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Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
[linux/fpc-iii.git] / drivers / isdn / i4l / isdn_common.c
bloba44cdb492ea999568695428b9a8353090cea0e24
1 /* $Id: isdn_common.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
2 *
3 * Linux ISDN subsystem, common used functions (linklevel).
4 *
5 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
6 * Copyright 1995,96 Thinking Objects Software GmbH Wuerzburg
7 * Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
8 *
9 * This software may be used and distributed according to the terms
10 * of the GNU General Public License, incorporated herein by reference.
11 *
12 */
13
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/poll.h>
17 #include <linux/slab.h>
18 #include <linux/vmalloc.h>
19 #include <linux/isdn.h>
20 #include <linux/smp_lock.h>
21 #include "isdn_common.h"
22 #include "isdn_tty.h"
23 #include "isdn_net.h"
24 #include "isdn_ppp.h"
25 #ifdef CONFIG_ISDN_AUDIO
26 #include "isdn_audio.h"
27 #endif
28 #ifdef CONFIG_ISDN_DIVERSION_MODULE
29 #define CONFIG_ISDN_DIVERSION
30 #endif
31 #ifdef CONFIG_ISDN_DIVERSION
32 #include <linux/isdn_divertif.h>
33 #endif /* CONFIG_ISDN_DIVERSION */
34 #include "isdn_v110.h"
35
36 /* Debugflags */
37 #undef ISDN_DEBUG_STATCALLB
38
39 MODULE_DESCRIPTION("ISDN4Linux: link layer");
40 MODULE_AUTHOR("Fritz Elfert");
41 MODULE_LICENSE("GPL");
42
43 isdn_dev *dev;
44
45 static char *isdn_revision = "$Revision: 1.1.2.3 $";
46
47 extern char *isdn_net_revision;
48 extern char *isdn_tty_revision;
49 #ifdef CONFIG_ISDN_PPP
50 extern char *isdn_ppp_revision;
51 #else
52 static char *isdn_ppp_revision = ": none $";
53 #endif
54 #ifdef CONFIG_ISDN_AUDIO
55 extern char *isdn_audio_revision;
56 #else
57 static char *isdn_audio_revision = ": none $";
58 #endif
59 extern char *isdn_v110_revision;
60
61 #ifdef CONFIG_ISDN_DIVERSION
62 static isdn_divert_if *divert_if; /* = NULL */
63 #endif /* CONFIG_ISDN_DIVERSION */
64
65
66 static int isdn_writebuf_stub(int, int, const u_char __user *, int);
67 static void set_global_features(void);
68 static int isdn_wildmat(char *s, char *p);
69 static int isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding);
70
71 static inline void
72 isdn_lock_driver(isdn_driver_t *drv)
73 {
74 try_module_get(drv->interface->owner);
75 drv->locks++;
76 }
77
78 void
79 isdn_lock_drivers(void)
80 {
81 int i;
82
83 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
84 if (!dev->drv[i])
85 continue;
86 isdn_lock_driver(dev->drv[i]);
87 }
88 }
89
90 static inline void
91 isdn_unlock_driver(isdn_driver_t *drv)
92 {
93 if (drv->locks > 0) {
94 drv->locks--;
95 module_put(drv->interface->owner);
96 }
97 }
98
99 void
100 isdn_unlock_drivers(void)
101 {
102 int i;
103
104 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
105 if (!dev->drv[i])
106 continue;
107 isdn_unlock_driver(dev->drv[i]);
108 }
109 }
110
111 #if defined(ISDN_DEBUG_NET_DUMP) || defined(ISDN_DEBUG_MODEM_DUMP)
112 void
113 isdn_dumppkt(char *s, u_char * p, int len, int dumplen)
114 {
115 int dumpc;
116
117 printk(KERN_DEBUG "%s(%d) ", s, len);
118 for (dumpc = 0; (dumpc < dumplen) && (len); len--, dumpc++)
119 printk(" %02x", *p++);
120 printk("\n");
121 }
122 #endif
123
124 /*
125 * I picked the pattern-matching-functions from an old GNU-tar version (1.10)
126 * It was originally written and put to PD by rs@mirror.TMC.COM (Rich Salz)
127 */
128 static int
129 isdn_star(char *s, char *p)
130 {
131 while (isdn_wildmat(s, p)) {
132 if (*++s == '\0')
133 return (2);
134 }
135 return (0);
136 }
137
138 /*
139 * Shell-type Pattern-matching for incoming caller-Ids
140 * This function gets a string in s and checks, if it matches the pattern
141 * given in p.
142 *
143 * Return:
144 * 0 = match.
145 * 1 = no match.
146 * 2 = no match. Would eventually match, if s would be longer.
147 *
148 * Possible Patterns:
149 *
150 * '?' matches one character
151 * '*' matches zero or more characters
152 * [xyz] matches the set of characters in brackets.
153 * [^xyz] matches any single character not in the set of characters
154 */
155
156 static int
157 isdn_wildmat(char *s, char *p)
158 {
159 register int last;
160 register int matched;
161 register int reverse;
162 register int nostar = 1;
163
164 if (!(*s) && !(*p))
165 return(1);
166 for (; *p; s++, p++)
167 switch (*p) {
168 case '\\':
169 /*
170 * Literal match with following character,
171 * fall through.
172 */
173 p++;
174 default:
175 if (*s != *p)
176 return (*s == '\0')?2:1;
177 continue;
178 case '?':
179 /* Match anything. */
180 if (*s == '\0')
181 return (2);
182 continue;
183 case '*':
184 nostar = 0;
185 /* Trailing star matches everything. */
186 return (*++p ? isdn_star(s, p) : 0);
187 case '[':
188 /* [^....] means inverse character class. */
189 if ((reverse = (p[1] == '^')))
190 p++;
191 for (last = 0, matched = 0; *++p && (*p != ']'); last = *p)
192 /* This next line requires a good C compiler. */
193 if (*p == '-' ? *s <= *++p && *s >= last : *s == *p)
194 matched = 1;
195 if (matched == reverse)
196 return (1);
197 continue;
198 }
199 return (*s == '\0')?0:nostar;
200 }
201
202 int isdn_msncmp( const char * msn1, const char * msn2 )
203 {
204 char TmpMsn1[ ISDN_MSNLEN ];
205 char TmpMsn2[ ISDN_MSNLEN ];
206 char *p;
207
208 for ( p = TmpMsn1; *msn1 && *msn1 != ':'; ) // Strip off a SPID
209 *p++ = *msn1++;
210 *p = '\0';
211
212 for ( p = TmpMsn2; *msn2 && *msn2 != ':'; ) // Strip off a SPID
213 *p++ = *msn2++;
214 *p = '\0';
215
216 return isdn_wildmat( TmpMsn1, TmpMsn2 );
217 }
218
219 int
220 isdn_dc2minor(int di, int ch)
221 {
222 int i;
223 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
224 if (dev->chanmap[i] == ch && dev->drvmap[i] == di)
225 return i;
226 return -1;
227 }
228
229 static int isdn_timer_cnt1 = 0;
230 static int isdn_timer_cnt2 = 0;
231 static int isdn_timer_cnt3 = 0;
232
233 static void
234 isdn_timer_funct(ulong dummy)
235 {
236 int tf = dev->tflags;
237 if (tf & ISDN_TIMER_FAST) {
238 if (tf & ISDN_TIMER_MODEMREAD)
239 isdn_tty_readmodem();
240 if (tf & ISDN_TIMER_MODEMPLUS)
241 isdn_tty_modem_escape();
242 if (tf & ISDN_TIMER_MODEMXMIT)
243 isdn_tty_modem_xmit();
244 }
245 if (tf & ISDN_TIMER_SLOW) {
246 if (++isdn_timer_cnt1 >= ISDN_TIMER_02SEC) {
247 isdn_timer_cnt1 = 0;
248 if (tf & ISDN_TIMER_NETDIAL)
249 isdn_net_dial();
250 }
251 if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) {
252 isdn_timer_cnt2 = 0;
253 if (tf & ISDN_TIMER_NETHANGUP)
254 isdn_net_autohup();
255 if (++isdn_timer_cnt3 >= ISDN_TIMER_RINGING) {
256 isdn_timer_cnt3 = 0;
257 if (tf & ISDN_TIMER_MODEMRING)
258 isdn_tty_modem_ring();
259 }
260 if (tf & ISDN_TIMER_CARRIER)
261 isdn_tty_carrier_timeout();
262 }
263 }
264 if (tf)
265 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
266 }
267
268 void
269 isdn_timer_ctrl(int tf, int onoff)
270 {
271 unsigned long flags;
272 int old_tflags;
273
274 spin_lock_irqsave(&dev->timerlock, flags);
275 if ((tf & ISDN_TIMER_SLOW) && (!(dev->tflags & ISDN_TIMER_SLOW))) {
276 /* If the slow-timer wasn't activated until now */
277 isdn_timer_cnt1 = 0;
278 isdn_timer_cnt2 = 0;
279 }
280 old_tflags = dev->tflags;
281 if (onoff)
282 dev->tflags |= tf;
283 else
284 dev->tflags &= ~tf;
285 if (dev->tflags && !old_tflags)
286 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
287 spin_unlock_irqrestore(&dev->timerlock, flags);
288 }
289
290 /*
291 * Receive a packet from B-Channel. (Called from low-level-module)
292 */
293 static void
294 isdn_receive_skb_callback(int di, int channel, struct sk_buff *skb)
295 {
296 int i;
297
298 if ((i = isdn_dc2minor(di, channel)) == -1) {
299 dev_kfree_skb(skb);
300 return;
301 }
302 /* Update statistics */
303 dev->ibytes[i] += skb->len;
304
305 /* First, try to deliver data to network-device */
306 if (isdn_net_rcv_skb(i, skb))
307 return;
308
309 /* V.110 handling
310 * makes sense for async streams only, so it is
311 * called after possible net-device delivery.
312 */
313 if (dev->v110[i]) {
314 atomic_inc(&dev->v110use[i]);
315 skb = isdn_v110_decode(dev->v110[i], skb);
316 atomic_dec(&dev->v110use[i]);
317 if (!skb)
318 return;
319 }
320
321 /* No network-device found, deliver to tty or raw-channel */
322 if (skb->len) {
323 if (isdn_tty_rcv_skb(i, di, channel, skb))
324 return;
325 wake_up_interruptible(&dev->drv[di]->rcv_waitq[channel]);
326 } else
327 dev_kfree_skb(skb);
328 }
329
330 /*
331 * Intercept command from Linklevel to Lowlevel.
332 * If layer 2 protocol is V.110 and this is not supported by current
333 * lowlevel-driver, use driver's transparent mode and handle V.110 in
334 * linklevel instead.
335 */
336 int
337 isdn_command(isdn_ctrl *cmd)
338 {
339 if (cmd->driver == -1) {
340 printk(KERN_WARNING "isdn_command command(%x) driver -1\n", cmd->command);
341 return(1);
342 }
343 if (!dev->drv[cmd->driver]) {
344 printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d] NULL\n",
345 cmd->command, cmd->driver);
346 return(1);
347 }
348 if (!dev->drv[cmd->driver]->interface) {
349 printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d]->interface NULL\n",
350 cmd->command, cmd->driver);
351 return(1);
352 }
353 if (cmd->command == ISDN_CMD_SETL2) {
354 int idx = isdn_dc2minor(cmd->driver, cmd->arg & 255);
355 unsigned long l2prot = (cmd->arg >> 8) & 255;
356 unsigned long features = (dev->drv[cmd->driver]->interface->features
357 >> ISDN_FEATURE_L2_SHIFT) &
358 ISDN_FEATURE_L2_MASK;
359 unsigned long l2_feature = (1 << l2prot);
360
361 switch (l2prot) {
362 case ISDN_PROTO_L2_V11096:
363 case ISDN_PROTO_L2_V11019:
364 case ISDN_PROTO_L2_V11038:
365 /* If V.110 requested, but not supported by
366 * HL-driver, set emulator-flag and change
367 * Layer-2 to transparent
368 */
369 if (!(features & l2_feature)) {
370 dev->v110emu[idx] = l2prot;
371 cmd->arg = (cmd->arg & 255) |
372 (ISDN_PROTO_L2_TRANS << 8);
373 } else
374 dev->v110emu[idx] = 0;
375 }
376 }
377 return dev->drv[cmd->driver]->interface->command(cmd);
378 }
379
380 void
381 isdn_all_eaz(int di, int ch)
382 {
383 isdn_ctrl cmd;
384
385 if (di < 0)
386 return;
387 cmd.driver = di;
388 cmd.arg = ch;
389 cmd.command = ISDN_CMD_SETEAZ;
390 cmd.parm.num[0] = '\0';
391 isdn_command(&cmd);
392 }
393
394 /*
395 * Begin of a CAPI like LL<->HL interface, currently used only for
396 * supplementary service (CAPI 2.0 part III)
397 */
398 #include <linux/isdn/capicmd.h>
399
400 static int
401 isdn_capi_rec_hl_msg(capi_msg *cm) {
402
403 int di;
404 int ch;
405
406 di = (cm->adr.Controller & 0x7f) -1;
407 ch = isdn_dc2minor(di, (cm->adr.Controller>>8)& 0x7f);
408 switch(cm->Command) {
409 case CAPI_FACILITY:
410 /* in the moment only handled in tty */
411 return(isdn_tty_capi_facility(cm));
412 default:
413 return(-1);
414 }
415 }
416
417 static int
418 isdn_status_callback(isdn_ctrl * c)
419 {
420 int di;
421 u_long flags;
422 int i;
423 int r;
424 int retval = 0;
425 isdn_ctrl cmd;
426 isdn_net_dev *p;
427
428 di = c->driver;
429 i = isdn_dc2minor(di, c->arg);
430 switch (c->command) {
431 case ISDN_STAT_BSENT:
432 if (i < 0)
433 return -1;
434 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
435 return 0;
436 if (isdn_net_stat_callback(i, c))
437 return 0;
438 if (isdn_v110_stat_callback(i, c))
439 return 0;
440 if (isdn_tty_stat_callback(i, c))
441 return 0;
442 wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]);
443 break;
444 case ISDN_STAT_STAVAIL:
445 dev->drv[di]->stavail += c->arg;
446 wake_up_interruptible(&dev->drv[di]->st_waitq);
447 break;
448 case ISDN_STAT_RUN:
449 dev->drv[di]->flags |= DRV_FLAG_RUNNING;
450 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
451 if (dev->drvmap[i] == di)
452 isdn_all_eaz(di, dev->chanmap[i]);
453 set_global_features();
454 break;
455 case ISDN_STAT_STOP:
456 dev->drv[di]->flags &= ~DRV_FLAG_RUNNING;
457 break;
458 case ISDN_STAT_ICALL:
459 if (i < 0)
460 return -1;
461 #ifdef ISDN_DEBUG_STATCALLB
462 printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num);
463 #endif
464 if (dev->global_flags & ISDN_GLOBAL_STOPPED) {
465 cmd.driver = di;
466 cmd.arg = c->arg;
467 cmd.command = ISDN_CMD_HANGUP;
468 isdn_command(&cmd);
469 return 0;
470 }
471 /* Try to find a network-interface which will accept incoming call */
472 r = ((c->command == ISDN_STAT_ICALLW) ? 0 : isdn_net_find_icall(di, c->arg, i, &c->parm.setup));
473 switch (r) {
474 case 0:
475 /* No network-device replies.
476 * Try ttyI's.
477 * These return 0 on no match, 1 on match and
478 * 3 on eventually match, if CID is longer.
479 */
480 if (c->command == ISDN_STAT_ICALL)
481 if ((retval = isdn_tty_find_icall(di, c->arg, &c->parm.setup))) return(retval);
482 #ifdef CONFIG_ISDN_DIVERSION
483 if (divert_if)
484 if ((retval = divert_if->stat_callback(c)))
485 return(retval); /* processed */
486 #endif /* CONFIG_ISDN_DIVERSION */
487 if ((!retval) && (dev->drv[di]->flags & DRV_FLAG_REJBUS)) {
488 /* No tty responding */
489 cmd.driver = di;
490 cmd.arg = c->arg;
491 cmd.command = ISDN_CMD_HANGUP;
492 isdn_command(&cmd);
493 retval = 2;
494 }
495 break;
496 case 1:
497 /* Schedule connection-setup */
498 isdn_net_dial();
499 cmd.driver = di;
500 cmd.arg = c->arg;
501 cmd.command = ISDN_CMD_ACCEPTD;
502 for ( p = dev->netdev; p; p = p->next )
503 if ( p->local->isdn_channel == cmd.arg )
504 {
505 strcpy( cmd.parm.setup.eazmsn, p->local->msn );
506 isdn_command(&cmd);
507 retval = 1;
508 break;
509 }
510 break;
511
512 case 2: /* For calling back, first reject incoming call ... */
513 case 3: /* Interface found, but down, reject call actively */
514 retval = 2;
515 printk(KERN_INFO "isdn: Rejecting Call\n");
516 cmd.driver = di;
517 cmd.arg = c->arg;
518 cmd.command = ISDN_CMD_HANGUP;
519 isdn_command(&cmd);
520 if (r == 3)
521 break;
522 /* Fall through */
523 case 4:
524 /* ... then start callback. */
525 isdn_net_dial();
526 break;
527 case 5:
528 /* Number would eventually match, if longer */
529 retval = 3;
530 break;
531 }
532 #ifdef ISDN_DEBUG_STATCALLB
533 printk(KERN_DEBUG "ICALL: ret=%d\n", retval);
534 #endif
535 return retval;
536 break;
537 case ISDN_STAT_CINF:
538 if (i < 0)
539 return -1;
540 #ifdef ISDN_DEBUG_STATCALLB
541 printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num);
542 #endif
543 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
544 return 0;
545 if (strcmp(c->parm.num, "0"))
546 isdn_net_stat_callback(i, c);
547 isdn_tty_stat_callback(i, c);
548 break;
549 case ISDN_STAT_CAUSE:
550 #ifdef ISDN_DEBUG_STATCALLB
551 printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num);
552 #endif
553 printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n",
554 dev->drvid[di], c->arg, c->parm.num);
555 isdn_tty_stat_callback(i, c);
556 #ifdef CONFIG_ISDN_DIVERSION
557 if (divert_if)
558 divert_if->stat_callback(c);
559 #endif /* CONFIG_ISDN_DIVERSION */
560 break;
561 case ISDN_STAT_DISPLAY:
562 #ifdef ISDN_DEBUG_STATCALLB
563 printk(KERN_DEBUG "DISPLAY: %ld %s\n", c->arg, c->parm.display);
564 #endif
565 isdn_tty_stat_callback(i, c);
566 #ifdef CONFIG_ISDN_DIVERSION
567 if (divert_if)
568 divert_if->stat_callback(c);
569 #endif /* CONFIG_ISDN_DIVERSION */
570 break;
571 case ISDN_STAT_DCONN:
572 if (i < 0)
573 return -1;
574 #ifdef ISDN_DEBUG_STATCALLB
575 printk(KERN_DEBUG "DCONN: %ld\n", c->arg);
576 #endif
577 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
578 return 0;
579 /* Find any net-device, waiting for D-channel setup */
580 if (isdn_net_stat_callback(i, c))
581 break;
582 isdn_v110_stat_callback(i, c);
583 /* Find any ttyI, waiting for D-channel setup */
584 if (isdn_tty_stat_callback(i, c)) {
585 cmd.driver = di;
586 cmd.arg = c->arg;
587 cmd.command = ISDN_CMD_ACCEPTB;
588 isdn_command(&cmd);
589 break;
590 }
591 break;
592 case ISDN_STAT_DHUP:
593 if (i < 0)
594 return -1;
595 #ifdef ISDN_DEBUG_STATCALLB
596 printk(KERN_DEBUG "DHUP: %ld\n", c->arg);
597 #endif
598 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
599 return 0;
600 dev->drv[di]->online &= ~(1 << (c->arg));
601 isdn_info_update();
602 /* Signal hangup to network-devices */
603 if (isdn_net_stat_callback(i, c))
604 break;
605 isdn_v110_stat_callback(i, c);
606 if (isdn_tty_stat_callback(i, c))
607 break;
608 #ifdef CONFIG_ISDN_DIVERSION
609 if (divert_if)
610 divert_if->stat_callback(c);
611 #endif /* CONFIG_ISDN_DIVERSION */
612 break;
613 break;
614 case ISDN_STAT_BCONN:
615 if (i < 0)
616 return -1;
617 #ifdef ISDN_DEBUG_STATCALLB
618 printk(KERN_DEBUG "BCONN: %ld\n", c->arg);
619 #endif
620 /* Signal B-channel-connect to network-devices */
621 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
622 return 0;
623 dev->drv[di]->online |= (1 << (c->arg));
624 isdn_info_update();
625 if (isdn_net_stat_callback(i, c))
626 break;
627 isdn_v110_stat_callback(i, c);
628 if (isdn_tty_stat_callback(i, c))
629 break;
630 break;
631 case ISDN_STAT_BHUP:
632 if (i < 0)
633 return -1;
634 #ifdef ISDN_DEBUG_STATCALLB
635 printk(KERN_DEBUG "BHUP: %ld\n", c->arg);
636 #endif
637 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
638 return 0;
639 dev->drv[di]->online &= ~(1 << (c->arg));
640 isdn_info_update();
641 #ifdef CONFIG_ISDN_X25
642 /* Signal hangup to network-devices */
643 if (isdn_net_stat_callback(i, c))
644 break;
645 #endif
646 isdn_v110_stat_callback(i, c);
647 if (isdn_tty_stat_callback(i, c))
648 break;
649 break;
650 case ISDN_STAT_NODCH:
651 if (i < 0)
652 return -1;
653 #ifdef ISDN_DEBUG_STATCALLB
654 printk(KERN_DEBUG "NODCH: %ld\n", c->arg);
655 #endif
656 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
657 return 0;
658 if (isdn_net_stat_callback(i, c))
659 break;
660 if (isdn_tty_stat_callback(i, c))
661 break;
662 break;
663 case ISDN_STAT_ADDCH:
664 spin_lock_irqsave(&dev->lock, flags);
665 if (isdn_add_channels(dev->drv[di], di, c->arg, 1)) {
666 spin_unlock_irqrestore(&dev->lock, flags);
667 return -1;
668 }
669 spin_unlock_irqrestore(&dev->lock, flags);
670 isdn_info_update();
671 break;
672 case ISDN_STAT_DISCH:
673 spin_lock_irqsave(&dev->lock, flags);
674 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
675 if ((dev->drvmap[i] == di) &&
676 (dev->chanmap[i] == c->arg)) {
677 if (c->parm.num[0])
678 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
679 else
680 if (USG_NONE(dev->usage[i])) {
681 dev->usage[i] |= ISDN_USAGE_DISABLED;
682 }
683 else
684 retval = -1;
685 break;
686 }
687 spin_unlock_irqrestore(&dev->lock, flags);
688 isdn_info_update();
689 break;
690 case ISDN_STAT_UNLOAD:
691 while (dev->drv[di]->locks > 0) {
692 isdn_unlock_driver(dev->drv[di]);
693 }
694 spin_lock_irqsave(&dev->lock, flags);
695 isdn_tty_stat_callback(i, c);
696 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
697 if (dev->drvmap[i] == di) {
698 dev->drvmap[i] = -1;
699 dev->chanmap[i] = -1;
700 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
701 }
702 dev->drivers--;
703 dev->channels -= dev->drv[di]->channels;
704 kfree(dev->drv[di]->rcverr);
705 kfree(dev->drv[di]->rcvcount);
706 for (i = 0; i < dev->drv[di]->channels; i++)
707 skb_queue_purge(&dev->drv[di]->rpqueue[i]);
708 kfree(dev->drv[di]->rpqueue);
709 kfree(dev->drv[di]->rcv_waitq);
710 kfree(dev->drv[di]);
711 dev->drv[di] = NULL;
712 dev->drvid[di][0] = '\0';
713 isdn_info_update();
714 set_global_features();
715 spin_unlock_irqrestore(&dev->lock, flags);
716 return 0;
717 case ISDN_STAT_L1ERR:
718 break;
719 case CAPI_PUT_MESSAGE:
720 return(isdn_capi_rec_hl_msg(&c->parm.cmsg));
721 #ifdef CONFIG_ISDN_TTY_FAX
722 case ISDN_STAT_FAXIND:
723 isdn_tty_stat_callback(i, c);
724 break;
725 #endif
726 #ifdef CONFIG_ISDN_AUDIO
727 case ISDN_STAT_AUDIO:
728 isdn_tty_stat_callback(i, c);
729 break;
730 #endif
731 #ifdef CONFIG_ISDN_DIVERSION
732 case ISDN_STAT_PROT:
733 case ISDN_STAT_REDIR:
734 if (divert_if)
735 return(divert_if->stat_callback(c));
736 #endif /* CONFIG_ISDN_DIVERSION */
737 default:
738 return -1;
739 }
740 return 0;
741 }
742
743 /*
744 * Get integer from char-pointer, set pointer to end of number
745 */
746 int
747 isdn_getnum(char **p)
748 {
749 int v = -1;
750
751 while (*p[0] >= '0' && *p[0] <= '9')
752 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0');
753 return v;
754 }
755
756 #define DLE 0x10
757
758 /*
759 * isdn_readbchan() tries to get data from the read-queue.
760 * It MUST be called with interrupts off.
761 *
762 * Be aware that this is not an atomic operation when sleep != 0, even though
763 * interrupts are turned off! Well, like that we are currently only called
764 * on behalf of a read system call on raw device files (which are documented
765 * to be dangerous and for debugging purpose only). The inode semaphore
766 * takes care that this is not called for the same minor device number while
767 * we are sleeping, but access is not serialized against simultaneous read()
768 * from the corresponding ttyI device. Can other ugly events, like changes
769 * of the mapping (di,ch)<->minor, happen during the sleep? --he
770 */
771 int
772 isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, wait_queue_head_t *sleep)
773 {
774 int count;
775 int count_pull;
776 int count_put;
777 int dflag;
778 struct sk_buff *skb;
779 u_char *cp;
780
781 if (!dev->drv[di])
782 return 0;
783 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) {
784 if (sleep)
785 interruptible_sleep_on(sleep);
786 else
787 return 0;
788 }
789 if (len > dev->drv[di]->rcvcount[channel])
790 len = dev->drv[di]->rcvcount[channel];
791 cp = buf;
792 count = 0;
793 while (len) {
794 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
795 break;
796 #ifdef CONFIG_ISDN_AUDIO
797 if (ISDN_AUDIO_SKB_LOCK(skb))
798 break;
799 ISDN_AUDIO_SKB_LOCK(skb) = 1;
800 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
801 char *p = skb->data;
802 unsigned long DLEmask = (1 << channel);
803
804 dflag = 0;
805 count_pull = count_put = 0;
806 while ((count_pull < skb->len) && (len > 0)) {
807 len--;
808 if (dev->drv[di]->DLEflag & DLEmask) {
809 *cp++ = DLE;
810 dev->drv[di]->DLEflag &= ~DLEmask;
811 } else {
812 *cp++ = *p;
813 if (*p == DLE) {
814 dev->drv[di]->DLEflag |= DLEmask;
815 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
816 }
817 p++;
818 count_pull++;
819 }
820 count_put++;
821 }
822 if (count_pull >= skb->len)
823 dflag = 1;
824 } else {
825 #endif
826 /* No DLE's in buff, so simply copy it */
827 dflag = 1;
828 if ((count_pull = skb->len) > len) {
829 count_pull = len;
830 dflag = 0;
831 }
832 count_put = count_pull;
833 skb_copy_from_linear_data(skb, cp, count_put);
834 cp += count_put;
835 len -= count_put;
836 #ifdef CONFIG_ISDN_AUDIO
837 }
838 #endif
839 count += count_put;
840 if (fp) {
841 memset(fp, 0, count_put);
842 fp += count_put;
843 }
844 if (dflag) {
845 /* We got all the data in this buff.
846 * Now we can dequeue it.
847 */
848 if (fp)
849 *(fp - 1) = 0xff;
850 #ifdef CONFIG_ISDN_AUDIO
851 ISDN_AUDIO_SKB_LOCK(skb) = 0;
852 #endif
853 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
854 dev_kfree_skb(skb);
855 } else {
856 /* Not yet emptied this buff, so it
857 * must stay in the queue, for further calls
858 * but we pull off the data we got until now.
859 */
860 skb_pull(skb, count_pull);
861 #ifdef CONFIG_ISDN_AUDIO
862 ISDN_AUDIO_SKB_LOCK(skb) = 0;
863 #endif
864 }
865 dev->drv[di]->rcvcount[channel] -= count_put;
866 }
867 return count;
868 }
869
870 /*
871 * isdn_readbchan_tty() tries to get data from the read-queue.
872 * It MUST be called with interrupts off.
873 *
874 * Be aware that this is not an atomic operation when sleep != 0, even though
875 * interrupts are turned off! Well, like that we are currently only called
876 * on behalf of a read system call on raw device files (which are documented
877 * to be dangerous and for debugging purpose only). The inode semaphore
878 * takes care that this is not called for the same minor device number while
879 * we are sleeping, but access is not serialized against simultaneous read()
880 * from the corresponding ttyI device. Can other ugly events, like changes
881 * of the mapping (di,ch)<->minor, happen during the sleep? --he
882 */
883 int
884 isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
885 {
886 int count;
887 int count_pull;
888 int count_put;
889 int dflag;
890 struct sk_buff *skb;
891 char last = 0;
892 int len;
893
894 if (!dev->drv[di])
895 return 0;
896 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
897 return 0;
898
899 len = tty_buffer_request_room(tty, dev->drv[di]->rcvcount[channel]);
900 if(len == 0)
901 return len;
902
903 count = 0;
904 while (len) {
905 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
906 break;
907 #ifdef CONFIG_ISDN_AUDIO
908 if (ISDN_AUDIO_SKB_LOCK(skb))
909 break;
910 ISDN_AUDIO_SKB_LOCK(skb) = 1;
911 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
912 char *p = skb->data;
913 unsigned long DLEmask = (1 << channel);
914
915 dflag = 0;
916 count_pull = count_put = 0;
917 while ((count_pull < skb->len) && (len > 0)) {
918 /* push every character but the last to the tty buffer directly */
919 if ( count_put )
920 tty_insert_flip_char(tty, last, TTY_NORMAL);
921 len--;
922 if (dev->drv[di]->DLEflag & DLEmask) {
923 last = DLE;
924 dev->drv[di]->DLEflag &= ~DLEmask;
925 } else {
926 last = *p;
927 if (last == DLE) {
928 dev->drv[di]->DLEflag |= DLEmask;
929 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
930 }
931 p++;
932 count_pull++;
933 }
934 count_put++;
935 }
936 if (count_pull >= skb->len)
937 dflag = 1;
938 } else {
939 #endif
940 /* No DLE's in buff, so simply copy it */
941 dflag = 1;
942 if ((count_pull = skb->len) > len) {
943 count_pull = len;
944 dflag = 0;
945 }
946 count_put = count_pull;
947 if(count_put > 1)
948 tty_insert_flip_string(tty, skb->data, count_put - 1);
949 last = skb->data[count_put - 1];
950 len -= count_put;
951 #ifdef CONFIG_ISDN_AUDIO
952 }
953 #endif
954 count += count_put;
955 if (dflag) {
956 /* We got all the data in this buff.
957 * Now we can dequeue it.
958 */
959 if(cisco_hack)
960 tty_insert_flip_char(tty, last, 0xFF);
961 else
962 tty_insert_flip_char(tty, last, TTY_NORMAL);
963 #ifdef CONFIG_ISDN_AUDIO
964 ISDN_AUDIO_SKB_LOCK(skb) = 0;
965 #endif
966 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
967 dev_kfree_skb(skb);
968 } else {
969 tty_insert_flip_char(tty, last, TTY_NORMAL);
970 /* Not yet emptied this buff, so it
971 * must stay in the queue, for further calls
972 * but we pull off the data we got until now.
973 */
974 skb_pull(skb, count_pull);
975 #ifdef CONFIG_ISDN_AUDIO
976 ISDN_AUDIO_SKB_LOCK(skb) = 0;
977 #endif
978 }
979 dev->drv[di]->rcvcount[channel] -= count_put;
980 }
981 return count;
982 }
983
984
985 static inline int
986 isdn_minor2drv(int minor)
987 {
988 return (dev->drvmap[minor]);
989 }
990
991 static inline int
992 isdn_minor2chan(int minor)
993 {
994 return (dev->chanmap[minor]);
995 }
996
997 static char *
998 isdn_statstr(void)
999 {
1000 static char istatbuf[2048];
1001 char *p;
1002 int i;
1003
1004 sprintf(istatbuf, "idmap:\t");
1005 p = istatbuf + strlen(istatbuf);
1006 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1007 sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]);
1008 p = istatbuf + strlen(istatbuf);
1009 }
1010 sprintf(p, "\nchmap:\t");
1011 p = istatbuf + strlen(istatbuf);
1012 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1013 sprintf(p, "%d ", dev->chanmap[i]);
1014 p = istatbuf + strlen(istatbuf);
1015 }
1016 sprintf(p, "\ndrmap:\t");
1017 p = istatbuf + strlen(istatbuf);
1018 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1019 sprintf(p, "%d ", dev->drvmap[i]);
1020 p = istatbuf + strlen(istatbuf);
1021 }
1022 sprintf(p, "\nusage:\t");
1023 p = istatbuf + strlen(istatbuf);
1024 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1025 sprintf(p, "%d ", dev->usage[i]);
1026 p = istatbuf + strlen(istatbuf);
1027 }
1028 sprintf(p, "\nflags:\t");
1029 p = istatbuf + strlen(istatbuf);
1030 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
1031 if (dev->drv[i]) {
1032 sprintf(p, "%ld ", dev->drv[i]->online);
1033 p = istatbuf + strlen(istatbuf);
1034 } else {
1035 sprintf(p, "? ");
1036 p = istatbuf + strlen(istatbuf);
1037 }
1038 }
1039 sprintf(p, "\nphone:\t");
1040 p = istatbuf + strlen(istatbuf);
1041 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1042 sprintf(p, "%s ", dev->num[i]);
1043 p = istatbuf + strlen(istatbuf);
1044 }
1045 sprintf(p, "\n");
1046 return istatbuf;
1047 }
1048
1049 /* Module interface-code */
1050
1051 void
1052 isdn_info_update(void)
1053 {
1054 infostruct *p = dev->infochain;
1055
1056 while (p) {
1057 *(p->private) = 1;
1058 p = (infostruct *) p->next;
1059 }
1060 wake_up_interruptible(&(dev->info_waitq));
1061 }
1062
1063 static ssize_t
1064 isdn_read(struct file *file, char __user *buf, size_t count, loff_t * off)
1065 {
1066 uint minor = iminor(file->f_path.dentry->d_inode);
1067 int len = 0;
1068 int drvidx;
1069 int chidx;
1070 int retval;
1071 char *p;
1072
1073 lock_kernel();
1074 if (minor == ISDN_MINOR_STATUS) {
1075 if (!file->private_data) {
1076 if (file->f_flags & O_NONBLOCK) {
1077 retval = -EAGAIN;
1078 goto out;
1079 }
1080 interruptible_sleep_on(&(dev->info_waitq));
1081 }
1082 p = isdn_statstr();
1083 file->private_data = NULL;
1084 if ((len = strlen(p)) <= count) {
1085 if (copy_to_user(buf, p, len)) {
1086 retval = -EFAULT;
1087 goto out;
1088 }
1089 *off += len;
1090 retval = len;
1091 goto out;
1092 }
1093 retval = 0;
1094 goto out;
1095 }
1096 if (!dev->drivers) {
1097 retval = -ENODEV;
1098 goto out;
1099 }
1100 if (minor <= ISDN_MINOR_BMAX) {
1101 printk(KERN_WARNING "isdn_read minor %d obsolete!\n", minor);
1102 drvidx = isdn_minor2drv(minor);
1103 if (drvidx < 0) {
1104 retval = -ENODEV;
1105 goto out;
1106 }
1107 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1108 retval = -ENODEV;
1109 goto out;
1110 }
1111 chidx = isdn_minor2chan(minor);
1112 if (!(p = kmalloc(count, GFP_KERNEL))) {
1113 retval = -ENOMEM;
1114 goto out;
1115 }
1116 len = isdn_readbchan(drvidx, chidx, p, NULL, count,
1117 &dev->drv[drvidx]->rcv_waitq[chidx]);
1118 *off += len;
1119 if (copy_to_user(buf,p,len))
1120 len = -EFAULT;
1121 kfree(p);
1122 retval = len;
1123 goto out;
1124 }
1125 if (minor <= ISDN_MINOR_CTRLMAX) {
1126 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1127 if (drvidx < 0) {
1128 retval = -ENODEV;
1129 goto out;
1130 }
1131 if (!dev->drv[drvidx]->stavail) {
1132 if (file->f_flags & O_NONBLOCK) {
1133 retval = -EAGAIN;
1134 goto out;
1135 }
1136 interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq));
1137 }
1138 if (dev->drv[drvidx]->interface->readstat) {
1139 if (count > dev->drv[drvidx]->stavail)
1140 count = dev->drv[drvidx]->stavail;
1141 len = dev->drv[drvidx]->interface->readstat(buf, count,
1142 drvidx, isdn_minor2chan(minor - ISDN_MINOR_CTRL));
1143 if (len < 0) {
1144 retval = len;
1145 goto out;
1146 }
1147 } else {
1148 len = 0;
1149 }
1150 if (len)
1151 dev->drv[drvidx]->stavail -= len;
1152 else
1153 dev->drv[drvidx]->stavail = 0;
1154 *off += len;
1155 retval = len;
1156 goto out;
1157 }
1158 #ifdef CONFIG_ISDN_PPP
1159 if (minor <= ISDN_MINOR_PPPMAX) {
1160 retval = isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count);
1161 goto out;
1162 }
1163 #endif
1164 retval = -ENODEV;
1165 out:
1166 unlock_kernel();
1167 return retval;
1168 }
1169
1170 static ssize_t
1171 isdn_write(struct file *file, const char __user *buf, size_t count, loff_t * off)
1172 {
1173 uint minor = iminor(file->f_path.dentry->d_inode);
1174 int drvidx;
1175 int chidx;
1176 int retval;
1177
1178 if (minor == ISDN_MINOR_STATUS)
1179 return -EPERM;
1180 if (!dev->drivers)
1181 return -ENODEV;
1182
1183 lock_kernel();
1184 if (minor <= ISDN_MINOR_BMAX) {
1185 printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor);
1186 drvidx = isdn_minor2drv(minor);
1187 if (drvidx < 0) {
1188 retval = -ENODEV;
1189 goto out;
1190 }
1191 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1192 retval = -ENODEV;
1193 goto out;
1194 }
1195 chidx = isdn_minor2chan(minor);
1196 while ((retval = isdn_writebuf_stub(drvidx, chidx, buf, count)) == 0)
1197 interruptible_sleep_on(&dev->drv[drvidx]->snd_waitq[chidx]);
1198 goto out;
1199 }
1200 if (minor <= ISDN_MINOR_CTRLMAX) {
1201 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1202 if (drvidx < 0) {
1203 retval = -ENODEV;
1204 goto out;
1205 }
1206 /*
1207 * We want to use the isdnctrl device to load the firmware
1208 *
1209 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1210 return -ENODEV;
1211 */
1212 if (dev->drv[drvidx]->interface->writecmd)
1213 retval = dev->drv[drvidx]->interface->
1214 writecmd(buf, count, drvidx,
1215 isdn_minor2chan(minor - ISDN_MINOR_CTRL));
1216 else
1217 retval = count;
1218 goto out;
1219 }
1220 #ifdef CONFIG_ISDN_PPP
1221 if (minor <= ISDN_MINOR_PPPMAX) {
1222 retval = isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count);
1223 goto out;
1224 }
1225 #endif
1226 retval = -ENODEV;
1227 out:
1228 unlock_kernel();
1229 return retval;
1230 }
1231
1232 static unsigned int
1233 isdn_poll(struct file *file, poll_table * wait)
1234 {
1235 unsigned int mask = 0;
1236 unsigned int minor = iminor(file->f_path.dentry->d_inode);
1237 int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1238
1239 lock_kernel();
1240 if (minor == ISDN_MINOR_STATUS) {
1241 poll_wait(file, &(dev->info_waitq), wait);
1242 /* mask = POLLOUT | POLLWRNORM; */
1243 if (file->private_data) {
1244 mask |= POLLIN | POLLRDNORM;
1245 }
1246 goto out;
1247 }
1248 if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
1249 if (drvidx < 0) {
1250 /* driver deregistered while file open */
1251 mask = POLLHUP;
1252 goto out;
1253 }
1254 poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
1255 mask = POLLOUT | POLLWRNORM;
1256 if (dev->drv[drvidx]->stavail) {
1257 mask |= POLLIN | POLLRDNORM;
1258 }
1259 goto out;
1260 }
1261 #ifdef CONFIG_ISDN_PPP
1262 if (minor <= ISDN_MINOR_PPPMAX) {
1263 mask = isdn_ppp_poll(file, wait);
1264 goto out;
1265 }
1266 #endif
1267 mask = POLLERR;
1268 out:
1269 unlock_kernel();
1270 return mask;
1271 }
1272
1273
1274 static int
1275 isdn_ioctl(struct file *file, uint cmd, ulong arg)
1276 {
1277 uint minor = iminor(file->f_path.dentry->d_inode);
1278 isdn_ctrl c;
1279 int drvidx;
1280 int chidx;
1281 int ret;
1282 int i;
1283 char __user *p;
1284 char *s;
1285 union iocpar {
1286 char name[10];
1287 char bname[22];
1288 isdn_ioctl_struct iocts;
1289 isdn_net_ioctl_phone phone;
1290 isdn_net_ioctl_cfg cfg;
1291 } iocpar;
1292 void __user *argp = (void __user *)arg;
1293
1294 #define name iocpar.name
1295 #define bname iocpar.bname
1296 #define iocts iocpar.iocts
1297 #define phone iocpar.phone
1298 #define cfg iocpar.cfg
1299
1300 if (minor == ISDN_MINOR_STATUS) {
1301 switch (cmd) {
1302 case IIOCGETDVR:
1303 return (TTY_DV +
1304 (NET_DV << 8) +
1305 (INF_DV << 16));
1306 case IIOCGETCPS:
1307 if (arg) {
1308 ulong __user *p = argp;
1309 int i;
1310 if (!access_ok(VERIFY_WRITE, p,
1311 sizeof(ulong) * ISDN_MAX_CHANNELS * 2))
1312 return -EFAULT;
1313 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1314 put_user(dev->ibytes[i], p++);
1315 put_user(dev->obytes[i], p++);
1316 }
1317 return 0;
1318 } else
1319 return -EINVAL;
1320 break;
1321 #ifdef CONFIG_NETDEVICES
1322 case IIOCNETGPN:
1323 /* Get peer phone number of a connected
1324 * isdn network interface */
1325 if (arg) {
1326 if (copy_from_user(&phone, argp, sizeof(phone)))
1327 return -EFAULT;
1328 return isdn_net_getpeer(&phone, argp);
1329 } else
1330 return -EINVAL;
1331 #endif
1332 default:
1333 return -EINVAL;
1334 }
1335 }
1336 if (!dev->drivers)
1337 return -ENODEV;
1338 if (minor <= ISDN_MINOR_BMAX) {
1339 drvidx = isdn_minor2drv(minor);
1340 if (drvidx < 0)
1341 return -ENODEV;
1342 chidx = isdn_minor2chan(minor);
1343 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1344 return -ENODEV;
1345 return 0;
1346 }
1347 if (minor <= ISDN_MINOR_CTRLMAX) {
1348 /*
1349 * isdn net devices manage lots of configuration variables as linked lists.
1350 * Those lists must only be manipulated from user space. Some of the ioctl's
1351 * service routines access user space and are not atomic. Therefore, ioctl's
1352 * manipulating the lists and ioctl's sleeping while accessing the lists
1353 * are serialized by means of a semaphore.
1354 */
1355 switch (cmd) {
1356 case IIOCNETDWRSET:
1357 printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
1358 return(-EINVAL);
1359 case IIOCNETLCR:
1360 printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
1361 return -ENODEV;
1362 #ifdef CONFIG_NETDEVICES
1363 case IIOCNETAIF:
1364 /* Add a network-interface */
1365 if (arg) {
1366 if (copy_from_user(name, argp, sizeof(name)))
1367 return -EFAULT;
1368 s = name;
1369 } else {
1370 s = NULL;
1371 }
1372 ret = mutex_lock_interruptible(&dev->mtx);
1373 if( ret ) return ret;
1374 if ((s = isdn_net_new(s, NULL))) {
1375 if (copy_to_user(argp, s, strlen(s) + 1)){
1376 ret = -EFAULT;
1377 } else {
1378 ret = 0;
1379 }
1380 } else
1381 ret = -ENODEV;
1382 mutex_unlock(&dev->mtx);
1383 return ret;
1384 case IIOCNETASL:
1385 /* Add a slave to a network-interface */
1386 if (arg) {
1387 if (copy_from_user(bname, argp, sizeof(bname) - 1))
1388 return -EFAULT;
1389 } else
1390 return -EINVAL;
1391 ret = mutex_lock_interruptible(&dev->mtx);
1392 if( ret ) return ret;
1393 if ((s = isdn_net_newslave(bname))) {
1394 if (copy_to_user(argp, s, strlen(s) + 1)){
1395 ret = -EFAULT;
1396 } else {
1397 ret = 0;
1398 }
1399 } else
1400 ret = -ENODEV;
1401 mutex_unlock(&dev->mtx);
1402 return ret;
1403 case IIOCNETDIF:
1404 /* Delete a network-interface */
1405 if (arg) {
1406 if (copy_from_user(name, argp, sizeof(name)))
1407 return -EFAULT;
1408 ret = mutex_lock_interruptible(&dev->mtx);
1409 if( ret ) return ret;
1410 ret = isdn_net_rm(name);
1411 mutex_unlock(&dev->mtx);
1412 return ret;
1413 } else
1414 return -EINVAL;
1415 case IIOCNETSCF:
1416 /* Set configurable parameters of a network-interface */
1417 if (arg) {
1418 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1419 return -EFAULT;
1420 return isdn_net_setcfg(&cfg);
1421 } else
1422 return -EINVAL;
1423 case IIOCNETGCF:
1424 /* Get configurable parameters of a network-interface */
1425 if (arg) {
1426 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1427 return -EFAULT;
1428 if (!(ret = isdn_net_getcfg(&cfg))) {
1429 if (copy_to_user(argp, &cfg, sizeof(cfg)))
1430 return -EFAULT;
1431 }
1432 return ret;
1433 } else
1434 return -EINVAL;
1435 case IIOCNETANM:
1436 /* Add a phone-number to a network-interface */
1437 if (arg) {
1438 if (copy_from_user(&phone, argp, sizeof(phone)))
1439 return -EFAULT;
1440 ret = mutex_lock_interruptible(&dev->mtx);
1441 if( ret ) return ret;
1442 ret = isdn_net_addphone(&phone);
1443 mutex_unlock(&dev->mtx);
1444 return ret;
1445 } else
1446 return -EINVAL;
1447 case IIOCNETGNM:
1448 /* Get list of phone-numbers of a network-interface */
1449 if (arg) {
1450 if (copy_from_user(&phone, argp, sizeof(phone)))
1451 return -EFAULT;
1452 ret = mutex_lock_interruptible(&dev->mtx);
1453 if( ret ) return ret;
1454 ret = isdn_net_getphones(&phone, argp);
1455 mutex_unlock(&dev->mtx);
1456 return ret;
1457 } else
1458 return -EINVAL;
1459 case IIOCNETDNM:
1460 /* Delete a phone-number of a network-interface */
1461 if (arg) {
1462 if (copy_from_user(&phone, argp, sizeof(phone)))
1463 return -EFAULT;
1464 ret = mutex_lock_interruptible(&dev->mtx);
1465 if( ret ) return ret;
1466 ret = isdn_net_delphone(&phone);
1467 mutex_unlock(&dev->mtx);
1468 return ret;
1469 } else
1470 return -EINVAL;
1471 case IIOCNETDIL:
1472 /* Force dialing of a network-interface */
1473 if (arg) {
1474 if (copy_from_user(name, argp, sizeof(name)))
1475 return -EFAULT;
1476 return isdn_net_force_dial(name);
1477 } else
1478 return -EINVAL;
1479 #ifdef CONFIG_ISDN_PPP
1480 case IIOCNETALN:
1481 if (!arg)
1482 return -EINVAL;
1483 if (copy_from_user(name, argp, sizeof(name)))
1484 return -EFAULT;
1485 return isdn_ppp_dial_slave(name);
1486 case IIOCNETDLN:
1487 if (!arg)
1488 return -EINVAL;
1489 if (copy_from_user(name, argp, sizeof(name)))
1490 return -EFAULT;
1491 return isdn_ppp_hangup_slave(name);
1492 #endif
1493 case IIOCNETHUP:
1494 /* Force hangup of a network-interface */
1495 if (!arg)
1496 return -EINVAL;
1497 if (copy_from_user(name, argp, sizeof(name)))
1498 return -EFAULT;
1499 return isdn_net_force_hangup(name);
1500 break;
1501 #endif /* CONFIG_NETDEVICES */
1502 case IIOCSETVER:
1503 dev->net_verbose = arg;
1504 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1505 return 0;
1506 case IIOCSETGST:
1507 if (arg)
1508 dev->global_flags |= ISDN_GLOBAL_STOPPED;
1509 else
1510 dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1511 printk(KERN_INFO "isdn: Global Mode %s\n",
1512 (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1513 return 0;
1514 case IIOCSETBRJ:
1515 drvidx = -1;
1516 if (arg) {
1517 int i;
1518 char *p;
1519 if (copy_from_user(&iocts, argp,
1520 sizeof(isdn_ioctl_struct)))
1521 return -EFAULT;
1522 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1523 if (strlen(iocts.drvid)) {
1524 if ((p = strchr(iocts.drvid, ',')))
1525 *p = 0;
1526 drvidx = -1;
1527 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1528 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1529 drvidx = i;
1530 break;
1531 }
1532 }
1533 }
1534 if (drvidx == -1)
1535 return -ENODEV;
1536 if (iocts.arg)
1537 dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
1538 else
1539 dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
1540 return 0;
1541 case IIOCSIGPRF:
1542 dev->profd = current;
1543 return 0;
1544 break;
1545 case IIOCGETPRF:
1546 /* Get all Modem-Profiles */
1547 if (arg) {
1548 char __user *p = argp;
1549 int i;
1550
1551 if (!access_ok(VERIFY_WRITE, argp,
1552 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1553 * ISDN_MAX_CHANNELS))
1554 return -EFAULT;
1555
1556 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1557 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1558 ISDN_MODEM_NUMREG))
1559 return -EFAULT;
1560 p += ISDN_MODEM_NUMREG;
1561 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1562 return -EFAULT;
1563 p += ISDN_MSNLEN;
1564 if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
1565 return -EFAULT;
1566 p += ISDN_LMSNLEN;
1567 }
1568 return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
1569 } else
1570 return -EINVAL;
1571 break;
1572 case IIOCSETPRF:
1573 /* Set all Modem-Profiles */
1574 if (arg) {
1575 char __user *p = argp;
1576 int i;
1577
1578 if (!access_ok(VERIFY_READ, argp,
1579 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1580 * ISDN_MAX_CHANNELS))
1581 return -EFAULT;
1582
1583 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1584 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1585 ISDN_MODEM_NUMREG))
1586 return -EFAULT;
1587 p += ISDN_MODEM_NUMREG;
1588 if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
1589 return -EFAULT;
1590 p += ISDN_LMSNLEN;
1591 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1592 return -EFAULT;
1593 p += ISDN_MSNLEN;
1594 }
1595 return 0;
1596 } else
1597 return -EINVAL;
1598 break;
1599 case IIOCSETMAP:
1600 case IIOCGETMAP:
1601 /* Set/Get MSN->EAZ-Mapping for a driver */
1602 if (arg) {
1603
1604 if (copy_from_user(&iocts, argp,
1605 sizeof(isdn_ioctl_struct)))
1606 return -EFAULT;
1607 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1608 if (strlen(iocts.drvid)) {
1609 drvidx = -1;
1610 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1611 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1612 drvidx = i;
1613 break;
1614 }
1615 } else
1616 drvidx = 0;
1617 if (drvidx == -1)
1618 return -ENODEV;
1619 if (cmd == IIOCSETMAP) {
1620 int loop = 1;
1621
1622 p = (char __user *) iocts.arg;
1623 i = 0;
1624 while (loop) {
1625 int j = 0;
1626
1627 while (1) {
1628 if (!access_ok(VERIFY_READ, p, 1))
1629 return -EFAULT;
1630 get_user(bname[j], p++);
1631 switch (bname[j]) {
1632 case '\0':
1633 loop = 0;
1634 /* Fall through */
1635 case ',':
1636 bname[j] = '\0';
1637 strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
1638 j = ISDN_MSNLEN;
1639 break;
1640 default:
1641 j++;
1642 }
1643 if (j >= ISDN_MSNLEN)
1644 break;
1645 }
1646 if (++i > 9)
1647 break;
1648 }
1649 } else {
1650 p = (char __user *) iocts.arg;
1651 for (i = 0; i < 10; i++) {
1652 snprintf(bname, sizeof(bname), "%s%s",
1653 strlen(dev->drv[drvidx]->msn2eaz[i]) ?
1654 dev->drv[drvidx]->msn2eaz[i] : "_",
1655 (i < 9) ? "," : "\0");
1656 if (copy_to_user(p, bname, strlen(bname) + 1))
1657 return -EFAULT;
1658 p += strlen(bname);
1659 }
1660 }
1661 return 0;
1662 } else
1663 return -EINVAL;
1664 case IIOCDBGVAR:
1665 if (arg) {
1666 if (copy_to_user(argp, &dev, sizeof(ulong)))
1667 return -EFAULT;
1668 return 0;
1669 } else
1670 return -EINVAL;
1671 break;
1672 default:
1673 if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
1674 cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
1675 else
1676 return -EINVAL;
1677 if (arg) {
1678 int i;
1679 char *p;
1680 if (copy_from_user(&iocts, argp, sizeof(isdn_ioctl_struct)))
1681 return -EFAULT;
1682 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1683 if (strlen(iocts.drvid)) {
1684 if ((p = strchr(iocts.drvid, ',')))
1685 *p = 0;
1686 drvidx = -1;
1687 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1688 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1689 drvidx = i;
1690 break;
1691 }
1692 } else
1693 drvidx = 0;
1694 if (drvidx == -1)
1695 return -ENODEV;
1696 if (!access_ok(VERIFY_WRITE, argp,
1697 sizeof(isdn_ioctl_struct)))
1698 return -EFAULT;
1699 c.driver = drvidx;
1700 c.command = ISDN_CMD_IOCTL;
1701 c.arg = cmd;
1702 memcpy(c.parm.num, &iocts.arg, sizeof(ulong));
1703 ret = isdn_command(&c);
1704 memcpy(&iocts.arg, c.parm.num, sizeof(ulong));
1705 if (copy_to_user(argp, &iocts, sizeof(isdn_ioctl_struct)))
1706 return -EFAULT;
1707 return ret;
1708 } else
1709 return -EINVAL;
1710 }
1711 }
1712 #ifdef CONFIG_ISDN_PPP
1713 if (minor <= ISDN_MINOR_PPPMAX)
1714 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1715 #endif
1716 return -ENODEV;
1717
1718 #undef name
1719 #undef bname
1720 #undef iocts
1721 #undef phone
1722 #undef cfg
1723 }
1724
1725 static long
1726 isdn_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1727 {
1728 int ret;
1729
1730 lock_kernel();
1731 ret = isdn_ioctl(file, cmd, arg);
1732 unlock_kernel();
1733
1734 return ret;
1735 }
1736
1737 /*
1738 * Open the device code.
1739 */
1740 static int
1741 isdn_open(struct inode *ino, struct file *filep)
1742 {
1743 uint minor = iminor(ino);
1744 int drvidx;
1745 int chidx;
1746 int retval = -ENODEV;
1747
1748 lock_kernel();
1749 if (minor == ISDN_MINOR_STATUS) {
1750 infostruct *p;
1751
1752 if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1753 p->next = (char *) dev->infochain;
1754 p->private = (char *) &(filep->private_data);
1755 dev->infochain = p;
1756 /* At opening we allow a single update */
1757 filep->private_data = (char *) 1;
1758 retval = 0;
1759 goto out;
1760 } else {
1761 retval = -ENOMEM;
1762 goto out;
1763 }
1764 }
1765 if (!dev->channels)
1766 goto out;
1767 if (minor <= ISDN_MINOR_BMAX) {
1768 printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
1769 drvidx = isdn_minor2drv(minor);
1770 if (drvidx < 0)
1771 goto out;
1772 chidx = isdn_minor2chan(minor);
1773 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1774 goto out;
1775 if (!(dev->drv[drvidx]->online & (1 << chidx)))
1776 goto out;
1777 isdn_lock_drivers();
1778 retval = 0;
1779 goto out;
1780 }
1781 if (minor <= ISDN_MINOR_CTRLMAX) {
1782 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1783 if (drvidx < 0)
1784 goto out;
1785 isdn_lock_drivers();
1786 retval = 0;
1787 goto out;
1788 }
1789 #ifdef CONFIG_ISDN_PPP
1790 if (minor <= ISDN_MINOR_PPPMAX) {
1791 retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
1792 if (retval == 0)
1793 isdn_lock_drivers();
1794 goto out;
1795 }
1796 #endif
1797 out:
1798 nonseekable_open(ino, filep);
1799 unlock_kernel();
1800 return retval;
1801 }
1802
1803 static int
1804 isdn_close(struct inode *ino, struct file *filep)
1805 {
1806 uint minor = iminor(ino);
1807
1808 lock_kernel();
1809 if (minor == ISDN_MINOR_STATUS) {
1810 infostruct *p = dev->infochain;
1811 infostruct *q = NULL;
1812
1813 while (p) {
1814 if (p->private == (char *) &(filep->private_data)) {
1815 if (q)
1816 q->next = p->next;
1817 else
1818 dev->infochain = (infostruct *) (p->next);
1819 kfree(p);
1820 goto out;
1821 }
1822 q = p;
1823 p = (infostruct *) (p->next);
1824 }
1825 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1826 goto out;
1827 }
1828 isdn_unlock_drivers();
1829 if (minor <= ISDN_MINOR_BMAX)
1830 goto out;
1831 if (minor <= ISDN_MINOR_CTRLMAX) {
1832 if (dev->profd == current)
1833 dev->profd = NULL;
1834 goto out;
1835 }
1836 #ifdef CONFIG_ISDN_PPP
1837 if (minor <= ISDN_MINOR_PPPMAX)
1838 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1839 #endif
1840
1841 out:
1842 unlock_kernel();
1843 return 0;
1844 }
1845
1846 static const struct file_operations isdn_fops =
1847 {
1848 .owner = THIS_MODULE,
1849 .llseek = no_llseek,
1850 .read = isdn_read,
1851 .write = isdn_write,
1852 .poll = isdn_poll,
1853 .unlocked_ioctl = isdn_unlocked_ioctl,
1854 .open = isdn_open,
1855 .release = isdn_close,
1856 };
1857
1858 char *
1859 isdn_map_eaz2msn(char *msn, int di)
1860 {
1861 isdn_driver_t *this = dev->drv[di];
1862 int i;
1863
1864 if (strlen(msn) == 1) {
1865 i = msn[0] - '0';
1866 if ((i >= 0) && (i <= 9))
1867 if (strlen(this->msn2eaz[i]))
1868 return (this->msn2eaz[i]);
1869 }
1870 return (msn);
1871 }
1872
1873 /*
1874 * Find an unused ISDN-channel, whose feature-flags match the
1875 * given L2- and L3-protocols.
1876 */
1877 #define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038))
1878
1879 /*
1880 * This function must be called with holding the dev->lock.
1881 */
1882 int
1883 isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1884 ,int pre_chan, char *msn)
1885 {
1886 int i;
1887 ulong features;
1888 ulong vfeatures;
1889
1890 features = ((1 << l2_proto) | (0x10000 << l3_proto));
1891 vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1892 ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038));
1893 /* If Layer-2 protocol is V.110, accept drivers with
1894 * transparent feature even if these don't support V.110
1895 * because we can emulate this in linklevel.
1896 */
1897 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1898 if (USG_NONE(dev->usage[i]) &&
1899 (dev->drvmap[i] != -1)) {
1900 int d = dev->drvmap[i];
1901 if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1902 ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1903 continue;
1904 if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
1905 continue;
1906 if (dev->usage[i] & ISDN_USAGE_DISABLED)
1907 continue; /* usage not allowed */
1908 if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
1909 if (((dev->drv[d]->interface->features & features) == features) ||
1910 (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1911 (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1912 if ((pre_dev < 0) || (pre_chan < 0)) {
1913 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1914 dev->usage[i] |= usage;
1915 isdn_info_update();
1916 return i;
1917 } else {
1918 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1919 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1920 dev->usage[i] |= usage;
1921 isdn_info_update();
1922 return i;
1923 }
1924 }
1925 }
1926 }
1927 }
1928 return -1;
1929 }
1930
1931 /*
1932 * Set state of ISDN-channel to 'unused'
1933 */
1934 void
1935 isdn_free_channel(int di, int ch, int usage)
1936 {
1937 int i;
1938
1939 if ((di < 0) || (ch < 0)) {
1940 printk(KERN_WARNING "%s: called with invalid drv(%d) or channel(%d)\n",
1941 __func__, di, ch);
1942 return;
1943 }
1944 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1945 if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
1946 (dev->drvmap[i] == di) &&
1947 (dev->chanmap[i] == ch)) {
1948 dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1949 strcpy(dev->num[i], "???");
1950 dev->ibytes[i] = 0;
1951 dev->obytes[i] = 0;
1952 // 20.10.99 JIM, try to reinitialize v110 !
1953 dev->v110emu[i] = 0;
1954 atomic_set(&(dev->v110use[i]), 0);
1955 isdn_v110_close(dev->v110[i]);
1956 dev->v110[i] = NULL;
1957 // 20.10.99 JIM, try to reinitialize v110 !
1958 isdn_info_update();
1959 if (dev->drv[di])
1960 skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
1961 }
1962 }
1963
1964 /*
1965 * Cancel Exclusive-Flag for ISDN-channel
1966 */
1967 void
1968 isdn_unexclusive_channel(int di, int ch)
1969 {
1970 int i;
1971
1972 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1973 if ((dev->drvmap[i] == di) &&
1974 (dev->chanmap[i] == ch)) {
1975 dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1976 isdn_info_update();
1977 return;
1978 }
1979 }
1980
1981 /*
1982 * writebuf replacement for SKB_ABLE drivers
1983 */
1984 static int
1985 isdn_writebuf_stub(int drvidx, int chan, const u_char __user * buf, int len)
1986 {
1987 int ret;
1988 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1989 struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1990
1991 if (!skb)
1992 return -ENOMEM;
1993 skb_reserve(skb, hl);
1994 if (copy_from_user(skb_put(skb, len), buf, len)) {
1995 dev_kfree_skb(skb);
1996 return -EFAULT;
1997 }
1998 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
1999 if (ret <= 0)
2000 dev_kfree_skb(skb);
2001 if (ret > 0)
2002 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
2003 return ret;
2004 }
2005
2006 /*
2007 * Return: length of data on success, -ERRcode on failure.
2008 */
2009 int
2010 isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
2011 {
2012 int ret;
2013 struct sk_buff *nskb = NULL;
2014 int v110_ret = skb->len;
2015 int idx = isdn_dc2minor(drvidx, chan);
2016
2017 if (dev->v110[idx]) {
2018 atomic_inc(&dev->v110use[idx]);
2019 nskb = isdn_v110_encode(dev->v110[idx], skb);
2020 atomic_dec(&dev->v110use[idx]);
2021 if (!nskb)
2022 return 0;
2023 v110_ret = *((int *)nskb->data);
2024 skb_pull(nskb, sizeof(int));
2025 if (!nskb->len) {
2026 dev_kfree_skb(nskb);
2027 return v110_ret;
2028 }
2029 /* V.110 must always be acknowledged */
2030 ack = 1;
2031 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
2032 } else {
2033 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
2034
2035 if( skb_headroom(skb) < hl ){
2036 /*
2037 * This should only occur when new HL driver with
2038 * increased hl_hdrlen was loaded after netdevice
2039 * was created and connected to the new driver.
2040 *
2041 * The V.110 branch (re-allocates on its own) does
2042 * not need this
2043 */
2044 struct sk_buff * skb_tmp;
2045
2046 skb_tmp = skb_realloc_headroom(skb, hl);
2047 printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
2048 if (!skb_tmp) return -ENOMEM; /* 0 better? */
2049 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
2050 if( ret > 0 ){
2051 dev_kfree_skb(skb);
2052 } else {
2053 dev_kfree_skb(skb_tmp);
2054 }
2055 } else {
2056 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
2057 }
2058 }
2059 if (ret > 0) {
2060 dev->obytes[idx] += ret;
2061 if (dev->v110[idx]) {
2062 atomic_inc(&dev->v110use[idx]);
2063 dev->v110[idx]->skbuser++;
2064 atomic_dec(&dev->v110use[idx]);
2065 /* For V.110 return unencoded data length */
2066 ret = v110_ret;
2067 /* if the complete frame was send we free the skb;
2068 if not upper function will requeue the skb */
2069 if (ret == skb->len)
2070 dev_kfree_skb(skb);
2071 }
2072 } else
2073 if (dev->v110[idx])
2074 dev_kfree_skb(nskb);
2075 return ret;
2076 }
2077
2078 static int
2079 isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
2080 {
2081 int j, k, m;
2082
2083 init_waitqueue_head(&d->st_waitq);
2084 if (d->flags & DRV_FLAG_RUNNING)
2085 return -1;
2086 if (n < 1) return 0;
2087
2088 m = (adding) ? d->channels + n : n;
2089
2090 if (dev->channels + n > ISDN_MAX_CHANNELS) {
2091 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
2092 ISDN_MAX_CHANNELS);
2093 return -1;
2094 }
2095
2096 if ((adding) && (d->rcverr))
2097 kfree(d->rcverr);
2098 if (!(d->rcverr = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2099 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
2100 return -1;
2101 }
2102
2103 if ((adding) && (d->rcvcount))
2104 kfree(d->rcvcount);
2105 if (!(d->rcvcount = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2106 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
2107 if (!adding)
2108 kfree(d->rcverr);
2109 return -1;
2110 }
2111
2112 if ((adding) && (d->rpqueue)) {
2113 for (j = 0; j < d->channels; j++)
2114 skb_queue_purge(&d->rpqueue[j]);
2115 kfree(d->rpqueue);
2116 }
2117 if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_ATOMIC))) {
2118 printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
2119 if (!adding) {
2120 kfree(d->rcvcount);
2121 kfree(d->rcverr);
2122 }
2123 return -1;
2124 }
2125 for (j = 0; j < m; j++) {
2126 skb_queue_head_init(&d->rpqueue[j]);
2127 }
2128
2129 if ((adding) && (d->rcv_waitq))
2130 kfree(d->rcv_waitq);
2131 d->rcv_waitq = kmalloc(sizeof(wait_queue_head_t) * 2 * m, GFP_ATOMIC);
2132 if (!d->rcv_waitq) {
2133 printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
2134 if (!adding) {
2135 kfree(d->rpqueue);
2136 kfree(d->rcvcount);
2137 kfree(d->rcverr);
2138 }
2139 return -1;
2140 }
2141 d->snd_waitq = d->rcv_waitq + m;
2142 for (j = 0; j < m; j++) {
2143 init_waitqueue_head(&d->rcv_waitq[j]);
2144 init_waitqueue_head(&d->snd_waitq[j]);
2145 }
2146
2147 dev->channels += n;
2148 for (j = d->channels; j < m; j++)
2149 for (k = 0; k < ISDN_MAX_CHANNELS; k++)
2150 if (dev->chanmap[k] < 0) {
2151 dev->chanmap[k] = j;
2152 dev->drvmap[k] = drvidx;
2153 break;
2154 }
2155 d->channels = m;
2156 return 0;
2157 }
2158
2159 /*
2160 * Low-level-driver registration
2161 */
2162
2163 static void
2164 set_global_features(void)
2165 {
2166 int drvidx;
2167
2168 dev->global_features = 0;
2169 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
2170 if (!dev->drv[drvidx])
2171 continue;
2172 if (dev->drv[drvidx]->interface)
2173 dev->global_features |= dev->drv[drvidx]->interface->features;
2174 }
2175 }
2176
2177 #ifdef CONFIG_ISDN_DIVERSION
2178
2179 static char *map_drvname(int di)
2180 {
2181 if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
2182 return(NULL);
2183 return(dev->drvid[di]); /* driver name */
2184 } /* map_drvname */
2185
2186 static int map_namedrv(char *id)
2187 { int i;
2188
2189 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2190 { if (!strcmp(dev->drvid[i],id))
2191 return(i);
2192 }
2193 return(-1);
2194 } /* map_namedrv */
2195
2196 int DIVERT_REG_NAME(isdn_divert_if *i_div)
2197 {
2198 if (i_div->if_magic != DIVERT_IF_MAGIC)
2199 return(DIVERT_VER_ERR);
2200 switch (i_div->cmd)
2201 {
2202 case DIVERT_CMD_REL:
2203 if (divert_if != i_div)
2204 return(DIVERT_REL_ERR);
2205 divert_if = NULL; /* free interface */
2206 return(DIVERT_NO_ERR);
2207
2208 case DIVERT_CMD_REG:
2209 if (divert_if)
2210 return(DIVERT_REG_ERR);
2211 i_div->ll_cmd = isdn_command; /* set command function */
2212 i_div->drv_to_name = map_drvname;
2213 i_div->name_to_drv = map_namedrv;
2214 divert_if = i_div; /* remember interface */
2215 return(DIVERT_NO_ERR);
2216
2217 default:
2218 return(DIVERT_CMD_ERR);
2219 }
2220 } /* DIVERT_REG_NAME */
2221
2222 EXPORT_SYMBOL(DIVERT_REG_NAME);
2223
2224 #endif /* CONFIG_ISDN_DIVERSION */
2225
2226
2227 EXPORT_SYMBOL(register_isdn);
2228 #ifdef CONFIG_ISDN_PPP
2229 EXPORT_SYMBOL(isdn_ppp_register_compressor);
2230 EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
2231 #endif
2232
2233 int
2234 register_isdn(isdn_if * i)
2235 {
2236 isdn_driver_t *d;
2237 int j;
2238 ulong flags;
2239 int drvidx;
2240
2241 if (dev->drivers >= ISDN_MAX_DRIVERS) {
2242 printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
2243 ISDN_MAX_DRIVERS);
2244 return 0;
2245 }
2246 if (!i->writebuf_skb) {
2247 printk(KERN_WARNING "register_isdn: No write routine given.\n");
2248 return 0;
2249 }
2250 if (!(d = kzalloc(sizeof(isdn_driver_t), GFP_KERNEL))) {
2251 printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
2252 return 0;
2253 }
2254
2255 d->maxbufsize = i->maxbufsize;
2256 d->pktcount = 0;
2257 d->stavail = 0;
2258 d->flags = DRV_FLAG_LOADED;
2259 d->online = 0;
2260 d->interface = i;
2261 d->channels = 0;
2262 spin_lock_irqsave(&dev->lock, flags);
2263 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2264 if (!dev->drv[drvidx])
2265 break;
2266 if (isdn_add_channels(d, drvidx, i->channels, 0)) {
2267 spin_unlock_irqrestore(&dev->lock, flags);
2268 kfree(d);
2269 return 0;
2270 }
2271 i->channels = drvidx;
2272 i->rcvcallb_skb = isdn_receive_skb_callback;
2273 i->statcallb = isdn_status_callback;
2274 if (!strlen(i->id))
2275 sprintf(i->id, "line%d", drvidx);
2276 for (j = 0; j < drvidx; j++)
2277 if (!strcmp(i->id, dev->drvid[j]))
2278 sprintf(i->id, "line%d", drvidx);
2279 dev->drv[drvidx] = d;
2280 strcpy(dev->drvid[drvidx], i->id);
2281 isdn_info_update();
2282 dev->drivers++;
2283 set_global_features();
2284 spin_unlock_irqrestore(&dev->lock, flags);
2285 return 1;
2286 }
2287
2288 /*
2289 *****************************************************************************
2290 * And now the modules code.
2291 *****************************************************************************
2292 */
2293
2294 static char *
2295 isdn_getrev(const char *revision)
2296 {
2297 char *rev;
2298 char *p;
2299
2300 if ((p = strchr(revision, ':'))) {
2301 rev = p + 2;
2302 p = strchr(rev, '$');
2303 *--p = 0;
2304 } else
2305 rev = "???";
2306 return rev;
2307 }
2308
2309 /*
2310 * Allocate and initialize all data, register modem-devices
2311 */
2312 static int __init isdn_init(void)
2313 {
2314 int i;
2315 char tmprev[50];
2316
2317 if (!(dev = vmalloc(sizeof(isdn_dev)))) {
2318 printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
2319 return -EIO;
2320 }
2321 memset((char *) dev, 0, sizeof(isdn_dev));
2322 init_timer(&dev->timer);
2323 dev->timer.function = isdn_timer_funct;
2324 spin_lock_init(&dev->lock);
2325 spin_lock_init(&dev->timerlock);
2326 #ifdef MODULE
2327 dev->owner = THIS_MODULE;
2328 #endif
2329 mutex_init(&dev->mtx);
2330 init_waitqueue_head(&dev->info_waitq);
2331 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2332 dev->drvmap[i] = -1;
2333 dev->chanmap[i] = -1;
2334 dev->m_idx[i] = -1;
2335 strcpy(dev->num[i], "???");
2336 init_waitqueue_head(&dev->mdm.info[i].open_wait);
2337 init_waitqueue_head(&dev->mdm.info[i].close_wait);
2338 }
2339 if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
2340 printk(KERN_WARNING "isdn: Could not register control devices\n");
2341 vfree(dev);
2342 return -EIO;
2343 }
2344 if ((isdn_tty_modem_init()) < 0) {
2345 printk(KERN_WARNING "isdn: Could not register tty devices\n");
2346 vfree(dev);
2347 unregister_chrdev(ISDN_MAJOR, "isdn");
2348 return -EIO;
2349 }
2350 #ifdef CONFIG_ISDN_PPP
2351 if (isdn_ppp_init() < 0) {
2352 printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
2353 isdn_tty_exit();
2354 unregister_chrdev(ISDN_MAJOR, "isdn");
2355 vfree(dev);
2356 return -EIO;
2357 }
2358 #endif /* CONFIG_ISDN_PPP */
2359
2360 strcpy(tmprev, isdn_revision);
2361 printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
2362 strcpy(tmprev, isdn_tty_revision);
2363 printk("%s/", isdn_getrev(tmprev));
2364 strcpy(tmprev, isdn_net_revision);
2365 printk("%s/", isdn_getrev(tmprev));
2366 strcpy(tmprev, isdn_ppp_revision);
2367 printk("%s/", isdn_getrev(tmprev));
2368 strcpy(tmprev, isdn_audio_revision);
2369 printk("%s/", isdn_getrev(tmprev));
2370 strcpy(tmprev, isdn_v110_revision);
2371 printk("%s", isdn_getrev(tmprev));
2372
2373 #ifdef MODULE
2374 printk(" loaded\n");
2375 #else
2376 printk("\n");
2377 #endif
2378 isdn_info_update();
2379 return 0;
2380 }
2381
2382 /*
2383 * Unload module
2384 */
2385 static void __exit isdn_exit(void)
2386 {
2387 #ifdef CONFIG_ISDN_PPP
2388 isdn_ppp_cleanup();
2389 #endif
2390 if (isdn_net_rmall() < 0) {
2391 printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
2392 return;
2393 }
2394 isdn_tty_exit();
2395 unregister_chrdev(ISDN_MAJOR, "isdn");
2396 del_timer(&dev->timer);
2397 /* call vfree with interrupts enabled, else it will hang */
2398 vfree(dev);
2399 printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
2400 }
2401
2402 module_init(isdn_init);
2403 module_exit(isdn_exit);
Linux with added FPC-III support