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);
34 IFACE_ATTR_DEFAULTROUTE,
37 IFACE_ATTR_DNS_SEARCH,
38 IFACE_ATTR_DNS_METRIC,
47 IFACE_ATTR_IP6IFACEID,
48 IFACE_ATTR_FORCE_LINK,
53 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
54 [IFACE_ATTR_PROTO] = { .name = "proto", .type = BLOBMSG_TYPE_STRING },
55 [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
56 [IFACE_ATTR_AUTO] = { .name = "auto", .type = BLOBMSG_TYPE_BOOL },
57 [IFACE_ATTR_DEFAULTROUTE] = { .name = "defaultroute", .type = BLOBMSG_TYPE_BOOL },
58 [IFACE_ATTR_PEERDNS] = { .name = "peerdns", .type = BLOBMSG_TYPE_BOOL },
59 [IFACE_ATTR_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
60 [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
61 [IFACE_ATTR_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
62 [IFACE_ATTR_DNS_METRIC] = { .name = "dns_metric", .type = BLOBMSG_TYPE_INT32 },
63 [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
64 [IFACE_ATTR_IP6ASSIGN] = { .name = "ip6assign", .type = BLOBMSG_TYPE_INT32 },
65 [IFACE_ATTR_IP6HINT] = { .name = "ip6hint", .type = BLOBMSG_TYPE_STRING },
66 [IFACE_ATTR_IP4TABLE] = { .name = "ip4table", .type = BLOBMSG_TYPE_STRING },
67 [IFACE_ATTR_IP6TABLE] = { .name = "ip6table", .type = BLOBMSG_TYPE_STRING },
68 [IFACE_ATTR_IP6CLASS] = { .name = "ip6class", .type = BLOBMSG_TYPE_ARRAY },
69 [IFACE_ATTR_DELEGATE] = { .name = "delegate", .type = BLOBMSG_TYPE_BOOL },
70 [IFACE_ATTR_IP6IFACEID] = { .name = "ip6ifaceid", .type = BLOBMSG_TYPE_STRING },
71 [IFACE_ATTR_FORCE_LINK] = { .name = "force_link", .type = BLOBMSG_TYPE_BOOL },
72 [IFACE_ATTR_IP6WEIGHT] = { .name = "ip6weight", .type = BLOBMSG_TYPE_INT32 },
75 const struct uci_blob_param_list interface_attr_list = {
76 .n_params = IFACE_ATTR_MAX,
77 .params = iface_attrs,
81 set_config_state(struct interface *iface, enum interface_config_state s);
83 interface_event(struct interface *iface, enum interface_event ev);
86 interface_error_flush(struct interface *iface)
88 struct interface_error *error, *tmp;
90 list_for_each_entry_safe(error, tmp, &iface->errors, list) {
91 list_del(&error->list);
97 interface_clear_errors(struct interface *iface)
99 /* don't flush the errors in case the configured protocol handler matches the
100 running protocol handler and is having the last error capability */
101 if (!(iface->proto &&
102 (iface->proto->handler->flags & PROTO_FLAG_LASTERROR) &&
103 (iface->proto->handler->name == iface->proto_handler->name)))
104 interface_error_flush(iface);
107 void interface_add_error(struct interface *iface, const char *subsystem,
108 const char *code, const char **data, int n_data)
110 struct interface_error *error;
113 char *dest, *d_subsys, *d_code;
115 /* if the configured protocol handler has the last error support capability,
116 errors should only be added if the running protocol handler matches the
119 (iface->proto->handler->flags & PROTO_FLAG_LASTERROR) &&
120 (iface->proto->handler->name != iface->proto_handler->name))
124 len = n_data * sizeof(char *);
125 datalen = alloca(len);
126 for (i = 0; i < n_data; i++) {
127 datalen[i] = strlen(data[i]) + 1;
132 error = calloc_a(sizeof(*error) + sizeof(char *) + len,
133 &d_subsys, subsystem ? strlen(subsystem) + 1 : 0,
134 &d_code, code ? strlen(code) + 1 : 0);
138 /* Only keep the last flagged error, prevent this list grows unlimitted in case the
139 protocol can't be established (e.g auth failure) */
140 if (iface->proto_handler->flags & PROTO_FLAG_LASTERROR)
141 interface_error_flush(iface);
143 list_add_tail(&error->list, &iface->errors);
145 dest = (char *) &error->data[n_data + 1];
146 for (i = 0; i < n_data; i++) {
147 error->data[i] = dest;
148 memcpy(dest, data[i], datalen[i]);
151 error->data[n_data] = NULL;
154 error->subsystem = strcpy(d_subsys, subsystem);
157 error->code = strcpy(d_code, code);
161 interface_data_del(struct interface *iface, struct interface_data *data)
163 avl_delete(&iface->data, &data->node);
168 interface_data_flush(struct interface *iface)
170 struct interface_data *d, *tmp;
172 avl_for_each_element_safe(&iface->data, d, node, tmp)
173 interface_data_del(iface, d);
177 interface_add_data(struct interface *iface, const struct blob_attr *data)
179 struct interface_data *n, *o;
181 if (!blobmsg_check_attr(data, true))
182 return UBUS_STATUS_INVALID_ARGUMENT;
184 const char *name = blobmsg_name(data);
185 unsigned len = blob_pad_len(data);
187 o = avl_find_element(&iface->data, name, o, node);
189 if (blob_pad_len(o->data) == len && !memcmp(o->data, data, len))
192 interface_data_del(iface, o);
195 n = calloc(1, sizeof(*n) + len);
197 return UBUS_STATUS_UNKNOWN_ERROR;
199 memcpy(n->data, data, len);
200 n->node.key = blobmsg_name(n->data);
201 avl_insert(&iface->data, &n->node);
203 iface->updated |= IUF_DATA;
207 int interface_parse_data(struct interface *iface, const struct blob_attr *attr)
209 struct blob_attr *cur;
214 blob_for_each_attr(cur, attr, rem) {
215 ret = interface_add_data(iface, cur);
220 if (iface->updated && iface->state == IFS_UP)
221 interface_event(iface, IFEV_UPDATE);
227 interface_event(struct interface *iface, enum interface_event ev)
229 struct interface_user *dep, *tmp;
230 struct device *adev = NULL;
232 list_for_each_entry_safe(dep, tmp, &iface->users, list)
233 dep->cb(dep, iface, ev);
235 list_for_each_entry_safe(dep, tmp, &iface_all_users, list)
236 dep->cb(dep, iface, ev);
240 interface_error_flush(iface);
241 adev = iface->l3_dev.dev;
244 alias_notify_device(iface->name, adev);
252 interface_flush_state(struct interface *iface)
254 if (iface->l3_dev.dev)
255 device_release(&iface->l3_dev);
256 interface_data_flush(iface);
260 mark_interface_down(struct interface *iface)
262 enum interface_state state = iface->state;
264 if (state == IFS_DOWN)
267 iface->link_up_event = false;
268 iface->state = IFS_DOWN;
270 interface_event(iface, IFEV_DOWN);
271 interface_ip_set_enabled(&iface->config_ip, false);
272 interface_ip_set_enabled(&iface->proto_ip, false);
273 interface_ip_flush(&iface->proto_ip);
274 interface_flush_state(iface);
275 system_flush_routes();
279 __interface_set_down(struct interface *iface, bool force)
281 enum interface_state state = iface->state;
285 iface->state = IFS_TEARDOWN;
287 interface_event(iface, IFEV_DOWN);
289 interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, force);
291 interface_flush_state(iface);
295 if (iface->main_dev.dev)
296 device_release(&iface->main_dev);
304 __interface_set_up(struct interface *iface)
308 netifd_log_message(L_NOTICE, "Interface '%s' is setting up now\n", iface->name);
310 iface->state = IFS_SETUP;
311 ret = interface_proto_event(iface->proto, PROTO_CMD_SETUP, false);
313 mark_interface_down(iface);
319 interface_check_state(struct interface *iface)
321 bool link_state = iface->link_state || iface->force_link;
323 switch (iface->state) {
326 if (!iface->enabled || !link_state) {
327 interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, false);
328 mark_interface_down(iface);
332 if (!iface->available)
335 if (iface->autostart && iface->enabled && link_state && !config_init)
336 __interface_set_up(iface);
344 interface_set_enabled(struct interface *iface, bool new_state)
346 if (iface->enabled == new_state)
349 netifd_log_message(L_NOTICE, "Interface '%s' is %s\n", iface->name, new_state ? "enabled" : "disabled");
350 iface->enabled = new_state;
351 interface_check_state(iface);
355 interface_set_link_state(struct interface *iface, bool new_state)
357 if (iface->link_state == new_state)
360 netifd_log_message(L_NOTICE, "Interface '%s' has link connectivity %s\n", iface->name, new_state ? "" : "loss");
361 iface->link_state = new_state;
362 interface_check_state(iface);
364 if (new_state && iface->force_link && iface->state == IFS_UP && !iface->link_up_event) {
365 interface_event(iface, IFEV_LINK_UP);
366 iface->link_up_event = true;
371 interface_ext_dev_cb(struct device_user *dep, enum device_event ev)
373 if (ev == DEV_EVENT_REMOVE)
374 device_remove_user(dep);
378 interface_main_dev_cb(struct device_user *dep, enum device_event ev)
380 struct interface *iface;
381 bool new_state = false;
383 iface = container_of(dep, struct interface, main_dev);
387 case DEV_EVENT_REMOVE:
388 interface_set_available(iface, new_state);
389 if (!new_state && dep->dev && dep->dev->external)
390 interface_set_main_dev(iface, NULL);
395 interface_set_enabled(iface, new_state);
397 case DEV_EVENT_LINK_UP:
399 case DEV_EVENT_LINK_DOWN:
400 interface_set_link_state(iface, new_state);
402 case DEV_EVENT_TOPO_CHANGE:
403 interface_proto_event(iface->proto, PROTO_CMD_RENEW, false);
411 interface_l3_dev_cb(struct device_user *dep, enum device_event ev)
413 struct interface *iface;
415 iface = container_of(dep, struct interface, l3_dev);
416 if (iface->l3_dev.dev == iface->main_dev.dev)
420 case DEV_EVENT_LINK_DOWN:
421 if (iface->proto_handler->flags & PROTO_FLAG_TEARDOWN_ON_L3_LINK_DOWN)
422 interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, false);
430 interface_set_available(struct interface *iface, bool new_state)
432 if (iface->available == new_state)
435 D(INTERFACE, "Interface '%s', available=%d\n", iface->name, new_state);
436 iface->available = new_state;
439 if (iface->autostart && !config_init)
440 interface_set_up(iface);
442 __interface_set_down(iface, true);
446 interface_add_user(struct interface_user *dep, struct interface *iface)
449 list_add(&dep->list, &iface_all_users);
454 list_add(&dep->list, &iface->users);
455 if (iface->state == IFS_UP)
456 dep->cb(dep, iface, IFEV_UP);
460 interface_remove_user(struct interface_user *dep)
462 list_del_init(&dep->list);
467 interface_add_assignment_classes(struct interface *iface, struct blob_attr *list)
469 struct blob_attr *cur;
472 blobmsg_for_each_attr(cur, list, rem) {
473 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
476 if (!blobmsg_check_attr(cur, NULL))
479 struct interface_assignment_class *c = malloc(sizeof(*c) + blobmsg_data_len(cur));
480 memcpy(c->name, blobmsg_data(cur), blobmsg_data_len(cur));
481 list_add(&c->head, &iface->assignment_classes);
486 interface_clear_assignment_classes(struct interface *iface)
488 while (!list_empty(&iface->assignment_classes)) {
489 struct interface_assignment_class *c = list_first_entry(&iface->assignment_classes,
490 struct interface_assignment_class, head);
497 interface_merge_assignment_data(struct interface *old, struct interface *new)
499 bool changed = (old->assignment_hint != new->assignment_hint ||
500 old->assignment_length != new->assignment_length ||
501 old->assignment_iface_id_selection != new->assignment_iface_id_selection ||
502 old->assignment_weight != new->assignment_weight ||
503 (old->assignment_iface_id_selection == IFID_FIXED &&
504 memcmp(&old->assignment_fixed_iface_id, &new->assignment_fixed_iface_id,
505 sizeof(old->assignment_fixed_iface_id))) ||
506 list_empty(&old->assignment_classes) != list_empty(&new->assignment_classes));
508 struct interface_assignment_class *c;
509 list_for_each_entry(c, &new->assignment_classes, head) {
510 // Compare list entries one-by-one to see if there was a change
511 if (list_empty(&old->assignment_classes)) // The new list is longer
517 struct interface_assignment_class *c_old = list_first_entry(&old->assignment_classes,
518 struct interface_assignment_class, head);
520 if (strcmp(c_old->name, c->name)) // An entry didn't match
523 list_del(&c_old->head);
527 // The old list was longer than the new one or the last entry didn't match
528 if (!list_empty(&old->assignment_classes)) {
529 interface_clear_assignment_classes(old);
533 list_splice_init(&new->assignment_classes, &old->assignment_classes);
536 old->assignment_hint = new->assignment_hint;
537 old->assignment_length = new->assignment_length;
538 old->assignment_iface_id_selection = new->assignment_iface_id_selection;
539 old->assignment_fixed_iface_id = new->assignment_fixed_iface_id;
540 old->assignment_weight = new->assignment_weight;
541 interface_refresh_assignments(true);
546 interface_alias_cb(struct interface_user *dep, struct interface *iface, enum interface_event ev)
548 struct interface *alias = container_of(dep, struct interface, parent_iface);
549 struct device *dev = iface->l3_dev.dev;
556 interface_set_main_dev(alias, dev);
557 interface_set_available(alias, true);
560 interface_set_available(alias, false);
561 interface_set_main_dev(alias, NULL);
564 interface_remove_user(dep);
572 interface_set_device_config(struct interface *iface, struct device *dev)
574 if (!dev || !dev->default_config)
577 if (!iface->device_config &&
578 (!dev->iface_config || dev->config_iface != iface))
581 dev->config_iface = iface;
582 dev->iface_config = iface->device_config;
583 device_apply_config(dev, dev->type, iface->config);
587 interface_claim_device(struct interface *iface)
589 struct interface *parent;
590 struct device *dev = NULL;
592 if (iface->parent_iface.iface)
593 interface_remove_user(&iface->parent_iface);
597 if (iface->parent_ifname) {
598 parent = vlist_find(&interfaces, iface->parent_ifname, parent, node);
599 iface->parent_iface.cb = interface_alias_cb;
600 interface_add_user(&iface->parent_iface, parent);
601 } else if (iface->ifname &&
602 !(iface->proto_handler->flags & PROTO_FLAG_NODEV)) {
603 dev = device_get(iface->ifname, true);
604 interface_set_device_config(iface, dev);
606 dev = iface->ext_dev.dev;
610 interface_set_main_dev(iface, dev);
614 if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
615 interface_set_available(iface, true);
619 interface_cleanup_state(struct interface *iface)
621 interface_set_available(iface, false);
623 interface_flush_state(iface);
624 interface_clear_errors(iface);
625 interface_set_proto_state(iface, NULL);
627 interface_set_main_dev(iface, NULL);
628 interface_set_l3_dev(iface, NULL);
632 interface_cleanup(struct interface *iface)
634 struct interface_user *dep, *tmp;
636 uloop_timeout_cancel(&iface->remove_timer);
637 device_remove_user(&iface->ext_dev);
639 if (iface->parent_iface.iface)
640 interface_remove_user(&iface->parent_iface);
642 list_for_each_entry_safe(dep, tmp, &iface->users, list)
643 interface_remove_user(dep);
645 interface_clear_assignment_classes(iface);
646 interface_ip_flush(&iface->config_ip);
647 interface_cleanup_state(iface);
651 interface_do_free(struct interface *iface)
653 interface_event(iface, IFEV_FREE);
654 interface_cleanup(iface);
656 netifd_ubus_remove_interface(iface);
657 avl_delete(&interfaces.avl, &iface->node.avl);
662 interface_do_reload(struct interface *iface)
664 interface_event(iface, IFEV_RELOAD);
665 interface_cleanup_state(iface);
666 proto_init_interface(iface, iface->config);
667 interface_claim_device(iface);
671 interface_handle_config_change(struct interface *iface)
673 enum interface_config_state state = iface->config_state;
675 iface->config_state = IFC_NORMAL;
680 interface_do_reload(iface);
683 interface_do_free(iface);
686 if (iface->autostart && iface->available)
687 interface_set_up(iface);
688 else if (iface->dynamic)
689 set_config_state(iface, IFC_REMOVE);
693 interface_proto_event_cb(struct interface_proto_state *state, enum interface_proto_event ev)
695 struct interface *iface = state->iface;
699 if (iface->state != IFS_SETUP) {
700 if (iface->state == IFS_UP && iface->updated)
701 interface_event(iface, IFEV_UPDATE);
705 if (!iface->l3_dev.dev)
706 interface_set_l3_dev(iface, iface->main_dev.dev);
708 interface_ip_set_enabled(&iface->config_ip, true);
709 interface_ip_set_enabled(&iface->proto_ip, true);
710 system_flush_routes();
711 iface->state = IFS_UP;
712 iface->start_time = system_get_rtime();
713 interface_event(iface, IFEV_UP);
714 netifd_log_message(L_NOTICE, "Interface '%s' is now up\n", iface->name);
717 if (iface->state == IFS_DOWN)
720 netifd_log_message(L_NOTICE, "Interface '%s' is now down\n", iface->name);
721 mark_interface_down(iface);
722 if (iface->main_dev.dev)
723 device_release(&iface->main_dev);
724 if (iface->l3_dev.dev)
725 device_remove_user(&iface->l3_dev);
726 interface_handle_config_change(iface);
728 case IFPEV_LINK_LOST:
729 if (iface->state != IFS_UP)
732 netifd_log_message(L_NOTICE, "Interface '%s' has lost the connection\n", iface->name);
733 mark_interface_down(iface);
734 iface->state = IFS_SETUP;
740 interface_write_resolv_conf();
743 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state)
746 iface->proto->free(iface->proto);
749 iface->state = IFS_DOWN;
750 iface->proto = state;
754 state->proto_event = interface_proto_event_cb;
755 state->iface = iface;
759 interface_alloc(const char *name, struct blob_attr *config)
761 struct interface *iface;
762 struct blob_attr *tb[IFACE_ATTR_MAX];
763 struct blob_attr *cur;
764 const char *proto_name = NULL;
766 bool force_link = false;
768 iface = calloc_a(sizeof(*iface), &iface_name, strlen(name) + 1);
769 iface->name = strcpy(iface_name, name);
770 INIT_LIST_HEAD(&iface->errors);
771 INIT_LIST_HEAD(&iface->users);
772 INIT_LIST_HEAD(&iface->hotplug_list);
773 INIT_LIST_HEAD(&iface->assignment_classes);
774 interface_ip_init(iface);
775 avl_init(&iface->data, avl_strcmp, false, NULL);
776 iface->config_ip.enabled = false;
778 iface->main_dev.cb = interface_main_dev_cb;
779 iface->l3_dev.cb = interface_l3_dev_cb;
780 iface->ext_dev.cb = interface_ext_dev_cb;
782 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
783 blob_data(config), blob_len(config));
785 if ((cur = tb[IFACE_ATTR_PROTO]))
786 proto_name = blobmsg_data(cur);
788 proto_attach_interface(iface, proto_name);
789 if (iface->proto_handler->flags & PROTO_FLAG_FORCE_LINK_DEFAULT)
792 iface->autostart = blobmsg_get_bool_default(tb[IFACE_ATTR_AUTO], true);
793 iface->force_link = blobmsg_get_bool_default(tb[IFACE_ATTR_FORCE_LINK], force_link);
794 iface->proto_ip.no_defaultroute =
795 !blobmsg_get_bool_default(tb[IFACE_ATTR_DEFAULTROUTE], true);
796 iface->proto_ip.no_dns =
797 !blobmsg_get_bool_default(tb[IFACE_ATTR_PEERDNS], true);
799 if ((cur = tb[IFACE_ATTR_DNS]))
800 interface_add_dns_server_list(&iface->config_ip, cur);
802 if ((cur = tb[IFACE_ATTR_DNS_SEARCH]))
803 interface_add_dns_search_list(&iface->config_ip, cur);
805 if ((cur = tb[IFACE_ATTR_DNS_METRIC]))
806 iface->dns_metric = blobmsg_get_u32(cur);
808 if ((cur = tb[IFACE_ATTR_METRIC]))
809 iface->metric = blobmsg_get_u32(cur);
811 if ((cur = tb[IFACE_ATTR_IP6ASSIGN]))
812 iface->assignment_length = blobmsg_get_u32(cur);
815 iface->assignment_iface_id_selection = IFID_FIXED;
816 iface->assignment_fixed_iface_id = in6addr_any;
817 iface->assignment_fixed_iface_id.s6_addr[15] = 1;
819 if ((cur = tb[IFACE_ATTR_IP6IFACEID])) {
820 const char *ifaceid = blobmsg_data(cur);
821 if (!strcmp(ifaceid, "random")) {
822 iface->assignment_iface_id_selection = IFID_RANDOM;
824 else if (!strcmp(ifaceid, "eui64")) {
825 iface->assignment_iface_id_selection = IFID_EUI64;
828 /* we expect an IPv6 address with network id zero here -> fixed iface id
829 if we cannot parse -> revert to iface id 1 */
830 if (inet_pton(AF_INET6,ifaceid,&iface->assignment_fixed_iface_id) != 1 ||
831 iface->assignment_fixed_iface_id.s6_addr32[0] != 0 ||
832 iface->assignment_fixed_iface_id.s6_addr32[1] != 0) {
833 iface->assignment_fixed_iface_id = in6addr_any;
834 iface->assignment_fixed_iface_id.s6_addr[15] = 1;
835 netifd_log_message(L_WARNING, "Failed to parse ip6ifaceid for interface '%s', \
836 falling back to iface id 1.\n", iface->name);
841 iface->assignment_hint = -1;
842 if ((cur = tb[IFACE_ATTR_IP6HINT]))
843 iface->assignment_hint = strtol(blobmsg_get_string(cur), NULL, 16) &
844 ~((1 << (64 - iface->assignment_length)) - 1);
846 if ((cur = tb[IFACE_ATTR_IP6CLASS]))
847 interface_add_assignment_classes(iface, cur);
849 if ((cur = tb[IFACE_ATTR_IP6WEIGHT]))
850 iface->assignment_weight = blobmsg_get_u32(cur);
852 if ((cur = tb[IFACE_ATTR_IP4TABLE])) {
853 if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip4table))
854 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
857 if ((cur = tb[IFACE_ATTR_IP6TABLE])) {
858 if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip6table))
859 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
862 iface->proto_ip.no_delegation = !blobmsg_get_bool_default(tb[IFACE_ATTR_DELEGATE], true);
864 iface->config_autostart = iface->autostart;
868 void interface_set_dynamic(struct interface *iface)
870 iface->dynamic = true;
871 iface->autostart = true;
872 iface->node.version = -1; // Don't delete on reload
875 static bool __interface_add(struct interface *iface, struct blob_attr *config, bool alias)
877 struct blob_attr *tb[IFACE_ATTR_MAX];
878 struct blob_attr *cur;
880 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
881 blob_data(config), blob_len(config));
884 if ((cur = tb[IFACE_ATTR_INTERFACE]))
885 iface->parent_ifname = blobmsg_data(cur);
887 if (!iface->parent_ifname)
890 if ((cur = tb[IFACE_ATTR_IFNAME]))
891 iface->ifname = blobmsg_data(cur);
894 iface->config = config;
895 vlist_add(&interfaces, &iface->node, iface->name);
900 interface_add(struct interface *iface, struct blob_attr *config)
902 __interface_add(iface, config, false);
906 interface_add_alias(struct interface *iface, struct blob_attr *config)
908 if (iface->proto_handler->flags & PROTO_FLAG_NODEV)
911 return __interface_add(iface, config, true);
915 interface_set_l3_dev(struct interface *iface, struct device *dev)
917 bool enabled = iface->config_ip.enabled;
918 bool claimed = iface->l3_dev.claimed;
920 if (iface->l3_dev.dev == dev)
923 interface_ip_set_enabled(&iface->config_ip, false);
924 interface_ip_set_enabled(&iface->proto_ip, false);
925 interface_ip_flush(&iface->proto_ip);
926 device_add_user(&iface->l3_dev, dev);
930 if (device_claim(&iface->l3_dev) < 0)
933 interface_ip_set_enabled(&iface->config_ip, enabled);
934 interface_ip_set_enabled(&iface->proto_ip, enabled);
939 interface_set_main_dev(struct interface *iface, struct device *dev)
941 bool claimed = iface->l3_dev.claimed;
943 if (iface->main_dev.dev == dev)
946 interface_set_available(iface, false);
947 device_add_user(&iface->main_dev, dev);
949 interface_set_link_state(iface, false);
954 if (device_claim(&iface->l3_dev) < 0)
958 if (!iface->l3_dev.dev)
959 interface_set_l3_dev(iface, dev);
963 interface_remove_link(struct interface *iface, struct device *dev)
965 struct device *mdev = iface->main_dev.dev;
967 if (mdev && mdev->hotplug_ops)
968 return mdev->hotplug_ops->del(mdev, dev);
970 if (dev == iface->ext_dev.dev)
971 device_remove_user(&iface->ext_dev);
973 if (!iface->main_dev.hotplug)
974 return UBUS_STATUS_INVALID_ARGUMENT;
976 if (dev != iface->main_dev.dev)
977 return UBUS_STATUS_INVALID_ARGUMENT;
979 interface_set_main_dev(iface, NULL);
984 interface_add_link(struct interface *iface, struct device *dev, bool link_ext)
986 struct device *mdev = iface->main_dev.dev;
991 if (iface->main_dev.hotplug)
992 device_remove_user(&iface->main_dev);
995 if (mdev->hotplug_ops)
996 return mdev->hotplug_ops->add(mdev, dev);
998 return UBUS_STATUS_NOT_SUPPORTED;
1002 device_add_user(&iface->ext_dev, dev);
1004 interface_set_main_dev(iface, dev);
1005 iface->main_dev.hotplug = true;
1010 interface_handle_link(struct interface *iface, const char *name, bool add, bool link_ext)
1017 dev = device_get(name, add ? (link_ext ? 2 : 1) : 0);
1019 ret = UBUS_STATUS_NOT_FOUND;
1024 interface_set_device_config(iface, dev);
1025 device_set_present(dev, true);
1027 ret = interface_add_link(iface, dev, link_ext);
1029 ret = interface_remove_link(iface, dev);
1039 interface_set_up(struct interface *iface)
1043 iface->autostart = true;
1045 if (iface->state != IFS_DOWN)
1048 interface_clear_errors(iface);
1049 if (!iface->available) {
1050 interface_add_error(iface, "interface", "NO_DEVICE", NULL, 0);
1054 if (iface->main_dev.dev) {
1055 ret = device_claim(&iface->main_dev);
1057 interface_check_state(iface);
1060 ret = __interface_set_up(iface);
1066 interface_set_down(struct interface *iface)
1069 vlist_for_each_element(&interfaces, iface, node)
1070 __interface_set_down(iface, false);
1072 iface->autostart = false;
1073 __interface_set_down(iface, false);
1080 interface_start_pending(void)
1082 struct interface *iface;
1084 vlist_for_each_element(&interfaces, iface, node) {
1085 if (iface->available && iface->autostart)
1086 interface_set_up(iface);
1091 set_config_state(struct interface *iface, enum interface_config_state s)
1093 iface->config_state = s;
1094 if (iface->state == IFS_DOWN)
1095 interface_handle_config_change(iface);
1097 __interface_set_down(iface, false);
1101 interface_update_start(struct interface *iface, const bool keep_old)
1106 interface_ip_update_start(&iface->proto_ip);
1110 interface_update_complete(struct interface *iface)
1112 interface_ip_update_complete(&iface->proto_ip);
1116 interface_replace_dns(struct interface_ip_settings *new, struct interface_ip_settings *old)
1118 vlist_simple_replace(&new->dns_servers, &old->dns_servers);
1119 vlist_simple_replace(&new->dns_search, &old->dns_search);
1123 interface_device_config_changed(struct interface *if_old, struct interface *if_new)
1125 struct blob_attr *ntb[__DEV_ATTR_MAX];
1126 struct blob_attr *otb[__DEV_ATTR_MAX];
1127 struct device *dev = if_old->main_dev.dev;
1128 unsigned long diff = 0;
1130 BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8);
1135 if (if_old->device_config != if_new->device_config)
1138 if (!if_new->device_config)
1141 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb,
1142 blob_data(if_old->config), blob_len(if_old->config));
1144 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, ntb,
1145 blob_data(if_new->config), blob_len(if_new->config));
1147 uci_blob_diff(ntb, otb, &device_attr_list, &diff);
1152 interface_change_config(struct interface *if_old, struct interface *if_new)
1154 struct blob_attr *old_config = if_old->config;
1155 bool reload = false, reload_ip = false;
1157 #define FIELD_CHANGED_STR(field) \
1158 ((!!if_old->field != !!if_new->field) || \
1160 strcmp(if_old->field, if_new->field) != 0))
1162 if (FIELD_CHANGED_STR(parent_ifname)) {
1163 if (if_old->parent_iface.iface)
1164 interface_remove_user(&if_old->parent_iface);
1168 if (!reload && interface_device_config_changed(if_old, if_new))
1171 if (FIELD_CHANGED_STR(ifname) ||
1172 if_old->proto_handler != if_new->proto_handler)
1175 if (!if_old->proto_handler->config_params)
1176 D(INTERFACE, "No config parameters for interface '%s'\n",
1178 else if (!uci_blob_check_equal(if_old->config, if_new->config,
1179 if_old->proto_handler->config_params))
1182 #define UPDATE(field, __var) ({ \
1183 bool __changed = (if_old->field != if_new->field); \
1184 if_old->field = if_new->field; \
1185 __var |= __changed; \
1188 if_old->config = if_new->config;
1189 if (if_old->config_autostart != if_new->config_autostart) {
1190 if (if_old->config_autostart)
1193 if_old->autostart = if_new->config_autostart;
1196 if_old->device_config = if_new->device_config;
1197 if_old->config_autostart = if_new->config_autostart;
1198 if_old->ifname = if_new->ifname;
1199 if_old->parent_ifname = if_new->parent_ifname;
1200 if_old->proto_handler = if_new->proto_handler;
1201 if_old->force_link = if_new->force_link;
1202 if_old->dns_metric = if_new->dns_metric;
1204 if_old->proto_ip.no_dns = if_new->proto_ip.no_dns;
1205 interface_replace_dns(&if_old->config_ip, &if_new->config_ip);
1207 UPDATE(metric, reload_ip);
1208 UPDATE(proto_ip.no_defaultroute, reload_ip);
1209 UPDATE(ip4table, reload_ip);
1210 UPDATE(ip6table, reload_ip);
1211 interface_merge_assignment_data(if_old, if_new);
1216 D(INTERFACE, "Reload interface '%s' because of config changes\n",
1218 interface_clear_errors(if_old);
1219 set_config_state(if_old, IFC_RELOAD);
1224 bool config_ip_enabled = if_old->config_ip.enabled;
1225 bool proto_ip_enabled = if_old->proto_ip.enabled;
1227 interface_ip_set_enabled(&if_old->config_ip, false);
1228 interface_ip_set_enabled(&if_old->proto_ip, false);
1229 interface_ip_set_enabled(&if_old->proto_ip, proto_ip_enabled);
1230 interface_ip_set_enabled(&if_old->config_ip, config_ip_enabled);
1233 interface_write_resolv_conf();
1234 if (if_old->main_dev.dev)
1235 interface_check_state(if_old);
1238 if_new->config = NULL;
1239 interface_cleanup(if_new);
1245 interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
1246 struct vlist_node *node_old)
1248 struct interface *if_old = container_of(node_old, struct interface, node);
1249 struct interface *if_new = container_of(node_new, struct interface, node);
1251 if (node_old && node_new) {
1252 D(INTERFACE, "Update interface '%s'\n", if_new->name);
1253 interface_change_config(if_old, if_new);
1254 } else if (node_old) {
1255 D(INTERFACE, "Remove interface '%s'\n", if_old->name);
1256 set_config_state(if_old, IFC_REMOVE);
1257 } else if (node_new) {
1258 D(INTERFACE, "Create interface '%s'\n", if_new->name);
1259 proto_init_interface(if_new, if_new->config);
1260 interface_claim_device(if_new);
1261 netifd_ubus_add_interface(if_new);
1267 interface_init_list(void)
1269 vlist_init(&interfaces, avl_strcmp, interface_update);
1270 interfaces.keep_old = true;
1271 interfaces.no_delete = true;