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45#include <linux/stddef.h>
46#include <linux/capability.h>
47#include <linux/errno.h>
48#include <linux/kernel.h>
49#include <linux/module.h>
50#include <linux/slab.h>
51#include <linux/smp_lock.h>
52#include <linux/mm.h>
53#include <linux/string.h>
54
55#include <asm/byteorder.h>
56#include <linux/wanrouter.h>
57
58#include <linux/vmalloc.h>
59#include <asm/uaccess.h>
60#include <linux/init.h>
61
62#define KMEM_SAFETYZONE 8
63
64#define DEV_TO_SLAVE(dev) (*((struct net_device **)netdev_priv(dev)))
65
66
67
68
69
70
71
72
73
74static int wanrouter_device_setup(struct wan_device *wandev,
75 wandev_conf_t __user *u_conf);
76static int wanrouter_device_stat(struct wan_device *wandev,
77 wandev_stat_t __user *u_stat);
78static int wanrouter_device_shutdown(struct wan_device *wandev);
79static int wanrouter_device_new_if(struct wan_device *wandev,
80 wanif_conf_t __user *u_conf);
81static int wanrouter_device_del_if(struct wan_device *wandev,
82 char __user *u_name);
83
84
85
86
87
88static struct wan_device *wanrouter_find_device(char *name);
89static int wanrouter_delete_interface(struct wan_device *wandev, char *name);
90static void lock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags)
91 __acquires(lock);
92static void unlock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags)
93 __releases(lock);
94
95
96
97
98
99
100
101static char wanrouter_fullname[] = "Sangoma WANPIPE Router";
102static char wanrouter_copyright[] = "(c) 1995-2000 Sangoma Technologies Inc.";
103static char wanrouter_modname[] = ROUTER_NAME;
104struct wan_device* wanrouter_router_devlist;
105
106
107
108
109
110#if 0
111static unsigned char wanrouter_oui_ether[] = { 0x00, 0x00, 0x00 };
112static unsigned char wanrouter_oui_802_2[] = { 0x00, 0x80, 0xC2 };
113#endif
114
115static int __init wanrouter_init(void)
116{
117 int err;
118
119 printk(KERN_INFO "%s v%u.%u %s\n",
120 wanrouter_fullname, ROUTER_VERSION, ROUTER_RELEASE,
121 wanrouter_copyright);
122
123 err = wanrouter_proc_init();
124 if (err)
125 printk(KERN_INFO "%s: can't create entry in proc filesystem!\n",
126 wanrouter_modname);
127
128 return err;
129}
130
131static void __exit wanrouter_cleanup (void)
132{
133 wanrouter_proc_cleanup();
134}
135
136
137
138
139
140
141subsys_initcall(wanrouter_init);
142module_exit(wanrouter_cleanup);
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165int register_wan_device(struct wan_device *wandev)
166{
167 int err, namelen;
168
169 if ((wandev == NULL) || (wandev->magic != ROUTER_MAGIC) ||
170 (wandev->name == NULL))
171 return -EINVAL;
172
173 namelen = strlen(wandev->name);
174 if (!namelen || (namelen > WAN_DRVNAME_SZ))
175 return -EINVAL;
176
177 if (wanrouter_find_device(wandev->name))
178 return -EEXIST;
179
180#ifdef WANDEBUG
181 printk(KERN_INFO "%s: registering WAN device %s\n",
182 wanrouter_modname, wandev->name);
183#endif
184
185
186
187
188 err = wanrouter_proc_add(wandev);
189 if (err) {
190 printk(KERN_INFO
191 "%s: can't create /proc/net/router/%s entry!\n",
192 wanrouter_modname, wandev->name);
193 return err;
194 }
195
196
197
198
199
200
201 wandev->ndev = 0;
202 wandev->dev = NULL;
203 wandev->next = wanrouter_router_devlist;
204 wanrouter_router_devlist = wandev;
205 return 0;
206}
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221int unregister_wan_device(char *name)
222{
223 struct wan_device *wandev, *prev;
224
225 if (name == NULL)
226 return -EINVAL;
227
228 for (wandev = wanrouter_router_devlist, prev = NULL;
229 wandev && strcmp(wandev->name, name);
230 prev = wandev, wandev = wandev->next)
231 ;
232 if (wandev == NULL)
233 return -ENODEV;
234
235#ifdef WANDEBUG
236 printk(KERN_INFO "%s: unregistering WAN device %s\n",
237 wanrouter_modname, name);
238#endif
239
240 if (wandev->state != WAN_UNCONFIGURED)
241 wanrouter_device_shutdown(wandev);
242
243 if (prev)
244 prev->next = wandev->next;
245 else
246 wanrouter_router_devlist = wandev->next;
247
248 wanrouter_proc_delete(wandev);
249 return 0;
250}
251
252#if 0
253
254
255
256
257
258
259
260
261
262
263
264
265int wanrouter_encapsulate(struct sk_buff *skb, struct net_device *dev,
266 unsigned short type)
267{
268 int hdr_len = 0;
269
270 switch (type) {
271 case ETH_P_IP:
272 hdr_len += 1;
273 skb_push(skb, 1);
274 skb->data[0] = NLPID_IP;
275 break;
276
277 case ETH_P_IPX:
278 case ETH_P_ARP:
279 hdr_len += 7;
280 skb_push(skb, 7);
281 skb->data[0] = 0;
282 skb->data[1] = NLPID_SNAP;
283 skb_copy_to_linear_data_offset(skb, 2, wanrouter_oui_ether,
284 sizeof(wanrouter_oui_ether));
285 *((unsigned short*)&skb->data[5]) = htons(type);
286 break;
287
288 default:
289 printk(KERN_INFO
290 "%s: unsupported Ethertype 0x%04X on interface %s!\n",
291 wanrouter_modname, type, dev->name);
292 hdr_len = -EINVAL;
293 }
294 return hdr_len;
295}
296
297
298
299
300
301
302
303
304
305
306
307
308
309__be16 wanrouter_type_trans(struct sk_buff *skb, struct net_device *dev)
310{
311 int cnt = skb->data[0] ? 0 : 1;
312 __be16 ethertype;
313
314 switch (skb->data[cnt]) {
315 case NLPID_IP:
316 ethertype = htons(ETH_P_IP);
317 cnt += 1;
318 break;
319
320 case NLPID_SNAP:
321 if (memcmp(&skb->data[cnt + 1], wanrouter_oui_ether,
322 sizeof(wanrouter_oui_ether))){
323 printk(KERN_INFO
324 "%s: unsupported SNAP OUI %02X-%02X-%02X "
325 "on interface %s!\n", wanrouter_modname,
326 skb->data[cnt+1], skb->data[cnt+2],
327 skb->data[cnt+3], dev->name);
328 return 0;
329 }
330 ethertype = *((__be16*)&skb->data[cnt+4]);
331 cnt += 6;
332 break;
333
334
335
336 default:
337 printk(KERN_INFO
338 "%s: unsupported NLPID 0x%02X on interface %s!\n",
339 wanrouter_modname, skb->data[cnt], dev->name);
340 return 0;
341 }
342 skb->protocol = ethertype;
343 skb->pkt_type = PACKET_HOST;
344 skb_pull(skb, cnt);
345 skb_reset_mac_header(skb);
346 return ethertype;
347}
348
349#endif
350
351
352
353
354
355
356
357long wanrouter_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
358{
359 struct inode *inode = file->f_path.dentry->d_inode;
360 int err = 0;
361 struct proc_dir_entry *dent;
362 struct wan_device *wandev;
363 void __user *data = (void __user *)arg;
364
365 if (!capable(CAP_NET_ADMIN))
366 return -EPERM;
367
368 if ((cmd >> 8) != ROUTER_IOCTL)
369 return -EINVAL;
370
371 dent = PDE(inode);
372 if ((dent == NULL) || (dent->data == NULL))
373 return -EINVAL;
374
375 wandev = dent->data;
376 if (wandev->magic != ROUTER_MAGIC)
377 return -EINVAL;
378
379 lock_kernel();
380 switch (cmd) {
381 case ROUTER_SETUP:
382 err = wanrouter_device_setup(wandev, data);
383 break;
384
385 case ROUTER_DOWN:
386 err = wanrouter_device_shutdown(wandev);
387 break;
388
389 case ROUTER_STAT:
390 err = wanrouter_device_stat(wandev, data);
391 break;
392
393 case ROUTER_IFNEW:
394 err = wanrouter_device_new_if(wandev, data);
395 break;
396
397 case ROUTER_IFDEL:
398 err = wanrouter_device_del_if(wandev, data);
399 break;
400
401 case ROUTER_IFSTAT:
402 break;
403
404 default:
405 if ((cmd >= ROUTER_USER) &&
406 (cmd <= ROUTER_USER_MAX) &&
407 wandev->ioctl)
408 err = wandev->ioctl(wandev, cmd, arg);
409 else err = -EINVAL;
410 }
411 unlock_kernel();
412 return err;
413}
414
415
416
417
418
419
420
421
422
423
424
425
426
427static int wanrouter_device_setup(struct wan_device *wandev,
428 wandev_conf_t __user *u_conf)
429{
430 void *data = NULL;
431 wandev_conf_t *conf;
432 int err = -EINVAL;
433
434 if (wandev->setup == NULL) {
435 printk(KERN_INFO "%s: ERROR, No setup script: wandev->setup()\n",
436 wandev->name);
437 return 0;
438 }
439
440 conf = kmalloc(sizeof(wandev_conf_t), GFP_KERNEL);
441 if (conf == NULL){
442 printk(KERN_INFO "%s: ERROR, Failed to allocate kernel memory !\n",
443 wandev->name);
444 return -ENOBUFS;
445 }
446
447 if (copy_from_user(conf, u_conf, sizeof(wandev_conf_t))) {
448 printk(KERN_INFO "%s: Failed to copy user config data to kernel space!\n",
449 wandev->name);
450 kfree(conf);
451 return -EFAULT;
452 }
453
454 if (conf->magic != ROUTER_MAGIC) {
455 kfree(conf);
456 printk(KERN_INFO "%s: ERROR, Invalid MAGIC Number\n",
457 wandev->name);
458 return -EINVAL;
459 }
460
461 if (conf->data_size && conf->data) {
462 if (conf->data_size > 128000) {
463 printk(KERN_INFO
464 "%s: ERROR, Invalid firmware data size %i !\n",
465 wandev->name, conf->data_size);
466 kfree(conf);
467 return -EINVAL;
468 }
469
470 data = vmalloc(conf->data_size);
471 if (!data) {
472 printk(KERN_INFO
473 "%s: ERROR, Faild allocate kernel memory !\n",
474 wandev->name);
475 kfree(conf);
476 return -ENOBUFS;
477 }
478 if (!copy_from_user(data, conf->data, conf->data_size)) {
479 conf->data = data;
480 err = wandev->setup(wandev, conf);
481 } else {
482 printk(KERN_INFO
483 "%s: ERROR, Faild to copy from user data !\n",
484 wandev->name);
485 err = -EFAULT;
486 }
487 vfree(data);
488 } else {
489 printk(KERN_INFO
490 "%s: ERROR, No firmware found ! Firmware size = %i !\n",
491 wandev->name, conf->data_size);
492 }
493
494 kfree(conf);
495 return err;
496}
497
498
499
500
501
502
503
504static int wanrouter_device_shutdown(struct wan_device *wandev)
505{
506 struct net_device *dev;
507 int err=0;
508
509 if (wandev->state == WAN_UNCONFIGURED)
510 return 0;
511
512 printk(KERN_INFO "\n%s: Shutting Down!\n",wandev->name);
513
514 for (dev = wandev->dev; dev;) {
515 err = wanrouter_delete_interface(wandev, dev->name);
516 if (err)
517 return err;
518
519
520
521
522 dev = wandev->dev;
523 }
524
525 if (wandev->ndev)
526 return -EBUSY;
527
528 if (wandev->shutdown)
529 err=wandev->shutdown(wandev);
530
531 return err;
532}
533
534
535
536
537
538static int wanrouter_device_stat(struct wan_device *wandev,
539 wandev_stat_t __user *u_stat)
540{
541 wandev_stat_t stat;
542
543 memset(&stat, 0, sizeof(stat));
544
545
546 if ((wandev->state != WAN_UNCONFIGURED) && wandev->update)
547 wandev->update(wandev);
548
549
550 stat.ndev = wandev->ndev;
551 stat.state = wandev->state;
552
553 if (copy_to_user(u_stat, &stat, sizeof(stat)))
554 return -EFAULT;
555
556 return 0;
557}
558
559
560
561
562
563
564
565
566
567
568
569static int wanrouter_device_new_if(struct wan_device *wandev,
570 wanif_conf_t __user *u_conf)
571{
572 wanif_conf_t *cnf;
573 struct net_device *dev = NULL;
574 int err;
575
576 if ((wandev->state == WAN_UNCONFIGURED) || (wandev->new_if == NULL))
577 return -ENODEV;
578
579 cnf = kmalloc(sizeof(wanif_conf_t), GFP_KERNEL);
580 if (!cnf)
581 return -ENOBUFS;
582
583 err = -EFAULT;
584 if (copy_from_user(cnf, u_conf, sizeof(wanif_conf_t)))
585 goto out;
586
587 err = -EINVAL;
588 if (cnf->magic != ROUTER_MAGIC)
589 goto out;
590
591 if (cnf->config_id == WANCONFIG_MPPP) {
592 printk(KERN_INFO "%s: Wanpipe Mulit-Port PPP support has not been compiled in!\n",
593 wandev->name);
594 err = -EPROTONOSUPPORT;
595 goto out;
596 } else {
597 err = wandev->new_if(wandev, dev, cnf);
598 }
599
600 if (!err) {
601
602
603
604
605
606 if (dev->name == NULL) {
607 err = -EINVAL;
608 } else {
609
610 #ifdef WANDEBUG
611 printk(KERN_INFO "%s: registering interface %s...\n",
612 wanrouter_modname, dev->name);
613 #endif
614
615 err = register_netdev(dev);
616 if (!err) {
617 struct net_device *slave = NULL;
618 unsigned long smp_flags=0;
619
620 lock_adapter_irq(&wandev->lock, &smp_flags);
621
622 if (wandev->dev == NULL) {
623 wandev->dev = dev;
624 } else {
625 for (slave=wandev->dev;
626 DEV_TO_SLAVE(slave);
627 slave = DEV_TO_SLAVE(slave))
628 DEV_TO_SLAVE(slave) = dev;
629 }
630 ++wandev->ndev;
631
632 unlock_adapter_irq(&wandev->lock, &smp_flags);
633 err = 0;
634 goto out;
635 }
636 }
637 if (wandev->del_if)
638 wandev->del_if(wandev, dev);
639 free_netdev(dev);
640 }
641
642out:
643 kfree(cnf);
644 return err;
645}
646
647
648
649
650
651
652
653
654static int wanrouter_device_del_if(struct wan_device *wandev, char __user *u_name)
655{
656 char name[WAN_IFNAME_SZ + 1];
657 int err = 0;
658
659 if (wandev->state == WAN_UNCONFIGURED)
660 return -ENODEV;
661
662 memset(name, 0, sizeof(name));
663
664 if (copy_from_user(name, u_name, WAN_IFNAME_SZ))
665 return -EFAULT;
666
667 err = wanrouter_delete_interface(wandev, name);
668 if (err)
669 return err;
670
671
672
673
674
675
676
677
678
679
680 if (!wandev->ndev && wandev->shutdown)
681 err = wandev->shutdown(wandev);
682
683 return err;
684}
685
686
687
688
689
690
691
692
693
694
695static struct wan_device *wanrouter_find_device(char *name)
696{
697 struct wan_device *wandev;
698
699 for (wandev = wanrouter_router_devlist;
700 wandev && strcmp(wandev->name, name);
701 wandev = wandev->next);
702 return wandev;
703}
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722static int wanrouter_delete_interface(struct wan_device *wandev, char *name)
723{
724 struct net_device *dev = NULL, *prev = NULL;
725 unsigned long smp_flags=0;
726
727 lock_adapter_irq(&wandev->lock, &smp_flags);
728 dev = wandev->dev;
729 prev = NULL;
730 while (dev && strcmp(name, dev->name)) {
731 struct net_device **slave = netdev_priv(dev);
732 prev = dev;
733 dev = *slave;
734 }
735 unlock_adapter_irq(&wandev->lock, &smp_flags);
736
737 if (dev == NULL)
738 return -ENODEV;
739
740 if (netif_running(dev))
741 return -EBUSY;
742
743 if (wandev->del_if)
744 wandev->del_if(wandev, dev);
745
746 lock_adapter_irq(&wandev->lock, &smp_flags);
747 if (prev) {
748 struct net_device **prev_slave = netdev_priv(prev);
749 struct net_device **slave = netdev_priv(dev);
750
751 *prev_slave = *slave;
752 } else {
753 struct net_device **slave = netdev_priv(dev);
754 wandev->dev = *slave;
755 }
756 --wandev->ndev;
757 unlock_adapter_irq(&wandev->lock, &smp_flags);
758
759 printk(KERN_INFO "%s: unregistering '%s'\n", wandev->name, dev->name);
760
761 unregister_netdev(dev);
762
763 free_netdev(dev);
764
765 return 0;
766}
767
768static void lock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags)
769 __acquires(lock)
770{
771 spin_lock_irqsave(lock, *smp_flags);
772}
773
774
775static void unlock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags)
776 __releases(lock)
777{
778 spin_unlock_irqrestore(lock, *smp_flags);
779}
780
781EXPORT_SYMBOL(register_wan_device);
782EXPORT_SYMBOL(unregister_wan_device);
783
784MODULE_LICENSE("GPL");
785
786
787
788
789