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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> | |
63edf05e | 29 | #include <sys/mman.h> |
45fbe937 | 30 | #include <pthread.h> |
de1c301e LP |
31 | |
32 | #include "util.h" | |
33 | #include "macro.h" | |
2fd9ae2e | 34 | #include "strv.h" |
0a72c2bd | 35 | #include "set.h" |
6c03089c | 36 | #include "missing.h" |
de1c301e LP |
37 | |
38 | #include "sd-bus.h" | |
39 | #include "bus-internal.h" | |
40 | #include "bus-message.h" | |
41 | #include "bus-type.h" | |
a7e3212d | 42 | #include "bus-socket.h" |
6629161f | 43 | #include "bus-kernel.h" |
392d5b37 | 44 | #include "bus-control.h" |
29ddb38f LP |
45 | #include "bus-introspect.h" |
46 | #include "bus-signature.h" | |
992c052c | 47 | #include "bus-objects.h" |
de1c301e | 48 | |
e3017af9 LP |
49 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
50 | ||
f54514f3 LP |
51 | static void bus_close_fds(sd_bus *b) { |
52 | assert(b); | |
53 | ||
54 | if (b->input_fd >= 0) | |
55 | close_nointr_nofail(b->input_fd); | |
56 | ||
57 | if (b->output_fd >= 0 && b->output_fd != b->input_fd) | |
58 | close_nointr_nofail(b->output_fd); | |
59 | ||
60 | b->input_fd = b->output_fd = -1; | |
61 | } | |
62 | ||
29ddb38f LP |
63 | static void bus_node_destroy(sd_bus *b, struct node *n) { |
64 | struct node_callback *c; | |
65 | struct node_vtable *v; | |
66 | struct node_enumerator *e; | |
67 | ||
68 | assert(b); | |
69 | ||
70 | if (!n) | |
71 | return; | |
72 | ||
73 | while (n->child) | |
74 | bus_node_destroy(b, n->child); | |
75 | ||
76 | while ((c = n->callbacks)) { | |
71fda00f | 77 | LIST_REMOVE(callbacks, n->callbacks, c); |
29ddb38f LP |
78 | free(c); |
79 | } | |
80 | ||
81 | while ((v = n->vtables)) { | |
71fda00f | 82 | LIST_REMOVE(vtables, n->vtables, v); |
29ddb38f LP |
83 | free(v->interface); |
84 | free(v); | |
85 | } | |
86 | ||
87 | while ((e = n->enumerators)) { | |
71fda00f | 88 | LIST_REMOVE(enumerators, n->enumerators, e); |
29ddb38f LP |
89 | free(e); |
90 | } | |
91 | ||
92 | if (n->parent) | |
71fda00f | 93 | LIST_REMOVE(siblings, n->parent->child, n); |
29ddb38f LP |
94 | |
95 | assert_se(hashmap_remove(b->nodes, n->path) == n); | |
96 | free(n->path); | |
97 | free(n); | |
98 | } | |
99 | ||
de1c301e LP |
100 | static void bus_free(sd_bus *b) { |
101 | struct filter_callback *f; | |
29ddb38f | 102 | struct node *n; |
89ffcd2a | 103 | unsigned i; |
de1c301e LP |
104 | |
105 | assert(b); | |
106 | ||
f54514f3 | 107 | bus_close_fds(b); |
de1c301e | 108 | |
63edf05e LP |
109 | if (b->kdbus_buffer) |
110 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
111 | ||
de1c301e | 112 | free(b->rbuffer); |
89ffcd2a | 113 | free(b->unique_name); |
2181a7f5 | 114 | free(b->auth_buffer); |
89ffcd2a | 115 | free(b->address); |
e9a967f9 | 116 | free(b->kernel); |
89ffcd2a | 117 | |
2fd9ae2e LP |
118 | free(b->exec_path); |
119 | strv_free(b->exec_argv); | |
120 | ||
2c93b4ef LP |
121 | close_many(b->fds, b->n_fds); |
122 | free(b->fds); | |
123 | ||
89ffcd2a LP |
124 | for (i = 0; i < b->rqueue_size; i++) |
125 | sd_bus_message_unref(b->rqueue[i]); | |
de1c301e | 126 | free(b->rqueue); |
89ffcd2a LP |
127 | |
128 | for (i = 0; i < b->wqueue_size; i++) | |
129 | sd_bus_message_unref(b->wqueue[i]); | |
de1c301e | 130 | free(b->wqueue); |
de1c301e LP |
131 | |
132 | hashmap_free_free(b->reply_callbacks); | |
e3017af9 | 133 | prioq_free(b->reply_callbacks_prioq); |
de1c301e LP |
134 | |
135 | while ((f = b->filter_callbacks)) { | |
71fda00f | 136 | LIST_REMOVE(callbacks, b->filter_callbacks, f); |
de1c301e LP |
137 | free(f); |
138 | } | |
139 | ||
392d5b37 LP |
140 | bus_match_free(&b->match_callbacks); |
141 | ||
29ddb38f LP |
142 | hashmap_free_free(b->vtable_methods); |
143 | hashmap_free_free(b->vtable_properties); | |
144 | ||
145 | while ((n = hashmap_first(b->nodes))) | |
146 | bus_node_destroy(b, n); | |
147 | ||
148 | hashmap_free(b->nodes); | |
149 | ||
bc7fd8cd LP |
150 | bus_kernel_flush_memfd(b); |
151 | ||
45fbe937 LP |
152 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
153 | ||
de1c301e LP |
154 | free(b); |
155 | } | |
156 | ||
021a1e78 | 157 | int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
158 | sd_bus *r; |
159 | ||
021a1e78 LP |
160 | if (!ret) |
161 | return -EINVAL; | |
162 | ||
de1c301e LP |
163 | r = new0(sd_bus, 1); |
164 | if (!r) | |
021a1e78 | 165 | return -ENOMEM; |
de1c301e | 166 | |
e4ee6e5c | 167 | r->n_ref = REFCNT_INIT; |
e82c9509 | 168 | r->input_fd = r->output_fd = -1; |
de1c301e | 169 | r->message_version = 1; |
264ad849 | 170 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d5a2b9a6 | 171 | r->original_pid = getpid(); |
de1c301e | 172 | |
45fbe937 LP |
173 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
174 | ||
de1c301e LP |
175 | /* We guarantee that wqueue always has space for at least one |
176 | * entry */ | |
177 | r->wqueue = new(sd_bus_message*, 1); | |
178 | if (!r->wqueue) { | |
179 | free(r); | |
021a1e78 | 180 | return -ENOMEM; |
de1c301e LP |
181 | } |
182 | ||
021a1e78 LP |
183 | *ret = r; |
184 | return 0; | |
185 | } | |
186 | ||
187 | int sd_bus_set_address(sd_bus *bus, const char *address) { | |
188 | char *a; | |
189 | ||
190 | if (!bus) | |
191 | return -EINVAL; | |
192 | if (bus->state != BUS_UNSET) | |
193 | return -EPERM; | |
194 | if (!address) | |
195 | return -EINVAL; | |
d5a2b9a6 LP |
196 | if (bus_pid_changed(bus)) |
197 | return -ECHILD; | |
021a1e78 LP |
198 | |
199 | a = strdup(address); | |
200 | if (!a) | |
201 | return -ENOMEM; | |
202 | ||
203 | free(bus->address); | |
204 | bus->address = a; | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
e82c9509 | 209 | int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
021a1e78 LP |
210 | if (!bus) |
211 | return -EINVAL; | |
212 | if (bus->state != BUS_UNSET) | |
213 | return -EPERM; | |
e82c9509 LP |
214 | if (input_fd < 0) |
215 | return -EINVAL; | |
216 | if (output_fd < 0) | |
021a1e78 | 217 | return -EINVAL; |
d5a2b9a6 LP |
218 | if (bus_pid_changed(bus)) |
219 | return -ECHILD; | |
021a1e78 | 220 | |
e82c9509 LP |
221 | bus->input_fd = input_fd; |
222 | bus->output_fd = output_fd; | |
021a1e78 LP |
223 | return 0; |
224 | } | |
225 | ||
2fd9ae2e LP |
226 | int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
227 | char *p, **a; | |
228 | ||
229 | if (!bus) | |
230 | return -EINVAL; | |
231 | if (bus->state != BUS_UNSET) | |
232 | return -EPERM; | |
233 | if (!path) | |
234 | return -EINVAL; | |
235 | if (strv_isempty(argv)) | |
236 | return -EINVAL; | |
d5a2b9a6 LP |
237 | if (bus_pid_changed(bus)) |
238 | return -ECHILD; | |
2fd9ae2e LP |
239 | |
240 | p = strdup(path); | |
241 | if (!p) | |
242 | return -ENOMEM; | |
243 | ||
244 | a = strv_copy(argv); | |
245 | if (!a) { | |
246 | free(p); | |
247 | return -ENOMEM; | |
248 | } | |
249 | ||
250 | free(bus->exec_path); | |
251 | strv_free(bus->exec_argv); | |
252 | ||
253 | bus->exec_path = p; | |
254 | bus->exec_argv = a; | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
94bbf1ba | 259 | int sd_bus_set_bus_client(sd_bus *bus, int b) { |
021a1e78 LP |
260 | if (!bus) |
261 | return -EINVAL; | |
262 | if (bus->state != BUS_UNSET) | |
263 | return -EPERM; | |
d5a2b9a6 LP |
264 | if (bus_pid_changed(bus)) |
265 | return -ECHILD; | |
021a1e78 | 266 | |
94bbf1ba | 267 | bus->bus_client = !!b; |
021a1e78 LP |
268 | return 0; |
269 | } | |
270 | ||
264ad849 | 271 | int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
021a1e78 LP |
272 | if (!bus) |
273 | return -EINVAL; | |
274 | if (bus->state != BUS_UNSET) | |
275 | return -EPERM; | |
d5a2b9a6 LP |
276 | if (bus_pid_changed(bus)) |
277 | return -ECHILD; | |
021a1e78 | 278 | |
264ad849 LP |
279 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
280 | return 0; | |
281 | } | |
282 | ||
283 | int sd_bus_negotiate_attach_comm(sd_bus *bus, int b) { | |
284 | if (!bus) | |
285 | return -EINVAL; | |
286 | if (bus->state != BUS_UNSET) | |
287 | return -EPERM; | |
288 | if (bus_pid_changed(bus)) | |
289 | return -ECHILD; | |
290 | ||
291 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_COMM, b); | |
292 | return 0; | |
293 | } | |
294 | ||
295 | int sd_bus_negotiate_attach_exe(sd_bus *bus, int b) { | |
296 | if (!bus) | |
297 | return -EINVAL; | |
298 | if (bus->state != BUS_UNSET) | |
299 | return -EPERM; | |
300 | if (bus_pid_changed(bus)) | |
301 | return -ECHILD; | |
302 | ||
303 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_EXE, b); | |
304 | return 0; | |
305 | } | |
306 | ||
307 | int sd_bus_negotiate_attach_cmdline(sd_bus *bus, int b) { | |
308 | if (!bus) | |
309 | return -EINVAL; | |
310 | if (bus->state != BUS_UNSET) | |
311 | return -EPERM; | |
312 | if (bus_pid_changed(bus)) | |
313 | return -ECHILD; | |
314 | ||
315 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CMDLINE, b); | |
316 | return 0; | |
317 | } | |
318 | ||
319 | int sd_bus_negotiate_attach_cgroup(sd_bus *bus, int b) { | |
320 | if (!bus) | |
321 | return -EINVAL; | |
322 | if (bus->state != BUS_UNSET) | |
323 | return -EPERM; | |
324 | if (bus_pid_changed(bus)) | |
325 | return -ECHILD; | |
326 | ||
327 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CGROUP, b); | |
328 | return 0; | |
329 | } | |
330 | ||
331 | int sd_bus_negotiate_attach_caps(sd_bus *bus, int b) { | |
332 | if (!bus) | |
333 | return -EINVAL; | |
334 | if (bus->state != BUS_UNSET) | |
335 | return -EPERM; | |
336 | if (bus_pid_changed(bus)) | |
337 | return -ECHILD; | |
338 | ||
339 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CAPS, b); | |
340 | return 0; | |
341 | } | |
342 | ||
343 | int sd_bus_negotiate_attach_selinux_context(sd_bus *bus, int b) { | |
344 | if (!bus) | |
345 | return -EINVAL; | |
346 | if (bus->state != BUS_UNSET) | |
347 | return -EPERM; | |
348 | if (bus_pid_changed(bus)) | |
349 | return -ECHILD; | |
350 | ||
351 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_SECLABEL, b); | |
352 | return 0; | |
353 | } | |
354 | ||
355 | int sd_bus_negotiate_attach_audit(sd_bus *bus, int b) { | |
356 | if (!bus) | |
357 | return -EINVAL; | |
358 | if (bus->state != BUS_UNSET) | |
359 | return -EPERM; | |
360 | if (bus_pid_changed(bus)) | |
361 | return -ECHILD; | |
362 | ||
363 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_AUDIT, b); | |
021a1e78 LP |
364 | return 0; |
365 | } | |
de1c301e | 366 | |
98178d39 | 367 | int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
2181a7f5 LP |
368 | if (!bus) |
369 | return -EINVAL; | |
98178d39 | 370 | if (!b && !sd_id128_equal(server_id, SD_ID128_NULL)) |
2181a7f5 LP |
371 | return -EINVAL; |
372 | if (bus->state != BUS_UNSET) | |
373 | return -EPERM; | |
d5a2b9a6 LP |
374 | if (bus_pid_changed(bus)) |
375 | return -ECHILD; | |
2181a7f5 LP |
376 | |
377 | bus->is_server = !!b; | |
98178d39 | 378 | bus->server_id = server_id; |
2181a7f5 LP |
379 | return 0; |
380 | } | |
381 | ||
382 | int sd_bus_set_anonymous(sd_bus *bus, int b) { | |
383 | if (!bus) | |
384 | return -EINVAL; | |
385 | if (bus->state != BUS_UNSET) | |
386 | return -EPERM; | |
d5a2b9a6 LP |
387 | if (bus_pid_changed(bus)) |
388 | return -ECHILD; | |
2181a7f5 LP |
389 | |
390 | bus->anonymous_auth = !!b; | |
391 | return 0; | |
392 | } | |
393 | ||
eb01ba5d | 394 | static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata) { |
de1c301e LP |
395 | const char *s; |
396 | int r; | |
397 | ||
398 | assert(bus); | |
021a1e78 | 399 | assert(bus->state == BUS_HELLO); |
de1c301e LP |
400 | assert(reply); |
401 | ||
eb01ba5d LP |
402 | r = bus_message_to_errno(reply); |
403 | if (r < 0) | |
404 | return r; | |
405 | ||
de1c301e LP |
406 | r = sd_bus_message_read(reply, "s", &s); |
407 | if (r < 0) | |
408 | return r; | |
409 | ||
dafb7591 LP |
410 | if (!service_name_is_valid(s) || s[0] != ':') |
411 | return -EBADMSG; | |
412 | ||
de1c301e LP |
413 | bus->unique_name = strdup(s); |
414 | if (!bus->unique_name) | |
415 | return -ENOMEM; | |
416 | ||
dafb7591 LP |
417 | bus->state = BUS_RUNNING; |
418 | ||
de1c301e LP |
419 | return 1; |
420 | } | |
421 | ||
422 | static int bus_send_hello(sd_bus *bus) { | |
423 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
424 | int r; | |
425 | ||
426 | assert(bus); | |
427 | ||
6629161f | 428 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
429 | return 0; |
430 | ||
de1c301e LP |
431 | r = sd_bus_message_new_method_call( |
432 | bus, | |
433 | "org.freedesktop.DBus", | |
434 | "/", | |
435 | "org.freedesktop.DBus", | |
436 | "Hello", | |
437 | &m); | |
438 | if (r < 0) | |
439 | return r; | |
440 | ||
9d373862 | 441 | return sd_bus_send_with_reply(bus, m, hello_callback, NULL, 0, &bus->hello_serial); |
de1c301e LP |
442 | } |
443 | ||
a7e3212d | 444 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
445 | assert(bus); |
446 | ||
f08838da | 447 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 448 | bus->state = BUS_HELLO; |
e3017af9 | 449 | return 1; |
de1c301e LP |
450 | } |
451 | ||
452 | bus->state = BUS_RUNNING; | |
e3017af9 | 453 | return 1; |
de1c301e LP |
454 | } |
455 | ||
456 | static int parse_address_key(const char **p, const char *key, char **value) { | |
457 | size_t l, n = 0; | |
458 | const char *a; | |
459 | char *r = NULL; | |
460 | ||
461 | assert(p); | |
462 | assert(*p); | |
de1c301e LP |
463 | assert(value); |
464 | ||
2fd9ae2e LP |
465 | if (key) { |
466 | l = strlen(key); | |
467 | if (strncmp(*p, key, l) != 0) | |
468 | return 0; | |
de1c301e | 469 | |
2fd9ae2e LP |
470 | if ((*p)[l] != '=') |
471 | return 0; | |
de1c301e | 472 | |
2fd9ae2e LP |
473 | if (*value) |
474 | return -EINVAL; | |
de1c301e | 475 | |
2fd9ae2e LP |
476 | a = *p + l + 1; |
477 | } else | |
478 | a = *p; | |
479 | ||
480 | while (*a != ';' && *a != ',' && *a != 0) { | |
de1c301e LP |
481 | char c, *t; |
482 | ||
483 | if (*a == '%') { | |
484 | int x, y; | |
485 | ||
486 | x = unhexchar(a[1]); | |
487 | if (x < 0) { | |
488 | free(r); | |
489 | return x; | |
490 | } | |
491 | ||
492 | y = unhexchar(a[2]); | |
493 | if (y < 0) { | |
494 | free(r); | |
495 | return y; | |
496 | } | |
497 | ||
de1c301e | 498 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
499 | a += 3; |
500 | } else { | |
de1c301e | 501 | c = *a; |
89ffcd2a LP |
502 | a++; |
503 | } | |
de1c301e | 504 | |
89ffcd2a | 505 | t = realloc(r, n + 2); |
de1c301e LP |
506 | if (!t) { |
507 | free(r); | |
508 | return -ENOMEM; | |
509 | } | |
510 | ||
511 | r = t; | |
512 | r[n++] = c; | |
513 | } | |
514 | ||
89ffcd2a LP |
515 | if (!r) { |
516 | r = strdup(""); | |
517 | if (!r) | |
518 | return -ENOMEM; | |
519 | } else | |
520 | r[n] = 0; | |
521 | ||
522 | if (*a == ',') | |
523 | a++; | |
524 | ||
de1c301e | 525 | *p = a; |
2fd9ae2e LP |
526 | |
527 | free(*value); | |
de1c301e | 528 | *value = r; |
2fd9ae2e | 529 | |
de1c301e LP |
530 | return 1; |
531 | } | |
532 | ||
533 | static void skip_address_key(const char **p) { | |
534 | assert(p); | |
535 | assert(*p); | |
536 | ||
89ffcd2a LP |
537 | *p += strcspn(*p, ","); |
538 | ||
539 | if (**p == ',') | |
540 | (*p) ++; | |
de1c301e LP |
541 | } |
542 | ||
2fd9ae2e LP |
543 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
544 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
545 | size_t l; | |
de1c301e LP |
546 | int r; |
547 | ||
548 | assert(b); | |
2fd9ae2e LP |
549 | assert(p); |
550 | assert(*p); | |
551 | assert(guid); | |
de1c301e | 552 | |
2fd9ae2e LP |
553 | while (**p != 0 && **p != ';') { |
554 | r = parse_address_key(p, "guid", guid); | |
555 | if (r < 0) | |
556 | return r; | |
557 | else if (r > 0) | |
558 | continue; | |
de1c301e | 559 | |
2fd9ae2e LP |
560 | r = parse_address_key(p, "path", &path); |
561 | if (r < 0) | |
562 | return r; | |
563 | else if (r > 0) | |
564 | continue; | |
de1c301e | 565 | |
2fd9ae2e LP |
566 | r = parse_address_key(p, "abstract", &abstract); |
567 | if (r < 0) | |
568 | return r; | |
569 | else if (r > 0) | |
570 | continue; | |
de1c301e | 571 | |
2fd9ae2e LP |
572 | skip_address_key(p); |
573 | } | |
de1c301e | 574 | |
2fd9ae2e LP |
575 | if (!path && !abstract) |
576 | return -EINVAL; | |
de1c301e | 577 | |
2fd9ae2e LP |
578 | if (path && abstract) |
579 | return -EINVAL; | |
580 | ||
581 | if (path) { | |
582 | l = strlen(path); | |
583 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
584 | return -E2BIG; | |
de1c301e | 585 | |
2fd9ae2e LP |
586 | b->sockaddr.un.sun_family = AF_UNIX; |
587 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
588 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
589 | } else if (abstract) { | |
590 | l = strlen(abstract); | |
591 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
592 | return -E2BIG; | |
593 | ||
594 | b->sockaddr.un.sun_family = AF_UNIX; | |
595 | b->sockaddr.un.sun_path[0] = 0; | |
596 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
597 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
598 | } | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
603 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
604 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 605 | int r; |
b92bea5d ZJS |
606 | struct addrinfo *result, hints = { |
607 | .ai_socktype = SOCK_STREAM, | |
608 | .ai_flags = AI_ADDRCONFIG, | |
609 | }; | |
2fd9ae2e LP |
610 | |
611 | assert(b); | |
612 | assert(p); | |
613 | assert(*p); | |
614 | assert(guid); | |
615 | ||
616 | while (**p != 0 && **p != ';') { | |
617 | r = parse_address_key(p, "guid", guid); | |
618 | if (r < 0) | |
619 | return r; | |
620 | else if (r > 0) | |
621 | continue; | |
622 | ||
623 | r = parse_address_key(p, "host", &host); | |
624 | if (r < 0) | |
625 | return r; | |
626 | else if (r > 0) | |
627 | continue; | |
628 | ||
629 | r = parse_address_key(p, "port", &port); | |
630 | if (r < 0) | |
631 | return r; | |
632 | else if (r > 0) | |
633 | continue; | |
634 | ||
635 | r = parse_address_key(p, "family", &family); | |
636 | if (r < 0) | |
637 | return r; | |
638 | else if (r > 0) | |
639 | continue; | |
640 | ||
641 | skip_address_key(p); | |
642 | } | |
643 | ||
644 | if (!host || !port) | |
645 | return -EINVAL; | |
646 | ||
2fd9ae2e LP |
647 | if (family) { |
648 | if (streq(family, "ipv4")) | |
649 | hints.ai_family = AF_INET; | |
650 | else if (streq(family, "ipv6")) | |
651 | hints.ai_family = AF_INET6; | |
652 | else | |
653 | return -EINVAL; | |
654 | } | |
655 | ||
656 | r = getaddrinfo(host, port, &hints, &result); | |
657 | if (r == EAI_SYSTEM) | |
658 | return -errno; | |
659 | else if (r != 0) | |
660 | return -EADDRNOTAVAIL; | |
661 | ||
662 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
663 | b->sockaddr_size = result->ai_addrlen; | |
664 | ||
665 | freeaddrinfo(result); | |
666 | ||
667 | return 0; | |
668 | } | |
669 | ||
670 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
671 | char *path = NULL; | |
672 | unsigned n_argv = 0, j; | |
673 | char **argv = NULL; | |
674 | int r; | |
675 | ||
676 | assert(b); | |
677 | assert(p); | |
678 | assert(*p); | |
679 | assert(guid); | |
680 | ||
681 | while (**p != 0 && **p != ';') { | |
682 | r = parse_address_key(p, "guid", guid); | |
683 | if (r < 0) | |
684 | goto fail; | |
685 | else if (r > 0) | |
686 | continue; | |
687 | ||
688 | r = parse_address_key(p, "path", &path); | |
689 | if (r < 0) | |
690 | goto fail; | |
691 | else if (r > 0) | |
692 | continue; | |
693 | ||
694 | if (startswith(*p, "argv")) { | |
695 | unsigned ul; | |
696 | ||
697 | errno = 0; | |
698 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 699 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
700 | r = -EINVAL; |
701 | goto fail; | |
702 | } | |
703 | ||
704 | (*p) ++; | |
705 | ||
706 | if (ul >= n_argv) { | |
707 | char **x; | |
708 | ||
709 | x = realloc(argv, sizeof(char*) * (ul + 2)); | |
710 | if (!x) { | |
711 | r = -ENOMEM; | |
712 | goto fail; | |
713 | } | |
714 | ||
715 | memset(x + n_argv, 0, sizeof(char*) * (ul - n_argv + 2)); | |
716 | ||
717 | argv = x; | |
718 | n_argv = ul + 1; | |
719 | } | |
720 | ||
721 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 722 | if (r < 0) |
2fd9ae2e | 723 | goto fail; |
de1c301e | 724 | |
2fd9ae2e | 725 | continue; |
de1c301e LP |
726 | } |
727 | ||
2fd9ae2e LP |
728 | skip_address_key(p); |
729 | } | |
de1c301e | 730 | |
5a0f6033 LP |
731 | if (!path) { |
732 | r = -EINVAL; | |
2fd9ae2e | 733 | goto fail; |
5a0f6033 | 734 | } |
de1c301e | 735 | |
2fd9ae2e LP |
736 | /* Make sure there are no holes in the array, with the |
737 | * exception of argv[0] */ | |
738 | for (j = 1; j < n_argv; j++) | |
739 | if (!argv[j]) { | |
740 | r = -EINVAL; | |
741 | goto fail; | |
742 | } | |
743 | ||
744 | if (argv && argv[0] == NULL) { | |
745 | argv[0] = strdup(path); | |
746 | if (!argv[0]) { | |
747 | r = -ENOMEM; | |
748 | goto fail; | |
749 | } | |
750 | } | |
de1c301e | 751 | |
2fd9ae2e LP |
752 | b->exec_path = path; |
753 | b->exec_argv = argv; | |
754 | return 0; | |
de1c301e | 755 | |
2fd9ae2e LP |
756 | fail: |
757 | for (j = 0; j < n_argv; j++) | |
758 | free(argv[j]); | |
759 | ||
760 | free(argv); | |
761 | free(path); | |
762 | return r; | |
763 | } | |
764 | ||
6629161f LP |
765 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
766 | _cleanup_free_ char *path = NULL; | |
767 | int r; | |
768 | ||
769 | assert(b); | |
770 | assert(p); | |
771 | assert(*p); | |
772 | assert(guid); | |
773 | ||
774 | while (**p != 0 && **p != ';') { | |
775 | r = parse_address_key(p, "guid", guid); | |
776 | if (r < 0) | |
777 | return r; | |
778 | else if (r > 0) | |
779 | continue; | |
780 | ||
781 | r = parse_address_key(p, "path", &path); | |
782 | if (r < 0) | |
783 | return r; | |
784 | else if (r > 0) | |
785 | continue; | |
786 | ||
787 | skip_address_key(p); | |
788 | } | |
789 | ||
790 | if (!path) | |
791 | return -EINVAL; | |
792 | ||
793 | free(b->kernel); | |
794 | b->kernel = path; | |
795 | path = NULL; | |
796 | ||
797 | return 0; | |
798 | } | |
799 | ||
2fd9ae2e LP |
800 | static void bus_reset_parsed_address(sd_bus *b) { |
801 | assert(b); | |
802 | ||
803 | zero(b->sockaddr); | |
804 | b->sockaddr_size = 0; | |
805 | strv_free(b->exec_argv); | |
806 | free(b->exec_path); | |
807 | b->exec_path = NULL; | |
808 | b->exec_argv = NULL; | |
98178d39 | 809 | b->server_id = SD_ID128_NULL; |
6629161f LP |
810 | free(b->kernel); |
811 | b->kernel = NULL; | |
2fd9ae2e LP |
812 | } |
813 | ||
814 | static int bus_parse_next_address(sd_bus *b) { | |
815 | _cleanup_free_ char *guid = NULL; | |
816 | const char *a; | |
817 | int r; | |
818 | ||
819 | assert(b); | |
820 | ||
821 | if (!b->address) | |
822 | return 0; | |
823 | if (b->address[b->address_index] == 0) | |
824 | return 0; | |
825 | ||
826 | bus_reset_parsed_address(b); | |
827 | ||
828 | a = b->address + b->address_index; | |
de1c301e | 829 | |
2fd9ae2e | 830 | while (*a != 0) { |
de1c301e | 831 | |
2fd9ae2e LP |
832 | if (*a == ';') { |
833 | a++; | |
834 | continue; | |
de1c301e LP |
835 | } |
836 | ||
2fd9ae2e LP |
837 | if (startswith(a, "unix:")) { |
838 | a += 5; | |
de1c301e | 839 | |
2fd9ae2e | 840 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
841 | if (r < 0) |
842 | return r; | |
2fd9ae2e | 843 | break; |
de1c301e | 844 | |
2fd9ae2e | 845 | } else if (startswith(a, "tcp:")) { |
de1c301e | 846 | |
2fd9ae2e LP |
847 | a += 4; |
848 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
849 | if (r < 0) |
850 | return r; | |
de1c301e | 851 | |
2fd9ae2e LP |
852 | break; |
853 | ||
854 | } else if (startswith(a, "unixexec:")) { | |
855 | ||
856 | a += 9; | |
857 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
858 | if (r < 0) |
859 | return r; | |
de1c301e | 860 | |
2fd9ae2e | 861 | break; |
de1c301e | 862 | |
6629161f LP |
863 | } else if (startswith(a, "kernel:")) { |
864 | ||
865 | a += 7; | |
866 | r = parse_kernel_address(b, &a, &guid); | |
867 | if (r < 0) | |
868 | return r; | |
869 | ||
870 | break; | |
de1c301e LP |
871 | } |
872 | ||
2fd9ae2e LP |
873 | a = strchr(a, ';'); |
874 | if (!a) | |
875 | return 0; | |
de1c301e LP |
876 | } |
877 | ||
878 | if (guid) { | |
98178d39 | 879 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
880 | if (r < 0) |
881 | return r; | |
882 | } | |
883 | ||
2fd9ae2e | 884 | b->address_index = a - b->address; |
de1c301e LP |
885 | return 1; |
886 | } | |
887 | ||
a7e3212d | 888 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
889 | int r; |
890 | ||
891 | assert(b); | |
892 | ||
893 | for (;;) { | |
e82c9509 | 894 | sd_bus_close(b); |
2fd9ae2e LP |
895 | |
896 | if (b->sockaddr.sa.sa_family != AF_UNSPEC) { | |
a7e3212d LP |
897 | |
898 | r = bus_socket_connect(b); | |
2fd9ae2e LP |
899 | if (r >= 0) |
900 | return r; | |
901 | ||
902 | b->last_connect_error = -r; | |
903 | ||
904 | } else if (b->exec_path) { | |
905 | ||
a7e3212d | 906 | r = bus_socket_exec(b); |
2fd9ae2e LP |
907 | if (r >= 0) |
908 | return r; | |
909 | ||
6629161f LP |
910 | b->last_connect_error = -r; |
911 | } else if (b->kernel) { | |
912 | ||
913 | r = bus_kernel_connect(b); | |
914 | if (r >= 0) | |
915 | return r; | |
916 | ||
2fd9ae2e LP |
917 | b->last_connect_error = -r; |
918 | } | |
919 | ||
920 | r = bus_parse_next_address(b); | |
921 | if (r < 0) | |
922 | return r; | |
923 | if (r == 0) | |
924 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
925 | } |
926 | } | |
927 | ||
a7e3212d LP |
928 | int bus_next_address(sd_bus *b) { |
929 | assert(b); | |
930 | ||
931 | bus_reset_parsed_address(b); | |
932 | return bus_start_address(b); | |
933 | } | |
934 | ||
021a1e78 | 935 | static int bus_start_fd(sd_bus *b) { |
6629161f | 936 | struct stat st; |
021a1e78 LP |
937 | int r; |
938 | ||
939 | assert(b); | |
e82c9509 LP |
940 | assert(b->input_fd >= 0); |
941 | assert(b->output_fd >= 0); | |
021a1e78 | 942 | |
e82c9509 | 943 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
944 | if (r < 0) |
945 | return r; | |
946 | ||
e82c9509 | 947 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
948 | if (r < 0) |
949 | return r; | |
950 | ||
e82c9509 LP |
951 | if (b->input_fd != b->output_fd) { |
952 | r = fd_nonblock(b->output_fd, true); | |
953 | if (r < 0) | |
954 | return r; | |
955 | ||
956 | r = fd_cloexec(b->output_fd, true); | |
957 | if (r < 0) | |
958 | return r; | |
959 | } | |
960 | ||
6629161f LP |
961 | if (fstat(b->input_fd, &st) < 0) |
962 | return -errno; | |
963 | ||
964 | if (S_ISCHR(b->input_fd)) | |
965 | return bus_kernel_take_fd(b); | |
966 | else | |
967 | return bus_socket_take_fd(b); | |
021a1e78 LP |
968 | } |
969 | ||
970 | int sd_bus_start(sd_bus *bus) { | |
971 | int r; | |
972 | ||
973 | if (!bus) | |
974 | return -EINVAL; | |
975 | if (bus->state != BUS_UNSET) | |
976 | return -EPERM; | |
d5a2b9a6 LP |
977 | if (bus_pid_changed(bus)) |
978 | return -ECHILD; | |
021a1e78 LP |
979 | |
980 | bus->state = BUS_OPENING; | |
981 | ||
2181a7f5 LP |
982 | if (bus->is_server && bus->bus_client) |
983 | return -EINVAL; | |
984 | ||
e82c9509 | 985 | if (bus->input_fd >= 0) |
021a1e78 | 986 | r = bus_start_fd(bus); |
6629161f | 987 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel) |
a7e3212d | 988 | r = bus_start_address(bus); |
021a1e78 LP |
989 | else |
990 | return -EINVAL; | |
991 | ||
992 | if (r < 0) | |
993 | return r; | |
994 | ||
995 | return bus_send_hello(bus); | |
996 | } | |
997 | ||
de1c301e LP |
998 | int sd_bus_open_system(sd_bus **ret) { |
999 | const char *e; | |
1000 | sd_bus *b; | |
1001 | int r; | |
1002 | ||
1003 | if (!ret) | |
1004 | return -EINVAL; | |
1005 | ||
021a1e78 LP |
1006 | r = sd_bus_new(&b); |
1007 | if (r < 0) | |
1008 | return r; | |
1009 | ||
6c03089c | 1010 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); |
de1c301e | 1011 | if (e) { |
021a1e78 | 1012 | r = sd_bus_set_address(b, e); |
de1c301e | 1013 | if (r < 0) |
021a1e78 | 1014 | goto fail; |
89ffcd2a | 1015 | } else { |
89ffcd2a LP |
1016 | b->sockaddr.un.sun_family = AF_UNIX; |
1017 | strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); | |
1018 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1; | |
89ffcd2a | 1019 | } |
de1c301e | 1020 | |
94bbf1ba | 1021 | b->bus_client = true; |
021a1e78 LP |
1022 | |
1023 | r = sd_bus_start(b); | |
1024 | if (r < 0) | |
1025 | goto fail; | |
de1c301e LP |
1026 | |
1027 | *ret = b; | |
1028 | return 0; | |
021a1e78 LP |
1029 | |
1030 | fail: | |
1031 | bus_free(b); | |
1032 | return r; | |
de1c301e LP |
1033 | } |
1034 | ||
1035 | int sd_bus_open_user(sd_bus **ret) { | |
1036 | const char *e; | |
1037 | sd_bus *b; | |
1038 | size_t l; | |
1039 | int r; | |
1040 | ||
1041 | if (!ret) | |
1042 | return -EINVAL; | |
1043 | ||
021a1e78 LP |
1044 | r = sd_bus_new(&b); |
1045 | if (r < 0) | |
1046 | return r; | |
1047 | ||
6c03089c | 1048 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
de1c301e | 1049 | if (e) { |
021a1e78 | 1050 | r = sd_bus_set_address(b, e); |
de1c301e | 1051 | if (r < 0) |
021a1e78 | 1052 | goto fail; |
89ffcd2a | 1053 | } else { |
6c03089c | 1054 | e = secure_getenv("XDG_RUNTIME_DIR"); |
021a1e78 LP |
1055 | if (!e) { |
1056 | r = -ENOENT; | |
1057 | goto fail; | |
1058 | } | |
de1c301e | 1059 | |
89ffcd2a | 1060 | l = strlen(e); |
021a1e78 LP |
1061 | if (l + 4 > sizeof(b->sockaddr.un.sun_path)) { |
1062 | r = -E2BIG; | |
1063 | goto fail; | |
1064 | } | |
de1c301e | 1065 | |
89ffcd2a LP |
1066 | b->sockaddr.un.sun_family = AF_UNIX; |
1067 | memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4); | |
1068 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4; | |
de1c301e LP |
1069 | } |
1070 | ||
94bbf1ba | 1071 | b->bus_client = true; |
de1c301e | 1072 | |
021a1e78 | 1073 | r = sd_bus_start(b); |
2571ead1 LP |
1074 | if (r < 0) |
1075 | goto fail; | |
de1c301e LP |
1076 | |
1077 | *ret = b; | |
1078 | return 0; | |
2571ead1 LP |
1079 | |
1080 | fail: | |
021a1e78 | 1081 | bus_free(b); |
2571ead1 | 1082 | return r; |
de1c301e LP |
1083 | } |
1084 | ||
1085 | void sd_bus_close(sd_bus *bus) { | |
1086 | if (!bus) | |
1087 | return; | |
d5a2b9a6 LP |
1088 | if (bus->state == BUS_CLOSED) |
1089 | return; | |
1090 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1091 | return; |
1092 | ||
1093 | bus->state = BUS_CLOSED; | |
e82c9509 | 1094 | |
f54514f3 LP |
1095 | if (!bus->is_kernel) |
1096 | bus_close_fds(bus); | |
1097 | ||
1098 | /* We'll leave the fd open in case this is a kernel bus, since | |
1099 | * there might still be memblocks around that reference this | |
1100 | * bus, and they might need to invoke the | |
1101 | * KDBUS_CMD_MSG_RELEASE ioctl on the fd when they are | |
1102 | * freed. */ | |
de1c301e LP |
1103 | } |
1104 | ||
1105 | sd_bus *sd_bus_ref(sd_bus *bus) { | |
1106 | if (!bus) | |
1107 | return NULL; | |
1108 | ||
e4ee6e5c | 1109 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1110 | |
de1c301e LP |
1111 | return bus; |
1112 | } | |
1113 | ||
1114 | sd_bus *sd_bus_unref(sd_bus *bus) { | |
1115 | if (!bus) | |
1116 | return NULL; | |
1117 | ||
e4ee6e5c | 1118 | if (REFCNT_DEC(bus->n_ref) <= 0) |
de1c301e LP |
1119 | bus_free(bus); |
1120 | ||
1121 | return NULL; | |
1122 | } | |
1123 | ||
e3017af9 LP |
1124 | int sd_bus_is_open(sd_bus *bus) { |
1125 | if (!bus) | |
1126 | return -EINVAL; | |
d5a2b9a6 LP |
1127 | if (bus_pid_changed(bus)) |
1128 | return -ECHILD; | |
e3017af9 | 1129 | |
f54514f3 | 1130 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1131 | } |
1132 | ||
d728d708 LP |
1133 | int sd_bus_can_send(sd_bus *bus, char type) { |
1134 | int r; | |
1135 | ||
de1c301e LP |
1136 | if (!bus) |
1137 | return -EINVAL; | |
f54514f3 | 1138 | if (bus->state == BUS_UNSET) |
021a1e78 | 1139 | return -ENOTCONN; |
d5a2b9a6 LP |
1140 | if (bus_pid_changed(bus)) |
1141 | return -ECHILD; | |
de1c301e | 1142 | |
d728d708 | 1143 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1144 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1145 | return 0; |
1146 | ||
20902f3e | 1147 | r = bus_ensure_running(bus); |
d728d708 LP |
1148 | if (r < 0) |
1149 | return r; | |
de1c301e | 1150 | |
d728d708 LP |
1151 | return bus->can_fds; |
1152 | } | |
1153 | ||
1154 | return bus_type_is_valid(type); | |
de1c301e LP |
1155 | } |
1156 | ||
98178d39 | 1157 | int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) { |
d728d708 | 1158 | int r; |
de1c301e LP |
1159 | |
1160 | if (!bus) | |
1161 | return -EINVAL; | |
98178d39 | 1162 | if (!server_id) |
d728d708 | 1163 | return -EINVAL; |
d5a2b9a6 LP |
1164 | if (bus_pid_changed(bus)) |
1165 | return -ECHILD; | |
de1c301e | 1166 | |
20902f3e | 1167 | r = bus_ensure_running(bus); |
d728d708 LP |
1168 | if (r < 0) |
1169 | return r; | |
de1c301e | 1170 | |
98178d39 | 1171 | *server_id = bus->server_id; |
d728d708 | 1172 | return 0; |
de1c301e LP |
1173 | } |
1174 | ||
1175 | static int bus_seal_message(sd_bus *b, sd_bus_message *m) { | |
1176 | assert(m); | |
1177 | ||
89ffcd2a LP |
1178 | if (m->header->version > b->message_version) |
1179 | return -EPERM; | |
1180 | ||
de1c301e LP |
1181 | if (m->sealed) |
1182 | return 0; | |
1183 | ||
9a17484d | 1184 | return bus_message_seal(m, ++b->serial); |
de1c301e LP |
1185 | } |
1186 | ||
de1c301e | 1187 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1188 | int r, ret = 0; |
de1c301e LP |
1189 | |
1190 | assert(bus); | |
89ffcd2a | 1191 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1192 | |
de1c301e LP |
1193 | while (bus->wqueue_size > 0) { |
1194 | ||
6629161f LP |
1195 | if (bus->is_kernel) |
1196 | r = bus_kernel_write_message(bus, bus->wqueue[0]); | |
1197 | else | |
1198 | r = bus_socket_write_message(bus, bus->wqueue[0], &bus->windex); | |
1199 | ||
de1c301e LP |
1200 | if (r < 0) { |
1201 | sd_bus_close(bus); | |
1202 | return r; | |
1203 | } else if (r == 0) | |
e3017af9 LP |
1204 | /* Didn't do anything this time */ |
1205 | return ret; | |
6629161f | 1206 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1207 | /* Fully written. Let's drop the entry from |
1208 | * the queue. | |
1209 | * | |
1210 | * This isn't particularly optimized, but | |
1211 | * well, this is supposed to be our worst-case | |
1212 | * buffer only, and the socket buffer is | |
1213 | * supposed to be our primary buffer, and if | |
1214 | * it got full, then all bets are off | |
1215 | * anyway. */ | |
1216 | ||
1217 | sd_bus_message_unref(bus->wqueue[0]); | |
1218 | bus->wqueue_size --; | |
1219 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); | |
1220 | bus->windex = 0; | |
1221 | ||
e3017af9 | 1222 | ret = 1; |
de1c301e LP |
1223 | } |
1224 | } | |
1225 | ||
e3017af9 | 1226 | return ret; |
de1c301e LP |
1227 | } |
1228 | ||
1229 | static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) { | |
2bf938c1 | 1230 | sd_bus_message *z = NULL; |
e3017af9 | 1231 | int r, ret = 0; |
de1c301e LP |
1232 | |
1233 | assert(bus); | |
1234 | assert(m); | |
89ffcd2a | 1235 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1236 | |
de1c301e LP |
1237 | if (bus->rqueue_size > 0) { |
1238 | /* Dispatch a queued message */ | |
1239 | ||
1240 | *m = bus->rqueue[0]; | |
1241 | bus->rqueue_size --; | |
1242 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1243 | return 1; | |
1244 | } | |
1245 | ||
1246 | /* Try to read a new message */ | |
e3017af9 | 1247 | do { |
6629161f LP |
1248 | if (bus->is_kernel) |
1249 | r = bus_kernel_read_message(bus, &z); | |
1250 | else | |
1251 | r = bus_socket_read_message(bus, &z); | |
1252 | ||
e3017af9 LP |
1253 | if (r < 0) { |
1254 | sd_bus_close(bus); | |
1255 | return r; | |
1256 | } | |
1257 | if (r == 0) | |
1258 | return ret; | |
de1c301e | 1259 | |
2e8d788c | 1260 | ret = 1; |
e3017af9 LP |
1261 | } while (!z); |
1262 | ||
1263 | *m = z; | |
2e8d788c | 1264 | return ret; |
de1c301e LP |
1265 | } |
1266 | ||
1267 | int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) { | |
1268 | int r; | |
1269 | ||
1270 | if (!bus) | |
1271 | return -EINVAL; | |
f54514f3 | 1272 | if (!BUS_IS_OPEN(bus->state)) |
de1c301e LP |
1273 | return -ENOTCONN; |
1274 | if (!m) | |
1275 | return -EINVAL; | |
d5a2b9a6 LP |
1276 | if (bus_pid_changed(bus)) |
1277 | return -ECHILD; | |
021a1e78 LP |
1278 | |
1279 | if (m->n_fds > 0) { | |
1280 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1281 | if (r < 0) | |
1282 | return r; | |
1283 | if (r == 0) | |
1284 | return -ENOTSUP; | |
1285 | } | |
de1c301e | 1286 | |
29f6aadd LP |
1287 | /* If the serial number isn't kept, then we know that no reply |
1288 | * is expected */ | |
1289 | if (!serial && !m->sealed) | |
1290 | m->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; | |
1291 | ||
de1c301e LP |
1292 | r = bus_seal_message(bus, m); |
1293 | if (r < 0) | |
1294 | return r; | |
1295 | ||
5407f2de LP |
1296 | /* If this is a reply and no reply was requested, then let's |
1297 | * suppress this, if we can */ | |
1298 | if (m->dont_send && !serial) | |
1299 | return 0; | |
1300 | ||
89ffcd2a | 1301 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1302 | size_t idx = 0; |
1303 | ||
6629161f LP |
1304 | if (bus->is_kernel) |
1305 | r = bus_kernel_write_message(bus, m); | |
1306 | else | |
1307 | r = bus_socket_write_message(bus, m, &idx); | |
1308 | ||
de1c301e LP |
1309 | if (r < 0) { |
1310 | sd_bus_close(bus); | |
1311 | return r; | |
6629161f | 1312 | } else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1313 | /* Wasn't fully written. So let's remember how |
1314 | * much was written. Note that the first entry | |
1315 | * of the wqueue array is always allocated so | |
1316 | * that we always can remember how much was | |
1317 | * written. */ | |
1318 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1319 | bus->wqueue_size = 1; | |
1320 | bus->windex = idx; | |
1321 | } | |
1322 | } else { | |
1323 | sd_bus_message **q; | |
1324 | ||
1325 | /* Just append it to the queue. */ | |
1326 | ||
25220239 | 1327 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1328 | return -ENOBUFS; |
1329 | ||
1330 | q = realloc(bus->wqueue, sizeof(sd_bus_message*) * (bus->wqueue_size + 1)); | |
1331 | if (!q) | |
1332 | return -ENOMEM; | |
1333 | ||
1334 | bus->wqueue = q; | |
1335 | q[bus->wqueue_size ++] = sd_bus_message_ref(m); | |
1336 | } | |
1337 | ||
1338 | if (serial) | |
1339 | *serial = BUS_MESSAGE_SERIAL(m); | |
1340 | ||
1341 | return 0; | |
1342 | } | |
1343 | ||
1344 | static usec_t calc_elapse(uint64_t usec) { | |
1345 | if (usec == (uint64_t) -1) | |
1346 | return 0; | |
1347 | ||
1348 | if (usec == 0) | |
e3017af9 | 1349 | usec = BUS_DEFAULT_TIMEOUT; |
de1c301e LP |
1350 | |
1351 | return now(CLOCK_MONOTONIC) + usec; | |
1352 | } | |
1353 | ||
e3017af9 LP |
1354 | static int timeout_compare(const void *a, const void *b) { |
1355 | const struct reply_callback *x = a, *y = b; | |
1356 | ||
1357 | if (x->timeout != 0 && y->timeout == 0) | |
1358 | return -1; | |
1359 | ||
1360 | if (x->timeout == 0 && y->timeout != 0) | |
1361 | return 1; | |
1362 | ||
1363 | if (x->timeout < y->timeout) | |
1364 | return -1; | |
1365 | ||
1366 | if (x->timeout > y->timeout) | |
1367 | return 1; | |
1368 | ||
1369 | return 0; | |
1370 | } | |
1371 | ||
de1c301e LP |
1372 | int sd_bus_send_with_reply( |
1373 | sd_bus *bus, | |
1374 | sd_bus_message *m, | |
52f3ba91 | 1375 | sd_bus_message_handler_t callback, |
de1c301e LP |
1376 | void *userdata, |
1377 | uint64_t usec, | |
1378 | uint64_t *serial) { | |
1379 | ||
1380 | struct reply_callback *c; | |
1381 | int r; | |
1382 | ||
1383 | if (!bus) | |
1384 | return -EINVAL; | |
f54514f3 | 1385 | if (!BUS_IS_OPEN(bus->state)) |
de1c301e LP |
1386 | return -ENOTCONN; |
1387 | if (!m) | |
1388 | return -EINVAL; | |
1389 | if (!callback) | |
1390 | return -EINVAL; | |
89ffcd2a | 1391 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) |
de1c301e | 1392 | return -EINVAL; |
89ffcd2a LP |
1393 | if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) |
1394 | return -EINVAL; | |
d5a2b9a6 LP |
1395 | if (bus_pid_changed(bus)) |
1396 | return -ECHILD; | |
89ffcd2a LP |
1397 | |
1398 | r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func); | |
1399 | if (r < 0) | |
1400 | return r; | |
de1c301e | 1401 | |
e3017af9 LP |
1402 | if (usec != (uint64_t) -1) { |
1403 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); | |
1404 | if (r < 0) | |
1405 | return r; | |
1406 | } | |
1407 | ||
de1c301e LP |
1408 | r = bus_seal_message(bus, m); |
1409 | if (r < 0) | |
1410 | return r; | |
1411 | ||
eba8617e | 1412 | c = new0(struct reply_callback, 1); |
de1c301e LP |
1413 | if (!c) |
1414 | return -ENOMEM; | |
1415 | ||
1416 | c->callback = callback; | |
1417 | c->userdata = userdata; | |
1418 | c->serial = BUS_MESSAGE_SERIAL(m); | |
1419 | c->timeout = calc_elapse(usec); | |
1420 | ||
1421 | r = hashmap_put(bus->reply_callbacks, &c->serial, c); | |
1422 | if (r < 0) { | |
1423 | free(c); | |
1424 | return r; | |
1425 | } | |
1426 | ||
e3017af9 LP |
1427 | if (c->timeout != 0) { |
1428 | r = prioq_put(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1429 | if (r < 0) { | |
1430 | c->timeout = 0; | |
1431 | sd_bus_send_with_reply_cancel(bus, c->serial); | |
1432 | return r; | |
1433 | } | |
1434 | } | |
1435 | ||
de1c301e LP |
1436 | r = sd_bus_send(bus, m, serial); |
1437 | if (r < 0) { | |
e3017af9 | 1438 | sd_bus_send_with_reply_cancel(bus, c->serial); |
de1c301e LP |
1439 | return r; |
1440 | } | |
1441 | ||
1442 | return r; | |
1443 | } | |
1444 | ||
1445 | int sd_bus_send_with_reply_cancel(sd_bus *bus, uint64_t serial) { | |
e3017af9 | 1446 | struct reply_callback *c; |
de1c301e LP |
1447 | |
1448 | if (!bus) | |
1449 | return -EINVAL; | |
1450 | if (serial == 0) | |
1451 | return -EINVAL; | |
d5a2b9a6 LP |
1452 | if (bus_pid_changed(bus)) |
1453 | return -ECHILD; | |
de1c301e LP |
1454 | |
1455 | c = hashmap_remove(bus->reply_callbacks, &serial); | |
1456 | if (!c) | |
1457 | return 0; | |
1458 | ||
e3017af9 LP |
1459 | if (c->timeout != 0) |
1460 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1461 | ||
de1c301e LP |
1462 | free(c); |
1463 | return 1; | |
1464 | } | |
1465 | ||
20902f3e | 1466 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1467 | int r; |
1468 | ||
1469 | assert(bus); | |
1470 | ||
f54514f3 | 1471 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED) |
021a1e78 | 1472 | return -ENOTCONN; |
d728d708 LP |
1473 | if (bus->state == BUS_RUNNING) |
1474 | return 1; | |
89ffcd2a LP |
1475 | |
1476 | for (;;) { | |
1477 | r = sd_bus_process(bus, NULL); | |
1478 | if (r < 0) | |
1479 | return r; | |
d728d708 LP |
1480 | if (bus->state == BUS_RUNNING) |
1481 | return 1; | |
e3017af9 LP |
1482 | if (r > 0) |
1483 | continue; | |
89ffcd2a LP |
1484 | |
1485 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1486 | if (r < 0) | |
1487 | return r; | |
1488 | } | |
1489 | } | |
1490 | ||
de1c301e LP |
1491 | int sd_bus_send_with_reply_and_block( |
1492 | sd_bus *bus, | |
1493 | sd_bus_message *m, | |
1494 | uint64_t usec, | |
1495 | sd_bus_error *error, | |
1496 | sd_bus_message **reply) { | |
1497 | ||
1498 | int r; | |
1499 | usec_t timeout; | |
1500 | uint64_t serial; | |
1501 | bool room = false; | |
1502 | ||
1503 | if (!bus) | |
1504 | return -EINVAL; | |
f54514f3 | 1505 | if (!BUS_IS_OPEN(bus->state)) |
021a1e78 | 1506 | return -ENOTCONN; |
de1c301e LP |
1507 | if (!m) |
1508 | return -EINVAL; | |
89ffcd2a | 1509 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) |
de1c301e | 1510 | return -EINVAL; |
89ffcd2a | 1511 | if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) |
de1c301e | 1512 | return -EINVAL; |
89ffcd2a LP |
1513 | if (bus_error_is_dirty(error)) |
1514 | return -EINVAL; | |
d5a2b9a6 LP |
1515 | if (bus_pid_changed(bus)) |
1516 | return -ECHILD; | |
89ffcd2a | 1517 | |
20902f3e | 1518 | r = bus_ensure_running(bus); |
89ffcd2a LP |
1519 | if (r < 0) |
1520 | return r; | |
de1c301e LP |
1521 | |
1522 | r = sd_bus_send(bus, m, &serial); | |
1523 | if (r < 0) | |
1524 | return r; | |
1525 | ||
1526 | timeout = calc_elapse(usec); | |
1527 | ||
1528 | for (;;) { | |
1529 | usec_t left; | |
e3017af9 | 1530 | sd_bus_message *incoming = NULL; |
de1c301e LP |
1531 | |
1532 | if (!room) { | |
1533 | sd_bus_message **q; | |
1534 | ||
25220239 LP |
1535 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
1536 | return -ENOBUFS; | |
1537 | ||
de1c301e LP |
1538 | /* Make sure there's room for queuing this |
1539 | * locally, before we read the message */ | |
1540 | ||
1541 | q = realloc(bus->rqueue, (bus->rqueue_size + 1) * sizeof(sd_bus_message*)); | |
1542 | if (!q) | |
1543 | return -ENOMEM; | |
1544 | ||
1545 | bus->rqueue = q; | |
1546 | room = true; | |
1547 | } | |
1548 | ||
6629161f LP |
1549 | if (bus->is_kernel) |
1550 | r = bus_kernel_read_message(bus, &incoming); | |
1551 | else | |
1552 | r = bus_socket_read_message(bus, &incoming); | |
de1c301e LP |
1553 | if (r < 0) |
1554 | return r; | |
e3017af9 | 1555 | if (incoming) { |
89ffcd2a | 1556 | |
de1c301e LP |
1557 | if (incoming->reply_serial == serial) { |
1558 | /* Found a match! */ | |
1559 | ||
1560 | if (incoming->header->type == SD_BUS_MESSAGE_TYPE_METHOD_RETURN) { | |
b7f247e0 LP |
1561 | |
1562 | if (reply) | |
1563 | *reply = incoming; | |
1564 | else | |
1565 | sd_bus_message_unref(incoming); | |
1566 | ||
de1c301e LP |
1567 | return 0; |
1568 | } | |
1569 | ||
1570 | if (incoming->header->type == SD_BUS_MESSAGE_TYPE_METHOD_ERROR) { | |
1571 | int k; | |
1572 | ||
1573 | r = sd_bus_error_copy(error, &incoming->error); | |
1574 | if (r < 0) { | |
1575 | sd_bus_message_unref(incoming); | |
1576 | return r; | |
1577 | } | |
1578 | ||
1579 | k = bus_error_to_errno(&incoming->error); | |
1580 | sd_bus_message_unref(incoming); | |
1581 | return k; | |
1582 | } | |
1583 | ||
1584 | sd_bus_message_unref(incoming); | |
1585 | return -EIO; | |
1586 | } | |
1587 | ||
1588 | /* There's already guaranteed to be room for | |
1589 | * this, so need to resize things here */ | |
1590 | bus->rqueue[bus->rqueue_size ++] = incoming; | |
1591 | room = false; | |
1592 | ||
1593 | /* Try to read more, right-away */ | |
1594 | continue; | |
1595 | } | |
e3017af9 LP |
1596 | if (r != 0) |
1597 | continue; | |
de1c301e LP |
1598 | |
1599 | if (timeout > 0) { | |
1600 | usec_t n; | |
1601 | ||
1602 | n = now(CLOCK_MONOTONIC); | |
1603 | if (n >= timeout) | |
1604 | return -ETIMEDOUT; | |
1605 | ||
1606 | left = timeout - n; | |
1607 | } else | |
1608 | left = (uint64_t) -1; | |
1609 | ||
e3017af9 | 1610 | r = bus_poll(bus, true, left); |
de1c301e LP |
1611 | if (r < 0) |
1612 | return r; | |
1613 | ||
1614 | r = dispatch_wqueue(bus); | |
1615 | if (r < 0) | |
1616 | return r; | |
1617 | } | |
1618 | } | |
1619 | ||
1620 | int sd_bus_get_fd(sd_bus *bus) { | |
1621 | if (!bus) | |
1622 | return -EINVAL; | |
f54514f3 | 1623 | if (!BUS_IS_OPEN(bus->state)) |
89ffcd2a | 1624 | return -ENOTCONN; |
e82c9509 LP |
1625 | if (bus->input_fd != bus->output_fd) |
1626 | return -EPERM; | |
d5a2b9a6 LP |
1627 | if (bus_pid_changed(bus)) |
1628 | return -ECHILD; | |
de1c301e | 1629 | |
e82c9509 | 1630 | return bus->input_fd; |
de1c301e LP |
1631 | } |
1632 | ||
1633 | int sd_bus_get_events(sd_bus *bus) { | |
1634 | int flags = 0; | |
1635 | ||
1636 | if (!bus) | |
1637 | return -EINVAL; | |
f54514f3 | 1638 | if (!BUS_IS_OPEN(bus->state)) |
89ffcd2a | 1639 | return -ENOTCONN; |
d5a2b9a6 LP |
1640 | if (bus_pid_changed(bus)) |
1641 | return -ECHILD; | |
de1c301e LP |
1642 | |
1643 | if (bus->state == BUS_OPENING) | |
1644 | flags |= POLLOUT; | |
89ffcd2a LP |
1645 | else if (bus->state == BUS_AUTHENTICATING) { |
1646 | ||
2181a7f5 | 1647 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
1648 | flags |= POLLOUT; |
1649 | ||
1650 | flags |= POLLIN; | |
1651 | ||
1652 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
1653 | if (bus->rqueue_size <= 0) |
1654 | flags |= POLLIN; | |
1655 | if (bus->wqueue_size > 0) | |
1656 | flags |= POLLOUT; | |
1657 | } | |
1658 | ||
1659 | return flags; | |
1660 | } | |
1661 | ||
e3017af9 LP |
1662 | int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
1663 | struct reply_callback *c; | |
1664 | ||
1665 | if (!bus) | |
1666 | return -EINVAL; | |
1667 | if (!timeout_usec) | |
1668 | return -EINVAL; | |
f54514f3 | 1669 | if (!BUS_IS_OPEN(bus->state)) |
e3017af9 | 1670 | return -ENOTCONN; |
d5a2b9a6 LP |
1671 | if (bus_pid_changed(bus)) |
1672 | return -ECHILD; | |
e3017af9 LP |
1673 | |
1674 | if (bus->state == BUS_AUTHENTICATING) { | |
1675 | *timeout_usec = bus->auth_timeout; | |
1676 | return 1; | |
1677 | } | |
1678 | ||
adee69fa LP |
1679 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
1680 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1681 | return 0; |
adee69fa | 1682 | } |
e3017af9 LP |
1683 | |
1684 | c = prioq_peek(bus->reply_callbacks_prioq); | |
adee69fa LP |
1685 | if (!c) { |
1686 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1687 | return 0; |
adee69fa | 1688 | } |
e3017af9 LP |
1689 | |
1690 | *timeout_usec = c->timeout; | |
1691 | return 1; | |
1692 | } | |
1693 | ||
1694 | static int process_timeout(sd_bus *bus) { | |
eb01ba5d | 1695 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 LP |
1696 | struct reply_callback *c; |
1697 | usec_t n; | |
1698 | int r; | |
1699 | ||
1700 | assert(bus); | |
1701 | ||
1702 | c = prioq_peek(bus->reply_callbacks_prioq); | |
1703 | if (!c) | |
1704 | return 0; | |
1705 | ||
1706 | n = now(CLOCK_MONOTONIC); | |
1707 | if (c->timeout > n) | |
1708 | return 0; | |
1709 | ||
eb01ba5d LP |
1710 | r = bus_message_new_synthetic_error( |
1711 | bus, | |
1712 | c->serial, | |
1713 | &SD_BUS_ERROR_MAKE("org.freedesktop.DBus.Error.Timeout", "Timed out"), | |
1714 | &m); | |
1715 | if (r < 0) | |
1716 | return r; | |
1717 | ||
e3017af9 LP |
1718 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
1719 | hashmap_remove(bus->reply_callbacks, &c->serial); | |
1720 | ||
eb01ba5d | 1721 | r = c->callback(bus, m, c->userdata); |
e3017af9 LP |
1722 | free(c); |
1723 | ||
1724 | return r < 0 ? r : 1; | |
1725 | } | |
1726 | ||
9d373862 LP |
1727 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
1728 | assert(bus); | |
1729 | assert(m); | |
1730 | ||
1731 | if (bus->state != BUS_HELLO) | |
1732 | return 0; | |
1733 | ||
1734 | /* Let's make sure the first message on the bus is the HELLO | |
1735 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
1736 | * here (we leave that to the usual handling), we just verify |
1737 | * we don't let any earlier msg through. */ | |
9d373862 LP |
1738 | |
1739 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_RETURN && | |
1740 | m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_ERROR) | |
1741 | return -EIO; | |
1742 | ||
1743 | if (m->reply_serial != bus->hello_serial) | |
1744 | return -EIO; | |
1745 | ||
1746 | return 0; | |
1747 | } | |
1748 | ||
a652755d LP |
1749 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
1750 | struct reply_callback *c; | |
1751 | int r; | |
1752 | ||
1753 | assert(bus); | |
1754 | assert(m); | |
1755 | ||
1756 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_RETURN && | |
1757 | m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_ERROR) | |
1758 | return 0; | |
1759 | ||
1760 | c = hashmap_remove(bus->reply_callbacks, &m->reply_serial); | |
1761 | if (!c) | |
1762 | return 0; | |
1763 | ||
1764 | if (c->timeout != 0) | |
1765 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1766 | ||
88fe224c LP |
1767 | r = sd_bus_message_rewind(m, true); |
1768 | if (r < 0) | |
1769 | return r; | |
1770 | ||
eb01ba5d | 1771 | r = c->callback(bus, m, c->userdata); |
a652755d LP |
1772 | free(c); |
1773 | ||
1774 | return r; | |
1775 | } | |
1776 | ||
1777 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
1778 | struct filter_callback *l; | |
1779 | int r; | |
1780 | ||
392d5b37 LP |
1781 | assert(bus); |
1782 | assert(m); | |
1783 | ||
7286037f LP |
1784 | do { |
1785 | bus->filter_callbacks_modified = false; | |
1786 | ||
1787 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1788 | ||
1789 | if (bus->filter_callbacks_modified) | |
1790 | break; | |
1791 | ||
1792 | /* Don't run this more than once per iteration */ | |
1793 | if (l->last_iteration == bus->iteration_counter) | |
1794 | continue; | |
1795 | ||
1796 | l->last_iteration = bus->iteration_counter; | |
1797 | ||
88fe224c LP |
1798 | r = sd_bus_message_rewind(m, true); |
1799 | if (r < 0) | |
1800 | return r; | |
1801 | ||
eb01ba5d | 1802 | r = l->callback(bus, m, l->userdata); |
7286037f LP |
1803 | if (r != 0) |
1804 | return r; | |
1805 | ||
1806 | } | |
1807 | ||
1808 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
1809 | |
1810 | return 0; | |
1811 | } | |
1812 | ||
392d5b37 | 1813 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
1814 | int r; |
1815 | ||
392d5b37 LP |
1816 | assert(bus); |
1817 | assert(m); | |
1818 | ||
7286037f LP |
1819 | do { |
1820 | bus->match_callbacks_modified = false; | |
1821 | ||
eb01ba5d | 1822 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
1823 | if (r != 0) |
1824 | return r; | |
1825 | ||
1826 | } while (bus->match_callbacks_modified); | |
1827 | ||
1828 | return 0; | |
392d5b37 LP |
1829 | } |
1830 | ||
b9bf7e2b LP |
1831 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
1832 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
1833 | int r; | |
1834 | ||
1835 | assert(bus); | |
1836 | assert(m); | |
1837 | ||
1838 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) | |
1839 | return 0; | |
1840 | ||
1841 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
1842 | return 0; | |
1843 | ||
1844 | if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) | |
1845 | return 1; | |
1846 | ||
1847 | if (streq_ptr(m->member, "Ping")) | |
1848 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1849 | else if (streq_ptr(m->member, "GetMachineId")) { | |
1850 | sd_id128_t id; | |
1851 | char sid[33]; | |
1852 | ||
1853 | r = sd_id128_get_machine(&id); | |
1854 | if (r < 0) | |
1855 | return r; | |
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", sd_id128_to_string(id, sid)); | |
1862 | } else { | |
29ddb38f LP |
1863 | r = sd_bus_message_new_method_errorf( |
1864 | bus, m, &reply, | |
1865 | "org.freedesktop.DBus.Error.UnknownMethod", | |
b9bf7e2b | 1866 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
1867 | } |
1868 | ||
1869 | if (r < 0) | |
1870 | return r; | |
1871 | ||
1872 | r = sd_bus_send(bus, reply, NULL); | |
1873 | if (r < 0) | |
1874 | return r; | |
1875 | ||
1876 | return 1; | |
1877 | } | |
1878 | ||
992c052c | 1879 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
1880 | int r; |
1881 | ||
1882 | assert(bus); | |
992c052c | 1883 | assert(m); |
e3017af9 | 1884 | |
992c052c | 1885 | bus->iteration_counter++; |
e3017af9 | 1886 | |
992c052c LP |
1887 | r = process_hello(bus, m); |
1888 | if (r != 0) | |
1889 | return r; | |
a652755d | 1890 | |
992c052c LP |
1891 | r = process_reply(bus, m); |
1892 | if (r != 0) | |
1893 | return r; | |
e3017af9 | 1894 | |
992c052c LP |
1895 | r = process_filter(bus, m); |
1896 | if (r != 0) | |
1897 | return r; | |
a652755d | 1898 | |
992c052c LP |
1899 | r = process_match(bus, m); |
1900 | if (r != 0) | |
1901 | return r; | |
a652755d | 1902 | |
992c052c LP |
1903 | r = process_builtin(bus, m); |
1904 | if (r != 0) | |
29ddb38f | 1905 | return r; |
a652755d | 1906 | |
992c052c | 1907 | return bus_process_object(bus, m); |
29ddb38f | 1908 | } |
88fe224c | 1909 | |
992c052c LP |
1910 | static int process_running(sd_bus *bus, sd_bus_message **ret) { |
1911 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
29ddb38f | 1912 | int r; |
a652755d | 1913 | |
29ddb38f | 1914 | assert(bus); |
992c052c | 1915 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 1916 | |
992c052c LP |
1917 | r = process_timeout(bus); |
1918 | if (r != 0) | |
1919 | goto null_message; | |
7286037f | 1920 | |
992c052c LP |
1921 | r = dispatch_wqueue(bus); |
1922 | if (r != 0) | |
1923 | goto null_message; | |
7286037f | 1924 | |
992c052c LP |
1925 | r = dispatch_rqueue(bus, &m); |
1926 | if (r < 0) | |
1927 | return r; | |
1928 | if (!m) | |
1929 | goto null_message; | |
7286037f | 1930 | |
992c052c LP |
1931 | r = process_message(bus, m); |
1932 | if (r != 0) | |
1933 | goto null_message; | |
7286037f | 1934 | |
992c052c LP |
1935 | if (ret) { |
1936 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
1937 | if (r < 0) |
1938 | return r; | |
e3017af9 | 1939 | |
992c052c LP |
1940 | *ret = m; |
1941 | m = NULL; | |
1942 | return 1; | |
1943 | } | |
a652755d | 1944 | |
992c052c | 1945 | if (m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_CALL) { |
a652755d | 1946 | |
992c052c LP |
1947 | r = sd_bus_reply_method_errorf( |
1948 | bus, m, | |
1949 | "org.freedesktop.DBus.Error.UnknownObject", | |
1950 | "Unknown object '%s'.", m->path); | |
29ddb38f LP |
1951 | if (r < 0) |
1952 | return r; | |
1953 | } | |
e3017af9 | 1954 | |
992c052c | 1955 | return 1; |
0a72c2bd | 1956 | |
992c052c LP |
1957 | null_message: |
1958 | if (r >= 0 && ret) | |
1959 | *ret = NULL; | |
0a72c2bd | 1960 | |
992c052c | 1961 | return r; |
29ddb38f | 1962 | } |
0a72c2bd | 1963 | |
992c052c | 1964 | int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
29ddb38f | 1965 | int r; |
0a72c2bd | 1966 | |
992c052c LP |
1967 | /* Returns 0 when we didn't do anything. This should cause the |
1968 | * caller to invoke sd_bus_wait() before returning the next | |
1969 | * time. Returns > 0 when we did something, which possibly | |
1970 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 1971 | |
992c052c LP |
1972 | if (!bus) |
1973 | return -EINVAL; | |
1974 | if (bus_pid_changed(bus)) | |
1975 | return -ECHILD; | |
0a72c2bd | 1976 | |
992c052c LP |
1977 | /* We don't allow recursively invoking sd_bus_process(). */ |
1978 | if (bus->processing) | |
1979 | return -EBUSY; | |
0a72c2bd | 1980 | |
992c052c | 1981 | switch (bus->state) { |
0a72c2bd | 1982 | |
992c052c LP |
1983 | case BUS_UNSET: |
1984 | case BUS_CLOSED: | |
1985 | return -ENOTCONN; | |
0a72c2bd | 1986 | |
992c052c LP |
1987 | case BUS_OPENING: |
1988 | r = bus_socket_process_opening(bus); | |
1989 | if (r < 0) | |
29ddb38f | 1990 | return r; |
992c052c LP |
1991 | if (ret) |
1992 | *ret = NULL; | |
a652755d LP |
1993 | return r; |
1994 | ||
992c052c | 1995 | case BUS_AUTHENTICATING: |
392d5b37 | 1996 | |
992c052c | 1997 | r = bus_socket_process_authenticating(bus); |
29ddb38f LP |
1998 | if (r < 0) |
1999 | return r; | |
992c052c LP |
2000 | if (ret) |
2001 | *ret = NULL; | |
2002 | return r; | |
a652755d | 2003 | |
992c052c LP |
2004 | case BUS_RUNNING: |
2005 | case BUS_HELLO: | |
0a72c2bd | 2006 | |
992c052c LP |
2007 | bus->processing = true; |
2008 | r = process_running(bus, ret); | |
2009 | bus->processing = false; | |
43a43f50 | 2010 | |
43a43f50 | 2011 | return r; |
992c052c | 2012 | } |
43a43f50 | 2013 | |
992c052c | 2014 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2015 | } |
2016 | ||
992c052c LP |
2017 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2018 | struct pollfd p[2] = {}; | |
2019 | int r, e, n; | |
2020 | struct timespec ts; | |
2021 | usec_t until, m; | |
adcdb374 LP |
2022 | |
2023 | assert(bus); | |
adcdb374 | 2024 | |
992c052c LP |
2025 | if (!BUS_IS_OPEN(bus->state)) |
2026 | return -ENOTCONN; | |
adcdb374 | 2027 | |
992c052c LP |
2028 | e = sd_bus_get_events(bus); |
2029 | if (e < 0) | |
2030 | return e; | |
adcdb374 | 2031 | |
992c052c LP |
2032 | if (need_more) |
2033 | e |= POLLIN; | |
9db76355 | 2034 | |
992c052c LP |
2035 | r = sd_bus_get_timeout(bus, &until); |
2036 | if (r < 0) | |
2037 | return r; | |
2038 | if (r == 0) | |
2039 | m = (uint64_t) -1; | |
2040 | else { | |
2041 | usec_t nw; | |
2042 | nw = now(CLOCK_MONOTONIC); | |
2043 | m = until > nw ? until - nw : 0; | |
2044 | } | |
adcdb374 | 2045 | |
992c052c LP |
2046 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2047 | m = timeout_usec; | |
adcdb374 | 2048 | |
992c052c LP |
2049 | p[0].fd = bus->input_fd; |
2050 | if (bus->output_fd == bus->input_fd) { | |
2051 | p[0].events = e; | |
2052 | n = 1; | |
2053 | } else { | |
2054 | p[0].events = e & POLLIN; | |
2055 | p[1].fd = bus->output_fd; | |
2056 | p[1].events = e & POLLOUT; | |
2057 | n = 2; | |
adcdb374 LP |
2058 | } |
2059 | ||
992c052c | 2060 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2061 | if (r < 0) |
992c052c | 2062 | return -errno; |
adcdb374 | 2063 | |
992c052c | 2064 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2065 | } |
2066 | ||
992c052c | 2067 | int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2068 | |
992c052c LP |
2069 | if (!bus) |
2070 | return -EINVAL; | |
2071 | if (!BUS_IS_OPEN(bus->state)) | |
2072 | return -ENOTCONN; | |
2073 | if (bus_pid_changed(bus)) | |
2074 | return -ECHILD; | |
9db76355 | 2075 | |
992c052c LP |
2076 | if (bus->rqueue_size > 0) |
2077 | return 0; | |
9db76355 | 2078 | |
992c052c LP |
2079 | return bus_poll(bus, false, timeout_usec); |
2080 | } | |
9db76355 | 2081 | |
992c052c LP |
2082 | int sd_bus_flush(sd_bus *bus) { |
2083 | int r; | |
9db76355 | 2084 | |
992c052c LP |
2085 | if (!bus) |
2086 | return -EINVAL; | |
2087 | if (!BUS_IS_OPEN(bus->state)) | |
2088 | return -ENOTCONN; | |
2089 | if (bus_pid_changed(bus)) | |
2090 | return -ECHILD; | |
9db76355 | 2091 | |
992c052c LP |
2092 | r = bus_ensure_running(bus); |
2093 | if (r < 0) | |
2094 | return r; | |
9db76355 | 2095 | |
992c052c LP |
2096 | if (bus->wqueue_size <= 0) |
2097 | return 0; | |
9db76355 | 2098 | |
992c052c LP |
2099 | for (;;) { |
2100 | r = dispatch_wqueue(bus); | |
9db76355 LP |
2101 | if (r < 0) |
2102 | return r; | |
2103 | ||
992c052c LP |
2104 | if (bus->wqueue_size <= 0) |
2105 | return 0; | |
9db76355 | 2106 | |
992c052c | 2107 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2108 | if (r < 0) |
2109 | return r; | |
9db76355 | 2110 | } |
9db76355 LP |
2111 | } |
2112 | ||
992c052c LP |
2113 | int sd_bus_add_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) { |
2114 | struct filter_callback *f; | |
de1c301e LP |
2115 | |
2116 | if (!bus) | |
2117 | return -EINVAL; | |
2118 | if (!callback) | |
2119 | return -EINVAL; | |
d5a2b9a6 LP |
2120 | if (bus_pid_changed(bus)) |
2121 | return -ECHILD; | |
de1c301e | 2122 | |
992c052c LP |
2123 | f = new0(struct filter_callback, 1); |
2124 | if (!f) | |
29ddb38f | 2125 | return -ENOMEM; |
992c052c LP |
2126 | f->callback = callback; |
2127 | f->userdata = userdata; | |
29ddb38f | 2128 | |
992c052c | 2129 | bus->filter_callbacks_modified = true; |
71fda00f | 2130 | LIST_PREPEND(callbacks, bus->filter_callbacks, f); |
de1c301e LP |
2131 | return 0; |
2132 | } | |
a652755d | 2133 | |
992c052c LP |
2134 | int sd_bus_remove_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) { |
2135 | struct filter_callback *f; | |
a652755d LP |
2136 | |
2137 | if (!bus) | |
2138 | return -EINVAL; | |
a652755d LP |
2139 | if (!callback) |
2140 | return -EINVAL; | |
d5a2b9a6 LP |
2141 | if (bus_pid_changed(bus)) |
2142 | return -ECHILD; | |
a652755d | 2143 | |
992c052c LP |
2144 | LIST_FOREACH(callbacks, f, bus->filter_callbacks) { |
2145 | if (f->callback == callback && f->userdata == userdata) { | |
2146 | bus->filter_callbacks_modified = true; | |
71fda00f | 2147 | LIST_REMOVE(callbacks, bus->filter_callbacks, f); |
992c052c LP |
2148 | free(f); |
2149 | return 1; | |
29ddb38f LP |
2150 | } |
2151 | } | |
2152 | ||
992c052c | 2153 | return 0; |
a652755d | 2154 | } |
392d5b37 | 2155 | |
992c052c LP |
2156 | int sd_bus_add_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) { |
2157 | struct bus_match_component *components = NULL; | |
2158 | unsigned n_components = 0; | |
2159 | uint64_t cookie = 0; | |
2160 | int r = 0; | |
392d5b37 LP |
2161 | |
2162 | if (!bus) | |
2163 | return -EINVAL; | |
992c052c | 2164 | if (!match) |
392d5b37 | 2165 | return -EINVAL; |
992c052c LP |
2166 | if (bus_pid_changed(bus)) |
2167 | return -ECHILD; | |
392d5b37 | 2168 | |
992c052c LP |
2169 | r = bus_match_parse(match, &components, &n_components); |
2170 | if (r < 0) | |
2171 | goto finish; | |
29ddb38f | 2172 | |
992c052c LP |
2173 | if (bus->bus_client) { |
2174 | cookie = ++bus->match_cookie; | |
29ddb38f | 2175 | |
992c052c LP |
2176 | r = bus_add_match_internal(bus, match, components, n_components, cookie); |
2177 | if (r < 0) | |
2178 | goto finish; | |
392d5b37 LP |
2179 | } |
2180 | ||
992c052c LP |
2181 | bus->match_callbacks_modified = true; |
2182 | r = bus_match_add(&bus->match_callbacks, components, n_components, callback, userdata, cookie, NULL); | |
29ddb38f | 2183 | if (r < 0) { |
992c052c LP |
2184 | if (bus->bus_client) |
2185 | bus_remove_match_internal(bus, match, cookie); | |
29ddb38f | 2186 | } |
917b5dc7 | 2187 | |
992c052c LP |
2188 | finish: |
2189 | bus_match_parse_free(components, n_components); | |
2190 | return r; | |
917b5dc7 LP |
2191 | } |
2192 | ||
992c052c LP |
2193 | int sd_bus_remove_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) { |
2194 | struct bus_match_component *components = NULL; | |
2195 | unsigned n_components = 0; | |
2196 | int r = 0, q = 0; | |
2197 | uint64_t cookie = 0; | |
917b5dc7 | 2198 | |
992c052c | 2199 | if (!bus) |
29ddb38f | 2200 | return -EINVAL; |
992c052c | 2201 | if (!match) |
917b5dc7 | 2202 | return -EINVAL; |
992c052c LP |
2203 | if (bus_pid_changed(bus)) |
2204 | return -ECHILD; | |
917b5dc7 | 2205 | |
992c052c | 2206 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f LP |
2207 | if (r < 0) |
2208 | return r; | |
f10dda3b | 2209 | |
992c052c LP |
2210 | bus->match_callbacks_modified = true; |
2211 | r = bus_match_remove(&bus->match_callbacks, components, n_components, callback, userdata, &cookie); | |
f10dda3b | 2212 | |
992c052c LP |
2213 | if (bus->bus_client) |
2214 | q = bus_remove_match_internal(bus, match, cookie); | |
f10dda3b | 2215 | |
992c052c | 2216 | bus_match_parse_free(components, n_components); |
f10dda3b | 2217 | |
992c052c | 2218 | return r < 0 ? r : q; |
f10dda3b LP |
2219 | } |
2220 | ||
992c052c LP |
2221 | bool bus_pid_changed(sd_bus *bus) { |
2222 | assert(bus); | |
f10dda3b | 2223 | |
992c052c LP |
2224 | /* We don't support people creating a bus connection and |
2225 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 2226 | |
992c052c | 2227 | return bus->original_pid != getpid(); |
d5a2b9a6 | 2228 | } |