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[NET]: Move hardware header operations out of netdevice.
[deliverable/linux.git] / drivers / isdn / i4l / isdn_net.c
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1da177e4
LT		 1/* $Id: isdn_net.c,v 1.1.2.2 2004/01/12 22:37:19 keil Exp $
2 *
3 * Linux ISDN subsystem, network interfaces and related functions (linklevel).
4 *
5 * Copyright 1994-1998 by Fritz Elfert (fritz@isdn4linux.de)
6 * Copyright 1995,96 by 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 * Data Over Voice (DOV) support added - Guy Ellis 23-Mar-02
13 * guy@traverse.com.au
14 * Outgoing calls - looks for a 'V' in first char of dialed number
15 * Incoming calls - checks first character of eaz as follows:
16 * Numeric - accept DATA only - original functionality
17 * 'V' - accept VOICE (DOV) only
18 * 'B' - accept BOTH DATA and DOV types
19 *
20 * Jan 2001: fix CISCO HDLC Bjoern A. Zeeb <i4l@zabbadoz.net>
21 * for info on the protocol, see
22 * http://i4l.zabbadoz.net/i4l/cisco-hdlc.txt
23 */
24
1da177e4
LT		 25#include <linux/isdn.h>
26#include <net/arp.h>
27#include <net/dst.h>
28#include <net/pkt_sched.h>
29#include <linux/inetdevice.h>
30#include "isdn_common.h"
31#include "isdn_net.h"
32#ifdef CONFIG_ISDN_PPP
33#include "isdn_ppp.h"
34#endif
35#ifdef CONFIG_ISDN_X25
36#include <linux/concap.h>
37#include "isdn_concap.h"
38#endif
39
40
41/*
42 * Outline of new tbusy handling:
43 *
44 * Old method, roughly spoken, consisted of setting tbusy when entering
45 * isdn_net_start_xmit() and at several other locations and clearing
46 * it from isdn_net_start_xmit() thread when sending was successful.
47 *
48 * With 2.3.x multithreaded network core, to prevent problems, tbusy should
49 * only be set by the isdn_net_start_xmit() thread and only when a tx-busy
50 * condition is detected. Other threads (in particular isdn_net_stat_callb())
51 * are only allowed to clear tbusy.
52 *
53 * -HE
54 */
55
56/*
57 * About SOFTNET:
58 * Most of the changes were pretty obvious and basically done by HE already.
59 *
60 * One problem of the isdn net device code is that is uses struct net_device
61 * for masters and slaves. However, only master interface are registered to
62 * the network layer, and therefore, it only makes sense to call netif_*
63 * functions on them.
64 *
65 * --KG
66 */
67
68/*
69 * Find out if the netdevice has been ifup-ed yet.
70 * For slaves, look at the corresponding master.
71 */
72static __inline__ int isdn_net_device_started(isdn_net_dev *n)
73{
74 isdn_net_local *lp = n->local;
75 struct net_device *dev;
76
77 if (lp->master)
78 dev = lp->master;
79 else
80 dev = &n->dev;
81 return netif_running(dev);
82}
83
84/*
85 * wake up the network -> net_device queue.
86 * For slaves, wake the corresponding master interface.
87 */
88static __inline__ void isdn_net_device_wake_queue(isdn_net_local *lp)
89{
90 if (lp->master)
91 netif_wake_queue(lp->master);
92 else
93 netif_wake_queue(&lp->netdev->dev);
94}
95
96/*
97 * stop the network -> net_device queue.
98 * For slaves, stop the corresponding master interface.
99 */
100static __inline__ void isdn_net_device_stop_queue(isdn_net_local *lp)
101{
102 if (lp->master)
103 netif_stop_queue(lp->master);
104 else
105 netif_stop_queue(&lp->netdev->dev);
106}
107
108/*
109 * find out if the net_device which this lp belongs to (lp can be
110 * master or slave) is busy. It's busy iff all (master and slave)
111 * queues are busy
112 */
113static __inline__ int isdn_net_device_busy(isdn_net_local *lp)
114{
115 isdn_net_local *nlp;
116 isdn_net_dev *nd;
117 unsigned long flags;
118
119 if (!isdn_net_lp_busy(lp))
120 return 0;
121
122 if (lp->master)
123 nd = ((isdn_net_local *) lp->master->priv)->netdev;
124 else
125 nd = lp->netdev;
126
127 spin_lock_irqsave(&nd->queue_lock, flags);
128 nlp = lp->next;
129 while (nlp != lp) {
130 if (!isdn_net_lp_busy(nlp)) {
131 spin_unlock_irqrestore(&nd->queue_lock, flags);
132 return 0;
133 }
134 nlp = nlp->next;
135 }
136 spin_unlock_irqrestore(&nd->queue_lock, flags);
137 return 1;
138}
139
140static __inline__ void isdn_net_inc_frame_cnt(isdn_net_local *lp)
141{
142 atomic_inc(&lp->frame_cnt);
143 if (isdn_net_device_busy(lp))
144 isdn_net_device_stop_queue(lp);
145}
146
147static __inline__ void isdn_net_dec_frame_cnt(isdn_net_local *lp)
148{
149 atomic_dec(&lp->frame_cnt);
150
151 if (!(isdn_net_device_busy(lp))) {
152 if (!skb_queue_empty(&lp->super_tx_queue)) {
153 schedule_work(&lp->tqueue);
154 } else {
155 isdn_net_device_wake_queue(lp);
156 }
157 }
158}
159
160static __inline__ void isdn_net_zero_frame_cnt(isdn_net_local *lp)
161{
162 atomic_set(&lp->frame_cnt, 0);
163}
164
165/* For 2.2.x we leave the transmitter busy timeout at 2 secs, just
166 * to be safe.
167 * For 2.3.x we push it up to 20 secs, because call establishment
168 * (in particular callback) may take such a long time, and we
169 * don't want confusing messages in the log. However, there is a slight
170 * possibility that this large timeout will break other things like MPPP,
171 * which might rely on the tx timeout. If so, we'll find out this way...
172 */
173
174#define ISDN_NET_TX_TIMEOUT (20*HZ)
175
176/* Prototypes */
177
3e206b0a 178static int isdn_net_force_dial_lp(isdn_net_local *);
1da177e4
LT		 179static int isdn_net_start_xmit(struct sk_buff *, struct net_device *);
180
181static void isdn_net_ciscohdlck_connected(isdn_net_local *lp);
182static void isdn_net_ciscohdlck_disconnected(isdn_net_local *lp);
183
184char *isdn_net_revision = "$Revision: 1.1.2.2 $";
185
186 /*
187 * Code for raw-networking over ISDN
188 */
189
190static void
191isdn_net_unreachable(struct net_device *dev, struct sk_buff *skb, char *reason)
192{
193 if(skb) {
194
195 u_short proto = ntohs(skb->protocol);
196
197 printk(KERN_DEBUG "isdn_net: %s: %s, signalling dst_link_failure %s\n",
198 dev->name,
199 (reason != NULL) ? reason : "unknown",
200 (proto != ETH_P_IP) ? "Protocol != ETH_P_IP" : "");
201
202 dst_link_failure(skb);
203 }
204 else { /* dial not triggered by rawIP packet */
205 printk(KERN_DEBUG "isdn_net: %s: %s\n",
206 dev->name,
207 (reason != NULL) ? reason : "reason unknown");
208 }
209}
210
211static void
212isdn_net_reset(struct net_device *dev)
213{
214#ifdef CONFIG_ISDN_X25
215 struct concap_device_ops * dops =
216 ( (isdn_net_local *) dev->priv ) -> dops;
217 struct concap_proto * cprot =
218 ( (isdn_net_local *) dev->priv ) -> netdev -> cprot;
219#endif
220#ifdef CONFIG_ISDN_X25
221 if( cprot && cprot -> pops && dops )
222 cprot -> pops -> restart ( cprot, dev, dops );
223#endif
224}
225
226/* Open/initialize the board. */
227static int
228isdn_net_open(struct net_device *dev)
229{
230 int i;
231 struct net_device *p;
232 struct in_device *in_dev;
233
234 /* moved here from isdn_net_reset, because only the master has an
235 interface associated which is supposed to be started. BTW:
236 we need to call netif_start_queue, not netif_wake_queue here */
237 netif_start_queue(dev);
238
239 isdn_net_reset(dev);
240 /* Fill in the MAC-level header (not needed, but for compatibility... */
241 for (i = 0; i < ETH_ALEN - sizeof(u32); i++)
242 dev->dev_addr[i] = 0xfc;
243 if ((in_dev = dev->ip_ptr) != NULL) {
244 /*
245 * Any address will do - we take the first
246 */
247 struct in_ifaddr *ifa = in_dev->ifa_list;
248 if (ifa != NULL)
249 memcpy(dev->dev_addr+2, &ifa->ifa_local, 4);
250 }
251
252 /* If this interface has slaves, start them also */
253
254 if ((p = (((isdn_net_local *) dev->priv)->slave))) {
255 while (p) {
256 isdn_net_reset(p);
257 p = (((isdn_net_local *) p->priv)->slave);
258 }
259 }
260 isdn_lock_drivers();
261 return 0;
262}
263
264/*
265 * Assign an ISDN-channel to a net-interface
266 */
267static void
268isdn_net_bind_channel(isdn_net_local * lp, int idx)
269{
270 lp->flags |= ISDN_NET_CONNECTED;
271 lp->isdn_device = dev->drvmap[idx];
272 lp->isdn_channel = dev->chanmap[idx];
273 dev->rx_netdev[idx] = lp->netdev;
274 dev->st_netdev[idx] = lp->netdev;
275}
276
277/*
278 * unbind a net-interface (resets interface after an error)
279 */
280static void
281isdn_net_unbind_channel(isdn_net_local * lp)
282{
283 skb_queue_purge(&lp->super_tx_queue);
284
285 if (!lp->master) { /* reset only master device */
286 /* Moral equivalent of dev_purge_queues():
287 BEWARE! This chunk of code cannot be called from hardware
288 interrupt handler. I hope it is true. --ANK
289 */
290 qdisc_reset(lp->netdev->dev.qdisc);
291 }
292 lp->dialstate = 0;
293 dev->rx_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
294 dev->st_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
295 isdn_free_channel(lp->isdn_device, lp->isdn_channel, ISDN_USAGE_NET);
296 lp->flags &= ~ISDN_NET_CONNECTED;
297 lp->isdn_device = -1;
298 lp->isdn_channel = -1;
299}
300
301/*
302 * Perform auto-hangup and cps-calculation for net-interfaces.
303 *
304 * auto-hangup:
305 * Increment idle-counter (this counter is reset on any incoming or
306 * outgoing packet), if counter exceeds configured limit either do a
307 * hangup immediately or - if configured - wait until just before the next
308 * charge-info.
309 *
310 * cps-calculation (needed for dynamic channel-bundling):
311 * Since this function is called every second, simply reset the
312 * byte-counter of the interface after copying it to the cps-variable.
313 */
3e206b0a 314static unsigned long last_jiffies = -HZ;
1da177e4
LT		 315
316void
317isdn_net_autohup(void)
318{
319 isdn_net_dev *p = dev->netdev;
320 int anymore;
321
322 anymore = 0;
323 while (p) {
324 isdn_net_local *l = p->local;
325 if (jiffies == last_jiffies)
326 l->cps = l->transcount;
327 else
328 l->cps = (l->transcount * HZ) / (jiffies - last_jiffies);
329 l->transcount = 0;
330 if (dev->net_verbose > 3)
331 printk(KERN_DEBUG "%s: %d bogocps\n", l->name, l->cps);
332 if ((l->flags & ISDN_NET_CONNECTED) && (!l->dialstate)) {
333 anymore = 1;
334 l->huptimer++;
335 /*
336 * if there is some dialmode where timeout-hangup
337 * should _not_ be done, check for that here
338 */
339 if ((l->onhtime) &&
340 (l->huptimer > l->onhtime))
341 {
342 if (l->hupflags & ISDN_MANCHARGE &&
343 l->hupflags & ISDN_CHARGEHUP) {
344 while (time_after(jiffies, l->chargetime + l->chargeint))
345 l->chargetime += l->chargeint;
346 if (time_after(jiffies, l->chargetime + l->chargeint - 2 * HZ))
347 if (l->outgoing || l->hupflags & ISDN_INHUP)
348 isdn_net_hangup(&p->dev);
349 } else if (l->outgoing) {
350 if (l->hupflags & ISDN_CHARGEHUP) {
351 if (l->hupflags & ISDN_WAITCHARGE) {
352 printk(KERN_DEBUG "isdn_net: Hupflags of %s are %X\n",
353 l->name, l->hupflags);
354 isdn_net_hangup(&p->dev);
355 } else if (time_after(jiffies, l->chargetime + l->chargeint)) {
356 printk(KERN_DEBUG
357 "isdn_net: %s: chtime = %lu, chint = %d\n",
358 l->name, l->chargetime, l->chargeint);
359 isdn_net_hangup(&p->dev);
360 }
361 } else
362 isdn_net_hangup(&p->dev);
363 } else if (l->hupflags & ISDN_INHUP)
364 isdn_net_hangup(&p->dev);
365 }
366
367 if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*l) == ISDN_NET_DM_OFF)) {
368 isdn_net_hangup(&p->dev);
369 break;
370 }
371 }
372 p = (isdn_net_dev *) p->next;
373 }
374 last_jiffies = jiffies;
375 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, anymore);
376}
377
378static void isdn_net_lp_disconnected(isdn_net_local *lp)
379{
380 isdn_net_rm_from_bundle(lp);
381}
382
383/*
384 * Handle status-messages from ISDN-interfacecard.
385 * This function is called from within the main-status-dispatcher
386 * isdn_status_callback, which itself is called from the low-level driver.
387 * Return: 1 = Event handled, 0 = not for us or unknown Event.
388 */
389int
390isdn_net_stat_callback(int idx, isdn_ctrl *c)
391{
392 isdn_net_dev *p = dev->st_netdev[idx];
393 int cmd = c->command;
394
395 if (p) {
396 isdn_net_local *lp = p->local;
397#ifdef CONFIG_ISDN_X25
398 struct concap_proto *cprot = lp->netdev->cprot;
399 struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
400#endif
401 switch (cmd) {
402 case ISDN_STAT_BSENT:
403 /* A packet has successfully been sent out */
404 if ((lp->flags & ISDN_NET_CONNECTED) &&
405 (!lp->dialstate)) {
406 isdn_net_dec_frame_cnt(lp);
407 lp->stats.tx_packets++;
408 lp->stats.tx_bytes += c->parm.length;
409 }
410 return 1;
411 case ISDN_STAT_DCONN:
412 /* D-Channel is up */
413 switch (lp->dialstate) {
414 case 4:
415 case 7:
416 case 8:
417 lp->dialstate++;
418 return 1;
419 case 12:
420 lp->dialstate = 5;
421 return 1;
422 }
423 break;
424 case ISDN_STAT_DHUP:
425 /* Either D-Channel-hangup or error during dialout */
426#ifdef CONFIG_ISDN_X25
427 /* If we are not connencted then dialing had
428 failed. If there are generic encap protocol
429 receiver routines signal the closure of
430 the link*/
431
432 if( !(lp->flags & ISDN_NET_CONNECTED)
433 && pops && pops -> disconn_ind )
434 pops -> disconn_ind(cprot);
435#endif /* CONFIG_ISDN_X25 */
436 if ((!lp->dialstate) && (lp->flags & ISDN_NET_CONNECTED)) {
437 if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
438 isdn_net_ciscohdlck_disconnected(lp);
439#ifdef CONFIG_ISDN_PPP
440 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
441 isdn_ppp_free(lp);
442#endif
443 isdn_net_lp_disconnected(lp);
444 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
445 printk(KERN_INFO "%s: remote hangup\n", lp->name);
446 printk(KERN_INFO "%s: Chargesum is %d\n", lp->name,
447 lp->charge);
448 isdn_net_unbind_channel(lp);
449 return 1;
450 }
451 break;
452#ifdef CONFIG_ISDN_X25
453 case ISDN_STAT_BHUP:
454 /* B-Channel-hangup */
455 /* try if there are generic encap protocol
456 receiver routines and signal the closure of
457 the link */
458 if( pops && pops -> disconn_ind ){
459 pops -> disconn_ind(cprot);
460 return 1;
461 }
462 break;
463#endif /* CONFIG_ISDN_X25 */
464 case ISDN_STAT_BCONN:
465 /* B-Channel is up */
466 isdn_net_zero_frame_cnt(lp);
467 switch (lp->dialstate) {
468 case 5:
469 case 6:
470 case 7:
471 case 8:
472 case 9:
473 case 10:
474 case 12:
475 if (lp->dialstate <= 6) {
476 dev->usage[idx] |= ISDN_USAGE_OUTGOING;
477 isdn_info_update();
478 } else
479 dev->rx_netdev[idx] = p;
480 lp->dialstate = 0;
481 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 1);
482 if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
483 isdn_net_ciscohdlck_connected(lp);
484 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP) {
485 if (lp->master) { /* is lp a slave? */
486 isdn_net_dev *nd = ((isdn_net_local *)lp->master->priv)->netdev;
487 isdn_net_add_to_bundle(nd, lp);
488 }
489 }
490 printk(KERN_INFO "isdn_net: %s connected\n", lp->name);
491 /* If first Chargeinfo comes before B-Channel connect,
492 * we correct the timestamp here.
493 */
494 lp->chargetime = jiffies;
495
496 /* reset dial-timeout */
497 lp->dialstarted = 0;
498 lp->dialwait_timer = 0;
499
500#ifdef CONFIG_ISDN_PPP
501 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
502 isdn_ppp_wakeup_daemon(lp);
503#endif
504#ifdef CONFIG_ISDN_X25
505 /* try if there are generic concap receiver routines */
506 if( pops )
507 if( pops->connect_ind)
508 pops->connect_ind(cprot);
509#endif /* CONFIG_ISDN_X25 */
510 /* ppp needs to do negotiations first */
511 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP)
512 isdn_net_device_wake_queue(lp);
513 return 1;
514 }
515 break;
516 case ISDN_STAT_NODCH:
517 /* No D-Channel avail. */
518 if (lp->dialstate == 4) {
519 lp->dialstate--;
520 return 1;
521 }
522 break;
523 case ISDN_STAT_CINF:
524 /* Charge-info from TelCo. Calculate interval between
525 * charge-infos and set timestamp for last info for
526 * usage by isdn_net_autohup()
527 */
528 lp->charge++;
529 if (lp->hupflags & ISDN_HAVECHARGE) {
530 lp->hupflags &= ~ISDN_WAITCHARGE;
531 lp->chargeint = jiffies - lp->chargetime - (2 * HZ);
532 }
533 if (lp->hupflags & ISDN_WAITCHARGE)
534 lp->hupflags |= ISDN_HAVECHARGE;
535 lp->chargetime = jiffies;
536 printk(KERN_DEBUG "isdn_net: Got CINF chargetime of %s now %lu\n",
537 lp->name, lp->chargetime);
538 return 1;
539 }
540 }
541 return 0;
542}
543
544/*
545 * Perform dialout for net-interfaces and timeout-handling for
546 * D-Channel-up and B-Channel-up Messages.
547 * This function is initially called from within isdn_net_start_xmit() or
548 * or isdn_net_find_icall() after initializing the dialstate for an
549 * interface. If further calls are needed, the function schedules itself
550 * for a timer-callback via isdn_timer_function().
551 * The dialstate is also affected by incoming status-messages from
552 * the ISDN-Channel which are handled in isdn_net_stat_callback() above.
553 */
554void
555isdn_net_dial(void)
556{
557 isdn_net_dev *p = dev->netdev;
558 int anymore = 0;
559 int i;
560 isdn_ctrl cmd;
561 u_char *phone_number;
562
563 while (p) {
564 isdn_net_local *lp = p->local;
565
566#ifdef ISDN_DEBUG_NET_DIAL
567 if (lp->dialstate)
568 printk(KERN_DEBUG "%s: dialstate=%d\n", lp->name, lp->dialstate);
569#endif
570 switch (lp->dialstate) {
571 case 0:
572 /* Nothing to do for this interface */
573 break;
574 case 1:
575 /* Initiate dialout. Set phone-number-pointer to first number
576 * of interface.
577 */
578 lp->dial = lp->phone[1];
579 if (!lp->dial) {
580 printk(KERN_WARNING "%s: phone number deleted?\n",
581 lp->name);
582 isdn_net_hangup(&p->dev);
583 break;
584 }
585 anymore = 1;
586
587 if(lp->dialtimeout > 0)
588 if(lp->dialstarted == 0 || time_after(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait)) {
589 lp->dialstarted = jiffies;
590 lp->dialwait_timer = 0;
591 }
592
593 lp->dialstate++;
594 /* Fall through */
595 case 2:
596 /* Prepare dialing. Clear EAZ, then set EAZ. */
597 cmd.driver = lp->isdn_device;
598 cmd.arg = lp->isdn_channel;
599 cmd.command = ISDN_CMD_CLREAZ;
600 isdn_command(&cmd);
601 sprintf(cmd.parm.num, "%s", isdn_map_eaz2msn(lp->msn, cmd.driver));
602 cmd.command = ISDN_CMD_SETEAZ;
603 isdn_command(&cmd);
604 lp->dialretry = 0;
605 anymore = 1;
606 lp->dialstate++;
607 /* Fall through */
608 case 3:
609 /* Setup interface, dial current phone-number, switch to next number.
610 * If list of phone-numbers is exhausted, increment
611 * retry-counter.
612 */
613 if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF)) {
614 char *s;
615 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
616 s = "dial suppressed: isdn system stopped";
617 else
618 s = "dial suppressed: dialmode `off'";
619 isdn_net_unreachable(&p->dev, NULL, s);
620 isdn_net_hangup(&p->dev);
621 break;
622 }
623 cmd.driver = lp->isdn_device;
624 cmd.command = ISDN_CMD_SETL2;
625 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
626 isdn_command(&cmd);
627 cmd.driver = lp->isdn_device;
628 cmd.command = ISDN_CMD_SETL3;
629 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
630 isdn_command(&cmd);
631 cmd.driver = lp->isdn_device;
632 cmd.arg = lp->isdn_channel;
633 if (!lp->dial) {
634 printk(KERN_WARNING "%s: phone number deleted?\n",
635 lp->name);
636 isdn_net_hangup(&p->dev);
637 break;
638 }
639 if (!strncmp(lp->dial->num, "LEASED", strlen("LEASED"))) {
640 lp->dialstate = 4;
641 printk(KERN_INFO "%s: Open leased line ...\n", lp->name);
642 } else {
643 if(lp->dialtimeout > 0)
644 if (time_after(jiffies, lp->dialstarted + lp->dialtimeout)) {
645 lp->dialwait_timer = jiffies + lp->dialwait;
646 lp->dialstarted = 0;
647 isdn_net_unreachable(&p->dev, NULL, "dial: timed out");
648 isdn_net_hangup(&p->dev);
649 break;
650 }
651
652 cmd.driver = lp->isdn_device;
653 cmd.command = ISDN_CMD_DIAL;
654 cmd.parm.setup.si2 = 0;
655
656 /* check for DOV */
657 phone_number = lp->dial->num;
658 if ((*phone_number == 'v') ||
659 (*phone_number == 'V')) { /* DOV call */
660 cmd.parm.setup.si1 = 1;
661 } else { /* DATA call */
662 cmd.parm.setup.si1 = 7;
663 }
664
665 strcpy(cmd.parm.setup.phone, phone_number);
666 /*
667 * Switch to next number or back to start if at end of list.
668 */
669 if (!(lp->dial = (isdn_net_phone *) lp->dial->next)) {
670 lp->dial = lp->phone[1];
671 lp->dialretry++;
672
673 if (lp->dialretry > lp->dialmax) {
674 if (lp->dialtimeout == 0) {
675 lp->dialwait_timer = jiffies + lp->dialwait;
676 lp->dialstarted = 0;
677 isdn_net_unreachable(&p->dev, NULL, "dial: tried all numbers dialmax times");
678 }
679 isdn_net_hangup(&p->dev);
680 break;
681 }
682 }
683 sprintf(cmd.parm.setup.eazmsn, "%s",
684 isdn_map_eaz2msn(lp->msn, cmd.driver));
685 i = isdn_dc2minor(lp->isdn_device, lp->isdn_channel);
686 if (i >= 0) {
687 strcpy(dev->num[i], cmd.parm.setup.phone);
688 dev->usage[i] |= ISDN_USAGE_OUTGOING;
689 isdn_info_update();
690 }
691 printk(KERN_INFO "%s: dialing %d %s... %s\n", lp->name,
692 lp->dialretry, cmd.parm.setup.phone,
693 (cmd.parm.setup.si1 == 1) ? "DOV" : "");
694 lp->dtimer = 0;
695#ifdef ISDN_DEBUG_NET_DIAL
696 printk(KERN_DEBUG "dial: d=%d c=%d\n", lp->isdn_device,
697 lp->isdn_channel);
698#endif
699 isdn_command(&cmd);
700 }
701 lp->huptimer = 0;
702 lp->outgoing = 1;
703 if (lp->chargeint) {
704 lp->hupflags |= ISDN_HAVECHARGE;
705 lp->hupflags &= ~ISDN_WAITCHARGE;
706 } else {
707 lp->hupflags |= ISDN_WAITCHARGE;
708 lp->hupflags &= ~ISDN_HAVECHARGE;
709 }
710 anymore = 1;
711 lp->dialstate =
712 (lp->cbdelay &&
713 (lp->flags & ISDN_NET_CBOUT)) ? 12 : 4;
714 break;
715 case 4:
716 /* Wait for D-Channel-connect.
717 * If timeout, switch back to state 3.
718 * Dialmax-handling moved to state 3.
719 */
720 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
721 lp->dialstate = 3;
722 anymore = 1;
723 break;
724 case 5:
725 /* Got D-Channel-Connect, send B-Channel-request */
726 cmd.driver = lp->isdn_device;
727 cmd.arg = lp->isdn_channel;
728 cmd.command = ISDN_CMD_ACCEPTB;
729 anymore = 1;
730 lp->dtimer = 0;
731 lp->dialstate++;
732 isdn_command(&cmd);
733 break;
734 case 6:
735 /* Wait for B- or D-Channel-connect. If timeout,
736 * switch back to state 3.
737 */
738#ifdef ISDN_DEBUG_NET_DIAL
739 printk(KERN_DEBUG "dialtimer2: %d\n", lp->dtimer);
740#endif
741 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
742 lp->dialstate = 3;
743 anymore = 1;
744 break;
745 case 7:
746 /* Got incoming Call, setup L2 and L3 protocols,
747 * then wait for D-Channel-connect
748 */
749#ifdef ISDN_DEBUG_NET_DIAL
750 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
751#endif
752 cmd.driver = lp->isdn_device;
753 cmd.command = ISDN_CMD_SETL2;
754 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
755 isdn_command(&cmd);
756 cmd.driver = lp->isdn_device;
757 cmd.command = ISDN_CMD_SETL3;
758 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
759 isdn_command(&cmd);
760 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT15)
761 isdn_net_hangup(&p->dev);
762 else {
763 anymore = 1;
764 lp->dialstate++;
765 }
766 break;
767 case 9:
768 /* Got incoming D-Channel-Connect, send B-Channel-request */
769 cmd.driver = lp->isdn_device;
770 cmd.arg = lp->isdn_channel;
771 cmd.command = ISDN_CMD_ACCEPTB;
772 isdn_command(&cmd);
773 anymore = 1;
774 lp->dtimer = 0;
775 lp->dialstate++;
776 break;
777 case 8:
778 case 10:
779 /* Wait for B- or D-channel-connect */
780#ifdef ISDN_DEBUG_NET_DIAL
781 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
782#endif
783 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
784 isdn_net_hangup(&p->dev);
785 else
786 anymore = 1;
787 break;
788 case 11:
789 /* Callback Delay */
790 if (lp->dtimer++ > lp->cbdelay)
791 lp->dialstate = 1;
792 anymore = 1;
793 break;
794 case 12:
795 /* Remote does callback. Hangup after cbdelay, then wait for incoming
796 * call (in state 4).
797 */
798 if (lp->dtimer++ > lp->cbdelay)
799 {
800 printk(KERN_INFO "%s: hangup waiting for callback ...\n", lp->name);
801 lp->dtimer = 0;
802 lp->dialstate = 4;
803 cmd.driver = lp->isdn_device;
804 cmd.command = ISDN_CMD_HANGUP;
805 cmd.arg = lp->isdn_channel;
806 isdn_command(&cmd);
807 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
808 }
809 anymore = 1;
810 break;
811 default:
812 printk(KERN_WARNING "isdn_net: Illegal dialstate %d for device %s\n",
813 lp->dialstate, lp->name);
814 }
815 p = (isdn_net_dev *) p->next;
816 }
817 isdn_timer_ctrl(ISDN_TIMER_NETDIAL, anymore);
818}
819
820/*
821 * Perform hangup for a net-interface.
822 */
823void
824isdn_net_hangup(struct net_device *d)
825{
826 isdn_net_local *lp = (isdn_net_local *) d->priv;
827 isdn_ctrl cmd;
828#ifdef CONFIG_ISDN_X25
829 struct concap_proto *cprot = lp->netdev->cprot;
830 struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
831#endif
832
833 if (lp->flags & ISDN_NET_CONNECTED) {
834 if (lp->slave != NULL) {
835 isdn_net_local *slp = (isdn_net_local *)lp->slave->priv;
836 if (slp->flags & ISDN_NET_CONNECTED) {
837 printk(KERN_INFO
838 "isdn_net: hang up slave %s before %s\n",
839 slp->name, lp->name);
840 isdn_net_hangup(lp->slave);
841 }
842 }
843 printk(KERN_INFO "isdn_net: local hangup %s\n", lp->name);
844#ifdef CONFIG_ISDN_PPP
845 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
846 isdn_ppp_free(lp);
847#endif
848 isdn_net_lp_disconnected(lp);
849#ifdef CONFIG_ISDN_X25
850 /* try if there are generic encap protocol
851 receiver routines and signal the closure of
852 the link */
853 if( pops && pops -> disconn_ind )
854 pops -> disconn_ind(cprot);
855#endif /* CONFIG_ISDN_X25 */
856
857 cmd.driver = lp->isdn_device;
858 cmd.command = ISDN_CMD_HANGUP;
859 cmd.arg = lp->isdn_channel;
860 isdn_command(&cmd);
861 printk(KERN_INFO "%s: Chargesum is %d\n", lp->name, lp->charge);
862 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
863 }
864 isdn_net_unbind_channel(lp);
865}
866
867typedef struct {
868 unsigned short source;
869 unsigned short dest;
870} ip_ports;
871
872static void
873isdn_net_log_skb(struct sk_buff * skb, isdn_net_local * lp)
874{
d56f90a7
ACM		 875 /* hopefully, this was set correctly */
876 const u_char *p = skb_network_header(skb);
1da177e4
LT		 877 unsigned short proto = ntohs(skb->protocol);
878 int data_ofs;
879 ip_ports *ipp;
880 char addinfo[100];
881
882 addinfo[0] = '\0';
883 /* This check stolen from 2.1.72 dev_queue_xmit_nit() */
27a884dc 884 if (p < skb->data || skb->network_header >= skb->tail) {
1da177e4
LT		 885 /* fall back to old isdn_net_log_packet method() */
886 char * buf = skb->data;
887
888 printk(KERN_DEBUG "isdn_net: protocol %04x is buggy, dev %s\n", skb->protocol, lp->name);
889 p = buf;
890 proto = ETH_P_IP;
891 switch (lp->p_encap) {
892 case ISDN_NET_ENCAP_IPTYP:
893 proto = ntohs(*(unsigned short *) &buf[0]);
894 p = &buf[2];
895 break;
896 case ISDN_NET_ENCAP_ETHER:
897 proto = ntohs(*(unsigned short *) &buf[12]);
898 p = &buf[14];
899 break;
900 case ISDN_NET_ENCAP_CISCOHDLC:
901 proto = ntohs(*(unsigned short *) &buf[2]);
902 p = &buf[4];
903 break;
904#ifdef CONFIG_ISDN_PPP
905 case ISDN_NET_ENCAP_SYNCPPP:
906 proto = ntohs(skb->protocol);
907 p = &buf[IPPP_MAX_HEADER];
908 break;
909#endif
910 }
911 }
912 data_ofs = ((p[0] & 15) * 4);
913 switch (proto) {
914 case ETH_P_IP:
915 switch (p[9]) {
916 case 1:
917 strcpy(addinfo, " ICMP");
918 break;
919 case 2:
920 strcpy(addinfo, " IGMP");
921 break;
922 case 4:
923 strcpy(addinfo, " IPIP");
924 break;
925 case 6:
926 ipp = (ip_ports *) (&p[data_ofs]);
927 sprintf(addinfo, " TCP, port: %d -> %d", ntohs(ipp->source),
928 ntohs(ipp->dest));
929 break;
930 case 8:
931 strcpy(addinfo, " EGP");
932 break;
933 case 12:
934 strcpy(addinfo, " PUP");
935 break;
936 case 17:
937 ipp = (ip_ports *) (&p[data_ofs]);
938 sprintf(addinfo, " UDP, port: %d -> %d", ntohs(ipp->source),
939 ntohs(ipp->dest));
940 break;
941 case 22:
942 strcpy(addinfo, " IDP");
943 break;
944 }
945 printk(KERN_INFO
946 "OPEN: %d.%d.%d.%d -> %d.%d.%d.%d%s\n",
947
948 p[12], p[13], p[14], p[15],
949 p[16], p[17], p[18], p[19],
950 addinfo);
951 break;
952 case ETH_P_ARP:
953 printk(KERN_INFO
954 "OPEN: ARP %d.%d.%d.%d -> *.*.*.* ?%d.%d.%d.%d\n",
955 p[14], p[15], p[16], p[17],
956 p[24], p[25], p[26], p[27]);
957 break;
958 }
959}
960
961/*
962 * this function is used to send supervisory data, i.e. data which was
963 * not received from the network layer, but e.g. frames from ipppd, CCP
964 * reset frames etc.
965 */
966void isdn_net_write_super(isdn_net_local *lp, struct sk_buff *skb)
967{
968 if (in_irq()) {
969 // we can't grab the lock from irq context,
970 // so we just queue the packet
971 skb_queue_tail(&lp->super_tx_queue, skb);
972 schedule_work(&lp->tqueue);
973 return;
974 }
975
976 spin_lock_bh(&lp->xmit_lock);
977 if (!isdn_net_lp_busy(lp)) {
978 isdn_net_writebuf_skb(lp, skb);
979 } else {
980 skb_queue_tail(&lp->super_tx_queue, skb);
981 }
982 spin_unlock_bh(&lp->xmit_lock);
983}
984
985/*
986 * called from tq_immediate
987 */
c4028958 988static void isdn_net_softint(struct work_struct *work)
1da177e4 989{
c4028958 990 isdn_net_local *lp = container_of(work, isdn_net_local, tqueue);
1da177e4
LT		 991 struct sk_buff *skb;
992
993 spin_lock_bh(&lp->xmit_lock);
994 while (!isdn_net_lp_busy(lp)) {
995 skb = skb_dequeue(&lp->super_tx_queue);
996 if (!skb)
997 break;
998 isdn_net_writebuf_skb(lp, skb);
999 }
1000 spin_unlock_bh(&lp->xmit_lock);
1001}
1002
1003/*
1004 * all frames sent from the (net) LL to a HL driver should go via this function
1005 * it's serialized by the caller holding the lp->xmit_lock spinlock
1006 */
1007void isdn_net_writebuf_skb(isdn_net_local *lp, struct sk_buff *skb)
1008{
1009 int ret;
1010 int len = skb->len; /* save len */
1011
1012 /* before obtaining the lock the caller should have checked that
1013 the lp isn't busy */
1014 if (isdn_net_lp_busy(lp)) {
1015 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1016 goto error;
1017 }
1018
1019 if (!(lp->flags & ISDN_NET_CONNECTED)) {
1020 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1021 goto error;
1022 }
1023 ret = isdn_writebuf_skb_stub(lp->isdn_device, lp->isdn_channel, 1, skb);
1024 if (ret != len) {
1025 /* we should never get here */
1026 printk(KERN_WARNING "%s: HL driver queue full\n", lp->name);
1027 goto error;
1028 }
1029
1030 lp->transcount += len;
1031 isdn_net_inc_frame_cnt(lp);
1032 return;
1033
1034 error:
1035 dev_kfree_skb(skb);
1036 lp->stats.tx_errors++;
1037
1038}
1039
1040
1041/*
1042 * Helper function for isdn_net_start_xmit.
1043 * When called, the connection is already established.
1044 * Based on cps-calculation, check if device is overloaded.
1045 * If so, and if a slave exists, trigger dialing for it.
1046 * If any slave is online, deliver packets using a simple round robin
1047 * scheme.
1048 *
1049 * Return: 0 on success, !0 on failure.
1050 */
1051
1052static int
1053isdn_net_xmit(struct net_device *ndev, struct sk_buff *skb)
1054{
1055 isdn_net_dev *nd;
1056 isdn_net_local *slp;
1057 isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1058 int retv = 0;
1059
1060 if (((isdn_net_local *) (ndev->priv))->master) {
1061 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1062 dev_kfree_skb(skb);
1063 return 0;
1064 }
1065
1066 /* For the other encaps the header has already been built */
1067#ifdef CONFIG_ISDN_PPP
1068 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
1069 return isdn_ppp_xmit(skb, ndev);
1070 }
1071#endif
1072 nd = ((isdn_net_local *) ndev->priv)->netdev;
1073 lp = isdn_net_get_locked_lp(nd);
1074 if (!lp) {
1075 printk(KERN_WARNING "%s: all channels busy - requeuing!\n", ndev->name);
1076 return 1;
1077 }
1078 /* we have our lp locked from now on */
1079
1080 /* Reset hangup-timeout */
1081 lp->huptimer = 0; // FIXME?
1082 isdn_net_writebuf_skb(lp, skb);
1083 spin_unlock_bh(&lp->xmit_lock);
1084
1085 /* the following stuff is here for backwards compatibility.
1086 * in future, start-up and hangup of slaves (based on current load)
1087 * should move to userspace and get based on an overall cps
1088 * calculation
1089 */
1090 if (lp->cps > lp->triggercps) {
1091 if (lp->slave) {
1092 if (!lp->sqfull) {
1093 /* First time overload: set timestamp only */
1094 lp->sqfull = 1;
1095 lp->sqfull_stamp = jiffies;
1096 } else {
1097 /* subsequent overload: if slavedelay exceeded, start dialing */
1098 if (time_after(jiffies, lp->sqfull_stamp + lp->slavedelay)) {
1099 slp = lp->slave->priv;
1100 if (!(slp->flags & ISDN_NET_CONNECTED)) {
1101 isdn_net_force_dial_lp((isdn_net_local *) lp->slave->priv);
1102 }
1103 }
1104 }
1105 }
1106 } else {
1107 if (lp->sqfull && time_after(jiffies, lp->sqfull_stamp + lp->slavedelay + (10 * HZ))) {
1108 lp->sqfull = 0;
1109 }
1110 /* this is a hack to allow auto-hangup for slaves on moderate loads */
1111 nd->queue = nd->local;
1112 }
1113
1114 return retv;
1115
1116}
1117
1118static void
1119isdn_net_adjust_hdr(struct sk_buff *skb, struct net_device *dev)
1120{
1121 isdn_net_local *lp = (isdn_net_local *) dev->priv;
1122 if (!skb)
1123 return;
1124 if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
bbe735e4 1125 const int pullsize = skb_network_offset(skb) - ETH_HLEN;
1da177e4
LT		 1126 if (pullsize > 0) {
1127 printk(KERN_DEBUG "isdn_net: Pull junk %d\n", pullsize);
1128 skb_pull(skb, pullsize);
1129 }
1130 }
1131}
1132
1133
3e206b0a 1134static void isdn_net_tx_timeout(struct net_device * ndev)
1da177e4
LT		 1135{
1136 isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1137
1138 printk(KERN_WARNING "isdn_tx_timeout dev %s dialstate %d\n", ndev->name, lp->dialstate);
1139 if (!lp->dialstate){
1140 lp->stats.tx_errors++;
1141 /*
1142 * There is a certain probability that this currently
1143 * works at all because if we always wake up the interface,
1144 * then upper layer will try to send the next packet
1145 * immediately. And then, the old clean_up logic in the
1146 * driver will hopefully continue to work as it used to do.
1147 *
1148 * This is rather primitive right know, we better should
1149 * clean internal queues here, in particular for multilink and
1150 * ppp, and reset HL driver's channel, too. --HE
1151 *
1152 * actually, this may not matter at all, because ISDN hardware
1153 * should not see transmitter hangs at all IMO
1154 * changed KERN_DEBUG to KERN_WARNING to find out if this is
1155 * ever called --KG
1156 */
1157 }
1158 ndev->trans_start = jiffies;
1159 netif_wake_queue(ndev);
1160}
1161
1162/*
1163 * Try sending a packet.
1164 * If this interface isn't connected to a ISDN-Channel, find a free channel,
1165 * and start dialing.
1166 */
1167static int
1168isdn_net_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1169{
1170 isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1171#ifdef CONFIG_ISDN_X25
1172 struct concap_proto * cprot = lp -> netdev -> cprot;
1173/* At this point hard_start_xmit() passes control to the encapsulation
1174 protocol (if present).
1175 For X.25 auto-dialing is completly bypassed because:
1176 - It does not conform with the semantics of a reliable datalink
1177 service as needed by X.25 PLP.
1178 - I don't want that the interface starts dialing when the network layer
1179 sends a message which requests to disconnect the lapb link (or if it
1180 sends any other message not resulting in data transmission).
1181 Instead, dialing will be initiated by the encapsulation protocol entity
1182 when a dl_establish request is received from the upper layer.
1183*/
1184 if (cprot && cprot -> pops) {
1185 int ret = cprot -> pops -> encap_and_xmit ( cprot , skb);
1186
1187 if (ret)
1188 netif_stop_queue(ndev);
1189 return ret;
1190 } else
1191#endif
1192 /* auto-dialing xmit function */
1193 {
1194#ifdef ISDN_DEBUG_NET_DUMP
1195 u_char *buf;
1196#endif
1197 isdn_net_adjust_hdr(skb, ndev);
1198#ifdef ISDN_DEBUG_NET_DUMP
1199 buf = skb->data;
1200 isdn_dumppkt("S:", buf, skb->len, 40);
1201#endif
1202
1203 if (!(lp->flags & ISDN_NET_CONNECTED)) {
1204 int chi;
1205 /* only do autodial if allowed by config */
1206 if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) {
1207 isdn_net_unreachable(ndev, skb, "dial rejected: interface not in dialmode `auto'");
1208 dev_kfree_skb(skb);
1209 return 0;
1210 }
1211 if (lp->phone[1]) {
1212 ulong flags;
1213
1214 if(lp->dialwait_timer <= 0)
1215 if(lp->dialstarted > 0 && lp->dialtimeout > 0 && time_before(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait))
1216 lp->dialwait_timer = lp->dialstarted + lp->dialtimeout + lp->dialwait;
1217
1218 if(lp->dialwait_timer > 0) {
1219 if(time_before(jiffies, lp->dialwait_timer)) {
1220 isdn_net_unreachable(ndev, skb, "dial rejected: retry-time not reached");
1221 dev_kfree_skb(skb);
1222 return 0;
1223 } else
1224 lp->dialwait_timer = 0;
1225 }
1226 /* Grab a free ISDN-Channel */
1227 spin_lock_irqsave(&dev->lock, flags);
1228 if (((chi =
1229 isdn_get_free_channel(
1230 ISDN_USAGE_NET,
1231 lp->l2_proto,
1232 lp->l3_proto,
1233 lp->pre_device,
1234 lp->pre_channel,
1235 lp->msn)
1236 ) < 0) &&
1237 ((chi =
1238 isdn_get_free_channel(
1239 ISDN_USAGE_NET,
1240 lp->l2_proto,
1241 lp->l3_proto,
1242 lp->pre_device,
1243 lp->pre_channel^1,
1244 lp->msn)
1245 ) < 0)) {
1246 spin_unlock_irqrestore(&dev->lock, flags);
1247 isdn_net_unreachable(ndev, skb,
1248 "No channel");
1249 dev_kfree_skb(skb);
1250 return 0;
1251 }
1252 /* Log packet, which triggered dialing */
1253 if (dev->net_verbose)
1254 isdn_net_log_skb(skb, lp);
1255 lp->dialstate = 1;
1256 /* Connect interface with channel */
1257 isdn_net_bind_channel(lp, chi);
1258#ifdef CONFIG_ISDN_PPP
1259 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
1260 /* no 'first_skb' handling for syncPPP */
1261 if (isdn_ppp_bind(lp) < 0) {
1262 dev_kfree_skb(skb);
1263 isdn_net_unbind_channel(lp);
1264 spin_unlock_irqrestore(&dev->lock, flags);
1265 return 0; /* STN (skb to nirvana) ;) */
1266 }
1267#ifdef CONFIG_IPPP_FILTER
1268 if (isdn_ppp_autodial_filter(skb, lp)) {
1269 isdn_ppp_free(lp);
1270 isdn_net_unbind_channel(lp);
1271 spin_unlock_irqrestore(&dev->lock, flags);
1272 isdn_net_unreachable(ndev, skb, "dial rejected: packet filtered");
1273 dev_kfree_skb(skb);
1274 return 0;
1275 }
1276#endif
1277 spin_unlock_irqrestore(&dev->lock, flags);
1278 isdn_net_dial(); /* Initiate dialing */
1279 netif_stop_queue(ndev);
1280 return 1; /* let upper layer requeue skb packet */
1281 }
1282#endif
1283 /* Initiate dialing */
1284 spin_unlock_irqrestore(&dev->lock, flags);
1285 isdn_net_dial();
1286 isdn_net_device_stop_queue(lp);
1287 return 1;
1288 } else {
1289 isdn_net_unreachable(ndev, skb,
1290 "No phone number");
1291 dev_kfree_skb(skb);
1292 return 0;
1293 }
1294 } else {
1295 /* Device is connected to an ISDN channel */
1296 ndev->trans_start = jiffies;
1297 if (!lp->dialstate) {
1298 /* ISDN connection is established, try sending */
1299 int ret;
1300 ret = (isdn_net_xmit(ndev, skb));
1301 if(ret) netif_stop_queue(ndev);
1302 return ret;
1303 } else
1304 netif_stop_queue(ndev);
1305 }
1306 }
1307 return 1;
1308}
1309
1310/*
1311 * Shutdown a net-interface.
1312 */
1313static int
1314isdn_net_close(struct net_device *dev)
1315{
1316 struct net_device *p;
1317#ifdef CONFIG_ISDN_X25
1318 struct concap_proto * cprot =
1319 ( (isdn_net_local *) dev->priv ) -> netdev -> cprot;
1320 /* printk(KERN_DEBUG "isdn_net_close %s\n" , dev-> name ); */
1321#endif
1322
1323#ifdef CONFIG_ISDN_X25
1324 if( cprot && cprot -> pops ) cprot -> pops -> close( cprot );
1325#endif
1326 netif_stop_queue(dev);
1327 if ((p = (((isdn_net_local *) dev->priv)->slave))) {
1328 /* If this interface has slaves, stop them also */
1329 while (p) {
1330#ifdef CONFIG_ISDN_X25
1331 cprot = ( (isdn_net_local *) p->priv )
1332 -> netdev -> cprot;
1333 if( cprot && cprot -> pops )
1334 cprot -> pops -> close( cprot );
1335#endif
1336 isdn_net_hangup(p);
1337 p = (((isdn_net_local *) p->priv)->slave);
1338 }
1339 }
1340 isdn_net_hangup(dev);
1341 isdn_unlock_drivers();
1342 return 0;
1343}
1344
1345/*
1346 * Get statistics
1347 */
1348static struct net_device_stats *
1349isdn_net_get_stats(struct net_device *dev)
1350{
1351 isdn_net_local *lp = (isdn_net_local *) dev->priv;
1352 return &lp->stats;
1353}
1354
1355/* This is simply a copy from std. eth.c EXCEPT we pull ETH_HLEN
1356 * instead of dev->hard_header_len off. This is done because the
1357 * lowlevel-driver has already pulled off its stuff when we get
1358 * here and this routine only gets called with p_encap == ETHER.
1359 * Determine the packet's protocol ID. The rule here is that we
1360 * assume 802.3 if the type field is short enough to be a length.
1361 * This is normal practice and works for any 'now in use' protocol.
1362 */
1363
1364static unsigned short
1365isdn_net_type_trans(struct sk_buff *skb, struct net_device *dev)
1366{
1367 struct ethhdr *eth;
1368 unsigned char *rawp;
1369
459a98ed 1370 skb_reset_mac_header(skb);
1da177e4
LT		 1371 skb_pull(skb, ETH_HLEN);
1372 eth = eth_hdr(skb);
1373
1374 if (*eth->h_dest & 1) {
1375 if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0)
1376 skb->pkt_type = PACKET_BROADCAST;
1377 else
1378 skb->pkt_type = PACKET_MULTICAST;
1379 }
1380 /*
1381 * This ALLMULTI check should be redundant by 1.4
1382 * so don't forget to remove it.
1383 */
1384
1385 else if (dev->flags & (IFF_PROMISC /*| IFF_ALLMULTI*/)) {
1386 if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
1387 skb->pkt_type = PACKET_OTHERHOST;
1388 }
1389 if (ntohs(eth->h_proto) >= 1536)
1390 return eth->h_proto;
1391
1392 rawp = skb->data;
1393
1394 /*
1395 * This is a magic hack to spot IPX packets. Older Novell breaks
1396 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
1397 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
1398 * won't work for fault tolerant netware but does for the rest.
1399 */
1400 if (*(unsigned short *) rawp == 0xFFFF)
1401 return htons(ETH_P_802_3);
1402 /*
1403 * Real 802.2 LLC
1404 */
1405 return htons(ETH_P_802_2);
1406}
1407
1408
1409/*
1410 * CISCO HDLC keepalive specific stuff
1411 */
1412static struct sk_buff*
1413isdn_net_ciscohdlck_alloc_skb(isdn_net_local *lp, int len)
1414{
1415 unsigned short hl = dev->drv[lp->isdn_device]->interface->hl_hdrlen;
1416 struct sk_buff *skb;
1417
1418 skb = alloc_skb(hl + len, GFP_ATOMIC);
1419 if (skb)
1420 skb_reserve(skb, hl);
1421 else
1422 printk("isdn out of mem at %s:%d!\n", __FILE__, __LINE__);
1423 return skb;
1424}
1425
1426/* cisco hdlck device private ioctls */
3e206b0a 1427static int
1da177e4
LT		 1428isdn_ciscohdlck_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1429{
1430 isdn_net_local *lp = (isdn_net_local *) dev->priv;
1431 unsigned long len = 0;
1432 unsigned long expires = 0;
1433 int tmp = 0;
1434 int period = lp->cisco_keepalive_period;
1435 s8 debserint = lp->cisco_debserint;
1436 int rc = 0;
1437
1438 if (lp->p_encap != ISDN_NET_ENCAP_CISCOHDLCK)
1439 return -EINVAL;
1440
1441 switch (cmd) {
1442 /* get/set keepalive period */
1443 case SIOCGKEEPPERIOD:
1444 len = (unsigned long)sizeof(lp->cisco_keepalive_period);
1445 if (copy_to_user(ifr->ifr_data,
1446 &lp->cisco_keepalive_period, len))
1447 rc = -EFAULT;
1448 break;
1449 case SIOCSKEEPPERIOD:
1450 tmp = lp->cisco_keepalive_period;
1451 len = (unsigned long)sizeof(lp->cisco_keepalive_period);
1452 if (copy_from_user(&period, ifr->ifr_data, len))
1453 rc = -EFAULT;
1454 if ((period > 0) && (period <= 32767))
1455 lp->cisco_keepalive_period = period;
1456 else
1457 rc = -EINVAL;
1458 if (!rc && (tmp != lp->cisco_keepalive_period)) {
1459 expires = (unsigned long)(jiffies +
1460 lp->cisco_keepalive_period * HZ);
1461 mod_timer(&lp->cisco_timer, expires);
1462 printk(KERN_INFO "%s: Keepalive period set "
1463 "to %d seconds.\n",
1464 lp->name, lp->cisco_keepalive_period);
1465 }
1466 break;
1467
1468 /* get/set debugging */
1469 case SIOCGDEBSERINT:
1470 len = (unsigned long)sizeof(lp->cisco_debserint);
1471 if (copy_to_user(ifr->ifr_data,
1472 &lp->cisco_debserint, len))
1473 rc = -EFAULT;
1474 break;
1475 case SIOCSDEBSERINT:
1476 len = (unsigned long)sizeof(lp->cisco_debserint);
1477 if (copy_from_user(&debserint,
1478 ifr->ifr_data, len))
1479 rc = -EFAULT;
1480 if ((debserint >= 0) && (debserint <= 64))
1481 lp->cisco_debserint = debserint;
1482 else
1483 rc = -EINVAL;
1484 break;
1485
1486 default:
1487 rc = -EINVAL;
1488 break;
1489 }
1490 return (rc);
1491}
1492
1493/* called via cisco_timer.function */
1494static void
1495isdn_net_ciscohdlck_slarp_send_keepalive(unsigned long data)
1496{
1497 isdn_net_local *lp = (isdn_net_local *) data;
1498 struct sk_buff *skb;
1499 unsigned char *p;
1500 unsigned long last_cisco_myseq = lp->cisco_myseq;
1501 int myseq_diff = 0;
1502
1503 if (!(lp->flags & ISDN_NET_CONNECTED) || lp->dialstate) {
1504 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1505 return;
1506 }
1507 lp->cisco_myseq++;
1508
1509 myseq_diff = (lp->cisco_myseq - lp->cisco_mineseen);
1510 if ((lp->cisco_line_state) && ((myseq_diff >= 3)||(myseq_diff <= -3))) {
1511 /* line up -> down */
1512 lp->cisco_line_state = 0;
1513 printk (KERN_WARNING
1514 "UPDOWN: Line protocol on Interface %s,"
1515 " changed state to down\n", lp->name);
1516 /* should stop routing higher-level data accross */
1517 } else if ((!lp->cisco_line_state) &&
1518 (myseq_diff >= 0) && (myseq_diff <= 2)) {
1519 /* line down -> up */
1520 lp->cisco_line_state = 1;
1521 printk (KERN_WARNING
1522 "UPDOWN: Line protocol on Interface %s,"
1523 " changed state to up\n", lp->name);
1524 /* restart routing higher-level data accross */
1525 }
1526
1527 if (lp->cisco_debserint)
1528 printk (KERN_DEBUG "%s: HDLC "
1529 "myseq %lu, mineseen %lu%c, yourseen %lu, %s\n",
1530 lp->name, last_cisco_myseq, lp->cisco_mineseen,
1531 ((last_cisco_myseq == lp->cisco_mineseen) ? '*' : 040),
1532 lp->cisco_yourseq,
1533 ((lp->cisco_line_state) ? "line up" : "line down"));
1534
1535 skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1536 if (!skb)
1537 return;
1538
1539 p = skb_put(skb, 4 + 14);
1540
1541 /* cisco header */
1542 p += put_u8 (p, CISCO_ADDR_UNICAST);
1543 p += put_u8 (p, CISCO_CTRL);
1544 p += put_u16(p, CISCO_TYPE_SLARP);
1545
1546 /* slarp keepalive */
1547 p += put_u32(p, CISCO_SLARP_KEEPALIVE);
1548 p += put_u32(p, lp->cisco_myseq);
1549 p += put_u32(p, lp->cisco_yourseq);
1550 p += put_u16(p, 0xffff); // reliablity, always 0xffff
1551
1552 isdn_net_write_super(lp, skb);
1553
1554 lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1555
1556 add_timer(&lp->cisco_timer);
1557}
1558
1559static void
1560isdn_net_ciscohdlck_slarp_send_request(isdn_net_local *lp)
1561{
1562 struct sk_buff *skb;
1563 unsigned char *p;
1564
1565 skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1566 if (!skb)
1567 return;
1568
1569 p = skb_put(skb, 4 + 14);
1570
1571 /* cisco header */
1572 p += put_u8 (p, CISCO_ADDR_UNICAST);
1573 p += put_u8 (p, CISCO_CTRL);
1574 p += put_u16(p, CISCO_TYPE_SLARP);
1575
1576 /* slarp request */
1577 p += put_u32(p, CISCO_SLARP_REQUEST);
1578 p += put_u32(p, 0); // address
1579 p += put_u32(p, 0); // netmask
1580 p += put_u16(p, 0); // unused
1581
1582 isdn_net_write_super(lp, skb);
1583}
1584
1585static void
1586isdn_net_ciscohdlck_connected(isdn_net_local *lp)
1587{
1588 lp->cisco_myseq = 0;
1589 lp->cisco_mineseen = 0;
1590 lp->cisco_yourseq = 0;
1591 lp->cisco_keepalive_period = ISDN_TIMER_KEEPINT;
1592 lp->cisco_last_slarp_in = 0;
1593 lp->cisco_line_state = 0;
1594 lp->cisco_debserint = 0;
1595
1596 /* send slarp request because interface/seq.no.s reset */
1597 isdn_net_ciscohdlck_slarp_send_request(lp);
1598
1599 init_timer(&lp->cisco_timer);
1600 lp->cisco_timer.data = (unsigned long) lp;
1601 lp->cisco_timer.function = isdn_net_ciscohdlck_slarp_send_keepalive;
1602 lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1603 add_timer(&lp->cisco_timer);
1604}
1605
1606static void
1607isdn_net_ciscohdlck_disconnected(isdn_net_local *lp)
1608{
1609 del_timer(&lp->cisco_timer);
1610}
1611
1612static void
1613isdn_net_ciscohdlck_slarp_send_reply(isdn_net_local *lp)
1614{
1615 struct sk_buff *skb;
1616 unsigned char *p;
1617 struct in_device *in_dev = NULL;
a144ea4b
AV		 1618 __be32 addr = 0; /* local ipv4 address */
1619 __be32 mask = 0; /* local netmask */
1da177e4
LT		 1620
1621 if ((in_dev = lp->netdev->dev.ip_ptr) != NULL) {
1622 /* take primary(first) address of interface */
1623 struct in_ifaddr *ifa = in_dev->ifa_list;
1624 if (ifa != NULL) {
1625 addr = ifa->ifa_local;
1626 mask = ifa->ifa_mask;
1627 }
1628 }
1629
1630 skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1631 if (!skb)
1632 return;
1633
1634 p = skb_put(skb, 4 + 14);
1635
1636 /* cisco header */
1637 p += put_u8 (p, CISCO_ADDR_UNICAST);
1638 p += put_u8 (p, CISCO_CTRL);
1639 p += put_u16(p, CISCO_TYPE_SLARP);
1640
1641 /* slarp reply, send own ip/netmask; if values are nonsense remote
1642 * should think we are unable to provide it with an address via SLARP */
1643 p += put_u32(p, CISCO_SLARP_REPLY);
1644 p += put_u32(p, addr); // address
1645 p += put_u32(p, mask); // netmask
1646 p += put_u16(p, 0); // unused
1647
1648 isdn_net_write_super(lp, skb);
1649}
1650
1651static void
1652isdn_net_ciscohdlck_slarp_in(isdn_net_local *lp, struct sk_buff *skb)
1653{
1654 unsigned char *p;
1655 int period;
1656 u32 code;
1657 u32 my_seq, addr;
1658 u32 your_seq, mask;
1659 u32 local;
1660 u16 unused;
1661
1662 if (skb->len < 14)
1663 return;
1664
1665 p = skb->data;
1666 p += get_u32(p, &code);
1667
1668 switch (code) {
1669 case CISCO_SLARP_REQUEST:
1670 lp->cisco_yourseq = 0;
1671 isdn_net_ciscohdlck_slarp_send_reply(lp);
1672 break;
1673 case CISCO_SLARP_REPLY:
1674 addr = ntohl(*(u32 *)p);
1675 mask = ntohl(*(u32 *)(p+4));
1676 if (mask != 0xfffffffc)
1677 goto slarp_reply_out;
1678 if ((addr & 3) == 0 || (addr & 3) == 3)
1679 goto slarp_reply_out;
1680 local = addr ^ 3;
1681 printk(KERN_INFO "%s: got slarp reply: "
1682 "remote ip: %d.%d.%d.%d, "
1683 "local ip: %d.%d.%d.%d "
1684 "mask: %d.%d.%d.%d\n",
1685 lp->name,
1686 HIPQUAD(addr),
1687 HIPQUAD(local),
1688 HIPQUAD(mask));
1689 break;
1690 slarp_reply_out:
1691 printk(KERN_INFO "%s: got invalid slarp "
1692 "reply (%d.%d.%d.%d/%d.%d.%d.%d) "
1693 "- ignored\n", lp->name,
1694 HIPQUAD(addr), HIPQUAD(mask));
1695 break;
1696 case CISCO_SLARP_KEEPALIVE:
1697 period = (int)((jiffies - lp->cisco_last_slarp_in
1698 + HZ/2 - 1) / HZ);
1699 if (lp->cisco_debserint &&
1700 (period != lp->cisco_keepalive_period) &&
1701 lp->cisco_last_slarp_in) {
1702 printk(KERN_DEBUG "%s: Keepalive period mismatch - "
1703 "is %d but should be %d.\n",
1704 lp->name, period, lp->cisco_keepalive_period);
1705 }
1706 lp->cisco_last_slarp_in = jiffies;
1707 p += get_u32(p, &my_seq);
1708 p += get_u32(p, &your_seq);
1709 p += get_u16(p, &unused);
1710 lp->cisco_yourseq = my_seq;
1711 lp->cisco_mineseen = your_seq;
1712 break;
1713 }
1714}
1715
1716static void
1717isdn_net_ciscohdlck_receive(isdn_net_local *lp, struct sk_buff *skb)
1718{
1719 unsigned char *p;
1720 u8 addr;
1721 u8 ctrl;
1722 u16 type;
1723
1724 if (skb->len < 4)
1725 goto out_free;
1726
1727 p = skb->data;
1728 p += get_u8 (p, &addr);
1729 p += get_u8 (p, &ctrl);
1730 p += get_u16(p, &type);
1731 skb_pull(skb, 4);
1732
1733 if (addr != CISCO_ADDR_UNICAST && addr != CISCO_ADDR_BROADCAST) {
1734 printk(KERN_WARNING "%s: Unknown Cisco addr 0x%02x\n",
1735 lp->name, addr);
1736 goto out_free;
1737 }
1738 if (ctrl != CISCO_CTRL) {
1739 printk(KERN_WARNING "%s: Unknown Cisco ctrl 0x%02x\n",
1740 lp->name, ctrl);
1741 goto out_free;
1742 }
1743
1744 switch (type) {
1745 case CISCO_TYPE_SLARP:
1746 isdn_net_ciscohdlck_slarp_in(lp, skb);
1747 goto out_free;
1748 case CISCO_TYPE_CDP:
1749 if (lp->cisco_debserint)
1750 printk(KERN_DEBUG "%s: Received CDP packet. use "
1751 "\"no cdp enable\" on cisco.\n", lp->name);
1752 goto out_free;
1753 default:
1754 /* no special cisco protocol */
1755 skb->protocol = htons(type);
1756 netif_rx(skb);
1757 return;
1758 }
1759
1760 out_free:
1761 kfree_skb(skb);
1762}
1763
1764/*
1765 * Got a packet from ISDN-Channel.
1766 */
1767static void
1768isdn_net_receive(struct net_device *ndev, struct sk_buff *skb)
1769{
1770 isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1771 isdn_net_local *olp = lp; /* original 'lp' */
1772#ifdef CONFIG_ISDN_X25
1773 struct concap_proto *cprot = lp -> netdev -> cprot;
1774#endif
1775 lp->transcount += skb->len;
1776
1777 lp->stats.rx_packets++;
1778 lp->stats.rx_bytes += skb->len;
1779 if (lp->master) {
1780 /* Bundling: If device is a slave-device, deliver to master, also
1781 * handle master's statistics and hangup-timeout
1782 */
1783 ndev = lp->master;
1784 lp = (isdn_net_local *) ndev->priv;
1785 lp->stats.rx_packets++;
1786 lp->stats.rx_bytes += skb->len;
1787 }
1788 skb->dev = ndev;
1da177e4 1789 skb->pkt_type = PACKET_HOST;
459a98ed 1790 skb_reset_mac_header(skb);
1da177e4
LT		 1791#ifdef ISDN_DEBUG_NET_DUMP
1792 isdn_dumppkt("R:", skb->data, skb->len, 40);
1793#endif
1794 switch (lp->p_encap) {
1795 case ISDN_NET_ENCAP_ETHER:
1796 /* Ethernet over ISDN */
1797 olp->huptimer = 0;
1798 lp->huptimer = 0;
1799 skb->protocol = isdn_net_type_trans(skb, ndev);
1800 break;
1801 case ISDN_NET_ENCAP_UIHDLC:
1802 /* HDLC with UI-frame (for ispa with -h1 option) */
1803 olp->huptimer = 0;
1804 lp->huptimer = 0;
1805 skb_pull(skb, 2);
1806 /* Fall through */
1807 case ISDN_NET_ENCAP_RAWIP:
1808 /* RAW-IP without MAC-Header */
1809 olp->huptimer = 0;
1810 lp->huptimer = 0;
1811 skb->protocol = htons(ETH_P_IP);
1812 break;
1813 case ISDN_NET_ENCAP_CISCOHDLCK:
1814 isdn_net_ciscohdlck_receive(lp, skb);
1815 return;
1816 case ISDN_NET_ENCAP_CISCOHDLC:
1817 /* CISCO-HDLC IP with type field and fake I-frame-header */
1818 skb_pull(skb, 2);
1819 /* Fall through */
1820 case ISDN_NET_ENCAP_IPTYP:
1821 /* IP with type field */
1822 olp->huptimer = 0;
1823 lp->huptimer = 0;
1824 skb->protocol = *(unsigned short *) &(skb->data[0]);
1825 skb_pull(skb, 2);
1826 if (*(unsigned short *) skb->data == 0xFFFF)
1827 skb->protocol = htons(ETH_P_802_3);
1828 break;
1829#ifdef CONFIG_ISDN_PPP
1830 case ISDN_NET_ENCAP_SYNCPPP:
1831 /* huptimer is done in isdn_ppp_push_higher */
1832 isdn_ppp_receive(lp->netdev, olp, skb);
1833 return;
1834#endif
1835
1836 default:
1837#ifdef CONFIG_ISDN_X25
1838 /* try if there are generic sync_device receiver routines */
1839 if(cprot) if(cprot -> pops)
1840 if( cprot -> pops -> data_ind){
1841 cprot -> pops -> data_ind(cprot,skb);
1842 return;
1843 };
1844#endif /* CONFIG_ISDN_X25 */
1845 printk(KERN_WARNING "%s: unknown encapsulation, dropping\n",
1846 lp->name);
1847 kfree_skb(skb);
1848 return;
1849 }
1850
1851 netif_rx(skb);
1852 return;
1853}
1854
1855/*
1856 * A packet arrived via ISDN. Search interface-chain for a corresponding
1857 * interface. If found, deliver packet to receiver-function and return 1,
1858 * else return 0.
1859 */
1860int
1861isdn_net_rcv_skb(int idx, struct sk_buff *skb)
1862{
1863 isdn_net_dev *p = dev->rx_netdev[idx];
1864
1865 if (p) {
1866 isdn_net_local *lp = p->local;
1867 if ((lp->flags & ISDN_NET_CONNECTED) &&
1868 (!lp->dialstate)) {
1869 isdn_net_receive(&p->dev, skb);
1870 return 1;
1871 }
1872 }
1873 return 0;
1874}
1875
1da177e4
LT		 1876/*
1877 * build an header
1878 * depends on encaps that is being used.
1879 */
1880
3b04ddde
SH		 1881static int isdn_net_header(struct sk_buff *skb, struct net_device *dev,
1882 unsigned short type,
1883 const void *daddr, const void *saddr, unsigned plen)
1da177e4
LT		 1884{
1885 isdn_net_local *lp = dev->priv;
1886 unsigned char *p;
1887 ushort len = 0;
1888
1889 switch (lp->p_encap) {
1890 case ISDN_NET_ENCAP_ETHER:
3b04ddde 1891 len = eth_header(skb, dev, type, daddr, saddr, plen);
1da177e4
LT		 1892 break;
1893#ifdef CONFIG_ISDN_PPP
1894 case ISDN_NET_ENCAP_SYNCPPP:
1895 /* stick on a fake header to keep fragmentation code happy. */
1896 len = IPPP_MAX_HEADER;
1897 skb_push(skb,len);
1898 break;
1899#endif
1900 case ISDN_NET_ENCAP_RAWIP:
1901 printk(KERN_WARNING "isdn_net_header called with RAW_IP!\n");
1902 len = 0;
1903 break;
1904 case ISDN_NET_ENCAP_IPTYP:
1905 /* ethernet type field */
1906 *((ushort *) skb_push(skb, 2)) = htons(type);
1907 len = 2;
1908 break;
1909 case ISDN_NET_ENCAP_UIHDLC:
1910 /* HDLC with UI-Frames (for ispa with -h1 option) */
1911 *((ushort *) skb_push(skb, 2)) = htons(0x0103);
1912 len = 2;
1913 break;
1914 case ISDN_NET_ENCAP_CISCOHDLC:
1915 case ISDN_NET_ENCAP_CISCOHDLCK:
1916 p = skb_push(skb, 4);
1917 p += put_u8 (p, CISCO_ADDR_UNICAST);
1918 p += put_u8 (p, CISCO_CTRL);
1919 p += put_u16(p, type);
1920 len = 4;
1921 break;
1922#ifdef CONFIG_ISDN_X25
1923 default:
1924 /* try if there are generic concap protocol routines */
1925 if( lp-> netdev -> cprot ){
1926 printk(KERN_WARNING "isdn_net_header called with concap_proto!\n");
1927 len = 0;
1928 break;
1929 }
1930 break;
1931#endif /* CONFIG_ISDN_X25 */
1932 }
1933 return len;
1934}
1935
1936/* We don't need to send arp, because we have point-to-point connections. */
1937static int
1938isdn_net_rebuild_header(struct sk_buff *skb)
1939{
1940 struct net_device *dev = skb->dev;
1941 isdn_net_local *lp = dev->priv;
1942 int ret = 0;
1943
1944 if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
1945 struct ethhdr *eth = (struct ethhdr *) skb->data;
1946
1947 /*
1948 * Only ARP/IP is currently supported
1949 */
1950
1951 if (eth->h_proto != htons(ETH_P_IP)) {
1952 printk(KERN_WARNING
1953 "isdn_net: %s don't know how to resolve type %d addresses?\n",
1954 dev->name, (int) eth->h_proto);
1955 memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
1956 return 0;
1957 }
1958 /*
1959 * Try to get ARP to resolve the header.
1960 */
1961#ifdef CONFIG_INET
1962 ret = arp_find(eth->h_dest, skb);
1963#endif
1964 }
1965 return ret;
1966}
1967
3b04ddde
SH		 1968static int isdn_header_cache(const struct neighbour *neigh, struct hh_cache *hh)
1969{
1970 const struct net_device *dev = neigh->dev;
1971 isdn_net_local *lp = dev->priv;
1972
1973 if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
1974 return eth_header_cache(neigh, hh);
1975 return -1;
1976}
1977
1978static void isdn_header_cache_update(struct hh_cache *hh,
1979 const struct net_device *dev,
1980 const unsigned char *haddr)
1981{
1982 isdn_net_local *lp = dev->priv;
1983 if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
1984 return eth_header_cache_update(hh, dev, haddr);
1985}
1986
1987static const struct header_ops isdn_header_ops = {
1988 .create = isdn_net_header,
1989 .rebuild = isdn_net_rebuild_header,
1990 .cache = isdn_header_cache,
1991 .cache_update = isdn_header_cache_update,
1992};
1993
1da177e4
LT		 1994/*
1995 * Interface-setup. (just after registering a new interface)
1996 */
1997static int
1998isdn_net_init(struct net_device *ndev)
1999{
2000 ushort max_hlhdr_len = 0;
3b04ddde 2001 int drvidx;
1da177e4
LT		 2002
2003 ether_setup(ndev);
3b04ddde 2004 ndev->header_ops = NULL;
1da177e4
LT		 2005
2006 /* Setup the generic properties */
1da177e4
LT		 2007 ndev->mtu = 1500;
2008 ndev->flags = IFF_NOARP|IFF_POINTOPOINT;
2009 ndev->type = ARPHRD_ETHER;
2010 ndev->addr_len = ETH_ALEN;
2011
2012 /* for clients with MPPP maybe higher values better */
2013 ndev->tx_queue_len = 30;
2014
1da177e4
LT		 2015 /* The ISDN-specific entries in the device structure. */
2016 ndev->open = &isdn_net_open;
2017 ndev->hard_start_xmit = &isdn_net_start_xmit;
2018
2019 /*
2020 * up till binding we ask the protocol layer to reserve as much
2021 * as we might need for HL layer
2022 */
2023
2024 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2025 if (dev->drv[drvidx])
2026 if (max_hlhdr_len < dev->drv[drvidx]->interface->hl_hdrlen)
2027 max_hlhdr_len = dev->drv[drvidx]->interface->hl_hdrlen;
2028
2029 ndev->hard_header_len = ETH_HLEN + max_hlhdr_len;
2030 ndev->stop = &isdn_net_close;
2031 ndev->get_stats = &isdn_net_get_stats;
1da177e4
LT		 2032 ndev->do_ioctl = NULL;
2033 return 0;
2034}
2035
2036static void
2037isdn_net_swapbind(int drvidx)
2038{
2039 isdn_net_dev *p;
2040
2041#ifdef ISDN_DEBUG_NET_ICALL
2042 printk(KERN_DEBUG "n_fi: swapping ch of %d\n", drvidx);
2043#endif
2044 p = dev->netdev;
2045 while (p) {
2046 if (p->local->pre_device == drvidx)
2047 switch (p->local->pre_channel) {
2048 case 0:
2049 p->local->pre_channel = 1;
2050 break;
2051 case 1:
2052 p->local->pre_channel = 0;
2053 break;
2054 }
2055 p = (isdn_net_dev *) p->next;
2056 }
2057}
2058
2059static void
2060isdn_net_swap_usage(int i1, int i2)
2061{
2062 int u1 = dev->usage[i1] & ISDN_USAGE_EXCLUSIVE;
2063 int u2 = dev->usage[i2] & ISDN_USAGE_EXCLUSIVE;
2064
2065#ifdef ISDN_DEBUG_NET_ICALL
2066 printk(KERN_DEBUG "n_fi: usage of %d and %d\n", i1, i2);
2067#endif
2068 dev->usage[i1] &= ~ISDN_USAGE_EXCLUSIVE;
2069 dev->usage[i1] |= u2;
2070 dev->usage[i2] &= ~ISDN_USAGE_EXCLUSIVE;
2071 dev->usage[i2] |= u1;
2072 isdn_info_update();
2073}
2074
2075/*
2076 * An incoming call-request has arrived.
2077 * Search the interface-chain for an appropriate interface.
2078 * If found, connect the interface to the ISDN-channel and initiate
2079 * D- and B-Channel-setup. If secure-flag is set, accept only
2080 * configured phone-numbers. If callback-flag is set, initiate
2081 * callback-dialing.
2082 *
2083 * Return-Value: 0 = No appropriate interface for this call.
2084 * 1 = Call accepted
2085 * 2 = Reject call, wait cbdelay, then call back
2086 * 3 = Reject call
2087 * 4 = Wait cbdelay, then call back
2088 * 5 = No appropriate interface for this call,
2089 * would eventually match if CID was longer.
2090 */
2091
2092int
2093isdn_net_find_icall(int di, int ch, int idx, setup_parm *setup)
2094{
2095 char *eaz;
2096 int si1;
2097 int si2;
2098 int ematch;
2099 int wret;
2100 int swapped;
2101 int sidx = 0;
2102 u_long flags;
2103 isdn_net_dev *p;
2104 isdn_net_phone *n;
2105 char nr[32];
2106 char *my_eaz;
2107
2108 /* Search name in netdev-chain */
2109 if (!setup->phone[0]) {
2110 nr[0] = '0';
2111 nr[1] = '\0';
2112 printk(KERN_INFO "isdn_net: Incoming call without OAD, assuming '0'\n");
2113 } else
2114 strcpy(nr, setup->phone);
2115 si1 = (int) setup->si1;
2116 si2 = (int) setup->si2;
2117 if (!setup->eazmsn[0]) {
2118 printk(KERN_WARNING "isdn_net: Incoming call without CPN, assuming '0'\n");
2119 eaz = "0";
2120 } else
2121 eaz = setup->eazmsn;
2122 if (dev->net_verbose > 1)
2123 printk(KERN_INFO "isdn_net: call from %s,%d,%d -> %s\n", nr, si1, si2, eaz);
2124 /* Accept DATA and VOICE calls at this stage
2125 * local eaz is checked later for allowed call types
2126 */
2127 if ((si1 != 7) && (si1 != 1)) {
2128 if (dev->net_verbose > 1)
2129 printk(KERN_INFO "isdn_net: Service-Indicator not 1 or 7, ignored\n");
2130 return 0;
2131 }
2132 n = (isdn_net_phone *) 0;
2133 p = dev->netdev;
2134 ematch = wret = swapped = 0;
2135#ifdef ISDN_DEBUG_NET_ICALL
2136 printk(KERN_DEBUG "n_fi: di=%d ch=%d idx=%d usg=%d\n", di, ch, idx,
2137 dev->usage[idx]);
2138#endif
2139 while (p) {
2140 int matchret;
2141 isdn_net_local *lp = p->local;
2142
2143 /* If last check has triggered as binding-swap, revert it */
2144 switch (swapped) {
2145 case 2:
2146 isdn_net_swap_usage(idx, sidx);
2147 /* fall through */
2148 case 1:
2149 isdn_net_swapbind(di);
2150 break;
2151 }
2152 swapped = 0;
2153 /* check acceptable call types for DOV */
2154 my_eaz = isdn_map_eaz2msn(lp->msn, di);
2155 if (si1 == 1) { /* it's a DOV call, check if we allow it */
2156 if (*my_eaz == 'v' || *my_eaz == 'V' ||
2157 *my_eaz == 'b' || *my_eaz == 'B')
2158 my_eaz++; /* skip to allow a match */
2159 else
2160 my_eaz = NULL; /* force non match */
2161 } else { /* it's a DATA call, check if we allow it */
2162 if (*my_eaz == 'b' || *my_eaz == 'B')
2163 my_eaz++; /* skip to allow a match */
2164 }
2165 if (my_eaz)
2166 matchret = isdn_msncmp(eaz, my_eaz);
2167 else
2168 matchret = 1;
2169 if (!matchret)
2170 ematch = 1;
2171
2172 /* Remember if more numbers eventually can match */
2173 if (matchret > wret)
2174 wret = matchret;
2175#ifdef ISDN_DEBUG_NET_ICALL
2176 printk(KERN_DEBUG "n_fi: if='%s', l.msn=%s, l.flags=%d, l.dstate=%d\n",
2177 lp->name, lp->msn, lp->flags, lp->dialstate);
2178#endif
2179 if ((!matchret) && /* EAZ is matching */
2180 (((!(lp->flags & ISDN_NET_CONNECTED)) && /* but not connected */
2181 (USG_NONE(dev->usage[idx]))) || /* and ch. unused or */
2182 ((((lp->dialstate == 4) || (lp->dialstate == 12)) && /* if dialing */
2183 (!(lp->flags & ISDN_NET_CALLBACK))) /* but no callback */
2184 )))
2185 {
2186#ifdef ISDN_DEBUG_NET_ICALL
2187 printk(KERN_DEBUG "n_fi: match1, pdev=%d pch=%d\n",
2188 lp->pre_device, lp->pre_channel);
2189#endif
2190 if (dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) {
2191 if ((lp->pre_channel != ch) ||
2192 (lp->pre_device != di)) {
2193 /* Here we got a problem:
2194 * If using an ICN-Card, an incoming call is always signaled on
2195 * on the first channel of the card, if both channels are
2196 * down. However this channel may be bound exclusive. If the
2197 * second channel is free, this call should be accepted.
2198 * The solution is horribly but it runs, so what:
2199 * We exchange the exclusive bindings of the two channels, the
2200 * corresponding variables in the interface-structs.
2201 */
2202 if (ch == 0) {
2203 sidx = isdn_dc2minor(di, 1);
2204#ifdef ISDN_DEBUG_NET_ICALL
2205 printk(KERN_DEBUG "n_fi: ch is 0\n");
2206#endif
2207 if (USG_NONE(dev->usage[sidx])) {
2208 /* Second Channel is free, now see if it is bound
2209 * exclusive too. */
2210 if (dev->usage[sidx] & ISDN_USAGE_EXCLUSIVE) {
2211#ifdef ISDN_DEBUG_NET_ICALL
2212 printk(KERN_DEBUG "n_fi: 2nd channel is down and bound\n");
2213#endif
2214 /* Yes, swap bindings only, if the original
2215 * binding is bound to channel 1 of this driver */
2216 if ((lp->pre_device == di) &&
2217 (lp->pre_channel == 1)) {
2218 isdn_net_swapbind(di);
2219 swapped = 1;
2220 } else {
2221 /* ... else iterate next device */
2222 p = (isdn_net_dev *) p->next;
2223 continue;
2224 }
2225 } else {
2226#ifdef ISDN_DEBUG_NET_ICALL
2227 printk(KERN_DEBUG "n_fi: 2nd channel is down and unbound\n");
2228#endif
2229 /* No, swap always and swap excl-usage also */
2230 isdn_net_swap_usage(idx, sidx);
2231 isdn_net_swapbind(di);
2232 swapped = 2;
2233 }
2234 /* Now check for exclusive binding again */
2235#ifdef ISDN_DEBUG_NET_ICALL
2236 printk(KERN_DEBUG "n_fi: final check\n");
2237#endif
2238 if ((dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) &&
2239 ((lp->pre_channel != ch) ||
2240 (lp->pre_device != di))) {
2241#ifdef ISDN_DEBUG_NET_ICALL
2242 printk(KERN_DEBUG "n_fi: final check failed\n");
2243#endif
2244 p = (isdn_net_dev *) p->next;
2245 continue;
2246 }
2247 }
2248 } else {
2249 /* We are already on the second channel, so nothing to do */
2250#ifdef ISDN_DEBUG_NET_ICALL
2251 printk(KERN_DEBUG "n_fi: already on 2nd channel\n");
2252#endif
2253 }
2254 }
2255 }
2256#ifdef ISDN_DEBUG_NET_ICALL
2257 printk(KERN_DEBUG "n_fi: match2\n");
2258#endif
2259 n = lp->phone[0];
2260 if (lp->flags & ISDN_NET_SECURE) {
2261 while (n) {
2262 if (!isdn_msncmp(nr, n->num))
2263 break;
2264 n = (isdn_net_phone *) n->next;
2265 }
2266 }
2267 if (n || (!(lp->flags & ISDN_NET_SECURE))) {
2268#ifdef ISDN_DEBUG_NET_ICALL
2269 printk(KERN_DEBUG "n_fi: match3\n");
2270#endif
2271 /* matching interface found */
2272
2273 /*
2274 * Is the state STOPPED?
2275 * If so, no dialin is allowed,
2276 * so reject actively.
2277 * */
2278 if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2279 printk(KERN_INFO "incoming call, interface %s `stopped' -> rejected\n",
2280 lp->name);
2281 return 3;
2282 }
2283 /*
2284 * Is the interface up?
2285 * If not, reject the call actively.
2286 */
2287 if (!isdn_net_device_started(p)) {
2288 printk(KERN_INFO "%s: incoming call, interface down -> rejected\n",
2289 lp->name);
2290 return 3;
2291 }
2292 /* Interface is up, now see if it's a slave. If so, see if
2293 * it's master and parent slave is online. If not, reject the call.
2294 */
2295 if (lp->master) {
2296 isdn_net_local *mlp = (isdn_net_local *) lp->master->priv;
2297 printk(KERN_DEBUG "ICALLslv: %s\n", lp->name);
2298 printk(KERN_DEBUG "master=%s\n", mlp->name);
2299 if (mlp->flags & ISDN_NET_CONNECTED) {
2300 printk(KERN_DEBUG "master online\n");
2301 /* Master is online, find parent-slave (master if first slave) */
2302 while (mlp->slave) {
2303 if ((isdn_net_local *) mlp->slave->priv == lp)
2304 break;
2305 mlp = (isdn_net_local *) mlp->slave->priv;
2306 }
2307 } else
2308 printk(KERN_DEBUG "master offline\n");
2309 /* Found parent, if it's offline iterate next device */
2310 printk(KERN_DEBUG "mlpf: %d\n", mlp->flags & ISDN_NET_CONNECTED);
2311 if (!(mlp->flags & ISDN_NET_CONNECTED)) {
2312 p = (isdn_net_dev *) p->next;
2313 continue;
2314 }
2315 }
2316 if (lp->flags & ISDN_NET_CALLBACK) {
2317 int chi;
2318 /*
2319 * Is the state MANUAL?
2320 * If so, no callback can be made,
2321 * so reject actively.
2322 * */
2323 if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2324 printk(KERN_INFO "incoming call for callback, interface %s `off' -> rejected\n",
2325 lp->name);
2326 return 3;
2327 }
2328 printk(KERN_DEBUG "%s: call from %s -> %s, start callback\n",
2329 lp->name, nr, eaz);
2330 if (lp->phone[1]) {
2331 /* Grab a free ISDN-Channel */
2332 spin_lock_irqsave(&dev->lock, flags);
2333 if ((chi =
2334 isdn_get_free_channel(
2335 ISDN_USAGE_NET,
2336 lp->l2_proto,
2337 lp->l3_proto,
2338 lp->pre_device,
2339 lp->pre_channel,
2340 lp->msn)
2341 ) < 0) {
2342
2343 printk(KERN_WARNING "isdn_net_find_icall: No channel for %s\n", lp->name);
2344 spin_unlock_irqrestore(&dev->lock, flags);
2345 return 0;
2346 }
2347 /* Setup dialstate. */
2348 lp->dtimer = 0;
2349 lp->dialstate = 11;
2350 /* Connect interface with channel */
2351 isdn_net_bind_channel(lp, chi);
2352#ifdef CONFIG_ISDN_PPP
2353 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2354 if (isdn_ppp_bind(lp) < 0) {
2355 spin_unlock_irqrestore(&dev->lock, flags);
2356 isdn_net_unbind_channel(lp);
2357 return 0;
2358 }
2359#endif
2360 spin_unlock_irqrestore(&dev->lock, flags);
2361 /* Initiate dialing by returning 2 or 4 */
2362 return (lp->flags & ISDN_NET_CBHUP) ? 2 : 4;
2363 } else
2364 printk(KERN_WARNING "isdn_net: %s: No phone number\n", lp->name);
2365 return 0;
2366 } else {
2367 printk(KERN_DEBUG "%s: call from %s -> %s accepted\n", lp->name, nr,
2368 eaz);
2369 /* if this interface is dialing, it does it probably on a different
2370 device, so free this device */
2371 if ((lp->dialstate == 4) || (lp->dialstate == 12)) {
2372#ifdef CONFIG_ISDN_PPP
2373 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2374 isdn_ppp_free(lp);
2375#endif
2376 isdn_net_lp_disconnected(lp);
2377 isdn_free_channel(lp->isdn_device, lp->isdn_channel,
2378 ISDN_USAGE_NET);
2379 }
2380 spin_lock_irqsave(&dev->lock, flags);
2381 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2382 dev->usage[idx] |= ISDN_USAGE_NET;
2383 strcpy(dev->num[idx], nr);
2384 isdn_info_update();
2385 dev->st_netdev[idx] = lp->netdev;
2386 lp->isdn_device = di;
2387 lp->isdn_channel = ch;
2388 lp->ppp_slot = -1;
2389 lp->flags |= ISDN_NET_CONNECTED;
2390 lp->dialstate = 7;
2391 lp->dtimer = 0;
2392 lp->outgoing = 0;
2393 lp->huptimer = 0;
2394 lp->hupflags |= ISDN_WAITCHARGE;
2395 lp->hupflags &= ~ISDN_HAVECHARGE;
2396#ifdef CONFIG_ISDN_PPP
2397 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
2398 if (isdn_ppp_bind(lp) < 0) {
2399 isdn_net_unbind_channel(lp);
2400 spin_unlock_irqrestore(&dev->lock, flags);
2401 return 0;
2402 }
2403 }
2404#endif
2405 spin_unlock_irqrestore(&dev->lock, flags);
2406 return 1;
2407 }
2408 }
2409 }
2410 p = (isdn_net_dev *) p->next;
2411 }
2412 /* If none of configured EAZ/MSN matched and not verbose, be silent */
2413 if (!ematch || dev->net_verbose)
2414 printk(KERN_INFO "isdn_net: call from %s -> %d %s ignored\n", nr, di, eaz);
2415 return (wret == 2)?5:0;
2416}
2417
2418/*
2419 * Search list of net-interfaces for an interface with given name.
2420 */
2421isdn_net_dev *
2422isdn_net_findif(char *name)
2423{
2424 isdn_net_dev *p = dev->netdev;
2425
2426 while (p) {
2427 if (!strcmp(p->local->name, name))
2428 return p;
2429 p = (isdn_net_dev *) p->next;
2430 }
2431 return (isdn_net_dev *) NULL;
2432}
2433
2434/*
2435 * Force a net-interface to dial out.
2436 * This is called from the userlevel-routine below or
2437 * from isdn_net_start_xmit().
2438 */
3e206b0a 2439static int
1da177e4
LT		 2440isdn_net_force_dial_lp(isdn_net_local * lp)
2441{
2442 if ((!(lp->flags & ISDN_NET_CONNECTED)) && !lp->dialstate) {
2443 int chi;
2444 if (lp->phone[1]) {
2445 ulong flags;
2446
2447 /* Grab a free ISDN-Channel */
2448 spin_lock_irqsave(&dev->lock, flags);
2449 if ((chi = isdn_get_free_channel(
2450 ISDN_USAGE_NET,
2451 lp->l2_proto,
2452 lp->l3_proto,
2453 lp->pre_device,
2454 lp->pre_channel,
2455 lp->msn)) < 0) {
2456 printk(KERN_WARNING "isdn_net_force_dial: No channel for %s\n", lp->name);
2457 spin_unlock_irqrestore(&dev->lock, flags);
2458 return -EAGAIN;
2459 }
2460 lp->dialstate = 1;
2461 /* Connect interface with channel */
2462 isdn_net_bind_channel(lp, chi);
2463#ifdef CONFIG_ISDN_PPP
2464 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2465 if (isdn_ppp_bind(lp) < 0) {
2466 isdn_net_unbind_channel(lp);
2467 spin_unlock_irqrestore(&dev->lock, flags);
2468 return -EAGAIN;
2469 }
2470#endif
2471 /* Initiate dialing */
2472 spin_unlock_irqrestore(&dev->lock, flags);
2473 isdn_net_dial();
2474 return 0;
2475 } else
2476 return -EINVAL;
2477 } else
2478 return -EBUSY;
2479}
2480
2481/*
2482 * This is called from certain upper protocol layers (multilink ppp
2483 * and x25iface encapsulation module) that want to initiate dialing
2484 * themselves.
2485 */
2486int
2487isdn_net_dial_req(isdn_net_local * lp)
2488{
2489 /* is there a better error code? */
2490 if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) return -EBUSY;
2491
2492 return isdn_net_force_dial_lp(lp);
2493}
2494
2495/*
2496 * Force a net-interface to dial out.
2497 * This is always called from within userspace (ISDN_IOCTL_NET_DIAL).
2498 */
2499int
2500isdn_net_force_dial(char *name)
2501{
2502 isdn_net_dev *p = isdn_net_findif(name);
2503
2504 if (!p)
2505 return -ENODEV;
2506 return (isdn_net_force_dial_lp(p->local));
2507}
2508
2509/*
2510 * Allocate a new network-interface and initialize its data structures.
2511 */
2512char *
2513isdn_net_new(char *name, struct net_device *master)
2514{
2515 isdn_net_dev *netdev;
2516
2517 /* Avoid creating an existing interface */
2518 if (isdn_net_findif(name)) {
2519 printk(KERN_WARNING "isdn_net: interface %s already exists\n", name);
2520 return NULL;
2521 }
41f96935 2522 if (!(netdev = kzalloc(sizeof(isdn_net_dev), GFP_KERNEL))) {
1da177e4
LT		 2523 printk(KERN_WARNING "isdn_net: Could not allocate net-device\n");
2524 return NULL;
2525 }
41f96935 2526 if (!(netdev->local = kzalloc(sizeof(isdn_net_local), GFP_KERNEL))) {
1da177e4
LT		 2527 printk(KERN_WARNING "isdn_net: Could not allocate device locals\n");
2528 kfree(netdev);
2529 return NULL;
2530 }
1da177e4
LT		 2531 if (name == NULL)
2532 strcpy(netdev->local->name, " ");
2533 else
2534 strcpy(netdev->local->name, name);
2535 strcpy(netdev->dev.name, netdev->local->name);
2536 netdev->dev.priv = netdev->local;
2537 netdev->dev.init = isdn_net_init;
2538 netdev->local->p_encap = ISDN_NET_ENCAP_RAWIP;
2539 if (master) {
2540 /* Device shall be a slave */
2541 struct net_device *p = (((isdn_net_local *) master->priv)->slave);
2542 struct net_device *q = master;
2543
2544 netdev->local->master = master;
2545 /* Put device at end of slave-chain */
2546 while (p) {
2547 q = p;
2548 p = (((isdn_net_local *) p->priv)->slave);
2549 }
2550 ((isdn_net_local *) q->priv)->slave = &(netdev->dev);
2551 } else {
2552 /* Device shall be a master */
2553 /*
2554 * Watchdog timer (currently) for master only.
2555 */
2556 netdev->dev.tx_timeout = isdn_net_tx_timeout;
2557 netdev->dev.watchdog_timeo = ISDN_NET_TX_TIMEOUT;
2558 if (register_netdev(&netdev->dev) != 0) {
2559 printk(KERN_WARNING "isdn_net: Could not register net-device\n");
2560 kfree(netdev->local);
2561 kfree(netdev);
2562 return NULL;
2563 }
2564 }
2565 netdev->local->magic = ISDN_NET_MAGIC;
2566
2567 netdev->queue = netdev->local;
2568 spin_lock_init(&netdev->queue_lock);
2569
2570 netdev->local->last = netdev->local;
2571 netdev->local->netdev = netdev;
2572 netdev->local->next = netdev->local;
2573
c4028958 2574 INIT_WORK(&netdev->local->tqueue, isdn_net_softint);
1da177e4
LT		 2575 spin_lock_init(&netdev->local->xmit_lock);
2576
2577 netdev->local->isdn_device = -1;
2578 netdev->local->isdn_channel = -1;
2579 netdev->local->pre_device = -1;
2580 netdev->local->pre_channel = -1;
2581 netdev->local->exclusive = -1;
2582 netdev->local->ppp_slot = -1;
2583 netdev->local->pppbind = -1;
2584 skb_queue_head_init(&netdev->local->super_tx_queue);
2585 netdev->local->l2_proto = ISDN_PROTO_L2_X75I;
2586 netdev->local->l3_proto = ISDN_PROTO_L3_TRANS;
2587 netdev->local->triggercps = 6000;
2588 netdev->local->slavedelay = 10 * HZ;
2589 netdev->local->hupflags = ISDN_INHUP; /* Do hangup even on incoming calls */
2590 netdev->local->onhtime = 10; /* Default hangup-time for saving costs
2591 of those who forget configuring this */
2592 netdev->local->dialmax = 1;
2593 netdev->local->flags = ISDN_NET_CBHUP | ISDN_NET_DM_MANUAL; /* Hangup before Callback, manual dial */
2594 netdev->local->cbdelay = 25; /* Wait 5 secs before Callback */
2595 netdev->local->dialtimeout = -1; /* Infinite Dial-Timeout */
2596 netdev->local->dialwait = 5 * HZ; /* Wait 5 sec. after failed dial */
2597 netdev->local->dialstarted = 0; /* Jiffies of last dial-start */
2598 netdev->local->dialwait_timer = 0; /* Jiffies of earliest next dial-start */
2599
2600 /* Put into to netdev-chain */
2601 netdev->next = (void *) dev->netdev;
2602 dev->netdev = netdev;
2603 return netdev->dev.name;
2604}
2605
2606char *
2607isdn_net_newslave(char *parm)
2608{
2609 char *p = strchr(parm, ',');
2610 isdn_net_dev *n;
2611 char newname[10];
2612
2613 if (p) {
2614 /* Slave-Name MUST not be empty */
2615 if (!strlen(p + 1))
2616 return NULL;
2617 strcpy(newname, p + 1);
2618 *p = 0;
2619 /* Master must already exist */
2620 if (!(n = isdn_net_findif(parm)))
2621 return NULL;
2622 /* Master must be a real interface, not a slave */
2623 if (n->local->master)
2624 return NULL;
2625 /* Master must not be started yet */
2626 if (isdn_net_device_started(n))
2627 return NULL;
2628 return (isdn_net_new(newname, &(n->dev)));
2629 }
2630 return NULL;
2631}
2632
2633/*
2634 * Set interface-parameters.
2635 * Always set all parameters, so the user-level application is responsible
2636 * for not overwriting existing setups. It has to get the current
2637 * setup first, if only selected parameters are to be changed.
2638 */
2639int
2640isdn_net_setcfg(isdn_net_ioctl_cfg * cfg)
2641{
2642 isdn_net_dev *p = isdn_net_findif(cfg->name);
2643 ulong features;
2644 int i;
2645 int drvidx;
2646 int chidx;
2647 char drvid[25];
2648
2649 if (p) {
2650 isdn_net_local *lp = p->local;
2651
2652 /* See if any registered driver supports the features we want */
2653 features = ((1 << cfg->l2_proto) << ISDN_FEATURE_L2_SHIFT) |
2654 ((1 << cfg->l3_proto) << ISDN_FEATURE_L3_SHIFT);
2655 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2656 if (dev->drv[i])
2657 if ((dev->drv[i]->interface->features & features) == features)
2658 break;
2659 if (i == ISDN_MAX_DRIVERS) {
2660 printk(KERN_WARNING "isdn_net: No driver with selected features\n");
2661 return -ENODEV;
2662 }
2663 if (lp->p_encap != cfg->p_encap){
2664#ifdef CONFIG_ISDN_X25
2665 struct concap_proto * cprot = p -> cprot;
2666#endif
2667 if (isdn_net_device_started(p)) {
2668 printk(KERN_WARNING "%s: cannot change encap when if is up\n",
2669 lp->name);
2670 return -EBUSY;
2671 }
2672#ifdef CONFIG_ISDN_X25
2673 if( cprot && cprot -> pops )
2674 cprot -> pops -> proto_del ( cprot );
2675 p -> cprot = NULL;
2676 lp -> dops = NULL;
2677 /* ... , prepare for configuration of new one ... */
2678 switch ( cfg -> p_encap ){
2679 case ISDN_NET_ENCAP_X25IFACE:
2680 lp -> dops = &isdn_concap_reliable_dl_dops;
2681 }
2682 /* ... and allocate new one ... */
2683 p -> cprot = isdn_concap_new( cfg -> p_encap );
2684 /* p -> cprot == NULL now if p_encap is not supported
2685 by means of the concap_proto mechanism */
2686 /* the protocol is not configured yet; this will
2687 happen later when isdn_net_reset() is called */
2688#endif
2689 }
2690 switch ( cfg->p_encap ) {
2691 case ISDN_NET_ENCAP_SYNCPPP:
2692#ifndef CONFIG_ISDN_PPP
2693 printk(KERN_WARNING "%s: SyncPPP support not configured\n",
2694 lp->name);
2695 return -EINVAL;
2696#else
2697 p->dev.type = ARPHRD_PPP; /* change ARP type */
2698 p->dev.addr_len = 0;
2699 p->dev.do_ioctl = isdn_ppp_dev_ioctl;
2700#endif
2701 break;
2702 case ISDN_NET_ENCAP_X25IFACE:
2703#ifndef CONFIG_ISDN_X25
2704 printk(KERN_WARNING "%s: isdn-x25 support not configured\n",
2705 p->local->name);
2706 return -EINVAL;
2707#else
2708 p->dev.type = ARPHRD_X25; /* change ARP type */
2709 p->dev.addr_len = 0;
2710#endif
2711 break;
2712 case ISDN_NET_ENCAP_CISCOHDLCK:
2713 p->dev.do_ioctl = isdn_ciscohdlck_dev_ioctl;
2714 break;
2715 default:
2716 if( cfg->p_encap >= 0 &&
2717 cfg->p_encap <= ISDN_NET_ENCAP_MAX_ENCAP )
2718 break;
2719 printk(KERN_WARNING
2720 "%s: encapsulation protocol %d not supported\n",
2721 p->local->name, cfg->p_encap);
2722 return -EINVAL;
2723 }
2724 if (strlen(cfg->drvid)) {
2725 /* A bind has been requested ... */
2726 char *c,
2727 *e;
2728
2729 drvidx = -1;
2730 chidx = -1;
2731 strcpy(drvid, cfg->drvid);
2732 if ((c = strchr(drvid, ','))) {
2733 /* The channel-number is appended to the driver-Id with a comma */
2734 chidx = (int) simple_strtoul(c + 1, &e, 10);
2735 if (e == c)
2736 chidx = -1;
2737 *c = '\0';
2738 }
2739 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2740 /* Lookup driver-Id in array */
2741 if (!(strcmp(dev->drvid[i], drvid))) {
2742 drvidx = i;
2743 break;
2744 }
2745 if ((drvidx == -1) || (chidx == -1))
2746 /* Either driver-Id or channel-number invalid */
2747 return -ENODEV;
2748 } else {
2749 /* Parameters are valid, so get them */
2750 drvidx = lp->pre_device;
2751 chidx = lp->pre_channel;
2752 }
2753 if (cfg->exclusive > 0) {
2754 unsigned long flags;
2755
2756 /* If binding is exclusive, try to grab the channel */
2757 spin_lock_irqsave(&dev->lock, flags);
2758 if ((i = isdn_get_free_channel(ISDN_USAGE_NET,
2759 lp->l2_proto, lp->l3_proto, drvidx,
2760 chidx, lp->msn)) < 0) {
2761 /* Grab failed, because desired channel is in use */
2762 lp->exclusive = -1;
2763 spin_unlock_irqrestore(&dev->lock, flags);
2764 return -EBUSY;
2765 }
2766 /* All went ok, so update isdninfo */
2767 dev->usage[i] = ISDN_USAGE_EXCLUSIVE;
2768 isdn_info_update();
2769 spin_unlock_irqrestore(&dev->lock, flags);
2770 lp->exclusive = i;
2771 } else {
2772 /* Non-exclusive binding or unbind. */
2773 lp->exclusive = -1;
2774 if ((lp->pre_device != -1) && (cfg->exclusive == -1)) {
2775 isdn_unexclusive_channel(lp->pre_device, lp->pre_channel);
2776 isdn_free_channel(lp->pre_device, lp->pre_channel, ISDN_USAGE_NET);
2777 drvidx = -1;
2778 chidx = -1;
2779 }
2780 }
2781 strcpy(lp->msn, cfg->eaz);
2782 lp->pre_device = drvidx;
2783 lp->pre_channel = chidx;
2784 lp->onhtime = cfg->onhtime;
2785 lp->charge = cfg->charge;
2786 lp->l2_proto = cfg->l2_proto;
2787 lp->l3_proto = cfg->l3_proto;
2788 lp->cbdelay = cfg->cbdelay;
2789 lp->dialmax = cfg->dialmax;
2790 lp->triggercps = cfg->triggercps;
2791 lp->slavedelay = cfg->slavedelay * HZ;
2792 lp->pppbind = cfg->pppbind;
2793 lp->dialtimeout = cfg->dialtimeout >= 0 ? cfg->dialtimeout * HZ : -1;
2794 lp->dialwait = cfg->dialwait * HZ;
2795 if (cfg->secure)
2796 lp->flags |= ISDN_NET_SECURE;
2797 else
2798 lp->flags &= ~ISDN_NET_SECURE;
2799 if (cfg->cbhup)
2800 lp->flags |= ISDN_NET_CBHUP;
2801 else
2802 lp->flags &= ~ISDN_NET_CBHUP;
2803 switch (cfg->callback) {
2804 case 0:
2805 lp->flags &= ~(ISDN_NET_CALLBACK | ISDN_NET_CBOUT);
2806 break;
2807 case 1:
2808 lp->flags |= ISDN_NET_CALLBACK;
2809 lp->flags &= ~ISDN_NET_CBOUT;
2810 break;
2811 case 2:
2812 lp->flags |= ISDN_NET_CBOUT;
2813 lp->flags &= ~ISDN_NET_CALLBACK;
2814 break;
2815 }
2816 lp->flags &= ~ISDN_NET_DIALMODE_MASK; /* first all bits off */
2817 if (cfg->dialmode && !(cfg->dialmode & ISDN_NET_DIALMODE_MASK)) {
2818 /* old isdnctrl version, where only 0 or 1 is given */
2819 printk(KERN_WARNING
2820 "Old isdnctrl version detected! Please update.\n");
2821 lp->flags |= ISDN_NET_DM_OFF; /* turn on `off' bit */
2822 }
2823 else {
2824 lp->flags |= cfg->dialmode; /* turn on selected bits */
2825 }
2826 if (cfg->chargehup)
2827 lp->hupflags |= ISDN_CHARGEHUP;
2828 else
2829 lp->hupflags &= ~ISDN_CHARGEHUP;
2830 if (cfg->ihup)
2831 lp->hupflags |= ISDN_INHUP;
2832 else
2833 lp->hupflags &= ~ISDN_INHUP;
2834 if (cfg->chargeint > 10) {
2835 lp->hupflags |= ISDN_CHARGEHUP | ISDN_HAVECHARGE | ISDN_MANCHARGE;
2836 lp->chargeint = cfg->chargeint * HZ;
2837 }
2838 if (cfg->p_encap != lp->p_encap) {
2839 if (cfg->p_encap == ISDN_NET_ENCAP_RAWIP) {
3b04ddde 2840 p->dev.header_ops = NULL;
1da177e4
LT		 2841 p->dev.flags = IFF_NOARP|IFF_POINTOPOINT;
2842 } else {
3b04ddde
SH		 2843 p->dev.header_ops = &isdn_header_ops;
2844 if (cfg->p_encap == ISDN_NET_ENCAP_ETHER)
1da177e4 2845 p->dev.flags = IFF_BROADCAST | IFF_MULTICAST;
3b04ddde 2846 else
1da177e4 2847 p->dev.flags = IFF_NOARP|IFF_POINTOPOINT;
1da177e4
LT		 2848 }
2849 }
2850 lp->p_encap = cfg->p_encap;
2851 return 0;
2852 }
2853 return -ENODEV;
2854}
2855
2856/*
2857 * Perform get-interface-parameters.ioctl
2858 */
2859int
2860isdn_net_getcfg(isdn_net_ioctl_cfg * cfg)
2861{
2862 isdn_net_dev *p = isdn_net_findif(cfg->name);
2863
2864 if (p) {
2865 isdn_net_local *lp = p->local;
2866
2867 strcpy(cfg->eaz, lp->msn);
2868 cfg->exclusive = lp->exclusive;
2869 if (lp->pre_device >= 0) {
2870 sprintf(cfg->drvid, "%s,%d", dev->drvid[lp->pre_device],
2871 lp->pre_channel);
2872 } else
2873 cfg->drvid[0] = '\0';
2874 cfg->onhtime = lp->onhtime;
2875 cfg->charge = lp->charge;
2876 cfg->l2_proto = lp->l2_proto;
2877 cfg->l3_proto = lp->l3_proto;
2878 cfg->p_encap = lp->p_encap;
2879 cfg->secure = (lp->flags & ISDN_NET_SECURE) ? 1 : 0;
2880 cfg->callback = 0;
2881 if (lp->flags & ISDN_NET_CALLBACK)
2882 cfg->callback = 1;
2883 if (lp->flags & ISDN_NET_CBOUT)
2884 cfg->callback = 2;
2885 cfg->cbhup = (lp->flags & ISDN_NET_CBHUP) ? 1 : 0;
2886 cfg->dialmode = lp->flags & ISDN_NET_DIALMODE_MASK;
2887 cfg->chargehup = (lp->hupflags & 4) ? 1 : 0;
2888 cfg->ihup = (lp->hupflags & 8) ? 1 : 0;
2889 cfg->cbdelay = lp->cbdelay;
2890 cfg->dialmax = lp->dialmax;
2891 cfg->triggercps = lp->triggercps;
2892 cfg->slavedelay = lp->slavedelay / HZ;
2893 cfg->chargeint = (lp->hupflags & ISDN_CHARGEHUP) ?
2894 (lp->chargeint / HZ) : 0;
2895 cfg->pppbind = lp->pppbind;
2896 cfg->dialtimeout = lp->dialtimeout >= 0 ? lp->dialtimeout / HZ : -1;
2897 cfg->dialwait = lp->dialwait / HZ;
2898 if (lp->slave)
2899 strcpy(cfg->slave, ((isdn_net_local *) lp->slave->priv)->name);
2900 else
2901 cfg->slave[0] = '\0';
2902 if (lp->master)
2903 strcpy(cfg->master, ((isdn_net_local *) lp->master->priv)->name);
2904 else
2905 cfg->master[0] = '\0';
2906 return 0;
2907 }
2908 return -ENODEV;
2909}
2910
2911/*
2912 * Add a phone-number to an interface.
2913 */
2914int
2915isdn_net_addphone(isdn_net_ioctl_phone * phone)
2916{
2917 isdn_net_dev *p = isdn_net_findif(phone->name);
2918 isdn_net_phone *n;
2919
2920 if (p) {
5cbded58 2921 if (!(n = kmalloc(sizeof(isdn_net_phone), GFP_KERNEL)))
1da177e4
LT		 2922 return -ENOMEM;
2923 strcpy(n->num, phone->phone);
2924 n->next = p->local->phone[phone->outgoing & 1];
2925 p->local->phone[phone->outgoing & 1] = n;
2926 return 0;
2927 }
2928 return -ENODEV;
2929}
2930
2931/*
2932 * Copy a string of all phone-numbers of an interface to user space.
2933 * This might sleep and must be called with the isdn semaphore down.
2934 */
2935int
2936isdn_net_getphones(isdn_net_ioctl_phone * phone, char __user *phones)
2937{
2938 isdn_net_dev *p = isdn_net_findif(phone->name);
2939 int inout = phone->outgoing & 1;
2940 int more = 0;
2941 int count = 0;
2942 isdn_net_phone *n;
2943
2944 if (!p)
2945 return -ENODEV;
2946 inout &= 1;
2947 for (n = p->local->phone[inout]; n; n = n->next) {
2948 if (more) {
2949 put_user(' ', phones++);
2950 count++;
2951 }
2952 if (copy_to_user(phones, n->num, strlen(n->num) + 1)) {
2953 return -EFAULT;
2954 }
2955 phones += strlen(n->num);
2956 count += strlen(n->num);
2957 more = 1;
2958 }
2959 put_user(0, phones);
2960 count++;
2961 return count;
2962}
2963
2964/*
2965 * Copy a string containing the peer's phone number of a connected interface
2966 * to user space.
2967 */
2968int
2969isdn_net_getpeer(isdn_net_ioctl_phone *phone, isdn_net_ioctl_phone __user *peer)
2970{
2971 isdn_net_dev *p = isdn_net_findif(phone->name);
2972 int ch, dv, idx;
2973
2974 if (!p) return -ENODEV;
2975 /*
2976 * Theoretical race: while this executes, the remote number might
2977 * become invalid (hang up) or change (new connection), resulting
2978 * in (partially) wrong number copied to user. This race
2979 * currently ignored.
2980 */
2981 ch = p->local->isdn_channel;
2982 dv = p->local->isdn_device;
2983 if(ch<0 && dv<0) return -ENOTCONN;
2984 idx = isdn_dc2minor(dv, ch);
2985 if (idx<0) return -ENODEV;
2986 /* for pre-bound channels, we need this extra check */
2987 if ( strncmp(dev->num[idx],"???",3) == 0 ) return -ENOTCONN;
2988 strncpy(phone->phone,dev->num[idx],ISDN_MSNLEN);
2989 phone->outgoing=USG_OUTGOING(dev->usage[idx]);
2990 if ( copy_to_user(peer,phone,sizeof(*peer)) ) return -EFAULT;
2991 return 0;
2992}
2993/*
2994 * Delete a phone-number from an interface.
2995 */
2996int
2997isdn_net_delphone(isdn_net_ioctl_phone * phone)
2998{
2999 isdn_net_dev *p = isdn_net_findif(phone->name);
3000 int inout = phone->outgoing & 1;
3001 isdn_net_phone *n;
3002 isdn_net_phone *m;
3003
3004 if (p) {
3005 n = p->local->phone[inout];
3006 m = NULL;
3007 while (n) {
3008 if (!strcmp(n->num, phone->phone)) {
3009 if (p->local->dial == n)
3010 p->local->dial = n->next;
3011 if (m)
3012 m->next = n->next;
3013 else
3014 p->local->phone[inout] = n->next;
3015 kfree(n);
3016 return 0;
3017 }
3018 m = n;
3019 n = (isdn_net_phone *) n->next;
3020 }
3021 return -EINVAL;
3022 }
3023 return -ENODEV;
3024}
3025
3026/*
3027 * Delete all phone-numbers of an interface.
3028 */
3029static int
3030isdn_net_rmallphone(isdn_net_dev * p)
3031{
3032 isdn_net_phone *n;
3033 isdn_net_phone *m;
3034 int i;
3035
3036 for (i = 0; i < 2; i++) {
3037 n = p->local->phone[i];
3038 while (n) {
3039 m = n->next;
3040 kfree(n);
3041 n = m;
3042 }
3043 p->local->phone[i] = NULL;
3044 }
3045 p->local->dial = NULL;
3046 return 0;
3047}
3048
3049/*
3050 * Force a hangup of a network-interface.
3051 */
3052int
3053isdn_net_force_hangup(char *name)
3054{
3055 isdn_net_dev *p = isdn_net_findif(name);
3056 struct net_device *q;
3057
3058 if (p) {
3059 if (p->local->isdn_device < 0)
3060 return 1;
3061 q = p->local->slave;
3062 /* If this interface has slaves, do a hangup for them also. */
3063 while (q) {
3064 isdn_net_hangup(q);
3065 q = (((isdn_net_local *) q->priv)->slave);
3066 }
3067 isdn_net_hangup(&p->dev);
3068 return 0;
3069 }
3070 return -ENODEV;
3071}
3072
3073/*
3074 * Helper-function for isdn_net_rm: Do the real work.
3075 */
3076static int
3077isdn_net_realrm(isdn_net_dev * p, isdn_net_dev * q)
3078{
3079 u_long flags;
3080
3081 if (isdn_net_device_started(p)) {
3082 return -EBUSY;
3083 }
3084#ifdef CONFIG_ISDN_X25
3085 if( p -> cprot && p -> cprot -> pops )
3086 p -> cprot -> pops -> proto_del ( p -> cprot );
3087#endif
3088 /* Free all phone-entries */
3089 isdn_net_rmallphone(p);
3090 /* If interface is bound exclusive, free channel-usage */
3091 if (p->local->exclusive != -1)
3092 isdn_unexclusive_channel(p->local->pre_device, p->local->pre_channel);
3093 if (p->local->master) {
3094 /* It's a slave-device, so update master's slave-pointer if necessary */
3095 if (((isdn_net_local *) (p->local->master->priv))->slave == &p->dev)
3096 ((isdn_net_local *) (p->local->master->priv))->slave = p->local->slave;
3097 } else {
3098 /* Unregister only if it's a master-device */
1da177e4
LT		 3099 unregister_netdev(&p->dev);
3100 }
3101 /* Unlink device from chain */
3102 spin_lock_irqsave(&dev->lock, flags);
3103 if (q)
3104 q->next = p->next;
3105 else
3106 dev->netdev = p->next;
3107 if (p->local->slave) {
3108 /* If this interface has a slave, remove it also */
3109 char *slavename = ((isdn_net_local *) (p->local->slave->priv))->name;
3110 isdn_net_dev *n = dev->netdev;
3111 q = NULL;
3112 while (n) {
3113 if (!strcmp(n->local->name, slavename)) {
3114 spin_unlock_irqrestore(&dev->lock, flags);
3115 isdn_net_realrm(n, q);
3116 spin_lock_irqsave(&dev->lock, flags);
3117 break;
3118 }
3119 q = n;
3120 n = (isdn_net_dev *) n->next;
3121 }
3122 }
3123 spin_unlock_irqrestore(&dev->lock, flags);
3124 /* If no more net-devices remain, disable auto-hangup timer */
3125 if (dev->netdev == NULL)
3126 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3127 kfree(p->local);
3128 kfree(p);
3129
3130 return 0;
3131}
3132
3133/*
3134 * Remove a single network-interface.
3135 */
3136int
3137isdn_net_rm(char *name)
3138{
3139 u_long flags;
3140 isdn_net_dev *p;
3141 isdn_net_dev *q;
3142
3143 /* Search name in netdev-chain */
3144 spin_lock_irqsave(&dev->lock, flags);
3145 p = dev->netdev;
3146 q = NULL;
3147 while (p) {
3148 if (!strcmp(p->local->name, name)) {
3149 spin_unlock_irqrestore(&dev->lock, flags);
3150 return (isdn_net_realrm(p, q));
3151 }
3152 q = p;
3153 p = (isdn_net_dev *) p->next;
3154 }
3155 spin_unlock_irqrestore(&dev->lock, flags);
3156 /* If no more net-devices remain, disable auto-hangup timer */
3157 if (dev->netdev == NULL)
3158 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3159 return -ENODEV;
3160}
3161
3162/*
3163 * Remove all network-interfaces
3164 */
3165int
3166isdn_net_rmall(void)
3167{
3168 u_long flags;
3169 int ret;
3170
3171 /* Walk through netdev-chain */
3172 spin_lock_irqsave(&dev->lock, flags);
3173 while (dev->netdev) {
3174 if (!dev->netdev->local->master) {
3175 /* Remove master-devices only, slaves get removed with their master */
3176 spin_unlock_irqrestore(&dev->lock, flags);
3177 if ((ret = isdn_net_realrm(dev->netdev, NULL))) {
3178 return ret;
3179 }
3180 spin_lock_irqsave(&dev->lock, flags);
3181 }
3182 }
3183 dev->netdev = NULL;
3184 spin_unlock_irqrestore(&dev->lock, flags);
3185 return 0;
3186}
Linux kernel - Deliverables
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