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netdevice: safe convert to netdev_priv() #part-4
[deliverable/linux.git] / drivers / isdn / i4l / isdn_net.c
CommitLineData
1da177e4
LT		 1/* $Id: isdn_net.c,v 1.1.2.2 2004/01/12 22:37:19 keil Exp $
2 *
3 * Linux ISDN subsystem, network interfaces and related functions (linklevel).
4 *
5 * Copyright 1994-1998 by Fritz Elfert (fritz@isdn4linux.de)
6 * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
7 * Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
8 *
9 * This software may be used and distributed according to the terms
10 * of the GNU General Public License, incorporated herein by reference.
11 *
12 * Data Over Voice (DOV) support added - Guy Ellis 23-Mar-02
13 * guy@traverse.com.au
14 * Outgoing calls - looks for a 'V' in first char of dialed number
15 * Incoming calls - checks first character of eaz as follows:
16 * Numeric - accept DATA only - original functionality
17 * 'V' - accept VOICE (DOV) only
18 * 'B' - accept BOTH DATA and DOV types
19 *
20 * Jan 2001: fix CISCO HDLC Bjoern A. Zeeb <i4l@zabbadoz.net>
21 * for info on the protocol, see
22 * http://i4l.zabbadoz.net/i4l/cisco-hdlc.txt
23 */
24
1da177e4
LT		 25#include <linux/isdn.h>
26#include <net/arp.h>
27#include <net/dst.h>
28#include <net/pkt_sched.h>
29#include <linux/inetdevice.h>
30#include "isdn_common.h"
31#include "isdn_net.h"
32#ifdef CONFIG_ISDN_PPP
33#include "isdn_ppp.h"
34#endif
35#ifdef CONFIG_ISDN_X25
36#include <linux/concap.h>
37#include "isdn_concap.h"
38#endif
39
40
41/*
42 * Outline of new tbusy handling:
43 *
44 * Old method, roughly spoken, consisted of setting tbusy when entering
45 * isdn_net_start_xmit() and at several other locations and clearing
46 * it from isdn_net_start_xmit() thread when sending was successful.
47 *
48 * With 2.3.x multithreaded network core, to prevent problems, tbusy should
49 * only be set by the isdn_net_start_xmit() thread and only when a tx-busy
50 * condition is detected. Other threads (in particular isdn_net_stat_callb())
51 * are only allowed to clear tbusy.
52 *
53 * -HE
54 */
55
56/*
57 * About SOFTNET:
58 * Most of the changes were pretty obvious and basically done by HE already.
59 *
60 * One problem of the isdn net device code is that is uses struct net_device
61 * for masters and slaves. However, only master interface are registered to
62 * the network layer, and therefore, it only makes sense to call netif_*
63 * functions on them.
64 *
65 * --KG
66 */
67
68/*
69 * Find out if the netdevice has been ifup-ed yet.
70 * For slaves, look at the corresponding master.
71 */
72static __inline__ int isdn_net_device_started(isdn_net_dev *n)
73{
74 isdn_net_local *lp = n->local;
75 struct net_device *dev;
76
77 if (lp->master)
78 dev = lp->master;
79 else
d62a38d1 80 dev = n->dev;
1da177e4
LT		 81 return netif_running(dev);
82}
83
84/*
85 * wake up the network -> net_device queue.
86 * For slaves, wake the corresponding master interface.
87 */
88static __inline__ void isdn_net_device_wake_queue(isdn_net_local *lp)
89{
90 if (lp->master)
91 netif_wake_queue(lp->master);
92 else
d62a38d1 93 netif_wake_queue(lp->netdev->dev);
1da177e4
LT		 94}
95
96/*
97 * stop the network -> net_device queue.
98 * For slaves, stop the corresponding master interface.
99 */
100static __inline__ void isdn_net_device_stop_queue(isdn_net_local *lp)
101{
102 if (lp->master)
103 netif_stop_queue(lp->master);
104 else
d62a38d1 105 netif_stop_queue(lp->netdev->dev);
1da177e4
LT		 106}
107
108/*
109 * find out if the net_device which this lp belongs to (lp can be
110 * master or slave) is busy. It's busy iff all (master and slave)
111 * queues are busy
112 */
113static __inline__ int isdn_net_device_busy(isdn_net_local *lp)
114{
115 isdn_net_local *nlp;
116 isdn_net_dev *nd;
117 unsigned long flags;
118
119 if (!isdn_net_lp_busy(lp))
120 return 0;
121
122 if (lp->master)
123 nd = ((isdn_net_local *) lp->master->priv)->netdev;
124 else
125 nd = lp->netdev;
126
127 spin_lock_irqsave(&nd->queue_lock, flags);
128 nlp = lp->next;
129 while (nlp != lp) {
130 if (!isdn_net_lp_busy(nlp)) {
131 spin_unlock_irqrestore(&nd->queue_lock, flags);
132 return 0;
133 }
134 nlp = nlp->next;
135 }
136 spin_unlock_irqrestore(&nd->queue_lock, flags);
137 return 1;
138}
139
140static __inline__ void isdn_net_inc_frame_cnt(isdn_net_local *lp)
141{
142 atomic_inc(&lp->frame_cnt);
143 if (isdn_net_device_busy(lp))
144 isdn_net_device_stop_queue(lp);
145}
146
147static __inline__ void isdn_net_dec_frame_cnt(isdn_net_local *lp)
148{
149 atomic_dec(&lp->frame_cnt);
150
151 if (!(isdn_net_device_busy(lp))) {
152 if (!skb_queue_empty(&lp->super_tx_queue)) {
153 schedule_work(&lp->tqueue);
154 } else {
155 isdn_net_device_wake_queue(lp);
156 }
157 }
158}
159
160static __inline__ void isdn_net_zero_frame_cnt(isdn_net_local *lp)
161{
162 atomic_set(&lp->frame_cnt, 0);
163}
164
165/* For 2.2.x we leave the transmitter busy timeout at 2 secs, just
166 * to be safe.
167 * For 2.3.x we push it up to 20 secs, because call establishment
168 * (in particular callback) may take such a long time, and we
169 * don't want confusing messages in the log. However, there is a slight
170 * possibility that this large timeout will break other things like MPPP,
171 * which might rely on the tx timeout. If so, we'll find out this way...
172 */
173
174#define ISDN_NET_TX_TIMEOUT (20*HZ)
175
176/* Prototypes */
177
3e206b0a 178static int isdn_net_force_dial_lp(isdn_net_local *);
1da177e4
LT		 179static int isdn_net_start_xmit(struct sk_buff *, struct net_device *);
180
181static void isdn_net_ciscohdlck_connected(isdn_net_local *lp);
182static void isdn_net_ciscohdlck_disconnected(isdn_net_local *lp);
183
184char *isdn_net_revision = "$Revision: 1.1.2.2 $";
185
186 /*
187 * Code for raw-networking over ISDN
188 */
189
190static void
191isdn_net_unreachable(struct net_device *dev, struct sk_buff *skb, char *reason)
192{
193 if(skb) {
194
195 u_short proto = ntohs(skb->protocol);
196
197 printk(KERN_DEBUG "isdn_net: %s: %s, signalling dst_link_failure %s\n",
198 dev->name,
199 (reason != NULL) ? reason : "unknown",
200 (proto != ETH_P_IP) ? "Protocol != ETH_P_IP" : "");
201
202 dst_link_failure(skb);
203 }
204 else { /* dial not triggered by rawIP packet */
205 printk(KERN_DEBUG "isdn_net: %s: %s\n",
206 dev->name,
207 (reason != NULL) ? reason : "reason unknown");
208 }
209}
210
211static void
212isdn_net_reset(struct net_device *dev)
213{
214#ifdef CONFIG_ISDN_X25
215 struct concap_device_ops * dops =
216 ( (isdn_net_local *) dev->priv ) -> dops;
217 struct concap_proto * cprot =
218 ( (isdn_net_local *) dev->priv ) -> netdev -> cprot;
219#endif
220#ifdef CONFIG_ISDN_X25
221 if( cprot && cprot -> pops && dops )
222 cprot -> pops -> restart ( cprot, dev, dops );
223#endif
224}
225
226/* Open/initialize the board. */
227static int
228isdn_net_open(struct net_device *dev)
229{
230 int i;
231 struct net_device *p;
232 struct in_device *in_dev;
233
234 /* moved here from isdn_net_reset, because only the master has an
235 interface associated which is supposed to be started. BTW:
236 we need to call netif_start_queue, not netif_wake_queue here */
237 netif_start_queue(dev);
238
239 isdn_net_reset(dev);
240 /* Fill in the MAC-level header (not needed, but for compatibility... */
241 for (i = 0; i < ETH_ALEN - sizeof(u32); i++)
242 dev->dev_addr[i] = 0xfc;
243 if ((in_dev = dev->ip_ptr) != NULL) {
244 /*
245 * Any address will do - we take the first
246 */
247 struct in_ifaddr *ifa = in_dev->ifa_list;
248 if (ifa != NULL)
249 memcpy(dev->dev_addr+2, &ifa->ifa_local, 4);
250 }
251
252 /* If this interface has slaves, start them also */
253
254 if ((p = (((isdn_net_local *) dev->priv)->slave))) {
255 while (p) {
256 isdn_net_reset(p);
257 p = (((isdn_net_local *) p->priv)->slave);
258 }
259 }
260 isdn_lock_drivers();
261 return 0;
262}
263
264/*
265 * Assign an ISDN-channel to a net-interface
266 */
267static void
268isdn_net_bind_channel(isdn_net_local * lp, int idx)
269{
270 lp->flags |= ISDN_NET_CONNECTED;
271 lp->isdn_device = dev->drvmap[idx];
272 lp->isdn_channel = dev->chanmap[idx];
273 dev->rx_netdev[idx] = lp->netdev;
274 dev->st_netdev[idx] = lp->netdev;
275}
276
277/*
278 * unbind a net-interface (resets interface after an error)
279 */
280static void
281isdn_net_unbind_channel(isdn_net_local * lp)
282{
283 skb_queue_purge(&lp->super_tx_queue);
284
285 if (!lp->master) { /* reset only master device */
286 /* Moral equivalent of dev_purge_queues():
287 BEWARE! This chunk of code cannot be called from hardware
288 interrupt handler. I hope it is true. --ANK
289 */
5aa70995 290 qdisc_reset_all_tx(lp->netdev->dev);
1da177e4
LT		 291 }
292 lp->dialstate = 0;
293 dev->rx_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
294 dev->st_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
295 isdn_free_channel(lp->isdn_device, lp->isdn_channel, ISDN_USAGE_NET);
296 lp->flags &= ~ISDN_NET_CONNECTED;
297 lp->isdn_device = -1;
298 lp->isdn_channel = -1;
299}
300
301/*
302 * Perform auto-hangup and cps-calculation for net-interfaces.
303 *
304 * auto-hangup:
305 * Increment idle-counter (this counter is reset on any incoming or
306 * outgoing packet), if counter exceeds configured limit either do a
307 * hangup immediately or - if configured - wait until just before the next
308 * charge-info.
309 *
310 * cps-calculation (needed for dynamic channel-bundling):
311 * Since this function is called every second, simply reset the
312 * byte-counter of the interface after copying it to the cps-variable.
313 */
3e206b0a 314static unsigned long last_jiffies = -HZ;
1da177e4
LT		 315
316void
317isdn_net_autohup(void)
318{
319 isdn_net_dev *p = dev->netdev;
320 int anymore;
321
322 anymore = 0;
323 while (p) {
324 isdn_net_local *l = p->local;
325 if (jiffies == last_jiffies)
326 l->cps = l->transcount;
327 else
328 l->cps = (l->transcount * HZ) / (jiffies - last_jiffies);
329 l->transcount = 0;
330 if (dev->net_verbose > 3)
faca94ff 331 printk(KERN_DEBUG "%s: %d bogocps\n", p->dev->name, l->cps);
1da177e4
LT		 332 if ((l->flags & ISDN_NET_CONNECTED) && (!l->dialstate)) {
333 anymore = 1;
334 l->huptimer++;
335 /*
336 * if there is some dialmode where timeout-hangup
337 * should _not_ be done, check for that here
338 */
339 if ((l->onhtime) &&
340 (l->huptimer > l->onhtime))
341 {
342 if (l->hupflags & ISDN_MANCHARGE &&
343 l->hupflags & ISDN_CHARGEHUP) {
344 while (time_after(jiffies, l->chargetime + l->chargeint))
345 l->chargetime += l->chargeint;
346 if (time_after(jiffies, l->chargetime + l->chargeint - 2 * HZ))
347 if (l->outgoing || l->hupflags & ISDN_INHUP)
d62a38d1 348 isdn_net_hangup(p->dev);
1da177e4
LT		 349 } else if (l->outgoing) {
350 if (l->hupflags & ISDN_CHARGEHUP) {
351 if (l->hupflags & ISDN_WAITCHARGE) {
352 printk(KERN_DEBUG "isdn_net: Hupflags of %s are %X\n",
faca94ff 353 p->dev->name, l->hupflags);
d62a38d1 354 isdn_net_hangup(p->dev);
1da177e4
LT		 355 } else if (time_after(jiffies, l->chargetime + l->chargeint)) {
356 printk(KERN_DEBUG
357 "isdn_net: %s: chtime = %lu, chint = %d\n",
faca94ff 358 p->dev->name, l->chargetime, l->chargeint);
d62a38d1 359 isdn_net_hangup(p->dev);
1da177e4
LT		 360 }
361 } else
d62a38d1 362 isdn_net_hangup(p->dev);
1da177e4 363 } else if (l->hupflags & ISDN_INHUP)
d62a38d1 364 isdn_net_hangup(p->dev);
1da177e4
LT		 365 }
366
367 if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*l) == ISDN_NET_DM_OFF)) {
d62a38d1 368 isdn_net_hangup(p->dev);
1da177e4
LT		 369 break;
370 }
371 }
372 p = (isdn_net_dev *) p->next;
373 }
374 last_jiffies = jiffies;
375 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, anymore);
376}
377
378static void isdn_net_lp_disconnected(isdn_net_local *lp)
379{
380 isdn_net_rm_from_bundle(lp);
381}
382
383/*
384 * Handle status-messages from ISDN-interfacecard.
385 * This function is called from within the main-status-dispatcher
386 * isdn_status_callback, which itself is called from the low-level driver.
387 * Return: 1 = Event handled, 0 = not for us or unknown Event.
388 */
389int
390isdn_net_stat_callback(int idx, isdn_ctrl *c)
391{
392 isdn_net_dev *p = dev->st_netdev[idx];
393 int cmd = c->command;
394
395 if (p) {
396 isdn_net_local *lp = p->local;
397#ifdef CONFIG_ISDN_X25
398 struct concap_proto *cprot = lp->netdev->cprot;
399 struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
400#endif
401 switch (cmd) {
402 case ISDN_STAT_BSENT:
403 /* A packet has successfully been sent out */
404 if ((lp->flags & ISDN_NET_CONNECTED) &&
405 (!lp->dialstate)) {
406 isdn_net_dec_frame_cnt(lp);
407 lp->stats.tx_packets++;
408 lp->stats.tx_bytes += c->parm.length;
409 }
410 return 1;
411 case ISDN_STAT_DCONN:
412 /* D-Channel is up */
413 switch (lp->dialstate) {
414 case 4:
415 case 7:
416 case 8:
417 lp->dialstate++;
418 return 1;
419 case 12:
420 lp->dialstate = 5;
421 return 1;
422 }
423 break;
424 case ISDN_STAT_DHUP:
425 /* Either D-Channel-hangup or error during dialout */
426#ifdef CONFIG_ISDN_X25
427 /* If we are not connencted then dialing had
428 failed. If there are generic encap protocol
429 receiver routines signal the closure of
430 the link*/
431
432 if( !(lp->flags & ISDN_NET_CONNECTED)
433 && pops && pops -> disconn_ind )
434 pops -> disconn_ind(cprot);
435#endif /* CONFIG_ISDN_X25 */
436 if ((!lp->dialstate) && (lp->flags & ISDN_NET_CONNECTED)) {
437 if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
438 isdn_net_ciscohdlck_disconnected(lp);
439#ifdef CONFIG_ISDN_PPP
440 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
441 isdn_ppp_free(lp);
442#endif
443 isdn_net_lp_disconnected(lp);
444 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
faca94ff
KK		 445 printk(KERN_INFO "%s: remote hangup\n", p->dev->name);
446 printk(KERN_INFO "%s: Chargesum is %d\n", p->dev->name,
1da177e4
LT		 447 lp->charge);
448 isdn_net_unbind_channel(lp);
449 return 1;
450 }
451 break;
452#ifdef CONFIG_ISDN_X25
453 case ISDN_STAT_BHUP:
454 /* B-Channel-hangup */
455 /* try if there are generic encap protocol
456 receiver routines and signal the closure of
457 the link */
458 if( pops && pops -> disconn_ind ){
459 pops -> disconn_ind(cprot);
460 return 1;
461 }
462 break;
463#endif /* CONFIG_ISDN_X25 */
464 case ISDN_STAT_BCONN:
465 /* B-Channel is up */
466 isdn_net_zero_frame_cnt(lp);
467 switch (lp->dialstate) {
468 case 5:
469 case 6:
470 case 7:
471 case 8:
472 case 9:
473 case 10:
474 case 12:
475 if (lp->dialstate <= 6) {
476 dev->usage[idx] |= ISDN_USAGE_OUTGOING;
477 isdn_info_update();
478 } else
479 dev->rx_netdev[idx] = p;
480 lp->dialstate = 0;
481 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 1);
482 if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
483 isdn_net_ciscohdlck_connected(lp);
484 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP) {
485 if (lp->master) { /* is lp a slave? */
486 isdn_net_dev *nd = ((isdn_net_local *)lp->master->priv)->netdev;
487 isdn_net_add_to_bundle(nd, lp);
488 }
489 }
faca94ff 490 printk(KERN_INFO "isdn_net: %s connected\n", p->dev->name);
1da177e4
LT		 491 /* If first Chargeinfo comes before B-Channel connect,
492 * we correct the timestamp here.
493 */
494 lp->chargetime = jiffies;
495
496 /* reset dial-timeout */
497 lp->dialstarted = 0;
498 lp->dialwait_timer = 0;
499
500#ifdef CONFIG_ISDN_PPP
501 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
502 isdn_ppp_wakeup_daemon(lp);
503#endif
504#ifdef CONFIG_ISDN_X25
505 /* try if there are generic concap receiver routines */
506 if( pops )
507 if( pops->connect_ind)
508 pops->connect_ind(cprot);
509#endif /* CONFIG_ISDN_X25 */
510 /* ppp needs to do negotiations first */
511 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP)
512 isdn_net_device_wake_queue(lp);
513 return 1;
514 }
515 break;
516 case ISDN_STAT_NODCH:
517 /* No D-Channel avail. */
518 if (lp->dialstate == 4) {
519 lp->dialstate--;
520 return 1;
521 }
522 break;
523 case ISDN_STAT_CINF:
524 /* Charge-info from TelCo. Calculate interval between
525 * charge-infos and set timestamp for last info for
526 * usage by isdn_net_autohup()
527 */
528 lp->charge++;
529 if (lp->hupflags & ISDN_HAVECHARGE) {
530 lp->hupflags &= ~ISDN_WAITCHARGE;
531 lp->chargeint = jiffies - lp->chargetime - (2 * HZ);
532 }
533 if (lp->hupflags & ISDN_WAITCHARGE)
534 lp->hupflags |= ISDN_HAVECHARGE;
535 lp->chargetime = jiffies;
536 printk(KERN_DEBUG "isdn_net: Got CINF chargetime of %s now %lu\n",
faca94ff 537 p->dev->name, lp->chargetime);
1da177e4
LT		 538 return 1;
539 }
540 }
541 return 0;
542}
543
544/*
545 * Perform dialout for net-interfaces and timeout-handling for
546 * D-Channel-up and B-Channel-up Messages.
547 * This function is initially called from within isdn_net_start_xmit() or
548 * or isdn_net_find_icall() after initializing the dialstate for an
549 * interface. If further calls are needed, the function schedules itself
550 * for a timer-callback via isdn_timer_function().
551 * The dialstate is also affected by incoming status-messages from
552 * the ISDN-Channel which are handled in isdn_net_stat_callback() above.
553 */
554void
555isdn_net_dial(void)
556{
557 isdn_net_dev *p = dev->netdev;
558 int anymore = 0;
559 int i;
560 isdn_ctrl cmd;
561 u_char *phone_number;
562
563 while (p) {
564 isdn_net_local *lp = p->local;
565
566#ifdef ISDN_DEBUG_NET_DIAL
567 if (lp->dialstate)
faca94ff 568 printk(KERN_DEBUG "%s: dialstate=%d\n", p->dev->name, lp->dialstate);
1da177e4
LT		 569#endif
570 switch (lp->dialstate) {
571 case 0:
572 /* Nothing to do for this interface */
573 break;
574 case 1:
575 /* Initiate dialout. Set phone-number-pointer to first number
576 * of interface.
577 */
578 lp->dial = lp->phone[1];
579 if (!lp->dial) {
580 printk(KERN_WARNING "%s: phone number deleted?\n",
faca94ff 581 p->dev->name);
d62a38d1 582 isdn_net_hangup(p->dev);
1da177e4
LT		 583 break;
584 }
585 anymore = 1;
586
587 if(lp->dialtimeout > 0)
588 if(lp->dialstarted == 0 || time_after(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait)) {
589 lp->dialstarted = jiffies;
590 lp->dialwait_timer = 0;
591 }
592
593 lp->dialstate++;
594 /* Fall through */
595 case 2:
596 /* Prepare dialing. Clear EAZ, then set EAZ. */
597 cmd.driver = lp->isdn_device;
598 cmd.arg = lp->isdn_channel;
599 cmd.command = ISDN_CMD_CLREAZ;
600 isdn_command(&cmd);
601 sprintf(cmd.parm.num, "%s", isdn_map_eaz2msn(lp->msn, cmd.driver));
602 cmd.command = ISDN_CMD_SETEAZ;
603 isdn_command(&cmd);
604 lp->dialretry = 0;
605 anymore = 1;
606 lp->dialstate++;
607 /* Fall through */
608 case 3:
609 /* Setup interface, dial current phone-number, switch to next number.
610 * If list of phone-numbers is exhausted, increment
611 * retry-counter.
612 */
613 if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF)) {
614 char *s;
615 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
616 s = "dial suppressed: isdn system stopped";
617 else
618 s = "dial suppressed: dialmode `off'";
d62a38d1
KK		 619 isdn_net_unreachable(p->dev, NULL, s);
620 isdn_net_hangup(p->dev);
1da177e4
LT		 621 break;
622 }
623 cmd.driver = lp->isdn_device;
624 cmd.command = ISDN_CMD_SETL2;
625 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
626 isdn_command(&cmd);
627 cmd.driver = lp->isdn_device;
628 cmd.command = ISDN_CMD_SETL3;
629 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
630 isdn_command(&cmd);
631 cmd.driver = lp->isdn_device;
632 cmd.arg = lp->isdn_channel;
633 if (!lp->dial) {
634 printk(KERN_WARNING "%s: phone number deleted?\n",
faca94ff 635 p->dev->name);
d62a38d1 636 isdn_net_hangup(p->dev);
1da177e4
LT		 637 break;
638 }
639 if (!strncmp(lp->dial->num, "LEASED", strlen("LEASED"))) {
640 lp->dialstate = 4;
faca94ff 641 printk(KERN_INFO "%s: Open leased line ...\n", p->dev->name);
1da177e4
LT		 642 } else {
643 if(lp->dialtimeout > 0)
644 if (time_after(jiffies, lp->dialstarted + lp->dialtimeout)) {
645 lp->dialwait_timer = jiffies + lp->dialwait;
646 lp->dialstarted = 0;
d62a38d1
KK		 647 isdn_net_unreachable(p->dev, NULL, "dial: timed out");
648 isdn_net_hangup(p->dev);
1da177e4
LT		 649 break;
650 }
651
652 cmd.driver = lp->isdn_device;
653 cmd.command = ISDN_CMD_DIAL;
654 cmd.parm.setup.si2 = 0;
655
656 /* check for DOV */
657 phone_number = lp->dial->num;
658 if ((*phone_number == 'v') ||
659 (*phone_number == 'V')) { /* DOV call */
660 cmd.parm.setup.si1 = 1;
661 } else { /* DATA call */
662 cmd.parm.setup.si1 = 7;
663 }
664
665 strcpy(cmd.parm.setup.phone, phone_number);
666 /*
667 * Switch to next number or back to start if at end of list.
668 */
669 if (!(lp->dial = (isdn_net_phone *) lp->dial->next)) {
670 lp->dial = lp->phone[1];
671 lp->dialretry++;
672
673 if (lp->dialretry > lp->dialmax) {
674 if (lp->dialtimeout == 0) {
675 lp->dialwait_timer = jiffies + lp->dialwait;
676 lp->dialstarted = 0;
d62a38d1 677 isdn_net_unreachable(p->dev, NULL, "dial: tried all numbers dialmax times");
1da177e4 678 }
d62a38d1 679 isdn_net_hangup(p->dev);
1da177e4
LT		 680 break;
681 }
682 }
683 sprintf(cmd.parm.setup.eazmsn, "%s",
684 isdn_map_eaz2msn(lp->msn, cmd.driver));
685 i = isdn_dc2minor(lp->isdn_device, lp->isdn_channel);
686 if (i >= 0) {
687 strcpy(dev->num[i], cmd.parm.setup.phone);
688 dev->usage[i] |= ISDN_USAGE_OUTGOING;
689 isdn_info_update();
690 }
faca94ff 691 printk(KERN_INFO "%s: dialing %d %s... %s\n", p->dev->name,
1da177e4
LT		 692 lp->dialretry, cmd.parm.setup.phone,
693 (cmd.parm.setup.si1 == 1) ? "DOV" : "");
694 lp->dtimer = 0;
695#ifdef ISDN_DEBUG_NET_DIAL
696 printk(KERN_DEBUG "dial: d=%d c=%d\n", lp->isdn_device,
697 lp->isdn_channel);
698#endif
699 isdn_command(&cmd);
700 }
701 lp->huptimer = 0;
702 lp->outgoing = 1;
703 if (lp->chargeint) {
704 lp->hupflags |= ISDN_HAVECHARGE;
705 lp->hupflags &= ~ISDN_WAITCHARGE;
706 } else {
707 lp->hupflags |= ISDN_WAITCHARGE;
708 lp->hupflags &= ~ISDN_HAVECHARGE;
709 }
710 anymore = 1;
711 lp->dialstate =
712 (lp->cbdelay &&
713 (lp->flags & ISDN_NET_CBOUT)) ? 12 : 4;
714 break;
715 case 4:
716 /* Wait for D-Channel-connect.
717 * If timeout, switch back to state 3.
718 * Dialmax-handling moved to state 3.
719 */
720 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
721 lp->dialstate = 3;
722 anymore = 1;
723 break;
724 case 5:
725 /* Got D-Channel-Connect, send B-Channel-request */
726 cmd.driver = lp->isdn_device;
727 cmd.arg = lp->isdn_channel;
728 cmd.command = ISDN_CMD_ACCEPTB;
729 anymore = 1;
730 lp->dtimer = 0;
731 lp->dialstate++;
732 isdn_command(&cmd);
733 break;
734 case 6:
735 /* Wait for B- or D-Channel-connect. If timeout,
736 * switch back to state 3.
737 */
738#ifdef ISDN_DEBUG_NET_DIAL
739 printk(KERN_DEBUG "dialtimer2: %d\n", lp->dtimer);
740#endif
741 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
742 lp->dialstate = 3;
743 anymore = 1;
744 break;
745 case 7:
746 /* Got incoming Call, setup L2 and L3 protocols,
747 * then wait for D-Channel-connect
748 */
749#ifdef ISDN_DEBUG_NET_DIAL
750 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
751#endif
752 cmd.driver = lp->isdn_device;
753 cmd.command = ISDN_CMD_SETL2;
754 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
755 isdn_command(&cmd);
756 cmd.driver = lp->isdn_device;
757 cmd.command = ISDN_CMD_SETL3;
758 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
759 isdn_command(&cmd);
760 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT15)
d62a38d1 761 isdn_net_hangup(p->dev);
1da177e4
LT		 762 else {
763 anymore = 1;
764 lp->dialstate++;
765 }
766 break;
767 case 9:
768 /* Got incoming D-Channel-Connect, send B-Channel-request */
769 cmd.driver = lp->isdn_device;
770 cmd.arg = lp->isdn_channel;
771 cmd.command = ISDN_CMD_ACCEPTB;
772 isdn_command(&cmd);
773 anymore = 1;
774 lp->dtimer = 0;
775 lp->dialstate++;
776 break;
777 case 8:
778 case 10:
779 /* Wait for B- or D-channel-connect */
780#ifdef ISDN_DEBUG_NET_DIAL
781 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
782#endif
783 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
d62a38d1 784 isdn_net_hangup(p->dev);
1da177e4
LT		 785 else
786 anymore = 1;
787 break;
788 case 11:
789 /* Callback Delay */
790 if (lp->dtimer++ > lp->cbdelay)
791 lp->dialstate = 1;
792 anymore = 1;
793 break;
794 case 12:
795 /* Remote does callback. Hangup after cbdelay, then wait for incoming
796 * call (in state 4).
797 */
798 if (lp->dtimer++ > lp->cbdelay)
799 {
faca94ff 800 printk(KERN_INFO "%s: hangup waiting for callback ...\n", p->dev->name);
1da177e4
LT		 801 lp->dtimer = 0;
802 lp->dialstate = 4;
803 cmd.driver = lp->isdn_device;
804 cmd.command = ISDN_CMD_HANGUP;
805 cmd.arg = lp->isdn_channel;
806 isdn_command(&cmd);
807 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
808 }
809 anymore = 1;
810 break;
811 default:
812 printk(KERN_WARNING "isdn_net: Illegal dialstate %d for device %s\n",
faca94ff 813 lp->dialstate, p->dev->name);
1da177e4
LT		 814 }
815 p = (isdn_net_dev *) p->next;
816 }
817 isdn_timer_ctrl(ISDN_TIMER_NETDIAL, anymore);
818}
819
820/*
821 * Perform hangup for a net-interface.
822 */
823void
824isdn_net_hangup(struct net_device *d)
825{
826 isdn_net_local *lp = (isdn_net_local *) d->priv;
827 isdn_ctrl cmd;
828#ifdef CONFIG_ISDN_X25
829 struct concap_proto *cprot = lp->netdev->cprot;
830 struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
831#endif
832
833 if (lp->flags & ISDN_NET_CONNECTED) {
834 if (lp->slave != NULL) {
835 isdn_net_local *slp = (isdn_net_local *)lp->slave->priv;
836 if (slp->flags & ISDN_NET_CONNECTED) {
837 printk(KERN_INFO
838 "isdn_net: hang up slave %s before %s\n",
faca94ff 839 lp->slave->name, d->name);
1da177e4
LT		 840 isdn_net_hangup(lp->slave);
841 }
842 }
faca94ff 843 printk(KERN_INFO "isdn_net: local hangup %s\n", d->name);
1da177e4
LT		 844#ifdef CONFIG_ISDN_PPP
845 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
846 isdn_ppp_free(lp);
847#endif
848 isdn_net_lp_disconnected(lp);
849#ifdef CONFIG_ISDN_X25
850 /* try if there are generic encap protocol
851 receiver routines and signal the closure of
852 the link */
853 if( pops && pops -> disconn_ind )
854 pops -> disconn_ind(cprot);
855#endif /* CONFIG_ISDN_X25 */
856
857 cmd.driver = lp->isdn_device;
858 cmd.command = ISDN_CMD_HANGUP;
859 cmd.arg = lp->isdn_channel;
860 isdn_command(&cmd);
faca94ff 861 printk(KERN_INFO "%s: Chargesum is %d\n", d->name, lp->charge);
1da177e4
LT		 862 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
863 }
864 isdn_net_unbind_channel(lp);
865}
866
867typedef struct {
868 unsigned short source;
869 unsigned short dest;
870} ip_ports;
871
872static void
873isdn_net_log_skb(struct sk_buff * skb, isdn_net_local * lp)
874{
d56f90a7
ACM		 875 /* hopefully, this was set correctly */
876 const u_char *p = skb_network_header(skb);
1da177e4
LT		 877 unsigned short proto = ntohs(skb->protocol);
878 int data_ofs;
879 ip_ports *ipp;
880 char addinfo[100];
881
882 addinfo[0] = '\0';
883 /* This check stolen from 2.1.72 dev_queue_xmit_nit() */
27a884dc 884 if (p < skb->data || skb->network_header >= skb->tail) {
1da177e4
LT		 885 /* fall back to old isdn_net_log_packet method() */
886 char * buf = skb->data;
887
faca94ff 888 printk(KERN_DEBUG "isdn_net: protocol %04x is buggy, dev %s\n", skb->protocol, lp->netdev->dev->name);
1da177e4
LT		 889 p = buf;
890 proto = ETH_P_IP;
891 switch (lp->p_encap) {
892 case ISDN_NET_ENCAP_IPTYP:
893 proto = ntohs(*(unsigned short *) &buf[0]);
894 p = &buf[2];
895 break;
896 case ISDN_NET_ENCAP_ETHER:
897 proto = ntohs(*(unsigned short *) &buf[12]);
898 p = &buf[14];
899 break;
900 case ISDN_NET_ENCAP_CISCOHDLC:
901 proto = ntohs(*(unsigned short *) &buf[2]);
902 p = &buf[4];
903 break;
904#ifdef CONFIG_ISDN_PPP
905 case ISDN_NET_ENCAP_SYNCPPP:
906 proto = ntohs(skb->protocol);
907 p = &buf[IPPP_MAX_HEADER];
908 break;
909#endif
910 }
911 }
912 data_ofs = ((p[0] & 15) * 4);
913 switch (proto) {
914 case ETH_P_IP:
915 switch (p[9]) {
916 case 1:
917 strcpy(addinfo, " ICMP");
918 break;
919 case 2:
920 strcpy(addinfo, " IGMP");
921 break;
922 case 4:
923 strcpy(addinfo, " IPIP");
924 break;
925 case 6:
926 ipp = (ip_ports *) (&p[data_ofs]);
927 sprintf(addinfo, " TCP, port: %d -> %d", ntohs(ipp->source),
928 ntohs(ipp->dest));
929 break;
930 case 8:
931 strcpy(addinfo, " EGP");
932 break;
933 case 12:
934 strcpy(addinfo, " PUP");
935 break;
936 case 17:
937 ipp = (ip_ports *) (&p[data_ofs]);
938 sprintf(addinfo, " UDP, port: %d -> %d", ntohs(ipp->source),
939 ntohs(ipp->dest));
940 break;
941 case 22:
942 strcpy(addinfo, " IDP");
943 break;
944 }
945 printk(KERN_INFO
946 "OPEN: %d.%d.%d.%d -> %d.%d.%d.%d%s\n",
947
948 p[12], p[13], p[14], p[15],
949 p[16], p[17], p[18], p[19],
950 addinfo);
951 break;
952 case ETH_P_ARP:
953 printk(KERN_INFO
954 "OPEN: ARP %d.%d.%d.%d -> *.*.*.* ?%d.%d.%d.%d\n",
955 p[14], p[15], p[16], p[17],
956 p[24], p[25], p[26], p[27]);
957 break;
958 }
959}
960
961/*
962 * this function is used to send supervisory data, i.e. data which was
963 * not received from the network layer, but e.g. frames from ipppd, CCP
964 * reset frames etc.
965 */
966void isdn_net_write_super(isdn_net_local *lp, struct sk_buff *skb)
967{
968 if (in_irq()) {
969 // we can't grab the lock from irq context,
970 // so we just queue the packet
971 skb_queue_tail(&lp->super_tx_queue, skb);
972 schedule_work(&lp->tqueue);
973 return;
974 }
975
976 spin_lock_bh(&lp->xmit_lock);
977 if (!isdn_net_lp_busy(lp)) {
978 isdn_net_writebuf_skb(lp, skb);
979 } else {
980 skb_queue_tail(&lp->super_tx_queue, skb);
981 }
982 spin_unlock_bh(&lp->xmit_lock);
983}
984
985/*
986 * called from tq_immediate
987 */
c4028958 988static void isdn_net_softint(struct work_struct *work)
1da177e4 989{
c4028958 990 isdn_net_local *lp = container_of(work, isdn_net_local, tqueue);
1da177e4
LT		 991 struct sk_buff *skb;
992
993 spin_lock_bh(&lp->xmit_lock);
994 while (!isdn_net_lp_busy(lp)) {
995 skb = skb_dequeue(&lp->super_tx_queue);
996 if (!skb)
997 break;
998 isdn_net_writebuf_skb(lp, skb);
999 }
1000 spin_unlock_bh(&lp->xmit_lock);
1001}
1002
1003/*
1004 * all frames sent from the (net) LL to a HL driver should go via this function
1005 * it's serialized by the caller holding the lp->xmit_lock spinlock
1006 */
1007void isdn_net_writebuf_skb(isdn_net_local *lp, struct sk_buff *skb)
1008{
1009 int ret;
1010 int len = skb->len; /* save len */
1011
1012 /* before obtaining the lock the caller should have checked that
1013 the lp isn't busy */
1014 if (isdn_net_lp_busy(lp)) {
1015 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1016 goto error;
1017 }
1018
1019 if (!(lp->flags & ISDN_NET_CONNECTED)) {
1020 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1021 goto error;
1022 }
1023 ret = isdn_writebuf_skb_stub(lp->isdn_device, lp->isdn_channel, 1, skb);
1024 if (ret != len) {
1025 /* we should never get here */
faca94ff 1026 printk(KERN_WARNING "%s: HL driver queue full\n", lp->netdev->dev->name);
1da177e4
LT		 1027 goto error;
1028 }
1029
1030 lp->transcount += len;
1031 isdn_net_inc_frame_cnt(lp);
1032 return;
1033
1034 error:
1035 dev_kfree_skb(skb);
1036 lp->stats.tx_errors++;
1037
1038}
1039
1040
1041/*
1042 * Helper function for isdn_net_start_xmit.
1043 * When called, the connection is already established.
1044 * Based on cps-calculation, check if device is overloaded.
1045 * If so, and if a slave exists, trigger dialing for it.
1046 * If any slave is online, deliver packets using a simple round robin
1047 * scheme.
1048 *
1049 * Return: 0 on success, !0 on failure.
1050 */
1051
1052static int
1053isdn_net_xmit(struct net_device *ndev, struct sk_buff *skb)
1054{
1055 isdn_net_dev *nd;
1056 isdn_net_local *slp;
1057 isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1058 int retv = 0;
1059
1060 if (((isdn_net_local *) (ndev->priv))->master) {
1061 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1062 dev_kfree_skb(skb);
1063 return 0;
1064 }
1065
1066 /* For the other encaps the header has already been built */
1067#ifdef CONFIG_ISDN_PPP
1068 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
1069 return isdn_ppp_xmit(skb, ndev);
1070 }
1071#endif
1072 nd = ((isdn_net_local *) ndev->priv)->netdev;
1073 lp = isdn_net_get_locked_lp(nd);
1074 if (!lp) {
1075 printk(KERN_WARNING "%s: all channels busy - requeuing!\n", ndev->name);
1076 return 1;
1077 }
1078 /* we have our lp locked from now on */
1079
1080 /* Reset hangup-timeout */
1081 lp->huptimer = 0; // FIXME?
1082 isdn_net_writebuf_skb(lp, skb);
1083 spin_unlock_bh(&lp->xmit_lock);
1084
1085 /* the following stuff is here for backwards compatibility.
1086 * in future, start-up and hangup of slaves (based on current load)
1087 * should move to userspace and get based on an overall cps
1088 * calculation
1089 */
1090 if (lp->cps > lp->triggercps) {
1091 if (lp->slave) {
1092 if (!lp->sqfull) {
1093 /* First time overload: set timestamp only */
1094 lp->sqfull = 1;
1095 lp->sqfull_stamp = jiffies;
1096 } else {
1097 /* subsequent overload: if slavedelay exceeded, start dialing */
1098 if (time_after(jiffies, lp->sqfull_stamp + lp->slavedelay)) {
1099 slp = lp->slave->priv;
1100 if (!(slp->flags & ISDN_NET_CONNECTED)) {
1101 isdn_net_force_dial_lp((isdn_net_local *) lp->slave->priv);
1102 }
1103 }
1104 }
1105 }
1106 } else {
1107 if (lp->sqfull && time_after(jiffies, lp->sqfull_stamp + lp->slavedelay + (10 * HZ))) {
1108 lp->sqfull = 0;
1109 }
1110 /* this is a hack to allow auto-hangup for slaves on moderate loads */
1111 nd->queue = nd->local;
1112 }
1113
1114 return retv;
1115
1116}
1117
1118static void
1119isdn_net_adjust_hdr(struct sk_buff *skb, struct net_device *dev)
1120{
1121 isdn_net_local *lp = (isdn_net_local *) dev->priv;
1122 if (!skb)
1123 return;
1124 if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
bbe735e4 1125 const int pullsize = skb_network_offset(skb) - ETH_HLEN;
1da177e4
LT		 1126 if (pullsize > 0) {
1127 printk(KERN_DEBUG "isdn_net: Pull junk %d\n", pullsize);
1128 skb_pull(skb, pullsize);
1129 }
1130 }
1131}
1132
1133
3e206b0a 1134static void isdn_net_tx_timeout(struct net_device * ndev)
1da177e4
LT		 1135{
1136 isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1137
1138 printk(KERN_WARNING "isdn_tx_timeout dev %s dialstate %d\n", ndev->name, lp->dialstate);
1139 if (!lp->dialstate){
1140 lp->stats.tx_errors++;
1141 /*
1142 * There is a certain probability that this currently
1143 * works at all because if we always wake up the interface,
1144 * then upper layer will try to send the next packet
1145 * immediately. And then, the old clean_up logic in the
1146 * driver will hopefully continue to work as it used to do.
1147 *
1148 * This is rather primitive right know, we better should
1149 * clean internal queues here, in particular for multilink and
1150 * ppp, and reset HL driver's channel, too. --HE
1151 *
1152 * actually, this may not matter at all, because ISDN hardware
1153 * should not see transmitter hangs at all IMO
1154 * changed KERN_DEBUG to KERN_WARNING to find out if this is
1155 * ever called --KG
1156 */
1157 }
1158 ndev->trans_start = jiffies;
1159 netif_wake_queue(ndev);
1160}
1161
1162/*
1163 * Try sending a packet.
1164 * If this interface isn't connected to a ISDN-Channel, find a free channel,
1165 * and start dialing.
1166 */
1167static int
1168isdn_net_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1169{
1170 isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1171#ifdef CONFIG_ISDN_X25
1172 struct concap_proto * cprot = lp -> netdev -> cprot;
1173/* At this point hard_start_xmit() passes control to the encapsulation
1174 protocol (if present).
1175 For X.25 auto-dialing is completly bypassed because:
1176 - It does not conform with the semantics of a reliable datalink
1177 service as needed by X.25 PLP.
1178 - I don't want that the interface starts dialing when the network layer
1179 sends a message which requests to disconnect the lapb link (or if it
1180 sends any other message not resulting in data transmission).
1181 Instead, dialing will be initiated by the encapsulation protocol entity
1182 when a dl_establish request is received from the upper layer.
1183*/
1184 if (cprot && cprot -> pops) {
1185 int ret = cprot -> pops -> encap_and_xmit ( cprot , skb);
1186
1187 if (ret)
1188 netif_stop_queue(ndev);
1189 return ret;
1190 } else
1191#endif
1192 /* auto-dialing xmit function */
1193 {
1194#ifdef ISDN_DEBUG_NET_DUMP
1195 u_char *buf;
1196#endif
1197 isdn_net_adjust_hdr(skb, ndev);
1198#ifdef ISDN_DEBUG_NET_DUMP
1199 buf = skb->data;
1200 isdn_dumppkt("S:", buf, skb->len, 40);
1201#endif
1202
1203 if (!(lp->flags & ISDN_NET_CONNECTED)) {
1204 int chi;
1205 /* only do autodial if allowed by config */
1206 if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) {
1207 isdn_net_unreachable(ndev, skb, "dial rejected: interface not in dialmode `auto'");
1208 dev_kfree_skb(skb);
1209 return 0;
1210 }
1211 if (lp->phone[1]) {
1212 ulong flags;
1213
1214 if(lp->dialwait_timer <= 0)
1215 if(lp->dialstarted > 0 && lp->dialtimeout > 0 && time_before(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait))
1216 lp->dialwait_timer = lp->dialstarted + lp->dialtimeout + lp->dialwait;
1217
1218 if(lp->dialwait_timer > 0) {
1219 if(time_before(jiffies, lp->dialwait_timer)) {
1220 isdn_net_unreachable(ndev, skb, "dial rejected: retry-time not reached");
1221 dev_kfree_skb(skb);
1222 return 0;
1223 } else
1224 lp->dialwait_timer = 0;
1225 }
1226 /* Grab a free ISDN-Channel */
1227 spin_lock_irqsave(&dev->lock, flags);
1228 if (((chi =
1229 isdn_get_free_channel(
1230 ISDN_USAGE_NET,
1231 lp->l2_proto,
1232 lp->l3_proto,
1233 lp->pre_device,
1234 lp->pre_channel,
1235 lp->msn)
1236 ) < 0) &&
1237 ((chi =
1238 isdn_get_free_channel(
1239 ISDN_USAGE_NET,
1240 lp->l2_proto,
1241 lp->l3_proto,
1242 lp->pre_device,
1243 lp->pre_channel^1,
1244 lp->msn)
1245 ) < 0)) {
1246 spin_unlock_irqrestore(&dev->lock, flags);
1247 isdn_net_unreachable(ndev, skb,
1248 "No channel");
1249 dev_kfree_skb(skb);
1250 return 0;
1251 }
1252 /* Log packet, which triggered dialing */
1253 if (dev->net_verbose)
1254 isdn_net_log_skb(skb, lp);
1255 lp->dialstate = 1;
1256 /* Connect interface with channel */
1257 isdn_net_bind_channel(lp, chi);
1258#ifdef CONFIG_ISDN_PPP
1259 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
1260 /* no 'first_skb' handling for syncPPP */
1261 if (isdn_ppp_bind(lp) < 0) {
1262 dev_kfree_skb(skb);
1263 isdn_net_unbind_channel(lp);
1264 spin_unlock_irqrestore(&dev->lock, flags);
1265 return 0; /* STN (skb to nirvana) ;) */
1266 }
1267#ifdef CONFIG_IPPP_FILTER
1268 if (isdn_ppp_autodial_filter(skb, lp)) {
1269 isdn_ppp_free(lp);
1270 isdn_net_unbind_channel(lp);
1271 spin_unlock_irqrestore(&dev->lock, flags);
1272 isdn_net_unreachable(ndev, skb, "dial rejected: packet filtered");
1273 dev_kfree_skb(skb);
1274 return 0;
1275 }
1276#endif
1277 spin_unlock_irqrestore(&dev->lock, flags);
1278 isdn_net_dial(); /* Initiate dialing */
1279 netif_stop_queue(ndev);
1280 return 1; /* let upper layer requeue skb packet */
1281 }
1282#endif
1283 /* Initiate dialing */
1284 spin_unlock_irqrestore(&dev->lock, flags);
1285 isdn_net_dial();
1286 isdn_net_device_stop_queue(lp);
1287 return 1;
1288 } else {
1289 isdn_net_unreachable(ndev, skb,
1290 "No phone number");
1291 dev_kfree_skb(skb);
1292 return 0;
1293 }
1294 } else {
1295 /* Device is connected to an ISDN channel */
1296 ndev->trans_start = jiffies;
1297 if (!lp->dialstate) {
1298 /* ISDN connection is established, try sending */
1299 int ret;
1300 ret = (isdn_net_xmit(ndev, skb));
1301 if(ret) netif_stop_queue(ndev);
1302 return ret;
1303 } else
1304 netif_stop_queue(ndev);
1305 }
1306 }
1307 return 1;
1308}
1309
1310/*
1311 * Shutdown a net-interface.
1312 */
1313static int
1314isdn_net_close(struct net_device *dev)
1315{
1316 struct net_device *p;
1317#ifdef CONFIG_ISDN_X25
1318 struct concap_proto * cprot =
1319 ( (isdn_net_local *) dev->priv ) -> netdev -> cprot;
1320 /* printk(KERN_DEBUG "isdn_net_close %s\n" , dev-> name ); */
1321#endif
1322
1323#ifdef CONFIG_ISDN_X25
1324 if( cprot && cprot -> pops ) cprot -> pops -> close( cprot );
1325#endif
1326 netif_stop_queue(dev);
1327 if ((p = (((isdn_net_local *) dev->priv)->slave))) {
1328 /* If this interface has slaves, stop them also */
1329 while (p) {
1330#ifdef CONFIG_ISDN_X25
1331 cprot = ( (isdn_net_local *) p->priv )
1332 -> netdev -> cprot;
1333 if( cprot && cprot -> pops )
1334 cprot -> pops -> close( cprot );
1335#endif
1336 isdn_net_hangup(p);
1337 p = (((isdn_net_local *) p->priv)->slave);
1338 }
1339 }
1340 isdn_net_hangup(dev);
1341 isdn_unlock_drivers();
1342 return 0;
1343}
1344
1345/*
1346 * Get statistics
1347 */
1348static struct net_device_stats *
1349isdn_net_get_stats(struct net_device *dev)
1350{
1351 isdn_net_local *lp = (isdn_net_local *) dev->priv;
1352 return &lp->stats;
1353}
1354
1355/* This is simply a copy from std. eth.c EXCEPT we pull ETH_HLEN
1356 * instead of dev->hard_header_len off. This is done because the
1357 * lowlevel-driver has already pulled off its stuff when we get
1358 * here and this routine only gets called with p_encap == ETHER.
1359 * Determine the packet's protocol ID. The rule here is that we
1360 * assume 802.3 if the type field is short enough to be a length.
1361 * This is normal practice and works for any 'now in use' protocol.
1362 */
1363
1364static unsigned short
1365isdn_net_type_trans(struct sk_buff *skb, struct net_device *dev)
1366{
1367 struct ethhdr *eth;
1368 unsigned char *rawp;
1369
459a98ed 1370 skb_reset_mac_header(skb);
1da177e4
LT		 1371 skb_pull(skb, ETH_HLEN);
1372 eth = eth_hdr(skb);
1373
1374 if (*eth->h_dest & 1) {
1375 if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0)
1376 skb->pkt_type = PACKET_BROADCAST;
1377 else
1378 skb->pkt_type = PACKET_MULTICAST;
1379 }
1380 /*
1381 * This ALLMULTI check should be redundant by 1.4
1382 * so don't forget to remove it.
1383 */
1384
1385 else if (dev->flags & (IFF_PROMISC /*| IFF_ALLMULTI*/)) {
1386 if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
1387 skb->pkt_type = PACKET_OTHERHOST;
1388 }
1389 if (ntohs(eth->h_proto) >= 1536)
1390 return eth->h_proto;
1391
1392 rawp = skb->data;
1393
1394 /*
1395 * This is a magic hack to spot IPX packets. Older Novell breaks
1396 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
1397 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
1398 * won't work for fault tolerant netware but does for the rest.
1399 */
1400 if (*(unsigned short *) rawp == 0xFFFF)
1401 return htons(ETH_P_802_3);
1402 /*
1403 * Real 802.2 LLC
1404 */
1405 return htons(ETH_P_802_2);
1406}
1407
1408
1409/*
1410 * CISCO HDLC keepalive specific stuff
1411 */
1412static struct sk_buff*
1413isdn_net_ciscohdlck_alloc_skb(isdn_net_local *lp, int len)
1414{
1415 unsigned short hl = dev->drv[lp->isdn_device]->interface->hl_hdrlen;
1416 struct sk_buff *skb;
1417
1418 skb = alloc_skb(hl + len, GFP_ATOMIC);
1419 if (skb)
1420 skb_reserve(skb, hl);
1421 else
1422 printk("isdn out of mem at %s:%d!\n", __FILE__, __LINE__);
1423 return skb;
1424}
1425
1426/* cisco hdlck device private ioctls */
3e206b0a 1427static int
1da177e4
LT		 1428isdn_ciscohdlck_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1429{
1430 isdn_net_local *lp = (isdn_net_local *) dev->priv;
1431 unsigned long len = 0;
1432 unsigned long expires = 0;
1433 int tmp = 0;
1434 int period = lp->cisco_keepalive_period;
1435 s8 debserint = lp->cisco_debserint;
1436 int rc = 0;
1437
1438 if (lp->p_encap != ISDN_NET_ENCAP_CISCOHDLCK)
1439 return -EINVAL;
1440
1441 switch (cmd) {
1442 /* get/set keepalive period */
1443 case SIOCGKEEPPERIOD:
1444 len = (unsigned long)sizeof(lp->cisco_keepalive_period);
1445 if (copy_to_user(ifr->ifr_data,
1446 &lp->cisco_keepalive_period, len))
1447 rc = -EFAULT;
1448 break;
1449 case SIOCSKEEPPERIOD:
1450 tmp = lp->cisco_keepalive_period;
1451 len = (unsigned long)sizeof(lp->cisco_keepalive_period);
1452 if (copy_from_user(&period, ifr->ifr_data, len))
1453 rc = -EFAULT;
1454 if ((period > 0) && (period <= 32767))
1455 lp->cisco_keepalive_period = period;
1456 else
1457 rc = -EINVAL;
1458 if (!rc && (tmp != lp->cisco_keepalive_period)) {
1459 expires = (unsigned long)(jiffies +
1460 lp->cisco_keepalive_period * HZ);
1461 mod_timer(&lp->cisco_timer, expires);
1462 printk(KERN_INFO "%s: Keepalive period set "
1463 "to %d seconds.\n",
faca94ff 1464 dev->name, lp->cisco_keepalive_period);
1da177e4
LT		 1465 }
1466 break;
1467
1468 /* get/set debugging */
1469 case SIOCGDEBSERINT:
1470 len = (unsigned long)sizeof(lp->cisco_debserint);
1471 if (copy_to_user(ifr->ifr_data,
1472 &lp->cisco_debserint, len))
1473 rc = -EFAULT;
1474 break;
1475 case SIOCSDEBSERINT:
1476 len = (unsigned long)sizeof(lp->cisco_debserint);
1477 if (copy_from_user(&debserint,
1478 ifr->ifr_data, len))
1479 rc = -EFAULT;
1480 if ((debserint >= 0) && (debserint <= 64))
1481 lp->cisco_debserint = debserint;
1482 else
1483 rc = -EINVAL;
1484 break;
1485
1486 default:
1487 rc = -EINVAL;
1488 break;
1489 }
1490 return (rc);
1491}
1492
1493/* called via cisco_timer.function */
1494static void
1495isdn_net_ciscohdlck_slarp_send_keepalive(unsigned long data)
1496{
1497 isdn_net_local *lp = (isdn_net_local *) data;
1498 struct sk_buff *skb;
1499 unsigned char *p;
1500 unsigned long last_cisco_myseq = lp->cisco_myseq;
1501 int myseq_diff = 0;
1502
1503 if (!(lp->flags & ISDN_NET_CONNECTED) || lp->dialstate) {
1504 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1505 return;
1506 }
1507 lp->cisco_myseq++;
1508
1509 myseq_diff = (lp->cisco_myseq - lp->cisco_mineseen);
1510 if ((lp->cisco_line_state) && ((myseq_diff >= 3)||(myseq_diff <= -3))) {
1511 /* line up -> down */
1512 lp->cisco_line_state = 0;
1513 printk (KERN_WARNING
1514 "UPDOWN: Line protocol on Interface %s,"
faca94ff 1515 " changed state to down\n", lp->netdev->dev->name);
1da177e4
LT		 1516 /* should stop routing higher-level data accross */
1517 } else if ((!lp->cisco_line_state) &&
1518 (myseq_diff >= 0) && (myseq_diff <= 2)) {
1519 /* line down -> up */
1520 lp->cisco_line_state = 1;
1521 printk (KERN_WARNING
1522 "UPDOWN: Line protocol on Interface %s,"
faca94ff 1523 " changed state to up\n", lp->netdev->dev->name);
1da177e4
LT		 1524 /* restart routing higher-level data accross */
1525 }
1526
1527 if (lp->cisco_debserint)
1528 printk (KERN_DEBUG "%s: HDLC "
1529 "myseq %lu, mineseen %lu%c, yourseen %lu, %s\n",
faca94ff 1530 lp->netdev->dev->name, last_cisco_myseq, lp->cisco_mineseen,
1da177e4
LT		 1531 ((last_cisco_myseq == lp->cisco_mineseen) ? '*' : 040),
1532 lp->cisco_yourseq,
1533 ((lp->cisco_line_state) ? "line up" : "line down"));
1534
1535 skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1536 if (!skb)
1537 return;
1538
1539 p = skb_put(skb, 4 + 14);
1540
1541 /* cisco header */
1542 p += put_u8 (p, CISCO_ADDR_UNICAST);
1543 p += put_u8 (p, CISCO_CTRL);
1544 p += put_u16(p, CISCO_TYPE_SLARP);
1545
1546 /* slarp keepalive */
1547 p += put_u32(p, CISCO_SLARP_KEEPALIVE);
1548 p += put_u32(p, lp->cisco_myseq);
1549 p += put_u32(p, lp->cisco_yourseq);
1550 p += put_u16(p, 0xffff); // reliablity, always 0xffff
1551
1552 isdn_net_write_super(lp, skb);
1553
1554 lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1555
1556 add_timer(&lp->cisco_timer);
1557}
1558
1559static void
1560isdn_net_ciscohdlck_slarp_send_request(isdn_net_local *lp)
1561{
1562 struct sk_buff *skb;
1563 unsigned char *p;
1564
1565 skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1566 if (!skb)
1567 return;
1568
1569 p = skb_put(skb, 4 + 14);
1570
1571 /* cisco header */
1572 p += put_u8 (p, CISCO_ADDR_UNICAST);
1573 p += put_u8 (p, CISCO_CTRL);
1574 p += put_u16(p, CISCO_TYPE_SLARP);
1575
1576 /* slarp request */
1577 p += put_u32(p, CISCO_SLARP_REQUEST);
1578 p += put_u32(p, 0); // address
1579 p += put_u32(p, 0); // netmask
1580 p += put_u16(p, 0); // unused
1581
1582 isdn_net_write_super(lp, skb);
1583}
1584
1585static void
1586isdn_net_ciscohdlck_connected(isdn_net_local *lp)
1587{
1588 lp->cisco_myseq = 0;
1589 lp->cisco_mineseen = 0;
1590 lp->cisco_yourseq = 0;
1591 lp->cisco_keepalive_period = ISDN_TIMER_KEEPINT;
1592 lp->cisco_last_slarp_in = 0;
1593 lp->cisco_line_state = 0;
1594 lp->cisco_debserint = 0;
1595
1596 /* send slarp request because interface/seq.no.s reset */
1597 isdn_net_ciscohdlck_slarp_send_request(lp);
1598
1599 init_timer(&lp->cisco_timer);
1600 lp->cisco_timer.data = (unsigned long) lp;
1601 lp->cisco_timer.function = isdn_net_ciscohdlck_slarp_send_keepalive;
1602 lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1603 add_timer(&lp->cisco_timer);
1604}
1605
1606static void
1607isdn_net_ciscohdlck_disconnected(isdn_net_local *lp)
1608{
1609 del_timer(&lp->cisco_timer);
1610}
1611
1612static void
1613isdn_net_ciscohdlck_slarp_send_reply(isdn_net_local *lp)
1614{
1615 struct sk_buff *skb;
1616 unsigned char *p;
1617 struct in_device *in_dev = NULL;
a144ea4b
AV		 1618 __be32 addr = 0; /* local ipv4 address */
1619 __be32 mask = 0; /* local netmask */
1da177e4 1620
d62a38d1 1621 if ((in_dev = lp->netdev->dev->ip_ptr) != NULL) {
1da177e4
LT		 1622 /* take primary(first) address of interface */
1623 struct in_ifaddr *ifa = in_dev->ifa_list;
1624 if (ifa != NULL) {
1625 addr = ifa->ifa_local;
1626 mask = ifa->ifa_mask;
1627 }
1628 }
1629
1630 skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1631 if (!skb)
1632 return;
1633
1634 p = skb_put(skb, 4 + 14);
1635
1636 /* cisco header */
1637 p += put_u8 (p, CISCO_ADDR_UNICAST);
1638 p += put_u8 (p, CISCO_CTRL);
1639 p += put_u16(p, CISCO_TYPE_SLARP);
1640
1641 /* slarp reply, send own ip/netmask; if values are nonsense remote
1642 * should think we are unable to provide it with an address via SLARP */
1643 p += put_u32(p, CISCO_SLARP_REPLY);
1644 p += put_u32(p, addr); // address
1645 p += put_u32(p, mask); // netmask
1646 p += put_u16(p, 0); // unused
1647
1648 isdn_net_write_super(lp, skb);
1649}
1650
1651static void
1652isdn_net_ciscohdlck_slarp_in(isdn_net_local *lp, struct sk_buff *skb)
1653{
1654 unsigned char *p;
1655 int period;
1656 u32 code;
8cf14e38
HH		 1657 u32 my_seq;
1658 u32 your_seq;
1659 __be32 local;
1660 __be32 *addr, *mask;
1da177e4
LT		 1661 u16 unused;
1662
1663 if (skb->len < 14)
1664 return;
1665
1666 p = skb->data;
1667 p += get_u32(p, &code);
1668
1669 switch (code) {
1670 case CISCO_SLARP_REQUEST:
1671 lp->cisco_yourseq = 0;
1672 isdn_net_ciscohdlck_slarp_send_reply(lp);
1673 break;
1674 case CISCO_SLARP_REPLY:
8cf14e38
HH		 1675 addr = (__be32 *)p;
1676 mask = (__be32 *)(p + 4);
1677 if (*mask != cpu_to_be32(0xfffffffc))
1da177e4 1678 goto slarp_reply_out;
8cf14e38
HH		 1679 if ((*addr & cpu_to_be32(3)) == cpu_to_be32(0) ||
1680 (*addr & cpu_to_be32(3)) == cpu_to_be32(3))
1da177e4 1681 goto slarp_reply_out;
8cf14e38
HH		 1682 local = *addr ^ cpu_to_be32(3);
1683 printk(KERN_INFO "%s: got slarp reply: remote ip: %pI4, local ip: %pI4 mask: %pI4\n",
1684 lp->netdev->dev->name, addr, &local, mask);
1da177e4
LT		 1685 break;
1686 slarp_reply_out:
8cf14e38
HH		 1687 printk(KERN_INFO "%s: got invalid slarp reply (%pI4/%pI4) - ignored\n",
1688 lp->netdev->dev->name, addr, mask);
1da177e4
LT		 1689 break;
1690 case CISCO_SLARP_KEEPALIVE:
1691 period = (int)((jiffies - lp->cisco_last_slarp_in
1692 + HZ/2 - 1) / HZ);
1693 if (lp->cisco_debserint &&
1694 (period != lp->cisco_keepalive_period) &&
1695 lp->cisco_last_slarp_in) {
1696 printk(KERN_DEBUG "%s: Keepalive period mismatch - "
1697 "is %d but should be %d.\n",
faca94ff
KK		 1698 lp->netdev->dev->name, period,
1699 lp->cisco_keepalive_period);
1da177e4
LT		 1700 }
1701 lp->cisco_last_slarp_in = jiffies;
1702 p += get_u32(p, &my_seq);
1703 p += get_u32(p, &your_seq);
1704 p += get_u16(p, &unused);
1705 lp->cisco_yourseq = my_seq;
1706 lp->cisco_mineseen = your_seq;
1707 break;
1708 }
1709}
1710
1711static void
1712isdn_net_ciscohdlck_receive(isdn_net_local *lp, struct sk_buff *skb)
1713{
1714 unsigned char *p;
1715 u8 addr;
1716 u8 ctrl;
1717 u16 type;
1718
1719 if (skb->len < 4)
1720 goto out_free;
1721
1722 p = skb->data;
1723 p += get_u8 (p, &addr);
1724 p += get_u8 (p, &ctrl);
1725 p += get_u16(p, &type);
1726 skb_pull(skb, 4);
1727
1728 if (addr != CISCO_ADDR_UNICAST && addr != CISCO_ADDR_BROADCAST) {
1729 printk(KERN_WARNING "%s: Unknown Cisco addr 0x%02x\n",
faca94ff 1730 lp->netdev->dev->name, addr);
1da177e4
LT		 1731 goto out_free;
1732 }
1733 if (ctrl != CISCO_CTRL) {
1734 printk(KERN_WARNING "%s: Unknown Cisco ctrl 0x%02x\n",
faca94ff 1735 lp->netdev->dev->name, ctrl);
1da177e4
LT		 1736 goto out_free;
1737 }
1738
1739 switch (type) {
1740 case CISCO_TYPE_SLARP:
1741 isdn_net_ciscohdlck_slarp_in(lp, skb);
1742 goto out_free;
1743 case CISCO_TYPE_CDP:
1744 if (lp->cisco_debserint)
1745 printk(KERN_DEBUG "%s: Received CDP packet. use "
faca94ff
KK		 1746 "\"no cdp enable\" on cisco.\n",
1747 lp->netdev->dev->name);
1da177e4
LT		 1748 goto out_free;
1749 default:
1750 /* no special cisco protocol */
1751 skb->protocol = htons(type);
1752 netif_rx(skb);
1753 return;
1754 }
1755
1756 out_free:
1757 kfree_skb(skb);
1758}
1759
1760/*
1761 * Got a packet from ISDN-Channel.
1762 */
1763static void
1764isdn_net_receive(struct net_device *ndev, struct sk_buff *skb)
1765{
1766 isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1767 isdn_net_local *olp = lp; /* original 'lp' */
1768#ifdef CONFIG_ISDN_X25
1769 struct concap_proto *cprot = lp -> netdev -> cprot;
1770#endif
1771 lp->transcount += skb->len;
1772
1773 lp->stats.rx_packets++;
1774 lp->stats.rx_bytes += skb->len;
1775 if (lp->master) {
1776 /* Bundling: If device is a slave-device, deliver to master, also
1777 * handle master's statistics and hangup-timeout
1778 */
1779 ndev = lp->master;
1780 lp = (isdn_net_local *) ndev->priv;
1781 lp->stats.rx_packets++;
1782 lp->stats.rx_bytes += skb->len;
1783 }
1784 skb->dev = ndev;
1da177e4 1785 skb->pkt_type = PACKET_HOST;
459a98ed 1786 skb_reset_mac_header(skb);
1da177e4
LT		 1787#ifdef ISDN_DEBUG_NET_DUMP
1788 isdn_dumppkt("R:", skb->data, skb->len, 40);
1789#endif
1790 switch (lp->p_encap) {
1791 case ISDN_NET_ENCAP_ETHER:
1792 /* Ethernet over ISDN */
1793 olp->huptimer = 0;
1794 lp->huptimer = 0;
1795 skb->protocol = isdn_net_type_trans(skb, ndev);
1796 break;
1797 case ISDN_NET_ENCAP_UIHDLC:
1798 /* HDLC with UI-frame (for ispa with -h1 option) */
1799 olp->huptimer = 0;
1800 lp->huptimer = 0;
1801 skb_pull(skb, 2);
1802 /* Fall through */
1803 case ISDN_NET_ENCAP_RAWIP:
1804 /* RAW-IP without MAC-Header */
1805 olp->huptimer = 0;
1806 lp->huptimer = 0;
1807 skb->protocol = htons(ETH_P_IP);
1808 break;
1809 case ISDN_NET_ENCAP_CISCOHDLCK:
1810 isdn_net_ciscohdlck_receive(lp, skb);
1811 return;
1812 case ISDN_NET_ENCAP_CISCOHDLC:
1813 /* CISCO-HDLC IP with type field and fake I-frame-header */
1814 skb_pull(skb, 2);
1815 /* Fall through */
1816 case ISDN_NET_ENCAP_IPTYP:
1817 /* IP with type field */
1818 olp->huptimer = 0;
1819 lp->huptimer = 0;
1820 skb->protocol = *(unsigned short *) &(skb->data[0]);
1821 skb_pull(skb, 2);
1822 if (*(unsigned short *) skb->data == 0xFFFF)
1823 skb->protocol = htons(ETH_P_802_3);
1824 break;
1825#ifdef CONFIG_ISDN_PPP
1826 case ISDN_NET_ENCAP_SYNCPPP:
1827 /* huptimer is done in isdn_ppp_push_higher */
1828 isdn_ppp_receive(lp->netdev, olp, skb);
1829 return;
1830#endif
1831
1832 default:
1833#ifdef CONFIG_ISDN_X25
1834 /* try if there are generic sync_device receiver routines */
1835 if(cprot) if(cprot -> pops)
1836 if( cprot -> pops -> data_ind){
1837 cprot -> pops -> data_ind(cprot,skb);
1838 return;
1839 };
1840#endif /* CONFIG_ISDN_X25 */
1841 printk(KERN_WARNING "%s: unknown encapsulation, dropping\n",
faca94ff 1842 lp->netdev->dev->name);
1da177e4
LT		 1843 kfree_skb(skb);
1844 return;
1845 }
1846
1847 netif_rx(skb);
1848 return;
1849}
1850
1851/*
1852 * A packet arrived via ISDN. Search interface-chain for a corresponding
1853 * interface. If found, deliver packet to receiver-function and return 1,
1854 * else return 0.
1855 */
1856int
1857isdn_net_rcv_skb(int idx, struct sk_buff *skb)
1858{
1859 isdn_net_dev *p = dev->rx_netdev[idx];
1860
1861 if (p) {
1862 isdn_net_local *lp = p->local;
1863 if ((lp->flags & ISDN_NET_CONNECTED) &&
1864 (!lp->dialstate)) {
d62a38d1 1865 isdn_net_receive(p->dev, skb);
1da177e4
LT		 1866 return 1;
1867 }
1868 }
1869 return 0;
1870}
1871
1da177e4
LT		 1872/*
1873 * build an header
1874 * depends on encaps that is being used.
1875 */
1876
3b04ddde
SH		 1877static int isdn_net_header(struct sk_buff *skb, struct net_device *dev,
1878 unsigned short type,
1879 const void *daddr, const void *saddr, unsigned plen)
1da177e4
LT		 1880{
1881 isdn_net_local *lp = dev->priv;
1882 unsigned char *p;
1883 ushort len = 0;
1884
1885 switch (lp->p_encap) {
1886 case ISDN_NET_ENCAP_ETHER:
3b04ddde 1887 len = eth_header(skb, dev, type, daddr, saddr, plen);
1da177e4
LT		 1888 break;
1889#ifdef CONFIG_ISDN_PPP
1890 case ISDN_NET_ENCAP_SYNCPPP:
1891 /* stick on a fake header to keep fragmentation code happy. */
1892 len = IPPP_MAX_HEADER;
1893 skb_push(skb,len);
1894 break;
1895#endif
1896 case ISDN_NET_ENCAP_RAWIP:
1897 printk(KERN_WARNING "isdn_net_header called with RAW_IP!\n");
1898 len = 0;
1899 break;
1900 case ISDN_NET_ENCAP_IPTYP:
1901 /* ethernet type field */
1902 *((ushort *) skb_push(skb, 2)) = htons(type);
1903 len = 2;
1904 break;
1905 case ISDN_NET_ENCAP_UIHDLC:
1906 /* HDLC with UI-Frames (for ispa with -h1 option) */
1907 *((ushort *) skb_push(skb, 2)) = htons(0x0103);
1908 len = 2;
1909 break;
1910 case ISDN_NET_ENCAP_CISCOHDLC:
1911 case ISDN_NET_ENCAP_CISCOHDLCK:
1912 p = skb_push(skb, 4);
1913 p += put_u8 (p, CISCO_ADDR_UNICAST);
1914 p += put_u8 (p, CISCO_CTRL);
1915 p += put_u16(p, type);
1916 len = 4;
1917 break;
1918#ifdef CONFIG_ISDN_X25
1919 default:
1920 /* try if there are generic concap protocol routines */
1921 if( lp-> netdev -> cprot ){
1922 printk(KERN_WARNING "isdn_net_header called with concap_proto!\n");
1923 len = 0;
1924 break;
1925 }
1926 break;
1927#endif /* CONFIG_ISDN_X25 */
1928 }
1929 return len;
1930}
1931
1932/* We don't need to send arp, because we have point-to-point connections. */
1933static int
1934isdn_net_rebuild_header(struct sk_buff *skb)
1935{
1936 struct net_device *dev = skb->dev;
1937 isdn_net_local *lp = dev->priv;
1938 int ret = 0;
1939
1940 if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
1941 struct ethhdr *eth = (struct ethhdr *) skb->data;
1942
1943 /*
1944 * Only ARP/IP is currently supported
1945 */
1946
1947 if (eth->h_proto != htons(ETH_P_IP)) {
1948 printk(KERN_WARNING
1949 "isdn_net: %s don't know how to resolve type %d addresses?\n",
1950 dev->name, (int) eth->h_proto);
1951 memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
1952 return 0;
1953 }
1954 /*
1955 * Try to get ARP to resolve the header.
1956 */
1957#ifdef CONFIG_INET
1958 ret = arp_find(eth->h_dest, skb);
1959#endif
1960 }
1961 return ret;
1962}
1963
3b04ddde
SH		 1964static int isdn_header_cache(const struct neighbour *neigh, struct hh_cache *hh)
1965{
1966 const struct net_device *dev = neigh->dev;
1967 isdn_net_local *lp = dev->priv;
1968
1969 if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
1970 return eth_header_cache(neigh, hh);
1971 return -1;
1972}
1973
1974static void isdn_header_cache_update(struct hh_cache *hh,
1975 const struct net_device *dev,
1976 const unsigned char *haddr)
1977{
1978 isdn_net_local *lp = dev->priv;
1979 if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
1980 return eth_header_cache_update(hh, dev, haddr);
1981}
1982
1983static const struct header_ops isdn_header_ops = {
1984 .create = isdn_net_header,
1985 .rebuild = isdn_net_rebuild_header,
1986 .cache = isdn_header_cache,
1987 .cache_update = isdn_header_cache_update,
1988};
1989
1da177e4
LT		 1990/*
1991 * Interface-setup. (just after registering a new interface)
1992 */
1993static int
1994isdn_net_init(struct net_device *ndev)
1995{
1996 ushort max_hlhdr_len = 0;
3b04ddde 1997 int drvidx;
1da177e4
LT		 1998
1999 ether_setup(ndev);
3b04ddde 2000 ndev->header_ops = NULL;
1da177e4
LT		 2001
2002 /* Setup the generic properties */
1da177e4
LT		 2003 ndev->mtu = 1500;
2004 ndev->flags = IFF_NOARP|IFF_POINTOPOINT;
2005 ndev->type = ARPHRD_ETHER;
2006 ndev->addr_len = ETH_ALEN;
d2dcba61 2007 ndev->validate_addr = NULL;
1da177e4
LT		 2008
2009 /* for clients with MPPP maybe higher values better */
2010 ndev->tx_queue_len = 30;
2011
1da177e4
LT		 2012 /* The ISDN-specific entries in the device structure. */
2013 ndev->open = &isdn_net_open;
2014 ndev->hard_start_xmit = &isdn_net_start_xmit;
2015
2016 /*
2017 * up till binding we ask the protocol layer to reserve as much
2018 * as we might need for HL layer
2019 */
2020
2021 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2022 if (dev->drv[drvidx])
2023 if (max_hlhdr_len < dev->drv[drvidx]->interface->hl_hdrlen)
2024 max_hlhdr_len = dev->drv[drvidx]->interface->hl_hdrlen;
2025
2026 ndev->hard_header_len = ETH_HLEN + max_hlhdr_len;
2027 ndev->stop = &isdn_net_close;
2028 ndev->get_stats = &isdn_net_get_stats;
1da177e4
LT		 2029 ndev->do_ioctl = NULL;
2030 return 0;
2031}
2032
2033static void
2034isdn_net_swapbind(int drvidx)
2035{
2036 isdn_net_dev *p;
2037
2038#ifdef ISDN_DEBUG_NET_ICALL
2039 printk(KERN_DEBUG "n_fi: swapping ch of %d\n", drvidx);
2040#endif
2041 p = dev->netdev;
2042 while (p) {
2043 if (p->local->pre_device == drvidx)
2044 switch (p->local->pre_channel) {
2045 case 0:
2046 p->local->pre_channel = 1;
2047 break;
2048 case 1:
2049 p->local->pre_channel = 0;
2050 break;
2051 }
2052 p = (isdn_net_dev *) p->next;
2053 }
2054}
2055
2056static void
2057isdn_net_swap_usage(int i1, int i2)
2058{
2059 int u1 = dev->usage[i1] & ISDN_USAGE_EXCLUSIVE;
2060 int u2 = dev->usage[i2] & ISDN_USAGE_EXCLUSIVE;
2061
2062#ifdef ISDN_DEBUG_NET_ICALL
2063 printk(KERN_DEBUG "n_fi: usage of %d and %d\n", i1, i2);
2064#endif
2065 dev->usage[i1] &= ~ISDN_USAGE_EXCLUSIVE;
2066 dev->usage[i1] |= u2;
2067 dev->usage[i2] &= ~ISDN_USAGE_EXCLUSIVE;
2068 dev->usage[i2] |= u1;
2069 isdn_info_update();
2070}
2071
2072/*
2073 * An incoming call-request has arrived.
2074 * Search the interface-chain for an appropriate interface.
2075 * If found, connect the interface to the ISDN-channel and initiate
2076 * D- and B-Channel-setup. If secure-flag is set, accept only
2077 * configured phone-numbers. If callback-flag is set, initiate
2078 * callback-dialing.
2079 *
2080 * Return-Value: 0 = No appropriate interface for this call.
2081 * 1 = Call accepted
2082 * 2 = Reject call, wait cbdelay, then call back
2083 * 3 = Reject call
2084 * 4 = Wait cbdelay, then call back
2085 * 5 = No appropriate interface for this call,
2086 * would eventually match if CID was longer.
2087 */
2088
2089int
2090isdn_net_find_icall(int di, int ch, int idx, setup_parm *setup)
2091{
2092 char *eaz;
2093 int si1;
2094 int si2;
2095 int ematch;
2096 int wret;
2097 int swapped;
2098 int sidx = 0;
2099 u_long flags;
2100 isdn_net_dev *p;
2101 isdn_net_phone *n;
0f13864e 2102 char nr[ISDN_MSNLEN];
1da177e4
LT		 2103 char *my_eaz;
2104
2105 /* Search name in netdev-chain */
2106 if (!setup->phone[0]) {
2107 nr[0] = '0';
2108 nr[1] = '\0';
2109 printk(KERN_INFO "isdn_net: Incoming call without OAD, assuming '0'\n");
2110 } else
0f13864e 2111 strlcpy(nr, setup->phone, ISDN_MSNLEN);
1da177e4
LT		 2112 si1 = (int) setup->si1;
2113 si2 = (int) setup->si2;
2114 if (!setup->eazmsn[0]) {
2115 printk(KERN_WARNING "isdn_net: Incoming call without CPN, assuming '0'\n");
2116 eaz = "0";
2117 } else
2118 eaz = setup->eazmsn;
2119 if (dev->net_verbose > 1)
2120 printk(KERN_INFO "isdn_net: call from %s,%d,%d -> %s\n", nr, si1, si2, eaz);
2121 /* Accept DATA and VOICE calls at this stage
2122 * local eaz is checked later for allowed call types
2123 */
2124 if ((si1 != 7) && (si1 != 1)) {
2125 if (dev->net_verbose > 1)
2126 printk(KERN_INFO "isdn_net: Service-Indicator not 1 or 7, ignored\n");
2127 return 0;
2128 }
2129 n = (isdn_net_phone *) 0;
2130 p = dev->netdev;
2131 ematch = wret = swapped = 0;
2132#ifdef ISDN_DEBUG_NET_ICALL
2133 printk(KERN_DEBUG "n_fi: di=%d ch=%d idx=%d usg=%d\n", di, ch, idx,
2134 dev->usage[idx]);
2135#endif
2136 while (p) {
2137 int matchret;
2138 isdn_net_local *lp = p->local;
2139
2140 /* If last check has triggered as binding-swap, revert it */
2141 switch (swapped) {
2142 case 2:
2143 isdn_net_swap_usage(idx, sidx);
2144 /* fall through */
2145 case 1:
2146 isdn_net_swapbind(di);
2147 break;
2148 }
2149 swapped = 0;
2150 /* check acceptable call types for DOV */
2151 my_eaz = isdn_map_eaz2msn(lp->msn, di);
2152 if (si1 == 1) { /* it's a DOV call, check if we allow it */
2153 if (*my_eaz == 'v' || *my_eaz == 'V' ||
2154 *my_eaz == 'b' || *my_eaz == 'B')
2155 my_eaz++; /* skip to allow a match */
2156 else
2157 my_eaz = NULL; /* force non match */
2158 } else { /* it's a DATA call, check if we allow it */
2159 if (*my_eaz == 'b' || *my_eaz == 'B')
2160 my_eaz++; /* skip to allow a match */
2161 }
2162 if (my_eaz)
2163 matchret = isdn_msncmp(eaz, my_eaz);
2164 else
2165 matchret = 1;
2166 if (!matchret)
2167 ematch = 1;
2168
2169 /* Remember if more numbers eventually can match */
2170 if (matchret > wret)
2171 wret = matchret;
2172#ifdef ISDN_DEBUG_NET_ICALL
2173 printk(KERN_DEBUG "n_fi: if='%s', l.msn=%s, l.flags=%d, l.dstate=%d\n",
faca94ff 2174 p->dev->name, lp->msn, lp->flags, lp->dialstate);
1da177e4
LT		 2175#endif
2176 if ((!matchret) && /* EAZ is matching */
2177 (((!(lp->flags & ISDN_NET_CONNECTED)) && /* but not connected */
2178 (USG_NONE(dev->usage[idx]))) || /* and ch. unused or */
2179 ((((lp->dialstate == 4) || (lp->dialstate == 12)) && /* if dialing */
2180 (!(lp->flags & ISDN_NET_CALLBACK))) /* but no callback */
2181 )))
2182 {
2183#ifdef ISDN_DEBUG_NET_ICALL
2184 printk(KERN_DEBUG "n_fi: match1, pdev=%d pch=%d\n",
2185 lp->pre_device, lp->pre_channel);
2186#endif
2187 if (dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) {
2188 if ((lp->pre_channel != ch) ||
2189 (lp->pre_device != di)) {
2190 /* Here we got a problem:
2191 * If using an ICN-Card, an incoming call is always signaled on
2192 * on the first channel of the card, if both channels are
2193 * down. However this channel may be bound exclusive. If the
2194 * second channel is free, this call should be accepted.
2195 * The solution is horribly but it runs, so what:
2196 * We exchange the exclusive bindings of the two channels, the
2197 * corresponding variables in the interface-structs.
2198 */
2199 if (ch == 0) {
2200 sidx = isdn_dc2minor(di, 1);
2201#ifdef ISDN_DEBUG_NET_ICALL
2202 printk(KERN_DEBUG "n_fi: ch is 0\n");
2203#endif
2204 if (USG_NONE(dev->usage[sidx])) {
2205 /* Second Channel is free, now see if it is bound
2206 * exclusive too. */
2207 if (dev->usage[sidx] & ISDN_USAGE_EXCLUSIVE) {
2208#ifdef ISDN_DEBUG_NET_ICALL
2209 printk(KERN_DEBUG "n_fi: 2nd channel is down and bound\n");
2210#endif
2211 /* Yes, swap bindings only, if the original
2212 * binding is bound to channel 1 of this driver */
2213 if ((lp->pre_device == di) &&
2214 (lp->pre_channel == 1)) {
2215 isdn_net_swapbind(di);
2216 swapped = 1;
2217 } else {
2218 /* ... else iterate next device */
2219 p = (isdn_net_dev *) p->next;
2220 continue;
2221 }
2222 } else {
2223#ifdef ISDN_DEBUG_NET_ICALL
2224 printk(KERN_DEBUG "n_fi: 2nd channel is down and unbound\n");
2225#endif
2226 /* No, swap always and swap excl-usage also */
2227 isdn_net_swap_usage(idx, sidx);
2228 isdn_net_swapbind(di);
2229 swapped = 2;
2230 }
2231 /* Now check for exclusive binding again */
2232#ifdef ISDN_DEBUG_NET_ICALL
2233 printk(KERN_DEBUG "n_fi: final check\n");
2234#endif
2235 if ((dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) &&
2236 ((lp->pre_channel != ch) ||
2237 (lp->pre_device != di))) {
2238#ifdef ISDN_DEBUG_NET_ICALL
2239 printk(KERN_DEBUG "n_fi: final check failed\n");
2240#endif
2241 p = (isdn_net_dev *) p->next;
2242 continue;
2243 }
2244 }
2245 } else {
2246 /* We are already on the second channel, so nothing to do */
2247#ifdef ISDN_DEBUG_NET_ICALL
2248 printk(KERN_DEBUG "n_fi: already on 2nd channel\n");
2249#endif
2250 }
2251 }
2252 }
2253#ifdef ISDN_DEBUG_NET_ICALL
2254 printk(KERN_DEBUG "n_fi: match2\n");
2255#endif
2256 n = lp->phone[0];
2257 if (lp->flags & ISDN_NET_SECURE) {
2258 while (n) {
2259 if (!isdn_msncmp(nr, n->num))
2260 break;
2261 n = (isdn_net_phone *) n->next;
2262 }
2263 }
2264 if (n || (!(lp->flags & ISDN_NET_SECURE))) {
2265#ifdef ISDN_DEBUG_NET_ICALL
2266 printk(KERN_DEBUG "n_fi: match3\n");
2267#endif
2268 /* matching interface found */
2269
2270 /*
2271 * Is the state STOPPED?
2272 * If so, no dialin is allowed,
2273 * so reject actively.
2274 * */
2275 if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2276 printk(KERN_INFO "incoming call, interface %s `stopped' -> rejected\n",
faca94ff 2277 p->dev->name);
1da177e4
LT		 2278 return 3;
2279 }
2280 /*
2281 * Is the interface up?
2282 * If not, reject the call actively.
2283 */
2284 if (!isdn_net_device_started(p)) {
2285 printk(KERN_INFO "%s: incoming call, interface down -> rejected\n",
faca94ff 2286 p->dev->name);
1da177e4
LT		 2287 return 3;
2288 }
2289 /* Interface is up, now see if it's a slave. If so, see if
2290 * it's master and parent slave is online. If not, reject the call.
2291 */
2292 if (lp->master) {
2293 isdn_net_local *mlp = (isdn_net_local *) lp->master->priv;
faca94ff
KK		 2294 printk(KERN_DEBUG "ICALLslv: %s\n", p->dev->name);
2295 printk(KERN_DEBUG "master=%s\n", lp->master->name);
1da177e4
LT		 2296 if (mlp->flags & ISDN_NET_CONNECTED) {
2297 printk(KERN_DEBUG "master online\n");
2298 /* Master is online, find parent-slave (master if first slave) */
2299 while (mlp->slave) {
2300 if ((isdn_net_local *) mlp->slave->priv == lp)
2301 break;
2302 mlp = (isdn_net_local *) mlp->slave->priv;
2303 }
2304 } else
2305 printk(KERN_DEBUG "master offline\n");
2306 /* Found parent, if it's offline iterate next device */
2307 printk(KERN_DEBUG "mlpf: %d\n", mlp->flags & ISDN_NET_CONNECTED);
2308 if (!(mlp->flags & ISDN_NET_CONNECTED)) {
2309 p = (isdn_net_dev *) p->next;
2310 continue;
2311 }
2312 }
2313 if (lp->flags & ISDN_NET_CALLBACK) {
2314 int chi;
2315 /*
2316 * Is the state MANUAL?
2317 * If so, no callback can be made,
2318 * so reject actively.
2319 * */
2320 if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2321 printk(KERN_INFO "incoming call for callback, interface %s `off' -> rejected\n",
faca94ff 2322 p->dev->name);
1da177e4
LT		 2323 return 3;
2324 }
2325 printk(KERN_DEBUG "%s: call from %s -> %s, start callback\n",
faca94ff 2326 p->dev->name, nr, eaz);
1da177e4
LT		 2327 if (lp->phone[1]) {
2328 /* Grab a free ISDN-Channel */
2329 spin_lock_irqsave(&dev->lock, flags);
2330 if ((chi =
2331 isdn_get_free_channel(
2332 ISDN_USAGE_NET,
2333 lp->l2_proto,
2334 lp->l3_proto,
2335 lp->pre_device,
2336 lp->pre_channel,
2337 lp->msn)
2338 ) < 0) {
2339
faca94ff
KK		 2340 printk(KERN_WARNING "isdn_net_find_icall: No channel for %s\n",
2341 p->dev->name);
1da177e4
LT		 2342 spin_unlock_irqrestore(&dev->lock, flags);
2343 return 0;
2344 }
2345 /* Setup dialstate. */
2346 lp->dtimer = 0;
2347 lp->dialstate = 11;
2348 /* Connect interface with channel */
2349 isdn_net_bind_channel(lp, chi);
2350#ifdef CONFIG_ISDN_PPP
2351 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2352 if (isdn_ppp_bind(lp) < 0) {
2353 spin_unlock_irqrestore(&dev->lock, flags);
2354 isdn_net_unbind_channel(lp);
2355 return 0;
2356 }
2357#endif
2358 spin_unlock_irqrestore(&dev->lock, flags);
2359 /* Initiate dialing by returning 2 or 4 */
2360 return (lp->flags & ISDN_NET_CBHUP) ? 2 : 4;
2361 } else
faca94ff
KK		 2362 printk(KERN_WARNING "isdn_net: %s: No phone number\n",
2363 p->dev->name);
1da177e4
LT		 2364 return 0;
2365 } else {
faca94ff
KK		 2366 printk(KERN_DEBUG "%s: call from %s -> %s accepted\n",
2367 p->dev->name, nr, eaz);
1da177e4
LT		 2368 /* if this interface is dialing, it does it probably on a different
2369 device, so free this device */
2370 if ((lp->dialstate == 4) || (lp->dialstate == 12)) {
2371#ifdef CONFIG_ISDN_PPP
2372 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2373 isdn_ppp_free(lp);
2374#endif
2375 isdn_net_lp_disconnected(lp);
2376 isdn_free_channel(lp->isdn_device, lp->isdn_channel,
2377 ISDN_USAGE_NET);
2378 }
2379 spin_lock_irqsave(&dev->lock, flags);
2380 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2381 dev->usage[idx] |= ISDN_USAGE_NET;
2382 strcpy(dev->num[idx], nr);
2383 isdn_info_update();
2384 dev->st_netdev[idx] = lp->netdev;
2385 lp->isdn_device = di;
2386 lp->isdn_channel = ch;
2387 lp->ppp_slot = -1;
2388 lp->flags |= ISDN_NET_CONNECTED;
2389 lp->dialstate = 7;
2390 lp->dtimer = 0;
2391 lp->outgoing = 0;
2392 lp->huptimer = 0;
2393 lp->hupflags |= ISDN_WAITCHARGE;
2394 lp->hupflags &= ~ISDN_HAVECHARGE;
2395#ifdef CONFIG_ISDN_PPP
2396 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
2397 if (isdn_ppp_bind(lp) < 0) {
2398 isdn_net_unbind_channel(lp);
2399 spin_unlock_irqrestore(&dev->lock, flags);
2400 return 0;
2401 }
2402 }
2403#endif
2404 spin_unlock_irqrestore(&dev->lock, flags);
2405 return 1;
2406 }
2407 }
2408 }
2409 p = (isdn_net_dev *) p->next;
2410 }
2411 /* If none of configured EAZ/MSN matched and not verbose, be silent */
2412 if (!ematch || dev->net_verbose)
2413 printk(KERN_INFO "isdn_net: call from %s -> %d %s ignored\n", nr, di, eaz);
2414 return (wret == 2)?5:0;
2415}
2416
2417/*
2418 * Search list of net-interfaces for an interface with given name.
2419 */
2420isdn_net_dev *
2421isdn_net_findif(char *name)
2422{
2423 isdn_net_dev *p = dev->netdev;
2424
2425 while (p) {
faca94ff 2426 if (!strcmp(p->dev->name, name))
1da177e4
LT		 2427 return p;
2428 p = (isdn_net_dev *) p->next;
2429 }
2430 return (isdn_net_dev *) NULL;
2431}
2432
2433/*
2434 * Force a net-interface to dial out.
2435 * This is called from the userlevel-routine below or
2436 * from isdn_net_start_xmit().
2437 */
3e206b0a 2438static int
1da177e4
LT		 2439isdn_net_force_dial_lp(isdn_net_local * lp)
2440{
2441 if ((!(lp->flags & ISDN_NET_CONNECTED)) && !lp->dialstate) {
2442 int chi;
2443 if (lp->phone[1]) {
2444 ulong flags;
2445
2446 /* Grab a free ISDN-Channel */
2447 spin_lock_irqsave(&dev->lock, flags);
2448 if ((chi = isdn_get_free_channel(
2449 ISDN_USAGE_NET,
2450 lp->l2_proto,
2451 lp->l3_proto,
2452 lp->pre_device,
2453 lp->pre_channel,
2454 lp->msn)) < 0) {
faca94ff
KK		 2455 printk(KERN_WARNING "isdn_net_force_dial: No channel for %s\n",
2456 lp->netdev->dev->name);
1da177e4
LT		 2457 spin_unlock_irqrestore(&dev->lock, flags);
2458 return -EAGAIN;
2459 }
2460 lp->dialstate = 1;
2461 /* Connect interface with channel */
2462 isdn_net_bind_channel(lp, chi);
2463#ifdef CONFIG_ISDN_PPP
2464 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2465 if (isdn_ppp_bind(lp) < 0) {
2466 isdn_net_unbind_channel(lp);
2467 spin_unlock_irqrestore(&dev->lock, flags);
2468 return -EAGAIN;
2469 }
2470#endif
2471 /* Initiate dialing */
2472 spin_unlock_irqrestore(&dev->lock, flags);
2473 isdn_net_dial();
2474 return 0;
2475 } else
2476 return -EINVAL;
2477 } else
2478 return -EBUSY;
2479}
2480
2481/*
2482 * This is called from certain upper protocol layers (multilink ppp
2483 * and x25iface encapsulation module) that want to initiate dialing
2484 * themselves.
2485 */
2486int
2487isdn_net_dial_req(isdn_net_local * lp)
2488{
2489 /* is there a better error code? */
2490 if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) return -EBUSY;
2491
2492 return isdn_net_force_dial_lp(lp);
2493}
2494
2495/*
2496 * Force a net-interface to dial out.
2497 * This is always called from within userspace (ISDN_IOCTL_NET_DIAL).
2498 */
2499int
2500isdn_net_force_dial(char *name)
2501{
2502 isdn_net_dev *p = isdn_net_findif(name);
2503
2504 if (!p)
2505 return -ENODEV;
2506 return (isdn_net_force_dial_lp(p->local));
2507}
2508
d62a38d1
KK		 2509/*
2510 * Helper for alloc_netdev()
2511 */
2512static void _isdn_setup(struct net_device *dev)
2513{
2514 isdn_net_local *lp = dev->priv;
2515
2516 dev->flags = IFF_NOARP | IFF_POINTOPOINT;
2517 lp->p_encap = ISDN_NET_ENCAP_RAWIP;
2518 lp->magic = ISDN_NET_MAGIC;
2519 lp->last = lp;
2520 lp->next = lp;
2521 lp->isdn_device = -1;
2522 lp->isdn_channel = -1;
2523 lp->pre_device = -1;
2524 lp->pre_channel = -1;
2525 lp->exclusive = -1;
2526 lp->ppp_slot = -1;
2527 lp->pppbind = -1;
2528 skb_queue_head_init(&lp->super_tx_queue);
2529 lp->l2_proto = ISDN_PROTO_L2_X75I;
2530 lp->l3_proto = ISDN_PROTO_L3_TRANS;
2531 lp->triggercps = 6000;
2532 lp->slavedelay = 10 * HZ;
2533 lp->hupflags = ISDN_INHUP; /* Do hangup even on incoming calls */
2534 lp->onhtime = 10; /* Default hangup-time for saving costs */
2535 lp->dialmax = 1;
2536 /* Hangup before Callback, manual dial */
2537 lp->flags = ISDN_NET_CBHUP | ISDN_NET_DM_MANUAL;
2538 lp->cbdelay = 25; /* Wait 5 secs before Callback */
2539 lp->dialtimeout = -1; /* Infinite Dial-Timeout */
2540 lp->dialwait = 5 * HZ; /* Wait 5 sec. after failed dial */
2541 lp->dialstarted = 0; /* Jiffies of last dial-start */
2542 lp->dialwait_timer = 0; /* Jiffies of earliest next dial-start */
2543}
2544
1da177e4
LT		 2545/*
2546 * Allocate a new network-interface and initialize its data structures.
2547 */
2548char *
2549isdn_net_new(char *name, struct net_device *master)
2550{
2551 isdn_net_dev *netdev;
2552
2553 /* Avoid creating an existing interface */
2554 if (isdn_net_findif(name)) {
2555 printk(KERN_WARNING "isdn_net: interface %s already exists\n", name);
2556 return NULL;
2557 }
d62a38d1 2558 if (name == NULL)
faca94ff 2559 return NULL;
41f96935 2560 if (!(netdev = kzalloc(sizeof(isdn_net_dev), GFP_KERNEL))) {
1da177e4
LT		 2561 printk(KERN_WARNING "isdn_net: Could not allocate net-device\n");
2562 return NULL;
2563 }
d62a38d1
KK		 2564 netdev->dev = alloc_netdev(sizeof(isdn_net_local), name, _isdn_setup);
2565 if (!netdev->dev) {
2566 printk(KERN_WARNING "isdn_net: Could not allocate network device\n");
1da177e4
LT		 2567 kfree(netdev);
2568 return NULL;
2569 }
d62a38d1 2570 netdev->local = netdev->dev->priv;
d62a38d1 2571 netdev->dev->init = isdn_net_init;
1da177e4
LT		 2572 if (master) {
2573 /* Device shall be a slave */
2574 struct net_device *p = (((isdn_net_local *) master->priv)->slave);
2575 struct net_device *q = master;
2576
2577 netdev->local->master = master;
2578 /* Put device at end of slave-chain */
2579 while (p) {
2580 q = p;
2581 p = (((isdn_net_local *) p->priv)->slave);
2582 }
d62a38d1 2583 ((isdn_net_local *) q->priv)->slave = netdev->dev;
1da177e4
LT		 2584 } else {
2585 /* Device shall be a master */
2586 /*
2587 * Watchdog timer (currently) for master only.
2588 */
d62a38d1
KK		 2589 netdev->dev->tx_timeout = isdn_net_tx_timeout;
2590 netdev->dev->watchdog_timeo = ISDN_NET_TX_TIMEOUT;
2591 if (register_netdev(netdev->dev) != 0) {
1da177e4 2592 printk(KERN_WARNING "isdn_net: Could not register net-device\n");
d62a38d1 2593 free_netdev(netdev->dev);
1da177e4
LT		 2594 kfree(netdev);
2595 return NULL;
2596 }
2597 }
1da177e4
LT		 2598 netdev->queue = netdev->local;
2599 spin_lock_init(&netdev->queue_lock);
2600
1da177e4 2601 netdev->local->netdev = netdev;
1da177e4 2602
c4028958 2603 INIT_WORK(&netdev->local->tqueue, isdn_net_softint);
1da177e4
LT		 2604 spin_lock_init(&netdev->local->xmit_lock);
2605
1da177e4
LT		 2606 /* Put into to netdev-chain */
2607 netdev->next = (void *) dev->netdev;
2608 dev->netdev = netdev;
d62a38d1 2609 return netdev->dev->name;
1da177e4
LT		 2610}
2611
2612char *
2613isdn_net_newslave(char *parm)
2614{
2615 char *p = strchr(parm, ',');
2616 isdn_net_dev *n;
2617 char newname[10];
2618
2619 if (p) {
2620 /* Slave-Name MUST not be empty */
2621 if (!strlen(p + 1))
2622 return NULL;
2623 strcpy(newname, p + 1);
2624 *p = 0;
2625 /* Master must already exist */
2626 if (!(n = isdn_net_findif(parm)))
2627 return NULL;
2628 /* Master must be a real interface, not a slave */
2629 if (n->local->master)
2630 return NULL;
2631 /* Master must not be started yet */
2632 if (isdn_net_device_started(n))
2633 return NULL;
d62a38d1 2634 return (isdn_net_new(newname, n->dev));
1da177e4
LT		 2635 }
2636 return NULL;
2637}
2638
2639/*
2640 * Set interface-parameters.
2641 * Always set all parameters, so the user-level application is responsible
2642 * for not overwriting existing setups. It has to get the current
2643 * setup first, if only selected parameters are to be changed.
2644 */
2645int
2646isdn_net_setcfg(isdn_net_ioctl_cfg * cfg)
2647{
2648 isdn_net_dev *p = isdn_net_findif(cfg->name);
2649 ulong features;
2650 int i;
2651 int drvidx;
2652 int chidx;
2653 char drvid[25];
2654
2655 if (p) {
2656 isdn_net_local *lp = p->local;
2657
2658 /* See if any registered driver supports the features we want */
2659 features = ((1 << cfg->l2_proto) << ISDN_FEATURE_L2_SHIFT) |
2660 ((1 << cfg->l3_proto) << ISDN_FEATURE_L3_SHIFT);
2661 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2662 if (dev->drv[i])
2663 if ((dev->drv[i]->interface->features & features) == features)
2664 break;
2665 if (i == ISDN_MAX_DRIVERS) {
2666 printk(KERN_WARNING "isdn_net: No driver with selected features\n");
2667 return -ENODEV;
2668 }
2669 if (lp->p_encap != cfg->p_encap){
2670#ifdef CONFIG_ISDN_X25
2671 struct concap_proto * cprot = p -> cprot;
2672#endif
2673 if (isdn_net_device_started(p)) {
2674 printk(KERN_WARNING "%s: cannot change encap when if is up\n",
faca94ff 2675 p->dev->name);
1da177e4
LT		 2676 return -EBUSY;
2677 }
2678#ifdef CONFIG_ISDN_X25
2679 if( cprot && cprot -> pops )
2680 cprot -> pops -> proto_del ( cprot );
2681 p -> cprot = NULL;
2682 lp -> dops = NULL;
2683 /* ... , prepare for configuration of new one ... */
2684 switch ( cfg -> p_encap ){
2685 case ISDN_NET_ENCAP_X25IFACE:
2686 lp -> dops = &isdn_concap_reliable_dl_dops;
2687 }
2688 /* ... and allocate new one ... */
2689 p -> cprot = isdn_concap_new( cfg -> p_encap );
2690 /* p -> cprot == NULL now if p_encap is not supported
2691 by means of the concap_proto mechanism */
2692 /* the protocol is not configured yet; this will
2693 happen later when isdn_net_reset() is called */
2694#endif
2695 }
2696 switch ( cfg->p_encap ) {
2697 case ISDN_NET_ENCAP_SYNCPPP:
2698#ifndef CONFIG_ISDN_PPP
2699 printk(KERN_WARNING "%s: SyncPPP support not configured\n",
faca94ff 2700 p->dev->name);
1da177e4
LT		 2701 return -EINVAL;
2702#else
d62a38d1
KK		 2703 p->dev->type = ARPHRD_PPP; /* change ARP type */
2704 p->dev->addr_len = 0;
2705 p->dev->do_ioctl = isdn_ppp_dev_ioctl;
1da177e4
LT		 2706#endif
2707 break;
2708 case ISDN_NET_ENCAP_X25IFACE:
2709#ifndef CONFIG_ISDN_X25
2710 printk(KERN_WARNING "%s: isdn-x25 support not configured\n",
c749b013 2711 p->dev->name);
1da177e4
LT		 2712 return -EINVAL;
2713#else
d62a38d1
KK		 2714 p->dev->type = ARPHRD_X25; /* change ARP type */
2715 p->dev->addr_len = 0;
1da177e4
LT		 2716#endif
2717 break;
2718 case ISDN_NET_ENCAP_CISCOHDLCK:
d62a38d1 2719 p->dev->do_ioctl = isdn_ciscohdlck_dev_ioctl;
1da177e4
LT		 2720 break;
2721 default:
2722 if( cfg->p_encap >= 0 &&
2723 cfg->p_encap <= ISDN_NET_ENCAP_MAX_ENCAP )
2724 break;
2725 printk(KERN_WARNING
2726 "%s: encapsulation protocol %d not supported\n",
faca94ff 2727 p->dev->name, cfg->p_encap);
1da177e4
LT		 2728 return -EINVAL;
2729 }
2730 if (strlen(cfg->drvid)) {
2731 /* A bind has been requested ... */
2732 char *c,
2733 *e;
2734
2735 drvidx = -1;
2736 chidx = -1;
2737 strcpy(drvid, cfg->drvid);
2738 if ((c = strchr(drvid, ','))) {
2739 /* The channel-number is appended to the driver-Id with a comma */
2740 chidx = (int) simple_strtoul(c + 1, &e, 10);
2741 if (e == c)
2742 chidx = -1;
2743 *c = '\0';
2744 }
2745 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2746 /* Lookup driver-Id in array */
2747 if (!(strcmp(dev->drvid[i], drvid))) {
2748 drvidx = i;
2749 break;
2750 }
2751 if ((drvidx == -1) || (chidx == -1))
2752 /* Either driver-Id or channel-number invalid */
2753 return -ENODEV;
2754 } else {
2755 /* Parameters are valid, so get them */
2756 drvidx = lp->pre_device;
2757 chidx = lp->pre_channel;
2758 }
2759 if (cfg->exclusive > 0) {
2760 unsigned long flags;
2761
2762 /* If binding is exclusive, try to grab the channel */
2763 spin_lock_irqsave(&dev->lock, flags);
2764 if ((i = isdn_get_free_channel(ISDN_USAGE_NET,
2765 lp->l2_proto, lp->l3_proto, drvidx,
2766 chidx, lp->msn)) < 0) {
2767 /* Grab failed, because desired channel is in use */
2768 lp->exclusive = -1;
2769 spin_unlock_irqrestore(&dev->lock, flags);
2770 return -EBUSY;
2771 }
2772 /* All went ok, so update isdninfo */
2773 dev->usage[i] = ISDN_USAGE_EXCLUSIVE;
2774 isdn_info_update();
2775 spin_unlock_irqrestore(&dev->lock, flags);
2776 lp->exclusive = i;
2777 } else {
2778 /* Non-exclusive binding or unbind. */
2779 lp->exclusive = -1;
2780 if ((lp->pre_device != -1) && (cfg->exclusive == -1)) {
2781 isdn_unexclusive_channel(lp->pre_device, lp->pre_channel);
2782 isdn_free_channel(lp->pre_device, lp->pre_channel, ISDN_USAGE_NET);
2783 drvidx = -1;
2784 chidx = -1;
2785 }
2786 }
0f13864e 2787 strlcpy(lp->msn, cfg->eaz, sizeof(lp->msn));
1da177e4
LT		 2788 lp->pre_device = drvidx;
2789 lp->pre_channel = chidx;
2790 lp->onhtime = cfg->onhtime;
2791 lp->charge = cfg->charge;
2792 lp->l2_proto = cfg->l2_proto;
2793 lp->l3_proto = cfg->l3_proto;
2794 lp->cbdelay = cfg->cbdelay;
2795 lp->dialmax = cfg->dialmax;
2796 lp->triggercps = cfg->triggercps;
2797 lp->slavedelay = cfg->slavedelay * HZ;
2798 lp->pppbind = cfg->pppbind;
2799 lp->dialtimeout = cfg->dialtimeout >= 0 ? cfg->dialtimeout * HZ : -1;
2800 lp->dialwait = cfg->dialwait * HZ;
2801 if (cfg->secure)
2802 lp->flags |= ISDN_NET_SECURE;
2803 else
2804 lp->flags &= ~ISDN_NET_SECURE;
2805 if (cfg->cbhup)
2806 lp->flags |= ISDN_NET_CBHUP;
2807 else
2808 lp->flags &= ~ISDN_NET_CBHUP;
2809 switch (cfg->callback) {
2810 case 0:
2811 lp->flags &= ~(ISDN_NET_CALLBACK | ISDN_NET_CBOUT);
2812 break;
2813 case 1:
2814 lp->flags |= ISDN_NET_CALLBACK;
2815 lp->flags &= ~ISDN_NET_CBOUT;
2816 break;
2817 case 2:
2818 lp->flags |= ISDN_NET_CBOUT;
2819 lp->flags &= ~ISDN_NET_CALLBACK;
2820 break;
2821 }
2822 lp->flags &= ~ISDN_NET_DIALMODE_MASK; /* first all bits off */
2823 if (cfg->dialmode && !(cfg->dialmode & ISDN_NET_DIALMODE_MASK)) {
2824 /* old isdnctrl version, where only 0 or 1 is given */
2825 printk(KERN_WARNING
2826 "Old isdnctrl version detected! Please update.\n");
2827 lp->flags |= ISDN_NET_DM_OFF; /* turn on `off' bit */
2828 }
2829 else {
2830 lp->flags |= cfg->dialmode; /* turn on selected bits */
2831 }
2832 if (cfg->chargehup)
2833 lp->hupflags |= ISDN_CHARGEHUP;
2834 else
2835 lp->hupflags &= ~ISDN_CHARGEHUP;
2836 if (cfg->ihup)
2837 lp->hupflags |= ISDN_INHUP;
2838 else
2839 lp->hupflags &= ~ISDN_INHUP;
2840 if (cfg->chargeint > 10) {
2841 lp->hupflags |= ISDN_CHARGEHUP | ISDN_HAVECHARGE | ISDN_MANCHARGE;
2842 lp->chargeint = cfg->chargeint * HZ;
2843 }
2844 if (cfg->p_encap != lp->p_encap) {
2845 if (cfg->p_encap == ISDN_NET_ENCAP_RAWIP) {
d62a38d1
KK		 2846 p->dev->header_ops = NULL;
2847 p->dev->flags = IFF_NOARP|IFF_POINTOPOINT;
1da177e4 2848 } else {
d62a38d1 2849 p->dev->header_ops = &isdn_header_ops;
3b04ddde 2850 if (cfg->p_encap == ISDN_NET_ENCAP_ETHER)
d62a38d1 2851 p->dev->flags = IFF_BROADCAST | IFF_MULTICAST;
3b04ddde 2852 else
d62a38d1 2853 p->dev->flags = IFF_NOARP|IFF_POINTOPOINT;
1da177e4
LT		 2854 }
2855 }
2856 lp->p_encap = cfg->p_encap;
2857 return 0;
2858 }
2859 return -ENODEV;
2860}
2861
2862/*
2863 * Perform get-interface-parameters.ioctl
2864 */
2865int
2866isdn_net_getcfg(isdn_net_ioctl_cfg * cfg)
2867{
2868 isdn_net_dev *p = isdn_net_findif(cfg->name);
2869
2870 if (p) {
2871 isdn_net_local *lp = p->local;
2872
2873 strcpy(cfg->eaz, lp->msn);
2874 cfg->exclusive = lp->exclusive;
2875 if (lp->pre_device >= 0) {
2876 sprintf(cfg->drvid, "%s,%d", dev->drvid[lp->pre_device],
2877 lp->pre_channel);
2878 } else
2879 cfg->drvid[0] = '\0';
2880 cfg->onhtime = lp->onhtime;
2881 cfg->charge = lp->charge;
2882 cfg->l2_proto = lp->l2_proto;
2883 cfg->l3_proto = lp->l3_proto;
2884 cfg->p_encap = lp->p_encap;
2885 cfg->secure = (lp->flags & ISDN_NET_SECURE) ? 1 : 0;
2886 cfg->callback = 0;
2887 if (lp->flags & ISDN_NET_CALLBACK)
2888 cfg->callback = 1;
2889 if (lp->flags & ISDN_NET_CBOUT)
2890 cfg->callback = 2;
2891 cfg->cbhup = (lp->flags & ISDN_NET_CBHUP) ? 1 : 0;
2892 cfg->dialmode = lp->flags & ISDN_NET_DIALMODE_MASK;
2893 cfg->chargehup = (lp->hupflags & 4) ? 1 : 0;
2894 cfg->ihup = (lp->hupflags & 8) ? 1 : 0;
2895 cfg->cbdelay = lp->cbdelay;
2896 cfg->dialmax = lp->dialmax;
2897 cfg->triggercps = lp->triggercps;
2898 cfg->slavedelay = lp->slavedelay / HZ;
2899 cfg->chargeint = (lp->hupflags & ISDN_CHARGEHUP) ?
2900 (lp->chargeint / HZ) : 0;
2901 cfg->pppbind = lp->pppbind;
2902 cfg->dialtimeout = lp->dialtimeout >= 0 ? lp->dialtimeout / HZ : -1;
2903 cfg->dialwait = lp->dialwait / HZ;
faca94ff
KK		 2904 if (lp->slave) {
2905 if (strlen(lp->slave->name) > 8)
2906 strcpy(cfg->slave, "too-long");
2907 else
2908 strcpy(cfg->slave, lp->slave->name);
2909 } else
1da177e4 2910 cfg->slave[0] = '\0';
faca94ff
KK		 2911 if (lp->master) {
2912 if (strlen(lp->master->name) > 8)
2913 strcpy(cfg->master, "too-long");
2914 strcpy(cfg->master, lp->master->name);
2915 } else
1da177e4
LT		 2916 cfg->master[0] = '\0';
2917 return 0;
2918 }
2919 return -ENODEV;
2920}
2921
2922/*
2923 * Add a phone-number to an interface.
2924 */
2925int
2926isdn_net_addphone(isdn_net_ioctl_phone * phone)
2927{
2928 isdn_net_dev *p = isdn_net_findif(phone->name);
2929 isdn_net_phone *n;
2930
2931 if (p) {
5cbded58 2932 if (!(n = kmalloc(sizeof(isdn_net_phone), GFP_KERNEL)))
1da177e4 2933 return -ENOMEM;
0f13864e 2934 strlcpy(n->num, phone->phone, sizeof(n->num));
1da177e4
LT		 2935 n->next = p->local->phone[phone->outgoing & 1];
2936 p->local->phone[phone->outgoing & 1] = n;
2937 return 0;
2938 }
2939 return -ENODEV;
2940}
2941
2942/*
2943 * Copy a string of all phone-numbers of an interface to user space.
2944 * This might sleep and must be called with the isdn semaphore down.
2945 */
2946int
2947isdn_net_getphones(isdn_net_ioctl_phone * phone, char __user *phones)
2948{
2949 isdn_net_dev *p = isdn_net_findif(phone->name);
2950 int inout = phone->outgoing & 1;
2951 int more = 0;
2952 int count = 0;
2953 isdn_net_phone *n;
2954
2955 if (!p)
2956 return -ENODEV;
2957 inout &= 1;
2958 for (n = p->local->phone[inout]; n; n = n->next) {
2959 if (more) {
2960 put_user(' ', phones++);
2961 count++;
2962 }
2963 if (copy_to_user(phones, n->num, strlen(n->num) + 1)) {
2964 return -EFAULT;
2965 }
2966 phones += strlen(n->num);
2967 count += strlen(n->num);
2968 more = 1;
2969 }
2970 put_user(0, phones);
2971 count++;
2972 return count;
2973}
2974
2975/*
2976 * Copy a string containing the peer's phone number of a connected interface
2977 * to user space.
2978 */
2979int
2980isdn_net_getpeer(isdn_net_ioctl_phone *phone, isdn_net_ioctl_phone __user *peer)
2981{
2982 isdn_net_dev *p = isdn_net_findif(phone->name);
2983 int ch, dv, idx;
2984
faca94ff
KK		 2985 if (!p)
2986 return -ENODEV;
1da177e4
LT		 2987 /*
2988 * Theoretical race: while this executes, the remote number might
2989 * become invalid (hang up) or change (new connection), resulting
2990 * in (partially) wrong number copied to user. This race
2991 * currently ignored.
2992 */
2993 ch = p->local->isdn_channel;
2994 dv = p->local->isdn_device;
faca94ff
KK		 2995 if(ch < 0 && dv < 0)
2996 return -ENOTCONN;
1da177e4 2997 idx = isdn_dc2minor(dv, ch);
faca94ff
KK		 2998 if (idx <0 )
2999 return -ENODEV;
1da177e4 3000 /* for pre-bound channels, we need this extra check */
faca94ff
KK		 3001 if (strncmp(dev->num[idx], "???", 3) == 0)
3002 return -ENOTCONN;
3003 strncpy(phone->phone, dev->num[idx], ISDN_MSNLEN);
3004 phone->outgoing = USG_OUTGOING(dev->usage[idx]);
3005 if (copy_to_user(peer, phone, sizeof(*peer)))
3006 return -EFAULT;
1da177e4
LT		 3007 return 0;
3008}
3009/*
3010 * Delete a phone-number from an interface.
3011 */
3012int
3013isdn_net_delphone(isdn_net_ioctl_phone * phone)
3014{
3015 isdn_net_dev *p = isdn_net_findif(phone->name);
3016 int inout = phone->outgoing & 1;
3017 isdn_net_phone *n;
3018 isdn_net_phone *m;
3019
3020 if (p) {
3021 n = p->local->phone[inout];
3022 m = NULL;
3023 while (n) {
3024 if (!strcmp(n->num, phone->phone)) {
3025 if (p->local->dial == n)
3026 p->local->dial = n->next;
3027 if (m)
3028 m->next = n->next;
3029 else
3030 p->local->phone[inout] = n->next;
3031 kfree(n);
3032 return 0;
3033 }
3034 m = n;
3035 n = (isdn_net_phone *) n->next;
3036 }
3037 return -EINVAL;
3038 }
3039 return -ENODEV;
3040}
3041
3042/*
3043 * Delete all phone-numbers of an interface.
3044 */
3045static int
3046isdn_net_rmallphone(isdn_net_dev * p)
3047{
3048 isdn_net_phone *n;
3049 isdn_net_phone *m;
3050 int i;
3051
3052 for (i = 0; i < 2; i++) {
3053 n = p->local->phone[i];
3054 while (n) {
3055 m = n->next;
3056 kfree(n);
3057 n = m;
3058 }
3059 p->local->phone[i] = NULL;
3060 }
3061 p->local->dial = NULL;
3062 return 0;
3063}
3064
3065/*
3066 * Force a hangup of a network-interface.
3067 */
3068int
3069isdn_net_force_hangup(char *name)
3070{
3071 isdn_net_dev *p = isdn_net_findif(name);
3072 struct net_device *q;
3073
3074 if (p) {
3075 if (p->local->isdn_device < 0)
3076 return 1;
3077 q = p->local->slave;
3078 /* If this interface has slaves, do a hangup for them also. */
3079 while (q) {
3080 isdn_net_hangup(q);
3081 q = (((isdn_net_local *) q->priv)->slave);
3082 }
d62a38d1 3083 isdn_net_hangup(p->dev);
1da177e4
LT		 3084 return 0;
3085 }
3086 return -ENODEV;
3087}
3088
3089/*
3090 * Helper-function for isdn_net_rm: Do the real work.
3091 */
3092static int
3093isdn_net_realrm(isdn_net_dev * p, isdn_net_dev * q)
3094{
3095 u_long flags;
3096
3097 if (isdn_net_device_started(p)) {
3098 return -EBUSY;
3099 }
3100#ifdef CONFIG_ISDN_X25
3101 if( p -> cprot && p -> cprot -> pops )
3102 p -> cprot -> pops -> proto_del ( p -> cprot );
3103#endif
3104 /* Free all phone-entries */
3105 isdn_net_rmallphone(p);
3106 /* If interface is bound exclusive, free channel-usage */
3107 if (p->local->exclusive != -1)
3108 isdn_unexclusive_channel(p->local->pre_device, p->local->pre_channel);
3109 if (p->local->master) {
3110 /* It's a slave-device, so update master's slave-pointer if necessary */
d62a38d1 3111 if (((isdn_net_local *) (p->local->master->priv))->slave == p->dev)
1da177e4
LT		 3112 ((isdn_net_local *) (p->local->master->priv))->slave = p->local->slave;
3113 } else {
3114 /* Unregister only if it's a master-device */
d62a38d1 3115 unregister_netdev(p->dev);
1da177e4
LT		 3116 }
3117 /* Unlink device from chain */
3118 spin_lock_irqsave(&dev->lock, flags);
3119 if (q)
3120 q->next = p->next;
3121 else
3122 dev->netdev = p->next;
3123 if (p->local->slave) {
3124 /* If this interface has a slave, remove it also */
faca94ff 3125 char *slavename = p->local->slave->name;
1da177e4
LT		 3126 isdn_net_dev *n = dev->netdev;
3127 q = NULL;
3128 while (n) {
faca94ff 3129 if (!strcmp(n->dev->name, slavename)) {
1da177e4
LT		 3130 spin_unlock_irqrestore(&dev->lock, flags);
3131 isdn_net_realrm(n, q);
3132 spin_lock_irqsave(&dev->lock, flags);
3133 break;
3134 }
3135 q = n;
faca94ff 3136 n = (isdn_net_dev *)n->next;
1da177e4
LT		 3137 }
3138 }
3139 spin_unlock_irqrestore(&dev->lock, flags);
3140 /* If no more net-devices remain, disable auto-hangup timer */
3141 if (dev->netdev == NULL)
3142 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
d62a38d1 3143 free_netdev(p->dev);
1da177e4
LT		 3144 kfree(p);
3145
3146 return 0;
3147}
3148
3149/*
3150 * Remove a single network-interface.
3151 */
3152int
3153isdn_net_rm(char *name)
3154{
3155 u_long flags;
3156 isdn_net_dev *p;
3157 isdn_net_dev *q;
3158
3159 /* Search name in netdev-chain */
3160 spin_lock_irqsave(&dev->lock, flags);
3161 p = dev->netdev;
3162 q = NULL;
3163 while (p) {
faca94ff 3164 if (!strcmp(p->dev->name, name)) {
1da177e4
LT		 3165 spin_unlock_irqrestore(&dev->lock, flags);
3166 return (isdn_net_realrm(p, q));
3167 }
3168 q = p;
3169 p = (isdn_net_dev *) p->next;
3170 }
3171 spin_unlock_irqrestore(&dev->lock, flags);
3172 /* If no more net-devices remain, disable auto-hangup timer */
3173 if (dev->netdev == NULL)
3174 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3175 return -ENODEV;
3176}
3177
3178/*
3179 * Remove all network-interfaces
3180 */
3181int
3182isdn_net_rmall(void)
3183{
3184 u_long flags;
3185 int ret;
3186
3187 /* Walk through netdev-chain */
3188 spin_lock_irqsave(&dev->lock, flags);
3189 while (dev->netdev) {
3190 if (!dev->netdev->local->master) {
3191 /* Remove master-devices only, slaves get removed with their master */
3192 spin_unlock_irqrestore(&dev->lock, flags);
3193 if ((ret = isdn_net_realrm(dev->netdev, NULL))) {
3194 return ret;
3195 }
3196 spin_lock_irqsave(&dev->lock, flags);
3197 }
3198 }
3199 dev->netdev = NULL;
3200 spin_unlock_irqrestore(&dev->lock, flags);
3201 return 0;
3202}
Linux kernel - Deliverables
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