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
->main_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);
326 interface_cleanup(struct interface
*iface
, bool reload
)
328 struct interface_user
*dep
, *tmp
;
330 if (iface
->parent_iface
.iface
)
331 interface_remove_user(&iface
->parent_iface
);
333 list_for_each_entry_safe(dep
, tmp
, &iface
->users
, list
)
334 interface_remove_user(dep
);
336 interface_ip_flush(&iface
->config_ip
);
337 interface_flush_state(iface
);
338 interface_clear_errors(iface
);
340 if (iface
->main_dev
.dev
&& !reload
)
341 interface_set_main_dev(iface
, NULL
);
342 interface_set_proto_state(iface
, NULL
);
346 interface_do_free(struct interface
*iface
)
348 interface_event(iface
, IFEV_FREE
);
349 interface_cleanup(iface
, false);
351 netifd_ubus_remove_interface(iface
);
352 avl_delete(&interfaces
.avl
, &iface
->node
.avl
);
357 interface_do_reload(struct interface
*iface
)
359 interface_event(iface
, IFEV_RELOAD
);
360 interface_cleanup(iface
, true);
361 proto_init_interface(iface
, iface
->config
);
362 interface_claim_device(iface
);
366 interface_handle_config_change(struct interface
*iface
)
368 enum interface_config_state state
= iface
->config_state
;
370 iface
->config_state
= IFC_NORMAL
;
375 interface_do_reload(iface
);
378 interface_do_free(iface
);
381 if (iface
->autostart
&& iface
->available
)
382 interface_set_up(iface
);
386 interface_proto_cb(struct interface_proto_state
*state
, enum interface_proto_event ev
)
388 struct interface
*iface
= state
->iface
;
392 if (iface
->state
!= IFS_SETUP
)
395 interface_ip_set_enabled(&iface
->config_ip
, true);
396 system_flush_routes();
397 iface
->state
= IFS_UP
;
398 iface
->start_time
= system_get_rtime();
399 interface_event(iface
, IFEV_UP
);
400 netifd_log_message(L_NOTICE
, "Interface '%s' is now up\n", iface
->name
);
403 if (iface
->state
== IFS_DOWN
)
406 netifd_log_message(L_NOTICE
, "Interface '%s' is now down\n", iface
->name
);
407 mark_interface_down(iface
);
408 if (iface
->main_dev
.dev
)
409 device_release(&iface
->main_dev
);
410 interface_handle_config_change(iface
);
412 case IFPEV_LINK_LOST
:
413 if (iface
->state
!= IFS_UP
)
416 netifd_log_message(L_NOTICE
, "Interface '%s' has lost the connection\n", iface
->name
);
417 mark_interface_down(iface
);
418 iface
->state
= IFS_SETUP
;
422 interface_write_resolv_conf();
425 void interface_set_proto_state(struct interface
*iface
, struct interface_proto_state
*state
)
428 iface
->proto
->free(iface
->proto
);
431 iface
->state
= IFS_DOWN
;
432 iface
->proto
= state
;
436 state
->proto_event
= interface_proto_cb
;
437 state
->iface
= iface
;
441 interface_init(struct interface
*iface
, const char *name
,
442 struct blob_attr
*config
)
444 struct blob_attr
*tb
[IFACE_ATTR_MAX
];
445 struct blob_attr
*cur
;
446 const char *proto_name
= NULL
;
448 strncpy(iface
->name
, name
, sizeof(iface
->name
) - 1);
449 INIT_LIST_HEAD(&iface
->errors
);
450 INIT_LIST_HEAD(&iface
->users
);
451 INIT_LIST_HEAD(&iface
->hotplug_list
);
452 interface_ip_init(iface
);
453 avl_init(&iface
->data
, avl_strcmp
, false, NULL
);
454 iface
->config_ip
.enabled
= false;
456 iface
->main_dev
.cb
= interface_cb
;
458 blobmsg_parse(iface_attrs
, IFACE_ATTR_MAX
, tb
,
459 blob_data(config
), blob_len(config
));
461 if ((cur
= tb
[IFACE_ATTR_PROTO
]))
462 proto_name
= blobmsg_data(cur
);
464 proto_attach_interface(iface
, proto_name
);
466 iface
->autostart
= blobmsg_get_bool_default(tb
[IFACE_ATTR_AUTO
], true);
467 iface
->proto_ip
.no_defaultroute
=
468 !blobmsg_get_bool_default(tb
[IFACE_ATTR_DEFAULTROUTE
], true);
469 iface
->proto_ip
.no_dns
=
470 !blobmsg_get_bool_default(tb
[IFACE_ATTR_PEERDNS
], true);
472 if ((cur
= tb
[IFACE_ATTR_DNS
]))
473 interface_add_dns_server_list(&iface
->config_ip
, cur
);
475 if ((cur
= tb
[IFACE_ATTR_DNS_SEARCH
]))
476 interface_add_dns_search_list(&iface
->config_ip
, cur
);
478 if ((cur
= tb
[IFACE_ATTR_METRIC
]))
479 iface
->metric
= blobmsg_get_u32(cur
);
481 iface
->config_autostart
= iface
->autostart
;
484 static bool __interface_add(struct interface
*iface
, struct blob_attr
*config
, bool alias
)
486 struct blob_attr
*tb
[IFACE_ATTR_MAX
];
487 struct blob_attr
*cur
;
489 blobmsg_parse(iface_attrs
, IFACE_ATTR_MAX
, tb
,
490 blob_data(config
), blob_len(config
));
493 if ((cur
= tb
[IFACE_ATTR_INTERFACE
]))
494 iface
->parent_ifname
= blobmsg_data(cur
);
496 if (!iface
->parent_ifname
)
499 if ((cur
= tb
[IFACE_ATTR_IFNAME
]))
500 iface
->ifname
= blobmsg_data(cur
);
504 iface
->config
= config
;
505 vlist_add(&interfaces
, &iface
->node
, iface
->name
);
510 interface_add(struct interface
*iface
, struct blob_attr
*config
)
512 __interface_add(iface
, config
, false);
516 interface_add_alias(struct interface
*iface
, struct blob_attr
*config
)
518 if (iface
->proto_handler
->flags
& PROTO_FLAG_NODEV
)
521 return __interface_add(iface
, config
, true);
525 interface_set_l3_dev(struct interface
*iface
, struct device
*dev
)
527 bool enabled
= iface
->config_ip
.enabled
;
528 bool claimed
= iface
->l3_dev
.claimed
;
530 if (iface
->l3_dev
.dev
== dev
)
533 interface_ip_set_enabled(&iface
->config_ip
, false);
534 interface_ip_flush(&iface
->proto_ip
);
535 device_add_user(&iface
->l3_dev
, dev
);
539 device_claim(&iface
->l3_dev
);
540 interface_ip_set_enabled(&iface
->config_ip
, enabled
);
545 interface_set_main_dev(struct interface
*iface
, struct device
*dev
)
547 bool set_l3
= (iface
->main_dev
.dev
== iface
->l3_dev
.dev
);
548 bool claimed
= iface
->l3_dev
.claimed
;
550 if (iface
->main_dev
.dev
== dev
)
554 interface_set_l3_dev(iface
, dev
);
556 device_add_user(&iface
->main_dev
, dev
);
558 device_claim(&iface
->l3_dev
);
560 if (!iface
->l3_dev
.dev
)
561 interface_set_l3_dev(iface
, dev
);
565 interface_remove_link(struct interface
*iface
, struct device
*dev
)
567 struct device
*mdev
= iface
->main_dev
.dev
;
569 if (mdev
&& mdev
->hotplug_ops
)
570 return mdev
->hotplug_ops
->del(mdev
, dev
);
572 if (!iface
->main_dev
.hotplug
)
573 return UBUS_STATUS_INVALID_ARGUMENT
;
575 if (dev
!= iface
->main_dev
.dev
)
576 return UBUS_STATUS_INVALID_ARGUMENT
;
578 device_remove_user(&iface
->main_dev
);
583 interface_add_link(struct interface
*iface
, struct device
*dev
)
585 struct device
*mdev
= iface
->main_dev
.dev
;
590 if (iface
->main_dev
.hotplug
)
591 device_remove_user(&iface
->main_dev
);
594 if (mdev
->hotplug_ops
)
595 return mdev
->hotplug_ops
->add(mdev
, dev
);
597 return UBUS_STATUS_NOT_SUPPORTED
;
600 interface_set_main_dev(iface
, dev
);
601 iface
->main_dev
.hotplug
= true;
606 interface_set_up(struct interface
*iface
)
610 iface
->autostart
= true;
612 if (iface
->state
!= IFS_DOWN
)
615 interface_clear_errors(iface
);
616 if (!iface
->available
) {
617 interface_add_error(iface
, "interface", "NO_DEVICE", NULL
, 0);
621 if (iface
->main_dev
.dev
) {
622 ret
= device_claim(&iface
->main_dev
);
627 iface
->state
= IFS_SETUP
;
628 ret
= interface_proto_event(iface
->proto
, PROTO_CMD_SETUP
, false);
630 mark_interface_down(iface
);
638 interface_set_down(struct interface
*iface
)
641 vlist_for_each_element(&interfaces
, iface
, node
)
642 __interface_set_down(iface
, false);
644 iface
->autostart
= false;
645 __interface_set_down(iface
, false);
652 interface_start_pending(void)
654 struct interface
*iface
;
656 vlist_for_each_element(&interfaces
, iface
, node
) {
657 if (iface
->available
&& iface
->autostart
)
658 interface_set_up(iface
);
663 set_config_state(struct interface
*iface
, enum interface_config_state s
)
665 iface
->config_state
= s
;
666 if (iface
->state
== IFS_DOWN
)
667 interface_handle_config_change(iface
);
669 __interface_set_down(iface
, false);
673 interface_update_start(struct interface
*iface
)
675 interface_ip_update_start(&iface
->proto_ip
);
679 interface_update_complete(struct interface
*iface
)
681 interface_ip_update_complete(&iface
->proto_ip
);
685 interface_replace_dns(struct interface_ip_settings
*new, struct interface_ip_settings
*old
)
687 vlist_simple_replace(&new->dns_servers
, &old
->dns_servers
);
688 vlist_simple_replace(&new->dns_search
, &old
->dns_search
);
692 interface_change_config(struct interface
*if_old
, struct interface
*if_new
)
694 struct blob_attr
*old_config
= if_old
->config
;
695 const char *old_ifname
= if_old
->ifname
;
696 const char *old_parent_ifname
= if_old
->parent_ifname
;
697 const struct proto_handler
*proto
= if_old
->proto_handler
;
699 interface_clear_errors(if_old
);
700 if_old
->config
= if_new
->config
;
701 if (!if_old
->config_autostart
&& if_new
->config_autostart
)
702 if_old
->autostart
= true;
704 if_old
->device_config
= if_new
->device_config
;
705 if_old
->config_autostart
= if_new
->config_autostart
;
706 if_old
->ifname
= if_new
->ifname
;
707 if_old
->parent_ifname
= if_new
->parent_ifname
;
708 if_old
->proto_handler
= if_new
->proto_handler
;
710 #define FIELD_CHANGED_STR(field) \
711 ((!!if_old->field != !!old_ ## field) || \
713 strcmp(old_ ## field, if_old->field) != 0))
715 if (FIELD_CHANGED_STR(parent_ifname
)) {
716 if (if_old
->parent_iface
.iface
)
717 interface_remove_user(&if_old
->parent_iface
);
721 if (FIELD_CHANGED_STR(ifname
) || proto
!= if_new
->proto_handler
) {
722 D(INTERFACE
, "Reload interface '%s' because of ifname/proto change\n",
727 if (!proto
->config_params
)
728 D(INTERFACE
, "No config parameters for interface '%s'\n",
730 else if (!config_check_equal(old_config
, if_new
->config
,
731 proto
->config_params
)) {
732 D(INTERFACE
, "Reload interface '%s because of config changes\n",
737 #define UPDATE(field) ({ \
738 bool __changed = (if_old->field != if_new->field); \
739 if_old->field = if_new->field; \
743 if (UPDATE(metric
) || UPDATE(proto_ip
.no_defaultroute
)) {
744 interface_ip_set_enabled(&if_old
->config_ip
, false);
745 interface_ip_set_enabled(&if_old
->config_ip
, if_new
->config_ip
.enabled
);
746 interface_ip_set_enabled(&if_old
->proto_ip
, false);
747 interface_ip_set_enabled(&if_old
->proto_ip
, if_new
->proto_ip
.enabled
);
750 UPDATE(proto_ip
.no_dns
);
751 interface_replace_dns(&if_old
->config_ip
, &if_new
->config_ip
);
752 interface_write_resolv_conf();
759 set_config_state(if_old
, IFC_RELOAD
);
761 if_new
->config
= NULL
;
762 interface_cleanup(if_new
, false);
768 interface_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
769 struct vlist_node
*node_old
)
771 struct interface
*if_old
= container_of(node_old
, struct interface
, node
);
772 struct interface
*if_new
= container_of(node_new
, struct interface
, node
);
774 if (node_old
&& node_new
) {
775 D(INTERFACE
, "Update interface '%s'\n", if_new
->name
);
776 interface_change_config(if_old
, if_new
);
777 } else if (node_old
) {
778 D(INTERFACE
, "Remove interface '%s'\n", if_old
->name
);
779 set_config_state(if_old
, IFC_REMOVE
);
780 } else if (node_new
) {
781 D(INTERFACE
, "Create interface '%s'\n", if_new
->name
);
782 proto_init_interface(if_new
, if_new
->config
);
783 interface_claim_device(if_new
);
784 netifd_ubus_add_interface(if_new
);
790 interface_init_list(void)
792 vlist_init(&interfaces
, avl_strcmp
, interface_update
);
793 interfaces
.keep_old
= true;
794 interfaces
.no_delete
= true;