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 struct uci_blob_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 uci_blob_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);
225 vlist_delete(&interfaces, &iface->node);
229 interface_cb(struct device_user *dep, enum device_event ev)
231 struct interface *iface;
234 iface = container_of(dep, struct interface, main_dev);
239 case DEV_EVENT_REMOVE:
246 interface_set_available(iface, new_state);
247 if (!new_state && dep->dev->external)
248 interface_set_main_dev(iface, NULL);
252 interface_set_available(struct interface *iface, bool new_state)
254 if (iface->available == new_state)
257 D(INTERFACE, "Interface '%s', available=%d\n", iface->name, new_state);
258 iface->available = new_state;
261 if (iface->autostart && !config_init)
262 interface_set_up(iface);
264 __interface_set_down(iface, true);
268 interface_add_user(struct interface_user *dep, struct interface *iface)
271 list_add(&dep->list, &iface_all_users);
276 list_add(&dep->list, &iface->users);
277 if (iface->state == IFS_UP)
278 dep->cb(dep, iface, IFEV_UP);
282 interface_remove_user(struct interface_user *dep)
284 list_del_init(&dep->list);
289 interface_add_assignment_classes(struct interface *iface, struct blob_attr *list)
291 struct blob_attr *cur;
294 blobmsg_for_each_attr(cur, list, rem) {
295 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
298 if (!blobmsg_check_attr(cur, NULL))
301 struct interface_assignment_class *c = malloc(sizeof(*c) + blobmsg_data_len(cur));
302 memcpy(c->name, blobmsg_data(cur), blobmsg_data_len(cur));
303 list_add(&c->head, &iface->assignment_classes);
308 interface_clear_assignment_classes(struct interface *iface)
310 while (!list_empty(&iface->assignment_classes)) {
311 struct interface_assignment_class *c = list_first_entry(&iface->assignment_classes,
312 struct interface_assignment_class, head);
319 interface_merge_assignment_data(struct interface *old, struct interface *new)
321 bool changed = (old->assignment_hint != new->assignment_hint ||
322 old->assignment_length != new->assignment_length ||
323 list_empty(&old->assignment_classes) != list_empty(&new->assignment_classes));
325 struct interface_assignment_class *c;
326 list_for_each_entry(c, &new->assignment_classes, head) {
327 // Compare list entries one-by-one to see if there was a change
328 if (list_empty(&old->assignment_classes)) // The new list is longer
334 struct interface_assignment_class *c_old = list_first_entry(&old->assignment_classes,
335 struct interface_assignment_class, head);
337 if (strcmp(c_old->name, c->name)) // An entry didn't match
340 list_del(&c_old->head);
344 // The old list was longer than the new one or the last entry didn't match
345 if (!list_empty(&old->assignment_classes)) {
346 interface_clear_assignment_classes(old);
350 list_splice_init(&new->assignment_classes, &old->assignment_classes);
353 old->assignment_hint = new->assignment_hint;
354 old->assignment_length = new->assignment_length;
355 interface_refresh_assignments(true);
360 interface_alias_cb(struct interface_user *dep, struct interface *iface, enum interface_event ev)
362 struct interface *alias = container_of(dep, struct interface, parent_iface);
363 struct device *dev = iface->l3_dev.dev;
370 interface_set_main_dev(alias, dev);
371 interface_set_available(alias, true);
374 interface_set_available(alias, false);
375 interface_set_main_dev(alias, NULL);
378 interface_remove_user(dep);
386 interface_claim_device(struct interface *iface)
388 struct interface *parent;
389 struct device *dev = NULL;
391 if (iface->parent_iface.iface)
392 interface_remove_user(&iface->parent_iface);
394 if (iface->parent_ifname) {
395 parent = vlist_find(&interfaces, iface->parent_ifname, parent, node);
396 iface->parent_iface.cb = interface_alias_cb;
397 interface_add_user(&iface->parent_iface, parent);
398 } else if (iface->ifname &&
399 !(iface->proto_handler->flags & PROTO_FLAG_NODEV)) {
400 dev = device_get(iface->ifname, true);
404 interface_set_main_dev(iface, dev);
406 if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
407 interface_set_available(iface, true);
411 interface_cleanup_state(struct interface *iface)
413 interface_set_available(iface, false);
415 interface_flush_state(iface);
416 interface_clear_errors(iface);
417 interface_set_proto_state(iface, NULL);
419 if (iface->main_dev.dev)
420 interface_set_main_dev(iface, NULL);
424 interface_cleanup(struct interface *iface)
426 struct interface_user *dep, *tmp;
428 if (iface->parent_iface.iface)
429 interface_remove_user(&iface->parent_iface);
431 list_for_each_entry_safe(dep, tmp, &iface->users, list)
432 interface_remove_user(dep);
434 interface_clear_assignment_classes(iface);
435 interface_ip_flush(&iface->config_ip);
436 interface_cleanup_state(iface);
440 interface_do_free(struct interface *iface)
442 interface_event(iface, IFEV_FREE);
443 interface_cleanup(iface);
445 netifd_ubus_remove_interface(iface);
446 avl_delete(&interfaces.avl, &iface->node.avl);
451 interface_do_reload(struct interface *iface)
453 interface_event(iface, IFEV_RELOAD);
454 interface_cleanup_state(iface);
455 proto_init_interface(iface, iface->config);
456 interface_claim_device(iface);
460 interface_handle_config_change(struct interface *iface)
462 enum interface_config_state state = iface->config_state;
464 iface->config_state = IFC_NORMAL;
469 interface_do_reload(iface);
472 interface_do_free(iface);
475 if (iface->autostart && iface->available)
476 interface_set_up(iface);
480 interface_proto_cb(struct interface_proto_state *state, enum interface_proto_event ev)
482 struct interface *iface = state->iface;
486 if (iface->state != IFS_SETUP)
489 interface_ip_set_enabled(&iface->config_ip, true);
490 system_flush_routes();
491 iface->state = IFS_UP;
492 iface->start_time = system_get_rtime();
493 interface_event(iface, IFEV_UP);
494 netifd_log_message(L_NOTICE, "Interface '%s' is now up\n", iface->name);
497 if (iface->state == IFS_DOWN)
500 netifd_log_message(L_NOTICE, "Interface '%s' is now down\n", iface->name);
501 mark_interface_down(iface);
502 if (iface->main_dev.dev)
503 device_release(&iface->main_dev);
504 interface_handle_config_change(iface);
506 case IFPEV_LINK_LOST:
507 if (iface->state != IFS_UP)
510 netifd_log_message(L_NOTICE, "Interface '%s' has lost the connection\n", iface->name);
511 mark_interface_down(iface);
512 iface->state = IFS_SETUP;
516 interface_write_resolv_conf();
519 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state)
522 iface->proto->free(iface->proto);
525 iface->state = IFS_DOWN;
526 iface->proto = state;
530 state->proto_event = interface_proto_cb;
531 state->iface = iface;
535 interface_init(struct interface *iface, const char *name,
536 struct blob_attr *config, bool dynamic)
538 struct blob_attr *tb[IFACE_ATTR_MAX];
539 struct blob_attr *cur;
540 const char *proto_name = NULL;
542 strncpy(iface->name, name, sizeof(iface->name) - 1);
543 INIT_LIST_HEAD(&iface->errors);
544 INIT_LIST_HEAD(&iface->users);
545 INIT_LIST_HEAD(&iface->hotplug_list);
546 INIT_LIST_HEAD(&iface->assignment_classes);
547 interface_ip_init(iface);
548 avl_init(&iface->data, avl_strcmp, false, NULL);
549 iface->config_ip.enabled = false;
551 iface->main_dev.cb = interface_cb;
553 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
554 blob_data(config), blob_len(config));
556 if ((cur = tb[IFACE_ATTR_PROTO]))
557 proto_name = blobmsg_data(cur);
559 proto_attach_interface(iface, proto_name);
561 iface->autostart = blobmsg_get_bool_default(tb[IFACE_ATTR_AUTO], true);
562 iface->proto_ip.no_defaultroute =
563 !blobmsg_get_bool_default(tb[IFACE_ATTR_DEFAULTROUTE], true);
564 iface->proto_ip.no_dns =
565 !blobmsg_get_bool_default(tb[IFACE_ATTR_PEERDNS], true);
567 if ((cur = tb[IFACE_ATTR_DNS]))
568 interface_add_dns_server_list(&iface->config_ip, cur);
570 if ((cur = tb[IFACE_ATTR_DNS_SEARCH]))
571 interface_add_dns_search_list(&iface->config_ip, cur);
573 if ((cur = tb[IFACE_ATTR_METRIC]))
574 iface->metric = blobmsg_get_u32(cur);
576 if ((cur = tb[IFACE_ATTR_IP6ASSIGN]))
577 iface->assignment_length = blobmsg_get_u32(cur);
579 iface->assignment_hint = -1;
580 if ((cur = tb[IFACE_ATTR_IP6HINT]))
581 iface->assignment_hint = strtol(blobmsg_get_string(cur), NULL, 16) &
582 ~((1 << (64 - iface->assignment_length)) - 1);
584 if ((cur = tb[IFACE_ATTR_IP6CLASS]))
585 interface_add_assignment_classes(iface, cur);
588 if ((cur = tb[IFACE_ATTR_IP4TABLE])) {
589 if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip4table))
590 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
593 // Set a default exteranl routing table for IPv6 to do source-based-filtering
594 struct interface *iface_old = vlist_find(&interfaces, name, iface_old, node);
595 if (iface_old && iface_old->ip6table > 1000 && iface_old->ip6table < 2000)
596 iface->ip6table = iface_old->ip6table;
598 iface->ip6table = 1000 + ++interface_serial;
600 if ((cur = tb[IFACE_ATTR_IP6TABLE])) {
601 if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip6table))
602 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
605 iface->config_autostart = iface->autostart;
606 iface->dynamic = dynamic;
609 iface->node.version = -1; // Don't delete on reload
612 static bool __interface_add(struct interface *iface, struct blob_attr *config, bool alias)
614 struct blob_attr *tb[IFACE_ATTR_MAX];
615 struct blob_attr *cur;
617 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
618 blob_data(config), blob_len(config));
621 if ((cur = tb[IFACE_ATTR_INTERFACE]))
622 iface->parent_ifname = blobmsg_data(cur);
624 if (!iface->parent_ifname)
627 if ((cur = tb[IFACE_ATTR_IFNAME]))
628 iface->ifname = blobmsg_data(cur);
632 iface->config = config;
633 vlist_add(&interfaces, &iface->node, iface->name);
638 interface_add(struct interface *iface, struct blob_attr *config)
640 __interface_add(iface, config, false);
644 interface_add_alias(struct interface *iface, struct blob_attr *config)
646 if (iface->proto_handler->flags & PROTO_FLAG_NODEV)
649 return __interface_add(iface, config, true);
653 interface_set_l3_dev(struct interface *iface, struct device *dev)
655 bool enabled = iface->config_ip.enabled;
656 bool claimed = iface->l3_dev.claimed;
658 if (iface->l3_dev.dev == dev)
661 interface_ip_set_enabled(&iface->config_ip, false);
662 interface_ip_flush(&iface->proto_ip);
663 device_add_user(&iface->l3_dev, dev);
667 device_claim(&iface->l3_dev);
668 interface_ip_set_enabled(&iface->config_ip, enabled);
673 interface_set_main_dev(struct interface *iface, struct device *dev)
675 bool set_l3 = (iface->main_dev.dev == iface->l3_dev.dev);
676 bool claimed = iface->l3_dev.claimed;
678 if (iface->main_dev.dev == dev)
682 interface_set_l3_dev(iface, dev);
684 device_add_user(&iface->main_dev, dev);
689 device_claim(&iface->l3_dev);
691 if (!iface->l3_dev.dev)
692 interface_set_l3_dev(iface, dev);
696 interface_remove_link(struct interface *iface, struct device *dev)
698 struct device *mdev = iface->main_dev.dev;
700 if (mdev && mdev->hotplug_ops)
701 return mdev->hotplug_ops->del(mdev, dev);
703 if (!iface->main_dev.hotplug)
704 return UBUS_STATUS_INVALID_ARGUMENT;
706 if (dev != iface->main_dev.dev)
707 return UBUS_STATUS_INVALID_ARGUMENT;
709 device_remove_user(&iface->main_dev);
714 interface_add_link(struct interface *iface, struct device *dev)
716 struct device *mdev = iface->main_dev.dev;
721 if (iface->main_dev.hotplug)
722 device_remove_user(&iface->main_dev);
725 if (mdev->hotplug_ops)
726 return mdev->hotplug_ops->add(mdev, dev);
728 return UBUS_STATUS_NOT_SUPPORTED;
731 interface_set_main_dev(iface, dev);
732 iface->main_dev.hotplug = true;
737 interface_set_up(struct interface *iface)
741 iface->autostart = true;
743 if (iface->state != IFS_DOWN)
746 interface_clear_errors(iface);
747 if (!iface->available) {
748 interface_add_error(iface, "interface", "NO_DEVICE", NULL, 0);
752 if (iface->main_dev.dev) {
753 ret = device_claim(&iface->main_dev);
758 iface->state = IFS_SETUP;
759 ret = interface_proto_event(iface->proto, PROTO_CMD_SETUP, false);
761 mark_interface_down(iface);
769 interface_set_down(struct interface *iface)
772 vlist_for_each_element(&interfaces, iface, node)
773 __interface_set_down(iface, false);
775 iface->autostart = false;
776 __interface_set_down(iface, false);
783 interface_start_pending(void)
785 struct interface *iface;
787 vlist_for_each_element(&interfaces, iface, node) {
788 if (iface->available && iface->autostart)
789 interface_set_up(iface);
794 set_config_state(struct interface *iface, enum interface_config_state s)
796 iface->config_state = s;
797 if (iface->state == IFS_DOWN)
798 interface_handle_config_change(iface);
800 __interface_set_down(iface, false);
804 interface_update_start(struct interface *iface)
806 interface_ip_update_start(&iface->proto_ip);
810 interface_update_complete(struct interface *iface)
812 interface_ip_update_complete(&iface->proto_ip);
816 interface_replace_dns(struct interface_ip_settings *new, struct interface_ip_settings *old)
818 vlist_simple_replace(&new->dns_servers, &old->dns_servers);
819 vlist_simple_replace(&new->dns_search, &old->dns_search);
823 interface_change_config(struct interface *if_old, struct interface *if_new)
825 struct blob_attr *old_config = if_old->config;
826 bool reload = false, reload_ip = false;
828 #define FIELD_CHANGED_STR(field) \
829 ((!!if_old->field != !!if_new->field) || \
831 strcmp(if_old->field, if_new->field) != 0))
833 if (FIELD_CHANGED_STR(parent_ifname)) {
834 if (if_old->parent_iface.iface)
835 interface_remove_user(&if_old->parent_iface);
839 if (FIELD_CHANGED_STR(ifname) ||
840 if_old->proto_handler != if_new->proto_handler)
843 if (!if_old->proto_handler->config_params)
844 D(INTERFACE, "No config parameters for interface '%s'\n",
846 else if (!uci_blob_check_equal(if_old->config, if_new->config,
847 if_old->proto_handler->config_params))
850 #define UPDATE(field, __var) ({ \
851 bool __changed = (if_old->field != if_new->field); \
852 if_old->field = if_new->field; \
853 __var |= __changed; \
856 if_old->config = if_new->config;
857 if (!if_old->config_autostart && if_new->config_autostart)
858 if_old->autostart = true;
860 if_old->device_config = if_new->device_config;
861 if_old->config_autostart = if_new->config_autostart;
862 if_old->ifname = if_new->ifname;
863 if_old->parent_ifname = if_new->parent_ifname;
864 if_old->proto_handler = if_new->proto_handler;
866 if_old->proto_ip.no_dns = if_new->proto_ip.no_dns;
867 interface_replace_dns(&if_old->config_ip, &if_new->config_ip);
869 UPDATE(metric, reload_ip);
870 UPDATE(proto_ip.no_defaultroute, reload_ip);
871 UPDATE(ip4table, reload_ip);
872 UPDATE(ip6table, reload_ip);
873 interface_merge_assignment_data(if_old, if_new);
878 D(INTERFACE, "Reload interface '%s because of config changes\n",
880 interface_clear_errors(if_old);
881 set_config_state(if_old, IFC_RELOAD);
886 interface_ip_set_enabled(&if_old->config_ip, false);
887 interface_ip_set_enabled(&if_old->proto_ip, false);
888 interface_ip_set_enabled(&if_old->proto_ip, if_new->proto_ip.enabled);
889 interface_ip_set_enabled(&if_old->config_ip, if_new->config_ip.enabled);
892 interface_write_resolv_conf();
895 if_new->config = NULL;
896 interface_cleanup(if_new);
902 interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
903 struct vlist_node *node_old)
905 struct interface *if_old = container_of(node_old, struct interface, node);
906 struct interface *if_new = container_of(node_new, struct interface, node);
908 if (node_old && node_new) {
909 D(INTERFACE, "Update interface '%s'\n", if_new->name);
910 interface_change_config(if_old, if_new);
911 } else if (node_old) {
912 D(INTERFACE, "Remove interface '%s'\n", if_old->name);
913 set_config_state(if_old, IFC_REMOVE);
914 } else if (node_new) {
915 D(INTERFACE, "Create interface '%s'\n", if_new->name);
916 proto_init_interface(if_new, if_new->config);
917 interface_claim_device(if_new);
918 netifd_ubus_add_interface(if_new);
924 interface_init_list(void)
926 vlist_init(&interfaces, avl_strcmp, interface_update);
927 interfaces.keep_old = true;
928 interfaces.no_delete = true;