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Commit | Line | Data |
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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 | ||
4fc268d2 | 27 | #include <linux/capability.h> |
1da177e4 LT |
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> | |
1823730f | 37 | #include <linux/if_addr.h> |
1da177e4 LT |
38 | #include <linux/if_arp.h> |
39 | #include <linux/if_ether.h> | |
40 | #include <linux/skbuff.h> | |
1da177e4 LT |
41 | #include <linux/sysctl.h> |
42 | #include <linux/notifier.h> | |
43 | #include <asm/uaccess.h> | |
44 | #include <asm/system.h> | |
457c4cbc | 45 | #include <net/net_namespace.h> |
1da177e4 LT |
46 | #include <net/neighbour.h> |
47 | #include <net/dst.h> | |
48 | #include <net/flow.h> | |
a8731cbf | 49 | #include <net/fib_rules.h> |
a6f01cac | 50 | #include <net/netlink.h> |
1da177e4 LT |
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 | ||
59 | static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00}; | |
60 | static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00}; | |
61 | static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00}; | |
62 | static unsigned char dn_eco_version[3] = {0x02,0x00,0x00}; | |
63 | ||
64 | extern struct neigh_table dn_neigh_table; | |
65 | ||
66 | /* | |
67 | * decnet_address is kept in network order. | |
68 | */ | |
c4ea94ab | 69 | __le16 decnet_address = 0; |
1da177e4 LT |
70 | |
71 | static DEFINE_RWLOCK(dndev_lock); | |
72 | static struct net_device *decnet_default_device; | |
e041c683 | 73 | static BLOCKING_NOTIFIER_HEAD(dnaddr_chain); |
1da177e4 LT |
74 | |
75 | static struct dn_dev *dn_dev_create(struct net_device *dev, int *err); | |
76 | static void dn_dev_delete(struct net_device *dev); | |
b020b942 | 77 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa); |
1da177e4 LT |
78 | |
79 | static int dn_eth_up(struct net_device *); | |
80 | static void dn_eth_down(struct net_device *); | |
81 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa); | |
82 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa); | |
83 | ||
84 | static struct dn_dev_parms dn_dev_list[] = { | |
85 | { | |
86 | .type = ARPHRD_ETHER, /* Ethernet */ | |
87 | .mode = DN_DEV_BCAST, | |
88 | .state = DN_DEV_S_RU, | |
89 | .t2 = 1, | |
90 | .t3 = 10, | |
91 | .name = "ethernet", | |
92 | .ctl_name = NET_DECNET_CONF_ETHER, | |
93 | .up = dn_eth_up, | |
94 | .down = dn_eth_down, | |
95 | .timer3 = dn_send_brd_hello, | |
96 | }, | |
97 | { | |
98 | .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */ | |
99 | .mode = DN_DEV_BCAST, | |
100 | .state = DN_DEV_S_RU, | |
101 | .t2 = 1, | |
102 | .t3 = 10, | |
103 | .name = "ipgre", | |
104 | .ctl_name = NET_DECNET_CONF_GRE, | |
105 | .timer3 = dn_send_brd_hello, | |
106 | }, | |
107 | #if 0 | |
108 | { | |
109 | .type = ARPHRD_X25, /* Bog standard X.25 */ | |
110 | .mode = DN_DEV_UCAST, | |
111 | .state = DN_DEV_S_DS, | |
112 | .t2 = 1, | |
113 | .t3 = 120, | |
114 | .name = "x25", | |
115 | .ctl_name = NET_DECNET_CONF_X25, | |
116 | .timer3 = dn_send_ptp_hello, | |
117 | }, | |
118 | #endif | |
119 | #if 0 | |
120 | { | |
121 | .type = ARPHRD_PPP, /* DECnet over PPP */ | |
122 | .mode = DN_DEV_BCAST, | |
123 | .state = DN_DEV_S_RU, | |
124 | .t2 = 1, | |
125 | .t3 = 10, | |
126 | .name = "ppp", | |
127 | .ctl_name = NET_DECNET_CONF_PPP, | |
128 | .timer3 = dn_send_brd_hello, | |
129 | }, | |
130 | #endif | |
131 | { | |
132 | .type = ARPHRD_DDCMP, /* DECnet over DDCMP */ | |
133 | .mode = DN_DEV_UCAST, | |
134 | .state = DN_DEV_S_DS, | |
135 | .t2 = 1, | |
136 | .t3 = 120, | |
137 | .name = "ddcmp", | |
138 | .ctl_name = NET_DECNET_CONF_DDCMP, | |
139 | .timer3 = dn_send_ptp_hello, | |
140 | }, | |
141 | { | |
142 | .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */ | |
143 | .mode = DN_DEV_BCAST, | |
144 | .state = DN_DEV_S_RU, | |
145 | .t2 = 1, | |
146 | .t3 = 10, | |
147 | .name = "loopback", | |
148 | .ctl_name = NET_DECNET_CONF_LOOPBACK, | |
149 | .timer3 = dn_send_brd_hello, | |
150 | } | |
151 | }; | |
152 | ||
8b14a536 | 153 | #define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list) |
1da177e4 | 154 | |
8fa0b315 | 155 | #define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x) |
1da177e4 LT |
156 | |
157 | #ifdef CONFIG_SYSCTL | |
158 | ||
159 | static int min_t2[] = { 1 }; | |
160 | static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */ | |
161 | static int min_t3[] = { 1 }; | |
162 | static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */ | |
163 | ||
164 | static int min_priority[1]; | |
165 | static int max_priority[] = { 127 }; /* From DECnet spec */ | |
166 | ||
8d65af78 | 167 | static int dn_forwarding_proc(ctl_table *, int, |
1da177e4 | 168 | void __user *, size_t *, loff_t *); |
f221e726 | 169 | static int dn_forwarding_sysctl(ctl_table *table, |
1da177e4 | 170 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 171 | void __user *newval, size_t newlen); |
1da177e4 LT |
172 | |
173 | static struct dn_dev_sysctl_table { | |
174 | struct ctl_table_header *sysctl_header; | |
175 | ctl_table dn_dev_vars[5]; | |
1da177e4 LT |
176 | } dn_dev_sysctl = { |
177 | NULL, | |
178 | { | |
179 | { | |
180 | .ctl_name = NET_DECNET_CONF_DEV_FORWARDING, | |
181 | .procname = "forwarding", | |
182 | .data = (void *)DN_DEV_PARMS_OFFSET(forwarding), | |
183 | .maxlen = sizeof(int), | |
184 | .mode = 0644, | |
185 | .proc_handler = dn_forwarding_proc, | |
186 | .strategy = dn_forwarding_sysctl, | |
187 | }, | |
188 | { | |
189 | .ctl_name = NET_DECNET_CONF_DEV_PRIORITY, | |
190 | .procname = "priority", | |
191 | .data = (void *)DN_DEV_PARMS_OFFSET(priority), | |
192 | .maxlen = sizeof(int), | |
193 | .mode = 0644, | |
194 | .proc_handler = proc_dointvec_minmax, | |
195 | .strategy = sysctl_intvec, | |
196 | .extra1 = &min_priority, | |
197 | .extra2 = &max_priority | |
198 | }, | |
199 | { | |
200 | .ctl_name = NET_DECNET_CONF_DEV_T2, | |
201 | .procname = "t2", | |
202 | .data = (void *)DN_DEV_PARMS_OFFSET(t2), | |
203 | .maxlen = sizeof(int), | |
204 | .mode = 0644, | |
205 | .proc_handler = proc_dointvec_minmax, | |
206 | .strategy = sysctl_intvec, | |
207 | .extra1 = &min_t2, | |
208 | .extra2 = &max_t2 | |
209 | }, | |
210 | { | |
211 | .ctl_name = NET_DECNET_CONF_DEV_T3, | |
212 | .procname = "t3", | |
213 | .data = (void *)DN_DEV_PARMS_OFFSET(t3), | |
214 | .maxlen = sizeof(int), | |
215 | .mode = 0644, | |
216 | .proc_handler = proc_dointvec_minmax, | |
217 | .strategy = sysctl_intvec, | |
218 | .extra1 = &min_t3, | |
219 | .extra2 = &max_t3 | |
220 | }, | |
221 | {0} | |
222 | }, | |
1da177e4 LT |
223 | }; |
224 | ||
225 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) | |
226 | { | |
227 | struct dn_dev_sysctl_table *t; | |
228 | int i; | |
229 | ||
3151a9ab PE |
230 | #define DN_CTL_PATH_DEV 3 |
231 | ||
232 | struct ctl_path dn_ctl_path[] = { | |
233 | { .procname = "net", .ctl_name = CTL_NET, }, | |
234 | { .procname = "decnet", .ctl_name = NET_DECNET, }, | |
235 | { .procname = "conf", .ctl_name = NET_DECNET_CONF, }, | |
236 | { /* to be set */ }, | |
237 | { }, | |
238 | }; | |
239 | ||
c66b721a | 240 | t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 LT |
241 | if (t == NULL) |
242 | return; | |
243 | ||
1da177e4 LT |
244 | for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) { |
245 | long offset = (long)t->dn_dev_vars[i].data; | |
246 | t->dn_dev_vars[i].data = ((char *)parms) + offset; | |
1da177e4 LT |
247 | } |
248 | ||
249 | if (dev) { | |
3151a9ab PE |
250 | dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name; |
251 | dn_ctl_path[DN_CTL_PATH_DEV].ctl_name = dev->ifindex; | |
1da177e4 | 252 | } else { |
3151a9ab PE |
253 | dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name; |
254 | dn_ctl_path[DN_CTL_PATH_DEV].ctl_name = parms->ctl_name; | |
1da177e4 LT |
255 | } |
256 | ||
1da177e4 LT |
257 | t->dn_dev_vars[0].extra1 = (void *)dev; |
258 | ||
3151a9ab | 259 | t->sysctl_header = register_sysctl_paths(dn_ctl_path, t->dn_dev_vars); |
1da177e4 LT |
260 | if (t->sysctl_header == NULL) |
261 | kfree(t); | |
262 | else | |
263 | parms->sysctl = t; | |
264 | } | |
265 | ||
266 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) | |
267 | { | |
268 | if (parms->sysctl) { | |
269 | struct dn_dev_sysctl_table *t = parms->sysctl; | |
270 | parms->sysctl = NULL; | |
271 | unregister_sysctl_table(t->sysctl_header); | |
272 | kfree(t); | |
273 | } | |
274 | } | |
275 | ||
429eb0fa | 276 | static int dn_forwarding_proc(ctl_table *table, int write, |
1da177e4 LT |
277 | void __user *buffer, |
278 | size_t *lenp, loff_t *ppos) | |
279 | { | |
280 | #ifdef CONFIG_DECNET_ROUTER | |
281 | struct net_device *dev = table->extra1; | |
282 | struct dn_dev *dn_db; | |
283 | int err; | |
284 | int tmp, old; | |
285 | ||
286 | if (table->extra1 == NULL) | |
287 | return -EINVAL; | |
288 | ||
289 | dn_db = dev->dn_ptr; | |
290 | old = dn_db->parms.forwarding; | |
291 | ||
8d65af78 | 292 | err = proc_dointvec(table, write, buffer, lenp, ppos); |
1da177e4 LT |
293 | |
294 | if ((err >= 0) && write) { | |
295 | if (dn_db->parms.forwarding < 0) | |
296 | dn_db->parms.forwarding = 0; | |
297 | if (dn_db->parms.forwarding > 2) | |
298 | dn_db->parms.forwarding = 2; | |
299 | /* | |
300 | * What an ugly hack this is... its works, just. It | |
301 | * would be nice if sysctl/proc were just that little | |
302 | * bit more flexible so I don't have to write a special | |
303 | * routine, or suffer hacks like this - SJW | |
304 | */ | |
305 | tmp = dn_db->parms.forwarding; | |
306 | dn_db->parms.forwarding = old; | |
307 | if (dn_db->parms.down) | |
308 | dn_db->parms.down(dev); | |
309 | dn_db->parms.forwarding = tmp; | |
310 | if (dn_db->parms.up) | |
311 | dn_db->parms.up(dev); | |
312 | } | |
313 | ||
314 | return err; | |
315 | #else | |
316 | return -EINVAL; | |
317 | #endif | |
318 | } | |
319 | ||
f221e726 | 320 | static int dn_forwarding_sysctl(ctl_table *table, |
1da177e4 | 321 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 322 | void __user *newval, size_t newlen) |
1da177e4 LT |
323 | { |
324 | #ifdef CONFIG_DECNET_ROUTER | |
325 | struct net_device *dev = table->extra1; | |
326 | struct dn_dev *dn_db; | |
327 | int value; | |
328 | ||
329 | if (table->extra1 == NULL) | |
330 | return -EINVAL; | |
331 | ||
332 | dn_db = dev->dn_ptr; | |
333 | ||
334 | if (newval && newlen) { | |
335 | if (newlen != sizeof(int)) | |
336 | return -EINVAL; | |
337 | ||
338 | if (get_user(value, (int __user *)newval)) | |
339 | return -EFAULT; | |
340 | if (value < 0) | |
341 | return -EINVAL; | |
342 | if (value > 2) | |
343 | return -EINVAL; | |
344 | ||
345 | if (dn_db->parms.down) | |
346 | dn_db->parms.down(dev); | |
347 | dn_db->parms.forwarding = value; | |
348 | if (dn_db->parms.up) | |
349 | dn_db->parms.up(dev); | |
350 | } | |
351 | ||
352 | return 0; | |
353 | #else | |
354 | return -EINVAL; | |
355 | #endif | |
356 | } | |
357 | ||
358 | #else /* CONFIG_SYSCTL */ | |
359 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) | |
360 | { | |
361 | } | |
362 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) | |
363 | { | |
364 | } | |
365 | ||
366 | #endif /* CONFIG_SYSCTL */ | |
367 | ||
368 | static inline __u16 mtu2blksize(struct net_device *dev) | |
369 | { | |
370 | u32 blksize = dev->mtu; | |
371 | if (blksize > 0xffff) | |
372 | blksize = 0xffff; | |
373 | ||
374 | if (dev->type == ARPHRD_ETHER || | |
375 | dev->type == ARPHRD_PPP || | |
376 | dev->type == ARPHRD_IPGRE || | |
377 | dev->type == ARPHRD_LOOPBACK) | |
378 | blksize -= 2; | |
379 | ||
380 | return (__u16)blksize; | |
381 | } | |
382 | ||
383 | static struct dn_ifaddr *dn_dev_alloc_ifa(void) | |
384 | { | |
385 | struct dn_ifaddr *ifa; | |
386 | ||
0da974f4 | 387 | ifa = kzalloc(sizeof(*ifa), GFP_KERNEL); |
1da177e4 LT |
388 | |
389 | return ifa; | |
390 | } | |
391 | ||
392 | static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa) | |
393 | { | |
394 | kfree(ifa); | |
395 | } | |
396 | ||
397 | static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy) | |
398 | { | |
399 | struct dn_ifaddr *ifa1 = *ifap; | |
400 | unsigned char mac_addr[6]; | |
401 | struct net_device *dev = dn_db->dev; | |
402 | ||
403 | ASSERT_RTNL(); | |
404 | ||
405 | *ifap = ifa1->ifa_next; | |
406 | ||
407 | if (dn_db->dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 408 | if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 LT |
409 | dn_dn2eth(mac_addr, ifa1->ifa_local); |
410 | dev_mc_delete(dev, mac_addr, ETH_ALEN, 0); | |
411 | } | |
412 | } | |
413 | ||
b020b942 | 414 | dn_ifaddr_notify(RTM_DELADDR, ifa1); |
e041c683 | 415 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1); |
1da177e4 LT |
416 | if (destroy) { |
417 | dn_dev_free_ifa(ifa1); | |
418 | ||
419 | if (dn_db->ifa_list == NULL) | |
420 | dn_dev_delete(dn_db->dev); | |
421 | } | |
422 | } | |
423 | ||
424 | static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
425 | { | |
426 | struct net_device *dev = dn_db->dev; | |
427 | struct dn_ifaddr *ifa1; | |
428 | unsigned char mac_addr[6]; | |
429 | ||
430 | ASSERT_RTNL(); | |
431 | ||
429eb0fa | 432 | /* Check for duplicates */ |
1da177e4 LT |
433 | for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) { |
434 | if (ifa1->ifa_local == ifa->ifa_local) | |
435 | return -EEXIST; | |
436 | } | |
437 | ||
438 | if (dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 439 | if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 LT |
440 | dn_dn2eth(mac_addr, ifa->ifa_local); |
441 | dev_mc_add(dev, mac_addr, ETH_ALEN, 0); | |
1da177e4 LT |
442 | } |
443 | } | |
444 | ||
445 | ifa->ifa_next = dn_db->ifa_list; | |
446 | dn_db->ifa_list = ifa; | |
447 | ||
b020b942 | 448 | dn_ifaddr_notify(RTM_NEWADDR, ifa); |
e041c683 | 449 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
450 | |
451 | return 0; | |
452 | } | |
453 | ||
454 | static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa) | |
455 | { | |
456 | struct dn_dev *dn_db = dev->dn_ptr; | |
457 | int rv; | |
458 | ||
459 | if (dn_db == NULL) { | |
460 | int err; | |
461 | dn_db = dn_dev_create(dev, &err); | |
462 | if (dn_db == NULL) | |
463 | return err; | |
464 | } | |
465 | ||
466 | ifa->ifa_dev = dn_db; | |
467 | ||
468 | if (dev->flags & IFF_LOOPBACK) | |
469 | ifa->ifa_scope = RT_SCOPE_HOST; | |
470 | ||
471 | rv = dn_dev_insert_ifa(dn_db, ifa); | |
472 | if (rv) | |
473 | dn_dev_free_ifa(ifa); | |
474 | return rv; | |
475 | } | |
476 | ||
477 | ||
478 | int dn_dev_ioctl(unsigned int cmd, void __user *arg) | |
479 | { | |
480 | char buffer[DN_IFREQ_SIZE]; | |
481 | struct ifreq *ifr = (struct ifreq *)buffer; | |
482 | struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr; | |
483 | struct dn_dev *dn_db; | |
484 | struct net_device *dev; | |
485 | struct dn_ifaddr *ifa = NULL, **ifap = NULL; | |
486 | int ret = 0; | |
487 | ||
488 | if (copy_from_user(ifr, arg, DN_IFREQ_SIZE)) | |
489 | return -EFAULT; | |
490 | ifr->ifr_name[IFNAMSIZ-1] = 0; | |
491 | ||
881d966b | 492 | dev_load(&init_net, ifr->ifr_name); |
1da177e4 LT |
493 | |
494 | switch(cmd) { | |
495 | case SIOCGIFADDR: | |
496 | break; | |
497 | case SIOCSIFADDR: | |
498 | if (!capable(CAP_NET_ADMIN)) | |
499 | return -EACCES; | |
500 | if (sdn->sdn_family != AF_DECnet) | |
501 | return -EINVAL; | |
502 | break; | |
503 | default: | |
504 | return -EINVAL; | |
505 | } | |
506 | ||
507 | rtnl_lock(); | |
508 | ||
881d966b | 509 | if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) { |
1da177e4 LT |
510 | ret = -ENODEV; |
511 | goto done; | |
512 | } | |
513 | ||
514 | if ((dn_db = dev->dn_ptr) != NULL) { | |
515 | for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next) | |
516 | if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0) | |
517 | break; | |
518 | } | |
519 | ||
520 | if (ifa == NULL && cmd != SIOCSIFADDR) { | |
521 | ret = -EADDRNOTAVAIL; | |
522 | goto done; | |
523 | } | |
524 | ||
525 | switch(cmd) { | |
526 | case SIOCGIFADDR: | |
c4ea94ab | 527 | *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local; |
1da177e4 LT |
528 | goto rarok; |
529 | ||
530 | case SIOCSIFADDR: | |
531 | if (!ifa) { | |
532 | if ((ifa = dn_dev_alloc_ifa()) == NULL) { | |
533 | ret = -ENOBUFS; | |
534 | break; | |
535 | } | |
536 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
537 | } else { | |
538 | if (ifa->ifa_local == dn_saddr2dn(sdn)) | |
539 | break; | |
540 | dn_dev_del_ifa(dn_db, ifap, 0); | |
541 | } | |
542 | ||
543 | ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn); | |
544 | ||
545 | ret = dn_dev_set_ifa(dev, ifa); | |
546 | } | |
547 | done: | |
548 | rtnl_unlock(); | |
549 | ||
550 | return ret; | |
551 | rarok: | |
552 | if (copy_to_user(arg, ifr, DN_IFREQ_SIZE)) | |
553 | ret = -EFAULT; | |
554 | goto done; | |
555 | } | |
556 | ||
557 | struct net_device *dn_dev_get_default(void) | |
558 | { | |
559 | struct net_device *dev; | |
560 | read_lock(&dndev_lock); | |
561 | dev = decnet_default_device; | |
562 | if (dev) { | |
563 | if (dev->dn_ptr) | |
564 | dev_hold(dev); | |
565 | else | |
566 | dev = NULL; | |
567 | } | |
568 | read_unlock(&dndev_lock); | |
569 | return dev; | |
570 | } | |
571 | ||
572 | int dn_dev_set_default(struct net_device *dev, int force) | |
573 | { | |
574 | struct net_device *old = NULL; | |
575 | int rv = -EBUSY; | |
576 | if (!dev->dn_ptr) | |
577 | return -ENODEV; | |
578 | write_lock(&dndev_lock); | |
579 | if (force || decnet_default_device == NULL) { | |
580 | old = decnet_default_device; | |
581 | decnet_default_device = dev; | |
582 | rv = 0; | |
583 | } | |
584 | write_unlock(&dndev_lock); | |
585 | if (old) | |
6a57b2ee | 586 | dev_put(old); |
1da177e4 LT |
587 | return rv; |
588 | } | |
589 | ||
590 | static void dn_dev_check_default(struct net_device *dev) | |
591 | { | |
592 | write_lock(&dndev_lock); | |
593 | if (dev == decnet_default_device) { | |
594 | decnet_default_device = NULL; | |
595 | } else { | |
596 | dev = NULL; | |
597 | } | |
598 | write_unlock(&dndev_lock); | |
599 | if (dev) | |
600 | dev_put(dev); | |
601 | } | |
602 | ||
603 | static struct dn_dev *dn_dev_by_index(int ifindex) | |
604 | { | |
605 | struct net_device *dev; | |
606 | struct dn_dev *dn_dev = NULL; | |
881d966b | 607 | dev = dev_get_by_index(&init_net, ifindex); |
1da177e4 LT |
608 | if (dev) { |
609 | dn_dev = dev->dn_ptr; | |
610 | dev_put(dev); | |
611 | } | |
612 | ||
613 | return dn_dev; | |
614 | } | |
615 | ||
ef7c79ed | 616 | static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = { |
4a89c256 TG |
617 | [IFA_ADDRESS] = { .type = NLA_U16 }, |
618 | [IFA_LOCAL] = { .type = NLA_U16 }, | |
619 | [IFA_LABEL] = { .type = NLA_STRING, | |
620 | .len = IFNAMSIZ - 1 }, | |
621 | }; | |
622 | ||
623 | static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
1da177e4 | 624 | { |
3b1e0a65 | 625 | struct net *net = sock_net(skb->sk); |
4a89c256 | 626 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 | 627 | struct dn_dev *dn_db; |
4a89c256 | 628 | struct ifaddrmsg *ifm; |
1da177e4 | 629 | struct dn_ifaddr *ifa, **ifap; |
b854272b DL |
630 | int err = -EINVAL; |
631 | ||
632 | if (net != &init_net) | |
633 | goto errout; | |
4a89c256 TG |
634 | |
635 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); | |
636 | if (err < 0) | |
637 | goto errout; | |
1da177e4 | 638 | |
3ccd8624 | 639 | err = -ENODEV; |
4a89c256 | 640 | ifm = nlmsg_data(nlh); |
1da177e4 | 641 | if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL) |
4a89c256 TG |
642 | goto errout; |
643 | ||
3ccd8624 | 644 | err = -EADDRNOTAVAIL; |
4a89c256 TG |
645 | for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) { |
646 | if (tb[IFA_LOCAL] && | |
647 | nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2)) | |
648 | continue; | |
1da177e4 | 649 | |
4a89c256 | 650 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
1da177e4 LT |
651 | continue; |
652 | ||
653 | dn_dev_del_ifa(dn_db, ifap, 1); | |
654 | return 0; | |
655 | } | |
656 | ||
4a89c256 TG |
657 | errout: |
658 | return err; | |
1da177e4 LT |
659 | } |
660 | ||
4a89c256 | 661 | static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1da177e4 | 662 | { |
3b1e0a65 | 663 | struct net *net = sock_net(skb->sk); |
4a89c256 | 664 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 LT |
665 | struct net_device *dev; |
666 | struct dn_dev *dn_db; | |
4a89c256 | 667 | struct ifaddrmsg *ifm; |
1da177e4 | 668 | struct dn_ifaddr *ifa; |
4a89c256 TG |
669 | int err; |
670 | ||
b854272b DL |
671 | if (net != &init_net) |
672 | return -EINVAL; | |
673 | ||
4a89c256 TG |
674 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); |
675 | if (err < 0) | |
676 | return err; | |
1da177e4 | 677 | |
4a89c256 | 678 | if (tb[IFA_LOCAL] == NULL) |
1da177e4 LT |
679 | return -EINVAL; |
680 | ||
4a89c256 | 681 | ifm = nlmsg_data(nlh); |
881d966b | 682 | if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL) |
1da177e4 LT |
683 | return -ENODEV; |
684 | ||
685 | if ((dn_db = dev->dn_ptr) == NULL) { | |
1da177e4 LT |
686 | dn_db = dn_dev_create(dev, &err); |
687 | if (!dn_db) | |
688 | return err; | |
689 | } | |
429eb0fa | 690 | |
1da177e4 LT |
691 | if ((ifa = dn_dev_alloc_ifa()) == NULL) |
692 | return -ENOBUFS; | |
693 | ||
4a89c256 TG |
694 | if (tb[IFA_ADDRESS] == NULL) |
695 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; | |
696 | ||
697 | ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]); | |
698 | ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]); | |
1da177e4 LT |
699 | ifa->ifa_flags = ifm->ifa_flags; |
700 | ifa->ifa_scope = ifm->ifa_scope; | |
701 | ifa->ifa_dev = dn_db; | |
4a89c256 TG |
702 | |
703 | if (tb[IFA_LABEL]) | |
704 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); | |
1da177e4 LT |
705 | else |
706 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
707 | ||
4a89c256 TG |
708 | err = dn_dev_insert_ifa(dn_db, ifa); |
709 | if (err) | |
1da177e4 | 710 | dn_dev_free_ifa(ifa); |
4a89c256 TG |
711 | |
712 | return err; | |
1da177e4 LT |
713 | } |
714 | ||
a6f01cac TG |
715 | static inline size_t dn_ifaddr_nlmsg_size(void) |
716 | { | |
717 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) | |
718 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ | |
719 | + nla_total_size(2) /* IFA_ADDRESS */ | |
720 | + nla_total_size(2); /* IFA_LOCAL */ | |
721 | } | |
722 | ||
4a89c256 TG |
723 | static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa, |
724 | u32 pid, u32 seq, int event, unsigned int flags) | |
1da177e4 LT |
725 | { |
726 | struct ifaddrmsg *ifm; | |
727 | struct nlmsghdr *nlh; | |
1da177e4 | 728 | |
4a89c256 TG |
729 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags); |
730 | if (nlh == NULL) | |
26932566 | 731 | return -EMSGSIZE; |
1da177e4 | 732 | |
4a89c256 | 733 | ifm = nlmsg_data(nlh); |
1da177e4 LT |
734 | ifm->ifa_family = AF_DECnet; |
735 | ifm->ifa_prefixlen = 16; | |
736 | ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT; | |
737 | ifm->ifa_scope = ifa->ifa_scope; | |
738 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; | |
4a89c256 | 739 | |
1da177e4 | 740 | if (ifa->ifa_address) |
4a89c256 | 741 | NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address); |
1da177e4 | 742 | if (ifa->ifa_local) |
4a89c256 | 743 | NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local); |
1da177e4 | 744 | if (ifa->ifa_label[0]) |
4a89c256 | 745 | NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label); |
1da177e4 | 746 | |
4a89c256 TG |
747 | return nlmsg_end(skb, nlh); |
748 | ||
749 | nla_put_failure: | |
26932566 PM |
750 | nlmsg_cancel(skb, nlh); |
751 | return -EMSGSIZE; | |
1da177e4 LT |
752 | } |
753 | ||
b020b942 | 754 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa) |
1da177e4 LT |
755 | { |
756 | struct sk_buff *skb; | |
dc738dd8 | 757 | int err = -ENOBUFS; |
1da177e4 | 758 | |
a6f01cac | 759 | skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL); |
dc738dd8 TG |
760 | if (skb == NULL) |
761 | goto errout; | |
762 | ||
4a89c256 | 763 | err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
26932566 PM |
764 | if (err < 0) { |
765 | /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */ | |
766 | WARN_ON(err == -EMSGSIZE); | |
767 | kfree_skb(skb); | |
768 | goto errout; | |
769 | } | |
1ce85fe4 PNA |
770 | rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL); |
771 | return; | |
dc738dd8 TG |
772 | errout: |
773 | if (err < 0) | |
97c53cac | 774 | rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err); |
1da177e4 LT |
775 | } |
776 | ||
4a89c256 | 777 | static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 778 | { |
3b1e0a65 | 779 | struct net *net = sock_net(skb->sk); |
4a89c256 | 780 | int idx, dn_idx = 0, skip_ndevs, skip_naddr; |
1da177e4 LT |
781 | struct net_device *dev; |
782 | struct dn_dev *dn_db; | |
783 | struct dn_ifaddr *ifa; | |
784 | ||
b854272b DL |
785 | if (net != &init_net) |
786 | return 0; | |
787 | ||
4a89c256 TG |
788 | skip_ndevs = cb->args[0]; |
789 | skip_naddr = cb->args[1]; | |
790 | ||
7562f876 | 791 | idx = 0; |
881d966b | 792 | for_each_netdev(&init_net, dev) { |
4a89c256 | 793 | if (idx < skip_ndevs) |
7562f876 | 794 | goto cont; |
4a89c256 TG |
795 | else if (idx > skip_ndevs) { |
796 | /* Only skip over addresses for first dev dumped | |
797 | * in this iteration (idx == skip_ndevs) */ | |
798 | skip_naddr = 0; | |
799 | } | |
800 | ||
1da177e4 | 801 | if ((dn_db = dev->dn_ptr) == NULL) |
7562f876 | 802 | goto cont; |
1da177e4 | 803 | |
4a89c256 TG |
804 | for (ifa = dn_db->ifa_list, dn_idx = 0; ifa; |
805 | ifa = ifa->ifa_next, dn_idx++) { | |
806 | if (dn_idx < skip_naddr) | |
a2221f30 | 807 | continue; |
1da177e4 | 808 | |
4a89c256 TG |
809 | if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid, |
810 | cb->nlh->nlmsg_seq, RTM_NEWADDR, | |
811 | NLM_F_MULTI) < 0) | |
1da177e4 LT |
812 | goto done; |
813 | } | |
7562f876 PE |
814 | cont: |
815 | idx++; | |
1da177e4 LT |
816 | } |
817 | done: | |
1da177e4 LT |
818 | cb->args[0] = idx; |
819 | cb->args[1] = dn_idx; | |
820 | ||
821 | return skb->len; | |
822 | } | |
823 | ||
c4ea94ab | 824 | static int dn_dev_get_first(struct net_device *dev, __le16 *addr) |
1da177e4 LT |
825 | { |
826 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; | |
827 | struct dn_ifaddr *ifa; | |
828 | int rv = -ENODEV; | |
829 | if (dn_db == NULL) | |
830 | goto out; | |
831 | ifa = dn_db->ifa_list; | |
832 | if (ifa != NULL) { | |
833 | *addr = ifa->ifa_local; | |
834 | rv = 0; | |
835 | } | |
836 | out: | |
837 | return rv; | |
838 | } | |
839 | ||
429eb0fa | 840 | /* |
1da177e4 LT |
841 | * Find a default address to bind to. |
842 | * | |
843 | * This is one of those areas where the initial VMS concepts don't really | |
844 | * map onto the Linux concepts, and since we introduced multiple addresses | |
845 | * per interface we have to cope with slightly odd ways of finding out what | |
846 | * "our address" really is. Mostly it's not a problem; for this we just guess | |
847 | * a sensible default. Eventually the routing code will take care of all the | |
848 | * nasties for us I hope. | |
849 | */ | |
c4ea94ab | 850 | int dn_dev_bind_default(__le16 *addr) |
1da177e4 LT |
851 | { |
852 | struct net_device *dev; | |
853 | int rv; | |
854 | dev = dn_dev_get_default(); | |
855 | last_chance: | |
856 | if (dev) { | |
857 | read_lock(&dev_base_lock); | |
858 | rv = dn_dev_get_first(dev, addr); | |
859 | read_unlock(&dev_base_lock); | |
860 | dev_put(dev); | |
2774c7ab | 861 | if (rv == 0 || dev == init_net.loopback_dev) |
1da177e4 LT |
862 | return rv; |
863 | } | |
2774c7ab | 864 | dev = init_net.loopback_dev; |
1da177e4 LT |
865 | dev_hold(dev); |
866 | goto last_chance; | |
867 | } | |
868 | ||
869 | static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
870 | { | |
429eb0fa YH |
871 | struct endnode_hello_message *msg; |
872 | struct sk_buff *skb = NULL; | |
873 | __le16 *pktlen; | |
1da177e4 LT |
874 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; |
875 | ||
429eb0fa | 876 | if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
877 | return; |
878 | ||
429eb0fa | 879 | skb->dev = dev; |
1da177e4 | 880 | |
429eb0fa | 881 | msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg)); |
1da177e4 | 882 | |
429eb0fa YH |
883 | msg->msgflg = 0x0D; |
884 | memcpy(msg->tiver, dn_eco_version, 3); | |
1da177e4 | 885 | dn_dn2eth(msg->id, ifa->ifa_local); |
429eb0fa | 886 | msg->iinfo = DN_RT_INFO_ENDN; |
c4106aa8 | 887 | msg->blksize = cpu_to_le16(mtu2blksize(dev)); |
429eb0fa YH |
888 | msg->area = 0x00; |
889 | memset(msg->seed, 0, 8); | |
890 | memcpy(msg->neighbor, dn_hiord, ETH_ALEN); | |
1da177e4 LT |
891 | |
892 | if (dn_db->router) { | |
893 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; | |
894 | dn_dn2eth(msg->neighbor, dn->addr); | |
895 | } | |
896 | ||
c4106aa8 | 897 | msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3); |
429eb0fa YH |
898 | msg->mpd = 0x00; |
899 | msg->datalen = 0x02; | |
900 | memset(msg->data, 0xAA, 2); | |
901 | ||
902 | pktlen = (__le16 *)skb_push(skb,2); | |
c4106aa8 | 903 | *pktlen = cpu_to_le16(skb->len - 2); |
1da177e4 | 904 | |
c1d2bbe1 | 905 | skb_reset_network_header(skb); |
1da177e4 LT |
906 | |
907 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id); | |
908 | } | |
909 | ||
910 | ||
911 | #define DRDELAY (5 * HZ) | |
912 | ||
913 | static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
914 | { | |
915 | /* First check time since device went up */ | |
916 | if ((jiffies - dn_db->uptime) < DRDELAY) | |
917 | return 0; | |
918 | ||
919 | /* If there is no router, then yes... */ | |
920 | if (!dn_db->router) | |
921 | return 1; | |
922 | ||
923 | /* otherwise only if we have a higher priority or.. */ | |
924 | if (dn->priority < dn_db->parms.priority) | |
925 | return 1; | |
926 | ||
927 | /* if we have equal priority and a higher node number */ | |
928 | if (dn->priority != dn_db->parms.priority) | |
929 | return 0; | |
930 | ||
c4106aa8 | 931 | if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local)) |
1da177e4 LT |
932 | return 1; |
933 | ||
934 | return 0; | |
935 | } | |
936 | ||
937 | static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
938 | { | |
939 | int n; | |
940 | struct dn_dev *dn_db = dev->dn_ptr; | |
941 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; | |
942 | struct sk_buff *skb; | |
943 | size_t size; | |
944 | unsigned char *ptr; | |
945 | unsigned char *i1, *i2; | |
c4ea94ab | 946 | __le16 *pktlen; |
1da177e4 LT |
947 | char *src; |
948 | ||
949 | if (mtu2blksize(dev) < (26 + 7)) | |
950 | return; | |
951 | ||
952 | n = mtu2blksize(dev) - 26; | |
953 | n /= 7; | |
954 | ||
955 | if (n > 32) | |
956 | n = 32; | |
957 | ||
958 | size = 2 + 26 + 7 * n; | |
959 | ||
960 | if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL) | |
961 | return; | |
962 | ||
963 | skb->dev = dev; | |
964 | ptr = skb_put(skb, size); | |
965 | ||
966 | *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH; | |
967 | *ptr++ = 2; /* ECO */ | |
968 | *ptr++ = 0; | |
969 | *ptr++ = 0; | |
970 | dn_dn2eth(ptr, ifa->ifa_local); | |
971 | src = ptr; | |
972 | ptr += ETH_ALEN; | |
429eb0fa | 973 | *ptr++ = dn_db->parms.forwarding == 1 ? |
1da177e4 | 974 | DN_RT_INFO_L1RT : DN_RT_INFO_L2RT; |
c4106aa8 | 975 | *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev)); |
1da177e4 | 976 | ptr += 2; |
429eb0fa | 977 | *ptr++ = dn_db->parms.priority; /* Priority */ |
1da177e4 | 978 | *ptr++ = 0; /* Area: Reserved */ |
c4106aa8 | 979 | *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3); |
1da177e4 LT |
980 | ptr += 2; |
981 | *ptr++ = 0; /* MPD: Reserved */ | |
982 | i1 = ptr++; | |
983 | memset(ptr, 0, 7); /* Name: Reserved */ | |
984 | ptr += 7; | |
985 | i2 = ptr++; | |
986 | ||
987 | n = dn_neigh_elist(dev, ptr, n); | |
988 | ||
989 | *i2 = 7 * n; | |
990 | *i1 = 8 + *i2; | |
991 | ||
992 | skb_trim(skb, (27 + *i2)); | |
993 | ||
c4ea94ab | 994 | pktlen = (__le16 *)skb_push(skb, 2); |
c4106aa8 | 995 | *pktlen = cpu_to_le16(skb->len - 2); |
1da177e4 | 996 | |
c1d2bbe1 | 997 | skb_reset_network_header(skb); |
1da177e4 LT |
998 | |
999 | if (dn_am_i_a_router(dn, dn_db, ifa)) { | |
1000 | struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); | |
1001 | if (skb2) { | |
1002 | dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src); | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
1007 | } | |
1008 | ||
1009 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
1010 | { | |
1011 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; | |
1012 | ||
1013 | if (dn_db->parms.forwarding == 0) | |
1014 | dn_send_endnode_hello(dev, ifa); | |
1015 | else | |
1016 | dn_send_router_hello(dev, ifa); | |
1017 | } | |
1018 | ||
1019 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
1020 | { | |
1021 | int tdlen = 16; | |
1022 | int size = dev->hard_header_len + 2 + 4 + tdlen; | |
1023 | struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC); | |
1024 | int i; | |
1025 | unsigned char *ptr; | |
1026 | char src[ETH_ALEN]; | |
1027 | ||
1028 | if (skb == NULL) | |
1029 | return ; | |
1030 | ||
1031 | skb->dev = dev; | |
1032 | skb_push(skb, dev->hard_header_len); | |
1033 | ptr = skb_put(skb, 2 + 4 + tdlen); | |
1034 | ||
1035 | *ptr++ = DN_RT_PKT_HELO; | |
c4ea94ab | 1036 | *((__le16 *)ptr) = ifa->ifa_local; |
1da177e4 LT |
1037 | ptr += 2; |
1038 | *ptr++ = tdlen; | |
1039 | ||
1040 | for(i = 0; i < tdlen; i++) | |
1041 | *ptr++ = 0252; | |
1042 | ||
1043 | dn_dn2eth(src, ifa->ifa_local); | |
1044 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
1045 | } | |
1046 | ||
1047 | static int dn_eth_up(struct net_device *dev) | |
1048 | { | |
1049 | struct dn_dev *dn_db = dev->dn_ptr; | |
1050 | ||
1051 | if (dn_db->parms.forwarding == 0) | |
1052 | dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0); | |
1053 | else | |
1054 | dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0); | |
1055 | ||
1da177e4 LT |
1056 | dn_db->use_long = 1; |
1057 | ||
1058 | return 0; | |
1059 | } | |
1060 | ||
1061 | static void dn_eth_down(struct net_device *dev) | |
1062 | { | |
1063 | struct dn_dev *dn_db = dev->dn_ptr; | |
1064 | ||
1065 | if (dn_db->parms.forwarding == 0) | |
1066 | dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0); | |
1067 | else | |
1068 | dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0); | |
1069 | } | |
1070 | ||
1071 | static void dn_dev_set_timer(struct net_device *dev); | |
1072 | ||
1073 | static void dn_dev_timer_func(unsigned long arg) | |
1074 | { | |
1075 | struct net_device *dev = (struct net_device *)arg; | |
1076 | struct dn_dev *dn_db = dev->dn_ptr; | |
1077 | struct dn_ifaddr *ifa; | |
1078 | ||
1079 | if (dn_db->t3 <= dn_db->parms.t2) { | |
1080 | if (dn_db->parms.timer3) { | |
1081 | for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1082 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) | |
1083 | dn_db->parms.timer3(dev, ifa); | |
1084 | } | |
1085 | } | |
1086 | dn_db->t3 = dn_db->parms.t3; | |
1087 | } else { | |
1088 | dn_db->t3 -= dn_db->parms.t2; | |
1089 | } | |
1090 | ||
1091 | dn_dev_set_timer(dev); | |
1092 | } | |
1093 | ||
1094 | static void dn_dev_set_timer(struct net_device *dev) | |
1095 | { | |
1096 | struct dn_dev *dn_db = dev->dn_ptr; | |
1097 | ||
1098 | if (dn_db->parms.t2 > dn_db->parms.t3) | |
1099 | dn_db->parms.t2 = dn_db->parms.t3; | |
1100 | ||
1101 | dn_db->timer.data = (unsigned long)dev; | |
1102 | dn_db->timer.function = dn_dev_timer_func; | |
1103 | dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ); | |
1104 | ||
1105 | add_timer(&dn_db->timer); | |
1106 | } | |
1107 | ||
5eaa65b2 | 1108 | static struct dn_dev *dn_dev_create(struct net_device *dev, int *err) |
1da177e4 LT |
1109 | { |
1110 | int i; | |
1111 | struct dn_dev_parms *p = dn_dev_list; | |
1112 | struct dn_dev *dn_db; | |
1113 | ||
1114 | for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) { | |
1115 | if (p->type == dev->type) | |
1116 | break; | |
1117 | } | |
1118 | ||
1119 | *err = -ENODEV; | |
1120 | if (i == DN_DEV_LIST_SIZE) | |
1121 | return NULL; | |
1122 | ||
1123 | *err = -ENOBUFS; | |
0da974f4 | 1124 | if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
1125 | return NULL; |
1126 | ||
1da177e4 LT |
1127 | memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms)); |
1128 | smp_wmb(); | |
1129 | dev->dn_ptr = dn_db; | |
1130 | dn_db->dev = dev; | |
1131 | init_timer(&dn_db->timer); | |
1132 | ||
1133 | dn_db->uptime = jiffies; | |
95743deb EB |
1134 | |
1135 | dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table); | |
1136 | if (!dn_db->neigh_parms) { | |
1137 | dev->dn_ptr = NULL; | |
1138 | kfree(dn_db); | |
1139 | return NULL; | |
1140 | } | |
1141 | ||
1da177e4 LT |
1142 | if (dn_db->parms.up) { |
1143 | if (dn_db->parms.up(dev) < 0) { | |
95743deb | 1144 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
1da177e4 LT |
1145 | dev->dn_ptr = NULL; |
1146 | kfree(dn_db); | |
1147 | return NULL; | |
1148 | } | |
1149 | } | |
1150 | ||
1da177e4 LT |
1151 | dn_dev_sysctl_register(dev, &dn_db->parms); |
1152 | ||
1153 | dn_dev_set_timer(dev); | |
1154 | ||
1155 | *err = 0; | |
1156 | return dn_db; | |
1157 | } | |
1158 | ||
1159 | ||
1160 | /* | |
1161 | * This processes a device up event. We only start up | |
1162 | * the loopback device & ethernet devices with correct | |
1163 | * MAC addreses automatically. Others must be started | |
1164 | * specifically. | |
1165 | * | |
1166 | * FIXME: How should we configure the loopback address ? If we could dispense | |
1167 | * with using decnet_address here and for autobind, it will be one less thing | |
1168 | * for users to worry about setting up. | |
1169 | */ | |
1170 | ||
1171 | void dn_dev_up(struct net_device *dev) | |
1172 | { | |
1173 | struct dn_ifaddr *ifa; | |
c4ea94ab | 1174 | __le16 addr = decnet_address; |
1da177e4 LT |
1175 | int maybe_default = 0; |
1176 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; | |
1177 | ||
1178 | if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) | |
1179 | return; | |
1180 | ||
1181 | /* | |
1182 | * Need to ensure that loopback device has a dn_db attached to it | |
1183 | * to allow creation of neighbours against it, even though it might | |
1184 | * not have a local address of its own. Might as well do the same for | |
1185 | * all autoconfigured interfaces. | |
1186 | */ | |
1187 | if (dn_db == NULL) { | |
1188 | int err; | |
1189 | dn_db = dn_dev_create(dev, &err); | |
1190 | if (dn_db == NULL) | |
1191 | return; | |
1192 | } | |
1193 | ||
1194 | if (dev->type == ARPHRD_ETHER) { | |
1195 | if (memcmp(dev->dev_addr, dn_hiord, 4) != 0) | |
1196 | return; | |
c4ea94ab | 1197 | addr = dn_eth2dn(dev->dev_addr); |
1da177e4 LT |
1198 | maybe_default = 1; |
1199 | } | |
1200 | ||
1201 | if (addr == 0) | |
1202 | return; | |
1203 | ||
1204 | if ((ifa = dn_dev_alloc_ifa()) == NULL) | |
1205 | return; | |
1206 | ||
1207 | ifa->ifa_local = ifa->ifa_address = addr; | |
1208 | ifa->ifa_flags = 0; | |
1209 | ifa->ifa_scope = RT_SCOPE_UNIVERSE; | |
1210 | strcpy(ifa->ifa_label, dev->name); | |
1211 | ||
1212 | dn_dev_set_ifa(dev, ifa); | |
1213 | ||
1214 | /* | |
1215 | * Automagically set the default device to the first automatically | |
1216 | * configured ethernet card in the system. | |
1217 | */ | |
1218 | if (maybe_default) { | |
1219 | dev_hold(dev); | |
1220 | if (dn_dev_set_default(dev, 0)) | |
1221 | dev_put(dev); | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | static void dn_dev_delete(struct net_device *dev) | |
1226 | { | |
1227 | struct dn_dev *dn_db = dev->dn_ptr; | |
1228 | ||
1229 | if (dn_db == NULL) | |
1230 | return; | |
1231 | ||
1232 | del_timer_sync(&dn_db->timer); | |
1233 | dn_dev_sysctl_unregister(&dn_db->parms); | |
1234 | dn_dev_check_default(dev); | |
1235 | neigh_ifdown(&dn_neigh_table, dev); | |
1236 | ||
1237 | if (dn_db->parms.down) | |
1238 | dn_db->parms.down(dev); | |
1239 | ||
1240 | dev->dn_ptr = NULL; | |
1241 | ||
1242 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); | |
1243 | neigh_ifdown(&dn_neigh_table, dev); | |
1244 | ||
1245 | if (dn_db->router) | |
1246 | neigh_release(dn_db->router); | |
1247 | if (dn_db->peer) | |
1248 | neigh_release(dn_db->peer); | |
1249 | ||
1250 | kfree(dn_db); | |
1251 | } | |
1252 | ||
1253 | void dn_dev_down(struct net_device *dev) | |
1254 | { | |
1255 | struct dn_dev *dn_db = dev->dn_ptr; | |
1256 | struct dn_ifaddr *ifa; | |
1257 | ||
1258 | if (dn_db == NULL) | |
1259 | return; | |
1260 | ||
1261 | while((ifa = dn_db->ifa_list) != NULL) { | |
1262 | dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0); | |
1263 | dn_dev_free_ifa(ifa); | |
1264 | } | |
1265 | ||
1266 | dn_dev_delete(dev); | |
1267 | } | |
1268 | ||
1269 | void dn_dev_init_pkt(struct sk_buff *skb) | |
1270 | { | |
1271 | return; | |
1272 | } | |
1273 | ||
1274 | void dn_dev_veri_pkt(struct sk_buff *skb) | |
1275 | { | |
1276 | return; | |
1277 | } | |
1278 | ||
1279 | void dn_dev_hello(struct sk_buff *skb) | |
1280 | { | |
1281 | return; | |
1282 | } | |
1283 | ||
1284 | void dn_dev_devices_off(void) | |
1285 | { | |
1286 | struct net_device *dev; | |
1287 | ||
1288 | rtnl_lock(); | |
881d966b | 1289 | for_each_netdev(&init_net, dev) |
1da177e4 LT |
1290 | dn_dev_down(dev); |
1291 | rtnl_unlock(); | |
1292 | ||
1293 | } | |
1294 | ||
1295 | void dn_dev_devices_on(void) | |
1296 | { | |
1297 | struct net_device *dev; | |
1298 | ||
1299 | rtnl_lock(); | |
881d966b | 1300 | for_each_netdev(&init_net, dev) { |
1da177e4 LT |
1301 | if (dev->flags & IFF_UP) |
1302 | dn_dev_up(dev); | |
1303 | } | |
1304 | rtnl_unlock(); | |
1305 | } | |
1306 | ||
1307 | int register_dnaddr_notifier(struct notifier_block *nb) | |
1308 | { | |
e041c683 | 1309 | return blocking_notifier_chain_register(&dnaddr_chain, nb); |
1da177e4 LT |
1310 | } |
1311 | ||
1312 | int unregister_dnaddr_notifier(struct notifier_block *nb) | |
1313 | { | |
e041c683 | 1314 | return blocking_notifier_chain_unregister(&dnaddr_chain, nb); |
1da177e4 LT |
1315 | } |
1316 | ||
1317 | #ifdef CONFIG_PROC_FS | |
7562f876 | 1318 | static inline int is_dn_dev(struct net_device *dev) |
1da177e4 | 1319 | { |
7562f876 | 1320 | return dev->dn_ptr != NULL; |
1da177e4 LT |
1321 | } |
1322 | ||
7562f876 | 1323 | static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos) |
8521c27e | 1324 | __acquires(&dev_base_lock) |
1da177e4 | 1325 | { |
7562f876 | 1326 | int i; |
1da177e4 LT |
1327 | struct net_device *dev; |
1328 | ||
7562f876 | 1329 | read_lock(&dev_base_lock); |
1da177e4 | 1330 | |
7562f876 PE |
1331 | if (*pos == 0) |
1332 | return SEQ_START_TOKEN; | |
1333 | ||
1334 | i = 1; | |
881d966b | 1335 | for_each_netdev(&init_net, dev) { |
7562f876 PE |
1336 | if (!is_dn_dev(dev)) |
1337 | continue; | |
1338 | ||
1339 | if (i++ == *pos) | |
1340 | return dev; | |
1da177e4 | 1341 | } |
7562f876 PE |
1342 | |
1343 | return NULL; | |
1da177e4 LT |
1344 | } |
1345 | ||
1346 | static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1347 | { | |
7562f876 | 1348 | struct net_device *dev; |
1da177e4 | 1349 | |
1da177e4 | 1350 | ++*pos; |
7562f876 PE |
1351 | |
1352 | dev = (struct net_device *)v; | |
1353 | if (v == SEQ_START_TOKEN) | |
881d966b | 1354 | dev = net_device_entry(&init_net.dev_base_head); |
7562f876 | 1355 | |
881d966b | 1356 | for_each_netdev_continue(&init_net, dev) { |
7562f876 PE |
1357 | if (!is_dn_dev(dev)) |
1358 | continue; | |
1359 | ||
1360 | return dev; | |
1361 | } | |
1362 | ||
1363 | return NULL; | |
1da177e4 LT |
1364 | } |
1365 | ||
1366 | static void dn_dev_seq_stop(struct seq_file *seq, void *v) | |
8521c27e | 1367 | __releases(&dev_base_lock) |
1da177e4 | 1368 | { |
7562f876 | 1369 | read_unlock(&dev_base_lock); |
1da177e4 LT |
1370 | } |
1371 | ||
1372 | static char *dn_type2asc(char type) | |
1373 | { | |
1374 | switch(type) { | |
1375 | case DN_DEV_BCAST: | |
1376 | return "B"; | |
1377 | case DN_DEV_UCAST: | |
1378 | return "U"; | |
1379 | case DN_DEV_MPOINT: | |
1380 | return "M"; | |
1381 | } | |
1382 | ||
1383 | return "?"; | |
1384 | } | |
1385 | ||
1386 | static int dn_dev_seq_show(struct seq_file *seq, void *v) | |
1387 | { | |
1388 | if (v == SEQ_START_TOKEN) | |
429eb0fa | 1389 | seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n"); |
1da177e4 LT |
1390 | else { |
1391 | struct net_device *dev = v; | |
1392 | char peer_buf[DN_ASCBUF_LEN]; | |
1393 | char router_buf[DN_ASCBUF_LEN]; | |
1394 | struct dn_dev *dn_db = dev->dn_ptr; | |
1395 | ||
429eb0fa | 1396 | seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu" |
1da177e4 | 1397 | " %04hu %03d %02x %-10s %-7s %-7s\n", |
429eb0fa YH |
1398 | dev->name ? dev->name : "???", |
1399 | dn_type2asc(dn_db->parms.mode), | |
1400 | 0, 0, | |
1da177e4 LT |
1401 | dn_db->t3, dn_db->parms.t3, |
1402 | mtu2blksize(dev), | |
1403 | dn_db->parms.priority, | |
1404 | dn_db->parms.state, dn_db->parms.name, | |
c4106aa8 HH |
1405 | dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "", |
1406 | dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : ""); | |
1da177e4 LT |
1407 | } |
1408 | return 0; | |
1409 | } | |
1410 | ||
56b3d975 | 1411 | static const struct seq_operations dn_dev_seq_ops = { |
1da177e4 LT |
1412 | .start = dn_dev_seq_start, |
1413 | .next = dn_dev_seq_next, | |
1414 | .stop = dn_dev_seq_stop, | |
1415 | .show = dn_dev_seq_show, | |
1416 | }; | |
1417 | ||
1418 | static int dn_dev_seq_open(struct inode *inode, struct file *file) | |
1419 | { | |
1420 | return seq_open(file, &dn_dev_seq_ops); | |
1421 | } | |
1422 | ||
9a32144e | 1423 | static const struct file_operations dn_dev_seq_fops = { |
1da177e4 LT |
1424 | .owner = THIS_MODULE, |
1425 | .open = dn_dev_seq_open, | |
1426 | .read = seq_read, | |
1427 | .llseek = seq_lseek, | |
1428 | .release = seq_release, | |
1429 | }; | |
1430 | ||
1431 | #endif /* CONFIG_PROC_FS */ | |
1432 | ||
4e058063 | 1433 | static int addr[2]; |
1da177e4 LT |
1434 | module_param_array(addr, int, NULL, 0444); |
1435 | MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node"); | |
1436 | ||
1437 | void __init dn_dev_init(void) | |
1438 | { | |
429eb0fa YH |
1439 | if (addr[0] > 63 || addr[0] < 0) { |
1440 | printk(KERN_ERR "DECnet: Area must be between 0 and 63"); | |
1441 | return; | |
1442 | } | |
1da177e4 | 1443 | |
429eb0fa YH |
1444 | if (addr[1] > 1023 || addr[1] < 0) { |
1445 | printk(KERN_ERR "DECnet: Node must be between 0 and 1023"); | |
1446 | return; | |
1447 | } | |
1da177e4 | 1448 | |
c4106aa8 | 1449 | decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]); |
1da177e4 LT |
1450 | |
1451 | dn_dev_devices_on(); | |
1452 | ||
fa34ddd7 TG |
1453 | rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL); |
1454 | rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL); | |
1455 | rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr); | |
1da177e4 | 1456 | |
457c4cbc | 1457 | proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops); |
1da177e4 LT |
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 | ||
1468 | void __exit dn_dev_cleanup(void) | |
1469 | { | |
1da177e4 LT |
1470 | #ifdef CONFIG_SYSCTL |
1471 | { | |
1472 | int i; | |
1473 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) | |
1474 | dn_dev_sysctl_unregister(&dn_dev_list[i]); | |
1475 | } | |
1476 | #endif /* CONFIG_SYSCTL */ | |
1477 | ||
457c4cbc | 1478 | proc_net_remove(&init_net, "decnet_dev"); |
1da177e4 LT |
1479 | |
1480 | dn_dev_devices_off(); | |
1481 | } |