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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 | |
2a1e8909 | 284 | struct in6_addr src; |
cc2bcbf6 | 285 | r = sd_ndisc_router_solicit_get_sender_address(rs, &src); |
2a1e8909 YW |
286 | if (r == -ENODATA) /* null address is allowed */ |
287 | return sd_radv_send(ra); /* When an unsolicited RA, we need to also update timer. */ | |
288 | if (r < 0) | |
cc2bcbf6 | 289 | return log_radv_errno(ra, r, "Failed to get sender address of RS, ignoring: %m"); |
2a1e8909 | 290 | if (in6_addr_equal(&src, &ra->ipv6ll)) |
50ba4e40 YW |
291 | /* This should be definitely caused by a misconfiguration. If we send RA to ourself, the |
292 | * kernel complains about that. Let's ignore the packet. */ | |
293 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EADDRINUSE), "Received RS from the same interface, ignoring."); | |
88d5a3db | 294 | |
69628e3b | 295 | r = radv_send_router(ra, &src); |
cc2bcbf6 YW |
296 | if (r < 0) |
297 | return log_radv_errno(ra, r, "Unable to send solicited Router Advertisement to %s, ignoring: %m", IN6_ADDR_TO_STRING(&src)); | |
88d5a3db | 298 | |
cc2bcbf6 YW |
299 | log_radv(ra, "Sent solicited Router Advertisement to %s.", IN6_ADDR_TO_STRING(&src)); |
300 | return 0; | |
301 | } | |
88d5a3db | 302 | |
cc2bcbf6 YW |
303 | static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
304 | _cleanup_(icmp6_packet_unrefp) ICMP6Packet *packet = NULL; | |
305 | sd_radv *ra = ASSERT_PTR(userdata); | |
306 | int r; | |
cfffddea | 307 | |
cc2bcbf6 | 308 | assert(fd >= 0); |
4961f566 | 309 | |
cc2bcbf6 YW |
310 | r = icmp6_packet_receive(fd, &packet); |
311 | if (r < 0) { | |
312 | log_radv_errno(ra, r, "Failed to receive ICMPv6 packet, ignoring: %m"); | |
313 | return 0; | |
314 | } | |
88d5a3db | 315 | |
cc2bcbf6 | 316 | (void) radv_process_packet(ra, packet); |
88d5a3db PF |
317 | return 0; |
318 | } | |
319 | ||
204fb681 | 320 | static int radv_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
99534007 | 321 | sd_radv *ra = ASSERT_PTR(userdata); |
16e4dce6 YW |
322 | |
323 | if (sd_radv_send(ra) < 0) | |
324 | (void) sd_radv_stop(ra); | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
329 | int sd_radv_send(sd_radv *ra) { | |
330 | usec_t min_timeout, max_timeout, time_now, timeout; | |
7003b114 | 331 | int r; |
204fb681 | 332 | |
16e4dce6 YW |
333 | assert_return(ra, -EINVAL); |
334 | assert_return(ra->event, -EINVAL); | |
335 | assert_return(sd_radv_is_running(ra), -EINVAL); | |
80477557 | 336 | assert(router_lifetime_is_valid(ra->lifetime_usec)); |
204fb681 | 337 | |
ba4e0427 | 338 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
204fb681 | 339 | if (r < 0) |
16e4dce6 | 340 | return r; |
204fb681 | 341 | |
69628e3b | 342 | r = radv_send_router(ra, NULL); |
204fb681 | 343 | if (r < 0) |
16e4dce6 YW |
344 | return log_radv_errno(ra, r, "Unable to send Router Advertisement: %m"); |
345 | ||
346 | ra->ra_sent++; | |
204fb681 PF |
347 | |
348 | /* RFC 4861, Section 6.2.4, sending initial Router Advertisements */ | |
16e4dce6 | 349 | if (ra->ra_sent <= RADV_MAX_INITIAL_RTR_ADVERTISEMENTS) |
d6fc0d67 | 350 | max_timeout = RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC; |
80477557 | 351 | else |
03ec10fd | 352 | max_timeout = RADV_DEFAULT_MAX_TIMEOUT_USEC; |
204fb681 | 353 | |
ef90b6a4 | 354 | /* RFC 4861, Section 6.2.1, lifetime must be at least MaxRtrAdvInterval, |
80477557 YW |
355 | * so lower the interval here */ |
356 | if (ra->lifetime_usec > 0) | |
357 | max_timeout = MIN(max_timeout, ra->lifetime_usec); | |
358 | ||
359 | if (max_timeout >= 9 * USEC_PER_SEC) | |
ef90b6a4 | 360 | min_timeout = max_timeout / 3; |
80477557 YW |
361 | else |
362 | min_timeout = max_timeout * 3 / 4; | |
ef90b6a4 | 363 | |
80477557 YW |
364 | /* RFC 4861, Section 6.2.1. |
365 | * MaxRtrAdvInterval MUST be no less than 4 seconds and no greater than 1800 seconds. | |
366 | * MinRtrAdvInterval MUST be no less than 3 seconds and no greater than .75 * MaxRtrAdvInterval. */ | |
367 | assert(max_timeout >= RADV_MIN_MAX_TIMEOUT_USEC); | |
368 | assert(max_timeout <= RADV_MAX_MAX_TIMEOUT_USEC); | |
369 | assert(min_timeout >= RADV_MIN_MIN_TIMEOUT_USEC); | |
370 | assert(min_timeout <= max_timeout * 3 / 4); | |
ef90b6a4 | 371 | |
80477557 | 372 | timeout = min_timeout + random_u64_range(max_timeout - min_timeout); |
16e4dce6 YW |
373 | log_radv(ra, "Sent unsolicited Router Advertisement. Next advertisement will be in %s.", |
374 | FORMAT_TIMESPAN(timeout, USEC_PER_SEC)); | |
375 | ||
376 | return event_reset_time( | |
377 | ra->event, &ra->timeout_event_source, | |
378 | CLOCK_BOOTTIME, | |
379 | usec_add(time_now, timeout), MSEC_PER_SEC, | |
380 | radv_timeout, ra, | |
381 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
382 | } |
383 | ||
17347053 | 384 | int sd_radv_stop(sd_radv *ra) { |
204fb681 PF |
385 | int r; |
386 | ||
1fea917a YW |
387 | if (!sd_radv_is_running(ra)) |
388 | return 0; /* Already stopped. */ | |
6f8a8b84 | 389 | |
35388783 | 390 | log_radv(ra, "Stopping IPv6 Router Advertisement daemon"); |
204f99d2 | 391 | |
36653443 YW |
392 | /* RFC 4861, Section 6.2.5: |
393 | * the router SHOULD transmit one or more (but not more than MAX_FINAL_RTR_ADVERTISEMENTS) final | |
394 | * multicast Router Advertisements on the interface with a Router Lifetime field of zero. */ | |
19f3cc86 | 395 | r = radv_send_router_on_stop(ra); |
290696e5 | 396 | if (r < 0) |
abb977a6 | 397 | log_radv_errno(ra, r, "Unable to send last Router Advertisement with router lifetime set to zero, ignoring: %m"); |
204fb681 PF |
398 | |
399 | radv_reset(ra); | |
77baf5ae | 400 | ra->fd = safe_close(ra->fd); |
d6fc0d67 | 401 | ra->state = RADV_STATE_IDLE; |
204f99d2 PF |
402 | |
403 | return 0; | |
404 | } | |
405 | ||
36653443 YW |
406 | static int radv_setup_recv_event(sd_radv *ra) { |
407 | int r; | |
408 | ||
409 | assert(ra); | |
410 | assert(ra->event); | |
411 | assert(ra->ifindex > 0); | |
412 | ||
413 | _cleanup_close_ int fd = -EBADF; | |
414 | fd = icmp6_bind(ra->ifindex, /* is_router = */ true); | |
415 | if (fd < 0) | |
416 | return fd; | |
417 | ||
418 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
419 | r = sd_event_add_io(ra->event, &s, fd, EPOLLIN, radv_recv, ra); | |
420 | if (r < 0) | |
421 | return r; | |
422 | ||
423 | r = sd_event_source_set_priority(s, ra->event_priority); | |
424 | if (r < 0) | |
425 | return r; | |
426 | ||
427 | (void) sd_event_source_set_description(s, "radv-receive-message"); | |
428 | ||
429 | ra->fd = TAKE_FD(fd); | |
430 | ra->recv_event_source = TAKE_PTR(s); | |
431 | return 0; | |
432 | } | |
433 | ||
17347053 | 434 | int sd_radv_start(sd_radv *ra) { |
f474884c | 435 | int r; |
204fb681 | 436 | |
204f99d2 PF |
437 | assert_return(ra, -EINVAL); |
438 | assert_return(ra->event, -EINVAL); | |
439 | assert_return(ra->ifindex > 0, -EINVAL); | |
440 | ||
1fea917a YW |
441 | if (sd_radv_is_running(ra)) |
442 | return 0; /* Already started. */ | |
204f99d2 | 443 | |
36653443 YW |
444 | r = radv_setup_recv_event(ra); |
445 | if (r < 0) | |
446 | goto fail; | |
447 | ||
807a8ede | 448 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 449 | CLOCK_BOOTTIME, |
807a8ede YW |
450 | 0, 0, |
451 | radv_timeout, ra, | |
452 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
453 | if (r < 0) |
454 | goto fail; | |
455 | ||
d6fc0d67 | 456 | ra->state = RADV_STATE_ADVERTISING; |
204f99d2 | 457 | |
35388783 | 458 | log_radv(ra, "Started IPv6 Router Advertisement daemon"); |
204f99d2 PF |
459 | |
460 | return 0; | |
204fb681 PF |
461 | |
462 | fail: | |
463 | radv_reset(ra); | |
464 | ||
465 | return r; | |
204f99d2 PF |
466 | } |
467 | ||
17347053 | 468 | int sd_radv_set_ifindex(sd_radv *ra, int ifindex) { |
204f99d2 | 469 | assert_return(ra, -EINVAL); |
1fea917a | 470 | assert_return(!sd_radv_is_running(ra), -EBUSY); |
7fa69c0a | 471 | assert_return(ifindex > 0, -EINVAL); |
204f99d2 | 472 | |
204f99d2 | 473 | ra->ifindex = ifindex; |
204f99d2 PF |
474 | return 0; |
475 | } | |
476 | ||
61a9fa8f YW |
477 | int sd_radv_set_ifname(sd_radv *ra, const char *ifname) { |
478 | assert_return(ra, -EINVAL); | |
479 | assert_return(ifname, -EINVAL); | |
480 | ||
481 | if (!ifname_valid_full(ifname, IFNAME_VALID_ALTERNATIVE)) | |
482 | return -EINVAL; | |
483 | ||
484 | return free_and_strdup(&ra->ifname, ifname); | |
485 | } | |
486 | ||
5977b71f YW |
487 | int sd_radv_get_ifname(sd_radv *ra, const char **ret) { |
488 | int r; | |
489 | ||
490 | assert_return(ra, -EINVAL); | |
61a9fa8f | 491 | |
5977b71f YW |
492 | r = get_ifname(ra->ifindex, &ra->ifname); |
493 | if (r < 0) | |
494 | return r; | |
495 | ||
496 | if (ret) | |
497 | *ret = ra->ifname; | |
498 | ||
499 | return 0; | |
61a9fa8f YW |
500 | } |
501 | ||
50ba4e40 YW |
502 | int sd_radv_set_link_local_address(sd_radv *ra, const struct in6_addr *addr) { |
503 | assert_return(ra, -EINVAL); | |
504 | assert_return(!addr || in6_addr_is_link_local(addr), -EINVAL); | |
505 | ||
506 | if (addr) | |
507 | ra->ipv6ll = *addr; | |
508 | else | |
509 | zero(ra->ipv6ll); | |
510 | ||
511 | return 0; | |
512 | } | |
513 | ||
17347053 | 514 | int sd_radv_set_mac(sd_radv *ra, const struct ether_addr *mac_addr) { |
204f99d2 PF |
515 | assert_return(ra, -EINVAL); |
516 | ||
204f99d2 PF |
517 | if (mac_addr) |
518 | ra->mac_addr = *mac_addr; | |
519 | else | |
520 | zero(ra->mac_addr); | |
521 | ||
522 | return 0; | |
523 | } | |
524 | ||
17347053 | 525 | int sd_radv_set_mtu(sd_radv *ra, uint32_t mtu) { |
204f99d2 PF |
526 | assert_return(ra, -EINVAL); |
527 | assert_return(mtu >= 1280, -EINVAL); | |
528 | ||
204f99d2 PF |
529 | ra->mtu = mtu; |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
17347053 | 534 | int sd_radv_set_hop_limit(sd_radv *ra, uint8_t hop_limit) { |
204f99d2 PF |
535 | assert_return(ra, -EINVAL); |
536 | ||
204f99d2 | 537 | ra->hop_limit = hop_limit; |
204f99d2 PF |
538 | return 0; |
539 | } | |
540 | ||
eca280c8 | 541 | int sd_radv_set_retransmit(sd_radv *ra, uint64_t usec) { |
fdc4c67c SS |
542 | assert_return(ra, -EINVAL); |
543 | ||
eca280c8 | 544 | ra->retransmit_usec = usec; |
fdc4c67c SS |
545 | return 0; |
546 | } | |
547 | ||
eca280c8 | 548 | int sd_radv_set_router_lifetime(sd_radv *ra, uint64_t usec) { |
204f99d2 PF |
549 | assert_return(ra, -EINVAL); |
550 | ||
eca280c8 | 551 | if (!router_lifetime_is_valid(usec)) |
09457670 YW |
552 | return -EINVAL; |
553 | ||
eca280c8 | 554 | ra->lifetime_usec = usec; |
204f99d2 PF |
555 | return 0; |
556 | } | |
557 | ||
03401969 | 558 | int sd_radv_set_managed_information(sd_radv *ra, int b) { |
204f99d2 PF |
559 | assert_return(ra, -EINVAL); |
560 | ||
03401969 | 561 | SET_FLAG(ra->flags, ND_RA_FLAG_MANAGED, b); |
204f99d2 PF |
562 | return 0; |
563 | } | |
564 | ||
03401969 | 565 | int sd_radv_set_other_information(sd_radv *ra, int b) { |
204f99d2 PF |
566 | assert_return(ra, -EINVAL); |
567 | ||
03401969 | 568 | SET_FLAG(ra->flags, ND_RA_FLAG_OTHER, b); |
204f99d2 PF |
569 | return 0; |
570 | } | |
571 | ||
ba5dc3af | 572 | int sd_radv_set_preference(sd_radv *ra, uint8_t preference) { |
204f99d2 PF |
573 | assert_return(ra, -EINVAL); |
574 | assert_return(IN_SET(preference, | |
575 | SD_NDISC_PREFERENCE_LOW, | |
576 | SD_NDISC_PREFERENCE_MEDIUM, | |
577 | SD_NDISC_PREFERENCE_HIGH), -EINVAL); | |
578 | ||
ba5dc3af | 579 | ra->preference = preference; |
dd1b1870 | 580 | return 0; |
204f99d2 PF |
581 | } |
582 | ||
6a6d27bc SS |
583 | int sd_radv_set_home_agent_information(sd_radv *ra, int home_agent) { |
584 | assert_return(ra, -EINVAL); | |
585 | ||
6a6d27bc | 586 | SET_FLAG(ra->flags, ND_RA_FLAG_HOME_AGENT, home_agent); |
6a6d27bc SS |
587 | return 0; |
588 | } | |
589 | ||
590 | int sd_radv_set_home_agent_preference(sd_radv *ra, uint16_t preference) { | |
591 | assert_return(ra, -EINVAL); | |
592 | ||
6a6d27bc | 593 | ra->home_agent.nd_opt_home_agent_info_preference = htobe16(preference); |
6a6d27bc SS |
594 | return 0; |
595 | } | |
596 | ||
eca280c8 | 597 | int sd_radv_set_home_agent_lifetime(sd_radv *ra, uint64_t lifetime_usec) { |
6a6d27bc SS |
598 | assert_return(ra, -EINVAL); |
599 | ||
eca280c8 YW |
600 | if (lifetime_usec > RADV_HOME_AGENT_MAX_LIFETIME_USEC) |
601 | return -EINVAL; | |
6a6d27bc | 602 | |
eca280c8 | 603 | ra->home_agent.nd_opt_home_agent_info_lifetime = usec_to_be16_sec(lifetime_usec); |
6a6d27bc SS |
604 | return 0; |
605 | } | |
606 | ||
17347053 | 607 | int sd_radv_add_prefix(sd_radv *ra, sd_radv_prefix *p) { |
03677889 | 608 | sd_radv_prefix *found = NULL; |
d601b566 | 609 | int r; |
204f99d2 PF |
610 | |
611 | assert_return(ra, -EINVAL); | |
acbb5500 | 612 | assert_return(p, -EINVAL); |
204f99d2 | 613 | |
59ea6e57 | 614 | /* Refuse prefixes that don't have a prefix set */ |
94876904 | 615 | if (in6_addr_is_null(&p->opt.in6_addr)) |
59ea6e57 LP |
616 | return -ENOEXEC; |
617 | ||
c71384a9 | 618 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
5380707a | 619 | |
204f99d2 | 620 | LIST_FOREACH(prefix, cur, ra->prefixes) { |
204f99d2 | 621 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 622 | (const union in_addr_union*) &cur->opt.in6_addr, |
204f99d2 | 623 | cur->opt.prefixlen, |
c633628d | 624 | (const union in_addr_union*) &p->opt.in6_addr, |
204f99d2 | 625 | p->opt.prefixlen); |
5380707a YW |
626 | if (r < 0) |
627 | return r; | |
628 | if (r == 0) | |
629 | continue; | |
204f99d2 | 630 | |
95e104e0 | 631 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 632 | found = cur; |
b9f27a05 | 633 | break; |
95e104e0 | 634 | } |
d601b566 | 635 | |
35388783 | 636 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 637 | "IPv6 prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
638 | addr_p, |
639 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
204f99d2 PF |
640 | } |
641 | ||
56aa5143 | 642 | if (found) { |
b9f27a05 YW |
643 | /* p and cur may be equivalent. First increment the reference counter. */ |
644 | sd_radv_prefix_ref(p); | |
645 | ||
646 | /* Then, remove the old entry. */ | |
56aa5143 YW |
647 | LIST_REMOVE(prefix, ra->prefixes, found); |
648 | sd_radv_prefix_unref(found); | |
b9f27a05 YW |
649 | |
650 | /* Finally, add the new entry. */ | |
651 | LIST_APPEND(prefix, ra->prefixes, p); | |
652 | ||
653 | log_radv(ra, "Updated/replaced IPv6 prefix %s (preferred: %s, valid: %s)", | |
c71384a9 | 654 | addr_p, |
b9f27a05 YW |
655 | FORMAT_TIMESPAN(p->lifetime_preferred_usec, USEC_PER_SEC), |
656 | FORMAT_TIMESPAN(p->lifetime_valid_usec, USEC_PER_SEC)); | |
657 | } else { | |
658 | /* The prefix is new. Let's simply add it. */ | |
659 | ||
660 | sd_radv_prefix_ref(p); | |
661 | LIST_APPEND(prefix, ra->prefixes, p); | |
662 | ra->n_prefixes++; | |
204f99d2 | 663 | |
c71384a9 | 664 | log_radv(ra, "Added prefix %s", addr_p); |
b9f27a05 | 665 | } |
059d7b6e | 666 | |
1fea917a | 667 | if (!sd_radv_is_running(ra)) |
059d7b6e YW |
668 | return 0; |
669 | ||
059d7b6e | 670 | if (ra->ra_sent == 0) |
d601b566 | 671 | return 0; |
d601b566 | 672 | |
97efde65 | 673 | /* If RAs have already been sent, send an RA immediately to announce the newly-added prefix */ |
69628e3b | 674 | r = radv_send_router(ra, NULL); |
059d7b6e | 675 | if (r < 0) |
abb977a6 | 676 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added prefix %s, ignoring: %m", addr_p); |
059d7b6e | 677 | else |
c71384a9 | 678 | log_radv(ra, "Sent Router Advertisement for added/updated prefix %s.", addr_p); |
97efde65 | 679 | |
204f99d2 PF |
680 | return 0; |
681 | } | |
682 | ||
95931532 YW |
683 | void sd_radv_remove_prefix( |
684 | sd_radv *ra, | |
685 | const struct in6_addr *prefix, | |
686 | unsigned char prefixlen) { | |
34c169c4 | 687 | |
95931532 YW |
688 | if (!ra) |
689 | return; | |
34c169c4 | 690 | |
95931532 YW |
691 | if (!prefix) |
692 | return; | |
693 | ||
694 | LIST_FOREACH(prefix, cur, ra->prefixes) { | |
34c169c4 PF |
695 | if (prefixlen != cur->opt.prefixlen) |
696 | continue; | |
697 | ||
94876904 | 698 | if (!in6_addr_equal(prefix, &cur->opt.in6_addr)) |
34c169c4 PF |
699 | continue; |
700 | ||
701 | LIST_REMOVE(prefix, ra->prefixes, cur); | |
702 | ra->n_prefixes--; | |
62bbbedf | 703 | sd_radv_prefix_unref(cur); |
95931532 | 704 | return; |
34c169c4 | 705 | } |
34c169c4 PF |
706 | } |
707 | ||
17347053 | 708 | int sd_radv_add_route_prefix(sd_radv *ra, sd_radv_route_prefix *p) { |
03677889 | 709 | sd_radv_route_prefix *found = NULL; |
203d4df5 SS |
710 | int r; |
711 | ||
712 | assert_return(ra, -EINVAL); | |
acbb5500 | 713 | assert_return(p, -EINVAL); |
203d4df5 | 714 | |
c71384a9 | 715 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
203d4df5 SS |
716 | |
717 | LIST_FOREACH(prefix, cur, ra->route_prefixes) { | |
203d4df5 | 718 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 719 | (const union in_addr_union*) &cur->opt.in6_addr, |
203d4df5 | 720 | cur->opt.prefixlen, |
c633628d | 721 | (const union in_addr_union*) &p->opt.in6_addr, |
203d4df5 SS |
722 | p->opt.prefixlen); |
723 | if (r < 0) | |
724 | return r; | |
725 | if (r == 0) | |
726 | continue; | |
727 | ||
95e104e0 | 728 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 729 | found = cur; |
b9f27a05 | 730 | break; |
95e104e0 | 731 | } |
203d4df5 | 732 | |
35388783 | 733 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 734 | "IPv6 route prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
735 | addr_p, |
736 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
203d4df5 SS |
737 | } |
738 | ||
56aa5143 | 739 | if (found) { |
b9f27a05 YW |
740 | /* p and cur may be equivalent. First increment the reference counter. */ |
741 | sd_radv_route_prefix_ref(p); | |
742 | ||
743 | /* Then, remove the old entry. */ | |
56aa5143 YW |
744 | LIST_REMOVE(prefix, ra->route_prefixes, found); |
745 | sd_radv_route_prefix_unref(found); | |
b9f27a05 YW |
746 | |
747 | /* Finally, add the new entry. */ | |
748 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
749 | ||
750 | log_radv(ra, "Updated/replaced IPv6 route prefix %s (lifetime: %s)", | |
751 | strna(addr_p), | |
752 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
753 | } else { | |
754 | /* The route prefix is new. Let's simply add it. */ | |
755 | ||
756 | sd_radv_route_prefix_ref(p); | |
757 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
758 | ra->n_route_prefixes++; | |
759 | ||
760 | log_radv(ra, "Added route prefix %s", strna(addr_p)); | |
761 | } | |
059d7b6e | 762 | |
1fea917a | 763 | if (!sd_radv_is_running(ra)) |
059d7b6e YW |
764 | return 0; |
765 | ||
059d7b6e | 766 | if (ra->ra_sent == 0) |
203d4df5 | 767 | return 0; |
203d4df5 | 768 | |
97efde65 | 769 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ |
69628e3b | 770 | r = radv_send_router(ra, NULL); |
059d7b6e | 771 | if (r < 0) |
abb977a6 | 772 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added route prefix %s, ignoring: %m", |
b9f27a05 | 773 | strna(addr_p)); |
059d7b6e | 774 | else |
b9f27a05 | 775 | log_radv(ra, "Sent Router Advertisement for added route prefix %s.", strna(addr_p)); |
97efde65 | 776 | |
203d4df5 SS |
777 | return 0; |
778 | } | |
779 | ||
1925f829 SS |
780 | int sd_radv_add_pref64_prefix(sd_radv *ra, sd_radv_pref64_prefix *p) { |
781 | sd_radv_pref64_prefix *found = NULL; | |
782 | int r; | |
783 | ||
784 | assert_return(ra, -EINVAL); | |
785 | assert_return(p, -EINVAL); | |
786 | ||
787 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->in6_addr, p->prefixlen); | |
788 | ||
789 | LIST_FOREACH(prefix, cur, ra->pref64_prefixes) { | |
790 | r = in_addr_prefix_intersect(AF_INET6, | |
791 | (const union in_addr_union*) &cur->in6_addr, | |
792 | cur->prefixlen, | |
793 | (const union in_addr_union*) &p->in6_addr, | |
794 | p->prefixlen); | |
795 | if (r < 0) | |
796 | return r; | |
797 | if (r == 0) | |
798 | continue; | |
799 | ||
800 | if (cur->prefixlen == p->prefixlen) { | |
801 | found = cur; | |
802 | break; | |
803 | } | |
804 | ||
805 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), | |
806 | "IPv6 PREF64 prefix %s conflicts with %s, ignoring.", | |
807 | addr_p, | |
808 | IN6_ADDR_PREFIX_TO_STRING(&cur->in6_addr, cur->prefixlen)); | |
809 | } | |
810 | ||
811 | if (found) { | |
812 | /* p and cur may be equivalent. First increment the reference counter. */ | |
813 | sd_radv_pref64_prefix_ref(p); | |
814 | ||
815 | /* Then, remove the old entry. */ | |
816 | LIST_REMOVE(prefix, ra->pref64_prefixes, found); | |
817 | sd_radv_pref64_prefix_unref(found); | |
818 | ||
819 | /* Finally, add the new entry. */ | |
820 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
821 | ||
822 | log_radv(ra, "Updated/replaced IPv6 PREF64 prefix %s (lifetime: %s)", | |
823 | strna(addr_p), | |
824 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); | |
825 | } else { | |
826 | /* The route prefix is new. Let's simply add it. */ | |
827 | ||
828 | sd_radv_pref64_prefix_ref(p); | |
829 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
830 | ra->n_pref64_prefixes++; | |
831 | ||
832 | log_radv(ra, "Added PREF64 prefix %s", strna(addr_p)); | |
833 | } | |
834 | ||
1fea917a | 835 | if (!sd_radv_is_running(ra)) |
1925f829 SS |
836 | return 0; |
837 | ||
838 | if (ra->ra_sent == 0) | |
839 | return 0; | |
840 | ||
841 | /* If RAs have already been sent, send an RA immediately to announce the newly-added route prefix */ | |
69628e3b | 842 | r = radv_send_router(ra, NULL); |
1925f829 SS |
843 | if (r < 0) |
844 | log_radv_errno(ra, r, "Unable to send Router Advertisement for added PREF64 prefix %s, ignoring: %m", | |
845 | strna(addr_p)); | |
846 | else | |
847 | log_radv(ra, "Sent Router Advertisement for added PREF64 prefix %s.", strna(addr_p)); | |
848 | ||
849 | return 0; | |
850 | } | |
851 | ||
faaf3d66 YW |
852 | int sd_radv_set_rdnss( |
853 | sd_radv *ra, | |
eca280c8 | 854 | uint64_t lifetime_usec, |
faaf3d66 YW |
855 | const struct in6_addr *dns, |
856 | size_t n_dns) { | |
857 | ||
e9c6da38 PF |
858 | _cleanup_free_ struct sd_radv_opt_dns *opt_rdnss = NULL; |
859 | size_t len; | |
860 | ||
861 | assert_return(ra, -EINVAL); | |
862 | assert_return(n_dns < 128, -EINVAL); | |
863 | ||
eca280c8 YW |
864 | if (lifetime_usec > RADV_RDNSS_MAX_LIFETIME_USEC) |
865 | return -EINVAL; | |
866 | ||
e9c6da38 PF |
867 | if (!dns || n_dns == 0) { |
868 | ra->rdnss = mfree(ra->rdnss); | |
869 | ra->n_rdnss = 0; | |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
874 | len = sizeof(struct sd_radv_opt_dns) + sizeof(struct in6_addr) * n_dns; | |
875 | ||
876 | opt_rdnss = malloc0(len); | |
877 | if (!opt_rdnss) | |
878 | return -ENOMEM; | |
879 | ||
d6fc0d67 | 880 | opt_rdnss->type = RADV_OPT_RDNSS; |
e9c6da38 | 881 | opt_rdnss->length = len / 8; |
eca280c8 | 882 | opt_rdnss->lifetime = usec_to_be32_sec(lifetime_usec); |
e9c6da38 PF |
883 | |
884 | memcpy(opt_rdnss + 1, dns, n_dns * sizeof(struct in6_addr)); | |
885 | ||
1cc6c93a | 886 | free_and_replace(ra->rdnss, opt_rdnss); |
e9c6da38 PF |
887 | |
888 | ra->n_rdnss = n_dns; | |
889 | ||
890 | return 0; | |
891 | } | |
892 | ||
faaf3d66 YW |
893 | int sd_radv_set_dnssl( |
894 | sd_radv *ra, | |
eca280c8 | 895 | uint64_t lifetime_usec, |
faaf3d66 YW |
896 | char **search_list) { |
897 | ||
e965d6ab PF |
898 | _cleanup_free_ struct sd_radv_opt_dns *opt_dnssl = NULL; |
899 | size_t len = 0; | |
e965d6ab PF |
900 | uint8_t *p; |
901 | ||
902 | assert_return(ra, -EINVAL); | |
903 | ||
eca280c8 YW |
904 | if (lifetime_usec > RADV_DNSSL_MAX_LIFETIME_USEC) |
905 | return -EINVAL; | |
906 | ||
97d7974b | 907 | if (strv_isempty(search_list)) { |
e965d6ab | 908 | ra->dnssl = mfree(ra->dnssl); |
e965d6ab PF |
909 | return 0; |
910 | } | |
911 | ||
912 | STRV_FOREACH(s, search_list) | |
913 | len += strlen(*s) + 2; | |
914 | ||
915 | len = (sizeof(struct sd_radv_opt_dns) + len + 7) & ~0x7; | |
916 | ||
917 | opt_dnssl = malloc0(len); | |
918 | if (!opt_dnssl) | |
919 | return -ENOMEM; | |
920 | ||
d6fc0d67 | 921 | opt_dnssl->type = RADV_OPT_DNSSL; |
e965d6ab | 922 | opt_dnssl->length = len / 8; |
eca280c8 | 923 | opt_dnssl->lifetime = usec_to_be32_sec(lifetime_usec); |
e965d6ab PF |
924 | |
925 | p = (uint8_t *)(opt_dnssl + 1); | |
926 | len -= sizeof(struct sd_radv_opt_dns); | |
927 | ||
928 | STRV_FOREACH(s, search_list) { | |
929 | int r; | |
930 | ||
931 | r = dns_name_to_wire_format(*s, p, len, false); | |
932 | if (r < 0) | |
933 | return r; | |
934 | ||
935 | if (len < (size_t)r) | |
936 | return -ENOBUFS; | |
937 | ||
938 | p += r; | |
939 | len -= r; | |
940 | } | |
941 | ||
1cc6c93a | 942 | free_and_replace(ra->dnssl, opt_dnssl); |
e965d6ab PF |
943 | |
944 | return 0; | |
945 | } | |
946 | ||
17347053 | 947 | int sd_radv_prefix_new(sd_radv_prefix **ret) { |
d2c8eed2 | 948 | sd_radv_prefix *p; |
04473969 PF |
949 | |
950 | assert_return(ret, -EINVAL); | |
951 | ||
d2c8eed2 | 952 | p = new(sd_radv_prefix, 1); |
04473969 PF |
953 | if (!p) |
954 | return -ENOMEM; | |
955 | ||
d2c8eed2 LP |
956 | *p = (sd_radv_prefix) { |
957 | .n_ref = 1, | |
04473969 | 958 | |
d2c8eed2 LP |
959 | .opt.type = ND_OPT_PREFIX_INFORMATION, |
960 | .opt.length = (sizeof(p->opt) - 1)/8 + 1, | |
961 | .opt.prefixlen = 64, | |
04473969 | 962 | |
d2c8eed2 LP |
963 | /* RFC 4861, Section 6.2.1 */ |
964 | .opt.flags = ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO, | |
204f99d2 | 965 | |
d951507d YW |
966 | .lifetime_valid_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
967 | .lifetime_preferred_usec = RADV_DEFAULT_PREFERRED_LIFETIME_USEC, | |
95e104e0 YW |
968 | .valid_until = USEC_INFINITY, |
969 | .preferred_until = USEC_INFINITY, | |
d2c8eed2 | 970 | }; |
04473969 | 971 | |
d2c8eed2 | 972 | *ret = p; |
04473969 PF |
973 | return 0; |
974 | } | |
975 | ||
8301aa0b | 976 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_prefix, sd_radv_prefix, mfree); |
04473969 | 977 | |
faaf3d66 YW |
978 | int sd_radv_prefix_set_prefix( |
979 | sd_radv_prefix *p, | |
980 | const struct in6_addr *in6_addr, | |
981 | unsigned char prefixlen) { | |
982 | ||
04473969 PF |
983 | assert_return(p, -EINVAL); |
984 | assert_return(in6_addr, -EINVAL); | |
985 | ||
986 | if (prefixlen < 3 || prefixlen > 128) | |
987 | return -EINVAL; | |
988 | ||
989 | if (prefixlen > 64) | |
990 | /* unusual but allowed, log it */ | |
35388783 | 991 | log_radv(NULL, "Unusual prefix length %d greater than 64", prefixlen); |
04473969 PF |
992 | |
993 | p->opt.in6_addr = *in6_addr; | |
994 | p->opt.prefixlen = prefixlen; | |
995 | ||
996 | return 0; | |
997 | } | |
998 | ||
faaf3d66 YW |
999 | int sd_radv_prefix_get_prefix( |
1000 | sd_radv_prefix *p, | |
1001 | struct in6_addr *ret_in6_addr, | |
1002 | unsigned char *ret_prefixlen) { | |
1003 | ||
34332af2 SS |
1004 | assert_return(p, -EINVAL); |
1005 | assert_return(ret_in6_addr, -EINVAL); | |
1006 | assert_return(ret_prefixlen, -EINVAL); | |
1007 | ||
1008 | *ret_in6_addr = p->opt.in6_addr; | |
1009 | *ret_prefixlen = p->opt.prefixlen; | |
1010 | ||
1011 | return 0; | |
1012 | } | |
1013 | ||
17347053 | 1014 | int sd_radv_prefix_set_onlink(sd_radv_prefix *p, int onlink) { |
04473969 PF |
1015 | assert_return(p, -EINVAL); |
1016 | ||
1017 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, onlink); | |
1018 | ||
1019 | return 0; | |
1020 | } | |
1021 | ||
faaf3d66 | 1022 | int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix *p, int address_autoconfiguration) { |
04473969 PF |
1023 | assert_return(p, -EINVAL); |
1024 | ||
1025 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, address_autoconfiguration); | |
1026 | ||
1027 | return 0; | |
1028 | } | |
1029 | ||
17347053 | 1030 | int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
1031 | assert_return(p, -EINVAL); |
1032 | ||
95e104e0 YW |
1033 | p->lifetime_valid_usec = lifetime_usec; |
1034 | p->valid_until = valid_until; | |
04473969 PF |
1035 | |
1036 | return 0; | |
1037 | } | |
1038 | ||
17347053 | 1039 | int sd_radv_prefix_set_preferred_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
1040 | assert_return(p, -EINVAL); |
1041 | ||
95e104e0 YW |
1042 | p->lifetime_preferred_usec = lifetime_usec; |
1043 | p->preferred_until = valid_until; | |
04473969 PF |
1044 | |
1045 | return 0; | |
1046 | } | |
203d4df5 | 1047 | |
17347053 | 1048 | int sd_radv_route_prefix_new(sd_radv_route_prefix **ret) { |
203d4df5 SS |
1049 | sd_radv_route_prefix *p; |
1050 | ||
1051 | assert_return(ret, -EINVAL); | |
1052 | ||
1053 | p = new(sd_radv_route_prefix, 1); | |
1054 | if (!p) | |
1055 | return -ENOMEM; | |
1056 | ||
1057 | *p = (sd_radv_route_prefix) { | |
1058 | .n_ref = 1, | |
1059 | ||
d6fc0d67 | 1060 | .opt.type = RADV_OPT_ROUTE_INFORMATION, |
203d4df5 SS |
1061 | .opt.length = DIV_ROUND_UP(sizeof(p->opt), 8), |
1062 | .opt.prefixlen = 64, | |
1063 | ||
d951507d | 1064 | .lifetime_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
95e104e0 | 1065 | .valid_until = USEC_INFINITY, |
203d4df5 SS |
1066 | }; |
1067 | ||
1068 | *ret = p; | |
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_route_prefix, sd_radv_route_prefix, mfree); | |
1073 | ||
faaf3d66 YW |
1074 | int sd_radv_route_prefix_set_prefix( |
1075 | sd_radv_route_prefix *p, | |
1076 | const struct in6_addr *in6_addr, | |
1077 | unsigned char prefixlen) { | |
1078 | ||
203d4df5 SS |
1079 | assert_return(p, -EINVAL); |
1080 | assert_return(in6_addr, -EINVAL); | |
1081 | ||
1082 | if (prefixlen > 128) | |
1083 | return -EINVAL; | |
1084 | ||
1085 | if (prefixlen > 64) | |
1086 | /* unusual but allowed, log it */ | |
35388783 | 1087 | log_radv(NULL, "Unusual prefix length %u greater than 64", prefixlen); |
203d4df5 SS |
1088 | |
1089 | p->opt.in6_addr = *in6_addr; | |
1090 | p->opt.prefixlen = prefixlen; | |
1091 | ||
1092 | return 0; | |
1093 | } | |
1094 | ||
17347053 | 1095 | int sd_radv_route_prefix_set_lifetime(sd_radv_route_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
203d4df5 SS |
1096 | assert_return(p, -EINVAL); |
1097 | ||
95e104e0 YW |
1098 | p->lifetime_usec = lifetime_usec; |
1099 | p->valid_until = valid_until; | |
203d4df5 SS |
1100 | |
1101 | return 0; | |
1102 | } | |
1925f829 SS |
1103 | |
1104 | int sd_radv_pref64_prefix_new(sd_radv_pref64_prefix **ret) { | |
1105 | sd_radv_pref64_prefix *p; | |
1106 | ||
1107 | assert_return(ret, -EINVAL); | |
1108 | ||
1109 | p = new(sd_radv_pref64_prefix, 1); | |
1110 | if (!p) | |
1111 | return -ENOMEM; | |
1112 | ||
1113 | *p = (sd_radv_pref64_prefix) { | |
1114 | .n_ref = 1, | |
1115 | ||
1116 | .opt.type = RADV_OPT_PREF64, | |
1117 | .opt.length = 2, | |
1118 | }; | |
1119 | ||
1120 | *ret = p; | |
1121 | return 0; | |
1122 | } | |
1123 | ||
1124 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_pref64_prefix, sd_radv_pref64_prefix, mfree); | |
1125 | ||
1126 | int sd_radv_pref64_prefix_set_prefix( | |
1127 | sd_radv_pref64_prefix *p, | |
1128 | const struct in6_addr *prefix, | |
1129 | uint8_t prefixlen, | |
1130 | uint64_t lifetime_usec) { | |
1131 | ||
1132 | uint16_t pref64_lifetime; | |
1133 | uint8_t prefixlen_code; | |
6e8f5e4c | 1134 | int r; |
1925f829 SS |
1135 | |
1136 | assert_return(p, -EINVAL); | |
1137 | assert_return(prefix, -EINVAL); | |
1138 | ||
6e8f5e4c SS |
1139 | r = pref64_prefix_length_to_plc(prefixlen, &prefixlen_code); |
1140 | if (r < 0) | |
f31fa080 ZJS |
1141 | return log_radv_errno(NULL, r, |
1142 | "Unsupported PREF64 prefix length %u. Valid lengths are 32, 40, 48, 56, 64 and 96", prefixlen); | |
1925f829 | 1143 | |
eca280c8 | 1144 | if (lifetime_usec > PREF64_MAX_LIFETIME_USEC) |
1925f829 SS |
1145 | return -EINVAL; |
1146 | ||
1147 | /* RFC 8781 - 4.1 rounding up lifetime to multiply of 8 */ | |
1148 | pref64_lifetime = DIV_ROUND_UP(lifetime_usec, 8 * USEC_PER_SEC) << 3; | |
1149 | pref64_lifetime |= prefixlen_code; | |
1150 | ||
1151 | unaligned_write_be16(&p->opt.lifetime_and_plc, pref64_lifetime); | |
1152 | memcpy(&p->opt.prefix, prefix, sizeof(p->opt.prefix)); | |
1153 | ||
1154 | p->in6_addr = *prefix; | |
1155 | p->prefixlen = prefixlen; | |
1156 | ||
1157 | return 0; | |
1158 | } |