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27#include <linux/capability.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_addr.h>
38#include <linux/if_arp.h>
39#include <linux/if_ether.h>
40#include <linux/skbuff.h>
41#include <linux/sysctl.h>
42#include <linux/notifier.h>
43#include <asm/uaccess.h>
44#include <asm/system.h>
45#include <net/net_namespace.h>
46#include <net/neighbour.h>
47#include <net/dst.h>
48#include <net/flow.h>
49#include <net/fib_rules.h>
50#include <net/netlink.h>
51#include <net/dn.h>
52#include <net/dn_dev.h>
53#include <net/dn_route.h>
54#include <net/dn_neigh.h>
55#include <net/dn_fib.h>
56
57#define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
58
59static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
60static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
61static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
62static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
63
64extern struct neigh_table dn_neigh_table;
65
66
67
68
69__le16 decnet_address = 0;
70
71static DEFINE_SPINLOCK(dndev_lock);
72static struct net_device *decnet_default_device;
73static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
74
75static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
76static void dn_dev_delete(struct net_device *dev);
77static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);
78
79static int dn_eth_up(struct net_device *);
80static void dn_eth_down(struct net_device *);
81static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
82static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
83
84static struct dn_dev_parms dn_dev_list[] = {
85{
86 .type = ARPHRD_ETHER,
87 .mode = DN_DEV_BCAST,
88 .state = DN_DEV_S_RU,
89 .t2 = 1,
90 .t3 = 10,
91 .name = "ethernet",
92 .up = dn_eth_up,
93 .down = dn_eth_down,
94 .timer3 = dn_send_brd_hello,
95},
96{
97 .type = ARPHRD_IPGRE,
98 .mode = DN_DEV_BCAST,
99 .state = DN_DEV_S_RU,
100 .t2 = 1,
101 .t3 = 10,
102 .name = "ipgre",
103 .timer3 = dn_send_brd_hello,
104},
105#if 0
106{
107 .type = ARPHRD_X25,
108 .mode = DN_DEV_UCAST,
109 .state = DN_DEV_S_DS,
110 .t2 = 1,
111 .t3 = 120,
112 .name = "x25",
113 .timer3 = dn_send_ptp_hello,
114},
115#endif
116#if 0
117{
118 .type = ARPHRD_PPP,
119 .mode = DN_DEV_BCAST,
120 .state = DN_DEV_S_RU,
121 .t2 = 1,
122 .t3 = 10,
123 .name = "ppp",
124 .timer3 = dn_send_brd_hello,
125},
126#endif
127{
128 .type = ARPHRD_DDCMP,
129 .mode = DN_DEV_UCAST,
130 .state = DN_DEV_S_DS,
131 .t2 = 1,
132 .t3 = 120,
133 .name = "ddcmp",
134 .timer3 = dn_send_ptp_hello,
135},
136{
137 .type = ARPHRD_LOOPBACK,
138 .mode = DN_DEV_BCAST,
139 .state = DN_DEV_S_RU,
140 .t2 = 1,
141 .t3 = 10,
142 .name = "loopback",
143 .timer3 = dn_send_brd_hello,
144}
145};
146
147#define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)
148
149#define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x)
150
151#ifdef CONFIG_SYSCTL
152
153static int min_t2[] = { 1 };
154static int max_t2[] = { 60 };
155static int min_t3[] = { 1 };
156static int max_t3[] = { 8191 };
157
158static int min_priority[1];
159static int max_priority[] = { 127 };
160
161static int dn_forwarding_proc(ctl_table *, int,
162 void __user *, size_t *, loff_t *);
163static struct dn_dev_sysctl_table {
164 struct ctl_table_header *sysctl_header;
165 ctl_table dn_dev_vars[5];
166} dn_dev_sysctl = {
167 NULL,
168 {
169 {
170 .procname = "forwarding",
171 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
172 .maxlen = sizeof(int),
173 .mode = 0644,
174 .proc_handler = dn_forwarding_proc,
175 },
176 {
177 .procname = "priority",
178 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
179 .maxlen = sizeof(int),
180 .mode = 0644,
181 .proc_handler = proc_dointvec_minmax,
182 .extra1 = &min_priority,
183 .extra2 = &max_priority
184 },
185 {
186 .procname = "t2",
187 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
188 .maxlen = sizeof(int),
189 .mode = 0644,
190 .proc_handler = proc_dointvec_minmax,
191 .extra1 = &min_t2,
192 .extra2 = &max_t2
193 },
194 {
195 .procname = "t3",
196 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
197 .maxlen = sizeof(int),
198 .mode = 0644,
199 .proc_handler = proc_dointvec_minmax,
200 .extra1 = &min_t3,
201 .extra2 = &max_t3
202 },
203 {0}
204 },
205};
206
207static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
208{
209 struct dn_dev_sysctl_table *t;
210 int i;
211
212#define DN_CTL_PATH_DEV 3
213
214 struct ctl_path dn_ctl_path[] = {
215 { .procname = "net", },
216 { .procname = "decnet", },
217 { .procname = "conf", },
218 { },
219 { },
220 };
221
222 t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
223 if (t == NULL)
224 return;
225
226 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
227 long offset = (long)t->dn_dev_vars[i].data;
228 t->dn_dev_vars[i].data = ((char *)parms) + offset;
229 }
230
231 if (dev) {
232 dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name;
233 } else {
234 dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name;
235 }
236
237 t->dn_dev_vars[0].extra1 = (void *)dev;
238
239 t->sysctl_header = register_sysctl_paths(dn_ctl_path, t->dn_dev_vars);
240 if (t->sysctl_header == NULL)
241 kfree(t);
242 else
243 parms->sysctl = t;
244}
245
246static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
247{
248 if (parms->sysctl) {
249 struct dn_dev_sysctl_table *t = parms->sysctl;
250 parms->sysctl = NULL;
251 unregister_sysctl_table(t->sysctl_header);
252 kfree(t);
253 }
254}
255
256static int dn_forwarding_proc(ctl_table *table, int write,
257 void __user *buffer,
258 size_t *lenp, loff_t *ppos)
259{
260#ifdef CONFIG_DECNET_ROUTER
261 struct net_device *dev = table->extra1;
262 struct dn_dev *dn_db;
263 int err;
264 int tmp, old;
265
266 if (table->extra1 == NULL)
267 return -EINVAL;
268
269 dn_db = dev->dn_ptr;
270 old = dn_db->parms.forwarding;
271
272 err = proc_dointvec(table, write, buffer, lenp, ppos);
273
274 if ((err >= 0) && write) {
275 if (dn_db->parms.forwarding < 0)
276 dn_db->parms.forwarding = 0;
277 if (dn_db->parms.forwarding > 2)
278 dn_db->parms.forwarding = 2;
279
280
281
282
283
284
285 tmp = dn_db->parms.forwarding;
286 dn_db->parms.forwarding = old;
287 if (dn_db->parms.down)
288 dn_db->parms.down(dev);
289 dn_db->parms.forwarding = tmp;
290 if (dn_db->parms.up)
291 dn_db->parms.up(dev);
292 }
293
294 return err;
295#else
296 return -EINVAL;
297#endif
298}
299
300#else
301static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
302{
303}
304static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
305{
306}
307
308#endif
309
310static inline __u16 mtu2blksize(struct net_device *dev)
311{
312 u32 blksize = dev->mtu;
313 if (blksize > 0xffff)
314 blksize = 0xffff;
315
316 if (dev->type == ARPHRD_ETHER ||
317 dev->type == ARPHRD_PPP ||
318 dev->type == ARPHRD_IPGRE ||
319 dev->type == ARPHRD_LOOPBACK)
320 blksize -= 2;
321
322 return (__u16)blksize;
323}
324
325static struct dn_ifaddr *dn_dev_alloc_ifa(void)
326{
327 struct dn_ifaddr *ifa;
328
329 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
330
331 return ifa;
332}
333
334static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
335{
336 kfree(ifa);
337}
338
339static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
340{
341 struct dn_ifaddr *ifa1 = *ifap;
342 unsigned char mac_addr[6];
343 struct net_device *dev = dn_db->dev;
344
345 ASSERT_RTNL();
346
347 *ifap = ifa1->ifa_next;
348
349 if (dn_db->dev->type == ARPHRD_ETHER) {
350 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
351 dn_dn2eth(mac_addr, ifa1->ifa_local);
352 dev_mc_delete(dev, mac_addr, ETH_ALEN, 0);
353 }
354 }
355
356 dn_ifaddr_notify(RTM_DELADDR, ifa1);
357 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
358 if (destroy) {
359 dn_dev_free_ifa(ifa1);
360
361 if (dn_db->ifa_list == NULL)
362 dn_dev_delete(dn_db->dev);
363 }
364}
365
366static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
367{
368 struct net_device *dev = dn_db->dev;
369 struct dn_ifaddr *ifa1;
370 unsigned char mac_addr[6];
371
372 ASSERT_RTNL();
373
374
375 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
376 if (ifa1->ifa_local == ifa->ifa_local)
377 return -EEXIST;
378 }
379
380 if (dev->type == ARPHRD_ETHER) {
381 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
382 dn_dn2eth(mac_addr, ifa->ifa_local);
383 dev_mc_add(dev, mac_addr, ETH_ALEN, 0);
384 }
385 }
386
387 ifa->ifa_next = dn_db->ifa_list;
388 dn_db->ifa_list = ifa;
389
390 dn_ifaddr_notify(RTM_NEWADDR, ifa);
391 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
392
393 return 0;
394}
395
396static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
397{
398 struct dn_dev *dn_db = dev->dn_ptr;
399 int rv;
400
401 if (dn_db == NULL) {
402 int err;
403 dn_db = dn_dev_create(dev, &err);
404 if (dn_db == NULL)
405 return err;
406 }
407
408 ifa->ifa_dev = dn_db;
409
410 if (dev->flags & IFF_LOOPBACK)
411 ifa->ifa_scope = RT_SCOPE_HOST;
412
413 rv = dn_dev_insert_ifa(dn_db, ifa);
414 if (rv)
415 dn_dev_free_ifa(ifa);
416 return rv;
417}
418
419
420int dn_dev_ioctl(unsigned int cmd, void __user *arg)
421{
422 char buffer[DN_IFREQ_SIZE];
423 struct ifreq *ifr = (struct ifreq *)buffer;
424 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
425 struct dn_dev *dn_db;
426 struct net_device *dev;
427 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
428 int ret = 0;
429
430 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
431 return -EFAULT;
432 ifr->ifr_name[IFNAMSIZ-1] = 0;
433
434 dev_load(&init_net, ifr->ifr_name);
435
436 switch(cmd) {
437 case SIOCGIFADDR:
438 break;
439 case SIOCSIFADDR:
440 if (!capable(CAP_NET_ADMIN))
441 return -EACCES;
442 if (sdn->sdn_family != AF_DECnet)
443 return -EINVAL;
444 break;
445 default:
446 return -EINVAL;
447 }
448
449 rtnl_lock();
450
451 if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
452 ret = -ENODEV;
453 goto done;
454 }
455
456 if ((dn_db = dev->dn_ptr) != NULL) {
457 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
458 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
459 break;
460 }
461
462 if (ifa == NULL && cmd != SIOCSIFADDR) {
463 ret = -EADDRNOTAVAIL;
464 goto done;
465 }
466
467 switch(cmd) {
468 case SIOCGIFADDR:
469 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
470 goto rarok;
471
472 case SIOCSIFADDR:
473 if (!ifa) {
474 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
475 ret = -ENOBUFS;
476 break;
477 }
478 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
479 } else {
480 if (ifa->ifa_local == dn_saddr2dn(sdn))
481 break;
482 dn_dev_del_ifa(dn_db, ifap, 0);
483 }
484
485 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
486
487 ret = dn_dev_set_ifa(dev, ifa);
488 }
489done:
490 rtnl_unlock();
491
492 return ret;
493rarok:
494 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
495 ret = -EFAULT;
496 goto done;
497}
498
499struct net_device *dn_dev_get_default(void)
500{
501 struct net_device *dev;
502
503 spin_lock(&dndev_lock);
504 dev = decnet_default_device;
505 if (dev) {
506 if (dev->dn_ptr)
507 dev_hold(dev);
508 else
509 dev = NULL;
510 }
511 spin_unlock(&dndev_lock);
512
513 return dev;
514}
515
516int dn_dev_set_default(struct net_device *dev, int force)
517{
518 struct net_device *old = NULL;
519 int rv = -EBUSY;
520 if (!dev->dn_ptr)
521 return -ENODEV;
522
523 spin_lock(&dndev_lock);
524 if (force || decnet_default_device == NULL) {
525 old = decnet_default_device;
526 decnet_default_device = dev;
527 rv = 0;
528 }
529 spin_unlock(&dndev_lock);
530
531 if (old)
532 dev_put(old);
533 return rv;
534}
535
536static void dn_dev_check_default(struct net_device *dev)
537{
538 spin_lock(&dndev_lock);
539 if (dev == decnet_default_device) {
540 decnet_default_device = NULL;
541 } else {
542 dev = NULL;
543 }
544 spin_unlock(&dndev_lock);
545
546 if (dev)
547 dev_put(dev);
548}
549
550
551
552
553static struct dn_dev *dn_dev_by_index(int ifindex)
554{
555 struct net_device *dev;
556 struct dn_dev *dn_dev = NULL;
557
558 dev = __dev_get_by_index(&init_net, ifindex);
559 if (dev)
560 dn_dev = dev->dn_ptr;
561
562 return dn_dev;
563}
564
565static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
566 [IFA_ADDRESS] = { .type = NLA_U16 },
567 [IFA_LOCAL] = { .type = NLA_U16 },
568 [IFA_LABEL] = { .type = NLA_STRING,
569 .len = IFNAMSIZ - 1 },
570};
571
572static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
573{
574 struct net *net = sock_net(skb->sk);
575 struct nlattr *tb[IFA_MAX+1];
576 struct dn_dev *dn_db;
577 struct ifaddrmsg *ifm;
578 struct dn_ifaddr *ifa, **ifap;
579 int err = -EINVAL;
580
581 if (!net_eq(net, &init_net))
582 goto errout;
583
584 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
585 if (err < 0)
586 goto errout;
587
588 err = -ENODEV;
589 ifm = nlmsg_data(nlh);
590 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
591 goto errout;
592
593 err = -EADDRNOTAVAIL;
594 for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) {
595 if (tb[IFA_LOCAL] &&
596 nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
597 continue;
598
599 if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
600 continue;
601
602 dn_dev_del_ifa(dn_db, ifap, 1);
603 return 0;
604 }
605
606errout:
607 return err;
608}
609
610static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
611{
612 struct net *net = sock_net(skb->sk);
613 struct nlattr *tb[IFA_MAX+1];
614 struct net_device *dev;
615 struct dn_dev *dn_db;
616 struct ifaddrmsg *ifm;
617 struct dn_ifaddr *ifa;
618 int err;
619
620 if (!net_eq(net, &init_net))
621 return -EINVAL;
622
623 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
624 if (err < 0)
625 return err;
626
627 if (tb[IFA_LOCAL] == NULL)
628 return -EINVAL;
629
630 ifm = nlmsg_data(nlh);
631 if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
632 return -ENODEV;
633
634 if ((dn_db = dev->dn_ptr) == NULL) {
635 dn_db = dn_dev_create(dev, &err);
636 if (!dn_db)
637 return err;
638 }
639
640 if ((ifa = dn_dev_alloc_ifa()) == NULL)
641 return -ENOBUFS;
642
643 if (tb[IFA_ADDRESS] == NULL)
644 tb[IFA_ADDRESS] = tb[IFA_LOCAL];
645
646 ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
647 ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
648 ifa->ifa_flags = ifm->ifa_flags;
649 ifa->ifa_scope = ifm->ifa_scope;
650 ifa->ifa_dev = dn_db;
651
652 if (tb[IFA_LABEL])
653 nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
654 else
655 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
656
657 err = dn_dev_insert_ifa(dn_db, ifa);
658 if (err)
659 dn_dev_free_ifa(ifa);
660
661 return err;
662}
663
664static inline size_t dn_ifaddr_nlmsg_size(void)
665{
666 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
667 + nla_total_size(IFNAMSIZ)
668 + nla_total_size(2)
669 + nla_total_size(2);
670}
671
672static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
673 u32 pid, u32 seq, int event, unsigned int flags)
674{
675 struct ifaddrmsg *ifm;
676 struct nlmsghdr *nlh;
677
678 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags);
679 if (nlh == NULL)
680 return -EMSGSIZE;
681
682 ifm = nlmsg_data(nlh);
683 ifm->ifa_family = AF_DECnet;
684 ifm->ifa_prefixlen = 16;
685 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
686 ifm->ifa_scope = ifa->ifa_scope;
687 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
688
689 if (ifa->ifa_address)
690 NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address);
691 if (ifa->ifa_local)
692 NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
693 if (ifa->ifa_label[0])
694 NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);
695
696 return nlmsg_end(skb, nlh);
697
698nla_put_failure:
699 nlmsg_cancel(skb, nlh);
700 return -EMSGSIZE;
701}
702
703static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
704{
705 struct sk_buff *skb;
706 int err = -ENOBUFS;
707
708 skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
709 if (skb == NULL)
710 goto errout;
711
712 err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
713 if (err < 0) {
714
715 WARN_ON(err == -EMSGSIZE);
716 kfree_skb(skb);
717 goto errout;
718 }
719 rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
720 return;
721errout:
722 if (err < 0)
723 rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
724}
725
726static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
727{
728 struct net *net = sock_net(skb->sk);
729 int idx, dn_idx = 0, skip_ndevs, skip_naddr;
730 struct net_device *dev;
731 struct dn_dev *dn_db;
732 struct dn_ifaddr *ifa;
733
734 if (!net_eq(net, &init_net))
735 return 0;
736
737 skip_ndevs = cb->args[0];
738 skip_naddr = cb->args[1];
739
740 idx = 0;
741 for_each_netdev(&init_net, dev) {
742 if (idx < skip_ndevs)
743 goto cont;
744 else if (idx > skip_ndevs) {
745
746
747 skip_naddr = 0;
748 }
749
750 if ((dn_db = dev->dn_ptr) == NULL)
751 goto cont;
752
753 for (ifa = dn_db->ifa_list, dn_idx = 0; ifa;
754 ifa = ifa->ifa_next, dn_idx++) {
755 if (dn_idx < skip_naddr)
756 continue;
757
758 if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
759 cb->nlh->nlmsg_seq, RTM_NEWADDR,
760 NLM_F_MULTI) < 0)
761 goto done;
762 }
763cont:
764 idx++;
765 }
766done:
767 cb->args[0] = idx;
768 cb->args[1] = dn_idx;
769
770 return skb->len;
771}
772
773static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
774{
775 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
776 struct dn_ifaddr *ifa;
777 int rv = -ENODEV;
778
779 if (dn_db == NULL)
780 goto out;
781
782 rtnl_lock();
783 ifa = dn_db->ifa_list;
784 if (ifa != NULL) {
785 *addr = ifa->ifa_local;
786 rv = 0;
787 }
788 rtnl_unlock();
789out:
790 return rv;
791}
792
793
794
795
796
797
798
799
800
801
802
803int dn_dev_bind_default(__le16 *addr)
804{
805 struct net_device *dev;
806 int rv;
807 dev = dn_dev_get_default();
808last_chance:
809 if (dev) {
810 rv = dn_dev_get_first(dev, addr);
811 dev_put(dev);
812 if (rv == 0 || dev == init_net.loopback_dev)
813 return rv;
814 }
815 dev = init_net.loopback_dev;
816 dev_hold(dev);
817 goto last_chance;
818}
819
820static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
821{
822 struct endnode_hello_message *msg;
823 struct sk_buff *skb = NULL;
824 __le16 *pktlen;
825 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
826
827 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
828 return;
829
830 skb->dev = dev;
831
832 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
833
834 msg->msgflg = 0x0D;
835 memcpy(msg->tiver, dn_eco_version, 3);
836 dn_dn2eth(msg->id, ifa->ifa_local);
837 msg->iinfo = DN_RT_INFO_ENDN;
838 msg->blksize = cpu_to_le16(mtu2blksize(dev));
839 msg->area = 0x00;
840 memset(msg->seed, 0, 8);
841 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
842
843 if (dn_db->router) {
844 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
845 dn_dn2eth(msg->neighbor, dn->addr);
846 }
847
848 msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3);
849 msg->mpd = 0x00;
850 msg->datalen = 0x02;
851 memset(msg->data, 0xAA, 2);
852
853 pktlen = (__le16 *)skb_push(skb,2);
854 *pktlen = cpu_to_le16(skb->len - 2);
855
856 skb_reset_network_header(skb);
857
858 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
859}
860
861
862#define DRDELAY (5 * HZ)
863
864static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
865{
866
867 if ((jiffies - dn_db->uptime) < DRDELAY)
868 return 0;
869
870
871 if (!dn_db->router)
872 return 1;
873
874
875 if (dn->priority < dn_db->parms.priority)
876 return 1;
877
878
879 if (dn->priority != dn_db->parms.priority)
880 return 0;
881
882 if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local))
883 return 1;
884
885 return 0;
886}
887
888static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
889{
890 int n;
891 struct dn_dev *dn_db = dev->dn_ptr;
892 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
893 struct sk_buff *skb;
894 size_t size;
895 unsigned char *ptr;
896 unsigned char *i1, *i2;
897 __le16 *pktlen;
898 char *src;
899
900 if (mtu2blksize(dev) < (26 + 7))
901 return;
902
903 n = mtu2blksize(dev) - 26;
904 n /= 7;
905
906 if (n > 32)
907 n = 32;
908
909 size = 2 + 26 + 7 * n;
910
911 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
912 return;
913
914 skb->dev = dev;
915 ptr = skb_put(skb, size);
916
917 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
918 *ptr++ = 2;
919 *ptr++ = 0;
920 *ptr++ = 0;
921 dn_dn2eth(ptr, ifa->ifa_local);
922 src = ptr;
923 ptr += ETH_ALEN;
924 *ptr++ = dn_db->parms.forwarding == 1 ?
925 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
926 *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev));
927 ptr += 2;
928 *ptr++ = dn_db->parms.priority;
929 *ptr++ = 0;
930 *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3);
931 ptr += 2;
932 *ptr++ = 0;
933 i1 = ptr++;
934 memset(ptr, 0, 7);
935 ptr += 7;
936 i2 = ptr++;
937
938 n = dn_neigh_elist(dev, ptr, n);
939
940 *i2 = 7 * n;
941 *i1 = 8 + *i2;
942
943 skb_trim(skb, (27 + *i2));
944
945 pktlen = (__le16 *)skb_push(skb, 2);
946 *pktlen = cpu_to_le16(skb->len - 2);
947
948 skb_reset_network_header(skb);
949
950 if (dn_am_i_a_router(dn, dn_db, ifa)) {
951 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
952 if (skb2) {
953 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
954 }
955 }
956
957 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
958}
959
960static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
961{
962 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
963
964 if (dn_db->parms.forwarding == 0)
965 dn_send_endnode_hello(dev, ifa);
966 else
967 dn_send_router_hello(dev, ifa);
968}
969
970static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
971{
972 int tdlen = 16;
973 int size = dev->hard_header_len + 2 + 4 + tdlen;
974 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
975 int i;
976 unsigned char *ptr;
977 char src[ETH_ALEN];
978
979 if (skb == NULL)
980 return ;
981
982 skb->dev = dev;
983 skb_push(skb, dev->hard_header_len);
984 ptr = skb_put(skb, 2 + 4 + tdlen);
985
986 *ptr++ = DN_RT_PKT_HELO;
987 *((__le16 *)ptr) = ifa->ifa_local;
988 ptr += 2;
989 *ptr++ = tdlen;
990
991 for(i = 0; i < tdlen; i++)
992 *ptr++ = 0252;
993
994 dn_dn2eth(src, ifa->ifa_local);
995 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
996}
997
998static int dn_eth_up(struct net_device *dev)
999{
1000 struct dn_dev *dn_db = dev->dn_ptr;
1001
1002 if (dn_db->parms.forwarding == 0)
1003 dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1004 else
1005 dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1006
1007 dn_db->use_long = 1;
1008
1009 return 0;
1010}
1011
1012static void dn_eth_down(struct net_device *dev)
1013{
1014 struct dn_dev *dn_db = dev->dn_ptr;
1015
1016 if (dn_db->parms.forwarding == 0)
1017 dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1018 else
1019 dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1020}
1021
1022static void dn_dev_set_timer(struct net_device *dev);
1023
1024static void dn_dev_timer_func(unsigned long arg)
1025{
1026 struct net_device *dev = (struct net_device *)arg;
1027 struct dn_dev *dn_db = dev->dn_ptr;
1028 struct dn_ifaddr *ifa;
1029
1030 if (dn_db->t3 <= dn_db->parms.t2) {
1031 if (dn_db->parms.timer3) {
1032 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1033 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1034 dn_db->parms.timer3(dev, ifa);
1035 }
1036 }
1037 dn_db->t3 = dn_db->parms.t3;
1038 } else {
1039 dn_db->t3 -= dn_db->parms.t2;
1040 }
1041
1042 dn_dev_set_timer(dev);
1043}
1044
1045static void dn_dev_set_timer(struct net_device *dev)
1046{
1047 struct dn_dev *dn_db = dev->dn_ptr;
1048
1049 if (dn_db->parms.t2 > dn_db->parms.t3)
1050 dn_db->parms.t2 = dn_db->parms.t3;
1051
1052 dn_db->timer.data = (unsigned long)dev;
1053 dn_db->timer.function = dn_dev_timer_func;
1054 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1055
1056 add_timer(&dn_db->timer);
1057}
1058
1059static struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1060{
1061 int i;
1062 struct dn_dev_parms *p = dn_dev_list;
1063 struct dn_dev *dn_db;
1064
1065 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1066 if (p->type == dev->type)
1067 break;
1068 }
1069
1070 *err = -ENODEV;
1071 if (i == DN_DEV_LIST_SIZE)
1072 return NULL;
1073
1074 *err = -ENOBUFS;
1075 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1076 return NULL;
1077
1078 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1079 smp_wmb();
1080 dev->dn_ptr = dn_db;
1081 dn_db->dev = dev;
1082 init_timer(&dn_db->timer);
1083
1084 dn_db->uptime = jiffies;
1085
1086 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1087 if (!dn_db->neigh_parms) {
1088 dev->dn_ptr = NULL;
1089 kfree(dn_db);
1090 return NULL;
1091 }
1092
1093 if (dn_db->parms.up) {
1094 if (dn_db->parms.up(dev) < 0) {
1095 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1096 dev->dn_ptr = NULL;
1097 kfree(dn_db);
1098 return NULL;
1099 }
1100 }
1101
1102 dn_dev_sysctl_register(dev, &dn_db->parms);
1103
1104 dn_dev_set_timer(dev);
1105
1106 *err = 0;
1107 return dn_db;
1108}
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122void dn_dev_up(struct net_device *dev)
1123{
1124 struct dn_ifaddr *ifa;
1125 __le16 addr = decnet_address;
1126 int maybe_default = 0;
1127 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1128
1129 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1130 return;
1131
1132
1133
1134
1135
1136
1137
1138 if (dn_db == NULL) {
1139 int err;
1140 dn_db = dn_dev_create(dev, &err);
1141 if (dn_db == NULL)
1142 return;
1143 }
1144
1145 if (dev->type == ARPHRD_ETHER) {
1146 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1147 return;
1148 addr = dn_eth2dn(dev->dev_addr);
1149 maybe_default = 1;
1150 }
1151
1152 if (addr == 0)
1153 return;
1154
1155 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1156 return;
1157
1158 ifa->ifa_local = ifa->ifa_address = addr;
1159 ifa->ifa_flags = 0;
1160 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1161 strcpy(ifa->ifa_label, dev->name);
1162
1163 dn_dev_set_ifa(dev, ifa);
1164
1165
1166
1167
1168
1169 if (maybe_default) {
1170 dev_hold(dev);
1171 if (dn_dev_set_default(dev, 0))
1172 dev_put(dev);
1173 }
1174}
1175
1176static void dn_dev_delete(struct net_device *dev)
1177{
1178 struct dn_dev *dn_db = dev->dn_ptr;
1179
1180 if (dn_db == NULL)
1181 return;
1182
1183 del_timer_sync(&dn_db->timer);
1184 dn_dev_sysctl_unregister(&dn_db->parms);
1185 dn_dev_check_default(dev);
1186 neigh_ifdown(&dn_neigh_table, dev);
1187
1188 if (dn_db->parms.down)
1189 dn_db->parms.down(dev);
1190
1191 dev->dn_ptr = NULL;
1192
1193 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1194 neigh_ifdown(&dn_neigh_table, dev);
1195
1196 if (dn_db->router)
1197 neigh_release(dn_db->router);
1198 if (dn_db->peer)
1199 neigh_release(dn_db->peer);
1200
1201 kfree(dn_db);
1202}
1203
1204void dn_dev_down(struct net_device *dev)
1205{
1206 struct dn_dev *dn_db = dev->dn_ptr;
1207 struct dn_ifaddr *ifa;
1208
1209 if (dn_db == NULL)
1210 return;
1211
1212 while((ifa = dn_db->ifa_list) != NULL) {
1213 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1214 dn_dev_free_ifa(ifa);
1215 }
1216
1217 dn_dev_delete(dev);
1218}
1219
1220void dn_dev_init_pkt(struct sk_buff *skb)
1221{
1222 return;
1223}
1224
1225void dn_dev_veri_pkt(struct sk_buff *skb)
1226{
1227 return;
1228}
1229
1230void dn_dev_hello(struct sk_buff *skb)
1231{
1232 return;
1233}
1234
1235void dn_dev_devices_off(void)
1236{
1237 struct net_device *dev;
1238
1239 rtnl_lock();
1240 for_each_netdev(&init_net, dev)
1241 dn_dev_down(dev);
1242 rtnl_unlock();
1243
1244}
1245
1246void dn_dev_devices_on(void)
1247{
1248 struct net_device *dev;
1249
1250 rtnl_lock();
1251 for_each_netdev(&init_net, dev) {
1252 if (dev->flags & IFF_UP)
1253 dn_dev_up(dev);
1254 }
1255 rtnl_unlock();
1256}
1257
1258int register_dnaddr_notifier(struct notifier_block *nb)
1259{
1260 return blocking_notifier_chain_register(&dnaddr_chain, nb);
1261}
1262
1263int unregister_dnaddr_notifier(struct notifier_block *nb)
1264{
1265 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
1266}
1267
1268#ifdef CONFIG_PROC_FS
1269static inline int is_dn_dev(struct net_device *dev)
1270{
1271 return dev->dn_ptr != NULL;
1272}
1273
1274static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
1275 __acquires(rcu)
1276{
1277 int i;
1278 struct net_device *dev;
1279
1280 rcu_read_lock();
1281
1282 if (*pos == 0)
1283 return SEQ_START_TOKEN;
1284
1285 i = 1;
1286 for_each_netdev_rcu(&init_net, dev) {
1287 if (!is_dn_dev(dev))
1288 continue;
1289
1290 if (i++ == *pos)
1291 return dev;
1292 }
1293
1294 return NULL;
1295}
1296
1297static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1298{
1299 struct net_device *dev;
1300
1301 ++*pos;
1302
1303 dev = (struct net_device *)v;
1304 if (v == SEQ_START_TOKEN)
1305 dev = net_device_entry(&init_net.dev_base_head);
1306
1307 for_each_netdev_continue_rcu(&init_net, dev) {
1308 if (!is_dn_dev(dev))
1309 continue;
1310
1311 return dev;
1312 }
1313
1314 return NULL;
1315}
1316
1317static void dn_dev_seq_stop(struct seq_file *seq, void *v)
1318 __releases(rcu)
1319{
1320 rcu_read_unlock();
1321}
1322
1323static char *dn_type2asc(char type)
1324{
1325 switch(type) {
1326 case DN_DEV_BCAST:
1327 return "B";
1328 case DN_DEV_UCAST:
1329 return "U";
1330 case DN_DEV_MPOINT:
1331 return "M";
1332 }
1333
1334 return "?";
1335}
1336
1337static int dn_dev_seq_show(struct seq_file *seq, void *v)
1338{
1339 if (v == SEQ_START_TOKEN)
1340 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1341 else {
1342 struct net_device *dev = v;
1343 char peer_buf[DN_ASCBUF_LEN];
1344 char router_buf[DN_ASCBUF_LEN];
1345 struct dn_dev *dn_db = dev->dn_ptr;
1346
1347 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1348 " %04hu %03d %02x %-10s %-7s %-7s\n",
1349 dev->name ? dev->name : "???",
1350 dn_type2asc(dn_db->parms.mode),
1351 0, 0,
1352 dn_db->t3, dn_db->parms.t3,
1353 mtu2blksize(dev),
1354 dn_db->parms.priority,
1355 dn_db->parms.state, dn_db->parms.name,
1356 dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1357 dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
1358 }
1359 return 0;
1360}
1361
1362static const struct seq_operations dn_dev_seq_ops = {
1363 .start = dn_dev_seq_start,
1364 .next = dn_dev_seq_next,
1365 .stop = dn_dev_seq_stop,
1366 .show = dn_dev_seq_show,
1367};
1368
1369static int dn_dev_seq_open(struct inode *inode, struct file *file)
1370{
1371 return seq_open(file, &dn_dev_seq_ops);
1372}
1373
1374static const struct file_operations dn_dev_seq_fops = {
1375 .owner = THIS_MODULE,
1376 .open = dn_dev_seq_open,
1377 .read = seq_read,
1378 .llseek = seq_lseek,
1379 .release = seq_release,
1380};
1381
1382#endif
1383
1384static int addr[2];
1385module_param_array(addr, int, NULL, 0444);
1386MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1387
1388void __init dn_dev_init(void)
1389{
1390 if (addr[0] > 63 || addr[0] < 0) {
1391 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1392 return;
1393 }
1394
1395 if (addr[1] > 1023 || addr[1] < 0) {
1396 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1397 return;
1398 }
1399
1400 decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]);
1401
1402 dn_dev_devices_on();
1403
1404 rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL);
1405 rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL);
1406 rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr);
1407
1408 proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1409
1410#ifdef CONFIG_SYSCTL
1411 {
1412 int i;
1413 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1414 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1415 }
1416#endif
1417}
1418
1419void __exit dn_dev_cleanup(void)
1420{
1421#ifdef CONFIG_SYSCTL
1422 {
1423 int i;
1424 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1425 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1426 }
1427#endif
1428
1429 proc_net_remove(&init_net, "decnet_dev");
1430
1431 dn_dev_devices_off();
1432}
1433
