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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" |
ab9001a1 | 37 | #include "def.h" |
af08d2f9 | 38 | #include "cgroup-util.h" |
de1c301e LP |
39 | |
40 | #include "sd-bus.h" | |
41 | #include "bus-internal.h" | |
42 | #include "bus-message.h" | |
43 | #include "bus-type.h" | |
a7e3212d | 44 | #include "bus-socket.h" |
6629161f | 45 | #include "bus-kernel.h" |
392d5b37 | 46 | #include "bus-control.h" |
29ddb38f LP |
47 | #include "bus-introspect.h" |
48 | #include "bus-signature.h" | |
992c052c | 49 | #include "bus-objects.h" |
40ca29a1 | 50 | #include "bus-util.h" |
a7893c6b | 51 | #include "bus-container.h" |
0461f8cd | 52 | #include "bus-protocol.h" |
de1c301e | 53 | |
e3017af9 | 54 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
1e05d493 LP |
55 | static int attach_io_events(sd_bus *b); |
56 | static void detach_io_events(sd_bus *b); | |
e3017af9 | 57 | |
f54514f3 LP |
58 | static void bus_close_fds(sd_bus *b) { |
59 | assert(b); | |
60 | ||
1e05d493 LP |
61 | detach_io_events(b); |
62 | ||
f54514f3 LP |
63 | if (b->input_fd >= 0) |
64 | close_nointr_nofail(b->input_fd); | |
65 | ||
66 | if (b->output_fd >= 0 && b->output_fd != b->input_fd) | |
67 | close_nointr_nofail(b->output_fd); | |
68 | ||
69 | b->input_fd = b->output_fd = -1; | |
70 | } | |
71 | ||
29ddb38f LP |
72 | static void bus_node_destroy(sd_bus *b, struct node *n) { |
73 | struct node_callback *c; | |
74 | struct node_vtable *v; | |
75 | struct node_enumerator *e; | |
76 | ||
77 | assert(b); | |
78 | ||
79 | if (!n) | |
80 | return; | |
81 | ||
82 | while (n->child) | |
83 | bus_node_destroy(b, n->child); | |
84 | ||
85 | while ((c = n->callbacks)) { | |
71fda00f | 86 | LIST_REMOVE(callbacks, n->callbacks, c); |
29ddb38f LP |
87 | free(c); |
88 | } | |
89 | ||
90 | while ((v = n->vtables)) { | |
71fda00f | 91 | LIST_REMOVE(vtables, n->vtables, v); |
29ddb38f LP |
92 | free(v->interface); |
93 | free(v); | |
94 | } | |
95 | ||
96 | while ((e = n->enumerators)) { | |
71fda00f | 97 | LIST_REMOVE(enumerators, n->enumerators, e); |
29ddb38f LP |
98 | free(e); |
99 | } | |
100 | ||
101 | if (n->parent) | |
71fda00f | 102 | LIST_REMOVE(siblings, n->parent->child, n); |
29ddb38f LP |
103 | |
104 | assert_se(hashmap_remove(b->nodes, n->path) == n); | |
105 | free(n->path); | |
106 | free(n); | |
107 | } | |
108 | ||
0e586eae | 109 | static void bus_reset_queues(sd_bus *b) { |
0e586eae LP |
110 | assert(b); |
111 | ||
f389bf15 LP |
112 | while (b->rqueue_size > 0) |
113 | sd_bus_message_unref(b->rqueue[--b->rqueue_size]); | |
114 | ||
0e586eae | 115 | free(b->rqueue); |
f389bf15 LP |
116 | b->rqueue = NULL; |
117 | b->rqueue_allocated = 0; | |
0e586eae | 118 | |
f389bf15 LP |
119 | while (b->wqueue_size > 0) |
120 | sd_bus_message_unref(b->wqueue[--b->wqueue_size]); | |
0e586eae | 121 | |
f389bf15 LP |
122 | free(b->wqueue); |
123 | b->wqueue = NULL; | |
124 | b->wqueue_allocated = 0; | |
0e586eae LP |
125 | } |
126 | ||
de1c301e LP |
127 | static void bus_free(sd_bus *b) { |
128 | struct filter_callback *f; | |
29ddb38f | 129 | struct node *n; |
de1c301e LP |
130 | |
131 | assert(b); | |
132 | ||
40ca29a1 LP |
133 | sd_bus_detach_event(b); |
134 | ||
f54514f3 | 135 | bus_close_fds(b); |
de1c301e | 136 | |
63edf05e LP |
137 | if (b->kdbus_buffer) |
138 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
139 | ||
de1c301e | 140 | free(b->rbuffer); |
89ffcd2a | 141 | free(b->unique_name); |
2181a7f5 | 142 | free(b->auth_buffer); |
89ffcd2a | 143 | free(b->address); |
e9a967f9 | 144 | free(b->kernel); |
a7893c6b | 145 | free(b->machine); |
8a0e0ed9 | 146 | free(b->fake_label); |
751bc6ac | 147 | free(b->cgroup_root); |
5972fe95 | 148 | free(b->connection_name); |
89ffcd2a | 149 | |
2fd9ae2e LP |
150 | free(b->exec_path); |
151 | strv_free(b->exec_argv); | |
152 | ||
2c93b4ef LP |
153 | close_many(b->fds, b->n_fds); |
154 | free(b->fds); | |
155 | ||
0e586eae | 156 | bus_reset_queues(b); |
de1c301e LP |
157 | |
158 | hashmap_free_free(b->reply_callbacks); | |
e3017af9 | 159 | prioq_free(b->reply_callbacks_prioq); |
de1c301e LP |
160 | |
161 | while ((f = b->filter_callbacks)) { | |
71fda00f | 162 | LIST_REMOVE(callbacks, b->filter_callbacks, f); |
de1c301e LP |
163 | free(f); |
164 | } | |
165 | ||
392d5b37 LP |
166 | bus_match_free(&b->match_callbacks); |
167 | ||
29ddb38f LP |
168 | hashmap_free_free(b->vtable_methods); |
169 | hashmap_free_free(b->vtable_properties); | |
170 | ||
171 | while ((n = hashmap_first(b->nodes))) | |
172 | bus_node_destroy(b, n); | |
173 | ||
174 | hashmap_free(b->nodes); | |
175 | ||
bc7fd8cd LP |
176 | bus_kernel_flush_memfd(b); |
177 | ||
45fbe937 LP |
178 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
179 | ||
de1c301e LP |
180 | free(b); |
181 | } | |
182 | ||
d9f644e2 | 183 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
184 | sd_bus *r; |
185 | ||
d6888822 | 186 | assert_return(ret, -EINVAL); |
021a1e78 | 187 | |
de1c301e LP |
188 | r = new0(sd_bus, 1); |
189 | if (!r) | |
021a1e78 | 190 | return -ENOMEM; |
de1c301e | 191 | |
e4ee6e5c | 192 | r->n_ref = REFCNT_INIT; |
e82c9509 | 193 | r->input_fd = r->output_fd = -1; |
de1c301e | 194 | r->message_version = 1; |
3310dfd5 | 195 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
d21a7bb1 DM |
196 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
197 | r->attach_flags |= KDBUS_ATTACH_NAMES; | |
d5a2b9a6 | 198 | r->original_pid = getpid(); |
de1c301e | 199 | |
45fbe937 LP |
200 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
201 | ||
de1c301e LP |
202 | /* We guarantee that wqueue always has space for at least one |
203 | * entry */ | |
821e0756 | 204 | if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) { |
de1c301e | 205 | free(r); |
021a1e78 | 206 | return -ENOMEM; |
de1c301e LP |
207 | } |
208 | ||
021a1e78 LP |
209 | *ret = r; |
210 | return 0; | |
211 | } | |
212 | ||
d9f644e2 | 213 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
214 | char *a; |
215 | ||
d6888822 LP |
216 | assert_return(bus, -EINVAL); |
217 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
218 | assert_return(address, -EINVAL); | |
219 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
220 | |
221 | a = strdup(address); | |
222 | if (!a) | |
223 | return -ENOMEM; | |
224 | ||
225 | free(bus->address); | |
226 | bus->address = a; | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
d9f644e2 | 231 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
232 | assert_return(bus, -EINVAL); |
233 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
234 | assert_return(input_fd >= 0, -EINVAL); | |
235 | assert_return(output_fd >= 0, -EINVAL); | |
236 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 237 | |
e82c9509 LP |
238 | bus->input_fd = input_fd; |
239 | bus->output_fd = output_fd; | |
021a1e78 LP |
240 | return 0; |
241 | } | |
242 | ||
d9f644e2 | 243 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
244 | char *p, **a; |
245 | ||
d6888822 LP |
246 | assert_return(bus, -EINVAL); |
247 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
248 | assert_return(path, -EINVAL); | |
249 | assert_return(!strv_isempty(argv), -EINVAL); | |
250 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
251 | |
252 | p = strdup(path); | |
253 | if (!p) | |
254 | return -ENOMEM; | |
255 | ||
256 | a = strv_copy(argv); | |
257 | if (!a) { | |
258 | free(p); | |
259 | return -ENOMEM; | |
260 | } | |
261 | ||
262 | free(bus->exec_path); | |
263 | strv_free(bus->exec_argv); | |
264 | ||
265 | bus->exec_path = p; | |
266 | bus->exec_argv = a; | |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
d9f644e2 | 271 | _public_ int sd_bus_set_bus_client(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); | |
021a1e78 | 275 | |
94bbf1ba | 276 | bus->bus_client = !!b; |
021a1e78 LP |
277 | return 0; |
278 | } | |
279 | ||
d9f644e2 | 280 | _public_ int sd_bus_negotiate_fds(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); | |
021a1e78 | 284 | |
264ad849 LP |
285 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
286 | return 0; | |
287 | } | |
288 | ||
4fc31988 | 289 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
16be4368 KS |
290 | assert_return(bus, -EINVAL); |
291 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
292 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
293 | ||
d21a7bb1 | 294 | SET_FLAG(bus->attach_flags, KDBUS_ATTACH_TIMESTAMP, b); |
16be4368 KS |
295 | return 0; |
296 | } | |
297 | ||
4fc31988 | 298 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, uint64_t mask) { |
16be4368 | 299 | assert_return(bus, -EINVAL); |
95c4fe82 | 300 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
16be4368 KS |
301 | assert_return(bus->state == BUS_UNSET, -EPERM); |
302 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
303 | ||
49b832c5 | 304 | /* The well knowns we need unconditionally, so that matches can work */ |
3310dfd5 | 305 | bus->creds_mask = mask | SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
49b832c5 | 306 | |
3310dfd5 | 307 | return kdbus_translate_attach_flags(bus->creds_mask, &bus->creds_mask); |
021a1e78 | 308 | } |
de1c301e | 309 | |
d9f644e2 | 310 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
311 | assert_return(bus, -EINVAL); |
312 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
313 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
314 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
315 | |
316 | bus->is_server = !!b; | |
98178d39 | 317 | bus->server_id = server_id; |
2181a7f5 LP |
318 | return 0; |
319 | } | |
320 | ||
d9f644e2 | 321 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
322 | assert_return(bus, -EINVAL); |
323 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
324 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
325 | |
326 | bus->anonymous_auth = !!b; | |
327 | return 0; | |
328 | } | |
329 | ||
adacb957 LP |
330 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
331 | assert_return(bus, -EINVAL); | |
332 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
333 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
334 | ||
335 | bus->trusted = !!b; | |
336 | return 0; | |
337 | } | |
338 | ||
5972fe95 LP |
339 | _public_ int sd_bus_set_name(sd_bus *bus, const char *name) { |
340 | char *n; | |
341 | ||
342 | assert_return(bus, -EINVAL); | |
343 | assert_return(name, -EINVAL); | |
344 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
345 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
346 | ||
347 | n = strdup(name); | |
348 | if (!n) | |
349 | return -ENOMEM; | |
350 | ||
351 | free(bus->connection_name); | |
352 | bus->connection_name = n; | |
353 | ||
354 | return 0; | |
355 | } | |
356 | ||
ebcf1f97 | 357 | static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e LP |
358 | const char *s; |
359 | int r; | |
360 | ||
361 | assert(bus); | |
c99c09a2 | 362 | assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING); |
de1c301e LP |
363 | assert(reply); |
364 | ||
40ca29a1 | 365 | r = sd_bus_message_get_errno(reply); |
eb01ba5d LP |
366 | if (r < 0) |
367 | return r; | |
40ca29a1 LP |
368 | if (r > 0) |
369 | return -r; | |
eb01ba5d | 370 | |
de1c301e LP |
371 | r = sd_bus_message_read(reply, "s", &s); |
372 | if (r < 0) | |
373 | return r; | |
374 | ||
dafb7591 LP |
375 | if (!service_name_is_valid(s) || s[0] != ':') |
376 | return -EBADMSG; | |
377 | ||
de1c301e LP |
378 | bus->unique_name = strdup(s); |
379 | if (!bus->unique_name) | |
380 | return -ENOMEM; | |
381 | ||
c99c09a2 LP |
382 | if (bus->state == BUS_HELLO) |
383 | bus->state = BUS_RUNNING; | |
dafb7591 | 384 | |
de1c301e LP |
385 | return 1; |
386 | } | |
387 | ||
388 | static int bus_send_hello(sd_bus *bus) { | |
389 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
390 | int r; | |
391 | ||
392 | assert(bus); | |
393 | ||
6629161f | 394 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
395 | return 0; |
396 | ||
de1c301e LP |
397 | r = sd_bus_message_new_method_call( |
398 | bus, | |
399 | "org.freedesktop.DBus", | |
a7639e37 | 400 | "/org/freedesktop/DBus", |
de1c301e LP |
401 | "org.freedesktop.DBus", |
402 | "Hello", | |
403 | &m); | |
404 | if (r < 0) | |
405 | return r; | |
406 | ||
693eb9a2 | 407 | return sd_bus_call_async(bus, m, hello_callback, NULL, 0, &bus->hello_cookie); |
de1c301e LP |
408 | } |
409 | ||
a7e3212d | 410 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
411 | assert(bus); |
412 | ||
f08838da | 413 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 414 | bus->state = BUS_HELLO; |
e3017af9 | 415 | return 1; |
de1c301e LP |
416 | } |
417 | ||
418 | bus->state = BUS_RUNNING; | |
e3017af9 | 419 | return 1; |
de1c301e LP |
420 | } |
421 | ||
422 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 423 | size_t l, n = 0, allocated = 0; |
de1c301e LP |
424 | const char *a; |
425 | char *r = NULL; | |
426 | ||
427 | assert(p); | |
428 | assert(*p); | |
de1c301e LP |
429 | assert(value); |
430 | ||
2fd9ae2e LP |
431 | if (key) { |
432 | l = strlen(key); | |
433 | if (strncmp(*p, key, l) != 0) | |
434 | return 0; | |
de1c301e | 435 | |
2fd9ae2e LP |
436 | if ((*p)[l] != '=') |
437 | return 0; | |
de1c301e | 438 | |
2fd9ae2e LP |
439 | if (*value) |
440 | return -EINVAL; | |
de1c301e | 441 | |
2fd9ae2e LP |
442 | a = *p + l + 1; |
443 | } else | |
444 | a = *p; | |
445 | ||
446 | while (*a != ';' && *a != ',' && *a != 0) { | |
821e0756 | 447 | char c; |
de1c301e LP |
448 | |
449 | if (*a == '%') { | |
450 | int x, y; | |
451 | ||
452 | x = unhexchar(a[1]); | |
453 | if (x < 0) { | |
454 | free(r); | |
455 | return x; | |
456 | } | |
457 | ||
458 | y = unhexchar(a[2]); | |
459 | if (y < 0) { | |
460 | free(r); | |
461 | return y; | |
462 | } | |
463 | ||
de1c301e | 464 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
465 | a += 3; |
466 | } else { | |
de1c301e | 467 | c = *a; |
89ffcd2a LP |
468 | a++; |
469 | } | |
de1c301e | 470 | |
821e0756 | 471 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 472 | return -ENOMEM; |
de1c301e | 473 | |
de1c301e LP |
474 | r[n++] = c; |
475 | } | |
476 | ||
89ffcd2a LP |
477 | if (!r) { |
478 | r = strdup(""); | |
479 | if (!r) | |
480 | return -ENOMEM; | |
481 | } else | |
482 | r[n] = 0; | |
483 | ||
484 | if (*a == ',') | |
485 | a++; | |
486 | ||
de1c301e | 487 | *p = a; |
2fd9ae2e LP |
488 | |
489 | free(*value); | |
de1c301e | 490 | *value = r; |
2fd9ae2e | 491 | |
de1c301e LP |
492 | return 1; |
493 | } | |
494 | ||
495 | static void skip_address_key(const char **p) { | |
496 | assert(p); | |
497 | assert(*p); | |
498 | ||
89ffcd2a LP |
499 | *p += strcspn(*p, ","); |
500 | ||
501 | if (**p == ',') | |
502 | (*p) ++; | |
de1c301e LP |
503 | } |
504 | ||
2fd9ae2e LP |
505 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
506 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
507 | size_t l; | |
de1c301e LP |
508 | int r; |
509 | ||
510 | assert(b); | |
2fd9ae2e LP |
511 | assert(p); |
512 | assert(*p); | |
513 | assert(guid); | |
de1c301e | 514 | |
2fd9ae2e LP |
515 | while (**p != 0 && **p != ';') { |
516 | r = parse_address_key(p, "guid", guid); | |
517 | if (r < 0) | |
518 | return r; | |
519 | else if (r > 0) | |
520 | continue; | |
de1c301e | 521 | |
2fd9ae2e LP |
522 | r = parse_address_key(p, "path", &path); |
523 | if (r < 0) | |
524 | return r; | |
525 | else if (r > 0) | |
526 | continue; | |
de1c301e | 527 | |
2fd9ae2e LP |
528 | r = parse_address_key(p, "abstract", &abstract); |
529 | if (r < 0) | |
530 | return r; | |
531 | else if (r > 0) | |
532 | continue; | |
de1c301e | 533 | |
2fd9ae2e LP |
534 | skip_address_key(p); |
535 | } | |
de1c301e | 536 | |
2fd9ae2e LP |
537 | if (!path && !abstract) |
538 | return -EINVAL; | |
de1c301e | 539 | |
2fd9ae2e LP |
540 | if (path && abstract) |
541 | return -EINVAL; | |
542 | ||
543 | if (path) { | |
544 | l = strlen(path); | |
545 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
546 | return -E2BIG; | |
de1c301e | 547 | |
2fd9ae2e LP |
548 | b->sockaddr.un.sun_family = AF_UNIX; |
549 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
550 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
551 | } else if (abstract) { | |
552 | l = strlen(abstract); | |
553 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
554 | return -E2BIG; | |
555 | ||
556 | b->sockaddr.un.sun_family = AF_UNIX; | |
557 | b->sockaddr.un.sun_path[0] = 0; | |
558 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
559 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
560 | } | |
561 | ||
562 | return 0; | |
563 | } | |
564 | ||
565 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
566 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 567 | int r; |
b92bea5d ZJS |
568 | struct addrinfo *result, hints = { |
569 | .ai_socktype = SOCK_STREAM, | |
570 | .ai_flags = AI_ADDRCONFIG, | |
571 | }; | |
2fd9ae2e LP |
572 | |
573 | assert(b); | |
574 | assert(p); | |
575 | assert(*p); | |
576 | assert(guid); | |
577 | ||
578 | while (**p != 0 && **p != ';') { | |
579 | r = parse_address_key(p, "guid", guid); | |
580 | if (r < 0) | |
581 | return r; | |
582 | else if (r > 0) | |
583 | continue; | |
584 | ||
585 | r = parse_address_key(p, "host", &host); | |
586 | if (r < 0) | |
587 | return r; | |
588 | else if (r > 0) | |
589 | continue; | |
590 | ||
591 | r = parse_address_key(p, "port", &port); | |
592 | if (r < 0) | |
593 | return r; | |
594 | else if (r > 0) | |
595 | continue; | |
596 | ||
597 | r = parse_address_key(p, "family", &family); | |
598 | if (r < 0) | |
599 | return r; | |
600 | else if (r > 0) | |
601 | continue; | |
602 | ||
603 | skip_address_key(p); | |
604 | } | |
605 | ||
606 | if (!host || !port) | |
607 | return -EINVAL; | |
608 | ||
2fd9ae2e LP |
609 | if (family) { |
610 | if (streq(family, "ipv4")) | |
611 | hints.ai_family = AF_INET; | |
612 | else if (streq(family, "ipv6")) | |
613 | hints.ai_family = AF_INET6; | |
614 | else | |
615 | return -EINVAL; | |
616 | } | |
617 | ||
618 | r = getaddrinfo(host, port, &hints, &result); | |
619 | if (r == EAI_SYSTEM) | |
620 | return -errno; | |
621 | else if (r != 0) | |
622 | return -EADDRNOTAVAIL; | |
623 | ||
624 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
625 | b->sockaddr_size = result->ai_addrlen; | |
626 | ||
627 | freeaddrinfo(result); | |
628 | ||
629 | return 0; | |
630 | } | |
631 | ||
632 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
633 | char *path = NULL; | |
634 | unsigned n_argv = 0, j; | |
635 | char **argv = NULL; | |
821e0756 | 636 | size_t allocated = 0; |
2fd9ae2e LP |
637 | int r; |
638 | ||
639 | assert(b); | |
640 | assert(p); | |
641 | assert(*p); | |
642 | assert(guid); | |
643 | ||
644 | while (**p != 0 && **p != ';') { | |
645 | r = parse_address_key(p, "guid", guid); | |
646 | if (r < 0) | |
647 | goto fail; | |
648 | else if (r > 0) | |
649 | continue; | |
650 | ||
651 | r = parse_address_key(p, "path", &path); | |
652 | if (r < 0) | |
653 | goto fail; | |
654 | else if (r > 0) | |
655 | continue; | |
656 | ||
657 | if (startswith(*p, "argv")) { | |
658 | unsigned ul; | |
659 | ||
660 | errno = 0; | |
661 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 662 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
663 | r = -EINVAL; |
664 | goto fail; | |
665 | } | |
666 | ||
667 | (*p) ++; | |
668 | ||
669 | if (ul >= n_argv) { | |
821e0756 | 670 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
671 | r = -ENOMEM; |
672 | goto fail; | |
673 | } | |
674 | ||
2fd9ae2e LP |
675 | n_argv = ul + 1; |
676 | } | |
677 | ||
678 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 679 | if (r < 0) |
2fd9ae2e | 680 | goto fail; |
de1c301e | 681 | |
2fd9ae2e | 682 | continue; |
de1c301e LP |
683 | } |
684 | ||
2fd9ae2e LP |
685 | skip_address_key(p); |
686 | } | |
de1c301e | 687 | |
5a0f6033 LP |
688 | if (!path) { |
689 | r = -EINVAL; | |
2fd9ae2e | 690 | goto fail; |
5a0f6033 | 691 | } |
de1c301e | 692 | |
2fd9ae2e LP |
693 | /* Make sure there are no holes in the array, with the |
694 | * exception of argv[0] */ | |
695 | for (j = 1; j < n_argv; j++) | |
696 | if (!argv[j]) { | |
697 | r = -EINVAL; | |
698 | goto fail; | |
699 | } | |
700 | ||
701 | if (argv && argv[0] == NULL) { | |
702 | argv[0] = strdup(path); | |
703 | if (!argv[0]) { | |
704 | r = -ENOMEM; | |
705 | goto fail; | |
706 | } | |
707 | } | |
de1c301e | 708 | |
2fd9ae2e LP |
709 | b->exec_path = path; |
710 | b->exec_argv = argv; | |
711 | return 0; | |
de1c301e | 712 | |
2fd9ae2e LP |
713 | fail: |
714 | for (j = 0; j < n_argv; j++) | |
715 | free(argv[j]); | |
716 | ||
717 | free(argv); | |
718 | free(path); | |
719 | return r; | |
720 | } | |
721 | ||
6629161f LP |
722 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
723 | _cleanup_free_ char *path = NULL; | |
724 | int r; | |
725 | ||
726 | assert(b); | |
727 | assert(p); | |
728 | assert(*p); | |
729 | assert(guid); | |
730 | ||
731 | while (**p != 0 && **p != ';') { | |
732 | r = parse_address_key(p, "guid", guid); | |
733 | if (r < 0) | |
734 | return r; | |
735 | else if (r > 0) | |
736 | continue; | |
737 | ||
738 | r = parse_address_key(p, "path", &path); | |
739 | if (r < 0) | |
740 | return r; | |
741 | else if (r > 0) | |
742 | continue; | |
743 | ||
744 | skip_address_key(p); | |
745 | } | |
746 | ||
747 | if (!path) | |
748 | return -EINVAL; | |
749 | ||
750 | free(b->kernel); | |
751 | b->kernel = path; | |
752 | path = NULL; | |
753 | ||
754 | return 0; | |
755 | } | |
756 | ||
bc9fd78c | 757 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
a7893c6b LP |
758 | _cleanup_free_ char *machine = NULL; |
759 | int r; | |
760 | ||
761 | assert(b); | |
762 | assert(p); | |
763 | assert(*p); | |
764 | assert(guid); | |
765 | ||
766 | while (**p != 0 && **p != ';') { | |
767 | r = parse_address_key(p, "guid", guid); | |
768 | if (r < 0) | |
769 | return r; | |
770 | else if (r > 0) | |
771 | continue; | |
772 | ||
773 | r = parse_address_key(p, "machine", &machine); | |
774 | if (r < 0) | |
775 | return r; | |
776 | else if (r > 0) | |
777 | continue; | |
778 | ||
779 | skip_address_key(p); | |
780 | } | |
781 | ||
782 | if (!machine) | |
783 | return -EINVAL; | |
784 | ||
b6741478 LP |
785 | if (!filename_is_safe(machine)) |
786 | return -EINVAL; | |
787 | ||
a7893c6b LP |
788 | free(b->machine); |
789 | b->machine = machine; | |
790 | machine = NULL; | |
791 | ||
792 | b->sockaddr.un.sun_family = AF_UNIX; | |
793 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); | |
794 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/var/run/dbus/system_bus_socket") - 1; | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
bc9fd78c LP |
799 | static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid) { |
800 | _cleanup_free_ char *machine = NULL; | |
801 | int r; | |
802 | ||
803 | assert(b); | |
804 | assert(p); | |
805 | assert(*p); | |
806 | assert(guid); | |
807 | ||
808 | while (**p != 0 && **p != ';') { | |
809 | r = parse_address_key(p, "guid", guid); | |
810 | if (r < 0) | |
811 | return r; | |
812 | else if (r > 0) | |
813 | continue; | |
814 | ||
815 | r = parse_address_key(p, "machine", &machine); | |
816 | if (r < 0) | |
817 | return r; | |
818 | else if (r > 0) | |
819 | continue; | |
820 | ||
821 | skip_address_key(p); | |
822 | } | |
823 | ||
824 | if (!machine) | |
825 | return -EINVAL; | |
826 | ||
827 | if (!filename_is_safe(machine)) | |
828 | return -EINVAL; | |
829 | ||
830 | free(b->machine); | |
831 | b->machine = machine; | |
832 | machine = NULL; | |
833 | ||
834 | free(b->kernel); | |
835 | b->kernel = strdup("/dev/kdbus/0-system/bus"); | |
836 | if (!b->kernel) | |
837 | return -ENOMEM; | |
838 | ||
839 | return 0; | |
840 | } | |
841 | ||
2fd9ae2e LP |
842 | static void bus_reset_parsed_address(sd_bus *b) { |
843 | assert(b); | |
844 | ||
845 | zero(b->sockaddr); | |
846 | b->sockaddr_size = 0; | |
847 | strv_free(b->exec_argv); | |
848 | free(b->exec_path); | |
849 | b->exec_path = NULL; | |
850 | b->exec_argv = NULL; | |
98178d39 | 851 | b->server_id = SD_ID128_NULL; |
6629161f LP |
852 | free(b->kernel); |
853 | b->kernel = NULL; | |
a7893c6b LP |
854 | free(b->machine); |
855 | b->machine = NULL; | |
2fd9ae2e LP |
856 | } |
857 | ||
858 | static int bus_parse_next_address(sd_bus *b) { | |
859 | _cleanup_free_ char *guid = NULL; | |
860 | const char *a; | |
861 | int r; | |
862 | ||
863 | assert(b); | |
864 | ||
865 | if (!b->address) | |
866 | return 0; | |
867 | if (b->address[b->address_index] == 0) | |
868 | return 0; | |
869 | ||
870 | bus_reset_parsed_address(b); | |
871 | ||
872 | a = b->address + b->address_index; | |
de1c301e | 873 | |
2fd9ae2e | 874 | while (*a != 0) { |
de1c301e | 875 | |
2fd9ae2e LP |
876 | if (*a == ';') { |
877 | a++; | |
878 | continue; | |
de1c301e LP |
879 | } |
880 | ||
2fd9ae2e LP |
881 | if (startswith(a, "unix:")) { |
882 | a += 5; | |
de1c301e | 883 | |
2fd9ae2e | 884 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
885 | if (r < 0) |
886 | return r; | |
2fd9ae2e | 887 | break; |
de1c301e | 888 | |
2fd9ae2e | 889 | } else if (startswith(a, "tcp:")) { |
de1c301e | 890 | |
2fd9ae2e LP |
891 | a += 4; |
892 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
893 | if (r < 0) |
894 | return r; | |
de1c301e | 895 | |
2fd9ae2e LP |
896 | break; |
897 | ||
898 | } else if (startswith(a, "unixexec:")) { | |
899 | ||
900 | a += 9; | |
901 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
902 | if (r < 0) |
903 | return r; | |
de1c301e | 904 | |
2fd9ae2e | 905 | break; |
de1c301e | 906 | |
6629161f LP |
907 | } else if (startswith(a, "kernel:")) { |
908 | ||
909 | a += 7; | |
910 | r = parse_kernel_address(b, &a, &guid); | |
911 | if (r < 0) | |
912 | return r; | |
913 | ||
a7893c6b | 914 | break; |
bc9fd78c LP |
915 | } else if (startswith(a, "x-container-unix:")) { |
916 | ||
917 | a += 17; | |
918 | r = parse_container_unix_address(b, &a, &guid); | |
919 | if (r < 0) | |
920 | return r; | |
921 | ||
922 | break; | |
923 | } else if (startswith(a, "x-container-kernel:")) { | |
a7893c6b | 924 | |
bc9fd78c LP |
925 | a += 19; |
926 | r = parse_container_kernel_address(b, &a, &guid); | |
a7893c6b LP |
927 | if (r < 0) |
928 | return r; | |
929 | ||
6629161f | 930 | break; |
de1c301e LP |
931 | } |
932 | ||
2fd9ae2e LP |
933 | a = strchr(a, ';'); |
934 | if (!a) | |
935 | return 0; | |
de1c301e LP |
936 | } |
937 | ||
938 | if (guid) { | |
98178d39 | 939 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
940 | if (r < 0) |
941 | return r; | |
942 | } | |
943 | ||
2fd9ae2e | 944 | b->address_index = a - b->address; |
de1c301e LP |
945 | return 1; |
946 | } | |
947 | ||
a7e3212d | 948 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
949 | int r; |
950 | ||
951 | assert(b); | |
952 | ||
953 | for (;;) { | |
1e05d493 | 954 | bool skipped = false; |
2fd9ae2e | 955 | |
1e05d493 | 956 | bus_close_fds(b); |
a7e3212d | 957 | |
1e05d493 | 958 | if (b->exec_path) |
a7893c6b | 959 | r = bus_socket_exec(b); |
bc9fd78c LP |
960 | else if (b->machine && b->kernel) |
961 | r = bus_container_connect_kernel(b); | |
962 | else if (b->machine && b->sockaddr.sa.sa_family != AF_UNSPEC) | |
963 | r = bus_container_connect_socket(b); | |
1e05d493 | 964 | else if (b->kernel) |
a7893c6b | 965 | r = bus_kernel_connect(b); |
1e05d493 | 966 | else if (b->sockaddr.sa.sa_family != AF_UNSPEC) |
a7893c6b | 967 | r = bus_socket_connect(b); |
1e05d493 LP |
968 | else |
969 | skipped = true; | |
970 | ||
971 | if (!skipped) { | |
972 | if (r >= 0) { | |
973 | r = attach_io_events(b); | |
974 | if (r >= 0) | |
975 | return r; | |
976 | } | |
6629161f | 977 | |
2fd9ae2e LP |
978 | b->last_connect_error = -r; |
979 | } | |
980 | ||
981 | r = bus_parse_next_address(b); | |
982 | if (r < 0) | |
983 | return r; | |
984 | if (r == 0) | |
985 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
986 | } |
987 | } | |
988 | ||
a7e3212d LP |
989 | int bus_next_address(sd_bus *b) { |
990 | assert(b); | |
991 | ||
992 | bus_reset_parsed_address(b); | |
993 | return bus_start_address(b); | |
994 | } | |
995 | ||
021a1e78 | 996 | static int bus_start_fd(sd_bus *b) { |
6629161f | 997 | struct stat st; |
021a1e78 LP |
998 | int r; |
999 | ||
1000 | assert(b); | |
e82c9509 LP |
1001 | assert(b->input_fd >= 0); |
1002 | assert(b->output_fd >= 0); | |
021a1e78 | 1003 | |
e82c9509 | 1004 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
1005 | if (r < 0) |
1006 | return r; | |
1007 | ||
e82c9509 | 1008 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
1009 | if (r < 0) |
1010 | return r; | |
1011 | ||
e82c9509 LP |
1012 | if (b->input_fd != b->output_fd) { |
1013 | r = fd_nonblock(b->output_fd, true); | |
1014 | if (r < 0) | |
1015 | return r; | |
1016 | ||
1017 | r = fd_cloexec(b->output_fd, true); | |
1018 | if (r < 0) | |
1019 | return r; | |
1020 | } | |
1021 | ||
6629161f LP |
1022 | if (fstat(b->input_fd, &st) < 0) |
1023 | return -errno; | |
1024 | ||
1025 | if (S_ISCHR(b->input_fd)) | |
1026 | return bus_kernel_take_fd(b); | |
1027 | else | |
1028 | return bus_socket_take_fd(b); | |
021a1e78 LP |
1029 | } |
1030 | ||
d9f644e2 | 1031 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1032 | int r; |
1033 | ||
d6888822 LP |
1034 | assert_return(bus, -EINVAL); |
1035 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
1036 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1037 | |
1038 | bus->state = BUS_OPENING; | |
1039 | ||
2181a7f5 LP |
1040 | if (bus->is_server && bus->bus_client) |
1041 | return -EINVAL; | |
1042 | ||
e82c9509 | 1043 | if (bus->input_fd >= 0) |
021a1e78 | 1044 | r = bus_start_fd(bus); |
a7893c6b | 1045 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 1046 | r = bus_start_address(bus); |
021a1e78 LP |
1047 | else |
1048 | return -EINVAL; | |
1049 | ||
1050 | if (r < 0) | |
1051 | return r; | |
1052 | ||
1053 | return bus_send_hello(bus); | |
1054 | } | |
1055 | ||
af08d2f9 LP |
1056 | _public_ int sd_bus_open(sd_bus **ret) { |
1057 | const char *e; | |
1058 | sd_bus *b; | |
1059 | int r; | |
1060 | ||
1061 | assert_return(ret, -EINVAL); | |
1062 | ||
1063 | /* Let's connect to the starter bus if it is set, and | |
1064 | * otherwise to the bus that is appropropriate for the scope | |
1065 | * we are running in */ | |
1066 | ||
1067 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1068 | if (e) { | |
1069 | if (streq(e, "system")) | |
1070 | return sd_bus_open_system(ret); | |
1071 | else if (streq(e, "session") || streq(e, "user")) | |
1072 | return sd_bus_open_user(ret); | |
1073 | } | |
1074 | ||
1075 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1076 | if (!e) { | |
1077 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
1078 | return sd_bus_open_user(ret); | |
1079 | else | |
1080 | return sd_bus_open_system(ret); | |
1081 | } | |
1082 | ||
1083 | r = sd_bus_new(&b); | |
1084 | if (r < 0) | |
1085 | return r; | |
1086 | ||
1087 | r = sd_bus_set_address(b, e); | |
1088 | if (r < 0) | |
1089 | goto fail; | |
1090 | ||
1091 | b->bus_client = true; | |
1092 | ||
1093 | /* We don't know whether the bus is trusted or not, so better | |
1094 | * be safe, and authenticate everything */ | |
1095 | b->trusted = false; | |
1096 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
1097 | ||
1098 | r = sd_bus_start(b); | |
1099 | if (r < 0) | |
1100 | goto fail; | |
1101 | ||
1102 | *ret = b; | |
1103 | return 0; | |
1104 | ||
1105 | fail: | |
1106 | bus_free(b); | |
1107 | return r; | |
1108 | } | |
1109 | ||
d9f644e2 | 1110 | _public_ int sd_bus_open_system(sd_bus **ret) { |
de1c301e LP |
1111 | const char *e; |
1112 | sd_bus *b; | |
1113 | int r; | |
1114 | ||
d6888822 | 1115 | assert_return(ret, -EINVAL); |
de1c301e | 1116 | |
021a1e78 LP |
1117 | r = sd_bus_new(&b); |
1118 | if (r < 0) | |
1119 | return r; | |
1120 | ||
6c03089c | 1121 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); |
e3dd987c | 1122 | if (e) |
021a1e78 | 1123 | r = sd_bus_set_address(b, e); |
e3dd987c | 1124 | else |
ab9001a1 | 1125 | r = sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_PATH); |
e3dd987c LP |
1126 | if (r < 0) |
1127 | goto fail; | |
de1c301e | 1128 | |
94bbf1ba | 1129 | b->bus_client = true; |
5972fe95 | 1130 | b->is_system = true; |
021a1e78 | 1131 | |
adacb957 LP |
1132 | /* Let's do per-method access control on the system bus. We |
1133 | * need the caller's UID and capability set for that. */ | |
1134 | b->trusted = false; | |
1135 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
1136 | ||
021a1e78 LP |
1137 | r = sd_bus_start(b); |
1138 | if (r < 0) | |
1139 | goto fail; | |
de1c301e LP |
1140 | |
1141 | *ret = b; | |
1142 | return 0; | |
021a1e78 LP |
1143 | |
1144 | fail: | |
1145 | bus_free(b); | |
1146 | return r; | |
de1c301e LP |
1147 | } |
1148 | ||
d9f644e2 | 1149 | _public_ int sd_bus_open_user(sd_bus **ret) { |
de1c301e LP |
1150 | const char *e; |
1151 | sd_bus *b; | |
de1c301e LP |
1152 | int r; |
1153 | ||
d6888822 | 1154 | assert_return(ret, -EINVAL); |
de1c301e | 1155 | |
021a1e78 LP |
1156 | r = sd_bus_new(&b); |
1157 | if (r < 0) | |
1158 | return r; | |
1159 | ||
6c03089c | 1160 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
de1c301e | 1161 | if (e) { |
021a1e78 | 1162 | r = sd_bus_set_address(b, e); |
de1c301e | 1163 | if (r < 0) |
021a1e78 | 1164 | goto fail; |
89ffcd2a | 1165 | } else { |
6c03089c | 1166 | e = secure_getenv("XDG_RUNTIME_DIR"); |
e3dd987c LP |
1167 | if (e) { |
1168 | _cleanup_free_ char *ee = NULL; | |
1169 | ||
1170 | ee = bus_address_escape(e); | |
1171 | if (!ee) { | |
626851be | 1172 | r = -ENOMEM; |
e3dd987c LP |
1173 | goto fail; |
1174 | } | |
1175 | ||
626851be | 1176 | #ifdef ENABLE_KDBUS |
ab9001a1 | 1177 | asprintf(&b->address, KERNEL_USER_BUS_FMT ";" UNIX_USER_BUS_FMT, (unsigned long) getuid(), ee); |
626851be | 1178 | #else |
2047a15a | 1179 | asprintf(&b->address, UNIX_USER_BUS_FMT, ee); |
626851be LP |
1180 | #endif |
1181 | } else { | |
1182 | #ifdef ENABLE_KDBUS | |
ab9001a1 | 1183 | asprintf(&b->address, KERNEL_USER_BUS_FMT, (unsigned long) getuid()); |
626851be LP |
1184 | #else |
1185 | return -ECONNREFUSED; | |
1186 | #endif | |
1187 | } | |
de1c301e | 1188 | |
e3dd987c LP |
1189 | if (!b->address) { |
1190 | r = -ENOMEM; | |
021a1e78 LP |
1191 | goto fail; |
1192 | } | |
de1c301e LP |
1193 | } |
1194 | ||
94bbf1ba | 1195 | b->bus_client = true; |
5972fe95 | 1196 | b->is_user = true; |
de1c301e | 1197 | |
adacb957 LP |
1198 | /* We don't do any per-method access control on the user |
1199 | * bus. */ | |
1200 | b->trusted = true; | |
1201 | ||
021a1e78 | 1202 | r = sd_bus_start(b); |
2571ead1 LP |
1203 | if (r < 0) |
1204 | goto fail; | |
de1c301e LP |
1205 | |
1206 | *ret = b; | |
1207 | return 0; | |
2571ead1 LP |
1208 | |
1209 | fail: | |
021a1e78 | 1210 | bus_free(b); |
2571ead1 | 1211 | return r; |
de1c301e LP |
1212 | } |
1213 | ||
d9f644e2 | 1214 | _public_ int sd_bus_open_system_remote(const char *host, sd_bus **ret) { |
0f8bd8de LP |
1215 | _cleanup_free_ char *e = NULL; |
1216 | char *p = NULL; | |
1217 | sd_bus *bus; | |
1218 | int r; | |
1219 | ||
1220 | assert_return(host, -EINVAL); | |
1221 | assert_return(ret, -EINVAL); | |
1222 | ||
1223 | e = bus_address_escape(host); | |
1224 | if (!e) | |
1225 | return -ENOMEM; | |
1226 | ||
1227 | p = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", NULL); | |
1228 | if (!p) | |
1229 | return -ENOMEM; | |
a7893c6b LP |
1230 | |
1231 | r = sd_bus_new(&bus); | |
1232 | if (r < 0) { | |
1233 | free(p); | |
1234 | return r; | |
1235 | } | |
1236 | ||
1237 | bus->address = p; | |
1238 | bus->bus_client = true; | |
1239 | ||
1240 | r = sd_bus_start(bus); | |
1241 | if (r < 0) { | |
1242 | bus_free(bus); | |
1243 | return r; | |
1244 | } | |
1245 | ||
1246 | *ret = bus; | |
1247 | return 0; | |
1248 | } | |
1249 | ||
d9f644e2 | 1250 | _public_ int sd_bus_open_system_container(const char *machine, sd_bus **ret) { |
a7893c6b LP |
1251 | _cleanup_free_ char *e = NULL; |
1252 | sd_bus *bus; | |
1253 | char *p; | |
1254 | int r; | |
1255 | ||
1256 | assert_return(machine, -EINVAL); | |
1257 | assert_return(ret, -EINVAL); | |
9e554864 | 1258 | assert_return(filename_is_safe(machine), -EINVAL); |
a7893c6b LP |
1259 | |
1260 | e = bus_address_escape(machine); | |
1261 | if (!e) | |
1262 | return -ENOMEM; | |
1263 | ||
9e554864 | 1264 | #ifdef ENABLE_KDBUS |
bc9fd78c | 1265 | p = strjoin("x-container-kernel:machine=", e, ";x-container-unix:machine=", e, NULL); |
9e554864 | 1266 | #else |
bc9fd78c | 1267 | p = strjoin("x-container-unix:machine=", e, NULL); |
9e554864 | 1268 | #endif |
a7893c6b LP |
1269 | if (!p) |
1270 | return -ENOMEM; | |
0f8bd8de LP |
1271 | |
1272 | r = sd_bus_new(&bus); | |
1273 | if (r < 0) { | |
1274 | free(p); | |
1275 | return r; | |
1276 | } | |
1277 | ||
1278 | bus->address = p; | |
1279 | bus->bus_client = true; | |
1280 | ||
1281 | r = sd_bus_start(bus); | |
1282 | if (r < 0) { | |
1283 | bus_free(bus); | |
1284 | return r; | |
1285 | } | |
1286 | ||
1287 | *ret = bus; | |
1288 | return 0; | |
1289 | } | |
1290 | ||
d9f644e2 | 1291 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1292 | |
de1c301e LP |
1293 | if (!bus) |
1294 | return; | |
d5a2b9a6 LP |
1295 | if (bus->state == BUS_CLOSED) |
1296 | return; | |
1297 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1298 | return; |
1299 | ||
1300 | bus->state = BUS_CLOSED; | |
e82c9509 | 1301 | |
40ca29a1 LP |
1302 | sd_bus_detach_event(bus); |
1303 | ||
0e586eae LP |
1304 | /* Drop all queued messages so that they drop references to |
1305 | * the bus object and the bus may be freed */ | |
1306 | bus_reset_queues(bus); | |
1307 | ||
f54514f3 LP |
1308 | if (!bus->is_kernel) |
1309 | bus_close_fds(bus); | |
1310 | ||
1311 | /* We'll leave the fd open in case this is a kernel bus, since | |
1312 | * there might still be memblocks around that reference this | |
cd6d5e1c | 1313 | * bus, and they might need to invoke the KDBUS_CMD_FREE |
1d0e3c98 | 1314 | * ioctl on the fd when they are freed. */ |
de1c301e LP |
1315 | } |
1316 | ||
718db961 LP |
1317 | static void bus_enter_closing(sd_bus *bus) { |
1318 | assert(bus); | |
1319 | ||
1320 | if (bus->state != BUS_OPENING && | |
1321 | bus->state != BUS_AUTHENTICATING && | |
1322 | bus->state != BUS_HELLO && | |
1323 | bus->state != BUS_RUNNING) | |
1324 | return; | |
1325 | ||
1326 | bus->state = BUS_CLOSING; | |
1327 | } | |
1328 | ||
d9f644e2 | 1329 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
9d6c7c82 | 1330 | assert_return(bus, NULL); |
de1c301e | 1331 | |
e4ee6e5c | 1332 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1333 | |
de1c301e LP |
1334 | return bus; |
1335 | } | |
1336 | ||
d9f644e2 | 1337 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1338 | unsigned i; |
5b1bc83f LP |
1339 | |
1340 | if (!bus) | |
1341 | return NULL; | |
de1c301e | 1342 | |
f389bf15 LP |
1343 | if (REFCNT_GET(bus->n_ref) == bus->rqueue_size + bus->wqueue_size + 1) { |
1344 | bool q = true; | |
b7fc42e0 | 1345 | |
f389bf15 LP |
1346 | for (i = 0; i < bus->rqueue_size; i++) |
1347 | if (bus->rqueue[i]->n_ref > 1) { | |
1348 | q = false; | |
1349 | break; | |
1350 | } | |
b7fc42e0 | 1351 | |
f389bf15 LP |
1352 | if (q) { |
1353 | for (i = 0; i < bus->wqueue_size; i++) | |
1354 | if (bus->wqueue[i]->n_ref > 1) { | |
1355 | q = false; | |
1356 | break; | |
1357 | } | |
1358 | } | |
b7fc42e0 | 1359 | |
f389bf15 LP |
1360 | /* We are the only holders on the messages, and the |
1361 | * messages are the only holders on us, so let's drop | |
1362 | * the messages and thus implicitly also kill our own | |
1363 | * last references */ | |
1364 | ||
1365 | bus_reset_queues(bus); | |
1366 | } | |
de1c301e | 1367 | |
f389bf15 LP |
1368 | i = REFCNT_DEC(bus->n_ref); |
1369 | if (i > 0) | |
1370 | return NULL; | |
1371 | ||
1372 | bus_free(bus); | |
de1c301e LP |
1373 | return NULL; |
1374 | } | |
1375 | ||
d9f644e2 | 1376 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1377 | |
1378 | assert_return(bus, -EINVAL); | |
1379 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1380 | |
f54514f3 | 1381 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1382 | } |
1383 | ||
d9f644e2 | 1384 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1385 | int r; |
1386 | ||
d6888822 LP |
1387 | assert_return(bus, -EINVAL); |
1388 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1389 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1390 | |
d728d708 | 1391 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1392 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1393 | return 0; |
1394 | ||
20902f3e | 1395 | r = bus_ensure_running(bus); |
d728d708 LP |
1396 | if (r < 0) |
1397 | return r; | |
de1c301e | 1398 | |
d728d708 LP |
1399 | return bus->can_fds; |
1400 | } | |
1401 | ||
1402 | return bus_type_is_valid(type); | |
de1c301e LP |
1403 | } |
1404 | ||
d9f644e2 | 1405 | _public_ int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) { |
d728d708 | 1406 | int r; |
de1c301e | 1407 | |
d6888822 LP |
1408 | assert_return(bus, -EINVAL); |
1409 | assert_return(server_id, -EINVAL); | |
1410 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1411 | |
20902f3e | 1412 | r = bus_ensure_running(bus); |
d728d708 LP |
1413 | if (r < 0) |
1414 | return r; | |
de1c301e | 1415 | |
98178d39 | 1416 | *server_id = bus->server_id; |
d728d708 | 1417 | return 0; |
de1c301e LP |
1418 | } |
1419 | ||
3df7a7e6 | 1420 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
7adc46fc | 1421 | assert(b); |
de1c301e LP |
1422 | assert(m); |
1423 | ||
aea93deb LP |
1424 | if (m->sealed) { |
1425 | /* If we copy the same message to multiple | |
693eb9a2 | 1426 | * destinations, avoid using the same cookie |
aea93deb | 1427 | * numbers. */ |
693eb9a2 | 1428 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1429 | return 0; |
aea93deb | 1430 | } |
de1c301e | 1431 | |
3df7a7e6 LP |
1432 | if (timeout == 0) |
1433 | timeout = BUS_DEFAULT_TIMEOUT; | |
1434 | ||
693eb9a2 | 1435 | return bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1436 | } |
1437 | ||
e1c433c6 LP |
1438 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
1439 | assert(b); | |
1440 | ||
1441 | /* Do packet version and endianess already match? */ | |
1442 | if ((b->message_version == 0 || b->message_version == (*m)->header->version) && | |
1443 | (b->message_endian == 0 || b->message_endian == (*m)->header->endian)) | |
1444 | return 0; | |
1445 | ||
1446 | /* No? Then remarshal! */ | |
1447 | return bus_message_remarshal(b, m); | |
1448 | } | |
1449 | ||
7adc46fc LP |
1450 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1451 | assert(b); | |
1452 | assert(m); | |
1453 | ||
7adc46fc LP |
1454 | /* The bus specification says the serial number cannot be 0, |
1455 | * hence let's fill something in for synthetic messages. Since | |
1456 | * synthetic messages might have a fake sender and we don't | |
1457 | * want to interfere with the real sender's serial numbers we | |
1458 | * pick a fixed, artifical one. We use (uint32_t) -1 rather | |
1459 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, | |
1460 | * even though kdbus can do 64bit. */ | |
1461 | ||
3df7a7e6 | 1462 | return bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1463 | } |
1464 | ||
069f5e61 | 1465 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call, size_t *idx) { |
2e3db52d LP |
1466 | int r; |
1467 | ||
718db961 | 1468 | assert(bus); |
2e3db52d | 1469 | assert(m); |
718db961 LP |
1470 | |
1471 | if (bus->is_kernel) | |
069f5e61 | 1472 | r = bus_kernel_write_message(bus, m, hint_sync_call); |
718db961 | 1473 | else |
2e3db52d LP |
1474 | r = bus_socket_write_message(bus, m, idx); |
1475 | ||
1476 | if (r <= 0) | |
1477 | return r; | |
1478 | ||
90911bb6 | 1479 | if (bus->is_kernel || *idx >= BUS_MESSAGE_SIZE(m)) |
693eb9a2 | 1480 | log_debug("Sent message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%lu reply_cookie=%lu error=%s", |
2e3db52d LP |
1481 | bus_message_type_to_string(m->header->type), |
1482 | strna(sd_bus_message_get_sender(m)), | |
1483 | strna(sd_bus_message_get_destination(m)), | |
1484 | strna(sd_bus_message_get_path(m)), | |
1485 | strna(sd_bus_message_get_interface(m)), | |
1486 | strna(sd_bus_message_get_member(m)), | |
693eb9a2 LP |
1487 | (unsigned long) BUS_MESSAGE_COOKIE(m), |
1488 | (unsigned long) m->reply_cookie, | |
2e3db52d LP |
1489 | strna(m->error.message)); |
1490 | ||
1491 | return r; | |
718db961 LP |
1492 | } |
1493 | ||
de1c301e | 1494 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1495 | int r, ret = 0; |
de1c301e LP |
1496 | |
1497 | assert(bus); | |
89ffcd2a | 1498 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1499 | |
de1c301e LP |
1500 | while (bus->wqueue_size > 0) { |
1501 | ||
069f5e61 | 1502 | r = bus_write_message(bus, bus->wqueue[0], false, &bus->windex); |
718db961 | 1503 | if (r < 0) |
de1c301e | 1504 | return r; |
718db961 | 1505 | else if (r == 0) |
e3017af9 LP |
1506 | /* Didn't do anything this time */ |
1507 | return ret; | |
6629161f | 1508 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1509 | /* Fully written. Let's drop the entry from |
1510 | * the queue. | |
1511 | * | |
1512 | * This isn't particularly optimized, but | |
1513 | * well, this is supposed to be our worst-case | |
1514 | * buffer only, and the socket buffer is | |
1515 | * supposed to be our primary buffer, and if | |
1516 | * it got full, then all bets are off | |
1517 | * anyway. */ | |
1518 | ||
de1c301e | 1519 | bus->wqueue_size --; |
c4e6e242 | 1520 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1521 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1522 | bus->windex = 0; | |
1523 | ||
e3017af9 | 1524 | ret = 1; |
de1c301e LP |
1525 | } |
1526 | } | |
1527 | ||
e3017af9 | 1528 | return ret; |
de1c301e LP |
1529 | } |
1530 | ||
766c5809 | 1531 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1532 | assert(bus); |
1533 | ||
1534 | if (bus->is_kernel) | |
766c5809 | 1535 | return bus_kernel_read_message(bus, hint_priority, priority); |
7d22c717 LP |
1536 | else |
1537 | return bus_socket_read_message(bus); | |
1538 | } | |
1539 | ||
7adc46fc | 1540 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1541 | assert(bus); |
7d22c717 | 1542 | |
821e0756 | 1543 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1544 | return -ENOBUFS; |
1545 | ||
821e0756 | 1546 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1547 | return -ENOMEM; |
1548 | ||
7d22c717 LP |
1549 | return 0; |
1550 | } | |
1551 | ||
766c5809 | 1552 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1553 | int r, ret = 0; |
de1c301e LP |
1554 | |
1555 | assert(bus); | |
1556 | assert(m); | |
89ffcd2a | 1557 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1558 | |
766c5809 LP |
1559 | /* Note that the priority logic is only available on kdbus, |
1560 | * where the rqueue is unused. We check the rqueue here | |
1561 | * anyway, because it's simple... */ | |
1562 | ||
7d22c717 LP |
1563 | for (;;) { |
1564 | if (bus->rqueue_size > 0) { | |
1565 | /* Dispatch a queued message */ | |
de1c301e | 1566 | |
7d22c717 LP |
1567 | *m = bus->rqueue[0]; |
1568 | bus->rqueue_size --; | |
1569 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1570 | return 1; | |
1571 | } | |
de1c301e | 1572 | |
7d22c717 | 1573 | /* Try to read a new message */ |
766c5809 | 1574 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1575 | if (r < 0) |
e3017af9 | 1576 | return r; |
e3017af9 LP |
1577 | if (r == 0) |
1578 | return ret; | |
de1c301e | 1579 | |
2e8d788c | 1580 | ret = 1; |
7d22c717 | 1581 | } |
de1c301e LP |
1582 | } |
1583 | ||
069f5e61 | 1584 | static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, bool hint_sync_call) { |
e1c433c6 | 1585 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1586 | int r; |
1587 | ||
d6888822 LP |
1588 | assert_return(bus, -EINVAL); |
1589 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1590 | assert_return(m, -EINVAL); | |
1591 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1592 | |
1593 | if (m->n_fds > 0) { | |
1594 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1595 | if (r < 0) | |
1596 | return r; | |
1597 | if (r == 0) | |
1598 | return -ENOTSUP; | |
1599 | } | |
de1c301e | 1600 | |
693eb9a2 | 1601 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1602 | * is expected */ |
693eb9a2 | 1603 | if (!cookie && !m->sealed) |
0461f8cd | 1604 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1605 | |
3df7a7e6 | 1606 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1607 | if (r < 0) |
1608 | return r; | |
1609 | ||
441d56a1 | 1610 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1611 | * message and place a replacement in m */ |
1612 | r = bus_remarshal_message(bus, &m); | |
1613 | if (r < 0) | |
1614 | return r; | |
1615 | ||
5407f2de LP |
1616 | /* If this is a reply and no reply was requested, then let's |
1617 | * suppress this, if we can */ | |
693eb9a2 | 1618 | if (m->dont_send && !cookie) |
7a37d625 | 1619 | return 1; |
5407f2de | 1620 | |
89ffcd2a | 1621 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1622 | size_t idx = 0; |
1623 | ||
069f5e61 | 1624 | r = bus_write_message(bus, m, hint_sync_call, &idx); |
32f46480 | 1625 | if (r < 0) { |
441d56a1 | 1626 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1627 | bus_enter_closing(bus); |
441d56a1 LP |
1628 | return -ECONNRESET; |
1629 | } | |
32f46480 | 1630 | |
de1c301e | 1631 | return r; |
32f46480 | 1632 | } else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1633 | /* Wasn't fully written. So let's remember how |
1634 | * much was written. Note that the first entry | |
1635 | * of the wqueue array is always allocated so | |
1636 | * that we always can remember how much was | |
1637 | * written. */ | |
1638 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1639 | bus->wqueue_size = 1; | |
1640 | bus->windex = idx; | |
1641 | } | |
1642 | } else { | |
de1c301e LP |
1643 | /* Just append it to the queue. */ |
1644 | ||
25220239 | 1645 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1646 | return -ENOBUFS; |
1647 | ||
821e0756 | 1648 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1649 | return -ENOMEM; |
1650 | ||
821e0756 | 1651 | bus->wqueue[bus->wqueue_size ++] = sd_bus_message_ref(m); |
de1c301e LP |
1652 | } |
1653 | ||
693eb9a2 LP |
1654 | if (cookie) |
1655 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1656 | |
7a37d625 | 1657 | return 1; |
de1c301e LP |
1658 | } |
1659 | ||
069f5e61 LP |
1660 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *cookie) { |
1661 | return bus_send_internal(bus, m, cookie, false); | |
1662 | } | |
1663 | ||
693eb9a2 | 1664 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1665 | int r; |
1666 | ||
1667 | assert_return(bus, -EINVAL); | |
1668 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1669 | assert_return(m, -EINVAL); | |
1670 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
1671 | ||
1672 | if (!streq_ptr(m->destination, destination)) { | |
1673 | ||
1674 | if (!destination) | |
1675 | return -EEXIST; | |
1676 | ||
1677 | r = sd_bus_message_set_destination(m, destination); | |
1678 | if (r < 0) | |
1679 | return r; | |
1680 | } | |
1681 | ||
693eb9a2 | 1682 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1683 | } |
1684 | ||
de1c301e LP |
1685 | static usec_t calc_elapse(uint64_t usec) { |
1686 | if (usec == (uint64_t) -1) | |
1687 | return 0; | |
1688 | ||
de1c301e LP |
1689 | return now(CLOCK_MONOTONIC) + usec; |
1690 | } | |
1691 | ||
e3017af9 LP |
1692 | static int timeout_compare(const void *a, const void *b) { |
1693 | const struct reply_callback *x = a, *y = b; | |
1694 | ||
1695 | if (x->timeout != 0 && y->timeout == 0) | |
1696 | return -1; | |
1697 | ||
1698 | if (x->timeout == 0 && y->timeout != 0) | |
1699 | return 1; | |
1700 | ||
1701 | if (x->timeout < y->timeout) | |
1702 | return -1; | |
1703 | ||
1704 | if (x->timeout > y->timeout) | |
1705 | return 1; | |
1706 | ||
1707 | return 0; | |
1708 | } | |
1709 | ||
c49b30a2 | 1710 | _public_ int sd_bus_call_async( |
de1c301e | 1711 | sd_bus *bus, |
e1c433c6 | 1712 | sd_bus_message *_m, |
52f3ba91 | 1713 | sd_bus_message_handler_t callback, |
de1c301e LP |
1714 | void *userdata, |
1715 | uint64_t usec, | |
693eb9a2 | 1716 | uint64_t *cookie) { |
de1c301e | 1717 | |
e1c433c6 | 1718 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1719 | struct reply_callback *c; |
1720 | int r; | |
1721 | ||
d6888822 LP |
1722 | assert_return(bus, -EINVAL); |
1723 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1724 | assert_return(m, -EINVAL); | |
40ca29a1 | 1725 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1726 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 LP |
1727 | assert_return(callback, -EINVAL); |
1728 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a LP |
1729 | |
1730 | r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func); | |
1731 | if (r < 0) | |
1732 | return r; | |
de1c301e | 1733 | |
3df7a7e6 LP |
1734 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1735 | if (r < 0) | |
1736 | return r; | |
e3017af9 | 1737 | |
3df7a7e6 | 1738 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
1739 | if (r < 0) |
1740 | return r; | |
1741 | ||
e1c433c6 LP |
1742 | r = bus_remarshal_message(bus, &m); |
1743 | if (r < 0) | |
1744 | return r; | |
1745 | ||
eba8617e | 1746 | c = new0(struct reply_callback, 1); |
de1c301e LP |
1747 | if (!c) |
1748 | return -ENOMEM; | |
1749 | ||
1750 | c->callback = callback; | |
1751 | c->userdata = userdata; | |
693eb9a2 | 1752 | c->cookie = BUS_MESSAGE_COOKIE(m); |
3df7a7e6 | 1753 | c->timeout = calc_elapse(m->timeout); |
de1c301e | 1754 | |
693eb9a2 | 1755 | r = hashmap_put(bus->reply_callbacks, &c->cookie, c); |
de1c301e LP |
1756 | if (r < 0) { |
1757 | free(c); | |
1758 | return r; | |
1759 | } | |
1760 | ||
e3017af9 LP |
1761 | if (c->timeout != 0) { |
1762 | r = prioq_put(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1763 | if (r < 0) { | |
1764 | c->timeout = 0; | |
693eb9a2 | 1765 | sd_bus_call_async_cancel(bus, c->cookie); |
e3017af9 LP |
1766 | return r; |
1767 | } | |
1768 | } | |
1769 | ||
693eb9a2 | 1770 | r = sd_bus_send(bus, m, cookie); |
de1c301e | 1771 | if (r < 0) { |
693eb9a2 | 1772 | sd_bus_call_async_cancel(bus, c->cookie); |
de1c301e LP |
1773 | return r; |
1774 | } | |
1775 | ||
1776 | return r; | |
1777 | } | |
1778 | ||
693eb9a2 | 1779 | _public_ int sd_bus_call_async_cancel(sd_bus *bus, uint64_t cookie) { |
e3017af9 | 1780 | struct reply_callback *c; |
de1c301e | 1781 | |
d6888822 | 1782 | assert_return(bus, -EINVAL); |
693eb9a2 | 1783 | assert_return(cookie != 0, -EINVAL); |
d6888822 | 1784 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1785 | |
693eb9a2 | 1786 | c = hashmap_remove(bus->reply_callbacks, &cookie); |
de1c301e LP |
1787 | if (!c) |
1788 | return 0; | |
1789 | ||
e3017af9 LP |
1790 | if (c->timeout != 0) |
1791 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1792 | ||
de1c301e LP |
1793 | free(c); |
1794 | return 1; | |
1795 | } | |
1796 | ||
20902f3e | 1797 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1798 | int r; |
1799 | ||
1800 | assert(bus); | |
1801 | ||
718db961 | 1802 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING) |
021a1e78 | 1803 | return -ENOTCONN; |
d728d708 LP |
1804 | if (bus->state == BUS_RUNNING) |
1805 | return 1; | |
89ffcd2a LP |
1806 | |
1807 | for (;;) { | |
1808 | r = sd_bus_process(bus, NULL); | |
1809 | if (r < 0) | |
1810 | return r; | |
d728d708 LP |
1811 | if (bus->state == BUS_RUNNING) |
1812 | return 1; | |
e3017af9 LP |
1813 | if (r > 0) |
1814 | continue; | |
89ffcd2a LP |
1815 | |
1816 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1817 | if (r < 0) | |
1818 | return r; | |
1819 | } | |
1820 | } | |
1821 | ||
97f82db3 | 1822 | _public_ int sd_bus_call( |
de1c301e | 1823 | sd_bus *bus, |
97f82db3 | 1824 | sd_bus_message *_m, |
de1c301e LP |
1825 | uint64_t usec, |
1826 | sd_bus_error *error, | |
1827 | sd_bus_message **reply) { | |
1828 | ||
97f82db3 | 1829 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 1830 | usec_t timeout; |
693eb9a2 | 1831 | uint64_t cookie; |
7d22c717 LP |
1832 | unsigned i; |
1833 | int r; | |
de1c301e | 1834 | |
97f82db3 KS |
1835 | assert_return(bus, -EINVAL); |
1836 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1837 | assert_return(m, -EINVAL); | |
1838 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); | |
1839 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); | |
1840 | assert_return(!bus_error_is_dirty(error), -EINVAL); | |
1841 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
1842 | ||
1843 | r = bus_ensure_running(bus); | |
1844 | if (r < 0) | |
1845 | return r; | |
1846 | ||
a43b9ca3 | 1847 | i = bus->rqueue_size; |
97f82db3 KS |
1848 | |
1849 | r = bus_seal_message(bus, m, usec); | |
1850 | if (r < 0) | |
1851 | return r; | |
1852 | ||
1853 | r = bus_remarshal_message(bus, &m); | |
1854 | if (r < 0) | |
1855 | return r; | |
1856 | ||
069f5e61 | 1857 | r = bus_send_internal(bus, m, &cookie, true); |
de1c301e LP |
1858 | if (r < 0) |
1859 | return r; | |
1860 | ||
3df7a7e6 | 1861 | timeout = calc_elapse(m->timeout); |
de1c301e LP |
1862 | |
1863 | for (;;) { | |
1864 | usec_t left; | |
de1c301e | 1865 | |
7d22c717 LP |
1866 | while (i < bus->rqueue_size) { |
1867 | sd_bus_message *incoming = NULL; | |
1868 | ||
1869 | incoming = bus->rqueue[i]; | |
89ffcd2a | 1870 | |
693eb9a2 | 1871 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
1872 | /* Found a match! */ |
1873 | ||
7d22c717 LP |
1874 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1875 | bus->rqueue_size--; | |
1876 | ||
40ca29a1 | 1877 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 LP |
1878 | |
1879 | if (reply) | |
1880 | *reply = incoming; | |
1881 | else | |
1882 | sd_bus_message_unref(incoming); | |
1883 | ||
7a37d625 | 1884 | return 1; |
a43b9ca3 | 1885 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) |
de1c301e | 1886 | r = sd_bus_error_copy(error, &incoming->error); |
a43b9ca3 LP |
1887 | else |
1888 | r = -EIO; | |
de1c301e LP |
1889 | |
1890 | sd_bus_message_unref(incoming); | |
a43b9ca3 | 1891 | return r; |
a8a07f89 | 1892 | |
693eb9a2 | 1893 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
1894 | bus->unique_name && |
1895 | incoming->sender && | |
1896 | streq(bus->unique_name, incoming->sender)) { | |
1897 | ||
7d22c717 LP |
1898 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1899 | bus->rqueue_size--; | |
1900 | ||
a8a07f89 LP |
1901 | /* Our own message? Somebody is trying |
1902 | * to send its own client a message, | |
1903 | * let's not dead-lock, let's fail | |
1904 | * immediately. */ | |
1905 | ||
1906 | sd_bus_message_unref(incoming); | |
1907 | return -ELOOP; | |
de1c301e LP |
1908 | } |
1909 | ||
de1c301e | 1910 | /* Try to read more, right-away */ |
7d22c717 | 1911 | i++; |
de1c301e | 1912 | } |
7d22c717 | 1913 | |
766c5809 | 1914 | r = bus_read_message(bus, false, 0); |
32f46480 | 1915 | if (r < 0) { |
441d56a1 | 1916 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1917 | bus_enter_closing(bus); |
441d56a1 LP |
1918 | return -ECONNRESET; |
1919 | } | |
32f46480 | 1920 | |
a43b9ca3 | 1921 | return r; |
32f46480 | 1922 | } |
7d22c717 | 1923 | if (r > 0) |
e3017af9 | 1924 | continue; |
de1c301e LP |
1925 | |
1926 | if (timeout > 0) { | |
1927 | usec_t n; | |
1928 | ||
1929 | n = now(CLOCK_MONOTONIC); | |
1930 | if (n >= timeout) | |
1931 | return -ETIMEDOUT; | |
1932 | ||
1933 | left = timeout - n; | |
1934 | } else | |
1935 | left = (uint64_t) -1; | |
1936 | ||
e3017af9 | 1937 | r = bus_poll(bus, true, left); |
de1c301e LP |
1938 | if (r < 0) |
1939 | return r; | |
f8e11cda LP |
1940 | if (r == 0) |
1941 | return -ETIMEDOUT; | |
de1c301e LP |
1942 | |
1943 | r = dispatch_wqueue(bus); | |
32f46480 | 1944 | if (r < 0) { |
441d56a1 | 1945 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1946 | bus_enter_closing(bus); |
441d56a1 LP |
1947 | return -ECONNRESET; |
1948 | } | |
32f46480 | 1949 | |
de1c301e | 1950 | return r; |
32f46480 | 1951 | } |
de1c301e LP |
1952 | } |
1953 | } | |
1954 | ||
d9f644e2 | 1955 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
1956 | |
1957 | assert_return(bus, -EINVAL); | |
d6888822 LP |
1958 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
1959 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1960 | |
e82c9509 | 1961 | return bus->input_fd; |
de1c301e LP |
1962 | } |
1963 | ||
d9f644e2 | 1964 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
1965 | int flags = 0; |
1966 | ||
d6888822 | 1967 | assert_return(bus, -EINVAL); |
718db961 | 1968 | assert_return(BUS_IS_OPEN(bus->state) || bus->state == BUS_CLOSING, -ENOTCONN); |
d6888822 | 1969 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e LP |
1970 | |
1971 | if (bus->state == BUS_OPENING) | |
1972 | flags |= POLLOUT; | |
89ffcd2a LP |
1973 | else if (bus->state == BUS_AUTHENTICATING) { |
1974 | ||
2181a7f5 | 1975 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
1976 | flags |= POLLOUT; |
1977 | ||
1978 | flags |= POLLIN; | |
1979 | ||
1980 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
1981 | if (bus->rqueue_size <= 0) |
1982 | flags |= POLLIN; | |
1983 | if (bus->wqueue_size > 0) | |
1984 | flags |= POLLOUT; | |
1985 | } | |
1986 | ||
1987 | return flags; | |
1988 | } | |
1989 | ||
d9f644e2 | 1990 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
1991 | struct reply_callback *c; |
1992 | ||
d6888822 LP |
1993 | assert_return(bus, -EINVAL); |
1994 | assert_return(timeout_usec, -EINVAL); | |
718db961 | 1995 | assert_return(BUS_IS_OPEN(bus->state) || bus->state == BUS_CLOSING, -ENOTCONN); |
d6888822 | 1996 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 1997 | |
718db961 LP |
1998 | if (bus->state == BUS_CLOSING) { |
1999 | *timeout_usec = 0; | |
2000 | return 1; | |
2001 | } | |
2002 | ||
e3017af9 LP |
2003 | if (bus->state == BUS_AUTHENTICATING) { |
2004 | *timeout_usec = bus->auth_timeout; | |
2005 | return 1; | |
2006 | } | |
2007 | ||
adee69fa LP |
2008 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
2009 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2010 | return 0; |
adee69fa | 2011 | } |
e3017af9 | 2012 | |
8efd6381 LP |
2013 | if (bus->rqueue_size > 0) { |
2014 | *timeout_usec = 0; | |
2015 | return 1; | |
2016 | } | |
2017 | ||
e3017af9 | 2018 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
2019 | if (!c) { |
2020 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2021 | return 0; |
adee69fa | 2022 | } |
e3017af9 LP |
2023 | |
2024 | *timeout_usec = c->timeout; | |
2025 | return 1; | |
2026 | } | |
2027 | ||
2028 | static int process_timeout(sd_bus *bus) { | |
ebcf1f97 | 2029 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
eb01ba5d | 2030 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 LP |
2031 | struct reply_callback *c; |
2032 | usec_t n; | |
2033 | int r; | |
2034 | ||
2035 | assert(bus); | |
2036 | ||
2037 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2038 | if (!c) | |
2039 | return 0; | |
2040 | ||
2041 | n = now(CLOCK_MONOTONIC); | |
2042 | if (c->timeout > n) | |
2043 | return 0; | |
2044 | ||
eb01ba5d LP |
2045 | r = bus_message_new_synthetic_error( |
2046 | bus, | |
693eb9a2 | 2047 | c->cookie, |
14c24659 | 2048 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2049 | &m); |
2050 | if (r < 0) | |
2051 | return r; | |
2052 | ||
34a2c9e8 LP |
2053 | m->sender = "org.freedesktop.DBus"; |
2054 | ||
7adc46fc | 2055 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2056 | if (r < 0) |
2057 | return r; | |
2058 | ||
e3017af9 | 2059 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
693eb9a2 | 2060 | hashmap_remove(bus->reply_callbacks, &c->cookie); |
e3017af9 | 2061 | |
718db961 LP |
2062 | bus->current = m; |
2063 | bus->iteration_counter ++; | |
2064 | ||
ebcf1f97 LP |
2065 | r = c->callback(bus, m, c->userdata, &error_buffer); |
2066 | r = bus_maybe_reply_error(m, r, &error_buffer); | |
e3017af9 LP |
2067 | free(c); |
2068 | ||
718db961 LP |
2069 | bus->current = NULL; |
2070 | ||
ebcf1f97 | 2071 | return r; |
e3017af9 LP |
2072 | } |
2073 | ||
9d373862 LP |
2074 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2075 | assert(bus); | |
2076 | assert(m); | |
2077 | ||
2078 | if (bus->state != BUS_HELLO) | |
2079 | return 0; | |
2080 | ||
2081 | /* Let's make sure the first message on the bus is the HELLO | |
2082 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2083 | * here (we leave that to the usual handling), we just verify |
2084 | * we don't let any earlier msg through. */ | |
9d373862 | 2085 | |
40ca29a1 LP |
2086 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2087 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
2088 | return -EIO; |
2089 | ||
693eb9a2 | 2090 | if (m->reply_cookie != bus->hello_cookie) |
9d373862 LP |
2091 | return -EIO; |
2092 | ||
2093 | return 0; | |
2094 | } | |
2095 | ||
a652755d | 2096 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
ebcf1f97 | 2097 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2098 | struct reply_callback *c; |
2099 | int r; | |
2100 | ||
2101 | assert(bus); | |
2102 | assert(m); | |
2103 | ||
40ca29a1 LP |
2104 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2105 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
2106 | return 0; |
2107 | ||
693eb9a2 | 2108 | c = hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2109 | if (!c) |
2110 | return 0; | |
2111 | ||
2112 | if (c->timeout != 0) | |
2113 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2114 | ||
88fe224c LP |
2115 | r = sd_bus_message_rewind(m, true); |
2116 | if (r < 0) | |
2117 | return r; | |
2118 | ||
ebcf1f97 LP |
2119 | r = c->callback(bus, m, c->userdata, &error_buffer); |
2120 | r = bus_maybe_reply_error(m, r, &error_buffer); | |
a652755d LP |
2121 | free(c); |
2122 | ||
ebcf1f97 | 2123 | return r; |
a652755d LP |
2124 | } |
2125 | ||
2126 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
ebcf1f97 | 2127 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2128 | struct filter_callback *l; |
2129 | int r; | |
2130 | ||
392d5b37 LP |
2131 | assert(bus); |
2132 | assert(m); | |
2133 | ||
7286037f LP |
2134 | do { |
2135 | bus->filter_callbacks_modified = false; | |
2136 | ||
2137 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
2138 | ||
2139 | if (bus->filter_callbacks_modified) | |
2140 | break; | |
2141 | ||
2142 | /* Don't run this more than once per iteration */ | |
2143 | if (l->last_iteration == bus->iteration_counter) | |
2144 | continue; | |
2145 | ||
2146 | l->last_iteration = bus->iteration_counter; | |
2147 | ||
88fe224c LP |
2148 | r = sd_bus_message_rewind(m, true); |
2149 | if (r < 0) | |
2150 | return r; | |
2151 | ||
969987ea | 2152 | r = l->callback(bus, m, l->userdata, &error_buffer); |
ebcf1f97 | 2153 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2154 | if (r != 0) |
2155 | return r; | |
2156 | ||
2157 | } | |
2158 | ||
2159 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2160 | |
2161 | return 0; | |
2162 | } | |
2163 | ||
392d5b37 | 2164 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2165 | int r; |
2166 | ||
392d5b37 LP |
2167 | assert(bus); |
2168 | assert(m); | |
2169 | ||
7286037f LP |
2170 | do { |
2171 | bus->match_callbacks_modified = false; | |
2172 | ||
eb01ba5d | 2173 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2174 | if (r != 0) |
2175 | return r; | |
2176 | ||
2177 | } while (bus->match_callbacks_modified); | |
2178 | ||
2179 | return 0; | |
392d5b37 LP |
2180 | } |
2181 | ||
b9bf7e2b LP |
2182 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
2183 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
2184 | int r; | |
2185 | ||
2186 | assert(bus); | |
2187 | assert(m); | |
2188 | ||
758bf0c7 LP |
2189 | if (bus->manual_peer_interface) |
2190 | return 0; | |
2191 | ||
40ca29a1 | 2192 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2193 | return 0; |
2194 | ||
2195 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2196 | return 0; | |
2197 | ||
0461f8cd | 2198 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2199 | return 1; |
2200 | ||
2201 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2202 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2203 | else if (streq_ptr(m->member, "GetMachineId")) { |
2204 | sd_id128_t id; | |
2205 | char sid[33]; | |
2206 | ||
2207 | r = sd_id128_get_machine(&id); | |
2208 | if (r < 0) | |
2209 | return r; | |
2210 | ||
df2d202e | 2211 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2212 | if (r < 0) |
2213 | return r; | |
2214 | ||
2215 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2216 | } else { | |
29ddb38f | 2217 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2218 | m, &reply, |
40ca29a1 | 2219 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2220 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2221 | } |
2222 | ||
2223 | if (r < 0) | |
2224 | return r; | |
2225 | ||
2226 | r = sd_bus_send(bus, reply, NULL); | |
2227 | if (r < 0) | |
2228 | return r; | |
2229 | ||
2230 | return 1; | |
2231 | } | |
2232 | ||
992c052c | 2233 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2234 | int r; |
2235 | ||
2236 | assert(bus); | |
992c052c | 2237 | assert(m); |
e3017af9 | 2238 | |
affff0b6 | 2239 | bus->current = m; |
992c052c | 2240 | bus->iteration_counter++; |
e3017af9 | 2241 | |
693eb9a2 | 2242 | log_debug("Got message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%lu reply_cookie=%lu error=%s", |
4cdf0751 | 2243 | bus_message_type_to_string(m->header->type), |
40ca29a1 | 2244 | strna(sd_bus_message_get_sender(m)), |
4cdf0751 | 2245 | strna(sd_bus_message_get_destination(m)), |
40ca29a1 LP |
2246 | strna(sd_bus_message_get_path(m)), |
2247 | strna(sd_bus_message_get_interface(m)), | |
4cdf0751 | 2248 | strna(sd_bus_message_get_member(m)), |
693eb9a2 LP |
2249 | (unsigned long) BUS_MESSAGE_COOKIE(m), |
2250 | (unsigned long) m->reply_cookie, | |
4cdf0751 | 2251 | strna(m->error.message)); |
40ca29a1 | 2252 | |
992c052c LP |
2253 | r = process_hello(bus, m); |
2254 | if (r != 0) | |
affff0b6 | 2255 | goto finish; |
a652755d | 2256 | |
992c052c LP |
2257 | r = process_reply(bus, m); |
2258 | if (r != 0) | |
affff0b6 | 2259 | goto finish; |
e3017af9 | 2260 | |
992c052c LP |
2261 | r = process_filter(bus, m); |
2262 | if (r != 0) | |
affff0b6 | 2263 | goto finish; |
a652755d | 2264 | |
992c052c LP |
2265 | r = process_match(bus, m); |
2266 | if (r != 0) | |
affff0b6 | 2267 | goto finish; |
a652755d | 2268 | |
992c052c LP |
2269 | r = process_builtin(bus, m); |
2270 | if (r != 0) | |
affff0b6 LP |
2271 | goto finish; |
2272 | ||
2273 | r = bus_process_object(bus, m); | |
a652755d | 2274 | |
affff0b6 LP |
2275 | finish: |
2276 | bus->current = NULL; | |
2277 | return r; | |
29ddb38f | 2278 | } |
88fe224c | 2279 | |
766c5809 | 2280 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
992c052c | 2281 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
29ddb38f | 2282 | int r; |
a652755d | 2283 | |
29ddb38f | 2284 | assert(bus); |
992c052c | 2285 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2286 | |
992c052c LP |
2287 | r = process_timeout(bus); |
2288 | if (r != 0) | |
2289 | goto null_message; | |
7286037f | 2290 | |
992c052c LP |
2291 | r = dispatch_wqueue(bus); |
2292 | if (r != 0) | |
2293 | goto null_message; | |
7286037f | 2294 | |
766c5809 | 2295 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2296 | if (r < 0) |
2297 | return r; | |
2298 | if (!m) | |
2299 | goto null_message; | |
7286037f | 2300 | |
992c052c LP |
2301 | r = process_message(bus, m); |
2302 | if (r != 0) | |
2303 | goto null_message; | |
7286037f | 2304 | |
992c052c LP |
2305 | if (ret) { |
2306 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2307 | if (r < 0) |
2308 | return r; | |
e3017af9 | 2309 | |
992c052c LP |
2310 | *ret = m; |
2311 | m = NULL; | |
2312 | return 1; | |
2313 | } | |
a652755d | 2314 | |
40ca29a1 | 2315 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2316 | |
dc74ce9b LP |
2317 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2318 | strna(sd_bus_message_get_sender(m)), | |
2319 | strna(sd_bus_message_get_path(m)), | |
2320 | strna(sd_bus_message_get_interface(m)), | |
2321 | strna(sd_bus_message_get_member(m))); | |
2322 | ||
992c052c | 2323 | r = sd_bus_reply_method_errorf( |
df2d202e | 2324 | m, |
40ca29a1 | 2325 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2326 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2327 | if (r < 0) |
2328 | return r; | |
2329 | } | |
e3017af9 | 2330 | |
992c052c | 2331 | return 1; |
0a72c2bd | 2332 | |
992c052c LP |
2333 | null_message: |
2334 | if (r >= 0 && ret) | |
2335 | *ret = NULL; | |
0a72c2bd | 2336 | |
992c052c | 2337 | return r; |
29ddb38f | 2338 | } |
0a72c2bd | 2339 | |
718db961 LP |
2340 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2341 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2342 | struct reply_callback *c; | |
2343 | int r; | |
2344 | ||
2345 | assert(bus); | |
2346 | assert(bus->state == BUS_CLOSING); | |
2347 | ||
2348 | c = hashmap_first(bus->reply_callbacks); | |
2349 | if (c) { | |
ebcf1f97 LP |
2350 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
2351 | ||
718db961 LP |
2352 | /* First, fail all outstanding method calls */ |
2353 | r = bus_message_new_synthetic_error( | |
2354 | bus, | |
693eb9a2 | 2355 | c->cookie, |
14c24659 | 2356 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), |
718db961 LP |
2357 | &m); |
2358 | if (r < 0) | |
2359 | return r; | |
2360 | ||
7adc46fc | 2361 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2362 | if (r < 0) |
2363 | return r; | |
2364 | ||
2365 | if (c->timeout != 0) | |
2366 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2367 | ||
693eb9a2 | 2368 | hashmap_remove(bus->reply_callbacks, &c->cookie); |
718db961 LP |
2369 | |
2370 | bus->current = m; | |
2371 | bus->iteration_counter++; | |
2372 | ||
ebcf1f97 LP |
2373 | r = c->callback(bus, m, c->userdata, &error_buffer); |
2374 | r = bus_maybe_reply_error(m, r, &error_buffer); | |
718db961 LP |
2375 | free(c); |
2376 | ||
718db961 LP |
2377 | goto finish; |
2378 | } | |
2379 | ||
2380 | /* Then, synthesize a Disconnected message */ | |
2381 | r = sd_bus_message_new_signal( | |
2382 | bus, | |
2383 | "/org/freedesktop/DBus/Local", | |
2384 | "org.freedesktop.DBus.Local", | |
2385 | "Disconnected", | |
2386 | &m); | |
2387 | if (r < 0) | |
2388 | return r; | |
2389 | ||
34a2c9e8 LP |
2390 | m->sender = "org.freedesktop.DBus.Local"; |
2391 | ||
7adc46fc | 2392 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2393 | if (r < 0) |
2394 | return r; | |
2395 | ||
2396 | sd_bus_close(bus); | |
2397 | ||
2398 | bus->current = m; | |
2399 | bus->iteration_counter++; | |
2400 | ||
2401 | r = process_filter(bus, m); | |
2402 | if (r != 0) | |
2403 | goto finish; | |
2404 | ||
2405 | r = process_match(bus, m); | |
2406 | if (r != 0) | |
2407 | goto finish; | |
2408 | ||
2409 | if (ret) { | |
2410 | *ret = m; | |
2411 | m = NULL; | |
2412 | } | |
2413 | ||
2414 | r = 1; | |
2415 | ||
2416 | finish: | |
2417 | bus->current = NULL; | |
2418 | return r; | |
2419 | } | |
2420 | ||
766c5809 | 2421 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2422 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2423 | int r; |
0a72c2bd | 2424 | |
992c052c LP |
2425 | /* Returns 0 when we didn't do anything. This should cause the |
2426 | * caller to invoke sd_bus_wait() before returning the next | |
2427 | * time. Returns > 0 when we did something, which possibly | |
2428 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2429 | |
d6888822 LP |
2430 | assert_return(bus, -EINVAL); |
2431 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2432 | |
992c052c | 2433 | /* We don't allow recursively invoking sd_bus_process(). */ |
718db961 | 2434 | assert_return(!bus->current, -EBUSY); |
0a72c2bd | 2435 | |
992c052c | 2436 | switch (bus->state) { |
0a72c2bd | 2437 | |
992c052c | 2438 | case BUS_UNSET: |
992c052c | 2439 | return -ENOTCONN; |
0a72c2bd | 2440 | |
6d6f4904 LP |
2441 | case BUS_CLOSED: |
2442 | return -ECONNRESET; | |
2443 | ||
992c052c LP |
2444 | case BUS_OPENING: |
2445 | r = bus_socket_process_opening(bus); | |
441d56a1 | 2446 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2447 | bus_enter_closing(bus); |
2448 | r = 1; | |
2449 | } else if (r < 0) | |
29ddb38f | 2450 | return r; |
992c052c LP |
2451 | if (ret) |
2452 | *ret = NULL; | |
a652755d LP |
2453 | return r; |
2454 | ||
992c052c | 2455 | case BUS_AUTHENTICATING: |
992c052c | 2456 | r = bus_socket_process_authenticating(bus); |
441d56a1 | 2457 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2458 | bus_enter_closing(bus); |
2459 | r = 1; | |
2460 | } else if (r < 0) | |
29ddb38f | 2461 | return r; |
718db961 | 2462 | |
992c052c LP |
2463 | if (ret) |
2464 | *ret = NULL; | |
718db961 | 2465 | |
992c052c | 2466 | return r; |
a652755d | 2467 | |
992c052c LP |
2468 | case BUS_RUNNING: |
2469 | case BUS_HELLO: | |
766c5809 | 2470 | r = process_running(bus, hint_priority, priority, ret); |
441d56a1 | 2471 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2472 | bus_enter_closing(bus); |
2473 | r = 1; | |
2474 | ||
2475 | if (ret) | |
2476 | *ret = NULL; | |
2477 | } | |
43a43f50 | 2478 | |
43a43f50 | 2479 | return r; |
718db961 LP |
2480 | |
2481 | case BUS_CLOSING: | |
2482 | return process_closing(bus, ret); | |
992c052c | 2483 | } |
43a43f50 | 2484 | |
992c052c | 2485 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2486 | } |
2487 | ||
766c5809 LP |
2488 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2489 | return bus_process_internal(bus, false, 0, ret); | |
2490 | } | |
2491 | ||
2492 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2493 | return bus_process_internal(bus, true, priority, ret); | |
2494 | } | |
2495 | ||
992c052c LP |
2496 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2497 | struct pollfd p[2] = {}; | |
2498 | int r, e, n; | |
2499 | struct timespec ts; | |
8efd6381 | 2500 | usec_t m = (usec_t) -1; |
adcdb374 LP |
2501 | |
2502 | assert(bus); | |
718db961 LP |
2503 | |
2504 | if (bus->state == BUS_CLOSING) | |
2505 | return 1; | |
2506 | ||
d6888822 | 2507 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); |
adcdb374 | 2508 | |
992c052c LP |
2509 | e = sd_bus_get_events(bus); |
2510 | if (e < 0) | |
2511 | return e; | |
adcdb374 | 2512 | |
992c052c | 2513 | if (need_more) |
8efd6381 LP |
2514 | /* The caller really needs some more data, he doesn't |
2515 | * care about what's already read, or any timeouts | |
2516 | * except its own.*/ | |
992c052c | 2517 | e |= POLLIN; |
992c052c | 2518 | else { |
8efd6381 LP |
2519 | usec_t until; |
2520 | /* The caller wants to process if there's something to | |
2521 | * process, but doesn't care otherwise */ | |
2522 | ||
2523 | r = sd_bus_get_timeout(bus, &until); | |
2524 | if (r < 0) | |
2525 | return r; | |
2526 | if (r > 0) { | |
2527 | usec_t nw; | |
2528 | nw = now(CLOCK_MONOTONIC); | |
2529 | m = until > nw ? until - nw : 0; | |
2530 | } | |
992c052c | 2531 | } |
adcdb374 | 2532 | |
992c052c LP |
2533 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2534 | m = timeout_usec; | |
adcdb374 | 2535 | |
992c052c LP |
2536 | p[0].fd = bus->input_fd; |
2537 | if (bus->output_fd == bus->input_fd) { | |
2538 | p[0].events = e; | |
2539 | n = 1; | |
2540 | } else { | |
2541 | p[0].events = e & POLLIN; | |
2542 | p[1].fd = bus->output_fd; | |
2543 | p[1].events = e & POLLOUT; | |
2544 | n = 2; | |
adcdb374 LP |
2545 | } |
2546 | ||
992c052c | 2547 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2548 | if (r < 0) |
992c052c | 2549 | return -errno; |
adcdb374 | 2550 | |
992c052c | 2551 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2552 | } |
2553 | ||
d9f644e2 | 2554 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2555 | |
d6888822 | 2556 | assert_return(bus, -EINVAL); |
d6888822 | 2557 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2558 | |
718db961 LP |
2559 | if (bus->state == BUS_CLOSING) |
2560 | return 0; | |
2561 | ||
2562 | assert_return(BUS_IS_OPEN(bus->state) , -ENOTCONN); | |
2563 | ||
992c052c LP |
2564 | if (bus->rqueue_size > 0) |
2565 | return 0; | |
9db76355 | 2566 | |
992c052c LP |
2567 | return bus_poll(bus, false, timeout_usec); |
2568 | } | |
9db76355 | 2569 | |
d9f644e2 | 2570 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2571 | int r; |
9db76355 | 2572 | |
d6888822 | 2573 | assert_return(bus, -EINVAL); |
d6888822 | 2574 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2575 | |
718db961 LP |
2576 | if (bus->state == BUS_CLOSING) |
2577 | return 0; | |
2578 | ||
2579 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
2580 | ||
992c052c LP |
2581 | r = bus_ensure_running(bus); |
2582 | if (r < 0) | |
2583 | return r; | |
9db76355 | 2584 | |
992c052c LP |
2585 | if (bus->wqueue_size <= 0) |
2586 | return 0; | |
9db76355 | 2587 | |
992c052c LP |
2588 | for (;;) { |
2589 | r = dispatch_wqueue(bus); | |
32f46480 | 2590 | if (r < 0) { |
441d56a1 | 2591 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2592 | bus_enter_closing(bus); |
441d56a1 LP |
2593 | return -ECONNRESET; |
2594 | } | |
32f46480 | 2595 | |
9db76355 | 2596 | return r; |
32f46480 | 2597 | } |
9db76355 | 2598 | |
992c052c LP |
2599 | if (bus->wqueue_size <= 0) |
2600 | return 0; | |
9db76355 | 2601 | |
992c052c | 2602 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2603 | if (r < 0) |
2604 | return r; | |
9db76355 | 2605 | } |
9db76355 LP |
2606 | } |
2607 | ||
d9f644e2 ZJS |
2608 | _public_ int sd_bus_add_filter(sd_bus *bus, |
2609 | sd_bus_message_handler_t callback, | |
2610 | void *userdata) { | |
2611 | ||
992c052c | 2612 | struct filter_callback *f; |
de1c301e | 2613 | |
d6888822 LP |
2614 | assert_return(bus, -EINVAL); |
2615 | assert_return(callback, -EINVAL); | |
2616 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2617 | |
992c052c LP |
2618 | f = new0(struct filter_callback, 1); |
2619 | if (!f) | |
29ddb38f | 2620 | return -ENOMEM; |
992c052c LP |
2621 | f->callback = callback; |
2622 | f->userdata = userdata; | |
29ddb38f | 2623 | |
992c052c | 2624 | bus->filter_callbacks_modified = true; |
71fda00f | 2625 | LIST_PREPEND(callbacks, bus->filter_callbacks, f); |
de1c301e LP |
2626 | return 0; |
2627 | } | |
a652755d | 2628 | |
d9f644e2 ZJS |
2629 | _public_ int sd_bus_remove_filter(sd_bus *bus, |
2630 | sd_bus_message_handler_t callback, | |
2631 | void *userdata) { | |
2632 | ||
992c052c | 2633 | struct filter_callback *f; |
a652755d | 2634 | |
d6888822 LP |
2635 | assert_return(bus, -EINVAL); |
2636 | assert_return(callback, -EINVAL); | |
2637 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
a652755d | 2638 | |
992c052c LP |
2639 | LIST_FOREACH(callbacks, f, bus->filter_callbacks) { |
2640 | if (f->callback == callback && f->userdata == userdata) { | |
2641 | bus->filter_callbacks_modified = true; | |
71fda00f | 2642 | LIST_REMOVE(callbacks, bus->filter_callbacks, f); |
992c052c LP |
2643 | free(f); |
2644 | return 1; | |
29ddb38f LP |
2645 | } |
2646 | } | |
2647 | ||
992c052c | 2648 | return 0; |
a652755d | 2649 | } |
392d5b37 | 2650 | |
d9f644e2 ZJS |
2651 | _public_ int sd_bus_add_match(sd_bus *bus, |
2652 | const char *match, | |
2653 | sd_bus_message_handler_t callback, | |
2654 | void *userdata) { | |
2655 | ||
992c052c LP |
2656 | struct bus_match_component *components = NULL; |
2657 | unsigned n_components = 0; | |
2658 | uint64_t cookie = 0; | |
2659 | int r = 0; | |
392d5b37 | 2660 | |
d6888822 LP |
2661 | assert_return(bus, -EINVAL); |
2662 | assert_return(match, -EINVAL); | |
2663 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2664 | |
992c052c LP |
2665 | r = bus_match_parse(match, &components, &n_components); |
2666 | if (r < 0) | |
2667 | goto finish; | |
29ddb38f | 2668 | |
992c052c LP |
2669 | if (bus->bus_client) { |
2670 | cookie = ++bus->match_cookie; | |
29ddb38f | 2671 | |
992c052c LP |
2672 | r = bus_add_match_internal(bus, match, components, n_components, cookie); |
2673 | if (r < 0) | |
2674 | goto finish; | |
392d5b37 LP |
2675 | } |
2676 | ||
992c052c LP |
2677 | bus->match_callbacks_modified = true; |
2678 | r = bus_match_add(&bus->match_callbacks, components, n_components, callback, userdata, cookie, NULL); | |
29ddb38f | 2679 | if (r < 0) { |
992c052c LP |
2680 | if (bus->bus_client) |
2681 | bus_remove_match_internal(bus, match, cookie); | |
29ddb38f | 2682 | } |
917b5dc7 | 2683 | |
992c052c LP |
2684 | finish: |
2685 | bus_match_parse_free(components, n_components); | |
2686 | return r; | |
917b5dc7 LP |
2687 | } |
2688 | ||
d9f644e2 ZJS |
2689 | _public_ int sd_bus_remove_match(sd_bus *bus, |
2690 | const char *match, | |
2691 | sd_bus_message_handler_t callback, | |
2692 | void *userdata) { | |
2693 | ||
992c052c LP |
2694 | struct bus_match_component *components = NULL; |
2695 | unsigned n_components = 0; | |
2696 | int r = 0, q = 0; | |
2697 | uint64_t cookie = 0; | |
917b5dc7 | 2698 | |
d6888822 LP |
2699 | assert_return(bus, -EINVAL); |
2700 | assert_return(match, -EINVAL); | |
2701 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 2702 | |
992c052c | 2703 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f LP |
2704 | if (r < 0) |
2705 | return r; | |
f10dda3b | 2706 | |
992c052c LP |
2707 | bus->match_callbacks_modified = true; |
2708 | r = bus_match_remove(&bus->match_callbacks, components, n_components, callback, userdata, &cookie); | |
f10dda3b | 2709 | |
992c052c LP |
2710 | if (bus->bus_client) |
2711 | q = bus_remove_match_internal(bus, match, cookie); | |
f10dda3b | 2712 | |
992c052c | 2713 | bus_match_parse_free(components, n_components); |
f10dda3b | 2714 | |
992c052c | 2715 | return r < 0 ? r : q; |
f10dda3b LP |
2716 | } |
2717 | ||
992c052c LP |
2718 | bool bus_pid_changed(sd_bus *bus) { |
2719 | assert(bus); | |
f10dda3b | 2720 | |
992c052c LP |
2721 | /* We don't support people creating a bus connection and |
2722 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 2723 | |
992c052c | 2724 | return bus->original_pid != getpid(); |
d5a2b9a6 | 2725 | } |
40ca29a1 LP |
2726 | |
2727 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 2728 | sd_bus *bus = userdata; |
40ca29a1 LP |
2729 | int r; |
2730 | ||
2731 | assert(bus); | |
2732 | ||
2733 | r = sd_bus_process(bus, NULL); | |
2734 | if (r < 0) | |
2735 | return r; | |
2736 | ||
2737 | return 1; | |
2738 | } | |
2739 | ||
2740 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 2741 | sd_bus *bus = userdata; |
40ca29a1 LP |
2742 | int r; |
2743 | ||
2744 | assert(bus); | |
2745 | ||
2746 | r = sd_bus_process(bus, NULL); | |
2747 | if (r < 0) | |
2748 | return r; | |
2749 | ||
2750 | return 1; | |
2751 | } | |
2752 | ||
2753 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
2754 | sd_bus *bus = userdata; | |
2755 | int r, e; | |
2756 | usec_t until; | |
2757 | ||
2758 | assert(s); | |
2759 | assert(bus); | |
2760 | ||
2761 | e = sd_bus_get_events(bus); | |
2762 | if (e < 0) | |
2763 | return e; | |
2764 | ||
2765 | if (bus->output_fd != bus->input_fd) { | |
2766 | ||
2767 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
2768 | if (r < 0) | |
2769 | return r; | |
2770 | ||
2771 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
2772 | if (r < 0) | |
2773 | return r; | |
2774 | } else { | |
2775 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
2776 | if (r < 0) | |
2777 | return r; | |
2778 | } | |
2779 | ||
2780 | r = sd_bus_get_timeout(bus, &until); | |
2781 | if (r < 0) | |
2782 | return r; | |
2783 | if (r > 0) { | |
2784 | int j; | |
2785 | ||
2786 | j = sd_event_source_set_time(bus->time_event_source, until); | |
2787 | if (j < 0) | |
2788 | return j; | |
2789 | } | |
2790 | ||
2791 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
2792 | if (r < 0) | |
2793 | return r; | |
2794 | ||
2795 | return 1; | |
2796 | } | |
2797 | ||
abc5fe72 LP |
2798 | static int quit_callback(sd_event_source *event, void *userdata) { |
2799 | sd_bus *bus = userdata; | |
2800 | ||
2801 | assert(event); | |
2802 | ||
2803 | sd_bus_flush(bus); | |
2804 | ||
2805 | return 1; | |
2806 | } | |
2807 | ||
1e05d493 LP |
2808 | static int attach_io_events(sd_bus *bus) { |
2809 | int r; | |
2810 | ||
2811 | assert(bus); | |
2812 | ||
2813 | if (bus->input_fd < 0) | |
2814 | return 0; | |
2815 | ||
2816 | if (!bus->event) | |
2817 | return 0; | |
2818 | ||
2819 | if (!bus->input_io_event_source) { | |
2820 | r = sd_event_add_io(bus->event, bus->input_fd, 0, io_callback, bus, &bus->input_io_event_source); | |
2821 | if (r < 0) | |
2822 | return r; | |
2823 | ||
2824 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
2825 | if (r < 0) | |
2826 | return r; | |
2827 | ||
2828 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
2829 | } else | |
2830 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
2831 | ||
2832 | if (r < 0) | |
2833 | return r; | |
2834 | ||
2835 | if (bus->output_fd != bus->input_fd) { | |
2836 | assert(bus->output_fd >= 0); | |
2837 | ||
2838 | if (!bus->output_io_event_source) { | |
2839 | r = sd_event_add_io(bus->event, bus->output_fd, 0, io_callback, bus, &bus->output_io_event_source); | |
2840 | if (r < 0) | |
2841 | return r; | |
2842 | ||
2843 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
2844 | } else | |
2845 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
2846 | ||
2847 | if (r < 0) | |
2848 | return r; | |
2849 | } | |
2850 | ||
2851 | return 0; | |
2852 | } | |
2853 | ||
2854 | static void detach_io_events(sd_bus *bus) { | |
2855 | assert(bus); | |
2856 | ||
2857 | if (bus->input_io_event_source) { | |
2858 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
2859 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
2860 | } | |
2861 | ||
2862 | if (bus->output_io_event_source) { | |
2863 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
2864 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
2865 | } | |
2866 | } | |
2867 | ||
d9f644e2 | 2868 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
2869 | int r; |
2870 | ||
2871 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
2872 | assert_return(!bus->event, -EBUSY); |
2873 | ||
2874 | assert(!bus->input_io_event_source); | |
2875 | assert(!bus->output_io_event_source); | |
2876 | assert(!bus->time_event_source); | |
2877 | ||
76b54375 LP |
2878 | if (event) |
2879 | bus->event = sd_event_ref(event); | |
2880 | else { | |
2881 | r = sd_event_default(&bus->event); | |
2882 | if (r < 0) | |
2883 | return r; | |
2884 | } | |
40ca29a1 | 2885 | |
1e05d493 | 2886 | bus->event_priority = priority; |
40ca29a1 | 2887 | |
76b54375 | 2888 | r = sd_event_add_monotonic(bus->event, 0, 0, time_callback, bus, &bus->time_event_source); |
40ca29a1 LP |
2889 | if (r < 0) |
2890 | goto fail; | |
2891 | ||
2892 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
2893 | if (r < 0) | |
2894 | goto fail; | |
2895 | ||
6203e07a | 2896 | r = sd_event_add_exit(bus->event, quit_callback, bus, &bus->quit_event_source); |
abc5fe72 LP |
2897 | if (r < 0) |
2898 | goto fail; | |
2899 | ||
1e05d493 LP |
2900 | r = attach_io_events(bus); |
2901 | if (r < 0) | |
2902 | goto fail; | |
2903 | ||
40ca29a1 LP |
2904 | return 0; |
2905 | ||
2906 | fail: | |
2907 | sd_bus_detach_event(bus); | |
2908 | return r; | |
2909 | } | |
2910 | ||
d9f644e2 | 2911 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 2912 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
2913 | |
2914 | if (!bus->event) | |
2915 | return 0; | |
40ca29a1 | 2916 | |
1e05d493 | 2917 | detach_io_events(bus); |
40ca29a1 | 2918 | |
86befb40 LP |
2919 | if (bus->time_event_source) { |
2920 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 2921 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 2922 | } |
40ca29a1 | 2923 | |
86befb40 LP |
2924 | if (bus->quit_event_source) { |
2925 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 2926 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 2927 | } |
abc5fe72 | 2928 | |
40ca29a1 LP |
2929 | if (bus->event) |
2930 | bus->event = sd_event_unref(bus->event); | |
2931 | ||
a82cafb9 | 2932 | return 1; |
40ca29a1 | 2933 | } |
affff0b6 | 2934 | |
2be44176 LP |
2935 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
2936 | assert_return(bus, NULL); | |
2937 | ||
2938 | return bus->event; | |
2939 | } | |
2940 | ||
76b54375 | 2941 | _public_ sd_bus_message* sd_bus_get_current(sd_bus *bus) { |
affff0b6 LP |
2942 | assert_return(bus, NULL); |
2943 | ||
2944 | return bus->current; | |
2945 | } | |
76b54375 LP |
2946 | |
2947 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { | |
2948 | sd_bus *b = NULL; | |
2949 | int r; | |
2950 | ||
2951 | assert(bus_open); | |
2952 | assert(default_bus); | |
2953 | ||
2954 | if (!ret) | |
2955 | return !!*default_bus; | |
2956 | ||
2957 | if (*default_bus) { | |
2958 | *ret = sd_bus_ref(*default_bus); | |
2959 | return 0; | |
2960 | } | |
2961 | ||
2962 | r = bus_open(&b); | |
2963 | if (r < 0) | |
2964 | return r; | |
2965 | ||
2966 | b->default_bus_ptr = default_bus; | |
2967 | b->tid = gettid(); | |
2968 | *default_bus = b; | |
2969 | ||
2970 | *ret = b; | |
2971 | return 1; | |
2972 | } | |
2973 | ||
2974 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
ec202eae | 2975 | static thread_local sd_bus *default_system_bus = NULL; |
76b54375 LP |
2976 | |
2977 | return bus_default(sd_bus_open_system, &default_system_bus, ret); | |
2978 | } | |
2979 | ||
2980 | _public_ int sd_bus_default_user(sd_bus **ret) { | |
ec202eae | 2981 | static thread_local sd_bus *default_user_bus = NULL; |
76b54375 LP |
2982 | |
2983 | return bus_default(sd_bus_open_user, &default_user_bus, ret); | |
2984 | } | |
2985 | ||
af08d2f9 LP |
2986 | _public_ int sd_bus_default(sd_bus **ret) { |
2987 | ||
2988 | const char *e; | |
2989 | ||
2990 | /* Let's try our best to reuse another cached connection. If | |
2991 | * the starter bus type is set, connect via our normal | |
2992 | * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that | |
2993 | * we can share the connection with the user/system default | |
2994 | * bus. */ | |
2995 | ||
2996 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
2997 | if (e) { | |
2998 | if (streq(e, "system")) | |
2999 | return sd_bus_default_system(ret); | |
3000 | else if (streq(e, "user") || streq(e, "session")) | |
3001 | return sd_bus_default_user(ret); | |
3002 | } | |
3003 | ||
3004 | /* No type is specified, so we have not other option than to | |
3005 | * use the starter address if it is set. */ | |
3006 | ||
3007 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
3008 | if (e) { | |
3009 | static thread_local sd_bus *default_starter_bus = NULL; | |
3010 | ||
3011 | return bus_default(sd_bus_open, &default_starter_bus, ret); | |
3012 | } | |
3013 | ||
3014 | /* Finally, if nothing is set use the cached connection for | |
3015 | * the right scope */ | |
3016 | ||
3017 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
3018 | return sd_bus_default_user(ret); | |
3019 | else | |
3020 | return sd_bus_default_system(ret); | |
3021 | } | |
3022 | ||
76b54375 LP |
3023 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3024 | assert_return(b, -EINVAL); | |
3025 | assert_return(tid, -EINVAL); | |
3026 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3027 | ||
3028 | if (b->tid != 0) { | |
3029 | *tid = b->tid; | |
3030 | return 0; | |
3031 | } | |
3032 | ||
3033 | if (b->event) | |
3034 | return sd_event_get_tid(b->event, tid); | |
3035 | ||
3036 | return -ENXIO; | |
3037 | } | |
28383ba1 LP |
3038 | |
3039 | _public_ char *sd_bus_label_escape(const char *s) { | |
3040 | char *r, *t; | |
3041 | const char *f; | |
3042 | ||
3043 | assert_return(s, NULL); | |
3044 | ||
3045 | /* Escapes all chars that D-Bus' object path cannot deal | |
3046 | * with. Can be reversed with bus_path_unescape(). We special | |
3047 | * case the empty string. */ | |
3048 | ||
3049 | if (*s == 0) | |
3050 | return strdup("_"); | |
3051 | ||
3052 | r = new(char, strlen(s)*3 + 1); | |
3053 | if (!r) | |
3054 | return NULL; | |
3055 | ||
3056 | for (f = s, t = r; *f; f++) { | |
3057 | ||
3058 | /* Escape everything that is not a-zA-Z0-9. We also | |
3059 | * escape 0-9 if it's the first character */ | |
3060 | ||
3061 | if (!(*f >= 'A' && *f <= 'Z') && | |
3062 | !(*f >= 'a' && *f <= 'z') && | |
3063 | !(f > s && *f >= '0' && *f <= '9')) { | |
3064 | *(t++) = '_'; | |
3065 | *(t++) = hexchar(*f >> 4); | |
3066 | *(t++) = hexchar(*f); | |
3067 | } else | |
3068 | *(t++) = *f; | |
3069 | } | |
3070 | ||
3071 | *t = 0; | |
3072 | ||
3073 | return r; | |
3074 | } | |
3075 | ||
3076 | _public_ char *sd_bus_label_unescape(const char *f) { | |
3077 | char *r, *t; | |
3078 | ||
3079 | assert_return(f, NULL); | |
3080 | ||
3081 | /* Special case for the empty string */ | |
3082 | if (streq(f, "_")) | |
3083 | return strdup(""); | |
3084 | ||
3085 | r = new(char, strlen(f) + 1); | |
3086 | if (!r) | |
3087 | return NULL; | |
3088 | ||
3089 | for (t = r; *f; f++) { | |
3090 | ||
3091 | if (*f == '_') { | |
3092 | int a, b; | |
3093 | ||
3094 | if ((a = unhexchar(f[1])) < 0 || | |
3095 | (b = unhexchar(f[2])) < 0) { | |
3096 | /* Invalid escape code, let's take it literal then */ | |
3097 | *(t++) = '_'; | |
3098 | } else { | |
3099 | *(t++) = (char) ((a << 4) | b); | |
3100 | f += 2; | |
3101 | } | |
3102 | } else | |
3103 | *(t++) = *f; | |
3104 | } | |
3105 | ||
3106 | *t = 0; | |
3107 | ||
3108 | return r; | |
3109 | } | |
5b12334d LP |
3110 | |
3111 | _public_ int sd_bus_get_peer_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) { | |
3112 | sd_bus_creds *c; | |
3113 | pid_t pid = 0; | |
3114 | int r; | |
3115 | ||
3116 | assert_return(bus, -EINVAL); | |
95c4fe82 | 3117 | assert_return(mask <= _SD_BUS_CREDS_ALL, -ENOTSUP); |
5b12334d LP |
3118 | assert_return(ret, -EINVAL); |
3119 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
3120 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3121 | assert_return(!bus->is_kernel, -ENOTSUP); | |
3122 | ||
3123 | if (!bus->ucred_valid && !isempty(bus->label)) | |
3124 | return -ENODATA; | |
3125 | ||
3126 | c = bus_creds_new(); | |
3127 | if (!c) | |
3128 | return -ENOMEM; | |
3129 | ||
3130 | if (bus->ucred_valid) { | |
3131 | pid = c->pid = bus->ucred.pid; | |
3132 | c->uid = bus->ucred.uid; | |
3133 | c->gid = bus->ucred.gid; | |
3134 | ||
3310dfd5 | 3135 | c->mask |= (SD_BUS_CREDS_UID | SD_BUS_CREDS_PID | SD_BUS_CREDS_GID) & mask; |
5b12334d LP |
3136 | } |
3137 | ||
3138 | if (!isempty(bus->label) && (mask & SD_BUS_CREDS_SELINUX_CONTEXT)) { | |
3139 | c->label = strdup(bus->label); | |
3140 | if (!c->label) { | |
3141 | sd_bus_creds_unref(c); | |
3142 | return -ENOMEM; | |
3143 | } | |
3144 | ||
3310dfd5 | 3145 | c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT; |
5b12334d LP |
3146 | } |
3147 | ||
3148 | r = bus_creds_add_more(c, mask, pid, 0); | |
3149 | if (r < 0) | |
3150 | return r; | |
3151 | ||
3152 | *ret = c; | |
3153 | return 0; | |
3154 | } | |
ae095f86 LP |
3155 | |
3156 | _public_ int sd_bus_try_close(sd_bus *bus) { | |
3157 | int r; | |
3158 | ||
3159 | assert_return(bus, -EINVAL); | |
3160 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
3161 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3162 | assert_return(bus->is_kernel, -ENOTSUP); | |
3163 | ||
bd746b8b LP |
3164 | if (bus->rqueue_size > 0) |
3165 | return -EBUSY; | |
3166 | ||
14f862a5 LP |
3167 | if (bus->wqueue_size > 0) |
3168 | return -EBUSY; | |
3169 | ||
ae095f86 LP |
3170 | r = bus_kernel_try_close(bus); |
3171 | if (r < 0) | |
3172 | return r; | |
3173 | ||
3174 | sd_bus_close(bus); | |
3175 | return 0; | |
3176 | } | |
5972fe95 LP |
3177 | |
3178 | _public_ int sd_bus_get_name(sd_bus *bus, const char **name) { | |
3179 | assert_return(bus, -EINVAL); | |
3180 | assert_return(name, -EINVAL); | |
3181 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3182 | ||
3183 | *name = bus->connection_name; | |
3184 | return 0; | |
3185 | } |