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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 | 101 | |
9aad490e DT |
102 | LIST_CLEAR(prefix, ra->prefixes, sd_radv_prefix_unref); |
103 | LIST_CLEAR(prefix, ra->route_prefixes, sd_radv_route_prefix_unref); | |
69d7eba1 | 104 | |
e9c6da38 | 105 | free(ra->rdnss); |
f9aa5417 | 106 | free(ra->dnssl); |
e9c6da38 | 107 | |
204fb681 PF |
108 | radv_reset(ra); |
109 | ||
eb2f7502 | 110 | sd_event_source_unref(ra->timeout_event_source); |
204f99d2 | 111 | sd_radv_detach_event(ra); |
c4b6dda0 LP |
112 | |
113 | ra->fd = safe_close(ra->fd); | |
61a9fa8f | 114 | free(ra->ifname); |
c4b6dda0 | 115 | |
204f99d2 PF |
116 | return mfree(ra); |
117 | } | |
118 | ||
8301aa0b YW |
119 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv, sd_radv, radv_free); |
120 | ||
09457670 YW |
121 | static bool router_lifetime_is_valid(usec_t lifetime_usec) { |
122 | return lifetime_usec == 0 || | |
123 | (lifetime_usec >= RADV_MIN_ROUTER_LIFETIME_USEC && | |
124 | lifetime_usec <= RADV_MAX_ROUTER_LIFETIME_USEC); | |
125 | } | |
126 | ||
95e104e0 YW |
127 | static be32_t usec_to_be32_sec(usec_t usec) { |
128 | if (usec == USEC_INFINITY) | |
129 | /* UINT32_MAX is handled as infinity. */ | |
130 | return htobe32(UINT32_MAX); | |
131 | ||
132 | if (usec >= UINT32_MAX * USEC_PER_SEC) | |
133 | /* Finite but too large. Let's use the largest finite value. */ | |
134 | return htobe32(UINT32_MAX - 1); | |
135 | ||
136 | return htobe32(usec / USEC_PER_SEC); | |
137 | } | |
138 | ||
7003b114 | 139 | static int radv_send(sd_radv *ra, const struct in6_addr *dst, usec_t lifetime_usec) { |
77baf5ae PF |
140 | struct sockaddr_in6 dst_addr = { |
141 | .sin6_family = AF_INET6, | |
142 | .sin6_addr = IN6ADDR_ALL_NODES_MULTICAST_INIT, | |
143 | }; | |
144 | struct nd_router_advert adv = {}; | |
145 | struct { | |
146 | struct nd_opt_hdr opthdr; | |
147 | struct ether_addr slladdr; | |
148 | } _packed_ opt_mac = { | |
149 | .opthdr = { | |
150 | .nd_opt_type = ND_OPT_SOURCE_LINKADDR, | |
151 | .nd_opt_len = (sizeof(struct nd_opt_hdr) + | |
152 | sizeof(struct ether_addr) - 1) /8 + 1, | |
153 | }, | |
154 | }; | |
155 | struct nd_opt_mtu opt_mtu = { | |
156 | .nd_opt_mtu_type = ND_OPT_MTU, | |
157 | .nd_opt_mtu_len = 1, | |
158 | }; | |
203d4df5 | 159 | /* Reserve iov space for RA header, linkaddr, MTU, N prefixes, N routes, RDNSS |
6852c0f6 | 160 | and DNSSL */ |
203d4df5 | 161 | struct iovec iov[5 + ra->n_prefixes + ra->n_route_prefixes]; |
77baf5ae PF |
162 | struct msghdr msg = { |
163 | .msg_name = &dst_addr, | |
164 | .msg_namelen = sizeof(dst_addr), | |
165 | .msg_iov = iov, | |
166 | }; | |
d601b566 PF |
167 | usec_t time_now; |
168 | int r; | |
169 | ||
dc0ec5e2 | 170 | assert(ra); |
09457670 | 171 | assert(router_lifetime_is_valid(lifetime_usec)); |
dc0ec5e2 | 172 | |
ba4e0427 | 173 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
d601b566 PF |
174 | if (r < 0) |
175 | return r; | |
77baf5ae | 176 | |
94876904 | 177 | if (dst && in6_addr_is_set(dst)) |
77baf5ae | 178 | dst_addr.sin6_addr = *dst; |
88d5a3db | 179 | |
77baf5ae PF |
180 | adv.nd_ra_type = ND_ROUTER_ADVERT; |
181 | adv.nd_ra_curhoplimit = ra->hop_limit; | |
fdc4c67c | 182 | adv.nd_ra_retransmit = htobe32(ra->retransmit_msec); |
77baf5ae | 183 | adv.nd_ra_flags_reserved = ra->flags; |
09457670 YW |
184 | assert_cc(RADV_MAX_ROUTER_LIFETIME_USEC <= UINT16_MAX * USEC_PER_SEC); |
185 | adv.nd_ra_router_lifetime = htobe16(DIV_ROUND_UP(lifetime_usec, USEC_PER_SEC)); | |
5cfa2c3d | 186 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&adv, sizeof(adv)); |
77baf5ae PF |
187 | |
188 | /* MAC address is optional, either because the link does not use L2 | |
189 | addresses or load sharing is desired. See RFC 4861, Section 4.2 */ | |
ae25915d | 190 | if (!ether_addr_is_null(&ra->mac_addr)) { |
77baf5ae | 191 | opt_mac.slladdr = ra->mac_addr; |
5cfa2c3d | 192 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mac, sizeof(opt_mac)); |
77baf5ae PF |
193 | } |
194 | ||
41521417 | 195 | if (ra->mtu > 0) { |
77baf5ae | 196 | opt_mtu.nd_opt_mtu_mtu = htobe32(ra->mtu); |
5cfa2c3d | 197 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mtu, sizeof(opt_mtu)); |
77baf5ae PF |
198 | } |
199 | ||
200 | LIST_FOREACH(prefix, p, ra->prefixes) { | |
95e104e0 | 201 | usec_t lifetime_valid_usec, lifetime_preferred_usec; |
d601b566 | 202 | |
95e104e0 YW |
203 | lifetime_valid_usec = MIN(usec_sub_unsigned(p->valid_until, time_now), |
204 | p->lifetime_valid_usec); | |
205 | ||
206 | lifetime_preferred_usec = MIN3(usec_sub_unsigned(p->preferred_until, time_now), | |
207 | p->lifetime_preferred_usec, | |
208 | lifetime_valid_usec); | |
209 | ||
210 | p->opt.lifetime_valid = usec_to_be32_sec(lifetime_valid_usec); | |
211 | p->opt.lifetime_preferred = usec_to_be32_sec(lifetime_preferred_usec); | |
d601b566 | 212 | |
5cfa2c3d | 213 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&p->opt, sizeof(p->opt)); |
77baf5ae PF |
214 | } |
215 | ||
95e104e0 YW |
216 | LIST_FOREACH(prefix, rt, ra->route_prefixes) { |
217 | rt->opt.lifetime = usec_to_be32_sec(MIN(usec_sub_unsigned(rt->valid_until, time_now), | |
218 | rt->lifetime_usec)); | |
219 | ||
203d4df5 | 220 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&rt->opt, sizeof(rt->opt)); |
95e104e0 | 221 | } |
203d4df5 | 222 | |
5cfa2c3d LP |
223 | if (ra->rdnss) |
224 | iov[msg.msg_iovlen++] = IOVEC_MAKE(ra->rdnss, ra->rdnss->length * 8); | |
e9c6da38 | 225 | |
5cfa2c3d LP |
226 | if (ra->dnssl) |
227 | iov[msg.msg_iovlen++] = IOVEC_MAKE(ra->dnssl, ra->dnssl->length * 8); | |
e965d6ab | 228 | |
77baf5ae PF |
229 | if (sendmsg(ra->fd, &msg, 0) < 0) |
230 | return -errno; | |
204fb681 | 231 | |
77baf5ae | 232 | return 0; |
204fb681 PF |
233 | } |
234 | ||
88d5a3db | 235 | static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
99534007 | 236 | sd_radv *ra = ASSERT_PTR(userdata); |
88d5a3db PF |
237 | struct in6_addr src; |
238 | triple_timestamp timestamp; | |
239 | int r; | |
88d5a3db PF |
240 | |
241 | assert(s); | |
88d5a3db PF |
242 | assert(ra->event); |
243 | ||
dd6d433a | 244 | ssize_t buflen = next_datagram_size_fd(fd); |
1f2db2e3 ZJS |
245 | if (ERRNO_IS_NEG_TRANSIENT(buflen) || ERRNO_IS_NEG_DISCONNECT(buflen)) |
246 | return 0; | |
ab8a8a4e | 247 | if (buflen < 0) { |
ab8a8a4e YW |
248 | log_radv_errno(ra, buflen, "Failed to determine datagram size to read, ignoring: %m"); |
249 | return 0; | |
250 | } | |
88d5a3db | 251 | |
dd6d433a | 252 | _cleanup_free_ char *buf = new0(char, buflen); |
88d5a3db | 253 | if (!buf) |
e55a6eae | 254 | return -ENOMEM; |
88d5a3db PF |
255 | |
256 | r = icmp6_receive(fd, buf, buflen, &src, ×tamp); | |
1f2db2e3 ZJS |
257 | if (ERRNO_IS_NEG_TRANSIENT(r) || ERRNO_IS_NEG_DISCONNECT(r)) |
258 | return 0; | |
259 | if (r < 0) | |
88d5a3db PF |
260 | switch (r) { |
261 | case -EADDRNOTAVAIL: | |
84dbb3fd ZJS |
262 | log_radv(ra, "Received RS from non-link-local address %s. Ignoring", |
263 | IN6_ADDR_TO_STRING(&src)); | |
1f2db2e3 | 264 | return 0; |
88d5a3db PF |
265 | |
266 | case -EMULTIHOP: | |
35388783 | 267 | log_radv(ra, "Received RS with invalid hop limit. Ignoring."); |
1f2db2e3 | 268 | return 0; |
88d5a3db PF |
269 | |
270 | case -EPFNOSUPPORT: | |
35388783 | 271 | log_radv(ra, "Received invalid source address from ICMPv6 socket. Ignoring."); |
1f2db2e3 | 272 | return 0; |
88d5a3db PF |
273 | |
274 | default: | |
ab8a8a4e | 275 | log_radv_errno(ra, r, "Unexpected error receiving from ICMPv6 socket, ignoring: %m"); |
1f2db2e3 | 276 | return 0; |
88d5a3db PF |
277 | } |
278 | ||
cfffddea | 279 | if ((size_t) buflen < sizeof(struct nd_router_solicit)) { |
35388783 | 280 | log_radv(ra, "Too short packet received, ignoring"); |
cfffddea LP |
281 | return 0; |
282 | } | |
283 | ||
84dbb3fd | 284 | const char *addr = IN6_ADDR_TO_STRING(&src); |
88d5a3db | 285 | |
7003b114 | 286 | r = radv_send(ra, &src, ra->lifetime_usec); |
88d5a3db | 287 | if (r < 0) |
84dbb3fd | 288 | log_radv_errno(ra, r, "Unable to send solicited Router Advertisement to %s, ignoring: %m", addr); |
88d5a3db | 289 | else |
84dbb3fd | 290 | log_radv(ra, "Sent solicited Router Advertisement to %s", addr); |
88d5a3db PF |
291 | |
292 | return 0; | |
293 | } | |
294 | ||
204fb681 | 295 | static int radv_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
7003b114 | 296 | usec_t min_timeout, max_timeout, time_now, timeout; |
99534007 | 297 | sd_radv *ra = ASSERT_PTR(userdata); |
7003b114 | 298 | int r; |
204fb681 PF |
299 | |
300 | assert(s); | |
204fb681 | 301 | assert(ra->event); |
80477557 | 302 | assert(router_lifetime_is_valid(ra->lifetime_usec)); |
204fb681 | 303 | |
ba4e0427 | 304 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
204fb681 PF |
305 | if (r < 0) |
306 | goto fail; | |
307 | ||
7003b114 | 308 | r = radv_send(ra, NULL, ra->lifetime_usec); |
204fb681 | 309 | if (r < 0) |
abb977a6 | 310 | log_radv_errno(ra, r, "Unable to send Router Advertisement, ignoring: %m"); |
204fb681 PF |
311 | |
312 | /* RFC 4861, Section 6.2.4, sending initial Router Advertisements */ | |
80477557 | 313 | if (ra->ra_sent < RADV_MAX_INITIAL_RTR_ADVERTISEMENTS) |
d6fc0d67 | 314 | max_timeout = RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC; |
80477557 | 315 | else |
03ec10fd | 316 | max_timeout = RADV_DEFAULT_MAX_TIMEOUT_USEC; |
204fb681 | 317 | |
ef90b6a4 | 318 | /* RFC 4861, Section 6.2.1, lifetime must be at least MaxRtrAdvInterval, |
80477557 YW |
319 | * so lower the interval here */ |
320 | if (ra->lifetime_usec > 0) | |
321 | max_timeout = MIN(max_timeout, ra->lifetime_usec); | |
322 | ||
323 | if (max_timeout >= 9 * USEC_PER_SEC) | |
ef90b6a4 | 324 | min_timeout = max_timeout / 3; |
80477557 YW |
325 | else |
326 | min_timeout = max_timeout * 3 / 4; | |
ef90b6a4 | 327 | |
80477557 YW |
328 | /* RFC 4861, Section 6.2.1. |
329 | * MaxRtrAdvInterval MUST be no less than 4 seconds and no greater than 1800 seconds. | |
330 | * MinRtrAdvInterval MUST be no less than 3 seconds and no greater than .75 * MaxRtrAdvInterval. */ | |
331 | assert(max_timeout >= RADV_MIN_MAX_TIMEOUT_USEC); | |
332 | assert(max_timeout <= RADV_MAX_MAX_TIMEOUT_USEC); | |
333 | assert(min_timeout >= RADV_MIN_MIN_TIMEOUT_USEC); | |
334 | assert(min_timeout <= max_timeout * 3 / 4); | |
ef90b6a4 | 335 | |
80477557 | 336 | timeout = min_timeout + random_u64_range(max_timeout - min_timeout); |
5291f26d | 337 | log_radv(ra, "Next Router Advertisement in %s", FORMAT_TIMESPAN(timeout, USEC_PER_SEC)); |
204fb681 | 338 | |
807a8ede | 339 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 340 | CLOCK_BOOTTIME, |
80477557 | 341 | usec_add(time_now, timeout), MSEC_PER_SEC, |
807a8ede YW |
342 | radv_timeout, ra, |
343 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
344 | if (r < 0) |
345 | goto fail; | |
346 | ||
347 | ra->ra_sent++; | |
348 | ||
807a8ede YW |
349 | return 0; |
350 | ||
204fb681 | 351 | fail: |
290696e5 | 352 | sd_radv_stop(ra); |
204fb681 PF |
353 | |
354 | return 0; | |
355 | } | |
356 | ||
17347053 | 357 | int sd_radv_stop(sd_radv *ra) { |
204fb681 PF |
358 | int r; |
359 | ||
c8bae363 YW |
360 | if (!ra) |
361 | return 0; | |
204f99d2 | 362 | |
d6fc0d67 | 363 | if (ra->state == RADV_STATE_IDLE) |
6f8a8b84 SS |
364 | return 0; |
365 | ||
35388783 | 366 | log_radv(ra, "Stopping IPv6 Router Advertisement daemon"); |
204f99d2 | 367 | |
290696e5 YW |
368 | /* RFC 4861, Section 6.2.5, send at least one Router Advertisement |
369 | with zero lifetime */ | |
370 | r = radv_send(ra, NULL, 0); | |
371 | if (r < 0) | |
abb977a6 | 372 | log_radv_errno(ra, r, "Unable to send last Router Advertisement with router lifetime set to zero, ignoring: %m"); |
204fb681 PF |
373 | |
374 | radv_reset(ra); | |
77baf5ae | 375 | ra->fd = safe_close(ra->fd); |
d6fc0d67 | 376 | ra->state = RADV_STATE_IDLE; |
204f99d2 PF |
377 | |
378 | return 0; | |
379 | } | |
380 | ||
17347053 | 381 | int sd_radv_start(sd_radv *ra) { |
f474884c | 382 | int r; |
204fb681 | 383 | |
204f99d2 PF |
384 | assert_return(ra, -EINVAL); |
385 | assert_return(ra->event, -EINVAL); | |
386 | assert_return(ra->ifindex > 0, -EINVAL); | |
387 | ||
d6fc0d67 | 388 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
389 | return 0; |
390 | ||
807a8ede | 391 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 392 | CLOCK_BOOTTIME, |
807a8ede YW |
393 | 0, 0, |
394 | radv_timeout, ra, | |
395 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
396 | if (r < 0) |
397 | goto fail; | |
398 | ||
77baf5ae PF |
399 | r = icmp6_bind_router_advertisement(ra->ifindex); |
400 | if (r < 0) | |
401 | goto fail; | |
402 | ||
403 | ra->fd = r; | |
88d5a3db PF |
404 | |
405 | r = sd_event_add_io(ra->event, &ra->recv_event_source, ra->fd, EPOLLIN, radv_recv, ra); | |
406 | if (r < 0) | |
407 | goto fail; | |
408 | ||
409 | r = sd_event_source_set_priority(ra->recv_event_source, ra->event_priority); | |
410 | if (r < 0) | |
411 | goto fail; | |
412 | ||
413 | (void) sd_event_source_set_description(ra->recv_event_source, "radv-receive-message"); | |
77baf5ae | 414 | |
d6fc0d67 | 415 | ra->state = RADV_STATE_ADVERTISING; |
204f99d2 | 416 | |
35388783 | 417 | log_radv(ra, "Started IPv6 Router Advertisement daemon"); |
204f99d2 PF |
418 | |
419 | return 0; | |
204fb681 PF |
420 | |
421 | fail: | |
422 | radv_reset(ra); | |
423 | ||
424 | return r; | |
204f99d2 PF |
425 | } |
426 | ||
17347053 | 427 | int sd_radv_set_ifindex(sd_radv *ra, int ifindex) { |
204f99d2 | 428 | assert_return(ra, -EINVAL); |
7fa69c0a | 429 | assert_return(ifindex > 0, -EINVAL); |
204f99d2 | 430 | |
d6fc0d67 | 431 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
432 | return -EBUSY; |
433 | ||
434 | ra->ifindex = ifindex; | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
61a9fa8f YW |
439 | int sd_radv_set_ifname(sd_radv *ra, const char *ifname) { |
440 | assert_return(ra, -EINVAL); | |
441 | assert_return(ifname, -EINVAL); | |
442 | ||
443 | if (!ifname_valid_full(ifname, IFNAME_VALID_ALTERNATIVE)) | |
444 | return -EINVAL; | |
445 | ||
446 | return free_and_strdup(&ra->ifname, ifname); | |
447 | } | |
448 | ||
5977b71f YW |
449 | int sd_radv_get_ifname(sd_radv *ra, const char **ret) { |
450 | int r; | |
451 | ||
452 | assert_return(ra, -EINVAL); | |
61a9fa8f | 453 | |
5977b71f YW |
454 | r = get_ifname(ra->ifindex, &ra->ifname); |
455 | if (r < 0) | |
456 | return r; | |
457 | ||
458 | if (ret) | |
459 | *ret = ra->ifname; | |
460 | ||
461 | return 0; | |
61a9fa8f YW |
462 | } |
463 | ||
17347053 | 464 | int sd_radv_set_mac(sd_radv *ra, const struct ether_addr *mac_addr) { |
204f99d2 PF |
465 | assert_return(ra, -EINVAL); |
466 | ||
d6fc0d67 | 467 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
468 | return -EBUSY; |
469 | ||
470 | if (mac_addr) | |
471 | ra->mac_addr = *mac_addr; | |
472 | else | |
473 | zero(ra->mac_addr); | |
474 | ||
475 | return 0; | |
476 | } | |
477 | ||
17347053 | 478 | int sd_radv_set_mtu(sd_radv *ra, uint32_t mtu) { |
204f99d2 PF |
479 | assert_return(ra, -EINVAL); |
480 | assert_return(mtu >= 1280, -EINVAL); | |
481 | ||
204f99d2 PF |
482 | ra->mtu = mtu; |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
17347053 | 487 | int sd_radv_set_hop_limit(sd_radv *ra, uint8_t hop_limit) { |
204f99d2 PF |
488 | assert_return(ra, -EINVAL); |
489 | ||
d6fc0d67 | 490 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
491 | return -EBUSY; |
492 | ||
493 | ra->hop_limit = hop_limit; | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
fdc4c67c SS |
498 | int sd_radv_set_retransmit(sd_radv *ra, uint32_t retransmit_msec) { |
499 | assert_return(ra, -EINVAL); | |
500 | ||
501 | if (ra->state != RADV_STATE_IDLE) | |
502 | return -EBUSY; | |
503 | ||
504 | ra->retransmit_msec = retransmit_msec; | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
17347053 | 509 | int sd_radv_set_router_lifetime(sd_radv *ra, uint64_t lifetime_usec) { |
204f99d2 PF |
510 | assert_return(ra, -EINVAL); |
511 | ||
d6fc0d67 | 512 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
513 | return -EBUSY; |
514 | ||
09457670 YW |
515 | if (!router_lifetime_is_valid(lifetime_usec)) |
516 | return -EINVAL; | |
517 | ||
ac138551 YW |
518 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
519 | * to (00) by the sender..." */ | |
7003b114 | 520 | if (lifetime_usec == 0 && |
204f99d2 | 521 | (ra->flags & (0x3 << 3)) != (SD_NDISC_PREFERENCE_MEDIUM << 3)) |
09457670 | 522 | return -EINVAL; |
204f99d2 | 523 | |
7003b114 | 524 | ra->lifetime_usec = lifetime_usec; |
204f99d2 PF |
525 | |
526 | return 0; | |
527 | } | |
528 | ||
17347053 | 529 | int sd_radv_set_managed_information(sd_radv *ra, int managed) { |
204f99d2 PF |
530 | assert_return(ra, -EINVAL); |
531 | ||
d6fc0d67 | 532 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
533 | return -EBUSY; |
534 | ||
535 | SET_FLAG(ra->flags, ND_RA_FLAG_MANAGED, managed); | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
17347053 | 540 | int sd_radv_set_other_information(sd_radv *ra, int other) { |
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_OTHER, other); | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
17347053 | 551 | int sd_radv_set_preference(sd_radv *ra, unsigned preference) { |
204f99d2 PF |
552 | assert_return(ra, -EINVAL); |
553 | assert_return(IN_SET(preference, | |
554 | SD_NDISC_PREFERENCE_LOW, | |
555 | SD_NDISC_PREFERENCE_MEDIUM, | |
556 | SD_NDISC_PREFERENCE_HIGH), -EINVAL); | |
557 | ||
dd1b1870 YW |
558 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
559 | * to (00) by the sender..." */ | |
7003b114 | 560 | if (ra->lifetime_usec == 0 && preference != SD_NDISC_PREFERENCE_MEDIUM) |
dd1b1870 YW |
561 | return -EINVAL; |
562 | ||
204f99d2 PF |
563 | ra->flags = (ra->flags & ~(0x3 << 3)) | (preference << 3); |
564 | ||
dd1b1870 | 565 | return 0; |
204f99d2 PF |
566 | } |
567 | ||
17347053 | 568 | int sd_radv_add_prefix(sd_radv *ra, sd_radv_prefix *p) { |
03677889 | 569 | sd_radv_prefix *found = NULL; |
d601b566 | 570 | int r; |
204f99d2 PF |
571 | |
572 | assert_return(ra, -EINVAL); | |
acbb5500 | 573 | assert_return(p, -EINVAL); |
204f99d2 | 574 | |
59ea6e57 | 575 | /* Refuse prefixes that don't have a prefix set */ |
94876904 | 576 | if (in6_addr_is_null(&p->opt.in6_addr)) |
59ea6e57 LP |
577 | return -ENOEXEC; |
578 | ||
c71384a9 | 579 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
5380707a | 580 | |
204f99d2 | 581 | LIST_FOREACH(prefix, cur, ra->prefixes) { |
204f99d2 | 582 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 583 | (const union in_addr_union*) &cur->opt.in6_addr, |
204f99d2 | 584 | cur->opt.prefixlen, |
c633628d | 585 | (const union in_addr_union*) &p->opt.in6_addr, |
204f99d2 | 586 | p->opt.prefixlen); |
5380707a YW |
587 | if (r < 0) |
588 | return r; | |
589 | if (r == 0) | |
590 | continue; | |
204f99d2 | 591 | |
95e104e0 | 592 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 593 | found = cur; |
b9f27a05 | 594 | break; |
95e104e0 | 595 | } |
d601b566 | 596 | |
35388783 | 597 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 598 | "IPv6 prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
599 | addr_p, |
600 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
204f99d2 PF |
601 | } |
602 | ||
56aa5143 | 603 | if (found) { |
b9f27a05 YW |
604 | /* p and cur may be equivalent. First increment the reference counter. */ |
605 | sd_radv_prefix_ref(p); | |
606 | ||
607 | /* Then, remove the old entry. */ | |
56aa5143 YW |
608 | LIST_REMOVE(prefix, ra->prefixes, found); |
609 | sd_radv_prefix_unref(found); | |
b9f27a05 YW |
610 | |
611 | /* Finally, add the new entry. */ | |
612 | LIST_APPEND(prefix, ra->prefixes, p); | |
613 | ||
614 | log_radv(ra, "Updated/replaced IPv6 prefix %s (preferred: %s, valid: %s)", | |
c71384a9 | 615 | addr_p, |
b9f27a05 YW |
616 | FORMAT_TIMESPAN(p->lifetime_preferred_usec, USEC_PER_SEC), |
617 | FORMAT_TIMESPAN(p->lifetime_valid_usec, USEC_PER_SEC)); | |
618 | } else { | |
619 | /* The prefix is new. Let's simply add it. */ | |
620 | ||
621 | sd_radv_prefix_ref(p); | |
622 | LIST_APPEND(prefix, ra->prefixes, p); | |
623 | ra->n_prefixes++; | |
204f99d2 | 624 | |
c71384a9 | 625 | log_radv(ra, "Added prefix %s", addr_p); |
b9f27a05 | 626 | } |
059d7b6e YW |
627 | |
628 | if (ra->state == RADV_STATE_IDLE) | |
629 | return 0; | |
630 | ||
059d7b6e | 631 | if (ra->ra_sent == 0) |
d601b566 | 632 | return 0; |
d601b566 | 633 | |
97efde65 | 634 | /* If RAs have already been sent, send an RA immediately to announce the newly-added prefix */ |
059d7b6e YW |
635 | r = radv_send(ra, NULL, ra->lifetime_usec); |
636 | if (r < 0) | |
abb977a6 | 637 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added prefix %s, ignoring: %m", addr_p); |
059d7b6e | 638 | else |
c71384a9 | 639 | log_radv(ra, "Sent Router Advertisement for added/updated prefix %s.", addr_p); |
97efde65 | 640 | |
204f99d2 PF |
641 | return 0; |
642 | } | |
643 | ||
95931532 YW |
644 | void sd_radv_remove_prefix( |
645 | sd_radv *ra, | |
646 | const struct in6_addr *prefix, | |
647 | unsigned char prefixlen) { | |
34c169c4 | 648 | |
95931532 YW |
649 | if (!ra) |
650 | return; | |
34c169c4 | 651 | |
95931532 YW |
652 | if (!prefix) |
653 | return; | |
654 | ||
655 | LIST_FOREACH(prefix, cur, ra->prefixes) { | |
34c169c4 PF |
656 | if (prefixlen != cur->opt.prefixlen) |
657 | continue; | |
658 | ||
94876904 | 659 | if (!in6_addr_equal(prefix, &cur->opt.in6_addr)) |
34c169c4 PF |
660 | continue; |
661 | ||
662 | LIST_REMOVE(prefix, ra->prefixes, cur); | |
663 | ra->n_prefixes--; | |
62bbbedf | 664 | sd_radv_prefix_unref(cur); |
95931532 | 665 | return; |
34c169c4 | 666 | } |
34c169c4 PF |
667 | } |
668 | ||
17347053 | 669 | int sd_radv_add_route_prefix(sd_radv *ra, sd_radv_route_prefix *p) { |
03677889 | 670 | sd_radv_route_prefix *found = NULL; |
203d4df5 SS |
671 | int r; |
672 | ||
673 | assert_return(ra, -EINVAL); | |
acbb5500 | 674 | assert_return(p, -EINVAL); |
203d4df5 | 675 | |
c71384a9 | 676 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
203d4df5 SS |
677 | |
678 | LIST_FOREACH(prefix, cur, ra->route_prefixes) { | |
203d4df5 | 679 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 680 | (const union in_addr_union*) &cur->opt.in6_addr, |
203d4df5 | 681 | cur->opt.prefixlen, |
c633628d | 682 | (const union in_addr_union*) &p->opt.in6_addr, |
203d4df5 SS |
683 | p->opt.prefixlen); |
684 | if (r < 0) | |
685 | return r; | |
686 | if (r == 0) | |
687 | continue; | |
688 | ||
95e104e0 | 689 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 690 | found = cur; |
b9f27a05 | 691 | break; |
95e104e0 | 692 | } |
203d4df5 | 693 | |
35388783 | 694 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 695 | "IPv6 route prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
696 | addr_p, |
697 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
203d4df5 SS |
698 | } |
699 | ||
56aa5143 | 700 | if (found) { |
b9f27a05 YW |
701 | /* p and cur may be equivalent. First increment the reference counter. */ |
702 | sd_radv_route_prefix_ref(p); | |
703 | ||
704 | /* Then, remove the old entry. */ | |
56aa5143 YW |
705 | LIST_REMOVE(prefix, ra->route_prefixes, found); |
706 | sd_radv_route_prefix_unref(found); | |
b9f27a05 YW |
707 | |
708 | /* Finally, add the new entry. */ | |
709 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
710 | ||
711 | log_radv(ra, "Updated/replaced IPv6 route prefix %s (lifetime: %s)", | |
712 | strna(addr_p), | |
713 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
714 | } else { | |
715 | /* The route prefix is new. Let's simply add it. */ | |
716 | ||
717 | sd_radv_route_prefix_ref(p); | |
718 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
719 | ra->n_route_prefixes++; | |
720 | ||
721 | log_radv(ra, "Added route prefix %s", strna(addr_p)); | |
722 | } | |
059d7b6e YW |
723 | |
724 | if (ra->state == RADV_STATE_IDLE) | |
725 | return 0; | |
726 | ||
059d7b6e | 727 | if (ra->ra_sent == 0) |
203d4df5 | 728 | return 0; |
203d4df5 | 729 | |
97efde65 | 730 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ |
059d7b6e YW |
731 | r = radv_send(ra, NULL, ra->lifetime_usec); |
732 | if (r < 0) | |
abb977a6 | 733 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added route prefix %s, ignoring: %m", |
b9f27a05 | 734 | strna(addr_p)); |
059d7b6e | 735 | else |
b9f27a05 | 736 | log_radv(ra, "Sent Router Advertisement for added route prefix %s.", strna(addr_p)); |
97efde65 | 737 | |
203d4df5 SS |
738 | return 0; |
739 | } | |
740 | ||
faaf3d66 YW |
741 | int sd_radv_set_rdnss( |
742 | sd_radv *ra, | |
743 | uint32_t lifetime, | |
744 | const struct in6_addr *dns, | |
745 | size_t n_dns) { | |
746 | ||
e9c6da38 PF |
747 | _cleanup_free_ struct sd_radv_opt_dns *opt_rdnss = NULL; |
748 | size_t len; | |
749 | ||
750 | assert_return(ra, -EINVAL); | |
751 | assert_return(n_dns < 128, -EINVAL); | |
752 | ||
753 | if (!dns || n_dns == 0) { | |
754 | ra->rdnss = mfree(ra->rdnss); | |
755 | ra->n_rdnss = 0; | |
756 | ||
757 | return 0; | |
758 | } | |
759 | ||
760 | len = sizeof(struct sd_radv_opt_dns) + sizeof(struct in6_addr) * n_dns; | |
761 | ||
762 | opt_rdnss = malloc0(len); | |
763 | if (!opt_rdnss) | |
764 | return -ENOMEM; | |
765 | ||
d6fc0d67 | 766 | opt_rdnss->type = RADV_OPT_RDNSS; |
e9c6da38 PF |
767 | opt_rdnss->length = len / 8; |
768 | opt_rdnss->lifetime = htobe32(lifetime); | |
769 | ||
770 | memcpy(opt_rdnss + 1, dns, n_dns * sizeof(struct in6_addr)); | |
771 | ||
1cc6c93a | 772 | free_and_replace(ra->rdnss, opt_rdnss); |
e9c6da38 PF |
773 | |
774 | ra->n_rdnss = n_dns; | |
775 | ||
776 | return 0; | |
777 | } | |
778 | ||
faaf3d66 YW |
779 | int sd_radv_set_dnssl( |
780 | sd_radv *ra, | |
781 | uint32_t lifetime, | |
782 | char **search_list) { | |
783 | ||
e965d6ab PF |
784 | _cleanup_free_ struct sd_radv_opt_dns *opt_dnssl = NULL; |
785 | size_t len = 0; | |
e965d6ab PF |
786 | uint8_t *p; |
787 | ||
788 | assert_return(ra, -EINVAL); | |
789 | ||
97d7974b | 790 | if (strv_isempty(search_list)) { |
e965d6ab | 791 | ra->dnssl = mfree(ra->dnssl); |
e965d6ab PF |
792 | return 0; |
793 | } | |
794 | ||
795 | STRV_FOREACH(s, search_list) | |
796 | len += strlen(*s) + 2; | |
797 | ||
798 | len = (sizeof(struct sd_radv_opt_dns) + len + 7) & ~0x7; | |
799 | ||
800 | opt_dnssl = malloc0(len); | |
801 | if (!opt_dnssl) | |
802 | return -ENOMEM; | |
803 | ||
d6fc0d67 | 804 | opt_dnssl->type = RADV_OPT_DNSSL; |
e965d6ab PF |
805 | opt_dnssl->length = len / 8; |
806 | opt_dnssl->lifetime = htobe32(lifetime); | |
807 | ||
808 | p = (uint8_t *)(opt_dnssl + 1); | |
809 | len -= sizeof(struct sd_radv_opt_dns); | |
810 | ||
811 | STRV_FOREACH(s, search_list) { | |
812 | int r; | |
813 | ||
814 | r = dns_name_to_wire_format(*s, p, len, false); | |
815 | if (r < 0) | |
816 | return r; | |
817 | ||
818 | if (len < (size_t)r) | |
819 | return -ENOBUFS; | |
820 | ||
821 | p += r; | |
822 | len -= r; | |
823 | } | |
824 | ||
1cc6c93a | 825 | free_and_replace(ra->dnssl, opt_dnssl); |
e965d6ab PF |
826 | |
827 | return 0; | |
828 | } | |
829 | ||
17347053 | 830 | int sd_radv_prefix_new(sd_radv_prefix **ret) { |
d2c8eed2 | 831 | sd_radv_prefix *p; |
04473969 PF |
832 | |
833 | assert_return(ret, -EINVAL); | |
834 | ||
d2c8eed2 | 835 | p = new(sd_radv_prefix, 1); |
04473969 PF |
836 | if (!p) |
837 | return -ENOMEM; | |
838 | ||
d2c8eed2 LP |
839 | *p = (sd_radv_prefix) { |
840 | .n_ref = 1, | |
04473969 | 841 | |
d2c8eed2 LP |
842 | .opt.type = ND_OPT_PREFIX_INFORMATION, |
843 | .opt.length = (sizeof(p->opt) - 1)/8 + 1, | |
844 | .opt.prefixlen = 64, | |
04473969 | 845 | |
d2c8eed2 LP |
846 | /* RFC 4861, Section 6.2.1 */ |
847 | .opt.flags = ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO, | |
204f99d2 | 848 | |
d951507d YW |
849 | .lifetime_valid_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
850 | .lifetime_preferred_usec = RADV_DEFAULT_PREFERRED_LIFETIME_USEC, | |
95e104e0 YW |
851 | .valid_until = USEC_INFINITY, |
852 | .preferred_until = USEC_INFINITY, | |
d2c8eed2 | 853 | }; |
04473969 | 854 | |
d2c8eed2 | 855 | *ret = p; |
04473969 PF |
856 | return 0; |
857 | } | |
858 | ||
8301aa0b | 859 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_prefix, sd_radv_prefix, mfree); |
04473969 | 860 | |
faaf3d66 YW |
861 | int sd_radv_prefix_set_prefix( |
862 | sd_radv_prefix *p, | |
863 | const struct in6_addr *in6_addr, | |
864 | unsigned char prefixlen) { | |
865 | ||
04473969 PF |
866 | assert_return(p, -EINVAL); |
867 | assert_return(in6_addr, -EINVAL); | |
868 | ||
869 | if (prefixlen < 3 || prefixlen > 128) | |
870 | return -EINVAL; | |
871 | ||
872 | if (prefixlen > 64) | |
873 | /* unusual but allowed, log it */ | |
35388783 | 874 | log_radv(NULL, "Unusual prefix length %d greater than 64", prefixlen); |
04473969 PF |
875 | |
876 | p->opt.in6_addr = *in6_addr; | |
877 | p->opt.prefixlen = prefixlen; | |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
faaf3d66 YW |
882 | int sd_radv_prefix_get_prefix( |
883 | sd_radv_prefix *p, | |
884 | struct in6_addr *ret_in6_addr, | |
885 | unsigned char *ret_prefixlen) { | |
886 | ||
34332af2 SS |
887 | assert_return(p, -EINVAL); |
888 | assert_return(ret_in6_addr, -EINVAL); | |
889 | assert_return(ret_prefixlen, -EINVAL); | |
890 | ||
891 | *ret_in6_addr = p->opt.in6_addr; | |
892 | *ret_prefixlen = p->opt.prefixlen; | |
893 | ||
894 | return 0; | |
895 | } | |
896 | ||
17347053 | 897 | int sd_radv_prefix_set_onlink(sd_radv_prefix *p, int onlink) { |
04473969 PF |
898 | assert_return(p, -EINVAL); |
899 | ||
900 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, onlink); | |
901 | ||
902 | return 0; | |
903 | } | |
904 | ||
faaf3d66 | 905 | int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix *p, int address_autoconfiguration) { |
04473969 PF |
906 | assert_return(p, -EINVAL); |
907 | ||
908 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, address_autoconfiguration); | |
909 | ||
910 | return 0; | |
911 | } | |
912 | ||
17347053 | 913 | int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
914 | assert_return(p, -EINVAL); |
915 | ||
95e104e0 YW |
916 | p->lifetime_valid_usec = lifetime_usec; |
917 | p->valid_until = valid_until; | |
04473969 PF |
918 | |
919 | return 0; | |
920 | } | |
921 | ||
17347053 | 922 | int sd_radv_prefix_set_preferred_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_preferred_usec = lifetime_usec; |
926 | p->preferred_until = valid_until; | |
04473969 PF |
927 | |
928 | return 0; | |
929 | } | |
203d4df5 | 930 | |
17347053 | 931 | int sd_radv_route_prefix_new(sd_radv_route_prefix **ret) { |
203d4df5 SS |
932 | sd_radv_route_prefix *p; |
933 | ||
934 | assert_return(ret, -EINVAL); | |
935 | ||
936 | p = new(sd_radv_route_prefix, 1); | |
937 | if (!p) | |
938 | return -ENOMEM; | |
939 | ||
940 | *p = (sd_radv_route_prefix) { | |
941 | .n_ref = 1, | |
942 | ||
d6fc0d67 | 943 | .opt.type = RADV_OPT_ROUTE_INFORMATION, |
203d4df5 SS |
944 | .opt.length = DIV_ROUND_UP(sizeof(p->opt), 8), |
945 | .opt.prefixlen = 64, | |
946 | ||
d951507d | 947 | .lifetime_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
95e104e0 | 948 | .valid_until = USEC_INFINITY, |
203d4df5 SS |
949 | }; |
950 | ||
951 | *ret = p; | |
952 | return 0; | |
953 | } | |
954 | ||
955 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_route_prefix, sd_radv_route_prefix, mfree); | |
956 | ||
faaf3d66 YW |
957 | int sd_radv_route_prefix_set_prefix( |
958 | sd_radv_route_prefix *p, | |
959 | const struct in6_addr *in6_addr, | |
960 | unsigned char prefixlen) { | |
961 | ||
203d4df5 SS |
962 | assert_return(p, -EINVAL); |
963 | assert_return(in6_addr, -EINVAL); | |
964 | ||
965 | if (prefixlen > 128) | |
966 | return -EINVAL; | |
967 | ||
968 | if (prefixlen > 64) | |
969 | /* unusual but allowed, log it */ | |
35388783 | 970 | log_radv(NULL, "Unusual prefix length %u greater than 64", prefixlen); |
203d4df5 SS |
971 | |
972 | p->opt.in6_addr = *in6_addr; | |
973 | p->opt.prefixlen = prefixlen; | |
974 | ||
975 | return 0; | |
976 | } | |
977 | ||
17347053 | 978 | int sd_radv_route_prefix_set_lifetime(sd_radv_route_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
203d4df5 SS |
979 | assert_return(p, -EINVAL); |
980 | ||
95e104e0 YW |
981 | p->lifetime_usec = lifetime_usec; |
982 | p->valid_until = valid_until; | |
203d4df5 SS |
983 | |
984 | return 0; | |
985 | } |