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> | |
45 | #include <net/neighbour.h> | |
46 | #include <net/dst.h> | |
47 | #include <net/flow.h> | |
a8731cbf | 48 | #include <net/fib_rules.h> |
a6f01cac | 49 | #include <net/netlink.h> |
1da177e4 LT |
50 | #include <net/dn.h> |
51 | #include <net/dn_dev.h> | |
52 | #include <net/dn_route.h> | |
53 | #include <net/dn_neigh.h> | |
54 | #include <net/dn_fib.h> | |
55 | ||
56 | #define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn)) | |
57 | ||
58 | static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00}; | |
59 | static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00}; | |
60 | static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00}; | |
61 | static unsigned char dn_eco_version[3] = {0x02,0x00,0x00}; | |
62 | ||
63 | extern struct neigh_table dn_neigh_table; | |
64 | ||
65 | /* | |
66 | * decnet_address is kept in network order. | |
67 | */ | |
c4ea94ab | 68 | __le16 decnet_address = 0; |
1da177e4 LT |
69 | |
70 | static DEFINE_RWLOCK(dndev_lock); | |
71 | static struct net_device *decnet_default_device; | |
e041c683 | 72 | static BLOCKING_NOTIFIER_HEAD(dnaddr_chain); |
1da177e4 LT |
73 | |
74 | static struct dn_dev *dn_dev_create(struct net_device *dev, int *err); | |
75 | static void dn_dev_delete(struct net_device *dev); | |
b020b942 | 76 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa); |
1da177e4 LT |
77 | |
78 | static int dn_eth_up(struct net_device *); | |
79 | static void dn_eth_down(struct net_device *); | |
80 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa); | |
81 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa); | |
82 | ||
83 | static struct dn_dev_parms dn_dev_list[] = { | |
84 | { | |
85 | .type = ARPHRD_ETHER, /* Ethernet */ | |
86 | .mode = DN_DEV_BCAST, | |
87 | .state = DN_DEV_S_RU, | |
88 | .t2 = 1, | |
89 | .t3 = 10, | |
90 | .name = "ethernet", | |
91 | .ctl_name = NET_DECNET_CONF_ETHER, | |
92 | .up = dn_eth_up, | |
93 | .down = dn_eth_down, | |
94 | .timer3 = dn_send_brd_hello, | |
95 | }, | |
96 | { | |
97 | .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */ | |
98 | .mode = DN_DEV_BCAST, | |
99 | .state = DN_DEV_S_RU, | |
100 | .t2 = 1, | |
101 | .t3 = 10, | |
102 | .name = "ipgre", | |
103 | .ctl_name = NET_DECNET_CONF_GRE, | |
104 | .timer3 = dn_send_brd_hello, | |
105 | }, | |
106 | #if 0 | |
107 | { | |
108 | .type = ARPHRD_X25, /* Bog standard X.25 */ | |
109 | .mode = DN_DEV_UCAST, | |
110 | .state = DN_DEV_S_DS, | |
111 | .t2 = 1, | |
112 | .t3 = 120, | |
113 | .name = "x25", | |
114 | .ctl_name = NET_DECNET_CONF_X25, | |
115 | .timer3 = dn_send_ptp_hello, | |
116 | }, | |
117 | #endif | |
118 | #if 0 | |
119 | { | |
120 | .type = ARPHRD_PPP, /* DECnet over PPP */ | |
121 | .mode = DN_DEV_BCAST, | |
122 | .state = DN_DEV_S_RU, | |
123 | .t2 = 1, | |
124 | .t3 = 10, | |
125 | .name = "ppp", | |
126 | .ctl_name = NET_DECNET_CONF_PPP, | |
127 | .timer3 = dn_send_brd_hello, | |
128 | }, | |
129 | #endif | |
130 | { | |
131 | .type = ARPHRD_DDCMP, /* DECnet over DDCMP */ | |
132 | .mode = DN_DEV_UCAST, | |
133 | .state = DN_DEV_S_DS, | |
134 | .t2 = 1, | |
135 | .t3 = 120, | |
136 | .name = "ddcmp", | |
137 | .ctl_name = NET_DECNET_CONF_DDCMP, | |
138 | .timer3 = dn_send_ptp_hello, | |
139 | }, | |
140 | { | |
141 | .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */ | |
142 | .mode = DN_DEV_BCAST, | |
143 | .state = DN_DEV_S_RU, | |
144 | .t2 = 1, | |
145 | .t3 = 10, | |
146 | .name = "loopback", | |
147 | .ctl_name = NET_DECNET_CONF_LOOPBACK, | |
148 | .timer3 = dn_send_brd_hello, | |
149 | } | |
150 | }; | |
151 | ||
152 | #define DN_DEV_LIST_SIZE (sizeof(dn_dev_list)/sizeof(struct dn_dev_parms)) | |
153 | ||
154 | #define DN_DEV_PARMS_OFFSET(x) ((int) ((char *) &((struct dn_dev_parms *)0)->x)) | |
155 | ||
156 | #ifdef CONFIG_SYSCTL | |
157 | ||
158 | static int min_t2[] = { 1 }; | |
159 | static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */ | |
160 | static int min_t3[] = { 1 }; | |
161 | static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */ | |
162 | ||
163 | static int min_priority[1]; | |
164 | static int max_priority[] = { 127 }; /* From DECnet spec */ | |
165 | ||
166 | static int dn_forwarding_proc(ctl_table *, int, struct file *, | |
167 | void __user *, size_t *, loff_t *); | |
168 | static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen, | |
169 | void __user *oldval, size_t __user *oldlenp, | |
1f29bcd7 | 170 | void __user *newval, size_t newlen); |
1da177e4 LT |
171 | |
172 | static struct dn_dev_sysctl_table { | |
173 | struct ctl_table_header *sysctl_header; | |
174 | ctl_table dn_dev_vars[5]; | |
175 | ctl_table dn_dev_dev[2]; | |
176 | ctl_table dn_dev_conf_dir[2]; | |
177 | ctl_table dn_dev_proto_dir[2]; | |
178 | ctl_table dn_dev_root_dir[2]; | |
179 | } dn_dev_sysctl = { | |
180 | NULL, | |
181 | { | |
182 | { | |
183 | .ctl_name = NET_DECNET_CONF_DEV_FORWARDING, | |
184 | .procname = "forwarding", | |
185 | .data = (void *)DN_DEV_PARMS_OFFSET(forwarding), | |
186 | .maxlen = sizeof(int), | |
187 | .mode = 0644, | |
188 | .proc_handler = dn_forwarding_proc, | |
189 | .strategy = dn_forwarding_sysctl, | |
190 | }, | |
191 | { | |
192 | .ctl_name = NET_DECNET_CONF_DEV_PRIORITY, | |
193 | .procname = "priority", | |
194 | .data = (void *)DN_DEV_PARMS_OFFSET(priority), | |
195 | .maxlen = sizeof(int), | |
196 | .mode = 0644, | |
197 | .proc_handler = proc_dointvec_minmax, | |
198 | .strategy = sysctl_intvec, | |
199 | .extra1 = &min_priority, | |
200 | .extra2 = &max_priority | |
201 | }, | |
202 | { | |
203 | .ctl_name = NET_DECNET_CONF_DEV_T2, | |
204 | .procname = "t2", | |
205 | .data = (void *)DN_DEV_PARMS_OFFSET(t2), | |
206 | .maxlen = sizeof(int), | |
207 | .mode = 0644, | |
208 | .proc_handler = proc_dointvec_minmax, | |
209 | .strategy = sysctl_intvec, | |
210 | .extra1 = &min_t2, | |
211 | .extra2 = &max_t2 | |
212 | }, | |
213 | { | |
214 | .ctl_name = NET_DECNET_CONF_DEV_T3, | |
215 | .procname = "t3", | |
216 | .data = (void *)DN_DEV_PARMS_OFFSET(t3), | |
217 | .maxlen = sizeof(int), | |
218 | .mode = 0644, | |
219 | .proc_handler = proc_dointvec_minmax, | |
220 | .strategy = sysctl_intvec, | |
221 | .extra1 = &min_t3, | |
222 | .extra2 = &max_t3 | |
223 | }, | |
224 | {0} | |
225 | }, | |
226 | {{ | |
429eb0fa YH |
227 | .ctl_name = 0, |
228 | .procname = "", | |
229 | .mode = 0555, | |
1da177e4 LT |
230 | .child = dn_dev_sysctl.dn_dev_vars |
231 | }, {0}}, | |
232 | {{ | |
233 | .ctl_name = NET_DECNET_CONF, | |
429eb0fa YH |
234 | .procname = "conf", |
235 | .mode = 0555, | |
1da177e4 LT |
236 | .child = dn_dev_sysctl.dn_dev_dev |
237 | }, {0}}, | |
238 | {{ | |
429eb0fa YH |
239 | .ctl_name = NET_DECNET, |
240 | .procname = "decnet", | |
241 | .mode = 0555, | |
1da177e4 LT |
242 | .child = dn_dev_sysctl.dn_dev_conf_dir |
243 | }, {0}}, | |
244 | {{ | |
429eb0fa YH |
245 | .ctl_name = CTL_NET, |
246 | .procname = "net", | |
247 | .mode = 0555, | |
1da177e4 LT |
248 | .child = dn_dev_sysctl.dn_dev_proto_dir |
249 | }, {0}} | |
250 | }; | |
251 | ||
252 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) | |
253 | { | |
254 | struct dn_dev_sysctl_table *t; | |
255 | int i; | |
256 | ||
c66b721a | 257 | t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 LT |
258 | if (t == NULL) |
259 | return; | |
260 | ||
1da177e4 LT |
261 | for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) { |
262 | long offset = (long)t->dn_dev_vars[i].data; | |
263 | t->dn_dev_vars[i].data = ((char *)parms) + offset; | |
1da177e4 LT |
264 | } |
265 | ||
266 | if (dev) { | |
267 | t->dn_dev_dev[0].procname = dev->name; | |
268 | t->dn_dev_dev[0].ctl_name = dev->ifindex; | |
269 | } else { | |
270 | t->dn_dev_dev[0].procname = parms->name; | |
271 | t->dn_dev_dev[0].ctl_name = parms->ctl_name; | |
272 | } | |
273 | ||
274 | t->dn_dev_dev[0].child = t->dn_dev_vars; | |
1da177e4 | 275 | t->dn_dev_conf_dir[0].child = t->dn_dev_dev; |
1da177e4 | 276 | t->dn_dev_proto_dir[0].child = t->dn_dev_conf_dir; |
1da177e4 | 277 | t->dn_dev_root_dir[0].child = t->dn_dev_proto_dir; |
1da177e4 LT |
278 | t->dn_dev_vars[0].extra1 = (void *)dev; |
279 | ||
0b4d4147 | 280 | t->sysctl_header = register_sysctl_table(t->dn_dev_root_dir); |
1da177e4 LT |
281 | if (t->sysctl_header == NULL) |
282 | kfree(t); | |
283 | else | |
284 | parms->sysctl = t; | |
285 | } | |
286 | ||
287 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) | |
288 | { | |
289 | if (parms->sysctl) { | |
290 | struct dn_dev_sysctl_table *t = parms->sysctl; | |
291 | parms->sysctl = NULL; | |
292 | unregister_sysctl_table(t->sysctl_header); | |
293 | kfree(t); | |
294 | } | |
295 | } | |
296 | ||
429eb0fa | 297 | static int dn_forwarding_proc(ctl_table *table, int write, |
1da177e4 LT |
298 | struct file *filep, |
299 | void __user *buffer, | |
300 | size_t *lenp, loff_t *ppos) | |
301 | { | |
302 | #ifdef CONFIG_DECNET_ROUTER | |
303 | struct net_device *dev = table->extra1; | |
304 | struct dn_dev *dn_db; | |
305 | int err; | |
306 | int tmp, old; | |
307 | ||
308 | if (table->extra1 == NULL) | |
309 | return -EINVAL; | |
310 | ||
311 | dn_db = dev->dn_ptr; | |
312 | old = dn_db->parms.forwarding; | |
313 | ||
314 | err = proc_dointvec(table, write, filep, buffer, lenp, ppos); | |
315 | ||
316 | if ((err >= 0) && write) { | |
317 | if (dn_db->parms.forwarding < 0) | |
318 | dn_db->parms.forwarding = 0; | |
319 | if (dn_db->parms.forwarding > 2) | |
320 | dn_db->parms.forwarding = 2; | |
321 | /* | |
322 | * What an ugly hack this is... its works, just. It | |
323 | * would be nice if sysctl/proc were just that little | |
324 | * bit more flexible so I don't have to write a special | |
325 | * routine, or suffer hacks like this - SJW | |
326 | */ | |
327 | tmp = dn_db->parms.forwarding; | |
328 | dn_db->parms.forwarding = old; | |
329 | if (dn_db->parms.down) | |
330 | dn_db->parms.down(dev); | |
331 | dn_db->parms.forwarding = tmp; | |
332 | if (dn_db->parms.up) | |
333 | dn_db->parms.up(dev); | |
334 | } | |
335 | ||
336 | return err; | |
337 | #else | |
338 | return -EINVAL; | |
339 | #endif | |
340 | } | |
341 | ||
342 | static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen, | |
343 | void __user *oldval, size_t __user *oldlenp, | |
1f29bcd7 | 344 | void __user *newval, size_t newlen) |
1da177e4 LT |
345 | { |
346 | #ifdef CONFIG_DECNET_ROUTER | |
347 | struct net_device *dev = table->extra1; | |
348 | struct dn_dev *dn_db; | |
349 | int value; | |
350 | ||
351 | if (table->extra1 == NULL) | |
352 | return -EINVAL; | |
353 | ||
354 | dn_db = dev->dn_ptr; | |
355 | ||
356 | if (newval && newlen) { | |
357 | if (newlen != sizeof(int)) | |
358 | return -EINVAL; | |
359 | ||
360 | if (get_user(value, (int __user *)newval)) | |
361 | return -EFAULT; | |
362 | if (value < 0) | |
363 | return -EINVAL; | |
364 | if (value > 2) | |
365 | return -EINVAL; | |
366 | ||
367 | if (dn_db->parms.down) | |
368 | dn_db->parms.down(dev); | |
369 | dn_db->parms.forwarding = value; | |
370 | if (dn_db->parms.up) | |
371 | dn_db->parms.up(dev); | |
372 | } | |
373 | ||
374 | return 0; | |
375 | #else | |
376 | return -EINVAL; | |
377 | #endif | |
378 | } | |
379 | ||
380 | #else /* CONFIG_SYSCTL */ | |
381 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) | |
382 | { | |
383 | } | |
384 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) | |
385 | { | |
386 | } | |
387 | ||
388 | #endif /* CONFIG_SYSCTL */ | |
389 | ||
390 | static inline __u16 mtu2blksize(struct net_device *dev) | |
391 | { | |
392 | u32 blksize = dev->mtu; | |
393 | if (blksize > 0xffff) | |
394 | blksize = 0xffff; | |
395 | ||
396 | if (dev->type == ARPHRD_ETHER || | |
397 | dev->type == ARPHRD_PPP || | |
398 | dev->type == ARPHRD_IPGRE || | |
399 | dev->type == ARPHRD_LOOPBACK) | |
400 | blksize -= 2; | |
401 | ||
402 | return (__u16)blksize; | |
403 | } | |
404 | ||
405 | static struct dn_ifaddr *dn_dev_alloc_ifa(void) | |
406 | { | |
407 | struct dn_ifaddr *ifa; | |
408 | ||
0da974f4 | 409 | ifa = kzalloc(sizeof(*ifa), GFP_KERNEL); |
1da177e4 LT |
410 | |
411 | return ifa; | |
412 | } | |
413 | ||
414 | static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa) | |
415 | { | |
416 | kfree(ifa); | |
417 | } | |
418 | ||
419 | static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy) | |
420 | { | |
421 | struct dn_ifaddr *ifa1 = *ifap; | |
422 | unsigned char mac_addr[6]; | |
423 | struct net_device *dev = dn_db->dev; | |
424 | ||
425 | ASSERT_RTNL(); | |
426 | ||
427 | *ifap = ifa1->ifa_next; | |
428 | ||
429 | if (dn_db->dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 430 | if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 LT |
431 | dn_dn2eth(mac_addr, ifa1->ifa_local); |
432 | dev_mc_delete(dev, mac_addr, ETH_ALEN, 0); | |
433 | } | |
434 | } | |
435 | ||
b020b942 | 436 | dn_ifaddr_notify(RTM_DELADDR, ifa1); |
e041c683 | 437 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1); |
1da177e4 LT |
438 | if (destroy) { |
439 | dn_dev_free_ifa(ifa1); | |
440 | ||
441 | if (dn_db->ifa_list == NULL) | |
442 | dn_dev_delete(dn_db->dev); | |
443 | } | |
444 | } | |
445 | ||
446 | static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
447 | { | |
448 | struct net_device *dev = dn_db->dev; | |
449 | struct dn_ifaddr *ifa1; | |
450 | unsigned char mac_addr[6]; | |
451 | ||
452 | ASSERT_RTNL(); | |
453 | ||
429eb0fa | 454 | /* Check for duplicates */ |
1da177e4 LT |
455 | for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) { |
456 | if (ifa1->ifa_local == ifa->ifa_local) | |
457 | return -EEXIST; | |
458 | } | |
459 | ||
460 | if (dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 461 | if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 LT |
462 | dn_dn2eth(mac_addr, ifa->ifa_local); |
463 | dev_mc_add(dev, mac_addr, ETH_ALEN, 0); | |
464 | dev_mc_upload(dev); | |
465 | } | |
466 | } | |
467 | ||
468 | ifa->ifa_next = dn_db->ifa_list; | |
469 | dn_db->ifa_list = ifa; | |
470 | ||
b020b942 | 471 | dn_ifaddr_notify(RTM_NEWADDR, ifa); |
e041c683 | 472 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
473 | |
474 | return 0; | |
475 | } | |
476 | ||
477 | static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa) | |
478 | { | |
479 | struct dn_dev *dn_db = dev->dn_ptr; | |
480 | int rv; | |
481 | ||
482 | if (dn_db == NULL) { | |
483 | int err; | |
484 | dn_db = dn_dev_create(dev, &err); | |
485 | if (dn_db == NULL) | |
486 | return err; | |
487 | } | |
488 | ||
489 | ifa->ifa_dev = dn_db; | |
490 | ||
491 | if (dev->flags & IFF_LOOPBACK) | |
492 | ifa->ifa_scope = RT_SCOPE_HOST; | |
493 | ||
494 | rv = dn_dev_insert_ifa(dn_db, ifa); | |
495 | if (rv) | |
496 | dn_dev_free_ifa(ifa); | |
497 | return rv; | |
498 | } | |
499 | ||
500 | ||
501 | int dn_dev_ioctl(unsigned int cmd, void __user *arg) | |
502 | { | |
503 | char buffer[DN_IFREQ_SIZE]; | |
504 | struct ifreq *ifr = (struct ifreq *)buffer; | |
505 | struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr; | |
506 | struct dn_dev *dn_db; | |
507 | struct net_device *dev; | |
508 | struct dn_ifaddr *ifa = NULL, **ifap = NULL; | |
509 | int ret = 0; | |
510 | ||
511 | if (copy_from_user(ifr, arg, DN_IFREQ_SIZE)) | |
512 | return -EFAULT; | |
513 | ifr->ifr_name[IFNAMSIZ-1] = 0; | |
514 | ||
515 | #ifdef CONFIG_KMOD | |
516 | dev_load(ifr->ifr_name); | |
517 | #endif | |
518 | ||
519 | switch(cmd) { | |
520 | case SIOCGIFADDR: | |
521 | break; | |
522 | case SIOCSIFADDR: | |
523 | if (!capable(CAP_NET_ADMIN)) | |
524 | return -EACCES; | |
525 | if (sdn->sdn_family != AF_DECnet) | |
526 | return -EINVAL; | |
527 | break; | |
528 | default: | |
529 | return -EINVAL; | |
530 | } | |
531 | ||
532 | rtnl_lock(); | |
533 | ||
534 | if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL) { | |
535 | ret = -ENODEV; | |
536 | goto done; | |
537 | } | |
538 | ||
539 | if ((dn_db = dev->dn_ptr) != NULL) { | |
540 | for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next) | |
541 | if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0) | |
542 | break; | |
543 | } | |
544 | ||
545 | if (ifa == NULL && cmd != SIOCSIFADDR) { | |
546 | ret = -EADDRNOTAVAIL; | |
547 | goto done; | |
548 | } | |
549 | ||
550 | switch(cmd) { | |
551 | case SIOCGIFADDR: | |
c4ea94ab | 552 | *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local; |
1da177e4 LT |
553 | goto rarok; |
554 | ||
555 | case SIOCSIFADDR: | |
556 | if (!ifa) { | |
557 | if ((ifa = dn_dev_alloc_ifa()) == NULL) { | |
558 | ret = -ENOBUFS; | |
559 | break; | |
560 | } | |
561 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
562 | } else { | |
563 | if (ifa->ifa_local == dn_saddr2dn(sdn)) | |
564 | break; | |
565 | dn_dev_del_ifa(dn_db, ifap, 0); | |
566 | } | |
567 | ||
568 | ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn); | |
569 | ||
570 | ret = dn_dev_set_ifa(dev, ifa); | |
571 | } | |
572 | done: | |
573 | rtnl_unlock(); | |
574 | ||
575 | return ret; | |
576 | rarok: | |
577 | if (copy_to_user(arg, ifr, DN_IFREQ_SIZE)) | |
578 | ret = -EFAULT; | |
579 | goto done; | |
580 | } | |
581 | ||
582 | struct net_device *dn_dev_get_default(void) | |
583 | { | |
584 | struct net_device *dev; | |
585 | read_lock(&dndev_lock); | |
586 | dev = decnet_default_device; | |
587 | if (dev) { | |
588 | if (dev->dn_ptr) | |
589 | dev_hold(dev); | |
590 | else | |
591 | dev = NULL; | |
592 | } | |
593 | read_unlock(&dndev_lock); | |
594 | return dev; | |
595 | } | |
596 | ||
597 | int dn_dev_set_default(struct net_device *dev, int force) | |
598 | { | |
599 | struct net_device *old = NULL; | |
600 | int rv = -EBUSY; | |
601 | if (!dev->dn_ptr) | |
602 | return -ENODEV; | |
603 | write_lock(&dndev_lock); | |
604 | if (force || decnet_default_device == NULL) { | |
605 | old = decnet_default_device; | |
606 | decnet_default_device = dev; | |
607 | rv = 0; | |
608 | } | |
609 | write_unlock(&dndev_lock); | |
610 | if (old) | |
6a57b2ee | 611 | dev_put(old); |
1da177e4 LT |
612 | return rv; |
613 | } | |
614 | ||
615 | static void dn_dev_check_default(struct net_device *dev) | |
616 | { | |
617 | write_lock(&dndev_lock); | |
618 | if (dev == decnet_default_device) { | |
619 | decnet_default_device = NULL; | |
620 | } else { | |
621 | dev = NULL; | |
622 | } | |
623 | write_unlock(&dndev_lock); | |
624 | if (dev) | |
625 | dev_put(dev); | |
626 | } | |
627 | ||
628 | static struct dn_dev *dn_dev_by_index(int ifindex) | |
629 | { | |
630 | struct net_device *dev; | |
631 | struct dn_dev *dn_dev = NULL; | |
632 | dev = dev_get_by_index(ifindex); | |
633 | if (dev) { | |
634 | dn_dev = dev->dn_ptr; | |
635 | dev_put(dev); | |
636 | } | |
637 | ||
638 | return dn_dev; | |
639 | } | |
640 | ||
4a89c256 TG |
641 | static struct nla_policy dn_ifa_policy[IFA_MAX+1] __read_mostly = { |
642 | [IFA_ADDRESS] = { .type = NLA_U16 }, | |
643 | [IFA_LOCAL] = { .type = NLA_U16 }, | |
644 | [IFA_LABEL] = { .type = NLA_STRING, | |
645 | .len = IFNAMSIZ - 1 }, | |
646 | }; | |
647 | ||
648 | static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
1da177e4 | 649 | { |
4a89c256 | 650 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 | 651 | struct dn_dev *dn_db; |
4a89c256 | 652 | struct ifaddrmsg *ifm; |
1da177e4 | 653 | struct dn_ifaddr *ifa, **ifap; |
4a89c256 TG |
654 | int err = -EADDRNOTAVAIL; |
655 | ||
656 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); | |
657 | if (err < 0) | |
658 | goto errout; | |
1da177e4 | 659 | |
4a89c256 | 660 | ifm = nlmsg_data(nlh); |
1da177e4 | 661 | if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL) |
4a89c256 TG |
662 | goto errout; |
663 | ||
664 | for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) { | |
665 | if (tb[IFA_LOCAL] && | |
666 | nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2)) | |
667 | continue; | |
1da177e4 | 668 | |
4a89c256 | 669 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
1da177e4 LT |
670 | continue; |
671 | ||
672 | dn_dev_del_ifa(dn_db, ifap, 1); | |
673 | return 0; | |
674 | } | |
675 | ||
4a89c256 TG |
676 | errout: |
677 | return err; | |
1da177e4 LT |
678 | } |
679 | ||
4a89c256 | 680 | static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1da177e4 | 681 | { |
4a89c256 | 682 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 LT |
683 | struct net_device *dev; |
684 | struct dn_dev *dn_db; | |
4a89c256 | 685 | struct ifaddrmsg *ifm; |
1da177e4 | 686 | struct dn_ifaddr *ifa; |
4a89c256 TG |
687 | int err; |
688 | ||
689 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); | |
690 | if (err < 0) | |
691 | return err; | |
1da177e4 | 692 | |
4a89c256 | 693 | if (tb[IFA_LOCAL] == NULL) |
1da177e4 LT |
694 | return -EINVAL; |
695 | ||
4a89c256 | 696 | ifm = nlmsg_data(nlh); |
1da177e4 LT |
697 | if ((dev = __dev_get_by_index(ifm->ifa_index)) == NULL) |
698 | return -ENODEV; | |
699 | ||
700 | if ((dn_db = dev->dn_ptr) == NULL) { | |
701 | int err; | |
702 | dn_db = dn_dev_create(dev, &err); | |
703 | if (!dn_db) | |
704 | return err; | |
705 | } | |
429eb0fa | 706 | |
1da177e4 LT |
707 | if ((ifa = dn_dev_alloc_ifa()) == NULL) |
708 | return -ENOBUFS; | |
709 | ||
4a89c256 TG |
710 | if (tb[IFA_ADDRESS] == NULL) |
711 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; | |
712 | ||
713 | ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]); | |
714 | ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]); | |
1da177e4 LT |
715 | ifa->ifa_flags = ifm->ifa_flags; |
716 | ifa->ifa_scope = ifm->ifa_scope; | |
717 | ifa->ifa_dev = dn_db; | |
4a89c256 TG |
718 | |
719 | if (tb[IFA_LABEL]) | |
720 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); | |
1da177e4 LT |
721 | else |
722 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
723 | ||
4a89c256 TG |
724 | err = dn_dev_insert_ifa(dn_db, ifa); |
725 | if (err) | |
1da177e4 | 726 | dn_dev_free_ifa(ifa); |
4a89c256 TG |
727 | |
728 | return err; | |
1da177e4 LT |
729 | } |
730 | ||
a6f01cac TG |
731 | static inline size_t dn_ifaddr_nlmsg_size(void) |
732 | { | |
733 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) | |
734 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ | |
735 | + nla_total_size(2) /* IFA_ADDRESS */ | |
736 | + nla_total_size(2); /* IFA_LOCAL */ | |
737 | } | |
738 | ||
4a89c256 TG |
739 | static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa, |
740 | u32 pid, u32 seq, int event, unsigned int flags) | |
1da177e4 LT |
741 | { |
742 | struct ifaddrmsg *ifm; | |
743 | struct nlmsghdr *nlh; | |
1da177e4 | 744 | |
4a89c256 TG |
745 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags); |
746 | if (nlh == NULL) | |
26932566 | 747 | return -EMSGSIZE; |
1da177e4 | 748 | |
4a89c256 | 749 | ifm = nlmsg_data(nlh); |
1da177e4 LT |
750 | ifm->ifa_family = AF_DECnet; |
751 | ifm->ifa_prefixlen = 16; | |
752 | ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT; | |
753 | ifm->ifa_scope = ifa->ifa_scope; | |
754 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; | |
4a89c256 | 755 | |
1da177e4 | 756 | if (ifa->ifa_address) |
4a89c256 | 757 | NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address); |
1da177e4 | 758 | if (ifa->ifa_local) |
4a89c256 | 759 | NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local); |
1da177e4 | 760 | if (ifa->ifa_label[0]) |
4a89c256 | 761 | NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label); |
1da177e4 | 762 | |
4a89c256 TG |
763 | return nlmsg_end(skb, nlh); |
764 | ||
765 | nla_put_failure: | |
26932566 PM |
766 | nlmsg_cancel(skb, nlh); |
767 | return -EMSGSIZE; | |
1da177e4 LT |
768 | } |
769 | ||
b020b942 | 770 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa) |
1da177e4 LT |
771 | { |
772 | struct sk_buff *skb; | |
dc738dd8 | 773 | int err = -ENOBUFS; |
1da177e4 | 774 | |
a6f01cac | 775 | skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL); |
dc738dd8 TG |
776 | if (skb == NULL) |
777 | goto errout; | |
778 | ||
4a89c256 | 779 | err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
26932566 PM |
780 | if (err < 0) { |
781 | /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */ | |
782 | WARN_ON(err == -EMSGSIZE); | |
783 | kfree_skb(skb); | |
784 | goto errout; | |
785 | } | |
dc738dd8 TG |
786 | err = rtnl_notify(skb, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL); |
787 | errout: | |
788 | if (err < 0) | |
789 | rtnl_set_sk_err(RTNLGRP_DECnet_IFADDR, err); | |
1da177e4 LT |
790 | } |
791 | ||
4a89c256 | 792 | static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 793 | { |
4a89c256 | 794 | int idx, dn_idx = 0, skip_ndevs, skip_naddr; |
1da177e4 LT |
795 | struct net_device *dev; |
796 | struct dn_dev *dn_db; | |
797 | struct dn_ifaddr *ifa; | |
798 | ||
4a89c256 TG |
799 | skip_ndevs = cb->args[0]; |
800 | skip_naddr = cb->args[1]; | |
801 | ||
4a89c256 TG |
802 | for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) { |
803 | if (idx < skip_ndevs) | |
1da177e4 | 804 | continue; |
4a89c256 TG |
805 | else if (idx > skip_ndevs) { |
806 | /* Only skip over addresses for first dev dumped | |
807 | * in this iteration (idx == skip_ndevs) */ | |
808 | skip_naddr = 0; | |
809 | } | |
810 | ||
1da177e4 LT |
811 | if ((dn_db = dev->dn_ptr) == NULL) |
812 | continue; | |
813 | ||
4a89c256 TG |
814 | for (ifa = dn_db->ifa_list, dn_idx = 0; ifa; |
815 | ifa = ifa->ifa_next, dn_idx++) { | |
816 | if (dn_idx < skip_naddr) | |
1da177e4 LT |
817 | continue; |
818 | ||
4a89c256 TG |
819 | if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid, |
820 | cb->nlh->nlmsg_seq, RTM_NEWADDR, | |
821 | NLM_F_MULTI) < 0) | |
1da177e4 LT |
822 | goto done; |
823 | } | |
824 | } | |
825 | done: | |
1da177e4 LT |
826 | cb->args[0] = idx; |
827 | cb->args[1] = dn_idx; | |
828 | ||
829 | return skb->len; | |
830 | } | |
831 | ||
c4ea94ab | 832 | static int dn_dev_get_first(struct net_device *dev, __le16 *addr) |
1da177e4 LT |
833 | { |
834 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; | |
835 | struct dn_ifaddr *ifa; | |
836 | int rv = -ENODEV; | |
837 | if (dn_db == NULL) | |
838 | goto out; | |
839 | ifa = dn_db->ifa_list; | |
840 | if (ifa != NULL) { | |
841 | *addr = ifa->ifa_local; | |
842 | rv = 0; | |
843 | } | |
844 | out: | |
845 | return rv; | |
846 | } | |
847 | ||
429eb0fa | 848 | /* |
1da177e4 LT |
849 | * Find a default address to bind to. |
850 | * | |
851 | * This is one of those areas where the initial VMS concepts don't really | |
852 | * map onto the Linux concepts, and since we introduced multiple addresses | |
853 | * per interface we have to cope with slightly odd ways of finding out what | |
854 | * "our address" really is. Mostly it's not a problem; for this we just guess | |
855 | * a sensible default. Eventually the routing code will take care of all the | |
856 | * nasties for us I hope. | |
857 | */ | |
c4ea94ab | 858 | int dn_dev_bind_default(__le16 *addr) |
1da177e4 LT |
859 | { |
860 | struct net_device *dev; | |
861 | int rv; | |
862 | dev = dn_dev_get_default(); | |
863 | last_chance: | |
864 | if (dev) { | |
865 | read_lock(&dev_base_lock); | |
866 | rv = dn_dev_get_first(dev, addr); | |
867 | read_unlock(&dev_base_lock); | |
868 | dev_put(dev); | |
869 | if (rv == 0 || dev == &loopback_dev) | |
870 | return rv; | |
871 | } | |
872 | dev = &loopback_dev; | |
873 | dev_hold(dev); | |
874 | goto last_chance; | |
875 | } | |
876 | ||
877 | static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
878 | { | |
429eb0fa YH |
879 | struct endnode_hello_message *msg; |
880 | struct sk_buff *skb = NULL; | |
881 | __le16 *pktlen; | |
1da177e4 LT |
882 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; |
883 | ||
429eb0fa | 884 | if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
885 | return; |
886 | ||
429eb0fa | 887 | skb->dev = dev; |
1da177e4 | 888 | |
429eb0fa | 889 | msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg)); |
1da177e4 | 890 | |
429eb0fa YH |
891 | msg->msgflg = 0x0D; |
892 | memcpy(msg->tiver, dn_eco_version, 3); | |
1da177e4 | 893 | dn_dn2eth(msg->id, ifa->ifa_local); |
429eb0fa YH |
894 | msg->iinfo = DN_RT_INFO_ENDN; |
895 | msg->blksize = dn_htons(mtu2blksize(dev)); | |
896 | msg->area = 0x00; | |
897 | memset(msg->seed, 0, 8); | |
898 | memcpy(msg->neighbor, dn_hiord, ETH_ALEN); | |
1da177e4 LT |
899 | |
900 | if (dn_db->router) { | |
901 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; | |
902 | dn_dn2eth(msg->neighbor, dn->addr); | |
903 | } | |
904 | ||
429eb0fa YH |
905 | msg->timer = dn_htons((unsigned short)dn_db->parms.t3); |
906 | msg->mpd = 0x00; | |
907 | msg->datalen = 0x02; | |
908 | memset(msg->data, 0xAA, 2); | |
909 | ||
910 | pktlen = (__le16 *)skb_push(skb,2); | |
911 | *pktlen = dn_htons(skb->len - 2); | |
1da177e4 | 912 | |
c1d2bbe1 | 913 | skb_reset_network_header(skb); |
1da177e4 LT |
914 | |
915 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id); | |
916 | } | |
917 | ||
918 | ||
919 | #define DRDELAY (5 * HZ) | |
920 | ||
921 | static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
922 | { | |
923 | /* First check time since device went up */ | |
924 | if ((jiffies - dn_db->uptime) < DRDELAY) | |
925 | return 0; | |
926 | ||
927 | /* If there is no router, then yes... */ | |
928 | if (!dn_db->router) | |
929 | return 1; | |
930 | ||
931 | /* otherwise only if we have a higher priority or.. */ | |
932 | if (dn->priority < dn_db->parms.priority) | |
933 | return 1; | |
934 | ||
935 | /* if we have equal priority and a higher node number */ | |
936 | if (dn->priority != dn_db->parms.priority) | |
937 | return 0; | |
938 | ||
939 | if (dn_ntohs(dn->addr) < dn_ntohs(ifa->ifa_local)) | |
940 | return 1; | |
941 | ||
942 | return 0; | |
943 | } | |
944 | ||
945 | static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
946 | { | |
947 | int n; | |
948 | struct dn_dev *dn_db = dev->dn_ptr; | |
949 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; | |
950 | struct sk_buff *skb; | |
951 | size_t size; | |
952 | unsigned char *ptr; | |
953 | unsigned char *i1, *i2; | |
c4ea94ab | 954 | __le16 *pktlen; |
1da177e4 LT |
955 | char *src; |
956 | ||
957 | if (mtu2blksize(dev) < (26 + 7)) | |
958 | return; | |
959 | ||
960 | n = mtu2blksize(dev) - 26; | |
961 | n /= 7; | |
962 | ||
963 | if (n > 32) | |
964 | n = 32; | |
965 | ||
966 | size = 2 + 26 + 7 * n; | |
967 | ||
968 | if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL) | |
969 | return; | |
970 | ||
971 | skb->dev = dev; | |
972 | ptr = skb_put(skb, size); | |
973 | ||
974 | *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH; | |
975 | *ptr++ = 2; /* ECO */ | |
976 | *ptr++ = 0; | |
977 | *ptr++ = 0; | |
978 | dn_dn2eth(ptr, ifa->ifa_local); | |
979 | src = ptr; | |
980 | ptr += ETH_ALEN; | |
429eb0fa | 981 | *ptr++ = dn_db->parms.forwarding == 1 ? |
1da177e4 | 982 | DN_RT_INFO_L1RT : DN_RT_INFO_L2RT; |
c4ea94ab | 983 | *((__le16 *)ptr) = dn_htons(mtu2blksize(dev)); |
1da177e4 | 984 | ptr += 2; |
429eb0fa | 985 | *ptr++ = dn_db->parms.priority; /* Priority */ |
1da177e4 | 986 | *ptr++ = 0; /* Area: Reserved */ |
c4ea94ab | 987 | *((__le16 *)ptr) = dn_htons((unsigned short)dn_db->parms.t3); |
1da177e4 LT |
988 | ptr += 2; |
989 | *ptr++ = 0; /* MPD: Reserved */ | |
990 | i1 = ptr++; | |
991 | memset(ptr, 0, 7); /* Name: Reserved */ | |
992 | ptr += 7; | |
993 | i2 = ptr++; | |
994 | ||
995 | n = dn_neigh_elist(dev, ptr, n); | |
996 | ||
997 | *i2 = 7 * n; | |
998 | *i1 = 8 + *i2; | |
999 | ||
1000 | skb_trim(skb, (27 + *i2)); | |
1001 | ||
c4ea94ab | 1002 | pktlen = (__le16 *)skb_push(skb, 2); |
1da177e4 LT |
1003 | *pktlen = dn_htons(skb->len - 2); |
1004 | ||
c1d2bbe1 | 1005 | skb_reset_network_header(skb); |
1da177e4 LT |
1006 | |
1007 | if (dn_am_i_a_router(dn, dn_db, ifa)) { | |
1008 | struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); | |
1009 | if (skb2) { | |
1010 | dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src); | |
1011 | } | |
1012 | } | |
1013 | ||
1014 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
1015 | } | |
1016 | ||
1017 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
1018 | { | |
1019 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; | |
1020 | ||
1021 | if (dn_db->parms.forwarding == 0) | |
1022 | dn_send_endnode_hello(dev, ifa); | |
1023 | else | |
1024 | dn_send_router_hello(dev, ifa); | |
1025 | } | |
1026 | ||
1027 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
1028 | { | |
1029 | int tdlen = 16; | |
1030 | int size = dev->hard_header_len + 2 + 4 + tdlen; | |
1031 | struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC); | |
1032 | int i; | |
1033 | unsigned char *ptr; | |
1034 | char src[ETH_ALEN]; | |
1035 | ||
1036 | if (skb == NULL) | |
1037 | return ; | |
1038 | ||
1039 | skb->dev = dev; | |
1040 | skb_push(skb, dev->hard_header_len); | |
1041 | ptr = skb_put(skb, 2 + 4 + tdlen); | |
1042 | ||
1043 | *ptr++ = DN_RT_PKT_HELO; | |
c4ea94ab | 1044 | *((__le16 *)ptr) = ifa->ifa_local; |
1da177e4 LT |
1045 | ptr += 2; |
1046 | *ptr++ = tdlen; | |
1047 | ||
1048 | for(i = 0; i < tdlen; i++) | |
1049 | *ptr++ = 0252; | |
1050 | ||
1051 | dn_dn2eth(src, ifa->ifa_local); | |
1052 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
1053 | } | |
1054 | ||
1055 | static int dn_eth_up(struct net_device *dev) | |
1056 | { | |
1057 | struct dn_dev *dn_db = dev->dn_ptr; | |
1058 | ||
1059 | if (dn_db->parms.forwarding == 0) | |
1060 | dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0); | |
1061 | else | |
1062 | dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0); | |
1063 | ||
1064 | dev_mc_upload(dev); | |
1065 | ||
1066 | dn_db->use_long = 1; | |
1067 | ||
1068 | return 0; | |
1069 | } | |
1070 | ||
1071 | static void dn_eth_down(struct net_device *dev) | |
1072 | { | |
1073 | struct dn_dev *dn_db = dev->dn_ptr; | |
1074 | ||
1075 | if (dn_db->parms.forwarding == 0) | |
1076 | dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0); | |
1077 | else | |
1078 | dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0); | |
1079 | } | |
1080 | ||
1081 | static void dn_dev_set_timer(struct net_device *dev); | |
1082 | ||
1083 | static void dn_dev_timer_func(unsigned long arg) | |
1084 | { | |
1085 | struct net_device *dev = (struct net_device *)arg; | |
1086 | struct dn_dev *dn_db = dev->dn_ptr; | |
1087 | struct dn_ifaddr *ifa; | |
1088 | ||
1089 | if (dn_db->t3 <= dn_db->parms.t2) { | |
1090 | if (dn_db->parms.timer3) { | |
1091 | for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1092 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) | |
1093 | dn_db->parms.timer3(dev, ifa); | |
1094 | } | |
1095 | } | |
1096 | dn_db->t3 = dn_db->parms.t3; | |
1097 | } else { | |
1098 | dn_db->t3 -= dn_db->parms.t2; | |
1099 | } | |
1100 | ||
1101 | dn_dev_set_timer(dev); | |
1102 | } | |
1103 | ||
1104 | static void dn_dev_set_timer(struct net_device *dev) | |
1105 | { | |
1106 | struct dn_dev *dn_db = dev->dn_ptr; | |
1107 | ||
1108 | if (dn_db->parms.t2 > dn_db->parms.t3) | |
1109 | dn_db->parms.t2 = dn_db->parms.t3; | |
1110 | ||
1111 | dn_db->timer.data = (unsigned long)dev; | |
1112 | dn_db->timer.function = dn_dev_timer_func; | |
1113 | dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ); | |
1114 | ||
1115 | add_timer(&dn_db->timer); | |
1116 | } | |
1117 | ||
1118 | struct dn_dev *dn_dev_create(struct net_device *dev, int *err) | |
1119 | { | |
1120 | int i; | |
1121 | struct dn_dev_parms *p = dn_dev_list; | |
1122 | struct dn_dev *dn_db; | |
1123 | ||
1124 | for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) { | |
1125 | if (p->type == dev->type) | |
1126 | break; | |
1127 | } | |
1128 | ||
1129 | *err = -ENODEV; | |
1130 | if (i == DN_DEV_LIST_SIZE) | |
1131 | return NULL; | |
1132 | ||
1133 | *err = -ENOBUFS; | |
0da974f4 | 1134 | if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
1135 | return NULL; |
1136 | ||
1da177e4 LT |
1137 | memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms)); |
1138 | smp_wmb(); | |
1139 | dev->dn_ptr = dn_db; | |
1140 | dn_db->dev = dev; | |
1141 | init_timer(&dn_db->timer); | |
1142 | ||
1143 | dn_db->uptime = jiffies; | |
95743deb EB |
1144 | |
1145 | dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table); | |
1146 | if (!dn_db->neigh_parms) { | |
1147 | dev->dn_ptr = NULL; | |
1148 | kfree(dn_db); | |
1149 | return NULL; | |
1150 | } | |
1151 | ||
1da177e4 LT |
1152 | if (dn_db->parms.up) { |
1153 | if (dn_db->parms.up(dev) < 0) { | |
95743deb | 1154 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
1da177e4 LT |
1155 | dev->dn_ptr = NULL; |
1156 | kfree(dn_db); | |
1157 | return NULL; | |
1158 | } | |
1159 | } | |
1160 | ||
1da177e4 LT |
1161 | dn_dev_sysctl_register(dev, &dn_db->parms); |
1162 | ||
1163 | dn_dev_set_timer(dev); | |
1164 | ||
1165 | *err = 0; | |
1166 | return dn_db; | |
1167 | } | |
1168 | ||
1169 | ||
1170 | /* | |
1171 | * This processes a device up event. We only start up | |
1172 | * the loopback device & ethernet devices with correct | |
1173 | * MAC addreses automatically. Others must be started | |
1174 | * specifically. | |
1175 | * | |
1176 | * FIXME: How should we configure the loopback address ? If we could dispense | |
1177 | * with using decnet_address here and for autobind, it will be one less thing | |
1178 | * for users to worry about setting up. | |
1179 | */ | |
1180 | ||
1181 | void dn_dev_up(struct net_device *dev) | |
1182 | { | |
1183 | struct dn_ifaddr *ifa; | |
c4ea94ab | 1184 | __le16 addr = decnet_address; |
1da177e4 LT |
1185 | int maybe_default = 0; |
1186 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; | |
1187 | ||
1188 | if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) | |
1189 | return; | |
1190 | ||
1191 | /* | |
1192 | * Need to ensure that loopback device has a dn_db attached to it | |
1193 | * to allow creation of neighbours against it, even though it might | |
1194 | * not have a local address of its own. Might as well do the same for | |
1195 | * all autoconfigured interfaces. | |
1196 | */ | |
1197 | if (dn_db == NULL) { | |
1198 | int err; | |
1199 | dn_db = dn_dev_create(dev, &err); | |
1200 | if (dn_db == NULL) | |
1201 | return; | |
1202 | } | |
1203 | ||
1204 | if (dev->type == ARPHRD_ETHER) { | |
1205 | if (memcmp(dev->dev_addr, dn_hiord, 4) != 0) | |
1206 | return; | |
c4ea94ab | 1207 | addr = dn_eth2dn(dev->dev_addr); |
1da177e4 LT |
1208 | maybe_default = 1; |
1209 | } | |
1210 | ||
1211 | if (addr == 0) | |
1212 | return; | |
1213 | ||
1214 | if ((ifa = dn_dev_alloc_ifa()) == NULL) | |
1215 | return; | |
1216 | ||
1217 | ifa->ifa_local = ifa->ifa_address = addr; | |
1218 | ifa->ifa_flags = 0; | |
1219 | ifa->ifa_scope = RT_SCOPE_UNIVERSE; | |
1220 | strcpy(ifa->ifa_label, dev->name); | |
1221 | ||
1222 | dn_dev_set_ifa(dev, ifa); | |
1223 | ||
1224 | /* | |
1225 | * Automagically set the default device to the first automatically | |
1226 | * configured ethernet card in the system. | |
1227 | */ | |
1228 | if (maybe_default) { | |
1229 | dev_hold(dev); | |
1230 | if (dn_dev_set_default(dev, 0)) | |
1231 | dev_put(dev); | |
1232 | } | |
1233 | } | |
1234 | ||
1235 | static void dn_dev_delete(struct net_device *dev) | |
1236 | { | |
1237 | struct dn_dev *dn_db = dev->dn_ptr; | |
1238 | ||
1239 | if (dn_db == NULL) | |
1240 | return; | |
1241 | ||
1242 | del_timer_sync(&dn_db->timer); | |
1243 | dn_dev_sysctl_unregister(&dn_db->parms); | |
1244 | dn_dev_check_default(dev); | |
1245 | neigh_ifdown(&dn_neigh_table, dev); | |
1246 | ||
1247 | if (dn_db->parms.down) | |
1248 | dn_db->parms.down(dev); | |
1249 | ||
1250 | dev->dn_ptr = NULL; | |
1251 | ||
1252 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); | |
1253 | neigh_ifdown(&dn_neigh_table, dev); | |
1254 | ||
1255 | if (dn_db->router) | |
1256 | neigh_release(dn_db->router); | |
1257 | if (dn_db->peer) | |
1258 | neigh_release(dn_db->peer); | |
1259 | ||
1260 | kfree(dn_db); | |
1261 | } | |
1262 | ||
1263 | void dn_dev_down(struct net_device *dev) | |
1264 | { | |
1265 | struct dn_dev *dn_db = dev->dn_ptr; | |
1266 | struct dn_ifaddr *ifa; | |
1267 | ||
1268 | if (dn_db == NULL) | |
1269 | return; | |
1270 | ||
1271 | while((ifa = dn_db->ifa_list) != NULL) { | |
1272 | dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0); | |
1273 | dn_dev_free_ifa(ifa); | |
1274 | } | |
1275 | ||
1276 | dn_dev_delete(dev); | |
1277 | } | |
1278 | ||
1279 | void dn_dev_init_pkt(struct sk_buff *skb) | |
1280 | { | |
1281 | return; | |
1282 | } | |
1283 | ||
1284 | void dn_dev_veri_pkt(struct sk_buff *skb) | |
1285 | { | |
1286 | return; | |
1287 | } | |
1288 | ||
1289 | void dn_dev_hello(struct sk_buff *skb) | |
1290 | { | |
1291 | return; | |
1292 | } | |
1293 | ||
1294 | void dn_dev_devices_off(void) | |
1295 | { | |
1296 | struct net_device *dev; | |
1297 | ||
1298 | rtnl_lock(); | |
1299 | for(dev = dev_base; dev; dev = dev->next) | |
1300 | dn_dev_down(dev); | |
1301 | rtnl_unlock(); | |
1302 | ||
1303 | } | |
1304 | ||
1305 | void dn_dev_devices_on(void) | |
1306 | { | |
1307 | struct net_device *dev; | |
1308 | ||
1309 | rtnl_lock(); | |
1310 | for(dev = dev_base; dev; dev = dev->next) { | |
1311 | if (dev->flags & IFF_UP) | |
1312 | dn_dev_up(dev); | |
1313 | } | |
1314 | rtnl_unlock(); | |
1315 | } | |
1316 | ||
1317 | int register_dnaddr_notifier(struct notifier_block *nb) | |
1318 | { | |
e041c683 | 1319 | return blocking_notifier_chain_register(&dnaddr_chain, nb); |
1da177e4 LT |
1320 | } |
1321 | ||
1322 | int unregister_dnaddr_notifier(struct notifier_block *nb) | |
1323 | { | |
e041c683 | 1324 | return blocking_notifier_chain_unregister(&dnaddr_chain, nb); |
1da177e4 LT |
1325 | } |
1326 | ||
1327 | #ifdef CONFIG_PROC_FS | |
1328 | static inline struct net_device *dn_dev_get_next(struct seq_file *seq, struct net_device *dev) | |
1329 | { | |
1330 | do { | |
1331 | dev = dev->next; | |
1332 | } while(dev && !dev->dn_ptr); | |
1333 | ||
1334 | return dev; | |
1335 | } | |
1336 | ||
1337 | static struct net_device *dn_dev_get_idx(struct seq_file *seq, loff_t pos) | |
1338 | { | |
1339 | struct net_device *dev; | |
1340 | ||
1341 | dev = dev_base; | |
1342 | if (dev && !dev->dn_ptr) | |
1343 | dev = dn_dev_get_next(seq, dev); | |
1344 | if (pos) { | |
1345 | while(dev && (dev = dn_dev_get_next(seq, dev))) | |
1346 | --pos; | |
1347 | } | |
1348 | return dev; | |
1349 | } | |
1350 | ||
1351 | static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos) | |
1352 | { | |
1353 | if (*pos) { | |
1354 | struct net_device *dev; | |
1355 | read_lock(&dev_base_lock); | |
1356 | dev = dn_dev_get_idx(seq, *pos - 1); | |
1357 | if (dev == NULL) | |
1358 | read_unlock(&dev_base_lock); | |
1359 | return dev; | |
1360 | } | |
1361 | return SEQ_START_TOKEN; | |
1362 | } | |
1363 | ||
1364 | static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1365 | { | |
1366 | struct net_device *dev = v; | |
1367 | loff_t one = 1; | |
1368 | ||
1369 | if (v == SEQ_START_TOKEN) { | |
1370 | dev = dn_dev_seq_start(seq, &one); | |
1371 | } else { | |
1372 | dev = dn_dev_get_next(seq, dev); | |
1373 | if (dev == NULL) | |
1374 | read_unlock(&dev_base_lock); | |
1375 | } | |
1376 | ++*pos; | |
1377 | return dev; | |
1378 | } | |
1379 | ||
1380 | static void dn_dev_seq_stop(struct seq_file *seq, void *v) | |
1381 | { | |
1382 | if (v && v != SEQ_START_TOKEN) | |
1383 | read_unlock(&dev_base_lock); | |
1384 | } | |
1385 | ||
1386 | static char *dn_type2asc(char type) | |
1387 | { | |
1388 | switch(type) { | |
1389 | case DN_DEV_BCAST: | |
1390 | return "B"; | |
1391 | case DN_DEV_UCAST: | |
1392 | return "U"; | |
1393 | case DN_DEV_MPOINT: | |
1394 | return "M"; | |
1395 | } | |
1396 | ||
1397 | return "?"; | |
1398 | } | |
1399 | ||
1400 | static int dn_dev_seq_show(struct seq_file *seq, void *v) | |
1401 | { | |
1402 | if (v == SEQ_START_TOKEN) | |
429eb0fa | 1403 | seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n"); |
1da177e4 LT |
1404 | else { |
1405 | struct net_device *dev = v; | |
1406 | char peer_buf[DN_ASCBUF_LEN]; | |
1407 | char router_buf[DN_ASCBUF_LEN]; | |
1408 | struct dn_dev *dn_db = dev->dn_ptr; | |
1409 | ||
429eb0fa | 1410 | seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu" |
1da177e4 | 1411 | " %04hu %03d %02x %-10s %-7s %-7s\n", |
429eb0fa YH |
1412 | dev->name ? dev->name : "???", |
1413 | dn_type2asc(dn_db->parms.mode), | |
1414 | 0, 0, | |
1da177e4 LT |
1415 | dn_db->t3, dn_db->parms.t3, |
1416 | mtu2blksize(dev), | |
1417 | dn_db->parms.priority, | |
1418 | dn_db->parms.state, dn_db->parms.name, | |
c4ea94ab SW |
1419 | dn_db->router ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->router->primary_key), router_buf) : "", |
1420 | dn_db->peer ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->peer->primary_key), peer_buf) : ""); | |
1da177e4 LT |
1421 | } |
1422 | return 0; | |
1423 | } | |
1424 | ||
1425 | static struct seq_operations dn_dev_seq_ops = { | |
1426 | .start = dn_dev_seq_start, | |
1427 | .next = dn_dev_seq_next, | |
1428 | .stop = dn_dev_seq_stop, | |
1429 | .show = dn_dev_seq_show, | |
1430 | }; | |
1431 | ||
1432 | static int dn_dev_seq_open(struct inode *inode, struct file *file) | |
1433 | { | |
1434 | return seq_open(file, &dn_dev_seq_ops); | |
1435 | } | |
1436 | ||
9a32144e | 1437 | static const struct file_operations dn_dev_seq_fops = { |
1da177e4 LT |
1438 | .owner = THIS_MODULE, |
1439 | .open = dn_dev_seq_open, | |
1440 | .read = seq_read, | |
1441 | .llseek = seq_lseek, | |
1442 | .release = seq_release, | |
1443 | }; | |
1444 | ||
1445 | #endif /* CONFIG_PROC_FS */ | |
1446 | ||
1da177e4 LT |
1447 | static int __initdata addr[2]; |
1448 | module_param_array(addr, int, NULL, 0444); | |
1449 | MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node"); | |
1450 | ||
1451 | void __init dn_dev_init(void) | |
1452 | { | |
429eb0fa YH |
1453 | if (addr[0] > 63 || addr[0] < 0) { |
1454 | printk(KERN_ERR "DECnet: Area must be between 0 and 63"); | |
1455 | return; | |
1456 | } | |
1da177e4 | 1457 | |
429eb0fa YH |
1458 | if (addr[1] > 1023 || addr[1] < 0) { |
1459 | printk(KERN_ERR "DECnet: Node must be between 0 and 1023"); | |
1460 | return; | |
1461 | } | |
1da177e4 | 1462 | |
429eb0fa | 1463 | decnet_address = dn_htons((addr[0] << 10) | addr[1]); |
1da177e4 LT |
1464 | |
1465 | dn_dev_devices_on(); | |
1466 | ||
fa34ddd7 TG |
1467 | rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL); |
1468 | rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL); | |
1469 | rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr); | |
1da177e4 LT |
1470 | |
1471 | proc_net_fops_create("decnet_dev", S_IRUGO, &dn_dev_seq_fops); | |
1472 | ||
1473 | #ifdef CONFIG_SYSCTL | |
1474 | { | |
1475 | int i; | |
1476 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) | |
1477 | dn_dev_sysctl_register(NULL, &dn_dev_list[i]); | |
1478 | } | |
1479 | #endif /* CONFIG_SYSCTL */ | |
1480 | } | |
1481 | ||
1482 | void __exit dn_dev_cleanup(void) | |
1483 | { | |
1da177e4 LT |
1484 | #ifdef CONFIG_SYSCTL |
1485 | { | |
1486 | int i; | |
1487 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) | |
1488 | dn_dev_sysctl_unregister(&dn_dev_list[i]); | |
1489 | } | |
1490 | #endif /* CONFIG_SYSCTL */ | |
1491 | ||
1492 | proc_net_remove("decnet_dev"); | |
1493 | ||
1494 | dn_dev_devices_off(); | |
1495 | } |