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fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / isdn / i4l / isdn_common.c
blobc6df2925ebd0f0e03b2416618d493ddc8951be9c
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/vmalloc.h>
18 #include <linux/isdn.h>
19 #include <linux/smp_lock.h>
20 #include "isdn_common.h"
21 #include "isdn_tty.h"
22 #include "isdn_net.h"
23 #include "isdn_ppp.h"
24 #ifdef CONFIG_ISDN_AUDIO
25 #include "isdn_audio.h"
26 #endif
27 #ifdef CONFIG_ISDN_DIVERSION_MODULE
28 #define CONFIG_ISDN_DIVERSION
29 #endif
30 #ifdef CONFIG_ISDN_DIVERSION
31 #include <linux/isdn_divertif.h>
32 #endif /* CONFIG_ISDN_DIVERSION */
33 #include "isdn_v110.h"
34
35 /* Debugflags */
36 #undef ISDN_DEBUG_STATCALLB
37
38 MODULE_DESCRIPTION("ISDN4Linux: link layer");
39 MODULE_AUTHOR("Fritz Elfert");
40 MODULE_LICENSE("GPL");
41
42 isdn_dev *dev;
43
44 static char *isdn_revision = "$Revision: 1.1.2.3 $";
45
46 extern char *isdn_net_revision;
47 extern char *isdn_tty_revision;
48 #ifdef CONFIG_ISDN_PPP
49 extern char *isdn_ppp_revision;
50 #else
51 static char *isdn_ppp_revision = ": none $";
52 #endif
53 #ifdef CONFIG_ISDN_AUDIO
54 extern char *isdn_audio_revision;
55 #else
56 static char *isdn_audio_revision = ": none $";
57 #endif
58 extern char *isdn_v110_revision;
59
60 #ifdef CONFIG_ISDN_DIVERSION
61 static isdn_divert_if *divert_if; /* = NULL */
62 #endif /* CONFIG_ISDN_DIVERSION */
63
64
65 static int isdn_writebuf_stub(int, int, const u_char __user *, int);
66 static void set_global_features(void);
67 static int isdn_wildmat(char *s, char *p);
68 static int isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding);
69
70 static inline void
71 isdn_lock_driver(isdn_driver_t *drv)
72 {
73 try_module_get(drv->interface->owner);
74 drv->locks++;
75 }
76
77 void
78 isdn_lock_drivers(void)
79 {
80 int i;
81
82 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
83 if (!dev->drv[i])
84 continue;
85 isdn_lock_driver(dev->drv[i]);
86 }
87 }
88
89 static inline void
90 isdn_unlock_driver(isdn_driver_t *drv)
91 {
92 if (drv->locks > 0) {
93 drv->locks--;
94 module_put(drv->interface->owner);
95 }
96 }
97
98 void
99 isdn_unlock_drivers(void)
100 {
101 int i;
102
103 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
104 if (!dev->drv[i])
105 continue;
106 isdn_unlock_driver(dev->drv[i]);
107 }
108 }
109
110 #if defined(ISDN_DEBUG_NET_DUMP) || defined(ISDN_DEBUG_MODEM_DUMP)
111 void
112 isdn_dumppkt(char *s, u_char * p, int len, int dumplen)
113 {
114 int dumpc;
115
116 printk(KERN_DEBUG "%s(%d) ", s, len);
117 for (dumpc = 0; (dumpc < dumplen) && (len); len--, dumpc++)
118 printk(" %02x", *p++);
119 printk("\n");
120 }
121 #endif
122
123 /*
124 * I picked the pattern-matching-functions from an old GNU-tar version (1.10)
125 * It was originally written and put to PD by rs@mirror.TMC.COM (Rich Salz)
126 */
127 static int
128 isdn_star(char *s, char *p)
129 {
130 while (isdn_wildmat(s, p)) {
131 if (*++s == '\0')
132 return (2);
133 }
134 return (0);
135 }
136
137 /*
138 * Shell-type Pattern-matching for incoming caller-Ids
139 * This function gets a string in s and checks, if it matches the pattern
140 * given in p.
141 *
142 * Return:
143 * 0 = match.
144 * 1 = no match.
145 * 2 = no match. Would eventually match, if s would be longer.
146 *
147 * Possible Patterns:
148 *
149 * '?' matches one character
150 * '*' matches zero or more characters
151 * [xyz] matches the set of characters in brackets.
152 * [^xyz] matches any single character not in the set of characters
153 */
154
155 static int
156 isdn_wildmat(char *s, char *p)
157 {
158 register int last;
159 register int matched;
160 register int reverse;
161 register int nostar = 1;
162
163 if (!(*s) && !(*p))
164 return(1);
165 for (; *p; s++, p++)
166 switch (*p) {
167 case '\\':
168 /*
169 * Literal match with following character,
170 * fall through.
171 */
172 p++;
173 default:
174 if (*s != *p)
175 return (*s == '\0')?2:1;
176 continue;
177 case '?':
178 /* Match anything. */
179 if (*s == '\0')
180 return (2);
181 continue;
182 case '*':
183 nostar = 0;
184 /* Trailing star matches everything. */
185 return (*++p ? isdn_star(s, p) : 0);
186 case '[':
187 /* [^....] means inverse character class. */
188 if ((reverse = (p[1] == '^')))
189 p++;
190 for (last = 0, matched = 0; *++p && (*p != ']'); last = *p)
191 /* This next line requires a good C compiler. */
192 if (*p == '-' ? *s <= *++p && *s >= last : *s == *p)
193 matched = 1;
194 if (matched == reverse)
195 return (1);
196 continue;
197 }
198 return (*s == '\0')?0:nostar;
199 }
200
201 int isdn_msncmp( const char * msn1, const char * msn2 )
202 {
203 char TmpMsn1[ ISDN_MSNLEN ];
204 char TmpMsn2[ ISDN_MSNLEN ];
205 char *p;
206
207 for ( p = TmpMsn1; *msn1 && *msn1 != ':'; ) // Strip off a SPID
208 *p++ = *msn1++;
209 *p = '\0';
210
211 for ( p = TmpMsn2; *msn2 && *msn2 != ':'; ) // Strip off a SPID
212 *p++ = *msn2++;
213 *p = '\0';
214
215 return isdn_wildmat( TmpMsn1, TmpMsn2 );
216 }
217
218 int
219 isdn_dc2minor(int di, int ch)
220 {
221 int i;
222 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
223 if (dev->chanmap[i] == ch && dev->drvmap[i] == di)
224 return i;
225 return -1;
226 }
227
228 static int isdn_timer_cnt1 = 0;
229 static int isdn_timer_cnt2 = 0;
230 static int isdn_timer_cnt3 = 0;
231
232 static void
233 isdn_timer_funct(ulong dummy)
234 {
235 int tf = dev->tflags;
236 if (tf & ISDN_TIMER_FAST) {
237 if (tf & ISDN_TIMER_MODEMREAD)
238 isdn_tty_readmodem();
239 if (tf & ISDN_TIMER_MODEMPLUS)
240 isdn_tty_modem_escape();
241 if (tf & ISDN_TIMER_MODEMXMIT)
242 isdn_tty_modem_xmit();
243 }
244 if (tf & ISDN_TIMER_SLOW) {
245 if (++isdn_timer_cnt1 >= ISDN_TIMER_02SEC) {
246 isdn_timer_cnt1 = 0;
247 if (tf & ISDN_TIMER_NETDIAL)
248 isdn_net_dial();
249 }
250 if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) {
251 isdn_timer_cnt2 = 0;
252 if (tf & ISDN_TIMER_NETHANGUP)
253 isdn_net_autohup();
254 if (++isdn_timer_cnt3 >= ISDN_TIMER_RINGING) {
255 isdn_timer_cnt3 = 0;
256 if (tf & ISDN_TIMER_MODEMRING)
257 isdn_tty_modem_ring();
258 }
259 if (tf & ISDN_TIMER_CARRIER)
260 isdn_tty_carrier_timeout();
261 }
262 }
263 if (tf)
264 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
265 }
266
267 void
268 isdn_timer_ctrl(int tf, int onoff)
269 {
270 unsigned long flags;
271 int old_tflags;
272
273 spin_lock_irqsave(&dev->timerlock, flags);
274 if ((tf & ISDN_TIMER_SLOW) && (!(dev->tflags & ISDN_TIMER_SLOW))) {
275 /* If the slow-timer wasn't activated until now */
276 isdn_timer_cnt1 = 0;
277 isdn_timer_cnt2 = 0;
278 }
279 old_tflags = dev->tflags;
280 if (onoff)
281 dev->tflags |= tf;
282 else
283 dev->tflags &= ~tf;
284 if (dev->tflags && !old_tflags)
285 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
286 spin_unlock_irqrestore(&dev->timerlock, flags);
287 }
288
289 /*
290 * Receive a packet from B-Channel. (Called from low-level-module)
291 */
292 static void
293 isdn_receive_skb_callback(int di, int channel, struct sk_buff *skb)
294 {
295 int i;
296
297 if ((i = isdn_dc2minor(di, channel)) == -1) {
298 dev_kfree_skb(skb);
299 return;
300 }
301 /* Update statistics */
302 dev->ibytes[i] += skb->len;
303
304 /* First, try to deliver data to network-device */
305 if (isdn_net_rcv_skb(i, skb))
306 return;
307
308 /* V.110 handling
309 * makes sense for async streams only, so it is
310 * called after possible net-device delivery.
311 */
312 if (dev->v110[i]) {
313 atomic_inc(&dev->v110use[i]);
314 skb = isdn_v110_decode(dev->v110[i], skb);
315 atomic_dec(&dev->v110use[i]);
316 if (!skb)
317 return;
318 }
319
320 /* No network-device found, deliver to tty or raw-channel */
321 if (skb->len) {
322 if (isdn_tty_rcv_skb(i, di, channel, skb))
323 return;
324 wake_up_interruptible(&dev->drv[di]->rcv_waitq[channel]);
325 } else
326 dev_kfree_skb(skb);
327 }
328
329 /*
330 * Intercept command from Linklevel to Lowlevel.
331 * If layer 2 protocol is V.110 and this is not supported by current
332 * lowlevel-driver, use driver's transparent mode and handle V.110 in
333 * linklevel instead.
334 */
335 int
336 isdn_command(isdn_ctrl *cmd)
337 {
338 if (cmd->driver == -1) {
339 printk(KERN_WARNING "isdn_command command(%x) driver -1\n", cmd->command);
340 return(1);
341 }
342 if (!dev->drv[cmd->driver]) {
343 printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d] NULL\n",
344 cmd->command, cmd->driver);
345 return(1);
346 }
347 if (!dev->drv[cmd->driver]->interface) {
348 printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d]->interface NULL\n",
349 cmd->command, cmd->driver);
350 return(1);
351 }
352 if (cmd->command == ISDN_CMD_SETL2) {
353 int idx = isdn_dc2minor(cmd->driver, cmd->arg & 255);
354 unsigned long l2prot = (cmd->arg >> 8) & 255;
355 unsigned long features = (dev->drv[cmd->driver]->interface->features
356 >> ISDN_FEATURE_L2_SHIFT) &
357 ISDN_FEATURE_L2_MASK;
358 unsigned long l2_feature = (1 << l2prot);
359
360 switch (l2prot) {
361 case ISDN_PROTO_L2_V11096:
362 case ISDN_PROTO_L2_V11019:
363 case ISDN_PROTO_L2_V11038:
364 /* If V.110 requested, but not supported by
365 * HL-driver, set emulator-flag and change
366 * Layer-2 to transparent
367 */
368 if (!(features & l2_feature)) {
369 dev->v110emu[idx] = l2prot;
370 cmd->arg = (cmd->arg & 255) |
371 (ISDN_PROTO_L2_TRANS << 8);
372 } else
373 dev->v110emu[idx] = 0;
374 }
375 }
376 return dev->drv[cmd->driver]->interface->command(cmd);
377 }
378
379 void
380 isdn_all_eaz(int di, int ch)
381 {
382 isdn_ctrl cmd;
383
384 if (di < 0)
385 return;
386 cmd.driver = di;
387 cmd.arg = ch;
388 cmd.command = ISDN_CMD_SETEAZ;
389 cmd.parm.num[0] = '\0';
390 isdn_command(&cmd);
391 }
392
393 /*
394 * Begin of a CAPI like LL<->HL interface, currently used only for
395 * supplementary service (CAPI 2.0 part III)
396 */
397 #include <linux/isdn/capicmd.h>
398
399 static int
400 isdn_capi_rec_hl_msg(capi_msg *cm) {
401
402 int di;
403 int ch;
404
405 di = (cm->adr.Controller & 0x7f) -1;
406 ch = isdn_dc2minor(di, (cm->adr.Controller>>8)& 0x7f);
407 switch(cm->Command) {
408 case CAPI_FACILITY:
409 /* in the moment only handled in tty */
410 return(isdn_tty_capi_facility(cm));
411 default:
412 return(-1);
413 }
414 }
415
416 static int
417 isdn_status_callback(isdn_ctrl * c)
418 {
419 int di;
420 u_long flags;
421 int i;
422 int r;
423 int retval = 0;
424 isdn_ctrl cmd;
425 isdn_net_dev *p;
426
427 di = c->driver;
428 i = isdn_dc2minor(di, c->arg);
429 switch (c->command) {
430 case ISDN_STAT_BSENT:
431 if (i < 0)
432 return -1;
433 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
434 return 0;
435 if (isdn_net_stat_callback(i, c))
436 return 0;
437 if (isdn_v110_stat_callback(i, c))
438 return 0;
439 if (isdn_tty_stat_callback(i, c))
440 return 0;
441 wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]);
442 break;
443 case ISDN_STAT_STAVAIL:
444 dev->drv[di]->stavail += c->arg;
445 wake_up_interruptible(&dev->drv[di]->st_waitq);
446 break;
447 case ISDN_STAT_RUN:
448 dev->drv[di]->flags |= DRV_FLAG_RUNNING;
449 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
450 if (dev->drvmap[i] == di)
451 isdn_all_eaz(di, dev->chanmap[i]);
452 set_global_features();
453 break;
454 case ISDN_STAT_STOP:
455 dev->drv[di]->flags &= ~DRV_FLAG_RUNNING;
456 break;
457 case ISDN_STAT_ICALL:
458 if (i < 0)
459 return -1;
460 #ifdef ISDN_DEBUG_STATCALLB
461 printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num);
462 #endif
463 if (dev->global_flags & ISDN_GLOBAL_STOPPED) {
464 cmd.driver = di;
465 cmd.arg = c->arg;
466 cmd.command = ISDN_CMD_HANGUP;
467 isdn_command(&cmd);
468 return 0;
469 }
470 /* Try to find a network-interface which will accept incoming call */
471 r = ((c->command == ISDN_STAT_ICALLW) ? 0 : isdn_net_find_icall(di, c->arg, i, &c->parm.setup));
472 switch (r) {
473 case 0:
474 /* No network-device replies.
475 * Try ttyI's.
476 * These return 0 on no match, 1 on match and
477 * 3 on eventually match, if CID is longer.
478 */
479 if (c->command == ISDN_STAT_ICALL)
480 if ((retval = isdn_tty_find_icall(di, c->arg, &c->parm.setup))) return(retval);
481 #ifdef CONFIG_ISDN_DIVERSION
482 if (divert_if)
483 if ((retval = divert_if->stat_callback(c)))
484 return(retval); /* processed */
485 #endif /* CONFIG_ISDN_DIVERSION */
486 if ((!retval) && (dev->drv[di]->flags & DRV_FLAG_REJBUS)) {
487 /* No tty responding */
488 cmd.driver = di;
489 cmd.arg = c->arg;
490 cmd.command = ISDN_CMD_HANGUP;
491 isdn_command(&cmd);
492 retval = 2;
493 }
494 break;
495 case 1:
496 /* Schedule connection-setup */
497 isdn_net_dial();
498 cmd.driver = di;
499 cmd.arg = c->arg;
500 cmd.command = ISDN_CMD_ACCEPTD;
501 for ( p = dev->netdev; p; p = p->next )
502 if ( p->local->isdn_channel == cmd.arg )
503 {
504 strcpy( cmd.parm.setup.eazmsn, p->local->msn );
505 isdn_command(&cmd);
506 retval = 1;
507 break;
508 }
509 break;
510
511 case 2: /* For calling back, first reject incoming call ... */
512 case 3: /* Interface found, but down, reject call actively */
513 retval = 2;
514 printk(KERN_INFO "isdn: Rejecting Call\n");
515 cmd.driver = di;
516 cmd.arg = c->arg;
517 cmd.command = ISDN_CMD_HANGUP;
518 isdn_command(&cmd);
519 if (r == 3)
520 break;
521 /* Fall through */
522 case 4:
523 /* ... then start callback. */
524 isdn_net_dial();
525 break;
526 case 5:
527 /* Number would eventually match, if longer */
528 retval = 3;
529 break;
530 }
531 #ifdef ISDN_DEBUG_STATCALLB
532 printk(KERN_DEBUG "ICALL: ret=%d\n", retval);
533 #endif
534 return retval;
535 break;
536 case ISDN_STAT_CINF:
537 if (i < 0)
538 return -1;
539 #ifdef ISDN_DEBUG_STATCALLB
540 printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num);
541 #endif
542 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
543 return 0;
544 if (strcmp(c->parm.num, "0"))
545 isdn_net_stat_callback(i, c);
546 isdn_tty_stat_callback(i, c);
547 break;
548 case ISDN_STAT_CAUSE:
549 #ifdef ISDN_DEBUG_STATCALLB
550 printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num);
551 #endif
552 printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n",
553 dev->drvid[di], c->arg, c->parm.num);
554 isdn_tty_stat_callback(i, c);
555 #ifdef CONFIG_ISDN_DIVERSION
556 if (divert_if)
557 divert_if->stat_callback(c);
558 #endif /* CONFIG_ISDN_DIVERSION */
559 break;
560 case ISDN_STAT_DISPLAY:
561 #ifdef ISDN_DEBUG_STATCALLB
562 printk(KERN_DEBUG "DISPLAY: %ld %s\n", c->arg, c->parm.display);
563 #endif
564 isdn_tty_stat_callback(i, c);
565 #ifdef CONFIG_ISDN_DIVERSION
566 if (divert_if)
567 divert_if->stat_callback(c);
568 #endif /* CONFIG_ISDN_DIVERSION */
569 break;
570 case ISDN_STAT_DCONN:
571 if (i < 0)
572 return -1;
573 #ifdef ISDN_DEBUG_STATCALLB
574 printk(KERN_DEBUG "DCONN: %ld\n", c->arg);
575 #endif
576 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
577 return 0;
578 /* Find any net-device, waiting for D-channel setup */
579 if (isdn_net_stat_callback(i, c))
580 break;
581 isdn_v110_stat_callback(i, c);
582 /* Find any ttyI, waiting for D-channel setup */
583 if (isdn_tty_stat_callback(i, c)) {
584 cmd.driver = di;
585 cmd.arg = c->arg;
586 cmd.command = ISDN_CMD_ACCEPTB;
587 isdn_command(&cmd);
588 break;
589 }
590 break;
591 case ISDN_STAT_DHUP:
592 if (i < 0)
593 return -1;
594 #ifdef ISDN_DEBUG_STATCALLB
595 printk(KERN_DEBUG "DHUP: %ld\n", c->arg);
596 #endif
597 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
598 return 0;
599 dev->drv[di]->online &= ~(1 << (c->arg));
600 isdn_info_update();
601 /* Signal hangup to network-devices */
602 if (isdn_net_stat_callback(i, c))
603 break;
604 isdn_v110_stat_callback(i, c);
605 if (isdn_tty_stat_callback(i, c))
606 break;
607 #ifdef CONFIG_ISDN_DIVERSION
608 if (divert_if)
609 divert_if->stat_callback(c);
610 #endif /* CONFIG_ISDN_DIVERSION */
611 break;
612 break;
613 case ISDN_STAT_BCONN:
614 if (i < 0)
615 return -1;
616 #ifdef ISDN_DEBUG_STATCALLB
617 printk(KERN_DEBUG "BCONN: %ld\n", c->arg);
618 #endif
619 /* Signal B-channel-connect to network-devices */
620 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
621 return 0;
622 dev->drv[di]->online |= (1 << (c->arg));
623 isdn_info_update();
624 if (isdn_net_stat_callback(i, c))
625 break;
626 isdn_v110_stat_callback(i, c);
627 if (isdn_tty_stat_callback(i, c))
628 break;
629 break;
630 case ISDN_STAT_BHUP:
631 if (i < 0)
632 return -1;
633 #ifdef ISDN_DEBUG_STATCALLB
634 printk(KERN_DEBUG "BHUP: %ld\n", c->arg);
635 #endif
636 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
637 return 0;
638 dev->drv[di]->online &= ~(1 << (c->arg));
639 isdn_info_update();
640 #ifdef CONFIG_ISDN_X25
641 /* Signal hangup to network-devices */
642 if (isdn_net_stat_callback(i, c))
643 break;
644 #endif
645 isdn_v110_stat_callback(i, c);
646 if (isdn_tty_stat_callback(i, c))
647 break;
648 break;
649 case ISDN_STAT_NODCH:
650 if (i < 0)
651 return -1;
652 #ifdef ISDN_DEBUG_STATCALLB
653 printk(KERN_DEBUG "NODCH: %ld\n", c->arg);
654 #endif
655 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
656 return 0;
657 if (isdn_net_stat_callback(i, c))
658 break;
659 if (isdn_tty_stat_callback(i, c))
660 break;
661 break;
662 case ISDN_STAT_ADDCH:
663 spin_lock_irqsave(&dev->lock, flags);
664 if (isdn_add_channels(dev->drv[di], di, c->arg, 1)) {
665 spin_unlock_irqrestore(&dev->lock, flags);
666 return -1;
667 }
668 spin_unlock_irqrestore(&dev->lock, flags);
669 isdn_info_update();
670 break;
671 case ISDN_STAT_DISCH:
672 spin_lock_irqsave(&dev->lock, flags);
673 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
674 if ((dev->drvmap[i] == di) &&
675 (dev->chanmap[i] == c->arg)) {
676 if (c->parm.num[0])
677 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
678 else
679 if (USG_NONE(dev->usage[i])) {
680 dev->usage[i] |= ISDN_USAGE_DISABLED;
681 }
682 else
683 retval = -1;
684 break;
685 }
686 spin_unlock_irqrestore(&dev->lock, flags);
687 isdn_info_update();
688 break;
689 case ISDN_STAT_UNLOAD:
690 while (dev->drv[di]->locks > 0) {
691 isdn_unlock_driver(dev->drv[di]);
692 }
693 spin_lock_irqsave(&dev->lock, flags);
694 isdn_tty_stat_callback(i, c);
695 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
696 if (dev->drvmap[i] == di) {
697 dev->drvmap[i] = -1;
698 dev->chanmap[i] = -1;
699 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
700 }
701 dev->drivers--;
702 dev->channels -= dev->drv[di]->channels;
703 kfree(dev->drv[di]->rcverr);
704 kfree(dev->drv[di]->rcvcount);
705 for (i = 0; i < dev->drv[di]->channels; i++)
706 skb_queue_purge(&dev->drv[di]->rpqueue[i]);
707 kfree(dev->drv[di]->rpqueue);
708 kfree(dev->drv[di]->rcv_waitq);
709 kfree(dev->drv[di]);
710 dev->drv[di] = NULL;
711 dev->drvid[di][0] = '\0';
712 isdn_info_update();
713 set_global_features();
714 spin_unlock_irqrestore(&dev->lock, flags);
715 return 0;
716 case ISDN_STAT_L1ERR:
717 break;
718 case CAPI_PUT_MESSAGE:
719 return(isdn_capi_rec_hl_msg(&c->parm.cmsg));
720 #ifdef CONFIG_ISDN_TTY_FAX
721 case ISDN_STAT_FAXIND:
722 isdn_tty_stat_callback(i, c);
723 break;
724 #endif
725 #ifdef CONFIG_ISDN_AUDIO
726 case ISDN_STAT_AUDIO:
727 isdn_tty_stat_callback(i, c);
728 break;
729 #endif
730 #ifdef CONFIG_ISDN_DIVERSION
731 case ISDN_STAT_PROT:
732 case ISDN_STAT_REDIR:
733 if (divert_if)
734 return(divert_if->stat_callback(c));
735 #endif /* CONFIG_ISDN_DIVERSION */
736 default:
737 return -1;
738 }
739 return 0;
740 }
741
742 /*
743 * Get integer from char-pointer, set pointer to end of number
744 */
745 int
746 isdn_getnum(char **p)
747 {
748 int v = -1;
749
750 while (*p[0] >= '0' && *p[0] <= '9')
751 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0');
752 return v;
753 }
754
755 #define DLE 0x10
756
757 /*
758 * isdn_readbchan() tries to get data from the read-queue.
759 * It MUST be called with interrupts off.
760 *
761 * Be aware that this is not an atomic operation when sleep != 0, even though
762 * interrupts are turned off! Well, like that we are currently only called
763 * on behalf of a read system call on raw device files (which are documented
764 * to be dangerous and for for debugging purpose only). The inode semaphore
765 * takes care that this is not called for the same minor device number while
766 * we are sleeping, but access is not serialized against simultaneous read()
767 * from the corresponding ttyI device. Can other ugly events, like changes
768 * of the mapping (di,ch)<->minor, happen during the sleep? --he
769 */
770 int
771 isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, wait_queue_head_t *sleep)
772 {
773 int count;
774 int count_pull;
775 int count_put;
776 int dflag;
777 struct sk_buff *skb;
778 u_char *cp;
779
780 if (!dev->drv[di])
781 return 0;
782 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) {
783 if (sleep)
784 interruptible_sleep_on(sleep);
785 else
786 return 0;
787 }
788 if (len > dev->drv[di]->rcvcount[channel])
789 len = dev->drv[di]->rcvcount[channel];
790 cp = buf;
791 count = 0;
792 while (len) {
793 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
794 break;
795 #ifdef CONFIG_ISDN_AUDIO
796 if (ISDN_AUDIO_SKB_LOCK(skb))
797 break;
798 ISDN_AUDIO_SKB_LOCK(skb) = 1;
799 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
800 char *p = skb->data;
801 unsigned long DLEmask = (1 << channel);
802
803 dflag = 0;
804 count_pull = count_put = 0;
805 while ((count_pull < skb->len) && (len > 0)) {
806 len--;
807 if (dev->drv[di]->DLEflag & DLEmask) {
808 *cp++ = DLE;
809 dev->drv[di]->DLEflag &= ~DLEmask;
810 } else {
811 *cp++ = *p;
812 if (*p == DLE) {
813 dev->drv[di]->DLEflag |= DLEmask;
814 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
815 }
816 p++;
817 count_pull++;
818 }
819 count_put++;
820 }
821 if (count_pull >= skb->len)
822 dflag = 1;
823 } else {
824 #endif
825 /* No DLE's in buff, so simply copy it */
826 dflag = 1;
827 if ((count_pull = skb->len) > len) {
828 count_pull = len;
829 dflag = 0;
830 }
831 count_put = count_pull;
832 skb_copy_from_linear_data(skb, cp, count_put);
833 cp += count_put;
834 len -= count_put;
835 #ifdef CONFIG_ISDN_AUDIO
836 }
837 #endif
838 count += count_put;
839 if (fp) {
840 memset(fp, 0, count_put);
841 fp += count_put;
842 }
843 if (dflag) {
844 /* We got all the data in this buff.
845 * Now we can dequeue it.
846 */
847 if (fp)
848 *(fp - 1) = 0xff;
849 #ifdef CONFIG_ISDN_AUDIO
850 ISDN_AUDIO_SKB_LOCK(skb) = 0;
851 #endif
852 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
853 dev_kfree_skb(skb);
854 } else {
855 /* Not yet emptied this buff, so it
856 * must stay in the queue, for further calls
857 * but we pull off the data we got until now.
858 */
859 skb_pull(skb, count_pull);
860 #ifdef CONFIG_ISDN_AUDIO
861 ISDN_AUDIO_SKB_LOCK(skb) = 0;
862 #endif
863 }
864 dev->drv[di]->rcvcount[channel] -= count_put;
865 }
866 return count;
867 }
868
869 /*
870 * isdn_readbchan_tty() tries to get data from the read-queue.
871 * It MUST be called with interrupts off.
872 *
873 * Be aware that this is not an atomic operation when sleep != 0, even though
874 * interrupts are turned off! Well, like that we are currently only called
875 * on behalf of a read system call on raw device files (which are documented
876 * to be dangerous and for for debugging purpose only). The inode semaphore
877 * takes care that this is not called for the same minor device number while
878 * we are sleeping, but access is not serialized against simultaneous read()
879 * from the corresponding ttyI device. Can other ugly events, like changes
880 * of the mapping (di,ch)<->minor, happen during the sleep? --he
881 */
882 int
883 isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
884 {
885 int count;
886 int count_pull;
887 int count_put;
888 int dflag;
889 struct sk_buff *skb;
890 char last = 0;
891 int len;
892
893 if (!dev->drv[di])
894 return 0;
895 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
896 return 0;
897
898 len = tty_buffer_request_room(tty, dev->drv[di]->rcvcount[channel]);
899 if(len == 0)
900 return len;
901
902 count = 0;
903 while (len) {
904 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
905 break;
906 #ifdef CONFIG_ISDN_AUDIO
907 if (ISDN_AUDIO_SKB_LOCK(skb))
908 break;
909 ISDN_AUDIO_SKB_LOCK(skb) = 1;
910 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
911 char *p = skb->data;
912 unsigned long DLEmask = (1 << channel);
913
914 dflag = 0;
915 count_pull = count_put = 0;
916 while ((count_pull < skb->len) && (len > 0)) {
917 len--;
918 if (dev->drv[di]->DLEflag & DLEmask) {
919 last = DLE;
920 dev->drv[di]->DLEflag &= ~DLEmask;
921 } else {
922 last = *p;
923 if (last == DLE) {
924 dev->drv[di]->DLEflag |= DLEmask;
925 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
926 }
927 p++;
928 count_pull++;
929 }
930 count_put++;
931 }
932 if (count_pull >= skb->len)
933 dflag = 1;
934 } else {
935 #endif
936 /* No DLE's in buff, so simply copy it */
937 dflag = 1;
938 if ((count_pull = skb->len) > len) {
939 count_pull = len;
940 dflag = 0;
941 }
942 count_put = count_pull;
943 if(count_put > 1)
944 tty_insert_flip_string(tty, skb->data, count_put - 1);
945 last = skb->data[count_put - 1];
946 len -= count_put;
947 #ifdef CONFIG_ISDN_AUDIO
948 }
949 #endif
950 count += count_put;
951 if (dflag) {
952 /* We got all the data in this buff.
953 * Now we can dequeue it.
954 */
955 if(cisco_hack)
956 tty_insert_flip_char(tty, last, 0xFF);
957 else
958 tty_insert_flip_char(tty, last, TTY_NORMAL);
959 #ifdef CONFIG_ISDN_AUDIO
960 ISDN_AUDIO_SKB_LOCK(skb) = 0;
961 #endif
962 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
963 dev_kfree_skb(skb);
964 } else {
965 tty_insert_flip_char(tty, last, TTY_NORMAL);
966 /* Not yet emptied this buff, so it
967 * must stay in the queue, for further calls
968 * but we pull off the data we got until now.
969 */
970 skb_pull(skb, count_pull);
971 #ifdef CONFIG_ISDN_AUDIO
972 ISDN_AUDIO_SKB_LOCK(skb) = 0;
973 #endif
974 }
975 dev->drv[di]->rcvcount[channel] -= count_put;
976 }
977 return count;
978 }
979
980
981 static __inline int
982 isdn_minor2drv(int minor)
983 {
984 return (dev->drvmap[minor]);
985 }
986
987 static __inline int
988 isdn_minor2chan(int minor)
989 {
990 return (dev->chanmap[minor]);
991 }
992
993 static char *
994 isdn_statstr(void)
995 {
996 static char istatbuf[2048];
997 char *p;
998 int i;
999
1000 sprintf(istatbuf, "idmap:\t");
1001 p = istatbuf + strlen(istatbuf);
1002 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1003 sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]);
1004 p = istatbuf + strlen(istatbuf);
1005 }
1006 sprintf(p, "\nchmap:\t");
1007 p = istatbuf + strlen(istatbuf);
1008 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1009 sprintf(p, "%d ", dev->chanmap[i]);
1010 p = istatbuf + strlen(istatbuf);
1011 }
1012 sprintf(p, "\ndrmap:\t");
1013 p = istatbuf + strlen(istatbuf);
1014 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1015 sprintf(p, "%d ", dev->drvmap[i]);
1016 p = istatbuf + strlen(istatbuf);
1017 }
1018 sprintf(p, "\nusage:\t");
1019 p = istatbuf + strlen(istatbuf);
1020 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1021 sprintf(p, "%d ", dev->usage[i]);
1022 p = istatbuf + strlen(istatbuf);
1023 }
1024 sprintf(p, "\nflags:\t");
1025 p = istatbuf + strlen(istatbuf);
1026 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
1027 if (dev->drv[i]) {
1028 sprintf(p, "%ld ", dev->drv[i]->online);
1029 p = istatbuf + strlen(istatbuf);
1030 } else {
1031 sprintf(p, "? ");
1032 p = istatbuf + strlen(istatbuf);
1033 }
1034 }
1035 sprintf(p, "\nphone:\t");
1036 p = istatbuf + strlen(istatbuf);
1037 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1038 sprintf(p, "%s ", dev->num[i]);
1039 p = istatbuf + strlen(istatbuf);
1040 }
1041 sprintf(p, "\n");
1042 return istatbuf;
1043 }
1044
1045 /* Module interface-code */
1046
1047 void
1048 isdn_info_update(void)
1049 {
1050 infostruct *p = dev->infochain;
1051
1052 while (p) {
1053 *(p->private) = 1;
1054 p = (infostruct *) p->next;
1055 }
1056 wake_up_interruptible(&(dev->info_waitq));
1057 }
1058
1059 static ssize_t
1060 isdn_read(struct file *file, char __user *buf, size_t count, loff_t * off)
1061 {
1062 uint minor = iminor(file->f_path.dentry->d_inode);
1063 int len = 0;
1064 int drvidx;
1065 int chidx;
1066 int retval;
1067 char *p;
1068
1069 lock_kernel();
1070 if (minor == ISDN_MINOR_STATUS) {
1071 if (!file->private_data) {
1072 if (file->f_flags & O_NONBLOCK) {
1073 retval = -EAGAIN;
1074 goto out;
1075 }
1076 interruptible_sleep_on(&(dev->info_waitq));
1077 }
1078 p = isdn_statstr();
1079 file->private_data = NULL;
1080 if ((len = strlen(p)) <= count) {
1081 if (copy_to_user(buf, p, len)) {
1082 retval = -EFAULT;
1083 goto out;
1084 }
1085 *off += len;
1086 retval = len;
1087 goto out;
1088 }
1089 retval = 0;
1090 goto out;
1091 }
1092 if (!dev->drivers) {
1093 retval = -ENODEV;
1094 goto out;
1095 }
1096 if (minor <= ISDN_MINOR_BMAX) {
1097 printk(KERN_WARNING "isdn_read minor %d obsolete!\n", minor);
1098 drvidx = isdn_minor2drv(minor);
1099 if (drvidx < 0) {
1100 retval = -ENODEV;
1101 goto out;
1102 }
1103 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1104 retval = -ENODEV;
1105 goto out;
1106 }
1107 chidx = isdn_minor2chan(minor);
1108 if (!(p = kmalloc(count, GFP_KERNEL))) {
1109 retval = -ENOMEM;
1110 goto out;
1111 }
1112 len = isdn_readbchan(drvidx, chidx, p, NULL, count,
1113 &dev->drv[drvidx]->rcv_waitq[chidx]);
1114 *off += len;
1115 if (copy_to_user(buf,p,len))
1116 len = -EFAULT;
1117 kfree(p);
1118 retval = len;
1119 goto out;
1120 }
1121 if (minor <= ISDN_MINOR_CTRLMAX) {
1122 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1123 if (drvidx < 0) {
1124 retval = -ENODEV;
1125 goto out;
1126 }
1127 if (!dev->drv[drvidx]->stavail) {
1128 if (file->f_flags & O_NONBLOCK) {
1129 retval = -EAGAIN;
1130 goto out;
1131 }
1132 interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq));
1133 }
1134 if (dev->drv[drvidx]->interface->readstat) {
1135 if (count > dev->drv[drvidx]->stavail)
1136 count = dev->drv[drvidx]->stavail;
1137 len = dev->drv[drvidx]->interface->readstat(buf, count,
1138 drvidx, isdn_minor2chan(minor - ISDN_MINOR_CTRL));
1139 if (len < 0) {
1140 retval = len;
1141 goto out;
1142 }
1143 } else {
1144 len = 0;
1145 }
1146 if (len)
1147 dev->drv[drvidx]->stavail -= len;
1148 else
1149 dev->drv[drvidx]->stavail = 0;
1150 *off += len;
1151 retval = len;
1152 goto out;
1153 }
1154 #ifdef CONFIG_ISDN_PPP
1155 if (minor <= ISDN_MINOR_PPPMAX) {
1156 retval = isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count);
1157 goto out;
1158 }
1159 #endif
1160 retval = -ENODEV;
1161 out:
1162 unlock_kernel();
1163 return retval;
1164 }
1165
1166 static ssize_t
1167 isdn_write(struct file *file, const char __user *buf, size_t count, loff_t * off)
1168 {
1169 uint minor = iminor(file->f_path.dentry->d_inode);
1170 int drvidx;
1171 int chidx;
1172 int retval;
1173
1174 if (minor == ISDN_MINOR_STATUS)
1175 return -EPERM;
1176 if (!dev->drivers)
1177 return -ENODEV;
1178
1179 lock_kernel();
1180 if (minor <= ISDN_MINOR_BMAX) {
1181 printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor);
1182 drvidx = isdn_minor2drv(minor);
1183 if (drvidx < 0) {
1184 retval = -ENODEV;
1185 goto out;
1186 }
1187 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1188 retval = -ENODEV;
1189 goto out;
1190 }
1191 chidx = isdn_minor2chan(minor);
1192 while ((retval = isdn_writebuf_stub(drvidx, chidx, buf, count)) == 0)
1193 interruptible_sleep_on(&dev->drv[drvidx]->snd_waitq[chidx]);
1194 goto out;
1195 }
1196 if (minor <= ISDN_MINOR_CTRLMAX) {
1197 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1198 if (drvidx < 0) {
1199 retval = -ENODEV;
1200 goto out;
1201 }
1202 /*
1203 * We want to use the isdnctrl device to load the firmware
1204 *
1205 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1206 return -ENODEV;
1207 */
1208 if (dev->drv[drvidx]->interface->writecmd)
1209 retval = dev->drv[drvidx]->interface->
1210 writecmd(buf, count, drvidx,
1211 isdn_minor2chan(minor - ISDN_MINOR_CTRL));
1212 else
1213 retval = count;
1214 goto out;
1215 }
1216 #ifdef CONFIG_ISDN_PPP
1217 if (minor <= ISDN_MINOR_PPPMAX) {
1218 retval = isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count);
1219 goto out;
1220 }
1221 #endif
1222 retval = -ENODEV;
1223 out:
1224 unlock_kernel();
1225 return retval;
1226 }
1227
1228 static unsigned int
1229 isdn_poll(struct file *file, poll_table * wait)
1230 {
1231 unsigned int mask = 0;
1232 unsigned int minor = iminor(file->f_path.dentry->d_inode);
1233 int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1234
1235 lock_kernel();
1236 if (minor == ISDN_MINOR_STATUS) {
1237 poll_wait(file, &(dev->info_waitq), wait);
1238 /* mask = POLLOUT | POLLWRNORM; */
1239 if (file->private_data) {
1240 mask |= POLLIN | POLLRDNORM;
1241 }
1242 goto out;
1243 }
1244 if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
1245 if (drvidx < 0) {
1246 /* driver deregistered while file open */
1247 mask = POLLHUP;
1248 goto out;
1249 }
1250 poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
1251 mask = POLLOUT | POLLWRNORM;
1252 if (dev->drv[drvidx]->stavail) {
1253 mask |= POLLIN | POLLRDNORM;
1254 }
1255 goto out;
1256 }
1257 #ifdef CONFIG_ISDN_PPP
1258 if (minor <= ISDN_MINOR_PPPMAX) {
1259 mask = isdn_ppp_poll(file, wait);
1260 goto out;
1261 }
1262 #endif
1263 mask = POLLERR;
1264 out:
1265 unlock_kernel();
1266 return mask;
1267 }
1268
1269
1270 static int
1271 isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
1272 {
1273 uint minor = iminor(inode);
1274 isdn_ctrl c;
1275 int drvidx;
1276 int chidx;
1277 int ret;
1278 int i;
1279 char __user *p;
1280 char *s;
1281 union iocpar {
1282 char name[10];
1283 char bname[22];
1284 isdn_ioctl_struct iocts;
1285 isdn_net_ioctl_phone phone;
1286 isdn_net_ioctl_cfg cfg;
1287 } iocpar;
1288 void __user *argp = (void __user *)arg;
1289
1290 #define name iocpar.name
1291 #define bname iocpar.bname
1292 #define iocts iocpar.iocts
1293 #define phone iocpar.phone
1294 #define cfg iocpar.cfg
1295
1296 if (minor == ISDN_MINOR_STATUS) {
1297 switch (cmd) {
1298 case IIOCGETDVR:
1299 return (TTY_DV +
1300 (NET_DV << 8) +
1301 (INF_DV << 16));
1302 case IIOCGETCPS:
1303 if (arg) {
1304 ulong __user *p = argp;
1305 int i;
1306 if (!access_ok(VERIFY_WRITE, p,
1307 sizeof(ulong) * ISDN_MAX_CHANNELS * 2))
1308 return -EFAULT;
1309 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1310 put_user(dev->ibytes[i], p++);
1311 put_user(dev->obytes[i], p++);
1312 }
1313 return 0;
1314 } else
1315 return -EINVAL;
1316 break;
1317 #ifdef CONFIG_NETDEVICES
1318 case IIOCNETGPN:
1319 /* Get peer phone number of a connected
1320 * isdn network interface */
1321 if (arg) {
1322 if (copy_from_user(&phone, argp, sizeof(phone)))
1323 return -EFAULT;
1324 return isdn_net_getpeer(&phone, argp);
1325 } else
1326 return -EINVAL;
1327 #endif
1328 default:
1329 return -EINVAL;
1330 }
1331 }
1332 if (!dev->drivers)
1333 return -ENODEV;
1334 if (minor <= ISDN_MINOR_BMAX) {
1335 drvidx = isdn_minor2drv(minor);
1336 if (drvidx < 0)
1337 return -ENODEV;
1338 chidx = isdn_minor2chan(minor);
1339 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1340 return -ENODEV;
1341 return 0;
1342 }
1343 if (minor <= ISDN_MINOR_CTRLMAX) {
1344 /*
1345 * isdn net devices manage lots of configuration variables as linked lists.
1346 * Those lists must only be manipulated from user space. Some of the ioctl's
1347 * service routines access user space and are not atomic. Therefor, ioctl's
1348 * manipulating the lists and ioctl's sleeping while accessing the lists
1349 * are serialized by means of a semaphore.
1350 */
1351 switch (cmd) {
1352 case IIOCNETDWRSET:
1353 printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
1354 return(-EINVAL);
1355 case IIOCNETLCR:
1356 printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
1357 return -ENODEV;
1358 #ifdef CONFIG_NETDEVICES
1359 case IIOCNETAIF:
1360 /* Add a network-interface */
1361 if (arg) {
1362 if (copy_from_user(name, argp, sizeof(name)))
1363 return -EFAULT;
1364 s = name;
1365 } else {
1366 s = NULL;
1367 }
1368 ret = mutex_lock_interruptible(&dev->mtx);
1369 if( ret ) return ret;
1370 if ((s = isdn_net_new(s, NULL))) {
1371 if (copy_to_user(argp, s, strlen(s) + 1)){
1372 ret = -EFAULT;
1373 } else {
1374 ret = 0;
1375 }
1376 } else
1377 ret = -ENODEV;
1378 mutex_unlock(&dev->mtx);
1379 return ret;
1380 case IIOCNETASL:
1381 /* Add a slave to a network-interface */
1382 if (arg) {
1383 if (copy_from_user(bname, argp, sizeof(bname) - 1))
1384 return -EFAULT;
1385 } else
1386 return -EINVAL;
1387 ret = mutex_lock_interruptible(&dev->mtx);
1388 if( ret ) return ret;
1389 if ((s = isdn_net_newslave(bname))) {
1390 if (copy_to_user(argp, s, strlen(s) + 1)){
1391 ret = -EFAULT;
1392 } else {
1393 ret = 0;
1394 }
1395 } else
1396 ret = -ENODEV;
1397 mutex_unlock(&dev->mtx);
1398 return ret;
1399 case IIOCNETDIF:
1400 /* Delete a network-interface */
1401 if (arg) {
1402 if (copy_from_user(name, argp, sizeof(name)))
1403 return -EFAULT;
1404 ret = mutex_lock_interruptible(&dev->mtx);
1405 if( ret ) return ret;
1406 ret = isdn_net_rm(name);
1407 mutex_unlock(&dev->mtx);
1408 return ret;
1409 } else
1410 return -EINVAL;
1411 case IIOCNETSCF:
1412 /* Set configurable parameters of a network-interface */
1413 if (arg) {
1414 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1415 return -EFAULT;
1416 return isdn_net_setcfg(&cfg);
1417 } else
1418 return -EINVAL;
1419 case IIOCNETGCF:
1420 /* Get configurable parameters of a network-interface */
1421 if (arg) {
1422 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1423 return -EFAULT;
1424 if (!(ret = isdn_net_getcfg(&cfg))) {
1425 if (copy_to_user(argp, &cfg, sizeof(cfg)))
1426 return -EFAULT;
1427 }
1428 return ret;
1429 } else
1430 return -EINVAL;
1431 case IIOCNETANM:
1432 /* Add a phone-number to a network-interface */
1433 if (arg) {
1434 if (copy_from_user(&phone, argp, sizeof(phone)))
1435 return -EFAULT;
1436 ret = mutex_lock_interruptible(&dev->mtx);
1437 if( ret ) return ret;
1438 ret = isdn_net_addphone(&phone);
1439 mutex_unlock(&dev->mtx);
1440 return ret;
1441 } else
1442 return -EINVAL;
1443 case IIOCNETGNM:
1444 /* Get list of phone-numbers of a network-interface */
1445 if (arg) {
1446 if (copy_from_user(&phone, argp, sizeof(phone)))
1447 return -EFAULT;
1448 ret = mutex_lock_interruptible(&dev->mtx);
1449 if( ret ) return ret;
1450 ret = isdn_net_getphones(&phone, argp);
1451 mutex_unlock(&dev->mtx);
1452 return ret;
1453 } else
1454 return -EINVAL;
1455 case IIOCNETDNM:
1456 /* Delete a phone-number of a network-interface */
1457 if (arg) {
1458 if (copy_from_user(&phone, argp, sizeof(phone)))
1459 return -EFAULT;
1460 ret = mutex_lock_interruptible(&dev->mtx);
1461 if( ret ) return ret;
1462 ret = isdn_net_delphone(&phone);
1463 mutex_unlock(&dev->mtx);
1464 return ret;
1465 } else
1466 return -EINVAL;
1467 case IIOCNETDIL:
1468 /* Force dialing of a network-interface */
1469 if (arg) {
1470 if (copy_from_user(name, argp, sizeof(name)))
1471 return -EFAULT;
1472 return isdn_net_force_dial(name);
1473 } else
1474 return -EINVAL;
1475 #ifdef CONFIG_ISDN_PPP
1476 case IIOCNETALN:
1477 if (!arg)
1478 return -EINVAL;
1479 if (copy_from_user(name, argp, sizeof(name)))
1480 return -EFAULT;
1481 return isdn_ppp_dial_slave(name);
1482 case IIOCNETDLN:
1483 if (!arg)
1484 return -EINVAL;
1485 if (copy_from_user(name, argp, sizeof(name)))
1486 return -EFAULT;
1487 return isdn_ppp_hangup_slave(name);
1488 #endif
1489 case IIOCNETHUP:
1490 /* Force hangup of a network-interface */
1491 if (!arg)
1492 return -EINVAL;
1493 if (copy_from_user(name, argp, sizeof(name)))
1494 return -EFAULT;
1495 return isdn_net_force_hangup(name);
1496 break;
1497 #endif /* CONFIG_NETDEVICES */
1498 case IIOCSETVER:
1499 dev->net_verbose = arg;
1500 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1501 return 0;
1502 case IIOCSETGST:
1503 if (arg)
1504 dev->global_flags |= ISDN_GLOBAL_STOPPED;
1505 else
1506 dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1507 printk(KERN_INFO "isdn: Global Mode %s\n",
1508 (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1509 return 0;
1510 case IIOCSETBRJ:
1511 drvidx = -1;
1512 if (arg) {
1513 int i;
1514 char *p;
1515 if (copy_from_user(&iocts, argp,
1516 sizeof(isdn_ioctl_struct)))
1517 return -EFAULT;
1518 if (strlen(iocts.drvid)) {
1519 if ((p = strchr(iocts.drvid, ',')))
1520 *p = 0;
1521 drvidx = -1;
1522 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1523 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1524 drvidx = i;
1525 break;
1526 }
1527 }
1528 }
1529 if (drvidx == -1)
1530 return -ENODEV;
1531 if (iocts.arg)
1532 dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
1533 else
1534 dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
1535 return 0;
1536 case IIOCSIGPRF:
1537 dev->profd = current;
1538 return 0;
1539 break;
1540 case IIOCGETPRF:
1541 /* Get all Modem-Profiles */
1542 if (arg) {
1543 char __user *p = argp;
1544 int i;
1545
1546 if (!access_ok(VERIFY_WRITE, argp,
1547 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1548 * ISDN_MAX_CHANNELS))
1549 return -EFAULT;
1550
1551 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1552 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1553 ISDN_MODEM_NUMREG))
1554 return -EFAULT;
1555 p += ISDN_MODEM_NUMREG;
1556 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1557 return -EFAULT;
1558 p += ISDN_MSNLEN;
1559 if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
1560 return -EFAULT;
1561 p += ISDN_LMSNLEN;
1562 }
1563 return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
1564 } else
1565 return -EINVAL;
1566 break;
1567 case IIOCSETPRF:
1568 /* Set all Modem-Profiles */
1569 if (arg) {
1570 char __user *p = argp;
1571 int i;
1572
1573 if (!access_ok(VERIFY_READ, argp,
1574 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1575 * ISDN_MAX_CHANNELS))
1576 return -EFAULT;
1577
1578 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1579 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1580 ISDN_MODEM_NUMREG))
1581 return -EFAULT;
1582 p += ISDN_MODEM_NUMREG;
1583 if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
1584 return -EFAULT;
1585 p += ISDN_LMSNLEN;
1586 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1587 return -EFAULT;
1588 p += ISDN_MSNLEN;
1589 }
1590 return 0;
1591 } else
1592 return -EINVAL;
1593 break;
1594 case IIOCSETMAP:
1595 case IIOCGETMAP:
1596 /* Set/Get MSN->EAZ-Mapping for a driver */
1597 if (arg) {
1598
1599 if (copy_from_user(&iocts, argp,
1600 sizeof(isdn_ioctl_struct)))
1601 return -EFAULT;
1602 if (strlen(iocts.drvid)) {
1603 drvidx = -1;
1604 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1605 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1606 drvidx = i;
1607 break;
1608 }
1609 } else
1610 drvidx = 0;
1611 if (drvidx == -1)
1612 return -ENODEV;
1613 if (cmd == IIOCSETMAP) {
1614 int loop = 1;
1615
1616 p = (char __user *) iocts.arg;
1617 i = 0;
1618 while (loop) {
1619 int j = 0;
1620
1621 while (1) {
1622 if (!access_ok(VERIFY_READ, p, 1))
1623 return -EFAULT;
1624 get_user(bname[j], p++);
1625 switch (bname[j]) {
1626 case '\0':
1627 loop = 0;
1628 /* Fall through */
1629 case ',':
1630 bname[j] = '\0';
1631 strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
1632 j = ISDN_MSNLEN;
1633 break;
1634 default:
1635 j++;
1636 }
1637 if (j >= ISDN_MSNLEN)
1638 break;
1639 }
1640 if (++i > 9)
1641 break;
1642 }
1643 } else {
1644 p = (char __user *) iocts.arg;
1645 for (i = 0; i < 10; i++) {
1646 sprintf(bname, "%s%s",
1647 strlen(dev->drv[drvidx]->msn2eaz[i]) ?
1648 dev->drv[drvidx]->msn2eaz[i] : "_",
1649 (i < 9) ? "," : "\0");
1650 if (copy_to_user(p, bname, strlen(bname) + 1))
1651 return -EFAULT;
1652 p += strlen(bname);
1653 }
1654 }
1655 return 0;
1656 } else
1657 return -EINVAL;
1658 case IIOCDBGVAR:
1659 if (arg) {
1660 if (copy_to_user(argp, &dev, sizeof(ulong)))
1661 return -EFAULT;
1662 return 0;
1663 } else
1664 return -EINVAL;
1665 break;
1666 default:
1667 if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
1668 cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
1669 else
1670 return -EINVAL;
1671 if (arg) {
1672 int i;
1673 char *p;
1674 if (copy_from_user(&iocts, argp, sizeof(isdn_ioctl_struct)))
1675 return -EFAULT;
1676 if (strlen(iocts.drvid)) {
1677 if ((p = strchr(iocts.drvid, ',')))
1678 *p = 0;
1679 drvidx = -1;
1680 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1681 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1682 drvidx = i;
1683 break;
1684 }
1685 } else
1686 drvidx = 0;
1687 if (drvidx == -1)
1688 return -ENODEV;
1689 if (!access_ok(VERIFY_WRITE, argp,
1690 sizeof(isdn_ioctl_struct)))
1691 return -EFAULT;
1692 c.driver = drvidx;
1693 c.command = ISDN_CMD_IOCTL;
1694 c.arg = cmd;
1695 memcpy(c.parm.num, &iocts.arg, sizeof(ulong));
1696 ret = isdn_command(&c);
1697 memcpy(&iocts.arg, c.parm.num, sizeof(ulong));
1698 if (copy_to_user(argp, &iocts, sizeof(isdn_ioctl_struct)))
1699 return -EFAULT;
1700 return ret;
1701 } else
1702 return -EINVAL;
1703 }
1704 }
1705 #ifdef CONFIG_ISDN_PPP
1706 if (minor <= ISDN_MINOR_PPPMAX)
1707 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1708 #endif
1709 return -ENODEV;
1710
1711 #undef name
1712 #undef bname
1713 #undef iocts
1714 #undef phone
1715 #undef cfg
1716 }
1717
1718 /*
1719 * Open the device code.
1720 */
1721 static int
1722 isdn_open(struct inode *ino, struct file *filep)
1723 {
1724 uint minor = iminor(ino);
1725 int drvidx;
1726 int chidx;
1727 int retval = -ENODEV;
1728
1729
1730 if (minor == ISDN_MINOR_STATUS) {
1731 infostruct *p;
1732
1733 if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1734 p->next = (char *) dev->infochain;
1735 p->private = (char *) &(filep->private_data);
1736 dev->infochain = p;
1737 /* At opening we allow a single update */
1738 filep->private_data = (char *) 1;
1739 retval = 0;
1740 goto out;
1741 } else {
1742 retval = -ENOMEM;
1743 goto out;
1744 }
1745 }
1746 if (!dev->channels)
1747 goto out;
1748 if (minor <= ISDN_MINOR_BMAX) {
1749 printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
1750 drvidx = isdn_minor2drv(minor);
1751 if (drvidx < 0)
1752 goto out;
1753 chidx = isdn_minor2chan(minor);
1754 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1755 goto out;
1756 if (!(dev->drv[drvidx]->online & (1 << chidx)))
1757 goto out;
1758 isdn_lock_drivers();
1759 retval = 0;
1760 goto out;
1761 }
1762 if (minor <= ISDN_MINOR_CTRLMAX) {
1763 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1764 if (drvidx < 0)
1765 goto out;
1766 isdn_lock_drivers();
1767 retval = 0;
1768 goto out;
1769 }
1770 #ifdef CONFIG_ISDN_PPP
1771 if (minor <= ISDN_MINOR_PPPMAX) {
1772 retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
1773 if (retval == 0)
1774 isdn_lock_drivers();
1775 goto out;
1776 }
1777 #endif
1778 out:
1779 nonseekable_open(ino, filep);
1780 return retval;
1781 }
1782
1783 static int
1784 isdn_close(struct inode *ino, struct file *filep)
1785 {
1786 uint minor = iminor(ino);
1787
1788 lock_kernel();
1789 if (minor == ISDN_MINOR_STATUS) {
1790 infostruct *p = dev->infochain;
1791 infostruct *q = NULL;
1792
1793 while (p) {
1794 if (p->private == (char *) &(filep->private_data)) {
1795 if (q)
1796 q->next = p->next;
1797 else
1798 dev->infochain = (infostruct *) (p->next);
1799 kfree(p);
1800 goto out;
1801 }
1802 q = p;
1803 p = (infostruct *) (p->next);
1804 }
1805 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1806 goto out;
1807 }
1808 isdn_unlock_drivers();
1809 if (minor <= ISDN_MINOR_BMAX)
1810 goto out;
1811 if (minor <= ISDN_MINOR_CTRLMAX) {
1812 if (dev->profd == current)
1813 dev->profd = NULL;
1814 goto out;
1815 }
1816 #ifdef CONFIG_ISDN_PPP
1817 if (minor <= ISDN_MINOR_PPPMAX)
1818 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1819 #endif
1820
1821 out:
1822 unlock_kernel();
1823 return 0;
1824 }
1825
1826 static const struct file_operations isdn_fops =
1827 {
1828 .owner = THIS_MODULE,
1829 .llseek = no_llseek,
1830 .read = isdn_read,
1831 .write = isdn_write,
1832 .poll = isdn_poll,
1833 .ioctl = isdn_ioctl,
1834 .open = isdn_open,
1835 .release = isdn_close,
1836 };
1837
1838 char *
1839 isdn_map_eaz2msn(char *msn, int di)
1840 {
1841 isdn_driver_t *this = dev->drv[di];
1842 int i;
1843
1844 if (strlen(msn) == 1) {
1845 i = msn[0] - '0';
1846 if ((i >= 0) && (i <= 9))
1847 if (strlen(this->msn2eaz[i]))
1848 return (this->msn2eaz[i]);
1849 }
1850 return (msn);
1851 }
1852
1853 /*
1854 * Find an unused ISDN-channel, whose feature-flags match the
1855 * given L2- and L3-protocols.
1856 */
1857 #define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038))
1858
1859 /*
1860 * This function must be called with holding the dev->lock.
1861 */
1862 int
1863 isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1864 ,int pre_chan, char *msn)
1865 {
1866 int i;
1867 ulong features;
1868 ulong vfeatures;
1869
1870 features = ((1 << l2_proto) | (0x10000 << l3_proto));
1871 vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1872 ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038));
1873 /* If Layer-2 protocol is V.110, accept drivers with
1874 * transparent feature even if these don't support V.110
1875 * because we can emulate this in linklevel.
1876 */
1877 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1878 if (USG_NONE(dev->usage[i]) &&
1879 (dev->drvmap[i] != -1)) {
1880 int d = dev->drvmap[i];
1881 if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1882 ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1883 continue;
1884 if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
1885 continue;
1886 if (dev->usage[i] & ISDN_USAGE_DISABLED)
1887 continue; /* usage not allowed */
1888 if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
1889 if (((dev->drv[d]->interface->features & features) == features) ||
1890 (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1891 (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1892 if ((pre_dev < 0) || (pre_chan < 0)) {
1893 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1894 dev->usage[i] |= usage;
1895 isdn_info_update();
1896 return i;
1897 } else {
1898 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1899 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1900 dev->usage[i] |= usage;
1901 isdn_info_update();
1902 return i;
1903 }
1904 }
1905 }
1906 }
1907 }
1908 return -1;
1909 }
1910
1911 /*
1912 * Set state of ISDN-channel to 'unused'
1913 */
1914 void
1915 isdn_free_channel(int di, int ch, int usage)
1916 {
1917 int i;
1918
1919 if ((di < 0) || (ch < 0)) {
1920 printk(KERN_WARNING "%s: called with invalid drv(%d) or channel(%d)\n",
1921 __FUNCTION__, di, ch);
1922 return;
1923 }
1924 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1925 if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
1926 (dev->drvmap[i] == di) &&
1927 (dev->chanmap[i] == ch)) {
1928 dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1929 strcpy(dev->num[i], "???");
1930 dev->ibytes[i] = 0;
1931 dev->obytes[i] = 0;
1932 // 20.10.99 JIM, try to reinitialize v110 !
1933 dev->v110emu[i] = 0;
1934 atomic_set(&(dev->v110use[i]), 0);
1935 isdn_v110_close(dev->v110[i]);
1936 dev->v110[i] = NULL;
1937 // 20.10.99 JIM, try to reinitialize v110 !
1938 isdn_info_update();
1939 if (dev->drv[di])
1940 skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
1941 }
1942 }
1943
1944 /*
1945 * Cancel Exclusive-Flag for ISDN-channel
1946 */
1947 void
1948 isdn_unexclusive_channel(int di, int ch)
1949 {
1950 int i;
1951
1952 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1953 if ((dev->drvmap[i] == di) &&
1954 (dev->chanmap[i] == ch)) {
1955 dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1956 isdn_info_update();
1957 return;
1958 }
1959 }
1960
1961 /*
1962 * writebuf replacement for SKB_ABLE drivers
1963 */
1964 static int
1965 isdn_writebuf_stub(int drvidx, int chan, const u_char __user * buf, int len)
1966 {
1967 int ret;
1968 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1969 struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1970
1971 if (!skb)
1972 return -ENOMEM;
1973 skb_reserve(skb, hl);
1974 if (copy_from_user(skb_put(skb, len), buf, len))
1975 return -EFAULT;
1976 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
1977 if (ret <= 0)
1978 dev_kfree_skb(skb);
1979 if (ret > 0)
1980 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
1981 return ret;
1982 }
1983
1984 /*
1985 * Return: length of data on success, -ERRcode on failure.
1986 */
1987 int
1988 isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
1989 {
1990 int ret;
1991 struct sk_buff *nskb = NULL;
1992 int v110_ret = skb->len;
1993 int idx = isdn_dc2minor(drvidx, chan);
1994
1995 if (dev->v110[idx]) {
1996 atomic_inc(&dev->v110use[idx]);
1997 nskb = isdn_v110_encode(dev->v110[idx], skb);
1998 atomic_dec(&dev->v110use[idx]);
1999 if (!nskb)
2000 return 0;
2001 v110_ret = *((int *)nskb->data);
2002 skb_pull(nskb, sizeof(int));
2003 if (!nskb->len) {
2004 dev_kfree_skb(nskb);
2005 return v110_ret;
2006 }
2007 /* V.110 must always be acknowledged */
2008 ack = 1;
2009 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
2010 } else {
2011 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
2012
2013 if( skb_headroom(skb) < hl ){
2014 /*
2015 * This should only occur when new HL driver with
2016 * increased hl_hdrlen was loaded after netdevice
2017 * was created and connected to the new driver.
2018 *
2019 * The V.110 branch (re-allocates on its own) does
2020 * not need this
2021 */
2022 struct sk_buff * skb_tmp;
2023
2024 skb_tmp = skb_realloc_headroom(skb, hl);
2025 printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
2026 if (!skb_tmp) return -ENOMEM; /* 0 better? */
2027 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
2028 if( ret > 0 ){
2029 dev_kfree_skb(skb);
2030 } else {
2031 dev_kfree_skb(skb_tmp);
2032 }
2033 } else {
2034 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
2035 }
2036 }
2037 if (ret > 0) {
2038 dev->obytes[idx] += ret;
2039 if (dev->v110[idx]) {
2040 atomic_inc(&dev->v110use[idx]);
2041 dev->v110[idx]->skbuser++;
2042 atomic_dec(&dev->v110use[idx]);
2043 /* For V.110 return unencoded data length */
2044 ret = v110_ret;
2045 /* if the complete frame was send we free the skb;
2046 if not upper function will requeue the skb */
2047 if (ret == skb->len)
2048 dev_kfree_skb(skb);
2049 }
2050 } else
2051 if (dev->v110[idx])
2052 dev_kfree_skb(nskb);
2053 return ret;
2054 }
2055
2056 static int
2057 isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
2058 {
2059 int j, k, m;
2060
2061 init_waitqueue_head(&d->st_waitq);
2062 if (d->flags & DRV_FLAG_RUNNING)
2063 return -1;
2064 if (n < 1) return 0;
2065
2066 m = (adding) ? d->channels + n : n;
2067
2068 if (dev->channels + n > ISDN_MAX_CHANNELS) {
2069 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
2070 ISDN_MAX_CHANNELS);
2071 return -1;
2072 }
2073
2074 if ((adding) && (d->rcverr))
2075 kfree(d->rcverr);
2076 if (!(d->rcverr = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2077 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
2078 return -1;
2079 }
2080
2081 if ((adding) && (d->rcvcount))
2082 kfree(d->rcvcount);
2083 if (!(d->rcvcount = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2084 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
2085 if (!adding)
2086 kfree(d->rcverr);
2087 return -1;
2088 }
2089
2090 if ((adding) && (d->rpqueue)) {
2091 for (j = 0; j < d->channels; j++)
2092 skb_queue_purge(&d->rpqueue[j]);
2093 kfree(d->rpqueue);
2094 }
2095 if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_ATOMIC))) {
2096 printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
2097 if (!adding) {
2098 kfree(d->rcvcount);
2099 kfree(d->rcverr);
2100 }
2101 return -1;
2102 }
2103 for (j = 0; j < m; j++) {
2104 skb_queue_head_init(&d->rpqueue[j]);
2105 }
2106
2107 if ((adding) && (d->rcv_waitq))
2108 kfree(d->rcv_waitq);
2109 d->rcv_waitq = kmalloc(sizeof(wait_queue_head_t) * 2 * m, GFP_ATOMIC);
2110 if (!d->rcv_waitq) {
2111 printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
2112 if (!adding) {
2113 kfree(d->rpqueue);
2114 kfree(d->rcvcount);
2115 kfree(d->rcverr);
2116 }
2117 return -1;
2118 }
2119 d->snd_waitq = d->rcv_waitq + m;
2120 for (j = 0; j < m; j++) {
2121 init_waitqueue_head(&d->rcv_waitq[j]);
2122 init_waitqueue_head(&d->snd_waitq[j]);
2123 }
2124
2125 dev->channels += n;
2126 for (j = d->channels; j < m; j++)
2127 for (k = 0; k < ISDN_MAX_CHANNELS; k++)
2128 if (dev->chanmap[k] < 0) {
2129 dev->chanmap[k] = j;
2130 dev->drvmap[k] = drvidx;
2131 break;
2132 }
2133 d->channels = m;
2134 return 0;
2135 }
2136
2137 /*
2138 * Low-level-driver registration
2139 */
2140
2141 static void
2142 set_global_features(void)
2143 {
2144 int drvidx;
2145
2146 dev->global_features = 0;
2147 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
2148 if (!dev->drv[drvidx])
2149 continue;
2150 if (dev->drv[drvidx]->interface)
2151 dev->global_features |= dev->drv[drvidx]->interface->features;
2152 }
2153 }
2154
2155 #ifdef CONFIG_ISDN_DIVERSION
2156
2157 static char *map_drvname(int di)
2158 {
2159 if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
2160 return(NULL);
2161 return(dev->drvid[di]); /* driver name */
2162 } /* map_drvname */
2163
2164 static int map_namedrv(char *id)
2165 { int i;
2166
2167 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2168 { if (!strcmp(dev->drvid[i],id))
2169 return(i);
2170 }
2171 return(-1);
2172 } /* map_namedrv */
2173
2174 int DIVERT_REG_NAME(isdn_divert_if *i_div)
2175 {
2176 if (i_div->if_magic != DIVERT_IF_MAGIC)
2177 return(DIVERT_VER_ERR);
2178 switch (i_div->cmd)
2179 {
2180 case DIVERT_CMD_REL:
2181 if (divert_if != i_div)
2182 return(DIVERT_REL_ERR);
2183 divert_if = NULL; /* free interface */
2184 return(DIVERT_NO_ERR);
2185
2186 case DIVERT_CMD_REG:
2187 if (divert_if)
2188 return(DIVERT_REG_ERR);
2189 i_div->ll_cmd = isdn_command; /* set command function */
2190 i_div->drv_to_name = map_drvname;
2191 i_div->name_to_drv = map_namedrv;
2192 divert_if = i_div; /* remember interface */
2193 return(DIVERT_NO_ERR);
2194
2195 default:
2196 return(DIVERT_CMD_ERR);
2197 }
2198 } /* DIVERT_REG_NAME */
2199
2200 EXPORT_SYMBOL(DIVERT_REG_NAME);
2201
2202 #endif /* CONFIG_ISDN_DIVERSION */
2203
2204
2205 EXPORT_SYMBOL(register_isdn);
2206 #ifdef CONFIG_ISDN_PPP
2207 EXPORT_SYMBOL(isdn_ppp_register_compressor);
2208 EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
2209 #endif
2210
2211 int
2212 register_isdn(isdn_if * i)
2213 {
2214 isdn_driver_t *d;
2215 int j;
2216 ulong flags;
2217 int drvidx;
2218
2219 if (dev->drivers >= ISDN_MAX_DRIVERS) {
2220 printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
2221 ISDN_MAX_DRIVERS);
2222 return 0;
2223 }
2224 if (!i->writebuf_skb) {
2225 printk(KERN_WARNING "register_isdn: No write routine given.\n");
2226 return 0;
2227 }
2228 if (!(d = kzalloc(sizeof(isdn_driver_t), GFP_KERNEL))) {
2229 printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
2230 return 0;
2231 }
2232
2233 d->maxbufsize = i->maxbufsize;
2234 d->pktcount = 0;
2235 d->stavail = 0;
2236 d->flags = DRV_FLAG_LOADED;
2237 d->online = 0;
2238 d->interface = i;
2239 d->channels = 0;
2240 spin_lock_irqsave(&dev->lock, flags);
2241 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2242 if (!dev->drv[drvidx])
2243 break;
2244 if (isdn_add_channels(d, drvidx, i->channels, 0)) {
2245 spin_unlock_irqrestore(&dev->lock, flags);
2246 kfree(d);
2247 return 0;
2248 }
2249 i->channels = drvidx;
2250 i->rcvcallb_skb = isdn_receive_skb_callback;
2251 i->statcallb = isdn_status_callback;
2252 if (!strlen(i->id))
2253 sprintf(i->id, "line%d", drvidx);
2254 for (j = 0; j < drvidx; j++)
2255 if (!strcmp(i->id, dev->drvid[j]))
2256 sprintf(i->id, "line%d", drvidx);
2257 dev->drv[drvidx] = d;
2258 strcpy(dev->drvid[drvidx], i->id);
2259 isdn_info_update();
2260 dev->drivers++;
2261 set_global_features();
2262 spin_unlock_irqrestore(&dev->lock, flags);
2263 return 1;
2264 }
2265
2266 /*
2267 *****************************************************************************
2268 * And now the modules code.
2269 *****************************************************************************
2270 */
2271
2272 static char *
2273 isdn_getrev(const char *revision)
2274 {
2275 char *rev;
2276 char *p;
2277
2278 if ((p = strchr(revision, ':'))) {
2279 rev = p + 2;
2280 p = strchr(rev, '$');
2281 *--p = 0;
2282 } else
2283 rev = "???";
2284 return rev;
2285 }
2286
2287 /*
2288 * Allocate and initialize all data, register modem-devices
2289 */
2290 static int __init isdn_init(void)
2291 {
2292 int i;
2293 char tmprev[50];
2294
2295 if (!(dev = vmalloc(sizeof(isdn_dev)))) {
2296 printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
2297 return -EIO;
2298 }
2299 memset((char *) dev, 0, sizeof(isdn_dev));
2300 init_timer(&dev->timer);
2301 dev->timer.function = isdn_timer_funct;
2302 spin_lock_init(&dev->lock);
2303 spin_lock_init(&dev->timerlock);
2304 #ifdef MODULE
2305 dev->owner = THIS_MODULE;
2306 #endif
2307 mutex_init(&dev->mtx);
2308 init_waitqueue_head(&dev->info_waitq);
2309 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2310 dev->drvmap[i] = -1;
2311 dev->chanmap[i] = -1;
2312 dev->m_idx[i] = -1;
2313 strcpy(dev->num[i], "???");
2314 init_waitqueue_head(&dev->mdm.info[i].open_wait);
2315 init_waitqueue_head(&dev->mdm.info[i].close_wait);
2316 }
2317 if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
2318 printk(KERN_WARNING "isdn: Could not register control devices\n");
2319 vfree(dev);
2320 return -EIO;
2321 }
2322 if ((isdn_tty_modem_init()) < 0) {
2323 printk(KERN_WARNING "isdn: Could not register tty devices\n");
2324 vfree(dev);
2325 unregister_chrdev(ISDN_MAJOR, "isdn");
2326 return -EIO;
2327 }
2328 #ifdef CONFIG_ISDN_PPP
2329 if (isdn_ppp_init() < 0) {
2330 printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
2331 isdn_tty_exit();
2332 unregister_chrdev(ISDN_MAJOR, "isdn");
2333 vfree(dev);
2334 return -EIO;
2335 }
2336 #endif /* CONFIG_ISDN_PPP */
2337
2338 strcpy(tmprev, isdn_revision);
2339 printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
2340 strcpy(tmprev, isdn_tty_revision);
2341 printk("%s/", isdn_getrev(tmprev));
2342 strcpy(tmprev, isdn_net_revision);
2343 printk("%s/", isdn_getrev(tmprev));
2344 strcpy(tmprev, isdn_ppp_revision);
2345 printk("%s/", isdn_getrev(tmprev));
2346 strcpy(tmprev, isdn_audio_revision);
2347 printk("%s/", isdn_getrev(tmprev));
2348 strcpy(tmprev, isdn_v110_revision);
2349 printk("%s", isdn_getrev(tmprev));
2350
2351 #ifdef MODULE
2352 printk(" loaded\n");
2353 #else
2354 printk("\n");
2355 #endif
2356 isdn_info_update();
2357 return 0;
2358 }
2359
2360 /*
2361 * Unload module
2362 */
2363 static void __exit isdn_exit(void)
2364 {
2365 #ifdef CONFIG_ISDN_PPP
2366 isdn_ppp_cleanup();
2367 #endif
2368 if (isdn_net_rmall() < 0) {
2369 printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
2370 return;
2371 }
2372 isdn_tty_exit();
2373 unregister_chrdev(ISDN_MAJOR, "isdn");
2374 del_timer(&dev->timer);
2375 /* call vfree with interrupts enabled, else it will hang */
2376 vfree(dev);
2377 printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
2378 }
2379
2380 module_init(isdn_init);
2381 module_exit(isdn_exit);
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