2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2012 Steven Barth <steven@midlink.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
20 #include <arpa/inet.h>
24 #include "interface.h"
25 #include "interface-ip.h"
42 static const struct blobmsg_policy route_attr
[__ROUTE_MAX
] = {
43 [ROUTE_INTERFACE
] = { .name
= "interface", .type
= BLOBMSG_TYPE_STRING
},
44 [ROUTE_TARGET
] = { .name
= "target", .type
= BLOBMSG_TYPE_STRING
},
45 [ROUTE_MASK
] = { .name
= "netmask", .type
= BLOBMSG_TYPE_STRING
},
46 [ROUTE_GATEWAY
] = { .name
= "gateway", .type
= BLOBMSG_TYPE_STRING
},
47 [ROUTE_METRIC
] = { .name
= "metric", .type
= BLOBMSG_TYPE_INT32
},
48 [ROUTE_MTU
] = { .name
= "mtu", .type
= BLOBMSG_TYPE_INT32
},
49 [ROUTE_TABLE
] = { .name
= "table", .type
= BLOBMSG_TYPE_STRING
},
50 [ROUTE_VALID
] = { .name
= "valid", .type
= BLOBMSG_TYPE_INT32
},
53 const struct config_param_list route_attr_list
= {
54 .n_params
= __ROUTE_MAX
,
59 struct list_head prefixes
= LIST_HEAD_INIT(prefixes
);
60 static struct device_prefix
*ula_prefix
= NULL
;
61 static struct uloop_timeout valid_until_timeout
;
65 clear_if_addr(union if_addr
*a
, int mask
)
67 int m_bytes
= (mask
+ 7) / 8;
68 uint8_t m_clear
= (1 << (m_bytes
* 8 - mask
)) - 1;
69 uint8_t *p
= (uint8_t *) a
;
71 if (m_bytes
< sizeof(a
))
72 memset(p
+ m_bytes
, 0, sizeof(a
) - m_bytes
);
74 p
[m_bytes
- 1] &= ~m_clear
;
78 match_if_addr(union if_addr
*a1
, union if_addr
*a2
, int mask
)
80 union if_addr
*p1
, *p2
;
82 p1
= alloca(sizeof(*a1
));
83 p2
= alloca(sizeof(*a2
));
85 memcpy(p1
, a1
, sizeof(*a1
));
86 clear_if_addr(p1
, mask
);
87 memcpy(p2
, a2
, sizeof(*a2
));
88 clear_if_addr(p2
, mask
);
90 return !memcmp(p1
, p2
, sizeof(*p1
));
93 static int set_ipv6_source_policy(bool add
, const union if_addr
*addr
, uint8_t mask
, int ifindex
)
95 struct iprule rule
= {
96 .flags
= IPRULE_INET6
| IPRULE_SRC
| IPRULE_LOOKUP
| IPRULE_PRIORITY
,
98 .lookup
= interface_ip_resolve_v6_rtable(ifindex
),
103 return (add
) ? system_add_iprule(&rule
) : system_del_iprule(&rule
);
106 static int set_ipv6_lo_policy(bool add
, int ifindex
)
108 struct iprule rule
= {
109 .flags
= IPRULE_INET6
| IPRULE_IN
| IPRULE_LOOKUP
| IPRULE_PRIORITY
,
111 .lookup
= interface_ip_resolve_v6_rtable(ifindex
),
115 return (add
) ? system_add_iprule(&rule
) : system_del_iprule(&rule
);
119 __find_ip_addr_target(struct interface_ip_settings
*ip
, union if_addr
*a
, bool v6
)
121 struct device_addr
*addr
;
123 vlist_for_each_element(&ip
->addr
, addr
, node
) {
127 if (v6
!= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
))
130 // Handle offlink addresses correctly
131 unsigned int mask
= addr
->mask
;
132 if ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
&&
133 (addr
->flags
& DEVADDR_OFFLINK
))
136 if (!match_if_addr(&addr
->addr
, a
, mask
))
146 __find_ip_route_target(struct interface_ip_settings
*ip
, union if_addr
*a
,
147 bool v6
, struct device_route
**res
)
149 struct device_route
*route
;
151 vlist_for_each_element(&ip
->route
, route
, node
) {
155 if (v6
!= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
))
158 if (!match_if_addr(&route
->addr
, a
, route
->mask
))
161 if (route
->flags
& DEVROUTE_TABLE
)
164 if (!*res
|| route
->mask
< (*res
)->mask
)
170 interface_ip_find_addr_target(struct interface
*iface
, union if_addr
*a
, bool v6
)
172 return __find_ip_addr_target(&iface
->proto_ip
, a
, v6
) ||
173 __find_ip_addr_target(&iface
->config_ip
, a
, v6
);
177 interface_ip_find_route_target(struct interface
*iface
, union if_addr
*a
,
178 bool v6
, struct device_route
**route
)
180 __find_ip_route_target(&iface
->proto_ip
, a
, v6
, route
);
181 __find_ip_route_target(&iface
->config_ip
, a
, v6
, route
);
185 interface_ip_add_target_route(union if_addr
*addr
, bool v6
, struct interface
*iface
)
187 struct device_route
*route
, *r_next
= NULL
;
188 bool defaultroute_target
= false;
189 int addrsize
= v6
? sizeof(addr
->in6
) : sizeof(addr
->in
);
191 route
= calloc(1, sizeof(*route
));
195 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
196 route
->mask
= v6
? 128 : 32;
197 if (memcmp(&route
->addr
, addr
, addrsize
) == 0)
198 defaultroute_target
= true;
200 memcpy(&route
->addr
, addr
, addrsize
);
203 /* look for locally addressable target first */
204 if (interface_ip_find_addr_target(iface
, addr
, v6
))
207 /* do not stop at the first route, let the lookup compare
208 * masks to find the best match */
209 interface_ip_find_route_target(iface
, addr
, v6
, &r_next
);
211 vlist_for_each_element(&interfaces
, iface
, node
) {
212 /* look for locally addressable target first */
213 if (interface_ip_find_addr_target(iface
, addr
, v6
))
216 /* do not stop at the first route, let the lookup compare
217 * masks to find the best match */
218 interface_ip_find_route_target(iface
, addr
, v6
, &r_next
);
227 iface
= r_next
->iface
;
228 memcpy(&route
->nexthop
, &r_next
->nexthop
, sizeof(route
->nexthop
));
229 route
->mtu
= r_next
->mtu
;
230 route
->metric
= r_next
->metric
;
231 route
->table
= r_next
->table
;
234 route
->iface
= iface
;
235 if (defaultroute_target
)
238 vlist_add(&iface
->host_routes
, &route
->node
, route
);
243 interface_ip_add_route(struct interface
*iface
, struct blob_attr
*attr
, bool v6
)
245 struct interface_ip_settings
*ip
;
246 struct blob_attr
*tb
[__ROUTE_MAX
], *cur
;
247 struct device_route
*route
;
248 int af
= v6
? AF_INET6
: AF_INET
;
249 bool is_v6_proto_route
= v6
&& iface
;
251 blobmsg_parse(route_attr
, __ROUTE_MAX
, tb
, blobmsg_data(attr
), blobmsg_data_len(attr
));
254 if ((cur
= tb
[ROUTE_INTERFACE
]) == NULL
)
257 iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
261 ip
= &iface
->config_ip
;
263 ip
= &iface
->proto_ip
;
266 route
= calloc(1, sizeof(*route
));
270 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
271 route
->mask
= v6
? 128 : 32;
272 if ((cur
= tb
[ROUTE_MASK
]) != NULL
) {
273 route
->mask
= parse_netmask_string(blobmsg_data(cur
), v6
);
274 if (route
->mask
> (v6
? 128 : 32))
278 if ((cur
= tb
[ROUTE_TARGET
]) != NULL
) {
279 if (!parse_ip_and_netmask(af
, blobmsg_data(cur
), &route
->addr
, &route
->mask
)) {
280 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur
));
285 if ((cur
= tb
[ROUTE_GATEWAY
]) != NULL
) {
286 if (!inet_pton(af
, blobmsg_data(cur
), &route
->nexthop
)) {
287 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur
));
292 if ((cur
= tb
[ROUTE_METRIC
]) != NULL
) {
293 route
->metric
= blobmsg_get_u32(cur
);
294 route
->flags
|= DEVROUTE_METRIC
;
297 if ((cur
= tb
[ROUTE_MTU
]) != NULL
) {
298 route
->mtu
= blobmsg_get_u32(cur
);
299 route
->flags
|= DEVROUTE_MTU
;
302 // Use source-based routing
303 if (is_v6_proto_route
) {
304 route
->table
= interface_ip_resolve_v6_rtable(iface
->l3_dev
.dev
->ifindex
);
305 route
->flags
|= DEVROUTE_SRCTABLE
;
308 if ((cur
= tb
[ROUTE_TABLE
]) != NULL
) {
309 if (!system_resolve_rt_table(blobmsg_data(cur
), &route
->table
)) {
310 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur
));
315 route
->flags
|= DEVROUTE_TABLE
;
318 if ((cur
= tb
[ROUTE_VALID
]) != NULL
)
319 route
->valid_until
= system_get_rtime() + blobmsg_get_u32(cur
);
321 vlist_add(&ip
->route
, &route
->node
, route
);
329 addr_cmp(const void *k1
, const void *k2
, void *ptr
)
331 return memcmp(k1
, k2
, sizeof(struct device_addr
) -
332 offsetof(struct device_addr
, flags
));
336 route_cmp(const void *k1
, const void *k2
, void *ptr
)
338 const struct device_route
*r1
= k1
, *r2
= k2
;
340 if (r1
->mask
!= r2
->mask
)
341 return r2
->mask
- r1
->mask
;
343 if (r1
->metric
!= r2
->metric
)
344 return r1
->metric
- r2
->metric
;
346 if (r1
->flags
!= r2
->flags
)
347 return r2
->flags
- r1
->flags
;
349 return memcmp(&r1
->addr
, &r2
->addr
, sizeof(r1
->addr
));
353 prefix_cmp(const void *k1
, const void *k2
, void *ptr
)
355 return memcmp(k1
, k2
, sizeof(struct device_prefix
) -
356 offsetof(struct device_prefix
, addr
));
360 interface_handle_subnet_route(struct interface
*iface
, struct device_addr
*addr
, bool add
)
362 struct device
*dev
= iface
->l3_dev
.dev
;
363 struct device_route route
;
365 memset(&route
, 0, sizeof(route
));
367 route
.flags
= addr
->flags
;
368 route
.mask
= addr
->mask
;
369 memcpy(&route
.addr
, &addr
->addr
, sizeof(route
.addr
));
370 clear_if_addr(&route
.addr
, route
.mask
);
373 route
.flags
|= DEVADDR_KERNEL
;
374 system_del_route(dev
, &route
);
376 if (!(addr
->flags
& DEVADDR_OFFLINK
)) {
377 route
.flags
&= ~DEVADDR_KERNEL
;
378 route
.metric
= iface
->metric
;
379 system_add_route(dev
, &route
);
382 if (!(addr
->flags
& DEVADDR_OFFLINK
))
383 system_del_route(dev
, &route
);
388 interface_update_proto_addr(struct vlist_tree
*tree
,
389 struct vlist_node
*node_new
,
390 struct vlist_node
*node_old
)
392 struct interface_ip_settings
*ip
;
393 struct interface
*iface
;
395 struct device_addr
*a_new
= NULL
, *a_old
= NULL
;
398 ip
= container_of(tree
, struct interface_ip_settings
, addr
);
400 dev
= iface
->l3_dev
.dev
;
403 a_new
= container_of(node_new
, struct device_addr
, node
);
405 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
409 uint32_t *a
= (uint32_t *) &a_new
->addr
;
411 mask
>>= a_new
->mask
;
412 a_new
->broadcast
= *a
| htonl(mask
);
417 a_old
= container_of(node_old
, struct device_addr
, node
);
419 if (a_new
&& a_old
) {
422 if (a_old
->flags
!= a_new
->flags
||
423 a_old
->valid_until
!= a_new
->valid_until
||
424 a_old
->preferred_until
!= a_new
->preferred_until
)
427 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
428 a_new
->broadcast
!= a_old
->broadcast
)
433 if (!(a_old
->flags
& DEVADDR_EXTERNAL
) && a_old
->enabled
&& !keep
) {
434 interface_handle_subnet_route(iface
, a_old
, false);
436 if ((a_old
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
)
437 set_ipv6_source_policy(false, &a_old
->addr
, a_old
->mask
, dev
->ifindex
);
439 system_del_address(dev
, a_old
);
445 a_new
->enabled
= true;
446 if (!(a_new
->flags
& DEVADDR_EXTERNAL
) && !keep
) {
447 system_add_address(dev
, a_new
);
449 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
)
450 set_ipv6_source_policy(true, &a_new
->addr
, a_new
->mask
, dev
->ifindex
);
452 if ((a_new
->flags
& DEVADDR_OFFLINK
) || iface
->metric
)
453 interface_handle_subnet_route(iface
, a_new
, true);
459 enable_route(struct interface_ip_settings
*ip
, struct device_route
*route
)
461 if (ip
->no_defaultroute
&& !route
->mask
)
468 interface_update_proto_route(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_route
*route_old
, *route_new
;
478 ip
= container_of(tree
, struct interface_ip_settings
, route
);
480 dev
= iface
->l3_dev
.dev
;
482 route_old
= container_of(node_old
, struct device_route
, node
);
483 route_new
= container_of(node_new
, struct device_route
, node
);
485 if (node_old
&& node_new
)
486 keep
= !memcmp(&route_old
->nexthop
, &route_new
->nexthop
, sizeof(route_old
->nexthop
));
489 if (!(route_old
->flags
& DEVADDR_EXTERNAL
) && route_old
->enabled
&& !keep
)
490 system_del_route(dev
, route_old
);
495 bool _enabled
= enable_route(ip
, route_new
);
497 if (!(route_new
->flags
& DEVROUTE_METRIC
))
498 route_new
->metric
= iface
->metric
;
500 if (!(route_new
->flags
& DEVADDR_EXTERNAL
) && !keep
&& _enabled
)
501 system_add_route(dev
, route_new
);
503 route_new
->iface
= iface
;
504 route_new
->enabled
= _enabled
;
509 interface_update_host_route(struct vlist_tree
*tree
,
510 struct vlist_node
*node_new
,
511 struct vlist_node
*node_old
)
513 struct interface
*iface
;
515 struct device_route
*route_old
, *route_new
;
517 iface
= container_of(tree
, struct interface
, host_routes
);
518 dev
= iface
->l3_dev
.dev
;
520 route_old
= container_of(node_old
, struct device_route
, node
);
521 route_new
= container_of(node_new
, struct device_route
, node
);
524 system_del_route(dev
, route_old
);
529 system_add_route(dev
, route_new
);
534 interface_set_prefix_address(struct device_prefix_assignment
*assignment
,
535 const struct device_prefix
*prefix
, struct interface
*iface
, bool add
);
537 static void interface_trigger_ula_prefix(struct interface
*iface
,
538 const struct device_prefix
*prefix
, bool enable
)
540 if (prefix
== ula_prefix
|| (prefix
->addr
.s6_addr
[0] & 0xfe) != 0xfc)
543 bool external_ula
= false;
544 struct device_prefix_assignment
*ula_assign
= NULL
;
545 struct device_prefix
*c
;
546 list_for_each_entry(c
, &prefixes
, head
) {
547 if (c
!= ula_prefix
&& (c
->addr
.s6_addr
[0] & 0xfe) != 0xfc)
550 struct device_prefix_assignment
*a
;
551 list_for_each_entry(a
, &c
->assignments
, head
) {
552 if (!strcmp(a
->name
, iface
->name
)) {
562 // Remove ULA assignment if there is an externally managed ULA and vice versa
563 if (ula_assign
&& ((enable
&& !external_ula
) || (!enable
&& external_ula
)))
564 interface_set_prefix_address(ula_assign
, ula_prefix
, iface
, enable
);
569 interface_set_prefix_address(struct device_prefix_assignment
*assignment
,
570 const struct device_prefix
*prefix
, struct interface
*iface
, bool add
)
572 const struct interface
*uplink
= prefix
->iface
;
573 if (!iface
->l3_dev
.dev
)
576 struct device
*l3_downlink
= iface
->l3_dev
.dev
;
578 struct device_addr addr
;
579 memset(&addr
, 0, sizeof(addr
));
580 addr
.addr
.in6
= prefix
->addr
;
581 addr
.addr
.in6
.s6_addr32
[1] |= htonl(assignment
->assigned
);
582 addr
.addr
.in6
.s6_addr
[15] += 1;
583 addr
.mask
= assignment
->length
;
584 addr
.flags
= DEVADDR_INET6
;
585 addr
.preferred_until
= prefix
->preferred_until
;
586 addr
.valid_until
= prefix
->valid_until
;
588 if (!add
&& assignment
->enabled
) {
589 time_t now
= system_get_rtime();
590 addr
.preferred_until
= now
;
591 if (!addr
.valid_until
|| addr
.valid_until
- now
> 7200)
592 addr
.valid_until
= now
+ 7200;
593 system_add_address(l3_downlink
, &addr
);
594 assignment
->enabled
= false;
596 interface_trigger_ula_prefix(iface
, prefix
, true);
597 } else if (add
&& (iface
->state
== IFS_UP
|| iface
->state
== IFS_SETUP
)) {
598 system_add_address(l3_downlink
, &addr
);
599 if (uplink
&& uplink
->l3_dev
.dev
) {
600 int mtu
= system_update_ipv6_mtu(
601 uplink
->l3_dev
.dev
, 0);
603 system_update_ipv6_mtu(l3_downlink
, mtu
);
605 assignment
->enabled
= true;
607 interface_trigger_ula_prefix(iface
, prefix
, false);
611 static bool interface_prefix_assign(struct list_head
*list
,
612 struct device_prefix_assignment
*assign
)
614 int32_t current
= 0, asize
= (1 << (64 - assign
->length
)) - 1;
615 struct device_prefix_assignment
*c
;
616 list_for_each_entry(c
, list
, head
) {
617 if (assign
->assigned
!= -1) {
618 if (assign
->assigned
> current
&& assign
->assigned
+ asize
< c
->assigned
) {
619 list_add_tail(&assign
->head
, &c
->head
);
622 } else if (assign
->assigned
== -1) {
623 current
= (current
+ asize
) & (~asize
);
624 if (current
+ asize
< c
->assigned
) {
625 assign
->assigned
= current
;
626 list_add_tail(&assign
->head
, &c
->head
);
630 current
= (c
->assigned
+ (1 << (64 - c
->length
)));
635 static void interface_update_prefix_assignments(struct device_prefix
*prefix
, bool setup
)
637 struct device_prefix_assignment
*c
;
638 struct interface
*iface
;
640 // Delete all assignments
641 while (!list_empty(&prefix
->assignments
)) {
642 c
= list_first_entry(&prefix
->assignments
,
643 struct device_prefix_assignment
, head
);
644 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
645 interface_set_prefix_address(c
, prefix
, iface
, false);
653 // End-of-assignment sentinel
654 c
= malloc(sizeof(*c
) + 1);
655 c
->assigned
= 1 << (64 - prefix
->length
);
658 list_add(&c
->head
, &prefix
->assignments
);
661 if (prefix
->excl_length
> 0) {
662 const char name
[] = "!excluded";
663 c
= malloc(sizeof(*c
) + sizeof(name
));
664 c
->assigned
= ntohl(prefix
->excl_addr
.s6_addr32
[1]) &
665 ((1 << (64 - prefix
->length
)) - 1);
666 c
->length
= prefix
->excl_length
;
667 memcpy(c
->name
, name
, sizeof(name
));
668 list_add(&c
->head
, &prefix
->assignments
);
671 struct list_head assign_later
= LIST_HEAD_INIT(assign_later
);
672 vlist_for_each_element(&interfaces
, iface
, node
) {
673 if (iface
->config_ip
.assignment_length
< 48 ||
674 iface
->config_ip
.assignment_length
> 64)
677 size_t namelen
= strlen(iface
->name
) + 1;
678 c
= malloc(sizeof(*c
) + namelen
);
679 c
->length
= iface
->config_ip
.assignment_length
;
680 c
->assigned
= iface
->config_ip
.assignment_hint
;
682 memcpy(c
->name
, iface
->name
, namelen
);
684 // First process all custom assignments, put all others in later-list
685 if (c
->assigned
== -1 || !interface_prefix_assign(&prefix
->assignments
, c
)) {
686 if (c
->assigned
!= -1) {
688 netifd_log_message(L_WARNING
, "Failed to assign requested subprefix "
689 "of size %hhu for %s, trying other\n", c
->length
, c
->name
);
691 list_add_tail(&c
->head
, &assign_later
);
695 // Then try to assign all other + failed custom assignments
696 while (!list_empty(&assign_later
)) {
697 c
= list_first_entry(&assign_later
, struct device_prefix_assignment
, head
);
700 bool assigned
= false;
702 assigned
= interface_prefix_assign(&prefix
->assignments
, c
);
703 } while (!assigned
&& ++c
->length
<= 64);
706 netifd_log_message(L_WARNING
, "Failed to assign subprefix "
707 "of size %hhu for %s\n", c
->length
, c
->name
);
712 list_for_each_entry(c
, &prefix
->assignments
, head
)
713 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
714 interface_set_prefix_address(c
, prefix
, iface
, true);
718 void interface_refresh_assignments(bool hint
)
720 static bool refresh
= false;
721 if (!hint
&& refresh
) {
722 struct device_prefix
*p
;
723 list_for_each_entry(p
, &prefixes
, head
)
724 interface_update_prefix_assignments(p
, true);
731 interface_update_prefix(struct vlist_tree
*tree
,
732 struct vlist_node
*node_new
,
733 struct vlist_node
*node_old
)
735 struct device_prefix
*prefix_old
, *prefix_new
;
736 prefix_old
= container_of(node_old
, struct device_prefix
, node
);
737 prefix_new
= container_of(node_new
, struct device_prefix
, node
);
739 struct device_route route
;
740 memset(&route
, 0, sizeof(route
));
741 route
.flags
= DEVADDR_INET6
;
742 route
.metric
= INT32_MAX
;
743 route
.mask
= (node_new
) ? prefix_new
->length
: prefix_old
->length
;
744 route
.addr
.in6
= (node_new
) ? prefix_new
->addr
: prefix_old
->addr
;
747 struct device_prefix_assignment
*c
;
748 struct interface
*iface
;
750 if (node_old
&& node_new
) {
751 // Move assignments and refresh addresses to update valid times
752 list_splice(&prefix_old
->assignments
, &prefix_new
->assignments
);
754 list_for_each_entry(c
, &prefix_new
->assignments
, head
)
755 if ((iface
= vlist_find(&interfaces
, c
->name
, iface
, node
)))
756 interface_set_prefix_address(c
, prefix_new
, iface
, true);
757 } else if (node_new
) {
758 // Set null-route to avoid routing loops and set routing policy
759 system_add_route(NULL
, &route
);
760 if (prefix_new
->iface
)
761 set_ipv6_source_policy(true, &route
.addr
, route
.mask
,
762 prefix_new
->iface
->l3_dev
.dev
->ifindex
);
765 interface_update_prefix_assignments(prefix_new
, true);
766 } else if (node_old
) {
767 interface_update_prefix_assignments(prefix_old
, false);
770 if (prefix_old
->iface
)
771 set_ipv6_source_policy(false, &route
.addr
, route
.mask
,
772 prefix_old
->iface
->l3_dev
.dev
->ifindex
);
773 system_del_route(NULL
, &route
);
777 list_del(&prefix_old
->head
);
782 list_add(&prefix_new
->head
, &prefixes
);
786 struct device_prefix
*
787 interface_ip_add_device_prefix(struct interface
*iface
, struct in6_addr
*addr
,
788 uint8_t length
, time_t valid_until
, time_t preferred_until
,
789 struct in6_addr
*excl_addr
, uint8_t excl_length
)
791 struct device_prefix
*prefix
= calloc(1, sizeof(*prefix
));
792 prefix
->length
= length
;
793 prefix
->addr
= *addr
;
794 prefix
->preferred_until
= preferred_until
;
795 prefix
->valid_until
= valid_until
;
796 prefix
->iface
= iface
;
797 INIT_LIST_HEAD(&prefix
->assignments
);
800 prefix
->excl_addr
= *excl_addr
;
801 prefix
->excl_length
= excl_length
;
805 vlist_add(&iface
->proto_ip
.prefix
, &prefix
->node
, &prefix
->addr
);
807 interface_update_prefix(NULL
, &prefix
->node
, NULL
);
813 interface_ip_set_ula_prefix(const char *prefix
)
815 char buf
[INET6_ADDRSTRLEN
+ 4] = {0}, *saveptr
;
817 strncpy(buf
, prefix
, sizeof(buf
) - 1);
818 char *prefixaddr
= strtok_r(buf
, "/", &saveptr
);
820 struct in6_addr addr
;
821 if (!prefixaddr
|| inet_pton(AF_INET6
, prefixaddr
, &addr
) < 1) {
823 interface_update_prefix(NULL
, NULL
, &ula_prefix
->node
);
830 char *prefixlen
= strtok_r(NULL
, ",", &saveptr
);
831 if (!prefixlen
|| (length
= atoi(prefixlen
)) < 1 || length
> 64)
834 if (!ula_prefix
|| !IN6_ARE_ADDR_EQUAL(&addr
, &ula_prefix
->addr
) ||
835 ula_prefix
->length
!= length
) {
837 interface_update_prefix(NULL
, NULL
, &ula_prefix
->node
);
839 ula_prefix
= interface_ip_add_device_prefix(NULL
, &addr
, length
,
844 int interface_ip_resolve_v6_rtable(int ifindex
)
846 return ifindex
+ 1000;
850 interface_add_dns_server(struct interface_ip_settings
*ip
, const char *str
)
852 struct dns_server
*s
;
854 s
= calloc(1, sizeof(*s
));
859 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
863 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
870 D(INTERFACE
, "Add IPv%c DNS server: %s\n",
871 s
->af
== AF_INET6
? '6' : '4', str
);
872 vlist_simple_add(&ip
->dns_servers
, &s
->node
);
876 interface_add_dns_server_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
878 struct blob_attr
*cur
;
881 blobmsg_for_each_attr(cur
, list
, rem
) {
882 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
885 if (!blobmsg_check_attr(cur
, NULL
))
888 interface_add_dns_server(ip
, blobmsg_data(cur
));
893 interface_add_dns_search_domain(struct interface_ip_settings
*ip
, const char *str
)
895 struct dns_search_domain
*s
;
896 int len
= strlen(str
);
898 s
= calloc(1, sizeof(*s
) + len
+ 1);
902 D(INTERFACE
, "Add DNS search domain: %s\n", str
);
903 memcpy(s
->name
, str
, len
);
904 vlist_simple_add(&ip
->dns_search
, &s
->node
);
908 interface_add_dns_search_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
910 struct blob_attr
*cur
;
913 blobmsg_for_each_attr(cur
, list
, rem
) {
914 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
917 if (!blobmsg_check_attr(cur
, NULL
))
920 interface_add_dns_search_domain(ip
, blobmsg_data(cur
));
925 write_resolv_conf_entries(FILE *f
, struct interface_ip_settings
*ip
)
927 struct dns_server
*s
;
928 struct dns_search_domain
*d
;
930 char buf
[INET6_ADDRSTRLEN
];
932 vlist_simple_for_each_element(&ip
->dns_servers
, s
, node
) {
933 str
= inet_ntop(s
->af
, &s
->addr
, buf
, sizeof(buf
));
937 fprintf(f
, "nameserver %s\n", str
);
940 vlist_simple_for_each_element(&ip
->dns_search
, d
, node
) {
941 fprintf(f
, "search %s\n", d
->name
);
946 interface_write_resolv_conf(void)
948 struct interface
*iface
;
949 char *path
= alloca(strlen(resolv_conf
) + 5);
951 uint32_t crcold
, crcnew
;
953 sprintf(path
, "%s.tmp", resolv_conf
);
955 f
= fopen(path
, "w+");
957 D(INTERFACE
, "Failed to open %s for writing\n", path
);
961 vlist_for_each_element(&interfaces
, iface
, node
) {
962 if (iface
->state
!= IFS_UP
)
965 if (vlist_simple_empty(&iface
->proto_ip
.dns_search
) &&
966 vlist_simple_empty(&iface
->proto_ip
.dns_servers
) &&
967 vlist_simple_empty(&iface
->config_ip
.dns_search
) &&
968 vlist_simple_empty(&iface
->config_ip
.dns_servers
))
971 fprintf(f
, "# Interface %s\n", iface
->name
);
972 write_resolv_conf_entries(f
, &iface
->config_ip
);
973 if (!iface
->proto_ip
.no_dns
)
974 write_resolv_conf_entries(f
, &iface
->proto_ip
);
978 crcnew
= crc32_file(f
);
982 f
= fopen(resolv_conf
, "r");
984 crcold
= crc32_file(f
);
988 if (crcold
== crcnew
) {
990 } else if (rename(path
, resolv_conf
) < 0) {
991 D(INTERFACE
, "Failed to replace %s\n", resolv_conf
);
996 void interface_ip_set_enabled(struct interface_ip_settings
*ip
, bool enabled
)
998 struct device_addr
*addr
;
999 struct device_route
*route
;
1002 ip
->enabled
= enabled
;
1003 dev
= ip
->iface
->l3_dev
.dev
;
1007 vlist_for_each_element(&ip
->addr
, addr
, node
) {
1008 if (addr
->enabled
== enabled
)
1012 system_add_address(dev
, addr
);
1014 system_del_address(dev
, addr
);
1015 addr
->enabled
= enabled
;
1018 vlist_for_each_element(&ip
->route
, route
, node
) {
1019 bool _enabled
= enabled
;
1021 if (!enable_route(ip
, route
))
1024 if (route
->enabled
== _enabled
)
1028 if (!(route
->flags
& DEVROUTE_METRIC
))
1029 route
->metric
= ip
->iface
->metric
;
1031 system_add_route(dev
, route
);
1033 system_del_route(dev
, route
);
1034 route
->enabled
= _enabled
;
1037 struct device_prefix
*c
;
1038 struct device_prefix_assignment
*a
;
1039 list_for_each_entry(c
, &prefixes
, head
)
1040 list_for_each_entry(a
, &c
->assignments
, head
)
1041 if (!strcmp(a
->name
, ip
->iface
->name
))
1042 interface_set_prefix_address(a
, c
, ip
->iface
, enabled
);
1044 set_ipv6_lo_policy(enabled
, dev
->ifindex
);
1048 interface_ip_update_start(struct interface_ip_settings
*ip
)
1050 if (ip
!= &ip
->iface
->config_ip
) {
1051 vlist_simple_update(&ip
->dns_servers
);
1052 vlist_simple_update(&ip
->dns_search
);
1054 vlist_update(&ip
->route
);
1055 vlist_update(&ip
->addr
);
1056 vlist_update(&ip
->prefix
);
1060 interface_ip_update_complete(struct interface_ip_settings
*ip
)
1062 vlist_simple_flush(&ip
->dns_servers
);
1063 vlist_simple_flush(&ip
->dns_search
);
1064 vlist_flush(&ip
->route
);
1065 vlist_flush(&ip
->addr
);
1066 vlist_flush(&ip
->prefix
);
1067 interface_write_resolv_conf();
1071 interface_ip_flush(struct interface_ip_settings
*ip
)
1073 if (ip
== &ip
->iface
->proto_ip
)
1074 vlist_flush_all(&ip
->iface
->host_routes
);
1075 vlist_simple_flush_all(&ip
->dns_servers
);
1076 vlist_simple_flush_all(&ip
->dns_search
);
1077 vlist_flush_all(&ip
->route
);
1078 vlist_flush_all(&ip
->addr
);
1079 vlist_flush_all(&ip
->prefix
);
1083 __interface_ip_init(struct interface_ip_settings
*ip
, struct interface
*iface
)
1087 vlist_simple_init(&ip
->dns_search
, struct dns_search_domain
, node
);
1088 vlist_simple_init(&ip
->dns_servers
, struct dns_server
, node
);
1089 vlist_init(&ip
->route
, route_cmp
, interface_update_proto_route
);
1090 vlist_init(&ip
->addr
, addr_cmp
, interface_update_proto_addr
);
1091 vlist_init(&ip
->prefix
, prefix_cmp
, interface_update_prefix
);
1095 interface_ip_init(struct interface
*iface
)
1097 __interface_ip_init(&iface
->proto_ip
, iface
);
1098 __interface_ip_init(&iface
->config_ip
, iface
);
1099 vlist_init(&iface
->host_routes
, route_cmp
, interface_update_host_route
);
1104 interface_ip_valid_until_handler(struct uloop_timeout
*t
)
1106 time_t now
= system_get_rtime();
1107 struct interface
*iface
;
1108 vlist_for_each_element(&interfaces
, iface
, node
) {
1109 if (iface
->state
!= IFS_UP
)
1112 struct device_addr
*addr
, *addrp
;
1113 struct device_route
*route
, *routep
;
1114 struct device_prefix
*pref
, *prefp
;
1116 vlist_for_each_element_safe(&iface
->proto_ip
.addr
, addr
, node
, addrp
)
1117 if (addr
->valid_until
&& addr
->valid_until
< now
)
1118 vlist_delete(&iface
->proto_ip
.addr
, &addr
->node
);
1120 vlist_for_each_element_safe(&iface
->proto_ip
.route
, route
, node
, routep
)
1121 if (route
->valid_until
&& route
->valid_until
< now
)
1122 vlist_delete(&iface
->proto_ip
.route
, &route
->node
);
1124 vlist_for_each_element_safe(&iface
->proto_ip
.prefix
, pref
, node
, prefp
)
1125 if (pref
->valid_until
&& pref
->valid_until
< now
)
1126 vlist_delete(&iface
->proto_ip
.prefix
, &pref
->node
);
1130 uloop_timeout_set(t
, 1000);
1134 interface_ip_init_worker(void)
1136 valid_until_timeout
.cb
= interface_ip_valid_until_handler
;
1137 uloop_timeout_set(&valid_until_timeout
, 1000);