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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" | |
bd1ae178 | 19 | #include "iovec-util.h" |
5cfa2c3d | 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 | ||
7003b114 | 129 | static int radv_send(sd_radv *ra, const struct in6_addr *dst, usec_t lifetime_usec) { |
77baf5ae PF |
130 | struct sockaddr_in6 dst_addr = { |
131 | .sin6_family = AF_INET6, | |
132 | .sin6_addr = IN6ADDR_ALL_NODES_MULTICAST_INIT, | |
133 | }; | |
134 | struct nd_router_advert adv = {}; | |
135 | struct { | |
136 | struct nd_opt_hdr opthdr; | |
137 | struct ether_addr slladdr; | |
138 | } _packed_ opt_mac = { | |
139 | .opthdr = { | |
140 | .nd_opt_type = ND_OPT_SOURCE_LINKADDR, | |
141 | .nd_opt_len = (sizeof(struct nd_opt_hdr) + | |
142 | sizeof(struct ether_addr) - 1) /8 + 1, | |
143 | }, | |
144 | }; | |
145 | struct nd_opt_mtu opt_mtu = { | |
146 | .nd_opt_mtu_type = ND_OPT_MTU, | |
147 | .nd_opt_mtu_len = 1, | |
148 | }; | |
203d4df5 | 149 | /* Reserve iov space for RA header, linkaddr, MTU, N prefixes, N routes, RDNSS |
6852c0f6 | 150 | and DNSSL */ |
203d4df5 | 151 | struct iovec iov[5 + ra->n_prefixes + ra->n_route_prefixes]; |
77baf5ae PF |
152 | struct msghdr msg = { |
153 | .msg_name = &dst_addr, | |
154 | .msg_namelen = sizeof(dst_addr), | |
155 | .msg_iov = iov, | |
156 | }; | |
d601b566 PF |
157 | usec_t time_now; |
158 | int r; | |
159 | ||
dc0ec5e2 | 160 | assert(ra); |
09457670 | 161 | assert(router_lifetime_is_valid(lifetime_usec)); |
dc0ec5e2 | 162 | |
ba4e0427 | 163 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
d601b566 PF |
164 | if (r < 0) |
165 | return r; | |
77baf5ae | 166 | |
94876904 | 167 | if (dst && in6_addr_is_set(dst)) |
77baf5ae | 168 | dst_addr.sin6_addr = *dst; |
88d5a3db | 169 | |
77baf5ae PF |
170 | adv.nd_ra_type = ND_ROUTER_ADVERT; |
171 | adv.nd_ra_curhoplimit = ra->hop_limit; | |
eca280c8 | 172 | adv.nd_ra_retransmit = usec_to_be32_msec(ra->retransmit_usec); |
77baf5ae | 173 | adv.nd_ra_flags_reserved = ra->flags; |
09457670 | 174 | assert_cc(RADV_MAX_ROUTER_LIFETIME_USEC <= UINT16_MAX * USEC_PER_SEC); |
eca280c8 | 175 | adv.nd_ra_router_lifetime = usec_to_be16_sec(lifetime_usec); |
5cfa2c3d | 176 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&adv, sizeof(adv)); |
77baf5ae PF |
177 | |
178 | /* MAC address is optional, either because the link does not use L2 | |
179 | addresses or load sharing is desired. See RFC 4861, Section 4.2 */ | |
ae25915d | 180 | if (!ether_addr_is_null(&ra->mac_addr)) { |
77baf5ae | 181 | opt_mac.slladdr = ra->mac_addr; |
5cfa2c3d | 182 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mac, sizeof(opt_mac)); |
77baf5ae PF |
183 | } |
184 | ||
41521417 | 185 | if (ra->mtu > 0) { |
77baf5ae | 186 | opt_mtu.nd_opt_mtu_mtu = htobe32(ra->mtu); |
5cfa2c3d | 187 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mtu, sizeof(opt_mtu)); |
77baf5ae PF |
188 | } |
189 | ||
190 | LIST_FOREACH(prefix, p, ra->prefixes) { | |
95e104e0 | 191 | usec_t lifetime_valid_usec, lifetime_preferred_usec; |
d601b566 | 192 | |
95e104e0 YW |
193 | lifetime_valid_usec = MIN(usec_sub_unsigned(p->valid_until, time_now), |
194 | p->lifetime_valid_usec); | |
195 | ||
196 | lifetime_preferred_usec = MIN3(usec_sub_unsigned(p->preferred_until, time_now), | |
197 | p->lifetime_preferred_usec, | |
198 | lifetime_valid_usec); | |
199 | ||
200 | p->opt.lifetime_valid = usec_to_be32_sec(lifetime_valid_usec); | |
201 | p->opt.lifetime_preferred = usec_to_be32_sec(lifetime_preferred_usec); | |
d601b566 | 202 | |
5cfa2c3d | 203 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&p->opt, sizeof(p->opt)); |
77baf5ae PF |
204 | } |
205 | ||
95e104e0 YW |
206 | LIST_FOREACH(prefix, rt, ra->route_prefixes) { |
207 | rt->opt.lifetime = usec_to_be32_sec(MIN(usec_sub_unsigned(rt->valid_until, time_now), | |
208 | rt->lifetime_usec)); | |
209 | ||
203d4df5 | 210 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&rt->opt, sizeof(rt->opt)); |
95e104e0 | 211 | } |
203d4df5 | 212 | |
1925f829 SS |
213 | LIST_FOREACH(prefix, p, ra->pref64_prefixes) |
214 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&p->opt, sizeof(p->opt)); | |
215 | ||
5cfa2c3d LP |
216 | if (ra->rdnss) |
217 | iov[msg.msg_iovlen++] = IOVEC_MAKE(ra->rdnss, ra->rdnss->length * 8); | |
e9c6da38 | 218 | |
5cfa2c3d LP |
219 | if (ra->dnssl) |
220 | iov[msg.msg_iovlen++] = IOVEC_MAKE(ra->dnssl, ra->dnssl->length * 8); | |
e965d6ab | 221 | |
6a6d27bc SS |
222 | if (FLAGS_SET(ra->flags, ND_RA_FLAG_HOME_AGENT)) { |
223 | ra->home_agent.nd_opt_home_agent_info_type = ND_OPT_HOME_AGENT_INFO; | |
224 | ra->home_agent.nd_opt_home_agent_info_len = 1; | |
225 | ||
226 | /* 0 means to place the current Router Lifetime value */ | |
227 | if (ra->home_agent.nd_opt_home_agent_info_lifetime == 0) | |
228 | ra->home_agent.nd_opt_home_agent_info_lifetime = adv.nd_ra_router_lifetime; | |
229 | ||
230 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&ra->home_agent, sizeof(ra->home_agent)); | |
231 | } | |
232 | ||
77baf5ae PF |
233 | if (sendmsg(ra->fd, &msg, 0) < 0) |
234 | return -errno; | |
204fb681 | 235 | |
77baf5ae | 236 | return 0; |
204fb681 PF |
237 | } |
238 | ||
88d5a3db | 239 | static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
99534007 | 240 | sd_radv *ra = ASSERT_PTR(userdata); |
88d5a3db PF |
241 | struct in6_addr src; |
242 | triple_timestamp timestamp; | |
243 | int r; | |
88d5a3db PF |
244 | |
245 | assert(s); | |
88d5a3db PF |
246 | assert(ra->event); |
247 | ||
dd6d433a | 248 | ssize_t buflen = next_datagram_size_fd(fd); |
1f2db2e3 ZJS |
249 | if (ERRNO_IS_NEG_TRANSIENT(buflen) || ERRNO_IS_NEG_DISCONNECT(buflen)) |
250 | return 0; | |
ab8a8a4e | 251 | if (buflen < 0) { |
ab8a8a4e YW |
252 | log_radv_errno(ra, buflen, "Failed to determine datagram size to read, ignoring: %m"); |
253 | return 0; | |
254 | } | |
88d5a3db | 255 | |
dd6d433a | 256 | _cleanup_free_ char *buf = new0(char, buflen); |
88d5a3db | 257 | if (!buf) |
e55a6eae | 258 | return -ENOMEM; |
88d5a3db PF |
259 | |
260 | r = icmp6_receive(fd, buf, buflen, &src, ×tamp); | |
1f2db2e3 ZJS |
261 | if (ERRNO_IS_NEG_TRANSIENT(r) || ERRNO_IS_NEG_DISCONNECT(r)) |
262 | return 0; | |
263 | if (r < 0) | |
88d5a3db PF |
264 | switch (r) { |
265 | case -EADDRNOTAVAIL: | |
4961f566 | 266 | log_radv(ra, "Received RS from neither link-local nor null address. Ignoring"); |
1f2db2e3 | 267 | return 0; |
88d5a3db PF |
268 | |
269 | case -EMULTIHOP: | |
35388783 | 270 | log_radv(ra, "Received RS with invalid hop limit. Ignoring."); |
1f2db2e3 | 271 | return 0; |
88d5a3db PF |
272 | |
273 | case -EPFNOSUPPORT: | |
35388783 | 274 | log_radv(ra, "Received invalid source address from ICMPv6 socket. Ignoring."); |
1f2db2e3 | 275 | return 0; |
88d5a3db PF |
276 | |
277 | default: | |
ab8a8a4e | 278 | log_radv_errno(ra, r, "Unexpected error receiving from ICMPv6 socket, ignoring: %m"); |
1f2db2e3 | 279 | return 0; |
88d5a3db PF |
280 | } |
281 | ||
cfffddea | 282 | if ((size_t) buflen < sizeof(struct nd_router_solicit)) { |
35388783 | 283 | log_radv(ra, "Too short packet received, ignoring"); |
cfffddea LP |
284 | return 0; |
285 | } | |
286 | ||
4961f566 YW |
287 | /* TODO: if the sender address is null, check that the message does not have the source link-layer |
288 | * address option. See RFC 4861 Section 6.1.1. */ | |
289 | ||
84dbb3fd | 290 | const char *addr = IN6_ADDR_TO_STRING(&src); |
88d5a3db | 291 | |
7003b114 | 292 | r = radv_send(ra, &src, ra->lifetime_usec); |
88d5a3db | 293 | if (r < 0) |
84dbb3fd | 294 | log_radv_errno(ra, r, "Unable to send solicited Router Advertisement to %s, ignoring: %m", addr); |
88d5a3db | 295 | else |
84dbb3fd | 296 | log_radv(ra, "Sent solicited Router Advertisement to %s", addr); |
88d5a3db PF |
297 | |
298 | return 0; | |
299 | } | |
300 | ||
204fb681 | 301 | static int radv_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
7003b114 | 302 | usec_t min_timeout, max_timeout, time_now, timeout; |
99534007 | 303 | sd_radv *ra = ASSERT_PTR(userdata); |
7003b114 | 304 | int r; |
204fb681 PF |
305 | |
306 | assert(s); | |
204fb681 | 307 | assert(ra->event); |
80477557 | 308 | assert(router_lifetime_is_valid(ra->lifetime_usec)); |
204fb681 | 309 | |
ba4e0427 | 310 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
204fb681 PF |
311 | if (r < 0) |
312 | goto fail; | |
313 | ||
7003b114 | 314 | r = radv_send(ra, NULL, ra->lifetime_usec); |
204fb681 | 315 | if (r < 0) |
abb977a6 | 316 | log_radv_errno(ra, r, "Unable to send Router Advertisement, ignoring: %m"); |
204fb681 PF |
317 | |
318 | /* RFC 4861, Section 6.2.4, sending initial Router Advertisements */ | |
80477557 | 319 | if (ra->ra_sent < RADV_MAX_INITIAL_RTR_ADVERTISEMENTS) |
d6fc0d67 | 320 | max_timeout = RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC; |
80477557 | 321 | else |
03ec10fd | 322 | max_timeout = RADV_DEFAULT_MAX_TIMEOUT_USEC; |
204fb681 | 323 | |
ef90b6a4 | 324 | /* RFC 4861, Section 6.2.1, lifetime must be at least MaxRtrAdvInterval, |
80477557 YW |
325 | * so lower the interval here */ |
326 | if (ra->lifetime_usec > 0) | |
327 | max_timeout = MIN(max_timeout, ra->lifetime_usec); | |
328 | ||
329 | if (max_timeout >= 9 * USEC_PER_SEC) | |
ef90b6a4 | 330 | min_timeout = max_timeout / 3; |
80477557 YW |
331 | else |
332 | min_timeout = max_timeout * 3 / 4; | |
ef90b6a4 | 333 | |
80477557 YW |
334 | /* RFC 4861, Section 6.2.1. |
335 | * MaxRtrAdvInterval MUST be no less than 4 seconds and no greater than 1800 seconds. | |
336 | * MinRtrAdvInterval MUST be no less than 3 seconds and no greater than .75 * MaxRtrAdvInterval. */ | |
337 | assert(max_timeout >= RADV_MIN_MAX_TIMEOUT_USEC); | |
338 | assert(max_timeout <= RADV_MAX_MAX_TIMEOUT_USEC); | |
339 | assert(min_timeout >= RADV_MIN_MIN_TIMEOUT_USEC); | |
340 | assert(min_timeout <= max_timeout * 3 / 4); | |
ef90b6a4 | 341 | |
80477557 | 342 | timeout = min_timeout + random_u64_range(max_timeout - min_timeout); |
5291f26d | 343 | log_radv(ra, "Next Router Advertisement in %s", FORMAT_TIMESPAN(timeout, USEC_PER_SEC)); |
204fb681 | 344 | |
807a8ede | 345 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 346 | CLOCK_BOOTTIME, |
80477557 | 347 | usec_add(time_now, timeout), MSEC_PER_SEC, |
807a8ede YW |
348 | radv_timeout, ra, |
349 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
350 | if (r < 0) |
351 | goto fail; | |
352 | ||
353 | ra->ra_sent++; | |
354 | ||
807a8ede YW |
355 | return 0; |
356 | ||
204fb681 | 357 | fail: |
290696e5 | 358 | sd_radv_stop(ra); |
204fb681 PF |
359 | |
360 | return 0; | |
361 | } | |
362 | ||
17347053 | 363 | int sd_radv_stop(sd_radv *ra) { |
204fb681 PF |
364 | int r; |
365 | ||
c8bae363 YW |
366 | if (!ra) |
367 | return 0; | |
204f99d2 | 368 | |
d6fc0d67 | 369 | if (ra->state == RADV_STATE_IDLE) |
6f8a8b84 SS |
370 | return 0; |
371 | ||
35388783 | 372 | log_radv(ra, "Stopping IPv6 Router Advertisement daemon"); |
204f99d2 | 373 | |
290696e5 YW |
374 | /* RFC 4861, Section 6.2.5, send at least one Router Advertisement |
375 | with zero lifetime */ | |
376 | r = radv_send(ra, NULL, 0); | |
377 | if (r < 0) | |
abb977a6 | 378 | log_radv_errno(ra, r, "Unable to send last Router Advertisement with router lifetime set to zero, ignoring: %m"); |
204fb681 PF |
379 | |
380 | radv_reset(ra); | |
77baf5ae | 381 | ra->fd = safe_close(ra->fd); |
d6fc0d67 | 382 | ra->state = RADV_STATE_IDLE; |
204f99d2 PF |
383 | |
384 | return 0; | |
385 | } | |
386 | ||
17347053 | 387 | int sd_radv_start(sd_radv *ra) { |
f474884c | 388 | int r; |
204fb681 | 389 | |
204f99d2 PF |
390 | assert_return(ra, -EINVAL); |
391 | assert_return(ra->event, -EINVAL); | |
392 | assert_return(ra->ifindex > 0, -EINVAL); | |
393 | ||
d6fc0d67 | 394 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
395 | return 0; |
396 | ||
807a8ede | 397 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 398 | CLOCK_BOOTTIME, |
807a8ede YW |
399 | 0, 0, |
400 | radv_timeout, ra, | |
401 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
402 | if (r < 0) |
403 | goto fail; | |
404 | ||
77baf5ae PF |
405 | r = icmp6_bind_router_advertisement(ra->ifindex); |
406 | if (r < 0) | |
407 | goto fail; | |
408 | ||
409 | ra->fd = r; | |
88d5a3db PF |
410 | |
411 | r = sd_event_add_io(ra->event, &ra->recv_event_source, ra->fd, EPOLLIN, radv_recv, ra); | |
412 | if (r < 0) | |
413 | goto fail; | |
414 | ||
415 | r = sd_event_source_set_priority(ra->recv_event_source, ra->event_priority); | |
416 | if (r < 0) | |
417 | goto fail; | |
418 | ||
419 | (void) sd_event_source_set_description(ra->recv_event_source, "radv-receive-message"); | |
77baf5ae | 420 | |
d6fc0d67 | 421 | ra->state = RADV_STATE_ADVERTISING; |
204f99d2 | 422 | |
35388783 | 423 | log_radv(ra, "Started IPv6 Router Advertisement daemon"); |
204f99d2 PF |
424 | |
425 | return 0; | |
204fb681 PF |
426 | |
427 | fail: | |
428 | radv_reset(ra); | |
429 | ||
430 | return r; | |
204f99d2 PF |
431 | } |
432 | ||
17347053 | 433 | int sd_radv_set_ifindex(sd_radv *ra, int ifindex) { |
204f99d2 | 434 | assert_return(ra, -EINVAL); |
7fa69c0a | 435 | assert_return(ifindex > 0, -EINVAL); |
204f99d2 | 436 | |
d6fc0d67 | 437 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
438 | return -EBUSY; |
439 | ||
440 | ra->ifindex = ifindex; | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
61a9fa8f YW |
445 | int sd_radv_set_ifname(sd_radv *ra, const char *ifname) { |
446 | assert_return(ra, -EINVAL); | |
447 | assert_return(ifname, -EINVAL); | |
448 | ||
449 | if (!ifname_valid_full(ifname, IFNAME_VALID_ALTERNATIVE)) | |
450 | return -EINVAL; | |
451 | ||
452 | return free_and_strdup(&ra->ifname, ifname); | |
453 | } | |
454 | ||
5977b71f YW |
455 | int sd_radv_get_ifname(sd_radv *ra, const char **ret) { |
456 | int r; | |
457 | ||
458 | assert_return(ra, -EINVAL); | |
61a9fa8f | 459 | |
5977b71f YW |
460 | r = get_ifname(ra->ifindex, &ra->ifname); |
461 | if (r < 0) | |
462 | return r; | |
463 | ||
464 | if (ret) | |
465 | *ret = ra->ifname; | |
466 | ||
467 | return 0; | |
61a9fa8f YW |
468 | } |
469 | ||
17347053 | 470 | int sd_radv_set_mac(sd_radv *ra, const struct ether_addr *mac_addr) { |
204f99d2 PF |
471 | assert_return(ra, -EINVAL); |
472 | ||
d6fc0d67 | 473 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
474 | return -EBUSY; |
475 | ||
476 | if (mac_addr) | |
477 | ra->mac_addr = *mac_addr; | |
478 | else | |
479 | zero(ra->mac_addr); | |
480 | ||
481 | return 0; | |
482 | } | |
483 | ||
17347053 | 484 | int sd_radv_set_mtu(sd_radv *ra, uint32_t mtu) { |
204f99d2 PF |
485 | assert_return(ra, -EINVAL); |
486 | assert_return(mtu >= 1280, -EINVAL); | |
487 | ||
204f99d2 PF |
488 | ra->mtu = mtu; |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
17347053 | 493 | int sd_radv_set_hop_limit(sd_radv *ra, uint8_t hop_limit) { |
204f99d2 PF |
494 | assert_return(ra, -EINVAL); |
495 | ||
d6fc0d67 | 496 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
497 | return -EBUSY; |
498 | ||
499 | ra->hop_limit = hop_limit; | |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
eca280c8 | 504 | int sd_radv_set_retransmit(sd_radv *ra, uint64_t usec) { |
fdc4c67c SS |
505 | assert_return(ra, -EINVAL); |
506 | ||
507 | if (ra->state != RADV_STATE_IDLE) | |
508 | return -EBUSY; | |
509 | ||
eca280c8 YW |
510 | if (usec > RADV_MAX_RETRANSMIT_USEC) |
511 | return -EINVAL; | |
fdc4c67c | 512 | |
eca280c8 | 513 | ra->retransmit_usec = usec; |
fdc4c67c SS |
514 | return 0; |
515 | } | |
516 | ||
eca280c8 | 517 | int sd_radv_set_router_lifetime(sd_radv *ra, uint64_t usec) { |
204f99d2 PF |
518 | assert_return(ra, -EINVAL); |
519 | ||
d6fc0d67 | 520 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
521 | return -EBUSY; |
522 | ||
eca280c8 | 523 | if (!router_lifetime_is_valid(usec)) |
09457670 YW |
524 | return -EINVAL; |
525 | ||
ac138551 YW |
526 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
527 | * to (00) by the sender..." */ | |
eca280c8 | 528 | if (usec == 0 && |
204f99d2 | 529 | (ra->flags & (0x3 << 3)) != (SD_NDISC_PREFERENCE_MEDIUM << 3)) |
09457670 | 530 | return -EINVAL; |
204f99d2 | 531 | |
eca280c8 | 532 | ra->lifetime_usec = usec; |
204f99d2 PF |
533 | return 0; |
534 | } | |
535 | ||
17347053 | 536 | int sd_radv_set_managed_information(sd_radv *ra, int managed) { |
204f99d2 PF |
537 | assert_return(ra, -EINVAL); |
538 | ||
d6fc0d67 | 539 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
540 | return -EBUSY; |
541 | ||
542 | SET_FLAG(ra->flags, ND_RA_FLAG_MANAGED, managed); | |
543 | ||
544 | return 0; | |
545 | } | |
546 | ||
17347053 | 547 | int sd_radv_set_other_information(sd_radv *ra, int other) { |
204f99d2 PF |
548 | assert_return(ra, -EINVAL); |
549 | ||
d6fc0d67 | 550 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
551 | return -EBUSY; |
552 | ||
553 | SET_FLAG(ra->flags, ND_RA_FLAG_OTHER, other); | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
17347053 | 558 | int sd_radv_set_preference(sd_radv *ra, unsigned preference) { |
204f99d2 PF |
559 | assert_return(ra, -EINVAL); |
560 | assert_return(IN_SET(preference, | |
561 | SD_NDISC_PREFERENCE_LOW, | |
562 | SD_NDISC_PREFERENCE_MEDIUM, | |
563 | SD_NDISC_PREFERENCE_HIGH), -EINVAL); | |
564 | ||
dd1b1870 YW |
565 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
566 | * to (00) by the sender..." */ | |
7003b114 | 567 | if (ra->lifetime_usec == 0 && preference != SD_NDISC_PREFERENCE_MEDIUM) |
dd1b1870 YW |
568 | return -EINVAL; |
569 | ||
204f99d2 PF |
570 | ra->flags = (ra->flags & ~(0x3 << 3)) | (preference << 3); |
571 | ||
dd1b1870 | 572 | return 0; |
204f99d2 PF |
573 | } |
574 | ||
6a6d27bc SS |
575 | int sd_radv_set_home_agent_information(sd_radv *ra, int home_agent) { |
576 | assert_return(ra, -EINVAL); | |
577 | ||
578 | if (ra->state != RADV_STATE_IDLE) | |
579 | return -EBUSY; | |
580 | ||
581 | SET_FLAG(ra->flags, ND_RA_FLAG_HOME_AGENT, home_agent); | |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
586 | int sd_radv_set_home_agent_preference(sd_radv *ra, uint16_t preference) { | |
587 | assert_return(ra, -EINVAL); | |
588 | ||
589 | if (ra->state != RADV_STATE_IDLE) | |
590 | return -EBUSY; | |
591 | ||
592 | ra->home_agent.nd_opt_home_agent_info_preference = htobe16(preference); | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
eca280c8 | 597 | int sd_radv_set_home_agent_lifetime(sd_radv *ra, uint64_t lifetime_usec) { |
6a6d27bc SS |
598 | assert_return(ra, -EINVAL); |
599 | ||
600 | if (ra->state != RADV_STATE_IDLE) | |
601 | return -EBUSY; | |
602 | ||
eca280c8 YW |
603 | if (lifetime_usec > RADV_HOME_AGENT_MAX_LIFETIME_USEC) |
604 | return -EINVAL; | |
6a6d27bc | 605 | |
eca280c8 | 606 | ra->home_agent.nd_opt_home_agent_info_lifetime = usec_to_be16_sec(lifetime_usec); |
6a6d27bc SS |
607 | return 0; |
608 | } | |
609 | ||
17347053 | 610 | int sd_radv_add_prefix(sd_radv *ra, sd_radv_prefix *p) { |
03677889 | 611 | sd_radv_prefix *found = NULL; |
d601b566 | 612 | int r; |
204f99d2 PF |
613 | |
614 | assert_return(ra, -EINVAL); | |
acbb5500 | 615 | assert_return(p, -EINVAL); |
204f99d2 | 616 | |
59ea6e57 | 617 | /* Refuse prefixes that don't have a prefix set */ |
94876904 | 618 | if (in6_addr_is_null(&p->opt.in6_addr)) |
59ea6e57 LP |
619 | return -ENOEXEC; |
620 | ||
c71384a9 | 621 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
5380707a | 622 | |
204f99d2 | 623 | LIST_FOREACH(prefix, cur, ra->prefixes) { |
204f99d2 | 624 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 625 | (const union in_addr_union*) &cur->opt.in6_addr, |
204f99d2 | 626 | cur->opt.prefixlen, |
c633628d | 627 | (const union in_addr_union*) &p->opt.in6_addr, |
204f99d2 | 628 | p->opt.prefixlen); |
5380707a YW |
629 | if (r < 0) |
630 | return r; | |
631 | if (r == 0) | |
632 | continue; | |
204f99d2 | 633 | |
95e104e0 | 634 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 635 | found = cur; |
b9f27a05 | 636 | break; |
95e104e0 | 637 | } |
d601b566 | 638 | |
35388783 | 639 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 640 | "IPv6 prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
641 | addr_p, |
642 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
204f99d2 PF |
643 | } |
644 | ||
56aa5143 | 645 | if (found) { |
b9f27a05 YW |
646 | /* p and cur may be equivalent. First increment the reference counter. */ |
647 | sd_radv_prefix_ref(p); | |
648 | ||
649 | /* Then, remove the old entry. */ | |
56aa5143 YW |
650 | LIST_REMOVE(prefix, ra->prefixes, found); |
651 | sd_radv_prefix_unref(found); | |
b9f27a05 YW |
652 | |
653 | /* Finally, add the new entry. */ | |
654 | LIST_APPEND(prefix, ra->prefixes, p); | |
655 | ||
656 | log_radv(ra, "Updated/replaced IPv6 prefix %s (preferred: %s, valid: %s)", | |
c71384a9 | 657 | addr_p, |
b9f27a05 YW |
658 | FORMAT_TIMESPAN(p->lifetime_preferred_usec, USEC_PER_SEC), |
659 | FORMAT_TIMESPAN(p->lifetime_valid_usec, USEC_PER_SEC)); | |
660 | } else { | |
661 | /* The prefix is new. Let's simply add it. */ | |
662 | ||
663 | sd_radv_prefix_ref(p); | |
664 | LIST_APPEND(prefix, ra->prefixes, p); | |
665 | ra->n_prefixes++; | |
204f99d2 | 666 | |
c71384a9 | 667 | log_radv(ra, "Added prefix %s", addr_p); |
b9f27a05 | 668 | } |
059d7b6e YW |
669 | |
670 | if (ra->state == RADV_STATE_IDLE) | |
671 | return 0; | |
672 | ||
059d7b6e | 673 | if (ra->ra_sent == 0) |
d601b566 | 674 | return 0; |
d601b566 | 675 | |
97efde65 | 676 | /* If RAs have already been sent, send an RA immediately to announce the newly-added prefix */ |
059d7b6e YW |
677 | r = radv_send(ra, NULL, ra->lifetime_usec); |
678 | if (r < 0) | |
abb977a6 | 679 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added prefix %s, ignoring: %m", addr_p); |
059d7b6e | 680 | else |
c71384a9 | 681 | log_radv(ra, "Sent Router Advertisement for added/updated prefix %s.", addr_p); |
97efde65 | 682 | |
204f99d2 PF |
683 | return 0; |
684 | } | |
685 | ||
95931532 YW |
686 | void sd_radv_remove_prefix( |
687 | sd_radv *ra, | |
688 | const struct in6_addr *prefix, | |
689 | unsigned char prefixlen) { | |
34c169c4 | 690 | |
95931532 YW |
691 | if (!ra) |
692 | return; | |
34c169c4 | 693 | |
95931532 YW |
694 | if (!prefix) |
695 | return; | |
696 | ||
697 | LIST_FOREACH(prefix, cur, ra->prefixes) { | |
34c169c4 PF |
698 | if (prefixlen != cur->opt.prefixlen) |
699 | continue; | |
700 | ||
94876904 | 701 | if (!in6_addr_equal(prefix, &cur->opt.in6_addr)) |
34c169c4 PF |
702 | continue; |
703 | ||
704 | LIST_REMOVE(prefix, ra->prefixes, cur); | |
705 | ra->n_prefixes--; | |
62bbbedf | 706 | sd_radv_prefix_unref(cur); |
95931532 | 707 | return; |
34c169c4 | 708 | } |
34c169c4 PF |
709 | } |
710 | ||
17347053 | 711 | int sd_radv_add_route_prefix(sd_radv *ra, sd_radv_route_prefix *p) { |
03677889 | 712 | sd_radv_route_prefix *found = NULL; |
203d4df5 SS |
713 | int r; |
714 | ||
715 | assert_return(ra, -EINVAL); | |
acbb5500 | 716 | assert_return(p, -EINVAL); |
203d4df5 | 717 | |
c71384a9 | 718 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
203d4df5 SS |
719 | |
720 | LIST_FOREACH(prefix, cur, ra->route_prefixes) { | |
203d4df5 | 721 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 722 | (const union in_addr_union*) &cur->opt.in6_addr, |
203d4df5 | 723 | cur->opt.prefixlen, |
c633628d | 724 | (const union in_addr_union*) &p->opt.in6_addr, |
203d4df5 SS |
725 | p->opt.prefixlen); |
726 | if (r < 0) | |
727 | return r; | |
728 | if (r == 0) | |
729 | continue; | |
730 | ||
95e104e0 | 731 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 732 | found = cur; |
b9f27a05 | 733 | break; |
95e104e0 | 734 | } |
203d4df5 | 735 | |
35388783 | 736 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 737 | "IPv6 route prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
738 | addr_p, |
739 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
203d4df5 SS |
740 | } |
741 | ||
56aa5143 | 742 | if (found) { |
b9f27a05 YW |
743 | /* p and cur may be equivalent. First increment the reference counter. */ |
744 | sd_radv_route_prefix_ref(p); | |
745 | ||
746 | /* Then, remove the old entry. */ | |
56aa5143 YW |
747 | LIST_REMOVE(prefix, ra->route_prefixes, found); |
748 | sd_radv_route_prefix_unref(found); | |
b9f27a05 YW |
749 | |
750 | /* Finally, add the new entry. */ | |
751 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
752 | ||
753 | log_radv(ra, "Updated/replaced IPv6 route prefix %s (lifetime: %s)", | |
754 | strna(addr_p), | |
755 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
756 | } else { | |
757 | /* The route prefix is new. Let's simply add it. */ | |
758 | ||
759 | sd_radv_route_prefix_ref(p); | |
760 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
761 | ra->n_route_prefixes++; | |
762 | ||
763 | log_radv(ra, "Added route prefix %s", strna(addr_p)); | |
764 | } | |
059d7b6e YW |
765 | |
766 | if (ra->state == RADV_STATE_IDLE) | |
767 | return 0; | |
768 | ||
059d7b6e | 769 | if (ra->ra_sent == 0) |
203d4df5 | 770 | return 0; |
203d4df5 | 771 | |
97efde65 | 772 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ |
059d7b6e YW |
773 | r = radv_send(ra, NULL, ra->lifetime_usec); |
774 | if (r < 0) | |
abb977a6 | 775 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added route prefix %s, ignoring: %m", |
b9f27a05 | 776 | strna(addr_p)); |
059d7b6e | 777 | else |
b9f27a05 | 778 | log_radv(ra, "Sent Router Advertisement for added route prefix %s.", strna(addr_p)); |
97efde65 | 779 | |
203d4df5 SS |
780 | return 0; |
781 | } | |
782 | ||
1925f829 SS |
783 | int sd_radv_add_pref64_prefix(sd_radv *ra, sd_radv_pref64_prefix *p) { |
784 | sd_radv_pref64_prefix *found = NULL; | |
785 | int r; | |
786 | ||
787 | assert_return(ra, -EINVAL); | |
788 | assert_return(p, -EINVAL); | |
789 | ||
790 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->in6_addr, p->prefixlen); | |
791 | ||
792 | LIST_FOREACH(prefix, cur, ra->pref64_prefixes) { | |
793 | r = in_addr_prefix_intersect(AF_INET6, | |
794 | (const union in_addr_union*) &cur->in6_addr, | |
795 | cur->prefixlen, | |
796 | (const union in_addr_union*) &p->in6_addr, | |
797 | p->prefixlen); | |
798 | if (r < 0) | |
799 | return r; | |
800 | if (r == 0) | |
801 | continue; | |
802 | ||
803 | if (cur->prefixlen == p->prefixlen) { | |
804 | found = cur; | |
805 | break; | |
806 | } | |
807 | ||
808 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), | |
809 | "IPv6 PREF64 prefix %s conflicts with %s, ignoring.", | |
810 | addr_p, | |
811 | IN6_ADDR_PREFIX_TO_STRING(&cur->in6_addr, cur->prefixlen)); | |
812 | } | |
813 | ||
814 | if (found) { | |
815 | /* p and cur may be equivalent. First increment the reference counter. */ | |
816 | sd_radv_pref64_prefix_ref(p); | |
817 | ||
818 | /* Then, remove the old entry. */ | |
819 | LIST_REMOVE(prefix, ra->pref64_prefixes, found); | |
820 | sd_radv_pref64_prefix_unref(found); | |
821 | ||
822 | /* Finally, add the new entry. */ | |
823 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
824 | ||
825 | log_radv(ra, "Updated/replaced IPv6 PREF64 prefix %s (lifetime: %s)", | |
826 | strna(addr_p), | |
827 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
828 | } else { | |
829 | /* The route prefix is new. Let's simply add it. */ | |
830 | ||
831 | sd_radv_pref64_prefix_ref(p); | |
832 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
833 | ra->n_pref64_prefixes++; | |
834 | ||
835 | log_radv(ra, "Added PREF64 prefix %s", strna(addr_p)); | |
836 | } | |
837 | ||
838 | if (ra->state == RADV_STATE_IDLE) | |
839 | return 0; | |
840 | ||
841 | if (ra->ra_sent == 0) | |
842 | return 0; | |
843 | ||
844 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ | |
845 | r = radv_send(ra, NULL, ra->lifetime_usec); | |
846 | if (r < 0) | |
847 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added PREF64 prefix %s, ignoring: %m", | |
848 | strna(addr_p)); | |
849 | else | |
850 | log_radv(ra, "Sent Router Advertisement for added PREF64 prefix %s.", strna(addr_p)); | |
851 | ||
852 | return 0; | |
853 | } | |
854 | ||
faaf3d66 YW |
855 | int sd_radv_set_rdnss( |
856 | sd_radv *ra, | |
eca280c8 | 857 | uint64_t lifetime_usec, |
faaf3d66 YW |
858 | const struct in6_addr *dns, |
859 | size_t n_dns) { | |
860 | ||
e9c6da38 PF |
861 | _cleanup_free_ struct sd_radv_opt_dns *opt_rdnss = NULL; |
862 | size_t len; | |
863 | ||
864 | assert_return(ra, -EINVAL); | |
865 | assert_return(n_dns < 128, -EINVAL); | |
866 | ||
eca280c8 YW |
867 | if (lifetime_usec > RADV_RDNSS_MAX_LIFETIME_USEC) |
868 | return -EINVAL; | |
869 | ||
e9c6da38 PF |
870 | if (!dns || n_dns == 0) { |
871 | ra->rdnss = mfree(ra->rdnss); | |
872 | ra->n_rdnss = 0; | |
873 | ||
874 | return 0; | |
875 | } | |
876 | ||
877 | len = sizeof(struct sd_radv_opt_dns) + sizeof(struct in6_addr) * n_dns; | |
878 | ||
879 | opt_rdnss = malloc0(len); | |
880 | if (!opt_rdnss) | |
881 | return -ENOMEM; | |
882 | ||
d6fc0d67 | 883 | opt_rdnss->type = RADV_OPT_RDNSS; |
e9c6da38 | 884 | opt_rdnss->length = len / 8; |
eca280c8 | 885 | opt_rdnss->lifetime = usec_to_be32_sec(lifetime_usec); |
e9c6da38 PF |
886 | |
887 | memcpy(opt_rdnss + 1, dns, n_dns * sizeof(struct in6_addr)); | |
888 | ||
1cc6c93a | 889 | free_and_replace(ra->rdnss, opt_rdnss); |
e9c6da38 PF |
890 | |
891 | ra->n_rdnss = n_dns; | |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
faaf3d66 YW |
896 | int sd_radv_set_dnssl( |
897 | sd_radv *ra, | |
eca280c8 | 898 | uint64_t lifetime_usec, |
faaf3d66 YW |
899 | char **search_list) { |
900 | ||
e965d6ab PF |
901 | _cleanup_free_ struct sd_radv_opt_dns *opt_dnssl = NULL; |
902 | size_t len = 0; | |
e965d6ab PF |
903 | uint8_t *p; |
904 | ||
905 | assert_return(ra, -EINVAL); | |
906 | ||
eca280c8 YW |
907 | if (lifetime_usec > RADV_DNSSL_MAX_LIFETIME_USEC) |
908 | return -EINVAL; | |
909 | ||
97d7974b | 910 | if (strv_isempty(search_list)) { |
e965d6ab | 911 | ra->dnssl = mfree(ra->dnssl); |
e965d6ab PF |
912 | return 0; |
913 | } | |
914 | ||
915 | STRV_FOREACH(s, search_list) | |
916 | len += strlen(*s) + 2; | |
917 | ||
918 | len = (sizeof(struct sd_radv_opt_dns) + len + 7) & ~0x7; | |
919 | ||
920 | opt_dnssl = malloc0(len); | |
921 | if (!opt_dnssl) | |
922 | return -ENOMEM; | |
923 | ||
d6fc0d67 | 924 | opt_dnssl->type = RADV_OPT_DNSSL; |
e965d6ab | 925 | opt_dnssl->length = len / 8; |
eca280c8 | 926 | opt_dnssl->lifetime = usec_to_be32_sec(lifetime_usec); |
e965d6ab PF |
927 | |
928 | p = (uint8_t *)(opt_dnssl + 1); | |
929 | len -= sizeof(struct sd_radv_opt_dns); | |
930 | ||
931 | STRV_FOREACH(s, search_list) { | |
932 | int r; | |
933 | ||
934 | r = dns_name_to_wire_format(*s, p, len, false); | |
935 | if (r < 0) | |
936 | return r; | |
937 | ||
938 | if (len < (size_t)r) | |
939 | return -ENOBUFS; | |
940 | ||
941 | p += r; | |
942 | len -= r; | |
943 | } | |
944 | ||
1cc6c93a | 945 | free_and_replace(ra->dnssl, opt_dnssl); |
e965d6ab PF |
946 | |
947 | return 0; | |
948 | } | |
949 | ||
17347053 | 950 | int sd_radv_prefix_new(sd_radv_prefix **ret) { |
d2c8eed2 | 951 | sd_radv_prefix *p; |
04473969 PF |
952 | |
953 | assert_return(ret, -EINVAL); | |
954 | ||
d2c8eed2 | 955 | p = new(sd_radv_prefix, 1); |
04473969 PF |
956 | if (!p) |
957 | return -ENOMEM; | |
958 | ||
d2c8eed2 LP |
959 | *p = (sd_radv_prefix) { |
960 | .n_ref = 1, | |
04473969 | 961 | |
d2c8eed2 LP |
962 | .opt.type = ND_OPT_PREFIX_INFORMATION, |
963 | .opt.length = (sizeof(p->opt) - 1)/8 + 1, | |
964 | .opt.prefixlen = 64, | |
04473969 | 965 | |
d2c8eed2 LP |
966 | /* RFC 4861, Section 6.2.1 */ |
967 | .opt.flags = ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO, | |
204f99d2 | 968 | |
d951507d YW |
969 | .lifetime_valid_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
970 | .lifetime_preferred_usec = RADV_DEFAULT_PREFERRED_LIFETIME_USEC, | |
95e104e0 YW |
971 | .valid_until = USEC_INFINITY, |
972 | .preferred_until = USEC_INFINITY, | |
d2c8eed2 | 973 | }; |
04473969 | 974 | |
d2c8eed2 | 975 | *ret = p; |
04473969 PF |
976 | return 0; |
977 | } | |
978 | ||
8301aa0b | 979 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_prefix, sd_radv_prefix, mfree); |
04473969 | 980 | |
faaf3d66 YW |
981 | int sd_radv_prefix_set_prefix( |
982 | sd_radv_prefix *p, | |
983 | const struct in6_addr *in6_addr, | |
984 | unsigned char prefixlen) { | |
985 | ||
04473969 PF |
986 | assert_return(p, -EINVAL); |
987 | assert_return(in6_addr, -EINVAL); | |
988 | ||
989 | if (prefixlen < 3 || prefixlen > 128) | |
990 | return -EINVAL; | |
991 | ||
992 | if (prefixlen > 64) | |
993 | /* unusual but allowed, log it */ | |
35388783 | 994 | log_radv(NULL, "Unusual prefix length %d greater than 64", prefixlen); |
04473969 PF |
995 | |
996 | p->opt.in6_addr = *in6_addr; | |
997 | p->opt.prefixlen = prefixlen; | |
998 | ||
999 | return 0; | |
1000 | } | |
1001 | ||
faaf3d66 YW |
1002 | int sd_radv_prefix_get_prefix( |
1003 | sd_radv_prefix *p, | |
1004 | struct in6_addr *ret_in6_addr, | |
1005 | unsigned char *ret_prefixlen) { | |
1006 | ||
34332af2 SS |
1007 | assert_return(p, -EINVAL); |
1008 | assert_return(ret_in6_addr, -EINVAL); | |
1009 | assert_return(ret_prefixlen, -EINVAL); | |
1010 | ||
1011 | *ret_in6_addr = p->opt.in6_addr; | |
1012 | *ret_prefixlen = p->opt.prefixlen; | |
1013 | ||
1014 | return 0; | |
1015 | } | |
1016 | ||
17347053 | 1017 | int sd_radv_prefix_set_onlink(sd_radv_prefix *p, int onlink) { |
04473969 PF |
1018 | assert_return(p, -EINVAL); |
1019 | ||
1020 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, onlink); | |
1021 | ||
1022 | return 0; | |
1023 | } | |
1024 | ||
faaf3d66 | 1025 | int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix *p, int address_autoconfiguration) { |
04473969 PF |
1026 | assert_return(p, -EINVAL); |
1027 | ||
1028 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, address_autoconfiguration); | |
1029 | ||
1030 | return 0; | |
1031 | } | |
1032 | ||
17347053 | 1033 | int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
1034 | assert_return(p, -EINVAL); |
1035 | ||
95e104e0 YW |
1036 | p->lifetime_valid_usec = lifetime_usec; |
1037 | p->valid_until = valid_until; | |
04473969 PF |
1038 | |
1039 | return 0; | |
1040 | } | |
1041 | ||
17347053 | 1042 | int sd_radv_prefix_set_preferred_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
1043 | assert_return(p, -EINVAL); |
1044 | ||
95e104e0 YW |
1045 | p->lifetime_preferred_usec = lifetime_usec; |
1046 | p->preferred_until = valid_until; | |
04473969 PF |
1047 | |
1048 | return 0; | |
1049 | } | |
203d4df5 | 1050 | |
17347053 | 1051 | int sd_radv_route_prefix_new(sd_radv_route_prefix **ret) { |
203d4df5 SS |
1052 | sd_radv_route_prefix *p; |
1053 | ||
1054 | assert_return(ret, -EINVAL); | |
1055 | ||
1056 | p = new(sd_radv_route_prefix, 1); | |
1057 | if (!p) | |
1058 | return -ENOMEM; | |
1059 | ||
1060 | *p = (sd_radv_route_prefix) { | |
1061 | .n_ref = 1, | |
1062 | ||
d6fc0d67 | 1063 | .opt.type = RADV_OPT_ROUTE_INFORMATION, |
203d4df5 SS |
1064 | .opt.length = DIV_ROUND_UP(sizeof(p->opt), 8), |
1065 | .opt.prefixlen = 64, | |
1066 | ||
d951507d | 1067 | .lifetime_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
95e104e0 | 1068 | .valid_until = USEC_INFINITY, |
203d4df5 SS |
1069 | }; |
1070 | ||
1071 | *ret = p; | |
1072 | return 0; | |
1073 | } | |
1074 | ||
1075 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_route_prefix, sd_radv_route_prefix, mfree); | |
1076 | ||
faaf3d66 YW |
1077 | int sd_radv_route_prefix_set_prefix( |
1078 | sd_radv_route_prefix *p, | |
1079 | const struct in6_addr *in6_addr, | |
1080 | unsigned char prefixlen) { | |
1081 | ||
203d4df5 SS |
1082 | assert_return(p, -EINVAL); |
1083 | assert_return(in6_addr, -EINVAL); | |
1084 | ||
1085 | if (prefixlen > 128) | |
1086 | return -EINVAL; | |
1087 | ||
1088 | if (prefixlen > 64) | |
1089 | /* unusual but allowed, log it */ | |
35388783 | 1090 | log_radv(NULL, "Unusual prefix length %u greater than 64", prefixlen); |
203d4df5 SS |
1091 | |
1092 | p->opt.in6_addr = *in6_addr; | |
1093 | p->opt.prefixlen = prefixlen; | |
1094 | ||
1095 | return 0; | |
1096 | } | |
1097 | ||
17347053 | 1098 | int sd_radv_route_prefix_set_lifetime(sd_radv_route_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
203d4df5 SS |
1099 | assert_return(p, -EINVAL); |
1100 | ||
95e104e0 YW |
1101 | p->lifetime_usec = lifetime_usec; |
1102 | p->valid_until = valid_until; | |
203d4df5 SS |
1103 | |
1104 | return 0; | |
1105 | } | |
1925f829 SS |
1106 | |
1107 | int sd_radv_pref64_prefix_new(sd_radv_pref64_prefix **ret) { | |
1108 | sd_radv_pref64_prefix *p; | |
1109 | ||
1110 | assert_return(ret, -EINVAL); | |
1111 | ||
1112 | p = new(sd_radv_pref64_prefix, 1); | |
1113 | if (!p) | |
1114 | return -ENOMEM; | |
1115 | ||
1116 | *p = (sd_radv_pref64_prefix) { | |
1117 | .n_ref = 1, | |
1118 | ||
1119 | .opt.type = RADV_OPT_PREF64, | |
1120 | .opt.length = 2, | |
1121 | }; | |
1122 | ||
1123 | *ret = p; | |
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_pref64_prefix, sd_radv_pref64_prefix, mfree); | |
1128 | ||
1129 | int sd_radv_pref64_prefix_set_prefix( | |
1130 | sd_radv_pref64_prefix *p, | |
1131 | const struct in6_addr *prefix, | |
1132 | uint8_t prefixlen, | |
1133 | uint64_t lifetime_usec) { | |
1134 | ||
1135 | uint16_t pref64_lifetime; | |
1136 | uint8_t prefixlen_code; | |
6e8f5e4c | 1137 | int r; |
1925f829 SS |
1138 | |
1139 | assert_return(p, -EINVAL); | |
1140 | assert_return(prefix, -EINVAL); | |
1141 | ||
6e8f5e4c SS |
1142 | r = pref64_prefix_length_to_plc(prefixlen, &prefixlen_code); |
1143 | if (r < 0) | |
f31fa080 ZJS |
1144 | return log_radv_errno(NULL, r, |
1145 | "Unsupported PREF64 prefix length %u. Valid lengths are 32, 40, 48, 56, 64 and 96", prefixlen); | |
1925f829 | 1146 | |
eca280c8 | 1147 | if (lifetime_usec > PREF64_MAX_LIFETIME_USEC) |
1925f829 SS |
1148 | return -EINVAL; |
1149 | ||
1150 | /* RFC 8781 - 4.1 rounding up lifetime to multiply of 8 */ | |
1151 | pref64_lifetime = DIV_ROUND_UP(lifetime_usec, 8 * USEC_PER_SEC) << 3; | |
1152 | pref64_lifetime |= prefixlen_code; | |
1153 | ||
1154 | unaligned_write_be16(&p->opt.lifetime_and_plc, pref64_lifetime); | |
1155 | memcpy(&p->opt.prefix, prefix, sizeof(p->opt.prefix)); | |
1156 | ||
1157 | p->in6_addr = *prefix; | |
1158 | p->prefixlen = prefixlen; | |
1159 | ||
1160 | return 0; | |
1161 | } |