]>
Commit | Line | Data |
---|---|---|
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; |
00590f82 | 41 | void *u, *found_u; |
992c052c LP |
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; |
00590f82 | 53 | r = c->find(bus, path, c->interface, u, &found_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 | 62 | return r; |
00590f82 AJ |
63 | } else |
64 | found_u = u; | |
992c052c LP |
65 | |
66 | if (userdata) | |
00590f82 | 67 | *userdata = found_u; |
992c052c LP |
68 | |
69 | return 1; | |
70 | } | |
71 | ||
09c8a7c6 | 72 | static void *vtable_method_convert_userdata(const sd_bus_vtable *p, void *u) { |
73 | assert(p); | |
74 | ||
75 | return (uint8_t*) u + p->x.method.offset; | |
76 | } | |
77 | ||
992c052c LP |
78 | static void *vtable_property_convert_userdata(const sd_bus_vtable *p, void *u) { |
79 | assert(p); | |
80 | ||
77a874a3 | 81 | return (uint8_t*) u + p->x.property.offset; |
992c052c LP |
82 | } |
83 | ||
84 | static int vtable_property_get_userdata( | |
85 | sd_bus *bus, | |
86 | const char *path, | |
87 | struct vtable_member *p, | |
f00c3121 LP |
88 | void **userdata, |
89 | sd_bus_error *error) { | |
992c052c LP |
90 | |
91 | void *u; | |
92 | int r; | |
93 | ||
94 | assert(bus); | |
95 | assert(path); | |
96 | assert(p); | |
97 | assert(userdata); | |
98 | ||
f00c3121 | 99 | r = node_vtable_get_userdata(bus, path, p->parent, &u, error); |
992c052c LP |
100 | if (r <= 0) |
101 | return r; | |
68313d3d LP |
102 | if (bus->nodes_modified) |
103 | return 0; | |
992c052c LP |
104 | |
105 | *userdata = vtable_property_convert_userdata(p->vtable, u); | |
106 | return 1; | |
107 | } | |
108 | ||
dfa92725 LP |
109 | static int add_enumerated_to_set( |
110 | sd_bus *bus, | |
111 | const char *prefix, | |
112 | struct node_enumerator *first, | |
f00c3121 LP |
113 | Set *s, |
114 | sd_bus_error *error) { | |
dfa92725 | 115 | |
992c052c LP |
116 | struct node_enumerator *c; |
117 | int r; | |
118 | ||
119 | assert(bus); | |
120 | assert(prefix); | |
121 | assert(s); | |
122 | ||
123 | LIST_FOREACH(enumerators, c, first) { | |
124 | char **children = NULL, **k; | |
1b64f838 | 125 | sd_bus_slot *slot; |
992c052c | 126 | |
68313d3d LP |
127 | if (bus->nodes_modified) |
128 | return 0; | |
129 | ||
1b64f838 LP |
130 | slot = container_of(c, sd_bus_slot, node_enumerator); |
131 | ||
132 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 | 133 | bus->current_userdata = slot->userdata; |
1b64f838 | 134 | r = c->callback(bus, prefix, slot->userdata, &children, error); |
caa82984 | 135 | bus->current_userdata = NULL; |
1b64f838 | 136 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 137 | |
992c052c LP |
138 | if (r < 0) |
139 | return r; | |
f00c3121 | 140 | if (sd_bus_error_is_set(error)) |
5958d089 | 141 | return -sd_bus_error_get_errno(error); |
992c052c LP |
142 | |
143 | STRV_FOREACH(k, children) { | |
144 | if (r < 0) { | |
145 | free(*k); | |
146 | continue; | |
147 | } | |
148 | ||
9ed794a3 | 149 | if (!object_path_is_valid(*k)) { |
992c052c LP |
150 | free(*k); |
151 | r = -EINVAL; | |
152 | continue; | |
153 | } | |
154 | ||
5d66866d LP |
155 | if (!object_path_startswith(*k, prefix)) { |
156 | free(*k); | |
157 | continue; | |
158 | } | |
159 | ||
992c052c | 160 | r = set_consume(s, *k); |
52c7f2b2 LP |
161 | if (r == -EEXIST) |
162 | r = 0; | |
992c052c LP |
163 | } |
164 | ||
165 | free(children); | |
166 | if (r < 0) | |
167 | return r; | |
168 | } | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
44eb1add DH |
173 | enum { |
174 | /* if set, add_subtree() works recursively */ | |
175 | CHILDREN_RECURSIVE = (1U << 1), | |
176 | /* if set, add_subtree() scans object-manager hierarchies recursively */ | |
177 | CHILDREN_SUBHIERARCHIES = (1U << 0), | |
178 | }; | |
179 | ||
dfa92725 LP |
180 | static int add_subtree_to_set( |
181 | sd_bus *bus, | |
182 | const char *prefix, | |
183 | struct node *n, | |
44eb1add | 184 | unsigned int flags, |
f00c3121 LP |
185 | Set *s, |
186 | sd_bus_error *error) { | |
dfa92725 | 187 | |
992c052c LP |
188 | struct node *i; |
189 | int r; | |
190 | ||
191 | assert(bus); | |
192 | assert(prefix); | |
193 | assert(n); | |
194 | assert(s); | |
195 | ||
f00c3121 | 196 | r = add_enumerated_to_set(bus, prefix, n->enumerators, s, error); |
992c052c LP |
197 | if (r < 0) |
198 | return r; | |
68313d3d LP |
199 | if (bus->nodes_modified) |
200 | return 0; | |
992c052c LP |
201 | |
202 | LIST_FOREACH(siblings, i, n->child) { | |
203 | char *t; | |
204 | ||
5d66866d LP |
205 | if (!object_path_startswith(i->path, prefix)) |
206 | continue; | |
207 | ||
992c052c LP |
208 | t = strdup(i->path); |
209 | if (!t) | |
210 | return -ENOMEM; | |
211 | ||
212 | r = set_consume(s, t); | |
213 | if (r < 0 && r != -EEXIST) | |
214 | return r; | |
215 | ||
44eb1add DH |
216 | if ((flags & CHILDREN_RECURSIVE) && |
217 | ((flags & CHILDREN_SUBHIERARCHIES) || !i->object_managers)) { | |
218 | r = add_subtree_to_set(bus, prefix, i, flags, s, error); | |
2d5c8a27 DH |
219 | if (r < 0) |
220 | return r; | |
221 | if (bus->nodes_modified) | |
222 | return 0; | |
223 | } | |
992c052c LP |
224 | } |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
dfa92725 LP |
229 | static int get_child_nodes( |
230 | sd_bus *bus, | |
231 | const char *prefix, | |
232 | struct node *n, | |
44eb1add | 233 | unsigned int flags, |
f00c3121 LP |
234 | Set **_s, |
235 | sd_bus_error *error) { | |
dfa92725 | 236 | |
992c052c LP |
237 | Set *s = NULL; |
238 | int r; | |
239 | ||
240 | assert(bus); | |
dfa92725 | 241 | assert(prefix); |
992c052c LP |
242 | assert(n); |
243 | assert(_s); | |
244 | ||
d5099efc | 245 | s = set_new(&string_hash_ops); |
992c052c LP |
246 | if (!s) |
247 | return -ENOMEM; | |
248 | ||
44eb1add | 249 | r = add_subtree_to_set(bus, prefix, n, flags, s, error); |
992c052c LP |
250 | if (r < 0) { |
251 | set_free_free(s); | |
252 | return r; | |
253 | } | |
254 | ||
255 | *_s = s; | |
256 | return 0; | |
257 | } | |
258 | ||
259 | static int node_callbacks_run( | |
260 | sd_bus *bus, | |
261 | sd_bus_message *m, | |
262 | struct node_callback *first, | |
263 | bool require_fallback, | |
264 | bool *found_object) { | |
265 | ||
266 | struct node_callback *c; | |
267 | int r; | |
268 | ||
269 | assert(bus); | |
270 | assert(m); | |
271 | assert(found_object); | |
272 | ||
273 | LIST_FOREACH(callbacks, c, first) { | |
4afd3348 | 274 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
1b64f838 | 275 | sd_bus_slot *slot; |
ebcf1f97 | 276 | |
68313d3d LP |
277 | if (bus->nodes_modified) |
278 | return 0; | |
279 | ||
992c052c LP |
280 | if (require_fallback && !c->is_fallback) |
281 | continue; | |
282 | ||
283 | *found_object = true; | |
284 | ||
285 | if (c->last_iteration == bus->iteration_counter) | |
286 | continue; | |
287 | ||
68313d3d LP |
288 | c->last_iteration = bus->iteration_counter; |
289 | ||
992c052c LP |
290 | r = sd_bus_message_rewind(m, true); |
291 | if (r < 0) | |
292 | return r; | |
293 | ||
1b64f838 LP |
294 | slot = container_of(c, sd_bus_slot, node_callback); |
295 | ||
296 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
297 | bus->current_handler = c->callback; |
298 | bus->current_userdata = slot->userdata; | |
19070062 | 299 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
300 | bus->current_userdata = NULL; |
301 | bus->current_handler = NULL; | |
1b64f838 | 302 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 303 | |
ebcf1f97 | 304 | r = bus_maybe_reply_error(m, r, &error_buffer); |
992c052c LP |
305 | if (r != 0) |
306 | return r; | |
307 | } | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
adacb957 LP |
312 | #define CAPABILITY_SHIFT(x) (((x) >> __builtin_ctzll(_SD_BUS_VTABLE_CAPABILITY_MASK)) & 0xFFFF) |
313 | ||
314 | static int check_access(sd_bus *bus, sd_bus_message *m, struct vtable_member *c, sd_bus_error *error) { | |
adacb957 | 315 | uint64_t cap; |
adacb957 LP |
316 | int r; |
317 | ||
318 | assert(bus); | |
319 | assert(m); | |
320 | assert(c); | |
321 | ||
322 | /* If the entire bus is trusted let's grant access */ | |
323 | if (bus->trusted) | |
324 | return 0; | |
325 | ||
326 | /* If the member is marked UNPRIVILEGED let's grant access */ | |
327 | if (c->vtable->flags & SD_BUS_VTABLE_UNPRIVILEGED) | |
328 | return 0; | |
329 | ||
adacb957 LP |
330 | /* Check have the caller has the requested capability |
331 | * set. Note that the flags value contains the capability | |
332 | * number plus one, which we need to subtract here. We do this | |
333 | * so that we have 0 as special value for "default | |
334 | * capability". */ | |
335 | cap = CAPABILITY_SHIFT(c->vtable->flags); | |
336 | if (cap == 0) | |
337 | cap = CAPABILITY_SHIFT(c->parent->vtable[0].flags); | |
338 | if (cap == 0) | |
339 | cap = CAP_SYS_ADMIN; | |
340 | else | |
313cefa1 | 341 | cap--; |
adacb957 | 342 | |
def9a7aa LP |
343 | r = sd_bus_query_sender_privilege(m, cap); |
344 | if (r < 0) | |
345 | return r; | |
adacb957 | 346 | if (r > 0) |
def9a7aa | 347 | return 0; |
adacb957 LP |
348 | |
349 | return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Access to %s.%s() not permitted.", c->interface, c->member); | |
350 | } | |
351 | ||
992c052c LP |
352 | static int method_callbacks_run( |
353 | sd_bus *bus, | |
354 | sd_bus_message *m, | |
355 | struct vtable_member *c, | |
356 | bool require_fallback, | |
357 | bool *found_object) { | |
358 | ||
4afd3348 | 359 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
360 | const char *signature; |
361 | void *u; | |
362 | int r; | |
363 | ||
364 | assert(bus); | |
365 | assert(m); | |
366 | assert(c); | |
367 | assert(found_object); | |
368 | ||
369 | if (require_fallback && !c->parent->is_fallback) | |
370 | return 0; | |
371 | ||
adacb957 LP |
372 | r = check_access(bus, m, c, &error); |
373 | if (r < 0) | |
374 | return bus_maybe_reply_error(m, r, &error); | |
375 | ||
f00c3121 | 376 | r = node_vtable_get_userdata(bus, m->path, c->parent, &u, &error); |
992c052c | 377 | if (r <= 0) |
f00c3121 | 378 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
379 | if (bus->nodes_modified) |
380 | return 0; | |
992c052c | 381 | |
09c8a7c6 | 382 | u = vtable_method_convert_userdata(c->vtable, u); |
383 | ||
992c052c LP |
384 | *found_object = true; |
385 | ||
68313d3d LP |
386 | if (c->last_iteration == bus->iteration_counter) |
387 | return 0; | |
388 | ||
389 | c->last_iteration = bus->iteration_counter; | |
390 | ||
992c052c LP |
391 | r = sd_bus_message_rewind(m, true); |
392 | if (r < 0) | |
393 | return r; | |
394 | ||
40ca29a1 LP |
395 | signature = sd_bus_message_get_signature(m, true); |
396 | if (!signature) | |
397 | return -EINVAL; | |
992c052c | 398 | |
f00c3121 | 399 | if (!streq(strempty(c->vtable->x.method.signature), signature)) |
86b8d289 LP |
400 | return sd_bus_reply_method_errorf( |
401 | m, | |
402 | SD_BUS_ERROR_INVALID_ARGS, | |
403 | "Invalid arguments '%s' to call %s.%s(), expecting '%s'.", | |
404 | signature, c->interface, c->member, strempty(c->vtable->x.method.signature)); | |
992c052c | 405 | |
6717d473 LP |
406 | /* Keep track what the signature of the reply to this message |
407 | * should be, so that this can be enforced when sealing the | |
408 | * reply. */ | |
409 | m->enforced_reply_signature = strempty(c->vtable->x.method.result); | |
410 | ||
ebcf1f97 | 411 | if (c->vtable->x.method.handler) { |
1b64f838 LP |
412 | sd_bus_slot *slot; |
413 | ||
414 | slot = container_of(c->parent, sd_bus_slot, node_vtable); | |
19befb2d | 415 | |
1b64f838 | 416 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
417 | bus->current_handler = c->vtable->x.method.handler; |
418 | bus->current_userdata = u; | |
19070062 | 419 | r = c->vtable->x.method.handler(m, u, &error); |
caa82984 LP |
420 | bus->current_userdata = NULL; |
421 | bus->current_handler = NULL; | |
1b64f838 | 422 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 423 | |
f00c3121 | 424 | return bus_maybe_reply_error(m, r, &error); |
ebcf1f97 | 425 | } |
992c052c LP |
426 | |
427 | /* If the method callback is NULL, make this a successful NOP */ | |
df2d202e | 428 | r = sd_bus_reply_method_return(m, NULL); |
992c052c LP |
429 | if (r < 0) |
430 | return r; | |
431 | ||
432 | return 1; | |
433 | } | |
434 | ||
435 | static int invoke_property_get( | |
436 | sd_bus *bus, | |
19befb2d | 437 | sd_bus_slot *slot, |
992c052c LP |
438 | const sd_bus_vtable *v, |
439 | const char *path, | |
440 | const char *interface, | |
441 | const char *property, | |
ebcf1f97 LP |
442 | sd_bus_message *reply, |
443 | void *userdata, | |
444 | sd_bus_error *error) { | |
992c052c | 445 | |
af8601fa | 446 | const void *p; |
f00c3121 | 447 | int r; |
992c052c LP |
448 | |
449 | assert(bus); | |
19befb2d | 450 | assert(slot); |
992c052c | 451 | assert(v); |
dfa92725 LP |
452 | assert(path); |
453 | assert(interface); | |
454 | assert(property); | |
ebcf1f97 | 455 | assert(reply); |
992c052c | 456 | |
f00c3121 | 457 | if (v->x.property.get) { |
19befb2d | 458 | |
1b64f838 | 459 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 | 460 | bus->current_userdata = userdata; |
f00c3121 | 461 | r = v->x.property.get(bus, path, interface, property, reply, userdata, error); |
caa82984 | 462 | bus->current_userdata = NULL; |
1b64f838 | 463 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 464 | |
f00c3121 LP |
465 | if (r < 0) |
466 | return r; | |
467 | if (sd_bus_error_is_set(error)) | |
5958d089 | 468 | return -sd_bus_error_get_errno(error); |
f00c3121 LP |
469 | return r; |
470 | } | |
992c052c LP |
471 | |
472 | /* Automatic handling if no callback is defined. */ | |
473 | ||
c13c7de3 | 474 | if (streq(v->x.property.signature, "as")) |
ebcf1f97 | 475 | return sd_bus_message_append_strv(reply, *(char***) userdata); |
c13c7de3 | 476 | |
77a874a3 LP |
477 | assert(signature_is_single(v->x.property.signature, false)); |
478 | assert(bus_type_is_basic(v->x.property.signature[0])); | |
992c052c | 479 | |
77a874a3 | 480 | switch (v->x.property.signature[0]) { |
992c052c LP |
481 | |
482 | case SD_BUS_TYPE_STRING: | |
28d6633a LP |
483 | case SD_BUS_TYPE_SIGNATURE: |
484 | p = strempty(*(char**) userdata); | |
af8601fa KS |
485 | break; |
486 | ||
992c052c | 487 | case SD_BUS_TYPE_OBJECT_PATH: |
992c052c | 488 | p = *(char**) userdata; |
28d6633a | 489 | assert(p); |
992c052c LP |
490 | break; |
491 | ||
492 | default: | |
493 | p = userdata; | |
494 | break; | |
495 | } | |
496 | ||
ebcf1f97 | 497 | return sd_bus_message_append_basic(reply, v->x.property.signature[0], p); |
992c052c LP |
498 | } |
499 | ||
500 | static int invoke_property_set( | |
501 | sd_bus *bus, | |
19befb2d | 502 | sd_bus_slot *slot, |
992c052c LP |
503 | const sd_bus_vtable *v, |
504 | const char *path, | |
505 | const char *interface, | |
506 | const char *property, | |
507 | sd_bus_message *value, | |
ebcf1f97 LP |
508 | void *userdata, |
509 | sd_bus_error *error) { | |
992c052c LP |
510 | |
511 | int r; | |
512 | ||
513 | assert(bus); | |
19befb2d | 514 | assert(slot); |
992c052c | 515 | assert(v); |
dfa92725 LP |
516 | assert(path); |
517 | assert(interface); | |
518 | assert(property); | |
519 | assert(value); | |
992c052c | 520 | |
f00c3121 | 521 | if (v->x.property.set) { |
19befb2d | 522 | |
1b64f838 | 523 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 | 524 | bus->current_userdata = userdata; |
f00c3121 | 525 | r = v->x.property.set(bus, path, interface, property, value, userdata, error); |
caa82984 | 526 | bus->current_userdata = NULL; |
1b64f838 | 527 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 528 | |
f00c3121 LP |
529 | if (r < 0) |
530 | return r; | |
531 | if (sd_bus_error_is_set(error)) | |
5958d089 | 532 | return -sd_bus_error_get_errno(error); |
f00c3121 LP |
533 | return r; |
534 | } | |
992c052c LP |
535 | |
536 | /* Automatic handling if no callback is defined. */ | |
537 | ||
77a874a3 LP |
538 | assert(signature_is_single(v->x.property.signature, false)); |
539 | assert(bus_type_is_basic(v->x.property.signature[0])); | |
992c052c | 540 | |
77a874a3 | 541 | switch (v->x.property.signature[0]) { |
992c052c LP |
542 | |
543 | case SD_BUS_TYPE_STRING: | |
544 | case SD_BUS_TYPE_OBJECT_PATH: | |
545 | case SD_BUS_TYPE_SIGNATURE: { | |
546 | const char *p; | |
547 | char *n; | |
548 | ||
77a874a3 | 549 | r = sd_bus_message_read_basic(value, v->x.property.signature[0], &p); |
992c052c LP |
550 | if (r < 0) |
551 | return r; | |
552 | ||
553 | n = strdup(p); | |
554 | if (!n) | |
555 | return -ENOMEM; | |
556 | ||
557 | free(*(char**) userdata); | |
558 | *(char**) userdata = n; | |
559 | ||
560 | break; | |
561 | } | |
562 | ||
563 | default: | |
77a874a3 | 564 | r = sd_bus_message_read_basic(value, v->x.property.signature[0], userdata); |
992c052c LP |
565 | if (r < 0) |
566 | return r; | |
567 | ||
568 | break; | |
569 | } | |
570 | ||
571 | return 1; | |
572 | } | |
573 | ||
574 | static int property_get_set_callbacks_run( | |
575 | sd_bus *bus, | |
576 | sd_bus_message *m, | |
577 | struct vtable_member *c, | |
578 | bool require_fallback, | |
579 | bool is_get, | |
580 | bool *found_object) { | |
581 | ||
4afd3348 LP |
582 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
583 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
19befb2d | 584 | sd_bus_slot *slot; |
c94d7fc3 | 585 | void *u = NULL; |
992c052c LP |
586 | int r; |
587 | ||
588 | assert(bus); | |
589 | assert(m); | |
dfa92725 | 590 | assert(c); |
992c052c LP |
591 | assert(found_object); |
592 | ||
593 | if (require_fallback && !c->parent->is_fallback) | |
594 | return 0; | |
595 | ||
f00c3121 | 596 | r = vtable_property_get_userdata(bus, m->path, c, &u, &error); |
992c052c | 597 | if (r <= 0) |
f00c3121 | 598 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
599 | if (bus->nodes_modified) |
600 | return 0; | |
992c052c | 601 | |
19befb2d LP |
602 | slot = container_of(c->parent, sd_bus_slot, node_vtable); |
603 | ||
992c052c LP |
604 | *found_object = true; |
605 | ||
df2d202e | 606 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
607 | if (r < 0) |
608 | return r; | |
609 | ||
992c052c | 610 | if (is_get) { |
68313d3d LP |
611 | /* Note that we do not protect against reexecution |
612 | * here (using the last_iteration check, see below), | |
613 | * should the node tree have changed and we got called | |
614 | * again. We assume that property Get() calls are | |
615 | * ultimately without side-effects or if they aren't | |
616 | * then at least idempotent. */ | |
617 | ||
77a874a3 | 618 | r = sd_bus_message_open_container(reply, 'v', c->vtable->x.property.signature); |
992c052c LP |
619 | if (r < 0) |
620 | return r; | |
621 | ||
adacb957 LP |
622 | /* Note that we do not do an access check here. Read |
623 | * access to properties is always unrestricted, since | |
624 | * PropertiesChanged signals broadcast contents | |
625 | * anyway. */ | |
626 | ||
19befb2d | 627 | r = invoke_property_get(bus, slot, c->vtable, m->path, c->interface, c->member, reply, u, &error); |
992c052c | 628 | if (r < 0) |
f00c3121 | 629 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 630 | |
68313d3d LP |
631 | if (bus->nodes_modified) |
632 | return 0; | |
633 | ||
992c052c LP |
634 | r = sd_bus_message_close_container(reply); |
635 | if (r < 0) | |
636 | return r; | |
637 | ||
638 | } else { | |
0ca454d4 LP |
639 | const char *signature = NULL; |
640 | char type = 0; | |
641 | ||
992c052c | 642 | if (c->vtable->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) |
ebcf1f97 | 643 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_PROPERTY_READ_ONLY, "Property '%s' is not writable.", c->member); |
68313d3d | 644 | |
ebcf1f97 LP |
645 | /* Avoid that we call the set routine more than once |
646 | * if the processing of this message got restarted | |
647 | * because the node tree changed. */ | |
648 | if (c->last_iteration == bus->iteration_counter) | |
649 | return 0; | |
992c052c | 650 | |
ebcf1f97 | 651 | c->last_iteration = bus->iteration_counter; |
992c052c | 652 | |
0ca454d4 LP |
653 | r = sd_bus_message_peek_type(m, &type, &signature); |
654 | if (r < 0) | |
655 | return r; | |
656 | ||
657 | if (type != 'v' || !streq(strempty(signature), strempty(c->vtable->x.property.signature))) | |
658 | 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)); | |
659 | ||
ebcf1f97 LP |
660 | r = sd_bus_message_enter_container(m, 'v', c->vtable->x.property.signature); |
661 | if (r < 0) | |
662 | return r; | |
992c052c | 663 | |
adacb957 LP |
664 | r = check_access(bus, m, c, &error); |
665 | if (r < 0) | |
666 | return bus_maybe_reply_error(m, r, &error); | |
667 | ||
19befb2d | 668 | r = invoke_property_set(bus, slot, c->vtable, m->path, c->interface, c->member, m, u, &error); |
ebcf1f97 | 669 | if (r < 0) |
f00c3121 | 670 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 671 | |
68313d3d LP |
672 | if (bus->nodes_modified) |
673 | return 0; | |
674 | ||
992c052c LP |
675 | r = sd_bus_message_exit_container(m); |
676 | if (r < 0) | |
677 | return r; | |
678 | } | |
679 | ||
680 | r = sd_bus_send(bus, reply, NULL); | |
681 | if (r < 0) | |
682 | return r; | |
683 | ||
684 | return 1; | |
685 | } | |
686 | ||
a03e4337 LP |
687 | static int vtable_append_one_property( |
688 | sd_bus *bus, | |
689 | sd_bus_message *reply, | |
690 | const char *path, | |
691 | struct node_vtable *c, | |
692 | const sd_bus_vtable *v, | |
693 | void *userdata, | |
694 | sd_bus_error *error) { | |
695 | ||
19befb2d | 696 | sd_bus_slot *slot; |
a03e4337 LP |
697 | int r; |
698 | ||
699 | assert(bus); | |
700 | assert(reply); | |
701 | assert(path); | |
702 | assert(c); | |
703 | assert(v); | |
704 | ||
705 | r = sd_bus_message_open_container(reply, 'e', "sv"); | |
706 | if (r < 0) | |
707 | return r; | |
708 | ||
709 | r = sd_bus_message_append(reply, "s", v->x.property.member); | |
710 | if (r < 0) | |
711 | return r; | |
712 | ||
713 | r = sd_bus_message_open_container(reply, 'v', v->x.property.signature); | |
714 | if (r < 0) | |
715 | return r; | |
716 | ||
19befb2d LP |
717 | slot = container_of(c, sd_bus_slot, node_vtable); |
718 | ||
719 | r = invoke_property_get(bus, slot, v, path, c->interface, v->x.property.member, reply, vtable_property_convert_userdata(v, userdata), error); | |
a03e4337 LP |
720 | if (r < 0) |
721 | return r; | |
722 | if (bus->nodes_modified) | |
723 | return 0; | |
724 | ||
725 | r = sd_bus_message_close_container(reply); | |
726 | if (r < 0) | |
727 | return r; | |
728 | ||
729 | r = sd_bus_message_close_container(reply); | |
730 | if (r < 0) | |
731 | return r; | |
732 | ||
733 | return 0; | |
734 | } | |
735 | ||
992c052c LP |
736 | static int vtable_append_all_properties( |
737 | sd_bus *bus, | |
738 | sd_bus_message *reply, | |
739 | const char *path, | |
740 | struct node_vtable *c, | |
741 | void *userdata, | |
742 | sd_bus_error *error) { | |
743 | ||
744 | const sd_bus_vtable *v; | |
745 | int r; | |
746 | ||
747 | assert(bus); | |
748 | assert(reply); | |
dfa92725 | 749 | assert(path); |
992c052c LP |
750 | assert(c); |
751 | ||
6e8df5f0 LP |
752 | if (c->vtable[0].flags & SD_BUS_VTABLE_HIDDEN) |
753 | return 1; | |
754 | ||
992c052c LP |
755 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
756 | if (v->type != _SD_BUS_VTABLE_PROPERTY && v->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) | |
757 | continue; | |
758 | ||
6e8df5f0 LP |
759 | if (v->flags & SD_BUS_VTABLE_HIDDEN) |
760 | continue; | |
761 | ||
33702051 LP |
762 | if (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT) |
763 | continue; | |
764 | ||
a03e4337 | 765 | r = vtable_append_one_property(bus, reply, path, c, v, userdata, error); |
f00c3121 LP |
766 | if (r < 0) |
767 | return r; | |
68313d3d LP |
768 | if (bus->nodes_modified) |
769 | return 0; | |
992c052c LP |
770 | } |
771 | ||
772 | return 1; | |
773 | } | |
774 | ||
775 | static int property_get_all_callbacks_run( | |
776 | sd_bus *bus, | |
777 | sd_bus_message *m, | |
778 | struct node_vtable *first, | |
779 | bool require_fallback, | |
780 | const char *iface, | |
781 | bool *found_object) { | |
782 | ||
4afd3348 | 783 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
992c052c | 784 | struct node_vtable *c; |
bd037038 | 785 | bool found_interface; |
992c052c LP |
786 | int r; |
787 | ||
788 | assert(bus); | |
789 | assert(m); | |
790 | assert(found_object); | |
791 | ||
df2d202e | 792 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
793 | if (r < 0) |
794 | return r; | |
795 | ||
796 | r = sd_bus_message_open_container(reply, 'a', "{sv}"); | |
797 | if (r < 0) | |
798 | return r; | |
799 | ||
38911893 | 800 | found_interface = !iface || |
bd037038 LP |
801 | streq(iface, "org.freedesktop.DBus.Properties") || |
802 | streq(iface, "org.freedesktop.DBus.Peer") || | |
803 | streq(iface, "org.freedesktop.DBus.Introspectable"); | |
804 | ||
992c052c | 805 | LIST_FOREACH(vtables, c, first) { |
4afd3348 | 806 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
807 | void *u; |
808 | ||
809 | if (require_fallback && !c->is_fallback) | |
810 | continue; | |
811 | ||
f00c3121 | 812 | r = node_vtable_get_userdata(bus, m->path, c, &u, &error); |
992c052c | 813 | if (r < 0) |
f00c3121 | 814 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
815 | if (bus->nodes_modified) |
816 | return 0; | |
992c052c LP |
817 | if (r == 0) |
818 | continue; | |
819 | ||
820 | *found_object = true; | |
821 | ||
822 | if (iface && !streq(c->interface, iface)) | |
823 | continue; | |
824 | found_interface = true; | |
825 | ||
992c052c LP |
826 | r = vtable_append_all_properties(bus, reply, m->path, c, u, &error); |
827 | if (r < 0) | |
f00c3121 | 828 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
829 | if (bus->nodes_modified) |
830 | return 0; | |
992c052c LP |
831 | } |
832 | ||
733e792b AJ |
833 | if (!*found_object) |
834 | return 0; | |
835 | ||
992c052c LP |
836 | if (!found_interface) { |
837 | r = sd_bus_reply_method_errorf( | |
df2d202e | 838 | m, |
40ca29a1 | 839 | SD_BUS_ERROR_UNKNOWN_INTERFACE, |
992c052c LP |
840 | "Unknown interface '%s'.", iface); |
841 | if (r < 0) | |
842 | return r; | |
843 | ||
844 | return 1; | |
845 | } | |
846 | ||
847 | r = sd_bus_message_close_container(reply); | |
848 | if (r < 0) | |
849 | return r; | |
850 | ||
851 | r = sd_bus_send(bus, reply, NULL); | |
852 | if (r < 0) | |
853 | return r; | |
854 | ||
855 | return 1; | |
856 | } | |
857 | ||
ff02f101 | 858 | static int bus_node_exists( |
dfa92725 LP |
859 | sd_bus *bus, |
860 | struct node *n, | |
861 | const char *path, | |
862 | bool require_fallback) { | |
863 | ||
992c052c LP |
864 | struct node_vtable *c; |
865 | struct node_callback *k; | |
ff02f101 | 866 | int r; |
992c052c LP |
867 | |
868 | assert(bus); | |
869 | assert(n); | |
dfa92725 | 870 | assert(path); |
992c052c LP |
871 | |
872 | /* Tests if there's anything attached directly to this node | |
873 | * for the specified path */ | |
874 | ||
ff02f101 DH |
875 | if (!require_fallback && (n->enumerators || n->object_managers)) |
876 | return true; | |
877 | ||
992c052c LP |
878 | LIST_FOREACH(callbacks, k, n->callbacks) { |
879 | if (require_fallback && !k->is_fallback) | |
880 | continue; | |
881 | ||
ff02f101 | 882 | return 1; |
992c052c LP |
883 | } |
884 | ||
885 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 886 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
887 | |
888 | if (require_fallback && !c->is_fallback) | |
889 | continue; | |
890 | ||
ff02f101 DH |
891 | r = node_vtable_get_userdata(bus, path, c, NULL, &error); |
892 | if (r != 0) | |
893 | return r; | |
68313d3d | 894 | if (bus->nodes_modified) |
ff02f101 | 895 | return 0; |
992c052c LP |
896 | } |
897 | ||
ff02f101 | 898 | return 0; |
992c052c LP |
899 | } |
900 | ||
901 | static int process_introspect( | |
902 | sd_bus *bus, | |
903 | sd_bus_message *m, | |
904 | struct node *n, | |
905 | bool require_fallback, | |
906 | bool *found_object) { | |
907 | ||
4afd3348 LP |
908 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
909 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
992c052c | 910 | _cleanup_set_free_free_ Set *s = NULL; |
718db961 | 911 | const char *previous_interface = NULL; |
992c052c LP |
912 | struct introspect intro; |
913 | struct node_vtable *c; | |
914 | bool empty; | |
915 | int r; | |
916 | ||
917 | assert(bus); | |
918 | assert(m); | |
919 | assert(n); | |
920 | assert(found_object); | |
921 | ||
44eb1add | 922 | r = get_child_nodes(bus, m->path, n, 0, &s, &error); |
992c052c | 923 | if (r < 0) |
f00c3121 | 924 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
925 | if (bus->nodes_modified) |
926 | return 0; | |
992c052c | 927 | |
7fb411f0 | 928 | r = introspect_begin(&intro, bus->trusted); |
992c052c LP |
929 | if (r < 0) |
930 | return r; | |
931 | ||
943c3f94 | 932 | r = introspect_write_default_interfaces(&intro, !require_fallback && n->object_managers); |
992c052c LP |
933 | if (r < 0) |
934 | return r; | |
935 | ||
936 | empty = set_isempty(s); | |
937 | ||
938 | LIST_FOREACH(vtables, c, n->vtables) { | |
939 | if (require_fallback && !c->is_fallback) | |
940 | continue; | |
941 | ||
f00c3121 LP |
942 | r = node_vtable_get_userdata(bus, m->path, c, NULL, &error); |
943 | if (r < 0) { | |
944 | r = bus_maybe_reply_error(m, r, &error); | |
945 | goto finish; | |
946 | } | |
947 | if (bus->nodes_modified) { | |
948 | r = 0; | |
949 | goto finish; | |
950 | } | |
992c052c LP |
951 | if (r == 0) |
952 | continue; | |
953 | ||
954 | empty = false; | |
955 | ||
6e8df5f0 LP |
956 | if (c->vtable[0].flags & SD_BUS_VTABLE_HIDDEN) |
957 | continue; | |
958 | ||
718db961 LP |
959 | if (!streq_ptr(previous_interface, c->interface)) { |
960 | ||
961 | if (previous_interface) | |
4b61c875 | 962 | fputs_unlocked(" </interface>\n", intro.f); |
718db961 LP |
963 | |
964 | fprintf(intro.f, " <interface name=\"%s\">\n", c->interface); | |
965 | } | |
966 | ||
967 | r = introspect_write_interface(&intro, c->vtable); | |
992c052c LP |
968 | if (r < 0) |
969 | goto finish; | |
718db961 LP |
970 | |
971 | previous_interface = c->interface; | |
992c052c LP |
972 | } |
973 | ||
718db961 | 974 | if (previous_interface) |
4b61c875 | 975 | fputs_unlocked(" </interface>\n", intro.f); |
718db961 | 976 | |
992c052c LP |
977 | if (empty) { |
978 | /* Nothing?, let's see if we exist at all, and if not | |
979 | * refuse to do anything */ | |
980 | r = bus_node_exists(bus, n, m->path, require_fallback); | |
f2bfc6ba LP |
981 | if (r <= 0) { |
982 | r = bus_maybe_reply_error(m, r, &error); | |
ff02f101 | 983 | goto finish; |
f2bfc6ba | 984 | } |
ff02f101 DH |
985 | if (bus->nodes_modified) { |
986 | r = 0; | |
992c052c | 987 | goto finish; |
ff02f101 | 988 | } |
992c052c LP |
989 | } |
990 | ||
991 | *found_object = true; | |
992 | ||
993 | r = introspect_write_child_nodes(&intro, s, m->path); | |
994 | if (r < 0) | |
995 | goto finish; | |
996 | ||
997 | r = introspect_finish(&intro, bus, m, &reply); | |
998 | if (r < 0) | |
999 | goto finish; | |
1000 | ||
1001 | r = sd_bus_send(bus, reply, NULL); | |
1002 | if (r < 0) | |
1003 | goto finish; | |
1004 | ||
1005 | r = 1; | |
1006 | ||
1007 | finish: | |
1008 | introspect_free(&intro); | |
1009 | return r; | |
1010 | } | |
1011 | ||
992c052c LP |
1012 | static int object_manager_serialize_path( |
1013 | sd_bus *bus, | |
1014 | sd_bus_message *reply, | |
1015 | const char *prefix, | |
1016 | const char *path, | |
1017 | bool require_fallback, | |
1018 | sd_bus_error *error) { | |
1019 | ||
718db961 LP |
1020 | const char *previous_interface = NULL; |
1021 | bool found_something = false; | |
992c052c LP |
1022 | struct node_vtable *i; |
1023 | struct node *n; | |
1024 | int r; | |
1025 | ||
1026 | assert(bus); | |
1027 | assert(reply); | |
1028 | assert(prefix); | |
1029 | assert(path); | |
1030 | assert(error); | |
1031 | ||
1032 | n = hashmap_get(bus->nodes, prefix); | |
1033 | if (!n) | |
1034 | return 0; | |
1035 | ||
992c052c | 1036 | LIST_FOREACH(vtables, i, n->vtables) { |
92db139e | 1037 | void *u; |
992c052c LP |
1038 | |
1039 | if (require_fallback && !i->is_fallback) | |
1040 | continue; | |
1041 | ||
f00c3121 | 1042 | r = node_vtable_get_userdata(bus, path, i, &u, error); |
92db139e LP |
1043 | if (r < 0) |
1044 | return r; | |
68313d3d LP |
1045 | if (bus->nodes_modified) |
1046 | return 0; | |
92db139e LP |
1047 | if (r == 0) |
1048 | continue; | |
1049 | ||
1050 | if (!found_something) { | |
718db961 LP |
1051 | |
1052 | /* Open the object part */ | |
1053 | ||
92db139e LP |
1054 | r = sd_bus_message_open_container(reply, 'e', "oa{sa{sv}}"); |
1055 | if (r < 0) | |
1056 | return r; | |
1057 | ||
1058 | r = sd_bus_message_append(reply, "o", path); | |
1059 | if (r < 0) | |
1060 | return r; | |
1061 | ||
1062 | r = sd_bus_message_open_container(reply, 'a', "{sa{sv}}"); | |
1063 | if (r < 0) | |
1064 | return r; | |
1065 | ||
c0e7906d DH |
1066 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Peer", 0); |
1067 | if (r < 0) | |
1068 | return r; | |
1069 | ||
1070 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Introspectable", 0); | |
1071 | if (r < 0) | |
1072 | return r; | |
1073 | ||
1074 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Properties", 0); | |
1075 | if (r < 0) | |
1076 | return r; | |
1077 | ||
1078 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.ObjectManager", 0); | |
1079 | if (r < 0) | |
1080 | return r; | |
1081 | ||
92db139e LP |
1082 | found_something = true; |
1083 | } | |
1084 | ||
718db961 LP |
1085 | if (!streq_ptr(previous_interface, i->interface)) { |
1086 | ||
1087 | /* Maybe close the previous interface part */ | |
1088 | ||
1089 | if (previous_interface) { | |
1090 | r = sd_bus_message_close_container(reply); | |
1091 | if (r < 0) | |
1092 | return r; | |
1093 | ||
1094 | r = sd_bus_message_close_container(reply); | |
1095 | if (r < 0) | |
1096 | return r; | |
1097 | } | |
1098 | ||
1099 | /* Open the new interface part */ | |
1100 | ||
1101 | r = sd_bus_message_open_container(reply, 'e', "sa{sv}"); | |
1102 | if (r < 0) | |
1103 | return r; | |
1104 | ||
1105 | r = sd_bus_message_append(reply, "s", i->interface); | |
1106 | if (r < 0) | |
1107 | return r; | |
1108 | ||
1109 | r = sd_bus_message_open_container(reply, 'a', "{sv}"); | |
1110 | if (r < 0) | |
1111 | return r; | |
1112 | } | |
1113 | ||
1114 | r = vtable_append_all_properties(bus, reply, path, i, u, error); | |
992c052c LP |
1115 | if (r < 0) |
1116 | return r; | |
68313d3d LP |
1117 | if (bus->nodes_modified) |
1118 | return 0; | |
718db961 LP |
1119 | |
1120 | previous_interface = i->interface; | |
1121 | } | |
1122 | ||
1123 | if (previous_interface) { | |
1124 | r = sd_bus_message_close_container(reply); | |
1125 | if (r < 0) | |
1126 | return r; | |
1127 | ||
1128 | r = sd_bus_message_close_container(reply); | |
1129 | if (r < 0) | |
1130 | return r; | |
992c052c LP |
1131 | } |
1132 | ||
92db139e LP |
1133 | if (found_something) { |
1134 | r = sd_bus_message_close_container(reply); | |
1135 | if (r < 0) | |
1136 | return r; | |
992c052c | 1137 | |
92db139e LP |
1138 | r = sd_bus_message_close_container(reply); |
1139 | if (r < 0) | |
1140 | return r; | |
1141 | } | |
992c052c LP |
1142 | |
1143 | return 1; | |
1144 | } | |
1145 | ||
1146 | static int object_manager_serialize_path_and_fallbacks( | |
1147 | sd_bus *bus, | |
1148 | sd_bus_message *reply, | |
1149 | const char *path, | |
1150 | sd_bus_error *error) { | |
1151 | ||
92e189e5 | 1152 | char *prefix; |
992c052c LP |
1153 | int r; |
1154 | ||
1155 | assert(bus); | |
1156 | assert(reply); | |
1157 | assert(path); | |
1158 | assert(error); | |
1159 | ||
1160 | /* First, add all vtables registered for this path */ | |
1161 | r = object_manager_serialize_path(bus, reply, path, path, false, error); | |
1162 | if (r < 0) | |
1163 | return r; | |
68313d3d LP |
1164 | if (bus->nodes_modified) |
1165 | return 0; | |
992c052c LP |
1166 | |
1167 | /* Second, add fallback vtables registered for any of the prefixes */ | |
92e189e5 LP |
1168 | prefix = alloca(strlen(path) + 1); |
1169 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
1170 | r = object_manager_serialize_path(bus, reply, prefix, path, true, error); | |
1171 | if (r < 0) | |
1172 | return r; | |
68313d3d LP |
1173 | if (bus->nodes_modified) |
1174 | return 0; | |
992c052c LP |
1175 | } |
1176 | ||
1177 | return 0; | |
1178 | } | |
1179 | ||
1180 | static int process_get_managed_objects( | |
1181 | sd_bus *bus, | |
1182 | sd_bus_message *m, | |
1183 | struct node *n, | |
1184 | bool require_fallback, | |
1185 | bool *found_object) { | |
1186 | ||
4afd3348 LP |
1187 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
1188 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
992c052c | 1189 | _cleanup_set_free_free_ Set *s = NULL; |
943c3f94 DH |
1190 | Iterator i; |
1191 | char *path; | |
992c052c LP |
1192 | int r; |
1193 | ||
1194 | assert(bus); | |
1195 | assert(m); | |
1196 | assert(n); | |
1197 | assert(found_object); | |
1198 | ||
943c3f94 DH |
1199 | /* Spec says, GetManagedObjects() is only implemented on the root of a |
1200 | * sub-tree. Therefore, we require a registered object-manager on | |
1201 | * exactly the queried path, otherwise, we refuse to respond. */ | |
1202 | ||
1203 | if (require_fallback || !n->object_managers) | |
992c052c LP |
1204 | return 0; |
1205 | ||
44eb1add | 1206 | r = get_child_nodes(bus, m->path, n, CHILDREN_RECURSIVE, &s, &error); |
992c052c | 1207 | if (r < 0) |
f2bfc6ba | 1208 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
1209 | if (bus->nodes_modified) |
1210 | return 0; | |
992c052c | 1211 | |
df2d202e | 1212 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
1213 | if (r < 0) |
1214 | return r; | |
1215 | ||
1216 | r = sd_bus_message_open_container(reply, 'a', "{oa{sa{sv}}}"); | |
1217 | if (r < 0) | |
1218 | return r; | |
1219 | ||
943c3f94 DH |
1220 | SET_FOREACH(path, s, i) { |
1221 | r = object_manager_serialize_path_and_fallbacks(bus, reply, path, &error); | |
1222 | if (r < 0) | |
f2bfc6ba | 1223 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 1224 | |
943c3f94 | 1225 | if (bus->nodes_modified) |
992c052c | 1226 | return 0; |
992c052c LP |
1227 | } |
1228 | ||
1229 | r = sd_bus_message_close_container(reply); | |
1230 | if (r < 0) | |
1231 | return r; | |
1232 | ||
1233 | r = sd_bus_send(bus, reply, NULL); | |
1234 | if (r < 0) | |
1235 | return r; | |
1236 | ||
1237 | return 1; | |
1238 | } | |
1239 | ||
1240 | static int object_find_and_run( | |
1241 | sd_bus *bus, | |
1242 | sd_bus_message *m, | |
1243 | const char *p, | |
1244 | bool require_fallback, | |
1245 | bool *found_object) { | |
1246 | ||
1247 | struct node *n; | |
1248 | struct vtable_member vtable_key, *v; | |
1249 | int r; | |
1250 | ||
1251 | assert(bus); | |
1252 | assert(m); | |
1253 | assert(p); | |
1254 | assert(found_object); | |
1255 | ||
1256 | n = hashmap_get(bus->nodes, p); | |
1257 | if (!n) | |
1258 | return 0; | |
1259 | ||
1260 | /* First, try object callbacks */ | |
1261 | r = node_callbacks_run(bus, m, n->callbacks, require_fallback, found_object); | |
1262 | if (r != 0) | |
1263 | return r; | |
68313d3d LP |
1264 | if (bus->nodes_modified) |
1265 | return 0; | |
992c052c LP |
1266 | |
1267 | if (!m->interface || !m->member) | |
1268 | return 0; | |
1269 | ||
1270 | /* Then, look for a known method */ | |
1271 | vtable_key.path = (char*) p; | |
1272 | vtable_key.interface = m->interface; | |
1273 | vtable_key.member = m->member; | |
1274 | ||
1275 | v = hashmap_get(bus->vtable_methods, &vtable_key); | |
1276 | if (v) { | |
1277 | r = method_callbacks_run(bus, m, v, require_fallback, found_object); | |
1278 | if (r != 0) | |
1279 | return r; | |
68313d3d LP |
1280 | if (bus->nodes_modified) |
1281 | return 0; | |
992c052c LP |
1282 | } |
1283 | ||
1284 | /* Then, look for a known property */ | |
1285 | if (streq(m->interface, "org.freedesktop.DBus.Properties")) { | |
1286 | bool get = false; | |
1287 | ||
1288 | get = streq(m->member, "Get"); | |
1289 | ||
1290 | if (get || streq(m->member, "Set")) { | |
1291 | ||
1292 | r = sd_bus_message_rewind(m, true); | |
1293 | if (r < 0) | |
1294 | return r; | |
1295 | ||
1296 | vtable_key.path = (char*) p; | |
1297 | ||
1298 | r = sd_bus_message_read(m, "ss", &vtable_key.interface, &vtable_key.member); | |
1299 | if (r < 0) | |
0fc5ab90 | 1300 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface and member parameters"); |
992c052c LP |
1301 | |
1302 | v = hashmap_get(bus->vtable_properties, &vtable_key); | |
1303 | if (v) { | |
1304 | r = property_get_set_callbacks_run(bus, m, v, require_fallback, get, found_object); | |
1305 | if (r != 0) | |
1306 | return r; | |
1307 | } | |
1308 | ||
1309 | } else if (streq(m->member, "GetAll")) { | |
1310 | const char *iface; | |
1311 | ||
1312 | r = sd_bus_message_rewind(m, true); | |
1313 | if (r < 0) | |
1314 | return r; | |
1315 | ||
1316 | r = sd_bus_message_read(m, "s", &iface); | |
1317 | if (r < 0) | |
0fc5ab90 | 1318 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface parameter"); |
992c052c LP |
1319 | |
1320 | if (iface[0] == 0) | |
1321 | iface = NULL; | |
1322 | ||
1323 | r = property_get_all_callbacks_run(bus, m, n->vtables, require_fallback, iface, found_object); | |
1324 | if (r != 0) | |
1325 | return r; | |
1326 | } | |
1327 | ||
1328 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) { | |
1329 | ||
0fc5ab90 LP |
1330 | if (!isempty(sd_bus_message_get_signature(m, true))) |
1331 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
1332 | ||
992c052c LP |
1333 | r = process_introspect(bus, m, n, require_fallback, found_object); |
1334 | if (r != 0) | |
1335 | return r; | |
1336 | ||
1337 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.ObjectManager", "GetManagedObjects")) { | |
1338 | ||
0fc5ab90 LP |
1339 | if (!isempty(sd_bus_message_get_signature(m, true))) |
1340 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
1341 | ||
992c052c LP |
1342 | r = process_get_managed_objects(bus, m, n, require_fallback, found_object); |
1343 | if (r != 0) | |
1344 | return r; | |
1345 | } | |
1346 | ||
68313d3d LP |
1347 | if (bus->nodes_modified) |
1348 | return 0; | |
1349 | ||
992c052c LP |
1350 | if (!*found_object) { |
1351 | r = bus_node_exists(bus, n, m->path, require_fallback); | |
1352 | if (r < 0) | |
f2bfc6ba | 1353 | return bus_maybe_reply_error(m, r, NULL); |
ff02f101 DH |
1354 | if (bus->nodes_modified) |
1355 | return 0; | |
992c052c LP |
1356 | if (r > 0) |
1357 | *found_object = true; | |
1358 | } | |
1359 | ||
1360 | return 0; | |
1361 | } | |
1362 | ||
1363 | int bus_process_object(sd_bus *bus, sd_bus_message *m) { | |
1364 | int r; | |
1365 | size_t pl; | |
1366 | bool found_object = false; | |
1367 | ||
1368 | assert(bus); | |
1369 | assert(m); | |
1370 | ||
09365592 LP |
1371 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1372 | return 0; | |
1373 | ||
40ca29a1 | 1374 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
992c052c LP |
1375 | return 0; |
1376 | ||
992c052c LP |
1377 | if (hashmap_isempty(bus->nodes)) |
1378 | return 0; | |
1379 | ||
f820cf99 LP |
1380 | /* Never respond to broadcast messages */ |
1381 | if (bus->bus_client && !m->destination) | |
1382 | return 0; | |
1383 | ||
adacb957 LP |
1384 | assert(m->path); |
1385 | assert(m->member); | |
1386 | ||
992c052c LP |
1387 | pl = strlen(m->path); |
1388 | do { | |
92e189e5 | 1389 | char prefix[pl+1]; |
992c052c LP |
1390 | |
1391 | bus->nodes_modified = false; | |
1392 | ||
1393 | r = object_find_and_run(bus, m, m->path, false, &found_object); | |
1394 | if (r != 0) | |
1395 | return r; | |
1396 | ||
1397 | /* Look for fallback prefixes */ | |
92e189e5 | 1398 | OBJECT_PATH_FOREACH_PREFIX(prefix, m->path) { |
992c052c LP |
1399 | |
1400 | if (bus->nodes_modified) | |
1401 | break; | |
1402 | ||
92e189e5 | 1403 | r = object_find_and_run(bus, m, prefix, true, &found_object); |
992c052c LP |
1404 | if (r != 0) |
1405 | return r; | |
1406 | } | |
1407 | ||
1408 | } while (bus->nodes_modified); | |
1409 | ||
1410 | if (!found_object) | |
1411 | return 0; | |
1412 | ||
1413 | if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Get") || | |
1414 | sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Set")) | |
1415 | r = sd_bus_reply_method_errorf( | |
df2d202e | 1416 | m, |
40ca29a1 | 1417 | SD_BUS_ERROR_UNKNOWN_PROPERTY, |
992c052c LP |
1418 | "Unknown property or interface."); |
1419 | else | |
1420 | r = sd_bus_reply_method_errorf( | |
df2d202e | 1421 | m, |
40ca29a1 | 1422 | SD_BUS_ERROR_UNKNOWN_METHOD, |
992c052c LP |
1423 | "Unknown method '%s' or interface '%s'.", m->member, m->interface); |
1424 | ||
1425 | if (r < 0) | |
1426 | return r; | |
1427 | ||
1428 | return 1; | |
1429 | } | |
1430 | ||
1431 | static struct node *bus_node_allocate(sd_bus *bus, const char *path) { | |
1432 | struct node *n, *parent; | |
1433 | const char *e; | |
2fd069b1 ZJS |
1434 | _cleanup_free_ char *s = NULL; |
1435 | char *p; | |
992c052c LP |
1436 | int r; |
1437 | ||
1438 | assert(bus); | |
1439 | assert(path); | |
1440 | assert(path[0] == '/'); | |
1441 | ||
1442 | n = hashmap_get(bus->nodes, path); | |
1443 | if (n) | |
1444 | return n; | |
1445 | ||
d5099efc | 1446 | r = hashmap_ensure_allocated(&bus->nodes, &string_hash_ops); |
992c052c LP |
1447 | if (r < 0) |
1448 | return NULL; | |
1449 | ||
1450 | s = strdup(path); | |
1451 | if (!s) | |
1452 | return NULL; | |
1453 | ||
1454 | if (streq(path, "/")) | |
1455 | parent = NULL; | |
1456 | else { | |
1457 | e = strrchr(path, '/'); | |
1458 | assert(e); | |
1459 | ||
7d67077f | 1460 | p = strndupa(path, MAX(1, e - path)); |
992c052c LP |
1461 | |
1462 | parent = bus_node_allocate(bus, p); | |
2fd069b1 | 1463 | if (!parent) |
992c052c | 1464 | return NULL; |
992c052c LP |
1465 | } |
1466 | ||
1467 | n = new0(struct node, 1); | |
1468 | if (!n) | |
1469 | return NULL; | |
1470 | ||
1471 | n->parent = parent; | |
1472 | n->path = s; | |
2fd069b1 | 1473 | s = NULL; /* do not free */ |
992c052c | 1474 | |
8e050193 | 1475 | r = hashmap_put(bus->nodes, n->path, n); |
992c052c | 1476 | if (r < 0) { |
2fd069b1 | 1477 | free(n->path); |
992c052c LP |
1478 | free(n); |
1479 | return NULL; | |
1480 | } | |
1481 | ||
1482 | if (parent) | |
71fda00f | 1483 | LIST_PREPEND(siblings, parent->child, n); |
992c052c LP |
1484 | |
1485 | return n; | |
1486 | } | |
1487 | ||
19befb2d | 1488 | void bus_node_gc(sd_bus *b, struct node *n) { |
992c052c LP |
1489 | assert(b); |
1490 | ||
1491 | if (!n) | |
1492 | return; | |
1493 | ||
1494 | if (n->child || | |
1495 | n->callbacks || | |
1496 | n->vtables || | |
1497 | n->enumerators || | |
19befb2d | 1498 | n->object_managers) |
992c052c LP |
1499 | return; |
1500 | ||
1501 | assert(hashmap_remove(b->nodes, n->path) == n); | |
1502 | ||
1503 | if (n->parent) | |
71fda00f | 1504 | LIST_REMOVE(siblings, n->parent->child, n); |
992c052c LP |
1505 | |
1506 | free(n->path); | |
1507 | bus_node_gc(b, n->parent); | |
1508 | free(n); | |
1509 | } | |
1510 | ||
2d5c8a27 DH |
1511 | static int bus_find_parent_object_manager(sd_bus *bus, struct node **out, const char *path) { |
1512 | struct node *n; | |
1513 | ||
1514 | assert(bus); | |
1515 | assert(path); | |
1516 | ||
1517 | n = hashmap_get(bus->nodes, path); | |
1518 | if (!n) { | |
1519 | char *prefix; | |
1520 | ||
1521 | prefix = alloca(strlen(path) + 1); | |
1522 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
1523 | n = hashmap_get(bus->nodes, prefix); | |
1524 | if (n) | |
1525 | break; | |
1526 | } | |
1527 | } | |
1528 | ||
1529 | while (n && !n->object_managers) | |
1530 | n = n->parent; | |
1531 | ||
1532 | if (out) | |
1533 | *out = n; | |
1534 | return !!n; | |
1535 | } | |
1536 | ||
992c052c | 1537 | static int bus_add_object( |
dfa92725 | 1538 | sd_bus *bus, |
19befb2d | 1539 | sd_bus_slot **slot, |
992c052c LP |
1540 | bool fallback, |
1541 | const char *path, | |
1542 | sd_bus_message_handler_t callback, | |
1543 | void *userdata) { | |
1544 | ||
19befb2d | 1545 | sd_bus_slot *s; |
992c052c LP |
1546 | struct node *n; |
1547 | int r; | |
1548 | ||
dfa92725 LP |
1549 | assert_return(bus, -EINVAL); |
1550 | assert_return(object_path_is_valid(path), -EINVAL); | |
1551 | assert_return(callback, -EINVAL); | |
1552 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c | 1553 | |
dfa92725 | 1554 | n = bus_node_allocate(bus, path); |
992c052c LP |
1555 | if (!n) |
1556 | return -ENOMEM; | |
1557 | ||
19befb2d LP |
1558 | s = bus_slot_allocate(bus, !slot, BUS_NODE_CALLBACK, sizeof(struct node_callback), userdata); |
1559 | if (!s) { | |
992c052c LP |
1560 | r = -ENOMEM; |
1561 | goto fail; | |
1562 | } | |
1563 | ||
19befb2d LP |
1564 | s->node_callback.callback = callback; |
1565 | s->node_callback.is_fallback = fallback; | |
992c052c | 1566 | |
19befb2d LP |
1567 | s->node_callback.node = n; |
1568 | LIST_PREPEND(callbacks, n->callbacks, &s->node_callback); | |
68313d3d LP |
1569 | bus->nodes_modified = true; |
1570 | ||
19befb2d LP |
1571 | if (slot) |
1572 | *slot = s; | |
1573 | ||
992c052c LP |
1574 | return 0; |
1575 | ||
1576 | fail: | |
19befb2d | 1577 | sd_bus_slot_unref(s); |
dfa92725 | 1578 | bus_node_gc(bus, n); |
19befb2d | 1579 | |
992c052c LP |
1580 | return r; |
1581 | } | |
1582 | ||
19befb2d | 1583 | _public_ int sd_bus_add_object( |
992c052c | 1584 | sd_bus *bus, |
19befb2d | 1585 | sd_bus_slot **slot, |
992c052c LP |
1586 | const char *path, |
1587 | sd_bus_message_handler_t callback, | |
1588 | void *userdata) { | |
1589 | ||
19befb2d | 1590 | return bus_add_object(bus, slot, false, path, callback, userdata); |
992c052c LP |
1591 | } |
1592 | ||
19befb2d LP |
1593 | _public_ int sd_bus_add_fallback( |
1594 | sd_bus *bus, | |
1595 | sd_bus_slot **slot, | |
1596 | const char *prefix, | |
1597 | sd_bus_message_handler_t callback, | |
1598 | void *userdata) { | |
992c052c | 1599 | |
19befb2d | 1600 | return bus_add_object(bus, slot, true, prefix, callback, userdata); |
992c052c LP |
1601 | } |
1602 | ||
b826ab58 | 1603 | static void vtable_member_hash_func(const void *a, struct siphash *state) { |
992c052c LP |
1604 | const struct vtable_member *m = a; |
1605 | ||
dfa92725 LP |
1606 | assert(m); |
1607 | ||
b826ab58 TG |
1608 | string_hash_func(m->path, state); |
1609 | string_hash_func(m->interface, state); | |
1610 | string_hash_func(m->member, state); | |
992c052c LP |
1611 | } |
1612 | ||
1613 | static int vtable_member_compare_func(const void *a, const void *b) { | |
1614 | const struct vtable_member *x = a, *y = b; | |
1615 | int r; | |
1616 | ||
dfa92725 LP |
1617 | assert(x); |
1618 | assert(y); | |
1619 | ||
992c052c LP |
1620 | r = strcmp(x->path, y->path); |
1621 | if (r != 0) | |
1622 | return r; | |
1623 | ||
1624 | r = strcmp(x->interface, y->interface); | |
1625 | if (r != 0) | |
1626 | return r; | |
1627 | ||
1628 | return strcmp(x->member, y->member); | |
1629 | } | |
1630 | ||
d5099efc MS |
1631 | static const struct hash_ops vtable_member_hash_ops = { |
1632 | .hash = vtable_member_hash_func, | |
1633 | .compare = vtable_member_compare_func | |
1634 | }; | |
1635 | ||
992c052c LP |
1636 | static int add_object_vtable_internal( |
1637 | sd_bus *bus, | |
19befb2d | 1638 | sd_bus_slot **slot, |
992c052c LP |
1639 | const char *path, |
1640 | const char *interface, | |
1641 | const sd_bus_vtable *vtable, | |
1642 | bool fallback, | |
1643 | sd_bus_object_find_t find, | |
1644 | void *userdata) { | |
1645 | ||
2915234d | 1646 | sd_bus_slot *s = NULL; |
19befb2d | 1647 | struct node_vtable *i, *existing = NULL; |
992c052c LP |
1648 | const sd_bus_vtable *v; |
1649 | struct node *n; | |
1650 | int r; | |
1651 | ||
dfa92725 LP |
1652 | assert_return(bus, -EINVAL); |
1653 | assert_return(object_path_is_valid(path), -EINVAL); | |
1654 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
1655 | assert_return(vtable, -EINVAL); | |
1656 | assert_return(vtable[0].type == _SD_BUS_VTABLE_START, -EINVAL); | |
1657 | assert_return(vtable[0].x.start.element_size == sizeof(struct sd_bus_vtable), -EINVAL); | |
1658 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
718db961 LP |
1659 | assert_return(!streq(interface, "org.freedesktop.DBus.Properties") && |
1660 | !streq(interface, "org.freedesktop.DBus.Introspectable") && | |
1661 | !streq(interface, "org.freedesktop.DBus.Peer") && | |
1662 | !streq(interface, "org.freedesktop.DBus.ObjectManager"), -EINVAL); | |
992c052c | 1663 | |
d5099efc | 1664 | r = hashmap_ensure_allocated(&bus->vtable_methods, &vtable_member_hash_ops); |
992c052c LP |
1665 | if (r < 0) |
1666 | return r; | |
1667 | ||
d5099efc | 1668 | r = hashmap_ensure_allocated(&bus->vtable_properties, &vtable_member_hash_ops); |
992c052c LP |
1669 | if (r < 0) |
1670 | return r; | |
1671 | ||
1672 | n = bus_node_allocate(bus, path); | |
1673 | if (!n) | |
1674 | return -ENOMEM; | |
1675 | ||
1676 | LIST_FOREACH(vtables, i, n->vtables) { | |
992c052c LP |
1677 | if (i->is_fallback != fallback) { |
1678 | r = -EPROTOTYPE; | |
1679 | goto fail; | |
1680 | } | |
718db961 LP |
1681 | |
1682 | if (streq(i->interface, interface)) { | |
1683 | ||
1684 | if (i->vtable == vtable) { | |
1685 | r = -EEXIST; | |
1686 | goto fail; | |
1687 | } | |
1688 | ||
1689 | existing = i; | |
1690 | } | |
992c052c LP |
1691 | } |
1692 | ||
19befb2d LP |
1693 | s = bus_slot_allocate(bus, !slot, BUS_NODE_VTABLE, sizeof(struct node_vtable), userdata); |
1694 | if (!s) { | |
992c052c LP |
1695 | r = -ENOMEM; |
1696 | goto fail; | |
1697 | } | |
1698 | ||
19befb2d LP |
1699 | s->node_vtable.is_fallback = fallback; |
1700 | s->node_vtable.vtable = vtable; | |
1701 | s->node_vtable.find = find; | |
992c052c | 1702 | |
19befb2d LP |
1703 | s->node_vtable.interface = strdup(interface); |
1704 | if (!s->node_vtable.interface) { | |
992c052c LP |
1705 | r = -ENOMEM; |
1706 | goto fail; | |
1707 | } | |
1708 | ||
19befb2d | 1709 | for (v = s->node_vtable.vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
992c052c LP |
1710 | |
1711 | switch (v->type) { | |
1712 | ||
1713 | case _SD_BUS_VTABLE_METHOD: { | |
1714 | struct vtable_member *m; | |
1715 | ||
77a874a3 LP |
1716 | if (!member_name_is_valid(v->x.method.member) || |
1717 | !signature_is_valid(strempty(v->x.method.signature), false) || | |
1718 | !signature_is_valid(strempty(v->x.method.result), false) || | |
1719 | !(v->x.method.handler || (isempty(v->x.method.signature) && isempty(v->x.method.result))) || | |
df98a87b | 1720 | v->flags & (SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) { |
992c052c LP |
1721 | r = -EINVAL; |
1722 | goto fail; | |
1723 | } | |
1724 | ||
1725 | m = new0(struct vtable_member, 1); | |
1726 | if (!m) { | |
1727 | r = -ENOMEM; | |
1728 | goto fail; | |
1729 | } | |
1730 | ||
19befb2d | 1731 | m->parent = &s->node_vtable; |
992c052c | 1732 | m->path = n->path; |
19befb2d | 1733 | m->interface = s->node_vtable.interface; |
77a874a3 | 1734 | m->member = v->x.method.member; |
992c052c LP |
1735 | m->vtable = v; |
1736 | ||
1737 | r = hashmap_put(bus->vtable_methods, m, m); | |
1738 | if (r < 0) { | |
1739 | free(m); | |
1740 | goto fail; | |
1741 | } | |
1742 | ||
1743 | break; | |
1744 | } | |
1745 | ||
1746 | case _SD_BUS_VTABLE_WRITABLE_PROPERTY: | |
1747 | ||
77a874a3 | 1748 | if (!(v->x.property.set || bus_type_is_basic(v->x.property.signature[0]))) { |
992c052c LP |
1749 | r = -EINVAL; |
1750 | goto fail; | |
1751 | } | |
9b772efb LP |
1752 | |
1753 | if (v->flags & SD_BUS_VTABLE_PROPERTY_CONST) { | |
1754 | r = -EINVAL; | |
1755 | goto fail; | |
1756 | } | |
992c052c LP |
1757 | |
1758 | /* Fall through */ | |
1759 | ||
1760 | case _SD_BUS_VTABLE_PROPERTY: { | |
1761 | struct vtable_member *m; | |
1762 | ||
77a874a3 LP |
1763 | if (!member_name_is_valid(v->x.property.member) || |
1764 | !signature_is_single(v->x.property.signature, false) || | |
c13c7de3 | 1765 | !(v->x.property.get || bus_type_is_basic(v->x.property.signature[0]) || streq(v->x.property.signature, "as")) || |
33702051 | 1766 | (v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY) || |
df98a87b | 1767 | (!!(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 | 1768 | ((v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) && (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT)) || |
adacb957 | 1769 | (v->flags & SD_BUS_VTABLE_UNPRIVILEGED && v->type == _SD_BUS_VTABLE_PROPERTY)) { |
992c052c LP |
1770 | r = -EINVAL; |
1771 | goto fail; | |
1772 | } | |
1773 | ||
992c052c LP |
1774 | m = new0(struct vtable_member, 1); |
1775 | if (!m) { | |
1776 | r = -ENOMEM; | |
1777 | goto fail; | |
1778 | } | |
1779 | ||
19befb2d | 1780 | m->parent = &s->node_vtable; |
992c052c | 1781 | m->path = n->path; |
19befb2d | 1782 | m->interface = s->node_vtable.interface; |
77a874a3 | 1783 | m->member = v->x.property.member; |
992c052c LP |
1784 | m->vtable = v; |
1785 | ||
1786 | r = hashmap_put(bus->vtable_properties, m, m); | |
1787 | if (r < 0) { | |
1788 | free(m); | |
1789 | goto fail; | |
1790 | } | |
1791 | ||
1792 | break; | |
1793 | } | |
1794 | ||
1795 | case _SD_BUS_VTABLE_SIGNAL: | |
1796 | ||
77a874a3 | 1797 | if (!member_name_is_valid(v->x.signal.member) || |
adacb957 LP |
1798 | !signature_is_valid(strempty(v->x.signal.signature), false) || |
1799 | v->flags & SD_BUS_VTABLE_UNPRIVILEGED) { | |
992c052c LP |
1800 | r = -EINVAL; |
1801 | goto fail; | |
1802 | } | |
1803 | ||
1804 | break; | |
1805 | ||
1806 | default: | |
1807 | r = -EINVAL; | |
1808 | goto fail; | |
1809 | } | |
1810 | } | |
1811 | ||
19befb2d LP |
1812 | s->node_vtable.node = n; |
1813 | LIST_INSERT_AFTER(vtables, n->vtables, existing, &s->node_vtable); | |
68313d3d LP |
1814 | bus->nodes_modified = true; |
1815 | ||
19befb2d LP |
1816 | if (slot) |
1817 | *slot = s; | |
1818 | ||
992c052c LP |
1819 | return 0; |
1820 | ||
1821 | fail: | |
19befb2d | 1822 | sd_bus_slot_unref(s); |
dfa92725 LP |
1823 | bus_node_gc(bus, n); |
1824 | ||
19befb2d | 1825 | return r; |
992c052c LP |
1826 | } |
1827 | ||
d9f644e2 | 1828 | _public_ int sd_bus_add_object_vtable( |
992c052c | 1829 | sd_bus *bus, |
19befb2d | 1830 | sd_bus_slot **slot, |
992c052c LP |
1831 | const char *path, |
1832 | const char *interface, | |
1833 | const sd_bus_vtable *vtable, | |
1834 | void *userdata) { | |
1835 | ||
19befb2d | 1836 | return add_object_vtable_internal(bus, slot, path, interface, vtable, false, NULL, userdata); |
992c052c LP |
1837 | } |
1838 | ||
d9f644e2 | 1839 | _public_ int sd_bus_add_fallback_vtable( |
992c052c | 1840 | sd_bus *bus, |
19befb2d LP |
1841 | sd_bus_slot **slot, |
1842 | const char *prefix, | |
718db961 LP |
1843 | const char *interface, |
1844 | const sd_bus_vtable *vtable, | |
1845 | sd_bus_object_find_t find, | |
1846 | void *userdata) { | |
992c052c | 1847 | |
19befb2d | 1848 | return add_object_vtable_internal(bus, slot, prefix, interface, vtable, true, find, userdata); |
992c052c LP |
1849 | } |
1850 | ||
d9f644e2 | 1851 | _public_ int sd_bus_add_node_enumerator( |
992c052c | 1852 | sd_bus *bus, |
19befb2d | 1853 | sd_bus_slot **slot, |
992c052c LP |
1854 | const char *path, |
1855 | sd_bus_node_enumerator_t callback, | |
1856 | void *userdata) { | |
1857 | ||
19befb2d | 1858 | sd_bus_slot *s; |
992c052c LP |
1859 | struct node *n; |
1860 | int r; | |
1861 | ||
dfa92725 LP |
1862 | assert_return(bus, -EINVAL); |
1863 | assert_return(object_path_is_valid(path), -EINVAL); | |
1864 | assert_return(callback, -EINVAL); | |
1865 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c LP |
1866 | |
1867 | n = bus_node_allocate(bus, path); | |
1868 | if (!n) | |
1869 | return -ENOMEM; | |
1870 | ||
19befb2d LP |
1871 | s = bus_slot_allocate(bus, !slot, BUS_NODE_ENUMERATOR, sizeof(struct node_enumerator), userdata); |
1872 | if (!s) { | |
992c052c LP |
1873 | r = -ENOMEM; |
1874 | goto fail; | |
1875 | } | |
1876 | ||
19befb2d | 1877 | s->node_enumerator.callback = callback; |
68313d3d | 1878 | |
19befb2d LP |
1879 | s->node_enumerator.node = n; |
1880 | LIST_PREPEND(enumerators, n->enumerators, &s->node_enumerator); | |
68313d3d LP |
1881 | bus->nodes_modified = true; |
1882 | ||
19befb2d LP |
1883 | if (slot) |
1884 | *slot = s; | |
1885 | ||
992c052c LP |
1886 | return 0; |
1887 | ||
1888 | fail: | |
19befb2d | 1889 | sd_bus_slot_unref(s); |
992c052c LP |
1890 | bus_node_gc(bus, n); |
1891 | ||
19befb2d | 1892 | return r; |
992c052c LP |
1893 | } |
1894 | ||
1895 | static int emit_properties_changed_on_interface( | |
1896 | sd_bus *bus, | |
1897 | const char *prefix, | |
1898 | const char *path, | |
1899 | const char *interface, | |
1900 | bool require_fallback, | |
46525bfc | 1901 | bool *found_interface, |
992c052c LP |
1902 | char **names) { |
1903 | ||
4afd3348 LP |
1904 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
1905 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
718db961 LP |
1906 | bool has_invalidating = false, has_changing = false; |
1907 | struct vtable_member key = {}; | |
992c052c LP |
1908 | struct node_vtable *c; |
1909 | struct node *n; | |
1910 | char **property; | |
1911 | void *u = NULL; | |
1912 | int r; | |
1913 | ||
1914 | assert(bus); | |
dfa92725 | 1915 | assert(prefix); |
992c052c LP |
1916 | assert(path); |
1917 | assert(interface); | |
46525bfc | 1918 | assert(found_interface); |
992c052c LP |
1919 | |
1920 | n = hashmap_get(bus->nodes, prefix); | |
1921 | if (!n) | |
1922 | return 0; | |
1923 | ||
151b9b96 | 1924 | r = sd_bus_message_new_signal(bus, &m, path, "org.freedesktop.DBus.Properties", "PropertiesChanged"); |
992c052c LP |
1925 | if (r < 0) |
1926 | return r; | |
1927 | ||
1928 | r = sd_bus_message_append(m, "s", interface); | |
1929 | if (r < 0) | |
1930 | return r; | |
1931 | ||
1932 | r = sd_bus_message_open_container(m, 'a', "{sv}"); | |
1933 | if (r < 0) | |
1934 | return r; | |
1935 | ||
1936 | key.path = prefix; | |
1937 | key.interface = interface; | |
1938 | ||
718db961 LP |
1939 | LIST_FOREACH(vtables, c, n->vtables) { |
1940 | if (require_fallback && !c->is_fallback) | |
1941 | continue; | |
992c052c | 1942 | |
718db961 | 1943 | if (!streq(c->interface, interface)) |
992c052c | 1944 | continue; |
992c052c | 1945 | |
f00c3121 | 1946 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
992c052c LP |
1947 | if (r < 0) |
1948 | return r; | |
718db961 LP |
1949 | if (bus->nodes_modified) |
1950 | return 0; | |
1951 | if (r == 0) | |
1952 | continue; | |
992c052c | 1953 | |
46525bfc LP |
1954 | *found_interface = true; |
1955 | ||
a03e4337 LP |
1956 | if (names) { |
1957 | /* If the caller specified a list of | |
1958 | * properties we include exactly those in the | |
1959 | * PropertiesChanged message */ | |
992c052c | 1960 | |
a03e4337 LP |
1961 | STRV_FOREACH(property, names) { |
1962 | struct vtable_member *v; | |
992c052c | 1963 | |
a03e4337 | 1964 | assert_return(member_name_is_valid(*property), -EINVAL); |
718db961 | 1965 | |
a03e4337 LP |
1966 | key.member = *property; |
1967 | v = hashmap_get(bus->vtable_properties, &key); | |
1968 | if (!v) | |
1969 | return -ENOENT; | |
1970 | ||
1971 | /* If there are two vtables for the same | |
1972 | * interface, let's handle this property when | |
1973 | * we come to that vtable. */ | |
1974 | if (c != v->parent) | |
1975 | continue; | |
992c052c | 1976 | |
a03e4337 LP |
1977 | assert_return(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE || |
1978 | v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION, -EDOM); | |
992c052c | 1979 | |
a03e4337 LP |
1980 | assert_return(!(v->vtable->flags & SD_BUS_VTABLE_HIDDEN), -EDOM); |
1981 | ||
1982 | if (v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) { | |
1983 | has_invalidating = true; | |
1984 | continue; | |
1985 | } | |
1986 | ||
1987 | has_changing = true; | |
1988 | ||
1989 | r = vtable_append_one_property(bus, m, m->path, c, v->vtable, u, &error); | |
1990 | if (r < 0) | |
1991 | return r; | |
1992 | if (bus->nodes_modified) | |
1993 | return 0; | |
718db961 | 1994 | } |
a03e4337 LP |
1995 | } else { |
1996 | const sd_bus_vtable *v; | |
718db961 | 1997 | |
a03e4337 LP |
1998 | /* If the caller specified no properties list |
1999 | * we include all properties that are marked | |
2000 | * as changing in the message. */ | |
718db961 | 2001 | |
a03e4337 LP |
2002 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
2003 | if (v->type != _SD_BUS_VTABLE_PROPERTY && v->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) | |
2004 | continue; | |
718db961 | 2005 | |
a03e4337 LP |
2006 | if (v->flags & SD_BUS_VTABLE_HIDDEN) |
2007 | continue; | |
718db961 | 2008 | |
a03e4337 LP |
2009 | if (v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) { |
2010 | has_invalidating = true; | |
2011 | continue; | |
2012 | } | |
718db961 | 2013 | |
a03e4337 LP |
2014 | if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE)) |
2015 | continue; | |
718db961 | 2016 | |
a03e4337 | 2017 | has_changing = true; |
718db961 | 2018 | |
a03e4337 LP |
2019 | r = vtable_append_one_property(bus, m, m->path, c, v, u, &error); |
2020 | if (r < 0) | |
2021 | return r; | |
2022 | if (bus->nodes_modified) | |
2023 | return 0; | |
2024 | } | |
718db961 | 2025 | } |
992c052c LP |
2026 | } |
2027 | ||
718db961 LP |
2028 | if (!has_invalidating && !has_changing) |
2029 | return 0; | |
2030 | ||
992c052c LP |
2031 | r = sd_bus_message_close_container(m); |
2032 | if (r < 0) | |
2033 | return r; | |
2034 | ||
2035 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2036 | if (r < 0) | |
2037 | return r; | |
2038 | ||
2039 | if (has_invalidating) { | |
718db961 LP |
2040 | LIST_FOREACH(vtables, c, n->vtables) { |
2041 | if (require_fallback && !c->is_fallback) | |
2042 | continue; | |
992c052c | 2043 | |
718db961 | 2044 | if (!streq(c->interface, interface)) |
992c052c LP |
2045 | continue; |
2046 | ||
f00c3121 | 2047 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
992c052c LP |
2048 | if (r < 0) |
2049 | return r; | |
718db961 LP |
2050 | if (bus->nodes_modified) |
2051 | return 0; | |
2052 | if (r == 0) | |
2053 | continue; | |
2054 | ||
a03e4337 LP |
2055 | if (names) { |
2056 | STRV_FOREACH(property, names) { | |
2057 | struct vtable_member *v; | |
718db961 | 2058 | |
a03e4337 LP |
2059 | key.member = *property; |
2060 | assert_se(v = hashmap_get(bus->vtable_properties, &key)); | |
2061 | assert(c == v->parent); | |
718db961 | 2062 | |
a03e4337 LP |
2063 | if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) |
2064 | continue; | |
718db961 | 2065 | |
a03e4337 LP |
2066 | r = sd_bus_message_append(m, "s", *property); |
2067 | if (r < 0) | |
2068 | return r; | |
2069 | } | |
2070 | } else { | |
2071 | const sd_bus_vtable *v; | |
2072 | ||
2073 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { | |
2074 | if (v->type != _SD_BUS_VTABLE_PROPERTY && v->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) | |
2075 | continue; | |
2076 | ||
2077 | if (v->flags & SD_BUS_VTABLE_HIDDEN) | |
2078 | continue; | |
2079 | ||
2080 | if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) | |
2081 | continue; | |
2082 | ||
2083 | r = sd_bus_message_append(m, "s", v->x.property.member); | |
2084 | if (r < 0) | |
2085 | return r; | |
2086 | } | |
718db961 | 2087 | } |
992c052c LP |
2088 | } |
2089 | } | |
2090 | ||
2091 | r = sd_bus_message_close_container(m); | |
2092 | if (r < 0) | |
2093 | return r; | |
2094 | ||
2095 | r = sd_bus_send(bus, m, NULL); | |
2096 | if (r < 0) | |
2097 | return r; | |
2098 | ||
2099 | return 1; | |
2100 | } | |
2101 | ||
d9f644e2 | 2102 | _public_ int sd_bus_emit_properties_changed_strv( |
dfa92725 LP |
2103 | sd_bus *bus, |
2104 | const char *path, | |
2105 | const char *interface, | |
2106 | char **names) { | |
2107 | ||
8ce2afd6 | 2108 | BUS_DONT_DESTROY(bus); |
46525bfc | 2109 | bool found_interface = false; |
92e189e5 | 2110 | char *prefix; |
992c052c LP |
2111 | int r; |
2112 | ||
dfa92725 LP |
2113 | assert_return(bus, -EINVAL); |
2114 | assert_return(object_path_is_valid(path), -EINVAL); | |
2115 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
dfa92725 LP |
2116 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2117 | ||
a3d59cd1 LP |
2118 | if (!BUS_IS_OPEN(bus->state)) |
2119 | return -ENOTCONN; | |
a03e4337 LP |
2120 | |
2121 | /* A non-NULL but empty names list means nothing needs to be | |
2122 | generated. A NULL list OTOH indicates that all properties | |
2123 | that are set to EMITS_CHANGE or EMITS_INVALIDATION shall be | |
2124 | included in the PropertiesChanged message. */ | |
2125 | if (names && names[0] == NULL) | |
dfa92725 | 2126 | return 0; |
992c052c | 2127 | |
68313d3d LP |
2128 | do { |
2129 | bus->nodes_modified = false; | |
992c052c | 2130 | |
46525bfc | 2131 | r = emit_properties_changed_on_interface(bus, path, path, interface, false, &found_interface, names); |
92e189e5 LP |
2132 | if (r != 0) |
2133 | return r; | |
68313d3d LP |
2134 | if (bus->nodes_modified) |
2135 | continue; | |
2136 | ||
2137 | prefix = alloca(strlen(path) + 1); | |
2138 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
46525bfc | 2139 | r = emit_properties_changed_on_interface(bus, prefix, path, interface, true, &found_interface, names); |
68313d3d LP |
2140 | if (r != 0) |
2141 | return r; | |
2142 | if (bus->nodes_modified) | |
2143 | break; | |
2144 | } | |
2145 | ||
2146 | } while (bus->nodes_modified); | |
992c052c | 2147 | |
46525bfc | 2148 | return found_interface ? 0 : -ENOENT; |
992c052c LP |
2149 | } |
2150 | ||
d9f644e2 | 2151 | _public_ int sd_bus_emit_properties_changed( |
dfa92725 LP |
2152 | sd_bus *bus, |
2153 | const char *path, | |
2154 | const char *interface, | |
2155 | const char *name, ...) { | |
2156 | ||
250a918d | 2157 | char **names; |
992c052c | 2158 | |
dfa92725 LP |
2159 | assert_return(bus, -EINVAL); |
2160 | assert_return(object_path_is_valid(path), -EINVAL); | |
2161 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
dfa92725 LP |
2162 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2163 | ||
a3d59cd1 LP |
2164 | if (!BUS_IS_OPEN(bus->state)) |
2165 | return -ENOTCONN; | |
2166 | ||
dfa92725 LP |
2167 | if (!name) |
2168 | return 0; | |
2169 | ||
250a918d | 2170 | names = strv_from_stdarg_alloca(name); |
992c052c LP |
2171 | |
2172 | return sd_bus_emit_properties_changed_strv(bus, path, interface, names); | |
2173 | } | |
2174 | ||
d95eb43e DH |
2175 | static int object_added_append_all_prefix( |
2176 | sd_bus *bus, | |
2177 | sd_bus_message *m, | |
2178 | Set *s, | |
2179 | const char *prefix, | |
2180 | const char *path, | |
2181 | bool require_fallback) { | |
2182 | ||
2183 | const char *previous_interface = NULL; | |
2184 | struct node_vtable *c; | |
2185 | struct node *n; | |
2186 | int r; | |
2187 | ||
2188 | assert(bus); | |
2189 | assert(m); | |
2190 | assert(s); | |
2191 | assert(prefix); | |
2192 | assert(path); | |
2193 | ||
2194 | n = hashmap_get(bus->nodes, prefix); | |
2195 | if (!n) | |
2196 | return 0; | |
2197 | ||
2198 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 2199 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
d95eb43e DH |
2200 | void *u = NULL; |
2201 | ||
2202 | if (require_fallback && !c->is_fallback) | |
2203 | continue; | |
2204 | ||
2205 | r = node_vtable_get_userdata(bus, path, c, &u, &error); | |
2206 | if (r < 0) | |
2207 | return r; | |
2208 | if (bus->nodes_modified) | |
2209 | return 0; | |
2210 | if (r == 0) | |
2211 | continue; | |
2212 | ||
2213 | if (!streq_ptr(c->interface, previous_interface)) { | |
2214 | /* If a child-node already handled this interface, we | |
2215 | * skip it on any of its parents. The child vtables | |
2216 | * always fully override any conflicting vtables of | |
2217 | * any parent node. */ | |
2218 | if (set_get(s, c->interface)) | |
2219 | continue; | |
2220 | ||
2221 | r = set_put(s, c->interface); | |
2222 | if (r < 0) | |
2223 | return r; | |
2224 | ||
2225 | if (previous_interface) { | |
2226 | r = sd_bus_message_close_container(m); | |
2227 | if (r < 0) | |
2228 | return r; | |
2229 | r = sd_bus_message_close_container(m); | |
2230 | if (r < 0) | |
2231 | return r; | |
2232 | } | |
2233 | ||
2234 | r = sd_bus_message_open_container(m, 'e', "sa{sv}"); | |
2235 | if (r < 0) | |
2236 | return r; | |
2237 | r = sd_bus_message_append(m, "s", c->interface); | |
2238 | if (r < 0) | |
2239 | return r; | |
2240 | r = sd_bus_message_open_container(m, 'a', "{sv}"); | |
2241 | if (r < 0) | |
2242 | return r; | |
2243 | ||
2244 | previous_interface = c->interface; | |
2245 | } | |
2246 | ||
2247 | r = vtable_append_all_properties(bus, m, path, c, u, &error); | |
2248 | if (r < 0) | |
2249 | return r; | |
2250 | if (bus->nodes_modified) | |
2251 | return 0; | |
2252 | } | |
2253 | ||
2254 | if (previous_interface) { | |
2255 | r = sd_bus_message_close_container(m); | |
2256 | if (r < 0) | |
2257 | return r; | |
2258 | r = sd_bus_message_close_container(m); | |
2259 | if (r < 0) | |
2260 | return r; | |
2261 | } | |
2262 | ||
2263 | return 0; | |
2264 | } | |
2265 | ||
2266 | static int object_added_append_all(sd_bus *bus, sd_bus_message *m, const char *path) { | |
2267 | _cleanup_set_free_ Set *s = NULL; | |
2268 | char *prefix; | |
2269 | int r; | |
2270 | ||
2271 | assert(bus); | |
2272 | assert(m); | |
2273 | assert(path); | |
2274 | ||
2275 | /* | |
2276 | * This appends all interfaces registered on path @path. We first add | |
2277 | * the builtin interfaces, which are always available and handled by | |
2278 | * sd-bus. Then, we add all interfaces registered on the exact node, | |
2279 | * followed by all fallback interfaces registered on any parent prefix. | |
2280 | * | |
2281 | * If an interface is registered multiple times on the same node with | |
2282 | * different vtables, we merge all the properties across all vtables. | |
2283 | * However, if a child node has the same interface registered as one of | |
2284 | * its parent nodes has as fallback, we make the child overwrite the | |
2285 | * parent instead of extending it. Therefore, we keep a "Set" of all | |
2286 | * handled interfaces during parent traversal, so we skip interfaces on | |
2287 | * a parent that were overwritten by a child. | |
2288 | */ | |
2289 | ||
2290 | s = set_new(&string_hash_ops); | |
2291 | if (!s) | |
2292 | return -ENOMEM; | |
2293 | ||
2294 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Peer", 0); | |
2295 | if (r < 0) | |
2296 | return r; | |
2297 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Introspectable", 0); | |
2298 | if (r < 0) | |
2299 | return r; | |
2300 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Properties", 0); | |
2301 | if (r < 0) | |
2302 | return r; | |
2303 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.ObjectManager", 0); | |
2304 | if (r < 0) | |
2305 | return r; | |
2306 | ||
2307 | r = object_added_append_all_prefix(bus, m, s, path, path, false); | |
2308 | if (r < 0) | |
2309 | return r; | |
2310 | if (bus->nodes_modified) | |
2311 | return 0; | |
2312 | ||
2313 | prefix = alloca(strlen(path) + 1); | |
2314 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2315 | r = object_added_append_all_prefix(bus, m, s, prefix, path, true); | |
2316 | if (r < 0) | |
2317 | return r; | |
2318 | if (bus->nodes_modified) | |
2319 | return 0; | |
2320 | } | |
2321 | ||
2322 | return 0; | |
2323 | } | |
2324 | ||
969a9685 | 2325 | _public_ int sd_bus_emit_object_added(sd_bus *bus, const char *path) { |
d95eb43e DH |
2326 | BUS_DONT_DESTROY(bus); |
2327 | ||
4afd3348 | 2328 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2329 | struct node *object_manager; |
d95eb43e DH |
2330 | int r; |
2331 | ||
2332 | /* | |
2333 | * This emits an InterfacesAdded signal on the given path, by iterating | |
2334 | * all registered vtables and fallback vtables on the path. All | |
2335 | * properties are queried and included in the signal. | |
2336 | * This call is equivalent to sd_bus_emit_interfaces_added() with an | |
2337 | * explicit list of registered interfaces. However, unlike | |
2338 | * interfaces_added(), this call can figure out the list of supported | |
2339 | * interfaces itself. Furthermore, it properly adds the builtin | |
2340 | * org.freedesktop.DBus.* interfaces. | |
2341 | */ | |
2342 | ||
2343 | assert_return(bus, -EINVAL); | |
2344 | assert_return(object_path_is_valid(path), -EINVAL); | |
2345 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2346 | ||
2347 | if (!BUS_IS_OPEN(bus->state)) | |
2348 | return -ENOTCONN; | |
2349 | ||
2d5c8a27 DH |
2350 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2351 | if (r < 0) | |
2352 | return r; | |
2353 | if (r == 0) | |
2354 | return -ESRCH; | |
2355 | ||
d95eb43e DH |
2356 | do { |
2357 | bus->nodes_modified = false; | |
2358 | m = sd_bus_message_unref(m); | |
2359 | ||
2d5c8a27 | 2360 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded"); |
d95eb43e DH |
2361 | if (r < 0) |
2362 | return r; | |
2363 | ||
2364 | r = sd_bus_message_append_basic(m, 'o', path); | |
2365 | if (r < 0) | |
2366 | return r; | |
2367 | ||
2368 | r = sd_bus_message_open_container(m, 'a', "{sa{sv}}"); | |
2369 | if (r < 0) | |
2370 | return r; | |
2371 | ||
2372 | r = object_added_append_all(bus, m, path); | |
2373 | if (r < 0) | |
2374 | return r; | |
2375 | ||
2376 | if (bus->nodes_modified) | |
2377 | continue; | |
2378 | ||
2379 | r = sd_bus_message_close_container(m); | |
2380 | if (r < 0) | |
2381 | return r; | |
2382 | ||
2383 | } while (bus->nodes_modified); | |
2384 | ||
2385 | return sd_bus_send(bus, m, NULL); | |
2386 | } | |
2387 | ||
2388 | static int object_removed_append_all_prefix( | |
2389 | sd_bus *bus, | |
2390 | sd_bus_message *m, | |
2391 | Set *s, | |
2392 | const char *prefix, | |
2393 | const char *path, | |
2394 | bool require_fallback) { | |
2395 | ||
2396 | const char *previous_interface = NULL; | |
2397 | struct node_vtable *c; | |
2398 | struct node *n; | |
2399 | int r; | |
2400 | ||
2401 | assert(bus); | |
2402 | assert(m); | |
2403 | assert(s); | |
2404 | assert(prefix); | |
2405 | assert(path); | |
2406 | ||
2407 | n = hashmap_get(bus->nodes, prefix); | |
2408 | if (!n) | |
2409 | return 0; | |
2410 | ||
2411 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 2412 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
d95eb43e DH |
2413 | void *u = NULL; |
2414 | ||
2415 | if (require_fallback && !c->is_fallback) | |
2416 | continue; | |
2417 | if (streq_ptr(c->interface, previous_interface)) | |
2418 | continue; | |
2419 | ||
2420 | /* If a child-node already handled this interface, we | |
2421 | * skip it on any of its parents. The child vtables | |
2422 | * always fully override any conflicting vtables of | |
2423 | * any parent node. */ | |
2424 | if (set_get(s, c->interface)) | |
2425 | continue; | |
2426 | ||
2427 | r = node_vtable_get_userdata(bus, path, c, &u, &error); | |
2428 | if (r < 0) | |
2429 | return r; | |
2430 | if (bus->nodes_modified) | |
2431 | return 0; | |
2432 | if (r == 0) | |
2433 | continue; | |
2434 | ||
2435 | r = set_put(s, c->interface); | |
2436 | if (r < 0) | |
2437 | return r; | |
2438 | ||
2439 | r = sd_bus_message_append(m, "s", c->interface); | |
2440 | if (r < 0) | |
2441 | return r; | |
2442 | ||
2443 | previous_interface = c->interface; | |
2444 | } | |
2445 | ||
2446 | return 0; | |
2447 | } | |
2448 | ||
2449 | static int object_removed_append_all(sd_bus *bus, sd_bus_message *m, const char *path) { | |
2450 | _cleanup_set_free_ Set *s = NULL; | |
2451 | char *prefix; | |
2452 | int r; | |
2453 | ||
2454 | assert(bus); | |
2455 | assert(m); | |
2456 | assert(path); | |
2457 | ||
2458 | /* see sd_bus_emit_object_added() for details */ | |
2459 | ||
2460 | s = set_new(&string_hash_ops); | |
2461 | if (!s) | |
2462 | return -ENOMEM; | |
2463 | ||
2464 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Peer"); | |
2465 | if (r < 0) | |
2466 | return r; | |
2467 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Introspectable"); | |
2468 | if (r < 0) | |
2469 | return r; | |
2470 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Properties"); | |
2471 | if (r < 0) | |
2472 | return r; | |
2473 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.ObjectManager"); | |
2474 | if (r < 0) | |
2475 | return r; | |
2476 | ||
2477 | r = object_removed_append_all_prefix(bus, m, s, path, path, false); | |
2478 | if (r < 0) | |
2479 | return r; | |
2480 | if (bus->nodes_modified) | |
2481 | return 0; | |
2482 | ||
2483 | prefix = alloca(strlen(path) + 1); | |
2484 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2485 | r = object_removed_append_all_prefix(bus, m, s, prefix, path, true); | |
2486 | if (r < 0) | |
2487 | return r; | |
2488 | if (bus->nodes_modified) | |
2489 | return 0; | |
2490 | } | |
2491 | ||
2492 | return 0; | |
2493 | } | |
2494 | ||
969a9685 | 2495 | _public_ int sd_bus_emit_object_removed(sd_bus *bus, const char *path) { |
d95eb43e DH |
2496 | BUS_DONT_DESTROY(bus); |
2497 | ||
4afd3348 | 2498 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2499 | struct node *object_manager; |
d95eb43e DH |
2500 | int r; |
2501 | ||
2502 | /* | |
2503 | * This is like sd_bus_emit_object_added(), but emits an | |
2504 | * InterfacesRemoved signal on the given path. This only includes any | |
2505 | * registered interfaces but skips the properties. Note that this will | |
2506 | * call into the find() callbacks of any registered vtable. Therefore, | |
2507 | * you must call this function before destroying/unlinking your object. | |
2508 | * Otherwise, the list of interfaces will be incomplete. However, note | |
2509 | * that this will *NOT* call into any property callback. Therefore, the | |
2510 | * object might be in an "destructed" state, as long as we can find it. | |
2511 | */ | |
2512 | ||
2513 | assert_return(bus, -EINVAL); | |
2514 | assert_return(object_path_is_valid(path), -EINVAL); | |
2515 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2516 | ||
2517 | if (!BUS_IS_OPEN(bus->state)) | |
2518 | return -ENOTCONN; | |
2519 | ||
2d5c8a27 DH |
2520 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2521 | if (r < 0) | |
2522 | return r; | |
2523 | if (r == 0) | |
2524 | return -ESRCH; | |
2525 | ||
d95eb43e DH |
2526 | do { |
2527 | bus->nodes_modified = false; | |
2528 | m = sd_bus_message_unref(m); | |
2529 | ||
2d5c8a27 | 2530 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved"); |
d95eb43e DH |
2531 | if (r < 0) |
2532 | return r; | |
2533 | ||
2534 | r = sd_bus_message_append_basic(m, 'o', path); | |
2535 | if (r < 0) | |
2536 | return r; | |
2537 | ||
2538 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2539 | if (r < 0) | |
2540 | return r; | |
2541 | ||
2542 | r = object_removed_append_all(bus, m, path); | |
2543 | if (r < 0) | |
2544 | return r; | |
2545 | ||
2546 | if (bus->nodes_modified) | |
2547 | continue; | |
2548 | ||
2549 | r = sd_bus_message_close_container(m); | |
2550 | if (r < 0) | |
2551 | return r; | |
2552 | ||
2553 | } while (bus->nodes_modified); | |
2554 | ||
2555 | return sd_bus_send(bus, m, NULL); | |
2556 | } | |
2557 | ||
4be39163 LP |
2558 | static int interfaces_added_append_one_prefix( |
2559 | sd_bus *bus, | |
2560 | sd_bus_message *m, | |
2561 | const char *prefix, | |
2562 | const char *path, | |
2563 | const char *interface, | |
2564 | bool require_fallback) { | |
2565 | ||
4afd3348 | 2566 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
718db961 | 2567 | bool found_interface = false; |
4be39163 LP |
2568 | struct node_vtable *c; |
2569 | struct node *n; | |
2570 | void *u = NULL; | |
2571 | int r; | |
2572 | ||
2573 | assert(bus); | |
2574 | assert(m); | |
2575 | assert(prefix); | |
2576 | assert(path); | |
2577 | assert(interface); | |
2578 | ||
2579 | n = hashmap_get(bus->nodes, prefix); | |
2580 | if (!n) | |
2581 | return 0; | |
2582 | ||
2583 | LIST_FOREACH(vtables, c, n->vtables) { | |
2584 | if (require_fallback && !c->is_fallback) | |
2585 | continue; | |
2586 | ||
718db961 LP |
2587 | if (!streq(c->interface, interface)) |
2588 | continue; | |
4be39163 | 2589 | |
f00c3121 | 2590 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
718db961 LP |
2591 | if (r < 0) |
2592 | return r; | |
2593 | if (bus->nodes_modified) | |
2594 | return 0; | |
2595 | if (r == 0) | |
2596 | continue; | |
4be39163 | 2597 | |
718db961 LP |
2598 | if (!found_interface) { |
2599 | r = sd_bus_message_append_basic(m, 's', interface); | |
2600 | if (r < 0) | |
2601 | return r; | |
4be39163 | 2602 | |
718db961 LP |
2603 | r = sd_bus_message_open_container(m, 'a', "{sv}"); |
2604 | if (r < 0) | |
2605 | return r; | |
4be39163 | 2606 | |
718db961 LP |
2607 | found_interface = true; |
2608 | } | |
4be39163 | 2609 | |
718db961 LP |
2610 | r = vtable_append_all_properties(bus, m, path, c, u, &error); |
2611 | if (r < 0) | |
2612 | return r; | |
2613 | if (bus->nodes_modified) | |
2614 | return 0; | |
2615 | } | |
4be39163 | 2616 | |
718db961 LP |
2617 | if (found_interface) { |
2618 | r = sd_bus_message_close_container(m); | |
2619 | if (r < 0) | |
2620 | return r; | |
2621 | } | |
4be39163 | 2622 | |
718db961 | 2623 | return found_interface; |
4be39163 LP |
2624 | } |
2625 | ||
2626 | static int interfaces_added_append_one( | |
2627 | sd_bus *bus, | |
2628 | sd_bus_message *m, | |
2629 | const char *path, | |
2630 | const char *interface) { | |
2631 | ||
2632 | char *prefix; | |
2633 | int r; | |
2634 | ||
2635 | assert(bus); | |
2636 | assert(m); | |
2637 | assert(path); | |
2638 | assert(interface); | |
2639 | ||
2640 | r = interfaces_added_append_one_prefix(bus, m, path, path, interface, false); | |
2641 | if (r != 0) | |
2642 | return r; | |
68313d3d LP |
2643 | if (bus->nodes_modified) |
2644 | return 0; | |
4be39163 LP |
2645 | |
2646 | prefix = alloca(strlen(path) + 1); | |
2647 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2648 | r = interfaces_added_append_one_prefix(bus, m, prefix, path, interface, true); | |
2649 | if (r != 0) | |
2650 | return r; | |
68313d3d LP |
2651 | if (bus->nodes_modified) |
2652 | return 0; | |
4be39163 LP |
2653 | } |
2654 | ||
2655 | return -ENOENT; | |
992c052c LP |
2656 | } |
2657 | ||
d9f644e2 | 2658 | _public_ int sd_bus_emit_interfaces_added_strv(sd_bus *bus, const char *path, char **interfaces) { |
8ce2afd6 LP |
2659 | BUS_DONT_DESTROY(bus); |
2660 | ||
4afd3348 | 2661 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2662 | struct node *object_manager; |
4be39163 LP |
2663 | char **i; |
2664 | int r; | |
2665 | ||
2666 | assert_return(bus, -EINVAL); | |
2667 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2668 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2669 | ||
a3d59cd1 LP |
2670 | if (!BUS_IS_OPEN(bus->state)) |
2671 | return -ENOTCONN; | |
2672 | ||
4be39163 LP |
2673 | if (strv_isempty(interfaces)) |
2674 | return 0; | |
2675 | ||
2d5c8a27 DH |
2676 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2677 | if (r < 0) | |
2678 | return r; | |
2679 | if (r == 0) | |
2680 | return -ESRCH; | |
2681 | ||
68313d3d LP |
2682 | do { |
2683 | bus->nodes_modified = false; | |
1b02f301 | 2684 | m = sd_bus_message_unref(m); |
4be39163 | 2685 | |
2d5c8a27 | 2686 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded"); |
68313d3d LP |
2687 | if (r < 0) |
2688 | return r; | |
4be39163 | 2689 | |
68313d3d | 2690 | r = sd_bus_message_append_basic(m, 'o', path); |
4be39163 LP |
2691 | if (r < 0) |
2692 | return r; | |
2693 | ||
68313d3d | 2694 | r = sd_bus_message_open_container(m, 'a', "{sa{sv}}"); |
4be39163 LP |
2695 | if (r < 0) |
2696 | return r; | |
2697 | ||
68313d3d LP |
2698 | STRV_FOREACH(i, interfaces) { |
2699 | assert_return(interface_name_is_valid(*i), -EINVAL); | |
2700 | ||
2701 | r = sd_bus_message_open_container(m, 'e', "sa{sv}"); | |
2702 | if (r < 0) | |
2703 | return r; | |
2704 | ||
2705 | r = interfaces_added_append_one(bus, m, path, *i); | |
2706 | if (r < 0) | |
2707 | return r; | |
2708 | ||
2709 | if (bus->nodes_modified) | |
2710 | break; | |
2711 | ||
2712 | r = sd_bus_message_close_container(m); | |
2713 | if (r < 0) | |
2714 | return r; | |
2715 | } | |
2716 | ||
2717 | if (bus->nodes_modified) | |
2718 | continue; | |
2719 | ||
4be39163 LP |
2720 | r = sd_bus_message_close_container(m); |
2721 | if (r < 0) | |
2722 | return r; | |
4be39163 | 2723 | |
68313d3d | 2724 | } while (bus->nodes_modified); |
4be39163 LP |
2725 | |
2726 | return sd_bus_send(bus, m, NULL); | |
2727 | } | |
2728 | ||
d9f644e2 | 2729 | _public_ int sd_bus_emit_interfaces_added(sd_bus *bus, const char *path, const char *interface, ...) { |
250a918d | 2730 | char **interfaces; |
4be39163 LP |
2731 | |
2732 | assert_return(bus, -EINVAL); | |
2733 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2734 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2735 | ||
a3d59cd1 LP |
2736 | if (!BUS_IS_OPEN(bus->state)) |
2737 | return -ENOTCONN; | |
2738 | ||
250a918d | 2739 | interfaces = strv_from_stdarg_alloca(interface); |
4be39163 LP |
2740 | |
2741 | return sd_bus_emit_interfaces_added_strv(bus, path, interfaces); | |
2742 | } | |
2743 | ||
d9f644e2 | 2744 | _public_ int sd_bus_emit_interfaces_removed_strv(sd_bus *bus, const char *path, char **interfaces) { |
4afd3348 | 2745 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2746 | struct node *object_manager; |
4be39163 LP |
2747 | int r; |
2748 | ||
2749 | assert_return(bus, -EINVAL); | |
2750 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2751 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2752 | ||
a3d59cd1 LP |
2753 | if (!BUS_IS_OPEN(bus->state)) |
2754 | return -ENOTCONN; | |
2755 | ||
4be39163 LP |
2756 | if (strv_isempty(interfaces)) |
2757 | return 0; | |
2758 | ||
2d5c8a27 DH |
2759 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2760 | if (r < 0) | |
2761 | return r; | |
2762 | if (r == 0) | |
2763 | return -ESRCH; | |
2764 | ||
2765 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved"); | |
4be39163 LP |
2766 | if (r < 0) |
2767 | return r; | |
2768 | ||
2769 | r = sd_bus_message_append_basic(m, 'o', path); | |
2770 | if (r < 0) | |
2771 | return r; | |
2772 | ||
2773 | r = sd_bus_message_append_strv(m, interfaces); | |
2774 | if (r < 0) | |
2775 | return r; | |
2776 | ||
2777 | return sd_bus_send(bus, m, NULL); | |
2778 | } | |
2779 | ||
d9f644e2 | 2780 | _public_ int sd_bus_emit_interfaces_removed(sd_bus *bus, const char *path, const char *interface, ...) { |
250a918d | 2781 | char **interfaces; |
4be39163 LP |
2782 | |
2783 | assert_return(bus, -EINVAL); | |
2784 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2785 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2786 | ||
a3d59cd1 LP |
2787 | if (!BUS_IS_OPEN(bus->state)) |
2788 | return -ENOTCONN; | |
2789 | ||
250a918d | 2790 | interfaces = strv_from_stdarg_alloca(interface); |
4be39163 LP |
2791 | |
2792 | return sd_bus_emit_interfaces_removed_strv(bus, path, interfaces); | |
992c052c LP |
2793 | } |
2794 | ||
19befb2d LP |
2795 | _public_ int sd_bus_add_object_manager(sd_bus *bus, sd_bus_slot **slot, const char *path) { |
2796 | sd_bus_slot *s; | |
992c052c | 2797 | struct node *n; |
19befb2d | 2798 | int r; |
992c052c | 2799 | |
dfa92725 LP |
2800 | assert_return(bus, -EINVAL); |
2801 | assert_return(object_path_is_valid(path), -EINVAL); | |
2802 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c LP |
2803 | |
2804 | n = bus_node_allocate(bus, path); | |
2805 | if (!n) | |
2806 | return -ENOMEM; | |
2807 | ||
19befb2d LP |
2808 | s = bus_slot_allocate(bus, !slot, BUS_NODE_OBJECT_MANAGER, sizeof(struct node_object_manager), NULL); |
2809 | if (!s) { | |
2810 | r = -ENOMEM; | |
2811 | goto fail; | |
2812 | } | |
992c052c | 2813 | |
19befb2d LP |
2814 | s->node_object_manager.node = n; |
2815 | LIST_PREPEND(object_managers, n->object_managers, &s->node_object_manager); | |
2816 | bus->nodes_modified = true; | |
992c052c | 2817 | |
19befb2d LP |
2818 | if (slot) |
2819 | *slot = s; | |
992c052c | 2820 | |
19befb2d | 2821 | return 0; |
992c052c | 2822 | |
19befb2d LP |
2823 | fail: |
2824 | sd_bus_slot_unref(s); | |
992c052c | 2825 | bus_node_gc(bus, n); |
dfa92725 | 2826 | |
19befb2d | 2827 | return r; |
992c052c | 2828 | } |