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[pohmelfs.git] / drivers / isdn / i4l / isdn_common.c
blob6ddb795e31c50e371eb36d0dbd3dcda23f11978b
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 switch(cm->Command) {
405 case CAPI_FACILITY:
406 /* in the moment only handled in tty */
407 return(isdn_tty_capi_facility(cm));
408 default:
409 return(-1);
410 }
411 }
412
413 static int
414 isdn_status_callback(isdn_ctrl * c)
415 {
416 int di;
417 u_long flags;
418 int i;
419 int r;
420 int retval = 0;
421 isdn_ctrl cmd;
422 isdn_net_dev *p;
423
424 di = c->driver;
425 i = isdn_dc2minor(di, c->arg);
426 switch (c->command) {
427 case ISDN_STAT_BSENT:
428 if (i < 0)
429 return -1;
430 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
431 return 0;
432 if (isdn_net_stat_callback(i, c))
433 return 0;
434 if (isdn_v110_stat_callback(i, c))
435 return 0;
436 if (isdn_tty_stat_callback(i, c))
437 return 0;
438 wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]);
439 break;
440 case ISDN_STAT_STAVAIL:
441 dev->drv[di]->stavail += c->arg;
442 wake_up_interruptible(&dev->drv[di]->st_waitq);
443 break;
444 case ISDN_STAT_RUN:
445 dev->drv[di]->flags |= DRV_FLAG_RUNNING;
446 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
447 if (dev->drvmap[i] == di)
448 isdn_all_eaz(di, dev->chanmap[i]);
449 set_global_features();
450 break;
451 case ISDN_STAT_STOP:
452 dev->drv[di]->flags &= ~DRV_FLAG_RUNNING;
453 break;
454 case ISDN_STAT_ICALL:
455 if (i < 0)
456 return -1;
457 #ifdef ISDN_DEBUG_STATCALLB
458 printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num);
459 #endif
460 if (dev->global_flags & ISDN_GLOBAL_STOPPED) {
461 cmd.driver = di;
462 cmd.arg = c->arg;
463 cmd.command = ISDN_CMD_HANGUP;
464 isdn_command(&cmd);
465 return 0;
466 }
467 /* Try to find a network-interface which will accept incoming call */
468 r = ((c->command == ISDN_STAT_ICALLW) ? 0 : isdn_net_find_icall(di, c->arg, i, &c->parm.setup));
469 switch (r) {
470 case 0:
471 /* No network-device replies.
472 * Try ttyI's.
473 * These return 0 on no match, 1 on match and
474 * 3 on eventually match, if CID is longer.
475 */
476 if (c->command == ISDN_STAT_ICALL)
477 if ((retval = isdn_tty_find_icall(di, c->arg, &c->parm.setup))) return(retval);
478 #ifdef CONFIG_ISDN_DIVERSION
479 if (divert_if)
480 if ((retval = divert_if->stat_callback(c)))
481 return(retval); /* processed */
482 #endif /* CONFIG_ISDN_DIVERSION */
483 if ((!retval) && (dev->drv[di]->flags & DRV_FLAG_REJBUS)) {
484 /* No tty responding */
485 cmd.driver = di;
486 cmd.arg = c->arg;
487 cmd.command = ISDN_CMD_HANGUP;
488 isdn_command(&cmd);
489 retval = 2;
490 }
491 break;
492 case 1:
493 /* Schedule connection-setup */
494 isdn_net_dial();
495 cmd.driver = di;
496 cmd.arg = c->arg;
497 cmd.command = ISDN_CMD_ACCEPTD;
498 for ( p = dev->netdev; p; p = p->next )
499 if ( p->local->isdn_channel == cmd.arg )
500 {
501 strcpy( cmd.parm.setup.eazmsn, p->local->msn );
502 isdn_command(&cmd);
503 retval = 1;
504 break;
505 }
506 break;
507
508 case 2: /* For calling back, first reject incoming call ... */
509 case 3: /* Interface found, but down, reject call actively */
510 retval = 2;
511 printk(KERN_INFO "isdn: Rejecting Call\n");
512 cmd.driver = di;
513 cmd.arg = c->arg;
514 cmd.command = ISDN_CMD_HANGUP;
515 isdn_command(&cmd);
516 if (r == 3)
517 break;
518 /* Fall through */
519 case 4:
520 /* ... then start callback. */
521 isdn_net_dial();
522 break;
523 case 5:
524 /* Number would eventually match, if longer */
525 retval = 3;
526 break;
527 }
528 #ifdef ISDN_DEBUG_STATCALLB
529 printk(KERN_DEBUG "ICALL: ret=%d\n", retval);
530 #endif
531 return retval;
532 break;
533 case ISDN_STAT_CINF:
534 if (i < 0)
535 return -1;
536 #ifdef ISDN_DEBUG_STATCALLB
537 printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num);
538 #endif
539 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
540 return 0;
541 if (strcmp(c->parm.num, "0"))
542 isdn_net_stat_callback(i, c);
543 isdn_tty_stat_callback(i, c);
544 break;
545 case ISDN_STAT_CAUSE:
546 #ifdef ISDN_DEBUG_STATCALLB
547 printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num);
548 #endif
549 printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n",
550 dev->drvid[di], c->arg, c->parm.num);
551 isdn_tty_stat_callback(i, c);
552 #ifdef CONFIG_ISDN_DIVERSION
553 if (divert_if)
554 divert_if->stat_callback(c);
555 #endif /* CONFIG_ISDN_DIVERSION */
556 break;
557 case ISDN_STAT_DISPLAY:
558 #ifdef ISDN_DEBUG_STATCALLB
559 printk(KERN_DEBUG "DISPLAY: %ld %s\n", c->arg, c->parm.display);
560 #endif
561 isdn_tty_stat_callback(i, c);
562 #ifdef CONFIG_ISDN_DIVERSION
563 if (divert_if)
564 divert_if->stat_callback(c);
565 #endif /* CONFIG_ISDN_DIVERSION */
566 break;
567 case ISDN_STAT_DCONN:
568 if (i < 0)
569 return -1;
570 #ifdef ISDN_DEBUG_STATCALLB
571 printk(KERN_DEBUG "DCONN: %ld\n", c->arg);
572 #endif
573 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
574 return 0;
575 /* Find any net-device, waiting for D-channel setup */
576 if (isdn_net_stat_callback(i, c))
577 break;
578 isdn_v110_stat_callback(i, c);
579 /* Find any ttyI, waiting for D-channel setup */
580 if (isdn_tty_stat_callback(i, c)) {
581 cmd.driver = di;
582 cmd.arg = c->arg;
583 cmd.command = ISDN_CMD_ACCEPTB;
584 isdn_command(&cmd);
585 break;
586 }
587 break;
588 case ISDN_STAT_DHUP:
589 if (i < 0)
590 return -1;
591 #ifdef ISDN_DEBUG_STATCALLB
592 printk(KERN_DEBUG "DHUP: %ld\n", c->arg);
593 #endif
594 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
595 return 0;
596 dev->drv[di]->online &= ~(1 << (c->arg));
597 isdn_info_update();
598 /* Signal hangup to network-devices */
599 if (isdn_net_stat_callback(i, c))
600 break;
601 isdn_v110_stat_callback(i, c);
602 if (isdn_tty_stat_callback(i, c))
603 break;
604 #ifdef CONFIG_ISDN_DIVERSION
605 if (divert_if)
606 divert_if->stat_callback(c);
607 #endif /* CONFIG_ISDN_DIVERSION */
608 break;
609 break;
610 case ISDN_STAT_BCONN:
611 if (i < 0)
612 return -1;
613 #ifdef ISDN_DEBUG_STATCALLB
614 printk(KERN_DEBUG "BCONN: %ld\n", c->arg);
615 #endif
616 /* Signal B-channel-connect to network-devices */
617 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
618 return 0;
619 dev->drv[di]->online |= (1 << (c->arg));
620 isdn_info_update();
621 if (isdn_net_stat_callback(i, c))
622 break;
623 isdn_v110_stat_callback(i, c);
624 if (isdn_tty_stat_callback(i, c))
625 break;
626 break;
627 case ISDN_STAT_BHUP:
628 if (i < 0)
629 return -1;
630 #ifdef ISDN_DEBUG_STATCALLB
631 printk(KERN_DEBUG "BHUP: %ld\n", c->arg);
632 #endif
633 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
634 return 0;
635 dev->drv[di]->online &= ~(1 << (c->arg));
636 isdn_info_update();
637 #ifdef CONFIG_ISDN_X25
638 /* Signal hangup to network-devices */
639 if (isdn_net_stat_callback(i, c))
640 break;
641 #endif
642 isdn_v110_stat_callback(i, c);
643 if (isdn_tty_stat_callback(i, c))
644 break;
645 break;
646 case ISDN_STAT_NODCH:
647 if (i < 0)
648 return -1;
649 #ifdef ISDN_DEBUG_STATCALLB
650 printk(KERN_DEBUG "NODCH: %ld\n", c->arg);
651 #endif
652 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
653 return 0;
654 if (isdn_net_stat_callback(i, c))
655 break;
656 if (isdn_tty_stat_callback(i, c))
657 break;
658 break;
659 case ISDN_STAT_ADDCH:
660 spin_lock_irqsave(&dev->lock, flags);
661 if (isdn_add_channels(dev->drv[di], di, c->arg, 1)) {
662 spin_unlock_irqrestore(&dev->lock, flags);
663 return -1;
664 }
665 spin_unlock_irqrestore(&dev->lock, flags);
666 isdn_info_update();
667 break;
668 case ISDN_STAT_DISCH:
669 spin_lock_irqsave(&dev->lock, flags);
670 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
671 if ((dev->drvmap[i] == di) &&
672 (dev->chanmap[i] == c->arg)) {
673 if (c->parm.num[0])
674 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
675 else
676 if (USG_NONE(dev->usage[i])) {
677 dev->usage[i] |= ISDN_USAGE_DISABLED;
678 }
679 else
680 retval = -1;
681 break;
682 }
683 spin_unlock_irqrestore(&dev->lock, flags);
684 isdn_info_update();
685 break;
686 case ISDN_STAT_UNLOAD:
687 while (dev->drv[di]->locks > 0) {
688 isdn_unlock_driver(dev->drv[di]);
689 }
690 spin_lock_irqsave(&dev->lock, flags);
691 isdn_tty_stat_callback(i, c);
692 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
693 if (dev->drvmap[i] == di) {
694 dev->drvmap[i] = -1;
695 dev->chanmap[i] = -1;
696 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
697 }
698 dev->drivers--;
699 dev->channels -= dev->drv[di]->channels;
700 kfree(dev->drv[di]->rcverr);
701 kfree(dev->drv[di]->rcvcount);
702 for (i = 0; i < dev->drv[di]->channels; i++)
703 skb_queue_purge(&dev->drv[di]->rpqueue[i]);
704 kfree(dev->drv[di]->rpqueue);
705 kfree(dev->drv[di]->rcv_waitq);
706 kfree(dev->drv[di]);
707 dev->drv[di] = NULL;
708 dev->drvid[di][0] = '\0';
709 isdn_info_update();
710 set_global_features();
711 spin_unlock_irqrestore(&dev->lock, flags);
712 return 0;
713 case ISDN_STAT_L1ERR:
714 break;
715 case CAPI_PUT_MESSAGE:
716 return(isdn_capi_rec_hl_msg(&c->parm.cmsg));
717 #ifdef CONFIG_ISDN_TTY_FAX
718 case ISDN_STAT_FAXIND:
719 isdn_tty_stat_callback(i, c);
720 break;
721 #endif
722 #ifdef CONFIG_ISDN_AUDIO
723 case ISDN_STAT_AUDIO:
724 isdn_tty_stat_callback(i, c);
725 break;
726 #endif
727 #ifdef CONFIG_ISDN_DIVERSION
728 case ISDN_STAT_PROT:
729 case ISDN_STAT_REDIR:
730 if (divert_if)
731 return(divert_if->stat_callback(c));
732 #endif /* CONFIG_ISDN_DIVERSION */
733 default:
734 return -1;
735 }
736 return 0;
737 }
738
739 /*
740 * Get integer from char-pointer, set pointer to end of number
741 */
742 int
743 isdn_getnum(char **p)
744 {
745 int v = -1;
746
747 while (*p[0] >= '0' && *p[0] <= '9')
748 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0');
749 return v;
750 }
751
752 #define DLE 0x10
753
754 /*
755 * isdn_readbchan() tries to get data from the read-queue.
756 * It MUST be called with interrupts off.
757 *
758 * Be aware that this is not an atomic operation when sleep != 0, even though
759 * interrupts are turned off! Well, like that we are currently only called
760 * on behalf of a read system call on raw device files (which are documented
761 * to be dangerous and for debugging purpose only). The inode semaphore
762 * takes care that this is not called for the same minor device number while
763 * we are sleeping, but access is not serialized against simultaneous read()
764 * from the corresponding ttyI device. Can other ugly events, like changes
765 * of the mapping (di,ch)<->minor, happen during the sleep? --he
766 */
767 int
768 isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, wait_queue_head_t *sleep)
769 {
770 int count;
771 int count_pull;
772 int count_put;
773 int dflag;
774 struct sk_buff *skb;
775 u_char *cp;
776
777 if (!dev->drv[di])
778 return 0;
779 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) {
780 if (sleep)
781 interruptible_sleep_on(sleep);
782 else
783 return 0;
784 }
785 if (len > dev->drv[di]->rcvcount[channel])
786 len = dev->drv[di]->rcvcount[channel];
787 cp = buf;
788 count = 0;
789 while (len) {
790 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
791 break;
792 #ifdef CONFIG_ISDN_AUDIO
793 if (ISDN_AUDIO_SKB_LOCK(skb))
794 break;
795 ISDN_AUDIO_SKB_LOCK(skb) = 1;
796 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
797 char *p = skb->data;
798 unsigned long DLEmask = (1 << channel);
799
800 dflag = 0;
801 count_pull = count_put = 0;
802 while ((count_pull < skb->len) && (len > 0)) {
803 len--;
804 if (dev->drv[di]->DLEflag & DLEmask) {
805 *cp++ = DLE;
806 dev->drv[di]->DLEflag &= ~DLEmask;
807 } else {
808 *cp++ = *p;
809 if (*p == DLE) {
810 dev->drv[di]->DLEflag |= DLEmask;
811 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
812 }
813 p++;
814 count_pull++;
815 }
816 count_put++;
817 }
818 if (count_pull >= skb->len)
819 dflag = 1;
820 } else {
821 #endif
822 /* No DLE's in buff, so simply copy it */
823 dflag = 1;
824 if ((count_pull = skb->len) > len) {
825 count_pull = len;
826 dflag = 0;
827 }
828 count_put = count_pull;
829 skb_copy_from_linear_data(skb, cp, count_put);
830 cp += count_put;
831 len -= count_put;
832 #ifdef CONFIG_ISDN_AUDIO
833 }
834 #endif
835 count += count_put;
836 if (fp) {
837 memset(fp, 0, count_put);
838 fp += count_put;
839 }
840 if (dflag) {
841 /* We got all the data in this buff.
842 * Now we can dequeue it.
843 */
844 if (fp)
845 *(fp - 1) = 0xff;
846 #ifdef CONFIG_ISDN_AUDIO
847 ISDN_AUDIO_SKB_LOCK(skb) = 0;
848 #endif
849 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
850 dev_kfree_skb(skb);
851 } else {
852 /* Not yet emptied this buff, so it
853 * must stay in the queue, for further calls
854 * but we pull off the data we got until now.
855 */
856 skb_pull(skb, count_pull);
857 #ifdef CONFIG_ISDN_AUDIO
858 ISDN_AUDIO_SKB_LOCK(skb) = 0;
859 #endif
860 }
861 dev->drv[di]->rcvcount[channel] -= count_put;
862 }
863 return count;
864 }
865
866 /*
867 * isdn_readbchan_tty() tries to get data from the read-queue.
868 * It MUST be called with interrupts off.
869 *
870 * Be aware that this is not an atomic operation when sleep != 0, even though
871 * interrupts are turned off! Well, like that we are currently only called
872 * on behalf of a read system call on raw device files (which are documented
873 * to be dangerous and for debugging purpose only). The inode semaphore
874 * takes care that this is not called for the same minor device number while
875 * we are sleeping, but access is not serialized against simultaneous read()
876 * from the corresponding ttyI device. Can other ugly events, like changes
877 * of the mapping (di,ch)<->minor, happen during the sleep? --he
878 */
879 int
880 isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
881 {
882 int count;
883 int count_pull;
884 int count_put;
885 int dflag;
886 struct sk_buff *skb;
887 char last = 0;
888 int len;
889
890 if (!dev->drv[di])
891 return 0;
892 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
893 return 0;
894
895 len = tty_buffer_request_room(tty, dev->drv[di]->rcvcount[channel]);
896 if(len == 0)
897 return len;
898
899 count = 0;
900 while (len) {
901 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
902 break;
903 #ifdef CONFIG_ISDN_AUDIO
904 if (ISDN_AUDIO_SKB_LOCK(skb))
905 break;
906 ISDN_AUDIO_SKB_LOCK(skb) = 1;
907 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
908 char *p = skb->data;
909 unsigned long DLEmask = (1 << channel);
910
911 dflag = 0;
912 count_pull = count_put = 0;
913 while ((count_pull < skb->len) && (len > 0)) {
914 /* push every character but the last to the tty buffer directly */
915 if ( count_put )
916 tty_insert_flip_char(tty, last, TTY_NORMAL);
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 mutex_lock(&isdn_mutex);
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 mutex_unlock(&isdn_mutex);
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 mutex_lock(&isdn_mutex);
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 mutex_unlock(&isdn_mutex);
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 mutex_lock(&isdn_mutex);
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 mutex_unlock(&isdn_mutex);
1266 return mask;
1267 }
1268
1269
1270 static int
1271 isdn_ioctl(struct file *file, uint cmd, ulong arg)
1272 {
1273 uint minor = iminor(file->f_path.dentry->d_inode);
1274 isdn_ctrl c;
1275 int drvidx;
1276 int ret;
1277 int i;
1278 char __user *p;
1279 char *s;
1280 union iocpar {
1281 char name[10];
1282 char bname[22];
1283 isdn_ioctl_struct iocts;
1284 isdn_net_ioctl_phone phone;
1285 isdn_net_ioctl_cfg cfg;
1286 } iocpar;
1287 void __user *argp = (void __user *)arg;
1288
1289 #define name iocpar.name
1290 #define bname iocpar.bname
1291 #define iocts iocpar.iocts
1292 #define phone iocpar.phone
1293 #define cfg iocpar.cfg
1294
1295 if (minor == ISDN_MINOR_STATUS) {
1296 switch (cmd) {
1297 case IIOCGETDVR:
1298 return (TTY_DV +
1299 (NET_DV << 8) +
1300 (INF_DV << 16));
1301 case IIOCGETCPS:
1302 if (arg) {
1303 ulong __user *p = argp;
1304 int i;
1305 if (!access_ok(VERIFY_WRITE, p,
1306 sizeof(ulong) * ISDN_MAX_CHANNELS * 2))
1307 return -EFAULT;
1308 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1309 put_user(dev->ibytes[i], p++);
1310 put_user(dev->obytes[i], p++);
1311 }
1312 return 0;
1313 } else
1314 return -EINVAL;
1315 break;
1316 #ifdef CONFIG_NETDEVICES
1317 case IIOCNETGPN:
1318 /* Get peer phone number of a connected
1319 * isdn network interface */
1320 if (arg) {
1321 if (copy_from_user(&phone, argp, sizeof(phone)))
1322 return -EFAULT;
1323 return isdn_net_getpeer(&phone, argp);
1324 } else
1325 return -EINVAL;
1326 #endif
1327 default:
1328 return -EINVAL;
1329 }
1330 }
1331 if (!dev->drivers)
1332 return -ENODEV;
1333 if (minor <= ISDN_MINOR_BMAX) {
1334 drvidx = isdn_minor2drv(minor);
1335 if (drvidx < 0)
1336 return -ENODEV;
1337 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1338 return -ENODEV;
1339 return 0;
1340 }
1341 if (minor <= ISDN_MINOR_CTRLMAX) {
1342 /*
1343 * isdn net devices manage lots of configuration variables as linked lists.
1344 * Those lists must only be manipulated from user space. Some of the ioctl's
1345 * service routines access user space and are not atomic. Therefore, ioctl's
1346 * manipulating the lists and ioctl's sleeping while accessing the lists
1347 * are serialized by means of a semaphore.
1348 */
1349 switch (cmd) {
1350 case IIOCNETDWRSET:
1351 printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
1352 return(-EINVAL);
1353 case IIOCNETLCR:
1354 printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
1355 return -ENODEV;
1356 #ifdef CONFIG_NETDEVICES
1357 case IIOCNETAIF:
1358 /* Add a network-interface */
1359 if (arg) {
1360 if (copy_from_user(name, argp, sizeof(name)))
1361 return -EFAULT;
1362 s = name;
1363 } else {
1364 s = NULL;
1365 }
1366 ret = mutex_lock_interruptible(&dev->mtx);
1367 if( ret ) return ret;
1368 if ((s = isdn_net_new(s, NULL))) {
1369 if (copy_to_user(argp, s, strlen(s) + 1)){
1370 ret = -EFAULT;
1371 } else {
1372 ret = 0;
1373 }
1374 } else
1375 ret = -ENODEV;
1376 mutex_unlock(&dev->mtx);
1377 return ret;
1378 case IIOCNETASL:
1379 /* Add a slave to a network-interface */
1380 if (arg) {
1381 if (copy_from_user(bname, argp, sizeof(bname) - 1))
1382 return -EFAULT;
1383 } else
1384 return -EINVAL;
1385 ret = mutex_lock_interruptible(&dev->mtx);
1386 if( ret ) return ret;
1387 if ((s = isdn_net_newslave(bname))) {
1388 if (copy_to_user(argp, s, strlen(s) + 1)){
1389 ret = -EFAULT;
1390 } else {
1391 ret = 0;
1392 }
1393 } else
1394 ret = -ENODEV;
1395 mutex_unlock(&dev->mtx);
1396 return ret;
1397 case IIOCNETDIF:
1398 /* Delete a network-interface */
1399 if (arg) {
1400 if (copy_from_user(name, argp, sizeof(name)))
1401 return -EFAULT;
1402 ret = mutex_lock_interruptible(&dev->mtx);
1403 if( ret ) return ret;
1404 ret = isdn_net_rm(name);
1405 mutex_unlock(&dev->mtx);
1406 return ret;
1407 } else
1408 return -EINVAL;
1409 case IIOCNETSCF:
1410 /* Set configurable parameters of a network-interface */
1411 if (arg) {
1412 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1413 return -EFAULT;
1414 return isdn_net_setcfg(&cfg);
1415 } else
1416 return -EINVAL;
1417 case IIOCNETGCF:
1418 /* Get configurable parameters of a network-interface */
1419 if (arg) {
1420 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1421 return -EFAULT;
1422 if (!(ret = isdn_net_getcfg(&cfg))) {
1423 if (copy_to_user(argp, &cfg, sizeof(cfg)))
1424 return -EFAULT;
1425 }
1426 return ret;
1427 } else
1428 return -EINVAL;
1429 case IIOCNETANM:
1430 /* Add a phone-number to a network-interface */
1431 if (arg) {
1432 if (copy_from_user(&phone, argp, sizeof(phone)))
1433 return -EFAULT;
1434 ret = mutex_lock_interruptible(&dev->mtx);
1435 if( ret ) return ret;
1436 ret = isdn_net_addphone(&phone);
1437 mutex_unlock(&dev->mtx);
1438 return ret;
1439 } else
1440 return -EINVAL;
1441 case IIOCNETGNM:
1442 /* Get list of phone-numbers of a network-interface */
1443 if (arg) {
1444 if (copy_from_user(&phone, argp, sizeof(phone)))
1445 return -EFAULT;
1446 ret = mutex_lock_interruptible(&dev->mtx);
1447 if( ret ) return ret;
1448 ret = isdn_net_getphones(&phone, argp);
1449 mutex_unlock(&dev->mtx);
1450 return ret;
1451 } else
1452 return -EINVAL;
1453 case IIOCNETDNM:
1454 /* Delete a phone-number of a network-interface */
1455 if (arg) {
1456 if (copy_from_user(&phone, argp, sizeof(phone)))
1457 return -EFAULT;
1458 ret = mutex_lock_interruptible(&dev->mtx);
1459 if( ret ) return ret;
1460 ret = isdn_net_delphone(&phone);
1461 mutex_unlock(&dev->mtx);
1462 return ret;
1463 } else
1464 return -EINVAL;
1465 case IIOCNETDIL:
1466 /* Force dialing of a network-interface */
1467 if (arg) {
1468 if (copy_from_user(name, argp, sizeof(name)))
1469 return -EFAULT;
1470 return isdn_net_force_dial(name);
1471 } else
1472 return -EINVAL;
1473 #ifdef CONFIG_ISDN_PPP
1474 case IIOCNETALN:
1475 if (!arg)
1476 return -EINVAL;
1477 if (copy_from_user(name, argp, sizeof(name)))
1478 return -EFAULT;
1479 return isdn_ppp_dial_slave(name);
1480 case IIOCNETDLN:
1481 if (!arg)
1482 return -EINVAL;
1483 if (copy_from_user(name, argp, sizeof(name)))
1484 return -EFAULT;
1485 return isdn_ppp_hangup_slave(name);
1486 #endif
1487 case IIOCNETHUP:
1488 /* Force hangup of a network-interface */
1489 if (!arg)
1490 return -EINVAL;
1491 if (copy_from_user(name, argp, sizeof(name)))
1492 return -EFAULT;
1493 return isdn_net_force_hangup(name);
1494 break;
1495 #endif /* CONFIG_NETDEVICES */
1496 case IIOCSETVER:
1497 dev->net_verbose = arg;
1498 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1499 return 0;
1500 case IIOCSETGST:
1501 if (arg)
1502 dev->global_flags |= ISDN_GLOBAL_STOPPED;
1503 else
1504 dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1505 printk(KERN_INFO "isdn: Global Mode %s\n",
1506 (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1507 return 0;
1508 case IIOCSETBRJ:
1509 drvidx = -1;
1510 if (arg) {
1511 int i;
1512 char *p;
1513 if (copy_from_user(&iocts, argp,
1514 sizeof(isdn_ioctl_struct)))
1515 return -EFAULT;
1516 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1517 if (strlen(iocts.drvid)) {
1518 if ((p = strchr(iocts.drvid, ',')))
1519 *p = 0;
1520 drvidx = -1;
1521 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1522 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1523 drvidx = i;
1524 break;
1525 }
1526 }
1527 }
1528 if (drvidx == -1)
1529 return -ENODEV;
1530 if (iocts.arg)
1531 dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
1532 else
1533 dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
1534 return 0;
1535 case IIOCSIGPRF:
1536 dev->profd = current;
1537 return 0;
1538 break;
1539 case IIOCGETPRF:
1540 /* Get all Modem-Profiles */
1541 if (arg) {
1542 char __user *p = argp;
1543 int i;
1544
1545 if (!access_ok(VERIFY_WRITE, argp,
1546 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1547 * ISDN_MAX_CHANNELS))
1548 return -EFAULT;
1549
1550 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1551 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1552 ISDN_MODEM_NUMREG))
1553 return -EFAULT;
1554 p += ISDN_MODEM_NUMREG;
1555 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1556 return -EFAULT;
1557 p += ISDN_MSNLEN;
1558 if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
1559 return -EFAULT;
1560 p += ISDN_LMSNLEN;
1561 }
1562 return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
1563 } else
1564 return -EINVAL;
1565 break;
1566 case IIOCSETPRF:
1567 /* Set all Modem-Profiles */
1568 if (arg) {
1569 char __user *p = argp;
1570 int i;
1571
1572 if (!access_ok(VERIFY_READ, argp,
1573 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1574 * ISDN_MAX_CHANNELS))
1575 return -EFAULT;
1576
1577 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1578 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1579 ISDN_MODEM_NUMREG))
1580 return -EFAULT;
1581 p += ISDN_MODEM_NUMREG;
1582 if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
1583 return -EFAULT;
1584 p += ISDN_LMSNLEN;
1585 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1586 return -EFAULT;
1587 p += ISDN_MSNLEN;
1588 }
1589 return 0;
1590 } else
1591 return -EINVAL;
1592 break;
1593 case IIOCSETMAP:
1594 case IIOCGETMAP:
1595 /* Set/Get MSN->EAZ-Mapping for a driver */
1596 if (arg) {
1597
1598 if (copy_from_user(&iocts, argp,
1599 sizeof(isdn_ioctl_struct)))
1600 return -EFAULT;
1601 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
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 snprintf(bname, sizeof(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 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1677 if (strlen(iocts.drvid)) {
1678 if ((p = strchr(iocts.drvid, ',')))
1679 *p = 0;
1680 drvidx = -1;
1681 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1682 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1683 drvidx = i;
1684 break;
1685 }
1686 } else
1687 drvidx = 0;
1688 if (drvidx == -1)
1689 return -ENODEV;
1690 if (!access_ok(VERIFY_WRITE, argp,
1691 sizeof(isdn_ioctl_struct)))
1692 return -EFAULT;
1693 c.driver = drvidx;
1694 c.command = ISDN_CMD_IOCTL;
1695 c.arg = cmd;
1696 memcpy(c.parm.num, &iocts.arg, sizeof(ulong));
1697 ret = isdn_command(&c);
1698 memcpy(&iocts.arg, c.parm.num, sizeof(ulong));
1699 if (copy_to_user(argp, &iocts, sizeof(isdn_ioctl_struct)))
1700 return -EFAULT;
1701 return ret;
1702 } else
1703 return -EINVAL;
1704 }
1705 }
1706 #ifdef CONFIG_ISDN_PPP
1707 if (minor <= ISDN_MINOR_PPPMAX)
1708 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1709 #endif
1710 return -ENODEV;
1711
1712 #undef name
1713 #undef bname
1714 #undef iocts
1715 #undef phone
1716 #undef cfg
1717 }
1718
1719 static long
1720 isdn_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1721 {
1722 int ret;
1723
1724 mutex_lock(&isdn_mutex);
1725 ret = isdn_ioctl(file, cmd, arg);
1726 mutex_unlock(&isdn_mutex);
1727
1728 return ret;
1729 }
1730
1731 /*
1732 * Open the device code.
1733 */
1734 static int
1735 isdn_open(struct inode *ino, struct file *filep)
1736 {
1737 uint minor = iminor(ino);
1738 int drvidx;
1739 int chidx;
1740 int retval = -ENODEV;
1741
1742 mutex_lock(&isdn_mutex);
1743 if (minor == ISDN_MINOR_STATUS) {
1744 infostruct *p;
1745
1746 if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1747 p->next = (char *) dev->infochain;
1748 p->private = (char *) &(filep->private_data);
1749 dev->infochain = p;
1750 /* At opening we allow a single update */
1751 filep->private_data = (char *) 1;
1752 retval = 0;
1753 goto out;
1754 } else {
1755 retval = -ENOMEM;
1756 goto out;
1757 }
1758 }
1759 if (!dev->channels)
1760 goto out;
1761 if (minor <= ISDN_MINOR_BMAX) {
1762 printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
1763 drvidx = isdn_minor2drv(minor);
1764 if (drvidx < 0)
1765 goto out;
1766 chidx = isdn_minor2chan(minor);
1767 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1768 goto out;
1769 if (!(dev->drv[drvidx]->online & (1 << chidx)))
1770 goto out;
1771 isdn_lock_drivers();
1772 retval = 0;
1773 goto out;
1774 }
1775 if (minor <= ISDN_MINOR_CTRLMAX) {
1776 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1777 if (drvidx < 0)
1778 goto out;
1779 isdn_lock_drivers();
1780 retval = 0;
1781 goto out;
1782 }
1783 #ifdef CONFIG_ISDN_PPP
1784 if (minor <= ISDN_MINOR_PPPMAX) {
1785 retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
1786 if (retval == 0)
1787 isdn_lock_drivers();
1788 goto out;
1789 }
1790 #endif
1791 out:
1792 nonseekable_open(ino, filep);
1793 mutex_unlock(&isdn_mutex);
1794 return retval;
1795 }
1796
1797 static int
1798 isdn_close(struct inode *ino, struct file *filep)
1799 {
1800 uint minor = iminor(ino);
1801
1802 mutex_lock(&isdn_mutex);
1803 if (minor == ISDN_MINOR_STATUS) {
1804 infostruct *p = dev->infochain;
1805 infostruct *q = NULL;
1806
1807 while (p) {
1808 if (p->private == (char *) &(filep->private_data)) {
1809 if (q)
1810 q->next = p->next;
1811 else
1812 dev->infochain = (infostruct *) (p->next);
1813 kfree(p);
1814 goto out;
1815 }
1816 q = p;
1817 p = (infostruct *) (p->next);
1818 }
1819 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1820 goto out;
1821 }
1822 isdn_unlock_drivers();
1823 if (minor <= ISDN_MINOR_BMAX)
1824 goto out;
1825 if (minor <= ISDN_MINOR_CTRLMAX) {
1826 if (dev->profd == current)
1827 dev->profd = NULL;
1828 goto out;
1829 }
1830 #ifdef CONFIG_ISDN_PPP
1831 if (minor <= ISDN_MINOR_PPPMAX)
1832 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1833 #endif
1834
1835 out:
1836 mutex_unlock(&isdn_mutex);
1837 return 0;
1838 }
1839
1840 static const struct file_operations isdn_fops =
1841 {
1842 .owner = THIS_MODULE,
1843 .llseek = no_llseek,
1844 .read = isdn_read,
1845 .write = isdn_write,
1846 .poll = isdn_poll,
1847 .unlocked_ioctl = isdn_unlocked_ioctl,
1848 .open = isdn_open,
1849 .release = isdn_close,
1850 };
1851
1852 char *
1853 isdn_map_eaz2msn(char *msn, int di)
1854 {
1855 isdn_driver_t *this = dev->drv[di];
1856 int i;
1857
1858 if (strlen(msn) == 1) {
1859 i = msn[0] - '0';
1860 if ((i >= 0) && (i <= 9))
1861 if (strlen(this->msn2eaz[i]))
1862 return (this->msn2eaz[i]);
1863 }
1864 return (msn);
1865 }
1866
1867 /*
1868 * Find an unused ISDN-channel, whose feature-flags match the
1869 * given L2- and L3-protocols.
1870 */
1871 #define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038))
1872
1873 /*
1874 * This function must be called with holding the dev->lock.
1875 */
1876 int
1877 isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1878 ,int pre_chan, char *msn)
1879 {
1880 int i;
1881 ulong features;
1882 ulong vfeatures;
1883
1884 features = ((1 << l2_proto) | (0x10000 << l3_proto));
1885 vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1886 ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038));
1887 /* If Layer-2 protocol is V.110, accept drivers with
1888 * transparent feature even if these don't support V.110
1889 * because we can emulate this in linklevel.
1890 */
1891 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1892 if (USG_NONE(dev->usage[i]) &&
1893 (dev->drvmap[i] != -1)) {
1894 int d = dev->drvmap[i];
1895 if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1896 ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1897 continue;
1898 if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
1899 continue;
1900 if (dev->usage[i] & ISDN_USAGE_DISABLED)
1901 continue; /* usage not allowed */
1902 if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
1903 if (((dev->drv[d]->interface->features & features) == features) ||
1904 (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1905 (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1906 if ((pre_dev < 0) || (pre_chan < 0)) {
1907 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1908 dev->usage[i] |= usage;
1909 isdn_info_update();
1910 return i;
1911 } else {
1912 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1913 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1914 dev->usage[i] |= usage;
1915 isdn_info_update();
1916 return i;
1917 }
1918 }
1919 }
1920 }
1921 }
1922 return -1;
1923 }
1924
1925 /*
1926 * Set state of ISDN-channel to 'unused'
1927 */
1928 void
1929 isdn_free_channel(int di, int ch, int usage)
1930 {
1931 int i;
1932
1933 if ((di < 0) || (ch < 0)) {
1934 printk(KERN_WARNING "%s: called with invalid drv(%d) or channel(%d)\n",
1935 __func__, di, ch);
1936 return;
1937 }
1938 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1939 if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
1940 (dev->drvmap[i] == di) &&
1941 (dev->chanmap[i] == ch)) {
1942 dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1943 strcpy(dev->num[i], "???");
1944 dev->ibytes[i] = 0;
1945 dev->obytes[i] = 0;
1946 // 20.10.99 JIM, try to reinitialize v110 !
1947 dev->v110emu[i] = 0;
1948 atomic_set(&(dev->v110use[i]), 0);
1949 isdn_v110_close(dev->v110[i]);
1950 dev->v110[i] = NULL;
1951 // 20.10.99 JIM, try to reinitialize v110 !
1952 isdn_info_update();
1953 if (dev->drv[di])
1954 skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
1955 }
1956 }
1957
1958 /*
1959 * Cancel Exclusive-Flag for ISDN-channel
1960 */
1961 void
1962 isdn_unexclusive_channel(int di, int ch)
1963 {
1964 int i;
1965
1966 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1967 if ((dev->drvmap[i] == di) &&
1968 (dev->chanmap[i] == ch)) {
1969 dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1970 isdn_info_update();
1971 return;
1972 }
1973 }
1974
1975 /*
1976 * writebuf replacement for SKB_ABLE drivers
1977 */
1978 static int
1979 isdn_writebuf_stub(int drvidx, int chan, const u_char __user * buf, int len)
1980 {
1981 int ret;
1982 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1983 struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1984
1985 if (!skb)
1986 return -ENOMEM;
1987 skb_reserve(skb, hl);
1988 if (copy_from_user(skb_put(skb, len), buf, len)) {
1989 dev_kfree_skb(skb);
1990 return -EFAULT;
1991 }
1992 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
1993 if (ret <= 0)
1994 dev_kfree_skb(skb);
1995 if (ret > 0)
1996 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
1997 return ret;
1998 }
1999
2000 /*
2001 * Return: length of data on success, -ERRcode on failure.
2002 */
2003 int
2004 isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
2005 {
2006 int ret;
2007 struct sk_buff *nskb = NULL;
2008 int v110_ret = skb->len;
2009 int idx = isdn_dc2minor(drvidx, chan);
2010
2011 if (dev->v110[idx]) {
2012 atomic_inc(&dev->v110use[idx]);
2013 nskb = isdn_v110_encode(dev->v110[idx], skb);
2014 atomic_dec(&dev->v110use[idx]);
2015 if (!nskb)
2016 return 0;
2017 v110_ret = *((int *)nskb->data);
2018 skb_pull(nskb, sizeof(int));
2019 if (!nskb->len) {
2020 dev_kfree_skb(nskb);
2021 return v110_ret;
2022 }
2023 /* V.110 must always be acknowledged */
2024 ack = 1;
2025 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
2026 } else {
2027 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
2028
2029 if( skb_headroom(skb) < hl ){
2030 /*
2031 * This should only occur when new HL driver with
2032 * increased hl_hdrlen was loaded after netdevice
2033 * was created and connected to the new driver.
2034 *
2035 * The V.110 branch (re-allocates on its own) does
2036 * not need this
2037 */
2038 struct sk_buff * skb_tmp;
2039
2040 skb_tmp = skb_realloc_headroom(skb, hl);
2041 printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
2042 if (!skb_tmp) return -ENOMEM; /* 0 better? */
2043 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
2044 if( ret > 0 ){
2045 dev_kfree_skb(skb);
2046 } else {
2047 dev_kfree_skb(skb_tmp);
2048 }
2049 } else {
2050 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
2051 }
2052 }
2053 if (ret > 0) {
2054 dev->obytes[idx] += ret;
2055 if (dev->v110[idx]) {
2056 atomic_inc(&dev->v110use[idx]);
2057 dev->v110[idx]->skbuser++;
2058 atomic_dec(&dev->v110use[idx]);
2059 /* For V.110 return unencoded data length */
2060 ret = v110_ret;
2061 /* if the complete frame was send we free the skb;
2062 if not upper function will requeue the skb */
2063 if (ret == skb->len)
2064 dev_kfree_skb(skb);
2065 }
2066 } else
2067 if (dev->v110[idx])
2068 dev_kfree_skb(nskb);
2069 return ret;
2070 }
2071
2072 static int
2073 isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
2074 {
2075 int j, k, m;
2076
2077 init_waitqueue_head(&d->st_waitq);
2078 if (d->flags & DRV_FLAG_RUNNING)
2079 return -1;
2080 if (n < 1) return 0;
2081
2082 m = (adding) ? d->channels + n : n;
2083
2084 if (dev->channels + n > ISDN_MAX_CHANNELS) {
2085 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
2086 ISDN_MAX_CHANNELS);
2087 return -1;
2088 }
2089
2090 if ((adding) && (d->rcverr))
2091 kfree(d->rcverr);
2092 if (!(d->rcverr = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2093 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
2094 return -1;
2095 }
2096
2097 if ((adding) && (d->rcvcount))
2098 kfree(d->rcvcount);
2099 if (!(d->rcvcount = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2100 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
2101 if (!adding)
2102 kfree(d->rcverr);
2103 return -1;
2104 }
2105
2106 if ((adding) && (d->rpqueue)) {
2107 for (j = 0; j < d->channels; j++)
2108 skb_queue_purge(&d->rpqueue[j]);
2109 kfree(d->rpqueue);
2110 }
2111 if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_ATOMIC))) {
2112 printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
2113 if (!adding) {
2114 kfree(d->rcvcount);
2115 kfree(d->rcverr);
2116 }
2117 return -1;
2118 }
2119 for (j = 0; j < m; j++) {
2120 skb_queue_head_init(&d->rpqueue[j]);
2121 }
2122
2123 if ((adding) && (d->rcv_waitq))
2124 kfree(d->rcv_waitq);
2125 d->rcv_waitq = kmalloc(sizeof(wait_queue_head_t) * 2 * m, GFP_ATOMIC);
2126 if (!d->rcv_waitq) {
2127 printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
2128 if (!adding) {
2129 kfree(d->rpqueue);
2130 kfree(d->rcvcount);
2131 kfree(d->rcverr);
2132 }
2133 return -1;
2134 }
2135 d->snd_waitq = d->rcv_waitq + m;
2136 for (j = 0; j < m; j++) {
2137 init_waitqueue_head(&d->rcv_waitq[j]);
2138 init_waitqueue_head(&d->snd_waitq[j]);
2139 }
2140
2141 dev->channels += n;
2142 for (j = d->channels; j < m; j++)
2143 for (k = 0; k < ISDN_MAX_CHANNELS; k++)
2144 if (dev->chanmap[k] < 0) {
2145 dev->chanmap[k] = j;
2146 dev->drvmap[k] = drvidx;
2147 break;
2148 }
2149 d->channels = m;
2150 return 0;
2151 }
2152
2153 /*
2154 * Low-level-driver registration
2155 */
2156
2157 static void
2158 set_global_features(void)
2159 {
2160 int drvidx;
2161
2162 dev->global_features = 0;
2163 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
2164 if (!dev->drv[drvidx])
2165 continue;
2166 if (dev->drv[drvidx]->interface)
2167 dev->global_features |= dev->drv[drvidx]->interface->features;
2168 }
2169 }
2170
2171 #ifdef CONFIG_ISDN_DIVERSION
2172
2173 static char *map_drvname(int di)
2174 {
2175 if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
2176 return(NULL);
2177 return(dev->drvid[di]); /* driver name */
2178 } /* map_drvname */
2179
2180 static int map_namedrv(char *id)
2181 { int i;
2182
2183 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2184 { if (!strcmp(dev->drvid[i],id))
2185 return(i);
2186 }
2187 return(-1);
2188 } /* map_namedrv */
2189
2190 int DIVERT_REG_NAME(isdn_divert_if *i_div)
2191 {
2192 if (i_div->if_magic != DIVERT_IF_MAGIC)
2193 return(DIVERT_VER_ERR);
2194 switch (i_div->cmd)
2195 {
2196 case DIVERT_CMD_REL:
2197 if (divert_if != i_div)
2198 return(DIVERT_REL_ERR);
2199 divert_if = NULL; /* free interface */
2200 return(DIVERT_NO_ERR);
2201
2202 case DIVERT_CMD_REG:
2203 if (divert_if)
2204 return(DIVERT_REG_ERR);
2205 i_div->ll_cmd = isdn_command; /* set command function */
2206 i_div->drv_to_name = map_drvname;
2207 i_div->name_to_drv = map_namedrv;
2208 divert_if = i_div; /* remember interface */
2209 return(DIVERT_NO_ERR);
2210
2211 default:
2212 return(DIVERT_CMD_ERR);
2213 }
2214 } /* DIVERT_REG_NAME */
2215
2216 EXPORT_SYMBOL(DIVERT_REG_NAME);
2217
2218 #endif /* CONFIG_ISDN_DIVERSION */
2219
2220
2221 EXPORT_SYMBOL(register_isdn);
2222 #ifdef CONFIG_ISDN_PPP
2223 EXPORT_SYMBOL(isdn_ppp_register_compressor);
2224 EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
2225 #endif
2226
2227 int
2228 register_isdn(isdn_if * i)
2229 {
2230 isdn_driver_t *d;
2231 int j;
2232 ulong flags;
2233 int drvidx;
2234
2235 if (dev->drivers >= ISDN_MAX_DRIVERS) {
2236 printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
2237 ISDN_MAX_DRIVERS);
2238 return 0;
2239 }
2240 if (!i->writebuf_skb) {
2241 printk(KERN_WARNING "register_isdn: No write routine given.\n");
2242 return 0;
2243 }
2244 if (!(d = kzalloc(sizeof(isdn_driver_t), GFP_KERNEL))) {
2245 printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
2246 return 0;
2247 }
2248
2249 d->maxbufsize = i->maxbufsize;
2250 d->pktcount = 0;
2251 d->stavail = 0;
2252 d->flags = DRV_FLAG_LOADED;
2253 d->online = 0;
2254 d->interface = i;
2255 d->channels = 0;
2256 spin_lock_irqsave(&dev->lock, flags);
2257 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2258 if (!dev->drv[drvidx])
2259 break;
2260 if (isdn_add_channels(d, drvidx, i->channels, 0)) {
2261 spin_unlock_irqrestore(&dev->lock, flags);
2262 kfree(d);
2263 return 0;
2264 }
2265 i->channels = drvidx;
2266 i->rcvcallb_skb = isdn_receive_skb_callback;
2267 i->statcallb = isdn_status_callback;
2268 if (!strlen(i->id))
2269 sprintf(i->id, "line%d", drvidx);
2270 for (j = 0; j < drvidx; j++)
2271 if (!strcmp(i->id, dev->drvid[j]))
2272 sprintf(i->id, "line%d", drvidx);
2273 dev->drv[drvidx] = d;
2274 strcpy(dev->drvid[drvidx], i->id);
2275 isdn_info_update();
2276 dev->drivers++;
2277 set_global_features();
2278 spin_unlock_irqrestore(&dev->lock, flags);
2279 return 1;
2280 }
2281
2282 /*
2283 *****************************************************************************
2284 * And now the modules code.
2285 *****************************************************************************
2286 */
2287
2288 static char *
2289 isdn_getrev(const char *revision)
2290 {
2291 char *rev;
2292 char *p;
2293
2294 if ((p = strchr(revision, ':'))) {
2295 rev = p + 2;
2296 p = strchr(rev, '$');
2297 *--p = 0;
2298 } else
2299 rev = "???";
2300 return rev;
2301 }
2302
2303 /*
2304 * Allocate and initialize all data, register modem-devices
2305 */
2306 static int __init isdn_init(void)
2307 {
2308 int i;
2309 char tmprev[50];
2310
2311 dev = vzalloc(sizeof(isdn_dev));
2312 if (!dev) {
2313 printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
2314 return -EIO;
2315 }
2316 init_timer(&dev->timer);
2317 dev->timer.function = isdn_timer_funct;
2318 spin_lock_init(&dev->lock);
2319 spin_lock_init(&dev->timerlock);
2320 #ifdef MODULE
2321 dev->owner = THIS_MODULE;
2322 #endif
2323 mutex_init(&dev->mtx);
2324 init_waitqueue_head(&dev->info_waitq);
2325 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2326 dev->drvmap[i] = -1;
2327 dev->chanmap[i] = -1;
2328 dev->m_idx[i] = -1;
2329 strcpy(dev->num[i], "???");
2330 init_waitqueue_head(&dev->mdm.info[i].open_wait);
2331 init_waitqueue_head(&dev->mdm.info[i].close_wait);
2332 }
2333 if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
2334 printk(KERN_WARNING "isdn: Could not register control devices\n");
2335 vfree(dev);
2336 return -EIO;
2337 }
2338 if ((isdn_tty_modem_init()) < 0) {
2339 printk(KERN_WARNING "isdn: Could not register tty devices\n");
2340 vfree(dev);
2341 unregister_chrdev(ISDN_MAJOR, "isdn");
2342 return -EIO;
2343 }
2344 #ifdef CONFIG_ISDN_PPP
2345 if (isdn_ppp_init() < 0) {
2346 printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
2347 isdn_tty_exit();
2348 unregister_chrdev(ISDN_MAJOR, "isdn");
2349 vfree(dev);
2350 return -EIO;
2351 }
2352 #endif /* CONFIG_ISDN_PPP */
2353
2354 strcpy(tmprev, isdn_revision);
2355 printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
2356 strcpy(tmprev, isdn_tty_revision);
2357 printk("%s/", isdn_getrev(tmprev));
2358 strcpy(tmprev, isdn_net_revision);
2359 printk("%s/", isdn_getrev(tmprev));
2360 strcpy(tmprev, isdn_ppp_revision);
2361 printk("%s/", isdn_getrev(tmprev));
2362 strcpy(tmprev, isdn_audio_revision);
2363 printk("%s/", isdn_getrev(tmprev));
2364 strcpy(tmprev, isdn_v110_revision);
2365 printk("%s", isdn_getrev(tmprev));
2366
2367 #ifdef MODULE
2368 printk(" loaded\n");
2369 #else
2370 printk("\n");
2371 #endif
2372 isdn_info_update();
2373 return 0;
2374 }
2375
2376 /*
2377 * Unload module
2378 */
2379 static void __exit isdn_exit(void)
2380 {
2381 #ifdef CONFIG_ISDN_PPP
2382 isdn_ppp_cleanup();
2383 #endif
2384 if (isdn_net_rmall() < 0) {
2385 printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
2386 return;
2387 }
2388 isdn_tty_exit();
2389 unregister_chrdev(ISDN_MAJOR, "isdn");
2390 del_timer(&dev->timer);
2391 /* call vfree with interrupts enabled, else it will hang */
2392 vfree(dev);
2393 printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
2394 }
2395
2396 module_init(isdn_init);
2397 module_exit(isdn_exit);