include/linux/isdn.h

   1 /* $Id: isdn.h,v 1.81 1999/10/27 21:21:18 detabc Exp $
   2  *
   3  * Main header for the Linux ISDN subsystem (linklevel).
   4  *
   5  * Copyright 1994,95,96 by Fritz Elfert (fritz@isdn4linux.de)
   6  * Copyright 1995,96    by Thinking Objects Software GmbH Wuerzburg
   7  * Copyright 1995,96    by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2, or (at your option)
  12  * any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  * $Log: isdn.h,v $
  24  * Revision 1.81  1999/10/27 21:21:18  detabc
  25  * Added support for building logically-bind-group's per interface.
  26  * usefull for outgoing call's with more then one isdn-card.
  27  *
  28  * Switchable support to dont reset the hangup-timeout for
  29  * receive frames. Most part's of the timru-rules for receiving frames
  30  * are now obsolete. If the input- or forwarding-firewall deny
  31  * the frame, the line will be not hold open.
  32  *
  33  * Revision 1.80  1999/10/26 21:09:29  armin
  34  * New bufferlen for phonenumber only with kernel 2.3.x
  35  *
  36  * Revision 1.79  1999/10/16 17:52:38  keil
  37  * Changing the MSN length need new data versions
  38  *
  39  * Revision 1.78  1999/10/08 18:59:33  armin
  40  * Bugfix of too small MSN buffer and checking phone number
  41  * in isdn_tty_getdial()
  42  *
  43  * Revision 1.77  1999/09/23 22:22:42  detabc
  44  * added tcp-keepalive-detect with local response (ipv4 only)
  45  * added host-only-interface support
  46  * (source ipaddr == interface ipaddr) (ipv4 only)
  47  * ok with kernel 2.3.18 and 2.2.12
  48  *
  49  * Revision 1.76  1999/09/14 10:16:21  keil
  50  * change ABC include
  51  *
  52  * Revision 1.75  1999/09/13 23:25:17  he
  53  * serialized xmitting frames from isdn_ppp and BSENT statcallb
  54  *
  55  * Revision 1.74  1999/09/12 16:19:39  detabc
  56  * added abc features
  57  * low cost routing for net-interfaces (only the HL side).
  58  * need more implementation in the isdnlog-utility
  59  * udp info support (first part).
  60  * different EAZ on outgoing call's.
  61  * more checks on D-Channel callbacks (double use of channels).
  62  * tested and running with kernel 2.3.17
  63  *
  64  * Revision 1.73  1999/09/06 07:29:36  fritz
  65  * Changed my mail-address.
  66  *
  67  * Revision 1.72  1999/09/04 22:20:19  detabc
  68  *
  69  * Revision 1.71  1999/08/23 15:54:22  keil
  70  * more backported changes from kernel 2.3.14
  71  *
  72  * Revision 1.70  1999/07/31 12:59:58  armin
  73  * Added tty fax capabilities.
  74  *
  75  * Revision 1.69  1999/07/13 20:47:53  werner
  76  * added channel bit ISDN_USAGE_DISABLED for limiting b-channel access.
  77  *
  78  * Revision 1.68  1999/07/11 17:07:37  armin
  79  * Added tty modem register S23.
  80  * Added new layer 2 and 3 protocols for Fax and DSP functions.
  81  *
  82  * Revision 1.67  1999/07/07 10:17:24  detabc
  83  * remove unused messages
  84  *
  85  * Revision 1.66  1999/07/01 08:35:37  keil
  86  * compatibility to 2.3
  87  *
  88  * Revision 1.65  1999/06/10 11:51:27  paul
  89  * fixed comment for NET_DV
  90  *
  91  * Revision 1.64  1999/04/18 14:57:14  fritz
  92  * Removed TIMRU stuff
  93  *
  94  * Revision 1.63  1999/04/18 14:07:18  fritz
  95  * Removed TIMRU stuff.
  96  *
  97  * Revision 1.62  1999/04/12 13:16:54  fritz
  98  * Changes from 2.0 tree.
  99  *
 100  * Revision 1.61  1999/03/02 11:43:21  armin
 101  * Added variable to store connect-message of Modem.
 102  * Added Timer-define for RegS7 (Wait for Carrier).
 103  *
 104  * Revision 1.60  1998/10/25 14:50:29  fritz
 105  * Backported from MIPS (Cobalt).
 106  *
 107  * Revision 1.59  1998/10/23 10:18:55  paul
 108  * Implementation of "dialmode" (successor of "status")
 109  * You also need current isdnctrl for this!
 110  *
 111  * Revision 1.58  1998/10/23 10:10:06  fritz
 112  * Test-Checkin
 113  *
 114  * Revision 1.57  1998/08/31 21:10:01  he
 115  * new ioctl IIOCNETGPN for /dev/isdninfo (get network interface'
 116  *     peer phone number)
 117  *
 118  * Revision 1.56  1998/07/26 18:46:52  armin
 119  * Added silence detection in voice receive mode.
 120  *
 121  * Revision 1.55  1998/06/26 15:13:17  fritz
 122  * Added handling of STAT_ICALL with incomplete CPN.
 123  * Added AT&L for ttyI emulator.
 124  * Added more locking stuff in tty_write.
 125  *
 126  * Revision 1.54  1998/06/18 23:32:01  fritz
 127  * Replaced cli()/restore_flags() in isdn_tty_write() by locking.
 128  * Removed direct-senddown feature in isdn_tty_write because it will
 129  * never succeed with locking and is useless anyway.
 130  *
 131  * Revision 1.53  1998/06/17 19:51:51  he
 132  * merged with 2.1.10[34] (cosmetics and udelay() -> mdelay())
 133  * brute force fix to avoid Ugh's in isdn_tty_write()
 134  * cleaned up some dead code
 135  *
 136  * Revision 1.46  1998/04/14 16:28:59  he
 137  * Fixed user space access with interrupts off and remaining
 138  * copy_{to,from}_user() -> -EFAULT return codes
 139  *
 140  * Revision 1.45  1998/03/24 16:33:12  hipp
 141  * More CCP changes. BSD compression now "works" on a local loopback link.
 142  * Moved some isdn_ppp stuff from isdn.h to isdn_ppp.h
 143  *
 144  * Revision 1.44  1998/03/22 18:50:56  hipp
 145  * Added BSD Compression for syncPPP .. UNTESTED at the moment
 146  *
 147  * Revision 1.43  1998/03/09 17:46:44  he
 148  * merged in 2.1.89 changes
 149  *
 150  *
 151  * Revision 1.40  1998/03/08 01:08:29  fritz
 152  * Increased NET_DV because of TIMRU
 153  *
 154  * Revision 1.39  1998/03/07 22:42:49  fritz
 155  * Starting generic module support (Nothing usable yet).
 156  *
 157  * Revision 1.38  1998/03/07 18:21:29  cal
 158  * Dynamic Timeout-Rule-Handling vs. 971110 included
 159  *
 160  * Revision 1.37  1998/02/22 19:45:24  fritz
 161  * Some changes regarding V.110
 162  *
 163  * Revision 1.36  1998/02/20 17:35:55  fritz
 164  * Added V.110 stuff.
 165  *
 166  * Revision 1.35  1998/01/31 22:14:14  keil
 167  * changes for 2.1.82
 168  *
 169  * Revision 1.34  1997/10/09 21:28:11  fritz
 170  * New HL<->LL interface:
 171  *   New BSENT callback with nr. of bytes included.
 172  *   Sending without ACK.
 173  *   New L1 error status (not yet in use).
 174  *   Cleaned up obsolete structures.
 175  * Implemented Cisco-SLARP.
 176  * Changed local net-interface data to be dynamically allocated.
 177  * Removed old 2.0 compatibility stuff.
 178  *
 179  * Revision 1.33  1997/08/21 14:44:22  fritz
 180  * Moved triggercps to end of struct for backwards-compatibility.
 181  *
 182  * Revision 1.32  1997/08/21 09:49:46  fritz
 183  * Increased NET_DV
 184  *
 185  * Revision 1.31  1997/06/22 11:57:07  fritz
 186  * Added ability to adjust slave triggerlevel.
 187  *
 188  * Revision 1.30  1997/06/17 13:07:23  hipp
 189  * compression changes , MP changes
 190  *
 191  * Revision 1.29  1997/05/27 15:18:02  fritz
 192  * Added changes for recent 2.1.x kernels:
 193  *   changed return type of isdn_close
 194  *   queue_task_* -> queue_task
 195  *   clear/set_bit -> test_and_... where apropriate.
 196  *   changed type of hard_header_cache parameter.
 197  *
 198  * Revision 1.28  1997/03/07 01:33:01  fritz
 199  * Added proper ifdef's for CONFIG_ISDN_AUDIO
 200  *
 201  * Revision 1.27  1997/03/05 21:11:49  fritz
 202  * Minor fixes.
 203  *
 204  * Revision 1.26  1997/02/28 02:37:53  fritz
 205  * Added some comments.
 206  *
 207  * Revision 1.25  1997/02/23 16:54:23  hipp
 208  * some initial changes for future PPP compresion
 209  *
 210  * Revision 1.24  1997/02/18 09:42:45  fritz
 211  * Bugfix: Increased ISDN_MODEM_ANZREG.
 212  * Increased TTY_DV.
 213  *
 214  * Revision 1.23  1997/02/10 22:07:13  fritz
 215  * Added 2 modem registers for numbering plan and screening info.
 216  *
 217  * Revision 1.22  1997/02/03 23:42:08  fritz
 218  * Added ISDN_TIMER_RINGING
 219  * Misc. changes for Kernel 2.1.X compatibility
 220  *
 221  * Revision 1.21  1997/01/17 01:19:10  fritz
 222  * Applied chargeint patch.
 223  *
 224  * Revision 1.20  1997/01/17 00:41:19  fritz
 225  * Increased TTY_DV.
 226  *
 227  * Revision 1.19  1997/01/14 01:41:07  fritz
 228  * Added ATI2 related variables.
 229  * Added variables for audio support in skbuffs.
 230  *
 231  * Revision 1.18  1996/11/06 17:37:50  keil
 232  * more changes for 2.1.X
 233  *
 234  * Revision 1.17  1996/09/07 12:53:57  hipp
 235  * moved a few isdn_ppp.c specific defines to drives/isdn/isdn_ppp.h
 236  *
 237  * Revision 1.16  1996/08/12 16:20:56  hipp
 238  * renamed ppp_minor to ppp_slot
 239  *
 240  * Revision 1.15  1996/06/15 14:56:57  fritz
 241  * Added version signatures for data structures used
 242  * by userlevel programs.
 243  *
 244  * Revision 1.14  1996/06/06 21:24:23  fritz
 245  * Started adding support for suspend/resume.
 246  *
 247  * Revision 1.13  1996/06/05 02:18:20  fritz
 248  * Added DTMF decoding stuff.
 249  *
 250  * Revision 1.12  1996/06/03 19:55:08  fritz
 251  * Fixed typos.
 252  *
 253  * Revision 1.11  1996/05/31 01:37:47  fritz
 254  * Minor changes, due to changes in isdn_tty.c
 255  *
 256  * Revision 1.10  1996/05/18 01:37:18  fritz
 257  * Added spelling corrections and some minor changes
 258  * to stay in sync with kernel.
 259  *
 260  * Revision 1.9  1996/05/17 03:58:20  fritz
 261  * Added flags for DLE handling.
 262  *
 263  * Revision 1.8  1996/05/11 21:49:55  fritz
 264  * Removed queue management variables.
 265  * Changed queue management to use sk_buffs.
 266  *
 267  * Revision 1.7  1996/05/07 09:10:06  fritz
 268  * Reorganized tty-related structs.
 269  *
 270  * Revision 1.6  1996/05/06 11:38:27  hipp
 271  * minor change in ippp struct
 272  *
 273  * Revision 1.5  1996/04/30 11:03:16  fritz
 274  * Added Michael's ippp-bind patch.
 275  *
 276  * Revision 1.4  1996/04/29 23:00:02  fritz
 277  * Added variables for voice-support.
 278  *
 279  * Revision 1.3  1996/04/20 16:54:58  fritz
 280  * Increased maximum number of channels.
 281  * Added some flags for isdn_net to handle callback more reliable.
 282  * Fixed delay-definitions to be more accurate.
 283  * Misc. typos
 284  *
 285  * Revision 1.2  1996/02/11 02:10:02  fritz
 286  * Changed IOCTL-names
 287  * Added rx_netdev, st_netdev, first_skb, org_hcb, and org_hcu to
 288  * Netdevice-local struct.
 289  *
 290  * Revision 1.1  1996/01/10 20:55:07  fritz
 291  * Initial revision
 292  *
 293  */
 294
 295 #ifndef isdn_h
 296 #define isdn_h
 297
 298 #include <linux/config.h>
 299 #include <linux/ioctl.h>
 300
 301 #define ISDN_TTY_MAJOR    43
 302 #define ISDN_TTYAUX_MAJOR 44
 303 #define ISDN_MAJOR        45
 304
 305 /* The minor-devicenumbers for Channel 0 and 1 are used as arguments for
 306  * physical Channel-Mapping, so they MUST NOT be changed without changing
 307  * the correspondent code in isdn.c
 308  */
 309
 310 #ifdef CONFIG_COBALT_MICRO_SERVER
 311 /* Save memory */
 312 #define ISDN_MAX_DRIVERS    2
 313 #define ISDN_MAX_CHANNELS   8
 314 #else
 315 #define ISDN_MAX_DRIVERS    32
 316 #define ISDN_MAX_CHANNELS   64
 317 #endif
 318 #define ISDN_MINOR_B        0
 319 #define ISDN_MINOR_BMAX     (ISDN_MAX_CHANNELS-1)
 320 #define ISDN_MINOR_CTRL     64
 321 #define ISDN_MINOR_CTRLMAX  (64 + (ISDN_MAX_CHANNELS-1))
 322 #define ISDN_MINOR_PPP      128
 323 #define ISDN_MINOR_PPPMAX   (128 + (ISDN_MAX_CHANNELS-1))
 324 #define ISDN_MINOR_STATUS   255
 325
 326 #undef CONFIG_ISDN_WITH_ABC_CALLB
 327 #undef CONFIG_ISDN_WITH_ABC_UDP_CHECK
 328 #undef CONFIG_ISDN_WITH_ABC_UDP_CHECK_HANGUP
 329 #undef CONFIG_ISDN_WITH_ABC_UDP_CHECK_DIAL
 330 #undef CONFIG_ISDN_WITH_ABC_OUTGOING_EAZ
 331 #undef CONFIG_ISDN_WITH_ABC_LCR_SUPPORT
 332 #undef CONFIG_ISDN_WITH_ABC_IPV4_TCP_KEEPALIVE
 333 #undef CONFIG_ISDN_WITH_ABC_IPV4_DYNADDR
 334 #undef CONFIG_ISDN_WITH_ABC_RCV_NO_HUPTIMER
 335 #undef CONFIG_ISDN_WITH_ABC_ICALL_BIND
 336
 337
 338 /* New ioctl-codes */
 339 #define IIOCNETAIF  _IO('I',1)
 340 #define IIOCNETDIF  _IO('I',2)
 341 #define IIOCNETSCF  _IO('I',3)
 342 #define IIOCNETGCF  _IO('I',4)
 343 #define IIOCNETANM  _IO('I',5)
 344 #define IIOCNETDNM  _IO('I',6)
 345 #define IIOCNETGNM  _IO('I',7)
 346 #define IIOCGETSET  _IO('I',8) /* no longer supported */
 347 #define IIOCSETSET  _IO('I',9) /* no longer supported */
 348 #define IIOCSETVER  _IO('I',10)
 349 #define IIOCNETHUP  _IO('I',11)
 350 #define IIOCSETGST  _IO('I',12)
 351 #define IIOCSETBRJ  _IO('I',13)
 352 #define IIOCSIGPRF  _IO('I',14)
 353 #define IIOCGETPRF  _IO('I',15)
 354 #define IIOCSETPRF  _IO('I',16)
 355 #define IIOCGETMAP  _IO('I',17)
 356 #define IIOCSETMAP  _IO('I',18)
 357 #define IIOCNETASL  _IO('I',19)
 358 #define IIOCNETDIL  _IO('I',20)
 359 #define IIOCGETCPS  _IO('I',21)
 360 #define IIOCGETDVR  _IO('I',22)
 361 #define IIOCNETLCR  _IO('I',23) /* dwabc ioctl for LCR from isdnlog */
 362
 363 #define IIOCNETALN  _IO('I',32)
 364 #define IIOCNETDLN  _IO('I',33)
 365
 366 #define IIOCNETGPN  _IO('I',34)
 367
 368 #define IIOCDBGVAR  _IO('I',127)
 369
 370 #define IIOCDRVCTL  _IO('I',128)
 371
 372 /* Packet encapsulations for net-interfaces */
 373 #define ISDN_NET_ENCAP_ETHER      0
 374 #define ISDN_NET_ENCAP_RAWIP      1
 375 #define ISDN_NET_ENCAP_IPTYP      2
 376 #define ISDN_NET_ENCAP_CISCOHDLC  3 /* Without SLARP and keepalive */
 377 #define ISDN_NET_ENCAP_SYNCPPP    4
 378 #define ISDN_NET_ENCAP_UIHDLC     5
 379 #define ISDN_NET_ENCAP_CISCOHDLCK 6 /* With SLARP and keepalive    */
 380 #define ISDN_NET_ENCAP_X25IFACE   7 /* Documentation/networking/x25-iface.txt*/
 381 #define ISDN_NET_ENCAP_MAX_ENCAP  ISDN_NET_ENCAP_X25IFACE
 382 /* Facility which currently uses an ISDN-channel */
 383 #define ISDN_USAGE_NONE       0
 384 #define ISDN_USAGE_RAW        1
 385 #define ISDN_USAGE_MODEM      2
 386 #define ISDN_USAGE_NET        3
 387 #define ISDN_USAGE_VOICE      4
 388 #define ISDN_USAGE_FAX        5
 389 #define ISDN_USAGE_MASK       7 /* Mask to get plain usage */
 390 #define ISDN_USAGE_DISABLED  32 /* This bit is set, if channel is disabled */
 391 #define ISDN_USAGE_EXCLUSIVE 64 /* This bit is set, if channel is exclusive */
 392 #define ISDN_USAGE_OUTGOING 128 /* This bit is set, if channel is outgoing  */
 393
 394 #define ISDN_MODEM_ANZREG    24        /* Number of Modem-Registers        */
 395 #define ISDN_LMSNLEN         255 /* Length of tty's Listen-MSN string */
 396 #define ISDN_CMSGLEN         50  /* Length of CONNECT-Message to add for Modem */
 397
 398 #define ISDN_MSNLEN          32
 399 #define NET_DV 0x06  /* Data version for isdn_net_ioctl_cfg   */
 400 #define TTY_DV 0x06  /* Data version for iprofd etc.          */
 401
 402 #define INF_DV 0x01  /* Data version for /dev/isdninfo        */
 403
 404 typedef struct {
 405   char drvid[25];
 406   unsigned long arg;
 407 } isdn_ioctl_struct;
 408
 409 typedef struct {
 410   unsigned long isdndev;
 411   unsigned long atmodem[ISDN_MAX_CHANNELS];
 412   unsigned long info[ISDN_MAX_CHANNELS];
 413 } debugvar_addr;
 414
 415 typedef struct {
 416   char name[10];
 417   char phone[ISDN_MSNLEN];
 418   int  outgoing;
 419 } isdn_net_ioctl_phone;
 420
 421 typedef struct {
 422   char name[10];     /* Name of interface                     */
 423   char master[10];   /* Name of Master for Bundling           */
 424   char slave[10];    /* Name of Slave for Bundling            */
 425   char eaz[256];     /* EAZ/MSN                               */
 426   char drvid[25];    /* DriverId for Bindings                 */
 427   int  onhtime;      /* Hangup-Timeout                        */
 428   int  charge;       /* Charge-Units                          */
 429   int  l2_proto;     /* Layer-2 protocol                      */
 430   int  l3_proto;     /* Layer-3 protocol                      */
 431   int  p_encap;      /* Encapsulation                         */
 432   int  exclusive;    /* Channel, if bound exclusive           */
 433   int  dialmax;      /* Dial Retry-Counter                    */
 434   int  slavedelay;   /* Delay until slave starts up           */
 435   int  cbdelay;      /* Delay before Callback                 */
 436   int  chargehup;    /* Flag: Charge-Hangup                   */
 437   int  ihup;         /* Flag: Hangup-Timeout on incoming line */
 438   int  secure;       /* Flag: Secure                          */
 439   int  callback;     /* Flag: Callback                        */
 440   int  cbhup;        /* Flag: Reject Call before Callback     */
 441   int  pppbind;      /* ippp device for bindings              */
 442   int  chargeint;    /* Use fixed charge interval length      */
 443   int  triggercps;   /* BogoCPS needed for triggering slave   */
 444   int  dialtimeout;  /* Dial-Timeout                          */
 445   int  dialwait;     /* Time to wait after failed dial        */
 446   int  dialmode;     /* Flag: off / on / auto                 */
 447 } isdn_net_ioctl_cfg;
 448
 449 #define ISDN_NET_DIALMODE_MASK 0xC0  /* bits for status                   */
 450 #define  ISDN_NET_DM_OFF        0x00    /* this interface is stopped      */
 451 #define  ISDN_NET_DM_MANUAL     0x40    /* this interface is on (manual)  */
 452 #define  ISDN_NET_DM_AUTO       0x80    /* this interface is autodial     */
 453 #define ISDN_NET_DIALMODE(x) ((&(x))->flags & ISDN_NET_DIALMODE_MASK)
 454
 455 #ifdef __KERNEL__
 456
 457 #include <linux/errno.h>
 458 #include <linux/fs.h>
 459 #include <linux/major.h>
 460 #include <asm/segment.h>
 461 #include <asm/io.h>
 462 #include <linux/kernel.h>
 463 #include <linux/signal.h>
 464 #include <linux/malloc.h>
 465 #include <linux/timer.h>
 466 #include <linux/wait.h>
 467 #include <linux/tty.h>
 468 #include <linux/tty_flip.h>
 469 #include <linux/serial_reg.h>
 470 #include <linux/fcntl.h>
 471 #include <linux/types.h>
 472 #include <linux/interrupt.h>
 473 #include <linux/ip.h>
 474 #include <linux/in.h>
 475 #include <linux/netdevice.h>
 476 #include <linux/etherdevice.h>
 477 #include <linux/skbuff.h>
 478 #include <linux/tcp.h>
 479
 480 #ifdef CONFIG_ISDN_PPP
 481
 482 #ifdef CONFIG_ISDN_PPP_VJ
 483 #  include <net/slhc_vj.h>
 484 #endif
 485
 486 #include <linux/ppp_defs.h>
 487 #include <linux/if_ppp.h>
 488 #include <linux/if_pppvar.h>
 489
 490 #include <linux/isdn_ppp.h>
 491 #endif
 492
 493 #ifdef CONFIG_ISDN_X25
 494 #  include <linux/concap.h>
 495 #endif
 496
 497 #include <linux/isdnif.h>
 498
 499 #define ISDN_DRVIOCTL_MASK       0x7f  /* Mask for Device-ioctl */
 500
 501 /* Until now unused */
 502 #define ISDN_SERVICE_VOICE 1
 503 #define ISDN_SERVICE_AB    1<<1
 504 #define ISDN_SERVICE_X21   1<<2
 505 #define ISDN_SERVICE_G4    1<<3
 506 #define ISDN_SERVICE_BTX   1<<4
 507 #define ISDN_SERVICE_DFUE  1<<5
 508 #define ISDN_SERVICE_X25   1<<6
 509 #define ISDN_SERVICE_TTX   1<<7
 510 #define ISDN_SERVICE_MIXED 1<<8
 511 #define ISDN_SERVICE_FW    1<<9
 512 #define ISDN_SERVICE_GTEL  1<<10
 513 #define ISDN_SERVICE_BTXN  1<<11
 514 #define ISDN_SERVICE_BTEL  1<<12
 515
 516 /* Macros checking plain usage */
 517 #define USG_NONE(x)         ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NONE)
 518 #define USG_RAW(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_RAW)
 519 #define USG_MODEM(x)        ((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM)
 520 #define USG_VOICE(x)        ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)
 521 #define USG_NET(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NET)
 522 #define USG_FAX(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_FAX)
 523 #define USG_OUTGOING(x)     ((x & ISDN_USAGE_OUTGOING)==ISDN_USAGE_OUTGOING)
 524 #define USG_MODEMORVOICE(x) (((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM) || \
 525                              ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)     )
 526
 527 /* Timer-delays and scheduling-flags */
 528 #define ISDN_TIMER_RES         3                         /* Main Timer-Resolution   */
 529 #define ISDN_TIMER_02SEC       (HZ/(ISDN_TIMER_RES+1)/5) /* Slow-Timer1 .2 sec      */
 530 #define ISDN_TIMER_1SEC        (HZ/(ISDN_TIMER_RES+1))   /* Slow-Timer2 1 sec       */
 531 #define ISDN_TIMER_RINGING     5 /* tty RINGs = ISDN_TIMER_1SEC * this factor       */
 532 #define ISDN_TIMER_KEEPINT    10 /* Cisco-Keepalive = ISDN_TIMER_1SEC * this factor */
 533 #define ISDN_TIMER_MODEMREAD   1
 534 #define ISDN_TIMER_MODEMPLUS   2
 535 #define ISDN_TIMER_MODEMRING   4
 536 #define ISDN_TIMER_MODEMXMIT   8
 537 #define ISDN_TIMER_NETDIAL    16
 538 #define ISDN_TIMER_NETHANGUP  32
 539 #define ISDN_TIMER_IPPP       64
 540 #define ISDN_TIMER_KEEPALIVE 128 /* Cisco-Keepalive */
 541 #define ISDN_TIMER_CARRIER   256 /* Wait for Carrier */
 542 #define ISDN_TIMER_FAST      (ISDN_TIMER_MODEMREAD | ISDN_TIMER_MODEMPLUS | \
 543                               ISDN_TIMER_MODEMXMIT)
 544 #define ISDN_TIMER_SLOW      (ISDN_TIMER_MODEMRING | ISDN_TIMER_NETHANGUP | \
 545                               ISDN_TIMER_NETDIAL | ISDN_TIMER_KEEPALIVE | \
 546                               ISDN_TIMER_CARRIER)
 547
 548 /* Timeout-Values for isdn_net_dial() */
 549 #define ISDN_TIMER_DTIMEOUT10 (10*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
 550 #define ISDN_TIMER_DTIMEOUT15 (15*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
 551 #define ISDN_TIMER_DTIMEOUT60 (60*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
 552
 553 /* GLOBAL_FLAGS */
 554 #define ISDN_GLOBAL_STOPPED 1
 555
 556 /*=================== Start of ip-over-ISDN stuff =========================*/
 557
 558 /* Feature- and status-flags for a net-interface */
 559 #define ISDN_NET_CONNECTED  0x01       /* Bound to ISDN-Channel             */
 560 #define ISDN_NET_SECURE     0x02       /* Accept calls from phonelist only  */
 561 #define ISDN_NET_CALLBACK   0x04       /* activate callback                 */
 562 #define ISDN_NET_CBHUP      0x08       /* hangup before callback            */
 563 #define ISDN_NET_CBOUT      0x10       /* remote machine does callback      */
 564
 565 #define ISDN_NET_MAGIC      0x49344C02 /* for paranoia-checking             */
 566
 567 /* Phone-list-element */
 568 typedef struct {
 569   void *next;
 570   char num[ISDN_MSNLEN];
 571 } isdn_net_phone;
 572
 573 /*
 574    Principles when extending structures for generic encapsulation protocol
 575    ("concap") support:
 576    - Stuff which is hardware specific (here i4l-specific) goes in
 577      the netdev -> local structure (here: isdn_net_local)
 578    - Stuff which is encapsulation protocol specific goes in the structure
 579      which holds the linux device structure (here: isdn_net_device)
 580 */
 581
 582 /* Local interface-data */
 583 typedef struct isdn_net_local_s {
 584   ulong                  magic;
 585   char                   name[10];     /* Name of device                   */
 586   struct enet_statistics stats;        /* Ethernet Statistics              */
 587   int                    isdn_device;  /* Index to isdn-device             */
 588   int                    isdn_channel; /* Index to isdn-channel            */
 589   int                    ppp_slot;     /* PPPD device slot number          */
 590   int                    pre_device;   /* Preselected isdn-device          */
 591   int                    pre_channel;  /* Preselected isdn-channel         */
 592   int                    exclusive;    /* If non-zero idx to reserved chan.*/
 593   int                    flags;        /* Connection-flags                 */
 594   int                    dialretry;    /* Counter for Dialout-retries      */
 595   int                    dialmax;      /* Max. Number of Dial-retries      */
 596   int                    cbdelay;      /* Delay before Callback starts     */
 597   int                    dtimer;       /* Timeout-counter for dialing      */
 598   char                   msn[ISDN_MSNLEN]; /* MSNs/EAZs for this interface */
 599   u_char                 cbhup;        /* Flag: Reject Call before Callback*/
 600   u_char                 dialstate;    /* State for dialing                */
 601   u_char                 p_encap;      /* Packet encapsulation             */
 602                                        /*   0 = Ethernet over ISDN         */
 603                                        /*   1 = RAW-IP                     */
 604                                        /*   2 = IP with type field         */
 605   u_char                 l2_proto;     /* Layer-2-protocol                 */
 606                                        /* See ISDN_PROTO_L2..-constants in */
 607                                        /* isdnif.h                         */
 608                                        /*   0 = X75/LAPB with I-Frames     */
 609                                        /*   1 = X75/LAPB with UI-Frames    */
 610                                        /*   2 = X75/LAPB with BUI-Frames   */
 611                                        /*   3 = HDLC                       */
 612   u_char                 l3_proto;     /* Layer-3-protocol                 */
 613                                        /* See ISDN_PROTO_L3..-constants in */
 614                                        /* isdnif.h                         */
 615                                        /*   0 = Transparent                */
 616   int                    huptimer;     /* Timeout-counter for auto-hangup  */
 617   int                    charge;       /* Counter for charging units       */
 618   int                    chargetime;   /* Timer for Charging info          */
 619   int                    hupflags;     /* Flags for charge-unit-hangup:    */
 620                                        /* bit0: chargeint is invalid       */
 621                                        /* bit1: Getting charge-interval    */
 622                                        /* bit2: Do charge-unit-hangup      */
 623                                        /* bit3: Do hangup even on incoming */
 624   int                    outgoing;     /* Flag: outgoing call              */
 625   int                    onhtime;      /* Time to keep link up             */
 626   int                    chargeint;    /* Interval between charge-infos    */
 627   int                    onum;         /* Flag: at least 1 outgoing number */
 628   int                    cps;          /* current speed of this interface  */
 629   int                    transcount;   /* byte-counter for cps-calculation */
 630   int                    sqfull;       /* Flag: netdev-queue overloaded    */
 631   ulong                  sqfull_stamp; /* Start-Time of overload           */
 632   ulong                  slavedelay;   /* Dynamic bundling delaytime       */
 633   int                    triggercps;   /* BogoCPS needed for trigger slave */
 634   struct net_device      *srobin;      /* Ptr to Master device for slaves  */
 635   isdn_net_phone         *phone[2];    /* List of remote-phonenumbers      */
 636                                        /* phone[0] = Incoming Numbers      */
 637                                        /* phone[1] = Outgoing Numbers      */
 638   isdn_net_phone         *dial;        /* Pointer to dialed number         */
 639   struct net_device      *master;      /* Ptr to Master device for slaves  */
 640   struct net_device      *slave;       /* Ptr to Slave device for masters  */
 641   struct isdn_net_local_s *next;       /* Ptr to next link in bundle       */
 642   struct isdn_net_local_s *last;       /* Ptr to last link in bundle       */
 643   struct isdn_net_dev_s  *netdev;      /* Ptr to netdev                    */
 644   struct sk_buff         *first_skb;   /* Ptr to skb that triggers dialing */
 645   struct sk_buff *volatile sav_skb;    /* Ptr to skb, rejected by LL-driver*/
 646                                        /* Ptr to orig. hard_header_cache   */
 647   int                    (*org_hhc)(
 648                                     struct neighbour *neigh,
 649                                     struct hh_cache *hh);
 650                                        /* Ptr to orig. header_cache_update */
 651   void                   (*org_hcu)(struct hh_cache *,
 652                                     struct net_device *,
 653                                     unsigned char *);
 654   int  pppbind;                        /* ippp device for bindings         */
 655   int                                   dialtimeout;    /* How long shall we try on dialing? (jiffies) */
 656   int                                   dialwait;               /* How long shall we wait after failed attempt? (jiffies) */
 657   ulong                                 dialstarted;    /* jiffies of first dialing-attempt */
 658   ulong                                 dialwait_timer; /* jiffies of earliest next dialing-attempt */
 659   int                                   huptimeout;             /* How long will the connection be up? (seconds) */
 660 #ifdef CONFIG_ISDN_X25
 661   struct concap_device_ops *dops;      /* callbacks used by encapsulator   */
 662 #endif
 663   int  cisco_loop;                     /* Loop counter for Cisco-SLARP     */
 664   ulong cisco_myseq;                   /* Local keepalive seq. for Cisco   */
 665   ulong cisco_yourseq;                 /* Remote keepalive seq. for Cisco  */
 666 } isdn_net_local;
 667
 668 /* the interface itself */
 669 typedef struct isdn_net_dev_s {
 670   isdn_net_local *local;
 671   isdn_net_local *queue;
 672   void           *next;                /* Pointer to next isdn-interface   */
 673   struct net_device dev;               /* interface to upper levels        */
 674 #ifdef CONFIG_ISDN_PPP
 675   struct mpqueue *mp_last;
 676   struct ippp_bundle ib;
 677 #endif
 678 #ifdef CONFIG_ISDN_X25
 679   struct concap_proto  *cprot; /* connection oriented encapsulation protocol */
 680 #endif
 681
 682 } isdn_net_dev;
 683
 684 /*===================== End of ip-over-ISDN stuff ===========================*/
 685
 686 /*======================= Start of ISDN-tty stuff ===========================*/
 687
 688 #define ISDN_ASYNC_MAGIC          0x49344C01 /* for paranoia-checking        */
 689 #define ISDN_ASYNC_INITIALIZED    0x80000000 /* port was initialized         */
 690 #define ISDN_ASYNC_CALLOUT_ACTIVE 0x40000000 /* Call out device active       */
 691 #define ISDN_ASYNC_NORMAL_ACTIVE  0x20000000 /* Normal device active         */
 692 #define ISDN_ASYNC_CLOSING        0x08000000 /* Serial port is closing       */
 693 #define ISDN_ASYNC_CTS_FLOW       0x04000000 /* Do CTS flow control          */
 694 #define ISDN_ASYNC_CHECK_CD       0x02000000 /* i.e., CLOCAL                 */
 695 #define ISDN_ASYNC_HUP_NOTIFY         0x0001 /* Notify tty on hangups/closes */
 696 #define ISDN_ASYNC_SESSION_LOCKOUT    0x0100 /* Lock cua opens on session    */
 697 #define ISDN_ASYNC_PGRP_LOCKOUT       0x0200 /* Lock cua opens on pgrp       */
 698 #define ISDN_ASYNC_CALLOUT_NOHUP      0x0400 /* No hangup for cui            */
 699 #define ISDN_ASYNC_SPLIT_TERMIOS      0x0008 /* Sep. termios for dialin/out  */
 700 #define ISDN_SERIAL_XMIT_SIZE           1024 /* Default bufsize for write    */
 701 #define ISDN_SERIAL_XMIT_MAX            4000 /* Maximum bufsize for write    */
 702 #define ISDN_SERIAL_TYPE_NORMAL            1
 703 #define ISDN_SERIAL_TYPE_CALLOUT           2
 704
 705 #ifdef CONFIG_ISDN_AUDIO
 706 /* For using sk_buffs with audio we need some private variables
 707  * within each sk_buff. For this purpose, we declare a struct here,
 708  * and put it always at skb->head. A few macros help accessing the
 709  * variables. Of course, we need to check skb_headroom prior to
 710  * any access.
 711  */
 712 typedef struct isdn_audio_skb {
 713   unsigned short dle_count;
 714   unsigned char  lock;
 715 } isdn_audio_skb;
 716
 717 #define ISDN_AUDIO_SKB_DLECOUNT(skb) (((isdn_audio_skb*)skb->head)->dle_count)
 718 #define ISDN_AUDIO_SKB_LOCK(skb) (((isdn_audio_skb*)skb->head)->lock)
 719 #endif
 720
 721 /* Private data of AT-command-interpreter */
 722 typedef struct atemu {
 723         u_char       profile[ISDN_MODEM_ANZREG]; /* Modem-Regs. Profile 0              */
 724         u_char       mdmreg[ISDN_MODEM_ANZREG];  /* Modem-Registers                    */
 725         char         pmsn[ISDN_MSNLEN];          /* EAZ/MSNs Profile 0                 */
 726         char         msn[ISDN_MSNLEN];           /* EAZ/MSN                            */
 727         char         plmsn[ISDN_LMSNLEN];        /* Listening MSNs Profile 0           */
 728         char         lmsn[ISDN_LMSNLEN];         /* Listening MSNs                     */
 729         char         cpn[ISDN_MSNLEN];           /* CalledPartyNumber on incoming call */
 730         char         connmsg[ISDN_CMSGLEN];      /* CONNECT-Msg from HL-Driver         */
 731 #ifdef CONFIG_ISDN_AUDIO
 732         u_char       vpar[10];                   /* Voice-parameters                   */
 733         int          lastDLE;                    /* Flag for voice-coding: DLE seen    */
 734 #endif
 735         int          mdmcmdl;                    /* Length of Modem-Commandbuffer      */
 736         int          pluscount;                  /* Counter for +++ sequence           */
 737         int          lastplus;                   /* Timestamp of last +                */
 738         int          carrierwait;                /* Seconds of carrier waiting         */
 739         char         mdmcmd[255];                /* Modem-Commandbuffer                */
 740         unsigned int charge;                     /* Charge units of current connection */
 741 } atemu;
 742
 743 /* Private data (similar to async_struct in <linux/serial.h>) */
 744 typedef struct modem_info {
 745   int                   magic;
 746   int                   flags;           /* defined in tty.h               */
 747   int                   x_char;          /* xon/xoff character             */
 748   int                   mcr;             /* Modem control register         */
 749   int                   msr;             /* Modem status register          */
 750   int                   lsr;             /* Line status register           */
 751   int                   line;
 752   int                   count;           /* # of fd on device              */
 753   int                   blocked_open;    /* # of blocked opens             */
 754   long                  session;         /* Session of opening process     */
 755   long                  pgrp;            /* pgrp of opening process        */
 756   int                   online;          /* 1 = B-Channel is up, drop data */
 757                                          /* 2 = B-Channel is up, deliver d.*/
 758   int                   dialing;         /* Dial in progress or ATA        */
 759   int                   rcvsched;        /* Receive needs schedule         */
 760   int                   isdn_driver;     /* Index to isdn-driver           */
 761   int                   isdn_channel;    /* Index to isdn-channel          */
 762   int                   drv_index;       /* Index to dev->usage            */
 763   int                   ncarrier;        /* Flag: schedule NO CARRIER      */
 764   unsigned char         last_cause[8];   /* Last cause message             */
 765   unsigned char         last_num[ISDN_MSNLEN];
 766                                          /* Last phone-number              */
 767   unsigned char         last_l2;         /* Last layer-2 protocol          */
 768   unsigned char         last_si;         /* Last service                   */
 769   unsigned char         last_lhup;       /* Last hangup local?             */
 770   unsigned char         last_dir;        /* Last direction (in or out)     */
 771   struct timer_list     nc_timer;        /* Timer for delayed NO CARRIER   */
 772   int                   send_outstanding;/* # of outstanding send-requests */
 773   int                   xmit_size;       /* max. # of chars in xmit_buf    */
 774   int                   xmit_count;      /* # of chars in xmit_buf         */
 775   unsigned char         *xmit_buf;       /* transmit buffer                */
 776   struct sk_buff_head   xmit_queue;      /* transmit queue                 */
 777   atomic_t              xmit_lock;       /* Semaphore for isdn_tty_write   */
 778 #ifdef CONFIG_ISDN_AUDIO
 779   int                   vonline;         /* Voice-channel status           */
 780                                          /* Bit 0 = recording              */
 781                                          /* Bit 1 = playback               */
 782                                          /* Bit 2 = playback, DLE-ETX seen */
 783   struct sk_buff_head   dtmf_queue;      /* queue for dtmf results         */
 784   void                  *adpcms;         /* state for adpcm decompression  */
 785   void                  *adpcmr;         /* state for adpcm compression    */
 786   void                  *dtmf_state;     /* state for dtmf decoder         */
 787   void                  *silence_state;  /* state for silence detection    */
 788 #endif
 789 #ifdef CONFIG_ISDN_TTY_FAX
 790   struct T30_s          *fax;            /* T30 Fax Group 3 data/interface */
 791   int                   faxonline;       /* Fax-channel status             */
 792 #endif
 793   struct tty_struct     *tty;            /* Pointer to corresponding tty   */
 794   atemu                 emu;             /* AT-emulator data               */
 795   struct termios        normal_termios;  /* For saving termios structs     */
 796   struct termios        callout_termios;
 797   wait_queue_head_t     open_wait, close_wait;
 798   struct semaphore      write_sem;
 799 } modem_info;
 800
 801 #define ISDN_MODEM_WINSIZE 8
 802
 803 /* Description of one ISDN-tty */
 804 typedef struct {
 805   int                refcount;                     /* Number of opens        */
 806   struct tty_driver  tty_modem;                    /* tty-device             */
 807   struct tty_driver  cua_modem;                    /* cua-device             */
 808   struct tty_struct  *modem_table[ISDN_MAX_CHANNELS]; /* ?? copied from Orig */
 809   struct termios     *modem_termios[ISDN_MAX_CHANNELS];
 810   struct termios     *modem_termios_locked[ISDN_MAX_CHANNELS];
 811   modem_info         info[ISDN_MAX_CHANNELS];      /* Private data           */
 812 } modem;
 813
 814 /*======================= End of ISDN-tty stuff ============================*/
 815
 816 /*======================== Start of V.110 stuff ============================*/
 817 #define V110_BUFSIZE 1024
 818
 819 typedef struct {
 820         int nbytes;                    /* 1 Matrixbyte -> nbytes in stream     */
 821         int nbits;                     /* Number of used bits in streambyte    */
 822         unsigned char key;             /* Bitmask in stream eg. 11 (nbits=2)   */
 823         int decodelen;                 /* Amount of data in decodebuf          */
 824         int SyncInit;                  /* Number of sync frames to send        */
 825         unsigned char *OnlineFrame;    /* Precalculated V110 idle frame        */
 826         unsigned char *OfflineFrame;   /* Precalculated V110 sync Frame        */
 827         int framelen;                  /* Length of frames                     */
 828         int skbuser;                   /* Number of unacked userdata skbs      */
 829         int skbidle;                   /* Number of unacked idle/sync skbs     */
 830         int introducer;                /* Local vars for decoder               */
 831         int dbit;
 832         unsigned char b;
 833         int skbres;                    /* space to reserve in outgoing skb     */
 834         int maxsize;                   /* maxbufsize of lowlevel driver        */
 835         unsigned char *encodebuf;      /* temporary buffer for encoding        */
 836         unsigned char decodebuf[V110_BUFSIZE]; /* incomplete V110 matrices     */
 837 } isdn_v110_stream;
 838
 839 /*========================= End of V.110 stuff =============================*/
 840
 841 /*======================= Start of general stuff ===========================*/
 842
 843 typedef struct {
 844         char *next;
 845         char *private;
 846 } infostruct;
 847
 848 typedef struct isdn_module {
 849         struct isdn_module *prev;
 850         struct isdn_module *next;
 851         char *name;
 852         int (*get_free_channel)(int, int, int, int, int);
 853         int (*free_channel)(int, int, int);
 854         int (*status_callback)(isdn_ctrl *);
 855         int (*command)(isdn_ctrl *);
 856         int (*receive_callback)(int, int, struct sk_buff *);
 857         int (*writebuf_skb)(int, int, int, struct sk_buff *);
 858         int (*net_start_xmit)(struct sk_buff *, struct net_device *);
 859         int (*net_receive)(struct net_device *, struct sk_buff *);
 860         int (*net_open)(struct net_device *);
 861         int (*net_close)(struct net_device *);
 862         int priority;
 863 } isdn_module;
 864
 865 #define DRV_FLAG_RUNNING 1
 866 #define DRV_FLAG_REJBUS  2
 867 #define DRV_FLAG_LOADED  4
 868
 869 /* Description of hardware-level-driver */
 870 typedef struct {
 871         ulong               online;           /* Channel-Online flags             */
 872         ulong               flags;            /* Misc driver Flags                */
 873         int                 locks;            /* Number of locks for this driver  */
 874         int                 channels;         /* Number of channels               */
 875         wait_queue_head_t   st_waitq;         /* Wait-Queue for status-read's     */
 876         int                 maxbufsize;       /* Maximum Buffersize supported     */
 877         unsigned long       pktcount;         /* Until now: unused                */
 878         int                 stavail;          /* Chars avail on Status-device     */
 879         isdn_if            *interface;        /* Interface to driver              */
 880         int                *rcverr;           /* Error-counters for B-Ch.-receive */
 881         int                *rcvcount;         /* Byte-counters for B-Ch.-receive  */
 882 #ifdef CONFIG_ISDN_AUDIO
 883         unsigned long      DLEflag;           /* Flags: Insert DLE at next read   */
 884 #endif
 885         struct sk_buff_head *rpqueue;         /* Pointers to start of Rcv-Queue   */
 886         wait_queue_head_t  *rcv_waitq;       /* Wait-Queues for B-Channel-Reads  */
 887         wait_queue_head_t  *snd_waitq;       /* Wait-Queue for B-Channel-Send's  */
 888         char               msn2eaz[10][ISDN_MSNLEN];  /* Mapping-Table MSN->EAZ   */
 889 } driver;
 890
 891 /* Main driver-data */
 892 typedef struct isdn_devt {
 893         unsigned short    flags;                       /* Bitmapped Flags:           */
 894         /*                            */
 895         int               drivers;                     /* Current number of drivers  */
 896         int               channels;                    /* Current number of channels */
 897         int               net_verbose;               /* Verbose-Flag               */
 898         int               modempoll;                   /* Flag: tty-read active      */
 899         int               tflags;                    /* Timer-Flags:               */
 900         /*  see ISDN_TIMER_..defines  */
 901         int               global_flags;
 902         infostruct        *infochain;                /* List of open info-devs.    */
 903         wait_queue_head_t info_waitq;               /* Wait-Queue for isdninfo    */
 904         struct timer_list timer;                       /* Misc.-function Timer       */
 905         int               chanmap[ISDN_MAX_CHANNELS];/* Map minor->device-channel  */
 906         int               drvmap[ISDN_MAX_CHANNELS]; /* Map minor->driver-index    */
 907         int               usage[ISDN_MAX_CHANNELS];  /* Used by tty/ip/voice       */
 908         char              num[ISDN_MAX_CHANNELS][ISDN_MSNLEN];
 909         /* Remote number of active ch.*/
 910         int               m_idx[ISDN_MAX_CHANNELS];  /* Index for mdm....          */
 911         driver            *drv[ISDN_MAX_DRIVERS];    /* Array of drivers           */
 912         isdn_net_dev      *netdev;                     /* Linked list of net-if's    */
 913         char              drvid[ISDN_MAX_DRIVERS][20];/* Driver-ID                 */
 914         struct task_struct *profd;                   /* For iprofd                 */
 915         modem             mdm;                 /* tty-driver-data            */
 916         isdn_net_dev      *rx_netdev[ISDN_MAX_CHANNELS]; /* rx netdev-pointers     */
 917         isdn_net_dev      *st_netdev[ISDN_MAX_CHANNELS]; /* stat netdev-pointers   */
 918         ulong             ibytes[ISDN_MAX_CHANNELS]; /* Statistics incoming bytes  */
 919         ulong             obytes[ISDN_MAX_CHANNELS]; /* Statistics outgoing bytes  */
 920         int               v110emu[ISDN_MAX_CHANNELS];/* V.110 emulator-mode 0=none */
 921         atomic_t          v110use[ISDN_MAX_CHANNELS];/* Usage-Semaphore for stream */
 922         isdn_v110_stream  *v110[ISDN_MAX_CHANNELS];  /* V.110 private data         */
 923         struct semaphore  sem;                       /* serialize list access*/
 924         isdn_module       *modules;
 925 } isdn_dev;
 926
 927 extern isdn_dev *dev;
 928
 929
 930
 931 /* Utility-Macros */
 932 #define MIN(a,b) ((a<b)?a:b)
 933 #define MAX(a,b) ((a>b)?a:b)
 934 #endif /* __KERNEL__ */
 935 #endif /* isdn_h */