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[PATCH] drivers/isdn/isdnloop: save_flags()/cli(), restore_flags() replaced appropriately
[deliverable/linux.git] / drivers / isdn / i4l / isdn_common.c
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1da177e4
LT		 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
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/init.h>
1da177e4
LT		 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
38MODULE_DESCRIPTION("ISDN4Linux: link layer");
39MODULE_AUTHOR("Fritz Elfert");
40MODULE_LICENSE("GPL");
41
42isdn_dev *dev;
43
44static char *isdn_revision = "$Revision: 1.1.2.3 $";
45
46extern char *isdn_net_revision;
47extern char *isdn_tty_revision;
48#ifdef CONFIG_ISDN_PPP
49extern char *isdn_ppp_revision;
50#else
51static char *isdn_ppp_revision = ": none $";
52#endif
53#ifdef CONFIG_ISDN_AUDIO
54extern char *isdn_audio_revision;
55#else
56static char *isdn_audio_revision = ": none $";
57#endif
58extern char *isdn_v110_revision;
59
60#ifdef CONFIG_ISDN_DIVERSION
61static isdn_divert_if *divert_if; /* = NULL */
62#endif /* CONFIG_ISDN_DIVERSION */
63
64
65static int isdn_writebuf_stub(int, int, const u_char __user *, int);
66static void set_global_features(void);
67static int isdn_wildmat(char *s, char *p);
3e206b0a 68static int isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding);
1da177e4
LT		 69
70static inline void
71isdn_lock_driver(isdn_driver_t *drv)
72{
73 try_module_get(drv->interface->owner);
74 drv->locks++;
75}
76
77void
78isdn_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
89static inline void
90isdn_unlock_driver(isdn_driver_t *drv)
91{
92 if (drv->locks > 0) {
93 drv->locks--;
94 module_put(drv->interface->owner);
95 }
96}
97
98void
99isdn_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)
111void
112isdn_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 */
127static int
128isdn_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
155static int
156isdn_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
201int 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
218int
219isdn_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
228static int isdn_timer_cnt1 = 0;
229static int isdn_timer_cnt2 = 0;
230static int isdn_timer_cnt3 = 0;
231
232static void
233isdn_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
267void
268isdn_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 */
292static void
293isdn_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 */
335int
336isdn_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 }
09fca29d
KK		 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 }
1da177e4
LT		 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
379void
380isdn_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
3e206b0a 399static int
1da177e4
LT		 400isdn_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
416static int
417isdn_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 */
745int
746isdn_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 */
770int
771isdn_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 memcpy(cp, skb->data, 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
33f0f88f
AC		 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 */
882int
883isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
884{
885 int count;
886 int count_pull;
887 int count_put;
888 int dflag;
889 struct sk_buff *skb;
890 char last = 0;
891 int len;
892
893 if (!dev->drv[di])
894 return 0;
895 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
896 return 0;
897
898 len = tty_buffer_request_room(tty, dev->drv[di]->rcvcount[channel]);
899 if(len == 0)
900 return len;
901
902 count = 0;
903 while (len) {
904 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
905 break;
906#ifdef CONFIG_ISDN_AUDIO
907 if (ISDN_AUDIO_SKB_LOCK(skb))
908 break;
909 ISDN_AUDIO_SKB_LOCK(skb) = 1;
910 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
911 char *p = skb->data;
912 unsigned long DLEmask = (1 << channel);
913
914 dflag = 0;
915 count_pull = count_put = 0;
916 while ((count_pull < skb->len) && (len > 0)) {
917 len--;
918 if (dev->drv[di]->DLEflag & DLEmask) {
919 last = DLE;
920 dev->drv[di]->DLEflag &= ~DLEmask;
921 } else {
922 last = *p;
923 if (last == DLE) {
924 dev->drv[di]->DLEflag |= DLEmask;
925 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
926 }
927 p++;
928 count_pull++;
929 }
930 count_put++;
931 }
932 if (count_pull >= skb->len)
933 dflag = 1;
934 } else {
935#endif
936 /* No DLE's in buff, so simply copy it */
937 dflag = 1;
938 if ((count_pull = skb->len) > len) {
939 count_pull = len;
940 dflag = 0;
941 }
942 count_put = count_pull;
943 if(count_put > 1)
944 tty_insert_flip_string(tty, skb->data, count_put - 1);
916d1544 945 last = skb->data[count_put - 1];
33f0f88f
AC		 946 len -= count_put;
947#ifdef CONFIG_ISDN_AUDIO
948 }
949#endif
950 count += count_put;
951 if (dflag) {
952 /* We got all the data in this buff.
953 * Now we can dequeue it.
954 */
955 if(cisco_hack)
956 tty_insert_flip_char(tty, last, 0xFF);
957 else
958 tty_insert_flip_char(tty, last, TTY_NORMAL);
959#ifdef CONFIG_ISDN_AUDIO
960 ISDN_AUDIO_SKB_LOCK(skb) = 0;
961#endif
962 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
963 dev_kfree_skb(skb);
964 } else {
965 tty_insert_flip_char(tty, last, TTY_NORMAL);
966 /* Not yet emptied this buff, so it
967 * must stay in the queue, for further calls
968 * but we pull off the data we got until now.
969 */
970 skb_pull(skb, count_pull);
971#ifdef CONFIG_ISDN_AUDIO
972 ISDN_AUDIO_SKB_LOCK(skb) = 0;
973#endif
974 }
975 dev->drv[di]->rcvcount[channel] -= count_put;
976 }
977 return count;
978}
979
980
1da177e4
LT		 981static __inline int
982isdn_minor2drv(int minor)
983{
984 return (dev->drvmap[minor]);
985}
986
987static __inline int
988isdn_minor2chan(int minor)
989{
990 return (dev->chanmap[minor]);
991}
992
993static char *
994isdn_statstr(void)
995{
996 static char istatbuf[2048];
997 char *p;
998 int i;
999
1000 sprintf(istatbuf, "idmap:\t");
1001 p = istatbuf + strlen(istatbuf);
1002 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1003 sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]);
1004 p = istatbuf + strlen(istatbuf);
1005 }
1006 sprintf(p, "\nchmap:\t");
1007 p = istatbuf + strlen(istatbuf);
1008 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1009 sprintf(p, "%d ", dev->chanmap[i]);
1010 p = istatbuf + strlen(istatbuf);
1011 }
1012 sprintf(p, "\ndrmap:\t");
1013 p = istatbuf + strlen(istatbuf);
1014 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1015 sprintf(p, "%d ", dev->drvmap[i]);
1016 p = istatbuf + strlen(istatbuf);
1017 }
1018 sprintf(p, "\nusage:\t");
1019 p = istatbuf + strlen(istatbuf);
1020 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1021 sprintf(p, "%d ", dev->usage[i]);
1022 p = istatbuf + strlen(istatbuf);
1023 }
1024 sprintf(p, "\nflags:\t");
1025 p = istatbuf + strlen(istatbuf);
1026 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
1027 if (dev->drv[i]) {
1028 sprintf(p, "%ld ", dev->drv[i]->online);
1029 p = istatbuf + strlen(istatbuf);
1030 } else {
1031 sprintf(p, "? ");
1032 p = istatbuf + strlen(istatbuf);
1033 }
1034 }
1035 sprintf(p, "\nphone:\t");
1036 p = istatbuf + strlen(istatbuf);
1037 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1038 sprintf(p, "%s ", dev->num[i]);
1039 p = istatbuf + strlen(istatbuf);
1040 }
1041 sprintf(p, "\n");
1042 return istatbuf;
1043}
1044
1045/* Module interface-code */
1046
1047void
1048isdn_info_update(void)
1049{
1050 infostruct *p = dev->infochain;
1051
1052 while (p) {
1053 *(p->private) = 1;
1054 p = (infostruct *) p->next;
1055 }
1056 wake_up_interruptible(&(dev->info_waitq));
1057}
1058
1059static ssize_t
1060isdn_read(struct file *file, char __user *buf, size_t count, loff_t * off)
1061{
cd6b3956 1062 uint minor = iminor(file->f_dentry->d_inode);
1da177e4
LT		 1063 int len = 0;
1064 int drvidx;
1065 int chidx;
1066 int retval;
1067 char *p;
1068
1069 lock_kernel();
1070 if (minor == ISDN_MINOR_STATUS) {
1071 if (!file->private_data) {
1072 if (file->f_flags & O_NONBLOCK) {
1073 retval = -EAGAIN;
1074 goto out;
1075 }
1076 interruptible_sleep_on(&(dev->info_waitq));
1077 }
1078 p = isdn_statstr();
1079 file->private_data = NULL;
1080 if ((len = strlen(p)) <= count) {
1081 if (copy_to_user(buf, p, len)) {
1082 retval = -EFAULT;
1083 goto out;
1084 }
1085 *off += len;
1086 retval = len;
1087 goto out;
1088 }
1089 retval = 0;
1090 goto out;
1091 }
1092 if (!dev->drivers) {
1093 retval = -ENODEV;
1094 goto out;
1095 }
1096 if (minor <= ISDN_MINOR_BMAX) {
1097 printk(KERN_WARNING "isdn_read minor %d obsolete!\n", minor);
1098 drvidx = isdn_minor2drv(minor);
1099 if (drvidx < 0) {
1100 retval = -ENODEV;
1101 goto out;
1102 }
1103 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1104 retval = -ENODEV;
1105 goto out;
1106 }
1107 chidx = isdn_minor2chan(minor);
1108 if (!(p = kmalloc(count, GFP_KERNEL))) {
1109 retval = -ENOMEM;
1110 goto out;
1111 }
1112 len = isdn_readbchan(drvidx, chidx, p, NULL, count,
1113 &dev->drv[drvidx]->rcv_waitq[chidx]);
1114 *off += len;
1115 if (copy_to_user(buf,p,len))
1116 len = -EFAULT;
1117 kfree(p);
1118 retval = len;
1119 goto out;
1120 }
1121 if (minor <= ISDN_MINOR_CTRLMAX) {
1122 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1123 if (drvidx < 0) {
1124 retval = -ENODEV;
1125 goto out;
1126 }
1127 if (!dev->drv[drvidx]->stavail) {
1128 if (file->f_flags & O_NONBLOCK) {
1129 retval = -EAGAIN;
1130 goto out;
1131 }
1132 interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq));
1133 }
1134 if (dev->drv[drvidx]->interface->readstat) {
1135 if (count > dev->drv[drvidx]->stavail)
1136 count = dev->drv[drvidx]->stavail;
1137 len = dev->drv[drvidx]->interface->
1138 readstat(buf, count, drvidx,
1139 isdn_minor2chan(minor));
1140 } else {
1141 len = 0;
1142 }
1143 if (len)
1144 dev->drv[drvidx]->stavail -= len;
1145 else
1146 dev->drv[drvidx]->stavail = 0;
1147 *off += len;
1148 retval = len;
1149 goto out;
1150 }
1151#ifdef CONFIG_ISDN_PPP
1152 if (minor <= ISDN_MINOR_PPPMAX) {
1153 retval = isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count);
1154 goto out;
1155 }
1156#endif
1157 retval = -ENODEV;
1158 out:
1159 unlock_kernel();
1160 return retval;
1161}
1162
1163static ssize_t
1164isdn_write(struct file *file, const char __user *buf, size_t count, loff_t * off)
1165{
cd6b3956 1166 uint minor = iminor(file->f_dentry->d_inode);
1da177e4
LT		 1167 int drvidx;
1168 int chidx;
1169 int retval;
1170
1171 if (minor == ISDN_MINOR_STATUS)
1172 return -EPERM;
1173 if (!dev->drivers)
1174 return -ENODEV;
1175
1176 lock_kernel();
1177 if (minor <= ISDN_MINOR_BMAX) {
1178 printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor);
1179 drvidx = isdn_minor2drv(minor);
1180 if (drvidx < 0) {
1181 retval = -ENODEV;
1182 goto out;
1183 }
1184 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1185 retval = -ENODEV;
1186 goto out;
1187 }
1188 chidx = isdn_minor2chan(minor);
d20d04bc 1189 while ((retval = isdn_writebuf_stub(drvidx, chidx, buf, count)) == 0)
1da177e4 1190 interruptible_sleep_on(&dev->drv[drvidx]->snd_waitq[chidx]);
1da177e4
LT		 1191 goto out;
1192 }
1193 if (minor <= ISDN_MINOR_CTRLMAX) {
1194 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1195 if (drvidx < 0) {
1196 retval = -ENODEV;
1197 goto out;
1198 }
1199 /*
1200 * We want to use the isdnctrl device to load the firmware
1201 *
1202 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1203 return -ENODEV;
1204 */
1205 if (dev->drv[drvidx]->interface->writecmd)
1206 retval = dev->drv[drvidx]->interface->
1207 writecmd(buf, count, drvidx, isdn_minor2chan(minor));
1208 else
1209 retval = count;
1210 goto out;
1211 }
1212#ifdef CONFIG_ISDN_PPP
1213 if (minor <= ISDN_MINOR_PPPMAX) {
1214 retval = isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count);
1215 goto out;
1216 }
1217#endif
1218 retval = -ENODEV;
1219 out:
1220 unlock_kernel();
1221 return retval;
1222}
1223
1224static unsigned int
1225isdn_poll(struct file *file, poll_table * wait)
1226{
1227 unsigned int mask = 0;
cd6b3956 1228 unsigned int minor = iminor(file->f_dentry->d_inode);
1da177e4
LT		 1229 int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1230
1231 lock_kernel();
1232 if (minor == ISDN_MINOR_STATUS) {
1233 poll_wait(file, &(dev->info_waitq), wait);
1234 /* mask = POLLOUT | POLLWRNORM; */
1235 if (file->private_data) {
1236 mask |= POLLIN | POLLRDNORM;
1237 }
1238 goto out;
1239 }
1240 if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
1241 if (drvidx < 0) {
1242 /* driver deregistered while file open */
1243 mask = POLLHUP;
1244 goto out;
1245 }
1246 poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
1247 mask = POLLOUT | POLLWRNORM;
1248 if (dev->drv[drvidx]->stavail) {
1249 mask |= POLLIN | POLLRDNORM;
1250 }
1251 goto out;
1252 }
1253#ifdef CONFIG_ISDN_PPP
1254 if (minor <= ISDN_MINOR_PPPMAX) {
1255 mask = isdn_ppp_poll(file, wait);
1256 goto out;
1257 }
1258#endif
1259 mask = POLLERR;
1260 out:
1261 unlock_kernel();
1262 return mask;
1263}
1264
1265
1266static int
1267isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
1268{
cd6b3956 1269 uint minor = iminor(inode);
1da177e4
LT		 1270 isdn_ctrl c;
1271 int drvidx;
1272 int chidx;
1273 int ret;
1274 int i;
1275 char __user *p;
1276 char *s;
1277 union iocpar {
1278 char name[10];
1279 char bname[22];
1280 isdn_ioctl_struct iocts;
1281 isdn_net_ioctl_phone phone;
1282 isdn_net_ioctl_cfg cfg;
1283 } iocpar;
1284 void __user *argp = (void __user *)arg;
1285
1286#define name iocpar.name
1287#define bname iocpar.bname
1288#define iocts iocpar.iocts
1289#define phone iocpar.phone
1290#define cfg iocpar.cfg
1291
1292 if (minor == ISDN_MINOR_STATUS) {
1293 switch (cmd) {
1294 case IIOCGETDVR:
1295 return (TTY_DV +
1296 (NET_DV << 8) +
1297 (INF_DV << 16));
1298 case IIOCGETCPS:
1299 if (arg) {
1300 ulong __user *p = argp;
1301 int i;
1302 if (!access_ok(VERIFY_WRITE, p,
1303 sizeof(ulong) * ISDN_MAX_CHANNELS * 2))
1304 return -EFAULT;
1305 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1306 put_user(dev->ibytes[i], p++);
1307 put_user(dev->obytes[i], p++);
1308 }
1309 return 0;
1310 } else
1311 return -EINVAL;
1312 break;
1313#ifdef CONFIG_NETDEVICES
1314 case IIOCNETGPN:
1315 /* Get peer phone number of a connected
1316 * isdn network interface */
1317 if (arg) {
1318 if (copy_from_user(&phone, argp, sizeof(phone)))
1319 return -EFAULT;
1320 return isdn_net_getpeer(&phone, argp);
1321 } else
1322 return -EINVAL;
1323#endif
1324 default:
1325 return -EINVAL;
1326 }
1327 }
1328 if (!dev->drivers)
1329 return -ENODEV;
1330 if (minor <= ISDN_MINOR_BMAX) {
1331 drvidx = isdn_minor2drv(minor);
1332 if (drvidx < 0)
1333 return -ENODEV;
1334 chidx = isdn_minor2chan(minor);
1335 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1336 return -ENODEV;
1337 return 0;
1338 }
1339 if (minor <= ISDN_MINOR_CTRLMAX) {
1340/*
1341 * isdn net devices manage lots of configuration variables as linked lists.
1342 * Those lists must only be manipulated from user space. Some of the ioctl's
1343 * service routines access user space and are not atomic. Therefor, ioctl's
1344 * manipulating the lists and ioctl's sleeping while accessing the lists
1345 * are serialized by means of a semaphore.
1346 */
1347 switch (cmd) {
1348 case IIOCNETDWRSET:
1349 printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
1350 return(-EINVAL);
1351 case IIOCNETLCR:
1352 printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
1353 return -ENODEV;
1354#ifdef CONFIG_NETDEVICES
1355 case IIOCNETAIF:
1356 /* Add a network-interface */
1357 if (arg) {
1358 if (copy_from_user(name, argp, sizeof(name)))
1359 return -EFAULT;
1360 s = name;
1361 } else {
1362 s = NULL;
1363 }
1364 ret = down_interruptible(&dev->sem);
1365 if( ret ) return ret;
1366 if ((s = isdn_net_new(s, NULL))) {
1367 if (copy_to_user(argp, s, strlen(s) + 1)){
1368 ret = -EFAULT;
1369 } else {
1370 ret = 0;
1371 }
1372 } else
1373 ret = -ENODEV;
1374 up(&dev->sem);
1375 return ret;
1376 case IIOCNETASL:
1377 /* Add a slave to a network-interface */
1378 if (arg) {
1379 if (copy_from_user(bname, argp, sizeof(bname) - 1))
1380 return -EFAULT;
1381 } else
1382 return -EINVAL;
1383 ret = down_interruptible(&dev->sem);
1384 if( ret ) return ret;
1385 if ((s = isdn_net_newslave(bname))) {
1386 if (copy_to_user(argp, s, strlen(s) + 1)){
1387 ret = -EFAULT;
1388 } else {
1389 ret = 0;
1390 }
1391 } else
1392 ret = -ENODEV;
1393 up(&dev->sem);
1394 return ret;
1395 case IIOCNETDIF:
1396 /* Delete a network-interface */
1397 if (arg) {
1398 if (copy_from_user(name, argp, sizeof(name)))
1399 return -EFAULT;
1400 ret = down_interruptible(&dev->sem);
1401 if( ret ) return ret;
1402 ret = isdn_net_rm(name);
1403 up(&dev->sem);
1404 return ret;
1405 } else
1406 return -EINVAL;
1407 case IIOCNETSCF:
1408 /* Set configurable parameters of a network-interface */
1409 if (arg) {
1410 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1411 return -EFAULT;
1412 return isdn_net_setcfg(&cfg);
1413 } else
1414 return -EINVAL;
1415 case IIOCNETGCF:
1416 /* Get configurable parameters of a network-interface */
1417 if (arg) {
1418 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1419 return -EFAULT;
1420 if (!(ret = isdn_net_getcfg(&cfg))) {
1421 if (copy_to_user(argp, &cfg, sizeof(cfg)))
1422 return -EFAULT;
1423 }
1424 return ret;
1425 } else
1426 return -EINVAL;
1427 case IIOCNETANM:
1428 /* Add a phone-number to a network-interface */
1429 if (arg) {
1430 if (copy_from_user(&phone, argp, sizeof(phone)))
1431 return -EFAULT;
1432 ret = down_interruptible(&dev->sem);
1433 if( ret ) return ret;
1434 ret = isdn_net_addphone(&phone);
1435 up(&dev->sem);
1436 return ret;
1437 } else
1438 return -EINVAL;
1439 case IIOCNETGNM:
1440 /* Get list of phone-numbers of a network-interface */
1441 if (arg) {
1442 if (copy_from_user(&phone, argp, sizeof(phone)))
1443 return -EFAULT;
1444 ret = down_interruptible(&dev->sem);
1445 if( ret ) return ret;
1446 ret = isdn_net_getphones(&phone, argp);
1447 up(&dev->sem);
1448 return ret;
1449 } else
1450 return -EINVAL;
1451 case IIOCNETDNM:
1452 /* Delete a phone-number of a network-interface */
1453 if (arg) {
1454 if (copy_from_user(&phone, argp, sizeof(phone)))
1455 return -EFAULT;
1456 ret = down_interruptible(&dev->sem);
1457 if( ret ) return ret;
1458 ret = isdn_net_delphone(&phone);
1459 up(&dev->sem);
1460 return ret;
1461 } else
1462 return -EINVAL;
1463 case IIOCNETDIL:
1464 /* Force dialing of a network-interface */
1465 if (arg) {
1466 if (copy_from_user(name, argp, sizeof(name)))
1467 return -EFAULT;
1468 return isdn_net_force_dial(name);
1469 } else
1470 return -EINVAL;
1471#ifdef CONFIG_ISDN_PPP
1472 case IIOCNETALN:
1473 if (!arg)
1474 return -EINVAL;
1475 if (copy_from_user(name, argp, sizeof(name)))
1476 return -EFAULT;
1477 return isdn_ppp_dial_slave(name);
1478 case IIOCNETDLN:
1479 if (!arg)
1480 return -EINVAL;
1481 if (copy_from_user(name, argp, sizeof(name)))
1482 return -EFAULT;
1483 return isdn_ppp_hangup_slave(name);
1484#endif
1485 case IIOCNETHUP:
1486 /* Force hangup of a network-interface */
1487 if (!arg)
1488 return -EINVAL;
1489 if (copy_from_user(name, argp, sizeof(name)))
1490 return -EFAULT;
1491 return isdn_net_force_hangup(name);
1492 break;
1493#endif /* CONFIG_NETDEVICES */
1494 case IIOCSETVER:
1495 dev->net_verbose = arg;
1496 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1497 return 0;
1498 case IIOCSETGST:
1499 if (arg)
1500 dev->global_flags |= ISDN_GLOBAL_STOPPED;
1501 else
1502 dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1503 printk(KERN_INFO "isdn: Global Mode %s\n",
1504 (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1505 return 0;
1506 case IIOCSETBRJ:
1507 drvidx = -1;
1508 if (arg) {
1509 int i;
1510 char *p;
1511 if (copy_from_user(&iocts, argp,
1512 sizeof(isdn_ioctl_struct)))
1513 return -EFAULT;
1514 if (strlen(iocts.drvid)) {
1515 if ((p = strchr(iocts.drvid, ',')))
1516 *p = 0;
1517 drvidx = -1;
1518 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1519 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1520 drvidx = i;
1521 break;
1522 }
1523 }
1524 }
1525 if (drvidx == -1)
1526 return -ENODEV;
1527 if (iocts.arg)
1528 dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
1529 else
1530 dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
1531 return 0;
1532 case IIOCSIGPRF:
1533 dev->profd = current;
1534 return 0;
1535 break;
1536 case IIOCGETPRF:
1537 /* Get all Modem-Profiles */
1538 if (arg) {
1539 char __user *p = argp;
1540 int i;
1541
1542 if (!access_ok(VERIFY_WRITE, argp,
1543 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1544 * ISDN_MAX_CHANNELS))
1545 return -EFAULT;
1546
1547 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1548 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1549 ISDN_MODEM_NUMREG))
1550 return -EFAULT;
1551 p += ISDN_MODEM_NUMREG;
1552 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1553 return -EFAULT;
1554 p += ISDN_MSNLEN;
1555 if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
1556 return -EFAULT;
1557 p += ISDN_LMSNLEN;
1558 }
1559 return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
1560 } else
1561 return -EINVAL;
1562 break;
1563 case IIOCSETPRF:
1564 /* Set all Modem-Profiles */
1565 if (arg) {
1566 char __user *p = argp;
1567 int i;
1568
1569 if (!access_ok(VERIFY_READ, argp,
1570 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1571 * ISDN_MAX_CHANNELS))
1572 return -EFAULT;
1573
1574 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1575 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1576 ISDN_MODEM_NUMREG))
1577 return -EFAULT;
1578 p += ISDN_MODEM_NUMREG;
1579 if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
1580 return -EFAULT;
1581 p += ISDN_LMSNLEN;
1582 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1583 return -EFAULT;
1584 p += ISDN_MSNLEN;
1585 }
1586 return 0;
1587 } else
1588 return -EINVAL;
1589 break;
1590 case IIOCSETMAP:
1591 case IIOCGETMAP:
1592 /* Set/Get MSN->EAZ-Mapping for a driver */
1593 if (arg) {
1594
1595 if (copy_from_user(&iocts, argp,
1596 sizeof(isdn_ioctl_struct)))
1597 return -EFAULT;
1598 if (strlen(iocts.drvid)) {
1599 drvidx = -1;
1600 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1601 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1602 drvidx = i;
1603 break;
1604 }
1605 } else
1606 drvidx = 0;
1607 if (drvidx == -1)
1608 return -ENODEV;
1609 if (cmd == IIOCSETMAP) {
1610 int loop = 1;
1611
1612 p = (char __user *) iocts.arg;
1613 i = 0;
1614 while (loop) {
1615 int j = 0;
1616
1617 while (1) {
1618 if (!access_ok(VERIFY_READ, p, 1))
1619 return -EFAULT;
1620 get_user(bname[j], p++);
1621 switch (bname[j]) {
1622 case '\0':
1623 loop = 0;
1624 /* Fall through */
1625 case ',':
1626 bname[j] = '\0';
1627 strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
1628 j = ISDN_MSNLEN;
1629 break;
1630 default:
1631 j++;
1632 }
1633 if (j >= ISDN_MSNLEN)
1634 break;
1635 }
1636 if (++i > 9)
1637 break;
1638 }
1639 } else {
1640 p = (char __user *) iocts.arg;
1641 for (i = 0; i < 10; i++) {
1642 sprintf(bname, "%s%s",
1643 strlen(dev->drv[drvidx]->msn2eaz[i]) ?
1644 dev->drv[drvidx]->msn2eaz[i] : "_",
1645 (i < 9) ? "," : "\0");
1646 if (copy_to_user(p, bname, strlen(bname) + 1))
1647 return -EFAULT;
1648 p += strlen(bname);
1649 }
1650 }
1651 return 0;
1652 } else
1653 return -EINVAL;
1654 case IIOCDBGVAR:
1655 if (arg) {
1656 if (copy_to_user(argp, &dev, sizeof(ulong)))
1657 return -EFAULT;
1658 return 0;
1659 } else
1660 return -EINVAL;
1661 break;
1662 default:
1663 if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
1664 cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
1665 else
1666 return -EINVAL;
1667 if (arg) {
1668 int i;
1669 char *p;
1670 if (copy_from_user(&iocts, argp, sizeof(isdn_ioctl_struct)))
1671 return -EFAULT;
1672 if (strlen(iocts.drvid)) {
1673 if ((p = strchr(iocts.drvid, ',')))
1674 *p = 0;
1675 drvidx = -1;
1676 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1677 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1678 drvidx = i;
1679 break;
1680 }
1681 } else
1682 drvidx = 0;
1683 if (drvidx == -1)
1684 return -ENODEV;
1685 if (!access_ok(VERIFY_WRITE, argp,
1686 sizeof(isdn_ioctl_struct)))
1687 return -EFAULT;
1688 c.driver = drvidx;
1689 c.command = ISDN_CMD_IOCTL;
1690 c.arg = cmd;
1691 memcpy(c.parm.num, &iocts.arg, sizeof(ulong));
1692 ret = isdn_command(&c);
1693 memcpy(&iocts.arg, c.parm.num, sizeof(ulong));
1694 if (copy_to_user(argp, &iocts, sizeof(isdn_ioctl_struct)))
1695 return -EFAULT;
1696 return ret;
1697 } else
1698 return -EINVAL;
1699 }
1700 }
1701#ifdef CONFIG_ISDN_PPP
1702 if (minor <= ISDN_MINOR_PPPMAX)
1703 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1704#endif
1705 return -ENODEV;
1706
1707#undef name
1708#undef bname
1709#undef iocts
1710#undef phone
1711#undef cfg
1712}
1713
1714/*
1715 * Open the device code.
1716 */
1717static int
1718isdn_open(struct inode *ino, struct file *filep)
1719{
cd6b3956 1720 uint minor = iminor(ino);
1da177e4
LT		 1721 int drvidx;
1722 int chidx;
1723 int retval = -ENODEV;
1724
1725
1726 if (minor == ISDN_MINOR_STATUS) {
1727 infostruct *p;
1728
1729 if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1730 p->next = (char *) dev->infochain;
1731 p->private = (char *) &(filep->private_data);
1732 dev->infochain = p;
1733 /* At opening we allow a single update */
1734 filep->private_data = (char *) 1;
1735 retval = 0;
1736 goto out;
1737 } else {
1738 retval = -ENOMEM;
1739 goto out;
1740 }
1741 }
1742 if (!dev->channels)
1743 goto out;
1744 if (minor <= ISDN_MINOR_BMAX) {
1745 printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
1746 drvidx = isdn_minor2drv(minor);
1747 if (drvidx < 0)
1748 goto out;
1749 chidx = isdn_minor2chan(minor);
1750 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1751 goto out;
1752 if (!(dev->drv[drvidx]->online & (1 << chidx)))
1753 goto out;
1754 isdn_lock_drivers();
1755 retval = 0;
1756 goto out;
1757 }
1758 if (minor <= ISDN_MINOR_CTRLMAX) {
1759 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1760 if (drvidx < 0)
1761 goto out;
1762 isdn_lock_drivers();
1763 retval = 0;
1764 goto out;
1765 }
1766#ifdef CONFIG_ISDN_PPP
1767 if (minor <= ISDN_MINOR_PPPMAX) {
1768 retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
1769 if (retval == 0)
1770 isdn_lock_drivers();
1771 goto out;
1772 }
1773#endif
1774 out:
1775 nonseekable_open(ino, filep);
1776 return retval;
1777}
1778
1779static int
1780isdn_close(struct inode *ino, struct file *filep)
1781{
cd6b3956 1782 uint minor = iminor(ino);
1da177e4
LT		 1783
1784 lock_kernel();
1785 if (minor == ISDN_MINOR_STATUS) {
1786 infostruct *p = dev->infochain;
1787 infostruct *q = NULL;
1788
1789 while (p) {
1790 if (p->private == (char *) &(filep->private_data)) {
1791 if (q)
1792 q->next = p->next;
1793 else
1794 dev->infochain = (infostruct *) (p->next);
1795 kfree(p);
1796 goto out;
1797 }
1798 q = p;
1799 p = (infostruct *) (p->next);
1800 }
1801 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1802 goto out;
1803 }
1804 isdn_unlock_drivers();
1805 if (minor <= ISDN_MINOR_BMAX)
1806 goto out;
1807 if (minor <= ISDN_MINOR_CTRLMAX) {
1808 if (dev->profd == current)
1809 dev->profd = NULL;
1810 goto out;
1811 }
1812#ifdef CONFIG_ISDN_PPP
1813 if (minor <= ISDN_MINOR_PPPMAX)
1814 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1815#endif
1816
1817 out:
1818 unlock_kernel();
1819 return 0;
1820}
1821
1822static struct file_operations isdn_fops =
1823{
1824 .owner = THIS_MODULE,
1825 .llseek = no_llseek,
1826 .read = isdn_read,
1827 .write = isdn_write,
1828 .poll = isdn_poll,
1829 .ioctl = isdn_ioctl,
1830 .open = isdn_open,
1831 .release = isdn_close,
1832};
1833
1834char *
1835isdn_map_eaz2msn(char *msn, int di)
1836{
1837 isdn_driver_t *this = dev->drv[di];
1838 int i;
1839
1840 if (strlen(msn) == 1) {
1841 i = msn[0] - '0';
1842 if ((i >= 0) && (i <= 9))
1843 if (strlen(this->msn2eaz[i]))
1844 return (this->msn2eaz[i]);
1845 }
1846 return (msn);
1847}
1848
1849/*
1850 * Find an unused ISDN-channel, whose feature-flags match the
1851 * given L2- and L3-protocols.
1852 */
1853#define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038))
1854
1855/*
1856 * This function must be called with holding the dev->lock.
1857 */
1858int
1859isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1860 ,int pre_chan, char *msn)
1861{
1862 int i;
1863 ulong features;
1864 ulong vfeatures;
1865
1866 features = ((1 << l2_proto) | (0x10000 << l3_proto));
1867 vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1868 ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038));
1869 /* If Layer-2 protocol is V.110, accept drivers with
1870 * transparent feature even if these don't support V.110
1871 * because we can emulate this in linklevel.
1872 */
1873 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1874 if (USG_NONE(dev->usage[i]) &&
1875 (dev->drvmap[i] != -1)) {
1876 int d = dev->drvmap[i];
1877 if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1878 ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1879 continue;
1880 if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
1881 continue;
1882 if (dev->usage[i] & ISDN_USAGE_DISABLED)
1883 continue; /* usage not allowed */
1884 if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
1885 if (((dev->drv[d]->interface->features & features) == features) ||
1886 (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1887 (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1888 if ((pre_dev < 0) || (pre_chan < 0)) {
1889 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1890 dev->usage[i] |= usage;
1891 isdn_info_update();
1892 return i;
1893 } else {
1894 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1895 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1896 dev->usage[i] |= usage;
1897 isdn_info_update();
1898 return i;
1899 }
1900 }
1901 }
1902 }
1903 }
1904 return -1;
1905}
1906
1907/*
1908 * Set state of ISDN-channel to 'unused'
1909 */
1910void
1911isdn_free_channel(int di, int ch, int usage)
1912{
1913 int i;
1914
09fca29d
KK		 1915 if ((di < 0) || (ch < 0)) {
1916 printk(KERN_WARNING "%s: called with invalid drv(%d) or channel(%d)\n",
1917 __FUNCTION__, di, ch);
1918 return;
1919 }
1da177e4
LT		 1920 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1921 if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
1922 (dev->drvmap[i] == di) &&
1923 (dev->chanmap[i] == ch)) {
1924 dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1925 strcpy(dev->num[i], "???");
1926 dev->ibytes[i] = 0;
1927 dev->obytes[i] = 0;
1928// 20.10.99 JIM, try to reinitialize v110 !
1929 dev->v110emu[i] = 0;
1930 atomic_set(&(dev->v110use[i]), 0);
1931 isdn_v110_close(dev->v110[i]);
1932 dev->v110[i] = NULL;
1933// 20.10.99 JIM, try to reinitialize v110 !
1934 isdn_info_update();
09fca29d
KK		 1935 if (dev->drv[di])
1936 skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
1da177e4
LT		 1937 }
1938}
1939
1940/*
1941 * Cancel Exclusive-Flag for ISDN-channel
1942 */
1943void
1944isdn_unexclusive_channel(int di, int ch)
1945{
1946 int i;
1947
1948 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1949 if ((dev->drvmap[i] == di) &&
1950 (dev->chanmap[i] == ch)) {
1951 dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1952 isdn_info_update();
1953 return;
1954 }
1955}
1956
1957/*
1958 * writebuf replacement for SKB_ABLE drivers
1959 */
1960static int
1961isdn_writebuf_stub(int drvidx, int chan, const u_char __user * buf, int len)
1962{
1963 int ret;
1964 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1965 struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1966
1967 if (!skb)
d20d04bc 1968 return -ENOMEM;
1da177e4 1969 skb_reserve(skb, hl);
d20d04bc
JJ		 1970 if (copy_from_user(skb_put(skb, len), buf, len))
1971 return -EFAULT;
1da177e4
LT		 1972 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
1973 if (ret <= 0)
1974 dev_kfree_skb(skb);
1975 if (ret > 0)
1976 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
1977 return ret;
1978}
1979
1980/*
1981 * Return: length of data on success, -ERRcode on failure.
1982 */
1983int
1984isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
1985{
1986 int ret;
1987 struct sk_buff *nskb = NULL;
1988 int v110_ret = skb->len;
1989 int idx = isdn_dc2minor(drvidx, chan);
1990
1991 if (dev->v110[idx]) {
1992 atomic_inc(&dev->v110use[idx]);
1993 nskb = isdn_v110_encode(dev->v110[idx], skb);
1994 atomic_dec(&dev->v110use[idx]);
1995 if (!nskb)
1996 return 0;
1997 v110_ret = *((int *)nskb->data);
1998 skb_pull(nskb, sizeof(int));
1999 if (!nskb->len) {
2000 dev_kfree_skb(nskb);
2001 return v110_ret;
2002 }
2003 /* V.110 must always be acknowledged */
2004 ack = 1;
2005 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
2006 } else {
2007 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
2008
2009 if( skb_headroom(skb) < hl ){
2010 /*
2011 * This should only occur when new HL driver with
2012 * increased hl_hdrlen was loaded after netdevice
2013 * was created and connected to the new driver.
2014 *
2015 * The V.110 branch (re-allocates on its own) does
2016 * not need this
2017 */
2018 struct sk_buff * skb_tmp;
2019
2020 skb_tmp = skb_realloc_headroom(skb, hl);
2021 printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
2022 if (!skb_tmp) return -ENOMEM; /* 0 better? */
2023 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
2024 if( ret > 0 ){
2025 dev_kfree_skb(skb);
2026 } else {
2027 dev_kfree_skb(skb_tmp);
2028 }
2029 } else {
2030 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
2031 }
2032 }
2033 if (ret > 0) {
2034 dev->obytes[idx] += ret;
2035 if (dev->v110[idx]) {
2036 atomic_inc(&dev->v110use[idx]);
2037 dev->v110[idx]->skbuser++;
2038 atomic_dec(&dev->v110use[idx]);
2039 /* For V.110 return unencoded data length */
2040 ret = v110_ret;
2041 /* if the complete frame was send we free the skb;
2042 if not upper function will requeue the skb */
2043 if (ret == skb->len)
2044 dev_kfree_skb(skb);
2045 }
2046 } else
2047 if (dev->v110[idx])
2048 dev_kfree_skb(nskb);
2049 return ret;
2050}
2051
3e206b0a 2052static int
1da177e4
LT		 2053isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
2054{
2055 int j, k, m;
2056
2057 init_waitqueue_head(&d->st_waitq);
2058 if (d->flags & DRV_FLAG_RUNNING)
2059 return -1;
2060 if (n < 1) return 0;
2061
2062 m = (adding) ? d->channels + n : n;
2063
2064 if (dev->channels + n > ISDN_MAX_CHANNELS) {
2065 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
2066 ISDN_MAX_CHANNELS);
2067 return -1;
2068 }
2069
2070 if ((adding) && (d->rcverr))
2071 kfree(d->rcverr);
2072 if (!(d->rcverr = kmalloc(sizeof(int) * m, GFP_ATOMIC))) {
2073 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
2074 return -1;
2075 }
2076 memset((char *) d->rcverr, 0, sizeof(int) * m);
2077
2078 if ((adding) && (d->rcvcount))
2079 kfree(d->rcvcount);
2080 if (!(d->rcvcount = kmalloc(sizeof(int) * m, GFP_ATOMIC))) {
2081 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
f9101210
JJ		 2082 if (!adding)
2083 kfree(d->rcverr);
1da177e4
LT		 2084 return -1;
2085 }
2086 memset((char *) d->rcvcount, 0, sizeof(int) * m);
2087
2088 if ((adding) && (d->rpqueue)) {
2089 for (j = 0; j < d->channels; j++)
2090 skb_queue_purge(&d->rpqueue[j]);
2091 kfree(d->rpqueue);
2092 }
2093 if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_ATOMIC))) {
2094 printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
2095 if (!adding) {
2096 kfree(d->rcvcount);
2097 kfree(d->rcverr);
2098 }
2099 return -1;
2100 }
2101 for (j = 0; j < m; j++) {
2102 skb_queue_head_init(&d->rpqueue[j]);
2103 }
2104
2105 if ((adding) && (d->rcv_waitq))
2106 kfree(d->rcv_waitq);
2107 d->rcv_waitq = kmalloc(sizeof(wait_queue_head_t) * 2 * m, GFP_ATOMIC);
2108 if (!d->rcv_waitq) {
2109 printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
2110 if (!adding) {
2111 kfree(d->rpqueue);
2112 kfree(d->rcvcount);
2113 kfree(d->rcverr);
2114 }
2115 return -1;
2116 }
2117 d->snd_waitq = d->rcv_waitq + m;
2118 for (j = 0; j < m; j++) {
2119 init_waitqueue_head(&d->rcv_waitq[j]);
2120 init_waitqueue_head(&d->snd_waitq[j]);
2121 }
2122
2123 dev->channels += n;
2124 for (j = d->channels; j < m; j++)
2125 for (k = 0; k < ISDN_MAX_CHANNELS; k++)
2126 if (dev->chanmap[k] < 0) {
2127 dev->chanmap[k] = j;
2128 dev->drvmap[k] = drvidx;
2129 break;
2130 }
2131 d->channels = m;
2132 return 0;
2133}
2134
2135/*
2136 * Low-level-driver registration
2137 */
2138
2139static void
2140set_global_features(void)
2141{
2142 int drvidx;
2143
2144 dev->global_features = 0;
2145 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
2146 if (!dev->drv[drvidx])
2147 continue;
2148 if (dev->drv[drvidx]->interface)
2149 dev->global_features |= dev->drv[drvidx]->interface->features;
2150 }
2151}
2152
2153#ifdef CONFIG_ISDN_DIVERSION
2154
2155static char *map_drvname(int di)
2156{
2157 if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
2158 return(NULL);
2159 return(dev->drvid[di]); /* driver name */
2160} /* map_drvname */
2161
2162static int map_namedrv(char *id)
2163{ int i;
2164
2165 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2166 { if (!strcmp(dev->drvid[i],id))
2167 return(i);
2168 }
2169 return(-1);
2170} /* map_namedrv */
2171
2172int DIVERT_REG_NAME(isdn_divert_if *i_div)
2173{
2174 if (i_div->if_magic != DIVERT_IF_MAGIC)
2175 return(DIVERT_VER_ERR);
2176 switch (i_div->cmd)
2177 {
2178 case DIVERT_CMD_REL:
2179 if (divert_if != i_div)
2180 return(DIVERT_REL_ERR);
2181 divert_if = NULL; /* free interface */
2182 return(DIVERT_NO_ERR);
2183
2184 case DIVERT_CMD_REG:
2185 if (divert_if)
2186 return(DIVERT_REG_ERR);
2187 i_div->ll_cmd = isdn_command; /* set command function */
2188 i_div->drv_to_name = map_drvname;
2189 i_div->name_to_drv = map_namedrv;
2190 divert_if = i_div; /* remember interface */
2191 return(DIVERT_NO_ERR);
2192
2193 default:
2194 return(DIVERT_CMD_ERR);
2195 }
2196} /* DIVERT_REG_NAME */
2197
2198EXPORT_SYMBOL(DIVERT_REG_NAME);
2199
2200#endif /* CONFIG_ISDN_DIVERSION */
2201
2202
2203EXPORT_SYMBOL(register_isdn);
2204#ifdef CONFIG_ISDN_PPP
2205EXPORT_SYMBOL(isdn_ppp_register_compressor);
2206EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
2207#endif
2208
2209int
2210register_isdn(isdn_if * i)
2211{
2212 isdn_driver_t *d;
2213 int j;
2214 ulong flags;
2215 int drvidx;
2216
2217 if (dev->drivers >= ISDN_MAX_DRIVERS) {
2218 printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
2219 ISDN_MAX_DRIVERS);
2220 return 0;
2221 }
2222 if (!i->writebuf_skb) {
2223 printk(KERN_WARNING "register_isdn: No write routine given.\n");
2224 return 0;
2225 }
2226 if (!(d = kmalloc(sizeof(isdn_driver_t), GFP_KERNEL))) {
2227 printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
2228 return 0;
2229 }
2230 memset((char *) d, 0, sizeof(isdn_driver_t));
2231
2232 d->maxbufsize = i->maxbufsize;
2233 d->pktcount = 0;
2234 d->stavail = 0;
2235 d->flags = DRV_FLAG_LOADED;
2236 d->online = 0;
2237 d->interface = i;
2238 d->channels = 0;
2239 spin_lock_irqsave(&dev->lock, flags);
2240 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2241 if (!dev->drv[drvidx])
2242 break;
2243 if (isdn_add_channels(d, drvidx, i->channels, 0)) {
2244 spin_unlock_irqrestore(&dev->lock, flags);
2245 kfree(d);
2246 return 0;
2247 }
2248 i->channels = drvidx;
2249 i->rcvcallb_skb = isdn_receive_skb_callback;
2250 i->statcallb = isdn_status_callback;
2251 if (!strlen(i->id))
2252 sprintf(i->id, "line%d", drvidx);
2253 for (j = 0; j < drvidx; j++)
2254 if (!strcmp(i->id, dev->drvid[j]))
2255 sprintf(i->id, "line%d", drvidx);
2256 dev->drv[drvidx] = d;
2257 strcpy(dev->drvid[drvidx], i->id);
2258 isdn_info_update();
2259 dev->drivers++;
2260 set_global_features();
2261 spin_unlock_irqrestore(&dev->lock, flags);
2262 return 1;
2263}
2264
2265/*
2266 *****************************************************************************
2267 * And now the modules code.
2268 *****************************************************************************
2269 */
2270
2271static char *
2272isdn_getrev(const char *revision)
2273{
2274 char *rev;
2275 char *p;
2276
2277 if ((p = strchr(revision, ':'))) {
2278 rev = p + 2;
2279 p = strchr(rev, '$');
2280 *--p = 0;
2281 } else
2282 rev = "???";
2283 return rev;
2284}
2285
2286/*
2287 * Allocate and initialize all data, register modem-devices
2288 */
2289static int __init isdn_init(void)
2290{
2291 int i;
2292 char tmprev[50];
2293
2294 if (!(dev = (isdn_dev *) vmalloc(sizeof(isdn_dev)))) {
2295 printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
2296 return -EIO;
2297 }
2298 memset((char *) dev, 0, sizeof(isdn_dev));
2299 init_timer(&dev->timer);
2300 dev->timer.function = isdn_timer_funct;
2301 spin_lock_init(&dev->lock);
2302 spin_lock_init(&dev->timerlock);
2303#ifdef MODULE
2304 dev->owner = THIS_MODULE;
2305#endif
2306 init_MUTEX(&dev->sem);
2307 init_waitqueue_head(&dev->info_waitq);
2308 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2309 dev->drvmap[i] = -1;
2310 dev->chanmap[i] = -1;
2311 dev->m_idx[i] = -1;
2312 strcpy(dev->num[i], "???");
2313 init_waitqueue_head(&dev->mdm.info[i].open_wait);
2314 init_waitqueue_head(&dev->mdm.info[i].close_wait);
2315 }
2316 if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
2317 printk(KERN_WARNING "isdn: Could not register control devices\n");
2318 vfree(dev);
2319 return -EIO;
2320 }
2321 if ((isdn_tty_modem_init()) < 0) {
2322 printk(KERN_WARNING "isdn: Could not register tty devices\n");
2323 vfree(dev);
2324 unregister_chrdev(ISDN_MAJOR, "isdn");
2325 return -EIO;
2326 }
2327#ifdef CONFIG_ISDN_PPP
2328 if (isdn_ppp_init() < 0) {
2329 printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
2330 isdn_tty_exit();
2331 unregister_chrdev(ISDN_MAJOR, "isdn");
2332 vfree(dev);
2333 return -EIO;
2334 }
2335#endif /* CONFIG_ISDN_PPP */
2336
2337 strcpy(tmprev, isdn_revision);
2338 printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
2339 strcpy(tmprev, isdn_tty_revision);
2340 printk("%s/", isdn_getrev(tmprev));
2341 strcpy(tmprev, isdn_net_revision);
2342 printk("%s/", isdn_getrev(tmprev));
2343 strcpy(tmprev, isdn_ppp_revision);
2344 printk("%s/", isdn_getrev(tmprev));
2345 strcpy(tmprev, isdn_audio_revision);
2346 printk("%s/", isdn_getrev(tmprev));
2347 strcpy(tmprev, isdn_v110_revision);
2348 printk("%s", isdn_getrev(tmprev));
2349
2350#ifdef MODULE
2351 printk(" loaded\n");
2352#else
2353 printk("\n");
2354#endif
2355 isdn_info_update();
2356 return 0;
2357}
2358
2359/*
2360 * Unload module
2361 */
2362static void __exit isdn_exit(void)
2363{
2364#ifdef CONFIG_ISDN_PPP
2365 isdn_ppp_cleanup();
2366#endif
2367 if (isdn_net_rmall() < 0) {
2368 printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
2369 return;
2370 }
2371 isdn_tty_exit();
2372 unregister_chrdev(ISDN_MAJOR, "isdn");
2373 del_timer(&dev->timer);
2374 /* call vfree with interrupts enabled, else it will hang */
2375 vfree(dev);
2376 printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
2377}
2378
2379module_init(isdn_init);
2380module_exit(isdn_exit);
Linux kernel - Deliverables
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