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,
40 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
41 [IFACE_ATTR_PROTO] = { .name = "proto", .type = BLOBMSG_TYPE_STRING },
42 [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
43 [IFACE_ATTR_AUTO] = { .name = "auto", .type = BLOBMSG_TYPE_BOOL },
44 [IFACE_ATTR_DEFAULTROUTE] = { .name = "defaultroute", .type = BLOBMSG_TYPE_BOOL },
45 [IFACE_ATTR_PEERDNS] = { .name = "peerdns", .type = BLOBMSG_TYPE_BOOL },
46 [IFACE_ATTR_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
49 const struct config_param_list interface_attr_list = {
50 .n_params = IFACE_ATTR_MAX,
51 .params = iface_attrs,
55 interface_clear_errors(struct interface *iface)
57 struct interface_error *error, *tmp;
59 list_for_each_entry_safe(error, tmp, &iface->errors, list) {
60 list_del(&error->list);
65 void interface_add_error(struct interface *iface, const char *subsystem,
66 const char *code, const char **data, int n_data)
68 struct interface_error *error;
74 len = n_data * sizeof(char *);
75 datalen = alloca(len);
76 for (i = 0; i < n_data; i++) {
77 datalen[i] = strlen(data[i]) + 1;
82 error = calloc(1, sizeof(*error) + sizeof(char *) + len);
86 list_add_tail(&error->list, &iface->errors);
87 error->subsystem = subsystem;
90 dest = (char *) &error->data[n_data + 1];
91 for (i = 0; i < n_data; i++) {
92 error->data[i] = dest;
93 memcpy(dest, data[i], datalen[i]);
96 error->data[n_data] = NULL;
100 interface_data_del(struct interface *iface, struct interface_data *data)
102 avl_delete(&iface->data, &data->node);
107 interface_data_flush(struct interface *iface)
109 struct interface_data *d, *tmp;
111 avl_for_each_element_safe(&iface->data, d, node, tmp)
112 interface_data_del(iface, d);
116 interface_add_data(struct interface *iface, const struct blob_attr *data)
118 struct interface_data *n, *o;
120 if (!blobmsg_check_attr(data, true))
121 return UBUS_STATUS_INVALID_ARGUMENT;
123 n = calloc(1, sizeof(*n) + blob_pad_len(data));
124 memcpy(n->data, data, blob_pad_len(data));
125 n->node.key = blobmsg_name(data);
127 o = avl_find_element(&iface->data, n->node.key, o, node);
129 interface_data_del(iface, o);
131 avl_insert(&iface->data, &n->node);
136 interface_event(struct interface *iface, enum interface_event ev)
138 struct interface_user *dep, *tmp;
140 list_for_each_entry_safe(dep, tmp, &iface->users, list)
141 dep->cb(dep, iface, ev);
143 list_for_each_entry_safe(dep, tmp, &iface_all_users, list)
144 dep->cb(dep, iface, ev);
148 interface_flush_state(struct interface *iface)
150 if (iface->main_dev.dev)
151 device_release(&iface->main_dev);
152 if (iface->l3_dev.dev)
153 device_release(&iface->l3_dev);
154 interface_data_flush(iface);
158 mark_interface_down(struct interface *iface)
160 if (iface->state == IFS_UP)
161 interface_event(iface, IFEV_DOWN);
162 interface_ip_set_enabled(&iface->config_ip, false);
163 interface_ip_flush(&iface->proto_ip);
164 interface_flush_state(iface);
165 system_flush_routes();
166 iface->state = IFS_DOWN;
170 __interface_set_down(struct interface *iface, bool force)
172 interface_clear_errors(iface);
174 if (iface->state == IFS_DOWN ||
175 iface->state == IFS_TEARDOWN)
178 if (iface->state == IFS_UP)
179 interface_event(iface, IFEV_DOWN);
180 iface->state = IFS_TEARDOWN;
181 interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, force);
183 interface_flush_state(iface);
187 interface_cb(struct device_user *dep, enum device_event ev)
189 struct interface *iface;
192 iface = container_of(dep, struct interface, main_dev);
197 case DEV_EVENT_REMOVE:
204 interface_set_available(iface, new_state);
208 interface_set_available(struct interface *iface, bool new_state)
210 if (iface->available == new_state)
213 D(INTERFACE, "Interface '%s', available=%d\n", iface->name, new_state);
214 iface->available = new_state;
217 if (iface->autostart && !config_init)
218 interface_set_up(iface);
220 __interface_set_down(iface, true);
224 interface_add_user(struct interface_user *dep, struct interface *iface)
227 list_add(&dep->list, &iface_all_users);
232 list_add(&dep->list, &iface->users);
233 if (iface->state == IFS_UP)
234 dep->cb(dep, iface, IFEV_UP);
238 interface_remove_user(struct interface_user *dep)
240 list_del_init(&dep->list);
245 interface_claim_device(struct interface *iface)
250 !(iface->proto_handler->flags & PROTO_FLAG_NODEV)) {
251 dev = device_get(iface->ifname, true);
253 interface_set_main_dev(iface, dev);
255 if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
256 interface_set_available(iface, true);
261 interface_cleanup(struct interface *iface, bool reload)
263 struct interface_user *dep, *tmp;
265 list_for_each_entry_safe(dep, tmp, &iface->users, list)
266 interface_remove_user(dep);
268 interface_ip_flush(&iface->config_ip);
269 interface_flush_state(iface);
270 interface_clear_errors(iface);
271 if (iface->main_dev.dev &&
272 (!reload || !iface->main_dev.hotplug))
273 interface_set_main_dev(iface, NULL);
274 interface_set_proto_state(iface, NULL);
278 interface_do_free(struct interface *iface)
280 interface_event(iface, IFEV_FREE);
281 interface_cleanup(iface, false);
283 netifd_ubus_remove_interface(iface);
284 avl_delete(&interfaces.avl, &iface->node.avl);
289 interface_do_reload(struct interface *iface)
291 interface_event(iface, IFEV_RELOAD);
292 interface_cleanup(iface, true);
293 proto_init_interface(iface, iface->config);
294 interface_claim_device(iface);
298 interface_handle_config_change(struct interface *iface)
300 switch(iface->config_state) {
304 interface_do_reload(iface);
307 interface_do_free(iface);
310 if (iface->autostart && iface->available)
311 interface_set_up(iface);
315 interface_proto_cb(struct interface_proto_state *state, enum interface_proto_event ev)
317 struct interface *iface = state->iface;
321 if (iface->state != IFS_SETUP)
324 interface_ip_set_enabled(&iface->config_ip, true);
325 system_flush_routes();
326 iface->state = IFS_UP;
327 iface->start_time = system_get_rtime();
328 interface_event(iface, IFEV_UP);
329 interface_write_resolv_conf();
330 netifd_log_message(L_NOTICE, "Interface '%s' is now up\n", iface->name);
333 if (iface->state == IFS_DOWN)
336 netifd_log_message(L_NOTICE, "Interface '%s' is now down\n", iface->name);
337 mark_interface_down(iface);
338 interface_handle_config_change(iface);
340 case IFPEV_LINK_LOST:
341 if (iface->state != IFS_UP)
344 netifd_log_message(L_NOTICE, "Interface '%s' has lost the connection\n", iface->name);
345 mark_interface_down(iface);
346 iface->state = IFS_SETUP;
351 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state)
354 iface->proto->free(iface->proto);
357 iface->state = IFS_DOWN;
358 iface->proto = state;
362 state->proto_event = interface_proto_cb;
363 state->iface = iface;
367 interface_init(struct interface *iface, const char *name,
368 struct blob_attr *config)
370 struct blob_attr *tb[IFACE_ATTR_MAX];
371 struct blob_attr *cur;
372 const char *proto_name = NULL;
374 strncpy(iface->name, name, sizeof(iface->name) - 1);
375 INIT_LIST_HEAD(&iface->errors);
376 INIT_LIST_HEAD(&iface->users);
377 INIT_LIST_HEAD(&iface->hotplug_list);
378 interface_ip_init(iface);
379 avl_init(&iface->data, avl_strcmp, false, NULL);
380 iface->config_ip.enabled = false;
382 iface->main_dev.cb = interface_cb;
384 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
385 blob_data(config), blob_len(config));
387 if ((cur = tb[IFACE_ATTR_PROTO]))
388 proto_name = blobmsg_data(cur);
390 proto_attach_interface(iface, proto_name);
392 iface->autostart = blobmsg_get_bool_default(tb[IFACE_ATTR_AUTO], true);
393 iface->proto_ip.no_defaultroute =
394 !blobmsg_get_bool_default(tb[IFACE_ATTR_DEFAULTROUTE], true);
395 iface->proto_ip.no_dns =
396 !blobmsg_get_bool_default(tb[IFACE_ATTR_PEERDNS], true);
398 iface->config_autostart = iface->autostart;
402 interface_add(struct interface *iface, struct blob_attr *config)
404 struct blob_attr *tb[IFACE_ATTR_MAX];
405 struct blob_attr *cur;
407 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
408 blob_data(config), blob_len(config));
410 if ((cur = tb[IFACE_ATTR_IFNAME]))
411 iface->ifname = blobmsg_data(cur);
413 iface->config = config;
414 vlist_add(&interfaces, &iface->node, iface->name);
418 interface_set_l3_dev(struct interface *iface, struct device *dev)
420 bool enabled = iface->config_ip.enabled;
421 bool claimed = iface->l3_dev.claimed;
423 if (iface->l3_dev.dev == dev)
426 interface_ip_set_enabled(&iface->config_ip, false);
427 interface_ip_flush(&iface->proto_ip);
428 device_add_user(&iface->l3_dev, dev);
432 device_claim(&iface->l3_dev);
433 interface_ip_set_enabled(&iface->config_ip, enabled);
438 interface_set_main_dev(struct interface *iface, struct device *dev)
440 bool set_l3 = (iface->main_dev.dev == iface->l3_dev.dev);
441 bool claimed = iface->l3_dev.claimed;
443 if (iface->main_dev.dev == dev)
447 interface_set_l3_dev(iface, dev);
449 device_add_user(&iface->main_dev, dev);
451 device_claim(&iface->l3_dev);
453 if (!iface->l3_dev.dev)
454 interface_set_l3_dev(iface, dev);
458 interface_remove_link(struct interface *iface, struct device *dev)
460 struct device *mdev = iface->main_dev.dev;
462 if (mdev && mdev->hotplug_ops)
463 return mdev->hotplug_ops->del(mdev, dev);
465 if (!iface->main_dev.hotplug)
466 return UBUS_STATUS_INVALID_ARGUMENT;
468 if (dev != iface->main_dev.dev)
469 return UBUS_STATUS_INVALID_ARGUMENT;
471 device_remove_user(&iface->main_dev);
476 interface_add_link(struct interface *iface, struct device *dev)
478 struct device *mdev = iface->main_dev.dev;
483 if (iface->main_dev.hotplug)
484 device_remove_user(&iface->main_dev);
487 if (mdev->hotplug_ops)
488 return mdev->hotplug_ops->add(mdev, dev);
490 return UBUS_STATUS_NOT_SUPPORTED;
493 interface_set_main_dev(iface, dev);
494 iface->main_dev.hotplug = true;
499 interface_set_up(struct interface *iface)
503 iface->autostart = true;
505 if (iface->state != IFS_DOWN)
508 interface_clear_errors(iface);
509 if (!iface->available) {
510 interface_add_error(iface, "interface", "NO_DEVICE", NULL, 0);
514 if (iface->main_dev.dev) {
515 ret = device_claim(&iface->main_dev);
520 iface->state = IFS_SETUP;
521 ret = interface_proto_event(iface->proto, PROTO_CMD_SETUP, false);
523 mark_interface_down(iface);
531 interface_set_down(struct interface *iface)
534 vlist_for_each_element(&interfaces, iface, node)
535 __interface_set_down(iface, false);
537 iface->autostart = false;
538 __interface_set_down(iface, false);
545 interface_start_pending(void)
547 struct interface *iface;
549 vlist_for_each_element(&interfaces, iface, node) {
550 if (iface->available && iface->autostart)
551 interface_set_up(iface);
556 set_config_state(struct interface *iface, enum interface_config_state s)
558 iface->config_state = s;
559 if (iface->state == IFS_DOWN)
560 interface_handle_config_change(iface);
562 __interface_set_down(iface, false);
566 interface_update_start(struct interface *iface)
568 interface_ip_update_start(&iface->proto_ip);
572 interface_update_complete(struct interface *iface)
574 interface_ip_update_complete(&iface->proto_ip);
578 interface_change_config(struct interface *if_old, struct interface *if_new)
580 struct blob_attr *old_config = if_old->config;
581 const char *old_ifname = if_old->ifname;
582 const struct proto_handler *proto = if_old->proto_handler;
584 interface_clear_errors(if_old);
585 if_old->config = if_new->config;
586 if (!if_old->config_autostart && if_new->config_autostart)
587 if_old->autostart = true;
589 if_old->config_autostart = if_new->config_autostart;
590 if_old->ifname = if_new->ifname;
591 if_old->proto_handler = if_new->proto_handler;
593 if ((!!old_ifname != !!if_new->ifname) ||
594 (old_ifname && strcmp(old_ifname, if_new->ifname) != 0) ||
595 proto != if_new->proto_handler) {
596 D(INTERFACE, "Reload interface '%s' because of ifname/proto change\n",
601 if (!proto->config_params)
602 D(INTERFACE, "No config parameters for interface '%s'\n",
604 else if (!config_check_equal(old_config, if_new->config,
605 proto->config_params)) {
606 D(INTERFACE, "Reload interface '%s because of config changes\n",
611 #define UPDATE(field) ({ \
612 bool __changed = (if_old->field != if_new->field); \
613 if_old->field = if_new->field; \
617 if (UPDATE(metric) || UPDATE(proto_ip.no_defaultroute)) {
618 interface_ip_set_enabled(&if_old->config_ip, false);
619 interface_ip_set_enabled(&if_old->config_ip, if_new->config_ip.enabled);
620 interface_ip_set_enabled(&if_old->proto_ip, false);
621 interface_ip_set_enabled(&if_old->proto_ip, if_new->proto_ip.enabled);
623 if (UPDATE(proto_ip.no_dns))
624 interface_write_resolv_conf();
631 set_config_state(if_old, IFC_RELOAD);
638 interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
639 struct vlist_node *node_old)
641 struct interface *if_old = container_of(node_old, struct interface, node);
642 struct interface *if_new = container_of(node_new, struct interface, node);
644 if (node_old && node_new) {
645 D(INTERFACE, "Update interface '%s'\n", if_new->name);
646 interface_change_config(if_old, if_new);
647 } else if (node_old) {
648 D(INTERFACE, "Remove interface '%s'\n", if_old->name);
649 set_config_state(if_old, IFC_REMOVE);
650 } else if (node_new) {
651 D(INTERFACE, "Create interface '%s'\n", if_new->name);
652 proto_init_interface(if_new, if_new->config);
653 interface_claim_device(if_new);
654 netifd_ubus_add_interface(if_new);
660 interface_init_list(void)
662 vlist_init(&interfaces, avl_strcmp, interface_update);
663 interfaces.keep_old = true;
664 interfaces.no_delete = true;