[SK_BUFF]: Introduce skb_network_header()
[linux-2.6.git] / drivers / isdn / i4l / isdn_net.c
1 /* $Id: isdn_net.c,v 1.1.2.2 2004/01/12 22:37:19 keil Exp $
2  *
3  * Linux ISDN subsystem, network interfaces and related functions (linklevel).
4  *
5  * Copyright 1994-1998  by Fritz Elfert (fritz@isdn4linux.de)
6  * Copyright 1995,96    by Thinking Objects Software GmbH Wuerzburg
7  * Copyright 1995,96    by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
8  *
9  * This software may be used and distributed according to the terms
10  * of the GNU General Public License, incorporated herein by reference.
11  *
12  * Data Over Voice (DOV) support added - Guy Ellis 23-Mar-02 
13  *                                       guy@traverse.com.au
14  * Outgoing calls - looks for a 'V' in first char of dialed number
15  * Incoming calls - checks first character of eaz as follows:
16  *   Numeric - accept DATA only - original functionality
17  *   'V'     - accept VOICE (DOV) only
18  *   'B'     - accept BOTH DATA and DOV types
19  *
20  * Jan 2001: fix CISCO HDLC      Bjoern A. Zeeb <i4l@zabbadoz.net>
21  *           for info on the protocol, see 
22  *           http://i4l.zabbadoz.net/i4l/cisco-hdlc.txt
23  */
24
25 #include <linux/isdn.h>
26 #include <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  */
72 static __inline__ int isdn_net_device_started(isdn_net_dev *n)
73 {
74         isdn_net_local *lp = n->local;
75         struct net_device *dev;
76         
77         if (lp->master) 
78                 dev = lp->master;
79         else
80                 dev = &n->dev;
81         return netif_running(dev);
82 }
83
84 /*
85  * wake up the network -> net_device queue.
86  * For slaves, wake the corresponding master interface.
87  */
88 static __inline__ void isdn_net_device_wake_queue(isdn_net_local *lp)
89 {
90         if (lp->master) 
91                 netif_wake_queue(lp->master);
92         else
93                 netif_wake_queue(&lp->netdev->dev);
94 }
95
96 /*
97  * stop the network -> net_device queue.
98  * For slaves, stop the corresponding master interface.
99  */
100 static __inline__ void isdn_net_device_stop_queue(isdn_net_local *lp)
101 {
102         if (lp->master)
103                 netif_stop_queue(lp->master);
104         else
105                 netif_stop_queue(&lp->netdev->dev);
106 }
107
108 /*
109  * find out if the net_device which this lp belongs to (lp can be
110  * master or slave) is busy. It's busy iff all (master and slave) 
111  * queues are busy
112  */
113 static __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
140 static __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
147 static __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
160 static __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
178 static int isdn_net_force_dial_lp(isdn_net_local *);
179 static int isdn_net_start_xmit(struct sk_buff *, struct net_device *);
180
181 static void isdn_net_ciscohdlck_connected(isdn_net_local *lp);
182 static void isdn_net_ciscohdlck_disconnected(isdn_net_local *lp);
183
184 char *isdn_net_revision = "$Revision: 1.1.2.2 $";
185
186  /*
187   * Code for raw-networking over ISDN
188   */
189
190 static void
191 isdn_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
211 static void
212 isdn_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. */
227 static int
228 isdn_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  */
267 static void
268 isdn_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  */
280 static void
281 isdn_net_unbind_channel(isdn_net_local * lp)
282 {
283         skb_queue_purge(&lp->super_tx_queue);
284
285         if (!lp->master) {      /* reset only master device */
286                 /* Moral equivalent of dev_purge_queues():
287                    BEWARE! This chunk of code cannot be called from hardware
288                    interrupt handler. I hope it is true. --ANK
289                  */
290                 qdisc_reset(lp->netdev->dev.qdisc);
291         }
292         lp->dialstate = 0;
293         dev->rx_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
294         dev->st_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
295         isdn_free_channel(lp->isdn_device, lp->isdn_channel, ISDN_USAGE_NET);
296         lp->flags &= ~ISDN_NET_CONNECTED;
297         lp->isdn_device = -1;
298         lp->isdn_channel = -1;
299 }
300
301 /*
302  * Perform auto-hangup and cps-calculation for net-interfaces.
303  *
304  * auto-hangup:
305  * Increment idle-counter (this counter is reset on any incoming or
306  * outgoing packet), if counter exceeds configured limit either do a
307  * hangup immediately or - if configured - wait until just before the next
308  * charge-info.
309  *
310  * cps-calculation (needed for dynamic channel-bundling):
311  * Since this function is called every second, simply reset the
312  * byte-counter of the interface after copying it to the cps-variable.
313  */
314 static unsigned long last_jiffies = -HZ;
315
316 void
317 isdn_net_autohup(void)
318 {
319         isdn_net_dev *p = dev->netdev;
320         int anymore;
321
322         anymore = 0;
323         while (p) {
324                 isdn_net_local *l = p->local;
325                 if (jiffies == last_jiffies)
326                         l->cps = l->transcount;
327                 else
328                         l->cps = (l->transcount * HZ) / (jiffies - last_jiffies);
329                 l->transcount = 0;
330                 if (dev->net_verbose > 3)
331                         printk(KERN_DEBUG "%s: %d bogocps\n", l->name, l->cps);
332                 if ((l->flags & ISDN_NET_CONNECTED) && (!l->dialstate)) {
333                         anymore = 1;
334                         l->huptimer++;
335                         /*
336                          * if there is some dialmode where timeout-hangup
337                          * should _not_ be done, check for that here
338                          */
339                         if ((l->onhtime) &&
340                             (l->huptimer > l->onhtime))
341                         {
342                                 if (l->hupflags & ISDN_MANCHARGE &&
343                                     l->hupflags & ISDN_CHARGEHUP) {
344                                         while (time_after(jiffies, l->chargetime + l->chargeint))
345                                                 l->chargetime += l->chargeint;
346                                         if (time_after(jiffies, l->chargetime + l->chargeint - 2 * HZ))
347                                                 if (l->outgoing || l->hupflags & ISDN_INHUP)
348                                                         isdn_net_hangup(&p->dev);
349                                 } else if (l->outgoing) {
350                                         if (l->hupflags & ISDN_CHARGEHUP) {
351                                                 if (l->hupflags & ISDN_WAITCHARGE) {
352                                                         printk(KERN_DEBUG "isdn_net: Hupflags of %s are %X\n",
353                                                                l->name, l->hupflags);
354                                                         isdn_net_hangup(&p->dev);
355                                                 } else if (time_after(jiffies, l->chargetime + l->chargeint)) {
356                                                         printk(KERN_DEBUG
357                                                                "isdn_net: %s: chtime = %lu, chint = %d\n",
358                                                                l->name, l->chargetime, l->chargeint);
359                                                         isdn_net_hangup(&p->dev);
360                                                 }
361                                         } else
362                                                 isdn_net_hangup(&p->dev);
363                                 } else if (l->hupflags & ISDN_INHUP)
364                                         isdn_net_hangup(&p->dev);
365                         }
366
367                         if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*l) == ISDN_NET_DM_OFF)) {
368                                 isdn_net_hangup(&p->dev);
369                                 break;
370                         }
371                 }
372                 p = (isdn_net_dev *) p->next;
373         }
374         last_jiffies = jiffies;
375         isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, anymore);
376 }
377
378 static 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  */
389 int
390 isdn_net_stat_callback(int idx, isdn_ctrl *c)
391 {
392         isdn_net_dev *p = dev->st_netdev[idx];
393         int cmd = c->command;
394
395         if (p) {
396                 isdn_net_local *lp = p->local;
397 #ifdef CONFIG_ISDN_X25
398                 struct concap_proto *cprot = lp->netdev->cprot;
399                 struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
400 #endif
401                 switch (cmd) {
402                         case ISDN_STAT_BSENT:
403                                 /* A packet has successfully been sent out */
404                                 if ((lp->flags & ISDN_NET_CONNECTED) &&
405                                     (!lp->dialstate)) {
406                                         isdn_net_dec_frame_cnt(lp);
407                                         lp->stats.tx_packets++;
408                                         lp->stats.tx_bytes += c->parm.length;
409                                 }
410                                 return 1;
411                         case ISDN_STAT_DCONN:
412                                 /* D-Channel is up */
413                                 switch (lp->dialstate) {
414                                         case 4:
415                                         case 7:
416                                         case 8:
417                                                 lp->dialstate++;
418                                                 return 1;
419                                         case 12:
420                                                 lp->dialstate = 5;
421                                                 return 1;
422                                 }
423                                 break;
424                         case ISDN_STAT_DHUP:
425                                 /* Either D-Channel-hangup or error during dialout */
426 #ifdef CONFIG_ISDN_X25
427                                 /* If we are not connencted then dialing had
428                                    failed. If there are generic encap protocol
429                                    receiver routines signal the closure of
430                                    the link*/
431
432                                 if( !(lp->flags & ISDN_NET_CONNECTED)
433                                     && pops && pops -> disconn_ind )
434                                         pops -> disconn_ind(cprot);
435 #endif /* CONFIG_ISDN_X25 */
436                                 if ((!lp->dialstate) && (lp->flags & ISDN_NET_CONNECTED)) {
437                                         if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
438                                                 isdn_net_ciscohdlck_disconnected(lp);
439 #ifdef CONFIG_ISDN_PPP
440                                         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
441                                                 isdn_ppp_free(lp);
442 #endif
443                                         isdn_net_lp_disconnected(lp);
444                                         isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
445                                         printk(KERN_INFO "%s: remote hangup\n", lp->name);
446                                         printk(KERN_INFO "%s: Chargesum is %d\n", lp->name,
447                                                lp->charge);
448                                         isdn_net_unbind_channel(lp);
449                                         return 1;
450                                 }
451                                 break;
452 #ifdef CONFIG_ISDN_X25
453                         case ISDN_STAT_BHUP:
454                                 /* B-Channel-hangup */
455                                 /* try if there are generic encap protocol
456                                    receiver routines and signal the closure of
457                                    the link */
458                                 if( pops  &&  pops -> disconn_ind ){
459                                                 pops -> disconn_ind(cprot);
460                                                 return 1;
461                                         }
462                                 break;
463 #endif /* CONFIG_ISDN_X25 */
464                         case ISDN_STAT_BCONN:
465                                 /* B-Channel is up */
466                                 isdn_net_zero_frame_cnt(lp);
467                                 switch (lp->dialstate) {
468                                         case 5:
469                                         case 6:
470                                         case 7:
471                                         case 8:
472                                         case 9:
473                                         case 10:
474                                         case 12:
475                                                 if (lp->dialstate <= 6) {
476                                                         dev->usage[idx] |= ISDN_USAGE_OUTGOING;
477                                                         isdn_info_update();
478                                                 } else
479                                                         dev->rx_netdev[idx] = p;
480                                                 lp->dialstate = 0;
481                                                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 1);
482                                                 if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
483                                                         isdn_net_ciscohdlck_connected(lp);
484                                                 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP) {
485                                                         if (lp->master) { /* is lp a slave? */
486                                                                 isdn_net_dev *nd = ((isdn_net_local *)lp->master->priv)->netdev;
487                                                                 isdn_net_add_to_bundle(nd, lp);
488                                                         }
489                                                 }
490                                                 printk(KERN_INFO "isdn_net: %s connected\n", lp->name);
491                                                 /* If first Chargeinfo comes before B-Channel connect,
492                                                  * we correct the timestamp here.
493                                                  */
494                                                 lp->chargetime = jiffies;
495
496                                                 /* reset dial-timeout */
497                                                 lp->dialstarted = 0;
498                                                 lp->dialwait_timer = 0;
499
500 #ifdef CONFIG_ISDN_PPP
501                                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
502                                                         isdn_ppp_wakeup_daemon(lp);
503 #endif
504 #ifdef CONFIG_ISDN_X25
505                                                 /* try if there are generic concap receiver routines */
506                                                 if( pops )
507                                                         if( pops->connect_ind)
508                                                                 pops->connect_ind(cprot);
509 #endif /* CONFIG_ISDN_X25 */
510                                                 /* ppp needs to do negotiations first */
511                                                 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP)
512                                                         isdn_net_device_wake_queue(lp);
513                                                 return 1;
514                                 }
515                                 break;
516                         case ISDN_STAT_NODCH:
517                                 /* No D-Channel avail. */
518                                 if (lp->dialstate == 4) {
519                                         lp->dialstate--;
520                                         return 1;
521                                 }
522                                 break;
523                         case ISDN_STAT_CINF:
524                                 /* Charge-info from TelCo. Calculate interval between
525                                  * charge-infos and set timestamp for last info for
526                                  * usage by isdn_net_autohup()
527                                  */
528                                 lp->charge++;
529                                 if (lp->hupflags & ISDN_HAVECHARGE) {
530                                         lp->hupflags &= ~ISDN_WAITCHARGE;
531                                         lp->chargeint = jiffies - lp->chargetime - (2 * HZ);
532                                 }
533                                 if (lp->hupflags & ISDN_WAITCHARGE)
534                                         lp->hupflags |= ISDN_HAVECHARGE;
535                                 lp->chargetime = jiffies;
536                                 printk(KERN_DEBUG "isdn_net: Got CINF chargetime of %s now %lu\n",
537                                        lp->name, lp->chargetime);
538                                 return 1;
539                 }
540         }
541         return 0;
542 }
543
544 /*
545  * Perform dialout for net-interfaces and timeout-handling for
546  * D-Channel-up and B-Channel-up Messages.
547  * This function is initially called from within isdn_net_start_xmit() or
548  * or isdn_net_find_icall() after initializing the dialstate for an
549  * interface. If further calls are needed, the function schedules itself
550  * for a timer-callback via isdn_timer_function().
551  * The dialstate is also affected by incoming status-messages from
552  * the ISDN-Channel which are handled in isdn_net_stat_callback() above.
553  */
554 void
555 isdn_net_dial(void)
556 {
557         isdn_net_dev *p = dev->netdev;
558         int anymore = 0;
559         int i;
560         isdn_ctrl cmd;
561         u_char *phone_number;
562
563         while (p) {
564                 isdn_net_local *lp = p->local;
565
566 #ifdef ISDN_DEBUG_NET_DIAL
567                 if (lp->dialstate)
568                         printk(KERN_DEBUG "%s: dialstate=%d\n", lp->name, lp->dialstate);
569 #endif
570                 switch (lp->dialstate) {
571                         case 0:
572                                 /* Nothing to do for this interface */
573                                 break;
574                         case 1:
575                                 /* Initiate dialout. Set phone-number-pointer to first number
576                                  * of interface.
577                                  */
578                                 lp->dial = lp->phone[1];
579                                 if (!lp->dial) {
580                                         printk(KERN_WARNING "%s: phone number deleted?\n",
581                                                lp->name);
582                                         isdn_net_hangup(&p->dev);
583                                         break;
584                                 }
585                                 anymore = 1;
586
587                                 if(lp->dialtimeout > 0)
588                                         if(lp->dialstarted == 0 || time_after(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait)) {
589                                                 lp->dialstarted = jiffies;
590                                                 lp->dialwait_timer = 0;
591                                         }
592
593                                 lp->dialstate++;
594                                 /* Fall through */
595                         case 2:
596                                 /* Prepare dialing. Clear EAZ, then set EAZ. */
597                                 cmd.driver = lp->isdn_device;
598                                 cmd.arg = lp->isdn_channel;
599                                 cmd.command = ISDN_CMD_CLREAZ;
600                                 isdn_command(&cmd);
601                                 sprintf(cmd.parm.num, "%s", isdn_map_eaz2msn(lp->msn, cmd.driver));
602                                 cmd.command = ISDN_CMD_SETEAZ;
603                                 isdn_command(&cmd);
604                                 lp->dialretry = 0;
605                                 anymore = 1;
606                                 lp->dialstate++;
607                                 /* Fall through */
608                         case 3:
609                                 /* Setup interface, dial current phone-number, switch to next number.
610                                  * If list of phone-numbers is exhausted, increment
611                                  * retry-counter.
612                                  */
613                                 if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF)) {
614                                         char *s;
615                                         if (dev->global_flags & ISDN_GLOBAL_STOPPED)
616                                                 s = "dial suppressed: isdn system stopped";
617                                         else
618                                                 s = "dial suppressed: dialmode `off'";
619                                         isdn_net_unreachable(&p->dev, NULL, s);
620                                         isdn_net_hangup(&p->dev);
621                                         break;
622                                 }
623                                 cmd.driver = lp->isdn_device;
624                                 cmd.command = ISDN_CMD_SETL2;
625                                 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
626                                 isdn_command(&cmd);
627                                 cmd.driver = lp->isdn_device;
628                                 cmd.command = ISDN_CMD_SETL3;
629                                 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
630                                 isdn_command(&cmd);
631                                 cmd.driver = lp->isdn_device;
632                                 cmd.arg = lp->isdn_channel;
633                                 if (!lp->dial) {
634                                         printk(KERN_WARNING "%s: phone number deleted?\n",
635                                                lp->name);
636                                         isdn_net_hangup(&p->dev);
637                                         break;
638                                 }
639                                 if (!strncmp(lp->dial->num, "LEASED", strlen("LEASED"))) {
640                                         lp->dialstate = 4;
641                                         printk(KERN_INFO "%s: Open leased line ...\n", lp->name);
642                                 } else {
643                                         if(lp->dialtimeout > 0)
644                                                 if (time_after(jiffies, lp->dialstarted + lp->dialtimeout)) {
645                                                         lp->dialwait_timer = jiffies + lp->dialwait;
646                                                         lp->dialstarted = 0;
647                                                         isdn_net_unreachable(&p->dev, NULL, "dial: timed out");
648                                                         isdn_net_hangup(&p->dev);
649                                                         break;
650                                                 }
651
652                                         cmd.driver = lp->isdn_device;
653                                         cmd.command = ISDN_CMD_DIAL;
654                                         cmd.parm.setup.si2 = 0;
655
656                                         /* check for DOV */
657                                         phone_number = lp->dial->num;
658                                         if ((*phone_number == 'v') ||
659                                             (*phone_number == 'V')) { /* DOV call */
660                                                 cmd.parm.setup.si1 = 1;
661                                         } else { /* DATA call */
662                                                 cmd.parm.setup.si1 = 7;
663                                         }
664
665                                         strcpy(cmd.parm.setup.phone, phone_number);
666                                         /*
667                                          * Switch to next number or back to start if at end of list.
668                                          */
669                                         if (!(lp->dial = (isdn_net_phone *) lp->dial->next)) {
670                                                 lp->dial = lp->phone[1];
671                                                 lp->dialretry++;
672
673                                                 if (lp->dialretry > lp->dialmax) {
674                                                         if (lp->dialtimeout == 0) {
675                                                                 lp->dialwait_timer = jiffies + lp->dialwait;
676                                                                 lp->dialstarted = 0;
677                                                                 isdn_net_unreachable(&p->dev, NULL, "dial: tried all numbers dialmax times");
678                                                         }
679                                                         isdn_net_hangup(&p->dev);
680                                                         break;
681                                                 }
682                                         }
683                                         sprintf(cmd.parm.setup.eazmsn, "%s",
684                                                 isdn_map_eaz2msn(lp->msn, cmd.driver));
685                                         i = isdn_dc2minor(lp->isdn_device, lp->isdn_channel);
686                                         if (i >= 0) {
687                                                 strcpy(dev->num[i], cmd.parm.setup.phone);
688                                                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
689                                                 isdn_info_update();
690                                         }
691                                         printk(KERN_INFO "%s: dialing %d %s... %s\n", lp->name,
692                                                lp->dialretry, cmd.parm.setup.phone,
693                                                (cmd.parm.setup.si1 == 1) ? "DOV" : "");
694                                         lp->dtimer = 0;
695 #ifdef ISDN_DEBUG_NET_DIAL
696                                         printk(KERN_DEBUG "dial: d=%d c=%d\n", lp->isdn_device,
697                                                lp->isdn_channel);
698 #endif
699                                         isdn_command(&cmd);
700                                 }
701                                 lp->huptimer = 0;
702                                 lp->outgoing = 1;
703                                 if (lp->chargeint) {
704                                         lp->hupflags |= ISDN_HAVECHARGE;
705                                         lp->hupflags &= ~ISDN_WAITCHARGE;
706                                 } else {
707                                         lp->hupflags |= ISDN_WAITCHARGE;
708                                         lp->hupflags &= ~ISDN_HAVECHARGE;
709                                 }
710                                 anymore = 1;
711                                 lp->dialstate =
712                                     (lp->cbdelay &&
713                                      (lp->flags & ISDN_NET_CBOUT)) ? 12 : 4;
714                                 break;
715                         case 4:
716                                 /* Wait for D-Channel-connect.
717                                  * If timeout, switch back to state 3.
718                                  * Dialmax-handling moved to state 3.
719                                  */
720                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
721                                         lp->dialstate = 3;
722                                 anymore = 1;
723                                 break;
724                         case 5:
725                                 /* Got D-Channel-Connect, send B-Channel-request */
726                                 cmd.driver = lp->isdn_device;
727                                 cmd.arg = lp->isdn_channel;
728                                 cmd.command = ISDN_CMD_ACCEPTB;
729                                 anymore = 1;
730                                 lp->dtimer = 0;
731                                 lp->dialstate++;
732                                 isdn_command(&cmd);
733                                 break;
734                         case 6:
735                                 /* Wait for B- or D-Channel-connect. If timeout,
736                                  * switch back to state 3.
737                                  */
738 #ifdef ISDN_DEBUG_NET_DIAL
739                                 printk(KERN_DEBUG "dialtimer2: %d\n", lp->dtimer);
740 #endif
741                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
742                                         lp->dialstate = 3;
743                                 anymore = 1;
744                                 break;
745                         case 7:
746                                 /* Got incoming Call, setup L2 and L3 protocols,
747                                  * then wait for D-Channel-connect
748                                  */
749 #ifdef ISDN_DEBUG_NET_DIAL
750                                 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
751 #endif
752                                 cmd.driver = lp->isdn_device;
753                                 cmd.command = ISDN_CMD_SETL2;
754                                 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
755                                 isdn_command(&cmd);
756                                 cmd.driver = lp->isdn_device;
757                                 cmd.command = ISDN_CMD_SETL3;
758                                 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
759                                 isdn_command(&cmd);
760                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT15)
761                                         isdn_net_hangup(&p->dev);
762                                 else {
763                                         anymore = 1;
764                                         lp->dialstate++;
765                                 }
766                                 break;
767                         case 9:
768                                 /* Got incoming D-Channel-Connect, send B-Channel-request */
769                                 cmd.driver = lp->isdn_device;
770                                 cmd.arg = lp->isdn_channel;
771                                 cmd.command = ISDN_CMD_ACCEPTB;
772                                 isdn_command(&cmd);
773                                 anymore = 1;
774                                 lp->dtimer = 0;
775                                 lp->dialstate++;
776                                 break;
777                         case 8:
778                         case 10:
779                                 /*  Wait for B- or D-channel-connect */
780 #ifdef ISDN_DEBUG_NET_DIAL
781                                 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
782 #endif
783                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
784                                         isdn_net_hangup(&p->dev);
785                                 else
786                                         anymore = 1;
787                                 break;
788                         case 11:
789                                 /* Callback Delay */
790                                 if (lp->dtimer++ > lp->cbdelay)
791                                         lp->dialstate = 1;
792                                 anymore = 1;
793                                 break;
794                         case 12:
795                                 /* Remote does callback. Hangup after cbdelay, then wait for incoming
796                                  * call (in state 4).
797                                  */
798                                 if (lp->dtimer++ > lp->cbdelay)
799                                 {
800                                         printk(KERN_INFO "%s: hangup waiting for callback ...\n", lp->name);
801                                         lp->dtimer = 0;
802                                         lp->dialstate = 4;
803                                         cmd.driver = lp->isdn_device;
804                                         cmd.command = ISDN_CMD_HANGUP;
805                                         cmd.arg = lp->isdn_channel;
806                                         isdn_command(&cmd);
807                                         isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
808                                 }
809                                 anymore = 1;
810                                 break;
811                         default:
812                                 printk(KERN_WARNING "isdn_net: Illegal dialstate %d for device %s\n",
813                                        lp->dialstate, lp->name);
814                 }
815                 p = (isdn_net_dev *) p->next;
816         }
817         isdn_timer_ctrl(ISDN_TIMER_NETDIAL, anymore);
818 }
819
820 /*
821  * Perform hangup for a net-interface.
822  */
823 void
824 isdn_net_hangup(struct net_device *d)
825 {
826         isdn_net_local *lp = (isdn_net_local *) d->priv;
827         isdn_ctrl cmd;
828 #ifdef CONFIG_ISDN_X25
829         struct concap_proto *cprot = lp->netdev->cprot;
830         struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
831 #endif
832
833         if (lp->flags & ISDN_NET_CONNECTED) {
834                 if (lp->slave != NULL) {
835                         isdn_net_local *slp = (isdn_net_local *)lp->slave->priv;
836                         if (slp->flags & ISDN_NET_CONNECTED) {
837                                 printk(KERN_INFO
838                                         "isdn_net: hang up slave %s before %s\n",
839                                         slp->name, lp->name);
840                                 isdn_net_hangup(lp->slave);
841                         }
842                 }
843                 printk(KERN_INFO "isdn_net: local hangup %s\n", lp->name);
844 #ifdef CONFIG_ISDN_PPP
845                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
846                         isdn_ppp_free(lp);
847 #endif
848                 isdn_net_lp_disconnected(lp);
849 #ifdef CONFIG_ISDN_X25
850                 /* try if there are generic encap protocol
851                    receiver routines and signal the closure of
852                    the link */
853                 if( pops && pops -> disconn_ind )
854                   pops -> disconn_ind(cprot);
855 #endif /* CONFIG_ISDN_X25 */
856
857                 cmd.driver = lp->isdn_device;
858                 cmd.command = ISDN_CMD_HANGUP;
859                 cmd.arg = lp->isdn_channel;
860                 isdn_command(&cmd);
861                 printk(KERN_INFO "%s: Chargesum is %d\n", lp->name, lp->charge);
862                 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
863         }
864         isdn_net_unbind_channel(lp);
865 }
866
867 typedef struct {
868         unsigned short source;
869         unsigned short dest;
870 } ip_ports;
871
872 static void
873 isdn_net_log_skb(struct sk_buff * skb, isdn_net_local * lp)
874 {
875         /* hopefully, this was set correctly */
876         const u_char *p = skb_network_header(skb);
877         unsigned short proto = ntohs(skb->protocol);
878         int data_ofs;
879         ip_ports *ipp;
880         char addinfo[100];
881
882         addinfo[0] = '\0';
883         /* This check stolen from 2.1.72 dev_queue_xmit_nit() */
884         if (p < skb->data || p >= skb->tail) {
885                 /* fall back to old isdn_net_log_packet method() */
886                 char * buf = skb->data;
887
888                 printk(KERN_DEBUG "isdn_net: protocol %04x is buggy, dev %s\n", skb->protocol, lp->name);
889                 p = buf;
890                 proto = ETH_P_IP;
891                 switch (lp->p_encap) {
892                         case ISDN_NET_ENCAP_IPTYP:
893                                 proto = ntohs(*(unsigned short *) &buf[0]);
894                                 p = &buf[2];
895                                 break;
896                         case ISDN_NET_ENCAP_ETHER:
897                                 proto = ntohs(*(unsigned short *) &buf[12]);
898                                 p = &buf[14];
899                                 break;
900                         case ISDN_NET_ENCAP_CISCOHDLC:
901                                 proto = ntohs(*(unsigned short *) &buf[2]);
902                                 p = &buf[4];
903                                 break;
904 #ifdef CONFIG_ISDN_PPP
905                         case ISDN_NET_ENCAP_SYNCPPP:
906                                 proto = ntohs(skb->protocol);
907                                 p = &buf[IPPP_MAX_HEADER];
908                                 break;
909 #endif
910                 }
911         }
912         data_ofs = ((p[0] & 15) * 4);
913         switch (proto) {
914                 case ETH_P_IP:
915                         switch (p[9]) {
916                                 case 1:
917                                         strcpy(addinfo, " ICMP");
918                                         break;
919                                 case 2:
920                                         strcpy(addinfo, " IGMP");
921                                         break;
922                                 case 4:
923                                         strcpy(addinfo, " IPIP");
924                                         break;
925                                 case 6:
926                                         ipp = (ip_ports *) (&p[data_ofs]);
927                                         sprintf(addinfo, " TCP, port: %d -> %d", ntohs(ipp->source),
928                                                 ntohs(ipp->dest));
929                                         break;
930                                 case 8:
931                                         strcpy(addinfo, " EGP");
932                                         break;
933                                 case 12:
934                                         strcpy(addinfo, " PUP");
935                                         break;
936                                 case 17:
937                                         ipp = (ip_ports *) (&p[data_ofs]);
938                                         sprintf(addinfo, " UDP, port: %d -> %d", ntohs(ipp->source),
939                                                 ntohs(ipp->dest));
940                                         break;
941                                 case 22:
942                                         strcpy(addinfo, " IDP");
943                                         break;
944                         }
945                         printk(KERN_INFO
946                                 "OPEN: %d.%d.%d.%d -> %d.%d.%d.%d%s\n",
947
948                                p[12], p[13], p[14], p[15],
949                                p[16], p[17], p[18], p[19],
950                                addinfo);
951                         break;
952                 case ETH_P_ARP:
953                         printk(KERN_INFO
954                                 "OPEN: ARP %d.%d.%d.%d -> *.*.*.* ?%d.%d.%d.%d\n",
955                                p[14], p[15], p[16], p[17],
956                                p[24], p[25], p[26], p[27]);
957                         break;
958         }
959 }
960
961 /*
962  * this function is used to send supervisory data, i.e. data which was
963  * not received from the network layer, but e.g. frames from ipppd, CCP
964  * reset frames etc.
965  */
966 void isdn_net_write_super(isdn_net_local *lp, struct sk_buff *skb)
967 {
968         if (in_irq()) {
969                 // we can't grab the lock from irq context, 
970                 // so we just queue the packet
971                 skb_queue_tail(&lp->super_tx_queue, skb);
972                 schedule_work(&lp->tqueue);
973                 return;
974         }
975
976         spin_lock_bh(&lp->xmit_lock);
977         if (!isdn_net_lp_busy(lp)) {
978                 isdn_net_writebuf_skb(lp, skb);
979         } else {
980                 skb_queue_tail(&lp->super_tx_queue, skb);
981         }
982         spin_unlock_bh(&lp->xmit_lock);
983 }
984
985 /*
986  * called from tq_immediate
987  */
988 static void isdn_net_softint(struct work_struct *work)
989 {
990         isdn_net_local *lp = container_of(work, isdn_net_local, tqueue);
991         struct sk_buff *skb;
992
993         spin_lock_bh(&lp->xmit_lock);
994         while (!isdn_net_lp_busy(lp)) {
995                 skb = skb_dequeue(&lp->super_tx_queue);
996                 if (!skb)
997                         break;
998                 isdn_net_writebuf_skb(lp, skb);                                
999         }
1000         spin_unlock_bh(&lp->xmit_lock);
1001 }
1002
1003 /* 
1004  * all frames sent from the (net) LL to a HL driver should go via this function
1005  * it's serialized by the caller holding the lp->xmit_lock spinlock
1006  */
1007 void isdn_net_writebuf_skb(isdn_net_local *lp, struct sk_buff *skb)
1008 {
1009         int ret;
1010         int len = skb->len;     /* save len */
1011
1012         /* before obtaining the lock the caller should have checked that
1013            the lp isn't busy */
1014         if (isdn_net_lp_busy(lp)) {
1015                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1016                 goto error;
1017         }
1018
1019         if (!(lp->flags & ISDN_NET_CONNECTED)) {
1020                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1021                 goto error;
1022         }
1023         ret = isdn_writebuf_skb_stub(lp->isdn_device, lp->isdn_channel, 1, skb);
1024         if (ret != len) {
1025                 /* we should never get here */
1026                 printk(KERN_WARNING "%s: HL driver queue full\n", lp->name);
1027                 goto error;
1028         }
1029         
1030         lp->transcount += len;
1031         isdn_net_inc_frame_cnt(lp);
1032         return;
1033
1034  error:
1035         dev_kfree_skb(skb);
1036         lp->stats.tx_errors++;
1037
1038 }
1039
1040
1041 /*
1042  *  Helper function for isdn_net_start_xmit.
1043  *  When called, the connection is already established.
1044  *  Based on cps-calculation, check if device is overloaded.
1045  *  If so, and if a slave exists, trigger dialing for it.
1046  *  If any slave is online, deliver packets using a simple round robin
1047  *  scheme.
1048  *
1049  *  Return: 0 on success, !0 on failure.
1050  */
1051
1052 static int
1053 isdn_net_xmit(struct net_device *ndev, struct sk_buff *skb)
1054 {
1055         isdn_net_dev *nd;
1056         isdn_net_local *slp;
1057         isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1058         int retv = 0;
1059
1060         if (((isdn_net_local *) (ndev->priv))->master) {
1061                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1062                 dev_kfree_skb(skb);
1063                 return 0;
1064         }
1065
1066         /* For the other encaps the header has already been built */
1067 #ifdef CONFIG_ISDN_PPP
1068         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
1069                 return isdn_ppp_xmit(skb, ndev);
1070         }
1071 #endif
1072         nd = ((isdn_net_local *) ndev->priv)->netdev;
1073         lp = isdn_net_get_locked_lp(nd);
1074         if (!lp) {
1075                 printk(KERN_WARNING "%s: all channels busy - requeuing!\n", ndev->name);
1076                 return 1;
1077         }
1078         /* we have our lp locked from now on */
1079
1080         /* Reset hangup-timeout */
1081         lp->huptimer = 0; // FIXME?
1082         isdn_net_writebuf_skb(lp, skb);
1083         spin_unlock_bh(&lp->xmit_lock);
1084
1085         /* the following stuff is here for backwards compatibility.
1086          * in future, start-up and hangup of slaves (based on current load)
1087          * should move to userspace and get based on an overall cps
1088          * calculation
1089          */
1090         if (lp->cps > lp->triggercps) {
1091                 if (lp->slave) {
1092                         if (!lp->sqfull) {
1093                                 /* First time overload: set timestamp only */
1094                                 lp->sqfull = 1;
1095                                 lp->sqfull_stamp = jiffies;
1096                         } else {
1097                                 /* subsequent overload: if slavedelay exceeded, start dialing */
1098                                 if (time_after(jiffies, lp->sqfull_stamp + lp->slavedelay)) {
1099                                         slp = lp->slave->priv;
1100                                         if (!(slp->flags & ISDN_NET_CONNECTED)) {
1101                                                 isdn_net_force_dial_lp((isdn_net_local *) lp->slave->priv);
1102                                         }
1103                                 }
1104                         }
1105                 }
1106         } else {
1107                 if (lp->sqfull && time_after(jiffies, lp->sqfull_stamp + lp->slavedelay + (10 * HZ))) {
1108                         lp->sqfull = 0;
1109                 }
1110                 /* this is a hack to allow auto-hangup for slaves on moderate loads */
1111                 nd->queue = nd->local;
1112         }
1113
1114         return retv;
1115
1116 }
1117
1118 static void
1119 isdn_net_adjust_hdr(struct sk_buff *skb, struct net_device *dev)
1120 {
1121         isdn_net_local *lp = (isdn_net_local *) dev->priv;
1122         if (!skb)
1123                 return;
1124         if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
1125                 const int pullsize = skb_network_offset(skb) - ETH_HLEN;
1126                 if (pullsize > 0) {
1127                         printk(KERN_DEBUG "isdn_net: Pull junk %d\n", pullsize);
1128                         skb_pull(skb, pullsize);
1129                 }
1130         }
1131 }
1132
1133
1134 static void isdn_net_tx_timeout(struct net_device * ndev)
1135 {
1136         isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1137
1138         printk(KERN_WARNING "isdn_tx_timeout dev %s dialstate %d\n", ndev->name, lp->dialstate);
1139         if (!lp->dialstate){
1140                 lp->stats.tx_errors++;
1141                 /*
1142                  * There is a certain probability that this currently
1143                  * works at all because if we always wake up the interface,
1144                  * then upper layer will try to send the next packet
1145                  * immediately. And then, the old clean_up logic in the
1146                  * driver will hopefully continue to work as it used to do.
1147                  *
1148                  * This is rather primitive right know, we better should
1149                  * clean internal queues here, in particular for multilink and
1150                  * ppp, and reset HL driver's channel, too.   --HE
1151                  *
1152                  * actually, this may not matter at all, because ISDN hardware
1153                  * should not see transmitter hangs at all IMO
1154                  * changed KERN_DEBUG to KERN_WARNING to find out if this is 
1155                  * ever called   --KG
1156                  */
1157         }
1158         ndev->trans_start = jiffies;
1159         netif_wake_queue(ndev);
1160 }
1161
1162 /*
1163  * Try sending a packet.
1164  * If this interface isn't connected to a ISDN-Channel, find a free channel,
1165  * and start dialing.
1166  */
1167 static int
1168 isdn_net_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1169 {
1170         isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1171 #ifdef CONFIG_ISDN_X25
1172         struct concap_proto * cprot = lp -> netdev -> cprot;
1173 /* At this point hard_start_xmit() passes control to the encapsulation
1174    protocol (if present).
1175    For X.25 auto-dialing is completly bypassed because:
1176    - It does not conform with the semantics of a reliable datalink
1177      service as needed by X.25 PLP.
1178    - I don't want that the interface starts dialing when the network layer
1179      sends a message which requests to disconnect the lapb link (or if it
1180      sends any other message not resulting in data transmission).
1181    Instead, dialing will be initiated by the encapsulation protocol entity
1182    when a dl_establish request is received from the upper layer.
1183 */
1184         if (cprot && cprot -> pops) {
1185                 int ret = cprot -> pops -> encap_and_xmit ( cprot , skb);
1186
1187                 if (ret)
1188                         netif_stop_queue(ndev);
1189                 return ret;
1190         } else
1191 #endif
1192         /* auto-dialing xmit function */
1193         {
1194 #ifdef ISDN_DEBUG_NET_DUMP
1195                 u_char *buf;
1196 #endif
1197                 isdn_net_adjust_hdr(skb, ndev);
1198 #ifdef ISDN_DEBUG_NET_DUMP
1199                 buf = skb->data;
1200                 isdn_dumppkt("S:", buf, skb->len, 40);
1201 #endif
1202
1203                 if (!(lp->flags & ISDN_NET_CONNECTED)) {
1204                         int chi;
1205                         /* only do autodial if allowed by config */
1206                         if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) {
1207                                 isdn_net_unreachable(ndev, skb, "dial rejected: interface not in dialmode `auto'");
1208                                 dev_kfree_skb(skb);
1209                                 return 0;
1210                         }
1211                         if (lp->phone[1]) {
1212                                 ulong flags;
1213
1214                                 if(lp->dialwait_timer <= 0)
1215                                         if(lp->dialstarted > 0 && lp->dialtimeout > 0 && time_before(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait))
1216                                                 lp->dialwait_timer = lp->dialstarted + lp->dialtimeout + lp->dialwait;
1217
1218                                 if(lp->dialwait_timer > 0) {
1219                                         if(time_before(jiffies, lp->dialwait_timer)) {
1220                                                 isdn_net_unreachable(ndev, skb, "dial rejected: retry-time not reached");
1221                                                 dev_kfree_skb(skb);
1222                                                 return 0;
1223                                         } else
1224                                                 lp->dialwait_timer = 0;
1225                                 }
1226                                 /* Grab a free ISDN-Channel */
1227                                 spin_lock_irqsave(&dev->lock, flags);
1228                                 if (((chi =
1229                                      isdn_get_free_channel(
1230                                                         ISDN_USAGE_NET,
1231                                                         lp->l2_proto,
1232                                                         lp->l3_proto,
1233                                                         lp->pre_device,
1234                                                         lp->pre_channel,
1235                                                         lp->msn)
1236                                                         ) < 0) &&
1237                                         ((chi =
1238                                      isdn_get_free_channel(
1239                                                         ISDN_USAGE_NET,
1240                                                         lp->l2_proto,
1241                                                         lp->l3_proto,
1242                                                         lp->pre_device,
1243                                                         lp->pre_channel^1,
1244                                                         lp->msn)
1245                                                         ) < 0)) {
1246                                         spin_unlock_irqrestore(&dev->lock, flags);
1247                                         isdn_net_unreachable(ndev, skb,
1248                                                            "No channel");
1249                                         dev_kfree_skb(skb);
1250                                         return 0;
1251                                 }
1252                                 /* Log packet, which triggered dialing */
1253                                 if (dev->net_verbose)
1254                                         isdn_net_log_skb(skb, lp);
1255                                 lp->dialstate = 1;
1256                                 /* Connect interface with channel */
1257                                 isdn_net_bind_channel(lp, chi);
1258 #ifdef CONFIG_ISDN_PPP
1259                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
1260                                         /* no 'first_skb' handling for syncPPP */
1261                                         if (isdn_ppp_bind(lp) < 0) {
1262                                                 dev_kfree_skb(skb);
1263                                                 isdn_net_unbind_channel(lp);
1264                                                 spin_unlock_irqrestore(&dev->lock, flags);
1265                                                 return 0;       /* STN (skb to nirvana) ;) */
1266                                         }
1267 #ifdef CONFIG_IPPP_FILTER
1268                                         if (isdn_ppp_autodial_filter(skb, lp)) {
1269                                                 isdn_ppp_free(lp);
1270                                                 isdn_net_unbind_channel(lp);
1271                                                 spin_unlock_irqrestore(&dev->lock, flags);
1272                                                 isdn_net_unreachable(ndev, skb, "dial rejected: packet filtered");
1273                                                 dev_kfree_skb(skb);
1274                                                 return 0;
1275                                         }
1276 #endif
1277                                         spin_unlock_irqrestore(&dev->lock, flags);
1278                                         isdn_net_dial();        /* Initiate dialing */
1279                                         netif_stop_queue(ndev);
1280                                         return 1;       /* let upper layer requeue skb packet */
1281                                 }
1282 #endif
1283                                 /* Initiate dialing */
1284                                 spin_unlock_irqrestore(&dev->lock, flags);
1285                                 isdn_net_dial();
1286                                 isdn_net_device_stop_queue(lp);
1287                                 return 1;
1288                         } else {
1289                                 isdn_net_unreachable(ndev, skb,
1290                                                      "No phone number");
1291                                 dev_kfree_skb(skb);
1292                                 return 0;
1293                         }
1294                 } else {
1295                         /* Device is connected to an ISDN channel */ 
1296                         ndev->trans_start = jiffies;
1297                         if (!lp->dialstate) {
1298                                 /* ISDN connection is established, try sending */
1299                                 int ret;
1300                                 ret = (isdn_net_xmit(ndev, skb));
1301                                 if(ret) netif_stop_queue(ndev);
1302                                 return ret;
1303                         } else
1304                                 netif_stop_queue(ndev);
1305                 }
1306         }
1307         return 1;
1308 }
1309
1310 /*
1311  * Shutdown a net-interface.
1312  */
1313 static int
1314 isdn_net_close(struct net_device *dev)
1315 {
1316         struct net_device *p;
1317 #ifdef CONFIG_ISDN_X25
1318         struct concap_proto * cprot =
1319                 ( (isdn_net_local *) dev->priv ) -> netdev -> cprot;
1320         /* printk(KERN_DEBUG "isdn_net_close %s\n" , dev-> name ); */
1321 #endif
1322
1323 #ifdef CONFIG_ISDN_X25
1324         if( cprot && cprot -> pops ) cprot -> pops -> close( cprot );
1325 #endif
1326         netif_stop_queue(dev);
1327         if ((p = (((isdn_net_local *) dev->priv)->slave))) {
1328                 /* If this interface has slaves, stop them also */
1329                 while (p) {
1330 #ifdef CONFIG_ISDN_X25
1331                         cprot = ( (isdn_net_local *) p->priv )
1332                                 -> netdev -> cprot;
1333                         if( cprot && cprot -> pops )
1334                                 cprot -> pops -> close( cprot );
1335 #endif
1336                         isdn_net_hangup(p);
1337                         p = (((isdn_net_local *) p->priv)->slave);
1338                 }
1339         }
1340         isdn_net_hangup(dev);
1341         isdn_unlock_drivers();
1342         return 0;
1343 }
1344
1345 /*
1346  * Get statistics
1347  */
1348 static struct net_device_stats *
1349 isdn_net_get_stats(struct net_device *dev)
1350 {
1351         isdn_net_local *lp = (isdn_net_local *) dev->priv;
1352         return &lp->stats;
1353 }
1354
1355 /*      This is simply a copy from std. eth.c EXCEPT we pull ETH_HLEN
1356  *      instead of dev->hard_header_len off. This is done because the
1357  *      lowlevel-driver has already pulled off its stuff when we get
1358  *      here and this routine only gets called with p_encap == ETHER.
1359  *      Determine the packet's protocol ID. The rule here is that we
1360  *      assume 802.3 if the type field is short enough to be a length.
1361  *      This is normal practice and works for any 'now in use' protocol.
1362  */
1363
1364 static unsigned short
1365 isdn_net_type_trans(struct sk_buff *skb, struct net_device *dev)
1366 {
1367         struct ethhdr *eth;
1368         unsigned char *rawp;
1369
1370         skb_reset_mac_header(skb);
1371         skb_pull(skb, ETH_HLEN);
1372         eth = eth_hdr(skb);
1373
1374         if (*eth->h_dest & 1) {
1375                 if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0)
1376                         skb->pkt_type = PACKET_BROADCAST;
1377                 else
1378                         skb->pkt_type = PACKET_MULTICAST;
1379         }
1380         /*
1381          *      This ALLMULTI check should be redundant by 1.4
1382          *      so don't forget to remove it.
1383          */
1384
1385         else if (dev->flags & (IFF_PROMISC /*| IFF_ALLMULTI*/)) {
1386                 if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
1387                         skb->pkt_type = PACKET_OTHERHOST;
1388         }
1389         if (ntohs(eth->h_proto) >= 1536)
1390                 return eth->h_proto;
1391
1392         rawp = skb->data;
1393
1394         /*
1395          *      This is a magic hack to spot IPX packets. Older Novell breaks
1396          *      the protocol design and runs IPX over 802.3 without an 802.2 LLC
1397          *      layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
1398          *      won't work for fault tolerant netware but does for the rest.
1399          */
1400         if (*(unsigned short *) rawp == 0xFFFF)
1401                 return htons(ETH_P_802_3);
1402         /*
1403          *      Real 802.2 LLC
1404          */
1405         return htons(ETH_P_802_2);
1406 }
1407
1408
1409 /* 
1410  * CISCO HDLC keepalive specific stuff
1411  */
1412 static struct sk_buff*
1413 isdn_net_ciscohdlck_alloc_skb(isdn_net_local *lp, int len)
1414 {
1415         unsigned short hl = dev->drv[lp->isdn_device]->interface->hl_hdrlen;
1416         struct sk_buff *skb;
1417
1418         skb = alloc_skb(hl + len, GFP_ATOMIC);
1419         if (skb)
1420                 skb_reserve(skb, hl);
1421         else 
1422                 printk("isdn out of mem at %s:%d!\n", __FILE__, __LINE__);
1423         return skb;
1424 }
1425
1426 /* cisco hdlck device private ioctls */
1427 static int
1428 isdn_ciscohdlck_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1429 {
1430         isdn_net_local *lp = (isdn_net_local *) dev->priv;
1431         unsigned long len = 0;
1432         unsigned long expires = 0;
1433         int tmp = 0;
1434         int period = lp->cisco_keepalive_period;
1435         s8 debserint = lp->cisco_debserint;
1436         int rc = 0;
1437
1438         if (lp->p_encap != ISDN_NET_ENCAP_CISCOHDLCK)
1439                 return -EINVAL;
1440
1441         switch (cmd) {
1442                 /* get/set keepalive period */
1443                 case SIOCGKEEPPERIOD:
1444                         len = (unsigned long)sizeof(lp->cisco_keepalive_period);
1445                         if (copy_to_user(ifr->ifr_data,
1446                                 &lp->cisco_keepalive_period, len))
1447                                 rc = -EFAULT;
1448                         break;
1449                 case SIOCSKEEPPERIOD:
1450                         tmp = lp->cisco_keepalive_period;
1451                         len = (unsigned long)sizeof(lp->cisco_keepalive_period);
1452                         if (copy_from_user(&period, ifr->ifr_data, len))
1453                                 rc = -EFAULT;
1454                         if ((period > 0) && (period <= 32767))
1455                                 lp->cisco_keepalive_period = period;
1456                         else
1457                                 rc = -EINVAL;
1458                         if (!rc && (tmp != lp->cisco_keepalive_period)) {
1459                                 expires = (unsigned long)(jiffies +
1460                                         lp->cisco_keepalive_period * HZ);
1461                                 mod_timer(&lp->cisco_timer, expires);
1462                                 printk(KERN_INFO "%s: Keepalive period set "
1463                                         "to %d seconds.\n",
1464                                         lp->name, lp->cisco_keepalive_period);
1465                         }
1466                         break;
1467
1468                 /* get/set debugging */
1469                 case SIOCGDEBSERINT:
1470                         len = (unsigned long)sizeof(lp->cisco_debserint);
1471                         if (copy_to_user(ifr->ifr_data,
1472                                 &lp->cisco_debserint, len))
1473                                 rc = -EFAULT;
1474                         break;
1475                 case SIOCSDEBSERINT:
1476                         len = (unsigned long)sizeof(lp->cisco_debserint);
1477                         if (copy_from_user(&debserint,
1478                                 ifr->ifr_data, len))
1479                                 rc = -EFAULT;
1480                         if ((debserint >= 0) && (debserint <= 64))
1481                                 lp->cisco_debserint = debserint;
1482                         else
1483                                 rc = -EINVAL;
1484                         break;
1485
1486                 default:
1487                         rc = -EINVAL;
1488                         break;
1489         }
1490         return (rc);
1491 }
1492
1493 /* called via cisco_timer.function */
1494 static void
1495 isdn_net_ciscohdlck_slarp_send_keepalive(unsigned long data)
1496 {
1497         isdn_net_local *lp = (isdn_net_local *) data;
1498         struct sk_buff *skb;
1499         unsigned char *p;
1500         unsigned long last_cisco_myseq = lp->cisco_myseq;
1501         int myseq_diff = 0;
1502
1503         if (!(lp->flags & ISDN_NET_CONNECTED) || lp->dialstate) {
1504                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1505                 return;
1506         }
1507         lp->cisco_myseq++;
1508
1509         myseq_diff = (lp->cisco_myseq - lp->cisco_mineseen);
1510         if ((lp->cisco_line_state) && ((myseq_diff >= 3)||(myseq_diff <= -3))) {
1511                 /* line up -> down */
1512                 lp->cisco_line_state = 0;
1513                 printk (KERN_WARNING
1514                                 "UPDOWN: Line protocol on Interface %s,"
1515                                 " changed state to down\n", lp->name);
1516                 /* should stop routing higher-level data accross */
1517         } else if ((!lp->cisco_line_state) &&
1518                 (myseq_diff >= 0) && (myseq_diff <= 2)) {
1519                 /* line down -> up */
1520                 lp->cisco_line_state = 1;
1521                 printk (KERN_WARNING
1522                                 "UPDOWN: Line protocol on Interface %s,"
1523                                 " changed state to up\n", lp->name);
1524                 /* restart routing higher-level data accross */
1525         }
1526
1527         if (lp->cisco_debserint)
1528                 printk (KERN_DEBUG "%s: HDLC "
1529                         "myseq %lu, mineseen %lu%c, yourseen %lu, %s\n",
1530                         lp->name, last_cisco_myseq, lp->cisco_mineseen,
1531                         ((last_cisco_myseq == lp->cisco_mineseen) ? '*' : 040),
1532                         lp->cisco_yourseq,
1533                         ((lp->cisco_line_state) ? "line up" : "line down"));
1534
1535         skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1536         if (!skb)
1537                 return;
1538
1539         p = skb_put(skb, 4 + 14);
1540
1541         /* cisco header */
1542         p += put_u8 (p, CISCO_ADDR_UNICAST);
1543         p += put_u8 (p, CISCO_CTRL);
1544         p += put_u16(p, CISCO_TYPE_SLARP);
1545
1546         /* slarp keepalive */
1547         p += put_u32(p, CISCO_SLARP_KEEPALIVE);
1548         p += put_u32(p, lp->cisco_myseq);
1549         p += put_u32(p, lp->cisco_yourseq);
1550         p += put_u16(p, 0xffff); // reliablity, always 0xffff
1551
1552         isdn_net_write_super(lp, skb);
1553
1554         lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1555         
1556         add_timer(&lp->cisco_timer);
1557 }
1558
1559 static void
1560 isdn_net_ciscohdlck_slarp_send_request(isdn_net_local *lp)
1561 {
1562         struct sk_buff *skb;
1563         unsigned char *p;
1564
1565         skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1566         if (!skb)
1567                 return;
1568
1569         p = skb_put(skb, 4 + 14);
1570
1571         /* cisco header */
1572         p += put_u8 (p, CISCO_ADDR_UNICAST);
1573         p += put_u8 (p, CISCO_CTRL);
1574         p += put_u16(p, CISCO_TYPE_SLARP);
1575
1576         /* slarp request */
1577         p += put_u32(p, CISCO_SLARP_REQUEST);
1578         p += put_u32(p, 0); // address
1579         p += put_u32(p, 0); // netmask
1580         p += put_u16(p, 0); // unused
1581
1582         isdn_net_write_super(lp, skb);
1583 }
1584
1585 static void 
1586 isdn_net_ciscohdlck_connected(isdn_net_local *lp)
1587 {
1588         lp->cisco_myseq = 0;
1589         lp->cisco_mineseen = 0;
1590         lp->cisco_yourseq = 0;
1591         lp->cisco_keepalive_period = ISDN_TIMER_KEEPINT;
1592         lp->cisco_last_slarp_in = 0;
1593         lp->cisco_line_state = 0;
1594         lp->cisco_debserint = 0;
1595
1596         /* send slarp request because interface/seq.no.s reset */
1597         isdn_net_ciscohdlck_slarp_send_request(lp);
1598
1599         init_timer(&lp->cisco_timer);
1600         lp->cisco_timer.data = (unsigned long) lp;
1601         lp->cisco_timer.function = isdn_net_ciscohdlck_slarp_send_keepalive;
1602         lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1603         add_timer(&lp->cisco_timer);
1604 }
1605
1606 static void 
1607 isdn_net_ciscohdlck_disconnected(isdn_net_local *lp)
1608 {
1609         del_timer(&lp->cisco_timer);
1610 }
1611
1612 static void
1613 isdn_net_ciscohdlck_slarp_send_reply(isdn_net_local *lp)
1614 {
1615         struct sk_buff *skb;
1616         unsigned char *p;
1617         struct in_device *in_dev = NULL;
1618         __be32 addr = 0;                /* local ipv4 address */
1619         __be32 mask = 0;                /* local netmask */
1620
1621         if ((in_dev = lp->netdev->dev.ip_ptr) != NULL) {
1622                 /* take primary(first) address of interface */
1623                 struct in_ifaddr *ifa = in_dev->ifa_list;
1624                 if (ifa != NULL) {
1625                         addr = ifa->ifa_local;
1626                         mask = ifa->ifa_mask;
1627                 }
1628         }
1629
1630         skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1631         if (!skb)
1632                 return;
1633
1634         p = skb_put(skb, 4 + 14);
1635
1636         /* cisco header */
1637         p += put_u8 (p, CISCO_ADDR_UNICAST);
1638         p += put_u8 (p, CISCO_CTRL);
1639         p += put_u16(p, CISCO_TYPE_SLARP);
1640
1641         /* slarp reply, send own ip/netmask; if values are nonsense remote
1642          * should think we are unable to provide it with an address via SLARP */
1643         p += put_u32(p, CISCO_SLARP_REPLY);
1644         p += put_u32(p, addr);  // address
1645         p += put_u32(p, mask);  // netmask
1646         p += put_u16(p, 0);     // unused
1647
1648         isdn_net_write_super(lp, skb);
1649 }
1650
1651 static void
1652 isdn_net_ciscohdlck_slarp_in(isdn_net_local *lp, struct sk_buff *skb)
1653 {
1654         unsigned char *p;
1655         int period;
1656         u32 code;
1657         u32 my_seq, addr;
1658         u32 your_seq, mask;
1659         u32 local;
1660         u16 unused;
1661
1662         if (skb->len < 14)
1663                 return;
1664
1665         p = skb->data;
1666         p += get_u32(p, &code);
1667         
1668         switch (code) {
1669         case CISCO_SLARP_REQUEST:
1670                 lp->cisco_yourseq = 0;
1671                 isdn_net_ciscohdlck_slarp_send_reply(lp);
1672                 break;
1673         case CISCO_SLARP_REPLY:
1674                 addr = ntohl(*(u32 *)p);
1675                 mask = ntohl(*(u32 *)(p+4));
1676                 if (mask != 0xfffffffc)
1677                         goto slarp_reply_out;
1678                 if ((addr & 3) == 0 || (addr & 3) == 3)
1679                         goto slarp_reply_out;
1680                 local = addr ^ 3;
1681                 printk(KERN_INFO "%s: got slarp reply: "
1682                         "remote ip: %d.%d.%d.%d, "
1683                         "local ip: %d.%d.%d.%d "
1684                         "mask: %d.%d.%d.%d\n",
1685                        lp->name,
1686                        HIPQUAD(addr),
1687                        HIPQUAD(local),
1688                        HIPQUAD(mask));
1689                 break;
1690   slarp_reply_out:
1691                  printk(KERN_INFO "%s: got invalid slarp "
1692                                  "reply (%d.%d.%d.%d/%d.%d.%d.%d) "
1693                                  "- ignored\n", lp->name,
1694                                  HIPQUAD(addr), HIPQUAD(mask));
1695                 break;
1696         case CISCO_SLARP_KEEPALIVE:
1697                 period = (int)((jiffies - lp->cisco_last_slarp_in
1698                                 + HZ/2 - 1) / HZ);
1699                 if (lp->cisco_debserint &&
1700                                 (period != lp->cisco_keepalive_period) &&
1701                                 lp->cisco_last_slarp_in) {
1702                         printk(KERN_DEBUG "%s: Keepalive period mismatch - "
1703                                 "is %d but should be %d.\n",
1704                                 lp->name, period, lp->cisco_keepalive_period);
1705                 }
1706                 lp->cisco_last_slarp_in = jiffies;
1707                 p += get_u32(p, &my_seq);
1708                 p += get_u32(p, &your_seq);
1709                 p += get_u16(p, &unused);
1710                 lp->cisco_yourseq = my_seq;
1711                 lp->cisco_mineseen = your_seq;
1712                 break;
1713         }
1714 }
1715
1716 static void
1717 isdn_net_ciscohdlck_receive(isdn_net_local *lp, struct sk_buff *skb)
1718 {
1719         unsigned char *p;
1720         u8 addr;
1721         u8 ctrl;
1722         u16 type;
1723         
1724         if (skb->len < 4)
1725                 goto out_free;
1726
1727         p = skb->data;
1728         p += get_u8 (p, &addr);
1729         p += get_u8 (p, &ctrl);
1730         p += get_u16(p, &type);
1731         skb_pull(skb, 4);
1732         
1733         if (addr != CISCO_ADDR_UNICAST && addr != CISCO_ADDR_BROADCAST) {
1734                 printk(KERN_WARNING "%s: Unknown Cisco addr 0x%02x\n",
1735                        lp->name, addr);
1736                 goto out_free;
1737         }
1738         if (ctrl != CISCO_CTRL) {
1739                 printk(KERN_WARNING "%s: Unknown Cisco ctrl 0x%02x\n",
1740                        lp->name, ctrl);
1741                 goto out_free;
1742         }
1743
1744         switch (type) {
1745         case CISCO_TYPE_SLARP:
1746                 isdn_net_ciscohdlck_slarp_in(lp, skb);
1747                 goto out_free;
1748         case CISCO_TYPE_CDP:
1749                 if (lp->cisco_debserint)
1750                         printk(KERN_DEBUG "%s: Received CDP packet. use "
1751                                 "\"no cdp enable\" on cisco.\n", lp->name);
1752                 goto out_free;
1753         default:
1754                 /* no special cisco protocol */
1755                 skb->protocol = htons(type);
1756                 netif_rx(skb);
1757                 return;
1758         }
1759
1760  out_free:
1761         kfree_skb(skb);
1762 }
1763
1764 /*
1765  * Got a packet from ISDN-Channel.
1766  */
1767 static void
1768 isdn_net_receive(struct net_device *ndev, struct sk_buff *skb)
1769 {
1770         isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1771         isdn_net_local *olp = lp;       /* original 'lp' */
1772 #ifdef CONFIG_ISDN_X25
1773         struct concap_proto *cprot = lp -> netdev -> cprot;
1774 #endif
1775         lp->transcount += skb->len;
1776
1777         lp->stats.rx_packets++;
1778         lp->stats.rx_bytes += skb->len;
1779         if (lp->master) {
1780                 /* Bundling: If device is a slave-device, deliver to master, also
1781                  * handle master's statistics and hangup-timeout
1782                  */
1783                 ndev = lp->master;
1784                 lp = (isdn_net_local *) ndev->priv;
1785                 lp->stats.rx_packets++;
1786                 lp->stats.rx_bytes += skb->len;
1787         }
1788         skb->dev = ndev;
1789         skb->pkt_type = PACKET_HOST;
1790         skb_reset_mac_header(skb);
1791 #ifdef ISDN_DEBUG_NET_DUMP
1792         isdn_dumppkt("R:", skb->data, skb->len, 40);
1793 #endif
1794         switch (lp->p_encap) {
1795                 case ISDN_NET_ENCAP_ETHER:
1796                         /* Ethernet over ISDN */
1797                         olp->huptimer = 0;
1798                         lp->huptimer = 0;
1799                         skb->protocol = isdn_net_type_trans(skb, ndev);
1800                         break;
1801                 case ISDN_NET_ENCAP_UIHDLC:
1802                         /* HDLC with UI-frame (for ispa with -h1 option) */
1803                         olp->huptimer = 0;
1804                         lp->huptimer = 0;
1805                         skb_pull(skb, 2);
1806                         /* Fall through */
1807                 case ISDN_NET_ENCAP_RAWIP:
1808                         /* RAW-IP without MAC-Header */
1809                         olp->huptimer = 0;
1810                         lp->huptimer = 0;
1811                         skb->protocol = htons(ETH_P_IP);
1812                         break;
1813                 case ISDN_NET_ENCAP_CISCOHDLCK:
1814                         isdn_net_ciscohdlck_receive(lp, skb);
1815                         return;
1816                 case ISDN_NET_ENCAP_CISCOHDLC:
1817                         /* CISCO-HDLC IP with type field and  fake I-frame-header */
1818                         skb_pull(skb, 2);
1819                         /* Fall through */
1820                 case ISDN_NET_ENCAP_IPTYP:
1821                         /* IP with type field */
1822                         olp->huptimer = 0;
1823                         lp->huptimer = 0;
1824                         skb->protocol = *(unsigned short *) &(skb->data[0]);
1825                         skb_pull(skb, 2);
1826                         if (*(unsigned short *) skb->data == 0xFFFF)
1827                                 skb->protocol = htons(ETH_P_802_3);
1828                         break;
1829 #ifdef CONFIG_ISDN_PPP
1830                 case ISDN_NET_ENCAP_SYNCPPP:
1831                         /* huptimer is done in isdn_ppp_push_higher */
1832                         isdn_ppp_receive(lp->netdev, olp, skb);
1833                         return;
1834 #endif
1835
1836                 default:
1837 #ifdef CONFIG_ISDN_X25
1838                   /* try if there are generic sync_device receiver routines */
1839                         if(cprot) if(cprot -> pops)
1840                                 if( cprot -> pops -> data_ind){
1841                                         cprot -> pops -> data_ind(cprot,skb);
1842                                         return;
1843                                 };
1844 #endif /* CONFIG_ISDN_X25 */
1845                         printk(KERN_WARNING "%s: unknown encapsulation, dropping\n",
1846                                lp->name);
1847                         kfree_skb(skb);
1848                         return;
1849         }
1850
1851         netif_rx(skb);
1852         return;
1853 }
1854
1855 /*
1856  * A packet arrived via ISDN. Search interface-chain for a corresponding
1857  * interface. If found, deliver packet to receiver-function and return 1,
1858  * else return 0.
1859  */
1860 int
1861 isdn_net_rcv_skb(int idx, struct sk_buff *skb)
1862 {
1863         isdn_net_dev *p = dev->rx_netdev[idx];
1864
1865         if (p) {
1866                 isdn_net_local *lp = p->local;
1867                 if ((lp->flags & ISDN_NET_CONNECTED) &&
1868                     (!lp->dialstate)) {
1869                         isdn_net_receive(&p->dev, skb);
1870                         return 1;
1871                 }
1872         }
1873         return 0;
1874 }
1875
1876 static int
1877 my_eth_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
1878               void *daddr, void *saddr, unsigned len)
1879 {
1880         struct ethhdr *eth = (struct ethhdr *) skb_push(skb, ETH_HLEN);
1881
1882         /*
1883          * Set the protocol type. For a packet of type ETH_P_802_3 we
1884          * put the length here instead. It is up to the 802.2 layer to
1885          * carry protocol information.
1886          */
1887
1888         if (type != ETH_P_802_3)
1889                 eth->h_proto = htons(type);
1890         else
1891                 eth->h_proto = htons(len);
1892
1893         /*
1894          * Set the source hardware address.
1895          */
1896         if (saddr)
1897                 memcpy(eth->h_source, saddr, dev->addr_len);
1898         else
1899                 memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
1900
1901         /*
1902          * Anyway, the loopback-device should never use this function...
1903          */
1904
1905         if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
1906                 memset(eth->h_dest, 0, dev->addr_len);
1907                 return ETH_HLEN /*(dev->hard_header_len)*/;
1908         }
1909         if (daddr) {
1910                 memcpy(eth->h_dest, daddr, dev->addr_len);
1911                 return ETH_HLEN /*dev->hard_header_len*/;
1912         }
1913         return -ETH_HLEN /*dev->hard_header_len*/;
1914 }
1915
1916 /*
1917  *  build an header
1918  *  depends on encaps that is being used.
1919  */
1920
1921 static int
1922 isdn_net_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
1923                 void *daddr, void *saddr, unsigned plen)
1924 {
1925         isdn_net_local *lp = dev->priv;
1926         unsigned char *p;
1927         ushort len = 0;
1928
1929         switch (lp->p_encap) {
1930                 case ISDN_NET_ENCAP_ETHER:
1931                         len = my_eth_header(skb, dev, type, daddr, saddr, plen);
1932                         break;
1933 #ifdef CONFIG_ISDN_PPP
1934                 case ISDN_NET_ENCAP_SYNCPPP:
1935                         /* stick on a fake header to keep fragmentation code happy. */
1936                         len = IPPP_MAX_HEADER;
1937                         skb_push(skb,len);
1938                         break;
1939 #endif
1940                 case ISDN_NET_ENCAP_RAWIP:
1941                         printk(KERN_WARNING "isdn_net_header called with RAW_IP!\n");
1942                         len = 0;
1943                         break;
1944                 case ISDN_NET_ENCAP_IPTYP:
1945                         /* ethernet type field */
1946                         *((ushort *) skb_push(skb, 2)) = htons(type);
1947                         len = 2;
1948                         break;
1949                 case ISDN_NET_ENCAP_UIHDLC:
1950                         /* HDLC with UI-Frames (for ispa with -h1 option) */
1951                         *((ushort *) skb_push(skb, 2)) = htons(0x0103);
1952                         len = 2;
1953                         break;
1954                 case ISDN_NET_ENCAP_CISCOHDLC:
1955                 case ISDN_NET_ENCAP_CISCOHDLCK:
1956                         p = skb_push(skb, 4);
1957                         p += put_u8 (p, CISCO_ADDR_UNICAST);
1958                         p += put_u8 (p, CISCO_CTRL);
1959                         p += put_u16(p, type);
1960                         len = 4;
1961                         break;
1962 #ifdef CONFIG_ISDN_X25
1963                 default:
1964                   /* try if there are generic concap protocol routines */
1965                         if( lp-> netdev -> cprot ){
1966                                 printk(KERN_WARNING "isdn_net_header called with concap_proto!\n");
1967                                 len = 0;
1968                                 break;
1969                         }
1970                         break;
1971 #endif /* CONFIG_ISDN_X25 */
1972         }
1973         return len;
1974 }
1975
1976 /* We don't need to send arp, because we have point-to-point connections. */
1977 static int
1978 isdn_net_rebuild_header(struct sk_buff *skb)
1979 {
1980         struct net_device *dev = skb->dev;
1981         isdn_net_local *lp = dev->priv;
1982         int ret = 0;
1983
1984         if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
1985                 struct ethhdr *eth = (struct ethhdr *) skb->data;
1986
1987                 /*
1988                  *      Only ARP/IP is currently supported
1989                  */
1990
1991                 if (eth->h_proto != htons(ETH_P_IP)) {
1992                         printk(KERN_WARNING
1993                                "isdn_net: %s don't know how to resolve type %d addresses?\n",
1994                                dev->name, (int) eth->h_proto);
1995                         memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
1996                         return 0;
1997                 }
1998                 /*
1999                  *      Try to get ARP to resolve the header.
2000                  */
2001 #ifdef CONFIG_INET
2002                 ret = arp_find(eth->h_dest, skb);
2003 #endif
2004         }
2005         return ret;
2006 }
2007
2008 /*
2009  * Interface-setup. (just after registering a new interface)
2010  */
2011 static int
2012 isdn_net_init(struct net_device *ndev)
2013 {
2014         ushort max_hlhdr_len = 0;
2015         isdn_net_local *lp = (isdn_net_local *) ndev->priv;
2016         int drvidx, i;
2017
2018         ether_setup(ndev);
2019         lp->org_hhc = ndev->hard_header_cache;
2020         lp->org_hcu = ndev->header_cache_update;
2021
2022         /* Setup the generic properties */
2023
2024         ndev->hard_header = NULL;
2025         ndev->hard_header_cache = NULL;
2026         ndev->header_cache_update = NULL;
2027         ndev->mtu = 1500;
2028         ndev->flags = IFF_NOARP|IFF_POINTOPOINT;
2029         ndev->type = ARPHRD_ETHER;
2030         ndev->addr_len = ETH_ALEN;
2031
2032         /* for clients with MPPP maybe higher values better */
2033         ndev->tx_queue_len = 30;
2034
2035         for (i = 0; i < ETH_ALEN; i++)
2036                 ndev->broadcast[i] = 0xff;
2037
2038         /* The ISDN-specific entries in the device structure. */
2039         ndev->open = &isdn_net_open;
2040         ndev->hard_start_xmit = &isdn_net_start_xmit;
2041
2042         /*
2043          *  up till binding we ask the protocol layer to reserve as much
2044          *  as we might need for HL layer
2045          */
2046
2047         for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2048                 if (dev->drv[drvidx])
2049                         if (max_hlhdr_len < dev->drv[drvidx]->interface->hl_hdrlen)
2050                                 max_hlhdr_len = dev->drv[drvidx]->interface->hl_hdrlen;
2051
2052         ndev->hard_header_len = ETH_HLEN + max_hlhdr_len;
2053         ndev->stop = &isdn_net_close;
2054         ndev->get_stats = &isdn_net_get_stats;
2055         ndev->rebuild_header = &isdn_net_rebuild_header;
2056         ndev->do_ioctl = NULL;
2057         return 0;
2058 }
2059
2060 static void
2061 isdn_net_swapbind(int drvidx)
2062 {
2063         isdn_net_dev *p;
2064
2065 #ifdef ISDN_DEBUG_NET_ICALL
2066         printk(KERN_DEBUG "n_fi: swapping ch of %d\n", drvidx);
2067 #endif
2068         p = dev->netdev;
2069         while (p) {
2070                 if (p->local->pre_device == drvidx)
2071                         switch (p->local->pre_channel) {
2072                                 case 0:
2073                                         p->local->pre_channel = 1;
2074                                         break;
2075                                 case 1:
2076                                         p->local->pre_channel = 0;
2077                                         break;
2078                         }
2079                 p = (isdn_net_dev *) p->next;
2080         }
2081 }
2082
2083 static void
2084 isdn_net_swap_usage(int i1, int i2)
2085 {
2086         int u1 = dev->usage[i1] & ISDN_USAGE_EXCLUSIVE;
2087         int u2 = dev->usage[i2] & ISDN_USAGE_EXCLUSIVE;
2088
2089 #ifdef ISDN_DEBUG_NET_ICALL
2090         printk(KERN_DEBUG "n_fi: usage of %d and %d\n", i1, i2);
2091 #endif
2092         dev->usage[i1] &= ~ISDN_USAGE_EXCLUSIVE;
2093         dev->usage[i1] |= u2;
2094         dev->usage[i2] &= ~ISDN_USAGE_EXCLUSIVE;
2095         dev->usage[i2] |= u1;
2096         isdn_info_update();
2097 }
2098
2099 /*
2100  * An incoming call-request has arrived.
2101  * Search the interface-chain for an appropriate interface.
2102  * If found, connect the interface to the ISDN-channel and initiate
2103  * D- and B-Channel-setup. If secure-flag is set, accept only
2104  * configured phone-numbers. If callback-flag is set, initiate
2105  * callback-dialing.
2106  *
2107  * Return-Value: 0 = No appropriate interface for this call.
2108  *               1 = Call accepted
2109  *               2 = Reject call, wait cbdelay, then call back
2110  *               3 = Reject call
2111  *               4 = Wait cbdelay, then call back
2112  *               5 = No appropriate interface for this call,
2113  *                   would eventually match if CID was longer.
2114  */
2115
2116 int
2117 isdn_net_find_icall(int di, int ch, int idx, setup_parm *setup)
2118 {
2119         char *eaz;
2120         int si1;
2121         int si2;
2122         int ematch;
2123         int wret;
2124         int swapped;
2125         int sidx = 0;
2126         u_long flags;
2127         isdn_net_dev *p;
2128         isdn_net_phone *n;
2129         char nr[32];
2130         char *my_eaz;
2131
2132         /* Search name in netdev-chain */
2133         if (!setup->phone[0]) {
2134                 nr[0] = '0';
2135                 nr[1] = '\0';
2136                 printk(KERN_INFO "isdn_net: Incoming call without OAD, assuming '0'\n");
2137         } else
2138                 strcpy(nr, setup->phone);
2139         si1 = (int) setup->si1;
2140         si2 = (int) setup->si2;
2141         if (!setup->eazmsn[0]) {
2142                 printk(KERN_WARNING "isdn_net: Incoming call without CPN, assuming '0'\n");
2143                 eaz = "0";
2144         } else
2145                 eaz = setup->eazmsn;
2146         if (dev->net_verbose > 1)
2147                 printk(KERN_INFO "isdn_net: call from %s,%d,%d -> %s\n", nr, si1, si2, eaz);
2148         /* Accept DATA and VOICE calls at this stage
2149          * local eaz is checked later for allowed call types
2150          */
2151         if ((si1 != 7) && (si1 != 1)) {
2152                 if (dev->net_verbose > 1)
2153                         printk(KERN_INFO "isdn_net: Service-Indicator not 1 or 7, ignored\n");
2154                 return 0;
2155         }
2156         n = (isdn_net_phone *) 0;
2157         p = dev->netdev;
2158         ematch = wret = swapped = 0;
2159 #ifdef ISDN_DEBUG_NET_ICALL
2160         printk(KERN_DEBUG "n_fi: di=%d ch=%d idx=%d usg=%d\n", di, ch, idx,
2161                 dev->usage[idx]);
2162 #endif
2163         while (p) {
2164                 int matchret;
2165                 isdn_net_local *lp = p->local;
2166
2167                 /* If last check has triggered as binding-swap, revert it */
2168                 switch (swapped) {
2169                         case 2:
2170                                 isdn_net_swap_usage(idx, sidx);
2171                                 /* fall through */
2172                         case 1:
2173                                 isdn_net_swapbind(di);
2174                                 break;
2175                 }
2176                 swapped = 0;
2177                 /* check acceptable call types for DOV */
2178                 my_eaz = isdn_map_eaz2msn(lp->msn, di);
2179                 if (si1 == 1) { /* it's a DOV call, check if we allow it */
2180                         if (*my_eaz == 'v' || *my_eaz == 'V' ||
2181                             *my_eaz == 'b' || *my_eaz == 'B')
2182                                 my_eaz++; /* skip to allow a match */
2183                         else
2184                                 my_eaz = NULL; /* force non match */
2185                 } else { /* it's a DATA call, check if we allow it */
2186                         if (*my_eaz == 'b' || *my_eaz == 'B')
2187                                 my_eaz++; /* skip to allow a match */
2188                 }
2189                 if (my_eaz)
2190                         matchret = isdn_msncmp(eaz, my_eaz);
2191                 else
2192                         matchret = 1;
2193                 if (!matchret)
2194                         ematch = 1;
2195
2196                 /* Remember if more numbers eventually can match */
2197                 if (matchret > wret)
2198                         wret = matchret;
2199 #ifdef ISDN_DEBUG_NET_ICALL
2200                 printk(KERN_DEBUG "n_fi: if='%s', l.msn=%s, l.flags=%d, l.dstate=%d\n",
2201                        lp->name, lp->msn, lp->flags, lp->dialstate);
2202 #endif
2203                 if ((!matchret) &&                                        /* EAZ is matching   */
2204                     (((!(lp->flags & ISDN_NET_CONNECTED)) &&              /* but not connected */
2205                       (USG_NONE(dev->usage[idx]))) ||                     /* and ch. unused or */
2206                      ((((lp->dialstate == 4) || (lp->dialstate == 12)) && /* if dialing        */
2207                        (!(lp->flags & ISDN_NET_CALLBACK)))                /* but no callback   */
2208                      )))
2209                          {
2210 #ifdef ISDN_DEBUG_NET_ICALL
2211                         printk(KERN_DEBUG "n_fi: match1, pdev=%d pch=%d\n",
2212                                lp->pre_device, lp->pre_channel);
2213 #endif
2214                         if (dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) {
2215                                 if ((lp->pre_channel != ch) ||
2216                                     (lp->pre_device != di)) {
2217                                         /* Here we got a problem:
2218                                          * If using an ICN-Card, an incoming call is always signaled on
2219                                          * on the first channel of the card, if both channels are
2220                                          * down. However this channel may be bound exclusive. If the
2221                                          * second channel is free, this call should be accepted.
2222                                          * The solution is horribly but it runs, so what:
2223                                          * We exchange the exclusive bindings of the two channels, the
2224                                          * corresponding variables in the interface-structs.
2225                                          */
2226                                         if (ch == 0) {
2227                                                 sidx = isdn_dc2minor(di, 1);
2228 #ifdef ISDN_DEBUG_NET_ICALL
2229                                                 printk(KERN_DEBUG "n_fi: ch is 0\n");
2230 #endif
2231                                                 if (USG_NONE(dev->usage[sidx])) {
2232                                                         /* Second Channel is free, now see if it is bound
2233                                                          * exclusive too. */
2234                                                         if (dev->usage[sidx] & ISDN_USAGE_EXCLUSIVE) {
2235 #ifdef ISDN_DEBUG_NET_ICALL
2236                                                                 printk(KERN_DEBUG "n_fi: 2nd channel is down and bound\n");
2237 #endif
2238                                                                 /* Yes, swap bindings only, if the original
2239                                                                  * binding is bound to channel 1 of this driver */
2240                                                                 if ((lp->pre_device == di) &&
2241                                                                     (lp->pre_channel == 1)) {
2242                                                                         isdn_net_swapbind(di);
2243                                                                         swapped = 1;
2244                                                                 } else {
2245                                                                         /* ... else iterate next device */
2246                                                                         p = (isdn_net_dev *) p->next;
2247                                                                         continue;
2248                                                                 }
2249                                                         } else {
2250 #ifdef ISDN_DEBUG_NET_ICALL
2251                                                                 printk(KERN_DEBUG "n_fi: 2nd channel is down and unbound\n");
2252 #endif
2253                                                                 /* No, swap always and swap excl-usage also */
2254                                                                 isdn_net_swap_usage(idx, sidx);
2255                                                                 isdn_net_swapbind(di);
2256                                                                 swapped = 2;
2257                                                         }
2258                                                         /* Now check for exclusive binding again */
2259 #ifdef ISDN_DEBUG_NET_ICALL
2260                                                         printk(KERN_DEBUG "n_fi: final check\n");
2261 #endif
2262                                                         if ((dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) &&
2263                                                             ((lp->pre_channel != ch) ||
2264                                                              (lp->pre_device != di))) {
2265 #ifdef ISDN_DEBUG_NET_ICALL
2266                                                                 printk(KERN_DEBUG "n_fi: final check failed\n");
2267 #endif
2268                                                                 p = (isdn_net_dev *) p->next;
2269                                                                 continue;
2270                                                         }
2271                                                 }
2272                                         } else {
2273                                                 /* We are already on the second channel, so nothing to do */
2274 #ifdef ISDN_DEBUG_NET_ICALL
2275                                                 printk(KERN_DEBUG "n_fi: already on 2nd channel\n");
2276 #endif
2277                                         }
2278                                 }
2279                         }
2280 #ifdef ISDN_DEBUG_NET_ICALL
2281                         printk(KERN_DEBUG "n_fi: match2\n");
2282 #endif
2283                         n = lp->phone[0];
2284                         if (lp->flags & ISDN_NET_SECURE) {
2285                                 while (n) {
2286                                         if (!isdn_msncmp(nr, n->num))
2287                                                 break;
2288                                         n = (isdn_net_phone *) n->next;
2289                                 }
2290                         }
2291                         if (n || (!(lp->flags & ISDN_NET_SECURE))) {
2292 #ifdef ISDN_DEBUG_NET_ICALL
2293                                 printk(KERN_DEBUG "n_fi: match3\n");
2294 #endif
2295                                 /* matching interface found */
2296
2297                                 /*
2298                                  * Is the state STOPPED?
2299                                  * If so, no dialin is allowed,
2300                                  * so reject actively.
2301                                  * */
2302                                 if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2303                                         printk(KERN_INFO "incoming call, interface %s `stopped' -> rejected\n",
2304                                                lp->name);
2305                                         return 3;
2306                                 }
2307                                 /*
2308                                  * Is the interface up?
2309                                  * If not, reject the call actively.
2310                                  */
2311                                 if (!isdn_net_device_started(p)) {
2312                                         printk(KERN_INFO "%s: incoming call, interface down -> rejected\n",
2313                                                lp->name);
2314                                         return 3;
2315                                 }
2316                                 /* Interface is up, now see if it's a slave. If so, see if
2317                                  * it's master and parent slave is online. If not, reject the call.
2318                                  */
2319                                 if (lp->master) {
2320                                         isdn_net_local *mlp = (isdn_net_local *) lp->master->priv;
2321                                         printk(KERN_DEBUG "ICALLslv: %s\n", lp->name);
2322                                         printk(KERN_DEBUG "master=%s\n", mlp->name);
2323                                         if (mlp->flags & ISDN_NET_CONNECTED) {
2324                                                 printk(KERN_DEBUG "master online\n");
2325                                                 /* Master is online, find parent-slave (master if first slave) */
2326                                                 while (mlp->slave) {
2327                                                         if ((isdn_net_local *) mlp->slave->priv == lp)
2328                                                                 break;
2329                                                         mlp = (isdn_net_local *) mlp->slave->priv;
2330                                                 }
2331                                         } else
2332                                                 printk(KERN_DEBUG "master offline\n");
2333                                         /* Found parent, if it's offline iterate next device */
2334                                         printk(KERN_DEBUG "mlpf: %d\n", mlp->flags & ISDN_NET_CONNECTED);
2335                                         if (!(mlp->flags & ISDN_NET_CONNECTED)) {
2336                                                 p = (isdn_net_dev *) p->next;
2337                                                 continue;
2338                                         }
2339                                 } 
2340                                 if (lp->flags & ISDN_NET_CALLBACK) {
2341                                         int chi;
2342                                         /*
2343                                          * Is the state MANUAL?
2344                                          * If so, no callback can be made,
2345                                          * so reject actively.
2346                                          * */
2347                                         if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2348                                                 printk(KERN_INFO "incoming call for callback, interface %s `off' -> rejected\n",
2349                                                        lp->name);
2350                                                 return 3;
2351                                         }
2352                                         printk(KERN_DEBUG "%s: call from %s -> %s, start callback\n",
2353                                                lp->name, nr, eaz);
2354                                         if (lp->phone[1]) {
2355                                                 /* Grab a free ISDN-Channel */
2356                                                 spin_lock_irqsave(&dev->lock, flags);
2357                                                 if ((chi = 
2358                                                         isdn_get_free_channel(
2359                                                                 ISDN_USAGE_NET,
2360                                                                 lp->l2_proto,
2361                                                                 lp->l3_proto,
2362                                                                 lp->pre_device,
2363                                                                 lp->pre_channel,
2364                                                                 lp->msn)
2365                                                                 ) < 0) {
2366
2367                                                         printk(KERN_WARNING "isdn_net_find_icall: No channel for %s\n", lp->name);
2368                                                         spin_unlock_irqrestore(&dev->lock, flags);
2369                                                         return 0;
2370                                                 }
2371                                                 /* Setup dialstate. */
2372                                                 lp->dtimer = 0;
2373                                                 lp->dialstate = 11;
2374                                                 /* Connect interface with channel */
2375                                                 isdn_net_bind_channel(lp, chi);
2376 #ifdef CONFIG_ISDN_PPP
2377                                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2378                                                         if (isdn_ppp_bind(lp) < 0) {
2379                                                                 spin_unlock_irqrestore(&dev->lock, flags);
2380                                                                 isdn_net_unbind_channel(lp);
2381                                                                 return 0;
2382                                                         }
2383 #endif
2384                                                 spin_unlock_irqrestore(&dev->lock, flags);
2385                                                 /* Initiate dialing by returning 2 or 4 */
2386                                                 return (lp->flags & ISDN_NET_CBHUP) ? 2 : 4;
2387                                         } else
2388                                                 printk(KERN_WARNING "isdn_net: %s: No phone number\n", lp->name);
2389                                         return 0;
2390                                 } else {
2391                                         printk(KERN_DEBUG "%s: call from %s -> %s accepted\n", lp->name, nr,
2392                                                eaz);
2393                                         /* if this interface is dialing, it does it probably on a different
2394                                            device, so free this device */
2395                                         if ((lp->dialstate == 4) || (lp->dialstate == 12)) {
2396 #ifdef CONFIG_ISDN_PPP
2397                                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2398                                                         isdn_ppp_free(lp);
2399 #endif
2400                                                 isdn_net_lp_disconnected(lp);
2401                                                 isdn_free_channel(lp->isdn_device, lp->isdn_channel,
2402                                                          ISDN_USAGE_NET);
2403                                         }
2404                                         spin_lock_irqsave(&dev->lock, flags);
2405                                         dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2406                                         dev->usage[idx] |= ISDN_USAGE_NET;
2407                                         strcpy(dev->num[idx], nr);
2408                                         isdn_info_update();
2409                                         dev->st_netdev[idx] = lp->netdev;
2410                                         lp->isdn_device = di;
2411                                         lp->isdn_channel = ch;
2412                                         lp->ppp_slot = -1;
2413                                         lp->flags |= ISDN_NET_CONNECTED;
2414                                         lp->dialstate = 7;
2415                                         lp->dtimer = 0;
2416                                         lp->outgoing = 0;
2417                                         lp->huptimer = 0;
2418                                         lp->hupflags |= ISDN_WAITCHARGE;
2419                                         lp->hupflags &= ~ISDN_HAVECHARGE;
2420 #ifdef CONFIG_ISDN_PPP
2421                                         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
2422                                                 if (isdn_ppp_bind(lp) < 0) {
2423                                                         isdn_net_unbind_channel(lp);
2424                                                         spin_unlock_irqrestore(&dev->lock, flags);
2425                                                         return 0;
2426                                                 }
2427                                         }
2428 #endif
2429                                         spin_unlock_irqrestore(&dev->lock, flags);
2430                                         return 1;
2431                                 }
2432                         }
2433                 }
2434                 p = (isdn_net_dev *) p->next;
2435         }
2436         /* If none of configured EAZ/MSN matched and not verbose, be silent */
2437         if (!ematch || dev->net_verbose)
2438                 printk(KERN_INFO "isdn_net: call from %s -> %d %s ignored\n", nr, di, eaz);
2439         return (wret == 2)?5:0;
2440 }
2441
2442 /*
2443  * Search list of net-interfaces for an interface with given name.
2444  */
2445 isdn_net_dev *
2446 isdn_net_findif(char *name)
2447 {
2448         isdn_net_dev *p = dev->netdev;
2449
2450         while (p) {
2451                 if (!strcmp(p->local->name, name))
2452                         return p;
2453                 p = (isdn_net_dev *) p->next;
2454         }
2455         return (isdn_net_dev *) NULL;
2456 }
2457
2458 /*
2459  * Force a net-interface to dial out.
2460  * This is called from the userlevel-routine below or
2461  * from isdn_net_start_xmit().
2462  */
2463 static int
2464 isdn_net_force_dial_lp(isdn_net_local * lp)
2465 {
2466         if ((!(lp->flags & ISDN_NET_CONNECTED)) && !lp->dialstate) {
2467                 int chi;
2468                 if (lp->phone[1]) {
2469                         ulong flags;
2470
2471                         /* Grab a free ISDN-Channel */
2472                         spin_lock_irqsave(&dev->lock, flags);
2473                         if ((chi = isdn_get_free_channel(
2474                                         ISDN_USAGE_NET,
2475                                         lp->l2_proto,
2476                                         lp->l3_proto,
2477                                         lp->pre_device,
2478                                         lp->pre_channel,
2479                                         lp->msn)) < 0) {
2480                                 printk(KERN_WARNING "isdn_net_force_dial: No channel for %s\n", lp->name);
2481                                 spin_unlock_irqrestore(&dev->lock, flags);
2482                                 return -EAGAIN;
2483                         }
2484                         lp->dialstate = 1;
2485                         /* Connect interface with channel */
2486                         isdn_net_bind_channel(lp, chi);
2487 #ifdef CONFIG_ISDN_PPP
2488                         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2489                                 if (isdn_ppp_bind(lp) < 0) {
2490                                         isdn_net_unbind_channel(lp);
2491                                         spin_unlock_irqrestore(&dev->lock, flags);
2492                                         return -EAGAIN;
2493                                 }
2494 #endif
2495                         /* Initiate dialing */
2496                         spin_unlock_irqrestore(&dev->lock, flags);
2497                         isdn_net_dial();
2498                         return 0;
2499                 } else
2500                         return -EINVAL;
2501         } else
2502                 return -EBUSY;
2503 }
2504
2505 /*
2506  * This is called from certain upper protocol layers (multilink ppp
2507  * and x25iface encapsulation module) that want to initiate dialing
2508  * themselves.
2509  */
2510 int
2511 isdn_net_dial_req(isdn_net_local * lp)
2512 {
2513         /* is there a better error code? */
2514         if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) return -EBUSY;
2515
2516         return isdn_net_force_dial_lp(lp);
2517 }
2518
2519 /*
2520  * Force a net-interface to dial out.
2521  * This is always called from within userspace (ISDN_IOCTL_NET_DIAL).
2522  */
2523 int
2524 isdn_net_force_dial(char *name)
2525 {
2526         isdn_net_dev *p = isdn_net_findif(name);
2527
2528         if (!p)
2529                 return -ENODEV;
2530         return (isdn_net_force_dial_lp(p->local));
2531 }
2532
2533 /*
2534  * Allocate a new network-interface and initialize its data structures.
2535  */
2536 char *
2537 isdn_net_new(char *name, struct net_device *master)
2538 {
2539         isdn_net_dev *netdev;
2540
2541         /* Avoid creating an existing interface */
2542         if (isdn_net_findif(name)) {
2543                 printk(KERN_WARNING "isdn_net: interface %s already exists\n", name);
2544                 return NULL;
2545         }
2546         if (!(netdev = kzalloc(sizeof(isdn_net_dev), GFP_KERNEL))) {
2547                 printk(KERN_WARNING "isdn_net: Could not allocate net-device\n");
2548                 return NULL;
2549         }
2550         if (!(netdev->local = kzalloc(sizeof(isdn_net_local), GFP_KERNEL))) {
2551                 printk(KERN_WARNING "isdn_net: Could not allocate device locals\n");
2552                 kfree(netdev);
2553                 return NULL;
2554         }
2555         if (name == NULL)
2556                 strcpy(netdev->local->name, "         ");
2557         else
2558                 strcpy(netdev->local->name, name);
2559         strcpy(netdev->dev.name, netdev->local->name);
2560         netdev->dev.priv = netdev->local;
2561         netdev->dev.init = isdn_net_init;
2562         netdev->local->p_encap = ISDN_NET_ENCAP_RAWIP;
2563         if (master) {
2564                 /* Device shall be a slave */
2565                 struct net_device *p = (((isdn_net_local *) master->priv)->slave);
2566                 struct net_device *q = master;
2567
2568                 netdev->local->master = master;
2569                 /* Put device at end of slave-chain */
2570                 while (p) {
2571                         q = p;
2572                         p = (((isdn_net_local *) p->priv)->slave);
2573                 }
2574                 ((isdn_net_local *) q->priv)->slave = &(netdev->dev);
2575         } else {
2576                 /* Device shall be a master */
2577                 /*
2578                  * Watchdog timer (currently) for master only.
2579                  */
2580                 netdev->dev.tx_timeout = isdn_net_tx_timeout;
2581                 netdev->dev.watchdog_timeo = ISDN_NET_TX_TIMEOUT;
2582                 if (register_netdev(&netdev->dev) != 0) {
2583                         printk(KERN_WARNING "isdn_net: Could not register net-device\n");
2584                         kfree(netdev->local);
2585                         kfree(netdev);
2586                         return NULL;
2587                 }
2588         }
2589         netdev->local->magic = ISDN_NET_MAGIC;
2590
2591         netdev->queue = netdev->local;
2592         spin_lock_init(&netdev->queue_lock);
2593
2594         netdev->local->last = netdev->local;
2595         netdev->local->netdev = netdev;
2596         netdev->local->next = netdev->local;
2597
2598         INIT_WORK(&netdev->local->tqueue, isdn_net_softint);
2599         spin_lock_init(&netdev->local->xmit_lock);
2600
2601         netdev->local->isdn_device = -1;
2602         netdev->local->isdn_channel = -1;
2603         netdev->local->pre_device = -1;
2604         netdev->local->pre_channel = -1;
2605         netdev->local->exclusive = -1;
2606         netdev->local->ppp_slot = -1;
2607         netdev->local->pppbind = -1;
2608         skb_queue_head_init(&netdev->local->super_tx_queue);
2609         netdev->local->l2_proto = ISDN_PROTO_L2_X75I;
2610         netdev->local->l3_proto = ISDN_PROTO_L3_TRANS;
2611         netdev->local->triggercps = 6000;
2612         netdev->local->slavedelay = 10 * HZ;
2613         netdev->local->hupflags = ISDN_INHUP;   /* Do hangup even on incoming calls */
2614         netdev->local->onhtime = 10;    /* Default hangup-time for saving costs
2615            of those who forget configuring this */
2616         netdev->local->dialmax = 1;
2617         netdev->local->flags = ISDN_NET_CBHUP | ISDN_NET_DM_MANUAL;     /* Hangup before Callback, manual dial */
2618         netdev->local->cbdelay = 25;    /* Wait 5 secs before Callback */
2619         netdev->local->dialtimeout = -1;  /* Infinite Dial-Timeout */
2620         netdev->local->dialwait = 5 * HZ; /* Wait 5 sec. after failed dial */
2621         netdev->local->dialstarted = 0;   /* Jiffies of last dial-start */
2622         netdev->local->dialwait_timer = 0;  /* Jiffies of earliest next dial-start */
2623
2624         /* Put into to netdev-chain */
2625         netdev->next = (void *) dev->netdev;
2626         dev->netdev = netdev;
2627         return netdev->dev.name;
2628 }
2629
2630 char *
2631 isdn_net_newslave(char *parm)
2632 {
2633         char *p = strchr(parm, ',');
2634         isdn_net_dev *n;
2635         char newname[10];
2636
2637         if (p) {
2638                 /* Slave-Name MUST not be empty */
2639                 if (!strlen(p + 1))
2640                         return NULL;
2641                 strcpy(newname, p + 1);
2642                 *p = 0;
2643                 /* Master must already exist */
2644                 if (!(n = isdn_net_findif(parm)))
2645                         return NULL;
2646                 /* Master must be a real interface, not a slave */
2647                 if (n->local->master)
2648                         return NULL;
2649                 /* Master must not be started yet */
2650                 if (isdn_net_device_started(n)) 
2651                         return NULL;
2652                 return (isdn_net_new(newname, &(n->dev)));
2653         }
2654         return NULL;
2655 }
2656
2657 /*
2658  * Set interface-parameters.
2659  * Always set all parameters, so the user-level application is responsible
2660  * for not overwriting existing setups. It has to get the current
2661  * setup first, if only selected parameters are to be changed.
2662  */
2663 int
2664 isdn_net_setcfg(isdn_net_ioctl_cfg * cfg)
2665 {
2666         isdn_net_dev *p = isdn_net_findif(cfg->name);
2667         ulong features;
2668         int i;
2669         int drvidx;
2670         int chidx;
2671         char drvid[25];
2672
2673         if (p) {
2674                 isdn_net_local *lp = p->local;
2675
2676                 /* See if any registered driver supports the features we want */
2677                 features = ((1 << cfg->l2_proto) << ISDN_FEATURE_L2_SHIFT) |
2678                         ((1 << cfg->l3_proto) << ISDN_FEATURE_L3_SHIFT);
2679                 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2680                         if (dev->drv[i])
2681                                 if ((dev->drv[i]->interface->features & features) == features)
2682                                         break;
2683                 if (i == ISDN_MAX_DRIVERS) {
2684                         printk(KERN_WARNING "isdn_net: No driver with selected features\n");
2685                         return -ENODEV;
2686                 }
2687                 if (lp->p_encap != cfg->p_encap){
2688 #ifdef CONFIG_ISDN_X25
2689                         struct concap_proto * cprot = p -> cprot;
2690 #endif
2691                         if (isdn_net_device_started(p)) {
2692                                 printk(KERN_WARNING "%s: cannot change encap when if is up\n",
2693                                        lp->name);
2694                                 return -EBUSY;
2695                         }
2696 #ifdef CONFIG_ISDN_X25
2697                         if( cprot && cprot -> pops )
2698                                 cprot -> pops -> proto_del ( cprot );
2699                         p -> cprot = NULL;
2700                         lp -> dops = NULL;
2701                         /* ... ,  prepare for configuration of new one ... */
2702                         switch ( cfg -> p_encap ){
2703                         case ISDN_NET_ENCAP_X25IFACE:
2704                                 lp -> dops = &isdn_concap_reliable_dl_dops;
2705                         }
2706                         /* ... and allocate new one ... */
2707                         p -> cprot = isdn_concap_new( cfg -> p_encap );
2708                         /* p -> cprot == NULL now if p_encap is not supported
2709                            by means of the concap_proto mechanism */
2710                         /* the protocol is not configured yet; this will
2711                            happen later when isdn_net_reset() is called */
2712 #endif
2713                 }
2714                 switch ( cfg->p_encap ) {
2715                 case ISDN_NET_ENCAP_SYNCPPP:
2716 #ifndef CONFIG_ISDN_PPP
2717                         printk(KERN_WARNING "%s: SyncPPP support not configured\n",
2718                                lp->name);
2719                         return -EINVAL;
2720 #else
2721                         p->dev.type = ARPHRD_PPP;       /* change ARP type */
2722                         p->dev.addr_len = 0;
2723                         p->dev.do_ioctl = isdn_ppp_dev_ioctl;
2724 #endif
2725                         break;
2726                 case ISDN_NET_ENCAP_X25IFACE:
2727 #ifndef CONFIG_ISDN_X25
2728                         printk(KERN_WARNING "%s: isdn-x25 support not configured\n",
2729                                p->local->name);
2730                         return -EINVAL;
2731 #else
2732                         p->dev.type = ARPHRD_X25;       /* change ARP type */
2733                         p->dev.addr_len = 0;
2734 #endif
2735                         break;
2736                 case ISDN_NET_ENCAP_CISCOHDLCK:
2737                         p->dev.do_ioctl = isdn_ciscohdlck_dev_ioctl;
2738                         break;
2739                 default:
2740                         if( cfg->p_encap >= 0 &&
2741                             cfg->p_encap <= ISDN_NET_ENCAP_MAX_ENCAP )
2742                                 break;
2743                         printk(KERN_WARNING
2744                                "%s: encapsulation protocol %d not supported\n",
2745                                p->local->name, cfg->p_encap);
2746                         return -EINVAL;
2747                 }
2748                 if (strlen(cfg->drvid)) {
2749                         /* A bind has been requested ... */
2750                         char *c,
2751                         *e;
2752
2753                         drvidx = -1;
2754                         chidx = -1;
2755                         strcpy(drvid, cfg->drvid);
2756                         if ((c = strchr(drvid, ','))) {
2757                                 /* The channel-number is appended to the driver-Id with a comma */
2758                                 chidx = (int) simple_strtoul(c + 1, &e, 10);
2759                                 if (e == c)
2760                                         chidx = -1;
2761                                 *c = '\0';
2762                         }
2763                         for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2764                                 /* Lookup driver-Id in array */
2765                                 if (!(strcmp(dev->drvid[i], drvid))) {
2766                                         drvidx = i;
2767                                         break;
2768                                 }
2769                         if ((drvidx == -1) || (chidx == -1))
2770                                 /* Either driver-Id or channel-number invalid */
2771                                 return -ENODEV;
2772                 } else {
2773                         /* Parameters are valid, so get them */
2774                         drvidx = lp->pre_device;
2775                         chidx = lp->pre_channel;
2776                 }
2777                 if (cfg->exclusive > 0) {
2778                         unsigned long flags;
2779
2780                         /* If binding is exclusive, try to grab the channel */
2781                         spin_lock_irqsave(&dev->lock, flags);
2782                         if ((i = isdn_get_free_channel(ISDN_USAGE_NET,
2783                                 lp->l2_proto, lp->l3_proto, drvidx,
2784                                 chidx, lp->msn)) < 0) {
2785                                 /* Grab failed, because desired channel is in use */
2786                                 lp->exclusive = -1;
2787                                 spin_unlock_irqrestore(&dev->lock, flags);
2788                                 return -EBUSY;
2789                         }
2790                         /* All went ok, so update isdninfo */
2791                         dev->usage[i] = ISDN_USAGE_EXCLUSIVE;
2792                         isdn_info_update();
2793                         spin_unlock_irqrestore(&dev->lock, flags);
2794                         lp->exclusive = i;
2795                 } else {
2796                         /* Non-exclusive binding or unbind. */
2797                         lp->exclusive = -1;
2798                         if ((lp->pre_device != -1) && (cfg->exclusive == -1)) {
2799                                 isdn_unexclusive_channel(lp->pre_device, lp->pre_channel);
2800                                 isdn_free_channel(lp->pre_device, lp->pre_channel, ISDN_USAGE_NET);
2801                                 drvidx = -1;
2802                                 chidx = -1;
2803                         }
2804                 }
2805                 strcpy(lp->msn, cfg->eaz);
2806                 lp->pre_device = drvidx;
2807                 lp->pre_channel = chidx;
2808                 lp->onhtime = cfg->onhtime;
2809                 lp->charge = cfg->charge;
2810                 lp->l2_proto = cfg->l2_proto;
2811                 lp->l3_proto = cfg->l3_proto;
2812                 lp->cbdelay = cfg->cbdelay;
2813                 lp->dialmax = cfg->dialmax;
2814                 lp->triggercps = cfg->triggercps;
2815                 lp->slavedelay = cfg->slavedelay * HZ;
2816                 lp->pppbind = cfg->pppbind;
2817                 lp->dialtimeout = cfg->dialtimeout >= 0 ? cfg->dialtimeout * HZ : -1;
2818                 lp->dialwait = cfg->dialwait * HZ;
2819                 if (cfg->secure)
2820                         lp->flags |= ISDN_NET_SECURE;
2821                 else
2822                         lp->flags &= ~ISDN_NET_SECURE;
2823                 if (cfg->cbhup)
2824                         lp->flags |= ISDN_NET_CBHUP;
2825                 else
2826                         lp->flags &= ~ISDN_NET_CBHUP;
2827                 switch (cfg->callback) {
2828                         case 0:
2829                                 lp->flags &= ~(ISDN_NET_CALLBACK | ISDN_NET_CBOUT);
2830                                 break;
2831                         case 1:
2832                                 lp->flags |= ISDN_NET_CALLBACK;
2833                                 lp->flags &= ~ISDN_NET_CBOUT;
2834                                 break;
2835                         case 2:
2836                                 lp->flags |= ISDN_NET_CBOUT;
2837                                 lp->flags &= ~ISDN_NET_CALLBACK;
2838                                 break;
2839                 }
2840                 lp->flags &= ~ISDN_NET_DIALMODE_MASK;   /* first all bits off */
2841                 if (cfg->dialmode && !(cfg->dialmode & ISDN_NET_DIALMODE_MASK)) {
2842                         /* old isdnctrl version, where only 0 or 1 is given */
2843                         printk(KERN_WARNING
2844                              "Old isdnctrl version detected! Please update.\n");
2845                         lp->flags |= ISDN_NET_DM_OFF; /* turn on `off' bit */
2846                 }
2847                 else {
2848                         lp->flags |= cfg->dialmode;  /* turn on selected bits */
2849                 }
2850                 if (cfg->chargehup)
2851                         lp->hupflags |= ISDN_CHARGEHUP;
2852                 else
2853                         lp->hupflags &= ~ISDN_CHARGEHUP;
2854                 if (cfg->ihup)
2855                         lp->hupflags |= ISDN_INHUP;
2856                 else
2857                         lp->hupflags &= ~ISDN_INHUP;
2858                 if (cfg->chargeint > 10) {
2859                         lp->hupflags |= ISDN_CHARGEHUP | ISDN_HAVECHARGE | ISDN_MANCHARGE;
2860                         lp->chargeint = cfg->chargeint * HZ;
2861                 }
2862                 if (cfg->p_encap != lp->p_encap) {
2863                         if (cfg->p_encap == ISDN_NET_ENCAP_RAWIP) {
2864                                 p->dev.hard_header = NULL;
2865                                 p->dev.hard_header_cache = NULL;
2866                                 p->dev.header_cache_update = NULL;
2867                                 p->dev.flags = IFF_NOARP|IFF_POINTOPOINT;
2868                         } else {
2869                                 p->dev.hard_header = isdn_net_header;
2870                                 if (cfg->p_encap == ISDN_NET_ENCAP_ETHER) {
2871                                         p->dev.hard_header_cache = lp->org_hhc;
2872                                         p->dev.header_cache_update = lp->org_hcu;
2873                                         p->dev.flags = IFF_BROADCAST | IFF_MULTICAST;
2874                                 } else {
2875                                         p->dev.hard_header_cache = NULL;
2876                                         p->dev.header_cache_update = NULL;
2877                                         p->dev.flags = IFF_NOARP|IFF_POINTOPOINT;
2878                                 }
2879                         }
2880                 }
2881                 lp->p_encap = cfg->p_encap;
2882                 return 0;
2883         }
2884         return -ENODEV;
2885 }
2886
2887 /*
2888  * Perform get-interface-parameters.ioctl
2889  */
2890 int
2891 isdn_net_getcfg(isdn_net_ioctl_cfg * cfg)
2892 {
2893         isdn_net_dev *p = isdn_net_findif(cfg->name);
2894
2895         if (p) {
2896                 isdn_net_local *lp = p->local;
2897
2898                 strcpy(cfg->eaz, lp->msn);
2899                 cfg->exclusive = lp->exclusive;
2900                 if (lp->pre_device >= 0) {
2901                         sprintf(cfg->drvid, "%s,%d", dev->drvid[lp->pre_device],
2902                                 lp->pre_channel);
2903                 } else
2904                         cfg->drvid[0] = '\0';
2905                 cfg->onhtime = lp->onhtime;
2906                 cfg->charge = lp->charge;
2907                 cfg->l2_proto = lp->l2_proto;
2908                 cfg->l3_proto = lp->l3_proto;
2909                 cfg->p_encap = lp->p_encap;
2910                 cfg->secure = (lp->flags & ISDN_NET_SECURE) ? 1 : 0;
2911                 cfg->callback = 0;
2912                 if (lp->flags & ISDN_NET_CALLBACK)
2913                         cfg->callback = 1;
2914                 if (lp->flags & ISDN_NET_CBOUT)
2915                         cfg->callback = 2;
2916                 cfg->cbhup = (lp->flags & ISDN_NET_CBHUP) ? 1 : 0;
2917                 cfg->dialmode = lp->flags & ISDN_NET_DIALMODE_MASK;
2918                 cfg->chargehup = (lp->hupflags & 4) ? 1 : 0;
2919                 cfg->ihup = (lp->hupflags & 8) ? 1 : 0;
2920                 cfg->cbdelay = lp->cbdelay;
2921                 cfg->dialmax = lp->dialmax;
2922                 cfg->triggercps = lp->triggercps;
2923                 cfg->slavedelay = lp->slavedelay / HZ;
2924                 cfg->chargeint = (lp->hupflags & ISDN_CHARGEHUP) ?
2925                     (lp->chargeint / HZ) : 0;
2926                 cfg->pppbind = lp->pppbind;
2927                 cfg->dialtimeout = lp->dialtimeout >= 0 ? lp->dialtimeout / HZ : -1;
2928                 cfg->dialwait = lp->dialwait / HZ;
2929                 if (lp->slave)
2930                         strcpy(cfg->slave, ((isdn_net_local *) lp->slave->priv)->name);
2931                 else
2932                         cfg->slave[0] = '\0';
2933                 if (lp->master)
2934                         strcpy(cfg->master, ((isdn_net_local *) lp->master->priv)->name);
2935                 else
2936                         cfg->master[0] = '\0';
2937                 return 0;
2938         }
2939         return -ENODEV;
2940 }
2941
2942 /*
2943  * Add a phone-number to an interface.
2944  */
2945 int
2946 isdn_net_addphone(isdn_net_ioctl_phone * phone)
2947 {
2948         isdn_net_dev *p = isdn_net_findif(phone->name);
2949         isdn_net_phone *n;
2950
2951         if (p) {
2952                 if (!(n = kmalloc(sizeof(isdn_net_phone), GFP_KERNEL)))
2953                         return -ENOMEM;
2954                 strcpy(n->num, phone->phone);
2955                 n->next = p->local->phone[phone->outgoing & 1];
2956                 p->local->phone[phone->outgoing & 1] = n;
2957                 return 0;
2958         }
2959         return -ENODEV;
2960 }
2961
2962 /*
2963  * Copy a string of all phone-numbers of an interface to user space.
2964  * This might sleep and must be called with the isdn semaphore down.
2965  */
2966 int
2967 isdn_net_getphones(isdn_net_ioctl_phone * phone, char __user *phones)
2968 {
2969         isdn_net_dev *p = isdn_net_findif(phone->name);
2970         int inout = phone->outgoing & 1;
2971         int more = 0;
2972         int count = 0;
2973         isdn_net_phone *n;
2974
2975         if (!p)
2976                 return -ENODEV;
2977         inout &= 1;
2978         for (n = p->local->phone[inout]; n; n = n->next) {
2979                 if (more) {
2980                         put_user(' ', phones++);
2981                         count++;
2982                 }
2983                 if (copy_to_user(phones, n->num, strlen(n->num) + 1)) {
2984                         return -EFAULT;
2985                 }
2986                 phones += strlen(n->num);
2987                 count += strlen(n->num);
2988                 more = 1;
2989         }
2990         put_user(0, phones);
2991         count++;
2992         return count;
2993 }
2994
2995 /*
2996  * Copy a string containing the peer's phone number of a connected interface
2997  * to user space.
2998  */
2999 int
3000 isdn_net_getpeer(isdn_net_ioctl_phone *phone, isdn_net_ioctl_phone __user *peer)
3001 {
3002         isdn_net_dev *p = isdn_net_findif(phone->name);
3003         int ch, dv, idx;
3004
3005         if (!p) return -ENODEV;
3006         /*
3007          * Theoretical race: while this executes, the remote number might
3008          * become invalid (hang up) or change (new connection), resulting
3009          * in (partially) wrong number copied to user. This race
3010          * currently ignored.
3011          */
3012         ch = p->local->isdn_channel;
3013         dv = p->local->isdn_device;
3014         if(ch<0 && dv<0) return -ENOTCONN;
3015         idx = isdn_dc2minor(dv, ch);
3016         if (idx<0) return -ENODEV;
3017         /* for pre-bound channels, we need this extra check */
3018         if ( strncmp(dev->num[idx],"???",3) == 0 ) return -ENOTCONN;
3019         strncpy(phone->phone,dev->num[idx],ISDN_MSNLEN);
3020         phone->outgoing=USG_OUTGOING(dev->usage[idx]);
3021         if ( copy_to_user(peer,phone,sizeof(*peer)) ) return -EFAULT;
3022         return 0;
3023 }
3024 /*
3025  * Delete a phone-number from an interface.
3026  */
3027 int
3028 isdn_net_delphone(isdn_net_ioctl_phone * phone)
3029 {
3030         isdn_net_dev *p = isdn_net_findif(phone->name);
3031         int inout = phone->outgoing & 1;
3032         isdn_net_phone *n;
3033         isdn_net_phone *m;
3034
3035         if (p) {
3036                 n = p->local->phone[inout];
3037                 m = NULL;
3038                 while (n) {
3039                         if (!strcmp(n->num, phone->phone)) {
3040                                 if (p->local->dial == n)
3041                                         p->local->dial = n->next;
3042                                 if (m)
3043                                         m->next = n->next;
3044                                 else
3045                                         p->local->phone[inout] = n->next;
3046                                 kfree(n);
3047                                 return 0;
3048                         }
3049                         m = n;
3050                         n = (isdn_net_phone *) n->next;
3051                 }
3052                 return -EINVAL;
3053         }
3054         return -ENODEV;
3055 }
3056
3057 /*
3058  * Delete all phone-numbers of an interface.
3059  */
3060 static int
3061 isdn_net_rmallphone(isdn_net_dev * p)
3062 {
3063         isdn_net_phone *n;
3064         isdn_net_phone *m;
3065         int i;
3066
3067         for (i = 0; i < 2; i++) {
3068                 n = p->local->phone[i];
3069                 while (n) {
3070                         m = n->next;
3071                         kfree(n);
3072                         n = m;
3073                 }
3074                 p->local->phone[i] = NULL;
3075         }
3076         p->local->dial = NULL;
3077         return 0;
3078 }
3079
3080 /*
3081  * Force a hangup of a network-interface.
3082  */
3083 int
3084 isdn_net_force_hangup(char *name)
3085 {
3086         isdn_net_dev *p = isdn_net_findif(name);
3087         struct net_device *q;
3088
3089         if (p) {
3090                 if (p->local->isdn_device < 0)
3091                         return 1;
3092                 q = p->local->slave;
3093                 /* If this interface has slaves, do a hangup for them also. */
3094                 while (q) {
3095                         isdn_net_hangup(q);
3096                         q = (((isdn_net_local *) q->priv)->slave);
3097                 }
3098                 isdn_net_hangup(&p->dev);
3099                 return 0;
3100         }
3101         return -ENODEV;
3102 }
3103
3104 /*
3105  * Helper-function for isdn_net_rm: Do the real work.
3106  */
3107 static int
3108 isdn_net_realrm(isdn_net_dev * p, isdn_net_dev * q)
3109 {
3110         u_long flags;
3111
3112         if (isdn_net_device_started(p)) {
3113                 return -EBUSY;
3114         }
3115 #ifdef CONFIG_ISDN_X25
3116         if( p -> cprot && p -> cprot -> pops )
3117                 p -> cprot -> pops -> proto_del ( p -> cprot );
3118 #endif
3119         /* Free all phone-entries */
3120         isdn_net_rmallphone(p);
3121         /* If interface is bound exclusive, free channel-usage */
3122         if (p->local->exclusive != -1)
3123                 isdn_unexclusive_channel(p->local->pre_device, p->local->pre_channel);
3124         if (p->local->master) {
3125                 /* It's a slave-device, so update master's slave-pointer if necessary */
3126                 if (((isdn_net_local *) (p->local->master->priv))->slave == &p->dev)
3127                         ((isdn_net_local *) (p->local->master->priv))->slave = p->local->slave;
3128         } else {
3129                 /* Unregister only if it's a master-device */
3130                 p->dev.hard_header_cache = p->local->org_hhc;
3131                 p->dev.header_cache_update = p->local->org_hcu;
3132                 unregister_netdev(&p->dev);
3133         }
3134         /* Unlink device from chain */
3135         spin_lock_irqsave(&dev->lock, flags);
3136         if (q)
3137                 q->next = p->next;
3138         else
3139                 dev->netdev = p->next;
3140         if (p->local->slave) {
3141                 /* If this interface has a slave, remove it also */
3142                 char *slavename = ((isdn_net_local *) (p->local->slave->priv))->name;
3143                 isdn_net_dev *n = dev->netdev;
3144                 q = NULL;
3145                 while (n) {
3146                         if (!strcmp(n->local->name, slavename)) {
3147                                 spin_unlock_irqrestore(&dev->lock, flags);
3148                                 isdn_net_realrm(n, q);
3149                                 spin_lock_irqsave(&dev->lock, flags);
3150                                 break;
3151                         }
3152                         q = n;
3153                         n = (isdn_net_dev *) n->next;
3154                 }
3155         }
3156         spin_unlock_irqrestore(&dev->lock, flags);
3157         /* If no more net-devices remain, disable auto-hangup timer */
3158         if (dev->netdev == NULL)
3159                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3160         kfree(p->local);
3161         kfree(p);
3162
3163         return 0;
3164 }
3165
3166 /*
3167  * Remove a single network-interface.
3168  */
3169 int
3170 isdn_net_rm(char *name)
3171 {
3172         u_long flags;
3173         isdn_net_dev *p;
3174         isdn_net_dev *q;
3175
3176         /* Search name in netdev-chain */
3177         spin_lock_irqsave(&dev->lock, flags);
3178         p = dev->netdev;
3179         q = NULL;
3180         while (p) {
3181                 if (!strcmp(p->local->name, name)) {
3182                         spin_unlock_irqrestore(&dev->lock, flags);
3183                         return (isdn_net_realrm(p, q));
3184                 }
3185                 q = p;
3186                 p = (isdn_net_dev *) p->next;
3187         }
3188         spin_unlock_irqrestore(&dev->lock, flags);
3189         /* If no more net-devices remain, disable auto-hangup timer */
3190         if (dev->netdev == NULL)
3191                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3192         return -ENODEV;
3193 }
3194
3195 /*
3196  * Remove all network-interfaces
3197  */
3198 int
3199 isdn_net_rmall(void)
3200 {
3201         u_long flags;
3202         int ret;
3203
3204         /* Walk through netdev-chain */
3205         spin_lock_irqsave(&dev->lock, flags);
3206         while (dev->netdev) {
3207                 if (!dev->netdev->local->master) {
3208                         /* Remove master-devices only, slaves get removed with their master */
3209                         spin_unlock_irqrestore(&dev->lock, flags);
3210                         if ((ret = isdn_net_realrm(dev->netdev, NULL))) {
3211                                 return ret;
3212                         }
3213                         spin_lock_irqsave(&dev->lock, flags);
3214                 }
3215         }
3216         dev->netdev = NULL;
3217         spin_unlock_irqrestore(&dev->lock, flags);
3218         return 0;
3219 }