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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
a13c50e7 | 2 | /*** |
810adae9 | 3 | Copyright © 2014 Intel Corporation. All rights reserved. |
a13c50e7 TG |
4 | ***/ |
5 | ||
23f53b99 | 6 | #include <arpa/inet.h> |
062c020f YW |
7 | #include <netinet/icmp6.h> |
8 | #include <linux/if.h> | |
f4ef1c19 | 9 | #include <linux/if_arp.h> |
a13c50e7 | 10 | |
a13c50e7 TG |
11 | #include "sd-ndisc.h" |
12 | ||
77302468 | 13 | #include "event-util.h" |
d909e4af | 14 | #include "missing_network.h" |
f09a4747 | 15 | #include "networkd-address-generation.h" |
093e3533 | 16 | #include "networkd-address.h" |
ca5ad760 | 17 | #include "networkd-dhcp6.h" |
73854ba1 | 18 | #include "networkd-manager.h" |
1e7a0e21 | 19 | #include "networkd-ndisc.h" |
76c5a0f2 | 20 | #include "networkd-queue.h" |
3b6a3bde | 21 | #include "networkd-route.h" |
3b5a4fc6 | 22 | #include "networkd-state-file.h" |
ac24e418 | 23 | #include "string-table.h" |
5f506a55 | 24 | #include "string-util.h" |
51517f9e | 25 | #include "strv.h" |
1e7a0e21 LP |
26 | |
27 | #define NDISC_DNSSL_MAX 64U | |
28 | #define NDISC_RDNSS_MAX 64U | |
fe307276 | 29 | |
062c020f YW |
30 | bool link_ipv6_accept_ra_enabled(Link *link) { |
31 | assert(link); | |
32 | ||
33 | if (!socket_ipv6_is_supported()) | |
34 | return false; | |
35 | ||
36 | if (link->flags & IFF_LOOPBACK) | |
37 | return false; | |
38 | ||
f4ef1c19 YW |
39 | if (link->iftype == ARPHRD_CAN) |
40 | return false; | |
41 | ||
062c020f YW |
42 | if (!link->network) |
43 | return false; | |
44 | ||
bd7e0a3f | 45 | if (!link_may_have_ipv6ll(link, /* check_multicast = */ true)) |
062c020f YW |
46 | return false; |
47 | ||
3773eb54 YW |
48 | assert(link->network->ipv6_accept_ra >= 0); |
49 | return link->network->ipv6_accept_ra; | |
50 | } | |
51 | ||
52 | void network_adjust_ipv6_accept_ra(Network *network) { | |
53 | assert(network); | |
54 | ||
55 | if (!FLAGS_SET(network->link_local, ADDRESS_FAMILY_IPV6)) { | |
56 | if (network->ipv6_accept_ra > 0) | |
f81ac115 | 57 | log_warning("%s: IPv6AcceptRA= is enabled but IPv6 link-local addressing is disabled or not supported. " |
3773eb54 YW |
58 | "Disabling IPv6AcceptRA=.", network->filename); |
59 | network->ipv6_accept_ra = false; | |
60 | } | |
61 | ||
62 | if (network->ipv6_accept_ra < 0) | |
062c020f | 63 | /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */ |
3773eb54 | 64 | network->ipv6_accept_ra = !FLAGS_SET(network->ip_forward, ADDRESS_FAMILY_IPV6); |
de6b6ff8 | 65 | |
75d26411 YW |
66 | /* When RouterAllowList=, PrefixAllowList= or RouteAllowList= are specified, then |
67 | * RouterDenyList=, PrefixDenyList= or RouteDenyList= are ignored, respectively. */ | |
68 | if (!set_isempty(network->ndisc_allow_listed_router)) | |
69 | network->ndisc_deny_listed_router = set_free_free(network->ndisc_deny_listed_router); | |
de6b6ff8 SS |
70 | if (!set_isempty(network->ndisc_allow_listed_prefix)) |
71 | network->ndisc_deny_listed_prefix = set_free_free(network->ndisc_deny_listed_prefix); | |
72 | if (!set_isempty(network->ndisc_allow_listed_route_prefix)) | |
73 | network->ndisc_deny_listed_route_prefix = set_free_free(network->ndisc_deny_listed_route_prefix); | |
062c020f YW |
74 | } |
75 | ||
3b6a3bde | 76 | static int ndisc_check_ready(Link *link); |
50550722 | 77 | |
3b6a3bde YW |
78 | static int ndisc_address_ready_callback(Address *address) { |
79 | Address *a; | |
50550722 | 80 | |
3b6a3bde YW |
81 | assert(address); |
82 | assert(address->link); | |
50550722 | 83 | |
3b6a3bde YW |
84 | SET_FOREACH(a, address->link->addresses) |
85 | if (a->source == NETWORK_CONFIG_SOURCE_NDISC) | |
86 | a->callback = NULL; | |
50550722 | 87 | |
3b6a3bde YW |
88 | return ndisc_check_ready(address->link); |
89 | } | |
50550722 | 90 | |
3b6a3bde YW |
91 | static int ndisc_check_ready(Link *link) { |
92 | bool found = false, ready = false; | |
93 | Address *address; | |
50550722 | 94 | |
3b6a3bde | 95 | assert(link); |
50550722 | 96 | |
3b6a3bde YW |
97 | if (link->ndisc_messages > 0) { |
98 | log_link_debug(link, "%s(): SLAAC addresses and routes are not set.", __func__); | |
99 | return 0; | |
100 | } | |
50550722 | 101 | |
3b6a3bde YW |
102 | SET_FOREACH(address, link->addresses) { |
103 | if (address->source != NETWORK_CONFIG_SOURCE_NDISC) | |
104 | continue; | |
50550722 | 105 | |
3b6a3bde | 106 | found = true; |
50550722 | 107 | |
3b6a3bde YW |
108 | if (address_is_ready(address)) { |
109 | ready = true; | |
110 | break; | |
50550722 | 111 | } |
3b6a3bde | 112 | } |
50550722 | 113 | |
3b6a3bde YW |
114 | if (found && !ready) { |
115 | SET_FOREACH(address, link->addresses) | |
116 | if (address->source == NETWORK_CONFIG_SOURCE_NDISC) | |
117 | address->callback = ndisc_address_ready_callback; | |
50550722 | 118 | |
3b6a3bde YW |
119 | log_link_debug(link, "%s(): no SLAAC address is ready.", __func__); |
120 | return 0; | |
50550722 YW |
121 | } |
122 | ||
3b6a3bde YW |
123 | link->ndisc_configured = true; |
124 | log_link_debug(link, "SLAAC addresses and routes set."); | |
50550722 | 125 | |
3b6a3bde YW |
126 | link_check_ready(link); |
127 | return 0; | |
50550722 YW |
128 | } |
129 | ||
80d62d4f | 130 | static int ndisc_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, Route *route) { |
3b015d40 TG |
131 | int r; |
132 | ||
133 | assert(link); | |
3b015d40 | 134 | |
5a07fa9d YW |
135 | r = route_configure_handler_internal(rtnl, m, link, "Could not set NDisc route"); |
136 | if (r <= 0) | |
137 | return r; | |
3b015d40 | 138 | |
3b6a3bde | 139 | r = ndisc_check_ready(link); |
50550722 | 140 | if (r < 0) |
3b6a3bde | 141 | link_enter_failed(link); |
76c5a0f2 | 142 | |
3b6a3bde | 143 | return 1; |
76c5a0f2 YW |
144 | } |
145 | ||
6f812d28 YW |
146 | static void ndisc_set_route_priority(Link *link, Route *route) { |
147 | assert(link); | |
148 | assert(route); | |
149 | ||
150 | if (route->priority_set) | |
151 | return; /* explicitly configured. */ | |
152 | ||
153 | switch (route->pref) { | |
154 | case SD_NDISC_PREFERENCE_LOW: | |
155 | route->priority = link->network->ipv6_accept_ra_route_metric_low; | |
156 | break; | |
157 | case SD_NDISC_PREFERENCE_MEDIUM: | |
158 | route->priority = link->network->ipv6_accept_ra_route_metric_medium; | |
159 | break; | |
160 | case SD_NDISC_PREFERENCE_HIGH: | |
161 | route->priority = link->network->ipv6_accept_ra_route_metric_high; | |
162 | break; | |
163 | default: | |
164 | assert_not_reached(); | |
165 | } | |
166 | } | |
167 | ||
76c5a0f2 YW |
168 | static int ndisc_request_route(Route *in, Link *link, sd_ndisc_router *rt) { |
169 | _cleanup_(route_freep) Route *route = in; | |
3b6a3bde | 170 | struct in6_addr router; |
f141b2c0 | 171 | uint8_t hop_limit = 0; |
fc4a7f13 | 172 | uint32_t mtu = 0; |
d9a95033 | 173 | bool is_new; |
76c5a0f2 YW |
174 | int r; |
175 | ||
176 | assert(route); | |
177 | assert(link); | |
f95fb199 | 178 | assert(link->network); |
76c5a0f2 YW |
179 | assert(rt); |
180 | ||
3b6a3bde YW |
181 | r = sd_ndisc_router_get_address(rt, &router); |
182 | if (r < 0) | |
183 | return r; | |
184 | ||
fc4a7f13 SS |
185 | if (link->network->ipv6_accept_ra_use_mtu) { |
186 | r = sd_ndisc_router_get_mtu(rt, &mtu); | |
187 | if (r < 0 && r != -ENODATA) | |
188 | return log_link_warning_errno(link, r, "Failed to get default router MTU from RA: %m"); | |
189 | } | |
190 | ||
f141b2c0 SS |
191 | if (link->network->ipv6_accept_ra_use_hop_limit) { |
192 | r = sd_ndisc_router_get_hop_limit(rt, &hop_limit); | |
193 | if (r < 0 && r != -ENODATA) | |
194 | return log_link_warning_errno(link, r, "Failed to get default router hop limit from RA: %m"); | |
195 | } | |
196 | ||
3b6a3bde YW |
197 | route->source = NETWORK_CONFIG_SOURCE_NDISC; |
198 | route->provider.in6 = router; | |
429dc05a YW |
199 | if (!route->table_set) |
200 | route->table = link_get_ipv6_accept_ra_route_table(link); | |
6f812d28 | 201 | ndisc_set_route_priority(link, route); |
429dc05a YW |
202 | if (!route->protocol_set) |
203 | route->protocol = RTPROT_RA; | |
f95fb199 YW |
204 | if (route->quickack < 0) |
205 | route->quickack = link->network->ipv6_accept_ra_quickack; | |
fc4a7f13 SS |
206 | if (route->mtu == 0) |
207 | route->mtu = mtu; | |
429dc05a | 208 | |
f141b2c0 SS |
209 | if (route->hop_limit == 0) |
210 | route->hop_limit = hop_limit; | |
211 | ||
d9a95033 YW |
212 | is_new = route_get(NULL, link, route, NULL) < 0; |
213 | ||
214 | r = link_request_route(link, TAKE_PTR(route), true, &link->ndisc_messages, | |
215 | ndisc_route_handler, NULL); | |
216 | if (r < 0) | |
217 | return r; | |
218 | if (r > 0 && is_new) | |
3b6a3bde | 219 | link->ndisc_configured = false; |
50550722 | 220 | |
d9a95033 | 221 | return 0; |
50550722 YW |
222 | } |
223 | ||
80d62d4f | 224 | static int ndisc_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, Address *address) { |
73854ba1 YW |
225 | int r; |
226 | ||
227 | assert(link); | |
73854ba1 | 228 | |
5a07fa9d YW |
229 | r = address_configure_handler_internal(rtnl, m, link, "Could not set NDisc address"); |
230 | if (r <= 0) | |
231 | return r; | |
73854ba1 | 232 | |
3b6a3bde | 233 | r = ndisc_check_ready(link); |
50550722 | 234 | if (r < 0) |
3b6a3bde | 235 | link_enter_failed(link); |
69203fba | 236 | |
3b6a3bde | 237 | return 1; |
69203fba YW |
238 | } |
239 | ||
76c5a0f2 YW |
240 | static int ndisc_request_address(Address *in, Link *link, sd_ndisc_router *rt) { |
241 | _cleanup_(address_freep) Address *address = in; | |
3b6a3bde | 242 | struct in6_addr router; |
d9a95033 | 243 | bool is_new; |
76c5a0f2 YW |
244 | int r; |
245 | ||
246 | assert(address); | |
247 | assert(link); | |
248 | assert(rt); | |
249 | ||
3b6a3bde YW |
250 | r = sd_ndisc_router_get_address(rt, &router); |
251 | if (r < 0) | |
76c5a0f2 YW |
252 | return r; |
253 | ||
3b6a3bde YW |
254 | address->source = NETWORK_CONFIG_SOURCE_NDISC; |
255 | address->provider.in6 = router; | |
76c5a0f2 | 256 | |
4b3590c3 TM |
257 | r = free_and_strdup_warn(&address->netlabel, link->network->ndisc_netlabel); |
258 | if (r < 0) | |
259 | return r; | |
260 | ||
d9a95033 YW |
261 | is_new = address_get(link, address, NULL) < 0; |
262 | ||
f60e6558 | 263 | r = link_request_address(link, address, &link->ndisc_messages, |
d9a95033 YW |
264 | ndisc_address_handler, NULL); |
265 | if (r < 0) | |
266 | return r; | |
267 | if (r > 0 && is_new) | |
3b6a3bde | 268 | link->ndisc_configured = false; |
3b6a3bde | 269 | |
d9a95033 | 270 | return 0; |
76c5a0f2 YW |
271 | } |
272 | ||
d5017c84 | 273 | static int ndisc_router_process_default(Link *link, sd_ndisc_router *rt) { |
91fc5135 | 274 | usec_t lifetime_usec, timestamp_usec; |
b8ce3b44 | 275 | struct in6_addr gateway; |
91fc5135 | 276 | uint16_t lifetime_sec; |
1e7a0e21 | 277 | unsigned preference; |
13e8a49a | 278 | int r; |
3b015d40 | 279 | |
3b015d40 | 280 | assert(link); |
610c0db1 | 281 | assert(link->network); |
1e7a0e21 | 282 | assert(rt); |
3b015d40 | 283 | |
610c0db1 YW |
284 | if (!link->network->ipv6_accept_ra_use_gateway && |
285 | hashmap_isempty(link->network->routes_by_section)) | |
286 | return 0; | |
287 | ||
91fc5135 | 288 | r = sd_ndisc_router_get_lifetime(rt, &lifetime_sec); |
d5017c84 | 289 | if (r < 0) |
2c5bca17 | 290 | return log_link_warning_errno(link, r, "Failed to get gateway lifetime from RA: %m"); |
d5017c84 | 291 | |
ba4e0427 | 292 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); |
91fc5135 | 293 | if (r < 0) |
2c5bca17 | 294 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
91fc5135 | 295 | |
5235d739 | 296 | lifetime_usec = sec16_to_usec(lifetime_sec, timestamp_usec); |
91fc5135 | 297 | |
b8ce3b44 | 298 | r = sd_ndisc_router_get_address(rt, &gateway); |
d5017c84 | 299 | if (r < 0) |
2c5bca17 | 300 | return log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m"); |
1e7a0e21 | 301 | |
5d003031 | 302 | if (link_get_ipv6_address(link, &gateway, 0, NULL) >= 0) { |
84dbb3fd | 303 | if (DEBUG_LOGGING) |
5eec0a08 | 304 | log_link_debug(link, "No NDisc route added, gateway %s matches local address", |
84dbb3fd | 305 | IN6_ADDR_TO_STRING(&gateway)); |
5eec0a08 | 306 | return 0; |
ce2ea782 | 307 | } |
6d7c7615 | 308 | |
1e7a0e21 | 309 | r = sd_ndisc_router_get_preference(rt, &preference); |
d5017c84 | 310 | if (r < 0) |
2c5bca17 | 311 | return log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m"); |
1e7a0e21 | 312 | |
610c0db1 YW |
313 | if (link->network->ipv6_accept_ra_use_gateway) { |
314 | _cleanup_(route_freep) Route *route = NULL; | |
1e7a0e21 | 315 | |
610c0db1 YW |
316 | r = route_new(&route); |
317 | if (r < 0) | |
318 | return log_oom(); | |
1e7a0e21 | 319 | |
610c0db1 YW |
320 | route->family = AF_INET6; |
321 | route->pref = preference; | |
322 | route->gw_family = AF_INET6; | |
323 | route->gw.in6 = gateway; | |
324 | route->lifetime_usec = lifetime_usec; | |
610c0db1 YW |
325 | |
326 | r = ndisc_request_route(TAKE_PTR(route), link, rt); | |
327 | if (r < 0) | |
2c5bca17 | 328 | return log_link_warning_errno(link, r, "Could not request default route: %m"); |
610c0db1 | 329 | } |
d5017c84 | 330 | |
1985c54f | 331 | Route *route_gw; |
2a54a044 | 332 | HASHMAP_FOREACH(route_gw, link->network->routes_by_section) { |
610c0db1 YW |
333 | _cleanup_(route_freep) Route *route = NULL; |
334 | ||
1a3a6309 | 335 | if (!route_gw->gateway_from_dhcp_or_ra) |
1985c54f YW |
336 | continue; |
337 | ||
5bb80a46 | 338 | if (route_gw->gw_family != AF_INET6) |
1985c54f YW |
339 | continue; |
340 | ||
76c5a0f2 YW |
341 | r = route_dup(route_gw, &route); |
342 | if (r < 0) | |
343 | return r; | |
344 | ||
345 | route->gw.in6 = gateway; | |
76c5a0f2 YW |
346 | if (!route->pref_set) |
347 | route->pref = preference; | |
91fc5135 | 348 | route->lifetime_usec = lifetime_usec; |
76c5a0f2 YW |
349 | |
350 | r = ndisc_request_route(TAKE_PTR(route), link, rt); | |
13e8a49a | 351 | if (r < 0) |
2c5bca17 | 352 | return log_link_warning_errno(link, r, "Could not request gateway: %m"); |
1985c54f YW |
353 | } |
354 | ||
d5017c84 | 355 | return 0; |
1e7a0e21 LP |
356 | } |
357 | ||
d5017c84 | 358 | static int ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *rt) { |
16bc8635 YW |
359 | uint32_t lifetime_valid_sec, lifetime_preferred_sec; |
360 | usec_t lifetime_valid_usec, lifetime_preferred_usec, timestamp_usec; | |
d207581f | 361 | _cleanup_set_free_ Set *addresses = NULL; |
151b8ea3 | 362 | struct in6_addr prefix, *a; |
1e7a0e21 LP |
363 | unsigned prefixlen; |
364 | int r; | |
365 | ||
366 | assert(link); | |
fbdda4bb | 367 | assert(link->network); |
1e7a0e21 LP |
368 | assert(rt); |
369 | ||
fbdda4bb YW |
370 | if (!link->network->ipv6_accept_ra_use_autonomous_prefix) |
371 | return 0; | |
372 | ||
ba4e0427 | 373 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); |
d5017c84 | 374 | if (r < 0) |
2c5bca17 | 375 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
6554550f | 376 | |
151b8ea3 YW |
377 | r = sd_ndisc_router_prefix_get_address(rt, &prefix); |
378 | if (r < 0) | |
2c5bca17 | 379 | return log_link_warning_errno(link, r, "Failed to get prefix address: %m"); |
151b8ea3 | 380 | |
1e7a0e21 | 381 | r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen); |
d5017c84 | 382 | if (r < 0) |
2c5bca17 | 383 | return log_link_warning_errno(link, r, "Failed to get prefix length: %m"); |
1e7a0e21 | 384 | |
868bd1aa | 385 | /* ndisc_generate_addresses() below requires the prefix length <= 64. */ |
151b8ea3 | 386 | if (prefixlen > 64) { |
c71384a9 ZJS |
387 | log_link_debug(link, "Prefix is longer than 64, ignoring autonomous prefix %s.", |
388 | IN6_ADDR_PREFIX_TO_STRING(&prefix, prefixlen)); | |
151b8ea3 YW |
389 | return 0; |
390 | } | |
391 | ||
16bc8635 | 392 | r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_valid_sec); |
d5017c84 | 393 | if (r < 0) |
2c5bca17 | 394 | return log_link_warning_errno(link, r, "Failed to get prefix valid lifetime: %m"); |
1e7a0e21 | 395 | |
16bc8635 | 396 | r = sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime_preferred_sec); |
d5017c84 | 397 | if (r < 0) |
2c5bca17 | 398 | return log_link_warning_errno(link, r, "Failed to get prefix preferred lifetime: %m"); |
3b015d40 | 399 | |
92bdc3ff | 400 | /* The preferred lifetime is never greater than the valid lifetime */ |
16bc8635 | 401 | if (lifetime_preferred_sec > lifetime_valid_sec) |
d5017c84 | 402 | return 0; |
92bdc3ff | 403 | |
5235d739 YW |
404 | lifetime_valid_usec = sec_to_usec(lifetime_valid_sec, timestamp_usec); |
405 | lifetime_preferred_usec = sec_to_usec(lifetime_preferred_sec, timestamp_usec); | |
16bc8635 | 406 | |
868bd1aa | 407 | r = ndisc_generate_addresses(link, &prefix, prefixlen, &addresses); |
5f506a55 | 408 | if (r < 0) |
2c5bca17 | 409 | return log_link_warning_errno(link, r, "Failed to generate SLAAC addresses: %m"); |
c24c83dc | 410 | |
90e74a66 | 411 | SET_FOREACH(a, addresses) { |
76c5a0f2 | 412 | _cleanup_(address_freep) Address *address = NULL; |
13e8a49a | 413 | |
76c5a0f2 YW |
414 | r = address_new(&address); |
415 | if (r < 0) | |
416 | return log_oom(); | |
417 | ||
418 | address->family = AF_INET6; | |
25db3aea | 419 | address->in_addr.in6 = *a; |
76c5a0f2 YW |
420 | address->prefixlen = prefixlen; |
421 | address->flags = IFA_F_NOPREFIXROUTE|IFA_F_MANAGETEMPADDR; | |
16bc8635 YW |
422 | address->lifetime_valid_usec = lifetime_valid_usec; |
423 | address->lifetime_preferred_usec = lifetime_preferred_usec; | |
fe841414 | 424 | |
76c5a0f2 | 425 | r = ndisc_request_address(TAKE_PTR(address), link, rt); |
13e8a49a | 426 | if (r < 0) |
2c5bca17 | 427 | return log_link_warning_errno(link, r, "Could not request SLAAC address: %m"); |
3b015d40 | 428 | } |
d5017c84 YW |
429 | |
430 | return 0; | |
3b015d40 TG |
431 | } |
432 | ||
d5017c84 | 433 | static int ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt) { |
8e766630 | 434 | _cleanup_(route_freep) Route *route = NULL; |
91fc5135 YW |
435 | usec_t timestamp_usec; |
436 | uint32_t lifetime_sec; | |
167c7ae5 | 437 | struct in6_addr prefix; |
1e7a0e21 | 438 | unsigned prefixlen; |
3b015d40 TG |
439 | int r; |
440 | ||
3b015d40 | 441 | assert(link); |
fbdda4bb | 442 | assert(link->network); |
1e7a0e21 | 443 | assert(rt); |
3b015d40 | 444 | |
fbdda4bb YW |
445 | if (!link->network->ipv6_accept_ra_use_onlink_prefix) |
446 | return 0; | |
447 | ||
09845af5 YW |
448 | r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_sec); |
449 | if (r < 0) | |
2c5bca17 | 450 | return log_link_warning_errno(link, r, "Failed to get prefix lifetime: %m"); |
09845af5 | 451 | |
ba4e0427 | 452 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); |
d5017c84 | 453 | if (r < 0) |
2c5bca17 | 454 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
1e7a0e21 | 455 | |
167c7ae5 YW |
456 | r = sd_ndisc_router_prefix_get_address(rt, &prefix); |
457 | if (r < 0) | |
2c5bca17 | 458 | return log_link_warning_errno(link, r, "Failed to get prefix address: %m"); |
167c7ae5 | 459 | |
1e7a0e21 | 460 | r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen); |
d5017c84 | 461 | if (r < 0) |
2c5bca17 | 462 | return log_link_warning_errno(link, r, "Failed to get prefix length: %m"); |
1e7a0e21 | 463 | |
3b015d40 | 464 | r = route_new(&route); |
d5017c84 | 465 | if (r < 0) |
13e8a49a | 466 | return log_oom(); |
3b015d40 | 467 | |
3b015d40 | 468 | route->family = AF_INET6; |
167c7ae5 | 469 | route->dst.in6 = prefix; |
3b015d40 | 470 | route->dst_prefixlen = prefixlen; |
5235d739 | 471 | route->lifetime_usec = sec_to_usec(lifetime_sec, timestamp_usec); |
3b015d40 | 472 | |
76c5a0f2 | 473 | r = ndisc_request_route(TAKE_PTR(route), link, rt); |
13e8a49a | 474 | if (r < 0) |
2c5bca17 | 475 | return log_link_warning_errno(link, r, "Could not request prefix route: %m"); |
d5017c84 YW |
476 | |
477 | return 0; | |
3b015d40 TG |
478 | } |
479 | ||
fbdda4bb YW |
480 | static int ndisc_router_process_prefix(Link *link, sd_ndisc_router *rt) { |
481 | unsigned prefixlen; | |
482 | struct in6_addr a; | |
483 | uint8_t flags; | |
484 | int r; | |
485 | ||
486 | assert(link); | |
487 | assert(link->network); | |
488 | assert(rt); | |
489 | ||
490 | r = sd_ndisc_router_prefix_get_address(rt, &a); | |
491 | if (r < 0) | |
2c5bca17 | 492 | return log_link_warning_errno(link, r, "Failed to get prefix address: %m"); |
fbdda4bb | 493 | |
a115c60e YW |
494 | /* RFC 4861 Section 4.6.2: |
495 | * A router SHOULD NOT send a prefix option for the link-local prefix and a host SHOULD ignore such | |
496 | * a prefix option. */ | |
497 | if (in6_addr_is_link_local(&a)) { | |
498 | log_link_debug(link, "Received link-local prefix, ignoring autonomous prefix."); | |
499 | return 0; | |
500 | } | |
501 | ||
fbdda4bb YW |
502 | r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen); |
503 | if (r < 0) | |
2c5bca17 | 504 | return log_link_warning_errno(link, r, "Failed to get prefix length: %m"); |
fbdda4bb YW |
505 | |
506 | if (in6_prefix_is_filtered(&a, prefixlen, link->network->ndisc_allow_listed_prefix, link->network->ndisc_deny_listed_prefix)) { | |
c71384a9 ZJS |
507 | if (DEBUG_LOGGING) |
508 | log_link_debug(link, "Prefix '%s' is %s, ignoring", | |
509 | !set_isempty(link->network->ndisc_allow_listed_prefix) ? "not in allow list" | |
510 | : "in deny list", | |
511 | IN6_ADDR_PREFIX_TO_STRING(&a, prefixlen)); | |
fbdda4bb YW |
512 | return 0; |
513 | } | |
514 | ||
515 | r = sd_ndisc_router_prefix_get_flags(rt, &flags); | |
516 | if (r < 0) | |
2c5bca17 | 517 | return log_link_warning_errno(link, r, "Failed to get RA prefix flags: %m"); |
fbdda4bb YW |
518 | |
519 | if (FLAGS_SET(flags, ND_OPT_PI_FLAG_ONLINK)) { | |
520 | r = ndisc_router_process_onlink_prefix(link, rt); | |
521 | if (r < 0) | |
522 | return r; | |
523 | } | |
524 | ||
525 | if (FLAGS_SET(flags, ND_OPT_PI_FLAG_AUTO)) { | |
526 | r = ndisc_router_process_autonomous_prefix(link, rt); | |
527 | if (r < 0) | |
528 | return r; | |
529 | } | |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
d5017c84 | 534 | static int ndisc_router_process_route(Link *link, sd_ndisc_router *rt) { |
8e766630 | 535 | _cleanup_(route_freep) Route *route = NULL; |
1e7a0e21 | 536 | unsigned preference, prefixlen; |
91fc5135 YW |
537 | struct in6_addr gateway, dst; |
538 | uint32_t lifetime_sec; | |
539 | usec_t timestamp_usec; | |
7a695d8e | 540 | int r; |
a13c50e7 TG |
541 | |
542 | assert(link); | |
a13c50e7 | 543 | |
610c0db1 YW |
544 | if (!link->network->ipv6_accept_ra_use_route_prefix) |
545 | return 0; | |
546 | ||
91fc5135 | 547 | r = sd_ndisc_router_route_get_lifetime(rt, &lifetime_sec); |
d5017c84 | 548 | if (r < 0) |
2c5bca17 | 549 | return log_link_warning_errno(link, r, "Failed to get route lifetime from RA: %m"); |
d5017c84 | 550 | |
b8ce3b44 | 551 | r = sd_ndisc_router_route_get_address(rt, &dst); |
d5017c84 | 552 | if (r < 0) |
2c5bca17 | 553 | return log_link_warning_errno(link, r, "Failed to get route destination address: %m"); |
3b015d40 | 554 | |
c995fa02 YW |
555 | r = sd_ndisc_router_route_get_prefixlen(rt, &prefixlen); |
556 | if (r < 0) | |
2c5bca17 | 557 | return log_link_warning_errno(link, r, "Failed to get route prefix length: %m"); |
c995fa02 | 558 | |
80bfc3b9 YW |
559 | if (in6_addr_is_null(&dst) && prefixlen == 0) { |
560 | log_link_debug(link, "Route prefix is ::/0, ignoring"); | |
561 | return 0; | |
562 | } | |
563 | ||
c71384a9 ZJS |
564 | if (in6_prefix_is_filtered(&dst, prefixlen, |
565 | link->network->ndisc_allow_listed_route_prefix, | |
566 | link->network->ndisc_deny_listed_route_prefix)) { | |
16c89e64 | 567 | |
c71384a9 ZJS |
568 | if (DEBUG_LOGGING) |
569 | log_link_debug(link, "Route prefix %s is %s, ignoring", | |
570 | !set_isempty(link->network->ndisc_allow_listed_route_prefix) ? "not in allow list" | |
571 | : "in deny list", | |
572 | IN6_ADDR_PREFIX_TO_STRING(&dst, prefixlen)); | |
16c89e64 DP |
573 | return 0; |
574 | } | |
575 | ||
b8ce3b44 | 576 | r = sd_ndisc_router_get_address(rt, &gateway); |
19e334bd | 577 | if (r < 0) |
2c5bca17 | 578 | return log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m"); |
19e334bd | 579 | |
5d003031 | 580 | if (link_get_ipv6_address(link, &gateway, 0, NULL) >= 0) { |
84dbb3fd ZJS |
581 | if (DEBUG_LOGGING) |
582 | log_link_debug(link, "Advertised route gateway %s is local to the link, ignoring route", | |
583 | IN6_ADDR_TO_STRING(&gateway)); | |
22101916 DP |
584 | return 0; |
585 | } | |
586 | ||
1e7a0e21 | 587 | r = sd_ndisc_router_route_get_preference(rt, &preference); |
3912d49d SS |
588 | if (r == -ENOTSUP) { |
589 | log_link_debug_errno(link, r, "Received route prefix with unsupported preference, ignoring: %m"); | |
590 | return 0; | |
591 | } | |
d5017c84 | 592 | if (r < 0) |
2c5bca17 | 593 | return log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m"); |
1e7a0e21 | 594 | |
ba4e0427 | 595 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); |
d5017c84 | 596 | if (r < 0) |
2c5bca17 | 597 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
3b015d40 TG |
598 | |
599 | r = route_new(&route); | |
d5017c84 | 600 | if (r < 0) |
13e8a49a | 601 | return log_oom(); |
3b015d40 | 602 | |
3b015d40 | 603 | route->family = AF_INET6; |
1e7a0e21 | 604 | route->pref = preference; |
b8ce3b44 | 605 | route->gw.in6 = gateway; |
6dd53981 | 606 | route->gw_family = AF_INET6; |
b8ce3b44 | 607 | route->dst.in6 = dst; |
1e7a0e21 | 608 | route->dst_prefixlen = prefixlen; |
5235d739 | 609 | route->lifetime_usec = sec_to_usec(lifetime_sec, timestamp_usec); |
3b015d40 | 610 | |
76c5a0f2 | 611 | r = ndisc_request_route(TAKE_PTR(route), link, rt); |
13e8a49a | 612 | if (r < 0) |
2c5bca17 | 613 | return log_link_warning_errno(link, r, "Could not request additional route: %m"); |
d5017c84 YW |
614 | |
615 | return 0; | |
9d96e6c3 | 616 | } |
a13c50e7 | 617 | |
7a08d314 | 618 | static void ndisc_rdnss_hash_func(const NDiscRDNSS *x, struct siphash *state) { |
1e7a0e21 LP |
619 | siphash24_compress(&x->address, sizeof(x->address), state); |
620 | } | |
621 | ||
7a08d314 | 622 | static int ndisc_rdnss_compare_func(const NDiscRDNSS *a, const NDiscRDNSS *b) { |
1e7a0e21 LP |
623 | return memcmp(&a->address, &b->address, sizeof(a->address)); |
624 | } | |
625 | ||
b0b97766 YW |
626 | DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR( |
627 | ndisc_rdnss_hash_ops, | |
628 | NDiscRDNSS, | |
629 | ndisc_rdnss_hash_func, | |
630 | ndisc_rdnss_compare_func, | |
631 | free); | |
1e7a0e21 | 632 | |
d5017c84 | 633 | static int ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) { |
03ccc4b4 YW |
634 | usec_t lifetime_usec, timestamp_usec; |
635 | uint32_t lifetime_sec; | |
1e7a0e21 | 636 | const struct in6_addr *a; |
50550722 | 637 | struct in6_addr router; |
8aba7b83 | 638 | bool updated = false, logged_about_too_many = false; |
13e8a49a | 639 | int n, r; |
1e7a0e21 LP |
640 | |
641 | assert(link); | |
ad0b2df6 | 642 | assert(link->network); |
1e7a0e21 LP |
643 | assert(rt); |
644 | ||
ad0b2df6 YW |
645 | if (!link->network->ipv6_accept_ra_use_dns) |
646 | return 0; | |
647 | ||
50550722 YW |
648 | r = sd_ndisc_router_get_address(rt, &router); |
649 | if (r < 0) | |
2c5bca17 | 650 | return log_link_warning_errno(link, r, "Failed to get router address from RA: %m"); |
50550722 | 651 | |
ba4e0427 | 652 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); |
d5017c84 | 653 | if (r < 0) |
2c5bca17 | 654 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
1e7a0e21 | 655 | |
03ccc4b4 | 656 | r = sd_ndisc_router_rdnss_get_lifetime(rt, &lifetime_sec); |
d5017c84 | 657 | if (r < 0) |
2c5bca17 | 658 | return log_link_warning_errno(link, r, "Failed to get RDNSS lifetime: %m"); |
1e7a0e21 | 659 | |
5235d739 | 660 | lifetime_usec = sec_to_usec(lifetime_sec, timestamp_usec); |
03ccc4b4 | 661 | |
1e7a0e21 | 662 | n = sd_ndisc_router_rdnss_get_addresses(rt, &a); |
d5017c84 | 663 | if (n < 0) |
2c5bca17 | 664 | return log_link_warning_errno(link, n, "Failed to get RDNSS addresses: %m"); |
1e7a0e21 | 665 | |
b0b97766 YW |
666 | for (int j = 0; j < n; j++) { |
667 | _cleanup_free_ NDiscRDNSS *x = NULL; | |
3b6a3bde | 668 | NDiscRDNSS *rdnss, d = { |
b0b97766 YW |
669 | .address = a[j], |
670 | }; | |
1e7a0e21 | 671 | |
af2aea8b YW |
672 | if (lifetime_usec == 0) { |
673 | /* The entry is outdated. */ | |
674 | free(set_remove(link->ndisc_rdnss, &d)); | |
675 | updated = true; | |
676 | continue; | |
677 | } | |
678 | ||
b0b97766 YW |
679 | rdnss = set_get(link->ndisc_rdnss, &d); |
680 | if (rdnss) { | |
50550722 | 681 | rdnss->router = router; |
03ccc4b4 | 682 | rdnss->lifetime_usec = lifetime_usec; |
1e7a0e21 LP |
683 | continue; |
684 | } | |
685 | ||
8aba7b83 YW |
686 | if (set_size(link->ndisc_rdnss) >= NDISC_RDNSS_MAX) { |
687 | if (!logged_about_too_many) | |
688 | log_link_warning(link, "Too many RDNSS records per link. Only first %u records will be used.", NDISC_RDNSS_MAX); | |
689 | logged_about_too_many = true; | |
690 | continue; | |
691 | } | |
692 | ||
d5017c84 YW |
693 | x = new(NDiscRDNSS, 1); |
694 | if (!x) | |
695 | return log_oom(); | |
1e7a0e21 | 696 | |
d5017c84 | 697 | *x = (NDiscRDNSS) { |
b0b97766 | 698 | .address = a[j], |
50550722 | 699 | .router = router, |
03ccc4b4 | 700 | .lifetime_usec = lifetime_usec, |
d5017c84 | 701 | }; |
1e7a0e21 | 702 | |
35e601d4 | 703 | r = set_ensure_consume(&link->ndisc_rdnss, &ndisc_rdnss_hash_ops, TAKE_PTR(x)); |
d5017c84 YW |
704 | if (r < 0) |
705 | return log_oom(); | |
1e7a0e21 | 706 | assert(r > 0); |
9092113d YW |
707 | |
708 | updated = true; | |
1e7a0e21 | 709 | } |
d5017c84 | 710 | |
9092113d YW |
711 | if (updated) |
712 | link_dirty(link); | |
713 | ||
d5017c84 | 714 | return 0; |
1e7a0e21 LP |
715 | } |
716 | ||
7a08d314 | 717 | static void ndisc_dnssl_hash_func(const NDiscDNSSL *x, struct siphash *state) { |
f281fc1e | 718 | siphash24_compress_string(NDISC_DNSSL_DOMAIN(x), state); |
1e7a0e21 LP |
719 | } |
720 | ||
7a08d314 | 721 | static int ndisc_dnssl_compare_func(const NDiscDNSSL *a, const NDiscDNSSL *b) { |
1e7a0e21 LP |
722 | return strcmp(NDISC_DNSSL_DOMAIN(a), NDISC_DNSSL_DOMAIN(b)); |
723 | } | |
724 | ||
b0b97766 YW |
725 | DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR( |
726 | ndisc_dnssl_hash_ops, | |
727 | NDiscDNSSL, | |
728 | ndisc_dnssl_hash_func, | |
729 | ndisc_dnssl_compare_func, | |
730 | free); | |
1e7a0e21 | 731 | |
13e8a49a | 732 | static int ndisc_router_process_dnssl(Link *link, sd_ndisc_router *rt) { |
1e7a0e21 | 733 | _cleanup_strv_free_ char **l = NULL; |
03ccc4b4 | 734 | usec_t lifetime_usec, timestamp_usec; |
50550722 | 735 | struct in6_addr router; |
03ccc4b4 | 736 | uint32_t lifetime_sec; |
8aba7b83 | 737 | bool updated = false, logged_about_too_many = false; |
1e7a0e21 LP |
738 | int r; |
739 | ||
740 | assert(link); | |
ad0b2df6 | 741 | assert(link->network); |
1e7a0e21 LP |
742 | assert(rt); |
743 | ||
ad0b2df6 YW |
744 | if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_NO) |
745 | return 0; | |
746 | ||
50550722 YW |
747 | r = sd_ndisc_router_get_address(rt, &router); |
748 | if (r < 0) | |
2c5bca17 | 749 | return log_link_warning_errno(link, r, "Failed to get router address from RA: %m"); |
50550722 | 750 | |
ba4e0427 | 751 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); |
13e8a49a | 752 | if (r < 0) |
2c5bca17 | 753 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
1e7a0e21 | 754 | |
03ccc4b4 | 755 | r = sd_ndisc_router_dnssl_get_lifetime(rt, &lifetime_sec); |
13e8a49a | 756 | if (r < 0) |
2c5bca17 | 757 | return log_link_warning_errno(link, r, "Failed to get DNSSL lifetime: %m"); |
1e7a0e21 | 758 | |
5235d739 | 759 | lifetime_usec = sec_to_usec(lifetime_sec, timestamp_usec); |
03ccc4b4 | 760 | |
1e7a0e21 | 761 | r = sd_ndisc_router_dnssl_get_domains(rt, &l); |
13e8a49a | 762 | if (r < 0) |
2c5bca17 | 763 | return log_link_warning_errno(link, r, "Failed to get DNSSL addresses: %m"); |
1e7a0e21 | 764 | |
b0b97766 YW |
765 | STRV_FOREACH(j, l) { |
766 | _cleanup_free_ NDiscDNSSL *s = NULL; | |
3b6a3bde | 767 | NDiscDNSSL *dnssl; |
1e7a0e21 | 768 | |
b0b97766 YW |
769 | s = malloc0(ALIGN(sizeof(NDiscDNSSL)) + strlen(*j) + 1); |
770 | if (!s) | |
771 | return log_oom(); | |
1e7a0e21 | 772 | |
b0b97766 | 773 | strcpy(NDISC_DNSSL_DOMAIN(s), *j); |
1e7a0e21 | 774 | |
af2aea8b YW |
775 | if (lifetime_usec == 0) { |
776 | /* The entry is outdated. */ | |
777 | free(set_remove(link->ndisc_dnssl, s)); | |
778 | updated = true; | |
779 | continue; | |
780 | } | |
781 | ||
b0b97766 YW |
782 | dnssl = set_get(link->ndisc_dnssl, s); |
783 | if (dnssl) { | |
50550722 | 784 | dnssl->router = router; |
03ccc4b4 | 785 | dnssl->lifetime_usec = lifetime_usec; |
1e7a0e21 LP |
786 | continue; |
787 | } | |
788 | ||
8aba7b83 YW |
789 | if (set_size(link->ndisc_dnssl) >= NDISC_DNSSL_MAX) { |
790 | if (!logged_about_too_many) | |
791 | log_link_warning(link, "Too many DNSSL records per link. Only first %u records will be used.", NDISC_DNSSL_MAX); | |
792 | logged_about_too_many = true; | |
793 | continue; | |
794 | } | |
795 | ||
50550722 | 796 | s->router = router; |
03ccc4b4 | 797 | s->lifetime_usec = lifetime_usec; |
1e7a0e21 | 798 | |
35e601d4 | 799 | r = set_ensure_consume(&link->ndisc_dnssl, &ndisc_dnssl_hash_ops, TAKE_PTR(s)); |
13e8a49a YW |
800 | if (r < 0) |
801 | return log_oom(); | |
1e7a0e21 | 802 | assert(r > 0); |
9092113d YW |
803 | |
804 | updated = true; | |
1e7a0e21 | 805 | } |
13e8a49a | 806 | |
9092113d YW |
807 | if (updated) |
808 | link_dirty(link); | |
809 | ||
13e8a49a | 810 | return 0; |
1e7a0e21 LP |
811 | } |
812 | ||
64de00c4 YW |
813 | static NDiscCaptivePortal* ndisc_captive_portal_free(NDiscCaptivePortal *x) { |
814 | if (!x) | |
815 | return NULL; | |
816 | ||
817 | free(x->captive_portal); | |
818 | return mfree(x); | |
819 | } | |
820 | ||
821 | DEFINE_TRIVIAL_CLEANUP_FUNC(NDiscCaptivePortal*, ndisc_captive_portal_free); | |
822 | ||
823 | static void ndisc_captive_portal_hash_func(const NDiscCaptivePortal *x, struct siphash *state) { | |
824 | assert(x); | |
825 | siphash24_compress_string(x->captive_portal, state); | |
826 | } | |
827 | ||
828 | static int ndisc_captive_portal_compare_func(const NDiscCaptivePortal *a, const NDiscCaptivePortal *b) { | |
829 | assert(a); | |
830 | assert(b); | |
831 | return strcmp_ptr(a->captive_portal, b->captive_portal); | |
832 | } | |
833 | ||
834 | DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR( | |
835 | ndisc_captive_portal_hash_ops, | |
836 | NDiscCaptivePortal, | |
837 | ndisc_captive_portal_hash_func, | |
838 | ndisc_captive_portal_compare_func, | |
535134bc | 839 | ndisc_captive_portal_free); |
64de00c4 YW |
840 | |
841 | static int ndisc_router_process_captive_portal(Link *link, sd_ndisc_router *rt) { | |
842 | _cleanup_(ndisc_captive_portal_freep) NDiscCaptivePortal *new_entry = NULL; | |
843 | _cleanup_free_ char *captive_portal = NULL; | |
844 | usec_t lifetime_usec, timestamp_usec; | |
845 | NDiscCaptivePortal *exist; | |
846 | struct in6_addr router; | |
847 | uint16_t lifetime_sec; | |
848 | const char *uri; | |
849 | size_t len; | |
850 | int r; | |
851 | ||
852 | assert(link); | |
853 | assert(link->network); | |
854 | assert(rt); | |
855 | ||
856 | if (!link->network->ipv6_accept_ra_use_captive_portal) | |
857 | return 0; | |
858 | ||
859 | r = sd_ndisc_router_get_address(rt, &router); | |
860 | if (r < 0) | |
861 | return log_link_warning_errno(link, r, "Failed to get router address from RA: %m"); | |
862 | ||
863 | r = sd_ndisc_router_get_lifetime(rt, &lifetime_sec); | |
864 | if (r < 0) | |
865 | return log_link_warning_errno(link, r, "Failed to get lifetime of RA message: %m"); | |
866 | ||
867 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); | |
868 | if (r < 0) | |
869 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); | |
870 | ||
871 | lifetime_usec = sec16_to_usec(lifetime_sec, timestamp_usec); | |
872 | ||
873 | r = sd_ndisc_router_captive_portal_get_uri(rt, &uri, &len); | |
874 | if (r < 0) | |
875 | return log_link_warning_errno(link, r, "Failed to get captive portal from RA: %m"); | |
876 | ||
877 | if (len == 0) | |
878 | return 0; | |
879 | ||
880 | r = make_cstring(uri, len, MAKE_CSTRING_REFUSE_TRAILING_NUL, &captive_portal); | |
881 | if (r < 0) | |
882 | return log_link_warning_errno(link, r, "Failed to convert captive portal URI: %m"); | |
883 | ||
884 | if (!in_charset(captive_portal, URI_VALID)) | |
885 | return log_link_debug_errno(link, SYNTHETIC_ERRNO(EBADMSG), "Received invalid captive portal, ignoring."); | |
886 | ||
887 | exist = set_get(link->ndisc_captive_portals, &(NDiscCaptivePortal) { .captive_portal = captive_portal }); | |
888 | if (exist) { | |
889 | /* update existing entry */ | |
890 | exist->router = router; | |
891 | exist->lifetime_usec = lifetime_usec; | |
892 | return 0; | |
893 | } | |
894 | ||
895 | new_entry = new(NDiscCaptivePortal, 1); | |
896 | if (!new_entry) | |
897 | return log_oom(); | |
898 | ||
899 | *new_entry = (NDiscCaptivePortal) { | |
900 | .router = router, | |
901 | .lifetime_usec = lifetime_usec, | |
902 | .captive_portal = TAKE_PTR(captive_portal), | |
903 | }; | |
904 | ||
905 | r = set_ensure_put(&link->ndisc_captive_portals, &ndisc_captive_portal_hash_ops, new_entry); | |
906 | if (r < 0) | |
907 | return log_oom(); | |
908 | assert(r > 0); | |
909 | TAKE_PTR(new_entry); | |
910 | ||
911 | link_dirty(link); | |
912 | return 0; | |
913 | } | |
914 | ||
e8c9b5b0 | 915 | static int ndisc_router_process_options(Link *link, sd_ndisc_router *rt) { |
fbdda4bb YW |
916 | int r; |
917 | ||
1e7a0e21 | 918 | assert(link); |
55d3fdcf | 919 | assert(link->network); |
1e7a0e21 LP |
920 | assert(rt); |
921 | ||
fbdda4bb | 922 | for (r = sd_ndisc_router_option_rewind(rt); ; r = sd_ndisc_router_option_next(rt)) { |
1e7a0e21 LP |
923 | uint8_t type; |
924 | ||
e8c9b5b0 | 925 | if (r < 0) |
2c5bca17 | 926 | return log_link_warning_errno(link, r, "Failed to iterate through options: %m"); |
1e7a0e21 | 927 | if (r == 0) /* EOF */ |
13e8a49a | 928 | return 0; |
1e7a0e21 LP |
929 | |
930 | r = sd_ndisc_router_option_get_type(rt, &type); | |
e8c9b5b0 | 931 | if (r < 0) |
2c5bca17 | 932 | return log_link_warning_errno(link, r, "Failed to get RA option type: %m"); |
1e7a0e21 LP |
933 | |
934 | switch (type) { | |
fbdda4bb YW |
935 | case SD_NDISC_OPTION_PREFIX_INFORMATION: |
936 | r = ndisc_router_process_prefix(link, rt); | |
1e7a0e21 | 937 | break; |
1e7a0e21 LP |
938 | |
939 | case SD_NDISC_OPTION_ROUTE_INFORMATION: | |
13e8a49a | 940 | r = ndisc_router_process_route(link, rt); |
1e7a0e21 LP |
941 | break; |
942 | ||
943 | case SD_NDISC_OPTION_RDNSS: | |
ad0b2df6 | 944 | r = ndisc_router_process_rdnss(link, rt); |
1e7a0e21 LP |
945 | break; |
946 | ||
947 | case SD_NDISC_OPTION_DNSSL: | |
ad0b2df6 | 948 | r = ndisc_router_process_dnssl(link, rt); |
1e7a0e21 | 949 | break; |
9747955d RP |
950 | case SD_NDISC_OPTION_CAPTIVE_PORTAL: |
951 | r = ndisc_router_process_captive_portal(link, rt); | |
952 | break; | |
1e7a0e21 | 953 | } |
5908d864 YW |
954 | if (r < 0 && r != -EBADMSG) |
955 | return r; | |
1e7a0e21 LP |
956 | } |
957 | } | |
958 | ||
94e6d37c YW |
959 | static int ndisc_drop_outdated(Link *link, usec_t timestamp_usec) { |
960 | bool updated = false; | |
961 | NDiscDNSSL *dnssl; | |
962 | NDiscRDNSS *rdnss; | |
64de00c4 | 963 | NDiscCaptivePortal *cp; |
94e6d37c YW |
964 | Address *address; |
965 | Route *route; | |
966 | int r = 0, k; | |
967 | ||
968 | assert(link); | |
969 | ||
970 | /* If an address or friends is already assigned, but not valid anymore, then refuse to update it, | |
971 | * and let's immediately remove it. | |
972 | * See RFC4862, section 5.5.3.e. But the following logic is deviated from RFC4862 by honoring all | |
973 | * valid lifetimes to improve the reaction of SLAAC to renumbering events. | |
974 | * See draft-ietf-6man-slaac-renum-02, section 4.2. */ | |
975 | ||
976 | SET_FOREACH(route, link->routes) { | |
977 | if (route->source != NETWORK_CONFIG_SOURCE_NDISC) | |
978 | continue; | |
979 | ||
980 | if (route->lifetime_usec >= timestamp_usec) | |
981 | continue; /* the route is still valid */ | |
982 | ||
983 | k = route_remove_and_drop(route); | |
984 | if (k < 0) | |
985 | r = log_link_warning_errno(link, k, "Failed to remove outdated SLAAC route, ignoring: %m"); | |
986 | } | |
987 | ||
988 | SET_FOREACH(address, link->addresses) { | |
989 | if (address->source != NETWORK_CONFIG_SOURCE_NDISC) | |
990 | continue; | |
991 | ||
992 | if (address->lifetime_valid_usec >= timestamp_usec) | |
993 | continue; /* the address is still valid */ | |
994 | ||
995 | k = address_remove_and_drop(address); | |
996 | if (k < 0) | |
997 | r = log_link_warning_errno(link, k, "Failed to remove outdated SLAAC address, ignoring: %m"); | |
998 | } | |
999 | ||
1000 | SET_FOREACH(rdnss, link->ndisc_rdnss) { | |
1001 | if (rdnss->lifetime_usec >= timestamp_usec) | |
1002 | continue; /* the DNS server is still valid */ | |
1003 | ||
1004 | free(set_remove(link->ndisc_rdnss, rdnss)); | |
1005 | updated = true; | |
1006 | } | |
1007 | ||
1008 | SET_FOREACH(dnssl, link->ndisc_dnssl) { | |
1009 | if (dnssl->lifetime_usec >= timestamp_usec) | |
1010 | continue; /* the DNS domain is still valid */ | |
1011 | ||
1012 | free(set_remove(link->ndisc_dnssl, dnssl)); | |
1013 | updated = true; | |
1014 | } | |
1015 | ||
64de00c4 YW |
1016 | SET_FOREACH(cp, link->ndisc_captive_portals) { |
1017 | if (cp->lifetime_usec >= timestamp_usec) | |
1018 | continue; /* the captive portal is still valid */ | |
1019 | ||
75a91226 | 1020 | ndisc_captive_portal_free(set_remove(link->ndisc_captive_portals, cp)); |
64de00c4 YW |
1021 | updated = true; |
1022 | } | |
1023 | ||
94e6d37c YW |
1024 | if (updated) |
1025 | link_dirty(link); | |
1026 | ||
1027 | return r; | |
1028 | } | |
1029 | ||
77302468 YW |
1030 | static int ndisc_setup_expire(Link *link); |
1031 | ||
1032 | static int ndisc_expire_handler(sd_event_source *s, uint64_t usec, void *userdata) { | |
1033 | Link *link = ASSERT_PTR(userdata); | |
1034 | usec_t now_usec; | |
1035 | ||
1036 | assert(link->manager); | |
1037 | ||
1038 | assert_se(sd_event_now(link->manager->event, CLOCK_BOOTTIME, &now_usec) >= 0); | |
1039 | ||
1040 | (void) ndisc_drop_outdated(link, now_usec); | |
1041 | (void) ndisc_setup_expire(link); | |
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | static int ndisc_setup_expire(Link *link) { | |
1046 | usec_t lifetime_usec = USEC_INFINITY; | |
64de00c4 | 1047 | NDiscCaptivePortal *cp; |
77302468 YW |
1048 | NDiscDNSSL *dnssl; |
1049 | NDiscRDNSS *rdnss; | |
1050 | Address *address; | |
1051 | Route *route; | |
1052 | int r; | |
1053 | ||
1054 | assert(link); | |
1055 | assert(link->manager); | |
1056 | ||
1057 | SET_FOREACH(route, link->routes) { | |
1058 | if (route->source != NETWORK_CONFIG_SOURCE_NDISC) | |
1059 | continue; | |
1060 | ||
1061 | if (!route_exists(route)) | |
1062 | continue; | |
1063 | ||
1064 | lifetime_usec = MIN(lifetime_usec, route->lifetime_usec); | |
1065 | } | |
1066 | ||
1067 | SET_FOREACH(address, link->addresses) { | |
1068 | if (address->source != NETWORK_CONFIG_SOURCE_NDISC) | |
1069 | continue; | |
1070 | ||
1071 | if (!address_exists(address)) | |
1072 | continue; | |
1073 | ||
1074 | lifetime_usec = MIN(lifetime_usec, address->lifetime_valid_usec); | |
1075 | } | |
1076 | ||
1077 | SET_FOREACH(rdnss, link->ndisc_rdnss) | |
1078 | lifetime_usec = MIN(lifetime_usec, rdnss->lifetime_usec); | |
1079 | ||
1080 | SET_FOREACH(dnssl, link->ndisc_dnssl) | |
1081 | lifetime_usec = MIN(lifetime_usec, dnssl->lifetime_usec); | |
1082 | ||
64de00c4 YW |
1083 | SET_FOREACH(cp, link->ndisc_captive_portals) |
1084 | lifetime_usec = MIN(lifetime_usec, cp->lifetime_usec); | |
1085 | ||
77302468 YW |
1086 | if (lifetime_usec == USEC_INFINITY) |
1087 | return 0; | |
1088 | ||
1089 | r = event_reset_time(link->manager->event, &link->ndisc_expire, CLOCK_BOOTTIME, | |
1090 | lifetime_usec, 0, ndisc_expire_handler, link, 0, "ndisc-expiration", true); | |
1091 | if (r < 0) | |
1092 | return log_link_warning_errno(link, r, "Failed to update expiration timer for ndisc: %m"); | |
1093 | ||
1094 | return 0; | |
1095 | } | |
1096 | ||
928112a4 YW |
1097 | static int ndisc_start_dhcp6_client(Link *link, sd_ndisc_router *rt) { |
1098 | int r; | |
1099 | ||
1100 | assert(link); | |
1101 | assert(link->network); | |
1102 | ||
1103 | switch (link->network->ipv6_accept_ra_start_dhcp6_client) { | |
1104 | case IPV6_ACCEPT_RA_START_DHCP6_CLIENT_NO: | |
1105 | return 0; | |
1106 | ||
1107 | case IPV6_ACCEPT_RA_START_DHCP6_CLIENT_YES: { | |
1108 | uint64_t flags; | |
1109 | ||
1110 | r = sd_ndisc_router_get_flags(rt, &flags); | |
1111 | if (r < 0) | |
1112 | return log_link_warning_errno(link, r, "Failed to get RA flags: %m"); | |
1113 | ||
1114 | if ((flags & (ND_RA_FLAG_MANAGED | ND_RA_FLAG_OTHER)) == 0) | |
1115 | return 0; | |
1116 | ||
1117 | /* (re)start DHCPv6 client in stateful or stateless mode according to RA flags. | |
0bcc6557 AH |
1118 | * Note, if both "managed" and "other configuration" bits are set, then ignore |
1119 | * "other configuration" bit. See RFC 4861. */ | |
fac19a21 | 1120 | r = dhcp6_start_on_ra(link, !(flags & ND_RA_FLAG_MANAGED)); |
928112a4 YW |
1121 | break; |
1122 | } | |
1123 | case IPV6_ACCEPT_RA_START_DHCP6_CLIENT_ALWAYS: | |
0bcc6557 | 1124 | /* When IPv6AcceptRA.DHCPv6Client=always, start dhcp6 client in solicit mode |
928112a4 | 1125 | * even if the router flags have neither M nor O flags. */ |
fac19a21 | 1126 | r = dhcp6_start_on_ra(link, /* information_request = */ false); |
928112a4 YW |
1127 | break; |
1128 | ||
1129 | default: | |
1130 | assert_not_reached(); | |
1131 | } | |
1132 | ||
1133 | if (r < 0) | |
2c5bca17 | 1134 | return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease on NDisc request: %m"); |
928112a4 YW |
1135 | |
1136 | log_link_debug(link, "Acquiring DHCPv6 lease on NDisc request"); | |
1137 | return 0; | |
1138 | } | |
1139 | ||
d5017c84 | 1140 | static int ndisc_router_handler(Link *link, sd_ndisc_router *rt) { |
b8ce3b44 | 1141 | struct in6_addr router; |
94e6d37c | 1142 | usec_t timestamp_usec; |
86e2be7b | 1143 | int r; |
1e7a0e21 LP |
1144 | |
1145 | assert(link); | |
1146 | assert(link->network); | |
1147 | assert(link->manager); | |
1148 | assert(rt); | |
1149 | ||
b8ce3b44 | 1150 | r = sd_ndisc_router_get_address(rt, &router); |
5908d864 YW |
1151 | if (r == -ENODATA) { |
1152 | log_link_debug(link, "Received RA without router address, ignoring."); | |
1153 | return 0; | |
1154 | } | |
75d26411 | 1155 | if (r < 0) |
2c5bca17 | 1156 | return log_link_warning_errno(link, r, "Failed to get router address from RA: %m"); |
75d26411 | 1157 | |
c995fa02 | 1158 | if (in6_prefix_is_filtered(&router, 128, link->network->ndisc_allow_listed_router, link->network->ndisc_deny_listed_router)) { |
75d26411 | 1159 | if (DEBUG_LOGGING) { |
75d26411 | 1160 | if (!set_isempty(link->network->ndisc_allow_listed_router)) |
84dbb3fd | 1161 | log_link_debug(link, "Router %s is not in allow list, ignoring.", IN6_ADDR_TO_STRING(&router)); |
75d26411 | 1162 | else |
84dbb3fd | 1163 | log_link_debug(link, "Router %s is in deny list, ignoring.", IN6_ADDR_TO_STRING(&router)); |
75d26411 YW |
1164 | } |
1165 | return 0; | |
1166 | } | |
1167 | ||
94e6d37c | 1168 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); |
5908d864 YW |
1169 | if (r == -ENODATA) { |
1170 | log_link_debug(link, "Received RA without timestamp, ignoring."); | |
1171 | return 0; | |
1172 | } | |
94e6d37c YW |
1173 | if (r < 0) |
1174 | return r; | |
1175 | ||
1176 | r = ndisc_drop_outdated(link, timestamp_usec); | |
1177 | if (r < 0) | |
1178 | return r; | |
1179 | ||
928112a4 YW |
1180 | r = ndisc_start_dhcp6_client(link, rt); |
1181 | if (r < 0) | |
1182 | return r; | |
1e7a0e21 | 1183 | |
13e8a49a YW |
1184 | r = ndisc_router_process_default(link, rt); |
1185 | if (r < 0) | |
1186 | return r; | |
fbdda4bb | 1187 | |
13e8a49a YW |
1188 | r = ndisc_router_process_options(link, rt); |
1189 | if (r < 0) | |
1190 | return r; | |
d5017c84 | 1191 | |
77302468 YW |
1192 | r = ndisc_setup_expire(link); |
1193 | if (r < 0) | |
1194 | return r; | |
1195 | ||
2ccada8d | 1196 | if (link->ndisc_messages == 0) |
3b6a3bde | 1197 | link->ndisc_configured = true; |
2ccada8d | 1198 | else |
3b6a3bde | 1199 | log_link_debug(link, "Setting SLAAC addresses and router."); |
69203fba | 1200 | |
3b6a3bde | 1201 | if (!link->ndisc_configured) |
69203fba YW |
1202 | link_set_state(link, LINK_STATE_CONFIGURING); |
1203 | ||
76c5a0f2 | 1204 | link_check_ready(link); |
69203fba | 1205 | return 0; |
1e7a0e21 LP |
1206 | } |
1207 | ||
2324fd3a | 1208 | static void ndisc_handler(sd_ndisc *nd, sd_ndisc_event_t event, sd_ndisc_router *rt, void *userdata) { |
99534007 | 1209 | Link *link = ASSERT_PTR(userdata); |
13e8a49a | 1210 | int r; |
a13c50e7 | 1211 | |
9d96e6c3 TG |
1212 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
1213 | return; | |
a13c50e7 | 1214 | |
9d96e6c3 | 1215 | switch (event) { |
1e7a0e21 LP |
1216 | |
1217 | case SD_NDISC_EVENT_ROUTER: | |
13e8a49a | 1218 | r = ndisc_router_handler(link, rt); |
5908d864 | 1219 | if (r < 0 && r != -EBADMSG) { |
13e8a49a YW |
1220 | link_enter_failed(link); |
1221 | return; | |
1222 | } | |
1e7a0e21 LP |
1223 | break; |
1224 | ||
9d96e6c3 | 1225 | case SD_NDISC_EVENT_TIMEOUT: |
a8c10331 | 1226 | log_link_debug(link, "NDisc handler get timeout event"); |
3b6a3bde YW |
1227 | if (link->ndisc_messages == 0) { |
1228 | link->ndisc_configured = true; | |
3336e946 YW |
1229 | link_check_ready(link); |
1230 | } | |
9d96e6c3 TG |
1231 | break; |
1232 | default: | |
04499a70 | 1233 | assert_not_reached(); |
a13c50e7 TG |
1234 | } |
1235 | } | |
1236 | ||
ba4c7184 | 1237 | static int ndisc_configure(Link *link) { |
a13c50e7 TG |
1238 | int r; |
1239 | ||
1e7a0e21 LP |
1240 | assert(link); |
1241 | ||
2ffd6d73 YW |
1242 | if (!link_ipv6_accept_ra_enabled(link)) |
1243 | return 0; | |
a13c50e7 | 1244 | |
5c078687 | 1245 | if (link->ndisc) |
bc9e40c9 | 1246 | return -EBUSY; /* Already configured. */ |
2ffd6d73 | 1247 | |
5c078687 YW |
1248 | r = sd_ndisc_new(&link->ndisc); |
1249 | if (r < 0) | |
1250 | return r; | |
1251 | ||
1252 | r = sd_ndisc_attach_event(link->ndisc, link->manager->event, 0); | |
1253 | if (r < 0) | |
1254 | return r; | |
a13c50e7 | 1255 | |
3be64aa4 YW |
1256 | if (link->hw_addr.length == ETH_ALEN) { |
1257 | r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether); | |
1258 | if (r < 0) | |
1259 | return r; | |
1260 | } | |
a13c50e7 | 1261 | |
1e7a0e21 | 1262 | r = sd_ndisc_set_ifindex(link->ndisc, link->ifindex); |
a13c50e7 TG |
1263 | if (r < 0) |
1264 | return r; | |
1265 | ||
1e7a0e21 | 1266 | r = sd_ndisc_set_callback(link->ndisc, ndisc_handler, link); |
a13c50e7 TG |
1267 | if (r < 0) |
1268 | return r; | |
1269 | ||
1e7a0e21 LP |
1270 | return 0; |
1271 | } | |
1272 | ||
294f129b | 1273 | int ndisc_start(Link *link) { |
ba4c7184 YW |
1274 | int r; |
1275 | ||
294f129b YW |
1276 | assert(link); |
1277 | ||
1278 | if (!link->ndisc || !link->dhcp6_client) | |
1279 | return 0; | |
1280 | ||
ccffa166 YW |
1281 | if (!link_has_carrier(link)) |
1282 | return 0; | |
1283 | ||
3b6a3bde YW |
1284 | if (in6_addr_is_null(&link->ipv6ll_address)) |
1285 | return 0; | |
1286 | ||
294f129b YW |
1287 | log_link_debug(link, "Discovering IPv6 routers"); |
1288 | ||
ba4c7184 YW |
1289 | r = sd_ndisc_start(link->ndisc); |
1290 | if (r < 0) | |
1291 | return r; | |
1292 | ||
1293 | return 1; | |
1294 | } | |
1295 | ||
09d09207 | 1296 | static int ndisc_process_request(Request *req, Link *link, void *userdata) { |
ba4c7184 YW |
1297 | int r; |
1298 | ||
ff51134c | 1299 | assert(link); |
ba4c7184 | 1300 | |
4b482e8b | 1301 | if (!link_is_ready_to_configure(link, /* allow_unmanaged = */ false)) |
ba4c7184 YW |
1302 | return 0; |
1303 | ||
ba4c7184 YW |
1304 | r = ndisc_configure(link); |
1305 | if (r < 0) | |
1306 | return log_link_warning_errno(link, r, "Failed to configure IPv6 Router Discovery: %m"); | |
1307 | ||
1308 | r = ndisc_start(link); | |
1309 | if (r < 0) | |
1310 | return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m"); | |
1311 | ||
1312 | log_link_debug(link, "IPv6 Router Discovery is configured%s.", | |
1313 | r > 0 ? " and started" : ""); | |
ba4c7184 YW |
1314 | return 1; |
1315 | } | |
1316 | ||
1317 | int link_request_ndisc(Link *link) { | |
1318 | int r; | |
1319 | ||
1320 | assert(link); | |
1321 | ||
1322 | if (!link_ipv6_accept_ra_enabled(link)) | |
1323 | return 0; | |
1324 | ||
1325 | if (link->ndisc) | |
1326 | return 0; | |
1327 | ||
09d09207 | 1328 | r = link_queue_request(link, REQUEST_TYPE_NDISC, ndisc_process_request, NULL); |
ba4c7184 YW |
1329 | if (r < 0) |
1330 | return log_link_warning_errno(link, r, "Failed to request configuring of the IPv6 Router Discovery: %m"); | |
1331 | ||
1332 | log_link_debug(link, "Requested configuring of the IPv6 Router Discovery."); | |
1333 | return 0; | |
294f129b YW |
1334 | } |
1335 | ||
77302468 YW |
1336 | int ndisc_stop(Link *link) { |
1337 | assert(link); | |
1338 | ||
1339 | link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire); | |
1340 | ||
1341 | return sd_ndisc_stop(link->ndisc); | |
1342 | } | |
1343 | ||
1344 | ||
c69305ff LP |
1345 | void ndisc_flush(Link *link) { |
1346 | assert(link); | |
1347 | ||
64de00c4 | 1348 | /* Remove all RDNSS, DNSSL, and Captive Portal entries, without exception. */ |
c69305ff | 1349 | |
b0b97766 YW |
1350 | link->ndisc_rdnss = set_free(link->ndisc_rdnss); |
1351 | link->ndisc_dnssl = set_free(link->ndisc_dnssl); | |
64de00c4 | 1352 | link->ndisc_captive_portals = set_free(link->ndisc_captive_portals); |
c69305ff | 1353 | } |
e520ce64 | 1354 | |
ac24e418 SS |
1355 | static const char* const ipv6_accept_ra_start_dhcp6_client_table[_IPV6_ACCEPT_RA_START_DHCP6_CLIENT_MAX] = { |
1356 | [IPV6_ACCEPT_RA_START_DHCP6_CLIENT_NO] = "no", | |
1357 | [IPV6_ACCEPT_RA_START_DHCP6_CLIENT_ALWAYS] = "always", | |
1358 | [IPV6_ACCEPT_RA_START_DHCP6_CLIENT_YES] = "yes", | |
1359 | }; | |
1360 | ||
3b6a3bde YW |
1361 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING_WITH_BOOLEAN(ipv6_accept_ra_start_dhcp6_client, IPv6AcceptRAStartDHCP6Client, IPV6_ACCEPT_RA_START_DHCP6_CLIENT_YES); |
1362 | ||
1363 | DEFINE_CONFIG_PARSE_ENUM(config_parse_ipv6_accept_ra_use_domains, dhcp_use_domains, DHCPUseDomains, | |
1364 | "Failed to parse UseDomains= setting"); | |
1365 | DEFINE_CONFIG_PARSE_ENUM(config_parse_ipv6_accept_ra_start_dhcp6_client, ipv6_accept_ra_start_dhcp6_client, IPv6AcceptRAStartDHCP6Client, | |
1366 | "Failed to parse DHCPv6Client= setting"); |