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[linux-rt-nao.git] / drivers / isdn / i4l / isdn_common.c
blob0421604983eaf6ae4a9c4ccf32cf79ee596e8cf6
1 /* $Id: isdn_common.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
2 *
3 * Linux ISDN subsystem, common used functions (linklevel).
4 *
5 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
6 * Copyright 1995,96 Thinking Objects Software GmbH Wuerzburg
7 * Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
8 *
9 * This software may be used and distributed according to the terms
10 * of the GNU General Public License, incorporated herein by reference.
11 *
12 */
13
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/poll.h>
17 #include <linux/vmalloc.h>
18 #include <linux/isdn.h>
19 #include <linux/smp_lock.h>
20 #include "isdn_common.h"
21 #include "isdn_tty.h"
22 #include "isdn_net.h"
23 #include "isdn_ppp.h"
24 #ifdef CONFIG_ISDN_AUDIO
25 #include "isdn_audio.h"
26 #endif
27 #ifdef CONFIG_ISDN_DIVERSION_MODULE
28 #define CONFIG_ISDN_DIVERSION
29 #endif
30 #ifdef CONFIG_ISDN_DIVERSION
31 #include <linux/isdn_divertif.h>
32 #endif /* CONFIG_ISDN_DIVERSION */
33 #include "isdn_v110.h"
34
35 /* Debugflags */
36 #undef ISDN_DEBUG_STATCALLB
37
38 MODULE_DESCRIPTION("ISDN4Linux: link layer");
39 MODULE_AUTHOR("Fritz Elfert");
40 MODULE_LICENSE("GPL");
41
42 isdn_dev *dev;
43
44 static char *isdn_revision = "$Revision: 1.1.2.3 $";
45
46 extern char *isdn_net_revision;
47 extern char *isdn_tty_revision;
48 #ifdef CONFIG_ISDN_PPP
49 extern char *isdn_ppp_revision;
50 #else
51 static char *isdn_ppp_revision = ": none $";
52 #endif
53 #ifdef CONFIG_ISDN_AUDIO
54 extern char *isdn_audio_revision;
55 #else
56 static char *isdn_audio_revision = ": none $";
57 #endif
58 extern char *isdn_v110_revision;
59
60 #ifdef CONFIG_ISDN_DIVERSION
61 static isdn_divert_if *divert_if; /* = NULL */
62 #endif /* CONFIG_ISDN_DIVERSION */
63
64
65 static int isdn_writebuf_stub(int, int, const u_char __user *, int);
66 static void set_global_features(void);
67 static int isdn_wildmat(char *s, char *p);
68 static int isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding);
69
70 static inline void
71 isdn_lock_driver(isdn_driver_t *drv)
72 {
73 try_module_get(drv->interface->owner);
74 drv->locks++;
75 }
76
77 void
78 isdn_lock_drivers(void)
79 {
80 int i;
81
82 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
83 if (!dev->drv[i])
84 continue;
85 isdn_lock_driver(dev->drv[i]);
86 }
87 }
88
89 static inline void
90 isdn_unlock_driver(isdn_driver_t *drv)
91 {
92 if (drv->locks > 0) {
93 drv->locks--;
94 module_put(drv->interface->owner);
95 }
96 }
97
98 void
99 isdn_unlock_drivers(void)
100 {
101 int i;
102
103 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
104 if (!dev->drv[i])
105 continue;
106 isdn_unlock_driver(dev->drv[i]);
107 }
108 }
109
110 #if defined(ISDN_DEBUG_NET_DUMP) || defined(ISDN_DEBUG_MODEM_DUMP)
111 void
112 isdn_dumppkt(char *s, u_char * p, int len, int dumplen)
113 {
114 int dumpc;
115
116 printk(KERN_DEBUG "%s(%d) ", s, len);
117 for (dumpc = 0; (dumpc < dumplen) && (len); len--, dumpc++)
118 printk(" %02x", *p++);
119 printk("\n");
120 }
121 #endif
122
123 /*
124 * I picked the pattern-matching-functions from an old GNU-tar version (1.10)
125 * It was originally written and put to PD by rs@mirror.TMC.COM (Rich Salz)
126 */
127 static int
128 isdn_star(char *s, char *p)
129 {
130 while (isdn_wildmat(s, p)) {
131 if (*++s == '\0')
132 return (2);
133 }
134 return (0);
135 }
136
137 /*
138 * Shell-type Pattern-matching for incoming caller-Ids
139 * This function gets a string in s and checks, if it matches the pattern
140 * given in p.
141 *
142 * Return:
143 * 0 = match.
144 * 1 = no match.
145 * 2 = no match. Would eventually match, if s would be longer.
146 *
147 * Possible Patterns:
148 *
149 * '?' matches one character
150 * '*' matches zero or more characters
151 * [xyz] matches the set of characters in brackets.
152 * [^xyz] matches any single character not in the set of characters
153 */
154
155 static int
156 isdn_wildmat(char *s, char *p)
157 {
158 register int last;
159 register int matched;
160 register int reverse;
161 register int nostar = 1;
162
163 if (!(*s) && !(*p))
164 return(1);
165 for (; *p; s++, p++)
166 switch (*p) {
167 case '\\':
168 /*
169 * Literal match with following character,
170 * fall through.
171 */
172 p++;
173 default:
174 if (*s != *p)
175 return (*s == '\0')?2:1;
176 continue;
177 case '?':
178 /* Match anything. */
179 if (*s == '\0')
180 return (2);
181 continue;
182 case '*':
183 nostar = 0;
184 /* Trailing star matches everything. */
185 return (*++p ? isdn_star(s, p) : 0);
186 case '[':
187 /* [^....] means inverse character class. */
188 if ((reverse = (p[1] == '^')))
189 p++;
190 for (last = 0, matched = 0; *++p && (*p != ']'); last = *p)
191 /* This next line requires a good C compiler. */
192 if (*p == '-' ? *s <= *++p && *s >= last : *s == *p)
193 matched = 1;
194 if (matched == reverse)
195 return (1);
196 continue;
197 }
198 return (*s == '\0')?0:nostar;
199 }
200
201 int isdn_msncmp( const char * msn1, const char * msn2 )
202 {
203 char TmpMsn1[ ISDN_MSNLEN ];
204 char TmpMsn2[ ISDN_MSNLEN ];
205 char *p;
206
207 for ( p = TmpMsn1; *msn1 && *msn1 != ':'; ) // Strip off a SPID
208 *p++ = *msn1++;
209 *p = '\0';
210
211 for ( p = TmpMsn2; *msn2 && *msn2 != ':'; ) // Strip off a SPID
212 *p++ = *msn2++;
213 *p = '\0';
214
215 return isdn_wildmat( TmpMsn1, TmpMsn2 );
216 }
217
218 int
219 isdn_dc2minor(int di, int ch)
220 {
221 int i;
222 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
223 if (dev->chanmap[i] == ch && dev->drvmap[i] == di)
224 return i;
225 return -1;
226 }
227
228 static int isdn_timer_cnt1 = 0;
229 static int isdn_timer_cnt2 = 0;
230 static int isdn_timer_cnt3 = 0;
231
232 static void
233 isdn_timer_funct(ulong dummy)
234 {
235 int tf = dev->tflags;
236 if (tf & ISDN_TIMER_FAST) {
237 if (tf & ISDN_TIMER_MODEMREAD)
238 isdn_tty_readmodem();
239 if (tf & ISDN_TIMER_MODEMPLUS)
240 isdn_tty_modem_escape();
241 if (tf & ISDN_TIMER_MODEMXMIT)
242 isdn_tty_modem_xmit();
243 }
244 if (tf & ISDN_TIMER_SLOW) {
245 if (++isdn_timer_cnt1 >= ISDN_TIMER_02SEC) {
246 isdn_timer_cnt1 = 0;
247 if (tf & ISDN_TIMER_NETDIAL)
248 isdn_net_dial();
249 }
250 if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) {
251 isdn_timer_cnt2 = 0;
252 if (tf & ISDN_TIMER_NETHANGUP)
253 isdn_net_autohup();
254 if (++isdn_timer_cnt3 >= ISDN_TIMER_RINGING) {
255 isdn_timer_cnt3 = 0;
256 if (tf & ISDN_TIMER_MODEMRING)
257 isdn_tty_modem_ring();
258 }
259 if (tf & ISDN_TIMER_CARRIER)
260 isdn_tty_carrier_timeout();
261 }
262 }
263 if (tf)
264 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
265 }
266
267 void
268 isdn_timer_ctrl(int tf, int onoff)
269 {
270 unsigned long flags;
271 int old_tflags;
272
273 spin_lock_irqsave(&dev->timerlock, flags);
274 if ((tf & ISDN_TIMER_SLOW) && (!(dev->tflags & ISDN_TIMER_SLOW))) {
275 /* If the slow-timer wasn't activated until now */
276 isdn_timer_cnt1 = 0;
277 isdn_timer_cnt2 = 0;
278 }
279 old_tflags = dev->tflags;
280 if (onoff)
281 dev->tflags |= tf;
282 else
283 dev->tflags &= ~tf;
284 if (dev->tflags && !old_tflags)
285 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
286 spin_unlock_irqrestore(&dev->timerlock, flags);
287 }
288
289 /*
290 * Receive a packet from B-Channel. (Called from low-level-module)
291 */
292 static void
293 isdn_receive_skb_callback(int di, int channel, struct sk_buff *skb)
294 {
295 int i;
296
297 if ((i = isdn_dc2minor(di, channel)) == -1) {
298 dev_kfree_skb(skb);
299 return;
300 }
301 /* Update statistics */
302 dev->ibytes[i] += skb->len;
303
304 /* First, try to deliver data to network-device */
305 if (isdn_net_rcv_skb(i, skb))
306 return;
307
308 /* V.110 handling
309 * makes sense for async streams only, so it is
310 * called after possible net-device delivery.
311 */
312 if (dev->v110[i]) {
313 atomic_inc(&dev->v110use[i]);
314 skb = isdn_v110_decode(dev->v110[i], skb);
315 atomic_dec(&dev->v110use[i]);
316 if (!skb)
317 return;
318 }
319
320 /* No network-device found, deliver to tty or raw-channel */
321 if (skb->len) {
322 if (isdn_tty_rcv_skb(i, di, channel, skb))
323 return;
324 wake_up_interruptible(&dev->drv[di]->rcv_waitq[channel]);
325 } else
326 dev_kfree_skb(skb);
327 }
328
329 /*
330 * Intercept command from Linklevel to Lowlevel.
331 * If layer 2 protocol is V.110 and this is not supported by current
332 * lowlevel-driver, use driver's transparent mode and handle V.110 in
333 * linklevel instead.
334 */
335 int
336 isdn_command(isdn_ctrl *cmd)
337 {
338 if (cmd->driver == -1) {
339 printk(KERN_WARNING "isdn_command command(%x) driver -1\n", cmd->command);
340 return(1);
341 }
342 if (!dev->drv[cmd->driver]) {
343 printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d] NULL\n",
344 cmd->command, cmd->driver);
345 return(1);
346 }
347 if (!dev->drv[cmd->driver]->interface) {
348 printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d]->interface NULL\n",
349 cmd->command, cmd->driver);
350 return(1);
351 }
352 if (cmd->command == ISDN_CMD_SETL2) {
353 int idx = isdn_dc2minor(cmd->driver, cmd->arg & 255);
354 unsigned long l2prot = (cmd->arg >> 8) & 255;
355 unsigned long features = (dev->drv[cmd->driver]->interface->features
356 >> ISDN_FEATURE_L2_SHIFT) &
357 ISDN_FEATURE_L2_MASK;
358 unsigned long l2_feature = (1 << l2prot);
359
360 switch (l2prot) {
361 case ISDN_PROTO_L2_V11096:
362 case ISDN_PROTO_L2_V11019:
363 case ISDN_PROTO_L2_V11038:
364 /* If V.110 requested, but not supported by
365 * HL-driver, set emulator-flag and change
366 * Layer-2 to transparent
367 */
368 if (!(features & l2_feature)) {
369 dev->v110emu[idx] = l2prot;
370 cmd->arg = (cmd->arg & 255) |
371 (ISDN_PROTO_L2_TRANS << 8);
372 } else
373 dev->v110emu[idx] = 0;
374 }
375 }
376 return dev->drv[cmd->driver]->interface->command(cmd);
377 }
378
379 void
380 isdn_all_eaz(int di, int ch)
381 {
382 isdn_ctrl cmd;
383
384 if (di < 0)
385 return;
386 cmd.driver = di;
387 cmd.arg = ch;
388 cmd.command = ISDN_CMD_SETEAZ;
389 cmd.parm.num[0] = '\0';
390 isdn_command(&cmd);
391 }
392
393 /*
394 * Begin of a CAPI like LL<->HL interface, currently used only for
395 * supplementary service (CAPI 2.0 part III)
396 */
397 #include <linux/isdn/capicmd.h>
398
399 static int
400 isdn_capi_rec_hl_msg(capi_msg *cm) {
401
402 int di;
403 int ch;
404
405 di = (cm->adr.Controller & 0x7f) -1;
406 ch = isdn_dc2minor(di, (cm->adr.Controller>>8)& 0x7f);
407 switch(cm->Command) {
408 case CAPI_FACILITY:
409 /* in the moment only handled in tty */
410 return(isdn_tty_capi_facility(cm));
411 default:
412 return(-1);
413 }
414 }
415
416 static int
417 isdn_status_callback(isdn_ctrl * c)
418 {
419 int di;
420 u_long flags;
421 int i;
422 int r;
423 int retval = 0;
424 isdn_ctrl cmd;
425 isdn_net_dev *p;
426
427 di = c->driver;
428 i = isdn_dc2minor(di, c->arg);
429 switch (c->command) {
430 case ISDN_STAT_BSENT:
431 if (i < 0)
432 return -1;
433 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
434 return 0;
435 if (isdn_net_stat_callback(i, c))
436 return 0;
437 if (isdn_v110_stat_callback(i, c))
438 return 0;
439 if (isdn_tty_stat_callback(i, c))
440 return 0;
441 wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]);
442 break;
443 case ISDN_STAT_STAVAIL:
444 dev->drv[di]->stavail += c->arg;
445 wake_up_interruptible(&dev->drv[di]->st_waitq);
446 break;
447 case ISDN_STAT_RUN:
448 dev->drv[di]->flags |= DRV_FLAG_RUNNING;
449 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
450 if (dev->drvmap[i] == di)
451 isdn_all_eaz(di, dev->chanmap[i]);
452 set_global_features();
453 break;
454 case ISDN_STAT_STOP:
455 dev->drv[di]->flags &= ~DRV_FLAG_RUNNING;
456 break;
457 case ISDN_STAT_ICALL:
458 if (i < 0)
459 return -1;
460 #ifdef ISDN_DEBUG_STATCALLB
461 printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num);
462 #endif
463 if (dev->global_flags & ISDN_GLOBAL_STOPPED) {
464 cmd.driver = di;
465 cmd.arg = c->arg;
466 cmd.command = ISDN_CMD_HANGUP;
467 isdn_command(&cmd);
468 return 0;
469 }
470 /* Try to find a network-interface which will accept incoming call */
471 r = ((c->command == ISDN_STAT_ICALLW) ? 0 : isdn_net_find_icall(di, c->arg, i, &c->parm.setup));
472 switch (r) {
473 case 0:
474 /* No network-device replies.
475 * Try ttyI's.
476 * These return 0 on no match, 1 on match and
477 * 3 on eventually match, if CID is longer.
478 */
479 if (c->command == ISDN_STAT_ICALL)
480 if ((retval = isdn_tty_find_icall(di, c->arg, &c->parm.setup))) return(retval);
481 #ifdef CONFIG_ISDN_DIVERSION
482 if (divert_if)
483 if ((retval = divert_if->stat_callback(c)))
484 return(retval); /* processed */
485 #endif /* CONFIG_ISDN_DIVERSION */
486 if ((!retval) && (dev->drv[di]->flags & DRV_FLAG_REJBUS)) {
487 /* No tty responding */
488 cmd.driver = di;
489 cmd.arg = c->arg;
490 cmd.command = ISDN_CMD_HANGUP;
491 isdn_command(&cmd);
492 retval = 2;
493 }
494 break;
495 case 1:
496 /* Schedule connection-setup */
497 isdn_net_dial();
498 cmd.driver = di;
499 cmd.arg = c->arg;
500 cmd.command = ISDN_CMD_ACCEPTD;
501 for ( p = dev->netdev; p; p = p->next )
502 if ( p->local->isdn_channel == cmd.arg )
503 {
504 strcpy( cmd.parm.setup.eazmsn, p->local->msn );
505 isdn_command(&cmd);
506 retval = 1;
507 break;
508 }
509 break;
510
511 case 2: /* For calling back, first reject incoming call ... */
512 case 3: /* Interface found, but down, reject call actively */
513 retval = 2;
514 printk(KERN_INFO "isdn: Rejecting Call\n");
515 cmd.driver = di;
516 cmd.arg = c->arg;
517 cmd.command = ISDN_CMD_HANGUP;
518 isdn_command(&cmd);
519 if (r == 3)
520 break;
521 /* Fall through */
522 case 4:
523 /* ... then start callback. */
524 isdn_net_dial();
525 break;
526 case 5:
527 /* Number would eventually match, if longer */
528 retval = 3;
529 break;
530 }
531 #ifdef ISDN_DEBUG_STATCALLB
532 printk(KERN_DEBUG "ICALL: ret=%d\n", retval);
533 #endif
534 return retval;
535 break;
536 case ISDN_STAT_CINF:
537 if (i < 0)
538 return -1;
539 #ifdef ISDN_DEBUG_STATCALLB
540 printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num);
541 #endif
542 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
543 return 0;
544 if (strcmp(c->parm.num, "0"))
545 isdn_net_stat_callback(i, c);
546 isdn_tty_stat_callback(i, c);
547 break;
548 case ISDN_STAT_CAUSE:
549 #ifdef ISDN_DEBUG_STATCALLB
550 printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num);
551 #endif
552 printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n",
553 dev->drvid[di], c->arg, c->parm.num);
554 isdn_tty_stat_callback(i, c);
555 #ifdef CONFIG_ISDN_DIVERSION
556 if (divert_if)
557 divert_if->stat_callback(c);
558 #endif /* CONFIG_ISDN_DIVERSION */
559 break;
560 case ISDN_STAT_DISPLAY:
561 #ifdef ISDN_DEBUG_STATCALLB
562 printk(KERN_DEBUG "DISPLAY: %ld %s\n", c->arg, c->parm.display);
563 #endif
564 isdn_tty_stat_callback(i, c);
565 #ifdef CONFIG_ISDN_DIVERSION
566 if (divert_if)
567 divert_if->stat_callback(c);
568 #endif /* CONFIG_ISDN_DIVERSION */
569 break;
570 case ISDN_STAT_DCONN:
571 if (i < 0)
572 return -1;
573 #ifdef ISDN_DEBUG_STATCALLB
574 printk(KERN_DEBUG "DCONN: %ld\n", c->arg);
575 #endif
576 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
577 return 0;
578 /* Find any net-device, waiting for D-channel setup */
579 if (isdn_net_stat_callback(i, c))
580 break;
581 isdn_v110_stat_callback(i, c);
582 /* Find any ttyI, waiting for D-channel setup */
583 if (isdn_tty_stat_callback(i, c)) {
584 cmd.driver = di;
585 cmd.arg = c->arg;
586 cmd.command = ISDN_CMD_ACCEPTB;
587 isdn_command(&cmd);
588 break;
589 }
590 break;
591 case ISDN_STAT_DHUP:
592 if (i < 0)
593 return -1;
594 #ifdef ISDN_DEBUG_STATCALLB
595 printk(KERN_DEBUG "DHUP: %ld\n", c->arg);
596 #endif
597 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
598 return 0;
599 dev->drv[di]->online &= ~(1 << (c->arg));
600 isdn_info_update();
601 /* Signal hangup to network-devices */
602 if (isdn_net_stat_callback(i, c))
603 break;
604 isdn_v110_stat_callback(i, c);
605 if (isdn_tty_stat_callback(i, c))
606 break;
607 #ifdef CONFIG_ISDN_DIVERSION
608 if (divert_if)
609 divert_if->stat_callback(c);
610 #endif /* CONFIG_ISDN_DIVERSION */
611 break;
612 break;
613 case ISDN_STAT_BCONN:
614 if (i < 0)
615 return -1;
616 #ifdef ISDN_DEBUG_STATCALLB
617 printk(KERN_DEBUG "BCONN: %ld\n", c->arg);
618 #endif
619 /* Signal B-channel-connect to network-devices */
620 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
621 return 0;
622 dev->drv[di]->online |= (1 << (c->arg));
623 isdn_info_update();
624 if (isdn_net_stat_callback(i, c))
625 break;
626 isdn_v110_stat_callback(i, c);
627 if (isdn_tty_stat_callback(i, c))
628 break;
629 break;
630 case ISDN_STAT_BHUP:
631 if (i < 0)
632 return -1;
633 #ifdef ISDN_DEBUG_STATCALLB
634 printk(KERN_DEBUG "BHUP: %ld\n", c->arg);
635 #endif
636 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
637 return 0;
638 dev->drv[di]->online &= ~(1 << (c->arg));
639 isdn_info_update();
640 #ifdef CONFIG_ISDN_X25
641 /* Signal hangup to network-devices */
642 if (isdn_net_stat_callback(i, c))
643 break;
644 #endif
645 isdn_v110_stat_callback(i, c);
646 if (isdn_tty_stat_callback(i, c))
647 break;
648 break;
649 case ISDN_STAT_NODCH:
650 if (i < 0)
651 return -1;
652 #ifdef ISDN_DEBUG_STATCALLB
653 printk(KERN_DEBUG "NODCH: %ld\n", c->arg);
654 #endif
655 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
656 return 0;
657 if (isdn_net_stat_callback(i, c))
658 break;
659 if (isdn_tty_stat_callback(i, c))
660 break;
661 break;
662 case ISDN_STAT_ADDCH:
663 spin_lock_irqsave(&dev->lock, flags);
664 if (isdn_add_channels(dev->drv[di], di, c->arg, 1)) {
665 spin_unlock_irqrestore(&dev->lock, flags);
666 return -1;
667 }
668 spin_unlock_irqrestore(&dev->lock, flags);
669 isdn_info_update();
670 break;
671 case ISDN_STAT_DISCH:
672 spin_lock_irqsave(&dev->lock, flags);
673 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
674 if ((dev->drvmap[i] == di) &&
675 (dev->chanmap[i] == c->arg)) {
676 if (c->parm.num[0])
677 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
678 else
679 if (USG_NONE(dev->usage[i])) {
680 dev->usage[i] |= ISDN_USAGE_DISABLED;
681 }
682 else
683 retval = -1;
684 break;
685 }
686 spin_unlock_irqrestore(&dev->lock, flags);
687 isdn_info_update();
688 break;
689 case ISDN_STAT_UNLOAD:
690 while (dev->drv[di]->locks > 0) {
691 isdn_unlock_driver(dev->drv[di]);
692 }
693 spin_lock_irqsave(&dev->lock, flags);
694 isdn_tty_stat_callback(i, c);
695 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
696 if (dev->drvmap[i] == di) {
697 dev->drvmap[i] = -1;
698 dev->chanmap[i] = -1;
699 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
700 }
701 dev->drivers--;
702 dev->channels -= dev->drv[di]->channels;
703 kfree(dev->drv[di]->rcverr);
704 kfree(dev->drv[di]->rcvcount);
705 for (i = 0; i < dev->drv[di]->channels; i++)
706 skb_queue_purge(&dev->drv[di]->rpqueue[i]);
707 kfree(dev->drv[di]->rpqueue);
708 kfree(dev->drv[di]->rcv_waitq);
709 kfree(dev->drv[di]);
710 dev->drv[di] = NULL;
711 dev->drvid[di][0] = '\0';
712 isdn_info_update();
713 set_global_features();
714 spin_unlock_irqrestore(&dev->lock, flags);
715 return 0;
716 case ISDN_STAT_L1ERR:
717 break;
718 case CAPI_PUT_MESSAGE:
719 return(isdn_capi_rec_hl_msg(&c->parm.cmsg));
720 #ifdef CONFIG_ISDN_TTY_FAX
721 case ISDN_STAT_FAXIND:
722 isdn_tty_stat_callback(i, c);
723 break;
724 #endif
725 #ifdef CONFIG_ISDN_AUDIO
726 case ISDN_STAT_AUDIO:
727 isdn_tty_stat_callback(i, c);
728 break;
729 #endif
730 #ifdef CONFIG_ISDN_DIVERSION
731 case ISDN_STAT_PROT:
732 case ISDN_STAT_REDIR:
733 if (divert_if)
734 return(divert_if->stat_callback(c));
735 #endif /* CONFIG_ISDN_DIVERSION */
736 default:
737 return -1;
738 }
739 return 0;
740 }
741
742 /*
743 * Get integer from char-pointer, set pointer to end of number
744 */
745 int
746 isdn_getnum(char **p)
747 {
748 int v = -1;
749
750 while (*p[0] >= '0' && *p[0] <= '9')
751 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0');
752 return v;
753 }
754
755 #define DLE 0x10
756
757 /*
758 * isdn_readbchan() tries to get data from the read-queue.
759 * It MUST be called with interrupts off.
760 *
761 * Be aware that this is not an atomic operation when sleep != 0, even though
762 * interrupts are turned off! Well, like that we are currently only called
763 * on behalf of a read system call on raw device files (which are documented
764 * to be dangerous and for for debugging purpose only). The inode semaphore
765 * takes care that this is not called for the same minor device number while
766 * we are sleeping, but access is not serialized against simultaneous read()
767 * from the corresponding ttyI device. Can other ugly events, like changes
768 * of the mapping (di,ch)<->minor, happen during the sleep? --he
769 */
770 int
771 isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, wait_queue_head_t *sleep)
772 {
773 int count;
774 int count_pull;
775 int count_put;
776 int dflag;
777 struct sk_buff *skb;
778 u_char *cp;
779
780 if (!dev->drv[di])
781 return 0;
782 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) {
783 if (sleep)
784 interruptible_sleep_on(sleep);
785 else
786 return 0;
787 }
788 if (len > dev->drv[di]->rcvcount[channel])
789 len = dev->drv[di]->rcvcount[channel];
790 cp = buf;
791 count = 0;
792 while (len) {
793 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
794 break;
795 #ifdef CONFIG_ISDN_AUDIO
796 if (ISDN_AUDIO_SKB_LOCK(skb))
797 break;
798 ISDN_AUDIO_SKB_LOCK(skb) = 1;
799 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
800 char *p = skb->data;
801 unsigned long DLEmask = (1 << channel);
802
803 dflag = 0;
804 count_pull = count_put = 0;
805 while ((count_pull < skb->len) && (len > 0)) {
806 len--;
807 if (dev->drv[di]->DLEflag & DLEmask) {
808 *cp++ = DLE;
809 dev->drv[di]->DLEflag &= ~DLEmask;
810 } else {
811 *cp++ = *p;
812 if (*p == DLE) {
813 dev->drv[di]->DLEflag |= DLEmask;
814 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
815 }
816 p++;
817 count_pull++;
818 }
819 count_put++;
820 }
821 if (count_pull >= skb->len)
822 dflag = 1;
823 } else {
824 #endif
825 /* No DLE's in buff, so simply copy it */
826 dflag = 1;
827 if ((count_pull = skb->len) > len) {
828 count_pull = len;
829 dflag = 0;
830 }
831 count_put = count_pull;
832 skb_copy_from_linear_data(skb, cp, count_put);
833 cp += count_put;
834 len -= count_put;
835 #ifdef CONFIG_ISDN_AUDIO
836 }
837 #endif
838 count += count_put;
839 if (fp) {
840 memset(fp, 0, count_put);
841 fp += count_put;
842 }
843 if (dflag) {
844 /* We got all the data in this buff.
845 * Now we can dequeue it.
846 */
847 if (fp)
848 *(fp - 1) = 0xff;
849 #ifdef CONFIG_ISDN_AUDIO
850 ISDN_AUDIO_SKB_LOCK(skb) = 0;
851 #endif
852 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
853 dev_kfree_skb(skb);
854 } else {
855 /* Not yet emptied this buff, so it
856 * must stay in the queue, for further calls
857 * but we pull off the data we got until now.
858 */
859 skb_pull(skb, count_pull);
860 #ifdef CONFIG_ISDN_AUDIO
861 ISDN_AUDIO_SKB_LOCK(skb) = 0;
862 #endif
863 }
864 dev->drv[di]->rcvcount[channel] -= count_put;
865 }
866 return count;
867 }
868
869 /*
870 * isdn_readbchan_tty() tries to get data from the read-queue.
871 * It MUST be called with interrupts off.
872 *
873 * Be aware that this is not an atomic operation when sleep != 0, even though
874 * interrupts are turned off! Well, like that we are currently only called
875 * on behalf of a read system call on raw device files (which are documented
876 * to be dangerous and for for debugging purpose only). The inode semaphore
877 * takes care that this is not called for the same minor device number while
878 * we are sleeping, but access is not serialized against simultaneous read()
879 * from the corresponding ttyI device. Can other ugly events, like changes
880 * of the mapping (di,ch)<->minor, happen during the sleep? --he
881 */
882 int
883 isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
884 {
885 int count;
886 int count_pull;
887 int count_put;
888 int dflag;
889 struct sk_buff *skb;
890 char last = 0;
891 int len;
892
893 if (!dev->drv[di])
894 return 0;
895 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
896 return 0;
897
898 len = tty_buffer_request_room(tty, dev->drv[di]->rcvcount[channel]);
899 if(len == 0)
900 return len;
901
902 count = 0;
903 while (len) {
904 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
905 break;
906 #ifdef CONFIG_ISDN_AUDIO
907 if (ISDN_AUDIO_SKB_LOCK(skb))
908 break;
909 ISDN_AUDIO_SKB_LOCK(skb) = 1;
910 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
911 char *p = skb->data;
912 unsigned long DLEmask = (1 << channel);
913
914 dflag = 0;
915 count_pull = count_put = 0;
916 while ((count_pull < skb->len) && (len > 0)) {
917 /* 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 #ifdef CONFIG_NETDEVICES
1284 char *s;
1285 #endif
1286 union iocpar {
1287 char name[10];
1288 char bname[22];
1289 isdn_ioctl_struct iocts;
1290 isdn_net_ioctl_phone phone;
1291 isdn_net_ioctl_cfg cfg;
1292 } iocpar;
1293 void __user *argp = (void __user *)arg;
1294
1295 #define name iocpar.name
1296 #define bname iocpar.bname
1297 #define iocts iocpar.iocts
1298 #define phone iocpar.phone
1299 #define cfg iocpar.cfg
1300
1301 if (minor == ISDN_MINOR_STATUS) {
1302 switch (cmd) {
1303 case IIOCGETDVR:
1304 return (TTY_DV +
1305 (NET_DV << 8) +
1306 (INF_DV << 16));
1307 case IIOCGETCPS:
1308 if (arg) {
1309 ulong __user *p = argp;
1310 int i;
1311 if (!access_ok(VERIFY_WRITE, p,
1312 sizeof(ulong) * ISDN_MAX_CHANNELS * 2))
1313 return -EFAULT;
1314 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1315 put_user(dev->ibytes[i], p++);
1316 put_user(dev->obytes[i], p++);
1317 }
1318 return 0;
1319 } else
1320 return -EINVAL;
1321 break;
1322 #ifdef CONFIG_NETDEVICES
1323 case IIOCNETGPN:
1324 /* Get peer phone number of a connected
1325 * isdn network interface */
1326 if (arg) {
1327 if (copy_from_user(&phone, argp, sizeof(phone)))
1328 return -EFAULT;
1329 return isdn_net_getpeer(&phone, argp);
1330 } else
1331 return -EINVAL;
1332 #endif
1333 default:
1334 return -EINVAL;
1335 }
1336 }
1337 if (!dev->drivers)
1338 return -ENODEV;
1339 if (minor <= ISDN_MINOR_BMAX) {
1340 drvidx = isdn_minor2drv(minor);
1341 if (drvidx < 0)
1342 return -ENODEV;
1343 chidx = isdn_minor2chan(minor);
1344 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1345 return -ENODEV;
1346 return 0;
1347 }
1348 if (minor <= ISDN_MINOR_CTRLMAX) {
1349 /*
1350 * isdn net devices manage lots of configuration variables as linked lists.
1351 * Those lists must only be manipulated from user space. Some of the ioctl's
1352 * service routines access user space and are not atomic. Therefor, ioctl's
1353 * manipulating the lists and ioctl's sleeping while accessing the lists
1354 * are serialized by means of a semaphore.
1355 */
1356 switch (cmd) {
1357 case IIOCNETDWRSET:
1358 printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
1359 return(-EINVAL);
1360 case IIOCNETLCR:
1361 printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
1362 return -ENODEV;
1363 #ifdef CONFIG_NETDEVICES
1364 case IIOCNETAIF:
1365 /* Add a network-interface */
1366 if (arg) {
1367 if (copy_from_user(name, argp, sizeof(name)))
1368 return -EFAULT;
1369 s = name;
1370 } else {
1371 s = NULL;
1372 }
1373 ret = mutex_lock_interruptible(&dev->mtx);
1374 if( ret ) return ret;
1375 if ((s = isdn_net_new(s, NULL))) {
1376 if (copy_to_user(argp, s, strlen(s) + 1)){
1377 ret = -EFAULT;
1378 } else {
1379 ret = 0;
1380 }
1381 } else
1382 ret = -ENODEV;
1383 mutex_unlock(&dev->mtx);
1384 return ret;
1385 case IIOCNETASL:
1386 /* Add a slave to a network-interface */
1387 if (arg) {
1388 if (copy_from_user(bname, argp, sizeof(bname) - 1))
1389 return -EFAULT;
1390 } else
1391 return -EINVAL;
1392 ret = mutex_lock_interruptible(&dev->mtx);
1393 if( ret ) return ret;
1394 if ((s = isdn_net_newslave(bname))) {
1395 if (copy_to_user(argp, s, strlen(s) + 1)){
1396 ret = -EFAULT;
1397 } else {
1398 ret = 0;
1399 }
1400 } else
1401 ret = -ENODEV;
1402 mutex_unlock(&dev->mtx);
1403 return ret;
1404 case IIOCNETDIF:
1405 /* Delete a network-interface */
1406 if (arg) {
1407 if (copy_from_user(name, argp, sizeof(name)))
1408 return -EFAULT;
1409 ret = mutex_lock_interruptible(&dev->mtx);
1410 if( ret ) return ret;
1411 ret = isdn_net_rm(name);
1412 mutex_unlock(&dev->mtx);
1413 return ret;
1414 } else
1415 return -EINVAL;
1416 case IIOCNETSCF:
1417 /* Set configurable parameters of a network-interface */
1418 if (arg) {
1419 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1420 return -EFAULT;
1421 return isdn_net_setcfg(&cfg);
1422 } else
1423 return -EINVAL;
1424 case IIOCNETGCF:
1425 /* Get configurable parameters of a network-interface */
1426 if (arg) {
1427 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1428 return -EFAULT;
1429 if (!(ret = isdn_net_getcfg(&cfg))) {
1430 if (copy_to_user(argp, &cfg, sizeof(cfg)))
1431 return -EFAULT;
1432 }
1433 return ret;
1434 } else
1435 return -EINVAL;
1436 case IIOCNETANM:
1437 /* Add a phone-number to a network-interface */
1438 if (arg) {
1439 if (copy_from_user(&phone, argp, sizeof(phone)))
1440 return -EFAULT;
1441 ret = mutex_lock_interruptible(&dev->mtx);
1442 if( ret ) return ret;
1443 ret = isdn_net_addphone(&phone);
1444 mutex_unlock(&dev->mtx);
1445 return ret;
1446 } else
1447 return -EINVAL;
1448 case IIOCNETGNM:
1449 /* Get list of phone-numbers of a network-interface */
1450 if (arg) {
1451 if (copy_from_user(&phone, argp, sizeof(phone)))
1452 return -EFAULT;
1453 ret = mutex_lock_interruptible(&dev->mtx);
1454 if( ret ) return ret;
1455 ret = isdn_net_getphones(&phone, argp);
1456 mutex_unlock(&dev->mtx);
1457 return ret;
1458 } else
1459 return -EINVAL;
1460 case IIOCNETDNM:
1461 /* Delete a phone-number of a network-interface */
1462 if (arg) {
1463 if (copy_from_user(&phone, argp, sizeof(phone)))
1464 return -EFAULT;
1465 ret = mutex_lock_interruptible(&dev->mtx);
1466 if( ret ) return ret;
1467 ret = isdn_net_delphone(&phone);
1468 mutex_unlock(&dev->mtx);
1469 return ret;
1470 } else
1471 return -EINVAL;
1472 case IIOCNETDIL:
1473 /* Force dialing of a network-interface */
1474 if (arg) {
1475 if (copy_from_user(name, argp, sizeof(name)))
1476 return -EFAULT;
1477 return isdn_net_force_dial(name);
1478 } else
1479 return -EINVAL;
1480 #ifdef CONFIG_ISDN_PPP
1481 case IIOCNETALN:
1482 if (!arg)
1483 return -EINVAL;
1484 if (copy_from_user(name, argp, sizeof(name)))
1485 return -EFAULT;
1486 return isdn_ppp_dial_slave(name);
1487 case IIOCNETDLN:
1488 if (!arg)
1489 return -EINVAL;
1490 if (copy_from_user(name, argp, sizeof(name)))
1491 return -EFAULT;
1492 return isdn_ppp_hangup_slave(name);
1493 #endif
1494 case IIOCNETHUP:
1495 /* Force hangup of a network-interface */
1496 if (!arg)
1497 return -EINVAL;
1498 if (copy_from_user(name, argp, sizeof(name)))
1499 return -EFAULT;
1500 return isdn_net_force_hangup(name);
1501 break;
1502 #endif /* CONFIG_NETDEVICES */
1503 case IIOCSETVER:
1504 dev->net_verbose = arg;
1505 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1506 return 0;
1507 case IIOCSETGST:
1508 if (arg)
1509 dev->global_flags |= ISDN_GLOBAL_STOPPED;
1510 else
1511 dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1512 printk(KERN_INFO "isdn: Global Mode %s\n",
1513 (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1514 return 0;
1515 case IIOCSETBRJ:
1516 drvidx = -1;
1517 if (arg) {
1518 int i;
1519 char *p;
1520 if (copy_from_user(&iocts, argp,
1521 sizeof(isdn_ioctl_struct)))
1522 return -EFAULT;
1523 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1524 if (strlen(iocts.drvid)) {
1525 if ((p = strchr(iocts.drvid, ',')))
1526 *p = 0;
1527 drvidx = -1;
1528 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1529 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1530 drvidx = i;
1531 break;
1532 }
1533 }
1534 }
1535 if (drvidx == -1)
1536 return -ENODEV;
1537 if (iocts.arg)
1538 dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
1539 else
1540 dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
1541 return 0;
1542 case IIOCSIGPRF:
1543 dev->profd = current;
1544 return 0;
1545 break;
1546 case IIOCGETPRF:
1547 /* Get all Modem-Profiles */
1548 if (arg) {
1549 char __user *p = argp;
1550 int i;
1551
1552 if (!access_ok(VERIFY_WRITE, argp,
1553 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1554 * ISDN_MAX_CHANNELS))
1555 return -EFAULT;
1556
1557 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1558 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1559 ISDN_MODEM_NUMREG))
1560 return -EFAULT;
1561 p += ISDN_MODEM_NUMREG;
1562 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1563 return -EFAULT;
1564 p += ISDN_MSNLEN;
1565 if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
1566 return -EFAULT;
1567 p += ISDN_LMSNLEN;
1568 }
1569 return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
1570 } else
1571 return -EINVAL;
1572 break;
1573 case IIOCSETPRF:
1574 /* Set all Modem-Profiles */
1575 if (arg) {
1576 char __user *p = argp;
1577 int i;
1578
1579 if (!access_ok(VERIFY_READ, argp,
1580 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1581 * ISDN_MAX_CHANNELS))
1582 return -EFAULT;
1583
1584 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1585 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1586 ISDN_MODEM_NUMREG))
1587 return -EFAULT;
1588 p += ISDN_MODEM_NUMREG;
1589 if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
1590 return -EFAULT;
1591 p += ISDN_LMSNLEN;
1592 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1593 return -EFAULT;
1594 p += ISDN_MSNLEN;
1595 }
1596 return 0;
1597 } else
1598 return -EINVAL;
1599 break;
1600 case IIOCSETMAP:
1601 case IIOCGETMAP:
1602 /* Set/Get MSN->EAZ-Mapping for a driver */
1603 if (arg) {
1604
1605 if (copy_from_user(&iocts, argp,
1606 sizeof(isdn_ioctl_struct)))
1607 return -EFAULT;
1608 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1609 if (strlen(iocts.drvid)) {
1610 drvidx = -1;
1611 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1612 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1613 drvidx = i;
1614 break;
1615 }
1616 } else
1617 drvidx = 0;
1618 if (drvidx == -1)
1619 return -ENODEV;
1620 if (cmd == IIOCSETMAP) {
1621 int loop = 1;
1622
1623 p = (char __user *) iocts.arg;
1624 i = 0;
1625 while (loop) {
1626 int j = 0;
1627
1628 while (1) {
1629 if (!access_ok(VERIFY_READ, p, 1))
1630 return -EFAULT;
1631 get_user(bname[j], p++);
1632 switch (bname[j]) {
1633 case '\0':
1634 loop = 0;
1635 /* Fall through */
1636 case ',':
1637 bname[j] = '\0';
1638 strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
1639 j = ISDN_MSNLEN;
1640 break;
1641 default:
1642 j++;
1643 }
1644 if (j >= ISDN_MSNLEN)
1645 break;
1646 }
1647 if (++i > 9)
1648 break;
1649 }
1650 } else {
1651 p = (char __user *) iocts.arg;
1652 for (i = 0; i < 10; i++) {
1653 snprintf(bname, sizeof(bname), "%s%s",
1654 strlen(dev->drv[drvidx]->msn2eaz[i]) ?
1655 dev->drv[drvidx]->msn2eaz[i] : "_",
1656 (i < 9) ? "," : "\0");
1657 if (copy_to_user(p, bname, strlen(bname) + 1))
1658 return -EFAULT;
1659 p += strlen(bname);
1660 }
1661 }
1662 return 0;
1663 } else
1664 return -EINVAL;
1665 case IIOCDBGVAR:
1666 if (arg) {
1667 if (copy_to_user(argp, &dev, sizeof(ulong)))
1668 return -EFAULT;
1669 return 0;
1670 } else
1671 return -EINVAL;
1672 break;
1673 default:
1674 if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
1675 cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
1676 else
1677 return -EINVAL;
1678 if (arg) {
1679 int i;
1680 char *p;
1681 if (copy_from_user(&iocts, argp, sizeof(isdn_ioctl_struct)))
1682 return -EFAULT;
1683 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1684 if (strlen(iocts.drvid)) {
1685 if ((p = strchr(iocts.drvid, ',')))
1686 *p = 0;
1687 drvidx = -1;
1688 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1689 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1690 drvidx = i;
1691 break;
1692 }
1693 } else
1694 drvidx = 0;
1695 if (drvidx == -1)
1696 return -ENODEV;
1697 if (!access_ok(VERIFY_WRITE, argp,
1698 sizeof(isdn_ioctl_struct)))
1699 return -EFAULT;
1700 c.driver = drvidx;
1701 c.command = ISDN_CMD_IOCTL;
1702 c.arg = cmd;
1703 memcpy(c.parm.num, &iocts.arg, sizeof(ulong));
1704 ret = isdn_command(&c);
1705 memcpy(&iocts.arg, c.parm.num, sizeof(ulong));
1706 if (copy_to_user(argp, &iocts, sizeof(isdn_ioctl_struct)))
1707 return -EFAULT;
1708 return ret;
1709 } else
1710 return -EINVAL;
1711 }
1712 }
1713 #ifdef CONFIG_ISDN_PPP
1714 if (minor <= ISDN_MINOR_PPPMAX)
1715 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1716 #endif
1717 return -ENODEV;
1718
1719 #undef name
1720 #undef bname
1721 #undef iocts
1722 #undef phone
1723 #undef cfg
1724 }
1725
1726 /*
1727 * Open the device code.
1728 */
1729 static int
1730 isdn_open(struct inode *ino, struct file *filep)
1731 {
1732 uint minor = iminor(ino);
1733 int drvidx;
1734 int chidx;
1735 int retval = -ENODEV;
1736
1737 lock_kernel();
1738 if (minor == ISDN_MINOR_STATUS) {
1739 infostruct *p;
1740
1741 if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1742 p->next = (char *) dev->infochain;
1743 p->private = (char *) &(filep->private_data);
1744 dev->infochain = p;
1745 /* At opening we allow a single update */
1746 filep->private_data = (char *) 1;
1747 retval = 0;
1748 goto out;
1749 } else {
1750 retval = -ENOMEM;
1751 goto out;
1752 }
1753 }
1754 if (!dev->channels)
1755 goto out;
1756 if (minor <= ISDN_MINOR_BMAX) {
1757 printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
1758 drvidx = isdn_minor2drv(minor);
1759 if (drvidx < 0)
1760 goto out;
1761 chidx = isdn_minor2chan(minor);
1762 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1763 goto out;
1764 if (!(dev->drv[drvidx]->online & (1 << chidx)))
1765 goto out;
1766 isdn_lock_drivers();
1767 retval = 0;
1768 goto out;
1769 }
1770 if (minor <= ISDN_MINOR_CTRLMAX) {
1771 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1772 if (drvidx < 0)
1773 goto out;
1774 isdn_lock_drivers();
1775 retval = 0;
1776 goto out;
1777 }
1778 #ifdef CONFIG_ISDN_PPP
1779 if (minor <= ISDN_MINOR_PPPMAX) {
1780 retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
1781 if (retval == 0)
1782 isdn_lock_drivers();
1783 goto out;
1784 }
1785 #endif
1786 out:
1787 nonseekable_open(ino, filep);
1788 unlock_kernel();
1789 return retval;
1790 }
1791
1792 static int
1793 isdn_close(struct inode *ino, struct file *filep)
1794 {
1795 uint minor = iminor(ino);
1796
1797 lock_kernel();
1798 if (minor == ISDN_MINOR_STATUS) {
1799 infostruct *p = dev->infochain;
1800 infostruct *q = NULL;
1801
1802 while (p) {
1803 if (p->private == (char *) &(filep->private_data)) {
1804 if (q)
1805 q->next = p->next;
1806 else
1807 dev->infochain = (infostruct *) (p->next);
1808 kfree(p);
1809 goto out;
1810 }
1811 q = p;
1812 p = (infostruct *) (p->next);
1813 }
1814 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1815 goto out;
1816 }
1817 isdn_unlock_drivers();
1818 if (minor <= ISDN_MINOR_BMAX)
1819 goto out;
1820 if (minor <= ISDN_MINOR_CTRLMAX) {
1821 if (dev->profd == current)
1822 dev->profd = NULL;
1823 goto out;
1824 }
1825 #ifdef CONFIG_ISDN_PPP
1826 if (minor <= ISDN_MINOR_PPPMAX)
1827 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1828 #endif
1829
1830 out:
1831 unlock_kernel();
1832 return 0;
1833 }
1834
1835 static const struct file_operations isdn_fops =
1836 {
1837 .owner = THIS_MODULE,
1838 .llseek = no_llseek,
1839 .read = isdn_read,
1840 .write = isdn_write,
1841 .poll = isdn_poll,
1842 .ioctl = isdn_ioctl,
1843 .open = isdn_open,
1844 .release = isdn_close,
1845 };
1846
1847 char *
1848 isdn_map_eaz2msn(char *msn, int di)
1849 {
1850 isdn_driver_t *this = dev->drv[di];
1851 int i;
1852
1853 if (strlen(msn) == 1) {
1854 i = msn[0] - '0';
1855 if ((i >= 0) && (i <= 9))
1856 if (strlen(this->msn2eaz[i]))
1857 return (this->msn2eaz[i]);
1858 }
1859 return (msn);
1860 }
1861
1862 /*
1863 * Find an unused ISDN-channel, whose feature-flags match the
1864 * given L2- and L3-protocols.
1865 */
1866 #define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038))
1867
1868 /*
1869 * This function must be called with holding the dev->lock.
1870 */
1871 int
1872 isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1873 ,int pre_chan, char *msn)
1874 {
1875 int i;
1876 ulong features;
1877 ulong vfeatures;
1878
1879 features = ((1 << l2_proto) | (0x10000 << l3_proto));
1880 vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1881 ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038));
1882 /* If Layer-2 protocol is V.110, accept drivers with
1883 * transparent feature even if these don't support V.110
1884 * because we can emulate this in linklevel.
1885 */
1886 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1887 if (USG_NONE(dev->usage[i]) &&
1888 (dev->drvmap[i] != -1)) {
1889 int d = dev->drvmap[i];
1890 if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1891 ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1892 continue;
1893 if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
1894 continue;
1895 if (dev->usage[i] & ISDN_USAGE_DISABLED)
1896 continue; /* usage not allowed */
1897 if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
1898 if (((dev->drv[d]->interface->features & features) == features) ||
1899 (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1900 (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1901 if ((pre_dev < 0) || (pre_chan < 0)) {
1902 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1903 dev->usage[i] |= usage;
1904 isdn_info_update();
1905 return i;
1906 } else {
1907 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1908 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1909 dev->usage[i] |= usage;
1910 isdn_info_update();
1911 return i;
1912 }
1913 }
1914 }
1915 }
1916 }
1917 return -1;
1918 }
1919
1920 /*
1921 * Set state of ISDN-channel to 'unused'
1922 */
1923 void
1924 isdn_free_channel(int di, int ch, int usage)
1925 {
1926 int i;
1927
1928 if ((di < 0) || (ch < 0)) {
1929 printk(KERN_WARNING "%s: called with invalid drv(%d) or channel(%d)\n",
1930 __func__, di, ch);
1931 return;
1932 }
1933 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1934 if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
1935 (dev->drvmap[i] == di) &&
1936 (dev->chanmap[i] == ch)) {
1937 dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1938 strcpy(dev->num[i], "???");
1939 dev->ibytes[i] = 0;
1940 dev->obytes[i] = 0;
1941 // 20.10.99 JIM, try to reinitialize v110 !
1942 dev->v110emu[i] = 0;
1943 atomic_set(&(dev->v110use[i]), 0);
1944 isdn_v110_close(dev->v110[i]);
1945 dev->v110[i] = NULL;
1946 // 20.10.99 JIM, try to reinitialize v110 !
1947 isdn_info_update();
1948 if (dev->drv[di])
1949 skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
1950 }
1951 }
1952
1953 /*
1954 * Cancel Exclusive-Flag for ISDN-channel
1955 */
1956 void
1957 isdn_unexclusive_channel(int di, int ch)
1958 {
1959 int i;
1960
1961 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1962 if ((dev->drvmap[i] == di) &&
1963 (dev->chanmap[i] == ch)) {
1964 dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1965 isdn_info_update();
1966 return;
1967 }
1968 }
1969
1970 /*
1971 * writebuf replacement for SKB_ABLE drivers
1972 */
1973 static int
1974 isdn_writebuf_stub(int drvidx, int chan, const u_char __user * buf, int len)
1975 {
1976 int ret;
1977 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1978 struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1979
1980 if (!skb)
1981 return -ENOMEM;
1982 skb_reserve(skb, hl);
1983 if (copy_from_user(skb_put(skb, len), buf, len)) {
1984 dev_kfree_skb(skb);
1985 return -EFAULT;
1986 }
1987 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
1988 if (ret <= 0)
1989 dev_kfree_skb(skb);
1990 if (ret > 0)
1991 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
1992 return ret;
1993 }
1994
1995 /*
1996 * Return: length of data on success, -ERRcode on failure.
1997 */
1998 int
1999 isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
2000 {
2001 int ret;
2002 struct sk_buff *nskb = NULL;
2003 int v110_ret = skb->len;
2004 int idx = isdn_dc2minor(drvidx, chan);
2005
2006 if (dev->v110[idx]) {
2007 atomic_inc(&dev->v110use[idx]);
2008 nskb = isdn_v110_encode(dev->v110[idx], skb);
2009 atomic_dec(&dev->v110use[idx]);
2010 if (!nskb)
2011 return 0;
2012 v110_ret = *((int *)nskb->data);
2013 skb_pull(nskb, sizeof(int));
2014 if (!nskb->len) {
2015 dev_kfree_skb(nskb);
2016 return v110_ret;
2017 }
2018 /* V.110 must always be acknowledged */
2019 ack = 1;
2020 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
2021 } else {
2022 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
2023
2024 if( skb_headroom(skb) < hl ){
2025 /*
2026 * This should only occur when new HL driver with
2027 * increased hl_hdrlen was loaded after netdevice
2028 * was created and connected to the new driver.
2029 *
2030 * The V.110 branch (re-allocates on its own) does
2031 * not need this
2032 */
2033 struct sk_buff * skb_tmp;
2034
2035 skb_tmp = skb_realloc_headroom(skb, hl);
2036 printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
2037 if (!skb_tmp) return -ENOMEM; /* 0 better? */
2038 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
2039 if( ret > 0 ){
2040 dev_kfree_skb(skb);
2041 } else {
2042 dev_kfree_skb(skb_tmp);
2043 }
2044 } else {
2045 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
2046 }
2047 }
2048 if (ret > 0) {
2049 dev->obytes[idx] += ret;
2050 if (dev->v110[idx]) {
2051 atomic_inc(&dev->v110use[idx]);
2052 dev->v110[idx]->skbuser++;
2053 atomic_dec(&dev->v110use[idx]);
2054 /* For V.110 return unencoded data length */
2055 ret = v110_ret;
2056 /* if the complete frame was send we free the skb;
2057 if not upper function will requeue the skb */
2058 if (ret == skb->len)
2059 dev_kfree_skb(skb);
2060 }
2061 } else
2062 if (dev->v110[idx])
2063 dev_kfree_skb(nskb);
2064 return ret;
2065 }
2066
2067 static int
2068 isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
2069 {
2070 int j, k, m;
2071
2072 init_waitqueue_head(&d->st_waitq);
2073 if (d->flags & DRV_FLAG_RUNNING)
2074 return -1;
2075 if (n < 1) return 0;
2076
2077 m = (adding) ? d->channels + n : n;
2078
2079 if (dev->channels + n > ISDN_MAX_CHANNELS) {
2080 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
2081 ISDN_MAX_CHANNELS);
2082 return -1;
2083 }
2084
2085 if ((adding) && (d->rcverr))
2086 kfree(d->rcverr);
2087 if (!(d->rcverr = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2088 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
2089 return -1;
2090 }
2091
2092 if ((adding) && (d->rcvcount))
2093 kfree(d->rcvcount);
2094 if (!(d->rcvcount = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2095 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
2096 if (!adding)
2097 kfree(d->rcverr);
2098 return -1;
2099 }
2100
2101 if ((adding) && (d->rpqueue)) {
2102 for (j = 0; j < d->channels; j++)
2103 skb_queue_purge(&d->rpqueue[j]);
2104 kfree(d->rpqueue);
2105 }
2106 if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_ATOMIC))) {
2107 printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
2108 if (!adding) {
2109 kfree(d->rcvcount);
2110 kfree(d->rcverr);
2111 }
2112 return -1;
2113 }
2114 for (j = 0; j < m; j++) {
2115 skb_queue_head_init(&d->rpqueue[j]);
2116 }
2117
2118 if ((adding) && (d->rcv_waitq))
2119 kfree(d->rcv_waitq);
2120 d->rcv_waitq = kmalloc(sizeof(wait_queue_head_t) * 2 * m, GFP_ATOMIC);
2121 if (!d->rcv_waitq) {
2122 printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
2123 if (!adding) {
2124 kfree(d->rpqueue);
2125 kfree(d->rcvcount);
2126 kfree(d->rcverr);
2127 }
2128 return -1;
2129 }
2130 d->snd_waitq = d->rcv_waitq + m;
2131 for (j = 0; j < m; j++) {
2132 init_waitqueue_head(&d->rcv_waitq[j]);
2133 init_waitqueue_head(&d->snd_waitq[j]);
2134 }
2135
2136 dev->channels += n;
2137 for (j = d->channels; j < m; j++)
2138 for (k = 0; k < ISDN_MAX_CHANNELS; k++)
2139 if (dev->chanmap[k] < 0) {
2140 dev->chanmap[k] = j;
2141 dev->drvmap[k] = drvidx;
2142 break;
2143 }
2144 d->channels = m;
2145 return 0;
2146 }
2147
2148 /*
2149 * Low-level-driver registration
2150 */
2151
2152 static void
2153 set_global_features(void)
2154 {
2155 int drvidx;
2156
2157 dev->global_features = 0;
2158 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
2159 if (!dev->drv[drvidx])
2160 continue;
2161 if (dev->drv[drvidx]->interface)
2162 dev->global_features |= dev->drv[drvidx]->interface->features;
2163 }
2164 }
2165
2166 #ifdef CONFIG_ISDN_DIVERSION
2167
2168 static char *map_drvname(int di)
2169 {
2170 if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
2171 return(NULL);
2172 return(dev->drvid[di]); /* driver name */
2173 } /* map_drvname */
2174
2175 static int map_namedrv(char *id)
2176 { int i;
2177
2178 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2179 { if (!strcmp(dev->drvid[i],id))
2180 return(i);
2181 }
2182 return(-1);
2183 } /* map_namedrv */
2184
2185 int DIVERT_REG_NAME(isdn_divert_if *i_div)
2186 {
2187 if (i_div->if_magic != DIVERT_IF_MAGIC)
2188 return(DIVERT_VER_ERR);
2189 switch (i_div->cmd)
2190 {
2191 case DIVERT_CMD_REL:
2192 if (divert_if != i_div)
2193 return(DIVERT_REL_ERR);
2194 divert_if = NULL; /* free interface */
2195 return(DIVERT_NO_ERR);
2196
2197 case DIVERT_CMD_REG:
2198 if (divert_if)
2199 return(DIVERT_REG_ERR);
2200 i_div->ll_cmd = isdn_command; /* set command function */
2201 i_div->drv_to_name = map_drvname;
2202 i_div->name_to_drv = map_namedrv;
2203 divert_if = i_div; /* remember interface */
2204 return(DIVERT_NO_ERR);
2205
2206 default:
2207 return(DIVERT_CMD_ERR);
2208 }
2209 } /* DIVERT_REG_NAME */
2210
2211 EXPORT_SYMBOL(DIVERT_REG_NAME);
2212
2213 #endif /* CONFIG_ISDN_DIVERSION */
2214
2215
2216 EXPORT_SYMBOL(register_isdn);
2217 #ifdef CONFIG_ISDN_PPP
2218 EXPORT_SYMBOL(isdn_ppp_register_compressor);
2219 EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
2220 #endif
2221
2222 int
2223 register_isdn(isdn_if * i)
2224 {
2225 isdn_driver_t *d;
2226 int j;
2227 ulong flags;
2228 int drvidx;
2229
2230 if (dev->drivers >= ISDN_MAX_DRIVERS) {
2231 printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
2232 ISDN_MAX_DRIVERS);
2233 return 0;
2234 }
2235 if (!i->writebuf_skb) {
2236 printk(KERN_WARNING "register_isdn: No write routine given.\n");
2237 return 0;
2238 }
2239 if (!(d = kzalloc(sizeof(isdn_driver_t), GFP_KERNEL))) {
2240 printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
2241 return 0;
2242 }
2243
2244 d->maxbufsize = i->maxbufsize;
2245 d->pktcount = 0;
2246 d->stavail = 0;
2247 d->flags = DRV_FLAG_LOADED;
2248 d->online = 0;
2249 d->interface = i;
2250 d->channels = 0;
2251 spin_lock_irqsave(&dev->lock, flags);
2252 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2253 if (!dev->drv[drvidx])
2254 break;
2255 if (isdn_add_channels(d, drvidx, i->channels, 0)) {
2256 spin_unlock_irqrestore(&dev->lock, flags);
2257 kfree(d);
2258 return 0;
2259 }
2260 i->channels = drvidx;
2261 i->rcvcallb_skb = isdn_receive_skb_callback;
2262 i->statcallb = isdn_status_callback;
2263 if (!strlen(i->id))
2264 sprintf(i->id, "line%d", drvidx);
2265 for (j = 0; j < drvidx; j++)
2266 if (!strcmp(i->id, dev->drvid[j]))
2267 sprintf(i->id, "line%d", drvidx);
2268 dev->drv[drvidx] = d;
2269 strcpy(dev->drvid[drvidx], i->id);
2270 isdn_info_update();
2271 dev->drivers++;
2272 set_global_features();
2273 spin_unlock_irqrestore(&dev->lock, flags);
2274 return 1;
2275 }
2276
2277 /*
2278 *****************************************************************************
2279 * And now the modules code.
2280 *****************************************************************************
2281 */
2282
2283 static char *
2284 isdn_getrev(const char *revision)
2285 {
2286 char *rev;
2287 char *p;
2288
2289 if ((p = strchr(revision, ':'))) {
2290 rev = p + 2;
2291 p = strchr(rev, '$');
2292 *--p = 0;
2293 } else
2294 rev = "???";
2295 return rev;
2296 }
2297
2298 /*
2299 * Allocate and initialize all data, register modem-devices
2300 */
2301 static int __init isdn_init(void)
2302 {
2303 int i;
2304 char tmprev[50];
2305
2306 if (!(dev = vmalloc(sizeof(isdn_dev)))) {
2307 printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
2308 return -EIO;
2309 }
2310 memset((char *) dev, 0, sizeof(isdn_dev));
2311 init_timer(&dev->timer);
2312 dev->timer.function = isdn_timer_funct;
2313 spin_lock_init(&dev->lock);
2314 spin_lock_init(&dev->timerlock);
2315 #ifdef MODULE
2316 dev->owner = THIS_MODULE;
2317 #endif
2318 mutex_init(&dev->mtx);
2319 init_waitqueue_head(&dev->info_waitq);
2320 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2321 dev->drvmap[i] = -1;
2322 dev->chanmap[i] = -1;
2323 dev->m_idx[i] = -1;
2324 strcpy(dev->num[i], "???");
2325 init_waitqueue_head(&dev->mdm.info[i].open_wait);
2326 init_waitqueue_head(&dev->mdm.info[i].close_wait);
2327 }
2328 if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
2329 printk(KERN_WARNING "isdn: Could not register control devices\n");
2330 vfree(dev);
2331 return -EIO;
2332 }
2333 if ((isdn_tty_modem_init()) < 0) {
2334 printk(KERN_WARNING "isdn: Could not register tty devices\n");
2335 vfree(dev);
2336 unregister_chrdev(ISDN_MAJOR, "isdn");
2337 return -EIO;
2338 }
2339 #ifdef CONFIG_ISDN_PPP
2340 if (isdn_ppp_init() < 0) {
2341 printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
2342 isdn_tty_exit();
2343 unregister_chrdev(ISDN_MAJOR, "isdn");
2344 vfree(dev);
2345 return -EIO;
2346 }
2347 #endif /* CONFIG_ISDN_PPP */
2348
2349 strcpy(tmprev, isdn_revision);
2350 printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
2351 strcpy(tmprev, isdn_tty_revision);
2352 printk("%s/", isdn_getrev(tmprev));
2353 strcpy(tmprev, isdn_net_revision);
2354 printk("%s/", isdn_getrev(tmprev));
2355 strcpy(tmprev, isdn_ppp_revision);
2356 printk("%s/", isdn_getrev(tmprev));
2357 strcpy(tmprev, isdn_audio_revision);
2358 printk("%s/", isdn_getrev(tmprev));
2359 strcpy(tmprev, isdn_v110_revision);
2360 printk("%s", isdn_getrev(tmprev));
2361
2362 #ifdef MODULE
2363 printk(" loaded\n");
2364 #else
2365 printk("\n");
2366 #endif
2367 isdn_info_update();
2368 return 0;
2369 }
2370
2371 /*
2372 * Unload module
2373 */
2374 static void __exit isdn_exit(void)
2375 {
2376 #ifdef CONFIG_ISDN_PPP
2377 isdn_ppp_cleanup();
2378 #endif
2379 if (isdn_net_rmall() < 0) {
2380 printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
2381 return;
2382 }
2383 isdn_tty_exit();
2384 unregister_chrdev(ISDN_MAJOR, "isdn");
2385 del_timer(&dev->timer);
2386 /* call vfree with interrupts enabled, else it will hang */
2387 vfree(dev);
2388 printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
2389 }
2390
2391 module_init(isdn_init);
2392 module_exit(isdn_exit);
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