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2.2.0-final
[davej-history.git] / drivers / isdn / isdn_common.c
blob92e2ee5449634f720fe6dd68903f668f85db349d
1 /* $Id: isdn_common.c,v 1.55 1998/02/23 23:35:32 fritz Exp $
2
3 * Linux ISDN subsystem, common used functions (linklevel).
4 *
5 * Copyright 1994,95,96 by Fritz Elfert (fritz@wuemaus.franken.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 program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
12 * any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * Note: This file differs from the corresponding revision as present in the
24 * isdn4linux CVS repository because some later bug fixes have been extracted
25 * from the repository and merged into this file. -- Henner Eisen
26 *
27 * $Log: isdn_common.c,v $
28 * Revision 1.55 1998/02/23 23:35:32 fritz
29 * Eliminated some compiler warnings.
30 *
31 * Revision 1.54 1998/02/22 19:44:19 fritz
32 * Bugfixes and improvements regarding V.110, V.110 now running.
33 *
34 * Revision 1.53 1998/02/20 17:18:05 fritz
35 * Changes for recent kernels.
36 * Added common stub for sending commands to lowlevel.
37 * Added V.110.
38 *
39 * Revision 1.52 1998/01/31 22:05:57 keil
40 * Lots of changes for X.25 support:
41 * Added generic support for connection-controlling encapsulation protocols
42 * Added support of BHUP status message
43 * Added support for additional p_encap X25IFACE
44 * Added support for kernels >= 2.1.72
45 *
46 * Revision 1.51 1998/01/31 19:17:29 calle
47 * merged changes from and for 2.1.82
48 *
49 * Revision 1.50 1997/12/12 06:12:11 calle
50 * moved EXPORT_SYMBOL(register_isdn) from isdn_syms.c to isdn_common.c
51 *
52 * Revision 1.49 1997/11/06 17:16:52 keil
53 * Sync to 2.1.62 changes
54 *
55 * Revision 1.48 1997/11/02 23:55:50 keil
56 * Andi Kleen's changes for 2.1.60
57 * without it the isdninfo and isdnctrl devices won't work
58 *
59 * Revision 1.47 1997/10/09 21:28:46 fritz
60 * New HL<->LL interface:
61 * New BSENT callback with nr. of bytes included.
62 * Sending without ACK.
63 * New L1 error status (not yet in use).
64 * Cleaned up obsolete structures.
65 * Implemented Cisco-SLARP.
66 * Changed local net-interface data to be dynamically allocated.
67 * Removed old 2.0 compatibility stuff.
68 *
69 * Revision 1.46 1997/10/01 09:20:27 fritz
70 * Removed old compatibility stuff for 2.0.X kernels.
71 * From now on, this code is for 2.1.X ONLY!
72 * Old stuff is still in the separate branch.
73 *
74 * Revision 1.45 1997/08/21 23:11:41 fritz
75 * Added changes for kernels >= 2.1.45
76 *
77 * Revision 1.44 1997/05/27 15:17:23 fritz
78 * Added changes for recent 2.1.x kernels:
79 * changed return type of isdn_close
80 * queue_task_* -> queue_task
81 * clear/set_bit -> test_and_... where apropriate.
82 * changed type of hard_header_cache parameter.
83 *
84 * Revision 1.43 1997/03/31 14:09:43 fritz
85 * Fixed memory leak in isdn_close().
86 *
87 * Revision 1.42 1997/03/30 16:51:08 calle
88 * changed calls to copy_from_user/copy_to_user and removed verify_area
89 * were possible.
90 *
91 * Revision 1.41 1997/03/24 22:54:41 fritz
92 * Some small fixes in debug code.
93 *
94 * Revision 1.40 1997/03/08 08:13:51 fritz
95 * Bugfix: IIOCSETMAP (Set mapping) was broken.
96 *
97 * Revision 1.39 1997/03/07 01:32:54 fritz
98 * Added proper ifdef's for CONFIG_ISDN_AUDIO
99 *
100 * Revision 1.38 1997/03/05 21:15:02 fritz
101 * Fix: reduced stack usage of isdn_ioctl() and isdn_set_allcfg()
102 *
103 * Revision 1.37 1997/03/02 14:29:18 fritz
104 * More ttyI related cleanup.
105 *
106 * Revision 1.36 1997/02/28 02:32:40 fritz
107 * Cleanup: Moved some tty related stuff from isdn_common.c
108 * to isdn_tty.c
109 * Bugfix: Bisync protocol did not behave like documented.
110 *
111 * Revision 1.35 1997/02/21 13:01:19 fritz
112 * Changes CAUSE message output in kernel log.
113 *
114 * Revision 1.34 1997/02/10 20:12:43 fritz
115 * Changed interface for reporting incoming calls.
116 *
117 * Revision 1.33 1997/02/10 10:05:42 fritz
118 * More changes for Kernel 2.1.X
119 * Symbol information moved to isdn_syms.c
120 *
121 * Revision 1.32 1997/02/03 22:55:26 fritz
122 * Reformatted according CodingStyle.
123 * Changed isdn_writebuf_stub static.
124 * Slow down tty-RING counter.
125 * skb->free stuff replaced by macro.
126 * Bugfix in audio-skb locking.
127 * Bugfix in HL-driver locking.
128 *
129 * Revision 1.31 1997/01/17 01:19:18 fritz
130 * Applied chargeint patch.
131 *
132 * Revision 1.30 1997/01/14 01:27:47 fritz
133 * Changed audio receive not to rely on skb->users and skb->lock.
134 * Added ATI2 and related variables.
135 * Started adding full-duplex audio capability.
136 *
137 * Revision 1.29 1997/01/12 23:33:03 fritz
138 * Made isdn_all_eaz foolproof.
139 *
140 * Revision 1.28 1996/11/13 02:33:19 fritz
141 * Fixed a race condition.
142 *
143 * Revision 1.27 1996/10/27 22:02:41 keil
144 * return codes for ISDN_STAT_ICALL
145 *
146 * Revision 1.26 1996/10/23 11:59:40 fritz
147 * More compatibility changes.
148 *
149 * Revision 1.25 1996/10/22 23:13:54 fritz
150 * Changes for compatibility to 2.0.X and 2.1.X kernels.
151 *
152 * Revision 1.24 1996/10/11 14:02:03 fritz
153 * Bugfix: call to isdn_ppp_timer_timeout() never compiled, because of
154 * typo in #ifdef.
155 *
156 * Revision 1.23 1996/06/25 18:35:38 fritz
157 * Fixed bogus memory access in isdn_set_allcfg().
158 *
159 * Revision 1.22 1996/06/24 17:37:37 fritz
160 * Bugfix: isdn_timer_ctrl() did restart timer, even if it
161 * was already running.
162 * lowlevel driver locking did use wrong parameters.
163 *
164 * Revision 1.21 1996/06/15 14:58:20 fritz
165 * Added version signatures for data structures used
166 * by userlevel programs.
167 *
168 * Revision 1.20 1996/06/12 16:01:49 fritz
169 * Bugfix: Remote B-channel hangup sometimes did not result
170 * in a NO CARRIER on tty.
171 *
172 * Revision 1.19 1996/06/11 14:52:04 hipp
173 * minor bugfix in isdn_writebuf_skb_stub()
174 *
175 * Revision 1.18 1996/06/06 14:51:51 fritz
176 * Changed to support DTMF decoding on audio playback also.
177 *
178 * Revision 1.17 1996/06/05 02:24:10 fritz
179 * Added DTMF decoder for audio mode.
180 *
181 * Revision 1.16 1996/06/03 20:09:05 fritz
182 * Bugfix: called wrong function pointer for locking in
183 * isdn_get_free_channel().
184 *
185 * Revision 1.15 1996/05/31 01:10:54 fritz
186 * Bugfixes:
187 * Lowlevel modules did not get locked correctly.
188 * Did show wrong revision when initializing.
189 * Minor fixes in ioctl code.
190 * sk_buff did not get freed, if error in writebuf_stub.
191 *
192 * Revision 1.14 1996/05/18 01:36:55 fritz
193 * Added spelling corrections and some minor changes
194 * to stay in sync with kernel.
195 *
196 * Revision 1.13 1996/05/17 15:43:30 fritz
197 * Bugfix: decrement of rcvcount in readbchan() corrected.
198 *
199 * Revision 1.12 1996/05/17 03:55:43 fritz
200 * Changed DLE handling for audio receive.
201 * Some cleanup.
202 * Added display of isdn_audio_revision.
203 *
204 * Revision 1.11 1996/05/11 21:51:32 fritz
205 * Changed queue management to use sk_buffs.
206 *
207 * Revision 1.10 1996/05/10 08:49:16 fritz
208 * Checkin before major changes of tty-code.
209 *
210 * Revision 1.9 1996/05/07 09:19:41 fritz
211 * Adapted to changes in isdn_tty.c
212 *
213 * Revision 1.8 1996/05/06 11:34:51 hipp
214 * fixed a few bugs
215 *
216 * Revision 1.7 1996/05/02 03:55:17 fritz
217 * Bugfixes:
218 * - B-channel connect message for modem devices
219 * sometimes did not result in a CONNECT-message.
220 * - register_isdn did not check for driverId-conflicts.
221 *
222 * Revision 1.6 1996/04/30 20:57:21 fritz
223 * Commit test
224 *
225 * Revision 1.5 1996/04/20 16:19:07 fritz
226 * Changed slow timer handlers to increase accuracy.
227 * Added statistic information for usage by xisdnload.
228 * Fixed behaviour of isdnctrl-device on non-blocked io.
229 * Fixed all io to go through generic writebuf-function without
230 * bypassing. Same for incoming data.
231 * Fixed bug: Last channel had been unusable.
232 * Fixed kfree of tty xmit_buf on ppp initialization failure.
233 *
234 * Revision 1.4 1996/02/11 02:33:26 fritz
235 * Fixed bug in main timer-dispatcher.
236 * Bugfix: Lot of tty-callbacks got called regardless of the events already
237 * been handled by network-devices.
238 * Changed ioctl-names.
239 *
240 * Revision 1.3 1996/01/22 05:16:11 fritz
241 * Changed ioctl-names.
242 * Fixed bugs in isdn_open and isdn_close regarding PPP_MINOR.
243 *
244 * Revision 1.2 1996/01/21 16:52:40 fritz
245 * Support for sk_buffs added, changed header-stuffing.
246 *
247 * Revision 1.1 1996/01/09 04:12:52 fritz
248 * Initial revision
249 *
250 */
251
252 #include <linux/config.h>
253 #include <linux/module.h>
254 #include <linux/version.h>
255 #include <linux/poll.h>
256 #include <linux/isdn.h>
257 #include "isdn_common.h"
258 #include "isdn_tty.h"
259 #include "isdn_net.h"
260 #include "isdn_ppp.h"
261 #ifdef CONFIG_ISDN_AUDIO
262 #include "isdn_audio.h"
263 #endif
264 #include "isdn_v110.h"
265 #include "isdn_cards.h"
266
267 /* Debugflags */
268 #undef ISDN_DEBUG_STATCALLB
269
270 isdn_dev *dev = (isdn_dev *) 0;
271
272 static char *isdn_revision = "$Revision: 1.55 $";
273
274 extern char *isdn_net_revision;
275 extern char *isdn_tty_revision;
276 #ifdef CONFIG_ISDN_PPP
277 extern char *isdn_ppp_revision;
278 #else
279 static char *isdn_ppp_revision = ": none $";
280 #endif
281 #ifdef CONFIG_ISDN_AUDIO
282 extern char *isdn_audio_revision;
283 #else
284 static char *isdn_audio_revision = ": none $";
285 #endif
286 extern char *isdn_v110_revision;
287
288 static int isdn_writebuf_stub(int, int, const u_char *, int, int);
289
290 void
291 isdn_MOD_INC_USE_COUNT(void)
292 {
293 MOD_INC_USE_COUNT;
294 }
295
296 void
297 isdn_MOD_DEC_USE_COUNT(void)
298 {
299 MOD_DEC_USE_COUNT;
300 }
301
302 #if defined(ISDN_DEBUG_NET_DUMP) || defined(ISDN_DEBUG_MODEM_DUMP)
303 void
304 isdn_dumppkt(char *s, u_char * p, int len, int dumplen)
305 {
306 int dumpc;
307
308 printk(KERN_DEBUG "%s(%d) ", s, len);
309 for (dumpc = 0; (dumpc < dumplen) && (len); len--, dumpc++)
310 printk(" %02x", *p++);
311 printk("\n");
312 }
313 #endif
314
315 static void
316 isdn_free_queue(struct sk_buff_head *queue)
317 {
318 struct sk_buff *skb;
319 unsigned long flags;
320
321 save_flags(flags);
322 cli();
323 if (skb_queue_len(queue))
324 while ((skb = skb_dequeue(queue)))
325 dev_kfree_skb(skb);
326 restore_flags(flags);
327 }
328
329 int
330 isdn_dc2minor(int di, int ch)
331 {
332 int i;
333 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
334 if (dev->chanmap[i] == ch && dev->drvmap[i] == di)
335 return i;
336 return -1;
337 }
338
339 static int isdn_timer_cnt1 = 0;
340 static int isdn_timer_cnt2 = 0;
341 static int isdn_timer_cnt3 = 0;
342 static int isdn_timer_cnt4 = 0;
343
344 static void
345 isdn_timer_funct(ulong dummy)
346 {
347 int tf = dev->tflags;
348
349 if (tf & ISDN_TIMER_FAST) {
350 if (tf & ISDN_TIMER_MODEMREAD)
351 isdn_tty_readmodem();
352 if (tf & ISDN_TIMER_MODEMPLUS)
353 isdn_tty_modem_escape();
354 if (tf & ISDN_TIMER_MODEMXMIT)
355 isdn_tty_modem_xmit();
356 }
357 if (tf & ISDN_TIMER_SLOW) {
358 if (++isdn_timer_cnt1 >= ISDN_TIMER_02SEC) {
359 isdn_timer_cnt1 = 0;
360 if (tf & ISDN_TIMER_NETDIAL)
361 isdn_net_dial();
362 }
363 if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) {
364 isdn_timer_cnt2 = 0;
365 if (tf & ISDN_TIMER_NETHANGUP)
366 isdn_net_autohup();
367 if (++isdn_timer_cnt3 > ISDN_TIMER_RINGING) {
368 isdn_timer_cnt3 = 0;
369 if (tf & ISDN_TIMER_MODEMRING)
370 isdn_tty_modem_ring();
371 }
372 if (++isdn_timer_cnt4 > ISDN_TIMER_KEEPINT) {
373 isdn_timer_cnt4 = 0;
374 if (tf & ISDN_TIMER_KEEPALIVE)
375 isdn_net_slarp_out();
376 }
377 #if (defined CONFIG_ISDN_PPP) && (defined CONFIG_ISDN_MPP)
378 if (tf & ISDN_TIMER_IPPP)
379 isdn_ppp_timer_timeout();
380 #endif
381 }
382 }
383 if (tf) {
384 int flags;
385
386 save_flags(flags);
387 cli();
388 del_timer(&dev->timer);
389 dev->timer.expires = jiffies + ISDN_TIMER_RES;
390 add_timer(&dev->timer);
391 restore_flags(flags);
392 }
393 }
394
395 void
396 isdn_timer_ctrl(int tf, int onoff)
397 {
398 int flags;
399
400 save_flags(flags);
401 cli();
402 if ((tf & ISDN_TIMER_SLOW) && (!(dev->tflags & ISDN_TIMER_SLOW))) {
403 /* If the slow-timer wasn't activated until now */
404 isdn_timer_cnt1 = 0;
405 isdn_timer_cnt2 = 0;
406 }
407 if (onoff)
408 dev->tflags |= tf;
409 else
410 dev->tflags &= ~tf;
411 if (dev->tflags) {
412 if (!del_timer(&dev->timer)) /* del_timer is 1, when active */
413 dev->timer.expires = jiffies + ISDN_TIMER_RES;
414 add_timer(&dev->timer);
415 }
416 restore_flags(flags);
417 }
418
419 /*
420 * Receive a packet from B-Channel. (Called from low-level-module)
421 */
422 static void
423 isdn_receive_skb_callback(int di, int channel, struct sk_buff *skb)
424 {
425 int i;
426
427 if ((i = isdn_dc2minor(di, channel)) == -1) {
428 dev_kfree_skb(skb);
429 return;
430 }
431 /* Update statistics */
432 dev->ibytes[i] += skb->len;
433
434 /* First, try to deliver data to network-device */
435 if (isdn_net_rcv_skb(i, skb))
436 return;
437
438 /* V.110 handling
439 * makes sense for async streams only, so it is
440 * called after possible net-device delivery.
441 */
442 if (dev->v110[i]) {
443 atomic_inc(&dev->v110use[i]);
444 skb = isdn_v110_decode(dev->v110[i], skb);
445 atomic_dec(&dev->v110use[i]);
446 if (!skb)
447 return;
448 }
449
450 /* No network-device found, deliver to tty or raw-channel */
451 if (skb->len) {
452 if (isdn_tty_rcv_skb(i, di, channel, skb))
453 return;
454 wake_up_interruptible(&dev->drv[di]->rcv_waitq[channel]);
455 } else
456 dev_kfree_skb(skb);
457 }
458
459 /*
460 * Intercept command from Linklevel to Lowlevel.
461 * If layer 2 protocol is V.110 and this is not supported by current
462 * lowlevel-driver, use driver's transparent mode and handle V.110 in
463 * linklevel instead.
464 */
465 int
466 isdn_command(isdn_ctrl *cmd)
467 {
468 if (cmd->command == ISDN_CMD_SETL2) {
469 int idx = isdn_dc2minor(cmd->driver, cmd->arg & 255);
470 unsigned long l2prot = (cmd->arg >> 8) & 255;
471 unsigned long features = (dev->drv[cmd->driver]->interface->features
472 >> ISDN_FEATURE_L2_SHIFT) &
473 ISDN_FEATURE_L2_MASK;
474 unsigned long l2_feature = (1 << l2prot);
475
476 switch (l2prot) {
477 case ISDN_PROTO_L2_V11096:
478 case ISDN_PROTO_L2_V11019:
479 case ISDN_PROTO_L2_V11038:
480 /* If V.110 requested, but not supported by
481 * HL-driver, set emulator-flag and change
482 * Layer-2 to transparent
483 */
484 if (!(features & l2_feature)) {
485 dev->v110emu[idx] = l2prot;
486 cmd->arg = (cmd->arg & 255) |
487 (ISDN_PROTO_L2_TRANS << 8);
488 } else
489 dev->v110emu[idx] = 0;
490 }
491 }
492 return dev->drv[cmd->driver]->interface->command(cmd);
493 }
494
495 void
496 isdn_all_eaz(int di, int ch)
497 {
498 isdn_ctrl cmd;
499
500 if (di < 0)
501 return;
502 cmd.driver = di;
503 cmd.arg = ch;
504 cmd.command = ISDN_CMD_SETEAZ;
505 cmd.parm.num[0] = '\0';
506 isdn_command(&cmd);
507 }
508
509 static int
510 isdn_status_callback(isdn_ctrl * c)
511 {
512 int di;
513 ulong flags;
514 int i;
515 int r;
516 int retval = 0;
517 isdn_ctrl cmd;
518
519 di = c->driver;
520 i = isdn_dc2minor(di, c->arg);
521 switch (c->command) {
522 case ISDN_STAT_BSENT:
523 if (i < 0)
524 return -1;
525 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
526 return 0;
527 if (isdn_net_stat_callback(i, c))
528 return 0;
529 if (isdn_v110_stat_callback(i, c))
530 return 0;
531 if (isdn_tty_stat_callback(i, c))
532 return 0;
533 wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]);
534 break;
535 case ISDN_STAT_STAVAIL:
536 save_flags(flags);
537 cli();
538 dev->drv[di]->stavail += c->arg;
539 restore_flags(flags);
540 wake_up_interruptible(&dev->drv[di]->st_waitq);
541 break;
542 case ISDN_STAT_RUN:
543 dev->drv[di]->running = 1;
544 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
545 if (dev->drvmap[i] == di)
546 isdn_all_eaz(di, dev->chanmap[i]);
547 break;
548 case ISDN_STAT_STOP:
549 dev->drv[di]->running = 0;
550 break;
551 case ISDN_STAT_ICALL:
552 if (i < 0)
553 return -1;
554 #ifdef ISDN_DEBUG_STATCALLB
555 printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num);
556 #endif
557 if (dev->global_flags & ISDN_GLOBAL_STOPPED) {
558 cmd.driver = di;
559 cmd.arg = c->arg;
560 cmd.command = ISDN_CMD_HANGUP;
561 isdn_command(&cmd);
562 return 0;
563 }
564 /* Try to find a network-interface which will accept incoming call */
565 cmd.driver = di;
566 cmd.arg = c->arg;
567 cmd.command = ISDN_CMD_LOCK;
568 isdn_command(&cmd);
569 r = isdn_net_find_icall(di, c->arg, i, c->parm.setup);
570 switch (r) {
571 case 0:
572 /* No network-device replies.
573 * Try ttyI's
574 */
575 if (isdn_tty_find_icall(di, c->arg, c->parm.setup) >= 0)
576 retval = 1;
577 else if (dev->drv[di]->reject_bus) {
578 cmd.driver = di;
579 cmd.arg = c->arg;
580 cmd.command = ISDN_CMD_HANGUP;
581 isdn_command(&cmd);
582 retval = 2;
583 }
584 break;
585 case 1:
586 /* Schedule connection-setup */
587 isdn_net_dial();
588 cmd.driver = di;
589 cmd.arg = c->arg;
590 cmd.command = ISDN_CMD_ACCEPTD;
591 isdn_command(&cmd);
592 retval = 1;
593 break;
594 case 2: /* For calling back, first reject incoming call ... */
595 case 3: /* Interface found, but down, reject call actively */
596 retval = 2;
597 printk(KERN_INFO "isdn: Rejecting Call\n");
598 cmd.driver = di;
599 cmd.arg = c->arg;
600 cmd.command = ISDN_CMD_HANGUP;
601 isdn_command(&cmd);
602 if (r == 3)
603 break;
604 /* Fall through */
605 case 4:
606 /* ... then start callback. */
607 isdn_net_dial();
608 break;
609 }
610 if (retval != 1) {
611 cmd.driver = di;
612 cmd.arg = c->arg;
613 cmd.command = ISDN_CMD_UNLOCK;
614 isdn_command(&cmd);
615 }
616 return retval;
617 break;
618 case ISDN_STAT_CINF:
619 if (i < 0)
620 return -1;
621 #ifdef ISDN_DEBUG_STATCALLB
622 printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num);
623 #endif
624 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
625 return 0;
626 if (strcmp(c->parm.num, "0"))
627 isdn_net_stat_callback(i, c);
628 isdn_tty_stat_callback(i, c);
629 break;
630 case ISDN_STAT_CAUSE:
631 #ifdef ISDN_DEBUG_STATCALLB
632 printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num);
633 #endif
634 printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n",
635 dev->drvid[di], c->arg, c->parm.num);
636 isdn_tty_stat_callback(i, c);
637 break;
638 case ISDN_STAT_DCONN:
639 if (i < 0)
640 return -1;
641 #ifdef ISDN_DEBUG_STATCALLB
642 printk(KERN_DEBUG "DCONN: %ld\n", c->arg);
643 #endif
644 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
645 return 0;
646 /* Find any net-device, waiting for D-channel setup */
647 if (isdn_net_stat_callback(i, c))
648 break;
649 isdn_v110_stat_callback(i, c);
650 /* Find any ttyI, waiting for D-channel setup */
651 if (isdn_tty_stat_callback(i, c)) {
652 cmd.driver = di;
653 cmd.arg = c->arg;
654 cmd.command = ISDN_CMD_ACCEPTB;
655 isdn_command(&cmd);
656 break;
657 }
658 break;
659 case ISDN_STAT_DHUP:
660 if (i < 0)
661 return -1;
662 #ifdef ISDN_DEBUG_STATCALLB
663 printk(KERN_DEBUG "DHUP: %ld\n", c->arg);
664 #endif
665 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
666 return 0;
667 dev->drv[di]->flags &= ~(1 << (c->arg));
668 isdn_info_update();
669 /* Signal hangup to network-devices */
670 if (isdn_net_stat_callback(i, c))
671 break;
672 isdn_v110_stat_callback(i, c);
673 if (isdn_tty_stat_callback(i, c))
674 break;
675 break;
676 case ISDN_STAT_BCONN:
677 if (i < 0)
678 return -1;
679 #ifdef ISDN_DEBUG_STATCALLB
680 printk(KERN_DEBUG "BCONN: %ld\n", c->arg);
681 #endif
682 /* Signal B-channel-connect to network-devices */
683 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
684 return 0;
685 dev->drv[di]->flags |= (1 << (c->arg));
686 isdn_info_update();
687 if (isdn_net_stat_callback(i, c))
688 break;
689 isdn_v110_stat_callback(i, c);
690 if (isdn_tty_stat_callback(i, c))
691 break;
692 break;
693 case ISDN_STAT_BHUP:
694 if (i < 0)
695 return -1;
696 #ifdef ISDN_DEBUG_STATCALLB
697 printk(KERN_DEBUG "BHUP: %ld\n", c->arg);
698 #endif
699 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
700 return 0;
701 dev->drv[di]->flags &= ~(1 << (c->arg));
702 isdn_info_update();
703 #ifdef CONFIG_ISDN_X25
704 /* Signal hangup to network-devices */
705 if (isdn_net_stat_callback(i, c))
706 break;
707 #endif
708 isdn_v110_stat_callback(i, c);
709 if (isdn_tty_stat_callback(i, c))
710 break;
711 break;
712 case ISDN_STAT_NODCH:
713 if (i < 0)
714 return -1;
715 #ifdef ISDN_DEBUG_STATCALLB
716 printk(KERN_DEBUG "NODCH: %ld\n", c->arg);
717 #endif
718 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
719 return 0;
720 if (isdn_net_stat_callback(i, c))
721 break;
722 if (isdn_tty_stat_callback(i, c))
723 break;
724 break;
725 case ISDN_STAT_ADDCH:
726 break;
727 case ISDN_STAT_UNLOAD:
728 save_flags(flags);
729 cli();
730 isdn_tty_stat_callback(i, c);
731 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
732 if (dev->drvmap[i] == di) {
733 dev->drvmap[i] = -1;
734 dev->chanmap[i] = -1;
735 }
736 dev->drivers--;
737 dev->channels -= dev->drv[di]->channels;
738 kfree(dev->drv[di]->rcverr);
739 kfree(dev->drv[di]->rcvcount);
740 for (i = 0; i < dev->drv[di]->channels; i++)
741 isdn_free_queue(&dev->drv[di]->rpqueue[i]);
742 kfree(dev->drv[di]->rpqueue);
743 kfree(dev->drv[di]->rcv_waitq);
744 kfree(dev->drv[di]->snd_waitq);
745 kfree(dev->drv[di]);
746 dev->drv[di] = NULL;
747 dev->drvid[di][0] = '\0';
748 isdn_info_update();
749 restore_flags(flags);
750 return 0;
751 case ISDN_STAT_L1ERR:
752 break;
753 default:
754 return -1;
755 }
756 return 0;
757 }
758
759 /*
760 * Get integer from char-pointer, set pointer to end of number
761 */
762 int
763 isdn_getnum(char **p)
764 {
765 int v = -1;
766
767 while (*p[0] >= '0' && *p[0] <= '9')
768 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0');
769 return v;
770 }
771
772 #define DLE 0x10
773
774 /*
775 * isdn_readbchan() tries to get data from the read-queue.
776 * It MUST be called with interrupts off.
777 *
778 * Be aware that this is not an atomic operation when sleep != 0, even though
779 * interrupts are turned off! Well, like that we are currently only called
780 * on behalf of a read system call on raw device files (which are documented
781 * to be dangerous and for for debugging purpose only). The inode semaphore
782 * takes care that this is not called for the same minor device number while
783 * we are sleeping, but access is not serialized against simultaneous read()
784 * from the corresponding ttyI device. Can other ugly events, like changes
785 * of the mapping (di,ch)<->minor, happen during the sleep? --he
786 */
787 int
788 isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, struct wait_queue **sleep)
789 {
790 int left;
791 int count;
792 int count_pull;
793 int count_put;
794 int dflag;
795 struct sk_buff *skb;
796 u_char *cp;
797
798 if (!dev->drv[di])
799 return 0;
800 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) {
801 if (sleep)
802 interruptible_sleep_on(sleep);
803 else
804 return 0;
805 }
806 left = MIN(len, dev->drv[di]->rcvcount[channel]);
807 cp = buf;
808 count = 0;
809 while (left) {
810 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
811 break;
812 #ifdef CONFIG_ISDN_AUDIO
813 if (ISDN_AUDIO_SKB_LOCK(skb))
814 break;
815 ISDN_AUDIO_SKB_LOCK(skb) = 1;
816 if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
817 char *p = skb->data;
818 unsigned long DLEmask = (1 << channel);
819
820 dflag = 0;
821 count_pull = count_put = 0;
822 while ((count_pull < skb->len) && (left-- > 0)) {
823 if (dev->drv[di]->DLEflag & DLEmask) {
824 *cp++ = DLE;
825 dev->drv[di]->DLEflag &= ~DLEmask;
826 } else {
827 *cp++ = *p;
828 if (*p == DLE) {
829 dev->drv[di]->DLEflag |= DLEmask;
830 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
831 }
832 p++;
833 count_pull++;
834 }
835 count_put++;
836 }
837 if (count_pull >= skb->len)
838 dflag = 1;
839 } else {
840 #endif
841 /* No DLE's in buff, so simply copy it */
842 dflag = 1;
843 if ((count_pull = skb->len) > left) {
844 count_pull = left;
845 dflag = 0;
846 }
847 count_put = count_pull;
848 memcpy(cp, skb->data, count_put);
849 cp += count_put;
850 left -= count_put;
851 #ifdef CONFIG_ISDN_AUDIO
852 }
853 #endif
854 count += count_put;
855 if (fp) {
856 memset(fp, 0, count_put);
857 fp += count_put;
858 }
859 if (dflag) {
860 /* We got all the data in this buff.
861 * Now we can dequeue it.
862 */
863 if (fp)
864 *(fp - 1) = 0xff;
865 #ifdef CONFIG_ISDN_AUDIO
866 ISDN_AUDIO_SKB_LOCK(skb) = 0;
867 #endif
868 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
869 dev_kfree_skb(skb);
870 } else {
871 /* Not yet emptied this buff, so it
872 * must stay in the queue, for further calls
873 * but we pull off the data we got until now.
874 */
875 skb_pull(skb, count_pull);
876 #ifdef CONFIG_ISDN_AUDIO
877 ISDN_AUDIO_SKB_LOCK(skb) = 0;
878 #endif
879 }
880 dev->drv[di]->rcvcount[channel] -= count_put;
881 }
882 return count;
883 }
884
885 static __inline int
886 isdn_minor2drv(int minor)
887 {
888 return (dev->drvmap[minor]);
889 }
890
891 static __inline int
892 isdn_minor2chan(int minor)
893 {
894 return (dev->chanmap[minor]);
895 }
896
897 #define INF_DV 0x01 /* Data version for /dev/isdninfo */
898
899 static char *
900 isdn_statstr(void)
901 {
902 static char istatbuf[2048];
903 char *p;
904 int i;
905
906 sprintf(istatbuf, "idmap:\t");
907 p = istatbuf + strlen(istatbuf);
908 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
909 sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]);
910 p = istatbuf + strlen(istatbuf);
911 }
912 sprintf(p, "\nchmap:\t");
913 p = istatbuf + strlen(istatbuf);
914 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
915 sprintf(p, "%d ", dev->chanmap[i]);
916 p = istatbuf + strlen(istatbuf);
917 }
918 sprintf(p, "\ndrmap:\t");
919 p = istatbuf + strlen(istatbuf);
920 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
921 sprintf(p, "%d ", dev->drvmap[i]);
922 p = istatbuf + strlen(istatbuf);
923 }
924 sprintf(p, "\nusage:\t");
925 p = istatbuf + strlen(istatbuf);
926 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
927 sprintf(p, "%d ", dev->usage[i]);
928 p = istatbuf + strlen(istatbuf);
929 }
930 sprintf(p, "\nflags:\t");
931 p = istatbuf + strlen(istatbuf);
932 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
933 if (dev->drv[i]) {
934 sprintf(p, "%ld ", dev->drv[i]->flags);
935 p = istatbuf + strlen(istatbuf);
936 } else {
937 sprintf(p, "? ");
938 p = istatbuf + strlen(istatbuf);
939 }
940 }
941 sprintf(p, "\nphone:\t");
942 p = istatbuf + strlen(istatbuf);
943 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
944 sprintf(p, "%s ", dev->num[i]);
945 p = istatbuf + strlen(istatbuf);
946 }
947 sprintf(p, "\n");
948 return istatbuf;
949 }
950
951 /* Module interface-code */
952
953 void
954 isdn_info_update(void)
955 {
956 infostruct *p = dev->infochain;
957
958 while (p) {
959 *(p->private) = 1;
960 p = (infostruct *) p->next;
961 }
962 wake_up_interruptible(&(dev->info_waitq));
963 }
964
965 static ssize_t
966 isdn_read(struct file *file, char *buf, size_t count, loff_t * off)
967 {
968 uint minor = MINOR(file->f_dentry->d_inode->i_rdev);
969 int len = 0;
970 ulong flags;
971 int drvidx;
972 int chidx;
973 char *p;
974
975 if (off != &file->f_pos)
976 return -ESPIPE;
977
978 if (minor == ISDN_MINOR_STATUS) {
979 if (!file->private_data) {
980 if (file->f_flags & O_NONBLOCK)
981 return -EAGAIN;
982 interruptible_sleep_on(&(dev->info_waitq));
983 }
984 p = isdn_statstr();
985 file->private_data = 0;
986 if ((len = strlen(p)) <= count) {
987 if (copy_to_user(buf, p, len))
988 return -EFAULT;
989 *off += len;
990 return len;
991 }
992 return 0;
993 }
994 if (!dev->drivers)
995 return -ENODEV;
996 if (minor < ISDN_MINOR_CTRL) {
997 drvidx = isdn_minor2drv(minor);
998 if (drvidx < 0)
999 return -ENODEV;
1000 if (!dev->drv[drvidx]->running)
1001 return -ENODEV;
1002 chidx = isdn_minor2chan(minor);
1003 if( ! (p = kmalloc(count,GFP_KERNEL)) ) return -ENOMEM;
1004 save_flags(flags);
1005 cli();
1006 len = isdn_readbchan(drvidx, chidx, p, 0, count,
1007 &dev->drv[drvidx]->rcv_waitq[chidx]);
1008 *off += len;
1009 restore_flags(flags);
1010 if( copy_to_user(buf,p,len) ) len = -EFAULT;
1011 kfree(p);
1012 return len;
1013 }
1014 if (minor <= ISDN_MINOR_CTRLMAX) {
1015 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1016 if (drvidx < 0)
1017 return -ENODEV;
1018 if (!dev->drv[drvidx]->stavail) {
1019 if (file->f_flags & O_NONBLOCK)
1020 return -EAGAIN;
1021 interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq));
1022 }
1023 if (dev->drv[drvidx]->interface->readstat)
1024 len = dev->drv[drvidx]->interface->
1025 readstat(buf, MIN(count, dev->drv[drvidx]->stavail),
1026 1, drvidx, isdn_minor2chan(minor));
1027 else
1028 len = 0;
1029 save_flags(flags);
1030 cli();
1031 if (len)
1032 dev->drv[drvidx]->stavail -= len;
1033 else
1034 dev->drv[drvidx]->stavail = 0;
1035 restore_flags(flags);
1036 *off += len;
1037 return len;
1038 }
1039 #ifdef CONFIG_ISDN_PPP
1040 if (minor <= ISDN_MINOR_PPPMAX)
1041 return (isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count));
1042 #endif
1043 return -ENODEV;
1044 }
1045
1046 static loff_t
1047 isdn_lseek(struct file *file, loff_t offset, int orig)
1048 {
1049 return -ESPIPE;
1050 }
1051
1052 static ssize_t
1053 isdn_write(struct file *file, const char *buf, size_t count, loff_t * off)
1054 {
1055 uint minor = MINOR(file->f_dentry->d_inode->i_rdev);
1056 int drvidx;
1057 int chidx;
1058
1059 if (off != &file->f_pos)
1060 return -ESPIPE;
1061
1062 if (minor == ISDN_MINOR_STATUS)
1063 return -EPERM;
1064 if (!dev->drivers)
1065 return -ENODEV;
1066 if (minor < ISDN_MINOR_CTRL) {
1067 drvidx = isdn_minor2drv(minor);
1068 if (drvidx < 0)
1069 return -ENODEV;
1070 if (!dev->drv[drvidx]->running)
1071 return -ENODEV;
1072 chidx = isdn_minor2chan(minor);
1073 while (isdn_writebuf_stub(drvidx, chidx, buf, count, 1) != count)
1074 interruptible_sleep_on(&dev->drv[drvidx]->snd_waitq[chidx]);
1075 return count;
1076 }
1077 if (minor <= ISDN_MINOR_CTRLMAX) {
1078 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1079 if (drvidx < 0)
1080 return -ENODEV;
1081 /*
1082 * We want to use the isdnctrl device to load the firmware
1083 *
1084 if (!dev->drv[drvidx]->running)
1085 return -ENODEV;
1086 */
1087 if (dev->drv[drvidx]->interface->writecmd)
1088 return (dev->drv[drvidx]->interface->
1089 writecmd(buf, count, 1, drvidx, isdn_minor2chan(minor)));
1090 else
1091 return count;
1092 }
1093 #ifdef CONFIG_ISDN_PPP
1094 if (minor <= ISDN_MINOR_PPPMAX)
1095 return (isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count));
1096 #endif
1097 return -ENODEV;
1098 }
1099
1100 static unsigned int
1101 isdn_poll(struct file *file, poll_table * wait)
1102 {
1103 unsigned int mask = 0;
1104 unsigned int minor = MINOR(file->f_dentry->d_inode->i_rdev);
1105 int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1106
1107 if (minor == ISDN_MINOR_STATUS) {
1108 poll_wait(file, &(dev->info_waitq), wait);
1109 /* mask = POLLOUT | POLLWRNORM; */
1110 if (file->private_data) {
1111 mask |= POLLIN | POLLRDNORM;
1112 }
1113 return mask;
1114 }
1115 if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
1116 poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
1117 if (drvidx < 0) {
1118 printk(KERN_ERR "isdn_common: isdn_poll 1 -> what the hell\n");
1119 return POLLERR;
1120 }
1121 mask = POLLOUT | POLLWRNORM;
1122 if (dev->drv[drvidx]->stavail) {
1123 mask |= POLLIN | POLLRDNORM;
1124 }
1125 return mask;
1126 }
1127 #ifdef CONFIG_ISDN_PPP
1128 if (minor <= ISDN_MINOR_PPPMAX)
1129 return (isdn_ppp_poll(file, wait));
1130 #endif
1131 printk(KERN_ERR "isdn_common: isdn_poll 2 -> what the hell\n");
1132 return POLLERR;
1133 }
1134
1135 /*
1136 * This accesses user space with interrupts off, but is not needed by
1137 * any of the isdn4k-util programs anyway. Thus, in contrast to your
1138 * first impression after looking at the code, fixing is trival!*/
1139 #if 0
1140 static int
1141 isdn_set_allcfg(char *src)
1142 {
1143 int ret;
1144 int i;
1145 ulong flags;
1146 isdn_net_ioctl_cfg cfg;
1147 isdn_net_ioctl_phone phone;
1148
1149 if ((ret = isdn_net_rmall()))
1150 return ret;
1151 if (copy_from_user((char *) &i, src, sizeof(int))) return -EFAULT;
1152 save_flags(flags);
1153 cli();
1154 src += sizeof(int);
1155 while (i) {
1156 int phone_len;
1157 int out_flag;
1158
1159 if (copy_from_user((char *) &cfg, src, sizeof(cfg))) {
1160 restore_flags(flags);
1161 return -EFAULT;
1162 }
1163 src += sizeof(cfg);
1164 if (!isdn_net_new(cfg.name, NULL)) {
1165 restore_flags(flags);
1166 return -EIO;
1167 }
1168 if ((ret = isdn_net_setcfg(&cfg))) {
1169 restore_flags(flags);
1170 return ret;
1171 }
1172 phone_len = out_flag = 0;
1173 while (out_flag < 2) {
1174 if ((ret = verify_area(VERIFY_READ, src, 1))) {
1175 restore_flags(flags);
1176 return ret;
1177 }
1178 get_user(phone.phone[phone_len], src++);
1179 if ((phone.phone[phone_len] == ' ') ||
1180 (phone.phone[phone_len] == '\0')) {
1181 if (phone_len) {
1182 phone.phone[phone_len] = '\0';
1183 strcpy(phone.name, cfg.name);
1184 phone.outgoing = out_flag;
1185 if ((ret = isdn_net_addphone(&phone))) {
1186 restore_flags(flags);
1187 return ret;
1188 }
1189 } else
1190 out_flag++;
1191 phone_len = 0;
1192 }
1193 if (++phone_len >= sizeof(phone.phone))
1194 printk(KERN_WARNING
1195 "%s: IIOCSETSET phone number too long, ignored\n",
1196 cfg.name);
1197 }
1198 i--;
1199 }
1200 restore_flags(flags);
1201 return 0;
1202 }
1203
1204 static int
1205 isdn_get_allcfg(char *dest)
1206 {
1207 isdn_net_ioctl_cfg cfg;
1208 isdn_net_ioctl_phone phone;
1209 isdn_net_dev *p;
1210 ulong flags;
1211 int ret;
1212
1213 /* Walk through netdev-chain */
1214 save_flags(flags);
1215 cli();
1216 p = dev->netdev;
1217 while (p) {
1218 isdn_net_local *lp = p->local;
1219
1220 if ((ret = verify_area(VERIFY_WRITE, (void *) dest, sizeof(cfg) + 200))) {
1221 restore_flags(flags);
1222 return ret;
1223 }
1224 strcpy(cfg.eaz, lp->msn);
1225 cfg.exclusive = lp->exclusive;
1226 if (lp->pre_device >= 0) {
1227 sprintf(cfg.drvid, "%s,%d", dev->drvid[lp->pre_device],
1228 lp->pre_channel);
1229 } else
1230 cfg.drvid[0] = '\0';
1231 cfg.onhtime = lp->onhtime;
1232 cfg.charge = lp->charge;
1233 cfg.l2_proto = lp->l2_proto;
1234 cfg.l3_proto = lp->l3_proto;
1235 cfg.p_encap = lp->p_encap;
1236 cfg.secure = (lp->flags & ISDN_NET_SECURE) ? 1 : 0;
1237 cfg.callback = (lp->flags & ISDN_NET_CALLBACK) ? 1 : 0;
1238 cfg.chargehup = (lp->hupflags & ISDN_CHARGEHUP) ? 1 : 0;
1239 cfg.ihup = (lp->hupflags & ISDN_INHUP) ? 1 : 0;
1240 cfg.chargeint = lp->chargeint;
1241 if (copy_to_user(dest, lp->name, 10)) {
1242 restore_flags(flags);
1243 return -EFAULT;
1244 }
1245 dest += 10;
1246 if (copy_to_user(dest, (char *) &cfg, sizeof(cfg))) {
1247 restore_flags(flags);
1248 return -EFAULT;
1249 }
1250 dest += sizeof(cfg);
1251 strcpy(phone.name, lp->name);
1252 phone.outgoing = 0;
1253 if ((ret = isdn_net_getphones(&phone, dest)) < 0) {
1254 restore_flags(flags);
1255 return ret;
1256 } else
1257 dest += ret;
1258 strcpy(phone.name, lp->name);
1259 phone.outgoing = 1;
1260 if ((ret = isdn_net_getphones(&phone, dest)) < 0) {
1261 restore_flags(flags);
1262 return ret;
1263 } else
1264 dest += ret;
1265 put_user(0, dest);
1266 p = p->next;
1267 }
1268 restore_flags(flags);
1269 return 0;
1270 }
1271 #endif
1272
1273 static int
1274 isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
1275 {
1276 uint minor = MINOR(inode->i_rdev);
1277 isdn_ctrl c;
1278 int drvidx;
1279 int chidx;
1280 int ret;
1281 int i;
1282 char *p;
1283 char *s;
1284 union iocpar {
1285 char name[10];
1286 char bname[22];
1287 isdn_ioctl_struct iocts;
1288 isdn_net_ioctl_phone phone;
1289 isdn_net_ioctl_cfg cfg;
1290 } iocpar;
1291
1292 #define name iocpar.name
1293 #define bname iocpar.bname
1294 #define iocts iocpar.iocts
1295 #define phone iocpar.phone
1296 #define cfg iocpar.cfg
1297
1298 if (minor == ISDN_MINOR_STATUS) {
1299 switch (cmd) {
1300 case IIOCGETDVR:
1301 return (TTY_DV +
1302 (NET_DV << 8) +
1303 (INF_DV << 16));
1304 case IIOCGETCPS:
1305 if (arg) {
1306 ulong *p = (ulong *) arg;
1307 int i;
1308 if ((ret = verify_area(VERIFY_WRITE, (void *) arg,
1309 sizeof(ulong) * ISDN_MAX_CHANNELS * 2)))
1310 return ret;
1311 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1312 put_user(dev->ibytes[i], p++);
1313 put_user(dev->obytes[i], p++);
1314 }
1315 return 0;
1316 } else
1317 return -EINVAL;
1318 break;
1319 default:
1320 return -EINVAL;
1321 }
1322 }
1323 if (!dev->drivers)
1324 return -ENODEV;
1325 if (minor < ISDN_MINOR_CTRL) {
1326 drvidx = isdn_minor2drv(minor);
1327 if (drvidx < 0)
1328 return -ENODEV;
1329 chidx = isdn_minor2chan(minor);
1330 if (!dev->drv[drvidx]->running)
1331 return -ENODEV;
1332 return 0;
1333 }
1334 if (minor <= ISDN_MINOR_CTRLMAX) {
1335 /*
1336 * isdn net devices manage lots of configuration variables as linked lists.
1337 * Those lists must only be manipulated from user space. Some of the ioctl's
1338 * service routines access user space and are not atomic. Therefor, ioctl's
1339 * manipulating the lists and ioctl's sleeping while accessing the lists
1340 * are serialized by means of a semaphore.
1341 */
1342 switch (cmd) {
1343 #ifdef CONFIG_NETDEVICES
1344 case IIOCNETAIF:
1345 /* Add a network-interface */
1346 if (arg) {
1347 if (copy_from_user(name, (char *) arg, sizeof(name)))
1348 return -EFAULT;
1349 s = name;
1350 } else {
1351 s = NULL;
1352 }
1353 ret = down_interruptible(&dev->sem);
1354 if( ret ) return ret;
1355 if ((s = isdn_net_new(s, NULL))) {
1356 if (copy_to_user((char *) arg, s, strlen(s) + 1)){
1357 ret = -EFAULT;
1358 } else {
1359 ret = 0;
1360 }
1361 } else
1362 ret = -ENODEV;
1363 up(&dev->sem);
1364 return ret;
1365 case IIOCNETASL:
1366 /* Add a slave to a network-interface */
1367 if (arg) {
1368 if (copy_from_user(bname, (char *) arg, sizeof(bname) - 1))
1369 return -EFAULT;
1370 } else
1371 return -EINVAL;
1372 ret = down_interruptible(&dev->sem);
1373 if( ret ) return ret;
1374 if ((s = isdn_net_newslave(bname))) {
1375 if (copy_to_user((char *) arg, s, strlen(s) + 1)){
1376 ret = -EFAULT;
1377 } else {
1378 ret = 0;
1379 }
1380 } else
1381 ret = -ENODEV;
1382 up(&dev->sem);
1383 return ret;
1384 case IIOCNETDIF:
1385 /* Delete a network-interface */
1386 if (arg) {
1387 if (copy_from_user(name, (char *) arg, sizeof(name)))
1388 return -EFAULT;
1389 ret = down_interruptible(&dev->sem);
1390 if( ret ) return ret;
1391 ret = isdn_net_rm(name);
1392 up(&dev->sem);
1393 return ret;
1394 } else
1395 return -EINVAL;
1396 case IIOCNETSCF:
1397 /* Set configurable parameters of a network-interface */
1398 if (arg) {
1399 if (copy_from_user((char *) &cfg, (char *) arg, sizeof(cfg)))
1400 return -EFAULT;
1401 return isdn_net_setcfg(&cfg);
1402 } else
1403 return -EINVAL;
1404 case IIOCNETGCF:
1405 /* Get configurable parameters of a network-interface */
1406 if (arg) {
1407 if (copy_from_user((char *) &cfg, (char *) arg, sizeof(cfg)))
1408 return -EFAULT;
1409 if (!(ret = isdn_net_getcfg(&cfg))) {
1410 if (copy_to_user((char *) arg, (char *) &cfg, sizeof(cfg)))
1411 return -EFAULT;
1412 }
1413 return ret;
1414 } else
1415 return -EINVAL;
1416 case IIOCNETANM:
1417 /* Add a phone-number to a network-interface */
1418 if (arg) {
1419 if (copy_from_user((char *) &phone, (char *) arg, sizeof(phone)))
1420 return -EFAULT;
1421 ret = down_interruptible(&dev->sem);
1422 if( ret ) return ret;
1423 ret = isdn_net_addphone(&phone);
1424 up(&dev->sem);
1425 return ret;
1426 } else
1427 return -EINVAL;
1428 case IIOCNETGNM:
1429 /* Get list of phone-numbers of a network-interface */
1430 if (arg) {
1431 if (copy_from_user((char *) &phone, (char *) arg, sizeof(phone)))
1432 return -EFAULT;
1433 ret = down_interruptible(&dev->sem);
1434 if( ret ) return ret;
1435 ret = isdn_net_getphones(&phone, (char *) arg);
1436 up(&dev->sem);
1437 return ret;
1438 } else
1439 return -EINVAL;
1440 case IIOCNETDNM:
1441 /* Delete a phone-number of a network-interface */
1442 if (arg) {
1443 if (copy_from_user((char *) &phone, (char *) arg, sizeof(phone)))
1444 return -EFAULT;
1445 ret = down_interruptible(&dev->sem);
1446 if( ret ) return ret;
1447 ret = isdn_net_delphone(&phone);
1448 up(&dev->sem);
1449 return ret;
1450 } else
1451 return -EINVAL;
1452 case IIOCNETDIL:
1453 /* Force dialing of a network-interface */
1454 if (arg) {
1455 if (copy_from_user(name, (char *) arg, sizeof(name)))
1456 return -EFAULT;
1457 return isdn_net_force_dial(name);
1458 } else
1459 return -EINVAL;
1460 #ifdef CONFIG_ISDN_PPP
1461 case IIOCNETALN:
1462 if (!arg)
1463 return -EINVAL;
1464 if (copy_from_user(name, (char *) arg, sizeof(name)))
1465 return -EFAULT;
1466 return isdn_ppp_dial_slave(name);
1467 case IIOCNETDLN:
1468 if (!arg)
1469 return -EINVAL;
1470 if (copy_from_user(name, (char *) arg, sizeof(name)))
1471 return -EFAULT;
1472 return isdn_ppp_hangup_slave(name);
1473 #endif
1474 case IIOCNETHUP:
1475 /* Force hangup of a network-interface */
1476 if (!arg)
1477 return -EINVAL;
1478 if (copy_from_user(name, (char *) arg, sizeof(name)))
1479 return -EFAULT;
1480 return isdn_net_force_hangup(name);
1481 break;
1482 #endif /* CONFIG_NETDEVICES */
1483 case IIOCSETVER:
1484 dev->net_verbose = arg;
1485 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1486 return 0;
1487 case IIOCSETGST:
1488 if (arg)
1489 dev->global_flags |= ISDN_GLOBAL_STOPPED;
1490 else
1491 dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1492 printk(KERN_INFO "isdn: Global Mode %s\n",
1493 (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1494 return 0;
1495 case IIOCSETBRJ:
1496 drvidx = -1;
1497 if (arg) {
1498 int i;
1499 char *p;
1500 if (copy_from_user((char *) &iocts, (char *) arg,
1501 sizeof(isdn_ioctl_struct)))
1502 return -EFAULT;
1503 if (strlen(iocts.drvid)) {
1504 if ((p = strchr(iocts.drvid, ',')))
1505 *p = 0;
1506 drvidx = -1;
1507 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1508 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1509 drvidx = i;
1510 break;
1511 }
1512 }
1513 }
1514 if (drvidx == -1)
1515 return -ENODEV;
1516 dev->drv[drvidx]->reject_bus = iocts.arg;
1517 return 0;
1518 #if 0
1519 case IIOCGETSET:
1520 /* Get complete setup (all network-interfaces and profile-
1521 settings of all tty-devices */
1522 if (arg)
1523 return (isdn_get_allcfg((char *) arg));
1524 else
1525 return -EINVAL;
1526 break;
1527 case IIOCSETSET:
1528 /* Set complete setup (all network-interfaces and profile-
1529 settings of all tty-devices */
1530 if (arg)
1531 return (isdn_set_allcfg((char *) arg));
1532 else
1533 return -EINVAL;
1534 break;
1535 #endif
1536 case IIOCSIGPRF:
1537 dev->profd = current;
1538 return 0;
1539 break;
1540 case IIOCGETPRF:
1541 /* Get all Modem-Profiles */
1542 if (arg) {
1543 char *p = (char *) arg;
1544 int i;
1545
1546 if ((ret = verify_area(VERIFY_WRITE, (void *) arg,
1547 (ISDN_MODEM_ANZREG + ISDN_MSNLEN)
1548 * ISDN_MAX_CHANNELS)))
1549 return ret;
1550
1551 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1552 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1553 ISDN_MODEM_ANZREG))
1554 return -EFAULT;
1555 p += ISDN_MODEM_ANZREG;
1556 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1557 return -EFAULT;
1558 p += ISDN_MSNLEN;
1559 }
1560 return (ISDN_MODEM_ANZREG + ISDN_MSNLEN) * ISDN_MAX_CHANNELS;
1561 } else
1562 return -EINVAL;
1563 break;
1564 case IIOCSETPRF:
1565 /* Set all Modem-Profiles */
1566 if (arg) {
1567 char *p = (char *) arg;
1568 int i;
1569
1570 if ((ret = verify_area(VERIFY_READ, (void *) arg,
1571 (ISDN_MODEM_ANZREG + ISDN_MSNLEN)
1572 * ISDN_MAX_CHANNELS)))
1573 return ret;
1574
1575 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1576 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1577 ISDN_MODEM_ANZREG))
1578 return -EFAULT;
1579 p += ISDN_MODEM_ANZREG;
1580 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1581 return -EFAULT;
1582 p += ISDN_MSNLEN;
1583 }
1584 return 0;
1585 } else
1586 return -EINVAL;
1587 break;
1588 case IIOCSETMAP:
1589 case IIOCGETMAP:
1590 /* Set/Get MSN->EAZ-Mapping for a driver */
1591 if (arg) {
1592
1593 if (copy_from_user((char *) &iocts,
1594 (char *) arg,
1595 sizeof(isdn_ioctl_struct)))
1596 return -EFAULT;
1597 if (strlen(iocts.drvid)) {
1598 drvidx = -1;
1599 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1600 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1601 drvidx = i;
1602 break;
1603 }
1604 } else
1605 drvidx = 0;
1606 if (drvidx == -1)
1607 return -ENODEV;
1608 if (cmd == IIOCSETMAP) {
1609 int loop = 1;
1610
1611 p = (char *) iocts.arg;
1612 i = 0;
1613 while (loop) {
1614 int j = 0;
1615
1616 while (1) {
1617 if ((ret = verify_area(VERIFY_READ, p, 1)))
1618 return ret;
1619 get_user(bname[j], p++);
1620 switch (bname[j]) {
1621 case '\0':
1622 loop = 0;
1623 /* Fall through */
1624 case ',':
1625 bname[j] = '\0';
1626 strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
1627 j = ISDN_MSNLEN;
1628 break;
1629 default:
1630 j++;
1631 }
1632 if (j >= ISDN_MSNLEN)
1633 break;
1634 }
1635 if (++i > 9)
1636 break;
1637 }
1638 } else {
1639 p = (char *) iocts.arg;
1640 for (i = 0; i < 10; i++) {
1641 sprintf(bname, "%s%s",
1642 strlen(dev->drv[drvidx]->msn2eaz[i]) ?
1643 dev->drv[drvidx]->msn2eaz[i] : "-",
1644 (i < 9) ? "," : "\0");
1645 if (copy_to_user(p, bname, strlen(bname) + 1))
1646 return -EFAULT;
1647 p += strlen(bname);
1648 }
1649 }
1650 return 0;
1651 } else
1652 return -EINVAL;
1653 case IIOCDBGVAR:
1654 if (arg) {
1655 if (copy_to_user((char *) arg, (char *) &dev, sizeof(ulong)))
1656 return -EFAULT;
1657 return 0;
1658 } else
1659 return -EINVAL;
1660 break;
1661 default:
1662 if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
1663 cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
1664 else
1665 return -EINVAL;
1666 if (arg) {
1667 int i;
1668 char *p;
1669 if (copy_from_user((char *) &iocts, (char *) arg, sizeof(isdn_ioctl_struct)))
1670 return -EFAULT;
1671 if (strlen(iocts.drvid)) {
1672 if ((p = strchr(iocts.drvid, ',')))
1673 *p = 0;
1674 drvidx = -1;
1675 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1676 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1677 drvidx = i;
1678 break;
1679 }
1680 } else
1681 drvidx = 0;
1682 if (drvidx == -1)
1683 return -ENODEV;
1684 if ((ret = verify_area(VERIFY_WRITE, (void *) arg,
1685 sizeof(isdn_ioctl_struct))))
1686 return ret;
1687 c.driver = drvidx;
1688 c.command = ISDN_CMD_IOCTL;
1689 c.arg = cmd;
1690 memcpy(c.parm.num, (char *) &iocts.arg, sizeof(ulong));
1691 ret = isdn_command(&c);
1692 memcpy((char *) &iocts.arg, c.parm.num, sizeof(ulong));
1693 if (copy_to_user((char *) arg, &iocts, sizeof(isdn_ioctl_struct)))
1694 return -EFAULT;
1695 return ret;
1696 } else
1697 return -EINVAL;
1698 }
1699 }
1700 #ifdef CONFIG_ISDN_PPP
1701 if (minor <= ISDN_MINOR_PPPMAX)
1702 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1703 #endif
1704 return -ENODEV;
1705
1706 #undef name
1707 #undef bname
1708 #undef iocts
1709 #undef phone
1710 #undef cfg
1711 }
1712
1713 /*
1714 * Open the device code.
1715 * MOD_INC_USE_COUNT make sure that the driver memory is not freed
1716 * while the device is in use.
1717 */
1718 static int
1719 isdn_open(struct inode *ino, struct file *filep)
1720 {
1721 uint minor = MINOR(ino->i_rdev);
1722 int drvidx;
1723 int chidx;
1724 isdn_ctrl c;
1725
1726 if (minor == ISDN_MINOR_STATUS) {
1727 infostruct *p;
1728
1729 if ((p = (infostruct *) kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1730 MOD_INC_USE_COUNT;
1731 p->next = (char *) dev->infochain;
1732 p->private = (char *) &(filep->private_data);
1733 dev->infochain = p;
1734 /* At opening we allow a single update */
1735 filep->private_data = (char *) 1;
1736 return 0;
1737 } else
1738 return -ENOMEM;
1739 }
1740 if (!dev->channels)
1741 return -ENODEV;
1742 if (minor < ISDN_MINOR_CTRL) {
1743 drvidx = isdn_minor2drv(minor);
1744 if (drvidx < 0)
1745 return -ENODEV;
1746 chidx = isdn_minor2chan(minor);
1747 if (!dev->drv[drvidx]->running)
1748 return -ENODEV;
1749 if (!(dev->drv[drvidx]->flags & (1 << chidx)))
1750 return -ENODEV;
1751 c.command = ISDN_CMD_LOCK;
1752 c.driver = drvidx;
1753 isdn_command(&c);
1754 MOD_INC_USE_COUNT;
1755 return 0;
1756 }
1757 if (minor <= ISDN_MINOR_CTRLMAX) {
1758 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1759 if (drvidx < 0)
1760 return -ENODEV;
1761 c.command = ISDN_CMD_LOCK;
1762 c.driver = drvidx;
1763 MOD_INC_USE_COUNT;
1764 isdn_command(&c);
1765 return 0;
1766 }
1767 #ifdef CONFIG_ISDN_PPP
1768 if (minor <= ISDN_MINOR_PPPMAX) {
1769 int ret;
1770 if (!(ret = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep)))
1771 MOD_INC_USE_COUNT;
1772 return ret;
1773 }
1774 #endif
1775 return -ENODEV;
1776 }
1777
1778 static int
1779 isdn_close(struct inode *ino, struct file *filep)
1780 {
1781 uint minor = MINOR(ino->i_rdev);
1782 int drvidx;
1783 isdn_ctrl c;
1784
1785 MOD_DEC_USE_COUNT;
1786 if (minor == ISDN_MINOR_STATUS) {
1787 infostruct *p = dev->infochain;
1788 infostruct *q = NULL;
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 return 0;
1797 }
1798 q = p;
1799 p = (infostruct *) (p->next);
1800 }
1801 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1802 return 0;
1803 }
1804 if (minor < ISDN_MINOR_CTRL) {
1805 drvidx = isdn_minor2drv(minor);
1806 if (drvidx < 0)
1807 return 0;
1808 c.command = ISDN_CMD_UNLOCK;
1809 c.driver = drvidx;
1810 isdn_command(&c);
1811 return 0;
1812 }
1813 if (minor <= ISDN_MINOR_CTRLMAX) {
1814 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1815 if (drvidx < 0)
1816 return 0;
1817 if (dev->profd == current)
1818 dev->profd = NULL;
1819 c.command = ISDN_CMD_UNLOCK;
1820 c.driver = drvidx;
1821 isdn_command(&c);
1822 return 0;
1823 }
1824 #ifdef CONFIG_ISDN_PPP
1825 if (minor <= ISDN_MINOR_PPPMAX)
1826 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1827 #endif
1828 return 0;
1829 }
1830
1831 static struct file_operations isdn_fops =
1832 {
1833 isdn_lseek,
1834 isdn_read,
1835 isdn_write,
1836 NULL, /* isdn_readdir */
1837 isdn_poll, /* isdn_poll */
1838 isdn_ioctl, /* isdn_ioctl */
1839 NULL, /* isdn_mmap */
1840 isdn_open,
1841 NULL, /* flush */
1842 isdn_close,
1843 NULL /* fsync */
1844 };
1845
1846 char *
1847 isdn_map_eaz2msn(char *msn, int di)
1848 {
1849 driver *this = dev->drv[di];
1850 int i;
1851
1852 if (strlen(msn) == 1) {
1853 i = msn[0] - '0';
1854 if ((i >= 0) && (i <= 9))
1855 if (strlen(this->msn2eaz[i]))
1856 return (this->msn2eaz[i]);
1857 }
1858 return (msn);
1859 }
1860
1861 /*
1862 * Find an unused ISDN-channel, whose feature-flags match the
1863 * given L2- and L3-protocols.
1864 */
1865 #define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038))
1866
1867 int
1868 isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1869 ,int pre_chan)
1870 {
1871 int i;
1872 ulong flags;
1873 ulong features;
1874 ulong vfeatures;
1875 isdn_ctrl cmd;
1876
1877 save_flags(flags);
1878 cli();
1879 features = ((1 << l2_proto) | (0x10000 << l3_proto));
1880 vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1881 ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038));
1882 /* If Layer-2 protocol is V.110, accept drivers with
1883 * transparent feature even if these don't support V.110
1884 * because we can emulate this in linklevel.
1885 */
1886 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1887 if (USG_NONE(dev->usage[i]) &&
1888 (dev->drvmap[i] != -1)) {
1889 int d = dev->drvmap[i];
1890 if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1891 ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1892 continue;
1893 if ((dev->drv[d]->running)) {
1894 if (((dev->drv[d]->interface->features & features) == features) ||
1895 (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1896 (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1897 if ((pre_dev < 0) || (pre_chan < 0)) {
1898 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1899 dev->usage[i] |= usage;
1900 isdn_info_update();
1901 cmd.driver = d;
1902 cmd.arg = 0;
1903 cmd.command = ISDN_CMD_LOCK;
1904 isdn_command(&cmd);
1905 restore_flags(flags);
1906 return i;
1907 } else {
1908 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1909 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1910 dev->usage[i] |= usage;
1911 isdn_info_update();
1912 cmd.driver = d;
1913 cmd.arg = 0;
1914 cmd.command = ISDN_CMD_LOCK;
1915 isdn_command(&cmd);
1916 restore_flags(flags);
1917 return i;
1918 }
1919 }
1920 }
1921 }
1922 }
1923 restore_flags(flags);
1924 return -1;
1925 }
1926
1927 /*
1928 * Set state of ISDN-channel to 'unused'
1929 */
1930 void
1931 isdn_free_channel(int di, int ch, int usage)
1932 {
1933 int i;
1934 ulong flags;
1935 isdn_ctrl cmd;
1936
1937 save_flags(flags);
1938 cli();
1939 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1940 if (((dev->usage[i] & ISDN_USAGE_MASK) == usage) &&
1941 (dev->drvmap[i] == di) &&
1942 (dev->chanmap[i] == ch)) {
1943 dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1944 strcpy(dev->num[i], "???");
1945 dev->ibytes[i] = 0;
1946 dev->obytes[i] = 0;
1947 isdn_info_update();
1948 isdn_free_queue(&dev->drv[di]->rpqueue[ch]);
1949 cmd.driver = di;
1950 cmd.arg = ch;
1951 cmd.command = ISDN_CMD_UNLOCK;
1952 restore_flags(flags);
1953 isdn_command(&cmd);
1954 return;
1955 }
1956 restore_flags(flags);
1957 }
1958
1959 /*
1960 * Cancel Exclusive-Flag for ISDN-channel
1961 */
1962 void
1963 isdn_unexclusive_channel(int di, int ch)
1964 {
1965 int i;
1966 ulong flags;
1967
1968 save_flags(flags);
1969 cli();
1970 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1971 if ((dev->drvmap[i] == di) &&
1972 (dev->chanmap[i] == ch)) {
1973 dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1974 isdn_info_update();
1975 restore_flags(flags);
1976 return;
1977 }
1978 restore_flags(flags);
1979 }
1980
1981 /*
1982 * writebuf replacement for SKB_ABLE drivers
1983 */
1984 static int
1985 isdn_writebuf_stub(int drvidx, int chan, const u_char * buf, int len,
1986 int user)
1987 {
1988 int ret;
1989 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1990 struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1991
1992 if (!skb)
1993 return 0;
1994 skb_reserve(skb, hl);
1995 if (user)
1996 copy_from_user(skb_put(skb, len), buf, len);
1997 else
1998 memcpy(skb_put(skb, len), buf, len);
1999
2000 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
2001 if (ret <= 0)
2002 dev_kfree_skb(skb);
2003 if (ret > 0)
2004 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
2005 return ret;
2006 }
2007
2008 /*
2009 * Return: length of data on success, -ERRcode on failure.
2010 */
2011 int
2012 isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
2013 {
2014 int ret;
2015 struct sk_buff *nskb = NULL;
2016 int v110_ret = skb->len;
2017 int idx = isdn_dc2minor(drvidx, chan);
2018
2019 if (dev->v110[idx]) {
2020 atomic_inc(&dev->v110use[idx]);
2021 nskb = isdn_v110_encode(dev->v110[idx], skb);
2022 atomic_dec(&dev->v110use[idx]);
2023 if (!nskb)
2024 return 0;
2025 v110_ret = *((int *)nskb->data);
2026 skb_pull(nskb, sizeof(int));
2027 if (!nskb->len) {
2028 dev_kfree_skb(nskb);
2029 dev_kfree_skb(skb);
2030 return v110_ret;
2031 }
2032 /* V.110 must always be acknowledged */
2033 ack = 1;
2034 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
2035 } else
2036 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
2037 if (ret > 0) {
2038 dev->obytes[idx] += ret;
2039 if (dev->v110[idx]) {
2040 atomic_inc(&dev->v110use[idx]);
2041 dev->v110[idx]->skbuser++;
2042 atomic_dec(&dev->v110use[idx]);
2043 dev_kfree_skb(skb);
2044 /* For V.110 return unencoded data length */
2045 ret = v110_ret;
2046 if (ret == skb->len)
2047 dev_kfree_skb(skb);
2048 }
2049 } else
2050 if (dev->v110[idx])
2051 dev_kfree_skb(nskb);
2052 return ret;
2053 }
2054
2055 /*
2056 * Low-level-driver registration
2057 */
2058
2059 EXPORT_SYMBOL(register_isdn);
2060
2061 int
2062 register_isdn(isdn_if * i)
2063 {
2064 driver *d;
2065 int n,
2066 j,
2067 k;
2068 ulong flags;
2069 int drvidx;
2070
2071 if (dev->drivers >= ISDN_MAX_DRIVERS) {
2072 printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
2073 ISDN_MAX_DRIVERS);
2074 return 0;
2075 }
2076 n = i->channels;
2077 if (dev->channels + n > ISDN_MAX_CHANNELS) {
2078 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
2079 ISDN_MAX_CHANNELS);
2080 return 0;
2081 }
2082 if (!i->writebuf_skb) {
2083 printk(KERN_WARNING "register_isdn: No write routine given.\n");
2084 return 0;
2085 }
2086 if (!(d = (driver *) kmalloc(sizeof(driver), GFP_KERNEL))) {
2087 printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
2088 return 0;
2089 }
2090 memset((char *) d, 0, sizeof(driver));
2091 if (!(d->rcverr = (int *) kmalloc(sizeof(int) * n, GFP_KERNEL))) {
2092 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
2093 kfree(d);
2094 return 0;
2095 }
2096 memset((char *) d->rcverr, 0, sizeof(int) * n);
2097 if (!(d->rcvcount = (int *) kmalloc(sizeof(int) * n, GFP_KERNEL))) {
2098 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
2099 kfree(d->rcverr);
2100 kfree(d);
2101 return 0;
2102 }
2103 memset((char *) d->rcvcount, 0, sizeof(int) * n);
2104 if (!(d->rpqueue =
2105 (struct sk_buff_head *) kmalloc(sizeof(struct sk_buff_head) * n, GFP_KERNEL))) {
2106 printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
2107 kfree(d->rcvcount);
2108 kfree(d->rcverr);
2109 kfree(d);
2110 return 0;
2111 }
2112 for (j = 0; j < n; j++) {
2113 skb_queue_head_init(&d->rpqueue[j]);
2114 }
2115 if (!(d->rcv_waitq = (struct wait_queue **)
2116 kmalloc(sizeof(struct wait_queue *) * n, GFP_KERNEL))) {
2117 printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
2118 kfree(d->rpqueue);
2119 kfree(d->rcvcount);
2120 kfree(d->rcverr);
2121 kfree(d);
2122 return 0;
2123 }
2124 memset((char *) d->rcv_waitq, 0, sizeof(struct wait_queue *) * n);
2125 if (!(d->snd_waitq = (struct wait_queue **)
2126 kmalloc(sizeof(struct wait_queue *) * n, GFP_KERNEL))) {
2127 printk(KERN_WARNING "register_isdn: Could not alloc snd_waitq\n");
2128 kfree(d->rcv_waitq);
2129 kfree(d->rpqueue);
2130 kfree(d->rcvcount);
2131 kfree(d->rcverr);
2132 kfree(d);
2133 return 0;
2134 }
2135 memset((char *) d->snd_waitq, 0, sizeof(struct wait_queue *) * n);
2136 d->channels = n;
2137 d->loaded = 1;
2138 d->maxbufsize = i->maxbufsize;
2139 d->pktcount = 0;
2140 d->stavail = 0;
2141 d->running = 0;
2142 d->flags = 0;
2143 d->interface = i;
2144 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2145 if (!dev->drv[drvidx])
2146 break;
2147 i->channels = drvidx;
2148
2149 i->rcvcallb_skb = isdn_receive_skb_callback;
2150 i->statcallb = isdn_status_callback;
2151 if (!strlen(i->id))
2152 sprintf(i->id, "line%d", drvidx);
2153 save_flags(flags);
2154 cli();
2155 for (j = 0; j < drvidx; j++)
2156 if (!strcmp(i->id, dev->drvid[j]))
2157 sprintf(i->id, "line%d", drvidx);
2158 for (j = 0; j < n; j++)
2159 for (k = 0; k < ISDN_MAX_CHANNELS; k++)
2160 if (dev->chanmap[k] < 0) {
2161 dev->chanmap[k] = j;
2162 dev->drvmap[k] = drvidx;
2163 break;
2164 }
2165 dev->drv[drvidx] = d;
2166 dev->channels += n;
2167 strcpy(dev->drvid[drvidx], i->id);
2168 isdn_info_update();
2169 dev->drivers++;
2170 restore_flags(flags);
2171 return 1;
2172 }
2173
2174 /*
2175 *****************************************************************************
2176 * And now the modules code.
2177 *****************************************************************************
2178 */
2179
2180 extern int printk(const char *fmt,...);
2181
2182 #ifdef MODULE
2183 #define isdn_init init_module
2184 #endif
2185
2186 static char *
2187 isdn_getrev(const char *revision)
2188 {
2189 char *rev;
2190 char *p;
2191
2192 if ((p = strchr(revision, ':'))) {
2193 rev = p + 2;
2194 p = strchr(rev, '$');
2195 *--p = 0;
2196 } else
2197 rev = "???";
2198 return rev;
2199 }
2200
2201 /*
2202 * Allocate and initialize all data, register modem-devices
2203 */
2204 int
2205 isdn_init(void)
2206 {
2207 int i;
2208 char tmprev[50];
2209
2210 sti();
2211 if (!(dev = (isdn_dev *) kmalloc(sizeof(isdn_dev), GFP_KERNEL))) {
2212 printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
2213 return -EIO;
2214 }
2215 memset((char *) dev, 0, sizeof(isdn_dev));
2216 init_timer(&dev->timer);
2217 dev->timer.function = isdn_timer_funct;
2218 dev->sem = MUTEX;
2219 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2220 dev->drvmap[i] = -1;
2221 dev->chanmap[i] = -1;
2222 dev->m_idx[i] = -1;
2223 strcpy(dev->num[i], "???");
2224 }
2225 if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
2226 printk(KERN_WARNING "isdn: Could not register control devices\n");
2227 kfree(dev);
2228 return -EIO;
2229 }
2230 if ((i = isdn_tty_modem_init()) < 0) {
2231 printk(KERN_WARNING "isdn: Could not register tty devices\n");
2232 if (i == -3)
2233 tty_unregister_driver(&dev->mdm.cua_modem);
2234 if (i <= -2)
2235 tty_unregister_driver(&dev->mdm.tty_modem);
2236 kfree(dev);
2237 unregister_chrdev(ISDN_MAJOR, "isdn");
2238 return -EIO;
2239 }
2240 #ifdef CONFIG_ISDN_PPP
2241 if (isdn_ppp_init() < 0) {
2242 printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
2243 tty_unregister_driver(&dev->mdm.tty_modem);
2244 tty_unregister_driver(&dev->mdm.cua_modem);
2245 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
2246 kfree(dev->mdm.info[i].xmit_buf - 4);
2247 unregister_chrdev(ISDN_MAJOR, "isdn");
2248 kfree(dev);
2249 return -EIO;
2250 }
2251 #endif /* CONFIG_ISDN_PPP */
2252
2253 strcpy(tmprev, isdn_revision);
2254 printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
2255 strcpy(tmprev, isdn_tty_revision);
2256 printk("%s/", isdn_getrev(tmprev));
2257 strcpy(tmprev, isdn_net_revision);
2258 printk("%s/", isdn_getrev(tmprev));
2259 strcpy(tmprev, isdn_ppp_revision);
2260 printk("%s/", isdn_getrev(tmprev));
2261 strcpy(tmprev, isdn_audio_revision);
2262 printk("%s/", isdn_getrev(tmprev));
2263 strcpy(tmprev, isdn_v110_revision);
2264 printk("%s", isdn_getrev(tmprev));
2265
2266 #ifdef MODULE
2267 printk(" loaded\n");
2268 #else
2269 printk("\n");
2270 isdn_cards_init();
2271 #endif
2272 isdn_info_update();
2273 return 0;
2274 }
2275
2276 #ifdef MODULE
2277 /*
2278 * Unload module
2279 */
2280 void
2281 cleanup_module(void)
2282 {
2283 int flags;
2284 int i;
2285
2286 #ifdef CONFIG_ISDN_PPP
2287 isdn_ppp_cleanup();
2288 #endif
2289 save_flags(flags);
2290 cli();
2291 if (isdn_net_rmall() < 0) {
2292 printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
2293 restore_flags(flags);
2294 return;
2295 }
2296 if (tty_unregister_driver(&dev->mdm.tty_modem)) {
2297 printk(KERN_WARNING "isdn: ttyI-device busy, remove cancelled\n");
2298 restore_flags(flags);
2299 return;
2300 }
2301 if (tty_unregister_driver(&dev->mdm.cua_modem)) {
2302 printk(KERN_WARNING "isdn: cui-device busy, remove cancelled\n");
2303 restore_flags(flags);
2304 return;
2305 }
2306 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2307 isdn_tty_cleanup_xmit(&dev->mdm.info[i]);
2308 kfree(dev->mdm.info[i].xmit_buf - 4);
2309 }
2310 if (unregister_chrdev(ISDN_MAJOR, "isdn") != 0) {
2311 printk(KERN_WARNING "isdn: controldevice busy, remove cancelled\n");
2312 } else {
2313 del_timer(&dev->timer);
2314 kfree(dev);
2315 printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
2316 }
2317 restore_flags(flags);
2318 }
2319 #endif
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