include/linux/isdn.h

   1 /* $Id: isdn.h,v 1.125.2.3 2004/02/10 01:07:14 keil 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 software may be used and distributed according to the terms
  10  * of the GNU General Public License, incorporated herein by reference.
  11  *
  12  */
  13
  14 #ifndef __ISDN_H__
  15 #define __ISDN_H__
  16
  17 #include <linux/ioctl.h>
  18
  19 #ifdef CONFIG_COBALT_MICRO_SERVER
  20 /* Save memory */
  21 #define ISDN_MAX_DRIVERS    2
  22 #define ISDN_MAX_CHANNELS   8
  23 #else
  24 #define ISDN_MAX_DRIVERS    32
  25 #define ISDN_MAX_CHANNELS   64
  26 #endif
  27
  28 /* New ioctl-codes */
  29 #define IIOCNETAIF  _IO('I',1)
  30 #define IIOCNETDIF  _IO('I',2)
  31 #define IIOCNETSCF  _IO('I',3)
  32 #define IIOCNETGCF  _IO('I',4)
  33 #define IIOCNETANM  _IO('I',5)
  34 #define IIOCNETDNM  _IO('I',6)
  35 #define IIOCNETGNM  _IO('I',7)
  36 #define IIOCGETSET  _IO('I',8) /* no longer supported */
  37 #define IIOCSETSET  _IO('I',9) /* no longer supported */
  38 #define IIOCSETVER  _IO('I',10)
  39 #define IIOCNETHUP  _IO('I',11)
  40 #define IIOCSETGST  _IO('I',12)
  41 #define IIOCSETBRJ  _IO('I',13)
  42 #define IIOCSIGPRF  _IO('I',14)
  43 #define IIOCGETPRF  _IO('I',15)
  44 #define IIOCSETPRF  _IO('I',16)
  45 #define IIOCGETMAP  _IO('I',17)
  46 #define IIOCSETMAP  _IO('I',18)
  47 #define IIOCNETASL  _IO('I',19)
  48 #define IIOCNETDIL  _IO('I',20)
  49 #define IIOCGETCPS  _IO('I',21)
  50 #define IIOCGETDVR  _IO('I',22)
  51 #define IIOCNETLCR  _IO('I',23) /* dwabc ioctl for LCR from isdnlog */
  52 #define IIOCNETDWRSET  _IO('I',24) /* dwabc ioctl to reset abc-values to default on a net-interface */
  53
  54 #define IIOCNETALN  _IO('I',32)
  55 #define IIOCNETDLN  _IO('I',33)
  56
  57 #define IIOCNETGPN  _IO('I',34)
  58
  59 #define IIOCDBGVAR  _IO('I',127)
  60
  61 #define IIOCDRVCTL  _IO('I',128)
  62
  63 /* cisco hdlck device private ioctls */
  64 #define SIOCGKEEPPERIOD (SIOCDEVPRIVATE + 0)
  65 #define SIOCSKEEPPERIOD (SIOCDEVPRIVATE + 1)
  66 #define SIOCGDEBSERINT  (SIOCDEVPRIVATE + 2)
  67 #define SIOCSDEBSERINT  (SIOCDEVPRIVATE + 3)
  68
  69 /* Packet encapsulations for net-interfaces */
  70 #define ISDN_NET_ENCAP_ETHER      0
  71 #define ISDN_NET_ENCAP_RAWIP      1
  72 #define ISDN_NET_ENCAP_IPTYP      2
  73 #define ISDN_NET_ENCAP_CISCOHDLC  3 /* Without SLARP and keepalive */
  74 #define ISDN_NET_ENCAP_SYNCPPP    4
  75 #define ISDN_NET_ENCAP_UIHDLC     5
  76 #define ISDN_NET_ENCAP_CISCOHDLCK 6 /* With SLARP and keepalive    */
  77 #define ISDN_NET_ENCAP_X25IFACE   7 /* Documentation/networking/x25-iface.txt*/
  78 #define ISDN_NET_ENCAP_MAX_ENCAP  ISDN_NET_ENCAP_X25IFACE
  79
  80 /* Facility which currently uses an ISDN-channel */
  81 #define ISDN_USAGE_NONE       0
  82 #define ISDN_USAGE_RAW        1
  83 #define ISDN_USAGE_MODEM      2
  84 #define ISDN_USAGE_NET        3
  85 #define ISDN_USAGE_VOICE      4
  86 #define ISDN_USAGE_FAX        5
  87 #define ISDN_USAGE_MASK       7 /* Mask to get plain usage */
  88 #define ISDN_USAGE_DISABLED  32 /* This bit is set, if channel is disabled */
  89 #define ISDN_USAGE_EXCLUSIVE 64 /* This bit is set, if channel is exclusive */
  90 #define ISDN_USAGE_OUTGOING 128 /* This bit is set, if channel is outgoing  */
  91
  92 #define ISDN_MODEM_NUMREG    24        /* Number of Modem-Registers        */
  93 #define ISDN_LMSNLEN         255 /* Length of tty's Listen-MSN string */
  94 #define ISDN_CMSGLEN         50  /* Length of CONNECT-Message to add for Modem */
  95
  96 #define ISDN_MSNLEN          32
  97 #define NET_DV 0x06  /* Data version for isdn_net_ioctl_cfg   */
  98 #define TTY_DV 0x06  /* Data version for iprofd etc.          */
  99
 100 #define INF_DV 0x01  /* Data version for /dev/isdninfo        */
 101
 102 typedef struct {
 103   char drvid[25];
 104   unsigned long arg;
 105 } isdn_ioctl_struct;
 106
 107 typedef struct {
 108   char name[10];
 109   char phone[ISDN_MSNLEN];
 110   int  outgoing;
 111 } isdn_net_ioctl_phone;
 112
 113 typedef struct {
 114   char name[10];     /* Name of interface                     */
 115   char master[10];   /* Name of Master for Bundling           */
 116   char slave[10];    /* Name of Slave for Bundling            */
 117   char eaz[256];     /* EAZ/MSN                               */
 118   char drvid[25];    /* DriverId for Bindings                 */
 119   int  onhtime;      /* Hangup-Timeout                        */
 120   int  charge;       /* Charge-Units                          */
 121   int  l2_proto;     /* Layer-2 protocol                      */
 122   int  l3_proto;     /* Layer-3 protocol                      */
 123   int  p_encap;      /* Encapsulation                         */
 124   int  exclusive;    /* Channel, if bound exclusive           */
 125   int  dialmax;      /* Dial Retry-Counter                    */
 126   int  slavedelay;   /* Delay until slave starts up           */
 127   int  cbdelay;      /* Delay before Callback                 */
 128   int  chargehup;    /* Flag: Charge-Hangup                   */
 129   int  ihup;         /* Flag: Hangup-Timeout on incoming line */
 130   int  secure;       /* Flag: Secure                          */
 131   int  callback;     /* Flag: Callback                        */
 132   int  cbhup;        /* Flag: Reject Call before Callback     */
 133   int  pppbind;      /* ippp device for bindings              */
 134   int  chargeint;    /* Use fixed charge interval length      */
 135   int  triggercps;   /* BogoCPS needed for triggering slave   */
 136   int  dialtimeout;  /* Dial-Timeout                          */
 137   int  dialwait;     /* Time to wait after failed dial        */
 138   int  dialmode;     /* Flag: off / on / auto                 */
 139 } isdn_net_ioctl_cfg;
 140
 141 #define ISDN_NET_DIALMODE_MASK  0xC0    /* bits for status                */
 142 #define ISDN_NET_DM_OFF         0x00    /* this interface is stopped      */
 143 #define ISDN_NET_DM_MANUAL      0x40    /* this interface is on (manual)  */
 144 #define ISDN_NET_DM_AUTO        0x80    /* this interface is autodial     */
 145 #define ISDN_NET_DIALMODE(x) ((&(x))->flags & ISDN_NET_DIALMODE_MASK)
 146
 147 #ifdef __KERNEL__
 148
 149 #include <linux/config.h>
 150 #include <linux/errno.h>
 151 #include <linux/fs.h>
 152 #include <linux/major.h>
 153 #include <asm/segment.h>
 154 #include <asm/io.h>
 155 #include <linux/kernel.h>
 156 #include <linux/signal.h>
 157 #include <linux/slab.h>
 158 #include <linux/timer.h>
 159 #include <linux/wait.h>
 160 #include <linux/tty.h>
 161 #include <linux/tty_flip.h>
 162 #include <linux/serial_reg.h>
 163 #include <linux/fcntl.h>
 164 #include <linux/types.h>
 165 #include <linux/interrupt.h>
 166 #include <linux/ip.h>
 167 #include <linux/in.h>
 168 #include <linux/netdevice.h>
 169 #include <linux/etherdevice.h>
 170 #include <linux/skbuff.h>
 171 #include <linux/tcp.h>
 172
 173 #define ISDN_TTY_MAJOR    43
 174 #define ISDN_TTYAUX_MAJOR 44
 175 #define ISDN_MAJOR        45
 176
 177 /* The minor-devicenumbers for Channel 0 and 1 are used as arguments for
 178  * physical Channel-Mapping, so they MUST NOT be changed without changing
 179  * the correspondent code in isdn.c
 180  */
 181
 182 #define ISDN_MINOR_B        0
 183 #define ISDN_MINOR_BMAX     (ISDN_MAX_CHANNELS-1)
 184 #define ISDN_MINOR_CTRL     64
 185 #define ISDN_MINOR_CTRLMAX  (64 + (ISDN_MAX_CHANNELS-1))
 186 #define ISDN_MINOR_PPP      128
 187 #define ISDN_MINOR_PPPMAX   (128 + (ISDN_MAX_CHANNELS-1))
 188 #define ISDN_MINOR_STATUS   255
 189
 190 #ifdef CONFIG_ISDN_PPP
 191
 192 #ifdef CONFIG_ISDN_PPP_VJ
 193 #  include <net/slhc_vj.h>
 194 #endif
 195
 196 #include <linux/ppp_defs.h>
 197 #include <linux/if_ppp.h>
 198
 199 #include <linux/isdn_ppp.h>
 200 #endif
 201
 202 #ifdef CONFIG_ISDN_X25
 203 #  include <linux/concap.h>
 204 #endif
 205
 206 #include <linux/isdnif.h>
 207
 208 #define ISDN_DRVIOCTL_MASK       0x7f  /* Mask for Device-ioctl */
 209
 210 /* Until now unused */
 211 #define ISDN_SERVICE_VOICE 1
 212 #define ISDN_SERVICE_AB    1<<1
 213 #define ISDN_SERVICE_X21   1<<2
 214 #define ISDN_SERVICE_G4    1<<3
 215 #define ISDN_SERVICE_BTX   1<<4
 216 #define ISDN_SERVICE_DFUE  1<<5
 217 #define ISDN_SERVICE_X25   1<<6
 218 #define ISDN_SERVICE_TTX   1<<7
 219 #define ISDN_SERVICE_MIXED 1<<8
 220 #define ISDN_SERVICE_FW    1<<9
 221 #define ISDN_SERVICE_GTEL  1<<10
 222 #define ISDN_SERVICE_BTXN  1<<11
 223 #define ISDN_SERVICE_BTEL  1<<12
 224
 225 /* Macros checking plain usage */
 226 #define USG_NONE(x)         ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NONE)
 227 #define USG_RAW(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_RAW)
 228 #define USG_MODEM(x)        ((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM)
 229 #define USG_VOICE(x)        ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)
 230 #define USG_NET(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NET)
 231 #define USG_FAX(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_FAX)
 232 #define USG_OUTGOING(x)     ((x & ISDN_USAGE_OUTGOING)==ISDN_USAGE_OUTGOING)
 233 #define USG_MODEMORVOICE(x) (((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM) || \
 234                              ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)     )
 235
 236 /* Timer-delays and scheduling-flags */
 237 #define ISDN_TIMER_RES         4                         /* Main Timer-Resolution   */
 238 #define ISDN_TIMER_02SEC       (HZ/ISDN_TIMER_RES/5)     /* Slow-Timer1 .2 sec      */
 239 #define ISDN_TIMER_1SEC        (HZ/ISDN_TIMER_RES)       /* Slow-Timer2 1 sec       */
 240 #define ISDN_TIMER_RINGING     5 /* tty RINGs = ISDN_TIMER_1SEC * this factor       */
 241 #define ISDN_TIMER_KEEPINT    10 /* Cisco-Keepalive = ISDN_TIMER_1SEC * this factor */
 242 #define ISDN_TIMER_MODEMREAD   1
 243 #define ISDN_TIMER_MODEMPLUS   2
 244 #define ISDN_TIMER_MODEMRING   4
 245 #define ISDN_TIMER_MODEMXMIT   8
 246 #define ISDN_TIMER_NETDIAL    16
 247 #define ISDN_TIMER_NETHANGUP  32
 248 #define ISDN_TIMER_CARRIER   256 /* Wait for Carrier */
 249 #define ISDN_TIMER_FAST      (ISDN_TIMER_MODEMREAD | ISDN_TIMER_MODEMPLUS | \
 250                               ISDN_TIMER_MODEMXMIT)
 251 #define ISDN_TIMER_SLOW      (ISDN_TIMER_MODEMRING | ISDN_TIMER_NETHANGUP | \
 252                               ISDN_TIMER_NETDIAL | ISDN_TIMER_CARRIER)
 253
 254 /* Timeout-Values for isdn_net_dial() */
 255 #define ISDN_TIMER_DTIMEOUT10 (10*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
 256 #define ISDN_TIMER_DTIMEOUT15 (15*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
 257 #define ISDN_TIMER_DTIMEOUT60 (60*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
 258
 259 /* GLOBAL_FLAGS */
 260 #define ISDN_GLOBAL_STOPPED 1
 261
 262 /*=================== Start of ip-over-ISDN stuff =========================*/
 263
 264 /* Feature- and status-flags for a net-interface */
 265 #define ISDN_NET_CONNECTED  0x01       /* Bound to ISDN-Channel             */
 266 #define ISDN_NET_SECURE     0x02       /* Accept calls from phonelist only  */
 267 #define ISDN_NET_CALLBACK   0x04       /* activate callback                 */
 268 #define ISDN_NET_CBHUP      0x08       /* hangup before callback            */
 269 #define ISDN_NET_CBOUT      0x10       /* remote machine does callback      */
 270
 271 #define ISDN_NET_MAGIC      0x49344C02 /* for paranoia-checking             */
 272
 273 /* Phone-list-element */
 274 typedef struct {
 275   void *next;
 276   char num[ISDN_MSNLEN];
 277 } isdn_net_phone;
 278
 279 /*
 280    Principles when extending structures for generic encapsulation protocol
 281    ("concap") support:
 282    - Stuff which is hardware specific (here i4l-specific) goes in
 283      the netdev -> local structure (here: isdn_net_local)
 284    - Stuff which is encapsulation protocol specific goes in the structure
 285      which holds the linux device structure (here: isdn_net_device)
 286 */
 287
 288 /* Local interface-data */
 289 typedef struct isdn_net_local_s {
 290   ulong                  magic;
 291   char                   name[10];     /* Name of device                   */
 292   struct net_device_stats stats;       /* Ethernet Statistics              */
 293   int                    isdn_device;  /* Index to isdn-device             */
 294   int                    isdn_channel; /* Index to isdn-channel            */
 295   int                    ppp_slot;     /* PPPD device slot number          */
 296   int                    pre_device;   /* Preselected isdn-device          */
 297   int                    pre_channel;  /* Preselected isdn-channel         */
 298   int                    exclusive;    /* If non-zero idx to reserved chan.*/
 299   int                    flags;        /* Connection-flags                 */
 300   int                    dialretry;    /* Counter for Dialout-retries      */
 301   int                    dialmax;      /* Max. Number of Dial-retries      */
 302   int                    cbdelay;      /* Delay before Callback starts     */
 303   int                    dtimer;       /* Timeout-counter for dialing      */
 304   char                   msn[ISDN_MSNLEN]; /* MSNs/EAZs for this interface */
 305   u_char                 cbhup;        /* Flag: Reject Call before Callback*/
 306   u_char                 dialstate;    /* State for dialing                */
 307   u_char                 p_encap;      /* Packet encapsulation             */
 308                                        /*   0 = Ethernet over ISDN         */
 309                                        /*   1 = RAW-IP                     */
 310                                        /*   2 = IP with type field         */
 311   u_char                 l2_proto;     /* Layer-2-protocol                 */
 312                                        /* See ISDN_PROTO_L2..-constants in */
 313                                        /* isdnif.h                         */
 314                                        /*   0 = X75/LAPB with I-Frames     */
 315                                        /*   1 = X75/LAPB with UI-Frames    */
 316                                        /*   2 = X75/LAPB with BUI-Frames   */
 317                                        /*   3 = HDLC                       */
 318   u_char                 l3_proto;     /* Layer-3-protocol                 */
 319                                        /* See ISDN_PROTO_L3..-constants in */
 320                                        /* isdnif.h                         */
 321                                        /*   0 = Transparent                */
 322   int                    huptimer;     /* Timeout-counter for auto-hangup  */
 323   int                    charge;       /* Counter for charging units       */
 324   ulong                  chargetime;   /* Timer for Charging info          */
 325   int                    hupflags;     /* Flags for charge-unit-hangup:    */
 326                                        /* bit0: chargeint is invalid       */
 327                                        /* bit1: Getting charge-interval    */
 328                                        /* bit2: Do charge-unit-hangup      */
 329                                        /* bit3: Do hangup even on incoming */
 330   int                    outgoing;     /* Flag: outgoing call              */
 331   int                    onhtime;      /* Time to keep link up             */
 332   int                    chargeint;    /* Interval between charge-infos    */
 333   int                    onum;         /* Flag: at least 1 outgoing number */
 334   int                    cps;          /* current speed of this interface  */
 335   int                    transcount;   /* byte-counter for cps-calculation */
 336   int                    sqfull;       /* Flag: netdev-queue overloaded    */
 337   ulong                  sqfull_stamp; /* Start-Time of overload           */
 338   ulong                  slavedelay;   /* Dynamic bundling delaytime       */
 339   int                    triggercps;   /* BogoCPS needed for trigger slave */
 340   isdn_net_phone         *phone[2];    /* List of remote-phonenumbers      */
 341                                        /* phone[0] = Incoming Numbers      */
 342                                        /* phone[1] = Outgoing Numbers      */
 343   isdn_net_phone         *dial;        /* Pointer to dialed number         */
 344   struct net_device      *master;      /* Ptr to Master device for slaves  */
 345   struct net_device      *slave;       /* Ptr to Slave device for masters  */
 346   struct isdn_net_local_s *next;       /* Ptr to next link in bundle       */
 347   struct isdn_net_local_s *last;       /* Ptr to last link in bundle       */
 348   struct isdn_net_dev_s  *netdev;      /* Ptr to netdev                    */
 349   struct sk_buff_head    super_tx_queue; /* List of supervisory frames to  */
 350                                        /* be transmitted asap              */
 351   atomic_t frame_cnt;                  /* number of frames currently       */
 352                                        /* queued in HL driver              */
 353                                        /* Ptr to orig. hard_header_cache   */
 354   spinlock_t             xmit_lock;    /* used to protect the xmit path of */
 355                                        /* a particular channel (including  */
 356                                        /* the frame_cnt                    */
 357
 358   int                    (*org_hhc)(
 359                                     struct neighbour *neigh,
 360                                     struct hh_cache *hh);
 361                                        /* Ptr to orig. header_cache_update */
 362   void                   (*org_hcu)(struct hh_cache *,
 363                                     struct net_device *,
 364                                     unsigned char *);
 365   int  pppbind;                        /* ippp device for bindings         */
 366   int                                   dialtimeout;    /* How long shall we try on dialing? (jiffies) */
 367   int                                   dialwait;               /* How long shall we wait after failed attempt? (jiffies) */
 368   ulong                                 dialstarted;    /* jiffies of first dialing-attempt */
 369   ulong                                 dialwait_timer; /* jiffies of earliest next dialing-attempt */
 370   int                                   huptimeout;             /* How long will the connection be up? (seconds) */
 371 #ifdef CONFIG_ISDN_X25
 372   struct concap_device_ops *dops;      /* callbacks used by encapsulator   */
 373 #endif
 374   /* use an own struct for that in later versions */
 375   ulong cisco_myseq;                   /* Local keepalive seq. for Cisco   */
 376   ulong cisco_mineseen;                /* returned keepalive seq. from remote */
 377   ulong cisco_yourseq;                 /* Remote keepalive seq. for Cisco  */
 378   int cisco_keepalive_period;           /* keepalive period */
 379   ulong cisco_last_slarp_in;            /* jiffie of last keepalive packet we received */
 380   char cisco_line_state;                /* state of line according to keepalive packets */
 381   char cisco_debserint;                 /* debugging flag of cisco hdlc with slarp */
 382   struct timer_list cisco_timer;
 383   struct work_struct tqueue;
 384 } isdn_net_local;
 385
 386 /* the interface itself */
 387 typedef struct isdn_net_dev_s {
 388   isdn_net_local *local;
 389   isdn_net_local *queue;               /* circular list of all bundled
 390                                           channels, which are currently
 391                                           online                           */
 392   spinlock_t queue_lock;               /* lock to protect queue            */
 393   void *next;                          /* Pointer to next isdn-interface   */
 394   struct net_device dev;               /* interface to upper levels        */
 395 #ifdef CONFIG_ISDN_PPP
 396   ippp_bundle * pb;             /* pointer to the common bundle structure
 397                                  * with the per-bundle data */
 398 #endif
 399 #ifdef CONFIG_ISDN_X25
 400   struct concap_proto  *cprot; /* connection oriented encapsulation protocol */
 401 #endif
 402
 403 } isdn_net_dev;
 404
 405 /*===================== End of ip-over-ISDN stuff ===========================*/
 406
 407 /*======================= Start of ISDN-tty stuff ===========================*/
 408
 409 #define ISDN_ASYNC_MAGIC          0x49344C01 /* for paranoia-checking        */
 410 #define ISDN_ASYNC_INITIALIZED    0x80000000 /* port was initialized         */
 411 #define ISDN_ASYNC_CALLOUT_ACTIVE 0x40000000 /* Call out device active       */
 412 #define ISDN_ASYNC_NORMAL_ACTIVE  0x20000000 /* Normal device active         */
 413 #define ISDN_ASYNC_CLOSING        0x08000000 /* Serial port is closing       */
 414 #define ISDN_ASYNC_CTS_FLOW       0x04000000 /* Do CTS flow control          */
 415 #define ISDN_ASYNC_CHECK_CD       0x02000000 /* i.e., CLOCAL                 */
 416 #define ISDN_ASYNC_HUP_NOTIFY         0x0001 /* Notify tty on hangups/closes */
 417 #define ISDN_ASYNC_SESSION_LOCKOUT    0x0100 /* Lock cua opens on session    */
 418 #define ISDN_ASYNC_PGRP_LOCKOUT       0x0200 /* Lock cua opens on pgrp       */
 419 #define ISDN_ASYNC_CALLOUT_NOHUP      0x0400 /* No hangup for cui            */
 420 #define ISDN_ASYNC_SPLIT_TERMIOS      0x0008 /* Sep. termios for dialin/out  */
 421 #define ISDN_SERIAL_XMIT_SIZE           1024 /* Default bufsize for write    */
 422 #define ISDN_SERIAL_XMIT_MAX            4000 /* Maximum bufsize for write    */
 423 #define ISDN_SERIAL_TYPE_NORMAL            1
 424 #define ISDN_SERIAL_TYPE_CALLOUT           2
 425
 426 #ifdef CONFIG_ISDN_AUDIO
 427 /* For using sk_buffs with audio we need some private variables
 428  * within each sk_buff. For this purpose, we declare a struct here,
 429  * and put it always at the private skb->cb data array. A few macros help
 430  * accessing the variables.
 431  */
 432 typedef struct _isdn_audio_data {
 433   unsigned short dle_count;
 434   unsigned char  lock;
 435 } isdn_audio_data_t;
 436
 437 #define ISDN_AUDIO_SKB_DLECOUNT(skb)    (((isdn_audio_data_t *)&skb->cb[0])->dle_count)
 438 #define ISDN_AUDIO_SKB_LOCK(skb)        (((isdn_audio_data_t *)&skb->cb[0])->lock)
 439 #endif
 440
 441 /* Private data of AT-command-interpreter */
 442 typedef struct atemu {
 443         u_char       profile[ISDN_MODEM_NUMREG]; /* Modem-Regs. Profile 0              */
 444         u_char       mdmreg[ISDN_MODEM_NUMREG];  /* Modem-Registers                    */
 445         char         pmsn[ISDN_MSNLEN];          /* EAZ/MSNs Profile 0                 */
 446         char         msn[ISDN_MSNLEN];           /* EAZ/MSN                            */
 447         char         plmsn[ISDN_LMSNLEN];        /* Listening MSNs Profile 0           */
 448         char         lmsn[ISDN_LMSNLEN];         /* Listening MSNs                     */
 449         char         cpn[ISDN_MSNLEN];           /* CalledPartyNumber on incoming call */
 450         char         connmsg[ISDN_CMSGLEN];      /* CONNECT-Msg from HL-Driver         */
 451 #ifdef CONFIG_ISDN_AUDIO
 452         u_char       vpar[10];                   /* Voice-parameters                   */
 453         int          lastDLE;                    /* Flag for voice-coding: DLE seen    */
 454 #endif
 455         int          mdmcmdl;                    /* Length of Modem-Commandbuffer      */
 456         int          pluscount;                  /* Counter for +++ sequence           */
 457         u_long       lastplus;                   /* Timestamp of last +                */
 458         int          carrierwait;                /* Seconds of carrier waiting         */
 459         char         mdmcmd[255];                /* Modem-Commandbuffer                */
 460         unsigned int charge;                     /* Charge units of current connection */
 461 } atemu;
 462
 463 /* Private data (similar to async_struct in <linux/serial.h>) */
 464 typedef struct modem_info {
 465   int                   magic;
 466   struct module         *owner;
 467   int                   flags;           /* defined in tty.h               */
 468   int                   x_char;          /* xon/xoff character             */
 469   int                   mcr;             /* Modem control register         */
 470   int                   msr;             /* Modem status register          */
 471   int                   lsr;             /* Line status register           */
 472   int                   line;
 473   int                   count;           /* # of fd on device              */
 474   int                   blocked_open;    /* # of blocked opens             */
 475   long                  session;         /* Session of opening process     */
 476   long                  pgrp;            /* pgrp of opening process        */
 477   int                   online;          /* 1 = B-Channel is up, drop data */
 478                                          /* 2 = B-Channel is up, deliver d.*/
 479   int                   dialing;         /* Dial in progress or ATA        */
 480   int                   rcvsched;        /* Receive needs schedule         */
 481   int                   isdn_driver;     /* Index to isdn-driver           */
 482   int                   isdn_channel;    /* Index to isdn-channel          */
 483   int                   drv_index;       /* Index to dev->usage            */
 484   int                   ncarrier;        /* Flag: schedule NO CARRIER      */
 485   unsigned char         last_cause[8];   /* Last cause message             */
 486   unsigned char         last_num[ISDN_MSNLEN];
 487                                          /* Last phone-number              */
 488   unsigned char         last_l2;         /* Last layer-2 protocol          */
 489   unsigned char         last_si;         /* Last service                   */
 490   unsigned char         last_lhup;       /* Last hangup local?             */
 491   unsigned char         last_dir;        /* Last direction (in or out)     */
 492   struct timer_list     nc_timer;        /* Timer for delayed NO CARRIER   */
 493   int                   send_outstanding;/* # of outstanding send-requests */
 494   int                   xmit_size;       /* max. # of chars in xmit_buf    */
 495   int                   xmit_count;      /* # of chars in xmit_buf         */
 496   unsigned char         *xmit_buf;       /* transmit buffer                */
 497   struct sk_buff_head   xmit_queue;      /* transmit queue                 */
 498   atomic_t              xmit_lock;       /* Semaphore for isdn_tty_write   */
 499 #ifdef CONFIG_ISDN_AUDIO
 500   int                   vonline;         /* Voice-channel status           */
 501                                          /* Bit 0 = recording              */
 502                                          /* Bit 1 = playback               */
 503                                          /* Bit 2 = playback, DLE-ETX seen */
 504   struct sk_buff_head   dtmf_queue;      /* queue for dtmf results         */
 505   void                  *adpcms;         /* state for adpcm decompression  */
 506   void                  *adpcmr;         /* state for adpcm compression    */
 507   void                  *dtmf_state;     /* state for dtmf decoder         */
 508   void                  *silence_state;  /* state for silence detection    */
 509 #endif
 510 #ifdef CONFIG_ISDN_TTY_FAX
 511   struct T30_s          *fax;            /* T30 Fax Group 3 data/interface */
 512   int                   faxonline;       /* Fax-channel status             */
 513 #endif
 514   struct tty_struct     *tty;            /* Pointer to corresponding tty   */
 515   atemu                 emu;             /* AT-emulator data               */
 516   struct termios        normal_termios;  /* For saving termios structs     */
 517   struct termios        callout_termios;
 518   wait_queue_head_t     open_wait, close_wait;
 519   struct semaphore      write_sem;
 520   spinlock_t            readlock;
 521 } modem_info;
 522
 523 #define ISDN_MODEM_WINSIZE 8
 524
 525 /* Description of one ISDN-tty */
 526 typedef struct _isdn_modem {
 527   int                refcount;                          /* Number of opens        */
 528   struct tty_driver  *tty_modem;                        /* tty-device             */
 529   struct tty_struct  *modem_table[ISDN_MAX_CHANNELS];   /* ?? copied from Orig    */
 530   struct termios     *modem_termios[ISDN_MAX_CHANNELS];
 531   struct termios     *modem_termios_locked[ISDN_MAX_CHANNELS];
 532   modem_info         info[ISDN_MAX_CHANNELS];      /* Private data           */
 533 } isdn_modem_t;
 534
 535 /*======================= End of ISDN-tty stuff ============================*/
 536
 537 /*======================== Start of V.110 stuff ============================*/
 538 #define V110_BUFSIZE 1024
 539
 540 typedef struct {
 541         int nbytes;                    /* 1 Matrixbyte -> nbytes in stream     */
 542         int nbits;                     /* Number of used bits in streambyte    */
 543         unsigned char key;             /* Bitmask in stream eg. 11 (nbits=2)   */
 544         int decodelen;                 /* Amount of data in decodebuf          */
 545         int SyncInit;                  /* Number of sync frames to send        */
 546         unsigned char *OnlineFrame;    /* Precalculated V110 idle frame        */
 547         unsigned char *OfflineFrame;   /* Precalculated V110 sync Frame        */
 548         int framelen;                  /* Length of frames                     */
 549         int skbuser;                   /* Number of unacked userdata skbs      */
 550         int skbidle;                   /* Number of unacked idle/sync skbs     */
 551         int introducer;                /* Local vars for decoder               */
 552         int dbit;
 553         unsigned char b;
 554         int skbres;                    /* space to reserve in outgoing skb     */
 555         int maxsize;                   /* maxbufsize of lowlevel driver        */
 556         unsigned char *encodebuf;      /* temporary buffer for encoding        */
 557         unsigned char decodebuf[V110_BUFSIZE]; /* incomplete V110 matrices     */
 558 } isdn_v110_stream;
 559
 560 /*========================= End of V.110 stuff =============================*/
 561
 562 /*======================= Start of general stuff ===========================*/
 563
 564 typedef struct {
 565         char *next;
 566         char *private;
 567 } infostruct;
 568
 569 #define DRV_FLAG_RUNNING 1
 570 #define DRV_FLAG_REJBUS  2
 571 #define DRV_FLAG_LOADED  4
 572
 573 /* Description of hardware-level-driver */
 574 typedef struct _isdn_driver {
 575         ulong               online;           /* Channel-Online flags             */
 576         ulong               flags;            /* Misc driver Flags                */
 577         int                 locks;            /* Number of locks for this driver  */
 578         int                 channels;         /* Number of channels               */
 579         wait_queue_head_t   st_waitq;         /* Wait-Queue for status-read's     */
 580         int                 maxbufsize;       /* Maximum Buffersize supported     */
 581         unsigned long       pktcount;         /* Until now: unused                */
 582         int                 stavail;          /* Chars avail on Status-device     */
 583         isdn_if            *interface;        /* Interface to driver              */
 584         int                *rcverr;           /* Error-counters for B-Ch.-receive */
 585         int                *rcvcount;         /* Byte-counters for B-Ch.-receive  */
 586 #ifdef CONFIG_ISDN_AUDIO
 587         unsigned long      DLEflag;           /* Flags: Insert DLE at next read   */
 588 #endif
 589         struct sk_buff_head *rpqueue;         /* Pointers to start of Rcv-Queue   */
 590         wait_queue_head_t  *rcv_waitq;       /* Wait-Queues for B-Channel-Reads  */
 591         wait_queue_head_t  *snd_waitq;       /* Wait-Queue for B-Channel-Send's  */
 592         char               msn2eaz[10][ISDN_MSNLEN];  /* Mapping-Table MSN->EAZ   */
 593 } isdn_driver_t;
 594
 595 /* Main driver-data */
 596 typedef struct isdn_devt {
 597         struct module     *owner;
 598         spinlock_t        lock;
 599         unsigned short    flags;                      /* Bitmapped Flags:           */
 600         int               drivers;                    /* Current number of drivers  */
 601         int               channels;                   /* Current number of channels */
 602         int               net_verbose;                /* Verbose-Flag               */
 603         int               modempoll;                  /* Flag: tty-read active      */
 604         spinlock_t        timerlock;
 605         int               tflags;                     /* Timer-Flags:               */
 606         /*  see ISDN_TIMER_..defines  */
 607         int               global_flags;
 608         infostruct        *infochain;                 /* List of open info-devs.    */
 609         wait_queue_head_t info_waitq;                 /* Wait-Queue for isdninfo    */
 610         struct timer_list timer;                      /* Misc.-function Timer       */
 611         int               chanmap[ISDN_MAX_CHANNELS]; /* Map minor->device-channel  */
 612         int               drvmap[ISDN_MAX_CHANNELS];  /* Map minor->driver-index    */
 613         int               usage[ISDN_MAX_CHANNELS];   /* Used by tty/ip/voice       */
 614         char              num[ISDN_MAX_CHANNELS][ISDN_MSNLEN];
 615         /* Remote number of active ch.*/
 616         int               m_idx[ISDN_MAX_CHANNELS];   /* Index for mdm....          */
 617         isdn_driver_t     *drv[ISDN_MAX_DRIVERS];     /* Array of drivers           */
 618         isdn_net_dev      *netdev;                    /* Linked list of net-if's    */
 619         char              drvid[ISDN_MAX_DRIVERS][20];/* Driver-ID                 */
 620         struct task_struct *profd;                    /* For iprofd                 */
 621         isdn_modem_t      mdm;                        /* tty-driver-data            */
 622         isdn_net_dev      *rx_netdev[ISDN_MAX_CHANNELS]; /* rx netdev-pointers     */
 623         isdn_net_dev      *st_netdev[ISDN_MAX_CHANNELS]; /* stat netdev-pointers   */
 624         ulong             ibytes[ISDN_MAX_CHANNELS];  /* Statistics incoming bytes  */
 625         ulong             obytes[ISDN_MAX_CHANNELS];  /* Statistics outgoing bytes  */
 626         int               v110emu[ISDN_MAX_CHANNELS]; /* V.110 emulator-mode 0=none */
 627         atomic_t          v110use[ISDN_MAX_CHANNELS]; /* Usage-Semaphore for stream */
 628         isdn_v110_stream  *v110[ISDN_MAX_CHANNELS];   /* V.110 private data         */
 629         struct semaphore  sem;                        /* serialize list access*/
 630         unsigned long     global_features;
 631 } isdn_dev;
 632
 633 extern isdn_dev *dev;
 634
 635
 636 #endif /* __KERNEL__ */
 637
 638 #endif /* __ISDN_H__ */