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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> | |
de1c301e LP |
23 | #include <stdlib.h> |
24 | #include <unistd.h> | |
25 | #include <netdb.h> | |
0a6f50c0 | 26 | #include <poll.h> |
63edf05e | 27 | #include <sys/mman.h> |
45fbe937 | 28 | #include <pthread.h> |
de1c301e LP |
29 | |
30 | #include "util.h" | |
31 | #include "macro.h" | |
2fd9ae2e | 32 | #include "strv.h" |
6c03089c | 33 | #include "missing.h" |
ab9001a1 | 34 | #include "def.h" |
af08d2f9 | 35 | #include "cgroup-util.h" |
f01de965 | 36 | #include "bus-label.h" |
de1c301e LP |
37 | |
38 | #include "sd-bus.h" | |
39 | #include "bus-internal.h" | |
40 | #include "bus-message.h" | |
41 | #include "bus-type.h" | |
a7e3212d | 42 | #include "bus-socket.h" |
6629161f | 43 | #include "bus-kernel.h" |
392d5b37 | 44 | #include "bus-control.h" |
992c052c | 45 | #include "bus-objects.h" |
40ca29a1 | 46 | #include "bus-util.h" |
a7893c6b | 47 | #include "bus-container.h" |
0461f8cd | 48 | #include "bus-protocol.h" |
8f8f05a9 | 49 | #include "bus-track.h" |
19befb2d | 50 | #include "bus-slot.h" |
de1c301e | 51 | |
b56c4604 LP |
52 | #define log_debug_bus_message(m) \ |
53 | do { \ | |
54 | sd_bus_message *_mm = (m); \ | |
55 | log_debug("Got message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s", \ | |
56 | bus_message_type_to_string(_mm->header->type), \ | |
57 | strna(sd_bus_message_get_sender(_mm)), \ | |
58 | strna(sd_bus_message_get_destination(_mm)), \ | |
59 | strna(sd_bus_message_get_path(_mm)), \ | |
60 | strna(sd_bus_message_get_interface(_mm)), \ | |
61 | strna(sd_bus_message_get_member(_mm)), \ | |
62 | BUS_MESSAGE_COOKIE(_mm), \ | |
63 | _mm->reply_cookie, \ | |
64 | strna(_mm->error.message)); \ | |
65 | } while (false) | |
f9f97ca6 | 66 | |
e3017af9 | 67 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
1e05d493 LP |
68 | static int attach_io_events(sd_bus *b); |
69 | static void detach_io_events(sd_bus *b); | |
e3017af9 | 70 | |
f54514f3 LP |
71 | static void bus_close_fds(sd_bus *b) { |
72 | assert(b); | |
73 | ||
1e05d493 LP |
74 | detach_io_events(b); |
75 | ||
0fd8d506 | 76 | if (b->input_fd != b->output_fd) |
03e334a1 | 77 | safe_close(b->output_fd); |
0fd8d506 | 78 | b->output_fd = b->input_fd = safe_close(b->input_fd); |
f54514f3 LP |
79 | } |
80 | ||
0e586eae | 81 | static void bus_reset_queues(sd_bus *b) { |
0e586eae LP |
82 | assert(b); |
83 | ||
f389bf15 LP |
84 | while (b->rqueue_size > 0) |
85 | sd_bus_message_unref(b->rqueue[--b->rqueue_size]); | |
86 | ||
253f96e5 | 87 | b->rqueue = mfree(b->rqueue); |
f389bf15 | 88 | b->rqueue_allocated = 0; |
0e586eae | 89 | |
f389bf15 LP |
90 | while (b->wqueue_size > 0) |
91 | sd_bus_message_unref(b->wqueue[--b->wqueue_size]); | |
0e586eae | 92 | |
253f96e5 | 93 | b->wqueue = mfree(b->wqueue); |
f389bf15 | 94 | b->wqueue_allocated = 0; |
0e586eae LP |
95 | } |
96 | ||
de1c301e | 97 | static void bus_free(sd_bus *b) { |
19befb2d | 98 | sd_bus_slot *s; |
de1c301e LP |
99 | |
100 | assert(b); | |
8f8f05a9 LP |
101 | assert(!b->track_queue); |
102 | ||
19befb2d LP |
103 | b->state = BUS_CLOSED; |
104 | ||
40ca29a1 LP |
105 | sd_bus_detach_event(b); |
106 | ||
19befb2d LP |
107 | while ((s = b->slots)) { |
108 | /* At this point only floating slots can still be | |
109 | * around, because the non-floating ones keep a | |
110 | * reference to the bus, and we thus couldn't be | |
111 | * destructing right now... We forcibly disconnect the | |
112 | * slots here, so that they still can be referenced by | |
113 | * apps, but are dead. */ | |
114 | ||
115 | assert(s->floating); | |
116 | bus_slot_disconnect(s); | |
117 | sd_bus_slot_unref(s); | |
118 | } | |
119 | ||
f4d140e9 LP |
120 | if (b->default_bus_ptr) |
121 | *b->default_bus_ptr = NULL; | |
122 | ||
f54514f3 | 123 | bus_close_fds(b); |
de1c301e | 124 | |
63edf05e LP |
125 | if (b->kdbus_buffer) |
126 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
127 | ||
c4e6556c | 128 | free(b->label); |
de1c301e | 129 | free(b->rbuffer); |
89ffcd2a | 130 | free(b->unique_name); |
2181a7f5 | 131 | free(b->auth_buffer); |
89ffcd2a | 132 | free(b->address); |
e9a967f9 | 133 | free(b->kernel); |
a7893c6b | 134 | free(b->machine); |
8a0e0ed9 | 135 | free(b->fake_label); |
751bc6ac | 136 | free(b->cgroup_root); |
455971c1 | 137 | free(b->description); |
89ffcd2a | 138 | |
2fd9ae2e LP |
139 | free(b->exec_path); |
140 | strv_free(b->exec_argv); | |
141 | ||
2c93b4ef LP |
142 | close_many(b->fds, b->n_fds); |
143 | free(b->fds); | |
144 | ||
0e586eae | 145 | bus_reset_queues(b); |
de1c301e | 146 | |
c9fe4af7 | 147 | ordered_hashmap_free_free(b->reply_callbacks); |
e3017af9 | 148 | prioq_free(b->reply_callbacks_prioq); |
de1c301e | 149 | |
75a0da95 | 150 | assert(b->match_callbacks.type == BUS_MATCH_ROOT); |
392d5b37 LP |
151 | bus_match_free(&b->match_callbacks); |
152 | ||
29ddb38f LP |
153 | hashmap_free_free(b->vtable_methods); |
154 | hashmap_free_free(b->vtable_properties); | |
155 | ||
19befb2d | 156 | assert(hashmap_isempty(b->nodes)); |
29ddb38f LP |
157 | hashmap_free(b->nodes); |
158 | ||
bc7fd8cd LP |
159 | bus_kernel_flush_memfd(b); |
160 | ||
45fbe937 LP |
161 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
162 | ||
de1c301e LP |
163 | free(b); |
164 | } | |
165 | ||
d9f644e2 | 166 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
167 | sd_bus *r; |
168 | ||
d6888822 | 169 | assert_return(ret, -EINVAL); |
021a1e78 | 170 | |
de1c301e LP |
171 | r = new0(sd_bus, 1); |
172 | if (!r) | |
021a1e78 | 173 | return -ENOMEM; |
de1c301e | 174 | |
e4ee6e5c | 175 | r->n_ref = REFCNT_INIT; |
e82c9509 | 176 | r->input_fd = r->output_fd = -1; |
de1c301e | 177 | r->message_version = 1; |
3310dfd5 | 178 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
c32195e0 | 179 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d21a7bb1 | 180 | r->attach_flags |= KDBUS_ATTACH_NAMES; |
d5a2b9a6 | 181 | r->original_pid = getpid(); |
de1c301e | 182 | |
45fbe937 LP |
183 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
184 | ||
de1c301e LP |
185 | /* We guarantee that wqueue always has space for at least one |
186 | * entry */ | |
821e0756 | 187 | if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) { |
de1c301e | 188 | free(r); |
021a1e78 | 189 | return -ENOMEM; |
de1c301e LP |
190 | } |
191 | ||
021a1e78 LP |
192 | *ret = r; |
193 | return 0; | |
194 | } | |
195 | ||
d9f644e2 | 196 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
197 | char *a; |
198 | ||
d6888822 LP |
199 | assert_return(bus, -EINVAL); |
200 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
201 | assert_return(address, -EINVAL); | |
202 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
203 | |
204 | a = strdup(address); | |
205 | if (!a) | |
206 | return -ENOMEM; | |
207 | ||
208 | free(bus->address); | |
209 | bus->address = a; | |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
d9f644e2 | 214 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
215 | assert_return(bus, -EINVAL); |
216 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
217 | assert_return(input_fd >= 0, -EINVAL); | |
218 | assert_return(output_fd >= 0, -EINVAL); | |
219 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 220 | |
e82c9509 LP |
221 | bus->input_fd = input_fd; |
222 | bus->output_fd = output_fd; | |
021a1e78 LP |
223 | return 0; |
224 | } | |
225 | ||
d9f644e2 | 226 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
227 | char *p, **a; |
228 | ||
d6888822 LP |
229 | assert_return(bus, -EINVAL); |
230 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
231 | assert_return(path, -EINVAL); | |
232 | assert_return(!strv_isempty(argv), -EINVAL); | |
233 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
234 | |
235 | p = strdup(path); | |
236 | if (!p) | |
237 | return -ENOMEM; | |
238 | ||
239 | a = strv_copy(argv); | |
240 | if (!a) { | |
241 | free(p); | |
242 | return -ENOMEM; | |
243 | } | |
244 | ||
245 | free(bus->exec_path); | |
246 | strv_free(bus->exec_argv); | |
247 | ||
248 | bus->exec_path = p; | |
249 | bus->exec_argv = a; | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
d9f644e2 | 254 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
255 | assert_return(bus, -EINVAL); |
256 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
257 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 258 | |
94bbf1ba | 259 | bus->bus_client = !!b; |
021a1e78 LP |
260 | return 0; |
261 | } | |
262 | ||
09365592 LP |
263 | _public_ int sd_bus_set_monitor(sd_bus *bus, int b) { |
264 | assert_return(bus, -EINVAL); | |
265 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
266 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
267 | ||
268 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_MONITOR, b); | |
269 | return 0; | |
270 | } | |
271 | ||
d9f644e2 | 272 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
273 | assert_return(bus, -EINVAL); |
274 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
275 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 276 | |
264ad849 LP |
277 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
278 | return 0; | |
279 | } | |
280 | ||
4fc31988 | 281 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
b5dae4c7 | 282 | uint64_t new_flags; |
16be4368 | 283 | assert_return(bus, -EINVAL); |
b5dae4c7 | 284 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
285 | assert_return(!bus_pid_changed(bus), -ECHILD); |
286 | ||
b5dae4c7 LP |
287 | new_flags = bus->attach_flags; |
288 | SET_FLAG(new_flags, KDBUS_ATTACH_TIMESTAMP, b); | |
289 | ||
290 | if (bus->attach_flags == new_flags) | |
291 | return 0; | |
292 | ||
293 | bus->attach_flags = new_flags; | |
294 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
295 | bus_kernel_realize_attach_flags(bus); | |
296 | ||
16be4368 KS |
297 | return 0; |
298 | } | |
299 | ||
b5dae4c7 LP |
300 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) { |
301 | uint64_t new_flags; | |
302 | ||
16be4368 | 303 | assert_return(bus, -EINVAL); |
95c4fe82 | 304 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
b5dae4c7 | 305 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
306 | assert_return(!bus_pid_changed(bus), -ECHILD); |
307 | ||
b5dae4c7 LP |
308 | if (b) |
309 | bus->creds_mask |= mask; | |
310 | else | |
311 | bus->creds_mask &= ~mask; | |
312 | ||
49b832c5 | 313 | /* The well knowns we need unconditionally, so that matches can work */ |
b5dae4c7 LP |
314 | bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
315 | ||
316 | /* Make sure we don't lose the timestamp flag */ | |
317 | new_flags = (bus->attach_flags & KDBUS_ATTACH_TIMESTAMP) | attach_flags_to_kdbus(bus->creds_mask); | |
318 | if (bus->attach_flags == new_flags) | |
319 | return 0; | |
49b832c5 | 320 | |
b5dae4c7 LP |
321 | bus->attach_flags = new_flags; |
322 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
323 | bus_kernel_realize_attach_flags(bus); | |
324 | ||
325 | return 0; | |
021a1e78 | 326 | } |
de1c301e | 327 | |
d9f644e2 | 328 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
329 | assert_return(bus, -EINVAL); |
330 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
331 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
332 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
333 | |
334 | bus->is_server = !!b; | |
98178d39 | 335 | bus->server_id = server_id; |
2181a7f5 LP |
336 | return 0; |
337 | } | |
338 | ||
d9f644e2 | 339 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
340 | assert_return(bus, -EINVAL); |
341 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
342 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
343 | |
344 | bus->anonymous_auth = !!b; | |
345 | return 0; | |
346 | } | |
347 | ||
adacb957 LP |
348 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
349 | assert_return(bus, -EINVAL); | |
350 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
351 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
352 | ||
353 | bus->trusted = !!b; | |
354 | return 0; | |
355 | } | |
356 | ||
455971c1 | 357 | _public_ int sd_bus_set_description(sd_bus *bus, const char *description) { |
5972fe95 | 358 | assert_return(bus, -EINVAL); |
5972fe95 LP |
359 | assert_return(bus->state == BUS_UNSET, -EPERM); |
360 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
361 | ||
d1b91c99 | 362 | return free_and_strdup(&bus->description, description); |
5972fe95 LP |
363 | } |
364 | ||
c0765ddb LP |
365 | _public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) { |
366 | assert_return(bus, -EINVAL); | |
367 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
368 | ||
369 | bus->allow_interactive_authorization = !!b; | |
370 | return 0; | |
371 | } | |
372 | ||
373 | _public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) { | |
374 | assert_return(bus, -EINVAL); | |
375 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
376 | ||
377 | return bus->allow_interactive_authorization; | |
378 | } | |
379 | ||
19070062 | 380 | static int hello_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e | 381 | const char *s; |
19070062 | 382 | sd_bus *bus; |
de1c301e LP |
383 | int r; |
384 | ||
19070062 LP |
385 | assert(reply); |
386 | bus = reply->bus; | |
de1c301e | 387 | assert(bus); |
c99c09a2 | 388 | assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING); |
de1c301e | 389 | |
40ca29a1 | 390 | r = sd_bus_message_get_errno(reply); |
40ca29a1 LP |
391 | if (r > 0) |
392 | return -r; | |
eb01ba5d | 393 | |
de1c301e LP |
394 | r = sd_bus_message_read(reply, "s", &s); |
395 | if (r < 0) | |
396 | return r; | |
397 | ||
dafb7591 LP |
398 | if (!service_name_is_valid(s) || s[0] != ':') |
399 | return -EBADMSG; | |
400 | ||
de1c301e LP |
401 | bus->unique_name = strdup(s); |
402 | if (!bus->unique_name) | |
403 | return -ENOMEM; | |
404 | ||
c99c09a2 LP |
405 | if (bus->state == BUS_HELLO) |
406 | bus->state = BUS_RUNNING; | |
dafb7591 | 407 | |
de1c301e LP |
408 | return 1; |
409 | } | |
410 | ||
411 | static int bus_send_hello(sd_bus *bus) { | |
412 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
413 | int r; | |
414 | ||
415 | assert(bus); | |
416 | ||
6629161f | 417 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
418 | return 0; |
419 | ||
de1c301e LP |
420 | r = sd_bus_message_new_method_call( |
421 | bus, | |
151b9b96 | 422 | &m, |
de1c301e | 423 | "org.freedesktop.DBus", |
a7639e37 | 424 | "/org/freedesktop/DBus", |
de1c301e | 425 | "org.freedesktop.DBus", |
151b9b96 | 426 | "Hello"); |
de1c301e LP |
427 | if (r < 0) |
428 | return r; | |
429 | ||
19befb2d | 430 | return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0); |
de1c301e LP |
431 | } |
432 | ||
a7e3212d | 433 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
434 | assert(bus); |
435 | ||
f08838da | 436 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 437 | bus->state = BUS_HELLO; |
e3017af9 | 438 | return 1; |
de1c301e LP |
439 | } |
440 | ||
441 | bus->state = BUS_RUNNING; | |
e3017af9 | 442 | return 1; |
de1c301e LP |
443 | } |
444 | ||
445 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 446 | size_t l, n = 0, allocated = 0; |
de1c301e LP |
447 | const char *a; |
448 | char *r = NULL; | |
449 | ||
450 | assert(p); | |
451 | assert(*p); | |
de1c301e LP |
452 | assert(value); |
453 | ||
2fd9ae2e LP |
454 | if (key) { |
455 | l = strlen(key); | |
456 | if (strncmp(*p, key, l) != 0) | |
457 | return 0; | |
de1c301e | 458 | |
2fd9ae2e LP |
459 | if ((*p)[l] != '=') |
460 | return 0; | |
de1c301e | 461 | |
2fd9ae2e LP |
462 | if (*value) |
463 | return -EINVAL; | |
de1c301e | 464 | |
2fd9ae2e LP |
465 | a = *p + l + 1; |
466 | } else | |
467 | a = *p; | |
468 | ||
469 | while (*a != ';' && *a != ',' && *a != 0) { | |
821e0756 | 470 | char c; |
de1c301e LP |
471 | |
472 | if (*a == '%') { | |
473 | int x, y; | |
474 | ||
475 | x = unhexchar(a[1]); | |
476 | if (x < 0) { | |
477 | free(r); | |
478 | return x; | |
479 | } | |
480 | ||
481 | y = unhexchar(a[2]); | |
482 | if (y < 0) { | |
483 | free(r); | |
484 | return y; | |
485 | } | |
486 | ||
de1c301e | 487 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
488 | a += 3; |
489 | } else { | |
de1c301e | 490 | c = *a; |
89ffcd2a LP |
491 | a++; |
492 | } | |
de1c301e | 493 | |
821e0756 | 494 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 495 | return -ENOMEM; |
de1c301e | 496 | |
de1c301e LP |
497 | r[n++] = c; |
498 | } | |
499 | ||
89ffcd2a LP |
500 | if (!r) { |
501 | r = strdup(""); | |
502 | if (!r) | |
503 | return -ENOMEM; | |
504 | } else | |
505 | r[n] = 0; | |
506 | ||
507 | if (*a == ',') | |
508 | a++; | |
509 | ||
de1c301e | 510 | *p = a; |
2fd9ae2e LP |
511 | |
512 | free(*value); | |
de1c301e | 513 | *value = r; |
2fd9ae2e | 514 | |
de1c301e LP |
515 | return 1; |
516 | } | |
517 | ||
518 | static void skip_address_key(const char **p) { | |
519 | assert(p); | |
520 | assert(*p); | |
521 | ||
89ffcd2a LP |
522 | *p += strcspn(*p, ","); |
523 | ||
524 | if (**p == ',') | |
525 | (*p) ++; | |
de1c301e LP |
526 | } |
527 | ||
2fd9ae2e LP |
528 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
529 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
530 | size_t l; | |
de1c301e LP |
531 | int r; |
532 | ||
533 | assert(b); | |
2fd9ae2e LP |
534 | assert(p); |
535 | assert(*p); | |
536 | assert(guid); | |
de1c301e | 537 | |
2fd9ae2e LP |
538 | while (**p != 0 && **p != ';') { |
539 | r = parse_address_key(p, "guid", guid); | |
540 | if (r < 0) | |
541 | return r; | |
542 | else if (r > 0) | |
543 | continue; | |
de1c301e | 544 | |
2fd9ae2e LP |
545 | r = parse_address_key(p, "path", &path); |
546 | if (r < 0) | |
547 | return r; | |
548 | else if (r > 0) | |
549 | continue; | |
de1c301e | 550 | |
2fd9ae2e LP |
551 | r = parse_address_key(p, "abstract", &abstract); |
552 | if (r < 0) | |
553 | return r; | |
554 | else if (r > 0) | |
555 | continue; | |
de1c301e | 556 | |
2fd9ae2e LP |
557 | skip_address_key(p); |
558 | } | |
de1c301e | 559 | |
2fd9ae2e LP |
560 | if (!path && !abstract) |
561 | return -EINVAL; | |
de1c301e | 562 | |
2fd9ae2e LP |
563 | if (path && abstract) |
564 | return -EINVAL; | |
565 | ||
566 | if (path) { | |
567 | l = strlen(path); | |
568 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
569 | return -E2BIG; | |
de1c301e | 570 | |
2fd9ae2e LP |
571 | b->sockaddr.un.sun_family = AF_UNIX; |
572 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
573 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
574 | } else if (abstract) { | |
575 | l = strlen(abstract); | |
576 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
577 | return -E2BIG; | |
578 | ||
579 | b->sockaddr.un.sun_family = AF_UNIX; | |
580 | b->sockaddr.un.sun_path[0] = 0; | |
581 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
582 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
583 | } | |
584 | ||
585 | return 0; | |
586 | } | |
587 | ||
588 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
589 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 590 | int r; |
b92bea5d ZJS |
591 | struct addrinfo *result, hints = { |
592 | .ai_socktype = SOCK_STREAM, | |
593 | .ai_flags = AI_ADDRCONFIG, | |
594 | }; | |
2fd9ae2e LP |
595 | |
596 | assert(b); | |
597 | assert(p); | |
598 | assert(*p); | |
599 | assert(guid); | |
600 | ||
601 | while (**p != 0 && **p != ';') { | |
602 | r = parse_address_key(p, "guid", guid); | |
603 | if (r < 0) | |
604 | return r; | |
605 | else if (r > 0) | |
606 | continue; | |
607 | ||
608 | r = parse_address_key(p, "host", &host); | |
609 | if (r < 0) | |
610 | return r; | |
611 | else if (r > 0) | |
612 | continue; | |
613 | ||
614 | r = parse_address_key(p, "port", &port); | |
615 | if (r < 0) | |
616 | return r; | |
617 | else if (r > 0) | |
618 | continue; | |
619 | ||
620 | r = parse_address_key(p, "family", &family); | |
621 | if (r < 0) | |
622 | return r; | |
623 | else if (r > 0) | |
624 | continue; | |
625 | ||
626 | skip_address_key(p); | |
627 | } | |
628 | ||
629 | if (!host || !port) | |
630 | return -EINVAL; | |
631 | ||
2fd9ae2e LP |
632 | if (family) { |
633 | if (streq(family, "ipv4")) | |
634 | hints.ai_family = AF_INET; | |
635 | else if (streq(family, "ipv6")) | |
636 | hints.ai_family = AF_INET6; | |
637 | else | |
638 | return -EINVAL; | |
639 | } | |
640 | ||
641 | r = getaddrinfo(host, port, &hints, &result); | |
642 | if (r == EAI_SYSTEM) | |
643 | return -errno; | |
644 | else if (r != 0) | |
645 | return -EADDRNOTAVAIL; | |
646 | ||
647 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
648 | b->sockaddr_size = result->ai_addrlen; | |
649 | ||
650 | freeaddrinfo(result); | |
651 | ||
652 | return 0; | |
653 | } | |
654 | ||
655 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
656 | char *path = NULL; | |
657 | unsigned n_argv = 0, j; | |
658 | char **argv = NULL; | |
821e0756 | 659 | size_t allocated = 0; |
2fd9ae2e LP |
660 | int r; |
661 | ||
662 | assert(b); | |
663 | assert(p); | |
664 | assert(*p); | |
665 | assert(guid); | |
666 | ||
667 | while (**p != 0 && **p != ';') { | |
668 | r = parse_address_key(p, "guid", guid); | |
669 | if (r < 0) | |
670 | goto fail; | |
671 | else if (r > 0) | |
672 | continue; | |
673 | ||
674 | r = parse_address_key(p, "path", &path); | |
675 | if (r < 0) | |
676 | goto fail; | |
677 | else if (r > 0) | |
678 | continue; | |
679 | ||
680 | if (startswith(*p, "argv")) { | |
681 | unsigned ul; | |
682 | ||
683 | errno = 0; | |
684 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 685 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
686 | r = -EINVAL; |
687 | goto fail; | |
688 | } | |
689 | ||
690 | (*p) ++; | |
691 | ||
692 | if (ul >= n_argv) { | |
821e0756 | 693 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
694 | r = -ENOMEM; |
695 | goto fail; | |
696 | } | |
697 | ||
2fd9ae2e LP |
698 | n_argv = ul + 1; |
699 | } | |
700 | ||
701 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 702 | if (r < 0) |
2fd9ae2e | 703 | goto fail; |
de1c301e | 704 | |
2fd9ae2e | 705 | continue; |
de1c301e LP |
706 | } |
707 | ||
2fd9ae2e LP |
708 | skip_address_key(p); |
709 | } | |
de1c301e | 710 | |
5a0f6033 LP |
711 | if (!path) { |
712 | r = -EINVAL; | |
2fd9ae2e | 713 | goto fail; |
5a0f6033 | 714 | } |
de1c301e | 715 | |
2fd9ae2e LP |
716 | /* Make sure there are no holes in the array, with the |
717 | * exception of argv[0] */ | |
718 | for (j = 1; j < n_argv; j++) | |
719 | if (!argv[j]) { | |
720 | r = -EINVAL; | |
721 | goto fail; | |
722 | } | |
723 | ||
724 | if (argv && argv[0] == NULL) { | |
725 | argv[0] = strdup(path); | |
726 | if (!argv[0]) { | |
727 | r = -ENOMEM; | |
728 | goto fail; | |
729 | } | |
730 | } | |
de1c301e | 731 | |
2fd9ae2e LP |
732 | b->exec_path = path; |
733 | b->exec_argv = argv; | |
734 | return 0; | |
de1c301e | 735 | |
2fd9ae2e LP |
736 | fail: |
737 | for (j = 0; j < n_argv; j++) | |
738 | free(argv[j]); | |
739 | ||
740 | free(argv); | |
741 | free(path); | |
742 | return r; | |
743 | } | |
744 | ||
6629161f LP |
745 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
746 | _cleanup_free_ char *path = NULL; | |
747 | int r; | |
748 | ||
749 | assert(b); | |
750 | assert(p); | |
751 | assert(*p); | |
752 | assert(guid); | |
753 | ||
754 | while (**p != 0 && **p != ';') { | |
755 | r = parse_address_key(p, "guid", guid); | |
756 | if (r < 0) | |
757 | return r; | |
758 | else if (r > 0) | |
759 | continue; | |
760 | ||
761 | r = parse_address_key(p, "path", &path); | |
762 | if (r < 0) | |
763 | return r; | |
764 | else if (r > 0) | |
765 | continue; | |
766 | ||
767 | skip_address_key(p); | |
768 | } | |
769 | ||
770 | if (!path) | |
771 | return -EINVAL; | |
772 | ||
773 | free(b->kernel); | |
774 | b->kernel = path; | |
775 | path = NULL; | |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
bc9fd78c | 780 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 781 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
a7893c6b LP |
782 | int r; |
783 | ||
784 | assert(b); | |
785 | assert(p); | |
786 | assert(*p); | |
787 | assert(guid); | |
788 | ||
789 | while (**p != 0 && **p != ';') { | |
790 | r = parse_address_key(p, "guid", guid); | |
791 | if (r < 0) | |
792 | return r; | |
793 | else if (r > 0) | |
794 | continue; | |
795 | ||
796 | r = parse_address_key(p, "machine", &machine); | |
797 | if (r < 0) | |
798 | return r; | |
799 | else if (r > 0) | |
800 | continue; | |
801 | ||
ee502e0c LP |
802 | r = parse_address_key(p, "pid", &pid); |
803 | if (r < 0) | |
804 | return r; | |
805 | else if (r > 0) | |
806 | continue; | |
807 | ||
a7893c6b LP |
808 | skip_address_key(p); |
809 | } | |
810 | ||
ee502e0c | 811 | if (!machine == !pid) |
a7893c6b LP |
812 | return -EINVAL; |
813 | ||
ee502e0c LP |
814 | if (machine) { |
815 | if (!machine_name_is_valid(machine)) | |
816 | return -EINVAL; | |
b6741478 | 817 | |
ee502e0c LP |
818 | free(b->machine); |
819 | b->machine = machine; | |
820 | machine = NULL; | |
821 | } else { | |
822 | free(b->machine); | |
823 | b->machine = NULL; | |
824 | } | |
825 | ||
826 | if (pid) { | |
827 | r = parse_pid(pid, &b->nspid); | |
828 | if (r < 0) | |
829 | return r; | |
830 | } else | |
831 | b->nspid = 0; | |
a7893c6b LP |
832 | |
833 | b->sockaddr.un.sun_family = AF_UNIX; | |
df1e0204 LP |
834 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); |
835 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + strlen("/var/run/dbus/system_bus_socket"); | |
a7893c6b LP |
836 | |
837 | return 0; | |
838 | } | |
839 | ||
bc9fd78c | 840 | static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 841 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
bc9fd78c LP |
842 | int r; |
843 | ||
844 | assert(b); | |
845 | assert(p); | |
846 | assert(*p); | |
847 | assert(guid); | |
848 | ||
849 | while (**p != 0 && **p != ';') { | |
850 | r = parse_address_key(p, "guid", guid); | |
851 | if (r < 0) | |
852 | return r; | |
853 | else if (r > 0) | |
854 | continue; | |
855 | ||
856 | r = parse_address_key(p, "machine", &machine); | |
857 | if (r < 0) | |
858 | return r; | |
859 | else if (r > 0) | |
860 | continue; | |
861 | ||
ee502e0c LP |
862 | r = parse_address_key(p, "pid", &pid); |
863 | if (r < 0) | |
864 | return r; | |
865 | else if (r > 0) | |
866 | continue; | |
867 | ||
bc9fd78c LP |
868 | skip_address_key(p); |
869 | } | |
870 | ||
ee502e0c | 871 | if (!machine == !pid) |
bc9fd78c LP |
872 | return -EINVAL; |
873 | ||
ee502e0c LP |
874 | if (machine) { |
875 | if (!machine_name_is_valid(machine)) | |
876 | return -EINVAL; | |
bc9fd78c | 877 | |
ee502e0c LP |
878 | free(b->machine); |
879 | b->machine = machine; | |
880 | machine = NULL; | |
881 | } else { | |
882 | free(b->machine); | |
883 | b->machine = NULL; | |
884 | } | |
885 | ||
886 | if (pid) { | |
887 | r = parse_pid(pid, &b->nspid); | |
888 | if (r < 0) | |
889 | return r; | |
890 | } else | |
891 | b->nspid = 0; | |
bc9fd78c | 892 | |
2fc09a9c DM |
893 | r = free_and_strdup(&b->kernel, "/sys/fs/kdbus/0-system/bus"); |
894 | if (r < 0) | |
895 | return r; | |
bc9fd78c LP |
896 | |
897 | return 0; | |
898 | } | |
899 | ||
2fd9ae2e LP |
900 | static void bus_reset_parsed_address(sd_bus *b) { |
901 | assert(b); | |
902 | ||
903 | zero(b->sockaddr); | |
904 | b->sockaddr_size = 0; | |
ba243e51 NK |
905 | b->exec_argv = strv_free(b->exec_argv); |
906 | b->exec_path = mfree(b->exec_path); | |
98178d39 | 907 | b->server_id = SD_ID128_NULL; |
ba243e51 NK |
908 | b->kernel = mfree(b->kernel); |
909 | b->machine = mfree(b->machine); | |
ee502e0c | 910 | b->nspid = 0; |
2fd9ae2e LP |
911 | } |
912 | ||
913 | static int bus_parse_next_address(sd_bus *b) { | |
914 | _cleanup_free_ char *guid = NULL; | |
915 | const char *a; | |
916 | int r; | |
917 | ||
918 | assert(b); | |
919 | ||
920 | if (!b->address) | |
921 | return 0; | |
922 | if (b->address[b->address_index] == 0) | |
923 | return 0; | |
924 | ||
925 | bus_reset_parsed_address(b); | |
926 | ||
927 | a = b->address + b->address_index; | |
de1c301e | 928 | |
2fd9ae2e | 929 | while (*a != 0) { |
de1c301e | 930 | |
2fd9ae2e LP |
931 | if (*a == ';') { |
932 | a++; | |
933 | continue; | |
de1c301e LP |
934 | } |
935 | ||
2fd9ae2e LP |
936 | if (startswith(a, "unix:")) { |
937 | a += 5; | |
de1c301e | 938 | |
2fd9ae2e | 939 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
940 | if (r < 0) |
941 | return r; | |
2fd9ae2e | 942 | break; |
de1c301e | 943 | |
2fd9ae2e | 944 | } else if (startswith(a, "tcp:")) { |
de1c301e | 945 | |
2fd9ae2e LP |
946 | a += 4; |
947 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
948 | if (r < 0) |
949 | return r; | |
de1c301e | 950 | |
2fd9ae2e LP |
951 | break; |
952 | ||
953 | } else if (startswith(a, "unixexec:")) { | |
954 | ||
955 | a += 9; | |
956 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
957 | if (r < 0) |
958 | return r; | |
de1c301e | 959 | |
2fd9ae2e | 960 | break; |
de1c301e | 961 | |
6629161f LP |
962 | } else if (startswith(a, "kernel:")) { |
963 | ||
964 | a += 7; | |
965 | r = parse_kernel_address(b, &a, &guid); | |
966 | if (r < 0) | |
967 | return r; | |
968 | ||
a7893c6b | 969 | break; |
de33fc62 | 970 | } else if (startswith(a, "x-machine-unix:")) { |
bc9fd78c | 971 | |
146d4773 | 972 | a += 15; |
bc9fd78c LP |
973 | r = parse_container_unix_address(b, &a, &guid); |
974 | if (r < 0) | |
975 | return r; | |
976 | ||
977 | break; | |
de33fc62 | 978 | } else if (startswith(a, "x-machine-kernel:")) { |
a7893c6b | 979 | |
146d4773 | 980 | a += 17; |
bc9fd78c | 981 | r = parse_container_kernel_address(b, &a, &guid); |
a7893c6b LP |
982 | if (r < 0) |
983 | return r; | |
984 | ||
6629161f | 985 | break; |
de1c301e LP |
986 | } |
987 | ||
2fd9ae2e LP |
988 | a = strchr(a, ';'); |
989 | if (!a) | |
990 | return 0; | |
de1c301e LP |
991 | } |
992 | ||
993 | if (guid) { | |
98178d39 | 994 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
995 | if (r < 0) |
996 | return r; | |
997 | } | |
998 | ||
2fd9ae2e | 999 | b->address_index = a - b->address; |
de1c301e LP |
1000 | return 1; |
1001 | } | |
1002 | ||
a7e3212d | 1003 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
1004 | int r; |
1005 | ||
1006 | assert(b); | |
1007 | ||
1008 | for (;;) { | |
1e05d493 | 1009 | bool skipped = false; |
2fd9ae2e | 1010 | |
1e05d493 | 1011 | bus_close_fds(b); |
a7e3212d | 1012 | |
1e05d493 | 1013 | if (b->exec_path) |
a7893c6b | 1014 | r = bus_socket_exec(b); |
ee502e0c | 1015 | else if ((b->nspid > 0 || b->machine) && b->kernel) |
bc9fd78c | 1016 | r = bus_container_connect_kernel(b); |
ee502e0c | 1017 | else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC) |
bc9fd78c | 1018 | r = bus_container_connect_socket(b); |
1e05d493 | 1019 | else if (b->kernel) |
a7893c6b | 1020 | r = bus_kernel_connect(b); |
1e05d493 | 1021 | else if (b->sockaddr.sa.sa_family != AF_UNSPEC) |
a7893c6b | 1022 | r = bus_socket_connect(b); |
1e05d493 LP |
1023 | else |
1024 | skipped = true; | |
1025 | ||
1026 | if (!skipped) { | |
1027 | if (r >= 0) { | |
1028 | r = attach_io_events(b); | |
1029 | if (r >= 0) | |
1030 | return r; | |
1031 | } | |
6629161f | 1032 | |
2fd9ae2e LP |
1033 | b->last_connect_error = -r; |
1034 | } | |
1035 | ||
1036 | r = bus_parse_next_address(b); | |
1037 | if (r < 0) | |
1038 | return r; | |
1039 | if (r == 0) | |
1040 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
1041 | } |
1042 | } | |
1043 | ||
a7e3212d LP |
1044 | int bus_next_address(sd_bus *b) { |
1045 | assert(b); | |
1046 | ||
1047 | bus_reset_parsed_address(b); | |
1048 | return bus_start_address(b); | |
1049 | } | |
1050 | ||
021a1e78 | 1051 | static int bus_start_fd(sd_bus *b) { |
6629161f | 1052 | struct stat st; |
021a1e78 LP |
1053 | int r; |
1054 | ||
1055 | assert(b); | |
e82c9509 LP |
1056 | assert(b->input_fd >= 0); |
1057 | assert(b->output_fd >= 0); | |
021a1e78 | 1058 | |
e82c9509 | 1059 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
1060 | if (r < 0) |
1061 | return r; | |
1062 | ||
e82c9509 | 1063 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
1064 | if (r < 0) |
1065 | return r; | |
1066 | ||
e82c9509 LP |
1067 | if (b->input_fd != b->output_fd) { |
1068 | r = fd_nonblock(b->output_fd, true); | |
1069 | if (r < 0) | |
1070 | return r; | |
1071 | ||
1072 | r = fd_cloexec(b->output_fd, true); | |
1073 | if (r < 0) | |
1074 | return r; | |
1075 | } | |
1076 | ||
6629161f LP |
1077 | if (fstat(b->input_fd, &st) < 0) |
1078 | return -errno; | |
1079 | ||
1080 | if (S_ISCHR(b->input_fd)) | |
1081 | return bus_kernel_take_fd(b); | |
1082 | else | |
1083 | return bus_socket_take_fd(b); | |
021a1e78 LP |
1084 | } |
1085 | ||
d9f644e2 | 1086 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1087 | int r; |
1088 | ||
d6888822 LP |
1089 | assert_return(bus, -EINVAL); |
1090 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
1091 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1092 | |
1093 | bus->state = BUS_OPENING; | |
1094 | ||
2181a7f5 LP |
1095 | if (bus->is_server && bus->bus_client) |
1096 | return -EINVAL; | |
1097 | ||
e82c9509 | 1098 | if (bus->input_fd >= 0) |
021a1e78 | 1099 | r = bus_start_fd(bus); |
a7893c6b | 1100 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 1101 | r = bus_start_address(bus); |
021a1e78 LP |
1102 | else |
1103 | return -EINVAL; | |
1104 | ||
db9bb83f LP |
1105 | if (r < 0) { |
1106 | sd_bus_close(bus); | |
021a1e78 | 1107 | return r; |
db9bb83f | 1108 | } |
021a1e78 LP |
1109 | |
1110 | return bus_send_hello(bus); | |
1111 | } | |
1112 | ||
af08d2f9 LP |
1113 | _public_ int sd_bus_open(sd_bus **ret) { |
1114 | const char *e; | |
1115 | sd_bus *b; | |
1116 | int r; | |
1117 | ||
1118 | assert_return(ret, -EINVAL); | |
1119 | ||
1120 | /* Let's connect to the starter bus if it is set, and | |
1121 | * otherwise to the bus that is appropropriate for the scope | |
1122 | * we are running in */ | |
1123 | ||
1124 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1125 | if (e) { | |
1126 | if (streq(e, "system")) | |
1127 | return sd_bus_open_system(ret); | |
09365592 | 1128 | else if (STR_IN_SET(e, "session", "user")) |
af08d2f9 LP |
1129 | return sd_bus_open_user(ret); |
1130 | } | |
1131 | ||
1132 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1133 | if (!e) { | |
1134 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
1135 | return sd_bus_open_user(ret); | |
1136 | else | |
1137 | return sd_bus_open_system(ret); | |
1138 | } | |
1139 | ||
1140 | r = sd_bus_new(&b); | |
1141 | if (r < 0) | |
1142 | return r; | |
1143 | ||
1144 | r = sd_bus_set_address(b, e); | |
1145 | if (r < 0) | |
1146 | goto fail; | |
1147 | ||
1148 | b->bus_client = true; | |
1149 | ||
1150 | /* We don't know whether the bus is trusted or not, so better | |
1151 | * be safe, and authenticate everything */ | |
1152 | b->trusted = false; | |
cf226cfc LP |
1153 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; |
1154 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; | |
af08d2f9 LP |
1155 | |
1156 | r = sd_bus_start(b); | |
1157 | if (r < 0) | |
1158 | goto fail; | |
1159 | ||
1160 | *ret = b; | |
1161 | return 0; | |
1162 | ||
1163 | fail: | |
1164 | bus_free(b); | |
1165 | return r; | |
1166 | } | |
1167 | ||
09365592 | 1168 | int bus_set_address_system(sd_bus *b) { |
de1c301e | 1169 | const char *e; |
09365592 LP |
1170 | assert(b); |
1171 | ||
1172 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
1173 | if (e) | |
1174 | return sd_bus_set_address(b, e); | |
1175 | ||
e3afaf6b | 1176 | return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_ADDRESS); |
09365592 LP |
1177 | } |
1178 | ||
1179 | _public_ int sd_bus_open_system(sd_bus **ret) { | |
de1c301e LP |
1180 | sd_bus *b; |
1181 | int r; | |
1182 | ||
d6888822 | 1183 | assert_return(ret, -EINVAL); |
de1c301e | 1184 | |
021a1e78 LP |
1185 | r = sd_bus_new(&b); |
1186 | if (r < 0) | |
1187 | return r; | |
1188 | ||
09365592 | 1189 | r = bus_set_address_system(b); |
e3dd987c LP |
1190 | if (r < 0) |
1191 | goto fail; | |
de1c301e | 1192 | |
94bbf1ba | 1193 | b->bus_client = true; |
5972fe95 | 1194 | b->is_system = true; |
021a1e78 | 1195 | |
adacb957 LP |
1196 | /* Let's do per-method access control on the system bus. We |
1197 | * need the caller's UID and capability set for that. */ | |
1198 | b->trusted = false; | |
1199 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
cf226cfc | 1200 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
adacb957 | 1201 | |
021a1e78 LP |
1202 | r = sd_bus_start(b); |
1203 | if (r < 0) | |
1204 | goto fail; | |
de1c301e LP |
1205 | |
1206 | *ret = b; | |
1207 | return 0; | |
021a1e78 LP |
1208 | |
1209 | fail: | |
1210 | bus_free(b); | |
1211 | return r; | |
de1c301e LP |
1212 | } |
1213 | ||
09365592 | 1214 | int bus_set_address_user(sd_bus *b) { |
de1c301e | 1215 | const char *e; |
de1c301e | 1216 | |
09365592 | 1217 | assert(b); |
021a1e78 | 1218 | |
6c03089c | 1219 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
09365592 LP |
1220 | if (e) |
1221 | return sd_bus_set_address(b, e); | |
1222 | ||
1223 | e = secure_getenv("XDG_RUNTIME_DIR"); | |
de1c301e | 1224 | if (e) { |
09365592 | 1225 | _cleanup_free_ char *ee = NULL; |
e3dd987c | 1226 | |
09365592 LP |
1227 | ee = bus_address_escape(e); |
1228 | if (!ee) | |
1229 | return -ENOMEM; | |
e3dd987c | 1230 | |
e3afaf6b | 1231 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT, getuid(), ee); |
1b09f548 | 1232 | } else |
e3afaf6b | 1233 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid()); |
de1c301e | 1234 | |
09365592 LP |
1235 | if (!b->address) |
1236 | return -ENOMEM; | |
1237 | ||
1238 | return 0; | |
1239 | } | |
1240 | ||
1241 | _public_ int sd_bus_open_user(sd_bus **ret) { | |
1242 | sd_bus *b; | |
1243 | int r; | |
1244 | ||
1245 | assert_return(ret, -EINVAL); | |
1246 | ||
1247 | r = sd_bus_new(&b); | |
1248 | if (r < 0) | |
1249 | return r; | |
1250 | ||
1251 | r = bus_set_address_user(b); | |
1252 | if (r < 0) | |
1253 | return r; | |
1254 | ||
94bbf1ba | 1255 | b->bus_client = true; |
5972fe95 | 1256 | b->is_user = true; |
de1c301e | 1257 | |
adacb957 LP |
1258 | /* We don't do any per-method access control on the user |
1259 | * bus. */ | |
1260 | b->trusted = true; | |
1261 | ||
021a1e78 | 1262 | r = sd_bus_start(b); |
2571ead1 LP |
1263 | if (r < 0) |
1264 | goto fail; | |
de1c301e LP |
1265 | |
1266 | *ret = b; | |
1267 | return 0; | |
2571ead1 LP |
1268 | |
1269 | fail: | |
021a1e78 | 1270 | bus_free(b); |
2571ead1 | 1271 | return r; |
de1c301e LP |
1272 | } |
1273 | ||
09365592 | 1274 | int bus_set_address_system_remote(sd_bus *b, const char *host) { |
0f8bd8de | 1275 | _cleanup_free_ char *e = NULL; |
7f0d207d | 1276 | char *m = NULL, *c = NULL; |
0f8bd8de | 1277 | |
09365592 LP |
1278 | assert(b); |
1279 | assert(host); | |
0f8bd8de | 1280 | |
7f0d207d LP |
1281 | /* Let's see if we shall enter some container */ |
1282 | m = strchr(host, ':'); | |
1283 | if (m) { | |
1284 | m++; | |
1285 | ||
1286 | /* Let's make sure this is not a port of some kind, | |
1287 | * and is a valid machine name. */ | |
1288 | if (!in_charset(m, "0123456789") && machine_name_is_valid(m)) { | |
1289 | char *t; | |
1290 | ||
1291 | /* Cut out the host part */ | |
1292 | t = strndupa(host, m - host - 1); | |
1293 | e = bus_address_escape(t); | |
1294 | if (!e) | |
1295 | return -ENOMEM; | |
1296 | ||
63c372cb | 1297 | c = strjoina(",argv4=--machine=", m); |
7f0d207d LP |
1298 | } |
1299 | } | |
1300 | ||
1301 | if (!e) { | |
1302 | e = bus_address_escape(host); | |
1303 | if (!e) | |
1304 | return -ENOMEM; | |
1305 | } | |
0f8bd8de | 1306 | |
7f0d207d | 1307 | b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c, NULL); |
09365592 | 1308 | if (!b->address) |
0f8bd8de | 1309 | return -ENOMEM; |
a7893c6b | 1310 | |
09365592 LP |
1311 | return 0; |
1312 | } | |
1313 | ||
1314 | _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) { | |
1315 | sd_bus *bus; | |
1316 | int r; | |
1317 | ||
1318 | assert_return(host, -EINVAL); | |
1319 | assert_return(ret, -EINVAL); | |
1320 | ||
a7893c6b | 1321 | r = sd_bus_new(&bus); |
09365592 | 1322 | if (r < 0) |
a7893c6b | 1323 | return r; |
a7893c6b | 1324 | |
09365592 LP |
1325 | r = bus_set_address_system_remote(bus, host); |
1326 | if (r < 0) | |
1327 | goto fail; | |
1328 | ||
a7893c6b | 1329 | bus->bus_client = true; |
09365592 | 1330 | bus->trusted = false; |
3acc1daf | 1331 | bus->is_system = true; |
a7893c6b LP |
1332 | |
1333 | r = sd_bus_start(bus); | |
09365592 LP |
1334 | if (r < 0) |
1335 | goto fail; | |
a7893c6b LP |
1336 | |
1337 | *ret = bus; | |
1338 | return 0; | |
09365592 LP |
1339 | |
1340 | fail: | |
1341 | bus_free(bus); | |
1342 | return r; | |
a7893c6b LP |
1343 | } |
1344 | ||
de33fc62 | 1345 | int bus_set_address_system_machine(sd_bus *b, const char *machine) { |
a7893c6b | 1346 | _cleanup_free_ char *e = NULL; |
a7893c6b | 1347 | |
09365592 LP |
1348 | assert(b); |
1349 | assert(machine); | |
a7893c6b LP |
1350 | |
1351 | e = bus_address_escape(machine); | |
1352 | if (!e) | |
1353 | return -ENOMEM; | |
1354 | ||
de33fc62 | 1355 | b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL); |
09365592 | 1356 | if (!b->address) |
a7893c6b | 1357 | return -ENOMEM; |
0f8bd8de | 1358 | |
09365592 LP |
1359 | return 0; |
1360 | } | |
1361 | ||
de33fc62 | 1362 | _public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) { |
09365592 LP |
1363 | sd_bus *bus; |
1364 | int r; | |
1365 | ||
1366 | assert_return(machine, -EINVAL); | |
1367 | assert_return(ret, -EINVAL); | |
affcf189 | 1368 | assert_return(machine_name_is_valid(machine), -EINVAL); |
09365592 | 1369 | |
0f8bd8de | 1370 | r = sd_bus_new(&bus); |
09365592 | 1371 | if (r < 0) |
0f8bd8de | 1372 | return r; |
0f8bd8de | 1373 | |
de33fc62 | 1374 | r = bus_set_address_system_machine(bus, machine); |
09365592 LP |
1375 | if (r < 0) |
1376 | goto fail; | |
1377 | ||
0f8bd8de | 1378 | bus->bus_client = true; |
09365592 | 1379 | bus->trusted = false; |
3acc1daf | 1380 | bus->is_system = true; |
0f8bd8de LP |
1381 | |
1382 | r = sd_bus_start(bus); | |
09365592 LP |
1383 | if (r < 0) |
1384 | goto fail; | |
0f8bd8de LP |
1385 | |
1386 | *ret = bus; | |
1387 | return 0; | |
09365592 LP |
1388 | |
1389 | fail: | |
1390 | bus_free(bus); | |
1391 | return r; | |
0f8bd8de LP |
1392 | } |
1393 | ||
d9f644e2 | 1394 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1395 | |
de1c301e LP |
1396 | if (!bus) |
1397 | return; | |
d5a2b9a6 LP |
1398 | if (bus->state == BUS_CLOSED) |
1399 | return; | |
1400 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1401 | return; |
1402 | ||
1403 | bus->state = BUS_CLOSED; | |
e82c9509 | 1404 | |
40ca29a1 LP |
1405 | sd_bus_detach_event(bus); |
1406 | ||
0e586eae LP |
1407 | /* Drop all queued messages so that they drop references to |
1408 | * the bus object and the bus may be freed */ | |
1409 | bus_reset_queues(bus); | |
1410 | ||
f54514f3 LP |
1411 | if (!bus->is_kernel) |
1412 | bus_close_fds(bus); | |
1413 | ||
1414 | /* We'll leave the fd open in case this is a kernel bus, since | |
1415 | * there might still be memblocks around that reference this | |
cd6d5e1c | 1416 | * bus, and they might need to invoke the KDBUS_CMD_FREE |
1d0e3c98 | 1417 | * ioctl on the fd when they are freed. */ |
de1c301e LP |
1418 | } |
1419 | ||
03976f7b LP |
1420 | _public_ sd_bus* sd_bus_flush_close_unref(sd_bus *bus) { |
1421 | ||
1422 | if (!bus) | |
1423 | return NULL; | |
1424 | ||
1425 | sd_bus_flush(bus); | |
1426 | sd_bus_close(bus); | |
1427 | ||
1428 | return sd_bus_unref(bus); | |
1429 | } | |
1430 | ||
718db961 LP |
1431 | static void bus_enter_closing(sd_bus *bus) { |
1432 | assert(bus); | |
1433 | ||
1434 | if (bus->state != BUS_OPENING && | |
1435 | bus->state != BUS_AUTHENTICATING && | |
1436 | bus->state != BUS_HELLO && | |
1437 | bus->state != BUS_RUNNING) | |
1438 | return; | |
1439 | ||
1440 | bus->state = BUS_CLOSING; | |
1441 | } | |
1442 | ||
d9f644e2 | 1443 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
9d6c7c82 | 1444 | assert_return(bus, NULL); |
de1c301e | 1445 | |
e4ee6e5c | 1446 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1447 | |
de1c301e LP |
1448 | return bus; |
1449 | } | |
1450 | ||
d9f644e2 | 1451 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1452 | unsigned i; |
5b1bc83f LP |
1453 | |
1454 | if (!bus) | |
1455 | return NULL; | |
de1c301e | 1456 | |
f389bf15 LP |
1457 | i = REFCNT_DEC(bus->n_ref); |
1458 | if (i > 0) | |
1459 | return NULL; | |
1460 | ||
1461 | bus_free(bus); | |
de1c301e LP |
1462 | return NULL; |
1463 | } | |
1464 | ||
d9f644e2 | 1465 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1466 | |
1467 | assert_return(bus, -EINVAL); | |
1468 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1469 | |
f54514f3 | 1470 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1471 | } |
1472 | ||
d9f644e2 | 1473 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1474 | int r; |
1475 | ||
d6888822 LP |
1476 | assert_return(bus, -EINVAL); |
1477 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1478 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1479 | |
09365592 LP |
1480 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1481 | return 0; | |
1482 | ||
d728d708 | 1483 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1484 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1485 | return 0; |
1486 | ||
20902f3e | 1487 | r = bus_ensure_running(bus); |
d728d708 LP |
1488 | if (r < 0) |
1489 | return r; | |
de1c301e | 1490 | |
d728d708 LP |
1491 | return bus->can_fds; |
1492 | } | |
1493 | ||
1494 | return bus_type_is_valid(type); | |
de1c301e LP |
1495 | } |
1496 | ||
5c302692 | 1497 | _public_ int sd_bus_get_bus_id(sd_bus *bus, sd_id128_t *id) { |
d728d708 | 1498 | int r; |
de1c301e | 1499 | |
d6888822 | 1500 | assert_return(bus, -EINVAL); |
f7fce345 | 1501 | assert_return(id, -EINVAL); |
d6888822 | 1502 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1503 | |
20902f3e | 1504 | r = bus_ensure_running(bus); |
d728d708 LP |
1505 | if (r < 0) |
1506 | return r; | |
de1c301e | 1507 | |
f7fce345 | 1508 | *id = bus->server_id; |
d728d708 | 1509 | return 0; |
de1c301e LP |
1510 | } |
1511 | ||
3df7a7e6 | 1512 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
7adc46fc | 1513 | assert(b); |
de1c301e LP |
1514 | assert(m); |
1515 | ||
aea93deb LP |
1516 | if (m->sealed) { |
1517 | /* If we copy the same message to multiple | |
693eb9a2 | 1518 | * destinations, avoid using the same cookie |
aea93deb | 1519 | * numbers. */ |
693eb9a2 | 1520 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1521 | return 0; |
aea93deb | 1522 | } |
de1c301e | 1523 | |
3df7a7e6 LP |
1524 | if (timeout == 0) |
1525 | timeout = BUS_DEFAULT_TIMEOUT; | |
1526 | ||
693eb9a2 | 1527 | return bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1528 | } |
1529 | ||
e1c433c6 | 1530 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
908b8a42 DH |
1531 | bool remarshal = false; |
1532 | ||
e1c433c6 LP |
1533 | assert(b); |
1534 | ||
908b8a42 DH |
1535 | /* wrong packet version */ |
1536 | if (b->message_version != 0 && b->message_version != (*m)->header->version) | |
1537 | remarshal = true; | |
1538 | ||
1539 | /* wrong packet endianness */ | |
1540 | if (b->message_endian != 0 && b->message_endian != (*m)->header->endian) | |
1541 | remarshal = true; | |
1542 | ||
1543 | /* TODO: kdbus-messages received from the kernel contain data which is | |
1544 | * not allowed to be passed to KDBUS_CMD_SEND. Therefore, we have to | |
1545 | * force remarshaling of the message. Technically, we could just | |
1546 | * recreate the kdbus message, but that is non-trivial as other parts of | |
1547 | * the message refer to m->kdbus already. This should be fixed! */ | |
1548 | if ((*m)->kdbus && (*m)->release_kdbus) | |
1549 | remarshal = true; | |
e1c433c6 | 1550 | |
908b8a42 | 1551 | return remarshal ? bus_message_remarshal(b, m) : 0; |
e1c433c6 LP |
1552 | } |
1553 | ||
7adc46fc LP |
1554 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1555 | assert(b); | |
1556 | assert(m); | |
1557 | ||
52cd5877 LP |
1558 | /* Fake some timestamps, if they were requested, and not |
1559 | * already initialized */ | |
1560 | if (b->attach_flags & KDBUS_ATTACH_TIMESTAMP) { | |
1561 | if (m->realtime <= 0) | |
1562 | m->realtime = now(CLOCK_REALTIME); | |
1563 | ||
1564 | if (m->monotonic <= 0) | |
1565 | m->monotonic = now(CLOCK_MONOTONIC); | |
1566 | } | |
1567 | ||
7adc46fc LP |
1568 | /* The bus specification says the serial number cannot be 0, |
1569 | * hence let's fill something in for synthetic messages. Since | |
1570 | * synthetic messages might have a fake sender and we don't | |
1571 | * want to interfere with the real sender's serial numbers we | |
6f285378 | 1572 | * pick a fixed, artificial one. We use (uint32_t) -1 rather |
7adc46fc LP |
1573 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, |
1574 | * even though kdbus can do 64bit. */ | |
3df7a7e6 | 1575 | return bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1576 | } |
1577 | ||
069f5e61 | 1578 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call, size_t *idx) { |
2e3db52d LP |
1579 | int r; |
1580 | ||
718db961 | 1581 | assert(bus); |
2e3db52d | 1582 | assert(m); |
718db961 LP |
1583 | |
1584 | if (bus->is_kernel) | |
069f5e61 | 1585 | r = bus_kernel_write_message(bus, m, hint_sync_call); |
718db961 | 1586 | else |
2e3db52d LP |
1587 | r = bus_socket_write_message(bus, m, idx); |
1588 | ||
1589 | if (r <= 0) | |
1590 | return r; | |
1591 | ||
90911bb6 | 1592 | if (bus->is_kernel || *idx >= BUS_MESSAGE_SIZE(m)) |
42c4ebcb | 1593 | log_debug("Sent message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s", |
2e3db52d LP |
1594 | bus_message_type_to_string(m->header->type), |
1595 | strna(sd_bus_message_get_sender(m)), | |
1596 | strna(sd_bus_message_get_destination(m)), | |
1597 | strna(sd_bus_message_get_path(m)), | |
1598 | strna(sd_bus_message_get_interface(m)), | |
1599 | strna(sd_bus_message_get_member(m)), | |
42c4ebcb LP |
1600 | BUS_MESSAGE_COOKIE(m), |
1601 | m->reply_cookie, | |
2e3db52d LP |
1602 | strna(m->error.message)); |
1603 | ||
1604 | return r; | |
718db961 LP |
1605 | } |
1606 | ||
de1c301e | 1607 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1608 | int r, ret = 0; |
de1c301e LP |
1609 | |
1610 | assert(bus); | |
89ffcd2a | 1611 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1612 | |
de1c301e LP |
1613 | while (bus->wqueue_size > 0) { |
1614 | ||
069f5e61 | 1615 | r = bus_write_message(bus, bus->wqueue[0], false, &bus->windex); |
718db961 | 1616 | if (r < 0) |
de1c301e | 1617 | return r; |
718db961 | 1618 | else if (r == 0) |
e3017af9 LP |
1619 | /* Didn't do anything this time */ |
1620 | return ret; | |
6629161f | 1621 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1622 | /* Fully written. Let's drop the entry from |
1623 | * the queue. | |
1624 | * | |
1625 | * This isn't particularly optimized, but | |
1626 | * well, this is supposed to be our worst-case | |
1627 | * buffer only, and the socket buffer is | |
1628 | * supposed to be our primary buffer, and if | |
1629 | * it got full, then all bets are off | |
1630 | * anyway. */ | |
1631 | ||
de1c301e | 1632 | bus->wqueue_size --; |
c4e6e242 | 1633 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1634 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1635 | bus->windex = 0; | |
1636 | ||
e3017af9 | 1637 | ret = 1; |
de1c301e LP |
1638 | } |
1639 | } | |
1640 | ||
e3017af9 | 1641 | return ret; |
de1c301e LP |
1642 | } |
1643 | ||
766c5809 | 1644 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1645 | assert(bus); |
1646 | ||
1647 | if (bus->is_kernel) | |
766c5809 | 1648 | return bus_kernel_read_message(bus, hint_priority, priority); |
7d22c717 LP |
1649 | else |
1650 | return bus_socket_read_message(bus); | |
1651 | } | |
1652 | ||
7adc46fc | 1653 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1654 | assert(bus); |
7d22c717 | 1655 | |
821e0756 | 1656 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1657 | return -ENOBUFS; |
1658 | ||
821e0756 | 1659 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1660 | return -ENOMEM; |
1661 | ||
7d22c717 LP |
1662 | return 0; |
1663 | } | |
1664 | ||
766c5809 | 1665 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1666 | int r, ret = 0; |
de1c301e LP |
1667 | |
1668 | assert(bus); | |
1669 | assert(m); | |
89ffcd2a | 1670 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1671 | |
766c5809 LP |
1672 | /* Note that the priority logic is only available on kdbus, |
1673 | * where the rqueue is unused. We check the rqueue here | |
1674 | * anyway, because it's simple... */ | |
1675 | ||
7d22c717 LP |
1676 | for (;;) { |
1677 | if (bus->rqueue_size > 0) { | |
1678 | /* Dispatch a queued message */ | |
de1c301e | 1679 | |
7d22c717 LP |
1680 | *m = bus->rqueue[0]; |
1681 | bus->rqueue_size --; | |
1682 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1683 | return 1; | |
1684 | } | |
de1c301e | 1685 | |
7d22c717 | 1686 | /* Try to read a new message */ |
766c5809 | 1687 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1688 | if (r < 0) |
e3017af9 | 1689 | return r; |
e3017af9 LP |
1690 | if (r == 0) |
1691 | return ret; | |
de1c301e | 1692 | |
2e8d788c | 1693 | ret = 1; |
7d22c717 | 1694 | } |
de1c301e LP |
1695 | } |
1696 | ||
069f5e61 | 1697 | static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, bool hint_sync_call) { |
e1c433c6 | 1698 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1699 | int r; |
1700 | ||
d6888822 | 1701 | assert_return(m, -EINVAL); |
9030ca46 LP |
1702 | |
1703 | if (!bus) | |
1704 | bus = m->bus; | |
1705 | ||
d6888822 | 1706 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1707 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
021a1e78 | 1708 | |
a3d59cd1 LP |
1709 | if (!BUS_IS_OPEN(bus->state)) |
1710 | return -ENOTCONN; | |
1711 | ||
021a1e78 LP |
1712 | if (m->n_fds > 0) { |
1713 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1714 | if (r < 0) | |
1715 | return r; | |
1716 | if (r == 0) | |
15411c0c | 1717 | return -EOPNOTSUPP; |
021a1e78 | 1718 | } |
de1c301e | 1719 | |
693eb9a2 | 1720 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1721 | * is expected */ |
693eb9a2 | 1722 | if (!cookie && !m->sealed) |
0461f8cd | 1723 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1724 | |
3df7a7e6 | 1725 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1726 | if (r < 0) |
1727 | return r; | |
1728 | ||
441d56a1 | 1729 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1730 | * message and place a replacement in m */ |
1731 | r = bus_remarshal_message(bus, &m); | |
1732 | if (r < 0) | |
1733 | return r; | |
1734 | ||
5407f2de LP |
1735 | /* If this is a reply and no reply was requested, then let's |
1736 | * suppress this, if we can */ | |
997eadb5 LP |
1737 | if (m->dont_send) |
1738 | goto finish; | |
5407f2de | 1739 | |
89ffcd2a | 1740 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1741 | size_t idx = 0; |
1742 | ||
069f5e61 | 1743 | r = bus_write_message(bus, m, hint_sync_call, &idx); |
32f46480 | 1744 | if (r < 0) { |
441d56a1 | 1745 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1746 | bus_enter_closing(bus); |
441d56a1 LP |
1747 | return -ECONNRESET; |
1748 | } | |
32f46480 | 1749 | |
de1c301e | 1750 | return r; |
997eadb5 LP |
1751 | } |
1752 | ||
1753 | if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { | |
de1c301e LP |
1754 | /* Wasn't fully written. So let's remember how |
1755 | * much was written. Note that the first entry | |
1756 | * of the wqueue array is always allocated so | |
1757 | * that we always can remember how much was | |
1758 | * written. */ | |
1759 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1760 | bus->wqueue_size = 1; | |
1761 | bus->windex = idx; | |
1762 | } | |
997eadb5 | 1763 | |
de1c301e | 1764 | } else { |
de1c301e LP |
1765 | /* Just append it to the queue. */ |
1766 | ||
25220239 | 1767 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1768 | return -ENOBUFS; |
1769 | ||
821e0756 | 1770 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1771 | return -ENOMEM; |
1772 | ||
821e0756 | 1773 | bus->wqueue[bus->wqueue_size ++] = sd_bus_message_ref(m); |
de1c301e LP |
1774 | } |
1775 | ||
997eadb5 | 1776 | finish: |
693eb9a2 LP |
1777 | if (cookie) |
1778 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1779 | |
7a37d625 | 1780 | return 1; |
de1c301e LP |
1781 | } |
1782 | ||
069f5e61 LP |
1783 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *cookie) { |
1784 | return bus_send_internal(bus, m, cookie, false); | |
1785 | } | |
1786 | ||
693eb9a2 | 1787 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1788 | int r; |
1789 | ||
911121a7 | 1790 | assert_return(m, -EINVAL); |
9030ca46 LP |
1791 | |
1792 | if (!bus) | |
1793 | bus = m->bus; | |
1794 | ||
911121a7 LP |
1795 | assert_return(!bus_pid_changed(bus), -ECHILD); |
1796 | ||
a3d59cd1 LP |
1797 | if (!BUS_IS_OPEN(bus->state)) |
1798 | return -ENOTCONN; | |
1799 | ||
911121a7 LP |
1800 | if (!streq_ptr(m->destination, destination)) { |
1801 | ||
1802 | if (!destination) | |
1803 | return -EEXIST; | |
1804 | ||
1805 | r = sd_bus_message_set_destination(m, destination); | |
1806 | if (r < 0) | |
1807 | return r; | |
1808 | } | |
1809 | ||
693eb9a2 | 1810 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1811 | } |
1812 | ||
de1c301e LP |
1813 | static usec_t calc_elapse(uint64_t usec) { |
1814 | if (usec == (uint64_t) -1) | |
1815 | return 0; | |
1816 | ||
de1c301e LP |
1817 | return now(CLOCK_MONOTONIC) + usec; |
1818 | } | |
1819 | ||
e3017af9 LP |
1820 | static int timeout_compare(const void *a, const void *b) { |
1821 | const struct reply_callback *x = a, *y = b; | |
1822 | ||
1823 | if (x->timeout != 0 && y->timeout == 0) | |
1824 | return -1; | |
1825 | ||
1826 | if (x->timeout == 0 && y->timeout != 0) | |
1827 | return 1; | |
1828 | ||
1829 | if (x->timeout < y->timeout) | |
1830 | return -1; | |
1831 | ||
1832 | if (x->timeout > y->timeout) | |
1833 | return 1; | |
1834 | ||
1835 | return 0; | |
1836 | } | |
1837 | ||
c49b30a2 | 1838 | _public_ int sd_bus_call_async( |
de1c301e | 1839 | sd_bus *bus, |
19befb2d | 1840 | sd_bus_slot **slot, |
e1c433c6 | 1841 | sd_bus_message *_m, |
52f3ba91 | 1842 | sd_bus_message_handler_t callback, |
de1c301e | 1843 | void *userdata, |
19befb2d | 1844 | uint64_t usec) { |
de1c301e | 1845 | |
e1c433c6 | 1846 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
19befb2d | 1847 | _cleanup_bus_slot_unref_ sd_bus_slot *s = NULL; |
de1c301e LP |
1848 | int r; |
1849 | ||
d6888822 | 1850 | assert_return(m, -EINVAL); |
40ca29a1 | 1851 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1852 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 | 1853 | assert_return(callback, -EINVAL); |
9030ca46 LP |
1854 | |
1855 | if (!bus) | |
1856 | bus = m->bus; | |
1857 | ||
d6888822 | 1858 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1859 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
89ffcd2a | 1860 | |
a3d59cd1 LP |
1861 | if (!BUS_IS_OPEN(bus->state)) |
1862 | return -ENOTCONN; | |
1863 | ||
c9fe4af7 | 1864 | r = ordered_hashmap_ensure_allocated(&bus->reply_callbacks, &uint64_hash_ops); |
89ffcd2a LP |
1865 | if (r < 0) |
1866 | return r; | |
de1c301e | 1867 | |
3df7a7e6 LP |
1868 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1869 | if (r < 0) | |
1870 | return r; | |
e3017af9 | 1871 | |
3df7a7e6 | 1872 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
1873 | if (r < 0) |
1874 | return r; | |
1875 | ||
e1c433c6 LP |
1876 | r = bus_remarshal_message(bus, &m); |
1877 | if (r < 0) | |
1878 | return r; | |
1879 | ||
19befb2d LP |
1880 | s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata); |
1881 | if (!s) | |
de1c301e LP |
1882 | return -ENOMEM; |
1883 | ||
19befb2d | 1884 | s->reply_callback.callback = callback; |
de1c301e | 1885 | |
19befb2d | 1886 | s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m); |
c9fe4af7 | 1887 | r = ordered_hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback); |
de1c301e | 1888 | if (r < 0) { |
19befb2d | 1889 | s->reply_callback.cookie = 0; |
de1c301e LP |
1890 | return r; |
1891 | } | |
1892 | ||
19befb2d LP |
1893 | s->reply_callback.timeout = calc_elapse(m->timeout); |
1894 | if (s->reply_callback.timeout != 0) { | |
1895 | r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx); | |
e3017af9 | 1896 | if (r < 0) { |
19befb2d | 1897 | s->reply_callback.timeout = 0; |
e3017af9 LP |
1898 | return r; |
1899 | } | |
1900 | } | |
1901 | ||
19befb2d LP |
1902 | r = sd_bus_send(bus, m, &s->reply_callback.cookie); |
1903 | if (r < 0) | |
de1c301e | 1904 | return r; |
de1c301e | 1905 | |
19befb2d LP |
1906 | if (slot) |
1907 | *slot = s; | |
1908 | s = NULL; | |
e3017af9 | 1909 | |
19befb2d | 1910 | return r; |
de1c301e LP |
1911 | } |
1912 | ||
20902f3e | 1913 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1914 | int r; |
1915 | ||
1916 | assert(bus); | |
1917 | ||
718db961 | 1918 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING) |
021a1e78 | 1919 | return -ENOTCONN; |
d728d708 LP |
1920 | if (bus->state == BUS_RUNNING) |
1921 | return 1; | |
89ffcd2a LP |
1922 | |
1923 | for (;;) { | |
1924 | r = sd_bus_process(bus, NULL); | |
1925 | if (r < 0) | |
1926 | return r; | |
d728d708 LP |
1927 | if (bus->state == BUS_RUNNING) |
1928 | return 1; | |
e3017af9 LP |
1929 | if (r > 0) |
1930 | continue; | |
89ffcd2a LP |
1931 | |
1932 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1933 | if (r < 0) | |
1934 | return r; | |
1935 | } | |
1936 | } | |
1937 | ||
97f82db3 | 1938 | _public_ int sd_bus_call( |
de1c301e | 1939 | sd_bus *bus, |
97f82db3 | 1940 | sd_bus_message *_m, |
de1c301e LP |
1941 | uint64_t usec, |
1942 | sd_bus_error *error, | |
1943 | sd_bus_message **reply) { | |
1944 | ||
97f82db3 | 1945 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 1946 | usec_t timeout; |
693eb9a2 | 1947 | uint64_t cookie; |
7d22c717 LP |
1948 | unsigned i; |
1949 | int r; | |
de1c301e | 1950 | |
97f82db3 KS |
1951 | assert_return(m, -EINVAL); |
1952 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); | |
1953 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); | |
1954 | assert_return(!bus_error_is_dirty(error), -EINVAL); | |
9030ca46 LP |
1955 | |
1956 | if (!bus) | |
1957 | bus = m->bus; | |
1958 | ||
97f82db3 | 1959 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1960 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
97f82db3 | 1961 | |
a3d59cd1 LP |
1962 | if (!BUS_IS_OPEN(bus->state)) |
1963 | return -ENOTCONN; | |
1964 | ||
97f82db3 KS |
1965 | r = bus_ensure_running(bus); |
1966 | if (r < 0) | |
1967 | return r; | |
1968 | ||
a43b9ca3 | 1969 | i = bus->rqueue_size; |
97f82db3 KS |
1970 | |
1971 | r = bus_seal_message(bus, m, usec); | |
1972 | if (r < 0) | |
1973 | return r; | |
1974 | ||
1975 | r = bus_remarshal_message(bus, &m); | |
1976 | if (r < 0) | |
1977 | return r; | |
1978 | ||
069f5e61 | 1979 | r = bus_send_internal(bus, m, &cookie, true); |
de1c301e LP |
1980 | if (r < 0) |
1981 | return r; | |
1982 | ||
3df7a7e6 | 1983 | timeout = calc_elapse(m->timeout); |
de1c301e LP |
1984 | |
1985 | for (;;) { | |
1986 | usec_t left; | |
de1c301e | 1987 | |
7d22c717 LP |
1988 | while (i < bus->rqueue_size) { |
1989 | sd_bus_message *incoming = NULL; | |
1990 | ||
1991 | incoming = bus->rqueue[i]; | |
89ffcd2a | 1992 | |
693eb9a2 | 1993 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
1994 | /* Found a match! */ |
1995 | ||
7d22c717 LP |
1996 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1997 | bus->rqueue_size--; | |
f9f97ca6 | 1998 | log_debug_bus_message(incoming); |
7d22c717 | 1999 | |
40ca29a1 | 2000 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 | 2001 | |
2ce97e2b LP |
2002 | if (incoming->n_fds <= 0 || (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2003 | if (reply) | |
2004 | *reply = incoming; | |
2005 | else | |
2006 | sd_bus_message_unref(incoming); | |
2007 | ||
2008 | return 1; | |
2009 | } | |
2010 | ||
2011 | r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); | |
b7f247e0 | 2012 | |
a43b9ca3 | 2013 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) |
de1c301e | 2014 | r = sd_bus_error_copy(error, &incoming->error); |
a43b9ca3 LP |
2015 | else |
2016 | r = -EIO; | |
de1c301e LP |
2017 | |
2018 | sd_bus_message_unref(incoming); | |
a43b9ca3 | 2019 | return r; |
a8a07f89 | 2020 | |
693eb9a2 | 2021 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
2022 | bus->unique_name && |
2023 | incoming->sender && | |
2024 | streq(bus->unique_name, incoming->sender)) { | |
2025 | ||
7d22c717 LP |
2026 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2027 | bus->rqueue_size--; | |
2028 | ||
a8a07f89 LP |
2029 | /* Our own message? Somebody is trying |
2030 | * to send its own client a message, | |
2031 | * let's not dead-lock, let's fail | |
2032 | * immediately. */ | |
2033 | ||
2034 | sd_bus_message_unref(incoming); | |
2035 | return -ELOOP; | |
de1c301e LP |
2036 | } |
2037 | ||
de1c301e | 2038 | /* Try to read more, right-away */ |
7d22c717 | 2039 | i++; |
de1c301e | 2040 | } |
7d22c717 | 2041 | |
766c5809 | 2042 | r = bus_read_message(bus, false, 0); |
32f46480 | 2043 | if (r < 0) { |
441d56a1 | 2044 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2045 | bus_enter_closing(bus); |
441d56a1 LP |
2046 | return -ECONNRESET; |
2047 | } | |
32f46480 | 2048 | |
a43b9ca3 | 2049 | return r; |
32f46480 | 2050 | } |
7d22c717 | 2051 | if (r > 0) |
e3017af9 | 2052 | continue; |
de1c301e LP |
2053 | |
2054 | if (timeout > 0) { | |
2055 | usec_t n; | |
2056 | ||
2057 | n = now(CLOCK_MONOTONIC); | |
2058 | if (n >= timeout) | |
2059 | return -ETIMEDOUT; | |
2060 | ||
2061 | left = timeout - n; | |
2062 | } else | |
2063 | left = (uint64_t) -1; | |
2064 | ||
e3017af9 | 2065 | r = bus_poll(bus, true, left); |
de1c301e LP |
2066 | if (r < 0) |
2067 | return r; | |
f8e11cda LP |
2068 | if (r == 0) |
2069 | return -ETIMEDOUT; | |
de1c301e LP |
2070 | |
2071 | r = dispatch_wqueue(bus); | |
32f46480 | 2072 | if (r < 0) { |
441d56a1 | 2073 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2074 | bus_enter_closing(bus); |
441d56a1 LP |
2075 | return -ECONNRESET; |
2076 | } | |
32f46480 | 2077 | |
de1c301e | 2078 | return r; |
32f46480 | 2079 | } |
de1c301e LP |
2080 | } |
2081 | } | |
2082 | ||
d9f644e2 | 2083 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
2084 | |
2085 | assert_return(bus, -EINVAL); | |
d6888822 LP |
2086 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
2087 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2088 | |
e82c9509 | 2089 | return bus->input_fd; |
de1c301e LP |
2090 | } |
2091 | ||
d9f644e2 | 2092 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
2093 | int flags = 0; |
2094 | ||
d6888822 | 2095 | assert_return(bus, -EINVAL); |
d6888822 | 2096 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 2097 | |
a3d59cd1 LP |
2098 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2099 | return -ENOTCONN; | |
2100 | ||
de1c301e LP |
2101 | if (bus->state == BUS_OPENING) |
2102 | flags |= POLLOUT; | |
89ffcd2a LP |
2103 | else if (bus->state == BUS_AUTHENTICATING) { |
2104 | ||
2181a7f5 | 2105 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
2106 | flags |= POLLOUT; |
2107 | ||
2108 | flags |= POLLIN; | |
2109 | ||
2110 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
2111 | if (bus->rqueue_size <= 0) |
2112 | flags |= POLLIN; | |
2113 | if (bus->wqueue_size > 0) | |
2114 | flags |= POLLOUT; | |
2115 | } | |
2116 | ||
2117 | return flags; | |
2118 | } | |
2119 | ||
d9f644e2 | 2120 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
2121 | struct reply_callback *c; |
2122 | ||
d6888822 LP |
2123 | assert_return(bus, -EINVAL); |
2124 | assert_return(timeout_usec, -EINVAL); | |
d6888822 | 2125 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 2126 | |
a3d59cd1 LP |
2127 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2128 | return -ENOTCONN; | |
2129 | ||
8f8f05a9 LP |
2130 | if (bus->track_queue) { |
2131 | *timeout_usec = 0; | |
2132 | return 1; | |
2133 | } | |
2134 | ||
718db961 LP |
2135 | if (bus->state == BUS_CLOSING) { |
2136 | *timeout_usec = 0; | |
2137 | return 1; | |
2138 | } | |
2139 | ||
e3017af9 LP |
2140 | if (bus->state == BUS_AUTHENTICATING) { |
2141 | *timeout_usec = bus->auth_timeout; | |
2142 | return 1; | |
2143 | } | |
2144 | ||
adee69fa LP |
2145 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
2146 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2147 | return 0; |
adee69fa | 2148 | } |
e3017af9 | 2149 | |
8efd6381 LP |
2150 | if (bus->rqueue_size > 0) { |
2151 | *timeout_usec = 0; | |
2152 | return 1; | |
2153 | } | |
2154 | ||
e3017af9 | 2155 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
2156 | if (!c) { |
2157 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2158 | return 0; |
adee69fa | 2159 | } |
e3017af9 | 2160 | |
19befb2d LP |
2161 | if (c->timeout == 0) { |
2162 | *timeout_usec = (uint64_t) -1; | |
2163 | return 0; | |
2164 | } | |
2165 | ||
e3017af9 LP |
2166 | *timeout_usec = c->timeout; |
2167 | return 1; | |
2168 | } | |
2169 | ||
2170 | static int process_timeout(sd_bus *bus) { | |
ebcf1f97 | 2171 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
eb01ba5d | 2172 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 | 2173 | struct reply_callback *c; |
1b64f838 | 2174 | sd_bus_slot *slot; |
e3017af9 LP |
2175 | usec_t n; |
2176 | int r; | |
2177 | ||
2178 | assert(bus); | |
2179 | ||
2180 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2181 | if (!c) | |
2182 | return 0; | |
2183 | ||
2184 | n = now(CLOCK_MONOTONIC); | |
2185 | if (c->timeout > n) | |
2186 | return 0; | |
2187 | ||
eb01ba5d LP |
2188 | r = bus_message_new_synthetic_error( |
2189 | bus, | |
693eb9a2 | 2190 | c->cookie, |
14c24659 | 2191 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2192 | &m); |
2193 | if (r < 0) | |
2194 | return r; | |
2195 | ||
7adc46fc | 2196 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2197 | if (r < 0) |
2198 | return r; | |
2199 | ||
e3017af9 | 2200 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
19befb2d LP |
2201 | c->timeout = 0; |
2202 | ||
c9fe4af7 | 2203 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2204 | c->cookie = 0; |
2205 | ||
1b64f838 | 2206 | slot = container_of(c, sd_bus_slot, reply_callback); |
e3017af9 | 2207 | |
718db961 LP |
2208 | bus->iteration_counter ++; |
2209 | ||
1b64f838 LP |
2210 | bus->current_message = m; |
2211 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2212 | bus->current_handler = c->callback; |
2213 | bus->current_userdata = slot->userdata; | |
19070062 | 2214 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2215 | bus->current_userdata = NULL; |
2216 | bus->current_handler = NULL; | |
d974ad05 | 2217 | bus->current_slot = NULL; |
19befb2d | 2218 | bus->current_message = NULL; |
718db961 | 2219 | |
1b64f838 LP |
2220 | if (slot->floating) { |
2221 | bus_slot_disconnect(slot); | |
2222 | sd_bus_slot_unref(slot); | |
2223 | } | |
2224 | ||
d974ad05 DH |
2225 | sd_bus_slot_unref(slot); |
2226 | ||
1b64f838 | 2227 | return bus_maybe_reply_error(m, r, &error_buffer); |
e3017af9 LP |
2228 | } |
2229 | ||
9d373862 LP |
2230 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2231 | assert(bus); | |
2232 | assert(m); | |
2233 | ||
2234 | if (bus->state != BUS_HELLO) | |
2235 | return 0; | |
2236 | ||
2237 | /* Let's make sure the first message on the bus is the HELLO | |
2238 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2239 | * here (we leave that to the usual handling), we just verify |
2240 | * we don't let any earlier msg through. */ | |
9d373862 | 2241 | |
40ca29a1 LP |
2242 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2243 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
2244 | return -EIO; |
2245 | ||
19befb2d | 2246 | if (m->reply_cookie != 1) |
9d373862 LP |
2247 | return -EIO; |
2248 | ||
2249 | return 0; | |
2250 | } | |
2251 | ||
a652755d | 2252 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
2ce97e2b | 2253 | _cleanup_bus_message_unref_ sd_bus_message *synthetic_reply = NULL; |
ebcf1f97 | 2254 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
19befb2d | 2255 | struct reply_callback *c; |
1b64f838 | 2256 | sd_bus_slot *slot; |
a652755d LP |
2257 | int r; |
2258 | ||
2259 | assert(bus); | |
2260 | assert(m); | |
2261 | ||
40ca29a1 LP |
2262 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2263 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
2264 | return 0; |
2265 | ||
09365592 LP |
2266 | if (bus->is_kernel && (bus->hello_flags & KDBUS_HELLO_MONITOR)) |
2267 | return 0; | |
2268 | ||
2269 | if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name)) | |
2270 | return 0; | |
2271 | ||
c9fe4af7 | 2272 | c = ordered_hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2273 | if (!c) |
2274 | return 0; | |
2275 | ||
19befb2d | 2276 | c->cookie = 0; |
19befb2d | 2277 | |
1b64f838 | 2278 | slot = container_of(c, sd_bus_slot, reply_callback); |
a652755d | 2279 | |
2ce97e2b LP |
2280 | if (m->n_fds > 0 && !(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2281 | ||
2282 | /* If the reply contained a file descriptor which we | |
2283 | * didn't want we pass an error instead. */ | |
2284 | ||
2285 | r = bus_message_new_synthetic_error( | |
2286 | bus, | |
2287 | m->reply_cookie, | |
2288 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"), | |
2289 | &synthetic_reply); | |
2290 | if (r < 0) | |
1b64f838 | 2291 | return r; |
2ce97e2b | 2292 | |
52cd5877 LP |
2293 | /* Copy over original timestamp */ |
2294 | synthetic_reply->realtime = m->realtime; | |
2295 | synthetic_reply->monotonic = m->monotonic; | |
2296 | synthetic_reply->seqnum = m->seqnum; | |
2297 | ||
2ce97e2b LP |
2298 | r = bus_seal_synthetic_message(bus, synthetic_reply); |
2299 | if (r < 0) | |
1b64f838 | 2300 | return r; |
2ce97e2b LP |
2301 | |
2302 | m = synthetic_reply; | |
2303 | } else { | |
2304 | r = sd_bus_message_rewind(m, true); | |
2305 | if (r < 0) | |
1b64f838 | 2306 | return r; |
2ce97e2b | 2307 | } |
88fe224c | 2308 | |
1b64f838 LP |
2309 | if (c->timeout != 0) { |
2310 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2311 | c->timeout = 0; | |
2312 | } | |
19befb2d | 2313 | |
1b64f838 | 2314 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
2315 | bus->current_handler = c->callback; |
2316 | bus->current_userdata = slot->userdata; | |
19070062 | 2317 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2318 | bus->current_userdata = NULL; |
2319 | bus->current_handler = NULL; | |
d974ad05 | 2320 | bus->current_slot = NULL; |
a652755d | 2321 | |
19befb2d LP |
2322 | if (slot->floating) { |
2323 | bus_slot_disconnect(slot); | |
2324 | sd_bus_slot_unref(slot); | |
2325 | } | |
2326 | ||
d974ad05 DH |
2327 | sd_bus_slot_unref(slot); |
2328 | ||
1b64f838 | 2329 | return bus_maybe_reply_error(m, r, &error_buffer); |
a652755d LP |
2330 | } |
2331 | ||
2332 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
ebcf1f97 | 2333 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2334 | struct filter_callback *l; |
2335 | int r; | |
2336 | ||
392d5b37 LP |
2337 | assert(bus); |
2338 | assert(m); | |
2339 | ||
7286037f LP |
2340 | do { |
2341 | bus->filter_callbacks_modified = false; | |
2342 | ||
2343 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1b64f838 | 2344 | sd_bus_slot *slot; |
7286037f LP |
2345 | |
2346 | if (bus->filter_callbacks_modified) | |
2347 | break; | |
2348 | ||
2349 | /* Don't run this more than once per iteration */ | |
2350 | if (l->last_iteration == bus->iteration_counter) | |
2351 | continue; | |
2352 | ||
2353 | l->last_iteration = bus->iteration_counter; | |
2354 | ||
88fe224c LP |
2355 | r = sd_bus_message_rewind(m, true); |
2356 | if (r < 0) | |
2357 | return r; | |
2358 | ||
1b64f838 LP |
2359 | slot = container_of(l, sd_bus_slot, filter_callback); |
2360 | ||
2361 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2362 | bus->current_handler = l->callback; |
2363 | bus->current_userdata = slot->userdata; | |
19070062 | 2364 | r = l->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2365 | bus->current_userdata = NULL; |
2366 | bus->current_handler = NULL; | |
1b64f838 | 2367 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 2368 | |
ebcf1f97 | 2369 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2370 | if (r != 0) |
2371 | return r; | |
2372 | ||
2373 | } | |
2374 | ||
2375 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2376 | |
2377 | return 0; | |
2378 | } | |
2379 | ||
392d5b37 | 2380 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2381 | int r; |
2382 | ||
392d5b37 LP |
2383 | assert(bus); |
2384 | assert(m); | |
2385 | ||
7286037f LP |
2386 | do { |
2387 | bus->match_callbacks_modified = false; | |
2388 | ||
eb01ba5d | 2389 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2390 | if (r != 0) |
2391 | return r; | |
2392 | ||
2393 | } while (bus->match_callbacks_modified); | |
2394 | ||
2395 | return 0; | |
392d5b37 LP |
2396 | } |
2397 | ||
b9bf7e2b LP |
2398 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
2399 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
2400 | int r; | |
2401 | ||
2402 | assert(bus); | |
2403 | assert(m); | |
2404 | ||
09365592 LP |
2405 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2406 | return 0; | |
2407 | ||
758bf0c7 LP |
2408 | if (bus->manual_peer_interface) |
2409 | return 0; | |
2410 | ||
40ca29a1 | 2411 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2412 | return 0; |
2413 | ||
2414 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2415 | return 0; | |
2416 | ||
0461f8cd | 2417 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2418 | return 1; |
2419 | ||
2420 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2421 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2422 | else if (streq_ptr(m->member, "GetMachineId")) { |
2423 | sd_id128_t id; | |
2424 | char sid[33]; | |
2425 | ||
2426 | r = sd_id128_get_machine(&id); | |
2427 | if (r < 0) | |
2428 | return r; | |
2429 | ||
df2d202e | 2430 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2431 | if (r < 0) |
2432 | return r; | |
2433 | ||
2434 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2435 | } else { | |
29ddb38f | 2436 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2437 | m, &reply, |
40ca29a1 | 2438 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2439 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2440 | } |
2441 | ||
2442 | if (r < 0) | |
2443 | return r; | |
2444 | ||
2445 | r = sd_bus_send(bus, reply, NULL); | |
2446 | if (r < 0) | |
2447 | return r; | |
2448 | ||
2449 | return 1; | |
2450 | } | |
2451 | ||
2ce97e2b LP |
2452 | static int process_fd_check(sd_bus *bus, sd_bus_message *m) { |
2453 | assert(bus); | |
2454 | assert(m); | |
2455 | ||
2456 | /* If we got a message with a file descriptor which we didn't | |
2457 | * want to accept, then let's drop it. How can this even | |
2458 | * happen? For example, when the kernel queues a message into | |
2459 | * an activatable names's queue which allows fds, and then is | |
2460 | * delivered to us later even though we ourselves did not | |
2461 | * negotiate it. */ | |
2462 | ||
09365592 LP |
2463 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2464 | return 0; | |
2465 | ||
2ce97e2b LP |
2466 | if (m->n_fds <= 0) |
2467 | return 0; | |
2468 | ||
2469 | if (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD) | |
2470 | return 0; | |
2471 | ||
2472 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
2473 | return 1; /* just eat it up */ | |
2474 | ||
2475 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry."); | |
2476 | } | |
2477 | ||
992c052c | 2478 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2479 | int r; |
2480 | ||
2481 | assert(bus); | |
992c052c | 2482 | assert(m); |
e3017af9 | 2483 | |
19befb2d | 2484 | bus->current_message = m; |
992c052c | 2485 | bus->iteration_counter++; |
e3017af9 | 2486 | |
f9f97ca6 | 2487 | log_debug_bus_message(m); |
40ca29a1 | 2488 | |
992c052c LP |
2489 | r = process_hello(bus, m); |
2490 | if (r != 0) | |
affff0b6 | 2491 | goto finish; |
a652755d | 2492 | |
992c052c LP |
2493 | r = process_reply(bus, m); |
2494 | if (r != 0) | |
affff0b6 | 2495 | goto finish; |
e3017af9 | 2496 | |
2ce97e2b LP |
2497 | r = process_fd_check(bus, m); |
2498 | if (r != 0) | |
2499 | goto finish; | |
2500 | ||
992c052c LP |
2501 | r = process_filter(bus, m); |
2502 | if (r != 0) | |
affff0b6 | 2503 | goto finish; |
a652755d | 2504 | |
992c052c LP |
2505 | r = process_match(bus, m); |
2506 | if (r != 0) | |
affff0b6 | 2507 | goto finish; |
a652755d | 2508 | |
992c052c LP |
2509 | r = process_builtin(bus, m); |
2510 | if (r != 0) | |
affff0b6 LP |
2511 | goto finish; |
2512 | ||
2513 | r = bus_process_object(bus, m); | |
a652755d | 2514 | |
affff0b6 | 2515 | finish: |
19befb2d | 2516 | bus->current_message = NULL; |
affff0b6 | 2517 | return r; |
29ddb38f | 2518 | } |
88fe224c | 2519 | |
8f8f05a9 LP |
2520 | static int dispatch_track(sd_bus *bus) { |
2521 | assert(bus); | |
2522 | ||
2523 | if (!bus->track_queue) | |
2524 | return 0; | |
2525 | ||
2526 | bus_track_dispatch(bus->track_queue); | |
2527 | return 1; | |
2528 | } | |
2529 | ||
766c5809 | 2530 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
992c052c | 2531 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
29ddb38f | 2532 | int r; |
a652755d | 2533 | |
29ddb38f | 2534 | assert(bus); |
992c052c | 2535 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2536 | |
992c052c LP |
2537 | r = process_timeout(bus); |
2538 | if (r != 0) | |
2539 | goto null_message; | |
7286037f | 2540 | |
992c052c LP |
2541 | r = dispatch_wqueue(bus); |
2542 | if (r != 0) | |
2543 | goto null_message; | |
7286037f | 2544 | |
8f8f05a9 LP |
2545 | r = dispatch_track(bus); |
2546 | if (r != 0) | |
2547 | goto null_message; | |
2548 | ||
766c5809 | 2549 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2550 | if (r < 0) |
2551 | return r; | |
2552 | if (!m) | |
2553 | goto null_message; | |
7286037f | 2554 | |
992c052c LP |
2555 | r = process_message(bus, m); |
2556 | if (r != 0) | |
2557 | goto null_message; | |
7286037f | 2558 | |
992c052c LP |
2559 | if (ret) { |
2560 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2561 | if (r < 0) |
2562 | return r; | |
e3017af9 | 2563 | |
992c052c LP |
2564 | *ret = m; |
2565 | m = NULL; | |
2566 | return 1; | |
2567 | } | |
a652755d | 2568 | |
40ca29a1 | 2569 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2570 | |
dc74ce9b LP |
2571 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2572 | strna(sd_bus_message_get_sender(m)), | |
2573 | strna(sd_bus_message_get_path(m)), | |
2574 | strna(sd_bus_message_get_interface(m)), | |
2575 | strna(sd_bus_message_get_member(m))); | |
2576 | ||
992c052c | 2577 | r = sd_bus_reply_method_errorf( |
df2d202e | 2578 | m, |
40ca29a1 | 2579 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2580 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2581 | if (r < 0) |
2582 | return r; | |
2583 | } | |
e3017af9 | 2584 | |
992c052c | 2585 | return 1; |
0a72c2bd | 2586 | |
992c052c LP |
2587 | null_message: |
2588 | if (r >= 0 && ret) | |
2589 | *ret = NULL; | |
0a72c2bd | 2590 | |
992c052c | 2591 | return r; |
29ddb38f | 2592 | } |
0a72c2bd | 2593 | |
718db961 LP |
2594 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2595 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2596 | struct reply_callback *c; | |
2597 | int r; | |
2598 | ||
2599 | assert(bus); | |
2600 | assert(bus->state == BUS_CLOSING); | |
2601 | ||
c9fe4af7 | 2602 | c = ordered_hashmap_first(bus->reply_callbacks); |
718db961 | 2603 | if (c) { |
ebcf1f97 | 2604 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
1b64f838 | 2605 | sd_bus_slot *slot; |
ebcf1f97 | 2606 | |
718db961 LP |
2607 | /* First, fail all outstanding method calls */ |
2608 | r = bus_message_new_synthetic_error( | |
2609 | bus, | |
693eb9a2 | 2610 | c->cookie, |
14c24659 | 2611 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), |
718db961 LP |
2612 | &m); |
2613 | if (r < 0) | |
2614 | return r; | |
2615 | ||
7adc46fc | 2616 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2617 | if (r < 0) |
2618 | return r; | |
2619 | ||
19befb2d | 2620 | if (c->timeout != 0) { |
718db961 | 2621 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
19befb2d LP |
2622 | c->timeout = 0; |
2623 | } | |
718db961 | 2624 | |
c9fe4af7 | 2625 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2626 | c->cookie = 0; |
2627 | ||
1b64f838 | 2628 | slot = container_of(c, sd_bus_slot, reply_callback); |
718db961 | 2629 | |
718db961 LP |
2630 | bus->iteration_counter++; |
2631 | ||
1b64f838 LP |
2632 | bus->current_message = m; |
2633 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2634 | bus->current_handler = c->callback; |
2635 | bus->current_userdata = slot->userdata; | |
19070062 | 2636 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2637 | bus->current_userdata = NULL; |
2638 | bus->current_handler = NULL; | |
d974ad05 | 2639 | bus->current_slot = NULL; |
1b64f838 LP |
2640 | bus->current_message = NULL; |
2641 | ||
2642 | if (slot->floating) { | |
2643 | bus_slot_disconnect(slot); | |
2644 | sd_bus_slot_unref(slot); | |
2645 | } | |
718db961 | 2646 | |
d974ad05 DH |
2647 | sd_bus_slot_unref(slot); |
2648 | ||
1b64f838 | 2649 | return bus_maybe_reply_error(m, r, &error_buffer); |
718db961 LP |
2650 | } |
2651 | ||
2652 | /* Then, synthesize a Disconnected message */ | |
2653 | r = sd_bus_message_new_signal( | |
2654 | bus, | |
151b9b96 | 2655 | &m, |
718db961 LP |
2656 | "/org/freedesktop/DBus/Local", |
2657 | "org.freedesktop.DBus.Local", | |
151b9b96 | 2658 | "Disconnected"); |
718db961 LP |
2659 | if (r < 0) |
2660 | return r; | |
2661 | ||
fb6d9b77 | 2662 | bus_message_set_sender_local(bus, m); |
34a2c9e8 | 2663 | |
7adc46fc | 2664 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2665 | if (r < 0) |
2666 | return r; | |
2667 | ||
2668 | sd_bus_close(bus); | |
2669 | ||
19befb2d | 2670 | bus->current_message = m; |
718db961 LP |
2671 | bus->iteration_counter++; |
2672 | ||
2673 | r = process_filter(bus, m); | |
2674 | if (r != 0) | |
2675 | goto finish; | |
2676 | ||
2677 | r = process_match(bus, m); | |
2678 | if (r != 0) | |
2679 | goto finish; | |
2680 | ||
2681 | if (ret) { | |
2682 | *ret = m; | |
2683 | m = NULL; | |
2684 | } | |
2685 | ||
2686 | r = 1; | |
2687 | ||
2688 | finish: | |
19befb2d LP |
2689 | bus->current_message = NULL; |
2690 | ||
718db961 LP |
2691 | return r; |
2692 | } | |
2693 | ||
766c5809 | 2694 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2695 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2696 | int r; |
0a72c2bd | 2697 | |
992c052c LP |
2698 | /* Returns 0 when we didn't do anything. This should cause the |
2699 | * caller to invoke sd_bus_wait() before returning the next | |
2700 | * time. Returns > 0 when we did something, which possibly | |
2701 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2702 | |
d6888822 LP |
2703 | assert_return(bus, -EINVAL); |
2704 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2705 | |
992c052c | 2706 | /* We don't allow recursively invoking sd_bus_process(). */ |
19befb2d LP |
2707 | assert_return(!bus->current_message, -EBUSY); |
2708 | assert(!bus->current_slot); | |
0a72c2bd | 2709 | |
992c052c | 2710 | switch (bus->state) { |
0a72c2bd | 2711 | |
992c052c | 2712 | case BUS_UNSET: |
992c052c | 2713 | return -ENOTCONN; |
0a72c2bd | 2714 | |
6d6f4904 LP |
2715 | case BUS_CLOSED: |
2716 | return -ECONNRESET; | |
2717 | ||
992c052c LP |
2718 | case BUS_OPENING: |
2719 | r = bus_socket_process_opening(bus); | |
441d56a1 | 2720 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2721 | bus_enter_closing(bus); |
2722 | r = 1; | |
2723 | } else if (r < 0) | |
29ddb38f | 2724 | return r; |
992c052c LP |
2725 | if (ret) |
2726 | *ret = NULL; | |
a652755d LP |
2727 | return r; |
2728 | ||
992c052c | 2729 | case BUS_AUTHENTICATING: |
992c052c | 2730 | r = bus_socket_process_authenticating(bus); |
441d56a1 | 2731 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2732 | bus_enter_closing(bus); |
2733 | r = 1; | |
2734 | } else if (r < 0) | |
29ddb38f | 2735 | return r; |
718db961 | 2736 | |
992c052c LP |
2737 | if (ret) |
2738 | *ret = NULL; | |
718db961 | 2739 | |
992c052c | 2740 | return r; |
a652755d | 2741 | |
992c052c LP |
2742 | case BUS_RUNNING: |
2743 | case BUS_HELLO: | |
766c5809 | 2744 | r = process_running(bus, hint_priority, priority, ret); |
441d56a1 | 2745 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2746 | bus_enter_closing(bus); |
2747 | r = 1; | |
2748 | ||
2749 | if (ret) | |
2750 | *ret = NULL; | |
2751 | } | |
43a43f50 | 2752 | |
43a43f50 | 2753 | return r; |
718db961 LP |
2754 | |
2755 | case BUS_CLOSING: | |
2756 | return process_closing(bus, ret); | |
992c052c | 2757 | } |
43a43f50 | 2758 | |
992c052c | 2759 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2760 | } |
2761 | ||
766c5809 LP |
2762 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2763 | return bus_process_internal(bus, false, 0, ret); | |
2764 | } | |
2765 | ||
2766 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2767 | return bus_process_internal(bus, true, priority, ret); | |
2768 | } | |
2769 | ||
992c052c LP |
2770 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2771 | struct pollfd p[2] = {}; | |
2772 | int r, e, n; | |
2773 | struct timespec ts; | |
3a43da28 | 2774 | usec_t m = USEC_INFINITY; |
adcdb374 LP |
2775 | |
2776 | assert(bus); | |
718db961 LP |
2777 | |
2778 | if (bus->state == BUS_CLOSING) | |
2779 | return 1; | |
2780 | ||
a3d59cd1 LP |
2781 | if (!BUS_IS_OPEN(bus->state)) |
2782 | return -ENOTCONN; | |
adcdb374 | 2783 | |
992c052c LP |
2784 | e = sd_bus_get_events(bus); |
2785 | if (e < 0) | |
2786 | return e; | |
adcdb374 | 2787 | |
992c052c | 2788 | if (need_more) |
8efd6381 LP |
2789 | /* The caller really needs some more data, he doesn't |
2790 | * care about what's already read, or any timeouts | |
ad67ef27 | 2791 | * except its own. */ |
992c052c | 2792 | e |= POLLIN; |
992c052c | 2793 | else { |
8efd6381 LP |
2794 | usec_t until; |
2795 | /* The caller wants to process if there's something to | |
2796 | * process, but doesn't care otherwise */ | |
2797 | ||
2798 | r = sd_bus_get_timeout(bus, &until); | |
2799 | if (r < 0) | |
2800 | return r; | |
2801 | if (r > 0) { | |
2802 | usec_t nw; | |
2803 | nw = now(CLOCK_MONOTONIC); | |
2804 | m = until > nw ? until - nw : 0; | |
2805 | } | |
992c052c | 2806 | } |
adcdb374 | 2807 | |
992c052c LP |
2808 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2809 | m = timeout_usec; | |
adcdb374 | 2810 | |
992c052c LP |
2811 | p[0].fd = bus->input_fd; |
2812 | if (bus->output_fd == bus->input_fd) { | |
2813 | p[0].events = e; | |
2814 | n = 1; | |
2815 | } else { | |
2816 | p[0].events = e & POLLIN; | |
2817 | p[1].fd = bus->output_fd; | |
2818 | p[1].events = e & POLLOUT; | |
2819 | n = 2; | |
adcdb374 LP |
2820 | } |
2821 | ||
992c052c | 2822 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2823 | if (r < 0) |
992c052c | 2824 | return -errno; |
adcdb374 | 2825 | |
992c052c | 2826 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2827 | } |
2828 | ||
d9f644e2 | 2829 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2830 | |
d6888822 | 2831 | assert_return(bus, -EINVAL); |
d6888822 | 2832 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2833 | |
718db961 LP |
2834 | if (bus->state == BUS_CLOSING) |
2835 | return 0; | |
2836 | ||
a3d59cd1 LP |
2837 | if (!BUS_IS_OPEN(bus->state)) |
2838 | return -ENOTCONN; | |
718db961 | 2839 | |
992c052c LP |
2840 | if (bus->rqueue_size > 0) |
2841 | return 0; | |
9db76355 | 2842 | |
992c052c LP |
2843 | return bus_poll(bus, false, timeout_usec); |
2844 | } | |
9db76355 | 2845 | |
d9f644e2 | 2846 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2847 | int r; |
9db76355 | 2848 | |
d6888822 | 2849 | assert_return(bus, -EINVAL); |
d6888822 | 2850 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2851 | |
718db961 LP |
2852 | if (bus->state == BUS_CLOSING) |
2853 | return 0; | |
2854 | ||
a3d59cd1 LP |
2855 | if (!BUS_IS_OPEN(bus->state)) |
2856 | return -ENOTCONN; | |
718db961 | 2857 | |
992c052c LP |
2858 | r = bus_ensure_running(bus); |
2859 | if (r < 0) | |
2860 | return r; | |
9db76355 | 2861 | |
992c052c LP |
2862 | if (bus->wqueue_size <= 0) |
2863 | return 0; | |
9db76355 | 2864 | |
992c052c LP |
2865 | for (;;) { |
2866 | r = dispatch_wqueue(bus); | |
32f46480 | 2867 | if (r < 0) { |
441d56a1 | 2868 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2869 | bus_enter_closing(bus); |
441d56a1 LP |
2870 | return -ECONNRESET; |
2871 | } | |
32f46480 | 2872 | |
9db76355 | 2873 | return r; |
32f46480 | 2874 | } |
9db76355 | 2875 | |
992c052c LP |
2876 | if (bus->wqueue_size <= 0) |
2877 | return 0; | |
9db76355 | 2878 | |
992c052c | 2879 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2880 | if (r < 0) |
2881 | return r; | |
9db76355 | 2882 | } |
9db76355 LP |
2883 | } |
2884 | ||
19befb2d LP |
2885 | _public_ int sd_bus_add_filter( |
2886 | sd_bus *bus, | |
2887 | sd_bus_slot **slot, | |
2888 | sd_bus_message_handler_t callback, | |
2889 | void *userdata) { | |
d9f644e2 | 2890 | |
19befb2d | 2891 | sd_bus_slot *s; |
de1c301e | 2892 | |
d6888822 LP |
2893 | assert_return(bus, -EINVAL); |
2894 | assert_return(callback, -EINVAL); | |
2895 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2896 | |
19befb2d LP |
2897 | s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata); |
2898 | if (!s) | |
29ddb38f LP |
2899 | return -ENOMEM; |
2900 | ||
19befb2d | 2901 | s->filter_callback.callback = callback; |
a652755d | 2902 | |
19befb2d LP |
2903 | bus->filter_callbacks_modified = true; |
2904 | LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback); | |
a652755d | 2905 | |
19befb2d LP |
2906 | if (slot) |
2907 | *slot = s; | |
29ddb38f | 2908 | |
992c052c | 2909 | return 0; |
a652755d | 2910 | } |
392d5b37 | 2911 | |
19befb2d LP |
2912 | _public_ int sd_bus_add_match( |
2913 | sd_bus *bus, | |
2914 | sd_bus_slot **slot, | |
2915 | const char *match, | |
2916 | sd_bus_message_handler_t callback, | |
2917 | void *userdata) { | |
d9f644e2 | 2918 | |
992c052c LP |
2919 | struct bus_match_component *components = NULL; |
2920 | unsigned n_components = 0; | |
2915234d | 2921 | sd_bus_slot *s = NULL; |
992c052c | 2922 | int r = 0; |
392d5b37 | 2923 | |
d6888822 LP |
2924 | assert_return(bus, -EINVAL); |
2925 | assert_return(match, -EINVAL); | |
2926 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2927 | |
992c052c LP |
2928 | r = bus_match_parse(match, &components, &n_components); |
2929 | if (r < 0) | |
2930 | goto finish; | |
29ddb38f | 2931 | |
19befb2d LP |
2932 | s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata); |
2933 | if (!s) { | |
2934 | r = -ENOMEM; | |
2935 | goto finish; | |
2936 | } | |
2937 | ||
2938 | s->match_callback.callback = callback; | |
2939 | s->match_callback.cookie = ++bus->match_cookie; | |
2940 | ||
992c052c | 2941 | if (bus->bus_client) { |
cc65fe5e | 2942 | enum bus_match_scope scope; |
29ddb38f | 2943 | |
cc65fe5e | 2944 | scope = bus_match_get_scope(components, n_components); |
19befb2d | 2945 | |
cc65fe5e LP |
2946 | /* Do not install server-side matches for matches |
2947 | * against the local service, interface or bus | |
9ee7a50c DH |
2948 | * path. */ |
2949 | if (scope != BUS_MATCH_LOCAL) { | |
cc65fe5e LP |
2950 | |
2951 | if (!bus->is_kernel) { | |
2952 | /* When this is not a kernel transport, we | |
2953 | * store the original match string, so that we | |
2954 | * can use it to remove the match again */ | |
2955 | ||
2956 | s->match_callback.match_string = strdup(match); | |
2957 | if (!s->match_callback.match_string) { | |
2958 | r = -ENOMEM; | |
2959 | goto finish; | |
2960 | } | |
19befb2d | 2961 | } |
19befb2d | 2962 | |
cc65fe5e LP |
2963 | r = bus_add_match_internal(bus, s->match_callback.match_string, components, n_components, s->match_callback.cookie); |
2964 | if (r < 0) | |
2965 | goto finish; | |
2966 | ||
2967 | s->match_added = true; | |
2968 | } | |
392d5b37 LP |
2969 | } |
2970 | ||
992c052c | 2971 | bus->match_callbacks_modified = true; |
19befb2d LP |
2972 | r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback); |
2973 | if (r < 0) | |
2974 | goto finish; | |
2975 | ||
2976 | if (slot) | |
2977 | *slot = s; | |
2978 | s = NULL; | |
917b5dc7 | 2979 | |
992c052c LP |
2980 | finish: |
2981 | bus_match_parse_free(components, n_components); | |
19befb2d LP |
2982 | sd_bus_slot_unref(s); |
2983 | ||
992c052c | 2984 | return r; |
917b5dc7 LP |
2985 | } |
2986 | ||
19befb2d LP |
2987 | int bus_remove_match_by_string( |
2988 | sd_bus *bus, | |
2989 | const char *match, | |
2990 | sd_bus_message_handler_t callback, | |
2991 | void *userdata) { | |
d9f644e2 | 2992 | |
992c052c LP |
2993 | struct bus_match_component *components = NULL; |
2994 | unsigned n_components = 0; | |
19befb2d LP |
2995 | struct match_callback *c; |
2996 | int r = 0; | |
917b5dc7 | 2997 | |
d6888822 LP |
2998 | assert_return(bus, -EINVAL); |
2999 | assert_return(match, -EINVAL); | |
3000 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 3001 | |
992c052c | 3002 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f | 3003 | if (r < 0) |
19befb2d | 3004 | goto finish; |
f10dda3b | 3005 | |
19befb2d LP |
3006 | r = bus_match_find(&bus->match_callbacks, components, n_components, NULL, NULL, &c); |
3007 | if (r <= 0) | |
3008 | goto finish; | |
f10dda3b | 3009 | |
19befb2d | 3010 | sd_bus_slot_unref(container_of(c, sd_bus_slot, match_callback)); |
f10dda3b | 3011 | |
19befb2d | 3012 | finish: |
992c052c | 3013 | bus_match_parse_free(components, n_components); |
f10dda3b | 3014 | |
19befb2d | 3015 | return r; |
f10dda3b LP |
3016 | } |
3017 | ||
992c052c LP |
3018 | bool bus_pid_changed(sd_bus *bus) { |
3019 | assert(bus); | |
f10dda3b | 3020 | |
992c052c LP |
3021 | /* We don't support people creating a bus connection and |
3022 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 3023 | |
992c052c | 3024 | return bus->original_pid != getpid(); |
d5a2b9a6 | 3025 | } |
40ca29a1 LP |
3026 | |
3027 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 3028 | sd_bus *bus = userdata; |
40ca29a1 LP |
3029 | int r; |
3030 | ||
3031 | assert(bus); | |
3032 | ||
3033 | r = sd_bus_process(bus, NULL); | |
3034 | if (r < 0) | |
3035 | return r; | |
3036 | ||
3037 | return 1; | |
3038 | } | |
3039 | ||
3040 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 3041 | sd_bus *bus = userdata; |
40ca29a1 LP |
3042 | int r; |
3043 | ||
3044 | assert(bus); | |
3045 | ||
3046 | r = sd_bus_process(bus, NULL); | |
3047 | if (r < 0) | |
3048 | return r; | |
3049 | ||
3050 | return 1; | |
3051 | } | |
3052 | ||
3053 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
3054 | sd_bus *bus = userdata; | |
3055 | int r, e; | |
3056 | usec_t until; | |
3057 | ||
3058 | assert(s); | |
3059 | assert(bus); | |
3060 | ||
3061 | e = sd_bus_get_events(bus); | |
3062 | if (e < 0) | |
3063 | return e; | |
3064 | ||
3065 | if (bus->output_fd != bus->input_fd) { | |
3066 | ||
3067 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
3068 | if (r < 0) | |
3069 | return r; | |
3070 | ||
3071 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
3072 | if (r < 0) | |
3073 | return r; | |
3074 | } else { | |
3075 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
3076 | if (r < 0) | |
3077 | return r; | |
3078 | } | |
3079 | ||
3080 | r = sd_bus_get_timeout(bus, &until); | |
3081 | if (r < 0) | |
3082 | return r; | |
3083 | if (r > 0) { | |
3084 | int j; | |
3085 | ||
3086 | j = sd_event_source_set_time(bus->time_event_source, until); | |
3087 | if (j < 0) | |
3088 | return j; | |
3089 | } | |
3090 | ||
3091 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
3092 | if (r < 0) | |
3093 | return r; | |
3094 | ||
3095 | return 1; | |
3096 | } | |
3097 | ||
abc5fe72 LP |
3098 | static int quit_callback(sd_event_source *event, void *userdata) { |
3099 | sd_bus *bus = userdata; | |
3100 | ||
3101 | assert(event); | |
3102 | ||
3103 | sd_bus_flush(bus); | |
7bb4d371 | 3104 | sd_bus_close(bus); |
abc5fe72 LP |
3105 | |
3106 | return 1; | |
3107 | } | |
3108 | ||
1e05d493 LP |
3109 | static int attach_io_events(sd_bus *bus) { |
3110 | int r; | |
3111 | ||
3112 | assert(bus); | |
3113 | ||
3114 | if (bus->input_fd < 0) | |
3115 | return 0; | |
3116 | ||
3117 | if (!bus->event) | |
3118 | return 0; | |
3119 | ||
3120 | if (!bus->input_io_event_source) { | |
151b9b96 | 3121 | r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus); |
1e05d493 LP |
3122 | if (r < 0) |
3123 | return r; | |
3124 | ||
3125 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
3126 | if (r < 0) | |
3127 | return r; | |
3128 | ||
3129 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
9021bb9f TG |
3130 | if (r < 0) |
3131 | return r; | |
3132 | ||
356779df | 3133 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-input"); |
1e05d493 LP |
3134 | } else |
3135 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
3136 | ||
3137 | if (r < 0) | |
3138 | return r; | |
3139 | ||
3140 | if (bus->output_fd != bus->input_fd) { | |
3141 | assert(bus->output_fd >= 0); | |
3142 | ||
3143 | if (!bus->output_io_event_source) { | |
151b9b96 | 3144 | r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus); |
1e05d493 LP |
3145 | if (r < 0) |
3146 | return r; | |
3147 | ||
3148 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
9021bb9f TG |
3149 | if (r < 0) |
3150 | return r; | |
3151 | ||
356779df | 3152 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-output"); |
1e05d493 LP |
3153 | } else |
3154 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
3155 | ||
3156 | if (r < 0) | |
3157 | return r; | |
3158 | } | |
3159 | ||
3160 | return 0; | |
3161 | } | |
3162 | ||
3163 | static void detach_io_events(sd_bus *bus) { | |
3164 | assert(bus); | |
3165 | ||
3166 | if (bus->input_io_event_source) { | |
3167 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
3168 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
3169 | } | |
3170 | ||
3171 | if (bus->output_io_event_source) { | |
3172 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
3173 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
3174 | } | |
3175 | } | |
3176 | ||
d9f644e2 | 3177 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
3178 | int r; |
3179 | ||
3180 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
3181 | assert_return(!bus->event, -EBUSY); |
3182 | ||
3183 | assert(!bus->input_io_event_source); | |
3184 | assert(!bus->output_io_event_source); | |
3185 | assert(!bus->time_event_source); | |
3186 | ||
76b54375 LP |
3187 | if (event) |
3188 | bus->event = sd_event_ref(event); | |
3189 | else { | |
3190 | r = sd_event_default(&bus->event); | |
3191 | if (r < 0) | |
3192 | return r; | |
3193 | } | |
40ca29a1 | 3194 | |
1e05d493 | 3195 | bus->event_priority = priority; |
40ca29a1 | 3196 | |
6a0f1f6d | 3197 | r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus); |
40ca29a1 LP |
3198 | if (r < 0) |
3199 | goto fail; | |
3200 | ||
3201 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
3202 | if (r < 0) | |
3203 | goto fail; | |
3204 | ||
356779df | 3205 | r = sd_event_source_set_description(bus->time_event_source, "bus-time"); |
9021bb9f TG |
3206 | if (r < 0) |
3207 | goto fail; | |
3208 | ||
151b9b96 | 3209 | r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus); |
abc5fe72 LP |
3210 | if (r < 0) |
3211 | goto fail; | |
3212 | ||
356779df | 3213 | r = sd_event_source_set_description(bus->quit_event_source, "bus-exit"); |
9021bb9f TG |
3214 | if (r < 0) |
3215 | goto fail; | |
3216 | ||
1e05d493 LP |
3217 | r = attach_io_events(bus); |
3218 | if (r < 0) | |
3219 | goto fail; | |
3220 | ||
40ca29a1 LP |
3221 | return 0; |
3222 | ||
3223 | fail: | |
3224 | sd_bus_detach_event(bus); | |
3225 | return r; | |
3226 | } | |
3227 | ||
d9f644e2 | 3228 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 3229 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
3230 | |
3231 | if (!bus->event) | |
3232 | return 0; | |
40ca29a1 | 3233 | |
1e05d493 | 3234 | detach_io_events(bus); |
40ca29a1 | 3235 | |
86befb40 LP |
3236 | if (bus->time_event_source) { |
3237 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 3238 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 3239 | } |
40ca29a1 | 3240 | |
86befb40 LP |
3241 | if (bus->quit_event_source) { |
3242 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 3243 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 3244 | } |
abc5fe72 | 3245 | |
93f1bcf4 | 3246 | bus->event = sd_event_unref(bus->event); |
a82cafb9 | 3247 | return 1; |
40ca29a1 | 3248 | } |
affff0b6 | 3249 | |
2be44176 LP |
3250 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
3251 | assert_return(bus, NULL); | |
3252 | ||
3253 | return bus->event; | |
3254 | } | |
3255 | ||
19befb2d LP |
3256 | _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { |
3257 | assert_return(bus, NULL); | |
3258 | ||
3259 | return bus->current_message; | |
3260 | } | |
3261 | ||
3262 | _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { | |
affff0b6 LP |
3263 | assert_return(bus, NULL); |
3264 | ||
19befb2d | 3265 | return bus->current_slot; |
affff0b6 | 3266 | } |
76b54375 | 3267 | |
caa82984 LP |
3268 | _public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) { |
3269 | assert_return(bus, NULL); | |
3270 | ||
3271 | return bus->current_handler; | |
3272 | } | |
3273 | ||
3274 | _public_ void* sd_bus_get_current_userdata(sd_bus *bus) { | |
3275 | assert_return(bus, NULL); | |
3276 | ||
3277 | return bus->current_userdata; | |
3278 | } | |
3279 | ||
76b54375 LP |
3280 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { |
3281 | sd_bus *b = NULL; | |
3282 | int r; | |
3283 | ||
3284 | assert(bus_open); | |
3285 | assert(default_bus); | |
3286 | ||
3287 | if (!ret) | |
3288 | return !!*default_bus; | |
3289 | ||
3290 | if (*default_bus) { | |
3291 | *ret = sd_bus_ref(*default_bus); | |
3292 | return 0; | |
3293 | } | |
3294 | ||
3295 | r = bus_open(&b); | |
3296 | if (r < 0) | |
3297 | return r; | |
3298 | ||
3299 | b->default_bus_ptr = default_bus; | |
3300 | b->tid = gettid(); | |
3301 | *default_bus = b; | |
3302 | ||
3303 | *ret = b; | |
3304 | return 1; | |
3305 | } | |
3306 | ||
3307 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
ec202eae | 3308 | static thread_local sd_bus *default_system_bus = NULL; |
76b54375 LP |
3309 | |
3310 | return bus_default(sd_bus_open_system, &default_system_bus, ret); | |
3311 | } | |
3312 | ||
3313 | _public_ int sd_bus_default_user(sd_bus **ret) { | |
ec202eae | 3314 | static thread_local sd_bus *default_user_bus = NULL; |
76b54375 LP |
3315 | |
3316 | return bus_default(sd_bus_open_user, &default_user_bus, ret); | |
3317 | } | |
3318 | ||
af08d2f9 LP |
3319 | _public_ int sd_bus_default(sd_bus **ret) { |
3320 | ||
3321 | const char *e; | |
3322 | ||
3323 | /* Let's try our best to reuse another cached connection. If | |
3324 | * the starter bus type is set, connect via our normal | |
3325 | * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that | |
3326 | * we can share the connection with the user/system default | |
3327 | * bus. */ | |
3328 | ||
3329 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
3330 | if (e) { | |
3331 | if (streq(e, "system")) | |
3332 | return sd_bus_default_system(ret); | |
09365592 | 3333 | else if (STR_IN_SET(e, "user", "session")) |
af08d2f9 LP |
3334 | return sd_bus_default_user(ret); |
3335 | } | |
3336 | ||
3337 | /* No type is specified, so we have not other option than to | |
3338 | * use the starter address if it is set. */ | |
3339 | ||
3340 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
3341 | if (e) { | |
3342 | static thread_local sd_bus *default_starter_bus = NULL; | |
3343 | ||
3344 | return bus_default(sd_bus_open, &default_starter_bus, ret); | |
3345 | } | |
3346 | ||
3347 | /* Finally, if nothing is set use the cached connection for | |
3348 | * the right scope */ | |
3349 | ||
3350 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
3351 | return sd_bus_default_user(ret); | |
3352 | else | |
3353 | return sd_bus_default_system(ret); | |
3354 | } | |
3355 | ||
76b54375 LP |
3356 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3357 | assert_return(b, -EINVAL); | |
3358 | assert_return(tid, -EINVAL); | |
3359 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3360 | ||
3361 | if (b->tid != 0) { | |
3362 | *tid = b->tid; | |
3363 | return 0; | |
3364 | } | |
3365 | ||
3366 | if (b->event) | |
3367 | return sd_event_get_tid(b->event, tid); | |
3368 | ||
3369 | return -ENXIO; | |
3370 | } | |
28383ba1 | 3371 | |
a6278b88 LP |
3372 | _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) { |
3373 | _cleanup_free_ char *e = NULL; | |
3374 | char *ret; | |
3375 | ||
3376 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3377 | assert_return(external_id, -EINVAL); | |
3378 | assert_return(ret_path, -EINVAL); | |
3379 | ||
3380 | e = bus_label_escape(external_id); | |
3381 | if (!e) | |
3382 | return -ENOMEM; | |
3383 | ||
3384 | ret = strjoin(prefix, "/", e, NULL); | |
3385 | if (!ret) | |
3386 | return -ENOMEM; | |
3387 | ||
3388 | *ret_path = ret; | |
3389 | return 0; | |
28383ba1 LP |
3390 | } |
3391 | ||
a6278b88 LP |
3392 | _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) { |
3393 | const char *e; | |
3394 | char *ret; | |
3395 | ||
3396 | assert_return(object_path_is_valid(path), -EINVAL); | |
3397 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3398 | assert_return(external_id, -EINVAL); | |
3399 | ||
3400 | e = object_path_startswith(path, prefix); | |
3401 | if (!e) { | |
3402 | *external_id = NULL; | |
3403 | return 0; | |
3404 | } | |
3405 | ||
3406 | ret = bus_label_unescape(e); | |
3407 | if (!ret) | |
3408 | return -ENOMEM; | |
3409 | ||
3410 | *external_id = ret; | |
3411 | return 1; | |
28383ba1 | 3412 | } |
5b12334d | 3413 | |
ae095f86 LP |
3414 | _public_ int sd_bus_try_close(sd_bus *bus) { |
3415 | int r; | |
3416 | ||
3417 | assert_return(bus, -EINVAL); | |
ae095f86 | 3418 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 LP |
3419 | |
3420 | if (!bus->is_kernel) | |
15411c0c | 3421 | return -EOPNOTSUPP; |
a3d59cd1 LP |
3422 | |
3423 | if (!BUS_IS_OPEN(bus->state)) | |
3424 | return -ENOTCONN; | |
ae095f86 | 3425 | |
bd746b8b LP |
3426 | if (bus->rqueue_size > 0) |
3427 | return -EBUSY; | |
3428 | ||
14f862a5 LP |
3429 | if (bus->wqueue_size > 0) |
3430 | return -EBUSY; | |
3431 | ||
ae095f86 LP |
3432 | r = bus_kernel_try_close(bus); |
3433 | if (r < 0) | |
3434 | return r; | |
3435 | ||
3436 | sd_bus_close(bus); | |
3437 | return 0; | |
3438 | } | |
5972fe95 | 3439 | |
455971c1 | 3440 | _public_ int sd_bus_get_description(sd_bus *bus, const char **description) { |
5972fe95 | 3441 | assert_return(bus, -EINVAL); |
455971c1 | 3442 | assert_return(description, -EINVAL); |
f4b2933e | 3443 | assert_return(bus->description, -ENXIO); |
5972fe95 LP |
3444 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3445 | ||
455971c1 | 3446 | *description = bus->description; |
5972fe95 LP |
3447 | return 0; |
3448 | } | |
fe3f22d1 DK |
3449 | |
3450 | int bus_get_root_path(sd_bus *bus) { | |
3451 | int r; | |
3452 | ||
3453 | if (bus->cgroup_root) | |
3454 | return 0; | |
3455 | ||
3456 | r = cg_get_root_path(&bus->cgroup_root); | |
3457 | if (r == -ENOENT) { | |
3458 | bus->cgroup_root = strdup("/"); | |
3459 | if (!bus->cgroup_root) | |
3460 | return -ENOMEM; | |
3461 | ||
3462 | r = 0; | |
3463 | } | |
3464 | ||
3465 | return r; | |
3466 | } | |
3acc1daf LP |
3467 | |
3468 | _public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) { | |
3469 | int r; | |
3470 | ||
3471 | assert_return(bus, -EINVAL); | |
3472 | assert_return(scope, -EINVAL); | |
3473 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3474 | ||
3475 | if (bus->is_kernel) { | |
3476 | _cleanup_free_ char *n = NULL; | |
3477 | const char *dash; | |
3478 | ||
3479 | r = bus_kernel_get_bus_name(bus, &n); | |
3480 | if (r < 0) | |
3481 | return r; | |
3482 | ||
3483 | if (streq(n, "0-system")) { | |
3484 | *scope = "system"; | |
5b820358 | 3485 | return 0; |
3acc1daf LP |
3486 | } |
3487 | ||
3488 | dash = strchr(n, '-'); | |
d2df88ff | 3489 | if (streq_ptr(dash, "-user")) { |
3acc1daf | 3490 | *scope = "user"; |
5b820358 | 3491 | return 0; |
3acc1daf LP |
3492 | } |
3493 | } | |
3494 | ||
3495 | if (bus->is_user) { | |
3496 | *scope = "user"; | |
5b820358 | 3497 | return 0; |
3acc1daf LP |
3498 | } |
3499 | ||
3500 | if (bus->is_system) { | |
3501 | *scope = "system"; | |
5b820358 LP |
3502 | return 0; |
3503 | } | |
3504 | ||
3505 | return -ENODATA; | |
3506 | } | |
3507 | ||
3508 | _public_ int sd_bus_get_address(sd_bus *bus, const char **address) { | |
3509 | ||
3510 | assert_return(bus, -EINVAL); | |
3511 | assert_return(address, -EINVAL); | |
3512 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3513 | ||
3514 | if (bus->address) { | |
3515 | *address = bus->address; | |
3516 | return 0; | |
3acc1daf LP |
3517 | } |
3518 | ||
3519 | return -ENODATA; | |
3520 | } | |
224b3787 | 3521 | |
882897af | 3522 | _public_ int sd_bus_get_creds_mask(sd_bus *bus, uint64_t *mask) { |
224b3787 LP |
3523 | assert_return(bus, -EINVAL); |
3524 | assert_return(mask, -EINVAL); | |
3525 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3526 | ||
3527 | *mask = bus->creds_mask; | |
3528 | return 0; | |
3529 | } | |
3530 | ||
882897af | 3531 | _public_ int sd_bus_is_bus_client(sd_bus *bus) { |
224b3787 LP |
3532 | assert_return(bus, -EINVAL); |
3533 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3534 | ||
3535 | return bus->bus_client; | |
3536 | } | |
3537 | ||
882897af | 3538 | _public_ int sd_bus_is_server(sd_bus *bus) { |
224b3787 LP |
3539 | assert_return(bus, -EINVAL); |
3540 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3541 | ||
3542 | return bus->is_server; | |
3543 | } | |
3544 | ||
882897af | 3545 | _public_ int sd_bus_is_anonymous(sd_bus *bus) { |
224b3787 LP |
3546 | assert_return(bus, -EINVAL); |
3547 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3548 | ||
3549 | return bus->anonymous_auth; | |
3550 | } | |
3551 | ||
882897af | 3552 | _public_ int sd_bus_is_trusted(sd_bus *bus) { |
224b3787 LP |
3553 | assert_return(bus, -EINVAL); |
3554 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3555 | ||
3556 | return bus->trusted; | |
3557 | } | |
3558 | ||
882897af | 3559 | _public_ int sd_bus_is_monitor(sd_bus *bus) { |
224b3787 LP |
3560 | assert_return(bus, -EINVAL); |
3561 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3562 | ||
3563 | return !!(bus->hello_flags & KDBUS_HELLO_MONITOR); | |
3564 | } |