1 /* $Id: isdn_common.c,v 1.1.4.1 2001/11/20 14:19:34 kai 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/config.h>
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/version.h>
18 #include <linux/poll.h>
19 #include <linux/vmalloc.h>
20 #include <linux/isdn.h>
21 #include <linux/smp_lock.h>
22 #include "isdn_common.h"
23 #include "isdn_tty.h"
24 #include "isdn_net.h"
25 #include "isdn_ppp.h"
26 #ifdef CONFIG_ISDN_AUDIO
27 #include "isdn_audio.h"
28 #endif
29 #ifdef CONFIG_ISDN_DIVERSION_MODULE
30 #define CONFIG_ISDN_DIVERSION
31 #endif
32 #ifdef CONFIG_ISDN_DIVERSION
33 #include <linux/isdn_divertif.h>
34 #endif /* CONFIG_ISDN_DIVERSION */
35 #include "isdn_v110.h"
36 #include <linux/devfs_fs_kernel.h>
37
38 /* Debugflags */
39 #undef ISDN_DEBUG_STATCALLB
40
41 MODULE_DESCRIPTION("ISDN4Linux: link layer");
42 MODULE_AUTHOR("Fritz Elfert");
43 MODULE_LICENSE("GPL");
44
45 isdn_dev *dev;
46
47 static char *isdn_revision = "$Revision: 1.1.4.1 $";
48
49 extern char *isdn_net_revision;
50 extern char *isdn_tty_revision;
51 #ifdef CONFIG_ISDN_PPP
52 extern char *isdn_ppp_revision;
53 #else
54 static char *isdn_ppp_revision = ": none $";
55 #endif
56 #ifdef CONFIG_ISDN_AUDIO
57 extern char *isdn_audio_revision;
58 #else
59 static char *isdn_audio_revision = ": none $";
60 #endif
61 extern char *isdn_v110_revision;
62
63 #ifdef CONFIG_ISDN_DIVERSION
64 static isdn_divert_if *divert_if; /* = NULL */
65 #endif /* CONFIG_ISDN_DIVERSION */
66
67
68 static int isdn_writebuf_stub(int, int, const u_char *, int, int);
69 static void set_global_features(void);
70 static void isdn_register_devfs(int);
71 static void isdn_unregister_devfs(int);
72 static int isdn_wildmat(char *s, char *p);
73
74 void
isdn_lock_drivers(void)75 isdn_lock_drivers(void)
76 {
77 int i;
78 isdn_ctrl cmd;
79
80 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
81 if (!dev->drv[i])
82 continue;
83
84 cmd.driver = i;
85 cmd.arg = 0;
86 cmd.command = ISDN_CMD_LOCK;
87 isdn_command(&cmd);
88 dev->drv[i]->locks++;
89 }
90 }
91
92 void
isdn_MOD_INC_USE_COUNT(void)93 isdn_MOD_INC_USE_COUNT(void)
94 {
95 MOD_INC_USE_COUNT;
96 isdn_lock_drivers();
97 }
98
99 void
isdn_unlock_drivers(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
108 if (dev->drv[i]->locks > 0) {
109 isdn_ctrl cmd;
110
111 cmd.driver = i;
112 cmd.arg = 0;
113 cmd.command = ISDN_CMD_UNLOCK;
114 isdn_command(&cmd);
115 dev->drv[i]->locks--;
116 }
117 }
118 }
119
120 void
isdn_MOD_DEC_USE_COUNT(void)121 isdn_MOD_DEC_USE_COUNT(void)
122 {
123 MOD_DEC_USE_COUNT;
124 isdn_unlock_drivers();
125 }
126
127 #if defined(ISDN_DEBUG_NET_DUMP) || defined(ISDN_DEBUG_MODEM_DUMP)
128 void
isdn_dumppkt(char * s,u_char * p,int len,int dumplen)129 isdn_dumppkt(char *s, u_char * p, int len, int dumplen)
130 {
131 int dumpc;
132
133 printk(KERN_DEBUG "%s(%d) ", s, len);
134 for (dumpc = 0; (dumpc < dumplen) && (len); len--, dumpc++)
135 printk(" %02x", *p++);
136 printk("\n");
137 }
138 #endif
139
140 /*
141 * I picked the pattern-matching-functions from an old GNU-tar version (1.10)
142 * It was originally written and put to PD by rs@mirror.TMC.COM (Rich Salz)
143 */
144 static int
isdn_star(char * s,char * p)145 isdn_star(char *s, char *p)
146 {
147 while (isdn_wildmat(s, p)) {
148 if (*++s == '\0')
149 return (2);
150 }
151 return (0);
152 }
153
154 /*
155 * Shell-type Pattern-matching for incoming caller-Ids
156 * This function gets a string in s and checks, if it matches the pattern
157 * given in p.
158 *
159 * Return:
160 * 0 = match.
161 * 1 = no match.
162 * 2 = no match. Would eventually match, if s would be longer.
163 *
164 * Possible Patterns:
165 *
166 * '?' matches one character
167 * '*' matches zero or more characters
168 * [xyz] matches the set of characters in brackets.
169 * [^xyz] matches any single character not in the set of characters
170 */
171
172 static int
isdn_wildmat(char * s,char * p)173 isdn_wildmat(char *s, char *p)
174 {
175 register int last;
176 register int matched;
177 register int reverse;
178 register int nostar = 1;
179
180 if (!(*s) && !(*p))
181 return(1);
182 for (; *p; s++, p++)
183 switch (*p) {
184 case '\\':
185 /*
186 * Literal match with following character,
187 * fall through.
188 */
189 p++;
190 default:
191 if (*s != *p)
192 return (*s == '\0')?2:1;
193 continue;
194 case '?':
195 /* Match anything. */
196 if (*s == '\0')
197 return (2);
198 continue;
199 case '*':
200 nostar = 0;
201 /* Trailing star matches everything. */
202 return (*++p ? isdn_star(s, p) : 0);
203 case '[':
204 /* [^....] means inverse character class. */
205 if ((reverse = (p[1] == '^')))
206 p++;
207 for (last = 0, matched = 0; *++p && (*p != ']'); last = *p)
208 /* This next line requires a good C compiler. */
209 if (*p == '-' ? *s <= *++p && *s >= last : *s == *p)
210 matched = 1;
211 if (matched == reverse)
212 return (1);
213 continue;
214 }
215 return (*s == '\0')?0:nostar;
216 }
217
isdn_msncmp(const char * msn1,const char * msn2)218 int isdn_msncmp( const char * msn1, const char * msn2 )
219 {
220 char TmpMsn1[ ISDN_MSNLEN ];
221 char TmpMsn2[ ISDN_MSNLEN ];
222 char *p;
223
224 for ( p = TmpMsn1; *msn1 && *msn1 != ':'; ) // Strip off a SPID
225 *p++ = *msn1++;
226 *p = '\0';
227
228 for ( p = TmpMsn2; *msn2 && *msn2 != ':'; ) // Strip off a SPID
229 *p++ = *msn2++;
230 *p = '\0';
231
232 return isdn_wildmat( TmpMsn1, TmpMsn2 );
233 }
234
235 int
isdn_dc2minor(int di,int ch)236 isdn_dc2minor(int di, int ch)
237 {
238 int i;
239 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
240 if (dev->chanmap[i] == ch && dev->drvmap[i] == di)
241 return i;
242 return -1;
243 }
244
245 static int isdn_timer_cnt1 = 0;
246 static int isdn_timer_cnt2 = 0;
247 static int isdn_timer_cnt3 = 0;
248
249 static void
isdn_timer_funct(ulong dummy)250 isdn_timer_funct(ulong dummy)
251 {
252 int tf = dev->tflags;
253 if (tf & ISDN_TIMER_FAST) {
254 if (tf & ISDN_TIMER_MODEMREAD)
255 isdn_tty_readmodem();
256 if (tf & ISDN_TIMER_MODEMPLUS)
257 isdn_tty_modem_escape();
258 if (tf & ISDN_TIMER_MODEMXMIT)
259 isdn_tty_modem_xmit();
260 }
261 if (tf & ISDN_TIMER_SLOW) {
262 if (++isdn_timer_cnt1 >= ISDN_TIMER_02SEC) {
263 isdn_timer_cnt1 = 0;
264 if (tf & ISDN_TIMER_NETDIAL)
265 isdn_net_dial();
266 }
267 if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) {
268 isdn_timer_cnt2 = 0;
269 if (tf & ISDN_TIMER_NETHANGUP)
270 isdn_net_autohup();
271 if (++isdn_timer_cnt3 >= ISDN_TIMER_RINGING) {
272 isdn_timer_cnt3 = 0;
273 if (tf & ISDN_TIMER_MODEMRING)
274 isdn_tty_modem_ring();
275 }
276 if (tf & ISDN_TIMER_CARRIER)
277 isdn_tty_carrier_timeout();
278 }
279 }
280 if (tf)
281 {
282 unsigned long flags;
283
284 save_flags(flags);
285 cli();
286 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
287 restore_flags(flags);
288 }
289 }
290
291 void
isdn_timer_ctrl(int tf,int onoff)292 isdn_timer_ctrl(int tf, int onoff)
293 {
294 unsigned long flags;
295 int old_tflags;
296
297 save_flags(flags);
298 cli();
299 if ((tf & ISDN_TIMER_SLOW) && (!(dev->tflags & ISDN_TIMER_SLOW))) {
300 /* If the slow-timer wasn't activated until now */
301 isdn_timer_cnt1 = 0;
302 isdn_timer_cnt2 = 0;
303 }
304 old_tflags = dev->tflags;
305 if (onoff)
306 dev->tflags |= tf;
307 else
308 dev->tflags &= ~tf;
309 if (dev->tflags && !old_tflags)
310 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
311 restore_flags(flags);
312 }
313
314 /*
315 * Receive a packet from B-Channel. (Called from low-level-module)
316 */
317 static void
isdn_receive_skb_callback(int di,int channel,struct sk_buff * skb)318 isdn_receive_skb_callback(int di, int channel, struct sk_buff *skb)
319 {
320 int i;
321
322 if ((i = isdn_dc2minor(di, channel)) == -1) {
323 dev_kfree_skb(skb);
324 return;
325 }
326 /* Update statistics */
327 dev->ibytes[i] += skb->len;
328
329 /* First, try to deliver data to network-device */
330 if (isdn_net_rcv_skb(i, skb))
331 return;
332
333 /* V.110 handling
334 * makes sense for async streams only, so it is
335 * called after possible net-device delivery.
336 */
337 if (dev->v110[i]) {
338 atomic_inc(&dev->v110use[i]);
339 skb = isdn_v110_decode(dev->v110[i], skb);
340 atomic_dec(&dev->v110use[i]);
341 if (!skb)
342 return;
343 }
344
345 /* No network-device found, deliver to tty or raw-channel */
346 if (skb->len) {
347 if (isdn_tty_rcv_skb(i, di, channel, skb))
348 return;
349 wake_up_interruptible(&dev->drv[di]->rcv_waitq[channel]);
350 } else
351 dev_kfree_skb(skb);
352 }
353
354 /*
355 * Intercept command from Linklevel to Lowlevel.
356 * If layer 2 protocol is V.110 and this is not supported by current
357 * lowlevel-driver, use driver's transparent mode and handle V.110 in
358 * linklevel instead.
359 */
360 int
isdn_command(isdn_ctrl * cmd)361 isdn_command(isdn_ctrl *cmd)
362 {
363 if (cmd->driver == -1) {
364 printk(KERN_WARNING "isdn_command command(%x) driver -1\n", cmd->command);
365 return(1);
366 }
367 if (cmd->command == ISDN_CMD_SETL2) {
368 int idx = isdn_dc2minor(cmd->driver, cmd->arg & 255);
369 unsigned long l2prot = (cmd->arg >> 8) & 255;
370 unsigned long features = (dev->drv[cmd->driver]->interface->features
371 >> ISDN_FEATURE_L2_SHIFT) &
372 ISDN_FEATURE_L2_MASK;
373 unsigned long l2_feature = (1 << l2prot);
374
375 switch (l2prot) {
376 case ISDN_PROTO_L2_V11096:
377 case ISDN_PROTO_L2_V11019:
378 case ISDN_PROTO_L2_V11038:
379 /* If V.110 requested, but not supported by
380 * HL-driver, set emulator-flag and change
381 * Layer-2 to transparent
382 */
383 if (!(features & l2_feature)) {
384 dev->v110emu[idx] = l2prot;
385 cmd->arg = (cmd->arg & 255) |
386 (ISDN_PROTO_L2_TRANS << 8);
387 } else
388 dev->v110emu[idx] = 0;
389 }
390 }
391 return dev->drv[cmd->driver]->interface->command(cmd);
392 }
393
394 void
isdn_all_eaz(int di,int ch)395 isdn_all_eaz(int di, int ch)
396 {
397 isdn_ctrl cmd;
398
399 if (di < 0)
400 return;
401 cmd.driver = di;
402 cmd.arg = ch;
403 cmd.command = ISDN_CMD_SETEAZ;
404 cmd.parm.num[0] = '\0';
405 isdn_command(&cmd);
406 }
407
408 /*
409 * Begin of a CAPI like LL<->HL interface, currently used only for
410 * supplementary service (CAPI 2.0 part III)
411 */
412 #include "avmb1/capicmd.h" /* this should be moved in a common place */
413
414 int
isdn_capi_rec_hl_msg(capi_msg * cm)415 isdn_capi_rec_hl_msg(capi_msg *cm) {
416
417 int di;
418 int ch;
419
420 di = (cm->adr.Controller & 0x7f) -1;
421 ch = isdn_dc2minor(di, (cm->adr.Controller>>8)& 0x7f);
422 switch(cm->Command) {
423 case CAPI_FACILITY:
424 /* in the moment only handled in tty */
425 return(isdn_tty_capi_facility(cm));
426 default:
427 return(-1);
428 }
429 }
430
431 static int
isdn_status_callback(isdn_ctrl * c)432 isdn_status_callback(isdn_ctrl * c)
433 {
434 int di;
435 ulong flags;
436 int i;
437 int r;
438 int retval = 0;
439 isdn_ctrl cmd;
440 isdn_net_dev *p;
441
442 di = c->driver;
443 i = isdn_dc2minor(di, c->arg);
444 switch (c->command) {
445 case ISDN_STAT_BSENT:
446 if (i < 0)
447 return -1;
448 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
449 return 0;
450 if (isdn_net_stat_callback(i, c))
451 return 0;
452 if (isdn_v110_stat_callback(i, c))
453 return 0;
454 if (isdn_tty_stat_callback(i, c))
455 return 0;
456 wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]);
457 break;
458 case ISDN_STAT_STAVAIL:
459 save_flags(flags);
460 cli();
461 dev->drv[di]->stavail += c->arg;
462 restore_flags(flags);
463 wake_up_interruptible(&dev->drv[di]->st_waitq);
464 break;
465 case ISDN_STAT_RUN:
466 dev->drv[di]->flags |= DRV_FLAG_RUNNING;
467 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
468 if (dev->drvmap[i] == di)
469 isdn_all_eaz(di, dev->chanmap[i]);
470 set_global_features();
471 break;
472 case ISDN_STAT_STOP:
473 dev->drv[di]->flags &= ~DRV_FLAG_RUNNING;
474 break;
475 case ISDN_STAT_ICALL:
476 if (i < 0)
477 return -1;
478 #ifdef ISDN_DEBUG_STATCALLB
479 printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num);
480 #endif
481 if (dev->global_flags & ISDN_GLOBAL_STOPPED) {
482 cmd.driver = di;
483 cmd.arg = c->arg;
484 cmd.command = ISDN_CMD_HANGUP;
485 isdn_command(&cmd);
486 return 0;
487 }
488 /* Try to find a network-interface which will accept incoming call */
489 r = ((c->command == ISDN_STAT_ICALLW) ? 0 : isdn_net_find_icall(di, c->arg, i, &c->parm.setup));
490 switch (r) {
491 case 0:
492 /* No network-device replies.
493 * Try ttyI's.
494 * These return 0 on no match, 1 on match and
495 * 3 on eventually match, if CID is longer.
496 */
497 if (c->command == ISDN_STAT_ICALL)
498 if ((retval = isdn_tty_find_icall(di, c->arg, &c->parm.setup))) return(retval);
499 #ifdef CONFIG_ISDN_DIVERSION
500 if (divert_if)
501 if ((retval = divert_if->stat_callback(c)))
502 return(retval); /* processed */
503 #endif /* CONFIG_ISDN_DIVERSION */
504 if ((!retval) && (dev->drv[di]->flags & DRV_FLAG_REJBUS)) {
505 /* No tty responding */
506 cmd.driver = di;
507 cmd.arg = c->arg;
508 cmd.command = ISDN_CMD_HANGUP;
509 isdn_command(&cmd);
510 retval = 2;
511 }
512 break;
513 case 1:
514 /* Schedule connection-setup */
515 isdn_net_dial();
516 cmd.driver = di;
517 cmd.arg = c->arg;
518 cmd.command = ISDN_CMD_ACCEPTD;
519 for ( p = dev->netdev; p; p = p->next )
520 if ( p->local->isdn_channel == cmd.arg )
521 {
522 strcpy( cmd.parm.setup.eazmsn, p->local->msn );
523 isdn_command(&cmd);
524 retval = 1;
525 break;
526 }
527 break;
528
529 case 2: /* For calling back, first reject incoming call ... */
530 case 3: /* Interface found, but down, reject call actively */
531 retval = 2;
532 printk(KERN_INFO "isdn: Rejecting Call\n");
533 cmd.driver = di;
534 cmd.arg = c->arg;
535 cmd.command = ISDN_CMD_HANGUP;
536 isdn_command(&cmd);
537 if (r == 3)
538 break;
539 /* Fall through */
540 case 4:
541 /* ... then start callback. */
542 isdn_net_dial();
543 break;
544 case 5:
545 /* Number would eventually match, if longer */
546 retval = 3;
547 break;
548 }
549 #ifdef ISDN_DEBUG_STATCALLB
550 printk(KERN_DEBUG "ICALL: ret=%d\n", retval);
551 #endif
552 return retval;
553 break;
554 case ISDN_STAT_CINF:
555 if (i < 0)
556 return -1;
557 #ifdef ISDN_DEBUG_STATCALLB
558 printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num);
559 #endif
560 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
561 return 0;
562 if (strcmp(c->parm.num, "0"))
563 isdn_net_stat_callback(i, c);
564 isdn_tty_stat_callback(i, c);
565 break;
566 case ISDN_STAT_CAUSE:
567 #ifdef ISDN_DEBUG_STATCALLB
568 printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num);
569 #endif
570 printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n",
571 dev->drvid[di], c->arg, c->parm.num);
572 isdn_tty_stat_callback(i, c);
573 #ifdef CONFIG_ISDN_DIVERSION
574 if (divert_if)
575 divert_if->stat_callback(c);
576 #endif /* CONFIG_ISDN_DIVERSION */
577 break;
578 case ISDN_STAT_DISPLAY:
579 #ifdef ISDN_DEBUG_STATCALLB
580 printk(KERN_DEBUG "DISPLAY: %ld %s\n", c->arg, c->parm.display);
581 #endif
582 isdn_tty_stat_callback(i, c);
583 #ifdef CONFIG_ISDN_DIVERSION
584 if (divert_if)
585 divert_if->stat_callback(c);
586 #endif /* CONFIG_ISDN_DIVERSION */
587 break;
588 case ISDN_STAT_DCONN:
589 if (i < 0)
590 return -1;
591 #ifdef ISDN_DEBUG_STATCALLB
592 printk(KERN_DEBUG "DCONN: %ld\n", c->arg);
593 #endif
594 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
595 return 0;
596 /* Find any net-device, waiting for D-channel setup */
597 if (isdn_net_stat_callback(i, c))
598 break;
599 isdn_v110_stat_callback(i, c);
600 /* Find any ttyI, waiting for D-channel setup */
601 if (isdn_tty_stat_callback(i, c)) {
602 cmd.driver = di;
603 cmd.arg = c->arg;
604 cmd.command = ISDN_CMD_ACCEPTB;
605 isdn_command(&cmd);
606 break;
607 }
608 break;
609 case ISDN_STAT_DHUP:
610 if (i < 0)
611 return -1;
612 #ifdef ISDN_DEBUG_STATCALLB
613 printk(KERN_DEBUG "DHUP: %ld\n", c->arg);
614 #endif
615 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
616 return 0;
617 dev->drv[di]->online &= ~(1 << (c->arg));
618 isdn_info_update();
619 /* Signal hangup to network-devices */
620 if (isdn_net_stat_callback(i, c))
621 break;
622 isdn_v110_stat_callback(i, c);
623 if (isdn_tty_stat_callback(i, c))
624 break;
625 #ifdef CONFIG_ISDN_DIVERSION
626 if (divert_if)
627 divert_if->stat_callback(c);
628 #endif /* CONFIG_ISDN_DIVERSION */
629 break;
630 break;
631 case ISDN_STAT_BCONN:
632 if (i < 0)
633 return -1;
634 #ifdef ISDN_DEBUG_STATCALLB
635 printk(KERN_DEBUG "BCONN: %ld\n", c->arg);
636 #endif
637 /* Signal B-channel-connect to network-devices */
638 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
639 return 0;
640 dev->drv[di]->online |= (1 << (c->arg));
641 isdn_info_update();
642 if (isdn_net_stat_callback(i, c))
643 break;
644 isdn_v110_stat_callback(i, c);
645 if (isdn_tty_stat_callback(i, c))
646 break;
647 break;
648 case ISDN_STAT_BHUP:
649 if (i < 0)
650 return -1;
651 #ifdef ISDN_DEBUG_STATCALLB
652 printk(KERN_DEBUG "BHUP: %ld\n", c->arg);
653 #endif
654 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
655 return 0;
656 dev->drv[di]->online &= ~(1 << (c->arg));
657 isdn_info_update();
658 #ifdef CONFIG_ISDN_X25
659 /* Signal hangup to network-devices */
660 if (isdn_net_stat_callback(i, c))
661 break;
662 #endif
663 isdn_v110_stat_callback(i, c);
664 if (isdn_tty_stat_callback(i, c))
665 break;
666 break;
667 case ISDN_STAT_NODCH:
668 if (i < 0)
669 return -1;
670 #ifdef ISDN_DEBUG_STATCALLB
671 printk(KERN_DEBUG "NODCH: %ld\n", c->arg);
672 #endif
673 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
674 return 0;
675 if (isdn_net_stat_callback(i, c))
676 break;
677 if (isdn_tty_stat_callback(i, c))
678 break;
679 break;
680 case ISDN_STAT_ADDCH:
681 if (isdn_add_channels(dev->drv[di], di, c->arg, 1))
682 return -1;
683 isdn_info_update();
684 break;
685 case ISDN_STAT_DISCH:
686 save_flags(flags);
687 cli();
688 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
689 if ((dev->drvmap[i] == di) &&
690 (dev->chanmap[i] == c->arg)) {
691 if (c->parm.num[0])
692 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
693 else
694 if (USG_NONE(dev->usage[i])) {
695 dev->usage[i] |= ISDN_USAGE_DISABLED;
696 }
697 else
698 retval = -1;
699 break;
700 }
701 restore_flags(flags);
702 isdn_info_update();
703 break;
704 case ISDN_STAT_UNLOAD:
705 while (dev->drv[di]->locks > 0) {
706 isdn_ctrl cmd;
707 cmd.driver = di;
708 cmd.arg = 0;
709 cmd.command = ISDN_CMD_UNLOCK;
710 isdn_command(&cmd);
711 dev->drv[di]->locks--;
712 }
713 save_flags(flags);
714 cli();
715 isdn_tty_stat_callback(i, c);
716 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
717 if (dev->drvmap[i] == di) {
718 dev->drvmap[i] = -1;
719 dev->chanmap[i] = -1;
720 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
721 isdn_unregister_devfs(i);
722 }
723 dev->drivers--;
724 dev->channels -= dev->drv[di]->channels;
725 kfree(dev->drv[di]->rcverr);
726 kfree(dev->drv[di]->rcvcount);
727 for (i = 0; i < dev->drv[di]->channels; i++)
728 skb_queue_purge(&dev->drv[di]->rpqueue[i]);
729 kfree(dev->drv[di]->rpqueue);
730 kfree(dev->drv[di]->rcv_waitq);
731 kfree(dev->drv[di]);
732 dev->drv[di] = NULL;
733 dev->drvid[di][0] = '\0';
734 isdn_info_update();
735 set_global_features();
736 restore_flags(flags);
737 return 0;
738 case ISDN_STAT_L1ERR:
739 break;
740 case CAPI_PUT_MESSAGE:
741 return(isdn_capi_rec_hl_msg(&c->parm.cmsg));
742 #ifdef CONFIG_ISDN_TTY_FAX
743 case ISDN_STAT_FAXIND:
744 isdn_tty_stat_callback(i, c);
745 break;
746 #endif
747 #ifdef CONFIG_ISDN_AUDIO
748 case ISDN_STAT_AUDIO:
749 isdn_tty_stat_callback(i, c);
750 break;
751 #endif
752 #ifdef CONFIG_ISDN_DIVERSION
753 case ISDN_STAT_PROT:
754 case ISDN_STAT_REDIR:
755 if (divert_if)
756 return(divert_if->stat_callback(c));
757 #endif /* CONFIG_ISDN_DIVERSION */
758 default:
759 return -1;
760 }
761 return 0;
762 }
763
764 /*
765 * Get integer from char-pointer, set pointer to end of number
766 */
767 int
isdn_getnum(char ** p)768 isdn_getnum(char **p)
769 {
770 int v = -1;
771
772 while (*p[0] >= '0' && *p[0] <= '9')
773 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0');
774 return v;
775 }
776
777 #define DLE 0x10
778
779 /*
780 * isdn_readbchan() tries to get data from the read-queue.
781 * It MUST be called with interrupts off.
782 *
783 * Be aware that this is not an atomic operation when sleep != 0, even though
784 * interrupts are turned off! Well, like that we are currently only called
785 * on behalf of a read system call on raw device files (which are documented
786 * to be dangerous and for for debugging purpose only). The inode semaphore
787 * takes care that this is not called for the same minor device number while
788 * we are sleeping, but access is not serialized against simultaneous read()
789 * from the corresponding ttyI device. Can other ugly events, like changes
790 * of the mapping (di,ch)<->minor, happen during the sleep? --he
791 */
792 int
isdn_readbchan(int di,int channel,u_char * buf,u_char * fp,int len,wait_queue_head_t * sleep)793 isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, wait_queue_head_t *sleep)
794 {
795 int count;
796 int count_pull;
797 int count_put;
798 int dflag;
799 struct sk_buff *skb;
800 u_char *cp;
801
802 if (!dev->drv[di])
803 return 0;
804 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) {
805 if (sleep)
806 interruptible_sleep_on(sleep);
807 else
808 return 0;
809 }
810 if (len > dev->drv[di]->rcvcount[channel])
811 len = dev->drv[di]->rcvcount[channel];
812 cp = buf;
813 count = 0;
814 while (len) {
815 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
816 break;
817 #ifdef CONFIG_ISDN_AUDIO
818 if (ISDN_AUDIO_SKB_LOCK(skb))
819 break;
820 ISDN_AUDIO_SKB_LOCK(skb) = 1;
821 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
822 char *p = skb->data;
823 unsigned long DLEmask = (1 << channel);
824
825 dflag = 0;
826 count_pull = count_put = 0;
827 while ((count_pull < skb->len) && (len > 0)) {
828 len--;
829 if (dev->drv[di]->DLEflag & DLEmask) {
830 *cp++ = DLE;
831 dev->drv[di]->DLEflag &= ~DLEmask;
832 } else {
833 *cp++ = *p;
834 if (*p == DLE) {
835 dev->drv[di]->DLEflag |= DLEmask;
836 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
837 }
838 p++;
839 count_pull++;
840 }
841 count_put++;
842 }
843 if (count_pull >= skb->len)
844 dflag = 1;
845 } else {
846 #endif
847 /* No DLE's in buff, so simply copy it */
848 dflag = 1;
849 if ((count_pull = skb->len) > len) {
850 count_pull = len;
851 dflag = 0;
852 }
853 count_put = count_pull;
854 memcpy(cp, skb->data, count_put);
855 cp += count_put;
856 len -= count_put;
857 #ifdef CONFIG_ISDN_AUDIO
858 }
859 #endif
860 count += count_put;
861 if (fp) {
862 memset(fp, 0, count_put);
863 fp += count_put;
864 }
865 if (dflag) {
866 /* We got all the data in this buff.
867 * Now we can dequeue it.
868 */
869 if (fp)
870 *(fp - 1) = 0xff;
871 #ifdef CONFIG_ISDN_AUDIO
872 ISDN_AUDIO_SKB_LOCK(skb) = 0;
873 #endif
874 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
875 dev_kfree_skb(skb);
876 } else {
877 /* Not yet emptied this buff, so it
878 * must stay in the queue, for further calls
879 * but we pull off the data we got until now.
880 */
881 skb_pull(skb, count_pull);
882 #ifdef CONFIG_ISDN_AUDIO
883 ISDN_AUDIO_SKB_LOCK(skb) = 0;
884 #endif
885 }
886 dev->drv[di]->rcvcount[channel] -= count_put;
887 }
888 return count;
889 }
890
891 static __inline int
isdn_minor2drv(int minor)892 isdn_minor2drv(int minor)
893 {
894 return (dev->drvmap[minor]);
895 }
896
897 static __inline int
isdn_minor2chan(int minor)898 isdn_minor2chan(int minor)
899 {
900 return (dev->chanmap[minor]);
901 }
902
903 static char *
isdn_statstr(void)904 isdn_statstr(void)
905 {
906 static char istatbuf[2048];
907 char *p;
908 int i;
909
910 sprintf(istatbuf, "idmap:\t");
911 p = istatbuf + strlen(istatbuf);
912 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
913 sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]);
914 p = istatbuf + strlen(istatbuf);
915 }
916 sprintf(p, "\nchmap:\t");
917 p = istatbuf + strlen(istatbuf);
918 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
919 sprintf(p, "%d ", dev->chanmap[i]);
920 p = istatbuf + strlen(istatbuf);
921 }
922 sprintf(p, "\ndrmap:\t");
923 p = istatbuf + strlen(istatbuf);
924 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
925 sprintf(p, "%d ", dev->drvmap[i]);
926 p = istatbuf + strlen(istatbuf);
927 }
928 sprintf(p, "\nusage:\t");
929 p = istatbuf + strlen(istatbuf);
930 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
931 sprintf(p, "%d ", dev->usage[i]);
932 p = istatbuf + strlen(istatbuf);
933 }
934 sprintf(p, "\nflags:\t");
935 p = istatbuf + strlen(istatbuf);
936 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
937 if (dev->drv[i]) {
938 sprintf(p, "%ld ", dev->drv[i]->online);
939 p = istatbuf + strlen(istatbuf);
940 } else {
941 sprintf(p, "? ");
942 p = istatbuf + strlen(istatbuf);
943 }
944 }
945 sprintf(p, "\nphone:\t");
946 p = istatbuf + strlen(istatbuf);
947 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
948 sprintf(p, "%s ", dev->num[i]);
949 p = istatbuf + strlen(istatbuf);
950 }
951 sprintf(p, "\n");
952 return istatbuf;
953 }
954
955 /* Module interface-code */
956
957 void
isdn_info_update(void)958 isdn_info_update(void)
959 {
960 infostruct *p = dev->infochain;
961
962 while (p) {
963 *(p->private) = 1;
964 p = (infostruct *) p->next;
965 }
966 wake_up_interruptible(&(dev->info_waitq));
967 }
968
969 static ssize_t
isdn_read(struct file * file,char * buf,size_t count,loff_t * off)970 isdn_read(struct file *file, char *buf, size_t count, loff_t * off)
971 {
972 uint minor = MINOR(file->f_dentry->d_inode->i_rdev);
973 int len = 0;
974 ulong flags;
975 int drvidx;
976 int chidx;
977 int retval;
978 char *p;
979 loff_t pos = *off;
980
981 if (off != &file->f_pos)
982 return -ESPIPE;
983
984 if (pos != (unsigned) pos)
985 return -EINVAL;
986
987 lock_kernel();
988 if (minor == ISDN_MINOR_STATUS) {
989 if (!file->private_data) {
990 if (file->f_flags & O_NONBLOCK) {
991 retval = -EAGAIN;
992 goto out;
993 }
994 interruptible_sleep_on(&(dev->info_waitq));
995 }
996 p = isdn_statstr();
997 file->private_data = 0;
998 if ((len = strlen(p)) <= count) {
999 if (copy_to_user(buf, p, len)) {
1000 retval = -EFAULT;
1001 goto out;
1002 }
1003 *off = pos + len;
1004 retval = len;
1005 goto out;
1006 }
1007 retval = 0;
1008 goto out;
1009 }
1010 if (!dev->drivers) {
1011 retval = -ENODEV;
1012 goto out;
1013 }
1014 if (minor <= ISDN_MINOR_BMAX) {
1015 printk(KERN_WARNING "isdn_read minor %d obsolete!\n", minor);
1016 drvidx = isdn_minor2drv(minor);
1017 if (drvidx < 0) {
1018 retval = -ENODEV;
1019 goto out;
1020 }
1021 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1022 retval = -ENODEV;
1023 goto out;
1024 }
1025 chidx = isdn_minor2chan(minor);
1026 if (!(p = kmalloc(count, GFP_KERNEL))) {
1027 retval = -ENOMEM;
1028 goto out;
1029 }
1030 save_flags(flags);
1031 cli();
1032 len = isdn_readbchan(drvidx, chidx, p, 0, count,
1033 &dev->drv[drvidx]->rcv_waitq[chidx]);
1034 *off = pos + len;
1035 restore_flags(flags);
1036 if (copy_to_user(buf,p,len))
1037 len = -EFAULT;
1038 kfree(p);
1039 retval = len;
1040 goto out;
1041 }
1042 if (minor <= ISDN_MINOR_CTRLMAX) {
1043 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1044 if (drvidx < 0) {
1045 retval = -ENODEV;
1046 goto out;
1047 }
1048 if (!dev->drv[drvidx]->stavail) {
1049 if (file->f_flags & O_NONBLOCK) {
1050 retval = -EAGAIN;
1051 goto out;
1052 }
1053 interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq));
1054 }
1055 if (dev->drv[drvidx]->interface->readstat) {
1056 if (count > dev->drv[drvidx]->stavail)
1057 count = dev->drv[drvidx]->stavail;
1058 len = dev->drv[drvidx]->interface->
1059 readstat(buf, count, 1, drvidx,
1060 isdn_minor2chan(minor));
1061 if (len < 0) {
1062 retval = len;
1063 goto out;
1064 }
1065 } else {
1066 len = 0;
1067 }
1068 save_flags(flags);
1069 cli();
1070 if (len)
1071 dev->drv[drvidx]->stavail -= len;
1072 else
1073 dev->drv[drvidx]->stavail = 0;
1074 restore_flags(flags);
1075 *off = pos + len;
1076 retval = len;
1077 goto out;
1078 }
1079 #ifdef CONFIG_ISDN_PPP
1080 if (minor <= ISDN_MINOR_PPPMAX) {
1081 retval = isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count);
1082 goto out;
1083 }
1084 #endif
1085 retval = -ENODEV;
1086 out:
1087 unlock_kernel();
1088 return retval;
1089 }
1090
1091 static ssize_t
isdn_write(struct file * file,const char * buf,size_t count,loff_t * off)1092 isdn_write(struct file *file, const char *buf, size_t count, loff_t * off)
1093 {
1094 uint minor = MINOR(file->f_dentry->d_inode->i_rdev);
1095 int drvidx;
1096 int chidx;
1097 int retval;
1098
1099 if (off != &file->f_pos)
1100 return -ESPIPE;
1101
1102 if (minor == ISDN_MINOR_STATUS)
1103 return -EPERM;
1104 if (!dev->drivers)
1105 return -ENODEV;
1106
1107 lock_kernel();
1108 if (minor <= ISDN_MINOR_BMAX) {
1109 printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor);
1110 drvidx = isdn_minor2drv(minor);
1111 if (drvidx < 0) {
1112 retval = -ENODEV;
1113 goto out;
1114 }
1115 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1116 retval = -ENODEV;
1117 goto out;
1118 }
1119 chidx = isdn_minor2chan(minor);
1120 while (isdn_writebuf_stub(drvidx, chidx, buf, count, 1) != count)
1121 interruptible_sleep_on(&dev->drv[drvidx]->snd_waitq[chidx]);
1122 retval = count;
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 /*
1132 * We want to use the isdnctrl device to load the firmware
1133 *
1134 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1135 return -ENODEV;
1136 */
1137 if (dev->drv[drvidx]->interface->writecmd)
1138 retval = dev->drv[drvidx]->interface->
1139 writecmd(buf, count, 1, drvidx, isdn_minor2chan(minor));
1140 else
1141 retval = count;
1142 goto out;
1143 }
1144 #ifdef CONFIG_ISDN_PPP
1145 if (minor <= ISDN_MINOR_PPPMAX) {
1146 retval = isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count);
1147 goto out;
1148 }
1149 #endif
1150 retval = -ENODEV;
1151 out:
1152 unlock_kernel();
1153 return retval;
1154 }
1155
1156 static unsigned int
isdn_poll(struct file * file,poll_table * wait)1157 isdn_poll(struct file *file, poll_table * wait)
1158 {
1159 unsigned int mask = 0;
1160 unsigned int minor = MINOR(file->f_dentry->d_inode->i_rdev);
1161 int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1162
1163 lock_kernel();
1164 if (minor == ISDN_MINOR_STATUS) {
1165 poll_wait(file, &(dev->info_waitq), wait);
1166 /* mask = POLLOUT | POLLWRNORM; */
1167 if (file->private_data) {
1168 mask |= POLLIN | POLLRDNORM;
1169 }
1170 goto out;
1171 }
1172 if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
1173 if (drvidx < 0) {
1174 /* driver deregistered while file open */
1175 mask = POLLHUP;
1176 goto out;
1177 }
1178 poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
1179 mask = POLLOUT | POLLWRNORM;
1180 if (dev->drv[drvidx]->stavail) {
1181 mask |= POLLIN | POLLRDNORM;
1182 }
1183 goto out;
1184 }
1185 #ifdef CONFIG_ISDN_PPP
1186 if (minor <= ISDN_MINOR_PPPMAX) {
1187 mask = isdn_ppp_poll(file, wait);
1188 goto out;
1189 }
1190 #endif
1191 mask = POLLERR;
1192 out:
1193 unlock_kernel();
1194 return mask;
1195 }
1196
1197
1198 static int
isdn_ioctl(struct inode * inode,struct file * file,uint cmd,ulong arg)1199 isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
1200 {
1201 uint minor = MINOR(inode->i_rdev);
1202 isdn_ctrl c;
1203 int drvidx;
1204 int chidx;
1205 int ret;
1206 int i;
1207 char *p;
1208 char *s;
1209 union iocpar {
1210 char name[10];
1211 char bname[22];
1212 isdn_ioctl_struct iocts;
1213 isdn_net_ioctl_phone phone;
1214 isdn_net_ioctl_cfg cfg;
1215 } iocpar;
1216
1217 #define name iocpar.name
1218 #define bname iocpar.bname
1219 #define iocts iocpar.iocts
1220 #define phone iocpar.phone
1221 #define cfg iocpar.cfg
1222
1223 if (minor == ISDN_MINOR_STATUS) {
1224 switch (cmd) {
1225 case IIOCGETDVR:
1226 return (TTY_DV +
1227 (NET_DV << 8) +
1228 (INF_DV << 16));
1229 case IIOCGETCPS:
1230 if (arg) {
1231 ulong *p = (ulong *) arg;
1232 int i;
1233 if ((ret = verify_area(VERIFY_WRITE, (void *) arg,
1234 sizeof(ulong) * ISDN_MAX_CHANNELS * 2)))
1235 return ret;
1236 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1237 put_user(dev->ibytes[i], p++);
1238 put_user(dev->obytes[i], p++);
1239 }
1240 return 0;
1241 } else
1242 return -EINVAL;
1243 break;
1244 #ifdef CONFIG_NETDEVICES
1245 case IIOCNETGPN:
1246 /* Get peer phone number of a connected
1247 * isdn network interface */
1248 if (arg) {
1249 if (copy_from_user((char *) &phone, (char *) arg, sizeof(phone)))
1250 return -EFAULT;
1251 return isdn_net_getpeer(&phone, (isdn_net_ioctl_phone *) arg);
1252 } else
1253 return -EINVAL;
1254 #endif
1255 default:
1256 return -EINVAL;
1257 }
1258 }
1259 if (!dev->drivers)
1260 return -ENODEV;
1261 if (minor <= ISDN_MINOR_BMAX) {
1262 drvidx = isdn_minor2drv(minor);
1263 if (drvidx < 0)
1264 return -ENODEV;
1265 chidx = isdn_minor2chan(minor);
1266 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1267 return -ENODEV;
1268 return 0;
1269 }
1270 if (minor <= ISDN_MINOR_CTRLMAX) {
1271 /*
1272 * isdn net devices manage lots of configuration variables as linked lists.
1273 * Those lists must only be manipulated from user space. Some of the ioctl's
1274 * service routines access user space and are not atomic. Therefor, ioctl's
1275 * manipulating the lists and ioctl's sleeping while accessing the lists
1276 * are serialized by means of a semaphore.
1277 */
1278 switch (cmd) {
1279 case IIOCNETDWRSET:
1280 printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
1281 return(-EINVAL);
1282 case IIOCNETLCR:
1283 printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
1284 return -ENODEV;
1285 #ifdef CONFIG_NETDEVICES
1286 case IIOCNETAIF:
1287 /* Add a network-interface */
1288 if (arg) {
1289 if (copy_from_user(name, (char *) arg, sizeof(name)))
1290 return -EFAULT;
1291 s = name;
1292 } else {
1293 s = NULL;
1294 }
1295 ret = down_interruptible(&dev->sem);
1296 if( ret ) return ret;
1297 if ((s = isdn_net_new(s, NULL))) {
1298 if (copy_to_user((char *) arg, s, strlen(s) + 1)){
1299 ret = -EFAULT;
1300 } else {
1301 ret = 0;
1302 }
1303 } else
1304 ret = -ENODEV;
1305 up(&dev->sem);
1306 return ret;
1307 case IIOCNETASL:
1308 /* Add a slave to a network-interface */
1309 if (arg) {
1310 if (copy_from_user(bname, (char *) arg, sizeof(bname) - 1))
1311 return -EFAULT;
1312 } else
1313 return -EINVAL;
1314 ret = down_interruptible(&dev->sem);
1315 if( ret ) return ret;
1316 if ((s = isdn_net_newslave(bname))) {
1317 if (copy_to_user((char *) arg, s, strlen(s) + 1)){
1318 ret = -EFAULT;
1319 } else {
1320 ret = 0;
1321 }
1322 } else
1323 ret = -ENODEV;
1324 up(&dev->sem);
1325 return ret;
1326 case IIOCNETDIF:
1327 /* Delete a network-interface */
1328 if (arg) {
1329 if (copy_from_user(name, (char *) arg, sizeof(name)))
1330 return -EFAULT;
1331 ret = down_interruptible(&dev->sem);
1332 if( ret ) return ret;
1333 ret = isdn_net_rm(name);
1334 up(&dev->sem);
1335 return ret;
1336 } else
1337 return -EINVAL;
1338 case IIOCNETSCF:
1339 /* Set configurable parameters of a network-interface */
1340 if (arg) {
1341 if (copy_from_user((char *) &cfg, (char *) arg, sizeof(cfg)))
1342 return -EFAULT;
1343 return isdn_net_setcfg(&cfg);
1344 } else
1345 return -EINVAL;
1346 case IIOCNETGCF:
1347 /* Get configurable parameters of a network-interface */
1348 if (arg) {
1349 if (copy_from_user((char *) &cfg, (char *) arg, sizeof(cfg)))
1350 return -EFAULT;
1351 if (!(ret = isdn_net_getcfg(&cfg))) {
1352 if (copy_to_user((char *) arg, (char *) &cfg, sizeof(cfg)))
1353 return -EFAULT;
1354 }
1355 return ret;
1356 } else
1357 return -EINVAL;
1358 case IIOCNETANM:
1359 /* Add a phone-number to a network-interface */
1360 if (arg) {
1361 if (copy_from_user((char *) &phone, (char *) arg, sizeof(phone)))
1362 return -EFAULT;
1363 ret = down_interruptible(&dev->sem);
1364 if( ret ) return ret;
1365 ret = isdn_net_addphone(&phone);
1366 up(&dev->sem);
1367 return ret;
1368 } else
1369 return -EINVAL;
1370 case IIOCNETGNM:
1371 /* Get list of phone-numbers of a network-interface */
1372 if (arg) {
1373 if (copy_from_user((char *) &phone, (char *) arg, sizeof(phone)))
1374 return -EFAULT;
1375 ret = down_interruptible(&dev->sem);
1376 if( ret ) return ret;
1377 ret = isdn_net_getphones(&phone, (char *) arg);
1378 up(&dev->sem);
1379 return ret;
1380 } else
1381 return -EINVAL;
1382 case IIOCNETDNM:
1383 /* Delete a phone-number of a network-interface */
1384 if (arg) {
1385 if (copy_from_user((char *) &phone, (char *) arg, sizeof(phone)))
1386 return -EFAULT;
1387 ret = down_interruptible(&dev->sem);
1388 if( ret ) return ret;
1389 ret = isdn_net_delphone(&phone);
1390 up(&dev->sem);
1391 return ret;
1392 } else
1393 return -EINVAL;
1394 case IIOCNETDIL:
1395 /* Force dialing of a network-interface */
1396 if (arg) {
1397 if (copy_from_user(name, (char *) arg, sizeof(name)))
1398 return -EFAULT;
1399 return isdn_net_force_dial(name);
1400 } else
1401 return -EINVAL;
1402 #ifdef CONFIG_ISDN_PPP
1403 case IIOCNETALN:
1404 if (!arg)
1405 return -EINVAL;
1406 if (copy_from_user(name, (char *) arg, sizeof(name)))
1407 return -EFAULT;
1408 return isdn_ppp_dial_slave(name);
1409 case IIOCNETDLN:
1410 if (!arg)
1411 return -EINVAL;
1412 if (copy_from_user(name, (char *) arg, sizeof(name)))
1413 return -EFAULT;
1414 return isdn_ppp_hangup_slave(name);
1415 #endif
1416 case IIOCNETHUP:
1417 /* Force hangup of a network-interface */
1418 if (!arg)
1419 return -EINVAL;
1420 if (copy_from_user(name, (char *) arg, sizeof(name)))
1421 return -EFAULT;
1422 return isdn_net_force_hangup(name);
1423 break;
1424 #endif /* CONFIG_NETDEVICES */
1425 case IIOCSETVER:
1426 dev->net_verbose = arg;
1427 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1428 return 0;
1429 case IIOCSETGST:
1430 if (arg)
1431 dev->global_flags |= ISDN_GLOBAL_STOPPED;
1432 else
1433 dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1434 printk(KERN_INFO "isdn: Global Mode %s\n",
1435 (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1436 return 0;
1437 case IIOCSETBRJ:
1438 drvidx = -1;
1439 if (arg) {
1440 int i;
1441 char *p;
1442 if (copy_from_user((char *) &iocts, (char *) arg,
1443 sizeof(isdn_ioctl_struct)))
1444 return -EFAULT;
1445 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1446 if (strlen(iocts.drvid)) {
1447 if ((p = strchr(iocts.drvid, ',')))
1448 *p = 0;
1449 drvidx = -1;
1450 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1451 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1452 drvidx = i;
1453 break;
1454 }
1455 }
1456 }
1457 if (drvidx == -1)
1458 return -ENODEV;
1459 if (iocts.arg)
1460 dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
1461 else
1462 dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
1463 return 0;
1464 case IIOCSIGPRF:
1465 dev->profd = current;
1466 return 0;
1467 break;
1468 case IIOCGETPRF:
1469 /* Get all Modem-Profiles */
1470 if (arg) {
1471 char *p = (char *) arg;
1472 int i;
1473
1474 if ((ret = verify_area(VERIFY_WRITE, (void *) arg,
1475 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1476 * ISDN_MAX_CHANNELS)))
1477 return ret;
1478
1479 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1480 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1481 ISDN_MODEM_NUMREG))
1482 return -EFAULT;
1483 p += ISDN_MODEM_NUMREG;
1484 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1485 return -EFAULT;
1486 p += ISDN_MSNLEN;
1487 if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
1488 return -EFAULT;
1489 p += ISDN_LMSNLEN;
1490 }
1491 return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
1492 } else
1493 return -EINVAL;
1494 break;
1495 case IIOCSETPRF:
1496 /* Set all Modem-Profiles */
1497 if (arg) {
1498 char *p = (char *) arg;
1499 int i;
1500
1501 if ((ret = verify_area(VERIFY_READ, (void *) arg,
1502 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1503 * ISDN_MAX_CHANNELS)))
1504 return ret;
1505
1506 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1507 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1508 ISDN_MODEM_NUMREG))
1509 return -EFAULT;
1510 p += ISDN_MODEM_NUMREG;
1511 if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
1512 return -EFAULT;
1513 p += ISDN_LMSNLEN;
1514 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1515 return -EFAULT;
1516 p += ISDN_MSNLEN;
1517 }
1518 return 0;
1519 } else
1520 return -EINVAL;
1521 break;
1522 case IIOCSETMAP:
1523 case IIOCGETMAP:
1524 /* Set/Get MSN->EAZ-Mapping for a driver */
1525 if (arg) {
1526
1527 if (copy_from_user((char *) &iocts,
1528 (char *) arg,
1529 sizeof(isdn_ioctl_struct)))
1530 return -EFAULT;
1531 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1532 if (strlen(iocts.drvid)) {
1533 drvidx = -1;
1534 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1535 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1536 drvidx = i;
1537 break;
1538 }
1539 } else
1540 drvidx = 0;
1541 if (drvidx == -1)
1542 return -ENODEV;
1543 if (cmd == IIOCSETMAP) {
1544 int loop = 1;
1545
1546 p = (char *) iocts.arg;
1547 i = 0;
1548 while (loop) {
1549 int j = 0;
1550
1551 while (1) {
1552 if ((ret = verify_area(VERIFY_READ, p, 1)))
1553 return ret;
1554 get_user(bname[j], p++);
1555 switch (bname[j]) {
1556 case '\0':
1557 loop = 0;
1558 /* Fall through */
1559 case ',':
1560 bname[j] = '\0';
1561 strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
1562 j = ISDN_MSNLEN;
1563 break;
1564 default:
1565 j++;
1566 }
1567 if (j >= ISDN_MSNLEN)
1568 break;
1569 }
1570 if (++i > 9)
1571 break;
1572 }
1573 } else {
1574 p = (char *) iocts.arg;
1575 for (i = 0; i < 10; i++) {
1576 snprintf(bname, sizeof(bname), "%s%s",
1577 strlen(dev->drv[drvidx]->msn2eaz[i]) ?
1578 dev->drv[drvidx]->msn2eaz[i] : "_",
1579 (i < 9) ? "," : "\0");
1580 if (copy_to_user(p, bname, strlen(bname) + 1))
1581 return -EFAULT;
1582 p += strlen(bname);
1583 }
1584 }
1585 return 0;
1586 } else
1587 return -EINVAL;
1588 case IIOCDBGVAR:
1589 if (arg) {
1590 if (copy_to_user((char *) arg, (char *) &dev, sizeof(ulong)))
1591 return -EFAULT;
1592 return 0;
1593 } else
1594 return -EINVAL;
1595 break;
1596 default:
1597 if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
1598 cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
1599 else
1600 return -EINVAL;
1601 if (arg) {
1602 int i;
1603 char *p;
1604 if (copy_from_user((char *) &iocts, (char *) arg, sizeof(isdn_ioctl_struct)))
1605 return -EFAULT;
1606 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1607 if (strlen(iocts.drvid)) {
1608 if ((p = strchr(iocts.drvid, ',')))
1609 *p = 0;
1610 drvidx = -1;
1611 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1612 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1613 drvidx = i;
1614 break;
1615 }
1616 } else
1617 drvidx = 0;
1618 if (drvidx == -1)
1619 return -ENODEV;
1620 if ((ret = verify_area(VERIFY_WRITE, (void *) arg,
1621 sizeof(isdn_ioctl_struct))))
1622 return ret;
1623 c.driver = drvidx;
1624 c.command = ISDN_CMD_IOCTL;
1625 c.arg = cmd;
1626 memcpy(c.parm.num, (char *) &iocts.arg, sizeof(ulong));
1627 ret = isdn_command(&c);
1628 memcpy((char *) &iocts.arg, c.parm.num, sizeof(ulong));
1629 if (copy_to_user((char *) arg, &iocts, sizeof(isdn_ioctl_struct)))
1630 return -EFAULT;
1631 return ret;
1632 } else
1633 return -EINVAL;
1634 }
1635 }
1636 #ifdef CONFIG_ISDN_PPP
1637 if (minor <= ISDN_MINOR_PPPMAX)
1638 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1639 #endif
1640 return -ENODEV;
1641
1642 #undef name
1643 #undef bname
1644 #undef iocts
1645 #undef phone
1646 #undef cfg
1647 }
1648
1649 /*
1650 * Open the device code.
1651 */
1652 static int
isdn_open(struct inode * ino,struct file * filep)1653 isdn_open(struct inode *ino, struct file *filep)
1654 {
1655 uint minor = MINOR(ino->i_rdev);
1656 int drvidx;
1657 int chidx;
1658 int retval = -ENODEV;
1659
1660
1661 if (minor == ISDN_MINOR_STATUS) {
1662 infostruct *p;
1663
1664 if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1665 p->next = (char *) dev->infochain;
1666 p->private = (char *) &(filep->private_data);
1667 dev->infochain = p;
1668 /* At opening we allow a single update */
1669 filep->private_data = (char *) 1;
1670 retval = 0;
1671 goto out;
1672 } else {
1673 retval = -ENOMEM;
1674 goto out;
1675 }
1676 }
1677 if (!dev->channels)
1678 goto out;
1679 if (minor <= ISDN_MINOR_BMAX) {
1680 printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
1681 drvidx = isdn_minor2drv(minor);
1682 if (drvidx < 0)
1683 goto out;
1684 chidx = isdn_minor2chan(minor);
1685 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1686 goto out;
1687 if (!(dev->drv[drvidx]->online & (1 << chidx)))
1688 goto out;
1689 isdn_lock_drivers();
1690 retval = 0;
1691 goto out;
1692 }
1693 if (minor <= ISDN_MINOR_CTRLMAX) {
1694 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1695 if (drvidx < 0)
1696 goto out;
1697 isdn_lock_drivers();
1698 retval = 0;
1699 goto out;
1700 }
1701 #ifdef CONFIG_ISDN_PPP
1702 if (minor <= ISDN_MINOR_PPPMAX) {
1703 retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
1704 if (retval == 0)
1705 isdn_lock_drivers();
1706 goto out;
1707 }
1708 #endif
1709 out:
1710 return retval;
1711 }
1712
1713 static int
isdn_close(struct inode * ino,struct file * filep)1714 isdn_close(struct inode *ino, struct file *filep)
1715 {
1716 uint minor = MINOR(ino->i_rdev);
1717
1718 lock_kernel();
1719 if (minor == ISDN_MINOR_STATUS) {
1720 infostruct *p = dev->infochain;
1721 infostruct *q = NULL;
1722
1723 while (p) {
1724 if (p->private == (char *) &(filep->private_data)) {
1725 if (q)
1726 q->next = p->next;
1727 else
1728 dev->infochain = (infostruct *) (p->next);
1729 kfree(p);
1730 goto out;
1731 }
1732 q = p;
1733 p = (infostruct *) (p->next);
1734 }
1735 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1736 goto out;
1737 }
1738 isdn_unlock_drivers();
1739 if (minor <= ISDN_MINOR_BMAX)
1740 goto out;
1741 if (minor <= ISDN_MINOR_CTRLMAX) {
1742 if (dev->profd == current)
1743 dev->profd = NULL;
1744 goto out;
1745 }
1746 #ifdef CONFIG_ISDN_PPP
1747 if (minor <= ISDN_MINOR_PPPMAX)
1748 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1749 #endif
1750
1751 out:
1752 unlock_kernel();
1753 return 0;
1754 }
1755
1756 static struct file_operations isdn_fops =
1757 {
1758 owner: THIS_MODULE,
1759 llseek: no_llseek,
1760 read: isdn_read,
1761 write: isdn_write,
1762 poll: isdn_poll,
1763 ioctl: isdn_ioctl,
1764 open: isdn_open,
1765 release: isdn_close,
1766 };
1767
1768 char *
isdn_map_eaz2msn(char * msn,int di)1769 isdn_map_eaz2msn(char *msn, int di)
1770 {
1771 driver *this = dev->drv[di];
1772 int i;
1773
1774 if (strlen(msn) == 1) {
1775 i = msn[0] - '0';
1776 if ((i >= 0) && (i <= 9))
1777 if (strlen(this->msn2eaz[i]))
1778 return (this->msn2eaz[i]);
1779 }
1780 return (msn);
1781 }
1782
1783 /*
1784 * Find an unused ISDN-channel, whose feature-flags match the
1785 * given L2- and L3-protocols.
1786 */
1787 #define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038))
1788
1789 int
isdn_get_free_channel(int usage,int l2_proto,int l3_proto,int pre_dev,int pre_chan,char * msn)1790 isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1791 ,int pre_chan, char *msn)
1792 {
1793 int i;
1794 ulong flags;
1795 ulong features;
1796 ulong vfeatures;
1797
1798 save_flags(flags);
1799 cli();
1800 features = ((1 << l2_proto) | (0x10000 << l3_proto));
1801 vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1802 ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038));
1803 /* If Layer-2 protocol is V.110, accept drivers with
1804 * transparent feature even if these don't support V.110
1805 * because we can emulate this in linklevel.
1806 */
1807 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1808 if (USG_NONE(dev->usage[i]) &&
1809 (dev->drvmap[i] != -1)) {
1810 int d = dev->drvmap[i];
1811 if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1812 ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1813 continue;
1814 if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
1815 continue;
1816 if (dev->usage[i] & ISDN_USAGE_DISABLED)
1817 continue; /* usage not allowed */
1818 if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
1819 if (((dev->drv[d]->interface->features & features) == features) ||
1820 (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1821 (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1822 if ((pre_dev < 0) || (pre_chan < 0)) {
1823 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1824 dev->usage[i] |= usage;
1825 isdn_info_update();
1826 restore_flags(flags);
1827 return i;
1828 } else {
1829 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1830 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1831 dev->usage[i] |= usage;
1832 isdn_info_update();
1833 restore_flags(flags);
1834 return i;
1835 }
1836 }
1837 }
1838 }
1839 }
1840 restore_flags(flags);
1841 return -1;
1842 }
1843
1844 /*
1845 * Set state of ISDN-channel to 'unused'
1846 */
1847 void
isdn_free_channel(int di,int ch,int usage)1848 isdn_free_channel(int di, int ch, int usage)
1849 {
1850 int i;
1851 ulong flags;
1852
1853 save_flags(flags);
1854 cli();
1855 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1856 if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
1857 (dev->drvmap[i] == di) &&
1858 (dev->chanmap[i] == ch)) {
1859 dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1860 strcpy(dev->num[i], "???");
1861 dev->ibytes[i] = 0;
1862 dev->obytes[i] = 0;
1863 // 20.10.99 JIM, try to reinitialize v110 !
1864 dev->v110emu[i] = 0;
1865 atomic_set(&(dev->v110use[i]), 0);
1866 isdn_v110_close(dev->v110[i]);
1867 dev->v110[i] = NULL;
1868 // 20.10.99 JIM, try to reinitialize v110 !
1869 isdn_info_update();
1870 skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
1871 }
1872 restore_flags(flags);
1873 }
1874
1875 /*
1876 * Cancel Exclusive-Flag for ISDN-channel
1877 */
1878 void
isdn_unexclusive_channel(int di,int ch)1879 isdn_unexclusive_channel(int di, int ch)
1880 {
1881 int i;
1882 ulong flags;
1883
1884 save_flags(flags);
1885 cli();
1886 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1887 if ((dev->drvmap[i] == di) &&
1888 (dev->chanmap[i] == ch)) {
1889 dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1890 isdn_info_update();
1891 restore_flags(flags);
1892 return;
1893 }
1894 restore_flags(flags);
1895 }
1896
1897 /*
1898 * writebuf replacement for SKB_ABLE drivers
1899 */
1900 static int
isdn_writebuf_stub(int drvidx,int chan,const u_char * buf,int len,int user)1901 isdn_writebuf_stub(int drvidx, int chan, const u_char * buf, int len,
1902 int user)
1903 {
1904 int ret;
1905 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1906 struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1907
1908 if (!skb)
1909 return 0;
1910 skb_reserve(skb, hl);
1911 if (user)
1912 copy_from_user(skb_put(skb, len), buf, len);
1913 else
1914 memcpy(skb_put(skb, len), buf, len);
1915 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
1916 if (ret <= 0)
1917 dev_kfree_skb(skb);
1918 if (ret > 0)
1919 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
1920 return ret;
1921 }
1922
1923 /*
1924 * Return: length of data on success, -ERRcode on failure.
1925 */
1926 int
isdn_writebuf_skb_stub(int drvidx,int chan,int ack,struct sk_buff * skb)1927 isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
1928 {
1929 int ret;
1930 struct sk_buff *nskb = NULL;
1931 int v110_ret = skb->len;
1932 int idx = isdn_dc2minor(drvidx, chan);
1933
1934 if (dev->v110[idx]) {
1935 atomic_inc(&dev->v110use[idx]);
1936 nskb = isdn_v110_encode(dev->v110[idx], skb);
1937 atomic_dec(&dev->v110use[idx]);
1938 if (!nskb)
1939 return 0;
1940 v110_ret = *((int *)nskb->data);
1941 skb_pull(nskb, sizeof(int));
1942 if (!nskb->len) {
1943 dev_kfree_skb(nskb);
1944 return v110_ret;
1945 }
1946 /* V.110 must always be acknowledged */
1947 ack = 1;
1948 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
1949 } else {
1950 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1951
1952 if( skb_headroom(skb) < hl ){
1953 /*
1954 * This should only occur when new HL driver with
1955 * increased hl_hdrlen was loaded after netdevice
1956 * was created and connected to the new driver.
1957 *
1958 * The V.110 branch (re-allocates on its own) does
1959 * not need this
1960 */
1961 struct sk_buff * skb_tmp;
1962
1963 skb_tmp = skb_realloc_headroom(skb, hl);
1964 printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
1965 if (!skb_tmp) return -ENOMEM; /* 0 better? */
1966 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
1967 if( ret > 0 ){
1968 dev_kfree_skb(skb);
1969 } else {
1970 dev_kfree_skb(skb_tmp);
1971 }
1972 } else {
1973 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
1974 }
1975 }
1976 if (ret > 0) {
1977 dev->obytes[idx] += ret;
1978 if (dev->v110[idx]) {
1979 atomic_inc(&dev->v110use[idx]);
1980 dev->v110[idx]->skbuser++;
1981 atomic_dec(&dev->v110use[idx]);
1982 /* For V.110 return unencoded data length */
1983 ret = v110_ret;
1984 /* if the complete frame was send we free the skb;
1985 if not upper function will requeue the skb */
1986 if (ret == skb->len)
1987 dev_kfree_skb(skb);
1988 }
1989 } else
1990 if (dev->v110[idx])
1991 dev_kfree_skb(nskb);
1992 return ret;
1993 }
1994
1995 int
isdn_add_channels(driver * d,int drvidx,int n,int adding)1996 isdn_add_channels(driver *d, int drvidx, int n, int adding)
1997 {
1998 int j, k, m;
1999 ulong flags;
2000
2001 init_waitqueue_head(&d->st_waitq);
2002 if (d->flags & DRV_FLAG_RUNNING)
2003 return -1;
2004 if (n < 1) return 0;
2005
2006 m = (adding) ? d->channels + n : n;
2007
2008 if (dev->channels + n > ISDN_MAX_CHANNELS) {
2009 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
2010 ISDN_MAX_CHANNELS);
2011 return -1;
2012 }
2013
2014 if ((adding) && (d->rcverr))
2015 kfree(d->rcverr);
2016 if (!(d->rcverr = kmalloc(sizeof(int) * m, GFP_KERNEL))) {
2017 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
2018 return -1;
2019 }
2020 memset((char *) d->rcverr, 0, sizeof(int) * m);
2021
2022 if ((adding) && (d->rcvcount))
2023 kfree(d->rcvcount);
2024 if (!(d->rcvcount = kmalloc(sizeof(int) * m, GFP_KERNEL))) {
2025 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
2026 if (!adding) kfree(d->rcverr);
2027 return -1;
2028 }
2029 memset((char *) d->rcvcount, 0, sizeof(int) * m);
2030
2031 if ((adding) && (d->rpqueue)) {
2032 for (j = 0; j < d->channels; j++)
2033 skb_queue_purge(&d->rpqueue[j]);
2034 kfree(d->rpqueue);
2035 }
2036 if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_KERNEL))) {
2037 printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
2038 if (!adding) {
2039 kfree(d->rcvcount);
2040 kfree(d->rcverr);
2041 }
2042 return -1;
2043 }
2044 for (j = 0; j < m; j++) {
2045 skb_queue_head_init(&d->rpqueue[j]);
2046 }
2047
2048 if ((adding) && (d->rcv_waitq))
2049 kfree(d->rcv_waitq);
2050 d->rcv_waitq = kmalloc(sizeof(wait_queue_head_t) * 2 * m, GFP_KERNEL);
2051 if (!d->rcv_waitq) {
2052 printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
2053 if (!adding) {
2054 kfree(d->rpqueue);
2055 kfree(d->rcvcount);
2056 kfree(d->rcverr);
2057 }
2058 return -1;
2059 }
2060 d->snd_waitq = d->rcv_waitq + m;
2061 for (j = 0; j < m; j++) {
2062 init_waitqueue_head(&d->rcv_waitq[j]);
2063 init_waitqueue_head(&d->snd_waitq[j]);
2064 }
2065
2066 dev->channels += n;
2067 save_flags(flags);
2068 cli();
2069 for (j = d->channels; j < m; j++)
2070 for (k = 0; k < ISDN_MAX_CHANNELS; k++)
2071 if (dev->chanmap[k] < 0) {
2072 dev->chanmap[k] = j;
2073 dev->drvmap[k] = drvidx;
2074 isdn_register_devfs(k);
2075 break;
2076 }
2077 restore_flags(flags);
2078 d->channels = m;
2079 return 0;
2080 }
2081
2082 /*
2083 * Low-level-driver registration
2084 */
2085
2086 static void
set_global_features(void)2087 set_global_features(void)
2088 {
2089 int drvidx;
2090
2091 dev->global_features = 0;
2092 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
2093 if (!dev->drv[drvidx])
2094 continue;
2095 if (dev->drv[drvidx]->interface)
2096 dev->global_features |= dev->drv[drvidx]->interface->features;
2097 }
2098 }
2099
2100 #ifdef CONFIG_ISDN_DIVERSION
2101
map_drvname(int di)2102 static char *map_drvname(int di)
2103 {
2104 if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
2105 return(NULL);
2106 return(dev->drvid[di]); /* driver name */
2107 } /* map_drvname */
2108
map_namedrv(char * id)2109 static int map_namedrv(char *id)
2110 { int i;
2111
2112 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2113 { if (!strcmp(dev->drvid[i],id))
2114 return(i);
2115 }
2116 return(-1);
2117 } /* map_namedrv */
2118
DIVERT_REG_NAME(isdn_divert_if * i_div)2119 int DIVERT_REG_NAME(isdn_divert_if *i_div)
2120 {
2121 if (i_div->if_magic != DIVERT_IF_MAGIC)
2122 return(DIVERT_VER_ERR);
2123 switch (i_div->cmd)
2124 {
2125 case DIVERT_CMD_REL:
2126 if (divert_if != i_div)
2127 return(DIVERT_REL_ERR);
2128 divert_if = NULL; /* free interface */
2129 MOD_DEC_USE_COUNT;
2130 return(DIVERT_NO_ERR);
2131
2132 case DIVERT_CMD_REG:
2133 if (divert_if)
2134 return(DIVERT_REG_ERR);
2135 i_div->ll_cmd = isdn_command; /* set command function */
2136 i_div->drv_to_name = map_drvname;
2137 i_div->name_to_drv = map_namedrv;
2138 MOD_INC_USE_COUNT;
2139 divert_if = i_div; /* remember interface */
2140 return(DIVERT_NO_ERR);
2141
2142 default:
2143 return(DIVERT_CMD_ERR);
2144 }
2145 } /* DIVERT_REG_NAME */
2146
2147 EXPORT_SYMBOL(DIVERT_REG_NAME);
2148
2149 #endif /* CONFIG_ISDN_DIVERSION */
2150
2151
2152 EXPORT_SYMBOL(register_isdn);
2153 #ifdef CONFIG_ISDN_PPP
2154 EXPORT_SYMBOL(isdn_ppp_register_compressor);
2155 EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
2156 #endif
2157
2158 int
register_isdn(isdn_if * i)2159 register_isdn(isdn_if * i)
2160 {
2161 driver *d;
2162 int j;
2163 ulong flags;
2164 int drvidx;
2165
2166 if (dev->drivers >= ISDN_MAX_DRIVERS) {
2167 printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
2168 ISDN_MAX_DRIVERS);
2169 return 0;
2170 }
2171 if (!i->writebuf_skb) {
2172 printk(KERN_WARNING "register_isdn: No write routine given.\n");
2173 return 0;
2174 }
2175 if (!(d = kmalloc(sizeof(driver), GFP_KERNEL))) {
2176 printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
2177 return 0;
2178 }
2179 memset((char *) d, 0, sizeof(driver));
2180
2181 d->maxbufsize = i->maxbufsize;
2182 d->pktcount = 0;
2183 d->stavail = 0;
2184 d->flags = DRV_FLAG_LOADED;
2185 d->online = 0;
2186 d->interface = i;
2187 d->channels = 0;
2188 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2189 if (!dev->drv[drvidx])
2190 break;
2191 if (isdn_add_channels(d, drvidx, i->channels, 0)) {
2192 kfree(d);
2193 return 0;
2194 }
2195 i->channels = drvidx;
2196 i->rcvcallb_skb = isdn_receive_skb_callback;
2197 i->statcallb = isdn_status_callback;
2198 if (!strlen(i->id))
2199 sprintf(i->id, "line%d", drvidx);
2200 save_flags(flags);
2201 cli();
2202 for (j = 0; j < drvidx; j++)
2203 if (!strcmp(i->id, dev->drvid[j]))
2204 sprintf(i->id, "line%d", drvidx);
2205 dev->drv[drvidx] = d;
2206 strcpy(dev->drvid[drvidx], i->id);
2207 isdn_info_update();
2208 dev->drivers++;
2209 set_global_features();
2210 restore_flags(flags);
2211 return 1;
2212 }
2213
2214 /*
2215 *****************************************************************************
2216 * And now the modules code.
2217 *****************************************************************************
2218 */
2219
2220 static char *
isdn_getrev(const char * revision)2221 isdn_getrev(const char *revision)
2222 {
2223 char *rev;
2224 char *p;
2225
2226 if ((p = strchr(revision, ':'))) {
2227 rev = p + 2;
2228 p = strchr(rev, '$');
2229 *--p = 0;
2230 } else
2231 rev = "???";
2232 return rev;
2233 }
2234
2235 #ifdef CONFIG_DEVFS_FS
2236
2237 static devfs_handle_t devfs_handle;
2238
isdn_register_devfs(int k)2239 static void isdn_register_devfs(int k)
2240 {
2241 char buf[11];
2242
2243 sprintf (buf, "isdn%d", k);
2244 dev->devfs_handle_isdnX[k] =
2245 devfs_register (devfs_handle, buf, DEVFS_FL_DEFAULT,
2246 ISDN_MAJOR, ISDN_MINOR_B + k,0600 | S_IFCHR,
2247 &isdn_fops, NULL);
2248 sprintf (buf, "isdnctrl%d", k);
2249 dev->devfs_handle_isdnctrlX[k] =
2250 devfs_register (devfs_handle, buf, DEVFS_FL_DEFAULT,
2251 ISDN_MAJOR, ISDN_MINOR_CTRL + k, 0600 | S_IFCHR,
2252 &isdn_fops, NULL);
2253 }
2254
isdn_unregister_devfs(int k)2255 static void isdn_unregister_devfs(int k)
2256 {
2257 devfs_unregister (dev->devfs_handle_isdnX[k]);
2258 devfs_unregister (dev->devfs_handle_isdnctrlX[k]);
2259 }
2260
isdn_init_devfs(void)2261 static void isdn_init_devfs(void)
2262 {
2263 # ifdef CONFIG_ISDN_PPP
2264 int i;
2265 # endif
2266
2267 devfs_handle = devfs_mk_dir (NULL, "isdn", NULL);
2268 # ifdef CONFIG_ISDN_PPP
2269 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2270 char buf[8];
2271
2272 sprintf (buf, "ippp%d", i);
2273 dev->devfs_handle_ipppX[i] =
2274 devfs_register (devfs_handle, buf, DEVFS_FL_DEFAULT,
2275 ISDN_MAJOR, ISDN_MINOR_PPP + i,
2276 0600 | S_IFCHR, &isdn_fops, NULL);
2277 }
2278 # endif
2279
2280 dev->devfs_handle_isdninfo =
2281 devfs_register (devfs_handle, "isdninfo", DEVFS_FL_DEFAULT,
2282 ISDN_MAJOR, ISDN_MINOR_STATUS, 0600 | S_IFCHR,
2283 &isdn_fops, NULL);
2284 dev->devfs_handle_isdnctrl =
2285 devfs_register (devfs_handle, "isdnctrl", DEVFS_FL_DEFAULT,
2286 ISDN_MAJOR, ISDN_MINOR_CTRL, 0600 | S_IFCHR,
2287 &isdn_fops, NULL);
2288 }
2289
isdn_cleanup_devfs(void)2290 static void isdn_cleanup_devfs(void)
2291 {
2292 # ifdef CONFIG_ISDN_PPP
2293 int i;
2294 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
2295 devfs_unregister (dev->devfs_handle_ipppX[i]);
2296 # endif
2297 devfs_unregister (dev->devfs_handle_isdninfo);
2298 devfs_unregister (dev->devfs_handle_isdnctrl);
2299 devfs_unregister (devfs_handle);
2300 }
2301
2302 #else /* CONFIG_DEVFS_FS */
isdn_register_devfs(int dummy)2303 static void isdn_register_devfs(int dummy)
2304 {
2305 return;
2306 }
2307
isdn_unregister_devfs(int dummy)2308 static void isdn_unregister_devfs(int dummy)
2309 {
2310 return;
2311 }
2312
isdn_init_devfs(void)2313 static void isdn_init_devfs(void)
2314 {
2315 return;
2316 }
2317
isdn_cleanup_devfs(void)2318 static void isdn_cleanup_devfs(void)
2319 {
2320 return;
2321 }
2322
2323 #endif /* CONFIG_DEVFS_FS */
2324
2325 /*
2326 * Allocate and initialize all data, register modem-devices
2327 */
isdn_init(void)2328 static int __init isdn_init(void)
2329 {
2330 int i;
2331 char tmprev[50];
2332
2333 if (!(dev = (isdn_dev *) vmalloc(sizeof(isdn_dev)))) {
2334 printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
2335 return -EIO;
2336 }
2337 memset((char *) dev, 0, sizeof(isdn_dev));
2338 init_timer(&dev->timer);
2339 dev->timer.function = isdn_timer_funct;
2340 init_MUTEX(&dev->sem);
2341 init_waitqueue_head(&dev->info_waitq);
2342 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2343 dev->drvmap[i] = -1;
2344 dev->chanmap[i] = -1;
2345 dev->m_idx[i] = -1;
2346 strcpy(dev->num[i], "???");
2347 init_waitqueue_head(&dev->mdm.info[i].open_wait);
2348 init_waitqueue_head(&dev->mdm.info[i].close_wait);
2349 }
2350 if (devfs_register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
2351 printk(KERN_WARNING "isdn: Could not register control devices\n");
2352 vfree(dev);
2353 return -EIO;
2354 }
2355 isdn_init_devfs();
2356 if ((i = isdn_tty_modem_init()) < 0) {
2357 printk(KERN_WARNING "isdn: Could not register tty devices\n");
2358 if (i == -3)
2359 tty_unregister_driver(&dev->mdm.cua_modem);
2360 if (i <= -2)
2361 tty_unregister_driver(&dev->mdm.tty_modem);
2362 vfree(dev);
2363 isdn_cleanup_devfs();
2364 devfs_unregister_chrdev(ISDN_MAJOR, "isdn");
2365 return -EIO;
2366 }
2367 #ifdef CONFIG_ISDN_PPP
2368 if (isdn_ppp_init() < 0) {
2369 printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
2370 tty_unregister_driver(&dev->mdm.tty_modem);
2371 tty_unregister_driver(&dev->mdm.cua_modem);
2372 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
2373 kfree(dev->mdm.info[i].xmit_buf - 4);
2374 isdn_cleanup_devfs();
2375 devfs_unregister_chrdev(ISDN_MAJOR, "isdn");
2376 vfree(dev);
2377 return -EIO;
2378 }
2379 #endif /* CONFIG_ISDN_PPP */
2380
2381 strcpy(tmprev, isdn_revision);
2382 printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
2383 strcpy(tmprev, isdn_tty_revision);
2384 printk("%s/", isdn_getrev(tmprev));
2385 strcpy(tmprev, isdn_net_revision);
2386 printk("%s/", isdn_getrev(tmprev));
2387 strcpy(tmprev, isdn_ppp_revision);
2388 printk("%s/", isdn_getrev(tmprev));
2389 strcpy(tmprev, isdn_audio_revision);
2390 printk("%s/", isdn_getrev(tmprev));
2391 strcpy(tmprev, isdn_v110_revision);
2392 printk("%s", isdn_getrev(tmprev));
2393
2394 #ifdef MODULE
2395 printk(" loaded\n");
2396 #else
2397 printk("\n");
2398 #endif
2399 isdn_info_update();
2400 return 0;
2401 }
2402
2403 /*
2404 * Unload module
2405 */
isdn_exit(void)2406 static void __exit isdn_exit(void)
2407 {
2408 unsigned long flags;
2409 int i;
2410
2411 #ifdef CONFIG_ISDN_PPP
2412 isdn_ppp_cleanup();
2413 #endif
2414 save_flags(flags);
2415 cli();
2416 if (isdn_net_rmall() < 0) {
2417 printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
2418 restore_flags(flags);
2419 return;
2420 }
2421 if (tty_unregister_driver(&dev->mdm.tty_modem)) {
2422 printk(KERN_WARNING "isdn: ttyI-device busy, remove cancelled\n");
2423 restore_flags(flags);
2424 return;
2425 }
2426 if (tty_unregister_driver(&dev->mdm.cua_modem)) {
2427 printk(KERN_WARNING "isdn: cui-device busy, remove cancelled\n");
2428 restore_flags(flags);
2429 return;
2430 }
2431 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2432 isdn_tty_cleanup_xmit(&dev->mdm.info[i]);
2433 kfree(dev->mdm.info[i].xmit_buf - 4);
2434 #ifdef CONFIG_ISDN_TTY_FAX
2435 kfree(dev->mdm.info[i].fax);
2436 #endif
2437 }
2438 if (devfs_unregister_chrdev(ISDN_MAJOR, "isdn") != 0) {
2439 printk(KERN_WARNING "isdn: controldevice busy, remove cancelled\n");
2440 restore_flags(flags);
2441 } else {
2442 isdn_cleanup_devfs();
2443 del_timer(&dev->timer);
2444 restore_flags(flags);
2445 /* call vfree with interrupts enabled, else it will hang */
2446 vfree(dev);
2447 printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
2448 }
2449 }
2450
2451 module_init(isdn_init);
2452 module_exit(isdn_exit);
2453