2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
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
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.
19 #include <sys/types.h>
20 #include <sys/socket.h>
21 #include <net/ethernet.h>
24 #include <netinet/ether.h>
31 static struct avl_tree devices;
32 static bool default_ps = true;
34 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
35 [DEV_ATTR_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
36 [DEV_ATTR_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
37 [DEV_ATTR_MTU6] = { .name = "mtu6", .type = BLOBMSG_TYPE_INT32 },
38 [DEV_ATTR_MACADDR] = { .name = "macaddr", .type = BLOBMSG_TYPE_STRING },
39 [DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
40 [DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
41 [DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
42 [DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
43 [DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
44 [DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
45 [DEV_ATTR_IGMPVERSION] = { .name = "igmpversion", .type = BLOBMSG_TYPE_INT32 },
46 [DEV_ATTR_MLDVERSION] = { .name = "mldversion", .type = BLOBMSG_TYPE_INT32 },
47 [DEV_ATTR_NEIGHREACHABLETIME] = { .name = "neighreachabletime", .type = BLOBMSG_TYPE_INT32 },
48 [DEV_ATTR_RPS] = { .name = "rps", .type = BLOBMSG_TYPE_BOOL },
49 [DEV_ATTR_XPS] = { .name = "xps", .type = BLOBMSG_TYPE_BOOL },
50 [DEV_ATTR_DADTRANSMITS] = { .name = "dadtransmits", .type = BLOBMSG_TYPE_INT32 },
51 [DEV_ATTR_MULTICAST_TO_UNICAST] = { .name = "multicast_to_unicast", .type = BLOBMSG_TYPE_BOOL },
52 [DEV_ATTR_MULTICAST_ROUTER] = { .name = "multicast_router", .type = BLOBMSG_TYPE_INT32 },
55 const struct uci_blob_param_list device_attr_list = {
56 .n_params = __DEV_ATTR_MAX,
60 static int __devlock = 0;
62 void device_lock(void)
67 void device_unlock(void)
71 device_free_unused(NULL);
74 static int set_device_state(struct device *dev, bool state)
77 /* Get ifindex for all devices being enabled so a valid */
78 /* ifindex is in place avoiding possible race conditions */
79 device_set_ifindex(dev, system_if_resolve(dev));
92 simple_device_set_state(struct device *dev, bool state)
97 pdev = dev->parent.dev;
99 pdev = system_if_get_parent(dev);
101 device_add_user(&dev->parent, pdev);
106 ret = device_claim(&dev->parent);
108 device_release(&dev->parent);
113 return set_device_state(dev, state);
116 static struct device *
117 simple_device_create(const char *name, struct blob_attr *attr)
119 struct blob_attr *tb[__DEV_ATTR_MAX];
120 struct device *dev = NULL;
122 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
123 dev = device_get(name, true);
127 dev->set_state = simple_device_set_state;
128 device_init_settings(dev, tb);
133 static void simple_device_free(struct device *dev)
136 device_remove_user(&dev->parent);
140 const struct device_type simple_device_type = {
141 .name = "Network device",
142 .config_params = &device_attr_list,
144 .create = simple_device_create,
145 .check_state = system_if_check,
146 .free = simple_device_free,
150 device_merge_settings(struct device *dev, struct device_settings *n)
152 struct device_settings *os = &dev->orig_settings;
153 struct device_settings *s = &dev->settings;
155 memset(n, 0, sizeof(*n));
156 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
157 n->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
158 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
159 s->txqueuelen : os->txqueuelen;
161 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
163 n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
164 n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
165 n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
166 n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
167 n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
168 n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
169 n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
170 s->neigh4reachabletime : os->neigh4reachabletime;
171 n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
172 s->neigh6reachabletime : os->neigh6reachabletime;
173 n->dadtransmits = s->flags & DEV_OPT_DADTRANSMITS ?
174 s->dadtransmits : os->dadtransmits;
175 n->multicast_to_unicast = s->multicast_to_unicast;
176 n->multicast_router = s->multicast_router;
177 n->flags = s->flags | os->flags | os->valid_flags;
181 device_init_settings(struct device *dev, struct blob_attr **tb)
183 struct device_settings *s = &dev->settings;
184 struct blob_attr *cur;
185 struct ether_addr *ea;
186 bool disabled = false;
189 if ((cur = tb[DEV_ATTR_ENABLED]))
190 disabled = !blobmsg_get_bool(cur);
192 if ((cur = tb[DEV_ATTR_MTU])) {
193 s->mtu = blobmsg_get_u32(cur);
194 s->flags |= DEV_OPT_MTU;
197 if ((cur = tb[DEV_ATTR_MTU6])) {
198 s->mtu6 = blobmsg_get_u32(cur);
199 s->flags |= DEV_OPT_MTU6;
202 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
203 s->txqueuelen = blobmsg_get_u32(cur);
204 s->flags |= DEV_OPT_TXQUEUELEN;
207 if ((cur = tb[DEV_ATTR_MACADDR])) {
208 ea = ether_aton(blobmsg_data(cur));
210 memcpy(s->macaddr, ea, 6);
211 s->flags |= DEV_OPT_MACADDR;
215 if ((cur = tb[DEV_ATTR_IPV6])) {
216 s->ipv6 = blobmsg_get_bool(cur);
217 s->flags |= DEV_OPT_IPV6;
220 if ((cur = tb[DEV_ATTR_PROMISC])) {
221 s->promisc = blobmsg_get_bool(cur);
222 s->flags |= DEV_OPT_PROMISC;
225 if ((cur = tb[DEV_ATTR_RPFILTER])) {
226 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
227 s->flags |= DEV_OPT_RPFILTER;
229 DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
232 if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
233 s->acceptlocal = blobmsg_get_bool(cur);
234 s->flags |= DEV_OPT_ACCEPTLOCAL;
237 if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
238 s->igmpversion = blobmsg_get_u32(cur);
239 if (s->igmpversion >= 1 && s->igmpversion <= 3)
240 s->flags |= DEV_OPT_IGMPVERSION;
242 DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
245 if ((cur = tb[DEV_ATTR_MLDVERSION])) {
246 s->mldversion = blobmsg_get_u32(cur);
247 if (s->mldversion >= 1 && s->mldversion <= 2)
248 s->flags |= DEV_OPT_MLDVERSION;
250 DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
253 if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
254 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
255 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
258 if ((cur = tb[DEV_ATTR_RPS])) {
259 s->rps = blobmsg_get_bool(cur);
260 s->flags |= DEV_OPT_RPS;
265 if ((cur = tb[DEV_ATTR_XPS])) {
266 s->xps = blobmsg_get_bool(cur);
267 s->flags |= DEV_OPT_XPS;
272 if ((cur = tb[DEV_ATTR_DADTRANSMITS])) {
273 s->dadtransmits = blobmsg_get_u32(cur);
274 s->flags |= DEV_OPT_DADTRANSMITS;
277 if ((cur = tb[DEV_ATTR_MULTICAST_TO_UNICAST])) {
278 s->multicast_to_unicast = blobmsg_get_bool(cur);
279 s->flags |= DEV_OPT_MULTICAST_TO_UNICAST;
282 if ((cur = tb[DEV_ATTR_MULTICAST_ROUTER])) {
283 s->multicast_router = blobmsg_get_u32(cur);
284 if (s->multicast_router <= 2)
285 s->flags |= DEV_OPT_MULTICAST_ROUTER;
287 DPRINTF("Invalid value: %d - (Use 0: never, 1: learn, 2: always)\n", blobmsg_get_u32(cur));
290 device_set_disabled(dev, disabled);
293 static void __init dev_init(void)
295 avl_init(&devices, avl_strcmp, true, NULL);
298 static int device_broadcast_cb(void *ctx, struct safe_list *list)
300 struct device_user *dep = container_of(list, struct device_user, list);
303 /* device might have been removed by an earlier callback */
312 void device_broadcast_event(struct device *dev, enum device_event ev)
316 safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
317 safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
320 int device_claim(struct device_user *dep)
322 struct device *dev = dep->dev;
329 D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
330 if (++dev->active != 1)
333 device_broadcast_event(dev, DEV_EVENT_SETUP);
335 /* Get ifindex for external claimed devices so a valid */
336 /* ifindex is in place avoiding possible race conditions */
337 device_set_ifindex(dev, system_if_resolve(dev));
341 system_if_get_settings(dev, &dev->orig_settings);
343 ret = dev->set_state(dev, true);
346 device_broadcast_event(dev, DEV_EVENT_UP);
348 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
350 dep->claimed = false;
356 void device_release(struct device_user *dep)
358 struct device *dev = dep->dev;
363 dep->claimed = false;
365 D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
366 assert(dev->active >= 0);
371 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
373 dev->set_state(dev, false);
374 device_broadcast_event(dev, DEV_EVENT_DOWN);
377 int device_check_state(struct device *dev)
379 if (!dev->type->check_state)
380 return simple_device_type.check_state(dev);
382 return dev->type->check_state(dev);
385 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
391 strncpy(dev->ifname, name, IFNAMSIZ);
393 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
394 INIT_SAFE_LIST(&dev->users);
395 INIT_SAFE_LIST(&dev->aliases);
399 dev->set_state = set_device_state;
402 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
406 device_init_virtual(dev, type, ifname);
408 dev->avl.key = dev->ifname;
410 ret = avl_insert(&devices, &dev->avl);
414 system_if_clear_state(dev);
415 device_check_state(dev);
416 dev->settings.rps = default_ps;
417 dev->settings.xps = default_ps;
422 static struct device *
423 device_create_default(const char *name, bool external)
427 if (!external && system_if_force_external(name))
430 D(DEVICE, "Create simple device '%s'\n", name);
431 dev = calloc(1, sizeof(*dev));
435 dev->external = external;
436 dev->set_state = simple_device_set_state;
437 device_init(dev, &simple_device_type, name);
438 dev->default_config = true;
440 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
445 device_get(const char *name, int create)
449 if (strchr(name, '.'))
450 return get_vlan_device_chain(name, create);
453 return device_alias_get(name + 1);
455 dev = avl_find_element(&devices, name, dev, avl);
457 if (create > 1 && !dev->external) {
458 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
459 dev->external = true;
460 device_set_present(dev, true);
468 return device_create_default(name, create > 1);
472 device_delete(struct device *dev)
477 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
478 avl_delete(&devices, &dev->avl);
482 static int device_cleanup_cb(void *ctx, struct safe_list *list)
484 struct device_user *dep = container_of(list, struct device_user, list);
486 dep->cb(dep, DEV_EVENT_REMOVE);
492 void device_cleanup(struct device *dev)
494 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
495 safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
496 safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
500 static void __device_set_present(struct device *dev, bool state)
502 if (dev->present == state)
505 dev->present = state;
506 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
510 device_refresh_present(struct device *dev)
512 bool state = dev->sys_present;
514 if (dev->disabled || dev->deferred)
517 __device_set_present(dev, state);
520 void device_set_present(struct device *dev, bool state)
522 if (dev->sys_present == state)
525 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
526 dev->sys_present = state;
527 device_refresh_present(dev);
530 void device_set_link(struct device *dev, bool state)
532 if (dev->link_active == state)
535 netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
537 dev->link_active = state;
538 device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
541 void device_set_ifindex(struct device *dev, int ifindex)
543 if (dev->ifindex == ifindex)
546 dev->ifindex = ifindex;
547 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
550 static int device_refcount(struct device *dev)
552 struct list_head *list;
555 list_for_each(list, &dev->users.list)
558 list_for_each(list, &dev->aliases.list)
565 __device_add_user(struct device_user *dep, struct device *dev)
567 struct safe_list *head;
572 head = &dev->aliases;
576 safe_list_add(&dep->list, head);
577 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
579 if (dep->cb && dev->present) {
580 dep->cb(dep, DEV_EVENT_ADD);
582 dep->cb(dep, DEV_EVENT_UP);
584 if (dev->link_active)
585 dep->cb(dep, DEV_EVENT_LINK_UP);
589 void device_add_user(struct device_user *dep, struct device *dev)
595 device_remove_user(dep);
600 __device_add_user(dep, dev);
604 device_free(struct device *dev)
609 dev->type->free(dev);
614 __device_free_unused(struct device *dev)
616 if (!safe_list_empty(&dev->users) ||
617 !safe_list_empty(&dev->aliases) ||
618 dev->current_config || __devlock)
624 void device_remove_user(struct device_user *dep)
626 struct device *dev = dep->dev;
631 dep->hotplug = false;
635 safe_list_del(&dep->list);
637 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
638 __device_free_unused(dev);
642 device_free_unused(struct device *dev)
647 return __device_free_unused(dev);
649 avl_for_each_element_safe(&devices, dev, avl, tmp)
650 __device_free_unused(dev);
654 device_init_pending(void)
656 struct device *dev, *tmp;
658 avl_for_each_element_safe(&devices, dev, avl, tmp) {
659 if (!dev->config_pending)
662 dev->type->config_init(dev);
663 dev->config_pending = false;
667 static enum dev_change_type
668 device_set_config(struct device *dev, const struct device_type *type,
669 struct blob_attr *attr)
671 struct blob_attr *tb[__DEV_ATTR_MAX];
672 const struct uci_blob_param_list *cfg = type->config_params;
674 if (type != dev->type)
675 return DEV_CONFIG_RECREATE;
677 if (dev->type->reload)
678 return dev->type->reload(dev, attr);
680 if (uci_blob_check_equal(dev->config, attr, cfg))
681 return DEV_CONFIG_NO_CHANGE;
683 if (cfg == &device_attr_list) {
684 memset(tb, 0, sizeof(tb));
687 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
688 blob_data(attr), blob_len(attr));
690 device_init_settings(dev, tb);
691 return DEV_CONFIG_RESTART;
693 return DEV_CONFIG_RECREATE;
697 device_apply_config(struct device *dev, const struct device_type *type,
698 struct blob_attr *config)
700 enum dev_change_type change;
702 change = device_set_config(dev, type, config);
704 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
705 change = DEV_CONFIG_APPLIED;
709 case DEV_CONFIG_RESTART:
710 case DEV_CONFIG_APPLIED:
711 D(DEVICE, "Device '%s': config applied\n", dev->ifname);
712 config = blob_memdup(config);
714 dev->config = config;
715 if (change == DEV_CONFIG_RESTART && dev->present) {
716 device_set_present(dev, false);
717 if (dev->active && !dev->external) {
718 dev->set_state(dev, false);
719 dev->set_state(dev, true);
721 device_set_present(dev, true);
724 case DEV_CONFIG_NO_CHANGE:
725 D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
727 case DEV_CONFIG_RECREATE:
735 device_replace(struct device *dev, struct device *odev)
737 struct device_user *dep, *tmp;
741 device_set_present(odev, false);
743 list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
745 safe_list_del(&dep->list);
746 __device_add_user(dep, dev);
754 device_reset_config(void)
758 avl_for_each_element(&devices, dev, avl)
759 dev->current_config = false;
763 device_reset_old(void)
765 struct device *dev, *tmp, *ndev;
767 avl_for_each_element_safe(&devices, dev, avl, tmp) {
768 if (dev->current_config || dev->default_config)
771 if (dev->type != &simple_device_type)
774 ndev = device_create_default(dev->ifname, dev->external);
778 device_replace(ndev, dev);
783 device_set_default_ps(bool state)
787 if (state == default_ps)
792 avl_for_each_element(&devices, dev, avl) {
793 struct device_settings *s = &dev->settings;
794 unsigned int apply_mask = 0;
796 if (!(s->flags & DEV_OPT_RPS)) {
798 apply_mask |= DEV_OPT_RPS;
801 if (!(s->flags & DEV_OPT_XPS)) {
803 apply_mask |= DEV_OPT_XPS;
809 if (!(dev->external || (dev->present && dev->active)) ||
813 system_if_apply_settings(dev, s, apply_mask);
818 device_create(const char *name, const struct device_type *type,
819 struct blob_attr *config)
821 struct device *odev = NULL, *dev;
822 enum dev_change_type change;
824 odev = device_get(name, false);
826 odev->current_config = true;
827 change = device_apply_config(odev, type, config);
829 case DEV_CONFIG_RECREATE:
830 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
837 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
839 config = blob_memdup(config);
843 dev = type->create(name, config);
847 dev->current_config = true;
848 dev->config = config;
850 device_replace(dev, odev);
852 if (!config_init && dev->config_pending) {
853 type->config_init(dev);
854 dev->config_pending = false;
861 device_dump_status(struct blob_buf *b, struct device *dev)
863 struct device_settings st;
867 avl_for_each_element(&devices, dev, avl) {
870 c = blobmsg_open_table(b, dev->ifname);
871 device_dump_status(b, dev);
872 blobmsg_close_table(b, c);
878 blobmsg_add_u8(b, "external", dev->external);
879 blobmsg_add_u8(b, "present", dev->present);
880 blobmsg_add_string(b, "type", dev->type->name);
885 blobmsg_add_u8(b, "up", !!dev->active);
886 blobmsg_add_u8(b, "carrier", !!dev->link_active);
888 if (dev->type->dump_info)
889 dev->type->dump_info(dev, b);
891 system_if_dump_info(dev, b);
894 device_merge_settings(dev, &st);
895 if (st.flags & DEV_OPT_MTU)
896 blobmsg_add_u32(b, "mtu", st.mtu);
897 if (st.flags & DEV_OPT_MTU6)
898 blobmsg_add_u32(b, "mtu6", st.mtu6);
899 if (st.flags & DEV_OPT_MACADDR)
900 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
901 if (st.flags & DEV_OPT_TXQUEUELEN)
902 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
903 if (st.flags & DEV_OPT_IPV6)
904 blobmsg_add_u8(b, "ipv6", st.ipv6);
905 if (st.flags & DEV_OPT_PROMISC)
906 blobmsg_add_u8(b, "promisc", st.promisc);
907 if (st.flags & DEV_OPT_RPFILTER)
908 blobmsg_add_u32(b, "rpfilter", st.rpfilter);
909 if (st.flags & DEV_OPT_ACCEPTLOCAL)
910 blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
911 if (st.flags & DEV_OPT_IGMPVERSION)
912 blobmsg_add_u32(b, "igmpversion", st.igmpversion);
913 if (st.flags & DEV_OPT_MLDVERSION)
914 blobmsg_add_u32(b, "mldversion", st.mldversion);
915 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
916 blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
917 blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
919 if (st.flags & DEV_OPT_DADTRANSMITS)
920 blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
921 if (st.flags & DEV_OPT_MULTICAST_TO_UNICAST)
922 blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
923 if (st.flags & DEV_OPT_MULTICAST_ROUTER)
924 blobmsg_add_u32(b, "multicast_router", st.multicast_router);
927 s = blobmsg_open_table(b, "statistics");
928 if (dev->type->dump_stats)
929 dev->type->dump_stats(dev, b);
931 system_if_dump_stats(dev, b);
932 blobmsg_close_table(b, s);