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.
20 #include "interface.h"
21 #include "interface-ip.h"
27 struct vlist_tree interfaces;
28 static LIST_HEAD(iface_all_users);
29 static unsigned int interface_serial = 0;
35 IFACE_ATTR_DEFAULTROUTE,
38 IFACE_ATTR_DNS_SEARCH,
49 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
50 [IFACE_ATTR_PROTO] = { .name = "proto", .type = BLOBMSG_TYPE_STRING },
51 [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
52 [IFACE_ATTR_AUTO] = { .name = "auto", .type = BLOBMSG_TYPE_BOOL },
53 [IFACE_ATTR_DEFAULTROUTE] = { .name = "defaultroute", .type = BLOBMSG_TYPE_BOOL },
54 [IFACE_ATTR_PEERDNS] = { .name = "peerdns", .type = BLOBMSG_TYPE_BOOL },
55 [IFACE_ATTR_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
56 [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
57 [IFACE_ATTR_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
58 [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
59 [IFACE_ATTR_IP6ASSIGN] = { .name = "ip6assign", .type = BLOBMSG_TYPE_INT32 },
60 [IFACE_ATTR_IP6HINT] = { .name = "ip6hint", .type = BLOBMSG_TYPE_STRING },
61 [IFACE_ATTR_IP4TABLE] = { .name = "ip4table", .type = BLOBMSG_TYPE_STRING },
62 [IFACE_ATTR_IP6TABLE] = { .name = "ip6table", .type = BLOBMSG_TYPE_STRING },
63 [IFACE_ATTR_IP6CLASS] = { .name = "ip6class", .type = BLOBMSG_TYPE_ARRAY },
66 static const union config_param_info iface_attr_info[IFACE_ATTR_MAX] = {
67 [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
68 [IFACE_ATTR_IP6CLASS] = { .type = BLOBMSG_TYPE_STRING },
71 const struct config_param_list interface_attr_list = {
72 .n_params = IFACE_ATTR_MAX,
73 .params = iface_attrs,
74 .info = iface_attr_info,
78 interface_clear_errors(struct interface *iface)
80 struct interface_error *error, *tmp;
82 list_for_each_entry_safe(error, tmp, &iface->errors, list) {
83 list_del(&error->list);
88 void interface_add_error(struct interface *iface, const char *subsystem,
89 const char *code, const char **data, int n_data)
91 struct interface_error *error;
94 char *dest, *d_subsys, *d_code;
97 len = n_data * sizeof(char *);
98 datalen = alloca(len);
99 for (i = 0; i < n_data; i++) {
100 datalen[i] = strlen(data[i]) + 1;
105 error = calloc_a(sizeof(*error) + sizeof(char *) + len,
106 &d_subsys, subsystem ? strlen(subsystem) + 1 : 0,
107 &d_code, code ? strlen(code) + 1 : 0);
111 list_add_tail(&error->list, &iface->errors);
113 dest = (char *) &error->data[n_data + 1];
114 for (i = 0; i < n_data; i++) {
115 error->data[i] = dest;
116 memcpy(dest, data[i], datalen[i]);
119 error->data[n_data++] = NULL;
122 error->subsystem = strcpy(d_subsys, subsystem);
125 error->code = strcpy(d_code, code);
129 interface_data_del(struct interface *iface, struct interface_data *data)
131 avl_delete(&iface->data, &data->node);
136 interface_data_flush(struct interface *iface)
138 struct interface_data *d, *tmp;
140 avl_for_each_element_safe(&iface->data, d, node, tmp)
141 interface_data_del(iface, d);
145 interface_add_data(struct interface *iface, const struct blob_attr *data)
147 struct interface_data *n, *o;
149 if (!blobmsg_check_attr(data, true))
150 return UBUS_STATUS_INVALID_ARGUMENT;
152 n = calloc(1, sizeof(*n) + blob_pad_len(data));
153 memcpy(n->data, data, blob_pad_len(data));
154 n->node.key = blobmsg_name(data);
156 o = avl_find_element(&iface->data, n->node.key, o, node);
158 interface_data_del(iface, o);
160 avl_insert(&iface->data, &n->node);
165 interface_event(struct interface *iface, enum interface_event ev)
167 struct interface_user *dep, *tmp;
168 struct device *adev = NULL;
170 list_for_each_entry_safe(dep, tmp, &iface->users, list)
171 dep->cb(dep, iface, ev);
173 list_for_each_entry_safe(dep, tmp, &iface_all_users, list)
174 dep->cb(dep, iface, ev);
178 adev = iface->l3_dev.dev;
181 alias_notify_device(iface->name, adev);
189 interface_flush_state(struct interface *iface)
191 if (iface->l3_dev.dev)
192 device_release(&iface->l3_dev);
193 interface_data_flush(iface);
197 mark_interface_down(struct interface *iface)
199 enum interface_state state = iface->state;
201 iface->state = IFS_DOWN;
203 interface_event(iface, IFEV_DOWN);
204 interface_ip_set_enabled(&iface->config_ip, false);
205 interface_ip_flush(&iface->proto_ip);
206 interface_flush_state(iface);
207 system_flush_routes();
211 __interface_set_down(struct interface *iface, bool force)
213 if (iface->state == IFS_DOWN ||
214 iface->state == IFS_TEARDOWN)
217 if (iface->state == IFS_UP)
218 interface_event(iface, IFEV_DOWN);
219 iface->state = IFS_TEARDOWN;
220 interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, force);
222 interface_flush_state(iface);
226 interface_cb(struct device_user *dep, enum device_event ev)
228 struct interface *iface;
231 iface = container_of(dep, struct interface, main_dev);
236 case DEV_EVENT_REMOVE:
243 interface_set_available(iface, new_state);
244 if (!new_state && dep->dev->external)
245 interface_set_main_dev(iface, NULL);
249 interface_set_available(struct interface *iface, bool new_state)
251 if (iface->available == new_state)
254 D(INTERFACE, "Interface '%s', available=%d\n", iface->name, new_state);
255 iface->available = new_state;
258 if (iface->autostart && !config_init)
259 interface_set_up(iface);
261 __interface_set_down(iface, true);
265 interface_add_user(struct interface_user *dep, struct interface *iface)
268 list_add(&dep->list, &iface_all_users);
273 list_add(&dep->list, &iface->users);
274 if (iface->state == IFS_UP)
275 dep->cb(dep, iface, IFEV_UP);
279 interface_remove_user(struct interface_user *dep)
281 list_del_init(&dep->list);
286 interface_add_assignment_classes(struct interface *iface, struct blob_attr *list)
288 struct blob_attr *cur;
291 blobmsg_for_each_attr(cur, list, rem) {
292 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
295 if (!blobmsg_check_attr(cur, NULL))
298 struct interface_assignment_class *c = malloc(sizeof(*c) + blobmsg_data_len(cur));
299 memcpy(c->name, blobmsg_data(cur), blobmsg_data_len(cur));
300 list_add(&c->head, &iface->assignment_classes);
305 interface_clear_assignment_classes(struct interface *iface)
307 while (!list_empty(&iface->assignment_classes)) {
308 struct interface_assignment_class *c = list_first_entry(&iface->assignment_classes,
309 struct interface_assignment_class, head);
316 interface_merge_assignment_data(struct interface *old, struct interface *new)
318 bool changed = (old->assignment_hint != new->assignment_hint ||
319 old->assignment_length != new->assignment_length ||
320 list_empty(&old->assignment_classes) != list_empty(&new->assignment_classes));
322 struct interface_assignment_class *c;
323 list_for_each_entry(c, &new->assignment_classes, head) {
324 // Compare list entries one-by-one to see if there was a change
325 if (list_empty(&old->assignment_classes)) // The new list is longer
331 struct interface_assignment_class *c_old = list_first_entry(&old->assignment_classes,
332 struct interface_assignment_class, head);
334 if (strcmp(c_old->name, c->name)) // An entry didn't match
337 list_del(&c_old->head);
341 // The old list was longer than the new one or the last entry didn't match
342 if (!list_empty(&old->assignment_classes)) {
343 interface_clear_assignment_classes(old);
347 list_splice_init(&new->assignment_classes, &old->assignment_classes);
350 old->assignment_hint = new->assignment_hint;
351 old->assignment_length = new->assignment_length;
352 interface_refresh_assignments(true);
357 interface_alias_cb(struct interface_user *dep, struct interface *iface, enum interface_event ev)
359 struct interface *alias = container_of(dep, struct interface, parent_iface);
360 struct device *dev = iface->l3_dev.dev;
367 interface_set_main_dev(alias, dev);
368 interface_set_available(alias, true);
371 interface_set_available(alias, false);
372 interface_set_main_dev(alias, NULL);
375 interface_remove_user(dep);
383 interface_claim_device(struct interface *iface)
385 struct interface *parent;
386 struct device *dev = NULL;
388 if (iface->parent_iface.iface)
389 interface_remove_user(&iface->parent_iface);
391 if (iface->parent_ifname) {
392 parent = vlist_find(&interfaces, iface->parent_ifname, parent, node);
393 iface->parent_iface.cb = interface_alias_cb;
394 interface_add_user(&iface->parent_iface, parent);
395 } else if (iface->ifname &&
396 !(iface->proto_handler->flags & PROTO_FLAG_NODEV)) {
397 dev = device_get(iface->ifname, true);
401 interface_set_main_dev(iface, dev);
403 if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
404 interface_set_available(iface, true);
408 interface_cleanup_state(struct interface *iface)
410 interface_set_available(iface, false);
412 interface_flush_state(iface);
413 interface_clear_errors(iface);
414 interface_set_proto_state(iface, NULL);
416 if (iface->main_dev.dev)
417 interface_set_main_dev(iface, NULL);
421 interface_cleanup(struct interface *iface)
423 struct interface_user *dep, *tmp;
425 if (iface->parent_iface.iface)
426 interface_remove_user(&iface->parent_iface);
428 list_for_each_entry_safe(dep, tmp, &iface->users, list)
429 interface_remove_user(dep);
431 interface_clear_assignment_classes(iface);
432 interface_ip_flush(&iface->config_ip);
433 interface_cleanup_state(iface);
437 interface_do_free(struct interface *iface)
439 interface_event(iface, IFEV_FREE);
440 interface_cleanup(iface);
442 netifd_ubus_remove_interface(iface);
443 avl_delete(&interfaces.avl, &iface->node.avl);
448 interface_do_reload(struct interface *iface)
450 interface_event(iface, IFEV_RELOAD);
451 interface_cleanup_state(iface);
452 proto_init_interface(iface, iface->config);
453 interface_claim_device(iface);
457 interface_handle_config_change(struct interface *iface)
459 enum interface_config_state state = iface->config_state;
461 iface->config_state = IFC_NORMAL;
466 interface_do_reload(iface);
469 interface_do_free(iface);
472 if (iface->autostart && iface->available)
473 interface_set_up(iface);
477 interface_proto_cb(struct interface_proto_state *state, enum interface_proto_event ev)
479 struct interface *iface = state->iface;
483 if (iface->state != IFS_SETUP)
486 interface_ip_set_enabled(&iface->config_ip, true);
487 system_flush_routes();
488 iface->state = IFS_UP;
489 iface->start_time = system_get_rtime();
490 interface_event(iface, IFEV_UP);
491 netifd_log_message(L_NOTICE, "Interface '%s' is now up\n", iface->name);
494 if (iface->state == IFS_DOWN)
497 netifd_log_message(L_NOTICE, "Interface '%s' is now down\n", iface->name);
498 mark_interface_down(iface);
499 if (iface->main_dev.dev)
500 device_release(&iface->main_dev);
501 interface_handle_config_change(iface);
503 case IFPEV_LINK_LOST:
504 if (iface->state != IFS_UP)
507 netifd_log_message(L_NOTICE, "Interface '%s' has lost the connection\n", iface->name);
508 mark_interface_down(iface);
509 iface->state = IFS_SETUP;
513 interface_write_resolv_conf();
516 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state)
519 iface->proto->free(iface->proto);
522 iface->state = IFS_DOWN;
523 iface->proto = state;
527 state->proto_event = interface_proto_cb;
528 state->iface = iface;
532 interface_init(struct interface *iface, const char *name,
533 struct blob_attr *config)
535 struct blob_attr *tb[IFACE_ATTR_MAX];
536 struct blob_attr *cur;
537 const char *proto_name = NULL;
539 strncpy(iface->name, name, sizeof(iface->name) - 1);
540 INIT_LIST_HEAD(&iface->errors);
541 INIT_LIST_HEAD(&iface->users);
542 INIT_LIST_HEAD(&iface->hotplug_list);
543 INIT_LIST_HEAD(&iface->assignment_classes);
544 interface_ip_init(iface);
545 avl_init(&iface->data, avl_strcmp, false, NULL);
546 iface->config_ip.enabled = false;
548 iface->main_dev.cb = interface_cb;
550 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
551 blob_data(config), blob_len(config));
553 if ((cur = tb[IFACE_ATTR_PROTO]))
554 proto_name = blobmsg_data(cur);
556 proto_attach_interface(iface, proto_name);
558 iface->autostart = blobmsg_get_bool_default(tb[IFACE_ATTR_AUTO], true);
559 iface->proto_ip.no_defaultroute =
560 !blobmsg_get_bool_default(tb[IFACE_ATTR_DEFAULTROUTE], true);
561 iface->proto_ip.no_dns =
562 !blobmsg_get_bool_default(tb[IFACE_ATTR_PEERDNS], true);
564 if ((cur = tb[IFACE_ATTR_DNS]))
565 interface_add_dns_server_list(&iface->config_ip, cur);
567 if ((cur = tb[IFACE_ATTR_DNS_SEARCH]))
568 interface_add_dns_search_list(&iface->config_ip, cur);
570 if ((cur = tb[IFACE_ATTR_METRIC]))
571 iface->metric = blobmsg_get_u32(cur);
573 if ((cur = tb[IFACE_ATTR_IP6ASSIGN]))
574 iface->assignment_length = blobmsg_get_u32(cur);
576 iface->assignment_hint = -1;
577 if ((cur = tb[IFACE_ATTR_IP6HINT]))
578 iface->assignment_hint = strtol(blobmsg_get_string(cur), NULL, 16) &
579 ~((1 << (64 - iface->assignment_length)) - 1);
581 if ((cur = tb[IFACE_ATTR_IP6CLASS]))
582 interface_add_assignment_classes(iface, cur);
585 if ((cur = tb[IFACE_ATTR_IP4TABLE])) {
586 if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip4table))
587 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
590 // Set a default exteranl routing table for IPv6 to do source-based-filtering
592 iface->ip6table = 1000 + ++interface_serial;
593 if ((cur = tb[IFACE_ATTR_IP6TABLE])) {
594 if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip6table))
595 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
598 iface->config_autostart = iface->autostart;
601 static bool __interface_add(struct interface *iface, struct blob_attr *config, bool alias)
603 struct blob_attr *tb[IFACE_ATTR_MAX];
604 struct blob_attr *cur;
606 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
607 blob_data(config), blob_len(config));
610 if ((cur = tb[IFACE_ATTR_INTERFACE]))
611 iface->parent_ifname = blobmsg_data(cur);
613 if (!iface->parent_ifname)
616 if ((cur = tb[IFACE_ATTR_IFNAME]))
617 iface->ifname = blobmsg_data(cur);
621 iface->config = config;
622 vlist_add(&interfaces, &iface->node, iface->name);
627 interface_add(struct interface *iface, struct blob_attr *config)
629 __interface_add(iface, config, false);
633 interface_add_alias(struct interface *iface, struct blob_attr *config)
635 if (iface->proto_handler->flags & PROTO_FLAG_NODEV)
638 return __interface_add(iface, config, true);
642 interface_set_l3_dev(struct interface *iface, struct device *dev)
644 bool enabled = iface->config_ip.enabled;
645 bool claimed = iface->l3_dev.claimed;
647 if (iface->l3_dev.dev == dev)
650 interface_ip_set_enabled(&iface->config_ip, false);
651 interface_ip_flush(&iface->proto_ip);
652 device_add_user(&iface->l3_dev, dev);
656 device_claim(&iface->l3_dev);
657 interface_ip_set_enabled(&iface->config_ip, enabled);
662 interface_set_main_dev(struct interface *iface, struct device *dev)
664 bool set_l3 = (iface->main_dev.dev == iface->l3_dev.dev);
665 bool claimed = iface->l3_dev.claimed;
667 if (iface->main_dev.dev == dev)
671 interface_set_l3_dev(iface, dev);
673 device_add_user(&iface->main_dev, dev);
675 device_claim(&iface->l3_dev);
677 if (!iface->l3_dev.dev)
678 interface_set_l3_dev(iface, dev);
682 interface_remove_link(struct interface *iface, struct device *dev)
684 struct device *mdev = iface->main_dev.dev;
686 if (mdev && mdev->hotplug_ops)
687 return mdev->hotplug_ops->del(mdev, dev);
689 if (!iface->main_dev.hotplug)
690 return UBUS_STATUS_INVALID_ARGUMENT;
692 if (dev != iface->main_dev.dev)
693 return UBUS_STATUS_INVALID_ARGUMENT;
695 device_remove_user(&iface->main_dev);
700 interface_add_link(struct interface *iface, struct device *dev)
702 struct device *mdev = iface->main_dev.dev;
707 if (iface->main_dev.hotplug)
708 device_remove_user(&iface->main_dev);
711 if (mdev->hotplug_ops)
712 return mdev->hotplug_ops->add(mdev, dev);
714 return UBUS_STATUS_NOT_SUPPORTED;
717 interface_set_main_dev(iface, dev);
718 iface->main_dev.hotplug = true;
723 interface_set_up(struct interface *iface)
727 iface->autostart = true;
729 if (iface->state != IFS_DOWN)
732 interface_clear_errors(iface);
733 if (!iface->available) {
734 interface_add_error(iface, "interface", "NO_DEVICE", NULL, 0);
738 if (iface->main_dev.dev) {
739 ret = device_claim(&iface->main_dev);
744 iface->state = IFS_SETUP;
745 ret = interface_proto_event(iface->proto, PROTO_CMD_SETUP, false);
747 mark_interface_down(iface);
755 interface_set_down(struct interface *iface)
758 vlist_for_each_element(&interfaces, iface, node)
759 __interface_set_down(iface, false);
761 iface->autostart = false;
762 __interface_set_down(iface, false);
769 interface_start_pending(void)
771 struct interface *iface;
773 vlist_for_each_element(&interfaces, iface, node) {
774 if (iface->available && iface->autostart)
775 interface_set_up(iface);
780 set_config_state(struct interface *iface, enum interface_config_state s)
782 iface->config_state = s;
783 if (iface->state == IFS_DOWN)
784 interface_handle_config_change(iface);
786 __interface_set_down(iface, false);
790 interface_update_start(struct interface *iface)
792 interface_ip_update_start(&iface->proto_ip);
796 interface_update_complete(struct interface *iface)
798 interface_ip_update_complete(&iface->proto_ip);
802 interface_replace_dns(struct interface_ip_settings *new, struct interface_ip_settings *old)
804 vlist_simple_replace(&new->dns_servers, &old->dns_servers);
805 vlist_simple_replace(&new->dns_search, &old->dns_search);
809 interface_change_config(struct interface *if_old, struct interface *if_new)
811 struct blob_attr *old_config = if_old->config;
812 bool reload = false, reload_ip = false;
814 #define FIELD_CHANGED_STR(field) \
815 ((!!if_old->field != !!if_new->field) || \
817 strcmp(if_old->field, if_new->field) != 0))
819 if (FIELD_CHANGED_STR(parent_ifname)) {
820 if (if_old->parent_iface.iface)
821 interface_remove_user(&if_old->parent_iface);
825 if (FIELD_CHANGED_STR(ifname) ||
826 if_old->proto_handler != if_new->proto_handler)
829 if (!if_old->proto_handler->config_params)
830 D(INTERFACE, "No config parameters for interface '%s'\n",
832 else if (!config_check_equal(if_old->config, if_new->config,
833 if_old->proto_handler->config_params))
836 #define UPDATE(field, __var) ({ \
837 bool __changed = (if_old->field != if_new->field); \
838 if_old->field = if_new->field; \
839 __var |= __changed; \
842 if_old->config = if_new->config;
843 if (!if_old->config_autostart && if_new->config_autostart)
844 if_old->autostart = true;
846 if_old->device_config = if_new->device_config;
847 if_old->config_autostart = if_new->config_autostart;
848 if_old->ifname = if_new->ifname;
849 if_old->parent_ifname = if_new->parent_ifname;
850 if_old->proto_handler = if_new->proto_handler;
852 if_old->proto_ip.no_dns = if_new->proto_ip.no_dns;
853 interface_replace_dns(&if_old->config_ip, &if_new->config_ip);
855 UPDATE(metric, reload_ip);
856 UPDATE(proto_ip.no_defaultroute, reload_ip);
857 interface_merge_assignment_data(if_old, if_new);
862 D(INTERFACE, "Reload interface '%s because of config changes\n",
864 interface_clear_errors(if_old);
865 set_config_state(if_old, IFC_RELOAD);
870 interface_ip_set_enabled(&if_old->config_ip, false);
871 interface_ip_set_enabled(&if_old->config_ip, if_new->config_ip.enabled);
872 interface_ip_set_enabled(&if_old->proto_ip, false);
873 interface_ip_set_enabled(&if_old->proto_ip, if_new->proto_ip.enabled);
876 interface_write_resolv_conf();
879 if_new->config = NULL;
880 interface_cleanup(if_new);
886 interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
887 struct vlist_node *node_old)
889 struct interface *if_old = container_of(node_old, struct interface, node);
890 struct interface *if_new = container_of(node_new, struct interface, node);
892 if (node_old && node_new) {
893 D(INTERFACE, "Update interface '%s'\n", if_new->name);
894 interface_change_config(if_old, if_new);
895 } else if (node_old) {
896 D(INTERFACE, "Remove interface '%s'\n", if_old->name);
897 set_config_state(if_old, IFC_REMOVE);
898 } else if (node_new) {
899 D(INTERFACE, "Create interface '%s'\n", if_new->name);
900 proto_init_interface(if_new, if_new->config);
901 interface_claim_device(if_new);
902 netifd_ubus_add_interface(if_new);
908 interface_init_list(void)
910 vlist_init(&interfaces, avl_strcmp, interface_update);
911 interfaces.keep_old = true;
912 interfaces.no_delete = true;