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MIPS: Yosemite, Emma: Fix off-by-two in arcs_cmdline buffer size check
[linux-2.6/linux-mips.git] / drivers / isdn / i4l / isdn_net.c
blob1f73d7f7e0242e4e73d55582935f4ff0a11f6646
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 is uses struct net_device
62 * for masters and slaves. However, only master interface are registered to
63 * the network layer, and therefore, it only makes sense to call netif_*
64 * functions on them.
65 *
66 * --KG
67 */
68
69 /*
70 * Find out if the netdevice has been ifup-ed yet.
71 * For slaves, look at the corresponding master.
72 */
73 static __inline__ int isdn_net_device_started(isdn_net_dev *n)
74 {
75 isdn_net_local *lp = n->local;
76 struct net_device *dev;
77
78 if (lp->master)
79 dev = lp->master;
80 else
81 dev = n->dev;
82 return netif_running(dev);
83 }
84
85 /*
86 * wake up the network -> net_device queue.
87 * For slaves, wake the corresponding master interface.
88 */
89 static __inline__ void isdn_net_device_wake_queue(isdn_net_local *lp)
90 {
91 if (lp->master)
92 netif_wake_queue(lp->master);
93 else
94 netif_wake_queue(lp->netdev->dev);
95 }
96
97 /*
98 * stop the network -> net_device queue.
99 * For slaves, stop the corresponding master interface.
100 */
101 static __inline__ void isdn_net_device_stop_queue(isdn_net_local *lp)
102 {
103 if (lp->master)
104 netif_stop_queue(lp->master);
105 else
106 netif_stop_queue(lp->netdev->dev);
107 }
108
109 /*
110 * find out if the net_device which this lp belongs to (lp can be
111 * master or slave) is busy. It's busy iff all (master and slave)
112 * queues are busy
113 */
114 static __inline__ int isdn_net_device_busy(isdn_net_local *lp)
115 {
116 isdn_net_local *nlp;
117 isdn_net_dev *nd;
118 unsigned long flags;
119
120 if (!isdn_net_lp_busy(lp))
121 return 0;
122
123 if (lp->master)
124 nd = ISDN_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->tail) {
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 ndev->trans_start = jiffies;
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 ndev->trans_start = jiffies;
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 (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0)
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 (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
1386 skb->pkt_type = PACKET_OTHERHOST;
1387 }
1388 if (ntohs(eth->h_proto) >= 1536)
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(unsigned long data)
1513 {
1514 isdn_net_local *lp = (isdn_net_local *) data;
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 init_timer(&lp->cisco_timer);
1619 lp->cisco_timer.data = (unsigned long) lp;
1620 lp->cisco_timer.function = isdn_net_ciscohdlck_slarp_send_keepalive;
1621 lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1622 add_timer(&lp->cisco_timer);
1623 }
1624
1625 static void
1626 isdn_net_ciscohdlck_disconnected(isdn_net_local *lp)
1627 {
1628 del_timer(&lp->cisco_timer);
1629 }
1630
1631 static void
1632 isdn_net_ciscohdlck_slarp_send_reply(isdn_net_local *lp)
1633 {
1634 struct sk_buff *skb;
1635 unsigned char *p;
1636 struct in_device *in_dev = NULL;
1637 __be32 addr = 0; /* local ipv4 address */
1638 __be32 mask = 0; /* local netmask */
1639
1640 if ((in_dev = lp->netdev->dev->ip_ptr) != NULL) {
1641 /* take primary(first) address of interface */
1642 struct in_ifaddr *ifa = in_dev->ifa_list;
1643 if (ifa != NULL) {
1644 addr = ifa->ifa_local;
1645 mask = ifa->ifa_mask;
1646 }
1647 }
1648
1649 skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1650 if (!skb)
1651 return;
1652
1653 p = skb_put(skb, 4 + 14);
1654
1655 /* cisco header */
1656 *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
1657 *(u8 *)(p + 1) = CISCO_CTRL;
1658 *(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
1659
1660 /* slarp reply, send own ip/netmask; if values are nonsense remote
1661 * should think we are unable to provide it with an address via SLARP */
1662 *(__be32 *)(p + 4) = cpu_to_be32(CISCO_SLARP_REPLY);
1663 *(__be32 *)(p + 8) = addr; // address
1664 *(__be32 *)(p + 12) = mask; // netmask
1665 *(__be16 *)(p + 16) = cpu_to_be16(0); // unused
1666 p += 18;
1667
1668 isdn_net_write_super(lp, skb);
1669 }
1670
1671 static void
1672 isdn_net_ciscohdlck_slarp_in(isdn_net_local *lp, struct sk_buff *skb)
1673 {
1674 unsigned char *p;
1675 int period;
1676 u32 code;
1677 u32 my_seq;
1678 u32 your_seq;
1679 __be32 local;
1680 __be32 *addr, *mask;
1681
1682 if (skb->len < 14)
1683 return;
1684
1685 p = skb->data;
1686 code = be32_to_cpup((__be32 *)p);
1687 p += 4;
1688
1689 switch (code) {
1690 case CISCO_SLARP_REQUEST:
1691 lp->cisco_yourseq = 0;
1692 isdn_net_ciscohdlck_slarp_send_reply(lp);
1693 break;
1694 case CISCO_SLARP_REPLY:
1695 addr = (__be32 *)p;
1696 mask = (__be32 *)(p + 4);
1697 if (*mask != cpu_to_be32(0xfffffffc))
1698 goto slarp_reply_out;
1699 if ((*addr & cpu_to_be32(3)) == cpu_to_be32(0) ||
1700 (*addr & cpu_to_be32(3)) == cpu_to_be32(3))
1701 goto slarp_reply_out;
1702 local = *addr ^ cpu_to_be32(3);
1703 printk(KERN_INFO "%s: got slarp reply: remote ip: %pI4, local ip: %pI4 mask: %pI4\n",
1704 lp->netdev->dev->name, addr, &local, mask);
1705 break;
1706 slarp_reply_out:
1707 printk(KERN_INFO "%s: got invalid slarp reply (%pI4/%pI4) - ignored\n",
1708 lp->netdev->dev->name, addr, mask);
1709 break;
1710 case CISCO_SLARP_KEEPALIVE:
1711 period = (int)((jiffies - lp->cisco_last_slarp_in
1712 + HZ/2 - 1) / HZ);
1713 if (lp->cisco_debserint &&
1714 (period != lp->cisco_keepalive_period) &&
1715 lp->cisco_last_slarp_in) {
1716 printk(KERN_DEBUG "%s: Keepalive period mismatch - "
1717 "is %d but should be %d.\n",
1718 lp->netdev->dev->name, period,
1719 lp->cisco_keepalive_period);
1720 }
1721 lp->cisco_last_slarp_in = jiffies;
1722 my_seq = be32_to_cpup((__be32 *)(p + 0));
1723 your_seq = be32_to_cpup((__be32 *)(p + 4));
1724 p += 10;
1725 lp->cisco_yourseq = my_seq;
1726 lp->cisco_mineseen = your_seq;
1727 break;
1728 }
1729 }
1730
1731 static void
1732 isdn_net_ciscohdlck_receive(isdn_net_local *lp, struct sk_buff *skb)
1733 {
1734 unsigned char *p;
1735 u8 addr;
1736 u8 ctrl;
1737 u16 type;
1738
1739 if (skb->len < 4)
1740 goto out_free;
1741
1742 p = skb->data;
1743 addr = *(u8 *)(p + 0);
1744 ctrl = *(u8 *)(p + 1);
1745 type = be16_to_cpup((__be16 *)(p + 2));
1746 p += 4;
1747 skb_pull(skb, 4);
1748
1749 if (addr != CISCO_ADDR_UNICAST && addr != CISCO_ADDR_BROADCAST) {
1750 printk(KERN_WARNING "%s: Unknown Cisco addr 0x%02x\n",
1751 lp->netdev->dev->name, addr);
1752 goto out_free;
1753 }
1754 if (ctrl != CISCO_CTRL) {
1755 printk(KERN_WARNING "%s: Unknown Cisco ctrl 0x%02x\n",
1756 lp->netdev->dev->name, ctrl);
1757 goto out_free;
1758 }
1759
1760 switch (type) {
1761 case CISCO_TYPE_SLARP:
1762 isdn_net_ciscohdlck_slarp_in(lp, skb);
1763 goto out_free;
1764 case CISCO_TYPE_CDP:
1765 if (lp->cisco_debserint)
1766 printk(KERN_DEBUG "%s: Received CDP packet. use "
1767 "\"no cdp enable\" on cisco.\n",
1768 lp->netdev->dev->name);
1769 goto out_free;
1770 default:
1771 /* no special cisco protocol */
1772 skb->protocol = htons(type);
1773 netif_rx(skb);
1774 return;
1775 }
1776
1777 out_free:
1778 kfree_skb(skb);
1779 }
1780
1781 /*
1782 * Got a packet from ISDN-Channel.
1783 */
1784 static void
1785 isdn_net_receive(struct net_device *ndev, struct sk_buff *skb)
1786 {
1787 isdn_net_local *lp = netdev_priv(ndev);
1788 isdn_net_local *olp = lp; /* original 'lp' */
1789 #ifdef CONFIG_ISDN_X25
1790 struct concap_proto *cprot = lp -> netdev -> cprot;
1791 #endif
1792 lp->transcount += skb->len;
1793
1794 lp->stats.rx_packets++;
1795 lp->stats.rx_bytes += skb->len;
1796 if (lp->master) {
1797 /* Bundling: If device is a slave-device, deliver to master, also
1798 * handle master's statistics and hangup-timeout
1799 */
1800 ndev = lp->master;
1801 lp = netdev_priv(ndev);
1802 lp->stats.rx_packets++;
1803 lp->stats.rx_bytes += skb->len;
1804 }
1805 skb->dev = ndev;
1806 skb->pkt_type = PACKET_HOST;
1807 skb_reset_mac_header(skb);
1808 #ifdef ISDN_DEBUG_NET_DUMP
1809 isdn_dumppkt("R:", skb->data, skb->len, 40);
1810 #endif
1811 switch (lp->p_encap) {
1812 case ISDN_NET_ENCAP_ETHER:
1813 /* Ethernet over ISDN */
1814 olp->huptimer = 0;
1815 lp->huptimer = 0;
1816 skb->protocol = isdn_net_type_trans(skb, ndev);
1817 break;
1818 case ISDN_NET_ENCAP_UIHDLC:
1819 /* HDLC with UI-frame (for ispa with -h1 option) */
1820 olp->huptimer = 0;
1821 lp->huptimer = 0;
1822 skb_pull(skb, 2);
1823 /* Fall through */
1824 case ISDN_NET_ENCAP_RAWIP:
1825 /* RAW-IP without MAC-Header */
1826 olp->huptimer = 0;
1827 lp->huptimer = 0;
1828 skb->protocol = htons(ETH_P_IP);
1829 break;
1830 case ISDN_NET_ENCAP_CISCOHDLCK:
1831 isdn_net_ciscohdlck_receive(lp, skb);
1832 return;
1833 case ISDN_NET_ENCAP_CISCOHDLC:
1834 /* CISCO-HDLC IP with type field and fake I-frame-header */
1835 skb_pull(skb, 2);
1836 /* Fall through */
1837 case ISDN_NET_ENCAP_IPTYP:
1838 /* IP with type field */
1839 olp->huptimer = 0;
1840 lp->huptimer = 0;
1841 skb->protocol = *(__be16 *)&(skb->data[0]);
1842 skb_pull(skb, 2);
1843 if (*(unsigned short *) skb->data == 0xFFFF)
1844 skb->protocol = htons(ETH_P_802_3);
1845 break;
1846 #ifdef CONFIG_ISDN_PPP
1847 case ISDN_NET_ENCAP_SYNCPPP:
1848 /* huptimer is done in isdn_ppp_push_higher */
1849 isdn_ppp_receive(lp->netdev, olp, skb);
1850 return;
1851 #endif
1852
1853 default:
1854 #ifdef CONFIG_ISDN_X25
1855 /* try if there are generic sync_device receiver routines */
1856 if(cprot) if(cprot -> pops)
1857 if( cprot -> pops -> data_ind){
1858 cprot -> pops -> data_ind(cprot,skb);
1859 return;
1860 };
1861 #endif /* CONFIG_ISDN_X25 */
1862 printk(KERN_WARNING "%s: unknown encapsulation, dropping\n",
1863 lp->netdev->dev->name);
1864 kfree_skb(skb);
1865 return;
1866 }
1867
1868 netif_rx(skb);
1869 return;
1870 }
1871
1872 /*
1873 * A packet arrived via ISDN. Search interface-chain for a corresponding
1874 * interface. If found, deliver packet to receiver-function and return 1,
1875 * else return 0.
1876 */
1877 int
1878 isdn_net_rcv_skb(int idx, struct sk_buff *skb)
1879 {
1880 isdn_net_dev *p = dev->rx_netdev[idx];
1881
1882 if (p) {
1883 isdn_net_local *lp = p->local;
1884 if ((lp->flags & ISDN_NET_CONNECTED) &&
1885 (!lp->dialstate)) {
1886 isdn_net_receive(p->dev, skb);
1887 return 1;
1888 }
1889 }
1890 return 0;
1891 }
1892
1893 /*
1894 * build an header
1895 * depends on encaps that is being used.
1896 */
1897
1898 static int isdn_net_header(struct sk_buff *skb, struct net_device *dev,
1899 unsigned short type,
1900 const void *daddr, const void *saddr, unsigned plen)
1901 {
1902 isdn_net_local *lp = netdev_priv(dev);
1903 unsigned char *p;
1904 ushort len = 0;
1905
1906 switch (lp->p_encap) {
1907 case ISDN_NET_ENCAP_ETHER:
1908 len = eth_header(skb, dev, type, daddr, saddr, plen);
1909 break;
1910 #ifdef CONFIG_ISDN_PPP
1911 case ISDN_NET_ENCAP_SYNCPPP:
1912 /* stick on a fake header to keep fragmentation code happy. */
1913 len = IPPP_MAX_HEADER;
1914 skb_push(skb,len);
1915 break;
1916 #endif
1917 case ISDN_NET_ENCAP_RAWIP:
1918 printk(KERN_WARNING "isdn_net_header called with RAW_IP!\n");
1919 len = 0;
1920 break;
1921 case ISDN_NET_ENCAP_IPTYP:
1922 /* ethernet type field */
1923 *((__be16 *)skb_push(skb, 2)) = htons(type);
1924 len = 2;
1925 break;
1926 case ISDN_NET_ENCAP_UIHDLC:
1927 /* HDLC with UI-Frames (for ispa with -h1 option) */
1928 *((__be16 *)skb_push(skb, 2)) = htons(0x0103);
1929 len = 2;
1930 break;
1931 case ISDN_NET_ENCAP_CISCOHDLC:
1932 case ISDN_NET_ENCAP_CISCOHDLCK:
1933 p = skb_push(skb, 4);
1934 *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
1935 *(u8 *)(p + 1) = CISCO_CTRL;
1936 *(__be16 *)(p + 2) = cpu_to_be16(type);
1937 p += 4;
1938 len = 4;
1939 break;
1940 #ifdef CONFIG_ISDN_X25
1941 default:
1942 /* try if there are generic concap protocol routines */
1943 if( lp-> netdev -> cprot ){
1944 printk(KERN_WARNING "isdn_net_header called with concap_proto!\n");
1945 len = 0;
1946 break;
1947 }
1948 break;
1949 #endif /* CONFIG_ISDN_X25 */
1950 }
1951 return len;
1952 }
1953
1954 /* We don't need to send arp, because we have point-to-point connections. */
1955 static int
1956 isdn_net_rebuild_header(struct sk_buff *skb)
1957 {
1958 struct net_device *dev = skb->dev;
1959 isdn_net_local *lp = netdev_priv(dev);
1960 int ret = 0;
1961
1962 if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
1963 struct ethhdr *eth = (struct ethhdr *) skb->data;
1964
1965 /*
1966 * Only ARP/IP is currently supported
1967 */
1968
1969 if (eth->h_proto != htons(ETH_P_IP)) {
1970 printk(KERN_WARNING
1971 "isdn_net: %s don't know how to resolve type %d addresses?\n",
1972 dev->name, (int) eth->h_proto);
1973 memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
1974 return 0;
1975 }
1976 /*
1977 * Try to get ARP to resolve the header.
1978 */
1979 #ifdef CONFIG_INET
1980 ret = arp_find(eth->h_dest, skb);
1981 #endif
1982 }
1983 return ret;
1984 }
1985
1986 static int isdn_header_cache(const struct neighbour *neigh, struct hh_cache *hh,
1987 __be16 type)
1988 {
1989 const struct net_device *dev = neigh->dev;
1990 isdn_net_local *lp = netdev_priv(dev);
1991
1992 if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
1993 return eth_header_cache(neigh, hh, type);
1994 return -1;
1995 }
1996
1997 static void isdn_header_cache_update(struct hh_cache *hh,
1998 const struct net_device *dev,
1999 const unsigned char *haddr)
2000 {
2001 isdn_net_local *lp = netdev_priv(dev);
2002 if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
2003 eth_header_cache_update(hh, dev, haddr);
2004 }
2005
2006 static const struct header_ops isdn_header_ops = {
2007 .create = isdn_net_header,
2008 .rebuild = isdn_net_rebuild_header,
2009 .cache = isdn_header_cache,
2010 .cache_update = isdn_header_cache_update,
2011 };
2012
2013 /*
2014 * Interface-setup. (just after registering a new interface)
2015 */
2016 static int
2017 isdn_net_init(struct net_device *ndev)
2018 {
2019 ushort max_hlhdr_len = 0;
2020 int drvidx;
2021
2022 /*
2023 * up till binding we ask the protocol layer to reserve as much
2024 * as we might need for HL layer
2025 */
2026
2027 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2028 if (dev->drv[drvidx])
2029 if (max_hlhdr_len < dev->drv[drvidx]->interface->hl_hdrlen)
2030 max_hlhdr_len = dev->drv[drvidx]->interface->hl_hdrlen;
2031
2032 ndev->hard_header_len = ETH_HLEN + max_hlhdr_len;
2033 return 0;
2034 }
2035
2036 static void
2037 isdn_net_swapbind(int drvidx)
2038 {
2039 isdn_net_dev *p;
2040
2041 #ifdef ISDN_DEBUG_NET_ICALL
2042 printk(KERN_DEBUG "n_fi: swapping ch of %d\n", drvidx);
2043 #endif
2044 p = dev->netdev;
2045 while (p) {
2046 if (p->local->pre_device == drvidx)
2047 switch (p->local->pre_channel) {
2048 case 0:
2049 p->local->pre_channel = 1;
2050 break;
2051 case 1:
2052 p->local->pre_channel = 0;
2053 break;
2054 }
2055 p = (isdn_net_dev *) p->next;
2056 }
2057 }
2058
2059 static void
2060 isdn_net_swap_usage(int i1, int i2)
2061 {
2062 int u1 = dev->usage[i1] & ISDN_USAGE_EXCLUSIVE;
2063 int u2 = dev->usage[i2] & ISDN_USAGE_EXCLUSIVE;
2064
2065 #ifdef ISDN_DEBUG_NET_ICALL
2066 printk(KERN_DEBUG "n_fi: usage of %d and %d\n", i1, i2);
2067 #endif
2068 dev->usage[i1] &= ~ISDN_USAGE_EXCLUSIVE;
2069 dev->usage[i1] |= u2;
2070 dev->usage[i2] &= ~ISDN_USAGE_EXCLUSIVE;
2071 dev->usage[i2] |= u1;
2072 isdn_info_update();
2073 }
2074
2075 /*
2076 * An incoming call-request has arrived.
2077 * Search the interface-chain for an appropriate interface.
2078 * If found, connect the interface to the ISDN-channel and initiate
2079 * D- and B-Channel-setup. If secure-flag is set, accept only
2080 * configured phone-numbers. If callback-flag is set, initiate
2081 * callback-dialing.
2082 *
2083 * Return-Value: 0 = No appropriate interface for this call.
2084 * 1 = Call accepted
2085 * 2 = Reject call, wait cbdelay, then call back
2086 * 3 = Reject call
2087 * 4 = Wait cbdelay, then call back
2088 * 5 = No appropriate interface for this call,
2089 * would eventually match if CID was longer.
2090 */
2091
2092 int
2093 isdn_net_find_icall(int di, int ch, int idx, setup_parm *setup)
2094 {
2095 char *eaz;
2096 int si1;
2097 int si2;
2098 int ematch;
2099 int wret;
2100 int swapped;
2101 int sidx = 0;
2102 u_long flags;
2103 isdn_net_dev *p;
2104 isdn_net_phone *n;
2105 char nr[ISDN_MSNLEN];
2106 char *my_eaz;
2107
2108 /* Search name in netdev-chain */
2109 if (!setup->phone[0]) {
2110 nr[0] = '0';
2111 nr[1] = '\0';
2112 printk(KERN_INFO "isdn_net: Incoming call without OAD, assuming '0'\n");
2113 } else
2114 strlcpy(nr, setup->phone, ISDN_MSNLEN);
2115 si1 = (int) setup->si1;
2116 si2 = (int) setup->si2;
2117 if (!setup->eazmsn[0]) {
2118 printk(KERN_WARNING "isdn_net: Incoming call without CPN, assuming '0'\n");
2119 eaz = "0";
2120 } else
2121 eaz = setup->eazmsn;
2122 if (dev->net_verbose > 1)
2123 printk(KERN_INFO "isdn_net: call from %s,%d,%d -> %s\n", nr, si1, si2, eaz);
2124 /* Accept DATA and VOICE calls at this stage
2125 * local eaz is checked later for allowed call types
2126 */
2127 if ((si1 != 7) && (si1 != 1)) {
2128 if (dev->net_verbose > 1)
2129 printk(KERN_INFO "isdn_net: Service-Indicator not 1 or 7, ignored\n");
2130 return 0;
2131 }
2132 n = (isdn_net_phone *) 0;
2133 p = dev->netdev;
2134 ematch = wret = swapped = 0;
2135 #ifdef ISDN_DEBUG_NET_ICALL
2136 printk(KERN_DEBUG "n_fi: di=%d ch=%d idx=%d usg=%d\n", di, ch, idx,
2137 dev->usage[idx]);
2138 #endif
2139 while (p) {
2140 int matchret;
2141 isdn_net_local *lp = p->local;
2142
2143 /* If last check has triggered as binding-swap, revert it */
2144 switch (swapped) {
2145 case 2:
2146 isdn_net_swap_usage(idx, sidx);
2147 /* fall through */
2148 case 1:
2149 isdn_net_swapbind(di);
2150 break;
2151 }
2152 swapped = 0;
2153 /* check acceptable call types for DOV */
2154 my_eaz = isdn_map_eaz2msn(lp->msn, di);
2155 if (si1 == 1) { /* it's a DOV call, check if we allow it */
2156 if (*my_eaz == 'v' || *my_eaz == 'V' ||
2157 *my_eaz == 'b' || *my_eaz == 'B')
2158 my_eaz++; /* skip to allow a match */
2159 else
2160 my_eaz = NULL; /* force non match */
2161 } else { /* it's a DATA call, check if we allow it */
2162 if (*my_eaz == 'b' || *my_eaz == 'B')
2163 my_eaz++; /* skip to allow a match */
2164 }
2165 if (my_eaz)
2166 matchret = isdn_msncmp(eaz, my_eaz);
2167 else
2168 matchret = 1;
2169 if (!matchret)
2170 ematch = 1;
2171
2172 /* Remember if more numbers eventually can match */
2173 if (matchret > wret)
2174 wret = matchret;
2175 #ifdef ISDN_DEBUG_NET_ICALL
2176 printk(KERN_DEBUG "n_fi: if='%s', l.msn=%s, l.flags=%d, l.dstate=%d\n",
2177 p->dev->name, lp->msn, lp->flags, lp->dialstate);
2178 #endif
2179 if ((!matchret) && /* EAZ is matching */
2180 (((!(lp->flags & ISDN_NET_CONNECTED)) && /* but not connected */
2181 (USG_NONE(dev->usage[idx]))) || /* and ch. unused or */
2182 ((((lp->dialstate == 4) || (lp->dialstate == 12)) && /* if dialing */
2183 (!(lp->flags & ISDN_NET_CALLBACK))) /* but no callback */
2184 )))
2185 {
2186 #ifdef ISDN_DEBUG_NET_ICALL
2187 printk(KERN_DEBUG "n_fi: match1, pdev=%d pch=%d\n",
2188 lp->pre_device, lp->pre_channel);
2189 #endif
2190 if (dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) {
2191 if ((lp->pre_channel != ch) ||
2192 (lp->pre_device != di)) {
2193 /* Here we got a problem:
2194 * If using an ICN-Card, an incoming call is always signaled on
2195 * on the first channel of the card, if both channels are
2196 * down. However this channel may be bound exclusive. If the
2197 * second channel is free, this call should be accepted.
2198 * The solution is horribly but it runs, so what:
2199 * We exchange the exclusive bindings of the two channels, the
2200 * corresponding variables in the interface-structs.
2201 */
2202 if (ch == 0) {
2203 sidx = isdn_dc2minor(di, 1);
2204 #ifdef ISDN_DEBUG_NET_ICALL
2205 printk(KERN_DEBUG "n_fi: ch is 0\n");
2206 #endif
2207 if (USG_NONE(dev->usage[sidx])) {
2208 /* Second Channel is free, now see if it is bound
2209 * exclusive too. */
2210 if (dev->usage[sidx] & ISDN_USAGE_EXCLUSIVE) {
2211 #ifdef ISDN_DEBUG_NET_ICALL
2212 printk(KERN_DEBUG "n_fi: 2nd channel is down and bound\n");
2213 #endif
2214 /* Yes, swap bindings only, if the original
2215 * binding is bound to channel 1 of this driver */
2216 if ((lp->pre_device == di) &&
2217 (lp->pre_channel == 1)) {
2218 isdn_net_swapbind(di);
2219 swapped = 1;
2220 } else {
2221 /* ... else iterate next device */
2222 p = (isdn_net_dev *) p->next;
2223 continue;
2224 }
2225 } else {
2226 #ifdef ISDN_DEBUG_NET_ICALL
2227 printk(KERN_DEBUG "n_fi: 2nd channel is down and unbound\n");
2228 #endif
2229 /* No, swap always and swap excl-usage also */
2230 isdn_net_swap_usage(idx, sidx);
2231 isdn_net_swapbind(di);
2232 swapped = 2;
2233 }
2234 /* Now check for exclusive binding again */
2235 #ifdef ISDN_DEBUG_NET_ICALL
2236 printk(KERN_DEBUG "n_fi: final check\n");
2237 #endif
2238 if ((dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) &&
2239 ((lp->pre_channel != ch) ||
2240 (lp->pre_device != di))) {
2241 #ifdef ISDN_DEBUG_NET_ICALL
2242 printk(KERN_DEBUG "n_fi: final check failed\n");
2243 #endif
2244 p = (isdn_net_dev *) p->next;
2245 continue;
2246 }
2247 }
2248 } else {
2249 /* We are already on the second channel, so nothing to do */
2250 #ifdef ISDN_DEBUG_NET_ICALL
2251 printk(KERN_DEBUG "n_fi: already on 2nd channel\n");
2252 #endif
2253 }
2254 }
2255 }
2256 #ifdef ISDN_DEBUG_NET_ICALL
2257 printk(KERN_DEBUG "n_fi: match2\n");
2258 #endif
2259 n = lp->phone[0];
2260 if (lp->flags & ISDN_NET_SECURE) {
2261 while (n) {
2262 if (!isdn_msncmp(nr, n->num))
2263 break;
2264 n = (isdn_net_phone *) n->next;
2265 }
2266 }
2267 if (n || (!(lp->flags & ISDN_NET_SECURE))) {
2268 #ifdef ISDN_DEBUG_NET_ICALL
2269 printk(KERN_DEBUG "n_fi: match3\n");
2270 #endif
2271 /* matching interface found */
2272
2273 /*
2274 * Is the state STOPPED?
2275 * If so, no dialin is allowed,
2276 * so reject actively.
2277 * */
2278 if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2279 printk(KERN_INFO "incoming call, interface %s `stopped' -> rejected\n",
2280 p->dev->name);
2281 return 3;
2282 }
2283 /*
2284 * Is the interface up?
2285 * If not, reject the call actively.
2286 */
2287 if (!isdn_net_device_started(p)) {
2288 printk(KERN_INFO "%s: incoming call, interface down -> rejected\n",
2289 p->dev->name);
2290 return 3;
2291 }
2292 /* Interface is up, now see if it's a slave. If so, see if
2293 * it's master and parent slave is online. If not, reject the call.
2294 */
2295 if (lp->master) {
2296 isdn_net_local *mlp = ISDN_MASTER_PRIV(lp);
2297 printk(KERN_DEBUG "ICALLslv: %s\n", p->dev->name);
2298 printk(KERN_DEBUG "master=%s\n", lp->master->name);
2299 if (mlp->flags & ISDN_NET_CONNECTED) {
2300 printk(KERN_DEBUG "master online\n");
2301 /* Master is online, find parent-slave (master if first slave) */
2302 while (mlp->slave) {
2303 if (ISDN_SLAVE_PRIV(mlp) == lp)
2304 break;
2305 mlp = ISDN_SLAVE_PRIV(mlp);
2306 }
2307 } else
2308 printk(KERN_DEBUG "master offline\n");
2309 /* Found parent, if it's offline iterate next device */
2310 printk(KERN_DEBUG "mlpf: %d\n", mlp->flags & ISDN_NET_CONNECTED);
2311 if (!(mlp->flags & ISDN_NET_CONNECTED)) {
2312 p = (isdn_net_dev *) p->next;
2313 continue;
2314 }
2315 }
2316 if (lp->flags & ISDN_NET_CALLBACK) {
2317 int chi;
2318 /*
2319 * Is the state MANUAL?
2320 * If so, no callback can be made,
2321 * so reject actively.
2322 * */
2323 if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2324 printk(KERN_INFO "incoming call for callback, interface %s `off' -> rejected\n",
2325 p->dev->name);
2326 return 3;
2327 }
2328 printk(KERN_DEBUG "%s: call from %s -> %s, start callback\n",
2329 p->dev->name, nr, eaz);
2330 if (lp->phone[1]) {
2331 /* Grab a free ISDN-Channel */
2332 spin_lock_irqsave(&dev->lock, flags);
2333 if ((chi =
2334 isdn_get_free_channel(
2335 ISDN_USAGE_NET,
2336 lp->l2_proto,
2337 lp->l3_proto,
2338 lp->pre_device,
2339 lp->pre_channel,
2340 lp->msn)
2341 ) < 0) {
2342
2343 printk(KERN_WARNING "isdn_net_find_icall: No channel for %s\n",
2344 p->dev->name);
2345 spin_unlock_irqrestore(&dev->lock, flags);
2346 return 0;
2347 }
2348 /* Setup dialstate. */
2349 lp->dtimer = 0;
2350 lp->dialstate = 11;
2351 /* Connect interface with channel */
2352 isdn_net_bind_channel(lp, chi);
2353 #ifdef CONFIG_ISDN_PPP
2354 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2355 if (isdn_ppp_bind(lp) < 0) {
2356 spin_unlock_irqrestore(&dev->lock, flags);
2357 isdn_net_unbind_channel(lp);
2358 return 0;
2359 }
2360 #endif
2361 spin_unlock_irqrestore(&dev->lock, flags);
2362 /* Initiate dialing by returning 2 or 4 */
2363 return (lp->flags & ISDN_NET_CBHUP) ? 2 : 4;
2364 } else
2365 printk(KERN_WARNING "isdn_net: %s: No phone number\n",
2366 p->dev->name);
2367 return 0;
2368 } else {
2369 printk(KERN_DEBUG "%s: call from %s -> %s accepted\n",
2370 p->dev->name, nr, eaz);
2371 /* if this interface is dialing, it does it probably on a different
2372 device, so free this device */
2373 if ((lp->dialstate == 4) || (lp->dialstate == 12)) {
2374 #ifdef CONFIG_ISDN_PPP
2375 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2376 isdn_ppp_free(lp);
2377 #endif
2378 isdn_net_lp_disconnected(lp);
2379 isdn_free_channel(lp->isdn_device, lp->isdn_channel,
2380 ISDN_USAGE_NET);
2381 }
2382 spin_lock_irqsave(&dev->lock, flags);
2383 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2384 dev->usage[idx] |= ISDN_USAGE_NET;
2385 strcpy(dev->num[idx], nr);
2386 isdn_info_update();
2387 dev->st_netdev[idx] = lp->netdev;
2388 lp->isdn_device = di;
2389 lp->isdn_channel = ch;
2390 lp->ppp_slot = -1;
2391 lp->flags |= ISDN_NET_CONNECTED;
2392 lp->dialstate = 7;
2393 lp->dtimer = 0;
2394 lp->outgoing = 0;
2395 lp->huptimer = 0;
2396 lp->hupflags |= ISDN_WAITCHARGE;
2397 lp->hupflags &= ~ISDN_HAVECHARGE;
2398 #ifdef CONFIG_ISDN_PPP
2399 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
2400 if (isdn_ppp_bind(lp) < 0) {
2401 isdn_net_unbind_channel(lp);
2402 spin_unlock_irqrestore(&dev->lock, flags);
2403 return 0;
2404 }
2405 }
2406 #endif
2407 spin_unlock_irqrestore(&dev->lock, flags);
2408 return 1;
2409 }
2410 }
2411 }
2412 p = (isdn_net_dev *) p->next;
2413 }
2414 /* If none of configured EAZ/MSN matched and not verbose, be silent */
2415 if (!ematch || dev->net_verbose)
2416 printk(KERN_INFO "isdn_net: call from %s -> %d %s ignored\n", nr, di, eaz);
2417 return (wret == 2)?5:0;
2418 }
2419
2420 /*
2421 * Search list of net-interfaces for an interface with given name.
2422 */
2423 isdn_net_dev *
2424 isdn_net_findif(char *name)
2425 {
2426 isdn_net_dev *p = dev->netdev;
2427
2428 while (p) {
2429 if (!strcmp(p->dev->name, name))
2430 return p;
2431 p = (isdn_net_dev *) p->next;
2432 }
2433 return (isdn_net_dev *) NULL;
2434 }
2435
2436 /*
2437 * Force a net-interface to dial out.
2438 * This is called from the userlevel-routine below or
2439 * from isdn_net_start_xmit().
2440 */
2441 static int
2442 isdn_net_force_dial_lp(isdn_net_local * lp)
2443 {
2444 if ((!(lp->flags & ISDN_NET_CONNECTED)) && !lp->dialstate) {
2445 int chi;
2446 if (lp->phone[1]) {
2447 ulong flags;
2448
2449 /* Grab a free ISDN-Channel */
2450 spin_lock_irqsave(&dev->lock, flags);
2451 if ((chi = isdn_get_free_channel(
2452 ISDN_USAGE_NET,
2453 lp->l2_proto,
2454 lp->l3_proto,
2455 lp->pre_device,
2456 lp->pre_channel,
2457 lp->msn)) < 0) {
2458 printk(KERN_WARNING "isdn_net_force_dial: No channel for %s\n",
2459 lp->netdev->dev->name);
2460 spin_unlock_irqrestore(&dev->lock, flags);
2461 return -EAGAIN;
2462 }
2463 lp->dialstate = 1;
2464 /* Connect interface with channel */
2465 isdn_net_bind_channel(lp, chi);
2466 #ifdef CONFIG_ISDN_PPP
2467 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2468 if (isdn_ppp_bind(lp) < 0) {
2469 isdn_net_unbind_channel(lp);
2470 spin_unlock_irqrestore(&dev->lock, flags);
2471 return -EAGAIN;
2472 }
2473 #endif
2474 /* Initiate dialing */
2475 spin_unlock_irqrestore(&dev->lock, flags);
2476 isdn_net_dial();
2477 return 0;
2478 } else
2479 return -EINVAL;
2480 } else
2481 return -EBUSY;
2482 }
2483
2484 /*
2485 * This is called from certain upper protocol layers (multilink ppp
2486 * and x25iface encapsulation module) that want to initiate dialing
2487 * themselves.
2488 */
2489 int
2490 isdn_net_dial_req(isdn_net_local * lp)
2491 {
2492 /* is there a better error code? */
2493 if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) return -EBUSY;
2494
2495 return isdn_net_force_dial_lp(lp);
2496 }
2497
2498 /*
2499 * Force a net-interface to dial out.
2500 * This is always called from within userspace (ISDN_IOCTL_NET_DIAL).
2501 */
2502 int
2503 isdn_net_force_dial(char *name)
2504 {
2505 isdn_net_dev *p = isdn_net_findif(name);
2506
2507 if (!p)
2508 return -ENODEV;
2509 return (isdn_net_force_dial_lp(p->local));
2510 }
2511
2512 /* The ISDN-specific entries in the device structure. */
2513 static const struct net_device_ops isdn_netdev_ops = {
2514 .ndo_init = isdn_net_init,
2515 .ndo_open = isdn_net_open,
2516 .ndo_stop = isdn_net_close,
2517 .ndo_do_ioctl = isdn_net_ioctl,
2518
2519 .ndo_start_xmit = isdn_net_start_xmit,
2520 .ndo_get_stats = isdn_net_get_stats,
2521 .ndo_tx_timeout = isdn_net_tx_timeout,
2522 };
2523
2524 /*
2525 * Helper for alloc_netdev()
2526 */
2527 static void _isdn_setup(struct net_device *dev)
2528 {
2529 isdn_net_local *lp = netdev_priv(dev);
2530
2531 ether_setup(dev);
2532
2533 /* Setup the generic properties */
2534 dev->flags = IFF_NOARP|IFF_POINTOPOINT;
2535
2536 /* isdn prepends a header in the tx path, can't share skbs */
2537 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
2538 dev->header_ops = NULL;
2539 dev->netdev_ops = &isdn_netdev_ops;
2540
2541 /* for clients with MPPP maybe higher values better */
2542 dev->tx_queue_len = 30;
2543
2544 lp->p_encap = ISDN_NET_ENCAP_RAWIP;
2545 lp->magic = ISDN_NET_MAGIC;
2546 lp->last = lp;
2547 lp->next = lp;
2548 lp->isdn_device = -1;
2549 lp->isdn_channel = -1;
2550 lp->pre_device = -1;
2551 lp->pre_channel = -1;
2552 lp->exclusive = -1;
2553 lp->ppp_slot = -1;
2554 lp->pppbind = -1;
2555 skb_queue_head_init(&lp->super_tx_queue);
2556 lp->l2_proto = ISDN_PROTO_L2_X75I;
2557 lp->l3_proto = ISDN_PROTO_L3_TRANS;
2558 lp->triggercps = 6000;
2559 lp->slavedelay = 10 * HZ;
2560 lp->hupflags = ISDN_INHUP; /* Do hangup even on incoming calls */
2561 lp->onhtime = 10; /* Default hangup-time for saving costs */
2562 lp->dialmax = 1;
2563 /* Hangup before Callback, manual dial */
2564 lp->flags = ISDN_NET_CBHUP | ISDN_NET_DM_MANUAL;
2565 lp->cbdelay = 25; /* Wait 5 secs before Callback */
2566 lp->dialtimeout = -1; /* Infinite Dial-Timeout */
2567 lp->dialwait = 5 * HZ; /* Wait 5 sec. after failed dial */
2568 lp->dialstarted = 0; /* Jiffies of last dial-start */
2569 lp->dialwait_timer = 0; /* Jiffies of earliest next dial-start */
2570 }
2571
2572 /*
2573 * Allocate a new network-interface and initialize its data structures.
2574 */
2575 char *
2576 isdn_net_new(char *name, struct net_device *master)
2577 {
2578 isdn_net_dev *netdev;
2579
2580 /* Avoid creating an existing interface */
2581 if (isdn_net_findif(name)) {
2582 printk(KERN_WARNING "isdn_net: interface %s already exists\n", name);
2583 return NULL;
2584 }
2585 if (name == NULL)
2586 return NULL;
2587 if (!(netdev = kzalloc(sizeof(isdn_net_dev), GFP_KERNEL))) {
2588 printk(KERN_WARNING "isdn_net: Could not allocate net-device\n");
2589 return NULL;
2590 }
2591 netdev->dev = alloc_netdev(sizeof(isdn_net_local), name, _isdn_setup);
2592 if (!netdev->dev) {
2593 printk(KERN_WARNING "isdn_net: Could not allocate network device\n");
2594 kfree(netdev);
2595 return NULL;
2596 }
2597 netdev->local = netdev_priv(netdev->dev);
2598
2599 if (master) {
2600 /* Device shall be a slave */
2601 struct net_device *p = MASTER_TO_SLAVE(master);
2602 struct net_device *q = master;
2603
2604 netdev->local->master = master;
2605 /* Put device at end of slave-chain */
2606 while (p) {
2607 q = p;
2608 p = MASTER_TO_SLAVE(p);
2609 }
2610 MASTER_TO_SLAVE(q) = netdev->dev;
2611 } else {
2612 /* Device shall be a master */
2613 /*
2614 * Watchdog timer (currently) for master only.
2615 */
2616 netdev->dev->watchdog_timeo = ISDN_NET_TX_TIMEOUT;
2617 if (register_netdev(netdev->dev) != 0) {
2618 printk(KERN_WARNING "isdn_net: Could not register net-device\n");
2619 free_netdev(netdev->dev);
2620 kfree(netdev);
2621 return NULL;
2622 }
2623 }
2624 netdev->queue = netdev->local;
2625 spin_lock_init(&netdev->queue_lock);
2626
2627 netdev->local->netdev = netdev;
2628
2629 INIT_WORK(&netdev->local->tqueue, isdn_net_softint);
2630 spin_lock_init(&netdev->local->xmit_lock);
2631
2632 /* Put into to netdev-chain */
2633 netdev->next = (void *) dev->netdev;
2634 dev->netdev = netdev;
2635 return netdev->dev->name;
2636 }
2637
2638 char *
2639 isdn_net_newslave(char *parm)
2640 {
2641 char *p = strchr(parm, ',');
2642 isdn_net_dev *n;
2643 char newname[10];
2644
2645 if (p) {
2646 /* Slave-Name MUST not be empty */
2647 if (!strlen(p + 1))
2648 return NULL;
2649 strcpy(newname, p + 1);
2650 *p = 0;
2651 /* Master must already exist */
2652 if (!(n = isdn_net_findif(parm)))
2653 return NULL;
2654 /* Master must be a real interface, not a slave */
2655 if (n->local->master)
2656 return NULL;
2657 /* Master must not be started yet */
2658 if (isdn_net_device_started(n))
2659 return NULL;
2660 return (isdn_net_new(newname, n->dev));
2661 }
2662 return NULL;
2663 }
2664
2665 /*
2666 * Set interface-parameters.
2667 * Always set all parameters, so the user-level application is responsible
2668 * for not overwriting existing setups. It has to get the current
2669 * setup first, if only selected parameters are to be changed.
2670 */
2671 int
2672 isdn_net_setcfg(isdn_net_ioctl_cfg * cfg)
2673 {
2674 isdn_net_dev *p = isdn_net_findif(cfg->name);
2675 ulong features;
2676 int i;
2677 int drvidx;
2678 int chidx;
2679 char drvid[25];
2680
2681 if (p) {
2682 isdn_net_local *lp = p->local;
2683
2684 /* See if any registered driver supports the features we want */
2685 features = ((1 << cfg->l2_proto) << ISDN_FEATURE_L2_SHIFT) |
2686 ((1 << cfg->l3_proto) << ISDN_FEATURE_L3_SHIFT);
2687 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2688 if (dev->drv[i])
2689 if ((dev->drv[i]->interface->features & features) == features)
2690 break;
2691 if (i == ISDN_MAX_DRIVERS) {
2692 printk(KERN_WARNING "isdn_net: No driver with selected features\n");
2693 return -ENODEV;
2694 }
2695 if (lp->p_encap != cfg->p_encap){
2696 #ifdef CONFIG_ISDN_X25
2697 struct concap_proto * cprot = p -> cprot;
2698 #endif
2699 if (isdn_net_device_started(p)) {
2700 printk(KERN_WARNING "%s: cannot change encap when if is up\n",
2701 p->dev->name);
2702 return -EBUSY;
2703 }
2704 #ifdef CONFIG_ISDN_X25
2705 if( cprot && cprot -> pops )
2706 cprot -> pops -> proto_del ( cprot );
2707 p -> cprot = NULL;
2708 lp -> dops = NULL;
2709 /* ... , prepare for configuration of new one ... */
2710 switch ( cfg -> p_encap ){
2711 case ISDN_NET_ENCAP_X25IFACE:
2712 lp -> dops = &isdn_concap_reliable_dl_dops;
2713 }
2714 /* ... and allocate new one ... */
2715 p -> cprot = isdn_concap_new( cfg -> p_encap );
2716 /* p -> cprot == NULL now if p_encap is not supported
2717 by means of the concap_proto mechanism */
2718 /* the protocol is not configured yet; this will
2719 happen later when isdn_net_reset() is called */
2720 #endif
2721 }
2722 switch ( cfg->p_encap ) {
2723 case ISDN_NET_ENCAP_SYNCPPP:
2724 #ifndef CONFIG_ISDN_PPP
2725 printk(KERN_WARNING "%s: SyncPPP support not configured\n",
2726 p->dev->name);
2727 return -EINVAL;
2728 #else
2729 p->dev->type = ARPHRD_PPP; /* change ARP type */
2730 p->dev->addr_len = 0;
2731 #endif
2732 break;
2733 case ISDN_NET_ENCAP_X25IFACE:
2734 #ifndef CONFIG_ISDN_X25
2735 printk(KERN_WARNING "%s: isdn-x25 support not configured\n",
2736 p->dev->name);
2737 return -EINVAL;
2738 #else
2739 p->dev->type = ARPHRD_X25; /* change ARP type */
2740 p->dev->addr_len = 0;
2741 #endif
2742 break;
2743 case ISDN_NET_ENCAP_CISCOHDLCK:
2744 break;
2745 default:
2746 if( cfg->p_encap >= 0 &&
2747 cfg->p_encap <= ISDN_NET_ENCAP_MAX_ENCAP )
2748 break;
2749 printk(KERN_WARNING
2750 "%s: encapsulation protocol %d not supported\n",
2751 p->dev->name, cfg->p_encap);
2752 return -EINVAL;
2753 }
2754 if (strlen(cfg->drvid)) {
2755 /* A bind has been requested ... */
2756 char *c,
2757 *e;
2758
2759 drvidx = -1;
2760 chidx = -1;
2761 strcpy(drvid, cfg->drvid);
2762 if ((c = strchr(drvid, ','))) {
2763 /* The channel-number is appended to the driver-Id with a comma */
2764 chidx = (int) simple_strtoul(c + 1, &e, 10);
2765 if (e == c)
2766 chidx = -1;
2767 *c = '\0';
2768 }
2769 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2770 /* Lookup driver-Id in array */
2771 if (!(strcmp(dev->drvid[i], drvid))) {
2772 drvidx = i;
2773 break;
2774 }
2775 if ((drvidx == -1) || (chidx == -1))
2776 /* Either driver-Id or channel-number invalid */
2777 return -ENODEV;
2778 } else {
2779 /* Parameters are valid, so get them */
2780 drvidx = lp->pre_device;
2781 chidx = lp->pre_channel;
2782 }
2783 if (cfg->exclusive > 0) {
2784 unsigned long flags;
2785
2786 /* If binding is exclusive, try to grab the channel */
2787 spin_lock_irqsave(&dev->lock, flags);
2788 if ((i = isdn_get_free_channel(ISDN_USAGE_NET,
2789 lp->l2_proto, lp->l3_proto, drvidx,
2790 chidx, lp->msn)) < 0) {
2791 /* Grab failed, because desired channel is in use */
2792 lp->exclusive = -1;
2793 spin_unlock_irqrestore(&dev->lock, flags);
2794 return -EBUSY;
2795 }
2796 /* All went ok, so update isdninfo */
2797 dev->usage[i] = ISDN_USAGE_EXCLUSIVE;
2798 isdn_info_update();
2799 spin_unlock_irqrestore(&dev->lock, flags);
2800 lp->exclusive = i;
2801 } else {
2802 /* Non-exclusive binding or unbind. */
2803 lp->exclusive = -1;
2804 if ((lp->pre_device != -1) && (cfg->exclusive == -1)) {
2805 isdn_unexclusive_channel(lp->pre_device, lp->pre_channel);
2806 isdn_free_channel(lp->pre_device, lp->pre_channel, ISDN_USAGE_NET);
2807 drvidx = -1;
2808 chidx = -1;
2809 }
2810 }
2811 strlcpy(lp->msn, cfg->eaz, sizeof(lp->msn));
2812 lp->pre_device = drvidx;
2813 lp->pre_channel = chidx;
2814 lp->onhtime = cfg->onhtime;
2815 lp->charge = cfg->charge;
2816 lp->l2_proto = cfg->l2_proto;
2817 lp->l3_proto = cfg->l3_proto;
2818 lp->cbdelay = cfg->cbdelay;
2819 lp->dialmax = cfg->dialmax;
2820 lp->triggercps = cfg->triggercps;
2821 lp->slavedelay = cfg->slavedelay * HZ;
2822 lp->pppbind = cfg->pppbind;
2823 lp->dialtimeout = cfg->dialtimeout >= 0 ? cfg->dialtimeout * HZ : -1;
2824 lp->dialwait = cfg->dialwait * HZ;
2825 if (cfg->secure)
2826 lp->flags |= ISDN_NET_SECURE;
2827 else
2828 lp->flags &= ~ISDN_NET_SECURE;
2829 if (cfg->cbhup)
2830 lp->flags |= ISDN_NET_CBHUP;
2831 else
2832 lp->flags &= ~ISDN_NET_CBHUP;
2833 switch (cfg->callback) {
2834 case 0:
2835 lp->flags &= ~(ISDN_NET_CALLBACK | ISDN_NET_CBOUT);
2836 break;
2837 case 1:
2838 lp->flags |= ISDN_NET_CALLBACK;
2839 lp->flags &= ~ISDN_NET_CBOUT;
2840 break;
2841 case 2:
2842 lp->flags |= ISDN_NET_CBOUT;
2843 lp->flags &= ~ISDN_NET_CALLBACK;
2844 break;
2845 }
2846 lp->flags &= ~ISDN_NET_DIALMODE_MASK; /* first all bits off */
2847 if (cfg->dialmode && !(cfg->dialmode & ISDN_NET_DIALMODE_MASK)) {
2848 /* old isdnctrl version, where only 0 or 1 is given */
2849 printk(KERN_WARNING
2850 "Old isdnctrl version detected! Please update.\n");
2851 lp->flags |= ISDN_NET_DM_OFF; /* turn on `off' bit */
2852 }
2853 else {
2854 lp->flags |= cfg->dialmode; /* turn on selected bits */
2855 }
2856 if (cfg->chargehup)
2857 lp->hupflags |= ISDN_CHARGEHUP;
2858 else
2859 lp->hupflags &= ~ISDN_CHARGEHUP;
2860 if (cfg->ihup)
2861 lp->hupflags |= ISDN_INHUP;
2862 else
2863 lp->hupflags &= ~ISDN_INHUP;
2864 if (cfg->chargeint > 10) {
2865 lp->hupflags |= ISDN_CHARGEHUP | ISDN_HAVECHARGE | ISDN_MANCHARGE;
2866 lp->chargeint = cfg->chargeint * HZ;
2867 }
2868 if (cfg->p_encap != lp->p_encap) {
2869 if (cfg->p_encap == ISDN_NET_ENCAP_RAWIP) {
2870 p->dev->header_ops = NULL;
2871 p->dev->flags = IFF_NOARP|IFF_POINTOPOINT;
2872 } else {
2873 p->dev->header_ops = &isdn_header_ops;
2874 if (cfg->p_encap == ISDN_NET_ENCAP_ETHER)
2875 p->dev->flags = IFF_BROADCAST | IFF_MULTICAST;
2876 else
2877 p->dev->flags = IFF_NOARP|IFF_POINTOPOINT;
2878 }
2879 }
2880 lp->p_encap = cfg->p_encap;
2881 return 0;
2882 }
2883 return -ENODEV;
2884 }
2885
2886 /*
2887 * Perform get-interface-parameters.ioctl
2888 */
2889 int
2890 isdn_net_getcfg(isdn_net_ioctl_cfg * cfg)
2891 {
2892 isdn_net_dev *p = isdn_net_findif(cfg->name);
2893
2894 if (p) {
2895 isdn_net_local *lp = p->local;
2896
2897 strcpy(cfg->eaz, lp->msn);
2898 cfg->exclusive = lp->exclusive;
2899 if (lp->pre_device >= 0) {
2900 sprintf(cfg->drvid, "%s,%d", dev->drvid[lp->pre_device],
2901 lp->pre_channel);
2902 } else
2903 cfg->drvid[0] = '\0';
2904 cfg->onhtime = lp->onhtime;
2905 cfg->charge = lp->charge;
2906 cfg->l2_proto = lp->l2_proto;
2907 cfg->l3_proto = lp->l3_proto;
2908 cfg->p_encap = lp->p_encap;
2909 cfg->secure = (lp->flags & ISDN_NET_SECURE) ? 1 : 0;
2910 cfg->callback = 0;
2911 if (lp->flags & ISDN_NET_CALLBACK)
2912 cfg->callback = 1;
2913 if (lp->flags & ISDN_NET_CBOUT)
2914 cfg->callback = 2;
2915 cfg->cbhup = (lp->flags & ISDN_NET_CBHUP) ? 1 : 0;
2916 cfg->dialmode = lp->flags & ISDN_NET_DIALMODE_MASK;
2917 cfg->chargehup = (lp->hupflags & 4) ? 1 : 0;
2918 cfg->ihup = (lp->hupflags & 8) ? 1 : 0;
2919 cfg->cbdelay = lp->cbdelay;
2920 cfg->dialmax = lp->dialmax;
2921 cfg->triggercps = lp->triggercps;
2922 cfg->slavedelay = lp->slavedelay / HZ;
2923 cfg->chargeint = (lp->hupflags & ISDN_CHARGEHUP) ?
2924 (lp->chargeint / HZ) : 0;
2925 cfg->pppbind = lp->pppbind;
2926 cfg->dialtimeout = lp->dialtimeout >= 0 ? lp->dialtimeout / HZ : -1;
2927 cfg->dialwait = lp->dialwait / HZ;
2928 if (lp->slave) {
2929 if (strlen(lp->slave->name) >= 10)
2930 strcpy(cfg->slave, "too-long");
2931 else
2932 strcpy(cfg->slave, lp->slave->name);
2933 } else
2934 cfg->slave[0] = '\0';
2935 if (lp->master) {
2936 if (strlen(lp->master->name) >= 10)
2937 strcpy(cfg->master, "too-long");
2938 else
2939 strcpy(cfg->master, lp->master->name);
2940 } else
2941 cfg->master[0] = '\0';
2942 return 0;
2943 }
2944 return -ENODEV;
2945 }
2946
2947 /*
2948 * Add a phone-number to an interface.
2949 */
2950 int
2951 isdn_net_addphone(isdn_net_ioctl_phone * phone)
2952 {
2953 isdn_net_dev *p = isdn_net_findif(phone->name);
2954 isdn_net_phone *n;
2955
2956 if (p) {
2957 if (!(n = kmalloc(sizeof(isdn_net_phone), GFP_KERNEL)))
2958 return -ENOMEM;
2959 strlcpy(n->num, phone->phone, sizeof(n->num));
2960 n->next = p->local->phone[phone->outgoing & 1];
2961 p->local->phone[phone->outgoing & 1] = n;
2962 return 0;
2963 }
2964 return -ENODEV;
2965 }
2966
2967 /*
2968 * Copy a string of all phone-numbers of an interface to user space.
2969 * This might sleep and must be called with the isdn semaphore down.
2970 */
2971 int
2972 isdn_net_getphones(isdn_net_ioctl_phone * phone, char __user *phones)
2973 {
2974 isdn_net_dev *p = isdn_net_findif(phone->name);
2975 int inout = phone->outgoing & 1;
2976 int more = 0;
2977 int count = 0;
2978 isdn_net_phone *n;
2979
2980 if (!p)
2981 return -ENODEV;
2982 inout &= 1;
2983 for (n = p->local->phone[inout]; n; n = n->next) {
2984 if (more) {
2985 put_user(' ', phones++);
2986 count++;
2987 }
2988 if (copy_to_user(phones, n->num, strlen(n->num) + 1)) {
2989 return -EFAULT;
2990 }
2991 phones += strlen(n->num);
2992 count += strlen(n->num);
2993 more = 1;
2994 }
2995 put_user(0, phones);
2996 count++;
2997 return count;
2998 }
2999
3000 /*
3001 * Copy a string containing the peer's phone number of a connected interface
3002 * to user space.
3003 */
3004 int
3005 isdn_net_getpeer(isdn_net_ioctl_phone *phone, isdn_net_ioctl_phone __user *peer)
3006 {
3007 isdn_net_dev *p = isdn_net_findif(phone->name);
3008 int ch, dv, idx;
3009
3010 if (!p)
3011 return -ENODEV;
3012 /*
3013 * Theoretical race: while this executes, the remote number might
3014 * become invalid (hang up) or change (new connection), resulting
3015 * in (partially) wrong number copied to user. This race
3016 * currently ignored.
3017 */
3018 ch = p->local->isdn_channel;
3019 dv = p->local->isdn_device;
3020 if(ch < 0 && dv < 0)
3021 return -ENOTCONN;
3022 idx = isdn_dc2minor(dv, ch);
3023 if (idx <0 )
3024 return -ENODEV;
3025 /* for pre-bound channels, we need this extra check */
3026 if (strncmp(dev->num[idx], "???", 3) == 0)
3027 return -ENOTCONN;
3028 strncpy(phone->phone, dev->num[idx], ISDN_MSNLEN);
3029 phone->outgoing = USG_OUTGOING(dev->usage[idx]);
3030 if (copy_to_user(peer, phone, sizeof(*peer)))
3031 return -EFAULT;
3032 return 0;
3033 }
3034 /*
3035 * Delete a phone-number from an interface.
3036 */
3037 int
3038 isdn_net_delphone(isdn_net_ioctl_phone * phone)
3039 {
3040 isdn_net_dev *p = isdn_net_findif(phone->name);
3041 int inout = phone->outgoing & 1;
3042 isdn_net_phone *n;
3043 isdn_net_phone *m;
3044
3045 if (p) {
3046 n = p->local->phone[inout];
3047 m = NULL;
3048 while (n) {
3049 if (!strcmp(n->num, phone->phone)) {
3050 if (p->local->dial == n)
3051 p->local->dial = n->next;
3052 if (m)
3053 m->next = n->next;
3054 else
3055 p->local->phone[inout] = n->next;
3056 kfree(n);
3057 return 0;
3058 }
3059 m = n;
3060 n = (isdn_net_phone *) n->next;
3061 }
3062 return -EINVAL;
3063 }
3064 return -ENODEV;
3065 }
3066
3067 /*
3068 * Delete all phone-numbers of an interface.
3069 */
3070 static int
3071 isdn_net_rmallphone(isdn_net_dev * p)
3072 {
3073 isdn_net_phone *n;
3074 isdn_net_phone *m;
3075 int i;
3076
3077 for (i = 0; i < 2; i++) {
3078 n = p->local->phone[i];
3079 while (n) {
3080 m = n->next;
3081 kfree(n);
3082 n = m;
3083 }
3084 p->local->phone[i] = NULL;
3085 }
3086 p->local->dial = NULL;
3087 return 0;
3088 }
3089
3090 /*
3091 * Force a hangup of a network-interface.
3092 */
3093 int
3094 isdn_net_force_hangup(char *name)
3095 {
3096 isdn_net_dev *p = isdn_net_findif(name);
3097 struct net_device *q;
3098
3099 if (p) {
3100 if (p->local->isdn_device < 0)
3101 return 1;
3102 q = p->local->slave;
3103 /* If this interface has slaves, do a hangup for them also. */
3104 while (q) {
3105 isdn_net_hangup(q);
3106 q = MASTER_TO_SLAVE(q);
3107 }
3108 isdn_net_hangup(p->dev);
3109 return 0;
3110 }
3111 return -ENODEV;
3112 }
3113
3114 /*
3115 * Helper-function for isdn_net_rm: Do the real work.
3116 */
3117 static int
3118 isdn_net_realrm(isdn_net_dev * p, isdn_net_dev * q)
3119 {
3120 u_long flags;
3121
3122 if (isdn_net_device_started(p)) {
3123 return -EBUSY;
3124 }
3125 #ifdef CONFIG_ISDN_X25
3126 if( p -> cprot && p -> cprot -> pops )
3127 p -> cprot -> pops -> proto_del ( p -> cprot );
3128 #endif
3129 /* Free all phone-entries */
3130 isdn_net_rmallphone(p);
3131 /* If interface is bound exclusive, free channel-usage */
3132 if (p->local->exclusive != -1)
3133 isdn_unexclusive_channel(p->local->pre_device, p->local->pre_channel);
3134 if (p->local->master) {
3135 /* It's a slave-device, so update master's slave-pointer if necessary */
3136 if (((isdn_net_local *) ISDN_MASTER_PRIV(p->local))->slave ==
3137 p->dev)
3138 ((isdn_net_local *)ISDN_MASTER_PRIV(p->local))->slave =
3139 p->local->slave;
3140 } else {
3141 /* Unregister only if it's a master-device */
3142 unregister_netdev(p->dev);
3143 }
3144 /* Unlink device from chain */
3145 spin_lock_irqsave(&dev->lock, flags);
3146 if (q)
3147 q->next = p->next;
3148 else
3149 dev->netdev = p->next;
3150 if (p->local->slave) {
3151 /* If this interface has a slave, remove it also */
3152 char *slavename = p->local->slave->name;
3153 isdn_net_dev *n = dev->netdev;
3154 q = NULL;
3155 while (n) {
3156 if (!strcmp(n->dev->name, slavename)) {
3157 spin_unlock_irqrestore(&dev->lock, flags);
3158 isdn_net_realrm(n, q);
3159 spin_lock_irqsave(&dev->lock, flags);
3160 break;
3161 }
3162 q = n;
3163 n = (isdn_net_dev *)n->next;
3164 }
3165 }
3166 spin_unlock_irqrestore(&dev->lock, flags);
3167 /* If no more net-devices remain, disable auto-hangup timer */
3168 if (dev->netdev == NULL)
3169 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3170 free_netdev(p->dev);
3171 kfree(p);
3172
3173 return 0;
3174 }
3175
3176 /*
3177 * Remove a single network-interface.
3178 */
3179 int
3180 isdn_net_rm(char *name)
3181 {
3182 u_long flags;
3183 isdn_net_dev *p;
3184 isdn_net_dev *q;
3185
3186 /* Search name in netdev-chain */
3187 spin_lock_irqsave(&dev->lock, flags);
3188 p = dev->netdev;
3189 q = NULL;
3190 while (p) {
3191 if (!strcmp(p->dev->name, name)) {
3192 spin_unlock_irqrestore(&dev->lock, flags);
3193 return (isdn_net_realrm(p, q));
3194 }
3195 q = p;
3196 p = (isdn_net_dev *) p->next;
3197 }
3198 spin_unlock_irqrestore(&dev->lock, flags);
3199 /* If no more net-devices remain, disable auto-hangup timer */
3200 if (dev->netdev == NULL)
3201 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3202 return -ENODEV;
3203 }
3204
3205 /*
3206 * Remove all network-interfaces
3207 */
3208 int
3209 isdn_net_rmall(void)
3210 {
3211 u_long flags;
3212 int ret;
3213
3214 /* Walk through netdev-chain */
3215 spin_lock_irqsave(&dev->lock, flags);
3216 while (dev->netdev) {
3217 if (!dev->netdev->local->master) {
3218 /* Remove master-devices only, slaves get removed with their master */
3219 spin_unlock_irqrestore(&dev->lock, flags);
3220 if ((ret = isdn_net_realrm(dev->netdev, NULL))) {
3221 return ret;
3222 }
3223 spin_lock_irqsave(&dev->lock, flags);
3224 }
3225 }
3226 dev->netdev = NULL;
3227 spin_unlock_irqrestore(&dev->lock, flags);
3228 return 0;
3229 }
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