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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" |
6629161f | 40 | #include "bus-kernel.h" |
392d5b37 | 41 | #include "bus-control.h" |
de1c301e | 42 | |
e3017af9 LP |
43 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
44 | ||
de1c301e LP |
45 | static void bus_free(sd_bus *b) { |
46 | struct filter_callback *f; | |
a652755d | 47 | struct object_callback *c; |
89ffcd2a | 48 | unsigned i; |
de1c301e LP |
49 | |
50 | assert(b); | |
51 | ||
e82c9509 | 52 | sd_bus_close(b); |
de1c301e LP |
53 | |
54 | free(b->rbuffer); | |
89ffcd2a | 55 | free(b->unique_name); |
2181a7f5 | 56 | free(b->auth_buffer); |
89ffcd2a | 57 | free(b->address); |
e9a967f9 | 58 | free(b->kernel); |
89ffcd2a | 59 | |
2fd9ae2e LP |
60 | free(b->exec_path); |
61 | strv_free(b->exec_argv); | |
62 | ||
2c93b4ef LP |
63 | close_many(b->fds, b->n_fds); |
64 | free(b->fds); | |
65 | ||
89ffcd2a LP |
66 | for (i = 0; i < b->rqueue_size; i++) |
67 | sd_bus_message_unref(b->rqueue[i]); | |
de1c301e | 68 | free(b->rqueue); |
89ffcd2a LP |
69 | |
70 | for (i = 0; i < b->wqueue_size; i++) | |
71 | sd_bus_message_unref(b->wqueue[i]); | |
de1c301e | 72 | free(b->wqueue); |
de1c301e LP |
73 | |
74 | hashmap_free_free(b->reply_callbacks); | |
e3017af9 | 75 | prioq_free(b->reply_callbacks_prioq); |
de1c301e LP |
76 | |
77 | while ((f = b->filter_callbacks)) { | |
78 | LIST_REMOVE(struct filter_callback, callbacks, b->filter_callbacks, f); | |
79 | free(f); | |
80 | } | |
81 | ||
a652755d LP |
82 | while ((c = hashmap_steal_first(b->object_callbacks))) { |
83 | free(c->path); | |
84 | free(c); | |
85 | } | |
86 | ||
87 | hashmap_free(b->object_callbacks); | |
88 | ||
392d5b37 LP |
89 | bus_match_free(&b->match_callbacks); |
90 | ||
de1c301e LP |
91 | free(b); |
92 | } | |
93 | ||
021a1e78 | 94 | int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
95 | sd_bus *r; |
96 | ||
021a1e78 LP |
97 | if (!ret) |
98 | return -EINVAL; | |
99 | ||
de1c301e LP |
100 | r = new0(sd_bus, 1); |
101 | if (!r) | |
021a1e78 | 102 | return -ENOMEM; |
de1c301e LP |
103 | |
104 | r->n_ref = 1; | |
e82c9509 | 105 | r->input_fd = r->output_fd = -1; |
de1c301e | 106 | r->message_version = 1; |
021a1e78 | 107 | r->negotiate_fds = true; |
de1c301e LP |
108 | |
109 | /* We guarantee that wqueue always has space for at least one | |
110 | * entry */ | |
111 | r->wqueue = new(sd_bus_message*, 1); | |
112 | if (!r->wqueue) { | |
113 | free(r); | |
021a1e78 | 114 | return -ENOMEM; |
de1c301e LP |
115 | } |
116 | ||
021a1e78 LP |
117 | *ret = r; |
118 | return 0; | |
119 | } | |
120 | ||
121 | int sd_bus_set_address(sd_bus *bus, const char *address) { | |
122 | char *a; | |
123 | ||
124 | if (!bus) | |
125 | return -EINVAL; | |
126 | if (bus->state != BUS_UNSET) | |
127 | return -EPERM; | |
128 | if (!address) | |
129 | return -EINVAL; | |
130 | ||
131 | a = strdup(address); | |
132 | if (!a) | |
133 | return -ENOMEM; | |
134 | ||
135 | free(bus->address); | |
136 | bus->address = a; | |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
e82c9509 | 141 | int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
021a1e78 LP |
142 | if (!bus) |
143 | return -EINVAL; | |
144 | if (bus->state != BUS_UNSET) | |
145 | return -EPERM; | |
e82c9509 LP |
146 | if (input_fd < 0) |
147 | return -EINVAL; | |
148 | if (output_fd < 0) | |
021a1e78 LP |
149 | return -EINVAL; |
150 | ||
e82c9509 LP |
151 | bus->input_fd = input_fd; |
152 | bus->output_fd = output_fd; | |
021a1e78 LP |
153 | return 0; |
154 | } | |
155 | ||
2fd9ae2e LP |
156 | int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
157 | char *p, **a; | |
158 | ||
159 | if (!bus) | |
160 | return -EINVAL; | |
161 | if (bus->state != BUS_UNSET) | |
162 | return -EPERM; | |
163 | if (!path) | |
164 | return -EINVAL; | |
165 | if (strv_isempty(argv)) | |
166 | return -EINVAL; | |
167 | ||
168 | p = strdup(path); | |
169 | if (!p) | |
170 | return -ENOMEM; | |
171 | ||
172 | a = strv_copy(argv); | |
173 | if (!a) { | |
174 | free(p); | |
175 | return -ENOMEM; | |
176 | } | |
177 | ||
178 | free(bus->exec_path); | |
179 | strv_free(bus->exec_argv); | |
180 | ||
181 | bus->exec_path = p; | |
182 | bus->exec_argv = a; | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
94bbf1ba | 187 | int sd_bus_set_bus_client(sd_bus *bus, int b) { |
021a1e78 LP |
188 | if (!bus) |
189 | return -EINVAL; | |
190 | if (bus->state != BUS_UNSET) | |
191 | return -EPERM; | |
192 | ||
94bbf1ba | 193 | bus->bus_client = !!b; |
021a1e78 LP |
194 | return 0; |
195 | } | |
196 | ||
197 | int sd_bus_set_negotiate_fds(sd_bus *bus, int b) { | |
198 | if (!bus) | |
199 | return -EINVAL; | |
200 | if (bus->state != BUS_UNSET) | |
201 | return -EPERM; | |
202 | ||
203 | bus->negotiate_fds = !!b; | |
204 | return 0; | |
205 | } | |
de1c301e | 206 | |
98178d39 | 207 | int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
2181a7f5 LP |
208 | if (!bus) |
209 | return -EINVAL; | |
98178d39 | 210 | if (!b && !sd_id128_equal(server_id, SD_ID128_NULL)) |
2181a7f5 LP |
211 | return -EINVAL; |
212 | if (bus->state != BUS_UNSET) | |
213 | return -EPERM; | |
214 | ||
215 | bus->is_server = !!b; | |
98178d39 | 216 | bus->server_id = server_id; |
2181a7f5 LP |
217 | return 0; |
218 | } | |
219 | ||
220 | int sd_bus_set_anonymous(sd_bus *bus, int b) { | |
221 | if (!bus) | |
222 | return -EINVAL; | |
223 | if (bus->state != BUS_UNSET) | |
224 | return -EPERM; | |
225 | ||
226 | bus->anonymous_auth = !!b; | |
227 | return 0; | |
228 | } | |
229 | ||
e3017af9 | 230 | static int hello_callback(sd_bus *bus, int error, sd_bus_message *reply, void *userdata) { |
de1c301e LP |
231 | const char *s; |
232 | int r; | |
233 | ||
234 | assert(bus); | |
021a1e78 | 235 | assert(bus->state == BUS_HELLO); |
e3017af9 LP |
236 | |
237 | if (error != 0) | |
238 | return -error; | |
239 | ||
de1c301e LP |
240 | assert(reply); |
241 | ||
de1c301e LP |
242 | r = sd_bus_message_read(reply, "s", &s); |
243 | if (r < 0) | |
244 | return r; | |
245 | ||
dafb7591 LP |
246 | if (!service_name_is_valid(s) || s[0] != ':') |
247 | return -EBADMSG; | |
248 | ||
de1c301e LP |
249 | bus->unique_name = strdup(s); |
250 | if (!bus->unique_name) | |
251 | return -ENOMEM; | |
252 | ||
dafb7591 LP |
253 | bus->state = BUS_RUNNING; |
254 | ||
de1c301e LP |
255 | return 1; |
256 | } | |
257 | ||
258 | static int bus_send_hello(sd_bus *bus) { | |
259 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
260 | int r; | |
261 | ||
262 | assert(bus); | |
263 | ||
6629161f | 264 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
265 | return 0; |
266 | ||
de1c301e LP |
267 | r = sd_bus_message_new_method_call( |
268 | bus, | |
269 | "org.freedesktop.DBus", | |
270 | "/", | |
271 | "org.freedesktop.DBus", | |
272 | "Hello", | |
273 | &m); | |
274 | if (r < 0) | |
275 | return r; | |
276 | ||
9d373862 | 277 | return sd_bus_send_with_reply(bus, m, hello_callback, NULL, 0, &bus->hello_serial); |
de1c301e LP |
278 | } |
279 | ||
a7e3212d | 280 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
281 | assert(bus); |
282 | ||
f08838da | 283 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 284 | bus->state = BUS_HELLO; |
e3017af9 | 285 | return 1; |
de1c301e LP |
286 | } |
287 | ||
288 | bus->state = BUS_RUNNING; | |
e3017af9 | 289 | return 1; |
de1c301e LP |
290 | } |
291 | ||
292 | static int parse_address_key(const char **p, const char *key, char **value) { | |
293 | size_t l, n = 0; | |
294 | const char *a; | |
295 | char *r = NULL; | |
296 | ||
297 | assert(p); | |
298 | assert(*p); | |
de1c301e LP |
299 | assert(value); |
300 | ||
2fd9ae2e LP |
301 | if (key) { |
302 | l = strlen(key); | |
303 | if (strncmp(*p, key, l) != 0) | |
304 | return 0; | |
de1c301e | 305 | |
2fd9ae2e LP |
306 | if ((*p)[l] != '=') |
307 | return 0; | |
de1c301e | 308 | |
2fd9ae2e LP |
309 | if (*value) |
310 | return -EINVAL; | |
de1c301e | 311 | |
2fd9ae2e LP |
312 | a = *p + l + 1; |
313 | } else | |
314 | a = *p; | |
315 | ||
316 | while (*a != ';' && *a != ',' && *a != 0) { | |
de1c301e LP |
317 | char c, *t; |
318 | ||
319 | if (*a == '%') { | |
320 | int x, y; | |
321 | ||
322 | x = unhexchar(a[1]); | |
323 | if (x < 0) { | |
324 | free(r); | |
325 | return x; | |
326 | } | |
327 | ||
328 | y = unhexchar(a[2]); | |
329 | if (y < 0) { | |
330 | free(r); | |
331 | return y; | |
332 | } | |
333 | ||
de1c301e | 334 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
335 | a += 3; |
336 | } else { | |
de1c301e | 337 | c = *a; |
89ffcd2a LP |
338 | a++; |
339 | } | |
de1c301e | 340 | |
89ffcd2a | 341 | t = realloc(r, n + 2); |
de1c301e LP |
342 | if (!t) { |
343 | free(r); | |
344 | return -ENOMEM; | |
345 | } | |
346 | ||
347 | r = t; | |
348 | r[n++] = c; | |
349 | } | |
350 | ||
89ffcd2a LP |
351 | if (!r) { |
352 | r = strdup(""); | |
353 | if (!r) | |
354 | return -ENOMEM; | |
355 | } else | |
356 | r[n] = 0; | |
357 | ||
358 | if (*a == ',') | |
359 | a++; | |
360 | ||
de1c301e | 361 | *p = a; |
2fd9ae2e LP |
362 | |
363 | free(*value); | |
de1c301e | 364 | *value = r; |
2fd9ae2e | 365 | |
de1c301e LP |
366 | return 1; |
367 | } | |
368 | ||
369 | static void skip_address_key(const char **p) { | |
370 | assert(p); | |
371 | assert(*p); | |
372 | ||
89ffcd2a LP |
373 | *p += strcspn(*p, ","); |
374 | ||
375 | if (**p == ',') | |
376 | (*p) ++; | |
de1c301e LP |
377 | } |
378 | ||
2fd9ae2e LP |
379 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
380 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
381 | size_t l; | |
de1c301e LP |
382 | int r; |
383 | ||
384 | assert(b); | |
2fd9ae2e LP |
385 | assert(p); |
386 | assert(*p); | |
387 | assert(guid); | |
de1c301e | 388 | |
2fd9ae2e LP |
389 | while (**p != 0 && **p != ';') { |
390 | r = parse_address_key(p, "guid", guid); | |
391 | if (r < 0) | |
392 | return r; | |
393 | else if (r > 0) | |
394 | continue; | |
de1c301e | 395 | |
2fd9ae2e LP |
396 | r = parse_address_key(p, "path", &path); |
397 | if (r < 0) | |
398 | return r; | |
399 | else if (r > 0) | |
400 | continue; | |
de1c301e | 401 | |
2fd9ae2e LP |
402 | r = parse_address_key(p, "abstract", &abstract); |
403 | if (r < 0) | |
404 | return r; | |
405 | else if (r > 0) | |
406 | continue; | |
de1c301e | 407 | |
2fd9ae2e LP |
408 | skip_address_key(p); |
409 | } | |
de1c301e | 410 | |
2fd9ae2e LP |
411 | if (!path && !abstract) |
412 | return -EINVAL; | |
de1c301e | 413 | |
2fd9ae2e LP |
414 | if (path && abstract) |
415 | return -EINVAL; | |
416 | ||
417 | if (path) { | |
418 | l = strlen(path); | |
419 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
420 | return -E2BIG; | |
de1c301e | 421 | |
2fd9ae2e LP |
422 | b->sockaddr.un.sun_family = AF_UNIX; |
423 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
424 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
425 | } else if (abstract) { | |
426 | l = strlen(abstract); | |
427 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
428 | return -E2BIG; | |
429 | ||
430 | b->sockaddr.un.sun_family = AF_UNIX; | |
431 | b->sockaddr.un.sun_path[0] = 0; | |
432 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
433 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
434 | } | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
439 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
440 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 441 | int r; |
b92bea5d ZJS |
442 | struct addrinfo *result, hints = { |
443 | .ai_socktype = SOCK_STREAM, | |
444 | .ai_flags = AI_ADDRCONFIG, | |
445 | }; | |
2fd9ae2e LP |
446 | |
447 | assert(b); | |
448 | assert(p); | |
449 | assert(*p); | |
450 | assert(guid); | |
451 | ||
452 | while (**p != 0 && **p != ';') { | |
453 | r = parse_address_key(p, "guid", guid); | |
454 | if (r < 0) | |
455 | return r; | |
456 | else if (r > 0) | |
457 | continue; | |
458 | ||
459 | r = parse_address_key(p, "host", &host); | |
460 | if (r < 0) | |
461 | return r; | |
462 | else if (r > 0) | |
463 | continue; | |
464 | ||
465 | r = parse_address_key(p, "port", &port); | |
466 | if (r < 0) | |
467 | return r; | |
468 | else if (r > 0) | |
469 | continue; | |
470 | ||
471 | r = parse_address_key(p, "family", &family); | |
472 | if (r < 0) | |
473 | return r; | |
474 | else if (r > 0) | |
475 | continue; | |
476 | ||
477 | skip_address_key(p); | |
478 | } | |
479 | ||
480 | if (!host || !port) | |
481 | return -EINVAL; | |
482 | ||
2fd9ae2e LP |
483 | if (family) { |
484 | if (streq(family, "ipv4")) | |
485 | hints.ai_family = AF_INET; | |
486 | else if (streq(family, "ipv6")) | |
487 | hints.ai_family = AF_INET6; | |
488 | else | |
489 | return -EINVAL; | |
490 | } | |
491 | ||
492 | r = getaddrinfo(host, port, &hints, &result); | |
493 | if (r == EAI_SYSTEM) | |
494 | return -errno; | |
495 | else if (r != 0) | |
496 | return -EADDRNOTAVAIL; | |
497 | ||
498 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
499 | b->sockaddr_size = result->ai_addrlen; | |
500 | ||
501 | freeaddrinfo(result); | |
502 | ||
503 | return 0; | |
504 | } | |
505 | ||
506 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
507 | char *path = NULL; | |
508 | unsigned n_argv = 0, j; | |
509 | char **argv = NULL; | |
510 | int r; | |
511 | ||
512 | assert(b); | |
513 | assert(p); | |
514 | assert(*p); | |
515 | assert(guid); | |
516 | ||
517 | while (**p != 0 && **p != ';') { | |
518 | r = parse_address_key(p, "guid", guid); | |
519 | if (r < 0) | |
520 | goto fail; | |
521 | else if (r > 0) | |
522 | continue; | |
523 | ||
524 | r = parse_address_key(p, "path", &path); | |
525 | if (r < 0) | |
526 | goto fail; | |
527 | else if (r > 0) | |
528 | continue; | |
529 | ||
530 | if (startswith(*p, "argv")) { | |
531 | unsigned ul; | |
532 | ||
533 | errno = 0; | |
534 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 535 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
536 | r = -EINVAL; |
537 | goto fail; | |
538 | } | |
539 | ||
540 | (*p) ++; | |
541 | ||
542 | if (ul >= n_argv) { | |
543 | char **x; | |
544 | ||
545 | x = realloc(argv, sizeof(char*) * (ul + 2)); | |
546 | if (!x) { | |
547 | r = -ENOMEM; | |
548 | goto fail; | |
549 | } | |
550 | ||
551 | memset(x + n_argv, 0, sizeof(char*) * (ul - n_argv + 2)); | |
552 | ||
553 | argv = x; | |
554 | n_argv = ul + 1; | |
555 | } | |
556 | ||
557 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 558 | if (r < 0) |
2fd9ae2e | 559 | goto fail; |
de1c301e | 560 | |
2fd9ae2e | 561 | continue; |
de1c301e LP |
562 | } |
563 | ||
2fd9ae2e LP |
564 | skip_address_key(p); |
565 | } | |
de1c301e | 566 | |
5a0f6033 LP |
567 | if (!path) { |
568 | r = -EINVAL; | |
2fd9ae2e | 569 | goto fail; |
5a0f6033 | 570 | } |
de1c301e | 571 | |
2fd9ae2e LP |
572 | /* Make sure there are no holes in the array, with the |
573 | * exception of argv[0] */ | |
574 | for (j = 1; j < n_argv; j++) | |
575 | if (!argv[j]) { | |
576 | r = -EINVAL; | |
577 | goto fail; | |
578 | } | |
579 | ||
580 | if (argv && argv[0] == NULL) { | |
581 | argv[0] = strdup(path); | |
582 | if (!argv[0]) { | |
583 | r = -ENOMEM; | |
584 | goto fail; | |
585 | } | |
586 | } | |
de1c301e | 587 | |
2fd9ae2e LP |
588 | b->exec_path = path; |
589 | b->exec_argv = argv; | |
590 | return 0; | |
de1c301e | 591 | |
2fd9ae2e LP |
592 | fail: |
593 | for (j = 0; j < n_argv; j++) | |
594 | free(argv[j]); | |
595 | ||
596 | free(argv); | |
597 | free(path); | |
598 | return r; | |
599 | } | |
600 | ||
6629161f LP |
601 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
602 | _cleanup_free_ char *path = NULL; | |
603 | int r; | |
604 | ||
605 | assert(b); | |
606 | assert(p); | |
607 | assert(*p); | |
608 | assert(guid); | |
609 | ||
610 | while (**p != 0 && **p != ';') { | |
611 | r = parse_address_key(p, "guid", guid); | |
612 | if (r < 0) | |
613 | return r; | |
614 | else if (r > 0) | |
615 | continue; | |
616 | ||
617 | r = parse_address_key(p, "path", &path); | |
618 | if (r < 0) | |
619 | return r; | |
620 | else if (r > 0) | |
621 | continue; | |
622 | ||
623 | skip_address_key(p); | |
624 | } | |
625 | ||
626 | if (!path) | |
627 | return -EINVAL; | |
628 | ||
629 | free(b->kernel); | |
630 | b->kernel = path; | |
631 | path = NULL; | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
2fd9ae2e LP |
636 | static void bus_reset_parsed_address(sd_bus *b) { |
637 | assert(b); | |
638 | ||
639 | zero(b->sockaddr); | |
640 | b->sockaddr_size = 0; | |
641 | strv_free(b->exec_argv); | |
642 | free(b->exec_path); | |
643 | b->exec_path = NULL; | |
644 | b->exec_argv = NULL; | |
98178d39 | 645 | b->server_id = SD_ID128_NULL; |
6629161f LP |
646 | free(b->kernel); |
647 | b->kernel = NULL; | |
2fd9ae2e LP |
648 | } |
649 | ||
650 | static int bus_parse_next_address(sd_bus *b) { | |
651 | _cleanup_free_ char *guid = NULL; | |
652 | const char *a; | |
653 | int r; | |
654 | ||
655 | assert(b); | |
656 | ||
657 | if (!b->address) | |
658 | return 0; | |
659 | if (b->address[b->address_index] == 0) | |
660 | return 0; | |
661 | ||
662 | bus_reset_parsed_address(b); | |
663 | ||
664 | a = b->address + b->address_index; | |
de1c301e | 665 | |
2fd9ae2e | 666 | while (*a != 0) { |
de1c301e | 667 | |
2fd9ae2e LP |
668 | if (*a == ';') { |
669 | a++; | |
670 | continue; | |
de1c301e LP |
671 | } |
672 | ||
2fd9ae2e LP |
673 | if (startswith(a, "unix:")) { |
674 | a += 5; | |
de1c301e | 675 | |
2fd9ae2e | 676 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
677 | if (r < 0) |
678 | return r; | |
2fd9ae2e | 679 | break; |
de1c301e | 680 | |
2fd9ae2e | 681 | } else if (startswith(a, "tcp:")) { |
de1c301e | 682 | |
2fd9ae2e LP |
683 | a += 4; |
684 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
685 | if (r < 0) |
686 | return r; | |
de1c301e | 687 | |
2fd9ae2e LP |
688 | break; |
689 | ||
690 | } else if (startswith(a, "unixexec:")) { | |
691 | ||
692 | a += 9; | |
693 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
694 | if (r < 0) |
695 | return r; | |
de1c301e | 696 | |
2fd9ae2e | 697 | break; |
de1c301e | 698 | |
6629161f LP |
699 | } else if (startswith(a, "kernel:")) { |
700 | ||
701 | a += 7; | |
702 | r = parse_kernel_address(b, &a, &guid); | |
703 | if (r < 0) | |
704 | return r; | |
705 | ||
706 | break; | |
de1c301e LP |
707 | } |
708 | ||
2fd9ae2e LP |
709 | a = strchr(a, ';'); |
710 | if (!a) | |
711 | return 0; | |
de1c301e LP |
712 | } |
713 | ||
714 | if (guid) { | |
98178d39 | 715 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
716 | if (r < 0) |
717 | return r; | |
718 | } | |
719 | ||
2fd9ae2e | 720 | b->address_index = a - b->address; |
de1c301e LP |
721 | return 1; |
722 | } | |
723 | ||
a7e3212d | 724 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
725 | int r; |
726 | ||
727 | assert(b); | |
728 | ||
729 | for (;;) { | |
e82c9509 | 730 | sd_bus_close(b); |
2fd9ae2e LP |
731 | |
732 | if (b->sockaddr.sa.sa_family != AF_UNSPEC) { | |
a7e3212d LP |
733 | |
734 | r = bus_socket_connect(b); | |
2fd9ae2e LP |
735 | if (r >= 0) |
736 | return r; | |
737 | ||
738 | b->last_connect_error = -r; | |
739 | ||
740 | } else if (b->exec_path) { | |
741 | ||
a7e3212d | 742 | r = bus_socket_exec(b); |
2fd9ae2e LP |
743 | if (r >= 0) |
744 | return r; | |
745 | ||
6629161f LP |
746 | b->last_connect_error = -r; |
747 | } else if (b->kernel) { | |
748 | ||
749 | r = bus_kernel_connect(b); | |
750 | if (r >= 0) | |
751 | return r; | |
752 | ||
2fd9ae2e LP |
753 | b->last_connect_error = -r; |
754 | } | |
755 | ||
756 | r = bus_parse_next_address(b); | |
757 | if (r < 0) | |
758 | return r; | |
759 | if (r == 0) | |
760 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
761 | } |
762 | } | |
763 | ||
a7e3212d LP |
764 | int bus_next_address(sd_bus *b) { |
765 | assert(b); | |
766 | ||
767 | bus_reset_parsed_address(b); | |
768 | return bus_start_address(b); | |
769 | } | |
770 | ||
021a1e78 | 771 | static int bus_start_fd(sd_bus *b) { |
6629161f | 772 | struct stat st; |
021a1e78 LP |
773 | int r; |
774 | ||
775 | assert(b); | |
e82c9509 LP |
776 | assert(b->input_fd >= 0); |
777 | assert(b->output_fd >= 0); | |
021a1e78 | 778 | |
e82c9509 | 779 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
780 | if (r < 0) |
781 | return r; | |
782 | ||
e82c9509 | 783 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
784 | if (r < 0) |
785 | return r; | |
786 | ||
e82c9509 LP |
787 | if (b->input_fd != b->output_fd) { |
788 | r = fd_nonblock(b->output_fd, true); | |
789 | if (r < 0) | |
790 | return r; | |
791 | ||
792 | r = fd_cloexec(b->output_fd, true); | |
793 | if (r < 0) | |
794 | return r; | |
795 | } | |
796 | ||
6629161f LP |
797 | if (fstat(b->input_fd, &st) < 0) |
798 | return -errno; | |
799 | ||
800 | if (S_ISCHR(b->input_fd)) | |
801 | return bus_kernel_take_fd(b); | |
802 | else | |
803 | return bus_socket_take_fd(b); | |
021a1e78 LP |
804 | } |
805 | ||
806 | int sd_bus_start(sd_bus *bus) { | |
807 | int r; | |
808 | ||
809 | if (!bus) | |
810 | return -EINVAL; | |
811 | if (bus->state != BUS_UNSET) | |
812 | return -EPERM; | |
813 | ||
814 | bus->state = BUS_OPENING; | |
815 | ||
2181a7f5 LP |
816 | if (bus->is_server && bus->bus_client) |
817 | return -EINVAL; | |
818 | ||
e82c9509 | 819 | if (bus->input_fd >= 0) |
021a1e78 | 820 | r = bus_start_fd(bus); |
6629161f | 821 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel) |
a7e3212d | 822 | r = bus_start_address(bus); |
021a1e78 LP |
823 | else |
824 | return -EINVAL; | |
825 | ||
826 | if (r < 0) | |
827 | return r; | |
828 | ||
829 | return bus_send_hello(bus); | |
830 | } | |
831 | ||
de1c301e LP |
832 | int sd_bus_open_system(sd_bus **ret) { |
833 | const char *e; | |
834 | sd_bus *b; | |
835 | int r; | |
836 | ||
837 | if (!ret) | |
838 | return -EINVAL; | |
839 | ||
021a1e78 LP |
840 | r = sd_bus_new(&b); |
841 | if (r < 0) | |
842 | return r; | |
843 | ||
de1c301e LP |
844 | e = getenv("DBUS_SYSTEM_BUS_ADDRESS"); |
845 | if (e) { | |
021a1e78 | 846 | r = sd_bus_set_address(b, e); |
de1c301e | 847 | if (r < 0) |
021a1e78 | 848 | goto fail; |
89ffcd2a | 849 | } else { |
89ffcd2a LP |
850 | b->sockaddr.un.sun_family = AF_UNIX; |
851 | strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); | |
852 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1; | |
89ffcd2a | 853 | } |
de1c301e | 854 | |
94bbf1ba | 855 | b->bus_client = true; |
021a1e78 LP |
856 | |
857 | r = sd_bus_start(b); | |
858 | if (r < 0) | |
859 | goto fail; | |
de1c301e LP |
860 | |
861 | *ret = b; | |
862 | return 0; | |
021a1e78 LP |
863 | |
864 | fail: | |
865 | bus_free(b); | |
866 | return r; | |
de1c301e LP |
867 | } |
868 | ||
869 | int sd_bus_open_user(sd_bus **ret) { | |
870 | const char *e; | |
871 | sd_bus *b; | |
872 | size_t l; | |
873 | int r; | |
874 | ||
875 | if (!ret) | |
876 | return -EINVAL; | |
877 | ||
021a1e78 LP |
878 | r = sd_bus_new(&b); |
879 | if (r < 0) | |
880 | return r; | |
881 | ||
de1c301e LP |
882 | e = getenv("DBUS_SESSION_BUS_ADDRESS"); |
883 | if (e) { | |
021a1e78 | 884 | r = sd_bus_set_address(b, e); |
de1c301e | 885 | if (r < 0) |
021a1e78 | 886 | goto fail; |
89ffcd2a LP |
887 | } else { |
888 | e = getenv("XDG_RUNTIME_DIR"); | |
021a1e78 LP |
889 | if (!e) { |
890 | r = -ENOENT; | |
891 | goto fail; | |
892 | } | |
de1c301e | 893 | |
89ffcd2a | 894 | l = strlen(e); |
021a1e78 LP |
895 | if (l + 4 > sizeof(b->sockaddr.un.sun_path)) { |
896 | r = -E2BIG; | |
897 | goto fail; | |
898 | } | |
de1c301e | 899 | |
89ffcd2a LP |
900 | b->sockaddr.un.sun_family = AF_UNIX; |
901 | memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4); | |
902 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4; | |
de1c301e LP |
903 | } |
904 | ||
94bbf1ba | 905 | b->bus_client = true; |
de1c301e | 906 | |
021a1e78 | 907 | r = sd_bus_start(b); |
2571ead1 LP |
908 | if (r < 0) |
909 | goto fail; | |
de1c301e LP |
910 | |
911 | *ret = b; | |
912 | return 0; | |
2571ead1 LP |
913 | |
914 | fail: | |
021a1e78 | 915 | bus_free(b); |
2571ead1 | 916 | return r; |
de1c301e LP |
917 | } |
918 | ||
919 | void sd_bus_close(sd_bus *bus) { | |
920 | if (!bus) | |
921 | return; | |
de1c301e | 922 | |
e82c9509 LP |
923 | if (bus->input_fd >= 0) |
924 | close_nointr_nofail(bus->input_fd); | |
925 | if (bus->output_fd >= 0 && bus->output_fd != bus->input_fd) | |
926 | close_nointr_nofail(bus->output_fd); | |
927 | ||
928 | bus->input_fd = bus->output_fd = -1; | |
de1c301e LP |
929 | } |
930 | ||
931 | sd_bus *sd_bus_ref(sd_bus *bus) { | |
932 | if (!bus) | |
933 | return NULL; | |
934 | ||
935 | assert(bus->n_ref > 0); | |
936 | ||
937 | bus->n_ref++; | |
938 | return bus; | |
939 | } | |
940 | ||
941 | sd_bus *sd_bus_unref(sd_bus *bus) { | |
942 | if (!bus) | |
943 | return NULL; | |
944 | ||
945 | assert(bus->n_ref > 0); | |
946 | bus->n_ref--; | |
947 | ||
948 | if (bus->n_ref <= 0) | |
949 | bus_free(bus); | |
950 | ||
951 | return NULL; | |
952 | } | |
953 | ||
e3017af9 LP |
954 | int sd_bus_is_open(sd_bus *bus) { |
955 | if (!bus) | |
956 | return -EINVAL; | |
957 | ||
e82c9509 | 958 | return bus->state != BUS_UNSET && bus->input_fd >= 0; |
e3017af9 LP |
959 | } |
960 | ||
d728d708 LP |
961 | int sd_bus_can_send(sd_bus *bus, char type) { |
962 | int r; | |
963 | ||
de1c301e LP |
964 | if (!bus) |
965 | return -EINVAL; | |
e82c9509 | 966 | if (bus->output_fd < 0) |
021a1e78 | 967 | return -ENOTCONN; |
de1c301e | 968 | |
d728d708 | 969 | if (type == SD_BUS_TYPE_UNIX_FD) { |
021a1e78 LP |
970 | if (!bus->negotiate_fds) |
971 | return 0; | |
972 | ||
20902f3e | 973 | r = bus_ensure_running(bus); |
d728d708 LP |
974 | if (r < 0) |
975 | return r; | |
de1c301e | 976 | |
d728d708 LP |
977 | return bus->can_fds; |
978 | } | |
979 | ||
980 | return bus_type_is_valid(type); | |
de1c301e LP |
981 | } |
982 | ||
98178d39 | 983 | int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) { |
d728d708 | 984 | int r; |
de1c301e LP |
985 | |
986 | if (!bus) | |
987 | return -EINVAL; | |
98178d39 | 988 | if (!server_id) |
d728d708 | 989 | return -EINVAL; |
de1c301e | 990 | |
20902f3e | 991 | r = bus_ensure_running(bus); |
d728d708 LP |
992 | if (r < 0) |
993 | return r; | |
de1c301e | 994 | |
98178d39 | 995 | *server_id = bus->server_id; |
d728d708 | 996 | return 0; |
de1c301e LP |
997 | } |
998 | ||
999 | static int bus_seal_message(sd_bus *b, sd_bus_message *m) { | |
1000 | assert(m); | |
1001 | ||
89ffcd2a LP |
1002 | if (m->header->version > b->message_version) |
1003 | return -EPERM; | |
1004 | ||
de1c301e LP |
1005 | if (m->sealed) |
1006 | return 0; | |
1007 | ||
9a17484d | 1008 | return bus_message_seal(m, ++b->serial); |
de1c301e LP |
1009 | } |
1010 | ||
de1c301e | 1011 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1012 | int r, ret = 0; |
de1c301e LP |
1013 | |
1014 | assert(bus); | |
89ffcd2a | 1015 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1016 | |
e82c9509 | 1017 | if (bus->output_fd < 0) |
de1c301e LP |
1018 | return -ENOTCONN; |
1019 | ||
1020 | while (bus->wqueue_size > 0) { | |
1021 | ||
6629161f LP |
1022 | if (bus->is_kernel) |
1023 | r = bus_kernel_write_message(bus, bus->wqueue[0]); | |
1024 | else | |
1025 | r = bus_socket_write_message(bus, bus->wqueue[0], &bus->windex); | |
1026 | ||
de1c301e LP |
1027 | if (r < 0) { |
1028 | sd_bus_close(bus); | |
1029 | return r; | |
1030 | } else if (r == 0) | |
e3017af9 LP |
1031 | /* Didn't do anything this time */ |
1032 | return ret; | |
6629161f | 1033 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1034 | /* Fully written. Let's drop the entry from |
1035 | * the queue. | |
1036 | * | |
1037 | * This isn't particularly optimized, but | |
1038 | * well, this is supposed to be our worst-case | |
1039 | * buffer only, and the socket buffer is | |
1040 | * supposed to be our primary buffer, and if | |
1041 | * it got full, then all bets are off | |
1042 | * anyway. */ | |
1043 | ||
1044 | sd_bus_message_unref(bus->wqueue[0]); | |
1045 | bus->wqueue_size --; | |
1046 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); | |
1047 | bus->windex = 0; | |
1048 | ||
e3017af9 | 1049 | ret = 1; |
de1c301e LP |
1050 | } |
1051 | } | |
1052 | ||
e3017af9 | 1053 | return ret; |
de1c301e LP |
1054 | } |
1055 | ||
1056 | static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) { | |
2bf938c1 | 1057 | sd_bus_message *z = NULL; |
e3017af9 | 1058 | int r, ret = 0; |
de1c301e LP |
1059 | |
1060 | assert(bus); | |
1061 | assert(m); | |
89ffcd2a | 1062 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1063 | |
e82c9509 | 1064 | if (bus->input_fd < 0) |
de1c301e LP |
1065 | return -ENOTCONN; |
1066 | ||
1067 | if (bus->rqueue_size > 0) { | |
1068 | /* Dispatch a queued message */ | |
1069 | ||
1070 | *m = bus->rqueue[0]; | |
1071 | bus->rqueue_size --; | |
1072 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1073 | return 1; | |
1074 | } | |
1075 | ||
1076 | /* Try to read a new message */ | |
e3017af9 | 1077 | do { |
6629161f LP |
1078 | if (bus->is_kernel) |
1079 | r = bus_kernel_read_message(bus, &z); | |
1080 | else | |
1081 | r = bus_socket_read_message(bus, &z); | |
1082 | ||
e3017af9 LP |
1083 | if (r < 0) { |
1084 | sd_bus_close(bus); | |
1085 | return r; | |
1086 | } | |
1087 | if (r == 0) | |
1088 | return ret; | |
de1c301e | 1089 | |
e3017af9 LP |
1090 | r = 1; |
1091 | } while (!z); | |
1092 | ||
1093 | *m = z; | |
1094 | return 1; | |
de1c301e LP |
1095 | } |
1096 | ||
1097 | int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) { | |
1098 | int r; | |
1099 | ||
1100 | if (!bus) | |
1101 | return -EINVAL; | |
021a1e78 LP |
1102 | if (bus->state == BUS_UNSET) |
1103 | return -ENOTCONN; | |
e82c9509 | 1104 | if (bus->output_fd < 0) |
de1c301e LP |
1105 | return -ENOTCONN; |
1106 | if (!m) | |
1107 | return -EINVAL; | |
021a1e78 LP |
1108 | |
1109 | if (m->n_fds > 0) { | |
1110 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1111 | if (r < 0) | |
1112 | return r; | |
1113 | if (r == 0) | |
1114 | return -ENOTSUP; | |
1115 | } | |
de1c301e | 1116 | |
29f6aadd LP |
1117 | /* If the serial number isn't kept, then we know that no reply |
1118 | * is expected */ | |
1119 | if (!serial && !m->sealed) | |
1120 | m->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; | |
1121 | ||
de1c301e LP |
1122 | r = bus_seal_message(bus, m); |
1123 | if (r < 0) | |
1124 | return r; | |
1125 | ||
5407f2de LP |
1126 | /* If this is a reply and no reply was requested, then let's |
1127 | * suppress this, if we can */ | |
1128 | if (m->dont_send && !serial) | |
1129 | return 0; | |
1130 | ||
89ffcd2a | 1131 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1132 | size_t idx = 0; |
1133 | ||
6629161f LP |
1134 | if (bus->is_kernel) |
1135 | r = bus_kernel_write_message(bus, m); | |
1136 | else | |
1137 | r = bus_socket_write_message(bus, m, &idx); | |
1138 | ||
de1c301e LP |
1139 | if (r < 0) { |
1140 | sd_bus_close(bus); | |
1141 | return r; | |
6629161f | 1142 | } else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1143 | /* Wasn't fully written. So let's remember how |
1144 | * much was written. Note that the first entry | |
1145 | * of the wqueue array is always allocated so | |
1146 | * that we always can remember how much was | |
1147 | * written. */ | |
1148 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1149 | bus->wqueue_size = 1; | |
1150 | bus->windex = idx; | |
1151 | } | |
1152 | } else { | |
1153 | sd_bus_message **q; | |
1154 | ||
1155 | /* Just append it to the queue. */ | |
1156 | ||
25220239 | 1157 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1158 | return -ENOBUFS; |
1159 | ||
1160 | q = realloc(bus->wqueue, sizeof(sd_bus_message*) * (bus->wqueue_size + 1)); | |
1161 | if (!q) | |
1162 | return -ENOMEM; | |
1163 | ||
1164 | bus->wqueue = q; | |
1165 | q[bus->wqueue_size ++] = sd_bus_message_ref(m); | |
1166 | } | |
1167 | ||
1168 | if (serial) | |
1169 | *serial = BUS_MESSAGE_SERIAL(m); | |
1170 | ||
1171 | return 0; | |
1172 | } | |
1173 | ||
1174 | static usec_t calc_elapse(uint64_t usec) { | |
1175 | if (usec == (uint64_t) -1) | |
1176 | return 0; | |
1177 | ||
1178 | if (usec == 0) | |
e3017af9 | 1179 | usec = BUS_DEFAULT_TIMEOUT; |
de1c301e LP |
1180 | |
1181 | return now(CLOCK_MONOTONIC) + usec; | |
1182 | } | |
1183 | ||
e3017af9 LP |
1184 | static int timeout_compare(const void *a, const void *b) { |
1185 | const struct reply_callback *x = a, *y = b; | |
1186 | ||
1187 | if (x->timeout != 0 && y->timeout == 0) | |
1188 | return -1; | |
1189 | ||
1190 | if (x->timeout == 0 && y->timeout != 0) | |
1191 | return 1; | |
1192 | ||
1193 | if (x->timeout < y->timeout) | |
1194 | return -1; | |
1195 | ||
1196 | if (x->timeout > y->timeout) | |
1197 | return 1; | |
1198 | ||
1199 | return 0; | |
1200 | } | |
1201 | ||
de1c301e LP |
1202 | int sd_bus_send_with_reply( |
1203 | sd_bus *bus, | |
1204 | sd_bus_message *m, | |
52f3ba91 | 1205 | sd_bus_message_handler_t callback, |
de1c301e LP |
1206 | void *userdata, |
1207 | uint64_t usec, | |
1208 | uint64_t *serial) { | |
1209 | ||
1210 | struct reply_callback *c; | |
1211 | int r; | |
1212 | ||
1213 | if (!bus) | |
1214 | return -EINVAL; | |
021a1e78 LP |
1215 | if (bus->state == BUS_UNSET) |
1216 | return -ENOTCONN; | |
e82c9509 | 1217 | if (bus->output_fd < 0) |
de1c301e LP |
1218 | return -ENOTCONN; |
1219 | if (!m) | |
1220 | return -EINVAL; | |
1221 | if (!callback) | |
1222 | return -EINVAL; | |
89ffcd2a | 1223 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) |
de1c301e | 1224 | return -EINVAL; |
89ffcd2a LP |
1225 | if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) |
1226 | return -EINVAL; | |
1227 | ||
1228 | r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func); | |
1229 | if (r < 0) | |
1230 | return r; | |
de1c301e | 1231 | |
e3017af9 LP |
1232 | if (usec != (uint64_t) -1) { |
1233 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); | |
1234 | if (r < 0) | |
1235 | return r; | |
1236 | } | |
1237 | ||
de1c301e LP |
1238 | r = bus_seal_message(bus, m); |
1239 | if (r < 0) | |
1240 | return r; | |
1241 | ||
eba8617e | 1242 | c = new0(struct reply_callback, 1); |
de1c301e LP |
1243 | if (!c) |
1244 | return -ENOMEM; | |
1245 | ||
1246 | c->callback = callback; | |
1247 | c->userdata = userdata; | |
1248 | c->serial = BUS_MESSAGE_SERIAL(m); | |
1249 | c->timeout = calc_elapse(usec); | |
1250 | ||
1251 | r = hashmap_put(bus->reply_callbacks, &c->serial, c); | |
1252 | if (r < 0) { | |
1253 | free(c); | |
1254 | return r; | |
1255 | } | |
1256 | ||
e3017af9 LP |
1257 | if (c->timeout != 0) { |
1258 | r = prioq_put(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1259 | if (r < 0) { | |
1260 | c->timeout = 0; | |
1261 | sd_bus_send_with_reply_cancel(bus, c->serial); | |
1262 | return r; | |
1263 | } | |
1264 | } | |
1265 | ||
de1c301e LP |
1266 | r = sd_bus_send(bus, m, serial); |
1267 | if (r < 0) { | |
e3017af9 | 1268 | sd_bus_send_with_reply_cancel(bus, c->serial); |
de1c301e LP |
1269 | return r; |
1270 | } | |
1271 | ||
1272 | return r; | |
1273 | } | |
1274 | ||
1275 | int sd_bus_send_with_reply_cancel(sd_bus *bus, uint64_t serial) { | |
e3017af9 | 1276 | struct reply_callback *c; |
de1c301e LP |
1277 | |
1278 | if (!bus) | |
1279 | return -EINVAL; | |
1280 | if (serial == 0) | |
1281 | return -EINVAL; | |
1282 | ||
1283 | c = hashmap_remove(bus->reply_callbacks, &serial); | |
1284 | if (!c) | |
1285 | return 0; | |
1286 | ||
e3017af9 LP |
1287 | if (c->timeout != 0) |
1288 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1289 | ||
de1c301e LP |
1290 | free(c); |
1291 | return 1; | |
1292 | } | |
1293 | ||
20902f3e | 1294 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1295 | int r; |
1296 | ||
1297 | assert(bus); | |
1298 | ||
e82c9509 | 1299 | if (bus->input_fd < 0) |
021a1e78 LP |
1300 | return -ENOTCONN; |
1301 | if (bus->state == BUS_UNSET) | |
1302 | return -ENOTCONN; | |
1303 | ||
d728d708 LP |
1304 | if (bus->state == BUS_RUNNING) |
1305 | return 1; | |
89ffcd2a LP |
1306 | |
1307 | for (;;) { | |
1308 | r = sd_bus_process(bus, NULL); | |
1309 | if (r < 0) | |
1310 | return r; | |
d728d708 LP |
1311 | if (bus->state == BUS_RUNNING) |
1312 | return 1; | |
e3017af9 LP |
1313 | if (r > 0) |
1314 | continue; | |
89ffcd2a LP |
1315 | |
1316 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1317 | if (r < 0) | |
1318 | return r; | |
1319 | } | |
1320 | } | |
1321 | ||
de1c301e LP |
1322 | int sd_bus_send_with_reply_and_block( |
1323 | sd_bus *bus, | |
1324 | sd_bus_message *m, | |
1325 | uint64_t usec, | |
1326 | sd_bus_error *error, | |
1327 | sd_bus_message **reply) { | |
1328 | ||
1329 | int r; | |
1330 | usec_t timeout; | |
1331 | uint64_t serial; | |
1332 | bool room = false; | |
1333 | ||
1334 | if (!bus) | |
1335 | return -EINVAL; | |
e82c9509 | 1336 | if (bus->output_fd < 0) |
de1c301e | 1337 | return -ENOTCONN; |
021a1e78 LP |
1338 | if (bus->state == BUS_UNSET) |
1339 | return -ENOTCONN; | |
de1c301e LP |
1340 | if (!m) |
1341 | return -EINVAL; | |
89ffcd2a | 1342 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) |
de1c301e | 1343 | return -EINVAL; |
89ffcd2a | 1344 | if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) |
de1c301e | 1345 | return -EINVAL; |
89ffcd2a LP |
1346 | if (bus_error_is_dirty(error)) |
1347 | return -EINVAL; | |
1348 | ||
20902f3e | 1349 | r = bus_ensure_running(bus); |
89ffcd2a LP |
1350 | if (r < 0) |
1351 | return r; | |
de1c301e LP |
1352 | |
1353 | r = sd_bus_send(bus, m, &serial); | |
1354 | if (r < 0) | |
1355 | return r; | |
1356 | ||
1357 | timeout = calc_elapse(usec); | |
1358 | ||
1359 | for (;;) { | |
1360 | usec_t left; | |
e3017af9 | 1361 | sd_bus_message *incoming = NULL; |
de1c301e LP |
1362 | |
1363 | if (!room) { | |
1364 | sd_bus_message **q; | |
1365 | ||
25220239 LP |
1366 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
1367 | return -ENOBUFS; | |
1368 | ||
de1c301e LP |
1369 | /* Make sure there's room for queuing this |
1370 | * locally, before we read the message */ | |
1371 | ||
1372 | q = realloc(bus->rqueue, (bus->rqueue_size + 1) * sizeof(sd_bus_message*)); | |
1373 | if (!q) | |
1374 | return -ENOMEM; | |
1375 | ||
1376 | bus->rqueue = q; | |
1377 | room = true; | |
1378 | } | |
1379 | ||
6629161f LP |
1380 | if (bus->is_kernel) |
1381 | r = bus_kernel_read_message(bus, &incoming); | |
1382 | else | |
1383 | r = bus_socket_read_message(bus, &incoming); | |
de1c301e LP |
1384 | if (r < 0) |
1385 | return r; | |
e3017af9 | 1386 | if (incoming) { |
89ffcd2a | 1387 | |
de1c301e LP |
1388 | if (incoming->reply_serial == serial) { |
1389 | /* Found a match! */ | |
1390 | ||
1391 | if (incoming->header->type == SD_BUS_MESSAGE_TYPE_METHOD_RETURN) { | |
b7f247e0 LP |
1392 | |
1393 | if (reply) | |
1394 | *reply = incoming; | |
1395 | else | |
1396 | sd_bus_message_unref(incoming); | |
1397 | ||
de1c301e LP |
1398 | return 0; |
1399 | } | |
1400 | ||
1401 | if (incoming->header->type == SD_BUS_MESSAGE_TYPE_METHOD_ERROR) { | |
1402 | int k; | |
1403 | ||
1404 | r = sd_bus_error_copy(error, &incoming->error); | |
1405 | if (r < 0) { | |
1406 | sd_bus_message_unref(incoming); | |
1407 | return r; | |
1408 | } | |
1409 | ||
1410 | k = bus_error_to_errno(&incoming->error); | |
1411 | sd_bus_message_unref(incoming); | |
1412 | return k; | |
1413 | } | |
1414 | ||
1415 | sd_bus_message_unref(incoming); | |
1416 | return -EIO; | |
1417 | } | |
1418 | ||
1419 | /* There's already guaranteed to be room for | |
1420 | * this, so need to resize things here */ | |
1421 | bus->rqueue[bus->rqueue_size ++] = incoming; | |
1422 | room = false; | |
1423 | ||
1424 | /* Try to read more, right-away */ | |
1425 | continue; | |
1426 | } | |
e3017af9 LP |
1427 | if (r != 0) |
1428 | continue; | |
de1c301e LP |
1429 | |
1430 | if (timeout > 0) { | |
1431 | usec_t n; | |
1432 | ||
1433 | n = now(CLOCK_MONOTONIC); | |
1434 | if (n >= timeout) | |
1435 | return -ETIMEDOUT; | |
1436 | ||
1437 | left = timeout - n; | |
1438 | } else | |
1439 | left = (uint64_t) -1; | |
1440 | ||
e3017af9 | 1441 | r = bus_poll(bus, true, left); |
de1c301e LP |
1442 | if (r < 0) |
1443 | return r; | |
1444 | ||
1445 | r = dispatch_wqueue(bus); | |
1446 | if (r < 0) | |
1447 | return r; | |
1448 | } | |
1449 | } | |
1450 | ||
1451 | int sd_bus_get_fd(sd_bus *bus) { | |
1452 | if (!bus) | |
1453 | return -EINVAL; | |
e82c9509 | 1454 | if (bus->input_fd < 0) |
89ffcd2a | 1455 | return -ENOTCONN; |
e82c9509 LP |
1456 | if (bus->input_fd != bus->output_fd) |
1457 | return -EPERM; | |
de1c301e | 1458 | |
e82c9509 | 1459 | return bus->input_fd; |
de1c301e LP |
1460 | } |
1461 | ||
1462 | int sd_bus_get_events(sd_bus *bus) { | |
1463 | int flags = 0; | |
1464 | ||
1465 | if (!bus) | |
1466 | return -EINVAL; | |
021a1e78 LP |
1467 | if (bus->state == BUS_UNSET) |
1468 | return -ENOTCONN; | |
e82c9509 | 1469 | if (bus->input_fd < 0) |
89ffcd2a | 1470 | return -ENOTCONN; |
de1c301e LP |
1471 | |
1472 | if (bus->state == BUS_OPENING) | |
1473 | flags |= POLLOUT; | |
89ffcd2a LP |
1474 | else if (bus->state == BUS_AUTHENTICATING) { |
1475 | ||
2181a7f5 | 1476 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
1477 | flags |= POLLOUT; |
1478 | ||
1479 | flags |= POLLIN; | |
1480 | ||
1481 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
1482 | if (bus->rqueue_size <= 0) |
1483 | flags |= POLLIN; | |
1484 | if (bus->wqueue_size > 0) | |
1485 | flags |= POLLOUT; | |
1486 | } | |
1487 | ||
1488 | return flags; | |
1489 | } | |
1490 | ||
e3017af9 LP |
1491 | int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
1492 | struct reply_callback *c; | |
1493 | ||
1494 | if (!bus) | |
1495 | return -EINVAL; | |
1496 | if (!timeout_usec) | |
1497 | return -EINVAL; | |
021a1e78 LP |
1498 | if (bus->state == BUS_UNSET) |
1499 | return -ENOTCONN; | |
e82c9509 | 1500 | if (bus->input_fd < 0) |
e3017af9 LP |
1501 | return -ENOTCONN; |
1502 | ||
1503 | if (bus->state == BUS_AUTHENTICATING) { | |
1504 | *timeout_usec = bus->auth_timeout; | |
1505 | return 1; | |
1506 | } | |
1507 | ||
adee69fa LP |
1508 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
1509 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1510 | return 0; |
adee69fa | 1511 | } |
e3017af9 LP |
1512 | |
1513 | c = prioq_peek(bus->reply_callbacks_prioq); | |
adee69fa LP |
1514 | if (!c) { |
1515 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1516 | return 0; |
adee69fa | 1517 | } |
e3017af9 LP |
1518 | |
1519 | *timeout_usec = c->timeout; | |
1520 | return 1; | |
1521 | } | |
1522 | ||
1523 | static int process_timeout(sd_bus *bus) { | |
e3017af9 LP |
1524 | struct reply_callback *c; |
1525 | usec_t n; | |
1526 | int r; | |
1527 | ||
1528 | assert(bus); | |
1529 | ||
1530 | c = prioq_peek(bus->reply_callbacks_prioq); | |
1531 | if (!c) | |
1532 | return 0; | |
1533 | ||
1534 | n = now(CLOCK_MONOTONIC); | |
1535 | if (c->timeout > n) | |
1536 | return 0; | |
1537 | ||
1538 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); | |
1539 | hashmap_remove(bus->reply_callbacks, &c->serial); | |
1540 | ||
1541 | r = c->callback(bus, ETIMEDOUT, NULL, c->userdata); | |
1542 | free(c); | |
1543 | ||
1544 | return r < 0 ? r : 1; | |
1545 | } | |
1546 | ||
9d373862 LP |
1547 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
1548 | assert(bus); | |
1549 | assert(m); | |
1550 | ||
1551 | if (bus->state != BUS_HELLO) | |
1552 | return 0; | |
1553 | ||
1554 | /* Let's make sure the first message on the bus is the HELLO | |
1555 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
1556 | * here (we leave that to the usual handling), we just verify |
1557 | * we don't let any earlier msg through. */ | |
9d373862 LP |
1558 | |
1559 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_RETURN && | |
1560 | m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_ERROR) | |
1561 | return -EIO; | |
1562 | ||
1563 | if (m->reply_serial != bus->hello_serial) | |
1564 | return -EIO; | |
1565 | ||
1566 | return 0; | |
1567 | } | |
1568 | ||
a652755d LP |
1569 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
1570 | struct reply_callback *c; | |
1571 | int r; | |
1572 | ||
1573 | assert(bus); | |
1574 | assert(m); | |
1575 | ||
1576 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_RETURN && | |
1577 | m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_ERROR) | |
1578 | return 0; | |
1579 | ||
1580 | c = hashmap_remove(bus->reply_callbacks, &m->reply_serial); | |
1581 | if (!c) | |
1582 | return 0; | |
1583 | ||
1584 | if (c->timeout != 0) | |
1585 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1586 | ||
1587 | r = c->callback(bus, 0, m, c->userdata); | |
1588 | free(c); | |
1589 | ||
1590 | return r; | |
1591 | } | |
1592 | ||
1593 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
1594 | struct filter_callback *l; | |
1595 | int r; | |
1596 | ||
392d5b37 LP |
1597 | assert(bus); |
1598 | assert(m); | |
1599 | ||
7286037f LP |
1600 | do { |
1601 | bus->filter_callbacks_modified = false; | |
1602 | ||
1603 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1604 | ||
1605 | if (bus->filter_callbacks_modified) | |
1606 | break; | |
1607 | ||
1608 | /* Don't run this more than once per iteration */ | |
1609 | if (l->last_iteration == bus->iteration_counter) | |
1610 | continue; | |
1611 | ||
1612 | l->last_iteration = bus->iteration_counter; | |
1613 | ||
1614 | r = l->callback(bus, 0, m, l->userdata); | |
1615 | if (r != 0) | |
1616 | return r; | |
1617 | ||
1618 | } | |
1619 | ||
1620 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
1621 | |
1622 | return 0; | |
1623 | } | |
1624 | ||
392d5b37 | 1625 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
1626 | int r; |
1627 | ||
392d5b37 LP |
1628 | assert(bus); |
1629 | assert(m); | |
1630 | ||
7286037f LP |
1631 | do { |
1632 | bus->match_callbacks_modified = false; | |
1633 | ||
1634 | r = bus_match_run(bus, &bus->match_callbacks, 0, m); | |
1635 | if (r != 0) | |
1636 | return r; | |
1637 | ||
1638 | } while (bus->match_callbacks_modified); | |
1639 | ||
1640 | return 0; | |
392d5b37 LP |
1641 | } |
1642 | ||
b9bf7e2b LP |
1643 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
1644 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
1645 | int r; | |
1646 | ||
1647 | assert(bus); | |
1648 | assert(m); | |
1649 | ||
1650 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) | |
1651 | return 0; | |
1652 | ||
1653 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
1654 | return 0; | |
1655 | ||
1656 | if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) | |
1657 | return 1; | |
1658 | ||
1659 | if (streq_ptr(m->member, "Ping")) | |
1660 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1661 | else if (streq_ptr(m->member, "GetMachineId")) { | |
1662 | sd_id128_t id; | |
1663 | char sid[33]; | |
1664 | ||
1665 | r = sd_id128_get_machine(&id); | |
1666 | if (r < 0) | |
1667 | return r; | |
1668 | ||
1669 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1670 | if (r < 0) | |
1671 | return r; | |
1672 | ||
1673 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
1674 | } else { | |
c784c5ce | 1675 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
b9bf7e2b LP |
1676 | |
1677 | sd_bus_error_set(&error, | |
1678 | "org.freedesktop.DBus.Error.UnknownMethod", | |
1679 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); | |
1680 | ||
1681 | r = sd_bus_message_new_method_error(bus, m, &error, &reply); | |
1682 | } | |
1683 | ||
1684 | if (r < 0) | |
1685 | return r; | |
1686 | ||
1687 | r = sd_bus_send(bus, reply, NULL); | |
1688 | if (r < 0) | |
1689 | return r; | |
1690 | ||
1691 | return 1; | |
1692 | } | |
1693 | ||
a652755d | 1694 | static int process_object(sd_bus *bus, sd_bus_message *m) { |
c784c5ce | 1695 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
a652755d LP |
1696 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; |
1697 | struct object_callback *c; | |
e3017af9 | 1698 | int r; |
a652755d | 1699 | bool found = false; |
7286037f | 1700 | size_t pl; |
e3017af9 LP |
1701 | |
1702 | assert(bus); | |
1703 | assert(m); | |
1704 | ||
a652755d LP |
1705 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) |
1706 | return 0; | |
e3017af9 | 1707 | |
a652755d LP |
1708 | if (hashmap_isempty(bus->object_callbacks)) |
1709 | return 0; | |
e3017af9 | 1710 | |
7286037f | 1711 | pl = strlen(m->path); |
a652755d | 1712 | |
7286037f LP |
1713 | do { |
1714 | char p[pl+1]; | |
e3017af9 | 1715 | |
7286037f | 1716 | bus->object_callbacks_modified = false; |
a652755d | 1717 | |
7286037f LP |
1718 | c = hashmap_get(bus->object_callbacks, m->path); |
1719 | if (c && c->last_iteration != bus->iteration_counter) { | |
a652755d | 1720 | |
7286037f | 1721 | c->last_iteration = bus->iteration_counter; |
a652755d | 1722 | |
a652755d | 1723 | r = c->callback(bus, 0, m, c->userdata); |
e3017af9 LP |
1724 | if (r != 0) |
1725 | return r; | |
a652755d LP |
1726 | |
1727 | found = true; | |
e3017af9 | 1728 | } |
7286037f LP |
1729 | |
1730 | /* Look for fallback prefixes */ | |
1731 | strcpy(p, m->path); | |
1732 | for (;;) { | |
1733 | char *e; | |
1734 | ||
1735 | if (bus->object_callbacks_modified) | |
1736 | break; | |
1737 | ||
1738 | e = strrchr(p, '/'); | |
1739 | if (e == p || !e) | |
1740 | break; | |
1741 | ||
1742 | *e = 0; | |
1743 | ||
1744 | c = hashmap_get(bus->object_callbacks, p); | |
1745 | if (c && c->last_iteration != bus->iteration_counter && c->is_fallback) { | |
1746 | ||
1747 | c->last_iteration = bus->iteration_counter; | |
1748 | ||
1749 | r = c->callback(bus, 0, m, c->userdata); | |
1750 | if (r != 0) | |
1751 | return r; | |
1752 | ||
1753 | found = true; | |
1754 | } | |
1755 | } | |
1756 | ||
1757 | } while (bus->object_callbacks_modified); | |
e3017af9 | 1758 | |
0a72c2bd LP |
1759 | /* We found some handlers but none wanted to take this, then |
1760 | * return this -- with one exception, we can handle | |
1761 | * introspection minimally ourselves */ | |
1762 | if (!found || sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) | |
a652755d LP |
1763 | return 0; |
1764 | ||
1765 | sd_bus_error_set(&error, | |
1766 | "org.freedesktop.DBus.Error.UnknownMethod", | |
1767 | "Unknown method '%s' or interface '%s'.", m->member, m->interface); | |
1768 | ||
1769 | r = sd_bus_message_new_method_error(bus, m, &error, &reply); | |
1770 | if (r < 0) | |
1771 | return r; | |
1772 | ||
1773 | r = sd_bus_send(bus, reply, NULL); | |
1774 | if (r < 0) | |
1775 | return r; | |
e3017af9 | 1776 | |
a652755d LP |
1777 | return 1; |
1778 | } | |
1779 | ||
0a72c2bd LP |
1780 | static int process_introspect(sd_bus *bus, sd_bus_message *m) { |
1781 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
1782 | _cleanup_free_ char *introspection = NULL; | |
1783 | _cleanup_set_free_free_ Set *s = NULL; | |
1784 | _cleanup_fclose_ FILE *f = NULL; | |
1785 | struct object_callback *c; | |
1786 | Iterator i; | |
1787 | size_t size = 0; | |
1788 | char *node; | |
1789 | int r; | |
1790 | ||
1791 | assert(bus); | |
1792 | assert(m); | |
1793 | ||
1794 | if (!sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) | |
1795 | return 0; | |
1796 | ||
1797 | if (!m->path) | |
1798 | return 0; | |
1799 | ||
1800 | s = set_new(string_hash_func, string_compare_func); | |
1801 | if (!s) | |
1802 | return -ENOMEM; | |
1803 | ||
1804 | HASHMAP_FOREACH(c, bus->object_callbacks, i) { | |
1805 | const char *e; | |
1806 | char *a, *p; | |
1807 | ||
1808 | if (streq(c->path, "/")) | |
1809 | continue; | |
1810 | ||
1811 | if (streq(m->path, "/")) | |
1812 | e = c->path; | |
1813 | else { | |
1814 | e = startswith(c->path, m->path); | |
1815 | if (!e || *e != '/') | |
1816 | continue; | |
1817 | } | |
1818 | ||
1819 | a = strdup(e+1); | |
1820 | if (!a) | |
1821 | return -ENOMEM; | |
1822 | ||
1823 | p = strchr(a, '/'); | |
1824 | if (p) | |
1825 | *p = 0; | |
1826 | ||
1827 | r = set_put(s, a); | |
1828 | if (r < 0) { | |
1829 | free(a); | |
1830 | ||
1831 | if (r != -EEXIST) | |
1832 | return r; | |
1833 | } | |
1834 | } | |
1835 | ||
1836 | f = open_memstream(&introspection, &size); | |
1837 | if (!f) | |
1838 | return -ENOMEM; | |
1839 | ||
1840 | fputs(SD_BUS_INTROSPECT_DOCTYPE, f); | |
1841 | fputs("<node>\n", f); | |
1842 | fputs(SD_BUS_INTROSPECT_INTERFACE_PEER, f); | |
1843 | fputs(SD_BUS_INTROSPECT_INTERFACE_INTROSPECTABLE, f); | |
1844 | ||
1845 | while ((node = set_steal_first(s))) { | |
1846 | fprintf(f, " <node name=\"%s\"/>\n", node); | |
1847 | free(node); | |
1848 | } | |
1849 | ||
1850 | fputs("</node>\n", f); | |
1851 | ||
1852 | fflush(f); | |
1853 | ||
1854 | if (ferror(f)) | |
1855 | return -ENOMEM; | |
1856 | ||
1857 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1858 | if (r < 0) | |
1859 | return r; | |
1860 | ||
1861 | r = sd_bus_message_append(reply, "s", introspection); | |
1862 | if (r < 0) | |
1863 | return r; | |
1864 | ||
1865 | r = sd_bus_send(bus, reply, NULL); | |
1866 | if (r < 0) | |
1867 | return r; | |
1868 | ||
1869 | return 1; | |
1870 | } | |
1871 | ||
a652755d LP |
1872 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
1873 | int r; | |
1874 | ||
1875 | assert(bus); | |
1876 | assert(m); | |
1877 | ||
7286037f LP |
1878 | bus->iteration_counter++; |
1879 | ||
9d373862 LP |
1880 | r = process_hello(bus, m); |
1881 | if (r != 0) | |
1882 | return r; | |
1883 | ||
a652755d LP |
1884 | r = process_reply(bus, m); |
1885 | if (r != 0) | |
1886 | return r; | |
1887 | ||
1888 | r = process_filter(bus, m); | |
1889 | if (r != 0) | |
1890 | return r; | |
1891 | ||
392d5b37 LP |
1892 | r = process_match(bus, m); |
1893 | if (r != 0) | |
1894 | return r; | |
1895 | ||
a652755d LP |
1896 | r = process_builtin(bus, m); |
1897 | if (r != 0) | |
1898 | return r; | |
1899 | ||
0a72c2bd LP |
1900 | r = process_object(bus, m); |
1901 | if (r != 0) | |
1902 | return r; | |
1903 | ||
1904 | return process_introspect(bus, m); | |
e3017af9 LP |
1905 | } |
1906 | ||
a7e3212d LP |
1907 | static int process_running(sd_bus *bus, sd_bus_message **ret) { |
1908 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
de1c301e LP |
1909 | int r; |
1910 | ||
a7e3212d LP |
1911 | assert(bus); |
1912 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); | |
de1c301e | 1913 | |
a7e3212d LP |
1914 | r = process_timeout(bus); |
1915 | if (r != 0) | |
1916 | goto null_message; | |
de1c301e | 1917 | |
a7e3212d LP |
1918 | r = dispatch_wqueue(bus); |
1919 | if (r != 0) | |
1920 | goto null_message; | |
de1c301e | 1921 | |
a7e3212d LP |
1922 | r = dispatch_rqueue(bus, &m); |
1923 | if (r < 0) | |
1924 | return r; | |
1925 | if (!m) | |
1926 | goto null_message; | |
de1c301e | 1927 | |
a7e3212d LP |
1928 | r = process_message(bus, m); |
1929 | if (r != 0) | |
1930 | goto null_message; | |
de1c301e | 1931 | |
a7e3212d LP |
1932 | if (ret) { |
1933 | *ret = m; | |
1934 | m = NULL; | |
1935 | return 1; | |
1936 | } | |
de1c301e | 1937 | |
a7e3212d LP |
1938 | if (m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_CALL) { |
1939 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
c784c5ce | 1940 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
de1c301e | 1941 | |
a7e3212d | 1942 | sd_bus_error_set(&error, "org.freedesktop.DBus.Error.UnknownObject", "Unknown object '%s'.", m->path); |
de1c301e | 1943 | |
a7e3212d LP |
1944 | r = sd_bus_message_new_method_error(bus, m, &error, &reply); |
1945 | if (r < 0) | |
1946 | return r; | |
de1c301e | 1947 | |
a7e3212d LP |
1948 | r = sd_bus_send(bus, reply, NULL); |
1949 | if (r < 0) | |
1950 | return r; | |
1951 | } | |
e3017af9 | 1952 | |
a7e3212d | 1953 | return 1; |
de1c301e | 1954 | |
a7e3212d LP |
1955 | null_message: |
1956 | if (r >= 0 && ret) | |
1957 | *ret = NULL; | |
de1c301e | 1958 | |
a7e3212d LP |
1959 | return r; |
1960 | } | |
e3017af9 | 1961 | |
a7e3212d LP |
1962 | int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
1963 | int r; | |
de1c301e | 1964 | |
a7e3212d LP |
1965 | /* Returns 0 when we didn't do anything. This should cause the |
1966 | * caller to invoke sd_bus_wait() before returning the next | |
1967 | * time. Returns > 0 when we did something, which possibly | |
1968 | * means *ret is filled in with an unprocessed message. */ | |
de1c301e | 1969 | |
a7e3212d LP |
1970 | if (!bus) |
1971 | return -EINVAL; | |
e82c9509 | 1972 | if (bus->input_fd < 0) |
a7e3212d | 1973 | return -ENOTCONN; |
de1c301e | 1974 | |
6807947e LP |
1975 | /* We don't allow recursively invoking sd_bus_process(). */ |
1976 | if (bus->processing) | |
1977 | return -EBUSY; | |
1978 | ||
a7e3212d | 1979 | switch (bus->state) { |
de1c301e | 1980 | |
a7e3212d LP |
1981 | case BUS_UNSET: |
1982 | return -ENOTCONN; | |
de1c301e | 1983 | |
a7e3212d LP |
1984 | case BUS_OPENING: |
1985 | r = bus_socket_process_opening(bus); | |
1986 | if (r < 0) | |
1987 | return r; | |
1988 | if (ret) | |
1989 | *ret = NULL; | |
1990 | return r; | |
b9bf7e2b | 1991 | |
a7e3212d | 1992 | case BUS_AUTHENTICATING: |
89ffcd2a | 1993 | |
a7e3212d LP |
1994 | r = bus_socket_process_authenticating(bus); |
1995 | if (r < 0) | |
1996 | return r; | |
1997 | if (ret) | |
1998 | *ret = NULL; | |
1999 | return r; | |
89ffcd2a | 2000 | |
a7e3212d LP |
2001 | case BUS_RUNNING: |
2002 | case BUS_HELLO: | |
89ffcd2a | 2003 | |
6807947e LP |
2004 | bus->processing = true; |
2005 | r = process_running(bus, ret); | |
2006 | bus->processing = false; | |
2007 | ||
2008 | return r; | |
de1c301e LP |
2009 | } |
2010 | ||
89ffcd2a | 2011 | assert_not_reached("Unknown state"); |
de1c301e LP |
2012 | } |
2013 | ||
e3017af9 | 2014 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
b92bea5d | 2015 | struct pollfd p[2] = {}; |
e82c9509 | 2016 | int r, e, n; |
de1c301e | 2017 | struct timespec ts; |
e3017af9 LP |
2018 | usec_t until, m; |
2019 | ||
2020 | assert(bus); | |
de1c301e | 2021 | |
e82c9509 | 2022 | if (bus->input_fd < 0) |
89ffcd2a LP |
2023 | return -ENOTCONN; |
2024 | ||
de1c301e LP |
2025 | e = sd_bus_get_events(bus); |
2026 | if (e < 0) | |
2027 | return e; | |
2028 | ||
e3017af9 LP |
2029 | if (need_more) |
2030 | e |= POLLIN; | |
2031 | ||
2032 | r = sd_bus_get_timeout(bus, &until); | |
2033 | if (r < 0) | |
2034 | return r; | |
2035 | if (r == 0) | |
2036 | m = (uint64_t) -1; | |
2037 | else { | |
e82c9509 LP |
2038 | usec_t nw; |
2039 | nw = now(CLOCK_MONOTONIC); | |
2040 | m = until > nw ? until - nw : 0; | |
e3017af9 LP |
2041 | } |
2042 | ||
2043 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) | |
2044 | m = timeout_usec; | |
2045 | ||
e82c9509 | 2046 | p[0].fd = bus->input_fd; |
e82c9509 LP |
2047 | if (bus->output_fd == bus->input_fd) { |
2048 | p[0].events = e; | |
2049 | n = 1; | |
2050 | } else { | |
2051 | p[0].events = e & POLLIN; | |
2052 | p[1].fd = bus->output_fd; | |
2053 | p[1].events = e & POLLOUT; | |
2054 | n = 2; | |
2055 | } | |
de1c301e | 2056 | |
e82c9509 | 2057 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
de1c301e | 2058 | if (r < 0) |
89ffcd2a | 2059 | return -errno; |
de1c301e | 2060 | |
e3017af9 LP |
2061 | return r > 0 ? 1 : 0; |
2062 | } | |
2063 | ||
2064 | int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { | |
2065 | ||
2066 | if (!bus) | |
2067 | return -EINVAL; | |
021a1e78 LP |
2068 | if (bus->state == BUS_UNSET) |
2069 | return -ENOTCONN; | |
e82c9509 | 2070 | if (bus->input_fd < 0) |
e3017af9 LP |
2071 | return -ENOTCONN; |
2072 | if (bus->rqueue_size > 0) | |
2073 | return 0; | |
2074 | ||
2075 | return bus_poll(bus, false, timeout_usec); | |
de1c301e LP |
2076 | } |
2077 | ||
2078 | int sd_bus_flush(sd_bus *bus) { | |
2079 | int r; | |
2080 | ||
2081 | if (!bus) | |
2082 | return -EINVAL; | |
021a1e78 LP |
2083 | if (bus->state == BUS_UNSET) |
2084 | return -ENOTCONN; | |
e82c9509 | 2085 | if (bus->output_fd < 0) |
de1c301e LP |
2086 | return -ENOTCONN; |
2087 | ||
20902f3e | 2088 | r = bus_ensure_running(bus); |
89ffcd2a LP |
2089 | if (r < 0) |
2090 | return r; | |
2091 | ||
2092 | if (bus->wqueue_size <= 0) | |
de1c301e LP |
2093 | return 0; |
2094 | ||
2095 | for (;;) { | |
2096 | r = dispatch_wqueue(bus); | |
2097 | if (r < 0) | |
2098 | return r; | |
2099 | ||
89ffcd2a | 2100 | if (bus->wqueue_size <= 0) |
de1c301e LP |
2101 | return 0; |
2102 | ||
e3017af9 | 2103 | r = bus_poll(bus, false, (uint64_t) -1); |
de1c301e LP |
2104 | if (r < 0) |
2105 | return r; | |
2106 | } | |
2107 | } | |
2108 | ||
52f3ba91 | 2109 | int sd_bus_add_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) { |
de1c301e LP |
2110 | struct filter_callback *f; |
2111 | ||
2112 | if (!bus) | |
2113 | return -EINVAL; | |
2114 | if (!callback) | |
2115 | return -EINVAL; | |
2116 | ||
eba8617e | 2117 | f = new0(struct filter_callback, 1); |
de1c301e LP |
2118 | if (!f) |
2119 | return -ENOMEM; | |
2120 | f->callback = callback; | |
2121 | f->userdata = userdata; | |
2122 | ||
7286037f | 2123 | bus->filter_callbacks_modified = true; |
de1c301e LP |
2124 | LIST_PREPEND(struct filter_callback, callbacks, bus->filter_callbacks, f); |
2125 | return 0; | |
2126 | } | |
2127 | ||
52f3ba91 | 2128 | int sd_bus_remove_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) { |
de1c301e LP |
2129 | struct filter_callback *f; |
2130 | ||
2131 | if (!bus) | |
2132 | return -EINVAL; | |
2133 | if (!callback) | |
2134 | return -EINVAL; | |
2135 | ||
2136 | LIST_FOREACH(callbacks, f, bus->filter_callbacks) { | |
2137 | if (f->callback == callback && f->userdata == userdata) { | |
7286037f | 2138 | bus->filter_callbacks_modified = true; |
de1c301e LP |
2139 | LIST_REMOVE(struct filter_callback, callbacks, bus->filter_callbacks, f); |
2140 | free(f); | |
2141 | return 1; | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | return 0; | |
2146 | } | |
a652755d LP |
2147 | |
2148 | static int bus_add_object( | |
2149 | sd_bus *bus, | |
2150 | bool fallback, | |
2151 | const char *path, | |
52f3ba91 | 2152 | sd_bus_message_handler_t callback, |
a652755d LP |
2153 | void *userdata) { |
2154 | ||
2155 | struct object_callback *c; | |
2156 | int r; | |
2157 | ||
2158 | if (!bus) | |
2159 | return -EINVAL; | |
2160 | if (!path) | |
2161 | return -EINVAL; | |
2162 | if (!callback) | |
2163 | return -EINVAL; | |
2164 | ||
2165 | r = hashmap_ensure_allocated(&bus->object_callbacks, string_hash_func, string_compare_func); | |
2166 | if (r < 0) | |
2167 | return r; | |
2168 | ||
eba8617e | 2169 | c = new0(struct object_callback, 1); |
a652755d LP |
2170 | if (!c) |
2171 | return -ENOMEM; | |
2172 | ||
2173 | c->path = strdup(path); | |
531991b6 | 2174 | if (!c->path) { |
a652755d LP |
2175 | free(c); |
2176 | return -ENOMEM; | |
2177 | } | |
2178 | ||
2179 | c->callback = callback; | |
2180 | c->userdata = userdata; | |
2181 | c->is_fallback = fallback; | |
2182 | ||
7286037f | 2183 | bus->object_callbacks_modified = true; |
a652755d LP |
2184 | r = hashmap_put(bus->object_callbacks, c->path, c); |
2185 | if (r < 0) { | |
2186 | free(c->path); | |
2187 | free(c); | |
2188 | return r; | |
2189 | } | |
2190 | ||
2191 | return 0; | |
2192 | } | |
2193 | ||
2194 | static int bus_remove_object( | |
2195 | sd_bus *bus, | |
2196 | bool fallback, | |
2197 | const char *path, | |
52f3ba91 | 2198 | sd_bus_message_handler_t callback, |
a652755d LP |
2199 | void *userdata) { |
2200 | ||
2201 | struct object_callback *c; | |
2202 | ||
2203 | if (!bus) | |
2204 | return -EINVAL; | |
2205 | if (!path) | |
2206 | return -EINVAL; | |
2207 | if (!callback) | |
2208 | return -EINVAL; | |
2209 | ||
2210 | c = hashmap_get(bus->object_callbacks, path); | |
2211 | if (!c) | |
2212 | return 0; | |
2213 | ||
2214 | if (c->callback != callback || c->userdata != userdata || c->is_fallback != fallback) | |
2215 | return 0; | |
2216 | ||
7286037f | 2217 | bus->object_callbacks_modified = true; |
a652755d LP |
2218 | assert_se(c == hashmap_remove(bus->object_callbacks, c->path)); |
2219 | ||
2220 | free(c->path); | |
2221 | free(c); | |
2222 | ||
2223 | return 1; | |
2224 | } | |
2225 | ||
52f3ba91 | 2226 | int sd_bus_add_object(sd_bus *bus, const char *path, sd_bus_message_handler_t callback, void *userdata) { |
a652755d LP |
2227 | return bus_add_object(bus, false, path, callback, userdata); |
2228 | } | |
2229 | ||
52f3ba91 | 2230 | int sd_bus_remove_object(sd_bus *bus, const char *path, sd_bus_message_handler_t callback, void *userdata) { |
a652755d LP |
2231 | return bus_remove_object(bus, false, path, callback, userdata); |
2232 | } | |
2233 | ||
52f3ba91 | 2234 | int sd_bus_add_fallback(sd_bus *bus, const char *prefix, sd_bus_message_handler_t callback, void *userdata) { |
a652755d LP |
2235 | return bus_add_object(bus, true, prefix, callback, userdata); |
2236 | } | |
2237 | ||
52f3ba91 | 2238 | int sd_bus_remove_fallback(sd_bus *bus, const char *prefix, sd_bus_message_handler_t callback, void *userdata) { |
a652755d LP |
2239 | return bus_remove_object(bus, true, prefix, callback, userdata); |
2240 | } | |
392d5b37 | 2241 | |
52f3ba91 | 2242 | int sd_bus_add_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) { |
392d5b37 LP |
2243 | int r = 0; |
2244 | ||
2245 | if (!bus) | |
2246 | return -EINVAL; | |
2247 | if (!match) | |
2248 | return -EINVAL; | |
2249 | ||
2250 | if (bus->bus_client) { | |
2251 | r = bus_add_match_internal(bus, match); | |
2252 | if (r < 0) | |
2253 | return r; | |
2254 | } | |
2255 | ||
2256 | if (callback) { | |
7286037f | 2257 | bus->match_callbacks_modified = true; |
392d5b37 LP |
2258 | r = bus_match_add(&bus->match_callbacks, match, callback, userdata, NULL); |
2259 | if (r < 0) { | |
2260 | ||
2261 | if (bus->bus_client) | |
2262 | bus_remove_match_internal(bus, match); | |
2263 | } | |
2264 | } | |
2265 | ||
2266 | return r; | |
2267 | } | |
2268 | ||
52f3ba91 | 2269 | int sd_bus_remove_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) { |
392d5b37 LP |
2270 | int r = 0, q = 0; |
2271 | ||
2272 | if (!bus) | |
2273 | return -EINVAL; | |
2274 | if (!match) | |
2275 | return -EINVAL; | |
2276 | ||
2277 | if (bus->bus_client) | |
2278 | r = bus_remove_match_internal(bus, match); | |
2279 | ||
7286037f LP |
2280 | if (callback) { |
2281 | bus->match_callbacks_modified = true; | |
392d5b37 | 2282 | q = bus_match_remove(&bus->match_callbacks, match, callback, userdata); |
7286037f | 2283 | } |
392d5b37 LP |
2284 | |
2285 | if (r < 0) | |
2286 | return r; | |
2287 | return q; | |
2288 | } | |
917b5dc7 LP |
2289 | |
2290 | int sd_bus_emit_signal( | |
2291 | sd_bus *bus, | |
2292 | const char *path, | |
2293 | const char *interface, | |
2294 | const char *member, | |
2295 | const char *types, ...) { | |
2296 | ||
2297 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2298 | va_list ap; | |
2299 | int r; | |
2300 | ||
2301 | if (!bus) | |
2302 | return -EINVAL; | |
2303 | ||
2304 | r = sd_bus_message_new_signal(bus, path, interface, member, &m); | |
2305 | if (r < 0) | |
2306 | return r; | |
2307 | ||
2308 | va_start(ap, types); | |
2309 | r = bus_message_append_ap(m, types, ap); | |
2310 | va_end(ap); | |
2311 | if (r < 0) | |
2312 | return r; | |
2313 | ||
2314 | return sd_bus_send(bus, m, NULL); | |
2315 | } | |
2316 | ||
2317 | int sd_bus_call_method( | |
2318 | sd_bus *bus, | |
2319 | const char *destination, | |
2320 | const char *path, | |
2321 | const char *interface, | |
2322 | const char *member, | |
2323 | sd_bus_error *error, | |
2324 | sd_bus_message **reply, | |
2325 | const char *types, ...) { | |
2326 | ||
2327 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2328 | va_list ap; | |
2329 | int r; | |
2330 | ||
2331 | if (!bus) | |
2332 | return -EINVAL; | |
2333 | ||
2334 | r = sd_bus_message_new_method_call(bus, destination, path, interface, member, &m); | |
2335 | if (r < 0) | |
2336 | return r; | |
2337 | ||
2338 | va_start(ap, types); | |
2339 | r = bus_message_append_ap(m, types, ap); | |
2340 | va_end(ap); | |
2341 | if (r < 0) | |
2342 | return r; | |
2343 | ||
2344 | return sd_bus_send_with_reply_and_block(bus, m, 0, error, reply); | |
2345 | } | |
f10dda3b LP |
2346 | |
2347 | int sd_bus_reply_method_return( | |
2348 | sd_bus *bus, | |
2349 | sd_bus_message *call, | |
2350 | const char *types, ...) { | |
2351 | ||
2352 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2353 | va_list ap; | |
2354 | int r; | |
2355 | ||
2356 | if (!bus) | |
2357 | return -EINVAL; | |
2358 | if (!call) | |
2359 | return -EINVAL; | |
2360 | if (!call->sealed) | |
2361 | return -EPERM; | |
2362 | if (call->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) | |
2363 | return -EINVAL; | |
2364 | ||
2365 | if (call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) | |
2366 | return 0; | |
2367 | ||
2368 | r = sd_bus_message_new_method_return(bus, call, &m); | |
2369 | if (r < 0) | |
2370 | return r; | |
2371 | ||
2372 | va_start(ap, types); | |
2373 | r = bus_message_append_ap(m, types, ap); | |
2374 | va_end(ap); | |
2375 | if (r < 0) | |
2376 | return r; | |
2377 | ||
2378 | return sd_bus_send(bus, m, NULL); | |
2379 | } | |
2380 | ||
2381 | int sd_bus_reply_method_error( | |
2382 | sd_bus *bus, | |
2383 | sd_bus_message *call, | |
2384 | const sd_bus_error *e) { | |
2385 | ||
2386 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2387 | int r; | |
2388 | ||
2389 | if (!bus) | |
2390 | return -EINVAL; | |
2391 | if (!call) | |
2392 | return -EINVAL; | |
2393 | if (!call->sealed) | |
2394 | return -EPERM; | |
2395 | if (call->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) | |
2396 | return -EINVAL; | |
2397 | if (!sd_bus_error_is_set(e)) | |
2398 | return -EINVAL; | |
2399 | ||
2400 | if (call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) | |
2401 | return 0; | |
2402 | ||
2403 | r = sd_bus_message_new_method_error(bus, call, e, &m); | |
2404 | if (r < 0) | |
2405 | return r; | |
2406 | ||
2407 | return sd_bus_send(bus, m, NULL); | |
2408 | } |