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Linux 4.18.10
[linux/fpc-iii.git] / drivers / isdn / i4l / isdn_net.c
blobc138f66f26595bcfe714f1b3e1f0838ef4ab6c3f
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/isdn.h>
26 #include <linux/slab.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 it 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_MASTER_PRIV(lp)->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 static int isdn_net_force_dial_lp(isdn_net_local *);
180 static netdev_tx_t isdn_net_start_xmit(struct sk_buff *,
181 struct net_device *);
182
183 static void isdn_net_ciscohdlck_connected(isdn_net_local *lp);
184 static void isdn_net_ciscohdlck_disconnected(isdn_net_local *lp);
185
186 char *isdn_net_revision = "$Revision: 1.1.2.2 $";
187
188 /*
189 * Code for raw-networking over ISDN
190 */
191
192 static void
193 isdn_net_unreachable(struct net_device *dev, struct sk_buff *skb, char *reason)
194 {
195 if (skb) {
196
197 u_short proto = ntohs(skb->protocol);
198
199 printk(KERN_DEBUG "isdn_net: %s: %s, signalling dst_link_failure %s\n",
200 dev->name,
201 (reason != NULL) ? reason : "unknown",
202 (proto != ETH_P_IP) ? "Protocol != ETH_P_IP" : "");
203
204 dst_link_failure(skb);
205 }
206 else { /* dial not triggered by rawIP packet */
207 printk(KERN_DEBUG "isdn_net: %s: %s\n",
208 dev->name,
209 (reason != NULL) ? reason : "reason unknown");
210 }
211 }
212
213 static void
214 isdn_net_reset(struct net_device *dev)
215 {
216 #ifdef CONFIG_ISDN_X25
217 struct concap_device_ops *dops =
218 ((isdn_net_local *)netdev_priv(dev))->dops;
219 struct concap_proto *cprot =
220 ((isdn_net_local *)netdev_priv(dev))->netdev->cprot;
221 #endif
222 #ifdef CONFIG_ISDN_X25
223 if (cprot && cprot->pops && dops)
224 cprot->pops->restart(cprot, dev, dops);
225 #endif
226 }
227
228 /* Open/initialize the board. */
229 static int
230 isdn_net_open(struct net_device *dev)
231 {
232 int i;
233 struct net_device *p;
234 struct in_device *in_dev;
235
236 /* moved here from isdn_net_reset, because only the master has an
237 interface associated which is supposed to be started. BTW:
238 we need to call netif_start_queue, not netif_wake_queue here */
239 netif_start_queue(dev);
240
241 isdn_net_reset(dev);
242 /* Fill in the MAC-level header (not needed, but for compatibility... */
243 for (i = 0; i < ETH_ALEN - sizeof(u32); i++)
244 dev->dev_addr[i] = 0xfc;
245 if ((in_dev = dev->ip_ptr) != NULL) {
246 /*
247 * Any address will do - we take the first
248 */
249 struct in_ifaddr *ifa = in_dev->ifa_list;
250 if (ifa != NULL)
251 memcpy(dev->dev_addr + 2, &ifa->ifa_local, 4);
252 }
253
254 /* If this interface has slaves, start them also */
255 p = MASTER_TO_SLAVE(dev);
256 if (p) {
257 while (p) {
258 isdn_net_reset(p);
259 p = MASTER_TO_SLAVE(p);
260 }
261 }
262 isdn_lock_drivers();
263 return 0;
264 }
265
266 /*
267 * Assign an ISDN-channel to a net-interface
268 */
269 static void
270 isdn_net_bind_channel(isdn_net_local *lp, int idx)
271 {
272 lp->flags |= ISDN_NET_CONNECTED;
273 lp->isdn_device = dev->drvmap[idx];
274 lp->isdn_channel = dev->chanmap[idx];
275 dev->rx_netdev[idx] = lp->netdev;
276 dev->st_netdev[idx] = lp->netdev;
277 }
278
279 /*
280 * unbind a net-interface (resets interface after an error)
281 */
282 static void
283 isdn_net_unbind_channel(isdn_net_local *lp)
284 {
285 skb_queue_purge(&lp->super_tx_queue);
286
287 if (!lp->master) { /* reset only master device */
288 /* Moral equivalent of dev_purge_queues():
289 BEWARE! This chunk of code cannot be called from hardware
290 interrupt handler. I hope it is true. --ANK
291 */
292 qdisc_reset_all_tx(lp->netdev->dev);
293 }
294 lp->dialstate = 0;
295 dev->rx_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
296 dev->st_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
297 if (lp->isdn_device != -1 && lp->isdn_channel != -1)
298 isdn_free_channel(lp->isdn_device, lp->isdn_channel,
299 ISDN_USAGE_NET);
300 lp->flags &= ~ISDN_NET_CONNECTED;
301 lp->isdn_device = -1;
302 lp->isdn_channel = -1;
303 }
304
305 /*
306 * Perform auto-hangup and cps-calculation for net-interfaces.
307 *
308 * auto-hangup:
309 * Increment idle-counter (this counter is reset on any incoming or
310 * outgoing packet), if counter exceeds configured limit either do a
311 * hangup immediately or - if configured - wait until just before the next
312 * charge-info.
313 *
314 * cps-calculation (needed for dynamic channel-bundling):
315 * Since this function is called every second, simply reset the
316 * byte-counter of the interface after copying it to the cps-variable.
317 */
318 static unsigned long last_jiffies = -HZ;
319
320 void
321 isdn_net_autohup(void)
322 {
323 isdn_net_dev *p = dev->netdev;
324 int anymore;
325
326 anymore = 0;
327 while (p) {
328 isdn_net_local *l = p->local;
329 if (jiffies == last_jiffies)
330 l->cps = l->transcount;
331 else
332 l->cps = (l->transcount * HZ) / (jiffies - last_jiffies);
333 l->transcount = 0;
334 if (dev->net_verbose > 3)
335 printk(KERN_DEBUG "%s: %d bogocps\n", p->dev->name, l->cps);
336 if ((l->flags & ISDN_NET_CONNECTED) && (!l->dialstate)) {
337 anymore = 1;
338 l->huptimer++;
339 /*
340 * if there is some dialmode where timeout-hangup
341 * should _not_ be done, check for that here
342 */
343 if ((l->onhtime) &&
344 (l->huptimer > l->onhtime))
345 {
346 if (l->hupflags & ISDN_MANCHARGE &&
347 l->hupflags & ISDN_CHARGEHUP) {
348 while (time_after(jiffies, l->chargetime + l->chargeint))
349 l->chargetime += l->chargeint;
350 if (time_after(jiffies, l->chargetime + l->chargeint - 2 * HZ))
351 if (l->outgoing || l->hupflags & ISDN_INHUP)
352 isdn_net_hangup(p->dev);
353 } else if (l->outgoing) {
354 if (l->hupflags & ISDN_CHARGEHUP) {
355 if (l->hupflags & ISDN_WAITCHARGE) {
356 printk(KERN_DEBUG "isdn_net: Hupflags of %s are %X\n",
357 p->dev->name, l->hupflags);
358 isdn_net_hangup(p->dev);
359 } else if (time_after(jiffies, l->chargetime + l->chargeint)) {
360 printk(KERN_DEBUG
361 "isdn_net: %s: chtime = %lu, chint = %d\n",
362 p->dev->name, l->chargetime, l->chargeint);
363 isdn_net_hangup(p->dev);
364 }
365 } else
366 isdn_net_hangup(p->dev);
367 } else if (l->hupflags & ISDN_INHUP)
368 isdn_net_hangup(p->dev);
369 }
370
371 if (dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*l) == ISDN_NET_DM_OFF)) {
372 isdn_net_hangup(p->dev);
373 break;
374 }
375 }
376 p = (isdn_net_dev *) p->next;
377 }
378 last_jiffies = jiffies;
379 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, anymore);
380 }
381
382 static void isdn_net_lp_disconnected(isdn_net_local *lp)
383 {
384 isdn_net_rm_from_bundle(lp);
385 }
386
387 /*
388 * Handle status-messages from ISDN-interfacecard.
389 * This function is called from within the main-status-dispatcher
390 * isdn_status_callback, which itself is called from the low-level driver.
391 * Return: 1 = Event handled, 0 = not for us or unknown Event.
392 */
393 int
394 isdn_net_stat_callback(int idx, isdn_ctrl *c)
395 {
396 isdn_net_dev *p = dev->st_netdev[idx];
397 int cmd = c->command;
398
399 if (p) {
400 isdn_net_local *lp = p->local;
401 #ifdef CONFIG_ISDN_X25
402 struct concap_proto *cprot = lp->netdev->cprot;
403 struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
404 #endif
405 switch (cmd) {
406 case ISDN_STAT_BSENT:
407 /* A packet has successfully been sent out */
408 if ((lp->flags & ISDN_NET_CONNECTED) &&
409 (!lp->dialstate)) {
410 isdn_net_dec_frame_cnt(lp);
411 lp->stats.tx_packets++;
412 lp->stats.tx_bytes += c->parm.length;
413 }
414 return 1;
415 case ISDN_STAT_DCONN:
416 /* D-Channel is up */
417 switch (lp->dialstate) {
418 case 4:
419 case 7:
420 case 8:
421 lp->dialstate++;
422 return 1;
423 case 12:
424 lp->dialstate = 5;
425 return 1;
426 }
427 break;
428 case ISDN_STAT_DHUP:
429 /* Either D-Channel-hangup or error during dialout */
430 #ifdef CONFIG_ISDN_X25
431 /* If we are not connencted then dialing had
432 failed. If there are generic encap protocol
433 receiver routines signal the closure of
434 the link*/
435
436 if (!(lp->flags & ISDN_NET_CONNECTED)
437 && pops && pops->disconn_ind)
438 pops->disconn_ind(cprot);
439 #endif /* CONFIG_ISDN_X25 */
440 if ((!lp->dialstate) && (lp->flags & ISDN_NET_CONNECTED)) {
441 if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
442 isdn_net_ciscohdlck_disconnected(lp);
443 #ifdef CONFIG_ISDN_PPP
444 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
445 isdn_ppp_free(lp);
446 #endif
447 isdn_net_lp_disconnected(lp);
448 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
449 printk(KERN_INFO "%s: remote hangup\n", p->dev->name);
450 printk(KERN_INFO "%s: Chargesum is %d\n", p->dev->name,
451 lp->charge);
452 isdn_net_unbind_channel(lp);
453 return 1;
454 }
455 break;
456 #ifdef CONFIG_ISDN_X25
457 case ISDN_STAT_BHUP:
458 /* B-Channel-hangup */
459 /* try if there are generic encap protocol
460 receiver routines and signal the closure of
461 the link */
462 if (pops && pops->disconn_ind) {
463 pops->disconn_ind(cprot);
464 return 1;
465 }
466 break;
467 #endif /* CONFIG_ISDN_X25 */
468 case ISDN_STAT_BCONN:
469 /* B-Channel is up */
470 isdn_net_zero_frame_cnt(lp);
471 switch (lp->dialstate) {
472 case 5:
473 case 6:
474 case 7:
475 case 8:
476 case 9:
477 case 10:
478 case 12:
479 if (lp->dialstate <= 6) {
480 dev->usage[idx] |= ISDN_USAGE_OUTGOING;
481 isdn_info_update();
482 } else
483 dev->rx_netdev[idx] = p;
484 lp->dialstate = 0;
485 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 1);
486 if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
487 isdn_net_ciscohdlck_connected(lp);
488 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP) {
489 if (lp->master) { /* is lp a slave? */
490 isdn_net_dev *nd = ISDN_MASTER_PRIV(lp)->netdev;
491 isdn_net_add_to_bundle(nd, lp);
492 }
493 }
494 printk(KERN_INFO "isdn_net: %s connected\n", p->dev->name);
495 /* If first Chargeinfo comes before B-Channel connect,
496 * we correct the timestamp here.
497 */
498 lp->chargetime = jiffies;
499
500 /* reset dial-timeout */
501 lp->dialstarted = 0;
502 lp->dialwait_timer = 0;
503
504 #ifdef CONFIG_ISDN_PPP
505 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
506 isdn_ppp_wakeup_daemon(lp);
507 #endif
508 #ifdef CONFIG_ISDN_X25
509 /* try if there are generic concap receiver routines */
510 if (pops)
511 if (pops->connect_ind)
512 pops->connect_ind(cprot);
513 #endif /* CONFIG_ISDN_X25 */
514 /* ppp needs to do negotiations first */
515 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP)
516 isdn_net_device_wake_queue(lp);
517 return 1;
518 }
519 break;
520 case ISDN_STAT_NODCH:
521 /* No D-Channel avail. */
522 if (lp->dialstate == 4) {
523 lp->dialstate--;
524 return 1;
525 }
526 break;
527 case ISDN_STAT_CINF:
528 /* Charge-info from TelCo. Calculate interval between
529 * charge-infos and set timestamp for last info for
530 * usage by isdn_net_autohup()
531 */
532 lp->charge++;
533 if (lp->hupflags & ISDN_HAVECHARGE) {
534 lp->hupflags &= ~ISDN_WAITCHARGE;
535 lp->chargeint = jiffies - lp->chargetime - (2 * HZ);
536 }
537 if (lp->hupflags & ISDN_WAITCHARGE)
538 lp->hupflags |= ISDN_HAVECHARGE;
539 lp->chargetime = jiffies;
540 printk(KERN_DEBUG "isdn_net: Got CINF chargetime of %s now %lu\n",
541 p->dev->name, lp->chargetime);
542 return 1;
543 }
544 }
545 return 0;
546 }
547
548 /*
549 * Perform dialout for net-interfaces and timeout-handling for
550 * D-Channel-up and B-Channel-up Messages.
551 * This function is initially called from within isdn_net_start_xmit() or
552 * or isdn_net_find_icall() after initializing the dialstate for an
553 * interface. If further calls are needed, the function schedules itself
554 * for a timer-callback via isdn_timer_function().
555 * The dialstate is also affected by incoming status-messages from
556 * the ISDN-Channel which are handled in isdn_net_stat_callback() above.
557 */
558 void
559 isdn_net_dial(void)
560 {
561 isdn_net_dev *p = dev->netdev;
562 int anymore = 0;
563 int i;
564 isdn_ctrl cmd;
565 u_char *phone_number;
566
567 while (p) {
568 isdn_net_local *lp = p->local;
569
570 #ifdef ISDN_DEBUG_NET_DIAL
571 if (lp->dialstate)
572 printk(KERN_DEBUG "%s: dialstate=%d\n", p->dev->name, lp->dialstate);
573 #endif
574 switch (lp->dialstate) {
575 case 0:
576 /* Nothing to do for this interface */
577 break;
578 case 1:
579 /* Initiate dialout. Set phone-number-pointer to first number
580 * of interface.
581 */
582 lp->dial = lp->phone[1];
583 if (!lp->dial) {
584 printk(KERN_WARNING "%s: phone number deleted?\n",
585 p->dev->name);
586 isdn_net_hangup(p->dev);
587 break;
588 }
589 anymore = 1;
590
591 if (lp->dialtimeout > 0)
592 if (lp->dialstarted == 0 || time_after(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait)) {
593 lp->dialstarted = jiffies;
594 lp->dialwait_timer = 0;
595 }
596
597 lp->dialstate++;
598 /* Fall through */
599 case 2:
600 /* Prepare dialing. Clear EAZ, then set EAZ. */
601 cmd.driver = lp->isdn_device;
602 cmd.arg = lp->isdn_channel;
603 cmd.command = ISDN_CMD_CLREAZ;
604 isdn_command(&cmd);
605 sprintf(cmd.parm.num, "%s", isdn_map_eaz2msn(lp->msn, cmd.driver));
606 cmd.command = ISDN_CMD_SETEAZ;
607 isdn_command(&cmd);
608 lp->dialretry = 0;
609 anymore = 1;
610 lp->dialstate++;
611 /* Fall through */
612 case 3:
613 /* Setup interface, dial current phone-number, switch to next number.
614 * If list of phone-numbers is exhausted, increment
615 * retry-counter.
616 */
617 if (dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF)) {
618 char *s;
619 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
620 s = "dial suppressed: isdn system stopped";
621 else
622 s = "dial suppressed: dialmode `off'";
623 isdn_net_unreachable(p->dev, NULL, s);
624 isdn_net_hangup(p->dev);
625 break;
626 }
627 cmd.driver = lp->isdn_device;
628 cmd.command = ISDN_CMD_SETL2;
629 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
630 isdn_command(&cmd);
631 cmd.driver = lp->isdn_device;
632 cmd.command = ISDN_CMD_SETL3;
633 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
634 isdn_command(&cmd);
635 cmd.driver = lp->isdn_device;
636 cmd.arg = lp->isdn_channel;
637 if (!lp->dial) {
638 printk(KERN_WARNING "%s: phone number deleted?\n",
639 p->dev->name);
640 isdn_net_hangup(p->dev);
641 break;
642 }
643 if (!strncmp(lp->dial->num, "LEASED", strlen("LEASED"))) {
644 lp->dialstate = 4;
645 printk(KERN_INFO "%s: Open leased line ...\n", p->dev->name);
646 } else {
647 if (lp->dialtimeout > 0)
648 if (time_after(jiffies, lp->dialstarted + lp->dialtimeout)) {
649 lp->dialwait_timer = jiffies + lp->dialwait;
650 lp->dialstarted = 0;
651 isdn_net_unreachable(p->dev, NULL, "dial: timed out");
652 isdn_net_hangup(p->dev);
653 break;
654 }
655
656 cmd.driver = lp->isdn_device;
657 cmd.command = ISDN_CMD_DIAL;
658 cmd.parm.setup.si2 = 0;
659
660 /* check for DOV */
661 phone_number = lp->dial->num;
662 if ((*phone_number == 'v') ||
663 (*phone_number == 'V')) { /* DOV call */
664 cmd.parm.setup.si1 = 1;
665 } else { /* DATA call */
666 cmd.parm.setup.si1 = 7;
667 }
668
669 strcpy(cmd.parm.setup.phone, phone_number);
670 /*
671 * Switch to next number or back to start if at end of list.
672 */
673 if (!(lp->dial = (isdn_net_phone *) lp->dial->next)) {
674 lp->dial = lp->phone[1];
675 lp->dialretry++;
676
677 if (lp->dialretry > lp->dialmax) {
678 if (lp->dialtimeout == 0) {
679 lp->dialwait_timer = jiffies + lp->dialwait;
680 lp->dialstarted = 0;
681 isdn_net_unreachable(p->dev, NULL, "dial: tried all numbers dialmax times");
682 }
683 isdn_net_hangup(p->dev);
684 break;
685 }
686 }
687 sprintf(cmd.parm.setup.eazmsn, "%s",
688 isdn_map_eaz2msn(lp->msn, cmd.driver));
689 i = isdn_dc2minor(lp->isdn_device, lp->isdn_channel);
690 if (i >= 0) {
691 strcpy(dev->num[i], cmd.parm.setup.phone);
692 dev->usage[i] |= ISDN_USAGE_OUTGOING;
693 isdn_info_update();
694 }
695 printk(KERN_INFO "%s: dialing %d %s... %s\n", p->dev->name,
696 lp->dialretry, cmd.parm.setup.phone,
697 (cmd.parm.setup.si1 == 1) ? "DOV" : "");
698 lp->dtimer = 0;
699 #ifdef ISDN_DEBUG_NET_DIAL
700 printk(KERN_DEBUG "dial: d=%d c=%d\n", lp->isdn_device,
701 lp->isdn_channel);
702 #endif
703 isdn_command(&cmd);
704 }
705 lp->huptimer = 0;
706 lp->outgoing = 1;
707 if (lp->chargeint) {
708 lp->hupflags |= ISDN_HAVECHARGE;
709 lp->hupflags &= ~ISDN_WAITCHARGE;
710 } else {
711 lp->hupflags |= ISDN_WAITCHARGE;
712 lp->hupflags &= ~ISDN_HAVECHARGE;
713 }
714 anymore = 1;
715 lp->dialstate =
716 (lp->cbdelay &&
717 (lp->flags & ISDN_NET_CBOUT)) ? 12 : 4;
718 break;
719 case 4:
720 /* Wait for D-Channel-connect.
721 * If timeout, switch back to state 3.
722 * Dialmax-handling moved to state 3.
723 */
724 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
725 lp->dialstate = 3;
726 anymore = 1;
727 break;
728 case 5:
729 /* Got D-Channel-Connect, send B-Channel-request */
730 cmd.driver = lp->isdn_device;
731 cmd.arg = lp->isdn_channel;
732 cmd.command = ISDN_CMD_ACCEPTB;
733 anymore = 1;
734 lp->dtimer = 0;
735 lp->dialstate++;
736 isdn_command(&cmd);
737 break;
738 case 6:
739 /* Wait for B- or D-Channel-connect. If timeout,
740 * switch back to state 3.
741 */
742 #ifdef ISDN_DEBUG_NET_DIAL
743 printk(KERN_DEBUG "dialtimer2: %d\n", lp->dtimer);
744 #endif
745 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
746 lp->dialstate = 3;
747 anymore = 1;
748 break;
749 case 7:
750 /* Got incoming Call, setup L2 and L3 protocols,
751 * then wait for D-Channel-connect
752 */
753 #ifdef ISDN_DEBUG_NET_DIAL
754 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
755 #endif
756 cmd.driver = lp->isdn_device;
757 cmd.command = ISDN_CMD_SETL2;
758 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
759 isdn_command(&cmd);
760 cmd.driver = lp->isdn_device;
761 cmd.command = ISDN_CMD_SETL3;
762 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
763 isdn_command(&cmd);
764 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT15)
765 isdn_net_hangup(p->dev);
766 else {
767 anymore = 1;
768 lp->dialstate++;
769 }
770 break;
771 case 9:
772 /* Got incoming D-Channel-Connect, send B-Channel-request */
773 cmd.driver = lp->isdn_device;
774 cmd.arg = lp->isdn_channel;
775 cmd.command = ISDN_CMD_ACCEPTB;
776 isdn_command(&cmd);
777 anymore = 1;
778 lp->dtimer = 0;
779 lp->dialstate++;
780 break;
781 case 8:
782 case 10:
783 /* Wait for B- or D-channel-connect */
784 #ifdef ISDN_DEBUG_NET_DIAL
785 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
786 #endif
787 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
788 isdn_net_hangup(p->dev);
789 else
790 anymore = 1;
791 break;
792 case 11:
793 /* Callback Delay */
794 if (lp->dtimer++ > lp->cbdelay)
795 lp->dialstate = 1;
796 anymore = 1;
797 break;
798 case 12:
799 /* Remote does callback. Hangup after cbdelay, then wait for incoming
800 * call (in state 4).
801 */
802 if (lp->dtimer++ > lp->cbdelay)
803 {
804 printk(KERN_INFO "%s: hangup waiting for callback ...\n", p->dev->name);
805 lp->dtimer = 0;
806 lp->dialstate = 4;
807 cmd.driver = lp->isdn_device;
808 cmd.command = ISDN_CMD_HANGUP;
809 cmd.arg = lp->isdn_channel;
810 isdn_command(&cmd);
811 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
812 }
813 anymore = 1;
814 break;
815 default:
816 printk(KERN_WARNING "isdn_net: Illegal dialstate %d for device %s\n",
817 lp->dialstate, p->dev->name);
818 }
819 p = (isdn_net_dev *) p->next;
820 }
821 isdn_timer_ctrl(ISDN_TIMER_NETDIAL, anymore);
822 }
823
824 /*
825 * Perform hangup for a net-interface.
826 */
827 void
828 isdn_net_hangup(struct net_device *d)
829 {
830 isdn_net_local *lp = netdev_priv(d);
831 isdn_ctrl cmd;
832 #ifdef CONFIG_ISDN_X25
833 struct concap_proto *cprot = lp->netdev->cprot;
834 struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
835 #endif
836
837 if (lp->flags & ISDN_NET_CONNECTED) {
838 if (lp->slave != NULL) {
839 isdn_net_local *slp = ISDN_SLAVE_PRIV(lp);
840 if (slp->flags & ISDN_NET_CONNECTED) {
841 printk(KERN_INFO
842 "isdn_net: hang up slave %s before %s\n",
843 lp->slave->name, d->name);
844 isdn_net_hangup(lp->slave);
845 }
846 }
847 printk(KERN_INFO "isdn_net: local hangup %s\n", d->name);
848 #ifdef CONFIG_ISDN_PPP
849 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
850 isdn_ppp_free(lp);
851 #endif
852 isdn_net_lp_disconnected(lp);
853 #ifdef CONFIG_ISDN_X25
854 /* try if there are generic encap protocol
855 receiver routines and signal the closure of
856 the link */
857 if (pops && pops->disconn_ind)
858 pops->disconn_ind(cprot);
859 #endif /* CONFIG_ISDN_X25 */
860
861 cmd.driver = lp->isdn_device;
862 cmd.command = ISDN_CMD_HANGUP;
863 cmd.arg = lp->isdn_channel;
864 isdn_command(&cmd);
865 printk(KERN_INFO "%s: Chargesum is %d\n", d->name, lp->charge);
866 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
867 }
868 isdn_net_unbind_channel(lp);
869 }
870
871 typedef struct {
872 __be16 source;
873 __be16 dest;
874 } ip_ports;
875
876 static void
877 isdn_net_log_skb(struct sk_buff *skb, isdn_net_local *lp)
878 {
879 /* hopefully, this was set correctly */
880 const u_char *p = skb_network_header(skb);
881 unsigned short proto = ntohs(skb->protocol);
882 int data_ofs;
883 ip_ports *ipp;
884 char addinfo[100];
885
886 addinfo[0] = '\0';
887 /* This check stolen from 2.1.72 dev_queue_xmit_nit() */
888 if (p < skb->data || skb_network_header(skb) >= skb_tail_pointer(skb)) {
889 /* fall back to old isdn_net_log_packet method() */
890 char *buf = skb->data;
891
892 printk(KERN_DEBUG "isdn_net: protocol %04x is buggy, dev %s\n", skb->protocol, lp->netdev->dev->name);
893 p = buf;
894 proto = ETH_P_IP;
895 switch (lp->p_encap) {
896 case ISDN_NET_ENCAP_IPTYP:
897 proto = ntohs(*(__be16 *)&buf[0]);
898 p = &buf[2];
899 break;
900 case ISDN_NET_ENCAP_ETHER:
901 proto = ntohs(*(__be16 *)&buf[12]);
902 p = &buf[14];
903 break;
904 case ISDN_NET_ENCAP_CISCOHDLC:
905 proto = ntohs(*(__be16 *)&buf[2]);
906 p = &buf[4];
907 break;
908 #ifdef CONFIG_ISDN_PPP
909 case ISDN_NET_ENCAP_SYNCPPP:
910 proto = ntohs(skb->protocol);
911 p = &buf[IPPP_MAX_HEADER];
912 break;
913 #endif
914 }
915 }
916 data_ofs = ((p[0] & 15) * 4);
917 switch (proto) {
918 case ETH_P_IP:
919 switch (p[9]) {
920 case 1:
921 strcpy(addinfo, " ICMP");
922 break;
923 case 2:
924 strcpy(addinfo, " IGMP");
925 break;
926 case 4:
927 strcpy(addinfo, " IPIP");
928 break;
929 case 6:
930 ipp = (ip_ports *) (&p[data_ofs]);
931 sprintf(addinfo, " TCP, port: %d -> %d", ntohs(ipp->source),
932 ntohs(ipp->dest));
933 break;
934 case 8:
935 strcpy(addinfo, " EGP");
936 break;
937 case 12:
938 strcpy(addinfo, " PUP");
939 break;
940 case 17:
941 ipp = (ip_ports *) (&p[data_ofs]);
942 sprintf(addinfo, " UDP, port: %d -> %d", ntohs(ipp->source),
943 ntohs(ipp->dest));
944 break;
945 case 22:
946 strcpy(addinfo, " IDP");
947 break;
948 }
949 printk(KERN_INFO "OPEN: %pI4 -> %pI4%s\n",
950 p + 12, p + 16, addinfo);
951 break;
952 case ETH_P_ARP:
953 printk(KERN_INFO "OPEN: ARP %pI4 -> *.*.*.* ?%pI4\n",
954 p + 14, p + 24);
955 break;
956 }
957 }
958
959 /*
960 * this function is used to send supervisory data, i.e. data which was
961 * not received from the network layer, but e.g. frames from ipppd, CCP
962 * reset frames etc.
963 */
964 void isdn_net_write_super(isdn_net_local *lp, struct sk_buff *skb)
965 {
966 if (in_irq()) {
967 // we can't grab the lock from irq context,
968 // so we just queue the packet
969 skb_queue_tail(&lp->super_tx_queue, skb);
970 schedule_work(&lp->tqueue);
971 return;
972 }
973
974 spin_lock_bh(&lp->xmit_lock);
975 if (!isdn_net_lp_busy(lp)) {
976 isdn_net_writebuf_skb(lp, skb);
977 } else {
978 skb_queue_tail(&lp->super_tx_queue, skb);
979 }
980 spin_unlock_bh(&lp->xmit_lock);
981 }
982
983 /*
984 * called from tq_immediate
985 */
986 static void isdn_net_softint(struct work_struct *work)
987 {
988 isdn_net_local *lp = container_of(work, isdn_net_local, tqueue);
989 struct sk_buff *skb;
990
991 spin_lock_bh(&lp->xmit_lock);
992 while (!isdn_net_lp_busy(lp)) {
993 skb = skb_dequeue(&lp->super_tx_queue);
994 if (!skb)
995 break;
996 isdn_net_writebuf_skb(lp, skb);
997 }
998 spin_unlock_bh(&lp->xmit_lock);
999 }
1000
1001 /*
1002 * all frames sent from the (net) LL to a HL driver should go via this function
1003 * it's serialized by the caller holding the lp->xmit_lock spinlock
1004 */
1005 void isdn_net_writebuf_skb(isdn_net_local *lp, struct sk_buff *skb)
1006 {
1007 int ret;
1008 int len = skb->len; /* save len */
1009
1010 /* before obtaining the lock the caller should have checked that
1011 the lp isn't busy */
1012 if (isdn_net_lp_busy(lp)) {
1013 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1014 goto error;
1015 }
1016
1017 if (!(lp->flags & ISDN_NET_CONNECTED)) {
1018 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1019 goto error;
1020 }
1021 ret = isdn_writebuf_skb_stub(lp->isdn_device, lp->isdn_channel, 1, skb);
1022 if (ret != len) {
1023 /* we should never get here */
1024 printk(KERN_WARNING "%s: HL driver queue full\n", lp->netdev->dev->name);
1025 goto error;
1026 }
1027
1028 lp->transcount += len;
1029 isdn_net_inc_frame_cnt(lp);
1030 return;
1031
1032 error:
1033 dev_kfree_skb(skb);
1034 lp->stats.tx_errors++;
1035
1036 }
1037
1038
1039 /*
1040 * Helper function for isdn_net_start_xmit.
1041 * When called, the connection is already established.
1042 * Based on cps-calculation, check if device is overloaded.
1043 * If so, and if a slave exists, trigger dialing for it.
1044 * If any slave is online, deliver packets using a simple round robin
1045 * scheme.
1046 *
1047 * Return: 0 on success, !0 on failure.
1048 */
1049
1050 static int
1051 isdn_net_xmit(struct net_device *ndev, struct sk_buff *skb)
1052 {
1053 isdn_net_dev *nd;
1054 isdn_net_local *slp;
1055 isdn_net_local *lp = netdev_priv(ndev);
1056 int retv = NETDEV_TX_OK;
1057
1058 if (((isdn_net_local *) netdev_priv(ndev))->master) {
1059 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1060 dev_kfree_skb(skb);
1061 return NETDEV_TX_OK;
1062 }
1063
1064 /* For the other encaps the header has already been built */
1065 #ifdef CONFIG_ISDN_PPP
1066 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
1067 return isdn_ppp_xmit(skb, ndev);
1068 }
1069 #endif
1070 nd = ((isdn_net_local *) netdev_priv(ndev))->netdev;
1071 lp = isdn_net_get_locked_lp(nd);
1072 if (!lp) {
1073 printk(KERN_WARNING "%s: all channels busy - requeuing!\n", ndev->name);
1074 return NETDEV_TX_BUSY;
1075 }
1076 /* we have our lp locked from now on */
1077
1078 /* Reset hangup-timeout */
1079 lp->huptimer = 0; // FIXME?
1080 isdn_net_writebuf_skb(lp, skb);
1081 spin_unlock_bh(&lp->xmit_lock);
1082
1083 /* the following stuff is here for backwards compatibility.
1084 * in future, start-up and hangup of slaves (based on current load)
1085 * should move to userspace and get based on an overall cps
1086 * calculation
1087 */
1088 if (lp->cps > lp->triggercps) {
1089 if (lp->slave) {
1090 if (!lp->sqfull) {
1091 /* First time overload: set timestamp only */
1092 lp->sqfull = 1;
1093 lp->sqfull_stamp = jiffies;
1094 } else {
1095 /* subsequent overload: if slavedelay exceeded, start dialing */
1096 if (time_after(jiffies, lp->sqfull_stamp + lp->slavedelay)) {
1097 slp = ISDN_SLAVE_PRIV(lp);
1098 if (!(slp->flags & ISDN_NET_CONNECTED)) {
1099 isdn_net_force_dial_lp(ISDN_SLAVE_PRIV(lp));
1100 }
1101 }
1102 }
1103 }
1104 } else {
1105 if (lp->sqfull && time_after(jiffies, lp->sqfull_stamp + lp->slavedelay + (10 * HZ))) {
1106 lp->sqfull = 0;
1107 }
1108 /* this is a hack to allow auto-hangup for slaves on moderate loads */
1109 nd->queue = nd->local;
1110 }
1111
1112 return retv;
1113
1114 }
1115
1116 static void
1117 isdn_net_adjust_hdr(struct sk_buff *skb, struct net_device *dev)
1118 {
1119 isdn_net_local *lp = netdev_priv(dev);
1120 if (!skb)
1121 return;
1122 if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
1123 const int pullsize = skb_network_offset(skb) - ETH_HLEN;
1124 if (pullsize > 0) {
1125 printk(KERN_DEBUG "isdn_net: Pull junk %d\n", pullsize);
1126 skb_pull(skb, pullsize);
1127 }
1128 }
1129 }
1130
1131
1132 static void isdn_net_tx_timeout(struct net_device *ndev)
1133 {
1134 isdn_net_local *lp = netdev_priv(ndev);
1135
1136 printk(KERN_WARNING "isdn_tx_timeout dev %s dialstate %d\n", ndev->name, lp->dialstate);
1137 if (!lp->dialstate) {
1138 lp->stats.tx_errors++;
1139 /*
1140 * There is a certain probability that this currently
1141 * works at all because if we always wake up the interface,
1142 * then upper layer will try to send the next packet
1143 * immediately. And then, the old clean_up logic in the
1144 * driver will hopefully continue to work as it used to do.
1145 *
1146 * This is rather primitive right know, we better should
1147 * clean internal queues here, in particular for multilink and
1148 * ppp, and reset HL driver's channel, too. --HE
1149 *
1150 * actually, this may not matter at all, because ISDN hardware
1151 * should not see transmitter hangs at all IMO
1152 * changed KERN_DEBUG to KERN_WARNING to find out if this is
1153 * ever called --KG
1154 */
1155 }
1156 netif_trans_update(ndev);
1157 netif_wake_queue(ndev);
1158 }
1159
1160 /*
1161 * Try sending a packet.
1162 * If this interface isn't connected to a ISDN-Channel, find a free channel,
1163 * and start dialing.
1164 */
1165 static netdev_tx_t
1166 isdn_net_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1167 {
1168 isdn_net_local *lp = netdev_priv(ndev);
1169 #ifdef CONFIG_ISDN_X25
1170 struct concap_proto *cprot = lp->netdev->cprot;
1171 /* At this point hard_start_xmit() passes control to the encapsulation
1172 protocol (if present).
1173 For X.25 auto-dialing is completly bypassed because:
1174 - It does not conform with the semantics of a reliable datalink
1175 service as needed by X.25 PLP.
1176 - I don't want that the interface starts dialing when the network layer
1177 sends a message which requests to disconnect the lapb link (or if it
1178 sends any other message not resulting in data transmission).
1179 Instead, dialing will be initiated by the encapsulation protocol entity
1180 when a dl_establish request is received from the upper layer.
1181 */
1182 if (cprot && cprot->pops) {
1183 int ret = cprot->pops->encap_and_xmit(cprot, skb);
1184
1185 if (ret)
1186 netif_stop_queue(ndev);
1187 return ret;
1188 } else
1189 #endif
1190 /* auto-dialing xmit function */
1191 {
1192 #ifdef ISDN_DEBUG_NET_DUMP
1193 u_char *buf;
1194 #endif
1195 isdn_net_adjust_hdr(skb, ndev);
1196 #ifdef ISDN_DEBUG_NET_DUMP
1197 buf = skb->data;
1198 isdn_dumppkt("S:", buf, skb->len, 40);
1199 #endif
1200
1201 if (!(lp->flags & ISDN_NET_CONNECTED)) {
1202 int chi;
1203 /* only do autodial if allowed by config */
1204 if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) {
1205 isdn_net_unreachable(ndev, skb, "dial rejected: interface not in dialmode `auto'");
1206 dev_kfree_skb(skb);
1207 return NETDEV_TX_OK;
1208 }
1209 if (lp->phone[1]) {
1210 ulong flags;
1211
1212 if (lp->dialwait_timer <= 0)
1213 if (lp->dialstarted > 0 && lp->dialtimeout > 0 && time_before(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait))
1214 lp->dialwait_timer = lp->dialstarted + lp->dialtimeout + lp->dialwait;
1215
1216 if (lp->dialwait_timer > 0) {
1217 if (time_before(jiffies, lp->dialwait_timer)) {
1218 isdn_net_unreachable(ndev, skb, "dial rejected: retry-time not reached");
1219 dev_kfree_skb(skb);
1220 return NETDEV_TX_OK;
1221 } else
1222 lp->dialwait_timer = 0;
1223 }
1224 /* Grab a free ISDN-Channel */
1225 spin_lock_irqsave(&dev->lock, flags);
1226 if (((chi =
1227 isdn_get_free_channel(
1228 ISDN_USAGE_NET,
1229 lp->l2_proto,
1230 lp->l3_proto,
1231 lp->pre_device,
1232 lp->pre_channel,
1233 lp->msn)
1234 ) < 0) &&
1235 ((chi =
1236 isdn_get_free_channel(
1237 ISDN_USAGE_NET,
1238 lp->l2_proto,
1239 lp->l3_proto,
1240 lp->pre_device,
1241 lp->pre_channel^1,
1242 lp->msn)
1243 ) < 0)) {
1244 spin_unlock_irqrestore(&dev->lock, flags);
1245 isdn_net_unreachable(ndev, skb,
1246 "No channel");
1247 dev_kfree_skb(skb);
1248 return NETDEV_TX_OK;
1249 }
1250 /* Log packet, which triggered dialing */
1251 if (dev->net_verbose)
1252 isdn_net_log_skb(skb, lp);
1253 lp->dialstate = 1;
1254 /* Connect interface with channel */
1255 isdn_net_bind_channel(lp, chi);
1256 #ifdef CONFIG_ISDN_PPP
1257 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
1258 /* no 'first_skb' handling for syncPPP */
1259 if (isdn_ppp_bind(lp) < 0) {
1260 dev_kfree_skb(skb);
1261 isdn_net_unbind_channel(lp);
1262 spin_unlock_irqrestore(&dev->lock, flags);
1263 return NETDEV_TX_OK; /* STN (skb to nirvana) ;) */
1264 }
1265 #ifdef CONFIG_IPPP_FILTER
1266 if (isdn_ppp_autodial_filter(skb, lp)) {
1267 isdn_ppp_free(lp);
1268 isdn_net_unbind_channel(lp);
1269 spin_unlock_irqrestore(&dev->lock, flags);
1270 isdn_net_unreachable(ndev, skb, "dial rejected: packet filtered");
1271 dev_kfree_skb(skb);
1272 return NETDEV_TX_OK;
1273 }
1274 #endif
1275 spin_unlock_irqrestore(&dev->lock, flags);
1276 isdn_net_dial(); /* Initiate dialing */
1277 netif_stop_queue(ndev);
1278 return NETDEV_TX_BUSY; /* let upper layer requeue skb packet */
1279 }
1280 #endif
1281 /* Initiate dialing */
1282 spin_unlock_irqrestore(&dev->lock, flags);
1283 isdn_net_dial();
1284 isdn_net_device_stop_queue(lp);
1285 return NETDEV_TX_BUSY;
1286 } else {
1287 isdn_net_unreachable(ndev, skb,
1288 "No phone number");
1289 dev_kfree_skb(skb);
1290 return NETDEV_TX_OK;
1291 }
1292 } else {
1293 /* Device is connected to an ISDN channel */
1294 netif_trans_update(ndev);
1295 if (!lp->dialstate) {
1296 /* ISDN connection is established, try sending */
1297 int ret;
1298 ret = (isdn_net_xmit(ndev, skb));
1299 if (ret) netif_stop_queue(ndev);
1300 return ret;
1301 } else
1302 netif_stop_queue(ndev);
1303 }
1304 }
1305 return NETDEV_TX_BUSY;
1306 }
1307
1308 /*
1309 * Shutdown a net-interface.
1310 */
1311 static int
1312 isdn_net_close(struct net_device *dev)
1313 {
1314 struct net_device *p;
1315 #ifdef CONFIG_ISDN_X25
1316 struct concap_proto *cprot =
1317 ((isdn_net_local *)netdev_priv(dev))->netdev->cprot;
1318 /* printk(KERN_DEBUG "isdn_net_close %s\n" , dev-> name); */
1319 #endif
1320
1321 #ifdef CONFIG_ISDN_X25
1322 if (cprot && cprot->pops) cprot->pops->close(cprot);
1323 #endif
1324 netif_stop_queue(dev);
1325 p = MASTER_TO_SLAVE(dev);
1326 if (p) {
1327 /* If this interface has slaves, stop them also */
1328 while (p) {
1329 #ifdef CONFIG_ISDN_X25
1330 cprot = ((isdn_net_local *)netdev_priv(p))
1331 ->netdev->cprot;
1332 if (cprot && cprot->pops)
1333 cprot->pops->close(cprot);
1334 #endif
1335 isdn_net_hangup(p);
1336 p = MASTER_TO_SLAVE(p);
1337 }
1338 }
1339 isdn_net_hangup(dev);
1340 isdn_unlock_drivers();
1341 return 0;
1342 }
1343
1344 /*
1345 * Get statistics
1346 */
1347 static struct net_device_stats *
1348 isdn_net_get_stats(struct net_device *dev)
1349 {
1350 isdn_net_local *lp = netdev_priv(dev);
1351 return &lp->stats;
1352 }
1353
1354 /* This is simply a copy from std. eth.c EXCEPT we pull ETH_HLEN
1355 * instead of dev->hard_header_len off. This is done because the
1356 * lowlevel-driver has already pulled off its stuff when we get
1357 * here and this routine only gets called with p_encap == ETHER.
1358 * Determine the packet's protocol ID. The rule here is that we
1359 * assume 802.3 if the type field is short enough to be a length.
1360 * This is normal practice and works for any 'now in use' protocol.
1361 */
1362
1363 static __be16
1364 isdn_net_type_trans(struct sk_buff *skb, struct net_device *dev)
1365 {
1366 struct ethhdr *eth;
1367 unsigned char *rawp;
1368
1369 skb_reset_mac_header(skb);
1370 skb_pull(skb, ETH_HLEN);
1371 eth = eth_hdr(skb);
1372
1373 if (*eth->h_dest & 1) {
1374 if (ether_addr_equal(eth->h_dest, dev->broadcast))
1375 skb->pkt_type = PACKET_BROADCAST;
1376 else
1377 skb->pkt_type = PACKET_MULTICAST;
1378 }
1379 /*
1380 * This ALLMULTI check should be redundant by 1.4
1381 * so don't forget to remove it.
1382 */
1383
1384 else if (dev->flags & (IFF_PROMISC /*| IFF_ALLMULTI*/)) {
1385 if (!ether_addr_equal(eth->h_dest, dev->dev_addr))
1386 skb->pkt_type = PACKET_OTHERHOST;
1387 }
1388 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
1389 return eth->h_proto;
1390
1391 rawp = skb->data;
1392
1393 /*
1394 * This is a magic hack to spot IPX packets. Older Novell breaks
1395 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
1396 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
1397 * won't work for fault tolerant netware but does for the rest.
1398 */
1399 if (*(unsigned short *) rawp == 0xFFFF)
1400 return htons(ETH_P_802_3);
1401 /*
1402 * Real 802.2 LLC
1403 */
1404 return htons(ETH_P_802_2);
1405 }
1406
1407
1408 /*
1409 * CISCO HDLC keepalive specific stuff
1410 */
1411 static struct sk_buff*
1412 isdn_net_ciscohdlck_alloc_skb(isdn_net_local *lp, int len)
1413 {
1414 unsigned short hl = dev->drv[lp->isdn_device]->interface->hl_hdrlen;
1415 struct sk_buff *skb;
1416
1417 skb = alloc_skb(hl + len, GFP_ATOMIC);
1418 if (skb)
1419 skb_reserve(skb, hl);
1420 else
1421 printk("isdn out of mem at %s:%d!\n", __FILE__, __LINE__);
1422 return skb;
1423 }
1424
1425 /* cisco hdlck device private ioctls */
1426 static int
1427 isdn_ciscohdlck_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1428 {
1429 isdn_net_local *lp = netdev_priv(dev);
1430 unsigned long len = 0;
1431 unsigned long expires = 0;
1432 int tmp = 0;
1433 int period = lp->cisco_keepalive_period;
1434 s8 debserint = lp->cisco_debserint;
1435 int rc = 0;
1436
1437 if (lp->p_encap != ISDN_NET_ENCAP_CISCOHDLCK)
1438 return -EINVAL;
1439
1440 switch (cmd) {
1441 /* get/set keepalive period */
1442 case SIOCGKEEPPERIOD:
1443 len = (unsigned long)sizeof(lp->cisco_keepalive_period);
1444 if (copy_to_user(ifr->ifr_data,
1445 &lp->cisco_keepalive_period, len))
1446 rc = -EFAULT;
1447 break;
1448 case SIOCSKEEPPERIOD:
1449 tmp = lp->cisco_keepalive_period;
1450 len = (unsigned long)sizeof(lp->cisco_keepalive_period);
1451 if (copy_from_user(&period, ifr->ifr_data, len))
1452 rc = -EFAULT;
1453 if ((period > 0) && (period <= 32767))
1454 lp->cisco_keepalive_period = period;
1455 else
1456 rc = -EINVAL;
1457 if (!rc && (tmp != lp->cisco_keepalive_period)) {
1458 expires = (unsigned long)(jiffies +
1459 lp->cisco_keepalive_period * HZ);
1460 mod_timer(&lp->cisco_timer, expires);
1461 printk(KERN_INFO "%s: Keepalive period set "
1462 "to %d seconds.\n",
1463 dev->name, lp->cisco_keepalive_period);
1464 }
1465 break;
1466
1467 /* get/set debugging */
1468 case SIOCGDEBSERINT:
1469 len = (unsigned long)sizeof(lp->cisco_debserint);
1470 if (copy_to_user(ifr->ifr_data,
1471 &lp->cisco_debserint, len))
1472 rc = -EFAULT;
1473 break;
1474 case SIOCSDEBSERINT:
1475 len = (unsigned long)sizeof(lp->cisco_debserint);
1476 if (copy_from_user(&debserint,
1477 ifr->ifr_data, len))
1478 rc = -EFAULT;
1479 if ((debserint >= 0) && (debserint <= 64))
1480 lp->cisco_debserint = debserint;
1481 else
1482 rc = -EINVAL;
1483 break;
1484
1485 default:
1486 rc = -EINVAL;
1487 break;
1488 }
1489 return (rc);
1490 }
1491
1492
1493 static int isdn_net_ioctl(struct net_device *dev,
1494 struct ifreq *ifr, int cmd)
1495 {
1496 isdn_net_local *lp = netdev_priv(dev);
1497
1498 switch (lp->p_encap) {
1499 #ifdef CONFIG_ISDN_PPP
1500 case ISDN_NET_ENCAP_SYNCPPP:
1501 return isdn_ppp_dev_ioctl(dev, ifr, cmd);
1502 #endif
1503 case ISDN_NET_ENCAP_CISCOHDLCK:
1504 return isdn_ciscohdlck_dev_ioctl(dev, ifr, cmd);
1505 default:
1506 return -EINVAL;
1507 }
1508 }
1509
1510 /* called via cisco_timer.function */
1511 static void
1512 isdn_net_ciscohdlck_slarp_send_keepalive(struct timer_list *t)
1513 {
1514 isdn_net_local *lp = from_timer(lp, t, cisco_timer);
1515 struct sk_buff *skb;
1516 unsigned char *p;
1517 unsigned long last_cisco_myseq = lp->cisco_myseq;
1518 int myseq_diff = 0;
1519
1520 if (!(lp->flags & ISDN_NET_CONNECTED) || lp->dialstate) {
1521 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1522 return;
1523 }
1524 lp->cisco_myseq++;
1525
1526 myseq_diff = (lp->cisco_myseq - lp->cisco_mineseen);
1527 if ((lp->cisco_line_state) && ((myseq_diff >= 3) || (myseq_diff <= -3))) {
1528 /* line up -> down */
1529 lp->cisco_line_state = 0;
1530 printk(KERN_WARNING
1531 "UPDOWN: Line protocol on Interface %s,"
1532 " changed state to down\n", lp->netdev->dev->name);
1533 /* should stop routing higher-level data across */
1534 } else if ((!lp->cisco_line_state) &&
1535 (myseq_diff >= 0) && (myseq_diff <= 2)) {
1536 /* line down -> up */
1537 lp->cisco_line_state = 1;
1538 printk(KERN_WARNING
1539 "UPDOWN: Line protocol on Interface %s,"
1540 " changed state to up\n", lp->netdev->dev->name);
1541 /* restart routing higher-level data across */
1542 }
1543
1544 if (lp->cisco_debserint)
1545 printk(KERN_DEBUG "%s: HDLC "
1546 "myseq %lu, mineseen %lu%c, yourseen %lu, %s\n",
1547 lp->netdev->dev->name, last_cisco_myseq, lp->cisco_mineseen,
1548 ((last_cisco_myseq == lp->cisco_mineseen) ? '*' : 040),
1549 lp->cisco_yourseq,
1550 ((lp->cisco_line_state) ? "line up" : "line down"));
1551
1552 skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1553 if (!skb)
1554 return;
1555
1556 p = skb_put(skb, 4 + 14);
1557
1558 /* cisco header */
1559 *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
1560 *(u8 *)(p + 1) = CISCO_CTRL;
1561 *(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
1562
1563 /* slarp keepalive */
1564 *(__be32 *)(p + 4) = cpu_to_be32(CISCO_SLARP_KEEPALIVE);
1565 *(__be32 *)(p + 8) = cpu_to_be32(lp->cisco_myseq);
1566 *(__be32 *)(p + 12) = cpu_to_be32(lp->cisco_yourseq);
1567 *(__be16 *)(p + 16) = cpu_to_be16(0xffff); // reliability, always 0xffff
1568 p += 18;
1569
1570 isdn_net_write_super(lp, skb);
1571
1572 lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1573
1574 add_timer(&lp->cisco_timer);
1575 }
1576
1577 static void
1578 isdn_net_ciscohdlck_slarp_send_request(isdn_net_local *lp)
1579 {
1580 struct sk_buff *skb;
1581 unsigned char *p;
1582
1583 skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1584 if (!skb)
1585 return;
1586
1587 p = skb_put(skb, 4 + 14);
1588
1589 /* cisco header */
1590 *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
1591 *(u8 *)(p + 1) = CISCO_CTRL;
1592 *(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
1593
1594 /* slarp request */
1595 *(__be32 *)(p + 4) = cpu_to_be32(CISCO_SLARP_REQUEST);
1596 *(__be32 *)(p + 8) = cpu_to_be32(0); // address
1597 *(__be32 *)(p + 12) = cpu_to_be32(0); // netmask
1598 *(__be16 *)(p + 16) = cpu_to_be16(0); // unused
1599 p += 18;
1600
1601 isdn_net_write_super(lp, skb);
1602 }
1603
1604 static void
1605 isdn_net_ciscohdlck_connected(isdn_net_local *lp)
1606 {
1607 lp->cisco_myseq = 0;
1608 lp->cisco_mineseen = 0;
1609 lp->cisco_yourseq = 0;
1610 lp->cisco_keepalive_period = ISDN_TIMER_KEEPINT;
1611 lp->cisco_last_slarp_in = 0;
1612 lp->cisco_line_state = 0;
1613 lp->cisco_debserint = 0;
1614
1615 /* send slarp request because interface/seq.no.s reset */
1616 isdn_net_ciscohdlck_slarp_send_request(lp);
1617
1618 timer_setup(&lp->cisco_timer,
1619 isdn_net_ciscohdlck_slarp_send_keepalive, 0);
1620 lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1621 add_timer(&lp->cisco_timer);
1622 }
1623
1624 static void
1625 isdn_net_ciscohdlck_disconnected(isdn_net_local *lp)
1626 {
1627 del_timer(&lp->cisco_timer);
1628 }
1629
1630 static void
1631 isdn_net_ciscohdlck_slarp_send_reply(isdn_net_local *lp)
1632 {
1633 struct sk_buff *skb;
1634 unsigned char *p;
1635 struct in_device *in_dev = NULL;
1636 __be32 addr = 0; /* local ipv4 address */
1637 __be32 mask = 0; /* local netmask */
1638
1639 if ((in_dev = lp->netdev->dev->ip_ptr) != NULL) {
1640 /* take primary(first) address of interface */
1641 struct in_ifaddr *ifa = in_dev->ifa_list;
1642 if (ifa != NULL) {
1643 addr = ifa->ifa_local;
1644 mask = ifa->ifa_mask;
1645 }
1646 }
1647
1648 skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1649 if (!skb)
1650 return;
1651
1652 p = skb_put(skb, 4 + 14);
1653
1654 /* cisco header */
1655 *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
1656 *(u8 *)(p + 1) = CISCO_CTRL;
1657 *(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
1658
1659 /* slarp reply, send own ip/netmask; if values are nonsense remote
1660 * should think we are unable to provide it with an address via SLARP */
1661 *(__be32 *)(p + 4) = cpu_to_be32(CISCO_SLARP_REPLY);
1662 *(__be32 *)(p + 8) = addr; // address
1663 *(__be32 *)(p + 12) = mask; // netmask
1664 *(__be16 *)(p + 16) = cpu_to_be16(0); // unused
1665 p += 18;
1666
1667 isdn_net_write_super(lp, skb);
1668 }
1669
1670 static void
1671 isdn_net_ciscohdlck_slarp_in(isdn_net_local *lp, struct sk_buff *skb)
1672 {
1673 unsigned char *p;
1674 int period;
1675 u32 code;
1676 u32 my_seq;
1677 u32 your_seq;
1678 __be32 local;
1679 __be32 *addr, *mask;
1680
1681 if (skb->len < 14)
1682 return;
1683
1684 p = skb->data;
1685 code = be32_to_cpup((__be32 *)p);
1686 p += 4;
1687
1688 switch (code) {
1689 case CISCO_SLARP_REQUEST:
1690 lp->cisco_yourseq = 0;
1691 isdn_net_ciscohdlck_slarp_send_reply(lp);
1692 break;
1693 case CISCO_SLARP_REPLY:
1694 addr = (__be32 *)p;
1695 mask = (__be32 *)(p + 4);
1696 if (*mask != cpu_to_be32(0xfffffffc))
1697 goto slarp_reply_out;
1698 if ((*addr & cpu_to_be32(3)) == cpu_to_be32(0) ||
1699 (*addr & cpu_to_be32(3)) == cpu_to_be32(3))
1700 goto slarp_reply_out;
1701 local = *addr ^ cpu_to_be32(3);
1702 printk(KERN_INFO "%s: got slarp reply: remote ip: %pI4, local ip: %pI4 mask: %pI4\n",
1703 lp->netdev->dev->name, addr, &local, mask);
1704 break;
1705 slarp_reply_out:
1706 printk(KERN_INFO "%s: got invalid slarp reply (%pI4/%pI4) - ignored\n",
1707 lp->netdev->dev->name, addr, mask);
1708 break;
1709 case CISCO_SLARP_KEEPALIVE:
1710 period = (int)((jiffies - lp->cisco_last_slarp_in
1711 + HZ / 2 - 1) / HZ);
1712 if (lp->cisco_debserint &&
1713 (period != lp->cisco_keepalive_period) &&
1714 lp->cisco_last_slarp_in) {
1715 printk(KERN_DEBUG "%s: Keepalive period mismatch - "
1716 "is %d but should be %d.\n",
1717 lp->netdev->dev->name, period,
1718 lp->cisco_keepalive_period);
1719 }
1720 lp->cisco_last_slarp_in = jiffies;
1721 my_seq = be32_to_cpup((__be32 *)(p + 0));
1722 your_seq = be32_to_cpup((__be32 *)(p + 4));
1723 p += 10;
1724 lp->cisco_yourseq = my_seq;
1725 lp->cisco_mineseen = your_seq;
1726 break;
1727 }
1728 }
1729
1730 static void
1731 isdn_net_ciscohdlck_receive(isdn_net_local *lp, struct sk_buff *skb)
1732 {
1733 unsigned char *p;
1734 u8 addr;
1735 u8 ctrl;
1736 u16 type;
1737
1738 if (skb->len < 4)
1739 goto out_free;
1740
1741 p = skb->data;
1742 addr = *(u8 *)(p + 0);
1743 ctrl = *(u8 *)(p + 1);
1744 type = be16_to_cpup((__be16 *)(p + 2));
1745 p += 4;
1746 skb_pull(skb, 4);
1747
1748 if (addr != CISCO_ADDR_UNICAST && addr != CISCO_ADDR_BROADCAST) {
1749 printk(KERN_WARNING "%s: Unknown Cisco addr 0x%02x\n",
1750 lp->netdev->dev->name, addr);
1751 goto out_free;
1752 }
1753 if (ctrl != CISCO_CTRL) {
1754 printk(KERN_WARNING "%s: Unknown Cisco ctrl 0x%02x\n",
1755 lp->netdev->dev->name, ctrl);
1756 goto out_free;
1757 }
1758
1759 switch (type) {
1760 case CISCO_TYPE_SLARP:
1761 isdn_net_ciscohdlck_slarp_in(lp, skb);
1762 goto out_free;
1763 case CISCO_TYPE_CDP:
1764 if (lp->cisco_debserint)
1765 printk(KERN_DEBUG "%s: Received CDP packet. use "
1766 "\"no cdp enable\" on cisco.\n",
1767 lp->netdev->dev->name);
1768 goto out_free;
1769 default:
1770 /* no special cisco protocol */
1771 skb->protocol = htons(type);
1772 netif_rx(skb);
1773 return;
1774 }
1775
1776 out_free:
1777 kfree_skb(skb);
1778 }
1779
1780 /*
1781 * Got a packet from ISDN-Channel.
1782 */
1783 static void
1784 isdn_net_receive(struct net_device *ndev, struct sk_buff *skb)
1785 {
1786 isdn_net_local *lp = netdev_priv(ndev);
1787 isdn_net_local *olp = lp; /* original 'lp' */
1788 #ifdef CONFIG_ISDN_X25
1789 struct concap_proto *cprot = lp->netdev->cprot;
1790 #endif
1791 lp->transcount += skb->len;
1792
1793 lp->stats.rx_packets++;
1794 lp->stats.rx_bytes += skb->len;
1795 if (lp->master) {
1796 /* Bundling: If device is a slave-device, deliver to master, also
1797 * handle master's statistics and hangup-timeout
1798 */
1799 ndev = lp->master;
1800 lp = netdev_priv(ndev);
1801 lp->stats.rx_packets++;
1802 lp->stats.rx_bytes += skb->len;
1803 }
1804 skb->dev = ndev;
1805 skb->pkt_type = PACKET_HOST;
1806 skb_reset_mac_header(skb);
1807 #ifdef ISDN_DEBUG_NET_DUMP
1808 isdn_dumppkt("R:", skb->data, skb->len, 40);
1809 #endif
1810 switch (lp->p_encap) {
1811 case ISDN_NET_ENCAP_ETHER:
1812 /* Ethernet over ISDN */
1813 olp->huptimer = 0;
1814 lp->huptimer = 0;
1815 skb->protocol = isdn_net_type_trans(skb, ndev);
1816 break;
1817 case ISDN_NET_ENCAP_UIHDLC:
1818 /* HDLC with UI-frame (for ispa with -h1 option) */
1819 olp->huptimer = 0;
1820 lp->huptimer = 0;
1821 skb_pull(skb, 2);
1822 /* Fall through */
1823 case ISDN_NET_ENCAP_RAWIP:
1824 /* RAW-IP without MAC-Header */
1825 olp->huptimer = 0;
1826 lp->huptimer = 0;
1827 skb->protocol = htons(ETH_P_IP);
1828 break;
1829 case ISDN_NET_ENCAP_CISCOHDLCK:
1830 isdn_net_ciscohdlck_receive(lp, skb);
1831 return;
1832 case ISDN_NET_ENCAP_CISCOHDLC:
1833 /* CISCO-HDLC IP with type field and fake I-frame-header */
1834 skb_pull(skb, 2);
1835 /* Fall through */
1836 case ISDN_NET_ENCAP_IPTYP:
1837 /* IP with type field */
1838 olp->huptimer = 0;
1839 lp->huptimer = 0;
1840 skb->protocol = *(__be16 *)&(skb->data[0]);
1841 skb_pull(skb, 2);
1842 if (*(unsigned short *) skb->data == 0xFFFF)
1843 skb->protocol = htons(ETH_P_802_3);
1844 break;
1845 #ifdef CONFIG_ISDN_PPP
1846 case ISDN_NET_ENCAP_SYNCPPP:
1847 /* huptimer is done in isdn_ppp_push_higher */
1848 isdn_ppp_receive(lp->netdev, olp, skb);
1849 return;
1850 #endif
1851
1852 default:
1853 #ifdef CONFIG_ISDN_X25
1854 /* try if there are generic sync_device receiver routines */
1855 if (cprot) if (cprot->pops)
1856 if (cprot->pops->data_ind) {
1857 cprot->pops->data_ind(cprot, skb);
1858 return;
1859 };
1860 #endif /* CONFIG_ISDN_X25 */
1861 printk(KERN_WARNING "%s: unknown encapsulation, dropping\n",
1862 lp->netdev->dev->name);
1863 kfree_skb(skb);
1864 return;
1865 }
1866
1867 netif_rx(skb);
1868 return;
1869 }
1870
1871 /*
1872 * A packet arrived via ISDN. Search interface-chain for a corresponding
1873 * interface. If found, deliver packet to receiver-function and return 1,
1874 * else return 0.
1875 */
1876 int
1877 isdn_net_rcv_skb(int idx, struct sk_buff *skb)
1878 {
1879 isdn_net_dev *p = dev->rx_netdev[idx];
1880
1881 if (p) {
1882 isdn_net_local *lp = p->local;
1883 if ((lp->flags & ISDN_NET_CONNECTED) &&
1884 (!lp->dialstate)) {
1885 isdn_net_receive(p->dev, skb);
1886 return 1;
1887 }
1888 }
1889 return 0;
1890 }
1891
1892 /*
1893 * build an header
1894 * depends on encaps that is being used.
1895 */
1896
1897 static int isdn_net_header(struct sk_buff *skb, struct net_device *dev,
1898 unsigned short type,
1899 const void *daddr, const void *saddr, unsigned plen)
1900 {
1901 isdn_net_local *lp = netdev_priv(dev);
1902 unsigned char *p;
1903 int len = 0;
1904
1905 switch (lp->p_encap) {
1906 case ISDN_NET_ENCAP_ETHER:
1907 len = eth_header(skb, dev, type, daddr, saddr, plen);
1908 break;
1909 #ifdef CONFIG_ISDN_PPP
1910 case ISDN_NET_ENCAP_SYNCPPP:
1911 /* stick on a fake header to keep fragmentation code happy. */
1912 len = IPPP_MAX_HEADER;
1913 skb_push(skb, len);
1914 break;
1915 #endif
1916 case ISDN_NET_ENCAP_RAWIP:
1917 printk(KERN_WARNING "isdn_net_header called with RAW_IP!\n");
1918 len = 0;
1919 break;
1920 case ISDN_NET_ENCAP_IPTYP:
1921 /* ethernet type field */
1922 *((__be16 *)skb_push(skb, 2)) = htons(type);
1923 len = 2;
1924 break;
1925 case ISDN_NET_ENCAP_UIHDLC:
1926 /* HDLC with UI-Frames (for ispa with -h1 option) */
1927 *((__be16 *)skb_push(skb, 2)) = htons(0x0103);
1928 len = 2;
1929 break;
1930 case ISDN_NET_ENCAP_CISCOHDLC:
1931 case ISDN_NET_ENCAP_CISCOHDLCK:
1932 p = skb_push(skb, 4);
1933 *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
1934 *(u8 *)(p + 1) = CISCO_CTRL;
1935 *(__be16 *)(p + 2) = cpu_to_be16(type);
1936 p += 4;
1937 len = 4;
1938 break;
1939 #ifdef CONFIG_ISDN_X25
1940 default:
1941 /* try if there are generic concap protocol routines */
1942 if (lp->netdev->cprot) {
1943 printk(KERN_WARNING "isdn_net_header called with concap_proto!\n");
1944 len = 0;
1945 break;
1946 }
1947 break;
1948 #endif /* CONFIG_ISDN_X25 */
1949 }
1950 return len;
1951 }
1952
1953 static int isdn_header_cache(const struct neighbour *neigh, struct hh_cache *hh,
1954 __be16 type)
1955 {
1956 const struct net_device *dev = neigh->dev;
1957 isdn_net_local *lp = netdev_priv(dev);
1958
1959 if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
1960 return eth_header_cache(neigh, hh, type);
1961 return -1;
1962 }
1963
1964 static void isdn_header_cache_update(struct hh_cache *hh,
1965 const struct net_device *dev,
1966 const unsigned char *haddr)
1967 {
1968 isdn_net_local *lp = netdev_priv(dev);
1969 if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
1970 eth_header_cache_update(hh, dev, haddr);
1971 }
1972
1973 static const struct header_ops isdn_header_ops = {
1974 .create = isdn_net_header,
1975 .cache = isdn_header_cache,
1976 .cache_update = isdn_header_cache_update,
1977 };
1978
1979 /*
1980 * Interface-setup. (just after registering a new interface)
1981 */
1982 static int
1983 isdn_net_init(struct net_device *ndev)
1984 {
1985 ushort max_hlhdr_len = 0;
1986 int drvidx;
1987
1988 /*
1989 * up till binding we ask the protocol layer to reserve as much
1990 * as we might need for HL layer
1991 */
1992
1993 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
1994 if (dev->drv[drvidx])
1995 if (max_hlhdr_len < dev->drv[drvidx]->interface->hl_hdrlen)
1996 max_hlhdr_len = dev->drv[drvidx]->interface->hl_hdrlen;
1997
1998 ndev->hard_header_len = ETH_HLEN + max_hlhdr_len;
1999 return 0;
2000 }
2001
2002 static void
2003 isdn_net_swapbind(int drvidx)
2004 {
2005 isdn_net_dev *p;
2006
2007 #ifdef ISDN_DEBUG_NET_ICALL
2008 printk(KERN_DEBUG "n_fi: swapping ch of %d\n", drvidx);
2009 #endif
2010 p = dev->netdev;
2011 while (p) {
2012 if (p->local->pre_device == drvidx)
2013 switch (p->local->pre_channel) {
2014 case 0:
2015 p->local->pre_channel = 1;
2016 break;
2017 case 1:
2018 p->local->pre_channel = 0;
2019 break;
2020 }
2021 p = (isdn_net_dev *) p->next;
2022 }
2023 }
2024
2025 static void
2026 isdn_net_swap_usage(int i1, int i2)
2027 {
2028 int u1 = dev->usage[i1] & ISDN_USAGE_EXCLUSIVE;
2029 int u2 = dev->usage[i2] & ISDN_USAGE_EXCLUSIVE;
2030
2031 #ifdef ISDN_DEBUG_NET_ICALL
2032 printk(KERN_DEBUG "n_fi: usage of %d and %d\n", i1, i2);
2033 #endif
2034 dev->usage[i1] &= ~ISDN_USAGE_EXCLUSIVE;
2035 dev->usage[i1] |= u2;
2036 dev->usage[i2] &= ~ISDN_USAGE_EXCLUSIVE;
2037 dev->usage[i2] |= u1;
2038 isdn_info_update();
2039 }
2040
2041 /*
2042 * An incoming call-request has arrived.
2043 * Search the interface-chain for an appropriate interface.
2044 * If found, connect the interface to the ISDN-channel and initiate
2045 * D- and B-Channel-setup. If secure-flag is set, accept only
2046 * configured phone-numbers. If callback-flag is set, initiate
2047 * callback-dialing.
2048 *
2049 * Return-Value: 0 = No appropriate interface for this call.
2050 * 1 = Call accepted
2051 * 2 = Reject call, wait cbdelay, then call back
2052 * 3 = Reject call
2053 * 4 = Wait cbdelay, then call back
2054 * 5 = No appropriate interface for this call,
2055 * would eventually match if CID was longer.
2056 */
2057
2058 int
2059 isdn_net_find_icall(int di, int ch, int idx, setup_parm *setup)
2060 {
2061 char *eaz;
2062 int si1;
2063 int si2;
2064 int ematch;
2065 int wret;
2066 int swapped;
2067 int sidx = 0;
2068 u_long flags;
2069 isdn_net_dev *p;
2070 isdn_net_phone *n;
2071 char nr[ISDN_MSNLEN];
2072 char *my_eaz;
2073
2074 /* Search name in netdev-chain */
2075 if (!setup->phone[0]) {
2076 nr[0] = '0';
2077 nr[1] = '\0';
2078 printk(KERN_INFO "isdn_net: Incoming call without OAD, assuming '0'\n");
2079 } else
2080 strlcpy(nr, setup->phone, ISDN_MSNLEN);
2081 si1 = (int) setup->si1;
2082 si2 = (int) setup->si2;
2083 if (!setup->eazmsn[0]) {
2084 printk(KERN_WARNING "isdn_net: Incoming call without CPN, assuming '0'\n");
2085 eaz = "0";
2086 } else
2087 eaz = setup->eazmsn;
2088 if (dev->net_verbose > 1)
2089 printk(KERN_INFO "isdn_net: call from %s,%d,%d -> %s\n", nr, si1, si2, eaz);
2090 /* Accept DATA and VOICE calls at this stage
2091 * local eaz is checked later for allowed call types
2092 */
2093 if ((si1 != 7) && (si1 != 1)) {
2094 if (dev->net_verbose > 1)
2095 printk(KERN_INFO "isdn_net: Service-Indicator not 1 or 7, ignored\n");
2096 return 0;
2097 }
2098 n = (isdn_net_phone *) 0;
2099 p = dev->netdev;
2100 ematch = wret = swapped = 0;
2101 #ifdef ISDN_DEBUG_NET_ICALL
2102 printk(KERN_DEBUG "n_fi: di=%d ch=%d idx=%d usg=%d\n", di, ch, idx,
2103 dev->usage[idx]);
2104 #endif
2105 while (p) {
2106 int matchret;
2107 isdn_net_local *lp = p->local;
2108
2109 /* If last check has triggered as binding-swap, revert it */
2110 switch (swapped) {
2111 case 2:
2112 isdn_net_swap_usage(idx, sidx);
2113 /* fall through */
2114 case 1:
2115 isdn_net_swapbind(di);
2116 break;
2117 }
2118 swapped = 0;
2119 /* check acceptable call types for DOV */
2120 my_eaz = isdn_map_eaz2msn(lp->msn, di);
2121 if (si1 == 1) { /* it's a DOV call, check if we allow it */
2122 if (*my_eaz == 'v' || *my_eaz == 'V' ||
2123 *my_eaz == 'b' || *my_eaz == 'B')
2124 my_eaz++; /* skip to allow a match */
2125 else
2126 my_eaz = NULL; /* force non match */
2127 } else { /* it's a DATA call, check if we allow it */
2128 if (*my_eaz == 'b' || *my_eaz == 'B')
2129 my_eaz++; /* skip to allow a match */
2130 }
2131 if (my_eaz)
2132 matchret = isdn_msncmp(eaz, my_eaz);
2133 else
2134 matchret = 1;
2135 if (!matchret)
2136 ematch = 1;
2137
2138 /* Remember if more numbers eventually can match */
2139 if (matchret > wret)
2140 wret = matchret;
2141 #ifdef ISDN_DEBUG_NET_ICALL
2142 printk(KERN_DEBUG "n_fi: if='%s', l.msn=%s, l.flags=%d, l.dstate=%d\n",
2143 p->dev->name, lp->msn, lp->flags, lp->dialstate);
2144 #endif
2145 if ((!matchret) && /* EAZ is matching */
2146 (((!(lp->flags & ISDN_NET_CONNECTED)) && /* but not connected */
2147 (USG_NONE(dev->usage[idx]))) || /* and ch. unused or */
2148 ((((lp->dialstate == 4) || (lp->dialstate == 12)) && /* if dialing */
2149 (!(lp->flags & ISDN_NET_CALLBACK))) /* but no callback */
2150 )))
2151 {
2152 #ifdef ISDN_DEBUG_NET_ICALL
2153 printk(KERN_DEBUG "n_fi: match1, pdev=%d pch=%d\n",
2154 lp->pre_device, lp->pre_channel);
2155 #endif
2156 if (dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) {
2157 if ((lp->pre_channel != ch) ||
2158 (lp->pre_device != di)) {
2159 /* Here we got a problem:
2160 * If using an ICN-Card, an incoming call is always signaled on
2161 * on the first channel of the card, if both channels are
2162 * down. However this channel may be bound exclusive. If the
2163 * second channel is free, this call should be accepted.
2164 * The solution is horribly but it runs, so what:
2165 * We exchange the exclusive bindings of the two channels, the
2166 * corresponding variables in the interface-structs.
2167 */
2168 if (ch == 0) {
2169 sidx = isdn_dc2minor(di, 1);
2170 #ifdef ISDN_DEBUG_NET_ICALL
2171 printk(KERN_DEBUG "n_fi: ch is 0\n");
2172 #endif
2173 if (USG_NONE(dev->usage[sidx])) {
2174 /* Second Channel is free, now see if it is bound
2175 * exclusive too. */
2176 if (dev->usage[sidx] & ISDN_USAGE_EXCLUSIVE) {
2177 #ifdef ISDN_DEBUG_NET_ICALL
2178 printk(KERN_DEBUG "n_fi: 2nd channel is down and bound\n");
2179 #endif
2180 /* Yes, swap bindings only, if the original
2181 * binding is bound to channel 1 of this driver */
2182 if ((lp->pre_device == di) &&
2183 (lp->pre_channel == 1)) {
2184 isdn_net_swapbind(di);
2185 swapped = 1;
2186 } else {
2187 /* ... else iterate next device */
2188 p = (isdn_net_dev *) p->next;
2189 continue;
2190 }
2191 } else {
2192 #ifdef ISDN_DEBUG_NET_ICALL
2193 printk(KERN_DEBUG "n_fi: 2nd channel is down and unbound\n");
2194 #endif
2195 /* No, swap always and swap excl-usage also */
2196 isdn_net_swap_usage(idx, sidx);
2197 isdn_net_swapbind(di);
2198 swapped = 2;
2199 }
2200 /* Now check for exclusive binding again */
2201 #ifdef ISDN_DEBUG_NET_ICALL
2202 printk(KERN_DEBUG "n_fi: final check\n");
2203 #endif
2204 if ((dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) &&
2205 ((lp->pre_channel != ch) ||
2206 (lp->pre_device != di))) {
2207 #ifdef ISDN_DEBUG_NET_ICALL
2208 printk(KERN_DEBUG "n_fi: final check failed\n");
2209 #endif
2210 p = (isdn_net_dev *) p->next;
2211 continue;
2212 }
2213 }
2214 } else {
2215 /* We are already on the second channel, so nothing to do */
2216 #ifdef ISDN_DEBUG_NET_ICALL
2217 printk(KERN_DEBUG "n_fi: already on 2nd channel\n");
2218 #endif
2219 }
2220 }
2221 }
2222 #ifdef ISDN_DEBUG_NET_ICALL
2223 printk(KERN_DEBUG "n_fi: match2\n");
2224 #endif
2225 n = lp->phone[0];
2226 if (lp->flags & ISDN_NET_SECURE) {
2227 while (n) {
2228 if (!isdn_msncmp(nr, n->num))
2229 break;
2230 n = (isdn_net_phone *) n->next;
2231 }
2232 }
2233 if (n || (!(lp->flags & ISDN_NET_SECURE))) {
2234 #ifdef ISDN_DEBUG_NET_ICALL
2235 printk(KERN_DEBUG "n_fi: match3\n");
2236 #endif
2237 /* matching interface found */
2238
2239 /*
2240 * Is the state STOPPED?
2241 * If so, no dialin is allowed,
2242 * so reject actively.
2243 * */
2244 if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2245 printk(KERN_INFO "incoming call, interface %s `stopped' -> rejected\n",
2246 p->dev->name);
2247 return 3;
2248 }
2249 /*
2250 * Is the interface up?
2251 * If not, reject the call actively.
2252 */
2253 if (!isdn_net_device_started(p)) {
2254 printk(KERN_INFO "%s: incoming call, interface down -> rejected\n",
2255 p->dev->name);
2256 return 3;
2257 }
2258 /* Interface is up, now see if it's a slave. If so, see if
2259 * it's master and parent slave is online. If not, reject the call.
2260 */
2261 if (lp->master) {
2262 isdn_net_local *mlp = ISDN_MASTER_PRIV(lp);
2263 printk(KERN_DEBUG "ICALLslv: %s\n", p->dev->name);
2264 printk(KERN_DEBUG "master=%s\n", lp->master->name);
2265 if (mlp->flags & ISDN_NET_CONNECTED) {
2266 printk(KERN_DEBUG "master online\n");
2267 /* Master is online, find parent-slave (master if first slave) */
2268 while (mlp->slave) {
2269 if (ISDN_SLAVE_PRIV(mlp) == lp)
2270 break;
2271 mlp = ISDN_SLAVE_PRIV(mlp);
2272 }
2273 } else
2274 printk(KERN_DEBUG "master offline\n");
2275 /* Found parent, if it's offline iterate next device */
2276 printk(KERN_DEBUG "mlpf: %d\n", mlp->flags & ISDN_NET_CONNECTED);
2277 if (!(mlp->flags & ISDN_NET_CONNECTED)) {
2278 p = (isdn_net_dev *) p->next;
2279 continue;
2280 }
2281 }
2282 if (lp->flags & ISDN_NET_CALLBACK) {
2283 int chi;
2284 /*
2285 * Is the state MANUAL?
2286 * If so, no callback can be made,
2287 * so reject actively.
2288 * */
2289 if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2290 printk(KERN_INFO "incoming call for callback, interface %s `off' -> rejected\n",
2291 p->dev->name);
2292 return 3;
2293 }
2294 printk(KERN_DEBUG "%s: call from %s -> %s, start callback\n",
2295 p->dev->name, nr, eaz);
2296 if (lp->phone[1]) {
2297 /* Grab a free ISDN-Channel */
2298 spin_lock_irqsave(&dev->lock, flags);
2299 if ((chi =
2300 isdn_get_free_channel(
2301 ISDN_USAGE_NET,
2302 lp->l2_proto,
2303 lp->l3_proto,
2304 lp->pre_device,
2305 lp->pre_channel,
2306 lp->msn)
2307 ) < 0) {
2308
2309 printk(KERN_WARNING "isdn_net_find_icall: No channel for %s\n",
2310 p->dev->name);
2311 spin_unlock_irqrestore(&dev->lock, flags);
2312 return 0;
2313 }
2314 /* Setup dialstate. */
2315 lp->dtimer = 0;
2316 lp->dialstate = 11;
2317 /* Connect interface with channel */
2318 isdn_net_bind_channel(lp, chi);
2319 #ifdef CONFIG_ISDN_PPP
2320 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2321 if (isdn_ppp_bind(lp) < 0) {
2322 spin_unlock_irqrestore(&dev->lock, flags);
2323 isdn_net_unbind_channel(lp);
2324 return 0;
2325 }
2326 #endif
2327 spin_unlock_irqrestore(&dev->lock, flags);
2328 /* Initiate dialing by returning 2 or 4 */
2329 return (lp->flags & ISDN_NET_CBHUP) ? 2 : 4;
2330 } else
2331 printk(KERN_WARNING "isdn_net: %s: No phone number\n",
2332 p->dev->name);
2333 return 0;
2334 } else {
2335 printk(KERN_DEBUG "%s: call from %s -> %s accepted\n",
2336 p->dev->name, nr, eaz);
2337 /* if this interface is dialing, it does it probably on a different
2338 device, so free this device */
2339 if ((lp->dialstate == 4) || (lp->dialstate == 12)) {
2340 #ifdef CONFIG_ISDN_PPP
2341 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2342 isdn_ppp_free(lp);
2343 #endif
2344 isdn_net_lp_disconnected(lp);
2345 isdn_free_channel(lp->isdn_device, lp->isdn_channel,
2346 ISDN_USAGE_NET);
2347 }
2348 spin_lock_irqsave(&dev->lock, flags);
2349 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2350 dev->usage[idx] |= ISDN_USAGE_NET;
2351 strcpy(dev->num[idx], nr);
2352 isdn_info_update();
2353 dev->st_netdev[idx] = lp->netdev;
2354 lp->isdn_device = di;
2355 lp->isdn_channel = ch;
2356 lp->ppp_slot = -1;
2357 lp->flags |= ISDN_NET_CONNECTED;
2358 lp->dialstate = 7;
2359 lp->dtimer = 0;
2360 lp->outgoing = 0;
2361 lp->huptimer = 0;
2362 lp->hupflags |= ISDN_WAITCHARGE;
2363 lp->hupflags &= ~ISDN_HAVECHARGE;
2364 #ifdef CONFIG_ISDN_PPP
2365 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
2366 if (isdn_ppp_bind(lp) < 0) {
2367 isdn_net_unbind_channel(lp);
2368 spin_unlock_irqrestore(&dev->lock, flags);
2369 return 0;
2370 }
2371 }
2372 #endif
2373 spin_unlock_irqrestore(&dev->lock, flags);
2374 return 1;
2375 }
2376 }
2377 }
2378 p = (isdn_net_dev *) p->next;
2379 }
2380 /* If none of configured EAZ/MSN matched and not verbose, be silent */
2381 if (!ematch || dev->net_verbose)
2382 printk(KERN_INFO "isdn_net: call from %s -> %d %s ignored\n", nr, di, eaz);
2383 return (wret == 2) ? 5 : 0;
2384 }
2385
2386 /*
2387 * Search list of net-interfaces for an interface with given name.
2388 */
2389 isdn_net_dev *
2390 isdn_net_findif(char *name)
2391 {
2392 isdn_net_dev *p = dev->netdev;
2393
2394 while (p) {
2395 if (!strcmp(p->dev->name, name))
2396 return p;
2397 p = (isdn_net_dev *) p->next;
2398 }
2399 return (isdn_net_dev *) NULL;
2400 }
2401
2402 /*
2403 * Force a net-interface to dial out.
2404 * This is called from the userlevel-routine below or
2405 * from isdn_net_start_xmit().
2406 */
2407 static int
2408 isdn_net_force_dial_lp(isdn_net_local *lp)
2409 {
2410 if ((!(lp->flags & ISDN_NET_CONNECTED)) && !lp->dialstate) {
2411 int chi;
2412 if (lp->phone[1]) {
2413 ulong flags;
2414
2415 /* Grab a free ISDN-Channel */
2416 spin_lock_irqsave(&dev->lock, flags);
2417 if ((chi = isdn_get_free_channel(
2418 ISDN_USAGE_NET,
2419 lp->l2_proto,
2420 lp->l3_proto,
2421 lp->pre_device,
2422 lp->pre_channel,
2423 lp->msn)) < 0) {
2424 printk(KERN_WARNING "isdn_net_force_dial: No channel for %s\n",
2425 lp->netdev->dev->name);
2426 spin_unlock_irqrestore(&dev->lock, flags);
2427 return -EAGAIN;
2428 }
2429 lp->dialstate = 1;
2430 /* Connect interface with channel */
2431 isdn_net_bind_channel(lp, chi);
2432 #ifdef CONFIG_ISDN_PPP
2433 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2434 if (isdn_ppp_bind(lp) < 0) {
2435 isdn_net_unbind_channel(lp);
2436 spin_unlock_irqrestore(&dev->lock, flags);
2437 return -EAGAIN;
2438 }
2439 #endif
2440 /* Initiate dialing */
2441 spin_unlock_irqrestore(&dev->lock, flags);
2442 isdn_net_dial();
2443 return 0;
2444 } else
2445 return -EINVAL;
2446 } else
2447 return -EBUSY;
2448 }
2449
2450 /*
2451 * This is called from certain upper protocol layers (multilink ppp
2452 * and x25iface encapsulation module) that want to initiate dialing
2453 * themselves.
2454 */
2455 int
2456 isdn_net_dial_req(isdn_net_local *lp)
2457 {
2458 /* is there a better error code? */
2459 if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) return -EBUSY;
2460
2461 return isdn_net_force_dial_lp(lp);
2462 }
2463
2464 /*
2465 * Force a net-interface to dial out.
2466 * This is always called from within userspace (ISDN_IOCTL_NET_DIAL).
2467 */
2468 int
2469 isdn_net_force_dial(char *name)
2470 {
2471 isdn_net_dev *p = isdn_net_findif(name);
2472
2473 if (!p)
2474 return -ENODEV;
2475 return (isdn_net_force_dial_lp(p->local));
2476 }
2477
2478 /* The ISDN-specific entries in the device structure. */
2479 static const struct net_device_ops isdn_netdev_ops = {
2480 .ndo_init = isdn_net_init,
2481 .ndo_open = isdn_net_open,
2482 .ndo_stop = isdn_net_close,
2483 .ndo_do_ioctl = isdn_net_ioctl,
2484
2485 .ndo_start_xmit = isdn_net_start_xmit,
2486 .ndo_get_stats = isdn_net_get_stats,
2487 .ndo_tx_timeout = isdn_net_tx_timeout,
2488 };
2489
2490 /*
2491 * Helper for alloc_netdev()
2492 */
2493 static void _isdn_setup(struct net_device *dev)
2494 {
2495 isdn_net_local *lp = netdev_priv(dev);
2496
2497 ether_setup(dev);
2498
2499 /* Setup the generic properties */
2500 dev->flags = IFF_NOARP | IFF_POINTOPOINT;
2501
2502 /* isdn prepends a header in the tx path, can't share skbs */
2503 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
2504 dev->header_ops = NULL;
2505 dev->netdev_ops = &isdn_netdev_ops;
2506
2507 /* for clients with MPPP maybe higher values better */
2508 dev->tx_queue_len = 30;
2509
2510 lp->p_encap = ISDN_NET_ENCAP_RAWIP;
2511 lp->magic = ISDN_NET_MAGIC;
2512 lp->last = lp;
2513 lp->next = lp;
2514 lp->isdn_device = -1;
2515 lp->isdn_channel = -1;
2516 lp->pre_device = -1;
2517 lp->pre_channel = -1;
2518 lp->exclusive = -1;
2519 lp->ppp_slot = -1;
2520 lp->pppbind = -1;
2521 skb_queue_head_init(&lp->super_tx_queue);
2522 lp->l2_proto = ISDN_PROTO_L2_X75I;
2523 lp->l3_proto = ISDN_PROTO_L3_TRANS;
2524 lp->triggercps = 6000;
2525 lp->slavedelay = 10 * HZ;
2526 lp->hupflags = ISDN_INHUP; /* Do hangup even on incoming calls */
2527 lp->onhtime = 10; /* Default hangup-time for saving costs */
2528 lp->dialmax = 1;
2529 /* Hangup before Callback, manual dial */
2530 lp->flags = ISDN_NET_CBHUP | ISDN_NET_DM_MANUAL;
2531 lp->cbdelay = 25; /* Wait 5 secs before Callback */
2532 lp->dialtimeout = -1; /* Infinite Dial-Timeout */
2533 lp->dialwait = 5 * HZ; /* Wait 5 sec. after failed dial */
2534 lp->dialstarted = 0; /* Jiffies of last dial-start */
2535 lp->dialwait_timer = 0; /* Jiffies of earliest next dial-start */
2536 }
2537
2538 /*
2539 * Allocate a new network-interface and initialize its data structures.
2540 */
2541 char *
2542 isdn_net_new(char *name, struct net_device *master)
2543 {
2544 isdn_net_dev *netdev;
2545
2546 /* Avoid creating an existing interface */
2547 if (isdn_net_findif(name)) {
2548 printk(KERN_WARNING "isdn_net: interface %s already exists\n", name);
2549 return NULL;
2550 }
2551 if (name == NULL)
2552 return NULL;
2553 if (!(netdev = kzalloc(sizeof(isdn_net_dev), GFP_KERNEL))) {
2554 printk(KERN_WARNING "isdn_net: Could not allocate net-device\n");
2555 return NULL;
2556 }
2557 netdev->dev = alloc_netdev(sizeof(isdn_net_local), name,
2558 NET_NAME_UNKNOWN, _isdn_setup);
2559 if (!netdev->dev) {
2560 printk(KERN_WARNING "isdn_net: Could not allocate network device\n");
2561 kfree(netdev);
2562 return NULL;
2563 }
2564 netdev->local = netdev_priv(netdev->dev);
2565
2566 if (master) {
2567 /* Device shall be a slave */
2568 struct net_device *p = MASTER_TO_SLAVE(master);
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 = MASTER_TO_SLAVE(p);
2576 }
2577 MASTER_TO_SLAVE(q) = netdev->dev;
2578 } else {
2579 /* Device shall be a master */
2580 /*
2581 * Watchdog timer (currently) for master only.
2582 */
2583 netdev->dev->watchdog_timeo = ISDN_NET_TX_TIMEOUT;
2584 if (register_netdev(netdev->dev) != 0) {
2585 printk(KERN_WARNING "isdn_net: Could not register net-device\n");
2586 free_netdev(netdev->dev);
2587 kfree(netdev);
2588 return NULL;
2589 }
2590 }
2591 netdev->queue = netdev->local;
2592 spin_lock_init(&netdev->queue_lock);
2593
2594 netdev->local->netdev = netdev;
2595
2596 INIT_WORK(&netdev->local->tqueue, isdn_net_softint);
2597 spin_lock_init(&netdev->local->xmit_lock);
2598
2599 /* Put into to netdev-chain */
2600 netdev->next = (void *) dev->netdev;
2601 dev->netdev = netdev;
2602 return netdev->dev->name;
2603 }
2604
2605 char *
2606 isdn_net_newslave(char *parm)
2607 {
2608 char *p = strchr(parm, ',');
2609 isdn_net_dev *n;
2610 char newname[10];
2611
2612 if (p) {
2613 /* Slave-Name MUST not be empty or overflow 'newname' */
2614 if (strscpy(newname, p + 1, sizeof(newname)) <= 0)
2615 return NULL;
2616 *p = 0;
2617 /* Master must already exist */
2618 if (!(n = isdn_net_findif(parm)))
2619 return NULL;
2620 /* Master must be a real interface, not a slave */
2621 if (n->local->master)
2622 return NULL;
2623 /* Master must not be started yet */
2624 if (isdn_net_device_started(n))
2625 return NULL;
2626 return (isdn_net_new(newname, n->dev));
2627 }
2628 return NULL;
2629 }
2630
2631 /*
2632 * Set interface-parameters.
2633 * Always set all parameters, so the user-level application is responsible
2634 * for not overwriting existing setups. It has to get the current
2635 * setup first, if only selected parameters are to be changed.
2636 */
2637 int
2638 isdn_net_setcfg(isdn_net_ioctl_cfg *cfg)
2639 {
2640 isdn_net_dev *p = isdn_net_findif(cfg->name);
2641 ulong features;
2642 int i;
2643 int drvidx;
2644 int chidx;
2645 char drvid[25];
2646
2647 if (p) {
2648 isdn_net_local *lp = p->local;
2649
2650 /* See if any registered driver supports the features we want */
2651 features = ((1 << cfg->l2_proto) << ISDN_FEATURE_L2_SHIFT) |
2652 ((1 << cfg->l3_proto) << ISDN_FEATURE_L3_SHIFT);
2653 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2654 if (dev->drv[i])
2655 if ((dev->drv[i]->interface->features & features) == features)
2656 break;
2657 if (i == ISDN_MAX_DRIVERS) {
2658 printk(KERN_WARNING "isdn_net: No driver with selected features\n");
2659 return -ENODEV;
2660 }
2661 if (lp->p_encap != cfg->p_encap) {
2662 #ifdef CONFIG_ISDN_X25
2663 struct concap_proto *cprot = p->cprot;
2664 #endif
2665 if (isdn_net_device_started(p)) {
2666 printk(KERN_WARNING "%s: cannot change encap when if is up\n",
2667 p->dev->name);
2668 return -EBUSY;
2669 }
2670 #ifdef CONFIG_ISDN_X25
2671 if (cprot && cprot->pops)
2672 cprot->pops->proto_del(cprot);
2673 p->cprot = NULL;
2674 lp->dops = NULL;
2675 /* ... , prepare for configuration of new one ... */
2676 switch (cfg->p_encap) {
2677 case ISDN_NET_ENCAP_X25IFACE:
2678 lp->dops = &isdn_concap_reliable_dl_dops;
2679 }
2680 /* ... and allocate new one ... */
2681 p->cprot = isdn_concap_new(cfg->p_encap);
2682 /* p -> cprot == NULL now if p_encap is not supported
2683 by means of the concap_proto mechanism */
2684 /* the protocol is not configured yet; this will
2685 happen later when isdn_net_reset() is called */
2686 #endif
2687 }
2688 switch (cfg->p_encap) {
2689 case ISDN_NET_ENCAP_SYNCPPP:
2690 #ifndef CONFIG_ISDN_PPP
2691 printk(KERN_WARNING "%s: SyncPPP support not configured\n",
2692 p->dev->name);
2693 return -EINVAL;
2694 #else
2695 p->dev->type = ARPHRD_PPP; /* change ARP type */
2696 p->dev->addr_len = 0;
2697 #endif
2698 break;
2699 case ISDN_NET_ENCAP_X25IFACE:
2700 #ifndef CONFIG_ISDN_X25
2701 printk(KERN_WARNING "%s: isdn-x25 support not configured\n",
2702 p->dev->name);
2703 return -EINVAL;
2704 #else
2705 p->dev->type = ARPHRD_X25; /* change ARP type */
2706 p->dev->addr_len = 0;
2707 #endif
2708 break;
2709 case ISDN_NET_ENCAP_CISCOHDLCK:
2710 break;
2711 default:
2712 if (cfg->p_encap >= 0 &&
2713 cfg->p_encap <= ISDN_NET_ENCAP_MAX_ENCAP)
2714 break;
2715 printk(KERN_WARNING
2716 "%s: encapsulation protocol %d not supported\n",
2717 p->dev->name, cfg->p_encap);
2718 return -EINVAL;
2719 }
2720 if (strlen(cfg->drvid)) {
2721 /* A bind has been requested ... */
2722 char *c,
2723 *e;
2724
2725 if (strnlen(cfg->drvid, sizeof(cfg->drvid)) ==
2726 sizeof(cfg->drvid))
2727 return -EINVAL;
2728 drvidx = -1;
2729 chidx = -1;
2730 strcpy(drvid, cfg->drvid);
2731 if ((c = strchr(drvid, ','))) {
2732 /* The channel-number is appended to the driver-Id with a comma */
2733 chidx = (int) simple_strtoul(c + 1, &e, 10);
2734 if (e == c)
2735 chidx = -1;
2736 *c = '\0';
2737 }
2738 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2739 /* Lookup driver-Id in array */
2740 if (!(strcmp(dev->drvid[i], drvid))) {
2741 drvidx = i;
2742 break;
2743 }
2744 if ((drvidx == -1) || (chidx == -1))
2745 /* Either driver-Id or channel-number invalid */
2746 return -ENODEV;
2747 } else {
2748 /* Parameters are valid, so get them */
2749 drvidx = lp->pre_device;
2750 chidx = lp->pre_channel;
2751 }
2752 if (cfg->exclusive > 0) {
2753 unsigned long flags;
2754
2755 /* If binding is exclusive, try to grab the channel */
2756 spin_lock_irqsave(&dev->lock, flags);
2757 if ((i = isdn_get_free_channel(ISDN_USAGE_NET,
2758 lp->l2_proto, lp->l3_proto, drvidx,
2759 chidx, lp->msn)) < 0) {
2760 /* Grab failed, because desired channel is in use */
2761 lp->exclusive = -1;
2762 spin_unlock_irqrestore(&dev->lock, flags);
2763 return -EBUSY;
2764 }
2765 /* All went ok, so update isdninfo */
2766 dev->usage[i] = ISDN_USAGE_EXCLUSIVE;
2767 isdn_info_update();
2768 spin_unlock_irqrestore(&dev->lock, flags);
2769 lp->exclusive = i;
2770 } else {
2771 /* Non-exclusive binding or unbind. */
2772 lp->exclusive = -1;
2773 if ((lp->pre_device != -1) && (cfg->exclusive == -1)) {
2774 isdn_unexclusive_channel(lp->pre_device, lp->pre_channel);
2775 isdn_free_channel(lp->pre_device, lp->pre_channel, ISDN_USAGE_NET);
2776 drvidx = -1;
2777 chidx = -1;
2778 }
2779 }
2780 strlcpy(lp->msn, cfg->eaz, sizeof(lp->msn));
2781 lp->pre_device = drvidx;
2782 lp->pre_channel = chidx;
2783 lp->onhtime = cfg->onhtime;
2784 lp->charge = cfg->charge;
2785 lp->l2_proto = cfg->l2_proto;
2786 lp->l3_proto = cfg->l3_proto;
2787 lp->cbdelay = cfg->cbdelay;
2788 lp->dialmax = cfg->dialmax;
2789 lp->triggercps = cfg->triggercps;
2790 lp->slavedelay = cfg->slavedelay * HZ;
2791 lp->pppbind = cfg->pppbind;
2792 lp->dialtimeout = cfg->dialtimeout >= 0 ? cfg->dialtimeout * HZ : -1;
2793 lp->dialwait = cfg->dialwait * HZ;
2794 if (cfg->secure)
2795 lp->flags |= ISDN_NET_SECURE;
2796 else
2797 lp->flags &= ~ISDN_NET_SECURE;
2798 if (cfg->cbhup)
2799 lp->flags |= ISDN_NET_CBHUP;
2800 else
2801 lp->flags &= ~ISDN_NET_CBHUP;
2802 switch (cfg->callback) {
2803 case 0:
2804 lp->flags &= ~(ISDN_NET_CALLBACK | ISDN_NET_CBOUT);
2805 break;
2806 case 1:
2807 lp->flags |= ISDN_NET_CALLBACK;
2808 lp->flags &= ~ISDN_NET_CBOUT;
2809 break;
2810 case 2:
2811 lp->flags |= ISDN_NET_CBOUT;
2812 lp->flags &= ~ISDN_NET_CALLBACK;
2813 break;
2814 }
2815 lp->flags &= ~ISDN_NET_DIALMODE_MASK; /* first all bits off */
2816 if (cfg->dialmode && !(cfg->dialmode & ISDN_NET_DIALMODE_MASK)) {
2817 /* old isdnctrl version, where only 0 or 1 is given */
2818 printk(KERN_WARNING
2819 "Old isdnctrl version detected! Please update.\n");
2820 lp->flags |= ISDN_NET_DM_OFF; /* turn on `off' bit */
2821 }
2822 else {
2823 lp->flags |= cfg->dialmode; /* turn on selected bits */
2824 }
2825 if (cfg->chargehup)
2826 lp->hupflags |= ISDN_CHARGEHUP;
2827 else
2828 lp->hupflags &= ~ISDN_CHARGEHUP;
2829 if (cfg->ihup)
2830 lp->hupflags |= ISDN_INHUP;
2831 else
2832 lp->hupflags &= ~ISDN_INHUP;
2833 if (cfg->chargeint > 10) {
2834 lp->hupflags |= ISDN_CHARGEHUP | ISDN_HAVECHARGE | ISDN_MANCHARGE;
2835 lp->chargeint = cfg->chargeint * HZ;
2836 }
2837 if (cfg->p_encap != lp->p_encap) {
2838 if (cfg->p_encap == ISDN_NET_ENCAP_RAWIP) {
2839 p->dev->header_ops = NULL;
2840 p->dev->flags = IFF_NOARP | IFF_POINTOPOINT;
2841 } else {
2842 p->dev->header_ops = &isdn_header_ops;
2843 if (cfg->p_encap == ISDN_NET_ENCAP_ETHER)
2844 p->dev->flags = IFF_BROADCAST | IFF_MULTICAST;
2845 else
2846 p->dev->flags = IFF_NOARP | IFF_POINTOPOINT;
2847 }
2848 }
2849 lp->p_encap = cfg->p_encap;
2850 return 0;
2851 }
2852 return -ENODEV;
2853 }
2854
2855 /*
2856 * Perform get-interface-parameters.ioctl
2857 */
2858 int
2859 isdn_net_getcfg(isdn_net_ioctl_cfg *cfg)
2860 {
2861 isdn_net_dev *p = isdn_net_findif(cfg->name);
2862
2863 if (p) {
2864 isdn_net_local *lp = p->local;
2865
2866 strcpy(cfg->eaz, lp->msn);
2867 cfg->exclusive = lp->exclusive;
2868 if (lp->pre_device >= 0) {
2869 sprintf(cfg->drvid, "%s,%d", dev->drvid[lp->pre_device],
2870 lp->pre_channel);
2871 } else
2872 cfg->drvid[0] = '\0';
2873 cfg->onhtime = lp->onhtime;
2874 cfg->charge = lp->charge;
2875 cfg->l2_proto = lp->l2_proto;
2876 cfg->l3_proto = lp->l3_proto;
2877 cfg->p_encap = lp->p_encap;
2878 cfg->secure = (lp->flags & ISDN_NET_SECURE) ? 1 : 0;
2879 cfg->callback = 0;
2880 if (lp->flags & ISDN_NET_CALLBACK)
2881 cfg->callback = 1;
2882 if (lp->flags & ISDN_NET_CBOUT)
2883 cfg->callback = 2;
2884 cfg->cbhup = (lp->flags & ISDN_NET_CBHUP) ? 1 : 0;
2885 cfg->dialmode = lp->flags & ISDN_NET_DIALMODE_MASK;
2886 cfg->chargehup = (lp->hupflags & ISDN_CHARGEHUP) ? 1 : 0;
2887 cfg->ihup = (lp->hupflags & ISDN_INHUP) ? 1 : 0;
2888 cfg->cbdelay = lp->cbdelay;
2889 cfg->dialmax = lp->dialmax;
2890 cfg->triggercps = lp->triggercps;
2891 cfg->slavedelay = lp->slavedelay / HZ;
2892 cfg->chargeint = (lp->hupflags & ISDN_CHARGEHUP) ?
2893 (lp->chargeint / HZ) : 0;
2894 cfg->pppbind = lp->pppbind;
2895 cfg->dialtimeout = lp->dialtimeout >= 0 ? lp->dialtimeout / HZ : -1;
2896 cfg->dialwait = lp->dialwait / HZ;
2897 if (lp->slave) {
2898 if (strlen(lp->slave->name) >= 10)
2899 strcpy(cfg->slave, "too-long");
2900 else
2901 strcpy(cfg->slave, lp->slave->name);
2902 } else
2903 cfg->slave[0] = '\0';
2904 if (lp->master) {
2905 if (strlen(lp->master->name) >= 10)
2906 strcpy(cfg->master, "too-long");
2907 else
2908 strcpy(cfg->master, lp->master->name);
2909 } else
2910 cfg->master[0] = '\0';
2911 return 0;
2912 }
2913 return -ENODEV;
2914 }
2915
2916 /*
2917 * Add a phone-number to an interface.
2918 */
2919 int
2920 isdn_net_addphone(isdn_net_ioctl_phone *phone)
2921 {
2922 isdn_net_dev *p = isdn_net_findif(phone->name);
2923 isdn_net_phone *n;
2924
2925 if (p) {
2926 if (!(n = kmalloc(sizeof(isdn_net_phone), GFP_KERNEL)))
2927 return -ENOMEM;
2928 strlcpy(n->num, phone->phone, sizeof(n->num));
2929 n->next = p->local->phone[phone->outgoing & 1];
2930 p->local->phone[phone->outgoing & 1] = n;
2931 return 0;
2932 }
2933 return -ENODEV;
2934 }
2935
2936 /*
2937 * Copy a string of all phone-numbers of an interface to user space.
2938 * This might sleep and must be called with the isdn semaphore down.
2939 */
2940 int
2941 isdn_net_getphones(isdn_net_ioctl_phone *phone, char __user *phones)
2942 {
2943 isdn_net_dev *p = isdn_net_findif(phone->name);
2944 int inout = phone->outgoing & 1;
2945 int more = 0;
2946 int count = 0;
2947 isdn_net_phone *n;
2948
2949 if (!p)
2950 return -ENODEV;
2951 inout &= 1;
2952 for (n = p->local->phone[inout]; n; n = n->next) {
2953 if (more) {
2954 put_user(' ', phones++);
2955 count++;
2956 }
2957 if (copy_to_user(phones, n->num, strlen(n->num) + 1)) {
2958 return -EFAULT;
2959 }
2960 phones += strlen(n->num);
2961 count += strlen(n->num);
2962 more = 1;
2963 }
2964 put_user(0, phones);
2965 count++;
2966 return count;
2967 }
2968
2969 /*
2970 * Copy a string containing the peer's phone number of a connected interface
2971 * to user space.
2972 */
2973 int
2974 isdn_net_getpeer(isdn_net_ioctl_phone *phone, isdn_net_ioctl_phone __user *peer)
2975 {
2976 isdn_net_dev *p = isdn_net_findif(phone->name);
2977 int ch, dv, idx;
2978
2979 if (!p)
2980 return -ENODEV;
2981 /*
2982 * Theoretical race: while this executes, the remote number might
2983 * become invalid (hang up) or change (new connection), resulting
2984 * in (partially) wrong number copied to user. This race
2985 * currently ignored.
2986 */
2987 ch = p->local->isdn_channel;
2988 dv = p->local->isdn_device;
2989 if (ch < 0 && dv < 0)
2990 return -ENOTCONN;
2991 idx = isdn_dc2minor(dv, ch);
2992 if (idx < 0)
2993 return -ENODEV;
2994 /* for pre-bound channels, we need this extra check */
2995 if (strncmp(dev->num[idx], "???", 3) == 0)
2996 return -ENOTCONN;
2997 strncpy(phone->phone, dev->num[idx], ISDN_MSNLEN);
2998 phone->outgoing = USG_OUTGOING(dev->usage[idx]);
2999 if (copy_to_user(peer, phone, sizeof(*peer)))
3000 return -EFAULT;
3001 return 0;
3002 }
3003 /*
3004 * Delete a phone-number from an interface.
3005 */
3006 int
3007 isdn_net_delphone(isdn_net_ioctl_phone *phone)
3008 {
3009 isdn_net_dev *p = isdn_net_findif(phone->name);
3010 int inout = phone->outgoing & 1;
3011 isdn_net_phone *n;
3012 isdn_net_phone *m;
3013
3014 if (p) {
3015 n = p->local->phone[inout];
3016 m = NULL;
3017 while (n) {
3018 if (!strcmp(n->num, phone->phone)) {
3019 if (p->local->dial == n)
3020 p->local->dial = n->next;
3021 if (m)
3022 m->next = n->next;
3023 else
3024 p->local->phone[inout] = n->next;
3025 kfree(n);
3026 return 0;
3027 }
3028 m = n;
3029 n = (isdn_net_phone *) n->next;
3030 }
3031 return -EINVAL;
3032 }
3033 return -ENODEV;
3034 }
3035
3036 /*
3037 * Delete all phone-numbers of an interface.
3038 */
3039 static int
3040 isdn_net_rmallphone(isdn_net_dev *p)
3041 {
3042 isdn_net_phone *n;
3043 isdn_net_phone *m;
3044 int i;
3045
3046 for (i = 0; i < 2; i++) {
3047 n = p->local->phone[i];
3048 while (n) {
3049 m = n->next;
3050 kfree(n);
3051 n = m;
3052 }
3053 p->local->phone[i] = NULL;
3054 }
3055 p->local->dial = NULL;
3056 return 0;
3057 }
3058
3059 /*
3060 * Force a hangup of a network-interface.
3061 */
3062 int
3063 isdn_net_force_hangup(char *name)
3064 {
3065 isdn_net_dev *p = isdn_net_findif(name);
3066 struct net_device *q;
3067
3068 if (p) {
3069 if (p->local->isdn_device < 0)
3070 return 1;
3071 q = p->local->slave;
3072 /* If this interface has slaves, do a hangup for them also. */
3073 while (q) {
3074 isdn_net_hangup(q);
3075 q = MASTER_TO_SLAVE(q);
3076 }
3077 isdn_net_hangup(p->dev);
3078 return 0;
3079 }
3080 return -ENODEV;
3081 }
3082
3083 /*
3084 * Helper-function for isdn_net_rm: Do the real work.
3085 */
3086 static int
3087 isdn_net_realrm(isdn_net_dev *p, isdn_net_dev *q)
3088 {
3089 u_long flags;
3090
3091 if (isdn_net_device_started(p)) {
3092 return -EBUSY;
3093 }
3094 #ifdef CONFIG_ISDN_X25
3095 if (p->cprot && p->cprot->pops)
3096 p->cprot->pops->proto_del(p->cprot);
3097 #endif
3098 /* Free all phone-entries */
3099 isdn_net_rmallphone(p);
3100 /* If interface is bound exclusive, free channel-usage */
3101 if (p->local->exclusive != -1)
3102 isdn_unexclusive_channel(p->local->pre_device, p->local->pre_channel);
3103 if (p->local->master) {
3104 /* It's a slave-device, so update master's slave-pointer if necessary */
3105 if (((isdn_net_local *) ISDN_MASTER_PRIV(p->local))->slave ==
3106 p->dev)
3107 ((isdn_net_local *)ISDN_MASTER_PRIV(p->local))->slave =
3108 p->local->slave;
3109 } else {
3110 /* Unregister only if it's a master-device */
3111 unregister_netdev(p->dev);
3112 }
3113 /* Unlink device from chain */
3114 spin_lock_irqsave(&dev->lock, flags);
3115 if (q)
3116 q->next = p->next;
3117 else
3118 dev->netdev = p->next;
3119 if (p->local->slave) {
3120 /* If this interface has a slave, remove it also */
3121 char *slavename = p->local->slave->name;
3122 isdn_net_dev *n = dev->netdev;
3123 q = NULL;
3124 while (n) {
3125 if (!strcmp(n->dev->name, slavename)) {
3126 spin_unlock_irqrestore(&dev->lock, flags);
3127 isdn_net_realrm(n, q);
3128 spin_lock_irqsave(&dev->lock, flags);
3129 break;
3130 }
3131 q = n;
3132 n = (isdn_net_dev *)n->next;
3133 }
3134 }
3135 spin_unlock_irqrestore(&dev->lock, flags);
3136 /* If no more net-devices remain, disable auto-hangup timer */
3137 if (dev->netdev == NULL)
3138 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3139 free_netdev(p->dev);
3140 kfree(p);
3141
3142 return 0;
3143 }
3144
3145 /*
3146 * Remove a single network-interface.
3147 */
3148 int
3149 isdn_net_rm(char *name)
3150 {
3151 u_long flags;
3152 isdn_net_dev *p;
3153 isdn_net_dev *q;
3154
3155 /* Search name in netdev-chain */
3156 spin_lock_irqsave(&dev->lock, flags);
3157 p = dev->netdev;
3158 q = NULL;
3159 while (p) {
3160 if (!strcmp(p->dev->name, name)) {
3161 spin_unlock_irqrestore(&dev->lock, flags);
3162 return (isdn_net_realrm(p, q));
3163 }
3164 q = p;
3165 p = (isdn_net_dev *) p->next;
3166 }
3167 spin_unlock_irqrestore(&dev->lock, flags);
3168 /* If no more net-devices remain, disable auto-hangup timer */
3169 if (dev->netdev == NULL)
3170 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3171 return -ENODEV;
3172 }
3173
3174 /*
3175 * Remove all network-interfaces
3176 */
3177 int
3178 isdn_net_rmall(void)
3179 {
3180 u_long flags;
3181 int ret;
3182
3183 /* Walk through netdev-chain */
3184 spin_lock_irqsave(&dev->lock, flags);
3185 while (dev->netdev) {
3186 if (!dev->netdev->local->master) {
3187 /* Remove master-devices only, slaves get removed with their master */
3188 spin_unlock_irqrestore(&dev->lock, flags);
3189 if ((ret = isdn_net_realrm(dev->netdev, NULL))) {
3190 return ret;
3191 }
3192 spin_lock_irqsave(&dev->lock, flags);
3193 }
3194 }
3195 dev->netdev = NULL;
3196 spin_unlock_irqrestore(&dev->lock, flags);
3197 return 0;
3198 }
Linux with added FPC-III support