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"
46 static const struct blobmsg_policy route_attr
[__ROUTE_MAX
] = {
47 [ROUTE_INTERFACE
] = { .name
= "interface", .type
= BLOBMSG_TYPE_STRING
},
48 [ROUTE_TARGET
] = { .name
= "target", .type
= BLOBMSG_TYPE_STRING
},
49 [ROUTE_MASK
] = { .name
= "netmask", .type
= BLOBMSG_TYPE_STRING
},
50 [ROUTE_GATEWAY
] = { .name
= "gateway", .type
= BLOBMSG_TYPE_STRING
},
51 [ROUTE_METRIC
] = { .name
= "metric", .type
= BLOBMSG_TYPE_INT32
},
52 [ROUTE_MTU
] = { .name
= "mtu", .type
= BLOBMSG_TYPE_INT32
},
53 [ROUTE_TABLE
] = { .name
= "table", .type
= BLOBMSG_TYPE_STRING
},
54 [ROUTE_VALID
] = { .name
= "valid", .type
= BLOBMSG_TYPE_INT32
},
55 [ROUTE_SOURCE
] = { .name
= "source", .type
= BLOBMSG_TYPE_STRING
},
56 [ROUTE_ONLINK
] = { .name
= "onlink", .type
= BLOBMSG_TYPE_BOOL
},
57 [ROUTE_TYPE
] = { .name
= "type", .type
= BLOBMSG_TYPE_STRING
}
60 const struct uci_blob_param_list route_attr_list
= {
61 .n_params
= __ROUTE_MAX
,
66 struct list_head prefixes
= LIST_HEAD_INIT(prefixes
);
67 static struct device_prefix
*ula_prefix
= NULL
;
68 static struct uloop_timeout valid_until_timeout
;
72 clear_if_addr(union if_addr
*a
, int mask
)
74 int m_bytes
= (mask
+ 7) / 8;
75 uint8_t m_clear
= (1 << (m_bytes
* 8 - mask
)) - 1;
76 uint8_t *p
= (uint8_t *) a
;
78 if (m_bytes
< sizeof(*a
))
79 memset(p
+ m_bytes
, 0, sizeof(*a
) - m_bytes
);
81 p
[m_bytes
- 1] &= ~m_clear
;
85 match_if_addr(union if_addr
*a1
, union if_addr
*a2
, int mask
)
87 union if_addr
*p1
, *p2
;
89 p1
= alloca(sizeof(*a1
));
90 p2
= alloca(sizeof(*a2
));
92 memcpy(p1
, a1
, sizeof(*a1
));
93 clear_if_addr(p1
, mask
);
94 memcpy(p2
, a2
, sizeof(*a2
));
95 clear_if_addr(p2
, mask
);
97 return !memcmp(p1
, p2
, sizeof(*p1
));
100 static int set_ip_source_policy(bool add
, bool v6
, unsigned int priority
,
101 const union if_addr
*addr
, uint8_t mask
, unsigned int table
,
102 struct interface
*in_iface
, const char *action
)
104 struct iprule rule
= {
105 .flags
= IPRULE_PRIORITY
,
110 rule
.flags
|= IPRULE_SRC
;
111 rule
.src_addr
= *addr
;
112 rule
.src_mask
= mask
;
116 rule
.flags
|= IPRULE_LOOKUP
;
122 rule
.flags
|= IPRULE_ACTION
;
123 system_resolve_iprule_action(action
, &rule
.action
);
126 if (in_iface
&& in_iface
->l3_dev
.dev
) {
127 rule
.flags
|= IPRULE_IN
;
128 strcpy(rule
.in_dev
, in_iface
->l3_dev
.dev
->ifname
);
131 rule
.flags
|= (v6
) ? IPRULE_INET6
: IPRULE_INET4
;
133 return (add
) ? system_add_iprule(&rule
) : system_del_iprule(&rule
);
136 static int set_ip_lo_policy(bool add
, bool v6
, struct interface
*iface
)
138 struct iprule rule
= {
139 .flags
= IPRULE_IN
| IPRULE_LOOKUP
| IPRULE_PRIORITY
,
140 .priority
= IPRULE_PRIORITY_NW
+ iface
->l3_dev
.dev
->ifindex
,
141 .lookup
= (v6
) ? iface
->ip6table
: iface
->ip4table
,
148 rule
.flags
|= (v6
) ? IPRULE_INET6
: IPRULE_INET4
;
150 return (add
) ? system_add_iprule(&rule
) : system_del_iprule(&rule
);
154 __find_ip_addr_target(struct interface_ip_settings
*ip
, union if_addr
*a
, bool v6
)
156 struct device_addr
*addr
;
158 vlist_for_each_element(&ip
->addr
, addr
, node
) {
162 if (v6
!= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
))
165 // Handle offlink addresses correctly
166 unsigned int mask
= addr
->mask
;
167 if ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
&&
168 (addr
->flags
& DEVADDR_OFFLINK
))
171 if (!match_if_addr(&addr
->addr
, a
, mask
))
181 __find_ip_route_target(struct interface_ip_settings
*ip
, union if_addr
*a
,
182 bool v6
, struct device_route
**res
)
184 struct device_route
*route
;
186 vlist_for_each_element(&ip
->route
, route
, node
) {
190 if (v6
!= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
))
193 if (!match_if_addr(&route
->addr
, a
, route
->mask
))
196 if (route
->flags
& DEVROUTE_TABLE
)
199 if (!*res
|| route
->mask
< (*res
)->mask
)
205 interface_ip_find_addr_target(struct interface
*iface
, union if_addr
*a
, bool v6
)
207 return __find_ip_addr_target(&iface
->proto_ip
, a
, v6
) ||
208 __find_ip_addr_target(&iface
->config_ip
, a
, v6
);
212 interface_ip_find_route_target(struct interface
*iface
, union if_addr
*a
,
213 bool v6
, struct device_route
**route
)
215 __find_ip_route_target(&iface
->proto_ip
, a
, v6
, route
);
216 __find_ip_route_target(&iface
->config_ip
, a
, v6
, route
);
220 interface_ip_add_target_route(union if_addr
*addr
, bool v6
, struct interface
*iface
)
222 struct device_route
*route
, *r_next
= NULL
;
223 bool defaultroute_target
= false;
224 int addrsize
= v6
? sizeof(addr
->in6
) : sizeof(addr
->in
);
226 route
= calloc(1, sizeof(*route
));
230 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
231 route
->mask
= v6
? 128 : 32;
232 if (memcmp(&route
->addr
, addr
, addrsize
) == 0)
233 defaultroute_target
= true;
235 memcpy(&route
->addr
, addr
, addrsize
);
238 /* look for locally addressable target first */
239 if (interface_ip_find_addr_target(iface
, addr
, v6
))
242 /* do not stop at the first route, let the lookup compare
243 * masks to find the best match */
244 interface_ip_find_route_target(iface
, addr
, v6
, &r_next
);
246 vlist_for_each_element(&interfaces
, iface
, node
) {
247 /* look for locally addressable target first */
248 if (interface_ip_find_addr_target(iface
, addr
, v6
))
251 /* do not stop at the first route, let the lookup compare
252 * masks to find the best match */
253 interface_ip_find_route_target(iface
, addr
, v6
, &r_next
);
262 iface
= r_next
->iface
;
263 memcpy(&route
->nexthop
, &r_next
->nexthop
, sizeof(route
->nexthop
));
264 route
->mtu
= r_next
->mtu
;
265 route
->metric
= r_next
->metric
;
266 route
->table
= r_next
->table
;
269 route
->iface
= iface
;
270 if (defaultroute_target
)
273 vlist_add(&iface
->host_routes
, &route
->node
, route
);
278 interface_ip_add_route(struct interface
*iface
, struct blob_attr
*attr
, bool v6
)
280 struct interface_ip_settings
*ip
;
281 struct blob_attr
*tb
[__ROUTE_MAX
], *cur
;
282 struct device_route
*route
;
283 int af
= v6
? AF_INET6
: AF_INET
;
284 bool is_proto_route
= !!iface
;
286 blobmsg_parse(route_attr
, __ROUTE_MAX
, tb
, blobmsg_data(attr
), blobmsg_data_len(attr
));
289 if ((cur
= tb
[ROUTE_INTERFACE
]) == NULL
)
292 iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
296 ip
= &iface
->config_ip
;
298 ip
= &iface
->proto_ip
;
301 route
= calloc(1, sizeof(*route
));
305 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
306 route
->mask
= v6
? 128 : 32;
307 if ((cur
= tb
[ROUTE_MASK
]) != NULL
) {
308 route
->mask
= parse_netmask_string(blobmsg_data(cur
), v6
);
309 if (route
->mask
> (v6
? 128 : 32))
313 if ((cur
= tb
[ROUTE_TARGET
]) != NULL
) {
314 if (!parse_ip_and_netmask(af
, blobmsg_data(cur
), &route
->addr
, &route
->mask
)) {
315 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur
));
320 if ((cur
= tb
[ROUTE_GATEWAY
]) != NULL
) {
321 if (!inet_pton(af
, blobmsg_data(cur
), &route
->nexthop
)) {
322 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur
));
327 if ((cur
= tb
[ROUTE_METRIC
]) != NULL
) {
328 route
->metric
= blobmsg_get_u32(cur
);
329 route
->flags
|= DEVROUTE_METRIC
;
331 route
->metric
= iface
->metric
;
333 if ((cur
= tb
[ROUTE_MTU
]) != NULL
) {
334 route
->mtu
= blobmsg_get_u32(cur
);
335 route
->flags
|= DEVROUTE_MTU
;
338 // Use source-based routing
339 if ((cur
= tb
[ROUTE_SOURCE
]) != NULL
) {
340 char *saveptr
, *source
= alloca(blobmsg_data_len(cur
));
341 memcpy(source
, blobmsg_data(cur
), blobmsg_data_len(cur
));
343 const char *addr
= strtok_r(source
, "/", &saveptr
);
344 const char *mask
= strtok_r(NULL
, "/", &saveptr
);
346 if (!addr
|| inet_pton(af
, addr
, &route
->source
) < 1) {
347 DPRINTF("Failed to parse route source: %s\n", addr
);
351 route
->sourcemask
= (mask
) ? atoi(mask
) : ((af
== AF_INET6
) ? 128 : 32);
354 if ((cur
= tb
[ROUTE_ONLINK
]) != NULL
&& blobmsg_get_bool(cur
))
355 route
->flags
|= DEVROUTE_ONLINK
;
357 if (is_proto_route
) {
358 route
->table
= (v6
) ? iface
->ip6table
: iface
->ip4table
;
359 route
->flags
|= DEVROUTE_SRCTABLE
;
362 if ((cur
= tb
[ROUTE_TABLE
]) != NULL
) {
363 if (!system_resolve_rt_table(blobmsg_data(cur
), &route
->table
)) {
364 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur
));
368 /* only set the table flag if not using the main (default) table */
369 if (system_is_default_rt_table(route
->table
))
373 route
->flags
|= DEVROUTE_TABLE
;
376 if ((cur
= tb
[ROUTE_VALID
]) != NULL
) {
377 int64_t valid
= blobmsg_get_u32(cur
);
378 int64_t valid_until
= valid
+ (int64_t)system_get_rtime();
379 if (valid_until
<= LONG_MAX
&& valid
!= 0xffffffffLL
) // Catch overflow
380 route
->valid_until
= valid_until
;
383 if ((cur
= tb
[ROUTE_TYPE
]) != NULL
) {
384 if (!system_resolve_rt_type(blobmsg_data(cur
), &route
->type
)) {
385 DPRINTF("Failed to resolve routing type: %s\n", (char *) blobmsg_data(cur
));
388 route
->flags
|= DEVROUTE_TYPE
;
391 vlist_add(&ip
->route
, &route
->node
, route
);
399 addr_cmp(const void *k1
, const void *k2
, void *ptr
)
401 return memcmp(k1
, k2
, sizeof(struct device_addr
) -
402 offsetof(struct device_addr
, flags
));
406 route_cmp(const void *k1
, const void *k2
, void *ptr
)
408 const struct device_route
*r1
= k1
, *r2
= k2
;
410 if (r1
->mask
!= r2
->mask
)
411 return r2
->mask
- r1
->mask
;
413 if (r1
->metric
!= r2
->metric
)
414 return r1
->metric
- r2
->metric
;
416 if (r1
->flags
!= r2
->flags
)
417 return r2
->flags
- r1
->flags
;
419 if (r1
->sourcemask
!= r2
->sourcemask
)
420 return r1
->sourcemask
- r2
->sourcemask
;
422 if (r1
->table
!= r2
->table
)
423 return r1
->table
- r2
->table
;
425 int maskcmp
= memcmp(&r1
->source
, &r2
->source
, sizeof(r1
->source
));
429 return memcmp(&r1
->addr
, &r2
->addr
, sizeof(r1
->addr
));
433 prefix_cmp(const void *k1
, const void *k2
, void *ptr
)
435 return memcmp(k1
, k2
, offsetof(struct device_prefix
, pclass
) -
436 offsetof(struct device_prefix
, addr
));
440 interface_handle_subnet_route(struct interface
*iface
, struct device_addr
*addr
, bool add
)
442 struct device
*dev
= iface
->l3_dev
.dev
;
443 struct device_route route
;
445 if (addr
->flags
& DEVADDR_OFFLINK
)
448 memset(&route
, 0, sizeof(route
));
450 route
.flags
= addr
->flags
;
451 route
.mask
= addr
->mask
;
452 memcpy(&route
.addr
, &addr
->addr
, sizeof(route
.addr
));
453 clear_if_addr(&route
.addr
, route
.mask
);
456 route
.flags
|= DEVADDR_KERNEL
;
457 system_del_route(dev
, &route
);
459 route
.flags
&= ~DEVADDR_KERNEL
;
460 route
.metric
= iface
->metric
;
461 system_add_route(dev
, &route
);
463 system_del_route(dev
, &route
);
468 interface_update_proto_addr(struct vlist_tree
*tree
,
469 struct vlist_node
*node_new
,
470 struct vlist_node
*node_old
)
472 struct interface_ip_settings
*ip
;
473 struct interface
*iface
;
475 struct device_addr
*a_new
= NULL
, *a_old
= NULL
;
476 bool replace
= false;
480 ip
= container_of(tree
, struct interface_ip_settings
, addr
);
482 dev
= iface
->l3_dev
.dev
;
484 if (!node_new
|| !node_old
)
485 iface
->updated
|= IUF_ADDRESS
;
488 a_new
= container_of(node_new
, struct device_addr
, node
);
490 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
493 /* /31 and /32 addressing need 255.255.255.255
494 * as broadcast address. */
495 if (a_new
->mask
>= 31) {
496 a_new
->broadcast
= (uint32_t) ~0;
499 uint32_t *a
= (uint32_t *) &a_new
->addr
;
501 mask
>>= a_new
->mask
;
502 a_new
->broadcast
= *a
| htonl(mask
);
508 a_old
= container_of(node_old
, struct device_addr
, node
);
510 if (a_new
&& a_old
) {
513 if (a_old
->flags
!= a_new
->flags
|| a_old
->failed
)
516 if (a_old
->valid_until
!= a_new
->valid_until
||
517 a_old
->preferred_until
!= a_new
->preferred_until
)
520 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
521 a_new
->broadcast
!= a_old
->broadcast
)
526 if (a_old
->enabled
&& !keep
) {
527 if ((a_old
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
)
530 //This is needed for source routing to work correctly. If a device
531 //has two connections to a network using the same subnet, adding
532 //only the network-rule will cause packets to be routed through the
533 //first matching network (source IP matches both masks).
534 if (a_old
->policy_table
)
535 set_ip_source_policy(false, v6
, IPRULE_PRIORITY_ADDR
, &a_old
->addr
,
536 (v6
) ? 128 : 32, a_old
->policy_table
, NULL
, NULL
);
538 if (!(a_old
->flags
& DEVADDR_EXTERNAL
)) {
539 interface_handle_subnet_route(iface
, a_old
, false);
540 system_del_address(dev
, a_old
);
548 a_new
->enabled
= true;
550 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
)
553 a_new
->policy_table
= (v6
) ? iface
->ip6table
: iface
->ip4table
;
555 if (!keep
|| replace
) {
556 if (!(a_new
->flags
& DEVADDR_EXTERNAL
)) {
557 if (system_add_address(dev
, a_new
))
558 a_new
->failed
= true;
561 interface_handle_subnet_route(iface
, a_new
, true);
565 if (a_new
->policy_table
)
566 set_ip_source_policy(true, v6
, IPRULE_PRIORITY_ADDR
, &a_new
->addr
,
567 (v6
) ? 128 : 32, a_new
->policy_table
, NULL
, NULL
);
574 enable_route(struct interface_ip_settings
*ip
, struct device_route
*route
)
576 if (ip
->no_defaultroute
&& !route
->mask
)
583 interface_update_proto_route(struct vlist_tree
*tree
,
584 struct vlist_node
*node_new
,
585 struct vlist_node
*node_old
)
587 struct interface_ip_settings
*ip
;
588 struct interface
*iface
;
590 struct device_route
*route_old
, *route_new
;
593 ip
= container_of(tree
, struct interface_ip_settings
, route
);
595 dev
= iface
->l3_dev
.dev
;
597 if (!node_new
|| !node_old
)
598 iface
->updated
|= IUF_ROUTE
;
600 route_old
= container_of(node_old
, struct device_route
, node
);
601 route_new
= container_of(node_new
, struct device_route
, node
);
603 if (node_old
&& node_new
)
604 keep
= !memcmp(&route_old
->nexthop
, &route_new
->nexthop
, sizeof(route_old
->nexthop
)) &&
605 (route_old
->mtu
== route_new
->mtu
) && (route_old
->type
== route_new
->type
) &&
609 if (!(route_old
->flags
& DEVADDR_EXTERNAL
) && route_old
->enabled
&& !keep
)
610 system_del_route(dev
, route_old
);
616 bool _enabled
= enable_route(ip
, route_new
);
618 if (!(route_new
->flags
& DEVADDR_EXTERNAL
) && !keep
&& _enabled
)
619 if (system_add_route(dev
, route_new
))
620 route_new
->failed
= true;
622 route_new
->iface
= iface
;
623 route_new
->enabled
= _enabled
;
628 interface_update_host_route(struct vlist_tree
*tree
,
629 struct vlist_node
*node_new
,
630 struct vlist_node
*node_old
)
632 struct interface
*iface
;
634 struct device_route
*route_old
, *route_new
;
636 iface
= container_of(tree
, struct interface
, host_routes
);
637 dev
= iface
->l3_dev
.dev
;
639 route_old
= container_of(node_old
, struct device_route
, node
);
640 route_new
= container_of(node_new
, struct device_route
, node
);
643 system_del_route(dev
, route_old
);
648 if (system_add_route(dev
, route_new
))
649 route_new
->failed
= true;
654 random_ifaceid(struct in6_addr
*addr
)
656 static bool initialized
= false;
661 gettimeofday(&t
, NULL
);
662 seed
= t
.tv_sec
^ t
.tv_usec
^ getpid();
666 addr
->s6_addr32
[2] = (uint32_t)mrand48();
667 addr
->s6_addr32
[3] = (uint32_t)mrand48();
671 eui64_ifaceid(struct interface
*iface
, struct in6_addr
*addr
)
673 /* get mac address */
674 uint8_t *macaddr
= iface
->l3_dev
.dev
->settings
.macaddr
;
675 uint8_t *ifaceid
= addr
->s6_addr
+ 8;
676 memcpy(ifaceid
,macaddr
,3);
677 memcpy(ifaceid
+ 5,macaddr
+ 3, 3);
684 generate_ifaceid(struct interface
*iface
, struct in6_addr
*addr
)
686 /* generate new iface id */
687 switch (iface
->assignment_iface_id_selection
) {
690 /* copy host part from assignment_fixed_iface_id */
691 memcpy(addr
->s6_addr
+ 8, iface
->assignment_fixed_iface_id
.s6_addr
+ 8, 8);
694 /* randomize last 64 bits */
695 random_ifaceid(addr
);
699 eui64_ifaceid(iface
, addr
);
705 interface_set_prefix_address(struct device_prefix_assignment
*assignment
,
706 const struct device_prefix
*prefix
, struct interface
*iface
, bool add
)
708 const struct interface
*uplink
= prefix
->iface
;
709 if (!iface
->l3_dev
.dev
)
712 struct device
*l3_downlink
= iface
->l3_dev
.dev
;
714 struct device_addr addr
;
715 struct device_route route
;
716 memset(&addr
, 0, sizeof(addr
));
717 memset(&route
, 0, sizeof(route
));
719 if (IN6_IS_ADDR_UNSPECIFIED(&assignment
->addr
)) {
720 addr
.addr
.in6
= prefix
->addr
;
721 addr
.addr
.in6
.s6_addr32
[1] |= htonl(assignment
->assigned
);
722 generate_ifaceid(iface
, &addr
.addr
.in6
);
723 assignment
->addr
= addr
.addr
.in6
;
726 addr
.addr
.in6
= assignment
->addr
;
728 addr
.mask
= assignment
->length
;
729 addr
.flags
= DEVADDR_INET6
| DEVADDR_OFFLINK
;
730 addr
.preferred_until
= prefix
->preferred_until
;
731 addr
.valid_until
= prefix
->valid_until
;
733 route
.flags
= DEVADDR_INET6
;
734 route
.mask
= addr
.mask
< 64 ? 64 : addr
.mask
;
735 route
.addr
= addr
.addr
;
736 clear_if_addr(&route
.addr
, route
.mask
);
738 if (!add
&& assignment
->enabled
) {
739 time_t now
= system_get_rtime();
740 addr
.preferred_until
= now
;
741 if (!addr
.valid_until
|| addr
.valid_until
- now
> 7200)
742 addr
.valid_until
= now
+ 7200;
745 if (prefix
->iface
->ip6table
)
746 set_ip_source_policy(false, true, IPRULE_PRIORITY_NW
, &addr
.addr
,
747 addr
.mask
, prefix
->iface
->ip6table
, iface
, NULL
);
749 set_ip_source_policy(false, true, IPRULE_PRIORITY_REJECT
, &addr
.addr
,
750 addr
.mask
, 0, iface
, "unreachable");
753 system_del_route(l3_downlink
, &route
);
754 system_add_address(l3_downlink
, &addr
);
756 assignment
->enabled
= false;
757 } else if (add
&& (iface
->state
== IFS_UP
|| iface
->state
== IFS_SETUP
) &&
758 !system_add_address(l3_downlink
, &addr
)) {
760 if (prefix
->iface
&& !assignment
->enabled
) {
761 set_ip_source_policy(true, true, IPRULE_PRIORITY_REJECT
, &addr
.addr
,
762 addr
.mask
, 0, iface
, "unreachable");
764 if (prefix
->iface
->ip6table
)
765 set_ip_source_policy(true, true, IPRULE_PRIORITY_NW
, &addr
.addr
,
766 addr
.mask
, prefix
->iface
->ip6table
, iface
, NULL
);
769 route
.metric
= iface
->metric
;
770 system_add_route(l3_downlink
, &route
);
772 if (uplink
&& uplink
->l3_dev
.dev
&& !(l3_downlink
->settings
.flags
& DEV_OPT_MTU6
)) {
773 int mtu
= system_update_ipv6_mtu(uplink
->l3_dev
.dev
, 0);
774 int mtu_old
= system_update_ipv6_mtu(l3_downlink
, 0);
776 if (mtu
> 0 && mtu_old
> mtu
)
777 system_update_ipv6_mtu(l3_downlink
, mtu
);
780 assignment
->enabled
= true;
784 static bool interface_prefix_assign(struct list_head
*list
,
785 struct device_prefix_assignment
*assign
)
787 int32_t current
= 0, asize
= (1 << (64 - assign
->length
)) - 1;
788 struct device_prefix_assignment
*c
;
789 list_for_each_entry(c
, list
, head
) {
790 if (assign
->assigned
!= -1) {
791 if (assign
->assigned
>= current
&& assign
->assigned
+ asize
< c
->assigned
) {
792 list_add_tail(&assign
->head
, &c
->head
);
795 } else if (assign
->assigned
== -1) {
796 current
= (current
+ asize
) & (~asize
);
797 if (current
+ asize
< c
->assigned
) {
798 assign
->assigned
= current
;
799 list_add_tail(&assign
->head
, &c
->head
);
803 current
= (c
->assigned
+ (1 << (64 - c
->length
)));
808 static void interface_update_prefix_assignments(struct device_prefix
*prefix
, bool setup
)
810 struct device_prefix_assignment
*c
;
811 struct interface
*iface
;
813 // Delete all assignments
814 while (!list_empty(&prefix
->assignments
)) {
815 c
= list_first_entry(&prefix
->assignments
,
816 struct device_prefix_assignment
, head
);
817 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
818 interface_set_prefix_address(c
, prefix
, iface
, false);
826 // End-of-assignment sentinel
827 c
= malloc(sizeof(*c
) + 1);
828 c
->assigned
= 1 << (64 - prefix
->length
);
831 c
->addr
= in6addr_any
;
832 list_add(&c
->head
, &prefix
->assignments
);
835 if (prefix
->excl_length
> 0) {
836 const char name
[] = "!excluded";
837 c
= malloc(sizeof(*c
) + sizeof(name
));
838 c
->assigned
= ntohl(prefix
->excl_addr
.s6_addr32
[1]) &
839 ((1 << (64 - prefix
->length
)) - 1);
840 c
->length
= prefix
->excl_length
;
841 c
->addr
= in6addr_any
;
842 memcpy(c
->name
, name
, sizeof(name
));
843 list_add(&c
->head
, &prefix
->assignments
);
846 bool assigned_any
= false;
847 struct list_head assign_later
= LIST_HEAD_INIT(assign_later
);
848 vlist_for_each_element(&interfaces
, iface
, node
) {
849 if (iface
->assignment_length
< 48 ||
850 iface
->assignment_length
> 64)
853 // Test whether there is a matching class
854 if (!list_empty(&iface
->assignment_classes
)) {
857 struct interface_assignment_class
*c
;
858 list_for_each_entry(c
, &iface
->assignment_classes
, head
) {
859 if (!strcmp(c
->name
, prefix
->pclass
)) {
869 size_t namelen
= strlen(iface
->name
) + 1;
870 c
= malloc(sizeof(*c
) + namelen
);
871 c
->length
= iface
->assignment_length
;
872 c
->assigned
= iface
->assignment_hint
;
873 c
->addr
= in6addr_any
;
875 memcpy(c
->name
, iface
->name
, namelen
);
877 // First process all custom assignments, put all others in later-list
878 if (c
->assigned
== -1 || !interface_prefix_assign(&prefix
->assignments
, c
)) {
879 if (c
->assigned
!= -1) {
881 netifd_log_message(L_WARNING
, "Failed to assign requested subprefix "
882 "of size %hhu for %s, trying other\n", c
->length
, c
->name
);
885 struct list_head
*next
= &assign_later
;
886 struct device_prefix_assignment
*n
;
887 list_for_each_entry(n
, &assign_later
, head
) {
888 if (n
->length
< c
->length
) {
893 list_add_tail(&c
->head
, next
);
896 if (c
->assigned
!= -1)
900 // Then try to assign all other + failed custom assignments
901 while (!list_empty(&assign_later
)) {
902 c
= list_first_entry(&assign_later
, struct device_prefix_assignment
, head
);
905 bool assigned
= false;
907 assigned
= interface_prefix_assign(&prefix
->assignments
, c
);
908 } while (!assigned
&& ++c
->length
<= 64);
911 netifd_log_message(L_WARNING
, "Failed to assign subprefix "
912 "of size %hhu for %s\n", c
->length
, c
->name
);
919 list_for_each_entry(c
, &prefix
->assignments
, head
)
920 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
921 interface_set_prefix_address(c
, prefix
, iface
, true);
924 netifd_log_message(L_WARNING
, "You have delegated IPv6-prefixes but haven't assigned them "
925 "to any interface. Did you forget to set option ip6assign on your lan-interfaces?");
929 void interface_refresh_assignments(bool hint
)
931 static bool refresh
= false;
932 if (!hint
&& refresh
) {
933 struct device_prefix
*p
;
934 list_for_each_entry(p
, &prefixes
, head
)
935 interface_update_prefix_assignments(p
, true);
942 interface_update_prefix(struct vlist_tree
*tree
,
943 struct vlist_node
*node_new
,
944 struct vlist_node
*node_old
)
946 struct device_prefix
*prefix_old
, *prefix_new
;
947 prefix_old
= container_of(node_old
, struct device_prefix
, node
);
948 prefix_new
= container_of(node_new
, struct device_prefix
, node
);
950 struct interface_ip_settings
*ip
= container_of(tree
, struct interface_ip_settings
, prefix
);
951 if (tree
&& (!node_new
|| !node_old
))
952 ip
->iface
->updated
|= IUF_PREFIX
;
954 struct device_route route
;
955 memset(&route
, 0, sizeof(route
));
956 route
.flags
= DEVADDR_INET6
;
957 route
.metric
= INT32_MAX
;
958 route
.mask
= (node_new
) ? prefix_new
->length
: prefix_old
->length
;
959 route
.addr
.in6
= (node_new
) ? prefix_new
->addr
: prefix_old
->addr
;
962 struct device_prefix_assignment
*c
;
963 struct interface
*iface
;
965 if (node_old
&& node_new
) {
966 // Move assignments and refresh addresses to update valid times
967 list_splice(&prefix_old
->assignments
, &prefix_new
->assignments
);
969 list_for_each_entry(c
, &prefix_new
->assignments
, head
)
970 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
971 interface_set_prefix_address(c
, prefix_new
, iface
, true);
972 } else if (node_new
) {
973 // Set null-route to avoid routing loops
974 system_add_route(NULL
, &route
);
976 if (!prefix_new
->iface
|| !prefix_new
->iface
->proto_ip
.no_delegation
)
977 interface_update_prefix_assignments(prefix_new
, true);
978 } else if (node_old
) {
980 interface_update_prefix_assignments(prefix_old
, false);
981 system_del_route(NULL
, &route
);
985 if (prefix_old
->head
.next
)
986 list_del(&prefix_old
->head
);
990 if (node_new
&& (!prefix_new
->iface
|| !prefix_new
->iface
->proto_ip
.no_delegation
))
991 list_add(&prefix_new
->head
, &prefixes
);
995 struct device_prefix
*
996 interface_ip_add_device_prefix(struct interface
*iface
, struct in6_addr
*addr
,
997 uint8_t length
, time_t valid_until
, time_t preferred_until
,
998 struct in6_addr
*excl_addr
, uint8_t excl_length
, const char *pclass
)
1001 pclass
= (iface
) ? iface
->name
: "local";
1003 struct device_prefix
*prefix
= calloc(1, sizeof(*prefix
) + strlen(pclass
) + 1);
1004 prefix
->length
= length
;
1005 prefix
->addr
= *addr
;
1006 prefix
->preferred_until
= preferred_until
;
1007 prefix
->valid_until
= valid_until
;
1008 prefix
->iface
= iface
;
1009 INIT_LIST_HEAD(&prefix
->assignments
);
1012 prefix
->excl_addr
= *excl_addr
;
1013 prefix
->excl_length
= excl_length
;
1016 strcpy(prefix
->pclass
, pclass
);
1019 vlist_add(&iface
->proto_ip
.prefix
, &prefix
->node
, &prefix
->addr
);
1021 interface_update_prefix(NULL
, &prefix
->node
, NULL
);
1027 interface_ip_set_ula_prefix(const char *prefix
)
1029 char buf
[INET6_ADDRSTRLEN
+ 4] = {0}, *saveptr
;
1031 strncpy(buf
, prefix
, sizeof(buf
) - 1);
1032 char *prefixaddr
= strtok_r(buf
, "/", &saveptr
);
1034 struct in6_addr addr
;
1035 if (!prefixaddr
|| inet_pton(AF_INET6
, prefixaddr
, &addr
) < 1) {
1037 interface_update_prefix(NULL
, NULL
, &ula_prefix
->node
);
1044 char *prefixlen
= strtok_r(NULL
, ",", &saveptr
);
1045 if (!prefixlen
|| (length
= atoi(prefixlen
)) < 1 || length
> 64)
1048 if (!ula_prefix
|| !IN6_ARE_ADDR_EQUAL(&addr
, &ula_prefix
->addr
) ||
1049 ula_prefix
->length
!= length
) {
1051 interface_update_prefix(NULL
, NULL
, &ula_prefix
->node
);
1053 ula_prefix
= interface_ip_add_device_prefix(NULL
, &addr
, length
,
1054 0, 0, NULL
, 0, NULL
);
1059 interface_add_dns_server(struct interface_ip_settings
*ip
, const char *str
)
1061 struct dns_server
*s
;
1063 s
= calloc(1, sizeof(*s
));
1068 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
1072 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
1079 D(INTERFACE
, "Add IPv%c DNS server: %s\n",
1080 s
->af
== AF_INET6
? '6' : '4', str
);
1081 vlist_simple_add(&ip
->dns_servers
, &s
->node
);
1085 interface_add_dns_server_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
1087 struct blob_attr
*cur
;
1090 blobmsg_for_each_attr(cur
, list
, rem
) {
1091 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
1094 if (!blobmsg_check_attr(cur
, NULL
))
1097 interface_add_dns_server(ip
, blobmsg_data(cur
));
1102 interface_add_dns_search_domain(struct interface_ip_settings
*ip
, const char *str
)
1104 struct dns_search_domain
*s
;
1105 int len
= strlen(str
);
1107 s
= calloc(1, sizeof(*s
) + len
+ 1);
1111 D(INTERFACE
, "Add DNS search domain: %s\n", str
);
1112 memcpy(s
->name
, str
, len
);
1113 vlist_simple_add(&ip
->dns_search
, &s
->node
);
1117 interface_add_dns_search_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
1119 struct blob_attr
*cur
;
1122 blobmsg_for_each_attr(cur
, list
, rem
) {
1123 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
1126 if (!blobmsg_check_attr(cur
, NULL
))
1129 interface_add_dns_search_domain(ip
, blobmsg_data(cur
));
1134 write_resolv_conf_entries(FILE *f
, struct interface_ip_settings
*ip
, const char *dev
)
1136 struct dns_server
*s
;
1137 struct dns_search_domain
*d
;
1139 char buf
[INET6_ADDRSTRLEN
];
1141 vlist_simple_for_each_element(&ip
->dns_servers
, s
, node
) {
1142 str
= inet_ntop(s
->af
, &s
->addr
, buf
, sizeof(buf
));
1146 if (s
->af
== AF_INET6
&& IN6_IS_ADDR_LINKLOCAL(&s
->addr
.in6
))
1147 fprintf(f
, "nameserver %s%%%s\n", str
, dev
);
1149 fprintf(f
, "nameserver %s\n", str
);
1152 vlist_simple_for_each_element(&ip
->dns_search
, d
, node
) {
1153 fprintf(f
, "search %s\n", d
->name
);
1158 interface_write_resolv_conf(void)
1160 struct interface
*iface
;
1161 char *path
= alloca(strlen(resolv_conf
) + 5);
1163 uint32_t crcold
, crcnew
;
1165 sprintf(path
, "%s.tmp", resolv_conf
);
1167 f
= fopen(path
, "w+");
1169 D(INTERFACE
, "Failed to open %s for writing\n", path
);
1173 vlist_for_each_element(&interfaces
, iface
, node
) {
1174 if (iface
->state
!= IFS_UP
)
1177 if (vlist_simple_empty(&iface
->proto_ip
.dns_search
) &&
1178 vlist_simple_empty(&iface
->proto_ip
.dns_servers
) &&
1179 vlist_simple_empty(&iface
->config_ip
.dns_search
) &&
1180 vlist_simple_empty(&iface
->config_ip
.dns_servers
))
1183 fprintf(f
, "# Interface %s\n", iface
->name
);
1184 write_resolv_conf_entries(f
, &iface
->config_ip
, iface
->ifname
);
1185 if (!iface
->proto_ip
.no_dns
)
1186 write_resolv_conf_entries(f
, &iface
->proto_ip
, iface
->ifname
);
1190 crcnew
= crc32_file(f
);
1193 crcold
= crcnew
+ 1;
1194 f
= fopen(resolv_conf
, "r");
1196 crcold
= crc32_file(f
);
1200 if (crcold
== crcnew
) {
1202 } else if (rename(path
, resolv_conf
) < 0) {
1203 D(INTERFACE
, "Failed to replace %s\n", resolv_conf
);
1208 void interface_ip_set_enabled(struct interface_ip_settings
*ip
, bool enabled
)
1210 struct device_addr
*addr
;
1211 struct device_route
*route
;
1213 struct interface
*iface
;
1215 ip
->enabled
= enabled
;
1217 dev
= iface
->l3_dev
.dev
;
1221 vlist_for_each_element(&ip
->addr
, addr
, node
) {
1222 bool v6
= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
) ? true : false;
1224 if (addr
->enabled
== enabled
)
1228 system_add_address(dev
, addr
);
1230 interface_handle_subnet_route(iface
, addr
, true);
1232 addr
->policy_table
= (v6
) ? iface
->ip6table
: iface
->ip4table
;
1233 if (addr
->policy_table
)
1234 set_ip_source_policy(true, v6
, IPRULE_PRIORITY_ADDR
, &addr
->addr
,
1235 (v6
) ? 128 : 32, addr
->policy_table
, NULL
, NULL
);
1237 interface_handle_subnet_route(iface
, addr
, false);
1238 system_del_address(dev
, addr
);
1240 if (addr
->policy_table
)
1241 set_ip_source_policy(false, v6
, IPRULE_PRIORITY_ADDR
, &addr
->addr
,
1242 (v6
) ? 128 : 32, addr
->policy_table
, NULL
, NULL
);
1244 addr
->enabled
= enabled
;
1247 vlist_for_each_element(&ip
->route
, route
, node
) {
1248 bool _enabled
= enabled
;
1250 if (!enable_route(ip
, route
))
1253 if (route
->enabled
== _enabled
)
1257 if (!(route
->flags
& DEVROUTE_METRIC
))
1258 route
->metric
= ip
->iface
->metric
;
1260 if (!(route
->flags
& DEVROUTE_TABLE
)) {
1261 route
->flags
&= ~DEVROUTE_SRCTABLE
;
1262 route
->table
= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
) ?
1263 iface
->ip6table
: iface
->ip4table
;
1266 route
->flags
|= DEVROUTE_SRCTABLE
;
1269 if (system_add_route(dev
, route
))
1270 route
->failed
= true;
1272 system_del_route(dev
, route
);
1273 route
->enabled
= _enabled
;
1276 struct device_prefix
*c
;
1277 struct device_prefix_assignment
*a
;
1278 list_for_each_entry(c
, &prefixes
, head
)
1279 list_for_each_entry(a
, &c
->assignments
, head
)
1280 if (!strcmp(a
->name
, ip
->iface
->name
))
1281 interface_set_prefix_address(a
, c
, ip
->iface
, enabled
);
1283 if (ip
->iface
&& ip
->iface
->l3_dev
.dev
) {
1284 set_ip_lo_policy(enabled
, true, ip
->iface
);
1285 set_ip_lo_policy(enabled
, false, ip
->iface
);
1287 set_ip_source_policy(enabled
, true, IPRULE_PRIORITY_REJECT
+ ip
->iface
->l3_dev
.dev
->ifindex
,
1288 NULL
, 0, 0, ip
->iface
, "failed_policy");
1293 interface_ip_update_start(struct interface_ip_settings
*ip
)
1295 if (ip
!= &ip
->iface
->config_ip
) {
1296 vlist_simple_update(&ip
->dns_servers
);
1297 vlist_simple_update(&ip
->dns_search
);
1299 vlist_update(&ip
->route
);
1300 vlist_update(&ip
->addr
);
1301 vlist_update(&ip
->prefix
);
1305 interface_ip_update_complete(struct interface_ip_settings
*ip
)
1307 vlist_simple_flush(&ip
->dns_servers
);
1308 vlist_simple_flush(&ip
->dns_search
);
1309 vlist_flush(&ip
->route
);
1310 vlist_flush(&ip
->addr
);
1311 vlist_flush(&ip
->prefix
);
1312 interface_write_resolv_conf();
1316 interface_ip_flush(struct interface_ip_settings
*ip
)
1318 if (ip
== &ip
->iface
->proto_ip
)
1319 vlist_flush_all(&ip
->iface
->host_routes
);
1320 vlist_simple_flush_all(&ip
->dns_servers
);
1321 vlist_simple_flush_all(&ip
->dns_search
);
1322 vlist_flush_all(&ip
->route
);
1323 vlist_flush_all(&ip
->addr
);
1324 vlist_flush_all(&ip
->prefix
);
1328 __interface_ip_init(struct interface_ip_settings
*ip
, struct interface
*iface
)
1332 vlist_simple_init(&ip
->dns_search
, struct dns_search_domain
, node
);
1333 vlist_simple_init(&ip
->dns_servers
, struct dns_server
, node
);
1334 vlist_init(&ip
->route
, route_cmp
, interface_update_proto_route
);
1335 vlist_init(&ip
->addr
, addr_cmp
, interface_update_proto_addr
);
1336 vlist_init(&ip
->prefix
, prefix_cmp
, interface_update_prefix
);
1340 interface_ip_init(struct interface
*iface
)
1342 __interface_ip_init(&iface
->proto_ip
, iface
);
1343 __interface_ip_init(&iface
->config_ip
, iface
);
1344 vlist_init(&iface
->host_routes
, route_cmp
, interface_update_host_route
);
1348 interface_ip_valid_until_handler(struct uloop_timeout
*t
)
1350 time_t now
= system_get_rtime();
1351 struct interface
*iface
;
1352 vlist_for_each_element(&interfaces
, iface
, node
) {
1353 if (iface
->state
!= IFS_UP
)
1356 struct device_addr
*addr
, *addrp
;
1357 struct device_route
*route
, *routep
;
1358 struct device_prefix
*pref
, *prefp
;
1360 vlist_for_each_element_safe(&iface
->proto_ip
.addr
, addr
, node
, addrp
)
1361 if (addr
->valid_until
&& addr
->valid_until
< now
)
1362 vlist_delete(&iface
->proto_ip
.addr
, &addr
->node
);
1364 vlist_for_each_element_safe(&iface
->proto_ip
.route
, route
, node
, routep
)
1365 if (route
->valid_until
&& route
->valid_until
< now
)
1366 vlist_delete(&iface
->proto_ip
.route
, &route
->node
);
1368 vlist_for_each_element_safe(&iface
->proto_ip
.prefix
, pref
, node
, prefp
)
1369 if (pref
->valid_until
&& pref
->valid_until
< now
)
1370 vlist_delete(&iface
->proto_ip
.prefix
, &pref
->node
);
1374 uloop_timeout_set(t
, 1000);
1378 interface_ip_init_worker(void)
1380 valid_until_timeout
.cb
= interface_ip_valid_until_handler
;
1381 uloop_timeout_set(&valid_until_timeout
, 1000);