1 /* SPDX-License-Identifier: LGPL-2.1+ */
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 "radv-internal.h"
23 #include "random-util.h"
24 #include "socket-util.h"
25 #include "string-util.h"
28 _public_
int sd_radv_new(sd_radv
**ret
) {
29 _cleanup_(sd_radv_unrefp
) sd_radv
*ra
= NULL
;
31 assert_return(ret
, -EINVAL
);
47 _public_
int sd_radv_attach_event(sd_radv
*ra
, sd_event
*event
, int64_t priority
) {
50 assert_return(ra
, -EINVAL
);
51 assert_return(!ra
->event
, -EBUSY
);
54 ra
->event
= sd_event_ref(event
);
56 r
= sd_event_default(&ra
->event
);
61 ra
->event_priority
= priority
;
66 _public_
int sd_radv_detach_event(sd_radv
*ra
) {
68 assert_return(ra
, -EINVAL
);
70 ra
->event
= sd_event_unref(ra
->event
);
74 _public_ sd_event
*sd_radv_get_event(sd_radv
*ra
) {
75 assert_return(ra
, NULL
);
80 _public_
int sd_radv_is_running(sd_radv
*ra
) {
81 assert_return(ra
, false);
83 return ra
->state
!= SD_RADV_STATE_IDLE
;
86 static void radv_reset(sd_radv
*ra
) {
89 (void) event_source_disable(ra
->timeout_event_source
);
91 ra
->recv_event_source
=
92 sd_event_source_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
);
118 ra
->timeout_event_source
= sd_event_source_unref(ra
->timeout_event_source
);
122 sd_radv_detach_event(ra
);
124 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_IS_ADDR_UNSPECIFIED(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
, (union in_addr_union
*) &src
, &addr
);
248 log_radv("Received RS from non-link-local address %s. Ignoring", addr
);
252 log_radv("Received RS with invalid hop limit. Ignoring.");
256 log_radv("Received invalid source address from ICMPv6 socket. Ignoring.");
259 case -EAGAIN
: /* ignore spurious wakeups */
263 log_radv_errno(r
, "Unexpected error receiving from ICMPv6 socket: %m");
270 if ((size_t) buflen
< sizeof(struct nd_router_solicit
)) {
271 log_radv("Too short packet received");
275 (void) in_addr_to_string(AF_INET6
, (union in_addr_union
*) &src
, &addr
);
277 r
= radv_send(ra
, &src
, ra
->lifetime
);
279 log_radv_errno(r
, "Unable to send solicited Router Advertisement to %s: %m", strnull(addr
));
281 log_radv("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
;
302 char time_string
[FORMAT_TIMESPAN_MAX
];
308 r
= sd_event_now(ra
->event
, clock_boottime_or_monotonic(), &time_now
);
312 r
= radv_send(ra
, NULL
, ra
->lifetime
);
314 log_radv_errno(r
, "Unable to send Router Advertisement: %m");
316 /* RFC 4861, Section 6.2.4, sending initial Router Advertisements */
317 if (ra
->ra_sent
< SD_RADV_MAX_INITIAL_RTR_ADVERTISEMENTS
) {
318 max_timeout
= SD_RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC
;
319 min_timeout
= SD_RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC
/ 3;
322 /* RFC 4861, Section 6.2.1, lifetime must be at least MaxRtrAdvInterval,
323 so lower the interval here */
324 if (ra
->lifetime
> 0 && (ra
->lifetime
* USEC_PER_SEC
) < max_timeout
) {
325 max_timeout
= ra
->lifetime
* USEC_PER_SEC
;
326 min_timeout
= max_timeout
/ 3;
329 timeout
= radv_compute_timeout(min_timeout
, max_timeout
);
331 log_radv("Next Router Advertisement in %s",
332 format_timespan(time_string
, FORMAT_TIMESPAN_MAX
,
333 timeout
, USEC_PER_SEC
));
335 r
= event_reset_time(ra
->event
, &ra
->timeout_event_source
,
336 clock_boottime_or_monotonic(),
337 time_now
+ timeout
, MSEC_PER_SEC
,
339 ra
->event_priority
, "radv-timeout", true);
353 _public_
int sd_radv_stop(sd_radv
*ra
) {
356 assert_return(ra
, -EINVAL
);
358 if (ra
->state
== SD_RADV_STATE_IDLE
)
361 log_radv("Stopping IPv6 Router Advertisement daemon");
363 /* RFC 4861, Section 6.2.5, send at least one Router Advertisement
364 with zero lifetime */
365 r
= radv_send(ra
, NULL
, 0);
367 log_radv_errno(r
, "Unable to send last Router Advertisement with router lifetime set to zero: %m");
370 ra
->fd
= safe_close(ra
->fd
);
371 ra
->state
= SD_RADV_STATE_IDLE
;
376 _public_
int sd_radv_start(sd_radv
*ra
) {
379 assert_return(ra
, -EINVAL
);
380 assert_return(ra
->event
, -EINVAL
);
381 assert_return(ra
->ifindex
> 0, -EINVAL
);
383 if (ra
->state
!= SD_RADV_STATE_IDLE
)
386 r
= event_reset_time(ra
->event
, &ra
->timeout_event_source
,
387 clock_boottime_or_monotonic(),
390 ra
->event_priority
, "radv-timeout", true);
394 r
= icmp6_bind_router_advertisement(ra
->ifindex
);
400 r
= sd_event_add_io(ra
->event
, &ra
->recv_event_source
, ra
->fd
, EPOLLIN
, radv_recv
, ra
);
404 r
= sd_event_source_set_priority(ra
->recv_event_source
, ra
->event_priority
);
408 (void) sd_event_source_set_description(ra
->recv_event_source
, "radv-receive-message");
410 ra
->state
= SD_RADV_STATE_ADVERTISING
;
412 log_radv("Started IPv6 Router Advertisement daemon");
422 _public_
int sd_radv_set_ifindex(sd_radv
*ra
, int ifindex
) {
423 assert_return(ra
, -EINVAL
);
424 assert_return(ifindex
> 0, -EINVAL
);
426 if (ra
->state
!= SD_RADV_STATE_IDLE
)
429 ra
->ifindex
= ifindex
;
434 _public_
int sd_radv_set_mac(sd_radv
*ra
, const struct ether_addr
*mac_addr
) {
435 assert_return(ra
, -EINVAL
);
437 if (ra
->state
!= SD_RADV_STATE_IDLE
)
441 ra
->mac_addr
= *mac_addr
;
448 _public_
int sd_radv_set_mtu(sd_radv
*ra
, uint32_t mtu
) {
449 assert_return(ra
, -EINVAL
);
450 assert_return(mtu
>= 1280, -EINVAL
);
457 _public_
int sd_radv_set_hop_limit(sd_radv
*ra
, uint8_t hop_limit
) {
458 assert_return(ra
, -EINVAL
);
460 if (ra
->state
!= SD_RADV_STATE_IDLE
)
463 ra
->hop_limit
= hop_limit
;
468 _public_
int sd_radv_set_router_lifetime(sd_radv
*ra
, uint32_t router_lifetime
) {
469 assert_return(ra
, -EINVAL
);
471 if (ra
->state
!= SD_RADV_STATE_IDLE
)
474 /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the
475 preference value MUST be set to (00) by the sender..." */
476 if (router_lifetime
== 0 &&
477 (ra
->flags
& (0x3 << 3)) != (SD_NDISC_PREFERENCE_MEDIUM
<< 3))
480 ra
->lifetime
= router_lifetime
;
485 _public_
int sd_radv_set_managed_information(sd_radv
*ra
, int managed
) {
486 assert_return(ra
, -EINVAL
);
488 if (ra
->state
!= SD_RADV_STATE_IDLE
)
491 SET_FLAG(ra
->flags
, ND_RA_FLAG_MANAGED
, managed
);
496 _public_
int sd_radv_set_other_information(sd_radv
*ra
, int other
) {
497 assert_return(ra
, -EINVAL
);
499 if (ra
->state
!= SD_RADV_STATE_IDLE
)
502 SET_FLAG(ra
->flags
, ND_RA_FLAG_OTHER
, other
);
507 _public_
int sd_radv_set_preference(sd_radv
*ra
, unsigned preference
) {
510 assert_return(ra
, -EINVAL
);
511 assert_return(IN_SET(preference
,
512 SD_NDISC_PREFERENCE_LOW
,
513 SD_NDISC_PREFERENCE_MEDIUM
,
514 SD_NDISC_PREFERENCE_HIGH
), -EINVAL
);
516 ra
->flags
= (ra
->flags
& ~(0x3 << 3)) | (preference
<< 3);
521 _public_
int sd_radv_add_prefix(sd_radv
*ra
, sd_radv_prefix
*p
, int dynamic
) {
524 _cleanup_free_
char *addr_p
= NULL
;
525 char time_string_preferred
[FORMAT_TIMESPAN_MAX
];
526 char time_string_valid
[FORMAT_TIMESPAN_MAX
];
527 usec_t time_now
, valid
, preferred
, valid_until
, preferred_until
;
529 assert_return(ra
, -EINVAL
);
534 /* Refuse prefixes that don't have a prefix set */
535 if (IN6_IS_ADDR_UNSPECIFIED(&p
->opt
.in6_addr
))
538 LIST_FOREACH(prefix
, cur
, ra
->prefixes
) {
540 r
= in_addr_prefix_intersect(AF_INET6
,
541 (union in_addr_union
*) &cur
->opt
.in6_addr
,
543 (union in_addr_union
*) &p
->opt
.in6_addr
,
546 _cleanup_free_
char *addr_cur
= NULL
;
548 (void) in_addr_to_string(AF_INET6
,
549 (union in_addr_union
*) &p
->opt
.in6_addr
,
552 if (dynamic
&& cur
->opt
.prefixlen
== p
->opt
.prefixlen
)
555 (void) in_addr_to_string(AF_INET6
,
556 (union in_addr_union
*) &cur
->opt
.in6_addr
,
558 log_radv("IPv6 prefix %s/%u already configured, ignoring %s/%u",
559 addr_cur
, cur
->opt
.prefixlen
,
560 addr_p
, p
->opt
.prefixlen
);
566 p
= sd_radv_prefix_ref(p
);
568 LIST_APPEND(prefix
, ra
->prefixes
, p
);
572 (void) in_addr_to_string(AF_INET6
, (union in_addr_union
*) &p
->opt
.in6_addr
, &addr_p
);
575 log_radv("Added prefix %s/%d", addr_p
, p
->opt
.prefixlen
);
582 r
= sd_event_now(ra
->event
, clock_boottime_or_monotonic(), &time_now
);
586 valid
= be32toh(p
->opt
.valid_lifetime
) * USEC_PER_SEC
;
587 valid_until
= usec_add(valid
, time_now
);
588 if (valid_until
== USEC_INFINITY
)
591 preferred
= be32toh(p
->opt
.preferred_lifetime
) * USEC_PER_SEC
;
592 preferred_until
= usec_add(preferred
, time_now
);
593 if (preferred_until
== USEC_INFINITY
)
596 cur
->valid_until
= valid_until
;
597 cur
->preferred_until
= preferred_until
;
599 log_radv("Updated prefix %s/%u preferred %s valid %s",
600 addr_p
, p
->opt
.prefixlen
,
601 format_timespan(time_string_preferred
, FORMAT_TIMESPAN_MAX
,
602 preferred
, USEC_PER_SEC
),
603 format_timespan(time_string_valid
, FORMAT_TIMESPAN_MAX
,
604 valid
, USEC_PER_SEC
));
609 _public_ sd_radv_prefix
*sd_radv_remove_prefix(sd_radv
*ra
,
610 const struct in6_addr
*prefix
,
611 unsigned char prefixlen
) {
612 sd_radv_prefix
*cur
, *next
;
614 assert_return(ra
, NULL
);
615 assert_return(prefix
, NULL
);
617 LIST_FOREACH_SAFE(prefix
, cur
, next
, ra
->prefixes
) {
618 if (prefixlen
!= cur
->opt
.prefixlen
)
621 if (!in_addr_equal(AF_INET6
,
622 (union in_addr_union
*)prefix
,
623 (union in_addr_union
*)&cur
->opt
.in6_addr
))
626 LIST_REMOVE(prefix
, ra
->prefixes
, cur
);
628 sd_radv_prefix_unref(cur
);
636 _public_
int sd_radv_add_route_prefix(sd_radv
*ra
, sd_radv_route_prefix
*p
, int dynamic
) {
637 char time_string_valid
[FORMAT_TIMESPAN_MAX
];
638 usec_t time_now
, valid
, valid_until
;
639 _cleanup_free_
char *pretty
= NULL
;
640 sd_radv_route_prefix
*cur
;
643 assert_return(ra
, -EINVAL
);
648 (void) in_addr_to_string(AF_INET6
,
649 (union in_addr_union
*) &p
->opt
.in6_addr
,
652 LIST_FOREACH(prefix
, cur
, ra
->route_prefixes
) {
653 _cleanup_free_
char *addr
= NULL
;
655 r
= in_addr_prefix_intersect(AF_INET6
,
656 (union in_addr_union
*) &cur
->opt
.in6_addr
,
658 (union in_addr_union
*) &p
->opt
.in6_addr
,
665 if (dynamic
&& cur
->opt
.prefixlen
== p
->opt
.prefixlen
)
668 (void) in_addr_to_string(AF_INET6
,
669 (union in_addr_union
*) &cur
->opt
.in6_addr
,
671 log_radv("IPv6 route prefix %s/%u already configured, ignoring %s/%u",
672 strempty(addr
), cur
->opt
.prefixlen
,
673 strempty(pretty
), p
->opt
.prefixlen
);
678 p
= sd_radv_route_prefix_ref(p
);
680 LIST_APPEND(prefix
, ra
->route_prefixes
, p
);
681 ra
->n_route_prefixes
++;
685 log_radv("Added prefix %s/%u", strempty(pretty
), p
->opt
.prefixlen
);
690 r
= sd_event_now(ra
->event
, clock_boottime_or_monotonic(), &time_now
);
694 valid
= be32toh(p
->opt
.lifetime
) * USEC_PER_SEC
;
695 valid_until
= usec_add(valid
, time_now
);
696 if (valid_until
== USEC_INFINITY
)
699 log_radv("Updated route prefix %s/%u valid %s",
700 strempty(pretty
), p
->opt
.prefixlen
,
701 format_timespan(time_string_valid
, FORMAT_TIMESPAN_MAX
, valid
, USEC_PER_SEC
));
706 _public_
int sd_radv_set_rdnss(sd_radv
*ra
, uint32_t lifetime
,
707 const struct in6_addr
*dns
, size_t n_dns
) {
708 _cleanup_free_
struct sd_radv_opt_dns
*opt_rdnss
= NULL
;
711 assert_return(ra
, -EINVAL
);
712 assert_return(n_dns
< 128, -EINVAL
);
714 if (!dns
|| n_dns
== 0) {
715 ra
->rdnss
= mfree(ra
->rdnss
);
721 len
= sizeof(struct sd_radv_opt_dns
) + sizeof(struct in6_addr
) * n_dns
;
723 opt_rdnss
= malloc0(len
);
727 opt_rdnss
->type
= SD_RADV_OPT_RDNSS
;
728 opt_rdnss
->length
= len
/ 8;
729 opt_rdnss
->lifetime
= htobe32(lifetime
);
731 memcpy(opt_rdnss
+ 1, dns
, n_dns
* sizeof(struct in6_addr
));
733 free_and_replace(ra
->rdnss
, opt_rdnss
);
740 _public_
int sd_radv_set_dnssl(sd_radv
*ra
, uint32_t lifetime
,
741 char **search_list
) {
742 _cleanup_free_
struct sd_radv_opt_dns
*opt_dnssl
= NULL
;
747 assert_return(ra
, -EINVAL
);
749 if (strv_isempty(search_list
)) {
750 ra
->dnssl
= mfree(ra
->dnssl
);
754 STRV_FOREACH(s
, search_list
)
755 len
+= strlen(*s
) + 2;
757 len
= (sizeof(struct sd_radv_opt_dns
) + len
+ 7) & ~0x7;
759 opt_dnssl
= malloc0(len
);
763 opt_dnssl
->type
= SD_RADV_OPT_DNSSL
;
764 opt_dnssl
->length
= len
/ 8;
765 opt_dnssl
->lifetime
= htobe32(lifetime
);
767 p
= (uint8_t *)(opt_dnssl
+ 1);
768 len
-= sizeof(struct sd_radv_opt_dns
);
770 STRV_FOREACH(s
, search_list
) {
773 r
= dns_name_to_wire_format(*s
, p
, len
, false);
784 free_and_replace(ra
->dnssl
, opt_dnssl
);
789 _public_
int sd_radv_prefix_new(sd_radv_prefix
**ret
) {
792 assert_return(ret
, -EINVAL
);
794 p
= new(sd_radv_prefix
, 1);
798 *p
= (sd_radv_prefix
) {
801 .opt
.type
= ND_OPT_PREFIX_INFORMATION
,
802 .opt
.length
= (sizeof(p
->opt
) - 1)/8 + 1,
805 /* RFC 4861, Section 6.2.1 */
806 .opt
.flags
= ND_OPT_PI_FLAG_ONLINK
|ND_OPT_PI_FLAG_AUTO
,
808 .opt
.preferred_lifetime
= htobe32(604800),
809 .opt
.valid_lifetime
= htobe32(2592000),
816 DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_prefix
, sd_radv_prefix
, mfree
);
818 _public_
int sd_radv_prefix_set_prefix(sd_radv_prefix
*p
, const struct in6_addr
*in6_addr
,
819 unsigned char prefixlen
) {
820 assert_return(p
, -EINVAL
);
821 assert_return(in6_addr
, -EINVAL
);
823 if (prefixlen
< 3 || prefixlen
> 128)
827 /* unusual but allowed, log it */
828 log_radv("Unusual prefix length %d greater than 64", prefixlen
);
830 p
->opt
.in6_addr
= *in6_addr
;
831 p
->opt
.prefixlen
= prefixlen
;
836 _public_
int sd_radv_prefix_get_prefix(sd_radv_prefix
*p
, struct in6_addr
*ret_in6_addr
,
837 unsigned char *ret_prefixlen
) {
838 assert_return(p
, -EINVAL
);
839 assert_return(ret_in6_addr
, -EINVAL
);
840 assert_return(ret_prefixlen
, -EINVAL
);
842 *ret_in6_addr
= p
->opt
.in6_addr
;
843 *ret_prefixlen
= p
->opt
.prefixlen
;
848 _public_
int sd_radv_prefix_set_onlink(sd_radv_prefix
*p
, int onlink
) {
849 assert_return(p
, -EINVAL
);
851 SET_FLAG(p
->opt
.flags
, ND_OPT_PI_FLAG_ONLINK
, onlink
);
856 _public_
int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix
*p
,
857 int address_autoconfiguration
) {
858 assert_return(p
, -EINVAL
);
860 SET_FLAG(p
->opt
.flags
, ND_OPT_PI_FLAG_AUTO
, address_autoconfiguration
);
865 _public_
int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix
*p
,
866 uint32_t valid_lifetime
) {
867 assert_return(p
, -EINVAL
);
869 p
->opt
.valid_lifetime
= htobe32(valid_lifetime
);
874 _public_
int sd_radv_prefix_set_preferred_lifetime(sd_radv_prefix
*p
,
875 uint32_t preferred_lifetime
) {
876 assert_return(p
, -EINVAL
);
878 p
->opt
.preferred_lifetime
= htobe32(preferred_lifetime
);
883 _public_
int sd_radv_route_prefix_new(sd_radv_route_prefix
**ret
) {
884 sd_radv_route_prefix
*p
;
886 assert_return(ret
, -EINVAL
);
888 p
= new(sd_radv_route_prefix
, 1);
892 *p
= (sd_radv_route_prefix
) {
895 .opt
.type
= SD_RADV_OPT_ROUTE_INFORMATION
,
896 .opt
.length
= DIV_ROUND_UP(sizeof(p
->opt
), 8),
899 .opt
.lifetime
= htobe32(604800),
906 DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_route_prefix
, sd_radv_route_prefix
, mfree
);
908 _public_
int sd_radv_prefix_set_route_prefix(sd_radv_route_prefix
*p
, const struct in6_addr
*in6_addr
,
909 unsigned char prefixlen
) {
910 assert_return(p
, -EINVAL
);
911 assert_return(in6_addr
, -EINVAL
);
917 /* unusual but allowed, log it */
918 log_radv("Unusual prefix length %u greater than 64", prefixlen
);
920 p
->opt
.in6_addr
= *in6_addr
;
921 p
->opt
.prefixlen
= prefixlen
;
926 _public_
int sd_radv_route_prefix_set_lifetime(sd_radv_route_prefix
*p
, uint32_t valid_lifetime
) {
927 assert_return(p
, -EINVAL
);
929 p
->opt
.lifetime
= htobe32(valid_lifetime
);