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>
21 #include <netinet/in.h>
25 #include "interface.h"
26 #include "interface-ip.h"
44 static const struct blobmsg_policy route_attr
[__ROUTE_MAX
] = {
45 [ROUTE_INTERFACE
] = { .name
= "interface", .type
= BLOBMSG_TYPE_STRING
},
46 [ROUTE_TARGET
] = { .name
= "target", .type
= BLOBMSG_TYPE_STRING
},
47 [ROUTE_MASK
] = { .name
= "netmask", .type
= BLOBMSG_TYPE_STRING
},
48 [ROUTE_GATEWAY
] = { .name
= "gateway", .type
= BLOBMSG_TYPE_STRING
},
49 [ROUTE_METRIC
] = { .name
= "metric", .type
= BLOBMSG_TYPE_INT32
},
50 [ROUTE_MTU
] = { .name
= "mtu", .type
= BLOBMSG_TYPE_INT32
},
51 [ROUTE_TABLE
] = { .name
= "table", .type
= BLOBMSG_TYPE_STRING
},
52 [ROUTE_VALID
] = { .name
= "valid", .type
= BLOBMSG_TYPE_INT32
},
53 [ROUTE_SOURCE
] = { .name
= "source", .type
= BLOBMSG_TYPE_STRING
},
56 const struct uci_blob_param_list route_attr_list
= {
57 .n_params
= __ROUTE_MAX
,
62 struct list_head prefixes
= LIST_HEAD_INIT(prefixes
);
63 static struct device_prefix
*ula_prefix
= NULL
;
64 static struct uloop_timeout valid_until_timeout
;
68 clear_if_addr(union if_addr
*a
, int mask
)
70 int m_bytes
= (mask
+ 7) / 8;
71 uint8_t m_clear
= (1 << (m_bytes
* 8 - mask
)) - 1;
72 uint8_t *p
= (uint8_t *) a
;
74 if (m_bytes
< sizeof(a
))
75 memset(p
+ m_bytes
, 0, sizeof(a
) - m_bytes
);
77 p
[m_bytes
- 1] &= ~m_clear
;
81 match_if_addr(union if_addr
*a1
, union if_addr
*a2
, int mask
)
83 union if_addr
*p1
, *p2
;
85 p1
= alloca(sizeof(*a1
));
86 p2
= alloca(sizeof(*a2
));
88 memcpy(p1
, a1
, sizeof(*a1
));
89 clear_if_addr(p1
, mask
);
90 memcpy(p2
, a2
, sizeof(*a2
));
91 clear_if_addr(p2
, mask
);
93 return !memcmp(p1
, p2
, sizeof(*p1
));
96 static int set_ip_source_policy(bool add
, bool v6
, unsigned int priority
,
97 const union if_addr
*addr
, uint8_t mask
, unsigned int table
,
98 struct interface
*in_iface
, const char *action
)
100 struct iprule rule
= {
101 .flags
= IPRULE_PRIORITY
,
106 rule
.flags
|= IPRULE_SRC
;
107 rule
.src_addr
= *addr
;
108 rule
.src_mask
= mask
;
112 rule
.flags
|= IPRULE_LOOKUP
;
118 rule
.flags
|= IPRULE_ACTION
;
119 system_resolve_iprule_action(action
, &rule
.action
);
122 if (in_iface
&& in_iface
->l3_dev
.dev
) {
123 rule
.flags
|= IPRULE_IN
;
124 strcpy(rule
.in_dev
, in_iface
->l3_dev
.dev
->ifname
);
127 rule
.flags
|= (v6
) ? IPRULE_INET6
: IPRULE_INET4
;
129 return (add
) ? system_add_iprule(&rule
) : system_del_iprule(&rule
);
132 static int set_ip_lo_policy(bool add
, bool v6
, struct interface
*iface
)
134 struct iprule rule
= {
135 .flags
= IPRULE_IN
| IPRULE_LOOKUP
| IPRULE_PRIORITY
,
136 .priority
= IPRULE_PRIORITY_NW
+ iface
->l3_dev
.dev
->ifindex
,
137 .lookup
= (v6
) ? iface
->ip6table
: iface
->ip4table
,
144 rule
.flags
|= (v6
) ? IPRULE_INET6
: IPRULE_INET4
;
146 return (add
) ? system_add_iprule(&rule
) : system_del_iprule(&rule
);
150 __find_ip_addr_target(struct interface_ip_settings
*ip
, union if_addr
*a
, bool v6
)
152 struct device_addr
*addr
;
154 vlist_for_each_element(&ip
->addr
, addr
, node
) {
158 if (v6
!= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
))
161 // Handle offlink addresses correctly
162 unsigned int mask
= addr
->mask
;
163 if ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
&&
164 (addr
->flags
& DEVADDR_OFFLINK
))
167 if (!match_if_addr(&addr
->addr
, a
, mask
))
177 __find_ip_route_target(struct interface_ip_settings
*ip
, union if_addr
*a
,
178 bool v6
, struct device_route
**res
)
180 struct device_route
*route
;
182 vlist_for_each_element(&ip
->route
, route
, node
) {
186 if (v6
!= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
))
189 if (!match_if_addr(&route
->addr
, a
, route
->mask
))
192 if (route
->flags
& DEVROUTE_TABLE
)
195 if (!*res
|| route
->mask
< (*res
)->mask
)
201 interface_ip_find_addr_target(struct interface
*iface
, union if_addr
*a
, bool v6
)
203 return __find_ip_addr_target(&iface
->proto_ip
, a
, v6
) ||
204 __find_ip_addr_target(&iface
->config_ip
, a
, v6
);
208 interface_ip_find_route_target(struct interface
*iface
, union if_addr
*a
,
209 bool v6
, struct device_route
**route
)
211 __find_ip_route_target(&iface
->proto_ip
, a
, v6
, route
);
212 __find_ip_route_target(&iface
->config_ip
, a
, v6
, route
);
216 interface_ip_add_target_route(union if_addr
*addr
, bool v6
, struct interface
*iface
)
218 struct device_route
*route
, *r_next
= NULL
;
219 bool defaultroute_target
= false;
220 int addrsize
= v6
? sizeof(addr
->in6
) : sizeof(addr
->in
);
222 route
= calloc(1, sizeof(*route
));
226 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
227 route
->mask
= v6
? 128 : 32;
228 if (memcmp(&route
->addr
, addr
, addrsize
) == 0)
229 defaultroute_target
= true;
231 memcpy(&route
->addr
, addr
, addrsize
);
234 /* look for locally addressable target first */
235 if (interface_ip_find_addr_target(iface
, addr
, v6
))
238 /* do not stop at the first route, let the lookup compare
239 * masks to find the best match */
240 interface_ip_find_route_target(iface
, addr
, v6
, &r_next
);
242 vlist_for_each_element(&interfaces
, iface
, node
) {
243 /* look for locally addressable target first */
244 if (interface_ip_find_addr_target(iface
, addr
, v6
))
247 /* do not stop at the first route, let the lookup compare
248 * masks to find the best match */
249 interface_ip_find_route_target(iface
, addr
, v6
, &r_next
);
258 iface
= r_next
->iface
;
259 memcpy(&route
->nexthop
, &r_next
->nexthop
, sizeof(route
->nexthop
));
260 route
->mtu
= r_next
->mtu
;
261 route
->metric
= r_next
->metric
;
262 route
->table
= r_next
->table
;
265 route
->iface
= iface
;
266 if (defaultroute_target
)
269 vlist_add(&iface
->host_routes
, &route
->node
, route
);
274 interface_ip_add_route(struct interface
*iface
, struct blob_attr
*attr
, bool v6
)
276 struct interface_ip_settings
*ip
;
277 struct blob_attr
*tb
[__ROUTE_MAX
], *cur
;
278 struct device_route
*route
;
279 int af
= v6
? AF_INET6
: AF_INET
;
280 bool is_proto_route
= !!iface
;
282 blobmsg_parse(route_attr
, __ROUTE_MAX
, tb
, blobmsg_data(attr
), blobmsg_data_len(attr
));
285 if ((cur
= tb
[ROUTE_INTERFACE
]) == NULL
)
288 iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
292 ip
= &iface
->config_ip
;
294 ip
= &iface
->proto_ip
;
297 route
= calloc(1, sizeof(*route
));
301 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
302 route
->mask
= v6
? 128 : 32;
303 if ((cur
= tb
[ROUTE_MASK
]) != NULL
) {
304 route
->mask
= parse_netmask_string(blobmsg_data(cur
), v6
);
305 if (route
->mask
> (v6
? 128 : 32))
309 if ((cur
= tb
[ROUTE_TARGET
]) != NULL
) {
310 if (!parse_ip_and_netmask(af
, blobmsg_data(cur
), &route
->addr
, &route
->mask
)) {
311 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur
));
316 if ((cur
= tb
[ROUTE_GATEWAY
]) != NULL
) {
317 if (!inet_pton(af
, blobmsg_data(cur
), &route
->nexthop
)) {
318 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur
));
323 if ((cur
= tb
[ROUTE_METRIC
]) != NULL
) {
324 route
->metric
= blobmsg_get_u32(cur
);
325 route
->flags
|= DEVROUTE_METRIC
;
327 route
->metric
= iface
->metric
;
329 if ((cur
= tb
[ROUTE_MTU
]) != NULL
) {
330 route
->mtu
= blobmsg_get_u32(cur
);
331 route
->flags
|= DEVROUTE_MTU
;
334 // Use source-based routing
335 if ((cur
= tb
[ROUTE_SOURCE
]) != NULL
) {
336 char *saveptr
, *source
= alloca(blobmsg_data_len(cur
));
337 memcpy(source
, blobmsg_data(cur
), blobmsg_data_len(cur
));
339 const char *addr
= strtok_r(source
, "/", &saveptr
);
340 const char *mask
= strtok_r(NULL
, "/", &saveptr
);
342 if (!addr
|| inet_pton(af
, addr
, &route
->source
) < 1) {
343 DPRINTF("Failed to parse route source: %s\n", addr
);
347 route
->sourcemask
= (mask
) ? atoi(mask
) : ((af
== AF_INET6
) ? 128 : 32);
350 if (is_proto_route
) {
351 route
->table
= (v6
) ? iface
->ip6table
: iface
->ip4table
;
352 route
->flags
|= DEVROUTE_SRCTABLE
;
355 if ((cur
= tb
[ROUTE_TABLE
]) != NULL
) {
356 if (!system_resolve_rt_table(blobmsg_data(cur
), &route
->table
)) {
357 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur
));
362 route
->flags
|= DEVROUTE_TABLE
;
365 if ((cur
= tb
[ROUTE_VALID
]) != NULL
) {
366 int64_t valid
= blobmsg_get_u32(cur
);
367 int64_t valid_until
= valid
+ (int64_t)system_get_rtime();
368 if (valid_until
<= LONG_MAX
&& valid
!= 0xffffffffLL
) // Catch overflow
369 route
->valid_until
= valid_until
;
372 vlist_add(&ip
->route
, &route
->node
, route
);
380 addr_cmp(const void *k1
, const void *k2
, void *ptr
)
382 return memcmp(k1
, k2
, sizeof(struct device_addr
) -
383 offsetof(struct device_addr
, flags
));
387 route_cmp(const void *k1
, const void *k2
, void *ptr
)
389 const struct device_route
*r1
= k1
, *r2
= k2
;
391 if (r1
->mask
!= r2
->mask
)
392 return r2
->mask
- r1
->mask
;
394 if (r1
->metric
!= r2
->metric
)
395 return r1
->metric
- r2
->metric
;
397 if (r1
->flags
!= r2
->flags
)
398 return r2
->flags
- r1
->flags
;
400 if (r1
->sourcemask
!= r2
->sourcemask
)
401 return r1
->sourcemask
- r2
->sourcemask
;
403 if (r1
->table
!= r2
->table
)
404 return r1
->table
- r2
->table
;
406 int maskcmp
= memcmp(&r1
->source
, &r2
->source
, sizeof(r1
->source
));
410 return memcmp(&r1
->addr
, &r2
->addr
, sizeof(r1
->addr
));
414 prefix_cmp(const void *k1
, const void *k2
, void *ptr
)
416 return memcmp(k1
, k2
, offsetof(struct device_prefix
, pclass
) -
417 offsetof(struct device_prefix
, addr
));
421 interface_handle_subnet_route(struct interface
*iface
, struct device_addr
*addr
, bool add
)
423 struct device
*dev
= iface
->l3_dev
.dev
;
424 struct device_route route
;
426 memset(&route
, 0, sizeof(route
));
428 route
.flags
= addr
->flags
;
429 route
.mask
= addr
->mask
;
430 memcpy(&route
.addr
, &addr
->addr
, sizeof(route
.addr
));
431 clear_if_addr(&route
.addr
, route
.mask
);
434 route
.flags
|= DEVADDR_KERNEL
;
435 system_del_route(dev
, &route
);
437 if (!(addr
->flags
& DEVADDR_OFFLINK
)) {
438 route
.flags
&= ~DEVADDR_KERNEL
;
439 route
.metric
= iface
->metric
;
440 system_add_route(dev
, &route
);
443 if (!(addr
->flags
& DEVADDR_OFFLINK
))
444 system_del_route(dev
, &route
);
449 interface_update_proto_addr(struct vlist_tree
*tree
,
450 struct vlist_node
*node_new
,
451 struct vlist_node
*node_old
)
453 struct interface_ip_settings
*ip
;
454 struct interface
*iface
;
456 struct device_addr
*a_new
= NULL
, *a_old
= NULL
;
457 bool replace
= false;
461 ip
= container_of(tree
, struct interface_ip_settings
, addr
);
463 dev
= iface
->l3_dev
.dev
;
465 if (!node_new
|| !node_old
)
466 iface
->updated
|= IUF_ADDRESS
;
469 a_new
= container_of(node_new
, struct device_addr
, node
);
471 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
475 uint32_t *a
= (uint32_t *) &a_new
->addr
;
477 mask
>>= a_new
->mask
;
478 a_new
->broadcast
= *a
| htonl(mask
);
483 a_old
= container_of(node_old
, struct device_addr
, node
);
485 if (a_new
&& a_old
) {
488 if (a_old
->flags
!= a_new
->flags
|| a_old
->failed
)
491 if (a_old
->valid_until
!= a_new
->valid_until
||
492 a_old
->preferred_until
!= a_new
->preferred_until
)
495 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
496 a_new
->broadcast
!= a_old
->broadcast
)
501 if (!(a_old
->flags
& DEVADDR_EXTERNAL
) && a_old
->enabled
&& !keep
) {
502 interface_handle_subnet_route(iface
, a_old
, false);
504 if ((a_old
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
)
507 unsigned int table
= (v6
) ? iface
->ip6table
: iface
->ip4table
;
509 //This is needed for source routing to work correctly. If a device
510 //has two connections to a network using the same subnet, adding
511 //only the network-rule will cause packets to be routed through the
512 //first matching network (source IP matches both masks).
514 set_ip_source_policy(false, v6
, IPRULE_PRIORITY_ADDR
, &a_old
->addr
,
515 (v6
) ? 128 : 32, table
, NULL
, NULL
);
516 set_ip_source_policy(false, v6
, IPRULE_PRIORITY_NW
, &a_old
->addr
,
517 a_old
->mask
, table
, NULL
, NULL
);
520 system_del_address(dev
, a_old
);
527 a_new
->enabled
= true;
528 if (!(a_new
->flags
& DEVADDR_EXTERNAL
) && (!keep
|| replace
)) {
529 if (system_add_address(dev
, a_new
))
530 a_new
->failed
= true;
533 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
)
536 unsigned int table
= (v6
) ? iface
->ip6table
: iface
->ip4table
;
539 set_ip_source_policy(true, v6
, IPRULE_PRIORITY_ADDR
, &a_new
->addr
,
540 (v6
) ? 128 : 32, table
, NULL
, NULL
);
541 set_ip_source_policy(true, v6
, IPRULE_PRIORITY_NW
, &a_new
->addr
,
542 a_new
->mask
, table
, NULL
, NULL
);
546 if ((a_new
->flags
& DEVADDR_OFFLINK
) || iface
->metric
)
547 interface_handle_subnet_route(iface
, a_new
, true);
553 enable_route(struct interface_ip_settings
*ip
, struct device_route
*route
)
555 if (ip
->no_defaultroute
&& !route
->mask
)
562 interface_update_proto_route(struct vlist_tree
*tree
,
563 struct vlist_node
*node_new
,
564 struct vlist_node
*node_old
)
566 struct interface_ip_settings
*ip
;
567 struct interface
*iface
;
569 struct device_route
*route_old
, *route_new
;
572 ip
= container_of(tree
, struct interface_ip_settings
, route
);
574 dev
= iface
->l3_dev
.dev
;
576 if (!node_new
|| !node_old
)
577 iface
->updated
|= IUF_ROUTE
;
579 route_old
= container_of(node_old
, struct device_route
, node
);
580 route_new
= container_of(node_new
, struct device_route
, node
);
582 if (node_old
&& node_new
)
583 keep
= !memcmp(&route_old
->nexthop
, &route_new
->nexthop
, sizeof(route_old
->nexthop
)) &&
584 (route_old
->table
== route_new
->table
) && !route_old
->failed
;
587 if (!(route_old
->flags
& DEVADDR_EXTERNAL
) && route_old
->enabled
&& !keep
)
588 system_del_route(dev
, route_old
);
594 bool _enabled
= enable_route(ip
, route_new
);
596 if (!(route_new
->flags
& DEVADDR_EXTERNAL
) && !keep
&& _enabled
)
597 if (system_add_route(dev
, route_new
))
598 route_new
->failed
= true;
600 route_new
->iface
= iface
;
601 route_new
->enabled
= _enabled
;
606 interface_update_host_route(struct vlist_tree
*tree
,
607 struct vlist_node
*node_new
,
608 struct vlist_node
*node_old
)
610 struct interface
*iface
;
612 struct device_route
*route_old
, *route_new
;
614 iface
= container_of(tree
, struct interface
, host_routes
);
615 dev
= iface
->l3_dev
.dev
;
617 route_old
= container_of(node_old
, struct device_route
, node
);
618 route_new
= container_of(node_new
, struct device_route
, node
);
621 system_del_route(dev
, route_old
);
626 if (system_add_route(dev
, route_new
))
627 route_new
->failed
= true;
633 interface_set_prefix_address(struct device_prefix_assignment
*assignment
,
634 const struct device_prefix
*prefix
, struct interface
*iface
, bool add
)
636 const struct interface
*uplink
= prefix
->iface
;
637 if (!iface
->l3_dev
.dev
)
640 struct device
*l3_downlink
= iface
->l3_dev
.dev
;
642 struct device_addr addr
;
643 memset(&addr
, 0, sizeof(addr
));
644 addr
.addr
.in6
= prefix
->addr
;
645 addr
.addr
.in6
.s6_addr32
[1] |= htonl(assignment
->assigned
);
646 addr
.addr
.in6
.s6_addr
[15] += 1;
647 addr
.mask
= assignment
->length
;
648 addr
.flags
= DEVADDR_INET6
;
649 addr
.preferred_until
= prefix
->preferred_until
;
650 addr
.valid_until
= prefix
->valid_until
;
652 if (!add
&& assignment
->enabled
) {
653 time_t now
= system_get_rtime();
654 addr
.preferred_until
= now
;
655 if (!addr
.valid_until
|| addr
.valid_until
- now
> 7200)
656 addr
.valid_until
= now
+ 7200;
657 system_del_address(l3_downlink
, &addr
); // Work around dangling prefix routes
658 system_add_address(l3_downlink
, &addr
);
660 if (prefix
->iface
->ip6table
)
661 set_ip_source_policy(false, true, IPRULE_PRIORITY_NW
, &addr
.addr
,
662 addr
.mask
, prefix
->iface
->ip6table
, iface
, NULL
);
664 set_ip_source_policy(false, true, IPRULE_PRIORITY_REJECT
, &addr
.addr
,
665 addr
.mask
, 0, iface
, "unreachable");
668 assignment
->enabled
= false;
669 } else if (add
&& (iface
->state
== IFS_UP
|| iface
->state
== IFS_SETUP
) &&
670 !system_add_address(l3_downlink
, &addr
)) {
671 if (prefix
->iface
&& !assignment
->enabled
) {
672 set_ip_source_policy(true, true, IPRULE_PRIORITY_REJECT
, &addr
.addr
,
673 addr
.mask
, 0, iface
, "unreachable");
675 if (prefix
->iface
->ip6table
)
676 set_ip_source_policy(true, true, IPRULE_PRIORITY_NW
, &addr
.addr
,
677 addr
.mask
, prefix
->iface
->ip6table
, iface
, NULL
);
679 if (uplink
&& uplink
->l3_dev
.dev
) {
680 int mtu
= system_update_ipv6_mtu(
681 uplink
->l3_dev
.dev
, 0);
683 system_update_ipv6_mtu(l3_downlink
, mtu
);
685 assignment
->enabled
= true;
689 static bool interface_prefix_assign(struct list_head
*list
,
690 struct device_prefix_assignment
*assign
)
692 int32_t current
= 0, asize
= (1 << (64 - assign
->length
)) - 1;
693 struct device_prefix_assignment
*c
;
694 list_for_each_entry(c
, list
, head
) {
695 if (assign
->assigned
!= -1) {
696 if (assign
->assigned
>= current
&& assign
->assigned
+ asize
< c
->assigned
) {
697 list_add_tail(&assign
->head
, &c
->head
);
700 } else if (assign
->assigned
== -1) {
701 current
= (current
+ asize
) & (~asize
);
702 if (current
+ asize
< c
->assigned
) {
703 assign
->assigned
= current
;
704 list_add_tail(&assign
->head
, &c
->head
);
708 current
= (c
->assigned
+ (1 << (64 - c
->length
)));
713 static void interface_update_prefix_assignments(struct device_prefix
*prefix
, bool setup
)
715 struct device_prefix_assignment
*c
;
716 struct interface
*iface
;
718 // Delete all assignments
719 while (!list_empty(&prefix
->assignments
)) {
720 c
= list_first_entry(&prefix
->assignments
,
721 struct device_prefix_assignment
, head
);
722 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
723 interface_set_prefix_address(c
, prefix
, iface
, false);
731 // End-of-assignment sentinel
732 c
= malloc(sizeof(*c
) + 1);
733 c
->assigned
= 1 << (64 - prefix
->length
);
736 list_add(&c
->head
, &prefix
->assignments
);
739 if (prefix
->excl_length
> 0) {
740 const char name
[] = "!excluded";
741 c
= malloc(sizeof(*c
) + sizeof(name
));
742 c
->assigned
= ntohl(prefix
->excl_addr
.s6_addr32
[1]) &
743 ((1 << (64 - prefix
->length
)) - 1);
744 c
->length
= prefix
->excl_length
;
745 memcpy(c
->name
, name
, sizeof(name
));
746 list_add(&c
->head
, &prefix
->assignments
);
749 bool assigned_any
= false;
750 struct list_head assign_later
= LIST_HEAD_INIT(assign_later
);
751 vlist_for_each_element(&interfaces
, iface
, node
) {
752 if (iface
->assignment_length
< 48 ||
753 iface
->assignment_length
> 64)
756 // Test whether there is a matching class
757 if (!list_empty(&iface
->assignment_classes
)) {
760 struct interface_assignment_class
*c
;
761 list_for_each_entry(c
, &iface
->assignment_classes
, head
) {
762 if (!strcmp(c
->name
, prefix
->pclass
)) {
772 size_t namelen
= strlen(iface
->name
) + 1;
773 c
= malloc(sizeof(*c
) + namelen
);
774 c
->length
= iface
->assignment_length
;
775 c
->assigned
= iface
->assignment_hint
;
777 memcpy(c
->name
, iface
->name
, namelen
);
779 // First process all custom assignments, put all others in later-list
780 if (c
->assigned
== -1 || !interface_prefix_assign(&prefix
->assignments
, c
)) {
781 if (c
->assigned
!= -1) {
783 netifd_log_message(L_WARNING
, "Failed to assign requested subprefix "
784 "of size %hhu for %s, trying other\n", c
->length
, c
->name
);
787 struct list_head
*next
= &assign_later
;
788 struct device_prefix_assignment
*n
;
789 list_for_each_entry(n
, &assign_later
, head
) {
790 if (n
->length
< c
->length
) {
795 list_add_tail(&c
->head
, next
);
798 if (c
->assigned
!= -1)
802 // Then try to assign all other + failed custom assignments
803 while (!list_empty(&assign_later
)) {
804 c
= list_first_entry(&assign_later
, struct device_prefix_assignment
, head
);
807 bool assigned
= false;
809 assigned
= interface_prefix_assign(&prefix
->assignments
, c
);
810 } while (!assigned
&& ++c
->length
<= 64);
813 netifd_log_message(L_WARNING
, "Failed to assign subprefix "
814 "of size %hhu for %s\n", c
->length
, c
->name
);
821 list_for_each_entry(c
, &prefix
->assignments
, head
)
822 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
823 interface_set_prefix_address(c
, prefix
, iface
, true);
826 netifd_log_message(L_WARNING
, "You have delegated IPv6-prefixes but haven't assigned them "
827 "to any interface. Did you forget to set option ip6assign on your lan-interfaces?");
831 void interface_refresh_assignments(bool hint
)
833 static bool refresh
= false;
834 if (!hint
&& refresh
) {
835 struct device_prefix
*p
;
836 list_for_each_entry(p
, &prefixes
, head
)
837 interface_update_prefix_assignments(p
, true);
844 interface_update_prefix(struct vlist_tree
*tree
,
845 struct vlist_node
*node_new
,
846 struct vlist_node
*node_old
)
848 struct device_prefix
*prefix_old
, *prefix_new
;
849 prefix_old
= container_of(node_old
, struct device_prefix
, node
);
850 prefix_new
= container_of(node_new
, struct device_prefix
, node
);
852 struct interface_ip_settings
*ip
= container_of(tree
, struct interface_ip_settings
, prefix
);
853 if (tree
&& (!node_new
|| !node_old
))
854 ip
->iface
->updated
|= IUF_PREFIX
;
856 struct device_route route
;
857 memset(&route
, 0, sizeof(route
));
858 route
.flags
= DEVADDR_INET6
;
859 route
.metric
= INT32_MAX
;
860 route
.mask
= (node_new
) ? prefix_new
->length
: prefix_old
->length
;
861 route
.addr
.in6
= (node_new
) ? prefix_new
->addr
: prefix_old
->addr
;
864 struct device_prefix_assignment
*c
;
865 struct interface
*iface
;
867 if (node_old
&& node_new
) {
868 // Move assignments and refresh addresses to update valid times
869 list_splice(&prefix_old
->assignments
, &prefix_new
->assignments
);
871 list_for_each_entry(c
, &prefix_new
->assignments
, head
)
872 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
873 interface_set_prefix_address(c
, prefix_new
, iface
, true);
874 } else if (node_new
) {
875 // Set null-route to avoid routing loops
876 system_add_route(NULL
, &route
);
878 if (!prefix_new
->iface
|| !prefix_new
->iface
->proto_ip
.no_delegation
)
879 interface_update_prefix_assignments(prefix_new
, true);
880 } else if (node_old
) {
882 interface_update_prefix_assignments(prefix_old
, false);
883 system_del_route(NULL
, &route
);
887 if (prefix_old
->head
.next
)
888 list_del(&prefix_old
->head
);
892 if (node_new
&& (!prefix_new
->iface
|| !prefix_new
->iface
->proto_ip
.no_delegation
))
893 list_add(&prefix_new
->head
, &prefixes
);
897 struct device_prefix
*
898 interface_ip_add_device_prefix(struct interface
*iface
, struct in6_addr
*addr
,
899 uint8_t length
, time_t valid_until
, time_t preferred_until
,
900 struct in6_addr
*excl_addr
, uint8_t excl_length
, const char *pclass
)
903 pclass
= (iface
) ? iface
->name
: "local";
905 struct device_prefix
*prefix
= calloc(1, sizeof(*prefix
) + strlen(pclass
) + 1);
906 prefix
->length
= length
;
907 prefix
->addr
= *addr
;
908 prefix
->preferred_until
= preferred_until
;
909 prefix
->valid_until
= valid_until
;
910 prefix
->iface
= iface
;
911 INIT_LIST_HEAD(&prefix
->assignments
);
914 prefix
->excl_addr
= *excl_addr
;
915 prefix
->excl_length
= excl_length
;
918 strcpy(prefix
->pclass
, pclass
);
921 vlist_add(&iface
->proto_ip
.prefix
, &prefix
->node
, &prefix
->addr
);
923 interface_update_prefix(NULL
, &prefix
->node
, NULL
);
929 interface_ip_set_ula_prefix(const char *prefix
)
931 char buf
[INET6_ADDRSTRLEN
+ 4] = {0}, *saveptr
;
933 strncpy(buf
, prefix
, sizeof(buf
) - 1);
934 char *prefixaddr
= strtok_r(buf
, "/", &saveptr
);
936 struct in6_addr addr
;
937 if (!prefixaddr
|| inet_pton(AF_INET6
, prefixaddr
, &addr
) < 1) {
939 interface_update_prefix(NULL
, NULL
, &ula_prefix
->node
);
946 char *prefixlen
= strtok_r(NULL
, ",", &saveptr
);
947 if (!prefixlen
|| (length
= atoi(prefixlen
)) < 1 || length
> 64)
950 if (!ula_prefix
|| !IN6_ARE_ADDR_EQUAL(&addr
, &ula_prefix
->addr
) ||
951 ula_prefix
->length
!= length
) {
953 interface_update_prefix(NULL
, NULL
, &ula_prefix
->node
);
955 ula_prefix
= interface_ip_add_device_prefix(NULL
, &addr
, length
,
956 0, 0, NULL
, 0, NULL
);
961 interface_add_dns_server(struct interface_ip_settings
*ip
, const char *str
)
963 struct dns_server
*s
;
965 s
= calloc(1, sizeof(*s
));
970 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
974 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
981 D(INTERFACE
, "Add IPv%c DNS server: %s\n",
982 s
->af
== AF_INET6
? '6' : '4', str
);
983 vlist_simple_add(&ip
->dns_servers
, &s
->node
);
987 interface_add_dns_server_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
989 struct blob_attr
*cur
;
992 blobmsg_for_each_attr(cur
, list
, rem
) {
993 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
996 if (!blobmsg_check_attr(cur
, NULL
))
999 interface_add_dns_server(ip
, blobmsg_data(cur
));
1004 interface_add_dns_search_domain(struct interface_ip_settings
*ip
, const char *str
)
1006 struct dns_search_domain
*s
;
1007 int len
= strlen(str
);
1009 s
= calloc(1, sizeof(*s
) + len
+ 1);
1013 D(INTERFACE
, "Add DNS search domain: %s\n", str
);
1014 memcpy(s
->name
, str
, len
);
1015 vlist_simple_add(&ip
->dns_search
, &s
->node
);
1019 interface_add_dns_search_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
1021 struct blob_attr
*cur
;
1024 blobmsg_for_each_attr(cur
, list
, rem
) {
1025 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
1028 if (!blobmsg_check_attr(cur
, NULL
))
1031 interface_add_dns_search_domain(ip
, blobmsg_data(cur
));
1036 write_resolv_conf_entries(FILE *f
, struct interface_ip_settings
*ip
, const char *dev
)
1038 struct dns_server
*s
;
1039 struct dns_search_domain
*d
;
1041 char buf
[INET6_ADDRSTRLEN
];
1043 vlist_simple_for_each_element(&ip
->dns_servers
, s
, node
) {
1044 str
= inet_ntop(s
->af
, &s
->addr
, buf
, sizeof(buf
));
1048 if (s
->af
== AF_INET6
&& IN6_IS_ADDR_LINKLOCAL(&s
->addr
.in6
))
1049 fprintf(f
, "nameserver %s%%%s\n", str
, dev
);
1051 fprintf(f
, "nameserver %s\n", str
);
1054 vlist_simple_for_each_element(&ip
->dns_search
, d
, node
) {
1055 fprintf(f
, "search %s\n", d
->name
);
1060 interface_write_resolv_conf(void)
1062 struct interface
*iface
;
1063 char *path
= alloca(strlen(resolv_conf
) + 5);
1065 uint32_t crcold
, crcnew
;
1067 sprintf(path
, "%s.tmp", resolv_conf
);
1069 f
= fopen(path
, "w+");
1071 D(INTERFACE
, "Failed to open %s for writing\n", path
);
1075 vlist_for_each_element(&interfaces
, iface
, node
) {
1076 if (iface
->state
!= IFS_UP
)
1079 if (vlist_simple_empty(&iface
->proto_ip
.dns_search
) &&
1080 vlist_simple_empty(&iface
->proto_ip
.dns_servers
) &&
1081 vlist_simple_empty(&iface
->config_ip
.dns_search
) &&
1082 vlist_simple_empty(&iface
->config_ip
.dns_servers
))
1085 fprintf(f
, "# Interface %s\n", iface
->name
);
1086 write_resolv_conf_entries(f
, &iface
->config_ip
, iface
->ifname
);
1087 if (!iface
->proto_ip
.no_dns
)
1088 write_resolv_conf_entries(f
, &iface
->proto_ip
, iface
->ifname
);
1092 crcnew
= crc32_file(f
);
1095 crcold
= crcnew
+ 1;
1096 f
= fopen(resolv_conf
, "r");
1098 crcold
= crc32_file(f
);
1102 if (crcold
== crcnew
) {
1104 } else if (rename(path
, resolv_conf
) < 0) {
1105 D(INTERFACE
, "Failed to replace %s\n", resolv_conf
);
1110 void interface_ip_set_enabled(struct interface_ip_settings
*ip
, bool enabled
)
1112 struct device_addr
*addr
;
1113 struct device_route
*route
;
1116 ip
->enabled
= enabled
;
1117 dev
= ip
->iface
->l3_dev
.dev
;
1121 vlist_for_each_element(&ip
->addr
, addr
, node
) {
1122 if (addr
->enabled
== enabled
)
1126 system_add_address(dev
, addr
);
1128 system_del_address(dev
, addr
);
1129 addr
->enabled
= enabled
;
1132 vlist_for_each_element(&ip
->route
, route
, node
) {
1133 bool _enabled
= enabled
;
1135 if (!enable_route(ip
, route
))
1138 if (route
->enabled
== _enabled
)
1142 if (!(route
->flags
& DEVROUTE_METRIC
))
1143 route
->metric
= ip
->iface
->metric
;
1145 if (system_add_route(dev
, route
))
1146 route
->failed
= true;
1148 system_del_route(dev
, route
);
1149 route
->enabled
= _enabled
;
1152 struct device_prefix
*c
;
1153 struct device_prefix_assignment
*a
;
1154 list_for_each_entry(c
, &prefixes
, head
)
1155 list_for_each_entry(a
, &c
->assignments
, head
)
1156 if (!strcmp(a
->name
, ip
->iface
->name
))
1157 interface_set_prefix_address(a
, c
, ip
->iface
, enabled
);
1159 if (ip
->iface
&& ip
->iface
->l3_dev
.dev
) {
1160 set_ip_lo_policy(enabled
, true, ip
->iface
);
1161 set_ip_lo_policy(enabled
, false, ip
->iface
);
1163 set_ip_source_policy(enabled
, true, IPRULE_PRIORITY_REJECT
+ ip
->iface
->l3_dev
.dev
->ifindex
,
1164 NULL
, 0, 0, ip
->iface
, "failed_policy");
1169 interface_ip_update_start(struct interface_ip_settings
*ip
)
1171 if (ip
!= &ip
->iface
->config_ip
) {
1172 vlist_simple_update(&ip
->dns_servers
);
1173 vlist_simple_update(&ip
->dns_search
);
1175 vlist_update(&ip
->route
);
1176 vlist_update(&ip
->addr
);
1177 vlist_update(&ip
->prefix
);
1181 interface_ip_update_complete(struct interface_ip_settings
*ip
)
1183 vlist_simple_flush(&ip
->dns_servers
);
1184 vlist_simple_flush(&ip
->dns_search
);
1185 vlist_flush(&ip
->route
);
1186 vlist_flush(&ip
->addr
);
1187 vlist_flush(&ip
->prefix
);
1188 interface_write_resolv_conf();
1192 interface_ip_flush(struct interface_ip_settings
*ip
)
1194 if (ip
== &ip
->iface
->proto_ip
)
1195 vlist_flush_all(&ip
->iface
->host_routes
);
1196 vlist_simple_flush_all(&ip
->dns_servers
);
1197 vlist_simple_flush_all(&ip
->dns_search
);
1198 vlist_flush_all(&ip
->route
);
1199 vlist_flush_all(&ip
->addr
);
1200 vlist_flush_all(&ip
->prefix
);
1204 __interface_ip_init(struct interface_ip_settings
*ip
, struct interface
*iface
)
1208 vlist_simple_init(&ip
->dns_search
, struct dns_search_domain
, node
);
1209 vlist_simple_init(&ip
->dns_servers
, struct dns_server
, node
);
1210 vlist_init(&ip
->route
, route_cmp
, interface_update_proto_route
);
1211 vlist_init(&ip
->addr
, addr_cmp
, interface_update_proto_addr
);
1212 vlist_init(&ip
->prefix
, prefix_cmp
, interface_update_prefix
);
1216 interface_ip_init(struct interface
*iface
)
1218 __interface_ip_init(&iface
->proto_ip
, iface
);
1219 __interface_ip_init(&iface
->config_ip
, iface
);
1220 vlist_init(&iface
->host_routes
, route_cmp
, interface_update_host_route
);
1225 interface_ip_valid_until_handler(struct uloop_timeout
*t
)
1227 time_t now
= system_get_rtime();
1228 struct interface
*iface
;
1229 vlist_for_each_element(&interfaces
, iface
, node
) {
1230 if (iface
->state
!= IFS_UP
)
1233 struct device_addr
*addr
, *addrp
;
1234 struct device_route
*route
, *routep
;
1235 struct device_prefix
*pref
, *prefp
;
1237 vlist_for_each_element_safe(&iface
->proto_ip
.addr
, addr
, node
, addrp
)
1238 if (addr
->valid_until
&& addr
->valid_until
< now
)
1239 vlist_delete(&iface
->proto_ip
.addr
, &addr
->node
);
1241 vlist_for_each_element_safe(&iface
->proto_ip
.route
, route
, node
, routep
)
1242 if (route
->valid_until
&& route
->valid_until
< now
)
1243 vlist_delete(&iface
->proto_ip
.route
, &route
->node
);
1245 vlist_for_each_element_safe(&iface
->proto_ip
.prefix
, pref
, node
, prefp
)
1246 if (pref
->valid_until
&& pref
->valid_until
< now
)
1247 vlist_delete(&iface
->proto_ip
.prefix
, &pref
->node
);
1251 uloop_timeout_set(t
, 1000);
1255 interface_ip_init_worker(void)
1257 valid_until_timeout
.cb
= interface_ip_valid_until_handler
;
1258 uloop_timeout_set(&valid_until_timeout
, 1000);