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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, | |
254d1313 | 40 | .fd = -EBADF, |
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 | |
ba4e0427 | 184 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
d601b566 PF |
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 | 245 | static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
99534007 | 246 | sd_radv *ra = ASSERT_PTR(userdata); |
88d5a3db PF |
247 | struct in6_addr src; |
248 | triple_timestamp timestamp; | |
249 | int r; | |
88d5a3db PF |
250 | |
251 | assert(s); | |
88d5a3db PF |
252 | assert(ra->event); |
253 | ||
dd6d433a | 254 | ssize_t buflen = next_datagram_size_fd(fd); |
ab8a8a4e YW |
255 | if (buflen < 0) { |
256 | if (ERRNO_IS_TRANSIENT(buflen) || ERRNO_IS_DISCONNECT(buflen)) | |
257 | return 0; | |
258 | ||
259 | log_radv_errno(ra, buflen, "Failed to determine datagram size to read, ignoring: %m"); | |
260 | return 0; | |
261 | } | |
88d5a3db | 262 | |
dd6d433a | 263 | _cleanup_free_ char *buf = new0(char, buflen); |
88d5a3db | 264 | if (!buf) |
e55a6eae | 265 | return -ENOMEM; |
88d5a3db PF |
266 | |
267 | r = icmp6_receive(fd, buf, buflen, &src, ×tamp); | |
268 | if (r < 0) { | |
ab8a8a4e YW |
269 | if (ERRNO_IS_TRANSIENT(r) || ERRNO_IS_DISCONNECT(r)) |
270 | return 0; | |
271 | ||
88d5a3db PF |
272 | switch (r) { |
273 | case -EADDRNOTAVAIL: | |
84dbb3fd ZJS |
274 | log_radv(ra, "Received RS from non-link-local address %s. Ignoring", |
275 | IN6_ADDR_TO_STRING(&src)); | |
88d5a3db PF |
276 | break; |
277 | ||
278 | case -EMULTIHOP: | |
35388783 | 279 | log_radv(ra, "Received RS with invalid hop limit. Ignoring."); |
88d5a3db PF |
280 | break; |
281 | ||
282 | case -EPFNOSUPPORT: | |
35388783 | 283 | log_radv(ra, "Received invalid source address from ICMPv6 socket. Ignoring."); |
88d5a3db PF |
284 | break; |
285 | ||
286 | default: | |
ab8a8a4e | 287 | log_radv_errno(ra, r, "Unexpected error receiving from ICMPv6 socket, ignoring: %m"); |
88d5a3db PF |
288 | break; |
289 | } | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
cfffddea | 294 | if ((size_t) buflen < sizeof(struct nd_router_solicit)) { |
35388783 | 295 | log_radv(ra, "Too short packet received, ignoring"); |
cfffddea LP |
296 | return 0; |
297 | } | |
298 | ||
84dbb3fd | 299 | const char *addr = IN6_ADDR_TO_STRING(&src); |
88d5a3db | 300 | |
7003b114 | 301 | r = radv_send(ra, &src, ra->lifetime_usec); |
88d5a3db | 302 | if (r < 0) |
84dbb3fd | 303 | log_radv_errno(ra, r, "Unable to send solicited Router Advertisement to %s, ignoring: %m", addr); |
88d5a3db | 304 | else |
84dbb3fd | 305 | log_radv(ra, "Sent solicited Router Advertisement to %s", addr); |
88d5a3db PF |
306 | |
307 | return 0; | |
308 | } | |
309 | ||
204fb681 | 310 | static int radv_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
7003b114 | 311 | usec_t min_timeout, max_timeout, time_now, timeout; |
99534007 | 312 | sd_radv *ra = ASSERT_PTR(userdata); |
7003b114 | 313 | int r; |
204fb681 PF |
314 | |
315 | assert(s); | |
204fb681 | 316 | assert(ra->event); |
80477557 | 317 | assert(router_lifetime_is_valid(ra->lifetime_usec)); |
204fb681 | 318 | |
ba4e0427 | 319 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
204fb681 PF |
320 | if (r < 0) |
321 | goto fail; | |
322 | ||
7003b114 | 323 | r = radv_send(ra, NULL, ra->lifetime_usec); |
204fb681 | 324 | if (r < 0) |
abb977a6 | 325 | log_radv_errno(ra, r, "Unable to send Router Advertisement, ignoring: %m"); |
204fb681 PF |
326 | |
327 | /* RFC 4861, Section 6.2.4, sending initial Router Advertisements */ | |
80477557 | 328 | if (ra->ra_sent < RADV_MAX_INITIAL_RTR_ADVERTISEMENTS) |
d6fc0d67 | 329 | max_timeout = RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC; |
80477557 | 330 | else |
03ec10fd | 331 | max_timeout = RADV_DEFAULT_MAX_TIMEOUT_USEC; |
204fb681 | 332 | |
ef90b6a4 | 333 | /* RFC 4861, Section 6.2.1, lifetime must be at least MaxRtrAdvInterval, |
80477557 YW |
334 | * so lower the interval here */ |
335 | if (ra->lifetime_usec > 0) | |
336 | max_timeout = MIN(max_timeout, ra->lifetime_usec); | |
337 | ||
338 | if (max_timeout >= 9 * USEC_PER_SEC) | |
ef90b6a4 | 339 | min_timeout = max_timeout / 3; |
80477557 YW |
340 | else |
341 | min_timeout = max_timeout * 3 / 4; | |
ef90b6a4 | 342 | |
80477557 YW |
343 | /* RFC 4861, Section 6.2.1. |
344 | * MaxRtrAdvInterval MUST be no less than 4 seconds and no greater than 1800 seconds. | |
345 | * MinRtrAdvInterval MUST be no less than 3 seconds and no greater than .75 * MaxRtrAdvInterval. */ | |
346 | assert(max_timeout >= RADV_MIN_MAX_TIMEOUT_USEC); | |
347 | assert(max_timeout <= RADV_MAX_MAX_TIMEOUT_USEC); | |
348 | assert(min_timeout >= RADV_MIN_MIN_TIMEOUT_USEC); | |
349 | assert(min_timeout <= max_timeout * 3 / 4); | |
ef90b6a4 | 350 | |
80477557 | 351 | timeout = min_timeout + random_u64_range(max_timeout - min_timeout); |
5291f26d | 352 | log_radv(ra, "Next Router Advertisement in %s", FORMAT_TIMESPAN(timeout, USEC_PER_SEC)); |
204fb681 | 353 | |
807a8ede | 354 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 355 | CLOCK_BOOTTIME, |
80477557 | 356 | usec_add(time_now, timeout), MSEC_PER_SEC, |
807a8ede YW |
357 | radv_timeout, ra, |
358 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
359 | if (r < 0) |
360 | goto fail; | |
361 | ||
362 | ra->ra_sent++; | |
363 | ||
807a8ede YW |
364 | return 0; |
365 | ||
204fb681 | 366 | fail: |
290696e5 | 367 | sd_radv_stop(ra); |
204fb681 PF |
368 | |
369 | return 0; | |
370 | } | |
371 | ||
17347053 | 372 | int sd_radv_stop(sd_radv *ra) { |
204fb681 PF |
373 | int r; |
374 | ||
c8bae363 YW |
375 | if (!ra) |
376 | return 0; | |
204f99d2 | 377 | |
d6fc0d67 | 378 | if (ra->state == RADV_STATE_IDLE) |
6f8a8b84 SS |
379 | return 0; |
380 | ||
35388783 | 381 | log_radv(ra, "Stopping IPv6 Router Advertisement daemon"); |
204f99d2 | 382 | |
290696e5 YW |
383 | /* RFC 4861, Section 6.2.5, send at least one Router Advertisement |
384 | with zero lifetime */ | |
385 | r = radv_send(ra, NULL, 0); | |
386 | if (r < 0) | |
abb977a6 | 387 | log_radv_errno(ra, r, "Unable to send last Router Advertisement with router lifetime set to zero, ignoring: %m"); |
204fb681 PF |
388 | |
389 | radv_reset(ra); | |
77baf5ae | 390 | ra->fd = safe_close(ra->fd); |
d6fc0d67 | 391 | ra->state = RADV_STATE_IDLE; |
204f99d2 PF |
392 | |
393 | return 0; | |
394 | } | |
395 | ||
17347053 | 396 | int sd_radv_start(sd_radv *ra) { |
f474884c | 397 | int r; |
204fb681 | 398 | |
204f99d2 PF |
399 | assert_return(ra, -EINVAL); |
400 | assert_return(ra->event, -EINVAL); | |
401 | assert_return(ra->ifindex > 0, -EINVAL); | |
402 | ||
d6fc0d67 | 403 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
404 | return 0; |
405 | ||
807a8ede | 406 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 407 | CLOCK_BOOTTIME, |
807a8ede YW |
408 | 0, 0, |
409 | radv_timeout, ra, | |
410 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
411 | if (r < 0) |
412 | goto fail; | |
413 | ||
77baf5ae PF |
414 | r = icmp6_bind_router_advertisement(ra->ifindex); |
415 | if (r < 0) | |
416 | goto fail; | |
417 | ||
418 | ra->fd = r; | |
88d5a3db PF |
419 | |
420 | r = sd_event_add_io(ra->event, &ra->recv_event_source, ra->fd, EPOLLIN, radv_recv, ra); | |
421 | if (r < 0) | |
422 | goto fail; | |
423 | ||
424 | r = sd_event_source_set_priority(ra->recv_event_source, ra->event_priority); | |
425 | if (r < 0) | |
426 | goto fail; | |
427 | ||
428 | (void) sd_event_source_set_description(ra->recv_event_source, "radv-receive-message"); | |
77baf5ae | 429 | |
d6fc0d67 | 430 | ra->state = RADV_STATE_ADVERTISING; |
204f99d2 | 431 | |
35388783 | 432 | log_radv(ra, "Started IPv6 Router Advertisement daemon"); |
204f99d2 PF |
433 | |
434 | return 0; | |
204fb681 PF |
435 | |
436 | fail: | |
437 | radv_reset(ra); | |
438 | ||
439 | return r; | |
204f99d2 PF |
440 | } |
441 | ||
17347053 | 442 | int sd_radv_set_ifindex(sd_radv *ra, int ifindex) { |
204f99d2 | 443 | assert_return(ra, -EINVAL); |
7fa69c0a | 444 | assert_return(ifindex > 0, -EINVAL); |
204f99d2 | 445 | |
d6fc0d67 | 446 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
447 | return -EBUSY; |
448 | ||
449 | ra->ifindex = ifindex; | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
61a9fa8f YW |
454 | int sd_radv_set_ifname(sd_radv *ra, const char *ifname) { |
455 | assert_return(ra, -EINVAL); | |
456 | assert_return(ifname, -EINVAL); | |
457 | ||
458 | if (!ifname_valid_full(ifname, IFNAME_VALID_ALTERNATIVE)) | |
459 | return -EINVAL; | |
460 | ||
461 | return free_and_strdup(&ra->ifname, ifname); | |
462 | } | |
463 | ||
5977b71f YW |
464 | int sd_radv_get_ifname(sd_radv *ra, const char **ret) { |
465 | int r; | |
466 | ||
467 | assert_return(ra, -EINVAL); | |
61a9fa8f | 468 | |
5977b71f YW |
469 | r = get_ifname(ra->ifindex, &ra->ifname); |
470 | if (r < 0) | |
471 | return r; | |
472 | ||
473 | if (ret) | |
474 | *ret = ra->ifname; | |
475 | ||
476 | return 0; | |
61a9fa8f YW |
477 | } |
478 | ||
17347053 | 479 | int sd_radv_set_mac(sd_radv *ra, const struct ether_addr *mac_addr) { |
204f99d2 PF |
480 | assert_return(ra, -EINVAL); |
481 | ||
d6fc0d67 | 482 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
483 | return -EBUSY; |
484 | ||
485 | if (mac_addr) | |
486 | ra->mac_addr = *mac_addr; | |
487 | else | |
488 | zero(ra->mac_addr); | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
17347053 | 493 | int sd_radv_set_mtu(sd_radv *ra, uint32_t mtu) { |
204f99d2 PF |
494 | assert_return(ra, -EINVAL); |
495 | assert_return(mtu >= 1280, -EINVAL); | |
496 | ||
204f99d2 PF |
497 | ra->mtu = mtu; |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
17347053 | 502 | int sd_radv_set_hop_limit(sd_radv *ra, uint8_t hop_limit) { |
204f99d2 PF |
503 | assert_return(ra, -EINVAL); |
504 | ||
d6fc0d67 | 505 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
506 | return -EBUSY; |
507 | ||
508 | ra->hop_limit = hop_limit; | |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
17347053 | 513 | int sd_radv_set_router_lifetime(sd_radv *ra, uint64_t lifetime_usec) { |
204f99d2 PF |
514 | assert_return(ra, -EINVAL); |
515 | ||
d6fc0d67 | 516 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
517 | return -EBUSY; |
518 | ||
09457670 YW |
519 | if (!router_lifetime_is_valid(lifetime_usec)) |
520 | return -EINVAL; | |
521 | ||
ac138551 YW |
522 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
523 | * to (00) by the sender..." */ | |
7003b114 | 524 | if (lifetime_usec == 0 && |
204f99d2 | 525 | (ra->flags & (0x3 << 3)) != (SD_NDISC_PREFERENCE_MEDIUM << 3)) |
09457670 | 526 | return -EINVAL; |
204f99d2 | 527 | |
7003b114 | 528 | ra->lifetime_usec = lifetime_usec; |
204f99d2 PF |
529 | |
530 | return 0; | |
531 | } | |
532 | ||
17347053 | 533 | int sd_radv_set_managed_information(sd_radv *ra, int managed) { |
204f99d2 PF |
534 | assert_return(ra, -EINVAL); |
535 | ||
d6fc0d67 | 536 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
537 | return -EBUSY; |
538 | ||
539 | SET_FLAG(ra->flags, ND_RA_FLAG_MANAGED, managed); | |
540 | ||
541 | return 0; | |
542 | } | |
543 | ||
17347053 | 544 | int sd_radv_set_other_information(sd_radv *ra, int other) { |
204f99d2 PF |
545 | assert_return(ra, -EINVAL); |
546 | ||
d6fc0d67 | 547 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
548 | return -EBUSY; |
549 | ||
550 | SET_FLAG(ra->flags, ND_RA_FLAG_OTHER, other); | |
551 | ||
552 | return 0; | |
553 | } | |
554 | ||
17347053 | 555 | int sd_radv_set_preference(sd_radv *ra, unsigned preference) { |
204f99d2 PF |
556 | assert_return(ra, -EINVAL); |
557 | assert_return(IN_SET(preference, | |
558 | SD_NDISC_PREFERENCE_LOW, | |
559 | SD_NDISC_PREFERENCE_MEDIUM, | |
560 | SD_NDISC_PREFERENCE_HIGH), -EINVAL); | |
561 | ||
dd1b1870 YW |
562 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
563 | * to (00) by the sender..." */ | |
7003b114 | 564 | if (ra->lifetime_usec == 0 && preference != SD_NDISC_PREFERENCE_MEDIUM) |
dd1b1870 YW |
565 | return -EINVAL; |
566 | ||
204f99d2 PF |
567 | ra->flags = (ra->flags & ~(0x3 << 3)) | (preference << 3); |
568 | ||
dd1b1870 | 569 | return 0; |
204f99d2 PF |
570 | } |
571 | ||
17347053 | 572 | int sd_radv_add_prefix(sd_radv *ra, sd_radv_prefix *p) { |
03677889 | 573 | sd_radv_prefix *found = NULL; |
d601b566 | 574 | int r; |
204f99d2 PF |
575 | |
576 | assert_return(ra, -EINVAL); | |
acbb5500 | 577 | assert_return(p, -EINVAL); |
204f99d2 | 578 | |
59ea6e57 | 579 | /* Refuse prefixes that don't have a prefix set */ |
94876904 | 580 | if (in6_addr_is_null(&p->opt.in6_addr)) |
59ea6e57 LP |
581 | return -ENOEXEC; |
582 | ||
c71384a9 | 583 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
5380707a | 584 | |
204f99d2 | 585 | LIST_FOREACH(prefix, cur, ra->prefixes) { |
204f99d2 | 586 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 587 | (const union in_addr_union*) &cur->opt.in6_addr, |
204f99d2 | 588 | cur->opt.prefixlen, |
c633628d | 589 | (const union in_addr_union*) &p->opt.in6_addr, |
204f99d2 | 590 | p->opt.prefixlen); |
5380707a YW |
591 | if (r < 0) |
592 | return r; | |
593 | if (r == 0) | |
594 | continue; | |
204f99d2 | 595 | |
95e104e0 | 596 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 597 | found = cur; |
b9f27a05 | 598 | break; |
95e104e0 | 599 | } |
d601b566 | 600 | |
35388783 | 601 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 602 | "IPv6 prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
603 | addr_p, |
604 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
204f99d2 PF |
605 | } |
606 | ||
56aa5143 | 607 | if (found) { |
b9f27a05 YW |
608 | /* p and cur may be equivalent. First increment the reference counter. */ |
609 | sd_radv_prefix_ref(p); | |
610 | ||
611 | /* Then, remove the old entry. */ | |
56aa5143 YW |
612 | LIST_REMOVE(prefix, ra->prefixes, found); |
613 | sd_radv_prefix_unref(found); | |
b9f27a05 YW |
614 | |
615 | /* Finally, add the new entry. */ | |
616 | LIST_APPEND(prefix, ra->prefixes, p); | |
617 | ||
618 | log_radv(ra, "Updated/replaced IPv6 prefix %s (preferred: %s, valid: %s)", | |
c71384a9 | 619 | addr_p, |
b9f27a05 YW |
620 | FORMAT_TIMESPAN(p->lifetime_preferred_usec, USEC_PER_SEC), |
621 | FORMAT_TIMESPAN(p->lifetime_valid_usec, USEC_PER_SEC)); | |
622 | } else { | |
623 | /* The prefix is new. Let's simply add it. */ | |
624 | ||
625 | sd_radv_prefix_ref(p); | |
626 | LIST_APPEND(prefix, ra->prefixes, p); | |
627 | ra->n_prefixes++; | |
204f99d2 | 628 | |
c71384a9 | 629 | log_radv(ra, "Added prefix %s", addr_p); |
b9f27a05 | 630 | } |
059d7b6e YW |
631 | |
632 | if (ra->state == RADV_STATE_IDLE) | |
633 | return 0; | |
634 | ||
059d7b6e | 635 | if (ra->ra_sent == 0) |
d601b566 | 636 | return 0; |
d601b566 | 637 | |
97efde65 | 638 | /* If RAs have already been sent, send an RA immediately to announce the newly-added prefix */ |
059d7b6e YW |
639 | r = radv_send(ra, NULL, ra->lifetime_usec); |
640 | if (r < 0) | |
abb977a6 | 641 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added prefix %s, ignoring: %m", addr_p); |
059d7b6e | 642 | else |
c71384a9 | 643 | log_radv(ra, "Sent Router Advertisement for added/updated prefix %s.", addr_p); |
97efde65 | 644 | |
204f99d2 PF |
645 | return 0; |
646 | } | |
647 | ||
95931532 YW |
648 | void sd_radv_remove_prefix( |
649 | sd_radv *ra, | |
650 | const struct in6_addr *prefix, | |
651 | unsigned char prefixlen) { | |
34c169c4 | 652 | |
95931532 YW |
653 | if (!ra) |
654 | return; | |
34c169c4 | 655 | |
95931532 YW |
656 | if (!prefix) |
657 | return; | |
658 | ||
659 | LIST_FOREACH(prefix, cur, ra->prefixes) { | |
34c169c4 PF |
660 | if (prefixlen != cur->opt.prefixlen) |
661 | continue; | |
662 | ||
94876904 | 663 | if (!in6_addr_equal(prefix, &cur->opt.in6_addr)) |
34c169c4 PF |
664 | continue; |
665 | ||
666 | LIST_REMOVE(prefix, ra->prefixes, cur); | |
667 | ra->n_prefixes--; | |
62bbbedf | 668 | sd_radv_prefix_unref(cur); |
95931532 | 669 | return; |
34c169c4 | 670 | } |
34c169c4 PF |
671 | } |
672 | ||
17347053 | 673 | int sd_radv_add_route_prefix(sd_radv *ra, sd_radv_route_prefix *p) { |
03677889 | 674 | sd_radv_route_prefix *found = NULL; |
203d4df5 SS |
675 | int r; |
676 | ||
677 | assert_return(ra, -EINVAL); | |
acbb5500 | 678 | assert_return(p, -EINVAL); |
203d4df5 | 679 | |
c71384a9 | 680 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
203d4df5 SS |
681 | |
682 | LIST_FOREACH(prefix, cur, ra->route_prefixes) { | |
203d4df5 | 683 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 684 | (const union in_addr_union*) &cur->opt.in6_addr, |
203d4df5 | 685 | cur->opt.prefixlen, |
c633628d | 686 | (const union in_addr_union*) &p->opt.in6_addr, |
203d4df5 SS |
687 | p->opt.prefixlen); |
688 | if (r < 0) | |
689 | return r; | |
690 | if (r == 0) | |
691 | continue; | |
692 | ||
95e104e0 | 693 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 694 | found = cur; |
b9f27a05 | 695 | break; |
95e104e0 | 696 | } |
203d4df5 | 697 | |
35388783 | 698 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 699 | "IPv6 route prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
700 | addr_p, |
701 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
203d4df5 SS |
702 | } |
703 | ||
56aa5143 | 704 | if (found) { |
b9f27a05 YW |
705 | /* p and cur may be equivalent. First increment the reference counter. */ |
706 | sd_radv_route_prefix_ref(p); | |
707 | ||
708 | /* Then, remove the old entry. */ | |
56aa5143 YW |
709 | LIST_REMOVE(prefix, ra->route_prefixes, found); |
710 | sd_radv_route_prefix_unref(found); | |
b9f27a05 YW |
711 | |
712 | /* Finally, add the new entry. */ | |
713 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
714 | ||
715 | log_radv(ra, "Updated/replaced IPv6 route prefix %s (lifetime: %s)", | |
716 | strna(addr_p), | |
717 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
718 | } else { | |
719 | /* The route prefix is new. Let's simply add it. */ | |
720 | ||
721 | sd_radv_route_prefix_ref(p); | |
722 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
723 | ra->n_route_prefixes++; | |
724 | ||
725 | log_radv(ra, "Added route prefix %s", strna(addr_p)); | |
726 | } | |
059d7b6e YW |
727 | |
728 | if (ra->state == RADV_STATE_IDLE) | |
729 | return 0; | |
730 | ||
059d7b6e | 731 | if (ra->ra_sent == 0) |
203d4df5 | 732 | return 0; |
203d4df5 | 733 | |
97efde65 | 734 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ |
059d7b6e YW |
735 | r = radv_send(ra, NULL, ra->lifetime_usec); |
736 | if (r < 0) | |
abb977a6 | 737 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added route prefix %s, ignoring: %m", |
b9f27a05 | 738 | strna(addr_p)); |
059d7b6e | 739 | else |
b9f27a05 | 740 | log_radv(ra, "Sent Router Advertisement for added route prefix %s.", strna(addr_p)); |
97efde65 | 741 | |
203d4df5 SS |
742 | return 0; |
743 | } | |
744 | ||
faaf3d66 YW |
745 | int sd_radv_set_rdnss( |
746 | sd_radv *ra, | |
747 | uint32_t lifetime, | |
748 | const struct in6_addr *dns, | |
749 | size_t n_dns) { | |
750 | ||
e9c6da38 PF |
751 | _cleanup_free_ struct sd_radv_opt_dns *opt_rdnss = NULL; |
752 | size_t len; | |
753 | ||
754 | assert_return(ra, -EINVAL); | |
755 | assert_return(n_dns < 128, -EINVAL); | |
756 | ||
757 | if (!dns || n_dns == 0) { | |
758 | ra->rdnss = mfree(ra->rdnss); | |
759 | ra->n_rdnss = 0; | |
760 | ||
761 | return 0; | |
762 | } | |
763 | ||
764 | len = sizeof(struct sd_radv_opt_dns) + sizeof(struct in6_addr) * n_dns; | |
765 | ||
766 | opt_rdnss = malloc0(len); | |
767 | if (!opt_rdnss) | |
768 | return -ENOMEM; | |
769 | ||
d6fc0d67 | 770 | opt_rdnss->type = RADV_OPT_RDNSS; |
e9c6da38 PF |
771 | opt_rdnss->length = len / 8; |
772 | opt_rdnss->lifetime = htobe32(lifetime); | |
773 | ||
774 | memcpy(opt_rdnss + 1, dns, n_dns * sizeof(struct in6_addr)); | |
775 | ||
1cc6c93a | 776 | free_and_replace(ra->rdnss, opt_rdnss); |
e9c6da38 PF |
777 | |
778 | ra->n_rdnss = n_dns; | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
faaf3d66 YW |
783 | int sd_radv_set_dnssl( |
784 | sd_radv *ra, | |
785 | uint32_t lifetime, | |
786 | char **search_list) { | |
787 | ||
e965d6ab PF |
788 | _cleanup_free_ struct sd_radv_opt_dns *opt_dnssl = NULL; |
789 | size_t len = 0; | |
e965d6ab PF |
790 | uint8_t *p; |
791 | ||
792 | assert_return(ra, -EINVAL); | |
793 | ||
97d7974b | 794 | if (strv_isempty(search_list)) { |
e965d6ab | 795 | ra->dnssl = mfree(ra->dnssl); |
e965d6ab PF |
796 | return 0; |
797 | } | |
798 | ||
799 | STRV_FOREACH(s, search_list) | |
800 | len += strlen(*s) + 2; | |
801 | ||
802 | len = (sizeof(struct sd_radv_opt_dns) + len + 7) & ~0x7; | |
803 | ||
804 | opt_dnssl = malloc0(len); | |
805 | if (!opt_dnssl) | |
806 | return -ENOMEM; | |
807 | ||
d6fc0d67 | 808 | opt_dnssl->type = RADV_OPT_DNSSL; |
e965d6ab PF |
809 | opt_dnssl->length = len / 8; |
810 | opt_dnssl->lifetime = htobe32(lifetime); | |
811 | ||
812 | p = (uint8_t *)(opt_dnssl + 1); | |
813 | len -= sizeof(struct sd_radv_opt_dns); | |
814 | ||
815 | STRV_FOREACH(s, search_list) { | |
816 | int r; | |
817 | ||
818 | r = dns_name_to_wire_format(*s, p, len, false); | |
819 | if (r < 0) | |
820 | return r; | |
821 | ||
822 | if (len < (size_t)r) | |
823 | return -ENOBUFS; | |
824 | ||
825 | p += r; | |
826 | len -= r; | |
827 | } | |
828 | ||
1cc6c93a | 829 | free_and_replace(ra->dnssl, opt_dnssl); |
e965d6ab PF |
830 | |
831 | return 0; | |
832 | } | |
833 | ||
17347053 | 834 | int sd_radv_prefix_new(sd_radv_prefix **ret) { |
d2c8eed2 | 835 | sd_radv_prefix *p; |
04473969 PF |
836 | |
837 | assert_return(ret, -EINVAL); | |
838 | ||
d2c8eed2 | 839 | p = new(sd_radv_prefix, 1); |
04473969 PF |
840 | if (!p) |
841 | return -ENOMEM; | |
842 | ||
d2c8eed2 LP |
843 | *p = (sd_radv_prefix) { |
844 | .n_ref = 1, | |
04473969 | 845 | |
d2c8eed2 LP |
846 | .opt.type = ND_OPT_PREFIX_INFORMATION, |
847 | .opt.length = (sizeof(p->opt) - 1)/8 + 1, | |
848 | .opt.prefixlen = 64, | |
04473969 | 849 | |
d2c8eed2 LP |
850 | /* RFC 4861, Section 6.2.1 */ |
851 | .opt.flags = ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO, | |
204f99d2 | 852 | |
d951507d YW |
853 | .lifetime_valid_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
854 | .lifetime_preferred_usec = RADV_DEFAULT_PREFERRED_LIFETIME_USEC, | |
95e104e0 YW |
855 | .valid_until = USEC_INFINITY, |
856 | .preferred_until = USEC_INFINITY, | |
d2c8eed2 | 857 | }; |
04473969 | 858 | |
d2c8eed2 | 859 | *ret = p; |
04473969 PF |
860 | return 0; |
861 | } | |
862 | ||
8301aa0b | 863 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_prefix, sd_radv_prefix, mfree); |
04473969 | 864 | |
faaf3d66 YW |
865 | int sd_radv_prefix_set_prefix( |
866 | sd_radv_prefix *p, | |
867 | const struct in6_addr *in6_addr, | |
868 | unsigned char prefixlen) { | |
869 | ||
04473969 PF |
870 | assert_return(p, -EINVAL); |
871 | assert_return(in6_addr, -EINVAL); | |
872 | ||
873 | if (prefixlen < 3 || prefixlen > 128) | |
874 | return -EINVAL; | |
875 | ||
876 | if (prefixlen > 64) | |
877 | /* unusual but allowed, log it */ | |
35388783 | 878 | log_radv(NULL, "Unusual prefix length %d greater than 64", prefixlen); |
04473969 PF |
879 | |
880 | p->opt.in6_addr = *in6_addr; | |
881 | p->opt.prefixlen = prefixlen; | |
882 | ||
883 | return 0; | |
884 | } | |
885 | ||
faaf3d66 YW |
886 | int sd_radv_prefix_get_prefix( |
887 | sd_radv_prefix *p, | |
888 | struct in6_addr *ret_in6_addr, | |
889 | unsigned char *ret_prefixlen) { | |
890 | ||
34332af2 SS |
891 | assert_return(p, -EINVAL); |
892 | assert_return(ret_in6_addr, -EINVAL); | |
893 | assert_return(ret_prefixlen, -EINVAL); | |
894 | ||
895 | *ret_in6_addr = p->opt.in6_addr; | |
896 | *ret_prefixlen = p->opt.prefixlen; | |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
17347053 | 901 | int sd_radv_prefix_set_onlink(sd_radv_prefix *p, int onlink) { |
04473969 PF |
902 | assert_return(p, -EINVAL); |
903 | ||
904 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, onlink); | |
905 | ||
906 | return 0; | |
907 | } | |
908 | ||
faaf3d66 | 909 | int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix *p, int address_autoconfiguration) { |
04473969 PF |
910 | assert_return(p, -EINVAL); |
911 | ||
912 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, address_autoconfiguration); | |
913 | ||
914 | return 0; | |
915 | } | |
916 | ||
17347053 | 917 | int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
918 | assert_return(p, -EINVAL); |
919 | ||
95e104e0 YW |
920 | p->lifetime_valid_usec = lifetime_usec; |
921 | p->valid_until = valid_until; | |
04473969 PF |
922 | |
923 | return 0; | |
924 | } | |
925 | ||
17347053 | 926 | int sd_radv_prefix_set_preferred_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
927 | assert_return(p, -EINVAL); |
928 | ||
95e104e0 YW |
929 | p->lifetime_preferred_usec = lifetime_usec; |
930 | p->preferred_until = valid_until; | |
04473969 PF |
931 | |
932 | return 0; | |
933 | } | |
203d4df5 | 934 | |
17347053 | 935 | int sd_radv_route_prefix_new(sd_radv_route_prefix **ret) { |
203d4df5 SS |
936 | sd_radv_route_prefix *p; |
937 | ||
938 | assert_return(ret, -EINVAL); | |
939 | ||
940 | p = new(sd_radv_route_prefix, 1); | |
941 | if (!p) | |
942 | return -ENOMEM; | |
943 | ||
944 | *p = (sd_radv_route_prefix) { | |
945 | .n_ref = 1, | |
946 | ||
d6fc0d67 | 947 | .opt.type = RADV_OPT_ROUTE_INFORMATION, |
203d4df5 SS |
948 | .opt.length = DIV_ROUND_UP(sizeof(p->opt), 8), |
949 | .opt.prefixlen = 64, | |
950 | ||
d951507d | 951 | .lifetime_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
95e104e0 | 952 | .valid_until = USEC_INFINITY, |
203d4df5 SS |
953 | }; |
954 | ||
955 | *ret = p; | |
956 | return 0; | |
957 | } | |
958 | ||
959 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_route_prefix, sd_radv_route_prefix, mfree); | |
960 | ||
faaf3d66 YW |
961 | int sd_radv_route_prefix_set_prefix( |
962 | sd_radv_route_prefix *p, | |
963 | const struct in6_addr *in6_addr, | |
964 | unsigned char prefixlen) { | |
965 | ||
203d4df5 SS |
966 | assert_return(p, -EINVAL); |
967 | assert_return(in6_addr, -EINVAL); | |
968 | ||
969 | if (prefixlen > 128) | |
970 | return -EINVAL; | |
971 | ||
972 | if (prefixlen > 64) | |
973 | /* unusual but allowed, log it */ | |
35388783 | 974 | log_radv(NULL, "Unusual prefix length %u greater than 64", prefixlen); |
203d4df5 SS |
975 | |
976 | p->opt.in6_addr = *in6_addr; | |
977 | p->opt.prefixlen = prefixlen; | |
978 | ||
979 | return 0; | |
980 | } | |
981 | ||
17347053 | 982 | int sd_radv_route_prefix_set_lifetime(sd_radv_route_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
203d4df5 SS |
983 | assert_return(p, -EINVAL); |
984 | ||
95e104e0 YW |
985 | p->lifetime_usec = lifetime_usec; |
986 | p->valid_until = valid_until; | |
203d4df5 SS |
987 | |
988 | return 0; | |
989 | } |