1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
3 Copyright © 2017 Intel Corporation. All rights reserved.
6 #include <netinet/icmp6.h>
7 #include <netinet/in.h>
12 #include "alloc-util.h"
13 #include "dns-domain.h"
14 #include "ether-addr-util.h"
15 #include "event-util.h"
17 #include "icmp6-util.h"
18 #include "in-addr-util.h"
21 #include "memory-util.h"
22 #include "network-common.h"
23 #include "radv-internal.h"
24 #include "random-util.h"
25 #include "socket-util.h"
26 #include "string-util.h"
29 _public_
int sd_radv_new(sd_radv
**ret
) {
30 _cleanup_(sd_radv_unrefp
) sd_radv
*ra
= NULL
;
32 assert_return(ret
, -EINVAL
);
48 _public_
int sd_radv_attach_event(sd_radv
*ra
, sd_event
*event
, int64_t priority
) {
51 assert_return(ra
, -EINVAL
);
52 assert_return(!ra
->event
, -EBUSY
);
55 ra
->event
= sd_event_ref(event
);
57 r
= sd_event_default(&ra
->event
);
62 ra
->event_priority
= priority
;
67 _public_
int sd_radv_detach_event(sd_radv
*ra
) {
69 assert_return(ra
, -EINVAL
);
71 ra
->event
= sd_event_unref(ra
->event
);
75 _public_ sd_event
*sd_radv_get_event(sd_radv
*ra
) {
76 assert_return(ra
, NULL
);
81 _public_
int sd_radv_is_running(sd_radv
*ra
) {
82 assert_return(ra
, false);
84 return ra
->state
!= SD_RADV_STATE_IDLE
;
87 static void radv_reset(sd_radv
*ra
) {
90 (void) event_source_disable(ra
->timeout_event_source
);
92 ra
->recv_event_source
= sd_event_source_disable_unref(ra
->recv_event_source
);
97 static sd_radv
*radv_free(sd_radv
*ra
) {
101 while (ra
->prefixes
) {
102 sd_radv_prefix
*p
= ra
->prefixes
;
104 LIST_REMOVE(prefix
, ra
->prefixes
, p
);
105 sd_radv_prefix_unref(p
);
108 while (ra
->route_prefixes
) {
109 sd_radv_route_prefix
*p
= ra
->route_prefixes
;
111 LIST_REMOVE(prefix
, ra
->route_prefixes
, p
);
112 sd_radv_route_prefix_unref(p
);
120 sd_event_source_unref(ra
->timeout_event_source
);
121 sd_radv_detach_event(ra
);
123 ra
->fd
= safe_close(ra
->fd
);
129 DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv
, sd_radv
, radv_free
);
131 static int radv_send(sd_radv
*ra
, const struct in6_addr
*dst
, uint32_t router_lifetime
) {
132 sd_radv_route_prefix
*rt
;
134 struct sockaddr_in6 dst_addr
= {
135 .sin6_family
= AF_INET6
,
136 .sin6_addr
= IN6ADDR_ALL_NODES_MULTICAST_INIT
,
138 struct nd_router_advert adv
= {};
140 struct nd_opt_hdr opthdr
;
141 struct ether_addr slladdr
;
142 } _packed_ opt_mac
= {
144 .nd_opt_type
= ND_OPT_SOURCE_LINKADDR
,
145 .nd_opt_len
= (sizeof(struct nd_opt_hdr
) +
146 sizeof(struct ether_addr
) - 1) /8 + 1,
149 struct nd_opt_mtu opt_mtu
= {
150 .nd_opt_mtu_type
= ND_OPT_MTU
,
153 /* Reserve iov space for RA header, linkaddr, MTU, N prefixes, N routes, RDNSS
155 struct iovec iov
[5 + ra
->n_prefixes
+ ra
->n_route_prefixes
];
156 struct msghdr msg
= {
157 .msg_name
= &dst_addr
,
158 .msg_namelen
= sizeof(dst_addr
),
166 r
= sd_event_now(ra
->event
, clock_boottime_or_monotonic(), &time_now
);
170 if (dst
&& in6_addr_is_set(dst
))
171 dst_addr
.sin6_addr
= *dst
;
173 adv
.nd_ra_type
= ND_ROUTER_ADVERT
;
174 adv
.nd_ra_curhoplimit
= ra
->hop_limit
;
175 adv
.nd_ra_flags_reserved
= ra
->flags
;
176 adv
.nd_ra_router_lifetime
= htobe16(router_lifetime
);
177 iov
[msg
.msg_iovlen
++] = IOVEC_MAKE(&adv
, sizeof(adv
));
179 /* MAC address is optional, either because the link does not use L2
180 addresses or load sharing is desired. See RFC 4861, Section 4.2 */
181 if (!ether_addr_is_null(&ra
->mac_addr
)) {
182 opt_mac
.slladdr
= ra
->mac_addr
;
183 iov
[msg
.msg_iovlen
++] = IOVEC_MAKE(&opt_mac
, sizeof(opt_mac
));
187 opt_mtu
.nd_opt_mtu_mtu
= htobe32(ra
->mtu
);
188 iov
[msg
.msg_iovlen
++] = IOVEC_MAKE(&opt_mtu
, sizeof(opt_mtu
));
191 LIST_FOREACH(prefix
, p
, ra
->prefixes
) {
192 if (p
->valid_until
) {
194 if (time_now
> p
->valid_until
)
195 p
->opt
.valid_lifetime
= 0;
197 p
->opt
.valid_lifetime
= htobe32((p
->valid_until
- time_now
) / USEC_PER_SEC
);
199 if (time_now
> p
->preferred_until
)
200 p
->opt
.preferred_lifetime
= 0;
202 p
->opt
.preferred_lifetime
= htobe32((p
->preferred_until
- time_now
) / USEC_PER_SEC
);
204 iov
[msg
.msg_iovlen
++] = IOVEC_MAKE(&p
->opt
, sizeof(p
->opt
));
207 LIST_FOREACH(prefix
, rt
, ra
->route_prefixes
)
208 iov
[msg
.msg_iovlen
++] = IOVEC_MAKE(&rt
->opt
, sizeof(rt
->opt
));
211 iov
[msg
.msg_iovlen
++] = IOVEC_MAKE(ra
->rdnss
, ra
->rdnss
->length
* 8);
214 iov
[msg
.msg_iovlen
++] = IOVEC_MAKE(ra
->dnssl
, ra
->dnssl
->length
* 8);
216 if (sendmsg(ra
->fd
, &msg
, 0) < 0)
222 static int radv_recv(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
223 sd_radv
*ra
= userdata
;
224 _cleanup_free_
char *addr
= NULL
;
226 triple_timestamp timestamp
;
229 _cleanup_free_
char *buf
= NULL
;
235 buflen
= next_datagram_size_fd(fd
);
239 buf
= new0(char, buflen
);
243 r
= icmp6_receive(fd
, buf
, buflen
, &src
, ×tamp
);
247 (void) in_addr_to_string(AF_INET6
, (const union in_addr_union
*) &src
, &addr
);
248 log_radv(ra
, "Received RS from non-link-local address %s. Ignoring", addr
);
252 log_radv(ra
, "Received RS with invalid hop limit. Ignoring.");
256 log_radv(ra
, "Received invalid source address from ICMPv6 socket. Ignoring.");
259 case -EAGAIN
: /* ignore spurious wakeups */
263 log_radv_errno(ra
, r
, "Unexpected error receiving from ICMPv6 socket, Ignoring: %m");
270 if ((size_t) buflen
< sizeof(struct nd_router_solicit
)) {
271 log_radv(ra
, "Too short packet received, ignoring");
275 (void) in_addr_to_string(AF_INET6
, (const union in_addr_union
*) &src
, &addr
);
277 r
= radv_send(ra
, &src
, ra
->lifetime
);
279 log_radv_errno(ra
, r
, "Unable to send solicited Router Advertisement to %s, ignoring: %m", strnull(addr
));
281 log_radv(ra
, "Sent solicited Router Advertisement to %s", strnull(addr
));
286 static usec_t
radv_compute_timeout(usec_t min
, usec_t max
) {
287 assert_return(min
<= max
, SD_RADV_DEFAULT_MIN_TIMEOUT_USEC
);
289 /* RFC 4861: min must be no less than 3s, max must be no less than 4s */
290 min
= MAX(min
, 3*USEC_PER_SEC
);
291 max
= MAX(max
, 4*USEC_PER_SEC
);
293 return min
+ (random_u32() % (max
- min
));
296 static int radv_timeout(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
298 sd_radv
*ra
= userdata
;
299 usec_t min_timeout
= SD_RADV_DEFAULT_MIN_TIMEOUT_USEC
;
300 usec_t max_timeout
= SD_RADV_DEFAULT_MAX_TIMEOUT_USEC
;
301 usec_t time_now
, timeout
;
307 r
= sd_event_now(ra
->event
, clock_boottime_or_monotonic(), &time_now
);
311 r
= radv_send(ra
, NULL
, ra
->lifetime
);
313 log_radv_errno(ra
, r
, "Unable to send Router Advertisement: %m");
315 /* RFC 4861, Section 6.2.4, sending initial Router Advertisements */
316 if (ra
->ra_sent
< SD_RADV_MAX_INITIAL_RTR_ADVERTISEMENTS
) {
317 max_timeout
= SD_RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC
;
318 min_timeout
= SD_RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC
/ 3;
321 /* RFC 4861, Section 6.2.1, lifetime must be at least MaxRtrAdvInterval,
322 so lower the interval here */
323 if (ra
->lifetime
> 0 && (ra
->lifetime
* USEC_PER_SEC
) < max_timeout
) {
324 max_timeout
= ra
->lifetime
* USEC_PER_SEC
;
325 min_timeout
= max_timeout
/ 3;
328 timeout
= radv_compute_timeout(min_timeout
, max_timeout
);
329 log_radv(ra
, "Next Router Advertisement in %s", FORMAT_TIMESPAN(timeout
, USEC_PER_SEC
));
331 r
= event_reset_time(ra
->event
, &ra
->timeout_event_source
,
332 clock_boottime_or_monotonic(),
333 time_now
+ timeout
, MSEC_PER_SEC
,
335 ra
->event_priority
, "radv-timeout", true);
349 _public_
int sd_radv_stop(sd_radv
*ra
) {
355 if (ra
->state
== SD_RADV_STATE_IDLE
)
358 log_radv(ra
, "Stopping IPv6 Router Advertisement daemon");
360 /* RFC 4861, Section 6.2.5, send at least one Router Advertisement
361 with zero lifetime */
362 r
= radv_send(ra
, NULL
, 0);
364 log_radv_errno(ra
, r
, "Unable to send last Router Advertisement with router lifetime set to zero: %m");
367 ra
->fd
= safe_close(ra
->fd
);
368 ra
->state
= SD_RADV_STATE_IDLE
;
373 _public_
int sd_radv_start(sd_radv
*ra
) {
376 assert_return(ra
, -EINVAL
);
377 assert_return(ra
->event
, -EINVAL
);
378 assert_return(ra
->ifindex
> 0, -EINVAL
);
380 if (ra
->state
!= SD_RADV_STATE_IDLE
)
383 r
= event_reset_time(ra
->event
, &ra
->timeout_event_source
,
384 clock_boottime_or_monotonic(),
387 ra
->event_priority
, "radv-timeout", true);
391 r
= icmp6_bind_router_advertisement(ra
->ifindex
);
397 r
= sd_event_add_io(ra
->event
, &ra
->recv_event_source
, ra
->fd
, EPOLLIN
, radv_recv
, ra
);
401 r
= sd_event_source_set_priority(ra
->recv_event_source
, ra
->event_priority
);
405 (void) sd_event_source_set_description(ra
->recv_event_source
, "radv-receive-message");
407 ra
->state
= SD_RADV_STATE_ADVERTISING
;
409 log_radv(ra
, "Started IPv6 Router Advertisement daemon");
419 _public_
int sd_radv_set_ifindex(sd_radv
*ra
, int ifindex
) {
420 assert_return(ra
, -EINVAL
);
421 assert_return(ifindex
> 0, -EINVAL
);
423 if (ra
->state
!= SD_RADV_STATE_IDLE
)
426 ra
->ifindex
= ifindex
;
431 int sd_radv_set_ifname(sd_radv
*ra
, const char *ifname
) {
432 assert_return(ra
, -EINVAL
);
433 assert_return(ifname
, -EINVAL
);
435 if (!ifname_valid_full(ifname
, IFNAME_VALID_ALTERNATIVE
))
438 return free_and_strdup(&ra
->ifname
, ifname
);
441 int sd_radv_get_ifname(sd_radv
*ra
, const char **ret
) {
444 assert_return(ra
, -EINVAL
);
446 r
= get_ifname(ra
->ifindex
, &ra
->ifname
);
456 _public_
int sd_radv_set_mac(sd_radv
*ra
, const struct ether_addr
*mac_addr
) {
457 assert_return(ra
, -EINVAL
);
459 if (ra
->state
!= SD_RADV_STATE_IDLE
)
463 ra
->mac_addr
= *mac_addr
;
470 _public_
int sd_radv_set_mtu(sd_radv
*ra
, uint32_t mtu
) {
471 assert_return(ra
, -EINVAL
);
472 assert_return(mtu
>= 1280, -EINVAL
);
479 _public_
int sd_radv_set_hop_limit(sd_radv
*ra
, uint8_t hop_limit
) {
480 assert_return(ra
, -EINVAL
);
482 if (ra
->state
!= SD_RADV_STATE_IDLE
)
485 ra
->hop_limit
= hop_limit
;
490 _public_
int sd_radv_set_router_lifetime(sd_radv
*ra
, uint16_t router_lifetime
) {
491 assert_return(ra
, -EINVAL
);
493 if (ra
->state
!= SD_RADV_STATE_IDLE
)
496 /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set
497 * to (00) by the sender..." */
498 if (router_lifetime
== 0 &&
499 (ra
->flags
& (0x3 << 3)) != (SD_NDISC_PREFERENCE_MEDIUM
<< 3))
502 ra
->lifetime
= router_lifetime
;
507 _public_
int sd_radv_set_managed_information(sd_radv
*ra
, int managed
) {
508 assert_return(ra
, -EINVAL
);
510 if (ra
->state
!= SD_RADV_STATE_IDLE
)
513 SET_FLAG(ra
->flags
, ND_RA_FLAG_MANAGED
, managed
);
518 _public_
int sd_radv_set_other_information(sd_radv
*ra
, int other
) {
519 assert_return(ra
, -EINVAL
);
521 if (ra
->state
!= SD_RADV_STATE_IDLE
)
524 SET_FLAG(ra
->flags
, ND_RA_FLAG_OTHER
, other
);
529 _public_
int sd_radv_set_preference(sd_radv
*ra
, unsigned preference
) {
530 assert_return(ra
, -EINVAL
);
531 assert_return(IN_SET(preference
,
532 SD_NDISC_PREFERENCE_LOW
,
533 SD_NDISC_PREFERENCE_MEDIUM
,
534 SD_NDISC_PREFERENCE_HIGH
), -EINVAL
);
536 /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set
537 * to (00) by the sender..." */
538 if (ra
->lifetime
== 0 && preference
!= SD_NDISC_PREFERENCE_MEDIUM
)
541 ra
->flags
= (ra
->flags
& ~(0x3 << 3)) | (preference
<< 3);
546 _public_
int sd_radv_add_prefix(sd_radv
*ra
, sd_radv_prefix
*p
, int dynamic
) {
549 _cleanup_free_
char *addr_p
= NULL
;
550 usec_t time_now
, valid
, preferred
, valid_until
, preferred_until
;
552 assert_return(ra
, -EINVAL
);
553 assert_return(p
, -EINVAL
);
555 /* Refuse prefixes that don't have a prefix set */
556 if (in6_addr_is_null(&p
->opt
.in6_addr
))
559 (void) in6_addr_prefix_to_string(&p
->opt
.in6_addr
, p
->opt
.prefixlen
, &addr_p
);
561 LIST_FOREACH(prefix
, cur
, ra
->prefixes
) {
563 r
= in_addr_prefix_intersect(AF_INET6
,
564 (const union in_addr_union
*) &cur
->opt
.in6_addr
,
566 (const union in_addr_union
*) &p
->opt
.in6_addr
,
573 if (dynamic
&& cur
->opt
.prefixlen
== p
->opt
.prefixlen
)
576 _cleanup_free_
char *addr_cur
= NULL
;
577 (void) in6_addr_prefix_to_string(&cur
->opt
.in6_addr
, cur
->opt
.prefixlen
, &addr_cur
);
578 return log_radv_errno(ra
, SYNTHETIC_ERRNO(EEXIST
),
579 "IPv6 prefix %s already configured, ignoring %s",
580 strna(addr_cur
), strna(addr_p
));
583 p
= sd_radv_prefix_ref(p
);
585 LIST_APPEND(prefix
, ra
->prefixes
, p
);
590 log_radv(ra
, "Added prefix %s", strna(addr_p
));
596 /* If RAs have already been sent, send an RA immediately to announce the newly-added prefix */
597 if (ra
->ra_sent
> 0) {
598 r
= radv_send(ra
, NULL
, ra
->lifetime
);
600 log_radv_errno(ra
, r
, "Unable to send Router Advertisement for added prefix: %m");
602 log_radv(ra
, "Sent Router Advertisement for added prefix");
606 r
= sd_event_now(ra
->event
, clock_boottime_or_monotonic(), &time_now
);
610 valid
= be32toh(p
->opt
.valid_lifetime
) * USEC_PER_SEC
;
611 valid_until
= usec_add(valid
, time_now
);
612 if (valid_until
== USEC_INFINITY
)
615 preferred
= be32toh(p
->opt
.preferred_lifetime
) * USEC_PER_SEC
;
616 preferred_until
= usec_add(preferred
, time_now
);
617 if (preferred_until
== USEC_INFINITY
)
620 cur
->valid_until
= valid_until
;
621 cur
->preferred_until
= preferred_until
;
623 log_radv(ra
, "Updated prefix %s preferred %s valid %s",
625 FORMAT_TIMESPAN(preferred
, USEC_PER_SEC
),
626 FORMAT_TIMESPAN(valid
, USEC_PER_SEC
));
631 _public_ sd_radv_prefix
*sd_radv_remove_prefix(sd_radv
*ra
,
632 const struct in6_addr
*prefix
,
633 unsigned char prefixlen
) {
634 sd_radv_prefix
*cur
, *next
;
636 assert_return(ra
, NULL
);
637 assert_return(prefix
, NULL
);
639 LIST_FOREACH_SAFE(prefix
, cur
, next
, ra
->prefixes
) {
640 if (prefixlen
!= cur
->opt
.prefixlen
)
643 if (!in6_addr_equal(prefix
, &cur
->opt
.in6_addr
))
646 LIST_REMOVE(prefix
, ra
->prefixes
, cur
);
648 sd_radv_prefix_unref(cur
);
656 _public_
int sd_radv_add_route_prefix(sd_radv
*ra
, sd_radv_route_prefix
*p
, int dynamic
) {
657 usec_t time_now
, valid
, valid_until
;
658 _cleanup_free_
char *addr_p
= NULL
;
659 sd_radv_route_prefix
*cur
;
662 assert_return(ra
, -EINVAL
);
663 assert_return(p
, -EINVAL
);
665 (void) in6_addr_prefix_to_string(&p
->opt
.in6_addr
, p
->opt
.prefixlen
, &addr_p
);
667 LIST_FOREACH(prefix
, cur
, ra
->route_prefixes
) {
669 r
= in_addr_prefix_intersect(AF_INET6
,
670 (const union in_addr_union
*) &cur
->opt
.in6_addr
,
672 (const union in_addr_union
*) &p
->opt
.in6_addr
,
679 if (dynamic
&& cur
->opt
.prefixlen
== p
->opt
.prefixlen
)
682 _cleanup_free_
char *addr_cur
= NULL
;
683 (void) in6_addr_prefix_to_string(&cur
->opt
.in6_addr
, cur
->opt
.prefixlen
, &addr_cur
);
684 return log_radv_errno(ra
, SYNTHETIC_ERRNO(EEXIST
),
685 "IPv6 route prefix %s already configured, ignoring %s",
686 strna(addr_cur
), strna(addr_p
));
689 p
= sd_radv_route_prefix_ref(p
);
691 LIST_APPEND(prefix
, ra
->route_prefixes
, p
);
692 ra
->n_route_prefixes
++;
695 log_radv(ra
, "Added prefix %s", strna(addr_p
));
699 /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */
700 if (ra
->ra_sent
> 0) {
701 r
= radv_send(ra
, NULL
, ra
->lifetime
);
703 log_radv_errno(ra
, r
, "Unable to send Router Advertisement for added route prefix: %m");
705 log_radv(ra
, "Sent Router Advertisement for added route prefix");
709 r
= sd_event_now(ra
->event
, clock_boottime_or_monotonic(), &time_now
);
713 valid
= be32toh(p
->opt
.lifetime
) * USEC_PER_SEC
;
714 valid_until
= usec_add(valid
, time_now
);
715 if (valid_until
== USEC_INFINITY
)
718 log_radv(ra
, "Updated route prefix %s valid %s",
720 FORMAT_TIMESPAN(valid
, USEC_PER_SEC
));
725 _public_
int sd_radv_set_rdnss(sd_radv
*ra
, uint32_t lifetime
,
726 const struct in6_addr
*dns
, size_t n_dns
) {
727 _cleanup_free_
struct sd_radv_opt_dns
*opt_rdnss
= NULL
;
730 assert_return(ra
, -EINVAL
);
731 assert_return(n_dns
< 128, -EINVAL
);
733 if (!dns
|| n_dns
== 0) {
734 ra
->rdnss
= mfree(ra
->rdnss
);
740 len
= sizeof(struct sd_radv_opt_dns
) + sizeof(struct in6_addr
) * n_dns
;
742 opt_rdnss
= malloc0(len
);
746 opt_rdnss
->type
= SD_RADV_OPT_RDNSS
;
747 opt_rdnss
->length
= len
/ 8;
748 opt_rdnss
->lifetime
= htobe32(lifetime
);
750 memcpy(opt_rdnss
+ 1, dns
, n_dns
* sizeof(struct in6_addr
));
752 free_and_replace(ra
->rdnss
, opt_rdnss
);
759 _public_
int sd_radv_set_dnssl(sd_radv
*ra
, uint32_t lifetime
,
760 char **search_list
) {
761 _cleanup_free_
struct sd_radv_opt_dns
*opt_dnssl
= NULL
;
766 assert_return(ra
, -EINVAL
);
768 if (strv_isempty(search_list
)) {
769 ra
->dnssl
= mfree(ra
->dnssl
);
773 STRV_FOREACH(s
, search_list
)
774 len
+= strlen(*s
) + 2;
776 len
= (sizeof(struct sd_radv_opt_dns
) + len
+ 7) & ~0x7;
778 opt_dnssl
= malloc0(len
);
782 opt_dnssl
->type
= SD_RADV_OPT_DNSSL
;
783 opt_dnssl
->length
= len
/ 8;
784 opt_dnssl
->lifetime
= htobe32(lifetime
);
786 p
= (uint8_t *)(opt_dnssl
+ 1);
787 len
-= sizeof(struct sd_radv_opt_dns
);
789 STRV_FOREACH(s
, search_list
) {
792 r
= dns_name_to_wire_format(*s
, p
, len
, false);
803 free_and_replace(ra
->dnssl
, opt_dnssl
);
808 _public_
int sd_radv_prefix_new(sd_radv_prefix
**ret
) {
811 assert_return(ret
, -EINVAL
);
813 p
= new(sd_radv_prefix
, 1);
817 *p
= (sd_radv_prefix
) {
820 .opt
.type
= ND_OPT_PREFIX_INFORMATION
,
821 .opt
.length
= (sizeof(p
->opt
) - 1)/8 + 1,
824 /* RFC 4861, Section 6.2.1 */
825 .opt
.flags
= ND_OPT_PI_FLAG_ONLINK
|ND_OPT_PI_FLAG_AUTO
,
827 .opt
.preferred_lifetime
= htobe32(604800),
828 .opt
.valid_lifetime
= htobe32(2592000),
835 DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_prefix
, sd_radv_prefix
, mfree
);
837 _public_
int sd_radv_prefix_set_prefix(sd_radv_prefix
*p
, const struct in6_addr
*in6_addr
,
838 unsigned char prefixlen
) {
839 assert_return(p
, -EINVAL
);
840 assert_return(in6_addr
, -EINVAL
);
842 if (prefixlen
< 3 || prefixlen
> 128)
846 /* unusual but allowed, log it */
847 log_radv(NULL
, "Unusual prefix length %d greater than 64", prefixlen
);
849 p
->opt
.in6_addr
= *in6_addr
;
850 p
->opt
.prefixlen
= prefixlen
;
855 _public_
int sd_radv_prefix_get_prefix(sd_radv_prefix
*p
, struct in6_addr
*ret_in6_addr
,
856 unsigned char *ret_prefixlen
) {
857 assert_return(p
, -EINVAL
);
858 assert_return(ret_in6_addr
, -EINVAL
);
859 assert_return(ret_prefixlen
, -EINVAL
);
861 *ret_in6_addr
= p
->opt
.in6_addr
;
862 *ret_prefixlen
= p
->opt
.prefixlen
;
867 _public_
int sd_radv_prefix_set_onlink(sd_radv_prefix
*p
, int onlink
) {
868 assert_return(p
, -EINVAL
);
870 SET_FLAG(p
->opt
.flags
, ND_OPT_PI_FLAG_ONLINK
, onlink
);
875 _public_
int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix
*p
,
876 int address_autoconfiguration
) {
877 assert_return(p
, -EINVAL
);
879 SET_FLAG(p
->opt
.flags
, ND_OPT_PI_FLAG_AUTO
, address_autoconfiguration
);
884 _public_
int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix
*p
,
885 uint32_t valid_lifetime
) {
886 assert_return(p
, -EINVAL
);
888 p
->opt
.valid_lifetime
= htobe32(valid_lifetime
);
893 _public_
int sd_radv_prefix_set_preferred_lifetime(sd_radv_prefix
*p
,
894 uint32_t preferred_lifetime
) {
895 assert_return(p
, -EINVAL
);
897 p
->opt
.preferred_lifetime
= htobe32(preferred_lifetime
);
902 _public_
int sd_radv_route_prefix_new(sd_radv_route_prefix
**ret
) {
903 sd_radv_route_prefix
*p
;
905 assert_return(ret
, -EINVAL
);
907 p
= new(sd_radv_route_prefix
, 1);
911 *p
= (sd_radv_route_prefix
) {
914 .opt
.type
= SD_RADV_OPT_ROUTE_INFORMATION
,
915 .opt
.length
= DIV_ROUND_UP(sizeof(p
->opt
), 8),
918 .opt
.lifetime
= htobe32(604800),
925 DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_route_prefix
, sd_radv_route_prefix
, mfree
);
927 _public_
int sd_radv_route_prefix_set_prefix(sd_radv_route_prefix
*p
, const struct in6_addr
*in6_addr
,
928 unsigned char prefixlen
) {
929 assert_return(p
, -EINVAL
);
930 assert_return(in6_addr
, -EINVAL
);
936 /* unusual but allowed, log it */
937 log_radv(NULL
, "Unusual prefix length %u greater than 64", prefixlen
);
939 p
->opt
.in6_addr
= *in6_addr
;
940 p
->opt
.prefixlen
= prefixlen
;
945 _public_
int sd_radv_route_prefix_set_lifetime(sd_radv_route_prefix
*p
, uint32_t valid_lifetime
) {
946 assert_return(p
, -EINVAL
);
948 p
->opt
.lifetime
= htobe32(valid_lifetime
);