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
;
82 char *dest
, *d_subsys
, *d_code
;
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_a(sizeof(*error
) + sizeof(char *) + len
,
94 &d_subsys
, subsystem
? strlen(subsystem
) + 1 : 0,
95 &d_code
, code
? strlen(code
) + 1 : 0);
99 list_add_tail(&error
->list
, &iface
->errors
);
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
;
110 error
->subsystem
= strcpy(d_subsys
, subsystem
);
113 error
->code
= strcpy(d_code
, code
);
117 interface_data_del(struct interface
*iface
, struct interface_data
*data
)
119 avl_delete(&iface
->data
, &data
->node
);
124 interface_data_flush(struct interface
*iface
)
126 struct interface_data
*d
, *tmp
;
128 avl_for_each_element_safe(&iface
->data
, d
, node
, tmp
)
129 interface_data_del(iface
, d
);
133 interface_add_data(struct interface
*iface
, const struct blob_attr
*data
)
135 struct interface_data
*n
, *o
;
137 if (!blobmsg_check_attr(data
, true))
138 return UBUS_STATUS_INVALID_ARGUMENT
;
140 n
= calloc(1, sizeof(*n
) + blob_pad_len(data
));
141 memcpy(n
->data
, data
, blob_pad_len(data
));
142 n
->node
.key
= blobmsg_name(data
);
144 o
= avl_find_element(&iface
->data
, n
->node
.key
, o
, node
);
146 interface_data_del(iface
, o
);
148 avl_insert(&iface
->data
, &n
->node
);
153 interface_event(struct interface
*iface
, enum interface_event ev
)
155 struct interface_user
*dep
, *tmp
;
156 struct device
*adev
= NULL
;
158 list_for_each_entry_safe(dep
, tmp
, &iface
->users
, list
)
159 dep
->cb(dep
, iface
, ev
);
161 list_for_each_entry_safe(dep
, tmp
, &iface_all_users
, list
)
162 dep
->cb(dep
, iface
, ev
);
166 adev
= iface
->l3_dev
.dev
;
169 alias_notify_device(iface
->name
, adev
);
177 interface_flush_state(struct interface
*iface
)
179 if (iface
->l3_dev
.dev
)
180 device_release(&iface
->l3_dev
);
181 interface_data_flush(iface
);
185 mark_interface_down(struct interface
*iface
)
187 enum interface_state state
= iface
->state
;
189 iface
->state
= IFS_DOWN
;
191 interface_event(iface
, IFEV_DOWN
);
192 interface_ip_set_enabled(&iface
->config_ip
, false);
193 interface_ip_flush(&iface
->proto_ip
);
194 interface_flush_state(iface
);
195 system_flush_routes();
199 __interface_set_down(struct interface
*iface
, bool force
)
201 if (iface
->state
== IFS_DOWN
||
202 iface
->state
== IFS_TEARDOWN
)
205 if (iface
->state
== IFS_UP
)
206 interface_event(iface
, IFEV_DOWN
);
207 iface
->state
= IFS_TEARDOWN
;
208 interface_proto_event(iface
->proto
, PROTO_CMD_TEARDOWN
, force
);
210 interface_flush_state(iface
);
214 interface_cb(struct device_user
*dep
, enum device_event ev
)
216 struct interface
*iface
;
219 iface
= container_of(dep
, struct interface
, main_dev
);
224 case DEV_EVENT_REMOVE
:
231 interface_set_available(iface
, new_state
);
232 if (!new_state
&& dep
->dev
->external
)
233 interface_set_main_dev(iface
, NULL
);
237 interface_set_available(struct interface
*iface
, bool new_state
)
239 if (iface
->available
== new_state
)
242 D(INTERFACE
, "Interface '%s', available=%d\n", iface
->name
, new_state
);
243 iface
->available
= new_state
;
246 if (iface
->autostart
&& !config_init
)
247 interface_set_up(iface
);
249 __interface_set_down(iface
, true);
253 interface_add_user(struct interface_user
*dep
, struct interface
*iface
)
256 list_add(&dep
->list
, &iface_all_users
);
261 list_add(&dep
->list
, &iface
->users
);
262 if (iface
->state
== IFS_UP
)
263 dep
->cb(dep
, iface
, IFEV_UP
);
267 interface_remove_user(struct interface_user
*dep
)
269 list_del_init(&dep
->list
);
274 interface_alias_cb(struct interface_user
*dep
, struct interface
*iface
, enum interface_event ev
)
276 struct interface
*alias
= container_of(dep
, struct interface
, parent_iface
);
277 struct device
*dev
= iface
->l3_dev
.dev
;
284 interface_set_main_dev(alias
, dev
);
285 interface_set_available(alias
, true);
288 interface_set_available(alias
, false);
289 interface_set_main_dev(alias
, NULL
);
292 interface_remove_user(dep
);
300 interface_claim_device(struct interface
*iface
)
302 struct interface
*parent
;
303 struct device
*dev
= NULL
;
305 if (iface
->parent_iface
.iface
)
306 interface_remove_user(&iface
->parent_iface
);
308 if (iface
->parent_ifname
) {
309 parent
= vlist_find(&interfaces
, iface
->parent_ifname
, parent
, node
);
310 iface
->parent_iface
.cb
= interface_alias_cb
;
311 interface_add_user(&iface
->parent_iface
, parent
);
312 } else if (iface
->ifname
&&
313 !(iface
->proto_handler
->flags
& PROTO_FLAG_NODEV
)) {
314 dev
= device_get(iface
->ifname
, true);
318 interface_set_main_dev(iface
, dev
);
320 if (iface
->proto_handler
->flags
& PROTO_FLAG_INIT_AVAILABLE
)
321 interface_set_available(iface
, true);
325 interface_cleanup_state(struct interface
*iface
)
327 interface_flush_state(iface
);
328 interface_clear_errors(iface
);
329 interface_set_proto_state(iface
, NULL
);
333 interface_cleanup(struct interface
*iface
)
335 struct interface_user
*dep
, *tmp
;
337 if (iface
->parent_iface
.iface
)
338 interface_remove_user(&iface
->parent_iface
);
340 list_for_each_entry_safe(dep
, tmp
, &iface
->users
, list
)
341 interface_remove_user(dep
);
343 interface_ip_flush(&iface
->config_ip
);
344 if (iface
->main_dev
.dev
)
345 interface_set_main_dev(iface
, NULL
);
347 interface_cleanup_state(iface
);
351 interface_do_free(struct interface
*iface
)
353 interface_event(iface
, IFEV_FREE
);
354 interface_cleanup(iface
);
356 netifd_ubus_remove_interface(iface
);
357 avl_delete(&interfaces
.avl
, &iface
->node
.avl
);
362 interface_do_reload(struct interface
*iface
)
364 interface_event(iface
, IFEV_RELOAD
);
365 interface_cleanup_state(iface
);
366 proto_init_interface(iface
, iface
->config
);
367 interface_claim_device(iface
);
371 interface_handle_config_change(struct interface
*iface
)
373 enum interface_config_state state
= iface
->config_state
;
375 iface
->config_state
= IFC_NORMAL
;
380 interface_do_reload(iface
);
383 interface_do_free(iface
);
386 if (iface
->autostart
&& iface
->available
)
387 interface_set_up(iface
);
391 interface_proto_cb(struct interface_proto_state
*state
, enum interface_proto_event ev
)
393 struct interface
*iface
= state
->iface
;
397 if (iface
->state
!= IFS_SETUP
)
400 interface_ip_set_enabled(&iface
->config_ip
, true);
401 system_flush_routes();
402 iface
->state
= IFS_UP
;
403 iface
->start_time
= system_get_rtime();
404 interface_event(iface
, IFEV_UP
);
405 netifd_log_message(L_NOTICE
, "Interface '%s' is now up\n", iface
->name
);
408 if (iface
->state
== IFS_DOWN
)
411 netifd_log_message(L_NOTICE
, "Interface '%s' is now down\n", iface
->name
);
412 mark_interface_down(iface
);
413 if (iface
->main_dev
.dev
)
414 device_release(&iface
->main_dev
);
415 interface_handle_config_change(iface
);
417 case IFPEV_LINK_LOST
:
418 if (iface
->state
!= IFS_UP
)
421 netifd_log_message(L_NOTICE
, "Interface '%s' has lost the connection\n", iface
->name
);
422 mark_interface_down(iface
);
423 iface
->state
= IFS_SETUP
;
427 interface_write_resolv_conf();
430 void interface_set_proto_state(struct interface
*iface
, struct interface_proto_state
*state
)
433 iface
->proto
->free(iface
->proto
);
436 iface
->state
= IFS_DOWN
;
437 iface
->proto
= state
;
441 state
->proto_event
= interface_proto_cb
;
442 state
->iface
= iface
;
446 interface_init(struct interface
*iface
, const char *name
,
447 struct blob_attr
*config
)
449 struct blob_attr
*tb
[IFACE_ATTR_MAX
];
450 struct blob_attr
*cur
;
451 const char *proto_name
= NULL
;
453 strncpy(iface
->name
, name
, sizeof(iface
->name
) - 1);
454 INIT_LIST_HEAD(&iface
->errors
);
455 INIT_LIST_HEAD(&iface
->users
);
456 INIT_LIST_HEAD(&iface
->hotplug_list
);
457 interface_ip_init(iface
);
458 avl_init(&iface
->data
, avl_strcmp
, false, NULL
);
459 iface
->config_ip
.enabled
= false;
461 iface
->main_dev
.cb
= interface_cb
;
463 blobmsg_parse(iface_attrs
, IFACE_ATTR_MAX
, tb
,
464 blob_data(config
), blob_len(config
));
466 if ((cur
= tb
[IFACE_ATTR_PROTO
]))
467 proto_name
= blobmsg_data(cur
);
469 proto_attach_interface(iface
, proto_name
);
471 iface
->autostart
= blobmsg_get_bool_default(tb
[IFACE_ATTR_AUTO
], true);
472 iface
->proto_ip
.no_defaultroute
=
473 !blobmsg_get_bool_default(tb
[IFACE_ATTR_DEFAULTROUTE
], true);
474 iface
->proto_ip
.no_dns
=
475 !blobmsg_get_bool_default(tb
[IFACE_ATTR_PEERDNS
], true);
477 if ((cur
= tb
[IFACE_ATTR_DNS
]))
478 interface_add_dns_server_list(&iface
->config_ip
, cur
);
480 if ((cur
= tb
[IFACE_ATTR_DNS_SEARCH
]))
481 interface_add_dns_search_list(&iface
->config_ip
, cur
);
483 if ((cur
= tb
[IFACE_ATTR_METRIC
]))
484 iface
->metric
= blobmsg_get_u32(cur
);
486 iface
->config_autostart
= iface
->autostart
;
489 static bool __interface_add(struct interface
*iface
, struct blob_attr
*config
, bool alias
)
491 struct blob_attr
*tb
[IFACE_ATTR_MAX
];
492 struct blob_attr
*cur
;
494 blobmsg_parse(iface_attrs
, IFACE_ATTR_MAX
, tb
,
495 blob_data(config
), blob_len(config
));
498 if ((cur
= tb
[IFACE_ATTR_INTERFACE
]))
499 iface
->parent_ifname
= blobmsg_data(cur
);
501 if (!iface
->parent_ifname
)
504 if ((cur
= tb
[IFACE_ATTR_IFNAME
]))
505 iface
->ifname
= blobmsg_data(cur
);
509 iface
->config
= config
;
510 vlist_add(&interfaces
, &iface
->node
, iface
->name
);
515 interface_add(struct interface
*iface
, struct blob_attr
*config
)
517 __interface_add(iface
, config
, false);
521 interface_add_alias(struct interface
*iface
, struct blob_attr
*config
)
523 if (iface
->proto_handler
->flags
& PROTO_FLAG_NODEV
)
526 return __interface_add(iface
, config
, true);
530 interface_set_l3_dev(struct interface
*iface
, struct device
*dev
)
532 bool enabled
= iface
->config_ip
.enabled
;
533 bool claimed
= iface
->l3_dev
.claimed
;
535 if (iface
->l3_dev
.dev
== dev
)
538 interface_ip_set_enabled(&iface
->config_ip
, false);
539 interface_ip_flush(&iface
->proto_ip
);
540 device_add_user(&iface
->l3_dev
, dev
);
544 device_claim(&iface
->l3_dev
);
545 interface_ip_set_enabled(&iface
->config_ip
, enabled
);
550 interface_set_main_dev(struct interface
*iface
, struct device
*dev
)
552 bool set_l3
= (iface
->main_dev
.dev
== iface
->l3_dev
.dev
);
553 bool claimed
= iface
->l3_dev
.claimed
;
555 if (iface
->main_dev
.dev
== dev
)
559 interface_set_l3_dev(iface
, dev
);
561 device_add_user(&iface
->main_dev
, dev
);
563 device_claim(&iface
->l3_dev
);
565 if (!iface
->l3_dev
.dev
)
566 interface_set_l3_dev(iface
, dev
);
570 interface_remove_link(struct interface
*iface
, struct device
*dev
)
572 struct device
*mdev
= iface
->main_dev
.dev
;
574 if (mdev
&& mdev
->hotplug_ops
)
575 return mdev
->hotplug_ops
->del(mdev
, dev
);
577 if (!iface
->main_dev
.hotplug
)
578 return UBUS_STATUS_INVALID_ARGUMENT
;
580 if (dev
!= iface
->main_dev
.dev
)
581 return UBUS_STATUS_INVALID_ARGUMENT
;
583 device_remove_user(&iface
->main_dev
);
588 interface_add_link(struct interface
*iface
, struct device
*dev
)
590 struct device
*mdev
= iface
->main_dev
.dev
;
595 if (iface
->main_dev
.hotplug
)
596 device_remove_user(&iface
->main_dev
);
599 if (mdev
->hotplug_ops
)
600 return mdev
->hotplug_ops
->add(mdev
, dev
);
602 return UBUS_STATUS_NOT_SUPPORTED
;
605 interface_set_main_dev(iface
, dev
);
606 iface
->main_dev
.hotplug
= true;
611 interface_set_up(struct interface
*iface
)
615 iface
->autostart
= true;
617 if (iface
->state
!= IFS_DOWN
)
620 interface_clear_errors(iface
);
621 if (!iface
->available
) {
622 interface_add_error(iface
, "interface", "NO_DEVICE", NULL
, 0);
626 if (iface
->main_dev
.dev
) {
627 ret
= device_claim(&iface
->main_dev
);
632 iface
->state
= IFS_SETUP
;
633 ret
= interface_proto_event(iface
->proto
, PROTO_CMD_SETUP
, false);
635 mark_interface_down(iface
);
643 interface_set_down(struct interface
*iface
)
646 vlist_for_each_element(&interfaces
, iface
, node
)
647 __interface_set_down(iface
, false);
649 iface
->autostart
= false;
650 __interface_set_down(iface
, false);
657 interface_start_pending(void)
659 struct interface
*iface
;
661 vlist_for_each_element(&interfaces
, iface
, node
) {
662 if (iface
->available
&& iface
->autostart
)
663 interface_set_up(iface
);
668 set_config_state(struct interface
*iface
, enum interface_config_state s
)
670 iface
->config_state
= s
;
671 if (iface
->state
== IFS_DOWN
)
672 interface_handle_config_change(iface
);
674 __interface_set_down(iface
, false);
678 interface_update_start(struct interface
*iface
)
680 interface_ip_update_start(&iface
->proto_ip
);
684 interface_update_complete(struct interface
*iface
)
686 interface_ip_update_complete(&iface
->proto_ip
);
690 interface_replace_dns(struct interface_ip_settings
*new, struct interface_ip_settings
*old
)
692 vlist_simple_replace(&new->dns_servers
, &old
->dns_servers
);
693 vlist_simple_replace(&new->dns_search
, &old
->dns_search
);
697 interface_change_config(struct interface
*if_old
, struct interface
*if_new
)
699 struct blob_attr
*old_config
= if_old
->config
;
700 const char *old_ifname
= if_old
->ifname
;
701 const char *old_parent_ifname
= if_old
->parent_ifname
;
702 const struct proto_handler
*proto
= if_old
->proto_handler
;
704 interface_clear_errors(if_old
);
705 if_old
->config
= if_new
->config
;
706 if (!if_old
->config_autostart
&& if_new
->config_autostart
)
707 if_old
->autostart
= true;
709 if_old
->device_config
= if_new
->device_config
;
710 if_old
->config_autostart
= if_new
->config_autostart
;
711 if_old
->ifname
= if_new
->ifname
;
712 if_old
->parent_ifname
= if_new
->parent_ifname
;
713 if_old
->proto_handler
= if_new
->proto_handler
;
715 if_old
->proto_ip
.no_dns
= if_new
->proto_ip
.no_dns
;
716 interface_replace_dns(&if_old
->config_ip
, &if_new
->config_ip
);
718 #define FIELD_CHANGED_STR(field) \
719 ((!!if_old->field != !!old_ ## field) || \
721 strcmp(old_ ## field, if_old->field) != 0))
723 if (FIELD_CHANGED_STR(parent_ifname
)) {
724 if (if_old
->parent_iface
.iface
)
725 interface_remove_user(&if_old
->parent_iface
);
729 if (FIELD_CHANGED_STR(ifname
) || proto
!= if_new
->proto_handler
) {
730 D(INTERFACE
, "Reload interface '%s' because of ifname/proto change\n",
735 if (!proto
->config_params
)
736 D(INTERFACE
, "No config parameters for interface '%s'\n",
738 else if (!config_check_equal(old_config
, if_new
->config
,
739 proto
->config_params
)) {
740 D(INTERFACE
, "Reload interface '%s because of config changes\n",
745 #define UPDATE(field) ({ \
746 bool __changed = (if_old->field != if_new->field); \
747 if_old->field = if_new->field; \
751 if (UPDATE(metric
) || UPDATE(proto_ip
.no_defaultroute
)) {
752 interface_ip_set_enabled(&if_old
->config_ip
, false);
753 interface_ip_set_enabled(&if_old
->config_ip
, if_new
->config_ip
.enabled
);
754 interface_ip_set_enabled(&if_old
->proto_ip
, false);
755 interface_ip_set_enabled(&if_old
->proto_ip
, if_new
->proto_ip
.enabled
);
758 interface_write_resolv_conf();
765 set_config_state(if_old
, IFC_RELOAD
);
767 if_new
->config
= NULL
;
768 interface_cleanup(if_new
);
774 interface_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
775 struct vlist_node
*node_old
)
777 struct interface
*if_old
= container_of(node_old
, struct interface
, node
);
778 struct interface
*if_new
= container_of(node_new
, struct interface
, node
);
780 if (node_old
&& node_new
) {
781 D(INTERFACE
, "Update interface '%s'\n", if_new
->name
);
782 interface_change_config(if_old
, if_new
);
783 } else if (node_old
) {
784 D(INTERFACE
, "Remove interface '%s'\n", if_old
->name
);
785 set_config_state(if_old
, IFC_REMOVE
);
786 } else if (node_new
) {
787 D(INTERFACE
, "Create interface '%s'\n", if_new
->name
);
788 proto_init_interface(if_new
, if_new
->config
);
789 interface_claim_device(if_new
);
790 netifd_ubus_add_interface(if_new
);
796 interface_init_list(void)
798 vlist_init(&interfaces
, avl_strcmp
, interface_update
);
799 interfaces
.keep_old
= true;
800 interfaces
.no_delete
= true;