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Commit | Line | Data |
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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 | ||
733e792b AJ |
832 | if (!*found_object) |
833 | return 0; | |
834 | ||
992c052c LP |
835 | if (!found_interface) { |
836 | r = sd_bus_reply_method_errorf( | |
df2d202e | 837 | m, |
40ca29a1 | 838 | SD_BUS_ERROR_UNKNOWN_INTERFACE, |
992c052c LP |
839 | "Unknown interface '%s'.", iface); |
840 | if (r < 0) | |
841 | return r; | |
842 | ||
843 | return 1; | |
844 | } | |
845 | ||
846 | r = sd_bus_message_close_container(reply); | |
847 | if (r < 0) | |
848 | return r; | |
849 | ||
850 | r = sd_bus_send(bus, reply, NULL); | |
851 | if (r < 0) | |
852 | return r; | |
853 | ||
854 | return 1; | |
855 | } | |
856 | ||
ff02f101 | 857 | static int bus_node_exists( |
dfa92725 LP |
858 | sd_bus *bus, |
859 | struct node *n, | |
860 | const char *path, | |
861 | bool require_fallback) { | |
862 | ||
992c052c LP |
863 | struct node_vtable *c; |
864 | struct node_callback *k; | |
ff02f101 | 865 | int r; |
992c052c LP |
866 | |
867 | assert(bus); | |
868 | assert(n); | |
dfa92725 | 869 | assert(path); |
992c052c LP |
870 | |
871 | /* Tests if there's anything attached directly to this node | |
872 | * for the specified path */ | |
873 | ||
ff02f101 DH |
874 | if (!require_fallback && (n->enumerators || n->object_managers)) |
875 | return true; | |
876 | ||
992c052c LP |
877 | LIST_FOREACH(callbacks, k, n->callbacks) { |
878 | if (require_fallback && !k->is_fallback) | |
879 | continue; | |
880 | ||
ff02f101 | 881 | return 1; |
992c052c LP |
882 | } |
883 | ||
884 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 885 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
886 | |
887 | if (require_fallback && !c->is_fallback) | |
888 | continue; | |
889 | ||
ff02f101 DH |
890 | r = node_vtable_get_userdata(bus, path, c, NULL, &error); |
891 | if (r != 0) | |
892 | return r; | |
68313d3d | 893 | if (bus->nodes_modified) |
ff02f101 | 894 | return 0; |
992c052c LP |
895 | } |
896 | ||
ff02f101 | 897 | return 0; |
992c052c LP |
898 | } |
899 | ||
900 | static int process_introspect( | |
901 | sd_bus *bus, | |
902 | sd_bus_message *m, | |
903 | struct node *n, | |
904 | bool require_fallback, | |
905 | bool *found_object) { | |
906 | ||
4afd3348 LP |
907 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
908 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
992c052c | 909 | _cleanup_set_free_free_ Set *s = NULL; |
718db961 | 910 | const char *previous_interface = NULL; |
992c052c LP |
911 | struct introspect intro; |
912 | struct node_vtable *c; | |
913 | bool empty; | |
914 | int r; | |
915 | ||
916 | assert(bus); | |
917 | assert(m); | |
918 | assert(n); | |
919 | assert(found_object); | |
920 | ||
44eb1add | 921 | r = get_child_nodes(bus, m->path, n, 0, &s, &error); |
992c052c | 922 | if (r < 0) |
f00c3121 | 923 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
924 | if (bus->nodes_modified) |
925 | return 0; | |
992c052c | 926 | |
7fb411f0 | 927 | r = introspect_begin(&intro, bus->trusted); |
992c052c LP |
928 | if (r < 0) |
929 | return r; | |
930 | ||
943c3f94 | 931 | r = introspect_write_default_interfaces(&intro, !require_fallback && n->object_managers); |
992c052c LP |
932 | if (r < 0) |
933 | return r; | |
934 | ||
935 | empty = set_isempty(s); | |
936 | ||
937 | LIST_FOREACH(vtables, c, n->vtables) { | |
938 | if (require_fallback && !c->is_fallback) | |
939 | continue; | |
940 | ||
f00c3121 LP |
941 | r = node_vtable_get_userdata(bus, m->path, c, NULL, &error); |
942 | if (r < 0) { | |
943 | r = bus_maybe_reply_error(m, r, &error); | |
944 | goto finish; | |
945 | } | |
946 | if (bus->nodes_modified) { | |
947 | r = 0; | |
948 | goto finish; | |
949 | } | |
992c052c LP |
950 | if (r == 0) |
951 | continue; | |
952 | ||
953 | empty = false; | |
954 | ||
6e8df5f0 LP |
955 | if (c->vtable[0].flags & SD_BUS_VTABLE_HIDDEN) |
956 | continue; | |
957 | ||
718db961 LP |
958 | if (!streq_ptr(previous_interface, c->interface)) { |
959 | ||
960 | if (previous_interface) | |
4b61c875 | 961 | fputs_unlocked(" </interface>\n", intro.f); |
718db961 LP |
962 | |
963 | fprintf(intro.f, " <interface name=\"%s\">\n", c->interface); | |
964 | } | |
965 | ||
966 | r = introspect_write_interface(&intro, c->vtable); | |
992c052c LP |
967 | if (r < 0) |
968 | goto finish; | |
718db961 LP |
969 | |
970 | previous_interface = c->interface; | |
992c052c LP |
971 | } |
972 | ||
718db961 | 973 | if (previous_interface) |
4b61c875 | 974 | fputs_unlocked(" </interface>\n", intro.f); |
718db961 | 975 | |
992c052c LP |
976 | if (empty) { |
977 | /* Nothing?, let's see if we exist at all, and if not | |
978 | * refuse to do anything */ | |
979 | r = bus_node_exists(bus, n, m->path, require_fallback); | |
f2bfc6ba LP |
980 | if (r <= 0) { |
981 | r = bus_maybe_reply_error(m, r, &error); | |
ff02f101 | 982 | goto finish; |
f2bfc6ba | 983 | } |
ff02f101 DH |
984 | if (bus->nodes_modified) { |
985 | r = 0; | |
992c052c | 986 | goto finish; |
ff02f101 | 987 | } |
992c052c LP |
988 | } |
989 | ||
990 | *found_object = true; | |
991 | ||
992 | r = introspect_write_child_nodes(&intro, s, m->path); | |
993 | if (r < 0) | |
994 | goto finish; | |
995 | ||
996 | r = introspect_finish(&intro, bus, m, &reply); | |
997 | if (r < 0) | |
998 | goto finish; | |
999 | ||
1000 | r = sd_bus_send(bus, reply, NULL); | |
1001 | if (r < 0) | |
1002 | goto finish; | |
1003 | ||
1004 | r = 1; | |
1005 | ||
1006 | finish: | |
1007 | introspect_free(&intro); | |
1008 | return r; | |
1009 | } | |
1010 | ||
992c052c LP |
1011 | static int object_manager_serialize_path( |
1012 | sd_bus *bus, | |
1013 | sd_bus_message *reply, | |
1014 | const char *prefix, | |
1015 | const char *path, | |
1016 | bool require_fallback, | |
1017 | sd_bus_error *error) { | |
1018 | ||
718db961 LP |
1019 | const char *previous_interface = NULL; |
1020 | bool found_something = false; | |
992c052c LP |
1021 | struct node_vtable *i; |
1022 | struct node *n; | |
1023 | int r; | |
1024 | ||
1025 | assert(bus); | |
1026 | assert(reply); | |
1027 | assert(prefix); | |
1028 | assert(path); | |
1029 | assert(error); | |
1030 | ||
1031 | n = hashmap_get(bus->nodes, prefix); | |
1032 | if (!n) | |
1033 | return 0; | |
1034 | ||
992c052c | 1035 | LIST_FOREACH(vtables, i, n->vtables) { |
92db139e | 1036 | void *u; |
992c052c LP |
1037 | |
1038 | if (require_fallback && !i->is_fallback) | |
1039 | continue; | |
1040 | ||
f00c3121 | 1041 | r = node_vtable_get_userdata(bus, path, i, &u, error); |
92db139e LP |
1042 | if (r < 0) |
1043 | return r; | |
68313d3d LP |
1044 | if (bus->nodes_modified) |
1045 | return 0; | |
92db139e LP |
1046 | if (r == 0) |
1047 | continue; | |
1048 | ||
1049 | if (!found_something) { | |
718db961 LP |
1050 | |
1051 | /* Open the object part */ | |
1052 | ||
92db139e LP |
1053 | r = sd_bus_message_open_container(reply, 'e', "oa{sa{sv}}"); |
1054 | if (r < 0) | |
1055 | return r; | |
1056 | ||
1057 | r = sd_bus_message_append(reply, "o", path); | |
1058 | if (r < 0) | |
1059 | return r; | |
1060 | ||
1061 | r = sd_bus_message_open_container(reply, 'a', "{sa{sv}}"); | |
1062 | if (r < 0) | |
1063 | return r; | |
1064 | ||
c0e7906d DH |
1065 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Peer", 0); |
1066 | if (r < 0) | |
1067 | return r; | |
1068 | ||
1069 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Introspectable", 0); | |
1070 | if (r < 0) | |
1071 | return r; | |
1072 | ||
1073 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Properties", 0); | |
1074 | if (r < 0) | |
1075 | return r; | |
1076 | ||
1077 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.ObjectManager", 0); | |
1078 | if (r < 0) | |
1079 | return r; | |
1080 | ||
92db139e LP |
1081 | found_something = true; |
1082 | } | |
1083 | ||
718db961 LP |
1084 | if (!streq_ptr(previous_interface, i->interface)) { |
1085 | ||
1086 | /* Maybe close the previous interface part */ | |
1087 | ||
1088 | if (previous_interface) { | |
1089 | r = sd_bus_message_close_container(reply); | |
1090 | if (r < 0) | |
1091 | return r; | |
1092 | ||
1093 | r = sd_bus_message_close_container(reply); | |
1094 | if (r < 0) | |
1095 | return r; | |
1096 | } | |
1097 | ||
1098 | /* Open the new interface part */ | |
1099 | ||
1100 | r = sd_bus_message_open_container(reply, 'e', "sa{sv}"); | |
1101 | if (r < 0) | |
1102 | return r; | |
1103 | ||
1104 | r = sd_bus_message_append(reply, "s", i->interface); | |
1105 | if (r < 0) | |
1106 | return r; | |
1107 | ||
1108 | r = sd_bus_message_open_container(reply, 'a', "{sv}"); | |
1109 | if (r < 0) | |
1110 | return r; | |
1111 | } | |
1112 | ||
1113 | r = vtable_append_all_properties(bus, reply, path, i, u, error); | |
992c052c LP |
1114 | if (r < 0) |
1115 | return r; | |
68313d3d LP |
1116 | if (bus->nodes_modified) |
1117 | return 0; | |
718db961 LP |
1118 | |
1119 | previous_interface = i->interface; | |
1120 | } | |
1121 | ||
1122 | if (previous_interface) { | |
1123 | r = sd_bus_message_close_container(reply); | |
1124 | if (r < 0) | |
1125 | return r; | |
1126 | ||
1127 | r = sd_bus_message_close_container(reply); | |
1128 | if (r < 0) | |
1129 | return r; | |
992c052c LP |
1130 | } |
1131 | ||
92db139e LP |
1132 | if (found_something) { |
1133 | r = sd_bus_message_close_container(reply); | |
1134 | if (r < 0) | |
1135 | return r; | |
992c052c | 1136 | |
92db139e LP |
1137 | r = sd_bus_message_close_container(reply); |
1138 | if (r < 0) | |
1139 | return r; | |
1140 | } | |
992c052c LP |
1141 | |
1142 | return 1; | |
1143 | } | |
1144 | ||
1145 | static int object_manager_serialize_path_and_fallbacks( | |
1146 | sd_bus *bus, | |
1147 | sd_bus_message *reply, | |
1148 | const char *path, | |
1149 | sd_bus_error *error) { | |
1150 | ||
92e189e5 | 1151 | char *prefix; |
992c052c LP |
1152 | int r; |
1153 | ||
1154 | assert(bus); | |
1155 | assert(reply); | |
1156 | assert(path); | |
1157 | assert(error); | |
1158 | ||
1159 | /* First, add all vtables registered for this path */ | |
1160 | r = object_manager_serialize_path(bus, reply, path, path, false, error); | |
1161 | if (r < 0) | |
1162 | return r; | |
68313d3d LP |
1163 | if (bus->nodes_modified) |
1164 | return 0; | |
992c052c LP |
1165 | |
1166 | /* Second, add fallback vtables registered for any of the prefixes */ | |
92e189e5 LP |
1167 | prefix = alloca(strlen(path) + 1); |
1168 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
1169 | r = object_manager_serialize_path(bus, reply, prefix, path, true, error); | |
1170 | if (r < 0) | |
1171 | return r; | |
68313d3d LP |
1172 | if (bus->nodes_modified) |
1173 | return 0; | |
992c052c LP |
1174 | } |
1175 | ||
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | static int process_get_managed_objects( | |
1180 | sd_bus *bus, | |
1181 | sd_bus_message *m, | |
1182 | struct node *n, | |
1183 | bool require_fallback, | |
1184 | bool *found_object) { | |
1185 | ||
4afd3348 LP |
1186 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
1187 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
992c052c | 1188 | _cleanup_set_free_free_ Set *s = NULL; |
943c3f94 DH |
1189 | Iterator i; |
1190 | char *path; | |
992c052c LP |
1191 | int r; |
1192 | ||
1193 | assert(bus); | |
1194 | assert(m); | |
1195 | assert(n); | |
1196 | assert(found_object); | |
1197 | ||
943c3f94 DH |
1198 | /* Spec says, GetManagedObjects() is only implemented on the root of a |
1199 | * sub-tree. Therefore, we require a registered object-manager on | |
1200 | * exactly the queried path, otherwise, we refuse to respond. */ | |
1201 | ||
1202 | if (require_fallback || !n->object_managers) | |
992c052c LP |
1203 | return 0; |
1204 | ||
44eb1add | 1205 | r = get_child_nodes(bus, m->path, n, CHILDREN_RECURSIVE, &s, &error); |
992c052c | 1206 | if (r < 0) |
f2bfc6ba | 1207 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
1208 | if (bus->nodes_modified) |
1209 | return 0; | |
992c052c | 1210 | |
df2d202e | 1211 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
1212 | if (r < 0) |
1213 | return r; | |
1214 | ||
1215 | r = sd_bus_message_open_container(reply, 'a', "{oa{sa{sv}}}"); | |
1216 | if (r < 0) | |
1217 | return r; | |
1218 | ||
943c3f94 DH |
1219 | SET_FOREACH(path, s, i) { |
1220 | r = object_manager_serialize_path_and_fallbacks(bus, reply, path, &error); | |
1221 | if (r < 0) | |
f2bfc6ba | 1222 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 1223 | |
943c3f94 | 1224 | if (bus->nodes_modified) |
992c052c | 1225 | return 0; |
992c052c LP |
1226 | } |
1227 | ||
1228 | r = sd_bus_message_close_container(reply); | |
1229 | if (r < 0) | |
1230 | return r; | |
1231 | ||
1232 | r = sd_bus_send(bus, reply, NULL); | |
1233 | if (r < 0) | |
1234 | return r; | |
1235 | ||
1236 | return 1; | |
1237 | } | |
1238 | ||
1239 | static int object_find_and_run( | |
1240 | sd_bus *bus, | |
1241 | sd_bus_message *m, | |
1242 | const char *p, | |
1243 | bool require_fallback, | |
1244 | bool *found_object) { | |
1245 | ||
1246 | struct node *n; | |
1247 | struct vtable_member vtable_key, *v; | |
1248 | int r; | |
1249 | ||
1250 | assert(bus); | |
1251 | assert(m); | |
1252 | assert(p); | |
1253 | assert(found_object); | |
1254 | ||
1255 | n = hashmap_get(bus->nodes, p); | |
1256 | if (!n) | |
1257 | return 0; | |
1258 | ||
1259 | /* First, try object callbacks */ | |
1260 | r = node_callbacks_run(bus, m, n->callbacks, require_fallback, found_object); | |
1261 | if (r != 0) | |
1262 | return r; | |
68313d3d LP |
1263 | if (bus->nodes_modified) |
1264 | return 0; | |
992c052c LP |
1265 | |
1266 | if (!m->interface || !m->member) | |
1267 | return 0; | |
1268 | ||
1269 | /* Then, look for a known method */ | |
1270 | vtable_key.path = (char*) p; | |
1271 | vtable_key.interface = m->interface; | |
1272 | vtable_key.member = m->member; | |
1273 | ||
1274 | v = hashmap_get(bus->vtable_methods, &vtable_key); | |
1275 | if (v) { | |
1276 | r = method_callbacks_run(bus, m, v, require_fallback, found_object); | |
1277 | if (r != 0) | |
1278 | return r; | |
68313d3d LP |
1279 | if (bus->nodes_modified) |
1280 | return 0; | |
992c052c LP |
1281 | } |
1282 | ||
1283 | /* Then, look for a known property */ | |
1284 | if (streq(m->interface, "org.freedesktop.DBus.Properties")) { | |
1285 | bool get = false; | |
1286 | ||
1287 | get = streq(m->member, "Get"); | |
1288 | ||
1289 | if (get || streq(m->member, "Set")) { | |
1290 | ||
1291 | r = sd_bus_message_rewind(m, true); | |
1292 | if (r < 0) | |
1293 | return r; | |
1294 | ||
1295 | vtable_key.path = (char*) p; | |
1296 | ||
1297 | r = sd_bus_message_read(m, "ss", &vtable_key.interface, &vtable_key.member); | |
1298 | if (r < 0) | |
0fc5ab90 | 1299 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface and member parameters"); |
992c052c LP |
1300 | |
1301 | v = hashmap_get(bus->vtable_properties, &vtable_key); | |
1302 | if (v) { | |
1303 | r = property_get_set_callbacks_run(bus, m, v, require_fallback, get, found_object); | |
1304 | if (r != 0) | |
1305 | return r; | |
1306 | } | |
1307 | ||
1308 | } else if (streq(m->member, "GetAll")) { | |
1309 | const char *iface; | |
1310 | ||
1311 | r = sd_bus_message_rewind(m, true); | |
1312 | if (r < 0) | |
1313 | return r; | |
1314 | ||
1315 | r = sd_bus_message_read(m, "s", &iface); | |
1316 | if (r < 0) | |
0fc5ab90 | 1317 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface parameter"); |
992c052c LP |
1318 | |
1319 | if (iface[0] == 0) | |
1320 | iface = NULL; | |
1321 | ||
1322 | r = property_get_all_callbacks_run(bus, m, n->vtables, require_fallback, iface, found_object); | |
1323 | if (r != 0) | |
1324 | return r; | |
1325 | } | |
1326 | ||
1327 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) { | |
1328 | ||
0fc5ab90 LP |
1329 | if (!isempty(sd_bus_message_get_signature(m, true))) |
1330 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
1331 | ||
992c052c LP |
1332 | r = process_introspect(bus, m, n, require_fallback, found_object); |
1333 | if (r != 0) | |
1334 | return r; | |
1335 | ||
1336 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.ObjectManager", "GetManagedObjects")) { | |
1337 | ||
0fc5ab90 LP |
1338 | if (!isempty(sd_bus_message_get_signature(m, true))) |
1339 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
1340 | ||
992c052c LP |
1341 | r = process_get_managed_objects(bus, m, n, require_fallback, found_object); |
1342 | if (r != 0) | |
1343 | return r; | |
1344 | } | |
1345 | ||
68313d3d LP |
1346 | if (bus->nodes_modified) |
1347 | return 0; | |
1348 | ||
992c052c LP |
1349 | if (!*found_object) { |
1350 | r = bus_node_exists(bus, n, m->path, require_fallback); | |
1351 | if (r < 0) | |
f2bfc6ba | 1352 | return bus_maybe_reply_error(m, r, NULL); |
ff02f101 DH |
1353 | if (bus->nodes_modified) |
1354 | return 0; | |
992c052c LP |
1355 | if (r > 0) |
1356 | *found_object = true; | |
1357 | } | |
1358 | ||
1359 | return 0; | |
1360 | } | |
1361 | ||
1362 | int bus_process_object(sd_bus *bus, sd_bus_message *m) { | |
1363 | int r; | |
1364 | size_t pl; | |
1365 | bool found_object = false; | |
1366 | ||
1367 | assert(bus); | |
1368 | assert(m); | |
1369 | ||
09365592 LP |
1370 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1371 | return 0; | |
1372 | ||
40ca29a1 | 1373 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
992c052c LP |
1374 | return 0; |
1375 | ||
992c052c LP |
1376 | if (hashmap_isempty(bus->nodes)) |
1377 | return 0; | |
1378 | ||
f820cf99 LP |
1379 | /* Never respond to broadcast messages */ |
1380 | if (bus->bus_client && !m->destination) | |
1381 | return 0; | |
1382 | ||
adacb957 LP |
1383 | assert(m->path); |
1384 | assert(m->member); | |
1385 | ||
992c052c LP |
1386 | pl = strlen(m->path); |
1387 | do { | |
92e189e5 | 1388 | char prefix[pl+1]; |
992c052c LP |
1389 | |
1390 | bus->nodes_modified = false; | |
1391 | ||
1392 | r = object_find_and_run(bus, m, m->path, false, &found_object); | |
1393 | if (r != 0) | |
1394 | return r; | |
1395 | ||
1396 | /* Look for fallback prefixes */ | |
92e189e5 | 1397 | OBJECT_PATH_FOREACH_PREFIX(prefix, m->path) { |
992c052c LP |
1398 | |
1399 | if (bus->nodes_modified) | |
1400 | break; | |
1401 | ||
92e189e5 | 1402 | r = object_find_and_run(bus, m, prefix, true, &found_object); |
992c052c LP |
1403 | if (r != 0) |
1404 | return r; | |
1405 | } | |
1406 | ||
1407 | } while (bus->nodes_modified); | |
1408 | ||
1409 | if (!found_object) | |
1410 | return 0; | |
1411 | ||
1412 | if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Get") || | |
1413 | sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Set")) | |
1414 | r = sd_bus_reply_method_errorf( | |
df2d202e | 1415 | m, |
40ca29a1 | 1416 | SD_BUS_ERROR_UNKNOWN_PROPERTY, |
992c052c LP |
1417 | "Unknown property or interface."); |
1418 | else | |
1419 | r = sd_bus_reply_method_errorf( | |
df2d202e | 1420 | m, |
40ca29a1 | 1421 | SD_BUS_ERROR_UNKNOWN_METHOD, |
992c052c LP |
1422 | "Unknown method '%s' or interface '%s'.", m->member, m->interface); |
1423 | ||
1424 | if (r < 0) | |
1425 | return r; | |
1426 | ||
1427 | return 1; | |
1428 | } | |
1429 | ||
1430 | static struct node *bus_node_allocate(sd_bus *bus, const char *path) { | |
1431 | struct node *n, *parent; | |
1432 | const char *e; | |
2fd069b1 ZJS |
1433 | _cleanup_free_ char *s = NULL; |
1434 | char *p; | |
992c052c LP |
1435 | int r; |
1436 | ||
1437 | assert(bus); | |
1438 | assert(path); | |
1439 | assert(path[0] == '/'); | |
1440 | ||
1441 | n = hashmap_get(bus->nodes, path); | |
1442 | if (n) | |
1443 | return n; | |
1444 | ||
d5099efc | 1445 | r = hashmap_ensure_allocated(&bus->nodes, &string_hash_ops); |
992c052c LP |
1446 | if (r < 0) |
1447 | return NULL; | |
1448 | ||
1449 | s = strdup(path); | |
1450 | if (!s) | |
1451 | return NULL; | |
1452 | ||
1453 | if (streq(path, "/")) | |
1454 | parent = NULL; | |
1455 | else { | |
1456 | e = strrchr(path, '/'); | |
1457 | assert(e); | |
1458 | ||
7d67077f | 1459 | p = strndupa(path, MAX(1, e - path)); |
992c052c LP |
1460 | |
1461 | parent = bus_node_allocate(bus, p); | |
2fd069b1 | 1462 | if (!parent) |
992c052c | 1463 | return NULL; |
992c052c LP |
1464 | } |
1465 | ||
1466 | n = new0(struct node, 1); | |
1467 | if (!n) | |
1468 | return NULL; | |
1469 | ||
1470 | n->parent = parent; | |
1471 | n->path = s; | |
2fd069b1 | 1472 | s = NULL; /* do not free */ |
992c052c | 1473 | |
8e050193 | 1474 | r = hashmap_put(bus->nodes, n->path, n); |
992c052c | 1475 | if (r < 0) { |
2fd069b1 | 1476 | free(n->path); |
992c052c LP |
1477 | free(n); |
1478 | return NULL; | |
1479 | } | |
1480 | ||
1481 | if (parent) | |
71fda00f | 1482 | LIST_PREPEND(siblings, parent->child, n); |
992c052c LP |
1483 | |
1484 | return n; | |
1485 | } | |
1486 | ||
19befb2d | 1487 | void bus_node_gc(sd_bus *b, struct node *n) { |
992c052c LP |
1488 | assert(b); |
1489 | ||
1490 | if (!n) | |
1491 | return; | |
1492 | ||
1493 | if (n->child || | |
1494 | n->callbacks || | |
1495 | n->vtables || | |
1496 | n->enumerators || | |
19befb2d | 1497 | n->object_managers) |
992c052c LP |
1498 | return; |
1499 | ||
1500 | assert(hashmap_remove(b->nodes, n->path) == n); | |
1501 | ||
1502 | if (n->parent) | |
71fda00f | 1503 | LIST_REMOVE(siblings, n->parent->child, n); |
992c052c LP |
1504 | |
1505 | free(n->path); | |
1506 | bus_node_gc(b, n->parent); | |
1507 | free(n); | |
1508 | } | |
1509 | ||
2d5c8a27 DH |
1510 | static int bus_find_parent_object_manager(sd_bus *bus, struct node **out, const char *path) { |
1511 | struct node *n; | |
1512 | ||
1513 | assert(bus); | |
1514 | assert(path); | |
1515 | ||
1516 | n = hashmap_get(bus->nodes, path); | |
1517 | if (!n) { | |
1518 | char *prefix; | |
1519 | ||
1520 | prefix = alloca(strlen(path) + 1); | |
1521 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
1522 | n = hashmap_get(bus->nodes, prefix); | |
1523 | if (n) | |
1524 | break; | |
1525 | } | |
1526 | } | |
1527 | ||
1528 | while (n && !n->object_managers) | |
1529 | n = n->parent; | |
1530 | ||
1531 | if (out) | |
1532 | *out = n; | |
1533 | return !!n; | |
1534 | } | |
1535 | ||
992c052c | 1536 | static int bus_add_object( |
dfa92725 | 1537 | sd_bus *bus, |
19befb2d | 1538 | sd_bus_slot **slot, |
992c052c LP |
1539 | bool fallback, |
1540 | const char *path, | |
1541 | sd_bus_message_handler_t callback, | |
1542 | void *userdata) { | |
1543 | ||
19befb2d | 1544 | sd_bus_slot *s; |
992c052c LP |
1545 | struct node *n; |
1546 | int r; | |
1547 | ||
dfa92725 LP |
1548 | assert_return(bus, -EINVAL); |
1549 | assert_return(object_path_is_valid(path), -EINVAL); | |
1550 | assert_return(callback, -EINVAL); | |
1551 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c | 1552 | |
dfa92725 | 1553 | n = bus_node_allocate(bus, path); |
992c052c LP |
1554 | if (!n) |
1555 | return -ENOMEM; | |
1556 | ||
19befb2d LP |
1557 | s = bus_slot_allocate(bus, !slot, BUS_NODE_CALLBACK, sizeof(struct node_callback), userdata); |
1558 | if (!s) { | |
992c052c LP |
1559 | r = -ENOMEM; |
1560 | goto fail; | |
1561 | } | |
1562 | ||
19befb2d LP |
1563 | s->node_callback.callback = callback; |
1564 | s->node_callback.is_fallback = fallback; | |
992c052c | 1565 | |
19befb2d LP |
1566 | s->node_callback.node = n; |
1567 | LIST_PREPEND(callbacks, n->callbacks, &s->node_callback); | |
68313d3d LP |
1568 | bus->nodes_modified = true; |
1569 | ||
19befb2d LP |
1570 | if (slot) |
1571 | *slot = s; | |
1572 | ||
992c052c LP |
1573 | return 0; |
1574 | ||
1575 | fail: | |
19befb2d | 1576 | sd_bus_slot_unref(s); |
dfa92725 | 1577 | bus_node_gc(bus, n); |
19befb2d | 1578 | |
992c052c LP |
1579 | return r; |
1580 | } | |
1581 | ||
19befb2d | 1582 | _public_ int sd_bus_add_object( |
992c052c | 1583 | sd_bus *bus, |
19befb2d | 1584 | sd_bus_slot **slot, |
992c052c LP |
1585 | const char *path, |
1586 | sd_bus_message_handler_t callback, | |
1587 | void *userdata) { | |
1588 | ||
19befb2d | 1589 | return bus_add_object(bus, slot, false, path, callback, userdata); |
992c052c LP |
1590 | } |
1591 | ||
19befb2d LP |
1592 | _public_ int sd_bus_add_fallback( |
1593 | sd_bus *bus, | |
1594 | sd_bus_slot **slot, | |
1595 | const char *prefix, | |
1596 | sd_bus_message_handler_t callback, | |
1597 | void *userdata) { | |
992c052c | 1598 | |
19befb2d | 1599 | return bus_add_object(bus, slot, true, prefix, callback, userdata); |
992c052c LP |
1600 | } |
1601 | ||
b826ab58 | 1602 | static void vtable_member_hash_func(const void *a, struct siphash *state) { |
992c052c LP |
1603 | const struct vtable_member *m = a; |
1604 | ||
dfa92725 LP |
1605 | assert(m); |
1606 | ||
b826ab58 TG |
1607 | string_hash_func(m->path, state); |
1608 | string_hash_func(m->interface, state); | |
1609 | string_hash_func(m->member, state); | |
992c052c LP |
1610 | } |
1611 | ||
1612 | static int vtable_member_compare_func(const void *a, const void *b) { | |
1613 | const struct vtable_member *x = a, *y = b; | |
1614 | int r; | |
1615 | ||
dfa92725 LP |
1616 | assert(x); |
1617 | assert(y); | |
1618 | ||
992c052c LP |
1619 | r = strcmp(x->path, y->path); |
1620 | if (r != 0) | |
1621 | return r; | |
1622 | ||
1623 | r = strcmp(x->interface, y->interface); | |
1624 | if (r != 0) | |
1625 | return r; | |
1626 | ||
1627 | return strcmp(x->member, y->member); | |
1628 | } | |
1629 | ||
d5099efc MS |
1630 | static const struct hash_ops vtable_member_hash_ops = { |
1631 | .hash = vtable_member_hash_func, | |
1632 | .compare = vtable_member_compare_func | |
1633 | }; | |
1634 | ||
992c052c LP |
1635 | static int add_object_vtable_internal( |
1636 | sd_bus *bus, | |
19befb2d | 1637 | sd_bus_slot **slot, |
992c052c LP |
1638 | const char *path, |
1639 | const char *interface, | |
1640 | const sd_bus_vtable *vtable, | |
1641 | bool fallback, | |
1642 | sd_bus_object_find_t find, | |
1643 | void *userdata) { | |
1644 | ||
2915234d | 1645 | sd_bus_slot *s = NULL; |
19befb2d | 1646 | struct node_vtable *i, *existing = NULL; |
992c052c LP |
1647 | const sd_bus_vtable *v; |
1648 | struct node *n; | |
1649 | int r; | |
1650 | ||
dfa92725 LP |
1651 | assert_return(bus, -EINVAL); |
1652 | assert_return(object_path_is_valid(path), -EINVAL); | |
1653 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
1654 | assert_return(vtable, -EINVAL); | |
1655 | assert_return(vtable[0].type == _SD_BUS_VTABLE_START, -EINVAL); | |
1656 | assert_return(vtable[0].x.start.element_size == sizeof(struct sd_bus_vtable), -EINVAL); | |
1657 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
718db961 LP |
1658 | assert_return(!streq(interface, "org.freedesktop.DBus.Properties") && |
1659 | !streq(interface, "org.freedesktop.DBus.Introspectable") && | |
1660 | !streq(interface, "org.freedesktop.DBus.Peer") && | |
1661 | !streq(interface, "org.freedesktop.DBus.ObjectManager"), -EINVAL); | |
992c052c | 1662 | |
d5099efc | 1663 | r = hashmap_ensure_allocated(&bus->vtable_methods, &vtable_member_hash_ops); |
992c052c LP |
1664 | if (r < 0) |
1665 | return r; | |
1666 | ||
d5099efc | 1667 | r = hashmap_ensure_allocated(&bus->vtable_properties, &vtable_member_hash_ops); |
992c052c LP |
1668 | if (r < 0) |
1669 | return r; | |
1670 | ||
1671 | n = bus_node_allocate(bus, path); | |
1672 | if (!n) | |
1673 | return -ENOMEM; | |
1674 | ||
1675 | LIST_FOREACH(vtables, i, n->vtables) { | |
992c052c LP |
1676 | if (i->is_fallback != fallback) { |
1677 | r = -EPROTOTYPE; | |
1678 | goto fail; | |
1679 | } | |
718db961 LP |
1680 | |
1681 | if (streq(i->interface, interface)) { | |
1682 | ||
1683 | if (i->vtable == vtable) { | |
1684 | r = -EEXIST; | |
1685 | goto fail; | |
1686 | } | |
1687 | ||
1688 | existing = i; | |
1689 | } | |
992c052c LP |
1690 | } |
1691 | ||
19befb2d LP |
1692 | s = bus_slot_allocate(bus, !slot, BUS_NODE_VTABLE, sizeof(struct node_vtable), userdata); |
1693 | if (!s) { | |
992c052c LP |
1694 | r = -ENOMEM; |
1695 | goto fail; | |
1696 | } | |
1697 | ||
19befb2d LP |
1698 | s->node_vtable.is_fallback = fallback; |
1699 | s->node_vtable.vtable = vtable; | |
1700 | s->node_vtable.find = find; | |
992c052c | 1701 | |
19befb2d LP |
1702 | s->node_vtable.interface = strdup(interface); |
1703 | if (!s->node_vtable.interface) { | |
992c052c LP |
1704 | r = -ENOMEM; |
1705 | goto fail; | |
1706 | } | |
1707 | ||
19befb2d | 1708 | for (v = s->node_vtable.vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
992c052c LP |
1709 | |
1710 | switch (v->type) { | |
1711 | ||
1712 | case _SD_BUS_VTABLE_METHOD: { | |
1713 | struct vtable_member *m; | |
1714 | ||
77a874a3 LP |
1715 | if (!member_name_is_valid(v->x.method.member) || |
1716 | !signature_is_valid(strempty(v->x.method.signature), false) || | |
1717 | !signature_is_valid(strempty(v->x.method.result), false) || | |
1718 | !(v->x.method.handler || (isempty(v->x.method.signature) && isempty(v->x.method.result))) || | |
df98a87b | 1719 | v->flags & (SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) { |
992c052c LP |
1720 | r = -EINVAL; |
1721 | goto fail; | |
1722 | } | |
1723 | ||
1724 | m = new0(struct vtable_member, 1); | |
1725 | if (!m) { | |
1726 | r = -ENOMEM; | |
1727 | goto fail; | |
1728 | } | |
1729 | ||
19befb2d | 1730 | m->parent = &s->node_vtable; |
992c052c | 1731 | m->path = n->path; |
19befb2d | 1732 | m->interface = s->node_vtable.interface; |
77a874a3 | 1733 | m->member = v->x.method.member; |
992c052c LP |
1734 | m->vtable = v; |
1735 | ||
1736 | r = hashmap_put(bus->vtable_methods, m, m); | |
1737 | if (r < 0) { | |
1738 | free(m); | |
1739 | goto fail; | |
1740 | } | |
1741 | ||
1742 | break; | |
1743 | } | |
1744 | ||
1745 | case _SD_BUS_VTABLE_WRITABLE_PROPERTY: | |
1746 | ||
77a874a3 | 1747 | if (!(v->x.property.set || bus_type_is_basic(v->x.property.signature[0]))) { |
992c052c LP |
1748 | r = -EINVAL; |
1749 | goto fail; | |
1750 | } | |
9b772efb LP |
1751 | |
1752 | if (v->flags & SD_BUS_VTABLE_PROPERTY_CONST) { | |
1753 | r = -EINVAL; | |
1754 | goto fail; | |
1755 | } | |
992c052c LP |
1756 | |
1757 | /* Fall through */ | |
1758 | ||
1759 | case _SD_BUS_VTABLE_PROPERTY: { | |
1760 | struct vtable_member *m; | |
1761 | ||
77a874a3 LP |
1762 | if (!member_name_is_valid(v->x.property.member) || |
1763 | !signature_is_single(v->x.property.signature, false) || | |
c13c7de3 | 1764 | !(v->x.property.get || bus_type_is_basic(v->x.property.signature[0]) || streq(v->x.property.signature, "as")) || |
33702051 | 1765 | (v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY) || |
df98a87b | 1766 | (!!(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 | 1767 | ((v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) && (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT)) || |
adacb957 | 1768 | (v->flags & SD_BUS_VTABLE_UNPRIVILEGED && v->type == _SD_BUS_VTABLE_PROPERTY)) { |
992c052c LP |
1769 | r = -EINVAL; |
1770 | goto fail; | |
1771 | } | |
1772 | ||
992c052c LP |
1773 | m = new0(struct vtable_member, 1); |
1774 | if (!m) { | |
1775 | r = -ENOMEM; | |
1776 | goto fail; | |
1777 | } | |
1778 | ||
19befb2d | 1779 | m->parent = &s->node_vtable; |
992c052c | 1780 | m->path = n->path; |
19befb2d | 1781 | m->interface = s->node_vtable.interface; |
77a874a3 | 1782 | m->member = v->x.property.member; |
992c052c LP |
1783 | m->vtable = v; |
1784 | ||
1785 | r = hashmap_put(bus->vtable_properties, m, m); | |
1786 | if (r < 0) { | |
1787 | free(m); | |
1788 | goto fail; | |
1789 | } | |
1790 | ||
1791 | break; | |
1792 | } | |
1793 | ||
1794 | case _SD_BUS_VTABLE_SIGNAL: | |
1795 | ||
77a874a3 | 1796 | if (!member_name_is_valid(v->x.signal.member) || |
adacb957 LP |
1797 | !signature_is_valid(strempty(v->x.signal.signature), false) || |
1798 | v->flags & SD_BUS_VTABLE_UNPRIVILEGED) { | |
992c052c LP |
1799 | r = -EINVAL; |
1800 | goto fail; | |
1801 | } | |
1802 | ||
1803 | break; | |
1804 | ||
1805 | default: | |
1806 | r = -EINVAL; | |
1807 | goto fail; | |
1808 | } | |
1809 | } | |
1810 | ||
19befb2d LP |
1811 | s->node_vtable.node = n; |
1812 | LIST_INSERT_AFTER(vtables, n->vtables, existing, &s->node_vtable); | |
68313d3d LP |
1813 | bus->nodes_modified = true; |
1814 | ||
19befb2d LP |
1815 | if (slot) |
1816 | *slot = s; | |
1817 | ||
992c052c LP |
1818 | return 0; |
1819 | ||
1820 | fail: | |
19befb2d | 1821 | sd_bus_slot_unref(s); |
dfa92725 LP |
1822 | bus_node_gc(bus, n); |
1823 | ||
19befb2d | 1824 | return r; |
992c052c LP |
1825 | } |
1826 | ||
d9f644e2 | 1827 | _public_ int sd_bus_add_object_vtable( |
992c052c | 1828 | sd_bus *bus, |
19befb2d | 1829 | sd_bus_slot **slot, |
992c052c LP |
1830 | const char *path, |
1831 | const char *interface, | |
1832 | const sd_bus_vtable *vtable, | |
1833 | void *userdata) { | |
1834 | ||
19befb2d | 1835 | return add_object_vtable_internal(bus, slot, path, interface, vtable, false, NULL, userdata); |
992c052c LP |
1836 | } |
1837 | ||
d9f644e2 | 1838 | _public_ int sd_bus_add_fallback_vtable( |
992c052c | 1839 | sd_bus *bus, |
19befb2d LP |
1840 | sd_bus_slot **slot, |
1841 | const char *prefix, | |
718db961 LP |
1842 | const char *interface, |
1843 | const sd_bus_vtable *vtable, | |
1844 | sd_bus_object_find_t find, | |
1845 | void *userdata) { | |
992c052c | 1846 | |
19befb2d | 1847 | return add_object_vtable_internal(bus, slot, prefix, interface, vtable, true, find, userdata); |
992c052c LP |
1848 | } |
1849 | ||
d9f644e2 | 1850 | _public_ int sd_bus_add_node_enumerator( |
992c052c | 1851 | sd_bus *bus, |
19befb2d | 1852 | sd_bus_slot **slot, |
992c052c LP |
1853 | const char *path, |
1854 | sd_bus_node_enumerator_t callback, | |
1855 | void *userdata) { | |
1856 | ||
19befb2d | 1857 | sd_bus_slot *s; |
992c052c LP |
1858 | struct node *n; |
1859 | int r; | |
1860 | ||
dfa92725 LP |
1861 | assert_return(bus, -EINVAL); |
1862 | assert_return(object_path_is_valid(path), -EINVAL); | |
1863 | assert_return(callback, -EINVAL); | |
1864 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c LP |
1865 | |
1866 | n = bus_node_allocate(bus, path); | |
1867 | if (!n) | |
1868 | return -ENOMEM; | |
1869 | ||
19befb2d LP |
1870 | s = bus_slot_allocate(bus, !slot, BUS_NODE_ENUMERATOR, sizeof(struct node_enumerator), userdata); |
1871 | if (!s) { | |
992c052c LP |
1872 | r = -ENOMEM; |
1873 | goto fail; | |
1874 | } | |
1875 | ||
19befb2d | 1876 | s->node_enumerator.callback = callback; |
68313d3d | 1877 | |
19befb2d LP |
1878 | s->node_enumerator.node = n; |
1879 | LIST_PREPEND(enumerators, n->enumerators, &s->node_enumerator); | |
68313d3d LP |
1880 | bus->nodes_modified = true; |
1881 | ||
19befb2d LP |
1882 | if (slot) |
1883 | *slot = s; | |
1884 | ||
992c052c LP |
1885 | return 0; |
1886 | ||
1887 | fail: | |
19befb2d | 1888 | sd_bus_slot_unref(s); |
992c052c LP |
1889 | bus_node_gc(bus, n); |
1890 | ||
19befb2d | 1891 | return r; |
992c052c LP |
1892 | } |
1893 | ||
1894 | static int emit_properties_changed_on_interface( | |
1895 | sd_bus *bus, | |
1896 | const char *prefix, | |
1897 | const char *path, | |
1898 | const char *interface, | |
1899 | bool require_fallback, | |
46525bfc | 1900 | bool *found_interface, |
992c052c LP |
1901 | char **names) { |
1902 | ||
4afd3348 LP |
1903 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
1904 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
718db961 LP |
1905 | bool has_invalidating = false, has_changing = false; |
1906 | struct vtable_member key = {}; | |
992c052c LP |
1907 | struct node_vtable *c; |
1908 | struct node *n; | |
1909 | char **property; | |
1910 | void *u = NULL; | |
1911 | int r; | |
1912 | ||
1913 | assert(bus); | |
dfa92725 | 1914 | assert(prefix); |
992c052c LP |
1915 | assert(path); |
1916 | assert(interface); | |
46525bfc | 1917 | assert(found_interface); |
992c052c LP |
1918 | |
1919 | n = hashmap_get(bus->nodes, prefix); | |
1920 | if (!n) | |
1921 | return 0; | |
1922 | ||
151b9b96 | 1923 | r = sd_bus_message_new_signal(bus, &m, path, "org.freedesktop.DBus.Properties", "PropertiesChanged"); |
992c052c LP |
1924 | if (r < 0) |
1925 | return r; | |
1926 | ||
1927 | r = sd_bus_message_append(m, "s", interface); | |
1928 | if (r < 0) | |
1929 | return r; | |
1930 | ||
1931 | r = sd_bus_message_open_container(m, 'a', "{sv}"); | |
1932 | if (r < 0) | |
1933 | return r; | |
1934 | ||
1935 | key.path = prefix; | |
1936 | key.interface = interface; | |
1937 | ||
718db961 LP |
1938 | LIST_FOREACH(vtables, c, n->vtables) { |
1939 | if (require_fallback && !c->is_fallback) | |
1940 | continue; | |
992c052c | 1941 | |
718db961 | 1942 | if (!streq(c->interface, interface)) |
992c052c | 1943 | continue; |
992c052c | 1944 | |
f00c3121 | 1945 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
992c052c LP |
1946 | if (r < 0) |
1947 | return r; | |
718db961 LP |
1948 | if (bus->nodes_modified) |
1949 | return 0; | |
1950 | if (r == 0) | |
1951 | continue; | |
992c052c | 1952 | |
46525bfc LP |
1953 | *found_interface = true; |
1954 | ||
a03e4337 LP |
1955 | if (names) { |
1956 | /* If the caller specified a list of | |
1957 | * properties we include exactly those in the | |
1958 | * PropertiesChanged message */ | |
992c052c | 1959 | |
a03e4337 LP |
1960 | STRV_FOREACH(property, names) { |
1961 | struct vtable_member *v; | |
992c052c | 1962 | |
a03e4337 | 1963 | assert_return(member_name_is_valid(*property), -EINVAL); |
718db961 | 1964 | |
a03e4337 LP |
1965 | key.member = *property; |
1966 | v = hashmap_get(bus->vtable_properties, &key); | |
1967 | if (!v) | |
1968 | return -ENOENT; | |
1969 | ||
1970 | /* If there are two vtables for the same | |
1971 | * interface, let's handle this property when | |
1972 | * we come to that vtable. */ | |
1973 | if (c != v->parent) | |
1974 | continue; | |
992c052c | 1975 | |
a03e4337 LP |
1976 | assert_return(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE || |
1977 | v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION, -EDOM); | |
992c052c | 1978 | |
a03e4337 LP |
1979 | assert_return(!(v->vtable->flags & SD_BUS_VTABLE_HIDDEN), -EDOM); |
1980 | ||
1981 | if (v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) { | |
1982 | has_invalidating = true; | |
1983 | continue; | |
1984 | } | |
1985 | ||
1986 | has_changing = true; | |
1987 | ||
1988 | r = vtable_append_one_property(bus, m, m->path, c, v->vtable, u, &error); | |
1989 | if (r < 0) | |
1990 | return r; | |
1991 | if (bus->nodes_modified) | |
1992 | return 0; | |
718db961 | 1993 | } |
a03e4337 LP |
1994 | } else { |
1995 | const sd_bus_vtable *v; | |
718db961 | 1996 | |
a03e4337 LP |
1997 | /* If the caller specified no properties list |
1998 | * we include all properties that are marked | |
1999 | * as changing in the message. */ | |
718db961 | 2000 | |
a03e4337 LP |
2001 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
2002 | if (v->type != _SD_BUS_VTABLE_PROPERTY && v->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) | |
2003 | continue; | |
718db961 | 2004 | |
a03e4337 LP |
2005 | if (v->flags & SD_BUS_VTABLE_HIDDEN) |
2006 | continue; | |
718db961 | 2007 | |
a03e4337 LP |
2008 | if (v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) { |
2009 | has_invalidating = true; | |
2010 | continue; | |
2011 | } | |
718db961 | 2012 | |
a03e4337 LP |
2013 | if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE)) |
2014 | continue; | |
718db961 | 2015 | |
a03e4337 | 2016 | has_changing = true; |
718db961 | 2017 | |
a03e4337 LP |
2018 | r = vtable_append_one_property(bus, m, m->path, c, v, u, &error); |
2019 | if (r < 0) | |
2020 | return r; | |
2021 | if (bus->nodes_modified) | |
2022 | return 0; | |
2023 | } | |
718db961 | 2024 | } |
992c052c LP |
2025 | } |
2026 | ||
718db961 LP |
2027 | if (!has_invalidating && !has_changing) |
2028 | return 0; | |
2029 | ||
992c052c LP |
2030 | r = sd_bus_message_close_container(m); |
2031 | if (r < 0) | |
2032 | return r; | |
2033 | ||
2034 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2035 | if (r < 0) | |
2036 | return r; | |
2037 | ||
2038 | if (has_invalidating) { | |
718db961 LP |
2039 | LIST_FOREACH(vtables, c, n->vtables) { |
2040 | if (require_fallback && !c->is_fallback) | |
2041 | continue; | |
992c052c | 2042 | |
718db961 | 2043 | if (!streq(c->interface, interface)) |
992c052c LP |
2044 | continue; |
2045 | ||
f00c3121 | 2046 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
992c052c LP |
2047 | if (r < 0) |
2048 | return r; | |
718db961 LP |
2049 | if (bus->nodes_modified) |
2050 | return 0; | |
2051 | if (r == 0) | |
2052 | continue; | |
2053 | ||
a03e4337 LP |
2054 | if (names) { |
2055 | STRV_FOREACH(property, names) { | |
2056 | struct vtable_member *v; | |
718db961 | 2057 | |
a03e4337 LP |
2058 | key.member = *property; |
2059 | assert_se(v = hashmap_get(bus->vtable_properties, &key)); | |
2060 | assert(c == v->parent); | |
718db961 | 2061 | |
a03e4337 LP |
2062 | if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) |
2063 | continue; | |
718db961 | 2064 | |
a03e4337 LP |
2065 | r = sd_bus_message_append(m, "s", *property); |
2066 | if (r < 0) | |
2067 | return r; | |
2068 | } | |
2069 | } else { | |
2070 | const sd_bus_vtable *v; | |
2071 | ||
2072 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { | |
2073 | if (v->type != _SD_BUS_VTABLE_PROPERTY && v->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) | |
2074 | continue; | |
2075 | ||
2076 | if (v->flags & SD_BUS_VTABLE_HIDDEN) | |
2077 | continue; | |
2078 | ||
2079 | if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) | |
2080 | continue; | |
2081 | ||
2082 | r = sd_bus_message_append(m, "s", v->x.property.member); | |
2083 | if (r < 0) | |
2084 | return r; | |
2085 | } | |
718db961 | 2086 | } |
992c052c LP |
2087 | } |
2088 | } | |
2089 | ||
2090 | r = sd_bus_message_close_container(m); | |
2091 | if (r < 0) | |
2092 | return r; | |
2093 | ||
2094 | r = sd_bus_send(bus, m, NULL); | |
2095 | if (r < 0) | |
2096 | return r; | |
2097 | ||
2098 | return 1; | |
2099 | } | |
2100 | ||
d9f644e2 | 2101 | _public_ int sd_bus_emit_properties_changed_strv( |
dfa92725 LP |
2102 | sd_bus *bus, |
2103 | const char *path, | |
2104 | const char *interface, | |
2105 | char **names) { | |
2106 | ||
8ce2afd6 | 2107 | BUS_DONT_DESTROY(bus); |
46525bfc | 2108 | bool found_interface = false; |
92e189e5 | 2109 | char *prefix; |
992c052c LP |
2110 | int r; |
2111 | ||
dfa92725 LP |
2112 | assert_return(bus, -EINVAL); |
2113 | assert_return(object_path_is_valid(path), -EINVAL); | |
2114 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
dfa92725 LP |
2115 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2116 | ||
a3d59cd1 LP |
2117 | if (!BUS_IS_OPEN(bus->state)) |
2118 | return -ENOTCONN; | |
a03e4337 LP |
2119 | |
2120 | /* A non-NULL but empty names list means nothing needs to be | |
2121 | generated. A NULL list OTOH indicates that all properties | |
2122 | that are set to EMITS_CHANGE or EMITS_INVALIDATION shall be | |
2123 | included in the PropertiesChanged message. */ | |
2124 | if (names && names[0] == NULL) | |
dfa92725 | 2125 | return 0; |
992c052c | 2126 | |
68313d3d LP |
2127 | do { |
2128 | bus->nodes_modified = false; | |
992c052c | 2129 | |
46525bfc | 2130 | r = emit_properties_changed_on_interface(bus, path, path, interface, false, &found_interface, names); |
92e189e5 LP |
2131 | if (r != 0) |
2132 | return r; | |
68313d3d LP |
2133 | if (bus->nodes_modified) |
2134 | continue; | |
2135 | ||
2136 | prefix = alloca(strlen(path) + 1); | |
2137 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
46525bfc | 2138 | r = emit_properties_changed_on_interface(bus, prefix, path, interface, true, &found_interface, names); |
68313d3d LP |
2139 | if (r != 0) |
2140 | return r; | |
2141 | if (bus->nodes_modified) | |
2142 | break; | |
2143 | } | |
2144 | ||
2145 | } while (bus->nodes_modified); | |
992c052c | 2146 | |
46525bfc | 2147 | return found_interface ? 0 : -ENOENT; |
992c052c LP |
2148 | } |
2149 | ||
d9f644e2 | 2150 | _public_ int sd_bus_emit_properties_changed( |
dfa92725 LP |
2151 | sd_bus *bus, |
2152 | const char *path, | |
2153 | const char *interface, | |
2154 | const char *name, ...) { | |
2155 | ||
250a918d | 2156 | char **names; |
992c052c | 2157 | |
dfa92725 LP |
2158 | assert_return(bus, -EINVAL); |
2159 | assert_return(object_path_is_valid(path), -EINVAL); | |
2160 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
dfa92725 LP |
2161 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2162 | ||
a3d59cd1 LP |
2163 | if (!BUS_IS_OPEN(bus->state)) |
2164 | return -ENOTCONN; | |
2165 | ||
dfa92725 LP |
2166 | if (!name) |
2167 | return 0; | |
2168 | ||
250a918d | 2169 | names = strv_from_stdarg_alloca(name); |
992c052c LP |
2170 | |
2171 | return sd_bus_emit_properties_changed_strv(bus, path, interface, names); | |
2172 | } | |
2173 | ||
d95eb43e DH |
2174 | static int object_added_append_all_prefix( |
2175 | sd_bus *bus, | |
2176 | sd_bus_message *m, | |
2177 | Set *s, | |
2178 | const char *prefix, | |
2179 | const char *path, | |
2180 | bool require_fallback) { | |
2181 | ||
2182 | const char *previous_interface = NULL; | |
2183 | struct node_vtable *c; | |
2184 | struct node *n; | |
2185 | int r; | |
2186 | ||
2187 | assert(bus); | |
2188 | assert(m); | |
2189 | assert(s); | |
2190 | assert(prefix); | |
2191 | assert(path); | |
2192 | ||
2193 | n = hashmap_get(bus->nodes, prefix); | |
2194 | if (!n) | |
2195 | return 0; | |
2196 | ||
2197 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 2198 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
d95eb43e DH |
2199 | void *u = NULL; |
2200 | ||
2201 | if (require_fallback && !c->is_fallback) | |
2202 | continue; | |
2203 | ||
2204 | r = node_vtable_get_userdata(bus, path, c, &u, &error); | |
2205 | if (r < 0) | |
2206 | return r; | |
2207 | if (bus->nodes_modified) | |
2208 | return 0; | |
2209 | if (r == 0) | |
2210 | continue; | |
2211 | ||
2212 | if (!streq_ptr(c->interface, previous_interface)) { | |
2213 | /* If a child-node already handled this interface, we | |
2214 | * skip it on any of its parents. The child vtables | |
2215 | * always fully override any conflicting vtables of | |
2216 | * any parent node. */ | |
2217 | if (set_get(s, c->interface)) | |
2218 | continue; | |
2219 | ||
2220 | r = set_put(s, c->interface); | |
2221 | if (r < 0) | |
2222 | return r; | |
2223 | ||
2224 | if (previous_interface) { | |
2225 | r = sd_bus_message_close_container(m); | |
2226 | if (r < 0) | |
2227 | return r; | |
2228 | r = sd_bus_message_close_container(m); | |
2229 | if (r < 0) | |
2230 | return r; | |
2231 | } | |
2232 | ||
2233 | r = sd_bus_message_open_container(m, 'e', "sa{sv}"); | |
2234 | if (r < 0) | |
2235 | return r; | |
2236 | r = sd_bus_message_append(m, "s", c->interface); | |
2237 | if (r < 0) | |
2238 | return r; | |
2239 | r = sd_bus_message_open_container(m, 'a', "{sv}"); | |
2240 | if (r < 0) | |
2241 | return r; | |
2242 | ||
2243 | previous_interface = c->interface; | |
2244 | } | |
2245 | ||
2246 | r = vtable_append_all_properties(bus, m, path, c, u, &error); | |
2247 | if (r < 0) | |
2248 | return r; | |
2249 | if (bus->nodes_modified) | |
2250 | return 0; | |
2251 | } | |
2252 | ||
2253 | if (previous_interface) { | |
2254 | r = sd_bus_message_close_container(m); | |
2255 | if (r < 0) | |
2256 | return r; | |
2257 | r = sd_bus_message_close_container(m); | |
2258 | if (r < 0) | |
2259 | return r; | |
2260 | } | |
2261 | ||
2262 | return 0; | |
2263 | } | |
2264 | ||
2265 | static int object_added_append_all(sd_bus *bus, sd_bus_message *m, const char *path) { | |
2266 | _cleanup_set_free_ Set *s = NULL; | |
2267 | char *prefix; | |
2268 | int r; | |
2269 | ||
2270 | assert(bus); | |
2271 | assert(m); | |
2272 | assert(path); | |
2273 | ||
2274 | /* | |
2275 | * This appends all interfaces registered on path @path. We first add | |
2276 | * the builtin interfaces, which are always available and handled by | |
2277 | * sd-bus. Then, we add all interfaces registered on the exact node, | |
2278 | * followed by all fallback interfaces registered on any parent prefix. | |
2279 | * | |
2280 | * If an interface is registered multiple times on the same node with | |
2281 | * different vtables, we merge all the properties across all vtables. | |
2282 | * However, if a child node has the same interface registered as one of | |
2283 | * its parent nodes has as fallback, we make the child overwrite the | |
2284 | * parent instead of extending it. Therefore, we keep a "Set" of all | |
2285 | * handled interfaces during parent traversal, so we skip interfaces on | |
2286 | * a parent that were overwritten by a child. | |
2287 | */ | |
2288 | ||
2289 | s = set_new(&string_hash_ops); | |
2290 | if (!s) | |
2291 | return -ENOMEM; | |
2292 | ||
2293 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Peer", 0); | |
2294 | if (r < 0) | |
2295 | return r; | |
2296 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Introspectable", 0); | |
2297 | if (r < 0) | |
2298 | return r; | |
2299 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Properties", 0); | |
2300 | if (r < 0) | |
2301 | return r; | |
2302 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.ObjectManager", 0); | |
2303 | if (r < 0) | |
2304 | return r; | |
2305 | ||
2306 | r = object_added_append_all_prefix(bus, m, s, path, path, false); | |
2307 | if (r < 0) | |
2308 | return r; | |
2309 | if (bus->nodes_modified) | |
2310 | return 0; | |
2311 | ||
2312 | prefix = alloca(strlen(path) + 1); | |
2313 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2314 | r = object_added_append_all_prefix(bus, m, s, prefix, path, true); | |
2315 | if (r < 0) | |
2316 | return r; | |
2317 | if (bus->nodes_modified) | |
2318 | return 0; | |
2319 | } | |
2320 | ||
2321 | return 0; | |
2322 | } | |
2323 | ||
969a9685 | 2324 | _public_ int sd_bus_emit_object_added(sd_bus *bus, const char *path) { |
d95eb43e DH |
2325 | BUS_DONT_DESTROY(bus); |
2326 | ||
4afd3348 | 2327 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2328 | struct node *object_manager; |
d95eb43e DH |
2329 | int r; |
2330 | ||
2331 | /* | |
2332 | * This emits an InterfacesAdded signal on the given path, by iterating | |
2333 | * all registered vtables and fallback vtables on the path. All | |
2334 | * properties are queried and included in the signal. | |
2335 | * This call is equivalent to sd_bus_emit_interfaces_added() with an | |
2336 | * explicit list of registered interfaces. However, unlike | |
2337 | * interfaces_added(), this call can figure out the list of supported | |
2338 | * interfaces itself. Furthermore, it properly adds the builtin | |
2339 | * org.freedesktop.DBus.* interfaces. | |
2340 | */ | |
2341 | ||
2342 | assert_return(bus, -EINVAL); | |
2343 | assert_return(object_path_is_valid(path), -EINVAL); | |
2344 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2345 | ||
2346 | if (!BUS_IS_OPEN(bus->state)) | |
2347 | return -ENOTCONN; | |
2348 | ||
2d5c8a27 DH |
2349 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2350 | if (r < 0) | |
2351 | return r; | |
2352 | if (r == 0) | |
2353 | return -ESRCH; | |
2354 | ||
d95eb43e DH |
2355 | do { |
2356 | bus->nodes_modified = false; | |
2357 | m = sd_bus_message_unref(m); | |
2358 | ||
2d5c8a27 | 2359 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded"); |
d95eb43e DH |
2360 | if (r < 0) |
2361 | return r; | |
2362 | ||
2363 | r = sd_bus_message_append_basic(m, 'o', path); | |
2364 | if (r < 0) | |
2365 | return r; | |
2366 | ||
2367 | r = sd_bus_message_open_container(m, 'a', "{sa{sv}}"); | |
2368 | if (r < 0) | |
2369 | return r; | |
2370 | ||
2371 | r = object_added_append_all(bus, m, path); | |
2372 | if (r < 0) | |
2373 | return r; | |
2374 | ||
2375 | if (bus->nodes_modified) | |
2376 | continue; | |
2377 | ||
2378 | r = sd_bus_message_close_container(m); | |
2379 | if (r < 0) | |
2380 | return r; | |
2381 | ||
2382 | } while (bus->nodes_modified); | |
2383 | ||
2384 | return sd_bus_send(bus, m, NULL); | |
2385 | } | |
2386 | ||
2387 | static int object_removed_append_all_prefix( | |
2388 | sd_bus *bus, | |
2389 | sd_bus_message *m, | |
2390 | Set *s, | |
2391 | const char *prefix, | |
2392 | const char *path, | |
2393 | bool require_fallback) { | |
2394 | ||
2395 | const char *previous_interface = NULL; | |
2396 | struct node_vtable *c; | |
2397 | struct node *n; | |
2398 | int r; | |
2399 | ||
2400 | assert(bus); | |
2401 | assert(m); | |
2402 | assert(s); | |
2403 | assert(prefix); | |
2404 | assert(path); | |
2405 | ||
2406 | n = hashmap_get(bus->nodes, prefix); | |
2407 | if (!n) | |
2408 | return 0; | |
2409 | ||
2410 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 2411 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
d95eb43e DH |
2412 | void *u = NULL; |
2413 | ||
2414 | if (require_fallback && !c->is_fallback) | |
2415 | continue; | |
2416 | if (streq_ptr(c->interface, previous_interface)) | |
2417 | continue; | |
2418 | ||
2419 | /* If a child-node already handled this interface, we | |
2420 | * skip it on any of its parents. The child vtables | |
2421 | * always fully override any conflicting vtables of | |
2422 | * any parent node. */ | |
2423 | if (set_get(s, c->interface)) | |
2424 | continue; | |
2425 | ||
2426 | r = node_vtable_get_userdata(bus, path, c, &u, &error); | |
2427 | if (r < 0) | |
2428 | return r; | |
2429 | if (bus->nodes_modified) | |
2430 | return 0; | |
2431 | if (r == 0) | |
2432 | continue; | |
2433 | ||
2434 | r = set_put(s, c->interface); | |
2435 | if (r < 0) | |
2436 | return r; | |
2437 | ||
2438 | r = sd_bus_message_append(m, "s", c->interface); | |
2439 | if (r < 0) | |
2440 | return r; | |
2441 | ||
2442 | previous_interface = c->interface; | |
2443 | } | |
2444 | ||
2445 | return 0; | |
2446 | } | |
2447 | ||
2448 | static int object_removed_append_all(sd_bus *bus, sd_bus_message *m, const char *path) { | |
2449 | _cleanup_set_free_ Set *s = NULL; | |
2450 | char *prefix; | |
2451 | int r; | |
2452 | ||
2453 | assert(bus); | |
2454 | assert(m); | |
2455 | assert(path); | |
2456 | ||
2457 | /* see sd_bus_emit_object_added() for details */ | |
2458 | ||
2459 | s = set_new(&string_hash_ops); | |
2460 | if (!s) | |
2461 | return -ENOMEM; | |
2462 | ||
2463 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Peer"); | |
2464 | if (r < 0) | |
2465 | return r; | |
2466 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Introspectable"); | |
2467 | if (r < 0) | |
2468 | return r; | |
2469 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Properties"); | |
2470 | if (r < 0) | |
2471 | return r; | |
2472 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.ObjectManager"); | |
2473 | if (r < 0) | |
2474 | return r; | |
2475 | ||
2476 | r = object_removed_append_all_prefix(bus, m, s, path, path, false); | |
2477 | if (r < 0) | |
2478 | return r; | |
2479 | if (bus->nodes_modified) | |
2480 | return 0; | |
2481 | ||
2482 | prefix = alloca(strlen(path) + 1); | |
2483 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2484 | r = object_removed_append_all_prefix(bus, m, s, prefix, path, true); | |
2485 | if (r < 0) | |
2486 | return r; | |
2487 | if (bus->nodes_modified) | |
2488 | return 0; | |
2489 | } | |
2490 | ||
2491 | return 0; | |
2492 | } | |
2493 | ||
969a9685 | 2494 | _public_ int sd_bus_emit_object_removed(sd_bus *bus, const char *path) { |
d95eb43e DH |
2495 | BUS_DONT_DESTROY(bus); |
2496 | ||
4afd3348 | 2497 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2498 | struct node *object_manager; |
d95eb43e DH |
2499 | int r; |
2500 | ||
2501 | /* | |
2502 | * This is like sd_bus_emit_object_added(), but emits an | |
2503 | * InterfacesRemoved signal on the given path. This only includes any | |
2504 | * registered interfaces but skips the properties. Note that this will | |
2505 | * call into the find() callbacks of any registered vtable. Therefore, | |
2506 | * you must call this function before destroying/unlinking your object. | |
2507 | * Otherwise, the list of interfaces will be incomplete. However, note | |
2508 | * that this will *NOT* call into any property callback. Therefore, the | |
2509 | * object might be in an "destructed" state, as long as we can find it. | |
2510 | */ | |
2511 | ||
2512 | assert_return(bus, -EINVAL); | |
2513 | assert_return(object_path_is_valid(path), -EINVAL); | |
2514 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2515 | ||
2516 | if (!BUS_IS_OPEN(bus->state)) | |
2517 | return -ENOTCONN; | |
2518 | ||
2d5c8a27 DH |
2519 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2520 | if (r < 0) | |
2521 | return r; | |
2522 | if (r == 0) | |
2523 | return -ESRCH; | |
2524 | ||
d95eb43e DH |
2525 | do { |
2526 | bus->nodes_modified = false; | |
2527 | m = sd_bus_message_unref(m); | |
2528 | ||
2d5c8a27 | 2529 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved"); |
d95eb43e DH |
2530 | if (r < 0) |
2531 | return r; | |
2532 | ||
2533 | r = sd_bus_message_append_basic(m, 'o', path); | |
2534 | if (r < 0) | |
2535 | return r; | |
2536 | ||
2537 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2538 | if (r < 0) | |
2539 | return r; | |
2540 | ||
2541 | r = object_removed_append_all(bus, m, path); | |
2542 | if (r < 0) | |
2543 | return r; | |
2544 | ||
2545 | if (bus->nodes_modified) | |
2546 | continue; | |
2547 | ||
2548 | r = sd_bus_message_close_container(m); | |
2549 | if (r < 0) | |
2550 | return r; | |
2551 | ||
2552 | } while (bus->nodes_modified); | |
2553 | ||
2554 | return sd_bus_send(bus, m, NULL); | |
2555 | } | |
2556 | ||
4be39163 LP |
2557 | static int interfaces_added_append_one_prefix( |
2558 | sd_bus *bus, | |
2559 | sd_bus_message *m, | |
2560 | const char *prefix, | |
2561 | const char *path, | |
2562 | const char *interface, | |
2563 | bool require_fallback) { | |
2564 | ||
4afd3348 | 2565 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
718db961 | 2566 | bool found_interface = false; |
4be39163 LP |
2567 | struct node_vtable *c; |
2568 | struct node *n; | |
2569 | void *u = NULL; | |
2570 | int r; | |
2571 | ||
2572 | assert(bus); | |
2573 | assert(m); | |
2574 | assert(prefix); | |
2575 | assert(path); | |
2576 | assert(interface); | |
2577 | ||
2578 | n = hashmap_get(bus->nodes, prefix); | |
2579 | if (!n) | |
2580 | return 0; | |
2581 | ||
2582 | LIST_FOREACH(vtables, c, n->vtables) { | |
2583 | if (require_fallback && !c->is_fallback) | |
2584 | continue; | |
2585 | ||
718db961 LP |
2586 | if (!streq(c->interface, interface)) |
2587 | continue; | |
4be39163 | 2588 | |
f00c3121 | 2589 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
718db961 LP |
2590 | if (r < 0) |
2591 | return r; | |
2592 | if (bus->nodes_modified) | |
2593 | return 0; | |
2594 | if (r == 0) | |
2595 | continue; | |
4be39163 | 2596 | |
718db961 LP |
2597 | if (!found_interface) { |
2598 | r = sd_bus_message_append_basic(m, 's', interface); | |
2599 | if (r < 0) | |
2600 | return r; | |
4be39163 | 2601 | |
718db961 LP |
2602 | r = sd_bus_message_open_container(m, 'a', "{sv}"); |
2603 | if (r < 0) | |
2604 | return r; | |
4be39163 | 2605 | |
718db961 LP |
2606 | found_interface = true; |
2607 | } | |
4be39163 | 2608 | |
718db961 LP |
2609 | r = vtable_append_all_properties(bus, m, path, c, u, &error); |
2610 | if (r < 0) | |
2611 | return r; | |
2612 | if (bus->nodes_modified) | |
2613 | return 0; | |
2614 | } | |
4be39163 | 2615 | |
718db961 LP |
2616 | if (found_interface) { |
2617 | r = sd_bus_message_close_container(m); | |
2618 | if (r < 0) | |
2619 | return r; | |
2620 | } | |
4be39163 | 2621 | |
718db961 | 2622 | return found_interface; |
4be39163 LP |
2623 | } |
2624 | ||
2625 | static int interfaces_added_append_one( | |
2626 | sd_bus *bus, | |
2627 | sd_bus_message *m, | |
2628 | const char *path, | |
2629 | const char *interface) { | |
2630 | ||
2631 | char *prefix; | |
2632 | int r; | |
2633 | ||
2634 | assert(bus); | |
2635 | assert(m); | |
2636 | assert(path); | |
2637 | assert(interface); | |
2638 | ||
2639 | r = interfaces_added_append_one_prefix(bus, m, path, path, interface, false); | |
2640 | if (r != 0) | |
2641 | return r; | |
68313d3d LP |
2642 | if (bus->nodes_modified) |
2643 | return 0; | |
4be39163 LP |
2644 | |
2645 | prefix = alloca(strlen(path) + 1); | |
2646 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2647 | r = interfaces_added_append_one_prefix(bus, m, prefix, path, interface, true); | |
2648 | if (r != 0) | |
2649 | return r; | |
68313d3d LP |
2650 | if (bus->nodes_modified) |
2651 | return 0; | |
4be39163 LP |
2652 | } |
2653 | ||
2654 | return -ENOENT; | |
992c052c LP |
2655 | } |
2656 | ||
d9f644e2 | 2657 | _public_ int sd_bus_emit_interfaces_added_strv(sd_bus *bus, const char *path, char **interfaces) { |
8ce2afd6 LP |
2658 | BUS_DONT_DESTROY(bus); |
2659 | ||
4afd3348 | 2660 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2661 | struct node *object_manager; |
4be39163 LP |
2662 | char **i; |
2663 | int r; | |
2664 | ||
2665 | assert_return(bus, -EINVAL); | |
2666 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2667 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2668 | ||
a3d59cd1 LP |
2669 | if (!BUS_IS_OPEN(bus->state)) |
2670 | return -ENOTCONN; | |
2671 | ||
4be39163 LP |
2672 | if (strv_isempty(interfaces)) |
2673 | return 0; | |
2674 | ||
2d5c8a27 DH |
2675 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2676 | if (r < 0) | |
2677 | return r; | |
2678 | if (r == 0) | |
2679 | return -ESRCH; | |
2680 | ||
68313d3d LP |
2681 | do { |
2682 | bus->nodes_modified = false; | |
1b02f301 | 2683 | m = sd_bus_message_unref(m); |
4be39163 | 2684 | |
2d5c8a27 | 2685 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded"); |
68313d3d LP |
2686 | if (r < 0) |
2687 | return r; | |
4be39163 | 2688 | |
68313d3d | 2689 | r = sd_bus_message_append_basic(m, 'o', path); |
4be39163 LP |
2690 | if (r < 0) |
2691 | return r; | |
2692 | ||
68313d3d | 2693 | r = sd_bus_message_open_container(m, 'a', "{sa{sv}}"); |
4be39163 LP |
2694 | if (r < 0) |
2695 | return r; | |
2696 | ||
68313d3d LP |
2697 | STRV_FOREACH(i, interfaces) { |
2698 | assert_return(interface_name_is_valid(*i), -EINVAL); | |
2699 | ||
2700 | r = sd_bus_message_open_container(m, 'e', "sa{sv}"); | |
2701 | if (r < 0) | |
2702 | return r; | |
2703 | ||
2704 | r = interfaces_added_append_one(bus, m, path, *i); | |
2705 | if (r < 0) | |
2706 | return r; | |
2707 | ||
2708 | if (bus->nodes_modified) | |
2709 | break; | |
2710 | ||
2711 | r = sd_bus_message_close_container(m); | |
2712 | if (r < 0) | |
2713 | return r; | |
2714 | } | |
2715 | ||
2716 | if (bus->nodes_modified) | |
2717 | continue; | |
2718 | ||
4be39163 LP |
2719 | r = sd_bus_message_close_container(m); |
2720 | if (r < 0) | |
2721 | return r; | |
4be39163 | 2722 | |
68313d3d | 2723 | } while (bus->nodes_modified); |
4be39163 LP |
2724 | |
2725 | return sd_bus_send(bus, m, NULL); | |
2726 | } | |
2727 | ||
d9f644e2 | 2728 | _public_ int sd_bus_emit_interfaces_added(sd_bus *bus, const char *path, const char *interface, ...) { |
250a918d | 2729 | char **interfaces; |
4be39163 LP |
2730 | |
2731 | assert_return(bus, -EINVAL); | |
2732 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2733 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2734 | ||
a3d59cd1 LP |
2735 | if (!BUS_IS_OPEN(bus->state)) |
2736 | return -ENOTCONN; | |
2737 | ||
250a918d | 2738 | interfaces = strv_from_stdarg_alloca(interface); |
4be39163 LP |
2739 | |
2740 | return sd_bus_emit_interfaces_added_strv(bus, path, interfaces); | |
2741 | } | |
2742 | ||
d9f644e2 | 2743 | _public_ int sd_bus_emit_interfaces_removed_strv(sd_bus *bus, const char *path, char **interfaces) { |
4afd3348 | 2744 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2745 | struct node *object_manager; |
4be39163 LP |
2746 | int r; |
2747 | ||
2748 | assert_return(bus, -EINVAL); | |
2749 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2750 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2751 | ||
a3d59cd1 LP |
2752 | if (!BUS_IS_OPEN(bus->state)) |
2753 | return -ENOTCONN; | |
2754 | ||
4be39163 LP |
2755 | if (strv_isempty(interfaces)) |
2756 | return 0; | |
2757 | ||
2d5c8a27 DH |
2758 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2759 | if (r < 0) | |
2760 | return r; | |
2761 | if (r == 0) | |
2762 | return -ESRCH; | |
2763 | ||
2764 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved"); | |
4be39163 LP |
2765 | if (r < 0) |
2766 | return r; | |
2767 | ||
2768 | r = sd_bus_message_append_basic(m, 'o', path); | |
2769 | if (r < 0) | |
2770 | return r; | |
2771 | ||
2772 | r = sd_bus_message_append_strv(m, interfaces); | |
2773 | if (r < 0) | |
2774 | return r; | |
2775 | ||
2776 | return sd_bus_send(bus, m, NULL); | |
2777 | } | |
2778 | ||
d9f644e2 | 2779 | _public_ int sd_bus_emit_interfaces_removed(sd_bus *bus, const char *path, const char *interface, ...) { |
250a918d | 2780 | char **interfaces; |
4be39163 LP |
2781 | |
2782 | assert_return(bus, -EINVAL); | |
2783 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2784 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2785 | ||
a3d59cd1 LP |
2786 | if (!BUS_IS_OPEN(bus->state)) |
2787 | return -ENOTCONN; | |
2788 | ||
250a918d | 2789 | interfaces = strv_from_stdarg_alloca(interface); |
4be39163 LP |
2790 | |
2791 | return sd_bus_emit_interfaces_removed_strv(bus, path, interfaces); | |
992c052c LP |
2792 | } |
2793 | ||
19befb2d LP |
2794 | _public_ int sd_bus_add_object_manager(sd_bus *bus, sd_bus_slot **slot, const char *path) { |
2795 | sd_bus_slot *s; | |
992c052c | 2796 | struct node *n; |
19befb2d | 2797 | int r; |
992c052c | 2798 | |
dfa92725 LP |
2799 | assert_return(bus, -EINVAL); |
2800 | assert_return(object_path_is_valid(path), -EINVAL); | |
2801 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c LP |
2802 | |
2803 | n = bus_node_allocate(bus, path); | |
2804 | if (!n) | |
2805 | return -ENOMEM; | |
2806 | ||
19befb2d LP |
2807 | s = bus_slot_allocate(bus, !slot, BUS_NODE_OBJECT_MANAGER, sizeof(struct node_object_manager), NULL); |
2808 | if (!s) { | |
2809 | r = -ENOMEM; | |
2810 | goto fail; | |
2811 | } | |
992c052c | 2812 | |
19befb2d LP |
2813 | s->node_object_manager.node = n; |
2814 | LIST_PREPEND(object_managers, n->object_managers, &s->node_object_manager); | |
2815 | bus->nodes_modified = true; | |
992c052c | 2816 | |
19befb2d LP |
2817 | if (slot) |
2818 | *slot = s; | |
992c052c | 2819 | |
19befb2d | 2820 | return 0; |
992c052c | 2821 | |
19befb2d LP |
2822 | fail: |
2823 | sd_bus_slot_unref(s); | |
992c052c | 2824 | bus_node_gc(bus, n); |
dfa92725 | 2825 | |
19befb2d | 2826 | return r; |
992c052c | 2827 | } |