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[PATCH] fix semaphore handling in __unregister_chrdev_region
[linux/fpc-iii.git] / drivers / isdn / i4l / isdn_net.c
blobe2b790e34510840b3587b0357d7e1f6cb97bcc89
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
25 #include <linux/config.h>
26 #include <linux/isdn.h>
27 #include <net/arp.h>
28 #include <net/dst.h>
29 #include <net/pkt_sched.h>
30 #include <linux/inetdevice.h>
31 #include "isdn_common.h"
32 #include "isdn_net.h"
33 #ifdef CONFIG_ISDN_PPP
34 #include "isdn_ppp.h"
35 #endif
36 #ifdef CONFIG_ISDN_X25
37 #include <linux/concap.h>
38 #include "isdn_concap.h"
39 #endif
40
41
42 /*
43 * Outline of new tbusy handling:
44 *
45 * Old method, roughly spoken, consisted of setting tbusy when entering
46 * isdn_net_start_xmit() and at several other locations and clearing
47 * it from isdn_net_start_xmit() thread when sending was successful.
48 *
49 * With 2.3.x multithreaded network core, to prevent problems, tbusy should
50 * only be set by the isdn_net_start_xmit() thread and only when a tx-busy
51 * condition is detected. Other threads (in particular isdn_net_stat_callb())
52 * are only allowed to clear tbusy.
53 *
54 * -HE
55 */
56
57 /*
58 * About SOFTNET:
59 * Most of the changes were pretty obvious and basically done by HE already.
60 *
61 * One problem of the isdn net device code is that is uses struct net_device
62 * for masters and slaves. However, only master interface are registered to
63 * the network layer, and therefore, it only makes sense to call netif_*
64 * functions on them.
65 *
66 * --KG
67 */
68
69 /*
70 * Find out if the netdevice has been ifup-ed yet.
71 * For slaves, look at the corresponding master.
72 */
73 static __inline__ int isdn_net_device_started(isdn_net_dev *n)
74 {
75 isdn_net_local *lp = n->local;
76 struct net_device *dev;
77
78 if (lp->master)
79 dev = lp->master;
80 else
81 dev = &n->dev;
82 return netif_running(dev);
83 }
84
85 /*
86 * wake up the network -> net_device queue.
87 * For slaves, wake the corresponding master interface.
88 */
89 static __inline__ void isdn_net_device_wake_queue(isdn_net_local *lp)
90 {
91 if (lp->master)
92 netif_wake_queue(lp->master);
93 else
94 netif_wake_queue(&lp->netdev->dev);
95 }
96
97 /*
98 * stop the network -> net_device queue.
99 * For slaves, stop the corresponding master interface.
100 */
101 static __inline__ void isdn_net_device_stop_queue(isdn_net_local *lp)
102 {
103 if (lp->master)
104 netif_stop_queue(lp->master);
105 else
106 netif_stop_queue(&lp->netdev->dev);
107 }
108
109 /*
110 * find out if the net_device which this lp belongs to (lp can be
111 * master or slave) is busy. It's busy iff all (master and slave)
112 * queues are busy
113 */
114 static __inline__ int isdn_net_device_busy(isdn_net_local *lp)
115 {
116 isdn_net_local *nlp;
117 isdn_net_dev *nd;
118 unsigned long flags;
119
120 if (!isdn_net_lp_busy(lp))
121 return 0;
122
123 if (lp->master)
124 nd = ((isdn_net_local *) lp->master->priv)->netdev;
125 else
126 nd = lp->netdev;
127
128 spin_lock_irqsave(&nd->queue_lock, flags);
129 nlp = lp->next;
130 while (nlp != lp) {
131 if (!isdn_net_lp_busy(nlp)) {
132 spin_unlock_irqrestore(&nd->queue_lock, flags);
133 return 0;
134 }
135 nlp = nlp->next;
136 }
137 spin_unlock_irqrestore(&nd->queue_lock, flags);
138 return 1;
139 }
140
141 static __inline__ void isdn_net_inc_frame_cnt(isdn_net_local *lp)
142 {
143 atomic_inc(&lp->frame_cnt);
144 if (isdn_net_device_busy(lp))
145 isdn_net_device_stop_queue(lp);
146 }
147
148 static __inline__ void isdn_net_dec_frame_cnt(isdn_net_local *lp)
149 {
150 atomic_dec(&lp->frame_cnt);
151
152 if (!(isdn_net_device_busy(lp))) {
153 if (!skb_queue_empty(&lp->super_tx_queue)) {
154 schedule_work(&lp->tqueue);
155 } else {
156 isdn_net_device_wake_queue(lp);
157 }
158 }
159 }
160
161 static __inline__ void isdn_net_zero_frame_cnt(isdn_net_local *lp)
162 {
163 atomic_set(&lp->frame_cnt, 0);
164 }
165
166 /* For 2.2.x we leave the transmitter busy timeout at 2 secs, just
167 * to be safe.
168 * For 2.3.x we push it up to 20 secs, because call establishment
169 * (in particular callback) may take such a long time, and we
170 * don't want confusing messages in the log. However, there is a slight
171 * possibility that this large timeout will break other things like MPPP,
172 * which might rely on the tx timeout. If so, we'll find out this way...
173 */
174
175 #define ISDN_NET_TX_TIMEOUT (20*HZ)
176
177 /* Prototypes */
178
179 int isdn_net_force_dial_lp(isdn_net_local *);
180 static int isdn_net_start_xmit(struct sk_buff *, struct net_device *);
181
182 static void isdn_net_ciscohdlck_connected(isdn_net_local *lp);
183 static void isdn_net_ciscohdlck_disconnected(isdn_net_local *lp);
184
185 char *isdn_net_revision = "$Revision: 1.1.2.2 $";
186
187 /*
188 * Code for raw-networking over ISDN
189 */
190
191 static void
192 isdn_net_unreachable(struct net_device *dev, struct sk_buff *skb, char *reason)
193 {
194 if(skb) {
195
196 u_short proto = ntohs(skb->protocol);
197
198 printk(KERN_DEBUG "isdn_net: %s: %s, signalling dst_link_failure %s\n",
199 dev->name,
200 (reason != NULL) ? reason : "unknown",
201 (proto != ETH_P_IP) ? "Protocol != ETH_P_IP" : "");
202
203 dst_link_failure(skb);
204 }
205 else { /* dial not triggered by rawIP packet */
206 printk(KERN_DEBUG "isdn_net: %s: %s\n",
207 dev->name,
208 (reason != NULL) ? reason : "reason unknown");
209 }
210 }
211
212 static void
213 isdn_net_reset(struct net_device *dev)
214 {
215 #ifdef CONFIG_ISDN_X25
216 struct concap_device_ops * dops =
217 ( (isdn_net_local *) dev->priv ) -> dops;
218 struct concap_proto * cprot =
219 ( (isdn_net_local *) dev->priv ) -> netdev -> cprot;
220 #endif
221 #ifdef CONFIG_ISDN_X25
222 if( cprot && cprot -> pops && dops )
223 cprot -> pops -> restart ( cprot, dev, dops );
224 #endif
225 }
226
227 /* Open/initialize the board. */
228 static int
229 isdn_net_open(struct net_device *dev)
230 {
231 int i;
232 struct net_device *p;
233 struct in_device *in_dev;
234
235 /* moved here from isdn_net_reset, because only the master has an
236 interface associated which is supposed to be started. BTW:
237 we need to call netif_start_queue, not netif_wake_queue here */
238 netif_start_queue(dev);
239
240 isdn_net_reset(dev);
241 /* Fill in the MAC-level header (not needed, but for compatibility... */
242 for (i = 0; i < ETH_ALEN - sizeof(u32); i++)
243 dev->dev_addr[i] = 0xfc;
244 if ((in_dev = dev->ip_ptr) != NULL) {
245 /*
246 * Any address will do - we take the first
247 */
248 struct in_ifaddr *ifa = in_dev->ifa_list;
249 if (ifa != NULL)
250 memcpy(dev->dev_addr+2, &ifa->ifa_local, 4);
251 }
252
253 /* If this interface has slaves, start them also */
254
255 if ((p = (((isdn_net_local *) dev->priv)->slave))) {
256 while (p) {
257 isdn_net_reset(p);
258 p = (((isdn_net_local *) p->priv)->slave);
259 }
260 }
261 isdn_lock_drivers();
262 return 0;
263 }
264
265 /*
266 * Assign an ISDN-channel to a net-interface
267 */
268 static void
269 isdn_net_bind_channel(isdn_net_local * lp, int idx)
270 {
271 lp->flags |= ISDN_NET_CONNECTED;
272 lp->isdn_device = dev->drvmap[idx];
273 lp->isdn_channel = dev->chanmap[idx];
274 dev->rx_netdev[idx] = lp->netdev;
275 dev->st_netdev[idx] = lp->netdev;
276 }
277
278 /*
279 * unbind a net-interface (resets interface after an error)
280 */
281 static void
282 isdn_net_unbind_channel(isdn_net_local * lp)
283 {
284 skb_queue_purge(&lp->super_tx_queue);
285
286 if (!lp->master) { /* reset only master device */
287 /* Moral equivalent of dev_purge_queues():
288 BEWARE! This chunk of code cannot be called from hardware
289 interrupt handler. I hope it is true. --ANK
290 */
291 qdisc_reset(lp->netdev->dev.qdisc);
292 }
293 lp->dialstate = 0;
294 dev->rx_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
295 dev->st_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
296 isdn_free_channel(lp->isdn_device, lp->isdn_channel, ISDN_USAGE_NET);
297 lp->flags &= ~ISDN_NET_CONNECTED;
298 lp->isdn_device = -1;
299 lp->isdn_channel = -1;
300 }
301
302 /*
303 * Perform auto-hangup and cps-calculation for net-interfaces.
304 *
305 * auto-hangup:
306 * Increment idle-counter (this counter is reset on any incoming or
307 * outgoing packet), if counter exceeds configured limit either do a
308 * hangup immediately or - if configured - wait until just before the next
309 * charge-info.
310 *
311 * cps-calculation (needed for dynamic channel-bundling):
312 * Since this function is called every second, simply reset the
313 * byte-counter of the interface after copying it to the cps-variable.
314 */
315 unsigned long last_jiffies = -HZ;
316
317 void
318 isdn_net_autohup(void)
319 {
320 isdn_net_dev *p = dev->netdev;
321 int anymore;
322
323 anymore = 0;
324 while (p) {
325 isdn_net_local *l = p->local;
326 if (jiffies == last_jiffies)
327 l->cps = l->transcount;
328 else
329 l->cps = (l->transcount * HZ) / (jiffies - last_jiffies);
330 l->transcount = 0;
331 if (dev->net_verbose > 3)
332 printk(KERN_DEBUG "%s: %d bogocps\n", l->name, l->cps);
333 if ((l->flags & ISDN_NET_CONNECTED) && (!l->dialstate)) {
334 anymore = 1;
335 l->huptimer++;
336 /*
337 * if there is some dialmode where timeout-hangup
338 * should _not_ be done, check for that here
339 */
340 if ((l->onhtime) &&
341 (l->huptimer > l->onhtime))
342 {
343 if (l->hupflags & ISDN_MANCHARGE &&
344 l->hupflags & ISDN_CHARGEHUP) {
345 while (time_after(jiffies, l->chargetime + l->chargeint))
346 l->chargetime += l->chargeint;
347 if (time_after(jiffies, l->chargetime + l->chargeint - 2 * HZ))
348 if (l->outgoing || l->hupflags & ISDN_INHUP)
349 isdn_net_hangup(&p->dev);
350 } else if (l->outgoing) {
351 if (l->hupflags & ISDN_CHARGEHUP) {
352 if (l->hupflags & ISDN_WAITCHARGE) {
353 printk(KERN_DEBUG "isdn_net: Hupflags of %s are %X\n",
354 l->name, l->hupflags);
355 isdn_net_hangup(&p->dev);
356 } else if (time_after(jiffies, l->chargetime + l->chargeint)) {
357 printk(KERN_DEBUG
358 "isdn_net: %s: chtime = %lu, chint = %d\n",
359 l->name, l->chargetime, l->chargeint);
360 isdn_net_hangup(&p->dev);
361 }
362 } else
363 isdn_net_hangup(&p->dev);
364 } else if (l->hupflags & ISDN_INHUP)
365 isdn_net_hangup(&p->dev);
366 }
367
368 if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*l) == ISDN_NET_DM_OFF)) {
369 isdn_net_hangup(&p->dev);
370 break;
371 }
372 }
373 p = (isdn_net_dev *) p->next;
374 }
375 last_jiffies = jiffies;
376 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, anymore);
377 }
378
379 static void isdn_net_lp_disconnected(isdn_net_local *lp)
380 {
381 isdn_net_rm_from_bundle(lp);
382 }
383
384 /*
385 * Handle status-messages from ISDN-interfacecard.
386 * This function is called from within the main-status-dispatcher
387 * isdn_status_callback, which itself is called from the low-level driver.
388 * Return: 1 = Event handled, 0 = not for us or unknown Event.
389 */
390 int
391 isdn_net_stat_callback(int idx, isdn_ctrl *c)
392 {
393 isdn_net_dev *p = dev->st_netdev[idx];
394 int cmd = c->command;
395
396 if (p) {
397 isdn_net_local *lp = p->local;
398 #ifdef CONFIG_ISDN_X25
399 struct concap_proto *cprot = lp->netdev->cprot;
400 struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
401 #endif
402 switch (cmd) {
403 case ISDN_STAT_BSENT:
404 /* A packet has successfully been sent out */
405 if ((lp->flags & ISDN_NET_CONNECTED) &&
406 (!lp->dialstate)) {
407 isdn_net_dec_frame_cnt(lp);
408 lp->stats.tx_packets++;
409 lp->stats.tx_bytes += c->parm.length;
410 }
411 return 1;
412 case ISDN_STAT_DCONN:
413 /* D-Channel is up */
414 switch (lp->dialstate) {
415 case 4:
416 case 7:
417 case 8:
418 lp->dialstate++;
419 return 1;
420 case 12:
421 lp->dialstate = 5;
422 return 1;
423 }
424 break;
425 case ISDN_STAT_DHUP:
426 /* Either D-Channel-hangup or error during dialout */
427 #ifdef CONFIG_ISDN_X25
428 /* If we are not connencted then dialing had
429 failed. If there are generic encap protocol
430 receiver routines signal the closure of
431 the link*/
432
433 if( !(lp->flags & ISDN_NET_CONNECTED)
434 && pops && pops -> disconn_ind )
435 pops -> disconn_ind(cprot);
436 #endif /* CONFIG_ISDN_X25 */
437 if ((!lp->dialstate) && (lp->flags & ISDN_NET_CONNECTED)) {
438 if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
439 isdn_net_ciscohdlck_disconnected(lp);
440 #ifdef CONFIG_ISDN_PPP
441 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
442 isdn_ppp_free(lp);
443 #endif
444 isdn_net_lp_disconnected(lp);
445 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
446 printk(KERN_INFO "%s: remote hangup\n", lp->name);
447 printk(KERN_INFO "%s: Chargesum is %d\n", lp->name,
448 lp->charge);
449 isdn_net_unbind_channel(lp);
450 return 1;
451 }
452 break;
453 #ifdef CONFIG_ISDN_X25
454 case ISDN_STAT_BHUP:
455 /* B-Channel-hangup */
456 /* try if there are generic encap protocol
457 receiver routines and signal the closure of
458 the link */
459 if( pops && pops -> disconn_ind ){
460 pops -> disconn_ind(cprot);
461 return 1;
462 }
463 break;
464 #endif /* CONFIG_ISDN_X25 */
465 case ISDN_STAT_BCONN:
466 /* B-Channel is up */
467 isdn_net_zero_frame_cnt(lp);
468 switch (lp->dialstate) {
469 case 5:
470 case 6:
471 case 7:
472 case 8:
473 case 9:
474 case 10:
475 case 12:
476 if (lp->dialstate <= 6) {
477 dev->usage[idx] |= ISDN_USAGE_OUTGOING;
478 isdn_info_update();
479 } else
480 dev->rx_netdev[idx] = p;
481 lp->dialstate = 0;
482 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 1);
483 if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
484 isdn_net_ciscohdlck_connected(lp);
485 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP) {
486 if (lp->master) { /* is lp a slave? */
487 isdn_net_dev *nd = ((isdn_net_local *)lp->master->priv)->netdev;
488 isdn_net_add_to_bundle(nd, lp);
489 }
490 }
491 printk(KERN_INFO "isdn_net: %s connected\n", lp->name);
492 /* If first Chargeinfo comes before B-Channel connect,
493 * we correct the timestamp here.
494 */
495 lp->chargetime = jiffies;
496
497 /* reset dial-timeout */
498 lp->dialstarted = 0;
499 lp->dialwait_timer = 0;
500
501 #ifdef CONFIG_ISDN_PPP
502 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
503 isdn_ppp_wakeup_daemon(lp);
504 #endif
505 #ifdef CONFIG_ISDN_X25
506 /* try if there are generic concap receiver routines */
507 if( pops )
508 if( pops->connect_ind)
509 pops->connect_ind(cprot);
510 #endif /* CONFIG_ISDN_X25 */
511 /* ppp needs to do negotiations first */
512 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP)
513 isdn_net_device_wake_queue(lp);
514 return 1;
515 }
516 break;
517 case ISDN_STAT_NODCH:
518 /* No D-Channel avail. */
519 if (lp->dialstate == 4) {
520 lp->dialstate--;
521 return 1;
522 }
523 break;
524 case ISDN_STAT_CINF:
525 /* Charge-info from TelCo. Calculate interval between
526 * charge-infos and set timestamp for last info for
527 * usage by isdn_net_autohup()
528 */
529 lp->charge++;
530 if (lp->hupflags & ISDN_HAVECHARGE) {
531 lp->hupflags &= ~ISDN_WAITCHARGE;
532 lp->chargeint = jiffies - lp->chargetime - (2 * HZ);
533 }
534 if (lp->hupflags & ISDN_WAITCHARGE)
535 lp->hupflags |= ISDN_HAVECHARGE;
536 lp->chargetime = jiffies;
537 printk(KERN_DEBUG "isdn_net: Got CINF chargetime of %s now %lu\n",
538 lp->name, lp->chargetime);
539 return 1;
540 }
541 }
542 return 0;
543 }
544
545 /*
546 * Perform dialout for net-interfaces and timeout-handling for
547 * D-Channel-up and B-Channel-up Messages.
548 * This function is initially called from within isdn_net_start_xmit() or
549 * or isdn_net_find_icall() after initializing the dialstate for an
550 * interface. If further calls are needed, the function schedules itself
551 * for a timer-callback via isdn_timer_function().
552 * The dialstate is also affected by incoming status-messages from
553 * the ISDN-Channel which are handled in isdn_net_stat_callback() above.
554 */
555 void
556 isdn_net_dial(void)
557 {
558 isdn_net_dev *p = dev->netdev;
559 int anymore = 0;
560 int i;
561 isdn_ctrl cmd;
562 u_char *phone_number;
563
564 while (p) {
565 isdn_net_local *lp = p->local;
566
567 #ifdef ISDN_DEBUG_NET_DIAL
568 if (lp->dialstate)
569 printk(KERN_DEBUG "%s: dialstate=%d\n", lp->name, lp->dialstate);
570 #endif
571 switch (lp->dialstate) {
572 case 0:
573 /* Nothing to do for this interface */
574 break;
575 case 1:
576 /* Initiate dialout. Set phone-number-pointer to first number
577 * of interface.
578 */
579 lp->dial = lp->phone[1];
580 if (!lp->dial) {
581 printk(KERN_WARNING "%s: phone number deleted?\n",
582 lp->name);
583 isdn_net_hangup(&p->dev);
584 break;
585 }
586 anymore = 1;
587
588 if(lp->dialtimeout > 0)
589 if(lp->dialstarted == 0 || time_after(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait)) {
590 lp->dialstarted = jiffies;
591 lp->dialwait_timer = 0;
592 }
593
594 lp->dialstate++;
595 /* Fall through */
596 case 2:
597 /* Prepare dialing. Clear EAZ, then set EAZ. */
598 cmd.driver = lp->isdn_device;
599 cmd.arg = lp->isdn_channel;
600 cmd.command = ISDN_CMD_CLREAZ;
601 isdn_command(&cmd);
602 sprintf(cmd.parm.num, "%s", isdn_map_eaz2msn(lp->msn, cmd.driver));
603 cmd.command = ISDN_CMD_SETEAZ;
604 isdn_command(&cmd);
605 lp->dialretry = 0;
606 anymore = 1;
607 lp->dialstate++;
608 /* Fall through */
609 case 3:
610 /* Setup interface, dial current phone-number, switch to next number.
611 * If list of phone-numbers is exhausted, increment
612 * retry-counter.
613 */
614 if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF)) {
615 char *s;
616 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
617 s = "dial suppressed: isdn system stopped";
618 else
619 s = "dial suppressed: dialmode `off'";
620 isdn_net_unreachable(&p->dev, NULL, s);
621 isdn_net_hangup(&p->dev);
622 break;
623 }
624 cmd.driver = lp->isdn_device;
625 cmd.command = ISDN_CMD_SETL2;
626 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
627 isdn_command(&cmd);
628 cmd.driver = lp->isdn_device;
629 cmd.command = ISDN_CMD_SETL3;
630 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
631 isdn_command(&cmd);
632 cmd.driver = lp->isdn_device;
633 cmd.arg = lp->isdn_channel;
634 if (!lp->dial) {
635 printk(KERN_WARNING "%s: phone number deleted?\n",
636 lp->name);
637 isdn_net_hangup(&p->dev);
638 break;
639 }
640 if (!strncmp(lp->dial->num, "LEASED", strlen("LEASED"))) {
641 lp->dialstate = 4;
642 printk(KERN_INFO "%s: Open leased line ...\n", lp->name);
643 } else {
644 if(lp->dialtimeout > 0)
645 if (time_after(jiffies, lp->dialstarted + lp->dialtimeout)) {
646 lp->dialwait_timer = jiffies + lp->dialwait;
647 lp->dialstarted = 0;
648 isdn_net_unreachable(&p->dev, NULL, "dial: timed out");
649 isdn_net_hangup(&p->dev);
650 break;
651 }
652
653 cmd.driver = lp->isdn_device;
654 cmd.command = ISDN_CMD_DIAL;
655 cmd.parm.setup.si2 = 0;
656
657 /* check for DOV */
658 phone_number = lp->dial->num;
659 if ((*phone_number == 'v') ||
660 (*phone_number == 'V')) { /* DOV call */
661 cmd.parm.setup.si1 = 1;
662 } else { /* DATA call */
663 cmd.parm.setup.si1 = 7;
664 }
665
666 strcpy(cmd.parm.setup.phone, phone_number);
667 /*
668 * Switch to next number or back to start if at end of list.
669 */
670 if (!(lp->dial = (isdn_net_phone *) lp->dial->next)) {
671 lp->dial = lp->phone[1];
672 lp->dialretry++;
673
674 if (lp->dialretry > lp->dialmax) {
675 if (lp->dialtimeout == 0) {
676 lp->dialwait_timer = jiffies + lp->dialwait;
677 lp->dialstarted = 0;
678 isdn_net_unreachable(&p->dev, NULL, "dial: tried all numbers dialmax times");
679 }
680 isdn_net_hangup(&p->dev);
681 break;
682 }
683 }
684 sprintf(cmd.parm.setup.eazmsn, "%s",
685 isdn_map_eaz2msn(lp->msn, cmd.driver));
686 i = isdn_dc2minor(lp->isdn_device, lp->isdn_channel);
687 if (i >= 0) {
688 strcpy(dev->num[i], cmd.parm.setup.phone);
689 dev->usage[i] |= ISDN_USAGE_OUTGOING;
690 isdn_info_update();
691 }
692 printk(KERN_INFO "%s: dialing %d %s... %s\n", lp->name,
693 lp->dialretry, cmd.parm.setup.phone,
694 (cmd.parm.setup.si1 == 1) ? "DOV" : "");
695 lp->dtimer = 0;
696 #ifdef ISDN_DEBUG_NET_DIAL
697 printk(KERN_DEBUG "dial: d=%d c=%d\n", lp->isdn_device,
698 lp->isdn_channel);
699 #endif
700 isdn_command(&cmd);
701 }
702 lp->huptimer = 0;
703 lp->outgoing = 1;
704 if (lp->chargeint) {
705 lp->hupflags |= ISDN_HAVECHARGE;
706 lp->hupflags &= ~ISDN_WAITCHARGE;
707 } else {
708 lp->hupflags |= ISDN_WAITCHARGE;
709 lp->hupflags &= ~ISDN_HAVECHARGE;
710 }
711 anymore = 1;
712 lp->dialstate =
713 (lp->cbdelay &&
714 (lp->flags & ISDN_NET_CBOUT)) ? 12 : 4;
715 break;
716 case 4:
717 /* Wait for D-Channel-connect.
718 * If timeout, switch back to state 3.
719 * Dialmax-handling moved to state 3.
720 */
721 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
722 lp->dialstate = 3;
723 anymore = 1;
724 break;
725 case 5:
726 /* Got D-Channel-Connect, send B-Channel-request */
727 cmd.driver = lp->isdn_device;
728 cmd.arg = lp->isdn_channel;
729 cmd.command = ISDN_CMD_ACCEPTB;
730 anymore = 1;
731 lp->dtimer = 0;
732 lp->dialstate++;
733 isdn_command(&cmd);
734 break;
735 case 6:
736 /* Wait for B- or D-Channel-connect. If timeout,
737 * switch back to state 3.
738 */
739 #ifdef ISDN_DEBUG_NET_DIAL
740 printk(KERN_DEBUG "dialtimer2: %d\n", lp->dtimer);
741 #endif
742 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
743 lp->dialstate = 3;
744 anymore = 1;
745 break;
746 case 7:
747 /* Got incoming Call, setup L2 and L3 protocols,
748 * then wait for D-Channel-connect
749 */
750 #ifdef ISDN_DEBUG_NET_DIAL
751 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
752 #endif
753 cmd.driver = lp->isdn_device;
754 cmd.command = ISDN_CMD_SETL2;
755 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
756 isdn_command(&cmd);
757 cmd.driver = lp->isdn_device;
758 cmd.command = ISDN_CMD_SETL3;
759 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
760 isdn_command(&cmd);
761 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT15)
762 isdn_net_hangup(&p->dev);
763 else {
764 anymore = 1;
765 lp->dialstate++;
766 }
767 break;
768 case 9:
769 /* Got incoming D-Channel-Connect, send B-Channel-request */
770 cmd.driver = lp->isdn_device;
771 cmd.arg = lp->isdn_channel;
772 cmd.command = ISDN_CMD_ACCEPTB;
773 isdn_command(&cmd);
774 anymore = 1;
775 lp->dtimer = 0;
776 lp->dialstate++;
777 break;
778 case 8:
779 case 10:
780 /* Wait for B- or D-channel-connect */
781 #ifdef ISDN_DEBUG_NET_DIAL
782 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
783 #endif
784 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
785 isdn_net_hangup(&p->dev);
786 else
787 anymore = 1;
788 break;
789 case 11:
790 /* Callback Delay */
791 if (lp->dtimer++ > lp->cbdelay)
792 lp->dialstate = 1;
793 anymore = 1;
794 break;
795 case 12:
796 /* Remote does callback. Hangup after cbdelay, then wait for incoming
797 * call (in state 4).
798 */
799 if (lp->dtimer++ > lp->cbdelay)
800 {
801 printk(KERN_INFO "%s: hangup waiting for callback ...\n", lp->name);
802 lp->dtimer = 0;
803 lp->dialstate = 4;
804 cmd.driver = lp->isdn_device;
805 cmd.command = ISDN_CMD_HANGUP;
806 cmd.arg = lp->isdn_channel;
807 isdn_command(&cmd);
808 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
809 }
810 anymore = 1;
811 break;
812 default:
813 printk(KERN_WARNING "isdn_net: Illegal dialstate %d for device %s\n",
814 lp->dialstate, lp->name);
815 }
816 p = (isdn_net_dev *) p->next;
817 }
818 isdn_timer_ctrl(ISDN_TIMER_NETDIAL, anymore);
819 }
820
821 /*
822 * Perform hangup for a net-interface.
823 */
824 void
825 isdn_net_hangup(struct net_device *d)
826 {
827 isdn_net_local *lp = (isdn_net_local *) d->priv;
828 isdn_ctrl cmd;
829 #ifdef CONFIG_ISDN_X25
830 struct concap_proto *cprot = lp->netdev->cprot;
831 struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
832 #endif
833
834 if (lp->flags & ISDN_NET_CONNECTED) {
835 if (lp->slave != NULL) {
836 isdn_net_local *slp = (isdn_net_local *)lp->slave->priv;
837 if (slp->flags & ISDN_NET_CONNECTED) {
838 printk(KERN_INFO
839 "isdn_net: hang up slave %s before %s\n",
840 slp->name, lp->name);
841 isdn_net_hangup(lp->slave);
842 }
843 }
844 printk(KERN_INFO "isdn_net: local hangup %s\n", lp->name);
845 #ifdef CONFIG_ISDN_PPP
846 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
847 isdn_ppp_free(lp);
848 #endif
849 isdn_net_lp_disconnected(lp);
850 #ifdef CONFIG_ISDN_X25
851 /* try if there are generic encap protocol
852 receiver routines and signal the closure of
853 the link */
854 if( pops && pops -> disconn_ind )
855 pops -> disconn_ind(cprot);
856 #endif /* CONFIG_ISDN_X25 */
857
858 cmd.driver = lp->isdn_device;
859 cmd.command = ISDN_CMD_HANGUP;
860 cmd.arg = lp->isdn_channel;
861 isdn_command(&cmd);
862 printk(KERN_INFO "%s: Chargesum is %d\n", lp->name, lp->charge);
863 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
864 }
865 isdn_net_unbind_channel(lp);
866 }
867
868 typedef struct {
869 unsigned short source;
870 unsigned short dest;
871 } ip_ports;
872
873 static void
874 isdn_net_log_skb(struct sk_buff * skb, isdn_net_local * lp)
875 {
876 u_char *p = skb->nh.raw; /* hopefully, this was set correctly */
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() */
884 if (skb->nh.raw < skb->data || skb->nh.raw >= skb->tail) {
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 */
966 void 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 */
988 static void isdn_net_softint(void *private)
989 {
990 isdn_net_local *lp = private;
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 */
1007 void 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
1052 static int
1053 isdn_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
1118 static void
1119 isdn_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) {
1125 int pullsize = (ulong)skb->nh.raw - (ulong)skb->data - ETH_HLEN;
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
1134 void isdn_net_tx_timeout(struct net_device * ndev)
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 */
1167 static int
1168 isdn_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 */
1313 static int
1314 isdn_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 */
1348 static struct net_device_stats *
1349 isdn_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
1364 static unsigned short
1365 isdn_net_type_trans(struct sk_buff *skb, struct net_device *dev)
1366 {
1367 struct ethhdr *eth;
1368 unsigned char *rawp;
1369
1370 skb->mac.raw = skb->data;
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 */
1412 static struct sk_buff*
1413 isdn_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 */
1427 int
1428 isdn_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 */
1494 static void
1495 isdn_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
1559 static void
1560 isdn_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
1585 static void
1586 isdn_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
1606 static void
1607 isdn_net_ciscohdlck_disconnected(isdn_net_local *lp)
1608 {
1609 del_timer(&lp->cisco_timer);
1610 }
1611
1612 static void
1613 isdn_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;
1618 u32 addr = 0; /* local ipv4 address */
1619 u32 mask = 0; /* local netmask */
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
1651 static void
1652 isdn_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
1716 static void
1717 isdn_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 */
1767 static void
1768 isdn_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;
1789 skb->input_dev = ndev;
1790 skb->pkt_type = PACKET_HOST;
1791 skb->mac.raw = skb->data;
1792 #ifdef ISDN_DEBUG_NET_DUMP
1793 isdn_dumppkt("R:", skb->data, skb->len, 40);
1794 #endif
1795 switch (lp->p_encap) {
1796 case ISDN_NET_ENCAP_ETHER:
1797 /* Ethernet over ISDN */
1798 olp->huptimer = 0;
1799 lp->huptimer = 0;
1800 skb->protocol = isdn_net_type_trans(skb, ndev);
1801 break;
1802 case ISDN_NET_ENCAP_UIHDLC:
1803 /* HDLC with UI-frame (for ispa with -h1 option) */
1804 olp->huptimer = 0;
1805 lp->huptimer = 0;
1806 skb_pull(skb, 2);
1807 /* Fall through */
1808 case ISDN_NET_ENCAP_RAWIP:
1809 /* RAW-IP without MAC-Header */
1810 olp->huptimer = 0;
1811 lp->huptimer = 0;
1812 skb->protocol = htons(ETH_P_IP);
1813 break;
1814 case ISDN_NET_ENCAP_CISCOHDLCK:
1815 isdn_net_ciscohdlck_receive(lp, skb);
1816 return;
1817 case ISDN_NET_ENCAP_CISCOHDLC:
1818 /* CISCO-HDLC IP with type field and fake I-frame-header */
1819 skb_pull(skb, 2);
1820 /* Fall through */
1821 case ISDN_NET_ENCAP_IPTYP:
1822 /* IP with type field */
1823 olp->huptimer = 0;
1824 lp->huptimer = 0;
1825 skb->protocol = *(unsigned short *) &(skb->data[0]);
1826 skb_pull(skb, 2);
1827 if (*(unsigned short *) skb->data == 0xFFFF)
1828 skb->protocol = htons(ETH_P_802_3);
1829 break;
1830 #ifdef CONFIG_ISDN_PPP
1831 case ISDN_NET_ENCAP_SYNCPPP:
1832 /* huptimer is done in isdn_ppp_push_higher */
1833 isdn_ppp_receive(lp->netdev, olp, skb);
1834 return;
1835 #endif
1836
1837 default:
1838 #ifdef CONFIG_ISDN_X25
1839 /* try if there are generic sync_device receiver routines */
1840 if(cprot) if(cprot -> pops)
1841 if( cprot -> pops -> data_ind){
1842 cprot -> pops -> data_ind(cprot,skb);
1843 return;
1844 };
1845 #endif /* CONFIG_ISDN_X25 */
1846 printk(KERN_WARNING "%s: unknown encapsulation, dropping\n",
1847 lp->name);
1848 kfree_skb(skb);
1849 return;
1850 }
1851
1852 netif_rx(skb);
1853 return;
1854 }
1855
1856 /*
1857 * A packet arrived via ISDN. Search interface-chain for a corresponding
1858 * interface. If found, deliver packet to receiver-function and return 1,
1859 * else return 0.
1860 */
1861 int
1862 isdn_net_rcv_skb(int idx, struct sk_buff *skb)
1863 {
1864 isdn_net_dev *p = dev->rx_netdev[idx];
1865
1866 if (p) {
1867 isdn_net_local *lp = p->local;
1868 if ((lp->flags & ISDN_NET_CONNECTED) &&
1869 (!lp->dialstate)) {
1870 isdn_net_receive(&p->dev, skb);
1871 return 1;
1872 }
1873 }
1874 return 0;
1875 }
1876
1877 static int
1878 my_eth_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
1879 void *daddr, void *saddr, unsigned len)
1880 {
1881 struct ethhdr *eth = (struct ethhdr *) skb_push(skb, ETH_HLEN);
1882
1883 /*
1884 * Set the protocol type. For a packet of type ETH_P_802_3 we
1885 * put the length here instead. It is up to the 802.2 layer to
1886 * carry protocol information.
1887 */
1888
1889 if (type != ETH_P_802_3)
1890 eth->h_proto = htons(type);
1891 else
1892 eth->h_proto = htons(len);
1893
1894 /*
1895 * Set the source hardware address.
1896 */
1897 if (saddr)
1898 memcpy(eth->h_source, saddr, dev->addr_len);
1899 else
1900 memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
1901
1902 /*
1903 * Anyway, the loopback-device should never use this function...
1904 */
1905
1906 if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
1907 memset(eth->h_dest, 0, dev->addr_len);
1908 return ETH_HLEN /*(dev->hard_header_len)*/;
1909 }
1910 if (daddr) {
1911 memcpy(eth->h_dest, daddr, dev->addr_len);
1912 return ETH_HLEN /*dev->hard_header_len*/;
1913 }
1914 return -ETH_HLEN /*dev->hard_header_len*/;
1915 }
1916
1917 /*
1918 * build an header
1919 * depends on encaps that is being used.
1920 */
1921
1922 static int
1923 isdn_net_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
1924 void *daddr, void *saddr, unsigned plen)
1925 {
1926 isdn_net_local *lp = dev->priv;
1927 unsigned char *p;
1928 ushort len = 0;
1929
1930 switch (lp->p_encap) {
1931 case ISDN_NET_ENCAP_ETHER:
1932 len = my_eth_header(skb, dev, type, daddr, saddr, plen);
1933 break;
1934 #ifdef CONFIG_ISDN_PPP
1935 case ISDN_NET_ENCAP_SYNCPPP:
1936 /* stick on a fake header to keep fragmentation code happy. */
1937 len = IPPP_MAX_HEADER;
1938 skb_push(skb,len);
1939 break;
1940 #endif
1941 case ISDN_NET_ENCAP_RAWIP:
1942 printk(KERN_WARNING "isdn_net_header called with RAW_IP!\n");
1943 len = 0;
1944 break;
1945 case ISDN_NET_ENCAP_IPTYP:
1946 /* ethernet type field */
1947 *((ushort *) skb_push(skb, 2)) = htons(type);
1948 len = 2;
1949 break;
1950 case ISDN_NET_ENCAP_UIHDLC:
1951 /* HDLC with UI-Frames (for ispa with -h1 option) */
1952 *((ushort *) skb_push(skb, 2)) = htons(0x0103);
1953 len = 2;
1954 break;
1955 case ISDN_NET_ENCAP_CISCOHDLC:
1956 case ISDN_NET_ENCAP_CISCOHDLCK:
1957 p = skb_push(skb, 4);
1958 p += put_u8 (p, CISCO_ADDR_UNICAST);
1959 p += put_u8 (p, CISCO_CTRL);
1960 p += put_u16(p, type);
1961 len = 4;
1962 break;
1963 #ifdef CONFIG_ISDN_X25
1964 default:
1965 /* try if there are generic concap protocol routines */
1966 if( lp-> netdev -> cprot ){
1967 printk(KERN_WARNING "isdn_net_header called with concap_proto!\n");
1968 len = 0;
1969 break;
1970 }
1971 break;
1972 #endif /* CONFIG_ISDN_X25 */
1973 }
1974 return len;
1975 }
1976
1977 /* We don't need to send arp, because we have point-to-point connections. */
1978 static int
1979 isdn_net_rebuild_header(struct sk_buff *skb)
1980 {
1981 struct net_device *dev = skb->dev;
1982 isdn_net_local *lp = dev->priv;
1983 int ret = 0;
1984
1985 if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
1986 struct ethhdr *eth = (struct ethhdr *) skb->data;
1987
1988 /*
1989 * Only ARP/IP is currently supported
1990 */
1991
1992 if (eth->h_proto != htons(ETH_P_IP)) {
1993 printk(KERN_WARNING
1994 "isdn_net: %s don't know how to resolve type %d addresses?\n",
1995 dev->name, (int) eth->h_proto);
1996 memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
1997 return 0;
1998 }
1999 /*
2000 * Try to get ARP to resolve the header.
2001 */
2002 #ifdef CONFIG_INET
2003 ret = arp_find(eth->h_dest, skb);
2004 #endif
2005 }
2006 return ret;
2007 }
2008
2009 /*
2010 * Interface-setup. (just after registering a new interface)
2011 */
2012 static int
2013 isdn_net_init(struct net_device *ndev)
2014 {
2015 ushort max_hlhdr_len = 0;
2016 isdn_net_local *lp = (isdn_net_local *) ndev->priv;
2017 int drvidx, i;
2018
2019 ether_setup(ndev);
2020 lp->org_hhc = ndev->hard_header_cache;
2021 lp->org_hcu = ndev->header_cache_update;
2022
2023 /* Setup the generic properties */
2024
2025 ndev->hard_header = NULL;
2026 ndev->hard_header_cache = NULL;
2027 ndev->header_cache_update = NULL;
2028 ndev->mtu = 1500;
2029 ndev->flags = IFF_NOARP|IFF_POINTOPOINT;
2030 ndev->type = ARPHRD_ETHER;
2031 ndev->addr_len = ETH_ALEN;
2032
2033 /* for clients with MPPP maybe higher values better */
2034 ndev->tx_queue_len = 30;
2035
2036 for (i = 0; i < ETH_ALEN; i++)
2037 ndev->broadcast[i] = 0xff;
2038
2039 /* The ISDN-specific entries in the device structure. */
2040 ndev->open = &isdn_net_open;
2041 ndev->hard_start_xmit = &isdn_net_start_xmit;
2042
2043 /*
2044 * up till binding we ask the protocol layer to reserve as much
2045 * as we might need for HL layer
2046 */
2047
2048 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2049 if (dev->drv[drvidx])
2050 if (max_hlhdr_len < dev->drv[drvidx]->interface->hl_hdrlen)
2051 max_hlhdr_len = dev->drv[drvidx]->interface->hl_hdrlen;
2052
2053 ndev->hard_header_len = ETH_HLEN + max_hlhdr_len;
2054 ndev->stop = &isdn_net_close;
2055 ndev->get_stats = &isdn_net_get_stats;
2056 ndev->rebuild_header = &isdn_net_rebuild_header;
2057 ndev->do_ioctl = NULL;
2058 return 0;
2059 }
2060
2061 static void
2062 isdn_net_swapbind(int drvidx)
2063 {
2064 isdn_net_dev *p;
2065
2066 #ifdef ISDN_DEBUG_NET_ICALL
2067 printk(KERN_DEBUG "n_fi: swapping ch of %d\n", drvidx);
2068 #endif
2069 p = dev->netdev;
2070 while (p) {
2071 if (p->local->pre_device == drvidx)
2072 switch (p->local->pre_channel) {
2073 case 0:
2074 p->local->pre_channel = 1;
2075 break;
2076 case 1:
2077 p->local->pre_channel = 0;
2078 break;
2079 }
2080 p = (isdn_net_dev *) p->next;
2081 }
2082 }
2083
2084 static void
2085 isdn_net_swap_usage(int i1, int i2)
2086 {
2087 int u1 = dev->usage[i1] & ISDN_USAGE_EXCLUSIVE;
2088 int u2 = dev->usage[i2] & ISDN_USAGE_EXCLUSIVE;
2089
2090 #ifdef ISDN_DEBUG_NET_ICALL
2091 printk(KERN_DEBUG "n_fi: usage of %d and %d\n", i1, i2);
2092 #endif
2093 dev->usage[i1] &= ~ISDN_USAGE_EXCLUSIVE;
2094 dev->usage[i1] |= u2;
2095 dev->usage[i2] &= ~ISDN_USAGE_EXCLUSIVE;
2096 dev->usage[i2] |= u1;
2097 isdn_info_update();
2098 }
2099
2100 /*
2101 * An incoming call-request has arrived.
2102 * Search the interface-chain for an appropriate interface.
2103 * If found, connect the interface to the ISDN-channel and initiate
2104 * D- and B-Channel-setup. If secure-flag is set, accept only
2105 * configured phone-numbers. If callback-flag is set, initiate
2106 * callback-dialing.
2107 *
2108 * Return-Value: 0 = No appropriate interface for this call.
2109 * 1 = Call accepted
2110 * 2 = Reject call, wait cbdelay, then call back
2111 * 3 = Reject call
2112 * 4 = Wait cbdelay, then call back
2113 * 5 = No appropriate interface for this call,
2114 * would eventually match if CID was longer.
2115 */
2116
2117 int
2118 isdn_net_find_icall(int di, int ch, int idx, setup_parm *setup)
2119 {
2120 char *eaz;
2121 int si1;
2122 int si2;
2123 int ematch;
2124 int wret;
2125 int swapped;
2126 int sidx = 0;
2127 u_long flags;
2128 isdn_net_dev *p;
2129 isdn_net_phone *n;
2130 char nr[32];
2131 char *my_eaz;
2132
2133 /* Search name in netdev-chain */
2134 if (!setup->phone[0]) {
2135 nr[0] = '0';
2136 nr[1] = '\0';
2137 printk(KERN_INFO "isdn_net: Incoming call without OAD, assuming '0'\n");
2138 } else
2139 strcpy(nr, setup->phone);
2140 si1 = (int) setup->si1;
2141 si2 = (int) setup->si2;
2142 if (!setup->eazmsn[0]) {
2143 printk(KERN_WARNING "isdn_net: Incoming call without CPN, assuming '0'\n");
2144 eaz = "0";
2145 } else
2146 eaz = setup->eazmsn;
2147 if (dev->net_verbose > 1)
2148 printk(KERN_INFO "isdn_net: call from %s,%d,%d -> %s\n", nr, si1, si2, eaz);
2149 /* Accept DATA and VOICE calls at this stage
2150 * local eaz is checked later for allowed call types
2151 */
2152 if ((si1 != 7) && (si1 != 1)) {
2153 if (dev->net_verbose > 1)
2154 printk(KERN_INFO "isdn_net: Service-Indicator not 1 or 7, ignored\n");
2155 return 0;
2156 }
2157 n = (isdn_net_phone *) 0;
2158 p = dev->netdev;
2159 ematch = wret = swapped = 0;
2160 #ifdef ISDN_DEBUG_NET_ICALL
2161 printk(KERN_DEBUG "n_fi: di=%d ch=%d idx=%d usg=%d\n", di, ch, idx,
2162 dev->usage[idx]);
2163 #endif
2164 while (p) {
2165 int matchret;
2166 isdn_net_local *lp = p->local;
2167
2168 /* If last check has triggered as binding-swap, revert it */
2169 switch (swapped) {
2170 case 2:
2171 isdn_net_swap_usage(idx, sidx);
2172 /* fall through */
2173 case 1:
2174 isdn_net_swapbind(di);
2175 break;
2176 }
2177 swapped = 0;
2178 /* check acceptable call types for DOV */
2179 my_eaz = isdn_map_eaz2msn(lp->msn, di);
2180 if (si1 == 1) { /* it's a DOV call, check if we allow it */
2181 if (*my_eaz == 'v' || *my_eaz == 'V' ||
2182 *my_eaz == 'b' || *my_eaz == 'B')
2183 my_eaz++; /* skip to allow a match */
2184 else
2185 my_eaz = NULL; /* force non match */
2186 } else { /* it's a DATA call, check if we allow it */
2187 if (*my_eaz == 'b' || *my_eaz == 'B')
2188 my_eaz++; /* skip to allow a match */
2189 }
2190 if (my_eaz)
2191 matchret = isdn_msncmp(eaz, my_eaz);
2192 else
2193 matchret = 1;
2194 if (!matchret)
2195 ematch = 1;
2196
2197 /* Remember if more numbers eventually can match */
2198 if (matchret > wret)
2199 wret = matchret;
2200 #ifdef ISDN_DEBUG_NET_ICALL
2201 printk(KERN_DEBUG "n_fi: if='%s', l.msn=%s, l.flags=%d, l.dstate=%d\n",
2202 lp->name, lp->msn, lp->flags, lp->dialstate);
2203 #endif
2204 if ((!matchret) && /* EAZ is matching */
2205 (((!(lp->flags & ISDN_NET_CONNECTED)) && /* but not connected */
2206 (USG_NONE(dev->usage[idx]))) || /* and ch. unused or */
2207 ((((lp->dialstate == 4) || (lp->dialstate == 12)) && /* if dialing */
2208 (!(lp->flags & ISDN_NET_CALLBACK))) /* but no callback */
2209 )))
2210 {
2211 #ifdef ISDN_DEBUG_NET_ICALL
2212 printk(KERN_DEBUG "n_fi: match1, pdev=%d pch=%d\n",
2213 lp->pre_device, lp->pre_channel);
2214 #endif
2215 if (dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) {
2216 if ((lp->pre_channel != ch) ||
2217 (lp->pre_device != di)) {
2218 /* Here we got a problem:
2219 * If using an ICN-Card, an incoming call is always signaled on
2220 * on the first channel of the card, if both channels are
2221 * down. However this channel may be bound exclusive. If the
2222 * second channel is free, this call should be accepted.
2223 * The solution is horribly but it runs, so what:
2224 * We exchange the exclusive bindings of the two channels, the
2225 * corresponding variables in the interface-structs.
2226 */
2227 if (ch == 0) {
2228 sidx = isdn_dc2minor(di, 1);
2229 #ifdef ISDN_DEBUG_NET_ICALL
2230 printk(KERN_DEBUG "n_fi: ch is 0\n");
2231 #endif
2232 if (USG_NONE(dev->usage[sidx])) {
2233 /* Second Channel is free, now see if it is bound
2234 * exclusive too. */
2235 if (dev->usage[sidx] & ISDN_USAGE_EXCLUSIVE) {
2236 #ifdef ISDN_DEBUG_NET_ICALL
2237 printk(KERN_DEBUG "n_fi: 2nd channel is down and bound\n");
2238 #endif
2239 /* Yes, swap bindings only, if the original
2240 * binding is bound to channel 1 of this driver */
2241 if ((lp->pre_device == di) &&
2242 (lp->pre_channel == 1)) {
2243 isdn_net_swapbind(di);
2244 swapped = 1;
2245 } else {
2246 /* ... else iterate next device */
2247 p = (isdn_net_dev *) p->next;
2248 continue;
2249 }
2250 } else {
2251 #ifdef ISDN_DEBUG_NET_ICALL
2252 printk(KERN_DEBUG "n_fi: 2nd channel is down and unbound\n");
2253 #endif
2254 /* No, swap always and swap excl-usage also */
2255 isdn_net_swap_usage(idx, sidx);
2256 isdn_net_swapbind(di);
2257 swapped = 2;
2258 }
2259 /* Now check for exclusive binding again */
2260 #ifdef ISDN_DEBUG_NET_ICALL
2261 printk(KERN_DEBUG "n_fi: final check\n");
2262 #endif
2263 if ((dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) &&
2264 ((lp->pre_channel != ch) ||
2265 (lp->pre_device != di))) {
2266 #ifdef ISDN_DEBUG_NET_ICALL
2267 printk(KERN_DEBUG "n_fi: final check failed\n");
2268 #endif
2269 p = (isdn_net_dev *) p->next;
2270 continue;
2271 }
2272 }
2273 } else {
2274 /* We are already on the second channel, so nothing to do */
2275 #ifdef ISDN_DEBUG_NET_ICALL
2276 printk(KERN_DEBUG "n_fi: already on 2nd channel\n");
2277 #endif
2278 }
2279 }
2280 }
2281 #ifdef ISDN_DEBUG_NET_ICALL
2282 printk(KERN_DEBUG "n_fi: match2\n");
2283 #endif
2284 n = lp->phone[0];
2285 if (lp->flags & ISDN_NET_SECURE) {
2286 while (n) {
2287 if (!isdn_msncmp(nr, n->num))
2288 break;
2289 n = (isdn_net_phone *) n->next;
2290 }
2291 }
2292 if (n || (!(lp->flags & ISDN_NET_SECURE))) {
2293 #ifdef ISDN_DEBUG_NET_ICALL
2294 printk(KERN_DEBUG "n_fi: match3\n");
2295 #endif
2296 /* matching interface found */
2297
2298 /*
2299 * Is the state STOPPED?
2300 * If so, no dialin is allowed,
2301 * so reject actively.
2302 * */
2303 if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2304 printk(KERN_INFO "incoming call, interface %s `stopped' -> rejected\n",
2305 lp->name);
2306 return 3;
2307 }
2308 /*
2309 * Is the interface up?
2310 * If not, reject the call actively.
2311 */
2312 if (!isdn_net_device_started(p)) {
2313 printk(KERN_INFO "%s: incoming call, interface down -> rejected\n",
2314 lp->name);
2315 return 3;
2316 }
2317 /* Interface is up, now see if it's a slave. If so, see if
2318 * it's master and parent slave is online. If not, reject the call.
2319 */
2320 if (lp->master) {
2321 isdn_net_local *mlp = (isdn_net_local *) lp->master->priv;
2322 printk(KERN_DEBUG "ICALLslv: %s\n", lp->name);
2323 printk(KERN_DEBUG "master=%s\n", mlp->name);
2324 if (mlp->flags & ISDN_NET_CONNECTED) {
2325 printk(KERN_DEBUG "master online\n");
2326 /* Master is online, find parent-slave (master if first slave) */
2327 while (mlp->slave) {
2328 if ((isdn_net_local *) mlp->slave->priv == lp)
2329 break;
2330 mlp = (isdn_net_local *) mlp->slave->priv;
2331 }
2332 } else
2333 printk(KERN_DEBUG "master offline\n");
2334 /* Found parent, if it's offline iterate next device */
2335 printk(KERN_DEBUG "mlpf: %d\n", mlp->flags & ISDN_NET_CONNECTED);
2336 if (!(mlp->flags & ISDN_NET_CONNECTED)) {
2337 p = (isdn_net_dev *) p->next;
2338 continue;
2339 }
2340 }
2341 if (lp->flags & ISDN_NET_CALLBACK) {
2342 int chi;
2343 /*
2344 * Is the state MANUAL?
2345 * If so, no callback can be made,
2346 * so reject actively.
2347 * */
2348 if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2349 printk(KERN_INFO "incoming call for callback, interface %s `off' -> rejected\n",
2350 lp->name);
2351 return 3;
2352 }
2353 printk(KERN_DEBUG "%s: call from %s -> %s, start callback\n",
2354 lp->name, nr, eaz);
2355 if (lp->phone[1]) {
2356 /* Grab a free ISDN-Channel */
2357 spin_lock_irqsave(&dev->lock, flags);
2358 if ((chi =
2359 isdn_get_free_channel(
2360 ISDN_USAGE_NET,
2361 lp->l2_proto,
2362 lp->l3_proto,
2363 lp->pre_device,
2364 lp->pre_channel,
2365 lp->msn)
2366 ) < 0) {
2367
2368 printk(KERN_WARNING "isdn_net_find_icall: No channel for %s\n", lp->name);
2369 spin_unlock_irqrestore(&dev->lock, flags);
2370 return 0;
2371 }
2372 /* Setup dialstate. */
2373 lp->dtimer = 0;
2374 lp->dialstate = 11;
2375 /* Connect interface with channel */
2376 isdn_net_bind_channel(lp, chi);
2377 #ifdef CONFIG_ISDN_PPP
2378 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2379 if (isdn_ppp_bind(lp) < 0) {
2380 spin_unlock_irqrestore(&dev->lock, flags);
2381 isdn_net_unbind_channel(lp);
2382 return 0;
2383 }
2384 #endif
2385 spin_unlock_irqrestore(&dev->lock, flags);
2386 /* Initiate dialing by returning 2 or 4 */
2387 return (lp->flags & ISDN_NET_CBHUP) ? 2 : 4;
2388 } else
2389 printk(KERN_WARNING "isdn_net: %s: No phone number\n", lp->name);
2390 return 0;
2391 } else {
2392 printk(KERN_DEBUG "%s: call from %s -> %s accepted\n", lp->name, nr,
2393 eaz);
2394 /* if this interface is dialing, it does it probably on a different
2395 device, so free this device */
2396 if ((lp->dialstate == 4) || (lp->dialstate == 12)) {
2397 #ifdef CONFIG_ISDN_PPP
2398 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2399 isdn_ppp_free(lp);
2400 #endif
2401 isdn_net_lp_disconnected(lp);
2402 isdn_free_channel(lp->isdn_device, lp->isdn_channel,
2403 ISDN_USAGE_NET);
2404 }
2405 spin_lock_irqsave(&dev->lock, flags);
2406 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2407 dev->usage[idx] |= ISDN_USAGE_NET;
2408 strcpy(dev->num[idx], nr);
2409 isdn_info_update();
2410 dev->st_netdev[idx] = lp->netdev;
2411 lp->isdn_device = di;
2412 lp->isdn_channel = ch;
2413 lp->ppp_slot = -1;
2414 lp->flags |= ISDN_NET_CONNECTED;
2415 lp->dialstate = 7;
2416 lp->dtimer = 0;
2417 lp->outgoing = 0;
2418 lp->huptimer = 0;
2419 lp->hupflags |= ISDN_WAITCHARGE;
2420 lp->hupflags &= ~ISDN_HAVECHARGE;
2421 #ifdef CONFIG_ISDN_PPP
2422 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
2423 if (isdn_ppp_bind(lp) < 0) {
2424 isdn_net_unbind_channel(lp);
2425 spin_unlock_irqrestore(&dev->lock, flags);
2426 return 0;
2427 }
2428 }
2429 #endif
2430 spin_unlock_irqrestore(&dev->lock, flags);
2431 return 1;
2432 }
2433 }
2434 }
2435 p = (isdn_net_dev *) p->next;
2436 }
2437 /* If none of configured EAZ/MSN matched and not verbose, be silent */
2438 if (!ematch || dev->net_verbose)
2439 printk(KERN_INFO "isdn_net: call from %s -> %d %s ignored\n", nr, di, eaz);
2440 return (wret == 2)?5:0;
2441 }
2442
2443 /*
2444 * Search list of net-interfaces for an interface with given name.
2445 */
2446 isdn_net_dev *
2447 isdn_net_findif(char *name)
2448 {
2449 isdn_net_dev *p = dev->netdev;
2450
2451 while (p) {
2452 if (!strcmp(p->local->name, name))
2453 return p;
2454 p = (isdn_net_dev *) p->next;
2455 }
2456 return (isdn_net_dev *) NULL;
2457 }
2458
2459 /*
2460 * Force a net-interface to dial out.
2461 * This is called from the userlevel-routine below or
2462 * from isdn_net_start_xmit().
2463 */
2464 int
2465 isdn_net_force_dial_lp(isdn_net_local * lp)
2466 {
2467 if ((!(lp->flags & ISDN_NET_CONNECTED)) && !lp->dialstate) {
2468 int chi;
2469 if (lp->phone[1]) {
2470 ulong flags;
2471
2472 /* Grab a free ISDN-Channel */
2473 spin_lock_irqsave(&dev->lock, flags);
2474 if ((chi = isdn_get_free_channel(
2475 ISDN_USAGE_NET,
2476 lp->l2_proto,
2477 lp->l3_proto,
2478 lp->pre_device,
2479 lp->pre_channel,
2480 lp->msn)) < 0) {
2481 printk(KERN_WARNING "isdn_net_force_dial: No channel for %s\n", lp->name);
2482 spin_unlock_irqrestore(&dev->lock, flags);
2483 return -EAGAIN;
2484 }
2485 lp->dialstate = 1;
2486 /* Connect interface with channel */
2487 isdn_net_bind_channel(lp, chi);
2488 #ifdef CONFIG_ISDN_PPP
2489 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2490 if (isdn_ppp_bind(lp) < 0) {
2491 isdn_net_unbind_channel(lp);
2492 spin_unlock_irqrestore(&dev->lock, flags);
2493 return -EAGAIN;
2494 }
2495 #endif
2496 /* Initiate dialing */
2497 spin_unlock_irqrestore(&dev->lock, flags);
2498 isdn_net_dial();
2499 return 0;
2500 } else
2501 return -EINVAL;
2502 } else
2503 return -EBUSY;
2504 }
2505
2506 /*
2507 * This is called from certain upper protocol layers (multilink ppp
2508 * and x25iface encapsulation module) that want to initiate dialing
2509 * themselves.
2510 */
2511 int
2512 isdn_net_dial_req(isdn_net_local * lp)
2513 {
2514 /* is there a better error code? */
2515 if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) return -EBUSY;
2516
2517 return isdn_net_force_dial_lp(lp);
2518 }
2519
2520 /*
2521 * Force a net-interface to dial out.
2522 * This is always called from within userspace (ISDN_IOCTL_NET_DIAL).
2523 */
2524 int
2525 isdn_net_force_dial(char *name)
2526 {
2527 isdn_net_dev *p = isdn_net_findif(name);
2528
2529 if (!p)
2530 return -ENODEV;
2531 return (isdn_net_force_dial_lp(p->local));
2532 }
2533
2534 /*
2535 * Allocate a new network-interface and initialize its data structures.
2536 */
2537 char *
2538 isdn_net_new(char *name, struct net_device *master)
2539 {
2540 isdn_net_dev *netdev;
2541
2542 /* Avoid creating an existing interface */
2543 if (isdn_net_findif(name)) {
2544 printk(KERN_WARNING "isdn_net: interface %s already exists\n", name);
2545 return NULL;
2546 }
2547 if (!(netdev = (isdn_net_dev *) kmalloc(sizeof(isdn_net_dev), GFP_KERNEL))) {
2548 printk(KERN_WARNING "isdn_net: Could not allocate net-device\n");
2549 return NULL;
2550 }
2551 memset(netdev, 0, sizeof(isdn_net_dev));
2552 if (!(netdev->local = (isdn_net_local *) kmalloc(sizeof(isdn_net_local), GFP_KERNEL))) {
2553 printk(KERN_WARNING "isdn_net: Could not allocate device locals\n");
2554 kfree(netdev);
2555 return NULL;
2556 }
2557 memset(netdev->local, 0, sizeof(isdn_net_local));
2558 if (name == NULL)
2559 strcpy(netdev->local->name, " ");
2560 else
2561 strcpy(netdev->local->name, name);
2562 strcpy(netdev->dev.name, netdev->local->name);
2563 netdev->dev.priv = netdev->local;
2564 netdev->dev.init = isdn_net_init;
2565 netdev->local->p_encap = ISDN_NET_ENCAP_RAWIP;
2566 if (master) {
2567 /* Device shall be a slave */
2568 struct net_device *p = (((isdn_net_local *) master->priv)->slave);
2569 struct net_device *q = master;
2570
2571 netdev->local->master = master;
2572 /* Put device at end of slave-chain */
2573 while (p) {
2574 q = p;
2575 p = (((isdn_net_local *) p->priv)->slave);
2576 }
2577 ((isdn_net_local *) q->priv)->slave = &(netdev->dev);
2578 } else {
2579 /* Device shall be a master */
2580 /*
2581 * Watchdog timer (currently) for master only.
2582 */
2583 netdev->dev.tx_timeout = isdn_net_tx_timeout;
2584 netdev->dev.watchdog_timeo = ISDN_NET_TX_TIMEOUT;
2585 if (register_netdev(&netdev->dev) != 0) {
2586 printk(KERN_WARNING "isdn_net: Could not register net-device\n");
2587 kfree(netdev->local);
2588 kfree(netdev);
2589 return NULL;
2590 }
2591 }
2592 netdev->local->magic = ISDN_NET_MAGIC;
2593
2594 netdev->queue = netdev->local;
2595 spin_lock_init(&netdev->queue_lock);
2596
2597 netdev->local->last = netdev->local;
2598 netdev->local->netdev = netdev;
2599 netdev->local->next = netdev->local;
2600
2601 INIT_WORK(&netdev->local->tqueue, (void *)(void *) isdn_net_softint, netdev->local);
2602 spin_lock_init(&netdev->local->xmit_lock);
2603
2604 netdev->local->isdn_device = -1;
2605 netdev->local->isdn_channel = -1;
2606 netdev->local->pre_device = -1;
2607 netdev->local->pre_channel = -1;
2608 netdev->local->exclusive = -1;
2609 netdev->local->ppp_slot = -1;
2610 netdev->local->pppbind = -1;
2611 skb_queue_head_init(&netdev->local->super_tx_queue);
2612 netdev->local->l2_proto = ISDN_PROTO_L2_X75I;
2613 netdev->local->l3_proto = ISDN_PROTO_L3_TRANS;
2614 netdev->local->triggercps = 6000;
2615 netdev->local->slavedelay = 10 * HZ;
2616 netdev->local->hupflags = ISDN_INHUP; /* Do hangup even on incoming calls */
2617 netdev->local->onhtime = 10; /* Default hangup-time for saving costs
2618 of those who forget configuring this */
2619 netdev->local->dialmax = 1;
2620 netdev->local->flags = ISDN_NET_CBHUP | ISDN_NET_DM_MANUAL; /* Hangup before Callback, manual dial */
2621 netdev->local->cbdelay = 25; /* Wait 5 secs before Callback */
2622 netdev->local->dialtimeout = -1; /* Infinite Dial-Timeout */
2623 netdev->local->dialwait = 5 * HZ; /* Wait 5 sec. after failed dial */
2624 netdev->local->dialstarted = 0; /* Jiffies of last dial-start */
2625 netdev->local->dialwait_timer = 0; /* Jiffies of earliest next dial-start */
2626
2627 /* Put into to netdev-chain */
2628 netdev->next = (void *) dev->netdev;
2629 dev->netdev = netdev;
2630 return netdev->dev.name;
2631 }
2632
2633 char *
2634 isdn_net_newslave(char *parm)
2635 {
2636 char *p = strchr(parm, ',');
2637 isdn_net_dev *n;
2638 char newname[10];
2639
2640 if (p) {
2641 /* Slave-Name MUST not be empty */
2642 if (!strlen(p + 1))
2643 return NULL;
2644 strcpy(newname, p + 1);
2645 *p = 0;
2646 /* Master must already exist */
2647 if (!(n = isdn_net_findif(parm)))
2648 return NULL;
2649 /* Master must be a real interface, not a slave */
2650 if (n->local->master)
2651 return NULL;
2652 /* Master must not be started yet */
2653 if (isdn_net_device_started(n))
2654 return NULL;
2655 return (isdn_net_new(newname, &(n->dev)));
2656 }
2657 return NULL;
2658 }
2659
2660 /*
2661 * Set interface-parameters.
2662 * Always set all parameters, so the user-level application is responsible
2663 * for not overwriting existing setups. It has to get the current
2664 * setup first, if only selected parameters are to be changed.
2665 */
2666 int
2667 isdn_net_setcfg(isdn_net_ioctl_cfg * cfg)
2668 {
2669 isdn_net_dev *p = isdn_net_findif(cfg->name);
2670 ulong features;
2671 int i;
2672 int drvidx;
2673 int chidx;
2674 char drvid[25];
2675
2676 if (p) {
2677 isdn_net_local *lp = p->local;
2678
2679 /* See if any registered driver supports the features we want */
2680 features = ((1 << cfg->l2_proto) << ISDN_FEATURE_L2_SHIFT) |
2681 ((1 << cfg->l3_proto) << ISDN_FEATURE_L3_SHIFT);
2682 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2683 if (dev->drv[i])
2684 if ((dev->drv[i]->interface->features & features) == features)
2685 break;
2686 if (i == ISDN_MAX_DRIVERS) {
2687 printk(KERN_WARNING "isdn_net: No driver with selected features\n");
2688 return -ENODEV;
2689 }
2690 if (lp->p_encap != cfg->p_encap){
2691 #ifdef CONFIG_ISDN_X25
2692 struct concap_proto * cprot = p -> cprot;
2693 #endif
2694 if (isdn_net_device_started(p)) {
2695 printk(KERN_WARNING "%s: cannot change encap when if is up\n",
2696 lp->name);
2697 return -EBUSY;
2698 }
2699 #ifdef CONFIG_ISDN_X25
2700 if( cprot && cprot -> pops )
2701 cprot -> pops -> proto_del ( cprot );
2702 p -> cprot = NULL;
2703 lp -> dops = NULL;
2704 /* ... , prepare for configuration of new one ... */
2705 switch ( cfg -> p_encap ){
2706 case ISDN_NET_ENCAP_X25IFACE:
2707 lp -> dops = &isdn_concap_reliable_dl_dops;
2708 }
2709 /* ... and allocate new one ... */
2710 p -> cprot = isdn_concap_new( cfg -> p_encap );
2711 /* p -> cprot == NULL now if p_encap is not supported
2712 by means of the concap_proto mechanism */
2713 /* the protocol is not configured yet; this will
2714 happen later when isdn_net_reset() is called */
2715 #endif
2716 }
2717 switch ( cfg->p_encap ) {
2718 case ISDN_NET_ENCAP_SYNCPPP:
2719 #ifndef CONFIG_ISDN_PPP
2720 printk(KERN_WARNING "%s: SyncPPP support not configured\n",
2721 lp->name);
2722 return -EINVAL;
2723 #else
2724 p->dev.type = ARPHRD_PPP; /* change ARP type */
2725 p->dev.addr_len = 0;
2726 p->dev.do_ioctl = isdn_ppp_dev_ioctl;
2727 #endif
2728 break;
2729 case ISDN_NET_ENCAP_X25IFACE:
2730 #ifndef CONFIG_ISDN_X25
2731 printk(KERN_WARNING "%s: isdn-x25 support not configured\n",
2732 p->local->name);
2733 return -EINVAL;
2734 #else
2735 p->dev.type = ARPHRD_X25; /* change ARP type */
2736 p->dev.addr_len = 0;
2737 #endif
2738 break;
2739 case ISDN_NET_ENCAP_CISCOHDLCK:
2740 p->dev.do_ioctl = isdn_ciscohdlck_dev_ioctl;
2741 break;
2742 default:
2743 if( cfg->p_encap >= 0 &&
2744 cfg->p_encap <= ISDN_NET_ENCAP_MAX_ENCAP )
2745 break;
2746 printk(KERN_WARNING
2747 "%s: encapsulation protocol %d not supported\n",
2748 p->local->name, cfg->p_encap);
2749 return -EINVAL;
2750 }
2751 if (strlen(cfg->drvid)) {
2752 /* A bind has been requested ... */
2753 char *c,
2754 *e;
2755
2756 drvidx = -1;
2757 chidx = -1;
2758 strcpy(drvid, cfg->drvid);
2759 if ((c = strchr(drvid, ','))) {
2760 /* The channel-number is appended to the driver-Id with a comma */
2761 chidx = (int) simple_strtoul(c + 1, &e, 10);
2762 if (e == c)
2763 chidx = -1;
2764 *c = '\0';
2765 }
2766 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2767 /* Lookup driver-Id in array */
2768 if (!(strcmp(dev->drvid[i], drvid))) {
2769 drvidx = i;
2770 break;
2771 }
2772 if ((drvidx == -1) || (chidx == -1))
2773 /* Either driver-Id or channel-number invalid */
2774 return -ENODEV;
2775 } else {
2776 /* Parameters are valid, so get them */
2777 drvidx = lp->pre_device;
2778 chidx = lp->pre_channel;
2779 }
2780 if (cfg->exclusive > 0) {
2781 unsigned long flags;
2782
2783 /* If binding is exclusive, try to grab the channel */
2784 spin_lock_irqsave(&dev->lock, flags);
2785 if ((i = isdn_get_free_channel(ISDN_USAGE_NET,
2786 lp->l2_proto, lp->l3_proto, drvidx,
2787 chidx, lp->msn)) < 0) {
2788 /* Grab failed, because desired channel is in use */
2789 lp->exclusive = -1;
2790 spin_unlock_irqrestore(&dev->lock, flags);
2791 return -EBUSY;
2792 }
2793 /* All went ok, so update isdninfo */
2794 dev->usage[i] = ISDN_USAGE_EXCLUSIVE;
2795 isdn_info_update();
2796 spin_unlock_irqrestore(&dev->lock, flags);
2797 lp->exclusive = i;
2798 } else {
2799 /* Non-exclusive binding or unbind. */
2800 lp->exclusive = -1;
2801 if ((lp->pre_device != -1) && (cfg->exclusive == -1)) {
2802 isdn_unexclusive_channel(lp->pre_device, lp->pre_channel);
2803 isdn_free_channel(lp->pre_device, lp->pre_channel, ISDN_USAGE_NET);
2804 drvidx = -1;
2805 chidx = -1;
2806 }
2807 }
2808 strcpy(lp->msn, cfg->eaz);
2809 lp->pre_device = drvidx;
2810 lp->pre_channel = chidx;
2811 lp->onhtime = cfg->onhtime;
2812 lp->charge = cfg->charge;
2813 lp->l2_proto = cfg->l2_proto;
2814 lp->l3_proto = cfg->l3_proto;
2815 lp->cbdelay = cfg->cbdelay;
2816 lp->dialmax = cfg->dialmax;
2817 lp->triggercps = cfg->triggercps;
2818 lp->slavedelay = cfg->slavedelay * HZ;
2819 lp->pppbind = cfg->pppbind;
2820 lp->dialtimeout = cfg->dialtimeout >= 0 ? cfg->dialtimeout * HZ : -1;
2821 lp->dialwait = cfg->dialwait * HZ;
2822 if (cfg->secure)
2823 lp->flags |= ISDN_NET_SECURE;
2824 else
2825 lp->flags &= ~ISDN_NET_SECURE;
2826 if (cfg->cbhup)
2827 lp->flags |= ISDN_NET_CBHUP;
2828 else
2829 lp->flags &= ~ISDN_NET_CBHUP;
2830 switch (cfg->callback) {
2831 case 0:
2832 lp->flags &= ~(ISDN_NET_CALLBACK | ISDN_NET_CBOUT);
2833 break;
2834 case 1:
2835 lp->flags |= ISDN_NET_CALLBACK;
2836 lp->flags &= ~ISDN_NET_CBOUT;
2837 break;
2838 case 2:
2839 lp->flags |= ISDN_NET_CBOUT;
2840 lp->flags &= ~ISDN_NET_CALLBACK;
2841 break;
2842 }
2843 lp->flags &= ~ISDN_NET_DIALMODE_MASK; /* first all bits off */
2844 if (cfg->dialmode && !(cfg->dialmode & ISDN_NET_DIALMODE_MASK)) {
2845 /* old isdnctrl version, where only 0 or 1 is given */
2846 printk(KERN_WARNING
2847 "Old isdnctrl version detected! Please update.\n");
2848 lp->flags |= ISDN_NET_DM_OFF; /* turn on `off' bit */
2849 }
2850 else {
2851 lp->flags |= cfg->dialmode; /* turn on selected bits */
2852 }
2853 if (cfg->chargehup)
2854 lp->hupflags |= ISDN_CHARGEHUP;
2855 else
2856 lp->hupflags &= ~ISDN_CHARGEHUP;
2857 if (cfg->ihup)
2858 lp->hupflags |= ISDN_INHUP;
2859 else
2860 lp->hupflags &= ~ISDN_INHUP;
2861 if (cfg->chargeint > 10) {
2862 lp->hupflags |= ISDN_CHARGEHUP | ISDN_HAVECHARGE | ISDN_MANCHARGE;
2863 lp->chargeint = cfg->chargeint * HZ;
2864 }
2865 if (cfg->p_encap != lp->p_encap) {
2866 if (cfg->p_encap == ISDN_NET_ENCAP_RAWIP) {
2867 p->dev.hard_header = NULL;
2868 p->dev.hard_header_cache = NULL;
2869 p->dev.header_cache_update = NULL;
2870 p->dev.flags = IFF_NOARP|IFF_POINTOPOINT;
2871 } else {
2872 p->dev.hard_header = isdn_net_header;
2873 if (cfg->p_encap == ISDN_NET_ENCAP_ETHER) {
2874 p->dev.hard_header_cache = lp->org_hhc;
2875 p->dev.header_cache_update = lp->org_hcu;
2876 p->dev.flags = IFF_BROADCAST | IFF_MULTICAST;
2877 } else {
2878 p->dev.hard_header_cache = NULL;
2879 p->dev.header_cache_update = NULL;
2880 p->dev.flags = IFF_NOARP|IFF_POINTOPOINT;
2881 }
2882 }
2883 }
2884 lp->p_encap = cfg->p_encap;
2885 return 0;
2886 }
2887 return -ENODEV;
2888 }
2889
2890 /*
2891 * Perform get-interface-parameters.ioctl
2892 */
2893 int
2894 isdn_net_getcfg(isdn_net_ioctl_cfg * cfg)
2895 {
2896 isdn_net_dev *p = isdn_net_findif(cfg->name);
2897
2898 if (p) {
2899 isdn_net_local *lp = p->local;
2900
2901 strcpy(cfg->eaz, lp->msn);
2902 cfg->exclusive = lp->exclusive;
2903 if (lp->pre_device >= 0) {
2904 sprintf(cfg->drvid, "%s,%d", dev->drvid[lp->pre_device],
2905 lp->pre_channel);
2906 } else
2907 cfg->drvid[0] = '\0';
2908 cfg->onhtime = lp->onhtime;
2909 cfg->charge = lp->charge;
2910 cfg->l2_proto = lp->l2_proto;
2911 cfg->l3_proto = lp->l3_proto;
2912 cfg->p_encap = lp->p_encap;
2913 cfg->secure = (lp->flags & ISDN_NET_SECURE) ? 1 : 0;
2914 cfg->callback = 0;
2915 if (lp->flags & ISDN_NET_CALLBACK)
2916 cfg->callback = 1;
2917 if (lp->flags & ISDN_NET_CBOUT)
2918 cfg->callback = 2;
2919 cfg->cbhup = (lp->flags & ISDN_NET_CBHUP) ? 1 : 0;
2920 cfg->dialmode = lp->flags & ISDN_NET_DIALMODE_MASK;
2921 cfg->chargehup = (lp->hupflags & 4) ? 1 : 0;
2922 cfg->ihup = (lp->hupflags & 8) ? 1 : 0;
2923 cfg->cbdelay = lp->cbdelay;
2924 cfg->dialmax = lp->dialmax;
2925 cfg->triggercps = lp->triggercps;
2926 cfg->slavedelay = lp->slavedelay / HZ;
2927 cfg->chargeint = (lp->hupflags & ISDN_CHARGEHUP) ?
2928 (lp->chargeint / HZ) : 0;
2929 cfg->pppbind = lp->pppbind;
2930 cfg->dialtimeout = lp->dialtimeout >= 0 ? lp->dialtimeout / HZ : -1;
2931 cfg->dialwait = lp->dialwait / HZ;
2932 if (lp->slave)
2933 strcpy(cfg->slave, ((isdn_net_local *) lp->slave->priv)->name);
2934 else
2935 cfg->slave[0] = '\0';
2936 if (lp->master)
2937 strcpy(cfg->master, ((isdn_net_local *) lp->master->priv)->name);
2938 else
2939 cfg->master[0] = '\0';
2940 return 0;
2941 }
2942 return -ENODEV;
2943 }
2944
2945 /*
2946 * Add a phone-number to an interface.
2947 */
2948 int
2949 isdn_net_addphone(isdn_net_ioctl_phone * phone)
2950 {
2951 isdn_net_dev *p = isdn_net_findif(phone->name);
2952 isdn_net_phone *n;
2953
2954 if (p) {
2955 if (!(n = (isdn_net_phone *) kmalloc(sizeof(isdn_net_phone), GFP_KERNEL)))
2956 return -ENOMEM;
2957 strcpy(n->num, phone->phone);
2958 n->next = p->local->phone[phone->outgoing & 1];
2959 p->local->phone[phone->outgoing & 1] = n;
2960 return 0;
2961 }
2962 return -ENODEV;
2963 }
2964
2965 /*
2966 * Copy a string of all phone-numbers of an interface to user space.
2967 * This might sleep and must be called with the isdn semaphore down.
2968 */
2969 int
2970 isdn_net_getphones(isdn_net_ioctl_phone * phone, char __user *phones)
2971 {
2972 isdn_net_dev *p = isdn_net_findif(phone->name);
2973 int inout = phone->outgoing & 1;
2974 int more = 0;
2975 int count = 0;
2976 isdn_net_phone *n;
2977
2978 if (!p)
2979 return -ENODEV;
2980 inout &= 1;
2981 for (n = p->local->phone[inout]; n; n = n->next) {
2982 if (more) {
2983 put_user(' ', phones++);
2984 count++;
2985 }
2986 if (copy_to_user(phones, n->num, strlen(n->num) + 1)) {
2987 return -EFAULT;
2988 }
2989 phones += strlen(n->num);
2990 count += strlen(n->num);
2991 more = 1;
2992 }
2993 put_user(0, phones);
2994 count++;
2995 return count;
2996 }
2997
2998 /*
2999 * Copy a string containing the peer's phone number of a connected interface
3000 * to user space.
3001 */
3002 int
3003 isdn_net_getpeer(isdn_net_ioctl_phone *phone, isdn_net_ioctl_phone __user *peer)
3004 {
3005 isdn_net_dev *p = isdn_net_findif(phone->name);
3006 int ch, dv, idx;
3007
3008 if (!p) return -ENODEV;
3009 /*
3010 * Theoretical race: while this executes, the remote number might
3011 * become invalid (hang up) or change (new connection), resulting
3012 * in (partially) wrong number copied to user. This race
3013 * currently ignored.
3014 */
3015 ch = p->local->isdn_channel;
3016 dv = p->local->isdn_device;
3017 if(ch<0 && dv<0) return -ENOTCONN;
3018 idx = isdn_dc2minor(dv, ch);
3019 if (idx<0) return -ENODEV;
3020 /* for pre-bound channels, we need this extra check */
3021 if ( strncmp(dev->num[idx],"???",3) == 0 ) return -ENOTCONN;
3022 strncpy(phone->phone,dev->num[idx],ISDN_MSNLEN);
3023 phone->outgoing=USG_OUTGOING(dev->usage[idx]);
3024 if ( copy_to_user(peer,phone,sizeof(*peer)) ) return -EFAULT;
3025 return 0;
3026 }
3027 /*
3028 * Delete a phone-number from an interface.
3029 */
3030 int
3031 isdn_net_delphone(isdn_net_ioctl_phone * phone)
3032 {
3033 isdn_net_dev *p = isdn_net_findif(phone->name);
3034 int inout = phone->outgoing & 1;
3035 isdn_net_phone *n;
3036 isdn_net_phone *m;
3037
3038 if (p) {
3039 n = p->local->phone[inout];
3040 m = NULL;
3041 while (n) {
3042 if (!strcmp(n->num, phone->phone)) {
3043 if (p->local->dial == n)
3044 p->local->dial = n->next;
3045 if (m)
3046 m->next = n->next;
3047 else
3048 p->local->phone[inout] = n->next;
3049 kfree(n);
3050 return 0;
3051 }
3052 m = n;
3053 n = (isdn_net_phone *) n->next;
3054 }
3055 return -EINVAL;
3056 }
3057 return -ENODEV;
3058 }
3059
3060 /*
3061 * Delete all phone-numbers of an interface.
3062 */
3063 static int
3064 isdn_net_rmallphone(isdn_net_dev * p)
3065 {
3066 isdn_net_phone *n;
3067 isdn_net_phone *m;
3068 int i;
3069
3070 for (i = 0; i < 2; i++) {
3071 n = p->local->phone[i];
3072 while (n) {
3073 m = n->next;
3074 kfree(n);
3075 n = m;
3076 }
3077 p->local->phone[i] = NULL;
3078 }
3079 p->local->dial = NULL;
3080 return 0;
3081 }
3082
3083 /*
3084 * Force a hangup of a network-interface.
3085 */
3086 int
3087 isdn_net_force_hangup(char *name)
3088 {
3089 isdn_net_dev *p = isdn_net_findif(name);
3090 struct net_device *q;
3091
3092 if (p) {
3093 if (p->local->isdn_device < 0)
3094 return 1;
3095 q = p->local->slave;
3096 /* If this interface has slaves, do a hangup for them also. */
3097 while (q) {
3098 isdn_net_hangup(q);
3099 q = (((isdn_net_local *) q->priv)->slave);
3100 }
3101 isdn_net_hangup(&p->dev);
3102 return 0;
3103 }
3104 return -ENODEV;
3105 }
3106
3107 /*
3108 * Helper-function for isdn_net_rm: Do the real work.
3109 */
3110 static int
3111 isdn_net_realrm(isdn_net_dev * p, isdn_net_dev * q)
3112 {
3113 u_long flags;
3114
3115 if (isdn_net_device_started(p)) {
3116 return -EBUSY;
3117 }
3118 #ifdef CONFIG_ISDN_X25
3119 if( p -> cprot && p -> cprot -> pops )
3120 p -> cprot -> pops -> proto_del ( p -> cprot );
3121 #endif
3122 /* Free all phone-entries */
3123 isdn_net_rmallphone(p);
3124 /* If interface is bound exclusive, free channel-usage */
3125 if (p->local->exclusive != -1)
3126 isdn_unexclusive_channel(p->local->pre_device, p->local->pre_channel);
3127 if (p->local->master) {
3128 /* It's a slave-device, so update master's slave-pointer if necessary */
3129 if (((isdn_net_local *) (p->local->master->priv))->slave == &p->dev)
3130 ((isdn_net_local *) (p->local->master->priv))->slave = p->local->slave;
3131 } else {
3132 /* Unregister only if it's a master-device */
3133 p->dev.hard_header_cache = p->local->org_hhc;
3134 p->dev.header_cache_update = p->local->org_hcu;
3135 unregister_netdev(&p->dev);
3136 }
3137 /* Unlink device from chain */
3138 spin_lock_irqsave(&dev->lock, flags);
3139 if (q)
3140 q->next = p->next;
3141 else
3142 dev->netdev = p->next;
3143 if (p->local->slave) {
3144 /* If this interface has a slave, remove it also */
3145 char *slavename = ((isdn_net_local *) (p->local->slave->priv))->name;
3146 isdn_net_dev *n = dev->netdev;
3147 q = NULL;
3148 while (n) {
3149 if (!strcmp(n->local->name, slavename)) {
3150 spin_unlock_irqrestore(&dev->lock, flags);
3151 isdn_net_realrm(n, q);
3152 spin_lock_irqsave(&dev->lock, flags);
3153 break;
3154 }
3155 q = n;
3156 n = (isdn_net_dev *) n->next;
3157 }
3158 }
3159 spin_unlock_irqrestore(&dev->lock, flags);
3160 /* If no more net-devices remain, disable auto-hangup timer */
3161 if (dev->netdev == NULL)
3162 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3163 kfree(p->local);
3164 kfree(p);
3165
3166 return 0;
3167 }
3168
3169 /*
3170 * Remove a single network-interface.
3171 */
3172 int
3173 isdn_net_rm(char *name)
3174 {
3175 u_long flags;
3176 isdn_net_dev *p;
3177 isdn_net_dev *q;
3178
3179 /* Search name in netdev-chain */
3180 spin_lock_irqsave(&dev->lock, flags);
3181 p = dev->netdev;
3182 q = NULL;
3183 while (p) {
3184 if (!strcmp(p->local->name, name)) {
3185 spin_unlock_irqrestore(&dev->lock, flags);
3186 return (isdn_net_realrm(p, q));
3187 }
3188 q = p;
3189 p = (isdn_net_dev *) p->next;
3190 }
3191 spin_unlock_irqrestore(&dev->lock, flags);
3192 /* If no more net-devices remain, disable auto-hangup timer */
3193 if (dev->netdev == NULL)
3194 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3195 return -ENODEV;
3196 }
3197
3198 /*
3199 * Remove all network-interfaces
3200 */
3201 int
3202 isdn_net_rmall(void)
3203 {
3204 u_long flags;
3205 int ret;
3206
3207 /* Walk through netdev-chain */
3208 spin_lock_irqsave(&dev->lock, flags);
3209 while (dev->netdev) {
3210 if (!dev->netdev->local->master) {
3211 /* Remove master-devices only, slaves get removed with their master */
3212 spin_unlock_irqrestore(&dev->lock, flags);
3213 if ((ret = isdn_net_realrm(dev->netdev, NULL))) {
3214 return ret;
3215 }
3216 spin_lock_irqsave(&dev->lock, flags);
3217 }
3218 }
3219 dev->netdev = NULL;
3220 spin_unlock_irqrestore(&dev->lock, flags);
3221 return 0;
3222 }
Linux with added FPC-III support