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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" |
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"); | |
50ba4e40 YW |
263 | if (r >= 0 && in6_addr_equal(&src, &ra->ipv6ll)) |
264 | /* This should be definitely caused by a misconfiguration. If we send RA to ourself, the | |
265 | * kernel complains about that. Let's ignore the packet. */ | |
266 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EADDRINUSE), "Received RS from the same interface, ignoring."); | |
88d5a3db | 267 | |
cc2bcbf6 YW |
268 | r = radv_send_router(ra, &src, ra->lifetime_usec); |
269 | if (r < 0) | |
270 | return log_radv_errno(ra, r, "Unable to send solicited Router Advertisement to %s, ignoring: %m", IN6_ADDR_TO_STRING(&src)); | |
88d5a3db | 271 | |
cc2bcbf6 YW |
272 | log_radv(ra, "Sent solicited Router Advertisement to %s.", IN6_ADDR_TO_STRING(&src)); |
273 | return 0; | |
274 | } | |
88d5a3db | 275 | |
cc2bcbf6 YW |
276 | static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
277 | _cleanup_(icmp6_packet_unrefp) ICMP6Packet *packet = NULL; | |
278 | sd_radv *ra = ASSERT_PTR(userdata); | |
279 | int r; | |
cfffddea | 280 | |
cc2bcbf6 | 281 | assert(fd >= 0); |
4961f566 | 282 | |
cc2bcbf6 YW |
283 | r = icmp6_packet_receive(fd, &packet); |
284 | if (r < 0) { | |
285 | log_radv_errno(ra, r, "Failed to receive ICMPv6 packet, ignoring: %m"); | |
286 | return 0; | |
287 | } | |
88d5a3db | 288 | |
cc2bcbf6 | 289 | (void) radv_process_packet(ra, packet); |
88d5a3db PF |
290 | return 0; |
291 | } | |
292 | ||
204fb681 | 293 | static int radv_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
7003b114 | 294 | usec_t min_timeout, max_timeout, time_now, timeout; |
99534007 | 295 | sd_radv *ra = ASSERT_PTR(userdata); |
7003b114 | 296 | int r; |
204fb681 PF |
297 | |
298 | assert(s); | |
204fb681 | 299 | assert(ra->event); |
80477557 | 300 | assert(router_lifetime_is_valid(ra->lifetime_usec)); |
204fb681 | 301 | |
ba4e0427 | 302 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
204fb681 PF |
303 | if (r < 0) |
304 | goto fail; | |
305 | ||
36653443 | 306 | r = radv_send_router(ra, NULL, ra->lifetime_usec); |
204fb681 | 307 | if (r < 0) |
abb977a6 | 308 | log_radv_errno(ra, r, "Unable to send Router Advertisement, ignoring: %m"); |
204fb681 PF |
309 | |
310 | /* RFC 4861, Section 6.2.4, sending initial Router Advertisements */ | |
80477557 | 311 | if (ra->ra_sent < RADV_MAX_INITIAL_RTR_ADVERTISEMENTS) |
d6fc0d67 | 312 | max_timeout = RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC; |
80477557 | 313 | else |
03ec10fd | 314 | max_timeout = RADV_DEFAULT_MAX_TIMEOUT_USEC; |
204fb681 | 315 | |
ef90b6a4 | 316 | /* RFC 4861, Section 6.2.1, lifetime must be at least MaxRtrAdvInterval, |
80477557 YW |
317 | * so lower the interval here */ |
318 | if (ra->lifetime_usec > 0) | |
319 | max_timeout = MIN(max_timeout, ra->lifetime_usec); | |
320 | ||
321 | if (max_timeout >= 9 * USEC_PER_SEC) | |
ef90b6a4 | 322 | min_timeout = max_timeout / 3; |
80477557 YW |
323 | else |
324 | min_timeout = max_timeout * 3 / 4; | |
ef90b6a4 | 325 | |
80477557 YW |
326 | /* RFC 4861, Section 6.2.1. |
327 | * MaxRtrAdvInterval MUST be no less than 4 seconds and no greater than 1800 seconds. | |
328 | * MinRtrAdvInterval MUST be no less than 3 seconds and no greater than .75 * MaxRtrAdvInterval. */ | |
329 | assert(max_timeout >= RADV_MIN_MAX_TIMEOUT_USEC); | |
330 | assert(max_timeout <= RADV_MAX_MAX_TIMEOUT_USEC); | |
331 | assert(min_timeout >= RADV_MIN_MIN_TIMEOUT_USEC); | |
332 | assert(min_timeout <= max_timeout * 3 / 4); | |
ef90b6a4 | 333 | |
80477557 | 334 | timeout = min_timeout + random_u64_range(max_timeout - min_timeout); |
5291f26d | 335 | log_radv(ra, "Next Router Advertisement in %s", FORMAT_TIMESPAN(timeout, USEC_PER_SEC)); |
204fb681 | 336 | |
807a8ede | 337 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 338 | CLOCK_BOOTTIME, |
80477557 | 339 | usec_add(time_now, timeout), MSEC_PER_SEC, |
807a8ede YW |
340 | radv_timeout, ra, |
341 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
342 | if (r < 0) |
343 | goto fail; | |
344 | ||
345 | ra->ra_sent++; | |
346 | ||
807a8ede YW |
347 | return 0; |
348 | ||
204fb681 | 349 | fail: |
290696e5 | 350 | sd_radv_stop(ra); |
204fb681 PF |
351 | |
352 | return 0; | |
353 | } | |
354 | ||
17347053 | 355 | int sd_radv_stop(sd_radv *ra) { |
204fb681 PF |
356 | int r; |
357 | ||
c8bae363 YW |
358 | if (!ra) |
359 | return 0; | |
204f99d2 | 360 | |
d6fc0d67 | 361 | if (ra->state == RADV_STATE_IDLE) |
6f8a8b84 SS |
362 | return 0; |
363 | ||
35388783 | 364 | log_radv(ra, "Stopping IPv6 Router Advertisement daemon"); |
204f99d2 | 365 | |
36653443 YW |
366 | /* RFC 4861, Section 6.2.5: |
367 | * the router SHOULD transmit one or more (but not more than MAX_FINAL_RTR_ADVERTISEMENTS) final | |
368 | * multicast Router Advertisements on the interface with a Router Lifetime field of zero. */ | |
369 | r = radv_send_router(ra, NULL, 0); | |
290696e5 | 370 | if (r < 0) |
abb977a6 | 371 | log_radv_errno(ra, r, "Unable to send last Router Advertisement with router lifetime set to zero, ignoring: %m"); |
204fb681 PF |
372 | |
373 | radv_reset(ra); | |
77baf5ae | 374 | ra->fd = safe_close(ra->fd); |
d6fc0d67 | 375 | ra->state = RADV_STATE_IDLE; |
204f99d2 PF |
376 | |
377 | return 0; | |
378 | } | |
379 | ||
36653443 YW |
380 | static int radv_setup_recv_event(sd_radv *ra) { |
381 | int r; | |
382 | ||
383 | assert(ra); | |
384 | assert(ra->event); | |
385 | assert(ra->ifindex > 0); | |
386 | ||
387 | _cleanup_close_ int fd = -EBADF; | |
388 | fd = icmp6_bind(ra->ifindex, /* is_router = */ true); | |
389 | if (fd < 0) | |
390 | return fd; | |
391 | ||
392 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
393 | r = sd_event_add_io(ra->event, &s, fd, EPOLLIN, radv_recv, ra); | |
394 | if (r < 0) | |
395 | return r; | |
396 | ||
397 | r = sd_event_source_set_priority(s, ra->event_priority); | |
398 | if (r < 0) | |
399 | return r; | |
400 | ||
401 | (void) sd_event_source_set_description(s, "radv-receive-message"); | |
402 | ||
403 | ra->fd = TAKE_FD(fd); | |
404 | ra->recv_event_source = TAKE_PTR(s); | |
405 | return 0; | |
406 | } | |
407 | ||
17347053 | 408 | int sd_radv_start(sd_radv *ra) { |
f474884c | 409 | int r; |
204fb681 | 410 | |
204f99d2 PF |
411 | assert_return(ra, -EINVAL); |
412 | assert_return(ra->event, -EINVAL); | |
413 | assert_return(ra->ifindex > 0, -EINVAL); | |
414 | ||
d6fc0d67 | 415 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
416 | return 0; |
417 | ||
36653443 YW |
418 | r = radv_setup_recv_event(ra); |
419 | if (r < 0) | |
420 | goto fail; | |
421 | ||
807a8ede | 422 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 423 | CLOCK_BOOTTIME, |
807a8ede YW |
424 | 0, 0, |
425 | radv_timeout, ra, | |
426 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
427 | if (r < 0) |
428 | goto fail; | |
429 | ||
d6fc0d67 | 430 | ra->state = RADV_STATE_ADVERTISING; |
204f99d2 | 431 | |
35388783 | 432 | log_radv(ra, "Started IPv6 Router Advertisement daemon"); |
204f99d2 PF |
433 | |
434 | return 0; | |
204fb681 PF |
435 | |
436 | fail: | |
437 | radv_reset(ra); | |
438 | ||
439 | return r; | |
204f99d2 PF |
440 | } |
441 | ||
17347053 | 442 | int sd_radv_set_ifindex(sd_radv *ra, int ifindex) { |
204f99d2 | 443 | assert_return(ra, -EINVAL); |
7fa69c0a | 444 | assert_return(ifindex > 0, -EINVAL); |
204f99d2 | 445 | |
d6fc0d67 | 446 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
447 | return -EBUSY; |
448 | ||
449 | ra->ifindex = ifindex; | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
61a9fa8f YW |
454 | int sd_radv_set_ifname(sd_radv *ra, const char *ifname) { |
455 | assert_return(ra, -EINVAL); | |
456 | assert_return(ifname, -EINVAL); | |
457 | ||
458 | if (!ifname_valid_full(ifname, IFNAME_VALID_ALTERNATIVE)) | |
459 | return -EINVAL; | |
460 | ||
461 | return free_and_strdup(&ra->ifname, ifname); | |
462 | } | |
463 | ||
5977b71f YW |
464 | int sd_radv_get_ifname(sd_radv *ra, const char **ret) { |
465 | int r; | |
466 | ||
467 | assert_return(ra, -EINVAL); | |
61a9fa8f | 468 | |
5977b71f YW |
469 | r = get_ifname(ra->ifindex, &ra->ifname); |
470 | if (r < 0) | |
471 | return r; | |
472 | ||
473 | if (ret) | |
474 | *ret = ra->ifname; | |
475 | ||
476 | return 0; | |
61a9fa8f YW |
477 | } |
478 | ||
50ba4e40 YW |
479 | int sd_radv_set_link_local_address(sd_radv *ra, const struct in6_addr *addr) { |
480 | assert_return(ra, -EINVAL); | |
481 | assert_return(!addr || in6_addr_is_link_local(addr), -EINVAL); | |
482 | ||
483 | if (addr) | |
484 | ra->ipv6ll = *addr; | |
485 | else | |
486 | zero(ra->ipv6ll); | |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
17347053 | 491 | int sd_radv_set_mac(sd_radv *ra, const struct ether_addr *mac_addr) { |
204f99d2 PF |
492 | assert_return(ra, -EINVAL); |
493 | ||
d6fc0d67 | 494 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
495 | return -EBUSY; |
496 | ||
497 | if (mac_addr) | |
498 | ra->mac_addr = *mac_addr; | |
499 | else | |
500 | zero(ra->mac_addr); | |
501 | ||
502 | return 0; | |
503 | } | |
504 | ||
17347053 | 505 | int sd_radv_set_mtu(sd_radv *ra, uint32_t mtu) { |
204f99d2 PF |
506 | assert_return(ra, -EINVAL); |
507 | assert_return(mtu >= 1280, -EINVAL); | |
508 | ||
204f99d2 PF |
509 | ra->mtu = mtu; |
510 | ||
511 | return 0; | |
512 | } | |
513 | ||
17347053 | 514 | int sd_radv_set_hop_limit(sd_radv *ra, uint8_t hop_limit) { |
204f99d2 PF |
515 | assert_return(ra, -EINVAL); |
516 | ||
d6fc0d67 | 517 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
518 | return -EBUSY; |
519 | ||
520 | ra->hop_limit = hop_limit; | |
521 | ||
522 | return 0; | |
523 | } | |
524 | ||
eca280c8 | 525 | int sd_radv_set_retransmit(sd_radv *ra, uint64_t usec) { |
fdc4c67c SS |
526 | assert_return(ra, -EINVAL); |
527 | ||
528 | if (ra->state != RADV_STATE_IDLE) | |
529 | return -EBUSY; | |
530 | ||
eca280c8 YW |
531 | if (usec > RADV_MAX_RETRANSMIT_USEC) |
532 | return -EINVAL; | |
fdc4c67c | 533 | |
eca280c8 | 534 | ra->retransmit_usec = usec; |
fdc4c67c SS |
535 | return 0; |
536 | } | |
537 | ||
eca280c8 | 538 | int sd_radv_set_router_lifetime(sd_radv *ra, uint64_t usec) { |
204f99d2 PF |
539 | assert_return(ra, -EINVAL); |
540 | ||
d6fc0d67 | 541 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
542 | return -EBUSY; |
543 | ||
eca280c8 | 544 | if (!router_lifetime_is_valid(usec)) |
09457670 YW |
545 | return -EINVAL; |
546 | ||
ac138551 YW |
547 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
548 | * to (00) by the sender..." */ | |
eca280c8 | 549 | if (usec == 0 && |
204f99d2 | 550 | (ra->flags & (0x3 << 3)) != (SD_NDISC_PREFERENCE_MEDIUM << 3)) |
09457670 | 551 | return -EINVAL; |
204f99d2 | 552 | |
eca280c8 | 553 | ra->lifetime_usec = usec; |
204f99d2 PF |
554 | return 0; |
555 | } | |
556 | ||
17347053 | 557 | int sd_radv_set_managed_information(sd_radv *ra, int managed) { |
204f99d2 PF |
558 | assert_return(ra, -EINVAL); |
559 | ||
d6fc0d67 | 560 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
561 | return -EBUSY; |
562 | ||
563 | SET_FLAG(ra->flags, ND_RA_FLAG_MANAGED, managed); | |
564 | ||
565 | return 0; | |
566 | } | |
567 | ||
17347053 | 568 | int sd_radv_set_other_information(sd_radv *ra, int other) { |
204f99d2 PF |
569 | assert_return(ra, -EINVAL); |
570 | ||
d6fc0d67 | 571 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
572 | return -EBUSY; |
573 | ||
574 | SET_FLAG(ra->flags, ND_RA_FLAG_OTHER, other); | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
17347053 | 579 | int sd_radv_set_preference(sd_radv *ra, unsigned preference) { |
204f99d2 PF |
580 | assert_return(ra, -EINVAL); |
581 | assert_return(IN_SET(preference, | |
582 | SD_NDISC_PREFERENCE_LOW, | |
583 | SD_NDISC_PREFERENCE_MEDIUM, | |
584 | SD_NDISC_PREFERENCE_HIGH), -EINVAL); | |
585 | ||
dd1b1870 YW |
586 | /* RFC 4191, Section 2.2, "...If the Router Lifetime is zero, the preference value MUST be set |
587 | * to (00) by the sender..." */ | |
7003b114 | 588 | if (ra->lifetime_usec == 0 && preference != SD_NDISC_PREFERENCE_MEDIUM) |
dd1b1870 YW |
589 | return -EINVAL; |
590 | ||
204f99d2 PF |
591 | ra->flags = (ra->flags & ~(0x3 << 3)) | (preference << 3); |
592 | ||
dd1b1870 | 593 | return 0; |
204f99d2 PF |
594 | } |
595 | ||
6a6d27bc SS |
596 | int sd_radv_set_home_agent_information(sd_radv *ra, int home_agent) { |
597 | assert_return(ra, -EINVAL); | |
598 | ||
599 | if (ra->state != RADV_STATE_IDLE) | |
600 | return -EBUSY; | |
601 | ||
602 | SET_FLAG(ra->flags, ND_RA_FLAG_HOME_AGENT, home_agent); | |
603 | ||
604 | return 0; | |
605 | } | |
606 | ||
607 | int sd_radv_set_home_agent_preference(sd_radv *ra, uint16_t preference) { | |
608 | assert_return(ra, -EINVAL); | |
609 | ||
610 | if (ra->state != RADV_STATE_IDLE) | |
611 | return -EBUSY; | |
612 | ||
613 | ra->home_agent.nd_opt_home_agent_info_preference = htobe16(preference); | |
614 | ||
615 | return 0; | |
616 | } | |
617 | ||
eca280c8 | 618 | int sd_radv_set_home_agent_lifetime(sd_radv *ra, uint64_t lifetime_usec) { |
6a6d27bc SS |
619 | assert_return(ra, -EINVAL); |
620 | ||
621 | if (ra->state != RADV_STATE_IDLE) | |
622 | return -EBUSY; | |
623 | ||
eca280c8 YW |
624 | if (lifetime_usec > RADV_HOME_AGENT_MAX_LIFETIME_USEC) |
625 | return -EINVAL; | |
6a6d27bc | 626 | |
eca280c8 | 627 | ra->home_agent.nd_opt_home_agent_info_lifetime = usec_to_be16_sec(lifetime_usec); |
6a6d27bc SS |
628 | return 0; |
629 | } | |
630 | ||
17347053 | 631 | int sd_radv_add_prefix(sd_radv *ra, sd_radv_prefix *p) { |
03677889 | 632 | sd_radv_prefix *found = NULL; |
d601b566 | 633 | int r; |
204f99d2 PF |
634 | |
635 | assert_return(ra, -EINVAL); | |
acbb5500 | 636 | assert_return(p, -EINVAL); |
204f99d2 | 637 | |
59ea6e57 | 638 | /* Refuse prefixes that don't have a prefix set */ |
94876904 | 639 | if (in6_addr_is_null(&p->opt.in6_addr)) |
59ea6e57 LP |
640 | return -ENOEXEC; |
641 | ||
c71384a9 | 642 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
5380707a | 643 | |
204f99d2 | 644 | LIST_FOREACH(prefix, cur, ra->prefixes) { |
204f99d2 | 645 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 646 | (const union in_addr_union*) &cur->opt.in6_addr, |
204f99d2 | 647 | cur->opt.prefixlen, |
c633628d | 648 | (const union in_addr_union*) &p->opt.in6_addr, |
204f99d2 | 649 | p->opt.prefixlen); |
5380707a YW |
650 | if (r < 0) |
651 | return r; | |
652 | if (r == 0) | |
653 | continue; | |
204f99d2 | 654 | |
95e104e0 | 655 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 656 | found = cur; |
b9f27a05 | 657 | break; |
95e104e0 | 658 | } |
d601b566 | 659 | |
35388783 | 660 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 661 | "IPv6 prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
662 | addr_p, |
663 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
204f99d2 PF |
664 | } |
665 | ||
56aa5143 | 666 | if (found) { |
b9f27a05 YW |
667 | /* p and cur may be equivalent. First increment the reference counter. */ |
668 | sd_radv_prefix_ref(p); | |
669 | ||
670 | /* Then, remove the old entry. */ | |
56aa5143 YW |
671 | LIST_REMOVE(prefix, ra->prefixes, found); |
672 | sd_radv_prefix_unref(found); | |
b9f27a05 YW |
673 | |
674 | /* Finally, add the new entry. */ | |
675 | LIST_APPEND(prefix, ra->prefixes, p); | |
676 | ||
677 | log_radv(ra, "Updated/replaced IPv6 prefix %s (preferred: %s, valid: %s)", | |
c71384a9 | 678 | addr_p, |
b9f27a05 YW |
679 | FORMAT_TIMESPAN(p->lifetime_preferred_usec, USEC_PER_SEC), |
680 | FORMAT_TIMESPAN(p->lifetime_valid_usec, USEC_PER_SEC)); | |
681 | } else { | |
682 | /* The prefix is new. Let's simply add it. */ | |
683 | ||
684 | sd_radv_prefix_ref(p); | |
685 | LIST_APPEND(prefix, ra->prefixes, p); | |
686 | ra->n_prefixes++; | |
204f99d2 | 687 | |
c71384a9 | 688 | log_radv(ra, "Added prefix %s", addr_p); |
b9f27a05 | 689 | } |
059d7b6e YW |
690 | |
691 | if (ra->state == RADV_STATE_IDLE) | |
692 | return 0; | |
693 | ||
059d7b6e | 694 | if (ra->ra_sent == 0) |
d601b566 | 695 | return 0; |
d601b566 | 696 | |
97efde65 | 697 | /* If RAs have already been sent, send an RA immediately to announce the newly-added prefix */ |
36653443 | 698 | r = radv_send_router(ra, NULL, ra->lifetime_usec); |
059d7b6e | 699 | if (r < 0) |
abb977a6 | 700 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added prefix %s, ignoring: %m", addr_p); |
059d7b6e | 701 | else |
c71384a9 | 702 | log_radv(ra, "Sent Router Advertisement for added/updated prefix %s.", addr_p); |
97efde65 | 703 | |
204f99d2 PF |
704 | return 0; |
705 | } | |
706 | ||
95931532 YW |
707 | void sd_radv_remove_prefix( |
708 | sd_radv *ra, | |
709 | const struct in6_addr *prefix, | |
710 | unsigned char prefixlen) { | |
34c169c4 | 711 | |
95931532 YW |
712 | if (!ra) |
713 | return; | |
34c169c4 | 714 | |
95931532 YW |
715 | if (!prefix) |
716 | return; | |
717 | ||
718 | LIST_FOREACH(prefix, cur, ra->prefixes) { | |
34c169c4 PF |
719 | if (prefixlen != cur->opt.prefixlen) |
720 | continue; | |
721 | ||
94876904 | 722 | if (!in6_addr_equal(prefix, &cur->opt.in6_addr)) |
34c169c4 PF |
723 | continue; |
724 | ||
725 | LIST_REMOVE(prefix, ra->prefixes, cur); | |
726 | ra->n_prefixes--; | |
62bbbedf | 727 | sd_radv_prefix_unref(cur); |
95931532 | 728 | return; |
34c169c4 | 729 | } |
34c169c4 PF |
730 | } |
731 | ||
17347053 | 732 | int sd_radv_add_route_prefix(sd_radv *ra, sd_radv_route_prefix *p) { |
03677889 | 733 | sd_radv_route_prefix *found = NULL; |
203d4df5 SS |
734 | int r; |
735 | ||
736 | assert_return(ra, -EINVAL); | |
acbb5500 | 737 | assert_return(p, -EINVAL); |
203d4df5 | 738 | |
c71384a9 | 739 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
203d4df5 SS |
740 | |
741 | LIST_FOREACH(prefix, cur, ra->route_prefixes) { | |
203d4df5 | 742 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 743 | (const union in_addr_union*) &cur->opt.in6_addr, |
203d4df5 | 744 | cur->opt.prefixlen, |
c633628d | 745 | (const union in_addr_union*) &p->opt.in6_addr, |
203d4df5 SS |
746 | p->opt.prefixlen); |
747 | if (r < 0) | |
748 | return r; | |
749 | if (r == 0) | |
750 | continue; | |
751 | ||
95e104e0 | 752 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 753 | found = cur; |
b9f27a05 | 754 | break; |
95e104e0 | 755 | } |
203d4df5 | 756 | |
35388783 | 757 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 758 | "IPv6 route prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
759 | addr_p, |
760 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
203d4df5 SS |
761 | } |
762 | ||
56aa5143 | 763 | if (found) { |
b9f27a05 YW |
764 | /* p and cur may be equivalent. First increment the reference counter. */ |
765 | sd_radv_route_prefix_ref(p); | |
766 | ||
767 | /* Then, remove the old entry. */ | |
56aa5143 YW |
768 | LIST_REMOVE(prefix, ra->route_prefixes, found); |
769 | sd_radv_route_prefix_unref(found); | |
b9f27a05 YW |
770 | |
771 | /* Finally, add the new entry. */ | |
772 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
773 | ||
774 | log_radv(ra, "Updated/replaced IPv6 route prefix %s (lifetime: %s)", | |
775 | strna(addr_p), | |
776 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
777 | } else { | |
778 | /* The route prefix is new. Let's simply add it. */ | |
779 | ||
780 | sd_radv_route_prefix_ref(p); | |
781 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
782 | ra->n_route_prefixes++; | |
783 | ||
784 | log_radv(ra, "Added route prefix %s", strna(addr_p)); | |
785 | } | |
059d7b6e YW |
786 | |
787 | if (ra->state == RADV_STATE_IDLE) | |
788 | return 0; | |
789 | ||
059d7b6e | 790 | if (ra->ra_sent == 0) |
203d4df5 | 791 | return 0; |
203d4df5 | 792 | |
97efde65 | 793 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ |
36653443 | 794 | r = radv_send_router(ra, NULL, ra->lifetime_usec); |
059d7b6e | 795 | if (r < 0) |
abb977a6 | 796 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added route prefix %s, ignoring: %m", |
b9f27a05 | 797 | strna(addr_p)); |
059d7b6e | 798 | else |
b9f27a05 | 799 | log_radv(ra, "Sent Router Advertisement for added route prefix %s.", strna(addr_p)); |
97efde65 | 800 | |
203d4df5 SS |
801 | return 0; |
802 | } | |
803 | ||
1925f829 SS |
804 | int sd_radv_add_pref64_prefix(sd_radv *ra, sd_radv_pref64_prefix *p) { |
805 | sd_radv_pref64_prefix *found = NULL; | |
806 | int r; | |
807 | ||
808 | assert_return(ra, -EINVAL); | |
809 | assert_return(p, -EINVAL); | |
810 | ||
811 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->in6_addr, p->prefixlen); | |
812 | ||
813 | LIST_FOREACH(prefix, cur, ra->pref64_prefixes) { | |
814 | r = in_addr_prefix_intersect(AF_INET6, | |
815 | (const union in_addr_union*) &cur->in6_addr, | |
816 | cur->prefixlen, | |
817 | (const union in_addr_union*) &p->in6_addr, | |
818 | p->prefixlen); | |
819 | if (r < 0) | |
820 | return r; | |
821 | if (r == 0) | |
822 | continue; | |
823 | ||
824 | if (cur->prefixlen == p->prefixlen) { | |
825 | found = cur; | |
826 | break; | |
827 | } | |
828 | ||
829 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), | |
830 | "IPv6 PREF64 prefix %s conflicts with %s, ignoring.", | |
831 | addr_p, | |
832 | IN6_ADDR_PREFIX_TO_STRING(&cur->in6_addr, cur->prefixlen)); | |
833 | } | |
834 | ||
835 | if (found) { | |
836 | /* p and cur may be equivalent. First increment the reference counter. */ | |
837 | sd_radv_pref64_prefix_ref(p); | |
838 | ||
839 | /* Then, remove the old entry. */ | |
840 | LIST_REMOVE(prefix, ra->pref64_prefixes, found); | |
841 | sd_radv_pref64_prefix_unref(found); | |
842 | ||
843 | /* Finally, add the new entry. */ | |
844 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
845 | ||
846 | log_radv(ra, "Updated/replaced IPv6 PREF64 prefix %s (lifetime: %s)", | |
847 | strna(addr_p), | |
848 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
849 | } else { | |
850 | /* The route prefix is new. Let's simply add it. */ | |
851 | ||
852 | sd_radv_pref64_prefix_ref(p); | |
853 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
854 | ra->n_pref64_prefixes++; | |
855 | ||
856 | log_radv(ra, "Added PREF64 prefix %s", strna(addr_p)); | |
857 | } | |
858 | ||
859 | if (ra->state == RADV_STATE_IDLE) | |
860 | return 0; | |
861 | ||
862 | if (ra->ra_sent == 0) | |
863 | return 0; | |
864 | ||
865 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ | |
36653443 | 866 | r = radv_send_router(ra, NULL, ra->lifetime_usec); |
1925f829 SS |
867 | if (r < 0) |
868 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added PREF64 prefix %s, ignoring: %m", | |
869 | strna(addr_p)); | |
870 | else | |
871 | log_radv(ra, "Sent Router Advertisement for added PREF64 prefix %s.", strna(addr_p)); | |
872 | ||
873 | return 0; | |
874 | } | |
875 | ||
faaf3d66 YW |
876 | int sd_radv_set_rdnss( |
877 | sd_radv *ra, | |
eca280c8 | 878 | uint64_t lifetime_usec, |
faaf3d66 YW |
879 | const struct in6_addr *dns, |
880 | size_t n_dns) { | |
881 | ||
e9c6da38 PF |
882 | _cleanup_free_ struct sd_radv_opt_dns *opt_rdnss = NULL; |
883 | size_t len; | |
884 | ||
885 | assert_return(ra, -EINVAL); | |
886 | assert_return(n_dns < 128, -EINVAL); | |
887 | ||
eca280c8 YW |
888 | if (lifetime_usec > RADV_RDNSS_MAX_LIFETIME_USEC) |
889 | return -EINVAL; | |
890 | ||
e9c6da38 PF |
891 | if (!dns || n_dns == 0) { |
892 | ra->rdnss = mfree(ra->rdnss); | |
893 | ra->n_rdnss = 0; | |
894 | ||
895 | return 0; | |
896 | } | |
897 | ||
898 | len = sizeof(struct sd_radv_opt_dns) + sizeof(struct in6_addr) * n_dns; | |
899 | ||
900 | opt_rdnss = malloc0(len); | |
901 | if (!opt_rdnss) | |
902 | return -ENOMEM; | |
903 | ||
d6fc0d67 | 904 | opt_rdnss->type = RADV_OPT_RDNSS; |
e9c6da38 | 905 | opt_rdnss->length = len / 8; |
eca280c8 | 906 | opt_rdnss->lifetime = usec_to_be32_sec(lifetime_usec); |
e9c6da38 PF |
907 | |
908 | memcpy(opt_rdnss + 1, dns, n_dns * sizeof(struct in6_addr)); | |
909 | ||
1cc6c93a | 910 | free_and_replace(ra->rdnss, opt_rdnss); |
e9c6da38 PF |
911 | |
912 | ra->n_rdnss = n_dns; | |
913 | ||
914 | return 0; | |
915 | } | |
916 | ||
faaf3d66 YW |
917 | int sd_radv_set_dnssl( |
918 | sd_radv *ra, | |
eca280c8 | 919 | uint64_t lifetime_usec, |
faaf3d66 YW |
920 | char **search_list) { |
921 | ||
e965d6ab PF |
922 | _cleanup_free_ struct sd_radv_opt_dns *opt_dnssl = NULL; |
923 | size_t len = 0; | |
e965d6ab PF |
924 | uint8_t *p; |
925 | ||
926 | assert_return(ra, -EINVAL); | |
927 | ||
eca280c8 YW |
928 | if (lifetime_usec > RADV_DNSSL_MAX_LIFETIME_USEC) |
929 | return -EINVAL; | |
930 | ||
97d7974b | 931 | if (strv_isempty(search_list)) { |
e965d6ab | 932 | ra->dnssl = mfree(ra->dnssl); |
e965d6ab PF |
933 | return 0; |
934 | } | |
935 | ||
936 | STRV_FOREACH(s, search_list) | |
937 | len += strlen(*s) + 2; | |
938 | ||
939 | len = (sizeof(struct sd_radv_opt_dns) + len + 7) & ~0x7; | |
940 | ||
941 | opt_dnssl = malloc0(len); | |
942 | if (!opt_dnssl) | |
943 | return -ENOMEM; | |
944 | ||
d6fc0d67 | 945 | opt_dnssl->type = RADV_OPT_DNSSL; |
e965d6ab | 946 | opt_dnssl->length = len / 8; |
eca280c8 | 947 | opt_dnssl->lifetime = usec_to_be32_sec(lifetime_usec); |
e965d6ab PF |
948 | |
949 | p = (uint8_t *)(opt_dnssl + 1); | |
950 | len -= sizeof(struct sd_radv_opt_dns); | |
951 | ||
952 | STRV_FOREACH(s, search_list) { | |
953 | int r; | |
954 | ||
955 | r = dns_name_to_wire_format(*s, p, len, false); | |
956 | if (r < 0) | |
957 | return r; | |
958 | ||
959 | if (len < (size_t)r) | |
960 | return -ENOBUFS; | |
961 | ||
962 | p += r; | |
963 | len -= r; | |
964 | } | |
965 | ||
1cc6c93a | 966 | free_and_replace(ra->dnssl, opt_dnssl); |
e965d6ab PF |
967 | |
968 | return 0; | |
969 | } | |
970 | ||
17347053 | 971 | int sd_radv_prefix_new(sd_radv_prefix **ret) { |
d2c8eed2 | 972 | sd_radv_prefix *p; |
04473969 PF |
973 | |
974 | assert_return(ret, -EINVAL); | |
975 | ||
d2c8eed2 | 976 | p = new(sd_radv_prefix, 1); |
04473969 PF |
977 | if (!p) |
978 | return -ENOMEM; | |
979 | ||
d2c8eed2 LP |
980 | *p = (sd_radv_prefix) { |
981 | .n_ref = 1, | |
04473969 | 982 | |
d2c8eed2 LP |
983 | .opt.type = ND_OPT_PREFIX_INFORMATION, |
984 | .opt.length = (sizeof(p->opt) - 1)/8 + 1, | |
985 | .opt.prefixlen = 64, | |
04473969 | 986 | |
d2c8eed2 LP |
987 | /* RFC 4861, Section 6.2.1 */ |
988 | .opt.flags = ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO, | |
204f99d2 | 989 | |
d951507d YW |
990 | .lifetime_valid_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
991 | .lifetime_preferred_usec = RADV_DEFAULT_PREFERRED_LIFETIME_USEC, | |
95e104e0 YW |
992 | .valid_until = USEC_INFINITY, |
993 | .preferred_until = USEC_INFINITY, | |
d2c8eed2 | 994 | }; |
04473969 | 995 | |
d2c8eed2 | 996 | *ret = p; |
04473969 PF |
997 | return 0; |
998 | } | |
999 | ||
8301aa0b | 1000 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_prefix, sd_radv_prefix, mfree); |
04473969 | 1001 | |
faaf3d66 YW |
1002 | int sd_radv_prefix_set_prefix( |
1003 | sd_radv_prefix *p, | |
1004 | const struct in6_addr *in6_addr, | |
1005 | unsigned char prefixlen) { | |
1006 | ||
04473969 PF |
1007 | assert_return(p, -EINVAL); |
1008 | assert_return(in6_addr, -EINVAL); | |
1009 | ||
1010 | if (prefixlen < 3 || prefixlen > 128) | |
1011 | return -EINVAL; | |
1012 | ||
1013 | if (prefixlen > 64) | |
1014 | /* unusual but allowed, log it */ | |
35388783 | 1015 | log_radv(NULL, "Unusual prefix length %d greater than 64", prefixlen); |
04473969 PF |
1016 | |
1017 | p->opt.in6_addr = *in6_addr; | |
1018 | p->opt.prefixlen = prefixlen; | |
1019 | ||
1020 | return 0; | |
1021 | } | |
1022 | ||
faaf3d66 YW |
1023 | int sd_radv_prefix_get_prefix( |
1024 | sd_radv_prefix *p, | |
1025 | struct in6_addr *ret_in6_addr, | |
1026 | unsigned char *ret_prefixlen) { | |
1027 | ||
34332af2 SS |
1028 | assert_return(p, -EINVAL); |
1029 | assert_return(ret_in6_addr, -EINVAL); | |
1030 | assert_return(ret_prefixlen, -EINVAL); | |
1031 | ||
1032 | *ret_in6_addr = p->opt.in6_addr; | |
1033 | *ret_prefixlen = p->opt.prefixlen; | |
1034 | ||
1035 | return 0; | |
1036 | } | |
1037 | ||
17347053 | 1038 | int sd_radv_prefix_set_onlink(sd_radv_prefix *p, int onlink) { |
04473969 PF |
1039 | assert_return(p, -EINVAL); |
1040 | ||
1041 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, onlink); | |
1042 | ||
1043 | return 0; | |
1044 | } | |
1045 | ||
faaf3d66 | 1046 | int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix *p, int address_autoconfiguration) { |
04473969 PF |
1047 | assert_return(p, -EINVAL); |
1048 | ||
1049 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, address_autoconfiguration); | |
1050 | ||
1051 | return 0; | |
1052 | } | |
1053 | ||
17347053 | 1054 | int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
1055 | assert_return(p, -EINVAL); |
1056 | ||
95e104e0 YW |
1057 | p->lifetime_valid_usec = lifetime_usec; |
1058 | p->valid_until = valid_until; | |
04473969 PF |
1059 | |
1060 | return 0; | |
1061 | } | |
1062 | ||
17347053 | 1063 | int sd_radv_prefix_set_preferred_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
1064 | assert_return(p, -EINVAL); |
1065 | ||
95e104e0 YW |
1066 | p->lifetime_preferred_usec = lifetime_usec; |
1067 | p->preferred_until = valid_until; | |
04473969 PF |
1068 | |
1069 | return 0; | |
1070 | } | |
203d4df5 | 1071 | |
17347053 | 1072 | int sd_radv_route_prefix_new(sd_radv_route_prefix **ret) { |
203d4df5 SS |
1073 | sd_radv_route_prefix *p; |
1074 | ||
1075 | assert_return(ret, -EINVAL); | |
1076 | ||
1077 | p = new(sd_radv_route_prefix, 1); | |
1078 | if (!p) | |
1079 | return -ENOMEM; | |
1080 | ||
1081 | *p = (sd_radv_route_prefix) { | |
1082 | .n_ref = 1, | |
1083 | ||
d6fc0d67 | 1084 | .opt.type = RADV_OPT_ROUTE_INFORMATION, |
203d4df5 SS |
1085 | .opt.length = DIV_ROUND_UP(sizeof(p->opt), 8), |
1086 | .opt.prefixlen = 64, | |
1087 | ||
d951507d | 1088 | .lifetime_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
95e104e0 | 1089 | .valid_until = USEC_INFINITY, |
203d4df5 SS |
1090 | }; |
1091 | ||
1092 | *ret = p; | |
1093 | return 0; | |
1094 | } | |
1095 | ||
1096 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_route_prefix, sd_radv_route_prefix, mfree); | |
1097 | ||
faaf3d66 YW |
1098 | int sd_radv_route_prefix_set_prefix( |
1099 | sd_radv_route_prefix *p, | |
1100 | const struct in6_addr *in6_addr, | |
1101 | unsigned char prefixlen) { | |
1102 | ||
203d4df5 SS |
1103 | assert_return(p, -EINVAL); |
1104 | assert_return(in6_addr, -EINVAL); | |
1105 | ||
1106 | if (prefixlen > 128) | |
1107 | return -EINVAL; | |
1108 | ||
1109 | if (prefixlen > 64) | |
1110 | /* unusual but allowed, log it */ | |
35388783 | 1111 | log_radv(NULL, "Unusual prefix length %u greater than 64", prefixlen); |
203d4df5 SS |
1112 | |
1113 | p->opt.in6_addr = *in6_addr; | |
1114 | p->opt.prefixlen = prefixlen; | |
1115 | ||
1116 | return 0; | |
1117 | } | |
1118 | ||
17347053 | 1119 | int sd_radv_route_prefix_set_lifetime(sd_radv_route_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
203d4df5 SS |
1120 | assert_return(p, -EINVAL); |
1121 | ||
95e104e0 YW |
1122 | p->lifetime_usec = lifetime_usec; |
1123 | p->valid_until = valid_until; | |
203d4df5 SS |
1124 | |
1125 | return 0; | |
1126 | } | |
1925f829 SS |
1127 | |
1128 | int sd_radv_pref64_prefix_new(sd_radv_pref64_prefix **ret) { | |
1129 | sd_radv_pref64_prefix *p; | |
1130 | ||
1131 | assert_return(ret, -EINVAL); | |
1132 | ||
1133 | p = new(sd_radv_pref64_prefix, 1); | |
1134 | if (!p) | |
1135 | return -ENOMEM; | |
1136 | ||
1137 | *p = (sd_radv_pref64_prefix) { | |
1138 | .n_ref = 1, | |
1139 | ||
1140 | .opt.type = RADV_OPT_PREF64, | |
1141 | .opt.length = 2, | |
1142 | }; | |
1143 | ||
1144 | *ret = p; | |
1145 | return 0; | |
1146 | } | |
1147 | ||
1148 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_pref64_prefix, sd_radv_pref64_prefix, mfree); | |
1149 | ||
1150 | int sd_radv_pref64_prefix_set_prefix( | |
1151 | sd_radv_pref64_prefix *p, | |
1152 | const struct in6_addr *prefix, | |
1153 | uint8_t prefixlen, | |
1154 | uint64_t lifetime_usec) { | |
1155 | ||
1156 | uint16_t pref64_lifetime; | |
1157 | uint8_t prefixlen_code; | |
6e8f5e4c | 1158 | int r; |
1925f829 SS |
1159 | |
1160 | assert_return(p, -EINVAL); | |
1161 | assert_return(prefix, -EINVAL); | |
1162 | ||
6e8f5e4c SS |
1163 | r = pref64_prefix_length_to_plc(prefixlen, &prefixlen_code); |
1164 | if (r < 0) | |
f31fa080 ZJS |
1165 | return log_radv_errno(NULL, r, |
1166 | "Unsupported PREF64 prefix length %u. Valid lengths are 32, 40, 48, 56, 64 and 96", prefixlen); | |
1925f829 | 1167 | |
eca280c8 | 1168 | if (lifetime_usec > PREF64_MAX_LIFETIME_USEC) |
1925f829 SS |
1169 | return -EINVAL; |
1170 | ||
1171 | /* RFC 8781 - 4.1 rounding up lifetime to multiply of 8 */ | |
1172 | pref64_lifetime = DIV_ROUND_UP(lifetime_usec, 8 * USEC_PER_SEC) << 3; | |
1173 | pref64_lifetime |= prefixlen_code; | |
1174 | ||
1175 | unaligned_write_be16(&p->opt.lifetime_and_plc, pref64_lifetime); | |
1176 | memcpy(&p->opt.prefix, prefix, sizeof(p->opt.prefix)); | |
1177 | ||
1178 | p->in6_addr = *prefix; | |
1179 | p->prefixlen = prefixlen; | |
1180 | ||
1181 | return 0; | |
1182 | } |