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
,
39 static const struct blobmsg_policy iface_attrs
[IFACE_ATTR_MAX
] = {
40 [IFACE_ATTR_PROTO
] = { .name
= "proto", .type
= BLOBMSG_TYPE_STRING
},
41 [IFACE_ATTR_IFNAME
] = { .name
= "ifname", .type
= BLOBMSG_TYPE_STRING
},
42 [IFACE_ATTR_AUTO
] = { .name
= "auto", .type
= BLOBMSG_TYPE_BOOL
},
43 [IFACE_ATTR_DEFAULTROUTE
] = { .name
= "defaultroute", .type
= BLOBMSG_TYPE_BOOL
},
44 [IFACE_ATTR_METRIC
] = { .name
= "metric", .type
= BLOBMSG_TYPE_INT32
},
47 const struct config_param_list interface_attr_list
= {
48 .n_params
= IFACE_ATTR_MAX
,
49 .params
= iface_attrs
,
53 interface_clear_errors(struct interface
*iface
)
55 struct interface_error
*error
, *tmp
;
57 list_for_each_entry_safe(error
, tmp
, &iface
->errors
, list
) {
58 list_del(&error
->list
);
63 void interface_add_error(struct interface
*iface
, const char *subsystem
,
64 const char *code
, const char **data
, int n_data
)
66 struct interface_error
*error
;
72 len
= n_data
* sizeof(char *);
73 datalen
= alloca(len
);
74 for (i
= 0; i
< n_data
; i
++) {
75 datalen
[i
] = strlen(data
[i
]) + 1;
80 error
= calloc(1, sizeof(*error
) + sizeof(char *) + len
);
84 list_add_tail(&error
->list
, &iface
->errors
);
85 error
->subsystem
= subsystem
;
88 dest
= (char *) &error
->data
[n_data
+ 1];
89 for (i
= 0; i
< n_data
; i
++) {
90 error
->data
[i
] = dest
;
91 memcpy(dest
, data
[i
], datalen
[i
]);
94 error
->data
[n_data
] = NULL
;
98 interface_data_del(struct interface
*iface
, struct interface_data
*data
)
100 avl_delete(&iface
->data
, &data
->node
);
105 interface_data_flush(struct interface
*iface
)
107 struct interface_data
*d
, *tmp
;
109 avl_for_each_element_safe(&iface
->data
, d
, node
, tmp
)
110 interface_data_del(iface
, d
);
114 interface_add_data(struct interface
*iface
, const struct blob_attr
*data
)
116 struct interface_data
*n
, *o
;
118 if (!blobmsg_check_attr(data
, true))
119 return UBUS_STATUS_INVALID_ARGUMENT
;
121 n
= calloc(1, sizeof(*data
) + blob_pad_len(data
));
122 memcpy(n
->data
, data
, blob_pad_len(data
));
123 n
->node
.key
= blobmsg_name(data
);
125 o
= avl_find_element(&iface
->data
, n
->node
.key
, o
, node
);
127 interface_data_del(iface
, o
);
129 avl_insert(&iface
->data
, &n
->node
);
134 interface_event(struct interface
*iface
, enum interface_event ev
)
136 struct interface_user
*dep
, *tmp
;
138 list_for_each_entry_safe(dep
, tmp
, &iface
->users
, list
)
139 dep
->cb(dep
, iface
, ev
);
141 list_for_each_entry_safe(dep
, tmp
, &iface_all_users
, list
)
142 dep
->cb(dep
, iface
, ev
);
146 interface_flush_state(struct interface
*iface
)
148 if (iface
->main_dev
.dev
)
149 device_release(&iface
->main_dev
);
150 if (iface
->l3_dev
.dev
)
151 device_release(&iface
->l3_dev
);
152 interface_data_flush(iface
);
156 mark_interface_down(struct interface
*iface
)
158 if (iface
->state
== IFS_UP
)
159 interface_event(iface
, IFEV_DOWN
);
160 interface_ip_set_enabled(&iface
->config_ip
, false);
161 interface_ip_flush(&iface
->proto_ip
);
162 interface_flush_state(iface
);
163 system_flush_routes();
164 iface
->state
= IFS_DOWN
;
168 __interface_set_down(struct interface
*iface
, bool force
)
170 interface_clear_errors(iface
);
172 if (iface
->state
== IFS_DOWN
||
173 iface
->state
== IFS_TEARDOWN
)
176 if (iface
->state
== IFS_UP
)
177 interface_event(iface
, IFEV_DOWN
);
178 iface
->state
= IFS_TEARDOWN
;
179 interface_proto_event(iface
->proto
, PROTO_CMD_TEARDOWN
, force
);
181 interface_flush_state(iface
);
185 interface_cb(struct device_user
*dep
, enum device_event ev
)
187 struct interface
*iface
;
190 iface
= container_of(dep
, struct interface
, main_dev
);
195 case DEV_EVENT_REMOVE
:
202 interface_set_available(iface
, new_state
);
206 interface_set_available(struct interface
*iface
, bool new_state
)
208 if (iface
->available
== new_state
)
211 D(INTERFACE
, "Interface '%s', available=%d\n", iface
->name
, new_state
);
212 iface
->available
= new_state
;
215 if (iface
->autostart
&& !config_init
)
216 interface_set_up(iface
);
218 __interface_set_down(iface
, true);
222 interface_add_user(struct interface_user
*dep
, struct interface
*iface
)
225 list_add(&dep
->list
, &iface_all_users
);
230 list_add(&dep
->list
, &iface
->users
);
231 if (iface
->state
== IFS_UP
)
232 dep
->cb(dep
, iface
, IFEV_UP
);
236 interface_remove_user(struct interface_user
*dep
)
238 list_del_init(&dep
->list
);
243 interface_claim_device(struct interface
*iface
)
248 !(iface
->proto_handler
->flags
& PROTO_FLAG_NODEV
)) {
249 dev
= device_get(iface
->ifname
, true);
251 interface_set_main_dev(iface
, dev
);
253 if (iface
->proto_handler
->flags
& PROTO_FLAG_INIT_AVAILABLE
)
254 interface_set_available(iface
, true);
259 interface_cleanup(struct interface
*iface
, bool reload
)
261 struct interface_user
*dep
, *tmp
;
263 list_for_each_entry_safe(dep
, tmp
, &iface
->users
, list
)
264 interface_remove_user(dep
);
266 interface_ip_flush(&iface
->config_ip
);
267 interface_flush_state(iface
);
268 interface_clear_errors(iface
);
269 if (iface
->main_dev
.dev
&&
270 (!reload
|| !iface
->main_dev
.hotplug
))
271 interface_set_main_dev(iface
, NULL
);
272 interface_set_proto_state(iface
, NULL
);
276 interface_do_free(struct interface
*iface
)
278 interface_event(iface
, IFEV_FREE
);
279 interface_cleanup(iface
, false);
281 netifd_ubus_remove_interface(iface
);
282 avl_delete(&interfaces
.avl
, &iface
->node
.avl
);
287 interface_do_reload(struct interface
*iface
)
289 interface_event(iface
, IFEV_RELOAD
);
290 interface_cleanup(iface
, true);
291 proto_init_interface(iface
, iface
->config
);
292 interface_claim_device(iface
);
296 interface_handle_config_change(struct interface
*iface
)
298 switch(iface
->config_state
) {
302 interface_do_reload(iface
);
305 interface_do_free(iface
);
308 if (iface
->autostart
&& iface
->available
)
309 interface_set_up(iface
);
313 interface_proto_cb(struct interface_proto_state
*state
, enum interface_proto_event ev
)
315 struct interface
*iface
= state
->iface
;
319 if (iface
->state
!= IFS_SETUP
)
322 interface_ip_set_enabled(&iface
->config_ip
, true);
323 system_flush_routes();
324 iface
->state
= IFS_UP
;
325 iface
->start_time
= system_get_rtime();
326 interface_event(iface
, IFEV_UP
);
327 interface_write_resolv_conf();
328 netifd_log_message(L_NOTICE
, "Interface '%s' is now up\n", iface
->name
);
331 if (iface
->state
== IFS_DOWN
)
334 netifd_log_message(L_NOTICE
, "Interface '%s' is now down\n", iface
->name
);
335 mark_interface_down(iface
);
336 interface_handle_config_change(iface
);
338 case IFPEV_LINK_LOST
:
339 if (iface
->state
!= IFS_UP
)
342 netifd_log_message(L_NOTICE
, "Interface '%s' has lost the connection\n", iface
->name
);
343 mark_interface_down(iface
);
344 iface
->state
= IFS_SETUP
;
349 void interface_set_proto_state(struct interface
*iface
, struct interface_proto_state
*state
)
352 iface
->proto
->free(iface
->proto
);
355 iface
->state
= IFS_DOWN
;
356 iface
->proto
= state
;
360 state
->proto_event
= interface_proto_cb
;
361 state
->iface
= iface
;
365 interface_init(struct interface
*iface
, const char *name
,
366 struct blob_attr
*config
)
368 struct blob_attr
*tb
[IFACE_ATTR_MAX
];
369 struct blob_attr
*cur
;
370 const char *proto_name
= NULL
;
372 strncpy(iface
->name
, name
, sizeof(iface
->name
) - 1);
373 INIT_LIST_HEAD(&iface
->errors
);
374 INIT_LIST_HEAD(&iface
->users
);
375 INIT_LIST_HEAD(&iface
->hotplug_list
);
376 interface_ip_init(iface
);
377 avl_init(&iface
->data
, avl_strcmp
, false, NULL
);
378 iface
->config_ip
.enabled
= false;
380 iface
->main_dev
.cb
= interface_cb
;
382 blobmsg_parse(iface_attrs
, IFACE_ATTR_MAX
, tb
,
383 blob_data(config
), blob_len(config
));
385 if ((cur
= tb
[IFACE_ATTR_PROTO
]))
386 proto_name
= blobmsg_data(cur
);
388 proto_attach_interface(iface
, proto_name
);
390 iface
->autostart
= blobmsg_get_bool_default(tb
[IFACE_ATTR_AUTO
], true);
391 iface
->proto_ip
.no_defaultroute
=
392 !blobmsg_get_bool_default(tb
[IFACE_ATTR_DEFAULTROUTE
], true);
394 iface
->config_autostart
= iface
->autostart
;
398 interface_add(struct interface
*iface
, struct blob_attr
*config
)
400 struct blob_attr
*tb
[IFACE_ATTR_MAX
];
401 struct blob_attr
*cur
;
403 blobmsg_parse(iface_attrs
, IFACE_ATTR_MAX
, tb
,
404 blob_data(config
), blob_len(config
));
406 if ((cur
= tb
[IFACE_ATTR_IFNAME
]))
407 iface
->ifname
= blobmsg_data(cur
);
409 iface
->config
= config
;
410 vlist_add(&interfaces
, &iface
->node
, iface
->name
);
414 interface_set_l3_dev(struct interface
*iface
, struct device
*dev
)
416 bool enabled
= iface
->config_ip
.enabled
;
417 bool claimed
= iface
->l3_dev
.claimed
;
419 if (iface
->l3_dev
.dev
== dev
)
422 interface_ip_set_enabled(&iface
->config_ip
, false);
423 interface_ip_flush(&iface
->proto_ip
);
424 device_add_user(&iface
->l3_dev
, dev
);
428 device_claim(&iface
->l3_dev
);
429 interface_ip_set_enabled(&iface
->config_ip
, enabled
);
434 interface_set_main_dev(struct interface
*iface
, struct device
*dev
)
436 bool set_l3
= (iface
->main_dev
.dev
== iface
->l3_dev
.dev
);
437 bool claimed
= iface
->l3_dev
.claimed
;
439 if (iface
->main_dev
.dev
== dev
)
443 interface_set_l3_dev(iface
, dev
);
445 device_add_user(&iface
->main_dev
, dev
);
447 device_claim(&iface
->l3_dev
);
449 if (!iface
->l3_dev
.dev
)
450 interface_set_l3_dev(iface
, dev
);
454 interface_remove_link(struct interface
*iface
, struct device
*dev
)
456 struct device
*mdev
= iface
->main_dev
.dev
;
458 if (mdev
&& mdev
->hotplug_ops
)
459 return mdev
->hotplug_ops
->del(mdev
, dev
);
461 if (!iface
->main_dev
.hotplug
)
462 return UBUS_STATUS_INVALID_ARGUMENT
;
464 if (dev
!= iface
->main_dev
.dev
)
465 return UBUS_STATUS_INVALID_ARGUMENT
;
467 device_remove_user(&iface
->main_dev
);
472 interface_add_link(struct interface
*iface
, struct device
*dev
)
474 struct device
*mdev
= iface
->main_dev
.dev
;
479 if (iface
->main_dev
.hotplug
)
480 device_remove_user(&iface
->main_dev
);
483 if (mdev
->hotplug_ops
)
484 return mdev
->hotplug_ops
->add(mdev
, dev
);
486 return UBUS_STATUS_NOT_SUPPORTED
;
489 interface_set_main_dev(iface
, dev
);
490 iface
->main_dev
.hotplug
= true;
495 interface_set_up(struct interface
*iface
)
499 iface
->autostart
= true;
501 if (iface
->state
!= IFS_DOWN
)
504 interface_clear_errors(iface
);
505 if (!iface
->available
) {
506 interface_add_error(iface
, "interface", "NO_DEVICE", NULL
, 0);
510 if (iface
->main_dev
.dev
) {
511 ret
= device_claim(&iface
->main_dev
);
516 iface
->state
= IFS_SETUP
;
517 ret
= interface_proto_event(iface
->proto
, PROTO_CMD_SETUP
, false);
519 mark_interface_down(iface
);
527 interface_set_down(struct interface
*iface
)
530 vlist_for_each_element(&interfaces
, iface
, node
)
531 __interface_set_down(iface
, false);
533 iface
->autostart
= false;
534 __interface_set_down(iface
, false);
541 interface_start_pending(void)
543 struct interface
*iface
;
545 vlist_for_each_element(&interfaces
, iface
, node
) {
546 if (iface
->available
&& iface
->autostart
)
547 interface_set_up(iface
);
552 set_config_state(struct interface
*iface
, enum interface_config_state s
)
554 iface
->config_state
= s
;
555 if (iface
->state
== IFS_DOWN
)
556 interface_handle_config_change(iface
);
558 __interface_set_down(iface
, false);
562 interface_update_start(struct interface
*iface
)
564 interface_ip_update_start(&iface
->proto_ip
);
568 interface_update_complete(struct interface
*iface
)
570 interface_ip_update_complete(&iface
->proto_ip
);
574 interface_change_config(struct interface
*if_old
, struct interface
*if_new
)
576 struct blob_attr
*old_config
= if_old
->config
;
577 const char *old_ifname
= if_old
->ifname
;
578 const struct proto_handler
*proto
= if_old
->proto_handler
;
580 interface_clear_errors(if_old
);
581 if_old
->config
= if_new
->config
;
582 if (!if_old
->config_autostart
&& if_new
->config_autostart
)
583 if_old
->autostart
= true;
585 if_old
->config_autostart
= if_new
->config_autostart
;
586 if_old
->ifname
= if_new
->ifname
;
587 if_old
->proto_handler
= if_new
->proto_handler
;
589 if ((!!old_ifname
!= !!if_new
->ifname
) ||
590 (old_ifname
&& strcmp(old_ifname
, if_new
->ifname
) != 0) ||
591 proto
!= if_new
->proto_handler
) {
592 D(INTERFACE
, "Reload interface '%s' because of ifname/proto change\n",
597 if (!proto
->config_params
)
598 D(INTERFACE
, "No config parameters for interface '%s'\n",
600 else if (!config_check_equal(old_config
, if_new
->config
,
601 proto
->config_params
)) {
602 D(INTERFACE
, "Reload interface '%s because of config changes\n",
607 #define UPDATE(field) ({ \
608 bool __changed = (if_old->field != if_new->field); \
609 if_old->field = if_new->field; \
613 if (UPDATE(metric
) || UPDATE(proto_ip
.no_defaultroute
)) {
614 interface_ip_set_enabled(&if_old
->config_ip
, false);
615 interface_ip_set_enabled(&if_old
->config_ip
, if_new
->config_ip
.enabled
);
616 interface_ip_set_enabled(&if_old
->proto_ip
, false);
617 interface_ip_set_enabled(&if_old
->proto_ip
, if_new
->proto_ip
.enabled
);
625 set_config_state(if_old
, IFC_RELOAD
);
632 interface_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
633 struct vlist_node
*node_old
)
635 struct interface
*if_old
= container_of(node_old
, struct interface
, node
);
636 struct interface
*if_new
= container_of(node_new
, struct interface
, node
);
638 if (node_old
&& node_new
) {
639 D(INTERFACE
, "Update interface '%s'\n", if_new
->name
);
640 interface_change_config(if_old
, if_new
);
641 } else if (node_old
) {
642 D(INTERFACE
, "Remove interface '%s'\n", if_old
->name
);
643 set_config_state(if_old
, IFC_REMOVE
);
644 } else if (node_new
) {
645 D(INTERFACE
, "Create interface '%s'\n", if_new
->name
);
646 proto_init_interface(if_new
, if_new
->config
);
647 interface_claim_device(if_new
);
648 netifd_ubus_add_interface(if_new
);
654 interface_init_list(void)
656 vlist_init(&interfaces
, avl_strcmp
, interface_update
);
657 interfaces
.keep_old
= true;
658 interfaces
.no_delete
= true;