]>
Commit | Line | Data |
---|---|---|
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" |
1925f829 | 28 | #include "unaligned.h" |
04473969 | 29 | |
17347053 | 30 | int sd_radv_new(sd_radv **ret) { |
204f99d2 PF |
31 | _cleanup_(sd_radv_unrefp) sd_radv *ra = NULL; |
32 | ||
33 | assert_return(ret, -EINVAL); | |
34 | ||
78f9d24f | 35 | ra = new(sd_radv, 1); |
204f99d2 PF |
36 | if (!ra) |
37 | return -ENOMEM; | |
38 | ||
78f9d24f YW |
39 | *ra = (sd_radv) { |
40 | .n_ref = 1, | |
254d1313 | 41 | .fd = -EBADF, |
72db0a71 | 42 | .lifetime_usec = RADV_DEFAULT_ROUTER_LIFETIME_USEC, |
78f9d24f | 43 | }; |
204f99d2 | 44 | |
1cc6c93a | 45 | *ret = TAKE_PTR(ra); |
204f99d2 PF |
46 | |
47 | return 0; | |
48 | } | |
49 | ||
17347053 | 50 | int sd_radv_attach_event(sd_radv *ra, sd_event *event, int64_t priority) { |
204f99d2 PF |
51 | int r; |
52 | ||
53 | assert_return(ra, -EINVAL); | |
54 | assert_return(!ra->event, -EBUSY); | |
55 | ||
56 | if (event) | |
57 | ra->event = sd_event_ref(event); | |
58 | else { | |
59 | r = sd_event_default(&ra->event); | |
60 | if (r < 0) | |
61 | return 0; | |
62 | } | |
63 | ||
64 | ra->event_priority = priority; | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
17347053 | 69 | int sd_radv_detach_event(sd_radv *ra) { |
204f99d2 PF |
70 | |
71 | assert_return(ra, -EINVAL); | |
72 | ||
73 | ra->event = sd_event_unref(ra->event); | |
74 | return 0; | |
75 | } | |
76 | ||
17347053 | 77 | sd_event *sd_radv_get_event(sd_radv *ra) { |
204f99d2 PF |
78 | assert_return(ra, NULL); |
79 | ||
80 | return ra->event; | |
81 | } | |
82 | ||
17347053 | 83 | int sd_radv_is_running(sd_radv *ra) { |
96fe813c YW |
84 | assert_return(ra, false); |
85 | ||
d6fc0d67 | 86 | return ra->state != RADV_STATE_IDLE; |
96fe813c YW |
87 | } |
88 | ||
204fb681 | 89 | static void radv_reset(sd_radv *ra) { |
c4b6dda0 | 90 | assert(ra); |
204fb681 | 91 | |
807a8ede | 92 | (void) event_source_disable(ra->timeout_event_source); |
204fb681 | 93 | |
eb2f7502 | 94 | ra->recv_event_source = sd_event_source_disable_unref(ra->recv_event_source); |
88d5a3db | 95 | |
204fb681 PF |
96 | ra->ra_sent = 0; |
97 | } | |
98 | ||
8301aa0b | 99 | static sd_radv *radv_free(sd_radv *ra) { |
e866e17b LP |
100 | if (!ra) |
101 | return NULL; | |
204f99d2 | 102 | |
9aad490e DT |
103 | LIST_CLEAR(prefix, ra->prefixes, sd_radv_prefix_unref); |
104 | LIST_CLEAR(prefix, ra->route_prefixes, sd_radv_route_prefix_unref); | |
1a6b1214 | 105 | LIST_CLEAR(prefix, ra->pref64_prefixes, sd_radv_pref64_prefix_unref); |
69d7eba1 | 106 | |
e9c6da38 | 107 | free(ra->rdnss); |
f9aa5417 | 108 | free(ra->dnssl); |
e9c6da38 | 109 | |
204fb681 PF |
110 | radv_reset(ra); |
111 | ||
eb2f7502 | 112 | sd_event_source_unref(ra->timeout_event_source); |
204f99d2 | 113 | sd_radv_detach_event(ra); |
c4b6dda0 LP |
114 | |
115 | ra->fd = safe_close(ra->fd); | |
61a9fa8f | 116 | free(ra->ifname); |
c4b6dda0 | 117 | |
204f99d2 PF |
118 | return mfree(ra); |
119 | } | |
120 | ||
8301aa0b YW |
121 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv, sd_radv, radv_free); |
122 | ||
09457670 YW |
123 | static bool router_lifetime_is_valid(usec_t lifetime_usec) { |
124 | return lifetime_usec == 0 || | |
125 | (lifetime_usec >= RADV_MIN_ROUTER_LIFETIME_USEC && | |
126 | lifetime_usec <= RADV_MAX_ROUTER_LIFETIME_USEC); | |
127 | } | |
128 | ||
95e104e0 YW |
129 | static be32_t usec_to_be32_sec(usec_t usec) { |
130 | if (usec == USEC_INFINITY) | |
131 | /* UINT32_MAX is handled as infinity. */ | |
132 | return htobe32(UINT32_MAX); | |
133 | ||
134 | if (usec >= UINT32_MAX * USEC_PER_SEC) | |
135 | /* Finite but too large. Let's use the largest finite value. */ | |
136 | return htobe32(UINT32_MAX - 1); | |
137 | ||
138 | return htobe32(usec / USEC_PER_SEC); | |
139 | } | |
140 | ||
7003b114 | 141 | static int radv_send(sd_radv *ra, const struct in6_addr *dst, usec_t lifetime_usec) { |
77baf5ae PF |
142 | struct sockaddr_in6 dst_addr = { |
143 | .sin6_family = AF_INET6, | |
144 | .sin6_addr = IN6ADDR_ALL_NODES_MULTICAST_INIT, | |
145 | }; | |
146 | struct nd_router_advert adv = {}; | |
147 | struct { | |
148 | struct nd_opt_hdr opthdr; | |
149 | struct ether_addr slladdr; | |
150 | } _packed_ opt_mac = { | |
151 | .opthdr = { | |
152 | .nd_opt_type = ND_OPT_SOURCE_LINKADDR, | |
153 | .nd_opt_len = (sizeof(struct nd_opt_hdr) + | |
154 | sizeof(struct ether_addr) - 1) /8 + 1, | |
155 | }, | |
156 | }; | |
157 | struct nd_opt_mtu opt_mtu = { | |
158 | .nd_opt_mtu_type = ND_OPT_MTU, | |
159 | .nd_opt_mtu_len = 1, | |
160 | }; | |
203d4df5 | 161 | /* Reserve iov space for RA header, linkaddr, MTU, N prefixes, N routes, RDNSS |
6852c0f6 | 162 | and DNSSL */ |
203d4df5 | 163 | struct iovec iov[5 + ra->n_prefixes + ra->n_route_prefixes]; |
77baf5ae PF |
164 | struct msghdr msg = { |
165 | .msg_name = &dst_addr, | |
166 | .msg_namelen = sizeof(dst_addr), | |
167 | .msg_iov = iov, | |
168 | }; | |
d601b566 PF |
169 | usec_t time_now; |
170 | int r; | |
171 | ||
dc0ec5e2 | 172 | assert(ra); |
09457670 | 173 | assert(router_lifetime_is_valid(lifetime_usec)); |
dc0ec5e2 | 174 | |
ba4e0427 | 175 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
d601b566 PF |
176 | if (r < 0) |
177 | return r; | |
77baf5ae | 178 | |
94876904 | 179 | if (dst && in6_addr_is_set(dst)) |
77baf5ae | 180 | dst_addr.sin6_addr = *dst; |
88d5a3db | 181 | |
77baf5ae PF |
182 | adv.nd_ra_type = ND_ROUTER_ADVERT; |
183 | adv.nd_ra_curhoplimit = ra->hop_limit; | |
fdc4c67c | 184 | adv.nd_ra_retransmit = htobe32(ra->retransmit_msec); |
77baf5ae | 185 | adv.nd_ra_flags_reserved = ra->flags; |
09457670 YW |
186 | assert_cc(RADV_MAX_ROUTER_LIFETIME_USEC <= UINT16_MAX * USEC_PER_SEC); |
187 | adv.nd_ra_router_lifetime = htobe16(DIV_ROUND_UP(lifetime_usec, USEC_PER_SEC)); | |
5cfa2c3d | 188 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&adv, sizeof(adv)); |
77baf5ae PF |
189 | |
190 | /* MAC address is optional, either because the link does not use L2 | |
191 | addresses or load sharing is desired. See RFC 4861, Section 4.2 */ | |
ae25915d | 192 | if (!ether_addr_is_null(&ra->mac_addr)) { |
77baf5ae | 193 | opt_mac.slladdr = ra->mac_addr; |
5cfa2c3d | 194 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mac, sizeof(opt_mac)); |
77baf5ae PF |
195 | } |
196 | ||
41521417 | 197 | if (ra->mtu > 0) { |
77baf5ae | 198 | opt_mtu.nd_opt_mtu_mtu = htobe32(ra->mtu); |
5cfa2c3d | 199 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mtu, sizeof(opt_mtu)); |
77baf5ae PF |
200 | } |
201 | ||
202 | LIST_FOREACH(prefix, p, ra->prefixes) { | |
95e104e0 | 203 | usec_t lifetime_valid_usec, lifetime_preferred_usec; |
d601b566 | 204 | |
95e104e0 YW |
205 | lifetime_valid_usec = MIN(usec_sub_unsigned(p->valid_until, time_now), |
206 | p->lifetime_valid_usec); | |
207 | ||
208 | lifetime_preferred_usec = MIN3(usec_sub_unsigned(p->preferred_until, time_now), | |
209 | p->lifetime_preferred_usec, | |
210 | lifetime_valid_usec); | |
211 | ||
212 | p->opt.lifetime_valid = usec_to_be32_sec(lifetime_valid_usec); | |
213 | p->opt.lifetime_preferred = usec_to_be32_sec(lifetime_preferred_usec); | |
d601b566 | 214 | |
5cfa2c3d | 215 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&p->opt, sizeof(p->opt)); |
77baf5ae PF |
216 | } |
217 | ||
95e104e0 YW |
218 | LIST_FOREACH(prefix, rt, ra->route_prefixes) { |
219 | rt->opt.lifetime = usec_to_be32_sec(MIN(usec_sub_unsigned(rt->valid_until, time_now), | |
220 | rt->lifetime_usec)); | |
221 | ||
203d4df5 | 222 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&rt->opt, sizeof(rt->opt)); |
95e104e0 | 223 | } |
203d4df5 | 224 | |
1925f829 SS |
225 | LIST_FOREACH(prefix, p, ra->pref64_prefixes) |
226 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&p->opt, sizeof(p->opt)); | |
227 | ||
5cfa2c3d LP |
228 | if (ra->rdnss) |
229 | iov[msg.msg_iovlen++] = IOVEC_MAKE(ra->rdnss, ra->rdnss->length * 8); | |
e9c6da38 | 230 | |
5cfa2c3d LP |
231 | if (ra->dnssl) |
232 | iov[msg.msg_iovlen++] = IOVEC_MAKE(ra->dnssl, ra->dnssl->length * 8); | |
e965d6ab | 233 | |
77baf5ae PF |
234 | if (sendmsg(ra->fd, &msg, 0) < 0) |
235 | return -errno; | |
204fb681 | 236 | |
77baf5ae | 237 | return 0; |
204fb681 PF |
238 | } |
239 | ||
88d5a3db | 240 | static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
99534007 | 241 | sd_radv *ra = ASSERT_PTR(userdata); |
88d5a3db PF |
242 | struct in6_addr src; |
243 | triple_timestamp timestamp; | |
244 | int r; | |
88d5a3db PF |
245 | |
246 | assert(s); | |
88d5a3db PF |
247 | assert(ra->event); |
248 | ||
dd6d433a | 249 | ssize_t buflen = next_datagram_size_fd(fd); |
1f2db2e3 ZJS |
250 | if (ERRNO_IS_NEG_TRANSIENT(buflen) || ERRNO_IS_NEG_DISCONNECT(buflen)) |
251 | return 0; | |
ab8a8a4e | 252 | if (buflen < 0) { |
ab8a8a4e YW |
253 | log_radv_errno(ra, buflen, "Failed to determine datagram size to read, ignoring: %m"); |
254 | return 0; | |
255 | } | |
88d5a3db | 256 | |
dd6d433a | 257 | _cleanup_free_ char *buf = new0(char, buflen); |
88d5a3db | 258 | if (!buf) |
e55a6eae | 259 | return -ENOMEM; |
88d5a3db PF |
260 | |
261 | r = icmp6_receive(fd, buf, buflen, &src, ×tamp); | |
1f2db2e3 ZJS |
262 | if (ERRNO_IS_NEG_TRANSIENT(r) || ERRNO_IS_NEG_DISCONNECT(r)) |
263 | return 0; | |
264 | if (r < 0) | |
88d5a3db PF |
265 | switch (r) { |
266 | case -EADDRNOTAVAIL: | |
84dbb3fd ZJS |
267 | log_radv(ra, "Received RS from non-link-local address %s. Ignoring", |
268 | IN6_ADDR_TO_STRING(&src)); | |
1f2db2e3 | 269 | return 0; |
88d5a3db PF |
270 | |
271 | case -EMULTIHOP: | |
35388783 | 272 | log_radv(ra, "Received RS with invalid hop limit. Ignoring."); |
1f2db2e3 | 273 | return 0; |
88d5a3db PF |
274 | |
275 | case -EPFNOSUPPORT: | |
35388783 | 276 | log_radv(ra, "Received invalid source address from ICMPv6 socket. Ignoring."); |
1f2db2e3 | 277 | return 0; |
88d5a3db PF |
278 | |
279 | default: | |
ab8a8a4e | 280 | log_radv_errno(ra, r, "Unexpected error receiving from ICMPv6 socket, ignoring: %m"); |
1f2db2e3 | 281 | return 0; |
88d5a3db PF |
282 | } |
283 | ||
cfffddea | 284 | if ((size_t) buflen < sizeof(struct nd_router_solicit)) { |
35388783 | 285 | log_radv(ra, "Too short packet received, ignoring"); |
cfffddea LP |
286 | return 0; |
287 | } | |
288 | ||
84dbb3fd | 289 | const char *addr = IN6_ADDR_TO_STRING(&src); |
88d5a3db | 290 | |
7003b114 | 291 | r = radv_send(ra, &src, ra->lifetime_usec); |
88d5a3db | 292 | if (r < 0) |
84dbb3fd | 293 | log_radv_errno(ra, r, "Unable to send solicited Router Advertisement to %s, ignoring: %m", addr); |
88d5a3db | 294 | else |
84dbb3fd | 295 | log_radv(ra, "Sent solicited Router Advertisement to %s", addr); |
88d5a3db PF |
296 | |
297 | return 0; | |
298 | } | |
299 | ||
204fb681 | 300 | static int radv_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
7003b114 | 301 | usec_t min_timeout, max_timeout, time_now, timeout; |
99534007 | 302 | sd_radv *ra = ASSERT_PTR(userdata); |
7003b114 | 303 | int r; |
204fb681 PF |
304 | |
305 | assert(s); | |
204fb681 | 306 | assert(ra->event); |
80477557 | 307 | assert(router_lifetime_is_valid(ra->lifetime_usec)); |
204fb681 | 308 | |
ba4e0427 | 309 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
204fb681 PF |
310 | if (r < 0) |
311 | goto fail; | |
312 | ||
7003b114 | 313 | r = radv_send(ra, NULL, ra->lifetime_usec); |
204fb681 | 314 | if (r < 0) |
abb977a6 | 315 | log_radv_errno(ra, r, "Unable to send Router Advertisement, ignoring: %m"); |
204fb681 PF |
316 | |
317 | /* RFC 4861, Section 6.2.4, sending initial Router Advertisements */ | |
80477557 | 318 | if (ra->ra_sent < RADV_MAX_INITIAL_RTR_ADVERTISEMENTS) |
d6fc0d67 | 319 | max_timeout = RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC; |
80477557 | 320 | else |
03ec10fd | 321 | max_timeout = RADV_DEFAULT_MAX_TIMEOUT_USEC; |
204fb681 | 322 | |
ef90b6a4 | 323 | /* RFC 4861, Section 6.2.1, lifetime must be at least MaxRtrAdvInterval, |
80477557 YW |
324 | * so lower the interval here */ |
325 | if (ra->lifetime_usec > 0) | |
326 | max_timeout = MIN(max_timeout, ra->lifetime_usec); | |
327 | ||
328 | if (max_timeout >= 9 * USEC_PER_SEC) | |
ef90b6a4 | 329 | min_timeout = max_timeout / 3; |
80477557 YW |
330 | else |
331 | min_timeout = max_timeout * 3 / 4; | |
ef90b6a4 | 332 | |
80477557 YW |
333 | /* RFC 4861, Section 6.2.1. |
334 | * MaxRtrAdvInterval MUST be no less than 4 seconds and no greater than 1800 seconds. | |
335 | * MinRtrAdvInterval MUST be no less than 3 seconds and no greater than .75 * MaxRtrAdvInterval. */ | |
336 | assert(max_timeout >= RADV_MIN_MAX_TIMEOUT_USEC); | |
337 | assert(max_timeout <= RADV_MAX_MAX_TIMEOUT_USEC); | |
338 | assert(min_timeout >= RADV_MIN_MIN_TIMEOUT_USEC); | |
339 | assert(min_timeout <= max_timeout * 3 / 4); | |
ef90b6a4 | 340 | |
80477557 | 341 | timeout = min_timeout + random_u64_range(max_timeout - min_timeout); |
5291f26d | 342 | log_radv(ra, "Next Router Advertisement in %s", FORMAT_TIMESPAN(timeout, USEC_PER_SEC)); |
204fb681 | 343 | |
807a8ede | 344 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 345 | CLOCK_BOOTTIME, |
80477557 | 346 | usec_add(time_now, timeout), MSEC_PER_SEC, |
807a8ede YW |
347 | radv_timeout, ra, |
348 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
349 | if (r < 0) |
350 | goto fail; | |
351 | ||
352 | ra->ra_sent++; | |
353 | ||
807a8ede YW |
354 | return 0; |
355 | ||
204fb681 | 356 | fail: |
290696e5 | 357 | sd_radv_stop(ra); |
204fb681 PF |
358 | |
359 | return 0; | |
360 | } | |
361 | ||
17347053 | 362 | int sd_radv_stop(sd_radv *ra) { |
204fb681 PF |
363 | int r; |
364 | ||
c8bae363 YW |
365 | if (!ra) |
366 | return 0; | |
204f99d2 | 367 | |
d6fc0d67 | 368 | if (ra->state == RADV_STATE_IDLE) |
6f8a8b84 SS |
369 | return 0; |
370 | ||
35388783 | 371 | log_radv(ra, "Stopping IPv6 Router Advertisement daemon"); |
204f99d2 | 372 | |
290696e5 YW |
373 | /* RFC 4861, Section 6.2.5, send at least one Router Advertisement |
374 | with zero lifetime */ | |
375 | r = radv_send(ra, NULL, 0); | |
376 | if (r < 0) | |
abb977a6 | 377 | log_radv_errno(ra, r, "Unable to send last Router Advertisement with router lifetime set to zero, ignoring: %m"); |
204fb681 PF |
378 | |
379 | radv_reset(ra); | |
77baf5ae | 380 | ra->fd = safe_close(ra->fd); |
d6fc0d67 | 381 | ra->state = RADV_STATE_IDLE; |
204f99d2 PF |
382 | |
383 | return 0; | |
384 | } | |
385 | ||
17347053 | 386 | int sd_radv_start(sd_radv *ra) { |
f474884c | 387 | int r; |
204fb681 | 388 | |
204f99d2 PF |
389 | assert_return(ra, -EINVAL); |
390 | assert_return(ra->event, -EINVAL); | |
391 | assert_return(ra->ifindex > 0, -EINVAL); | |
392 | ||
d6fc0d67 | 393 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
394 | return 0; |
395 | ||
807a8ede | 396 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 397 | CLOCK_BOOTTIME, |
807a8ede YW |
398 | 0, 0, |
399 | radv_timeout, ra, | |
400 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
401 | if (r < 0) |
402 | goto fail; | |
403 | ||
77baf5ae PF |
404 | r = icmp6_bind_router_advertisement(ra->ifindex); |
405 | if (r < 0) | |
406 | goto fail; | |
407 | ||
408 | ra->fd = r; | |
88d5a3db PF |
409 | |
410 | r = sd_event_add_io(ra->event, &ra->recv_event_source, ra->fd, EPOLLIN, radv_recv, ra); | |
411 | if (r < 0) | |
412 | goto fail; | |
413 | ||
414 | r = sd_event_source_set_priority(ra->recv_event_source, ra->event_priority); | |
415 | if (r < 0) | |
416 | goto fail; | |
417 | ||
418 | (void) sd_event_source_set_description(ra->recv_event_source, "radv-receive-message"); | |
77baf5ae | 419 | |
d6fc0d67 | 420 | ra->state = RADV_STATE_ADVERTISING; |
204f99d2 | 421 | |
35388783 | 422 | log_radv(ra, "Started IPv6 Router Advertisement daemon"); |
204f99d2 PF |
423 | |
424 | return 0; | |
204fb681 PF |
425 | |
426 | fail: | |
427 | radv_reset(ra); | |
428 | ||
429 | return r; | |
204f99d2 PF |
430 | } |
431 | ||
17347053 | 432 | int sd_radv_set_ifindex(sd_radv *ra, int ifindex) { |
204f99d2 | 433 | assert_return(ra, -EINVAL); |
7fa69c0a | 434 | assert_return(ifindex > 0, -EINVAL); |
204f99d2 | 435 | |
d6fc0d67 | 436 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
437 | return -EBUSY; |
438 | ||
439 | ra->ifindex = ifindex; | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
61a9fa8f YW |
444 | int sd_radv_set_ifname(sd_radv *ra, const char *ifname) { |
445 | assert_return(ra, -EINVAL); | |
446 | assert_return(ifname, -EINVAL); | |
447 | ||
448 | if (!ifname_valid_full(ifname, IFNAME_VALID_ALTERNATIVE)) | |
449 | return -EINVAL; | |
450 | ||
451 | return free_and_strdup(&ra->ifname, ifname); | |
452 | } | |
453 | ||
5977b71f YW |
454 | int sd_radv_get_ifname(sd_radv *ra, const char **ret) { |
455 | int r; | |
456 | ||
457 | assert_return(ra, -EINVAL); | |
61a9fa8f | 458 | |
5977b71f YW |
459 | r = get_ifname(ra->ifindex, &ra->ifname); |
460 | if (r < 0) | |
461 | return r; | |
462 | ||
463 | if (ret) | |
464 | *ret = ra->ifname; | |
465 | ||
466 | return 0; | |
61a9fa8f YW |
467 | } |
468 | ||
17347053 | 469 | int sd_radv_set_mac(sd_radv *ra, const struct ether_addr *mac_addr) { |
204f99d2 PF |
470 | assert_return(ra, -EINVAL); |
471 | ||
d6fc0d67 | 472 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
473 | return -EBUSY; |
474 | ||
475 | if (mac_addr) | |
476 | ra->mac_addr = *mac_addr; | |
477 | else | |
478 | zero(ra->mac_addr); | |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
17347053 | 483 | int sd_radv_set_mtu(sd_radv *ra, uint32_t mtu) { |
204f99d2 PF |
484 | assert_return(ra, -EINVAL); |
485 | assert_return(mtu >= 1280, -EINVAL); | |
486 | ||
204f99d2 PF |
487 | ra->mtu = mtu; |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
17347053 | 492 | int sd_radv_set_hop_limit(sd_radv *ra, uint8_t hop_limit) { |
204f99d2 PF |
493 | assert_return(ra, -EINVAL); |
494 | ||
d6fc0d67 | 495 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
496 | return -EBUSY; |
497 | ||
498 | ra->hop_limit = hop_limit; | |
499 | ||
500 | return 0; | |
501 | } | |
502 | ||
fdc4c67c SS |
503 | int sd_radv_set_retransmit(sd_radv *ra, uint32_t retransmit_msec) { |
504 | assert_return(ra, -EINVAL); | |
505 | ||
506 | if (ra->state != RADV_STATE_IDLE) | |
507 | return -EBUSY; | |
508 | ||
509 | ra->retransmit_msec = retransmit_msec; | |
510 | ||
511 | return 0; | |
512 | } | |
513 | ||
17347053 | 514 | int sd_radv_set_router_lifetime(sd_radv *ra, uint64_t lifetime_usec) { |
204f99d2 PF |
515 | assert_return(ra, -EINVAL); |
516 | ||
d6fc0d67 | 517 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
518 | return -EBUSY; |
519 | ||
09457670 YW |
520 | if (!router_lifetime_is_valid(lifetime_usec)) |
521 | return -EINVAL; | |
522 | ||
ac138551 YW |
523 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
524 | * to (00) by the sender..." */ | |
7003b114 | 525 | if (lifetime_usec == 0 && |
204f99d2 | 526 | (ra->flags & (0x3 << 3)) != (SD_NDISC_PREFERENCE_MEDIUM << 3)) |
09457670 | 527 | return -EINVAL; |
204f99d2 | 528 | |
7003b114 | 529 | ra->lifetime_usec = lifetime_usec; |
204f99d2 PF |
530 | |
531 | return 0; | |
532 | } | |
533 | ||
17347053 | 534 | int sd_radv_set_managed_information(sd_radv *ra, int managed) { |
204f99d2 PF |
535 | assert_return(ra, -EINVAL); |
536 | ||
d6fc0d67 | 537 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
538 | return -EBUSY; |
539 | ||
540 | SET_FLAG(ra->flags, ND_RA_FLAG_MANAGED, managed); | |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
17347053 | 545 | int sd_radv_set_other_information(sd_radv *ra, int other) { |
204f99d2 PF |
546 | assert_return(ra, -EINVAL); |
547 | ||
d6fc0d67 | 548 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
549 | return -EBUSY; |
550 | ||
551 | SET_FLAG(ra->flags, ND_RA_FLAG_OTHER, other); | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
17347053 | 556 | int sd_radv_set_preference(sd_radv *ra, unsigned preference) { |
204f99d2 PF |
557 | assert_return(ra, -EINVAL); |
558 | assert_return(IN_SET(preference, | |
559 | SD_NDISC_PREFERENCE_LOW, | |
560 | SD_NDISC_PREFERENCE_MEDIUM, | |
561 | SD_NDISC_PREFERENCE_HIGH), -EINVAL); | |
562 | ||
dd1b1870 YW |
563 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
564 | * to (00) by the sender..." */ | |
7003b114 | 565 | if (ra->lifetime_usec == 0 && preference != SD_NDISC_PREFERENCE_MEDIUM) |
dd1b1870 YW |
566 | return -EINVAL; |
567 | ||
204f99d2 PF |
568 | ra->flags = (ra->flags & ~(0x3 << 3)) | (preference << 3); |
569 | ||
dd1b1870 | 570 | return 0; |
204f99d2 PF |
571 | } |
572 | ||
17347053 | 573 | int sd_radv_add_prefix(sd_radv *ra, sd_radv_prefix *p) { |
03677889 | 574 | sd_radv_prefix *found = NULL; |
d601b566 | 575 | int r; |
204f99d2 PF |
576 | |
577 | assert_return(ra, -EINVAL); | |
acbb5500 | 578 | assert_return(p, -EINVAL); |
204f99d2 | 579 | |
59ea6e57 | 580 | /* Refuse prefixes that don't have a prefix set */ |
94876904 | 581 | if (in6_addr_is_null(&p->opt.in6_addr)) |
59ea6e57 LP |
582 | return -ENOEXEC; |
583 | ||
c71384a9 | 584 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
5380707a | 585 | |
204f99d2 | 586 | LIST_FOREACH(prefix, cur, ra->prefixes) { |
204f99d2 | 587 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 588 | (const union in_addr_union*) &cur->opt.in6_addr, |
204f99d2 | 589 | cur->opt.prefixlen, |
c633628d | 590 | (const union in_addr_union*) &p->opt.in6_addr, |
204f99d2 | 591 | p->opt.prefixlen); |
5380707a YW |
592 | if (r < 0) |
593 | return r; | |
594 | if (r == 0) | |
595 | continue; | |
204f99d2 | 596 | |
95e104e0 | 597 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 598 | found = cur; |
b9f27a05 | 599 | break; |
95e104e0 | 600 | } |
d601b566 | 601 | |
35388783 | 602 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 603 | "IPv6 prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
604 | addr_p, |
605 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
204f99d2 PF |
606 | } |
607 | ||
56aa5143 | 608 | if (found) { |
b9f27a05 YW |
609 | /* p and cur may be equivalent. First increment the reference counter. */ |
610 | sd_radv_prefix_ref(p); | |
611 | ||
612 | /* Then, remove the old entry. */ | |
56aa5143 YW |
613 | LIST_REMOVE(prefix, ra->prefixes, found); |
614 | sd_radv_prefix_unref(found); | |
b9f27a05 YW |
615 | |
616 | /* Finally, add the new entry. */ | |
617 | LIST_APPEND(prefix, ra->prefixes, p); | |
618 | ||
619 | log_radv(ra, "Updated/replaced IPv6 prefix %s (preferred: %s, valid: %s)", | |
c71384a9 | 620 | addr_p, |
b9f27a05 YW |
621 | FORMAT_TIMESPAN(p->lifetime_preferred_usec, USEC_PER_SEC), |
622 | FORMAT_TIMESPAN(p->lifetime_valid_usec, USEC_PER_SEC)); | |
623 | } else { | |
624 | /* The prefix is new. Let's simply add it. */ | |
625 | ||
626 | sd_radv_prefix_ref(p); | |
627 | LIST_APPEND(prefix, ra->prefixes, p); | |
628 | ra->n_prefixes++; | |
204f99d2 | 629 | |
c71384a9 | 630 | log_radv(ra, "Added prefix %s", addr_p); |
b9f27a05 | 631 | } |
059d7b6e YW |
632 | |
633 | if (ra->state == RADV_STATE_IDLE) | |
634 | return 0; | |
635 | ||
059d7b6e | 636 | if (ra->ra_sent == 0) |
d601b566 | 637 | return 0; |
d601b566 | 638 | |
97efde65 | 639 | /* If RAs have already been sent, send an RA immediately to announce the newly-added prefix */ |
059d7b6e YW |
640 | r = radv_send(ra, NULL, ra->lifetime_usec); |
641 | if (r < 0) | |
abb977a6 | 642 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added prefix %s, ignoring: %m", addr_p); |
059d7b6e | 643 | else |
c71384a9 | 644 | log_radv(ra, "Sent Router Advertisement for added/updated prefix %s.", addr_p); |
97efde65 | 645 | |
204f99d2 PF |
646 | return 0; |
647 | } | |
648 | ||
95931532 YW |
649 | void sd_radv_remove_prefix( |
650 | sd_radv *ra, | |
651 | const struct in6_addr *prefix, | |
652 | unsigned char prefixlen) { | |
34c169c4 | 653 | |
95931532 YW |
654 | if (!ra) |
655 | return; | |
34c169c4 | 656 | |
95931532 YW |
657 | if (!prefix) |
658 | return; | |
659 | ||
660 | LIST_FOREACH(prefix, cur, ra->prefixes) { | |
34c169c4 PF |
661 | if (prefixlen != cur->opt.prefixlen) |
662 | continue; | |
663 | ||
94876904 | 664 | if (!in6_addr_equal(prefix, &cur->opt.in6_addr)) |
34c169c4 PF |
665 | continue; |
666 | ||
667 | LIST_REMOVE(prefix, ra->prefixes, cur); | |
668 | ra->n_prefixes--; | |
62bbbedf | 669 | sd_radv_prefix_unref(cur); |
95931532 | 670 | return; |
34c169c4 | 671 | } |
34c169c4 PF |
672 | } |
673 | ||
17347053 | 674 | int sd_radv_add_route_prefix(sd_radv *ra, sd_radv_route_prefix *p) { |
03677889 | 675 | sd_radv_route_prefix *found = NULL; |
203d4df5 SS |
676 | int r; |
677 | ||
678 | assert_return(ra, -EINVAL); | |
acbb5500 | 679 | assert_return(p, -EINVAL); |
203d4df5 | 680 | |
c71384a9 | 681 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
203d4df5 SS |
682 | |
683 | LIST_FOREACH(prefix, cur, ra->route_prefixes) { | |
203d4df5 | 684 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 685 | (const union in_addr_union*) &cur->opt.in6_addr, |
203d4df5 | 686 | cur->opt.prefixlen, |
c633628d | 687 | (const union in_addr_union*) &p->opt.in6_addr, |
203d4df5 SS |
688 | p->opt.prefixlen); |
689 | if (r < 0) | |
690 | return r; | |
691 | if (r == 0) | |
692 | continue; | |
693 | ||
95e104e0 | 694 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 695 | found = cur; |
b9f27a05 | 696 | break; |
95e104e0 | 697 | } |
203d4df5 | 698 | |
35388783 | 699 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 700 | "IPv6 route prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
701 | addr_p, |
702 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
203d4df5 SS |
703 | } |
704 | ||
56aa5143 | 705 | if (found) { |
b9f27a05 YW |
706 | /* p and cur may be equivalent. First increment the reference counter. */ |
707 | sd_radv_route_prefix_ref(p); | |
708 | ||
709 | /* Then, remove the old entry. */ | |
56aa5143 YW |
710 | LIST_REMOVE(prefix, ra->route_prefixes, found); |
711 | sd_radv_route_prefix_unref(found); | |
b9f27a05 YW |
712 | |
713 | /* Finally, add the new entry. */ | |
714 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
715 | ||
716 | log_radv(ra, "Updated/replaced IPv6 route prefix %s (lifetime: %s)", | |
717 | strna(addr_p), | |
718 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
719 | } else { | |
720 | /* The route prefix is new. Let's simply add it. */ | |
721 | ||
722 | sd_radv_route_prefix_ref(p); | |
723 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
724 | ra->n_route_prefixes++; | |
725 | ||
726 | log_radv(ra, "Added route prefix %s", strna(addr_p)); | |
727 | } | |
059d7b6e YW |
728 | |
729 | if (ra->state == RADV_STATE_IDLE) | |
730 | return 0; | |
731 | ||
059d7b6e | 732 | if (ra->ra_sent == 0) |
203d4df5 | 733 | return 0; |
203d4df5 | 734 | |
97efde65 | 735 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ |
059d7b6e YW |
736 | r = radv_send(ra, NULL, ra->lifetime_usec); |
737 | if (r < 0) | |
abb977a6 | 738 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added route prefix %s, ignoring: %m", |
b9f27a05 | 739 | strna(addr_p)); |
059d7b6e | 740 | else |
b9f27a05 | 741 | log_radv(ra, "Sent Router Advertisement for added route prefix %s.", strna(addr_p)); |
97efde65 | 742 | |
203d4df5 SS |
743 | return 0; |
744 | } | |
745 | ||
1925f829 SS |
746 | int sd_radv_add_pref64_prefix(sd_radv *ra, sd_radv_pref64_prefix *p) { |
747 | sd_radv_pref64_prefix *found = NULL; | |
748 | int r; | |
749 | ||
750 | assert_return(ra, -EINVAL); | |
751 | assert_return(p, -EINVAL); | |
752 | ||
753 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->in6_addr, p->prefixlen); | |
754 | ||
755 | LIST_FOREACH(prefix, cur, ra->pref64_prefixes) { | |
756 | r = in_addr_prefix_intersect(AF_INET6, | |
757 | (const union in_addr_union*) &cur->in6_addr, | |
758 | cur->prefixlen, | |
759 | (const union in_addr_union*) &p->in6_addr, | |
760 | p->prefixlen); | |
761 | if (r < 0) | |
762 | return r; | |
763 | if (r == 0) | |
764 | continue; | |
765 | ||
766 | if (cur->prefixlen == p->prefixlen) { | |
767 | found = cur; | |
768 | break; | |
769 | } | |
770 | ||
771 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), | |
772 | "IPv6 PREF64 prefix %s conflicts with %s, ignoring.", | |
773 | addr_p, | |
774 | IN6_ADDR_PREFIX_TO_STRING(&cur->in6_addr, cur->prefixlen)); | |
775 | } | |
776 | ||
777 | if (found) { | |
778 | /* p and cur may be equivalent. First increment the reference counter. */ | |
779 | sd_radv_pref64_prefix_ref(p); | |
780 | ||
781 | /* Then, remove the old entry. */ | |
782 | LIST_REMOVE(prefix, ra->pref64_prefixes, found); | |
783 | sd_radv_pref64_prefix_unref(found); | |
784 | ||
785 | /* Finally, add the new entry. */ | |
786 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
787 | ||
788 | log_radv(ra, "Updated/replaced IPv6 PREF64 prefix %s (lifetime: %s)", | |
789 | strna(addr_p), | |
790 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
791 | } else { | |
792 | /* The route prefix is new. Let's simply add it. */ | |
793 | ||
794 | sd_radv_pref64_prefix_ref(p); | |
795 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
796 | ra->n_pref64_prefixes++; | |
797 | ||
798 | log_radv(ra, "Added PREF64 prefix %s", strna(addr_p)); | |
799 | } | |
800 | ||
801 | if (ra->state == RADV_STATE_IDLE) | |
802 | return 0; | |
803 | ||
804 | if (ra->ra_sent == 0) | |
805 | return 0; | |
806 | ||
807 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ | |
808 | r = radv_send(ra, NULL, ra->lifetime_usec); | |
809 | if (r < 0) | |
810 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added PREF64 prefix %s, ignoring: %m", | |
811 | strna(addr_p)); | |
812 | else | |
813 | log_radv(ra, "Sent Router Advertisement for added PREF64 prefix %s.", strna(addr_p)); | |
814 | ||
815 | return 0; | |
816 | } | |
817 | ||
faaf3d66 YW |
818 | int sd_radv_set_rdnss( |
819 | sd_radv *ra, | |
820 | uint32_t lifetime, | |
821 | const struct in6_addr *dns, | |
822 | size_t n_dns) { | |
823 | ||
e9c6da38 PF |
824 | _cleanup_free_ struct sd_radv_opt_dns *opt_rdnss = NULL; |
825 | size_t len; | |
826 | ||
827 | assert_return(ra, -EINVAL); | |
828 | assert_return(n_dns < 128, -EINVAL); | |
829 | ||
830 | if (!dns || n_dns == 0) { | |
831 | ra->rdnss = mfree(ra->rdnss); | |
832 | ra->n_rdnss = 0; | |
833 | ||
834 | return 0; | |
835 | } | |
836 | ||
837 | len = sizeof(struct sd_radv_opt_dns) + sizeof(struct in6_addr) * n_dns; | |
838 | ||
839 | opt_rdnss = malloc0(len); | |
840 | if (!opt_rdnss) | |
841 | return -ENOMEM; | |
842 | ||
d6fc0d67 | 843 | opt_rdnss->type = RADV_OPT_RDNSS; |
e9c6da38 PF |
844 | opt_rdnss->length = len / 8; |
845 | opt_rdnss->lifetime = htobe32(lifetime); | |
846 | ||
847 | memcpy(opt_rdnss + 1, dns, n_dns * sizeof(struct in6_addr)); | |
848 | ||
1cc6c93a | 849 | free_and_replace(ra->rdnss, opt_rdnss); |
e9c6da38 PF |
850 | |
851 | ra->n_rdnss = n_dns; | |
852 | ||
853 | return 0; | |
854 | } | |
855 | ||
faaf3d66 YW |
856 | int sd_radv_set_dnssl( |
857 | sd_radv *ra, | |
858 | uint32_t lifetime, | |
859 | char **search_list) { | |
860 | ||
e965d6ab PF |
861 | _cleanup_free_ struct sd_radv_opt_dns *opt_dnssl = NULL; |
862 | size_t len = 0; | |
e965d6ab PF |
863 | uint8_t *p; |
864 | ||
865 | assert_return(ra, -EINVAL); | |
866 | ||
97d7974b | 867 | if (strv_isempty(search_list)) { |
e965d6ab | 868 | ra->dnssl = mfree(ra->dnssl); |
e965d6ab PF |
869 | return 0; |
870 | } | |
871 | ||
872 | STRV_FOREACH(s, search_list) | |
873 | len += strlen(*s) + 2; | |
874 | ||
875 | len = (sizeof(struct sd_radv_opt_dns) + len + 7) & ~0x7; | |
876 | ||
877 | opt_dnssl = malloc0(len); | |
878 | if (!opt_dnssl) | |
879 | return -ENOMEM; | |
880 | ||
d6fc0d67 | 881 | opt_dnssl->type = RADV_OPT_DNSSL; |
e965d6ab PF |
882 | opt_dnssl->length = len / 8; |
883 | opt_dnssl->lifetime = htobe32(lifetime); | |
884 | ||
885 | p = (uint8_t *)(opt_dnssl + 1); | |
886 | len -= sizeof(struct sd_radv_opt_dns); | |
887 | ||
888 | STRV_FOREACH(s, search_list) { | |
889 | int r; | |
890 | ||
891 | r = dns_name_to_wire_format(*s, p, len, false); | |
892 | if (r < 0) | |
893 | return r; | |
894 | ||
895 | if (len < (size_t)r) | |
896 | return -ENOBUFS; | |
897 | ||
898 | p += r; | |
899 | len -= r; | |
900 | } | |
901 | ||
1cc6c93a | 902 | free_and_replace(ra->dnssl, opt_dnssl); |
e965d6ab PF |
903 | |
904 | return 0; | |
905 | } | |
906 | ||
17347053 | 907 | int sd_radv_prefix_new(sd_radv_prefix **ret) { |
d2c8eed2 | 908 | sd_radv_prefix *p; |
04473969 PF |
909 | |
910 | assert_return(ret, -EINVAL); | |
911 | ||
d2c8eed2 | 912 | p = new(sd_radv_prefix, 1); |
04473969 PF |
913 | if (!p) |
914 | return -ENOMEM; | |
915 | ||
d2c8eed2 LP |
916 | *p = (sd_radv_prefix) { |
917 | .n_ref = 1, | |
04473969 | 918 | |
d2c8eed2 LP |
919 | .opt.type = ND_OPT_PREFIX_INFORMATION, |
920 | .opt.length = (sizeof(p->opt) - 1)/8 + 1, | |
921 | .opt.prefixlen = 64, | |
04473969 | 922 | |
d2c8eed2 LP |
923 | /* RFC 4861, Section 6.2.1 */ |
924 | .opt.flags = ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO, | |
204f99d2 | 925 | |
d951507d YW |
926 | .lifetime_valid_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
927 | .lifetime_preferred_usec = RADV_DEFAULT_PREFERRED_LIFETIME_USEC, | |
95e104e0 YW |
928 | .valid_until = USEC_INFINITY, |
929 | .preferred_until = USEC_INFINITY, | |
d2c8eed2 | 930 | }; |
04473969 | 931 | |
d2c8eed2 | 932 | *ret = p; |
04473969 PF |
933 | return 0; |
934 | } | |
935 | ||
8301aa0b | 936 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_prefix, sd_radv_prefix, mfree); |
04473969 | 937 | |
faaf3d66 YW |
938 | int sd_radv_prefix_set_prefix( |
939 | sd_radv_prefix *p, | |
940 | const struct in6_addr *in6_addr, | |
941 | unsigned char prefixlen) { | |
942 | ||
04473969 PF |
943 | assert_return(p, -EINVAL); |
944 | assert_return(in6_addr, -EINVAL); | |
945 | ||
946 | if (prefixlen < 3 || prefixlen > 128) | |
947 | return -EINVAL; | |
948 | ||
949 | if (prefixlen > 64) | |
950 | /* unusual but allowed, log it */ | |
35388783 | 951 | log_radv(NULL, "Unusual prefix length %d greater than 64", prefixlen); |
04473969 PF |
952 | |
953 | p->opt.in6_addr = *in6_addr; | |
954 | p->opt.prefixlen = prefixlen; | |
955 | ||
956 | return 0; | |
957 | } | |
958 | ||
faaf3d66 YW |
959 | int sd_radv_prefix_get_prefix( |
960 | sd_radv_prefix *p, | |
961 | struct in6_addr *ret_in6_addr, | |
962 | unsigned char *ret_prefixlen) { | |
963 | ||
34332af2 SS |
964 | assert_return(p, -EINVAL); |
965 | assert_return(ret_in6_addr, -EINVAL); | |
966 | assert_return(ret_prefixlen, -EINVAL); | |
967 | ||
968 | *ret_in6_addr = p->opt.in6_addr; | |
969 | *ret_prefixlen = p->opt.prefixlen; | |
970 | ||
971 | return 0; | |
972 | } | |
973 | ||
17347053 | 974 | int sd_radv_prefix_set_onlink(sd_radv_prefix *p, int onlink) { |
04473969 PF |
975 | assert_return(p, -EINVAL); |
976 | ||
977 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, onlink); | |
978 | ||
979 | return 0; | |
980 | } | |
981 | ||
faaf3d66 | 982 | int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix *p, int address_autoconfiguration) { |
04473969 PF |
983 | assert_return(p, -EINVAL); |
984 | ||
985 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, address_autoconfiguration); | |
986 | ||
987 | return 0; | |
988 | } | |
989 | ||
17347053 | 990 | int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
991 | assert_return(p, -EINVAL); |
992 | ||
95e104e0 YW |
993 | p->lifetime_valid_usec = lifetime_usec; |
994 | p->valid_until = valid_until; | |
04473969 PF |
995 | |
996 | return 0; | |
997 | } | |
998 | ||
17347053 | 999 | int sd_radv_prefix_set_preferred_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
1000 | assert_return(p, -EINVAL); |
1001 | ||
95e104e0 YW |
1002 | p->lifetime_preferred_usec = lifetime_usec; |
1003 | p->preferred_until = valid_until; | |
04473969 PF |
1004 | |
1005 | return 0; | |
1006 | } | |
203d4df5 | 1007 | |
17347053 | 1008 | int sd_radv_route_prefix_new(sd_radv_route_prefix **ret) { |
203d4df5 SS |
1009 | sd_radv_route_prefix *p; |
1010 | ||
1011 | assert_return(ret, -EINVAL); | |
1012 | ||
1013 | p = new(sd_radv_route_prefix, 1); | |
1014 | if (!p) | |
1015 | return -ENOMEM; | |
1016 | ||
1017 | *p = (sd_radv_route_prefix) { | |
1018 | .n_ref = 1, | |
1019 | ||
d6fc0d67 | 1020 | .opt.type = RADV_OPT_ROUTE_INFORMATION, |
203d4df5 SS |
1021 | .opt.length = DIV_ROUND_UP(sizeof(p->opt), 8), |
1022 | .opt.prefixlen = 64, | |
1023 | ||
d951507d | 1024 | .lifetime_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
95e104e0 | 1025 | .valid_until = USEC_INFINITY, |
203d4df5 SS |
1026 | }; |
1027 | ||
1028 | *ret = p; | |
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_route_prefix, sd_radv_route_prefix, mfree); | |
1033 | ||
faaf3d66 YW |
1034 | int sd_radv_route_prefix_set_prefix( |
1035 | sd_radv_route_prefix *p, | |
1036 | const struct in6_addr *in6_addr, | |
1037 | unsigned char prefixlen) { | |
1038 | ||
203d4df5 SS |
1039 | assert_return(p, -EINVAL); |
1040 | assert_return(in6_addr, -EINVAL); | |
1041 | ||
1042 | if (prefixlen > 128) | |
1043 | return -EINVAL; | |
1044 | ||
1045 | if (prefixlen > 64) | |
1046 | /* unusual but allowed, log it */ | |
35388783 | 1047 | log_radv(NULL, "Unusual prefix length %u greater than 64", prefixlen); |
203d4df5 SS |
1048 | |
1049 | p->opt.in6_addr = *in6_addr; | |
1050 | p->opt.prefixlen = prefixlen; | |
1051 | ||
1052 | return 0; | |
1053 | } | |
1054 | ||
17347053 | 1055 | int sd_radv_route_prefix_set_lifetime(sd_radv_route_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
203d4df5 SS |
1056 | assert_return(p, -EINVAL); |
1057 | ||
95e104e0 YW |
1058 | p->lifetime_usec = lifetime_usec; |
1059 | p->valid_until = valid_until; | |
203d4df5 SS |
1060 | |
1061 | return 0; | |
1062 | } | |
1925f829 SS |
1063 | |
1064 | int sd_radv_pref64_prefix_new(sd_radv_pref64_prefix **ret) { | |
1065 | sd_radv_pref64_prefix *p; | |
1066 | ||
1067 | assert_return(ret, -EINVAL); | |
1068 | ||
1069 | p = new(sd_radv_pref64_prefix, 1); | |
1070 | if (!p) | |
1071 | return -ENOMEM; | |
1072 | ||
1073 | *p = (sd_radv_pref64_prefix) { | |
1074 | .n_ref = 1, | |
1075 | ||
1076 | .opt.type = RADV_OPT_PREF64, | |
1077 | .opt.length = 2, | |
1078 | }; | |
1079 | ||
1080 | *ret = p; | |
1081 | return 0; | |
1082 | } | |
1083 | ||
1084 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_pref64_prefix, sd_radv_pref64_prefix, mfree); | |
1085 | ||
1086 | int sd_radv_pref64_prefix_set_prefix( | |
1087 | sd_radv_pref64_prefix *p, | |
1088 | const struct in6_addr *prefix, | |
1089 | uint8_t prefixlen, | |
1090 | uint64_t lifetime_usec) { | |
1091 | ||
1092 | uint16_t pref64_lifetime; | |
1093 | uint8_t prefixlen_code; | |
1094 | ||
1095 | assert_return(p, -EINVAL); | |
1096 | assert_return(prefix, -EINVAL); | |
1097 | ||
1098 | switch (prefixlen) { | |
1099 | case 96: | |
1100 | prefixlen_code = 0; | |
1101 | break; | |
1102 | case 64: | |
1103 | prefixlen_code = 1; | |
1104 | break; | |
1105 | case 56: | |
1106 | prefixlen_code = 2; | |
1107 | break; | |
1108 | case 48: | |
1109 | prefixlen_code = 3; | |
1110 | break; | |
1111 | case 40: | |
1112 | prefixlen_code = 4; | |
1113 | break; | |
1114 | case 32: | |
1115 | prefixlen_code = 5; | |
1116 | break; | |
1117 | default: | |
1118 | log_radv(NULL, "Unsupported PREF64 prefix length %u. Valid lengths are 32, 40, 48, 56, 64 and 96", prefixlen); | |
1119 | return -EINVAL; | |
1120 | } | |
1121 | ||
1122 | if (lifetime_usec == USEC_INFINITY || DIV_ROUND_UP(lifetime_usec, 8 * USEC_PER_SEC) >= UINT64_C(1) << 13) | |
1123 | return -EINVAL; | |
1124 | ||
1125 | /* RFC 8781 - 4.1 rounding up lifetime to multiply of 8 */ | |
1126 | pref64_lifetime = DIV_ROUND_UP(lifetime_usec, 8 * USEC_PER_SEC) << 3; | |
1127 | pref64_lifetime |= prefixlen_code; | |
1128 | ||
1129 | unaligned_write_be16(&p->opt.lifetime_and_plc, pref64_lifetime); | |
1130 | memcpy(&p->opt.prefix, prefix, sizeof(p->opt.prefix)); | |
1131 | ||
1132 | p->in6_addr = *prefix; | |
1133 | p->prefixlen = prefixlen; | |
1134 | ||
1135 | return 0; | |
1136 | } |