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1e892191d0ec95203b65b601e16be25a2e5762d3
[project/netifd.git] / device.c
1 /*
2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14 #include <string.h>
15 #include <stdlib.h>
16 #include <stdio.h>
17 #include <assert.h>
18
19 #include <sys/types.h>
20 #include <sys/socket.h>
21
22 #include <libubox/list.h>
23
24 #include "netifd.h"
25 #include "system.h"
26 #include "config.h"
27 #include "wireless.h"
28
29 static struct list_head devtypes = LIST_HEAD_INIT(devtypes);
30 static struct avl_tree devices;
31
32 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
33 [DEV_ATTR_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
34 [DEV_ATTR_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
35 [DEV_ATTR_MTU6] = { .name = "mtu6", .type = BLOBMSG_TYPE_INT32 },
36 [DEV_ATTR_MACADDR] = { .name = "macaddr", .type = BLOBMSG_TYPE_STRING },
37 [DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
38 [DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
39 [DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
40 [DEV_ATTR_IP6SEGMENTROUTING] = { .name = "ip6segmentrouting", .type = BLOBMSG_TYPE_BOOL },
41 [DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
42 [DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
43 [DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
44 [DEV_ATTR_IGMPVERSION] = { .name = "igmpversion", .type = BLOBMSG_TYPE_INT32 },
45 [DEV_ATTR_MLDVERSION] = { .name = "mldversion", .type = BLOBMSG_TYPE_INT32 },
46 [DEV_ATTR_NEIGHREACHABLETIME] = { .name = "neighreachabletime", .type = BLOBMSG_TYPE_INT32 },
47 [DEV_ATTR_NEIGHGCSTALETIME] = { .name = "neighgcstaletime", .type = BLOBMSG_TYPE_INT32 },
48 [DEV_ATTR_DADTRANSMITS] = { .name = "dadtransmits", .type = BLOBMSG_TYPE_INT32 },
49 [DEV_ATTR_MULTICAST_TO_UNICAST] = { .name = "multicast_to_unicast", .type = BLOBMSG_TYPE_BOOL },
50 [DEV_ATTR_MULTICAST_ROUTER] = { .name = "multicast_router", .type = BLOBMSG_TYPE_INT32 },
51 [DEV_ATTR_MULTICAST_FAST_LEAVE] = { .name = "multicast_fast_leave", . type = BLOBMSG_TYPE_BOOL },
52 [DEV_ATTR_MULTICAST] = { .name ="multicast", .type = BLOBMSG_TYPE_BOOL },
53 [DEV_ATTR_LEARNING] = { .name ="learning", .type = BLOBMSG_TYPE_BOOL },
54 [DEV_ATTR_UNICAST_FLOOD] = { .name ="unicast_flood", .type = BLOBMSG_TYPE_BOOL },
55 [DEV_ATTR_SENDREDIRECTS] = { .name = "sendredirects", .type = BLOBMSG_TYPE_BOOL },
56 [DEV_ATTR_NEIGHLOCKTIME] = { .name = "neighlocktime", .type = BLOBMSG_TYPE_INT32 },
57 [DEV_ATTR_ISOLATE] = { .name = "isolate", .type = BLOBMSG_TYPE_BOOL },
58 [DEV_ATTR_DROP_V4_UNICAST_IN_L2_MULTICAST] = { .name = "drop_v4_unicast_in_l2_multicast", .type = BLOBMSG_TYPE_BOOL },
59 [DEV_ATTR_DROP_V6_UNICAST_IN_L2_MULTICAST] = { .name = "drop_v6_unicast_in_l2_multicast", .type = BLOBMSG_TYPE_BOOL },
60 [DEV_ATTR_DROP_GRATUITOUS_ARP] = { .name = "drop_gratuitous_arp", .type = BLOBMSG_TYPE_BOOL },
61 [DEV_ATTR_DROP_UNSOLICITED_NA] = { .name = "drop_unsolicited_na", .type = BLOBMSG_TYPE_BOOL },
62 [DEV_ATTR_ARP_ACCEPT] = { .name = "arp_accept", .type = BLOBMSG_TYPE_BOOL },
63 [DEV_ATTR_AUTH] = { .name = "auth", .type = BLOBMSG_TYPE_BOOL },
64 [DEV_ATTR_SPEED] = { .name = "speed", .type = BLOBMSG_TYPE_INT32 },
65 [DEV_ATTR_DUPLEX] = { .name = "duplex", .type = BLOBMSG_TYPE_BOOL },
66 };
67
68 const struct uci_blob_param_list device_attr_list = {
69 .n_params = __DEV_ATTR_MAX,
70 .params = dev_attrs,
71 };
72
73 static int __devlock = 0;
74
75 int device_type_add(struct device_type *devtype)
76 {
77 if (device_type_get(devtype->name)) {
78 netifd_log_message(L_WARNING, "Device handler '%s' already exists\n",
79 devtype->name);
80 return 1;
81 }
82
83 netifd_log_message(L_NOTICE, "Added device handler type: %s\n",
84 devtype->name);
85
86 list_add(&devtype->list, &devtypes);
87 return 0;
88 }
89
90 struct device_type *
91 device_type_get(const char *tname)
92 {
93 struct device_type *cur;
94
95 list_for_each_entry(cur, &devtypes, list)
96 if (!strcmp(cur->name, tname))
97 return cur;
98
99 return NULL;
100 }
101
102 static int device_vlan_len(struct kvlist *kv, const void *data)
103 {
104 return sizeof(unsigned int);
105 }
106
107 void device_vlan_update(bool done)
108 {
109 struct device *dev;
110
111 avl_for_each_element(&devices, dev, avl) {
112 if (!dev->vlans.update)
113 continue;
114
115 if (!done) {
116 if (dev->vlan_aliases.get_len)
117 kvlist_free(&dev->vlan_aliases);
118 else
119 kvlist_init(&dev->vlan_aliases, device_vlan_len);
120 vlist_update(&dev->vlans);
121 } else {
122 vlist_flush(&dev->vlans);
123
124 if (dev->type->vlan_update)
125 dev->type->vlan_update(dev);
126 }
127 }
128 }
129
130 void device_stp_init(void)
131 {
132 struct device *dev;
133
134 avl_for_each_element(&devices, dev, avl) {
135 if (!dev->type->stp_init)
136 continue;
137
138 dev->type->stp_init(dev);
139 }
140 }
141
142 static int set_device_state(struct device *dev, bool state)
143 {
144 if (state) {
145 /* Get ifindex for all devices being enabled so a valid */
146 /* ifindex is in place avoiding possible race conditions */
147 device_set_ifindex(dev, system_if_resolve(dev));
148 if (!dev->ifindex)
149 return -1;
150
151 system_if_get_settings(dev, &dev->orig_settings);
152 /* Only keep orig settings based on what needs to be set */
153 dev->orig_settings.valid_flags = dev->orig_settings.flags;
154 dev->orig_settings.flags &= dev->settings.flags;
155 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
156
157 system_if_up(dev);
158 } else {
159 system_if_down(dev);
160 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
161 }
162
163 return 0;
164 }
165
166 static int
167 simple_device_set_state(struct device *dev, bool state)
168 {
169 struct device *pdev;
170 int ret = 0;
171
172 pdev = dev->parent.dev;
173 if (state && !pdev) {
174 pdev = system_if_get_parent(dev);
175 if (pdev)
176 device_add_user(&dev->parent, pdev);
177 }
178
179 if (pdev) {
180 if (state)
181 ret = device_claim(&dev->parent);
182 else
183 device_release(&dev->parent);
184
185 if (ret < 0)
186 return ret;
187 }
188 return set_device_state(dev, state);
189 }
190
191 static struct device *
192 simple_device_create(const char *name, struct device_type *devtype,
193 struct blob_attr *attr)
194 {
195 struct blob_attr *tb[__DEV_ATTR_MAX];
196 struct device *dev = NULL;
197
198 /* device type is unused for simple devices */
199 devtype = NULL;
200
201 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
202 dev = device_get(name, true);
203 if (!dev)
204 return NULL;
205
206 dev->set_state = simple_device_set_state;
207 device_init_settings(dev, tb);
208
209 return dev;
210 }
211
212 static void simple_device_free(struct device *dev)
213 {
214 if (dev->parent.dev)
215 device_remove_user(&dev->parent);
216 free(dev);
217 }
218
219 struct device_type simple_device_type = {
220 .name = "Network device",
221 .config_params = &device_attr_list,
222
223 .create = simple_device_create,
224 .check_state = system_if_check,
225 .free = simple_device_free,
226 };
227
228 void
229 device_merge_settings(struct device *dev, struct device_settings *n)
230 {
231 struct device_settings *os = &dev->orig_settings;
232 struct device_settings *s = &dev->settings;
233
234 memset(n, 0, sizeof(*n));
235 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
236 n->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
237 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
238 s->txqueuelen : os->txqueuelen;
239 memcpy(n->macaddr,
240 (s->flags & (DEV_OPT_MACADDR|DEV_OPT_DEFAULT_MACADDR) ? s->macaddr : os->macaddr),
241 sizeof(n->macaddr));
242 n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
243 n->ip6segmentrouting = s->flags & DEV_OPT_IP6SEGMENTROUTING ? s->ip6segmentrouting : os->ip6segmentrouting;
244 n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
245 n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
246 n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
247 n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
248 n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
249 n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
250 s->neigh4reachabletime : os->neigh4reachabletime;
251 n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
252 s->neigh6reachabletime : os->neigh6reachabletime;
253 n->neigh4gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
254 s->neigh4gcstaletime : os->neigh4gcstaletime;
255 n->neigh6gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
256 s->neigh6gcstaletime : os->neigh6gcstaletime;
257 n->neigh4locktime = s->flags & DEV_OPT_NEIGHLOCKTIME ?
258 s->neigh4locktime : os->neigh4locktime;
259 n->dadtransmits = s->flags & DEV_OPT_DADTRANSMITS ?
260 s->dadtransmits : os->dadtransmits;
261 n->multicast = s->flags & DEV_OPT_MULTICAST ?
262 s->multicast : os->multicast;
263 n->multicast_to_unicast = s->multicast_to_unicast;
264 n->multicast_router = s->multicast_router;
265 n->multicast_fast_leave = s->multicast_fast_leave;
266 n->learning = s->learning;
267 n->unicast_flood = s->unicast_flood;
268 n->sendredirects = s->flags & DEV_OPT_SENDREDIRECTS ?
269 s->sendredirects : os->sendredirects;
270 n->drop_v4_unicast_in_l2_multicast = s->flags & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST ?
271 s->drop_v4_unicast_in_l2_multicast : os->drop_v4_unicast_in_l2_multicast;
272 n->drop_v6_unicast_in_l2_multicast = s->flags & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST ?
273 s->drop_v6_unicast_in_l2_multicast : os->drop_v6_unicast_in_l2_multicast;
274 n->drop_gratuitous_arp = s->flags & DEV_OPT_DROP_GRATUITOUS_ARP ?
275 s->drop_gratuitous_arp : os->drop_gratuitous_arp;
276 n->drop_unsolicited_na = s->flags & DEV_OPT_DROP_UNSOLICITED_NA ?
277 s->drop_unsolicited_na : os->drop_unsolicited_na;
278 n->arp_accept = s->flags & DEV_OPT_ARP_ACCEPT ?
279 s->arp_accept : os->arp_accept;
280 n->auth = s->flags & DEV_OPT_AUTH ? s->auth : os->auth;
281 n->speed = s->flags & DEV_OPT_SPEED ? s->speed : os->speed;
282 n->duplex = s->flags & DEV_OPT_DUPLEX ? s->duplex : os->duplex;
283 n->flags = s->flags | os->flags | os->valid_flags;
284 }
285
286 void
287 device_init_settings(struct device *dev, struct blob_attr **tb)
288 {
289 struct device_settings *s = &dev->settings;
290 struct blob_attr *cur;
291 struct ether_addr *ea;
292 bool disabled = false;
293
294 s->flags = 0;
295 if ((cur = tb[DEV_ATTR_ENABLED]))
296 disabled = !blobmsg_get_bool(cur);
297
298 if ((cur = tb[DEV_ATTR_MTU]) && blobmsg_get_u32(cur) >= 68) {
299 s->mtu = blobmsg_get_u32(cur);
300 s->flags |= DEV_OPT_MTU;
301 }
302
303 if ((cur = tb[DEV_ATTR_MTU6]) && blobmsg_get_u32(cur) >= 1280) {
304 s->mtu6 = blobmsg_get_u32(cur);
305 s->flags |= DEV_OPT_MTU6;
306 }
307
308 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
309 s->txqueuelen = blobmsg_get_u32(cur);
310 s->flags |= DEV_OPT_TXQUEUELEN;
311 }
312
313 if ((cur = tb[DEV_ATTR_MACADDR])) {
314 ea = ether_aton(blobmsg_data(cur));
315 if (ea) {
316 memcpy(s->macaddr, ea, 6);
317 s->flags |= DEV_OPT_MACADDR;
318 }
319 }
320
321 if ((cur = tb[DEV_ATTR_IPV6])) {
322 s->ipv6 = blobmsg_get_bool(cur);
323 s->flags |= DEV_OPT_IPV6;
324 }
325
326 if ((cur = tb[DEV_ATTR_IP6SEGMENTROUTING])) {
327 s->ip6segmentrouting = blobmsg_get_bool(cur);
328 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
329 }
330
331 if ((cur = tb[DEV_ATTR_PROMISC])) {
332 s->promisc = blobmsg_get_bool(cur);
333 s->flags |= DEV_OPT_PROMISC;
334 }
335
336 if ((cur = tb[DEV_ATTR_RPFILTER])) {
337 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
338 s->flags |= DEV_OPT_RPFILTER;
339 else
340 DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
341 }
342
343 if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
344 s->acceptlocal = blobmsg_get_bool(cur);
345 s->flags |= DEV_OPT_ACCEPTLOCAL;
346 }
347
348 if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
349 s->igmpversion = blobmsg_get_u32(cur);
350 if (s->igmpversion >= 1 && s->igmpversion <= 3)
351 s->flags |= DEV_OPT_IGMPVERSION;
352 else
353 DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
354 }
355
356 if ((cur = tb[DEV_ATTR_MLDVERSION])) {
357 s->mldversion = blobmsg_get_u32(cur);
358 if (s->mldversion >= 1 && s->mldversion <= 2)
359 s->flags |= DEV_OPT_MLDVERSION;
360 else
361 DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
362 }
363
364 if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
365 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
366 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
367 }
368
369 if ((cur = tb[DEV_ATTR_NEIGHGCSTALETIME])) {
370 s->neigh6gcstaletime = s->neigh4gcstaletime = blobmsg_get_u32(cur);
371 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
372 }
373
374 if ((cur = tb[DEV_ATTR_NEIGHLOCKTIME])) {
375 s->neigh4locktime = blobmsg_get_u32(cur);
376 s->flags |= DEV_OPT_NEIGHLOCKTIME;
377 }
378
379 if ((cur = tb[DEV_ATTR_DADTRANSMITS])) {
380 s->dadtransmits = blobmsg_get_u32(cur);
381 s->flags |= DEV_OPT_DADTRANSMITS;
382 }
383
384 if ((cur = tb[DEV_ATTR_MULTICAST_TO_UNICAST])) {
385 s->multicast_to_unicast = blobmsg_get_bool(cur);
386 s->flags |= DEV_OPT_MULTICAST_TO_UNICAST;
387 }
388
389 if ((cur = tb[DEV_ATTR_MULTICAST_ROUTER])) {
390 s->multicast_router = blobmsg_get_u32(cur);
391 if (s->multicast_router <= 2)
392 s->flags |= DEV_OPT_MULTICAST_ROUTER;
393 else
394 DPRINTF("Invalid value: %d - (Use 0: never, 1: learn, 2: always)\n", blobmsg_get_u32(cur));
395 }
396
397 if ((cur = tb[DEV_ATTR_MULTICAST_FAST_LEAVE])) {
398 s->multicast_fast_leave = blobmsg_get_bool(cur);
399 s->flags |= DEV_OPT_MULTICAST_FAST_LEAVE;
400 }
401
402 if ((cur = tb[DEV_ATTR_MULTICAST])) {
403 s->multicast = blobmsg_get_bool(cur);
404 s->flags |= DEV_OPT_MULTICAST;
405 }
406
407 if ((cur = tb[DEV_ATTR_LEARNING])) {
408 s->learning = blobmsg_get_bool(cur);
409 s->flags |= DEV_OPT_LEARNING;
410 }
411
412 if ((cur = tb[DEV_ATTR_UNICAST_FLOOD])) {
413 s->unicast_flood = blobmsg_get_bool(cur);
414 s->flags |= DEV_OPT_UNICAST_FLOOD;
415 }
416
417 if ((cur = tb[DEV_ATTR_SENDREDIRECTS])) {
418 s->sendredirects = blobmsg_get_bool(cur);
419 s->flags |= DEV_OPT_SENDREDIRECTS;
420 }
421
422 if ((cur = tb[DEV_ATTR_ISOLATE])) {
423 s->isolate = blobmsg_get_bool(cur);
424 s->flags |= DEV_OPT_ISOLATE;
425 }
426
427 if ((cur = tb[DEV_ATTR_DROP_V4_UNICAST_IN_L2_MULTICAST])) {
428 s->drop_v4_unicast_in_l2_multicast = blobmsg_get_bool(cur);
429 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
430 }
431
432 if ((cur = tb[DEV_ATTR_DROP_V6_UNICAST_IN_L2_MULTICAST])) {
433 s->drop_v6_unicast_in_l2_multicast = blobmsg_get_bool(cur);
434 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
435 }
436
437 if ((cur = tb[DEV_ATTR_DROP_GRATUITOUS_ARP])) {
438 s->drop_gratuitous_arp = blobmsg_get_bool(cur);
439 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
440 }
441
442 if ((cur = tb[DEV_ATTR_DROP_UNSOLICITED_NA])) {
443 s->drop_unsolicited_na = blobmsg_get_bool(cur);
444 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
445 }
446
447 if ((cur = tb[DEV_ATTR_ARP_ACCEPT])) {
448 s->arp_accept = blobmsg_get_bool(cur);
449 s->flags |= DEV_OPT_ARP_ACCEPT;
450 }
451
452 if ((cur = tb[DEV_ATTR_AUTH])) {
453 s->auth = blobmsg_get_bool(cur);
454 s->flags |= DEV_OPT_AUTH;
455 }
456
457 if ((cur = tb[DEV_ATTR_SPEED])) {
458 s->speed = blobmsg_get_u32(cur);
459 s->flags |= DEV_OPT_SPEED;
460 }
461
462 if ((cur = tb[DEV_ATTR_DUPLEX])) {
463 s->duplex = blobmsg_get_bool(cur);
464 s->flags |= DEV_OPT_DUPLEX;
465 }
466
467 device_set_disabled(dev, disabled);
468 }
469
470 static void __init dev_init(void)
471 {
472 avl_init(&devices, avl_strcmp, true, NULL);
473 }
474
475 static int device_release_cb(void *ctx, struct safe_list *list)
476 {
477 struct device_user *dep = container_of(list, struct device_user, list);
478
479 if (!dep->dev || !dep->claimed)
480 return 0;
481
482 device_release(dep);
483 return 0;
484 }
485
486 static int device_broadcast_cb(void *ctx, struct safe_list *list)
487 {
488 struct device_user *dep = container_of(list, struct device_user, list);
489 int *ev = ctx;
490
491 /* device might have been removed by an earlier callback */
492 if (!dep->dev)
493 return 0;
494
495 if (dep->cb)
496 dep->cb(dep, *ev);
497 return 0;
498 }
499
500 void device_broadcast_event(struct device *dev, enum device_event ev)
501 {
502 int dev_ev = ev;
503
504 safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
505 safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
506 }
507
508 static void
509 device_fill_default_settings(struct device *dev)
510 {
511 struct device_settings *s = &dev->settings;
512 struct ether_addr *ea;
513
514 if (!(s->flags & DEV_OPT_MACADDR)) {
515 ea = config_get_default_macaddr(dev->ifname);
516 if (ea) {
517 memcpy(s->macaddr, ea, 6);
518 s->flags |= DEV_OPT_DEFAULT_MACADDR;
519 }
520 }
521 }
522
523 int device_claim(struct device_user *dep)
524 {
525 struct device *dev = dep->dev;
526 int ret = 0;
527
528 if (dep->claimed)
529 return 0;
530
531 if (!dev)
532 return -1;
533
534 dep->claimed = true;
535 D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
536 if (++dev->active != 1)
537 return 0;
538
539 device_broadcast_event(dev, DEV_EVENT_SETUP);
540 device_fill_default_settings(dev);
541 if (dev->external) {
542 /* Get ifindex for external claimed devices so a valid */
543 /* ifindex is in place avoiding possible race conditions */
544 device_set_ifindex(dev, system_if_resolve(dev));
545 if (!dev->ifindex)
546 ret = -1;
547
548 system_if_get_settings(dev, &dev->orig_settings);
549 } else
550 ret = dev->set_state(dev, true);
551
552 if (ret == 0)
553 device_broadcast_event(dev, DEV_EVENT_UP);
554 else {
555 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
556 dev->active = 0;
557 dep->claimed = false;
558 }
559
560 return ret;
561 }
562
563 void device_release(struct device_user *dep)
564 {
565 struct device *dev = dep->dev;
566
567 if (!dep->claimed)
568 return;
569
570 dep->claimed = false;
571 dev->active--;
572 D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
573 assert(dev->active >= 0);
574
575 if (dev->active)
576 return;
577
578 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
579 if (!dev->external)
580 dev->set_state(dev, false);
581
582 if (dev->active)
583 return;
584
585 device_broadcast_event(dev, DEV_EVENT_DOWN);
586 }
587
588 int device_check_state(struct device *dev)
589 {
590 if (!dev->type->check_state)
591 return simple_device_type.check_state(dev);
592
593 return dev->type->check_state(dev);
594 }
595
596 int device_init_virtual(struct device *dev, struct device_type *type, const char *name)
597 {
598 assert(dev);
599 assert(type);
600
601 D(DEVICE, "Initialize device '%s'\n", name ? name : "");
602 INIT_SAFE_LIST(&dev->users);
603 INIT_SAFE_LIST(&dev->aliases);
604 dev->type = type;
605
606 if (name) {
607 int ret;
608
609 ret = device_set_ifname(dev, name);
610 if (ret < 0)
611 return ret;
612 }
613
614 if (!dev->set_state)
615 dev->set_state = set_device_state;
616
617 return 0;
618 }
619
620 int device_init(struct device *dev, struct device_type *type, const char *ifname)
621 {
622 int ret;
623
624 ret = device_init_virtual(dev, type, ifname);
625 if (ret < 0)
626 return ret;
627
628 dev->avl.key = dev->ifname;
629
630 ret = avl_insert(&devices, &dev->avl);
631 if (ret < 0)
632 return ret;
633
634 system_if_clear_state(dev);
635
636 return 0;
637 }
638
639 static struct device *
640 device_create_default(const char *name, bool external)
641 {
642 struct device *dev;
643
644 if (!external && system_if_force_external(name))
645 return NULL;
646
647 D(DEVICE, "Create simple device '%s'\n", name);
648 dev = calloc(1, sizeof(*dev));
649 if (!dev)
650 return NULL;
651
652 dev->external = external;
653 dev->set_state = simple_device_set_state;
654
655 if (device_init(dev, &simple_device_type, name) < 0) {
656 device_cleanup(dev);
657 free(dev);
658 return NULL;
659 }
660
661 dev->default_config = true;
662 if (external)
663 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
664
665 device_check_state(dev);
666
667 return dev;
668 }
669
670 struct device *
671 device_find(const char *name)
672 {
673 struct device *dev;
674
675 return avl_find_element(&devices, name, dev, avl);
676 }
677
678 struct device *
679 __device_get(const char *name, int create, bool check_vlan)
680 {
681 struct device *dev;
682
683 dev = avl_find_element(&devices, name, dev, avl);
684
685 if (!dev && check_vlan && strchr(name, '.'))
686 return get_vlan_device_chain(name, create);
687
688 if (name[0] == '@')
689 return device_alias_get(name + 1);
690
691 if (dev) {
692 if (create > 1 && !dev->external) {
693 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
694 dev->external = true;
695 device_set_present(dev, true);
696 }
697 return dev;
698 }
699
700 if (!create)
701 return NULL;
702
703 return device_create_default(name, create > 1);
704 }
705
706 static void
707 device_delete(struct device *dev)
708 {
709 if (!dev->avl.key)
710 return;
711
712 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
713 avl_delete(&devices, &dev->avl);
714 dev->avl.key = NULL;
715 }
716
717 static int device_cleanup_cb(void *ctx, struct safe_list *list)
718 {
719 struct device_user *dep = container_of(list, struct device_user, list);
720 if (dep->cb)
721 dep->cb(dep, DEV_EVENT_REMOVE);
722
723 device_release(dep);
724 return 0;
725 }
726
727 void device_cleanup(struct device *dev)
728 {
729 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
730 safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
731 safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
732 device_delete(dev);
733 }
734
735 static void __device_set_present(struct device *dev, bool state)
736 {
737 if (dev->present == state)
738 return;
739
740 dev->present = state;
741 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
742 }
743
744 void
745 device_refresh_present(struct device *dev)
746 {
747 bool state = dev->sys_present;
748
749 if (dev->disabled || dev->deferred)
750 state = false;
751
752 __device_set_present(dev, state);
753 }
754
755 void
756 device_set_auth_status(struct device *dev, bool value)
757 {
758 if (dev->auth_status == value)
759 return;
760
761 dev->auth_status = value;
762 if (!dev->present)
763 return;
764
765 if (dev->auth_status) {
766 device_broadcast_event(dev, DEV_EVENT_AUTH_UP);
767 return;
768 }
769
770 device_broadcast_event(dev, DEV_EVENT_LINK_DOWN);
771 if (!dev->link_active)
772 return;
773
774 device_broadcast_event(dev, DEV_EVENT_LINK_UP);
775 }
776
777 void device_set_present(struct device *dev, bool state)
778 {
779 if (dev->sys_present == state)
780 return;
781
782 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
783 dev->sys_present = state;
784 device_refresh_present(dev);
785 if (!state)
786 safe_list_for_each(&dev->users, device_release_cb, NULL);
787 }
788
789 void device_set_link(struct device *dev, bool state)
790 {
791 if (dev->link_active == state)
792 return;
793
794 netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
795
796 dev->link_active = state;
797 if (!state)
798 dev->auth_status = false;
799 device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
800 }
801
802 void device_set_ifindex(struct device *dev, int ifindex)
803 {
804 if (dev->ifindex == ifindex)
805 return;
806
807 dev->ifindex = ifindex;
808 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
809 }
810
811 int device_set_ifname(struct device *dev, const char *name)
812 {
813 int ret = 0;
814
815 if (!strcmp(dev->ifname, name))
816 return 0;
817
818 if (strlen(name) > sizeof(dev->ifname) - 1)
819 return -1;
820
821 if (dev->avl.key)
822 avl_delete(&devices, &dev->avl);
823
824 strcpy(dev->ifname, name);
825
826 if (dev->avl.key)
827 ret = avl_insert(&devices, &dev->avl);
828
829 if (ret == 0)
830 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFNAME);
831
832 return ret;
833 }
834
835 static int device_refcount(struct device *dev)
836 {
837 struct list_head *list;
838 int count = 0;
839
840 list_for_each(list, &dev->users.list)
841 count++;
842
843 list_for_each(list, &dev->aliases.list)
844 count++;
845
846 return count;
847 }
848
849 static void
850 __device_add_user(struct device_user *dep, struct device *dev)
851 {
852 struct safe_list *head;
853
854 dep->dev = dev;
855
856 if (dep->alias)
857 head = &dev->aliases;
858 else
859 head = &dev->users;
860
861 safe_list_add(&dep->list, head);
862 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
863
864 if (dep->cb && dev->present) {
865 dep->cb(dep, DEV_EVENT_ADD);
866 if (dev->active)
867 dep->cb(dep, DEV_EVENT_UP);
868
869 if (dev->link_active)
870 dep->cb(dep, DEV_EVENT_LINK_UP);
871 }
872 }
873
874 void device_add_user(struct device_user *dep, struct device *dev)
875 {
876 if (dep->dev == dev)
877 return;
878
879 if (dep->dev)
880 device_remove_user(dep);
881
882 if (!dev)
883 return;
884
885 __device_add_user(dep, dev);
886 }
887
888 static void
889 device_free(struct device *dev)
890 {
891 __devlock++;
892 free(dev->config);
893 device_cleanup(dev);
894 dev->type->free(dev);
895 __devlock--;
896 }
897
898 static void
899 __device_free_unused(struct uloop_timeout *timeout)
900 {
901 struct device *dev, *tmp;
902
903 avl_for_each_element_safe(&devices, dev, avl, tmp) {
904 if (!safe_list_empty(&dev->users) ||
905 !safe_list_empty(&dev->aliases) ||
906 dev->current_config)
907 continue;
908
909 device_free(dev);
910 }
911 }
912
913 void device_free_unused(void)
914 {
915 static struct uloop_timeout free_timer = {
916 .cb = __device_free_unused,
917 };
918
919 uloop_timeout_set(&free_timer, 1);
920 }
921
922 void device_remove_user(struct device_user *dep)
923 {
924 struct device *dev = dep->dev;
925
926 if (!dep->dev)
927 return;
928
929 dep->hotplug = false;
930 if (dep->claimed)
931 device_release(dep);
932
933 safe_list_del(&dep->list);
934 dep->dev = NULL;
935 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
936 device_free_unused();
937 }
938
939 void
940 device_init_pending(void)
941 {
942 struct device *dev, *tmp;
943
944 avl_for_each_element_safe(&devices, dev, avl, tmp) {
945 if (!dev->config_pending)
946 continue;
947
948 dev->type->config_init(dev);
949 dev->config_pending = false;
950 device_check_state(dev);
951 }
952 }
953
954 bool
955 device_check_ip6segmentrouting(void)
956 {
957 struct device *dev;
958 bool ip6segmentrouting = false;
959
960 avl_for_each_element(&devices, dev, avl)
961 ip6segmentrouting |= dev->settings.ip6segmentrouting;
962
963 return ip6segmentrouting;
964 }
965
966 static enum dev_change_type
967 device_set_config(struct device *dev, struct device_type *type,
968 struct blob_attr *attr)
969 {
970 struct blob_attr *tb[__DEV_ATTR_MAX];
971 const struct uci_blob_param_list *cfg = type->config_params;
972
973 if (type != dev->type)
974 return DEV_CONFIG_RECREATE;
975
976 if (dev->type->reload)
977 return dev->type->reload(dev, attr);
978
979 if (uci_blob_check_equal(dev->config, attr, cfg))
980 return DEV_CONFIG_NO_CHANGE;
981
982 if (cfg == &device_attr_list) {
983 memset(tb, 0, sizeof(tb));
984
985 if (attr)
986 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
987 blob_data(attr), blob_len(attr));
988
989 device_init_settings(dev, tb);
990 return DEV_CONFIG_RESTART;
991 } else
992 return DEV_CONFIG_RECREATE;
993 }
994
995 enum dev_change_type
996 device_apply_config(struct device *dev, struct device_type *type,
997 struct blob_attr *config)
998 {
999 enum dev_change_type change;
1000
1001 change = device_set_config(dev, type, config);
1002 if (dev->external) {
1003 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1004 change = DEV_CONFIG_APPLIED;
1005 }
1006
1007 switch (change) {
1008 case DEV_CONFIG_RESTART:
1009 case DEV_CONFIG_APPLIED:
1010 D(DEVICE, "Device '%s': config applied\n", dev->ifname);
1011 config = blob_memdup(config);
1012 free(dev->config);
1013 dev->config = config;
1014 if (change == DEV_CONFIG_RESTART && dev->present) {
1015 int ret = 0;
1016
1017 device_set_present(dev, false);
1018 if (dev->active && !dev->external) {
1019 ret = dev->set_state(dev, false);
1020 if (!ret)
1021 ret = dev->set_state(dev, true);
1022 }
1023 if (!ret)
1024 device_set_present(dev, true);
1025 }
1026 break;
1027 case DEV_CONFIG_NO_CHANGE:
1028 D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
1029 break;
1030 case DEV_CONFIG_RECREATE:
1031 break;
1032 }
1033
1034 return change;
1035 }
1036
1037 static void
1038 device_replace(struct device *dev, struct device *odev)
1039 {
1040 struct device_user *dep;
1041
1042 __devlock++;
1043 if (odev->present)
1044 device_set_present(odev, false);
1045
1046 while (!list_empty(&odev->users.list)) {
1047 dep = list_first_entry(&odev->users.list, struct device_user, list.list);
1048 device_release(dep);
1049 if (!dep->dev)
1050 continue;
1051
1052 safe_list_del(&dep->list);
1053 __device_add_user(dep, dev);
1054 }
1055 __devlock--;
1056
1057 device_free(odev);
1058 }
1059
1060 void
1061 device_reset_config(void)
1062 {
1063 struct device *dev;
1064
1065 avl_for_each_element(&devices, dev, avl)
1066 dev->current_config = false;
1067 }
1068
1069 void
1070 device_reset_old(void)
1071 {
1072 struct device *dev, *tmp, *ndev;
1073
1074 avl_for_each_element_safe(&devices, dev, avl, tmp) {
1075 if (dev->current_config || dev->default_config)
1076 continue;
1077
1078 if (dev->type != &simple_device_type)
1079 continue;
1080
1081 ndev = device_create_default(dev->ifname, dev->external);
1082 if (!ndev)
1083 continue;
1084
1085 device_replace(ndev, dev);
1086 }
1087 }
1088
1089 struct device *
1090 device_create(const char *name, struct device_type *type,
1091 struct blob_attr *config)
1092 {
1093 struct device *odev = NULL, *dev;
1094 enum dev_change_type change;
1095
1096 odev = device_find(name);
1097 if (odev) {
1098 odev->current_config = true;
1099 change = device_apply_config(odev, type, config);
1100 switch (change) {
1101 case DEV_CONFIG_RECREATE:
1102 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
1103 device_delete(odev);
1104 break;
1105 default:
1106 return odev;
1107 }
1108 } else
1109 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
1110
1111 config = blob_memdup(config);
1112 if (!config)
1113 return NULL;
1114
1115 dev = type->create(name, type, config);
1116 if (!dev)
1117 return NULL;
1118
1119 dev->current_config = true;
1120 dev->config = config;
1121 if (odev)
1122 device_replace(dev, odev);
1123
1124 if (!config_init && dev->config_pending) {
1125 type->config_init(dev);
1126 dev->config_pending = false;
1127 }
1128
1129 device_check_state(dev);
1130
1131 return dev;
1132 }
1133
1134 void
1135 device_dump_status(struct blob_buf *b, struct device *dev)
1136 {
1137 struct device_settings st;
1138 void *c, *s;
1139
1140 if (!dev) {
1141 avl_for_each_element(&devices, dev, avl) {
1142 if (!dev->present)
1143 continue;
1144 c = blobmsg_open_table(b, dev->ifname);
1145 device_dump_status(b, dev);
1146 blobmsg_close_table(b, c);
1147 }
1148
1149 return;
1150 }
1151
1152 blobmsg_add_u8(b, "external", dev->external);
1153 blobmsg_add_u8(b, "present", dev->present);
1154 blobmsg_add_string(b, "type", dev->type->name);
1155
1156 if (!dev->present)
1157 return;
1158
1159 blobmsg_add_u8(b, "up", !!dev->active);
1160 blobmsg_add_u8(b, "carrier", !!dev->link_active);
1161 blobmsg_add_u8(b, "auth_status", !!dev->auth_status);
1162
1163 if (dev->type->dump_info)
1164 dev->type->dump_info(dev, b);
1165 else
1166 system_if_dump_info(dev, b);
1167
1168 if (dev->active) {
1169 device_merge_settings(dev, &st);
1170 if (st.flags & DEV_OPT_MTU)
1171 blobmsg_add_u32(b, "mtu", st.mtu);
1172 if (st.flags & DEV_OPT_MTU6)
1173 blobmsg_add_u32(b, "mtu6", st.mtu6);
1174 if (st.flags & DEV_OPT_MACADDR)
1175 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
1176 if (st.flags & DEV_OPT_TXQUEUELEN)
1177 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
1178 if (st.flags & DEV_OPT_IPV6)
1179 blobmsg_add_u8(b, "ipv6", st.ipv6);
1180 if (st.flags & DEV_OPT_IP6SEGMENTROUTING)
1181 blobmsg_add_u8(b, "ip6segmentrouting", st.ip6segmentrouting);
1182 if (st.flags & DEV_OPT_PROMISC)
1183 blobmsg_add_u8(b, "promisc", st.promisc);
1184 if (st.flags & DEV_OPT_RPFILTER)
1185 blobmsg_add_u32(b, "rpfilter", st.rpfilter);
1186 if (st.flags & DEV_OPT_ACCEPTLOCAL)
1187 blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
1188 if (st.flags & DEV_OPT_IGMPVERSION)
1189 blobmsg_add_u32(b, "igmpversion", st.igmpversion);
1190 if (st.flags & DEV_OPT_MLDVERSION)
1191 blobmsg_add_u32(b, "mldversion", st.mldversion);
1192 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
1193 blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
1194 blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
1195 }
1196 if (st.flags & DEV_OPT_NEIGHGCSTALETIME) {
1197 blobmsg_add_u32(b, "neigh4gcstaletime", st.neigh4gcstaletime);
1198 blobmsg_add_u32(b, "neigh6gcstaletime", st.neigh6gcstaletime);
1199 }
1200 if (st.flags & DEV_OPT_NEIGHLOCKTIME)
1201 blobmsg_add_u32(b, "neigh4locktime", st.neigh4locktime);
1202 if (st.flags & DEV_OPT_DADTRANSMITS)
1203 blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
1204 if (st.flags & DEV_OPT_MULTICAST_TO_UNICAST)
1205 blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
1206 if (st.flags & DEV_OPT_MULTICAST_ROUTER)
1207 blobmsg_add_u32(b, "multicast_router", st.multicast_router);
1208 if (st.flags & DEV_OPT_MULTICAST_FAST_LEAVE)
1209 blobmsg_add_u8(b, "multicast_fast_leave", st.multicast_fast_leave);
1210 if (st.flags & DEV_OPT_MULTICAST)
1211 blobmsg_add_u8(b, "multicast", st.multicast);
1212 if (st.flags & DEV_OPT_LEARNING)
1213 blobmsg_add_u8(b, "learning", st.learning);
1214 if (st.flags & DEV_OPT_UNICAST_FLOOD)
1215 blobmsg_add_u8(b, "unicast_flood", st.unicast_flood);
1216 if (st.flags & DEV_OPT_SENDREDIRECTS)
1217 blobmsg_add_u8(b, "sendredirects", st.sendredirects);
1218 if (st.flags & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
1219 blobmsg_add_u8(b, "drop_v4_unicast_in_l2_multicast", st.drop_v4_unicast_in_l2_multicast);
1220 if (st.flags & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
1221 blobmsg_add_u8(b, "drop_v6_unicast_in_l2_multicast", st.drop_v6_unicast_in_l2_multicast);
1222 if (st.flags & DEV_OPT_DROP_GRATUITOUS_ARP)
1223 blobmsg_add_u8(b, "drop_gratuitous_arp", st.drop_gratuitous_arp);
1224 if (st.flags & DEV_OPT_DROP_UNSOLICITED_NA)
1225 blobmsg_add_u8(b, "drop_unsolicited_na", st.drop_unsolicited_na);
1226 if (st.flags & DEV_OPT_ARP_ACCEPT)
1227 blobmsg_add_u8(b, "arp_accept", st.arp_accept);
1228 if (st.flags & DEV_OPT_AUTH)
1229 blobmsg_add_u8(b, "auth", st.auth);
1230 }
1231
1232 s = blobmsg_open_table(b, "statistics");
1233 if (dev->type->dump_stats)
1234 dev->type->dump_stats(dev, b);
1235 else
1236 system_if_dump_stats(dev, b);
1237 blobmsg_close_table(b, s);
1238 }
1239
1240 static void __init simple_device_type_init(void)
1241 {
1242 device_type_add(&simple_device_type);
1243 }
1244
1245 void device_hotplug_event(const char *name, bool add)
1246 {
1247 struct device *dev;
1248
1249 wireless_device_hotplug_event(name, add);
1250
1251 dev = device_find(name);
1252 if (!dev || dev->type != &simple_device_type)
1253 return;
1254
1255 device_set_present(dev, add);
1256 }
OpenWrt Network interface configuration daemon