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Commit | Line | Data |
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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
04473969 | 2 | /*** |
810adae9 | 3 | Copyright © 2017 Intel Corporation. All rights reserved. |
04473969 PF |
4 | ***/ |
5 | ||
6 | #include <netinet/icmp6.h> | |
7 | #include <netinet/in.h> | |
204f99d2 | 8 | #include <arpa/inet.h> |
04473969 PF |
9 | |
10 | #include "sd-radv.h" | |
11 | ||
12 | #include "alloc-util.h" | |
e965d6ab | 13 | #include "dns-domain.h" |
ae25915d | 14 | #include "ether-addr-util.h" |
807a8ede | 15 | #include "event-util.h" |
04473969 PF |
16 | #include "fd-util.h" |
17 | #include "icmp6-util.h" | |
18 | #include "in-addr-util.h" | |
5cfa2c3d LP |
19 | #include "io-util.h" |
20 | #include "macro.h" | |
0a970718 | 21 | #include "memory-util.h" |
61a9fa8f | 22 | #include "network-common.h" |
04473969 | 23 | #include "radv-internal.h" |
5cfa2c3d | 24 | #include "random-util.h" |
04473969 PF |
25 | #include "socket-util.h" |
26 | #include "string-util.h" | |
e965d6ab | 27 | #include "strv.h" |
04473969 | 28 | |
17347053 | 29 | int sd_radv_new(sd_radv **ret) { |
204f99d2 PF |
30 | _cleanup_(sd_radv_unrefp) sd_radv *ra = NULL; |
31 | ||
32 | assert_return(ret, -EINVAL); | |
33 | ||
78f9d24f | 34 | ra = new(sd_radv, 1); |
204f99d2 PF |
35 | if (!ra) |
36 | return -ENOMEM; | |
37 | ||
78f9d24f YW |
38 | *ra = (sd_radv) { |
39 | .n_ref = 1, | |
40 | .fd = -1, | |
72db0a71 | 41 | .lifetime_usec = RADV_DEFAULT_ROUTER_LIFETIME_USEC, |
78f9d24f | 42 | }; |
204f99d2 | 43 | |
1cc6c93a | 44 | *ret = TAKE_PTR(ra); |
204f99d2 PF |
45 | |
46 | return 0; | |
47 | } | |
48 | ||
17347053 | 49 | int sd_radv_attach_event(sd_radv *ra, sd_event *event, int64_t priority) { |
204f99d2 PF |
50 | int r; |
51 | ||
52 | assert_return(ra, -EINVAL); | |
53 | assert_return(!ra->event, -EBUSY); | |
54 | ||
55 | if (event) | |
56 | ra->event = sd_event_ref(event); | |
57 | else { | |
58 | r = sd_event_default(&ra->event); | |
59 | if (r < 0) | |
60 | return 0; | |
61 | } | |
62 | ||
63 | ra->event_priority = priority; | |
64 | ||
65 | return 0; | |
66 | } | |
67 | ||
17347053 | 68 | int sd_radv_detach_event(sd_radv *ra) { |
204f99d2 PF |
69 | |
70 | assert_return(ra, -EINVAL); | |
71 | ||
72 | ra->event = sd_event_unref(ra->event); | |
73 | return 0; | |
74 | } | |
75 | ||
17347053 | 76 | sd_event *sd_radv_get_event(sd_radv *ra) { |
204f99d2 PF |
77 | assert_return(ra, NULL); |
78 | ||
79 | return ra->event; | |
80 | } | |
81 | ||
17347053 | 82 | int sd_radv_is_running(sd_radv *ra) { |
96fe813c YW |
83 | assert_return(ra, false); |
84 | ||
d6fc0d67 | 85 | return ra->state != RADV_STATE_IDLE; |
96fe813c YW |
86 | } |
87 | ||
204fb681 | 88 | static void radv_reset(sd_radv *ra) { |
c4b6dda0 | 89 | assert(ra); |
204fb681 | 90 | |
807a8ede | 91 | (void) event_source_disable(ra->timeout_event_source); |
204fb681 | 92 | |
eb2f7502 | 93 | ra->recv_event_source = sd_event_source_disable_unref(ra->recv_event_source); |
88d5a3db | 94 | |
204fb681 PF |
95 | ra->ra_sent = 0; |
96 | } | |
97 | ||
8301aa0b | 98 | static sd_radv *radv_free(sd_radv *ra) { |
e866e17b LP |
99 | if (!ra) |
100 | return NULL; | |
204f99d2 PF |
101 | |
102 | while (ra->prefixes) { | |
103 | sd_radv_prefix *p = ra->prefixes; | |
104 | ||
105 | LIST_REMOVE(prefix, ra->prefixes, p); | |
106 | sd_radv_prefix_unref(p); | |
107 | } | |
108 | ||
69d7eba1 YW |
109 | while (ra->route_prefixes) { |
110 | sd_radv_route_prefix *p = ra->route_prefixes; | |
111 | ||
112 | LIST_REMOVE(prefix, ra->route_prefixes, p); | |
113 | sd_radv_route_prefix_unref(p); | |
114 | } | |
115 | ||
e9c6da38 | 116 | free(ra->rdnss); |
f9aa5417 | 117 | free(ra->dnssl); |
e9c6da38 | 118 | |
204fb681 PF |
119 | radv_reset(ra); |
120 | ||
eb2f7502 | 121 | sd_event_source_unref(ra->timeout_event_source); |
204f99d2 | 122 | sd_radv_detach_event(ra); |
c4b6dda0 LP |
123 | |
124 | ra->fd = safe_close(ra->fd); | |
61a9fa8f | 125 | free(ra->ifname); |
c4b6dda0 | 126 | |
204f99d2 PF |
127 | return mfree(ra); |
128 | } | |
129 | ||
8301aa0b YW |
130 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv, sd_radv, radv_free); |
131 | ||
09457670 YW |
132 | static bool router_lifetime_is_valid(usec_t lifetime_usec) { |
133 | return lifetime_usec == 0 || | |
134 | (lifetime_usec >= RADV_MIN_ROUTER_LIFETIME_USEC && | |
135 | lifetime_usec <= RADV_MAX_ROUTER_LIFETIME_USEC); | |
136 | } | |
137 | ||
95e104e0 YW |
138 | static be32_t usec_to_be32_sec(usec_t usec) { |
139 | if (usec == USEC_INFINITY) | |
140 | /* UINT32_MAX is handled as infinity. */ | |
141 | return htobe32(UINT32_MAX); | |
142 | ||
143 | if (usec >= UINT32_MAX * USEC_PER_SEC) | |
144 | /* Finite but too large. Let's use the largest finite value. */ | |
145 | return htobe32(UINT32_MAX - 1); | |
146 | ||
147 | return htobe32(usec / USEC_PER_SEC); | |
148 | } | |
149 | ||
7003b114 | 150 | static int radv_send(sd_radv *ra, const struct in6_addr *dst, usec_t lifetime_usec) { |
77baf5ae PF |
151 | struct sockaddr_in6 dst_addr = { |
152 | .sin6_family = AF_INET6, | |
153 | .sin6_addr = IN6ADDR_ALL_NODES_MULTICAST_INIT, | |
154 | }; | |
155 | struct nd_router_advert adv = {}; | |
156 | struct { | |
157 | struct nd_opt_hdr opthdr; | |
158 | struct ether_addr slladdr; | |
159 | } _packed_ opt_mac = { | |
160 | .opthdr = { | |
161 | .nd_opt_type = ND_OPT_SOURCE_LINKADDR, | |
162 | .nd_opt_len = (sizeof(struct nd_opt_hdr) + | |
163 | sizeof(struct ether_addr) - 1) /8 + 1, | |
164 | }, | |
165 | }; | |
166 | struct nd_opt_mtu opt_mtu = { | |
167 | .nd_opt_mtu_type = ND_OPT_MTU, | |
168 | .nd_opt_mtu_len = 1, | |
169 | }; | |
203d4df5 | 170 | /* Reserve iov space for RA header, linkaddr, MTU, N prefixes, N routes, RDNSS |
6852c0f6 | 171 | and DNSSL */ |
203d4df5 | 172 | struct iovec iov[5 + ra->n_prefixes + ra->n_route_prefixes]; |
77baf5ae PF |
173 | struct msghdr msg = { |
174 | .msg_name = &dst_addr, | |
175 | .msg_namelen = sizeof(dst_addr), | |
176 | .msg_iov = iov, | |
177 | }; | |
d601b566 PF |
178 | usec_t time_now; |
179 | int r; | |
180 | ||
dc0ec5e2 | 181 | assert(ra); |
09457670 | 182 | assert(router_lifetime_is_valid(lifetime_usec)); |
dc0ec5e2 | 183 | |
d601b566 PF |
184 | r = sd_event_now(ra->event, clock_boottime_or_monotonic(), &time_now); |
185 | if (r < 0) | |
186 | return r; | |
77baf5ae | 187 | |
94876904 | 188 | if (dst && in6_addr_is_set(dst)) |
77baf5ae | 189 | dst_addr.sin6_addr = *dst; |
88d5a3db | 190 | |
77baf5ae PF |
191 | adv.nd_ra_type = ND_ROUTER_ADVERT; |
192 | adv.nd_ra_curhoplimit = ra->hop_limit; | |
193 | adv.nd_ra_flags_reserved = ra->flags; | |
09457670 YW |
194 | assert_cc(RADV_MAX_ROUTER_LIFETIME_USEC <= UINT16_MAX * USEC_PER_SEC); |
195 | adv.nd_ra_router_lifetime = htobe16(DIV_ROUND_UP(lifetime_usec, USEC_PER_SEC)); | |
5cfa2c3d | 196 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&adv, sizeof(adv)); |
77baf5ae PF |
197 | |
198 | /* MAC address is optional, either because the link does not use L2 | |
199 | addresses or load sharing is desired. See RFC 4861, Section 4.2 */ | |
ae25915d | 200 | if (!ether_addr_is_null(&ra->mac_addr)) { |
77baf5ae | 201 | opt_mac.slladdr = ra->mac_addr; |
5cfa2c3d | 202 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mac, sizeof(opt_mac)); |
77baf5ae PF |
203 | } |
204 | ||
41521417 | 205 | if (ra->mtu > 0) { |
77baf5ae | 206 | opt_mtu.nd_opt_mtu_mtu = htobe32(ra->mtu); |
5cfa2c3d | 207 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mtu, sizeof(opt_mtu)); |
77baf5ae PF |
208 | } |
209 | ||
210 | LIST_FOREACH(prefix, p, ra->prefixes) { | |
95e104e0 | 211 | usec_t lifetime_valid_usec, lifetime_preferred_usec; |
d601b566 | 212 | |
95e104e0 YW |
213 | lifetime_valid_usec = MIN(usec_sub_unsigned(p->valid_until, time_now), |
214 | p->lifetime_valid_usec); | |
215 | ||
216 | lifetime_preferred_usec = MIN3(usec_sub_unsigned(p->preferred_until, time_now), | |
217 | p->lifetime_preferred_usec, | |
218 | lifetime_valid_usec); | |
219 | ||
220 | p->opt.lifetime_valid = usec_to_be32_sec(lifetime_valid_usec); | |
221 | p->opt.lifetime_preferred = usec_to_be32_sec(lifetime_preferred_usec); | |
d601b566 | 222 | |
5cfa2c3d | 223 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&p->opt, sizeof(p->opt)); |
77baf5ae PF |
224 | } |
225 | ||
95e104e0 YW |
226 | LIST_FOREACH(prefix, rt, ra->route_prefixes) { |
227 | rt->opt.lifetime = usec_to_be32_sec(MIN(usec_sub_unsigned(rt->valid_until, time_now), | |
228 | rt->lifetime_usec)); | |
229 | ||
203d4df5 | 230 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&rt->opt, sizeof(rt->opt)); |
95e104e0 | 231 | } |
203d4df5 | 232 | |
5cfa2c3d LP |
233 | if (ra->rdnss) |
234 | iov[msg.msg_iovlen++] = IOVEC_MAKE(ra->rdnss, ra->rdnss->length * 8); | |
e9c6da38 | 235 | |
5cfa2c3d LP |
236 | if (ra->dnssl) |
237 | iov[msg.msg_iovlen++] = IOVEC_MAKE(ra->dnssl, ra->dnssl->length * 8); | |
e965d6ab | 238 | |
77baf5ae PF |
239 | if (sendmsg(ra->fd, &msg, 0) < 0) |
240 | return -errno; | |
204fb681 | 241 | |
77baf5ae | 242 | return 0; |
204fb681 PF |
243 | } |
244 | ||
88d5a3db PF |
245 | static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
246 | sd_radv *ra = userdata; | |
247 | _cleanup_free_ char *addr = NULL; | |
248 | struct in6_addr src; | |
249 | triple_timestamp timestamp; | |
250 | int r; | |
251 | ssize_t buflen; | |
252 | _cleanup_free_ char *buf = NULL; | |
253 | ||
254 | assert(s); | |
255 | assert(ra); | |
256 | assert(ra->event); | |
257 | ||
258 | buflen = next_datagram_size_fd(fd); | |
ab8a8a4e YW |
259 | if (buflen < 0) { |
260 | if (ERRNO_IS_TRANSIENT(buflen) || ERRNO_IS_DISCONNECT(buflen)) | |
261 | return 0; | |
262 | ||
263 | log_radv_errno(ra, buflen, "Failed to determine datagram size to read, ignoring: %m"); | |
264 | return 0; | |
265 | } | |
88d5a3db PF |
266 | |
267 | buf = new0(char, buflen); | |
268 | if (!buf) | |
e55a6eae | 269 | return -ENOMEM; |
88d5a3db PF |
270 | |
271 | r = icmp6_receive(fd, buf, buflen, &src, ×tamp); | |
272 | if (r < 0) { | |
ab8a8a4e YW |
273 | if (ERRNO_IS_TRANSIENT(r) || ERRNO_IS_DISCONNECT(r)) |
274 | return 0; | |
275 | ||
88d5a3db PF |
276 | switch (r) { |
277 | case -EADDRNOTAVAIL: | |
c633628d | 278 | (void) in_addr_to_string(AF_INET6, (const union in_addr_union*) &src, &addr); |
35388783 | 279 | log_radv(ra, "Received RS from non-link-local address %s. Ignoring", addr); |
88d5a3db PF |
280 | break; |
281 | ||
282 | case -EMULTIHOP: | |
35388783 | 283 | log_radv(ra, "Received RS with invalid hop limit. Ignoring."); |
88d5a3db PF |
284 | break; |
285 | ||
286 | case -EPFNOSUPPORT: | |
35388783 | 287 | log_radv(ra, "Received invalid source address from ICMPv6 socket. Ignoring."); |
88d5a3db PF |
288 | break; |
289 | ||
290 | default: | |
ab8a8a4e | 291 | log_radv_errno(ra, r, "Unexpected error receiving from ICMPv6 socket, ignoring: %m"); |
88d5a3db PF |
292 | break; |
293 | } | |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
cfffddea | 298 | if ((size_t) buflen < sizeof(struct nd_router_solicit)) { |
35388783 | 299 | log_radv(ra, "Too short packet received, ignoring"); |
cfffddea LP |
300 | return 0; |
301 | } | |
302 | ||
c633628d | 303 | (void) in_addr_to_string(AF_INET6, (const union in_addr_union*) &src, &addr); |
88d5a3db | 304 | |
7003b114 | 305 | r = radv_send(ra, &src, ra->lifetime_usec); |
88d5a3db | 306 | if (r < 0) |
35388783 | 307 | log_radv_errno(ra, r, "Unable to send solicited Router Advertisement to %s, ignoring: %m", strnull(addr)); |
88d5a3db | 308 | else |
35388783 | 309 | log_radv(ra, "Sent solicited Router Advertisement to %s", strnull(addr)); |
88d5a3db PF |
310 | |
311 | return 0; | |
312 | } | |
313 | ||
204fb681 | 314 | static int radv_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
7003b114 | 315 | usec_t min_timeout, max_timeout, time_now, timeout; |
204fb681 | 316 | sd_radv *ra = userdata; |
7003b114 | 317 | int r; |
204fb681 PF |
318 | |
319 | assert(s); | |
320 | assert(ra); | |
321 | assert(ra->event); | |
80477557 | 322 | assert(router_lifetime_is_valid(ra->lifetime_usec)); |
204fb681 | 323 | |
204fb681 PF |
324 | r = sd_event_now(ra->event, clock_boottime_or_monotonic(), &time_now); |
325 | if (r < 0) | |
326 | goto fail; | |
327 | ||
7003b114 | 328 | r = radv_send(ra, NULL, ra->lifetime_usec); |
204fb681 | 329 | if (r < 0) |
35388783 | 330 | log_radv_errno(ra, r, "Unable to send Router Advertisement: %m"); |
204fb681 PF |
331 | |
332 | /* RFC 4861, Section 6.2.4, sending initial Router Advertisements */ | |
80477557 | 333 | if (ra->ra_sent < RADV_MAX_INITIAL_RTR_ADVERTISEMENTS) |
d6fc0d67 | 334 | max_timeout = RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC; |
80477557 | 335 | else |
03ec10fd | 336 | max_timeout = RADV_DEFAULT_MAX_TIMEOUT_USEC; |
204fb681 | 337 | |
ef90b6a4 | 338 | /* RFC 4861, Section 6.2.1, lifetime must be at least MaxRtrAdvInterval, |
80477557 YW |
339 | * so lower the interval here */ |
340 | if (ra->lifetime_usec > 0) | |
341 | max_timeout = MIN(max_timeout, ra->lifetime_usec); | |
342 | ||
343 | if (max_timeout >= 9 * USEC_PER_SEC) | |
ef90b6a4 | 344 | min_timeout = max_timeout / 3; |
80477557 YW |
345 | else |
346 | min_timeout = max_timeout * 3 / 4; | |
ef90b6a4 | 347 | |
80477557 YW |
348 | /* RFC 4861, Section 6.2.1. |
349 | * MaxRtrAdvInterval MUST be no less than 4 seconds and no greater than 1800 seconds. | |
350 | * MinRtrAdvInterval MUST be no less than 3 seconds and no greater than .75 * MaxRtrAdvInterval. */ | |
351 | assert(max_timeout >= RADV_MIN_MAX_TIMEOUT_USEC); | |
352 | assert(max_timeout <= RADV_MAX_MAX_TIMEOUT_USEC); | |
353 | assert(min_timeout >= RADV_MIN_MIN_TIMEOUT_USEC); | |
354 | assert(min_timeout <= max_timeout * 3 / 4); | |
ef90b6a4 | 355 | |
80477557 | 356 | timeout = min_timeout + random_u64_range(max_timeout - min_timeout); |
5291f26d | 357 | log_radv(ra, "Next Router Advertisement in %s", FORMAT_TIMESPAN(timeout, USEC_PER_SEC)); |
204fb681 | 358 | |
807a8ede YW |
359 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
360 | clock_boottime_or_monotonic(), | |
80477557 | 361 | usec_add(time_now, timeout), MSEC_PER_SEC, |
807a8ede YW |
362 | radv_timeout, ra, |
363 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
364 | if (r < 0) |
365 | goto fail; | |
366 | ||
367 | ra->ra_sent++; | |
368 | ||
807a8ede YW |
369 | return 0; |
370 | ||
204fb681 | 371 | fail: |
290696e5 | 372 | sd_radv_stop(ra); |
204fb681 PF |
373 | |
374 | return 0; | |
375 | } | |
376 | ||
17347053 | 377 | int sd_radv_stop(sd_radv *ra) { |
204fb681 PF |
378 | int r; |
379 | ||
c8bae363 YW |
380 | if (!ra) |
381 | return 0; | |
204f99d2 | 382 | |
d6fc0d67 | 383 | if (ra->state == RADV_STATE_IDLE) |
6f8a8b84 SS |
384 | return 0; |
385 | ||
35388783 | 386 | log_radv(ra, "Stopping IPv6 Router Advertisement daemon"); |
204f99d2 | 387 | |
290696e5 YW |
388 | /* RFC 4861, Section 6.2.5, send at least one Router Advertisement |
389 | with zero lifetime */ | |
390 | r = radv_send(ra, NULL, 0); | |
391 | if (r < 0) | |
35388783 | 392 | log_radv_errno(ra, r, "Unable to send last Router Advertisement with router lifetime set to zero: %m"); |
204fb681 PF |
393 | |
394 | radv_reset(ra); | |
77baf5ae | 395 | ra->fd = safe_close(ra->fd); |
d6fc0d67 | 396 | ra->state = RADV_STATE_IDLE; |
204f99d2 PF |
397 | |
398 | return 0; | |
399 | } | |
400 | ||
17347053 | 401 | int sd_radv_start(sd_radv *ra) { |
f474884c | 402 | int r; |
204fb681 | 403 | |
204f99d2 PF |
404 | assert_return(ra, -EINVAL); |
405 | assert_return(ra->event, -EINVAL); | |
406 | assert_return(ra->ifindex > 0, -EINVAL); | |
407 | ||
d6fc0d67 | 408 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
409 | return 0; |
410 | ||
807a8ede YW |
411 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
412 | clock_boottime_or_monotonic(), | |
413 | 0, 0, | |
414 | radv_timeout, ra, | |
415 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
416 | if (r < 0) |
417 | goto fail; | |
418 | ||
77baf5ae PF |
419 | r = icmp6_bind_router_advertisement(ra->ifindex); |
420 | if (r < 0) | |
421 | goto fail; | |
422 | ||
423 | ra->fd = r; | |
88d5a3db PF |
424 | |
425 | r = sd_event_add_io(ra->event, &ra->recv_event_source, ra->fd, EPOLLIN, radv_recv, ra); | |
426 | if (r < 0) | |
427 | goto fail; | |
428 | ||
429 | r = sd_event_source_set_priority(ra->recv_event_source, ra->event_priority); | |
430 | if (r < 0) | |
431 | goto fail; | |
432 | ||
433 | (void) sd_event_source_set_description(ra->recv_event_source, "radv-receive-message"); | |
77baf5ae | 434 | |
d6fc0d67 | 435 | ra->state = RADV_STATE_ADVERTISING; |
204f99d2 | 436 | |
35388783 | 437 | log_radv(ra, "Started IPv6 Router Advertisement daemon"); |
204f99d2 PF |
438 | |
439 | return 0; | |
204fb681 PF |
440 | |
441 | fail: | |
442 | radv_reset(ra); | |
443 | ||
444 | return r; | |
204f99d2 PF |
445 | } |
446 | ||
17347053 | 447 | int sd_radv_set_ifindex(sd_radv *ra, int ifindex) { |
204f99d2 | 448 | assert_return(ra, -EINVAL); |
7fa69c0a | 449 | assert_return(ifindex > 0, -EINVAL); |
204f99d2 | 450 | |
d6fc0d67 | 451 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
452 | return -EBUSY; |
453 | ||
454 | ra->ifindex = ifindex; | |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
61a9fa8f YW |
459 | int sd_radv_set_ifname(sd_radv *ra, const char *ifname) { |
460 | assert_return(ra, -EINVAL); | |
461 | assert_return(ifname, -EINVAL); | |
462 | ||
463 | if (!ifname_valid_full(ifname, IFNAME_VALID_ALTERNATIVE)) | |
464 | return -EINVAL; | |
465 | ||
466 | return free_and_strdup(&ra->ifname, ifname); | |
467 | } | |
468 | ||
5977b71f YW |
469 | int sd_radv_get_ifname(sd_radv *ra, const char **ret) { |
470 | int r; | |
471 | ||
472 | assert_return(ra, -EINVAL); | |
61a9fa8f | 473 | |
5977b71f YW |
474 | r = get_ifname(ra->ifindex, &ra->ifname); |
475 | if (r < 0) | |
476 | return r; | |
477 | ||
478 | if (ret) | |
479 | *ret = ra->ifname; | |
480 | ||
481 | return 0; | |
61a9fa8f YW |
482 | } |
483 | ||
17347053 | 484 | int sd_radv_set_mac(sd_radv *ra, const struct ether_addr *mac_addr) { |
204f99d2 PF |
485 | assert_return(ra, -EINVAL); |
486 | ||
d6fc0d67 | 487 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
488 | return -EBUSY; |
489 | ||
490 | if (mac_addr) | |
491 | ra->mac_addr = *mac_addr; | |
492 | else | |
493 | zero(ra->mac_addr); | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
17347053 | 498 | int sd_radv_set_mtu(sd_radv *ra, uint32_t mtu) { |
204f99d2 PF |
499 | assert_return(ra, -EINVAL); |
500 | assert_return(mtu >= 1280, -EINVAL); | |
501 | ||
204f99d2 PF |
502 | ra->mtu = mtu; |
503 | ||
504 | return 0; | |
505 | } | |
506 | ||
17347053 | 507 | int sd_radv_set_hop_limit(sd_radv *ra, uint8_t hop_limit) { |
204f99d2 PF |
508 | assert_return(ra, -EINVAL); |
509 | ||
d6fc0d67 | 510 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
511 | return -EBUSY; |
512 | ||
513 | ra->hop_limit = hop_limit; | |
514 | ||
515 | return 0; | |
516 | } | |
517 | ||
17347053 | 518 | int sd_radv_set_router_lifetime(sd_radv *ra, uint64_t lifetime_usec) { |
204f99d2 PF |
519 | assert_return(ra, -EINVAL); |
520 | ||
d6fc0d67 | 521 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
522 | return -EBUSY; |
523 | ||
09457670 YW |
524 | if (!router_lifetime_is_valid(lifetime_usec)) |
525 | return -EINVAL; | |
526 | ||
ac138551 YW |
527 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
528 | * to (00) by the sender..." */ | |
7003b114 | 529 | if (lifetime_usec == 0 && |
204f99d2 | 530 | (ra->flags & (0x3 << 3)) != (SD_NDISC_PREFERENCE_MEDIUM << 3)) |
09457670 | 531 | return -EINVAL; |
204f99d2 | 532 | |
7003b114 | 533 | ra->lifetime_usec = lifetime_usec; |
204f99d2 PF |
534 | |
535 | return 0; | |
536 | } | |
537 | ||
17347053 | 538 | int sd_radv_set_managed_information(sd_radv *ra, int managed) { |
204f99d2 PF |
539 | assert_return(ra, -EINVAL); |
540 | ||
d6fc0d67 | 541 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
542 | return -EBUSY; |
543 | ||
544 | SET_FLAG(ra->flags, ND_RA_FLAG_MANAGED, managed); | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
17347053 | 549 | int sd_radv_set_other_information(sd_radv *ra, int other) { |
204f99d2 PF |
550 | assert_return(ra, -EINVAL); |
551 | ||
d6fc0d67 | 552 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
553 | return -EBUSY; |
554 | ||
555 | SET_FLAG(ra->flags, ND_RA_FLAG_OTHER, other); | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
17347053 | 560 | int sd_radv_set_preference(sd_radv *ra, unsigned preference) { |
204f99d2 PF |
561 | assert_return(ra, -EINVAL); |
562 | assert_return(IN_SET(preference, | |
563 | SD_NDISC_PREFERENCE_LOW, | |
564 | SD_NDISC_PREFERENCE_MEDIUM, | |
565 | SD_NDISC_PREFERENCE_HIGH), -EINVAL); | |
566 | ||
dd1b1870 YW |
567 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
568 | * to (00) by the sender..." */ | |
7003b114 | 569 | if (ra->lifetime_usec == 0 && preference != SD_NDISC_PREFERENCE_MEDIUM) |
dd1b1870 YW |
570 | return -EINVAL; |
571 | ||
204f99d2 PF |
572 | ra->flags = (ra->flags & ~(0x3 << 3)) | (preference << 3); |
573 | ||
dd1b1870 | 574 | return 0; |
204f99d2 PF |
575 | } |
576 | ||
17347053 | 577 | int sd_radv_add_prefix(sd_radv *ra, sd_radv_prefix *p) { |
95e104e0 | 578 | _cleanup_free_ char *addr_p = NULL; |
03677889 | 579 | sd_radv_prefix *found = NULL; |
d601b566 | 580 | int r; |
204f99d2 PF |
581 | |
582 | assert_return(ra, -EINVAL); | |
acbb5500 | 583 | assert_return(p, -EINVAL); |
204f99d2 | 584 | |
59ea6e57 | 585 | /* Refuse prefixes that don't have a prefix set */ |
94876904 | 586 | if (in6_addr_is_null(&p->opt.in6_addr)) |
59ea6e57 LP |
587 | return -ENOEXEC; |
588 | ||
68cbac5b | 589 | (void) in6_addr_prefix_to_string(&p->opt.in6_addr, p->opt.prefixlen, &addr_p); |
5380707a | 590 | |
204f99d2 | 591 | LIST_FOREACH(prefix, cur, ra->prefixes) { |
204f99d2 PF |
592 | |
593 | r = in_addr_prefix_intersect(AF_INET6, | |
c633628d | 594 | (const union in_addr_union*) &cur->opt.in6_addr, |
204f99d2 | 595 | cur->opt.prefixlen, |
c633628d | 596 | (const union in_addr_union*) &p->opt.in6_addr, |
204f99d2 | 597 | p->opt.prefixlen); |
5380707a YW |
598 | if (r < 0) |
599 | return r; | |
600 | if (r == 0) | |
601 | continue; | |
204f99d2 | 602 | |
95e104e0 | 603 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 604 | found = cur; |
b9f27a05 | 605 | break; |
95e104e0 | 606 | } |
d601b566 | 607 | |
5380707a | 608 | _cleanup_free_ char *addr_cur = NULL; |
68cbac5b | 609 | (void) in6_addr_prefix_to_string(&cur->opt.in6_addr, cur->opt.prefixlen, &addr_cur); |
35388783 | 610 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 YW |
611 | "IPv6 prefix %s conflicts with %s, ignoring.", |
612 | strna(addr_p), strna(addr_cur)); | |
204f99d2 PF |
613 | } |
614 | ||
56aa5143 | 615 | if (found) { |
b9f27a05 YW |
616 | /* p and cur may be equivalent. First increment the reference counter. */ |
617 | sd_radv_prefix_ref(p); | |
618 | ||
619 | /* Then, remove the old entry. */ | |
56aa5143 YW |
620 | LIST_REMOVE(prefix, ra->prefixes, found); |
621 | sd_radv_prefix_unref(found); | |
b9f27a05 YW |
622 | |
623 | /* Finally, add the new entry. */ | |
624 | LIST_APPEND(prefix, ra->prefixes, p); | |
625 | ||
626 | log_radv(ra, "Updated/replaced IPv6 prefix %s (preferred: %s, valid: %s)", | |
627 | strna(addr_p), | |
628 | FORMAT_TIMESPAN(p->lifetime_preferred_usec, USEC_PER_SEC), | |
629 | FORMAT_TIMESPAN(p->lifetime_valid_usec, USEC_PER_SEC)); | |
630 | } else { | |
631 | /* The prefix is new. Let's simply add it. */ | |
632 | ||
633 | sd_radv_prefix_ref(p); | |
634 | LIST_APPEND(prefix, ra->prefixes, p); | |
635 | ra->n_prefixes++; | |
204f99d2 | 636 | |
b9f27a05 YW |
637 | log_radv(ra, "Added prefix %s", strna(addr_p)); |
638 | } | |
059d7b6e YW |
639 | |
640 | if (ra->state == RADV_STATE_IDLE) | |
641 | return 0; | |
642 | ||
059d7b6e | 643 | if (ra->ra_sent == 0) |
d601b566 | 644 | return 0; |
d601b566 | 645 | |
97efde65 | 646 | /* If RAs have already been sent, send an RA immediately to announce the newly-added prefix */ |
059d7b6e YW |
647 | r = radv_send(ra, NULL, ra->lifetime_usec); |
648 | if (r < 0) | |
b9f27a05 YW |
649 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added prefix %s: %m", |
650 | strna(addr_p)); | |
059d7b6e | 651 | else |
b9f27a05 | 652 | log_radv(ra, "Sent Router Advertisement for added/updated prefix %s.", strna(addr_p)); |
97efde65 | 653 | |
204f99d2 PF |
654 | return 0; |
655 | } | |
656 | ||
95931532 YW |
657 | void sd_radv_remove_prefix( |
658 | sd_radv *ra, | |
659 | const struct in6_addr *prefix, | |
660 | unsigned char prefixlen) { | |
34c169c4 | 661 | |
95931532 YW |
662 | if (!ra) |
663 | return; | |
34c169c4 | 664 | |
95931532 YW |
665 | if (!prefix) |
666 | return; | |
667 | ||
668 | LIST_FOREACH(prefix, cur, ra->prefixes) { | |
34c169c4 PF |
669 | if (prefixlen != cur->opt.prefixlen) |
670 | continue; | |
671 | ||
94876904 | 672 | if (!in6_addr_equal(prefix, &cur->opt.in6_addr)) |
34c169c4 PF |
673 | continue; |
674 | ||
675 | LIST_REMOVE(prefix, ra->prefixes, cur); | |
676 | ra->n_prefixes--; | |
62bbbedf | 677 | sd_radv_prefix_unref(cur); |
95931532 | 678 | return; |
34c169c4 | 679 | } |
34c169c4 PF |
680 | } |
681 | ||
17347053 | 682 | int sd_radv_add_route_prefix(sd_radv *ra, sd_radv_route_prefix *p) { |
68cbac5b | 683 | _cleanup_free_ char *addr_p = NULL; |
03677889 | 684 | sd_radv_route_prefix *found = NULL; |
203d4df5 SS |
685 | int r; |
686 | ||
687 | assert_return(ra, -EINVAL); | |
acbb5500 | 688 | assert_return(p, -EINVAL); |
203d4df5 | 689 | |
68cbac5b | 690 | (void) in6_addr_prefix_to_string(&p->opt.in6_addr, p->opt.prefixlen, &addr_p); |
203d4df5 SS |
691 | |
692 | LIST_FOREACH(prefix, cur, ra->route_prefixes) { | |
203d4df5 SS |
693 | |
694 | r = in_addr_prefix_intersect(AF_INET6, | |
c633628d | 695 | (const union in_addr_union*) &cur->opt.in6_addr, |
203d4df5 | 696 | cur->opt.prefixlen, |
c633628d | 697 | (const union in_addr_union*) &p->opt.in6_addr, |
203d4df5 SS |
698 | p->opt.prefixlen); |
699 | if (r < 0) | |
700 | return r; | |
701 | if (r == 0) | |
702 | continue; | |
703 | ||
95e104e0 | 704 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 705 | found = cur; |
b9f27a05 | 706 | break; |
95e104e0 | 707 | } |
203d4df5 | 708 | |
68cbac5b YW |
709 | _cleanup_free_ char *addr_cur = NULL; |
710 | (void) in6_addr_prefix_to_string(&cur->opt.in6_addr, cur->opt.prefixlen, &addr_cur); | |
35388783 | 711 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 YW |
712 | "IPv6 route prefix %s conflicts with %s, ignoring.", |
713 | strna(addr_p), strna(addr_cur)); | |
203d4df5 SS |
714 | } |
715 | ||
56aa5143 | 716 | if (found) { |
b9f27a05 YW |
717 | /* p and cur may be equivalent. First increment the reference counter. */ |
718 | sd_radv_route_prefix_ref(p); | |
719 | ||
720 | /* Then, remove the old entry. */ | |
56aa5143 YW |
721 | LIST_REMOVE(prefix, ra->route_prefixes, found); |
722 | sd_radv_route_prefix_unref(found); | |
b9f27a05 YW |
723 | |
724 | /* Finally, add the new entry. */ | |
725 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
726 | ||
727 | log_radv(ra, "Updated/replaced IPv6 route prefix %s (lifetime: %s)", | |
728 | strna(addr_p), | |
729 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
730 | } else { | |
731 | /* The route prefix is new. Let's simply add it. */ | |
732 | ||
733 | sd_radv_route_prefix_ref(p); | |
734 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
735 | ra->n_route_prefixes++; | |
736 | ||
737 | log_radv(ra, "Added route prefix %s", strna(addr_p)); | |
738 | } | |
059d7b6e YW |
739 | |
740 | if (ra->state == RADV_STATE_IDLE) | |
741 | return 0; | |
742 | ||
059d7b6e | 743 | if (ra->ra_sent == 0) |
203d4df5 | 744 | return 0; |
203d4df5 | 745 | |
97efde65 | 746 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ |
059d7b6e YW |
747 | r = radv_send(ra, NULL, ra->lifetime_usec); |
748 | if (r < 0) | |
b9f27a05 YW |
749 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added route prefix %s: %m", |
750 | strna(addr_p)); | |
059d7b6e | 751 | else |
b9f27a05 | 752 | log_radv(ra, "Sent Router Advertisement for added route prefix %s.", strna(addr_p)); |
97efde65 | 753 | |
203d4df5 SS |
754 | return 0; |
755 | } | |
756 | ||
faaf3d66 YW |
757 | int sd_radv_set_rdnss( |
758 | sd_radv *ra, | |
759 | uint32_t lifetime, | |
760 | const struct in6_addr *dns, | |
761 | size_t n_dns) { | |
762 | ||
e9c6da38 PF |
763 | _cleanup_free_ struct sd_radv_opt_dns *opt_rdnss = NULL; |
764 | size_t len; | |
765 | ||
766 | assert_return(ra, -EINVAL); | |
767 | assert_return(n_dns < 128, -EINVAL); | |
768 | ||
769 | if (!dns || n_dns == 0) { | |
770 | ra->rdnss = mfree(ra->rdnss); | |
771 | ra->n_rdnss = 0; | |
772 | ||
773 | return 0; | |
774 | } | |
775 | ||
776 | len = sizeof(struct sd_radv_opt_dns) + sizeof(struct in6_addr) * n_dns; | |
777 | ||
778 | opt_rdnss = malloc0(len); | |
779 | if (!opt_rdnss) | |
780 | return -ENOMEM; | |
781 | ||
d6fc0d67 | 782 | opt_rdnss->type = RADV_OPT_RDNSS; |
e9c6da38 PF |
783 | opt_rdnss->length = len / 8; |
784 | opt_rdnss->lifetime = htobe32(lifetime); | |
785 | ||
786 | memcpy(opt_rdnss + 1, dns, n_dns * sizeof(struct in6_addr)); | |
787 | ||
1cc6c93a | 788 | free_and_replace(ra->rdnss, opt_rdnss); |
e9c6da38 PF |
789 | |
790 | ra->n_rdnss = n_dns; | |
791 | ||
792 | return 0; | |
793 | } | |
794 | ||
faaf3d66 YW |
795 | int sd_radv_set_dnssl( |
796 | sd_radv *ra, | |
797 | uint32_t lifetime, | |
798 | char **search_list) { | |
799 | ||
e965d6ab PF |
800 | _cleanup_free_ struct sd_radv_opt_dns *opt_dnssl = NULL; |
801 | size_t len = 0; | |
e965d6ab PF |
802 | uint8_t *p; |
803 | ||
804 | assert_return(ra, -EINVAL); | |
805 | ||
97d7974b | 806 | if (strv_isempty(search_list)) { |
e965d6ab | 807 | ra->dnssl = mfree(ra->dnssl); |
e965d6ab PF |
808 | return 0; |
809 | } | |
810 | ||
811 | STRV_FOREACH(s, search_list) | |
812 | len += strlen(*s) + 2; | |
813 | ||
814 | len = (sizeof(struct sd_radv_opt_dns) + len + 7) & ~0x7; | |
815 | ||
816 | opt_dnssl = malloc0(len); | |
817 | if (!opt_dnssl) | |
818 | return -ENOMEM; | |
819 | ||
d6fc0d67 | 820 | opt_dnssl->type = RADV_OPT_DNSSL; |
e965d6ab PF |
821 | opt_dnssl->length = len / 8; |
822 | opt_dnssl->lifetime = htobe32(lifetime); | |
823 | ||
824 | p = (uint8_t *)(opt_dnssl + 1); | |
825 | len -= sizeof(struct sd_radv_opt_dns); | |
826 | ||
827 | STRV_FOREACH(s, search_list) { | |
828 | int r; | |
829 | ||
830 | r = dns_name_to_wire_format(*s, p, len, false); | |
831 | if (r < 0) | |
832 | return r; | |
833 | ||
834 | if (len < (size_t)r) | |
835 | return -ENOBUFS; | |
836 | ||
837 | p += r; | |
838 | len -= r; | |
839 | } | |
840 | ||
1cc6c93a | 841 | free_and_replace(ra->dnssl, opt_dnssl); |
e965d6ab PF |
842 | |
843 | return 0; | |
844 | } | |
845 | ||
17347053 | 846 | int sd_radv_prefix_new(sd_radv_prefix **ret) { |
d2c8eed2 | 847 | sd_radv_prefix *p; |
04473969 PF |
848 | |
849 | assert_return(ret, -EINVAL); | |
850 | ||
d2c8eed2 | 851 | p = new(sd_radv_prefix, 1); |
04473969 PF |
852 | if (!p) |
853 | return -ENOMEM; | |
854 | ||
d2c8eed2 LP |
855 | *p = (sd_radv_prefix) { |
856 | .n_ref = 1, | |
04473969 | 857 | |
d2c8eed2 LP |
858 | .opt.type = ND_OPT_PREFIX_INFORMATION, |
859 | .opt.length = (sizeof(p->opt) - 1)/8 + 1, | |
860 | .opt.prefixlen = 64, | |
04473969 | 861 | |
d2c8eed2 LP |
862 | /* RFC 4861, Section 6.2.1 */ |
863 | .opt.flags = ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO, | |
204f99d2 | 864 | |
d951507d YW |
865 | .lifetime_valid_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
866 | .lifetime_preferred_usec = RADV_DEFAULT_PREFERRED_LIFETIME_USEC, | |
95e104e0 YW |
867 | .valid_until = USEC_INFINITY, |
868 | .preferred_until = USEC_INFINITY, | |
d2c8eed2 | 869 | }; |
04473969 | 870 | |
d2c8eed2 | 871 | *ret = p; |
04473969 PF |
872 | return 0; |
873 | } | |
874 | ||
8301aa0b | 875 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_prefix, sd_radv_prefix, mfree); |
04473969 | 876 | |
faaf3d66 YW |
877 | int sd_radv_prefix_set_prefix( |
878 | sd_radv_prefix *p, | |
879 | const struct in6_addr *in6_addr, | |
880 | unsigned char prefixlen) { | |
881 | ||
04473969 PF |
882 | assert_return(p, -EINVAL); |
883 | assert_return(in6_addr, -EINVAL); | |
884 | ||
885 | if (prefixlen < 3 || prefixlen > 128) | |
886 | return -EINVAL; | |
887 | ||
888 | if (prefixlen > 64) | |
889 | /* unusual but allowed, log it */ | |
35388783 | 890 | log_radv(NULL, "Unusual prefix length %d greater than 64", prefixlen); |
04473969 PF |
891 | |
892 | p->opt.in6_addr = *in6_addr; | |
893 | p->opt.prefixlen = prefixlen; | |
894 | ||
895 | return 0; | |
896 | } | |
897 | ||
faaf3d66 YW |
898 | int sd_radv_prefix_get_prefix( |
899 | sd_radv_prefix *p, | |
900 | struct in6_addr *ret_in6_addr, | |
901 | unsigned char *ret_prefixlen) { | |
902 | ||
34332af2 SS |
903 | assert_return(p, -EINVAL); |
904 | assert_return(ret_in6_addr, -EINVAL); | |
905 | assert_return(ret_prefixlen, -EINVAL); | |
906 | ||
907 | *ret_in6_addr = p->opt.in6_addr; | |
908 | *ret_prefixlen = p->opt.prefixlen; | |
909 | ||
910 | return 0; | |
911 | } | |
912 | ||
17347053 | 913 | int sd_radv_prefix_set_onlink(sd_radv_prefix *p, int onlink) { |
04473969 PF |
914 | assert_return(p, -EINVAL); |
915 | ||
916 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, onlink); | |
917 | ||
918 | return 0; | |
919 | } | |
920 | ||
faaf3d66 | 921 | int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix *p, int address_autoconfiguration) { |
04473969 PF |
922 | assert_return(p, -EINVAL); |
923 | ||
924 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, address_autoconfiguration); | |
925 | ||
926 | return 0; | |
927 | } | |
928 | ||
17347053 | 929 | int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
930 | assert_return(p, -EINVAL); |
931 | ||
95e104e0 YW |
932 | p->lifetime_valid_usec = lifetime_usec; |
933 | p->valid_until = valid_until; | |
04473969 PF |
934 | |
935 | return 0; | |
936 | } | |
937 | ||
17347053 | 938 | int sd_radv_prefix_set_preferred_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
939 | assert_return(p, -EINVAL); |
940 | ||
95e104e0 YW |
941 | p->lifetime_preferred_usec = lifetime_usec; |
942 | p->preferred_until = valid_until; | |
04473969 PF |
943 | |
944 | return 0; | |
945 | } | |
203d4df5 | 946 | |
17347053 | 947 | int sd_radv_route_prefix_new(sd_radv_route_prefix **ret) { |
203d4df5 SS |
948 | sd_radv_route_prefix *p; |
949 | ||
950 | assert_return(ret, -EINVAL); | |
951 | ||
952 | p = new(sd_radv_route_prefix, 1); | |
953 | if (!p) | |
954 | return -ENOMEM; | |
955 | ||
956 | *p = (sd_radv_route_prefix) { | |
957 | .n_ref = 1, | |
958 | ||
d6fc0d67 | 959 | .opt.type = RADV_OPT_ROUTE_INFORMATION, |
203d4df5 SS |
960 | .opt.length = DIV_ROUND_UP(sizeof(p->opt), 8), |
961 | .opt.prefixlen = 64, | |
962 | ||
d951507d | 963 | .lifetime_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
95e104e0 | 964 | .valid_until = USEC_INFINITY, |
203d4df5 SS |
965 | }; |
966 | ||
967 | *ret = p; | |
968 | return 0; | |
969 | } | |
970 | ||
971 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_route_prefix, sd_radv_route_prefix, mfree); | |
972 | ||
faaf3d66 YW |
973 | int sd_radv_route_prefix_set_prefix( |
974 | sd_radv_route_prefix *p, | |
975 | const struct in6_addr *in6_addr, | |
976 | unsigned char prefixlen) { | |
977 | ||
203d4df5 SS |
978 | assert_return(p, -EINVAL); |
979 | assert_return(in6_addr, -EINVAL); | |
980 | ||
981 | if (prefixlen > 128) | |
982 | return -EINVAL; | |
983 | ||
984 | if (prefixlen > 64) | |
985 | /* unusual but allowed, log it */ | |
35388783 | 986 | log_radv(NULL, "Unusual prefix length %u greater than 64", prefixlen); |
203d4df5 SS |
987 | |
988 | p->opt.in6_addr = *in6_addr; | |
989 | p->opt.prefixlen = prefixlen; | |
990 | ||
991 | return 0; | |
992 | } | |
993 | ||
17347053 | 994 | int sd_radv_route_prefix_set_lifetime(sd_radv_route_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
203d4df5 SS |
995 | assert_return(p, -EINVAL); |
996 | ||
95e104e0 YW |
997 | p->lifetime_usec = lifetime_usec; |
998 | p->valid_until = valid_until; | |
203d4df5 SS |
999 | |
1000 | return 0; | |
1001 | } |