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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 | ||
d6888822 | 160 | assert_return(ret, -EINVAL); |
021a1e78 | 161 | |
de1c301e LP |
162 | r = new0(sd_bus, 1); |
163 | if (!r) | |
021a1e78 | 164 | return -ENOMEM; |
de1c301e | 165 | |
e4ee6e5c | 166 | r->n_ref = REFCNT_INIT; |
e82c9509 | 167 | r->input_fd = r->output_fd = -1; |
de1c301e | 168 | r->message_version = 1; |
264ad849 | 169 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d5a2b9a6 | 170 | r->original_pid = getpid(); |
de1c301e | 171 | |
45fbe937 LP |
172 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
173 | ||
de1c301e LP |
174 | /* We guarantee that wqueue always has space for at least one |
175 | * entry */ | |
176 | r->wqueue = new(sd_bus_message*, 1); | |
177 | if (!r->wqueue) { | |
178 | free(r); | |
021a1e78 | 179 | return -ENOMEM; |
de1c301e LP |
180 | } |
181 | ||
021a1e78 LP |
182 | *ret = r; |
183 | return 0; | |
184 | } | |
185 | ||
186 | int sd_bus_set_address(sd_bus *bus, const char *address) { | |
187 | char *a; | |
188 | ||
d6888822 LP |
189 | assert_return(bus, -EINVAL); |
190 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
191 | assert_return(address, -EINVAL); | |
192 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
193 | |
194 | a = strdup(address); | |
195 | if (!a) | |
196 | return -ENOMEM; | |
197 | ||
198 | free(bus->address); | |
199 | bus->address = a; | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
e82c9509 | 204 | int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
205 | assert_return(bus, -EINVAL); |
206 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
207 | assert_return(input_fd >= 0, -EINVAL); | |
208 | assert_return(output_fd >= 0, -EINVAL); | |
209 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 210 | |
e82c9509 LP |
211 | bus->input_fd = input_fd; |
212 | bus->output_fd = output_fd; | |
021a1e78 LP |
213 | return 0; |
214 | } | |
215 | ||
2fd9ae2e LP |
216 | int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
217 | char *p, **a; | |
218 | ||
d6888822 LP |
219 | assert_return(bus, -EINVAL); |
220 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
221 | assert_return(path, -EINVAL); | |
222 | assert_return(!strv_isempty(argv), -EINVAL); | |
223 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
224 | |
225 | p = strdup(path); | |
226 | if (!p) | |
227 | return -ENOMEM; | |
228 | ||
229 | a = strv_copy(argv); | |
230 | if (!a) { | |
231 | free(p); | |
232 | return -ENOMEM; | |
233 | } | |
234 | ||
235 | free(bus->exec_path); | |
236 | strv_free(bus->exec_argv); | |
237 | ||
238 | bus->exec_path = p; | |
239 | bus->exec_argv = a; | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
94bbf1ba | 244 | int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
245 | assert_return(bus, -EINVAL); |
246 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
247 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 248 | |
94bbf1ba | 249 | bus->bus_client = !!b; |
021a1e78 LP |
250 | return 0; |
251 | } | |
252 | ||
264ad849 | 253 | int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
254 | assert_return(bus, -EINVAL); |
255 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
256 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 257 | |
264ad849 LP |
258 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
259 | return 0; | |
260 | } | |
261 | ||
262 | int sd_bus_negotiate_attach_comm(sd_bus *bus, int b) { | |
d6888822 LP |
263 | assert_return(bus, -EINVAL); |
264 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
265 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
266 | |
267 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_COMM, b); | |
268 | return 0; | |
269 | } | |
270 | ||
271 | int sd_bus_negotiate_attach_exe(sd_bus *bus, int b) { | |
d6888822 LP |
272 | assert_return(bus, -EINVAL); |
273 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
274 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
275 | |
276 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_EXE, b); | |
277 | return 0; | |
278 | } | |
279 | ||
280 | int sd_bus_negotiate_attach_cmdline(sd_bus *bus, int b) { | |
d6888822 LP |
281 | assert_return(bus, -EINVAL); |
282 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
283 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
284 | |
285 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CMDLINE, b); | |
286 | return 0; | |
287 | } | |
288 | ||
289 | int sd_bus_negotiate_attach_cgroup(sd_bus *bus, int b) { | |
d6888822 LP |
290 | assert_return(bus, -EINVAL); |
291 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
292 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
293 | |
294 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CGROUP, b); | |
295 | return 0; | |
296 | } | |
297 | ||
298 | int sd_bus_negotiate_attach_caps(sd_bus *bus, int b) { | |
d6888822 LP |
299 | assert_return(bus, -EINVAL); |
300 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
301 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
302 | |
303 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CAPS, b); | |
304 | return 0; | |
305 | } | |
306 | ||
307 | int sd_bus_negotiate_attach_selinux_context(sd_bus *bus, int b) { | |
d6888822 LP |
308 | assert_return(bus, -EINVAL); |
309 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
310 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
311 | |
312 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_SECLABEL, b); | |
313 | return 0; | |
314 | } | |
315 | ||
316 | int sd_bus_negotiate_attach_audit(sd_bus *bus, int b) { | |
d6888822 LP |
317 | assert_return(bus, -EINVAL); |
318 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
319 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
320 | |
321 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_AUDIT, b); | |
021a1e78 LP |
322 | return 0; |
323 | } | |
de1c301e | 324 | |
98178d39 | 325 | int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
326 | assert_return(bus, -EINVAL); |
327 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
328 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
329 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
330 | |
331 | bus->is_server = !!b; | |
98178d39 | 332 | bus->server_id = server_id; |
2181a7f5 LP |
333 | return 0; |
334 | } | |
335 | ||
336 | int sd_bus_set_anonymous(sd_bus *bus, int b) { | |
d6888822 LP |
337 | assert_return(bus, -EINVAL); |
338 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
339 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
340 | |
341 | bus->anonymous_auth = !!b; | |
342 | return 0; | |
343 | } | |
344 | ||
eb01ba5d | 345 | static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata) { |
de1c301e LP |
346 | const char *s; |
347 | int r; | |
348 | ||
349 | assert(bus); | |
021a1e78 | 350 | assert(bus->state == BUS_HELLO); |
de1c301e LP |
351 | assert(reply); |
352 | ||
eb01ba5d LP |
353 | r = bus_message_to_errno(reply); |
354 | if (r < 0) | |
355 | return r; | |
356 | ||
de1c301e LP |
357 | r = sd_bus_message_read(reply, "s", &s); |
358 | if (r < 0) | |
359 | return r; | |
360 | ||
dafb7591 LP |
361 | if (!service_name_is_valid(s) || s[0] != ':') |
362 | return -EBADMSG; | |
363 | ||
de1c301e LP |
364 | bus->unique_name = strdup(s); |
365 | if (!bus->unique_name) | |
366 | return -ENOMEM; | |
367 | ||
dafb7591 LP |
368 | bus->state = BUS_RUNNING; |
369 | ||
de1c301e LP |
370 | return 1; |
371 | } | |
372 | ||
373 | static int bus_send_hello(sd_bus *bus) { | |
374 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
375 | int r; | |
376 | ||
377 | assert(bus); | |
378 | ||
6629161f | 379 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
380 | return 0; |
381 | ||
de1c301e LP |
382 | r = sd_bus_message_new_method_call( |
383 | bus, | |
384 | "org.freedesktop.DBus", | |
385 | "/", | |
386 | "org.freedesktop.DBus", | |
387 | "Hello", | |
388 | &m); | |
389 | if (r < 0) | |
390 | return r; | |
391 | ||
9d373862 | 392 | return sd_bus_send_with_reply(bus, m, hello_callback, NULL, 0, &bus->hello_serial); |
de1c301e LP |
393 | } |
394 | ||
a7e3212d | 395 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
396 | assert(bus); |
397 | ||
f08838da | 398 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 399 | bus->state = BUS_HELLO; |
e3017af9 | 400 | return 1; |
de1c301e LP |
401 | } |
402 | ||
403 | bus->state = BUS_RUNNING; | |
e3017af9 | 404 | return 1; |
de1c301e LP |
405 | } |
406 | ||
407 | static int parse_address_key(const char **p, const char *key, char **value) { | |
408 | size_t l, n = 0; | |
409 | const char *a; | |
410 | char *r = NULL; | |
411 | ||
412 | assert(p); | |
413 | assert(*p); | |
de1c301e LP |
414 | assert(value); |
415 | ||
2fd9ae2e LP |
416 | if (key) { |
417 | l = strlen(key); | |
418 | if (strncmp(*p, key, l) != 0) | |
419 | return 0; | |
de1c301e | 420 | |
2fd9ae2e LP |
421 | if ((*p)[l] != '=') |
422 | return 0; | |
de1c301e | 423 | |
2fd9ae2e LP |
424 | if (*value) |
425 | return -EINVAL; | |
de1c301e | 426 | |
2fd9ae2e LP |
427 | a = *p + l + 1; |
428 | } else | |
429 | a = *p; | |
430 | ||
431 | while (*a != ';' && *a != ',' && *a != 0) { | |
de1c301e LP |
432 | char c, *t; |
433 | ||
434 | if (*a == '%') { | |
435 | int x, y; | |
436 | ||
437 | x = unhexchar(a[1]); | |
438 | if (x < 0) { | |
439 | free(r); | |
440 | return x; | |
441 | } | |
442 | ||
443 | y = unhexchar(a[2]); | |
444 | if (y < 0) { | |
445 | free(r); | |
446 | return y; | |
447 | } | |
448 | ||
de1c301e | 449 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
450 | a += 3; |
451 | } else { | |
de1c301e | 452 | c = *a; |
89ffcd2a LP |
453 | a++; |
454 | } | |
de1c301e | 455 | |
89ffcd2a | 456 | t = realloc(r, n + 2); |
de1c301e LP |
457 | if (!t) { |
458 | free(r); | |
459 | return -ENOMEM; | |
460 | } | |
461 | ||
462 | r = t; | |
463 | r[n++] = c; | |
464 | } | |
465 | ||
89ffcd2a LP |
466 | if (!r) { |
467 | r = strdup(""); | |
468 | if (!r) | |
469 | return -ENOMEM; | |
470 | } else | |
471 | r[n] = 0; | |
472 | ||
473 | if (*a == ',') | |
474 | a++; | |
475 | ||
de1c301e | 476 | *p = a; |
2fd9ae2e LP |
477 | |
478 | free(*value); | |
de1c301e | 479 | *value = r; |
2fd9ae2e | 480 | |
de1c301e LP |
481 | return 1; |
482 | } | |
483 | ||
484 | static void skip_address_key(const char **p) { | |
485 | assert(p); | |
486 | assert(*p); | |
487 | ||
89ffcd2a LP |
488 | *p += strcspn(*p, ","); |
489 | ||
490 | if (**p == ',') | |
491 | (*p) ++; | |
de1c301e LP |
492 | } |
493 | ||
2fd9ae2e LP |
494 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
495 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
496 | size_t l; | |
de1c301e LP |
497 | int r; |
498 | ||
499 | assert(b); | |
2fd9ae2e LP |
500 | assert(p); |
501 | assert(*p); | |
502 | assert(guid); | |
de1c301e | 503 | |
2fd9ae2e LP |
504 | while (**p != 0 && **p != ';') { |
505 | r = parse_address_key(p, "guid", guid); | |
506 | if (r < 0) | |
507 | return r; | |
508 | else if (r > 0) | |
509 | continue; | |
de1c301e | 510 | |
2fd9ae2e LP |
511 | r = parse_address_key(p, "path", &path); |
512 | if (r < 0) | |
513 | return r; | |
514 | else if (r > 0) | |
515 | continue; | |
de1c301e | 516 | |
2fd9ae2e LP |
517 | r = parse_address_key(p, "abstract", &abstract); |
518 | if (r < 0) | |
519 | return r; | |
520 | else if (r > 0) | |
521 | continue; | |
de1c301e | 522 | |
2fd9ae2e LP |
523 | skip_address_key(p); |
524 | } | |
de1c301e | 525 | |
2fd9ae2e LP |
526 | if (!path && !abstract) |
527 | return -EINVAL; | |
de1c301e | 528 | |
2fd9ae2e LP |
529 | if (path && abstract) |
530 | return -EINVAL; | |
531 | ||
532 | if (path) { | |
533 | l = strlen(path); | |
534 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
535 | return -E2BIG; | |
de1c301e | 536 | |
2fd9ae2e LP |
537 | b->sockaddr.un.sun_family = AF_UNIX; |
538 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
539 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
540 | } else if (abstract) { | |
541 | l = strlen(abstract); | |
542 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
543 | return -E2BIG; | |
544 | ||
545 | b->sockaddr.un.sun_family = AF_UNIX; | |
546 | b->sockaddr.un.sun_path[0] = 0; | |
547 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
548 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
549 | } | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
554 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
555 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 556 | int r; |
b92bea5d ZJS |
557 | struct addrinfo *result, hints = { |
558 | .ai_socktype = SOCK_STREAM, | |
559 | .ai_flags = AI_ADDRCONFIG, | |
560 | }; | |
2fd9ae2e LP |
561 | |
562 | assert(b); | |
563 | assert(p); | |
564 | assert(*p); | |
565 | assert(guid); | |
566 | ||
567 | while (**p != 0 && **p != ';') { | |
568 | r = parse_address_key(p, "guid", guid); | |
569 | if (r < 0) | |
570 | return r; | |
571 | else if (r > 0) | |
572 | continue; | |
573 | ||
574 | r = parse_address_key(p, "host", &host); | |
575 | if (r < 0) | |
576 | return r; | |
577 | else if (r > 0) | |
578 | continue; | |
579 | ||
580 | r = parse_address_key(p, "port", &port); | |
581 | if (r < 0) | |
582 | return r; | |
583 | else if (r > 0) | |
584 | continue; | |
585 | ||
586 | r = parse_address_key(p, "family", &family); | |
587 | if (r < 0) | |
588 | return r; | |
589 | else if (r > 0) | |
590 | continue; | |
591 | ||
592 | skip_address_key(p); | |
593 | } | |
594 | ||
595 | if (!host || !port) | |
596 | return -EINVAL; | |
597 | ||
2fd9ae2e LP |
598 | if (family) { |
599 | if (streq(family, "ipv4")) | |
600 | hints.ai_family = AF_INET; | |
601 | else if (streq(family, "ipv6")) | |
602 | hints.ai_family = AF_INET6; | |
603 | else | |
604 | return -EINVAL; | |
605 | } | |
606 | ||
607 | r = getaddrinfo(host, port, &hints, &result); | |
608 | if (r == EAI_SYSTEM) | |
609 | return -errno; | |
610 | else if (r != 0) | |
611 | return -EADDRNOTAVAIL; | |
612 | ||
613 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
614 | b->sockaddr_size = result->ai_addrlen; | |
615 | ||
616 | freeaddrinfo(result); | |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
621 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
622 | char *path = NULL; | |
623 | unsigned n_argv = 0, j; | |
624 | char **argv = NULL; | |
625 | int r; | |
626 | ||
627 | assert(b); | |
628 | assert(p); | |
629 | assert(*p); | |
630 | assert(guid); | |
631 | ||
632 | while (**p != 0 && **p != ';') { | |
633 | r = parse_address_key(p, "guid", guid); | |
634 | if (r < 0) | |
635 | goto fail; | |
636 | else if (r > 0) | |
637 | continue; | |
638 | ||
639 | r = parse_address_key(p, "path", &path); | |
640 | if (r < 0) | |
641 | goto fail; | |
642 | else if (r > 0) | |
643 | continue; | |
644 | ||
645 | if (startswith(*p, "argv")) { | |
646 | unsigned ul; | |
647 | ||
648 | errno = 0; | |
649 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 650 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
651 | r = -EINVAL; |
652 | goto fail; | |
653 | } | |
654 | ||
655 | (*p) ++; | |
656 | ||
657 | if (ul >= n_argv) { | |
658 | char **x; | |
659 | ||
660 | x = realloc(argv, sizeof(char*) * (ul + 2)); | |
661 | if (!x) { | |
662 | r = -ENOMEM; | |
663 | goto fail; | |
664 | } | |
665 | ||
666 | memset(x + n_argv, 0, sizeof(char*) * (ul - n_argv + 2)); | |
667 | ||
668 | argv = x; | |
669 | n_argv = ul + 1; | |
670 | } | |
671 | ||
672 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 673 | if (r < 0) |
2fd9ae2e | 674 | goto fail; |
de1c301e | 675 | |
2fd9ae2e | 676 | continue; |
de1c301e LP |
677 | } |
678 | ||
2fd9ae2e LP |
679 | skip_address_key(p); |
680 | } | |
de1c301e | 681 | |
5a0f6033 LP |
682 | if (!path) { |
683 | r = -EINVAL; | |
2fd9ae2e | 684 | goto fail; |
5a0f6033 | 685 | } |
de1c301e | 686 | |
2fd9ae2e LP |
687 | /* Make sure there are no holes in the array, with the |
688 | * exception of argv[0] */ | |
689 | for (j = 1; j < n_argv; j++) | |
690 | if (!argv[j]) { | |
691 | r = -EINVAL; | |
692 | goto fail; | |
693 | } | |
694 | ||
695 | if (argv && argv[0] == NULL) { | |
696 | argv[0] = strdup(path); | |
697 | if (!argv[0]) { | |
698 | r = -ENOMEM; | |
699 | goto fail; | |
700 | } | |
701 | } | |
de1c301e | 702 | |
2fd9ae2e LP |
703 | b->exec_path = path; |
704 | b->exec_argv = argv; | |
705 | return 0; | |
de1c301e | 706 | |
2fd9ae2e LP |
707 | fail: |
708 | for (j = 0; j < n_argv; j++) | |
709 | free(argv[j]); | |
710 | ||
711 | free(argv); | |
712 | free(path); | |
713 | return r; | |
714 | } | |
715 | ||
6629161f LP |
716 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
717 | _cleanup_free_ char *path = NULL; | |
718 | int r; | |
719 | ||
720 | assert(b); | |
721 | assert(p); | |
722 | assert(*p); | |
723 | assert(guid); | |
724 | ||
725 | while (**p != 0 && **p != ';') { | |
726 | r = parse_address_key(p, "guid", guid); | |
727 | if (r < 0) | |
728 | return r; | |
729 | else if (r > 0) | |
730 | continue; | |
731 | ||
732 | r = parse_address_key(p, "path", &path); | |
733 | if (r < 0) | |
734 | return r; | |
735 | else if (r > 0) | |
736 | continue; | |
737 | ||
738 | skip_address_key(p); | |
739 | } | |
740 | ||
741 | if (!path) | |
742 | return -EINVAL; | |
743 | ||
744 | free(b->kernel); | |
745 | b->kernel = path; | |
746 | path = NULL; | |
747 | ||
748 | return 0; | |
749 | } | |
750 | ||
2fd9ae2e LP |
751 | static void bus_reset_parsed_address(sd_bus *b) { |
752 | assert(b); | |
753 | ||
754 | zero(b->sockaddr); | |
755 | b->sockaddr_size = 0; | |
756 | strv_free(b->exec_argv); | |
757 | free(b->exec_path); | |
758 | b->exec_path = NULL; | |
759 | b->exec_argv = NULL; | |
98178d39 | 760 | b->server_id = SD_ID128_NULL; |
6629161f LP |
761 | free(b->kernel); |
762 | b->kernel = NULL; | |
2fd9ae2e LP |
763 | } |
764 | ||
765 | static int bus_parse_next_address(sd_bus *b) { | |
766 | _cleanup_free_ char *guid = NULL; | |
767 | const char *a; | |
768 | int r; | |
769 | ||
770 | assert(b); | |
771 | ||
772 | if (!b->address) | |
773 | return 0; | |
774 | if (b->address[b->address_index] == 0) | |
775 | return 0; | |
776 | ||
777 | bus_reset_parsed_address(b); | |
778 | ||
779 | a = b->address + b->address_index; | |
de1c301e | 780 | |
2fd9ae2e | 781 | while (*a != 0) { |
de1c301e | 782 | |
2fd9ae2e LP |
783 | if (*a == ';') { |
784 | a++; | |
785 | continue; | |
de1c301e LP |
786 | } |
787 | ||
2fd9ae2e LP |
788 | if (startswith(a, "unix:")) { |
789 | a += 5; | |
de1c301e | 790 | |
2fd9ae2e | 791 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
792 | if (r < 0) |
793 | return r; | |
2fd9ae2e | 794 | break; |
de1c301e | 795 | |
2fd9ae2e | 796 | } else if (startswith(a, "tcp:")) { |
de1c301e | 797 | |
2fd9ae2e LP |
798 | a += 4; |
799 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
800 | if (r < 0) |
801 | return r; | |
de1c301e | 802 | |
2fd9ae2e LP |
803 | break; |
804 | ||
805 | } else if (startswith(a, "unixexec:")) { | |
806 | ||
807 | a += 9; | |
808 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
809 | if (r < 0) |
810 | return r; | |
de1c301e | 811 | |
2fd9ae2e | 812 | break; |
de1c301e | 813 | |
6629161f LP |
814 | } else if (startswith(a, "kernel:")) { |
815 | ||
816 | a += 7; | |
817 | r = parse_kernel_address(b, &a, &guid); | |
818 | if (r < 0) | |
819 | return r; | |
820 | ||
821 | break; | |
de1c301e LP |
822 | } |
823 | ||
2fd9ae2e LP |
824 | a = strchr(a, ';'); |
825 | if (!a) | |
826 | return 0; | |
de1c301e LP |
827 | } |
828 | ||
829 | if (guid) { | |
98178d39 | 830 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
831 | if (r < 0) |
832 | return r; | |
833 | } | |
834 | ||
2fd9ae2e | 835 | b->address_index = a - b->address; |
de1c301e LP |
836 | return 1; |
837 | } | |
838 | ||
a7e3212d | 839 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
840 | int r; |
841 | ||
842 | assert(b); | |
843 | ||
844 | for (;;) { | |
e82c9509 | 845 | sd_bus_close(b); |
2fd9ae2e LP |
846 | |
847 | if (b->sockaddr.sa.sa_family != AF_UNSPEC) { | |
a7e3212d LP |
848 | |
849 | r = bus_socket_connect(b); | |
2fd9ae2e LP |
850 | if (r >= 0) |
851 | return r; | |
852 | ||
853 | b->last_connect_error = -r; | |
854 | ||
855 | } else if (b->exec_path) { | |
856 | ||
a7e3212d | 857 | r = bus_socket_exec(b); |
2fd9ae2e LP |
858 | if (r >= 0) |
859 | return r; | |
860 | ||
6629161f LP |
861 | b->last_connect_error = -r; |
862 | } else if (b->kernel) { | |
863 | ||
864 | r = bus_kernel_connect(b); | |
865 | if (r >= 0) | |
866 | return r; | |
867 | ||
2fd9ae2e LP |
868 | b->last_connect_error = -r; |
869 | } | |
870 | ||
871 | r = bus_parse_next_address(b); | |
872 | if (r < 0) | |
873 | return r; | |
874 | if (r == 0) | |
875 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
876 | } |
877 | } | |
878 | ||
a7e3212d LP |
879 | int bus_next_address(sd_bus *b) { |
880 | assert(b); | |
881 | ||
882 | bus_reset_parsed_address(b); | |
883 | return bus_start_address(b); | |
884 | } | |
885 | ||
021a1e78 | 886 | static int bus_start_fd(sd_bus *b) { |
6629161f | 887 | struct stat st; |
021a1e78 LP |
888 | int r; |
889 | ||
890 | assert(b); | |
e82c9509 LP |
891 | assert(b->input_fd >= 0); |
892 | assert(b->output_fd >= 0); | |
021a1e78 | 893 | |
e82c9509 | 894 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
895 | if (r < 0) |
896 | return r; | |
897 | ||
e82c9509 | 898 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
899 | if (r < 0) |
900 | return r; | |
901 | ||
e82c9509 LP |
902 | if (b->input_fd != b->output_fd) { |
903 | r = fd_nonblock(b->output_fd, true); | |
904 | if (r < 0) | |
905 | return r; | |
906 | ||
907 | r = fd_cloexec(b->output_fd, true); | |
908 | if (r < 0) | |
909 | return r; | |
910 | } | |
911 | ||
6629161f LP |
912 | if (fstat(b->input_fd, &st) < 0) |
913 | return -errno; | |
914 | ||
915 | if (S_ISCHR(b->input_fd)) | |
916 | return bus_kernel_take_fd(b); | |
917 | else | |
918 | return bus_socket_take_fd(b); | |
021a1e78 LP |
919 | } |
920 | ||
921 | int sd_bus_start(sd_bus *bus) { | |
922 | int r; | |
923 | ||
d6888822 LP |
924 | assert_return(bus, -EINVAL); |
925 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
926 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
927 | |
928 | bus->state = BUS_OPENING; | |
929 | ||
2181a7f5 LP |
930 | if (bus->is_server && bus->bus_client) |
931 | return -EINVAL; | |
932 | ||
e82c9509 | 933 | if (bus->input_fd >= 0) |
021a1e78 | 934 | r = bus_start_fd(bus); |
6629161f | 935 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel) |
a7e3212d | 936 | r = bus_start_address(bus); |
021a1e78 LP |
937 | else |
938 | return -EINVAL; | |
939 | ||
940 | if (r < 0) | |
941 | return r; | |
942 | ||
943 | return bus_send_hello(bus); | |
944 | } | |
945 | ||
de1c301e LP |
946 | int sd_bus_open_system(sd_bus **ret) { |
947 | const char *e; | |
948 | sd_bus *b; | |
949 | int r; | |
950 | ||
d6888822 | 951 | assert_return(ret, -EINVAL); |
de1c301e | 952 | |
021a1e78 LP |
953 | r = sd_bus_new(&b); |
954 | if (r < 0) | |
955 | return r; | |
956 | ||
6c03089c | 957 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); |
de1c301e | 958 | if (e) { |
021a1e78 | 959 | r = sd_bus_set_address(b, e); |
de1c301e | 960 | if (r < 0) |
021a1e78 | 961 | goto fail; |
89ffcd2a | 962 | } else { |
89ffcd2a LP |
963 | b->sockaddr.un.sun_family = AF_UNIX; |
964 | strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); | |
965 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1; | |
89ffcd2a | 966 | } |
de1c301e | 967 | |
94bbf1ba | 968 | b->bus_client = true; |
021a1e78 LP |
969 | |
970 | r = sd_bus_start(b); | |
971 | if (r < 0) | |
972 | goto fail; | |
de1c301e LP |
973 | |
974 | *ret = b; | |
975 | return 0; | |
021a1e78 LP |
976 | |
977 | fail: | |
978 | bus_free(b); | |
979 | return r; | |
de1c301e LP |
980 | } |
981 | ||
982 | int sd_bus_open_user(sd_bus **ret) { | |
983 | const char *e; | |
984 | sd_bus *b; | |
985 | size_t l; | |
986 | int r; | |
987 | ||
d6888822 | 988 | assert_return(ret, -EINVAL); |
de1c301e | 989 | |
021a1e78 LP |
990 | r = sd_bus_new(&b); |
991 | if (r < 0) | |
992 | return r; | |
993 | ||
6c03089c | 994 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
de1c301e | 995 | if (e) { |
021a1e78 | 996 | r = sd_bus_set_address(b, e); |
de1c301e | 997 | if (r < 0) |
021a1e78 | 998 | goto fail; |
89ffcd2a | 999 | } else { |
6c03089c | 1000 | e = secure_getenv("XDG_RUNTIME_DIR"); |
021a1e78 LP |
1001 | if (!e) { |
1002 | r = -ENOENT; | |
1003 | goto fail; | |
1004 | } | |
de1c301e | 1005 | |
89ffcd2a | 1006 | l = strlen(e); |
021a1e78 LP |
1007 | if (l + 4 > sizeof(b->sockaddr.un.sun_path)) { |
1008 | r = -E2BIG; | |
1009 | goto fail; | |
1010 | } | |
de1c301e | 1011 | |
89ffcd2a LP |
1012 | b->sockaddr.un.sun_family = AF_UNIX; |
1013 | memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4); | |
1014 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4; | |
de1c301e LP |
1015 | } |
1016 | ||
94bbf1ba | 1017 | b->bus_client = true; |
de1c301e | 1018 | |
021a1e78 | 1019 | r = sd_bus_start(b); |
2571ead1 LP |
1020 | if (r < 0) |
1021 | goto fail; | |
de1c301e LP |
1022 | |
1023 | *ret = b; | |
1024 | return 0; | |
2571ead1 LP |
1025 | |
1026 | fail: | |
021a1e78 | 1027 | bus_free(b); |
2571ead1 | 1028 | return r; |
de1c301e LP |
1029 | } |
1030 | ||
1031 | void sd_bus_close(sd_bus *bus) { | |
1032 | if (!bus) | |
1033 | return; | |
d5a2b9a6 LP |
1034 | if (bus->state == BUS_CLOSED) |
1035 | return; | |
1036 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1037 | return; |
1038 | ||
1039 | bus->state = BUS_CLOSED; | |
e82c9509 | 1040 | |
f54514f3 LP |
1041 | if (!bus->is_kernel) |
1042 | bus_close_fds(bus); | |
1043 | ||
1044 | /* We'll leave the fd open in case this is a kernel bus, since | |
1045 | * there might still be memblocks around that reference this | |
1046 | * bus, and they might need to invoke the | |
1047 | * KDBUS_CMD_MSG_RELEASE ioctl on the fd when they are | |
1048 | * freed. */ | |
de1c301e LP |
1049 | } |
1050 | ||
1051 | sd_bus *sd_bus_ref(sd_bus *bus) { | |
1052 | if (!bus) | |
1053 | return NULL; | |
1054 | ||
e4ee6e5c | 1055 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1056 | |
de1c301e LP |
1057 | return bus; |
1058 | } | |
1059 | ||
1060 | sd_bus *sd_bus_unref(sd_bus *bus) { | |
1061 | if (!bus) | |
1062 | return NULL; | |
1063 | ||
e4ee6e5c | 1064 | if (REFCNT_DEC(bus->n_ref) <= 0) |
de1c301e LP |
1065 | bus_free(bus); |
1066 | ||
1067 | return NULL; | |
1068 | } | |
1069 | ||
e3017af9 | 1070 | int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1071 | |
1072 | assert_return(bus, -EINVAL); | |
1073 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1074 | |
f54514f3 | 1075 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1076 | } |
1077 | ||
d728d708 LP |
1078 | int sd_bus_can_send(sd_bus *bus, char type) { |
1079 | int r; | |
1080 | ||
d6888822 LP |
1081 | assert_return(bus, -EINVAL); |
1082 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1083 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1084 | |
d728d708 | 1085 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1086 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1087 | return 0; |
1088 | ||
20902f3e | 1089 | r = bus_ensure_running(bus); |
d728d708 LP |
1090 | if (r < 0) |
1091 | return r; | |
de1c301e | 1092 | |
d728d708 LP |
1093 | return bus->can_fds; |
1094 | } | |
1095 | ||
1096 | return bus_type_is_valid(type); | |
de1c301e LP |
1097 | } |
1098 | ||
98178d39 | 1099 | int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) { |
d728d708 | 1100 | int r; |
de1c301e | 1101 | |
d6888822 LP |
1102 | assert_return(bus, -EINVAL); |
1103 | assert_return(server_id, -EINVAL); | |
1104 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1105 | |
20902f3e | 1106 | r = bus_ensure_running(bus); |
d728d708 LP |
1107 | if (r < 0) |
1108 | return r; | |
de1c301e | 1109 | |
98178d39 | 1110 | *server_id = bus->server_id; |
d728d708 | 1111 | return 0; |
de1c301e LP |
1112 | } |
1113 | ||
1114 | static int bus_seal_message(sd_bus *b, sd_bus_message *m) { | |
1115 | assert(m); | |
1116 | ||
89ffcd2a LP |
1117 | if (m->header->version > b->message_version) |
1118 | return -EPERM; | |
1119 | ||
de1c301e LP |
1120 | if (m->sealed) |
1121 | return 0; | |
1122 | ||
9a17484d | 1123 | return bus_message_seal(m, ++b->serial); |
de1c301e LP |
1124 | } |
1125 | ||
de1c301e | 1126 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1127 | int r, ret = 0; |
de1c301e LP |
1128 | |
1129 | assert(bus); | |
89ffcd2a | 1130 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1131 | |
de1c301e LP |
1132 | while (bus->wqueue_size > 0) { |
1133 | ||
6629161f LP |
1134 | if (bus->is_kernel) |
1135 | r = bus_kernel_write_message(bus, bus->wqueue[0]); | |
1136 | else | |
1137 | r = bus_socket_write_message(bus, bus->wqueue[0], &bus->windex); | |
1138 | ||
de1c301e LP |
1139 | if (r < 0) { |
1140 | sd_bus_close(bus); | |
1141 | return r; | |
1142 | } else if (r == 0) | |
e3017af9 LP |
1143 | /* Didn't do anything this time */ |
1144 | return ret; | |
6629161f | 1145 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1146 | /* Fully written. Let's drop the entry from |
1147 | * the queue. | |
1148 | * | |
1149 | * This isn't particularly optimized, but | |
1150 | * well, this is supposed to be our worst-case | |
1151 | * buffer only, and the socket buffer is | |
1152 | * supposed to be our primary buffer, and if | |
1153 | * it got full, then all bets are off | |
1154 | * anyway. */ | |
1155 | ||
1156 | sd_bus_message_unref(bus->wqueue[0]); | |
1157 | bus->wqueue_size --; | |
1158 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); | |
1159 | bus->windex = 0; | |
1160 | ||
e3017af9 | 1161 | ret = 1; |
de1c301e LP |
1162 | } |
1163 | } | |
1164 | ||
e3017af9 | 1165 | return ret; |
de1c301e LP |
1166 | } |
1167 | ||
1168 | static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) { | |
2bf938c1 | 1169 | sd_bus_message *z = NULL; |
e3017af9 | 1170 | int r, ret = 0; |
de1c301e LP |
1171 | |
1172 | assert(bus); | |
1173 | assert(m); | |
89ffcd2a | 1174 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1175 | |
de1c301e LP |
1176 | if (bus->rqueue_size > 0) { |
1177 | /* Dispatch a queued message */ | |
1178 | ||
1179 | *m = bus->rqueue[0]; | |
1180 | bus->rqueue_size --; | |
1181 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1182 | return 1; | |
1183 | } | |
1184 | ||
1185 | /* Try to read a new message */ | |
e3017af9 | 1186 | do { |
6629161f LP |
1187 | if (bus->is_kernel) |
1188 | r = bus_kernel_read_message(bus, &z); | |
1189 | else | |
1190 | r = bus_socket_read_message(bus, &z); | |
1191 | ||
e3017af9 LP |
1192 | if (r < 0) { |
1193 | sd_bus_close(bus); | |
1194 | return r; | |
1195 | } | |
1196 | if (r == 0) | |
1197 | return ret; | |
de1c301e | 1198 | |
2e8d788c | 1199 | ret = 1; |
e3017af9 LP |
1200 | } while (!z); |
1201 | ||
1202 | *m = z; | |
2e8d788c | 1203 | return ret; |
de1c301e LP |
1204 | } |
1205 | ||
1206 | int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) { | |
1207 | int r; | |
1208 | ||
d6888822 LP |
1209 | assert_return(bus, -EINVAL); |
1210 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1211 | assert_return(m, -EINVAL); | |
1212 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1213 | |
1214 | if (m->n_fds > 0) { | |
1215 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1216 | if (r < 0) | |
1217 | return r; | |
1218 | if (r == 0) | |
1219 | return -ENOTSUP; | |
1220 | } | |
de1c301e | 1221 | |
29f6aadd LP |
1222 | /* If the serial number isn't kept, then we know that no reply |
1223 | * is expected */ | |
1224 | if (!serial && !m->sealed) | |
1225 | m->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; | |
1226 | ||
de1c301e LP |
1227 | r = bus_seal_message(bus, m); |
1228 | if (r < 0) | |
1229 | return r; | |
1230 | ||
5407f2de LP |
1231 | /* If this is a reply and no reply was requested, then let's |
1232 | * suppress this, if we can */ | |
1233 | if (m->dont_send && !serial) | |
1234 | return 0; | |
1235 | ||
89ffcd2a | 1236 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1237 | size_t idx = 0; |
1238 | ||
6629161f LP |
1239 | if (bus->is_kernel) |
1240 | r = bus_kernel_write_message(bus, m); | |
1241 | else | |
1242 | r = bus_socket_write_message(bus, m, &idx); | |
1243 | ||
de1c301e LP |
1244 | if (r < 0) { |
1245 | sd_bus_close(bus); | |
1246 | return r; | |
6629161f | 1247 | } else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1248 | /* Wasn't fully written. So let's remember how |
1249 | * much was written. Note that the first entry | |
1250 | * of the wqueue array is always allocated so | |
1251 | * that we always can remember how much was | |
1252 | * written. */ | |
1253 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1254 | bus->wqueue_size = 1; | |
1255 | bus->windex = idx; | |
1256 | } | |
1257 | } else { | |
1258 | sd_bus_message **q; | |
1259 | ||
1260 | /* Just append it to the queue. */ | |
1261 | ||
25220239 | 1262 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1263 | return -ENOBUFS; |
1264 | ||
1265 | q = realloc(bus->wqueue, sizeof(sd_bus_message*) * (bus->wqueue_size + 1)); | |
1266 | if (!q) | |
1267 | return -ENOMEM; | |
1268 | ||
1269 | bus->wqueue = q; | |
1270 | q[bus->wqueue_size ++] = sd_bus_message_ref(m); | |
1271 | } | |
1272 | ||
1273 | if (serial) | |
1274 | *serial = BUS_MESSAGE_SERIAL(m); | |
1275 | ||
1276 | return 0; | |
1277 | } | |
1278 | ||
1279 | static usec_t calc_elapse(uint64_t usec) { | |
1280 | if (usec == (uint64_t) -1) | |
1281 | return 0; | |
1282 | ||
1283 | if (usec == 0) | |
e3017af9 | 1284 | usec = BUS_DEFAULT_TIMEOUT; |
de1c301e LP |
1285 | |
1286 | return now(CLOCK_MONOTONIC) + usec; | |
1287 | } | |
1288 | ||
e3017af9 LP |
1289 | static int timeout_compare(const void *a, const void *b) { |
1290 | const struct reply_callback *x = a, *y = b; | |
1291 | ||
1292 | if (x->timeout != 0 && y->timeout == 0) | |
1293 | return -1; | |
1294 | ||
1295 | if (x->timeout == 0 && y->timeout != 0) | |
1296 | return 1; | |
1297 | ||
1298 | if (x->timeout < y->timeout) | |
1299 | return -1; | |
1300 | ||
1301 | if (x->timeout > y->timeout) | |
1302 | return 1; | |
1303 | ||
1304 | return 0; | |
1305 | } | |
1306 | ||
de1c301e LP |
1307 | int sd_bus_send_with_reply( |
1308 | sd_bus *bus, | |
1309 | sd_bus_message *m, | |
52f3ba91 | 1310 | sd_bus_message_handler_t callback, |
de1c301e LP |
1311 | void *userdata, |
1312 | uint64_t usec, | |
1313 | uint64_t *serial) { | |
1314 | ||
1315 | struct reply_callback *c; | |
1316 | int r; | |
1317 | ||
d6888822 LP |
1318 | assert_return(bus, -EINVAL); |
1319 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1320 | assert_return(m, -EINVAL); | |
1321 | assert_return(m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_CALL, -EINVAL); | |
1322 | assert_return(!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); | |
1323 | assert_return(callback, -EINVAL); | |
1324 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a LP |
1325 | |
1326 | r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func); | |
1327 | if (r < 0) | |
1328 | return r; | |
de1c301e | 1329 | |
e3017af9 LP |
1330 | if (usec != (uint64_t) -1) { |
1331 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); | |
1332 | if (r < 0) | |
1333 | return r; | |
1334 | } | |
1335 | ||
de1c301e LP |
1336 | r = bus_seal_message(bus, m); |
1337 | if (r < 0) | |
1338 | return r; | |
1339 | ||
eba8617e | 1340 | c = new0(struct reply_callback, 1); |
de1c301e LP |
1341 | if (!c) |
1342 | return -ENOMEM; | |
1343 | ||
1344 | c->callback = callback; | |
1345 | c->userdata = userdata; | |
1346 | c->serial = BUS_MESSAGE_SERIAL(m); | |
1347 | c->timeout = calc_elapse(usec); | |
1348 | ||
1349 | r = hashmap_put(bus->reply_callbacks, &c->serial, c); | |
1350 | if (r < 0) { | |
1351 | free(c); | |
1352 | return r; | |
1353 | } | |
1354 | ||
e3017af9 LP |
1355 | if (c->timeout != 0) { |
1356 | r = prioq_put(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1357 | if (r < 0) { | |
1358 | c->timeout = 0; | |
1359 | sd_bus_send_with_reply_cancel(bus, c->serial); | |
1360 | return r; | |
1361 | } | |
1362 | } | |
1363 | ||
de1c301e LP |
1364 | r = sd_bus_send(bus, m, serial); |
1365 | if (r < 0) { | |
e3017af9 | 1366 | sd_bus_send_with_reply_cancel(bus, c->serial); |
de1c301e LP |
1367 | return r; |
1368 | } | |
1369 | ||
1370 | return r; | |
1371 | } | |
1372 | ||
1373 | int sd_bus_send_with_reply_cancel(sd_bus *bus, uint64_t serial) { | |
e3017af9 | 1374 | struct reply_callback *c; |
de1c301e | 1375 | |
d6888822 LP |
1376 | assert_return(bus, -EINVAL); |
1377 | assert_return(serial != 0, -EINVAL); | |
1378 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e LP |
1379 | |
1380 | c = hashmap_remove(bus->reply_callbacks, &serial); | |
1381 | if (!c) | |
1382 | return 0; | |
1383 | ||
e3017af9 LP |
1384 | if (c->timeout != 0) |
1385 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1386 | ||
de1c301e LP |
1387 | free(c); |
1388 | return 1; | |
1389 | } | |
1390 | ||
20902f3e | 1391 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1392 | int r; |
1393 | ||
1394 | assert(bus); | |
1395 | ||
f54514f3 | 1396 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED) |
021a1e78 | 1397 | return -ENOTCONN; |
d728d708 LP |
1398 | if (bus->state == BUS_RUNNING) |
1399 | return 1; | |
89ffcd2a LP |
1400 | |
1401 | for (;;) { | |
1402 | r = sd_bus_process(bus, NULL); | |
1403 | if (r < 0) | |
1404 | return r; | |
d728d708 LP |
1405 | if (bus->state == BUS_RUNNING) |
1406 | return 1; | |
e3017af9 LP |
1407 | if (r > 0) |
1408 | continue; | |
89ffcd2a LP |
1409 | |
1410 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1411 | if (r < 0) | |
1412 | return r; | |
1413 | } | |
1414 | } | |
1415 | ||
de1c301e LP |
1416 | int sd_bus_send_with_reply_and_block( |
1417 | sd_bus *bus, | |
1418 | sd_bus_message *m, | |
1419 | uint64_t usec, | |
1420 | sd_bus_error *error, | |
1421 | sd_bus_message **reply) { | |
1422 | ||
1423 | int r; | |
1424 | usec_t timeout; | |
1425 | uint64_t serial; | |
1426 | bool room = false; | |
1427 | ||
d6888822 LP |
1428 | assert_return(bus, -EINVAL); |
1429 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1430 | assert_return(m, -EINVAL); | |
1431 | assert_return(m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_CALL, -EINVAL); | |
1432 | assert_return(!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); | |
1433 | assert_return(!bus_error_is_dirty(error), -EINVAL); | |
1434 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a | 1435 | |
20902f3e | 1436 | r = bus_ensure_running(bus); |
89ffcd2a LP |
1437 | if (r < 0) |
1438 | return r; | |
de1c301e LP |
1439 | |
1440 | r = sd_bus_send(bus, m, &serial); | |
1441 | if (r < 0) | |
1442 | return r; | |
1443 | ||
1444 | timeout = calc_elapse(usec); | |
1445 | ||
1446 | for (;;) { | |
1447 | usec_t left; | |
e3017af9 | 1448 | sd_bus_message *incoming = NULL; |
de1c301e LP |
1449 | |
1450 | if (!room) { | |
1451 | sd_bus_message **q; | |
1452 | ||
25220239 LP |
1453 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
1454 | return -ENOBUFS; | |
1455 | ||
de1c301e LP |
1456 | /* Make sure there's room for queuing this |
1457 | * locally, before we read the message */ | |
1458 | ||
1459 | q = realloc(bus->rqueue, (bus->rqueue_size + 1) * sizeof(sd_bus_message*)); | |
1460 | if (!q) | |
1461 | return -ENOMEM; | |
1462 | ||
1463 | bus->rqueue = q; | |
1464 | room = true; | |
1465 | } | |
1466 | ||
6629161f LP |
1467 | if (bus->is_kernel) |
1468 | r = bus_kernel_read_message(bus, &incoming); | |
1469 | else | |
1470 | r = bus_socket_read_message(bus, &incoming); | |
de1c301e LP |
1471 | if (r < 0) |
1472 | return r; | |
e3017af9 | 1473 | if (incoming) { |
89ffcd2a | 1474 | |
de1c301e LP |
1475 | if (incoming->reply_serial == serial) { |
1476 | /* Found a match! */ | |
1477 | ||
1478 | if (incoming->header->type == SD_BUS_MESSAGE_TYPE_METHOD_RETURN) { | |
b7f247e0 LP |
1479 | |
1480 | if (reply) | |
1481 | *reply = incoming; | |
1482 | else | |
1483 | sd_bus_message_unref(incoming); | |
1484 | ||
de1c301e LP |
1485 | return 0; |
1486 | } | |
1487 | ||
1488 | if (incoming->header->type == SD_BUS_MESSAGE_TYPE_METHOD_ERROR) { | |
1489 | int k; | |
1490 | ||
1491 | r = sd_bus_error_copy(error, &incoming->error); | |
1492 | if (r < 0) { | |
1493 | sd_bus_message_unref(incoming); | |
1494 | return r; | |
1495 | } | |
1496 | ||
1497 | k = bus_error_to_errno(&incoming->error); | |
1498 | sd_bus_message_unref(incoming); | |
1499 | return k; | |
1500 | } | |
1501 | ||
1502 | sd_bus_message_unref(incoming); | |
1503 | return -EIO; | |
1504 | } | |
1505 | ||
1506 | /* There's already guaranteed to be room for | |
1507 | * this, so need to resize things here */ | |
1508 | bus->rqueue[bus->rqueue_size ++] = incoming; | |
1509 | room = false; | |
1510 | ||
1511 | /* Try to read more, right-away */ | |
1512 | continue; | |
1513 | } | |
e3017af9 LP |
1514 | if (r != 0) |
1515 | continue; | |
de1c301e LP |
1516 | |
1517 | if (timeout > 0) { | |
1518 | usec_t n; | |
1519 | ||
1520 | n = now(CLOCK_MONOTONIC); | |
1521 | if (n >= timeout) | |
1522 | return -ETIMEDOUT; | |
1523 | ||
1524 | left = timeout - n; | |
1525 | } else | |
1526 | left = (uint64_t) -1; | |
1527 | ||
e3017af9 | 1528 | r = bus_poll(bus, true, left); |
de1c301e LP |
1529 | if (r < 0) |
1530 | return r; | |
1531 | ||
1532 | r = dispatch_wqueue(bus); | |
1533 | if (r < 0) | |
1534 | return r; | |
1535 | } | |
1536 | } | |
1537 | ||
1538 | int sd_bus_get_fd(sd_bus *bus) { | |
d6888822 LP |
1539 | |
1540 | assert_return(bus, -EINVAL); | |
1541 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1542 | assert_return(bus->input_fd == bus->output_fd, -EPERM); | |
1543 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1544 | |
e82c9509 | 1545 | return bus->input_fd; |
de1c301e LP |
1546 | } |
1547 | ||
1548 | int sd_bus_get_events(sd_bus *bus) { | |
1549 | int flags = 0; | |
1550 | ||
d6888822 LP |
1551 | assert_return(bus, -EINVAL); |
1552 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1553 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e LP |
1554 | |
1555 | if (bus->state == BUS_OPENING) | |
1556 | flags |= POLLOUT; | |
89ffcd2a LP |
1557 | else if (bus->state == BUS_AUTHENTICATING) { |
1558 | ||
2181a7f5 | 1559 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
1560 | flags |= POLLOUT; |
1561 | ||
1562 | flags |= POLLIN; | |
1563 | ||
1564 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
1565 | if (bus->rqueue_size <= 0) |
1566 | flags |= POLLIN; | |
1567 | if (bus->wqueue_size > 0) | |
1568 | flags |= POLLOUT; | |
1569 | } | |
1570 | ||
1571 | return flags; | |
1572 | } | |
1573 | ||
e3017af9 LP |
1574 | int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
1575 | struct reply_callback *c; | |
1576 | ||
d6888822 LP |
1577 | assert_return(bus, -EINVAL); |
1578 | assert_return(timeout_usec, -EINVAL); | |
1579 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1580 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 LP |
1581 | |
1582 | if (bus->state == BUS_AUTHENTICATING) { | |
1583 | *timeout_usec = bus->auth_timeout; | |
1584 | return 1; | |
1585 | } | |
1586 | ||
adee69fa LP |
1587 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
1588 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1589 | return 0; |
adee69fa | 1590 | } |
e3017af9 LP |
1591 | |
1592 | c = prioq_peek(bus->reply_callbacks_prioq); | |
adee69fa LP |
1593 | if (!c) { |
1594 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1595 | return 0; |
adee69fa | 1596 | } |
e3017af9 LP |
1597 | |
1598 | *timeout_usec = c->timeout; | |
1599 | return 1; | |
1600 | } | |
1601 | ||
1602 | static int process_timeout(sd_bus *bus) { | |
eb01ba5d | 1603 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 LP |
1604 | struct reply_callback *c; |
1605 | usec_t n; | |
1606 | int r; | |
1607 | ||
1608 | assert(bus); | |
1609 | ||
1610 | c = prioq_peek(bus->reply_callbacks_prioq); | |
1611 | if (!c) | |
1612 | return 0; | |
1613 | ||
1614 | n = now(CLOCK_MONOTONIC); | |
1615 | if (c->timeout > n) | |
1616 | return 0; | |
1617 | ||
eb01ba5d LP |
1618 | r = bus_message_new_synthetic_error( |
1619 | bus, | |
1620 | c->serial, | |
1621 | &SD_BUS_ERROR_MAKE("org.freedesktop.DBus.Error.Timeout", "Timed out"), | |
1622 | &m); | |
1623 | if (r < 0) | |
1624 | return r; | |
1625 | ||
e3017af9 LP |
1626 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
1627 | hashmap_remove(bus->reply_callbacks, &c->serial); | |
1628 | ||
eb01ba5d | 1629 | r = c->callback(bus, m, c->userdata); |
e3017af9 LP |
1630 | free(c); |
1631 | ||
1632 | return r < 0 ? r : 1; | |
1633 | } | |
1634 | ||
9d373862 LP |
1635 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
1636 | assert(bus); | |
1637 | assert(m); | |
1638 | ||
1639 | if (bus->state != BUS_HELLO) | |
1640 | return 0; | |
1641 | ||
1642 | /* Let's make sure the first message on the bus is the HELLO | |
1643 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
1644 | * here (we leave that to the usual handling), we just verify |
1645 | * we don't let any earlier msg through. */ | |
9d373862 LP |
1646 | |
1647 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_RETURN && | |
1648 | m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_ERROR) | |
1649 | return -EIO; | |
1650 | ||
1651 | if (m->reply_serial != bus->hello_serial) | |
1652 | return -EIO; | |
1653 | ||
1654 | return 0; | |
1655 | } | |
1656 | ||
a652755d LP |
1657 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
1658 | struct reply_callback *c; | |
1659 | int r; | |
1660 | ||
1661 | assert(bus); | |
1662 | assert(m); | |
1663 | ||
1664 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_RETURN && | |
1665 | m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_ERROR) | |
1666 | return 0; | |
1667 | ||
1668 | c = hashmap_remove(bus->reply_callbacks, &m->reply_serial); | |
1669 | if (!c) | |
1670 | return 0; | |
1671 | ||
1672 | if (c->timeout != 0) | |
1673 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1674 | ||
88fe224c LP |
1675 | r = sd_bus_message_rewind(m, true); |
1676 | if (r < 0) | |
1677 | return r; | |
1678 | ||
eb01ba5d | 1679 | r = c->callback(bus, m, c->userdata); |
a652755d LP |
1680 | free(c); |
1681 | ||
1682 | return r; | |
1683 | } | |
1684 | ||
1685 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
1686 | struct filter_callback *l; | |
1687 | int r; | |
1688 | ||
392d5b37 LP |
1689 | assert(bus); |
1690 | assert(m); | |
1691 | ||
7286037f LP |
1692 | do { |
1693 | bus->filter_callbacks_modified = false; | |
1694 | ||
1695 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1696 | ||
1697 | if (bus->filter_callbacks_modified) | |
1698 | break; | |
1699 | ||
1700 | /* Don't run this more than once per iteration */ | |
1701 | if (l->last_iteration == bus->iteration_counter) | |
1702 | continue; | |
1703 | ||
1704 | l->last_iteration = bus->iteration_counter; | |
1705 | ||
88fe224c LP |
1706 | r = sd_bus_message_rewind(m, true); |
1707 | if (r < 0) | |
1708 | return r; | |
1709 | ||
eb01ba5d | 1710 | r = l->callback(bus, m, l->userdata); |
7286037f LP |
1711 | if (r != 0) |
1712 | return r; | |
1713 | ||
1714 | } | |
1715 | ||
1716 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
1717 | |
1718 | return 0; | |
1719 | } | |
1720 | ||
392d5b37 | 1721 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
1722 | int r; |
1723 | ||
392d5b37 LP |
1724 | assert(bus); |
1725 | assert(m); | |
1726 | ||
7286037f LP |
1727 | do { |
1728 | bus->match_callbacks_modified = false; | |
1729 | ||
eb01ba5d | 1730 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
1731 | if (r != 0) |
1732 | return r; | |
1733 | ||
1734 | } while (bus->match_callbacks_modified); | |
1735 | ||
1736 | return 0; | |
392d5b37 LP |
1737 | } |
1738 | ||
b9bf7e2b LP |
1739 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
1740 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
1741 | int r; | |
1742 | ||
1743 | assert(bus); | |
1744 | assert(m); | |
1745 | ||
1746 | if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) | |
1747 | return 0; | |
1748 | ||
1749 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
1750 | return 0; | |
1751 | ||
1752 | if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) | |
1753 | return 1; | |
1754 | ||
1755 | if (streq_ptr(m->member, "Ping")) | |
1756 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1757 | else if (streq_ptr(m->member, "GetMachineId")) { | |
1758 | sd_id128_t id; | |
1759 | char sid[33]; | |
1760 | ||
1761 | r = sd_id128_get_machine(&id); | |
1762 | if (r < 0) | |
1763 | return r; | |
1764 | ||
1765 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1766 | if (r < 0) | |
1767 | return r; | |
1768 | ||
1769 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
1770 | } else { | |
29ddb38f LP |
1771 | r = sd_bus_message_new_method_errorf( |
1772 | bus, m, &reply, | |
1773 | "org.freedesktop.DBus.Error.UnknownMethod", | |
b9bf7e2b | 1774 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
1775 | } |
1776 | ||
1777 | if (r < 0) | |
1778 | return r; | |
1779 | ||
1780 | r = sd_bus_send(bus, reply, NULL); | |
1781 | if (r < 0) | |
1782 | return r; | |
1783 | ||
1784 | return 1; | |
1785 | } | |
1786 | ||
992c052c | 1787 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
1788 | int r; |
1789 | ||
1790 | assert(bus); | |
992c052c | 1791 | assert(m); |
e3017af9 | 1792 | |
992c052c | 1793 | bus->iteration_counter++; |
e3017af9 | 1794 | |
992c052c LP |
1795 | r = process_hello(bus, m); |
1796 | if (r != 0) | |
1797 | return r; | |
a652755d | 1798 | |
992c052c LP |
1799 | r = process_reply(bus, m); |
1800 | if (r != 0) | |
1801 | return r; | |
e3017af9 | 1802 | |
992c052c LP |
1803 | r = process_filter(bus, m); |
1804 | if (r != 0) | |
1805 | return r; | |
a652755d | 1806 | |
992c052c LP |
1807 | r = process_match(bus, m); |
1808 | if (r != 0) | |
1809 | return r; | |
a652755d | 1810 | |
992c052c LP |
1811 | r = process_builtin(bus, m); |
1812 | if (r != 0) | |
29ddb38f | 1813 | return r; |
a652755d | 1814 | |
992c052c | 1815 | return bus_process_object(bus, m); |
29ddb38f | 1816 | } |
88fe224c | 1817 | |
992c052c LP |
1818 | static int process_running(sd_bus *bus, sd_bus_message **ret) { |
1819 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
29ddb38f | 1820 | int r; |
a652755d | 1821 | |
29ddb38f | 1822 | assert(bus); |
992c052c | 1823 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 1824 | |
992c052c LP |
1825 | r = process_timeout(bus); |
1826 | if (r != 0) | |
1827 | goto null_message; | |
7286037f | 1828 | |
992c052c LP |
1829 | r = dispatch_wqueue(bus); |
1830 | if (r != 0) | |
1831 | goto null_message; | |
7286037f | 1832 | |
992c052c LP |
1833 | r = dispatch_rqueue(bus, &m); |
1834 | if (r < 0) | |
1835 | return r; | |
1836 | if (!m) | |
1837 | goto null_message; | |
7286037f | 1838 | |
992c052c LP |
1839 | r = process_message(bus, m); |
1840 | if (r != 0) | |
1841 | goto null_message; | |
7286037f | 1842 | |
992c052c LP |
1843 | if (ret) { |
1844 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
1845 | if (r < 0) |
1846 | return r; | |
e3017af9 | 1847 | |
992c052c LP |
1848 | *ret = m; |
1849 | m = NULL; | |
1850 | return 1; | |
1851 | } | |
a652755d | 1852 | |
992c052c | 1853 | if (m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_CALL) { |
a652755d | 1854 | |
992c052c LP |
1855 | r = sd_bus_reply_method_errorf( |
1856 | bus, m, | |
1857 | "org.freedesktop.DBus.Error.UnknownObject", | |
1858 | "Unknown object '%s'.", m->path); | |
29ddb38f LP |
1859 | if (r < 0) |
1860 | return r; | |
1861 | } | |
e3017af9 | 1862 | |
992c052c | 1863 | return 1; |
0a72c2bd | 1864 | |
992c052c LP |
1865 | null_message: |
1866 | if (r >= 0 && ret) | |
1867 | *ret = NULL; | |
0a72c2bd | 1868 | |
992c052c | 1869 | return r; |
29ddb38f | 1870 | } |
0a72c2bd | 1871 | |
992c052c | 1872 | int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
8ce2afd6 | 1873 | BUS_DONT_DESTROY(bus); |
29ddb38f | 1874 | int r; |
0a72c2bd | 1875 | |
992c052c LP |
1876 | /* Returns 0 when we didn't do anything. This should cause the |
1877 | * caller to invoke sd_bus_wait() before returning the next | |
1878 | * time. Returns > 0 when we did something, which possibly | |
1879 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 1880 | |
d6888822 LP |
1881 | assert_return(bus, -EINVAL); |
1882 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 1883 | |
992c052c | 1884 | /* We don't allow recursively invoking sd_bus_process(). */ |
d6888822 | 1885 | assert_return(!bus->processing, -EBUSY); |
0a72c2bd | 1886 | |
992c052c | 1887 | switch (bus->state) { |
0a72c2bd | 1888 | |
992c052c LP |
1889 | case BUS_UNSET: |
1890 | case BUS_CLOSED: | |
1891 | return -ENOTCONN; | |
0a72c2bd | 1892 | |
992c052c LP |
1893 | case BUS_OPENING: |
1894 | r = bus_socket_process_opening(bus); | |
1895 | if (r < 0) | |
29ddb38f | 1896 | return r; |
992c052c LP |
1897 | if (ret) |
1898 | *ret = NULL; | |
a652755d LP |
1899 | return r; |
1900 | ||
992c052c | 1901 | case BUS_AUTHENTICATING: |
392d5b37 | 1902 | |
992c052c | 1903 | r = bus_socket_process_authenticating(bus); |
29ddb38f LP |
1904 | if (r < 0) |
1905 | return r; | |
992c052c LP |
1906 | if (ret) |
1907 | *ret = NULL; | |
1908 | return r; | |
a652755d | 1909 | |
992c052c LP |
1910 | case BUS_RUNNING: |
1911 | case BUS_HELLO: | |
0a72c2bd | 1912 | |
992c052c LP |
1913 | bus->processing = true; |
1914 | r = process_running(bus, ret); | |
1915 | bus->processing = false; | |
43a43f50 | 1916 | |
43a43f50 | 1917 | return r; |
992c052c | 1918 | } |
43a43f50 | 1919 | |
992c052c | 1920 | assert_not_reached("Unknown state"); |
e3017af9 LP |
1921 | } |
1922 | ||
992c052c LP |
1923 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
1924 | struct pollfd p[2] = {}; | |
1925 | int r, e, n; | |
1926 | struct timespec ts; | |
1927 | usec_t until, m; | |
adcdb374 LP |
1928 | |
1929 | assert(bus); | |
d6888822 | 1930 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); |
adcdb374 | 1931 | |
992c052c LP |
1932 | e = sd_bus_get_events(bus); |
1933 | if (e < 0) | |
1934 | return e; | |
adcdb374 | 1935 | |
992c052c LP |
1936 | if (need_more) |
1937 | e |= POLLIN; | |
9db76355 | 1938 | |
992c052c LP |
1939 | r = sd_bus_get_timeout(bus, &until); |
1940 | if (r < 0) | |
1941 | return r; | |
1942 | if (r == 0) | |
1943 | m = (uint64_t) -1; | |
1944 | else { | |
1945 | usec_t nw; | |
1946 | nw = now(CLOCK_MONOTONIC); | |
1947 | m = until > nw ? until - nw : 0; | |
1948 | } | |
adcdb374 | 1949 | |
992c052c LP |
1950 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
1951 | m = timeout_usec; | |
adcdb374 | 1952 | |
992c052c LP |
1953 | p[0].fd = bus->input_fd; |
1954 | if (bus->output_fd == bus->input_fd) { | |
1955 | p[0].events = e; | |
1956 | n = 1; | |
1957 | } else { | |
1958 | p[0].events = e & POLLIN; | |
1959 | p[1].fd = bus->output_fd; | |
1960 | p[1].events = e & POLLOUT; | |
1961 | n = 2; | |
adcdb374 LP |
1962 | } |
1963 | ||
992c052c | 1964 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 1965 | if (r < 0) |
992c052c | 1966 | return -errno; |
adcdb374 | 1967 | |
992c052c | 1968 | return r > 0 ? 1 : 0; |
adcdb374 LP |
1969 | } |
1970 | ||
992c052c | 1971 | int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 1972 | |
d6888822 LP |
1973 | assert_return(bus, -EINVAL); |
1974 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1975 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
9db76355 | 1976 | |
992c052c LP |
1977 | if (bus->rqueue_size > 0) |
1978 | return 0; | |
9db76355 | 1979 | |
992c052c LP |
1980 | return bus_poll(bus, false, timeout_usec); |
1981 | } | |
9db76355 | 1982 | |
992c052c LP |
1983 | int sd_bus_flush(sd_bus *bus) { |
1984 | int r; | |
9db76355 | 1985 | |
d6888822 LP |
1986 | assert_return(bus, -EINVAL); |
1987 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1988 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
9db76355 | 1989 | |
992c052c LP |
1990 | r = bus_ensure_running(bus); |
1991 | if (r < 0) | |
1992 | return r; | |
9db76355 | 1993 | |
992c052c LP |
1994 | if (bus->wqueue_size <= 0) |
1995 | return 0; | |
9db76355 | 1996 | |
992c052c LP |
1997 | for (;;) { |
1998 | r = dispatch_wqueue(bus); | |
9db76355 LP |
1999 | if (r < 0) |
2000 | return r; | |
2001 | ||
992c052c LP |
2002 | if (bus->wqueue_size <= 0) |
2003 | return 0; | |
9db76355 | 2004 | |
992c052c | 2005 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2006 | if (r < 0) |
2007 | return r; | |
9db76355 | 2008 | } |
9db76355 LP |
2009 | } |
2010 | ||
992c052c LP |
2011 | int sd_bus_add_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) { |
2012 | struct filter_callback *f; | |
de1c301e | 2013 | |
d6888822 LP |
2014 | assert_return(bus, -EINVAL); |
2015 | assert_return(callback, -EINVAL); | |
2016 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2017 | |
992c052c LP |
2018 | f = new0(struct filter_callback, 1); |
2019 | if (!f) | |
29ddb38f | 2020 | return -ENOMEM; |
992c052c LP |
2021 | f->callback = callback; |
2022 | f->userdata = userdata; | |
29ddb38f | 2023 | |
992c052c | 2024 | bus->filter_callbacks_modified = true; |
71fda00f | 2025 | LIST_PREPEND(callbacks, bus->filter_callbacks, f); |
de1c301e LP |
2026 | return 0; |
2027 | } | |
a652755d | 2028 | |
992c052c LP |
2029 | int sd_bus_remove_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) { |
2030 | struct filter_callback *f; | |
a652755d | 2031 | |
d6888822 LP |
2032 | assert_return(bus, -EINVAL); |
2033 | assert_return(callback, -EINVAL); | |
2034 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
a652755d | 2035 | |
992c052c LP |
2036 | LIST_FOREACH(callbacks, f, bus->filter_callbacks) { |
2037 | if (f->callback == callback && f->userdata == userdata) { | |
2038 | bus->filter_callbacks_modified = true; | |
71fda00f | 2039 | LIST_REMOVE(callbacks, bus->filter_callbacks, f); |
992c052c LP |
2040 | free(f); |
2041 | return 1; | |
29ddb38f LP |
2042 | } |
2043 | } | |
2044 | ||
992c052c | 2045 | return 0; |
a652755d | 2046 | } |
392d5b37 | 2047 | |
992c052c LP |
2048 | int sd_bus_add_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) { |
2049 | struct bus_match_component *components = NULL; | |
2050 | unsigned n_components = 0; | |
2051 | uint64_t cookie = 0; | |
2052 | int r = 0; | |
392d5b37 | 2053 | |
d6888822 LP |
2054 | assert_return(bus, -EINVAL); |
2055 | assert_return(match, -EINVAL); | |
2056 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2057 | |
992c052c LP |
2058 | r = bus_match_parse(match, &components, &n_components); |
2059 | if (r < 0) | |
2060 | goto finish; | |
29ddb38f | 2061 | |
992c052c LP |
2062 | if (bus->bus_client) { |
2063 | cookie = ++bus->match_cookie; | |
29ddb38f | 2064 | |
992c052c LP |
2065 | r = bus_add_match_internal(bus, match, components, n_components, cookie); |
2066 | if (r < 0) | |
2067 | goto finish; | |
392d5b37 LP |
2068 | } |
2069 | ||
992c052c LP |
2070 | bus->match_callbacks_modified = true; |
2071 | r = bus_match_add(&bus->match_callbacks, components, n_components, callback, userdata, cookie, NULL); | |
29ddb38f | 2072 | if (r < 0) { |
992c052c LP |
2073 | if (bus->bus_client) |
2074 | bus_remove_match_internal(bus, match, cookie); | |
29ddb38f | 2075 | } |
917b5dc7 | 2076 | |
992c052c LP |
2077 | finish: |
2078 | bus_match_parse_free(components, n_components); | |
2079 | return r; | |
917b5dc7 LP |
2080 | } |
2081 | ||
992c052c LP |
2082 | int sd_bus_remove_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) { |
2083 | struct bus_match_component *components = NULL; | |
2084 | unsigned n_components = 0; | |
2085 | int r = 0, q = 0; | |
2086 | uint64_t cookie = 0; | |
917b5dc7 | 2087 | |
d6888822 LP |
2088 | assert_return(bus, -EINVAL); |
2089 | assert_return(match, -EINVAL); | |
2090 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 2091 | |
992c052c | 2092 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f LP |
2093 | if (r < 0) |
2094 | return r; | |
f10dda3b | 2095 | |
992c052c LP |
2096 | bus->match_callbacks_modified = true; |
2097 | r = bus_match_remove(&bus->match_callbacks, components, n_components, callback, userdata, &cookie); | |
f10dda3b | 2098 | |
992c052c LP |
2099 | if (bus->bus_client) |
2100 | q = bus_remove_match_internal(bus, match, cookie); | |
f10dda3b | 2101 | |
992c052c | 2102 | bus_match_parse_free(components, n_components); |
f10dda3b | 2103 | |
992c052c | 2104 | return r < 0 ? r : q; |
f10dda3b LP |
2105 | } |
2106 | ||
992c052c LP |
2107 | bool bus_pid_changed(sd_bus *bus) { |
2108 | assert(bus); | |
f10dda3b | 2109 | |
992c052c LP |
2110 | /* We don't support people creating a bus connection and |
2111 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 2112 | |
992c052c | 2113 | return bus->original_pid != getpid(); |
d5a2b9a6 | 2114 | } |