2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2012 Steven Barth <steven@midlink.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
20 #include <arpa/inet.h>
24 #include "interface.h"
25 #include "interface-ip.h"
42 static const struct blobmsg_policy route_attr
[__ROUTE_MAX
] = {
43 [ROUTE_INTERFACE
] = { .name
= "interface", .type
= BLOBMSG_TYPE_STRING
},
44 [ROUTE_TARGET
] = { .name
= "target", .type
= BLOBMSG_TYPE_STRING
},
45 [ROUTE_MASK
] = { .name
= "netmask", .type
= BLOBMSG_TYPE_STRING
},
46 [ROUTE_GATEWAY
] = { .name
= "gateway", .type
= BLOBMSG_TYPE_STRING
},
47 [ROUTE_METRIC
] = { .name
= "metric", .type
= BLOBMSG_TYPE_INT32
},
48 [ROUTE_MTU
] = { .name
= "mtu", .type
= BLOBMSG_TYPE_INT32
},
49 [ROUTE_TABLE
] = { .name
= "table", .type
= BLOBMSG_TYPE_STRING
},
50 [ROUTE_VALID
] = { .name
= "valid", .type
= BLOBMSG_TYPE_INT32
},
53 const struct config_param_list route_attr_list
= {
54 .n_params
= __ROUTE_MAX
,
59 struct list_head prefixes
= LIST_HEAD_INIT(prefixes
);
60 static struct device_prefix
*ula_prefix
= NULL
;
61 static struct uloop_timeout valid_until_timeout
;
65 clear_if_addr(union if_addr
*a
, int mask
)
67 int m_bytes
= (mask
+ 7) / 8;
68 uint8_t m_clear
= (1 << (m_bytes
* 8 - mask
)) - 1;
69 uint8_t *p
= (uint8_t *) a
;
71 if (m_bytes
< sizeof(a
))
72 memset(p
+ m_bytes
, 0, sizeof(a
) - m_bytes
);
74 p
[m_bytes
- 1] &= ~m_clear
;
78 match_if_addr(union if_addr
*a1
, union if_addr
*a2
, int mask
)
80 union if_addr
*p1
, *p2
;
82 p1
= alloca(sizeof(*a1
));
83 p2
= alloca(sizeof(*a2
));
85 memcpy(p1
, a1
, sizeof(*a1
));
86 clear_if_addr(p1
, mask
);
87 memcpy(p2
, a2
, sizeof(*a2
));
88 clear_if_addr(p2
, mask
);
90 return !memcmp(p1
, p2
, sizeof(*p1
));
93 static int set_ip_source_policy(bool add
, bool v6
, unsigned int priority
,
94 const union if_addr
*addr
, uint8_t mask
, struct interface
*iface
)
98 struct iprule rule
= {
99 .flags
= IPRULE_SRC
| IPRULE_LOOKUP
| IPRULE_PRIORITY
,
100 .priority
= priority
,
101 .lookup
= (v6
) ? iface
->ip6table
: iface
->ip4table
,
109 rule
.flags
|= (v6
) ? IPRULE_INET6
: IPRULE_INET4
;
111 return (add
) ? system_add_iprule(&rule
) : system_del_iprule(&rule
);
114 static int set_ip_lo_policy(bool add
, bool v6
, struct interface
*iface
)
116 struct iprule rule
= {
117 .flags
= IPRULE_IN
| IPRULE_LOOKUP
| IPRULE_PRIORITY
,
118 .priority
= IPRULE_PRIORITY_NW
+ iface
->l3_dev
.dev
->ifindex
,
119 .lookup
= (v6
) ? iface
->ip6table
: iface
->ip4table
,
126 rule
.flags
|= (v6
) ? IPRULE_INET6
: IPRULE_INET4
;
128 return (add
) ? system_add_iprule(&rule
) : system_del_iprule(&rule
);
132 __find_ip_addr_target(struct interface_ip_settings
*ip
, union if_addr
*a
, bool v6
)
134 struct device_addr
*addr
;
136 vlist_for_each_element(&ip
->addr
, addr
, node
) {
140 if (v6
!= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
))
143 // Handle offlink addresses correctly
144 unsigned int mask
= addr
->mask
;
145 if ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
&&
146 (addr
->flags
& DEVADDR_OFFLINK
))
149 if (!match_if_addr(&addr
->addr
, a
, mask
))
159 __find_ip_route_target(struct interface_ip_settings
*ip
, union if_addr
*a
,
160 bool v6
, struct device_route
**res
)
162 struct device_route
*route
;
164 vlist_for_each_element(&ip
->route
, route
, node
) {
168 if (v6
!= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
))
171 if (!match_if_addr(&route
->addr
, a
, route
->mask
))
174 if (route
->flags
& DEVROUTE_TABLE
)
177 if (!*res
|| route
->mask
< (*res
)->mask
)
183 interface_ip_find_addr_target(struct interface
*iface
, union if_addr
*a
, bool v6
)
185 return __find_ip_addr_target(&iface
->proto_ip
, a
, v6
) ||
186 __find_ip_addr_target(&iface
->config_ip
, a
, v6
);
190 interface_ip_find_route_target(struct interface
*iface
, union if_addr
*a
,
191 bool v6
, struct device_route
**route
)
193 __find_ip_route_target(&iface
->proto_ip
, a
, v6
, route
);
194 __find_ip_route_target(&iface
->config_ip
, a
, v6
, route
);
198 interface_ip_add_target_route(union if_addr
*addr
, bool v6
, struct interface
*iface
)
200 struct device_route
*route
, *r_next
= NULL
;
201 bool defaultroute_target
= false;
202 int addrsize
= v6
? sizeof(addr
->in6
) : sizeof(addr
->in
);
204 route
= calloc(1, sizeof(*route
));
208 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
209 route
->mask
= v6
? 128 : 32;
210 if (memcmp(&route
->addr
, addr
, addrsize
) == 0)
211 defaultroute_target
= true;
213 memcpy(&route
->addr
, addr
, addrsize
);
216 /* look for locally addressable target first */
217 if (interface_ip_find_addr_target(iface
, addr
, v6
))
220 /* do not stop at the first route, let the lookup compare
221 * masks to find the best match */
222 interface_ip_find_route_target(iface
, addr
, v6
, &r_next
);
224 vlist_for_each_element(&interfaces
, iface
, node
) {
225 /* look for locally addressable target first */
226 if (interface_ip_find_addr_target(iface
, addr
, v6
))
229 /* do not stop at the first route, let the lookup compare
230 * masks to find the best match */
231 interface_ip_find_route_target(iface
, addr
, v6
, &r_next
);
240 iface
= r_next
->iface
;
241 memcpy(&route
->nexthop
, &r_next
->nexthop
, sizeof(route
->nexthop
));
242 route
->mtu
= r_next
->mtu
;
243 route
->metric
= r_next
->metric
;
244 route
->table
= r_next
->table
;
247 route
->iface
= iface
;
248 if (defaultroute_target
)
251 vlist_add(&iface
->host_routes
, &route
->node
, route
);
256 interface_ip_add_route(struct interface
*iface
, struct blob_attr
*attr
, bool v6
)
258 struct interface_ip_settings
*ip
;
259 struct blob_attr
*tb
[__ROUTE_MAX
], *cur
;
260 struct device_route
*route
;
261 int af
= v6
? AF_INET6
: AF_INET
;
262 bool is_proto_route
= !!iface
;
264 blobmsg_parse(route_attr
, __ROUTE_MAX
, tb
, blobmsg_data(attr
), blobmsg_data_len(attr
));
267 if ((cur
= tb
[ROUTE_INTERFACE
]) == NULL
)
270 iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
274 ip
= &iface
->config_ip
;
276 ip
= &iface
->proto_ip
;
279 route
= calloc(1, sizeof(*route
));
283 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
284 route
->mask
= v6
? 128 : 32;
285 if ((cur
= tb
[ROUTE_MASK
]) != NULL
) {
286 route
->mask
= parse_netmask_string(blobmsg_data(cur
), v6
);
287 if (route
->mask
> (v6
? 128 : 32))
291 if ((cur
= tb
[ROUTE_TARGET
]) != NULL
) {
292 if (!parse_ip_and_netmask(af
, blobmsg_data(cur
), &route
->addr
, &route
->mask
)) {
293 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur
));
298 if ((cur
= tb
[ROUTE_GATEWAY
]) != NULL
) {
299 if (!inet_pton(af
, blobmsg_data(cur
), &route
->nexthop
)) {
300 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur
));
305 if ((cur
= tb
[ROUTE_METRIC
]) != NULL
) {
306 route
->metric
= blobmsg_get_u32(cur
);
307 route
->flags
|= DEVROUTE_METRIC
;
310 if ((cur
= tb
[ROUTE_MTU
]) != NULL
) {
311 route
->mtu
= blobmsg_get_u32(cur
);
312 route
->flags
|= DEVROUTE_MTU
;
315 // Use source-based routing
316 if (is_proto_route
) {
317 route
->table
= (v6
) ? iface
->ip6table
: iface
->ip4table
;
318 route
->flags
|= DEVROUTE_SRCTABLE
;
321 if ((cur
= tb
[ROUTE_TABLE
]) != NULL
) {
322 if (!system_resolve_rt_table(blobmsg_data(cur
), &route
->table
)) {
323 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur
));
328 route
->flags
|= DEVROUTE_TABLE
;
331 if ((cur
= tb
[ROUTE_VALID
]) != NULL
)
332 route
->valid_until
= system_get_rtime() + blobmsg_get_u32(cur
);
334 vlist_add(&ip
->route
, &route
->node
, route
);
342 addr_cmp(const void *k1
, const void *k2
, void *ptr
)
344 return memcmp(k1
, k2
, sizeof(struct device_addr
) -
345 offsetof(struct device_addr
, flags
));
349 route_cmp(const void *k1
, const void *k2
, void *ptr
)
351 const struct device_route
*r1
= k1
, *r2
= k2
;
353 if (r1
->mask
!= r2
->mask
)
354 return r2
->mask
- r1
->mask
;
356 if (r1
->metric
!= r2
->metric
)
357 return r1
->metric
- r2
->metric
;
359 if (r1
->flags
!= r2
->flags
)
360 return r2
->flags
- r1
->flags
;
362 return memcmp(&r1
->addr
, &r2
->addr
, sizeof(r1
->addr
));
366 prefix_cmp(const void *k1
, const void *k2
, void *ptr
)
368 return memcmp(k1
, k2
, sizeof(struct device_prefix
) -
369 offsetof(struct device_prefix
, addr
));
373 interface_handle_subnet_route(struct interface
*iface
, struct device_addr
*addr
, bool add
)
375 struct device
*dev
= iface
->l3_dev
.dev
;
376 struct device_route route
;
378 memset(&route
, 0, sizeof(route
));
380 route
.flags
= addr
->flags
;
381 route
.mask
= addr
->mask
;
382 memcpy(&route
.addr
, &addr
->addr
, sizeof(route
.addr
));
383 clear_if_addr(&route
.addr
, route
.mask
);
386 route
.flags
|= DEVADDR_KERNEL
;
387 system_del_route(dev
, &route
);
389 if (!(addr
->flags
& DEVADDR_OFFLINK
)) {
390 route
.flags
&= ~DEVADDR_KERNEL
;
391 route
.metric
= iface
->metric
;
392 system_add_route(dev
, &route
);
395 if (!(addr
->flags
& DEVADDR_OFFLINK
))
396 system_del_route(dev
, &route
);
401 interface_update_proto_addr(struct vlist_tree
*tree
,
402 struct vlist_node
*node_new
,
403 struct vlist_node
*node_old
)
405 struct interface_ip_settings
*ip
;
406 struct interface
*iface
;
408 struct device_addr
*a_new
= NULL
, *a_old
= NULL
;
412 ip
= container_of(tree
, struct interface_ip_settings
, addr
);
414 dev
= iface
->l3_dev
.dev
;
417 a_new
= container_of(node_new
, struct device_addr
, node
);
419 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
423 uint32_t *a
= (uint32_t *) &a_new
->addr
;
425 mask
>>= a_new
->mask
;
426 a_new
->broadcast
= *a
| htonl(mask
);
431 a_old
= container_of(node_old
, struct device_addr
, node
);
433 if (a_new
&& a_old
) {
436 if (a_old
->flags
!= a_new
->flags
||
437 a_old
->valid_until
!= a_new
->valid_until
||
438 a_old
->preferred_until
!= a_new
->preferred_until
)
441 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
442 a_new
->broadcast
!= a_old
->broadcast
)
447 if (!(a_old
->flags
& DEVADDR_EXTERNAL
) && a_old
->enabled
&& !keep
) {
448 interface_handle_subnet_route(iface
, a_old
, false);
450 if ((a_old
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
)
453 //This is needed for source routing to work correctly. If a device
454 //has two connections to a network using the same subnet, adding
455 //only the network-rule will cause packets to be routed through the
456 //first matching network (source IP matches both masks).
457 set_ip_source_policy(false, v6
, IPRULE_PRIORITY_ADDR
, &a_old
->addr
,
458 (v6
) ? 128 : 32, iface
);
459 set_ip_source_policy(false, v6
, IPRULE_PRIORITY_NW
, &a_old
->addr
,
462 system_del_address(dev
, a_old
);
468 a_new
->enabled
= true;
469 if (!(a_new
->flags
& DEVADDR_EXTERNAL
) && !keep
) {
470 system_add_address(dev
, a_new
);
472 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
)
475 set_ip_source_policy(true, v6
, IPRULE_PRIORITY_ADDR
, &a_new
->addr
,
476 (v6
) ? 128 : 32, iface
);
477 set_ip_source_policy(true, v6
, IPRULE_PRIORITY_NW
, &a_new
->addr
,
480 if ((a_new
->flags
& DEVADDR_OFFLINK
) || iface
->metric
)
481 interface_handle_subnet_route(iface
, a_new
, true);
487 enable_route(struct interface_ip_settings
*ip
, struct device_route
*route
)
489 if (ip
->no_defaultroute
&& !route
->mask
)
496 interface_update_proto_route(struct vlist_tree
*tree
,
497 struct vlist_node
*node_new
,
498 struct vlist_node
*node_old
)
500 struct interface_ip_settings
*ip
;
501 struct interface
*iface
;
503 struct device_route
*route_old
, *route_new
;
506 ip
= container_of(tree
, struct interface_ip_settings
, route
);
508 dev
= iface
->l3_dev
.dev
;
510 route_old
= container_of(node_old
, struct device_route
, node
);
511 route_new
= container_of(node_new
, struct device_route
, node
);
513 if (node_old
&& node_new
)
514 keep
= !memcmp(&route_old
->nexthop
, &route_new
->nexthop
, sizeof(route_old
->nexthop
));
517 if (!(route_old
->flags
& DEVADDR_EXTERNAL
) && route_old
->enabled
&& !keep
)
518 system_del_route(dev
, route_old
);
523 bool _enabled
= enable_route(ip
, route_new
);
525 if (!(route_new
->flags
& DEVROUTE_METRIC
))
526 route_new
->metric
= iface
->metric
;
528 if (!(route_new
->flags
& DEVADDR_EXTERNAL
) && !keep
&& _enabled
)
529 system_add_route(dev
, route_new
);
531 route_new
->iface
= iface
;
532 route_new
->enabled
= _enabled
;
537 interface_update_host_route(struct vlist_tree
*tree
,
538 struct vlist_node
*node_new
,
539 struct vlist_node
*node_old
)
541 struct interface
*iface
;
543 struct device_route
*route_old
, *route_new
;
545 iface
= container_of(tree
, struct interface
, host_routes
);
546 dev
= iface
->l3_dev
.dev
;
548 route_old
= container_of(node_old
, struct device_route
, node
);
549 route_new
= container_of(node_new
, struct device_route
, node
);
552 system_del_route(dev
, route_old
);
557 system_add_route(dev
, route_new
);
562 interface_set_prefix_address(struct device_prefix_assignment
*assignment
,
563 const struct device_prefix
*prefix
, struct interface
*iface
, bool add
);
565 static void interface_trigger_ula_prefix(struct interface
*iface
,
566 const struct device_prefix
*prefix
, bool enable
)
568 if (prefix
== ula_prefix
|| (prefix
->addr
.s6_addr
[0] & 0xfe) != 0xfc)
571 bool external_ula
= false;
572 struct device_prefix_assignment
*ula_assign
= NULL
;
573 struct device_prefix
*c
;
574 list_for_each_entry(c
, &prefixes
, head
) {
575 if (c
!= ula_prefix
&& (c
->addr
.s6_addr
[0] & 0xfe) != 0xfc)
578 struct device_prefix_assignment
*a
;
579 list_for_each_entry(a
, &c
->assignments
, head
) {
580 if (!strcmp(a
->name
, iface
->name
)) {
590 // Remove ULA assignment if there is an externally managed ULA and vice versa
591 if (ula_assign
&& ((enable
&& !external_ula
) || (!enable
&& external_ula
)))
592 interface_set_prefix_address(ula_assign
, ula_prefix
, iface
, enable
);
597 interface_set_prefix_address(struct device_prefix_assignment
*assignment
,
598 const struct device_prefix
*prefix
, struct interface
*iface
, bool add
)
600 const struct interface
*uplink
= prefix
->iface
;
601 if (!iface
->l3_dev
.dev
)
604 struct device
*l3_downlink
= iface
->l3_dev
.dev
;
606 struct device_addr addr
;
607 memset(&addr
, 0, sizeof(addr
));
608 addr
.addr
.in6
= prefix
->addr
;
609 addr
.addr
.in6
.s6_addr32
[1] |= htonl(assignment
->assigned
);
610 addr
.addr
.in6
.s6_addr
[15] += 1;
611 addr
.mask
= assignment
->length
;
612 addr
.flags
= DEVADDR_INET6
;
613 addr
.preferred_until
= prefix
->preferred_until
;
614 addr
.valid_until
= prefix
->valid_until
;
616 if (!add
&& assignment
->enabled
) {
617 time_t now
= system_get_rtime();
618 addr
.preferred_until
= now
;
619 if (!addr
.valid_until
|| addr
.valid_until
- now
> 7200)
620 addr
.valid_until
= now
+ 7200;
621 system_add_address(l3_downlink
, &addr
);
622 assignment
->enabled
= false;
624 interface_trigger_ula_prefix(iface
, prefix
, true);
625 } else if (add
&& (iface
->state
== IFS_UP
|| iface
->state
== IFS_SETUP
)) {
626 system_add_address(l3_downlink
, &addr
);
627 if (uplink
&& uplink
->l3_dev
.dev
) {
628 int mtu
= system_update_ipv6_mtu(
629 uplink
->l3_dev
.dev
, 0);
631 system_update_ipv6_mtu(l3_downlink
, mtu
);
633 assignment
->enabled
= true;
635 interface_trigger_ula_prefix(iface
, prefix
, false);
639 static bool interface_prefix_assign(struct list_head
*list
,
640 struct device_prefix_assignment
*assign
)
642 int32_t current
= 0, asize
= (1 << (64 - assign
->length
)) - 1;
643 struct device_prefix_assignment
*c
;
644 list_for_each_entry(c
, list
, head
) {
645 if (assign
->assigned
!= -1) {
646 if (assign
->assigned
> current
&& assign
->assigned
+ asize
< c
->assigned
) {
647 list_add_tail(&assign
->head
, &c
->head
);
650 } else if (assign
->assigned
== -1) {
651 current
= (current
+ asize
) & (~asize
);
652 if (current
+ asize
< c
->assigned
) {
653 assign
->assigned
= current
;
654 list_add_tail(&assign
->head
, &c
->head
);
658 current
= (c
->assigned
+ (1 << (64 - c
->length
)));
663 static void interface_update_prefix_assignments(struct device_prefix
*prefix
, bool setup
)
665 struct device_prefix_assignment
*c
;
666 struct interface
*iface
;
668 // Delete all assignments
669 while (!list_empty(&prefix
->assignments
)) {
670 c
= list_first_entry(&prefix
->assignments
,
671 struct device_prefix_assignment
, head
);
672 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
673 interface_set_prefix_address(c
, prefix
, iface
, false);
681 // End-of-assignment sentinel
682 c
= malloc(sizeof(*c
) + 1);
683 c
->assigned
= 1 << (64 - prefix
->length
);
686 list_add(&c
->head
, &prefix
->assignments
);
689 if (prefix
->excl_length
> 0) {
690 const char name
[] = "!excluded";
691 c
= malloc(sizeof(*c
) + sizeof(name
));
692 c
->assigned
= ntohl(prefix
->excl_addr
.s6_addr32
[1]) &
693 ((1 << (64 - prefix
->length
)) - 1);
694 c
->length
= prefix
->excl_length
;
695 memcpy(c
->name
, name
, sizeof(name
));
696 list_add(&c
->head
, &prefix
->assignments
);
699 struct list_head assign_later
= LIST_HEAD_INIT(assign_later
);
700 vlist_for_each_element(&interfaces
, iface
, node
) {
701 if (iface
->config_ip
.assignment_length
< 48 ||
702 iface
->config_ip
.assignment_length
> 64)
705 size_t namelen
= strlen(iface
->name
) + 1;
706 c
= malloc(sizeof(*c
) + namelen
);
707 c
->length
= iface
->config_ip
.assignment_length
;
708 c
->assigned
= iface
->config_ip
.assignment_hint
;
710 memcpy(c
->name
, iface
->name
, namelen
);
712 // First process all custom assignments, put all others in later-list
713 if (c
->assigned
== -1 || !interface_prefix_assign(&prefix
->assignments
, c
)) {
714 if (c
->assigned
!= -1) {
716 netifd_log_message(L_WARNING
, "Failed to assign requested subprefix "
717 "of size %hhu for %s, trying other\n", c
->length
, c
->name
);
719 list_add_tail(&c
->head
, &assign_later
);
723 // Then try to assign all other + failed custom assignments
724 while (!list_empty(&assign_later
)) {
725 c
= list_first_entry(&assign_later
, struct device_prefix_assignment
, head
);
728 bool assigned
= false;
730 assigned
= interface_prefix_assign(&prefix
->assignments
, c
);
731 } while (!assigned
&& ++c
->length
<= 64);
734 netifd_log_message(L_WARNING
, "Failed to assign subprefix "
735 "of size %hhu for %s\n", c
->length
, c
->name
);
740 list_for_each_entry(c
, &prefix
->assignments
, head
)
741 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
742 interface_set_prefix_address(c
, prefix
, iface
, true);
746 void interface_refresh_assignments(bool hint
)
748 static bool refresh
= false;
749 if (!hint
&& refresh
) {
750 struct device_prefix
*p
;
751 list_for_each_entry(p
, &prefixes
, head
)
752 interface_update_prefix_assignments(p
, true);
759 interface_update_prefix(struct vlist_tree
*tree
,
760 struct vlist_node
*node_new
,
761 struct vlist_node
*node_old
)
763 struct device_prefix
*prefix_old
, *prefix_new
;
764 prefix_old
= container_of(node_old
, struct device_prefix
, node
);
765 prefix_new
= container_of(node_new
, struct device_prefix
, node
);
767 struct device_route route
;
768 memset(&route
, 0, sizeof(route
));
769 route
.flags
= DEVADDR_INET6
;
770 route
.metric
= INT32_MAX
;
771 route
.mask
= (node_new
) ? prefix_new
->length
: prefix_old
->length
;
772 route
.addr
.in6
= (node_new
) ? prefix_new
->addr
: prefix_old
->addr
;
775 struct device_prefix_assignment
*c
;
776 struct interface
*iface
;
778 if (node_old
&& node_new
) {
779 // Move assignments and refresh addresses to update valid times
780 list_splice(&prefix_old
->assignments
, &prefix_new
->assignments
);
782 list_for_each_entry(c
, &prefix_new
->assignments
, head
)
783 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
784 interface_set_prefix_address(c
, prefix_new
, iface
, true);
785 } else if (node_new
) {
786 // Set null-route to avoid routing loops and set routing policy
787 system_add_route(NULL
, &route
);
788 if (prefix_new
->iface
)
789 set_ip_source_policy(true, true, IPRULE_PRIORITY_NW
, &route
.addr
,
790 route
.mask
, prefix_new
->iface
);
793 interface_update_prefix_assignments(prefix_new
, true);
794 } else if (node_old
) {
795 interface_update_prefix_assignments(prefix_old
, false);
798 if (prefix_old
->iface
)
799 set_ip_source_policy(false, true, IPRULE_PRIORITY_NW
, &route
.addr
,
800 route
.mask
, prefix_old
->iface
);
801 system_del_route(NULL
, &route
);
805 list_del(&prefix_old
->head
);
810 list_add(&prefix_new
->head
, &prefixes
);
814 struct device_prefix
*
815 interface_ip_add_device_prefix(struct interface
*iface
, struct in6_addr
*addr
,
816 uint8_t length
, time_t valid_until
, time_t preferred_until
,
817 struct in6_addr
*excl_addr
, uint8_t excl_length
)
819 struct device_prefix
*prefix
= calloc(1, sizeof(*prefix
));
820 prefix
->length
= length
;
821 prefix
->addr
= *addr
;
822 prefix
->preferred_until
= preferred_until
;
823 prefix
->valid_until
= valid_until
;
824 prefix
->iface
= iface
;
825 INIT_LIST_HEAD(&prefix
->assignments
);
828 prefix
->excl_addr
= *excl_addr
;
829 prefix
->excl_length
= excl_length
;
833 vlist_add(&iface
->proto_ip
.prefix
, &prefix
->node
, &prefix
->addr
);
835 interface_update_prefix(NULL
, &prefix
->node
, NULL
);
841 interface_ip_set_ula_prefix(const char *prefix
)
843 char buf
[INET6_ADDRSTRLEN
+ 4] = {0}, *saveptr
;
845 strncpy(buf
, prefix
, sizeof(buf
) - 1);
846 char *prefixaddr
= strtok_r(buf
, "/", &saveptr
);
848 struct in6_addr addr
;
849 if (!prefixaddr
|| inet_pton(AF_INET6
, prefixaddr
, &addr
) < 1) {
851 interface_update_prefix(NULL
, NULL
, &ula_prefix
->node
);
858 char *prefixlen
= strtok_r(NULL
, ",", &saveptr
);
859 if (!prefixlen
|| (length
= atoi(prefixlen
)) < 1 || length
> 64)
862 if (!ula_prefix
|| !IN6_ARE_ADDR_EQUAL(&addr
, &ula_prefix
->addr
) ||
863 ula_prefix
->length
!= length
) {
865 interface_update_prefix(NULL
, NULL
, &ula_prefix
->node
);
867 ula_prefix
= interface_ip_add_device_prefix(NULL
, &addr
, length
,
873 interface_add_dns_server(struct interface_ip_settings
*ip
, const char *str
)
875 struct dns_server
*s
;
877 s
= calloc(1, sizeof(*s
));
882 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
886 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
893 D(INTERFACE
, "Add IPv%c DNS server: %s\n",
894 s
->af
== AF_INET6
? '6' : '4', str
);
895 vlist_simple_add(&ip
->dns_servers
, &s
->node
);
899 interface_add_dns_server_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
901 struct blob_attr
*cur
;
904 blobmsg_for_each_attr(cur
, list
, rem
) {
905 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
908 if (!blobmsg_check_attr(cur
, NULL
))
911 interface_add_dns_server(ip
, blobmsg_data(cur
));
916 interface_add_dns_search_domain(struct interface_ip_settings
*ip
, const char *str
)
918 struct dns_search_domain
*s
;
919 int len
= strlen(str
);
921 s
= calloc(1, sizeof(*s
) + len
+ 1);
925 D(INTERFACE
, "Add DNS search domain: %s\n", str
);
926 memcpy(s
->name
, str
, len
);
927 vlist_simple_add(&ip
->dns_search
, &s
->node
);
931 interface_add_dns_search_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
933 struct blob_attr
*cur
;
936 blobmsg_for_each_attr(cur
, list
, rem
) {
937 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
940 if (!blobmsg_check_attr(cur
, NULL
))
943 interface_add_dns_search_domain(ip
, blobmsg_data(cur
));
948 write_resolv_conf_entries(FILE *f
, struct interface_ip_settings
*ip
)
950 struct dns_server
*s
;
951 struct dns_search_domain
*d
;
953 char buf
[INET6_ADDRSTRLEN
];
955 vlist_simple_for_each_element(&ip
->dns_servers
, s
, node
) {
956 str
= inet_ntop(s
->af
, &s
->addr
, buf
, sizeof(buf
));
960 fprintf(f
, "nameserver %s\n", str
);
963 vlist_simple_for_each_element(&ip
->dns_search
, d
, node
) {
964 fprintf(f
, "search %s\n", d
->name
);
969 interface_write_resolv_conf(void)
971 struct interface
*iface
;
972 char *path
= alloca(strlen(resolv_conf
) + 5);
974 uint32_t crcold
, crcnew
;
976 sprintf(path
, "%s.tmp", resolv_conf
);
978 f
= fopen(path
, "w+");
980 D(INTERFACE
, "Failed to open %s for writing\n", path
);
984 vlist_for_each_element(&interfaces
, iface
, node
) {
985 if (iface
->state
!= IFS_UP
)
988 if (vlist_simple_empty(&iface
->proto_ip
.dns_search
) &&
989 vlist_simple_empty(&iface
->proto_ip
.dns_servers
) &&
990 vlist_simple_empty(&iface
->config_ip
.dns_search
) &&
991 vlist_simple_empty(&iface
->config_ip
.dns_servers
))
994 fprintf(f
, "# Interface %s\n", iface
->name
);
995 write_resolv_conf_entries(f
, &iface
->config_ip
);
996 if (!iface
->proto_ip
.no_dns
)
997 write_resolv_conf_entries(f
, &iface
->proto_ip
);
1001 crcnew
= crc32_file(f
);
1004 crcold
= crcnew
+ 1;
1005 f
= fopen(resolv_conf
, "r");
1007 crcold
= crc32_file(f
);
1011 if (crcold
== crcnew
) {
1013 } else if (rename(path
, resolv_conf
) < 0) {
1014 D(INTERFACE
, "Failed to replace %s\n", resolv_conf
);
1019 void interface_ip_set_enabled(struct interface_ip_settings
*ip
, bool enabled
)
1021 struct device_addr
*addr
;
1022 struct device_route
*route
;
1025 ip
->enabled
= enabled
;
1026 dev
= ip
->iface
->l3_dev
.dev
;
1030 vlist_for_each_element(&ip
->addr
, addr
, node
) {
1031 if (addr
->enabled
== enabled
)
1035 system_add_address(dev
, addr
);
1037 system_del_address(dev
, addr
);
1038 addr
->enabled
= enabled
;
1041 vlist_for_each_element(&ip
->route
, route
, node
) {
1042 bool _enabled
= enabled
;
1044 if (!enable_route(ip
, route
))
1047 if (route
->enabled
== _enabled
)
1051 if (!(route
->flags
& DEVROUTE_METRIC
))
1052 route
->metric
= ip
->iface
->metric
;
1054 system_add_route(dev
, route
);
1056 system_del_route(dev
, route
);
1057 route
->enabled
= _enabled
;
1060 struct device_prefix
*c
;
1061 struct device_prefix_assignment
*a
;
1062 list_for_each_entry(c
, &prefixes
, head
)
1063 list_for_each_entry(a
, &c
->assignments
, head
)
1064 if (!strcmp(a
->name
, ip
->iface
->name
))
1065 interface_set_prefix_address(a
, c
, ip
->iface
, enabled
);
1067 set_ip_lo_policy(enabled
, true, ip
->iface
);
1068 set_ip_lo_policy(enabled
, false, ip
->iface
);
1072 interface_ip_update_start(struct interface_ip_settings
*ip
)
1074 if (ip
!= &ip
->iface
->config_ip
) {
1075 vlist_simple_update(&ip
->dns_servers
);
1076 vlist_simple_update(&ip
->dns_search
);
1078 vlist_update(&ip
->route
);
1079 vlist_update(&ip
->addr
);
1080 vlist_update(&ip
->prefix
);
1084 interface_ip_update_complete(struct interface_ip_settings
*ip
)
1086 vlist_simple_flush(&ip
->dns_servers
);
1087 vlist_simple_flush(&ip
->dns_search
);
1088 vlist_flush(&ip
->route
);
1089 vlist_flush(&ip
->addr
);
1090 vlist_flush(&ip
->prefix
);
1091 interface_write_resolv_conf();
1095 interface_ip_flush(struct interface_ip_settings
*ip
)
1097 if (ip
== &ip
->iface
->proto_ip
)
1098 vlist_flush_all(&ip
->iface
->host_routes
);
1099 vlist_simple_flush_all(&ip
->dns_servers
);
1100 vlist_simple_flush_all(&ip
->dns_search
);
1101 vlist_flush_all(&ip
->route
);
1102 vlist_flush_all(&ip
->addr
);
1103 vlist_flush_all(&ip
->prefix
);
1107 __interface_ip_init(struct interface_ip_settings
*ip
, struct interface
*iface
)
1111 vlist_simple_init(&ip
->dns_search
, struct dns_search_domain
, node
);
1112 vlist_simple_init(&ip
->dns_servers
, struct dns_server
, node
);
1113 vlist_init(&ip
->route
, route_cmp
, interface_update_proto_route
);
1114 vlist_init(&ip
->addr
, addr_cmp
, interface_update_proto_addr
);
1115 vlist_init(&ip
->prefix
, prefix_cmp
, interface_update_prefix
);
1119 interface_ip_init(struct interface
*iface
)
1121 __interface_ip_init(&iface
->proto_ip
, iface
);
1122 __interface_ip_init(&iface
->config_ip
, iface
);
1123 vlist_init(&iface
->host_routes
, route_cmp
, interface_update_host_route
);
1128 interface_ip_valid_until_handler(struct uloop_timeout
*t
)
1130 time_t now
= system_get_rtime();
1131 struct interface
*iface
;
1132 vlist_for_each_element(&interfaces
, iface
, node
) {
1133 if (iface
->state
!= IFS_UP
)
1136 struct device_addr
*addr
, *addrp
;
1137 struct device_route
*route
, *routep
;
1138 struct device_prefix
*pref
, *prefp
;
1140 vlist_for_each_element_safe(&iface
->proto_ip
.addr
, addr
, node
, addrp
)
1141 if (addr
->valid_until
&& addr
->valid_until
< now
)
1142 vlist_delete(&iface
->proto_ip
.addr
, &addr
->node
);
1144 vlist_for_each_element_safe(&iface
->proto_ip
.route
, route
, node
, routep
)
1145 if (route
->valid_until
&& route
->valid_until
< now
)
1146 vlist_delete(&iface
->proto_ip
.route
, &route
->node
);
1148 vlist_for_each_element_safe(&iface
->proto_ip
.prefix
, pref
, node
, prefp
)
1149 if (pref
->valid_until
&& pref
->valid_until
< now
)
1150 vlist_delete(&iface
->proto_ip
.prefix
, &pref
->node
);
1154 uloop_timeout_set(t
, 1000);
1158 interface_ip_init_worker(void)
1160 valid_until_timeout
.cb
= interface_ip_valid_until_handler
;
1161 uloop_timeout_set(&valid_until_timeout
, 1000);