]>
Commit | Line | Data |
---|---|---|
db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
04473969 | 2 | /*** |
810adae9 | 3 | Copyright © 2017 Intel Corporation. All rights reserved. |
04473969 PF |
4 | ***/ |
5 | ||
6 | #include <netinet/icmp6.h> | |
7 | #include <netinet/in.h> | |
204f99d2 | 8 | #include <arpa/inet.h> |
04473969 PF |
9 | |
10 | #include "sd-radv.h" | |
11 | ||
12 | #include "alloc-util.h" | |
e965d6ab | 13 | #include "dns-domain.h" |
ae25915d | 14 | #include "ether-addr-util.h" |
807a8ede | 15 | #include "event-util.h" |
04473969 PF |
16 | #include "fd-util.h" |
17 | #include "icmp6-util.h" | |
18 | #include "in-addr-util.h" | |
bd1ae178 | 19 | #include "iovec-util.h" |
5cfa2c3d | 20 | #include "macro.h" |
0a970718 | 21 | #include "memory-util.h" |
cc2bcbf6 | 22 | #include "ndisc-router-solicit-internal.h" |
61a9fa8f | 23 | #include "network-common.h" |
04473969 | 24 | #include "radv-internal.h" |
5cfa2c3d | 25 | #include "random-util.h" |
04473969 PF |
26 | #include "socket-util.h" |
27 | #include "string-util.h" | |
e965d6ab | 28 | #include "strv.h" |
1925f829 | 29 | #include "unaligned.h" |
04473969 | 30 | |
17347053 | 31 | int sd_radv_new(sd_radv **ret) { |
204f99d2 PF |
32 | _cleanup_(sd_radv_unrefp) sd_radv *ra = NULL; |
33 | ||
34 | assert_return(ret, -EINVAL); | |
35 | ||
78f9d24f | 36 | ra = new(sd_radv, 1); |
204f99d2 PF |
37 | if (!ra) |
38 | return -ENOMEM; | |
39 | ||
78f9d24f YW |
40 | *ra = (sd_radv) { |
41 | .n_ref = 1, | |
254d1313 | 42 | .fd = -EBADF, |
72db0a71 | 43 | .lifetime_usec = RADV_DEFAULT_ROUTER_LIFETIME_USEC, |
78f9d24f | 44 | }; |
204f99d2 | 45 | |
1cc6c93a | 46 | *ret = TAKE_PTR(ra); |
204f99d2 PF |
47 | |
48 | return 0; | |
49 | } | |
50 | ||
17347053 | 51 | int sd_radv_attach_event(sd_radv *ra, sd_event *event, int64_t priority) { |
204f99d2 PF |
52 | int r; |
53 | ||
54 | assert_return(ra, -EINVAL); | |
55 | assert_return(!ra->event, -EBUSY); | |
56 | ||
57 | if (event) | |
58 | ra->event = sd_event_ref(event); | |
59 | else { | |
60 | r = sd_event_default(&ra->event); | |
61 | if (r < 0) | |
62 | return 0; | |
63 | } | |
64 | ||
65 | ra->event_priority = priority; | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
17347053 | 70 | int sd_radv_detach_event(sd_radv *ra) { |
204f99d2 PF |
71 | |
72 | assert_return(ra, -EINVAL); | |
73 | ||
74 | ra->event = sd_event_unref(ra->event); | |
75 | return 0; | |
76 | } | |
77 | ||
17347053 | 78 | sd_event *sd_radv_get_event(sd_radv *ra) { |
204f99d2 PF |
79 | assert_return(ra, NULL); |
80 | ||
81 | return ra->event; | |
82 | } | |
83 | ||
17347053 | 84 | int sd_radv_is_running(sd_radv *ra) { |
8e91738f YW |
85 | if (!ra) |
86 | return false; | |
96fe813c | 87 | |
d6fc0d67 | 88 | return ra->state != RADV_STATE_IDLE; |
96fe813c YW |
89 | } |
90 | ||
204fb681 | 91 | static void radv_reset(sd_radv *ra) { |
c4b6dda0 | 92 | assert(ra); |
204fb681 | 93 | |
807a8ede | 94 | (void) event_source_disable(ra->timeout_event_source); |
204fb681 | 95 | |
eb2f7502 | 96 | ra->recv_event_source = sd_event_source_disable_unref(ra->recv_event_source); |
88d5a3db | 97 | |
204fb681 PF |
98 | ra->ra_sent = 0; |
99 | } | |
100 | ||
8301aa0b | 101 | static sd_radv *radv_free(sd_radv *ra) { |
e866e17b LP |
102 | if (!ra) |
103 | return NULL; | |
204f99d2 | 104 | |
9aad490e DT |
105 | LIST_CLEAR(prefix, ra->prefixes, sd_radv_prefix_unref); |
106 | LIST_CLEAR(prefix, ra->route_prefixes, sd_radv_route_prefix_unref); | |
1a6b1214 | 107 | LIST_CLEAR(prefix, ra->pref64_prefixes, sd_radv_pref64_prefix_unref); |
69d7eba1 | 108 | |
e9c6da38 | 109 | free(ra->rdnss); |
f9aa5417 | 110 | free(ra->dnssl); |
e9c6da38 | 111 | |
204fb681 PF |
112 | radv_reset(ra); |
113 | ||
eb2f7502 | 114 | sd_event_source_unref(ra->timeout_event_source); |
204f99d2 | 115 | sd_radv_detach_event(ra); |
c4b6dda0 LP |
116 | |
117 | ra->fd = safe_close(ra->fd); | |
61a9fa8f | 118 | free(ra->ifname); |
c4b6dda0 | 119 | |
204f99d2 PF |
120 | return mfree(ra); |
121 | } | |
122 | ||
8301aa0b YW |
123 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv, sd_radv, radv_free); |
124 | ||
09457670 | 125 | static bool router_lifetime_is_valid(usec_t lifetime_usec) { |
36653443 | 126 | assert_cc(RADV_MAX_ROUTER_LIFETIME_USEC <= UINT16_MAX * USEC_PER_SEC); |
09457670 YW |
127 | return lifetime_usec == 0 || |
128 | (lifetime_usec >= RADV_MIN_ROUTER_LIFETIME_USEC && | |
129 | lifetime_usec <= RADV_MAX_ROUTER_LIFETIME_USEC); | |
130 | } | |
131 | ||
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), |
bc50700c | 166 | .nd_ra_reachable = usec_to_be32_msec(ra->reachable_usec), |
36653443 YW |
167 | .nd_ra_retransmit = usec_to_be32_msec(ra->retransmit_usec), |
168 | }; | |
77baf5ae PF |
169 | struct { |
170 | struct nd_opt_hdr opthdr; | |
171 | struct ether_addr slladdr; | |
172 | } _packed_ opt_mac = { | |
173 | .opthdr = { | |
174 | .nd_opt_type = ND_OPT_SOURCE_LINKADDR, | |
36653443 | 175 | .nd_opt_len = DIV_ROUND_UP(sizeof(struct nd_opt_hdr) + sizeof(struct ether_addr), 8), |
77baf5ae | 176 | }, |
36653443 | 177 | .slladdr = ra->mac_addr, |
77baf5ae PF |
178 | }; |
179 | struct nd_opt_mtu opt_mtu = { | |
180 | .nd_opt_mtu_type = ND_OPT_MTU, | |
181 | .nd_opt_mtu_len = 1, | |
36653443 | 182 | .nd_opt_mtu_mtu = htobe32(ra->mtu), |
77baf5ae | 183 | }; |
ac63c8df YW |
184 | /* Reserve iov space for RA header, linkaddr, MTU, N prefixes, N routes, N pref64 prefixes, RDNSS, |
185 | * DNSSL, and home agent. */ | |
186 | struct iovec iov[6 + ra->n_prefixes + ra->n_route_prefixes + ra->n_pref64_prefixes]; | |
77baf5ae PF |
187 | struct msghdr msg = { |
188 | .msg_name = &dst_addr, | |
189 | .msg_namelen = sizeof(dst_addr), | |
190 | .msg_iov = iov, | |
191 | }; | |
d601b566 PF |
192 | usec_t time_now; |
193 | int r; | |
194 | ||
ba4e0427 | 195 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
d601b566 PF |
196 | if (r < 0) |
197 | return r; | |
77baf5ae | 198 | |
94876904 | 199 | if (dst && in6_addr_is_set(dst)) |
77baf5ae | 200 | dst_addr.sin6_addr = *dst; |
88d5a3db | 201 | |
36653443 YW |
202 | /* The nd_ra_curhoplimit and nd_ra_flags_reserved fields cannot specified with nd_ra_router_lifetime |
203 | * simultaneously in the structured initializer in the above. */ | |
77baf5ae | 204 | adv.nd_ra_curhoplimit = ra->hop_limit; |
ba5dc3af YW |
205 | /* RFC 4191, Section 2.2, |
206 | * "...If the Router Lifetime is zero, the preference value MUST be set to (00) by the sender..." */ | |
207 | adv.nd_ra_flags_reserved = ra->flags | (ra->lifetime_usec > 0 ? (ra->preference << 3) : 0); | |
5cfa2c3d | 208 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&adv, sizeof(adv)); |
77baf5ae | 209 | |
36653443 YW |
210 | /* MAC address is optional, either because the link does not use L2 addresses or load sharing is |
211 | * desired. See RFC 4861, Section 4.2. */ | |
212 | if (!ether_addr_is_null(&ra->mac_addr)) | |
5cfa2c3d | 213 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mac, sizeof(opt_mac)); |
77baf5ae | 214 | |
36653443 | 215 | if (ra->mtu > 0) |
5cfa2c3d | 216 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&opt_mtu, sizeof(opt_mtu)); |
77baf5ae PF |
217 | |
218 | LIST_FOREACH(prefix, p, ra->prefixes) { | |
95e104e0 | 219 | usec_t lifetime_valid_usec, lifetime_preferred_usec; |
d601b566 | 220 | |
95e104e0 YW |
221 | lifetime_valid_usec = MIN(usec_sub_unsigned(p->valid_until, time_now), |
222 | p->lifetime_valid_usec); | |
223 | ||
224 | lifetime_preferred_usec = MIN3(usec_sub_unsigned(p->preferred_until, time_now), | |
225 | p->lifetime_preferred_usec, | |
226 | lifetime_valid_usec); | |
227 | ||
228 | p->opt.lifetime_valid = usec_to_be32_sec(lifetime_valid_usec); | |
229 | p->opt.lifetime_preferred = usec_to_be32_sec(lifetime_preferred_usec); | |
d601b566 | 230 | |
5cfa2c3d | 231 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&p->opt, sizeof(p->opt)); |
77baf5ae PF |
232 | } |
233 | ||
95e104e0 YW |
234 | LIST_FOREACH(prefix, rt, ra->route_prefixes) { |
235 | rt->opt.lifetime = usec_to_be32_sec(MIN(usec_sub_unsigned(rt->valid_until, time_now), | |
236 | rt->lifetime_usec)); | |
237 | ||
203d4df5 | 238 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&rt->opt, sizeof(rt->opt)); |
95e104e0 | 239 | } |
203d4df5 | 240 | |
1925f829 SS |
241 | LIST_FOREACH(prefix, p, ra->pref64_prefixes) |
242 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&p->opt, sizeof(p->opt)); | |
243 | ||
5cfa2c3d LP |
244 | if (ra->rdnss) |
245 | iov[msg.msg_iovlen++] = IOVEC_MAKE(ra->rdnss, ra->rdnss->length * 8); | |
e9c6da38 | 246 | |
5cfa2c3d LP |
247 | if (ra->dnssl) |
248 | iov[msg.msg_iovlen++] = IOVEC_MAKE(ra->dnssl, ra->dnssl->length * 8); | |
e965d6ab | 249 | |
6a6d27bc SS |
250 | if (FLAGS_SET(ra->flags, ND_RA_FLAG_HOME_AGENT)) { |
251 | ra->home_agent.nd_opt_home_agent_info_type = ND_OPT_HOME_AGENT_INFO; | |
252 | ra->home_agent.nd_opt_home_agent_info_len = 1; | |
253 | ||
254 | /* 0 means to place the current Router Lifetime value */ | |
255 | if (ra->home_agent.nd_opt_home_agent_info_lifetime == 0) | |
256 | ra->home_agent.nd_opt_home_agent_info_lifetime = adv.nd_ra_router_lifetime; | |
257 | ||
258 | iov[msg.msg_iovlen++] = IOVEC_MAKE(&ra->home_agent, sizeof(ra->home_agent)); | |
259 | } | |
260 | ||
77baf5ae PF |
261 | if (sendmsg(ra->fd, &msg, 0) < 0) |
262 | return -errno; | |
204fb681 | 263 | |
77baf5ae | 264 | return 0; |
204fb681 PF |
265 | } |
266 | ||
cc2bcbf6 | 267 | static int radv_process_packet(sd_radv *ra, ICMP6Packet *packet) { |
88d5a3db | 268 | int r; |
88d5a3db | 269 | |
cc2bcbf6 YW |
270 | assert(ra); |
271 | assert(packet); | |
88d5a3db | 272 | |
cc2bcbf6 YW |
273 | if (icmp6_packet_get_type(packet) != ND_ROUTER_SOLICIT) |
274 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EBADMSG), "Received ICMP6 packet with unexpected type, ignoring."); | |
88d5a3db | 275 | |
cc2bcbf6 YW |
276 | _cleanup_(sd_ndisc_router_solicit_unrefp) sd_ndisc_router_solicit *rs = NULL; |
277 | rs = ndisc_router_solicit_new(packet); | |
278 | if (!rs) | |
279 | return log_oom_debug(); | |
88d5a3db | 280 | |
cc2bcbf6 | 281 | r = ndisc_router_solicit_parse(ra, rs); |
1f2db2e3 | 282 | if (r < 0) |
cc2bcbf6 | 283 | return r; |
88d5a3db | 284 | |
2a1e8909 | 285 | struct in6_addr src; |
cc2bcbf6 | 286 | r = sd_ndisc_router_solicit_get_sender_address(rs, &src); |
2a1e8909 YW |
287 | if (r == -ENODATA) /* null address is allowed */ |
288 | return sd_radv_send(ra); /* When an unsolicited RA, we need to also update timer. */ | |
289 | if (r < 0) | |
cc2bcbf6 | 290 | return log_radv_errno(ra, r, "Failed to get sender address of RS, ignoring: %m"); |
2a1e8909 | 291 | if (in6_addr_equal(&src, &ra->ipv6ll)) |
50ba4e40 YW |
292 | /* This should be definitely caused by a misconfiguration. If we send RA to ourself, the |
293 | * kernel complains about that. Let's ignore the packet. */ | |
294 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EADDRINUSE), "Received RS from the same interface, ignoring."); | |
88d5a3db | 295 | |
69628e3b | 296 | r = radv_send_router(ra, &src); |
cc2bcbf6 YW |
297 | if (r < 0) |
298 | return log_radv_errno(ra, r, "Unable to send solicited Router Advertisement to %s, ignoring: %m", IN6_ADDR_TO_STRING(&src)); | |
88d5a3db | 299 | |
cc2bcbf6 YW |
300 | log_radv(ra, "Sent solicited Router Advertisement to %s.", IN6_ADDR_TO_STRING(&src)); |
301 | return 0; | |
302 | } | |
88d5a3db | 303 | |
cc2bcbf6 YW |
304 | static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
305 | _cleanup_(icmp6_packet_unrefp) ICMP6Packet *packet = NULL; | |
306 | sd_radv *ra = ASSERT_PTR(userdata); | |
307 | int r; | |
cfffddea | 308 | |
cc2bcbf6 | 309 | assert(fd >= 0); |
4961f566 | 310 | |
cc2bcbf6 YW |
311 | r = icmp6_packet_receive(fd, &packet); |
312 | if (r < 0) { | |
313 | log_radv_errno(ra, r, "Failed to receive ICMPv6 packet, ignoring: %m"); | |
314 | return 0; | |
315 | } | |
88d5a3db | 316 | |
cc2bcbf6 | 317 | (void) radv_process_packet(ra, packet); |
88d5a3db PF |
318 | return 0; |
319 | } | |
320 | ||
204fb681 | 321 | static int radv_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
99534007 | 322 | sd_radv *ra = ASSERT_PTR(userdata); |
16e4dce6 YW |
323 | |
324 | if (sd_radv_send(ra) < 0) | |
325 | (void) sd_radv_stop(ra); | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
330 | int sd_radv_send(sd_radv *ra) { | |
331 | usec_t min_timeout, max_timeout, time_now, timeout; | |
7003b114 | 332 | int r; |
204fb681 | 333 | |
16e4dce6 YW |
334 | assert_return(ra, -EINVAL); |
335 | assert_return(ra->event, -EINVAL); | |
336 | assert_return(sd_radv_is_running(ra), -EINVAL); | |
80477557 | 337 | assert(router_lifetime_is_valid(ra->lifetime_usec)); |
204fb681 | 338 | |
ba4e0427 | 339 | r = sd_event_now(ra->event, CLOCK_BOOTTIME, &time_now); |
204fb681 | 340 | if (r < 0) |
16e4dce6 | 341 | return r; |
204fb681 | 342 | |
69628e3b | 343 | r = radv_send_router(ra, NULL); |
204fb681 | 344 | if (r < 0) |
16e4dce6 YW |
345 | return log_radv_errno(ra, r, "Unable to send Router Advertisement: %m"); |
346 | ||
347 | ra->ra_sent++; | |
204fb681 PF |
348 | |
349 | /* RFC 4861, Section 6.2.4, sending initial Router Advertisements */ | |
16e4dce6 | 350 | if (ra->ra_sent <= RADV_MAX_INITIAL_RTR_ADVERTISEMENTS) |
d6fc0d67 | 351 | max_timeout = RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC; |
80477557 | 352 | else |
03ec10fd | 353 | max_timeout = RADV_DEFAULT_MAX_TIMEOUT_USEC; |
204fb681 | 354 | |
ef90b6a4 | 355 | /* RFC 4861, Section 6.2.1, lifetime must be at least MaxRtrAdvInterval, |
80477557 YW |
356 | * so lower the interval here */ |
357 | if (ra->lifetime_usec > 0) | |
358 | max_timeout = MIN(max_timeout, ra->lifetime_usec); | |
359 | ||
360 | if (max_timeout >= 9 * USEC_PER_SEC) | |
ef90b6a4 | 361 | min_timeout = max_timeout / 3; |
80477557 YW |
362 | else |
363 | min_timeout = max_timeout * 3 / 4; | |
ef90b6a4 | 364 | |
80477557 YW |
365 | /* RFC 4861, Section 6.2.1. |
366 | * MaxRtrAdvInterval MUST be no less than 4 seconds and no greater than 1800 seconds. | |
367 | * MinRtrAdvInterval MUST be no less than 3 seconds and no greater than .75 * MaxRtrAdvInterval. */ | |
368 | assert(max_timeout >= RADV_MIN_MAX_TIMEOUT_USEC); | |
369 | assert(max_timeout <= RADV_MAX_MAX_TIMEOUT_USEC); | |
370 | assert(min_timeout >= RADV_MIN_MIN_TIMEOUT_USEC); | |
371 | assert(min_timeout <= max_timeout * 3 / 4); | |
ef90b6a4 | 372 | |
80477557 | 373 | timeout = min_timeout + random_u64_range(max_timeout - min_timeout); |
16e4dce6 YW |
374 | log_radv(ra, "Sent unsolicited Router Advertisement. Next advertisement will be in %s.", |
375 | FORMAT_TIMESPAN(timeout, USEC_PER_SEC)); | |
376 | ||
377 | return event_reset_time( | |
378 | ra->event, &ra->timeout_event_source, | |
379 | CLOCK_BOOTTIME, | |
380 | usec_add(time_now, timeout), MSEC_PER_SEC, | |
381 | radv_timeout, ra, | |
382 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
383 | } |
384 | ||
17347053 | 385 | int sd_radv_stop(sd_radv *ra) { |
204fb681 PF |
386 | int r; |
387 | ||
1fea917a YW |
388 | if (!sd_radv_is_running(ra)) |
389 | return 0; /* Already stopped. */ | |
6f8a8b84 | 390 | |
35388783 | 391 | log_radv(ra, "Stopping IPv6 Router Advertisement daemon"); |
204f99d2 | 392 | |
36653443 YW |
393 | /* RFC 4861, Section 6.2.5: |
394 | * the router SHOULD transmit one or more (but not more than MAX_FINAL_RTR_ADVERTISEMENTS) final | |
395 | * multicast Router Advertisements on the interface with a Router Lifetime field of zero. */ | |
19f3cc86 | 396 | r = radv_send_router_on_stop(ra); |
290696e5 | 397 | if (r < 0) |
abb977a6 | 398 | log_radv_errno(ra, r, "Unable to send last Router Advertisement with router lifetime set to zero, ignoring: %m"); |
204fb681 PF |
399 | |
400 | radv_reset(ra); | |
77baf5ae | 401 | ra->fd = safe_close(ra->fd); |
d6fc0d67 | 402 | ra->state = RADV_STATE_IDLE; |
204f99d2 PF |
403 | |
404 | return 0; | |
405 | } | |
406 | ||
36653443 YW |
407 | static int radv_setup_recv_event(sd_radv *ra) { |
408 | int r; | |
409 | ||
410 | assert(ra); | |
411 | assert(ra->event); | |
412 | assert(ra->ifindex > 0); | |
413 | ||
414 | _cleanup_close_ int fd = -EBADF; | |
415 | fd = icmp6_bind(ra->ifindex, /* is_router = */ true); | |
416 | if (fd < 0) | |
417 | return fd; | |
418 | ||
419 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
420 | r = sd_event_add_io(ra->event, &s, fd, EPOLLIN, radv_recv, ra); | |
421 | if (r < 0) | |
422 | return r; | |
423 | ||
424 | r = sd_event_source_set_priority(s, ra->event_priority); | |
425 | if (r < 0) | |
426 | return r; | |
427 | ||
428 | (void) sd_event_source_set_description(s, "radv-receive-message"); | |
429 | ||
430 | ra->fd = TAKE_FD(fd); | |
431 | ra->recv_event_source = TAKE_PTR(s); | |
432 | return 0; | |
433 | } | |
434 | ||
17347053 | 435 | int sd_radv_start(sd_radv *ra) { |
f474884c | 436 | int r; |
204fb681 | 437 | |
204f99d2 PF |
438 | assert_return(ra, -EINVAL); |
439 | assert_return(ra->event, -EINVAL); | |
440 | assert_return(ra->ifindex > 0, -EINVAL); | |
441 | ||
1fea917a YW |
442 | if (sd_radv_is_running(ra)) |
443 | return 0; /* Already started. */ | |
204f99d2 | 444 | |
36653443 YW |
445 | r = radv_setup_recv_event(ra); |
446 | if (r < 0) | |
447 | goto fail; | |
448 | ||
807a8ede | 449 | r = event_reset_time(ra->event, &ra->timeout_event_source, |
ba4e0427 | 450 | CLOCK_BOOTTIME, |
807a8ede YW |
451 | 0, 0, |
452 | radv_timeout, ra, | |
453 | ra->event_priority, "radv-timeout", true); | |
204fb681 PF |
454 | if (r < 0) |
455 | goto fail; | |
456 | ||
d6fc0d67 | 457 | ra->state = RADV_STATE_ADVERTISING; |
204f99d2 | 458 | |
35388783 | 459 | log_radv(ra, "Started IPv6 Router Advertisement daemon"); |
204f99d2 PF |
460 | |
461 | return 0; | |
204fb681 PF |
462 | |
463 | fail: | |
464 | radv_reset(ra); | |
465 | ||
466 | return r; | |
204f99d2 PF |
467 | } |
468 | ||
17347053 | 469 | int sd_radv_set_ifindex(sd_radv *ra, int ifindex) { |
204f99d2 | 470 | assert_return(ra, -EINVAL); |
1fea917a | 471 | assert_return(!sd_radv_is_running(ra), -EBUSY); |
7fa69c0a | 472 | assert_return(ifindex > 0, -EINVAL); |
204f99d2 | 473 | |
204f99d2 | 474 | ra->ifindex = ifindex; |
204f99d2 PF |
475 | return 0; |
476 | } | |
477 | ||
61a9fa8f YW |
478 | int sd_radv_set_ifname(sd_radv *ra, const char *ifname) { |
479 | assert_return(ra, -EINVAL); | |
480 | assert_return(ifname, -EINVAL); | |
481 | ||
482 | if (!ifname_valid_full(ifname, IFNAME_VALID_ALTERNATIVE)) | |
483 | return -EINVAL; | |
484 | ||
485 | return free_and_strdup(&ra->ifname, ifname); | |
486 | } | |
487 | ||
5977b71f YW |
488 | int sd_radv_get_ifname(sd_radv *ra, const char **ret) { |
489 | int r; | |
490 | ||
491 | assert_return(ra, -EINVAL); | |
61a9fa8f | 492 | |
5977b71f YW |
493 | r = get_ifname(ra->ifindex, &ra->ifname); |
494 | if (r < 0) | |
495 | return r; | |
496 | ||
497 | if (ret) | |
498 | *ret = ra->ifname; | |
499 | ||
500 | return 0; | |
61a9fa8f YW |
501 | } |
502 | ||
50ba4e40 YW |
503 | int sd_radv_set_link_local_address(sd_radv *ra, const struct in6_addr *addr) { |
504 | assert_return(ra, -EINVAL); | |
505 | assert_return(!addr || in6_addr_is_link_local(addr), -EINVAL); | |
506 | ||
507 | if (addr) | |
508 | ra->ipv6ll = *addr; | |
509 | else | |
510 | zero(ra->ipv6ll); | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
17347053 | 515 | int sd_radv_set_mac(sd_radv *ra, const struct ether_addr *mac_addr) { |
204f99d2 PF |
516 | assert_return(ra, -EINVAL); |
517 | ||
204f99d2 PF |
518 | if (mac_addr) |
519 | ra->mac_addr = *mac_addr; | |
520 | else | |
521 | zero(ra->mac_addr); | |
522 | ||
523 | return 0; | |
524 | } | |
525 | ||
17347053 | 526 | int sd_radv_set_mtu(sd_radv *ra, uint32_t mtu) { |
204f99d2 PF |
527 | assert_return(ra, -EINVAL); |
528 | assert_return(mtu >= 1280, -EINVAL); | |
529 | ||
204f99d2 PF |
530 | ra->mtu = mtu; |
531 | ||
532 | return 0; | |
533 | } | |
534 | ||
17347053 | 535 | int sd_radv_set_hop_limit(sd_radv *ra, uint8_t hop_limit) { |
204f99d2 PF |
536 | assert_return(ra, -EINVAL); |
537 | ||
204f99d2 | 538 | ra->hop_limit = hop_limit; |
204f99d2 PF |
539 | return 0; |
540 | } | |
541 | ||
bc50700c YW |
542 | int sd_radv_set_reachable_time(sd_radv *ra, uint64_t usec) { |
543 | assert_return(ra, -EINVAL); | |
544 | ||
545 | ra->reachable_usec = usec; | |
546 | return 0; | |
547 | } | |
548 | ||
eca280c8 | 549 | int sd_radv_set_retransmit(sd_radv *ra, uint64_t usec) { |
fdc4c67c SS |
550 | assert_return(ra, -EINVAL); |
551 | ||
eca280c8 | 552 | ra->retransmit_usec = usec; |
fdc4c67c SS |
553 | return 0; |
554 | } | |
555 | ||
eca280c8 | 556 | int sd_radv_set_router_lifetime(sd_radv *ra, uint64_t usec) { |
204f99d2 PF |
557 | assert_return(ra, -EINVAL); |
558 | ||
eca280c8 | 559 | if (!router_lifetime_is_valid(usec)) |
09457670 YW |
560 | return -EINVAL; |
561 | ||
eca280c8 | 562 | ra->lifetime_usec = usec; |
204f99d2 PF |
563 | return 0; |
564 | } | |
565 | ||
03401969 | 566 | int sd_radv_set_managed_information(sd_radv *ra, int b) { |
204f99d2 PF |
567 | assert_return(ra, -EINVAL); |
568 | ||
03401969 | 569 | SET_FLAG(ra->flags, ND_RA_FLAG_MANAGED, b); |
204f99d2 PF |
570 | return 0; |
571 | } | |
572 | ||
03401969 | 573 | int sd_radv_set_other_information(sd_radv *ra, int b) { |
204f99d2 PF |
574 | assert_return(ra, -EINVAL); |
575 | ||
03401969 | 576 | SET_FLAG(ra->flags, ND_RA_FLAG_OTHER, b); |
204f99d2 PF |
577 | return 0; |
578 | } | |
579 | ||
ba5dc3af | 580 | int sd_radv_set_preference(sd_radv *ra, uint8_t preference) { |
204f99d2 PF |
581 | assert_return(ra, -EINVAL); |
582 | assert_return(IN_SET(preference, | |
583 | SD_NDISC_PREFERENCE_LOW, | |
584 | SD_NDISC_PREFERENCE_MEDIUM, | |
585 | SD_NDISC_PREFERENCE_HIGH), -EINVAL); | |
586 | ||
ba5dc3af | 587 | ra->preference = preference; |
dd1b1870 | 588 | return 0; |
204f99d2 PF |
589 | } |
590 | ||
6a6d27bc SS |
591 | int sd_radv_set_home_agent_information(sd_radv *ra, int home_agent) { |
592 | assert_return(ra, -EINVAL); | |
593 | ||
6a6d27bc | 594 | SET_FLAG(ra->flags, ND_RA_FLAG_HOME_AGENT, home_agent); |
6a6d27bc SS |
595 | return 0; |
596 | } | |
597 | ||
598 | int sd_radv_set_home_agent_preference(sd_radv *ra, uint16_t preference) { | |
599 | assert_return(ra, -EINVAL); | |
600 | ||
6a6d27bc | 601 | ra->home_agent.nd_opt_home_agent_info_preference = htobe16(preference); |
6a6d27bc SS |
602 | return 0; |
603 | } | |
604 | ||
eca280c8 | 605 | int sd_radv_set_home_agent_lifetime(sd_radv *ra, uint64_t lifetime_usec) { |
6a6d27bc SS |
606 | assert_return(ra, -EINVAL); |
607 | ||
eca280c8 YW |
608 | if (lifetime_usec > RADV_HOME_AGENT_MAX_LIFETIME_USEC) |
609 | return -EINVAL; | |
6a6d27bc | 610 | |
eca280c8 | 611 | ra->home_agent.nd_opt_home_agent_info_lifetime = usec_to_be16_sec(lifetime_usec); |
6a6d27bc SS |
612 | return 0; |
613 | } | |
614 | ||
17347053 | 615 | int sd_radv_add_prefix(sd_radv *ra, sd_radv_prefix *p) { |
03677889 | 616 | sd_radv_prefix *found = NULL; |
d601b566 | 617 | int r; |
204f99d2 PF |
618 | |
619 | assert_return(ra, -EINVAL); | |
acbb5500 | 620 | assert_return(p, -EINVAL); |
204f99d2 | 621 | |
59ea6e57 | 622 | /* Refuse prefixes that don't have a prefix set */ |
94876904 | 623 | if (in6_addr_is_null(&p->opt.in6_addr)) |
59ea6e57 LP |
624 | return -ENOEXEC; |
625 | ||
c71384a9 | 626 | const char *addr_p = IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen); |
5380707a | 627 | |
204f99d2 | 628 | LIST_FOREACH(prefix, cur, ra->prefixes) { |
204f99d2 | 629 | r = in_addr_prefix_intersect(AF_INET6, |
c633628d | 630 | (const union in_addr_union*) &cur->opt.in6_addr, |
204f99d2 | 631 | cur->opt.prefixlen, |
c633628d | 632 | (const union in_addr_union*) &p->opt.in6_addr, |
204f99d2 | 633 | p->opt.prefixlen); |
5380707a YW |
634 | if (r < 0) |
635 | return r; | |
636 | if (r == 0) | |
637 | continue; | |
204f99d2 | 638 | |
95e104e0 | 639 | if (cur->opt.prefixlen == p->opt.prefixlen) { |
56aa5143 | 640 | found = cur; |
b9f27a05 | 641 | break; |
95e104e0 | 642 | } |
d601b566 | 643 | |
35388783 | 644 | return log_radv_errno(ra, SYNTHETIC_ERRNO(EEXIST), |
95e104e0 | 645 | "IPv6 prefix %s conflicts with %s, ignoring.", |
c71384a9 ZJS |
646 | addr_p, |
647 | IN6_ADDR_PREFIX_TO_STRING(&cur->opt.in6_addr, cur->opt.prefixlen)); | |
204f99d2 PF |
648 | } |
649 | ||
56aa5143 | 650 | if (found) { |
b9f27a05 YW |
651 | /* p and cur may be equivalent. First increment the reference counter. */ |
652 | sd_radv_prefix_ref(p); | |
653 | ||
654 | /* Then, remove the old entry. */ | |
56aa5143 YW |
655 | LIST_REMOVE(prefix, ra->prefixes, found); |
656 | sd_radv_prefix_unref(found); | |
b9f27a05 YW |
657 | |
658 | /* Finally, add the new entry. */ | |
659 | LIST_APPEND(prefix, ra->prefixes, p); | |
660 | ||
661 | log_radv(ra, "Updated/replaced IPv6 prefix %s (preferred: %s, valid: %s)", | |
c71384a9 | 662 | addr_p, |
b9f27a05 YW |
663 | FORMAT_TIMESPAN(p->lifetime_preferred_usec, USEC_PER_SEC), |
664 | FORMAT_TIMESPAN(p->lifetime_valid_usec, USEC_PER_SEC)); | |
665 | } else { | |
666 | /* The prefix is new. Let's simply add it. */ | |
667 | ||
668 | sd_radv_prefix_ref(p); | |
669 | LIST_APPEND(prefix, ra->prefixes, p); | |
670 | ra->n_prefixes++; | |
204f99d2 | 671 | |
c71384a9 | 672 | log_radv(ra, "Added prefix %s", addr_p); |
b9f27a05 | 673 | } |
059d7b6e | 674 | |
204f99d2 PF |
675 | return 0; |
676 | } | |
677 | ||
95931532 YW |
678 | void sd_radv_remove_prefix( |
679 | sd_radv *ra, | |
680 | const struct in6_addr *prefix, | |
681 | unsigned char prefixlen) { | |
34c169c4 | 682 | |
95931532 YW |
683 | if (!ra) |
684 | return; | |
34c169c4 | 685 | |
95931532 YW |
686 | if (!prefix) |
687 | return; | |
688 | ||
689 | LIST_FOREACH(prefix, cur, ra->prefixes) { | |
34c169c4 PF |
690 | if (prefixlen != cur->opt.prefixlen) |
691 | continue; | |
692 | ||
94876904 | 693 | if (!in6_addr_equal(prefix, &cur->opt.in6_addr)) |
34c169c4 PF |
694 | continue; |
695 | ||
696 | LIST_REMOVE(prefix, ra->prefixes, cur); | |
697 | ra->n_prefixes--; | |
62bbbedf | 698 | sd_radv_prefix_unref(cur); |
95931532 | 699 | return; |
34c169c4 | 700 | } |
34c169c4 PF |
701 | } |
702 | ||
17347053 | 703 | int sd_radv_add_route_prefix(sd_radv *ra, sd_radv_route_prefix *p) { |
03677889 | 704 | sd_radv_route_prefix *found = NULL; |
203d4df5 SS |
705 | |
706 | assert_return(ra, -EINVAL); | |
acbb5500 | 707 | assert_return(p, -EINVAL); |
203d4df5 | 708 | |
9dc25035 YW |
709 | LIST_FOREACH(prefix, cur, ra->route_prefixes) |
710 | if (cur->opt.prefixlen == p->opt.prefixlen && | |
711 | in6_addr_equal(&cur->opt.in6_addr, &p->opt.in6_addr)) { | |
56aa5143 | 712 | found = cur; |
b9f27a05 | 713 | break; |
95e104e0 | 714 | } |
203d4df5 | 715 | |
56aa5143 | 716 | if (found) { |
b9f27a05 YW |
717 | /* p and cur may be equivalent. First increment the reference counter. */ |
718 | sd_radv_route_prefix_ref(p); | |
719 | ||
720 | /* Then, remove the old entry. */ | |
56aa5143 YW |
721 | LIST_REMOVE(prefix, ra->route_prefixes, found); |
722 | sd_radv_route_prefix_unref(found); | |
b9f27a05 YW |
723 | |
724 | /* Finally, add the new entry. */ | |
725 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
726 | ||
727 | log_radv(ra, "Updated/replaced IPv6 route prefix %s (lifetime: %s)", | |
9dc25035 | 728 | IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen), |
b9f27a05 YW |
729 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); |
730 | } else { | |
731 | /* The route prefix is new. Let's simply add it. */ | |
732 | ||
733 | sd_radv_route_prefix_ref(p); | |
734 | LIST_APPEND(prefix, ra->route_prefixes, p); | |
735 | ra->n_route_prefixes++; | |
736 | ||
9dc25035 YW |
737 | log_radv(ra, "Added route prefix %s", |
738 | IN6_ADDR_PREFIX_TO_STRING(&p->opt.in6_addr, p->opt.prefixlen)); | |
b9f27a05 | 739 | } |
059d7b6e | 740 | |
203d4df5 SS |
741 | return 0; |
742 | } | |
743 | ||
1925f829 SS |
744 | int sd_radv_add_pref64_prefix(sd_radv *ra, sd_radv_pref64_prefix *p) { |
745 | sd_radv_pref64_prefix *found = NULL; | |
1925f829 SS |
746 | |
747 | assert_return(ra, -EINVAL); | |
748 | assert_return(p, -EINVAL); | |
749 | ||
9dc25035 YW |
750 | LIST_FOREACH(prefix, cur, ra->pref64_prefixes) |
751 | if (cur->prefixlen == p->prefixlen && | |
752 | in6_addr_equal(&cur->in6_addr, &p->in6_addr)) { | |
1925f829 SS |
753 | found = cur; |
754 | break; | |
755 | } | |
756 | ||
1925f829 SS |
757 | if (found) { |
758 | /* p and cur may be equivalent. First increment the reference counter. */ | |
759 | sd_radv_pref64_prefix_ref(p); | |
760 | ||
761 | /* Then, remove the old entry. */ | |
762 | LIST_REMOVE(prefix, ra->pref64_prefixes, found); | |
763 | sd_radv_pref64_prefix_unref(found); | |
764 | ||
765 | /* Finally, add the new entry. */ | |
766 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
767 | ||
768 | log_radv(ra, "Updated/replaced IPv6 PREF64 prefix %s (lifetime: %s)", | |
9dc25035 | 769 | IN6_ADDR_PREFIX_TO_STRING(&p->in6_addr, p->prefixlen), |
1925f829 SS |
770 | FORMAT_TIMESPAN(p->lifetime_usec, USEC_PER_SEC)); |
771 | } else { | |
772 | /* The route prefix is new. Let's simply add it. */ | |
773 | ||
774 | sd_radv_pref64_prefix_ref(p); | |
775 | LIST_APPEND(prefix, ra->pref64_prefixes, p); | |
776 | ra->n_pref64_prefixes++; | |
777 | ||
9dc25035 YW |
778 | log_radv(ra, "Added PREF64 prefix %s", |
779 | IN6_ADDR_PREFIX_TO_STRING(&p->in6_addr, p->prefixlen)); | |
1925f829 SS |
780 | } |
781 | ||
1925f829 SS |
782 | return 0; |
783 | } | |
784 | ||
faaf3d66 YW |
785 | int sd_radv_set_rdnss( |
786 | sd_radv *ra, | |
eca280c8 | 787 | uint64_t lifetime_usec, |
faaf3d66 YW |
788 | const struct in6_addr *dns, |
789 | size_t n_dns) { | |
790 | ||
e9c6da38 PF |
791 | _cleanup_free_ struct sd_radv_opt_dns *opt_rdnss = NULL; |
792 | size_t len; | |
793 | ||
794 | assert_return(ra, -EINVAL); | |
795 | assert_return(n_dns < 128, -EINVAL); | |
796 | ||
eca280c8 YW |
797 | if (lifetime_usec > RADV_RDNSS_MAX_LIFETIME_USEC) |
798 | return -EINVAL; | |
799 | ||
e9c6da38 PF |
800 | if (!dns || n_dns == 0) { |
801 | ra->rdnss = mfree(ra->rdnss); | |
802 | ra->n_rdnss = 0; | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
807 | len = sizeof(struct sd_radv_opt_dns) + sizeof(struct in6_addr) * n_dns; | |
808 | ||
809 | opt_rdnss = malloc0(len); | |
810 | if (!opt_rdnss) | |
811 | return -ENOMEM; | |
812 | ||
d6fc0d67 | 813 | opt_rdnss->type = RADV_OPT_RDNSS; |
e9c6da38 | 814 | opt_rdnss->length = len / 8; |
eca280c8 | 815 | opt_rdnss->lifetime = usec_to_be32_sec(lifetime_usec); |
e9c6da38 PF |
816 | |
817 | memcpy(opt_rdnss + 1, dns, n_dns * sizeof(struct in6_addr)); | |
818 | ||
1cc6c93a | 819 | free_and_replace(ra->rdnss, opt_rdnss); |
e9c6da38 PF |
820 | |
821 | ra->n_rdnss = n_dns; | |
822 | ||
823 | return 0; | |
824 | } | |
825 | ||
faaf3d66 YW |
826 | int sd_radv_set_dnssl( |
827 | sd_radv *ra, | |
eca280c8 | 828 | uint64_t lifetime_usec, |
faaf3d66 YW |
829 | char **search_list) { |
830 | ||
e965d6ab PF |
831 | _cleanup_free_ struct sd_radv_opt_dns *opt_dnssl = NULL; |
832 | size_t len = 0; | |
e965d6ab PF |
833 | uint8_t *p; |
834 | ||
835 | assert_return(ra, -EINVAL); | |
836 | ||
eca280c8 YW |
837 | if (lifetime_usec > RADV_DNSSL_MAX_LIFETIME_USEC) |
838 | return -EINVAL; | |
839 | ||
97d7974b | 840 | if (strv_isempty(search_list)) { |
e965d6ab | 841 | ra->dnssl = mfree(ra->dnssl); |
e965d6ab PF |
842 | return 0; |
843 | } | |
844 | ||
845 | STRV_FOREACH(s, search_list) | |
846 | len += strlen(*s) + 2; | |
847 | ||
848 | len = (sizeof(struct sd_radv_opt_dns) + len + 7) & ~0x7; | |
849 | ||
850 | opt_dnssl = malloc0(len); | |
851 | if (!opt_dnssl) | |
852 | return -ENOMEM; | |
853 | ||
d6fc0d67 | 854 | opt_dnssl->type = RADV_OPT_DNSSL; |
e965d6ab | 855 | opt_dnssl->length = len / 8; |
eca280c8 | 856 | opt_dnssl->lifetime = usec_to_be32_sec(lifetime_usec); |
e965d6ab PF |
857 | |
858 | p = (uint8_t *)(opt_dnssl + 1); | |
859 | len -= sizeof(struct sd_radv_opt_dns); | |
860 | ||
861 | STRV_FOREACH(s, search_list) { | |
862 | int r; | |
863 | ||
864 | r = dns_name_to_wire_format(*s, p, len, false); | |
865 | if (r < 0) | |
866 | return r; | |
867 | ||
868 | if (len < (size_t)r) | |
869 | return -ENOBUFS; | |
870 | ||
871 | p += r; | |
872 | len -= r; | |
873 | } | |
874 | ||
1cc6c93a | 875 | free_and_replace(ra->dnssl, opt_dnssl); |
e965d6ab PF |
876 | |
877 | return 0; | |
878 | } | |
879 | ||
17347053 | 880 | int sd_radv_prefix_new(sd_radv_prefix **ret) { |
d2c8eed2 | 881 | sd_radv_prefix *p; |
04473969 PF |
882 | |
883 | assert_return(ret, -EINVAL); | |
884 | ||
d2c8eed2 | 885 | p = new(sd_radv_prefix, 1); |
04473969 PF |
886 | if (!p) |
887 | return -ENOMEM; | |
888 | ||
d2c8eed2 LP |
889 | *p = (sd_radv_prefix) { |
890 | .n_ref = 1, | |
04473969 | 891 | |
d2c8eed2 LP |
892 | .opt.type = ND_OPT_PREFIX_INFORMATION, |
893 | .opt.length = (sizeof(p->opt) - 1)/8 + 1, | |
894 | .opt.prefixlen = 64, | |
04473969 | 895 | |
d2c8eed2 LP |
896 | /* RFC 4861, Section 6.2.1 */ |
897 | .opt.flags = ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO, | |
204f99d2 | 898 | |
d951507d YW |
899 | .lifetime_valid_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
900 | .lifetime_preferred_usec = RADV_DEFAULT_PREFERRED_LIFETIME_USEC, | |
95e104e0 YW |
901 | .valid_until = USEC_INFINITY, |
902 | .preferred_until = USEC_INFINITY, | |
d2c8eed2 | 903 | }; |
04473969 | 904 | |
d2c8eed2 | 905 | *ret = p; |
04473969 PF |
906 | return 0; |
907 | } | |
908 | ||
8301aa0b | 909 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_prefix, sd_radv_prefix, mfree); |
04473969 | 910 | |
faaf3d66 YW |
911 | int sd_radv_prefix_set_prefix( |
912 | sd_radv_prefix *p, | |
913 | const struct in6_addr *in6_addr, | |
914 | unsigned char prefixlen) { | |
915 | ||
04473969 PF |
916 | assert_return(p, -EINVAL); |
917 | assert_return(in6_addr, -EINVAL); | |
918 | ||
919 | if (prefixlen < 3 || prefixlen > 128) | |
920 | return -EINVAL; | |
921 | ||
922 | if (prefixlen > 64) | |
923 | /* unusual but allowed, log it */ | |
35388783 | 924 | log_radv(NULL, "Unusual prefix length %d greater than 64", prefixlen); |
04473969 PF |
925 | |
926 | p->opt.in6_addr = *in6_addr; | |
927 | p->opt.prefixlen = prefixlen; | |
928 | ||
929 | return 0; | |
930 | } | |
931 | ||
faaf3d66 YW |
932 | int sd_radv_prefix_get_prefix( |
933 | sd_radv_prefix *p, | |
934 | struct in6_addr *ret_in6_addr, | |
935 | unsigned char *ret_prefixlen) { | |
936 | ||
34332af2 SS |
937 | assert_return(p, -EINVAL); |
938 | assert_return(ret_in6_addr, -EINVAL); | |
939 | assert_return(ret_prefixlen, -EINVAL); | |
940 | ||
941 | *ret_in6_addr = p->opt.in6_addr; | |
942 | *ret_prefixlen = p->opt.prefixlen; | |
943 | ||
944 | return 0; | |
945 | } | |
946 | ||
17347053 | 947 | int sd_radv_prefix_set_onlink(sd_radv_prefix *p, int onlink) { |
04473969 PF |
948 | assert_return(p, -EINVAL); |
949 | ||
950 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, onlink); | |
951 | ||
952 | return 0; | |
953 | } | |
954 | ||
faaf3d66 | 955 | int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix *p, int address_autoconfiguration) { |
04473969 PF |
956 | assert_return(p, -EINVAL); |
957 | ||
958 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, address_autoconfiguration); | |
959 | ||
960 | return 0; | |
961 | } | |
962 | ||
17347053 | 963 | int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
964 | assert_return(p, -EINVAL); |
965 | ||
95e104e0 YW |
966 | p->lifetime_valid_usec = lifetime_usec; |
967 | p->valid_until = valid_until; | |
04473969 PF |
968 | |
969 | return 0; | |
970 | } | |
971 | ||
17347053 | 972 | int sd_radv_prefix_set_preferred_lifetime(sd_radv_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
04473969 PF |
973 | assert_return(p, -EINVAL); |
974 | ||
95e104e0 YW |
975 | p->lifetime_preferred_usec = lifetime_usec; |
976 | p->preferred_until = valid_until; | |
04473969 PF |
977 | |
978 | return 0; | |
979 | } | |
203d4df5 | 980 | |
17347053 | 981 | int sd_radv_route_prefix_new(sd_radv_route_prefix **ret) { |
203d4df5 SS |
982 | sd_radv_route_prefix *p; |
983 | ||
984 | assert_return(ret, -EINVAL); | |
985 | ||
986 | p = new(sd_radv_route_prefix, 1); | |
987 | if (!p) | |
988 | return -ENOMEM; | |
989 | ||
990 | *p = (sd_radv_route_prefix) { | |
991 | .n_ref = 1, | |
992 | ||
d6fc0d67 | 993 | .opt.type = RADV_OPT_ROUTE_INFORMATION, |
203d4df5 SS |
994 | .opt.length = DIV_ROUND_UP(sizeof(p->opt), 8), |
995 | .opt.prefixlen = 64, | |
996 | ||
d951507d | 997 | .lifetime_usec = RADV_DEFAULT_VALID_LIFETIME_USEC, |
95e104e0 | 998 | .valid_until = USEC_INFINITY, |
203d4df5 SS |
999 | }; |
1000 | ||
1001 | *ret = p; | |
1002 | return 0; | |
1003 | } | |
1004 | ||
1005 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_route_prefix, sd_radv_route_prefix, mfree); | |
1006 | ||
faaf3d66 YW |
1007 | int sd_radv_route_prefix_set_prefix( |
1008 | sd_radv_route_prefix *p, | |
1009 | const struct in6_addr *in6_addr, | |
1010 | unsigned char prefixlen) { | |
1011 | ||
203d4df5 SS |
1012 | assert_return(p, -EINVAL); |
1013 | assert_return(in6_addr, -EINVAL); | |
1014 | ||
1015 | if (prefixlen > 128) | |
1016 | return -EINVAL; | |
1017 | ||
1018 | if (prefixlen > 64) | |
1019 | /* unusual but allowed, log it */ | |
35388783 | 1020 | log_radv(NULL, "Unusual prefix length %u greater than 64", prefixlen); |
203d4df5 SS |
1021 | |
1022 | p->opt.in6_addr = *in6_addr; | |
1023 | p->opt.prefixlen = prefixlen; | |
1024 | ||
1025 | return 0; | |
1026 | } | |
1027 | ||
17347053 | 1028 | int sd_radv_route_prefix_set_lifetime(sd_radv_route_prefix *p, uint64_t lifetime_usec, uint64_t valid_until) { |
203d4df5 SS |
1029 | assert_return(p, -EINVAL); |
1030 | ||
95e104e0 YW |
1031 | p->lifetime_usec = lifetime_usec; |
1032 | p->valid_until = valid_until; | |
203d4df5 SS |
1033 | |
1034 | return 0; | |
1035 | } | |
1925f829 SS |
1036 | |
1037 | int sd_radv_pref64_prefix_new(sd_radv_pref64_prefix **ret) { | |
1038 | sd_radv_pref64_prefix *p; | |
1039 | ||
1040 | assert_return(ret, -EINVAL); | |
1041 | ||
1042 | p = new(sd_radv_pref64_prefix, 1); | |
1043 | if (!p) | |
1044 | return -ENOMEM; | |
1045 | ||
1046 | *p = (sd_radv_pref64_prefix) { | |
1047 | .n_ref = 1, | |
1048 | ||
1049 | .opt.type = RADV_OPT_PREF64, | |
1050 | .opt.length = 2, | |
1051 | }; | |
1052 | ||
1053 | *ret = p; | |
1054 | return 0; | |
1055 | } | |
1056 | ||
1057 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_radv_pref64_prefix, sd_radv_pref64_prefix, mfree); | |
1058 | ||
1059 | int sd_radv_pref64_prefix_set_prefix( | |
1060 | sd_radv_pref64_prefix *p, | |
1061 | const struct in6_addr *prefix, | |
1062 | uint8_t prefixlen, | |
1063 | uint64_t lifetime_usec) { | |
1064 | ||
1065 | uint16_t pref64_lifetime; | |
1066 | uint8_t prefixlen_code; | |
6e8f5e4c | 1067 | int r; |
1925f829 SS |
1068 | |
1069 | assert_return(p, -EINVAL); | |
1070 | assert_return(prefix, -EINVAL); | |
1071 | ||
6e8f5e4c SS |
1072 | r = pref64_prefix_length_to_plc(prefixlen, &prefixlen_code); |
1073 | if (r < 0) | |
f31fa080 ZJS |
1074 | return log_radv_errno(NULL, r, |
1075 | "Unsupported PREF64 prefix length %u. Valid lengths are 32, 40, 48, 56, 64 and 96", prefixlen); | |
1925f829 | 1076 | |
eca280c8 | 1077 | if (lifetime_usec > PREF64_MAX_LIFETIME_USEC) |
1925f829 SS |
1078 | return -EINVAL; |
1079 | ||
1080 | /* RFC 8781 - 4.1 rounding up lifetime to multiply of 8 */ | |
1081 | pref64_lifetime = DIV_ROUND_UP(lifetime_usec, 8 * USEC_PER_SEC) << 3; | |
1082 | pref64_lifetime |= prefixlen_code; | |
1083 | ||
1084 | unaligned_write_be16(&p->opt.lifetime_and_plc, pref64_lifetime); | |
1085 | memcpy(&p->opt.prefix, prefix, sizeof(p->opt.prefix)); | |
1086 | ||
1087 | p->in6_addr = *prefix; | |
1088 | p->prefixlen = prefixlen; | |
1089 | ||
1090 | return 0; | |
1091 | } |