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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" |
91750028 | 26 | #include "sysctl-util.h" |
1e7a0e21 LP |
27 | |
28 | #define NDISC_DNSSL_MAX 64U | |
29 | #define NDISC_RDNSS_MAX 64U | |
bf943a9d YW |
30 | /* Not defined RFC, but let's set an upper limit to make not consume much memory. |
31 | * This should be safe as typically there should be at most 1 portal per network. */ | |
32 | #define NDISC_CAPTIVE_PORTAL_MAX 64U | |
fe307276 | 33 | |
062c020f YW |
34 | bool link_ipv6_accept_ra_enabled(Link *link) { |
35 | assert(link); | |
36 | ||
37 | if (!socket_ipv6_is_supported()) | |
38 | return false; | |
39 | ||
40 | if (link->flags & IFF_LOOPBACK) | |
41 | return false; | |
42 | ||
f4ef1c19 YW |
43 | if (link->iftype == ARPHRD_CAN) |
44 | return false; | |
45 | ||
062c020f YW |
46 | if (!link->network) |
47 | return false; | |
48 | ||
bd7e0a3f | 49 | if (!link_may_have_ipv6ll(link, /* check_multicast = */ true)) |
062c020f YW |
50 | return false; |
51 | ||
3773eb54 YW |
52 | assert(link->network->ipv6_accept_ra >= 0); |
53 | return link->network->ipv6_accept_ra; | |
54 | } | |
55 | ||
56 | void network_adjust_ipv6_accept_ra(Network *network) { | |
57 | assert(network); | |
58 | ||
59 | if (!FLAGS_SET(network->link_local, ADDRESS_FAMILY_IPV6)) { | |
60 | if (network->ipv6_accept_ra > 0) | |
f81ac115 | 61 | log_warning("%s: IPv6AcceptRA= is enabled but IPv6 link-local addressing is disabled or not supported. " |
3773eb54 YW |
62 | "Disabling IPv6AcceptRA=.", network->filename); |
63 | network->ipv6_accept_ra = false; | |
64 | } | |
65 | ||
66 | if (network->ipv6_accept_ra < 0) | |
062c020f | 67 | /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */ |
3773eb54 | 68 | network->ipv6_accept_ra = !FLAGS_SET(network->ip_forward, ADDRESS_FAMILY_IPV6); |
de6b6ff8 | 69 | |
75d26411 YW |
70 | /* When RouterAllowList=, PrefixAllowList= or RouteAllowList= are specified, then |
71 | * RouterDenyList=, PrefixDenyList= or RouteDenyList= are ignored, respectively. */ | |
72 | if (!set_isempty(network->ndisc_allow_listed_router)) | |
73 | network->ndisc_deny_listed_router = set_free_free(network->ndisc_deny_listed_router); | |
de6b6ff8 SS |
74 | if (!set_isempty(network->ndisc_allow_listed_prefix)) |
75 | network->ndisc_deny_listed_prefix = set_free_free(network->ndisc_deny_listed_prefix); | |
76 | if (!set_isempty(network->ndisc_allow_listed_route_prefix)) | |
77 | network->ndisc_deny_listed_route_prefix = set_free_free(network->ndisc_deny_listed_route_prefix); | |
062c020f YW |
78 | } |
79 | ||
3b6a3bde | 80 | static int ndisc_check_ready(Link *link); |
50550722 | 81 | |
3b6a3bde YW |
82 | static int ndisc_address_ready_callback(Address *address) { |
83 | Address *a; | |
50550722 | 84 | |
3b6a3bde YW |
85 | assert(address); |
86 | assert(address->link); | |
50550722 | 87 | |
3b6a3bde YW |
88 | SET_FOREACH(a, address->link->addresses) |
89 | if (a->source == NETWORK_CONFIG_SOURCE_NDISC) | |
90 | a->callback = NULL; | |
50550722 | 91 | |
3b6a3bde YW |
92 | return ndisc_check_ready(address->link); |
93 | } | |
50550722 | 94 | |
3b6a3bde YW |
95 | static int ndisc_check_ready(Link *link) { |
96 | bool found = false, ready = false; | |
97 | Address *address; | |
50550722 | 98 | |
3b6a3bde | 99 | assert(link); |
50550722 | 100 | |
3b6a3bde YW |
101 | if (link->ndisc_messages > 0) { |
102 | log_link_debug(link, "%s(): SLAAC addresses and routes are not set.", __func__); | |
103 | return 0; | |
104 | } | |
50550722 | 105 | |
3b6a3bde YW |
106 | SET_FOREACH(address, link->addresses) { |
107 | if (address->source != NETWORK_CONFIG_SOURCE_NDISC) | |
108 | continue; | |
50550722 | 109 | |
3b6a3bde | 110 | found = true; |
50550722 | 111 | |
3b6a3bde YW |
112 | if (address_is_ready(address)) { |
113 | ready = true; | |
114 | break; | |
50550722 | 115 | } |
3b6a3bde | 116 | } |
50550722 | 117 | |
3b6a3bde YW |
118 | if (found && !ready) { |
119 | SET_FOREACH(address, link->addresses) | |
120 | if (address->source == NETWORK_CONFIG_SOURCE_NDISC) | |
121 | address->callback = ndisc_address_ready_callback; | |
50550722 | 122 | |
3b6a3bde YW |
123 | log_link_debug(link, "%s(): no SLAAC address is ready.", __func__); |
124 | return 0; | |
50550722 YW |
125 | } |
126 | ||
3b6a3bde YW |
127 | link->ndisc_configured = true; |
128 | log_link_debug(link, "SLAAC addresses and routes set."); | |
50550722 | 129 | |
3b6a3bde YW |
130 | link_check_ready(link); |
131 | return 0; | |
50550722 YW |
132 | } |
133 | ||
80d62d4f | 134 | static int ndisc_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, Route *route) { |
3b015d40 TG |
135 | int r; |
136 | ||
137 | assert(link); | |
3b015d40 | 138 | |
5a07fa9d YW |
139 | r = route_configure_handler_internal(rtnl, m, link, "Could not set NDisc route"); |
140 | if (r <= 0) | |
141 | return r; | |
3b015d40 | 142 | |
3b6a3bde | 143 | r = ndisc_check_ready(link); |
50550722 | 144 | if (r < 0) |
3b6a3bde | 145 | link_enter_failed(link); |
76c5a0f2 | 146 | |
3b6a3bde | 147 | return 1; |
76c5a0f2 YW |
148 | } |
149 | ||
6f812d28 YW |
150 | static void ndisc_set_route_priority(Link *link, Route *route) { |
151 | assert(link); | |
152 | assert(route); | |
153 | ||
154 | if (route->priority_set) | |
155 | return; /* explicitly configured. */ | |
156 | ||
157 | switch (route->pref) { | |
158 | case SD_NDISC_PREFERENCE_LOW: | |
159 | route->priority = link->network->ipv6_accept_ra_route_metric_low; | |
160 | break; | |
161 | case SD_NDISC_PREFERENCE_MEDIUM: | |
162 | route->priority = link->network->ipv6_accept_ra_route_metric_medium; | |
163 | break; | |
164 | case SD_NDISC_PREFERENCE_HIGH: | |
165 | route->priority = link->network->ipv6_accept_ra_route_metric_high; | |
166 | break; | |
167 | default: | |
168 | assert_not_reached(); | |
169 | } | |
170 | } | |
171 | ||
76c5a0f2 YW |
172 | static int ndisc_request_route(Route *in, Link *link, sd_ndisc_router *rt) { |
173 | _cleanup_(route_freep) Route *route = in; | |
3b6a3bde | 174 | struct in6_addr router; |
f141b2c0 | 175 | uint8_t hop_limit = 0; |
fc4a7f13 | 176 | uint32_t mtu = 0; |
d9a95033 | 177 | bool is_new; |
76c5a0f2 YW |
178 | int r; |
179 | ||
180 | assert(route); | |
181 | assert(link); | |
f95fb199 | 182 | assert(link->network); |
76c5a0f2 YW |
183 | assert(rt); |
184 | ||
3b6a3bde YW |
185 | r = sd_ndisc_router_get_address(rt, &router); |
186 | if (r < 0) | |
187 | return r; | |
188 | ||
fc4a7f13 SS |
189 | if (link->network->ipv6_accept_ra_use_mtu) { |
190 | r = sd_ndisc_router_get_mtu(rt, &mtu); | |
191 | if (r < 0 && r != -ENODATA) | |
192 | return log_link_warning_errno(link, r, "Failed to get default router MTU from RA: %m"); | |
193 | } | |
194 | ||
f141b2c0 SS |
195 | if (link->network->ipv6_accept_ra_use_hop_limit) { |
196 | r = sd_ndisc_router_get_hop_limit(rt, &hop_limit); | |
197 | if (r < 0 && r != -ENODATA) | |
198 | return log_link_warning_errno(link, r, "Failed to get default router hop limit from RA: %m"); | |
199 | } | |
200 | ||
3b6a3bde YW |
201 | route->source = NETWORK_CONFIG_SOURCE_NDISC; |
202 | route->provider.in6 = router; | |
429dc05a YW |
203 | if (!route->table_set) |
204 | route->table = link_get_ipv6_accept_ra_route_table(link); | |
6f812d28 | 205 | ndisc_set_route_priority(link, route); |
429dc05a YW |
206 | if (!route->protocol_set) |
207 | route->protocol = RTPROT_RA; | |
f95fb199 YW |
208 | if (route->quickack < 0) |
209 | route->quickack = link->network->ipv6_accept_ra_quickack; | |
fc4a7f13 SS |
210 | if (route->mtu == 0) |
211 | route->mtu = mtu; | |
429dc05a | 212 | |
f141b2c0 SS |
213 | if (route->hop_limit == 0) |
214 | route->hop_limit = hop_limit; | |
215 | ||
d9a95033 YW |
216 | is_new = route_get(NULL, link, route, NULL) < 0; |
217 | ||
218 | r = link_request_route(link, TAKE_PTR(route), true, &link->ndisc_messages, | |
219 | ndisc_route_handler, NULL); | |
220 | if (r < 0) | |
221 | return r; | |
222 | if (r > 0 && is_new) | |
3b6a3bde | 223 | link->ndisc_configured = false; |
50550722 | 224 | |
d9a95033 | 225 | return 0; |
50550722 YW |
226 | } |
227 | ||
80d62d4f | 228 | static int ndisc_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, Address *address) { |
73854ba1 YW |
229 | int r; |
230 | ||
231 | assert(link); | |
73854ba1 | 232 | |
5a07fa9d YW |
233 | r = address_configure_handler_internal(rtnl, m, link, "Could not set NDisc address"); |
234 | if (r <= 0) | |
235 | return r; | |
73854ba1 | 236 | |
3b6a3bde | 237 | r = ndisc_check_ready(link); |
50550722 | 238 | if (r < 0) |
3b6a3bde | 239 | link_enter_failed(link); |
69203fba | 240 | |
3b6a3bde | 241 | return 1; |
69203fba YW |
242 | } |
243 | ||
76c5a0f2 YW |
244 | static int ndisc_request_address(Address *in, Link *link, sd_ndisc_router *rt) { |
245 | _cleanup_(address_freep) Address *address = in; | |
3b6a3bde | 246 | struct in6_addr router; |
d9a95033 | 247 | bool is_new; |
76c5a0f2 YW |
248 | int r; |
249 | ||
250 | assert(address); | |
251 | assert(link); | |
252 | assert(rt); | |
253 | ||
3b6a3bde YW |
254 | r = sd_ndisc_router_get_address(rt, &router); |
255 | if (r < 0) | |
76c5a0f2 YW |
256 | return r; |
257 | ||
3b6a3bde YW |
258 | address->source = NETWORK_CONFIG_SOURCE_NDISC; |
259 | address->provider.in6 = router; | |
76c5a0f2 | 260 | |
4b3590c3 TM |
261 | r = free_and_strdup_warn(&address->netlabel, link->network->ndisc_netlabel); |
262 | if (r < 0) | |
263 | return r; | |
264 | ||
d9a95033 YW |
265 | is_new = address_get(link, address, NULL) < 0; |
266 | ||
f60e6558 | 267 | r = link_request_address(link, address, &link->ndisc_messages, |
d9a95033 YW |
268 | ndisc_address_handler, NULL); |
269 | if (r < 0) | |
270 | return r; | |
271 | if (r > 0 && is_new) | |
3b6a3bde | 272 | link->ndisc_configured = false; |
3b6a3bde | 273 | |
d9a95033 | 274 | return 0; |
76c5a0f2 YW |
275 | } |
276 | ||
d5017c84 | 277 | static int ndisc_router_process_default(Link *link, sd_ndisc_router *rt) { |
91fc5135 | 278 | usec_t lifetime_usec, timestamp_usec; |
91750028 | 279 | uint32_t icmp6_ratelimit = 0; |
b8ce3b44 | 280 | struct in6_addr gateway; |
91fc5135 | 281 | uint16_t lifetime_sec; |
1e7a0e21 | 282 | unsigned preference; |
13e8a49a | 283 | int r; |
3b015d40 | 284 | |
3b015d40 | 285 | assert(link); |
610c0db1 | 286 | assert(link->network); |
1e7a0e21 | 287 | assert(rt); |
3b015d40 | 288 | |
610c0db1 YW |
289 | if (!link->network->ipv6_accept_ra_use_gateway && |
290 | hashmap_isempty(link->network->routes_by_section)) | |
291 | return 0; | |
292 | ||
91fc5135 | 293 | r = sd_ndisc_router_get_lifetime(rt, &lifetime_sec); |
d5017c84 | 294 | if (r < 0) |
2c5bca17 | 295 | return log_link_warning_errno(link, r, "Failed to get gateway lifetime from RA: %m"); |
d5017c84 | 296 | |
ba4e0427 | 297 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); |
91fc5135 | 298 | if (r < 0) |
2c5bca17 | 299 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
91fc5135 | 300 | |
5235d739 | 301 | lifetime_usec = sec16_to_usec(lifetime_sec, timestamp_usec); |
91fc5135 | 302 | |
b8ce3b44 | 303 | r = sd_ndisc_router_get_address(rt, &gateway); |
d5017c84 | 304 | if (r < 0) |
2c5bca17 | 305 | return log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m"); |
1e7a0e21 | 306 | |
5d003031 | 307 | if (link_get_ipv6_address(link, &gateway, 0, NULL) >= 0) { |
84dbb3fd | 308 | if (DEBUG_LOGGING) |
5eec0a08 | 309 | log_link_debug(link, "No NDisc route added, gateway %s matches local address", |
84dbb3fd | 310 | IN6_ADDR_TO_STRING(&gateway)); |
5eec0a08 | 311 | return 0; |
ce2ea782 | 312 | } |
6d7c7615 | 313 | |
1e7a0e21 | 314 | r = sd_ndisc_router_get_preference(rt, &preference); |
d5017c84 | 315 | if (r < 0) |
2c5bca17 | 316 | return log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m"); |
1e7a0e21 | 317 | |
610c0db1 YW |
318 | if (link->network->ipv6_accept_ra_use_gateway) { |
319 | _cleanup_(route_freep) Route *route = NULL; | |
1e7a0e21 | 320 | |
610c0db1 YW |
321 | r = route_new(&route); |
322 | if (r < 0) | |
323 | return log_oom(); | |
1e7a0e21 | 324 | |
610c0db1 YW |
325 | route->family = AF_INET6; |
326 | route->pref = preference; | |
327 | route->gw_family = AF_INET6; | |
328 | route->gw.in6 = gateway; | |
329 | route->lifetime_usec = lifetime_usec; | |
610c0db1 YW |
330 | |
331 | r = ndisc_request_route(TAKE_PTR(route), link, rt); | |
332 | if (r < 0) | |
2c5bca17 | 333 | return log_link_warning_errno(link, r, "Could not request default route: %m"); |
610c0db1 | 334 | } |
d5017c84 | 335 | |
1985c54f | 336 | Route *route_gw; |
2a54a044 | 337 | HASHMAP_FOREACH(route_gw, link->network->routes_by_section) { |
610c0db1 YW |
338 | _cleanup_(route_freep) Route *route = NULL; |
339 | ||
1a3a6309 | 340 | if (!route_gw->gateway_from_dhcp_or_ra) |
1985c54f YW |
341 | continue; |
342 | ||
5bb80a46 | 343 | if (route_gw->gw_family != AF_INET6) |
1985c54f YW |
344 | continue; |
345 | ||
76c5a0f2 YW |
346 | r = route_dup(route_gw, &route); |
347 | if (r < 0) | |
348 | return r; | |
349 | ||
350 | route->gw.in6 = gateway; | |
76c5a0f2 YW |
351 | if (!route->pref_set) |
352 | route->pref = preference; | |
91fc5135 | 353 | route->lifetime_usec = lifetime_usec; |
76c5a0f2 YW |
354 | |
355 | r = ndisc_request_route(TAKE_PTR(route), link, rt); | |
13e8a49a | 356 | if (r < 0) |
2c5bca17 | 357 | return log_link_warning_errno(link, r, "Could not request gateway: %m"); |
1985c54f YW |
358 | } |
359 | ||
91750028 SS |
360 | r = sd_ndisc_router_get_icmp6_ratelimit(rt, &icmp6_ratelimit); |
361 | if (r < 0) | |
362 | log_link_debug(link, "Failed to get default router preference from RA: %m"); | |
363 | ||
364 | if (icmp6_ratelimit > 0 && link->network->ipv6_accept_ra_use_icmp6_ratelimit) { | |
365 | char buf[DECIMAL_STR_MAX(unsigned)]; | |
366 | ||
367 | xsprintf(buf, "%u", icmp6_ratelimit); | |
368 | ||
369 | r = sysctl_write("net/ipv6/icmp/ratelimit", buf); | |
370 | if (r < 0) | |
371 | log_link_warning_errno(link, r, "Could not configure icmp6 rate limit: %m"); | |
372 | } | |
373 | ||
d5017c84 | 374 | return 0; |
1e7a0e21 LP |
375 | } |
376 | ||
d5017c84 | 377 | static int ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *rt) { |
16bc8635 YW |
378 | uint32_t lifetime_valid_sec, lifetime_preferred_sec; |
379 | usec_t lifetime_valid_usec, lifetime_preferred_usec, timestamp_usec; | |
d207581f | 380 | _cleanup_set_free_ Set *addresses = NULL; |
151b8ea3 | 381 | struct in6_addr prefix, *a; |
1e7a0e21 LP |
382 | unsigned prefixlen; |
383 | int r; | |
384 | ||
385 | assert(link); | |
fbdda4bb | 386 | assert(link->network); |
1e7a0e21 LP |
387 | assert(rt); |
388 | ||
fbdda4bb YW |
389 | if (!link->network->ipv6_accept_ra_use_autonomous_prefix) |
390 | return 0; | |
391 | ||
ba4e0427 | 392 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); |
d5017c84 | 393 | if (r < 0) |
2c5bca17 | 394 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
6554550f | 395 | |
151b8ea3 YW |
396 | r = sd_ndisc_router_prefix_get_address(rt, &prefix); |
397 | if (r < 0) | |
2c5bca17 | 398 | return log_link_warning_errno(link, r, "Failed to get prefix address: %m"); |
151b8ea3 | 399 | |
1e7a0e21 | 400 | r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen); |
d5017c84 | 401 | if (r < 0) |
2c5bca17 | 402 | return log_link_warning_errno(link, r, "Failed to get prefix length: %m"); |
1e7a0e21 | 403 | |
868bd1aa | 404 | /* ndisc_generate_addresses() below requires the prefix length <= 64. */ |
151b8ea3 | 405 | if (prefixlen > 64) { |
c71384a9 ZJS |
406 | log_link_debug(link, "Prefix is longer than 64, ignoring autonomous prefix %s.", |
407 | IN6_ADDR_PREFIX_TO_STRING(&prefix, prefixlen)); | |
151b8ea3 YW |
408 | return 0; |
409 | } | |
410 | ||
16bc8635 | 411 | r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_valid_sec); |
d5017c84 | 412 | if (r < 0) |
2c5bca17 | 413 | return log_link_warning_errno(link, r, "Failed to get prefix valid lifetime: %m"); |
1e7a0e21 | 414 | |
16bc8635 | 415 | r = sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime_preferred_sec); |
d5017c84 | 416 | if (r < 0) |
2c5bca17 | 417 | return log_link_warning_errno(link, r, "Failed to get prefix preferred lifetime: %m"); |
3b015d40 | 418 | |
92bdc3ff | 419 | /* The preferred lifetime is never greater than the valid lifetime */ |
16bc8635 | 420 | if (lifetime_preferred_sec > lifetime_valid_sec) |
d5017c84 | 421 | return 0; |
92bdc3ff | 422 | |
5235d739 YW |
423 | lifetime_valid_usec = sec_to_usec(lifetime_valid_sec, timestamp_usec); |
424 | lifetime_preferred_usec = sec_to_usec(lifetime_preferred_sec, timestamp_usec); | |
16bc8635 | 425 | |
868bd1aa | 426 | r = ndisc_generate_addresses(link, &prefix, prefixlen, &addresses); |
5f506a55 | 427 | if (r < 0) |
2c5bca17 | 428 | return log_link_warning_errno(link, r, "Failed to generate SLAAC addresses: %m"); |
c24c83dc | 429 | |
90e74a66 | 430 | SET_FOREACH(a, addresses) { |
76c5a0f2 | 431 | _cleanup_(address_freep) Address *address = NULL; |
13e8a49a | 432 | |
76c5a0f2 YW |
433 | r = address_new(&address); |
434 | if (r < 0) | |
435 | return log_oom(); | |
436 | ||
437 | address->family = AF_INET6; | |
25db3aea | 438 | address->in_addr.in6 = *a; |
76c5a0f2 YW |
439 | address->prefixlen = prefixlen; |
440 | address->flags = IFA_F_NOPREFIXROUTE|IFA_F_MANAGETEMPADDR; | |
16bc8635 YW |
441 | address->lifetime_valid_usec = lifetime_valid_usec; |
442 | address->lifetime_preferred_usec = lifetime_preferred_usec; | |
fe841414 | 443 | |
76c5a0f2 | 444 | r = ndisc_request_address(TAKE_PTR(address), link, rt); |
13e8a49a | 445 | if (r < 0) |
2c5bca17 | 446 | return log_link_warning_errno(link, r, "Could not request SLAAC address: %m"); |
3b015d40 | 447 | } |
d5017c84 YW |
448 | |
449 | return 0; | |
3b015d40 TG |
450 | } |
451 | ||
d5017c84 | 452 | static int ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt) { |
8e766630 | 453 | _cleanup_(route_freep) Route *route = NULL; |
f44eebd1 | 454 | unsigned prefixlen, preference; |
91fc5135 YW |
455 | usec_t timestamp_usec; |
456 | uint32_t lifetime_sec; | |
167c7ae5 | 457 | struct in6_addr prefix; |
3b015d40 TG |
458 | int r; |
459 | ||
3b015d40 | 460 | assert(link); |
fbdda4bb | 461 | assert(link->network); |
1e7a0e21 | 462 | assert(rt); |
3b015d40 | 463 | |
fbdda4bb YW |
464 | if (!link->network->ipv6_accept_ra_use_onlink_prefix) |
465 | return 0; | |
466 | ||
09845af5 YW |
467 | r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_sec); |
468 | if (r < 0) | |
2c5bca17 | 469 | return log_link_warning_errno(link, r, "Failed to get prefix lifetime: %m"); |
09845af5 | 470 | |
ba4e0427 | 471 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); |
d5017c84 | 472 | if (r < 0) |
2c5bca17 | 473 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
1e7a0e21 | 474 | |
167c7ae5 YW |
475 | r = sd_ndisc_router_prefix_get_address(rt, &prefix); |
476 | if (r < 0) | |
2c5bca17 | 477 | return log_link_warning_errno(link, r, "Failed to get prefix address: %m"); |
167c7ae5 | 478 | |
1e7a0e21 | 479 | r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen); |
d5017c84 | 480 | if (r < 0) |
2c5bca17 | 481 | return log_link_warning_errno(link, r, "Failed to get prefix length: %m"); |
1e7a0e21 | 482 | |
f44eebd1 SS |
483 | /* Prefix Information option does not have preference, hence we use the 'main' preference here */ |
484 | r = sd_ndisc_router_get_preference(rt, &preference); | |
485 | if (r < 0) | |
486 | log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m"); | |
487 | ||
3b015d40 | 488 | r = route_new(&route); |
d5017c84 | 489 | if (r < 0) |
13e8a49a | 490 | return log_oom(); |
3b015d40 | 491 | |
3b015d40 | 492 | route->family = AF_INET6; |
167c7ae5 | 493 | route->dst.in6 = prefix; |
3b015d40 | 494 | route->dst_prefixlen = prefixlen; |
f44eebd1 | 495 | route->pref = preference; |
5235d739 | 496 | route->lifetime_usec = sec_to_usec(lifetime_sec, timestamp_usec); |
3b015d40 | 497 | |
76c5a0f2 | 498 | r = ndisc_request_route(TAKE_PTR(route), link, rt); |
13e8a49a | 499 | if (r < 0) |
2c5bca17 | 500 | return log_link_warning_errno(link, r, "Could not request prefix route: %m"); |
d5017c84 YW |
501 | |
502 | return 0; | |
3b015d40 TG |
503 | } |
504 | ||
fbdda4bb YW |
505 | static int ndisc_router_process_prefix(Link *link, sd_ndisc_router *rt) { |
506 | unsigned prefixlen; | |
507 | struct in6_addr a; | |
508 | uint8_t flags; | |
509 | int r; | |
510 | ||
511 | assert(link); | |
512 | assert(link->network); | |
513 | assert(rt); | |
514 | ||
515 | r = sd_ndisc_router_prefix_get_address(rt, &a); | |
516 | if (r < 0) | |
2c5bca17 | 517 | return log_link_warning_errno(link, r, "Failed to get prefix address: %m"); |
fbdda4bb | 518 | |
a115c60e YW |
519 | /* RFC 4861 Section 4.6.2: |
520 | * A router SHOULD NOT send a prefix option for the link-local prefix and a host SHOULD ignore such | |
521 | * a prefix option. */ | |
522 | if (in6_addr_is_link_local(&a)) { | |
523 | log_link_debug(link, "Received link-local prefix, ignoring autonomous prefix."); | |
524 | return 0; | |
525 | } | |
526 | ||
fbdda4bb YW |
527 | r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen); |
528 | if (r < 0) | |
2c5bca17 | 529 | return log_link_warning_errno(link, r, "Failed to get prefix length: %m"); |
fbdda4bb YW |
530 | |
531 | if (in6_prefix_is_filtered(&a, prefixlen, link->network->ndisc_allow_listed_prefix, link->network->ndisc_deny_listed_prefix)) { | |
c71384a9 ZJS |
532 | if (DEBUG_LOGGING) |
533 | log_link_debug(link, "Prefix '%s' is %s, ignoring", | |
534 | !set_isempty(link->network->ndisc_allow_listed_prefix) ? "not in allow list" | |
535 | : "in deny list", | |
536 | IN6_ADDR_PREFIX_TO_STRING(&a, prefixlen)); | |
fbdda4bb YW |
537 | return 0; |
538 | } | |
539 | ||
540 | r = sd_ndisc_router_prefix_get_flags(rt, &flags); | |
541 | if (r < 0) | |
2c5bca17 | 542 | return log_link_warning_errno(link, r, "Failed to get RA prefix flags: %m"); |
fbdda4bb YW |
543 | |
544 | if (FLAGS_SET(flags, ND_OPT_PI_FLAG_ONLINK)) { | |
545 | r = ndisc_router_process_onlink_prefix(link, rt); | |
546 | if (r < 0) | |
547 | return r; | |
548 | } | |
549 | ||
550 | if (FLAGS_SET(flags, ND_OPT_PI_FLAG_AUTO)) { | |
551 | r = ndisc_router_process_autonomous_prefix(link, rt); | |
552 | if (r < 0) | |
553 | return r; | |
554 | } | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
d5017c84 | 559 | static int ndisc_router_process_route(Link *link, sd_ndisc_router *rt) { |
8e766630 | 560 | _cleanup_(route_freep) Route *route = NULL; |
1e7a0e21 | 561 | unsigned preference, prefixlen; |
91fc5135 YW |
562 | struct in6_addr gateway, dst; |
563 | uint32_t lifetime_sec; | |
564 | usec_t timestamp_usec; | |
7a695d8e | 565 | int r; |
a13c50e7 TG |
566 | |
567 | assert(link); | |
a13c50e7 | 568 | |
610c0db1 YW |
569 | if (!link->network->ipv6_accept_ra_use_route_prefix) |
570 | return 0; | |
571 | ||
91fc5135 | 572 | r = sd_ndisc_router_route_get_lifetime(rt, &lifetime_sec); |
d5017c84 | 573 | if (r < 0) |
2c5bca17 | 574 | return log_link_warning_errno(link, r, "Failed to get route lifetime from RA: %m"); |
d5017c84 | 575 | |
b8ce3b44 | 576 | r = sd_ndisc_router_route_get_address(rt, &dst); |
d5017c84 | 577 | if (r < 0) |
2c5bca17 | 578 | return log_link_warning_errno(link, r, "Failed to get route destination address: %m"); |
3b015d40 | 579 | |
c995fa02 YW |
580 | r = sd_ndisc_router_route_get_prefixlen(rt, &prefixlen); |
581 | if (r < 0) | |
2c5bca17 | 582 | return log_link_warning_errno(link, r, "Failed to get route prefix length: %m"); |
c995fa02 | 583 | |
80bfc3b9 YW |
584 | if (in6_addr_is_null(&dst) && prefixlen == 0) { |
585 | log_link_debug(link, "Route prefix is ::/0, ignoring"); | |
586 | return 0; | |
587 | } | |
588 | ||
c71384a9 ZJS |
589 | if (in6_prefix_is_filtered(&dst, prefixlen, |
590 | link->network->ndisc_allow_listed_route_prefix, | |
591 | link->network->ndisc_deny_listed_route_prefix)) { | |
16c89e64 | 592 | |
c71384a9 ZJS |
593 | if (DEBUG_LOGGING) |
594 | log_link_debug(link, "Route prefix %s is %s, ignoring", | |
595 | !set_isempty(link->network->ndisc_allow_listed_route_prefix) ? "not in allow list" | |
596 | : "in deny list", | |
597 | IN6_ADDR_PREFIX_TO_STRING(&dst, prefixlen)); | |
16c89e64 DP |
598 | return 0; |
599 | } | |
600 | ||
b8ce3b44 | 601 | r = sd_ndisc_router_get_address(rt, &gateway); |
19e334bd | 602 | if (r < 0) |
2c5bca17 | 603 | return log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m"); |
19e334bd | 604 | |
5d003031 | 605 | if (link_get_ipv6_address(link, &gateway, 0, NULL) >= 0) { |
84dbb3fd ZJS |
606 | if (DEBUG_LOGGING) |
607 | log_link_debug(link, "Advertised route gateway %s is local to the link, ignoring route", | |
608 | IN6_ADDR_TO_STRING(&gateway)); | |
22101916 DP |
609 | return 0; |
610 | } | |
611 | ||
1e7a0e21 | 612 | r = sd_ndisc_router_route_get_preference(rt, &preference); |
3912d49d SS |
613 | if (r == -ENOTSUP) { |
614 | log_link_debug_errno(link, r, "Received route prefix with unsupported preference, ignoring: %m"); | |
615 | return 0; | |
616 | } | |
d5017c84 | 617 | if (r < 0) |
2c5bca17 | 618 | return log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m"); |
1e7a0e21 | 619 | |
ba4e0427 | 620 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); |
d5017c84 | 621 | if (r < 0) |
2c5bca17 | 622 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
3b015d40 TG |
623 | |
624 | r = route_new(&route); | |
d5017c84 | 625 | if (r < 0) |
13e8a49a | 626 | return log_oom(); |
3b015d40 | 627 | |
3b015d40 | 628 | route->family = AF_INET6; |
1e7a0e21 | 629 | route->pref = preference; |
b8ce3b44 | 630 | route->gw.in6 = gateway; |
6dd53981 | 631 | route->gw_family = AF_INET6; |
b8ce3b44 | 632 | route->dst.in6 = dst; |
1e7a0e21 | 633 | route->dst_prefixlen = prefixlen; |
5235d739 | 634 | route->lifetime_usec = sec_to_usec(lifetime_sec, timestamp_usec); |
3b015d40 | 635 | |
76c5a0f2 | 636 | r = ndisc_request_route(TAKE_PTR(route), link, rt); |
13e8a49a | 637 | if (r < 0) |
2c5bca17 | 638 | return log_link_warning_errno(link, r, "Could not request additional route: %m"); |
d5017c84 YW |
639 | |
640 | return 0; | |
9d96e6c3 | 641 | } |
a13c50e7 | 642 | |
7a08d314 | 643 | static void ndisc_rdnss_hash_func(const NDiscRDNSS *x, struct siphash *state) { |
1e7a0e21 LP |
644 | siphash24_compress(&x->address, sizeof(x->address), state); |
645 | } | |
646 | ||
7a08d314 | 647 | static int ndisc_rdnss_compare_func(const NDiscRDNSS *a, const NDiscRDNSS *b) { |
1e7a0e21 LP |
648 | return memcmp(&a->address, &b->address, sizeof(a->address)); |
649 | } | |
650 | ||
b0b97766 YW |
651 | DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR( |
652 | ndisc_rdnss_hash_ops, | |
653 | NDiscRDNSS, | |
654 | ndisc_rdnss_hash_func, | |
655 | ndisc_rdnss_compare_func, | |
656 | free); | |
1e7a0e21 | 657 | |
d5017c84 | 658 | static int ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) { |
03ccc4b4 YW |
659 | usec_t lifetime_usec, timestamp_usec; |
660 | uint32_t lifetime_sec; | |
1e7a0e21 | 661 | const struct in6_addr *a; |
50550722 | 662 | struct in6_addr router; |
8aba7b83 | 663 | bool updated = false, logged_about_too_many = false; |
13e8a49a | 664 | int n, r; |
1e7a0e21 LP |
665 | |
666 | assert(link); | |
ad0b2df6 | 667 | assert(link->network); |
1e7a0e21 LP |
668 | assert(rt); |
669 | ||
ad0b2df6 YW |
670 | if (!link->network->ipv6_accept_ra_use_dns) |
671 | return 0; | |
672 | ||
50550722 YW |
673 | r = sd_ndisc_router_get_address(rt, &router); |
674 | if (r < 0) | |
2c5bca17 | 675 | return log_link_warning_errno(link, r, "Failed to get router address from RA: %m"); |
50550722 | 676 | |
ba4e0427 | 677 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); |
d5017c84 | 678 | if (r < 0) |
2c5bca17 | 679 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
1e7a0e21 | 680 | |
03ccc4b4 | 681 | r = sd_ndisc_router_rdnss_get_lifetime(rt, &lifetime_sec); |
d5017c84 | 682 | if (r < 0) |
2c5bca17 | 683 | return log_link_warning_errno(link, r, "Failed to get RDNSS lifetime: %m"); |
1e7a0e21 | 684 | |
5235d739 | 685 | lifetime_usec = sec_to_usec(lifetime_sec, timestamp_usec); |
03ccc4b4 | 686 | |
1e7a0e21 | 687 | n = sd_ndisc_router_rdnss_get_addresses(rt, &a); |
d5017c84 | 688 | if (n < 0) |
2c5bca17 | 689 | return log_link_warning_errno(link, n, "Failed to get RDNSS addresses: %m"); |
1e7a0e21 | 690 | |
b0b97766 YW |
691 | for (int j = 0; j < n; j++) { |
692 | _cleanup_free_ NDiscRDNSS *x = NULL; | |
3b6a3bde | 693 | NDiscRDNSS *rdnss, d = { |
b0b97766 YW |
694 | .address = a[j], |
695 | }; | |
1e7a0e21 | 696 | |
af2aea8b YW |
697 | if (lifetime_usec == 0) { |
698 | /* The entry is outdated. */ | |
699 | free(set_remove(link->ndisc_rdnss, &d)); | |
700 | updated = true; | |
701 | continue; | |
702 | } | |
703 | ||
b0b97766 YW |
704 | rdnss = set_get(link->ndisc_rdnss, &d); |
705 | if (rdnss) { | |
50550722 | 706 | rdnss->router = router; |
03ccc4b4 | 707 | rdnss->lifetime_usec = lifetime_usec; |
1e7a0e21 LP |
708 | continue; |
709 | } | |
710 | ||
8aba7b83 YW |
711 | if (set_size(link->ndisc_rdnss) >= NDISC_RDNSS_MAX) { |
712 | if (!logged_about_too_many) | |
713 | log_link_warning(link, "Too many RDNSS records per link. Only first %u records will be used.", NDISC_RDNSS_MAX); | |
714 | logged_about_too_many = true; | |
715 | continue; | |
716 | } | |
717 | ||
d5017c84 YW |
718 | x = new(NDiscRDNSS, 1); |
719 | if (!x) | |
720 | return log_oom(); | |
1e7a0e21 | 721 | |
d5017c84 | 722 | *x = (NDiscRDNSS) { |
b0b97766 | 723 | .address = a[j], |
50550722 | 724 | .router = router, |
03ccc4b4 | 725 | .lifetime_usec = lifetime_usec, |
d5017c84 | 726 | }; |
1e7a0e21 | 727 | |
35e601d4 | 728 | r = set_ensure_consume(&link->ndisc_rdnss, &ndisc_rdnss_hash_ops, TAKE_PTR(x)); |
d5017c84 YW |
729 | if (r < 0) |
730 | return log_oom(); | |
1e7a0e21 | 731 | assert(r > 0); |
9092113d YW |
732 | |
733 | updated = true; | |
1e7a0e21 | 734 | } |
d5017c84 | 735 | |
9092113d YW |
736 | if (updated) |
737 | link_dirty(link); | |
738 | ||
d5017c84 | 739 | return 0; |
1e7a0e21 LP |
740 | } |
741 | ||
7a08d314 | 742 | static void ndisc_dnssl_hash_func(const NDiscDNSSL *x, struct siphash *state) { |
f281fc1e | 743 | siphash24_compress_string(NDISC_DNSSL_DOMAIN(x), state); |
1e7a0e21 LP |
744 | } |
745 | ||
7a08d314 | 746 | static int ndisc_dnssl_compare_func(const NDiscDNSSL *a, const NDiscDNSSL *b) { |
1e7a0e21 LP |
747 | return strcmp(NDISC_DNSSL_DOMAIN(a), NDISC_DNSSL_DOMAIN(b)); |
748 | } | |
749 | ||
b0b97766 YW |
750 | DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR( |
751 | ndisc_dnssl_hash_ops, | |
752 | NDiscDNSSL, | |
753 | ndisc_dnssl_hash_func, | |
754 | ndisc_dnssl_compare_func, | |
755 | free); | |
1e7a0e21 | 756 | |
13e8a49a | 757 | static int ndisc_router_process_dnssl(Link *link, sd_ndisc_router *rt) { |
1e7a0e21 | 758 | _cleanup_strv_free_ char **l = NULL; |
03ccc4b4 | 759 | usec_t lifetime_usec, timestamp_usec; |
50550722 | 760 | struct in6_addr router; |
03ccc4b4 | 761 | uint32_t lifetime_sec; |
8aba7b83 | 762 | bool updated = false, logged_about_too_many = false; |
1e7a0e21 LP |
763 | int r; |
764 | ||
765 | assert(link); | |
ad0b2df6 | 766 | assert(link->network); |
1e7a0e21 LP |
767 | assert(rt); |
768 | ||
ad0b2df6 YW |
769 | if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_NO) |
770 | return 0; | |
771 | ||
50550722 YW |
772 | r = sd_ndisc_router_get_address(rt, &router); |
773 | if (r < 0) | |
2c5bca17 | 774 | return log_link_warning_errno(link, r, "Failed to get router address from RA: %m"); |
50550722 | 775 | |
ba4e0427 | 776 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); |
13e8a49a | 777 | if (r < 0) |
2c5bca17 | 778 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
1e7a0e21 | 779 | |
03ccc4b4 | 780 | r = sd_ndisc_router_dnssl_get_lifetime(rt, &lifetime_sec); |
13e8a49a | 781 | if (r < 0) |
2c5bca17 | 782 | return log_link_warning_errno(link, r, "Failed to get DNSSL lifetime: %m"); |
1e7a0e21 | 783 | |
5235d739 | 784 | lifetime_usec = sec_to_usec(lifetime_sec, timestamp_usec); |
03ccc4b4 | 785 | |
1e7a0e21 | 786 | r = sd_ndisc_router_dnssl_get_domains(rt, &l); |
13e8a49a | 787 | if (r < 0) |
2c5bca17 | 788 | return log_link_warning_errno(link, r, "Failed to get DNSSL addresses: %m"); |
1e7a0e21 | 789 | |
b0b97766 YW |
790 | STRV_FOREACH(j, l) { |
791 | _cleanup_free_ NDiscDNSSL *s = NULL; | |
3b6a3bde | 792 | NDiscDNSSL *dnssl; |
1e7a0e21 | 793 | |
b0b97766 YW |
794 | s = malloc0(ALIGN(sizeof(NDiscDNSSL)) + strlen(*j) + 1); |
795 | if (!s) | |
796 | return log_oom(); | |
1e7a0e21 | 797 | |
b0b97766 | 798 | strcpy(NDISC_DNSSL_DOMAIN(s), *j); |
1e7a0e21 | 799 | |
af2aea8b YW |
800 | if (lifetime_usec == 0) { |
801 | /* The entry is outdated. */ | |
802 | free(set_remove(link->ndisc_dnssl, s)); | |
803 | updated = true; | |
804 | continue; | |
805 | } | |
806 | ||
b0b97766 YW |
807 | dnssl = set_get(link->ndisc_dnssl, s); |
808 | if (dnssl) { | |
50550722 | 809 | dnssl->router = router; |
03ccc4b4 | 810 | dnssl->lifetime_usec = lifetime_usec; |
1e7a0e21 LP |
811 | continue; |
812 | } | |
813 | ||
8aba7b83 YW |
814 | if (set_size(link->ndisc_dnssl) >= NDISC_DNSSL_MAX) { |
815 | if (!logged_about_too_many) | |
816 | log_link_warning(link, "Too many DNSSL records per link. Only first %u records will be used.", NDISC_DNSSL_MAX); | |
817 | logged_about_too_many = true; | |
818 | continue; | |
819 | } | |
820 | ||
50550722 | 821 | s->router = router; |
03ccc4b4 | 822 | s->lifetime_usec = lifetime_usec; |
1e7a0e21 | 823 | |
35e601d4 | 824 | r = set_ensure_consume(&link->ndisc_dnssl, &ndisc_dnssl_hash_ops, TAKE_PTR(s)); |
13e8a49a YW |
825 | if (r < 0) |
826 | return log_oom(); | |
1e7a0e21 | 827 | assert(r > 0); |
9092113d YW |
828 | |
829 | updated = true; | |
1e7a0e21 | 830 | } |
13e8a49a | 831 | |
9092113d YW |
832 | if (updated) |
833 | link_dirty(link); | |
834 | ||
13e8a49a | 835 | return 0; |
1e7a0e21 LP |
836 | } |
837 | ||
64de00c4 YW |
838 | static NDiscCaptivePortal* ndisc_captive_portal_free(NDiscCaptivePortal *x) { |
839 | if (!x) | |
840 | return NULL; | |
841 | ||
842 | free(x->captive_portal); | |
843 | return mfree(x); | |
844 | } | |
845 | ||
846 | DEFINE_TRIVIAL_CLEANUP_FUNC(NDiscCaptivePortal*, ndisc_captive_portal_free); | |
847 | ||
848 | static void ndisc_captive_portal_hash_func(const NDiscCaptivePortal *x, struct siphash *state) { | |
849 | assert(x); | |
850 | siphash24_compress_string(x->captive_portal, state); | |
851 | } | |
852 | ||
853 | static int ndisc_captive_portal_compare_func(const NDiscCaptivePortal *a, const NDiscCaptivePortal *b) { | |
854 | assert(a); | |
855 | assert(b); | |
856 | return strcmp_ptr(a->captive_portal, b->captive_portal); | |
857 | } | |
858 | ||
859 | DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR( | |
860 | ndisc_captive_portal_hash_ops, | |
861 | NDiscCaptivePortal, | |
862 | ndisc_captive_portal_hash_func, | |
863 | ndisc_captive_portal_compare_func, | |
535134bc | 864 | ndisc_captive_portal_free); |
64de00c4 YW |
865 | |
866 | static int ndisc_router_process_captive_portal(Link *link, sd_ndisc_router *rt) { | |
867 | _cleanup_(ndisc_captive_portal_freep) NDiscCaptivePortal *new_entry = NULL; | |
868 | _cleanup_free_ char *captive_portal = NULL; | |
869 | usec_t lifetime_usec, timestamp_usec; | |
870 | NDiscCaptivePortal *exist; | |
871 | struct in6_addr router; | |
872 | uint16_t lifetime_sec; | |
873 | const char *uri; | |
874 | size_t len; | |
875 | int r; | |
876 | ||
877 | assert(link); | |
878 | assert(link->network); | |
879 | assert(rt); | |
880 | ||
881 | if (!link->network->ipv6_accept_ra_use_captive_portal) | |
882 | return 0; | |
883 | ||
884 | r = sd_ndisc_router_get_address(rt, &router); | |
885 | if (r < 0) | |
886 | return log_link_warning_errno(link, r, "Failed to get router address from RA: %m"); | |
887 | ||
218f3738 YW |
888 | /* RFC 4861 section 4.2. states that the lifetime in the message header should be used only for the |
889 | * default gateway, but the captive portal option does not have a lifetime field, hence, we use the | |
890 | * main lifetime for the portal. */ | |
64de00c4 YW |
891 | r = sd_ndisc_router_get_lifetime(rt, &lifetime_sec); |
892 | if (r < 0) | |
893 | return log_link_warning_errno(link, r, "Failed to get lifetime of RA message: %m"); | |
894 | ||
895 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); | |
896 | if (r < 0) | |
897 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); | |
898 | ||
899 | lifetime_usec = sec16_to_usec(lifetime_sec, timestamp_usec); | |
900 | ||
901 | r = sd_ndisc_router_captive_portal_get_uri(rt, &uri, &len); | |
902 | if (r < 0) | |
903 | return log_link_warning_errno(link, r, "Failed to get captive portal from RA: %m"); | |
904 | ||
905 | if (len == 0) | |
6df82d12 | 906 | return log_link_warning_errno(link, SYNTHETIC_ERRNO(EBADMSG), "Received empty captive portal, ignoring."); |
64de00c4 YW |
907 | |
908 | r = make_cstring(uri, len, MAKE_CSTRING_REFUSE_TRAILING_NUL, &captive_portal); | |
909 | if (r < 0) | |
910 | return log_link_warning_errno(link, r, "Failed to convert captive portal URI: %m"); | |
911 | ||
912 | if (!in_charset(captive_portal, URI_VALID)) | |
6df82d12 | 913 | return log_link_warning_errno(link, SYNTHETIC_ERRNO(EBADMSG), "Received invalid captive portal, ignoring."); |
64de00c4 | 914 | |
218f3738 YW |
915 | if (lifetime_usec == 0) { |
916 | /* Drop the portal with zero lifetime. */ | |
917 | ndisc_captive_portal_free(set_remove(link->ndisc_captive_portals, | |
918 | &(NDiscCaptivePortal) { | |
919 | .captive_portal = captive_portal, | |
920 | })); | |
921 | return 0; | |
922 | } | |
923 | ||
924 | exist = set_get(link->ndisc_captive_portals, | |
925 | &(NDiscCaptivePortal) { | |
926 | .captive_portal = captive_portal, | |
927 | }); | |
64de00c4 YW |
928 | if (exist) { |
929 | /* update existing entry */ | |
930 | exist->router = router; | |
931 | exist->lifetime_usec = lifetime_usec; | |
6df82d12 | 932 | return 1; |
64de00c4 YW |
933 | } |
934 | ||
bf943a9d YW |
935 | if (set_size(link->ndisc_captive_portals) >= NDISC_CAPTIVE_PORTAL_MAX) { |
936 | NDiscCaptivePortal *c, *target = NULL; | |
937 | ||
938 | /* Find the portal who has the minimal lifetime and drop it to store new one. */ | |
939 | SET_FOREACH(c, link->ndisc_captive_portals) | |
940 | if (!target || c->lifetime_usec < target->lifetime_usec) | |
941 | target = c; | |
942 | ||
943 | assert(target); | |
944 | assert(set_remove(link->ndisc_captive_portals, target) == target); | |
945 | ndisc_captive_portal_free(target); | |
946 | } | |
947 | ||
64de00c4 YW |
948 | new_entry = new(NDiscCaptivePortal, 1); |
949 | if (!new_entry) | |
950 | return log_oom(); | |
951 | ||
952 | *new_entry = (NDiscCaptivePortal) { | |
953 | .router = router, | |
954 | .lifetime_usec = lifetime_usec, | |
955 | .captive_portal = TAKE_PTR(captive_portal), | |
956 | }; | |
957 | ||
958 | r = set_ensure_put(&link->ndisc_captive_portals, &ndisc_captive_portal_hash_ops, new_entry); | |
959 | if (r < 0) | |
960 | return log_oom(); | |
961 | assert(r > 0); | |
962 | TAKE_PTR(new_entry); | |
963 | ||
964 | link_dirty(link); | |
6df82d12 | 965 | return 1; |
64de00c4 YW |
966 | } |
967 | ||
6e8f5e4c SS |
968 | static void ndisc_pref64_hash_func(const NDiscPREF64 *x, struct siphash *state) { |
969 | assert(x); | |
970 | ||
971 | siphash24_compress(&x->prefix_len, sizeof(x->prefix_len), state); | |
972 | siphash24_compress(&x->prefix, sizeof(x->prefix), state); | |
973 | } | |
974 | ||
975 | static int ndisc_pref64_compare_func(const NDiscPREF64 *a, const NDiscPREF64 *b) { | |
976 | int r; | |
977 | ||
978 | assert(a); | |
979 | assert(b); | |
980 | ||
981 | r = CMP(a->prefix_len, b->prefix_len); | |
982 | if (r != 0) | |
983 | return r; | |
984 | ||
985 | return memcmp(&a->prefix, &b->prefix, sizeof(a->prefix)); | |
986 | } | |
987 | ||
988 | DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR( | |
989 | ndisc_pref64_hash_ops, | |
990 | NDiscPREF64, | |
991 | ndisc_pref64_hash_func, | |
992 | ndisc_pref64_compare_func, | |
993 | mfree); | |
994 | ||
995 | static int ndisc_router_process_pref64(Link *link, sd_ndisc_router *rt) { | |
996 | _cleanup_free_ NDiscPREF64 *new_entry = NULL; | |
997 | usec_t lifetime_usec, timestamp_usec; | |
998 | struct in6_addr a, router; | |
999 | uint16_t lifetime_sec; | |
1000 | unsigned prefix_len; | |
1001 | NDiscPREF64 *exist; | |
1002 | int r; | |
1003 | ||
1004 | assert(link); | |
1005 | assert(link->network); | |
1006 | assert(rt); | |
1007 | ||
1008 | if (!link->network->ipv6_accept_ra_use_pref64) | |
1009 | return 0; | |
1010 | ||
1011 | r = sd_ndisc_router_get_address(rt, &router); | |
1012 | if (r < 0) | |
1013 | return log_link_warning_errno(link, r, "Failed to get router address from RA: %m"); | |
1014 | ||
1015 | r = sd_ndisc_router_prefix64_get_prefix(rt, &a); | |
1016 | if (r < 0) | |
1017 | return log_link_warning_errno(link, r, "Failed to get pref64 prefix: %m"); | |
1018 | ||
1019 | r = sd_ndisc_router_prefix64_get_prefixlen(rt, &prefix_len); | |
1020 | if (r < 0) | |
1021 | return log_link_warning_errno(link, r, "Failed to get pref64 prefix length: %m"); | |
1022 | ||
1023 | r = sd_ndisc_router_prefix64_get_lifetime_sec(rt, &lifetime_sec); | |
1024 | if (r < 0) | |
1025 | return log_link_warning_errno(link, r, "Failed to get pref64 prefix lifetime: %m"); | |
1026 | ||
1027 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); | |
1028 | if (r < 0) | |
1029 | return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); | |
1030 | ||
1031 | lifetime_usec = sec16_to_usec(lifetime_sec, timestamp_usec); | |
1032 | ||
1033 | if (lifetime_usec == 0) { | |
1034 | free(set_remove(link->ndisc_pref64, | |
1035 | &(NDiscPREF64) { | |
1036 | .prefix = a, | |
1037 | .prefix_len = prefix_len | |
1038 | })); | |
1039 | return 0; | |
1040 | } | |
1041 | ||
1042 | exist = set_get(link->ndisc_pref64, | |
1043 | &(NDiscPREF64) { | |
1044 | .prefix = a, | |
1045 | .prefix_len = prefix_len | |
1046 | }); | |
1047 | if (exist) { | |
1048 | /* update existing entry */ | |
1049 | exist->router = router; | |
1050 | exist->lifetime_usec = lifetime_usec; | |
1051 | return 0; | |
1052 | } | |
1053 | ||
1054 | new_entry = new(NDiscPREF64, 1); | |
1055 | if (!new_entry) | |
1056 | return log_oom(); | |
1057 | ||
1058 | *new_entry = (NDiscPREF64) { | |
1059 | .router = router, | |
1060 | .lifetime_usec = lifetime_usec, | |
1061 | .prefix = a, | |
1062 | .prefix_len = prefix_len, | |
1063 | }; | |
1064 | ||
1065 | r = set_ensure_put(&link->ndisc_pref64, &ndisc_pref64_hash_ops, new_entry); | |
1066 | if (r < 0) | |
1067 | return log_oom(); | |
1068 | ||
1069 | assert(r > 0); | |
1070 | TAKE_PTR(new_entry); | |
1071 | ||
1072 | return 0; | |
1073 | } | |
1074 | ||
e8c9b5b0 | 1075 | static int ndisc_router_process_options(Link *link, sd_ndisc_router *rt) { |
6df82d12 | 1076 | size_t n_captive_portal = 0; |
fbdda4bb YW |
1077 | int r; |
1078 | ||
1e7a0e21 | 1079 | assert(link); |
55d3fdcf | 1080 | assert(link->network); |
1e7a0e21 LP |
1081 | assert(rt); |
1082 | ||
fbdda4bb | 1083 | for (r = sd_ndisc_router_option_rewind(rt); ; r = sd_ndisc_router_option_next(rt)) { |
1e7a0e21 LP |
1084 | uint8_t type; |
1085 | ||
e8c9b5b0 | 1086 | if (r < 0) |
2c5bca17 | 1087 | return log_link_warning_errno(link, r, "Failed to iterate through options: %m"); |
1e7a0e21 | 1088 | if (r == 0) /* EOF */ |
13e8a49a | 1089 | return 0; |
1e7a0e21 LP |
1090 | |
1091 | r = sd_ndisc_router_option_get_type(rt, &type); | |
e8c9b5b0 | 1092 | if (r < 0) |
2c5bca17 | 1093 | return log_link_warning_errno(link, r, "Failed to get RA option type: %m"); |
1e7a0e21 LP |
1094 | |
1095 | switch (type) { | |
fbdda4bb YW |
1096 | case SD_NDISC_OPTION_PREFIX_INFORMATION: |
1097 | r = ndisc_router_process_prefix(link, rt); | |
1e7a0e21 | 1098 | break; |
1e7a0e21 LP |
1099 | |
1100 | case SD_NDISC_OPTION_ROUTE_INFORMATION: | |
13e8a49a | 1101 | r = ndisc_router_process_route(link, rt); |
1e7a0e21 LP |
1102 | break; |
1103 | ||
1104 | case SD_NDISC_OPTION_RDNSS: | |
ad0b2df6 | 1105 | r = ndisc_router_process_rdnss(link, rt); |
1e7a0e21 LP |
1106 | break; |
1107 | ||
1108 | case SD_NDISC_OPTION_DNSSL: | |
ad0b2df6 | 1109 | r = ndisc_router_process_dnssl(link, rt); |
1e7a0e21 | 1110 | break; |
9747955d | 1111 | case SD_NDISC_OPTION_CAPTIVE_PORTAL: |
6df82d12 YW |
1112 | if (n_captive_portal > 0) { |
1113 | if (n_captive_portal == 1) | |
1114 | log_link_notice(link, "Received RA with multiple captive portals, only using the first one."); | |
1115 | ||
1116 | n_captive_portal++; | |
1117 | continue; | |
1118 | } | |
9747955d | 1119 | r = ndisc_router_process_captive_portal(link, rt); |
6df82d12 YW |
1120 | if (r > 0) |
1121 | n_captive_portal++; | |
9747955d | 1122 | break; |
6e8f5e4c SS |
1123 | case SD_NDISC_OPTION_PREF64: |
1124 | r = ndisc_router_process_pref64(link, rt); | |
1125 | break; | |
1e7a0e21 | 1126 | } |
5908d864 YW |
1127 | if (r < 0 && r != -EBADMSG) |
1128 | return r; | |
1e7a0e21 LP |
1129 | } |
1130 | } | |
1131 | ||
2b4fca55 | 1132 | static int ndisc_drop_outdated(Link *link, usec_t timestamp_usec) { |
94e6d37c YW |
1133 | bool updated = false; |
1134 | NDiscDNSSL *dnssl; | |
1135 | NDiscRDNSS *rdnss; | |
64de00c4 | 1136 | NDiscCaptivePortal *cp; |
fabea9c0 | 1137 | NDiscPREF64 *p64; |
94e6d37c YW |
1138 | Address *address; |
1139 | Route *route; | |
1140 | int r = 0, k; | |
1141 | ||
1142 | assert(link); | |
1143 | ||
1144 | /* If an address or friends is already assigned, but not valid anymore, then refuse to update it, | |
1145 | * and let's immediately remove it. | |
1146 | * See RFC4862, section 5.5.3.e. But the following logic is deviated from RFC4862 by honoring all | |
1147 | * valid lifetimes to improve the reaction of SLAAC to renumbering events. | |
1148 | * See draft-ietf-6man-slaac-renum-02, section 4.2. */ | |
1149 | ||
1150 | SET_FOREACH(route, link->routes) { | |
1151 | if (route->source != NETWORK_CONFIG_SOURCE_NDISC) | |
1152 | continue; | |
1153 | ||
1154 | if (route->lifetime_usec >= timestamp_usec) | |
1155 | continue; /* the route is still valid */ | |
1156 | ||
1157 | k = route_remove_and_drop(route); | |
1158 | if (k < 0) | |
1159 | r = log_link_warning_errno(link, k, "Failed to remove outdated SLAAC route, ignoring: %m"); | |
1160 | } | |
1161 | ||
1162 | SET_FOREACH(address, link->addresses) { | |
1163 | if (address->source != NETWORK_CONFIG_SOURCE_NDISC) | |
1164 | continue; | |
1165 | ||
1166 | if (address->lifetime_valid_usec >= timestamp_usec) | |
1167 | continue; /* the address is still valid */ | |
1168 | ||
1169 | k = address_remove_and_drop(address); | |
1170 | if (k < 0) | |
1171 | r = log_link_warning_errno(link, k, "Failed to remove outdated SLAAC address, ignoring: %m"); | |
1172 | } | |
1173 | ||
1174 | SET_FOREACH(rdnss, link->ndisc_rdnss) { | |
1175 | if (rdnss->lifetime_usec >= timestamp_usec) | |
1176 | continue; /* the DNS server is still valid */ | |
1177 | ||
1178 | free(set_remove(link->ndisc_rdnss, rdnss)); | |
1179 | updated = true; | |
1180 | } | |
1181 | ||
1182 | SET_FOREACH(dnssl, link->ndisc_dnssl) { | |
1183 | if (dnssl->lifetime_usec >= timestamp_usec) | |
1184 | continue; /* the DNS domain is still valid */ | |
1185 | ||
1186 | free(set_remove(link->ndisc_dnssl, dnssl)); | |
1187 | updated = true; | |
1188 | } | |
1189 | ||
64de00c4 YW |
1190 | SET_FOREACH(cp, link->ndisc_captive_portals) { |
1191 | if (cp->lifetime_usec >= timestamp_usec) | |
1192 | continue; /* the captive portal is still valid */ | |
1193 | ||
75a91226 | 1194 | ndisc_captive_portal_free(set_remove(link->ndisc_captive_portals, cp)); |
64de00c4 YW |
1195 | updated = true; |
1196 | } | |
1197 | ||
fabea9c0 YW |
1198 | SET_FOREACH(p64, link->ndisc_pref64) { |
1199 | if (p64->lifetime_usec >= timestamp_usec) | |
1200 | continue; /* the pref64 prefix is still valid */ | |
1201 | ||
1202 | free(set_remove(link->ndisc_pref64, p64)); | |
1203 | /* The pref64 prefix is not exported through the state file, hence it is not necessary to set | |
1204 | * the 'updated' flag. */ | |
1205 | } | |
1206 | ||
94e6d37c YW |
1207 | if (updated) |
1208 | link_dirty(link); | |
1209 | ||
1210 | return r; | |
1211 | } | |
1212 | ||
77302468 YW |
1213 | static int ndisc_setup_expire(Link *link); |
1214 | ||
1215 | static int ndisc_expire_handler(sd_event_source *s, uint64_t usec, void *userdata) { | |
1216 | Link *link = ASSERT_PTR(userdata); | |
1217 | usec_t now_usec; | |
1218 | ||
1219 | assert(link->manager); | |
1220 | ||
1221 | assert_se(sd_event_now(link->manager->event, CLOCK_BOOTTIME, &now_usec) >= 0); | |
1222 | ||
2b4fca55 | 1223 | (void) ndisc_drop_outdated(link, now_usec); |
77302468 YW |
1224 | (void) ndisc_setup_expire(link); |
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | static int ndisc_setup_expire(Link *link) { | |
1229 | usec_t lifetime_usec = USEC_INFINITY; | |
64de00c4 | 1230 | NDiscCaptivePortal *cp; |
77302468 YW |
1231 | NDiscDNSSL *dnssl; |
1232 | NDiscRDNSS *rdnss; | |
fabea9c0 | 1233 | NDiscPREF64 *p64; |
77302468 YW |
1234 | Address *address; |
1235 | Route *route; | |
1236 | int r; | |
1237 | ||
1238 | assert(link); | |
1239 | assert(link->manager); | |
1240 | ||
1241 | SET_FOREACH(route, link->routes) { | |
1242 | if (route->source != NETWORK_CONFIG_SOURCE_NDISC) | |
1243 | continue; | |
1244 | ||
1245 | if (!route_exists(route)) | |
1246 | continue; | |
1247 | ||
1248 | lifetime_usec = MIN(lifetime_usec, route->lifetime_usec); | |
1249 | } | |
1250 | ||
1251 | SET_FOREACH(address, link->addresses) { | |
1252 | if (address->source != NETWORK_CONFIG_SOURCE_NDISC) | |
1253 | continue; | |
1254 | ||
1255 | if (!address_exists(address)) | |
1256 | continue; | |
1257 | ||
1258 | lifetime_usec = MIN(lifetime_usec, address->lifetime_valid_usec); | |
1259 | } | |
1260 | ||
1261 | SET_FOREACH(rdnss, link->ndisc_rdnss) | |
1262 | lifetime_usec = MIN(lifetime_usec, rdnss->lifetime_usec); | |
1263 | ||
1264 | SET_FOREACH(dnssl, link->ndisc_dnssl) | |
1265 | lifetime_usec = MIN(lifetime_usec, dnssl->lifetime_usec); | |
1266 | ||
64de00c4 YW |
1267 | SET_FOREACH(cp, link->ndisc_captive_portals) |
1268 | lifetime_usec = MIN(lifetime_usec, cp->lifetime_usec); | |
1269 | ||
fabea9c0 YW |
1270 | SET_FOREACH(p64, link->ndisc_pref64) |
1271 | lifetime_usec = MIN(lifetime_usec, p64->lifetime_usec); | |
1272 | ||
77302468 YW |
1273 | if (lifetime_usec == USEC_INFINITY) |
1274 | return 0; | |
1275 | ||
1276 | r = event_reset_time(link->manager->event, &link->ndisc_expire, CLOCK_BOOTTIME, | |
1277 | lifetime_usec, 0, ndisc_expire_handler, link, 0, "ndisc-expiration", true); | |
1278 | if (r < 0) | |
1279 | return log_link_warning_errno(link, r, "Failed to update expiration timer for ndisc: %m"); | |
1280 | ||
1281 | return 0; | |
1282 | } | |
1283 | ||
928112a4 YW |
1284 | static int ndisc_start_dhcp6_client(Link *link, sd_ndisc_router *rt) { |
1285 | int r; | |
1286 | ||
1287 | assert(link); | |
1288 | assert(link->network); | |
1289 | ||
1290 | switch (link->network->ipv6_accept_ra_start_dhcp6_client) { | |
1291 | case IPV6_ACCEPT_RA_START_DHCP6_CLIENT_NO: | |
1292 | return 0; | |
1293 | ||
1294 | case IPV6_ACCEPT_RA_START_DHCP6_CLIENT_YES: { | |
1295 | uint64_t flags; | |
1296 | ||
1297 | r = sd_ndisc_router_get_flags(rt, &flags); | |
1298 | if (r < 0) | |
1299 | return log_link_warning_errno(link, r, "Failed to get RA flags: %m"); | |
1300 | ||
1301 | if ((flags & (ND_RA_FLAG_MANAGED | ND_RA_FLAG_OTHER)) == 0) | |
1302 | return 0; | |
1303 | ||
1304 | /* (re)start DHCPv6 client in stateful or stateless mode according to RA flags. | |
0bcc6557 AH |
1305 | * Note, if both "managed" and "other configuration" bits are set, then ignore |
1306 | * "other configuration" bit. See RFC 4861. */ | |
fac19a21 | 1307 | r = dhcp6_start_on_ra(link, !(flags & ND_RA_FLAG_MANAGED)); |
928112a4 YW |
1308 | break; |
1309 | } | |
1310 | case IPV6_ACCEPT_RA_START_DHCP6_CLIENT_ALWAYS: | |
0bcc6557 | 1311 | /* When IPv6AcceptRA.DHCPv6Client=always, start dhcp6 client in solicit mode |
928112a4 | 1312 | * even if the router flags have neither M nor O flags. */ |
fac19a21 | 1313 | r = dhcp6_start_on_ra(link, /* information_request = */ false); |
928112a4 YW |
1314 | break; |
1315 | ||
1316 | default: | |
1317 | assert_not_reached(); | |
1318 | } | |
1319 | ||
1320 | if (r < 0) | |
2c5bca17 | 1321 | return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease on NDisc request: %m"); |
928112a4 YW |
1322 | |
1323 | log_link_debug(link, "Acquiring DHCPv6 lease on NDisc request"); | |
1324 | return 0; | |
1325 | } | |
1326 | ||
d5017c84 | 1327 | static int ndisc_router_handler(Link *link, sd_ndisc_router *rt) { |
b8ce3b44 | 1328 | struct in6_addr router; |
94e6d37c | 1329 | usec_t timestamp_usec; |
86e2be7b | 1330 | int r; |
1e7a0e21 LP |
1331 | |
1332 | assert(link); | |
1333 | assert(link->network); | |
1334 | assert(link->manager); | |
1335 | assert(rt); | |
1336 | ||
b8ce3b44 | 1337 | r = sd_ndisc_router_get_address(rt, &router); |
5908d864 YW |
1338 | if (r == -ENODATA) { |
1339 | log_link_debug(link, "Received RA without router address, ignoring."); | |
1340 | return 0; | |
1341 | } | |
75d26411 | 1342 | if (r < 0) |
2c5bca17 | 1343 | return log_link_warning_errno(link, r, "Failed to get router address from RA: %m"); |
75d26411 | 1344 | |
c995fa02 | 1345 | if (in6_prefix_is_filtered(&router, 128, link->network->ndisc_allow_listed_router, link->network->ndisc_deny_listed_router)) { |
75d26411 | 1346 | if (DEBUG_LOGGING) { |
75d26411 | 1347 | if (!set_isempty(link->network->ndisc_allow_listed_router)) |
84dbb3fd | 1348 | log_link_debug(link, "Router %s is not in allow list, ignoring.", IN6_ADDR_TO_STRING(&router)); |
75d26411 | 1349 | else |
84dbb3fd | 1350 | log_link_debug(link, "Router %s is in deny list, ignoring.", IN6_ADDR_TO_STRING(&router)); |
75d26411 YW |
1351 | } |
1352 | return 0; | |
1353 | } | |
1354 | ||
94e6d37c | 1355 | r = sd_ndisc_router_get_timestamp(rt, CLOCK_BOOTTIME, ×tamp_usec); |
5908d864 YW |
1356 | if (r == -ENODATA) { |
1357 | log_link_debug(link, "Received RA without timestamp, ignoring."); | |
1358 | return 0; | |
1359 | } | |
94e6d37c YW |
1360 | if (r < 0) |
1361 | return r; | |
1362 | ||
2b4fca55 | 1363 | r = ndisc_drop_outdated(link, timestamp_usec); |
94e6d37c | 1364 | if (r < 0) |
2b4fca55 | 1365 | return r; |
94e6d37c | 1366 | |
928112a4 YW |
1367 | r = ndisc_start_dhcp6_client(link, rt); |
1368 | if (r < 0) | |
1369 | return r; | |
1e7a0e21 | 1370 | |
13e8a49a YW |
1371 | r = ndisc_router_process_default(link, rt); |
1372 | if (r < 0) | |
1373 | return r; | |
fbdda4bb | 1374 | |
13e8a49a YW |
1375 | r = ndisc_router_process_options(link, rt); |
1376 | if (r < 0) | |
1377 | return r; | |
d5017c84 | 1378 | |
77302468 YW |
1379 | r = ndisc_setup_expire(link); |
1380 | if (r < 0) | |
1381 | return r; | |
1382 | ||
2ccada8d | 1383 | if (link->ndisc_messages == 0) |
3b6a3bde | 1384 | link->ndisc_configured = true; |
2ccada8d | 1385 | else |
3b6a3bde | 1386 | log_link_debug(link, "Setting SLAAC addresses and router."); |
69203fba | 1387 | |
3b6a3bde | 1388 | if (!link->ndisc_configured) |
69203fba YW |
1389 | link_set_state(link, LINK_STATE_CONFIGURING); |
1390 | ||
76c5a0f2 | 1391 | link_check_ready(link); |
69203fba | 1392 | return 0; |
1e7a0e21 LP |
1393 | } |
1394 | ||
2324fd3a | 1395 | static void ndisc_handler(sd_ndisc *nd, sd_ndisc_event_t event, sd_ndisc_router *rt, void *userdata) { |
99534007 | 1396 | Link *link = ASSERT_PTR(userdata); |
13e8a49a | 1397 | int r; |
a13c50e7 | 1398 | |
9d96e6c3 TG |
1399 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
1400 | return; | |
a13c50e7 | 1401 | |
9d96e6c3 | 1402 | switch (event) { |
1e7a0e21 LP |
1403 | |
1404 | case SD_NDISC_EVENT_ROUTER: | |
13e8a49a | 1405 | r = ndisc_router_handler(link, rt); |
5908d864 | 1406 | if (r < 0 && r != -EBADMSG) { |
13e8a49a YW |
1407 | link_enter_failed(link); |
1408 | return; | |
1409 | } | |
1e7a0e21 LP |
1410 | break; |
1411 | ||
9d96e6c3 | 1412 | case SD_NDISC_EVENT_TIMEOUT: |
a8c10331 | 1413 | log_link_debug(link, "NDisc handler get timeout event"); |
3b6a3bde YW |
1414 | if (link->ndisc_messages == 0) { |
1415 | link->ndisc_configured = true; | |
3336e946 YW |
1416 | link_check_ready(link); |
1417 | } | |
9d96e6c3 TG |
1418 | break; |
1419 | default: | |
04499a70 | 1420 | assert_not_reached(); |
a13c50e7 TG |
1421 | } |
1422 | } | |
1423 | ||
ba4c7184 | 1424 | static int ndisc_configure(Link *link) { |
a13c50e7 TG |
1425 | int r; |
1426 | ||
1e7a0e21 LP |
1427 | assert(link); |
1428 | ||
2ffd6d73 YW |
1429 | if (!link_ipv6_accept_ra_enabled(link)) |
1430 | return 0; | |
a13c50e7 | 1431 | |
5c078687 | 1432 | if (link->ndisc) |
bc9e40c9 | 1433 | return -EBUSY; /* Already configured. */ |
2ffd6d73 | 1434 | |
5c078687 YW |
1435 | r = sd_ndisc_new(&link->ndisc); |
1436 | if (r < 0) | |
1437 | return r; | |
1438 | ||
1439 | r = sd_ndisc_attach_event(link->ndisc, link->manager->event, 0); | |
1440 | if (r < 0) | |
1441 | return r; | |
a13c50e7 | 1442 | |
3be64aa4 YW |
1443 | if (link->hw_addr.length == ETH_ALEN) { |
1444 | r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether); | |
1445 | if (r < 0) | |
1446 | return r; | |
1447 | } | |
a13c50e7 | 1448 | |
1e7a0e21 | 1449 | r = sd_ndisc_set_ifindex(link->ndisc, link->ifindex); |
a13c50e7 TG |
1450 | if (r < 0) |
1451 | return r; | |
1452 | ||
1e7a0e21 | 1453 | r = sd_ndisc_set_callback(link->ndisc, ndisc_handler, link); |
a13c50e7 TG |
1454 | if (r < 0) |
1455 | return r; | |
1456 | ||
1e7a0e21 LP |
1457 | return 0; |
1458 | } | |
1459 | ||
294f129b | 1460 | int ndisc_start(Link *link) { |
ba4c7184 YW |
1461 | int r; |
1462 | ||
294f129b YW |
1463 | assert(link); |
1464 | ||
1465 | if (!link->ndisc || !link->dhcp6_client) | |
1466 | return 0; | |
1467 | ||
ccffa166 YW |
1468 | if (!link_has_carrier(link)) |
1469 | return 0; | |
1470 | ||
3b6a3bde YW |
1471 | if (in6_addr_is_null(&link->ipv6ll_address)) |
1472 | return 0; | |
1473 | ||
294f129b YW |
1474 | log_link_debug(link, "Discovering IPv6 routers"); |
1475 | ||
ba4c7184 YW |
1476 | r = sd_ndisc_start(link->ndisc); |
1477 | if (r < 0) | |
1478 | return r; | |
1479 | ||
1480 | return 1; | |
1481 | } | |
1482 | ||
09d09207 | 1483 | static int ndisc_process_request(Request *req, Link *link, void *userdata) { |
ba4c7184 YW |
1484 | int r; |
1485 | ||
ff51134c | 1486 | assert(link); |
ba4c7184 | 1487 | |
4b482e8b | 1488 | if (!link_is_ready_to_configure(link, /* allow_unmanaged = */ false)) |
ba4c7184 YW |
1489 | return 0; |
1490 | ||
ba4c7184 YW |
1491 | r = ndisc_configure(link); |
1492 | if (r < 0) | |
1493 | return log_link_warning_errno(link, r, "Failed to configure IPv6 Router Discovery: %m"); | |
1494 | ||
1495 | r = ndisc_start(link); | |
1496 | if (r < 0) | |
1497 | return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m"); | |
1498 | ||
1499 | log_link_debug(link, "IPv6 Router Discovery is configured%s.", | |
1500 | r > 0 ? " and started" : ""); | |
ba4c7184 YW |
1501 | return 1; |
1502 | } | |
1503 | ||
1504 | int link_request_ndisc(Link *link) { | |
1505 | int r; | |
1506 | ||
1507 | assert(link); | |
1508 | ||
1509 | if (!link_ipv6_accept_ra_enabled(link)) | |
1510 | return 0; | |
1511 | ||
1512 | if (link->ndisc) | |
1513 | return 0; | |
1514 | ||
09d09207 | 1515 | r = link_queue_request(link, REQUEST_TYPE_NDISC, ndisc_process_request, NULL); |
ba4c7184 YW |
1516 | if (r < 0) |
1517 | return log_link_warning_errno(link, r, "Failed to request configuring of the IPv6 Router Discovery: %m"); | |
1518 | ||
1519 | log_link_debug(link, "Requested configuring of the IPv6 Router Discovery."); | |
1520 | return 0; | |
294f129b YW |
1521 | } |
1522 | ||
77302468 YW |
1523 | int ndisc_stop(Link *link) { |
1524 | assert(link); | |
1525 | ||
1526 | link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire); | |
1527 | ||
1528 | return sd_ndisc_stop(link->ndisc); | |
1529 | } | |
1530 | ||
1531 | ||
c69305ff LP |
1532 | void ndisc_flush(Link *link) { |
1533 | assert(link); | |
1534 | ||
64de00c4 | 1535 | /* Remove all RDNSS, DNSSL, and Captive Portal entries, without exception. */ |
c69305ff | 1536 | |
b0b97766 YW |
1537 | link->ndisc_rdnss = set_free(link->ndisc_rdnss); |
1538 | link->ndisc_dnssl = set_free(link->ndisc_dnssl); | |
64de00c4 | 1539 | link->ndisc_captive_portals = set_free(link->ndisc_captive_portals); |
6e8f5e4c | 1540 | link->ndisc_pref64 = set_free(link->ndisc_pref64); |
c69305ff | 1541 | } |
e520ce64 | 1542 | |
ac24e418 SS |
1543 | static const char* const ipv6_accept_ra_start_dhcp6_client_table[_IPV6_ACCEPT_RA_START_DHCP6_CLIENT_MAX] = { |
1544 | [IPV6_ACCEPT_RA_START_DHCP6_CLIENT_NO] = "no", | |
1545 | [IPV6_ACCEPT_RA_START_DHCP6_CLIENT_ALWAYS] = "always", | |
1546 | [IPV6_ACCEPT_RA_START_DHCP6_CLIENT_YES] = "yes", | |
1547 | }; | |
1548 | ||
3b6a3bde YW |
1549 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING_WITH_BOOLEAN(ipv6_accept_ra_start_dhcp6_client, IPv6AcceptRAStartDHCP6Client, IPV6_ACCEPT_RA_START_DHCP6_CLIENT_YES); |
1550 | ||
1551 | DEFINE_CONFIG_PARSE_ENUM(config_parse_ipv6_accept_ra_use_domains, dhcp_use_domains, DHCPUseDomains, | |
1552 | "Failed to parse UseDomains= setting"); | |
1553 | DEFINE_CONFIG_PARSE_ENUM(config_parse_ipv6_accept_ra_start_dhcp6_client, ipv6_accept_ra_start_dhcp6_client, IPv6AcceptRAStartDHCP6Client, | |
1554 | "Failed to parse DHCPv6Client= setting"); |