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;
83 int subsystem_len = 0, code_len = 0;
86 len = n_data * sizeof(char *);
87 datalen = alloca(len);
88 for (i = 0; i < n_data; i++) {
89 datalen[i] = strlen(data[i]) + 1;
95 subsystem_len = strlen(subsystem) + 1;
100 code_len = strlen(code) + 1;
104 error = calloc(1, sizeof(*error) + sizeof(char *) + len);
108 list_add_tail(&error->list, &iface->errors);
110 dest = (char *) &error->data[n_data + 1];
111 for (i = 0; i < n_data; i++) {
112 error->data[i] = dest;
113 memcpy(dest, data[i], datalen[i]);
116 error->data[n_data++] = NULL;
118 dest = (char *) &error->data[n_data];
120 error->subsystem = dest;
121 strcpy(dest, subsystem);
122 dest += subsystem_len;
133 interface_data_del(struct interface *iface, struct interface_data *data)
135 avl_delete(&iface->data, &data->node);
140 interface_data_flush(struct interface *iface)
142 struct interface_data *d, *tmp;
144 avl_for_each_element_safe(&iface->data, d, node, tmp)
145 interface_data_del(iface, d);
149 interface_add_data(struct interface *iface, const struct blob_attr *data)
151 struct interface_data *n, *o;
153 if (!blobmsg_check_attr(data, true))
154 return UBUS_STATUS_INVALID_ARGUMENT;
156 n = calloc(1, sizeof(*n) + blob_pad_len(data));
157 memcpy(n->data, data, blob_pad_len(data));
158 n->node.key = blobmsg_name(data);
160 o = avl_find_element(&iface->data, n->node.key, o, node);
162 interface_data_del(iface, o);
164 avl_insert(&iface->data, &n->node);
169 interface_event(struct interface *iface, enum interface_event ev)
171 struct interface_user *dep, *tmp;
172 struct device *adev = NULL;
174 list_for_each_entry_safe(dep, tmp, &iface->users, list)
175 dep->cb(dep, iface, ev);
177 list_for_each_entry_safe(dep, tmp, &iface_all_users, list)
178 dep->cb(dep, iface, ev);
182 adev = iface->main_dev.dev;
185 alias_notify_device(iface->name, adev);
193 interface_flush_state(struct interface *iface)
195 if (iface->l3_dev.dev)
196 device_release(&iface->l3_dev);
197 interface_data_flush(iface);
201 mark_interface_down(struct interface *iface)
203 enum interface_state state = iface->state;
205 iface->state = IFS_DOWN;
207 interface_event(iface, IFEV_DOWN);
208 interface_ip_set_enabled(&iface->config_ip, false);
209 interface_ip_flush(&iface->proto_ip);
210 interface_flush_state(iface);
211 system_flush_routes();
215 __interface_set_down(struct interface *iface, bool force)
217 interface_clear_errors(iface);
219 if (iface->state == IFS_DOWN ||
220 iface->state == IFS_TEARDOWN)
223 if (iface->state == IFS_UP)
224 interface_event(iface, IFEV_DOWN);
225 iface->state = IFS_TEARDOWN;
226 interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, force);
228 interface_flush_state(iface);
232 interface_cb(struct device_user *dep, enum device_event ev)
234 struct interface *iface;
237 iface = container_of(dep, struct interface, main_dev);
242 case DEV_EVENT_REMOVE:
249 interface_set_available(iface, new_state);
250 if (!new_state && dep->dev->external)
251 interface_set_main_dev(iface, NULL);
255 interface_set_available(struct interface *iface, bool new_state)
257 if (iface->available == new_state)
260 D(INTERFACE, "Interface '%s', available=%d\n", iface->name, new_state);
261 iface->available = new_state;
264 if (iface->autostart && !config_init)
265 interface_set_up(iface);
267 __interface_set_down(iface, true);
271 interface_add_user(struct interface_user *dep, struct interface *iface)
274 list_add(&dep->list, &iface_all_users);
279 list_add(&dep->list, &iface->users);
280 if (iface->state == IFS_UP)
281 dep->cb(dep, iface, IFEV_UP);
285 interface_remove_user(struct interface_user *dep)
287 list_del_init(&dep->list);
292 interface_alias_cb(struct interface_user *dep, struct interface *iface, enum interface_event ev)
294 struct interface *alias = container_of(dep, struct interface, parent_iface);
295 struct device *dev = iface->l3_dev.dev;
302 interface_set_main_dev(alias, dev);
303 interface_set_available(alias, true);
306 interface_set_available(alias, false);
307 interface_set_main_dev(alias, NULL);
310 interface_remove_user(dep);
318 interface_claim_device(struct interface *iface)
320 struct interface *parent;
321 struct device *dev = NULL;
323 if (iface->parent_iface.iface)
324 interface_remove_user(&iface->parent_iface);
326 if (iface->parent_ifname) {
327 parent = vlist_find(&interfaces, iface->parent_ifname, parent, node);
328 iface->parent_iface.cb = interface_alias_cb;
329 interface_add_user(&iface->parent_iface, parent);
330 } else if (iface->ifname &&
331 !(iface->proto_handler->flags & PROTO_FLAG_NODEV)) {
332 dev = device_get(iface->ifname, true);
336 interface_set_main_dev(iface, dev);
338 if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
339 interface_set_available(iface, true);
344 interface_cleanup(struct interface *iface, bool reload)
346 struct interface_user *dep, *tmp;
348 if (iface->parent_iface.iface)
349 interface_remove_user(&iface->parent_iface);
351 list_for_each_entry_safe(dep, tmp, &iface->users, list)
352 interface_remove_user(dep);
354 interface_ip_flush(&iface->config_ip);
355 interface_flush_state(iface);
356 interface_clear_errors(iface);
358 if (iface->main_dev.dev && !reload)
359 interface_set_main_dev(iface, NULL);
360 interface_set_proto_state(iface, NULL);
364 interface_do_free(struct interface *iface)
366 interface_event(iface, IFEV_FREE);
367 interface_cleanup(iface, false);
369 netifd_ubus_remove_interface(iface);
370 avl_delete(&interfaces.avl, &iface->node.avl);
375 interface_do_reload(struct interface *iface)
377 interface_event(iface, IFEV_RELOAD);
378 interface_cleanup(iface, true);
379 proto_init_interface(iface, iface->config);
380 interface_claim_device(iface);
384 interface_handle_config_change(struct interface *iface)
386 enum interface_config_state state = iface->config_state;
388 iface->config_state = IFC_NORMAL;
393 interface_do_reload(iface);
396 interface_do_free(iface);
399 if (iface->autostart && iface->available)
400 interface_set_up(iface);
404 interface_proto_cb(struct interface_proto_state *state, enum interface_proto_event ev)
406 struct interface *iface = state->iface;
410 if (iface->state != IFS_SETUP)
413 interface_ip_set_enabled(&iface->config_ip, true);
414 system_flush_routes();
415 iface->state = IFS_UP;
416 iface->start_time = system_get_rtime();
417 interface_event(iface, IFEV_UP);
418 netifd_log_message(L_NOTICE, "Interface '%s' is now up\n", iface->name);
421 if (iface->state == IFS_DOWN)
424 netifd_log_message(L_NOTICE, "Interface '%s' is now down\n", iface->name);
425 mark_interface_down(iface);
426 if (iface->main_dev.dev)
427 device_release(&iface->main_dev);
428 interface_handle_config_change(iface);
430 case IFPEV_LINK_LOST:
431 if (iface->state != IFS_UP)
434 netifd_log_message(L_NOTICE, "Interface '%s' has lost the connection\n", iface->name);
435 mark_interface_down(iface);
436 iface->state = IFS_SETUP;
440 interface_write_resolv_conf();
443 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state)
446 iface->proto->free(iface->proto);
449 iface->state = IFS_DOWN;
450 iface->proto = state;
454 state->proto_event = interface_proto_cb;
455 state->iface = iface;
459 interface_init(struct interface *iface, const char *name,
460 struct blob_attr *config)
462 struct blob_attr *tb[IFACE_ATTR_MAX];
463 struct blob_attr *cur;
464 const char *proto_name = NULL;
466 strncpy(iface->name, name, sizeof(iface->name) - 1);
467 INIT_LIST_HEAD(&iface->errors);
468 INIT_LIST_HEAD(&iface->users);
469 INIT_LIST_HEAD(&iface->hotplug_list);
470 interface_ip_init(iface);
471 avl_init(&iface->data, avl_strcmp, false, NULL);
472 iface->config_ip.enabled = false;
474 iface->main_dev.cb = interface_cb;
476 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
477 blob_data(config), blob_len(config));
479 if ((cur = tb[IFACE_ATTR_PROTO]))
480 proto_name = blobmsg_data(cur);
482 proto_attach_interface(iface, proto_name);
484 iface->autostart = blobmsg_get_bool_default(tb[IFACE_ATTR_AUTO], true);
485 iface->proto_ip.no_defaultroute =
486 !blobmsg_get_bool_default(tb[IFACE_ATTR_DEFAULTROUTE], true);
487 iface->proto_ip.no_dns =
488 !blobmsg_get_bool_default(tb[IFACE_ATTR_PEERDNS], true);
490 if ((cur = tb[IFACE_ATTR_DNS]))
491 interface_add_dns_server_list(&iface->config_ip, cur);
493 if ((cur = tb[IFACE_ATTR_DNS_SEARCH]))
494 interface_add_dns_search_list(&iface->config_ip, cur);
496 if ((cur = tb[IFACE_ATTR_METRIC]))
497 iface->metric = blobmsg_get_u32(cur);
499 iface->config_autostart = iface->autostart;
502 static bool __interface_add(struct interface *iface, struct blob_attr *config, bool alias)
504 struct blob_attr *tb[IFACE_ATTR_MAX];
505 struct blob_attr *cur;
507 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
508 blob_data(config), blob_len(config));
511 if ((cur = tb[IFACE_ATTR_INTERFACE]))
512 iface->parent_ifname = blobmsg_data(cur);
514 if (!iface->parent_ifname)
517 if ((cur = tb[IFACE_ATTR_IFNAME]))
518 iface->ifname = blobmsg_data(cur);
522 iface->config = config;
523 vlist_add(&interfaces, &iface->node, iface->name);
528 interface_add(struct interface *iface, struct blob_attr *config)
530 __interface_add(iface, config, false);
534 interface_add_alias(struct interface *iface, struct blob_attr *config)
536 if (iface->proto_handler->flags & PROTO_FLAG_NODEV)
539 return __interface_add(iface, config, true);
543 interface_set_l3_dev(struct interface *iface, struct device *dev)
545 bool enabled = iface->config_ip.enabled;
546 bool claimed = iface->l3_dev.claimed;
548 if (iface->l3_dev.dev == dev)
551 interface_ip_set_enabled(&iface->config_ip, false);
552 interface_ip_flush(&iface->proto_ip);
553 device_add_user(&iface->l3_dev, dev);
557 device_claim(&iface->l3_dev);
558 interface_ip_set_enabled(&iface->config_ip, enabled);
563 interface_set_main_dev(struct interface *iface, struct device *dev)
565 bool set_l3 = (iface->main_dev.dev == iface->l3_dev.dev);
566 bool claimed = iface->l3_dev.claimed;
568 if (iface->main_dev.dev == dev)
572 interface_set_l3_dev(iface, dev);
574 device_add_user(&iface->main_dev, dev);
576 device_claim(&iface->l3_dev);
578 if (!iface->l3_dev.dev)
579 interface_set_l3_dev(iface, dev);
583 interface_remove_link(struct interface *iface, struct device *dev)
585 struct device *mdev = iface->main_dev.dev;
587 if (mdev && mdev->hotplug_ops)
588 return mdev->hotplug_ops->del(mdev, dev);
590 if (!iface->main_dev.hotplug)
591 return UBUS_STATUS_INVALID_ARGUMENT;
593 if (dev != iface->main_dev.dev)
594 return UBUS_STATUS_INVALID_ARGUMENT;
596 device_remove_user(&iface->main_dev);
601 interface_add_link(struct interface *iface, struct device *dev)
603 struct device *mdev = iface->main_dev.dev;
608 if (iface->main_dev.hotplug)
609 device_remove_user(&iface->main_dev);
612 if (mdev->hotplug_ops)
613 return mdev->hotplug_ops->add(mdev, dev);
615 return UBUS_STATUS_NOT_SUPPORTED;
618 interface_set_main_dev(iface, dev);
619 iface->main_dev.hotplug = true;
624 interface_set_up(struct interface *iface)
628 iface->autostart = true;
630 if (iface->state != IFS_DOWN)
633 interface_clear_errors(iface);
634 if (!iface->available) {
635 interface_add_error(iface, "interface", "NO_DEVICE", NULL, 0);
639 if (iface->main_dev.dev) {
640 ret = device_claim(&iface->main_dev);
645 iface->state = IFS_SETUP;
646 ret = interface_proto_event(iface->proto, PROTO_CMD_SETUP, false);
648 mark_interface_down(iface);
656 interface_set_down(struct interface *iface)
659 vlist_for_each_element(&interfaces, iface, node)
660 __interface_set_down(iface, false);
662 iface->autostart = false;
663 __interface_set_down(iface, false);
670 interface_start_pending(void)
672 struct interface *iface;
674 vlist_for_each_element(&interfaces, iface, node) {
675 if (iface->available && iface->autostart)
676 interface_set_up(iface);
681 set_config_state(struct interface *iface, enum interface_config_state s)
683 iface->config_state = s;
684 if (iface->state == IFS_DOWN)
685 interface_handle_config_change(iface);
687 __interface_set_down(iface, false);
691 interface_update_start(struct interface *iface)
693 interface_ip_update_start(&iface->proto_ip);
697 interface_update_complete(struct interface *iface)
699 interface_ip_update_complete(&iface->proto_ip);
703 interface_replace_dns(struct interface_ip_settings *new, struct interface_ip_settings *old)
705 vlist_simple_replace(&new->dns_servers, &old->dns_servers);
706 vlist_simple_replace(&new->dns_search, &old->dns_search);
710 interface_change_config(struct interface *if_old, struct interface *if_new)
712 struct blob_attr *old_config = if_old->config;
713 const char *old_ifname = if_old->ifname;
714 const char *old_parent_ifname = if_old->parent_ifname;
715 const struct proto_handler *proto = if_old->proto_handler;
717 interface_clear_errors(if_old);
718 if_old->config = if_new->config;
719 if (!if_old->config_autostart && if_new->config_autostart)
720 if_old->autostart = true;
722 if_old->device_config = if_new->device_config;
723 if_old->config_autostart = if_new->config_autostart;
724 if_old->ifname = if_new->ifname;
725 if_old->parent_ifname = if_new->parent_ifname;
726 if_old->proto_handler = if_new->proto_handler;
728 #define FIELD_CHANGED_STR(field) \
729 ((!!if_old->field != !!old_ ## field) || \
731 strcmp(old_ ## field, if_old->field) != 0))
733 if (FIELD_CHANGED_STR(parent_ifname)) {
734 if (if_old->parent_iface.iface)
735 interface_remove_user(&if_old->parent_iface);
739 if (FIELD_CHANGED_STR(ifname) || proto != if_new->proto_handler) {
740 D(INTERFACE, "Reload interface '%s' because of ifname/proto change\n",
745 if (!proto->config_params)
746 D(INTERFACE, "No config parameters for interface '%s'\n",
748 else if (!config_check_equal(old_config, if_new->config,
749 proto->config_params)) {
750 D(INTERFACE, "Reload interface '%s because of config changes\n",
755 #define UPDATE(field) ({ \
756 bool __changed = (if_old->field != if_new->field); \
757 if_old->field = if_new->field; \
761 if (UPDATE(metric) || UPDATE(proto_ip.no_defaultroute)) {
762 interface_ip_set_enabled(&if_old->config_ip, false);
763 interface_ip_set_enabled(&if_old->config_ip, if_new->config_ip.enabled);
764 interface_ip_set_enabled(&if_old->proto_ip, false);
765 interface_ip_set_enabled(&if_old->proto_ip, if_new->proto_ip.enabled);
768 UPDATE(proto_ip.no_dns);
769 interface_replace_dns(&if_old->config_ip, &if_new->config_ip);
770 interface_write_resolv_conf();
777 set_config_state(if_old, IFC_RELOAD);
779 if_new->config = NULL;
780 interface_cleanup(if_new, false);
786 interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
787 struct vlist_node *node_old)
789 struct interface *if_old = container_of(node_old, struct interface, node);
790 struct interface *if_new = container_of(node_new, struct interface, node);
792 if (node_old && node_new) {
793 D(INTERFACE, "Update interface '%s'\n", if_new->name);
794 interface_change_config(if_old, if_new);
795 } else if (node_old) {
796 D(INTERFACE, "Remove interface '%s'\n", if_old->name);
797 set_config_state(if_old, IFC_REMOVE);
798 } else if (node_new) {
799 D(INTERFACE, "Create interface '%s'\n", if_new->name);
800 proto_init_interface(if_new, if_new->config);
801 interface_claim_device(if_new);
802 netifd_ubus_add_interface(if_new);
808 interface_init_list(void)
810 vlist_init(&interfaces, avl_strcmp, interface_update);
811 interfaces.keep_old = true;
812 interfaces.no_delete = true;