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1da177e4
LT		 1/*
2 * DECnet An implementation of the DECnet protocol suite for the LINUX
3 * operating system. DECnet is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * DECnet Device Layer
7 *
8 * Authors: Steve Whitehouse <SteveW@ACM.org>
9 * Eduardo Marcelo Serrat <emserrat@geocities.com>
10 *
11 * Changes:
12 * Steve Whitehouse : Devices now see incoming frames so they
13 * can mark on who it came from.
14 * Steve Whitehouse : Fixed bug in creating neighbours. Each neighbour
15 * can now have a device specific setup func.
16 * Steve Whitehouse : Added /proc/sys/net/decnet/conf/<dev>/
17 * Steve Whitehouse : Fixed bug which sometimes killed timer
18 * Steve Whitehouse : Multiple ifaddr support
19 * Steve Whitehouse : SIOCGIFCONF is now a compile time option
20 * Steve Whitehouse : /proc/sys/net/decnet/conf/<sys>/forwarding
21 * Steve Whitehouse : Removed timer1 - it's a user space issue now
22 * Patrick Caulfield : Fixed router hello message format
23 * Steve Whitehouse : Got rid of constant sizes for blksize for
24 * devices. All mtu based now.
25 */
26
27#include <linux/config.h>
28#include <linux/module.h>
29#include <linux/moduleparam.h>
30#include <linux/init.h>
31#include <linux/net.h>
32#include <linux/netdevice.h>
33#include <linux/proc_fs.h>
34#include <linux/seq_file.h>
35#include <linux/timer.h>
36#include <linux/string.h>
37#include <linux/if_arp.h>
38#include <linux/if_ether.h>
39#include <linux/skbuff.h>
40#include <linux/rtnetlink.h>
41#include <linux/sysctl.h>
42#include <linux/notifier.h>
43#include <asm/uaccess.h>
44#include <asm/system.h>
45#include <net/neighbour.h>
46#include <net/dst.h>
47#include <net/flow.h>
48#include <net/dn.h>
49#include <net/dn_dev.h>
50#include <net/dn_route.h>
51#include <net/dn_neigh.h>
52#include <net/dn_fib.h>
53
54#define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
55
56static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
57static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
58static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
59static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
60
61extern struct neigh_table dn_neigh_table;
62
63/*
64 * decnet_address is kept in network order.
65 */
66dn_address decnet_address = 0;
67
68static DEFINE_RWLOCK(dndev_lock);
69static struct net_device *decnet_default_device;
70static struct notifier_block *dnaddr_chain;
71
72static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
73static void dn_dev_delete(struct net_device *dev);
74static void rtmsg_ifa(int event, struct dn_ifaddr *ifa);
75
76static int dn_eth_up(struct net_device *);
77static void dn_eth_down(struct net_device *);
78static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
79static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
80
81static struct dn_dev_parms dn_dev_list[] = {
82{
83 .type = ARPHRD_ETHER, /* Ethernet */
84 .mode = DN_DEV_BCAST,
85 .state = DN_DEV_S_RU,
86 .t2 = 1,
87 .t3 = 10,
88 .name = "ethernet",
89 .ctl_name = NET_DECNET_CONF_ETHER,
90 .up = dn_eth_up,
91 .down = dn_eth_down,
92 .timer3 = dn_send_brd_hello,
93},
94{
95 .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */
96 .mode = DN_DEV_BCAST,
97 .state = DN_DEV_S_RU,
98 .t2 = 1,
99 .t3 = 10,
100 .name = "ipgre",
101 .ctl_name = NET_DECNET_CONF_GRE,
102 .timer3 = dn_send_brd_hello,
103},
104#if 0
105{
106 .type = ARPHRD_X25, /* Bog standard X.25 */
107 .mode = DN_DEV_UCAST,
108 .state = DN_DEV_S_DS,
109 .t2 = 1,
110 .t3 = 120,
111 .name = "x25",
112 .ctl_name = NET_DECNET_CONF_X25,
113 .timer3 = dn_send_ptp_hello,
114},
115#endif
116#if 0
117{
118 .type = ARPHRD_PPP, /* DECnet over PPP */
119 .mode = DN_DEV_BCAST,
120 .state = DN_DEV_S_RU,
121 .t2 = 1,
122 .t3 = 10,
123 .name = "ppp",
124 .ctl_name = NET_DECNET_CONF_PPP,
125 .timer3 = dn_send_brd_hello,
126},
127#endif
128{
129 .type = ARPHRD_DDCMP, /* DECnet over DDCMP */
130 .mode = DN_DEV_UCAST,
131 .state = DN_DEV_S_DS,
132 .t2 = 1,
133 .t3 = 120,
134 .name = "ddcmp",
135 .ctl_name = NET_DECNET_CONF_DDCMP,
136 .timer3 = dn_send_ptp_hello,
137},
138{
139 .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
140 .mode = DN_DEV_BCAST,
141 .state = DN_DEV_S_RU,
142 .t2 = 1,
143 .t3 = 10,
144 .name = "loopback",
145 .ctl_name = NET_DECNET_CONF_LOOPBACK,
146 .timer3 = dn_send_brd_hello,
147}
148};
149
150#define DN_DEV_LIST_SIZE (sizeof(dn_dev_list)/sizeof(struct dn_dev_parms))
151
152#define DN_DEV_PARMS_OFFSET(x) ((int) ((char *) &((struct dn_dev_parms *)0)->x))
153
154#ifdef CONFIG_SYSCTL
155
156static int min_t2[] = { 1 };
157static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
158static int min_t3[] = { 1 };
159static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
160
161static int min_priority[1];
162static int max_priority[] = { 127 }; /* From DECnet spec */
163
164static int dn_forwarding_proc(ctl_table *, int, struct file *,
165 void __user *, size_t *, loff_t *);
166static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
167 void __user *oldval, size_t __user *oldlenp,
168 void __user *newval, size_t newlen,
169 void **context);
170
171static struct dn_dev_sysctl_table {
172 struct ctl_table_header *sysctl_header;
173 ctl_table dn_dev_vars[5];
174 ctl_table dn_dev_dev[2];
175 ctl_table dn_dev_conf_dir[2];
176 ctl_table dn_dev_proto_dir[2];
177 ctl_table dn_dev_root_dir[2];
178} dn_dev_sysctl = {
179 NULL,
180 {
181 {
182 .ctl_name = NET_DECNET_CONF_DEV_FORWARDING,
183 .procname = "forwarding",
184 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
185 .maxlen = sizeof(int),
186 .mode = 0644,
187 .proc_handler = dn_forwarding_proc,
188 .strategy = dn_forwarding_sysctl,
189 },
190 {
191 .ctl_name = NET_DECNET_CONF_DEV_PRIORITY,
192 .procname = "priority",
193 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
194 .maxlen = sizeof(int),
195 .mode = 0644,
196 .proc_handler = proc_dointvec_minmax,
197 .strategy = sysctl_intvec,
198 .extra1 = &min_priority,
199 .extra2 = &max_priority
200 },
201 {
202 .ctl_name = NET_DECNET_CONF_DEV_T2,
203 .procname = "t2",
204 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
205 .maxlen = sizeof(int),
206 .mode = 0644,
207 .proc_handler = proc_dointvec_minmax,
208 .strategy = sysctl_intvec,
209 .extra1 = &min_t2,
210 .extra2 = &max_t2
211 },
212 {
213 .ctl_name = NET_DECNET_CONF_DEV_T3,
214 .procname = "t3",
215 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
216 .maxlen = sizeof(int),
217 .mode = 0644,
218 .proc_handler = proc_dointvec_minmax,
219 .strategy = sysctl_intvec,
220 .extra1 = &min_t3,
221 .extra2 = &max_t3
222 },
223 {0}
224 },
225 {{
226 .ctl_name = 0,
227 .procname = "",
228 .mode = 0555,
229 .child = dn_dev_sysctl.dn_dev_vars
230 }, {0}},
231 {{
232 .ctl_name = NET_DECNET_CONF,
233 .procname = "conf",
234 .mode = 0555,
235 .child = dn_dev_sysctl.dn_dev_dev
236 }, {0}},
237 {{
238 .ctl_name = NET_DECNET,
239 .procname = "decnet",
240 .mode = 0555,
241 .child = dn_dev_sysctl.dn_dev_conf_dir
242 }, {0}},
243 {{
244 .ctl_name = CTL_NET,
245 .procname = "net",
246 .mode = 0555,
247 .child = dn_dev_sysctl.dn_dev_proto_dir
248 }, {0}}
249};
250
251static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
252{
253 struct dn_dev_sysctl_table *t;
254 int i;
255
256 t = kmalloc(sizeof(*t), GFP_KERNEL);
257 if (t == NULL)
258 return;
259
260 memcpy(t, &dn_dev_sysctl, sizeof(*t));
261
262 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
263 long offset = (long)t->dn_dev_vars[i].data;
264 t->dn_dev_vars[i].data = ((char *)parms) + offset;
265 t->dn_dev_vars[i].de = NULL;
266 }
267
268 if (dev) {
269 t->dn_dev_dev[0].procname = dev->name;
270 t->dn_dev_dev[0].ctl_name = dev->ifindex;
271 } else {
272 t->dn_dev_dev[0].procname = parms->name;
273 t->dn_dev_dev[0].ctl_name = parms->ctl_name;
274 }
275
276 t->dn_dev_dev[0].child = t->dn_dev_vars;
277 t->dn_dev_dev[0].de = NULL;
278 t->dn_dev_conf_dir[0].child = t->dn_dev_dev;
279 t->dn_dev_conf_dir[0].de = NULL;
280 t->dn_dev_proto_dir[0].child = t->dn_dev_conf_dir;
281 t->dn_dev_proto_dir[0].de = NULL;
282 t->dn_dev_root_dir[0].child = t->dn_dev_proto_dir;
283 t->dn_dev_root_dir[0].de = NULL;
284 t->dn_dev_vars[0].extra1 = (void *)dev;
285
286 t->sysctl_header = register_sysctl_table(t->dn_dev_root_dir, 0);
287 if (t->sysctl_header == NULL)
288 kfree(t);
289 else
290 parms->sysctl = t;
291}
292
293static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
294{
295 if (parms->sysctl) {
296 struct dn_dev_sysctl_table *t = parms->sysctl;
297 parms->sysctl = NULL;
298 unregister_sysctl_table(t->sysctl_header);
299 kfree(t);
300 }
301}
302
303static int dn_forwarding_proc(ctl_table *table, int write,
304 struct file *filep,
305 void __user *buffer,
306 size_t *lenp, loff_t *ppos)
307{
308#ifdef CONFIG_DECNET_ROUTER
309 struct net_device *dev = table->extra1;
310 struct dn_dev *dn_db;
311 int err;
312 int tmp, old;
313
314 if (table->extra1 == NULL)
315 return -EINVAL;
316
317 dn_db = dev->dn_ptr;
318 old = dn_db->parms.forwarding;
319
320 err = proc_dointvec(table, write, filep, buffer, lenp, ppos);
321
322 if ((err >= 0) && write) {
323 if (dn_db->parms.forwarding < 0)
324 dn_db->parms.forwarding = 0;
325 if (dn_db->parms.forwarding > 2)
326 dn_db->parms.forwarding = 2;
327 /*
328 * What an ugly hack this is... its works, just. It
329 * would be nice if sysctl/proc were just that little
330 * bit more flexible so I don't have to write a special
331 * routine, or suffer hacks like this - SJW
332 */
333 tmp = dn_db->parms.forwarding;
334 dn_db->parms.forwarding = old;
335 if (dn_db->parms.down)
336 dn_db->parms.down(dev);
337 dn_db->parms.forwarding = tmp;
338 if (dn_db->parms.up)
339 dn_db->parms.up(dev);
340 }
341
342 return err;
343#else
344 return -EINVAL;
345#endif
346}
347
348static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
349 void __user *oldval, size_t __user *oldlenp,
350 void __user *newval, size_t newlen,
351 void **context)
352{
353#ifdef CONFIG_DECNET_ROUTER
354 struct net_device *dev = table->extra1;
355 struct dn_dev *dn_db;
356 int value;
357
358 if (table->extra1 == NULL)
359 return -EINVAL;
360
361 dn_db = dev->dn_ptr;
362
363 if (newval && newlen) {
364 if (newlen != sizeof(int))
365 return -EINVAL;
366
367 if (get_user(value, (int __user *)newval))
368 return -EFAULT;
369 if (value < 0)
370 return -EINVAL;
371 if (value > 2)
372 return -EINVAL;
373
374 if (dn_db->parms.down)
375 dn_db->parms.down(dev);
376 dn_db->parms.forwarding = value;
377 if (dn_db->parms.up)
378 dn_db->parms.up(dev);
379 }
380
381 return 0;
382#else
383 return -EINVAL;
384#endif
385}
386
387#else /* CONFIG_SYSCTL */
388static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
389{
390}
391static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
392{
393}
394
395#endif /* CONFIG_SYSCTL */
396
397static inline __u16 mtu2blksize(struct net_device *dev)
398{
399 u32 blksize = dev->mtu;
400 if (blksize > 0xffff)
401 blksize = 0xffff;
402
403 if (dev->type == ARPHRD_ETHER ||
404 dev->type == ARPHRD_PPP ||
405 dev->type == ARPHRD_IPGRE ||
406 dev->type == ARPHRD_LOOPBACK)
407 blksize -= 2;
408
409 return (__u16)blksize;
410}
411
412static struct dn_ifaddr *dn_dev_alloc_ifa(void)
413{
414 struct dn_ifaddr *ifa;
415
416 ifa = kmalloc(sizeof(*ifa), GFP_KERNEL);
417
418 if (ifa) {
419 memset(ifa, 0, sizeof(*ifa));
420 }
421
422 return ifa;
423}
424
425static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
426{
427 kfree(ifa);
428}
429
430static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
431{
432 struct dn_ifaddr *ifa1 = *ifap;
433 unsigned char mac_addr[6];
434 struct net_device *dev = dn_db->dev;
435
436 ASSERT_RTNL();
437
438 *ifap = ifa1->ifa_next;
439
440 if (dn_db->dev->type == ARPHRD_ETHER) {
441 if (ifa1->ifa_local != dn_htons(dn_eth2dn(dev->dev_addr))) {
442 dn_dn2eth(mac_addr, ifa1->ifa_local);
443 dev_mc_delete(dev, mac_addr, ETH_ALEN, 0);
444 }
445 }
446
447 rtmsg_ifa(RTM_DELADDR, ifa1);
448 notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
449 if (destroy) {
450 dn_dev_free_ifa(ifa1);
451
452 if (dn_db->ifa_list == NULL)
453 dn_dev_delete(dn_db->dev);
454 }
455}
456
457static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
458{
459 struct net_device *dev = dn_db->dev;
460 struct dn_ifaddr *ifa1;
461 unsigned char mac_addr[6];
462
463 ASSERT_RTNL();
464
465 /* Check for duplicates */
466 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
467 if (ifa1->ifa_local == ifa->ifa_local)
468 return -EEXIST;
469 }
470
471 if (dev->type == ARPHRD_ETHER) {
472 if (ifa->ifa_local != dn_htons(dn_eth2dn(dev->dev_addr))) {
473 dn_dn2eth(mac_addr, ifa->ifa_local);
474 dev_mc_add(dev, mac_addr, ETH_ALEN, 0);
475 dev_mc_upload(dev);
476 }
477 }
478
479 ifa->ifa_next = dn_db->ifa_list;
480 dn_db->ifa_list = ifa;
481
482 rtmsg_ifa(RTM_NEWADDR, ifa);
483 notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
484
485 return 0;
486}
487
488static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
489{
490 struct dn_dev *dn_db = dev->dn_ptr;
491 int rv;
492
493 if (dn_db == NULL) {
494 int err;
495 dn_db = dn_dev_create(dev, &err);
496 if (dn_db == NULL)
497 return err;
498 }
499
500 ifa->ifa_dev = dn_db;
501
502 if (dev->flags & IFF_LOOPBACK)
503 ifa->ifa_scope = RT_SCOPE_HOST;
504
505 rv = dn_dev_insert_ifa(dn_db, ifa);
506 if (rv)
507 dn_dev_free_ifa(ifa);
508 return rv;
509}
510
511
512int dn_dev_ioctl(unsigned int cmd, void __user *arg)
513{
514 char buffer[DN_IFREQ_SIZE];
515 struct ifreq *ifr = (struct ifreq *)buffer;
516 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
517 struct dn_dev *dn_db;
518 struct net_device *dev;
519 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
520 int ret = 0;
521
522 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
523 return -EFAULT;
524 ifr->ifr_name[IFNAMSIZ-1] = 0;
525
526#ifdef CONFIG_KMOD
527 dev_load(ifr->ifr_name);
528#endif
529
530 switch(cmd) {
531 case SIOCGIFADDR:
532 break;
533 case SIOCSIFADDR:
534 if (!capable(CAP_NET_ADMIN))
535 return -EACCES;
536 if (sdn->sdn_family != AF_DECnet)
537 return -EINVAL;
538 break;
539 default:
540 return -EINVAL;
541 }
542
543 rtnl_lock();
544
545 if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL) {
546 ret = -ENODEV;
547 goto done;
548 }
549
550 if ((dn_db = dev->dn_ptr) != NULL) {
551 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
552 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
553 break;
554 }
555
556 if (ifa == NULL && cmd != SIOCSIFADDR) {
557 ret = -EADDRNOTAVAIL;
558 goto done;
559 }
560
561 switch(cmd) {
562 case SIOCGIFADDR:
563 *((dn_address *)sdn->sdn_nodeaddr) = ifa->ifa_local;
564 goto rarok;
565
566 case SIOCSIFADDR:
567 if (!ifa) {
568 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
569 ret = -ENOBUFS;
570 break;
571 }
572 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
573 } else {
574 if (ifa->ifa_local == dn_saddr2dn(sdn))
575 break;
576 dn_dev_del_ifa(dn_db, ifap, 0);
577 }
578
579 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
580
581 ret = dn_dev_set_ifa(dev, ifa);
582 }
583done:
584 rtnl_unlock();
585
586 return ret;
587rarok:
588 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
589 ret = -EFAULT;
590 goto done;
591}
592
593struct net_device *dn_dev_get_default(void)
594{
595 struct net_device *dev;
596 read_lock(&dndev_lock);
597 dev = decnet_default_device;
598 if (dev) {
599 if (dev->dn_ptr)
600 dev_hold(dev);
601 else
602 dev = NULL;
603 }
604 read_unlock(&dndev_lock);
605 return dev;
606}
607
608int dn_dev_set_default(struct net_device *dev, int force)
609{
610 struct net_device *old = NULL;
611 int rv = -EBUSY;
612 if (!dev->dn_ptr)
613 return -ENODEV;
614 write_lock(&dndev_lock);
615 if (force || decnet_default_device == NULL) {
616 old = decnet_default_device;
617 decnet_default_device = dev;
618 rv = 0;
619 }
620 write_unlock(&dndev_lock);
621 if (old)
622 dev_put(dev);
623 return rv;
624}
625
626static void dn_dev_check_default(struct net_device *dev)
627{
628 write_lock(&dndev_lock);
629 if (dev == decnet_default_device) {
630 decnet_default_device = NULL;
631 } else {
632 dev = NULL;
633 }
634 write_unlock(&dndev_lock);
635 if (dev)
636 dev_put(dev);
637}
638
639static struct dn_dev *dn_dev_by_index(int ifindex)
640{
641 struct net_device *dev;
642 struct dn_dev *dn_dev = NULL;
643 dev = dev_get_by_index(ifindex);
644 if (dev) {
645 dn_dev = dev->dn_ptr;
646 dev_put(dev);
647 }
648
649 return dn_dev;
650}
651
652static int dn_dev_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
653{
654 struct rtattr **rta = arg;
655 struct dn_dev *dn_db;
656 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
657 struct dn_ifaddr *ifa, **ifap;
658
659 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
660 return -EADDRNOTAVAIL;
661
662 for(ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next) {
663 void *tmp = rta[IFA_LOCAL-1];
664 if ((tmp && memcmp(RTA_DATA(tmp), &ifa->ifa_local, 2)) ||
665 (rta[IFA_LABEL-1] && rtattr_strcmp(rta[IFA_LABEL-1], ifa->ifa_label)))
666 continue;
667
668 dn_dev_del_ifa(dn_db, ifap, 1);
669 return 0;
670 }
671
672 return -EADDRNOTAVAIL;
673}
674
675static int dn_dev_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
676{
677 struct rtattr **rta = arg;
678 struct net_device *dev;
679 struct dn_dev *dn_db;
680 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
681 struct dn_ifaddr *ifa;
682 int rv;
683
684 if (rta[IFA_LOCAL-1] == NULL)
685 return -EINVAL;
686
687 if ((dev = __dev_get_by_index(ifm->ifa_index)) == NULL)
688 return -ENODEV;
689
690 if ((dn_db = dev->dn_ptr) == NULL) {
691 int err;
692 dn_db = dn_dev_create(dev, &err);
693 if (!dn_db)
694 return err;
695 }
696
697 if ((ifa = dn_dev_alloc_ifa()) == NULL)
698 return -ENOBUFS;
699
700 if (!rta[IFA_ADDRESS - 1])
701 rta[IFA_ADDRESS - 1] = rta[IFA_LOCAL - 1];
702 memcpy(&ifa->ifa_local, RTA_DATA(rta[IFA_LOCAL-1]), 2);
703 memcpy(&ifa->ifa_address, RTA_DATA(rta[IFA_ADDRESS-1]), 2);
704 ifa->ifa_flags = ifm->ifa_flags;
705 ifa->ifa_scope = ifm->ifa_scope;
706 ifa->ifa_dev = dn_db;
707 if (rta[IFA_LABEL-1])
708 rtattr_strlcpy(ifa->ifa_label, rta[IFA_LABEL-1], IFNAMSIZ);
709 else
710 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
711
712 rv = dn_dev_insert_ifa(dn_db, ifa);
713 if (rv)
714 dn_dev_free_ifa(ifa);
715 return rv;
716}
717
718static int dn_dev_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
b6544c0b 719 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 720{
721 struct ifaddrmsg *ifm;
722 struct nlmsghdr *nlh;
723 unsigned char *b = skb->tail;
724
b6544c0b 725 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
1da177e4
LT		 726 ifm = NLMSG_DATA(nlh);
727
728 ifm->ifa_family = AF_DECnet;
729 ifm->ifa_prefixlen = 16;
730 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
731 ifm->ifa_scope = ifa->ifa_scope;
732 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
733 if (ifa->ifa_address)
734 RTA_PUT(skb, IFA_ADDRESS, 2, &ifa->ifa_address);
735 if (ifa->ifa_local)
736 RTA_PUT(skb, IFA_LOCAL, 2, &ifa->ifa_local);
737 if (ifa->ifa_label[0])
738 RTA_PUT(skb, IFA_LABEL, IFNAMSIZ, &ifa->ifa_label);
739 nlh->nlmsg_len = skb->tail - b;
740 return skb->len;
741
742nlmsg_failure:
743rtattr_failure:
744 skb_trim(skb, b - skb->data);
745 return -1;
746}
747
748static void rtmsg_ifa(int event, struct dn_ifaddr *ifa)
749{
750 struct sk_buff *skb;
751 int size = NLMSG_SPACE(sizeof(struct ifaddrmsg)+128);
752
753 skb = alloc_skb(size, GFP_KERNEL);
754 if (!skb) {
ac6d439d 755 netlink_set_err(rtnl, 0, RTNLGRP_DECnet_IFADDR, ENOBUFS);
1da177e4
LT		 756 return;
757 }
b6544c0b 758 if (dn_dev_fill_ifaddr(skb, ifa, 0, 0, event, 0) < 0) {
1da177e4 759 kfree_skb(skb);
ac6d439d 760 netlink_set_err(rtnl, 0, RTNLGRP_DECnet_IFADDR, EINVAL);
1da177e4
LT		 761 return;
762 }
ac6d439d
PM		 763 NETLINK_CB(skb).dst_group = RTNLGRP_DECnet_IFADDR;
764 netlink_broadcast(rtnl, skb, 0, RTNLGRP_DECnet_IFADDR, GFP_KERNEL);
1da177e4
LT		 765}
766
767static int dn_dev_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
768{
769 int idx, dn_idx;
770 int s_idx, s_dn_idx;
771 struct net_device *dev;
772 struct dn_dev *dn_db;
773 struct dn_ifaddr *ifa;
774
775 s_idx = cb->args[0];
776 s_dn_idx = dn_idx = cb->args[1];
777 read_lock(&dev_base_lock);
778 for(dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
779 if (idx < s_idx)
780 continue;
781 if (idx > s_idx)
782 s_dn_idx = 0;
783 if ((dn_db = dev->dn_ptr) == NULL)
784 continue;
785
786 for(ifa = dn_db->ifa_list, dn_idx = 0; ifa; ifa = ifa->ifa_next, dn_idx++) {
787 if (dn_idx < s_dn_idx)
788 continue;
789
790 if (dn_dev_fill_ifaddr(skb, ifa,
791 NETLINK_CB(cb->skb).pid,
792 cb->nlh->nlmsg_seq,
b6544c0b
JHS		 793 RTM_NEWADDR,
794 NLM_F_MULTI) <= 0)
1da177e4
LT		 795 goto done;
796 }
797 }
798done:
799 read_unlock(&dev_base_lock);
800 cb->args[0] = idx;
801 cb->args[1] = dn_idx;
802
803 return skb->len;
804}
805
806static int dn_dev_get_first(struct net_device *dev, dn_address *addr)
807{
808 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
809 struct dn_ifaddr *ifa;
810 int rv = -ENODEV;
811 if (dn_db == NULL)
812 goto out;
813 ifa = dn_db->ifa_list;
814 if (ifa != NULL) {
815 *addr = ifa->ifa_local;
816 rv = 0;
817 }
818out:
819 return rv;
820}
821
822/*
823 * Find a default address to bind to.
824 *
825 * This is one of those areas where the initial VMS concepts don't really
826 * map onto the Linux concepts, and since we introduced multiple addresses
827 * per interface we have to cope with slightly odd ways of finding out what
828 * "our address" really is. Mostly it's not a problem; for this we just guess
829 * a sensible default. Eventually the routing code will take care of all the
830 * nasties for us I hope.
831 */
832int dn_dev_bind_default(dn_address *addr)
833{
834 struct net_device *dev;
835 int rv;
836 dev = dn_dev_get_default();
837last_chance:
838 if (dev) {
839 read_lock(&dev_base_lock);
840 rv = dn_dev_get_first(dev, addr);
841 read_unlock(&dev_base_lock);
842 dev_put(dev);
843 if (rv == 0 || dev == &loopback_dev)
844 return rv;
845 }
846 dev = &loopback_dev;
847 dev_hold(dev);
848 goto last_chance;
849}
850
851static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
852{
853 struct endnode_hello_message *msg;
854 struct sk_buff *skb = NULL;
855 unsigned short int *pktlen;
856 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
857
858 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
859 return;
860
861 skb->dev = dev;
862
863 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
864
865 msg->msgflg = 0x0D;
866 memcpy(msg->tiver, dn_eco_version, 3);
867 dn_dn2eth(msg->id, ifa->ifa_local);
868 msg->iinfo = DN_RT_INFO_ENDN;
869 msg->blksize = dn_htons(mtu2blksize(dev));
870 msg->area = 0x00;
871 memset(msg->seed, 0, 8);
872 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
873
874 if (dn_db->router) {
875 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
876 dn_dn2eth(msg->neighbor, dn->addr);
877 }
878
879 msg->timer = dn_htons((unsigned short)dn_db->parms.t3);
880 msg->mpd = 0x00;
881 msg->datalen = 0x02;
882 memset(msg->data, 0xAA, 2);
883
884 pktlen = (unsigned short *)skb_push(skb,2);
885 *pktlen = dn_htons(skb->len - 2);
886
887 skb->nh.raw = skb->data;
888
889 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
890}
891
892
893#define DRDELAY (5 * HZ)
894
895static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
896{
897 /* First check time since device went up */
898 if ((jiffies - dn_db->uptime) < DRDELAY)
899 return 0;
900
901 /* If there is no router, then yes... */
902 if (!dn_db->router)
903 return 1;
904
905 /* otherwise only if we have a higher priority or.. */
906 if (dn->priority < dn_db->parms.priority)
907 return 1;
908
909 /* if we have equal priority and a higher node number */
910 if (dn->priority != dn_db->parms.priority)
911 return 0;
912
913 if (dn_ntohs(dn->addr) < dn_ntohs(ifa->ifa_local))
914 return 1;
915
916 return 0;
917}
918
919static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
920{
921 int n;
922 struct dn_dev *dn_db = dev->dn_ptr;
923 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
924 struct sk_buff *skb;
925 size_t size;
926 unsigned char *ptr;
927 unsigned char *i1, *i2;
928 unsigned short *pktlen;
929 char *src;
930
931 if (mtu2blksize(dev) < (26 + 7))
932 return;
933
934 n = mtu2blksize(dev) - 26;
935 n /= 7;
936
937 if (n > 32)
938 n = 32;
939
940 size = 2 + 26 + 7 * n;
941
942 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
943 return;
944
945 skb->dev = dev;
946 ptr = skb_put(skb, size);
947
948 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
949 *ptr++ = 2; /* ECO */
950 *ptr++ = 0;
951 *ptr++ = 0;
952 dn_dn2eth(ptr, ifa->ifa_local);
953 src = ptr;
954 ptr += ETH_ALEN;
955 *ptr++ = dn_db->parms.forwarding == 1 ?
956 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
957 *((unsigned short *)ptr) = dn_htons(mtu2blksize(dev));
958 ptr += 2;
959 *ptr++ = dn_db->parms.priority; /* Priority */
960 *ptr++ = 0; /* Area: Reserved */
961 *((unsigned short *)ptr) = dn_htons((unsigned short)dn_db->parms.t3);
962 ptr += 2;
963 *ptr++ = 0; /* MPD: Reserved */
964 i1 = ptr++;
965 memset(ptr, 0, 7); /* Name: Reserved */
966 ptr += 7;
967 i2 = ptr++;
968
969 n = dn_neigh_elist(dev, ptr, n);
970
971 *i2 = 7 * n;
972 *i1 = 8 + *i2;
973
974 skb_trim(skb, (27 + *i2));
975
976 pktlen = (unsigned short *)skb_push(skb, 2);
977 *pktlen = dn_htons(skb->len - 2);
978
979 skb->nh.raw = skb->data;
980
981 if (dn_am_i_a_router(dn, dn_db, ifa)) {
982 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
983 if (skb2) {
984 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
985 }
986 }
987
988 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
989}
990
991static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
992{
993 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
994
995 if (dn_db->parms.forwarding == 0)
996 dn_send_endnode_hello(dev, ifa);
997 else
998 dn_send_router_hello(dev, ifa);
999}
1000
1001static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1002{
1003 int tdlen = 16;
1004 int size = dev->hard_header_len + 2 + 4 + tdlen;
1005 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
1006 int i;
1007 unsigned char *ptr;
1008 char src[ETH_ALEN];
1009
1010 if (skb == NULL)
1011 return ;
1012
1013 skb->dev = dev;
1014 skb_push(skb, dev->hard_header_len);
1015 ptr = skb_put(skb, 2 + 4 + tdlen);
1016
1017 *ptr++ = DN_RT_PKT_HELO;
1018 *((dn_address *)ptr) = ifa->ifa_local;
1019 ptr += 2;
1020 *ptr++ = tdlen;
1021
1022 for(i = 0; i < tdlen; i++)
1023 *ptr++ = 0252;
1024
1025 dn_dn2eth(src, ifa->ifa_local);
1026 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1027}
1028
1029static int dn_eth_up(struct net_device *dev)
1030{
1031 struct dn_dev *dn_db = dev->dn_ptr;
1032
1033 if (dn_db->parms.forwarding == 0)
1034 dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1035 else
1036 dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1037
1038 dev_mc_upload(dev);
1039
1040 dn_db->use_long = 1;
1041
1042 return 0;
1043}
1044
1045static void dn_eth_down(struct net_device *dev)
1046{
1047 struct dn_dev *dn_db = dev->dn_ptr;
1048
1049 if (dn_db->parms.forwarding == 0)
1050 dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1051 else
1052 dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1053}
1054
1055static void dn_dev_set_timer(struct net_device *dev);
1056
1057static void dn_dev_timer_func(unsigned long arg)
1058{
1059 struct net_device *dev = (struct net_device *)arg;
1060 struct dn_dev *dn_db = dev->dn_ptr;
1061 struct dn_ifaddr *ifa;
1062
1063 if (dn_db->t3 <= dn_db->parms.t2) {
1064 if (dn_db->parms.timer3) {
1065 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1066 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1067 dn_db->parms.timer3(dev, ifa);
1068 }
1069 }
1070 dn_db->t3 = dn_db->parms.t3;
1071 } else {
1072 dn_db->t3 -= dn_db->parms.t2;
1073 }
1074
1075 dn_dev_set_timer(dev);
1076}
1077
1078static void dn_dev_set_timer(struct net_device *dev)
1079{
1080 struct dn_dev *dn_db = dev->dn_ptr;
1081
1082 if (dn_db->parms.t2 > dn_db->parms.t3)
1083 dn_db->parms.t2 = dn_db->parms.t3;
1084
1085 dn_db->timer.data = (unsigned long)dev;
1086 dn_db->timer.function = dn_dev_timer_func;
1087 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1088
1089 add_timer(&dn_db->timer);
1090}
1091
1092struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1093{
1094 int i;
1095 struct dn_dev_parms *p = dn_dev_list;
1096 struct dn_dev *dn_db;
1097
1098 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1099 if (p->type == dev->type)
1100 break;
1101 }
1102
1103 *err = -ENODEV;
1104 if (i == DN_DEV_LIST_SIZE)
1105 return NULL;
1106
1107 *err = -ENOBUFS;
1108 if ((dn_db = kmalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1109 return NULL;
1110
1111 memset(dn_db, 0, sizeof(struct dn_dev));
1112 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1113 smp_wmb();
1114 dev->dn_ptr = dn_db;
1115 dn_db->dev = dev;
1116 init_timer(&dn_db->timer);
1117
1118 dn_db->uptime = jiffies;
1119 if (dn_db->parms.up) {
1120 if (dn_db->parms.up(dev) < 0) {
1121 dev->dn_ptr = NULL;
1122 kfree(dn_db);
1123 return NULL;
1124 }
1125 }
1126
1127 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1128
1129 dn_dev_sysctl_register(dev, &dn_db->parms);
1130
1131 dn_dev_set_timer(dev);
1132
1133 *err = 0;
1134 return dn_db;
1135}
1136
1137
1138/*
1139 * This processes a device up event. We only start up
1140 * the loopback device & ethernet devices with correct
1141 * MAC addreses automatically. Others must be started
1142 * specifically.
1143 *
1144 * FIXME: How should we configure the loopback address ? If we could dispense
1145 * with using decnet_address here and for autobind, it will be one less thing
1146 * for users to worry about setting up.
1147 */
1148
1149void dn_dev_up(struct net_device *dev)
1150{
1151 struct dn_ifaddr *ifa;
1152 dn_address addr = decnet_address;
1153 int maybe_default = 0;
1154 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1155
1156 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1157 return;
1158
1159 /*
1160 * Need to ensure that loopback device has a dn_db attached to it
1161 * to allow creation of neighbours against it, even though it might
1162 * not have a local address of its own. Might as well do the same for
1163 * all autoconfigured interfaces.
1164 */
1165 if (dn_db == NULL) {
1166 int err;
1167 dn_db = dn_dev_create(dev, &err);
1168 if (dn_db == NULL)
1169 return;
1170 }
1171
1172 if (dev->type == ARPHRD_ETHER) {
1173 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1174 return;
1175 addr = dn_htons(dn_eth2dn(dev->dev_addr));
1176 maybe_default = 1;
1177 }
1178
1179 if (addr == 0)
1180 return;
1181
1182 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1183 return;
1184
1185 ifa->ifa_local = ifa->ifa_address = addr;
1186 ifa->ifa_flags = 0;
1187 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1188 strcpy(ifa->ifa_label, dev->name);
1189
1190 dn_dev_set_ifa(dev, ifa);
1191
1192 /*
1193 * Automagically set the default device to the first automatically
1194 * configured ethernet card in the system.
1195 */
1196 if (maybe_default) {
1197 dev_hold(dev);
1198 if (dn_dev_set_default(dev, 0))
1199 dev_put(dev);
1200 }
1201}
1202
1203static void dn_dev_delete(struct net_device *dev)
1204{
1205 struct dn_dev *dn_db = dev->dn_ptr;
1206
1207 if (dn_db == NULL)
1208 return;
1209
1210 del_timer_sync(&dn_db->timer);
1211 dn_dev_sysctl_unregister(&dn_db->parms);
1212 dn_dev_check_default(dev);
1213 neigh_ifdown(&dn_neigh_table, dev);
1214
1215 if (dn_db->parms.down)
1216 dn_db->parms.down(dev);
1217
1218 dev->dn_ptr = NULL;
1219
1220 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1221 neigh_ifdown(&dn_neigh_table, dev);
1222
1223 if (dn_db->router)
1224 neigh_release(dn_db->router);
1225 if (dn_db->peer)
1226 neigh_release(dn_db->peer);
1227
1228 kfree(dn_db);
1229}
1230
1231void dn_dev_down(struct net_device *dev)
1232{
1233 struct dn_dev *dn_db = dev->dn_ptr;
1234 struct dn_ifaddr *ifa;
1235
1236 if (dn_db == NULL)
1237 return;
1238
1239 while((ifa = dn_db->ifa_list) != NULL) {
1240 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1241 dn_dev_free_ifa(ifa);
1242 }
1243
1244 dn_dev_delete(dev);
1245}
1246
1247void dn_dev_init_pkt(struct sk_buff *skb)
1248{
1249 return;
1250}
1251
1252void dn_dev_veri_pkt(struct sk_buff *skb)
1253{
1254 return;
1255}
1256
1257void dn_dev_hello(struct sk_buff *skb)
1258{
1259 return;
1260}
1261
1262void dn_dev_devices_off(void)
1263{
1264 struct net_device *dev;
1265
1266 rtnl_lock();
1267 for(dev = dev_base; dev; dev = dev->next)
1268 dn_dev_down(dev);
1269 rtnl_unlock();
1270
1271}
1272
1273void dn_dev_devices_on(void)
1274{
1275 struct net_device *dev;
1276
1277 rtnl_lock();
1278 for(dev = dev_base; dev; dev = dev->next) {
1279 if (dev->flags & IFF_UP)
1280 dn_dev_up(dev);
1281 }
1282 rtnl_unlock();
1283}
1284
1285int register_dnaddr_notifier(struct notifier_block *nb)
1286{
1287 return notifier_chain_register(&dnaddr_chain, nb);
1288}
1289
1290int unregister_dnaddr_notifier(struct notifier_block *nb)
1291{
1292 return notifier_chain_unregister(&dnaddr_chain, nb);
1293}
1294
1295#ifdef CONFIG_PROC_FS
1296static inline struct net_device *dn_dev_get_next(struct seq_file *seq, struct net_device *dev)
1297{
1298 do {
1299 dev = dev->next;
1300 } while(dev && !dev->dn_ptr);
1301
1302 return dev;
1303}
1304
1305static struct net_device *dn_dev_get_idx(struct seq_file *seq, loff_t pos)
1306{
1307 struct net_device *dev;
1308
1309 dev = dev_base;
1310 if (dev && !dev->dn_ptr)
1311 dev = dn_dev_get_next(seq, dev);
1312 if (pos) {
1313 while(dev && (dev = dn_dev_get_next(seq, dev)))
1314 --pos;
1315 }
1316 return dev;
1317}
1318
1319static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
1320{
1321 if (*pos) {
1322 struct net_device *dev;
1323 read_lock(&dev_base_lock);
1324 dev = dn_dev_get_idx(seq, *pos - 1);
1325 if (dev == NULL)
1326 read_unlock(&dev_base_lock);
1327 return dev;
1328 }
1329 return SEQ_START_TOKEN;
1330}
1331
1332static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1333{
1334 struct net_device *dev = v;
1335 loff_t one = 1;
1336
1337 if (v == SEQ_START_TOKEN) {
1338 dev = dn_dev_seq_start(seq, &one);
1339 } else {
1340 dev = dn_dev_get_next(seq, dev);
1341 if (dev == NULL)
1342 read_unlock(&dev_base_lock);
1343 }
1344 ++*pos;
1345 return dev;
1346}
1347
1348static void dn_dev_seq_stop(struct seq_file *seq, void *v)
1349{
1350 if (v && v != SEQ_START_TOKEN)
1351 read_unlock(&dev_base_lock);
1352}
1353
1354static char *dn_type2asc(char type)
1355{
1356 switch(type) {
1357 case DN_DEV_BCAST:
1358 return "B";
1359 case DN_DEV_UCAST:
1360 return "U";
1361 case DN_DEV_MPOINT:
1362 return "M";
1363 }
1364
1365 return "?";
1366}
1367
1368static int dn_dev_seq_show(struct seq_file *seq, void *v)
1369{
1370 if (v == SEQ_START_TOKEN)
1371 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1372 else {
1373 struct net_device *dev = v;
1374 char peer_buf[DN_ASCBUF_LEN];
1375 char router_buf[DN_ASCBUF_LEN];
1376 struct dn_dev *dn_db = dev->dn_ptr;
1377
1378 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1379 " %04hu %03d %02x %-10s %-7s %-7s\n",
1380 dev->name ? dev->name : "???",
1381 dn_type2asc(dn_db->parms.mode),
1382 0, 0,
1383 dn_db->t3, dn_db->parms.t3,
1384 mtu2blksize(dev),
1385 dn_db->parms.priority,
1386 dn_db->parms.state, dn_db->parms.name,
1387 dn_db->router ? dn_addr2asc(dn_ntohs(*(dn_address *)dn_db->router->primary_key), router_buf) : "",
1388 dn_db->peer ? dn_addr2asc(dn_ntohs(*(dn_address *)dn_db->peer->primary_key), peer_buf) : "");
1389 }
1390 return 0;
1391}
1392
1393static struct seq_operations dn_dev_seq_ops = {
1394 .start = dn_dev_seq_start,
1395 .next = dn_dev_seq_next,
1396 .stop = dn_dev_seq_stop,
1397 .show = dn_dev_seq_show,
1398};
1399
1400static int dn_dev_seq_open(struct inode *inode, struct file *file)
1401{
1402 return seq_open(file, &dn_dev_seq_ops);
1403}
1404
1405static struct file_operations dn_dev_seq_fops = {
1406 .owner = THIS_MODULE,
1407 .open = dn_dev_seq_open,
1408 .read = seq_read,
1409 .llseek = seq_lseek,
1410 .release = seq_release,
1411};
1412
1413#endif /* CONFIG_PROC_FS */
1414
db46edc6 1415static struct rtnetlink_link dnet_rtnetlink_table[RTM_NR_MSGTYPES] =
1da177e4 1416{
db46edc6
TG		 1417 [RTM_NEWADDR - RTM_BASE] = { .doit = dn_dev_rtm_newaddr, },
1418 [RTM_DELADDR - RTM_BASE] = { .doit = dn_dev_rtm_deladdr, },
1419 [RTM_GETADDR - RTM_BASE] = { .dumpit = dn_dev_dump_ifaddr, },
1da177e4 1420#ifdef CONFIG_DECNET_ROUTER
db46edc6
TG		 1421 [RTM_NEWROUTE - RTM_BASE] = { .doit = dn_fib_rtm_newroute, },
1422 [RTM_DELROUTE - RTM_BASE] = { .doit = dn_fib_rtm_delroute, },
1423 [RTM_GETROUTE - RTM_BASE] = { .doit = dn_cache_getroute,
1424 .dumpit = dn_fib_dump, },
1425 [RTM_NEWRULE - RTM_BASE] = { .doit = dn_fib_rtm_newrule, },
1426 [RTM_DELRULE - RTM_BASE] = { .doit = dn_fib_rtm_delrule, },
1427 [RTM_GETRULE - RTM_BASE] = { .dumpit = dn_fib_dump_rules, },
1da177e4 1428#else
db46edc6 1429 [RTM_GETROUTE - RTM_BASE] = { .doit = dn_cache_getroute,
25ae3f59 1430 .dumpit = dn_cache_dump, },
1da177e4
LT		 1431#endif
1432
1433};
1434
1435static int __initdata addr[2];
1436module_param_array(addr, int, NULL, 0444);
1437MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1438
1439void __init dn_dev_init(void)
1440{
1441 if (addr[0] > 63 || addr[0] < 0) {
1442 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1443 return;
1444 }
1445
1446 if (addr[1] > 1023 || addr[1] < 0) {
1447 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1448 return;
1449 }
1450
1451 decnet_address = dn_htons((addr[0] << 10) | addr[1]);
1452
1453 dn_dev_devices_on();
1454
1455 rtnetlink_links[PF_DECnet] = dnet_rtnetlink_table;
1456
1457 proc_net_fops_create("decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1458
1459#ifdef CONFIG_SYSCTL
1460 {
1461 int i;
1462 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1463 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1464 }
1465#endif /* CONFIG_SYSCTL */
1466}
1467
1468void __exit dn_dev_cleanup(void)
1469{
1470 rtnetlink_links[PF_DECnet] = NULL;
1471
1472#ifdef CONFIG_SYSCTL
1473 {
1474 int i;
1475 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1476 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1477 }
1478#endif /* CONFIG_SYSCTL */
1479
1480 proc_net_remove("decnet_dev");
1481
1482 dn_dev_devices_off();
1483}
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