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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 | ||
19f3cc86 YW |
132 | static int radv_send_router_on_stop(sd_radv *ra) { |
133 | static const struct nd_router_advert adv = { | |
134 | .nd_ra_type = ND_ROUTER_ADVERT, | |
135 | }; | |
136 | ||
137 | _cleanup_set_free_ Set *options = NULL; | |
138 | usec_t time_now; | |
139 | int r; | |
140 | ||
141 | assert(ra); | |
142 | ||
143 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); | |
144 | if (r < 0) | |
145 | return r; | |
146 | ||
147 | if (!ether_addr_is_null(&ra->mac_addr)) { | |
148 | r = ndisc_option_set_link_layer_address(&options, SD_NDISC_OPTION_SOURCE_LL_ADDRESS, &ra->mac_addr); | |
149 | if (r < 0) | |
150 | return r; | |
151 | } | |
152 | ||
153 | return ndisc_send(ra->fd, &IN6_ADDR_ALL_NODES_MULTICAST, &adv.nd_ra_hdr, options, time_now); | |
154 | } | |
155 | ||
69628e3b | 156 | static int radv_send_router(sd_radv *ra, const struct in6_addr *dst) { |
36653443 | 157 | assert(ra); |
36653443 | 158 | |
77baf5ae PF |
159 | struct sockaddr_in6 dst_addr = { |
160 | .sin6_family = AF_INET6, | |
2c28eb02 | 161 | .sin6_addr = IN6_ADDR_ALL_NODES_MULTICAST, |
77baf5ae | 162 | }; |
36653443 YW |
163 | struct nd_router_advert adv = { |
164 | .nd_ra_type = ND_ROUTER_ADVERT, | |
69628e3b | 165 | .nd_ra_router_lifetime = usec_to_be16_sec(ra->lifetime_usec), |
36653443 YW |
166 | .nd_ra_retransmit = usec_to_be32_msec(ra->retransmit_usec), |
167 | }; | |
77baf5ae PF |
168 | struct { |
169 | struct nd_opt_hdr opthdr; | |
170 | struct ether_addr slladdr; | |
171 | } _packed_ opt_mac = { | |
172 | .opthdr = { | |
173 | .nd_opt_type = ND_OPT_SOURCE_LINKADDR, | |
36653443 | 174 | .nd_opt_len = DIV_ROUND_UP(sizeof(struct nd_opt_hdr) + sizeof(struct ether_addr), 8), |
77baf5ae | 175 | }, |
36653443 | 176 | .slladdr = ra->mac_addr, |
77baf5ae PF |
177 | }; |
178 | struct nd_opt_mtu opt_mtu = { | |
179 | .nd_opt_mtu_type = ND_OPT_MTU, | |
180 | .nd_opt_mtu_len = 1, | |
36653443 | 181 | .nd_opt_mtu_mtu = htobe32(ra->mtu), |
77baf5ae | 182 | }; |
ac63c8df YW |
183 | /* Reserve iov space for RA header, linkaddr, MTU, N prefixes, N routes, N pref64 prefixes, RDNSS, |
184 | * DNSSL, and home agent. */ | |
185 | struct iovec iov[6 + ra->n_prefixes + ra->n_route_prefixes + ra->n_pref64_prefixes]; | |
77baf5ae PF |
186 | struct msghdr msg = { |
187 | .msg_name = &dst_addr, | |
188 | .msg_namelen = sizeof(dst_addr), | |
189 | .msg_iov = iov, | |
190 | }; | |
d601b566 PF |
191 | usec_t time_now; |
192 | int r; | |
193 | ||
ba4e0427 | 194 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
d601b566 PF |
195 | if (r < 0) |
196 | return r; | |
77baf5ae | 197 | |
94876904 | 198 | if (dst && in6_addr_is_set(dst)) |
77baf5ae | 199 | dst_addr.sin6_addr = *dst; |
88d5a3db | 200 | |
36653443 YW |
201 | /* The nd_ra_curhoplimit and nd_ra_flags_reserved fields cannot specified with nd_ra_router_lifetime |
202 | * simultaneously in the structured initializer in the above. */ | |
77baf5ae | 203 | adv.nd_ra_curhoplimit = ra->hop_limit; |
ba5dc3af YW |
204 | /* RFC 4191, Section 2.2, |
205 | * "...If the Router Lifetime is zero, the preference value MUST be set to (00) by the sender..." */ | |
206 | adv.nd_ra_flags_reserved = ra->flags | (ra->lifetime_usec > 0 ? (ra->preference << 3) : 0); | |
5cfa2c3d | 207 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&adv, sizeof(adv)); |
77baf5ae | 208 | |
36653443 YW |
209 | /* MAC address is optional, either because the link does not use L2 addresses or load sharing is |
210 | * desired. See RFC 4861, Section 4.2. */ | |
211 | if (!ether_addr_is_null(&ra->mac_addr)) | |
5cfa2c3d | 212 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mac, sizeof(opt_mac)); |
77baf5ae | 213 | |
36653443 | 214 | if (ra->mtu > 0) |
5cfa2c3d | 215 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mtu, sizeof(opt_mtu)); |
77baf5ae PF |
216 | |
217 | LIST_FOREACH(prefix, p, ra->prefixes) { | |
95e104e0 | 218 | usec_t lifetime_valid_usec, lifetime_preferred_usec; |
d601b566 | 219 | |
95e104e0 YW |
220 | lifetime_valid_usec = MIN(usec_sub_unsigned(p->valid_until, time_now), |
221 | p->lifetime_valid_usec); | |
222 | ||
223 | lifetime_preferred_usec = MIN3(usec_sub_unsigned(p->preferred_until, time_now), | |
224 | p->lifetime_preferred_usec, | |
225 | lifetime_valid_usec); | |
226 | ||
227 | p->opt.lifetime_valid = usec_to_be32_sec(lifetime_valid_usec); | |
228 | p->opt.lifetime_preferred = usec_to_be32_sec(lifetime_preferred_usec); | |
d601b566 | 229 | |
5cfa2c3d | 230 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&p->opt, sizeof(p->opt)); |
77baf5ae PF |
231 | } |
232 | ||
95e104e0 YW |
233 | LIST_FOREACH(prefix, rt, ra->route_prefixes) { |
234 | rt->opt.lifetime = usec_to_be32_sec(MIN(usec_sub_unsigned(rt->valid_until, time_now), | |
235 | rt->lifetime_usec)); | |
236 | ||
203d4df5 | 237 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&rt->opt, sizeof(rt->opt)); |
95e104e0 | 238 | } |
203d4df5 | 239 | |
1925f829 SS |
240 | LIST_FOREACH(prefix, p, ra->pref64_prefixes) |
241 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&p->opt, sizeof(p->opt)); | |
242 | ||
5cfa2c3d LP |
243 | if (ra->rdnss) |
244 | iov[msg.msg_iovlen++] = IOVEC_MAKE(ra->rdnss, ra->rdnss->length * 8); | |
e9c6da38 | 245 | |
5cfa2c3d LP |
246 | if (ra->dnssl) |
247 | iov[msg.msg_iovlen++] = IOVEC_MAKE(ra->dnssl, ra->dnssl->length * 8); | |
e965d6ab | 248 | |
6a6d27bc SS |
249 | if (FLAGS_SET(ra->flags, ND_RA_FLAG_HOME_AGENT)) { |
250 | ra->home_agent.nd_opt_home_agent_info_type = ND_OPT_HOME_AGENT_INFO; | |
251 | ra->home_agent.nd_opt_home_agent_info_len = 1; | |
252 | ||
253 | /* 0 means to place the current Router Lifetime value */ | |
254 | if (ra->home_agent.nd_opt_home_agent_info_lifetime == 0) | |
255 | ra->home_agent.nd_opt_home_agent_info_lifetime = adv.nd_ra_router_lifetime; | |
256 | ||
257 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&ra->home_agent, sizeof(ra->home_agent)); | |
258 | } | |
259 | ||
77baf5ae PF |
260 | if (sendmsg(ra->fd, &msg, 0) < 0) |
261 | return -errno; | |
204fb681 | 262 | |
77baf5ae | 263 | return 0; |
204fb681 PF |
264 | } |
265 | ||
cc2bcbf6 | 266 | static int radv_process_packet(sd_radv *ra, ICMP6Packet *packet) { |
88d5a3db | 267 | int r; |
88d5a3db | 268 | |
cc2bcbf6 YW |
269 | assert(ra); |
270 | assert(packet); | |
88d5a3db | 271 | |
cc2bcbf6 YW |
272 | if (icmp6_packet_get_type(packet) != ND_ROUTER_SOLICIT) |
273 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EBADMSG), "Received ICMP6 packet with unexpected type, ignoring."); | |
88d5a3db | 274 | |
cc2bcbf6 YW |
275 | _cleanup_(sd_ndisc_router_solicit_unrefp) sd_ndisc_router_solicit *rs = NULL; |
276 | rs = ndisc_router_solicit_new(packet); | |
277 | if (!rs) | |
278 | return log_oom_debug(); | |
88d5a3db | 279 | |
cc2bcbf6 | 280 | r = ndisc_router_solicit_parse(ra, rs); |
1f2db2e3 | 281 | if (r < 0) |
cc2bcbf6 | 282 | return r; |
88d5a3db | 283 | |
cc2bcbf6 YW |
284 | struct in6_addr src = {}; |
285 | r = sd_ndisc_router_solicit_get_sender_address(rs, &src); | |
286 | if (r < 0 && r != -ENODATA) /* null address is allowed */ | |
287 | return log_radv_errno(ra, r, "Failed to get sender address of RS, ignoring: %m"); | |
50ba4e40 YW |
288 | if (r >= 0 && in6_addr_equal(&src, &ra->ipv6ll)) |
289 | /* This should be definitely caused by a misconfiguration. If we send RA to ourself, the | |
290 | * kernel complains about that. Let's ignore the packet. */ | |
291 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EADDRINUSE), "Received RS from the same interface, ignoring."); | |
88d5a3db | 292 | |
69628e3b | 293 | r = radv_send_router(ra, &src); |
cc2bcbf6 YW |
294 | if (r < 0) |
295 | return log_radv_errno(ra, r, "Unable to send solicited Router Advertisement to %s, ignoring: %m", IN6_ADDR_TO_STRING(&src)); | |
88d5a3db | 296 | |
cc2bcbf6 YW |
297 | log_radv(ra, "Sent solicited Router Advertisement to %s.", IN6_ADDR_TO_STRING(&src)); |
298 | return 0; | |
299 | } | |
88d5a3db | 300 | |
cc2bcbf6 YW |
301 | static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
302 | _cleanup_(icmp6_packet_unrefp) ICMP6Packet *packet = NULL; | |
303 | sd_radv *ra = ASSERT_PTR(userdata); | |
304 | int r; | |
cfffddea | 305 | |
cc2bcbf6 | 306 | assert(fd >= 0); |
4961f566 | 307 | |
cc2bcbf6 YW |
308 | r = icmp6_packet_receive(fd, &packet); |
309 | if (r < 0) { | |
310 | log_radv_errno(ra, r, "Failed to receive ICMPv6 packet, ignoring: %m"); | |
311 | return 0; | |
312 | } | |
88d5a3db | 313 | |
cc2bcbf6 | 314 | (void) radv_process_packet(ra, packet); |
88d5a3db PF |
315 | return 0; |
316 | } | |
317 | ||
204fb681 | 318 | static int radv_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
7003b114 | 319 | usec_t min_timeout, max_timeout, time_now, timeout; |
99534007 | 320 | sd_radv *ra = ASSERT_PTR(userdata); |
7003b114 | 321 | int r; |
204fb681 PF |
322 | |
323 | assert(s); | |
204fb681 | 324 | assert(ra->event); |
80477557 | 325 | assert(router_lifetime_is_valid(ra->lifetime_usec)); |
204fb681 | 326 | |
ba4e0427 | 327 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
204fb681 PF |
328 | if (r < 0) |
329 | goto fail; | |
330 | ||
69628e3b | 331 | r = radv_send_router(ra, NULL); |
204fb681 | 332 | if (r < 0) |
abb977a6 | 333 | log_radv_errno(ra, r, "Unable to send Router Advertisement, ignoring: %m"); |
204fb681 PF |
334 | |
335 | /* RFC 4861, Section 6.2.4, sending initial Router Advertisements */ | |
80477557 | 336 | if (ra->ra_sent < RADV_MAX_INITIAL_RTR_ADVERTISEMENTS) |
d6fc0d67 | 337 | max_timeout = RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC; |
80477557 | 338 | else |
03ec10fd | 339 | max_timeout = RADV_DEFAULT_MAX_TIMEOUT_USEC; |
204fb681 | 340 | |
ef90b6a4 | 341 | /* RFC 4861, Section 6.2.1, lifetime must be at least MaxRtrAdvInterval, |
80477557 YW |
342 | * so lower the interval here */ |
343 | if (ra->lifetime_usec > 0) | |
344 | max_timeout = MIN(max_timeout, ra->lifetime_usec); | |
345 | ||
346 | if (max_timeout >= 9 * USEC_PER_SEC) | |
ef90b6a4 | 347 | min_timeout = max_timeout / 3; |
80477557 YW |
348 | else |
349 | min_timeout = max_timeout * 3 / 4; | |
ef90b6a4 | 350 | |
80477557 YW |
351 | /* RFC 4861, Section 6.2.1. |
352 | * MaxRtrAdvInterval MUST be no less than 4 seconds and no greater than 1800 seconds. | |
353 | * MinRtrAdvInterval MUST be no less than 3 seconds and no greater than .75 * MaxRtrAdvInterval. */ | |
354 | assert(max_timeout >= RADV_MIN_MAX_TIMEOUT_USEC); | |
355 | assert(max_timeout <= RADV_MAX_MAX_TIMEOUT_USEC); | |
356 | assert(min_timeout >= RADV_MIN_MIN_TIMEOUT_USEC); | |
357 | assert(min_timeout <= max_timeout * 3 / 4); | |
ef90b6a4 | 358 | |
80477557 | 359 | timeout = min_timeout + random_u64_range(max_timeout - min_timeout); |
5291f26d | 360 | log_radv(ra, "Next Router Advertisement in %s", FORMAT_TIMESPAN(timeout, USEC_PER_SEC)); |
204fb681 | 361 | |
807a8ede | 362 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 363 | CLOCK_BOOTTIME, |
80477557 | 364 | usec_add(time_now, timeout), MSEC_PER_SEC, |
807a8ede YW |
365 | radv_timeout, ra, |
366 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
367 | if (r < 0) |
368 | goto fail; | |
369 | ||
370 | ra->ra_sent++; | |
371 | ||
807a8ede YW |
372 | return 0; |
373 | ||
204fb681 | 374 | fail: |
290696e5 | 375 | sd_radv_stop(ra); |
204fb681 PF |
376 | |
377 | return 0; | |
378 | } | |
379 | ||
17347053 | 380 | int sd_radv_stop(sd_radv *ra) { |
204fb681 PF |
381 | int r; |
382 | ||
c8bae363 YW |
383 | if (!ra) |
384 | return 0; | |
204f99d2 | 385 | |
d6fc0d67 | 386 | if (ra->state == RADV_STATE_IDLE) |
6f8a8b84 SS |
387 | return 0; |
388 | ||
35388783 | 389 | log_radv(ra, "Stopping IPv6 Router Advertisement daemon"); |
204f99d2 | 390 | |
36653443 YW |
391 | /* RFC 4861, Section 6.2.5: |
392 | * the router SHOULD transmit one or more (but not more than MAX_FINAL_RTR_ADVERTISEMENTS) final | |
393 | * multicast Router Advertisements on the interface with a Router Lifetime field of zero. */ | |
19f3cc86 | 394 | r = radv_send_router_on_stop(ra); |
290696e5 | 395 | if (r < 0) |
abb977a6 | 396 | log_radv_errno(ra, r, "Unable to send last Router Advertisement with router lifetime set to zero, ignoring: %m"); |
204fb681 PF |
397 | |
398 | radv_reset(ra); | |
77baf5ae | 399 | ra->fd = safe_close(ra->fd); |
d6fc0d67 | 400 | ra->state = RADV_STATE_IDLE; |
204f99d2 PF |
401 | |
402 | return 0; | |
403 | } | |
404 | ||
36653443 YW |
405 | static int radv_setup_recv_event(sd_radv *ra) { |
406 | int r; | |
407 | ||
408 | assert(ra); | |
409 | assert(ra->event); | |
410 | assert(ra->ifindex > 0); | |
411 | ||
412 | _cleanup_close_ int fd = -EBADF; | |
413 | fd = icmp6_bind(ra->ifindex, /* is_router = */ true); | |
414 | if (fd < 0) | |
415 | return fd; | |
416 | ||
417 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
418 | r = sd_event_add_io(ra->event, &s, fd, EPOLLIN, radv_recv, ra); | |
419 | if (r < 0) | |
420 | return r; | |
421 | ||
422 | r = sd_event_source_set_priority(s, ra->event_priority); | |
423 | if (r < 0) | |
424 | return r; | |
425 | ||
426 | (void) sd_event_source_set_description(s, "radv-receive-message"); | |
427 | ||
428 | ra->fd = TAKE_FD(fd); | |
429 | ra->recv_event_source = TAKE_PTR(s); | |
430 | return 0; | |
431 | } | |
432 | ||
17347053 | 433 | int sd_radv_start(sd_radv *ra) { |
f474884c | 434 | int r; |
204fb681 | 435 | |
204f99d2 PF |
436 | assert_return(ra, -EINVAL); |
437 | assert_return(ra->event, -EINVAL); | |
438 | assert_return(ra->ifindex > 0, -EINVAL); | |
439 | ||
d6fc0d67 | 440 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
441 | return 0; |
442 | ||
36653443 YW |
443 | r = radv_setup_recv_event(ra); |
444 | if (r < 0) | |
445 | goto fail; | |
446 | ||
807a8ede | 447 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 448 | CLOCK_BOOTTIME, |
807a8ede YW |
449 | 0, 0, |
450 | radv_timeout, ra, | |
451 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
452 | if (r < 0) |
453 | goto fail; | |
454 | ||
d6fc0d67 | 455 | ra->state = RADV_STATE_ADVERTISING; |
204f99d2 | 456 | |
35388783 | 457 | log_radv(ra, "Started IPv6 Router Advertisement daemon"); |
204f99d2 PF |
458 | |
459 | return 0; | |
204fb681 PF |
460 | |
461 | fail: | |
462 | radv_reset(ra); | |
463 | ||
464 | return r; | |
204f99d2 PF |
465 | } |
466 | ||
17347053 | 467 | int sd_radv_set_ifindex(sd_radv *ra, int ifindex) { |
204f99d2 | 468 | assert_return(ra, -EINVAL); |
7fa69c0a | 469 | assert_return(ifindex > 0, -EINVAL); |
204f99d2 | 470 | |
d6fc0d67 | 471 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
472 | return -EBUSY; |
473 | ||
474 | ra->ifindex = ifindex; | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
61a9fa8f YW |
479 | int sd_radv_set_ifname(sd_radv *ra, const char *ifname) { |
480 | assert_return(ra, -EINVAL); | |
481 | assert_return(ifname, -EINVAL); | |
482 | ||
483 | if (!ifname_valid_full(ifname, IFNAME_VALID_ALTERNATIVE)) | |
484 | return -EINVAL; | |
485 | ||
486 | return free_and_strdup(&ra->ifname, ifname); | |
487 | } | |
488 | ||
5977b71f YW |
489 | int sd_radv_get_ifname(sd_radv *ra, const char **ret) { |
490 | int r; | |
491 | ||
492 | assert_return(ra, -EINVAL); | |
61a9fa8f | 493 | |
5977b71f YW |
494 | r = get_ifname(ra->ifindex, &ra->ifname); |
495 | if (r < 0) | |
496 | return r; | |
497 | ||
498 | if (ret) | |
499 | *ret = ra->ifname; | |
500 | ||
501 | return 0; | |
61a9fa8f YW |
502 | } |
503 | ||
50ba4e40 YW |
504 | int sd_radv_set_link_local_address(sd_radv *ra, const struct in6_addr *addr) { |
505 | assert_return(ra, -EINVAL); | |
506 | assert_return(!addr || in6_addr_is_link_local(addr), -EINVAL); | |
507 | ||
508 | if (addr) | |
509 | ra->ipv6ll = *addr; | |
510 | else | |
511 | zero(ra->ipv6ll); | |
512 | ||
513 | return 0; | |
514 | } | |
515 | ||
17347053 | 516 | int sd_radv_set_mac(sd_radv *ra, const struct ether_addr *mac_addr) { |
204f99d2 PF |
517 | assert_return(ra, -EINVAL); |
518 | ||
d6fc0d67 | 519 | if (ra->state != RADV_STATE_IDLE) |
204f99d2 PF |
520 | return -EBUSY; |
521 | ||
522 | if (mac_addr) | |
523 | ra->mac_addr = *mac_addr; | |
524 | else | |
525 | zero(ra->mac_addr); | |
526 | ||
527 | return 0; | |
528 | } | |
529 | ||
17347053 | 530 | int sd_radv_set_mtu(sd_radv *ra, uint32_t mtu) { |
204f99d2 PF |
531 | assert_return(ra, -EINVAL); |
532 | assert_return(mtu >= 1280, -EINVAL); | |
533 | ||
204f99d2 PF |
534 | ra->mtu = mtu; |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
17347053 | 539 | int sd_radv_set_hop_limit(sd_radv *ra, uint8_t hop_limit) { |
204f99d2 PF |
540 | assert_return(ra, -EINVAL); |
541 | ||
204f99d2 | 542 | ra->hop_limit = hop_limit; |
204f99d2 PF |
543 | return 0; |
544 | } | |
545 | ||
eca280c8 | 546 | int sd_radv_set_retransmit(sd_radv *ra, uint64_t usec) { |
fdc4c67c SS |
547 | assert_return(ra, -EINVAL); |
548 | ||
eca280c8 | 549 | ra->retransmit_usec = usec; |
fdc4c67c SS |
550 | return 0; |
551 | } | |
552 | ||
eca280c8 | 553 | int sd_radv_set_router_lifetime(sd_radv *ra, uint64_t usec) { |
204f99d2 PF |
554 | assert_return(ra, -EINVAL); |
555 | ||
eca280c8 | 556 | if (!router_lifetime_is_valid(usec)) |
09457670 YW |
557 | return -EINVAL; |
558 | ||
eca280c8 | 559 | ra->lifetime_usec = usec; |
204f99d2 PF |
560 | return 0; |
561 | } | |
562 | ||
03401969 | 563 | int sd_radv_set_managed_information(sd_radv *ra, int b) { |
204f99d2 PF |
564 | assert_return(ra, -EINVAL); |
565 | ||
03401969 | 566 | SET_FLAG(ra->flags, ND_RA_FLAG_MANAGED, b); |
204f99d2 PF |
567 | return 0; |
568 | } | |
569 | ||
03401969 | 570 | int sd_radv_set_other_information(sd_radv *ra, int b) { |
204f99d2 PF |
571 | assert_return(ra, -EINVAL); |
572 | ||
03401969 | 573 | SET_FLAG(ra->flags, ND_RA_FLAG_OTHER, b); |
204f99d2 PF |
574 | return 0; |
575 | } | |
576 | ||
ba5dc3af | 577 | int sd_radv_set_preference(sd_radv *ra, uint8_t preference) { |
204f99d2 PF |
578 | assert_return(ra, -EINVAL); |
579 | assert_return(IN_SET(preference, | |
580 | SD_NDISC_PREFERENCE_LOW, | |
581 | SD_NDISC_PREFERENCE_MEDIUM, | |
582 | SD_NDISC_PREFERENCE_HIGH), -EINVAL); | |
583 | ||
ba5dc3af | 584 | ra->preference = preference; |
dd1b1870 | 585 | return 0; |
204f99d2 PF |
586 | } |
587 | ||
6a6d27bc SS |
588 | int sd_radv_set_home_agent_information(sd_radv *ra, int home_agent) { |
589 | assert_return(ra, -EINVAL); | |
590 | ||
591 | if (ra->state != RADV_STATE_IDLE) | |
592 | return -EBUSY; | |
593 | ||
594 | SET_FLAG(ra->flags, ND_RA_FLAG_HOME_AGENT, home_agent); | |
595 | ||
596 | return 0; | |
597 | } | |
598 | ||
599 | int sd_radv_set_home_agent_preference(sd_radv *ra, uint16_t preference) { | |
600 | assert_return(ra, -EINVAL); | |
601 | ||
602 | if (ra->state != RADV_STATE_IDLE) | |
603 | return -EBUSY; | |
604 | ||
605 | ra->home_agent.nd_opt_home_agent_info_preference = htobe16(preference); | |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
eca280c8 | 610 | int sd_radv_set_home_agent_lifetime(sd_radv *ra, uint64_t lifetime_usec) { |
6a6d27bc SS |
611 | assert_return(ra, -EINVAL); |
612 | ||
613 | if (ra->state != RADV_STATE_IDLE) | |
614 | return -EBUSY; | |
615 | ||
eca280c8 YW |
616 | if (lifetime_usec > RADV_HOME_AGENT_MAX_LIFETIME_USEC) |
617 | return -EINVAL; | |
6a6d27bc | 618 | |
eca280c8 | 619 | ra->home_agent.nd_opt_home_agent_info_lifetime = usec_to_be16_sec(lifetime_usec); |
6a6d27bc SS |
620 | return 0; |
621 | } | |
622 | ||
17347053 | 623 | int sd_radv_add_prefix(sd_radv *ra, sd_radv_prefix *p) { |
03677889 | 624 | sd_radv_prefix *found = NULL; |
d601b566 | 625 | int r; |
204f99d2 PF |
626 | |
627 | assert_return(ra, -EINVAL); | |
acbb5500 | 628 | assert_return(p, -EINVAL); |
204f99d2 | 629 | |
59ea6e57 | 630 | /* Refuse prefixes that don't have a prefix set */ |
94876904 | 631 | if (in6_addr_is_null(&p->opt.in6_addr)) |
59ea6e57 LP |
632 | return -ENOEXEC; |
633 | ||
c71384a9 | 634 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
5380707a | 635 | |
204f99d2 | 636 | LIST_FOREACH(prefix, cur, ra->prefixes) { |
204f99d2 | 637 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 638 | (const union in_addr_union*) &cur->opt.in6_addr, |
204f99d2 | 639 | cur->opt.prefixlen, |
c633628d | 640 | (const union in_addr_union*) &p->opt.in6_addr, |
204f99d2 | 641 | p->opt.prefixlen); |
5380707a YW |
642 | if (r < 0) |
643 | return r; | |
644 | if (r == 0) | |
645 | continue; | |
204f99d2 | 646 | |
95e104e0 | 647 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 648 | found = cur; |
b9f27a05 | 649 | break; |
95e104e0 | 650 | } |
d601b566 | 651 | |
35388783 | 652 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 653 | "IPv6 prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
654 | addr_p, |
655 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
204f99d2 PF |
656 | } |
657 | ||
56aa5143 | 658 | if (found) { |
b9f27a05 YW |
659 | /* p and cur may be equivalent. First increment the reference counter. */ |
660 | sd_radv_prefix_ref(p); | |
661 | ||
662 | /* Then, remove the old entry. */ | |
56aa5143 YW |
663 | LIST_REMOVE(prefix, ra->prefixes, found); |
664 | sd_radv_prefix_unref(found); | |
b9f27a05 YW |
665 | |
666 | /* Finally, add the new entry. */ | |
667 | LIST_APPEND(prefix, ra->prefixes, p); | |
668 | ||
669 | log_radv(ra, "Updated/replaced IPv6 prefix %s (preferred: %s, valid: %s)", | |
c71384a9 | 670 | addr_p, |
b9f27a05 YW |
671 | FORMAT_TIMESPAN(p->lifetime_preferred_usec, USEC_PER_SEC), |
672 | FORMAT_TIMESPAN(p->lifetime_valid_usec, USEC_PER_SEC)); | |
673 | } else { | |
674 | /* The prefix is new. Let's simply add it. */ | |
675 | ||
676 | sd_radv_prefix_ref(p); | |
677 | LIST_APPEND(prefix, ra->prefixes, p); | |
678 | ra->n_prefixes++; | |
204f99d2 | 679 | |
c71384a9 | 680 | log_radv(ra, "Added prefix %s", addr_p); |
b9f27a05 | 681 | } |
059d7b6e YW |
682 | |
683 | if (ra->state == RADV_STATE_IDLE) | |
684 | return 0; | |
685 | ||
059d7b6e | 686 | if (ra->ra_sent == 0) |
d601b566 | 687 | return 0; |
d601b566 | 688 | |
97efde65 | 689 | /* If RAs have already been sent, send an RA immediately to announce the newly-added prefix */ |
69628e3b | 690 | r = radv_send_router(ra, NULL); |
059d7b6e | 691 | if (r < 0) |
abb977a6 | 692 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added prefix %s, ignoring: %m", addr_p); |
059d7b6e | 693 | else |
c71384a9 | 694 | log_radv(ra, "Sent Router Advertisement for added/updated prefix %s.", addr_p); |
97efde65 | 695 | |
204f99d2 PF |
696 | return 0; |
697 | } | |
698 | ||
95931532 YW |
699 | void sd_radv_remove_prefix( |
700 | sd_radv *ra, | |
701 | const struct in6_addr *prefix, | |
702 | unsigned char prefixlen) { | |
34c169c4 | 703 | |
95931532 YW |
704 | if (!ra) |
705 | return; | |
34c169c4 | 706 | |
95931532 YW |
707 | if (!prefix) |
708 | return; | |
709 | ||
710 | LIST_FOREACH(prefix, cur, ra->prefixes) { | |
34c169c4 PF |
711 | if (prefixlen != cur->opt.prefixlen) |
712 | continue; | |
713 | ||
94876904 | 714 | if (!in6_addr_equal(prefix, &cur->opt.in6_addr)) |
34c169c4 PF |
715 | continue; |
716 | ||
717 | LIST_REMOVE(prefix, ra->prefixes, cur); | |
718 | ra->n_prefixes--; | |
62bbbedf | 719 | sd_radv_prefix_unref(cur); |
95931532 | 720 | return; |
34c169c4 | 721 | } |
34c169c4 PF |
722 | } |
723 | ||
17347053 | 724 | int sd_radv_add_route_prefix(sd_radv *ra, sd_radv_route_prefix *p) { |
03677889 | 725 | sd_radv_route_prefix *found = NULL; |
203d4df5 SS |
726 | int r; |
727 | ||
728 | assert_return(ra, -EINVAL); | |
acbb5500 | 729 | assert_return(p, -EINVAL); |
203d4df5 | 730 | |
c71384a9 | 731 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
203d4df5 SS |
732 | |
733 | LIST_FOREACH(prefix, cur, ra->route_prefixes) { | |
203d4df5 | 734 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 735 | (const union in_addr_union*) &cur->opt.in6_addr, |
203d4df5 | 736 | cur->opt.prefixlen, |
c633628d | 737 | (const union in_addr_union*) &p->opt.in6_addr, |
203d4df5 SS |
738 | p->opt.prefixlen); |
739 | if (r < 0) | |
740 | return r; | |
741 | if (r == 0) | |
742 | continue; | |
743 | ||
95e104e0 | 744 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 745 | found = cur; |
b9f27a05 | 746 | break; |
95e104e0 | 747 | } |
203d4df5 | 748 | |
35388783 | 749 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 750 | "IPv6 route prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
751 | addr_p, |
752 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
203d4df5 SS |
753 | } |
754 | ||
56aa5143 | 755 | if (found) { |
b9f27a05 YW |
756 | /* p and cur may be equivalent. First increment the reference counter. */ |
757 | sd_radv_route_prefix_ref(p); | |
758 | ||
759 | /* Then, remove the old entry. */ | |
56aa5143 YW |
760 | LIST_REMOVE(prefix, ra->route_prefixes, found); |
761 | sd_radv_route_prefix_unref(found); | |
b9f27a05 YW |
762 | |
763 | /* Finally, add the new entry. */ | |
764 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
765 | ||
766 | log_radv(ra, "Updated/replaced IPv6 route prefix %s (lifetime: %s)", | |
767 | strna(addr_p), | |
768 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
769 | } else { | |
770 | /* The route prefix is new. Let's simply add it. */ | |
771 | ||
772 | sd_radv_route_prefix_ref(p); | |
773 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
774 | ra->n_route_prefixes++; | |
775 | ||
776 | log_radv(ra, "Added route prefix %s", strna(addr_p)); | |
777 | } | |
059d7b6e YW |
778 | |
779 | if (ra->state == RADV_STATE_IDLE) | |
780 | return 0; | |
781 | ||
059d7b6e | 782 | if (ra->ra_sent == 0) |
203d4df5 | 783 | return 0; |
203d4df5 | 784 | |
97efde65 | 785 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ |
69628e3b | 786 | r = radv_send_router(ra, NULL); |
059d7b6e | 787 | if (r < 0) |
abb977a6 | 788 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added route prefix %s, ignoring: %m", |
b9f27a05 | 789 | strna(addr_p)); |
059d7b6e | 790 | else |
b9f27a05 | 791 | log_radv(ra, "Sent Router Advertisement for added route prefix %s.", strna(addr_p)); |
97efde65 | 792 | |
203d4df5 SS |
793 | return 0; |
794 | } | |
795 | ||
1925f829 SS |
796 | int sd_radv_add_pref64_prefix(sd_radv *ra, sd_radv_pref64_prefix *p) { |
797 | sd_radv_pref64_prefix *found = NULL; | |
798 | int r; | |
799 | ||
800 | assert_return(ra, -EINVAL); | |
801 | assert_return(p, -EINVAL); | |
802 | ||
803 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->in6_addr, p->prefixlen); | |
804 | ||
805 | LIST_FOREACH(prefix, cur, ra->pref64_prefixes) { | |
806 | r = in_addr_prefix_intersect(AF_INET6, | |
807 | (const union in_addr_union*) &cur->in6_addr, | |
808 | cur->prefixlen, | |
809 | (const union in_addr_union*) &p->in6_addr, | |
810 | p->prefixlen); | |
811 | if (r < 0) | |
812 | return r; | |
813 | if (r == 0) | |
814 | continue; | |
815 | ||
816 | if (cur->prefixlen == p->prefixlen) { | |
817 | found = cur; | |
818 | break; | |
819 | } | |
820 | ||
821 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), | |
822 | "IPv6 PREF64 prefix %s conflicts with %s, ignoring.", | |
823 | addr_p, | |
824 | IN6_ADDR_PREFIX_TO_STRING(&cur->in6_addr, cur->prefixlen)); | |
825 | } | |
826 | ||
827 | if (found) { | |
828 | /* p and cur may be equivalent. First increment the reference counter. */ | |
829 | sd_radv_pref64_prefix_ref(p); | |
830 | ||
831 | /* Then, remove the old entry. */ | |
832 | LIST_REMOVE(prefix, ra->pref64_prefixes, found); | |
833 | sd_radv_pref64_prefix_unref(found); | |
834 | ||
835 | /* Finally, add the new entry. */ | |
836 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
837 | ||
838 | log_radv(ra, "Updated/replaced IPv6 PREF64 prefix %s (lifetime: %s)", | |
839 | strna(addr_p), | |
840 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
841 | } else { | |
842 | /* The route prefix is new. Let's simply add it. */ | |
843 | ||
844 | sd_radv_pref64_prefix_ref(p); | |
845 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
846 | ra->n_pref64_prefixes++; | |
847 | ||
848 | log_radv(ra, "Added PREF64 prefix %s", strna(addr_p)); | |
849 | } | |
850 | ||
851 | if (ra->state == RADV_STATE_IDLE) | |
852 | return 0; | |
853 | ||
854 | if (ra->ra_sent == 0) | |
855 | return 0; | |
856 | ||
857 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ | |
69628e3b | 858 | r = radv_send_router(ra, NULL); |
1925f829 SS |
859 | if (r < 0) |
860 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added PREF64 prefix %s, ignoring: %m", | |
861 | strna(addr_p)); | |
862 | else | |
863 | log_radv(ra, "Sent Router Advertisement for added PREF64 prefix %s.", strna(addr_p)); | |
864 | ||
865 | return 0; | |
866 | } | |
867 | ||
faaf3d66 YW |
868 | int sd_radv_set_rdnss( |
869 | sd_radv *ra, | |
eca280c8 | 870 | uint64_t lifetime_usec, |
faaf3d66 YW |
871 | const struct in6_addr *dns, |
872 | size_t n_dns) { | |
873 | ||
e9c6da38 PF |
874 | _cleanup_free_ struct sd_radv_opt_dns *opt_rdnss = NULL; |
875 | size_t len; | |
876 | ||
877 | assert_return(ra, -EINVAL); | |
878 | assert_return(n_dns < 128, -EINVAL); | |
879 | ||
eca280c8 YW |
880 | if (lifetime_usec > RADV_RDNSS_MAX_LIFETIME_USEC) |
881 | return -EINVAL; | |
882 | ||
e9c6da38 PF |
883 | if (!dns || n_dns == 0) { |
884 | ra->rdnss = mfree(ra->rdnss); | |
885 | ra->n_rdnss = 0; | |
886 | ||
887 | return 0; | |
888 | } | |
889 | ||
890 | len = sizeof(struct sd_radv_opt_dns) + sizeof(struct in6_addr) * n_dns; | |
891 | ||
892 | opt_rdnss = malloc0(len); | |
893 | if (!opt_rdnss) | |
894 | return -ENOMEM; | |
895 | ||
d6fc0d67 | 896 | opt_rdnss->type = RADV_OPT_RDNSS; |
e9c6da38 | 897 | opt_rdnss->length = len / 8; |
eca280c8 | 898 | opt_rdnss->lifetime = usec_to_be32_sec(lifetime_usec); |
e9c6da38 PF |
899 | |
900 | memcpy(opt_rdnss + 1, dns, n_dns * sizeof(struct in6_addr)); | |
901 | ||
1cc6c93a | 902 | free_and_replace(ra->rdnss, opt_rdnss); |
e9c6da38 PF |
903 | |
904 | ra->n_rdnss = n_dns; | |
905 | ||
906 | return 0; | |
907 | } | |
908 | ||
faaf3d66 YW |
909 | int sd_radv_set_dnssl( |
910 | sd_radv *ra, | |
eca280c8 | 911 | uint64_t lifetime_usec, |
faaf3d66 YW |
912 | char **search_list) { |
913 | ||
e965d6ab PF |
914 | _cleanup_free_ struct sd_radv_opt_dns *opt_dnssl = NULL; |
915 | size_t len = 0; | |
e965d6ab PF |
916 | uint8_t *p; |
917 | ||
918 | assert_return(ra, -EINVAL); | |
919 | ||
eca280c8 YW |
920 | if (lifetime_usec > RADV_DNSSL_MAX_LIFETIME_USEC) |
921 | return -EINVAL; | |
922 | ||
97d7974b | 923 | if (strv_isempty(search_list)) { |
e965d6ab | 924 | ra->dnssl = mfree(ra->dnssl); |
e965d6ab PF |
925 | return 0; |
926 | } | |
927 | ||
928 | STRV_FOREACH(s, search_list) | |
929 | len += strlen(*s) + 2; | |
930 | ||
931 | len = (sizeof(struct sd_radv_opt_dns) + len + 7) & ~0x7; | |
932 | ||
933 | opt_dnssl = malloc0(len); | |
934 | if (!opt_dnssl) | |
935 | return -ENOMEM; | |
936 | ||
d6fc0d67 | 937 | opt_dnssl->type = RADV_OPT_DNSSL; |
e965d6ab | 938 | opt_dnssl->length = len / 8; |
eca280c8 | 939 | opt_dnssl->lifetime = usec_to_be32_sec(lifetime_usec); |
e965d6ab PF |
940 | |
941 | p = (uint8_t *)(opt_dnssl + 1); | |
942 | len -= sizeof(struct sd_radv_opt_dns); | |
943 | ||
944 | STRV_FOREACH(s, search_list) { | |
945 | int r; | |
946 | ||
947 | r = dns_name_to_wire_format(*s, p, len, false); | |
948 | if (r < 0) | |
949 | return r; | |
950 | ||
951 | if (len < (size_t)r) | |
952 | return -ENOBUFS; | |
953 | ||
954 | p += r; | |
955 | len -= r; | |
956 | } | |
957 | ||
1cc6c93a | 958 | free_and_replace(ra->dnssl, opt_dnssl); |
e965d6ab PF |
959 | |
960 | return 0; | |
961 | } | |
962 | ||
17347053 | 963 | int sd_radv_prefix_new(sd_radv_prefix **ret) { |
d2c8eed2 | 964 | sd_radv_prefix *p; |
04473969 PF |
965 | |
966 | assert_return(ret, -EINVAL); | |
967 | ||
d2c8eed2 | 968 | p = new(sd_radv_prefix, 1); |
04473969 PF |
969 | if (!p) |
970 | return -ENOMEM; | |
971 | ||
d2c8eed2 LP |
972 | *p = (sd_radv_prefix) { |
973 | .n_ref = 1, | |
04473969 | 974 | |
d2c8eed2 LP |
975 | .opt.type = ND_OPT_PREFIX_INFORMATION, |
976 | .opt.length = (sizeof(p->opt) - 1)/8 + 1, | |
977 | .opt.prefixlen = 64, | |
04473969 | 978 | |
d2c8eed2 LP |
979 | /* RFC 4861, Section 6.2.1 */ |
980 | .opt.flags = ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO, | |
204f99d2 | 981 | |
d951507d YW |
982 | .lifetime_valid_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
983 | .lifetime_preferred_usec = RADV_DEFAULT_PREFERRED_LIFETIME_USEC, | |
95e104e0 YW |
984 | .valid_until = USEC_INFINITY, |
985 | .preferred_until = USEC_INFINITY, | |
d2c8eed2 | 986 | }; |
04473969 | 987 | |
d2c8eed2 | 988 | *ret = p; |
04473969 PF |
989 | return 0; |
990 | } | |
991 | ||
8301aa0b | 992 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_prefix, sd_radv_prefix, mfree); |
04473969 | 993 | |
faaf3d66 YW |
994 | int sd_radv_prefix_set_prefix( |
995 | sd_radv_prefix *p, | |
996 | const struct in6_addr *in6_addr, | |
997 | unsigned char prefixlen) { | |
998 | ||
04473969 PF |
999 | assert_return(p, -EINVAL); |
1000 | assert_return(in6_addr, -EINVAL); | |
1001 | ||
1002 | if (prefixlen < 3 || prefixlen > 128) | |
1003 | return -EINVAL; | |
1004 | ||
1005 | if (prefixlen > 64) | |
1006 | /* unusual but allowed, log it */ | |
35388783 | 1007 | log_radv(NULL, "Unusual prefix length %d greater than 64", prefixlen); |
04473969 PF |
1008 | |
1009 | p->opt.in6_addr = *in6_addr; | |
1010 | p->opt.prefixlen = prefixlen; | |
1011 | ||
1012 | return 0; | |
1013 | } | |
1014 | ||
faaf3d66 YW |
1015 | int sd_radv_prefix_get_prefix( |
1016 | sd_radv_prefix *p, | |
1017 | struct in6_addr *ret_in6_addr, | |
1018 | unsigned char *ret_prefixlen) { | |
1019 | ||
34332af2 SS |
1020 | assert_return(p, -EINVAL); |
1021 | assert_return(ret_in6_addr, -EINVAL); | |
1022 | assert_return(ret_prefixlen, -EINVAL); | |
1023 | ||
1024 | *ret_in6_addr = p->opt.in6_addr; | |
1025 | *ret_prefixlen = p->opt.prefixlen; | |
1026 | ||
1027 | return 0; | |
1028 | } | |
1029 | ||
17347053 | 1030 | int sd_radv_prefix_set_onlink(sd_radv_prefix *p, int onlink) { |
04473969 PF |
1031 | assert_return(p, -EINVAL); |
1032 | ||
1033 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, onlink); | |
1034 | ||
1035 | return 0; | |
1036 | } | |
1037 | ||
faaf3d66 | 1038 | int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix *p, int address_autoconfiguration) { |
04473969 PF |
1039 | assert_return(p, -EINVAL); |
1040 | ||
1041 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, address_autoconfiguration); | |
1042 | ||
1043 | return 0; | |
1044 | } | |
1045 | ||
17347053 | 1046 | int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
1047 | assert_return(p, -EINVAL); |
1048 | ||
95e104e0 YW |
1049 | p->lifetime_valid_usec = lifetime_usec; |
1050 | p->valid_until = valid_until; | |
04473969 PF |
1051 | |
1052 | return 0; | |
1053 | } | |
1054 | ||
17347053 | 1055 | int sd_radv_prefix_set_preferred_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
1056 | assert_return(p, -EINVAL); |
1057 | ||
95e104e0 YW |
1058 | p->lifetime_preferred_usec = lifetime_usec; |
1059 | p->preferred_until = valid_until; | |
04473969 PF |
1060 | |
1061 | return 0; | |
1062 | } | |
203d4df5 | 1063 | |
17347053 | 1064 | int sd_radv_route_prefix_new(sd_radv_route_prefix **ret) { |
203d4df5 SS |
1065 | sd_radv_route_prefix *p; |
1066 | ||
1067 | assert_return(ret, -EINVAL); | |
1068 | ||
1069 | p = new(sd_radv_route_prefix, 1); | |
1070 | if (!p) | |
1071 | return -ENOMEM; | |
1072 | ||
1073 | *p = (sd_radv_route_prefix) { | |
1074 | .n_ref = 1, | |
1075 | ||
d6fc0d67 | 1076 | .opt.type = RADV_OPT_ROUTE_INFORMATION, |
203d4df5 SS |
1077 | .opt.length = DIV_ROUND_UP(sizeof(p->opt), 8), |
1078 | .opt.prefixlen = 64, | |
1079 | ||
d951507d | 1080 | .lifetime_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
95e104e0 | 1081 | .valid_until = USEC_INFINITY, |
203d4df5 SS |
1082 | }; |
1083 | ||
1084 | *ret = p; | |
1085 | return 0; | |
1086 | } | |
1087 | ||
1088 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_route_prefix, sd_radv_route_prefix, mfree); | |
1089 | ||
faaf3d66 YW |
1090 | int sd_radv_route_prefix_set_prefix( |
1091 | sd_radv_route_prefix *p, | |
1092 | const struct in6_addr *in6_addr, | |
1093 | unsigned char prefixlen) { | |
1094 | ||
203d4df5 SS |
1095 | assert_return(p, -EINVAL); |
1096 | assert_return(in6_addr, -EINVAL); | |
1097 | ||
1098 | if (prefixlen > 128) | |
1099 | return -EINVAL; | |
1100 | ||
1101 | if (prefixlen > 64) | |
1102 | /* unusual but allowed, log it */ | |
35388783 | 1103 | log_radv(NULL, "Unusual prefix length %u greater than 64", prefixlen); |
203d4df5 SS |
1104 | |
1105 | p->opt.in6_addr = *in6_addr; | |
1106 | p->opt.prefixlen = prefixlen; | |
1107 | ||
1108 | return 0; | |
1109 | } | |
1110 | ||
17347053 | 1111 | int sd_radv_route_prefix_set_lifetime(sd_radv_route_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
203d4df5 SS |
1112 | assert_return(p, -EINVAL); |
1113 | ||
95e104e0 YW |
1114 | p->lifetime_usec = lifetime_usec; |
1115 | p->valid_until = valid_until; | |
203d4df5 SS |
1116 | |
1117 | return 0; | |
1118 | } | |
1925f829 SS |
1119 | |
1120 | int sd_radv_pref64_prefix_new(sd_radv_pref64_prefix **ret) { | |
1121 | sd_radv_pref64_prefix *p; | |
1122 | ||
1123 | assert_return(ret, -EINVAL); | |
1124 | ||
1125 | p = new(sd_radv_pref64_prefix, 1); | |
1126 | if (!p) | |
1127 | return -ENOMEM; | |
1128 | ||
1129 | *p = (sd_radv_pref64_prefix) { | |
1130 | .n_ref = 1, | |
1131 | ||
1132 | .opt.type = RADV_OPT_PREF64, | |
1133 | .opt.length = 2, | |
1134 | }; | |
1135 | ||
1136 | *ret = p; | |
1137 | return 0; | |
1138 | } | |
1139 | ||
1140 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_pref64_prefix, sd_radv_pref64_prefix, mfree); | |
1141 | ||
1142 | int sd_radv_pref64_prefix_set_prefix( | |
1143 | sd_radv_pref64_prefix *p, | |
1144 | const struct in6_addr *prefix, | |
1145 | uint8_t prefixlen, | |
1146 | uint64_t lifetime_usec) { | |
1147 | ||
1148 | uint16_t pref64_lifetime; | |
1149 | uint8_t prefixlen_code; | |
6e8f5e4c | 1150 | int r; |
1925f829 SS |
1151 | |
1152 | assert_return(p, -EINVAL); | |
1153 | assert_return(prefix, -EINVAL); | |
1154 | ||
6e8f5e4c SS |
1155 | r = pref64_prefix_length_to_plc(prefixlen, &prefixlen_code); |
1156 | if (r < 0) | |
f31fa080 ZJS |
1157 | return log_radv_errno(NULL, r, |
1158 | "Unsupported PREF64 prefix length %u. Valid lengths are 32, 40, 48, 56, 64 and 96", prefixlen); | |
1925f829 | 1159 | |
eca280c8 | 1160 | if (lifetime_usec > PREF64_MAX_LIFETIME_USEC) |
1925f829 SS |
1161 | return -EINVAL; |
1162 | ||
1163 | /* RFC 8781 - 4.1 rounding up lifetime to multiply of 8 */ | |
1164 | pref64_lifetime = DIV_ROUND_UP(lifetime_usec, 8 * USEC_PER_SEC) << 3; | |
1165 | pref64_lifetime |= prefixlen_code; | |
1166 | ||
1167 | unaligned_write_be16(&p->opt.lifetime_and_plc, pref64_lifetime); | |
1168 | memcpy(&p->opt.prefix, prefix, sizeof(p->opt.prefix)); | |
1169 | ||
1170 | p->in6_addr = *prefix; | |
1171 | p->prefixlen = prefixlen; | |
1172 | ||
1173 | return 0; | |
1174 | } |