?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Linux 2.6.34-rc3
[pohmelfs.git] / drivers / isdn / i4l / isdn_common.c
blob00c60e2e0ff70fa7c398c2b8688dc20d0ca3b793
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 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 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 /* push every character but the last to the tty buffer directly */
918 if ( count_put )
919 tty_insert_flip_char(tty, last, TTY_NORMAL);
920 len--;
921 if (dev->drv[di]->DLEflag & DLEmask) {
922 last = DLE;
923 dev->drv[di]->DLEflag &= ~DLEmask;
924 } else {
925 last = *p;
926 if (last == DLE) {
927 dev->drv[di]->DLEflag |= DLEmask;
928 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
929 }
930 p++;
931 count_pull++;
932 }
933 count_put++;
934 }
935 if (count_pull >= skb->len)
936 dflag = 1;
937 } else {
938 #endif
939 /* No DLE's in buff, so simply copy it */
940 dflag = 1;
941 if ((count_pull = skb->len) > len) {
942 count_pull = len;
943 dflag = 0;
944 }
945 count_put = count_pull;
946 if(count_put > 1)
947 tty_insert_flip_string(tty, skb->data, count_put - 1);
948 last = skb->data[count_put - 1];
949 len -= count_put;
950 #ifdef CONFIG_ISDN_AUDIO
951 }
952 #endif
953 count += count_put;
954 if (dflag) {
955 /* We got all the data in this buff.
956 * Now we can dequeue it.
957 */
958 if(cisco_hack)
959 tty_insert_flip_char(tty, last, 0xFF);
960 else
961 tty_insert_flip_char(tty, last, TTY_NORMAL);
962 #ifdef CONFIG_ISDN_AUDIO
963 ISDN_AUDIO_SKB_LOCK(skb) = 0;
964 #endif
965 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
966 dev_kfree_skb(skb);
967 } else {
968 tty_insert_flip_char(tty, last, TTY_NORMAL);
969 /* Not yet emptied this buff, so it
970 * must stay in the queue, for further calls
971 * but we pull off the data we got until now.
972 */
973 skb_pull(skb, count_pull);
974 #ifdef CONFIG_ISDN_AUDIO
975 ISDN_AUDIO_SKB_LOCK(skb) = 0;
976 #endif
977 }
978 dev->drv[di]->rcvcount[channel] -= count_put;
979 }
980 return count;
981 }
982
983
984 static inline int
985 isdn_minor2drv(int minor)
986 {
987 return (dev->drvmap[minor]);
988 }
989
990 static inline int
991 isdn_minor2chan(int minor)
992 {
993 return (dev->chanmap[minor]);
994 }
995
996 static char *
997 isdn_statstr(void)
998 {
999 static char istatbuf[2048];
1000 char *p;
1001 int i;
1002
1003 sprintf(istatbuf, "idmap:\t");
1004 p = istatbuf + strlen(istatbuf);
1005 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1006 sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]);
1007 p = istatbuf + strlen(istatbuf);
1008 }
1009 sprintf(p, "\nchmap:\t");
1010 p = istatbuf + strlen(istatbuf);
1011 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1012 sprintf(p, "%d ", dev->chanmap[i]);
1013 p = istatbuf + strlen(istatbuf);
1014 }
1015 sprintf(p, "\ndrmap:\t");
1016 p = istatbuf + strlen(istatbuf);
1017 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1018 sprintf(p, "%d ", dev->drvmap[i]);
1019 p = istatbuf + strlen(istatbuf);
1020 }
1021 sprintf(p, "\nusage:\t");
1022 p = istatbuf + strlen(istatbuf);
1023 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1024 sprintf(p, "%d ", dev->usage[i]);
1025 p = istatbuf + strlen(istatbuf);
1026 }
1027 sprintf(p, "\nflags:\t");
1028 p = istatbuf + strlen(istatbuf);
1029 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
1030 if (dev->drv[i]) {
1031 sprintf(p, "%ld ", dev->drv[i]->online);
1032 p = istatbuf + strlen(istatbuf);
1033 } else {
1034 sprintf(p, "? ");
1035 p = istatbuf + strlen(istatbuf);
1036 }
1037 }
1038 sprintf(p, "\nphone:\t");
1039 p = istatbuf + strlen(istatbuf);
1040 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1041 sprintf(p, "%s ", dev->num[i]);
1042 p = istatbuf + strlen(istatbuf);
1043 }
1044 sprintf(p, "\n");
1045 return istatbuf;
1046 }
1047
1048 /* Module interface-code */
1049
1050 void
1051 isdn_info_update(void)
1052 {
1053 infostruct *p = dev->infochain;
1054
1055 while (p) {
1056 *(p->private) = 1;
1057 p = (infostruct *) p->next;
1058 }
1059 wake_up_interruptible(&(dev->info_waitq));
1060 }
1061
1062 static ssize_t
1063 isdn_read(struct file *file, char __user *buf, size_t count, loff_t * off)
1064 {
1065 uint minor = iminor(file->f_path.dentry->d_inode);
1066 int len = 0;
1067 int drvidx;
1068 int chidx;
1069 int retval;
1070 char *p;
1071
1072 lock_kernel();
1073 if (minor == ISDN_MINOR_STATUS) {
1074 if (!file->private_data) {
1075 if (file->f_flags & O_NONBLOCK) {
1076 retval = -EAGAIN;
1077 goto out;
1078 }
1079 interruptible_sleep_on(&(dev->info_waitq));
1080 }
1081 p = isdn_statstr();
1082 file->private_data = NULL;
1083 if ((len = strlen(p)) <= count) {
1084 if (copy_to_user(buf, p, len)) {
1085 retval = -EFAULT;
1086 goto out;
1087 }
1088 *off += len;
1089 retval = len;
1090 goto out;
1091 }
1092 retval = 0;
1093 goto out;
1094 }
1095 if (!dev->drivers) {
1096 retval = -ENODEV;
1097 goto out;
1098 }
1099 if (minor <= ISDN_MINOR_BMAX) {
1100 printk(KERN_WARNING "isdn_read minor %d obsolete!\n", minor);
1101 drvidx = isdn_minor2drv(minor);
1102 if (drvidx < 0) {
1103 retval = -ENODEV;
1104 goto out;
1105 }
1106 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1107 retval = -ENODEV;
1108 goto out;
1109 }
1110 chidx = isdn_minor2chan(minor);
1111 if (!(p = kmalloc(count, GFP_KERNEL))) {
1112 retval = -ENOMEM;
1113 goto out;
1114 }
1115 len = isdn_readbchan(drvidx, chidx, p, NULL, count,
1116 &dev->drv[drvidx]->rcv_waitq[chidx]);
1117 *off += len;
1118 if (copy_to_user(buf,p,len))
1119 len = -EFAULT;
1120 kfree(p);
1121 retval = len;
1122 goto out;
1123 }
1124 if (minor <= ISDN_MINOR_CTRLMAX) {
1125 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1126 if (drvidx < 0) {
1127 retval = -ENODEV;
1128 goto out;
1129 }
1130 if (!dev->drv[drvidx]->stavail) {
1131 if (file->f_flags & O_NONBLOCK) {
1132 retval = -EAGAIN;
1133 goto out;
1134 }
1135 interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq));
1136 }
1137 if (dev->drv[drvidx]->interface->readstat) {
1138 if (count > dev->drv[drvidx]->stavail)
1139 count = dev->drv[drvidx]->stavail;
1140 len = dev->drv[drvidx]->interface->readstat(buf, count,
1141 drvidx, isdn_minor2chan(minor - ISDN_MINOR_CTRL));
1142 if (len < 0) {
1143 retval = len;
1144 goto out;
1145 }
1146 } else {
1147 len = 0;
1148 }
1149 if (len)
1150 dev->drv[drvidx]->stavail -= len;
1151 else
1152 dev->drv[drvidx]->stavail = 0;
1153 *off += len;
1154 retval = len;
1155 goto out;
1156 }
1157 #ifdef CONFIG_ISDN_PPP
1158 if (minor <= ISDN_MINOR_PPPMAX) {
1159 retval = isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count);
1160 goto out;
1161 }
1162 #endif
1163 retval = -ENODEV;
1164 out:
1165 unlock_kernel();
1166 return retval;
1167 }
1168
1169 static ssize_t
1170 isdn_write(struct file *file, const char __user *buf, size_t count, loff_t * off)
1171 {
1172 uint minor = iminor(file->f_path.dentry->d_inode);
1173 int drvidx;
1174 int chidx;
1175 int retval;
1176
1177 if (minor == ISDN_MINOR_STATUS)
1178 return -EPERM;
1179 if (!dev->drivers)
1180 return -ENODEV;
1181
1182 lock_kernel();
1183 if (minor <= ISDN_MINOR_BMAX) {
1184 printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor);
1185 drvidx = isdn_minor2drv(minor);
1186 if (drvidx < 0) {
1187 retval = -ENODEV;
1188 goto out;
1189 }
1190 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1191 retval = -ENODEV;
1192 goto out;
1193 }
1194 chidx = isdn_minor2chan(minor);
1195 while ((retval = isdn_writebuf_stub(drvidx, chidx, buf, count)) == 0)
1196 interruptible_sleep_on(&dev->drv[drvidx]->snd_waitq[chidx]);
1197 goto out;
1198 }
1199 if (minor <= ISDN_MINOR_CTRLMAX) {
1200 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1201 if (drvidx < 0) {
1202 retval = -ENODEV;
1203 goto out;
1204 }
1205 /*
1206 * We want to use the isdnctrl device to load the firmware
1207 *
1208 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1209 return -ENODEV;
1210 */
1211 if (dev->drv[drvidx]->interface->writecmd)
1212 retval = dev->drv[drvidx]->interface->
1213 writecmd(buf, count, drvidx,
1214 isdn_minor2chan(minor - ISDN_MINOR_CTRL));
1215 else
1216 retval = count;
1217 goto out;
1218 }
1219 #ifdef CONFIG_ISDN_PPP
1220 if (minor <= ISDN_MINOR_PPPMAX) {
1221 retval = isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count);
1222 goto out;
1223 }
1224 #endif
1225 retval = -ENODEV;
1226 out:
1227 unlock_kernel();
1228 return retval;
1229 }
1230
1231 static unsigned int
1232 isdn_poll(struct file *file, poll_table * wait)
1233 {
1234 unsigned int mask = 0;
1235 unsigned int minor = iminor(file->f_path.dentry->d_inode);
1236 int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1237
1238 lock_kernel();
1239 if (minor == ISDN_MINOR_STATUS) {
1240 poll_wait(file, &(dev->info_waitq), wait);
1241 /* mask = POLLOUT | POLLWRNORM; */
1242 if (file->private_data) {
1243 mask |= POLLIN | POLLRDNORM;
1244 }
1245 goto out;
1246 }
1247 if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
1248 if (drvidx < 0) {
1249 /* driver deregistered while file open */
1250 mask = POLLHUP;
1251 goto out;
1252 }
1253 poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
1254 mask = POLLOUT | POLLWRNORM;
1255 if (dev->drv[drvidx]->stavail) {
1256 mask |= POLLIN | POLLRDNORM;
1257 }
1258 goto out;
1259 }
1260 #ifdef CONFIG_ISDN_PPP
1261 if (minor <= ISDN_MINOR_PPPMAX) {
1262 mask = isdn_ppp_poll(file, wait);
1263 goto out;
1264 }
1265 #endif
1266 mask = POLLERR;
1267 out:
1268 unlock_kernel();
1269 return mask;
1270 }
1271
1272
1273 static int
1274 isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
1275 {
1276 uint minor = iminor(inode);
1277 isdn_ctrl c;
1278 int drvidx;
1279 int chidx;
1280 int ret;
1281 int i;
1282 char __user *p;
1283 char *s;
1284 union iocpar {
1285 char name[10];
1286 char bname[22];
1287 isdn_ioctl_struct iocts;
1288 isdn_net_ioctl_phone phone;
1289 isdn_net_ioctl_cfg cfg;
1290 } iocpar;
1291 void __user *argp = (void __user *)arg;
1292
1293 #define name iocpar.name
1294 #define bname iocpar.bname
1295 #define iocts iocpar.iocts
1296 #define phone iocpar.phone
1297 #define cfg iocpar.cfg
1298
1299 if (minor == ISDN_MINOR_STATUS) {
1300 switch (cmd) {
1301 case IIOCGETDVR:
1302 return (TTY_DV +
1303 (NET_DV << 8) +
1304 (INF_DV << 16));
1305 case IIOCGETCPS:
1306 if (arg) {
1307 ulong __user *p = argp;
1308 int i;
1309 if (!access_ok(VERIFY_WRITE, p,
1310 sizeof(ulong) * ISDN_MAX_CHANNELS * 2))
1311 return -EFAULT;
1312 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1313 put_user(dev->ibytes[i], p++);
1314 put_user(dev->obytes[i], p++);
1315 }
1316 return 0;
1317 } else
1318 return -EINVAL;
1319 break;
1320 #ifdef CONFIG_NETDEVICES
1321 case IIOCNETGPN:
1322 /* Get peer phone number of a connected
1323 * isdn network interface */
1324 if (arg) {
1325 if (copy_from_user(&phone, argp, sizeof(phone)))
1326 return -EFAULT;
1327 return isdn_net_getpeer(&phone, argp);
1328 } else
1329 return -EINVAL;
1330 #endif
1331 default:
1332 return -EINVAL;
1333 }
1334 }
1335 if (!dev->drivers)
1336 return -ENODEV;
1337 if (minor <= ISDN_MINOR_BMAX) {
1338 drvidx = isdn_minor2drv(minor);
1339 if (drvidx < 0)
1340 return -ENODEV;
1341 chidx = isdn_minor2chan(minor);
1342 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1343 return -ENODEV;
1344 return 0;
1345 }
1346 if (minor <= ISDN_MINOR_CTRLMAX) {
1347 /*
1348 * isdn net devices manage lots of configuration variables as linked lists.
1349 * Those lists must only be manipulated from user space. Some of the ioctl's
1350 * service routines access user space and are not atomic. Therefore, ioctl's
1351 * manipulating the lists and ioctl's sleeping while accessing the lists
1352 * are serialized by means of a semaphore.
1353 */
1354 switch (cmd) {
1355 case IIOCNETDWRSET:
1356 printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
1357 return(-EINVAL);
1358 case IIOCNETLCR:
1359 printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
1360 return -ENODEV;
1361 #ifdef CONFIG_NETDEVICES
1362 case IIOCNETAIF:
1363 /* Add a network-interface */
1364 if (arg) {
1365 if (copy_from_user(name, argp, sizeof(name)))
1366 return -EFAULT;
1367 s = name;
1368 } else {
1369 s = NULL;
1370 }
1371 ret = mutex_lock_interruptible(&dev->mtx);
1372 if( ret ) return ret;
1373 if ((s = isdn_net_new(s, NULL))) {
1374 if (copy_to_user(argp, s, strlen(s) + 1)){
1375 ret = -EFAULT;
1376 } else {
1377 ret = 0;
1378 }
1379 } else
1380 ret = -ENODEV;
1381 mutex_unlock(&dev->mtx);
1382 return ret;
1383 case IIOCNETASL:
1384 /* Add a slave to a network-interface */
1385 if (arg) {
1386 if (copy_from_user(bname, argp, sizeof(bname) - 1))
1387 return -EFAULT;
1388 } else
1389 return -EINVAL;
1390 ret = mutex_lock_interruptible(&dev->mtx);
1391 if( ret ) return ret;
1392 if ((s = isdn_net_newslave(bname))) {
1393 if (copy_to_user(argp, s, strlen(s) + 1)){
1394 ret = -EFAULT;
1395 } else {
1396 ret = 0;
1397 }
1398 } else
1399 ret = -ENODEV;
1400 mutex_unlock(&dev->mtx);
1401 return ret;
1402 case IIOCNETDIF:
1403 /* Delete a network-interface */
1404 if (arg) {
1405 if (copy_from_user(name, argp, sizeof(name)))
1406 return -EFAULT;
1407 ret = mutex_lock_interruptible(&dev->mtx);
1408 if( ret ) return ret;
1409 ret = isdn_net_rm(name);
1410 mutex_unlock(&dev->mtx);
1411 return ret;
1412 } else
1413 return -EINVAL;
1414 case IIOCNETSCF:
1415 /* Set configurable parameters of a network-interface */
1416 if (arg) {
1417 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1418 return -EFAULT;
1419 return isdn_net_setcfg(&cfg);
1420 } else
1421 return -EINVAL;
1422 case IIOCNETGCF:
1423 /* Get configurable parameters of a network-interface */
1424 if (arg) {
1425 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1426 return -EFAULT;
1427 if (!(ret = isdn_net_getcfg(&cfg))) {
1428 if (copy_to_user(argp, &cfg, sizeof(cfg)))
1429 return -EFAULT;
1430 }
1431 return ret;
1432 } else
1433 return -EINVAL;
1434 case IIOCNETANM:
1435 /* Add a phone-number to a network-interface */
1436 if (arg) {
1437 if (copy_from_user(&phone, argp, sizeof(phone)))
1438 return -EFAULT;
1439 ret = mutex_lock_interruptible(&dev->mtx);
1440 if( ret ) return ret;
1441 ret = isdn_net_addphone(&phone);
1442 mutex_unlock(&dev->mtx);
1443 return ret;
1444 } else
1445 return -EINVAL;
1446 case IIOCNETGNM:
1447 /* Get list of phone-numbers of a network-interface */
1448 if (arg) {
1449 if (copy_from_user(&phone, argp, sizeof(phone)))
1450 return -EFAULT;
1451 ret = mutex_lock_interruptible(&dev->mtx);
1452 if( ret ) return ret;
1453 ret = isdn_net_getphones(&phone, argp);
1454 mutex_unlock(&dev->mtx);
1455 return ret;
1456 } else
1457 return -EINVAL;
1458 case IIOCNETDNM:
1459 /* Delete a phone-number of a network-interface */
1460 if (arg) {
1461 if (copy_from_user(&phone, argp, sizeof(phone)))
1462 return -EFAULT;
1463 ret = mutex_lock_interruptible(&dev->mtx);
1464 if( ret ) return ret;
1465 ret = isdn_net_delphone(&phone);
1466 mutex_unlock(&dev->mtx);
1467 return ret;
1468 } else
1469 return -EINVAL;
1470 case IIOCNETDIL:
1471 /* Force dialing of a network-interface */
1472 if (arg) {
1473 if (copy_from_user(name, argp, sizeof(name)))
1474 return -EFAULT;
1475 return isdn_net_force_dial(name);
1476 } else
1477 return -EINVAL;
1478 #ifdef CONFIG_ISDN_PPP
1479 case IIOCNETALN:
1480 if (!arg)
1481 return -EINVAL;
1482 if (copy_from_user(name, argp, sizeof(name)))
1483 return -EFAULT;
1484 return isdn_ppp_dial_slave(name);
1485 case IIOCNETDLN:
1486 if (!arg)
1487 return -EINVAL;
1488 if (copy_from_user(name, argp, sizeof(name)))
1489 return -EFAULT;
1490 return isdn_ppp_hangup_slave(name);
1491 #endif
1492 case IIOCNETHUP:
1493 /* Force hangup of a network-interface */
1494 if (!arg)
1495 return -EINVAL;
1496 if (copy_from_user(name, argp, sizeof(name)))
1497 return -EFAULT;
1498 return isdn_net_force_hangup(name);
1499 break;
1500 #endif /* CONFIG_NETDEVICES */
1501 case IIOCSETVER:
1502 dev->net_verbose = arg;
1503 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1504 return 0;
1505 case IIOCSETGST:
1506 if (arg)
1507 dev->global_flags |= ISDN_GLOBAL_STOPPED;
1508 else
1509 dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1510 printk(KERN_INFO "isdn: Global Mode %s\n",
1511 (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1512 return 0;
1513 case IIOCSETBRJ:
1514 drvidx = -1;
1515 if (arg) {
1516 int i;
1517 char *p;
1518 if (copy_from_user(&iocts, argp,
1519 sizeof(isdn_ioctl_struct)))
1520 return -EFAULT;
1521 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1522 if (strlen(iocts.drvid)) {
1523 if ((p = strchr(iocts.drvid, ',')))
1524 *p = 0;
1525 drvidx = -1;
1526 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1527 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1528 drvidx = i;
1529 break;
1530 }
1531 }
1532 }
1533 if (drvidx == -1)
1534 return -ENODEV;
1535 if (iocts.arg)
1536 dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
1537 else
1538 dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
1539 return 0;
1540 case IIOCSIGPRF:
1541 dev->profd = current;
1542 return 0;
1543 break;
1544 case IIOCGETPRF:
1545 /* Get all Modem-Profiles */
1546 if (arg) {
1547 char __user *p = argp;
1548 int i;
1549
1550 if (!access_ok(VERIFY_WRITE, argp,
1551 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1552 * ISDN_MAX_CHANNELS))
1553 return -EFAULT;
1554
1555 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1556 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1557 ISDN_MODEM_NUMREG))
1558 return -EFAULT;
1559 p += ISDN_MODEM_NUMREG;
1560 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1561 return -EFAULT;
1562 p += ISDN_MSNLEN;
1563 if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
1564 return -EFAULT;
1565 p += ISDN_LMSNLEN;
1566 }
1567 return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
1568 } else
1569 return -EINVAL;
1570 break;
1571 case IIOCSETPRF:
1572 /* Set all Modem-Profiles */
1573 if (arg) {
1574 char __user *p = argp;
1575 int i;
1576
1577 if (!access_ok(VERIFY_READ, argp,
1578 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1579 * ISDN_MAX_CHANNELS))
1580 return -EFAULT;
1581
1582 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1583 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1584 ISDN_MODEM_NUMREG))
1585 return -EFAULT;
1586 p += ISDN_MODEM_NUMREG;
1587 if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
1588 return -EFAULT;
1589 p += ISDN_LMSNLEN;
1590 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1591 return -EFAULT;
1592 p += ISDN_MSNLEN;
1593 }
1594 return 0;
1595 } else
1596 return -EINVAL;
1597 break;
1598 case IIOCSETMAP:
1599 case IIOCGETMAP:
1600 /* Set/Get MSN->EAZ-Mapping for a driver */
1601 if (arg) {
1602
1603 if (copy_from_user(&iocts, argp,
1604 sizeof(isdn_ioctl_struct)))
1605 return -EFAULT;
1606 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1607 if (strlen(iocts.drvid)) {
1608 drvidx = -1;
1609 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1610 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1611 drvidx = i;
1612 break;
1613 }
1614 } else
1615 drvidx = 0;
1616 if (drvidx == -1)
1617 return -ENODEV;
1618 if (cmd == IIOCSETMAP) {
1619 int loop = 1;
1620
1621 p = (char __user *) iocts.arg;
1622 i = 0;
1623 while (loop) {
1624 int j = 0;
1625
1626 while (1) {
1627 if (!access_ok(VERIFY_READ, p, 1))
1628 return -EFAULT;
1629 get_user(bname[j], p++);
1630 switch (bname[j]) {
1631 case '\0':
1632 loop = 0;
1633 /* Fall through */
1634 case ',':
1635 bname[j] = '\0';
1636 strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
1637 j = ISDN_MSNLEN;
1638 break;
1639 default:
1640 j++;
1641 }
1642 if (j >= ISDN_MSNLEN)
1643 break;
1644 }
1645 if (++i > 9)
1646 break;
1647 }
1648 } else {
1649 p = (char __user *) iocts.arg;
1650 for (i = 0; i < 10; i++) {
1651 snprintf(bname, sizeof(bname), "%s%s",
1652 strlen(dev->drv[drvidx]->msn2eaz[i]) ?
1653 dev->drv[drvidx]->msn2eaz[i] : "_",
1654 (i < 9) ? "," : "\0");
1655 if (copy_to_user(p, bname, strlen(bname) + 1))
1656 return -EFAULT;
1657 p += strlen(bname);
1658 }
1659 }
1660 return 0;
1661 } else
1662 return -EINVAL;
1663 case IIOCDBGVAR:
1664 if (arg) {
1665 if (copy_to_user(argp, &dev, sizeof(ulong)))
1666 return -EFAULT;
1667 return 0;
1668 } else
1669 return -EINVAL;
1670 break;
1671 default:
1672 if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
1673 cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
1674 else
1675 return -EINVAL;
1676 if (arg) {
1677 int i;
1678 char *p;
1679 if (copy_from_user(&iocts, argp, sizeof(isdn_ioctl_struct)))
1680 return -EFAULT;
1681 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1682 if (strlen(iocts.drvid)) {
1683 if ((p = strchr(iocts.drvid, ',')))
1684 *p = 0;
1685 drvidx = -1;
1686 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1687 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1688 drvidx = i;
1689 break;
1690 }
1691 } else
1692 drvidx = 0;
1693 if (drvidx == -1)
1694 return -ENODEV;
1695 if (!access_ok(VERIFY_WRITE, argp,
1696 sizeof(isdn_ioctl_struct)))
1697 return -EFAULT;
1698 c.driver = drvidx;
1699 c.command = ISDN_CMD_IOCTL;
1700 c.arg = cmd;
1701 memcpy(c.parm.num, &iocts.arg, sizeof(ulong));
1702 ret = isdn_command(&c);
1703 memcpy(&iocts.arg, c.parm.num, sizeof(ulong));
1704 if (copy_to_user(argp, &iocts, sizeof(isdn_ioctl_struct)))
1705 return -EFAULT;
1706 return ret;
1707 } else
1708 return -EINVAL;
1709 }
1710 }
1711 #ifdef CONFIG_ISDN_PPP
1712 if (minor <= ISDN_MINOR_PPPMAX)
1713 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1714 #endif
1715 return -ENODEV;
1716
1717 #undef name
1718 #undef bname
1719 #undef iocts
1720 #undef phone
1721 #undef cfg
1722 }
1723
1724 /*
1725 * Open the device code.
1726 */
1727 static int
1728 isdn_open(struct inode *ino, struct file *filep)
1729 {
1730 uint minor = iminor(ino);
1731 int drvidx;
1732 int chidx;
1733 int retval = -ENODEV;
1734
1735 lock_kernel();
1736 if (minor == ISDN_MINOR_STATUS) {
1737 infostruct *p;
1738
1739 if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1740 p->next = (char *) dev->infochain;
1741 p->private = (char *) &(filep->private_data);
1742 dev->infochain = p;
1743 /* At opening we allow a single update */
1744 filep->private_data = (char *) 1;
1745 retval = 0;
1746 goto out;
1747 } else {
1748 retval = -ENOMEM;
1749 goto out;
1750 }
1751 }
1752 if (!dev->channels)
1753 goto out;
1754 if (minor <= ISDN_MINOR_BMAX) {
1755 printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
1756 drvidx = isdn_minor2drv(minor);
1757 if (drvidx < 0)
1758 goto out;
1759 chidx = isdn_minor2chan(minor);
1760 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1761 goto out;
1762 if (!(dev->drv[drvidx]->online & (1 << chidx)))
1763 goto out;
1764 isdn_lock_drivers();
1765 retval = 0;
1766 goto out;
1767 }
1768 if (minor <= ISDN_MINOR_CTRLMAX) {
1769 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1770 if (drvidx < 0)
1771 goto out;
1772 isdn_lock_drivers();
1773 retval = 0;
1774 goto out;
1775 }
1776 #ifdef CONFIG_ISDN_PPP
1777 if (minor <= ISDN_MINOR_PPPMAX) {
1778 retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
1779 if (retval == 0)
1780 isdn_lock_drivers();
1781 goto out;
1782 }
1783 #endif
1784 out:
1785 nonseekable_open(ino, filep);
1786 unlock_kernel();
1787 return retval;
1788 }
1789
1790 static int
1791 isdn_close(struct inode *ino, struct file *filep)
1792 {
1793 uint minor = iminor(ino);
1794
1795 lock_kernel();
1796 if (minor == ISDN_MINOR_STATUS) {
1797 infostruct *p = dev->infochain;
1798 infostruct *q = NULL;
1799
1800 while (p) {
1801 if (p->private == (char *) &(filep->private_data)) {
1802 if (q)
1803 q->next = p->next;
1804 else
1805 dev->infochain = (infostruct *) (p->next);
1806 kfree(p);
1807 goto out;
1808 }
1809 q = p;
1810 p = (infostruct *) (p->next);
1811 }
1812 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1813 goto out;
1814 }
1815 isdn_unlock_drivers();
1816 if (minor <= ISDN_MINOR_BMAX)
1817 goto out;
1818 if (minor <= ISDN_MINOR_CTRLMAX) {
1819 if (dev->profd == current)
1820 dev->profd = NULL;
1821 goto out;
1822 }
1823 #ifdef CONFIG_ISDN_PPP
1824 if (minor <= ISDN_MINOR_PPPMAX)
1825 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1826 #endif
1827
1828 out:
1829 unlock_kernel();
1830 return 0;
1831 }
1832
1833 static const struct file_operations isdn_fops =
1834 {
1835 .owner = THIS_MODULE,
1836 .llseek = no_llseek,
1837 .read = isdn_read,
1838 .write = isdn_write,
1839 .poll = isdn_poll,
1840 .ioctl = isdn_ioctl,
1841 .open = isdn_open,
1842 .release = isdn_close,
1843 };
1844
1845 char *
1846 isdn_map_eaz2msn(char *msn, int di)
1847 {
1848 isdn_driver_t *this = dev->drv[di];
1849 int i;
1850
1851 if (strlen(msn) == 1) {
1852 i = msn[0] - '0';
1853 if ((i >= 0) && (i <= 9))
1854 if (strlen(this->msn2eaz[i]))
1855 return (this->msn2eaz[i]);
1856 }
1857 return (msn);
1858 }
1859
1860 /*
1861 * Find an unused ISDN-channel, whose feature-flags match the
1862 * given L2- and L3-protocols.
1863 */
1864 #define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038))
1865
1866 /*
1867 * This function must be called with holding the dev->lock.
1868 */
1869 int
1870 isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1871 ,int pre_chan, char *msn)
1872 {
1873 int i;
1874 ulong features;
1875 ulong vfeatures;
1876
1877 features = ((1 << l2_proto) | (0x10000 << l3_proto));
1878 vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1879 ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038));
1880 /* If Layer-2 protocol is V.110, accept drivers with
1881 * transparent feature even if these don't support V.110
1882 * because we can emulate this in linklevel.
1883 */
1884 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1885 if (USG_NONE(dev->usage[i]) &&
1886 (dev->drvmap[i] != -1)) {
1887 int d = dev->drvmap[i];
1888 if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1889 ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1890 continue;
1891 if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
1892 continue;
1893 if (dev->usage[i] & ISDN_USAGE_DISABLED)
1894 continue; /* usage not allowed */
1895 if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
1896 if (((dev->drv[d]->interface->features & features) == features) ||
1897 (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1898 (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1899 if ((pre_dev < 0) || (pre_chan < 0)) {
1900 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1901 dev->usage[i] |= usage;
1902 isdn_info_update();
1903 return i;
1904 } else {
1905 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1906 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1907 dev->usage[i] |= usage;
1908 isdn_info_update();
1909 return i;
1910 }
1911 }
1912 }
1913 }
1914 }
1915 return -1;
1916 }
1917
1918 /*
1919 * Set state of ISDN-channel to 'unused'
1920 */
1921 void
1922 isdn_free_channel(int di, int ch, int usage)
1923 {
1924 int i;
1925
1926 if ((di < 0) || (ch < 0)) {
1927 printk(KERN_WARNING "%s: called with invalid drv(%d) or channel(%d)\n",
1928 __func__, di, ch);
1929 return;
1930 }
1931 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1932 if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
1933 (dev->drvmap[i] == di) &&
1934 (dev->chanmap[i] == ch)) {
1935 dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1936 strcpy(dev->num[i], "???");
1937 dev->ibytes[i] = 0;
1938 dev->obytes[i] = 0;
1939 // 20.10.99 JIM, try to reinitialize v110 !
1940 dev->v110emu[i] = 0;
1941 atomic_set(&(dev->v110use[i]), 0);
1942 isdn_v110_close(dev->v110[i]);
1943 dev->v110[i] = NULL;
1944 // 20.10.99 JIM, try to reinitialize v110 !
1945 isdn_info_update();
1946 if (dev->drv[di])
1947 skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
1948 }
1949 }
1950
1951 /*
1952 * Cancel Exclusive-Flag for ISDN-channel
1953 */
1954 void
1955 isdn_unexclusive_channel(int di, int ch)
1956 {
1957 int i;
1958
1959 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1960 if ((dev->drvmap[i] == di) &&
1961 (dev->chanmap[i] == ch)) {
1962 dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1963 isdn_info_update();
1964 return;
1965 }
1966 }
1967
1968 /*
1969 * writebuf replacement for SKB_ABLE drivers
1970 */
1971 static int
1972 isdn_writebuf_stub(int drvidx, int chan, const u_char __user * buf, int len)
1973 {
1974 int ret;
1975 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1976 struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1977
1978 if (!skb)
1979 return -ENOMEM;
1980 skb_reserve(skb, hl);
1981 if (copy_from_user(skb_put(skb, len), buf, len)) {
1982 dev_kfree_skb(skb);
1983 return -EFAULT;
1984 }
1985 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
1986 if (ret <= 0)
1987 dev_kfree_skb(skb);
1988 if (ret > 0)
1989 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
1990 return ret;
1991 }
1992
1993 /*
1994 * Return: length of data on success, -ERRcode on failure.
1995 */
1996 int
1997 isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
1998 {
1999 int ret;
2000 struct sk_buff *nskb = NULL;
2001 int v110_ret = skb->len;
2002 int idx = isdn_dc2minor(drvidx, chan);
2003
2004 if (dev->v110[idx]) {
2005 atomic_inc(&dev->v110use[idx]);
2006 nskb = isdn_v110_encode(dev->v110[idx], skb);
2007 atomic_dec(&dev->v110use[idx]);
2008 if (!nskb)
2009 return 0;
2010 v110_ret = *((int *)nskb->data);
2011 skb_pull(nskb, sizeof(int));
2012 if (!nskb->len) {
2013 dev_kfree_skb(nskb);
2014 return v110_ret;
2015 }
2016 /* V.110 must always be acknowledged */
2017 ack = 1;
2018 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
2019 } else {
2020 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
2021
2022 if( skb_headroom(skb) < hl ){
2023 /*
2024 * This should only occur when new HL driver with
2025 * increased hl_hdrlen was loaded after netdevice
2026 * was created and connected to the new driver.
2027 *
2028 * The V.110 branch (re-allocates on its own) does
2029 * not need this
2030 */
2031 struct sk_buff * skb_tmp;
2032
2033 skb_tmp = skb_realloc_headroom(skb, hl);
2034 printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
2035 if (!skb_tmp) return -ENOMEM; /* 0 better? */
2036 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
2037 if( ret > 0 ){
2038 dev_kfree_skb(skb);
2039 } else {
2040 dev_kfree_skb(skb_tmp);
2041 }
2042 } else {
2043 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
2044 }
2045 }
2046 if (ret > 0) {
2047 dev->obytes[idx] += ret;
2048 if (dev->v110[idx]) {
2049 atomic_inc(&dev->v110use[idx]);
2050 dev->v110[idx]->skbuser++;
2051 atomic_dec(&dev->v110use[idx]);
2052 /* For V.110 return unencoded data length */
2053 ret = v110_ret;
2054 /* if the complete frame was send we free the skb;
2055 if not upper function will requeue the skb */
2056 if (ret == skb->len)
2057 dev_kfree_skb(skb);
2058 }
2059 } else
2060 if (dev->v110[idx])
2061 dev_kfree_skb(nskb);
2062 return ret;
2063 }
2064
2065 static int
2066 isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
2067 {
2068 int j, k, m;
2069
2070 init_waitqueue_head(&d->st_waitq);
2071 if (d->flags & DRV_FLAG_RUNNING)
2072 return -1;
2073 if (n < 1) return 0;
2074
2075 m = (adding) ? d->channels + n : n;
2076
2077 if (dev->channels + n > ISDN_MAX_CHANNELS) {
2078 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
2079 ISDN_MAX_CHANNELS);
2080 return -1;
2081 }
2082
2083 if ((adding) && (d->rcverr))
2084 kfree(d->rcverr);
2085 if (!(d->rcverr = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2086 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
2087 return -1;
2088 }
2089
2090 if ((adding) && (d->rcvcount))
2091 kfree(d->rcvcount);
2092 if (!(d->rcvcount = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2093 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
2094 if (!adding)
2095 kfree(d->rcverr);
2096 return -1;
2097 }
2098
2099 if ((adding) && (d->rpqueue)) {
2100 for (j = 0; j < d->channels; j++)
2101 skb_queue_purge(&d->rpqueue[j]);
2102 kfree(d->rpqueue);
2103 }
2104 if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_ATOMIC))) {
2105 printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
2106 if (!adding) {
2107 kfree(d->rcvcount);
2108 kfree(d->rcverr);
2109 }
2110 return -1;
2111 }
2112 for (j = 0; j < m; j++) {
2113 skb_queue_head_init(&d->rpqueue[j]);
2114 }
2115
2116 if ((adding) && (d->rcv_waitq))
2117 kfree(d->rcv_waitq);
2118 d->rcv_waitq = kmalloc(sizeof(wait_queue_head_t) * 2 * m, GFP_ATOMIC);
2119 if (!d->rcv_waitq) {
2120 printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
2121 if (!adding) {
2122 kfree(d->rpqueue);
2123 kfree(d->rcvcount);
2124 kfree(d->rcverr);
2125 }
2126 return -1;
2127 }
2128 d->snd_waitq = d->rcv_waitq + m;
2129 for (j = 0; j < m; j++) {
2130 init_waitqueue_head(&d->rcv_waitq[j]);
2131 init_waitqueue_head(&d->snd_waitq[j]);
2132 }
2133
2134 dev->channels += n;
2135 for (j = d->channels; j < m; j++)
2136 for (k = 0; k < ISDN_MAX_CHANNELS; k++)
2137 if (dev->chanmap[k] < 0) {
2138 dev->chanmap[k] = j;
2139 dev->drvmap[k] = drvidx;
2140 break;
2141 }
2142 d->channels = m;
2143 return 0;
2144 }
2145
2146 /*
2147 * Low-level-driver registration
2148 */
2149
2150 static void
2151 set_global_features(void)
2152 {
2153 int drvidx;
2154
2155 dev->global_features = 0;
2156 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
2157 if (!dev->drv[drvidx])
2158 continue;
2159 if (dev->drv[drvidx]->interface)
2160 dev->global_features |= dev->drv[drvidx]->interface->features;
2161 }
2162 }
2163
2164 #ifdef CONFIG_ISDN_DIVERSION
2165
2166 static char *map_drvname(int di)
2167 {
2168 if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
2169 return(NULL);
2170 return(dev->drvid[di]); /* driver name */
2171 } /* map_drvname */
2172
2173 static int map_namedrv(char *id)
2174 { int i;
2175
2176 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2177 { if (!strcmp(dev->drvid[i],id))
2178 return(i);
2179 }
2180 return(-1);
2181 } /* map_namedrv */
2182
2183 int DIVERT_REG_NAME(isdn_divert_if *i_div)
2184 {
2185 if (i_div->if_magic != DIVERT_IF_MAGIC)
2186 return(DIVERT_VER_ERR);
2187 switch (i_div->cmd)
2188 {
2189 case DIVERT_CMD_REL:
2190 if (divert_if != i_div)
2191 return(DIVERT_REL_ERR);
2192 divert_if = NULL; /* free interface */
2193 return(DIVERT_NO_ERR);
2194
2195 case DIVERT_CMD_REG:
2196 if (divert_if)
2197 return(DIVERT_REG_ERR);
2198 i_div->ll_cmd = isdn_command; /* set command function */
2199 i_div->drv_to_name = map_drvname;
2200 i_div->name_to_drv = map_namedrv;
2201 divert_if = i_div; /* remember interface */
2202 return(DIVERT_NO_ERR);
2203
2204 default:
2205 return(DIVERT_CMD_ERR);
2206 }
2207 } /* DIVERT_REG_NAME */
2208
2209 EXPORT_SYMBOL(DIVERT_REG_NAME);
2210
2211 #endif /* CONFIG_ISDN_DIVERSION */
2212
2213
2214 EXPORT_SYMBOL(register_isdn);
2215 #ifdef CONFIG_ISDN_PPP
2216 EXPORT_SYMBOL(isdn_ppp_register_compressor);
2217 EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
2218 #endif
2219
2220 int
2221 register_isdn(isdn_if * i)
2222 {
2223 isdn_driver_t *d;
2224 int j;
2225 ulong flags;
2226 int drvidx;
2227
2228 if (dev->drivers >= ISDN_MAX_DRIVERS) {
2229 printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
2230 ISDN_MAX_DRIVERS);
2231 return 0;
2232 }
2233 if (!i->writebuf_skb) {
2234 printk(KERN_WARNING "register_isdn: No write routine given.\n");
2235 return 0;
2236 }
2237 if (!(d = kzalloc(sizeof(isdn_driver_t), GFP_KERNEL))) {
2238 printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
2239 return 0;
2240 }
2241
2242 d->maxbufsize = i->maxbufsize;
2243 d->pktcount = 0;
2244 d->stavail = 0;
2245 d->flags = DRV_FLAG_LOADED;
2246 d->online = 0;
2247 d->interface = i;
2248 d->channels = 0;
2249 spin_lock_irqsave(&dev->lock, flags);
2250 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2251 if (!dev->drv[drvidx])
2252 break;
2253 if (isdn_add_channels(d, drvidx, i->channels, 0)) {
2254 spin_unlock_irqrestore(&dev->lock, flags);
2255 kfree(d);
2256 return 0;
2257 }
2258 i->channels = drvidx;
2259 i->rcvcallb_skb = isdn_receive_skb_callback;
2260 i->statcallb = isdn_status_callback;
2261 if (!strlen(i->id))
2262 sprintf(i->id, "line%d", drvidx);
2263 for (j = 0; j < drvidx; j++)
2264 if (!strcmp(i->id, dev->drvid[j]))
2265 sprintf(i->id, "line%d", drvidx);
2266 dev->drv[drvidx] = d;
2267 strcpy(dev->drvid[drvidx], i->id);
2268 isdn_info_update();
2269 dev->drivers++;
2270 set_global_features();
2271 spin_unlock_irqrestore(&dev->lock, flags);
2272 return 1;
2273 }
2274
2275 /*
2276 *****************************************************************************
2277 * And now the modules code.
2278 *****************************************************************************
2279 */
2280
2281 static char *
2282 isdn_getrev(const char *revision)
2283 {
2284 char *rev;
2285 char *p;
2286
2287 if ((p = strchr(revision, ':'))) {
2288 rev = p + 2;
2289 p = strchr(rev, '$');
2290 *--p = 0;
2291 } else
2292 rev = "???";
2293 return rev;
2294 }
2295
2296 /*
2297 * Allocate and initialize all data, register modem-devices
2298 */
2299 static int __init isdn_init(void)
2300 {
2301 int i;
2302 char tmprev[50];
2303
2304 if (!(dev = vmalloc(sizeof(isdn_dev)))) {
2305 printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
2306 return -EIO;
2307 }
2308 memset((char *) dev, 0, sizeof(isdn_dev));
2309 init_timer(&dev->timer);
2310 dev->timer.function = isdn_timer_funct;
2311 spin_lock_init(&dev->lock);
2312 spin_lock_init(&dev->timerlock);
2313 #ifdef MODULE
2314 dev->owner = THIS_MODULE;
2315 #endif
2316 mutex_init(&dev->mtx);
2317 init_waitqueue_head(&dev->info_waitq);
2318 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2319 dev->drvmap[i] = -1;
2320 dev->chanmap[i] = -1;
2321 dev->m_idx[i] = -1;
2322 strcpy(dev->num[i], "???");
2323 init_waitqueue_head(&dev->mdm.info[i].open_wait);
2324 init_waitqueue_head(&dev->mdm.info[i].close_wait);
2325 }
2326 if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
2327 printk(KERN_WARNING "isdn: Could not register control devices\n");
2328 vfree(dev);
2329 return -EIO;
2330 }
2331 if ((isdn_tty_modem_init()) < 0) {
2332 printk(KERN_WARNING "isdn: Could not register tty devices\n");
2333 vfree(dev);
2334 unregister_chrdev(ISDN_MAJOR, "isdn");
2335 return -EIO;
2336 }
2337 #ifdef CONFIG_ISDN_PPP
2338 if (isdn_ppp_init() < 0) {
2339 printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
2340 isdn_tty_exit();
2341 unregister_chrdev(ISDN_MAJOR, "isdn");
2342 vfree(dev);
2343 return -EIO;
2344 }
2345 #endif /* CONFIG_ISDN_PPP */
2346
2347 strcpy(tmprev, isdn_revision);
2348 printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
2349 strcpy(tmprev, isdn_tty_revision);
2350 printk("%s/", isdn_getrev(tmprev));
2351 strcpy(tmprev, isdn_net_revision);
2352 printk("%s/", isdn_getrev(tmprev));
2353 strcpy(tmprev, isdn_ppp_revision);
2354 printk("%s/", isdn_getrev(tmprev));
2355 strcpy(tmprev, isdn_audio_revision);
2356 printk("%s/", isdn_getrev(tmprev));
2357 strcpy(tmprev, isdn_v110_revision);
2358 printk("%s", isdn_getrev(tmprev));
2359
2360 #ifdef MODULE
2361 printk(" loaded\n");
2362 #else
2363 printk("\n");
2364 #endif
2365 isdn_info_update();
2366 return 0;
2367 }
2368
2369 /*
2370 * Unload module
2371 */
2372 static void __exit isdn_exit(void)
2373 {
2374 #ifdef CONFIG_ISDN_PPP
2375 isdn_ppp_cleanup();
2376 #endif
2377 if (isdn_net_rmall() < 0) {
2378 printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
2379 return;
2380 }
2381 isdn_tty_exit();
2382 unregister_chrdev(ISDN_MAJOR, "isdn");
2383 del_timer(&dev->timer);
2384 /* call vfree with interrupts enabled, else it will hang */
2385 vfree(dev);
2386 printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
2387 }
2388
2389 module_init(isdn_init);
2390 module_exit(isdn_exit);