isdn.h 23 KB
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
/* $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/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>
#include <uapi/linux/isdn.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/ppp-ioctl.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_SERIAL_XMIT_SIZE           1024 /* Default bufsize for write    */
#define ISDN_SERIAL_XMIT_MAX            4000 /* Maximum bufsize for write    */

#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 tty_port	port;
  int			x_char;		 /* xon/xoff character             */
  int			mcr;		 /* Modem control register         */
  int                   msr;             /* Modem status register          */
  int                   lsr;             /* Line status register           */
  int			line;
  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         */
  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
  atemu                 emu;             /* AT-emulator data               */
  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 /* __ISDN_H__ */