} isdn_net_local;

/* the interface itself */
typedef struct isdn_net_dev_s {
  isdn_net_local *local;
  isdn_net_local *queue;               /* circular list of all bundled
					  channels, which are currently
					  online                           */
  spinlock_t queue_lock;               /* lock to protect queue            */
  void *next;                          /* Pointer to next isdn-interface   */
  struct net_device *dev;              /* interface to upper levels        */
#ifdef CONFIG_ISDN_PPP
  ippp_bundle * pb;		/* pointer to the common bundle structure
   			         * with the per-bundle data */
#endif
#ifdef CONFIG_ISDN_X25
  struct concap_proto  *cprot; /* connection oriented encapsulation protocol */
#endif

} isdn_net_dev;

/*===================== End of ip-over-ISDN stuff ===========================*/

/*======================= Start of ISDN-tty stuff ===========================*/

#define ISDN_ASYNC_MAGIC          0x49344C01 /* for paranoia-checking        */
#define ISDN_ASYNC_INITIALIZED	  0x80000000 /* port was initialized         */
#define ISDN_ASYNC_CALLOUT_ACTIVE 0x40000000 /* Call out device active       */
#define ISDN_ASYNC_NORMAL_ACTIVE  0x20000000 /* Normal device active         */
#define ISDN_ASYNC_CLOSING	  0x08000000 /* Serial port is closing       */
#define ISDN_ASYNC_CTS_FLOW	  0x04000000 /* Do CTS flow control          */
#define ISDN_ASYNC_CHECK_CD	  0x02000000 /* i.e., CLOCAL                 */
#define ISDN_ASYNC_HUP_NOTIFY         0x0001 /* Notify tty on hangups/closes */
#define ISDN_ASYNC_SESSION_LOCKOUT    0x0100 /* Lock cua opens on session    */
#define ISDN_ASYNC_PGRP_LOCKOUT       0x0200 /* Lock cua opens on pgrp       */
#define ISDN_ASYNC_CALLOUT_NOHUP      0x0400 /* No hangup for cui            */
#define ISDN_ASYNC_SPLIT_TERMIOS      0x0008 /* Sep. termios for dialin/out  */
#define ISDN_SERIAL_XMIT_SIZE           1024 /* Default bufsize for write    */
#define ISDN_SERIAL_XMIT_MAX            4000 /* Maximum bufsize for write    */
#define ISDN_SERIAL_TYPE_NORMAL            1
#define ISDN_SERIAL_TYPE_CALLOUT           2

#ifdef CONFIG_ISDN_AUDIO
/* For using sk_buffs with audio we need some private variables
 * within each sk_buff. For this purpose, we declare a struct here,
 * and put it always at the private skb->cb data array. A few macros help
 * accessing the variables.
 */
typedef struct _isdn_audio_data {
  unsigned short dle_count;
  unsigned char  lock;
} isdn_audio_data_t;

#define ISDN_AUDIO_SKB_DLECOUNT(skb)	(((isdn_audio_data_t *)&skb->cb[0])->dle_count)
#define ISDN_AUDIO_SKB_LOCK(skb)	(((isdn_audio_data_t *)&skb->cb[0])->lock)
#endif

/* Private data of AT-command-interpreter */
typedef struct atemu {
	u_char       profile[ISDN_MODEM_NUMREG]; /* Modem-Regs. Profile 0              */
	u_char       mdmreg[ISDN_MODEM_NUMREG];  /* Modem-Registers                    */
	char         pmsn[ISDN_MSNLEN];          /* EAZ/MSNs Profile 0                 */
	char         msn[ISDN_MSNLEN];           /* EAZ/MSN                            */
	char         plmsn[ISDN_LMSNLEN];        /* Listening MSNs Profile 0           */
	char         lmsn[ISDN_LMSNLEN];         /* Listening MSNs                     */
	char         cpn[ISDN_MSNLEN];           /* CalledPartyNumber on incoming call */
	char         connmsg[ISDN_CMSGLEN];	 /* CONNECT-Msg from HL-Driver	       */
#ifdef CONFIG_ISDN_AUDIO
	u_char       vpar[10];                   /* Voice-parameters                   */
	int          lastDLE;                    /* Flag for voice-coding: DLE seen    */
#endif
	int          mdmcmdl;                    /* Length of Modem-Commandbuffer      */
	int          pluscount;                  /* Counter for +++ sequence           */
	u_long       lastplus;                   /* Timestamp of last +                */
	int	     carrierwait;                /* Seconds of carrier waiting         */
	char         mdmcmd[255];                /* Modem-Commandbuffer                */
	unsigned int charge;                     /* Charge units of current connection */
} atemu;

/* Private data (similar to async_struct in <linux/serial.h>) */
typedef struct modem_info {
  int			magic;
  struct module		*owner;
  int			flags;		 /* defined in tty.h               */
  int			x_char;		 /* xon/xoff character             */
  int			mcr;		 /* Modem control register         */
  int                   msr;             /* Modem status register          */
  int                   lsr;             /* Line status register           */
  int			line;
  int			count;		 /* # of fd on device              */
  int			blocked_open;	 /* # of blocked opens             */
  long			session;	 /* Session of opening process     */
  long			pgrp;		 /* pgrp of opening process        */
  int                   online;          /* 1 = B-Channel is up, drop data */
					 /* 2 = B-Channel is up, deliver d.*/
  int                   dialing;         /* Dial in progress or ATA        */
  int                   rcvsched;        /* Receive needs schedule         */
  int                   isdn_driver;	 /* Index to isdn-driver           */
  int                   isdn_channel;    /* Index to isdn-channel          */
  int                   drv_index;       /* Index to dev->usage            */
  int                   ncarrier;        /* Flag: schedule NO CARRIER      */
  unsigned char         last_cause[8];   /* Last cause message             */
  unsigned char         last_num[ISDN_MSNLEN];
	                                 /* Last phone-number              */
  unsigned char         last_l2;         /* Last layer-2 protocol          */
  unsigned char         last_si;         /* Last service                   */
  unsigned char         last_lhup;       /* Last hangup local?             */
  unsigned char         last_dir;        /* Last direction (in or out)     */
  struct timer_list     nc_timer;        /* Timer for delayed NO CARRIER   */
  int                   send_outstanding;/* # of outstanding send-requests */
  int                   xmit_size;       /* max. # of chars in xmit_buf    */
  int                   xmit_count;      /* # of chars in xmit_buf         */
  unsigned char         *xmit_buf;       /* transmit buffer                */
  struct sk_buff_head   xmit_queue;      /* transmit queue                 */
  atomic_t              xmit_lock;       /* Semaphore for isdn_tty_write   */
#ifdef CONFIG_ISDN_AUDIO
  int                   vonline;         /* Voice-channel status           */
					 /* Bit 0 = recording              */
					 /* Bit 1 = playback               */
					 /* Bit 2 = playback, DLE-ETX seen */
  struct sk_buff_head   dtmf_queue;      /* queue for dtmf results         */
  void                  *adpcms;         /* state for adpcm decompression  */
  void                  *adpcmr;         /* state for adpcm compression    */
  void                  *dtmf_state;     /* state for dtmf decoder         */
  void                  *silence_state;  /* state for silence detection    */
#endif
#ifdef CONFIG_ISDN_TTY_FAX
  struct T30_s		*fax;		 /* T30 Fax Group 3 data/interface */
  int			faxonline;	 /* Fax-channel status             */
#endif
  struct tty_struct 	*tty;            /* Pointer to corresponding tty   */
  atemu                 emu;             /* AT-emulator data               */
  struct ktermios	normal_termios;  /* For saving termios structs     */
  struct ktermios	callout_termios;
  wait_queue_head_t	open_wait, close_wait;
  spinlock_t	        readlock;
} modem_info;

#define ISDN_MODEM_WINSIZE 8

/* Description of one ISDN-tty */
typedef struct _isdn_modem {
  int                refcount;				/* Number of opens        */
  struct tty_driver  *tty_modem;			/* tty-device             */
  struct tty_struct  *modem_table[ISDN_MAX_CHANNELS];	/* ?? copied from Orig    */
  struct ktermios     *modem_termios[ISDN_MAX_CHANNELS];
  struct ktermios     *modem_termios_locked[ISDN_MAX_CHANNELS];
  modem_info         info[ISDN_MAX_CHANNELS];	   /* Private data           */
} isdn_modem_t;

/*======================= End of ISDN-tty stuff ============================*/

/*======================== Start of V.110 stuff ============================*/
#define V110_BUFSIZE 1024

typedef struct {
	int nbytes;                    /* 1 Matrixbyte -> nbytes in stream     */
	int nbits;                     /* Number of used bits in streambyte    */
	unsigned char key;             /* Bitmask in stream eg. 11 (nbits=2)   */
	int decodelen;                 /* Amount of data in decodebuf          */
	int SyncInit;                  /* Number of sync frames to send        */
	unsigned char *OnlineFrame;    /* Precalculated V110 idle frame        */
	unsigned char *OfflineFrame;   /* Precalculated V110 sync Frame        */
	int framelen;                  /* Length of frames                     */
	int skbuser;                   /* Number of unacked userdata skbs      */
	int skbidle;                   /* Number of unacked idle/sync skbs     */
	int introducer;                /* Local vars for decoder               */
	int dbit;
	unsigned char b;
	int skbres;                    /* space to reserve in outgoing skb     */
	int maxsize;                   /* maxbufsize of lowlevel driver        */
	unsigned char *encodebuf;      /* temporary buffer for encoding        */
	unsigned char decodebuf[V110_BUFSIZE]; /* incomplete V110 matrices     */
} isdn_v110_stream;

/*========================= End of V.110 stuff =============================*/

/*======================= Start of general stuff ===========================*/

typedef struct {
	char *next;
	char *private;
} infostruct;

#define DRV_FLAG_RUNNING 1
#define DRV_FLAG_REJBUS  2
#define DRV_FLAG_LOADED  4

/* Description of hardware-level-driver */
typedef struct _isdn_driver {
	ulong               online;           /* Channel-Online flags             */
	ulong               flags;            /* Misc driver Flags                */
	int                 locks;            /* Number of locks for this driver  */
	int                 channels;         /* Number of channels               */
	wait_queue_head_t   st_waitq;         /* Wait-Queue for status-read's     */
	int                 maxbufsize;       /* Maximum Buffersize supported     */
	unsigned long       pktcount;         /* Until now: unused                */
	int                 stavail;          /* Chars avail on Status-device     */
	isdn_if            *interface;        /* Interface to driver              */
	int                *rcverr;           /* Error-counters for B-Ch.-receive */
	int                *rcvcount;         /* Byte-counters for B-Ch.-receive  */
#ifdef CONFIG_ISDN_AUDIO
	unsigned long      DLEflag;           /* Flags: Insert DLE at next read   */
#endif
	struct sk_buff_head *rpqueue;         /* Pointers to start of Rcv-Queue   */
	wait_queue_head_t  *rcv_waitq;       /* Wait-Queues for B-Channel-Reads  */
	wait_queue_head_t  *snd_waitq;       /* Wait-Queue for B-Channel-Send's  */
	char               msn2eaz[10][ISDN_MSNLEN];  /* Mapping-Table MSN->EAZ   */
} isdn_driver_t;

/* Main driver-data */
typedef struct isdn_devt {
	struct module     *owner;
	spinlock_t	  lock;
	unsigned short    flags;		      /* Bitmapped Flags:           */
	int               drivers;		      /* Current number of drivers  */
	int               channels;		      /* Current number of channels */
	int               net_verbose;                /* Verbose-Flag               */
	int               modempoll;		      /* Flag: tty-read active      */
	spinlock_t	  timerlock;
	int               tflags;                     /* Timer-Flags:               */
	/*  see ISDN_TIMER_..defines  */
	int               global_flags;
	infostruct        *infochain;                 /* List of open info-devs.    */
	wait_queue_head_t info_waitq;                 /* Wait-Queue for isdninfo    */
	struct timer_list timer;		      /* Misc.-function Timer       */
	int               chanmap[ISDN_MAX_CHANNELS]; /* Map minor->device-channel  */
	int               drvmap[ISDN_MAX_CHANNELS];  /* Map minor->driver-index    */
	int               usage[ISDN_MAX_CHANNELS];   /* Used by tty/ip/voice       */
	char              num[ISDN_MAX_CHANNELS][ISDN_MSNLEN];
	/* Remote number of active ch.*/
	int               m_idx[ISDN_MAX_CHANNELS];   /* Index for mdm....          */
	isdn_driver_t     *drv[ISDN_MAX_DRIVERS];     /* Array of drivers           */
	isdn_net_dev      *netdev;		      /* Linked list of net-if's    */
	char              drvid[ISDN_MAX_DRIVERS][20];/* Driver-ID                 */
	struct task_struct *profd;                    /* For iprofd                 */
	isdn_modem_t      mdm;			      /* tty-driver-data            */
	isdn_net_dev      *rx_netdev[ISDN_MAX_CHANNELS]; /* rx netdev-pointers     */
	isdn_net_dev      *st_netdev[ISDN_MAX_CHANNELS]; /* stat netdev-pointers   */
	ulong             ibytes[ISDN_MAX_CHANNELS];  /* Statistics incoming bytes  */
	ulong             obytes[ISDN_MAX_CHANNELS];  /* Statistics outgoing bytes  */
	int               v110emu[ISDN_MAX_CHANNELS]; /* V.110 emulator-mode 0=none */
	atomic_t          v110use[ISDN_MAX_CHANNELS]; /* Usage-Semaphore for stream */
	isdn_v110_stream  *v110[ISDN_MAX_CHANNELS];   /* V.110 private data         */
	struct mutex      mtx;                        /* serialize list access*/
	unsigned long     global_features;
} isdn_dev;

extern isdn_dev *dev;


#endif /* __KERNEL__ */

#endif /* __ISDN_H__ */