drivers/isdn/i4l/isdn_common.c

   1 /* $Id: isdn_common.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
   2  *
   3  * Linux ISDN subsystem, common used functions (linklevel).
   4  *
   5  * Copyright 1994-1999  by Fritz Elfert (fritz@isdn4linux.de)
   6  * Copyright 1995,96    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 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/poll.h>
  17 #include <linux/slab.h>
  18 #include <linux/vmalloc.h>
  19 #include <linux/isdn.h>
  20 #include <linux/mutex.h>
  21 #include "isdn_common.h"
  22 #include "isdn_tty.h"
  23 #include "isdn_net.h"
  24 #include "isdn_ppp.h"
  25 #ifdef CONFIG_ISDN_AUDIO
  26 #include "isdn_audio.h"
  27 #endif
  28 #ifdef CONFIG_ISDN_DIVERSION_MODULE
  29 #define CONFIG_ISDN_DIVERSION
  30 #endif
  31 #ifdef CONFIG_ISDN_DIVERSION
  32 #include <linux/isdn_divertif.h>
  33 #endif /* CONFIG_ISDN_DIVERSION */
  34 #include "isdn_v110.h"
  35
  36 /* Debugflags */
  37 #undef ISDN_DEBUG_STATCALLB
  38
  39 MODULE_DESCRIPTION("ISDN4Linux: link layer");
  40 MODULE_AUTHOR("Fritz Elfert");
  41 MODULE_LICENSE("GPL");
  42
  43 isdn_dev *dev;
  44
  45 static DEFINE_MUTEX(isdn_mutex);
  46 static char *isdn_revision = "$Revision: 1.1.2.3 $";
  47
  48 extern char *isdn_net_revision;
  49 extern char *isdn_tty_revision;
  50 #ifdef CONFIG_ISDN_PPP
  51 extern char *isdn_ppp_revision;
  52 #else
  53 static char *isdn_ppp_revision = ": none $";
  54 #endif
  55 #ifdef CONFIG_ISDN_AUDIO
  56 extern char *isdn_audio_revision;
  57 #else
  58 static char *isdn_audio_revision = ": none $";
  59 #endif
  60 extern char *isdn_v110_revision;
  61
  62 #ifdef CONFIG_ISDN_DIVERSION
  63 static isdn_divert_if *divert_if; /* = NULL */
  64 #endif /* CONFIG_ISDN_DIVERSION */
  65
  66
  67 static int isdn_writebuf_stub(int, int, const u_char __user *, int);
  68 static void set_global_features(void);
  69 static int isdn_wildmat(char *s, char *p);
  70 static int isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding);
  71
  72 static inline void
  73 isdn_lock_driver(isdn_driver_t *drv)
  74 {
  75         try_module_get(drv->interface->owner);
  76         drv->locks++;
  77 }
  78
  79 void
  80 isdn_lock_drivers(void)
  81 {
  82         int i;
  83
  84         for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
  85                 if (!dev->drv[i])
  86                         continue;
  87                 isdn_lock_driver(dev->drv[i]);
  88         }
  89 }
  90
  91 static inline void
  92 isdn_unlock_driver(isdn_driver_t *drv)
  93 {
  94         if (drv->locks > 0) {
  95                 drv->locks--;
  96                 module_put(drv->interface->owner);
  97         }
  98 }
  99
 100 void
 101 isdn_unlock_drivers(void)
 102 {
 103         int i;
 104
 105         for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
 106                 if (!dev->drv[i])
 107                         continue;
 108                 isdn_unlock_driver(dev->drv[i]);
 109         }
 110 }
 111
 112 #if defined(ISDN_DEBUG_NET_DUMP) || defined(ISDN_DEBUG_MODEM_DUMP)
 113 void
 114 isdn_dumppkt(char *s, u_char * p, int len, int dumplen)
 115 {
 116         int dumpc;
 117
 118         printk(KERN_DEBUG "%s(%d) ", s, len);
 119         for (dumpc = 0; (dumpc < dumplen) && (len); len--, dumpc++)
 120                 printk(" %02x", *p++);
 121         printk("\n");
 122 }
 123 #endif
 124
 125 /*
 126  * I picked the pattern-matching-functions from an old GNU-tar version (1.10)
 127  * It was originally written and put to PD by rs@mirror.TMC.COM (Rich Salz)
 128  */
 129 static int
 130 isdn_star(char *s, char *p)
 131 {
 132         while (isdn_wildmat(s, p)) {
 133                 if (*++s == '\0')
 134                         return (2);
 135         }
 136         return (0);
 137 }
 138
 139 /*
 140  * Shell-type Pattern-matching for incoming caller-Ids
 141  * This function gets a string in s and checks, if it matches the pattern
 142  * given in p.
 143  *
 144  * Return:
 145  *   0 = match.
 146  *   1 = no match.
 147  *   2 = no match. Would eventually match, if s would be longer.
 148  *
 149  * Possible Patterns:
 150  *
 151  * '?'     matches one character
 152  * '*'     matches zero or more characters
 153  * [xyz]   matches the set of characters in brackets.
 154  * [^xyz]  matches any single character not in the set of characters
 155  */
 156
 157 static int
 158 isdn_wildmat(char *s, char *p)
 159 {
 160         register int last;
 161         register int matched;
 162         register int reverse;
 163         register int nostar = 1;
 164
 165         if (!(*s) && !(*p))
 166                 return(1);
 167         for (; *p; s++, p++)
 168                 switch (*p) {
 169                         case '\\':
 170                                 /*
 171                                  * Literal match with following character,
 172                                  * fall through.
 173                                  */
 174                                 p++;
 175                         default:
 176                                 if (*s != *p)
 177                                         return (*s == '\0')?2:1;
 178                                 continue;
 179                         case '?':
 180                                 /* Match anything. */
 181                                 if (*s == '\0')
 182                                         return (2);
 183                                 continue;
 184                         case '*':
 185                                 nostar = 0;
 186                                 /* Trailing star matches everything. */
 187                                 return (*++p ? isdn_star(s, p) : 0);
 188                         case '[':
 189                                 /* [^....] means inverse character class. */
 190                                 if ((reverse = (p[1] == '^')))
 191                                         p++;
 192                                 for (last = 0, matched = 0; *++p && (*p != ']'); last = *p)
 193                                         /* This next line requires a good C compiler. */
 194                                         if (*p == '-' ? *s <= *++p && *s >= last : *s == *p)
 195                                                 matched = 1;
 196                                 if (matched == reverse)
 197                                         return (1);
 198                                 continue;
 199                 }
 200         return (*s == '\0')?0:nostar;
 201 }
 202
 203 int isdn_msncmp( const char * msn1, const char * msn2 )
 204 {
 205         char TmpMsn1[ ISDN_MSNLEN ];
 206         char TmpMsn2[ ISDN_MSNLEN ];
 207         char *p;
 208
 209         for ( p = TmpMsn1; *msn1 && *msn1 != ':'; )  // Strip off a SPID
 210                 *p++ = *msn1++;
 211         *p = '\0';
 212
 213         for ( p = TmpMsn2; *msn2 && *msn2 != ':'; )  // Strip off a SPID
 214                 *p++ = *msn2++;
 215         *p = '\0';
 216
 217         return isdn_wildmat( TmpMsn1, TmpMsn2 );
 218 }
 219
 220 int
 221 isdn_dc2minor(int di, int ch)
 222 {
 223         int i;
 224         for (i = 0; i < ISDN_MAX_CHANNELS; i++)
 225                 if (dev->chanmap[i] == ch && dev->drvmap[i] == di)
 226                         return i;
 227         return -1;
 228 }
 229
 230 static int isdn_timer_cnt1 = 0;
 231 static int isdn_timer_cnt2 = 0;
 232 static int isdn_timer_cnt3 = 0;
 233
 234 static void
 235 isdn_timer_funct(ulong dummy)
 236 {
 237         int tf = dev->tflags;
 238         if (tf & ISDN_TIMER_FAST) {
 239                 if (tf & ISDN_TIMER_MODEMREAD)
 240                         isdn_tty_readmodem();
 241                 if (tf & ISDN_TIMER_MODEMPLUS)
 242                         isdn_tty_modem_escape();
 243                 if (tf & ISDN_TIMER_MODEMXMIT)
 244                         isdn_tty_modem_xmit();
 245         }
 246         if (tf & ISDN_TIMER_SLOW) {
 247                 if (++isdn_timer_cnt1 >= ISDN_TIMER_02SEC) {
 248                         isdn_timer_cnt1 = 0;
 249                         if (tf & ISDN_TIMER_NETDIAL)
 250                                 isdn_net_dial();
 251                 }
 252                 if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) {
 253                         isdn_timer_cnt2 = 0;
 254                         if (tf & ISDN_TIMER_NETHANGUP)
 255                                 isdn_net_autohup();
 256                         if (++isdn_timer_cnt3 >= ISDN_TIMER_RINGING) {
 257                                 isdn_timer_cnt3 = 0;
 258                                 if (tf & ISDN_TIMER_MODEMRING)
 259                                         isdn_tty_modem_ring();
 260                         }
 261                         if (tf & ISDN_TIMER_CARRIER)
 262                                 isdn_tty_carrier_timeout();
 263                 }
 264         }
 265         if (tf)
 266                 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
 267 }
 268
 269 void
 270 isdn_timer_ctrl(int tf, int onoff)
 271 {
 272         unsigned long flags;
 273         int old_tflags;
 274
 275         spin_lock_irqsave(&dev->timerlock, flags);
 276         if ((tf & ISDN_TIMER_SLOW) && (!(dev->tflags & ISDN_TIMER_SLOW))) {
 277                 /* If the slow-timer wasn't activated until now */
 278                 isdn_timer_cnt1 = 0;
 279                 isdn_timer_cnt2 = 0;
 280         }
 281         old_tflags = dev->tflags;
 282         if (onoff)
 283                 dev->tflags |= tf;
 284         else
 285                 dev->tflags &= ~tf;
 286         if (dev->tflags && !old_tflags)
 287                 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
 288         spin_unlock_irqrestore(&dev->timerlock, flags);
 289 }
 290
 291 /*
 292  * Receive a packet from B-Channel. (Called from low-level-module)
 293  */
 294 static void
 295 isdn_receive_skb_callback(int di, int channel, struct sk_buff *skb)
 296 {
 297         int i;
 298
 299         if ((i = isdn_dc2minor(di, channel)) == -1) {
 300                 dev_kfree_skb(skb);
 301                 return;
 302         }
 303         /* Update statistics */
 304         dev->ibytes[i] += skb->len;
 305
 306         /* First, try to deliver data to network-device */
 307         if (isdn_net_rcv_skb(i, skb))
 308                 return;
 309
 310         /* V.110 handling
 311          * makes sense for async streams only, so it is
 312          * called after possible net-device delivery.
 313          */
 314         if (dev->v110[i]) {
 315                 atomic_inc(&dev->v110use[i]);
 316                 skb = isdn_v110_decode(dev->v110[i], skb);
 317                 atomic_dec(&dev->v110use[i]);
 318                 if (!skb)
 319                         return;
 320         }
 321
 322         /* No network-device found, deliver to tty or raw-channel */
 323         if (skb->len) {
 324                 if (isdn_tty_rcv_skb(i, di, channel, skb))
 325                         return;
 326                 wake_up_interruptible(&dev->drv[di]->rcv_waitq[channel]);
 327         } else
 328                 dev_kfree_skb(skb);
 329 }
 330
 331 /*
 332  * Intercept command from Linklevel to Lowlevel.
 333  * If layer 2 protocol is V.110 and this is not supported by current
 334  * lowlevel-driver, use driver's transparent mode and handle V.110 in
 335  * linklevel instead.
 336  */
 337 int
 338 isdn_command(isdn_ctrl *cmd)
 339 {
 340         if (cmd->driver == -1) {
 341                 printk(KERN_WARNING "isdn_command command(%x) driver -1\n", cmd->command);
 342                 return(1);
 343         }
 344         if (!dev->drv[cmd->driver]) {
 345                 printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d] NULL\n",
 346                         cmd->command, cmd->driver);
 347                 return(1);
 348         }
 349         if (!dev->drv[cmd->driver]->interface) {
 350                 printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d]->interface NULL\n",
 351                         cmd->command, cmd->driver);
 352                 return(1);
 353         }
 354         if (cmd->command == ISDN_CMD_SETL2) {
 355                 int idx = isdn_dc2minor(cmd->driver, cmd->arg & 255);
 356                 unsigned long l2prot = (cmd->arg >> 8) & 255;
 357                 unsigned long features = (dev->drv[cmd->driver]->interface->features
 358                                                 >> ISDN_FEATURE_L2_SHIFT) &
 359                                                 ISDN_FEATURE_L2_MASK;
 360                 unsigned long l2_feature = (1 << l2prot);
 361
 362                 switch (l2prot) {
 363                         case ISDN_PROTO_L2_V11096:
 364                         case ISDN_PROTO_L2_V11019:
 365                         case ISDN_PROTO_L2_V11038:
 366                         /* If V.110 requested, but not supported by
 367                          * HL-driver, set emulator-flag and change
 368                          * Layer-2 to transparent
 369                          */
 370                                 if (!(features & l2_feature)) {
 371                                         dev->v110emu[idx] = l2prot;
 372                                         cmd->arg = (cmd->arg & 255) |
 373                                                 (ISDN_PROTO_L2_TRANS << 8);
 374                                 } else
 375                                         dev->v110emu[idx] = 0;
 376                 }
 377         }
 378         return dev->drv[cmd->driver]->interface->command(cmd);
 379 }
 380
 381 void
 382 isdn_all_eaz(int di, int ch)
 383 {
 384         isdn_ctrl cmd;
 385
 386         if (di < 0)
 387                 return;
 388         cmd.driver = di;
 389         cmd.arg = ch;
 390         cmd.command = ISDN_CMD_SETEAZ;
 391         cmd.parm.num[0] = '\0';
 392         isdn_command(&cmd);
 393 }
 394
 395 /*
 396  * Begin of a CAPI like LL<->HL interface, currently used only for
 397  * supplementary service (CAPI 2.0 part III)
 398  */
 399 #include <linux/isdn/capicmd.h>
 400
 401 static int
 402 isdn_capi_rec_hl_msg(capi_msg *cm) {
 403
 404         int di;
 405         int ch;
 406
 407         di = (cm->adr.Controller & 0x7f) -1;
 408         ch = isdn_dc2minor(di, (cm->adr.Controller>>8)& 0x7f);
 409         switch(cm->Command) {
 410                 case CAPI_FACILITY:
 411                         /* in the moment only handled in tty */
 412                         return(isdn_tty_capi_facility(cm));
 413                 default:
 414                         return(-1);
 415         }
 416 }
 417
 418 static int
 419 isdn_status_callback(isdn_ctrl * c)
 420 {
 421         int di;
 422         u_long flags;
 423         int i;
 424         int r;
 425         int retval = 0;
 426         isdn_ctrl cmd;
 427         isdn_net_dev *p;
 428
 429         di = c->driver;
 430         i = isdn_dc2minor(di, c->arg);
 431         switch (c->command) {
 432                 case ISDN_STAT_BSENT:
 433                         if (i < 0)
 434                                 return -1;
 435                         if (dev->global_flags & ISDN_GLOBAL_STOPPED)
 436                                 return 0;
 437                         if (isdn_net_stat_callback(i, c))
 438                                 return 0;
 439                         if (isdn_v110_stat_callback(i, c))
 440                                 return 0;
 441                         if (isdn_tty_stat_callback(i, c))
 442                                 return 0;
 443                         wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]);
 444                         break;
 445                 case ISDN_STAT_STAVAIL:
 446                         dev->drv[di]->stavail += c->arg;
 447                         wake_up_interruptible(&dev->drv[di]->st_waitq);
 448                         break;
 449                 case ISDN_STAT_RUN:
 450                         dev->drv[di]->flags |= DRV_FLAG_RUNNING;
 451                         for (i = 0; i < ISDN_MAX_CHANNELS; i++)
 452                                 if (dev->drvmap[i] == di)
 453                                         isdn_all_eaz(di, dev->chanmap[i]);
 454                         set_global_features();
 455                         break;
 456                 case ISDN_STAT_STOP:
 457                         dev->drv[di]->flags &= ~DRV_FLAG_RUNNING;
 458                         break;
 459                 case ISDN_STAT_ICALL:
 460                         if (i < 0)
 461                                 return -1;
 462 #ifdef ISDN_DEBUG_STATCALLB
 463                         printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num);
 464 #endif
 465                         if (dev->global_flags & ISDN_GLOBAL_STOPPED) {
 466                                 cmd.driver = di;
 467                                 cmd.arg = c->arg;
 468                                 cmd.command = ISDN_CMD_HANGUP;
 469                                 isdn_command(&cmd);
 470                                 return 0;
 471                         }
 472                         /* Try to find a network-interface which will accept incoming call */
 473                         r = ((c->command == ISDN_STAT_ICALLW) ? 0 : isdn_net_find_icall(di, c->arg, i, &c->parm.setup));
 474                         switch (r) {
 475                                 case 0:
 476                                         /* No network-device replies.
 477                                          * Try ttyI's.
 478                                          * These return 0 on no match, 1 on match and
 479                                          * 3 on eventually match, if CID is longer.
 480                                          */
 481                                         if (c->command == ISDN_STAT_ICALL)
 482                                           if ((retval = isdn_tty_find_icall(di, c->arg, &c->parm.setup))) return(retval);
 483 #ifdef CONFIG_ISDN_DIVERSION
 484                                          if (divert_if)
 485                                           if ((retval = divert_if->stat_callback(c)))
 486                                             return(retval); /* processed */
 487 #endif /* CONFIG_ISDN_DIVERSION */
 488                                         if ((!retval) && (dev->drv[di]->flags & DRV_FLAG_REJBUS)) {
 489                                                 /* No tty responding */
 490                                                 cmd.driver = di;
 491                                                 cmd.arg = c->arg;
 492                                                 cmd.command = ISDN_CMD_HANGUP;
 493                                                 isdn_command(&cmd);
 494                                                 retval = 2;
 495                                         }
 496                                         break;
 497                                 case 1:
 498                                         /* Schedule connection-setup */
 499                                         isdn_net_dial();
 500                                         cmd.driver = di;
 501                                         cmd.arg = c->arg;
 502                                         cmd.command = ISDN_CMD_ACCEPTD;
 503                                         for ( p = dev->netdev; p; p = p->next )
 504                                                 if ( p->local->isdn_channel == cmd.arg )
 505                                                 {
 506                                                         strcpy( cmd.parm.setup.eazmsn, p->local->msn );
 507                                                         isdn_command(&cmd);
 508                                                         retval = 1;
 509                                                         break;
 510                                                 }
 511                                         break;
 512
 513                                 case 2: /* For calling back, first reject incoming call ... */
 514                                 case 3: /* Interface found, but down, reject call actively  */
 515                                         retval = 2;
 516                                         printk(KERN_INFO "isdn: Rejecting Call\n");
 517                                         cmd.driver = di;
 518                                         cmd.arg = c->arg;
 519                                         cmd.command = ISDN_CMD_HANGUP;
 520                                         isdn_command(&cmd);
 521                                         if (r == 3)
 522                                                 break;
 523                                         /* Fall through */
 524                                 case 4:
 525                                         /* ... then start callback. */
 526                                         isdn_net_dial();
 527                                         break;
 528                                 case 5:
 529                                         /* Number would eventually match, if longer */
 530                                         retval = 3;
 531                                         break;
 532                         }
 533 #ifdef ISDN_DEBUG_STATCALLB
 534                         printk(KERN_DEBUG "ICALL: ret=%d\n", retval);
 535 #endif
 536                         return retval;
 537                         break;
 538                 case ISDN_STAT_CINF:
 539                         if (i < 0)
 540                                 return -1;
 541 #ifdef ISDN_DEBUG_STATCALLB
 542                         printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num);
 543 #endif
 544                         if (dev->global_flags & ISDN_GLOBAL_STOPPED)
 545                                 return 0;
 546                         if (strcmp(c->parm.num, "0"))
 547                                 isdn_net_stat_callback(i, c);
 548                         isdn_tty_stat_callback(i, c);
 549                         break;
 550                 case ISDN_STAT_CAUSE:
 551 #ifdef ISDN_DEBUG_STATCALLB
 552                         printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num);
 553 #endif
 554                         printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n",
 555                                dev->drvid[di], c->arg, c->parm.num);
 556                         isdn_tty_stat_callback(i, c);
 557 #ifdef CONFIG_ISDN_DIVERSION
 558                         if (divert_if)
 559                          divert_if->stat_callback(c);
 560 #endif /* CONFIG_ISDN_DIVERSION */
 561                         break;
 562                 case ISDN_STAT_DISPLAY:
 563 #ifdef ISDN_DEBUG_STATCALLB
 564                         printk(KERN_DEBUG "DISPLAY: %ld %s\n", c->arg, c->parm.display);
 565 #endif
 566                         isdn_tty_stat_callback(i, c);
 567 #ifdef CONFIG_ISDN_DIVERSION
 568                         if (divert_if)
 569                          divert_if->stat_callback(c);
 570 #endif /* CONFIG_ISDN_DIVERSION */
 571                         break;
 572                 case ISDN_STAT_DCONN:
 573                         if (i < 0)
 574                                 return -1;
 575 #ifdef ISDN_DEBUG_STATCALLB
 576                         printk(KERN_DEBUG "DCONN: %ld\n", c->arg);
 577 #endif
 578                         if (dev->global_flags & ISDN_GLOBAL_STOPPED)
 579                                 return 0;
 580                         /* Find any net-device, waiting for D-channel setup */
 581                         if (isdn_net_stat_callback(i, c))
 582                                 break;
 583                         isdn_v110_stat_callback(i, c);
 584                         /* Find any ttyI, waiting for D-channel setup */
 585                         if (isdn_tty_stat_callback(i, c)) {
 586                                 cmd.driver = di;
 587                                 cmd.arg = c->arg;
 588                                 cmd.command = ISDN_CMD_ACCEPTB;
 589                                 isdn_command(&cmd);
 590                                 break;
 591                         }
 592                         break;
 593                 case ISDN_STAT_DHUP:
 594                         if (i < 0)
 595                                 return -1;
 596 #ifdef ISDN_DEBUG_STATCALLB
 597                         printk(KERN_DEBUG "DHUP: %ld\n", c->arg);
 598 #endif
 599                         if (dev->global_flags & ISDN_GLOBAL_STOPPED)
 600                                 return 0;
 601                         dev->drv[di]->online &= ~(1 << (c->arg));
 602                         isdn_info_update();
 603                         /* Signal hangup to network-devices */
 604                         if (isdn_net_stat_callback(i, c))
 605                                 break;
 606                         isdn_v110_stat_callback(i, c);
 607                         if (isdn_tty_stat_callback(i, c))
 608                                 break;
 609 #ifdef CONFIG_ISDN_DIVERSION
 610                         if (divert_if)
 611                          divert_if->stat_callback(c);
 612 #endif /* CONFIG_ISDN_DIVERSION */
 613                         break;
 614                         break;
 615                 case ISDN_STAT_BCONN:
 616                         if (i < 0)
 617                                 return -1;
 618 #ifdef ISDN_DEBUG_STATCALLB
 619                         printk(KERN_DEBUG "BCONN: %ld\n", c->arg);
 620 #endif
 621                         /* Signal B-channel-connect to network-devices */
 622                         if (dev->global_flags & ISDN_GLOBAL_STOPPED)
 623                                 return 0;
 624                         dev->drv[di]->online |= (1 << (c->arg));
 625                         isdn_info_update();
 626                         if (isdn_net_stat_callback(i, c))
 627                                 break;
 628                         isdn_v110_stat_callback(i, c);
 629                         if (isdn_tty_stat_callback(i, c))
 630                                 break;
 631                         break;
 632                 case ISDN_STAT_BHUP:
 633                         if (i < 0)
 634                                 return -1;
 635 #ifdef ISDN_DEBUG_STATCALLB
 636                         printk(KERN_DEBUG "BHUP: %ld\n", c->arg);
 637 #endif
 638                         if (dev->global_flags & ISDN_GLOBAL_STOPPED)
 639                                 return 0;
 640                         dev->drv[di]->online &= ~(1 << (c->arg));
 641                         isdn_info_update();
 642 #ifdef CONFIG_ISDN_X25
 643                         /* Signal hangup to network-devices */
 644                         if (isdn_net_stat_callback(i, c))
 645                                 break;
 646 #endif
 647                         isdn_v110_stat_callback(i, c);
 648                         if (isdn_tty_stat_callback(i, c))
 649                                 break;
 650                         break;
 651                 case ISDN_STAT_NODCH:
 652                         if (i < 0)
 653                                 return -1;
 654 #ifdef ISDN_DEBUG_STATCALLB
 655                         printk(KERN_DEBUG "NODCH: %ld\n", c->arg);
 656 #endif
 657                         if (dev->global_flags & ISDN_GLOBAL_STOPPED)
 658                                 return 0;
 659                         if (isdn_net_stat_callback(i, c))
 660                                 break;
 661                         if (isdn_tty_stat_callback(i, c))
 662                                 break;
 663                         break;
 664                 case ISDN_STAT_ADDCH:
 665                         spin_lock_irqsave(&dev->lock, flags);
 666                         if (isdn_add_channels(dev->drv[di], di, c->arg, 1)) {
 667                                 spin_unlock_irqrestore(&dev->lock, flags);
 668                                 return -1;
 669                         }
 670                         spin_unlock_irqrestore(&dev->lock, flags);
 671                         isdn_info_update();
 672                         break;
 673                 case ISDN_STAT_DISCH:
 674                         spin_lock_irqsave(&dev->lock, flags);
 675                         for (i = 0; i < ISDN_MAX_CHANNELS; i++)
 676                                 if ((dev->drvmap[i] == di) &&
 677                                     (dev->chanmap[i] == c->arg)) {
 678                                     if (c->parm.num[0])
 679                                       dev->usage[i] &= ~ISDN_USAGE_DISABLED;
 680                                     else
 681                                       if (USG_NONE(dev->usage[i])) {
 682                                         dev->usage[i] |= ISDN_USAGE_DISABLED;
 683                                       }
 684                                       else
 685                                         retval = -1;
 686                                     break;
 687                                 }
 688                         spin_unlock_irqrestore(&dev->lock, flags);
 689                         isdn_info_update();
 690                         break;
 691                 case ISDN_STAT_UNLOAD:
 692                         while (dev->drv[di]->locks > 0) {
 693                                 isdn_unlock_driver(dev->drv[di]);
 694                         }
 695                         spin_lock_irqsave(&dev->lock, flags);
 696                         isdn_tty_stat_callback(i, c);
 697                         for (i = 0; i < ISDN_MAX_CHANNELS; i++)
 698                                 if (dev->drvmap[i] == di) {
 699                                         dev->drvmap[i] = -1;
 700                                         dev->chanmap[i] = -1;
 701                                         dev->usage[i] &= ~ISDN_USAGE_DISABLED;
 702                                 }
 703                         dev->drivers--;
 704                         dev->channels -= dev->drv[di]->channels;
 705                         kfree(dev->drv[di]->rcverr);
 706                         kfree(dev->drv[di]->rcvcount);
 707                         for (i = 0; i < dev->drv[di]->channels; i++)
 708                                 skb_queue_purge(&dev->drv[di]->rpqueue[i]);
 709                         kfree(dev->drv[di]->rpqueue);
 710                         kfree(dev->drv[di]->rcv_waitq);
 711                         kfree(dev->drv[di]);
 712                         dev->drv[di] = NULL;
 713                         dev->drvid[di][0] = '\0';
 714                         isdn_info_update();
 715                         set_global_features();
 716                         spin_unlock_irqrestore(&dev->lock, flags);
 717                         return 0;
 718                 case ISDN_STAT_L1ERR:
 719                         break;
 720                 case CAPI_PUT_MESSAGE:
 721                         return(isdn_capi_rec_hl_msg(&c->parm.cmsg));
 722 #ifdef CONFIG_ISDN_TTY_FAX
 723                 case ISDN_STAT_FAXIND:
 724                         isdn_tty_stat_callback(i, c);
 725                         break;
 726 #endif
 727 #ifdef CONFIG_ISDN_AUDIO
 728                 case ISDN_STAT_AUDIO:
 729                         isdn_tty_stat_callback(i, c);
 730                         break;
 731 #endif
 732 #ifdef CONFIG_ISDN_DIVERSION
 733                 case ISDN_STAT_PROT:
 734                 case ISDN_STAT_REDIR:
 735                         if (divert_if)
 736                           return(divert_if->stat_callback(c));
 737 #endif /* CONFIG_ISDN_DIVERSION */
 738                 default:
 739                         return -1;
 740         }
 741         return 0;
 742 }
 743
 744 /*
 745  * Get integer from char-pointer, set pointer to end of number
 746  */
 747 int
 748 isdn_getnum(char **p)
 749 {
 750         int v = -1;
 751
 752         while (*p[0] >= '0' && *p[0] <= '9')
 753                 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0');
 754         return v;
 755 }
 756
 757 #define DLE 0x10
 758
 759 /*
 760  * isdn_readbchan() tries to get data from the read-queue.
 761  * It MUST be called with interrupts off.
 762  *
 763  * Be aware that this is not an atomic operation when sleep != 0, even though
 764  * interrupts are turned off! Well, like that we are currently only called
 765  * on behalf of a read system call on raw device files (which are documented
 766  * to be dangerous and for debugging purpose only). The inode semaphore
 767  * takes care that this is not called for the same minor device number while
 768  * we are sleeping, but access is not serialized against simultaneous read()
 769  * from the corresponding ttyI device. Can other ugly events, like changes
 770  * of the mapping (di,ch)<->minor, happen during the sleep? --he
 771  */
 772 int
 773 isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, wait_queue_head_t *sleep)
 774 {
 775         int count;
 776         int count_pull;
 777         int count_put;
 778         int dflag;
 779         struct sk_buff *skb;
 780         u_char *cp;
 781
 782         if (!dev->drv[di])
 783                 return 0;
 784         if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) {
 785                 if (sleep)
 786                         interruptible_sleep_on(sleep);
 787                 else
 788                         return 0;
 789         }
 790         if (len > dev->drv[di]->rcvcount[channel])
 791                 len = dev->drv[di]->rcvcount[channel];
 792         cp = buf;
 793         count = 0;
 794         while (len) {
 795                 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
 796                         break;
 797 #ifdef CONFIG_ISDN_AUDIO
 798                 if (ISDN_AUDIO_SKB_LOCK(skb))
 799                         break;
 800                 ISDN_AUDIO_SKB_LOCK(skb) = 1;
 801                 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
 802                         char *p = skb->data;
 803                         unsigned long DLEmask = (1 << channel);
 804
 805                         dflag = 0;
 806                         count_pull = count_put = 0;
 807                         while ((count_pull < skb->len) && (len > 0)) {
 808                                 len--;
 809                                 if (dev->drv[di]->DLEflag & DLEmask) {
 810                                         *cp++ = DLE;
 811                                         dev->drv[di]->DLEflag &= ~DLEmask;
 812                                 } else {
 813                                         *cp++ = *p;
 814                                         if (*p == DLE) {
 815                                                 dev->drv[di]->DLEflag |= DLEmask;
 816                                                 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
 817                                         }
 818                                         p++;
 819                                         count_pull++;
 820                                 }
 821                                 count_put++;
 822                         }
 823                         if (count_pull >= skb->len)
 824                                 dflag = 1;
 825                 } else {
 826 #endif
 827                         /* No DLE's in buff, so simply copy it */
 828                         dflag = 1;
 829                         if ((count_pull = skb->len) > len) {
 830                                 count_pull = len;
 831                                 dflag = 0;
 832                         }
 833                         count_put = count_pull;
 834                         skb_copy_from_linear_data(skb, cp, count_put);
 835                         cp += count_put;
 836                         len -= count_put;
 837 #ifdef CONFIG_ISDN_AUDIO
 838                 }
 839 #endif
 840                 count += count_put;
 841                 if (fp) {
 842                         memset(fp, 0, count_put);
 843                         fp += count_put;
 844                 }
 845                 if (dflag) {
 846                         /* We got all the data in this buff.
 847                          * Now we can dequeue it.
 848                          */
 849                         if (fp)
 850                                 *(fp - 1) = 0xff;
 851 #ifdef CONFIG_ISDN_AUDIO
 852                         ISDN_AUDIO_SKB_LOCK(skb) = 0;
 853 #endif
 854                         skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
 855                         dev_kfree_skb(skb);
 856                 } else {
 857                         /* Not yet emptied this buff, so it
 858                          * must stay in the queue, for further calls
 859                          * but we pull off the data we got until now.
 860                          */
 861                         skb_pull(skb, count_pull);
 862 #ifdef CONFIG_ISDN_AUDIO
 863                         ISDN_AUDIO_SKB_LOCK(skb) = 0;
 864 #endif
 865                 }
 866                 dev->drv[di]->rcvcount[channel] -= count_put;
 867         }
 868         return count;
 869 }
 870
 871 /*
 872  * isdn_readbchan_tty() tries to get data from the read-queue.
 873  * It MUST be called with interrupts off.
 874  *
 875  * Be aware that this is not an atomic operation when sleep != 0, even though
 876  * interrupts are turned off! Well, like that we are currently only called
 877  * on behalf of a read system call on raw device files (which are documented
 878  * to be dangerous and for debugging purpose only). The inode semaphore
 879  * takes care that this is not called for the same minor device number while
 880  * we are sleeping, but access is not serialized against simultaneous read()
 881  * from the corresponding ttyI device. Can other ugly events, like changes
 882  * of the mapping (di,ch)<->minor, happen during the sleep? --he
 883  */
 884 int
 885 isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
 886 {
 887         int count;
 888         int count_pull;
 889         int count_put;
 890         int dflag;
 891         struct sk_buff *skb;
 892         char last = 0;
 893         int len;
 894
 895         if (!dev->drv[di])
 896                 return 0;
 897         if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
 898                         return 0;
 899
 900         len = tty_buffer_request_room(tty, dev->drv[di]->rcvcount[channel]);
 901         if(len == 0)
 902                 return len;
 903
 904         count = 0;
 905         while (len) {
 906                 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
 907                         break;
 908 #ifdef CONFIG_ISDN_AUDIO
 909                 if (ISDN_AUDIO_SKB_LOCK(skb))
 910                         break;
 911                 ISDN_AUDIO_SKB_LOCK(skb) = 1;
 912                 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
 913                         char *p = skb->data;
 914                         unsigned long DLEmask = (1 << channel);
 915
 916                         dflag = 0;
 917                         count_pull = count_put = 0;
 918                         while ((count_pull < skb->len) && (len > 0)) {
 919                                 /* push every character but the last to the tty buffer directly */
 920                                 if ( count_put )
 921                                         tty_insert_flip_char(tty, last, TTY_NORMAL);
 922                                 len--;
 923                                 if (dev->drv[di]->DLEflag & DLEmask) {
 924                                         last = DLE;
 925                                         dev->drv[di]->DLEflag &= ~DLEmask;
 926                                 } else {
 927                                         last = *p;
 928                                         if (last == DLE) {
 929                                                 dev->drv[di]->DLEflag |= DLEmask;
 930                                                 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
 931                                         }
 932                                         p++;
 933                                         count_pull++;
 934                                 }
 935                                 count_put++;
 936                         }
 937                         if (count_pull >= skb->len)
 938                                 dflag = 1;
 939                 } else {
 940 #endif
 941                         /* No DLE's in buff, so simply copy it */
 942                         dflag = 1;
 943                         if ((count_pull = skb->len) > len) {
 944                                 count_pull = len;
 945                                 dflag = 0;
 946                         }
 947                         count_put = count_pull;
 948                         if(count_put > 1)
 949                                 tty_insert_flip_string(tty, skb->data, count_put - 1);
 950                         last = skb->data[count_put - 1];
 951                         len -= count_put;
 952 #ifdef CONFIG_ISDN_AUDIO
 953                 }
 954 #endif
 955                 count += count_put;
 956                 if (dflag) {
 957                         /* We got all the data in this buff.
 958                          * Now we can dequeue it.
 959                          */
 960                         if(cisco_hack)
 961                                 tty_insert_flip_char(tty, last, 0xFF);
 962                         else
 963                                 tty_insert_flip_char(tty, last, TTY_NORMAL);
 964 #ifdef CONFIG_ISDN_AUDIO
 965                         ISDN_AUDIO_SKB_LOCK(skb) = 0;
 966 #endif
 967                         skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
 968                         dev_kfree_skb(skb);
 969                 } else {
 970                         tty_insert_flip_char(tty, last, TTY_NORMAL);
 971                         /* Not yet emptied this buff, so it
 972                          * must stay in the queue, for further calls
 973                          * but we pull off the data we got until now.
 974                          */
 975                         skb_pull(skb, count_pull);
 976 #ifdef CONFIG_ISDN_AUDIO
 977                         ISDN_AUDIO_SKB_LOCK(skb) = 0;
 978 #endif
 979                 }
 980                 dev->drv[di]->rcvcount[channel] -= count_put;
 981         }
 982         return count;
 983 }
 984
 985
 986 static inline int
 987 isdn_minor2drv(int minor)
 988 {
 989         return (dev->drvmap[minor]);
 990 }
 991
 992 static inline int
 993 isdn_minor2chan(int minor)
 994 {
 995         return (dev->chanmap[minor]);
 996 }
 997
 998 static char *
 999 isdn_statstr(void)
1000 {
1001         static char istatbuf[2048];
1002         char *p;
1003         int i;
1004
1005         sprintf(istatbuf, "idmap:\t");
1006         p = istatbuf + strlen(istatbuf);
1007         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1008                 sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]);
1009                 p = istatbuf + strlen(istatbuf);
1010         }
1011         sprintf(p, "\nchmap:\t");
1012         p = istatbuf + strlen(istatbuf);
1013         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1014                 sprintf(p, "%d ", dev->chanmap[i]);
1015                 p = istatbuf + strlen(istatbuf);
1016         }
1017         sprintf(p, "\ndrmap:\t");
1018         p = istatbuf + strlen(istatbuf);
1019         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1020                 sprintf(p, "%d ", dev->drvmap[i]);
1021                 p = istatbuf + strlen(istatbuf);
1022         }
1023         sprintf(p, "\nusage:\t");
1024         p = istatbuf + strlen(istatbuf);
1025         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1026                 sprintf(p, "%d ", dev->usage[i]);
1027                 p = istatbuf + strlen(istatbuf);
1028         }
1029         sprintf(p, "\nflags:\t");
1030         p = istatbuf + strlen(istatbuf);
1031         for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
1032                 if (dev->drv[i]) {
1033                         sprintf(p, "%ld ", dev->drv[i]->online);
1034                         p = istatbuf + strlen(istatbuf);
1035                 } else {
1036                         sprintf(p, "? ");
1037                         p = istatbuf + strlen(istatbuf);
1038                 }
1039         }
1040         sprintf(p, "\nphone:\t");
1041         p = istatbuf + strlen(istatbuf);
1042         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1043                 sprintf(p, "%s ", dev->num[i]);
1044                 p = istatbuf + strlen(istatbuf);
1045         }
1046         sprintf(p, "\n");
1047         return istatbuf;
1048 }
1049
1050 /* Module interface-code */
1051
1052 void
1053 isdn_info_update(void)
1054 {
1055         infostruct *p = dev->infochain;
1056
1057         while (p) {
1058                 *(p->private) = 1;
1059                 p = (infostruct *) p->next;
1060         }
1061         wake_up_interruptible(&(dev->info_waitq));
1062 }
1063
1064 static ssize_t
1065 isdn_read(struct file *file, char __user *buf, size_t count, loff_t * off)
1066 {
1067         uint minor = iminor(file->f_path.dentry->d_inode);
1068         int len = 0;
1069         int drvidx;
1070         int chidx;
1071         int retval;
1072         char *p;
1073
1074         mutex_lock(&isdn_mutex);
1075         if (minor == ISDN_MINOR_STATUS) {
1076                 if (!file->private_data) {
1077                         if (file->f_flags & O_NONBLOCK) {
1078                                 retval = -EAGAIN;
1079                                 goto out;
1080                         }
1081                         interruptible_sleep_on(&(dev->info_waitq));
1082                 }
1083                 p = isdn_statstr();
1084                 file->private_data = NULL;
1085                 if ((len = strlen(p)) <= count) {
1086                         if (copy_to_user(buf, p, len)) {
1087                                 retval = -EFAULT;
1088                                 goto out;
1089                         }
1090                         *off += len;
1091                         retval = len;
1092                         goto out;
1093                 }
1094                 retval = 0;
1095                 goto out;
1096         }
1097         if (!dev->drivers) {
1098                 retval = -ENODEV;
1099                 goto out;
1100         }
1101         if (minor <= ISDN_MINOR_BMAX) {
1102                 printk(KERN_WARNING "isdn_read minor %d obsolete!\n", minor);
1103                 drvidx = isdn_minor2drv(minor);
1104                 if (drvidx < 0) {
1105                         retval = -ENODEV;
1106                         goto out;
1107                 }
1108                 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1109                         retval = -ENODEV;
1110                         goto out;
1111                 }
1112                 chidx = isdn_minor2chan(minor);
1113                 if (!(p = kmalloc(count, GFP_KERNEL))) {
1114                         retval = -ENOMEM;
1115                         goto out;
1116                 }
1117                 len = isdn_readbchan(drvidx, chidx, p, NULL, count,
1118                                      &dev->drv[drvidx]->rcv_waitq[chidx]);
1119                 *off += len;
1120                 if (copy_to_user(buf,p,len))
1121                         len = -EFAULT;
1122                 kfree(p);
1123                 retval = len;
1124                 goto out;
1125         }
1126         if (minor <= ISDN_MINOR_CTRLMAX) {
1127                 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1128                 if (drvidx < 0) {
1129                         retval = -ENODEV;
1130                         goto out;
1131                 }
1132                 if (!dev->drv[drvidx]->stavail) {
1133                         if (file->f_flags & O_NONBLOCK) {
1134                                 retval = -EAGAIN;
1135                                 goto out;
1136                         }
1137                         interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq));
1138                 }
1139                 if (dev->drv[drvidx]->interface->readstat) {
1140                         if (count > dev->drv[drvidx]->stavail)
1141                                 count = dev->drv[drvidx]->stavail;
1142                         len = dev->drv[drvidx]->interface->readstat(buf, count,
1143                                 drvidx, isdn_minor2chan(minor - ISDN_MINOR_CTRL));
1144                         if (len < 0) {
1145                                 retval = len;
1146                                 goto out;
1147                         }
1148                 } else {
1149                         len = 0;
1150                 }
1151                 if (len)
1152                         dev->drv[drvidx]->stavail -= len;
1153                 else
1154                         dev->drv[drvidx]->stavail = 0;
1155                 *off += len;
1156                 retval = len;
1157                 goto out;
1158         }
1159 #ifdef CONFIG_ISDN_PPP
1160         if (minor <= ISDN_MINOR_PPPMAX) {
1161                 retval = isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count);
1162                 goto out;
1163         }
1164 #endif
1165         retval = -ENODEV;
1166  out:
1167         mutex_unlock(&isdn_mutex);
1168         return retval;
1169 }
1170
1171 static ssize_t
1172 isdn_write(struct file *file, const char __user *buf, size_t count, loff_t * off)
1173 {
1174         uint minor = iminor(file->f_path.dentry->d_inode);
1175         int drvidx;
1176         int chidx;
1177         int retval;
1178
1179         if (minor == ISDN_MINOR_STATUS)
1180                 return -EPERM;
1181         if (!dev->drivers)
1182                 return -ENODEV;
1183
1184         mutex_lock(&isdn_mutex);
1185         if (minor <= ISDN_MINOR_BMAX) {
1186                 printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor);
1187                 drvidx = isdn_minor2drv(minor);
1188                 if (drvidx < 0) {
1189                         retval = -ENODEV;
1190                         goto out;
1191                 }
1192                 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1193                         retval = -ENODEV;
1194                         goto out;
1195                 }
1196                 chidx = isdn_minor2chan(minor);
1197                 while ((retval = isdn_writebuf_stub(drvidx, chidx, buf, count)) == 0)
1198                         interruptible_sleep_on(&dev->drv[drvidx]->snd_waitq[chidx]);
1199                 goto out;
1200         }
1201         if (minor <= ISDN_MINOR_CTRLMAX) {
1202                 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1203                 if (drvidx < 0) {
1204                         retval = -ENODEV;
1205                         goto out;
1206                 }
1207                 /*
1208                  * We want to use the isdnctrl device to load the firmware
1209                  *
1210                  if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1211                  return -ENODEV;
1212                  */
1213                 if (dev->drv[drvidx]->interface->writecmd)
1214                         retval = dev->drv[drvidx]->interface->
1215                                 writecmd(buf, count, drvidx,
1216                                 isdn_minor2chan(minor - ISDN_MINOR_CTRL));
1217                 else
1218                         retval = count;
1219                 goto out;
1220         }
1221 #ifdef CONFIG_ISDN_PPP
1222         if (minor <= ISDN_MINOR_PPPMAX) {
1223                 retval = isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count);
1224                 goto out;
1225         }
1226 #endif
1227         retval = -ENODEV;
1228  out:
1229         mutex_unlock(&isdn_mutex);
1230         return retval;
1231 }
1232
1233 static unsigned int
1234 isdn_poll(struct file *file, poll_table * wait)
1235 {
1236         unsigned int mask = 0;
1237         unsigned int minor = iminor(file->f_path.dentry->d_inode);
1238         int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1239
1240         mutex_lock(&isdn_mutex);
1241         if (minor == ISDN_MINOR_STATUS) {
1242                 poll_wait(file, &(dev->info_waitq), wait);
1243                 /* mask = POLLOUT | POLLWRNORM; */
1244                 if (file->private_data) {
1245                         mask |= POLLIN | POLLRDNORM;
1246                 }
1247                 goto out;
1248         }
1249         if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
1250                 if (drvidx < 0) {
1251                         /* driver deregistered while file open */
1252                         mask = POLLHUP;
1253                         goto out;
1254                 }
1255                 poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
1256                 mask = POLLOUT | POLLWRNORM;
1257                 if (dev->drv[drvidx]->stavail) {
1258                         mask |= POLLIN | POLLRDNORM;
1259                 }
1260                 goto out;
1261         }
1262 #ifdef CONFIG_ISDN_PPP
1263         if (minor <= ISDN_MINOR_PPPMAX) {
1264                 mask = isdn_ppp_poll(file, wait);
1265                 goto out;
1266         }
1267 #endif
1268         mask = POLLERR;
1269  out:
1270         mutex_unlock(&isdn_mutex);
1271         return mask;
1272 }
1273
1274
1275 static int
1276 isdn_ioctl(struct file *file, uint cmd, ulong arg)
1277 {
1278         uint minor = iminor(file->f_path.dentry->d_inode);
1279         isdn_ctrl c;
1280         int drvidx;
1281         int chidx;
1282         int ret;
1283         int i;
1284         char __user *p;
1285         char *s;
1286         union iocpar {
1287                 char name[10];
1288                 char bname[22];
1289                 isdn_ioctl_struct iocts;
1290                 isdn_net_ioctl_phone phone;
1291                 isdn_net_ioctl_cfg cfg;
1292         } iocpar;
1293         void __user *argp = (void __user *)arg;
1294
1295 #define name  iocpar.name
1296 #define bname iocpar.bname
1297 #define iocts iocpar.iocts
1298 #define phone iocpar.phone
1299 #define cfg   iocpar.cfg
1300
1301         if (minor == ISDN_MINOR_STATUS) {
1302                 switch (cmd) {
1303                         case IIOCGETDVR:
1304                                 return (TTY_DV +
1305                                         (NET_DV << 8) +
1306                                         (INF_DV << 16));
1307                         case IIOCGETCPS:
1308                                 if (arg) {
1309                                         ulong __user *p = argp;
1310                                         int i;
1311                                         if (!access_ok(VERIFY_WRITE, p,
1312                                                         sizeof(ulong) * ISDN_MAX_CHANNELS * 2))
1313                                                 return -EFAULT;
1314                                         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1315                                                 put_user(dev->ibytes[i], p++);
1316                                                 put_user(dev->obytes[i], p++);
1317                                         }
1318                                         return 0;
1319                                 } else
1320                                         return -EINVAL;
1321                                 break;
1322 #ifdef CONFIG_NETDEVICES
1323                         case IIOCNETGPN:
1324                                 /* Get peer phone number of a connected
1325                                  * isdn network interface */
1326                                 if (arg) {
1327                                         if (copy_from_user(&phone, argp, sizeof(phone)))
1328                                                 return -EFAULT;
1329                                         return isdn_net_getpeer(&phone, argp);
1330                                 } else
1331                                         return -EINVAL;
1332 #endif
1333                         default:
1334                                 return -EINVAL;
1335                 }
1336         }
1337         if (!dev->drivers)
1338                 return -ENODEV;
1339         if (minor <= ISDN_MINOR_BMAX) {
1340                 drvidx = isdn_minor2drv(minor);
1341                 if (drvidx < 0)
1342                         return -ENODEV;
1343                 chidx = isdn_minor2chan(minor);
1344                 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1345                         return -ENODEV;
1346                 return 0;
1347         }
1348         if (minor <= ISDN_MINOR_CTRLMAX) {
1349 /*
1350  * isdn net devices manage lots of configuration variables as linked lists.
1351  * Those lists must only be manipulated from user space. Some of the ioctl's
1352  * service routines access user space and are not atomic. Therefore, ioctl's
1353  * manipulating the lists and ioctl's sleeping while accessing the lists
1354  * are serialized by means of a semaphore.
1355  */
1356                 switch (cmd) {
1357                         case IIOCNETDWRSET:
1358                                 printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
1359                                 return(-EINVAL);
1360                         case IIOCNETLCR:
1361                                 printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
1362                                 return -ENODEV;
1363 #ifdef CONFIG_NETDEVICES
1364                         case IIOCNETAIF:
1365                                 /* Add a network-interface */
1366                                 if (arg) {
1367                                         if (copy_from_user(name, argp, sizeof(name)))
1368                                                 return -EFAULT;
1369                                         s = name;
1370                                 } else {
1371                                         s = NULL;
1372                                 }
1373                                 ret = mutex_lock_interruptible(&dev->mtx);
1374                                 if( ret ) return ret;
1375                                 if ((s = isdn_net_new(s, NULL))) {
1376                                         if (copy_to_user(argp, s, strlen(s) + 1)){
1377                                                 ret = -EFAULT;
1378                                         } else {
1379                                                 ret = 0;
1380                                         }
1381                                 } else
1382                                         ret = -ENODEV;
1383                                 mutex_unlock(&dev->mtx);
1384                                 return ret;
1385                         case IIOCNETASL:
1386                                 /* Add a slave to a network-interface */
1387                                 if (arg) {
1388                                         if (copy_from_user(bname, argp, sizeof(bname) - 1))
1389                                                 return -EFAULT;
1390                                 } else
1391                                         return -EINVAL;
1392                                 ret = mutex_lock_interruptible(&dev->mtx);
1393                                 if( ret ) return ret;
1394                                 if ((s = isdn_net_newslave(bname))) {
1395                                         if (copy_to_user(argp, s, strlen(s) + 1)){
1396                                                 ret = -EFAULT;
1397                                         } else {
1398                                                 ret = 0;
1399                                         }
1400                                 } else
1401                                         ret = -ENODEV;
1402                                 mutex_unlock(&dev->mtx);
1403                                 return ret;
1404                         case IIOCNETDIF:
1405                                 /* Delete a network-interface */
1406                                 if (arg) {
1407                                         if (copy_from_user(name, argp, sizeof(name)))
1408                                                 return -EFAULT;
1409                                         ret = mutex_lock_interruptible(&dev->mtx);
1410                                         if( ret ) return ret;
1411                                         ret = isdn_net_rm(name);
1412                                         mutex_unlock(&dev->mtx);
1413                                         return ret;
1414                                 } else
1415                                         return -EINVAL;
1416                         case IIOCNETSCF:
1417                                 /* Set configurable parameters of a network-interface */
1418                                 if (arg) {
1419                                         if (copy_from_user(&cfg, argp, sizeof(cfg)))
1420                                                 return -EFAULT;
1421                                         return isdn_net_setcfg(&cfg);
1422                                 } else
1423                                         return -EINVAL;
1424                         case IIOCNETGCF:
1425                                 /* Get configurable parameters of a network-interface */
1426                                 if (arg) {
1427                                         if (copy_from_user(&cfg, argp, sizeof(cfg)))
1428                                                 return -EFAULT;
1429                                         if (!(ret = isdn_net_getcfg(&cfg))) {
1430                                                 if (copy_to_user(argp, &cfg, sizeof(cfg)))
1431                                                         return -EFAULT;
1432                                         }
1433                                         return ret;
1434                                 } else
1435                                         return -EINVAL;
1436                         case IIOCNETANM:
1437                                 /* Add a phone-number to a network-interface */
1438                                 if (arg) {
1439                                         if (copy_from_user(&phone, argp, sizeof(phone)))
1440                                                 return -EFAULT;
1441                                         ret = mutex_lock_interruptible(&dev->mtx);
1442                                         if( ret ) return ret;
1443                                         ret = isdn_net_addphone(&phone);
1444                                         mutex_unlock(&dev->mtx);
1445                                         return ret;
1446                                 } else
1447                                         return -EINVAL;
1448                         case IIOCNETGNM:
1449                                 /* Get list of phone-numbers of a network-interface */
1450                                 if (arg) {
1451                                         if (copy_from_user(&phone, argp, sizeof(phone)))
1452                                                 return -EFAULT;
1453                                         ret = mutex_lock_interruptible(&dev->mtx);
1454                                         if( ret ) return ret;
1455                                         ret = isdn_net_getphones(&phone, argp);
1456                                         mutex_unlock(&dev->mtx);
1457                                         return ret;
1458                                 } else
1459                                         return -EINVAL;
1460                         case IIOCNETDNM:
1461                                 /* Delete a phone-number of a network-interface */
1462                                 if (arg) {
1463                                         if (copy_from_user(&phone, argp, sizeof(phone)))
1464                                                 return -EFAULT;
1465                                         ret = mutex_lock_interruptible(&dev->mtx);
1466                                         if( ret ) return ret;
1467                                         ret = isdn_net_delphone(&phone);
1468                                         mutex_unlock(&dev->mtx);
1469                                         return ret;
1470                                 } else
1471                                         return -EINVAL;
1472                         case IIOCNETDIL:
1473                                 /* Force dialing of a network-interface */
1474                                 if (arg) {
1475                                         if (copy_from_user(name, argp, sizeof(name)))
1476                                                 return -EFAULT;
1477                                         return isdn_net_force_dial(name);
1478                                 } else
1479                                         return -EINVAL;
1480 #ifdef CONFIG_ISDN_PPP
1481                         case IIOCNETALN:
1482                                 if (!arg)
1483                                         return -EINVAL;
1484                                 if (copy_from_user(name, argp, sizeof(name)))
1485                                         return -EFAULT;
1486                                 return isdn_ppp_dial_slave(name);
1487                         case IIOCNETDLN:
1488                                 if (!arg)
1489                                         return -EINVAL;
1490                                 if (copy_from_user(name, argp, sizeof(name)))
1491                                         return -EFAULT;
1492                                 return isdn_ppp_hangup_slave(name);
1493 #endif
1494                         case IIOCNETHUP:
1495                                 /* Force hangup of a network-interface */
1496                                 if (!arg)
1497                                         return -EINVAL;
1498                                 if (copy_from_user(name, argp, sizeof(name)))
1499                                         return -EFAULT;
1500                                 return isdn_net_force_hangup(name);
1501                                 break;
1502 #endif                          /* CONFIG_NETDEVICES */
1503                         case IIOCSETVER:
1504                                 dev->net_verbose = arg;
1505                                 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1506                                 return 0;
1507                         case IIOCSETGST:
1508                                 if (arg)
1509                                         dev->global_flags |= ISDN_GLOBAL_STOPPED;
1510                                 else
1511                                         dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1512                                 printk(KERN_INFO "isdn: Global Mode %s\n",
1513                                        (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1514                                 return 0;
1515                         case IIOCSETBRJ:
1516                                 drvidx = -1;
1517                                 if (arg) {
1518                                         int i;
1519                                         char *p;
1520                                         if (copy_from_user(&iocts, argp,
1521                                              sizeof(isdn_ioctl_struct)))
1522                                                 return -EFAULT;
1523                                         iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1524                                         if (strlen(iocts.drvid)) {
1525                                                 if ((p = strchr(iocts.drvid, ',')))
1526                                                         *p = 0;
1527                                                 drvidx = -1;
1528                                                 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1529                                                         if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1530                                                                 drvidx = i;
1531                                                                 break;
1532                                                         }
1533                                         }
1534                                 }
1535                                 if (drvidx == -1)
1536                                         return -ENODEV;
1537                                 if (iocts.arg)
1538                                         dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
1539                                 else
1540                                         dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
1541                                 return 0;
1542                         case IIOCSIGPRF:
1543                                 dev->profd = current;
1544                                 return 0;
1545                                 break;
1546                         case IIOCGETPRF:
1547                                 /* Get all Modem-Profiles */
1548                                 if (arg) {
1549                                         char __user *p = argp;
1550                                         int i;
1551
1552                                         if (!access_ok(VERIFY_WRITE, argp,
1553                                         (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1554                                                    * ISDN_MAX_CHANNELS))
1555                                                 return -EFAULT;
1556
1557                                         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1558                                                 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1559                                                       ISDN_MODEM_NUMREG))
1560                                                         return -EFAULT;
1561                                                 p += ISDN_MODEM_NUMREG;
1562                                                 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1563                                                         return -EFAULT;
1564                                                 p += ISDN_MSNLEN;
1565                                                 if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
1566                                                         return -EFAULT;
1567                                                 p += ISDN_LMSNLEN;
1568                                         }
1569                                         return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
1570                                 } else
1571                                         return -EINVAL;
1572                                 break;
1573                         case IIOCSETPRF:
1574                                 /* Set all Modem-Profiles */
1575                                 if (arg) {
1576                                         char __user *p = argp;
1577                                         int i;
1578
1579                                         if (!access_ok(VERIFY_READ, argp,
1580                                         (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1581                                                    * ISDN_MAX_CHANNELS))
1582                                                 return -EFAULT;
1583
1584                                         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1585                                                 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1586                                                      ISDN_MODEM_NUMREG))
1587                                                         return -EFAULT;
1588                                                 p += ISDN_MODEM_NUMREG;
1589                                                 if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
1590                                                         return -EFAULT;
1591                                                 p += ISDN_LMSNLEN;
1592                                                 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1593                                                         return -EFAULT;
1594                                                 p += ISDN_MSNLEN;
1595                                         }
1596                                         return 0;
1597                                 } else
1598                                         return -EINVAL;
1599                                 break;
1600                         case IIOCSETMAP:
1601                         case IIOCGETMAP:
1602                                 /* Set/Get MSN->EAZ-Mapping for a driver */
1603                                 if (arg) {
1604
1605                                         if (copy_from_user(&iocts, argp,
1606                                              sizeof(isdn_ioctl_struct)))
1607                                                 return -EFAULT;
1608                                         iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1609                                         if (strlen(iocts.drvid)) {
1610                                                 drvidx = -1;
1611                                                 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1612                                                         if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1613                                                                 drvidx = i;
1614                                                                 break;
1615                                                         }
1616                                         } else
1617                                                 drvidx = 0;
1618                                         if (drvidx == -1)
1619                                                 return -ENODEV;
1620                                         if (cmd == IIOCSETMAP) {
1621                                                 int loop = 1;
1622
1623                                                 p = (char __user *) iocts.arg;
1624                                                 i = 0;
1625                                                 while (loop) {
1626                                                         int j = 0;
1627
1628                                                         while (1) {
1629                                                                 if (!access_ok(VERIFY_READ, p, 1))
1630                                                                         return -EFAULT;
1631                                                                 get_user(bname[j], p++);
1632                                                                 switch (bname[j]) {
1633                                                                         case '\0':
1634                                                                                 loop = 0;
1635                                                                                 /* Fall through */
1636                                                                         case ',':
1637                                                                                 bname[j] = '\0';
1638                                                                                 strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
1639                                                                                 j = ISDN_MSNLEN;
1640                                                                                 break;
1641                                                                         default:
1642                                                                                 j++;
1643                                                                 }
1644                                                                 if (j >= ISDN_MSNLEN)
1645                                                                         break;
1646                                                         }
1647                                                         if (++i > 9)
1648                                                                 break;
1649                                                 }
1650                                         } else {
1651                                                 p = (char __user *) iocts.arg;
1652                                                 for (i = 0; i < 10; i++) {
1653                                                         snprintf(bname, sizeof(bname), "%s%s",
1654                                                                 strlen(dev->drv[drvidx]->msn2eaz[i]) ?
1655                                                                 dev->drv[drvidx]->msn2eaz[i] : "_",
1656                                                                 (i < 9) ? "," : "\0");
1657                                                         if (copy_to_user(p, bname, strlen(bname) + 1))
1658                                                                 return -EFAULT;
1659                                                         p += strlen(bname);
1660                                                 }
1661                                         }
1662                                         return 0;
1663                                 } else
1664                                         return -EINVAL;
1665                         case IIOCDBGVAR:
1666                                 if (arg) {
1667                                         if (copy_to_user(argp, &dev, sizeof(ulong)))
1668                                                 return -EFAULT;
1669                                         return 0;
1670                                 } else
1671                                         return -EINVAL;
1672                                 break;
1673                         default:
1674                                 if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
1675                                         cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
1676                                 else
1677                                         return -EINVAL;
1678                                 if (arg) {
1679                                         int i;
1680                                         char *p;
1681                                         if (copy_from_user(&iocts, argp, sizeof(isdn_ioctl_struct)))
1682                                                 return -EFAULT;
1683                                         iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1684                                         if (strlen(iocts.drvid)) {
1685                                                 if ((p = strchr(iocts.drvid, ',')))
1686                                                         *p = 0;
1687                                                 drvidx = -1;
1688                                                 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1689                                                         if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1690                                                                 drvidx = i;
1691                                                                 break;
1692                                                         }
1693                                         } else
1694                                                 drvidx = 0;
1695                                         if (drvidx == -1)
1696                                                 return -ENODEV;
1697                                         if (!access_ok(VERIFY_WRITE, argp,
1698                                              sizeof(isdn_ioctl_struct)))
1699                                                 return -EFAULT;
1700                                         c.driver = drvidx;
1701                                         c.command = ISDN_CMD_IOCTL;
1702                                         c.arg = cmd;
1703                                         memcpy(c.parm.num, &iocts.arg, sizeof(ulong));
1704                                         ret = isdn_command(&c);
1705                                         memcpy(&iocts.arg, c.parm.num, sizeof(ulong));
1706                                         if (copy_to_user(argp, &iocts, sizeof(isdn_ioctl_struct)))
1707                                                 return -EFAULT;
1708                                         return ret;
1709                                 } else
1710                                         return -EINVAL;
1711                 }
1712         }
1713 #ifdef CONFIG_ISDN_PPP
1714         if (minor <= ISDN_MINOR_PPPMAX)
1715                 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1716 #endif
1717         return -ENODEV;
1718
1719 #undef name
1720 #undef bname
1721 #undef iocts
1722 #undef phone
1723 #undef cfg
1724 }
1725
1726 static long
1727 isdn_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1728 {
1729         int ret;
1730
1731         mutex_lock(&isdn_mutex);
1732         ret = isdn_ioctl(file, cmd, arg);
1733         mutex_unlock(&isdn_mutex);
1734
1735         return ret;
1736 }
1737
1738 /*
1739  * Open the device code.
1740  */
1741 static int
1742 isdn_open(struct inode *ino, struct file *filep)
1743 {
1744         uint minor = iminor(ino);
1745         int drvidx;
1746         int chidx;
1747         int retval = -ENODEV;
1748
1749         mutex_lock(&isdn_mutex);
1750         if (minor == ISDN_MINOR_STATUS) {
1751                 infostruct *p;
1752
1753                 if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1754                         p->next = (char *) dev->infochain;
1755                         p->private = (char *) &(filep->private_data);
1756                         dev->infochain = p;
1757                         /* At opening we allow a single update */
1758                         filep->private_data = (char *) 1;
1759                         retval = 0;
1760                         goto out;
1761                 } else {
1762                         retval = -ENOMEM;
1763                         goto out;
1764                 }
1765         }
1766         if (!dev->channels)
1767                 goto out;
1768         if (minor <= ISDN_MINOR_BMAX) {
1769                 printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
1770                 drvidx = isdn_minor2drv(minor);
1771                 if (drvidx < 0)
1772                         goto out;
1773                 chidx = isdn_minor2chan(minor);
1774                 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1775                         goto out;
1776                 if (!(dev->drv[drvidx]->online & (1 << chidx)))
1777                         goto out;
1778                 isdn_lock_drivers();
1779                 retval = 0;
1780                 goto out;
1781         }
1782         if (minor <= ISDN_MINOR_CTRLMAX) {
1783                 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1784                 if (drvidx < 0)
1785                         goto out;
1786                 isdn_lock_drivers();
1787                 retval = 0;
1788                 goto out;
1789         }
1790 #ifdef CONFIG_ISDN_PPP
1791         if (minor <= ISDN_MINOR_PPPMAX) {
1792                 retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
1793                 if (retval == 0)
1794                         isdn_lock_drivers();
1795                 goto out;
1796         }
1797 #endif
1798  out:
1799         nonseekable_open(ino, filep);
1800         mutex_unlock(&isdn_mutex);
1801         return retval;
1802 }
1803
1804 static int
1805 isdn_close(struct inode *ino, struct file *filep)
1806 {
1807         uint minor = iminor(ino);
1808
1809         mutex_lock(&isdn_mutex);
1810         if (minor == ISDN_MINOR_STATUS) {
1811                 infostruct *p = dev->infochain;
1812                 infostruct *q = NULL;
1813
1814                 while (p) {
1815                         if (p->private == (char *) &(filep->private_data)) {
1816                                 if (q)
1817                                         q->next = p->next;
1818                                 else
1819                                         dev->infochain = (infostruct *) (p->next);
1820                                 kfree(p);
1821                                 goto out;
1822                         }
1823                         q = p;
1824                         p = (infostruct *) (p->next);
1825                 }
1826                 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1827                 goto out;
1828         }
1829         isdn_unlock_drivers();
1830         if (minor <= ISDN_MINOR_BMAX)
1831                 goto out;
1832         if (minor <= ISDN_MINOR_CTRLMAX) {
1833                 if (dev->profd == current)
1834                         dev->profd = NULL;
1835                 goto out;
1836         }
1837 #ifdef CONFIG_ISDN_PPP
1838         if (minor <= ISDN_MINOR_PPPMAX)
1839                 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1840 #endif
1841
1842  out:
1843         mutex_unlock(&isdn_mutex);
1844         return 0;
1845 }
1846
1847 static const struct file_operations isdn_fops =
1848 {
1849         .owner          = THIS_MODULE,
1850         .llseek         = no_llseek,
1851         .read           = isdn_read,
1852         .write          = isdn_write,
1853         .poll           = isdn_poll,
1854         .unlocked_ioctl = isdn_unlocked_ioctl,
1855         .open           = isdn_open,
1856         .release        = isdn_close,
1857 };
1858
1859 char *
1860 isdn_map_eaz2msn(char *msn, int di)
1861 {
1862         isdn_driver_t *this = dev->drv[di];
1863         int i;
1864
1865         if (strlen(msn) == 1) {
1866                 i = msn[0] - '0';
1867                 if ((i >= 0) && (i <= 9))
1868                         if (strlen(this->msn2eaz[i]))
1869                                 return (this->msn2eaz[i]);
1870         }
1871         return (msn);
1872 }
1873
1874 /*
1875  * Find an unused ISDN-channel, whose feature-flags match the
1876  * given L2- and L3-protocols.
1877  */
1878 #define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038))
1879
1880 /*
1881  * This function must be called with holding the dev->lock.
1882  */
1883 int
1884 isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1885                       ,int pre_chan, char *msn)
1886 {
1887         int i;
1888         ulong features;
1889         ulong vfeatures;
1890
1891         features = ((1 << l2_proto) | (0x10000 << l3_proto));
1892         vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1893                      ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038));
1894         /* If Layer-2 protocol is V.110, accept drivers with
1895          * transparent feature even if these don't support V.110
1896          * because we can emulate this in linklevel.
1897          */
1898         for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1899                 if (USG_NONE(dev->usage[i]) &&
1900                     (dev->drvmap[i] != -1)) {
1901                         int d = dev->drvmap[i];
1902                         if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1903                         ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1904                                 continue;
1905                         if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
1906                                 continue;
1907                         if (dev->usage[i] & ISDN_USAGE_DISABLED)
1908                                 continue; /* usage not allowed */
1909                         if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
1910                                 if (((dev->drv[d]->interface->features & features) == features) ||
1911                                     (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1912                                      (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1913                                         if ((pre_dev < 0) || (pre_chan < 0)) {
1914                                                 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1915                                                 dev->usage[i] |= usage;
1916                                                 isdn_info_update();
1917                                                 return i;
1918                                         } else {
1919                                                 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1920                                                         dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1921                                                         dev->usage[i] |= usage;
1922                                                         isdn_info_update();
1923                                                         return i;
1924                                                 }
1925                                         }
1926                                 }
1927                         }
1928                 }
1929         return -1;
1930 }
1931
1932 /*
1933  * Set state of ISDN-channel to 'unused'
1934  */
1935 void
1936 isdn_free_channel(int di, int ch, int usage)
1937 {
1938         int i;
1939
1940         if ((di < 0) || (ch < 0)) {
1941                 printk(KERN_WARNING "%s: called with invalid drv(%d) or channel(%d)\n",
1942                         __func__, di, ch);
1943                 return;
1944         }
1945         for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1946                 if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
1947                     (dev->drvmap[i] == di) &&
1948                     (dev->chanmap[i] == ch)) {
1949                         dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1950                         strcpy(dev->num[i], "???");
1951                         dev->ibytes[i] = 0;
1952                         dev->obytes[i] = 0;
1953 // 20.10.99 JIM, try to reinitialize v110 !
1954                         dev->v110emu[i] = 0;
1955                         atomic_set(&(dev->v110use[i]), 0);
1956                         isdn_v110_close(dev->v110[i]);
1957                         dev->v110[i] = NULL;
1958 // 20.10.99 JIM, try to reinitialize v110 !
1959                         isdn_info_update();
1960                         if (dev->drv[di])
1961                                 skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
1962                 }
1963 }
1964
1965 /*
1966  * Cancel Exclusive-Flag for ISDN-channel
1967  */
1968 void
1969 isdn_unexclusive_channel(int di, int ch)
1970 {
1971         int i;
1972
1973         for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1974                 if ((dev->drvmap[i] == di) &&
1975                     (dev->chanmap[i] == ch)) {
1976                         dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1977                         isdn_info_update();
1978                         return;
1979                 }
1980 }
1981
1982 /*
1983  *  writebuf replacement for SKB_ABLE drivers
1984  */
1985 static int
1986 isdn_writebuf_stub(int drvidx, int chan, const u_char __user * buf, int len)
1987 {
1988         int ret;
1989         int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1990         struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1991
1992         if (!skb)
1993                 return -ENOMEM;
1994         skb_reserve(skb, hl);
1995         if (copy_from_user(skb_put(skb, len), buf, len)) {
1996                 dev_kfree_skb(skb);
1997                 return -EFAULT;
1998         }
1999         ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
2000         if (ret <= 0)
2001                 dev_kfree_skb(skb);
2002         if (ret > 0)
2003                 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
2004         return ret;
2005 }
2006
2007 /*
2008  * Return: length of data on success, -ERRcode on failure.
2009  */
2010 int
2011 isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
2012 {
2013         int ret;
2014         struct sk_buff *nskb = NULL;
2015         int v110_ret = skb->len;
2016         int idx = isdn_dc2minor(drvidx, chan);
2017
2018         if (dev->v110[idx]) {
2019                 atomic_inc(&dev->v110use[idx]);
2020                 nskb = isdn_v110_encode(dev->v110[idx], skb);
2021                 atomic_dec(&dev->v110use[idx]);
2022                 if (!nskb)
2023                         return 0;
2024                 v110_ret = *((int *)nskb->data);
2025                 skb_pull(nskb, sizeof(int));
2026                 if (!nskb->len) {
2027                         dev_kfree_skb(nskb);
2028                         return v110_ret;
2029                 }
2030                 /* V.110 must always be acknowledged */
2031                 ack = 1;
2032                 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
2033         } else {
2034                 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
2035
2036                 if( skb_headroom(skb) < hl ){
2037                         /*
2038                          * This should only occur when new HL driver with
2039                          * increased hl_hdrlen was loaded after netdevice
2040                          * was created and connected to the new driver.
2041                          *
2042                          * The V.110 branch (re-allocates on its own) does
2043                          * not need this
2044                          */
2045                         struct sk_buff * skb_tmp;
2046
2047                         skb_tmp = skb_realloc_headroom(skb, hl);
2048                         printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
2049                         if (!skb_tmp) return -ENOMEM; /* 0 better? */
2050                         ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
2051                         if( ret > 0 ){
2052                                 dev_kfree_skb(skb);
2053                         } else {
2054                                 dev_kfree_skb(skb_tmp);
2055                         }
2056                 } else {
2057                         ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
2058                 }
2059         }
2060         if (ret > 0) {
2061                 dev->obytes[idx] += ret;
2062                 if (dev->v110[idx]) {
2063                         atomic_inc(&dev->v110use[idx]);
2064                         dev->v110[idx]->skbuser++;
2065                         atomic_dec(&dev->v110use[idx]);
2066                         /* For V.110 return unencoded data length */
2067                         ret = v110_ret;
2068                         /* if the complete frame was send we free the skb;
2069                            if not upper function will requeue the skb */
2070                         if (ret == skb->len)
2071                                 dev_kfree_skb(skb);
2072                 }
2073         } else
2074                 if (dev->v110[idx])
2075                         dev_kfree_skb(nskb);
2076         return ret;
2077 }
2078
2079 static int
2080 isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
2081 {
2082         int j, k, m;
2083
2084         init_waitqueue_head(&d->st_waitq);
2085         if (d->flags & DRV_FLAG_RUNNING)
2086                 return -1;
2087         if (n < 1) return 0;
2088
2089         m = (adding) ? d->channels + n : n;
2090
2091         if (dev->channels + n > ISDN_MAX_CHANNELS) {
2092                 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
2093                        ISDN_MAX_CHANNELS);
2094                 return -1;
2095         }
2096
2097         if ((adding) && (d->rcverr))
2098                 kfree(d->rcverr);
2099         if (!(d->rcverr = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2100                 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
2101                 return -1;
2102         }
2103
2104         if ((adding) && (d->rcvcount))
2105                 kfree(d->rcvcount);
2106         if (!(d->rcvcount = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2107                 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
2108                 if (!adding)
2109                         kfree(d->rcverr);
2110                 return -1;
2111         }
2112
2113         if ((adding) && (d->rpqueue)) {
2114                 for (j = 0; j < d->channels; j++)
2115                         skb_queue_purge(&d->rpqueue[j]);
2116                 kfree(d->rpqueue);
2117         }
2118         if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_ATOMIC))) {
2119                 printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
2120                 if (!adding) {
2121                         kfree(d->rcvcount);
2122                         kfree(d->rcverr);
2123                 }
2124                 return -1;
2125         }
2126         for (j = 0; j < m; j++) {
2127                 skb_queue_head_init(&d->rpqueue[j]);
2128         }
2129
2130         if ((adding) && (d->rcv_waitq))
2131                 kfree(d->rcv_waitq);
2132         d->rcv_waitq = kmalloc(sizeof(wait_queue_head_t) * 2 * m, GFP_ATOMIC);
2133         if (!d->rcv_waitq) {
2134                 printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
2135                 if (!adding) {
2136                         kfree(d->rpqueue);
2137                         kfree(d->rcvcount);
2138                         kfree(d->rcverr);
2139                 }
2140                 return -1;
2141         }
2142         d->snd_waitq = d->rcv_waitq + m;
2143         for (j = 0; j < m; j++) {
2144                 init_waitqueue_head(&d->rcv_waitq[j]);
2145                 init_waitqueue_head(&d->snd_waitq[j]);
2146         }
2147
2148         dev->channels += n;
2149         for (j = d->channels; j < m; j++)
2150                 for (k = 0; k < ISDN_MAX_CHANNELS; k++)
2151                         if (dev->chanmap[k] < 0) {
2152                                 dev->chanmap[k] = j;
2153                                 dev->drvmap[k] = drvidx;
2154                                 break;
2155                         }
2156         d->channels = m;
2157         return 0;
2158 }
2159
2160 /*
2161  * Low-level-driver registration
2162  */
2163
2164 static void
2165 set_global_features(void)
2166 {
2167         int drvidx;
2168
2169         dev->global_features = 0;
2170         for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
2171                 if (!dev->drv[drvidx])
2172                         continue;
2173                 if (dev->drv[drvidx]->interface)
2174                         dev->global_features |= dev->drv[drvidx]->interface->features;
2175         }
2176 }
2177
2178 #ifdef CONFIG_ISDN_DIVERSION
2179
2180 static char *map_drvname(int di)
2181 {
2182   if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
2183     return(NULL);
2184   return(dev->drvid[di]); /* driver name */
2185 } /* map_drvname */
2186
2187 static int map_namedrv(char *id)
2188 {  int i;
2189
2190    for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2191     { if (!strcmp(dev->drvid[i],id))
2192         return(i);
2193     }
2194    return(-1);
2195 } /* map_namedrv */
2196
2197 int DIVERT_REG_NAME(isdn_divert_if *i_div)
2198 {
2199   if (i_div->if_magic != DIVERT_IF_MAGIC)
2200     return(DIVERT_VER_ERR);
2201   switch (i_div->cmd)
2202     {
2203       case DIVERT_CMD_REL:
2204         if (divert_if != i_div)
2205           return(DIVERT_REL_ERR);
2206         divert_if = NULL; /* free interface */
2207         return(DIVERT_NO_ERR);
2208
2209       case DIVERT_CMD_REG:
2210         if (divert_if)
2211           return(DIVERT_REG_ERR);
2212         i_div->ll_cmd = isdn_command; /* set command function */
2213         i_div->drv_to_name = map_drvname;
2214         i_div->name_to_drv = map_namedrv;
2215         divert_if = i_div; /* remember interface */
2216         return(DIVERT_NO_ERR);
2217
2218       default:
2219         return(DIVERT_CMD_ERR);
2220     }
2221 } /* DIVERT_REG_NAME */
2222
2223 EXPORT_SYMBOL(DIVERT_REG_NAME);
2224
2225 #endif /* CONFIG_ISDN_DIVERSION */
2226
2227
2228 EXPORT_SYMBOL(register_isdn);
2229 #ifdef CONFIG_ISDN_PPP
2230 EXPORT_SYMBOL(isdn_ppp_register_compressor);
2231 EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
2232 #endif
2233
2234 int
2235 register_isdn(isdn_if * i)
2236 {
2237         isdn_driver_t *d;
2238         int j;
2239         ulong flags;
2240         int drvidx;
2241
2242         if (dev->drivers >= ISDN_MAX_DRIVERS) {
2243                 printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
2244                        ISDN_MAX_DRIVERS);
2245                 return 0;
2246         }
2247         if (!i->writebuf_skb) {
2248                 printk(KERN_WARNING "register_isdn: No write routine given.\n");
2249                 return 0;
2250         }
2251         if (!(d = kzalloc(sizeof(isdn_driver_t), GFP_KERNEL))) {
2252                 printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
2253                 return 0;
2254         }
2255
2256         d->maxbufsize = i->maxbufsize;
2257         d->pktcount = 0;
2258         d->stavail = 0;
2259         d->flags = DRV_FLAG_LOADED;
2260         d->online = 0;
2261         d->interface = i;
2262         d->channels = 0;
2263         spin_lock_irqsave(&dev->lock, flags);
2264         for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2265                 if (!dev->drv[drvidx])
2266                         break;
2267         if (isdn_add_channels(d, drvidx, i->channels, 0)) {
2268                 spin_unlock_irqrestore(&dev->lock, flags);
2269                 kfree(d);
2270                 return 0;
2271         }
2272         i->channels = drvidx;
2273         i->rcvcallb_skb = isdn_receive_skb_callback;
2274         i->statcallb = isdn_status_callback;
2275         if (!strlen(i->id))
2276                 sprintf(i->id, "line%d", drvidx);
2277         for (j = 0; j < drvidx; j++)
2278                 if (!strcmp(i->id, dev->drvid[j]))
2279                         sprintf(i->id, "line%d", drvidx);
2280         dev->drv[drvidx] = d;
2281         strcpy(dev->drvid[drvidx], i->id);
2282         isdn_info_update();
2283         dev->drivers++;
2284         set_global_features();
2285         spin_unlock_irqrestore(&dev->lock, flags);
2286         return 1;
2287 }
2288
2289 /*
2290  *****************************************************************************
2291  * And now the modules code.
2292  *****************************************************************************
2293  */
2294
2295 static char *
2296 isdn_getrev(const char *revision)
2297 {
2298         char *rev;
2299         char *p;
2300
2301         if ((p = strchr(revision, ':'))) {
2302                 rev = p + 2;
2303                 p = strchr(rev, '$');
2304                 *--p = 0;
2305         } else
2306                 rev = "???";
2307         return rev;
2308 }
2309
2310 /*
2311  * Allocate and initialize all data, register modem-devices
2312  */
2313 static int __init isdn_init(void)
2314 {
2315         int i;
2316         char tmprev[50];
2317
2318         if (!(dev = vmalloc(sizeof(isdn_dev)))) {
2319                 printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
2320                 return -EIO;
2321         }
2322         memset((char *) dev, 0, sizeof(isdn_dev));
2323         init_timer(&dev->timer);
2324         dev->timer.function = isdn_timer_funct;
2325         spin_lock_init(&dev->lock);
2326         spin_lock_init(&dev->timerlock);
2327 #ifdef MODULE
2328         dev->owner = THIS_MODULE;
2329 #endif
2330         mutex_init(&dev->mtx);
2331         init_waitqueue_head(&dev->info_waitq);
2332         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2333                 dev->drvmap[i] = -1;
2334                 dev->chanmap[i] = -1;
2335                 dev->m_idx[i] = -1;
2336                 strcpy(dev->num[i], "???");
2337                 init_waitqueue_head(&dev->mdm.info[i].open_wait);
2338                 init_waitqueue_head(&dev->mdm.info[i].close_wait);
2339         }
2340         if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
2341                 printk(KERN_WARNING "isdn: Could not register control devices\n");
2342                 vfree(dev);
2343                 return -EIO;
2344         }
2345         if ((isdn_tty_modem_init()) < 0) {
2346                 printk(KERN_WARNING "isdn: Could not register tty devices\n");
2347                 vfree(dev);
2348                 unregister_chrdev(ISDN_MAJOR, "isdn");
2349                 return -EIO;
2350         }
2351 #ifdef CONFIG_ISDN_PPP
2352         if (isdn_ppp_init() < 0) {
2353                 printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
2354                 isdn_tty_exit();
2355                 unregister_chrdev(ISDN_MAJOR, "isdn");
2356                 vfree(dev);
2357                 return -EIO;
2358         }
2359 #endif                          /* CONFIG_ISDN_PPP */
2360
2361         strcpy(tmprev, isdn_revision);
2362         printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
2363         strcpy(tmprev, isdn_tty_revision);
2364         printk("%s/", isdn_getrev(tmprev));
2365         strcpy(tmprev, isdn_net_revision);
2366         printk("%s/", isdn_getrev(tmprev));
2367         strcpy(tmprev, isdn_ppp_revision);
2368         printk("%s/", isdn_getrev(tmprev));
2369         strcpy(tmprev, isdn_audio_revision);
2370         printk("%s/", isdn_getrev(tmprev));
2371         strcpy(tmprev, isdn_v110_revision);
2372         printk("%s", isdn_getrev(tmprev));
2373
2374 #ifdef MODULE
2375         printk(" loaded\n");
2376 #else
2377         printk("\n");
2378 #endif
2379         isdn_info_update();
2380         return 0;
2381 }
2382
2383 /*
2384  * Unload module
2385  */
2386 static void __exit isdn_exit(void)
2387 {
2388 #ifdef CONFIG_ISDN_PPP
2389         isdn_ppp_cleanup();
2390 #endif
2391         if (isdn_net_rmall() < 0) {
2392                 printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
2393                 return;
2394         }
2395         isdn_tty_exit();
2396         unregister_chrdev(ISDN_MAJOR, "isdn");
2397         del_timer(&dev->timer);
2398         /* call vfree with interrupts enabled, else it will hang */
2399         vfree(dev);
2400         printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
2401 }
2402
2403 module_init(isdn_init);
2404 module_exit(isdn_exit);