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