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992c052c LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2013 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 | ||
b5efdb8a | 20 | #include "alloc-util.h" |
992c052c | 21 | #include "bus-internal.h" |
07630cea | 22 | #include "bus-introspect.h" |
992c052c | 23 | #include "bus-message.h" |
cf0fbc49 | 24 | #include "bus-objects.h" |
992c052c | 25 | #include "bus-signature.h" |
19befb2d | 26 | #include "bus-slot.h" |
07630cea LP |
27 | #include "bus-type.h" |
28 | #include "bus-util.h" | |
29 | #include "set.h" | |
30 | #include "string-util.h" | |
31 | #include "strv.h" | |
992c052c LP |
32 | |
33 | static int node_vtable_get_userdata( | |
34 | sd_bus *bus, | |
35 | const char *path, | |
36 | struct node_vtable *c, | |
f00c3121 LP |
37 | void **userdata, |
38 | sd_bus_error *error) { | |
992c052c | 39 | |
19befb2d | 40 | sd_bus_slot *s; |
992c052c LP |
41 | void *u; |
42 | int r; | |
43 | ||
44 | assert(bus); | |
45 | assert(path); | |
46 | assert(c); | |
47 | ||
19befb2d LP |
48 | s = container_of(c, sd_bus_slot, node_vtable); |
49 | u = s->userdata; | |
992c052c | 50 | if (c->find) { |
1b64f838 | 51 | bus->current_slot = sd_bus_slot_ref(s); |
caa82984 | 52 | bus->current_userdata = u; |
f00c3121 | 53 | r = c->find(bus, path, c->interface, u, &u, error); |
caa82984 | 54 | bus->current_userdata = NULL; |
1b64f838 | 55 | bus->current_slot = sd_bus_slot_unref(s); |
19befb2d | 56 | |
f00c3121 LP |
57 | if (r < 0) |
58 | return r; | |
59 | if (sd_bus_error_is_set(error)) | |
5958d089 | 60 | return -sd_bus_error_get_errno(error); |
f00c3121 | 61 | if (r == 0) |
992c052c LP |
62 | return r; |
63 | } | |
64 | ||
65 | if (userdata) | |
66 | *userdata = u; | |
67 | ||
68 | return 1; | |
69 | } | |
70 | ||
09c8a7c6 | 71 | static void *vtable_method_convert_userdata(const sd_bus_vtable *p, void *u) { |
72 | assert(p); | |
73 | ||
74 | return (uint8_t*) u + p->x.method.offset; | |
75 | } | |
76 | ||
992c052c LP |
77 | static void *vtable_property_convert_userdata(const sd_bus_vtable *p, void *u) { |
78 | assert(p); | |
79 | ||
77a874a3 | 80 | return (uint8_t*) u + p->x.property.offset; |
992c052c LP |
81 | } |
82 | ||
83 | static int vtable_property_get_userdata( | |
84 | sd_bus *bus, | |
85 | const char *path, | |
86 | struct vtable_member *p, | |
f00c3121 LP |
87 | void **userdata, |
88 | sd_bus_error *error) { | |
992c052c LP |
89 | |
90 | void *u; | |
91 | int r; | |
92 | ||
93 | assert(bus); | |
94 | assert(path); | |
95 | assert(p); | |
96 | assert(userdata); | |
97 | ||
f00c3121 | 98 | r = node_vtable_get_userdata(bus, path, p->parent, &u, error); |
992c052c LP |
99 | if (r <= 0) |
100 | return r; | |
68313d3d LP |
101 | if (bus->nodes_modified) |
102 | return 0; | |
992c052c LP |
103 | |
104 | *userdata = vtable_property_convert_userdata(p->vtable, u); | |
105 | return 1; | |
106 | } | |
107 | ||
dfa92725 LP |
108 | static int add_enumerated_to_set( |
109 | sd_bus *bus, | |
110 | const char *prefix, | |
111 | struct node_enumerator *first, | |
f00c3121 LP |
112 | Set *s, |
113 | sd_bus_error *error) { | |
dfa92725 | 114 | |
992c052c LP |
115 | struct node_enumerator *c; |
116 | int r; | |
117 | ||
118 | assert(bus); | |
119 | assert(prefix); | |
120 | assert(s); | |
121 | ||
122 | LIST_FOREACH(enumerators, c, first) { | |
123 | char **children = NULL, **k; | |
1b64f838 | 124 | sd_bus_slot *slot; |
992c052c | 125 | |
68313d3d LP |
126 | if (bus->nodes_modified) |
127 | return 0; | |
128 | ||
1b64f838 LP |
129 | slot = container_of(c, sd_bus_slot, node_enumerator); |
130 | ||
131 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 | 132 | bus->current_userdata = slot->userdata; |
1b64f838 | 133 | r = c->callback(bus, prefix, slot->userdata, &children, error); |
caa82984 | 134 | bus->current_userdata = NULL; |
1b64f838 | 135 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 136 | |
992c052c LP |
137 | if (r < 0) |
138 | return r; | |
f00c3121 | 139 | if (sd_bus_error_is_set(error)) |
5958d089 | 140 | return -sd_bus_error_get_errno(error); |
992c052c LP |
141 | |
142 | STRV_FOREACH(k, children) { | |
143 | if (r < 0) { | |
144 | free(*k); | |
145 | continue; | |
146 | } | |
147 | ||
9ed794a3 | 148 | if (!object_path_is_valid(*k)) { |
992c052c LP |
149 | free(*k); |
150 | r = -EINVAL; | |
151 | continue; | |
152 | } | |
153 | ||
5d66866d LP |
154 | if (!object_path_startswith(*k, prefix)) { |
155 | free(*k); | |
156 | continue; | |
157 | } | |
158 | ||
992c052c | 159 | r = set_consume(s, *k); |
52c7f2b2 LP |
160 | if (r == -EEXIST) |
161 | r = 0; | |
992c052c LP |
162 | } |
163 | ||
164 | free(children); | |
165 | if (r < 0) | |
166 | return r; | |
167 | } | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
44eb1add DH |
172 | enum { |
173 | /* if set, add_subtree() works recursively */ | |
174 | CHILDREN_RECURSIVE = (1U << 1), | |
175 | /* if set, add_subtree() scans object-manager hierarchies recursively */ | |
176 | CHILDREN_SUBHIERARCHIES = (1U << 0), | |
177 | }; | |
178 | ||
dfa92725 LP |
179 | static int add_subtree_to_set( |
180 | sd_bus *bus, | |
181 | const char *prefix, | |
182 | struct node *n, | |
44eb1add | 183 | unsigned int flags, |
f00c3121 LP |
184 | Set *s, |
185 | sd_bus_error *error) { | |
dfa92725 | 186 | |
992c052c LP |
187 | struct node *i; |
188 | int r; | |
189 | ||
190 | assert(bus); | |
191 | assert(prefix); | |
192 | assert(n); | |
193 | assert(s); | |
194 | ||
f00c3121 | 195 | r = add_enumerated_to_set(bus, prefix, n->enumerators, s, error); |
992c052c LP |
196 | if (r < 0) |
197 | return r; | |
68313d3d LP |
198 | if (bus->nodes_modified) |
199 | return 0; | |
992c052c LP |
200 | |
201 | LIST_FOREACH(siblings, i, n->child) { | |
202 | char *t; | |
203 | ||
5d66866d LP |
204 | if (!object_path_startswith(i->path, prefix)) |
205 | continue; | |
206 | ||
992c052c LP |
207 | t = strdup(i->path); |
208 | if (!t) | |
209 | return -ENOMEM; | |
210 | ||
211 | r = set_consume(s, t); | |
212 | if (r < 0 && r != -EEXIST) | |
213 | return r; | |
214 | ||
44eb1add DH |
215 | if ((flags & CHILDREN_RECURSIVE) && |
216 | ((flags & CHILDREN_SUBHIERARCHIES) || !i->object_managers)) { | |
217 | r = add_subtree_to_set(bus, prefix, i, flags, s, error); | |
2d5c8a27 DH |
218 | if (r < 0) |
219 | return r; | |
220 | if (bus->nodes_modified) | |
221 | return 0; | |
222 | } | |
992c052c LP |
223 | } |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
dfa92725 LP |
228 | static int get_child_nodes( |
229 | sd_bus *bus, | |
230 | const char *prefix, | |
231 | struct node *n, | |
44eb1add | 232 | unsigned int flags, |
f00c3121 LP |
233 | Set **_s, |
234 | sd_bus_error *error) { | |
dfa92725 | 235 | |
992c052c LP |
236 | Set *s = NULL; |
237 | int r; | |
238 | ||
239 | assert(bus); | |
dfa92725 | 240 | assert(prefix); |
992c052c LP |
241 | assert(n); |
242 | assert(_s); | |
243 | ||
d5099efc | 244 | s = set_new(&string_hash_ops); |
992c052c LP |
245 | if (!s) |
246 | return -ENOMEM; | |
247 | ||
44eb1add | 248 | r = add_subtree_to_set(bus, prefix, n, flags, s, error); |
992c052c LP |
249 | if (r < 0) { |
250 | set_free_free(s); | |
251 | return r; | |
252 | } | |
253 | ||
254 | *_s = s; | |
255 | return 0; | |
256 | } | |
257 | ||
258 | static int node_callbacks_run( | |
259 | sd_bus *bus, | |
260 | sd_bus_message *m, | |
261 | struct node_callback *first, | |
262 | bool require_fallback, | |
263 | bool *found_object) { | |
264 | ||
265 | struct node_callback *c; | |
266 | int r; | |
267 | ||
268 | assert(bus); | |
269 | assert(m); | |
270 | assert(found_object); | |
271 | ||
272 | LIST_FOREACH(callbacks, c, first) { | |
4afd3348 | 273 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
1b64f838 | 274 | sd_bus_slot *slot; |
ebcf1f97 | 275 | |
68313d3d LP |
276 | if (bus->nodes_modified) |
277 | return 0; | |
278 | ||
992c052c LP |
279 | if (require_fallback && !c->is_fallback) |
280 | continue; | |
281 | ||
282 | *found_object = true; | |
283 | ||
284 | if (c->last_iteration == bus->iteration_counter) | |
285 | continue; | |
286 | ||
68313d3d LP |
287 | c->last_iteration = bus->iteration_counter; |
288 | ||
992c052c LP |
289 | r = sd_bus_message_rewind(m, true); |
290 | if (r < 0) | |
291 | return r; | |
292 | ||
1b64f838 LP |
293 | slot = container_of(c, sd_bus_slot, node_callback); |
294 | ||
295 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
296 | bus->current_handler = c->callback; |
297 | bus->current_userdata = slot->userdata; | |
19070062 | 298 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
299 | bus->current_userdata = NULL; |
300 | bus->current_handler = NULL; | |
1b64f838 | 301 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 302 | |
ebcf1f97 | 303 | r = bus_maybe_reply_error(m, r, &error_buffer); |
992c052c LP |
304 | if (r != 0) |
305 | return r; | |
306 | } | |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
adacb957 LP |
311 | #define CAPABILITY_SHIFT(x) (((x) >> __builtin_ctzll(_SD_BUS_VTABLE_CAPABILITY_MASK)) & 0xFFFF) |
312 | ||
313 | static int check_access(sd_bus *bus, sd_bus_message *m, struct vtable_member *c, sd_bus_error *error) { | |
adacb957 | 314 | uint64_t cap; |
adacb957 LP |
315 | int r; |
316 | ||
317 | assert(bus); | |
318 | assert(m); | |
319 | assert(c); | |
320 | ||
321 | /* If the entire bus is trusted let's grant access */ | |
322 | if (bus->trusted) | |
323 | return 0; | |
324 | ||
325 | /* If the member is marked UNPRIVILEGED let's grant access */ | |
326 | if (c->vtable->flags & SD_BUS_VTABLE_UNPRIVILEGED) | |
327 | return 0; | |
328 | ||
adacb957 LP |
329 | /* Check have the caller has the requested capability |
330 | * set. Note that the flags value contains the capability | |
331 | * number plus one, which we need to subtract here. We do this | |
332 | * so that we have 0 as special value for "default | |
333 | * capability". */ | |
334 | cap = CAPABILITY_SHIFT(c->vtable->flags); | |
335 | if (cap == 0) | |
336 | cap = CAPABILITY_SHIFT(c->parent->vtable[0].flags); | |
337 | if (cap == 0) | |
338 | cap = CAP_SYS_ADMIN; | |
339 | else | |
313cefa1 | 340 | cap--; |
adacb957 | 341 | |
def9a7aa LP |
342 | r = sd_bus_query_sender_privilege(m, cap); |
343 | if (r < 0) | |
344 | return r; | |
adacb957 | 345 | if (r > 0) |
def9a7aa | 346 | return 0; |
adacb957 LP |
347 | |
348 | return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Access to %s.%s() not permitted.", c->interface, c->member); | |
349 | } | |
350 | ||
992c052c LP |
351 | static int method_callbacks_run( |
352 | sd_bus *bus, | |
353 | sd_bus_message *m, | |
354 | struct vtable_member *c, | |
355 | bool require_fallback, | |
356 | bool *found_object) { | |
357 | ||
4afd3348 | 358 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
359 | const char *signature; |
360 | void *u; | |
361 | int r; | |
362 | ||
363 | assert(bus); | |
364 | assert(m); | |
365 | assert(c); | |
366 | assert(found_object); | |
367 | ||
368 | if (require_fallback && !c->parent->is_fallback) | |
369 | return 0; | |
370 | ||
adacb957 LP |
371 | r = check_access(bus, m, c, &error); |
372 | if (r < 0) | |
373 | return bus_maybe_reply_error(m, r, &error); | |
374 | ||
f00c3121 | 375 | r = node_vtable_get_userdata(bus, m->path, c->parent, &u, &error); |
992c052c | 376 | if (r <= 0) |
f00c3121 | 377 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
378 | if (bus->nodes_modified) |
379 | return 0; | |
992c052c | 380 | |
09c8a7c6 | 381 | u = vtable_method_convert_userdata(c->vtable, u); |
382 | ||
992c052c LP |
383 | *found_object = true; |
384 | ||
68313d3d LP |
385 | if (c->last_iteration == bus->iteration_counter) |
386 | return 0; | |
387 | ||
388 | c->last_iteration = bus->iteration_counter; | |
389 | ||
992c052c LP |
390 | r = sd_bus_message_rewind(m, true); |
391 | if (r < 0) | |
392 | return r; | |
393 | ||
40ca29a1 LP |
394 | signature = sd_bus_message_get_signature(m, true); |
395 | if (!signature) | |
396 | return -EINVAL; | |
992c052c | 397 | |
f00c3121 | 398 | if (!streq(strempty(c->vtable->x.method.signature), signature)) |
86b8d289 LP |
399 | return sd_bus_reply_method_errorf( |
400 | m, | |
401 | SD_BUS_ERROR_INVALID_ARGS, | |
402 | "Invalid arguments '%s' to call %s.%s(), expecting '%s'.", | |
403 | signature, c->interface, c->member, strempty(c->vtable->x.method.signature)); | |
992c052c | 404 | |
6717d473 LP |
405 | /* Keep track what the signature of the reply to this message |
406 | * should be, so that this can be enforced when sealing the | |
407 | * reply. */ | |
408 | m->enforced_reply_signature = strempty(c->vtable->x.method.result); | |
409 | ||
ebcf1f97 | 410 | if (c->vtable->x.method.handler) { |
1b64f838 LP |
411 | sd_bus_slot *slot; |
412 | ||
413 | slot = container_of(c->parent, sd_bus_slot, node_vtable); | |
19befb2d | 414 | |
1b64f838 | 415 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
416 | bus->current_handler = c->vtable->x.method.handler; |
417 | bus->current_userdata = u; | |
19070062 | 418 | r = c->vtable->x.method.handler(m, u, &error); |
caa82984 LP |
419 | bus->current_userdata = NULL; |
420 | bus->current_handler = NULL; | |
1b64f838 | 421 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 422 | |
f00c3121 | 423 | return bus_maybe_reply_error(m, r, &error); |
ebcf1f97 | 424 | } |
992c052c LP |
425 | |
426 | /* If the method callback is NULL, make this a successful NOP */ | |
df2d202e | 427 | r = sd_bus_reply_method_return(m, NULL); |
992c052c LP |
428 | if (r < 0) |
429 | return r; | |
430 | ||
431 | return 1; | |
432 | } | |
433 | ||
434 | static int invoke_property_get( | |
435 | sd_bus *bus, | |
19befb2d | 436 | sd_bus_slot *slot, |
992c052c LP |
437 | const sd_bus_vtable *v, |
438 | const char *path, | |
439 | const char *interface, | |
440 | const char *property, | |
ebcf1f97 LP |
441 | sd_bus_message *reply, |
442 | void *userdata, | |
443 | sd_bus_error *error) { | |
992c052c | 444 | |
af8601fa | 445 | const void *p; |
f00c3121 | 446 | int r; |
992c052c LP |
447 | |
448 | assert(bus); | |
19befb2d | 449 | assert(slot); |
992c052c | 450 | assert(v); |
dfa92725 LP |
451 | assert(path); |
452 | assert(interface); | |
453 | assert(property); | |
ebcf1f97 | 454 | assert(reply); |
992c052c | 455 | |
f00c3121 | 456 | if (v->x.property.get) { |
19befb2d | 457 | |
1b64f838 | 458 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 | 459 | bus->current_userdata = userdata; |
f00c3121 | 460 | r = v->x.property.get(bus, path, interface, property, reply, userdata, error); |
caa82984 | 461 | bus->current_userdata = NULL; |
1b64f838 | 462 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 463 | |
f00c3121 LP |
464 | if (r < 0) |
465 | return r; | |
466 | if (sd_bus_error_is_set(error)) | |
5958d089 | 467 | return -sd_bus_error_get_errno(error); |
f00c3121 LP |
468 | return r; |
469 | } | |
992c052c LP |
470 | |
471 | /* Automatic handling if no callback is defined. */ | |
472 | ||
c13c7de3 | 473 | if (streq(v->x.property.signature, "as")) |
ebcf1f97 | 474 | return sd_bus_message_append_strv(reply, *(char***) userdata); |
c13c7de3 | 475 | |
77a874a3 LP |
476 | assert(signature_is_single(v->x.property.signature, false)); |
477 | assert(bus_type_is_basic(v->x.property.signature[0])); | |
992c052c | 478 | |
77a874a3 | 479 | switch (v->x.property.signature[0]) { |
992c052c LP |
480 | |
481 | case SD_BUS_TYPE_STRING: | |
28d6633a LP |
482 | case SD_BUS_TYPE_SIGNATURE: |
483 | p = strempty(*(char**) userdata); | |
af8601fa KS |
484 | break; |
485 | ||
992c052c | 486 | case SD_BUS_TYPE_OBJECT_PATH: |
992c052c | 487 | p = *(char**) userdata; |
28d6633a | 488 | assert(p); |
992c052c LP |
489 | break; |
490 | ||
491 | default: | |
492 | p = userdata; | |
493 | break; | |
494 | } | |
495 | ||
ebcf1f97 | 496 | return sd_bus_message_append_basic(reply, v->x.property.signature[0], p); |
992c052c LP |
497 | } |
498 | ||
499 | static int invoke_property_set( | |
500 | sd_bus *bus, | |
19befb2d | 501 | sd_bus_slot *slot, |
992c052c LP |
502 | const sd_bus_vtable *v, |
503 | const char *path, | |
504 | const char *interface, | |
505 | const char *property, | |
506 | sd_bus_message *value, | |
ebcf1f97 LP |
507 | void *userdata, |
508 | sd_bus_error *error) { | |
992c052c LP |
509 | |
510 | int r; | |
511 | ||
512 | assert(bus); | |
19befb2d | 513 | assert(slot); |
992c052c | 514 | assert(v); |
dfa92725 LP |
515 | assert(path); |
516 | assert(interface); | |
517 | assert(property); | |
518 | assert(value); | |
992c052c | 519 | |
f00c3121 | 520 | if (v->x.property.set) { |
19befb2d | 521 | |
1b64f838 | 522 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 | 523 | bus->current_userdata = userdata; |
f00c3121 | 524 | r = v->x.property.set(bus, path, interface, property, value, userdata, error); |
caa82984 | 525 | bus->current_userdata = NULL; |
1b64f838 | 526 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 527 | |
f00c3121 LP |
528 | if (r < 0) |
529 | return r; | |
530 | if (sd_bus_error_is_set(error)) | |
5958d089 | 531 | return -sd_bus_error_get_errno(error); |
f00c3121 LP |
532 | return r; |
533 | } | |
992c052c LP |
534 | |
535 | /* Automatic handling if no callback is defined. */ | |
536 | ||
77a874a3 LP |
537 | assert(signature_is_single(v->x.property.signature, false)); |
538 | assert(bus_type_is_basic(v->x.property.signature[0])); | |
992c052c | 539 | |
77a874a3 | 540 | switch (v->x.property.signature[0]) { |
992c052c LP |
541 | |
542 | case SD_BUS_TYPE_STRING: | |
543 | case SD_BUS_TYPE_OBJECT_PATH: | |
544 | case SD_BUS_TYPE_SIGNATURE: { | |
545 | const char *p; | |
546 | char *n; | |
547 | ||
77a874a3 | 548 | r = sd_bus_message_read_basic(value, v->x.property.signature[0], &p); |
992c052c LP |
549 | if (r < 0) |
550 | return r; | |
551 | ||
552 | n = strdup(p); | |
553 | if (!n) | |
554 | return -ENOMEM; | |
555 | ||
556 | free(*(char**) userdata); | |
557 | *(char**) userdata = n; | |
558 | ||
559 | break; | |
560 | } | |
561 | ||
562 | default: | |
77a874a3 | 563 | r = sd_bus_message_read_basic(value, v->x.property.signature[0], userdata); |
992c052c LP |
564 | if (r < 0) |
565 | return r; | |
566 | ||
567 | break; | |
568 | } | |
569 | ||
570 | return 1; | |
571 | } | |
572 | ||
573 | static int property_get_set_callbacks_run( | |
574 | sd_bus *bus, | |
575 | sd_bus_message *m, | |
576 | struct vtable_member *c, | |
577 | bool require_fallback, | |
578 | bool is_get, | |
579 | bool *found_object) { | |
580 | ||
4afd3348 LP |
581 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
582 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
19befb2d | 583 | sd_bus_slot *slot; |
c94d7fc3 | 584 | void *u = NULL; |
992c052c LP |
585 | int r; |
586 | ||
587 | assert(bus); | |
588 | assert(m); | |
dfa92725 | 589 | assert(c); |
992c052c LP |
590 | assert(found_object); |
591 | ||
592 | if (require_fallback && !c->parent->is_fallback) | |
593 | return 0; | |
594 | ||
f00c3121 | 595 | r = vtable_property_get_userdata(bus, m->path, c, &u, &error); |
992c052c | 596 | if (r <= 0) |
f00c3121 | 597 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
598 | if (bus->nodes_modified) |
599 | return 0; | |
992c052c | 600 | |
19befb2d LP |
601 | slot = container_of(c->parent, sd_bus_slot, node_vtable); |
602 | ||
992c052c LP |
603 | *found_object = true; |
604 | ||
df2d202e | 605 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
606 | if (r < 0) |
607 | return r; | |
608 | ||
992c052c | 609 | if (is_get) { |
68313d3d LP |
610 | /* Note that we do not protect against reexecution |
611 | * here (using the last_iteration check, see below), | |
612 | * should the node tree have changed and we got called | |
613 | * again. We assume that property Get() calls are | |
614 | * ultimately without side-effects or if they aren't | |
615 | * then at least idempotent. */ | |
616 | ||
77a874a3 | 617 | r = sd_bus_message_open_container(reply, 'v', c->vtable->x.property.signature); |
992c052c LP |
618 | if (r < 0) |
619 | return r; | |
620 | ||
adacb957 LP |
621 | /* Note that we do not do an access check here. Read |
622 | * access to properties is always unrestricted, since | |
623 | * PropertiesChanged signals broadcast contents | |
624 | * anyway. */ | |
625 | ||
19befb2d | 626 | r = invoke_property_get(bus, slot, c->vtable, m->path, c->interface, c->member, reply, u, &error); |
992c052c | 627 | if (r < 0) |
f00c3121 | 628 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 629 | |
68313d3d LP |
630 | if (bus->nodes_modified) |
631 | return 0; | |
632 | ||
992c052c LP |
633 | r = sd_bus_message_close_container(reply); |
634 | if (r < 0) | |
635 | return r; | |
636 | ||
637 | } else { | |
0ca454d4 LP |
638 | const char *signature = NULL; |
639 | char type = 0; | |
640 | ||
992c052c | 641 | if (c->vtable->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) |
ebcf1f97 | 642 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_PROPERTY_READ_ONLY, "Property '%s' is not writable.", c->member); |
68313d3d | 643 | |
ebcf1f97 LP |
644 | /* Avoid that we call the set routine more than once |
645 | * if the processing of this message got restarted | |
646 | * because the node tree changed. */ | |
647 | if (c->last_iteration == bus->iteration_counter) | |
648 | return 0; | |
992c052c | 649 | |
ebcf1f97 | 650 | c->last_iteration = bus->iteration_counter; |
992c052c | 651 | |
0ca454d4 LP |
652 | r = sd_bus_message_peek_type(m, &type, &signature); |
653 | if (r < 0) | |
654 | return r; | |
655 | ||
656 | if (type != 'v' || !streq(strempty(signature), strempty(c->vtable->x.property.signature))) | |
657 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Incorrect parameters for property '%s', expected '%s', got '%s'.", c->member, strempty(c->vtable->x.property.signature), strempty(signature)); | |
658 | ||
ebcf1f97 LP |
659 | r = sd_bus_message_enter_container(m, 'v', c->vtable->x.property.signature); |
660 | if (r < 0) | |
661 | return r; | |
992c052c | 662 | |
adacb957 LP |
663 | r = check_access(bus, m, c, &error); |
664 | if (r < 0) | |
665 | return bus_maybe_reply_error(m, r, &error); | |
666 | ||
19befb2d | 667 | r = invoke_property_set(bus, slot, c->vtable, m->path, c->interface, c->member, m, u, &error); |
ebcf1f97 | 668 | if (r < 0) |
f00c3121 | 669 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 670 | |
68313d3d LP |
671 | if (bus->nodes_modified) |
672 | return 0; | |
673 | ||
992c052c LP |
674 | r = sd_bus_message_exit_container(m); |
675 | if (r < 0) | |
676 | return r; | |
677 | } | |
678 | ||
679 | r = sd_bus_send(bus, reply, NULL); | |
680 | if (r < 0) | |
681 | return r; | |
682 | ||
683 | return 1; | |
684 | } | |
685 | ||
a03e4337 LP |
686 | static int vtable_append_one_property( |
687 | sd_bus *bus, | |
688 | sd_bus_message *reply, | |
689 | const char *path, | |
690 | struct node_vtable *c, | |
691 | const sd_bus_vtable *v, | |
692 | void *userdata, | |
693 | sd_bus_error *error) { | |
694 | ||
19befb2d | 695 | sd_bus_slot *slot; |
a03e4337 LP |
696 | int r; |
697 | ||
698 | assert(bus); | |
699 | assert(reply); | |
700 | assert(path); | |
701 | assert(c); | |
702 | assert(v); | |
703 | ||
704 | r = sd_bus_message_open_container(reply, 'e', "sv"); | |
705 | if (r < 0) | |
706 | return r; | |
707 | ||
708 | r = sd_bus_message_append(reply, "s", v->x.property.member); | |
709 | if (r < 0) | |
710 | return r; | |
711 | ||
712 | r = sd_bus_message_open_container(reply, 'v', v->x.property.signature); | |
713 | if (r < 0) | |
714 | return r; | |
715 | ||
19befb2d LP |
716 | slot = container_of(c, sd_bus_slot, node_vtable); |
717 | ||
718 | r = invoke_property_get(bus, slot, v, path, c->interface, v->x.property.member, reply, vtable_property_convert_userdata(v, userdata), error); | |
a03e4337 LP |
719 | if (r < 0) |
720 | return r; | |
721 | if (bus->nodes_modified) | |
722 | return 0; | |
723 | ||
724 | r = sd_bus_message_close_container(reply); | |
725 | if (r < 0) | |
726 | return r; | |
727 | ||
728 | r = sd_bus_message_close_container(reply); | |
729 | if (r < 0) | |
730 | return r; | |
731 | ||
732 | return 0; | |
733 | } | |
734 | ||
992c052c LP |
735 | static int vtable_append_all_properties( |
736 | sd_bus *bus, | |
737 | sd_bus_message *reply, | |
738 | const char *path, | |
739 | struct node_vtable *c, | |
740 | void *userdata, | |
741 | sd_bus_error *error) { | |
742 | ||
743 | const sd_bus_vtable *v; | |
744 | int r; | |
745 | ||
746 | assert(bus); | |
747 | assert(reply); | |
dfa92725 | 748 | assert(path); |
992c052c LP |
749 | assert(c); |
750 | ||
6e8df5f0 LP |
751 | if (c->vtable[0].flags & SD_BUS_VTABLE_HIDDEN) |
752 | return 1; | |
753 | ||
992c052c LP |
754 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
755 | if (v->type != _SD_BUS_VTABLE_PROPERTY && v->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) | |
756 | continue; | |
757 | ||
6e8df5f0 LP |
758 | if (v->flags & SD_BUS_VTABLE_HIDDEN) |
759 | continue; | |
760 | ||
33702051 LP |
761 | if (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT) |
762 | continue; | |
763 | ||
a03e4337 | 764 | r = vtable_append_one_property(bus, reply, path, c, v, userdata, error); |
f00c3121 LP |
765 | if (r < 0) |
766 | return r; | |
68313d3d LP |
767 | if (bus->nodes_modified) |
768 | return 0; | |
992c052c LP |
769 | } |
770 | ||
771 | return 1; | |
772 | } | |
773 | ||
774 | static int property_get_all_callbacks_run( | |
775 | sd_bus *bus, | |
776 | sd_bus_message *m, | |
777 | struct node_vtable *first, | |
778 | bool require_fallback, | |
779 | const char *iface, | |
780 | bool *found_object) { | |
781 | ||
4afd3348 | 782 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
992c052c | 783 | struct node_vtable *c; |
bd037038 | 784 | bool found_interface; |
992c052c LP |
785 | int r; |
786 | ||
787 | assert(bus); | |
788 | assert(m); | |
789 | assert(found_object); | |
790 | ||
df2d202e | 791 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
792 | if (r < 0) |
793 | return r; | |
794 | ||
795 | r = sd_bus_message_open_container(reply, 'a', "{sv}"); | |
796 | if (r < 0) | |
797 | return r; | |
798 | ||
38911893 | 799 | found_interface = !iface || |
bd037038 LP |
800 | streq(iface, "org.freedesktop.DBus.Properties") || |
801 | streq(iface, "org.freedesktop.DBus.Peer") || | |
802 | streq(iface, "org.freedesktop.DBus.Introspectable"); | |
803 | ||
992c052c | 804 | LIST_FOREACH(vtables, c, first) { |
4afd3348 | 805 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
806 | void *u; |
807 | ||
808 | if (require_fallback && !c->is_fallback) | |
809 | continue; | |
810 | ||
f00c3121 | 811 | r = node_vtable_get_userdata(bus, m->path, c, &u, &error); |
992c052c | 812 | if (r < 0) |
f00c3121 | 813 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
814 | if (bus->nodes_modified) |
815 | return 0; | |
992c052c LP |
816 | if (r == 0) |
817 | continue; | |
818 | ||
819 | *found_object = true; | |
820 | ||
821 | if (iface && !streq(c->interface, iface)) | |
822 | continue; | |
823 | found_interface = true; | |
824 | ||
992c052c LP |
825 | r = vtable_append_all_properties(bus, reply, m->path, c, u, &error); |
826 | if (r < 0) | |
f00c3121 | 827 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
828 | if (bus->nodes_modified) |
829 | return 0; | |
992c052c LP |
830 | } |
831 | ||
832 | if (!found_interface) { | |
833 | r = sd_bus_reply_method_errorf( | |
df2d202e | 834 | m, |
40ca29a1 | 835 | SD_BUS_ERROR_UNKNOWN_INTERFACE, |
992c052c LP |
836 | "Unknown interface '%s'.", iface); |
837 | if (r < 0) | |
838 | return r; | |
839 | ||
840 | return 1; | |
841 | } | |
842 | ||
843 | r = sd_bus_message_close_container(reply); | |
844 | if (r < 0) | |
845 | return r; | |
846 | ||
847 | r = sd_bus_send(bus, reply, NULL); | |
848 | if (r < 0) | |
849 | return r; | |
850 | ||
851 | return 1; | |
852 | } | |
853 | ||
ff02f101 | 854 | static int bus_node_exists( |
dfa92725 LP |
855 | sd_bus *bus, |
856 | struct node *n, | |
857 | const char *path, | |
858 | bool require_fallback) { | |
859 | ||
992c052c LP |
860 | struct node_vtable *c; |
861 | struct node_callback *k; | |
ff02f101 | 862 | int r; |
992c052c LP |
863 | |
864 | assert(bus); | |
865 | assert(n); | |
dfa92725 | 866 | assert(path); |
992c052c LP |
867 | |
868 | /* Tests if there's anything attached directly to this node | |
869 | * for the specified path */ | |
870 | ||
ff02f101 DH |
871 | if (!require_fallback && (n->enumerators || n->object_managers)) |
872 | return true; | |
873 | ||
992c052c LP |
874 | LIST_FOREACH(callbacks, k, n->callbacks) { |
875 | if (require_fallback && !k->is_fallback) | |
876 | continue; | |
877 | ||
ff02f101 | 878 | return 1; |
992c052c LP |
879 | } |
880 | ||
881 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 882 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
883 | |
884 | if (require_fallback && !c->is_fallback) | |
885 | continue; | |
886 | ||
ff02f101 DH |
887 | r = node_vtable_get_userdata(bus, path, c, NULL, &error); |
888 | if (r != 0) | |
889 | return r; | |
68313d3d | 890 | if (bus->nodes_modified) |
ff02f101 | 891 | return 0; |
992c052c LP |
892 | } |
893 | ||
ff02f101 | 894 | return 0; |
992c052c LP |
895 | } |
896 | ||
897 | static int process_introspect( | |
898 | sd_bus *bus, | |
899 | sd_bus_message *m, | |
900 | struct node *n, | |
901 | bool require_fallback, | |
902 | bool *found_object) { | |
903 | ||
4afd3348 LP |
904 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
905 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
992c052c | 906 | _cleanup_set_free_free_ Set *s = NULL; |
718db961 | 907 | const char *previous_interface = NULL; |
992c052c LP |
908 | struct introspect intro; |
909 | struct node_vtable *c; | |
910 | bool empty; | |
911 | int r; | |
912 | ||
913 | assert(bus); | |
914 | assert(m); | |
915 | assert(n); | |
916 | assert(found_object); | |
917 | ||
44eb1add | 918 | r = get_child_nodes(bus, m->path, n, 0, &s, &error); |
992c052c | 919 | if (r < 0) |
f00c3121 | 920 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
921 | if (bus->nodes_modified) |
922 | return 0; | |
992c052c | 923 | |
7fb411f0 | 924 | r = introspect_begin(&intro, bus->trusted); |
992c052c LP |
925 | if (r < 0) |
926 | return r; | |
927 | ||
943c3f94 | 928 | r = introspect_write_default_interfaces(&intro, !require_fallback && n->object_managers); |
992c052c LP |
929 | if (r < 0) |
930 | return r; | |
931 | ||
932 | empty = set_isempty(s); | |
933 | ||
934 | LIST_FOREACH(vtables, c, n->vtables) { | |
935 | if (require_fallback && !c->is_fallback) | |
936 | continue; | |
937 | ||
f00c3121 LP |
938 | r = node_vtable_get_userdata(bus, m->path, c, NULL, &error); |
939 | if (r < 0) { | |
940 | r = bus_maybe_reply_error(m, r, &error); | |
941 | goto finish; | |
942 | } | |
943 | if (bus->nodes_modified) { | |
944 | r = 0; | |
945 | goto finish; | |
946 | } | |
992c052c LP |
947 | if (r == 0) |
948 | continue; | |
949 | ||
950 | empty = false; | |
951 | ||
6e8df5f0 LP |
952 | if (c->vtable[0].flags & SD_BUS_VTABLE_HIDDEN) |
953 | continue; | |
954 | ||
718db961 LP |
955 | if (!streq_ptr(previous_interface, c->interface)) { |
956 | ||
957 | if (previous_interface) | |
4b61c875 | 958 | fputs_unlocked(" </interface>\n", intro.f); |
718db961 LP |
959 | |
960 | fprintf(intro.f, " <interface name=\"%s\">\n", c->interface); | |
961 | } | |
962 | ||
963 | r = introspect_write_interface(&intro, c->vtable); | |
992c052c LP |
964 | if (r < 0) |
965 | goto finish; | |
718db961 LP |
966 | |
967 | previous_interface = c->interface; | |
992c052c LP |
968 | } |
969 | ||
718db961 | 970 | if (previous_interface) |
4b61c875 | 971 | fputs_unlocked(" </interface>\n", intro.f); |
718db961 | 972 | |
992c052c LP |
973 | if (empty) { |
974 | /* Nothing?, let's see if we exist at all, and if not | |
975 | * refuse to do anything */ | |
976 | r = bus_node_exists(bus, n, m->path, require_fallback); | |
f2bfc6ba LP |
977 | if (r <= 0) { |
978 | r = bus_maybe_reply_error(m, r, &error); | |
ff02f101 | 979 | goto finish; |
f2bfc6ba | 980 | } |
ff02f101 DH |
981 | if (bus->nodes_modified) { |
982 | r = 0; | |
992c052c | 983 | goto finish; |
ff02f101 | 984 | } |
992c052c LP |
985 | } |
986 | ||
987 | *found_object = true; | |
988 | ||
989 | r = introspect_write_child_nodes(&intro, s, m->path); | |
990 | if (r < 0) | |
991 | goto finish; | |
992 | ||
993 | r = introspect_finish(&intro, bus, m, &reply); | |
994 | if (r < 0) | |
995 | goto finish; | |
996 | ||
997 | r = sd_bus_send(bus, reply, NULL); | |
998 | if (r < 0) | |
999 | goto finish; | |
1000 | ||
1001 | r = 1; | |
1002 | ||
1003 | finish: | |
1004 | introspect_free(&intro); | |
1005 | return r; | |
1006 | } | |
1007 | ||
992c052c LP |
1008 | static int object_manager_serialize_path( |
1009 | sd_bus *bus, | |
1010 | sd_bus_message *reply, | |
1011 | const char *prefix, | |
1012 | const char *path, | |
1013 | bool require_fallback, | |
1014 | sd_bus_error *error) { | |
1015 | ||
718db961 LP |
1016 | const char *previous_interface = NULL; |
1017 | bool found_something = false; | |
992c052c LP |
1018 | struct node_vtable *i; |
1019 | struct node *n; | |
1020 | int r; | |
1021 | ||
1022 | assert(bus); | |
1023 | assert(reply); | |
1024 | assert(prefix); | |
1025 | assert(path); | |
1026 | assert(error); | |
1027 | ||
1028 | n = hashmap_get(bus->nodes, prefix); | |
1029 | if (!n) | |
1030 | return 0; | |
1031 | ||
992c052c | 1032 | LIST_FOREACH(vtables, i, n->vtables) { |
92db139e | 1033 | void *u; |
992c052c LP |
1034 | |
1035 | if (require_fallback && !i->is_fallback) | |
1036 | continue; | |
1037 | ||
f00c3121 | 1038 | r = node_vtable_get_userdata(bus, path, i, &u, error); |
92db139e LP |
1039 | if (r < 0) |
1040 | return r; | |
68313d3d LP |
1041 | if (bus->nodes_modified) |
1042 | return 0; | |
92db139e LP |
1043 | if (r == 0) |
1044 | continue; | |
1045 | ||
1046 | if (!found_something) { | |
718db961 LP |
1047 | |
1048 | /* Open the object part */ | |
1049 | ||
92db139e LP |
1050 | r = sd_bus_message_open_container(reply, 'e', "oa{sa{sv}}"); |
1051 | if (r < 0) | |
1052 | return r; | |
1053 | ||
1054 | r = sd_bus_message_append(reply, "o", path); | |
1055 | if (r < 0) | |
1056 | return r; | |
1057 | ||
1058 | r = sd_bus_message_open_container(reply, 'a', "{sa{sv}}"); | |
1059 | if (r < 0) | |
1060 | return r; | |
1061 | ||
c0e7906d DH |
1062 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Peer", 0); |
1063 | if (r < 0) | |
1064 | return r; | |
1065 | ||
1066 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Introspectable", 0); | |
1067 | if (r < 0) | |
1068 | return r; | |
1069 | ||
1070 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Properties", 0); | |
1071 | if (r < 0) | |
1072 | return r; | |
1073 | ||
1074 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.ObjectManager", 0); | |
1075 | if (r < 0) | |
1076 | return r; | |
1077 | ||
92db139e LP |
1078 | found_something = true; |
1079 | } | |
1080 | ||
718db961 LP |
1081 | if (!streq_ptr(previous_interface, i->interface)) { |
1082 | ||
1083 | /* Maybe close the previous interface part */ | |
1084 | ||
1085 | if (previous_interface) { | |
1086 | r = sd_bus_message_close_container(reply); | |
1087 | if (r < 0) | |
1088 | return r; | |
1089 | ||
1090 | r = sd_bus_message_close_container(reply); | |
1091 | if (r < 0) | |
1092 | return r; | |
1093 | } | |
1094 | ||
1095 | /* Open the new interface part */ | |
1096 | ||
1097 | r = sd_bus_message_open_container(reply, 'e', "sa{sv}"); | |
1098 | if (r < 0) | |
1099 | return r; | |
1100 | ||
1101 | r = sd_bus_message_append(reply, "s", i->interface); | |
1102 | if (r < 0) | |
1103 | return r; | |
1104 | ||
1105 | r = sd_bus_message_open_container(reply, 'a', "{sv}"); | |
1106 | if (r < 0) | |
1107 | return r; | |
1108 | } | |
1109 | ||
1110 | r = vtable_append_all_properties(bus, reply, path, i, u, error); | |
992c052c LP |
1111 | if (r < 0) |
1112 | return r; | |
68313d3d LP |
1113 | if (bus->nodes_modified) |
1114 | return 0; | |
718db961 LP |
1115 | |
1116 | previous_interface = i->interface; | |
1117 | } | |
1118 | ||
1119 | if (previous_interface) { | |
1120 | r = sd_bus_message_close_container(reply); | |
1121 | if (r < 0) | |
1122 | return r; | |
1123 | ||
1124 | r = sd_bus_message_close_container(reply); | |
1125 | if (r < 0) | |
1126 | return r; | |
992c052c LP |
1127 | } |
1128 | ||
92db139e LP |
1129 | if (found_something) { |
1130 | r = sd_bus_message_close_container(reply); | |
1131 | if (r < 0) | |
1132 | return r; | |
992c052c | 1133 | |
92db139e LP |
1134 | r = sd_bus_message_close_container(reply); |
1135 | if (r < 0) | |
1136 | return r; | |
1137 | } | |
992c052c LP |
1138 | |
1139 | return 1; | |
1140 | } | |
1141 | ||
1142 | static int object_manager_serialize_path_and_fallbacks( | |
1143 | sd_bus *bus, | |
1144 | sd_bus_message *reply, | |
1145 | const char *path, | |
1146 | sd_bus_error *error) { | |
1147 | ||
92e189e5 | 1148 | char *prefix; |
992c052c LP |
1149 | int r; |
1150 | ||
1151 | assert(bus); | |
1152 | assert(reply); | |
1153 | assert(path); | |
1154 | assert(error); | |
1155 | ||
1156 | /* First, add all vtables registered for this path */ | |
1157 | r = object_manager_serialize_path(bus, reply, path, path, false, error); | |
1158 | if (r < 0) | |
1159 | return r; | |
68313d3d LP |
1160 | if (bus->nodes_modified) |
1161 | return 0; | |
992c052c LP |
1162 | |
1163 | /* Second, add fallback vtables registered for any of the prefixes */ | |
92e189e5 LP |
1164 | prefix = alloca(strlen(path) + 1); |
1165 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
1166 | r = object_manager_serialize_path(bus, reply, prefix, path, true, error); | |
1167 | if (r < 0) | |
1168 | return r; | |
68313d3d LP |
1169 | if (bus->nodes_modified) |
1170 | return 0; | |
992c052c LP |
1171 | } |
1172 | ||
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | static int process_get_managed_objects( | |
1177 | sd_bus *bus, | |
1178 | sd_bus_message *m, | |
1179 | struct node *n, | |
1180 | bool require_fallback, | |
1181 | bool *found_object) { | |
1182 | ||
4afd3348 LP |
1183 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
1184 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
992c052c | 1185 | _cleanup_set_free_free_ Set *s = NULL; |
943c3f94 DH |
1186 | Iterator i; |
1187 | char *path; | |
992c052c LP |
1188 | int r; |
1189 | ||
1190 | assert(bus); | |
1191 | assert(m); | |
1192 | assert(n); | |
1193 | assert(found_object); | |
1194 | ||
943c3f94 DH |
1195 | /* Spec says, GetManagedObjects() is only implemented on the root of a |
1196 | * sub-tree. Therefore, we require a registered object-manager on | |
1197 | * exactly the queried path, otherwise, we refuse to respond. */ | |
1198 | ||
1199 | if (require_fallback || !n->object_managers) | |
992c052c LP |
1200 | return 0; |
1201 | ||
44eb1add | 1202 | r = get_child_nodes(bus, m->path, n, CHILDREN_RECURSIVE, &s, &error); |
992c052c | 1203 | if (r < 0) |
f2bfc6ba | 1204 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
1205 | if (bus->nodes_modified) |
1206 | return 0; | |
992c052c | 1207 | |
df2d202e | 1208 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
1209 | if (r < 0) |
1210 | return r; | |
1211 | ||
1212 | r = sd_bus_message_open_container(reply, 'a', "{oa{sa{sv}}}"); | |
1213 | if (r < 0) | |
1214 | return r; | |
1215 | ||
943c3f94 DH |
1216 | SET_FOREACH(path, s, i) { |
1217 | r = object_manager_serialize_path_and_fallbacks(bus, reply, path, &error); | |
1218 | if (r < 0) | |
f2bfc6ba | 1219 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 1220 | |
943c3f94 | 1221 | if (bus->nodes_modified) |
992c052c | 1222 | return 0; |
992c052c LP |
1223 | } |
1224 | ||
1225 | r = sd_bus_message_close_container(reply); | |
1226 | if (r < 0) | |
1227 | return r; | |
1228 | ||
1229 | r = sd_bus_send(bus, reply, NULL); | |
1230 | if (r < 0) | |
1231 | return r; | |
1232 | ||
1233 | return 1; | |
1234 | } | |
1235 | ||
1236 | static int object_find_and_run( | |
1237 | sd_bus *bus, | |
1238 | sd_bus_message *m, | |
1239 | const char *p, | |
1240 | bool require_fallback, | |
1241 | bool *found_object) { | |
1242 | ||
1243 | struct node *n; | |
1244 | struct vtable_member vtable_key, *v; | |
1245 | int r; | |
1246 | ||
1247 | assert(bus); | |
1248 | assert(m); | |
1249 | assert(p); | |
1250 | assert(found_object); | |
1251 | ||
1252 | n = hashmap_get(bus->nodes, p); | |
1253 | if (!n) | |
1254 | return 0; | |
1255 | ||
1256 | /* First, try object callbacks */ | |
1257 | r = node_callbacks_run(bus, m, n->callbacks, require_fallback, found_object); | |
1258 | if (r != 0) | |
1259 | return r; | |
68313d3d LP |
1260 | if (bus->nodes_modified) |
1261 | return 0; | |
992c052c LP |
1262 | |
1263 | if (!m->interface || !m->member) | |
1264 | return 0; | |
1265 | ||
1266 | /* Then, look for a known method */ | |
1267 | vtable_key.path = (char*) p; | |
1268 | vtable_key.interface = m->interface; | |
1269 | vtable_key.member = m->member; | |
1270 | ||
1271 | v = hashmap_get(bus->vtable_methods, &vtable_key); | |
1272 | if (v) { | |
1273 | r = method_callbacks_run(bus, m, v, require_fallback, found_object); | |
1274 | if (r != 0) | |
1275 | return r; | |
68313d3d LP |
1276 | if (bus->nodes_modified) |
1277 | return 0; | |
992c052c LP |
1278 | } |
1279 | ||
1280 | /* Then, look for a known property */ | |
1281 | if (streq(m->interface, "org.freedesktop.DBus.Properties")) { | |
1282 | bool get = false; | |
1283 | ||
1284 | get = streq(m->member, "Get"); | |
1285 | ||
1286 | if (get || streq(m->member, "Set")) { | |
1287 | ||
1288 | r = sd_bus_message_rewind(m, true); | |
1289 | if (r < 0) | |
1290 | return r; | |
1291 | ||
1292 | vtable_key.path = (char*) p; | |
1293 | ||
1294 | r = sd_bus_message_read(m, "ss", &vtable_key.interface, &vtable_key.member); | |
1295 | if (r < 0) | |
0fc5ab90 | 1296 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface and member parameters"); |
992c052c LP |
1297 | |
1298 | v = hashmap_get(bus->vtable_properties, &vtable_key); | |
1299 | if (v) { | |
1300 | r = property_get_set_callbacks_run(bus, m, v, require_fallback, get, found_object); | |
1301 | if (r != 0) | |
1302 | return r; | |
1303 | } | |
1304 | ||
1305 | } else if (streq(m->member, "GetAll")) { | |
1306 | const char *iface; | |
1307 | ||
1308 | r = sd_bus_message_rewind(m, true); | |
1309 | if (r < 0) | |
1310 | return r; | |
1311 | ||
1312 | r = sd_bus_message_read(m, "s", &iface); | |
1313 | if (r < 0) | |
0fc5ab90 | 1314 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface parameter"); |
992c052c LP |
1315 | |
1316 | if (iface[0] == 0) | |
1317 | iface = NULL; | |
1318 | ||
1319 | r = property_get_all_callbacks_run(bus, m, n->vtables, require_fallback, iface, found_object); | |
1320 | if (r != 0) | |
1321 | return r; | |
1322 | } | |
1323 | ||
1324 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) { | |
1325 | ||
0fc5ab90 LP |
1326 | if (!isempty(sd_bus_message_get_signature(m, true))) |
1327 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
1328 | ||
992c052c LP |
1329 | r = process_introspect(bus, m, n, require_fallback, found_object); |
1330 | if (r != 0) | |
1331 | return r; | |
1332 | ||
1333 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.ObjectManager", "GetManagedObjects")) { | |
1334 | ||
0fc5ab90 LP |
1335 | if (!isempty(sd_bus_message_get_signature(m, true))) |
1336 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
1337 | ||
992c052c LP |
1338 | r = process_get_managed_objects(bus, m, n, require_fallback, found_object); |
1339 | if (r != 0) | |
1340 | return r; | |
1341 | } | |
1342 | ||
68313d3d LP |
1343 | if (bus->nodes_modified) |
1344 | return 0; | |
1345 | ||
992c052c LP |
1346 | if (!*found_object) { |
1347 | r = bus_node_exists(bus, n, m->path, require_fallback); | |
1348 | if (r < 0) | |
f2bfc6ba | 1349 | return bus_maybe_reply_error(m, r, NULL); |
ff02f101 DH |
1350 | if (bus->nodes_modified) |
1351 | return 0; | |
992c052c LP |
1352 | if (r > 0) |
1353 | *found_object = true; | |
1354 | } | |
1355 | ||
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | int bus_process_object(sd_bus *bus, sd_bus_message *m) { | |
1360 | int r; | |
1361 | size_t pl; | |
1362 | bool found_object = false; | |
1363 | ||
1364 | assert(bus); | |
1365 | assert(m); | |
1366 | ||
09365592 LP |
1367 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1368 | return 0; | |
1369 | ||
40ca29a1 | 1370 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
992c052c LP |
1371 | return 0; |
1372 | ||
992c052c LP |
1373 | if (hashmap_isempty(bus->nodes)) |
1374 | return 0; | |
1375 | ||
f820cf99 LP |
1376 | /* Never respond to broadcast messages */ |
1377 | if (bus->bus_client && !m->destination) | |
1378 | return 0; | |
1379 | ||
adacb957 LP |
1380 | assert(m->path); |
1381 | assert(m->member); | |
1382 | ||
992c052c LP |
1383 | pl = strlen(m->path); |
1384 | do { | |
92e189e5 | 1385 | char prefix[pl+1]; |
992c052c LP |
1386 | |
1387 | bus->nodes_modified = false; | |
1388 | ||
1389 | r = object_find_and_run(bus, m, m->path, false, &found_object); | |
1390 | if (r != 0) | |
1391 | return r; | |
1392 | ||
1393 | /* Look for fallback prefixes */ | |
92e189e5 | 1394 | OBJECT_PATH_FOREACH_PREFIX(prefix, m->path) { |
992c052c LP |
1395 | |
1396 | if (bus->nodes_modified) | |
1397 | break; | |
1398 | ||
92e189e5 | 1399 | r = object_find_and_run(bus, m, prefix, true, &found_object); |
992c052c LP |
1400 | if (r != 0) |
1401 | return r; | |
1402 | } | |
1403 | ||
1404 | } while (bus->nodes_modified); | |
1405 | ||
1406 | if (!found_object) | |
1407 | return 0; | |
1408 | ||
1409 | if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Get") || | |
1410 | sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Set")) | |
1411 | r = sd_bus_reply_method_errorf( | |
df2d202e | 1412 | m, |
40ca29a1 | 1413 | SD_BUS_ERROR_UNKNOWN_PROPERTY, |
992c052c LP |
1414 | "Unknown property or interface."); |
1415 | else | |
1416 | r = sd_bus_reply_method_errorf( | |
df2d202e | 1417 | m, |
40ca29a1 | 1418 | SD_BUS_ERROR_UNKNOWN_METHOD, |
992c052c LP |
1419 | "Unknown method '%s' or interface '%s'.", m->member, m->interface); |
1420 | ||
1421 | if (r < 0) | |
1422 | return r; | |
1423 | ||
1424 | return 1; | |
1425 | } | |
1426 | ||
1427 | static struct node *bus_node_allocate(sd_bus *bus, const char *path) { | |
1428 | struct node *n, *parent; | |
1429 | const char *e; | |
2fd069b1 ZJS |
1430 | _cleanup_free_ char *s = NULL; |
1431 | char *p; | |
992c052c LP |
1432 | int r; |
1433 | ||
1434 | assert(bus); | |
1435 | assert(path); | |
1436 | assert(path[0] == '/'); | |
1437 | ||
1438 | n = hashmap_get(bus->nodes, path); | |
1439 | if (n) | |
1440 | return n; | |
1441 | ||
d5099efc | 1442 | r = hashmap_ensure_allocated(&bus->nodes, &string_hash_ops); |
992c052c LP |
1443 | if (r < 0) |
1444 | return NULL; | |
1445 | ||
1446 | s = strdup(path); | |
1447 | if (!s) | |
1448 | return NULL; | |
1449 | ||
1450 | if (streq(path, "/")) | |
1451 | parent = NULL; | |
1452 | else { | |
1453 | e = strrchr(path, '/'); | |
1454 | assert(e); | |
1455 | ||
7d67077f | 1456 | p = strndupa(path, MAX(1, e - path)); |
992c052c LP |
1457 | |
1458 | parent = bus_node_allocate(bus, p); | |
2fd069b1 | 1459 | if (!parent) |
992c052c | 1460 | return NULL; |
992c052c LP |
1461 | } |
1462 | ||
1463 | n = new0(struct node, 1); | |
1464 | if (!n) | |
1465 | return NULL; | |
1466 | ||
1467 | n->parent = parent; | |
1468 | n->path = s; | |
2fd069b1 | 1469 | s = NULL; /* do not free */ |
992c052c | 1470 | |
8e050193 | 1471 | r = hashmap_put(bus->nodes, n->path, n); |
992c052c | 1472 | if (r < 0) { |
2fd069b1 | 1473 | free(n->path); |
992c052c LP |
1474 | free(n); |
1475 | return NULL; | |
1476 | } | |
1477 | ||
1478 | if (parent) | |
71fda00f | 1479 | LIST_PREPEND(siblings, parent->child, n); |
992c052c LP |
1480 | |
1481 | return n; | |
1482 | } | |
1483 | ||
19befb2d | 1484 | void bus_node_gc(sd_bus *b, struct node *n) { |
992c052c LP |
1485 | assert(b); |
1486 | ||
1487 | if (!n) | |
1488 | return; | |
1489 | ||
1490 | if (n->child || | |
1491 | n->callbacks || | |
1492 | n->vtables || | |
1493 | n->enumerators || | |
19befb2d | 1494 | n->object_managers) |
992c052c LP |
1495 | return; |
1496 | ||
1497 | assert(hashmap_remove(b->nodes, n->path) == n); | |
1498 | ||
1499 | if (n->parent) | |
71fda00f | 1500 | LIST_REMOVE(siblings, n->parent->child, n); |
992c052c LP |
1501 | |
1502 | free(n->path); | |
1503 | bus_node_gc(b, n->parent); | |
1504 | free(n); | |
1505 | } | |
1506 | ||
2d5c8a27 DH |
1507 | static int bus_find_parent_object_manager(sd_bus *bus, struct node **out, const char *path) { |
1508 | struct node *n; | |
1509 | ||
1510 | assert(bus); | |
1511 | assert(path); | |
1512 | ||
1513 | n = hashmap_get(bus->nodes, path); | |
1514 | if (!n) { | |
1515 | char *prefix; | |
1516 | ||
1517 | prefix = alloca(strlen(path) + 1); | |
1518 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
1519 | n = hashmap_get(bus->nodes, prefix); | |
1520 | if (n) | |
1521 | break; | |
1522 | } | |
1523 | } | |
1524 | ||
1525 | while (n && !n->object_managers) | |
1526 | n = n->parent; | |
1527 | ||
1528 | if (out) | |
1529 | *out = n; | |
1530 | return !!n; | |
1531 | } | |
1532 | ||
992c052c | 1533 | static int bus_add_object( |
dfa92725 | 1534 | sd_bus *bus, |
19befb2d | 1535 | sd_bus_slot **slot, |
992c052c LP |
1536 | bool fallback, |
1537 | const char *path, | |
1538 | sd_bus_message_handler_t callback, | |
1539 | void *userdata) { | |
1540 | ||
19befb2d | 1541 | sd_bus_slot *s; |
992c052c LP |
1542 | struct node *n; |
1543 | int r; | |
1544 | ||
dfa92725 LP |
1545 | assert_return(bus, -EINVAL); |
1546 | assert_return(object_path_is_valid(path), -EINVAL); | |
1547 | assert_return(callback, -EINVAL); | |
1548 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c | 1549 | |
dfa92725 | 1550 | n = bus_node_allocate(bus, path); |
992c052c LP |
1551 | if (!n) |
1552 | return -ENOMEM; | |
1553 | ||
19befb2d LP |
1554 | s = bus_slot_allocate(bus, !slot, BUS_NODE_CALLBACK, sizeof(struct node_callback), userdata); |
1555 | if (!s) { | |
992c052c LP |
1556 | r = -ENOMEM; |
1557 | goto fail; | |
1558 | } | |
1559 | ||
19befb2d LP |
1560 | s->node_callback.callback = callback; |
1561 | s->node_callback.is_fallback = fallback; | |
992c052c | 1562 | |
19befb2d LP |
1563 | s->node_callback.node = n; |
1564 | LIST_PREPEND(callbacks, n->callbacks, &s->node_callback); | |
68313d3d LP |
1565 | bus->nodes_modified = true; |
1566 | ||
19befb2d LP |
1567 | if (slot) |
1568 | *slot = s; | |
1569 | ||
992c052c LP |
1570 | return 0; |
1571 | ||
1572 | fail: | |
19befb2d | 1573 | sd_bus_slot_unref(s); |
dfa92725 | 1574 | bus_node_gc(bus, n); |
19befb2d | 1575 | |
992c052c LP |
1576 | return r; |
1577 | } | |
1578 | ||
19befb2d | 1579 | _public_ int sd_bus_add_object( |
992c052c | 1580 | sd_bus *bus, |
19befb2d | 1581 | sd_bus_slot **slot, |
992c052c LP |
1582 | const char *path, |
1583 | sd_bus_message_handler_t callback, | |
1584 | void *userdata) { | |
1585 | ||
19befb2d | 1586 | return bus_add_object(bus, slot, false, path, callback, userdata); |
992c052c LP |
1587 | } |
1588 | ||
19befb2d LP |
1589 | _public_ int sd_bus_add_fallback( |
1590 | sd_bus *bus, | |
1591 | sd_bus_slot **slot, | |
1592 | const char *prefix, | |
1593 | sd_bus_message_handler_t callback, | |
1594 | void *userdata) { | |
992c052c | 1595 | |
19befb2d | 1596 | return bus_add_object(bus, slot, true, prefix, callback, userdata); |
992c052c LP |
1597 | } |
1598 | ||
b826ab58 | 1599 | static void vtable_member_hash_func(const void *a, struct siphash *state) { |
992c052c LP |
1600 | const struct vtable_member *m = a; |
1601 | ||
dfa92725 LP |
1602 | assert(m); |
1603 | ||
b826ab58 TG |
1604 | string_hash_func(m->path, state); |
1605 | string_hash_func(m->interface, state); | |
1606 | string_hash_func(m->member, state); | |
992c052c LP |
1607 | } |
1608 | ||
1609 | static int vtable_member_compare_func(const void *a, const void *b) { | |
1610 | const struct vtable_member *x = a, *y = b; | |
1611 | int r; | |
1612 | ||
dfa92725 LP |
1613 | assert(x); |
1614 | assert(y); | |
1615 | ||
992c052c LP |
1616 | r = strcmp(x->path, y->path); |
1617 | if (r != 0) | |
1618 | return r; | |
1619 | ||
1620 | r = strcmp(x->interface, y->interface); | |
1621 | if (r != 0) | |
1622 | return r; | |
1623 | ||
1624 | return strcmp(x->member, y->member); | |
1625 | } | |
1626 | ||
d5099efc MS |
1627 | static const struct hash_ops vtable_member_hash_ops = { |
1628 | .hash = vtable_member_hash_func, | |
1629 | .compare = vtable_member_compare_func | |
1630 | }; | |
1631 | ||
992c052c LP |
1632 | static int add_object_vtable_internal( |
1633 | sd_bus *bus, | |
19befb2d | 1634 | sd_bus_slot **slot, |
992c052c LP |
1635 | const char *path, |
1636 | const char *interface, | |
1637 | const sd_bus_vtable *vtable, | |
1638 | bool fallback, | |
1639 | sd_bus_object_find_t find, | |
1640 | void *userdata) { | |
1641 | ||
2915234d | 1642 | sd_bus_slot *s = NULL; |
19befb2d | 1643 | struct node_vtable *i, *existing = NULL; |
992c052c LP |
1644 | const sd_bus_vtable *v; |
1645 | struct node *n; | |
1646 | int r; | |
1647 | ||
dfa92725 LP |
1648 | assert_return(bus, -EINVAL); |
1649 | assert_return(object_path_is_valid(path), -EINVAL); | |
1650 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
1651 | assert_return(vtable, -EINVAL); | |
1652 | assert_return(vtable[0].type == _SD_BUS_VTABLE_START, -EINVAL); | |
1653 | assert_return(vtable[0].x.start.element_size == sizeof(struct sd_bus_vtable), -EINVAL); | |
1654 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
718db961 LP |
1655 | assert_return(!streq(interface, "org.freedesktop.DBus.Properties") && |
1656 | !streq(interface, "org.freedesktop.DBus.Introspectable") && | |
1657 | !streq(interface, "org.freedesktop.DBus.Peer") && | |
1658 | !streq(interface, "org.freedesktop.DBus.ObjectManager"), -EINVAL); | |
992c052c | 1659 | |
d5099efc | 1660 | r = hashmap_ensure_allocated(&bus->vtable_methods, &vtable_member_hash_ops); |
992c052c LP |
1661 | if (r < 0) |
1662 | return r; | |
1663 | ||
d5099efc | 1664 | r = hashmap_ensure_allocated(&bus->vtable_properties, &vtable_member_hash_ops); |
992c052c LP |
1665 | if (r < 0) |
1666 | return r; | |
1667 | ||
1668 | n = bus_node_allocate(bus, path); | |
1669 | if (!n) | |
1670 | return -ENOMEM; | |
1671 | ||
1672 | LIST_FOREACH(vtables, i, n->vtables) { | |
992c052c LP |
1673 | if (i->is_fallback != fallback) { |
1674 | r = -EPROTOTYPE; | |
1675 | goto fail; | |
1676 | } | |
718db961 LP |
1677 | |
1678 | if (streq(i->interface, interface)) { | |
1679 | ||
1680 | if (i->vtable == vtable) { | |
1681 | r = -EEXIST; | |
1682 | goto fail; | |
1683 | } | |
1684 | ||
1685 | existing = i; | |
1686 | } | |
992c052c LP |
1687 | } |
1688 | ||
19befb2d LP |
1689 | s = bus_slot_allocate(bus, !slot, BUS_NODE_VTABLE, sizeof(struct node_vtable), userdata); |
1690 | if (!s) { | |
992c052c LP |
1691 | r = -ENOMEM; |
1692 | goto fail; | |
1693 | } | |
1694 | ||
19befb2d LP |
1695 | s->node_vtable.is_fallback = fallback; |
1696 | s->node_vtable.vtable = vtable; | |
1697 | s->node_vtable.find = find; | |
992c052c | 1698 | |
19befb2d LP |
1699 | s->node_vtable.interface = strdup(interface); |
1700 | if (!s->node_vtable.interface) { | |
992c052c LP |
1701 | r = -ENOMEM; |
1702 | goto fail; | |
1703 | } | |
1704 | ||
19befb2d | 1705 | for (v = s->node_vtable.vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
992c052c LP |
1706 | |
1707 | switch (v->type) { | |
1708 | ||
1709 | case _SD_BUS_VTABLE_METHOD: { | |
1710 | struct vtable_member *m; | |
1711 | ||
77a874a3 LP |
1712 | if (!member_name_is_valid(v->x.method.member) || |
1713 | !signature_is_valid(strempty(v->x.method.signature), false) || | |
1714 | !signature_is_valid(strempty(v->x.method.result), false) || | |
1715 | !(v->x.method.handler || (isempty(v->x.method.signature) && isempty(v->x.method.result))) || | |
df98a87b | 1716 | v->flags & (SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) { |
992c052c LP |
1717 | r = -EINVAL; |
1718 | goto fail; | |
1719 | } | |
1720 | ||
1721 | m = new0(struct vtable_member, 1); | |
1722 | if (!m) { | |
1723 | r = -ENOMEM; | |
1724 | goto fail; | |
1725 | } | |
1726 | ||
19befb2d | 1727 | m->parent = &s->node_vtable; |
992c052c | 1728 | m->path = n->path; |
19befb2d | 1729 | m->interface = s->node_vtable.interface; |
77a874a3 | 1730 | m->member = v->x.method.member; |
992c052c LP |
1731 | m->vtable = v; |
1732 | ||
1733 | r = hashmap_put(bus->vtable_methods, m, m); | |
1734 | if (r < 0) { | |
1735 | free(m); | |
1736 | goto fail; | |
1737 | } | |
1738 | ||
1739 | break; | |
1740 | } | |
1741 | ||
1742 | case _SD_BUS_VTABLE_WRITABLE_PROPERTY: | |
1743 | ||
77a874a3 | 1744 | if (!(v->x.property.set || bus_type_is_basic(v->x.property.signature[0]))) { |
992c052c LP |
1745 | r = -EINVAL; |
1746 | goto fail; | |
1747 | } | |
9b772efb LP |
1748 | |
1749 | if (v->flags & SD_BUS_VTABLE_PROPERTY_CONST) { | |
1750 | r = -EINVAL; | |
1751 | goto fail; | |
1752 | } | |
992c052c LP |
1753 | |
1754 | /* Fall through */ | |
1755 | ||
1756 | case _SD_BUS_VTABLE_PROPERTY: { | |
1757 | struct vtable_member *m; | |
1758 | ||
77a874a3 LP |
1759 | if (!member_name_is_valid(v->x.property.member) || |
1760 | !signature_is_single(v->x.property.signature, false) || | |
c13c7de3 | 1761 | !(v->x.property.get || bus_type_is_basic(v->x.property.signature[0]) || streq(v->x.property.signature, "as")) || |
33702051 | 1762 | (v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY) || |
df98a87b | 1763 | (!!(v->flags & SD_BUS_VTABLE_PROPERTY_CONST) + !!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) + !!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) > 1 || |
33702051 | 1764 | ((v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) && (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT)) || |
adacb957 | 1765 | (v->flags & SD_BUS_VTABLE_UNPRIVILEGED && v->type == _SD_BUS_VTABLE_PROPERTY)) { |
992c052c LP |
1766 | r = -EINVAL; |
1767 | goto fail; | |
1768 | } | |
1769 | ||
992c052c LP |
1770 | m = new0(struct vtable_member, 1); |
1771 | if (!m) { | |
1772 | r = -ENOMEM; | |
1773 | goto fail; | |
1774 | } | |
1775 | ||
19befb2d | 1776 | m->parent = &s->node_vtable; |
992c052c | 1777 | m->path = n->path; |
19befb2d | 1778 | m->interface = s->node_vtable.interface; |
77a874a3 | 1779 | m->member = v->x.property.member; |
992c052c LP |
1780 | m->vtable = v; |
1781 | ||
1782 | r = hashmap_put(bus->vtable_properties, m, m); | |
1783 | if (r < 0) { | |
1784 | free(m); | |
1785 | goto fail; | |
1786 | } | |
1787 | ||
1788 | break; | |
1789 | } | |
1790 | ||
1791 | case _SD_BUS_VTABLE_SIGNAL: | |
1792 | ||
77a874a3 | 1793 | if (!member_name_is_valid(v->x.signal.member) || |
adacb957 LP |
1794 | !signature_is_valid(strempty(v->x.signal.signature), false) || |
1795 | v->flags & SD_BUS_VTABLE_UNPRIVILEGED) { | |
992c052c LP |
1796 | r = -EINVAL; |
1797 | goto fail; | |
1798 | } | |
1799 | ||
1800 | break; | |
1801 | ||
1802 | default: | |
1803 | r = -EINVAL; | |
1804 | goto fail; | |
1805 | } | |
1806 | } | |
1807 | ||
19befb2d LP |
1808 | s->node_vtable.node = n; |
1809 | LIST_INSERT_AFTER(vtables, n->vtables, existing, &s->node_vtable); | |
68313d3d LP |
1810 | bus->nodes_modified = true; |
1811 | ||
19befb2d LP |
1812 | if (slot) |
1813 | *slot = s; | |
1814 | ||
992c052c LP |
1815 | return 0; |
1816 | ||
1817 | fail: | |
19befb2d | 1818 | sd_bus_slot_unref(s); |
dfa92725 LP |
1819 | bus_node_gc(bus, n); |
1820 | ||
19befb2d | 1821 | return r; |
992c052c LP |
1822 | } |
1823 | ||
d9f644e2 | 1824 | _public_ int sd_bus_add_object_vtable( |
992c052c | 1825 | sd_bus *bus, |
19befb2d | 1826 | sd_bus_slot **slot, |
992c052c LP |
1827 | const char *path, |
1828 | const char *interface, | |
1829 | const sd_bus_vtable *vtable, | |
1830 | void *userdata) { | |
1831 | ||
19befb2d | 1832 | return add_object_vtable_internal(bus, slot, path, interface, vtable, false, NULL, userdata); |
992c052c LP |
1833 | } |
1834 | ||
d9f644e2 | 1835 | _public_ int sd_bus_add_fallback_vtable( |
992c052c | 1836 | sd_bus *bus, |
19befb2d LP |
1837 | sd_bus_slot **slot, |
1838 | const char *prefix, | |
718db961 LP |
1839 | const char *interface, |
1840 | const sd_bus_vtable *vtable, | |
1841 | sd_bus_object_find_t find, | |
1842 | void *userdata) { | |
992c052c | 1843 | |
19befb2d | 1844 | return add_object_vtable_internal(bus, slot, prefix, interface, vtable, true, find, userdata); |
992c052c LP |
1845 | } |
1846 | ||
d9f644e2 | 1847 | _public_ int sd_bus_add_node_enumerator( |
992c052c | 1848 | sd_bus *bus, |
19befb2d | 1849 | sd_bus_slot **slot, |
992c052c LP |
1850 | const char *path, |
1851 | sd_bus_node_enumerator_t callback, | |
1852 | void *userdata) { | |
1853 | ||
19befb2d | 1854 | sd_bus_slot *s; |
992c052c LP |
1855 | struct node *n; |
1856 | int r; | |
1857 | ||
dfa92725 LP |
1858 | assert_return(bus, -EINVAL); |
1859 | assert_return(object_path_is_valid(path), -EINVAL); | |
1860 | assert_return(callback, -EINVAL); | |
1861 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c LP |
1862 | |
1863 | n = bus_node_allocate(bus, path); | |
1864 | if (!n) | |
1865 | return -ENOMEM; | |
1866 | ||
19befb2d LP |
1867 | s = bus_slot_allocate(bus, !slot, BUS_NODE_ENUMERATOR, sizeof(struct node_enumerator), userdata); |
1868 | if (!s) { | |
992c052c LP |
1869 | r = -ENOMEM; |
1870 | goto fail; | |
1871 | } | |
1872 | ||
19befb2d | 1873 | s->node_enumerator.callback = callback; |
68313d3d | 1874 | |
19befb2d LP |
1875 | s->node_enumerator.node = n; |
1876 | LIST_PREPEND(enumerators, n->enumerators, &s->node_enumerator); | |
68313d3d LP |
1877 | bus->nodes_modified = true; |
1878 | ||
19befb2d LP |
1879 | if (slot) |
1880 | *slot = s; | |
1881 | ||
992c052c LP |
1882 | return 0; |
1883 | ||
1884 | fail: | |
19befb2d | 1885 | sd_bus_slot_unref(s); |
992c052c LP |
1886 | bus_node_gc(bus, n); |
1887 | ||
19befb2d | 1888 | return r; |
992c052c LP |
1889 | } |
1890 | ||
1891 | static int emit_properties_changed_on_interface( | |
1892 | sd_bus *bus, | |
1893 | const char *prefix, | |
1894 | const char *path, | |
1895 | const char *interface, | |
1896 | bool require_fallback, | |
46525bfc | 1897 | bool *found_interface, |
992c052c LP |
1898 | char **names) { |
1899 | ||
4afd3348 LP |
1900 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
1901 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
718db961 LP |
1902 | bool has_invalidating = false, has_changing = false; |
1903 | struct vtable_member key = {}; | |
992c052c LP |
1904 | struct node_vtable *c; |
1905 | struct node *n; | |
1906 | char **property; | |
1907 | void *u = NULL; | |
1908 | int r; | |
1909 | ||
1910 | assert(bus); | |
dfa92725 | 1911 | assert(prefix); |
992c052c LP |
1912 | assert(path); |
1913 | assert(interface); | |
46525bfc | 1914 | assert(found_interface); |
992c052c LP |
1915 | |
1916 | n = hashmap_get(bus->nodes, prefix); | |
1917 | if (!n) | |
1918 | return 0; | |
1919 | ||
151b9b96 | 1920 | r = sd_bus_message_new_signal(bus, &m, path, "org.freedesktop.DBus.Properties", "PropertiesChanged"); |
992c052c LP |
1921 | if (r < 0) |
1922 | return r; | |
1923 | ||
1924 | r = sd_bus_message_append(m, "s", interface); | |
1925 | if (r < 0) | |
1926 | return r; | |
1927 | ||
1928 | r = sd_bus_message_open_container(m, 'a', "{sv}"); | |
1929 | if (r < 0) | |
1930 | return r; | |
1931 | ||
1932 | key.path = prefix; | |
1933 | key.interface = interface; | |
1934 | ||
718db961 LP |
1935 | LIST_FOREACH(vtables, c, n->vtables) { |
1936 | if (require_fallback && !c->is_fallback) | |
1937 | continue; | |
992c052c | 1938 | |
718db961 | 1939 | if (!streq(c->interface, interface)) |
992c052c | 1940 | continue; |
992c052c | 1941 | |
f00c3121 | 1942 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
992c052c LP |
1943 | if (r < 0) |
1944 | return r; | |
718db961 LP |
1945 | if (bus->nodes_modified) |
1946 | return 0; | |
1947 | if (r == 0) | |
1948 | continue; | |
992c052c | 1949 | |
46525bfc LP |
1950 | *found_interface = true; |
1951 | ||
a03e4337 LP |
1952 | if (names) { |
1953 | /* If the caller specified a list of | |
1954 | * properties we include exactly those in the | |
1955 | * PropertiesChanged message */ | |
992c052c | 1956 | |
a03e4337 LP |
1957 | STRV_FOREACH(property, names) { |
1958 | struct vtable_member *v; | |
992c052c | 1959 | |
a03e4337 | 1960 | assert_return(member_name_is_valid(*property), -EINVAL); |
718db961 | 1961 | |
a03e4337 LP |
1962 | key.member = *property; |
1963 | v = hashmap_get(bus->vtable_properties, &key); | |
1964 | if (!v) | |
1965 | return -ENOENT; | |
1966 | ||
1967 | /* If there are two vtables for the same | |
1968 | * interface, let's handle this property when | |
1969 | * we come to that vtable. */ | |
1970 | if (c != v->parent) | |
1971 | continue; | |
992c052c | 1972 | |
a03e4337 LP |
1973 | assert_return(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE || |
1974 | v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION, -EDOM); | |
992c052c | 1975 | |
a03e4337 LP |
1976 | assert_return(!(v->vtable->flags & SD_BUS_VTABLE_HIDDEN), -EDOM); |
1977 | ||
1978 | if (v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) { | |
1979 | has_invalidating = true; | |
1980 | continue; | |
1981 | } | |
1982 | ||
1983 | has_changing = true; | |
1984 | ||
1985 | r = vtable_append_one_property(bus, m, m->path, c, v->vtable, u, &error); | |
1986 | if (r < 0) | |
1987 | return r; | |
1988 | if (bus->nodes_modified) | |
1989 | return 0; | |
718db961 | 1990 | } |
a03e4337 LP |
1991 | } else { |
1992 | const sd_bus_vtable *v; | |
718db961 | 1993 | |
a03e4337 LP |
1994 | /* If the caller specified no properties list |
1995 | * we include all properties that are marked | |
1996 | * as changing in the message. */ | |
718db961 | 1997 | |
a03e4337 LP |
1998 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
1999 | if (v->type != _SD_BUS_VTABLE_PROPERTY && v->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) | |
2000 | continue; | |
718db961 | 2001 | |
a03e4337 LP |
2002 | if (v->flags & SD_BUS_VTABLE_HIDDEN) |
2003 | continue; | |
718db961 | 2004 | |
a03e4337 LP |
2005 | if (v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) { |
2006 | has_invalidating = true; | |
2007 | continue; | |
2008 | } | |
718db961 | 2009 | |
a03e4337 LP |
2010 | if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE)) |
2011 | continue; | |
718db961 | 2012 | |
a03e4337 | 2013 | has_changing = true; |
718db961 | 2014 | |
a03e4337 LP |
2015 | r = vtable_append_one_property(bus, m, m->path, c, v, u, &error); |
2016 | if (r < 0) | |
2017 | return r; | |
2018 | if (bus->nodes_modified) | |
2019 | return 0; | |
2020 | } | |
718db961 | 2021 | } |
992c052c LP |
2022 | } |
2023 | ||
718db961 LP |
2024 | if (!has_invalidating && !has_changing) |
2025 | return 0; | |
2026 | ||
992c052c LP |
2027 | r = sd_bus_message_close_container(m); |
2028 | if (r < 0) | |
2029 | return r; | |
2030 | ||
2031 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2032 | if (r < 0) | |
2033 | return r; | |
2034 | ||
2035 | if (has_invalidating) { | |
718db961 LP |
2036 | LIST_FOREACH(vtables, c, n->vtables) { |
2037 | if (require_fallback && !c->is_fallback) | |
2038 | continue; | |
992c052c | 2039 | |
718db961 | 2040 | if (!streq(c->interface, interface)) |
992c052c LP |
2041 | continue; |
2042 | ||
f00c3121 | 2043 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
992c052c LP |
2044 | if (r < 0) |
2045 | return r; | |
718db961 LP |
2046 | if (bus->nodes_modified) |
2047 | return 0; | |
2048 | if (r == 0) | |
2049 | continue; | |
2050 | ||
a03e4337 LP |
2051 | if (names) { |
2052 | STRV_FOREACH(property, names) { | |
2053 | struct vtable_member *v; | |
718db961 | 2054 | |
a03e4337 LP |
2055 | key.member = *property; |
2056 | assert_se(v = hashmap_get(bus->vtable_properties, &key)); | |
2057 | assert(c == v->parent); | |
718db961 | 2058 | |
a03e4337 LP |
2059 | if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) |
2060 | continue; | |
718db961 | 2061 | |
a03e4337 LP |
2062 | r = sd_bus_message_append(m, "s", *property); |
2063 | if (r < 0) | |
2064 | return r; | |
2065 | } | |
2066 | } else { | |
2067 | const sd_bus_vtable *v; | |
2068 | ||
2069 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { | |
2070 | if (v->type != _SD_BUS_VTABLE_PROPERTY && v->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) | |
2071 | continue; | |
2072 | ||
2073 | if (v->flags & SD_BUS_VTABLE_HIDDEN) | |
2074 | continue; | |
2075 | ||
2076 | if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) | |
2077 | continue; | |
2078 | ||
2079 | r = sd_bus_message_append(m, "s", v->x.property.member); | |
2080 | if (r < 0) | |
2081 | return r; | |
2082 | } | |
718db961 | 2083 | } |
992c052c LP |
2084 | } |
2085 | } | |
2086 | ||
2087 | r = sd_bus_message_close_container(m); | |
2088 | if (r < 0) | |
2089 | return r; | |
2090 | ||
2091 | r = sd_bus_send(bus, m, NULL); | |
2092 | if (r < 0) | |
2093 | return r; | |
2094 | ||
2095 | return 1; | |
2096 | } | |
2097 | ||
d9f644e2 | 2098 | _public_ int sd_bus_emit_properties_changed_strv( |
dfa92725 LP |
2099 | sd_bus *bus, |
2100 | const char *path, | |
2101 | const char *interface, | |
2102 | char **names) { | |
2103 | ||
8ce2afd6 | 2104 | BUS_DONT_DESTROY(bus); |
46525bfc | 2105 | bool found_interface = false; |
92e189e5 | 2106 | char *prefix; |
992c052c LP |
2107 | int r; |
2108 | ||
dfa92725 LP |
2109 | assert_return(bus, -EINVAL); |
2110 | assert_return(object_path_is_valid(path), -EINVAL); | |
2111 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
dfa92725 LP |
2112 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2113 | ||
a3d59cd1 LP |
2114 | if (!BUS_IS_OPEN(bus->state)) |
2115 | return -ENOTCONN; | |
a03e4337 LP |
2116 | |
2117 | /* A non-NULL but empty names list means nothing needs to be | |
2118 | generated. A NULL list OTOH indicates that all properties | |
2119 | that are set to EMITS_CHANGE or EMITS_INVALIDATION shall be | |
2120 | included in the PropertiesChanged message. */ | |
2121 | if (names && names[0] == NULL) | |
dfa92725 | 2122 | return 0; |
992c052c | 2123 | |
68313d3d LP |
2124 | do { |
2125 | bus->nodes_modified = false; | |
992c052c | 2126 | |
46525bfc | 2127 | r = emit_properties_changed_on_interface(bus, path, path, interface, false, &found_interface, names); |
92e189e5 LP |
2128 | if (r != 0) |
2129 | return r; | |
68313d3d LP |
2130 | if (bus->nodes_modified) |
2131 | continue; | |
2132 | ||
2133 | prefix = alloca(strlen(path) + 1); | |
2134 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
46525bfc | 2135 | r = emit_properties_changed_on_interface(bus, prefix, path, interface, true, &found_interface, names); |
68313d3d LP |
2136 | if (r != 0) |
2137 | return r; | |
2138 | if (bus->nodes_modified) | |
2139 | break; | |
2140 | } | |
2141 | ||
2142 | } while (bus->nodes_modified); | |
992c052c | 2143 | |
46525bfc | 2144 | return found_interface ? 0 : -ENOENT; |
992c052c LP |
2145 | } |
2146 | ||
d9f644e2 | 2147 | _public_ int sd_bus_emit_properties_changed( |
dfa92725 LP |
2148 | sd_bus *bus, |
2149 | const char *path, | |
2150 | const char *interface, | |
2151 | const char *name, ...) { | |
2152 | ||
250a918d | 2153 | char **names; |
992c052c | 2154 | |
dfa92725 LP |
2155 | assert_return(bus, -EINVAL); |
2156 | assert_return(object_path_is_valid(path), -EINVAL); | |
2157 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
dfa92725 LP |
2158 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2159 | ||
a3d59cd1 LP |
2160 | if (!BUS_IS_OPEN(bus->state)) |
2161 | return -ENOTCONN; | |
2162 | ||
dfa92725 LP |
2163 | if (!name) |
2164 | return 0; | |
2165 | ||
250a918d | 2166 | names = strv_from_stdarg_alloca(name); |
992c052c LP |
2167 | |
2168 | return sd_bus_emit_properties_changed_strv(bus, path, interface, names); | |
2169 | } | |
2170 | ||
d95eb43e DH |
2171 | static int object_added_append_all_prefix( |
2172 | sd_bus *bus, | |
2173 | sd_bus_message *m, | |
2174 | Set *s, | |
2175 | const char *prefix, | |
2176 | const char *path, | |
2177 | bool require_fallback) { | |
2178 | ||
2179 | const char *previous_interface = NULL; | |
2180 | struct node_vtable *c; | |
2181 | struct node *n; | |
2182 | int r; | |
2183 | ||
2184 | assert(bus); | |
2185 | assert(m); | |
2186 | assert(s); | |
2187 | assert(prefix); | |
2188 | assert(path); | |
2189 | ||
2190 | n = hashmap_get(bus->nodes, prefix); | |
2191 | if (!n) | |
2192 | return 0; | |
2193 | ||
2194 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 2195 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
d95eb43e DH |
2196 | void *u = NULL; |
2197 | ||
2198 | if (require_fallback && !c->is_fallback) | |
2199 | continue; | |
2200 | ||
2201 | r = node_vtable_get_userdata(bus, path, c, &u, &error); | |
2202 | if (r < 0) | |
2203 | return r; | |
2204 | if (bus->nodes_modified) | |
2205 | return 0; | |
2206 | if (r == 0) | |
2207 | continue; | |
2208 | ||
2209 | if (!streq_ptr(c->interface, previous_interface)) { | |
2210 | /* If a child-node already handled this interface, we | |
2211 | * skip it on any of its parents. The child vtables | |
2212 | * always fully override any conflicting vtables of | |
2213 | * any parent node. */ | |
2214 | if (set_get(s, c->interface)) | |
2215 | continue; | |
2216 | ||
2217 | r = set_put(s, c->interface); | |
2218 | if (r < 0) | |
2219 | return r; | |
2220 | ||
2221 | if (previous_interface) { | |
2222 | r = sd_bus_message_close_container(m); | |
2223 | if (r < 0) | |
2224 | return r; | |
2225 | r = sd_bus_message_close_container(m); | |
2226 | if (r < 0) | |
2227 | return r; | |
2228 | } | |
2229 | ||
2230 | r = sd_bus_message_open_container(m, 'e', "sa{sv}"); | |
2231 | if (r < 0) | |
2232 | return r; | |
2233 | r = sd_bus_message_append(m, "s", c->interface); | |
2234 | if (r < 0) | |
2235 | return r; | |
2236 | r = sd_bus_message_open_container(m, 'a', "{sv}"); | |
2237 | if (r < 0) | |
2238 | return r; | |
2239 | ||
2240 | previous_interface = c->interface; | |
2241 | } | |
2242 | ||
2243 | r = vtable_append_all_properties(bus, m, path, c, u, &error); | |
2244 | if (r < 0) | |
2245 | return r; | |
2246 | if (bus->nodes_modified) | |
2247 | return 0; | |
2248 | } | |
2249 | ||
2250 | if (previous_interface) { | |
2251 | r = sd_bus_message_close_container(m); | |
2252 | if (r < 0) | |
2253 | return r; | |
2254 | r = sd_bus_message_close_container(m); | |
2255 | if (r < 0) | |
2256 | return r; | |
2257 | } | |
2258 | ||
2259 | return 0; | |
2260 | } | |
2261 | ||
2262 | static int object_added_append_all(sd_bus *bus, sd_bus_message *m, const char *path) { | |
2263 | _cleanup_set_free_ Set *s = NULL; | |
2264 | char *prefix; | |
2265 | int r; | |
2266 | ||
2267 | assert(bus); | |
2268 | assert(m); | |
2269 | assert(path); | |
2270 | ||
2271 | /* | |
2272 | * This appends all interfaces registered on path @path. We first add | |
2273 | * the builtin interfaces, which are always available and handled by | |
2274 | * sd-bus. Then, we add all interfaces registered on the exact node, | |
2275 | * followed by all fallback interfaces registered on any parent prefix. | |
2276 | * | |
2277 | * If an interface is registered multiple times on the same node with | |
2278 | * different vtables, we merge all the properties across all vtables. | |
2279 | * However, if a child node has the same interface registered as one of | |
2280 | * its parent nodes has as fallback, we make the child overwrite the | |
2281 | * parent instead of extending it. Therefore, we keep a "Set" of all | |
2282 | * handled interfaces during parent traversal, so we skip interfaces on | |
2283 | * a parent that were overwritten by a child. | |
2284 | */ | |
2285 | ||
2286 | s = set_new(&string_hash_ops); | |
2287 | if (!s) | |
2288 | return -ENOMEM; | |
2289 | ||
2290 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Peer", 0); | |
2291 | if (r < 0) | |
2292 | return r; | |
2293 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Introspectable", 0); | |
2294 | if (r < 0) | |
2295 | return r; | |
2296 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Properties", 0); | |
2297 | if (r < 0) | |
2298 | return r; | |
2299 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.ObjectManager", 0); | |
2300 | if (r < 0) | |
2301 | return r; | |
2302 | ||
2303 | r = object_added_append_all_prefix(bus, m, s, path, path, false); | |
2304 | if (r < 0) | |
2305 | return r; | |
2306 | if (bus->nodes_modified) | |
2307 | return 0; | |
2308 | ||
2309 | prefix = alloca(strlen(path) + 1); | |
2310 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2311 | r = object_added_append_all_prefix(bus, m, s, prefix, path, true); | |
2312 | if (r < 0) | |
2313 | return r; | |
2314 | if (bus->nodes_modified) | |
2315 | return 0; | |
2316 | } | |
2317 | ||
2318 | return 0; | |
2319 | } | |
2320 | ||
969a9685 | 2321 | _public_ int sd_bus_emit_object_added(sd_bus *bus, const char *path) { |
d95eb43e DH |
2322 | BUS_DONT_DESTROY(bus); |
2323 | ||
4afd3348 | 2324 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2325 | struct node *object_manager; |
d95eb43e DH |
2326 | int r; |
2327 | ||
2328 | /* | |
2329 | * This emits an InterfacesAdded signal on the given path, by iterating | |
2330 | * all registered vtables and fallback vtables on the path. All | |
2331 | * properties are queried and included in the signal. | |
2332 | * This call is equivalent to sd_bus_emit_interfaces_added() with an | |
2333 | * explicit list of registered interfaces. However, unlike | |
2334 | * interfaces_added(), this call can figure out the list of supported | |
2335 | * interfaces itself. Furthermore, it properly adds the builtin | |
2336 | * org.freedesktop.DBus.* interfaces. | |
2337 | */ | |
2338 | ||
2339 | assert_return(bus, -EINVAL); | |
2340 | assert_return(object_path_is_valid(path), -EINVAL); | |
2341 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2342 | ||
2343 | if (!BUS_IS_OPEN(bus->state)) | |
2344 | return -ENOTCONN; | |
2345 | ||
2d5c8a27 DH |
2346 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2347 | if (r < 0) | |
2348 | return r; | |
2349 | if (r == 0) | |
2350 | return -ESRCH; | |
2351 | ||
d95eb43e DH |
2352 | do { |
2353 | bus->nodes_modified = false; | |
2354 | m = sd_bus_message_unref(m); | |
2355 | ||
2d5c8a27 | 2356 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded"); |
d95eb43e DH |
2357 | if (r < 0) |
2358 | return r; | |
2359 | ||
2360 | r = sd_bus_message_append_basic(m, 'o', path); | |
2361 | if (r < 0) | |
2362 | return r; | |
2363 | ||
2364 | r = sd_bus_message_open_container(m, 'a', "{sa{sv}}"); | |
2365 | if (r < 0) | |
2366 | return r; | |
2367 | ||
2368 | r = object_added_append_all(bus, m, path); | |
2369 | if (r < 0) | |
2370 | return r; | |
2371 | ||
2372 | if (bus->nodes_modified) | |
2373 | continue; | |
2374 | ||
2375 | r = sd_bus_message_close_container(m); | |
2376 | if (r < 0) | |
2377 | return r; | |
2378 | ||
2379 | } while (bus->nodes_modified); | |
2380 | ||
2381 | return sd_bus_send(bus, m, NULL); | |
2382 | } | |
2383 | ||
2384 | static int object_removed_append_all_prefix( | |
2385 | sd_bus *bus, | |
2386 | sd_bus_message *m, | |
2387 | Set *s, | |
2388 | const char *prefix, | |
2389 | const char *path, | |
2390 | bool require_fallback) { | |
2391 | ||
2392 | const char *previous_interface = NULL; | |
2393 | struct node_vtable *c; | |
2394 | struct node *n; | |
2395 | int r; | |
2396 | ||
2397 | assert(bus); | |
2398 | assert(m); | |
2399 | assert(s); | |
2400 | assert(prefix); | |
2401 | assert(path); | |
2402 | ||
2403 | n = hashmap_get(bus->nodes, prefix); | |
2404 | if (!n) | |
2405 | return 0; | |
2406 | ||
2407 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 2408 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
d95eb43e DH |
2409 | void *u = NULL; |
2410 | ||
2411 | if (require_fallback && !c->is_fallback) | |
2412 | continue; | |
2413 | if (streq_ptr(c->interface, previous_interface)) | |
2414 | continue; | |
2415 | ||
2416 | /* If a child-node already handled this interface, we | |
2417 | * skip it on any of its parents. The child vtables | |
2418 | * always fully override any conflicting vtables of | |
2419 | * any parent node. */ | |
2420 | if (set_get(s, c->interface)) | |
2421 | continue; | |
2422 | ||
2423 | r = node_vtable_get_userdata(bus, path, c, &u, &error); | |
2424 | if (r < 0) | |
2425 | return r; | |
2426 | if (bus->nodes_modified) | |
2427 | return 0; | |
2428 | if (r == 0) | |
2429 | continue; | |
2430 | ||
2431 | r = set_put(s, c->interface); | |
2432 | if (r < 0) | |
2433 | return r; | |
2434 | ||
2435 | r = sd_bus_message_append(m, "s", c->interface); | |
2436 | if (r < 0) | |
2437 | return r; | |
2438 | ||
2439 | previous_interface = c->interface; | |
2440 | } | |
2441 | ||
2442 | return 0; | |
2443 | } | |
2444 | ||
2445 | static int object_removed_append_all(sd_bus *bus, sd_bus_message *m, const char *path) { | |
2446 | _cleanup_set_free_ Set *s = NULL; | |
2447 | char *prefix; | |
2448 | int r; | |
2449 | ||
2450 | assert(bus); | |
2451 | assert(m); | |
2452 | assert(path); | |
2453 | ||
2454 | /* see sd_bus_emit_object_added() for details */ | |
2455 | ||
2456 | s = set_new(&string_hash_ops); | |
2457 | if (!s) | |
2458 | return -ENOMEM; | |
2459 | ||
2460 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Peer"); | |
2461 | if (r < 0) | |
2462 | return r; | |
2463 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Introspectable"); | |
2464 | if (r < 0) | |
2465 | return r; | |
2466 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Properties"); | |
2467 | if (r < 0) | |
2468 | return r; | |
2469 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.ObjectManager"); | |
2470 | if (r < 0) | |
2471 | return r; | |
2472 | ||
2473 | r = object_removed_append_all_prefix(bus, m, s, path, path, false); | |
2474 | if (r < 0) | |
2475 | return r; | |
2476 | if (bus->nodes_modified) | |
2477 | return 0; | |
2478 | ||
2479 | prefix = alloca(strlen(path) + 1); | |
2480 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2481 | r = object_removed_append_all_prefix(bus, m, s, prefix, path, true); | |
2482 | if (r < 0) | |
2483 | return r; | |
2484 | if (bus->nodes_modified) | |
2485 | return 0; | |
2486 | } | |
2487 | ||
2488 | return 0; | |
2489 | } | |
2490 | ||
969a9685 | 2491 | _public_ int sd_bus_emit_object_removed(sd_bus *bus, const char *path) { |
d95eb43e DH |
2492 | BUS_DONT_DESTROY(bus); |
2493 | ||
4afd3348 | 2494 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2495 | struct node *object_manager; |
d95eb43e DH |
2496 | int r; |
2497 | ||
2498 | /* | |
2499 | * This is like sd_bus_emit_object_added(), but emits an | |
2500 | * InterfacesRemoved signal on the given path. This only includes any | |
2501 | * registered interfaces but skips the properties. Note that this will | |
2502 | * call into the find() callbacks of any registered vtable. Therefore, | |
2503 | * you must call this function before destroying/unlinking your object. | |
2504 | * Otherwise, the list of interfaces will be incomplete. However, note | |
2505 | * that this will *NOT* call into any property callback. Therefore, the | |
2506 | * object might be in an "destructed" state, as long as we can find it. | |
2507 | */ | |
2508 | ||
2509 | assert_return(bus, -EINVAL); | |
2510 | assert_return(object_path_is_valid(path), -EINVAL); | |
2511 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2512 | ||
2513 | if (!BUS_IS_OPEN(bus->state)) | |
2514 | return -ENOTCONN; | |
2515 | ||
2d5c8a27 DH |
2516 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2517 | if (r < 0) | |
2518 | return r; | |
2519 | if (r == 0) | |
2520 | return -ESRCH; | |
2521 | ||
d95eb43e DH |
2522 | do { |
2523 | bus->nodes_modified = false; | |
2524 | m = sd_bus_message_unref(m); | |
2525 | ||
2d5c8a27 | 2526 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved"); |
d95eb43e DH |
2527 | if (r < 0) |
2528 | return r; | |
2529 | ||
2530 | r = sd_bus_message_append_basic(m, 'o', path); | |
2531 | if (r < 0) | |
2532 | return r; | |
2533 | ||
2534 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2535 | if (r < 0) | |
2536 | return r; | |
2537 | ||
2538 | r = object_removed_append_all(bus, m, path); | |
2539 | if (r < 0) | |
2540 | return r; | |
2541 | ||
2542 | if (bus->nodes_modified) | |
2543 | continue; | |
2544 | ||
2545 | r = sd_bus_message_close_container(m); | |
2546 | if (r < 0) | |
2547 | return r; | |
2548 | ||
2549 | } while (bus->nodes_modified); | |
2550 | ||
2551 | return sd_bus_send(bus, m, NULL); | |
2552 | } | |
2553 | ||
4be39163 LP |
2554 | static int interfaces_added_append_one_prefix( |
2555 | sd_bus *bus, | |
2556 | sd_bus_message *m, | |
2557 | const char *prefix, | |
2558 | const char *path, | |
2559 | const char *interface, | |
2560 | bool require_fallback) { | |
2561 | ||
4afd3348 | 2562 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
718db961 | 2563 | bool found_interface = false; |
4be39163 LP |
2564 | struct node_vtable *c; |
2565 | struct node *n; | |
2566 | void *u = NULL; | |
2567 | int r; | |
2568 | ||
2569 | assert(bus); | |
2570 | assert(m); | |
2571 | assert(prefix); | |
2572 | assert(path); | |
2573 | assert(interface); | |
2574 | ||
2575 | n = hashmap_get(bus->nodes, prefix); | |
2576 | if (!n) | |
2577 | return 0; | |
2578 | ||
2579 | LIST_FOREACH(vtables, c, n->vtables) { | |
2580 | if (require_fallback && !c->is_fallback) | |
2581 | continue; | |
2582 | ||
718db961 LP |
2583 | if (!streq(c->interface, interface)) |
2584 | continue; | |
4be39163 | 2585 | |
f00c3121 | 2586 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
718db961 LP |
2587 | if (r < 0) |
2588 | return r; | |
2589 | if (bus->nodes_modified) | |
2590 | return 0; | |
2591 | if (r == 0) | |
2592 | continue; | |
4be39163 | 2593 | |
718db961 LP |
2594 | if (!found_interface) { |
2595 | r = sd_bus_message_append_basic(m, 's', interface); | |
2596 | if (r < 0) | |
2597 | return r; | |
4be39163 | 2598 | |
718db961 LP |
2599 | r = sd_bus_message_open_container(m, 'a', "{sv}"); |
2600 | if (r < 0) | |
2601 | return r; | |
4be39163 | 2602 | |
718db961 LP |
2603 | found_interface = true; |
2604 | } | |
4be39163 | 2605 | |
718db961 LP |
2606 | r = vtable_append_all_properties(bus, m, path, c, u, &error); |
2607 | if (r < 0) | |
2608 | return r; | |
2609 | if (bus->nodes_modified) | |
2610 | return 0; | |
2611 | } | |
4be39163 | 2612 | |
718db961 LP |
2613 | if (found_interface) { |
2614 | r = sd_bus_message_close_container(m); | |
2615 | if (r < 0) | |
2616 | return r; | |
2617 | } | |
4be39163 | 2618 | |
718db961 | 2619 | return found_interface; |
4be39163 LP |
2620 | } |
2621 | ||
2622 | static int interfaces_added_append_one( | |
2623 | sd_bus *bus, | |
2624 | sd_bus_message *m, | |
2625 | const char *path, | |
2626 | const char *interface) { | |
2627 | ||
2628 | char *prefix; | |
2629 | int r; | |
2630 | ||
2631 | assert(bus); | |
2632 | assert(m); | |
2633 | assert(path); | |
2634 | assert(interface); | |
2635 | ||
2636 | r = interfaces_added_append_one_prefix(bus, m, path, path, interface, false); | |
2637 | if (r != 0) | |
2638 | return r; | |
68313d3d LP |
2639 | if (bus->nodes_modified) |
2640 | return 0; | |
4be39163 LP |
2641 | |
2642 | prefix = alloca(strlen(path) + 1); | |
2643 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2644 | r = interfaces_added_append_one_prefix(bus, m, prefix, path, interface, true); | |
2645 | if (r != 0) | |
2646 | return r; | |
68313d3d LP |
2647 | if (bus->nodes_modified) |
2648 | return 0; | |
4be39163 LP |
2649 | } |
2650 | ||
2651 | return -ENOENT; | |
992c052c LP |
2652 | } |
2653 | ||
d9f644e2 | 2654 | _public_ int sd_bus_emit_interfaces_added_strv(sd_bus *bus, const char *path, char **interfaces) { |
8ce2afd6 LP |
2655 | BUS_DONT_DESTROY(bus); |
2656 | ||
4afd3348 | 2657 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2658 | struct node *object_manager; |
4be39163 LP |
2659 | char **i; |
2660 | int r; | |
2661 | ||
2662 | assert_return(bus, -EINVAL); | |
2663 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2664 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2665 | ||
a3d59cd1 LP |
2666 | if (!BUS_IS_OPEN(bus->state)) |
2667 | return -ENOTCONN; | |
2668 | ||
4be39163 LP |
2669 | if (strv_isempty(interfaces)) |
2670 | return 0; | |
2671 | ||
2d5c8a27 DH |
2672 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2673 | if (r < 0) | |
2674 | return r; | |
2675 | if (r == 0) | |
2676 | return -ESRCH; | |
2677 | ||
68313d3d LP |
2678 | do { |
2679 | bus->nodes_modified = false; | |
1b02f301 | 2680 | m = sd_bus_message_unref(m); |
4be39163 | 2681 | |
2d5c8a27 | 2682 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded"); |
68313d3d LP |
2683 | if (r < 0) |
2684 | return r; | |
4be39163 | 2685 | |
68313d3d | 2686 | r = sd_bus_message_append_basic(m, 'o', path); |
4be39163 LP |
2687 | if (r < 0) |
2688 | return r; | |
2689 | ||
68313d3d | 2690 | r = sd_bus_message_open_container(m, 'a', "{sa{sv}}"); |
4be39163 LP |
2691 | if (r < 0) |
2692 | return r; | |
2693 | ||
68313d3d LP |
2694 | STRV_FOREACH(i, interfaces) { |
2695 | assert_return(interface_name_is_valid(*i), -EINVAL); | |
2696 | ||
2697 | r = sd_bus_message_open_container(m, 'e', "sa{sv}"); | |
2698 | if (r < 0) | |
2699 | return r; | |
2700 | ||
2701 | r = interfaces_added_append_one(bus, m, path, *i); | |
2702 | if (r < 0) | |
2703 | return r; | |
2704 | ||
2705 | if (bus->nodes_modified) | |
2706 | break; | |
2707 | ||
2708 | r = sd_bus_message_close_container(m); | |
2709 | if (r < 0) | |
2710 | return r; | |
2711 | } | |
2712 | ||
2713 | if (bus->nodes_modified) | |
2714 | continue; | |
2715 | ||
4be39163 LP |
2716 | r = sd_bus_message_close_container(m); |
2717 | if (r < 0) | |
2718 | return r; | |
4be39163 | 2719 | |
68313d3d | 2720 | } while (bus->nodes_modified); |
4be39163 LP |
2721 | |
2722 | return sd_bus_send(bus, m, NULL); | |
2723 | } | |
2724 | ||
d9f644e2 | 2725 | _public_ int sd_bus_emit_interfaces_added(sd_bus *bus, const char *path, const char *interface, ...) { |
250a918d | 2726 | char **interfaces; |
4be39163 LP |
2727 | |
2728 | assert_return(bus, -EINVAL); | |
2729 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2730 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2731 | ||
a3d59cd1 LP |
2732 | if (!BUS_IS_OPEN(bus->state)) |
2733 | return -ENOTCONN; | |
2734 | ||
250a918d | 2735 | interfaces = strv_from_stdarg_alloca(interface); |
4be39163 LP |
2736 | |
2737 | return sd_bus_emit_interfaces_added_strv(bus, path, interfaces); | |
2738 | } | |
2739 | ||
d9f644e2 | 2740 | _public_ int sd_bus_emit_interfaces_removed_strv(sd_bus *bus, const char *path, char **interfaces) { |
4afd3348 | 2741 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2742 | struct node *object_manager; |
4be39163 LP |
2743 | int r; |
2744 | ||
2745 | assert_return(bus, -EINVAL); | |
2746 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2747 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2748 | ||
a3d59cd1 LP |
2749 | if (!BUS_IS_OPEN(bus->state)) |
2750 | return -ENOTCONN; | |
2751 | ||
4be39163 LP |
2752 | if (strv_isempty(interfaces)) |
2753 | return 0; | |
2754 | ||
2d5c8a27 DH |
2755 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2756 | if (r < 0) | |
2757 | return r; | |
2758 | if (r == 0) | |
2759 | return -ESRCH; | |
2760 | ||
2761 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved"); | |
4be39163 LP |
2762 | if (r < 0) |
2763 | return r; | |
2764 | ||
2765 | r = sd_bus_message_append_basic(m, 'o', path); | |
2766 | if (r < 0) | |
2767 | return r; | |
2768 | ||
2769 | r = sd_bus_message_append_strv(m, interfaces); | |
2770 | if (r < 0) | |
2771 | return r; | |
2772 | ||
2773 | return sd_bus_send(bus, m, NULL); | |
2774 | } | |
2775 | ||
d9f644e2 | 2776 | _public_ int sd_bus_emit_interfaces_removed(sd_bus *bus, const char *path, const char *interface, ...) { |
250a918d | 2777 | char **interfaces; |
4be39163 LP |
2778 | |
2779 | assert_return(bus, -EINVAL); | |
2780 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2781 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2782 | ||
a3d59cd1 LP |
2783 | if (!BUS_IS_OPEN(bus->state)) |
2784 | return -ENOTCONN; | |
2785 | ||
250a918d | 2786 | interfaces = strv_from_stdarg_alloca(interface); |
4be39163 LP |
2787 | |
2788 | return sd_bus_emit_interfaces_removed_strv(bus, path, interfaces); | |
992c052c LP |
2789 | } |
2790 | ||
19befb2d LP |
2791 | _public_ int sd_bus_add_object_manager(sd_bus *bus, sd_bus_slot **slot, const char *path) { |
2792 | sd_bus_slot *s; | |
992c052c | 2793 | struct node *n; |
19befb2d | 2794 | int r; |
992c052c | 2795 | |
dfa92725 LP |
2796 | assert_return(bus, -EINVAL); |
2797 | assert_return(object_path_is_valid(path), -EINVAL); | |
2798 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c LP |
2799 | |
2800 | n = bus_node_allocate(bus, path); | |
2801 | if (!n) | |
2802 | return -ENOMEM; | |
2803 | ||
19befb2d LP |
2804 | s = bus_slot_allocate(bus, !slot, BUS_NODE_OBJECT_MANAGER, sizeof(struct node_object_manager), NULL); |
2805 | if (!s) { | |
2806 | r = -ENOMEM; | |
2807 | goto fail; | |
2808 | } | |
992c052c | 2809 | |
19befb2d LP |
2810 | s->node_object_manager.node = n; |
2811 | LIST_PREPEND(object_managers, n->object_managers, &s->node_object_manager); | |
2812 | bus->nodes_modified = true; | |
992c052c | 2813 | |
19befb2d LP |
2814 | if (slot) |
2815 | *slot = s; | |
992c052c | 2816 | |
19befb2d | 2817 | return 0; |
992c052c | 2818 | |
19befb2d LP |
2819 | fail: |
2820 | sd_bus_slot_unref(s); | |
992c052c | 2821 | bus_node_gc(bus, n); |
dfa92725 | 2822 | |
19befb2d | 2823 | return r; |
992c052c | 2824 | } |