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3abaabda LP |
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-util.h" | |
22 | #include "parse-util.h" | |
23 | #include "resolve-util.h" | |
24 | #include "resolved-bus.h" | |
25 | #include "resolved-link-bus.h" | |
26 | #include "strv.h" | |
27 | ||
28 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_resolve_support, resolve_support, ResolveSupport); | |
29 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_dnssec_mode, dnssec_mode, DnssecMode); | |
30 | ||
31 | static int property_get_dns( | |
32 | sd_bus *bus, | |
33 | const char *path, | |
34 | const char *interface, | |
35 | const char *property, | |
36 | sd_bus_message *reply, | |
37 | void *userdata, | |
38 | sd_bus_error *error) { | |
39 | ||
40 | Link *l = userdata; | |
41 | DnsServer *s; | |
42 | int r; | |
43 | ||
44 | assert(reply); | |
45 | assert(l); | |
46 | ||
47 | r = sd_bus_message_open_container(reply, 'a', "(iay)"); | |
48 | if (r < 0) | |
49 | return r; | |
50 | ||
51 | LIST_FOREACH(servers, s, l->dns_servers) { | |
52 | r = bus_dns_server_append(reply, s, false); | |
53 | if (r < 0) | |
54 | return r; | |
55 | } | |
56 | ||
57 | return sd_bus_message_close_container(reply); | |
58 | } | |
59 | ||
60 | static int property_get_domains( | |
61 | sd_bus *bus, | |
62 | const char *path, | |
63 | const char *interface, | |
64 | const char *property, | |
65 | sd_bus_message *reply, | |
66 | void *userdata, | |
67 | sd_bus_error *error) { | |
68 | ||
69 | Link *l = userdata; | |
70 | DnsSearchDomain *d; | |
71 | int r; | |
72 | ||
73 | assert(reply); | |
74 | assert(l); | |
75 | ||
ad44b56b | 76 | r = sd_bus_message_open_container(reply, 'a', "(sb)"); |
3abaabda LP |
77 | if (r < 0) |
78 | return r; | |
79 | ||
80 | LIST_FOREACH(domains, d, l->search_domains) { | |
ad44b56b | 81 | r = sd_bus_message_append(reply, "(sb)", d->name, d->route_only); |
3abaabda LP |
82 | if (r < 0) |
83 | return r; | |
84 | } | |
85 | ||
86 | return sd_bus_message_close_container(reply); | |
87 | } | |
88 | ||
89 | static int property_get_scopes_mask( | |
90 | sd_bus *bus, | |
91 | const char *path, | |
92 | const char *interface, | |
93 | const char *property, | |
94 | sd_bus_message *reply, | |
95 | void *userdata, | |
96 | sd_bus_error *error) { | |
97 | ||
98 | Link *l = userdata; | |
99 | uint64_t mask; | |
100 | ||
101 | assert(reply); | |
102 | assert(l); | |
103 | ||
104 | mask = (l->unicast_scope ? SD_RESOLVED_DNS : 0) | | |
105 | (l->llmnr_ipv4_scope ? SD_RESOLVED_LLMNR_IPV4 : 0) | | |
106 | (l->llmnr_ipv6_scope ? SD_RESOLVED_LLMNR_IPV6 : 0) | | |
107 | (l->mdns_ipv4_scope ? SD_RESOLVED_MDNS_IPV4 : 0) | | |
108 | (l->mdns_ipv6_scope ? SD_RESOLVED_MDNS_IPV6 : 0); | |
109 | ||
110 | return sd_bus_message_append(reply, "t", mask); | |
111 | } | |
112 | ||
113 | static int property_get_ntas( | |
114 | sd_bus *bus, | |
115 | const char *path, | |
116 | const char *interface, | |
117 | const char *property, | |
118 | sd_bus_message *reply, | |
119 | void *userdata, | |
120 | sd_bus_error *error) { | |
121 | ||
122 | Link *l = userdata; | |
123 | const char *name; | |
124 | Iterator i; | |
125 | int r; | |
126 | ||
127 | assert(reply); | |
128 | assert(l); | |
129 | ||
130 | r = sd_bus_message_open_container(reply, 'a', "s"); | |
131 | if (r < 0) | |
132 | return r; | |
133 | ||
134 | SET_FOREACH(name, l->dnssec_negative_trust_anchors, i) { | |
135 | r = sd_bus_message_append(reply, "s", name); | |
136 | if (r < 0) | |
137 | return r; | |
138 | } | |
139 | ||
140 | return sd_bus_message_close_container(reply); | |
141 | } | |
142 | ||
c69fa7e3 LP |
143 | static int property_get_dnssec_supported( |
144 | sd_bus *bus, | |
145 | const char *path, | |
146 | const char *interface, | |
147 | const char *property, | |
148 | sd_bus_message *reply, | |
149 | void *userdata, | |
150 | sd_bus_error *error) { | |
151 | ||
152 | Link *l = userdata; | |
153 | ||
154 | assert(reply); | |
155 | assert(l); | |
156 | ||
157 | return sd_bus_message_append(reply, "b", link_dnssec_supported(l)); | |
158 | } | |
159 | ||
d2ec6608 LP |
160 | int bus_link_method_set_dns_servers(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
161 | _cleanup_free_ struct in_addr_data *dns = NULL; | |
162 | size_t allocated = 0, n = 0; | |
163 | Link *l = userdata; | |
164 | unsigned i; | |
165 | int r; | |
166 | ||
167 | assert(message); | |
168 | assert(l); | |
169 | ||
170 | r = sd_bus_message_enter_container(message, 'a', "(iay)"); | |
171 | if (r < 0) | |
172 | return r; | |
173 | ||
174 | for (;;) { | |
175 | int family; | |
176 | size_t sz; | |
177 | const void *d; | |
178 | ||
179 | assert_cc(sizeof(int) == sizeof(int32_t)); | |
180 | ||
181 | r = sd_bus_message_enter_container(message, 'r', "iay"); | |
182 | if (r < 0) | |
183 | return r; | |
184 | if (r == 0) | |
185 | break; | |
186 | ||
187 | r = sd_bus_message_read(message, "i", &family); | |
188 | if (r < 0) | |
189 | return r; | |
190 | ||
191 | if (!IN_SET(family, AF_INET, AF_INET6)) | |
192 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family); | |
193 | ||
194 | r = sd_bus_message_read_array(message, 'y', &d, &sz); | |
195 | if (r < 0) | |
196 | return r; | |
197 | if (sz != FAMILY_ADDRESS_SIZE(family)) | |
198 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid address size"); | |
199 | ||
200 | r = sd_bus_message_exit_container(message); | |
201 | if (r < 0) | |
202 | return r; | |
203 | ||
204 | if (!GREEDY_REALLOC(dns, allocated, n+1)) | |
205 | return -ENOMEM; | |
206 | ||
207 | dns[n].family = family; | |
208 | memcpy(&dns[n].address, d, sz); | |
209 | n++; | |
210 | } | |
211 | ||
212 | r = sd_bus_message_exit_container(message); | |
213 | if (r < 0) | |
214 | return r; | |
215 | ||
216 | dns_server_mark_all(l->dns_servers); | |
217 | ||
218 | for (i = 0; i < n; i++) { | |
219 | DnsServer *s; | |
220 | ||
2817157b | 221 | s = dns_server_find(l->dns_servers, dns[i].family, &dns[i].address, 0); |
d2ec6608 LP |
222 | if (s) |
223 | dns_server_move_back_and_unmark(s); | |
224 | else { | |
2817157b | 225 | r = dns_server_new(l->manager, NULL, DNS_SERVER_LINK, l, dns[i].family, &dns[i].address, 0); |
d2ec6608 LP |
226 | if (r < 0) |
227 | goto clear; | |
228 | } | |
229 | ||
230 | } | |
231 | ||
232 | dns_server_unlink_marked(l->dns_servers); | |
233 | link_allocate_scopes(l); | |
234 | ||
235 | return sd_bus_reply_method_return(message, NULL); | |
236 | ||
237 | clear: | |
238 | dns_server_unlink_all(l->dns_servers); | |
239 | return r; | |
240 | } | |
241 | ||
ee116b54 | 242 | int bus_link_method_set_domains(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
d2ec6608 | 243 | Link *l = userdata; |
d2ec6608 LP |
244 | int r; |
245 | ||
246 | assert(message); | |
247 | assert(l); | |
248 | ||
ad44b56b | 249 | r = sd_bus_message_enter_container(message, 'a', "(sb)"); |
d2ec6608 LP |
250 | if (r < 0) |
251 | return r; | |
252 | ||
ad44b56b LP |
253 | for (;;) { |
254 | const char *name; | |
255 | int route_only; | |
d2ec6608 | 256 | |
ad44b56b | 257 | r = sd_bus_message_read(message, "(sb)", &name, &route_only); |
d2ec6608 LP |
258 | if (r < 0) |
259 | return r; | |
260 | if (r == 0) | |
ad44b56b LP |
261 | break; |
262 | ||
263 | r = dns_name_is_valid(name); | |
264 | if (r < 0) | |
265 | return r; | |
266 | if (r == 0) | |
267 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid search domain %s", name); | |
268 | if (!route_only && dns_name_is_root(name)) | |
d2ec6608 LP |
269 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Root domain is not suitable as search domain"); |
270 | } | |
271 | ||
272 | dns_search_domain_mark_all(l->search_domains); | |
273 | ||
ad44b56b LP |
274 | r = sd_bus_message_rewind(message, false); |
275 | if (r < 0) | |
276 | return r; | |
277 | ||
278 | for (;;) { | |
d2ec6608 | 279 | DnsSearchDomain *d; |
ad44b56b LP |
280 | const char *name; |
281 | int route_only; | |
d2ec6608 | 282 | |
ad44b56b LP |
283 | r = sd_bus_message_read(message, "(sb)", &name, &route_only); |
284 | if (r < 0) | |
285 | goto clear; | |
286 | if (r == 0) | |
287 | break; | |
288 | ||
289 | r = dns_search_domain_find(l->search_domains, name, &d); | |
d2ec6608 LP |
290 | if (r < 0) |
291 | goto clear; | |
292 | ||
293 | if (r > 0) | |
294 | dns_search_domain_move_back_and_unmark(d); | |
295 | else { | |
ad44b56b | 296 | r = dns_search_domain_new(l->manager, &d, DNS_SEARCH_DOMAIN_LINK, l, name); |
d2ec6608 LP |
297 | if (r < 0) |
298 | goto clear; | |
299 | } | |
ad44b56b LP |
300 | |
301 | d->route_only = route_only; | |
d2ec6608 LP |
302 | } |
303 | ||
ad44b56b LP |
304 | r = sd_bus_message_exit_container(message); |
305 | if (r < 0) | |
306 | goto clear; | |
307 | ||
d2ec6608 LP |
308 | dns_search_domain_unlink_marked(l->search_domains); |
309 | return sd_bus_reply_method_return(message, NULL); | |
310 | ||
311 | clear: | |
312 | dns_search_domain_unlink_all(l->search_domains); | |
313 | return r; | |
314 | } | |
315 | ||
316 | int bus_link_method_set_llmnr(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
317 | Link *l = userdata; | |
318 | ResolveSupport mode; | |
319 | const char *llmnr; | |
320 | int r; | |
321 | ||
322 | assert(message); | |
323 | assert(l); | |
324 | ||
325 | r = sd_bus_message_read(message, "s", &llmnr); | |
326 | if (r < 0) | |
327 | return r; | |
328 | ||
329 | if (isempty(llmnr)) | |
330 | mode = RESOLVE_SUPPORT_YES; | |
331 | else { | |
332 | mode = resolve_support_from_string(llmnr); | |
333 | if (mode < 0) | |
334 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid LLMNR setting: %s", llmnr); | |
335 | } | |
336 | ||
337 | l->llmnr_support = mode; | |
338 | link_allocate_scopes(l); | |
339 | link_add_rrs(l, false); | |
340 | ||
341 | return sd_bus_reply_method_return(message, NULL); | |
342 | } | |
343 | ||
344 | int bus_link_method_set_mdns(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
345 | Link *l = userdata; | |
346 | ResolveSupport mode; | |
347 | const char *mdns; | |
348 | int r; | |
349 | ||
350 | assert(message); | |
351 | assert(l); | |
352 | ||
353 | r = sd_bus_message_read(message, "s", &mdns); | |
354 | if (r < 0) | |
355 | return r; | |
356 | ||
357 | if (isempty(mdns)) | |
358 | mode = RESOLVE_SUPPORT_NO; | |
359 | else { | |
360 | mode = resolve_support_from_string(mdns); | |
361 | if (mode < 0) | |
362 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid MulticastDNS setting: %s", mdns); | |
363 | } | |
364 | ||
365 | l->mdns_support = mode; | |
366 | link_allocate_scopes(l); | |
367 | link_add_rrs(l, false); | |
368 | ||
369 | return sd_bus_reply_method_return(message, NULL); | |
370 | } | |
371 | ||
372 | int bus_link_method_set_dnssec(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
373 | Link *l = userdata; | |
374 | const char *dnssec; | |
375 | DnssecMode mode; | |
376 | int r; | |
377 | ||
378 | assert(message); | |
379 | assert(l); | |
380 | ||
381 | r = sd_bus_message_read(message, "s", &dnssec); | |
382 | if (r < 0) | |
383 | return r; | |
384 | ||
385 | if (isempty(dnssec)) | |
386 | mode = _DNSSEC_MODE_INVALID; | |
387 | else { | |
388 | mode = dnssec_mode_from_string(dnssec); | |
389 | if (mode < 0) | |
390 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid DNSSEC setting: %s", dnssec); | |
391 | } | |
392 | ||
393 | link_set_dnssec_mode(l, mode); | |
394 | ||
395 | return sd_bus_reply_method_return(message, NULL); | |
396 | } | |
397 | ||
398 | int bus_link_method_set_dnssec_negative_trust_anchors(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
399 | _cleanup_set_free_free_ Set *ns = NULL; | |
400 | _cleanup_free_ char **ntas = NULL; | |
401 | Link *l = userdata; | |
402 | int r; | |
403 | char **i; | |
404 | ||
405 | assert(message); | |
406 | assert(l); | |
407 | ||
408 | r = sd_bus_message_read_strv(message, &ntas); | |
409 | if (r < 0) | |
410 | return r; | |
411 | ||
412 | STRV_FOREACH(i, ntas) { | |
413 | r = dns_name_is_valid(*i); | |
414 | if (r < 0) | |
415 | return r; | |
416 | if (r == 0) | |
55abd6da | 417 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid negative trust anchor domain: %s", *i); |
d2ec6608 LP |
418 | } |
419 | ||
420 | ns = set_new(&dns_name_hash_ops); | |
421 | if (!ns) | |
422 | return -ENOMEM; | |
423 | ||
424 | STRV_FOREACH(i, ntas) { | |
425 | r = set_put_strdup(ns, *i); | |
426 | if (r < 0) | |
427 | return r; | |
428 | } | |
429 | ||
430 | set_free_free(l->dnssec_negative_trust_anchors); | |
431 | l->dnssec_negative_trust_anchors = ns; | |
432 | ns = NULL; | |
433 | ||
434 | return sd_bus_reply_method_return(message, NULL); | |
435 | } | |
436 | ||
437 | int bus_link_method_revert(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
438 | Link *l = userdata; | |
439 | ||
440 | assert(message); | |
441 | assert(l); | |
442 | ||
443 | link_flush_settings(l); | |
444 | link_allocate_scopes(l); | |
445 | link_add_rrs(l, false); | |
446 | ||
447 | return sd_bus_reply_method_return(message, NULL); | |
448 | } | |
449 | ||
3abaabda LP |
450 | const sd_bus_vtable link_vtable[] = { |
451 | SD_BUS_VTABLE_START(0), | |
452 | ||
453 | SD_BUS_PROPERTY("ScopesMask", "t", property_get_scopes_mask, 0, 0), | |
454 | SD_BUS_PROPERTY("DNS", "a(iay)", property_get_dns, 0, 0), | |
ad44b56b | 455 | SD_BUS_PROPERTY("Domains", "a(sb)", property_get_domains, 0, 0), |
3abaabda LP |
456 | SD_BUS_PROPERTY("LLMNR", "s", property_get_resolve_support, offsetof(Link, llmnr_support), 0), |
457 | SD_BUS_PROPERTY("MulticastDNS", "s", property_get_resolve_support, offsetof(Link, mdns_support), 0), | |
458 | SD_BUS_PROPERTY("DNSSEC", "s", property_get_dnssec_mode, offsetof(Link, dnssec_mode), 0), | |
459 | SD_BUS_PROPERTY("DNSSECNegativeTrustAnchors", "as", property_get_ntas, 0, 0), | |
c2cf6e0b | 460 | SD_BUS_PROPERTY("DNSSECSupported", "b", property_get_dnssec_supported, 0, 0), |
3abaabda | 461 | |
d2ec6608 | 462 | SD_BUS_METHOD("SetDNS", "a(iay)", NULL, bus_link_method_set_dns_servers, 0), |
ee116b54 | 463 | SD_BUS_METHOD("SetDomains", "a(sb)", NULL, bus_link_method_set_domains, 0), |
d2ec6608 LP |
464 | SD_BUS_METHOD("SetLLMNR", "s", NULL, bus_link_method_set_llmnr, 0), |
465 | SD_BUS_METHOD("SetMulticastDNS", "s", NULL, bus_link_method_set_mdns, 0), | |
466 | SD_BUS_METHOD("SetDNSSEC", "s", NULL, bus_link_method_set_dnssec, 0), | |
467 | SD_BUS_METHOD("SetDNSSECNegativeTrustAnchors", "as", NULL, bus_link_method_set_dnssec_negative_trust_anchors, 0), | |
468 | SD_BUS_METHOD("Revert", NULL, NULL, bus_link_method_revert, 0), | |
469 | ||
3abaabda LP |
470 | SD_BUS_VTABLE_END |
471 | }; | |
472 | ||
473 | int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { | |
474 | _cleanup_free_ char *e = NULL; | |
475 | Manager *m = userdata; | |
476 | int ifindex; | |
477 | Link *link; | |
478 | int r; | |
479 | ||
480 | assert(bus); | |
481 | assert(path); | |
482 | assert(interface); | |
483 | assert(found); | |
484 | assert(m); | |
485 | ||
486 | r = sd_bus_path_decode(path, "/org/freedesktop/resolve1/link", &e); | |
487 | if (r <= 0) | |
488 | return 0; | |
489 | ||
490 | r = parse_ifindex(e, &ifindex); | |
491 | if (r < 0) | |
492 | return 0; | |
493 | ||
494 | link = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
495 | if (!link) | |
496 | return 0; | |
497 | ||
498 | *found = link; | |
499 | return 1; | |
500 | } | |
501 | ||
502 | char *link_bus_path(Link *link) { | |
503 | _cleanup_free_ char *ifindex = NULL; | |
504 | char *p; | |
505 | int r; | |
506 | ||
507 | assert(link); | |
508 | ||
509 | if (asprintf(&ifindex, "%i", link->ifindex) < 0) | |
510 | return NULL; | |
511 | ||
512 | r = sd_bus_path_encode("/org/freedesktop/resolve1/link", ifindex, &p); | |
513 | if (r < 0) | |
514 | return NULL; | |
515 | ||
516 | return p; | |
517 | } | |
518 | ||
519 | int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { | |
520 | _cleanup_strv_free_ char **l = NULL; | |
521 | Manager *m = userdata; | |
522 | Link *link; | |
523 | Iterator i; | |
524 | unsigned c = 0; | |
525 | ||
526 | assert(bus); | |
527 | assert(path); | |
528 | assert(m); | |
529 | assert(nodes); | |
530 | ||
531 | l = new0(char*, hashmap_size(m->links) + 1); | |
532 | if (!l) | |
533 | return -ENOMEM; | |
534 | ||
535 | HASHMAP_FOREACH(link, m->links, i) { | |
536 | char *p; | |
537 | ||
538 | p = link_bus_path(link); | |
539 | if (!p) | |
540 | return -ENOMEM; | |
541 | ||
542 | l[c++] = p; | |
543 | } | |
544 | ||
545 | l[c] = NULL; | |
546 | *nodes = l; | |
547 | l = NULL; | |
548 | ||
549 | return 1; | |
550 | } |