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,
42 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
43 [IFACE_ATTR_PROTO] = { .name = "proto", .type = BLOBMSG_TYPE_STRING },
44 [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
45 [IFACE_ATTR_AUTO] = { .name = "auto", .type = BLOBMSG_TYPE_BOOL },
46 [IFACE_ATTR_DEFAULTROUTE] = { .name = "defaultroute", .type = BLOBMSG_TYPE_BOOL },
47 [IFACE_ATTR_PEERDNS] = { .name = "peerdns", .type = BLOBMSG_TYPE_BOOL },
48 [IFACE_ATTR_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
49 [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
50 [IFACE_ATTR_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
53 static const union config_param_info iface_attr_info[IFACE_ATTR_MAX] = {
54 [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
57 const struct config_param_list interface_attr_list = {
58 .n_params = IFACE_ATTR_MAX,
59 .params = iface_attrs,
60 .info = iface_attr_info,
64 interface_clear_errors(struct interface *iface)
66 struct interface_error *error, *tmp;
68 list_for_each_entry_safe(error, tmp, &iface->errors, list) {
69 list_del(&error->list);
74 void interface_add_error(struct interface *iface, const char *subsystem,
75 const char *code, const char **data, int n_data)
77 struct interface_error *error;
83 len = n_data * sizeof(char *);
84 datalen = alloca(len);
85 for (i = 0; i < n_data; i++) {
86 datalen[i] = strlen(data[i]) + 1;
91 error = calloc(1, sizeof(*error) + sizeof(char *) + len);
95 list_add_tail(&error->list, &iface->errors);
96 error->subsystem = subsystem;
99 dest = (char *) &error->data[n_data + 1];
100 for (i = 0; i < n_data; i++) {
101 error->data[i] = dest;
102 memcpy(dest, data[i], datalen[i]);
105 error->data[n_data] = NULL;
109 interface_data_del(struct interface *iface, struct interface_data *data)
111 avl_delete(&iface->data, &data->node);
116 interface_data_flush(struct interface *iface)
118 struct interface_data *d, *tmp;
120 avl_for_each_element_safe(&iface->data, d, node, tmp)
121 interface_data_del(iface, d);
125 interface_add_data(struct interface *iface, const struct blob_attr *data)
127 struct interface_data *n, *o;
129 if (!blobmsg_check_attr(data, true))
130 return UBUS_STATUS_INVALID_ARGUMENT;
132 n = calloc(1, sizeof(*n) + blob_pad_len(data));
133 memcpy(n->data, data, blob_pad_len(data));
134 n->node.key = blobmsg_name(data);
136 o = avl_find_element(&iface->data, n->node.key, o, node);
138 interface_data_del(iface, o);
140 avl_insert(&iface->data, &n->node);
145 interface_event(struct interface *iface, enum interface_event ev)
147 struct interface_user *dep, *tmp;
149 list_for_each_entry_safe(dep, tmp, &iface->users, list)
150 dep->cb(dep, iface, ev);
152 list_for_each_entry_safe(dep, tmp, &iface_all_users, list)
153 dep->cb(dep, iface, ev);
157 interface_flush_state(struct interface *iface)
159 if (iface->main_dev.dev)
160 device_release(&iface->main_dev);
161 if (iface->l3_dev.dev)
162 device_release(&iface->l3_dev);
163 interface_data_flush(iface);
167 mark_interface_down(struct interface *iface)
169 if (iface->state == IFS_UP)
170 interface_event(iface, IFEV_DOWN);
171 interface_ip_set_enabled(&iface->config_ip, false);
172 interface_ip_flush(&iface->proto_ip);
173 interface_flush_state(iface);
174 system_flush_routes();
175 iface->state = IFS_DOWN;
179 __interface_set_down(struct interface *iface, bool force)
181 interface_clear_errors(iface);
183 if (iface->state == IFS_DOWN ||
184 iface->state == IFS_TEARDOWN)
187 if (iface->state == IFS_UP)
188 interface_event(iface, IFEV_DOWN);
189 iface->state = IFS_TEARDOWN;
190 interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, force);
192 interface_flush_state(iface);
196 interface_cb(struct device_user *dep, enum device_event ev)
198 struct interface *iface;
201 iface = container_of(dep, struct interface, main_dev);
206 case DEV_EVENT_REMOVE:
213 interface_set_available(iface, new_state);
217 interface_set_available(struct interface *iface, bool new_state)
219 if (iface->available == new_state)
222 D(INTERFACE, "Interface '%s', available=%d\n", iface->name, new_state);
223 iface->available = new_state;
226 if (iface->autostart && !config_init)
227 interface_set_up(iface);
229 __interface_set_down(iface, true);
233 interface_add_user(struct interface_user *dep, struct interface *iface)
236 list_add(&dep->list, &iface_all_users);
241 list_add(&dep->list, &iface->users);
242 if (iface->state == IFS_UP)
243 dep->cb(dep, iface, IFEV_UP);
247 interface_remove_user(struct interface_user *dep)
249 list_del_init(&dep->list);
254 interface_claim_device(struct interface *iface)
259 !(iface->proto_handler->flags & PROTO_FLAG_NODEV)) {
260 dev = device_get(iface->ifname, true);
262 interface_set_main_dev(iface, dev);
264 if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
265 interface_set_available(iface, true);
270 interface_cleanup(struct interface *iface, bool reload)
272 struct interface_user *dep, *tmp;
274 list_for_each_entry_safe(dep, tmp, &iface->users, list)
275 interface_remove_user(dep);
277 interface_ip_flush(&iface->config_ip);
278 interface_flush_state(iface);
279 interface_clear_errors(iface);
280 if (iface->main_dev.dev &&
281 (!reload || !iface->main_dev.hotplug))
282 interface_set_main_dev(iface, NULL);
283 interface_set_proto_state(iface, NULL);
287 interface_do_free(struct interface *iface)
289 interface_event(iface, IFEV_FREE);
290 interface_cleanup(iface, false);
292 netifd_ubus_remove_interface(iface);
293 avl_delete(&interfaces.avl, &iface->node.avl);
298 interface_do_reload(struct interface *iface)
300 interface_event(iface, IFEV_RELOAD);
301 interface_cleanup(iface, true);
302 proto_init_interface(iface, iface->config);
303 interface_claim_device(iface);
307 interface_handle_config_change(struct interface *iface)
309 enum interface_config_state state = iface->config_state;
311 iface->config_state = IFC_NORMAL;
316 interface_do_reload(iface);
319 interface_do_free(iface);
322 if (iface->autostart && iface->available)
323 interface_set_up(iface);
327 interface_proto_cb(struct interface_proto_state *state, enum interface_proto_event ev)
329 struct interface *iface = state->iface;
333 if (iface->state != IFS_SETUP)
336 interface_ip_set_enabled(&iface->config_ip, true);
337 system_flush_routes();
338 iface->state = IFS_UP;
339 iface->start_time = system_get_rtime();
340 interface_event(iface, IFEV_UP);
341 interface_write_resolv_conf();
342 netifd_log_message(L_NOTICE, "Interface '%s' is now up\n", iface->name);
345 if (iface->state == IFS_DOWN)
348 netifd_log_message(L_NOTICE, "Interface '%s' is now down\n", iface->name);
349 mark_interface_down(iface);
350 interface_handle_config_change(iface);
352 case IFPEV_LINK_LOST:
353 if (iface->state != IFS_UP)
356 netifd_log_message(L_NOTICE, "Interface '%s' has lost the connection\n", iface->name);
357 mark_interface_down(iface);
358 iface->state = IFS_SETUP;
363 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state)
366 iface->proto->free(iface->proto);
369 iface->state = IFS_DOWN;
370 iface->proto = state;
374 state->proto_event = interface_proto_cb;
375 state->iface = iface;
379 interface_init(struct interface *iface, const char *name,
380 struct blob_attr *config)
382 struct blob_attr *tb[IFACE_ATTR_MAX];
383 struct blob_attr *cur;
384 const char *proto_name = NULL;
386 strncpy(iface->name, name, sizeof(iface->name) - 1);
387 INIT_LIST_HEAD(&iface->errors);
388 INIT_LIST_HEAD(&iface->users);
389 INIT_LIST_HEAD(&iface->hotplug_list);
390 interface_ip_init(iface);
391 avl_init(&iface->data, avl_strcmp, false, NULL);
392 iface->config_ip.enabled = false;
394 iface->main_dev.cb = interface_cb;
396 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
397 blob_data(config), blob_len(config));
399 if ((cur = tb[IFACE_ATTR_PROTO]))
400 proto_name = blobmsg_data(cur);
402 proto_attach_interface(iface, proto_name);
404 iface->autostart = blobmsg_get_bool_default(tb[IFACE_ATTR_AUTO], true);
405 iface->proto_ip.no_defaultroute =
406 !blobmsg_get_bool_default(tb[IFACE_ATTR_DEFAULTROUTE], true);
407 iface->proto_ip.no_dns =
408 !blobmsg_get_bool_default(tb[IFACE_ATTR_PEERDNS], true);
410 if ((cur = tb[IFACE_ATTR_DNS]))
411 interface_add_dns_server_list(&iface->config_ip, cur);
413 if ((cur = tb[IFACE_ATTR_DNS_SEARCH]))
414 interface_add_dns_search_list(&iface->config_ip, cur);
416 if ((cur = tb[IFACE_ATTR_METRIC]))
417 iface->metric = blobmsg_get_u32(cur);
419 iface->config_autostart = iface->autostart;
423 interface_add(struct interface *iface, struct blob_attr *config)
425 struct blob_attr *tb[IFACE_ATTR_MAX];
426 struct blob_attr *cur;
428 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
429 blob_data(config), blob_len(config));
431 if ((cur = tb[IFACE_ATTR_IFNAME]))
432 iface->ifname = blobmsg_data(cur);
434 iface->config = config;
435 vlist_add(&interfaces, &iface->node, iface->name);
439 interface_set_l3_dev(struct interface *iface, struct device *dev)
441 bool enabled = iface->config_ip.enabled;
442 bool claimed = iface->l3_dev.claimed;
444 if (iface->l3_dev.dev == dev)
447 interface_ip_set_enabled(&iface->config_ip, false);
448 interface_ip_flush(&iface->proto_ip);
449 device_add_user(&iface->l3_dev, dev);
453 device_claim(&iface->l3_dev);
454 interface_ip_set_enabled(&iface->config_ip, enabled);
459 interface_set_main_dev(struct interface *iface, struct device *dev)
461 bool set_l3 = (iface->main_dev.dev == iface->l3_dev.dev);
462 bool claimed = iface->l3_dev.claimed;
464 if (iface->main_dev.dev == dev)
468 interface_set_l3_dev(iface, dev);
470 device_add_user(&iface->main_dev, dev);
472 device_claim(&iface->l3_dev);
474 if (!iface->l3_dev.dev)
475 interface_set_l3_dev(iface, dev);
479 interface_remove_link(struct interface *iface, struct device *dev)
481 struct device *mdev = iface->main_dev.dev;
483 if (mdev && mdev->hotplug_ops)
484 return mdev->hotplug_ops->del(mdev, dev);
486 if (!iface->main_dev.hotplug)
487 return UBUS_STATUS_INVALID_ARGUMENT;
489 if (dev != iface->main_dev.dev)
490 return UBUS_STATUS_INVALID_ARGUMENT;
492 device_remove_user(&iface->main_dev);
497 interface_add_link(struct interface *iface, struct device *dev)
499 struct device *mdev = iface->main_dev.dev;
504 if (iface->main_dev.hotplug)
505 device_remove_user(&iface->main_dev);
508 if (mdev->hotplug_ops)
509 return mdev->hotplug_ops->add(mdev, dev);
511 return UBUS_STATUS_NOT_SUPPORTED;
514 interface_set_main_dev(iface, dev);
515 iface->main_dev.hotplug = true;
520 interface_set_up(struct interface *iface)
524 iface->autostart = true;
526 if (iface->state != IFS_DOWN)
529 interface_clear_errors(iface);
530 if (!iface->available) {
531 interface_add_error(iface, "interface", "NO_DEVICE", NULL, 0);
535 if (iface->main_dev.dev) {
536 ret = device_claim(&iface->main_dev);
541 iface->state = IFS_SETUP;
542 ret = interface_proto_event(iface->proto, PROTO_CMD_SETUP, false);
544 mark_interface_down(iface);
552 interface_set_down(struct interface *iface)
555 vlist_for_each_element(&interfaces, iface, node)
556 __interface_set_down(iface, false);
558 iface->autostart = false;
559 __interface_set_down(iface, false);
566 interface_start_pending(void)
568 struct interface *iface;
570 vlist_for_each_element(&interfaces, iface, node) {
571 if (iface->available && iface->autostart)
572 interface_set_up(iface);
577 set_config_state(struct interface *iface, enum interface_config_state s)
579 iface->config_state = s;
580 if (iface->state == IFS_DOWN)
581 interface_handle_config_change(iface);
583 __interface_set_down(iface, false);
587 interface_update_start(struct interface *iface)
589 interface_ip_update_start(&iface->proto_ip);
593 interface_update_complete(struct interface *iface)
595 interface_ip_update_complete(&iface->proto_ip);
599 interface_replace_dns(struct interface_ip_settings *new, struct interface_ip_settings *old)
601 vlist_simple_replace(&new->dns_servers, &old->dns_servers);
602 vlist_simple_replace(&new->dns_search, &old->dns_search);
606 interface_change_config(struct interface *if_old, struct interface *if_new)
608 struct blob_attr *old_config = if_old->config;
609 const char *old_ifname = if_old->ifname;
610 const struct proto_handler *proto = if_old->proto_handler;
612 interface_clear_errors(if_old);
613 if_old->config = if_new->config;
614 if (!if_old->config_autostart && if_new->config_autostart)
615 if_old->autostart = true;
617 if_old->config_autostart = if_new->config_autostart;
618 if_old->ifname = if_new->ifname;
619 if_old->proto_handler = if_new->proto_handler;
621 if ((!!old_ifname != !!if_new->ifname) ||
622 (old_ifname && strcmp(old_ifname, if_new->ifname) != 0) ||
623 proto != if_new->proto_handler) {
624 D(INTERFACE, "Reload interface '%s' because of ifname/proto change\n",
629 if (!proto->config_params)
630 D(INTERFACE, "No config parameters for interface '%s'\n",
632 else if (!config_check_equal(old_config, if_new->config,
633 proto->config_params)) {
634 D(INTERFACE, "Reload interface '%s because of config changes\n",
639 #define UPDATE(field) ({ \
640 bool __changed = (if_old->field != if_new->field); \
641 if_old->field = if_new->field; \
645 if (UPDATE(metric) || UPDATE(proto_ip.no_defaultroute)) {
646 interface_ip_set_enabled(&if_old->config_ip, false);
647 interface_ip_set_enabled(&if_old->config_ip, if_new->config_ip.enabled);
648 interface_ip_set_enabled(&if_old->proto_ip, false);
649 interface_ip_set_enabled(&if_old->proto_ip, if_new->proto_ip.enabled);
652 UPDATE(proto_ip.no_dns);
653 interface_replace_dns(&if_old->config_ip, &if_new->config_ip);
654 interface_write_resolv_conf();
661 set_config_state(if_old, IFC_RELOAD);
668 interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
669 struct vlist_node *node_old)
671 struct interface *if_old = container_of(node_old, struct interface, node);
672 struct interface *if_new = container_of(node_new, struct interface, node);
674 if (node_old && node_new) {
675 D(INTERFACE, "Update interface '%s'\n", if_new->name);
676 interface_change_config(if_old, if_new);
677 } else if (node_old) {
678 D(INTERFACE, "Remove interface '%s'\n", if_old->name);
679 set_config_state(if_old, IFC_REMOVE);
680 } else if (node_new) {
681 D(INTERFACE, "Create interface '%s'\n", if_new->name);
682 proto_init_interface(if_new, if_new->config);
683 interface_claim_device(if_new);
684 netifd_ubus_add_interface(if_new);
690 interface_init_list(void)
692 vlist_init(&interfaces, avl_strcmp, interface_update);
693 interfaces.keep_old = true;
694 interfaces.no_delete = true;