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"
43 static const struct blobmsg_policy route_attr
[__ROUTE_MAX
] = {
44 [ROUTE_INTERFACE
] = { .name
= "interface", .type
= BLOBMSG_TYPE_STRING
},
45 [ROUTE_TARGET
] = { .name
= "target", .type
= BLOBMSG_TYPE_STRING
},
46 [ROUTE_MASK
] = { .name
= "netmask", .type
= BLOBMSG_TYPE_STRING
},
47 [ROUTE_GATEWAY
] = { .name
= "gateway", .type
= BLOBMSG_TYPE_STRING
},
48 [ROUTE_METRIC
] = { .name
= "metric", .type
= BLOBMSG_TYPE_INT32
},
49 [ROUTE_MTU
] = { .name
= "mtu", .type
= BLOBMSG_TYPE_INT32
},
50 [ROUTE_TABLE
] = { .name
= "table", .type
= BLOBMSG_TYPE_STRING
},
51 [ROUTE_VALID
] = { .name
= "valid", .type
= BLOBMSG_TYPE_INT32
},
52 [ROUTE_SOURCE
] = { .name
= "source", .type
= BLOBMSG_TYPE_STRING
},
55 const struct uci_blob_param_list route_attr_list
= {
56 .n_params
= __ROUTE_MAX
,
61 struct list_head prefixes
= LIST_HEAD_INIT(prefixes
);
62 static struct device_prefix
*ula_prefix
= NULL
;
63 static struct uloop_timeout valid_until_timeout
;
67 clear_if_addr(union if_addr
*a
, int mask
)
69 int m_bytes
= (mask
+ 7) / 8;
70 uint8_t m_clear
= (1 << (m_bytes
* 8 - mask
)) - 1;
71 uint8_t *p
= (uint8_t *) a
;
73 if (m_bytes
< sizeof(a
))
74 memset(p
+ m_bytes
, 0, sizeof(a
) - m_bytes
);
76 p
[m_bytes
- 1] &= ~m_clear
;
80 match_if_addr(union if_addr
*a1
, union if_addr
*a2
, int mask
)
82 union if_addr
*p1
, *p2
;
84 p1
= alloca(sizeof(*a1
));
85 p2
= alloca(sizeof(*a2
));
87 memcpy(p1
, a1
, sizeof(*a1
));
88 clear_if_addr(p1
, mask
);
89 memcpy(p2
, a2
, sizeof(*a2
));
90 clear_if_addr(p2
, mask
);
92 return !memcmp(p1
, p2
, sizeof(*p1
));
95 static int set_ip_source_policy(bool add
, bool v6
, unsigned int priority
,
96 const union if_addr
*addr
, uint8_t mask
, unsigned int table
,
97 struct interface
*in_iface
, const char *action
)
99 struct iprule rule
= {
100 .flags
= IPRULE_PRIORITY
,
105 rule
.flags
|= IPRULE_SRC
;
106 rule
.src_addr
= *addr
;
107 rule
.src_mask
= mask
;
111 rule
.flags
|= IPRULE_LOOKUP
;
117 rule
.flags
|= IPRULE_ACTION
;
118 system_resolve_iprule_action(action
, &rule
.action
);
121 if (in_iface
&& in_iface
->l3_dev
.dev
) {
122 rule
.flags
|= IPRULE_IN
;
123 strcpy(rule
.in_dev
, in_iface
->l3_dev
.dev
->ifname
);
126 rule
.flags
|= (v6
) ? IPRULE_INET6
: IPRULE_INET4
;
128 return (add
) ? system_add_iprule(&rule
) : system_del_iprule(&rule
);
131 static int set_ip_lo_policy(bool add
, bool v6
, struct interface
*iface
)
133 struct iprule rule
= {
134 .flags
= IPRULE_IN
| IPRULE_LOOKUP
| IPRULE_PRIORITY
,
135 .priority
= IPRULE_PRIORITY_NW
+ iface
->l3_dev
.dev
->ifindex
,
136 .lookup
= (v6
) ? iface
->ip6table
: iface
->ip4table
,
143 rule
.flags
|= (v6
) ? IPRULE_INET6
: IPRULE_INET4
;
145 return (add
) ? system_add_iprule(&rule
) : system_del_iprule(&rule
);
149 __find_ip_addr_target(struct interface_ip_settings
*ip
, union if_addr
*a
, bool v6
)
151 struct device_addr
*addr
;
153 vlist_for_each_element(&ip
->addr
, addr
, node
) {
157 if (v6
!= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
))
160 // Handle offlink addresses correctly
161 unsigned int mask
= addr
->mask
;
162 if ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
&&
163 (addr
->flags
& DEVADDR_OFFLINK
))
166 if (!match_if_addr(&addr
->addr
, a
, mask
))
176 __find_ip_route_target(struct interface_ip_settings
*ip
, union if_addr
*a
,
177 bool v6
, struct device_route
**res
)
179 struct device_route
*route
;
181 vlist_for_each_element(&ip
->route
, route
, node
) {
185 if (v6
!= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
))
188 if (!match_if_addr(&route
->addr
, a
, route
->mask
))
191 if (route
->flags
& DEVROUTE_TABLE
)
194 if (!*res
|| route
->mask
< (*res
)->mask
)
200 interface_ip_find_addr_target(struct interface
*iface
, union if_addr
*a
, bool v6
)
202 return __find_ip_addr_target(&iface
->proto_ip
, a
, v6
) ||
203 __find_ip_addr_target(&iface
->config_ip
, a
, v6
);
207 interface_ip_find_route_target(struct interface
*iface
, union if_addr
*a
,
208 bool v6
, struct device_route
**route
)
210 __find_ip_route_target(&iface
->proto_ip
, a
, v6
, route
);
211 __find_ip_route_target(&iface
->config_ip
, a
, v6
, route
);
215 interface_ip_add_target_route(union if_addr
*addr
, bool v6
, struct interface
*iface
)
217 struct device_route
*route
, *r_next
= NULL
;
218 bool defaultroute_target
= false;
219 int addrsize
= v6
? sizeof(addr
->in6
) : sizeof(addr
->in
);
221 route
= calloc(1, sizeof(*route
));
225 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
226 route
->mask
= v6
? 128 : 32;
227 if (memcmp(&route
->addr
, addr
, addrsize
) == 0)
228 defaultroute_target
= true;
230 memcpy(&route
->addr
, addr
, addrsize
);
233 /* look for locally addressable target first */
234 if (interface_ip_find_addr_target(iface
, addr
, v6
))
237 /* do not stop at the first route, let the lookup compare
238 * masks to find the best match */
239 interface_ip_find_route_target(iface
, addr
, v6
, &r_next
);
241 vlist_for_each_element(&interfaces
, iface
, node
) {
242 /* look for locally addressable target first */
243 if (interface_ip_find_addr_target(iface
, addr
, v6
))
246 /* do not stop at the first route, let the lookup compare
247 * masks to find the best match */
248 interface_ip_find_route_target(iface
, addr
, v6
, &r_next
);
257 iface
= r_next
->iface
;
258 memcpy(&route
->nexthop
, &r_next
->nexthop
, sizeof(route
->nexthop
));
259 route
->mtu
= r_next
->mtu
;
260 route
->metric
= r_next
->metric
;
261 route
->table
= r_next
->table
;
264 route
->iface
= iface
;
265 if (defaultroute_target
)
268 vlist_add(&iface
->host_routes
, &route
->node
, route
);
273 interface_ip_add_route(struct interface
*iface
, struct blob_attr
*attr
, bool v6
)
275 struct interface_ip_settings
*ip
;
276 struct blob_attr
*tb
[__ROUTE_MAX
], *cur
;
277 struct device_route
*route
;
278 int af
= v6
? AF_INET6
: AF_INET
;
279 bool is_proto_route
= !!iface
;
281 blobmsg_parse(route_attr
, __ROUTE_MAX
, tb
, blobmsg_data(attr
), blobmsg_data_len(attr
));
284 if ((cur
= tb
[ROUTE_INTERFACE
]) == NULL
)
287 iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
291 ip
= &iface
->config_ip
;
293 ip
= &iface
->proto_ip
;
296 route
= calloc(1, sizeof(*route
));
300 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
301 route
->mask
= v6
? 128 : 32;
302 if ((cur
= tb
[ROUTE_MASK
]) != NULL
) {
303 route
->mask
= parse_netmask_string(blobmsg_data(cur
), v6
);
304 if (route
->mask
> (v6
? 128 : 32))
308 if ((cur
= tb
[ROUTE_TARGET
]) != NULL
) {
309 if (!parse_ip_and_netmask(af
, blobmsg_data(cur
), &route
->addr
, &route
->mask
)) {
310 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur
));
315 if ((cur
= tb
[ROUTE_GATEWAY
]) != NULL
) {
316 if (!inet_pton(af
, blobmsg_data(cur
), &route
->nexthop
)) {
317 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur
));
322 if ((cur
= tb
[ROUTE_METRIC
]) != NULL
) {
323 route
->metric
= blobmsg_get_u32(cur
);
324 route
->flags
|= DEVROUTE_METRIC
;
327 if ((cur
= tb
[ROUTE_MTU
]) != NULL
) {
328 route
->mtu
= blobmsg_get_u32(cur
);
329 route
->flags
|= DEVROUTE_MTU
;
332 // Use source-based routing
333 if ((cur
= tb
[ROUTE_SOURCE
]) != NULL
) {
334 char *saveptr
, *source
= alloca(blobmsg_data_len(cur
));
335 memcpy(source
, blobmsg_data(cur
), blobmsg_data_len(cur
));
337 const char *addr
= strtok_r(source
, "/", &saveptr
);
338 const char *mask
= strtok_r(NULL
, "/", &saveptr
);
340 if (!addr
|| inet_pton(af
, addr
, &route
->source
) < 1) {
341 DPRINTF("Failed to parse route source: %s\n", addr
);
345 route
->sourcemask
= (mask
) ? atoi(mask
) : ((af
== AF_INET6
) ? 128 : 32);
348 if (is_proto_route
) {
349 route
->table
= (v6
) ? iface
->ip6table
: iface
->ip4table
;
350 route
->flags
|= DEVROUTE_SRCTABLE
;
353 if ((cur
= tb
[ROUTE_TABLE
]) != NULL
) {
354 if (!system_resolve_rt_table(blobmsg_data(cur
), &route
->table
)) {
355 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur
));
360 route
->flags
|= DEVROUTE_TABLE
;
363 if ((cur
= tb
[ROUTE_VALID
]) != NULL
) {
364 int64_t valid
= blobmsg_get_u32(cur
);
365 int64_t valid_until
= valid
+ (int64_t)system_get_rtime();
366 if (valid_until
<= LONG_MAX
&& valid
!= 0xffffffffLL
) // Catch overflow
367 route
->valid_until
= valid_until
;
370 vlist_add(&ip
->route
, &route
->node
, route
);
378 addr_cmp(const void *k1
, const void *k2
, void *ptr
)
380 return memcmp(k1
, k2
, sizeof(struct device_addr
) -
381 offsetof(struct device_addr
, flags
));
385 route_cmp(const void *k1
, const void *k2
, void *ptr
)
387 const struct device_route
*r1
= k1
, *r2
= k2
;
389 if (r1
->mask
!= r2
->mask
)
390 return r2
->mask
- r1
->mask
;
392 if (r1
->metric
!= r2
->metric
)
393 return r1
->metric
- r2
->metric
;
395 if (r1
->flags
!= r2
->flags
)
396 return r2
->flags
- r1
->flags
;
398 if (r1
->sourcemask
!= r2
->sourcemask
)
399 return r1
->sourcemask
- r2
->sourcemask
;
401 int maskcmp
= memcmp(&r1
->source
, &r2
->source
, sizeof(r1
->source
));
405 return memcmp(&r1
->addr
, &r2
->addr
, sizeof(r1
->addr
));
409 prefix_cmp(const void *k1
, const void *k2
, void *ptr
)
411 return memcmp(k1
, k2
, offsetof(struct device_prefix
, pclass
) -
412 offsetof(struct device_prefix
, addr
));
416 interface_handle_subnet_route(struct interface
*iface
, struct device_addr
*addr
, bool add
)
418 struct device
*dev
= iface
->l3_dev
.dev
;
419 struct device_route route
;
421 memset(&route
, 0, sizeof(route
));
423 route
.flags
= addr
->flags
;
424 route
.mask
= addr
->mask
;
425 memcpy(&route
.addr
, &addr
->addr
, sizeof(route
.addr
));
426 clear_if_addr(&route
.addr
, route
.mask
);
429 route
.flags
|= DEVADDR_KERNEL
;
430 system_del_route(dev
, &route
);
432 if (!(addr
->flags
& DEVADDR_OFFLINK
)) {
433 route
.flags
&= ~DEVADDR_KERNEL
;
434 route
.metric
= iface
->metric
;
435 system_add_route(dev
, &route
);
438 if (!(addr
->flags
& DEVADDR_OFFLINK
))
439 system_del_route(dev
, &route
);
444 interface_update_proto_addr(struct vlist_tree
*tree
,
445 struct vlist_node
*node_new
,
446 struct vlist_node
*node_old
)
448 struct interface_ip_settings
*ip
;
449 struct interface
*iface
;
451 struct device_addr
*a_new
= NULL
, *a_old
= NULL
;
452 bool replace
= false;
456 ip
= container_of(tree
, struct interface_ip_settings
, addr
);
458 dev
= iface
->l3_dev
.dev
;
460 if (!node_new
|| !node_old
)
461 iface
->updated
|= IUF_ADDRESS
;
464 a_new
= container_of(node_new
, struct device_addr
, node
);
466 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
470 uint32_t *a
= (uint32_t *) &a_new
->addr
;
472 mask
>>= a_new
->mask
;
473 a_new
->broadcast
= *a
| htonl(mask
);
478 a_old
= container_of(node_old
, struct device_addr
, node
);
480 if (a_new
&& a_old
) {
483 if (a_old
->flags
!= a_new
->flags
)
486 if (a_old
->valid_until
!= a_new
->valid_until
||
487 a_old
->preferred_until
!= a_new
->preferred_until
)
490 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
491 a_new
->broadcast
!= a_old
->broadcast
)
496 if (!(a_old
->flags
& DEVADDR_EXTERNAL
) && a_old
->enabled
&& !keep
) {
497 interface_handle_subnet_route(iface
, a_old
, false);
499 if ((a_old
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
)
502 unsigned int table
= (v6
) ? iface
->ip6table
: iface
->ip4table
;
504 //This is needed for source routing to work correctly. If a device
505 //has two connections to a network using the same subnet, adding
506 //only the network-rule will cause packets to be routed through the
507 //first matching network (source IP matches both masks).
509 set_ip_source_policy(false, v6
, IPRULE_PRIORITY_ADDR
, &a_old
->addr
,
510 (v6
) ? 128 : 32, table
, NULL
, NULL
);
511 set_ip_source_policy(false, v6
, IPRULE_PRIORITY_NW
, &a_old
->addr
,
512 a_old
->mask
, table
, NULL
, NULL
);
515 system_del_address(dev
, a_old
);
522 a_new
->enabled
= true;
523 if (!(a_new
->flags
& DEVADDR_EXTERNAL
) && (!keep
|| replace
)) {
524 system_add_address(dev
, a_new
);
527 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
)
530 unsigned int table
= (v6
) ? iface
->ip6table
: iface
->ip4table
;
533 set_ip_source_policy(true, v6
, IPRULE_PRIORITY_ADDR
, &a_new
->addr
,
534 (v6
) ? 128 : 32, table
, NULL
, NULL
);
535 set_ip_source_policy(true, v6
, IPRULE_PRIORITY_NW
, &a_new
->addr
,
536 a_new
->mask
, table
, NULL
, NULL
);
540 if ((a_new
->flags
& DEVADDR_OFFLINK
) || iface
->metric
)
541 interface_handle_subnet_route(iface
, a_new
, true);
547 enable_route(struct interface_ip_settings
*ip
, struct device_route
*route
)
549 if (ip
->no_defaultroute
&& !route
->mask
)
556 interface_update_proto_route(struct vlist_tree
*tree
,
557 struct vlist_node
*node_new
,
558 struct vlist_node
*node_old
)
560 struct interface_ip_settings
*ip
;
561 struct interface
*iface
;
563 struct device_route
*route_old
, *route_new
;
566 ip
= container_of(tree
, struct interface_ip_settings
, route
);
568 dev
= iface
->l3_dev
.dev
;
570 if (!node_new
|| !node_old
)
571 iface
->updated
|= IUF_ROUTE
;
573 route_old
= container_of(node_old
, struct device_route
, node
);
574 route_new
= container_of(node_new
, struct device_route
, node
);
576 if (node_old
&& node_new
)
577 keep
= !memcmp(&route_old
->nexthop
, &route_new
->nexthop
, sizeof(route_old
->nexthop
)) &&
578 (route_old
->table
== route_new
->table
);
581 if (!(route_old
->flags
& DEVADDR_EXTERNAL
) && route_old
->enabled
&& !keep
)
582 system_del_route(dev
, route_old
);
588 bool _enabled
= enable_route(ip
, route_new
);
590 if (!(route_new
->flags
& DEVROUTE_METRIC
))
591 route_new
->metric
= iface
->metric
;
593 if (!(route_new
->flags
& DEVADDR_EXTERNAL
) && !keep
&& _enabled
)
594 system_add_route(dev
, route_new
);
596 route_new
->iface
= iface
;
597 route_new
->enabled
= _enabled
;
602 interface_update_host_route(struct vlist_tree
*tree
,
603 struct vlist_node
*node_new
,
604 struct vlist_node
*node_old
)
606 struct interface
*iface
;
608 struct device_route
*route_old
, *route_new
;
610 iface
= container_of(tree
, struct interface
, host_routes
);
611 dev
= iface
->l3_dev
.dev
;
613 route_old
= container_of(node_old
, struct device_route
, node
);
614 route_new
= container_of(node_new
, struct device_route
, node
);
617 system_del_route(dev
, route_old
);
622 system_add_route(dev
, route_new
);
627 interface_set_prefix_address(struct device_prefix_assignment
*assignment
,
628 const struct device_prefix
*prefix
, struct interface
*iface
, bool add
)
630 const struct interface
*uplink
= prefix
->iface
;
631 if (!iface
->l3_dev
.dev
)
634 struct device
*l3_downlink
= iface
->l3_dev
.dev
;
636 struct device_addr addr
;
637 memset(&addr
, 0, sizeof(addr
));
638 addr
.addr
.in6
= prefix
->addr
;
639 addr
.addr
.in6
.s6_addr32
[1] |= htonl(assignment
->assigned
);
640 addr
.addr
.in6
.s6_addr
[15] += 1;
641 addr
.mask
= assignment
->length
;
642 addr
.flags
= DEVADDR_INET6
;
643 addr
.preferred_until
= prefix
->preferred_until
;
644 addr
.valid_until
= prefix
->valid_until
;
646 if (!add
&& assignment
->enabled
) {
647 time_t now
= system_get_rtime();
648 addr
.preferred_until
= now
;
649 if (!addr
.valid_until
|| addr
.valid_until
- now
> 7200)
650 addr
.valid_until
= now
+ 7200;
651 system_del_address(l3_downlink
, &addr
); // Work around dangling prefix routes
652 system_add_address(l3_downlink
, &addr
);
654 if (prefix
->iface
->ip6table
)
655 set_ip_source_policy(false, true, IPRULE_PRIORITY_NW
, &addr
.addr
,
656 addr
.mask
, prefix
->iface
->ip6table
, iface
, NULL
);
658 set_ip_source_policy(false, true, IPRULE_PRIORITY_REJECT
, &addr
.addr
,
659 addr
.mask
, 0, iface
, "unreachable");
662 assignment
->enabled
= false;
663 } else if (add
&& (iface
->state
== IFS_UP
|| iface
->state
== IFS_SETUP
)) {
664 system_add_address(l3_downlink
, &addr
);
665 if (prefix
->iface
&& !assignment
->enabled
) {
666 set_ip_source_policy(true, true, IPRULE_PRIORITY_REJECT
, &addr
.addr
,
667 addr
.mask
, 0, iface
, "unreachable");
669 if (prefix
->iface
->ip6table
)
670 set_ip_source_policy(true, true, IPRULE_PRIORITY_NW
, &addr
.addr
,
671 addr
.mask
, prefix
->iface
->ip6table
, iface
, NULL
);
673 if (uplink
&& uplink
->l3_dev
.dev
) {
674 int mtu
= system_update_ipv6_mtu(
675 uplink
->l3_dev
.dev
, 0);
677 system_update_ipv6_mtu(l3_downlink
, mtu
);
679 assignment
->enabled
= true;
683 static bool interface_prefix_assign(struct list_head
*list
,
684 struct device_prefix_assignment
*assign
)
686 int32_t current
= 0, asize
= (1 << (64 - assign
->length
)) - 1;
687 struct device_prefix_assignment
*c
;
688 list_for_each_entry(c
, list
, head
) {
689 if (assign
->assigned
!= -1) {
690 if (assign
->assigned
>= current
&& assign
->assigned
+ asize
< c
->assigned
) {
691 list_add_tail(&assign
->head
, &c
->head
);
694 } else if (assign
->assigned
== -1) {
695 current
= (current
+ asize
) & (~asize
);
696 if (current
+ asize
< c
->assigned
) {
697 assign
->assigned
= current
;
698 list_add_tail(&assign
->head
, &c
->head
);
702 current
= (c
->assigned
+ (1 << (64 - c
->length
)));
707 static void interface_update_prefix_assignments(struct device_prefix
*prefix
, bool setup
)
709 struct device_prefix_assignment
*c
;
710 struct interface
*iface
;
712 // Delete all assignments
713 while (!list_empty(&prefix
->assignments
)) {
714 c
= list_first_entry(&prefix
->assignments
,
715 struct device_prefix_assignment
, head
);
716 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
717 interface_set_prefix_address(c
, prefix
, iface
, false);
725 // End-of-assignment sentinel
726 c
= malloc(sizeof(*c
) + 1);
727 c
->assigned
= 1 << (64 - prefix
->length
);
730 list_add(&c
->head
, &prefix
->assignments
);
733 if (prefix
->excl_length
> 0) {
734 const char name
[] = "!excluded";
735 c
= malloc(sizeof(*c
) + sizeof(name
));
736 c
->assigned
= ntohl(prefix
->excl_addr
.s6_addr32
[1]) &
737 ((1 << (64 - prefix
->length
)) - 1);
738 c
->length
= prefix
->excl_length
;
739 memcpy(c
->name
, name
, sizeof(name
));
740 list_add(&c
->head
, &prefix
->assignments
);
743 bool assigned_any
= false;
744 struct list_head assign_later
= LIST_HEAD_INIT(assign_later
);
745 vlist_for_each_element(&interfaces
, iface
, node
) {
746 if (iface
->assignment_length
< 48 ||
747 iface
->assignment_length
> 64)
750 // Test whether there is a matching class
751 if (!list_empty(&iface
->assignment_classes
)) {
754 struct interface_assignment_class
*c
;
755 list_for_each_entry(c
, &iface
->assignment_classes
, head
) {
756 if (!strcmp(c
->name
, prefix
->pclass
)) {
766 size_t namelen
= strlen(iface
->name
) + 1;
767 c
= malloc(sizeof(*c
) + namelen
);
768 c
->length
= iface
->assignment_length
;
769 c
->assigned
= iface
->assignment_hint
;
771 memcpy(c
->name
, iface
->name
, namelen
);
773 // First process all custom assignments, put all others in later-list
774 if (c
->assigned
== -1 || !interface_prefix_assign(&prefix
->assignments
, c
)) {
775 if (c
->assigned
!= -1) {
777 netifd_log_message(L_WARNING
, "Failed to assign requested subprefix "
778 "of size %hhu for %s, trying other\n", c
->length
, c
->name
);
781 struct list_head
*next
= &assign_later
;
782 struct device_prefix_assignment
*n
;
783 list_for_each_entry(n
, &assign_later
, head
) {
784 if (n
->length
< c
->length
) {
789 list_add_tail(&c
->head
, next
);
792 if (c
->assigned
!= -1)
796 // Then try to assign all other + failed custom assignments
797 while (!list_empty(&assign_later
)) {
798 c
= list_first_entry(&assign_later
, struct device_prefix_assignment
, head
);
801 bool assigned
= false;
803 assigned
= interface_prefix_assign(&prefix
->assignments
, c
);
804 } while (!assigned
&& ++c
->length
<= 64);
807 netifd_log_message(L_WARNING
, "Failed to assign subprefix "
808 "of size %hhu for %s\n", c
->length
, c
->name
);
815 list_for_each_entry(c
, &prefix
->assignments
, head
)
816 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
817 interface_set_prefix_address(c
, prefix
, iface
, true);
820 netifd_log_message(L_WARNING
, "You have delegated IPv6-prefixes but haven't assigned them "
821 "to any interface. Did you forget to set option ip6assign on your lan-interfaces?");
825 void interface_refresh_assignments(bool hint
)
827 static bool refresh
= false;
828 if (!hint
&& refresh
) {
829 struct device_prefix
*p
;
830 list_for_each_entry(p
, &prefixes
, head
)
831 interface_update_prefix_assignments(p
, true);
838 interface_update_prefix(struct vlist_tree
*tree
,
839 struct vlist_node
*node_new
,
840 struct vlist_node
*node_old
)
842 struct device_prefix
*prefix_old
, *prefix_new
;
843 prefix_old
= container_of(node_old
, struct device_prefix
, node
);
844 prefix_new
= container_of(node_new
, struct device_prefix
, node
);
846 struct interface_ip_settings
*ip
= container_of(tree
, struct interface_ip_settings
, prefix
);
847 if (tree
&& (!node_new
|| !node_old
))
848 ip
->iface
->updated
|= IUF_PREFIX
;
850 struct device_route route
;
851 memset(&route
, 0, sizeof(route
));
852 route
.flags
= DEVADDR_INET6
;
853 route
.metric
= INT32_MAX
;
854 route
.mask
= (node_new
) ? prefix_new
->length
: prefix_old
->length
;
855 route
.addr
.in6
= (node_new
) ? prefix_new
->addr
: prefix_old
->addr
;
858 struct device_prefix_assignment
*c
;
859 struct interface
*iface
;
861 if (node_old
&& node_new
) {
862 // Move assignments and refresh addresses to update valid times
863 list_splice(&prefix_old
->assignments
, &prefix_new
->assignments
);
865 list_for_each_entry(c
, &prefix_new
->assignments
, head
)
866 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
867 interface_set_prefix_address(c
, prefix_new
, iface
, true);
868 } else if (node_new
) {
869 // Set null-route to avoid routing loops
870 system_add_route(NULL
, &route
);
872 if (!prefix_new
->iface
|| !prefix_new
->iface
->proto_ip
.no_delegation
)
873 interface_update_prefix_assignments(prefix_new
, true);
874 } else if (node_old
) {
876 interface_update_prefix_assignments(prefix_old
, false);
877 system_del_route(NULL
, &route
);
881 if (prefix_old
->head
.next
)
882 list_del(&prefix_old
->head
);
886 if (node_new
&& (!prefix_new
->iface
|| !prefix_new
->iface
->proto_ip
.no_delegation
))
887 list_add(&prefix_new
->head
, &prefixes
);
891 struct device_prefix
*
892 interface_ip_add_device_prefix(struct interface
*iface
, struct in6_addr
*addr
,
893 uint8_t length
, time_t valid_until
, time_t preferred_until
,
894 struct in6_addr
*excl_addr
, uint8_t excl_length
, const char *pclass
)
897 pclass
= (iface
) ? iface
->name
: "local";
899 struct device_prefix
*prefix
= calloc(1, sizeof(*prefix
) + strlen(pclass
) + 1);
900 prefix
->length
= length
;
901 prefix
->addr
= *addr
;
902 prefix
->preferred_until
= preferred_until
;
903 prefix
->valid_until
= valid_until
;
904 prefix
->iface
= iface
;
905 INIT_LIST_HEAD(&prefix
->assignments
);
908 prefix
->excl_addr
= *excl_addr
;
909 prefix
->excl_length
= excl_length
;
912 strcpy(prefix
->pclass
, pclass
);
915 vlist_add(&iface
->proto_ip
.prefix
, &prefix
->node
, &prefix
->addr
);
917 interface_update_prefix(NULL
, &prefix
->node
, NULL
);
923 interface_ip_set_ula_prefix(const char *prefix
)
925 char buf
[INET6_ADDRSTRLEN
+ 4] = {0}, *saveptr
;
927 strncpy(buf
, prefix
, sizeof(buf
) - 1);
928 char *prefixaddr
= strtok_r(buf
, "/", &saveptr
);
930 struct in6_addr addr
;
931 if (!prefixaddr
|| inet_pton(AF_INET6
, prefixaddr
, &addr
) < 1) {
933 interface_update_prefix(NULL
, NULL
, &ula_prefix
->node
);
940 char *prefixlen
= strtok_r(NULL
, ",", &saveptr
);
941 if (!prefixlen
|| (length
= atoi(prefixlen
)) < 1 || length
> 64)
944 if (!ula_prefix
|| !IN6_ARE_ADDR_EQUAL(&addr
, &ula_prefix
->addr
) ||
945 ula_prefix
->length
!= length
) {
947 interface_update_prefix(NULL
, NULL
, &ula_prefix
->node
);
949 ula_prefix
= interface_ip_add_device_prefix(NULL
, &addr
, length
,
950 0, 0, NULL
, 0, NULL
);
955 interface_add_dns_server(struct interface_ip_settings
*ip
, const char *str
)
957 struct dns_server
*s
;
959 s
= calloc(1, sizeof(*s
));
964 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
968 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
975 D(INTERFACE
, "Add IPv%c DNS server: %s\n",
976 s
->af
== AF_INET6
? '6' : '4', str
);
977 vlist_simple_add(&ip
->dns_servers
, &s
->node
);
981 interface_add_dns_server_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
983 struct blob_attr
*cur
;
986 blobmsg_for_each_attr(cur
, list
, rem
) {
987 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
990 if (!blobmsg_check_attr(cur
, NULL
))
993 interface_add_dns_server(ip
, blobmsg_data(cur
));
998 interface_add_dns_search_domain(struct interface_ip_settings
*ip
, const char *str
)
1000 struct dns_search_domain
*s
;
1001 int len
= strlen(str
);
1003 s
= calloc(1, sizeof(*s
) + len
+ 1);
1007 D(INTERFACE
, "Add DNS search domain: %s\n", str
);
1008 memcpy(s
->name
, str
, len
);
1009 vlist_simple_add(&ip
->dns_search
, &s
->node
);
1013 interface_add_dns_search_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
1015 struct blob_attr
*cur
;
1018 blobmsg_for_each_attr(cur
, list
, rem
) {
1019 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
1022 if (!blobmsg_check_attr(cur
, NULL
))
1025 interface_add_dns_search_domain(ip
, blobmsg_data(cur
));
1030 write_resolv_conf_entries(FILE *f
, struct interface_ip_settings
*ip
)
1032 struct dns_server
*s
;
1033 struct dns_search_domain
*d
;
1035 char buf
[INET6_ADDRSTRLEN
];
1037 vlist_simple_for_each_element(&ip
->dns_servers
, s
, node
) {
1038 str
= inet_ntop(s
->af
, &s
->addr
, buf
, sizeof(buf
));
1042 fprintf(f
, "nameserver %s\n", str
);
1045 vlist_simple_for_each_element(&ip
->dns_search
, d
, node
) {
1046 fprintf(f
, "search %s\n", d
->name
);
1051 interface_write_resolv_conf(void)
1053 struct interface
*iface
;
1054 char *path
= alloca(strlen(resolv_conf
) + 5);
1056 uint32_t crcold
, crcnew
;
1058 sprintf(path
, "%s.tmp", resolv_conf
);
1060 f
= fopen(path
, "w+");
1062 D(INTERFACE
, "Failed to open %s for writing\n", path
);
1066 vlist_for_each_element(&interfaces
, iface
, node
) {
1067 if (iface
->state
!= IFS_UP
)
1070 if (vlist_simple_empty(&iface
->proto_ip
.dns_search
) &&
1071 vlist_simple_empty(&iface
->proto_ip
.dns_servers
) &&
1072 vlist_simple_empty(&iface
->config_ip
.dns_search
) &&
1073 vlist_simple_empty(&iface
->config_ip
.dns_servers
))
1076 fprintf(f
, "# Interface %s\n", iface
->name
);
1077 write_resolv_conf_entries(f
, &iface
->config_ip
);
1078 if (!iface
->proto_ip
.no_dns
)
1079 write_resolv_conf_entries(f
, &iface
->proto_ip
);
1083 crcnew
= crc32_file(f
);
1086 crcold
= crcnew
+ 1;
1087 f
= fopen(resolv_conf
, "r");
1089 crcold
= crc32_file(f
);
1093 if (crcold
== crcnew
) {
1095 } else if (rename(path
, resolv_conf
) < 0) {
1096 D(INTERFACE
, "Failed to replace %s\n", resolv_conf
);
1101 void interface_ip_set_enabled(struct interface_ip_settings
*ip
, bool enabled
)
1103 struct device_addr
*addr
;
1104 struct device_route
*route
;
1107 ip
->enabled
= enabled
;
1108 dev
= ip
->iface
->l3_dev
.dev
;
1112 vlist_for_each_element(&ip
->addr
, addr
, node
) {
1113 if (addr
->enabled
== enabled
)
1117 system_add_address(dev
, addr
);
1119 system_del_address(dev
, addr
);
1120 addr
->enabled
= enabled
;
1123 vlist_for_each_element(&ip
->route
, route
, node
) {
1124 bool _enabled
= enabled
;
1126 if (!enable_route(ip
, route
))
1129 if (route
->enabled
== _enabled
)
1133 if (!(route
->flags
& DEVROUTE_METRIC
))
1134 route
->metric
= ip
->iface
->metric
;
1136 system_add_route(dev
, route
);
1138 system_del_route(dev
, route
);
1139 route
->enabled
= _enabled
;
1142 struct device_prefix
*c
;
1143 struct device_prefix_assignment
*a
;
1144 list_for_each_entry(c
, &prefixes
, head
)
1145 list_for_each_entry(a
, &c
->assignments
, head
)
1146 if (!strcmp(a
->name
, ip
->iface
->name
))
1147 interface_set_prefix_address(a
, c
, ip
->iface
, enabled
);
1149 if (ip
->iface
&& ip
->iface
->l3_dev
.dev
) {
1150 set_ip_lo_policy(enabled
, true, ip
->iface
);
1151 set_ip_lo_policy(enabled
, false, ip
->iface
);
1153 set_ip_source_policy(enabled
, true, IPRULE_PRIORITY_REJECT
+ ip
->iface
->l3_dev
.dev
->ifindex
,
1154 NULL
, 0, 0, ip
->iface
, "failed_policy");
1159 interface_ip_update_start(struct interface_ip_settings
*ip
)
1161 if (ip
!= &ip
->iface
->config_ip
) {
1162 vlist_simple_update(&ip
->dns_servers
);
1163 vlist_simple_update(&ip
->dns_search
);
1165 vlist_update(&ip
->route
);
1166 vlist_update(&ip
->addr
);
1167 vlist_update(&ip
->prefix
);
1171 interface_ip_update_complete(struct interface_ip_settings
*ip
)
1173 vlist_simple_flush(&ip
->dns_servers
);
1174 vlist_simple_flush(&ip
->dns_search
);
1175 vlist_flush(&ip
->route
);
1176 vlist_flush(&ip
->addr
);
1177 vlist_flush(&ip
->prefix
);
1178 interface_write_resolv_conf();
1182 interface_ip_flush(struct interface_ip_settings
*ip
)
1184 if (ip
== &ip
->iface
->proto_ip
)
1185 vlist_flush_all(&ip
->iface
->host_routes
);
1186 vlist_simple_flush_all(&ip
->dns_servers
);
1187 vlist_simple_flush_all(&ip
->dns_search
);
1188 vlist_flush_all(&ip
->route
);
1189 vlist_flush_all(&ip
->addr
);
1190 vlist_flush_all(&ip
->prefix
);
1194 __interface_ip_init(struct interface_ip_settings
*ip
, struct interface
*iface
)
1198 vlist_simple_init(&ip
->dns_search
, struct dns_search_domain
, node
);
1199 vlist_simple_init(&ip
->dns_servers
, struct dns_server
, node
);
1200 vlist_init(&ip
->route
, route_cmp
, interface_update_proto_route
);
1201 vlist_init(&ip
->addr
, addr_cmp
, interface_update_proto_addr
);
1202 vlist_init(&ip
->prefix
, prefix_cmp
, interface_update_prefix
);
1206 interface_ip_init(struct interface
*iface
)
1208 __interface_ip_init(&iface
->proto_ip
, iface
);
1209 __interface_ip_init(&iface
->config_ip
, iface
);
1210 vlist_init(&iface
->host_routes
, route_cmp
, interface_update_host_route
);
1215 interface_ip_valid_until_handler(struct uloop_timeout
*t
)
1217 time_t now
= system_get_rtime();
1218 struct interface
*iface
;
1219 vlist_for_each_element(&interfaces
, iface
, node
) {
1220 if (iface
->state
!= IFS_UP
)
1223 struct device_addr
*addr
, *addrp
;
1224 struct device_route
*route
, *routep
;
1225 struct device_prefix
*pref
, *prefp
;
1227 vlist_for_each_element_safe(&iface
->proto_ip
.addr
, addr
, node
, addrp
)
1228 if (addr
->valid_until
&& addr
->valid_until
< now
)
1229 vlist_delete(&iface
->proto_ip
.addr
, &addr
->node
);
1231 vlist_for_each_element_safe(&iface
->proto_ip
.route
, route
, node
, routep
)
1232 if (route
->valid_until
&& route
->valid_until
< now
)
1233 vlist_delete(&iface
->proto_ip
.route
, &route
->node
);
1235 vlist_for_each_element_safe(&iface
->proto_ip
.prefix
, pref
, node
, prefp
)
1236 if (pref
->valid_until
&& pref
->valid_until
< now
)
1237 vlist_delete(&iface
->proto_ip
.prefix
, &pref
->node
);
1241 uloop_timeout_set(t
, 1000);
1245 interface_ip_init_worker(void)
1247 valid_until_timeout
.cb
= interface_ip_valid_until_handler
;
1248 uloop_timeout_set(&valid_until_timeout
, 1000);