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992c052c LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
992c052c | 22 | #include "bus-internal.h" |
07630cea | 23 | #include "bus-introspect.h" |
992c052c | 24 | #include "bus-message.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" | |
19befb2d | 32 | #include "bus-objects.h" |
992c052c LP |
33 | |
34 | static int node_vtable_get_userdata( | |
35 | sd_bus *bus, | |
36 | const char *path, | |
37 | struct node_vtable *c, | |
f00c3121 LP |
38 | void **userdata, |
39 | sd_bus_error *error) { | |
992c052c | 40 | |
19befb2d | 41 | sd_bus_slot *s; |
992c052c LP |
42 | void *u; |
43 | int r; | |
44 | ||
45 | assert(bus); | |
46 | assert(path); | |
47 | assert(c); | |
48 | ||
19befb2d LP |
49 | s = container_of(c, sd_bus_slot, node_vtable); |
50 | u = s->userdata; | |
992c052c | 51 | if (c->find) { |
1b64f838 | 52 | bus->current_slot = sd_bus_slot_ref(s); |
caa82984 | 53 | bus->current_userdata = u; |
f00c3121 | 54 | r = c->find(bus, path, c->interface, u, &u, error); |
caa82984 | 55 | bus->current_userdata = NULL; |
1b64f838 | 56 | bus->current_slot = sd_bus_slot_unref(s); |
19befb2d | 57 | |
f00c3121 LP |
58 | if (r < 0) |
59 | return r; | |
60 | if (sd_bus_error_is_set(error)) | |
5958d089 | 61 | return -sd_bus_error_get_errno(error); |
f00c3121 | 62 | if (r == 0) |
992c052c LP |
63 | return r; |
64 | } | |
65 | ||
66 | if (userdata) | |
67 | *userdata = u; | |
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 | ||
5d66866d | 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) { | |
ebcf1f97 | 274 | _cleanup_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 | |
341 | cap --; | |
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 | ||
f00c3121 | 359 | _cleanup_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 | ||
992c052c | 582 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
ebcf1f97 | 583 | _cleanup_bus_message_unref_ 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 | ||
783 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
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 LP |
805 | LIST_FOREACH(vtables, c, first) { |
806 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
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 | ||
833 | if (!found_interface) { | |
834 | r = sd_bus_reply_method_errorf( | |
df2d202e | 835 | m, |
40ca29a1 | 836 | SD_BUS_ERROR_UNKNOWN_INTERFACE, |
992c052c LP |
837 | "Unknown interface '%s'.", iface); |
838 | if (r < 0) | |
839 | return r; | |
840 | ||
841 | return 1; | |
842 | } | |
843 | ||
844 | r = sd_bus_message_close_container(reply); | |
845 | if (r < 0) | |
846 | return r; | |
847 | ||
848 | r = sd_bus_send(bus, reply, NULL); | |
849 | if (r < 0) | |
850 | return r; | |
851 | ||
852 | return 1; | |
853 | } | |
854 | ||
ff02f101 | 855 | static int bus_node_exists( |
dfa92725 LP |
856 | sd_bus *bus, |
857 | struct node *n, | |
858 | const char *path, | |
859 | bool require_fallback) { | |
860 | ||
992c052c LP |
861 | struct node_vtable *c; |
862 | struct node_callback *k; | |
ff02f101 | 863 | int r; |
992c052c LP |
864 | |
865 | assert(bus); | |
866 | assert(n); | |
dfa92725 | 867 | assert(path); |
992c052c LP |
868 | |
869 | /* Tests if there's anything attached directly to this node | |
870 | * for the specified path */ | |
871 | ||
ff02f101 DH |
872 | if (!require_fallback && (n->enumerators || n->object_managers)) |
873 | return true; | |
874 | ||
992c052c LP |
875 | LIST_FOREACH(callbacks, k, n->callbacks) { |
876 | if (require_fallback && !k->is_fallback) | |
877 | continue; | |
878 | ||
ff02f101 | 879 | return 1; |
992c052c LP |
880 | } |
881 | ||
882 | LIST_FOREACH(vtables, c, n->vtables) { | |
f00c3121 | 883 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
884 | |
885 | if (require_fallback && !c->is_fallback) | |
886 | continue; | |
887 | ||
ff02f101 DH |
888 | r = node_vtable_get_userdata(bus, path, c, NULL, &error); |
889 | if (r != 0) | |
890 | return r; | |
68313d3d | 891 | if (bus->nodes_modified) |
ff02f101 | 892 | return 0; |
992c052c LP |
893 | } |
894 | ||
ff02f101 | 895 | return 0; |
992c052c LP |
896 | } |
897 | ||
898 | static int process_introspect( | |
899 | sd_bus *bus, | |
900 | sd_bus_message *m, | |
901 | struct node *n, | |
902 | bool require_fallback, | |
903 | bool *found_object) { | |
904 | ||
f00c3121 | 905 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
906 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; |
907 | _cleanup_set_free_free_ Set *s = NULL; | |
718db961 | 908 | const char *previous_interface = NULL; |
992c052c LP |
909 | struct introspect intro; |
910 | struct node_vtable *c; | |
911 | bool empty; | |
912 | int r; | |
913 | ||
914 | assert(bus); | |
915 | assert(m); | |
916 | assert(n); | |
917 | assert(found_object); | |
918 | ||
44eb1add | 919 | r = get_child_nodes(bus, m->path, n, 0, &s, &error); |
992c052c | 920 | if (r < 0) |
f00c3121 | 921 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
922 | if (bus->nodes_modified) |
923 | return 0; | |
992c052c | 924 | |
7fb411f0 | 925 | r = introspect_begin(&intro, bus->trusted); |
992c052c LP |
926 | if (r < 0) |
927 | return r; | |
928 | ||
943c3f94 | 929 | r = introspect_write_default_interfaces(&intro, !require_fallback && n->object_managers); |
992c052c LP |
930 | if (r < 0) |
931 | return r; | |
932 | ||
933 | empty = set_isempty(s); | |
934 | ||
935 | LIST_FOREACH(vtables, c, n->vtables) { | |
936 | if (require_fallback && !c->is_fallback) | |
937 | continue; | |
938 | ||
f00c3121 LP |
939 | r = node_vtable_get_userdata(bus, m->path, c, NULL, &error); |
940 | if (r < 0) { | |
941 | r = bus_maybe_reply_error(m, r, &error); | |
942 | goto finish; | |
943 | } | |
944 | if (bus->nodes_modified) { | |
945 | r = 0; | |
946 | goto finish; | |
947 | } | |
992c052c LP |
948 | if (r == 0) |
949 | continue; | |
950 | ||
951 | empty = false; | |
952 | ||
6e8df5f0 LP |
953 | if (c->vtable[0].flags & SD_BUS_VTABLE_HIDDEN) |
954 | continue; | |
955 | ||
718db961 LP |
956 | if (!streq_ptr(previous_interface, c->interface)) { |
957 | ||
958 | if (previous_interface) | |
959 | fputs(" </interface>\n", intro.f); | |
960 | ||
961 | fprintf(intro.f, " <interface name=\"%s\">\n", c->interface); | |
962 | } | |
963 | ||
964 | r = introspect_write_interface(&intro, c->vtable); | |
992c052c LP |
965 | if (r < 0) |
966 | goto finish; | |
718db961 LP |
967 | |
968 | previous_interface = c->interface; | |
992c052c LP |
969 | } |
970 | ||
718db961 LP |
971 | if (previous_interface) |
972 | fputs(" </interface>\n", intro.f); | |
973 | ||
992c052c LP |
974 | if (empty) { |
975 | /* Nothing?, let's see if we exist at all, and if not | |
976 | * refuse to do anything */ | |
977 | r = bus_node_exists(bus, n, m->path, require_fallback); | |
ff02f101 DH |
978 | if (r <= 0) |
979 | goto finish; | |
980 | if (bus->nodes_modified) { | |
981 | r = 0; | |
992c052c | 982 | goto finish; |
ff02f101 | 983 | } |
992c052c LP |
984 | } |
985 | ||
986 | *found_object = true; | |
987 | ||
988 | r = introspect_write_child_nodes(&intro, s, m->path); | |
989 | if (r < 0) | |
990 | goto finish; | |
991 | ||
992 | r = introspect_finish(&intro, bus, m, &reply); | |
993 | if (r < 0) | |
994 | goto finish; | |
995 | ||
996 | r = sd_bus_send(bus, reply, NULL); | |
997 | if (r < 0) | |
998 | goto finish; | |
999 | ||
1000 | r = 1; | |
1001 | ||
1002 | finish: | |
1003 | introspect_free(&intro); | |
1004 | return r; | |
1005 | } | |
1006 | ||
992c052c LP |
1007 | static int object_manager_serialize_path( |
1008 | sd_bus *bus, | |
1009 | sd_bus_message *reply, | |
1010 | const char *prefix, | |
1011 | const char *path, | |
1012 | bool require_fallback, | |
1013 | sd_bus_error *error) { | |
1014 | ||
718db961 LP |
1015 | const char *previous_interface = NULL; |
1016 | bool found_something = false; | |
992c052c LP |
1017 | struct node_vtable *i; |
1018 | struct node *n; | |
1019 | int r; | |
1020 | ||
1021 | assert(bus); | |
1022 | assert(reply); | |
1023 | assert(prefix); | |
1024 | assert(path); | |
1025 | assert(error); | |
1026 | ||
1027 | n = hashmap_get(bus->nodes, prefix); | |
1028 | if (!n) | |
1029 | return 0; | |
1030 | ||
992c052c | 1031 | LIST_FOREACH(vtables, i, n->vtables) { |
92db139e | 1032 | void *u; |
992c052c LP |
1033 | |
1034 | if (require_fallback && !i->is_fallback) | |
1035 | continue; | |
1036 | ||
f00c3121 | 1037 | r = node_vtable_get_userdata(bus, path, i, &u, error); |
92db139e LP |
1038 | if (r < 0) |
1039 | return r; | |
68313d3d LP |
1040 | if (bus->nodes_modified) |
1041 | return 0; | |
92db139e LP |
1042 | if (r == 0) |
1043 | continue; | |
1044 | ||
1045 | if (!found_something) { | |
718db961 LP |
1046 | |
1047 | /* Open the object part */ | |
1048 | ||
92db139e LP |
1049 | r = sd_bus_message_open_container(reply, 'e', "oa{sa{sv}}"); |
1050 | if (r < 0) | |
1051 | return r; | |
1052 | ||
1053 | r = sd_bus_message_append(reply, "o", path); | |
1054 | if (r < 0) | |
1055 | return r; | |
1056 | ||
1057 | r = sd_bus_message_open_container(reply, 'a', "{sa{sv}}"); | |
1058 | if (r < 0) | |
1059 | return r; | |
1060 | ||
1061 | found_something = true; | |
1062 | } | |
1063 | ||
718db961 LP |
1064 | if (!streq_ptr(previous_interface, i->interface)) { |
1065 | ||
1066 | /* Maybe close the previous interface part */ | |
1067 | ||
1068 | if (previous_interface) { | |
1069 | r = sd_bus_message_close_container(reply); | |
1070 | if (r < 0) | |
1071 | return r; | |
1072 | ||
1073 | r = sd_bus_message_close_container(reply); | |
1074 | if (r < 0) | |
1075 | return r; | |
1076 | } | |
1077 | ||
1078 | /* Open the new interface part */ | |
1079 | ||
1080 | r = sd_bus_message_open_container(reply, 'e', "sa{sv}"); | |
1081 | if (r < 0) | |
1082 | return r; | |
1083 | ||
1084 | r = sd_bus_message_append(reply, "s", i->interface); | |
1085 | if (r < 0) | |
1086 | return r; | |
1087 | ||
1088 | r = sd_bus_message_open_container(reply, 'a', "{sv}"); | |
1089 | if (r < 0) | |
1090 | return r; | |
1091 | } | |
1092 | ||
1093 | r = vtable_append_all_properties(bus, reply, path, i, u, error); | |
992c052c LP |
1094 | if (r < 0) |
1095 | return r; | |
68313d3d LP |
1096 | if (bus->nodes_modified) |
1097 | return 0; | |
718db961 LP |
1098 | |
1099 | previous_interface = i->interface; | |
1100 | } | |
1101 | ||
1102 | if (previous_interface) { | |
1103 | r = sd_bus_message_close_container(reply); | |
1104 | if (r < 0) | |
1105 | return r; | |
1106 | ||
1107 | r = sd_bus_message_close_container(reply); | |
1108 | if (r < 0) | |
1109 | return r; | |
992c052c LP |
1110 | } |
1111 | ||
92db139e LP |
1112 | if (found_something) { |
1113 | r = sd_bus_message_close_container(reply); | |
1114 | if (r < 0) | |
1115 | return r; | |
992c052c | 1116 | |
92db139e LP |
1117 | r = sd_bus_message_close_container(reply); |
1118 | if (r < 0) | |
1119 | return r; | |
1120 | } | |
992c052c LP |
1121 | |
1122 | return 1; | |
1123 | } | |
1124 | ||
1125 | static int object_manager_serialize_path_and_fallbacks( | |
1126 | sd_bus *bus, | |
1127 | sd_bus_message *reply, | |
1128 | const char *path, | |
1129 | sd_bus_error *error) { | |
1130 | ||
92e189e5 | 1131 | char *prefix; |
992c052c LP |
1132 | int r; |
1133 | ||
1134 | assert(bus); | |
1135 | assert(reply); | |
1136 | assert(path); | |
1137 | assert(error); | |
1138 | ||
1139 | /* First, add all vtables registered for this path */ | |
1140 | r = object_manager_serialize_path(bus, reply, path, path, false, error); | |
1141 | if (r < 0) | |
1142 | return r; | |
68313d3d LP |
1143 | if (bus->nodes_modified) |
1144 | return 0; | |
992c052c LP |
1145 | |
1146 | /* Second, add fallback vtables registered for any of the prefixes */ | |
92e189e5 LP |
1147 | prefix = alloca(strlen(path) + 1); |
1148 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
1149 | r = object_manager_serialize_path(bus, reply, prefix, path, true, error); | |
1150 | if (r < 0) | |
1151 | return r; | |
68313d3d LP |
1152 | if (bus->nodes_modified) |
1153 | return 0; | |
992c052c LP |
1154 | } |
1155 | ||
1156 | return 0; | |
1157 | } | |
1158 | ||
1159 | static int process_get_managed_objects( | |
1160 | sd_bus *bus, | |
1161 | sd_bus_message *m, | |
1162 | struct node *n, | |
1163 | bool require_fallback, | |
1164 | bool *found_object) { | |
1165 | ||
f00c3121 | 1166 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
1167 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; |
1168 | _cleanup_set_free_free_ Set *s = NULL; | |
943c3f94 DH |
1169 | Iterator i; |
1170 | char *path; | |
992c052c LP |
1171 | int r; |
1172 | ||
1173 | assert(bus); | |
1174 | assert(m); | |
1175 | assert(n); | |
1176 | assert(found_object); | |
1177 | ||
943c3f94 DH |
1178 | /* Spec says, GetManagedObjects() is only implemented on the root of a |
1179 | * sub-tree. Therefore, we require a registered object-manager on | |
1180 | * exactly the queried path, otherwise, we refuse to respond. */ | |
1181 | ||
1182 | if (require_fallback || !n->object_managers) | |
992c052c LP |
1183 | return 0; |
1184 | ||
44eb1add | 1185 | r = get_child_nodes(bus, m->path, n, CHILDREN_RECURSIVE, &s, &error); |
992c052c LP |
1186 | if (r < 0) |
1187 | return r; | |
68313d3d LP |
1188 | if (bus->nodes_modified) |
1189 | return 0; | |
992c052c | 1190 | |
df2d202e | 1191 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
1192 | if (r < 0) |
1193 | return r; | |
1194 | ||
1195 | r = sd_bus_message_open_container(reply, 'a', "{oa{sa{sv}}}"); | |
1196 | if (r < 0) | |
1197 | return r; | |
1198 | ||
943c3f94 DH |
1199 | SET_FOREACH(path, s, i) { |
1200 | r = object_manager_serialize_path_and_fallbacks(bus, reply, path, &error); | |
1201 | if (r < 0) | |
1202 | return r; | |
992c052c | 1203 | |
943c3f94 | 1204 | if (bus->nodes_modified) |
992c052c | 1205 | return 0; |
992c052c LP |
1206 | } |
1207 | ||
1208 | r = sd_bus_message_close_container(reply); | |
1209 | if (r < 0) | |
1210 | return r; | |
1211 | ||
1212 | r = sd_bus_send(bus, reply, NULL); | |
1213 | if (r < 0) | |
1214 | return r; | |
1215 | ||
1216 | return 1; | |
1217 | } | |
1218 | ||
1219 | static int object_find_and_run( | |
1220 | sd_bus *bus, | |
1221 | sd_bus_message *m, | |
1222 | const char *p, | |
1223 | bool require_fallback, | |
1224 | bool *found_object) { | |
1225 | ||
1226 | struct node *n; | |
1227 | struct vtable_member vtable_key, *v; | |
1228 | int r; | |
1229 | ||
1230 | assert(bus); | |
1231 | assert(m); | |
1232 | assert(p); | |
1233 | assert(found_object); | |
1234 | ||
1235 | n = hashmap_get(bus->nodes, p); | |
1236 | if (!n) | |
1237 | return 0; | |
1238 | ||
1239 | /* First, try object callbacks */ | |
1240 | r = node_callbacks_run(bus, m, n->callbacks, require_fallback, found_object); | |
1241 | if (r != 0) | |
1242 | return r; | |
68313d3d LP |
1243 | if (bus->nodes_modified) |
1244 | return 0; | |
992c052c LP |
1245 | |
1246 | if (!m->interface || !m->member) | |
1247 | return 0; | |
1248 | ||
1249 | /* Then, look for a known method */ | |
1250 | vtable_key.path = (char*) p; | |
1251 | vtable_key.interface = m->interface; | |
1252 | vtable_key.member = m->member; | |
1253 | ||
1254 | v = hashmap_get(bus->vtable_methods, &vtable_key); | |
1255 | if (v) { | |
1256 | r = method_callbacks_run(bus, m, v, require_fallback, found_object); | |
1257 | if (r != 0) | |
1258 | return r; | |
68313d3d LP |
1259 | if (bus->nodes_modified) |
1260 | return 0; | |
992c052c LP |
1261 | } |
1262 | ||
1263 | /* Then, look for a known property */ | |
1264 | if (streq(m->interface, "org.freedesktop.DBus.Properties")) { | |
1265 | bool get = false; | |
1266 | ||
1267 | get = streq(m->member, "Get"); | |
1268 | ||
1269 | if (get || streq(m->member, "Set")) { | |
1270 | ||
1271 | r = sd_bus_message_rewind(m, true); | |
1272 | if (r < 0) | |
1273 | return r; | |
1274 | ||
1275 | vtable_key.path = (char*) p; | |
1276 | ||
1277 | r = sd_bus_message_read(m, "ss", &vtable_key.interface, &vtable_key.member); | |
1278 | if (r < 0) | |
0fc5ab90 | 1279 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface and member parameters"); |
992c052c LP |
1280 | |
1281 | v = hashmap_get(bus->vtable_properties, &vtable_key); | |
1282 | if (v) { | |
1283 | r = property_get_set_callbacks_run(bus, m, v, require_fallback, get, found_object); | |
1284 | if (r != 0) | |
1285 | return r; | |
1286 | } | |
1287 | ||
1288 | } else if (streq(m->member, "GetAll")) { | |
1289 | const char *iface; | |
1290 | ||
1291 | r = sd_bus_message_rewind(m, true); | |
1292 | if (r < 0) | |
1293 | return r; | |
1294 | ||
1295 | r = sd_bus_message_read(m, "s", &iface); | |
1296 | if (r < 0) | |
0fc5ab90 | 1297 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface parameter"); |
992c052c LP |
1298 | |
1299 | if (iface[0] == 0) | |
1300 | iface = NULL; | |
1301 | ||
1302 | r = property_get_all_callbacks_run(bus, m, n->vtables, require_fallback, iface, found_object); | |
1303 | if (r != 0) | |
1304 | return r; | |
1305 | } | |
1306 | ||
1307 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) { | |
1308 | ||
0fc5ab90 LP |
1309 | if (!isempty(sd_bus_message_get_signature(m, true))) |
1310 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
1311 | ||
992c052c LP |
1312 | r = process_introspect(bus, m, n, require_fallback, found_object); |
1313 | if (r != 0) | |
1314 | return r; | |
1315 | ||
1316 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.ObjectManager", "GetManagedObjects")) { | |
1317 | ||
0fc5ab90 LP |
1318 | if (!isempty(sd_bus_message_get_signature(m, true))) |
1319 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
1320 | ||
992c052c LP |
1321 | r = process_get_managed_objects(bus, m, n, require_fallback, found_object); |
1322 | if (r != 0) | |
1323 | return r; | |
1324 | } | |
1325 | ||
68313d3d LP |
1326 | if (bus->nodes_modified) |
1327 | return 0; | |
1328 | ||
992c052c LP |
1329 | if (!*found_object) { |
1330 | r = bus_node_exists(bus, n, m->path, require_fallback); | |
1331 | if (r < 0) | |
1332 | return r; | |
ff02f101 DH |
1333 | if (bus->nodes_modified) |
1334 | return 0; | |
992c052c LP |
1335 | if (r > 0) |
1336 | *found_object = true; | |
1337 | } | |
1338 | ||
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | int bus_process_object(sd_bus *bus, sd_bus_message *m) { | |
1343 | int r; | |
1344 | size_t pl; | |
1345 | bool found_object = false; | |
1346 | ||
1347 | assert(bus); | |
1348 | assert(m); | |
1349 | ||
09365592 LP |
1350 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1351 | return 0; | |
1352 | ||
40ca29a1 | 1353 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
992c052c LP |
1354 | return 0; |
1355 | ||
992c052c LP |
1356 | if (hashmap_isempty(bus->nodes)) |
1357 | return 0; | |
1358 | ||
f820cf99 LP |
1359 | /* Never respond to broadcast messages */ |
1360 | if (bus->bus_client && !m->destination) | |
1361 | return 0; | |
1362 | ||
adacb957 LP |
1363 | assert(m->path); |
1364 | assert(m->member); | |
1365 | ||
992c052c LP |
1366 | pl = strlen(m->path); |
1367 | do { | |
92e189e5 | 1368 | char prefix[pl+1]; |
992c052c LP |
1369 | |
1370 | bus->nodes_modified = false; | |
1371 | ||
1372 | r = object_find_and_run(bus, m, m->path, false, &found_object); | |
1373 | if (r != 0) | |
1374 | return r; | |
1375 | ||
1376 | /* Look for fallback prefixes */ | |
92e189e5 | 1377 | OBJECT_PATH_FOREACH_PREFIX(prefix, m->path) { |
992c052c LP |
1378 | |
1379 | if (bus->nodes_modified) | |
1380 | break; | |
1381 | ||
92e189e5 | 1382 | r = object_find_and_run(bus, m, prefix, true, &found_object); |
992c052c LP |
1383 | if (r != 0) |
1384 | return r; | |
1385 | } | |
1386 | ||
1387 | } while (bus->nodes_modified); | |
1388 | ||
1389 | if (!found_object) | |
1390 | return 0; | |
1391 | ||
1392 | if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Get") || | |
1393 | sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Set")) | |
1394 | r = sd_bus_reply_method_errorf( | |
df2d202e | 1395 | m, |
40ca29a1 | 1396 | SD_BUS_ERROR_UNKNOWN_PROPERTY, |
992c052c LP |
1397 | "Unknown property or interface."); |
1398 | else | |
1399 | r = sd_bus_reply_method_errorf( | |
df2d202e | 1400 | m, |
40ca29a1 | 1401 | SD_BUS_ERROR_UNKNOWN_METHOD, |
992c052c LP |
1402 | "Unknown method '%s' or interface '%s'.", m->member, m->interface); |
1403 | ||
1404 | if (r < 0) | |
1405 | return r; | |
1406 | ||
1407 | return 1; | |
1408 | } | |
1409 | ||
1410 | static struct node *bus_node_allocate(sd_bus *bus, const char *path) { | |
1411 | struct node *n, *parent; | |
1412 | const char *e; | |
2fd069b1 ZJS |
1413 | _cleanup_free_ char *s = NULL; |
1414 | char *p; | |
992c052c LP |
1415 | int r; |
1416 | ||
1417 | assert(bus); | |
1418 | assert(path); | |
1419 | assert(path[0] == '/'); | |
1420 | ||
1421 | n = hashmap_get(bus->nodes, path); | |
1422 | if (n) | |
1423 | return n; | |
1424 | ||
d5099efc | 1425 | r = hashmap_ensure_allocated(&bus->nodes, &string_hash_ops); |
992c052c LP |
1426 | if (r < 0) |
1427 | return NULL; | |
1428 | ||
1429 | s = strdup(path); | |
1430 | if (!s) | |
1431 | return NULL; | |
1432 | ||
1433 | if (streq(path, "/")) | |
1434 | parent = NULL; | |
1435 | else { | |
1436 | e = strrchr(path, '/'); | |
1437 | assert(e); | |
1438 | ||
7d67077f | 1439 | p = strndupa(path, MAX(1, e - path)); |
992c052c LP |
1440 | |
1441 | parent = bus_node_allocate(bus, p); | |
2fd069b1 | 1442 | if (!parent) |
992c052c | 1443 | return NULL; |
992c052c LP |
1444 | } |
1445 | ||
1446 | n = new0(struct node, 1); | |
1447 | if (!n) | |
1448 | return NULL; | |
1449 | ||
1450 | n->parent = parent; | |
1451 | n->path = s; | |
2fd069b1 | 1452 | s = NULL; /* do not free */ |
992c052c | 1453 | |
8e050193 | 1454 | r = hashmap_put(bus->nodes, n->path, n); |
992c052c | 1455 | if (r < 0) { |
2fd069b1 | 1456 | free(n->path); |
992c052c LP |
1457 | free(n); |
1458 | return NULL; | |
1459 | } | |
1460 | ||
1461 | if (parent) | |
71fda00f | 1462 | LIST_PREPEND(siblings, parent->child, n); |
992c052c LP |
1463 | |
1464 | return n; | |
1465 | } | |
1466 | ||
19befb2d | 1467 | void bus_node_gc(sd_bus *b, struct node *n) { |
992c052c LP |
1468 | assert(b); |
1469 | ||
1470 | if (!n) | |
1471 | return; | |
1472 | ||
1473 | if (n->child || | |
1474 | n->callbacks || | |
1475 | n->vtables || | |
1476 | n->enumerators || | |
19befb2d | 1477 | n->object_managers) |
992c052c LP |
1478 | return; |
1479 | ||
1480 | assert(hashmap_remove(b->nodes, n->path) == n); | |
1481 | ||
1482 | if (n->parent) | |
71fda00f | 1483 | LIST_REMOVE(siblings, n->parent->child, n); |
992c052c LP |
1484 | |
1485 | free(n->path); | |
1486 | bus_node_gc(b, n->parent); | |
1487 | free(n); | |
1488 | } | |
1489 | ||
2d5c8a27 DH |
1490 | static int bus_find_parent_object_manager(sd_bus *bus, struct node **out, const char *path) { |
1491 | struct node *n; | |
1492 | ||
1493 | assert(bus); | |
1494 | assert(path); | |
1495 | ||
1496 | n = hashmap_get(bus->nodes, path); | |
1497 | if (!n) { | |
1498 | char *prefix; | |
1499 | ||
1500 | prefix = alloca(strlen(path) + 1); | |
1501 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
1502 | n = hashmap_get(bus->nodes, prefix); | |
1503 | if (n) | |
1504 | break; | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | while (n && !n->object_managers) | |
1509 | n = n->parent; | |
1510 | ||
1511 | if (out) | |
1512 | *out = n; | |
1513 | return !!n; | |
1514 | } | |
1515 | ||
992c052c | 1516 | static int bus_add_object( |
dfa92725 | 1517 | sd_bus *bus, |
19befb2d | 1518 | sd_bus_slot **slot, |
992c052c LP |
1519 | bool fallback, |
1520 | const char *path, | |
1521 | sd_bus_message_handler_t callback, | |
1522 | void *userdata) { | |
1523 | ||
19befb2d | 1524 | sd_bus_slot *s; |
992c052c LP |
1525 | struct node *n; |
1526 | int r; | |
1527 | ||
dfa92725 LP |
1528 | assert_return(bus, -EINVAL); |
1529 | assert_return(object_path_is_valid(path), -EINVAL); | |
1530 | assert_return(callback, -EINVAL); | |
1531 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c | 1532 | |
dfa92725 | 1533 | n = bus_node_allocate(bus, path); |
992c052c LP |
1534 | if (!n) |
1535 | return -ENOMEM; | |
1536 | ||
19befb2d LP |
1537 | s = bus_slot_allocate(bus, !slot, BUS_NODE_CALLBACK, sizeof(struct node_callback), userdata); |
1538 | if (!s) { | |
992c052c LP |
1539 | r = -ENOMEM; |
1540 | goto fail; | |
1541 | } | |
1542 | ||
19befb2d LP |
1543 | s->node_callback.callback = callback; |
1544 | s->node_callback.is_fallback = fallback; | |
992c052c | 1545 | |
19befb2d LP |
1546 | s->node_callback.node = n; |
1547 | LIST_PREPEND(callbacks, n->callbacks, &s->node_callback); | |
68313d3d LP |
1548 | bus->nodes_modified = true; |
1549 | ||
19befb2d LP |
1550 | if (slot) |
1551 | *slot = s; | |
1552 | ||
992c052c LP |
1553 | return 0; |
1554 | ||
1555 | fail: | |
19befb2d | 1556 | sd_bus_slot_unref(s); |
dfa92725 | 1557 | bus_node_gc(bus, n); |
19befb2d | 1558 | |
992c052c LP |
1559 | return r; |
1560 | } | |
1561 | ||
19befb2d | 1562 | _public_ int sd_bus_add_object( |
992c052c | 1563 | sd_bus *bus, |
19befb2d | 1564 | sd_bus_slot **slot, |
992c052c LP |
1565 | const char *path, |
1566 | sd_bus_message_handler_t callback, | |
1567 | void *userdata) { | |
1568 | ||
19befb2d | 1569 | return bus_add_object(bus, slot, false, path, callback, userdata); |
992c052c LP |
1570 | } |
1571 | ||
19befb2d LP |
1572 | _public_ int sd_bus_add_fallback( |
1573 | sd_bus *bus, | |
1574 | sd_bus_slot **slot, | |
1575 | const char *prefix, | |
1576 | sd_bus_message_handler_t callback, | |
1577 | void *userdata) { | |
992c052c | 1578 | |
19befb2d | 1579 | return bus_add_object(bus, slot, true, prefix, callback, userdata); |
992c052c LP |
1580 | } |
1581 | ||
b826ab58 | 1582 | static void vtable_member_hash_func(const void *a, struct siphash *state) { |
992c052c LP |
1583 | const struct vtable_member *m = a; |
1584 | ||
dfa92725 LP |
1585 | assert(m); |
1586 | ||
b826ab58 TG |
1587 | string_hash_func(m->path, state); |
1588 | string_hash_func(m->interface, state); | |
1589 | string_hash_func(m->member, state); | |
992c052c LP |
1590 | } |
1591 | ||
1592 | static int vtable_member_compare_func(const void *a, const void *b) { | |
1593 | const struct vtable_member *x = a, *y = b; | |
1594 | int r; | |
1595 | ||
dfa92725 LP |
1596 | assert(x); |
1597 | assert(y); | |
1598 | ||
992c052c LP |
1599 | r = strcmp(x->path, y->path); |
1600 | if (r != 0) | |
1601 | return r; | |
1602 | ||
1603 | r = strcmp(x->interface, y->interface); | |
1604 | if (r != 0) | |
1605 | return r; | |
1606 | ||
1607 | return strcmp(x->member, y->member); | |
1608 | } | |
1609 | ||
d5099efc MS |
1610 | static const struct hash_ops vtable_member_hash_ops = { |
1611 | .hash = vtable_member_hash_func, | |
1612 | .compare = vtable_member_compare_func | |
1613 | }; | |
1614 | ||
992c052c LP |
1615 | static int add_object_vtable_internal( |
1616 | sd_bus *bus, | |
19befb2d | 1617 | sd_bus_slot **slot, |
992c052c LP |
1618 | const char *path, |
1619 | const char *interface, | |
1620 | const sd_bus_vtable *vtable, | |
1621 | bool fallback, | |
1622 | sd_bus_object_find_t find, | |
1623 | void *userdata) { | |
1624 | ||
2915234d | 1625 | sd_bus_slot *s = NULL; |
19befb2d | 1626 | struct node_vtable *i, *existing = NULL; |
992c052c LP |
1627 | const sd_bus_vtable *v; |
1628 | struct node *n; | |
1629 | int r; | |
1630 | ||
dfa92725 LP |
1631 | assert_return(bus, -EINVAL); |
1632 | assert_return(object_path_is_valid(path), -EINVAL); | |
1633 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
1634 | assert_return(vtable, -EINVAL); | |
1635 | assert_return(vtable[0].type == _SD_BUS_VTABLE_START, -EINVAL); | |
1636 | assert_return(vtable[0].x.start.element_size == sizeof(struct sd_bus_vtable), -EINVAL); | |
1637 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
718db961 LP |
1638 | assert_return(!streq(interface, "org.freedesktop.DBus.Properties") && |
1639 | !streq(interface, "org.freedesktop.DBus.Introspectable") && | |
1640 | !streq(interface, "org.freedesktop.DBus.Peer") && | |
1641 | !streq(interface, "org.freedesktop.DBus.ObjectManager"), -EINVAL); | |
992c052c | 1642 | |
d5099efc | 1643 | r = hashmap_ensure_allocated(&bus->vtable_methods, &vtable_member_hash_ops); |
992c052c LP |
1644 | if (r < 0) |
1645 | return r; | |
1646 | ||
d5099efc | 1647 | r = hashmap_ensure_allocated(&bus->vtable_properties, &vtable_member_hash_ops); |
992c052c LP |
1648 | if (r < 0) |
1649 | return r; | |
1650 | ||
1651 | n = bus_node_allocate(bus, path); | |
1652 | if (!n) | |
1653 | return -ENOMEM; | |
1654 | ||
1655 | LIST_FOREACH(vtables, i, n->vtables) { | |
992c052c LP |
1656 | if (i->is_fallback != fallback) { |
1657 | r = -EPROTOTYPE; | |
1658 | goto fail; | |
1659 | } | |
718db961 LP |
1660 | |
1661 | if (streq(i->interface, interface)) { | |
1662 | ||
1663 | if (i->vtable == vtable) { | |
1664 | r = -EEXIST; | |
1665 | goto fail; | |
1666 | } | |
1667 | ||
1668 | existing = i; | |
1669 | } | |
992c052c LP |
1670 | } |
1671 | ||
19befb2d LP |
1672 | s = bus_slot_allocate(bus, !slot, BUS_NODE_VTABLE, sizeof(struct node_vtable), userdata); |
1673 | if (!s) { | |
992c052c LP |
1674 | r = -ENOMEM; |
1675 | goto fail; | |
1676 | } | |
1677 | ||
19befb2d LP |
1678 | s->node_vtable.is_fallback = fallback; |
1679 | s->node_vtable.vtable = vtable; | |
1680 | s->node_vtable.find = find; | |
992c052c | 1681 | |
19befb2d LP |
1682 | s->node_vtable.interface = strdup(interface); |
1683 | if (!s->node_vtable.interface) { | |
992c052c LP |
1684 | r = -ENOMEM; |
1685 | goto fail; | |
1686 | } | |
1687 | ||
19befb2d | 1688 | for (v = s->node_vtable.vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
992c052c LP |
1689 | |
1690 | switch (v->type) { | |
1691 | ||
1692 | case _SD_BUS_VTABLE_METHOD: { | |
1693 | struct vtable_member *m; | |
1694 | ||
77a874a3 LP |
1695 | if (!member_name_is_valid(v->x.method.member) || |
1696 | !signature_is_valid(strempty(v->x.method.signature), false) || | |
1697 | !signature_is_valid(strempty(v->x.method.result), false) || | |
1698 | !(v->x.method.handler || (isempty(v->x.method.signature) && isempty(v->x.method.result))) || | |
df98a87b | 1699 | v->flags & (SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) { |
992c052c LP |
1700 | r = -EINVAL; |
1701 | goto fail; | |
1702 | } | |
1703 | ||
1704 | m = new0(struct vtable_member, 1); | |
1705 | if (!m) { | |
1706 | r = -ENOMEM; | |
1707 | goto fail; | |
1708 | } | |
1709 | ||
19befb2d | 1710 | m->parent = &s->node_vtable; |
992c052c | 1711 | m->path = n->path; |
19befb2d | 1712 | m->interface = s->node_vtable.interface; |
77a874a3 | 1713 | m->member = v->x.method.member; |
992c052c LP |
1714 | m->vtable = v; |
1715 | ||
1716 | r = hashmap_put(bus->vtable_methods, m, m); | |
1717 | if (r < 0) { | |
1718 | free(m); | |
1719 | goto fail; | |
1720 | } | |
1721 | ||
1722 | break; | |
1723 | } | |
1724 | ||
1725 | case _SD_BUS_VTABLE_WRITABLE_PROPERTY: | |
1726 | ||
77a874a3 | 1727 | if (!(v->x.property.set || bus_type_is_basic(v->x.property.signature[0]))) { |
992c052c LP |
1728 | r = -EINVAL; |
1729 | goto fail; | |
1730 | } | |
9b772efb LP |
1731 | |
1732 | if (v->flags & SD_BUS_VTABLE_PROPERTY_CONST) { | |
1733 | r = -EINVAL; | |
1734 | goto fail; | |
1735 | } | |
992c052c LP |
1736 | |
1737 | /* Fall through */ | |
1738 | ||
1739 | case _SD_BUS_VTABLE_PROPERTY: { | |
1740 | struct vtable_member *m; | |
1741 | ||
77a874a3 LP |
1742 | if (!member_name_is_valid(v->x.property.member) || |
1743 | !signature_is_single(v->x.property.signature, false) || | |
c13c7de3 | 1744 | !(v->x.property.get || bus_type_is_basic(v->x.property.signature[0]) || streq(v->x.property.signature, "as")) || |
33702051 | 1745 | (v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY) || |
df98a87b | 1746 | (!!(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 | 1747 | ((v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) && (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT)) || |
adacb957 | 1748 | (v->flags & SD_BUS_VTABLE_UNPRIVILEGED && v->type == _SD_BUS_VTABLE_PROPERTY)) { |
992c052c LP |
1749 | r = -EINVAL; |
1750 | goto fail; | |
1751 | } | |
1752 | ||
992c052c LP |
1753 | m = new0(struct vtable_member, 1); |
1754 | if (!m) { | |
1755 | r = -ENOMEM; | |
1756 | goto fail; | |
1757 | } | |
1758 | ||
19befb2d | 1759 | m->parent = &s->node_vtable; |
992c052c | 1760 | m->path = n->path; |
19befb2d | 1761 | m->interface = s->node_vtable.interface; |
77a874a3 | 1762 | m->member = v->x.property.member; |
992c052c LP |
1763 | m->vtable = v; |
1764 | ||
1765 | r = hashmap_put(bus->vtable_properties, m, m); | |
1766 | if (r < 0) { | |
1767 | free(m); | |
1768 | goto fail; | |
1769 | } | |
1770 | ||
1771 | break; | |
1772 | } | |
1773 | ||
1774 | case _SD_BUS_VTABLE_SIGNAL: | |
1775 | ||
77a874a3 | 1776 | if (!member_name_is_valid(v->x.signal.member) || |
adacb957 LP |
1777 | !signature_is_valid(strempty(v->x.signal.signature), false) || |
1778 | v->flags & SD_BUS_VTABLE_UNPRIVILEGED) { | |
992c052c LP |
1779 | r = -EINVAL; |
1780 | goto fail; | |
1781 | } | |
1782 | ||
1783 | break; | |
1784 | ||
1785 | default: | |
1786 | r = -EINVAL; | |
1787 | goto fail; | |
1788 | } | |
1789 | } | |
1790 | ||
19befb2d LP |
1791 | s->node_vtable.node = n; |
1792 | LIST_INSERT_AFTER(vtables, n->vtables, existing, &s->node_vtable); | |
68313d3d LP |
1793 | bus->nodes_modified = true; |
1794 | ||
19befb2d LP |
1795 | if (slot) |
1796 | *slot = s; | |
1797 | ||
992c052c LP |
1798 | return 0; |
1799 | ||
1800 | fail: | |
19befb2d | 1801 | sd_bus_slot_unref(s); |
dfa92725 LP |
1802 | bus_node_gc(bus, n); |
1803 | ||
19befb2d | 1804 | return r; |
992c052c LP |
1805 | } |
1806 | ||
d9f644e2 | 1807 | _public_ int sd_bus_add_object_vtable( |
992c052c | 1808 | sd_bus *bus, |
19befb2d | 1809 | sd_bus_slot **slot, |
992c052c LP |
1810 | const char *path, |
1811 | const char *interface, | |
1812 | const sd_bus_vtable *vtable, | |
1813 | void *userdata) { | |
1814 | ||
19befb2d | 1815 | return add_object_vtable_internal(bus, slot, path, interface, vtable, false, NULL, userdata); |
992c052c LP |
1816 | } |
1817 | ||
d9f644e2 | 1818 | _public_ int sd_bus_add_fallback_vtable( |
992c052c | 1819 | sd_bus *bus, |
19befb2d LP |
1820 | sd_bus_slot **slot, |
1821 | const char *prefix, | |
718db961 LP |
1822 | const char *interface, |
1823 | const sd_bus_vtable *vtable, | |
1824 | sd_bus_object_find_t find, | |
1825 | void *userdata) { | |
992c052c | 1826 | |
19befb2d | 1827 | return add_object_vtable_internal(bus, slot, prefix, interface, vtable, true, find, userdata); |
992c052c LP |
1828 | } |
1829 | ||
d9f644e2 | 1830 | _public_ int sd_bus_add_node_enumerator( |
992c052c | 1831 | sd_bus *bus, |
19befb2d | 1832 | sd_bus_slot **slot, |
992c052c LP |
1833 | const char *path, |
1834 | sd_bus_node_enumerator_t callback, | |
1835 | void *userdata) { | |
1836 | ||
19befb2d | 1837 | sd_bus_slot *s; |
992c052c LP |
1838 | struct node *n; |
1839 | int r; | |
1840 | ||
dfa92725 LP |
1841 | assert_return(bus, -EINVAL); |
1842 | assert_return(object_path_is_valid(path), -EINVAL); | |
1843 | assert_return(callback, -EINVAL); | |
1844 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c LP |
1845 | |
1846 | n = bus_node_allocate(bus, path); | |
1847 | if (!n) | |
1848 | return -ENOMEM; | |
1849 | ||
19befb2d LP |
1850 | s = bus_slot_allocate(bus, !slot, BUS_NODE_ENUMERATOR, sizeof(struct node_enumerator), userdata); |
1851 | if (!s) { | |
992c052c LP |
1852 | r = -ENOMEM; |
1853 | goto fail; | |
1854 | } | |
1855 | ||
19befb2d | 1856 | s->node_enumerator.callback = callback; |
68313d3d | 1857 | |
19befb2d LP |
1858 | s->node_enumerator.node = n; |
1859 | LIST_PREPEND(enumerators, n->enumerators, &s->node_enumerator); | |
68313d3d LP |
1860 | bus->nodes_modified = true; |
1861 | ||
19befb2d LP |
1862 | if (slot) |
1863 | *slot = s; | |
1864 | ||
992c052c LP |
1865 | return 0; |
1866 | ||
1867 | fail: | |
19befb2d | 1868 | sd_bus_slot_unref(s); |
992c052c LP |
1869 | bus_node_gc(bus, n); |
1870 | ||
19befb2d | 1871 | return r; |
992c052c LP |
1872 | } |
1873 | ||
1874 | static int emit_properties_changed_on_interface( | |
1875 | sd_bus *bus, | |
1876 | const char *prefix, | |
1877 | const char *path, | |
1878 | const char *interface, | |
1879 | bool require_fallback, | |
46525bfc | 1880 | bool *found_interface, |
992c052c LP |
1881 | char **names) { |
1882 | ||
f00c3121 | 1883 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c | 1884 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
718db961 LP |
1885 | bool has_invalidating = false, has_changing = false; |
1886 | struct vtable_member key = {}; | |
992c052c LP |
1887 | struct node_vtable *c; |
1888 | struct node *n; | |
1889 | char **property; | |
1890 | void *u = NULL; | |
1891 | int r; | |
1892 | ||
1893 | assert(bus); | |
dfa92725 | 1894 | assert(prefix); |
992c052c LP |
1895 | assert(path); |
1896 | assert(interface); | |
46525bfc | 1897 | assert(found_interface); |
992c052c LP |
1898 | |
1899 | n = hashmap_get(bus->nodes, prefix); | |
1900 | if (!n) | |
1901 | return 0; | |
1902 | ||
151b9b96 | 1903 | r = sd_bus_message_new_signal(bus, &m, path, "org.freedesktop.DBus.Properties", "PropertiesChanged"); |
992c052c LP |
1904 | if (r < 0) |
1905 | return r; | |
1906 | ||
1907 | r = sd_bus_message_append(m, "s", interface); | |
1908 | if (r < 0) | |
1909 | return r; | |
1910 | ||
1911 | r = sd_bus_message_open_container(m, 'a', "{sv}"); | |
1912 | if (r < 0) | |
1913 | return r; | |
1914 | ||
1915 | key.path = prefix; | |
1916 | key.interface = interface; | |
1917 | ||
718db961 LP |
1918 | LIST_FOREACH(vtables, c, n->vtables) { |
1919 | if (require_fallback && !c->is_fallback) | |
1920 | continue; | |
992c052c | 1921 | |
718db961 | 1922 | if (!streq(c->interface, interface)) |
992c052c | 1923 | continue; |
992c052c | 1924 | |
f00c3121 | 1925 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
992c052c LP |
1926 | if (r < 0) |
1927 | return r; | |
718db961 LP |
1928 | if (bus->nodes_modified) |
1929 | return 0; | |
1930 | if (r == 0) | |
1931 | continue; | |
992c052c | 1932 | |
46525bfc LP |
1933 | *found_interface = true; |
1934 | ||
a03e4337 LP |
1935 | if (names) { |
1936 | /* If the caller specified a list of | |
1937 | * properties we include exactly those in the | |
1938 | * PropertiesChanged message */ | |
992c052c | 1939 | |
a03e4337 LP |
1940 | STRV_FOREACH(property, names) { |
1941 | struct vtable_member *v; | |
992c052c | 1942 | |
a03e4337 | 1943 | assert_return(member_name_is_valid(*property), -EINVAL); |
718db961 | 1944 | |
a03e4337 LP |
1945 | key.member = *property; |
1946 | v = hashmap_get(bus->vtable_properties, &key); | |
1947 | if (!v) | |
1948 | return -ENOENT; | |
1949 | ||
1950 | /* If there are two vtables for the same | |
1951 | * interface, let's handle this property when | |
1952 | * we come to that vtable. */ | |
1953 | if (c != v->parent) | |
1954 | continue; | |
992c052c | 1955 | |
a03e4337 LP |
1956 | assert_return(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE || |
1957 | v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION, -EDOM); | |
992c052c | 1958 | |
a03e4337 LP |
1959 | assert_return(!(v->vtable->flags & SD_BUS_VTABLE_HIDDEN), -EDOM); |
1960 | ||
1961 | if (v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) { | |
1962 | has_invalidating = true; | |
1963 | continue; | |
1964 | } | |
1965 | ||
1966 | has_changing = true; | |
1967 | ||
1968 | r = vtable_append_one_property(bus, m, m->path, c, v->vtable, u, &error); | |
1969 | if (r < 0) | |
1970 | return r; | |
1971 | if (bus->nodes_modified) | |
1972 | return 0; | |
718db961 | 1973 | } |
a03e4337 LP |
1974 | } else { |
1975 | const sd_bus_vtable *v; | |
718db961 | 1976 | |
a03e4337 LP |
1977 | /* If the caller specified no properties list |
1978 | * we include all properties that are marked | |
1979 | * as changing in the message. */ | |
718db961 | 1980 | |
a03e4337 LP |
1981 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
1982 | if (v->type != _SD_BUS_VTABLE_PROPERTY && v->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) | |
1983 | continue; | |
718db961 | 1984 | |
a03e4337 LP |
1985 | if (v->flags & SD_BUS_VTABLE_HIDDEN) |
1986 | continue; | |
718db961 | 1987 | |
a03e4337 LP |
1988 | if (v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) { |
1989 | has_invalidating = true; | |
1990 | continue; | |
1991 | } | |
718db961 | 1992 | |
a03e4337 LP |
1993 | if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE)) |
1994 | continue; | |
718db961 | 1995 | |
a03e4337 | 1996 | has_changing = true; |
718db961 | 1997 | |
a03e4337 LP |
1998 | r = vtable_append_one_property(bus, m, m->path, c, v, u, &error); |
1999 | if (r < 0) | |
2000 | return r; | |
2001 | if (bus->nodes_modified) | |
2002 | return 0; | |
2003 | } | |
718db961 | 2004 | } |
992c052c LP |
2005 | } |
2006 | ||
718db961 LP |
2007 | if (!has_invalidating && !has_changing) |
2008 | return 0; | |
2009 | ||
992c052c LP |
2010 | r = sd_bus_message_close_container(m); |
2011 | if (r < 0) | |
2012 | return r; | |
2013 | ||
2014 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2015 | if (r < 0) | |
2016 | return r; | |
2017 | ||
2018 | if (has_invalidating) { | |
718db961 LP |
2019 | LIST_FOREACH(vtables, c, n->vtables) { |
2020 | if (require_fallback && !c->is_fallback) | |
2021 | continue; | |
992c052c | 2022 | |
718db961 | 2023 | if (!streq(c->interface, interface)) |
992c052c LP |
2024 | continue; |
2025 | ||
f00c3121 | 2026 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
992c052c LP |
2027 | if (r < 0) |
2028 | return r; | |
718db961 LP |
2029 | if (bus->nodes_modified) |
2030 | return 0; | |
2031 | if (r == 0) | |
2032 | continue; | |
2033 | ||
a03e4337 LP |
2034 | if (names) { |
2035 | STRV_FOREACH(property, names) { | |
2036 | struct vtable_member *v; | |
718db961 | 2037 | |
a03e4337 LP |
2038 | key.member = *property; |
2039 | assert_se(v = hashmap_get(bus->vtable_properties, &key)); | |
2040 | assert(c == v->parent); | |
718db961 | 2041 | |
a03e4337 LP |
2042 | if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) |
2043 | continue; | |
718db961 | 2044 | |
a03e4337 LP |
2045 | r = sd_bus_message_append(m, "s", *property); |
2046 | if (r < 0) | |
2047 | return r; | |
2048 | } | |
2049 | } else { | |
2050 | const sd_bus_vtable *v; | |
2051 | ||
2052 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { | |
2053 | if (v->type != _SD_BUS_VTABLE_PROPERTY && v->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) | |
2054 | continue; | |
2055 | ||
2056 | if (v->flags & SD_BUS_VTABLE_HIDDEN) | |
2057 | continue; | |
2058 | ||
2059 | if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) | |
2060 | continue; | |
2061 | ||
2062 | r = sd_bus_message_append(m, "s", v->x.property.member); | |
2063 | if (r < 0) | |
2064 | return r; | |
2065 | } | |
718db961 | 2066 | } |
992c052c LP |
2067 | } |
2068 | } | |
2069 | ||
2070 | r = sd_bus_message_close_container(m); | |
2071 | if (r < 0) | |
2072 | return r; | |
2073 | ||
2074 | r = sd_bus_send(bus, m, NULL); | |
2075 | if (r < 0) | |
2076 | return r; | |
2077 | ||
2078 | return 1; | |
2079 | } | |
2080 | ||
d9f644e2 | 2081 | _public_ int sd_bus_emit_properties_changed_strv( |
dfa92725 LP |
2082 | sd_bus *bus, |
2083 | const char *path, | |
2084 | const char *interface, | |
2085 | char **names) { | |
2086 | ||
8ce2afd6 | 2087 | BUS_DONT_DESTROY(bus); |
46525bfc | 2088 | bool found_interface = false; |
92e189e5 | 2089 | char *prefix; |
992c052c LP |
2090 | int r; |
2091 | ||
dfa92725 LP |
2092 | assert_return(bus, -EINVAL); |
2093 | assert_return(object_path_is_valid(path), -EINVAL); | |
2094 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
dfa92725 LP |
2095 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2096 | ||
a3d59cd1 LP |
2097 | if (!BUS_IS_OPEN(bus->state)) |
2098 | return -ENOTCONN; | |
a03e4337 LP |
2099 | |
2100 | /* A non-NULL but empty names list means nothing needs to be | |
2101 | generated. A NULL list OTOH indicates that all properties | |
2102 | that are set to EMITS_CHANGE or EMITS_INVALIDATION shall be | |
2103 | included in the PropertiesChanged message. */ | |
2104 | if (names && names[0] == NULL) | |
dfa92725 | 2105 | return 0; |
992c052c | 2106 | |
68313d3d LP |
2107 | do { |
2108 | bus->nodes_modified = false; | |
992c052c | 2109 | |
46525bfc | 2110 | r = emit_properties_changed_on_interface(bus, path, path, interface, false, &found_interface, names); |
92e189e5 LP |
2111 | if (r != 0) |
2112 | return r; | |
68313d3d LP |
2113 | if (bus->nodes_modified) |
2114 | continue; | |
2115 | ||
2116 | prefix = alloca(strlen(path) + 1); | |
2117 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
46525bfc | 2118 | r = emit_properties_changed_on_interface(bus, prefix, path, interface, true, &found_interface, names); |
68313d3d LP |
2119 | if (r != 0) |
2120 | return r; | |
2121 | if (bus->nodes_modified) | |
2122 | break; | |
2123 | } | |
2124 | ||
2125 | } while (bus->nodes_modified); | |
992c052c | 2126 | |
46525bfc | 2127 | return found_interface ? 0 : -ENOENT; |
992c052c LP |
2128 | } |
2129 | ||
d9f644e2 | 2130 | _public_ int sd_bus_emit_properties_changed( |
dfa92725 LP |
2131 | sd_bus *bus, |
2132 | const char *path, | |
2133 | const char *interface, | |
2134 | const char *name, ...) { | |
2135 | ||
250a918d | 2136 | char **names; |
992c052c | 2137 | |
dfa92725 LP |
2138 | assert_return(bus, -EINVAL); |
2139 | assert_return(object_path_is_valid(path), -EINVAL); | |
2140 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
dfa92725 LP |
2141 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2142 | ||
a3d59cd1 LP |
2143 | if (!BUS_IS_OPEN(bus->state)) |
2144 | return -ENOTCONN; | |
2145 | ||
dfa92725 LP |
2146 | if (!name) |
2147 | return 0; | |
2148 | ||
250a918d | 2149 | names = strv_from_stdarg_alloca(name); |
992c052c LP |
2150 | |
2151 | return sd_bus_emit_properties_changed_strv(bus, path, interface, names); | |
2152 | } | |
2153 | ||
d95eb43e DH |
2154 | static int object_added_append_all_prefix( |
2155 | sd_bus *bus, | |
2156 | sd_bus_message *m, | |
2157 | Set *s, | |
2158 | const char *prefix, | |
2159 | const char *path, | |
2160 | bool require_fallback) { | |
2161 | ||
2162 | const char *previous_interface = NULL; | |
2163 | struct node_vtable *c; | |
2164 | struct node *n; | |
2165 | int r; | |
2166 | ||
2167 | assert(bus); | |
2168 | assert(m); | |
2169 | assert(s); | |
2170 | assert(prefix); | |
2171 | assert(path); | |
2172 | ||
2173 | n = hashmap_get(bus->nodes, prefix); | |
2174 | if (!n) | |
2175 | return 0; | |
2176 | ||
2177 | LIST_FOREACH(vtables, c, n->vtables) { | |
2178 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
2179 | void *u = NULL; | |
2180 | ||
2181 | if (require_fallback && !c->is_fallback) | |
2182 | continue; | |
2183 | ||
2184 | r = node_vtable_get_userdata(bus, path, c, &u, &error); | |
2185 | if (r < 0) | |
2186 | return r; | |
2187 | if (bus->nodes_modified) | |
2188 | return 0; | |
2189 | if (r == 0) | |
2190 | continue; | |
2191 | ||
2192 | if (!streq_ptr(c->interface, previous_interface)) { | |
2193 | /* If a child-node already handled this interface, we | |
2194 | * skip it on any of its parents. The child vtables | |
2195 | * always fully override any conflicting vtables of | |
2196 | * any parent node. */ | |
2197 | if (set_get(s, c->interface)) | |
2198 | continue; | |
2199 | ||
2200 | r = set_put(s, c->interface); | |
2201 | if (r < 0) | |
2202 | return r; | |
2203 | ||
2204 | if (previous_interface) { | |
2205 | r = sd_bus_message_close_container(m); | |
2206 | if (r < 0) | |
2207 | return r; | |
2208 | r = sd_bus_message_close_container(m); | |
2209 | if (r < 0) | |
2210 | return r; | |
2211 | } | |
2212 | ||
2213 | r = sd_bus_message_open_container(m, 'e', "sa{sv}"); | |
2214 | if (r < 0) | |
2215 | return r; | |
2216 | r = sd_bus_message_append(m, "s", c->interface); | |
2217 | if (r < 0) | |
2218 | return r; | |
2219 | r = sd_bus_message_open_container(m, 'a', "{sv}"); | |
2220 | if (r < 0) | |
2221 | return r; | |
2222 | ||
2223 | previous_interface = c->interface; | |
2224 | } | |
2225 | ||
2226 | r = vtable_append_all_properties(bus, m, path, c, u, &error); | |
2227 | if (r < 0) | |
2228 | return r; | |
2229 | if (bus->nodes_modified) | |
2230 | return 0; | |
2231 | } | |
2232 | ||
2233 | if (previous_interface) { | |
2234 | r = sd_bus_message_close_container(m); | |
2235 | if (r < 0) | |
2236 | return r; | |
2237 | r = sd_bus_message_close_container(m); | |
2238 | if (r < 0) | |
2239 | return r; | |
2240 | } | |
2241 | ||
2242 | return 0; | |
2243 | } | |
2244 | ||
2245 | static int object_added_append_all(sd_bus *bus, sd_bus_message *m, const char *path) { | |
2246 | _cleanup_set_free_ Set *s = NULL; | |
2247 | char *prefix; | |
2248 | int r; | |
2249 | ||
2250 | assert(bus); | |
2251 | assert(m); | |
2252 | assert(path); | |
2253 | ||
2254 | /* | |
2255 | * This appends all interfaces registered on path @path. We first add | |
2256 | * the builtin interfaces, which are always available and handled by | |
2257 | * sd-bus. Then, we add all interfaces registered on the exact node, | |
2258 | * followed by all fallback interfaces registered on any parent prefix. | |
2259 | * | |
2260 | * If an interface is registered multiple times on the same node with | |
2261 | * different vtables, we merge all the properties across all vtables. | |
2262 | * However, if a child node has the same interface registered as one of | |
2263 | * its parent nodes has as fallback, we make the child overwrite the | |
2264 | * parent instead of extending it. Therefore, we keep a "Set" of all | |
2265 | * handled interfaces during parent traversal, so we skip interfaces on | |
2266 | * a parent that were overwritten by a child. | |
2267 | */ | |
2268 | ||
2269 | s = set_new(&string_hash_ops); | |
2270 | if (!s) | |
2271 | return -ENOMEM; | |
2272 | ||
2273 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Peer", 0); | |
2274 | if (r < 0) | |
2275 | return r; | |
2276 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Introspectable", 0); | |
2277 | if (r < 0) | |
2278 | return r; | |
2279 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Properties", 0); | |
2280 | if (r < 0) | |
2281 | return r; | |
2282 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.ObjectManager", 0); | |
2283 | if (r < 0) | |
2284 | return r; | |
2285 | ||
2286 | r = object_added_append_all_prefix(bus, m, s, path, path, false); | |
2287 | if (r < 0) | |
2288 | return r; | |
2289 | if (bus->nodes_modified) | |
2290 | return 0; | |
2291 | ||
2292 | prefix = alloca(strlen(path) + 1); | |
2293 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2294 | r = object_added_append_all_prefix(bus, m, s, prefix, path, true); | |
2295 | if (r < 0) | |
2296 | return r; | |
2297 | if (bus->nodes_modified) | |
2298 | return 0; | |
2299 | } | |
2300 | ||
2301 | return 0; | |
2302 | } | |
2303 | ||
969a9685 | 2304 | _public_ int sd_bus_emit_object_added(sd_bus *bus, const char *path) { |
d95eb43e DH |
2305 | BUS_DONT_DESTROY(bus); |
2306 | ||
2307 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2d5c8a27 | 2308 | struct node *object_manager; |
d95eb43e DH |
2309 | int r; |
2310 | ||
2311 | /* | |
2312 | * This emits an InterfacesAdded signal on the given path, by iterating | |
2313 | * all registered vtables and fallback vtables on the path. All | |
2314 | * properties are queried and included in the signal. | |
2315 | * This call is equivalent to sd_bus_emit_interfaces_added() with an | |
2316 | * explicit list of registered interfaces. However, unlike | |
2317 | * interfaces_added(), this call can figure out the list of supported | |
2318 | * interfaces itself. Furthermore, it properly adds the builtin | |
2319 | * org.freedesktop.DBus.* interfaces. | |
2320 | */ | |
2321 | ||
2322 | assert_return(bus, -EINVAL); | |
2323 | assert_return(object_path_is_valid(path), -EINVAL); | |
2324 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2325 | ||
2326 | if (!BUS_IS_OPEN(bus->state)) | |
2327 | return -ENOTCONN; | |
2328 | ||
2d5c8a27 DH |
2329 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2330 | if (r < 0) | |
2331 | return r; | |
2332 | if (r == 0) | |
2333 | return -ESRCH; | |
2334 | ||
d95eb43e DH |
2335 | do { |
2336 | bus->nodes_modified = false; | |
2337 | m = sd_bus_message_unref(m); | |
2338 | ||
2d5c8a27 | 2339 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded"); |
d95eb43e DH |
2340 | if (r < 0) |
2341 | return r; | |
2342 | ||
2343 | r = sd_bus_message_append_basic(m, 'o', path); | |
2344 | if (r < 0) | |
2345 | return r; | |
2346 | ||
2347 | r = sd_bus_message_open_container(m, 'a', "{sa{sv}}"); | |
2348 | if (r < 0) | |
2349 | return r; | |
2350 | ||
2351 | r = object_added_append_all(bus, m, path); | |
2352 | if (r < 0) | |
2353 | return r; | |
2354 | ||
2355 | if (bus->nodes_modified) | |
2356 | continue; | |
2357 | ||
2358 | r = sd_bus_message_close_container(m); | |
2359 | if (r < 0) | |
2360 | return r; | |
2361 | ||
2362 | } while (bus->nodes_modified); | |
2363 | ||
2364 | return sd_bus_send(bus, m, NULL); | |
2365 | } | |
2366 | ||
2367 | static int object_removed_append_all_prefix( | |
2368 | sd_bus *bus, | |
2369 | sd_bus_message *m, | |
2370 | Set *s, | |
2371 | const char *prefix, | |
2372 | const char *path, | |
2373 | bool require_fallback) { | |
2374 | ||
2375 | const char *previous_interface = NULL; | |
2376 | struct node_vtable *c; | |
2377 | struct node *n; | |
2378 | int r; | |
2379 | ||
2380 | assert(bus); | |
2381 | assert(m); | |
2382 | assert(s); | |
2383 | assert(prefix); | |
2384 | assert(path); | |
2385 | ||
2386 | n = hashmap_get(bus->nodes, prefix); | |
2387 | if (!n) | |
2388 | return 0; | |
2389 | ||
2390 | LIST_FOREACH(vtables, c, n->vtables) { | |
2391 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
2392 | void *u = NULL; | |
2393 | ||
2394 | if (require_fallback && !c->is_fallback) | |
2395 | continue; | |
2396 | if (streq_ptr(c->interface, previous_interface)) | |
2397 | continue; | |
2398 | ||
2399 | /* If a child-node already handled this interface, we | |
2400 | * skip it on any of its parents. The child vtables | |
2401 | * always fully override any conflicting vtables of | |
2402 | * any parent node. */ | |
2403 | if (set_get(s, c->interface)) | |
2404 | continue; | |
2405 | ||
2406 | r = node_vtable_get_userdata(bus, path, c, &u, &error); | |
2407 | if (r < 0) | |
2408 | return r; | |
2409 | if (bus->nodes_modified) | |
2410 | return 0; | |
2411 | if (r == 0) | |
2412 | continue; | |
2413 | ||
2414 | r = set_put(s, c->interface); | |
2415 | if (r < 0) | |
2416 | return r; | |
2417 | ||
2418 | r = sd_bus_message_append(m, "s", c->interface); | |
2419 | if (r < 0) | |
2420 | return r; | |
2421 | ||
2422 | previous_interface = c->interface; | |
2423 | } | |
2424 | ||
2425 | return 0; | |
2426 | } | |
2427 | ||
2428 | static int object_removed_append_all(sd_bus *bus, sd_bus_message *m, const char *path) { | |
2429 | _cleanup_set_free_ Set *s = NULL; | |
2430 | char *prefix; | |
2431 | int r; | |
2432 | ||
2433 | assert(bus); | |
2434 | assert(m); | |
2435 | assert(path); | |
2436 | ||
2437 | /* see sd_bus_emit_object_added() for details */ | |
2438 | ||
2439 | s = set_new(&string_hash_ops); | |
2440 | if (!s) | |
2441 | return -ENOMEM; | |
2442 | ||
2443 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Peer"); | |
2444 | if (r < 0) | |
2445 | return r; | |
2446 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Introspectable"); | |
2447 | if (r < 0) | |
2448 | return r; | |
2449 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Properties"); | |
2450 | if (r < 0) | |
2451 | return r; | |
2452 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.ObjectManager"); | |
2453 | if (r < 0) | |
2454 | return r; | |
2455 | ||
2456 | r = object_removed_append_all_prefix(bus, m, s, path, path, false); | |
2457 | if (r < 0) | |
2458 | return r; | |
2459 | if (bus->nodes_modified) | |
2460 | return 0; | |
2461 | ||
2462 | prefix = alloca(strlen(path) + 1); | |
2463 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2464 | r = object_removed_append_all_prefix(bus, m, s, prefix, path, true); | |
2465 | if (r < 0) | |
2466 | return r; | |
2467 | if (bus->nodes_modified) | |
2468 | return 0; | |
2469 | } | |
2470 | ||
2471 | return 0; | |
2472 | } | |
2473 | ||
969a9685 | 2474 | _public_ int sd_bus_emit_object_removed(sd_bus *bus, const char *path) { |
d95eb43e DH |
2475 | BUS_DONT_DESTROY(bus); |
2476 | ||
2477 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2d5c8a27 | 2478 | struct node *object_manager; |
d95eb43e DH |
2479 | int r; |
2480 | ||
2481 | /* | |
2482 | * This is like sd_bus_emit_object_added(), but emits an | |
2483 | * InterfacesRemoved signal on the given path. This only includes any | |
2484 | * registered interfaces but skips the properties. Note that this will | |
2485 | * call into the find() callbacks of any registered vtable. Therefore, | |
2486 | * you must call this function before destroying/unlinking your object. | |
2487 | * Otherwise, the list of interfaces will be incomplete. However, note | |
2488 | * that this will *NOT* call into any property callback. Therefore, the | |
2489 | * object might be in an "destructed" state, as long as we can find it. | |
2490 | */ | |
2491 | ||
2492 | assert_return(bus, -EINVAL); | |
2493 | assert_return(object_path_is_valid(path), -EINVAL); | |
2494 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2495 | ||
2496 | if (!BUS_IS_OPEN(bus->state)) | |
2497 | return -ENOTCONN; | |
2498 | ||
2d5c8a27 DH |
2499 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2500 | if (r < 0) | |
2501 | return r; | |
2502 | if (r == 0) | |
2503 | return -ESRCH; | |
2504 | ||
d95eb43e DH |
2505 | do { |
2506 | bus->nodes_modified = false; | |
2507 | m = sd_bus_message_unref(m); | |
2508 | ||
2d5c8a27 | 2509 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved"); |
d95eb43e DH |
2510 | if (r < 0) |
2511 | return r; | |
2512 | ||
2513 | r = sd_bus_message_append_basic(m, 'o', path); | |
2514 | if (r < 0) | |
2515 | return r; | |
2516 | ||
2517 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2518 | if (r < 0) | |
2519 | return r; | |
2520 | ||
2521 | r = object_removed_append_all(bus, m, path); | |
2522 | if (r < 0) | |
2523 | return r; | |
2524 | ||
2525 | if (bus->nodes_modified) | |
2526 | continue; | |
2527 | ||
2528 | r = sd_bus_message_close_container(m); | |
2529 | if (r < 0) | |
2530 | return r; | |
2531 | ||
2532 | } while (bus->nodes_modified); | |
2533 | ||
2534 | return sd_bus_send(bus, m, NULL); | |
2535 | } | |
2536 | ||
4be39163 LP |
2537 | static int interfaces_added_append_one_prefix( |
2538 | sd_bus *bus, | |
2539 | sd_bus_message *m, | |
2540 | const char *prefix, | |
2541 | const char *path, | |
2542 | const char *interface, | |
2543 | bool require_fallback) { | |
2544 | ||
2545 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
718db961 | 2546 | bool found_interface = false; |
4be39163 LP |
2547 | struct node_vtable *c; |
2548 | struct node *n; | |
2549 | void *u = NULL; | |
2550 | int r; | |
2551 | ||
2552 | assert(bus); | |
2553 | assert(m); | |
2554 | assert(prefix); | |
2555 | assert(path); | |
2556 | assert(interface); | |
2557 | ||
2558 | n = hashmap_get(bus->nodes, prefix); | |
2559 | if (!n) | |
2560 | return 0; | |
2561 | ||
2562 | LIST_FOREACH(vtables, c, n->vtables) { | |
2563 | if (require_fallback && !c->is_fallback) | |
2564 | continue; | |
2565 | ||
718db961 LP |
2566 | if (!streq(c->interface, interface)) |
2567 | continue; | |
4be39163 | 2568 | |
f00c3121 | 2569 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
718db961 LP |
2570 | if (r < 0) |
2571 | return r; | |
2572 | if (bus->nodes_modified) | |
2573 | return 0; | |
2574 | if (r == 0) | |
2575 | continue; | |
4be39163 | 2576 | |
718db961 LP |
2577 | if (!found_interface) { |
2578 | r = sd_bus_message_append_basic(m, 's', interface); | |
2579 | if (r < 0) | |
2580 | return r; | |
4be39163 | 2581 | |
718db961 LP |
2582 | r = sd_bus_message_open_container(m, 'a', "{sv}"); |
2583 | if (r < 0) | |
2584 | return r; | |
4be39163 | 2585 | |
718db961 LP |
2586 | found_interface = true; |
2587 | } | |
4be39163 | 2588 | |
718db961 LP |
2589 | r = vtable_append_all_properties(bus, m, path, c, u, &error); |
2590 | if (r < 0) | |
2591 | return r; | |
2592 | if (bus->nodes_modified) | |
2593 | return 0; | |
2594 | } | |
4be39163 | 2595 | |
718db961 LP |
2596 | if (found_interface) { |
2597 | r = sd_bus_message_close_container(m); | |
2598 | if (r < 0) | |
2599 | return r; | |
2600 | } | |
4be39163 | 2601 | |
718db961 | 2602 | return found_interface; |
4be39163 LP |
2603 | } |
2604 | ||
2605 | static int interfaces_added_append_one( | |
2606 | sd_bus *bus, | |
2607 | sd_bus_message *m, | |
2608 | const char *path, | |
2609 | const char *interface) { | |
2610 | ||
2611 | char *prefix; | |
2612 | int r; | |
2613 | ||
2614 | assert(bus); | |
2615 | assert(m); | |
2616 | assert(path); | |
2617 | assert(interface); | |
2618 | ||
2619 | r = interfaces_added_append_one_prefix(bus, m, path, path, interface, false); | |
2620 | if (r != 0) | |
2621 | return r; | |
68313d3d LP |
2622 | if (bus->nodes_modified) |
2623 | return 0; | |
4be39163 LP |
2624 | |
2625 | prefix = alloca(strlen(path) + 1); | |
2626 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2627 | r = interfaces_added_append_one_prefix(bus, m, prefix, path, interface, true); | |
2628 | if (r != 0) | |
2629 | return r; | |
68313d3d LP |
2630 | if (bus->nodes_modified) |
2631 | return 0; | |
4be39163 LP |
2632 | } |
2633 | ||
2634 | return -ENOENT; | |
992c052c LP |
2635 | } |
2636 | ||
d9f644e2 | 2637 | _public_ int sd_bus_emit_interfaces_added_strv(sd_bus *bus, const char *path, char **interfaces) { |
8ce2afd6 LP |
2638 | BUS_DONT_DESTROY(bus); |
2639 | ||
4be39163 | 2640 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
2d5c8a27 | 2641 | struct node *object_manager; |
4be39163 LP |
2642 | char **i; |
2643 | int r; | |
2644 | ||
2645 | assert_return(bus, -EINVAL); | |
2646 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2647 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2648 | ||
a3d59cd1 LP |
2649 | if (!BUS_IS_OPEN(bus->state)) |
2650 | return -ENOTCONN; | |
2651 | ||
4be39163 LP |
2652 | if (strv_isempty(interfaces)) |
2653 | return 0; | |
2654 | ||
2d5c8a27 DH |
2655 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2656 | if (r < 0) | |
2657 | return r; | |
2658 | if (r == 0) | |
2659 | return -ESRCH; | |
2660 | ||
68313d3d LP |
2661 | do { |
2662 | bus->nodes_modified = false; | |
1b02f301 | 2663 | m = sd_bus_message_unref(m); |
4be39163 | 2664 | |
2d5c8a27 | 2665 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded"); |
68313d3d LP |
2666 | if (r < 0) |
2667 | return r; | |
4be39163 | 2668 | |
68313d3d | 2669 | r = sd_bus_message_append_basic(m, 'o', path); |
4be39163 LP |
2670 | if (r < 0) |
2671 | return r; | |
2672 | ||
68313d3d | 2673 | r = sd_bus_message_open_container(m, 'a', "{sa{sv}}"); |
4be39163 LP |
2674 | if (r < 0) |
2675 | return r; | |
2676 | ||
68313d3d LP |
2677 | STRV_FOREACH(i, interfaces) { |
2678 | assert_return(interface_name_is_valid(*i), -EINVAL); | |
2679 | ||
2680 | r = sd_bus_message_open_container(m, 'e', "sa{sv}"); | |
2681 | if (r < 0) | |
2682 | return r; | |
2683 | ||
2684 | r = interfaces_added_append_one(bus, m, path, *i); | |
2685 | if (r < 0) | |
2686 | return r; | |
2687 | ||
2688 | if (bus->nodes_modified) | |
2689 | break; | |
2690 | ||
2691 | r = sd_bus_message_close_container(m); | |
2692 | if (r < 0) | |
2693 | return r; | |
2694 | } | |
2695 | ||
2696 | if (bus->nodes_modified) | |
2697 | continue; | |
2698 | ||
4be39163 LP |
2699 | r = sd_bus_message_close_container(m); |
2700 | if (r < 0) | |
2701 | return r; | |
4be39163 | 2702 | |
68313d3d | 2703 | } while (bus->nodes_modified); |
4be39163 LP |
2704 | |
2705 | return sd_bus_send(bus, m, NULL); | |
2706 | } | |
2707 | ||
d9f644e2 | 2708 | _public_ int sd_bus_emit_interfaces_added(sd_bus *bus, const char *path, const char *interface, ...) { |
250a918d | 2709 | char **interfaces; |
4be39163 LP |
2710 | |
2711 | assert_return(bus, -EINVAL); | |
2712 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2713 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2714 | ||
a3d59cd1 LP |
2715 | if (!BUS_IS_OPEN(bus->state)) |
2716 | return -ENOTCONN; | |
2717 | ||
250a918d | 2718 | interfaces = strv_from_stdarg_alloca(interface); |
4be39163 LP |
2719 | |
2720 | return sd_bus_emit_interfaces_added_strv(bus, path, interfaces); | |
2721 | } | |
2722 | ||
d9f644e2 | 2723 | _public_ int sd_bus_emit_interfaces_removed_strv(sd_bus *bus, const char *path, char **interfaces) { |
4be39163 | 2724 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
2d5c8a27 | 2725 | struct node *object_manager; |
4be39163 LP |
2726 | int r; |
2727 | ||
2728 | assert_return(bus, -EINVAL); | |
2729 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2730 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2731 | ||
a3d59cd1 LP |
2732 | if (!BUS_IS_OPEN(bus->state)) |
2733 | return -ENOTCONN; | |
2734 | ||
4be39163 LP |
2735 | if (strv_isempty(interfaces)) |
2736 | return 0; | |
2737 | ||
2d5c8a27 DH |
2738 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2739 | if (r < 0) | |
2740 | return r; | |
2741 | if (r == 0) | |
2742 | return -ESRCH; | |
2743 | ||
2744 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved"); | |
4be39163 LP |
2745 | if (r < 0) |
2746 | return r; | |
2747 | ||
2748 | r = sd_bus_message_append_basic(m, 'o', path); | |
2749 | if (r < 0) | |
2750 | return r; | |
2751 | ||
2752 | r = sd_bus_message_append_strv(m, interfaces); | |
2753 | if (r < 0) | |
2754 | return r; | |
2755 | ||
2756 | return sd_bus_send(bus, m, NULL); | |
2757 | } | |
2758 | ||
d9f644e2 | 2759 | _public_ int sd_bus_emit_interfaces_removed(sd_bus *bus, const char *path, const char *interface, ...) { |
250a918d | 2760 | char **interfaces; |
4be39163 LP |
2761 | |
2762 | assert_return(bus, -EINVAL); | |
2763 | assert_return(object_path_is_valid(path), -EINVAL); | |
4be39163 LP |
2764 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2765 | ||
a3d59cd1 LP |
2766 | if (!BUS_IS_OPEN(bus->state)) |
2767 | return -ENOTCONN; | |
2768 | ||
250a918d | 2769 | interfaces = strv_from_stdarg_alloca(interface); |
4be39163 LP |
2770 | |
2771 | return sd_bus_emit_interfaces_removed_strv(bus, path, interfaces); | |
992c052c LP |
2772 | } |
2773 | ||
19befb2d LP |
2774 | _public_ int sd_bus_add_object_manager(sd_bus *bus, sd_bus_slot **slot, const char *path) { |
2775 | sd_bus_slot *s; | |
992c052c | 2776 | struct node *n; |
19befb2d | 2777 | int r; |
992c052c | 2778 | |
dfa92725 LP |
2779 | assert_return(bus, -EINVAL); |
2780 | assert_return(object_path_is_valid(path), -EINVAL); | |
2781 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c LP |
2782 | |
2783 | n = bus_node_allocate(bus, path); | |
2784 | if (!n) | |
2785 | return -ENOMEM; | |
2786 | ||
19befb2d LP |
2787 | s = bus_slot_allocate(bus, !slot, BUS_NODE_OBJECT_MANAGER, sizeof(struct node_object_manager), NULL); |
2788 | if (!s) { | |
2789 | r = -ENOMEM; | |
2790 | goto fail; | |
2791 | } | |
992c052c | 2792 | |
19befb2d LP |
2793 | s->node_object_manager.node = n; |
2794 | LIST_PREPEND(object_managers, n->object_managers, &s->node_object_manager); | |
2795 | bus->nodes_modified = true; | |
992c052c | 2796 | |
19befb2d LP |
2797 | if (slot) |
2798 | *slot = s; | |
992c052c | 2799 | |
19befb2d | 2800 | return 0; |
992c052c | 2801 | |
19befb2d LP |
2802 | fail: |
2803 | sd_bus_slot_unref(s); | |
992c052c | 2804 | bus_node_gc(bus, n); |
dfa92725 | 2805 | |
19befb2d | 2806 | return r; |
992c052c | 2807 | } |