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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 | 123 | static bool router_lifetime_is_valid(usec_t lifetime_usec) { |
36653443 | 124 | assert_cc(RADV_MAX_ROUTER_LIFETIME_USEC <= UINT16_MAX * USEC_PER_SEC); |
09457670 YW |
125 | return lifetime_usec == 0 || |
126 | (lifetime_usec >= RADV_MIN_ROUTER_LIFETIME_USEC && | |
127 | lifetime_usec <= RADV_MAX_ROUTER_LIFETIME_USEC); | |
128 | } | |
129 | ||
36653443 YW |
130 | static int radv_send_router(sd_radv *ra, const struct in6_addr *dst, usec_t lifetime_usec) { |
131 | assert(ra); | |
132 | assert(router_lifetime_is_valid(lifetime_usec)); | |
133 | ||
77baf5ae PF |
134 | struct sockaddr_in6 dst_addr = { |
135 | .sin6_family = AF_INET6, | |
136 | .sin6_addr = IN6ADDR_ALL_NODES_MULTICAST_INIT, | |
137 | }; | |
36653443 YW |
138 | struct nd_router_advert adv = { |
139 | .nd_ra_type = ND_ROUTER_ADVERT, | |
140 | .nd_ra_router_lifetime = usec_to_be16_sec(lifetime_usec), | |
141 | .nd_ra_retransmit = usec_to_be32_msec(ra->retransmit_usec), | |
142 | }; | |
77baf5ae PF |
143 | struct { |
144 | struct nd_opt_hdr opthdr; | |
145 | struct ether_addr slladdr; | |
146 | } _packed_ opt_mac = { | |
147 | .opthdr = { | |
148 | .nd_opt_type = ND_OPT_SOURCE_LINKADDR, | |
36653443 | 149 | .nd_opt_len = DIV_ROUND_UP(sizeof(struct nd_opt_hdr) + sizeof(struct ether_addr), 8), |
77baf5ae | 150 | }, |
36653443 | 151 | .slladdr = ra->mac_addr, |
77baf5ae PF |
152 | }; |
153 | struct nd_opt_mtu opt_mtu = { | |
154 | .nd_opt_mtu_type = ND_OPT_MTU, | |
155 | .nd_opt_mtu_len = 1, | |
36653443 | 156 | .nd_opt_mtu_mtu = htobe32(ra->mtu), |
77baf5ae | 157 | }; |
ac63c8df YW |
158 | /* Reserve iov space for RA header, linkaddr, MTU, N prefixes, N routes, N pref64 prefixes, RDNSS, |
159 | * DNSSL, and home agent. */ | |
160 | struct iovec iov[6 + ra->n_prefixes + ra->n_route_prefixes + ra->n_pref64_prefixes]; | |
77baf5ae PF |
161 | struct msghdr msg = { |
162 | .msg_name = &dst_addr, | |
163 | .msg_namelen = sizeof(dst_addr), | |
164 | .msg_iov = iov, | |
165 | }; | |
d601b566 PF |
166 | usec_t time_now; |
167 | int r; | |
168 | ||
ba4e0427 | 169 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
d601b566 PF |
170 | if (r < 0) |
171 | return r; | |
77baf5ae | 172 | |
94876904 | 173 | if (dst && in6_addr_is_set(dst)) |
77baf5ae | 174 | dst_addr.sin6_addr = *dst; |
88d5a3db | 175 | |
36653443 YW |
176 | /* The nd_ra_curhoplimit and nd_ra_flags_reserved fields cannot specified with nd_ra_router_lifetime |
177 | * simultaneously in the structured initializer in the above. */ | |
77baf5ae PF |
178 | adv.nd_ra_curhoplimit = ra->hop_limit; |
179 | adv.nd_ra_flags_reserved = ra->flags; | |
5cfa2c3d | 180 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&adv, sizeof(adv)); |
77baf5ae | 181 | |
36653443 YW |
182 | /* MAC address is optional, either because the link does not use L2 addresses or load sharing is |
183 | * desired. See RFC 4861, Section 4.2. */ | |
184 | if (!ether_addr_is_null(&ra->mac_addr)) | |
5cfa2c3d | 185 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mac, sizeof(opt_mac)); |
77baf5ae | 186 | |
36653443 | 187 | if (ra->mtu > 0) |
5cfa2c3d | 188 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mtu, sizeof(opt_mtu)); |
77baf5ae PF |
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: | |
36653443 | 266 | log_radv(ra, "Received RS from neither link-local nor null address, ignoring."); |
1f2db2e3 | 267 | return 0; |
88d5a3db PF |
268 | |
269 | case -EMULTIHOP: | |
36653443 | 270 | log_radv(ra, "Received RS with invalid hop limit, ignoring."); |
1f2db2e3 | 271 | return 0; |
88d5a3db PF |
272 | |
273 | case -EPFNOSUPPORT: | |
36653443 | 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); |
36653443 | 291 | r = radv_send_router(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 |
36653443 | 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 | ||
36653443 | 313 | r = radv_send_router(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 | |
36653443 YW |
373 | /* RFC 4861, Section 6.2.5: |
374 | * the router SHOULD transmit one or more (but not more than MAX_FINAL_RTR_ADVERTISEMENTS) final | |
375 | * multicast Router Advertisements on the interface with a Router Lifetime field of zero. */ | |
376 | r = radv_send_router(ra, NULL, 0); | |
290696e5 | 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 | ||
36653443 YW |
387 | static int radv_setup_recv_event(sd_radv *ra) { |
388 | int r; | |
389 | ||
390 | assert(ra); | |
391 | assert(ra->event); | |
392 | assert(ra->ifindex > 0); | |
393 | ||
394 | _cleanup_close_ int fd = -EBADF; | |
395 | fd = icmp6_bind(ra->ifindex, /* is_router = */ true); | |
396 | if (fd < 0) | |
397 | return fd; | |
398 | ||
399 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
400 | r = sd_event_add_io(ra->event, &s, fd, EPOLLIN, radv_recv, ra); | |
401 | if (r < 0) | |
402 | return r; | |
403 | ||
404 | r = sd_event_source_set_priority(s, ra->event_priority); | |
405 | if (r < 0) | |
406 | return r; | |
407 | ||
408 | (void) sd_event_source_set_description(s, "radv-receive-message"); | |
409 | ||
410 | ra->fd = TAKE_FD(fd); | |
411 | ra->recv_event_source = TAKE_PTR(s); | |
412 | return 0; | |
413 | } | |
414 | ||
17347053 | 415 | int sd_radv_start(sd_radv *ra) { |
f474884c | 416 | int r; |
204fb681 | 417 | |
204f99d2 PF |
418 | assert_return(ra, -EINVAL); |
419 | assert_return(ra->event, -EINVAL); | |
420 | assert_return(ra->ifindex > 0, -EINVAL); | |
421 | ||
d6fc0d67 | 422 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
423 | return 0; |
424 | ||
36653443 YW |
425 | r = radv_setup_recv_event(ra); |
426 | if (r < 0) | |
427 | goto fail; | |
428 | ||
807a8ede | 429 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 430 | CLOCK_BOOTTIME, |
807a8ede YW |
431 | 0, 0, |
432 | radv_timeout, ra, | |
433 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
434 | if (r < 0) |
435 | goto fail; | |
436 | ||
d6fc0d67 | 437 | ra->state = RADV_STATE_ADVERTISING; |
204f99d2 | 438 | |
35388783 | 439 | log_radv(ra, "Started IPv6 Router Advertisement daemon"); |
204f99d2 PF |
440 | |
441 | return 0; | |
204fb681 PF |
442 | |
443 | fail: | |
444 | radv_reset(ra); | |
445 | ||
446 | return r; | |
204f99d2 PF |
447 | } |
448 | ||
17347053 | 449 | int sd_radv_set_ifindex(sd_radv *ra, int ifindex) { |
204f99d2 | 450 | assert_return(ra, -EINVAL); |
7fa69c0a | 451 | assert_return(ifindex > 0, -EINVAL); |
204f99d2 | 452 | |
d6fc0d67 | 453 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
454 | return -EBUSY; |
455 | ||
456 | ra->ifindex = ifindex; | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
61a9fa8f YW |
461 | int sd_radv_set_ifname(sd_radv *ra, const char *ifname) { |
462 | assert_return(ra, -EINVAL); | |
463 | assert_return(ifname, -EINVAL); | |
464 | ||
465 | if (!ifname_valid_full(ifname, IFNAME_VALID_ALTERNATIVE)) | |
466 | return -EINVAL; | |
467 | ||
468 | return free_and_strdup(&ra->ifname, ifname); | |
469 | } | |
470 | ||
5977b71f YW |
471 | int sd_radv_get_ifname(sd_radv *ra, const char **ret) { |
472 | int r; | |
473 | ||
474 | assert_return(ra, -EINVAL); | |
61a9fa8f | 475 | |
5977b71f YW |
476 | r = get_ifname(ra->ifindex, &ra->ifname); |
477 | if (r < 0) | |
478 | return r; | |
479 | ||
480 | if (ret) | |
481 | *ret = ra->ifname; | |
482 | ||
483 | return 0; | |
61a9fa8f YW |
484 | } |
485 | ||
17347053 | 486 | int sd_radv_set_mac(sd_radv *ra, const struct ether_addr *mac_addr) { |
204f99d2 PF |
487 | assert_return(ra, -EINVAL); |
488 | ||
d6fc0d67 | 489 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
490 | return -EBUSY; |
491 | ||
492 | if (mac_addr) | |
493 | ra->mac_addr = *mac_addr; | |
494 | else | |
495 | zero(ra->mac_addr); | |
496 | ||
497 | return 0; | |
498 | } | |
499 | ||
17347053 | 500 | int sd_radv_set_mtu(sd_radv *ra, uint32_t mtu) { |
204f99d2 PF |
501 | assert_return(ra, -EINVAL); |
502 | assert_return(mtu >= 1280, -EINVAL); | |
503 | ||
204f99d2 PF |
504 | ra->mtu = mtu; |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
17347053 | 509 | int sd_radv_set_hop_limit(sd_radv *ra, uint8_t hop_limit) { |
204f99d2 PF |
510 | assert_return(ra, -EINVAL); |
511 | ||
d6fc0d67 | 512 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
513 | return -EBUSY; |
514 | ||
515 | ra->hop_limit = hop_limit; | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
eca280c8 | 520 | int sd_radv_set_retransmit(sd_radv *ra, uint64_t usec) { |
fdc4c67c SS |
521 | assert_return(ra, -EINVAL); |
522 | ||
523 | if (ra->state != RADV_STATE_IDLE) | |
524 | return -EBUSY; | |
525 | ||
eca280c8 YW |
526 | if (usec > RADV_MAX_RETRANSMIT_USEC) |
527 | return -EINVAL; | |
fdc4c67c | 528 | |
eca280c8 | 529 | ra->retransmit_usec = usec; |
fdc4c67c SS |
530 | return 0; |
531 | } | |
532 | ||
eca280c8 | 533 | int sd_radv_set_router_lifetime(sd_radv *ra, uint64_t usec) { |
204f99d2 PF |
534 | assert_return(ra, -EINVAL); |
535 | ||
d6fc0d67 | 536 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
537 | return -EBUSY; |
538 | ||
eca280c8 | 539 | if (!router_lifetime_is_valid(usec)) |
09457670 YW |
540 | return -EINVAL; |
541 | ||
ac138551 YW |
542 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
543 | * to (00) by the sender..." */ | |
eca280c8 | 544 | if (usec == 0 && |
204f99d2 | 545 | (ra->flags & (0x3 << 3)) != (SD_NDISC_PREFERENCE_MEDIUM << 3)) |
09457670 | 546 | return -EINVAL; |
204f99d2 | 547 | |
eca280c8 | 548 | ra->lifetime_usec = usec; |
204f99d2 PF |
549 | return 0; |
550 | } | |
551 | ||
17347053 | 552 | int sd_radv_set_managed_information(sd_radv *ra, int managed) { |
204f99d2 PF |
553 | assert_return(ra, -EINVAL); |
554 | ||
d6fc0d67 | 555 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
556 | return -EBUSY; |
557 | ||
558 | SET_FLAG(ra->flags, ND_RA_FLAG_MANAGED, managed); | |
559 | ||
560 | return 0; | |
561 | } | |
562 | ||
17347053 | 563 | int sd_radv_set_other_information(sd_radv *ra, int other) { |
204f99d2 PF |
564 | assert_return(ra, -EINVAL); |
565 | ||
d6fc0d67 | 566 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
567 | return -EBUSY; |
568 | ||
569 | SET_FLAG(ra->flags, ND_RA_FLAG_OTHER, other); | |
570 | ||
571 | return 0; | |
572 | } | |
573 | ||
17347053 | 574 | int sd_radv_set_preference(sd_radv *ra, unsigned preference) { |
204f99d2 PF |
575 | assert_return(ra, -EINVAL); |
576 | assert_return(IN_SET(preference, | |
577 | SD_NDISC_PREFERENCE_LOW, | |
578 | SD_NDISC_PREFERENCE_MEDIUM, | |
579 | SD_NDISC_PREFERENCE_HIGH), -EINVAL); | |
580 | ||
dd1b1870 YW |
581 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
582 | * to (00) by the sender..." */ | |
7003b114 | 583 | if (ra->lifetime_usec == 0 && preference != SD_NDISC_PREFERENCE_MEDIUM) |
dd1b1870 YW |
584 | return -EINVAL; |
585 | ||
204f99d2 PF |
586 | ra->flags = (ra->flags & ~(0x3 << 3)) | (preference << 3); |
587 | ||
dd1b1870 | 588 | return 0; |
204f99d2 PF |
589 | } |
590 | ||
6a6d27bc SS |
591 | int sd_radv_set_home_agent_information(sd_radv *ra, int home_agent) { |
592 | assert_return(ra, -EINVAL); | |
593 | ||
594 | if (ra->state != RADV_STATE_IDLE) | |
595 | return -EBUSY; | |
596 | ||
597 | SET_FLAG(ra->flags, ND_RA_FLAG_HOME_AGENT, home_agent); | |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
602 | int sd_radv_set_home_agent_preference(sd_radv *ra, uint16_t preference) { | |
603 | assert_return(ra, -EINVAL); | |
604 | ||
605 | if (ra->state != RADV_STATE_IDLE) | |
606 | return -EBUSY; | |
607 | ||
608 | ra->home_agent.nd_opt_home_agent_info_preference = htobe16(preference); | |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
eca280c8 | 613 | int sd_radv_set_home_agent_lifetime(sd_radv *ra, uint64_t lifetime_usec) { |
6a6d27bc SS |
614 | assert_return(ra, -EINVAL); |
615 | ||
616 | if (ra->state != RADV_STATE_IDLE) | |
617 | return -EBUSY; | |
618 | ||
eca280c8 YW |
619 | if (lifetime_usec > RADV_HOME_AGENT_MAX_LIFETIME_USEC) |
620 | return -EINVAL; | |
6a6d27bc | 621 | |
eca280c8 | 622 | ra->home_agent.nd_opt_home_agent_info_lifetime = usec_to_be16_sec(lifetime_usec); |
6a6d27bc SS |
623 | return 0; |
624 | } | |
625 | ||
17347053 | 626 | int sd_radv_add_prefix(sd_radv *ra, sd_radv_prefix *p) { |
03677889 | 627 | sd_radv_prefix *found = NULL; |
d601b566 | 628 | int r; |
204f99d2 PF |
629 | |
630 | assert_return(ra, -EINVAL); | |
acbb5500 | 631 | assert_return(p, -EINVAL); |
204f99d2 | 632 | |
59ea6e57 | 633 | /* Refuse prefixes that don't have a prefix set */ |
94876904 | 634 | if (in6_addr_is_null(&p->opt.in6_addr)) |
59ea6e57 LP |
635 | return -ENOEXEC; |
636 | ||
c71384a9 | 637 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
5380707a | 638 | |
204f99d2 | 639 | LIST_FOREACH(prefix, cur, ra->prefixes) { |
204f99d2 | 640 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 641 | (const union in_addr_union*) &cur->opt.in6_addr, |
204f99d2 | 642 | cur->opt.prefixlen, |
c633628d | 643 | (const union in_addr_union*) &p->opt.in6_addr, |
204f99d2 | 644 | p->opt.prefixlen); |
5380707a YW |
645 | if (r < 0) |
646 | return r; | |
647 | if (r == 0) | |
648 | continue; | |
204f99d2 | 649 | |
95e104e0 | 650 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 651 | found = cur; |
b9f27a05 | 652 | break; |
95e104e0 | 653 | } |
d601b566 | 654 | |
35388783 | 655 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 656 | "IPv6 prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
657 | addr_p, |
658 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
204f99d2 PF |
659 | } |
660 | ||
56aa5143 | 661 | if (found) { |
b9f27a05 YW |
662 | /* p and cur may be equivalent. First increment the reference counter. */ |
663 | sd_radv_prefix_ref(p); | |
664 | ||
665 | /* Then, remove the old entry. */ | |
56aa5143 YW |
666 | LIST_REMOVE(prefix, ra->prefixes, found); |
667 | sd_radv_prefix_unref(found); | |
b9f27a05 YW |
668 | |
669 | /* Finally, add the new entry. */ | |
670 | LIST_APPEND(prefix, ra->prefixes, p); | |
671 | ||
672 | log_radv(ra, "Updated/replaced IPv6 prefix %s (preferred: %s, valid: %s)", | |
c71384a9 | 673 | addr_p, |
b9f27a05 YW |
674 | FORMAT_TIMESPAN(p->lifetime_preferred_usec, USEC_PER_SEC), |
675 | FORMAT_TIMESPAN(p->lifetime_valid_usec, USEC_PER_SEC)); | |
676 | } else { | |
677 | /* The prefix is new. Let's simply add it. */ | |
678 | ||
679 | sd_radv_prefix_ref(p); | |
680 | LIST_APPEND(prefix, ra->prefixes, p); | |
681 | ra->n_prefixes++; | |
204f99d2 | 682 | |
c71384a9 | 683 | log_radv(ra, "Added prefix %s", addr_p); |
b9f27a05 | 684 | } |
059d7b6e YW |
685 | |
686 | if (ra->state == RADV_STATE_IDLE) | |
687 | return 0; | |
688 | ||
059d7b6e | 689 | if (ra->ra_sent == 0) |
d601b566 | 690 | return 0; |
d601b566 | 691 | |
97efde65 | 692 | /* If RAs have already been sent, send an RA immediately to announce the newly-added prefix */ |
36653443 | 693 | r = radv_send_router(ra, NULL, ra->lifetime_usec); |
059d7b6e | 694 | if (r < 0) |
abb977a6 | 695 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added prefix %s, ignoring: %m", addr_p); |
059d7b6e | 696 | else |
c71384a9 | 697 | log_radv(ra, "Sent Router Advertisement for added/updated prefix %s.", addr_p); |
97efde65 | 698 | |
204f99d2 PF |
699 | return 0; |
700 | } | |
701 | ||
95931532 YW |
702 | void sd_radv_remove_prefix( |
703 | sd_radv *ra, | |
704 | const struct in6_addr *prefix, | |
705 | unsigned char prefixlen) { | |
34c169c4 | 706 | |
95931532 YW |
707 | if (!ra) |
708 | return; | |
34c169c4 | 709 | |
95931532 YW |
710 | if (!prefix) |
711 | return; | |
712 | ||
713 | LIST_FOREACH(prefix, cur, ra->prefixes) { | |
34c169c4 PF |
714 | if (prefixlen != cur->opt.prefixlen) |
715 | continue; | |
716 | ||
94876904 | 717 | if (!in6_addr_equal(prefix, &cur->opt.in6_addr)) |
34c169c4 PF |
718 | continue; |
719 | ||
720 | LIST_REMOVE(prefix, ra->prefixes, cur); | |
721 | ra->n_prefixes--; | |
62bbbedf | 722 | sd_radv_prefix_unref(cur); |
95931532 | 723 | return; |
34c169c4 | 724 | } |
34c169c4 PF |
725 | } |
726 | ||
17347053 | 727 | int sd_radv_add_route_prefix(sd_radv *ra, sd_radv_route_prefix *p) { |
03677889 | 728 | sd_radv_route_prefix *found = NULL; |
203d4df5 SS |
729 | int r; |
730 | ||
731 | assert_return(ra, -EINVAL); | |
acbb5500 | 732 | assert_return(p, -EINVAL); |
203d4df5 | 733 | |
c71384a9 | 734 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
203d4df5 SS |
735 | |
736 | LIST_FOREACH(prefix, cur, ra->route_prefixes) { | |
203d4df5 | 737 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 738 | (const union in_addr_union*) &cur->opt.in6_addr, |
203d4df5 | 739 | cur->opt.prefixlen, |
c633628d | 740 | (const union in_addr_union*) &p->opt.in6_addr, |
203d4df5 SS |
741 | p->opt.prefixlen); |
742 | if (r < 0) | |
743 | return r; | |
744 | if (r == 0) | |
745 | continue; | |
746 | ||
95e104e0 | 747 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 748 | found = cur; |
b9f27a05 | 749 | break; |
95e104e0 | 750 | } |
203d4df5 | 751 | |
35388783 | 752 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 753 | "IPv6 route prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
754 | addr_p, |
755 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
203d4df5 SS |
756 | } |
757 | ||
56aa5143 | 758 | if (found) { |
b9f27a05 YW |
759 | /* p and cur may be equivalent. First increment the reference counter. */ |
760 | sd_radv_route_prefix_ref(p); | |
761 | ||
762 | /* Then, remove the old entry. */ | |
56aa5143 YW |
763 | LIST_REMOVE(prefix, ra->route_prefixes, found); |
764 | sd_radv_route_prefix_unref(found); | |
b9f27a05 YW |
765 | |
766 | /* Finally, add the new entry. */ | |
767 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
768 | ||
769 | log_radv(ra, "Updated/replaced IPv6 route prefix %s (lifetime: %s)", | |
770 | strna(addr_p), | |
771 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
772 | } else { | |
773 | /* The route prefix is new. Let's simply add it. */ | |
774 | ||
775 | sd_radv_route_prefix_ref(p); | |
776 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
777 | ra->n_route_prefixes++; | |
778 | ||
779 | log_radv(ra, "Added route prefix %s", strna(addr_p)); | |
780 | } | |
059d7b6e YW |
781 | |
782 | if (ra->state == RADV_STATE_IDLE) | |
783 | return 0; | |
784 | ||
059d7b6e | 785 | if (ra->ra_sent == 0) |
203d4df5 | 786 | return 0; |
203d4df5 | 787 | |
97efde65 | 788 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ |
36653443 | 789 | r = radv_send_router(ra, NULL, ra->lifetime_usec); |
059d7b6e | 790 | if (r < 0) |
abb977a6 | 791 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added route prefix %s, ignoring: %m", |
b9f27a05 | 792 | strna(addr_p)); |
059d7b6e | 793 | else |
b9f27a05 | 794 | log_radv(ra, "Sent Router Advertisement for added route prefix %s.", strna(addr_p)); |
97efde65 | 795 | |
203d4df5 SS |
796 | return 0; |
797 | } | |
798 | ||
1925f829 SS |
799 | int sd_radv_add_pref64_prefix(sd_radv *ra, sd_radv_pref64_prefix *p) { |
800 | sd_radv_pref64_prefix *found = NULL; | |
801 | int r; | |
802 | ||
803 | assert_return(ra, -EINVAL); | |
804 | assert_return(p, -EINVAL); | |
805 | ||
806 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->in6_addr, p->prefixlen); | |
807 | ||
808 | LIST_FOREACH(prefix, cur, ra->pref64_prefixes) { | |
809 | r = in_addr_prefix_intersect(AF_INET6, | |
810 | (const union in_addr_union*) &cur->in6_addr, | |
811 | cur->prefixlen, | |
812 | (const union in_addr_union*) &p->in6_addr, | |
813 | p->prefixlen); | |
814 | if (r < 0) | |
815 | return r; | |
816 | if (r == 0) | |
817 | continue; | |
818 | ||
819 | if (cur->prefixlen == p->prefixlen) { | |
820 | found = cur; | |
821 | break; | |
822 | } | |
823 | ||
824 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), | |
825 | "IPv6 PREF64 prefix %s conflicts with %s, ignoring.", | |
826 | addr_p, | |
827 | IN6_ADDR_PREFIX_TO_STRING(&cur->in6_addr, cur->prefixlen)); | |
828 | } | |
829 | ||
830 | if (found) { | |
831 | /* p and cur may be equivalent. First increment the reference counter. */ | |
832 | sd_radv_pref64_prefix_ref(p); | |
833 | ||
834 | /* Then, remove the old entry. */ | |
835 | LIST_REMOVE(prefix, ra->pref64_prefixes, found); | |
836 | sd_radv_pref64_prefix_unref(found); | |
837 | ||
838 | /* Finally, add the new entry. */ | |
839 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
840 | ||
841 | log_radv(ra, "Updated/replaced IPv6 PREF64 prefix %s (lifetime: %s)", | |
842 | strna(addr_p), | |
843 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
844 | } else { | |
845 | /* The route prefix is new. Let's simply add it. */ | |
846 | ||
847 | sd_radv_pref64_prefix_ref(p); | |
848 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
849 | ra->n_pref64_prefixes++; | |
850 | ||
851 | log_radv(ra, "Added PREF64 prefix %s", strna(addr_p)); | |
852 | } | |
853 | ||
854 | if (ra->state == RADV_STATE_IDLE) | |
855 | return 0; | |
856 | ||
857 | if (ra->ra_sent == 0) | |
858 | return 0; | |
859 | ||
860 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ | |
36653443 | 861 | r = radv_send_router(ra, NULL, ra->lifetime_usec); |
1925f829 SS |
862 | if (r < 0) |
863 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added PREF64 prefix %s, ignoring: %m", | |
864 | strna(addr_p)); | |
865 | else | |
866 | log_radv(ra, "Sent Router Advertisement for added PREF64 prefix %s.", strna(addr_p)); | |
867 | ||
868 | return 0; | |
869 | } | |
870 | ||
faaf3d66 YW |
871 | int sd_radv_set_rdnss( |
872 | sd_radv *ra, | |
eca280c8 | 873 | uint64_t lifetime_usec, |
faaf3d66 YW |
874 | const struct in6_addr *dns, |
875 | size_t n_dns) { | |
876 | ||
e9c6da38 PF |
877 | _cleanup_free_ struct sd_radv_opt_dns *opt_rdnss = NULL; |
878 | size_t len; | |
879 | ||
880 | assert_return(ra, -EINVAL); | |
881 | assert_return(n_dns < 128, -EINVAL); | |
882 | ||
eca280c8 YW |
883 | if (lifetime_usec > RADV_RDNSS_MAX_LIFETIME_USEC) |
884 | return -EINVAL; | |
885 | ||
e9c6da38 PF |
886 | if (!dns || n_dns == 0) { |
887 | ra->rdnss = mfree(ra->rdnss); | |
888 | ra->n_rdnss = 0; | |
889 | ||
890 | return 0; | |
891 | } | |
892 | ||
893 | len = sizeof(struct sd_radv_opt_dns) + sizeof(struct in6_addr) * n_dns; | |
894 | ||
895 | opt_rdnss = malloc0(len); | |
896 | if (!opt_rdnss) | |
897 | return -ENOMEM; | |
898 | ||
d6fc0d67 | 899 | opt_rdnss->type = RADV_OPT_RDNSS; |
e9c6da38 | 900 | opt_rdnss->length = len / 8; |
eca280c8 | 901 | opt_rdnss->lifetime = usec_to_be32_sec(lifetime_usec); |
e9c6da38 PF |
902 | |
903 | memcpy(opt_rdnss + 1, dns, n_dns * sizeof(struct in6_addr)); | |
904 | ||
1cc6c93a | 905 | free_and_replace(ra->rdnss, opt_rdnss); |
e9c6da38 PF |
906 | |
907 | ra->n_rdnss = n_dns; | |
908 | ||
909 | return 0; | |
910 | } | |
911 | ||
faaf3d66 YW |
912 | int sd_radv_set_dnssl( |
913 | sd_radv *ra, | |
eca280c8 | 914 | uint64_t lifetime_usec, |
faaf3d66 YW |
915 | char **search_list) { |
916 | ||
e965d6ab PF |
917 | _cleanup_free_ struct sd_radv_opt_dns *opt_dnssl = NULL; |
918 | size_t len = 0; | |
e965d6ab PF |
919 | uint8_t *p; |
920 | ||
921 | assert_return(ra, -EINVAL); | |
922 | ||
eca280c8 YW |
923 | if (lifetime_usec > RADV_DNSSL_MAX_LIFETIME_USEC) |
924 | return -EINVAL; | |
925 | ||
97d7974b | 926 | if (strv_isempty(search_list)) { |
e965d6ab | 927 | ra->dnssl = mfree(ra->dnssl); |
e965d6ab PF |
928 | return 0; |
929 | } | |
930 | ||
931 | STRV_FOREACH(s, search_list) | |
932 | len += strlen(*s) + 2; | |
933 | ||
934 | len = (sizeof(struct sd_radv_opt_dns) + len + 7) & ~0x7; | |
935 | ||
936 | opt_dnssl = malloc0(len); | |
937 | if (!opt_dnssl) | |
938 | return -ENOMEM; | |
939 | ||
d6fc0d67 | 940 | opt_dnssl->type = RADV_OPT_DNSSL; |
e965d6ab | 941 | opt_dnssl->length = len / 8; |
eca280c8 | 942 | opt_dnssl->lifetime = usec_to_be32_sec(lifetime_usec); |
e965d6ab PF |
943 | |
944 | p = (uint8_t *)(opt_dnssl + 1); | |
945 | len -= sizeof(struct sd_radv_opt_dns); | |
946 | ||
947 | STRV_FOREACH(s, search_list) { | |
948 | int r; | |
949 | ||
950 | r = dns_name_to_wire_format(*s, p, len, false); | |
951 | if (r < 0) | |
952 | return r; | |
953 | ||
954 | if (len < (size_t)r) | |
955 | return -ENOBUFS; | |
956 | ||
957 | p += r; | |
958 | len -= r; | |
959 | } | |
960 | ||
1cc6c93a | 961 | free_and_replace(ra->dnssl, opt_dnssl); |
e965d6ab PF |
962 | |
963 | return 0; | |
964 | } | |
965 | ||
17347053 | 966 | int sd_radv_prefix_new(sd_radv_prefix **ret) { |
d2c8eed2 | 967 | sd_radv_prefix *p; |
04473969 PF |
968 | |
969 | assert_return(ret, -EINVAL); | |
970 | ||
d2c8eed2 | 971 | p = new(sd_radv_prefix, 1); |
04473969 PF |
972 | if (!p) |
973 | return -ENOMEM; | |
974 | ||
d2c8eed2 LP |
975 | *p = (sd_radv_prefix) { |
976 | .n_ref = 1, | |
04473969 | 977 | |
d2c8eed2 LP |
978 | .opt.type = ND_OPT_PREFIX_INFORMATION, |
979 | .opt.length = (sizeof(p->opt) - 1)/8 + 1, | |
980 | .opt.prefixlen = 64, | |
04473969 | 981 | |
d2c8eed2 LP |
982 | /* RFC 4861, Section 6.2.1 */ |
983 | .opt.flags = ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO, | |
204f99d2 | 984 | |
d951507d YW |
985 | .lifetime_valid_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
986 | .lifetime_preferred_usec = RADV_DEFAULT_PREFERRED_LIFETIME_USEC, | |
95e104e0 YW |
987 | .valid_until = USEC_INFINITY, |
988 | .preferred_until = USEC_INFINITY, | |
d2c8eed2 | 989 | }; |
04473969 | 990 | |
d2c8eed2 | 991 | *ret = p; |
04473969 PF |
992 | return 0; |
993 | } | |
994 | ||
8301aa0b | 995 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_prefix, sd_radv_prefix, mfree); |
04473969 | 996 | |
faaf3d66 YW |
997 | int sd_radv_prefix_set_prefix( |
998 | sd_radv_prefix *p, | |
999 | const struct in6_addr *in6_addr, | |
1000 | unsigned char prefixlen) { | |
1001 | ||
04473969 PF |
1002 | assert_return(p, -EINVAL); |
1003 | assert_return(in6_addr, -EINVAL); | |
1004 | ||
1005 | if (prefixlen < 3 || prefixlen > 128) | |
1006 | return -EINVAL; | |
1007 | ||
1008 | if (prefixlen > 64) | |
1009 | /* unusual but allowed, log it */ | |
35388783 | 1010 | log_radv(NULL, "Unusual prefix length %d greater than 64", prefixlen); |
04473969 PF |
1011 | |
1012 | p->opt.in6_addr = *in6_addr; | |
1013 | p->opt.prefixlen = prefixlen; | |
1014 | ||
1015 | return 0; | |
1016 | } | |
1017 | ||
faaf3d66 YW |
1018 | int sd_radv_prefix_get_prefix( |
1019 | sd_radv_prefix *p, | |
1020 | struct in6_addr *ret_in6_addr, | |
1021 | unsigned char *ret_prefixlen) { | |
1022 | ||
34332af2 SS |
1023 | assert_return(p, -EINVAL); |
1024 | assert_return(ret_in6_addr, -EINVAL); | |
1025 | assert_return(ret_prefixlen, -EINVAL); | |
1026 | ||
1027 | *ret_in6_addr = p->opt.in6_addr; | |
1028 | *ret_prefixlen = p->opt.prefixlen; | |
1029 | ||
1030 | return 0; | |
1031 | } | |
1032 | ||
17347053 | 1033 | int sd_radv_prefix_set_onlink(sd_radv_prefix *p, int onlink) { |
04473969 PF |
1034 | assert_return(p, -EINVAL); |
1035 | ||
1036 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, onlink); | |
1037 | ||
1038 | return 0; | |
1039 | } | |
1040 | ||
faaf3d66 | 1041 | int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix *p, int address_autoconfiguration) { |
04473969 PF |
1042 | assert_return(p, -EINVAL); |
1043 | ||
1044 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, address_autoconfiguration); | |
1045 | ||
1046 | return 0; | |
1047 | } | |
1048 | ||
17347053 | 1049 | int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
1050 | assert_return(p, -EINVAL); |
1051 | ||
95e104e0 YW |
1052 | p->lifetime_valid_usec = lifetime_usec; |
1053 | p->valid_until = valid_until; | |
04473969 PF |
1054 | |
1055 | return 0; | |
1056 | } | |
1057 | ||
17347053 | 1058 | int sd_radv_prefix_set_preferred_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
1059 | assert_return(p, -EINVAL); |
1060 | ||
95e104e0 YW |
1061 | p->lifetime_preferred_usec = lifetime_usec; |
1062 | p->preferred_until = valid_until; | |
04473969 PF |
1063 | |
1064 | return 0; | |
1065 | } | |
203d4df5 | 1066 | |
17347053 | 1067 | int sd_radv_route_prefix_new(sd_radv_route_prefix **ret) { |
203d4df5 SS |
1068 | sd_radv_route_prefix *p; |
1069 | ||
1070 | assert_return(ret, -EINVAL); | |
1071 | ||
1072 | p = new(sd_radv_route_prefix, 1); | |
1073 | if (!p) | |
1074 | return -ENOMEM; | |
1075 | ||
1076 | *p = (sd_radv_route_prefix) { | |
1077 | .n_ref = 1, | |
1078 | ||
d6fc0d67 | 1079 | .opt.type = RADV_OPT_ROUTE_INFORMATION, |
203d4df5 SS |
1080 | .opt.length = DIV_ROUND_UP(sizeof(p->opt), 8), |
1081 | .opt.prefixlen = 64, | |
1082 | ||
d951507d | 1083 | .lifetime_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
95e104e0 | 1084 | .valid_until = USEC_INFINITY, |
203d4df5 SS |
1085 | }; |
1086 | ||
1087 | *ret = p; | |
1088 | return 0; | |
1089 | } | |
1090 | ||
1091 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_route_prefix, sd_radv_route_prefix, mfree); | |
1092 | ||
faaf3d66 YW |
1093 | int sd_radv_route_prefix_set_prefix( |
1094 | sd_radv_route_prefix *p, | |
1095 | const struct in6_addr *in6_addr, | |
1096 | unsigned char prefixlen) { | |
1097 | ||
203d4df5 SS |
1098 | assert_return(p, -EINVAL); |
1099 | assert_return(in6_addr, -EINVAL); | |
1100 | ||
1101 | if (prefixlen > 128) | |
1102 | return -EINVAL; | |
1103 | ||
1104 | if (prefixlen > 64) | |
1105 | /* unusual but allowed, log it */ | |
35388783 | 1106 | log_radv(NULL, "Unusual prefix length %u greater than 64", prefixlen); |
203d4df5 SS |
1107 | |
1108 | p->opt.in6_addr = *in6_addr; | |
1109 | p->opt.prefixlen = prefixlen; | |
1110 | ||
1111 | return 0; | |
1112 | } | |
1113 | ||
17347053 | 1114 | int sd_radv_route_prefix_set_lifetime(sd_radv_route_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
203d4df5 SS |
1115 | assert_return(p, -EINVAL); |
1116 | ||
95e104e0 YW |
1117 | p->lifetime_usec = lifetime_usec; |
1118 | p->valid_until = valid_until; | |
203d4df5 SS |
1119 | |
1120 | return 0; | |
1121 | } | |
1925f829 SS |
1122 | |
1123 | int sd_radv_pref64_prefix_new(sd_radv_pref64_prefix **ret) { | |
1124 | sd_radv_pref64_prefix *p; | |
1125 | ||
1126 | assert_return(ret, -EINVAL); | |
1127 | ||
1128 | p = new(sd_radv_pref64_prefix, 1); | |
1129 | if (!p) | |
1130 | return -ENOMEM; | |
1131 | ||
1132 | *p = (sd_radv_pref64_prefix) { | |
1133 | .n_ref = 1, | |
1134 | ||
1135 | .opt.type = RADV_OPT_PREF64, | |
1136 | .opt.length = 2, | |
1137 | }; | |
1138 | ||
1139 | *ret = p; | |
1140 | return 0; | |
1141 | } | |
1142 | ||
1143 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_pref64_prefix, sd_radv_pref64_prefix, mfree); | |
1144 | ||
1145 | int sd_radv_pref64_prefix_set_prefix( | |
1146 | sd_radv_pref64_prefix *p, | |
1147 | const struct in6_addr *prefix, | |
1148 | uint8_t prefixlen, | |
1149 | uint64_t lifetime_usec) { | |
1150 | ||
1151 | uint16_t pref64_lifetime; | |
1152 | uint8_t prefixlen_code; | |
6e8f5e4c | 1153 | int r; |
1925f829 SS |
1154 | |
1155 | assert_return(p, -EINVAL); | |
1156 | assert_return(prefix, -EINVAL); | |
1157 | ||
6e8f5e4c SS |
1158 | r = pref64_prefix_length_to_plc(prefixlen, &prefixlen_code); |
1159 | if (r < 0) | |
f31fa080 ZJS |
1160 | return log_radv_errno(NULL, r, |
1161 | "Unsupported PREF64 prefix length %u. Valid lengths are 32, 40, 48, 56, 64 and 96", prefixlen); | |
1925f829 | 1162 | |
eca280c8 | 1163 | if (lifetime_usec > PREF64_MAX_LIFETIME_USEC) |
1925f829 SS |
1164 | return -EINVAL; |
1165 | ||
1166 | /* RFC 8781 - 4.1 rounding up lifetime to multiply of 8 */ | |
1167 | pref64_lifetime = DIV_ROUND_UP(lifetime_usec, 8 * USEC_PER_SEC) << 3; | |
1168 | pref64_lifetime |= prefixlen_code; | |
1169 | ||
1170 | unaligned_write_be16(&p->opt.lifetime_and_plc, pref64_lifetime); | |
1171 | memcpy(&p->opt.prefix, prefix, sizeof(p->opt.prefix)); | |
1172 | ||
1173 | p->in6_addr = *prefix; | |
1174 | p->prefixlen = prefixlen; | |
1175 | ||
1176 | return 0; | |
1177 | } |