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1 | /*** | |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2016 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
20 | #include "alloc-util.h" | |
21 | #include "bus-common-errors.h" | |
22 | #include "bus-util.h" | |
23 | #include "parse-util.h" | |
24 | #include "resolve-util.h" | |
25 | #include "resolved-bus.h" | |
26 | #include "resolved-link-bus.h" | |
27 | #include "resolved-resolv-conf.h" | |
28 | #include "strv.h" | |
29 | ||
30 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_resolve_support, resolve_support, ResolveSupport); | |
31 | ||
32 | static int property_get_dnssec_mode( | |
33 | sd_bus *bus, | |
34 | const char *path, | |
35 | const char *interface, | |
36 | const char *property, | |
37 | sd_bus_message *reply, | |
38 | void *userdata, | |
39 | sd_bus_error *error) { | |
40 | ||
41 | Link *l = userdata; | |
42 | ||
43 | assert(reply); | |
44 | assert(l); | |
45 | ||
46 | return sd_bus_message_append(reply, "s", dnssec_mode_to_string(link_get_dnssec_mode(l))); | |
47 | } | |
48 | ||
49 | static int property_get_dns( | |
50 | sd_bus *bus, | |
51 | const char *path, | |
52 | const char *interface, | |
53 | const char *property, | |
54 | sd_bus_message *reply, | |
55 | void *userdata, | |
56 | sd_bus_error *error) { | |
57 | ||
58 | Link *l = userdata; | |
59 | DnsServer *s; | |
60 | int r; | |
61 | ||
62 | assert(reply); | |
63 | assert(l); | |
64 | ||
65 | r = sd_bus_message_open_container(reply, 'a', "(iay)"); | |
66 | if (r < 0) | |
67 | return r; | |
68 | ||
69 | LIST_FOREACH(servers, s, l->dns_servers) { | |
70 | r = bus_dns_server_append(reply, s, false); | |
71 | if (r < 0) | |
72 | return r; | |
73 | } | |
74 | ||
75 | return sd_bus_message_close_container(reply); | |
76 | } | |
77 | ||
78 | static int property_get_domains( | |
79 | sd_bus *bus, | |
80 | const char *path, | |
81 | const char *interface, | |
82 | const char *property, | |
83 | sd_bus_message *reply, | |
84 | void *userdata, | |
85 | sd_bus_error *error) { | |
86 | ||
87 | Link *l = userdata; | |
88 | DnsSearchDomain *d; | |
89 | int r; | |
90 | ||
91 | assert(reply); | |
92 | assert(l); | |
93 | ||
94 | r = sd_bus_message_open_container(reply, 'a', "(sb)"); | |
95 | if (r < 0) | |
96 | return r; | |
97 | ||
98 | LIST_FOREACH(domains, d, l->search_domains) { | |
99 | r = sd_bus_message_append(reply, "(sb)", d->name, d->route_only); | |
100 | if (r < 0) | |
101 | return r; | |
102 | } | |
103 | ||
104 | return sd_bus_message_close_container(reply); | |
105 | } | |
106 | ||
107 | static int property_get_scopes_mask( | |
108 | sd_bus *bus, | |
109 | const char *path, | |
110 | const char *interface, | |
111 | const char *property, | |
112 | sd_bus_message *reply, | |
113 | void *userdata, | |
114 | sd_bus_error *error) { | |
115 | ||
116 | Link *l = userdata; | |
117 | uint64_t mask; | |
118 | ||
119 | assert(reply); | |
120 | assert(l); | |
121 | ||
122 | mask = (l->unicast_scope ? SD_RESOLVED_DNS : 0) | | |
123 | (l->llmnr_ipv4_scope ? SD_RESOLVED_LLMNR_IPV4 : 0) | | |
124 | (l->llmnr_ipv6_scope ? SD_RESOLVED_LLMNR_IPV6 : 0) | | |
125 | (l->mdns_ipv4_scope ? SD_RESOLVED_MDNS_IPV4 : 0) | | |
126 | (l->mdns_ipv6_scope ? SD_RESOLVED_MDNS_IPV6 : 0); | |
127 | ||
128 | return sd_bus_message_append(reply, "t", mask); | |
129 | } | |
130 | ||
131 | static int property_get_ntas( | |
132 | sd_bus *bus, | |
133 | const char *path, | |
134 | const char *interface, | |
135 | const char *property, | |
136 | sd_bus_message *reply, | |
137 | void *userdata, | |
138 | sd_bus_error *error) { | |
139 | ||
140 | Link *l = userdata; | |
141 | const char *name; | |
142 | Iterator i; | |
143 | int r; | |
144 | ||
145 | assert(reply); | |
146 | assert(l); | |
147 | ||
148 | r = sd_bus_message_open_container(reply, 'a', "s"); | |
149 | if (r < 0) | |
150 | return r; | |
151 | ||
152 | SET_FOREACH(name, l->dnssec_negative_trust_anchors, i) { | |
153 | r = sd_bus_message_append(reply, "s", name); | |
154 | if (r < 0) | |
155 | return r; | |
156 | } | |
157 | ||
158 | return sd_bus_message_close_container(reply); | |
159 | } | |
160 | ||
161 | static int property_get_dnssec_supported( | |
162 | sd_bus *bus, | |
163 | const char *path, | |
164 | const char *interface, | |
165 | const char *property, | |
166 | sd_bus_message *reply, | |
167 | void *userdata, | |
168 | sd_bus_error *error) { | |
169 | ||
170 | Link *l = userdata; | |
171 | ||
172 | assert(reply); | |
173 | assert(l); | |
174 | ||
175 | return sd_bus_message_append(reply, "b", link_dnssec_supported(l)); | |
176 | } | |
177 | ||
178 | static int verify_unmanaged_link(Link *l, sd_bus_error *error) { | |
179 | assert(l); | |
180 | ||
181 | if (l->flags & IFF_LOOPBACK) | |
182 | return sd_bus_error_setf(error, BUS_ERROR_LINK_BUSY, "Link %s is loopback device.", l->name); | |
183 | if (l->is_managed) | |
184 | return sd_bus_error_setf(error, BUS_ERROR_LINK_BUSY, "Link %s is managed.", l->name); | |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
189 | int bus_link_method_set_dns_servers(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
190 | _cleanup_free_ struct in_addr_data *dns = NULL; | |
191 | size_t allocated = 0, n = 0; | |
192 | Link *l = userdata; | |
193 | unsigned i; | |
194 | int r; | |
195 | ||
196 | assert(message); | |
197 | assert(l); | |
198 | ||
199 | r = verify_unmanaged_link(l, error); | |
200 | if (r < 0) | |
201 | return r; | |
202 | ||
203 | r = sd_bus_message_enter_container(message, 'a', "(iay)"); | |
204 | if (r < 0) | |
205 | return r; | |
206 | ||
207 | for (;;) { | |
208 | int family; | |
209 | size_t sz; | |
210 | const void *d; | |
211 | ||
212 | assert_cc(sizeof(int) == sizeof(int32_t)); | |
213 | ||
214 | r = sd_bus_message_enter_container(message, 'r', "iay"); | |
215 | if (r < 0) | |
216 | return r; | |
217 | if (r == 0) | |
218 | break; | |
219 | ||
220 | r = sd_bus_message_read(message, "i", &family); | |
221 | if (r < 0) | |
222 | return r; | |
223 | ||
224 | if (!IN_SET(family, AF_INET, AF_INET6)) | |
225 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family); | |
226 | ||
227 | r = sd_bus_message_read_array(message, 'y', &d, &sz); | |
228 | if (r < 0) | |
229 | return r; | |
230 | if (sz != FAMILY_ADDRESS_SIZE(family)) | |
231 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid address size"); | |
232 | ||
233 | if (!dns_server_address_valid(family, d)) | |
234 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid DNS server address"); | |
235 | ||
236 | r = sd_bus_message_exit_container(message); | |
237 | if (r < 0) | |
238 | return r; | |
239 | ||
240 | if (!GREEDY_REALLOC(dns, allocated, n+1)) | |
241 | return -ENOMEM; | |
242 | ||
243 | dns[n].family = family; | |
244 | memcpy(&dns[n].address, d, sz); | |
245 | n++; | |
246 | } | |
247 | ||
248 | r = sd_bus_message_exit_container(message); | |
249 | if (r < 0) | |
250 | return r; | |
251 | ||
252 | dns_server_mark_all(l->dns_servers); | |
253 | ||
254 | for (i = 0; i < n; i++) { | |
255 | DnsServer *s; | |
256 | ||
257 | s = dns_server_find(l->dns_servers, dns[i].family, &dns[i].address, 0); | |
258 | if (s) | |
259 | dns_server_move_back_and_unmark(s); | |
260 | else { | |
261 | r = dns_server_new(l->manager, NULL, DNS_SERVER_LINK, l, dns[i].family, &dns[i].address, 0); | |
262 | if (r < 0) | |
263 | goto clear; | |
264 | } | |
265 | ||
266 | } | |
267 | ||
268 | dns_server_unlink_marked(l->dns_servers); | |
269 | link_allocate_scopes(l); | |
270 | ||
271 | (void) link_save_user(l); | |
272 | (void) manager_write_resolv_conf(l->manager); | |
273 | ||
274 | return sd_bus_reply_method_return(message, NULL); | |
275 | ||
276 | clear: | |
277 | dns_server_unlink_all(l->dns_servers); | |
278 | return r; | |
279 | } | |
280 | ||
281 | int bus_link_method_set_domains(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
282 | Link *l = userdata; | |
283 | int r; | |
284 | ||
285 | assert(message); | |
286 | assert(l); | |
287 | ||
288 | r = verify_unmanaged_link(l, error); | |
289 | if (r < 0) | |
290 | return r; | |
291 | ||
292 | r = sd_bus_message_enter_container(message, 'a', "(sb)"); | |
293 | if (r < 0) | |
294 | return r; | |
295 | ||
296 | for (;;) { | |
297 | const char *name; | |
298 | int route_only; | |
299 | ||
300 | r = sd_bus_message_read(message, "(sb)", &name, &route_only); | |
301 | if (r < 0) | |
302 | return r; | |
303 | if (r == 0) | |
304 | break; | |
305 | ||
306 | r = dns_name_is_valid(name); | |
307 | if (r < 0) | |
308 | return r; | |
309 | if (r == 0) | |
310 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid search domain %s", name); | |
311 | if (!route_only && dns_name_is_root(name)) | |
312 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Root domain is not suitable as search domain"); | |
313 | } | |
314 | ||
315 | dns_search_domain_mark_all(l->search_domains); | |
316 | ||
317 | r = sd_bus_message_rewind(message, false); | |
318 | if (r < 0) | |
319 | return r; | |
320 | ||
321 | for (;;) { | |
322 | DnsSearchDomain *d; | |
323 | const char *name; | |
324 | int route_only; | |
325 | ||
326 | r = sd_bus_message_read(message, "(sb)", &name, &route_only); | |
327 | if (r < 0) | |
328 | goto clear; | |
329 | if (r == 0) | |
330 | break; | |
331 | ||
332 | r = dns_search_domain_find(l->search_domains, name, &d); | |
333 | if (r < 0) | |
334 | goto clear; | |
335 | ||
336 | if (r > 0) | |
337 | dns_search_domain_move_back_and_unmark(d); | |
338 | else { | |
339 | r = dns_search_domain_new(l->manager, &d, DNS_SEARCH_DOMAIN_LINK, l, name); | |
340 | if (r < 0) | |
341 | goto clear; | |
342 | } | |
343 | ||
344 | d->route_only = route_only; | |
345 | } | |
346 | ||
347 | r = sd_bus_message_exit_container(message); | |
348 | if (r < 0) | |
349 | goto clear; | |
350 | ||
351 | dns_search_domain_unlink_marked(l->search_domains); | |
352 | ||
353 | (void) link_save_user(l); | |
354 | (void) manager_write_resolv_conf(l->manager); | |
355 | ||
356 | return sd_bus_reply_method_return(message, NULL); | |
357 | ||
358 | clear: | |
359 | dns_search_domain_unlink_all(l->search_domains); | |
360 | return r; | |
361 | } | |
362 | ||
363 | int bus_link_method_set_llmnr(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
364 | Link *l = userdata; | |
365 | ResolveSupport mode; | |
366 | const char *llmnr; | |
367 | int r; | |
368 | ||
369 | assert(message); | |
370 | assert(l); | |
371 | ||
372 | r = verify_unmanaged_link(l, error); | |
373 | if (r < 0) | |
374 | return r; | |
375 | ||
376 | r = sd_bus_message_read(message, "s", &llmnr); | |
377 | if (r < 0) | |
378 | return r; | |
379 | ||
380 | if (isempty(llmnr)) | |
381 | mode = RESOLVE_SUPPORT_YES; | |
382 | else { | |
383 | mode = resolve_support_from_string(llmnr); | |
384 | if (mode < 0) | |
385 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid LLMNR setting: %s", llmnr); | |
386 | } | |
387 | ||
388 | l->llmnr_support = mode; | |
389 | link_allocate_scopes(l); | |
390 | link_add_rrs(l, false); | |
391 | ||
392 | (void) link_save_user(l); | |
393 | ||
394 | return sd_bus_reply_method_return(message, NULL); | |
395 | } | |
396 | ||
397 | int bus_link_method_set_mdns(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
398 | Link *l = userdata; | |
399 | ResolveSupport mode; | |
400 | const char *mdns; | |
401 | int r; | |
402 | ||
403 | assert(message); | |
404 | assert(l); | |
405 | ||
406 | r = verify_unmanaged_link(l, error); | |
407 | if (r < 0) | |
408 | return r; | |
409 | ||
410 | r = sd_bus_message_read(message, "s", &mdns); | |
411 | if (r < 0) | |
412 | return r; | |
413 | ||
414 | if (isempty(mdns)) | |
415 | mode = RESOLVE_SUPPORT_NO; | |
416 | else { | |
417 | mode = resolve_support_from_string(mdns); | |
418 | if (mode < 0) | |
419 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid MulticastDNS setting: %s", mdns); | |
420 | } | |
421 | ||
422 | l->mdns_support = mode; | |
423 | link_allocate_scopes(l); | |
424 | link_add_rrs(l, false); | |
425 | ||
426 | (void) link_save_user(l); | |
427 | ||
428 | return sd_bus_reply_method_return(message, NULL); | |
429 | } | |
430 | ||
431 | int bus_link_method_set_dnssec(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
432 | Link *l = userdata; | |
433 | const char *dnssec; | |
434 | DnssecMode mode; | |
435 | int r; | |
436 | ||
437 | assert(message); | |
438 | assert(l); | |
439 | ||
440 | r = verify_unmanaged_link(l, error); | |
441 | if (r < 0) | |
442 | return r; | |
443 | ||
444 | r = sd_bus_message_read(message, "s", &dnssec); | |
445 | if (r < 0) | |
446 | return r; | |
447 | ||
448 | if (isempty(dnssec)) | |
449 | mode = _DNSSEC_MODE_INVALID; | |
450 | else { | |
451 | mode = dnssec_mode_from_string(dnssec); | |
452 | if (mode < 0) | |
453 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid DNSSEC setting: %s", dnssec); | |
454 | } | |
455 | ||
456 | link_set_dnssec_mode(l, mode); | |
457 | ||
458 | (void) link_save_user(l); | |
459 | ||
460 | return sd_bus_reply_method_return(message, NULL); | |
461 | } | |
462 | ||
463 | int bus_link_method_set_dnssec_negative_trust_anchors(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
464 | _cleanup_set_free_free_ Set *ns = NULL; | |
465 | _cleanup_free_ char **ntas = NULL; | |
466 | Link *l = userdata; | |
467 | int r; | |
468 | char **i; | |
469 | ||
470 | assert(message); | |
471 | assert(l); | |
472 | ||
473 | r = verify_unmanaged_link(l, error); | |
474 | if (r < 0) | |
475 | return r; | |
476 | ||
477 | r = sd_bus_message_read_strv(message, &ntas); | |
478 | if (r < 0) | |
479 | return r; | |
480 | ||
481 | STRV_FOREACH(i, ntas) { | |
482 | r = dns_name_is_valid(*i); | |
483 | if (r < 0) | |
484 | return r; | |
485 | if (r == 0) | |
486 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid negative trust anchor domain: %s", *i); | |
487 | } | |
488 | ||
489 | ns = set_new(&dns_name_hash_ops); | |
490 | if (!ns) | |
491 | return -ENOMEM; | |
492 | ||
493 | STRV_FOREACH(i, ntas) { | |
494 | r = set_put_strdup(ns, *i); | |
495 | if (r < 0) | |
496 | return r; | |
497 | } | |
498 | ||
499 | set_free_free(l->dnssec_negative_trust_anchors); | |
500 | l->dnssec_negative_trust_anchors = ns; | |
501 | ns = NULL; | |
502 | ||
503 | (void) link_save_user(l); | |
504 | ||
505 | return sd_bus_reply_method_return(message, NULL); | |
506 | } | |
507 | ||
508 | int bus_link_method_revert(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
509 | Link *l = userdata; | |
510 | int r; | |
511 | ||
512 | assert(message); | |
513 | assert(l); | |
514 | ||
515 | r = verify_unmanaged_link(l, error); | |
516 | if (r < 0) | |
517 | return r; | |
518 | ||
519 | link_flush_settings(l); | |
520 | link_allocate_scopes(l); | |
521 | link_add_rrs(l, false); | |
522 | ||
523 | (void) link_save_user(l); | |
524 | (void) manager_write_resolv_conf(l->manager); | |
525 | ||
526 | return sd_bus_reply_method_return(message, NULL); | |
527 | } | |
528 | ||
529 | const sd_bus_vtable link_vtable[] = { | |
530 | SD_BUS_VTABLE_START(0), | |
531 | ||
532 | SD_BUS_PROPERTY("ScopesMask", "t", property_get_scopes_mask, 0, 0), | |
533 | SD_BUS_PROPERTY("DNS", "a(iay)", property_get_dns, 0, 0), | |
534 | SD_BUS_PROPERTY("Domains", "a(sb)", property_get_domains, 0, 0), | |
535 | SD_BUS_PROPERTY("LLMNR", "s", property_get_resolve_support, offsetof(Link, llmnr_support), 0), | |
536 | SD_BUS_PROPERTY("MulticastDNS", "s", property_get_resolve_support, offsetof(Link, mdns_support), 0), | |
537 | SD_BUS_PROPERTY("DNSSEC", "s", property_get_dnssec_mode, 0, 0), | |
538 | SD_BUS_PROPERTY("DNSSECNegativeTrustAnchors", "as", property_get_ntas, 0, 0), | |
539 | SD_BUS_PROPERTY("DNSSECSupported", "b", property_get_dnssec_supported, 0, 0), | |
540 | ||
541 | SD_BUS_METHOD("SetDNS", "a(iay)", NULL, bus_link_method_set_dns_servers, 0), | |
542 | SD_BUS_METHOD("SetDomains", "a(sb)", NULL, bus_link_method_set_domains, 0), | |
543 | SD_BUS_METHOD("SetLLMNR", "s", NULL, bus_link_method_set_llmnr, 0), | |
544 | SD_BUS_METHOD("SetMulticastDNS", "s", NULL, bus_link_method_set_mdns, 0), | |
545 | SD_BUS_METHOD("SetDNSSEC", "s", NULL, bus_link_method_set_dnssec, 0), | |
546 | SD_BUS_METHOD("SetDNSSECNegativeTrustAnchors", "as", NULL, bus_link_method_set_dnssec_negative_trust_anchors, 0), | |
547 | SD_BUS_METHOD("Revert", NULL, NULL, bus_link_method_revert, 0), | |
548 | ||
549 | SD_BUS_VTABLE_END | |
550 | }; | |
551 | ||
552 | int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { | |
553 | _cleanup_free_ char *e = NULL; | |
554 | Manager *m = userdata; | |
555 | int ifindex; | |
556 | Link *link; | |
557 | int r; | |
558 | ||
559 | assert(bus); | |
560 | assert(path); | |
561 | assert(interface); | |
562 | assert(found); | |
563 | assert(m); | |
564 | ||
565 | r = sd_bus_path_decode(path, "/org/freedesktop/resolve1/link", &e); | |
566 | if (r <= 0) | |
567 | return 0; | |
568 | ||
569 | r = parse_ifindex(e, &ifindex); | |
570 | if (r < 0) | |
571 | return 0; | |
572 | ||
573 | link = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
574 | if (!link) | |
575 | return 0; | |
576 | ||
577 | *found = link; | |
578 | return 1; | |
579 | } | |
580 | ||
581 | char *link_bus_path(Link *link) { | |
582 | _cleanup_free_ char *ifindex = NULL; | |
583 | char *p; | |
584 | int r; | |
585 | ||
586 | assert(link); | |
587 | ||
588 | if (asprintf(&ifindex, "%i", link->ifindex) < 0) | |
589 | return NULL; | |
590 | ||
591 | r = sd_bus_path_encode("/org/freedesktop/resolve1/link", ifindex, &p); | |
592 | if (r < 0) | |
593 | return NULL; | |
594 | ||
595 | return p; | |
596 | } | |
597 | ||
598 | int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { | |
599 | _cleanup_strv_free_ char **l = NULL; | |
600 | Manager *m = userdata; | |
601 | Link *link; | |
602 | Iterator i; | |
603 | unsigned c = 0; | |
604 | ||
605 | assert(bus); | |
606 | assert(path); | |
607 | assert(m); | |
608 | assert(nodes); | |
609 | ||
610 | l = new0(char*, hashmap_size(m->links) + 1); | |
611 | if (!l) | |
612 | return -ENOMEM; | |
613 | ||
614 | HASHMAP_FOREACH(link, m->links, i) { | |
615 | char *p; | |
616 | ||
617 | p = link_bus_path(link); | |
618 | if (!p) | |
619 | return -ENOMEM; | |
620 | ||
621 | l[c++] = p; | |
622 | } | |
623 | ||
624 | l[c] = NULL; | |
625 | *nodes = l; | |
626 | l = NULL; | |
627 | ||
628 | return 1; | |
629 | } |