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de1c301e 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 | ||
22 | #include <endian.h> | |
23 | #include <assert.h> | |
24 | #include <stdlib.h> | |
25 | #include <unistd.h> | |
26 | #include <netdb.h> | |
27 | #include <sys/poll.h> | |
28 | #include <byteswap.h> | |
29 | ||
30 | #include "util.h" | |
31 | #include "macro.h" | |
2fd9ae2e | 32 | #include "strv.h" |
0a72c2bd | 33 | #include "set.h" |
de1c301e LP |
34 | |
35 | #include "sd-bus.h" | |
36 | #include "bus-internal.h" | |
37 | #include "bus-message.h" | |
38 | #include "bus-type.h" | |
a7e3212d | 39 | #include "bus-socket.h" |
de1c301e | 40 | |
e3017af9 LP |
41 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
42 | ||
de1c301e LP |
43 | static void bus_free(sd_bus *b) { |
44 | struct filter_callback *f; | |
a652755d | 45 | struct object_callback *c; |
89ffcd2a | 46 | unsigned i; |
de1c301e LP |
47 | |
48 | assert(b); | |
49 | ||
50 | if (b->fd >= 0) | |
51 | close_nointr_nofail(b->fd); | |
52 | ||
53 | free(b->rbuffer); | |
89ffcd2a LP |
54 | free(b->unique_name); |
55 | free(b->auth_uid); | |
56 | free(b->address); | |
57 | ||
2fd9ae2e LP |
58 | free(b->exec_path); |
59 | strv_free(b->exec_argv); | |
60 | ||
2c93b4ef LP |
61 | close_many(b->fds, b->n_fds); |
62 | free(b->fds); | |
63 | ||
89ffcd2a LP |
64 | for (i = 0; i < b->rqueue_size; i++) |
65 | sd_bus_message_unref(b->rqueue[i]); | |
de1c301e | 66 | free(b->rqueue); |
89ffcd2a LP |
67 | |
68 | for (i = 0; i < b->wqueue_size; i++) | |
69 | sd_bus_message_unref(b->wqueue[i]); | |
de1c301e | 70 | free(b->wqueue); |
de1c301e LP |
71 | |
72 | hashmap_free_free(b->reply_callbacks); | |
e3017af9 | 73 | prioq_free(b->reply_callbacks_prioq); |
de1c301e LP |
74 | |
75 | while ((f = b->filter_callbacks)) { | |
76 | LIST_REMOVE(struct filter_callback, callbacks, b->filter_callbacks, f); | |
77 | free(f); | |
78 | } | |
79 | ||
a652755d LP |
80 | while ((c = hashmap_steal_first(b->object_callbacks))) { |
81 | free(c->path); | |
82 | free(c); | |
83 | } | |
84 | ||
85 | hashmap_free(b->object_callbacks); | |
86 | ||
de1c301e LP |
87 | free(b); |
88 | } | |
89 | ||
021a1e78 | 90 | int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
91 | sd_bus *r; |
92 | ||
021a1e78 LP |
93 | if (!ret) |
94 | return -EINVAL; | |
95 | ||
de1c301e LP |
96 | r = new0(sd_bus, 1); |
97 | if (!r) | |
021a1e78 | 98 | return -ENOMEM; |
de1c301e LP |
99 | |
100 | r->n_ref = 1; | |
101 | r->fd = -1; | |
102 | r->message_version = 1; | |
021a1e78 | 103 | r->negotiate_fds = true; |
de1c301e LP |
104 | |
105 | /* We guarantee that wqueue always has space for at least one | |
106 | * entry */ | |
107 | r->wqueue = new(sd_bus_message*, 1); | |
108 | if (!r->wqueue) { | |
109 | free(r); | |
021a1e78 | 110 | return -ENOMEM; |
de1c301e LP |
111 | } |
112 | ||
021a1e78 LP |
113 | *ret = r; |
114 | return 0; | |
115 | } | |
116 | ||
117 | int sd_bus_set_address(sd_bus *bus, const char *address) { | |
118 | char *a; | |
119 | ||
120 | if (!bus) | |
121 | return -EINVAL; | |
122 | if (bus->state != BUS_UNSET) | |
123 | return -EPERM; | |
124 | if (!address) | |
125 | return -EINVAL; | |
126 | ||
127 | a = strdup(address); | |
128 | if (!a) | |
129 | return -ENOMEM; | |
130 | ||
131 | free(bus->address); | |
132 | bus->address = a; | |
133 | ||
134 | return 0; | |
135 | } | |
136 | ||
137 | int sd_bus_set_fd(sd_bus *bus, int fd) { | |
138 | if (!bus) | |
139 | return -EINVAL; | |
140 | if (bus->state != BUS_UNSET) | |
141 | return -EPERM; | |
142 | if (fd < 0) | |
143 | return -EINVAL; | |
144 | ||
145 | bus->fd = fd; | |
146 | return 0; | |
147 | } | |
148 | ||
2fd9ae2e LP |
149 | int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
150 | char *p, **a; | |
151 | ||
152 | if (!bus) | |
153 | return -EINVAL; | |
154 | if (bus->state != BUS_UNSET) | |
155 | return -EPERM; | |
156 | if (!path) | |
157 | return -EINVAL; | |
158 | if (strv_isempty(argv)) | |
159 | return -EINVAL; | |
160 | ||
161 | p = strdup(path); | |
162 | if (!p) | |
163 | return -ENOMEM; | |
164 | ||
165 | a = strv_copy(argv); | |
166 | if (!a) { | |
167 | free(p); | |
168 | return -ENOMEM; | |
169 | } | |
170 | ||
171 | free(bus->exec_path); | |
172 | strv_free(bus->exec_argv); | |
173 | ||
174 | bus->exec_path = p; | |
175 | bus->exec_argv = a; | |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
94bbf1ba | 180 | int sd_bus_set_bus_client(sd_bus *bus, int b) { |
021a1e78 LP |
181 | if (!bus) |
182 | return -EINVAL; | |
183 | if (bus->state != BUS_UNSET) | |
184 | return -EPERM; | |
185 | ||
94bbf1ba | 186 | bus->bus_client = !!b; |
021a1e78 LP |
187 | return 0; |
188 | } | |
189 | ||
190 | int sd_bus_set_negotiate_fds(sd_bus *bus, int b) { | |
191 | if (!bus) | |
192 | return -EINVAL; | |
193 | if (bus->state != BUS_UNSET) | |
194 | return -EPERM; | |
195 | ||
196 | bus->negotiate_fds = !!b; | |
197 | return 0; | |
198 | } | |
de1c301e | 199 | |
e3017af9 | 200 | static int hello_callback(sd_bus *bus, int error, sd_bus_message *reply, void *userdata) { |
de1c301e LP |
201 | const char *s; |
202 | int r; | |
203 | ||
204 | assert(bus); | |
021a1e78 | 205 | assert(bus->state == BUS_HELLO); |
e3017af9 LP |
206 | |
207 | if (error != 0) | |
208 | return -error; | |
209 | ||
de1c301e LP |
210 | assert(reply); |
211 | ||
de1c301e LP |
212 | r = sd_bus_message_read(reply, "s", &s); |
213 | if (r < 0) | |
214 | return r; | |
215 | ||
dafb7591 LP |
216 | if (!service_name_is_valid(s) || s[0] != ':') |
217 | return -EBADMSG; | |
218 | ||
de1c301e LP |
219 | bus->unique_name = strdup(s); |
220 | if (!bus->unique_name) | |
221 | return -ENOMEM; | |
222 | ||
dafb7591 LP |
223 | bus->state = BUS_RUNNING; |
224 | ||
de1c301e LP |
225 | return 1; |
226 | } | |
227 | ||
228 | static int bus_send_hello(sd_bus *bus) { | |
229 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
230 | int r; | |
231 | ||
232 | assert(bus); | |
233 | ||
94bbf1ba | 234 | if (!bus->bus_client) |
021a1e78 LP |
235 | return 0; |
236 | ||
de1c301e LP |
237 | r = sd_bus_message_new_method_call( |
238 | bus, | |
239 | "org.freedesktop.DBus", | |
240 | "/", | |
241 | "org.freedesktop.DBus", | |
242 | "Hello", | |
243 | &m); | |
244 | if (r < 0) | |
245 | return r; | |
246 | ||
e3017af9 | 247 | r = sd_bus_send_with_reply(bus, m, hello_callback, NULL, 0, NULL); |
de1c301e LP |
248 | if (r < 0) |
249 | return r; | |
250 | ||
89ffcd2a | 251 | return r; |
de1c301e LP |
252 | } |
253 | ||
a7e3212d | 254 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
255 | assert(bus); |
256 | ||
94bbf1ba | 257 | if (bus->bus_client) { |
de1c301e | 258 | bus->state = BUS_HELLO; |
e3017af9 | 259 | return 1; |
de1c301e LP |
260 | } |
261 | ||
262 | bus->state = BUS_RUNNING; | |
e3017af9 | 263 | return 1; |
de1c301e LP |
264 | } |
265 | ||
266 | static int parse_address_key(const char **p, const char *key, char **value) { | |
267 | size_t l, n = 0; | |
268 | const char *a; | |
269 | char *r = NULL; | |
270 | ||
271 | assert(p); | |
272 | assert(*p); | |
de1c301e LP |
273 | assert(value); |
274 | ||
2fd9ae2e LP |
275 | if (key) { |
276 | l = strlen(key); | |
277 | if (strncmp(*p, key, l) != 0) | |
278 | return 0; | |
de1c301e | 279 | |
2fd9ae2e LP |
280 | if ((*p)[l] != '=') |
281 | return 0; | |
de1c301e | 282 | |
2fd9ae2e LP |
283 | if (*value) |
284 | return -EINVAL; | |
de1c301e | 285 | |
2fd9ae2e LP |
286 | a = *p + l + 1; |
287 | } else | |
288 | a = *p; | |
289 | ||
290 | while (*a != ';' && *a != ',' && *a != 0) { | |
de1c301e LP |
291 | char c, *t; |
292 | ||
293 | if (*a == '%') { | |
294 | int x, y; | |
295 | ||
296 | x = unhexchar(a[1]); | |
297 | if (x < 0) { | |
298 | free(r); | |
299 | return x; | |
300 | } | |
301 | ||
302 | y = unhexchar(a[2]); | |
303 | if (y < 0) { | |
304 | free(r); | |
305 | return y; | |
306 | } | |
307 | ||
de1c301e | 308 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
309 | a += 3; |
310 | } else { | |
de1c301e | 311 | c = *a; |
89ffcd2a LP |
312 | a++; |
313 | } | |
de1c301e | 314 | |
89ffcd2a | 315 | t = realloc(r, n + 2); |
de1c301e LP |
316 | if (!t) { |
317 | free(r); | |
318 | return -ENOMEM; | |
319 | } | |
320 | ||
321 | r = t; | |
322 | r[n++] = c; | |
323 | } | |
324 | ||
89ffcd2a LP |
325 | if (!r) { |
326 | r = strdup(""); | |
327 | if (!r) | |
328 | return -ENOMEM; | |
329 | } else | |
330 | r[n] = 0; | |
331 | ||
332 | if (*a == ',') | |
333 | a++; | |
334 | ||
de1c301e | 335 | *p = a; |
2fd9ae2e LP |
336 | |
337 | free(*value); | |
de1c301e | 338 | *value = r; |
2fd9ae2e | 339 | |
de1c301e LP |
340 | return 1; |
341 | } | |
342 | ||
343 | static void skip_address_key(const char **p) { | |
344 | assert(p); | |
345 | assert(*p); | |
346 | ||
89ffcd2a LP |
347 | *p += strcspn(*p, ","); |
348 | ||
349 | if (**p == ',') | |
350 | (*p) ++; | |
de1c301e LP |
351 | } |
352 | ||
2fd9ae2e LP |
353 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
354 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
355 | size_t l; | |
de1c301e LP |
356 | int r; |
357 | ||
358 | assert(b); | |
2fd9ae2e LP |
359 | assert(p); |
360 | assert(*p); | |
361 | assert(guid); | |
de1c301e | 362 | |
2fd9ae2e LP |
363 | while (**p != 0 && **p != ';') { |
364 | r = parse_address_key(p, "guid", guid); | |
365 | if (r < 0) | |
366 | return r; | |
367 | else if (r > 0) | |
368 | continue; | |
de1c301e | 369 | |
2fd9ae2e LP |
370 | r = parse_address_key(p, "path", &path); |
371 | if (r < 0) | |
372 | return r; | |
373 | else if (r > 0) | |
374 | continue; | |
de1c301e | 375 | |
2fd9ae2e LP |
376 | r = parse_address_key(p, "abstract", &abstract); |
377 | if (r < 0) | |
378 | return r; | |
379 | else if (r > 0) | |
380 | continue; | |
de1c301e | 381 | |
2fd9ae2e LP |
382 | skip_address_key(p); |
383 | } | |
de1c301e | 384 | |
2fd9ae2e LP |
385 | if (!path && !abstract) |
386 | return -EINVAL; | |
de1c301e | 387 | |
2fd9ae2e LP |
388 | if (path && abstract) |
389 | return -EINVAL; | |
390 | ||
391 | if (path) { | |
392 | l = strlen(path); | |
393 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
394 | return -E2BIG; | |
de1c301e | 395 | |
2fd9ae2e LP |
396 | b->sockaddr.un.sun_family = AF_UNIX; |
397 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
398 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
399 | } else if (abstract) { | |
400 | l = strlen(abstract); | |
401 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
402 | return -E2BIG; | |
403 | ||
404 | b->sockaddr.un.sun_family = AF_UNIX; | |
405 | b->sockaddr.un.sun_path[0] = 0; | |
406 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
407 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
408 | } | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
413 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
414 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
415 | struct addrinfo hints, *result; | |
416 | int r; | |
417 | ||
418 | assert(b); | |
419 | assert(p); | |
420 | assert(*p); | |
421 | assert(guid); | |
422 | ||
423 | while (**p != 0 && **p != ';') { | |
424 | r = parse_address_key(p, "guid", guid); | |
425 | if (r < 0) | |
426 | return r; | |
427 | else if (r > 0) | |
428 | continue; | |
429 | ||
430 | r = parse_address_key(p, "host", &host); | |
431 | if (r < 0) | |
432 | return r; | |
433 | else if (r > 0) | |
434 | continue; | |
435 | ||
436 | r = parse_address_key(p, "port", &port); | |
437 | if (r < 0) | |
438 | return r; | |
439 | else if (r > 0) | |
440 | continue; | |
441 | ||
442 | r = parse_address_key(p, "family", &family); | |
443 | if (r < 0) | |
444 | return r; | |
445 | else if (r > 0) | |
446 | continue; | |
447 | ||
448 | skip_address_key(p); | |
449 | } | |
450 | ||
451 | if (!host || !port) | |
452 | return -EINVAL; | |
453 | ||
454 | zero(hints); | |
455 | hints.ai_socktype = SOCK_STREAM; | |
456 | hints.ai_flags = AI_ADDRCONFIG; | |
457 | ||
458 | if (family) { | |
459 | if (streq(family, "ipv4")) | |
460 | hints.ai_family = AF_INET; | |
461 | else if (streq(family, "ipv6")) | |
462 | hints.ai_family = AF_INET6; | |
463 | else | |
464 | return -EINVAL; | |
465 | } | |
466 | ||
467 | r = getaddrinfo(host, port, &hints, &result); | |
468 | if (r == EAI_SYSTEM) | |
469 | return -errno; | |
470 | else if (r != 0) | |
471 | return -EADDRNOTAVAIL; | |
472 | ||
473 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
474 | b->sockaddr_size = result->ai_addrlen; | |
475 | ||
476 | freeaddrinfo(result); | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
481 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
482 | char *path = NULL; | |
483 | unsigned n_argv = 0, j; | |
484 | char **argv = NULL; | |
485 | int r; | |
486 | ||
487 | assert(b); | |
488 | assert(p); | |
489 | assert(*p); | |
490 | assert(guid); | |
491 | ||
492 | while (**p != 0 && **p != ';') { | |
493 | r = parse_address_key(p, "guid", guid); | |
494 | if (r < 0) | |
495 | goto fail; | |
496 | else if (r > 0) | |
497 | continue; | |
498 | ||
499 | r = parse_address_key(p, "path", &path); | |
500 | if (r < 0) | |
501 | goto fail; | |
502 | else if (r > 0) | |
503 | continue; | |
504 | ||
505 | if (startswith(*p, "argv")) { | |
506 | unsigned ul; | |
507 | ||
508 | errno = 0; | |
509 | ul = strtoul(*p + 4, (char**) p, 10); | |
510 | if (errno != 0 || **p != '=' || ul > 256) { | |
511 | r = -EINVAL; | |
512 | goto fail; | |
513 | } | |
514 | ||
515 | (*p) ++; | |
516 | ||
517 | if (ul >= n_argv) { | |
518 | char **x; | |
519 | ||
520 | x = realloc(argv, sizeof(char*) * (ul + 2)); | |
521 | if (!x) { | |
522 | r = -ENOMEM; | |
523 | goto fail; | |
524 | } | |
525 | ||
526 | memset(x + n_argv, 0, sizeof(char*) * (ul - n_argv + 2)); | |
527 | ||
528 | argv = x; | |
529 | n_argv = ul + 1; | |
530 | } | |
531 | ||
532 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 533 | if (r < 0) |
2fd9ae2e | 534 | goto fail; |
de1c301e | 535 | |
2fd9ae2e | 536 | continue; |
de1c301e LP |
537 | } |
538 | ||
2fd9ae2e LP |
539 | skip_address_key(p); |
540 | } | |
de1c301e | 541 | |
5a0f6033 LP |
542 | if (!path) { |
543 | r = -EINVAL; | |
2fd9ae2e | 544 | goto fail; |
5a0f6033 | 545 | } |
de1c301e | 546 | |
2fd9ae2e LP |
547 | /* Make sure there are no holes in the array, with the |
548 | * exception of argv[0] */ | |
549 | for (j = 1; j < n_argv; j++) | |
550 | if (!argv[j]) { | |
551 | r = -EINVAL; | |
552 | goto fail; | |
553 | } | |
554 | ||
555 | if (argv && argv[0] == NULL) { | |
556 | argv[0] = strdup(path); | |
557 | if (!argv[0]) { | |
558 | r = -ENOMEM; | |
559 | goto fail; | |
560 | } | |
561 | } | |
de1c301e | 562 | |
2fd9ae2e LP |
563 | b->exec_path = path; |
564 | b->exec_argv = argv; | |
565 | return 0; | |
de1c301e | 566 | |
2fd9ae2e LP |
567 | fail: |
568 | for (j = 0; j < n_argv; j++) | |
569 | free(argv[j]); | |
570 | ||
571 | free(argv); | |
572 | free(path); | |
573 | return r; | |
574 | } | |
575 | ||
576 | static void bus_reset_parsed_address(sd_bus *b) { | |
577 | assert(b); | |
578 | ||
579 | zero(b->sockaddr); | |
580 | b->sockaddr_size = 0; | |
581 | strv_free(b->exec_argv); | |
582 | free(b->exec_path); | |
583 | b->exec_path = NULL; | |
584 | b->exec_argv = NULL; | |
585 | b->peer = SD_ID128_NULL; | |
586 | } | |
587 | ||
588 | static int bus_parse_next_address(sd_bus *b) { | |
589 | _cleanup_free_ char *guid = NULL; | |
590 | const char *a; | |
591 | int r; | |
592 | ||
593 | assert(b); | |
594 | ||
595 | if (!b->address) | |
596 | return 0; | |
597 | if (b->address[b->address_index] == 0) | |
598 | return 0; | |
599 | ||
600 | bus_reset_parsed_address(b); | |
601 | ||
602 | a = b->address + b->address_index; | |
de1c301e | 603 | |
2fd9ae2e | 604 | while (*a != 0) { |
de1c301e | 605 | |
2fd9ae2e LP |
606 | if (*a == ';') { |
607 | a++; | |
608 | continue; | |
de1c301e LP |
609 | } |
610 | ||
2fd9ae2e LP |
611 | if (startswith(a, "unix:")) { |
612 | a += 5; | |
de1c301e | 613 | |
2fd9ae2e | 614 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
615 | if (r < 0) |
616 | return r; | |
2fd9ae2e | 617 | break; |
de1c301e | 618 | |
2fd9ae2e | 619 | } else if (startswith(a, "tcp:")) { |
de1c301e | 620 | |
2fd9ae2e LP |
621 | a += 4; |
622 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
623 | if (r < 0) |
624 | return r; | |
de1c301e | 625 | |
2fd9ae2e LP |
626 | break; |
627 | ||
628 | } else if (startswith(a, "unixexec:")) { | |
629 | ||
630 | a += 9; | |
631 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
632 | if (r < 0) |
633 | return r; | |
de1c301e | 634 | |
2fd9ae2e | 635 | break; |
de1c301e | 636 | |
de1c301e LP |
637 | } |
638 | ||
2fd9ae2e LP |
639 | a = strchr(a, ';'); |
640 | if (!a) | |
641 | return 0; | |
de1c301e LP |
642 | } |
643 | ||
644 | if (guid) { | |
645 | r = sd_id128_from_string(guid, &b->peer); | |
646 | if (r < 0) | |
647 | return r; | |
648 | } | |
649 | ||
2fd9ae2e | 650 | b->address_index = a - b->address; |
de1c301e LP |
651 | return 1; |
652 | } | |
653 | ||
a7e3212d | 654 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
655 | int r; |
656 | ||
657 | assert(b); | |
658 | ||
659 | for (;;) { | |
2571ead1 LP |
660 | if (b->fd >= 0) { |
661 | close_nointr_nofail(b->fd); | |
662 | b->fd = -1; | |
663 | } | |
2fd9ae2e LP |
664 | |
665 | if (b->sockaddr.sa.sa_family != AF_UNSPEC) { | |
a7e3212d LP |
666 | |
667 | r = bus_socket_connect(b); | |
2fd9ae2e LP |
668 | if (r >= 0) |
669 | return r; | |
670 | ||
671 | b->last_connect_error = -r; | |
672 | ||
673 | } else if (b->exec_path) { | |
674 | ||
a7e3212d | 675 | r = bus_socket_exec(b); |
2fd9ae2e LP |
676 | if (r >= 0) |
677 | return r; | |
678 | ||
679 | b->last_connect_error = -r; | |
680 | } | |
681 | ||
682 | r = bus_parse_next_address(b); | |
683 | if (r < 0) | |
684 | return r; | |
685 | if (r == 0) | |
686 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
687 | } |
688 | } | |
689 | ||
a7e3212d LP |
690 | int bus_next_address(sd_bus *b) { |
691 | assert(b); | |
692 | ||
693 | bus_reset_parsed_address(b); | |
694 | return bus_start_address(b); | |
695 | } | |
696 | ||
021a1e78 LP |
697 | static int bus_start_fd(sd_bus *b) { |
698 | int r; | |
699 | ||
700 | assert(b); | |
701 | ||
702 | r = fd_nonblock(b->fd, true); | |
703 | if (r < 0) | |
704 | return r; | |
705 | ||
706 | r = fd_cloexec(b->fd, true); | |
707 | if (r < 0) | |
708 | return r; | |
709 | ||
a7e3212d | 710 | return bus_socket_take_fd(b); |
021a1e78 LP |
711 | } |
712 | ||
713 | int sd_bus_start(sd_bus *bus) { | |
714 | int r; | |
715 | ||
716 | if (!bus) | |
717 | return -EINVAL; | |
718 | if (bus->state != BUS_UNSET) | |
719 | return -EPERM; | |
720 | ||
721 | bus->state = BUS_OPENING; | |
722 | ||
723 | if (bus->fd >= 0) | |
724 | r = bus_start_fd(bus); | |
725 | else if (bus->address) | |
a7e3212d | 726 | r = bus_start_address(bus); |
021a1e78 LP |
727 | else |
728 | return -EINVAL; | |
729 | ||
730 | if (r < 0) | |
731 | return r; | |
732 | ||
733 | return bus_send_hello(bus); | |
734 | } | |
735 | ||
de1c301e LP |
736 | int sd_bus_open_system(sd_bus **ret) { |
737 | const char *e; | |
738 | sd_bus *b; | |
739 | int r; | |
740 | ||
741 | if (!ret) | |
742 | return -EINVAL; | |
743 | ||
021a1e78 LP |
744 | r = sd_bus_new(&b); |
745 | if (r < 0) | |
746 | return r; | |
747 | ||
de1c301e LP |
748 | e = getenv("DBUS_SYSTEM_BUS_ADDRESS"); |
749 | if (e) { | |
021a1e78 | 750 | r = sd_bus_set_address(b, e); |
de1c301e | 751 | if (r < 0) |
021a1e78 | 752 | goto fail; |
89ffcd2a | 753 | } else { |
89ffcd2a LP |
754 | b->sockaddr.un.sun_family = AF_UNIX; |
755 | strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); | |
756 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1; | |
89ffcd2a | 757 | } |
de1c301e | 758 | |
94bbf1ba | 759 | b->bus_client = true; |
021a1e78 LP |
760 | |
761 | r = sd_bus_start(b); | |
762 | if (r < 0) | |
763 | goto fail; | |
de1c301e LP |
764 | |
765 | *ret = b; | |
766 | return 0; | |
021a1e78 LP |
767 | |
768 | fail: | |
769 | bus_free(b); | |
770 | return r; | |
de1c301e LP |
771 | } |
772 | ||
773 | int sd_bus_open_user(sd_bus **ret) { | |
774 | const char *e; | |
775 | sd_bus *b; | |
776 | size_t l; | |
777 | int r; | |
778 | ||
779 | if (!ret) | |
780 | return -EINVAL; | |
781 | ||
021a1e78 LP |
782 | r = sd_bus_new(&b); |
783 | if (r < 0) | |
784 | return r; | |
785 | ||
de1c301e LP |
786 | e = getenv("DBUS_SESSION_BUS_ADDRESS"); |
787 | if (e) { | |
021a1e78 | 788 | r = sd_bus_set_address(b, e); |
de1c301e | 789 | if (r < 0) |
021a1e78 | 790 | goto fail; |
89ffcd2a LP |
791 | } else { |
792 | e = getenv("XDG_RUNTIME_DIR"); | |
021a1e78 LP |
793 | if (!e) { |
794 | r = -ENOENT; | |
795 | goto fail; | |
796 | } | |
de1c301e | 797 | |
89ffcd2a | 798 | l = strlen(e); |
021a1e78 LP |
799 | if (l + 4 > sizeof(b->sockaddr.un.sun_path)) { |
800 | r = -E2BIG; | |
801 | goto fail; | |
802 | } | |
de1c301e | 803 | |
89ffcd2a LP |
804 | b->sockaddr.un.sun_family = AF_UNIX; |
805 | memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4); | |
806 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4; | |
de1c301e LP |
807 | } |
808 | ||
94bbf1ba | 809 | b->bus_client = true; |
de1c301e | 810 | |
021a1e78 | 811 | r = sd_bus_start(b); |
2571ead1 LP |
812 | if (r < 0) |
813 | goto fail; | |
de1c301e LP |
814 | |
815 | *ret = b; | |
816 | return 0; | |
2571ead1 LP |
817 | |
818 | fail: | |
021a1e78 | 819 | bus_free(b); |
2571ead1 | 820 | return r; |
de1c301e LP |
821 | } |
822 | ||
823 | void sd_bus_close(sd_bus *bus) { | |
824 | if (!bus) | |
825 | return; | |
826 | if (bus->fd < 0) | |
827 | return; | |
828 | ||
829 | close_nointr_nofail(bus->fd); | |
830 | bus->fd = -1; | |
831 | } | |
832 | ||
833 | sd_bus *sd_bus_ref(sd_bus *bus) { | |
834 | if (!bus) | |
835 | return NULL; | |
836 | ||
837 | assert(bus->n_ref > 0); | |
838 | ||
839 | bus->n_ref++; | |
840 | return bus; | |
841 | } | |
842 | ||
843 | sd_bus *sd_bus_unref(sd_bus *bus) { | |
844 | if (!bus) | |
845 | return NULL; | |
846 | ||
847 | assert(bus->n_ref > 0); | |
848 | bus->n_ref--; | |
849 | ||
850 | if (bus->n_ref <= 0) | |
851 | bus_free(bus); | |
852 | ||
853 | return NULL; | |
854 | } | |
855 | ||
e3017af9 LP |
856 | int sd_bus_is_open(sd_bus *bus) { |
857 | if (!bus) | |
858 | return -EINVAL; | |
859 | ||
021a1e78 | 860 | return bus->state != BUS_UNSET && bus->fd >= 0; |
e3017af9 LP |
861 | } |
862 | ||
d728d708 LP |
863 | int sd_bus_can_send(sd_bus *bus, char type) { |
864 | int r; | |
865 | ||
de1c301e LP |
866 | if (!bus) |
867 | return -EINVAL; | |
021a1e78 LP |
868 | if (bus->fd < 0) |
869 | return -ENOTCONN; | |
de1c301e | 870 | |
d728d708 | 871 | if (type == SD_BUS_TYPE_UNIX_FD) { |
021a1e78 LP |
872 | if (!bus->negotiate_fds) |
873 | return 0; | |
874 | ||
20902f3e | 875 | r = bus_ensure_running(bus); |
d728d708 LP |
876 | if (r < 0) |
877 | return r; | |
de1c301e | 878 | |
d728d708 LP |
879 | return bus->can_fds; |
880 | } | |
881 | ||
882 | return bus_type_is_valid(type); | |
de1c301e LP |
883 | } |
884 | ||
d728d708 LP |
885 | int sd_bus_get_peer(sd_bus *bus, sd_id128_t *peer) { |
886 | int r; | |
de1c301e LP |
887 | |
888 | if (!bus) | |
889 | return -EINVAL; | |
d728d708 LP |
890 | if (!peer) |
891 | return -EINVAL; | |
de1c301e | 892 | |
20902f3e | 893 | r = bus_ensure_running(bus); |
d728d708 LP |
894 | if (r < 0) |
895 | return r; | |
de1c301e | 896 | |
d728d708 LP |
897 | *peer = bus->peer; |
898 | return 0; | |
de1c301e LP |
899 | } |
900 | ||
901 | static int bus_seal_message(sd_bus *b, sd_bus_message *m) { | |
902 | assert(m); | |
903 | ||
89ffcd2a LP |
904 | if (m->header->version > b->message_version) |
905 | return -EPERM; | |
906 | ||
de1c301e LP |
907 | if (m->sealed) |
908 | return 0; | |
909 | ||
9a17484d | 910 | return bus_message_seal(m, ++b->serial); |
de1c301e LP |
911 | } |
912 | ||
de1c301e | 913 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 914 | int r, ret = 0; |
de1c301e LP |
915 | |
916 | assert(bus); | |
89ffcd2a | 917 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e LP |
918 | |
919 | if (bus->fd < 0) | |
920 | return -ENOTCONN; | |
921 | ||
922 | while (bus->wqueue_size > 0) { | |
923 | ||
a7e3212d | 924 | r = bus_socket_write_message(bus, bus->wqueue[0], &bus->windex); |
de1c301e LP |
925 | if (r < 0) { |
926 | sd_bus_close(bus); | |
927 | return r; | |
928 | } else if (r == 0) | |
e3017af9 LP |
929 | /* Didn't do anything this time */ |
930 | return ret; | |
931 | else if (bus->windex >= bus->wqueue[0]->size) { | |
de1c301e LP |
932 | /* Fully written. Let's drop the entry from |
933 | * the queue. | |
934 | * | |
935 | * This isn't particularly optimized, but | |
936 | * well, this is supposed to be our worst-case | |
937 | * buffer only, and the socket buffer is | |
938 | * supposed to be our primary buffer, and if | |
939 | * it got full, then all bets are off | |
940 | * anyway. */ | |
941 | ||
942 | sd_bus_message_unref(bus->wqueue[0]); | |
943 | bus->wqueue_size --; | |
944 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); | |
945 | bus->windex = 0; | |
946 | ||
e3017af9 | 947 | ret = 1; |
de1c301e LP |
948 | } |
949 | } | |
950 | ||
e3017af9 | 951 | return ret; |
de1c301e LP |
952 | } |
953 | ||
954 | static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) { | |
2bf938c1 | 955 | sd_bus_message *z = NULL; |
e3017af9 | 956 | int r, ret = 0; |
de1c301e LP |
957 | |
958 | assert(bus); | |
959 | assert(m); | |
89ffcd2a | 960 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e LP |
961 | |
962 | if (bus->fd < 0) | |
963 | return -ENOTCONN; | |
964 | ||
965 | if (bus->rqueue_size > 0) { | |
966 | /* Dispatch a queued message */ | |
967 | ||
968 | *m = bus->rqueue[0]; | |
969 | bus->rqueue_size --; | |
970 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
971 | return 1; | |
972 | } | |
973 | ||
974 | /* Try to read a new message */ | |
e3017af9 | 975 | do { |
a7e3212d | 976 | r = bus_socket_read_message(bus, &z); |
e3017af9 LP |
977 | if (r < 0) { |
978 | sd_bus_close(bus); | |
979 | return r; | |
980 | } | |
981 | if (r == 0) | |
982 | return ret; | |
de1c301e | 983 | |
e3017af9 LP |
984 | r = 1; |
985 | } while (!z); | |
986 | ||
987 | *m = z; | |
988 | return 1; | |
de1c301e LP |
989 | } |
990 | ||
991 | int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) { | |
992 | int r; | |
993 | ||
994 | if (!bus) | |
995 | return -EINVAL; | |
021a1e78 LP |
996 | if (bus->state == BUS_UNSET) |
997 | return -ENOTCONN; | |
de1c301e LP |
998 | if (bus->fd < 0) |
999 | return -ENOTCONN; | |
1000 | if (!m) | |
1001 | return -EINVAL; | |
021a1e78 LP |
1002 | |
1003 | if (m->n_fds > 0) { | |
1004 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1005 | if (r < 0) | |
1006 | return r; | |
1007 | if (r == 0) | |
1008 | return -ENOTSUP; | |
1009 | } | |
de1c301e | 1010 | |
29f6aadd LP |
1011 | /* If the serial number isn't kept, then we know that no reply |
1012 | * is expected */ | |
1013 | if (!serial && !m->sealed) | |
1014 | m->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; | |
1015 | ||
de1c301e LP |
1016 | r = bus_seal_message(bus, m); |
1017 | if (r < 0) | |
1018 | return r; | |
1019 | ||
5407f2de LP |
1020 | /* If this is a reply and no reply was requested, then let's |
1021 | * suppress this, if we can */ | |
1022 | if (m->dont_send && !serial) | |
1023 | return 0; | |
1024 | ||
89ffcd2a | 1025 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1026 | size_t idx = 0; |
1027 | ||
a7e3212d | 1028 | r = bus_socket_write_message(bus, m, &idx); |
de1c301e LP |
1029 | if (r < 0) { |
1030 | sd_bus_close(bus); | |
1031 | return r; | |
e3017af9 | 1032 | } else if (idx < m->size) { |
de1c301e LP |
1033 | /* Wasn't fully written. So let's remember how |
1034 | * much was written. Note that the first entry | |
1035 | * of the wqueue array is always allocated so | |
1036 | * that we always can remember how much was | |
1037 | * written. */ | |
1038 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1039 | bus->wqueue_size = 1; | |
1040 | bus->windex = idx; | |
1041 | } | |
1042 | } else { | |
1043 | sd_bus_message **q; | |
1044 | ||
1045 | /* Just append it to the queue. */ | |
1046 | ||
25220239 | 1047 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1048 | return -ENOBUFS; |
1049 | ||
1050 | q = realloc(bus->wqueue, sizeof(sd_bus_message*) * (bus->wqueue_size + 1)); | |
1051 | if (!q) | |
1052 | return -ENOMEM; | |
1053 | ||
1054 | bus->wqueue = q; | |
1055 | q[bus->wqueue_size ++] = sd_bus_message_ref(m); | |
1056 | } | |
1057 | ||
1058 | if (serial) | |
1059 | *serial = BUS_MESSAGE_SERIAL(m); | |
1060 | ||
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | static usec_t calc_elapse(uint64_t usec) { | |
1065 | if (usec == (uint64_t) -1) | |
1066 | return 0; | |
1067 | ||
1068 | if (usec == 0) | |
e3017af9 | 1069 | usec = BUS_DEFAULT_TIMEOUT; |
de1c301e LP |
1070 | |
1071 | return now(CLOCK_MONOTONIC) + usec; | |
1072 | } | |
1073 | ||
e3017af9 LP |
1074 | static int timeout_compare(const void *a, const void *b) { |
1075 | const struct reply_callback *x = a, *y = b; | |
1076 | ||
1077 | if (x->timeout != 0 && y->timeout == 0) | |
1078 | return -1; | |
1079 | ||
1080 | if (x->timeout == 0 && y->timeout != 0) | |
1081 | return 1; | |
1082 | ||
1083 | if (x->timeout < y->timeout) | |
1084 | return -1; | |
1085 | ||
1086 | if (x->timeout > y->timeout) | |
1087 | return 1; | |
1088 | ||
1089 | return 0; | |
1090 | } | |
1091 | ||
de1c301e LP |
1092 | int sd_bus_send_with_reply( |
1093 | sd_bus *bus, | |
1094 | sd_bus_message *m, | |
1095 | sd_message_handler_t callback, | |
1096 | void *userdata, | |
1097 | uint64_t usec, | |
1098 | uint64_t *serial) { | |
1099 | ||
1100 | struct reply_callback *c; | |
1101 | int r; | |
1102 | ||
1103 | if (!bus) | |
1104 | return -EINVAL; | |
021a1e78 LP |
1105 | if (bus->state == BUS_UNSET) |
1106 | return -ENOTCONN; | |
89ffcd2a | 1107 | if (bus->fd < 0) |
de1c301e LP |
1108 | return -ENOTCONN; |
1109 | if (!m) | |
1110 | return -EINVAL; | |
1111 | if (!callback) | |
1112 | return -EINVAL; | |
89ffcd2a | 1113 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) |
de1c301e | 1114 | return -EINVAL; |
89ffcd2a LP |
1115 | if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) |
1116 | return -EINVAL; | |
1117 | ||
1118 | r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func); | |
1119 | if (r < 0) | |
1120 | return r; | |
de1c301e | 1121 | |
e3017af9 LP |
1122 | if (usec != (uint64_t) -1) { |
1123 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); | |
1124 | if (r < 0) | |
1125 | return r; | |
1126 | } | |
1127 | ||
de1c301e LP |
1128 | r = bus_seal_message(bus, m); |
1129 | if (r < 0) | |
1130 | return r; | |
1131 | ||
1132 | c = new(struct reply_callback, 1); | |
1133 | if (!c) | |
1134 | return -ENOMEM; | |
1135 | ||
1136 | c->callback = callback; | |
1137 | c->userdata = userdata; | |
1138 | c->serial = BUS_MESSAGE_SERIAL(m); | |
1139 | c->timeout = calc_elapse(usec); | |
1140 | ||
1141 | r = hashmap_put(bus->reply_callbacks, &c->serial, c); | |
1142 | if (r < 0) { | |
1143 | free(c); | |
1144 | return r; | |
1145 | } | |
1146 | ||
e3017af9 LP |
1147 | if (c->timeout != 0) { |
1148 | r = prioq_put(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1149 | if (r < 0) { | |
1150 | c->timeout = 0; | |
1151 | sd_bus_send_with_reply_cancel(bus, c->serial); | |
1152 | return r; | |
1153 | } | |
1154 | } | |
1155 | ||
de1c301e LP |
1156 | r = sd_bus_send(bus, m, serial); |
1157 | if (r < 0) { | |
e3017af9 | 1158 | sd_bus_send_with_reply_cancel(bus, c->serial); |
de1c301e LP |
1159 | return r; |
1160 | } | |
1161 | ||
1162 | return r; | |
1163 | } | |
1164 | ||
1165 | int sd_bus_send_with_reply_cancel(sd_bus *bus, uint64_t serial) { | |
e3017af9 | 1166 | struct reply_callback *c; |
de1c301e LP |
1167 | |
1168 | if (!bus) | |
1169 | return -EINVAL; | |
1170 | if (serial == 0) | |
1171 | return -EINVAL; | |
1172 | ||
1173 | c = hashmap_remove(bus->reply_callbacks, &serial); | |
1174 | if (!c) | |
1175 | return 0; | |
1176 | ||
e3017af9 LP |
1177 | if (c->timeout != 0) |
1178 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1179 | ||
de1c301e LP |
1180 | free(c); |
1181 | return 1; | |
1182 | } | |
1183 | ||
20902f3e | 1184 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1185 | int r; |
1186 | ||
1187 | assert(bus); | |
1188 | ||
021a1e78 LP |
1189 | if (bus->fd < 0) |
1190 | return -ENOTCONN; | |
1191 | if (bus->state == BUS_UNSET) | |
1192 | return -ENOTCONN; | |
1193 | ||
d728d708 LP |
1194 | if (bus->state == BUS_RUNNING) |
1195 | return 1; | |
89ffcd2a LP |
1196 | |
1197 | for (;;) { | |
1198 | r = sd_bus_process(bus, NULL); | |
1199 | if (r < 0) | |
1200 | return r; | |
d728d708 LP |
1201 | if (bus->state == BUS_RUNNING) |
1202 | return 1; | |
e3017af9 LP |
1203 | if (r > 0) |
1204 | continue; | |
89ffcd2a LP |
1205 | |
1206 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1207 | if (r < 0) | |
1208 | return r; | |
1209 | } | |
1210 | } | |
1211 | ||
de1c301e LP |
1212 | int sd_bus_send_with_reply_and_block( |
1213 | sd_bus *bus, | |
1214 | sd_bus_message *m, | |
1215 | uint64_t usec, | |
1216 | sd_bus_error *error, | |
1217 | sd_bus_message **reply) { | |
1218 | ||
1219 | int r; | |
1220 | usec_t timeout; | |
1221 | uint64_t serial; | |
1222 | bool room = false; | |
1223 | ||
1224 | if (!bus) | |
1225 | return -EINVAL; | |
89ffcd2a | 1226 | if (bus->fd < 0) |
de1c301e | 1227 | return -ENOTCONN; |
021a1e78 LP |
1228 | if (bus->state == BUS_UNSET) |
1229 | return -ENOTCONN; | |
de1c301e LP |
1230 | if (!m) |
1231 | return -EINVAL; | |
89ffcd2a | 1232 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) |
de1c301e | 1233 | return -EINVAL; |
89ffcd2a | 1234 | if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) |
de1c301e | 1235 | return -EINVAL; |
89ffcd2a LP |
1236 | if (bus_error_is_dirty(error)) |
1237 | return -EINVAL; | |
1238 | ||
20902f3e | 1239 | r = bus_ensure_running(bus); |
89ffcd2a LP |
1240 | if (r < 0) |
1241 | return r; | |
de1c301e LP |
1242 | |
1243 | r = sd_bus_send(bus, m, &serial); | |
1244 | if (r < 0) | |
1245 | return r; | |
1246 | ||
1247 | timeout = calc_elapse(usec); | |
1248 | ||
1249 | for (;;) { | |
1250 | usec_t left; | |
e3017af9 | 1251 | sd_bus_message *incoming = NULL; |
de1c301e LP |
1252 | |
1253 | if (!room) { | |
1254 | sd_bus_message **q; | |
1255 | ||
25220239 LP |
1256 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
1257 | return -ENOBUFS; | |
1258 | ||
de1c301e LP |
1259 | /* Make sure there's room for queuing this |
1260 | * locally, before we read the message */ | |
1261 | ||
1262 | q = realloc(bus->rqueue, (bus->rqueue_size + 1) * sizeof(sd_bus_message*)); | |
1263 | if (!q) | |
1264 | return -ENOMEM; | |
1265 | ||
1266 | bus->rqueue = q; | |
1267 | room = true; | |
1268 | } | |
1269 | ||
a7e3212d | 1270 | r = bus_socket_read_message(bus, &incoming); |
de1c301e LP |
1271 | if (r < 0) |
1272 | return r; | |
e3017af9 | 1273 | if (incoming) { |
89ffcd2a | 1274 | |
de1c301e LP |
1275 | if (incoming->reply_serial == serial) { |
1276 | /* Found a match! */ | |
1277 | ||
1278 | if (incoming->header->type == SD_BUS_MESSAGE_TYPE_METHOD_RETURN) { | |
1279 | *reply = incoming; | |
1280 | return 0; | |
1281 | } | |
1282 | ||
1283 | if (incoming->header->type == SD_BUS_MESSAGE_TYPE_METHOD_ERROR) { | |
1284 | int k; | |
1285 | ||
1286 | r = sd_bus_error_copy(error, &incoming->error); | |
1287 | if (r < 0) { | |
1288 | sd_bus_message_unref(incoming); | |
1289 | return r; | |
1290 | } | |
1291 | ||
1292 | k = bus_error_to_errno(&incoming->error); | |
1293 | sd_bus_message_unref(incoming); | |
1294 | return k; | |
1295 | } | |
1296 | ||
1297 | sd_bus_message_unref(incoming); | |
1298 | return -EIO; | |
1299 | } | |
1300 | ||
1301 | /* There's already guaranteed to be room for | |
1302 | * this, so need to resize things here */ | |
1303 | bus->rqueue[bus->rqueue_size ++] = incoming; | |
1304 | room = false; | |
1305 | ||
1306 | /* Try to read more, right-away */ | |
1307 | continue; | |
1308 | } | |
e3017af9 LP |
1309 | if (r != 0) |
1310 | continue; | |
de1c301e LP |
1311 | |
1312 | if (timeout > 0) { | |
1313 | usec_t n; | |
1314 | ||
1315 | n = now(CLOCK_MONOTONIC); | |
1316 | if (n >= timeout) | |
1317 | return -ETIMEDOUT; | |
1318 | ||
1319 | left = timeout - n; | |
1320 | } else | |
1321 | left = (uint64_t) -1; | |
1322 | ||
e3017af9 | 1323 | r = bus_poll(bus, true, left); |
de1c301e LP |
1324 | if (r < 0) |
1325 | return r; | |
1326 | ||
1327 | r = dispatch_wqueue(bus); | |
1328 | if (r < 0) | |
1329 | return r; | |
1330 | } | |
1331 | } | |
1332 | ||
1333 | int sd_bus_get_fd(sd_bus *bus) { | |
1334 | if (!bus) | |
1335 | return -EINVAL; | |
1336 | ||
1337 | if (bus->fd < 0) | |
89ffcd2a | 1338 | return -ENOTCONN; |
de1c301e LP |
1339 | |
1340 | return bus->fd; | |
1341 | } | |
1342 | ||
1343 | int sd_bus_get_events(sd_bus *bus) { | |
1344 | int flags = 0; | |
1345 | ||
1346 | if (!bus) | |
1347 | return -EINVAL; | |
021a1e78 LP |
1348 | if (bus->state == BUS_UNSET) |
1349 | return -ENOTCONN; | |
de1c301e | 1350 | if (bus->fd < 0) |
89ffcd2a | 1351 | return -ENOTCONN; |
de1c301e LP |
1352 | |
1353 | if (bus->state == BUS_OPENING) | |
1354 | flags |= POLLOUT; | |
89ffcd2a LP |
1355 | else if (bus->state == BUS_AUTHENTICATING) { |
1356 | ||
1357 | if (bus->auth_index < ELEMENTSOF(bus->auth_iovec)) | |
1358 | flags |= POLLOUT; | |
1359 | ||
1360 | flags |= POLLIN; | |
1361 | ||
1362 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
1363 | if (bus->rqueue_size <= 0) |
1364 | flags |= POLLIN; | |
1365 | if (bus->wqueue_size > 0) | |
1366 | flags |= POLLOUT; | |
1367 | } | |
1368 | ||
1369 | return flags; | |
1370 | } | |
1371 | ||
e3017af9 LP |
1372 | int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
1373 | struct reply_callback *c; | |
1374 | ||
1375 | if (!bus) | |
1376 | return -EINVAL; | |
1377 | if (!timeout_usec) | |
1378 | return -EINVAL; | |
021a1e78 LP |
1379 | if (bus->state == BUS_UNSET) |
1380 | return -ENOTCONN; | |
e3017af9 LP |
1381 | if (bus->fd < 0) |
1382 | return -ENOTCONN; | |
1383 | ||
1384 | if (bus->state == BUS_AUTHENTICATING) { | |
1385 | *timeout_usec = bus->auth_timeout; | |
1386 | return 1; | |
1387 | } | |
1388 | ||
1389 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) | |
1390 | return 0; | |
1391 | ||
1392 | c = prioq_peek(bus->reply_callbacks_prioq); | |
1393 | if (!c) | |
1394 | return 0; | |
1395 | ||
1396 | *timeout_usec = c->timeout; | |
1397 | return 1; | |
1398 | } | |
1399 | ||
1400 | static int process_timeout(sd_bus *bus) { | |
e3017af9 LP |
1401 | struct reply_callback *c; |
1402 | usec_t n; | |
1403 | int r; | |
1404 | ||
1405 | assert(bus); | |
1406 | ||
1407 | c = prioq_peek(bus->reply_callbacks_prioq); | |
1408 | if (!c) | |
1409 | return 0; | |
1410 | ||
1411 | n = now(CLOCK_MONOTONIC); | |
1412 | if (c->timeout > n) | |
1413 | return 0; | |
1414 | ||
1415 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); | |
1416 | hashmap_remove(bus->reply_callbacks, &c->serial); | |
1417 | ||
1418 | r = c->callback(bus, ETIMEDOUT, NULL, c->userdata); | |
1419 | free(c); | |
1420 | ||
1421 | return r < 0 ? r : 1; | |
1422 | } | |
1423 | ||
a652755d LP |
1424 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
1425 | struct reply_callback *c; | |
1426 | int r; | |
1427 | ||
1428 | assert(bus); | |
1429 | assert(m); | |
1430 | ||
1431 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_RETURN && | |
1432 | m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_ERROR) | |
1433 | return 0; | |
1434 | ||
1435 | c = hashmap_remove(bus->reply_callbacks, &m->reply_serial); | |
1436 | if (!c) | |
1437 | return 0; | |
1438 | ||
1439 | if (c->timeout != 0) | |
1440 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1441 | ||
1442 | r = c->callback(bus, 0, m, c->userdata); | |
1443 | free(c); | |
1444 | ||
1445 | return r; | |
1446 | } | |
1447 | ||
1448 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
1449 | struct filter_callback *l; | |
1450 | int r; | |
1451 | ||
1452 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1453 | r = l->callback(bus, 0, m, l->userdata); | |
1454 | if (r != 0) | |
1455 | return r; | |
1456 | } | |
1457 | ||
1458 | return 0; | |
1459 | } | |
1460 | ||
b9bf7e2b LP |
1461 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
1462 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
1463 | int r; | |
1464 | ||
1465 | assert(bus); | |
1466 | assert(m); | |
1467 | ||
1468 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) | |
1469 | return 0; | |
1470 | ||
1471 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
1472 | return 0; | |
1473 | ||
1474 | if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) | |
1475 | return 1; | |
1476 | ||
1477 | if (streq_ptr(m->member, "Ping")) | |
1478 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1479 | else if (streq_ptr(m->member, "GetMachineId")) { | |
1480 | sd_id128_t id; | |
1481 | char sid[33]; | |
1482 | ||
1483 | r = sd_id128_get_machine(&id); | |
1484 | if (r < 0) | |
1485 | return r; | |
1486 | ||
1487 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1488 | if (r < 0) | |
1489 | return r; | |
1490 | ||
1491 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
1492 | } else { | |
1493 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_INIT; | |
1494 | ||
1495 | sd_bus_error_set(&error, | |
1496 | "org.freedesktop.DBus.Error.UnknownMethod", | |
1497 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); | |
1498 | ||
1499 | r = sd_bus_message_new_method_error(bus, m, &error, &reply); | |
1500 | } | |
1501 | ||
1502 | if (r < 0) | |
1503 | return r; | |
1504 | ||
1505 | r = sd_bus_send(bus, reply, NULL); | |
1506 | if (r < 0) | |
1507 | return r; | |
1508 | ||
1509 | return 1; | |
1510 | } | |
1511 | ||
a652755d LP |
1512 | static int process_object(sd_bus *bus, sd_bus_message *m) { |
1513 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_INIT; | |
1514 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
1515 | struct object_callback *c; | |
1516 | char *p; | |
e3017af9 | 1517 | int r; |
a652755d | 1518 | bool found = false; |
e3017af9 LP |
1519 | |
1520 | assert(bus); | |
1521 | assert(m); | |
1522 | ||
a652755d LP |
1523 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) |
1524 | return 0; | |
e3017af9 | 1525 | |
a652755d LP |
1526 | if (hashmap_isempty(bus->object_callbacks)) |
1527 | return 0; | |
e3017af9 | 1528 | |
a652755d LP |
1529 | c = hashmap_get(bus->object_callbacks, m->path); |
1530 | if (c) { | |
1531 | r = c->callback(bus, 0, m, c->userdata); | |
1532 | if (r != 0) | |
1533 | return r; | |
1534 | ||
1535 | found = true; | |
1536 | } | |
e3017af9 | 1537 | |
a652755d LP |
1538 | /* Look for fallback prefixes */ |
1539 | p = strdupa(m->path); | |
1540 | for (;;) { | |
1541 | char *e; | |
1542 | ||
1543 | e = strrchr(p, '/'); | |
1544 | if (e == p || !e) | |
1545 | break; | |
1546 | ||
1547 | *e = 0; | |
1548 | ||
1549 | c = hashmap_get(bus->object_callbacks, p); | |
1550 | if (c && c->is_fallback) { | |
1551 | r = c->callback(bus, 0, m, c->userdata); | |
e3017af9 LP |
1552 | if (r != 0) |
1553 | return r; | |
a652755d LP |
1554 | |
1555 | found = true; | |
e3017af9 LP |
1556 | } |
1557 | } | |
1558 | ||
0a72c2bd LP |
1559 | /* We found some handlers but none wanted to take this, then |
1560 | * return this -- with one exception, we can handle | |
1561 | * introspection minimally ourselves */ | |
1562 | if (!found || sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) | |
a652755d LP |
1563 | return 0; |
1564 | ||
1565 | sd_bus_error_set(&error, | |
1566 | "org.freedesktop.DBus.Error.UnknownMethod", | |
1567 | "Unknown method '%s' or interface '%s'.", m->member, m->interface); | |
1568 | ||
1569 | r = sd_bus_message_new_method_error(bus, m, &error, &reply); | |
1570 | if (r < 0) | |
1571 | return r; | |
1572 | ||
1573 | r = sd_bus_send(bus, reply, NULL); | |
1574 | if (r < 0) | |
1575 | return r; | |
e3017af9 | 1576 | |
a652755d LP |
1577 | return 1; |
1578 | } | |
1579 | ||
0a72c2bd LP |
1580 | static int process_introspect(sd_bus *bus, sd_bus_message *m) { |
1581 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
1582 | _cleanup_free_ char *introspection = NULL; | |
1583 | _cleanup_set_free_free_ Set *s = NULL; | |
1584 | _cleanup_fclose_ FILE *f = NULL; | |
1585 | struct object_callback *c; | |
1586 | Iterator i; | |
1587 | size_t size = 0; | |
1588 | char *node; | |
1589 | int r; | |
1590 | ||
1591 | assert(bus); | |
1592 | assert(m); | |
1593 | ||
1594 | if (!sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) | |
1595 | return 0; | |
1596 | ||
1597 | if (!m->path) | |
1598 | return 0; | |
1599 | ||
1600 | s = set_new(string_hash_func, string_compare_func); | |
1601 | if (!s) | |
1602 | return -ENOMEM; | |
1603 | ||
1604 | HASHMAP_FOREACH(c, bus->object_callbacks, i) { | |
1605 | const char *e; | |
1606 | char *a, *p; | |
1607 | ||
1608 | if (streq(c->path, "/")) | |
1609 | continue; | |
1610 | ||
1611 | if (streq(m->path, "/")) | |
1612 | e = c->path; | |
1613 | else { | |
1614 | e = startswith(c->path, m->path); | |
1615 | if (!e || *e != '/') | |
1616 | continue; | |
1617 | } | |
1618 | ||
1619 | a = strdup(e+1); | |
1620 | if (!a) | |
1621 | return -ENOMEM; | |
1622 | ||
1623 | p = strchr(a, '/'); | |
1624 | if (p) | |
1625 | *p = 0; | |
1626 | ||
1627 | r = set_put(s, a); | |
1628 | if (r < 0) { | |
1629 | free(a); | |
1630 | ||
1631 | if (r != -EEXIST) | |
1632 | return r; | |
1633 | } | |
1634 | } | |
1635 | ||
1636 | f = open_memstream(&introspection, &size); | |
1637 | if (!f) | |
1638 | return -ENOMEM; | |
1639 | ||
1640 | fputs(SD_BUS_INTROSPECT_DOCTYPE, f); | |
1641 | fputs("<node>\n", f); | |
1642 | fputs(SD_BUS_INTROSPECT_INTERFACE_PEER, f); | |
1643 | fputs(SD_BUS_INTROSPECT_INTERFACE_INTROSPECTABLE, f); | |
1644 | ||
1645 | while ((node = set_steal_first(s))) { | |
1646 | fprintf(f, " <node name=\"%s\"/>\n", node); | |
1647 | free(node); | |
1648 | } | |
1649 | ||
1650 | fputs("</node>\n", f); | |
1651 | ||
1652 | fflush(f); | |
1653 | ||
1654 | if (ferror(f)) | |
1655 | return -ENOMEM; | |
1656 | ||
1657 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1658 | if (r < 0) | |
1659 | return r; | |
1660 | ||
1661 | r = sd_bus_message_append(reply, "s", introspection); | |
1662 | if (r < 0) | |
1663 | return r; | |
1664 | ||
1665 | r = sd_bus_send(bus, reply, NULL); | |
1666 | if (r < 0) | |
1667 | return r; | |
1668 | ||
1669 | return 1; | |
1670 | } | |
1671 | ||
a652755d LP |
1672 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
1673 | int r; | |
1674 | ||
1675 | assert(bus); | |
1676 | assert(m); | |
1677 | ||
1678 | r = process_reply(bus, m); | |
1679 | if (r != 0) | |
1680 | return r; | |
1681 | ||
1682 | r = process_filter(bus, m); | |
1683 | if (r != 0) | |
1684 | return r; | |
1685 | ||
1686 | r = process_builtin(bus, m); | |
1687 | if (r != 0) | |
1688 | return r; | |
1689 | ||
0a72c2bd LP |
1690 | r = process_object(bus, m); |
1691 | if (r != 0) | |
1692 | return r; | |
1693 | ||
1694 | return process_introspect(bus, m); | |
e3017af9 LP |
1695 | } |
1696 | ||
a7e3212d LP |
1697 | static int process_running(sd_bus *bus, sd_bus_message **ret) { |
1698 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
de1c301e LP |
1699 | int r; |
1700 | ||
a7e3212d LP |
1701 | assert(bus); |
1702 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); | |
de1c301e | 1703 | |
a7e3212d LP |
1704 | r = process_timeout(bus); |
1705 | if (r != 0) | |
1706 | goto null_message; | |
de1c301e | 1707 | |
a7e3212d LP |
1708 | r = dispatch_wqueue(bus); |
1709 | if (r != 0) | |
1710 | goto null_message; | |
de1c301e | 1711 | |
a7e3212d LP |
1712 | r = dispatch_rqueue(bus, &m); |
1713 | if (r < 0) | |
1714 | return r; | |
1715 | if (!m) | |
1716 | goto null_message; | |
de1c301e | 1717 | |
a7e3212d LP |
1718 | r = process_message(bus, m); |
1719 | if (r != 0) | |
1720 | goto null_message; | |
de1c301e | 1721 | |
a7e3212d LP |
1722 | if (ret) { |
1723 | *ret = m; | |
1724 | m = NULL; | |
1725 | return 1; | |
1726 | } | |
de1c301e | 1727 | |
a7e3212d LP |
1728 | if (m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_CALL) { |
1729 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
1730 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_INIT; | |
de1c301e | 1731 | |
a7e3212d | 1732 | sd_bus_error_set(&error, "org.freedesktop.DBus.Error.UnknownObject", "Unknown object '%s'.", m->path); |
de1c301e | 1733 | |
a7e3212d LP |
1734 | r = sd_bus_message_new_method_error(bus, m, &error, &reply); |
1735 | if (r < 0) | |
1736 | return r; | |
de1c301e | 1737 | |
a7e3212d LP |
1738 | r = sd_bus_send(bus, reply, NULL); |
1739 | if (r < 0) | |
1740 | return r; | |
1741 | } | |
e3017af9 | 1742 | |
a7e3212d | 1743 | return 1; |
de1c301e | 1744 | |
a7e3212d LP |
1745 | null_message: |
1746 | if (r >= 0 && ret) | |
1747 | *ret = NULL; | |
de1c301e | 1748 | |
a7e3212d LP |
1749 | return r; |
1750 | } | |
e3017af9 | 1751 | |
a7e3212d LP |
1752 | int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
1753 | int r; | |
de1c301e | 1754 | |
a7e3212d LP |
1755 | /* Returns 0 when we didn't do anything. This should cause the |
1756 | * caller to invoke sd_bus_wait() before returning the next | |
1757 | * time. Returns > 0 when we did something, which possibly | |
1758 | * means *ret is filled in with an unprocessed message. */ | |
de1c301e | 1759 | |
a7e3212d LP |
1760 | if (!bus) |
1761 | return -EINVAL; | |
1762 | if (bus->fd < 0) | |
1763 | return -ENOTCONN; | |
de1c301e | 1764 | |
a7e3212d | 1765 | switch (bus->state) { |
de1c301e | 1766 | |
a7e3212d LP |
1767 | case BUS_UNSET: |
1768 | return -ENOTCONN; | |
de1c301e | 1769 | |
a7e3212d LP |
1770 | case BUS_OPENING: |
1771 | r = bus_socket_process_opening(bus); | |
1772 | if (r < 0) | |
1773 | return r; | |
1774 | if (ret) | |
1775 | *ret = NULL; | |
1776 | return r; | |
b9bf7e2b | 1777 | |
a7e3212d | 1778 | case BUS_AUTHENTICATING: |
89ffcd2a | 1779 | |
a7e3212d LP |
1780 | r = bus_socket_process_authenticating(bus); |
1781 | if (r < 0) | |
1782 | return r; | |
1783 | if (ret) | |
1784 | *ret = NULL; | |
1785 | return r; | |
89ffcd2a | 1786 | |
a7e3212d LP |
1787 | case BUS_RUNNING: |
1788 | case BUS_HELLO: | |
89ffcd2a | 1789 | |
a7e3212d | 1790 | return process_running(bus, ret); |
de1c301e LP |
1791 | } |
1792 | ||
89ffcd2a | 1793 | assert_not_reached("Unknown state"); |
de1c301e LP |
1794 | } |
1795 | ||
e3017af9 | 1796 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
de1c301e LP |
1797 | struct pollfd p; |
1798 | int r, e; | |
1799 | struct timespec ts; | |
e3017af9 LP |
1800 | usec_t until, m; |
1801 | ||
1802 | assert(bus); | |
de1c301e | 1803 | |
de1c301e | 1804 | if (bus->fd < 0) |
89ffcd2a LP |
1805 | return -ENOTCONN; |
1806 | ||
de1c301e LP |
1807 | e = sd_bus_get_events(bus); |
1808 | if (e < 0) | |
1809 | return e; | |
1810 | ||
e3017af9 LP |
1811 | if (need_more) |
1812 | e |= POLLIN; | |
1813 | ||
1814 | r = sd_bus_get_timeout(bus, &until); | |
1815 | if (r < 0) | |
1816 | return r; | |
1817 | if (r == 0) | |
1818 | m = (uint64_t) -1; | |
1819 | else { | |
1820 | usec_t n; | |
1821 | n = now(CLOCK_MONOTONIC); | |
1822 | m = until > n ? until - n : 0; | |
1823 | } | |
1824 | ||
1825 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) | |
1826 | m = timeout_usec; | |
1827 | ||
de1c301e LP |
1828 | zero(p); |
1829 | p.fd = bus->fd; | |
1830 | p.events = e; | |
1831 | ||
e3017af9 | 1832 | r = ppoll(&p, 1, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
de1c301e | 1833 | if (r < 0) |
89ffcd2a | 1834 | return -errno; |
de1c301e | 1835 | |
e3017af9 LP |
1836 | return r > 0 ? 1 : 0; |
1837 | } | |
1838 | ||
1839 | int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { | |
1840 | ||
1841 | if (!bus) | |
1842 | return -EINVAL; | |
021a1e78 LP |
1843 | if (bus->state == BUS_UNSET) |
1844 | return -ENOTCONN; | |
e3017af9 LP |
1845 | if (bus->fd < 0) |
1846 | return -ENOTCONN; | |
1847 | if (bus->rqueue_size > 0) | |
1848 | return 0; | |
1849 | ||
1850 | return bus_poll(bus, false, timeout_usec); | |
de1c301e LP |
1851 | } |
1852 | ||
1853 | int sd_bus_flush(sd_bus *bus) { | |
1854 | int r; | |
1855 | ||
1856 | if (!bus) | |
1857 | return -EINVAL; | |
021a1e78 LP |
1858 | if (bus->state == BUS_UNSET) |
1859 | return -ENOTCONN; | |
de1c301e LP |
1860 | if (bus->fd < 0) |
1861 | return -ENOTCONN; | |
1862 | ||
20902f3e | 1863 | r = bus_ensure_running(bus); |
89ffcd2a LP |
1864 | if (r < 0) |
1865 | return r; | |
1866 | ||
1867 | if (bus->wqueue_size <= 0) | |
de1c301e LP |
1868 | return 0; |
1869 | ||
1870 | for (;;) { | |
1871 | r = dispatch_wqueue(bus); | |
1872 | if (r < 0) | |
1873 | return r; | |
1874 | ||
89ffcd2a | 1875 | if (bus->wqueue_size <= 0) |
de1c301e LP |
1876 | return 0; |
1877 | ||
e3017af9 | 1878 | r = bus_poll(bus, false, (uint64_t) -1); |
de1c301e LP |
1879 | if (r < 0) |
1880 | return r; | |
1881 | } | |
1882 | } | |
1883 | ||
1884 | int sd_bus_add_filter(sd_bus *bus, sd_message_handler_t callback, void *userdata) { | |
1885 | struct filter_callback *f; | |
1886 | ||
1887 | if (!bus) | |
1888 | return -EINVAL; | |
1889 | if (!callback) | |
1890 | return -EINVAL; | |
1891 | ||
1892 | f = new(struct filter_callback, 1); | |
1893 | if (!f) | |
1894 | return -ENOMEM; | |
1895 | f->callback = callback; | |
1896 | f->userdata = userdata; | |
1897 | ||
1898 | LIST_PREPEND(struct filter_callback, callbacks, bus->filter_callbacks, f); | |
1899 | return 0; | |
1900 | } | |
1901 | ||
1902 | int sd_bus_remove_filter(sd_bus *bus, sd_message_handler_t callback, void *userdata) { | |
1903 | struct filter_callback *f; | |
1904 | ||
1905 | if (!bus) | |
1906 | return -EINVAL; | |
1907 | if (!callback) | |
1908 | return -EINVAL; | |
1909 | ||
1910 | LIST_FOREACH(callbacks, f, bus->filter_callbacks) { | |
1911 | if (f->callback == callback && f->userdata == userdata) { | |
1912 | LIST_REMOVE(struct filter_callback, callbacks, bus->filter_callbacks, f); | |
1913 | free(f); | |
1914 | return 1; | |
1915 | } | |
1916 | } | |
1917 | ||
1918 | return 0; | |
1919 | } | |
a652755d LP |
1920 | |
1921 | static int bus_add_object( | |
1922 | sd_bus *bus, | |
1923 | bool fallback, | |
1924 | const char *path, | |
1925 | sd_message_handler_t callback, | |
1926 | void *userdata) { | |
1927 | ||
1928 | struct object_callback *c; | |
1929 | int r; | |
1930 | ||
1931 | if (!bus) | |
1932 | return -EINVAL; | |
1933 | if (!path) | |
1934 | return -EINVAL; | |
1935 | if (!callback) | |
1936 | return -EINVAL; | |
1937 | ||
1938 | r = hashmap_ensure_allocated(&bus->object_callbacks, string_hash_func, string_compare_func); | |
1939 | if (r < 0) | |
1940 | return r; | |
1941 | ||
1942 | c = new(struct object_callback, 1); | |
1943 | if (!c) | |
1944 | return -ENOMEM; | |
1945 | ||
1946 | c->path = strdup(path); | |
531991b6 | 1947 | if (!c->path) { |
a652755d LP |
1948 | free(c); |
1949 | return -ENOMEM; | |
1950 | } | |
1951 | ||
1952 | c->callback = callback; | |
1953 | c->userdata = userdata; | |
1954 | c->is_fallback = fallback; | |
1955 | ||
1956 | r = hashmap_put(bus->object_callbacks, c->path, c); | |
1957 | if (r < 0) { | |
1958 | free(c->path); | |
1959 | free(c); | |
1960 | return r; | |
1961 | } | |
1962 | ||
1963 | return 0; | |
1964 | } | |
1965 | ||
1966 | static int bus_remove_object( | |
1967 | sd_bus *bus, | |
1968 | bool fallback, | |
1969 | const char *path, | |
1970 | sd_message_handler_t callback, | |
1971 | void *userdata) { | |
1972 | ||
1973 | struct object_callback *c; | |
1974 | ||
1975 | if (!bus) | |
1976 | return -EINVAL; | |
1977 | if (!path) | |
1978 | return -EINVAL; | |
1979 | if (!callback) | |
1980 | return -EINVAL; | |
1981 | ||
1982 | c = hashmap_get(bus->object_callbacks, path); | |
1983 | if (!c) | |
1984 | return 0; | |
1985 | ||
1986 | if (c->callback != callback || c->userdata != userdata || c->is_fallback != fallback) | |
1987 | return 0; | |
1988 | ||
1989 | assert_se(c == hashmap_remove(bus->object_callbacks, c->path)); | |
1990 | ||
1991 | free(c->path); | |
1992 | free(c); | |
1993 | ||
1994 | return 1; | |
1995 | } | |
1996 | ||
1997 | int sd_bus_add_object(sd_bus *bus, const char *path, sd_message_handler_t callback, void *userdata) { | |
1998 | return bus_add_object(bus, false, path, callback, userdata); | |
1999 | } | |
2000 | ||
2001 | int sd_bus_remove_object(sd_bus *bus, const char *path, sd_message_handler_t callback, void *userdata) { | |
2002 | return bus_remove_object(bus, false, path, callback, userdata); | |
2003 | } | |
2004 | ||
2005 | int sd_bus_add_fallback(sd_bus *bus, const char *prefix, sd_message_handler_t callback, void *userdata) { | |
2006 | return bus_add_object(bus, true, prefix, callback, userdata); | |
2007 | } | |
2008 | ||
2009 | int sd_bus_remove_fallback(sd_bus *bus, const char *prefix, sd_message_handler_t callback, void *userdata) { | |
2010 | return bus_remove_object(bus, true, prefix, callback, userdata); | |
2011 | } |