]>
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" | |
bd1ae178 | 19 | #include "iovec-util.h" |
5cfa2c3d | 20 | #include "macro.h" |
0a970718 | 21 | #include "memory-util.h" |
cc2bcbf6 | 22 | #include "ndisc-router-solicit-internal.h" |
61a9fa8f | 23 | #include "network-common.h" |
04473969 | 24 | #include "radv-internal.h" |
5cfa2c3d | 25 | #include "random-util.h" |
04473969 PF |
26 | #include "socket-util.h" |
27 | #include "string-util.h" | |
e965d6ab | 28 | #include "strv.h" |
1925f829 | 29 | #include "unaligned.h" |
04473969 | 30 | |
17347053 | 31 | int sd_radv_new(sd_radv **ret) { |
204f99d2 PF |
32 | _cleanup_(sd_radv_unrefp) sd_radv *ra = NULL; |
33 | ||
34 | assert_return(ret, -EINVAL); | |
35 | ||
78f9d24f | 36 | ra = new(sd_radv, 1); |
204f99d2 PF |
37 | if (!ra) |
38 | return -ENOMEM; | |
39 | ||
78f9d24f YW |
40 | *ra = (sd_radv) { |
41 | .n_ref = 1, | |
254d1313 | 42 | .fd = -EBADF, |
72db0a71 | 43 | .lifetime_usec = RADV_DEFAULT_ROUTER_LIFETIME_USEC, |
78f9d24f | 44 | }; |
204f99d2 | 45 | |
1cc6c93a | 46 | *ret = TAKE_PTR(ra); |
204f99d2 PF |
47 | |
48 | return 0; | |
49 | } | |
50 | ||
17347053 | 51 | int sd_radv_attach_event(sd_radv *ra, sd_event *event, int64_t priority) { |
204f99d2 PF |
52 | int r; |
53 | ||
54 | assert_return(ra, -EINVAL); | |
55 | assert_return(!ra->event, -EBUSY); | |
56 | ||
57 | if (event) | |
58 | ra->event = sd_event_ref(event); | |
59 | else { | |
60 | r = sd_event_default(&ra->event); | |
61 | if (r < 0) | |
62 | return 0; | |
63 | } | |
64 | ||
65 | ra->event_priority = priority; | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
17347053 | 70 | int sd_radv_detach_event(sd_radv *ra) { |
204f99d2 PF |
71 | |
72 | assert_return(ra, -EINVAL); | |
73 | ||
74 | ra->event = sd_event_unref(ra->event); | |
75 | return 0; | |
76 | } | |
77 | ||
17347053 | 78 | sd_event *sd_radv_get_event(sd_radv *ra) { |
204f99d2 PF |
79 | assert_return(ra, NULL); |
80 | ||
81 | return ra->event; | |
82 | } | |
83 | ||
17347053 | 84 | int sd_radv_is_running(sd_radv *ra) { |
8e91738f YW |
85 | if (!ra) |
86 | return false; | |
96fe813c | 87 | |
d6fc0d67 | 88 | return ra->state != RADV_STATE_IDLE; |
96fe813c YW |
89 | } |
90 | ||
204fb681 | 91 | static void radv_reset(sd_radv *ra) { |
c4b6dda0 | 92 | assert(ra); |
204fb681 | 93 | |
807a8ede | 94 | (void) event_source_disable(ra->timeout_event_source); |
204fb681 | 95 | |
eb2f7502 | 96 | ra->recv_event_source = sd_event_source_disable_unref(ra->recv_event_source); |
88d5a3db | 97 | |
204fb681 PF |
98 | ra->ra_sent = 0; |
99 | } | |
100 | ||
8301aa0b | 101 | static sd_radv *radv_free(sd_radv *ra) { |
e866e17b LP |
102 | if (!ra) |
103 | return NULL; | |
204f99d2 | 104 | |
9aad490e DT |
105 | LIST_CLEAR(prefix, ra->prefixes, sd_radv_prefix_unref); |
106 | LIST_CLEAR(prefix, ra->route_prefixes, sd_radv_route_prefix_unref); | |
1a6b1214 | 107 | LIST_CLEAR(prefix, ra->pref64_prefixes, sd_radv_pref64_prefix_unref); |
69d7eba1 | 108 | |
e9c6da38 | 109 | free(ra->rdnss); |
f9aa5417 | 110 | free(ra->dnssl); |
e9c6da38 | 111 | |
204fb681 PF |
112 | radv_reset(ra); |
113 | ||
eb2f7502 | 114 | sd_event_source_unref(ra->timeout_event_source); |
204f99d2 | 115 | sd_radv_detach_event(ra); |
c4b6dda0 LP |
116 | |
117 | ra->fd = safe_close(ra->fd); | |
61a9fa8f | 118 | free(ra->ifname); |
c4b6dda0 | 119 | |
204f99d2 PF |
120 | return mfree(ra); |
121 | } | |
122 | ||
8301aa0b YW |
123 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv, sd_radv, radv_free); |
124 | ||
09457670 | 125 | static bool router_lifetime_is_valid(usec_t lifetime_usec) { |
36653443 | 126 | assert_cc(RADV_MAX_ROUTER_LIFETIME_USEC <= UINT16_MAX * USEC_PER_SEC); |
09457670 YW |
127 | return lifetime_usec == 0 || |
128 | (lifetime_usec >= RADV_MIN_ROUTER_LIFETIME_USEC && | |
129 | lifetime_usec <= RADV_MAX_ROUTER_LIFETIME_USEC); | |
130 | } | |
131 | ||
36653443 YW |
132 | static int radv_send_router(sd_radv *ra, const struct in6_addr *dst, usec_t lifetime_usec) { |
133 | assert(ra); | |
134 | assert(router_lifetime_is_valid(lifetime_usec)); | |
135 | ||
77baf5ae PF |
136 | struct sockaddr_in6 dst_addr = { |
137 | .sin6_family = AF_INET6, | |
2c28eb02 | 138 | .sin6_addr = IN6_ADDR_ALL_NODES_MULTICAST, |
77baf5ae | 139 | }; |
36653443 YW |
140 | struct nd_router_advert adv = { |
141 | .nd_ra_type = ND_ROUTER_ADVERT, | |
142 | .nd_ra_router_lifetime = usec_to_be16_sec(lifetime_usec), | |
143 | .nd_ra_retransmit = usec_to_be32_msec(ra->retransmit_usec), | |
144 | }; | |
77baf5ae PF |
145 | struct { |
146 | struct nd_opt_hdr opthdr; | |
147 | struct ether_addr slladdr; | |
148 | } _packed_ opt_mac = { | |
149 | .opthdr = { | |
150 | .nd_opt_type = ND_OPT_SOURCE_LINKADDR, | |
36653443 | 151 | .nd_opt_len = DIV_ROUND_UP(sizeof(struct nd_opt_hdr) + sizeof(struct ether_addr), 8), |
77baf5ae | 152 | }, |
36653443 | 153 | .slladdr = ra->mac_addr, |
77baf5ae PF |
154 | }; |
155 | struct nd_opt_mtu opt_mtu = { | |
156 | .nd_opt_mtu_type = ND_OPT_MTU, | |
157 | .nd_opt_mtu_len = 1, | |
36653443 | 158 | .nd_opt_mtu_mtu = htobe32(ra->mtu), |
77baf5ae | 159 | }; |
ac63c8df YW |
160 | /* Reserve iov space for RA header, linkaddr, MTU, N prefixes, N routes, N pref64 prefixes, RDNSS, |
161 | * DNSSL, and home agent. */ | |
162 | struct iovec iov[6 + ra->n_prefixes + ra->n_route_prefixes + ra->n_pref64_prefixes]; | |
77baf5ae PF |
163 | struct msghdr msg = { |
164 | .msg_name = &dst_addr, | |
165 | .msg_namelen = sizeof(dst_addr), | |
166 | .msg_iov = iov, | |
167 | }; | |
d601b566 PF |
168 | usec_t time_now; |
169 | int r; | |
170 | ||
ba4e0427 | 171 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
d601b566 PF |
172 | if (r < 0) |
173 | return r; | |
77baf5ae | 174 | |
94876904 | 175 | if (dst && in6_addr_is_set(dst)) |
77baf5ae | 176 | dst_addr.sin6_addr = *dst; |
88d5a3db | 177 | |
36653443 YW |
178 | /* The nd_ra_curhoplimit and nd_ra_flags_reserved fields cannot specified with nd_ra_router_lifetime |
179 | * simultaneously in the structured initializer in the above. */ | |
77baf5ae PF |
180 | adv.nd_ra_curhoplimit = ra->hop_limit; |
181 | adv.nd_ra_flags_reserved = ra->flags; | |
5cfa2c3d | 182 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&adv, sizeof(adv)); |
77baf5ae | 183 | |
36653443 YW |
184 | /* MAC address is optional, either because the link does not use L2 addresses or load sharing is |
185 | * desired. See RFC 4861, Section 4.2. */ | |
186 | if (!ether_addr_is_null(&ra->mac_addr)) | |
5cfa2c3d | 187 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mac, sizeof(opt_mac)); |
77baf5ae | 188 | |
36653443 | 189 | if (ra->mtu > 0) |
5cfa2c3d | 190 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mtu, sizeof(opt_mtu)); |
77baf5ae PF |
191 | |
192 | LIST_FOREACH(prefix, p, ra->prefixes) { | |
95e104e0 | 193 | usec_t lifetime_valid_usec, lifetime_preferred_usec; |
d601b566 | 194 | |
95e104e0 YW |
195 | lifetime_valid_usec = MIN(usec_sub_unsigned(p->valid_until, time_now), |
196 | p->lifetime_valid_usec); | |
197 | ||
198 | lifetime_preferred_usec = MIN3(usec_sub_unsigned(p->preferred_until, time_now), | |
199 | p->lifetime_preferred_usec, | |
200 | lifetime_valid_usec); | |
201 | ||
202 | p->opt.lifetime_valid = usec_to_be32_sec(lifetime_valid_usec); | |
203 | p->opt.lifetime_preferred = usec_to_be32_sec(lifetime_preferred_usec); | |
d601b566 | 204 | |
5cfa2c3d | 205 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&p->opt, sizeof(p->opt)); |
77baf5ae PF |
206 | } |
207 | ||
95e104e0 YW |
208 | LIST_FOREACH(prefix, rt, ra->route_prefixes) { |
209 | rt->opt.lifetime = usec_to_be32_sec(MIN(usec_sub_unsigned(rt->valid_until, time_now), | |
210 | rt->lifetime_usec)); | |
211 | ||
203d4df5 | 212 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&rt->opt, sizeof(rt->opt)); |
95e104e0 | 213 | } |
203d4df5 | 214 | |
1925f829 SS |
215 | LIST_FOREACH(prefix, p, ra->pref64_prefixes) |
216 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&p->opt, sizeof(p->opt)); | |
217 | ||
5cfa2c3d LP |
218 | if (ra->rdnss) |
219 | iov[msg.msg_iovlen++] = IOVEC_MAKE(ra->rdnss, ra->rdnss->length * 8); | |
e9c6da38 | 220 | |
5cfa2c3d LP |
221 | if (ra->dnssl) |
222 | iov[msg.msg_iovlen++] = IOVEC_MAKE(ra->dnssl, ra->dnssl->length * 8); | |
e965d6ab | 223 | |
6a6d27bc SS |
224 | if (FLAGS_SET(ra->flags, ND_RA_FLAG_HOME_AGENT)) { |
225 | ra->home_agent.nd_opt_home_agent_info_type = ND_OPT_HOME_AGENT_INFO; | |
226 | ra->home_agent.nd_opt_home_agent_info_len = 1; | |
227 | ||
228 | /* 0 means to place the current Router Lifetime value */ | |
229 | if (ra->home_agent.nd_opt_home_agent_info_lifetime == 0) | |
230 | ra->home_agent.nd_opt_home_agent_info_lifetime = adv.nd_ra_router_lifetime; | |
231 | ||
232 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&ra->home_agent, sizeof(ra->home_agent)); | |
233 | } | |
234 | ||
77baf5ae PF |
235 | if (sendmsg(ra->fd, &msg, 0) < 0) |
236 | return -errno; | |
204fb681 | 237 | |
77baf5ae | 238 | return 0; |
204fb681 PF |
239 | } |
240 | ||
cc2bcbf6 | 241 | static int radv_process_packet(sd_radv *ra, ICMP6Packet *packet) { |
88d5a3db | 242 | int r; |
88d5a3db | 243 | |
cc2bcbf6 YW |
244 | assert(ra); |
245 | assert(packet); | |
88d5a3db | 246 | |
cc2bcbf6 YW |
247 | if (icmp6_packet_get_type(packet) != ND_ROUTER_SOLICIT) |
248 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EBADMSG), "Received ICMP6 packet with unexpected type, ignoring."); | |
88d5a3db | 249 | |
cc2bcbf6 YW |
250 | _cleanup_(sd_ndisc_router_solicit_unrefp) sd_ndisc_router_solicit *rs = NULL; |
251 | rs = ndisc_router_solicit_new(packet); | |
252 | if (!rs) | |
253 | return log_oom_debug(); | |
88d5a3db | 254 | |
cc2bcbf6 | 255 | r = ndisc_router_solicit_parse(ra, rs); |
1f2db2e3 | 256 | if (r < 0) |
cc2bcbf6 | 257 | return r; |
88d5a3db | 258 | |
cc2bcbf6 YW |
259 | struct in6_addr src = {}; |
260 | r = sd_ndisc_router_solicit_get_sender_address(rs, &src); | |
261 | if (r < 0 && r != -ENODATA) /* null address is allowed */ | |
262 | return log_radv_errno(ra, r, "Failed to get sender address of RS, ignoring: %m"); | |
88d5a3db | 263 | |
cc2bcbf6 YW |
264 | r = radv_send_router(ra, &src, ra->lifetime_usec); |
265 | if (r < 0) | |
266 | return log_radv_errno(ra, r, "Unable to send solicited Router Advertisement to %s, ignoring: %m", IN6_ADDR_TO_STRING(&src)); | |
88d5a3db | 267 | |
cc2bcbf6 YW |
268 | log_radv(ra, "Sent solicited Router Advertisement to %s.", IN6_ADDR_TO_STRING(&src)); |
269 | return 0; | |
270 | } | |
88d5a3db | 271 | |
cc2bcbf6 YW |
272 | static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
273 | _cleanup_(icmp6_packet_unrefp) ICMP6Packet *packet = NULL; | |
274 | sd_radv *ra = ASSERT_PTR(userdata); | |
275 | int r; | |
cfffddea | 276 | |
cc2bcbf6 | 277 | assert(fd >= 0); |
4961f566 | 278 | |
cc2bcbf6 YW |
279 | r = icmp6_packet_receive(fd, &packet); |
280 | if (r < 0) { | |
281 | log_radv_errno(ra, r, "Failed to receive ICMPv6 packet, ignoring: %m"); | |
282 | return 0; | |
283 | } | |
88d5a3db | 284 | |
cc2bcbf6 | 285 | (void) radv_process_packet(ra, packet); |
88d5a3db PF |
286 | return 0; |
287 | } | |
288 | ||
204fb681 | 289 | static int radv_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
7003b114 | 290 | usec_t min_timeout, max_timeout, time_now, timeout; |
99534007 | 291 | sd_radv *ra = ASSERT_PTR(userdata); |
7003b114 | 292 | int r; |
204fb681 PF |
293 | |
294 | assert(s); | |
204fb681 | 295 | assert(ra->event); |
80477557 | 296 | assert(router_lifetime_is_valid(ra->lifetime_usec)); |
204fb681 | 297 | |
ba4e0427 | 298 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
204fb681 PF |
299 | if (r < 0) |
300 | goto fail; | |
301 | ||
36653443 | 302 | r = radv_send_router(ra, NULL, ra->lifetime_usec); |
204fb681 | 303 | if (r < 0) |
abb977a6 | 304 | log_radv_errno(ra, r, "Unable to send Router Advertisement, ignoring: %m"); |
204fb681 PF |
305 | |
306 | /* RFC 4861, Section 6.2.4, sending initial Router Advertisements */ | |
80477557 | 307 | if (ra->ra_sent < RADV_MAX_INITIAL_RTR_ADVERTISEMENTS) |
d6fc0d67 | 308 | max_timeout = RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC; |
80477557 | 309 | else |
03ec10fd | 310 | max_timeout = RADV_DEFAULT_MAX_TIMEOUT_USEC; |
204fb681 | 311 | |
ef90b6a4 | 312 | /* RFC 4861, Section 6.2.1, lifetime must be at least MaxRtrAdvInterval, |
80477557 YW |
313 | * so lower the interval here */ |
314 | if (ra->lifetime_usec > 0) | |
315 | max_timeout = MIN(max_timeout, ra->lifetime_usec); | |
316 | ||
317 | if (max_timeout >= 9 * USEC_PER_SEC) | |
ef90b6a4 | 318 | min_timeout = max_timeout / 3; |
80477557 YW |
319 | else |
320 | min_timeout = max_timeout * 3 / 4; | |
ef90b6a4 | 321 | |
80477557 YW |
322 | /* RFC 4861, Section 6.2.1. |
323 | * MaxRtrAdvInterval MUST be no less than 4 seconds and no greater than 1800 seconds. | |
324 | * MinRtrAdvInterval MUST be no less than 3 seconds and no greater than .75 * MaxRtrAdvInterval. */ | |
325 | assert(max_timeout >= RADV_MIN_MAX_TIMEOUT_USEC); | |
326 | assert(max_timeout <= RADV_MAX_MAX_TIMEOUT_USEC); | |
327 | assert(min_timeout >= RADV_MIN_MIN_TIMEOUT_USEC); | |
328 | assert(min_timeout <= max_timeout * 3 / 4); | |
ef90b6a4 | 329 | |
80477557 | 330 | timeout = min_timeout + random_u64_range(max_timeout - min_timeout); |
5291f26d | 331 | log_radv(ra, "Next Router Advertisement in %s", FORMAT_TIMESPAN(timeout, USEC_PER_SEC)); |
204fb681 | 332 | |
807a8ede | 333 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 334 | CLOCK_BOOTTIME, |
80477557 | 335 | usec_add(time_now, timeout), MSEC_PER_SEC, |
807a8ede YW |
336 | radv_timeout, ra, |
337 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
338 | if (r < 0) |
339 | goto fail; | |
340 | ||
341 | ra->ra_sent++; | |
342 | ||
807a8ede YW |
343 | return 0; |
344 | ||
204fb681 | 345 | fail: |
290696e5 | 346 | sd_radv_stop(ra); |
204fb681 PF |
347 | |
348 | return 0; | |
349 | } | |
350 | ||
17347053 | 351 | int sd_radv_stop(sd_radv *ra) { |
204fb681 PF |
352 | int r; |
353 | ||
c8bae363 YW |
354 | if (!ra) |
355 | return 0; | |
204f99d2 | 356 | |
d6fc0d67 | 357 | if (ra->state == RADV_STATE_IDLE) |
6f8a8b84 SS |
358 | return 0; |
359 | ||
35388783 | 360 | log_radv(ra, "Stopping IPv6 Router Advertisement daemon"); |
204f99d2 | 361 | |
36653443 YW |
362 | /* RFC 4861, Section 6.2.5: |
363 | * the router SHOULD transmit one or more (but not more than MAX_FINAL_RTR_ADVERTISEMENTS) final | |
364 | * multicast Router Advertisements on the interface with a Router Lifetime field of zero. */ | |
365 | r = radv_send_router(ra, NULL, 0); | |
290696e5 | 366 | if (r < 0) |
abb977a6 | 367 | log_radv_errno(ra, r, "Unable to send last Router Advertisement with router lifetime set to zero, ignoring: %m"); |
204fb681 PF |
368 | |
369 | radv_reset(ra); | |
77baf5ae | 370 | ra->fd = safe_close(ra->fd); |
d6fc0d67 | 371 | ra->state = RADV_STATE_IDLE; |
204f99d2 PF |
372 | |
373 | return 0; | |
374 | } | |
375 | ||
36653443 YW |
376 | static int radv_setup_recv_event(sd_radv *ra) { |
377 | int r; | |
378 | ||
379 | assert(ra); | |
380 | assert(ra->event); | |
381 | assert(ra->ifindex > 0); | |
382 | ||
383 | _cleanup_close_ int fd = -EBADF; | |
384 | fd = icmp6_bind(ra->ifindex, /* is_router = */ true); | |
385 | if (fd < 0) | |
386 | return fd; | |
387 | ||
388 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
389 | r = sd_event_add_io(ra->event, &s, fd, EPOLLIN, radv_recv, ra); | |
390 | if (r < 0) | |
391 | return r; | |
392 | ||
393 | r = sd_event_source_set_priority(s, ra->event_priority); | |
394 | if (r < 0) | |
395 | return r; | |
396 | ||
397 | (void) sd_event_source_set_description(s, "radv-receive-message"); | |
398 | ||
399 | ra->fd = TAKE_FD(fd); | |
400 | ra->recv_event_source = TAKE_PTR(s); | |
401 | return 0; | |
402 | } | |
403 | ||
17347053 | 404 | int sd_radv_start(sd_radv *ra) { |
f474884c | 405 | int r; |
204fb681 | 406 | |
204f99d2 PF |
407 | assert_return(ra, -EINVAL); |
408 | assert_return(ra->event, -EINVAL); | |
409 | assert_return(ra->ifindex > 0, -EINVAL); | |
410 | ||
d6fc0d67 | 411 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
412 | return 0; |
413 | ||
36653443 YW |
414 | r = radv_setup_recv_event(ra); |
415 | if (r < 0) | |
416 | goto fail; | |
417 | ||
807a8ede | 418 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 419 | CLOCK_BOOTTIME, |
807a8ede YW |
420 | 0, 0, |
421 | radv_timeout, ra, | |
422 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
423 | if (r < 0) |
424 | goto fail; | |
425 | ||
d6fc0d67 | 426 | ra->state = RADV_STATE_ADVERTISING; |
204f99d2 | 427 | |
35388783 | 428 | log_radv(ra, "Started IPv6 Router Advertisement daemon"); |
204f99d2 PF |
429 | |
430 | return 0; | |
204fb681 PF |
431 | |
432 | fail: | |
433 | radv_reset(ra); | |
434 | ||
435 | return r; | |
204f99d2 PF |
436 | } |
437 | ||
17347053 | 438 | int sd_radv_set_ifindex(sd_radv *ra, int ifindex) { |
204f99d2 | 439 | assert_return(ra, -EINVAL); |
7fa69c0a | 440 | assert_return(ifindex > 0, -EINVAL); |
204f99d2 | 441 | |
d6fc0d67 | 442 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
443 | return -EBUSY; |
444 | ||
445 | ra->ifindex = ifindex; | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
61a9fa8f YW |
450 | int sd_radv_set_ifname(sd_radv *ra, const char *ifname) { |
451 | assert_return(ra, -EINVAL); | |
452 | assert_return(ifname, -EINVAL); | |
453 | ||
454 | if (!ifname_valid_full(ifname, IFNAME_VALID_ALTERNATIVE)) | |
455 | return -EINVAL; | |
456 | ||
457 | return free_and_strdup(&ra->ifname, ifname); | |
458 | } | |
459 | ||
5977b71f YW |
460 | int sd_radv_get_ifname(sd_radv *ra, const char **ret) { |
461 | int r; | |
462 | ||
463 | assert_return(ra, -EINVAL); | |
61a9fa8f | 464 | |
5977b71f YW |
465 | r = get_ifname(ra->ifindex, &ra->ifname); |
466 | if (r < 0) | |
467 | return r; | |
468 | ||
469 | if (ret) | |
470 | *ret = ra->ifname; | |
471 | ||
472 | return 0; | |
61a9fa8f YW |
473 | } |
474 | ||
17347053 | 475 | int sd_radv_set_mac(sd_radv *ra, const struct ether_addr *mac_addr) { |
204f99d2 PF |
476 | assert_return(ra, -EINVAL); |
477 | ||
d6fc0d67 | 478 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
479 | return -EBUSY; |
480 | ||
481 | if (mac_addr) | |
482 | ra->mac_addr = *mac_addr; | |
483 | else | |
484 | zero(ra->mac_addr); | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
17347053 | 489 | int sd_radv_set_mtu(sd_radv *ra, uint32_t mtu) { |
204f99d2 PF |
490 | assert_return(ra, -EINVAL); |
491 | assert_return(mtu >= 1280, -EINVAL); | |
492 | ||
204f99d2 PF |
493 | ra->mtu = mtu; |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
17347053 | 498 | int sd_radv_set_hop_limit(sd_radv *ra, uint8_t hop_limit) { |
204f99d2 PF |
499 | assert_return(ra, -EINVAL); |
500 | ||
d6fc0d67 | 501 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
502 | return -EBUSY; |
503 | ||
504 | ra->hop_limit = hop_limit; | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
eca280c8 | 509 | int sd_radv_set_retransmit(sd_radv *ra, uint64_t usec) { |
fdc4c67c SS |
510 | assert_return(ra, -EINVAL); |
511 | ||
512 | if (ra->state != RADV_STATE_IDLE) | |
513 | return -EBUSY; | |
514 | ||
eca280c8 YW |
515 | if (usec > RADV_MAX_RETRANSMIT_USEC) |
516 | return -EINVAL; | |
fdc4c67c | 517 | |
eca280c8 | 518 | ra->retransmit_usec = usec; |
fdc4c67c SS |
519 | return 0; |
520 | } | |
521 | ||
eca280c8 | 522 | int sd_radv_set_router_lifetime(sd_radv *ra, uint64_t usec) { |
204f99d2 PF |
523 | assert_return(ra, -EINVAL); |
524 | ||
d6fc0d67 | 525 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
526 | return -EBUSY; |
527 | ||
eca280c8 | 528 | if (!router_lifetime_is_valid(usec)) |
09457670 YW |
529 | return -EINVAL; |
530 | ||
ac138551 YW |
531 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
532 | * to (00) by the sender..." */ | |
eca280c8 | 533 | if (usec == 0 && |
204f99d2 | 534 | (ra->flags & (0x3 << 3)) != (SD_NDISC_PREFERENCE_MEDIUM << 3)) |
09457670 | 535 | return -EINVAL; |
204f99d2 | 536 | |
eca280c8 | 537 | ra->lifetime_usec = usec; |
204f99d2 PF |
538 | return 0; |
539 | } | |
540 | ||
17347053 | 541 | int sd_radv_set_managed_information(sd_radv *ra, int managed) { |
204f99d2 PF |
542 | assert_return(ra, -EINVAL); |
543 | ||
d6fc0d67 | 544 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
545 | return -EBUSY; |
546 | ||
547 | SET_FLAG(ra->flags, ND_RA_FLAG_MANAGED, managed); | |
548 | ||
549 | return 0; | |
550 | } | |
551 | ||
17347053 | 552 | int sd_radv_set_other_information(sd_radv *ra, int other) { |
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_OTHER, other); | |
559 | ||
560 | return 0; | |
561 | } | |
562 | ||
17347053 | 563 | int sd_radv_set_preference(sd_radv *ra, unsigned preference) { |
204f99d2 PF |
564 | assert_return(ra, -EINVAL); |
565 | assert_return(IN_SET(preference, | |
566 | SD_NDISC_PREFERENCE_LOW, | |
567 | SD_NDISC_PREFERENCE_MEDIUM, | |
568 | SD_NDISC_PREFERENCE_HIGH), -EINVAL); | |
569 | ||
dd1b1870 YW |
570 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
571 | * to (00) by the sender..." */ | |
7003b114 | 572 | if (ra->lifetime_usec == 0 && preference != SD_NDISC_PREFERENCE_MEDIUM) |
dd1b1870 YW |
573 | return -EINVAL; |
574 | ||
204f99d2 PF |
575 | ra->flags = (ra->flags & ~(0x3 << 3)) | (preference << 3); |
576 | ||
dd1b1870 | 577 | return 0; |
204f99d2 PF |
578 | } |
579 | ||
6a6d27bc SS |
580 | int sd_radv_set_home_agent_information(sd_radv *ra, int home_agent) { |
581 | assert_return(ra, -EINVAL); | |
582 | ||
583 | if (ra->state != RADV_STATE_IDLE) | |
584 | return -EBUSY; | |
585 | ||
586 | SET_FLAG(ra->flags, ND_RA_FLAG_HOME_AGENT, home_agent); | |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
591 | int sd_radv_set_home_agent_preference(sd_radv *ra, uint16_t preference) { | |
592 | assert_return(ra, -EINVAL); | |
593 | ||
594 | if (ra->state != RADV_STATE_IDLE) | |
595 | return -EBUSY; | |
596 | ||
597 | ra->home_agent.nd_opt_home_agent_info_preference = htobe16(preference); | |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
eca280c8 | 602 | int sd_radv_set_home_agent_lifetime(sd_radv *ra, uint64_t lifetime_usec) { |
6a6d27bc SS |
603 | assert_return(ra, -EINVAL); |
604 | ||
605 | if (ra->state != RADV_STATE_IDLE) | |
606 | return -EBUSY; | |
607 | ||
eca280c8 YW |
608 | if (lifetime_usec > RADV_HOME_AGENT_MAX_LIFETIME_USEC) |
609 | return -EINVAL; | |
6a6d27bc | 610 | |
eca280c8 | 611 | ra->home_agent.nd_opt_home_agent_info_lifetime = usec_to_be16_sec(lifetime_usec); |
6a6d27bc SS |
612 | return 0; |
613 | } | |
614 | ||
17347053 | 615 | int sd_radv_add_prefix(sd_radv *ra, sd_radv_prefix *p) { |
03677889 | 616 | sd_radv_prefix *found = NULL; |
d601b566 | 617 | int r; |
204f99d2 PF |
618 | |
619 | assert_return(ra, -EINVAL); | |
acbb5500 | 620 | assert_return(p, -EINVAL); |
204f99d2 | 621 | |
59ea6e57 | 622 | /* Refuse prefixes that don't have a prefix set */ |
94876904 | 623 | if (in6_addr_is_null(&p->opt.in6_addr)) |
59ea6e57 LP |
624 | return -ENOEXEC; |
625 | ||
c71384a9 | 626 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
5380707a | 627 | |
204f99d2 | 628 | LIST_FOREACH(prefix, cur, ra->prefixes) { |
204f99d2 | 629 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 630 | (const union in_addr_union*) &cur->opt.in6_addr, |
204f99d2 | 631 | cur->opt.prefixlen, |
c633628d | 632 | (const union in_addr_union*) &p->opt.in6_addr, |
204f99d2 | 633 | p->opt.prefixlen); |
5380707a YW |
634 | if (r < 0) |
635 | return r; | |
636 | if (r == 0) | |
637 | continue; | |
204f99d2 | 638 | |
95e104e0 | 639 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 640 | found = cur; |
b9f27a05 | 641 | break; |
95e104e0 | 642 | } |
d601b566 | 643 | |
35388783 | 644 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 645 | "IPv6 prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
646 | addr_p, |
647 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
204f99d2 PF |
648 | } |
649 | ||
56aa5143 | 650 | if (found) { |
b9f27a05 YW |
651 | /* p and cur may be equivalent. First increment the reference counter. */ |
652 | sd_radv_prefix_ref(p); | |
653 | ||
654 | /* Then, remove the old entry. */ | |
56aa5143 YW |
655 | LIST_REMOVE(prefix, ra->prefixes, found); |
656 | sd_radv_prefix_unref(found); | |
b9f27a05 YW |
657 | |
658 | /* Finally, add the new entry. */ | |
659 | LIST_APPEND(prefix, ra->prefixes, p); | |
660 | ||
661 | log_radv(ra, "Updated/replaced IPv6 prefix %s (preferred: %s, valid: %s)", | |
c71384a9 | 662 | addr_p, |
b9f27a05 YW |
663 | FORMAT_TIMESPAN(p->lifetime_preferred_usec, USEC_PER_SEC), |
664 | FORMAT_TIMESPAN(p->lifetime_valid_usec, USEC_PER_SEC)); | |
665 | } else { | |
666 | /* The prefix is new. Let's simply add it. */ | |
667 | ||
668 | sd_radv_prefix_ref(p); | |
669 | LIST_APPEND(prefix, ra->prefixes, p); | |
670 | ra->n_prefixes++; | |
204f99d2 | 671 | |
c71384a9 | 672 | log_radv(ra, "Added prefix %s", addr_p); |
b9f27a05 | 673 | } |
059d7b6e YW |
674 | |
675 | if (ra->state == RADV_STATE_IDLE) | |
676 | return 0; | |
677 | ||
059d7b6e | 678 | if (ra->ra_sent == 0) |
d601b566 | 679 | return 0; |
d601b566 | 680 | |
97efde65 | 681 | /* If RAs have already been sent, send an RA immediately to announce the newly-added prefix */ |
36653443 | 682 | r = radv_send_router(ra, NULL, ra->lifetime_usec); |
059d7b6e | 683 | if (r < 0) |
abb977a6 | 684 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added prefix %s, ignoring: %m", addr_p); |
059d7b6e | 685 | else |
c71384a9 | 686 | log_radv(ra, "Sent Router Advertisement for added/updated prefix %s.", addr_p); |
97efde65 | 687 | |
204f99d2 PF |
688 | return 0; |
689 | } | |
690 | ||
95931532 YW |
691 | void sd_radv_remove_prefix( |
692 | sd_radv *ra, | |
693 | const struct in6_addr *prefix, | |
694 | unsigned char prefixlen) { | |
34c169c4 | 695 | |
95931532 YW |
696 | if (!ra) |
697 | return; | |
34c169c4 | 698 | |
95931532 YW |
699 | if (!prefix) |
700 | return; | |
701 | ||
702 | LIST_FOREACH(prefix, cur, ra->prefixes) { | |
34c169c4 PF |
703 | if (prefixlen != cur->opt.prefixlen) |
704 | continue; | |
705 | ||
94876904 | 706 | if (!in6_addr_equal(prefix, &cur->opt.in6_addr)) |
34c169c4 PF |
707 | continue; |
708 | ||
709 | LIST_REMOVE(prefix, ra->prefixes, cur); | |
710 | ra->n_prefixes--; | |
62bbbedf | 711 | sd_radv_prefix_unref(cur); |
95931532 | 712 | return; |
34c169c4 | 713 | } |
34c169c4 PF |
714 | } |
715 | ||
17347053 | 716 | int sd_radv_add_route_prefix(sd_radv *ra, sd_radv_route_prefix *p) { |
03677889 | 717 | sd_radv_route_prefix *found = NULL; |
203d4df5 SS |
718 | int r; |
719 | ||
720 | assert_return(ra, -EINVAL); | |
acbb5500 | 721 | assert_return(p, -EINVAL); |
203d4df5 | 722 | |
c71384a9 | 723 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
203d4df5 SS |
724 | |
725 | LIST_FOREACH(prefix, cur, ra->route_prefixes) { | |
203d4df5 | 726 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 727 | (const union in_addr_union*) &cur->opt.in6_addr, |
203d4df5 | 728 | cur->opt.prefixlen, |
c633628d | 729 | (const union in_addr_union*) &p->opt.in6_addr, |
203d4df5 SS |
730 | p->opt.prefixlen); |
731 | if (r < 0) | |
732 | return r; | |
733 | if (r == 0) | |
734 | continue; | |
735 | ||
95e104e0 | 736 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 737 | found = cur; |
b9f27a05 | 738 | break; |
95e104e0 | 739 | } |
203d4df5 | 740 | |
35388783 | 741 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 742 | "IPv6 route prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
743 | addr_p, |
744 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
203d4df5 SS |
745 | } |
746 | ||
56aa5143 | 747 | if (found) { |
b9f27a05 YW |
748 | /* p and cur may be equivalent. First increment the reference counter. */ |
749 | sd_radv_route_prefix_ref(p); | |
750 | ||
751 | /* Then, remove the old entry. */ | |
56aa5143 YW |
752 | LIST_REMOVE(prefix, ra->route_prefixes, found); |
753 | sd_radv_route_prefix_unref(found); | |
b9f27a05 YW |
754 | |
755 | /* Finally, add the new entry. */ | |
756 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
757 | ||
758 | log_radv(ra, "Updated/replaced IPv6 route prefix %s (lifetime: %s)", | |
759 | strna(addr_p), | |
760 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
761 | } else { | |
762 | /* The route prefix is new. Let's simply add it. */ | |
763 | ||
764 | sd_radv_route_prefix_ref(p); | |
765 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
766 | ra->n_route_prefixes++; | |
767 | ||
768 | log_radv(ra, "Added route prefix %s", strna(addr_p)); | |
769 | } | |
059d7b6e YW |
770 | |
771 | if (ra->state == RADV_STATE_IDLE) | |
772 | return 0; | |
773 | ||
059d7b6e | 774 | if (ra->ra_sent == 0) |
203d4df5 | 775 | return 0; |
203d4df5 | 776 | |
97efde65 | 777 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ |
36653443 | 778 | r = radv_send_router(ra, NULL, ra->lifetime_usec); |
059d7b6e | 779 | if (r < 0) |
abb977a6 | 780 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added route prefix %s, ignoring: %m", |
b9f27a05 | 781 | strna(addr_p)); |
059d7b6e | 782 | else |
b9f27a05 | 783 | log_radv(ra, "Sent Router Advertisement for added route prefix %s.", strna(addr_p)); |
97efde65 | 784 | |
203d4df5 SS |
785 | return 0; |
786 | } | |
787 | ||
1925f829 SS |
788 | int sd_radv_add_pref64_prefix(sd_radv *ra, sd_radv_pref64_prefix *p) { |
789 | sd_radv_pref64_prefix *found = NULL; | |
790 | int r; | |
791 | ||
792 | assert_return(ra, -EINVAL); | |
793 | assert_return(p, -EINVAL); | |
794 | ||
795 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->in6_addr, p->prefixlen); | |
796 | ||
797 | LIST_FOREACH(prefix, cur, ra->pref64_prefixes) { | |
798 | r = in_addr_prefix_intersect(AF_INET6, | |
799 | (const union in_addr_union*) &cur->in6_addr, | |
800 | cur->prefixlen, | |
801 | (const union in_addr_union*) &p->in6_addr, | |
802 | p->prefixlen); | |
803 | if (r < 0) | |
804 | return r; | |
805 | if (r == 0) | |
806 | continue; | |
807 | ||
808 | if (cur->prefixlen == p->prefixlen) { | |
809 | found = cur; | |
810 | break; | |
811 | } | |
812 | ||
813 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), | |
814 | "IPv6 PREF64 prefix %s conflicts with %s, ignoring.", | |
815 | addr_p, | |
816 | IN6_ADDR_PREFIX_TO_STRING(&cur->in6_addr, cur->prefixlen)); | |
817 | } | |
818 | ||
819 | if (found) { | |
820 | /* p and cur may be equivalent. First increment the reference counter. */ | |
821 | sd_radv_pref64_prefix_ref(p); | |
822 | ||
823 | /* Then, remove the old entry. */ | |
824 | LIST_REMOVE(prefix, ra->pref64_prefixes, found); | |
825 | sd_radv_pref64_prefix_unref(found); | |
826 | ||
827 | /* Finally, add the new entry. */ | |
828 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
829 | ||
830 | log_radv(ra, "Updated/replaced IPv6 PREF64 prefix %s (lifetime: %s)", | |
831 | strna(addr_p), | |
832 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
833 | } else { | |
834 | /* The route prefix is new. Let's simply add it. */ | |
835 | ||
836 | sd_radv_pref64_prefix_ref(p); | |
837 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
838 | ra->n_pref64_prefixes++; | |
839 | ||
840 | log_radv(ra, "Added PREF64 prefix %s", strna(addr_p)); | |
841 | } | |
842 | ||
843 | if (ra->state == RADV_STATE_IDLE) | |
844 | return 0; | |
845 | ||
846 | if (ra->ra_sent == 0) | |
847 | return 0; | |
848 | ||
849 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ | |
36653443 | 850 | r = radv_send_router(ra, NULL, ra->lifetime_usec); |
1925f829 SS |
851 | if (r < 0) |
852 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added PREF64 prefix %s, ignoring: %m", | |
853 | strna(addr_p)); | |
854 | else | |
855 | log_radv(ra, "Sent Router Advertisement for added PREF64 prefix %s.", strna(addr_p)); | |
856 | ||
857 | return 0; | |
858 | } | |
859 | ||
faaf3d66 YW |
860 | int sd_radv_set_rdnss( |
861 | sd_radv *ra, | |
eca280c8 | 862 | uint64_t lifetime_usec, |
faaf3d66 YW |
863 | const struct in6_addr *dns, |
864 | size_t n_dns) { | |
865 | ||
e9c6da38 PF |
866 | _cleanup_free_ struct sd_radv_opt_dns *opt_rdnss = NULL; |
867 | size_t len; | |
868 | ||
869 | assert_return(ra, -EINVAL); | |
870 | assert_return(n_dns < 128, -EINVAL); | |
871 | ||
eca280c8 YW |
872 | if (lifetime_usec > RADV_RDNSS_MAX_LIFETIME_USEC) |
873 | return -EINVAL; | |
874 | ||
e9c6da38 PF |
875 | if (!dns || n_dns == 0) { |
876 | ra->rdnss = mfree(ra->rdnss); | |
877 | ra->n_rdnss = 0; | |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
882 | len = sizeof(struct sd_radv_opt_dns) + sizeof(struct in6_addr) * n_dns; | |
883 | ||
884 | opt_rdnss = malloc0(len); | |
885 | if (!opt_rdnss) | |
886 | return -ENOMEM; | |
887 | ||
d6fc0d67 | 888 | opt_rdnss->type = RADV_OPT_RDNSS; |
e9c6da38 | 889 | opt_rdnss->length = len / 8; |
eca280c8 | 890 | opt_rdnss->lifetime = usec_to_be32_sec(lifetime_usec); |
e9c6da38 PF |
891 | |
892 | memcpy(opt_rdnss + 1, dns, n_dns * sizeof(struct in6_addr)); | |
893 | ||
1cc6c93a | 894 | free_and_replace(ra->rdnss, opt_rdnss); |
e9c6da38 PF |
895 | |
896 | ra->n_rdnss = n_dns; | |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
faaf3d66 YW |
901 | int sd_radv_set_dnssl( |
902 | sd_radv *ra, | |
eca280c8 | 903 | uint64_t lifetime_usec, |
faaf3d66 YW |
904 | char **search_list) { |
905 | ||
e965d6ab PF |
906 | _cleanup_free_ struct sd_radv_opt_dns *opt_dnssl = NULL; |
907 | size_t len = 0; | |
e965d6ab PF |
908 | uint8_t *p; |
909 | ||
910 | assert_return(ra, -EINVAL); | |
911 | ||
eca280c8 YW |
912 | if (lifetime_usec > RADV_DNSSL_MAX_LIFETIME_USEC) |
913 | return -EINVAL; | |
914 | ||
97d7974b | 915 | if (strv_isempty(search_list)) { |
e965d6ab | 916 | ra->dnssl = mfree(ra->dnssl); |
e965d6ab PF |
917 | return 0; |
918 | } | |
919 | ||
920 | STRV_FOREACH(s, search_list) | |
921 | len += strlen(*s) + 2; | |
922 | ||
923 | len = (sizeof(struct sd_radv_opt_dns) + len + 7) & ~0x7; | |
924 | ||
925 | opt_dnssl = malloc0(len); | |
926 | if (!opt_dnssl) | |
927 | return -ENOMEM; | |
928 | ||
d6fc0d67 | 929 | opt_dnssl->type = RADV_OPT_DNSSL; |
e965d6ab | 930 | opt_dnssl->length = len / 8; |
eca280c8 | 931 | opt_dnssl->lifetime = usec_to_be32_sec(lifetime_usec); |
e965d6ab PF |
932 | |
933 | p = (uint8_t *)(opt_dnssl + 1); | |
934 | len -= sizeof(struct sd_radv_opt_dns); | |
935 | ||
936 | STRV_FOREACH(s, search_list) { | |
937 | int r; | |
938 | ||
939 | r = dns_name_to_wire_format(*s, p, len, false); | |
940 | if (r < 0) | |
941 | return r; | |
942 | ||
943 | if (len < (size_t)r) | |
944 | return -ENOBUFS; | |
945 | ||
946 | p += r; | |
947 | len -= r; | |
948 | } | |
949 | ||
1cc6c93a | 950 | free_and_replace(ra->dnssl, opt_dnssl); |
e965d6ab PF |
951 | |
952 | return 0; | |
953 | } | |
954 | ||
17347053 | 955 | int sd_radv_prefix_new(sd_radv_prefix **ret) { |
d2c8eed2 | 956 | sd_radv_prefix *p; |
04473969 PF |
957 | |
958 | assert_return(ret, -EINVAL); | |
959 | ||
d2c8eed2 | 960 | p = new(sd_radv_prefix, 1); |
04473969 PF |
961 | if (!p) |
962 | return -ENOMEM; | |
963 | ||
d2c8eed2 LP |
964 | *p = (sd_radv_prefix) { |
965 | .n_ref = 1, | |
04473969 | 966 | |
d2c8eed2 LP |
967 | .opt.type = ND_OPT_PREFIX_INFORMATION, |
968 | .opt.length = (sizeof(p->opt) - 1)/8 + 1, | |
969 | .opt.prefixlen = 64, | |
04473969 | 970 | |
d2c8eed2 LP |
971 | /* RFC 4861, Section 6.2.1 */ |
972 | .opt.flags = ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO, | |
204f99d2 | 973 | |
d951507d YW |
974 | .lifetime_valid_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
975 | .lifetime_preferred_usec = RADV_DEFAULT_PREFERRED_LIFETIME_USEC, | |
95e104e0 YW |
976 | .valid_until = USEC_INFINITY, |
977 | .preferred_until = USEC_INFINITY, | |
d2c8eed2 | 978 | }; |
04473969 | 979 | |
d2c8eed2 | 980 | *ret = p; |
04473969 PF |
981 | return 0; |
982 | } | |
983 | ||
8301aa0b | 984 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_prefix, sd_radv_prefix, mfree); |
04473969 | 985 | |
faaf3d66 YW |
986 | int sd_radv_prefix_set_prefix( |
987 | sd_radv_prefix *p, | |
988 | const struct in6_addr *in6_addr, | |
989 | unsigned char prefixlen) { | |
990 | ||
04473969 PF |
991 | assert_return(p, -EINVAL); |
992 | assert_return(in6_addr, -EINVAL); | |
993 | ||
994 | if (prefixlen < 3 || prefixlen > 128) | |
995 | return -EINVAL; | |
996 | ||
997 | if (prefixlen > 64) | |
998 | /* unusual but allowed, log it */ | |
35388783 | 999 | log_radv(NULL, "Unusual prefix length %d greater than 64", prefixlen); |
04473969 PF |
1000 | |
1001 | p->opt.in6_addr = *in6_addr; | |
1002 | p->opt.prefixlen = prefixlen; | |
1003 | ||
1004 | return 0; | |
1005 | } | |
1006 | ||
faaf3d66 YW |
1007 | int sd_radv_prefix_get_prefix( |
1008 | sd_radv_prefix *p, | |
1009 | struct in6_addr *ret_in6_addr, | |
1010 | unsigned char *ret_prefixlen) { | |
1011 | ||
34332af2 SS |
1012 | assert_return(p, -EINVAL); |
1013 | assert_return(ret_in6_addr, -EINVAL); | |
1014 | assert_return(ret_prefixlen, -EINVAL); | |
1015 | ||
1016 | *ret_in6_addr = p->opt.in6_addr; | |
1017 | *ret_prefixlen = p->opt.prefixlen; | |
1018 | ||
1019 | return 0; | |
1020 | } | |
1021 | ||
17347053 | 1022 | int sd_radv_prefix_set_onlink(sd_radv_prefix *p, int onlink) { |
04473969 PF |
1023 | assert_return(p, -EINVAL); |
1024 | ||
1025 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, onlink); | |
1026 | ||
1027 | return 0; | |
1028 | } | |
1029 | ||
faaf3d66 | 1030 | int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix *p, int address_autoconfiguration) { |
04473969 PF |
1031 | assert_return(p, -EINVAL); |
1032 | ||
1033 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, address_autoconfiguration); | |
1034 | ||
1035 | return 0; | |
1036 | } | |
1037 | ||
17347053 | 1038 | int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
1039 | assert_return(p, -EINVAL); |
1040 | ||
95e104e0 YW |
1041 | p->lifetime_valid_usec = lifetime_usec; |
1042 | p->valid_until = valid_until; | |
04473969 PF |
1043 | |
1044 | return 0; | |
1045 | } | |
1046 | ||
17347053 | 1047 | int sd_radv_prefix_set_preferred_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
1048 | assert_return(p, -EINVAL); |
1049 | ||
95e104e0 YW |
1050 | p->lifetime_preferred_usec = lifetime_usec; |
1051 | p->preferred_until = valid_until; | |
04473969 PF |
1052 | |
1053 | return 0; | |
1054 | } | |
203d4df5 | 1055 | |
17347053 | 1056 | int sd_radv_route_prefix_new(sd_radv_route_prefix **ret) { |
203d4df5 SS |
1057 | sd_radv_route_prefix *p; |
1058 | ||
1059 | assert_return(ret, -EINVAL); | |
1060 | ||
1061 | p = new(sd_radv_route_prefix, 1); | |
1062 | if (!p) | |
1063 | return -ENOMEM; | |
1064 | ||
1065 | *p = (sd_radv_route_prefix) { | |
1066 | .n_ref = 1, | |
1067 | ||
d6fc0d67 | 1068 | .opt.type = RADV_OPT_ROUTE_INFORMATION, |
203d4df5 SS |
1069 | .opt.length = DIV_ROUND_UP(sizeof(p->opt), 8), |
1070 | .opt.prefixlen = 64, | |
1071 | ||
d951507d | 1072 | .lifetime_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
95e104e0 | 1073 | .valid_until = USEC_INFINITY, |
203d4df5 SS |
1074 | }; |
1075 | ||
1076 | *ret = p; | |
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_route_prefix, sd_radv_route_prefix, mfree); | |
1081 | ||
faaf3d66 YW |
1082 | int sd_radv_route_prefix_set_prefix( |
1083 | sd_radv_route_prefix *p, | |
1084 | const struct in6_addr *in6_addr, | |
1085 | unsigned char prefixlen) { | |
1086 | ||
203d4df5 SS |
1087 | assert_return(p, -EINVAL); |
1088 | assert_return(in6_addr, -EINVAL); | |
1089 | ||
1090 | if (prefixlen > 128) | |
1091 | return -EINVAL; | |
1092 | ||
1093 | if (prefixlen > 64) | |
1094 | /* unusual but allowed, log it */ | |
35388783 | 1095 | log_radv(NULL, "Unusual prefix length %u greater than 64", prefixlen); |
203d4df5 SS |
1096 | |
1097 | p->opt.in6_addr = *in6_addr; | |
1098 | p->opt.prefixlen = prefixlen; | |
1099 | ||
1100 | return 0; | |
1101 | } | |
1102 | ||
17347053 | 1103 | int sd_radv_route_prefix_set_lifetime(sd_radv_route_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
203d4df5 SS |
1104 | assert_return(p, -EINVAL); |
1105 | ||
95e104e0 YW |
1106 | p->lifetime_usec = lifetime_usec; |
1107 | p->valid_until = valid_until; | |
203d4df5 SS |
1108 | |
1109 | return 0; | |
1110 | } | |
1925f829 SS |
1111 | |
1112 | int sd_radv_pref64_prefix_new(sd_radv_pref64_prefix **ret) { | |
1113 | sd_radv_pref64_prefix *p; | |
1114 | ||
1115 | assert_return(ret, -EINVAL); | |
1116 | ||
1117 | p = new(sd_radv_pref64_prefix, 1); | |
1118 | if (!p) | |
1119 | return -ENOMEM; | |
1120 | ||
1121 | *p = (sd_radv_pref64_prefix) { | |
1122 | .n_ref = 1, | |
1123 | ||
1124 | .opt.type = RADV_OPT_PREF64, | |
1125 | .opt.length = 2, | |
1126 | }; | |
1127 | ||
1128 | *ret = p; | |
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_pref64_prefix, sd_radv_pref64_prefix, mfree); | |
1133 | ||
1134 | int sd_radv_pref64_prefix_set_prefix( | |
1135 | sd_radv_pref64_prefix *p, | |
1136 | const struct in6_addr *prefix, | |
1137 | uint8_t prefixlen, | |
1138 | uint64_t lifetime_usec) { | |
1139 | ||
1140 | uint16_t pref64_lifetime; | |
1141 | uint8_t prefixlen_code; | |
6e8f5e4c | 1142 | int r; |
1925f829 SS |
1143 | |
1144 | assert_return(p, -EINVAL); | |
1145 | assert_return(prefix, -EINVAL); | |
1146 | ||
6e8f5e4c SS |
1147 | r = pref64_prefix_length_to_plc(prefixlen, &prefixlen_code); |
1148 | if (r < 0) | |
f31fa080 ZJS |
1149 | return log_radv_errno(NULL, r, |
1150 | "Unsupported PREF64 prefix length %u. Valid lengths are 32, 40, 48, 56, 64 and 96", prefixlen); | |
1925f829 | 1151 | |
eca280c8 | 1152 | if (lifetime_usec > PREF64_MAX_LIFETIME_USEC) |
1925f829 SS |
1153 | return -EINVAL; |
1154 | ||
1155 | /* RFC 8781 - 4.1 rounding up lifetime to multiply of 8 */ | |
1156 | pref64_lifetime = DIV_ROUND_UP(lifetime_usec, 8 * USEC_PER_SEC) << 3; | |
1157 | pref64_lifetime |= prefixlen_code; | |
1158 | ||
1159 | unaligned_write_be16(&p->opt.lifetime_and_plc, pref64_lifetime); | |
1160 | memcpy(&p->opt.prefix, prefix, sizeof(p->opt.prefix)); | |
1161 | ||
1162 | p->in6_addr = *prefix; | |
1163 | p->prefixlen = prefixlen; | |
1164 | ||
1165 | return 0; | |
1166 | } |