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,
43 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
44 [IFACE_ATTR_PROTO] = { .name = "proto", .type = BLOBMSG_TYPE_STRING },
45 [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
46 [IFACE_ATTR_AUTO] = { .name = "auto", .type = BLOBMSG_TYPE_BOOL },
47 [IFACE_ATTR_DEFAULTROUTE] = { .name = "defaultroute", .type = BLOBMSG_TYPE_BOOL },
48 [IFACE_ATTR_PEERDNS] = { .name = "peerdns", .type = BLOBMSG_TYPE_BOOL },
49 [IFACE_ATTR_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
50 [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
51 [IFACE_ATTR_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
52 [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
55 static const union config_param_info iface_attr_info[IFACE_ATTR_MAX] = {
56 [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
59 const struct config_param_list interface_attr_list = {
60 .n_params = IFACE_ATTR_MAX,
61 .params = iface_attrs,
62 .info = iface_attr_info,
66 interface_clear_errors(struct interface *iface)
68 struct interface_error *error, *tmp;
70 list_for_each_entry_safe(error, tmp, &iface->errors, list) {
71 list_del(&error->list);
76 void interface_add_error(struct interface *iface, const char *subsystem,
77 const char *code, const char **data, int n_data)
79 struct interface_error *error;
85 len = n_data * sizeof(char *);
86 datalen = alloca(len);
87 for (i = 0; i < n_data; i++) {
88 datalen[i] = strlen(data[i]) + 1;
93 error = calloc(1, sizeof(*error) + sizeof(char *) + len);
97 list_add_tail(&error->list, &iface->errors);
98 error->subsystem = subsystem;
101 dest = (char *) &error->data[n_data + 1];
102 for (i = 0; i < n_data; i++) {
103 error->data[i] = dest;
104 memcpy(dest, data[i], datalen[i]);
107 error->data[n_data] = NULL;
111 interface_data_del(struct interface *iface, struct interface_data *data)
113 avl_delete(&iface->data, &data->node);
118 interface_data_flush(struct interface *iface)
120 struct interface_data *d, *tmp;
122 avl_for_each_element_safe(&iface->data, d, node, tmp)
123 interface_data_del(iface, d);
127 interface_add_data(struct interface *iface, const struct blob_attr *data)
129 struct interface_data *n, *o;
131 if (!blobmsg_check_attr(data, true))
132 return UBUS_STATUS_INVALID_ARGUMENT;
134 n = calloc(1, sizeof(*n) + blob_pad_len(data));
135 memcpy(n->data, data, blob_pad_len(data));
136 n->node.key = blobmsg_name(data);
138 o = avl_find_element(&iface->data, n->node.key, o, node);
140 interface_data_del(iface, o);
142 avl_insert(&iface->data, &n->node);
147 interface_event(struct interface *iface, enum interface_event ev)
149 struct interface_user *dep, *tmp;
150 struct device *adev = NULL;
152 list_for_each_entry_safe(dep, tmp, &iface->users, list)
153 dep->cb(dep, iface, ev);
155 list_for_each_entry_safe(dep, tmp, &iface_all_users, list)
156 dep->cb(dep, iface, ev);
160 adev = iface->main_dev.dev;
163 alias_notify_device(iface->name, adev);
171 interface_flush_state(struct interface *iface)
173 if (iface->l3_dev.dev)
174 device_release(&iface->l3_dev);
175 interface_data_flush(iface);
179 mark_interface_down(struct interface *iface)
181 enum interface_state state = iface->state;
183 iface->state = IFS_DOWN;
185 interface_event(iface, IFEV_DOWN);
186 interface_ip_set_enabled(&iface->config_ip, false);
187 interface_ip_flush(&iface->proto_ip);
188 interface_flush_state(iface);
189 system_flush_routes();
193 __interface_set_down(struct interface *iface, bool force)
195 interface_clear_errors(iface);
197 if (iface->state == IFS_DOWN ||
198 iface->state == IFS_TEARDOWN)
201 if (iface->state == IFS_UP)
202 interface_event(iface, IFEV_DOWN);
203 iface->state = IFS_TEARDOWN;
204 interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, force);
206 interface_flush_state(iface);
210 interface_cb(struct device_user *dep, enum device_event ev)
212 struct interface *iface;
215 iface = container_of(dep, struct interface, main_dev);
220 case DEV_EVENT_REMOVE:
227 interface_set_available(iface, new_state);
228 if (!new_state && dep->dev->external)
229 interface_set_main_dev(iface, NULL);
233 interface_set_available(struct interface *iface, bool new_state)
235 if (iface->available == new_state)
238 D(INTERFACE, "Interface '%s', available=%d\n", iface->name, new_state);
239 iface->available = new_state;
242 if (iface->autostart && !config_init)
243 interface_set_up(iface);
245 __interface_set_down(iface, true);
249 interface_add_user(struct interface_user *dep, struct interface *iface)
252 list_add(&dep->list, &iface_all_users);
257 list_add(&dep->list, &iface->users);
258 if (iface->state == IFS_UP)
259 dep->cb(dep, iface, IFEV_UP);
263 interface_remove_user(struct interface_user *dep)
265 list_del_init(&dep->list);
270 interface_alias_cb(struct interface_user *dep, struct interface *iface, enum interface_event ev)
272 struct interface *alias = container_of(dep, struct interface, parent_iface);
273 struct device *dev = iface->l3_dev.dev;
280 interface_set_main_dev(alias, dev);
281 interface_set_available(alias, true);
284 interface_set_available(alias, false);
285 interface_set_main_dev(alias, NULL);
288 interface_remove_user(dep);
296 interface_claim_device(struct interface *iface)
298 struct interface *parent;
299 struct device *dev = NULL;
301 if (iface->parent_iface.iface)
302 interface_remove_user(&iface->parent_iface);
304 if (iface->parent_ifname) {
305 parent = vlist_find(&interfaces, iface->parent_ifname, parent, node);
306 iface->parent_iface.cb = interface_alias_cb;
307 interface_add_user(&iface->parent_iface, parent);
308 } else if (iface->ifname &&
309 !(iface->proto_handler->flags & PROTO_FLAG_NODEV)) {
310 dev = device_get(iface->ifname, true);
314 interface_set_main_dev(iface, dev);
316 if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
317 interface_set_available(iface, true);
322 interface_cleanup(struct interface *iface, bool reload)
324 struct interface_user *dep, *tmp;
326 if (iface->parent_iface.iface)
327 interface_remove_user(&iface->parent_iface);
329 list_for_each_entry_safe(dep, tmp, &iface->users, list)
330 interface_remove_user(dep);
332 interface_ip_flush(&iface->config_ip);
333 interface_flush_state(iface);
334 interface_clear_errors(iface);
336 if (iface->main_dev.dev && !reload)
337 interface_set_main_dev(iface, NULL);
338 interface_set_proto_state(iface, NULL);
342 interface_do_free(struct interface *iface)
344 interface_event(iface, IFEV_FREE);
345 interface_cleanup(iface, false);
347 netifd_ubus_remove_interface(iface);
348 avl_delete(&interfaces.avl, &iface->node.avl);
353 interface_do_reload(struct interface *iface)
355 interface_event(iface, IFEV_RELOAD);
356 interface_cleanup(iface, true);
357 proto_init_interface(iface, iface->config);
358 interface_claim_device(iface);
362 interface_handle_config_change(struct interface *iface)
364 enum interface_config_state state = iface->config_state;
366 iface->config_state = IFC_NORMAL;
371 interface_do_reload(iface);
374 interface_do_free(iface);
377 if (iface->autostart && iface->available)
378 interface_set_up(iface);
382 interface_proto_cb(struct interface_proto_state *state, enum interface_proto_event ev)
384 struct interface *iface = state->iface;
388 if (iface->state != IFS_SETUP)
391 interface_ip_set_enabled(&iface->config_ip, true);
392 system_flush_routes();
393 iface->state = IFS_UP;
394 iface->start_time = system_get_rtime();
395 interface_event(iface, IFEV_UP);
396 interface_write_resolv_conf();
397 netifd_log_message(L_NOTICE, "Interface '%s' is now up\n", iface->name);
400 if (iface->state == IFS_DOWN)
403 netifd_log_message(L_NOTICE, "Interface '%s' is now down\n", iface->name);
404 mark_interface_down(iface);
405 if (iface->main_dev.dev)
406 device_release(&iface->main_dev);
407 interface_handle_config_change(iface);
409 case IFPEV_LINK_LOST:
410 if (iface->state != IFS_UP)
413 netifd_log_message(L_NOTICE, "Interface '%s' has lost the connection\n", iface->name);
414 mark_interface_down(iface);
415 iface->state = IFS_SETUP;
420 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state)
423 iface->proto->free(iface->proto);
426 iface->state = IFS_DOWN;
427 iface->proto = state;
431 state->proto_event = interface_proto_cb;
432 state->iface = iface;
436 interface_init(struct interface *iface, const char *name,
437 struct blob_attr *config)
439 struct blob_attr *tb[IFACE_ATTR_MAX];
440 struct blob_attr *cur;
441 const char *proto_name = NULL;
443 strncpy(iface->name, name, sizeof(iface->name) - 1);
444 INIT_LIST_HEAD(&iface->errors);
445 INIT_LIST_HEAD(&iface->users);
446 INIT_LIST_HEAD(&iface->hotplug_list);
447 interface_ip_init(iface);
448 avl_init(&iface->data, avl_strcmp, false, NULL);
449 iface->config_ip.enabled = false;
451 iface->main_dev.cb = interface_cb;
453 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
454 blob_data(config), blob_len(config));
456 if ((cur = tb[IFACE_ATTR_PROTO]))
457 proto_name = blobmsg_data(cur);
459 proto_attach_interface(iface, proto_name);
461 iface->autostart = blobmsg_get_bool_default(tb[IFACE_ATTR_AUTO], true);
462 iface->proto_ip.no_defaultroute =
463 !blobmsg_get_bool_default(tb[IFACE_ATTR_DEFAULTROUTE], true);
464 iface->proto_ip.no_dns =
465 !blobmsg_get_bool_default(tb[IFACE_ATTR_PEERDNS], true);
467 if ((cur = tb[IFACE_ATTR_DNS]))
468 interface_add_dns_server_list(&iface->config_ip, cur);
470 if ((cur = tb[IFACE_ATTR_DNS_SEARCH]))
471 interface_add_dns_search_list(&iface->config_ip, cur);
473 if ((cur = tb[IFACE_ATTR_METRIC]))
474 iface->metric = blobmsg_get_u32(cur);
476 iface->config_autostart = iface->autostart;
479 static bool __interface_add(struct interface *iface, struct blob_attr *config, bool alias)
481 struct blob_attr *tb[IFACE_ATTR_MAX];
482 struct blob_attr *cur;
484 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
485 blob_data(config), blob_len(config));
488 if ((cur = tb[IFACE_ATTR_INTERFACE]))
489 iface->parent_ifname = blobmsg_data(cur);
491 if (!iface->parent_ifname)
494 if ((cur = tb[IFACE_ATTR_IFNAME]))
495 iface->ifname = blobmsg_data(cur);
499 iface->config = config;
500 vlist_add(&interfaces, &iface->node, iface->name);
505 interface_add(struct interface *iface, struct blob_attr *config)
507 __interface_add(iface, config, false);
511 interface_add_alias(struct interface *iface, struct blob_attr *config)
513 if (iface->proto_handler->flags & PROTO_FLAG_NODEV)
516 return __interface_add(iface, config, true);
520 interface_set_l3_dev(struct interface *iface, struct device *dev)
522 bool enabled = iface->config_ip.enabled;
523 bool claimed = iface->l3_dev.claimed;
525 if (iface->l3_dev.dev == dev)
528 interface_ip_set_enabled(&iface->config_ip, false);
529 interface_ip_flush(&iface->proto_ip);
530 device_add_user(&iface->l3_dev, dev);
534 device_claim(&iface->l3_dev);
535 interface_ip_set_enabled(&iface->config_ip, enabled);
540 interface_set_main_dev(struct interface *iface, struct device *dev)
542 bool set_l3 = (iface->main_dev.dev == iface->l3_dev.dev);
543 bool claimed = iface->l3_dev.claimed;
545 if (iface->main_dev.dev == dev)
549 interface_set_l3_dev(iface, dev);
551 device_add_user(&iface->main_dev, dev);
553 device_claim(&iface->l3_dev);
555 if (!iface->l3_dev.dev)
556 interface_set_l3_dev(iface, dev);
560 interface_remove_link(struct interface *iface, struct device *dev)
562 struct device *mdev = iface->main_dev.dev;
564 if (mdev && mdev->hotplug_ops)
565 return mdev->hotplug_ops->del(mdev, dev);
567 if (!iface->main_dev.hotplug)
568 return UBUS_STATUS_INVALID_ARGUMENT;
570 if (dev != iface->main_dev.dev)
571 return UBUS_STATUS_INVALID_ARGUMENT;
573 device_remove_user(&iface->main_dev);
578 interface_add_link(struct interface *iface, struct device *dev)
580 struct device *mdev = iface->main_dev.dev;
585 if (iface->main_dev.hotplug)
586 device_remove_user(&iface->main_dev);
589 if (mdev->hotplug_ops)
590 return mdev->hotplug_ops->add(mdev, dev);
592 return UBUS_STATUS_NOT_SUPPORTED;
595 interface_set_main_dev(iface, dev);
596 iface->main_dev.hotplug = true;
601 interface_set_up(struct interface *iface)
605 iface->autostart = true;
607 if (iface->state != IFS_DOWN)
610 interface_clear_errors(iface);
611 if (!iface->available) {
612 interface_add_error(iface, "interface", "NO_DEVICE", NULL, 0);
616 if (iface->main_dev.dev) {
617 ret = device_claim(&iface->main_dev);
622 iface->state = IFS_SETUP;
623 ret = interface_proto_event(iface->proto, PROTO_CMD_SETUP, false);
625 mark_interface_down(iface);
633 interface_set_down(struct interface *iface)
636 vlist_for_each_element(&interfaces, iface, node)
637 __interface_set_down(iface, false);
639 iface->autostart = false;
640 __interface_set_down(iface, false);
647 interface_start_pending(void)
649 struct interface *iface;
651 vlist_for_each_element(&interfaces, iface, node) {
652 if (iface->available && iface->autostart)
653 interface_set_up(iface);
658 set_config_state(struct interface *iface, enum interface_config_state s)
660 iface->config_state = s;
661 if (iface->state == IFS_DOWN)
662 interface_handle_config_change(iface);
664 __interface_set_down(iface, false);
668 interface_update_start(struct interface *iface)
670 interface_ip_update_start(&iface->proto_ip);
674 interface_update_complete(struct interface *iface)
676 interface_ip_update_complete(&iface->proto_ip);
680 interface_replace_dns(struct interface_ip_settings *new, struct interface_ip_settings *old)
682 vlist_simple_replace(&new->dns_servers, &old->dns_servers);
683 vlist_simple_replace(&new->dns_search, &old->dns_search);
687 interface_change_config(struct interface *if_old, struct interface *if_new)
689 struct blob_attr *old_config = if_old->config;
690 const char *old_ifname = if_old->ifname;
691 const char *old_parent_ifname = if_old->parent_ifname;
692 const struct proto_handler *proto = if_old->proto_handler;
694 interface_clear_errors(if_old);
695 if_old->config = if_new->config;
696 if (!if_old->config_autostart && if_new->config_autostart)
697 if_old->autostart = true;
699 if_old->device_config = if_new->device_config;
700 if_old->config_autostart = if_new->config_autostart;
701 if_old->ifname = if_new->ifname;
702 if_old->parent_ifname = if_new->parent_ifname;
703 if_old->proto_handler = if_new->proto_handler;
705 #define FIELD_CHANGED_STR(field) \
706 ((!!if_old->field != !!old_ ## field) || \
708 strcmp(old_ ## field, if_old->field) != 0))
710 if (FIELD_CHANGED_STR(parent_ifname)) {
711 if (if_old->parent_iface.iface)
712 interface_remove_user(&if_old->parent_iface);
716 if (FIELD_CHANGED_STR(ifname) || proto != if_new->proto_handler) {
717 D(INTERFACE, "Reload interface '%s' because of ifname/proto change\n",
722 if (!proto->config_params)
723 D(INTERFACE, "No config parameters for interface '%s'\n",
725 else if (!config_check_equal(old_config, if_new->config,
726 proto->config_params)) {
727 D(INTERFACE, "Reload interface '%s because of config changes\n",
732 #define UPDATE(field) ({ \
733 bool __changed = (if_old->field != if_new->field); \
734 if_old->field = if_new->field; \
738 if (UPDATE(metric) || UPDATE(proto_ip.no_defaultroute)) {
739 interface_ip_set_enabled(&if_old->config_ip, false);
740 interface_ip_set_enabled(&if_old->config_ip, if_new->config_ip.enabled);
741 interface_ip_set_enabled(&if_old->proto_ip, false);
742 interface_ip_set_enabled(&if_old->proto_ip, if_new->proto_ip.enabled);
745 UPDATE(proto_ip.no_dns);
746 interface_replace_dns(&if_old->config_ip, &if_new->config_ip);
747 interface_write_resolv_conf();
754 set_config_state(if_old, IFC_RELOAD);
756 if_new->config = NULL;
757 interface_cleanup(if_new, false);
763 interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
764 struct vlist_node *node_old)
766 struct interface *if_old = container_of(node_old, struct interface, node);
767 struct interface *if_new = container_of(node_new, struct interface, node);
769 if (node_old && node_new) {
770 D(INTERFACE, "Update interface '%s'\n", if_new->name);
771 interface_change_config(if_old, if_new);
772 } else if (node_old) {
773 D(INTERFACE, "Remove interface '%s'\n", if_old->name);
774 set_config_state(if_old, IFC_REMOVE);
775 } else if (node_new) {
776 D(INTERFACE, "Create interface '%s'\n", if_new->name);
777 proto_init_interface(if_new, if_new->config);
778 interface_claim_device(if_new);
779 netifd_ubus_add_interface(if_new);
785 interface_init_list(void)
787 vlist_init(&interfaces, avl_strcmp, interface_update);
788 interfaces.keep_old = true;
789 interfaces.no_delete = true;