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[thirdparty/systemd.git] / src / network / networkd-radv.c
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db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
091214b6 2/***
810adae9 3 Copyright © 2017 Intel Corporation. All rights reserved.
091214b6
PF		 4***/
5
6#include <netinet/icmp6.h>
7#include <arpa/inet.h>
8
ca5ad760 9#include "dns-domain.h"
b5ce4047 10#include "networkd-link.h"
c555a358 11#include "networkd-manager.h"
b5ce4047 12#include "networkd-network.h"
091214b6 13#include "networkd-radv.h"
6e849e95 14#include "parse-util.h"
6e849e95 15#include "string-util.h"
6b1dec66 16#include "string-table.h"
51517f9e 17#include "strv.h"
6e849e95 18
064dfb05 19Prefix *prefix_free(Prefix *prefix) {
6e849e95 20 if (!prefix)
064dfb05 21 return NULL;
6e849e95
PF		 22
23 if (prefix->network) {
ecb0e85e
YW		 24 assert(prefix->section);
25 hashmap_remove(prefix->network->prefixes_by_section, prefix->section);
6e849e95
PF		 26 }
27
ecee0abe 28 network_config_section_free(prefix->section);
471e126b 29 sd_radv_prefix_unref(prefix->radv_prefix);
6e849e95 30
064dfb05 31 return mfree(prefix);
6e849e95
PF		 32}
33
064dfb05
YW		 34DEFINE_NETWORK_SECTION_FUNCTIONS(Prefix, prefix_free);
35
95081e08 36static int prefix_new(Prefix **ret) {
15b8332e 37 _cleanup_(prefix_freep) Prefix *prefix = NULL;
6e849e95
PF		 38
39 prefix = new0(Prefix, 1);
40 if (!prefix)
41 return -ENOMEM;
42
43 if (sd_radv_prefix_new(&prefix->radv_prefix) < 0)
44 return -ENOMEM;
45
ae2a15bc 46 *ret = TAKE_PTR(prefix);
6e849e95
PF		 47
48 return 0;
49}
50
a8d4a210 51static int prefix_new_static(Network *network, const char *filename, unsigned section_line, Prefix **ret) {
8e766630
LP		 52 _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
53 _cleanup_(prefix_freep) Prefix *prefix = NULL;
6e849e95
PF		 54 int r;
55
56 assert(network);
57 assert(ret);
ecb0e85e
YW		 58 assert(filename);
59 assert(section_line > 0);
6e849e95 60
ecb0e85e
YW		 61 r = network_config_section_new(filename, section_line, &n);
62 if (r < 0)
63 return r;
6e849e95 64
ecb0e85e
YW		 65 prefix = hashmap_get(network->prefixes_by_section, n);
66 if (prefix) {
67 *ret = TAKE_PTR(prefix);
68 return 0;
6e849e95
PF		 69 }
70
71 r = prefix_new(&prefix);
72 if (r < 0)
73 return r;
74
0f7f2769 75 prefix->network = network;
ecb0e85e 76 prefix->section = TAKE_PTR(n);
6e849e95 77
b9eea0a7 78 r = hashmap_ensure_put(&network->prefixes_by_section, &network_config_hash_ops, prefix->section, prefix);
ecb0e85e
YW		 79 if (r < 0)
80 return r;
6e849e95 81
1cc6c93a 82 *ret = TAKE_PTR(prefix);
6e849e95
PF		 83
84 return 0;
85}
86
064dfb05 87RoutePrefix *route_prefix_free(RoutePrefix *prefix) {
203d4df5 88 if (!prefix)
064dfb05 89 return NULL;
203d4df5
SS		 90
91 if (prefix->network) {
ecb0e85e
YW		 92 assert(prefix->section);
93 hashmap_remove(prefix->network->route_prefixes_by_section, prefix->section);
203d4df5
SS		 94 }
95
96 network_config_section_free(prefix->section);
471e126b 97 sd_radv_route_prefix_unref(prefix->radv_route_prefix);
203d4df5 98
064dfb05
YW		 99 return mfree(prefix);
100}
101
102DEFINE_NETWORK_SECTION_FUNCTIONS(RoutePrefix, route_prefix_free);
103
104static int route_prefix_new(RoutePrefix **ret) {
105 _cleanup_(route_prefix_freep) RoutePrefix *prefix = NULL;
106
107 prefix = new0(RoutePrefix, 1);
108 if (!prefix)
109 return -ENOMEM;
110
111 if (sd_radv_route_prefix_new(&prefix->radv_route_prefix) < 0)
112 return -ENOMEM;
113
114 *ret = TAKE_PTR(prefix);
115
116 return 0;
203d4df5
SS		 117}
118
a8d4a210 119static int route_prefix_new_static(Network *network, const char *filename, unsigned section_line, RoutePrefix **ret) {
203d4df5 120 _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
95081e08 121 _cleanup_(route_prefix_freep) RoutePrefix *prefix = NULL;
203d4df5
SS		 122 int r;
123
124 assert(network);
125 assert(ret);
ecb0e85e
YW		 126 assert(filename);
127 assert(section_line > 0);
203d4df5 128
ecb0e85e
YW		 129 r = network_config_section_new(filename, section_line, &n);
130 if (r < 0)
131 return r;
203d4df5 132
ecb0e85e
YW		 133 prefix = hashmap_get(network->route_prefixes_by_section, n);
134 if (prefix) {
135 *ret = TAKE_PTR(prefix);
136 return 0;
203d4df5
SS		 137 }
138
139 r = route_prefix_new(&prefix);
140 if (r < 0)
141 return r;
142
143 prefix->network = network;
ecb0e85e 144 prefix->section = TAKE_PTR(n);
203d4df5 145
b2cb2e82 146 r = hashmap_ensure_put(&network->route_prefixes_by_section, &network_config_hash_ops, prefix->section, prefix);
ecb0e85e
YW		 147 if (r < 0)
148 return r;
203d4df5
SS		 149
150 *ret = TAKE_PTR(prefix);
151
152 return 0;
153}
154
13ffa39f 155void network_drop_invalid_prefixes(Network *network) {
1a7deb2f
YW		 156 Prefix *prefix;
157
158 assert(network);
159
160 HASHMAP_FOREACH(prefix, network->prefixes_by_section)
161 if (section_is_invalid(prefix->section))
162 prefix_free(prefix);
163}
164
13ffa39f 165void network_drop_invalid_route_prefixes(Network *network) {
1a7deb2f
YW		 166 RoutePrefix *prefix;
167
168 assert(network);
169
170 HASHMAP_FOREACH(prefix, network->route_prefixes_by_section)
171 if (section_is_invalid(prefix->section))
172 route_prefix_free(prefix);
173}
174
69e0f833
YW		 175void network_adjust_radv(Network *network) {
176 assert(network);
177
e502f94d
YW		 178 /* After this function is called, network->router_prefix_delegation can be treated as a boolean. */
179
180 if (network->dhcp6_pd < 0)
181 /* For backward compatibility. */
182 network->dhcp6_pd = FLAGS_SET(network->router_prefix_delegation, RADV_PREFIX_DELEGATION_DHCP6);
183
69e0f833
YW		 184 if (!FLAGS_SET(network->link_local, ADDRESS_FAMILY_IPV6)) {
185 if (network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE)
186 log_warning("%s: IPv6PrefixDelegation= is enabled but IPv6 link local addressing is disabled. "
187 "Disabling IPv6PrefixDelegation=.", network->filename);
188
189 network->router_prefix_delegation = RADV_PREFIX_DELEGATION_NONE;
190 }
191
192 if (network->router_prefix_delegation == RADV_PREFIX_DELEGATION_NONE) {
193 network->n_router_dns = 0;
194 network->router_dns = mfree(network->router_dns);
195 network->router_search_domains = ordered_set_free(network->router_search_domains);
8a08bbfc
YW		 196 }
197
198 if (!FLAGS_SET(network->router_prefix_delegation, RADV_PREFIX_DELEGATION_STATIC)) {
69e0f833
YW		 199 network->prefixes_by_section = hashmap_free_with_destructor(network->prefixes_by_section, prefix_free);
200 network->route_prefixes_by_section = hashmap_free_with_destructor(network->route_prefixes_by_section, route_prefix_free);
201 }
202}
203
a8d4a210
YW		 204int config_parse_prefix(
205 const char *unit,
206 const char *filename,
207 unsigned line,
208 const char *section,
209 unsigned section_line,
210 const char *lvalue,
211 int ltype,
212 const char *rvalue,
213 void *data,
214 void *userdata) {
6e849e95
PF		 215
216 Network *network = userdata;
fcbf4cb7 217 _cleanup_(prefix_free_or_set_invalidp) Prefix *p = NULL;
6e849e95
PF		 218 uint8_t prefixlen = 64;
219 union in_addr_union in6addr;
220 int r;
221
222 assert(filename);
223 assert(section);
224 assert(lvalue);
225 assert(rvalue);
226 assert(data);
227
228 r = prefix_new_static(network, filename, section_line, &p);
229 if (r < 0)
d96edb2c 230 return log_oom();
6e849e95
PF		 231
232 r = in_addr_prefix_from_string(rvalue, AF_INET6, &in6addr, &prefixlen);
233 if (r < 0) {
d96edb2c 234 log_syntax(unit, LOG_WARNING, filename, line, r, "Prefix is invalid, ignoring assignment: %s", rvalue);
6e849e95
PF		 235 return 0;
236 }
237
c9778516
YW		 238 r = sd_radv_prefix_set_prefix(p->radv_prefix, &in6addr.in6, prefixlen);
239 if (r < 0) {
240 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to set radv prefix, ignoring assignment: %s", rvalue);
241 return 0;
242 }
6e849e95
PF		 243
244 p = NULL;
245
246 return 0;
247}
248
a8d4a210
YW		 249int config_parse_prefix_flags(
250 const char *unit,
251 const char *filename,
252 unsigned line,
253 const char *section,
254 unsigned section_line,
255 const char *lvalue,
256 int ltype,
257 const char *rvalue,
258 void *data,
259 void *userdata) {
260
6e849e95 261 Network *network = userdata;
fcbf4cb7 262 _cleanup_(prefix_free_or_set_invalidp) Prefix *p = NULL;
c9778516 263 int r;
6e849e95
PF		 264
265 assert(filename);
266 assert(section);
267 assert(lvalue);
268 assert(rvalue);
269 assert(data);
270
271 r = prefix_new_static(network, filename, section_line, &p);
272 if (r < 0)
d96edb2c 273 return log_oom();
6e849e95
PF		 274
275 r = parse_boolean(rvalue);
276 if (r < 0) {
c9778516 277 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse %s=, ignoring assignment: %s", lvalue, rvalue);
6e849e95
PF		 278 return 0;
279 }
280
6e849e95 281 if (streq(lvalue, "OnLink"))
c9778516 282 r = sd_radv_prefix_set_onlink(p->radv_prefix, r);
6e849e95 283 else if (streq(lvalue, "AddressAutoconfiguration"))
c9778516
YW		 284 r = sd_radv_prefix_set_address_autoconfiguration(p->radv_prefix, r);
285 if (r < 0) {
286 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to set %s=, ignoring assignment: %m", lvalue);
287 return 0;
288 }
6e849e95
PF		 289
290 p = NULL;
291
292 return 0;
293}
294
a8d4a210
YW		 295int config_parse_prefix_lifetime(
296 const char *unit,
297 const char *filename,
298 unsigned line,
299 const char *section,
300 unsigned section_line,
301 const char *lvalue,
302 int ltype,
303 const char *rvalue,
304 void *data,
305 void *userdata) {
306
6e849e95 307 Network *network = userdata;
fcbf4cb7 308 _cleanup_(prefix_free_or_set_invalidp) Prefix *p = NULL;
6e849e95
PF		 309 usec_t usec;
310 int r;
311
312 assert(filename);
313 assert(section);
314 assert(lvalue);
315 assert(rvalue);
316 assert(data);
317
318 r = prefix_new_static(network, filename, section_line, &p);
319 if (r < 0)
d96edb2c 320 return log_oom();
6e849e95
PF		 321
322 r = parse_sec(rvalue, &usec);
323 if (r < 0) {
d96edb2c 324 log_syntax(unit, LOG_WARNING, filename, line, r, "Lifetime is invalid, ignoring assignment: %s", rvalue);
6e849e95
PF		 325 return 0;
326 }
327
328 /* a value of 0xffffffff represents infinity */
329 if (streq(lvalue, "PreferredLifetimeSec"))
330 r = sd_radv_prefix_set_preferred_lifetime(p->radv_prefix,
331 DIV_ROUND_UP(usec, USEC_PER_SEC));
332 else if (streq(lvalue, "ValidLifetimeSec"))
333 r = sd_radv_prefix_set_valid_lifetime(p->radv_prefix,
334 DIV_ROUND_UP(usec, USEC_PER_SEC));
c9778516
YW		 335 if (r < 0) {
336 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to set %s=, ignoring assignment: %m", lvalue);
337 return 0;
338 }
6e849e95
PF		 339
340 p = NULL;
341
342 return 0;
343}
091214b6 344
bd6379ec
SS		 345int config_parse_prefix_assign(
346 const char *unit,
347 const char *filename,
348 unsigned line,
349 const char *section,
350 unsigned section_line,
351 const char *lvalue,
352 int ltype,
353 const char *rvalue,
354 void *data,
355 void *userdata) {
356
357 Network *network = userdata;
358 _cleanup_(prefix_free_or_set_invalidp) Prefix *p = NULL;
359 int r;
360
361 assert(filename);
362 assert(section);
363 assert(lvalue);
364 assert(rvalue);
365 assert(data);
366
367 r = prefix_new_static(network, filename, section_line, &p);
368 if (r < 0)
d96edb2c 369 return log_oom();
bd6379ec
SS		 370
371 r = parse_boolean(rvalue);
372 if (r < 0) {
d96edb2c 373 log_syntax(unit, LOG_WARNING, filename, line, r,
bd6379ec
SS		 374 "Failed to parse %s=, ignoring assignment: %s",
375 lvalue, rvalue);
376 return 0;
377 }
378
379 p->assign = r;
380 p = NULL;
381
382 return 0;
383}
384
0e1fb1d0
YW		 385int config_parse_prefix_metric(
386 const char *unit,
387 const char *filename,
388 unsigned line,
389 const char *section,
390 unsigned section_line,
391 const char *lvalue,
392 int ltype,
393 const char *rvalue,
394 void *data,
395 void *userdata) {
396
397 Network *network = userdata;
398 _cleanup_(prefix_free_or_set_invalidp) Prefix *p = NULL;
399 int r;
400
401 assert(filename);
402 assert(section);
403 assert(lvalue);
404 assert(rvalue);
405 assert(data);
406
407 r = prefix_new_static(network, filename, section_line, &p);
408 if (r < 0)
409 return log_oom();
410
411 r = safe_atou32(rvalue, &p->route_metric);
412 if (r < 0) {
413 log_syntax(unit, LOG_WARNING, filename, line, r,
414 "Failed to parse %s=, ignoring assignment: %s",
415 lvalue, rvalue);
416 return 0;
417 }
418
419 TAKE_PTR(p);
420
421 return 0;
422}
423
a8d4a210
YW		 424int config_parse_route_prefix(
425 const char *unit,
426 const char *filename,
427 unsigned line,
428 const char *section,
429 unsigned section_line,
430 const char *lvalue,
431 int ltype,
432 const char *rvalue,
433 void *data,
434 void *userdata) {
203d4df5
SS		 435
436 Network *network = userdata;
95081e08 437 _cleanup_(route_prefix_free_or_set_invalidp) RoutePrefix *p = NULL;
203d4df5
SS		 438 uint8_t prefixlen = 64;
439 union in_addr_union in6addr;
440 int r;
441
442 assert(filename);
443 assert(section);
444 assert(lvalue);
445 assert(rvalue);
446 assert(data);
447
448 r = route_prefix_new_static(network, filename, section_line, &p);
449 if (r < 0)
d96edb2c 450 return log_oom();
203d4df5
SS		 451
452 r = in_addr_prefix_from_string(rvalue, AF_INET6, &in6addr, &prefixlen);
453 if (r < 0) {
d96edb2c 454 log_syntax(unit, LOG_WARNING, filename, line, r, "Route prefix is invalid, ignoring assignment: %s", rvalue);
203d4df5
SS		 455 return 0;
456 }
457
c9778516
YW		 458 r = sd_radv_prefix_set_route_prefix(p->radv_route_prefix, &in6addr.in6, prefixlen);
459 if (r < 0) {
460 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to set route prefix, ignoring assignment: %m");
461 return 0;
462 }
203d4df5
SS		 463
464 p = NULL;
465
466 return 0;
467}
468
a8d4a210
YW		 469int config_parse_route_prefix_lifetime(
470 const char *unit,
471 const char *filename,
472 unsigned line,
473 const char *section,
474 unsigned section_line,
475 const char *lvalue,
476 int ltype,
477 const char *rvalue,
478 void *data,
479 void *userdata) {
480
203d4df5 481 Network *network = userdata;
95081e08 482 _cleanup_(route_prefix_free_or_set_invalidp) RoutePrefix *p = NULL;
203d4df5
SS		 483 usec_t usec;
484 int r;
485
486 assert(filename);
487 assert(section);
488 assert(lvalue);
489 assert(rvalue);
490 assert(data);
491
492 r = route_prefix_new_static(network, filename, section_line, &p);
493 if (r < 0)
d96edb2c 494 return log_oom();
203d4df5
SS		 495
496 r = parse_sec(rvalue, &usec);
497 if (r < 0) {
d96edb2c 498 log_syntax(unit, LOG_WARNING, filename, line, r,
095b3a7d 499 "Route lifetime is invalid, ignoring assignment: %s", rvalue);
203d4df5
SS		 500 return 0;
501 }
502
503 /* a value of 0xffffffff represents infinity */
504 r = sd_radv_route_prefix_set_lifetime(p->radv_route_prefix, DIV_ROUND_UP(usec, USEC_PER_SEC));
c9778516
YW		 505 if (r < 0) {
506 log_syntax(unit, LOG_WARNING, filename, line, r,
507 "Failed to set route lifetime, ignoring assignment: %m");
508 return 0;
509 }
203d4df5
SS		 510
511 p = NULL;
512
513 return 0;
514}
515
be023c67 516static int network_get_ipv6_dns(Network *network, struct in6_addr **ret_addresses, size_t *ret_size) {
c555a358 517 _cleanup_free_ struct in6_addr *addresses = NULL;
319a4f4b 518 size_t n_addresses = 0;
c555a358
PF		 519
520 assert(network);
be023c67
YW		 521 assert(ret_addresses);
522 assert(ret_size);
c555a358 523
be023c67 524 for (size_t i = 0; i < network->n_dns; i++) {
c555a358
PF		 525 union in_addr_union *addr;
526
e77bd3fd 527 if (network->dns[i]->family != AF_INET6)
c555a358
PF		 528 continue;
529
e77bd3fd 530 addr = &network->dns[i]->address;
c555a358
PF		 531
532 if (in_addr_is_null(AF_INET6, addr) ||
533 in_addr_is_link_local(AF_INET6, addr) ||
534 in_addr_is_localhost(AF_INET6, addr))
535 continue;
536
319a4f4b 537 if (!GREEDY_REALLOC(addresses, n_addresses + 1))
c555a358
PF		 538 return -ENOMEM;
539
540 addresses[n_addresses++] = addr->in6;
541 }
542
be023c67
YW		 543 *ret_addresses = TAKE_PTR(addresses);
544 *ret_size = n_addresses;
c555a358
PF		 545
546 return n_addresses;
547}
548
549static int radv_set_dns(Link *link, Link *uplink) {
550 _cleanup_free_ struct in6_addr *dns = NULL;
c555a358 551 usec_t lifetime_usec;
fd3ef936 552 size_t n_dns;
c555a358
PF		 553 int r;
554
555 if (!link->network->router_emit_dns)
556 return 0;
557
558 if (link->network->router_dns) {
fd3ef936
YW		 559 struct in6_addr *p;
560
561 dns = new(struct in6_addr, link->network->n_router_dns);
4e361acc 562 if (!dns)
c555a358
PF		 563 return -ENOMEM;
564
fd3ef936
YW		 565 p = dns;
566 for (size_t i = 0; i < link->network->n_router_dns; i++)
94876904
YW		 567 if (in6_addr_is_null(&link->network->router_dns[i])) {
568 if (in6_addr_is_set(&link->ipv6ll_address))
fd3ef936
YW		 569 *(p++) = link->ipv6ll_address;
570 } else
571 *(p++) = link->network->router_dns[i];
572
573 n_dns = p - dns;
c555a358
PF		 574 lifetime_usec = link->network->router_dns_lifetime_usec;
575
576 goto set_dns;
577 }
578
579 lifetime_usec = SD_RADV_DEFAULT_DNS_LIFETIME_USEC;
580
be023c67 581 r = network_get_ipv6_dns(link->network, &dns, &n_dns);
c555a358
PF		 582 if (r > 0)
583 goto set_dns;
584
585 if (uplink) {
4e361acc 586 if (!uplink->network) {
349a981d
PF		 587 log_link_debug(uplink, "Cannot fetch DNS servers as uplink interface is not managed by us");
588 return 0;
589 }
590
be023c67 591 r = network_get_ipv6_dns(uplink->network, &dns, &n_dns);
c555a358
PF		 592 if (r > 0)
593 goto set_dns;
594 }
595
596 return 0;
597
598 set_dns:
599 return sd_radv_set_rdnss(link->radv,
600 DIV_ROUND_UP(lifetime_usec, USEC_PER_SEC),
601 dns, n_dns);
602}
603
604static int radv_set_domains(Link *link, Link *uplink) {
5e2a51d5 605 OrderedSet *search_domains;
c555a358 606 usec_t lifetime_usec;
5e2a51d5 607 _cleanup_free_ char **s = NULL; /* just free() because the strings are owned by the set */
c555a358
PF		 608
609 if (!link->network->router_emit_domains)
610 return 0;
611
612 search_domains = link->network->router_search_domains;
613 lifetime_usec = link->network->router_dns_lifetime_usec;
614
615 if (search_domains)
616 goto set_domains;
617
618 lifetime_usec = SD_RADV_DEFAULT_DNS_LIFETIME_USEC;
619
620 search_domains = link->network->search_domains;
621 if (search_domains)
622 goto set_domains;
623
624 if (uplink) {
4e361acc 625 if (!uplink->network) {
349a981d
PF		 626 log_link_debug(uplink, "Cannot fetch DNS search domains as uplink interface is not managed by us");
627 return 0;
628 }
629
c555a358
PF		 630 search_domains = uplink->network->search_domains;
631 if (search_domains)
632 goto set_domains;
633 }
634
635 return 0;
636
637 set_domains:
5e2a51d5
ZJS		 638 s = ordered_set_get_strv(search_domains);
639 if (!s)
640 return log_oom();
641
c555a358
PF		 642 return sd_radv_set_dnssl(link->radv,
643 DIV_ROUND_UP(lifetime_usec, USEC_PER_SEC),
5e2a51d5 644 s);
c555a358
PF		 645
646}
647
648int radv_emit_dns(Link *link) {
fb3aec45 649 Link *uplink = NULL;
c555a358
PF		 650 int r;
651
fb3aec45 652 (void) manager_find_uplink(link->manager, AF_INET6, link, &uplink);
c555a358
PF		 653
654 r = radv_set_dns(link, uplink);
655 if (r < 0)
656 log_link_warning_errno(link, r, "Could not set RA DNS: %m");
657
658 r = radv_set_domains(link, uplink);
659 if (r < 0)
660 log_link_warning_errno(link, r, "Could not set RA Domains: %m");
661
662 return 0;
663}
664
086b8853
YW		 665static bool link_radv_enabled(Link *link) {
666 assert(link);
667
668 if (!link_ipv6ll_enabled(link))
669 return false;
670
e502f94d 671 return link->network->router_prefix_delegation;
086b8853
YW		 672}
673
091214b6 674int radv_configure(Link *link) {
2075e596 675 uint16_t router_lifetime;
8a08bbfc
YW		 676 RoutePrefix *q;
677 Prefix *p;
95081e08 678 int r;
091214b6
PF		 679
680 assert(link);
681 assert(link->network);
682
086b8853
YW		 683 if (!link_radv_enabled(link))
684 return 0;
685
bc9e40c9
YW		 686 if (link->radv)
687 return -EBUSY;
688
091214b6
PF		 689 r = sd_radv_new(&link->radv);
690 if (r < 0)
691 return r;
692
4cf85000 693 r = sd_radv_attach_event(link->radv, link->manager->event, 0);
091214b6
PF		 694 if (r < 0)
695 return r;
696
ca2b7cd8 697 r = sd_radv_set_mac(link->radv, &link->hw_addr.ether);
091214b6
PF		 698 if (r < 0)
699 return r;
700
701 r = sd_radv_set_ifindex(link->radv, link->ifindex);
702 if (r < 0)
703 return r;
704
705 r = sd_radv_set_managed_information(link->radv, link->network->router_managed);
706 if (r < 0)
707 return r;
708
709 r = sd_radv_set_other_information(link->radv, link->network->router_other_information);
710 if (r < 0)
711 return r;
712
2075e596
YW		 713 /* a value of UINT16_MAX represents infinity, 0x0 means this host is not a router */
714 if (link->network->router_lifetime_usec == USEC_INFINITY)
715 router_lifetime = UINT16_MAX;
716 else if (link->network->router_lifetime_usec > (UINT16_MAX - 1) * USEC_PER_SEC)
717 router_lifetime = UINT16_MAX - 1;
718 else
719 router_lifetime = DIV_ROUND_UP(link->network->router_lifetime_usec, USEC_PER_SEC);
720
721 r = sd_radv_set_router_lifetime(link->radv, router_lifetime);
091214b6
PF		 722 if (r < 0)
723 return r;
724
2075e596
YW		 725 if (router_lifetime > 0) {
726 r = sd_radv_set_preference(link->radv, link->network->router_preference);
091214b6
PF		 727 if (r < 0)
728 return r;
729 }
730
8a08bbfc
YW		 731 HASHMAP_FOREACH(p, link->network->prefixes_by_section) {
732 r = sd_radv_add_prefix(link->radv, p->radv_prefix, false);
733 if (r == -EEXIST)
734 continue;
735 if (r == -ENOEXEC) {
736 log_link_warning_errno(link, r, "[IPv6Prefix] section configured without Prefix= setting, ignoring section.");
737 continue;
56a23cb4 738 }
8a08bbfc
YW		 739 if (r < 0)
740 return r;
741 }
203d4df5 742
8a08bbfc
YW		 743 HASHMAP_FOREACH(q, link->network->route_prefixes_by_section) {
744 r = sd_radv_add_route_prefix(link->radv, q->radv_route_prefix, false);
745 if (r == -EEXIST)
746 continue;
747 if (r < 0)
748 return r;
091214b6
PF		 749 }
750
fd3ef936 751 return 0;
091214b6 752}
ca5ad760 753
be9363cc
YW		 754int radv_update_mac(Link *link) {
755 bool restart;
756 int r;
757
758 assert(link);
759
760 if (!link->radv)
761 return 0;
762
763 restart = sd_radv_is_running(link->radv);
764
a391901e
YW		 765 r = sd_radv_stop(link->radv);
766 if (r < 0)
767 return r;
be9363cc 768
ca2b7cd8 769 r = sd_radv_set_mac(link->radv, &link->hw_addr.ether);
be9363cc
YW		 770 if (r < 0)
771 return r;
772
773 if (restart) {
774 r = sd_radv_start(link->radv);
775 if (r < 0)
776 return r;
777 }
778
779 return 0;
780}
781
a8d4a210
YW		 782int radv_add_prefix(
783 Link *link,
784 const struct in6_addr *prefix,
785 uint8_t prefix_len,
786 uint32_t lifetime_preferred,
787 uint32_t lifetime_valid) {
788
1d596fde
YW		 789 _cleanup_(sd_radv_prefix_unrefp) sd_radv_prefix *p = NULL;
790 int r;
791
792 assert(link);
85b6a811
YW		 793
794 if (!link->radv)
795 return 0;
1d596fde
YW		 796
797 r = sd_radv_prefix_new(&p);
798 if (r < 0)
799 return r;
800
801 r = sd_radv_prefix_set_prefix(p, prefix, prefix_len);
802 if (r < 0)
803 return r;
804
805 r = sd_radv_prefix_set_preferred_lifetime(p, lifetime_preferred);
806 if (r < 0)
807 return r;
808
809 r = sd_radv_prefix_set_valid_lifetime(p, lifetime_valid);
810 if (r < 0)
811 return r;
812
813 r = sd_radv_add_prefix(link->radv, p, true);
814 if (r < 0 && r != -EEXIST)
815 return r;
816
817 return 0;
818}
819
ca5ad760
YW		 820int config_parse_radv_dns(
821 const char *unit,
822 const char *filename,
823 unsigned line,
824 const char *section,
825 unsigned section_line,
826 const char *lvalue,
827 int ltype,
828 const char *rvalue,
829 void *data,
830 void *userdata) {
831
832 Network *n = data;
ca5ad760
YW		 833 int r;
834
835 assert(filename);
836 assert(lvalue);
837 assert(rvalue);
838
a3c1a949
YW		 839 if (isempty(rvalue)) {
840 n->n_router_dns = 0;
841 n->router_dns = mfree(n->router_dns);
842 return 0;
843 }
844
d96edb2c 845 for (const char *p = rvalue;;) {
ca5ad760
YW		 846 _cleanup_free_ char *w = NULL;
847 union in_addr_union a;
848
849 r = extract_first_word(&p, &w, NULL, 0);
850 if (r == -ENOMEM)
851 return log_oom();
852 if (r < 0) {
d96edb2c 853 log_syntax(unit, LOG_WARNING, filename, line, r,
ca5ad760
YW		 854 "Failed to extract word, ignoring: %s", rvalue);
855 return 0;
856 }
857 if (r == 0)
d96edb2c 858 return 0;
ca5ad760 859
fd3ef936
YW		 860 if (streq(w, "_link_local"))
861 a = IN_ADDR_NULL;
862 else {
863 r = in_addr_from_string(AF_INET6, w, &a);
864 if (r < 0) {
d96edb2c 865 log_syntax(unit, LOG_WARNING, filename, line, r,
fd3ef936
YW		 866 "Failed to parse DNS server address, ignoring: %s", w);
867 continue;
868 }
ca5ad760 869
fd3ef936 870 if (in_addr_is_null(AF_INET6, &a)) {
d96edb2c 871 log_syntax(unit, LOG_WARNING, filename, line, 0,
fd3ef936
YW		 872 "DNS server address is null, ignoring: %s", w);
873 continue;
874 }
875 }
ca5ad760 876
fd3ef936
YW		 877 struct in6_addr *m;
878 m = reallocarray(n->router_dns, n->n_router_dns + 1, sizeof(struct in6_addr));
879 if (!m)
880 return log_oom();
ca5ad760 881
fd3ef936
YW		 882 m[n->n_router_dns++] = a.in6;
883 n->router_dns = m;
ca5ad760 884 }
ca5ad760
YW		 885}
886
887int config_parse_radv_search_domains(
888 const char *unit,
889 const char *filename,
890 unsigned line,
891 const char *section,
892 unsigned section_line,
893 const char *lvalue,
894 int ltype,
895 const char *rvalue,
896 void *data,
897 void *userdata) {
898
899 Network *n = data;
ca5ad760
YW		 900 int r;
901
902 assert(filename);
903 assert(lvalue);
904 assert(rvalue);
905
a3c1a949
YW		 906 if (isempty(rvalue)) {
907 n->router_search_domains = ordered_set_free(n->router_search_domains);
908 return 0;
909 }
910
d96edb2c 911 for (const char *p = rvalue;;) {
ca5ad760
YW		 912 _cleanup_free_ char *w = NULL, *idna = NULL;
913
914 r = extract_first_word(&p, &w, NULL, 0);
915 if (r == -ENOMEM)
916 return log_oom();
917 if (r < 0) {
d96edb2c 918 log_syntax(unit, LOG_WARNING, filename, line, r,
ca5ad760
YW		 919 "Failed to extract word, ignoring: %s", rvalue);
920 return 0;
921 }
922 if (r == 0)
d96edb2c 923 return 0;
ca5ad760
YW		 924
925 r = dns_name_apply_idna(w, &idna);
926 if (r < 0) {
d96edb2c 927 log_syntax(unit, LOG_WARNING, filename, line, r,
ca5ad760
YW		 928 "Failed to apply IDNA to domain name '%s', ignoring: %m", w);
929 continue;
930 } else if (r == 0)
931 /* transfer ownership to simplify subsequent operations */
932 idna = TAKE_PTR(w);
933
5e276772 934 r = ordered_set_ensure_allocated(&n->router_search_domains, &string_hash_ops_free);
ca5ad760 935 if (r < 0)
d96edb2c 936 return log_oom();
ca5ad760
YW		 937
938 r = ordered_set_consume(n->router_search_domains, TAKE_PTR(idna));
939 if (r < 0)
d96edb2c 940 return log_oom();
ca5ad760 941 }
ca5ad760
YW		 942}
943
944static const char * const radv_prefix_delegation_table[_RADV_PREFIX_DELEGATION_MAX] = {
a8d4a210 945 [RADV_PREFIX_DELEGATION_NONE] = "no",
ca5ad760 946 [RADV_PREFIX_DELEGATION_STATIC] = "static",
a8d4a210
YW		 947 [RADV_PREFIX_DELEGATION_DHCP6] = "dhcpv6",
948 [RADV_PREFIX_DELEGATION_BOTH] = "yes",
ca5ad760
YW		 949};
950
951DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(
952 radv_prefix_delegation,
953 RADVPrefixDelegation,
954 RADV_PREFIX_DELEGATION_BOTH);
955
27ff0490
YW		 956int config_parse_router_prefix_delegation(
957 const char *unit,
958 const char *filename,
959 unsigned line,
960 const char *section,
961 unsigned section_line,
962 const char *lvalue,
963 int ltype,
964 const char *rvalue,
965 void *data,
966 void *userdata) {
967
968 RADVPrefixDelegation val, *ra = data;
969 int r;
970
971 assert(filename);
972 assert(lvalue);
973 assert(rvalue);
974 assert(data);
975
976 if (streq(lvalue, "IPv6SendRA")) {
977 r = parse_boolean(rvalue);
978 if (r < 0) {
979 log_syntax(unit, LOG_WARNING, filename, line, r,
980 "Invalid %s= setting, ignoring assignment: %s", lvalue, rvalue);
981 return 0;
982 }
983
984 /* When IPv6SendRA= is enabled, only static prefixes are sent by default, and users
985 * need to explicitly enable DHCPv6PrefixDelegation=. */
986 *ra = r ? RADV_PREFIX_DELEGATION_STATIC : RADV_PREFIX_DELEGATION_NONE;
987 return 0;
988 }
989
990 /* For backward compatibility */
991 val = radv_prefix_delegation_from_string(rvalue);
992 if (val < 0) {
b98680b2 993 log_syntax(unit, LOG_WARNING, filename, line, val,
27ff0490
YW		 994 "Invalid %s= setting, ignoring assignment: %s", lvalue, rvalue);
995 return 0;
996 }
997
998 *ra = val;
999 return 0;
1000}
a8d4a210
YW		 1001
1002int config_parse_router_preference(
1003 const char *unit,
1004 const char *filename,
1005 unsigned line,
1006 const char *section,
1007 unsigned section_line,
1008 const char *lvalue,
1009 int ltype,
1010 const char *rvalue,
1011 void *data,
1012 void *userdata) {
1013
ca5ad760
YW		 1014 Network *network = userdata;
1015
1016 assert(filename);
1017 assert(section);
1018 assert(lvalue);
1019 assert(rvalue);
1020 assert(data);
1021
1022 if (streq(rvalue, "high"))
1023 network->router_preference = SD_NDISC_PREFERENCE_HIGH;
1024 else if (STR_IN_SET(rvalue, "medium", "normal", "default"))
1025 network->router_preference = SD_NDISC_PREFERENCE_MEDIUM;
1026 else if (streq(rvalue, "low"))
1027 network->router_preference = SD_NDISC_PREFERENCE_LOW;
1028 else
d96edb2c
YW		 1029 log_syntax(unit, LOG_WARNING, filename, line, 0,
1030 "Invalid router preference, ignoring assignment: %s", rvalue);
ca5ad760
YW		 1031
1032 return 0;
1033}
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