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ARM: mach-shmobile: pfc-sh7372: modify wrong comment
[zen-stable.git] / drivers / isdn / i4l / isdn_common.c
blob15632bd2f643cd8c48da2b7d2d6121b6f9d8df1a
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);