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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 <errno.h> | |
2c93b4ef | 23 | #include <fcntl.h> |
bc7fd8cd | 24 | #include <sys/mman.h> |
de1c301e LP |
25 | |
26 | #include "util.h" | |
9a17484d | 27 | #include "utf8.h" |
89ffcd2a | 28 | #include "strv.h" |
6629161f | 29 | #include "time-util.h" |
d8d3d8a7 | 30 | #include "cgroup-util.h" |
de1c301e | 31 | |
de1c301e | 32 | #include "sd-bus.h" |
9a17484d | 33 | #include "bus-message.h" |
de1c301e LP |
34 | #include "bus-internal.h" |
35 | #include "bus-type.h" | |
36 | #include "bus-signature.h" | |
37 | ||
80a46c73 | 38 | static int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored); |
de1c301e | 39 | |
bc7fd8cd LP |
40 | static void *adjust_pointer(const void *p, void *old_base, size_t sz, void *new_base) { |
41 | ||
42 | if (p == NULL) | |
43 | return NULL; | |
44 | ||
45 | if (old_base == new_base) | |
46 | return (void*) p; | |
47 | ||
48 | if ((uint8_t*) p < (uint8_t*) old_base) | |
49 | return (void*) p; | |
50 | ||
51 | if ((uint8_t*) p >= (uint8_t*) old_base + sz) | |
52 | return (void*) p; | |
53 | ||
54 | return (uint8_t*) new_base + ((uint8_t*) p - (uint8_t*) old_base); | |
55 | } | |
56 | ||
57 | static void message_free_part(sd_bus_message *m, struct bus_body_part *part) { | |
58 | assert(m); | |
59 | assert(part); | |
60 | ||
61 | if (part->memfd >= 0) { | |
66b26c5c LP |
62 | /* If we can reuse the memfd, try that. For that it |
63 | * can't be sealed yet. */ | |
bc7fd8cd LP |
64 | |
65 | if (!part->sealed) | |
66 | bus_kernel_push_memfd(m->bus, part->memfd, part->data, part->mapped); | |
67 | else { | |
89b4fc46 LP |
68 | if (part->mapped > 0) |
69 | assert_se(munmap(part->data, part->mapped) == 0); | |
bc7fd8cd LP |
70 | |
71 | close_nointr_nofail(part->memfd); | |
72 | } | |
73 | ||
453a0c29 LP |
74 | } else if (part->munmap_this) |
75 | munmap(part->data, part->mapped); | |
76 | else if (part->free_this) | |
bc7fd8cd LP |
77 | free(part->data); |
78 | ||
79 | if (part != &m->body) | |
80 | free(part); | |
81 | } | |
82 | ||
83 | static void message_reset_parts(sd_bus_message *m) { | |
84 | struct bus_body_part *part; | |
85 | ||
86 | assert(m); | |
87 | ||
88 | part = &m->body; | |
89 | while (m->n_body_parts > 0) { | |
90 | struct bus_body_part *next = part->next; | |
91 | message_free_part(m, part); | |
92 | part = next; | |
93 | m->n_body_parts--; | |
94 | } | |
95 | ||
96 | m->body_end = NULL; | |
97 | ||
98 | m->cached_rindex_part = NULL; | |
99 | m->cached_rindex_part_begin = 0; | |
100 | } | |
101 | ||
102 | static void message_reset_containers(sd_bus_message *m) { | |
9a17484d LP |
103 | unsigned i; |
104 | ||
105 | assert(m); | |
106 | ||
107 | for (i = 0; i < m->n_containers; i++) | |
108 | free(m->containers[i].signature); | |
109 | ||
110 | free(m->containers); | |
111 | m->containers = NULL; | |
112 | ||
113 | m->n_containers = 0; | |
114 | m->root_container.index = 0; | |
115 | } | |
116 | ||
de1c301e | 117 | static void message_free(sd_bus_message *m) { |
de1c301e LP |
118 | assert(m); |
119 | ||
120 | if (m->free_header) | |
121 | free(m->header); | |
122 | ||
bc7fd8cd | 123 | message_reset_parts(m); |
de1c301e | 124 | |
6629161f LP |
125 | if (m->free_kdbus) |
126 | free(m->kdbus); | |
127 | ||
62b3e928 KS |
128 | if (m->release_kdbus) { |
129 | uint64_t off; | |
130 | ||
131 | off = (uint8_t *)m->kdbus - (uint8_t *)m->bus->kdbus_buffer; | |
132 | ioctl(m->bus->input_fd, KDBUS_CMD_MSG_RELEASE, &off); | |
133 | } | |
fd8d62d9 | 134 | |
f54514f3 LP |
135 | if (m->bus) |
136 | sd_bus_unref(m->bus); | |
137 | ||
2c93b4ef LP |
138 | if (m->free_fds) { |
139 | close_many(m->fds, m->n_fds); | |
140 | free(m->fds); | |
141 | } | |
de1c301e | 142 | |
bc7fd8cd LP |
143 | if (m->iovec != m->iovec_fixed) |
144 | free(m->iovec); | |
145 | ||
77930f11 LP |
146 | free(m->cmdline_array); |
147 | ||
bc7fd8cd | 148 | message_reset_containers(m); |
9a17484d | 149 | free(m->root_container.signature); |
de1c301e | 150 | |
9a17484d | 151 | free(m->peeked_signature); |
d8d3d8a7 LP |
152 | |
153 | free(m->unit); | |
154 | free(m->user_unit); | |
155 | free(m->session); | |
de1c301e LP |
156 | free(m); |
157 | } | |
158 | ||
c91cb83c LP |
159 | static void *message_extend_fields(sd_bus_message *m, size_t align, size_t sz) { |
160 | void *op, *np; | |
161 | size_t old_size, new_size, start; | |
de1c301e | 162 | |
c91cb83c | 163 | assert(m); |
de1c301e | 164 | |
c91cb83c | 165 | if (m->poisoned) |
de1c301e LP |
166 | return NULL; |
167 | ||
c91cb83c LP |
168 | old_size = sizeof(struct bus_header) + m->header->fields_size; |
169 | start = ALIGN_TO(old_size, align); | |
170 | new_size = start + sz; | |
de1c301e | 171 | |
c91cb83c LP |
172 | if (old_size == new_size) |
173 | return (uint8_t*) m->header + old_size; | |
de1c301e | 174 | |
c91cb83c LP |
175 | if (new_size > (size_t) ((uint32_t) -1)) |
176 | goto poison; | |
de1c301e | 177 | |
c91cb83c LP |
178 | if (m->free_header) { |
179 | np = realloc(m->header, ALIGN8(new_size)); | |
180 | if (!np) | |
181 | goto poison; | |
182 | } else { | |
183 | /* Initially, the header is allocated as part of of | |
184 | * the sd_bus_message itself, let's replace it by | |
185 | * dynamic data */ | |
de1c301e | 186 | |
c91cb83c LP |
187 | np = malloc(ALIGN8(new_size)); |
188 | if (!np) | |
189 | goto poison; | |
de1c301e | 190 | |
c91cb83c LP |
191 | memcpy(np, m->header, sizeof(struct bus_header)); |
192 | } | |
de1c301e | 193 | |
c91cb83c LP |
194 | /* Zero out padding */ |
195 | if (start > old_size) | |
196 | memset((uint8_t*) np + old_size, 0, start - old_size); | |
bc7fd8cd | 197 | |
c91cb83c LP |
198 | op = m->header; |
199 | m->header = np; | |
200 | m->header->fields_size = new_size - sizeof(struct bus_header); | |
de1c301e | 201 | |
bc7fd8cd | 202 | /* Adjust quick access pointers */ |
c91cb83c LP |
203 | m->path = adjust_pointer(m->path, op, old_size, m->header); |
204 | m->interface = adjust_pointer(m->interface, op, old_size, m->header); | |
205 | m->member = adjust_pointer(m->member, op, old_size, m->header); | |
206 | m->destination = adjust_pointer(m->destination, op, old_size, m->header); | |
207 | m->sender = adjust_pointer(m->sender, op, old_size, m->header); | |
208 | m->error.name = adjust_pointer(m->error.name, op, old_size, m->header); | |
bc7fd8cd | 209 | |
c91cb83c | 210 | m->free_header = true; |
de1c301e | 211 | |
c91cb83c LP |
212 | return (uint8_t*) np + start; |
213 | ||
214 | poison: | |
215 | m->poisoned = true; | |
216 | return NULL; | |
de1c301e LP |
217 | } |
218 | ||
219 | static int message_append_field_string( | |
220 | sd_bus_message *m, | |
221 | uint8_t h, | |
222 | char type, | |
223 | const char *s, | |
224 | const char **ret) { | |
225 | ||
226 | size_t l; | |
227 | uint8_t *p; | |
228 | ||
229 | assert(m); | |
230 | ||
231 | l = strlen(s); | |
232 | if (l > (size_t) (uint32_t) -1) | |
233 | return -EINVAL; | |
234 | ||
235 | /* field id byte + signature length + signature 's' + NUL + string length + string + NUL */ | |
236 | p = message_extend_fields(m, 8, 4 + 4 + l + 1); | |
237 | if (!p) | |
238 | return -ENOMEM; | |
239 | ||
240 | p[0] = h; | |
241 | p[1] = 1; | |
242 | p[2] = type; | |
243 | p[3] = 0; | |
244 | ||
245 | ((uint32_t*) p)[1] = l; | |
246 | memcpy(p + 8, s, l + 1); | |
247 | ||
248 | if (ret) | |
bc7fd8cd | 249 | *ret = (char*) p + 8; |
de1c301e LP |
250 | |
251 | return 0; | |
252 | } | |
253 | ||
254 | static int message_append_field_signature( | |
255 | sd_bus_message *m, | |
256 | uint8_t h, | |
257 | const char *s, | |
258 | const char **ret) { | |
259 | ||
260 | size_t l; | |
261 | uint8_t *p; | |
262 | ||
263 | assert(m); | |
264 | ||
265 | l = strlen(s); | |
266 | if (l > 255) | |
267 | return -EINVAL; | |
268 | ||
269 | /* field id byte + signature length + signature 'g' + NUL + string length + string + NUL */ | |
270 | p = message_extend_fields(m, 8, 4 + 1 + l + 1); | |
271 | if (!p) | |
272 | return -ENOMEM; | |
273 | ||
274 | p[0] = h; | |
275 | p[1] = 1; | |
276 | p[2] = SD_BUS_TYPE_SIGNATURE; | |
277 | p[3] = 0; | |
278 | p[4] = l; | |
279 | memcpy(p + 5, s, l + 1); | |
280 | ||
281 | if (ret) | |
282 | *ret = (const char*) p + 5; | |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
287 | static int message_append_field_uint32(sd_bus_message *m, uint8_t h, uint32_t x) { | |
288 | uint8_t *p; | |
289 | ||
290 | assert(m); | |
291 | ||
292 | /* field id byte + signature length + signature 'u' + NUL + value */ | |
293 | p = message_extend_fields(m, 8, 4 + 4); | |
294 | if (!p) | |
295 | return -ENOMEM; | |
296 | ||
297 | p[0] = h; | |
298 | p[1] = 1; | |
299 | p[2] = SD_BUS_TYPE_UINT32; | |
300 | p[3] = 0; | |
301 | ||
302 | ((uint32_t*) p)[1] = x; | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
6629161f | 307 | int bus_message_from_header( |
2571ead1 LP |
308 | void *buffer, |
309 | size_t length, | |
2c93b4ef LP |
310 | int *fds, |
311 | unsigned n_fds, | |
312 | const struct ucred *ucred, | |
2571ead1 | 313 | const char *label, |
6629161f | 314 | size_t extra, |
2571ead1 LP |
315 | sd_bus_message **ret) { |
316 | ||
80a46c73 LP |
317 | sd_bus_message *m; |
318 | struct bus_header *h; | |
6629161f | 319 | size_t a, label_sz; |
80a46c73 LP |
320 | |
321 | assert(buffer || length <= 0); | |
2c93b4ef | 322 | assert(fds || n_fds <= 0); |
80a46c73 LP |
323 | assert(ret); |
324 | ||
325 | if (length < sizeof(struct bus_header)) | |
326 | return -EBADMSG; | |
327 | ||
328 | h = buffer; | |
329 | if (h->version != 1) | |
330 | return -EBADMSG; | |
331 | ||
332 | if (h->serial == 0) | |
333 | return -EBADMSG; | |
334 | ||
335 | if (h->type == _SD_BUS_MESSAGE_TYPE_INVALID) | |
336 | return -EBADMSG; | |
337 | ||
6629161f LP |
338 | if (h->endian != SD_BUS_LITTLE_ENDIAN && |
339 | h->endian != SD_BUS_BIG_ENDIAN) | |
80a46c73 LP |
340 | return -EBADMSG; |
341 | ||
6629161f | 342 | a = ALIGN(sizeof(sd_bus_message)) + ALIGN(extra); |
80a46c73 | 343 | |
2571ead1 LP |
344 | if (label) { |
345 | label_sz = strlen(label); | |
6629161f LP |
346 | a += label_sz + 1; |
347 | } | |
2571ead1 LP |
348 | |
349 | m = malloc0(a); | |
80a46c73 LP |
350 | if (!m) |
351 | return -ENOMEM; | |
352 | ||
353 | m->n_ref = 1; | |
2c93b4ef | 354 | m->sealed = true; |
80a46c73 | 355 | m->header = h; |
2c93b4ef LP |
356 | m->fds = fds; |
357 | m->n_fds = n_fds; | |
80a46c73 | 358 | |
2571ead1 LP |
359 | if (ucred) { |
360 | m->uid = ucred->uid; | |
361 | m->pid = ucred->pid; | |
362 | m->gid = ucred->gid; | |
363 | m->uid_valid = m->gid_valid = true; | |
364 | } | |
365 | ||
366 | if (label) { | |
6629161f | 367 | m->label = (char*) m + ALIGN(sizeof(sd_bus_message)) + ALIGN(extra); |
2571ead1 LP |
368 | memcpy(m->label, label, label_sz + 1); |
369 | } | |
370 | ||
6629161f LP |
371 | *ret = m; |
372 | return 0; | |
373 | } | |
374 | ||
375 | int bus_message_from_malloc( | |
376 | void *buffer, | |
377 | size_t length, | |
378 | int *fds, | |
379 | unsigned n_fds, | |
380 | const struct ucred *ucred, | |
381 | const char *label, | |
382 | sd_bus_message **ret) { | |
383 | ||
384 | sd_bus_message *m; | |
385 | int r; | |
386 | ||
387 | r = bus_message_from_header(buffer, length, fds, n_fds, ucred, label, 0, &m); | |
388 | if (r < 0) | |
389 | return r; | |
390 | ||
391 | if (length != BUS_MESSAGE_SIZE(m)) { | |
392 | r = -EBADMSG; | |
393 | goto fail; | |
394 | } | |
395 | ||
bc7fd8cd LP |
396 | m->n_body_parts = 1; |
397 | m->body.data = (uint8_t*) buffer + sizeof(struct bus_header) + ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)); | |
398 | m->body.size = length - sizeof(struct bus_header) - ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)); | |
399 | m->body.sealed = true; | |
400 | m->body.memfd = -1; | |
6629161f | 401 | |
80a46c73 | 402 | m->n_iovec = 1; |
bc7fd8cd | 403 | m->iovec = m->iovec_fixed; |
80a46c73 LP |
404 | m->iovec[0].iov_base = buffer; |
405 | m->iovec[0].iov_len = length; | |
406 | ||
6629161f | 407 | r = bus_message_parse_fields(m); |
2c93b4ef LP |
408 | if (r < 0) |
409 | goto fail; | |
410 | ||
411 | /* We take possession of the memory and fds now */ | |
412 | m->free_header = true; | |
413 | m->free_fds = true; | |
80a46c73 LP |
414 | |
415 | *ret = m; | |
416 | return 0; | |
2c93b4ef LP |
417 | |
418 | fail: | |
419 | message_free(m); | |
420 | return r; | |
80a46c73 LP |
421 | } |
422 | ||
de1c301e LP |
423 | static sd_bus_message *message_new(sd_bus *bus, uint8_t type) { |
424 | sd_bus_message *m; | |
425 | ||
80a46c73 | 426 | m = malloc0(ALIGN(sizeof(sd_bus_message)) + sizeof(struct bus_header)); |
de1c301e LP |
427 | if (!m) |
428 | return NULL; | |
429 | ||
430 | m->n_ref = 1; | |
431 | m->header = (struct bus_header*) ((uint8_t*) m + ALIGN(sizeof(struct sd_bus_message))); | |
80a46c73 | 432 | m->header->endian = SD_BUS_NATIVE_ENDIAN; |
de1c301e LP |
433 | m->header->type = type; |
434 | m->header->version = bus ? bus->message_version : 1; | |
021a1e78 | 435 | m->allow_fds = !bus || bus->can_fds || (bus->state != BUS_HELLO && bus->state != BUS_RUNNING); |
de1c301e | 436 | |
9b05bc48 LP |
437 | if (bus) |
438 | m->bus = sd_bus_ref(bus); | |
439 | ||
de1c301e LP |
440 | return m; |
441 | } | |
442 | ||
d9f644e2 | 443 | _public_ int sd_bus_message_new_signal( |
de1c301e LP |
444 | sd_bus *bus, |
445 | const char *path, | |
446 | const char *interface, | |
447 | const char *member, | |
448 | sd_bus_message **m) { | |
449 | ||
450 | sd_bus_message *t; | |
451 | int r; | |
452 | ||
9d6c7c82 LP |
453 | assert_return(!bus || bus->state != BUS_UNSET, -ENOTCONN); |
454 | assert_return(object_path_is_valid(path), -EINVAL); | |
455 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
456 | assert_return(member_name_is_valid(member), -EINVAL); | |
457 | assert_return(m, -EINVAL); | |
de1c301e | 458 | |
40ca29a1 | 459 | t = message_new(bus, SD_BUS_MESSAGE_SIGNAL); |
de1c301e LP |
460 | if (!t) |
461 | return -ENOMEM; | |
462 | ||
89ffcd2a LP |
463 | t->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; |
464 | ||
de1c301e LP |
465 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path); |
466 | if (r < 0) | |
467 | goto fail; | |
468 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_INTERFACE, SD_BUS_TYPE_STRING, interface, &t->interface); | |
469 | if (r < 0) | |
470 | goto fail; | |
471 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_MEMBER, SD_BUS_TYPE_STRING, member, &t->member); | |
472 | if (r < 0) | |
473 | goto fail; | |
474 | ||
475 | *m = t; | |
476 | return 0; | |
477 | ||
478 | fail: | |
479 | sd_bus_message_unref(t); | |
480 | return r; | |
481 | } | |
482 | ||
d9f644e2 | 483 | _public_ int sd_bus_message_new_method_call( |
de1c301e LP |
484 | sd_bus *bus, |
485 | const char *destination, | |
486 | const char *path, | |
487 | const char *interface, | |
488 | const char *member, | |
489 | sd_bus_message **m) { | |
490 | ||
491 | sd_bus_message *t; | |
492 | int r; | |
493 | ||
9d6c7c82 LP |
494 | assert_return(!bus || bus->state != BUS_UNSET, -ENOTCONN); |
495 | assert_return(!destination || service_name_is_valid(destination), -EINVAL); | |
496 | assert_return(object_path_is_valid(path), -EINVAL); | |
497 | assert_return(!interface || interface_name_is_valid(interface), -EINVAL); | |
498 | assert_return(member_name_is_valid(member), -EINVAL); | |
499 | assert_return(m, -EINVAL); | |
de1c301e | 500 | |
40ca29a1 | 501 | t = message_new(bus, SD_BUS_MESSAGE_METHOD_CALL); |
de1c301e LP |
502 | if (!t) |
503 | return -ENOMEM; | |
504 | ||
505 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path); | |
506 | if (r < 0) | |
507 | goto fail; | |
508 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_MEMBER, SD_BUS_TYPE_STRING, member, &t->member); | |
509 | if (r < 0) | |
510 | goto fail; | |
511 | ||
512 | if (interface) { | |
513 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_INTERFACE, SD_BUS_TYPE_STRING, interface, &t->interface); | |
514 | if (r < 0) | |
515 | goto fail; | |
516 | } | |
517 | ||
518 | if (destination) { | |
519 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &t->destination); | |
520 | if (r < 0) | |
521 | goto fail; | |
522 | } | |
523 | ||
524 | *m = t; | |
525 | return 0; | |
526 | ||
527 | fail: | |
528 | message_free(t); | |
529 | return r; | |
530 | } | |
531 | ||
5407f2de | 532 | static int message_new_reply( |
de1c301e LP |
533 | sd_bus *bus, |
534 | sd_bus_message *call, | |
5407f2de | 535 | uint8_t type, |
de1c301e LP |
536 | sd_bus_message **m) { |
537 | ||
538 | sd_bus_message *t; | |
539 | int r; | |
540 | ||
9d6c7c82 LP |
541 | assert_return(!bus || bus->state != BUS_UNSET, -ENOTCONN); |
542 | assert_return(call, -EINVAL); | |
543 | assert_return(call->sealed, -EPERM); | |
544 | assert_return(call->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); | |
545 | assert_return(m, -EINVAL); | |
de1c301e | 546 | |
5407f2de | 547 | t = message_new(bus, type); |
de1c301e LP |
548 | if (!t) |
549 | return -ENOMEM; | |
550 | ||
89ffcd2a | 551 | t->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; |
de1c301e | 552 | t->reply_serial = BUS_MESSAGE_SERIAL(call); |
5407f2de | 553 | |
de1c301e LP |
554 | r = message_append_field_uint32(t, SD_BUS_MESSAGE_HEADER_REPLY_SERIAL, t->reply_serial); |
555 | if (r < 0) | |
556 | goto fail; | |
557 | ||
558 | if (call->sender) { | |
8f155917 | 559 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, call->sender, &t->destination); |
de1c301e LP |
560 | if (r < 0) |
561 | goto fail; | |
562 | } | |
563 | ||
5407f2de LP |
564 | t->dont_send = !!(call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED); |
565 | ||
de1c301e | 566 | *m = t; |
89ffcd2a | 567 | return 0; |
de1c301e LP |
568 | |
569 | fail: | |
570 | message_free(t); | |
571 | return r; | |
572 | } | |
573 | ||
d9f644e2 | 574 | _public_ int sd_bus_message_new_method_return( |
5407f2de LP |
575 | sd_bus *bus, |
576 | sd_bus_message *call, | |
577 | sd_bus_message **m) { | |
578 | ||
40ca29a1 | 579 | return message_new_reply(bus, call, SD_BUS_MESSAGE_METHOD_RETURN, m); |
5407f2de LP |
580 | } |
581 | ||
d9f644e2 | 582 | _public_ int sd_bus_message_new_method_error( |
de1c301e LP |
583 | sd_bus *bus, |
584 | sd_bus_message *call, | |
585 | const sd_bus_error *e, | |
586 | sd_bus_message **m) { | |
587 | ||
588 | sd_bus_message *t; | |
589 | int r; | |
590 | ||
9d6c7c82 LP |
591 | assert_return(sd_bus_error_is_set(e), -EINVAL); |
592 | assert_return(m, -EINVAL); | |
de1c301e | 593 | |
40ca29a1 | 594 | r = message_new_reply(bus, call, SD_BUS_MESSAGE_METHOD_ERROR, &t); |
de1c301e | 595 | if (r < 0) |
5407f2de | 596 | return r; |
de1c301e LP |
597 | |
598 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name); | |
599 | if (r < 0) | |
600 | goto fail; | |
601 | ||
602 | if (e->message) { | |
603 | r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message); | |
604 | if (r < 0) | |
605 | goto fail; | |
606 | } | |
607 | ||
608 | *m = t; | |
609 | return 0; | |
610 | ||
611 | fail: | |
612 | message_free(t); | |
613 | return r; | |
614 | } | |
615 | ||
d9f644e2 | 616 | _public_ int sd_bus_message_new_method_errorf( |
29ddb38f LP |
617 | sd_bus *bus, |
618 | sd_bus_message *call, | |
619 | sd_bus_message **m, | |
620 | const char *name, | |
621 | const char *format, | |
622 | ...) { | |
623 | ||
40ca29a1 | 624 | _cleanup_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
29ddb38f LP |
625 | va_list ap; |
626 | int r; | |
627 | ||
40ca29a1 LP |
628 | assert_return(name, -EINVAL); |
629 | assert_return(m, -EINVAL); | |
630 | ||
631 | va_start(ap, format); | |
632 | r = bus_error_setfv(&error, name, format, ap); | |
633 | va_end(ap); | |
29ddb38f | 634 | |
29ddb38f LP |
635 | if (r < 0) |
636 | return r; | |
637 | ||
40ca29a1 LP |
638 | return sd_bus_message_new_method_error(bus, call, &error, m); |
639 | } | |
29ddb38f | 640 | |
d9f644e2 | 641 | _public_ int sd_bus_message_new_method_errno( |
40ca29a1 LP |
642 | sd_bus *bus, |
643 | sd_bus_message *call, | |
644 | int error, | |
645 | const sd_bus_error *p, | |
646 | sd_bus_message **m) { | |
29ddb38f | 647 | |
40ca29a1 | 648 | _cleanup_free_ sd_bus_error berror = SD_BUS_ERROR_NULL; |
29ddb38f | 649 | |
40ca29a1 LP |
650 | if (sd_bus_error_is_set(p)) |
651 | return sd_bus_message_new_method_error(bus, call, p, m); | |
29ddb38f | 652 | |
40ca29a1 | 653 | sd_bus_error_set_errno(&berror, error); |
29ddb38f | 654 | |
40ca29a1 LP |
655 | return sd_bus_message_new_method_error(bus, call, &berror, m); |
656 | } | |
29ddb38f | 657 | |
d9f644e2 | 658 | _public_ int sd_bus_message_new_method_errnof( |
40ca29a1 LP |
659 | sd_bus *bus, |
660 | sd_bus_message *call, | |
661 | sd_bus_message **m, | |
662 | int error, | |
663 | const char *format, | |
664 | ...) { | |
665 | ||
666 | _cleanup_free_ sd_bus_error berror = SD_BUS_ERROR_NULL; | |
667 | va_list ap; | |
668 | int r; | |
669 | ||
670 | va_start(ap, format); | |
671 | r = bus_error_set_errnofv(&berror, error, format, ap); | |
672 | va_end(ap); | |
673 | ||
674 | if (r < 0) | |
675 | return r; | |
676 | ||
677 | return sd_bus_message_new_method_error(bus, call, &berror, m); | |
29ddb38f LP |
678 | } |
679 | ||
eb01ba5d LP |
680 | int bus_message_new_synthetic_error( |
681 | sd_bus *bus, | |
682 | uint64_t serial, | |
683 | const sd_bus_error *e, | |
684 | sd_bus_message **m) { | |
685 | ||
686 | sd_bus_message *t; | |
687 | int r; | |
688 | ||
689 | assert(sd_bus_error_is_set(e)); | |
690 | assert(m); | |
691 | ||
40ca29a1 | 692 | t = message_new(bus, SD_BUS_MESSAGE_METHOD_ERROR); |
eb01ba5d LP |
693 | if (!t) |
694 | return -ENOMEM; | |
695 | ||
696 | t->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; | |
697 | t->reply_serial = serial; | |
698 | ||
699 | r = message_append_field_uint32(t, SD_BUS_MESSAGE_HEADER_REPLY_SERIAL, t->reply_serial); | |
700 | if (r < 0) | |
701 | goto fail; | |
702 | ||
703 | if (bus && bus->unique_name) { | |
704 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, bus->unique_name, &t->destination); | |
705 | if (r < 0) | |
706 | goto fail; | |
707 | } | |
708 | ||
3a7d4f1b LP |
709 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name); |
710 | if (r < 0) | |
711 | goto fail; | |
712 | ||
713 | if (e->message) { | |
714 | r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message); | |
715 | if (r < 0) | |
716 | goto fail; | |
717 | } | |
718 | ||
eb01ba5d LP |
719 | *m = t; |
720 | return 0; | |
721 | ||
722 | fail: | |
723 | message_free(t); | |
724 | return r; | |
725 | } | |
726 | ||
d9f644e2 | 727 | _public_ sd_bus_message* sd_bus_message_ref(sd_bus_message *m) { |
9d6c7c82 | 728 | assert_return(m, NULL); |
de1c301e LP |
729 | |
730 | assert(m->n_ref > 0); | |
731 | m->n_ref++; | |
732 | ||
733 | return m; | |
734 | } | |
735 | ||
d9f644e2 | 736 | _public_ sd_bus_message* sd_bus_message_unref(sd_bus_message *m) { |
9d6c7c82 | 737 | assert_return(m, NULL); |
de1c301e LP |
738 | |
739 | assert(m->n_ref > 0); | |
740 | m->n_ref--; | |
741 | ||
742 | if (m->n_ref <= 0) | |
743 | message_free(m); | |
744 | ||
745 | return NULL; | |
746 | } | |
747 | ||
d9f644e2 | 748 | _public_ int sd_bus_message_get_type(sd_bus_message *m, uint8_t *type) { |
9d6c7c82 LP |
749 | assert_return(m, -EINVAL); |
750 | assert_return(type, -EINVAL); | |
de1c301e LP |
751 | |
752 | *type = m->header->type; | |
753 | return 0; | |
754 | } | |
755 | ||
d9f644e2 | 756 | _public_ int sd_bus_message_get_serial(sd_bus_message *m, uint64_t *serial) { |
9d6c7c82 LP |
757 | assert_return(m, -EINVAL); |
758 | assert_return(serial, -EINVAL); | |
759 | assert_return(m->header->serial != 0, -ENOENT); | |
de1c301e LP |
760 | |
761 | *serial = BUS_MESSAGE_SERIAL(m); | |
762 | return 0; | |
763 | } | |
764 | ||
d9f644e2 | 765 | _public_ int sd_bus_message_get_reply_serial(sd_bus_message *m, uint64_t *serial) { |
9d6c7c82 LP |
766 | assert_return(m, -EINVAL); |
767 | assert_return(serial, -EINVAL); | |
768 | assert_return(m->reply_serial != 0, -ENOENT); | |
de1c301e LP |
769 | |
770 | *serial = m->reply_serial; | |
771 | return 0; | |
772 | } | |
773 | ||
d9f644e2 | 774 | _public_ int sd_bus_message_get_no_reply(sd_bus_message *m) { |
9d6c7c82 | 775 | assert_return(m, -EINVAL); |
de1c301e | 776 | |
40ca29a1 | 777 | return m->header->type == SD_BUS_MESSAGE_METHOD_CALL ? !!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) : 0; |
de1c301e LP |
778 | } |
779 | ||
1fee9de5 LP |
780 | _public_ int sd_bus_message_get_no_auto_start(sd_bus_message *m) { |
781 | assert_return(m, -EINVAL); | |
782 | ||
783 | return !!(m->header->flags & SD_BUS_MESSAGE_NO_AUTO_START); | |
784 | } | |
785 | ||
d9f644e2 | 786 | _public_ const char *sd_bus_message_get_path(sd_bus_message *m) { |
9d6c7c82 | 787 | assert_return(m, NULL); |
de1c301e LP |
788 | |
789 | return m->path; | |
790 | } | |
791 | ||
d9f644e2 | 792 | _public_ const char *sd_bus_message_get_interface(sd_bus_message *m) { |
9d6c7c82 | 793 | assert_return(m, NULL); |
de1c301e LP |
794 | |
795 | return m->interface; | |
796 | } | |
797 | ||
d9f644e2 | 798 | _public_ const char *sd_bus_message_get_member(sd_bus_message *m) { |
9d6c7c82 | 799 | assert_return(m, NULL); |
de1c301e LP |
800 | |
801 | return m->member; | |
802 | } | |
d9f644e2 ZJS |
803 | |
804 | _public_ const char *sd_bus_message_get_destination(sd_bus_message *m) { | |
9d6c7c82 | 805 | assert_return(m, NULL); |
de1c301e LP |
806 | |
807 | return m->destination; | |
808 | } | |
809 | ||
d9f644e2 | 810 | _public_ const char *sd_bus_message_get_sender(sd_bus_message *m) { |
9d6c7c82 | 811 | assert_return(m, NULL); |
de1c301e LP |
812 | |
813 | return m->sender; | |
814 | } | |
815 | ||
d9f644e2 | 816 | _public_ const sd_bus_error *sd_bus_message_get_error(sd_bus_message *m) { |
9d6c7c82 LP |
817 | assert_return(m, NULL); |
818 | assert_return(sd_bus_error_is_set(&m->error), NULL); | |
de1c301e LP |
819 | |
820 | return &m->error; | |
821 | } | |
822 | ||
d9f644e2 | 823 | _public_ int sd_bus_message_get_uid(sd_bus_message *m, uid_t *uid) { |
9d6c7c82 LP |
824 | assert_return(m, -EINVAL); |
825 | assert_return(uid, -EINVAL); | |
826 | assert_return(m->uid_valid, -ESRCH); | |
de1c301e LP |
827 | |
828 | *uid = m->uid; | |
829 | return 0; | |
830 | } | |
831 | ||
d9f644e2 | 832 | _public_ int sd_bus_message_get_gid(sd_bus_message *m, gid_t *gid) { |
9d6c7c82 LP |
833 | assert_return(m, -EINVAL); |
834 | assert_return(gid, -EINVAL); | |
835 | assert_return(m->gid_valid, -ESRCH); | |
de1c301e LP |
836 | |
837 | *gid = m->gid; | |
838 | return 0; | |
839 | } | |
840 | ||
d9f644e2 | 841 | _public_ int sd_bus_message_get_pid(sd_bus_message *m, pid_t *pid) { |
9d6c7c82 LP |
842 | assert_return(m, -EINVAL); |
843 | assert_return(pid, -EINVAL); | |
844 | assert_return(m->pid > 0, -ESRCH); | |
de1c301e LP |
845 | |
846 | *pid = m->pid; | |
847 | return 0; | |
848 | } | |
849 | ||
d9f644e2 | 850 | _public_ int sd_bus_message_get_tid(sd_bus_message *m, pid_t *tid) { |
9d6c7c82 LP |
851 | assert_return(m, -EINVAL); |
852 | assert_return(tid, -EINVAL); | |
853 | assert_return(m->tid > 0, -ESRCH); | |
de1c301e LP |
854 | |
855 | *tid = m->tid; | |
856 | return 0; | |
857 | } | |
858 | ||
d9f644e2 | 859 | _public_ int sd_bus_message_get_pid_starttime(sd_bus_message *m, uint64_t *usec) { |
9d6c7c82 LP |
860 | assert_return(m, -EINVAL); |
861 | assert_return(usec, -EINVAL); | |
862 | assert_return(m->pid_starttime > 0, -ESRCH); | |
8323bc1f LP |
863 | |
864 | *usec = m->pid_starttime; | |
865 | return 0; | |
866 | } | |
867 | ||
d9f644e2 | 868 | _public_ int sd_bus_message_get_selinux_context(sd_bus_message *m, const char **ret) { |
9d6c7c82 LP |
869 | assert_return(m, -EINVAL); |
870 | assert_return(m->label, -ESRCH); | |
2571ead1 | 871 | |
4a875b61 LP |
872 | *ret = m->label; |
873 | return 0; | |
2571ead1 LP |
874 | } |
875 | ||
d9f644e2 | 876 | _public_ int sd_bus_message_get_monotonic_timestamp(sd_bus_message *m, uint64_t *usec) { |
9d6c7c82 LP |
877 | assert_return(m, -EINVAL); |
878 | assert_return(usec, -EINVAL); | |
879 | assert_return(m->monotonic > 0, -ESRCH); | |
acb5a3cb | 880 | |
69aec65c | 881 | *usec = m->monotonic; |
acb5a3cb LP |
882 | return 0; |
883 | } | |
884 | ||
d9f644e2 | 885 | _public_ int sd_bus_message_get_realtime_timestamp(sd_bus_message *m, uint64_t *usec) { |
9d6c7c82 LP |
886 | assert_return(m, -EINVAL); |
887 | assert_return(usec, -EINVAL); | |
888 | assert_return(m->realtime > 0, -ESRCH); | |
69aec65c LP |
889 | |
890 | *usec = m->realtime; | |
891 | return 0; | |
892 | } | |
893 | ||
d9f644e2 | 894 | _public_ int sd_bus_message_get_comm(sd_bus_message *m, const char **ret) { |
9d6c7c82 LP |
895 | assert_return(m, -EINVAL); |
896 | assert_return(ret, -EINVAL); | |
897 | assert_return(m->comm, -ESRCH); | |
69aec65c | 898 | |
4a875b61 LP |
899 | *ret = m->comm; |
900 | return 0; | |
69aec65c LP |
901 | } |
902 | ||
d9f644e2 | 903 | _public_ int sd_bus_message_get_tid_comm(sd_bus_message *m, const char **ret) { |
9d6c7c82 LP |
904 | assert_return(m, -EINVAL); |
905 | assert_return(ret, -EINVAL); | |
906 | assert_return(m->tid_comm, -ESRCH); | |
69aec65c | 907 | |
4a875b61 LP |
908 | *ret = m->tid_comm; |
909 | return 0; | |
69aec65c LP |
910 | } |
911 | ||
d9f644e2 | 912 | _public_ int sd_bus_message_get_exe(sd_bus_message *m, const char **ret) { |
9d6c7c82 LP |
913 | assert_return(m, -EINVAL); |
914 | assert_return(ret, -EINVAL); | |
915 | assert_return(m->exe, -ESRCH); | |
69aec65c | 916 | |
4a875b61 LP |
917 | *ret = m->exe; |
918 | return 0; | |
919 | } | |
920 | ||
d9f644e2 | 921 | _public_ int sd_bus_message_get_cgroup(sd_bus_message *m, const char **ret) { |
9d6c7c82 LP |
922 | assert_return(m, -EINVAL); |
923 | assert_return(ret, -EINVAL); | |
924 | assert_return(m->cgroup, -ESRCH); | |
4a875b61 LP |
925 | |
926 | *ret = m->cgroup; | |
927 | return 0; | |
69aec65c LP |
928 | } |
929 | ||
d9f644e2 | 930 | _public_ int sd_bus_message_get_unit(sd_bus_message *m, const char **ret) { |
d8d3d8a7 LP |
931 | int r; |
932 | ||
9d6c7c82 LP |
933 | assert_return(m, -EINVAL); |
934 | assert_return(ret, -EINVAL); | |
935 | assert_return(m->cgroup, -ESRCH); | |
d8d3d8a7 LP |
936 | |
937 | if (!m->unit) { | |
938 | r = cg_path_get_unit(m->cgroup, &m->unit); | |
939 | if (r < 0) | |
940 | return r; | |
941 | } | |
942 | ||
943 | *ret = m->unit; | |
944 | return 0; | |
945 | } | |
946 | ||
d9f644e2 | 947 | _public_ int sd_bus_message_get_user_unit(sd_bus_message *m, const char **ret) { |
d8d3d8a7 LP |
948 | int r; |
949 | ||
9d6c7c82 LP |
950 | assert_return(m, -EINVAL); |
951 | assert_return(ret, -EINVAL); | |
952 | assert_return(m->cgroup, -ESRCH); | |
d8d3d8a7 LP |
953 | |
954 | if (!m->user_unit) { | |
955 | r = cg_path_get_user_unit(m->cgroup, &m->user_unit); | |
956 | if (r < 0) | |
957 | return r; | |
958 | } | |
959 | ||
960 | *ret = m->user_unit; | |
961 | return 0; | |
962 | } | |
963 | ||
d9f644e2 | 964 | _public_ int sd_bus_message_get_session(sd_bus_message *m, const char **ret) { |
d8d3d8a7 LP |
965 | int r; |
966 | ||
9d6c7c82 LP |
967 | assert_return(m, -EINVAL); |
968 | assert_return(ret, -EINVAL); | |
969 | assert_return(m->cgroup, -ESRCH); | |
d8d3d8a7 LP |
970 | |
971 | if (!m->session) { | |
972 | r = cg_path_get_session(m->cgroup, &m->session); | |
973 | if (r < 0) | |
974 | return r; | |
975 | } | |
976 | ||
977 | *ret = m->session; | |
978 | return 0; | |
979 | } | |
980 | ||
d9f644e2 | 981 | _public_ int sd_bus_message_get_owner_uid(sd_bus_message *m, uid_t *uid) { |
9d6c7c82 LP |
982 | assert_return(m, -EINVAL); |
983 | assert_return(uid, -EINVAL); | |
984 | assert_return(m->cgroup, -ESRCH); | |
bc7f3beb LP |
985 | |
986 | return cg_path_get_owner_uid(m->cgroup, uid); | |
987 | } | |
988 | ||
d9f644e2 | 989 | _public_ int sd_bus_message_get_cmdline(sd_bus_message *m, char ***cmdline) { |
77930f11 LP |
990 | size_t n, i; |
991 | const char *p; | |
992 | bool first; | |
993 | ||
9d6c7c82 LP |
994 | assert_return(m, -EINVAL); |
995 | assert_return(m->cmdline, -ESRCH); | |
77930f11 LP |
996 | |
997 | for (p = m->cmdline, n = 0; p < m->cmdline + m->cmdline_length; p++) | |
998 | if (*p == 0) | |
999 | n++; | |
1000 | ||
1001 | m->cmdline_array = new(char*, n + 1); | |
1002 | if (!m->cmdline_array) | |
1003 | return -ENOMEM; | |
1004 | ||
1005 | for (p = m->cmdline, i = 0, first = true; p < m->cmdline + m->cmdline_length; p++) { | |
1006 | if (first) | |
1007 | m->cmdline_array[i++] = (char*) p; | |
1008 | ||
1009 | first = *p == 0; | |
1010 | } | |
1011 | ||
1012 | m->cmdline_array[i] = NULL; | |
1013 | *cmdline = m->cmdline_array; | |
1014 | ||
1015 | return 0; | |
1016 | } | |
1017 | ||
d9f644e2 | 1018 | _public_ int sd_bus_message_get_audit_sessionid(sd_bus_message *m, uint32_t *sessionid) { |
9d6c7c82 LP |
1019 | assert_return(m, -EINVAL); |
1020 | assert_return(sessionid, -EINVAL); | |
1021 | assert_return(m->audit, -ESRCH); | |
120f919e LP |
1022 | |
1023 | *sessionid = m->audit->sessionid; | |
1024 | return 0; | |
1025 | } | |
1026 | ||
d9f644e2 | 1027 | _public_ int sd_bus_message_get_audit_loginuid(sd_bus_message *m, uid_t *uid) { |
9d6c7c82 LP |
1028 | assert_return(m, -EINVAL); |
1029 | assert_return(uid, -EINVAL); | |
1030 | assert_return(m->audit, -ESRCH); | |
120f919e LP |
1031 | |
1032 | *uid = m->audit->loginuid; | |
1033 | return 0; | |
1034 | } | |
1035 | ||
d9f644e2 | 1036 | _public_ int sd_bus_message_has_effective_cap(sd_bus_message *m, int capability) { |
102ea8e4 LP |
1037 | unsigned sz; |
1038 | ||
9d6c7c82 LP |
1039 | assert_return(m, -EINVAL); |
1040 | assert_return(capability < 0, -EINVAL); | |
1041 | assert_return(!m->capability, -ESRCH); | |
102ea8e4 LP |
1042 | |
1043 | sz = m->capability_size / 4; | |
1044 | if ((unsigned) capability >= sz*8) | |
1045 | return 0; | |
1046 | ||
1047 | return !!(m->capability[2 * sz + (capability / 8)] & (1 << (capability % 8))); | |
1048 | } | |
1049 | ||
d9f644e2 ZJS |
1050 | _public_ int sd_bus_message_is_signal(sd_bus_message *m, |
1051 | const char *interface, | |
1052 | const char *member) { | |
9d6c7c82 | 1053 | assert_return(m, -EINVAL); |
de1c301e | 1054 | |
40ca29a1 | 1055 | if (m->header->type != SD_BUS_MESSAGE_SIGNAL) |
de1c301e LP |
1056 | return 0; |
1057 | ||
1058 | if (interface && (!m->interface || !streq(m->interface, interface))) | |
1059 | return 0; | |
1060 | ||
1061 | if (member && (!m->member || !streq(m->member, member))) | |
1062 | return 0; | |
1063 | ||
1064 | return 1; | |
1065 | } | |
1066 | ||
d9f644e2 ZJS |
1067 | _public_ int sd_bus_message_is_method_call(sd_bus_message *m, |
1068 | const char *interface, | |
1069 | const char *member) { | |
9d6c7c82 | 1070 | assert_return(m, -EINVAL); |
de1c301e | 1071 | |
40ca29a1 | 1072 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
de1c301e LP |
1073 | return 0; |
1074 | ||
1075 | if (interface && (!m->interface || !streq(m->interface, interface))) | |
1076 | return 0; | |
1077 | ||
1078 | if (member && (!m->member || !streq(m->member, member))) | |
1079 | return 0; | |
1080 | ||
1081 | return 1; | |
1082 | } | |
1083 | ||
d9f644e2 | 1084 | _public_ int sd_bus_message_is_method_error(sd_bus_message *m, const char *name) { |
9d6c7c82 | 1085 | assert_return(m, -EINVAL); |
de1c301e | 1086 | |
40ca29a1 | 1087 | if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) |
de1c301e LP |
1088 | return 0; |
1089 | ||
1090 | if (name && (!m->error.name || !streq(m->error.name, name))) | |
1091 | return 0; | |
1092 | ||
1093 | return 1; | |
1094 | } | |
1095 | ||
d9f644e2 | 1096 | _public_ int sd_bus_message_set_no_reply(sd_bus_message *m, int b) { |
9d6c7c82 LP |
1097 | assert_return(m, -EINVAL); |
1098 | assert_return(!m->sealed, -EPERM); | |
1099 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EPERM); | |
de1c301e LP |
1100 | |
1101 | if (b) | |
1102 | m->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; | |
1103 | else | |
1104 | m->header->flags &= ~SD_BUS_MESSAGE_NO_REPLY_EXPECTED; | |
1105 | ||
1106 | return 0; | |
1107 | } | |
1108 | ||
1fee9de5 LP |
1109 | _public_ int sd_bus_message_set_no_auto_start(sd_bus_message *m, int b) { |
1110 | assert_return(m, -EINVAL); | |
1111 | assert_return(!m->sealed, -EPERM); | |
1112 | ||
1113 | if (b) | |
1114 | m->header->flags |= SD_BUS_MESSAGE_NO_AUTO_START; | |
1115 | else | |
1116 | m->header->flags &= ~SD_BUS_MESSAGE_NO_AUTO_START; | |
1117 | ||
1118 | return 0; | |
1119 | } | |
1120 | ||
de1c301e LP |
1121 | static struct bus_container *message_get_container(sd_bus_message *m) { |
1122 | assert(m); | |
1123 | ||
1124 | if (m->n_containers == 0) | |
1125 | return &m->root_container; | |
1126 | ||
9a17484d LP |
1127 | assert(m->containers); |
1128 | return m->containers + m->n_containers - 1; | |
de1c301e LP |
1129 | } |
1130 | ||
bc7fd8cd LP |
1131 | struct bus_body_part *message_append_part(sd_bus_message *m) { |
1132 | struct bus_body_part *part; | |
1133 | ||
1134 | assert(m); | |
1135 | ||
1136 | if (m->poisoned) | |
1137 | return NULL; | |
1138 | ||
1139 | if (m->n_body_parts <= 0) { | |
1140 | part = &m->body; | |
1141 | zero(*part); | |
1142 | } else { | |
1143 | assert(m->body_end); | |
1144 | ||
1145 | part = new0(struct bus_body_part, 1); | |
1146 | if (!part) { | |
1147 | m->poisoned = true; | |
1148 | return NULL; | |
1149 | } | |
1150 | ||
1151 | m->body_end->next = part; | |
1152 | } | |
1153 | ||
1154 | part->memfd = -1; | |
1155 | m->body_end = part; | |
1156 | m->n_body_parts ++; | |
1157 | ||
1158 | return part; | |
1159 | } | |
1160 | ||
1161 | static void part_zero(struct bus_body_part *part, size_t sz) { | |
1162 | assert(part); | |
1163 | assert(sz > 0); | |
1164 | assert(sz < 8); | |
1165 | ||
453a0c29 LP |
1166 | /* All other fields can be left in their defaults */ |
1167 | assert(!part->data); | |
1168 | assert(part->memfd < 0); | |
1169 | ||
bc7fd8cd | 1170 | part->size = sz; |
453a0c29 LP |
1171 | part->is_zero = true; |
1172 | part->sealed = true; | |
bc7fd8cd LP |
1173 | } |
1174 | ||
1175 | static int part_make_space( | |
1176 | struct sd_bus_message *m, | |
1177 | struct bus_body_part *part, | |
1178 | size_t sz, | |
1179 | void **q) { | |
1180 | ||
1181 | void *n; | |
1182 | int r; | |
1183 | ||
1184 | assert(m); | |
1185 | assert(part); | |
1186 | assert(!part->sealed); | |
1187 | ||
1188 | if (m->poisoned) | |
1189 | return -ENOMEM; | |
1190 | ||
1191 | if (!part->data && part->memfd < 0) | |
1192 | part->memfd = bus_kernel_pop_memfd(m->bus, &part->data, &part->mapped); | |
1193 | ||
1194 | if (part->memfd >= 0) { | |
1195 | uint64_t u = sz; | |
1196 | ||
1197 | r = ioctl(part->memfd, KDBUS_CMD_MEMFD_SIZE_SET, &u); | |
1198 | if (r < 0) { | |
1199 | m->poisoned = true; | |
1200 | return -errno; | |
1201 | } | |
1202 | ||
453a0c29 LP |
1203 | if (!part->data || sz > part->mapped) { |
1204 | size_t psz = PAGE_ALIGN(sz > 0 ? sz : 1); | |
bc7fd8cd LP |
1205 | |
1206 | if (part->mapped <= 0) | |
1207 | n = mmap(NULL, psz, PROT_READ|PROT_WRITE, MAP_SHARED, part->memfd, 0); | |
1208 | else | |
1209 | n = mremap(part->data, part->mapped, psz, MREMAP_MAYMOVE); | |
1210 | ||
1211 | if (n == MAP_FAILED) { | |
1212 | m->poisoned = true; | |
1213 | return -errno; | |
1214 | } | |
1215 | ||
1216 | part->mapped = psz; | |
1217 | part->data = n; | |
1218 | } | |
bf30e48f KS |
1219 | |
1220 | part->munmap_this = true; | |
bc7fd8cd | 1221 | } else { |
23c6f770 | 1222 | n = realloc(part->data, MAX(sz, 1u)); |
bc7fd8cd LP |
1223 | if (!n) { |
1224 | m->poisoned = true; | |
1225 | return -ENOMEM; | |
1226 | } | |
1227 | ||
1228 | part->data = n; | |
1229 | part->free_this = true; | |
1230 | } | |
1231 | ||
1232 | if (q) | |
1233 | *q = part->data ? (uint8_t*) part->data + part->size : NULL; | |
1234 | ||
1235 | part->size = sz; | |
1236 | return 0; | |
1237 | } | |
1238 | ||
453a0c29 | 1239 | static void message_extend_containers(sd_bus_message *m, size_t expand) { |
de1c301e | 1240 | struct bus_container *c; |
453a0c29 LP |
1241 | |
1242 | assert(m); | |
1243 | ||
1244 | if (expand <= 0) | |
1245 | return; | |
1246 | ||
1247 | /* Update counters */ | |
1248 | for (c = m->containers; c < m->containers + m->n_containers; c++) | |
1249 | if (c->array_size) | |
1250 | *c->array_size += expand; | |
453a0c29 LP |
1251 | } |
1252 | ||
1253 | static void *message_extend_body(sd_bus_message *m, size_t align, size_t sz) { | |
bc7fd8cd LP |
1254 | struct bus_body_part *part = NULL; |
1255 | size_t start_body, end_body, padding, start_part, end_part, added; | |
1256 | bool add_new_part; | |
1257 | void *p; | |
1258 | int r; | |
de1c301e LP |
1259 | |
1260 | assert(m); | |
9a17484d | 1261 | assert(align > 0); |
bc7fd8cd | 1262 | assert(!m->sealed); |
de1c301e | 1263 | |
bc7fd8cd LP |
1264 | if (m->poisoned) |
1265 | return NULL; | |
de1c301e | 1266 | |
bc7fd8cd LP |
1267 | start_body = ALIGN_TO((size_t) m->header->body_size, align); |
1268 | end_body = start_body + sz; | |
1269 | ||
1270 | padding = start_body - m->header->body_size; | |
1271 | added = padding + sz; | |
1272 | ||
1273 | /* Check for 32bit overflows */ | |
1274 | if (end_body > (size_t) ((uint32_t) -1)) { | |
1275 | m->poisoned = true; | |
de1c301e | 1276 | return NULL; |
bc7fd8cd | 1277 | } |
de1c301e | 1278 | |
bc7fd8cd LP |
1279 | add_new_part = |
1280 | m->n_body_parts <= 0 || | |
1281 | m->body_end->sealed || | |
1282 | padding != ALIGN_TO(m->body_end->size, align) - m->body_end->size; | |
de1c301e | 1283 | |
bc7fd8cd LP |
1284 | if (add_new_part) { |
1285 | if (padding > 0) { | |
1286 | part = message_append_part(m); | |
1287 | if (!part) | |
1288 | return NULL; | |
1289 | ||
1290 | part_zero(part, padding); | |
1291 | } | |
1292 | ||
1293 | part = message_append_part(m); | |
1294 | if (!part) | |
1295 | return NULL; | |
1296 | ||
1297 | r = part_make_space(m, part, sz, &p); | |
1298 | if (r < 0) | |
1299 | return NULL; | |
1300 | } else { | |
453a0c29 | 1301 | struct bus_container *c; |
bc7fd8cd LP |
1302 | void *op; |
1303 | size_t os; | |
1304 | ||
1305 | part = m->body_end; | |
1306 | op = part->data; | |
1307 | os = part->size; | |
1308 | ||
1309 | start_part = ALIGN_TO(part->size, align); | |
1310 | end_part = start_part + sz; | |
1311 | ||
1312 | r = part_make_space(m, part, end_part, &p); | |
1313 | if (r < 0) | |
1314 | return NULL; | |
1315 | ||
1316 | if (padding > 0) { | |
1317 | memset(p, 0, padding); | |
1318 | p = (uint8_t*) p + padding; | |
de1c301e LP |
1319 | } |
1320 | ||
bc7fd8cd LP |
1321 | /* Readjust pointers */ |
1322 | for (c = m->containers; c < m->containers + m->n_containers; c++) | |
1323 | c->array_size = adjust_pointer(c->array_size, op, os, part->data); | |
1324 | ||
1325 | m->error.message = (const char*) adjust_pointer(m->error.message, op, os, part->data); | |
de1c301e LP |
1326 | } |
1327 | ||
bc7fd8cd | 1328 | m->header->body_size = end_body; |
453a0c29 | 1329 | message_extend_containers(m, added); |
de1c301e LP |
1330 | |
1331 | return p; | |
1332 | } | |
1333 | ||
1334 | int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored) { | |
1335 | struct bus_container *c; | |
27f6e5c7 | 1336 | ssize_t align, sz; |
de1c301e LP |
1337 | uint32_t k; |
1338 | void *a; | |
2c93b4ef | 1339 | int fd = -1; |
62cfa9da | 1340 | uint32_t fdi = 0; |
2c93b4ef | 1341 | int r; |
de1c301e | 1342 | |
9d6c7c82 | 1343 | assert_return(m, -EINVAL); |
9d6c7c82 LP |
1344 | assert_return(!m->sealed, -EPERM); |
1345 | assert_return(bus_type_is_basic(type), -EINVAL); | |
1346 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
1347 | |
1348 | c = message_get_container(m); | |
1349 | ||
1350 | if (c->signature && c->signature[c->index]) { | |
1351 | /* Container signature is already set */ | |
1352 | ||
1353 | if (c->signature[c->index] != type) | |
9a17484d | 1354 | return -ENXIO; |
de1c301e | 1355 | } else { |
5cbe7492 LP |
1356 | char *e; |
1357 | ||
de1c301e LP |
1358 | /* Maybe we can append to the signature? But only if this is the top-level container*/ |
1359 | if (c->enclosing != 0) | |
9a17484d | 1360 | return -ENXIO; |
de1c301e LP |
1361 | |
1362 | e = strextend(&c->signature, CHAR_TO_STR(type), NULL); | |
bc7fd8cd LP |
1363 | if (!e) { |
1364 | m->poisoned = true; | |
de1c301e | 1365 | return -ENOMEM; |
bc7fd8cd | 1366 | } |
de1c301e LP |
1367 | } |
1368 | ||
de1c301e LP |
1369 | switch (type) { |
1370 | ||
1371 | case SD_BUS_TYPE_STRING: | |
cd6f997f LP |
1372 | /* To make things easy we'll serialize a NULL string |
1373 | * into the empty string */ | |
1374 | p = strempty(p); | |
1375 | ||
1376 | /* Fall through... */ | |
de1c301e | 1377 | case SD_BUS_TYPE_OBJECT_PATH: |
b8beb278 | 1378 | |
cd6f997f LP |
1379 | if (!p) { |
1380 | r = -EINVAL; | |
1381 | goto fail; | |
1382 | } | |
1383 | ||
de1c301e LP |
1384 | align = 4; |
1385 | sz = 4 + strlen(p) + 1; | |
1386 | break; | |
1387 | ||
1388 | case SD_BUS_TYPE_SIGNATURE: | |
b8beb278 | 1389 | |
cd6f997f LP |
1390 | if (!p) { |
1391 | r = -EINVAL; | |
1392 | goto fail; | |
1393 | } | |
1394 | ||
de1c301e LP |
1395 | align = 1; |
1396 | sz = 1 + strlen(p) + 1; | |
1397 | break; | |
1398 | ||
1399 | case SD_BUS_TYPE_BOOLEAN: | |
b3273daf | 1400 | |
15912917 KS |
1401 | if (!p) { |
1402 | r = -EINVAL; | |
1403 | goto fail; | |
1404 | } | |
1405 | ||
de1c301e LP |
1406 | align = sz = 4; |
1407 | ||
1408 | assert_cc(sizeof(int) == sizeof(uint32_t)); | |
1409 | memcpy(&k, p, 4); | |
1410 | k = !!k; | |
1411 | p = &k; | |
1412 | break; | |
1413 | ||
2c93b4ef LP |
1414 | case SD_BUS_TYPE_UNIX_FD: { |
1415 | int z, *f; | |
1416 | ||
15912917 KS |
1417 | if (!p) { |
1418 | r = -EINVAL; | |
1419 | goto fail; | |
1420 | } | |
1421 | ||
2c93b4ef LP |
1422 | if (!m->allow_fds) { |
1423 | r = -ENOTSUP; | |
1424 | goto fail; | |
1425 | } | |
1426 | ||
1427 | align = sz = 4; | |
1428 | ||
1429 | z = *(int*) p; | |
1430 | if (z < 0) { | |
1431 | r = -EINVAL; | |
1432 | goto fail; | |
1433 | } | |
1434 | ||
1435 | fd = fcntl(z, F_DUPFD_CLOEXEC, 3); | |
1436 | if (fd < 0) { | |
1437 | r = -errno; | |
1438 | goto fail; | |
1439 | } | |
1440 | ||
1441 | f = realloc(m->fds, sizeof(int) * (m->n_fds + 1)); | |
1442 | if (!f) { | |
bc7fd8cd | 1443 | m->poisoned = true; |
2c93b4ef LP |
1444 | r = -ENOMEM; |
1445 | goto fail; | |
1446 | } | |
1447 | ||
1448 | fdi = m->n_fds; | |
1449 | f[fdi] = fd; | |
1450 | m->fds = f; | |
1451 | m->free_fds = true; | |
1452 | break; | |
1453 | } | |
1454 | ||
de1c301e | 1455 | default: |
b3273daf LP |
1456 | if (!p) { |
1457 | r = -EINVAL; | |
1458 | goto fail; | |
1459 | } | |
1460 | ||
de1c301e LP |
1461 | align = bus_type_get_alignment(type); |
1462 | sz = bus_type_get_size(type); | |
1463 | break; | |
1464 | } | |
1465 | ||
1466 | assert(align > 0); | |
1467 | assert(sz > 0); | |
1468 | ||
1469 | a = message_extend_body(m, align, sz); | |
1470 | if (!a) { | |
2c93b4ef LP |
1471 | r = -ENOMEM; |
1472 | goto fail; | |
de1c301e LP |
1473 | } |
1474 | ||
1475 | if (type == SD_BUS_TYPE_STRING || type == SD_BUS_TYPE_OBJECT_PATH) { | |
1476 | *(uint32_t*) a = sz - 5; | |
1477 | memcpy((uint8_t*) a + 4, p, sz - 4); | |
1478 | ||
1479 | if (stored) | |
1480 | *stored = (const uint8_t*) a + 4; | |
1481 | ||
1482 | } else if (type == SD_BUS_TYPE_SIGNATURE) { | |
1483 | *(uint8_t*) a = sz - 1; | |
1484 | memcpy((uint8_t*) a + 1, p, sz - 1); | |
1485 | ||
1486 | if (stored) | |
1487 | *stored = (const uint8_t*) a + 1; | |
2c93b4ef LP |
1488 | } else if (type == SD_BUS_TYPE_UNIX_FD) { |
1489 | *(uint32_t*) a = fdi; | |
1490 | ||
1491 | if (stored) | |
1492 | *stored = a; | |
1493 | ||
1494 | m->n_fds ++; | |
de1c301e LP |
1495 | |
1496 | } else { | |
1497 | memcpy(a, p, sz); | |
1498 | ||
1499 | if (stored) | |
1500 | *stored = a; | |
1501 | } | |
1502 | ||
1503 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1504 | c->index++; |
de1c301e LP |
1505 | |
1506 | return 0; | |
2c93b4ef LP |
1507 | |
1508 | fail: | |
2c93b4ef LP |
1509 | if (fd >= 0) |
1510 | close_nointr_nofail(fd); | |
1511 | ||
1512 | return r; | |
de1c301e LP |
1513 | } |
1514 | ||
d9f644e2 | 1515 | _public_ int sd_bus_message_append_basic(sd_bus_message *m, char type, const void *p) { |
de1c301e LP |
1516 | return message_append_basic(m, type, p, NULL); |
1517 | } | |
1518 | ||
938bcbab LP |
1519 | _public_ int sd_bus_message_append_string_space( |
1520 | sd_bus_message *m, | |
1521 | size_t size, | |
1522 | char **s) { | |
1523 | ||
f8e013f8 | 1524 | struct bus_container *c; |
f8e013f8 | 1525 | void *a; |
f8e013f8 | 1526 | |
9d6c7c82 LP |
1527 | assert_return(m, -EINVAL); |
1528 | assert_return(s, -EINVAL); | |
1529 | assert_return(!m->sealed, -EPERM); | |
1530 | assert_return(!m->poisoned, -ESTALE); | |
f8e013f8 LP |
1531 | |
1532 | c = message_get_container(m); | |
1533 | ||
1534 | if (c->signature && c->signature[c->index]) { | |
1535 | /* Container signature is already set */ | |
1536 | ||
1537 | if (c->signature[c->index] != SD_BUS_TYPE_STRING) | |
1538 | return -ENXIO; | |
1539 | } else { | |
5cbe7492 LP |
1540 | char *e; |
1541 | ||
f8e013f8 LP |
1542 | /* Maybe we can append to the signature? But only if this is the top-level container*/ |
1543 | if (c->enclosing != 0) | |
1544 | return -ENXIO; | |
1545 | ||
1546 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL); | |
bc7fd8cd LP |
1547 | if (!e) { |
1548 | m->poisoned = true; | |
f8e013f8 | 1549 | return -ENOMEM; |
bc7fd8cd | 1550 | } |
f8e013f8 LP |
1551 | } |
1552 | ||
f8e013f8 | 1553 | a = message_extend_body(m, 4, 4 + size + 1); |
bc7fd8cd LP |
1554 | if (!a) |
1555 | return -ENOMEM; | |
f8e013f8 LP |
1556 | |
1557 | *(uint32_t*) a = size; | |
1558 | *s = (char*) a + 4; | |
1559 | ||
1560 | (*s)[size] = 0; | |
1561 | ||
1562 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1563 | c->index++; | |
1564 | ||
1565 | return 0; | |
f8e013f8 LP |
1566 | } |
1567 | ||
938bcbab LP |
1568 | _public_ int sd_bus_message_append_string_iovec( |
1569 | sd_bus_message *m, | |
1570 | const struct iovec *iov, | |
1571 | unsigned n) { | |
1572 | ||
1573 | size_t size; | |
1574 | unsigned i; | |
1575 | char *p; | |
1576 | int r; | |
1577 | ||
1578 | assert_return(m, -EINVAL); | |
1579 | assert_return(!m->sealed, -EPERM); | |
1580 | assert_return(iov || n == 0, -EINVAL); | |
1581 | assert_return(!m->poisoned, -ESTALE); | |
1582 | ||
1583 | size = IOVEC_TOTAL_SIZE(iov, n); | |
1584 | ||
1585 | r = sd_bus_message_append_string_space(m, size, &p); | |
1586 | if (r < 0) | |
1587 | return r; | |
1588 | ||
1589 | for (i = 0; i < n; i++) { | |
1590 | ||
1591 | if (iov[i].iov_base) | |
1592 | memcpy(p, iov[i].iov_base, iov[i].iov_len); | |
1593 | else | |
1594 | memset(p, ' ', iov[i].iov_len); | |
1595 | ||
1596 | p += iov[i].iov_len; | |
1597 | } | |
1598 | ||
1599 | return 0; | |
1600 | } | |
1601 | ||
de1c301e LP |
1602 | static int bus_message_open_array( |
1603 | sd_bus_message *m, | |
1604 | struct bus_container *c, | |
1605 | const char *contents, | |
1606 | uint32_t **array_size) { | |
1607 | ||
9a17484d | 1608 | unsigned nindex; |
bc7fd8cd | 1609 | void *a, *op; |
de1c301e | 1610 | int alignment; |
bc7fd8cd LP |
1611 | size_t os; |
1612 | struct bus_body_part *o; | |
de1c301e LP |
1613 | |
1614 | assert(m); | |
1615 | assert(c); | |
1616 | assert(contents); | |
1617 | assert(array_size); | |
1618 | ||
29ddb38f | 1619 | if (!signature_is_single(contents, true)) |
de1c301e LP |
1620 | return -EINVAL; |
1621 | ||
1622 | alignment = bus_type_get_alignment(contents[0]); | |
1623 | if (alignment < 0) | |
1624 | return alignment; | |
1625 | ||
1626 | if (c->signature && c->signature[c->index]) { | |
1627 | ||
1628 | /* Verify the existing signature */ | |
1629 | ||
1630 | if (c->signature[c->index] != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1631 | return -ENXIO; |
de1c301e LP |
1632 | |
1633 | if (!startswith(c->signature + c->index + 1, contents)) | |
9a17484d | 1634 | return -ENXIO; |
de1c301e LP |
1635 | |
1636 | nindex = c->index + 1 + strlen(contents); | |
1637 | } else { | |
5cbe7492 LP |
1638 | char *e; |
1639 | ||
de1c301e | 1640 | if (c->enclosing != 0) |
9a17484d | 1641 | return -ENXIO; |
de1c301e LP |
1642 | |
1643 | /* Extend the existing signature */ | |
1644 | ||
1645 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_ARRAY), contents, NULL); | |
bc7fd8cd LP |
1646 | if (!e) { |
1647 | m->poisoned = true; | |
de1c301e | 1648 | return -ENOMEM; |
bc7fd8cd | 1649 | } |
de1c301e LP |
1650 | |
1651 | nindex = e - c->signature; | |
1652 | } | |
1653 | ||
de1c301e | 1654 | a = message_extend_body(m, 4, 4); |
bc7fd8cd | 1655 | if (!a) |
de1c301e | 1656 | return -ENOMEM; |
de1c301e | 1657 | |
bc7fd8cd LP |
1658 | o = m->body_end; |
1659 | op = m->body_end->data; | |
1660 | os = m->body_end->size; | |
de1c301e | 1661 | |
bc7fd8cd LP |
1662 | /* Add alignment between size and first element */ |
1663 | if (!message_extend_body(m, alignment, 0)) | |
de1c301e | 1664 | return -ENOMEM; |
de1c301e LP |
1665 | |
1666 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1667 | c->index = nindex; | |
1668 | ||
bc7fd8cd LP |
1669 | /* location of array size might have changed so let's readjust a */ |
1670 | if (o == m->body_end) | |
1671 | a = adjust_pointer(a, op, os, m->body_end->data); | |
de1c301e | 1672 | |
bc7fd8cd | 1673 | *(uint32_t*) a = 0; |
de1c301e LP |
1674 | *array_size = a; |
1675 | return 0; | |
1676 | } | |
1677 | ||
1678 | static int bus_message_open_variant( | |
1679 | sd_bus_message *m, | |
1680 | struct bus_container *c, | |
1681 | const char *contents) { | |
1682 | ||
9a17484d | 1683 | size_t l; |
de1c301e LP |
1684 | void *a; |
1685 | ||
1686 | assert(m); | |
1687 | assert(c); | |
1688 | assert(contents); | |
1689 | ||
29ddb38f | 1690 | if (!signature_is_single(contents, false)) |
de1c301e LP |
1691 | return -EINVAL; |
1692 | ||
1693 | if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN) | |
1694 | return -EINVAL; | |
1695 | ||
1696 | if (c->signature && c->signature[c->index]) { | |
1697 | ||
1698 | if (c->signature[c->index] != SD_BUS_TYPE_VARIANT) | |
9a17484d | 1699 | return -ENXIO; |
de1c301e LP |
1700 | |
1701 | } else { | |
5cbe7492 LP |
1702 | char *e; |
1703 | ||
de1c301e | 1704 | if (c->enclosing != 0) |
9a17484d | 1705 | return -ENXIO; |
de1c301e LP |
1706 | |
1707 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_VARIANT), NULL); | |
bc7fd8cd LP |
1708 | if (!e) { |
1709 | m->poisoned = true; | |
de1c301e | 1710 | return -ENOMEM; |
bc7fd8cd | 1711 | } |
de1c301e LP |
1712 | } |
1713 | ||
de1c301e LP |
1714 | l = strlen(contents); |
1715 | a = message_extend_body(m, 1, 1 + l + 1); | |
bc7fd8cd | 1716 | if (!a) |
de1c301e | 1717 | return -ENOMEM; |
de1c301e LP |
1718 | |
1719 | *(uint8_t*) a = l; | |
1720 | memcpy((uint8_t*) a + 1, contents, l + 1); | |
1721 | ||
1722 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1723 | c->index++; |
de1c301e LP |
1724 | |
1725 | return 0; | |
1726 | } | |
1727 | ||
1728 | static int bus_message_open_struct( | |
1729 | sd_bus_message *m, | |
1730 | struct bus_container *c, | |
1731 | const char *contents) { | |
1732 | ||
1733 | size_t nindex; | |
de1c301e LP |
1734 | |
1735 | assert(m); | |
1736 | assert(c); | |
1737 | assert(contents); | |
1738 | ||
1739 | if (!signature_is_valid(contents, false)) | |
1740 | return -EINVAL; | |
1741 | ||
1742 | if (c->signature && c->signature[c->index]) { | |
1743 | size_t l; | |
1744 | ||
1745 | l = strlen(contents); | |
1746 | ||
1747 | if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN || | |
1748 | !startswith(c->signature + c->index + 1, contents) || | |
1749 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END) | |
9a17484d | 1750 | return -ENXIO; |
de1c301e LP |
1751 | |
1752 | nindex = c->index + 1 + l + 1; | |
1753 | } else { | |
5cbe7492 LP |
1754 | char *e; |
1755 | ||
de1c301e | 1756 | if (c->enclosing != 0) |
9a17484d | 1757 | return -ENXIO; |
de1c301e LP |
1758 | |
1759 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_BEGIN), contents, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_END), NULL); | |
bc7fd8cd LP |
1760 | if (!e) { |
1761 | m->poisoned = true; | |
de1c301e | 1762 | return -ENOMEM; |
bc7fd8cd | 1763 | } |
de1c301e LP |
1764 | |
1765 | nindex = e - c->signature; | |
1766 | } | |
1767 | ||
1768 | /* Align contents to 8 byte boundary */ | |
bc7fd8cd | 1769 | if (!message_extend_body(m, 8, 0)) |
de1c301e | 1770 | return -ENOMEM; |
de1c301e LP |
1771 | |
1772 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1773 | c->index = nindex; | |
1774 | ||
1775 | return 0; | |
1776 | } | |
1777 | ||
1778 | static int bus_message_open_dict_entry( | |
1779 | sd_bus_message *m, | |
1780 | struct bus_container *c, | |
1781 | const char *contents) { | |
1782 | ||
1783 | size_t nindex; | |
1784 | ||
1785 | assert(m); | |
1786 | assert(c); | |
1787 | assert(contents); | |
1788 | ||
1789 | if (!signature_is_pair(contents)) | |
1790 | return -EINVAL; | |
1791 | ||
1792 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1793 | return -ENXIO; |
de1c301e LP |
1794 | |
1795 | if (c->signature && c->signature[c->index]) { | |
1796 | size_t l; | |
1797 | ||
1798 | l = strlen(contents); | |
1799 | ||
1800 | if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN || | |
1801 | !startswith(c->signature + c->index + 1, contents) || | |
1802 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END) | |
9a17484d | 1803 | return -ENXIO; |
de1c301e LP |
1804 | |
1805 | nindex = c->index + 1 + l + 1; | |
1806 | } else | |
9a17484d | 1807 | return -ENXIO; |
de1c301e LP |
1808 | |
1809 | /* Align contents to 8 byte boundary */ | |
1810 | if (!message_extend_body(m, 8, 0)) | |
1811 | return -ENOMEM; | |
1812 | ||
1813 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1814 | c->index = nindex; | |
1815 | ||
1816 | return 0; | |
1817 | } | |
1818 | ||
d9f644e2 | 1819 | _public_ int sd_bus_message_open_container( |
de1c301e LP |
1820 | sd_bus_message *m, |
1821 | char type, | |
1822 | const char *contents) { | |
1823 | ||
9a17484d | 1824 | struct bus_container *c, *w; |
de1c301e | 1825 | uint32_t *array_size = NULL; |
9a17484d | 1826 | char *signature; |
b3af9646 | 1827 | size_t before; |
de1c301e LP |
1828 | int r; |
1829 | ||
9d6c7c82 LP |
1830 | assert_return(m, -EINVAL); |
1831 | assert_return(!m->sealed, -EPERM); | |
1832 | assert_return(contents, -EINVAL); | |
1833 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
1834 | |
1835 | /* Make sure we have space for one more container */ | |
9a17484d | 1836 | w = realloc(m->containers, sizeof(struct bus_container) * (m->n_containers + 1)); |
bc7fd8cd LP |
1837 | if (!w) { |
1838 | m->poisoned = true; | |
de1c301e | 1839 | return -ENOMEM; |
bc7fd8cd LP |
1840 | } |
1841 | ||
9a17484d | 1842 | m->containers = w; |
de1c301e LP |
1843 | |
1844 | c = message_get_container(m); | |
1845 | ||
1846 | signature = strdup(contents); | |
bc7fd8cd LP |
1847 | if (!signature) { |
1848 | m->poisoned = true; | |
de1c301e | 1849 | return -ENOMEM; |
bc7fd8cd | 1850 | } |
de1c301e | 1851 | |
b3af9646 LP |
1852 | /* Save old index in the parent container, in case we have to |
1853 | * abort this container */ | |
1854 | c->saved_index = c->index; | |
1855 | before = m->header->body_size; | |
1856 | ||
de1c301e LP |
1857 | if (type == SD_BUS_TYPE_ARRAY) |
1858 | r = bus_message_open_array(m, c, contents, &array_size); | |
1859 | else if (type == SD_BUS_TYPE_VARIANT) | |
1860 | r = bus_message_open_variant(m, c, contents); | |
1861 | else if (type == SD_BUS_TYPE_STRUCT) | |
1862 | r = bus_message_open_struct(m, c, contents); | |
1863 | else if (type == SD_BUS_TYPE_DICT_ENTRY) | |
1864 | r = bus_message_open_dict_entry(m, c, contents); | |
1865 | else | |
1866 | r = -EINVAL; | |
1867 | ||
1868 | if (r < 0) { | |
1869 | free(signature); | |
1870 | return r; | |
1871 | } | |
1872 | ||
1873 | /* OK, let's fill it in */ | |
9a17484d LP |
1874 | w += m->n_containers++; |
1875 | w->enclosing = type; | |
1876 | w->signature = signature; | |
1877 | w->index = 0; | |
1878 | w->array_size = array_size; | |
b3af9646 LP |
1879 | w->before = before; |
1880 | w->begin = m->rindex; | |
de1c301e LP |
1881 | |
1882 | return 0; | |
1883 | } | |
1884 | ||
d9f644e2 | 1885 | _public_ int sd_bus_message_close_container(sd_bus_message *m) { |
de1c301e LP |
1886 | struct bus_container *c; |
1887 | ||
9d6c7c82 LP |
1888 | assert_return(m, -EINVAL); |
1889 | assert_return(!m->sealed, -EPERM); | |
1890 | assert_return(m->n_containers > 0, -EINVAL); | |
1891 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
1892 | |
1893 | c = message_get_container(m); | |
de1c301e | 1894 | if (c->enclosing != SD_BUS_TYPE_ARRAY) |
9a17484d | 1895 | if (c->signature && c->signature[c->index] != 0) |
de1c301e LP |
1896 | return -EINVAL; |
1897 | ||
1898 | free(c->signature); | |
1899 | m->n_containers--; | |
1900 | ||
1901 | return 0; | |
1902 | } | |
1903 | ||
1b492614 LP |
1904 | typedef struct { |
1905 | const char *types; | |
1906 | unsigned n_struct; | |
1907 | unsigned n_array; | |
1908 | } TypeStack; | |
1909 | ||
1910 | static int type_stack_push(TypeStack *stack, unsigned max, unsigned *i, const char *types, unsigned n_struct, unsigned n_array) { | |
1911 | assert(stack); | |
1912 | assert(max > 0); | |
1913 | ||
1914 | if (*i >= max) | |
1915 | return -EINVAL; | |
1916 | ||
1917 | stack[*i].types = types; | |
1918 | stack[*i].n_struct = n_struct; | |
1919 | stack[*i].n_array = n_array; | |
1920 | (*i)++; | |
1921 | ||
1922 | return 0; | |
1923 | } | |
1924 | ||
1925 | static int type_stack_pop(TypeStack *stack, unsigned max, unsigned *i, const char **types, unsigned *n_struct, unsigned *n_array) { | |
1926 | assert(stack); | |
1927 | assert(max > 0); | |
1928 | assert(types); | |
1929 | assert(n_struct); | |
1930 | assert(n_array); | |
1931 | ||
1932 | if (*i <= 0) | |
1933 | return 0; | |
1934 | ||
1935 | (*i)--; | |
1936 | *types = stack[*i].types; | |
1937 | *n_struct = stack[*i].n_struct; | |
1938 | *n_array = stack[*i].n_array; | |
1939 | ||
1940 | return 1; | |
1941 | } | |
1942 | ||
917b5dc7 | 1943 | int bus_message_append_ap( |
de1c301e LP |
1944 | sd_bus_message *m, |
1945 | const char *types, | |
1946 | va_list ap) { | |
1947 | ||
1b492614 LP |
1948 | unsigned n_array, n_struct; |
1949 | TypeStack stack[BUS_CONTAINER_DEPTH]; | |
1950 | unsigned stack_ptr = 0; | |
de1c301e LP |
1951 | int r; |
1952 | ||
1953 | assert(m); | |
88d331d5 LP |
1954 | |
1955 | if (!types) | |
1956 | return 0; | |
de1c301e | 1957 | |
1b492614 LP |
1958 | n_array = (unsigned) -1; |
1959 | n_struct = strlen(types); | |
1960 | ||
1961 | for (;;) { | |
1962 | const char *t; | |
1963 | ||
1964 | if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) { | |
1965 | r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array); | |
1966 | if (r < 0) | |
1967 | return r; | |
1968 | if (r == 0) | |
1969 | break; | |
1970 | ||
1971 | r = sd_bus_message_close_container(m); | |
1972 | if (r < 0) | |
1973 | return r; | |
1974 | ||
1975 | continue; | |
1976 | } | |
1977 | ||
1978 | t = types; | |
1979 | if (n_array != (unsigned) -1) | |
1980 | n_array --; | |
1981 | else { | |
1982 | types ++; | |
1983 | n_struct--; | |
1984 | } | |
1985 | ||
de1c301e LP |
1986 | switch (*t) { |
1987 | ||
1988 | case SD_BUS_TYPE_BYTE: { | |
1989 | uint8_t x; | |
1990 | ||
1991 | x = (uint8_t) va_arg(ap, int); | |
1992 | r = sd_bus_message_append_basic(m, *t, &x); | |
1993 | break; | |
1994 | } | |
1995 | ||
1996 | case SD_BUS_TYPE_BOOLEAN: | |
1997 | case SD_BUS_TYPE_INT32: | |
9a17484d LP |
1998 | case SD_BUS_TYPE_UINT32: |
1999 | case SD_BUS_TYPE_UNIX_FD: { | |
de1c301e LP |
2000 | uint32_t x; |
2001 | ||
9a17484d LP |
2002 | /* We assume a boolean is the same as int32_t */ |
2003 | assert_cc(sizeof(int32_t) == sizeof(int)); | |
2004 | ||
de1c301e LP |
2005 | x = va_arg(ap, uint32_t); |
2006 | r = sd_bus_message_append_basic(m, *t, &x); | |
2007 | break; | |
2008 | } | |
2009 | ||
2010 | case SD_BUS_TYPE_INT16: | |
2011 | case SD_BUS_TYPE_UINT16: { | |
2012 | uint16_t x; | |
2013 | ||
2014 | x = (uint16_t) va_arg(ap, int); | |
2015 | r = sd_bus_message_append_basic(m, *t, &x); | |
2016 | break; | |
2017 | } | |
2018 | ||
2019 | case SD_BUS_TYPE_INT64: | |
2020 | case SD_BUS_TYPE_UINT64: | |
2021 | case SD_BUS_TYPE_DOUBLE: { | |
2022 | uint64_t x; | |
2023 | ||
2024 | x = va_arg(ap, uint64_t); | |
2025 | r = sd_bus_message_append_basic(m, *t, &x); | |
2026 | break; | |
2027 | } | |
2028 | ||
2029 | case SD_BUS_TYPE_STRING: | |
2030 | case SD_BUS_TYPE_OBJECT_PATH: | |
2031 | case SD_BUS_TYPE_SIGNATURE: { | |
2032 | const char *x; | |
2033 | ||
2034 | x = va_arg(ap, const char*); | |
2035 | r = sd_bus_message_append_basic(m, *t, x); | |
2036 | break; | |
2037 | } | |
2038 | ||
de1c301e | 2039 | case SD_BUS_TYPE_ARRAY: { |
de1c301e LP |
2040 | size_t k; |
2041 | ||
2042 | r = signature_element_length(t + 1, &k); | |
2043 | if (r < 0) | |
2044 | return r; | |
2045 | ||
2046 | { | |
2047 | char s[k + 1]; | |
de1c301e LP |
2048 | memcpy(s, t + 1, k); |
2049 | s[k] = 0; | |
de1c301e LP |
2050 | |
2051 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, s); | |
2052 | if (r < 0) | |
2053 | return r; | |
1b492614 | 2054 | } |
de1c301e | 2055 | |
1b492614 LP |
2056 | if (n_array == (unsigned) -1) { |
2057 | types += k; | |
2058 | n_struct -= k; | |
de1c301e LP |
2059 | } |
2060 | ||
1b492614 LP |
2061 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
2062 | if (r < 0) | |
2063 | return r; | |
2064 | ||
2065 | types = t + 1; | |
2066 | n_struct = k; | |
2067 | n_array = va_arg(ap, unsigned); | |
2068 | ||
de1c301e LP |
2069 | break; |
2070 | } | |
2071 | ||
2072 | case SD_BUS_TYPE_VARIANT: { | |
2073 | const char *s; | |
2074 | ||
2075 | s = va_arg(ap, const char*); | |
2076 | if (!s) | |
2077 | return -EINVAL; | |
2078 | ||
2079 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_VARIANT, s); | |
2080 | if (r < 0) | |
2081 | return r; | |
2082 | ||
1b492614 | 2083 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
de1c301e LP |
2084 | if (r < 0) |
2085 | return r; | |
2086 | ||
1b492614 LP |
2087 | types = s; |
2088 | n_struct = strlen(s); | |
2089 | n_array = (unsigned) -1; | |
2090 | ||
de1c301e LP |
2091 | break; |
2092 | } | |
2093 | ||
2094 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
2095 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
2096 | size_t k; | |
2097 | ||
2098 | r = signature_element_length(t, &k); | |
2099 | if (r < 0) | |
2100 | return r; | |
2101 | ||
2102 | { | |
2103 | char s[k - 1]; | |
2104 | ||
2105 | memcpy(s, t + 1, k - 2); | |
2106 | s[k - 2] = 0; | |
2107 | ||
2108 | r = sd_bus_message_open_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
2109 | if (r < 0) | |
2110 | return r; | |
1b492614 | 2111 | } |
de1c301e | 2112 | |
1b492614 LP |
2113 | if (n_array == (unsigned) -1) { |
2114 | types += k - 1; | |
2115 | n_struct -= k - 1; | |
2116 | } | |
de1c301e | 2117 | |
1b492614 LP |
2118 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
2119 | if (r < 0) | |
2120 | return r; | |
de1c301e | 2121 | |
1b492614 LP |
2122 | types = t + 1; |
2123 | n_struct = k - 2; | |
2124 | n_array = (unsigned) -1; | |
de1c301e LP |
2125 | |
2126 | break; | |
2127 | } | |
2128 | ||
2129 | default: | |
2130 | r = -EINVAL; | |
2131 | } | |
2132 | ||
2133 | if (r < 0) | |
2134 | return r; | |
2135 | } | |
2136 | ||
2137 | return 0; | |
2138 | } | |
2139 | ||
d9f644e2 | 2140 | _public_ int sd_bus_message_append(sd_bus_message *m, const char *types, ...) { |
de1c301e LP |
2141 | va_list ap; |
2142 | int r; | |
2143 | ||
9d6c7c82 LP |
2144 | assert_return(m, -EINVAL); |
2145 | assert_return(types, -EINVAL); | |
2146 | assert_return(!m->sealed, -EPERM); | |
2147 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
2148 | |
2149 | va_start(ap, types); | |
917b5dc7 | 2150 | r = bus_message_append_ap(m, types, ap); |
de1c301e LP |
2151 | va_end(ap); |
2152 | ||
2153 | return r; | |
2154 | } | |
2155 | ||
d9f644e2 ZJS |
2156 | _public_ int sd_bus_message_append_array_space(sd_bus_message *m, |
2157 | char type, | |
2158 | size_t size, | |
2159 | void **ptr) { | |
b3af9646 LP |
2160 | ssize_t align, sz; |
2161 | void *a; | |
2162 | int r; | |
2163 | ||
9d6c7c82 LP |
2164 | assert_return(m, -EINVAL); |
2165 | assert_return(!m->sealed, -EPERM); | |
2166 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
2167 | assert_return(ptr || size == 0, -EINVAL); | |
2168 | assert_return(!m->poisoned, -ESTALE); | |
b3af9646 LP |
2169 | |
2170 | align = bus_type_get_alignment(type); | |
2171 | sz = bus_type_get_size(type); | |
2172 | ||
2173 | assert_se(align > 0); | |
2174 | assert_se(sz > 0); | |
2175 | ||
2176 | if (size % sz != 0) | |
2177 | return -EINVAL; | |
2178 | ||
2179 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
2180 | if (r < 0) | |
2181 | return r; | |
2182 | ||
2183 | a = message_extend_body(m, align, size); | |
bc7fd8cd LP |
2184 | if (!a) |
2185 | return -ENOMEM; | |
b3af9646 LP |
2186 | |
2187 | r = sd_bus_message_close_container(m); | |
2188 | if (r < 0) | |
bc7fd8cd | 2189 | return r; |
b3af9646 LP |
2190 | |
2191 | *ptr = a; | |
2192 | return 0; | |
b3af9646 LP |
2193 | } |
2194 | ||
d9f644e2 ZJS |
2195 | _public_ int sd_bus_message_append_array(sd_bus_message *m, |
2196 | char type, | |
2197 | const void *ptr, | |
2198 | size_t size) { | |
b3af9646 LP |
2199 | int r; |
2200 | void *p; | |
2201 | ||
9d6c7c82 LP |
2202 | assert_return(m, -EINVAL); |
2203 | assert_return(!m->sealed, -EPERM); | |
2204 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
2205 | assert_return(ptr || size == 0, -EINVAL); | |
2206 | assert_return(!m->poisoned, -ESTALE); | |
b3af9646 | 2207 | |
f8e013f8 | 2208 | r = sd_bus_message_append_array_space(m, type, size, &p); |
b3af9646 LP |
2209 | if (r < 0) |
2210 | return r; | |
2211 | ||
2212 | if (size > 0) | |
2213 | memcpy(p, ptr, size); | |
2214 | ||
2215 | return 0; | |
2216 | } | |
2217 | ||
938bcbab LP |
2218 | _public_ int sd_bus_message_append_array_iovec( |
2219 | sd_bus_message *m, | |
2220 | char type, | |
2221 | const struct iovec *iov, | |
2222 | unsigned n) { | |
2223 | ||
2224 | size_t size; | |
2225 | unsigned i; | |
2226 | void *p; | |
2227 | int r; | |
2228 | ||
2229 | assert_return(m, -EINVAL); | |
2230 | assert_return(!m->sealed, -EPERM); | |
2231 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
2232 | assert_return(iov || n == 0, -EINVAL); | |
2233 | assert_return(!m->poisoned, -ESTALE); | |
2234 | ||
2235 | size = IOVEC_TOTAL_SIZE(iov, n); | |
2236 | ||
2237 | r = sd_bus_message_append_array_space(m, type, size, &p); | |
2238 | if (r < 0) | |
2239 | return r; | |
2240 | ||
2241 | for (i = 0; i < n; i++) { | |
2242 | ||
2243 | if (iov[i].iov_base) | |
2244 | memcpy(p, iov[i].iov_base, iov[i].iov_len); | |
2245 | else | |
2246 | memset(p, 0, iov[i].iov_len); | |
2247 | ||
2248 | p = (uint8_t*) p + iov[i].iov_len; | |
2249 | } | |
2250 | ||
2251 | return 0; | |
2252 | } | |
2253 | ||
d9f644e2 ZJS |
2254 | _public_ int sd_bus_message_append_array_memfd(sd_bus_message *m, |
2255 | char type, | |
2256 | sd_memfd *memfd) { | |
453a0c29 LP |
2257 | _cleanup_close_ int copy_fd = -1; |
2258 | struct bus_body_part *part; | |
2259 | ssize_t align, sz; | |
2260 | uint64_t size; | |
2261 | void *a; | |
2262 | int r; | |
2263 | ||
2264 | if (!m) | |
2265 | return -EINVAL; | |
2266 | if (!memfd) | |
2267 | return -EINVAL; | |
2268 | if (m->sealed) | |
2269 | return -EPERM; | |
2270 | if (!bus_type_is_trivial(type)) | |
2271 | return -EINVAL; | |
2272 | if (m->poisoned) | |
2273 | return -ESTALE; | |
2274 | ||
2275 | r = sd_memfd_set_sealed(memfd, true); | |
2276 | if (r < 0) | |
2277 | return r; | |
2278 | ||
2279 | copy_fd = sd_memfd_dup_fd(memfd); | |
2280 | if (copy_fd < 0) | |
2281 | return copy_fd; | |
2282 | ||
2283 | r = sd_memfd_get_size(memfd, &size); | |
2284 | if (r < 0) | |
2285 | return r; | |
2286 | ||
2287 | align = bus_type_get_alignment(type); | |
2288 | sz = bus_type_get_size(type); | |
2289 | ||
2290 | assert_se(align > 0); | |
2291 | assert_se(sz > 0); | |
2292 | ||
2293 | if (size % sz != 0) | |
2294 | return -EINVAL; | |
2295 | ||
5cbe7492 | 2296 | if (size > (uint64_t) (uint32_t) -1) |
453a0c29 LP |
2297 | return -EINVAL; |
2298 | ||
2299 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
2300 | if (r < 0) | |
2301 | return r; | |
2302 | ||
2303 | a = message_extend_body(m, align, 0); | |
2304 | if (!a) | |
2305 | return -ENOMEM; | |
2306 | ||
2307 | part = message_append_part(m); | |
2308 | if (!part) | |
2309 | return -ENOMEM; | |
2310 | ||
2311 | part->memfd = copy_fd; | |
2312 | part->sealed = true; | |
2313 | part->size = size; | |
2314 | copy_fd = -1; | |
2315 | ||
2316 | message_extend_containers(m, size); | |
2317 | m->header->body_size += size; | |
2318 | ||
2319 | return sd_bus_message_close_container(m); | |
2320 | } | |
2321 | ||
d9f644e2 | 2322 | _public_ int sd_bus_message_append_string_memfd(sd_bus_message *m, sd_memfd *memfd) { |
5cbe7492 LP |
2323 | _cleanup_close_ int copy_fd = -1; |
2324 | struct bus_body_part *part; | |
2325 | struct bus_container *c; | |
2326 | uint64_t size; | |
2327 | void *a; | |
2328 | int r; | |
2329 | ||
55736ed0 LP |
2330 | assert_return(m, -EINVAL); |
2331 | assert_return(memfd, -EINVAL); | |
2332 | assert_return(!m->sealed, -EPERM); | |
2333 | assert_return(!m->poisoned, -ESTALE); | |
5cbe7492 LP |
2334 | |
2335 | r = sd_memfd_set_sealed(memfd, true); | |
2336 | if (r < 0) | |
2337 | return r; | |
2338 | ||
2339 | copy_fd = sd_memfd_dup_fd(memfd); | |
2340 | if (copy_fd < 0) | |
2341 | return copy_fd; | |
2342 | ||
2343 | r = sd_memfd_get_size(memfd, &size); | |
2344 | if (r < 0) | |
2345 | return r; | |
2346 | ||
2347 | /* We require this to be NUL terminated */ | |
2348 | if (size == 0) | |
2349 | return -EINVAL; | |
2350 | ||
2351 | if (size > (uint64_t) (uint32_t) -1) | |
2352 | return -EINVAL; | |
2353 | ||
2354 | c = message_get_container(m); | |
2355 | if (c->signature && c->signature[c->index]) { | |
2356 | /* Container signature is already set */ | |
2357 | ||
2358 | if (c->signature[c->index] != SD_BUS_TYPE_STRING) | |
2359 | return -ENXIO; | |
2360 | } else { | |
2361 | char *e; | |
2362 | ||
2363 | /* Maybe we can append to the signature? But only if this is the top-level container*/ | |
2364 | if (c->enclosing != 0) | |
2365 | return -ENXIO; | |
2366 | ||
2367 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL); | |
2368 | if (!e) { | |
2369 | m->poisoned = true; | |
2370 | return -ENOMEM; | |
2371 | } | |
2372 | } | |
2373 | ||
2374 | a = message_extend_body(m, 4, 4); | |
2375 | if (!a) | |
2376 | return -ENOMEM; | |
2377 | ||
2378 | *(uint32_t*) a = size - 1; | |
2379 | ||
2380 | part = message_append_part(m); | |
2381 | if (!part) | |
2382 | return -ENOMEM; | |
2383 | ||
2384 | part->memfd = copy_fd; | |
2385 | part->sealed = true; | |
2386 | part->size = size; | |
2387 | copy_fd = -1; | |
2388 | ||
2389 | message_extend_containers(m, size); | |
2390 | m->header->body_size += size; | |
2391 | ||
2392 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2393 | c->index++; | |
2394 | ||
2395 | return 0; | |
2396 | } | |
2397 | ||
d9f644e2 | 2398 | _public_ int sd_bus_message_append_strv(sd_bus_message *m, char **l) { |
55736ed0 LP |
2399 | char **i; |
2400 | int r; | |
2401 | ||
2402 | assert_return(m, -EINVAL); | |
2403 | assert_return(!m->sealed, -EPERM); | |
2404 | assert_return(!m->poisoned, -ESTALE); | |
2405 | ||
2406 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2407 | if (r < 0) | |
2408 | return r; | |
2409 | ||
2410 | STRV_FOREACH(i, l) { | |
2411 | r = sd_bus_message_append_basic(m, 's', *i); | |
2412 | if (r < 0) | |
2413 | return r; | |
2414 | } | |
2415 | ||
2416 | return sd_bus_message_close_container(m); | |
2417 | } | |
2418 | ||
a392d361 | 2419 | int bus_body_part_map(struct bus_body_part *part) { |
453a0c29 LP |
2420 | void *p; |
2421 | size_t psz; | |
2422 | ||
2423 | assert_se(part); | |
2424 | ||
2425 | if (part->data) | |
2426 | return 0; | |
2427 | ||
2428 | if (part->size <= 0) | |
2429 | return 0; | |
2430 | ||
1307c3ff LP |
2431 | /* For smaller zero parts (as used for padding) we don't need to map anything... */ |
2432 | if (part->memfd < 0 && part->is_zero && part->size < 8) { | |
2433 | static const uint8_t zeroes[7] = { }; | |
2434 | part->data = (void*) zeroes; | |
2435 | return 0; | |
2436 | } | |
2437 | ||
453a0c29 LP |
2438 | psz = PAGE_ALIGN(part->size); |
2439 | ||
2440 | if (part->memfd >= 0) | |
2441 | p = mmap(NULL, psz, PROT_READ, MAP_SHARED, part->memfd, 0); | |
2442 | else if (part->is_zero) | |
2443 | p = mmap(NULL, psz, PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
2444 | else | |
2445 | return -EINVAL; | |
2446 | ||
2447 | if (p == MAP_FAILED) | |
2448 | return -errno; | |
2449 | ||
2450 | part->mapped = psz; | |
2451 | part->data = p; | |
a392d361 LP |
2452 | part->munmap_this = true; |
2453 | ||
453a0c29 LP |
2454 | return 0; |
2455 | } | |
2456 | ||
a392d361 LP |
2457 | void bus_body_part_unmap(struct bus_body_part *part) { |
2458 | ||
2459 | assert_se(part); | |
2460 | ||
2461 | if (part->memfd < 0) | |
2462 | return; | |
2463 | ||
a392d361 LP |
2464 | if (!part->data) |
2465 | return; | |
2466 | ||
bf30e48f KS |
2467 | if (!part->munmap_this) |
2468 | return; | |
a392d361 LP |
2469 | |
2470 | assert_se(munmap(part->data, part->mapped) == 0); | |
2471 | ||
2472 | part->data = NULL; | |
2473 | part->mapped = 0; | |
2474 | part->munmap_this = false; | |
2475 | ||
2476 | return; | |
2477 | } | |
2478 | ||
9a17484d | 2479 | static int buffer_peek(const void *p, uint32_t sz, size_t *rindex, size_t align, size_t nbytes, void **r) { |
bc7fd8cd | 2480 | size_t k, start, end; |
de1c301e | 2481 | |
9a17484d LP |
2482 | assert(rindex); |
2483 | assert(align > 0); | |
de1c301e | 2484 | |
9a17484d | 2485 | start = ALIGN_TO((size_t) *rindex, align); |
bc7fd8cd | 2486 | end = start + nbytes; |
9a17484d | 2487 | |
bc7fd8cd | 2488 | if (end > sz) |
9a17484d LP |
2489 | return -EBADMSG; |
2490 | ||
2491 | /* Verify that padding is 0 */ | |
2492 | for (k = *rindex; k < start; k++) | |
2493 | if (((const uint8_t*) p)[k] != 0) | |
2494 | return -EBADMSG; | |
2495 | ||
2496 | if (r) | |
2497 | *r = (uint8_t*) p + start; | |
2498 | ||
bc7fd8cd | 2499 | *rindex = end; |
9a17484d LP |
2500 | |
2501 | return 1; | |
de1c301e LP |
2502 | } |
2503 | ||
7b058942 LP |
2504 | static bool message_end_of_signature(sd_bus_message *m) { |
2505 | struct bus_container *c; | |
2506 | ||
2507 | assert(m); | |
2508 | ||
2509 | c = message_get_container(m); | |
2510 | return !c->signature || c->signature[c->index] == 0; | |
2511 | } | |
2512 | ||
9a17484d LP |
2513 | static bool message_end_of_array(sd_bus_message *m, size_t index) { |
2514 | struct bus_container *c; | |
de1c301e | 2515 | |
9a17484d | 2516 | assert(m); |
de1c301e | 2517 | |
9a17484d LP |
2518 | c = message_get_container(m); |
2519 | if (!c->array_size) | |
2520 | return false; | |
de1c301e | 2521 | |
9a17484d | 2522 | return index >= c->begin + BUS_MESSAGE_BSWAP32(m, *c->array_size); |
de1c301e LP |
2523 | } |
2524 | ||
1405bef3 | 2525 | _public_ int sd_bus_message_at_end(sd_bus_message *m, int complete) { |
7b058942 LP |
2526 | assert_return(m, -EINVAL); |
2527 | assert_return(m->sealed, -EPERM); | |
2528 | ||
2529 | if (complete && m->n_containers > 0) | |
2530 | return false; | |
2531 | ||
2532 | if (message_end_of_signature(m)) | |
2533 | return true; | |
2534 | ||
2535 | if (message_end_of_array(m, m->rindex)) | |
2536 | return true; | |
2537 | ||
2538 | return false; | |
2539 | } | |
2540 | ||
bc7fd8cd LP |
2541 | static struct bus_body_part* find_part(sd_bus_message *m, size_t index, size_t sz, void **p) { |
2542 | struct bus_body_part *part; | |
2543 | size_t begin; | |
453a0c29 LP |
2544 | int r; |
2545 | ||
bc7fd8cd LP |
2546 | assert(m); |
2547 | ||
2548 | if (m->cached_rindex_part && index >= m->cached_rindex_part_begin) { | |
2549 | part = m->cached_rindex_part; | |
2550 | begin = m->cached_rindex_part_begin; | |
2551 | } else { | |
2552 | part = &m->body; | |
2553 | begin = 0; | |
2554 | } | |
2555 | ||
2556 | while (part) { | |
2557 | if (index < begin) | |
2558 | return NULL; | |
2559 | ||
2560 | if (index + sz <= begin + part->size) { | |
453a0c29 | 2561 | |
a392d361 | 2562 | r = bus_body_part_map(part); |
453a0c29 LP |
2563 | if (r < 0) |
2564 | return NULL; | |
2565 | ||
bc7fd8cd | 2566 | if (p) |
453a0c29 | 2567 | *p = (uint8_t*) part->data + index - begin; |
bc7fd8cd LP |
2568 | |
2569 | m->cached_rindex_part = part; | |
2570 | m->cached_rindex_part_begin = begin; | |
2571 | ||
2572 | return part; | |
2573 | } | |
2574 | ||
453a0c29 | 2575 | begin += part->size; |
bc7fd8cd LP |
2576 | part = part->next; |
2577 | } | |
2578 | ||
2579 | return NULL; | |
2580 | } | |
2581 | ||
2582 | static int message_peek_body( | |
2583 | sd_bus_message *m, | |
2584 | size_t *rindex, | |
2585 | size_t align, | |
2586 | size_t nbytes, | |
2587 | void **ret) { | |
2588 | ||
2589 | size_t k, start, end, padding; | |
2590 | struct bus_body_part *part; | |
2591 | uint8_t *q; | |
2592 | ||
de1c301e | 2593 | assert(m); |
9a17484d LP |
2594 | assert(rindex); |
2595 | assert(align > 0); | |
de1c301e | 2596 | |
9a17484d LP |
2597 | if (message_end_of_array(m, *rindex)) |
2598 | return 0; | |
de1c301e | 2599 | |
bc7fd8cd LP |
2600 | start = ALIGN_TO((size_t) *rindex, align); |
2601 | padding = start - *rindex; | |
2602 | end = start + nbytes; | |
2603 | ||
2604 | if (end > BUS_MESSAGE_BODY_SIZE(m)) | |
2605 | return -EBADMSG; | |
2606 | ||
2607 | part = find_part(m, *rindex, padding, (void**) &q); | |
2608 | if (!part) | |
2609 | return -EBADMSG; | |
2610 | ||
2611 | if (q) { | |
2612 | /* Verify padding */ | |
2613 | for (k = 0; k < padding; k++) | |
2614 | if (q[k] != 0) | |
2615 | return -EBADMSG; | |
2616 | } | |
2617 | ||
2618 | part = find_part(m, start, nbytes, (void**) &q); | |
2619 | if (!part || !q) | |
2620 | return -EBADMSG; | |
2621 | ||
2622 | *rindex = end; | |
2623 | ||
2624 | if (ret) | |
2625 | *ret = q; | |
2626 | ||
2627 | return 1; | |
9a17484d | 2628 | } |
de1c301e | 2629 | |
ac89bf1d | 2630 | static bool validate_nul(const char *s, size_t l) { |
de1c301e | 2631 | |
9a17484d LP |
2632 | /* Check for NUL chars in the string */ |
2633 | if (memchr(s, 0, l)) | |
2634 | return false; | |
de1c301e | 2635 | |
9a17484d LP |
2636 | /* Check for NUL termination */ |
2637 | if (s[l] != 0) | |
2638 | return false; | |
de1c301e | 2639 | |
ac89bf1d LP |
2640 | return true; |
2641 | } | |
2642 | ||
2643 | static bool validate_string(const char *s, size_t l) { | |
2644 | ||
2645 | if (!validate_nul(s, l)) | |
2646 | return false; | |
2647 | ||
9a17484d LP |
2648 | /* Check if valid UTF8 */ |
2649 | if (!utf8_is_valid(s)) | |
2650 | return false; | |
2651 | ||
2652 | return true; | |
de1c301e LP |
2653 | } |
2654 | ||
9a17484d | 2655 | static bool validate_signature(const char *s, size_t l) { |
de1c301e | 2656 | |
ac89bf1d | 2657 | if (!validate_nul(s, l)) |
9a17484d | 2658 | return false; |
de1c301e | 2659 | |
9a17484d LP |
2660 | /* Check if valid signature */ |
2661 | if (!signature_is_valid(s, true)) | |
2662 | return false; | |
2663 | ||
2664 | return true; | |
2665 | } | |
2666 | ||
ac89bf1d LP |
2667 | static bool validate_object_path(const char *s, size_t l) { |
2668 | ||
2669 | if (!validate_nul(s, l)) | |
2670 | return false; | |
2671 | ||
2672 | if (!object_path_is_valid(s)) | |
2673 | return false; | |
2674 | ||
2675 | return true; | |
2676 | } | |
2677 | ||
d9f644e2 | 2678 | _public_ int sd_bus_message_read_basic(sd_bus_message *m, char type, void *p) { |
9a17484d | 2679 | struct bus_container *c; |
9a17484d | 2680 | void *q; |
0dcd14b9 | 2681 | int r; |
9a17484d | 2682 | |
9d6c7c82 LP |
2683 | assert_return(m, -EINVAL); |
2684 | assert_return(m->sealed, -EPERM); | |
2685 | assert_return(bus_type_is_basic(type), -EINVAL); | |
de1c301e | 2686 | |
7b058942 | 2687 | if (message_end_of_signature(m)) |
430fb8fa | 2688 | return -ENXIO; |
9a17484d | 2689 | |
1daf8121 LP |
2690 | if (message_end_of_array(m, m->rindex)) |
2691 | return 0; | |
2692 | ||
7b058942 | 2693 | c = message_get_container(m); |
9a17484d LP |
2694 | if (c->signature[c->index] != type) |
2695 | return -ENXIO; | |
2696 | ||
2697 | switch (type) { | |
2698 | ||
2699 | case SD_BUS_TYPE_STRING: | |
2700 | case SD_BUS_TYPE_OBJECT_PATH: { | |
2701 | uint32_t l; | |
2702 | size_t rindex; | |
2703 | ||
2704 | rindex = m->rindex; | |
2705 | r = message_peek_body(m, &rindex, 4, 4, &q); | |
2706 | if (r <= 0) | |
2707 | return r; | |
2708 | ||
2709 | l = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
2710 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
de1c301e LP |
2711 | if (r < 0) |
2712 | return r; | |
9a17484d LP |
2713 | if (r == 0) |
2714 | return -EBADMSG; | |
2715 | ||
ac89bf1d LP |
2716 | if (type == SD_BUS_TYPE_OBJECT_PATH) { |
2717 | if (!validate_object_path(q, l)) | |
2718 | return -EBADMSG; | |
2719 | } else { | |
2720 | if (!validate_string(q, l)) | |
2721 | return -EBADMSG; | |
2722 | } | |
9a17484d LP |
2723 | |
2724 | m->rindex = rindex; | |
0dcd14b9 LP |
2725 | if (p) |
2726 | *(const char**) p = q; | |
2727 | ||
9a17484d | 2728 | break; |
de1c301e LP |
2729 | } |
2730 | ||
9a17484d LP |
2731 | case SD_BUS_TYPE_SIGNATURE: { |
2732 | uint8_t l; | |
2733 | size_t rindex; | |
2734 | ||
2735 | rindex = m->rindex; | |
2736 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
2737 | if (r <= 0) | |
2738 | return r; | |
2739 | ||
2740 | l = *(uint8_t*) q; | |
2741 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
de1c301e LP |
2742 | if (r < 0) |
2743 | return r; | |
9a17484d LP |
2744 | if (r == 0) |
2745 | return -EBADMSG; | |
2746 | ||
2747 | if (!validate_signature(q, l)) | |
2748 | return -EBADMSG; | |
2749 | ||
2750 | m->rindex = rindex; | |
0dcd14b9 LP |
2751 | |
2752 | if (p) | |
2753 | *(const char**) p = q; | |
9a17484d | 2754 | break; |
de1c301e LP |
2755 | } |
2756 | ||
9a17484d | 2757 | default: { |
27f6e5c7 ZJS |
2758 | ssize_t sz, align; |
2759 | size_t rindex; | |
de1c301e | 2760 | |
9a17484d LP |
2761 | align = bus_type_get_alignment(type); |
2762 | sz = bus_type_get_size(type); | |
27f6e5c7 | 2763 | assert(align > 0 && sz > 0); |
de1c301e | 2764 | |
2c93b4ef LP |
2765 | rindex = m->rindex; |
2766 | r = message_peek_body(m, &rindex, align, sz, &q); | |
9a17484d LP |
2767 | if (r <= 0) |
2768 | return r; | |
2769 | ||
2770 | switch (type) { | |
2771 | ||
2772 | case SD_BUS_TYPE_BYTE: | |
0dcd14b9 LP |
2773 | if (p) |
2774 | *(uint8_t*) p = *(uint8_t*) q; | |
9a17484d LP |
2775 | break; |
2776 | ||
2777 | case SD_BUS_TYPE_BOOLEAN: | |
0dcd14b9 | 2778 | if (p) |
102d8f81 | 2779 | *(int*) p = !!*(uint32_t*) q; |
9a17484d LP |
2780 | break; |
2781 | ||
2782 | case SD_BUS_TYPE_INT16: | |
2783 | case SD_BUS_TYPE_UINT16: | |
0dcd14b9 LP |
2784 | if (p) |
2785 | *(uint16_t*) p = BUS_MESSAGE_BSWAP16(m, *(uint16_t*) q); | |
9a17484d LP |
2786 | break; |
2787 | ||
2788 | case SD_BUS_TYPE_INT32: | |
2789 | case SD_BUS_TYPE_UINT32: | |
0dcd14b9 LP |
2790 | if (p) |
2791 | *(uint32_t*) p = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
9a17484d LP |
2792 | break; |
2793 | ||
2794 | case SD_BUS_TYPE_INT64: | |
2795 | case SD_BUS_TYPE_UINT64: | |
2796 | case SD_BUS_TYPE_DOUBLE: | |
0dcd14b9 LP |
2797 | if (p) |
2798 | *(uint64_t*) p = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q); | |
9a17484d LP |
2799 | break; |
2800 | ||
2c93b4ef | 2801 | case SD_BUS_TYPE_UNIX_FD: { |
2c93b4ef LP |
2802 | uint32_t j; |
2803 | ||
2804 | j = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
2805 | if (j >= m->n_fds) | |
2806 | return -EBADMSG; | |
2807 | ||
0dcd14b9 LP |
2808 | if (p) |
2809 | *(int*) p = m->fds[j]; | |
2c93b4ef LP |
2810 | break; |
2811 | } | |
2812 | ||
9a17484d LP |
2813 | default: |
2814 | assert_not_reached("Unknown basic type..."); | |
2815 | } | |
2816 | ||
b3af9646 | 2817 | m->rindex = rindex; |
2c93b4ef | 2818 | |
9a17484d LP |
2819 | break; |
2820 | } | |
2821 | } | |
2822 | ||
2823 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2824 | c->index++; | |
2825 | ||
2826 | return 1; | |
de1c301e LP |
2827 | } |
2828 | ||
9a17484d LP |
2829 | static int bus_message_enter_array( |
2830 | sd_bus_message *m, | |
2831 | struct bus_container *c, | |
2832 | const char *contents, | |
2833 | uint32_t **array_size) { | |
2834 | ||
2835 | size_t rindex; | |
2836 | void *q; | |
2837 | int r, alignment; | |
2838 | ||
2839 | assert(m); | |
2840 | assert(c); | |
2841 | assert(contents); | |
2842 | assert(array_size); | |
2843 | ||
29ddb38f | 2844 | if (!signature_is_single(contents, true)) |
de1c301e | 2845 | return -EINVAL; |
9a17484d LP |
2846 | |
2847 | alignment = bus_type_get_alignment(contents[0]); | |
2848 | if (alignment < 0) | |
2849 | return alignment; | |
2850 | ||
2851 | if (!c->signature || c->signature[c->index] == 0) | |
2852 | return 0; | |
2853 | ||
2854 | if (c->signature[c->index] != SD_BUS_TYPE_ARRAY) | |
2855 | return -ENXIO; | |
2856 | ||
2857 | if (!startswith(c->signature + c->index + 1, contents)) | |
2858 | return -ENXIO; | |
2859 | ||
2860 | rindex = m->rindex; | |
2861 | r = message_peek_body(m, &rindex, 4, 4, &q); | |
2862 | if (r <= 0) | |
2863 | return r; | |
2864 | ||
ac89bf1d | 2865 | if (BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q) > BUS_ARRAY_MAX_SIZE) |
80a46c73 | 2866 | return -EBADMSG; |
9a17484d LP |
2867 | |
2868 | r = message_peek_body(m, &rindex, alignment, 0, NULL); | |
2869 | if (r < 0) | |
2870 | return r; | |
2871 | if (r == 0) | |
2872 | return -EBADMSG; | |
2873 | ||
2874 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2875 | c->index += 1 + strlen(contents); | |
2876 | ||
2877 | m->rindex = rindex; | |
2878 | ||
2879 | *array_size = (uint32_t*) q; | |
2880 | ||
2881 | return 1; | |
2882 | } | |
2883 | ||
2884 | static int bus_message_enter_variant( | |
2885 | sd_bus_message *m, | |
2886 | struct bus_container *c, | |
2887 | const char *contents) { | |
2888 | ||
2889 | size_t rindex; | |
2890 | uint8_t l; | |
2891 | void *q; | |
2892 | int r; | |
2893 | ||
2894 | assert(m); | |
2895 | assert(c); | |
2896 | assert(contents); | |
2897 | ||
29ddb38f | 2898 | if (!signature_is_single(contents, false)) |
de1c301e | 2899 | return -EINVAL; |
de1c301e | 2900 | |
9a17484d LP |
2901 | if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN) |
2902 | return -EINVAL; | |
2903 | ||
2904 | if (!c->signature || c->signature[c->index] == 0) | |
2905 | return 0; | |
2906 | ||
2907 | if (c->signature[c->index] != SD_BUS_TYPE_VARIANT) | |
2908 | return -ENXIO; | |
2909 | ||
2910 | rindex = m->rindex; | |
2911 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
2912 | if (r <= 0) | |
2913 | return r; | |
2914 | ||
2915 | l = *(uint8_t*) q; | |
2916 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
2917 | if (r < 0) | |
2918 | return r; | |
2919 | if (r == 0) | |
2920 | return -EBADMSG; | |
2921 | ||
2922 | if (!validate_signature(q, l)) | |
2923 | return -EBADMSG; | |
2924 | ||
2925 | if (!streq(q, contents)) | |
2926 | return -ENXIO; | |
2927 | ||
2928 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2929 | c->index++; | |
2930 | ||
2931 | m->rindex = rindex; | |
2932 | ||
2933 | return 1; | |
de1c301e LP |
2934 | } |
2935 | ||
9a17484d LP |
2936 | static int bus_message_enter_struct( |
2937 | sd_bus_message *m, | |
2938 | struct bus_container *c, | |
2939 | const char *contents) { | |
2940 | ||
2941 | size_t l; | |
2942 | int r; | |
2943 | ||
2944 | assert(m); | |
2945 | assert(c); | |
2946 | assert(contents); | |
2947 | ||
2948 | if (!signature_is_valid(contents, false)) | |
2949 | return -EINVAL; | |
2950 | ||
2951 | if (!c->signature || c->signature[c->index] == 0) | |
2952 | return 0; | |
2953 | ||
2954 | l = strlen(contents); | |
2955 | ||
2956 | if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN || | |
2957 | !startswith(c->signature + c->index + 1, contents) || | |
2958 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END) | |
2959 | return -ENXIO; | |
2960 | ||
2961 | r = message_peek_body(m, &m->rindex, 8, 0, NULL); | |
2962 | if (r <= 0) | |
2963 | return r; | |
2964 | ||
2965 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2966 | c->index += 1 + l + 1; | |
2967 | ||
2968 | return 1; | |
2969 | } | |
2970 | ||
2971 | static int bus_message_enter_dict_entry( | |
2972 | sd_bus_message *m, | |
2973 | struct bus_container *c, | |
2974 | const char *contents) { | |
2975 | ||
2976 | size_t l; | |
2977 | int r; | |
2978 | ||
2979 | assert(m); | |
2980 | assert(c); | |
2981 | assert(contents); | |
2982 | ||
2983 | if (!signature_is_pair(contents)) | |
2984 | return -EINVAL; | |
2985 | ||
2986 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2987 | return -ENXIO; | |
2988 | ||
2989 | if (!c->signature || c->signature[c->index] == 0) | |
2990 | return 0; | |
2991 | ||
2992 | l = strlen(contents); | |
2993 | ||
2994 | if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN || | |
2995 | !startswith(c->signature + c->index + 1, contents) || | |
2996 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END) | |
2997 | return -ENXIO; | |
2998 | ||
2999 | r = message_peek_body(m, &m->rindex, 8, 0, NULL); | |
3000 | if (r <= 0) | |
3001 | return r; | |
3002 | ||
3003 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3004 | c->index += 1 + l + 1; | |
3005 | ||
3006 | return 1; | |
3007 | } | |
3008 | ||
d9f644e2 ZJS |
3009 | _public_ int sd_bus_message_enter_container(sd_bus_message *m, |
3010 | char type, | |
3011 | const char *contents) { | |
9a17484d LP |
3012 | struct bus_container *c, *w; |
3013 | uint32_t *array_size = NULL; | |
3014 | char *signature; | |
b3af9646 | 3015 | size_t before; |
9a17484d LP |
3016 | int r; |
3017 | ||
275b39fe LP |
3018 | assert_return(m, -EINVAL); |
3019 | assert_return(m->sealed, -EPERM); | |
3020 | assert_return(type != 0 || !contents, -EINVAL); | |
3021 | ||
3022 | if (type == 0 || !contents) { | |
3023 | const char *cc; | |
3024 | char tt; | |
3025 | ||
3026 | /* Allow entering into anonymous containers */ | |
3027 | r = sd_bus_message_peek_type(m, &tt, &cc); | |
3028 | if (r <= 0) | |
3029 | return r; | |
3030 | ||
3031 | if (type != 0 && type != tt) | |
3032 | return -ENXIO; | |
3033 | ||
3034 | if (contents && !streq(contents, cc)) | |
3035 | return -ENXIO; | |
3036 | ||
3037 | type = tt; | |
3038 | contents = cc; | |
3039 | } | |
9a17484d | 3040 | |
ed205a6b LP |
3041 | /* |
3042 | * We enforce a global limit on container depth, that is much | |
3043 | * higher than the 32 structs and 32 arrays the specification | |
3044 | * mandates. This is simpler to implement for us, and we need | |
3045 | * this only to ensure our container array doesn't grow | |
3046 | * without bounds. We are happy to return any data from a | |
3047 | * message as long as the data itself is valid, even if the | |
3048 | * overall message might be not. | |
3049 | * | |
3050 | * Note that the message signature is validated when | |
3051 | * parsing the headers, and that validation does check the | |
3052 | * 32/32 limit. | |
3053 | * | |
3054 | * Note that the specification defines no limits on the depth | |
3055 | * of stacked variants, but we do. | |
3056 | */ | |
3057 | if (m->n_containers >= BUS_CONTAINER_DEPTH) | |
3058 | return -EBADMSG; | |
3059 | ||
9a17484d LP |
3060 | w = realloc(m->containers, sizeof(struct bus_container) * (m->n_containers + 1)); |
3061 | if (!w) | |
3062 | return -ENOMEM; | |
3063 | m->containers = w; | |
3064 | ||
7b058942 | 3065 | if (message_end_of_signature(m)) |
430fb8fa | 3066 | return -ENXIO; |
9a17484d | 3067 | |
1daf8121 LP |
3068 | if (message_end_of_array(m, m->rindex)) |
3069 | return 0; | |
3070 | ||
7b058942 LP |
3071 | c = message_get_container(m); |
3072 | ||
9a17484d LP |
3073 | signature = strdup(contents); |
3074 | if (!signature) | |
3075 | return -ENOMEM; | |
3076 | ||
b3af9646 LP |
3077 | c->saved_index = c->index; |
3078 | before = m->rindex; | |
3079 | ||
9a17484d LP |
3080 | if (type == SD_BUS_TYPE_ARRAY) |
3081 | r = bus_message_enter_array(m, c, contents, &array_size); | |
3082 | else if (type == SD_BUS_TYPE_VARIANT) | |
3083 | r = bus_message_enter_variant(m, c, contents); | |
3084 | else if (type == SD_BUS_TYPE_STRUCT) | |
3085 | r = bus_message_enter_struct(m, c, contents); | |
3086 | else if (type == SD_BUS_TYPE_DICT_ENTRY) | |
3087 | r = bus_message_enter_dict_entry(m, c, contents); | |
3088 | else | |
3089 | r = -EINVAL; | |
3090 | ||
3091 | if (r <= 0) { | |
3092 | free(signature); | |
3093 | return r; | |
3094 | } | |
3095 | ||
3096 | /* OK, let's fill it in */ | |
3097 | w += m->n_containers++; | |
3098 | w->enclosing = type; | |
3099 | w->signature = signature; | |
3100 | w->index = 0; | |
3101 | w->array_size = array_size; | |
b3af9646 | 3102 | w->before = before; |
9a17484d LP |
3103 | w->begin = m->rindex; |
3104 | ||
3105 | return 1; | |
3106 | } | |
3107 | ||
d9f644e2 | 3108 | _public_ int sd_bus_message_exit_container(sd_bus_message *m) { |
9a17484d LP |
3109 | struct bus_container *c; |
3110 | ||
9d6c7c82 LP |
3111 | assert_return(m, -EINVAL); |
3112 | assert_return(m->sealed, -EPERM); | |
f959af20 | 3113 | assert_return(m->n_containers > 0, -ENXIO); |
9a17484d LP |
3114 | |
3115 | c = message_get_container(m); | |
3116 | if (c->enclosing == SD_BUS_TYPE_ARRAY) { | |
3117 | uint32_t l; | |
3118 | ||
3119 | l = BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
3120 | if (c->begin + l != m->rindex) | |
3121 | return -EBUSY; | |
3122 | ||
3123 | } else { | |
3124 | if (c->signature && c->signature[c->index] != 0) | |
f959af20 | 3125 | return -EBUSY; |
9a17484d LP |
3126 | } |
3127 | ||
3128 | free(c->signature); | |
3129 | m->n_containers--; | |
3130 | ||
3131 | return 1; | |
3132 | } | |
3133 | ||
b3af9646 LP |
3134 | static void message_quit_container(sd_bus_message *m) { |
3135 | struct bus_container *c; | |
3136 | ||
3137 | assert(m); | |
3138 | assert(m->sealed); | |
3139 | assert(m->n_containers > 0); | |
3140 | ||
3141 | c = message_get_container(m); | |
3142 | ||
3143 | /* Undo seeks */ | |
3144 | assert(m->rindex >= c->before); | |
3145 | m->rindex = c->before; | |
3146 | ||
3147 | /* Free container */ | |
3148 | free(c->signature); | |
3149 | m->n_containers--; | |
3150 | ||
3151 | /* Correct index of new top-level container */ | |
3152 | c = message_get_container(m); | |
3153 | c->index = c->saved_index; | |
3154 | } | |
3155 | ||
d9f644e2 | 3156 | _public_ int sd_bus_message_peek_type(sd_bus_message *m, char *type, const char **contents) { |
9a17484d LP |
3157 | struct bus_container *c; |
3158 | int r; | |
3159 | ||
c430fee6 LP |
3160 | assert_return(m, -EINVAL); |
3161 | assert_return(m->sealed, -EPERM); | |
9a17484d | 3162 | |
7b058942 | 3163 | if (message_end_of_signature(m)) |
9a17484d LP |
3164 | goto eof; |
3165 | ||
3166 | if (message_end_of_array(m, m->rindex)) | |
3167 | goto eof; | |
3168 | ||
7b058942 LP |
3169 | c = message_get_container(m); |
3170 | ||
9a17484d LP |
3171 | if (bus_type_is_basic(c->signature[c->index])) { |
3172 | if (contents) | |
3173 | *contents = NULL; | |
3174 | if (type) | |
3175 | *type = c->signature[c->index]; | |
3176 | return 1; | |
3177 | } | |
3178 | ||
3179 | if (c->signature[c->index] == SD_BUS_TYPE_ARRAY) { | |
3180 | ||
3181 | if (contents) { | |
3182 | size_t l; | |
3183 | char *sig; | |
3184 | ||
3185 | r = signature_element_length(c->signature+c->index+1, &l); | |
3186 | if (r < 0) | |
3187 | return r; | |
3188 | ||
80a46c73 LP |
3189 | assert(l >= 1); |
3190 | ||
9a17484d LP |
3191 | sig = strndup(c->signature + c->index + 1, l); |
3192 | if (!sig) | |
3193 | return -ENOMEM; | |
3194 | ||
3195 | free(m->peeked_signature); | |
3196 | m->peeked_signature = sig; | |
3197 | ||
3198 | *contents = sig; | |
3199 | } | |
3200 | ||
3201 | if (type) | |
3202 | *type = SD_BUS_TYPE_ARRAY; | |
3203 | ||
3204 | return 1; | |
3205 | } | |
3206 | ||
3207 | if (c->signature[c->index] == SD_BUS_TYPE_STRUCT_BEGIN || | |
3208 | c->signature[c->index] == SD_BUS_TYPE_DICT_ENTRY_BEGIN) { | |
3209 | ||
3210 | if (contents) { | |
3211 | size_t l; | |
3212 | char *sig; | |
3213 | ||
3214 | r = signature_element_length(c->signature+c->index, &l); | |
3215 | if (r < 0) | |
3216 | return r; | |
3217 | ||
3218 | assert(l >= 2); | |
3219 | sig = strndup(c->signature + c->index + 1, l - 2); | |
3220 | if (!sig) | |
3221 | return -ENOMEM; | |
3222 | ||
3223 | free(m->peeked_signature); | |
3224 | m->peeked_signature = sig; | |
3225 | ||
3226 | *contents = sig; | |
3227 | } | |
3228 | ||
3229 | if (type) | |
3230 | *type = c->signature[c->index] == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY; | |
3231 | ||
3232 | return 1; | |
3233 | } | |
3234 | ||
3235 | if (c->signature[c->index] == SD_BUS_TYPE_VARIANT) { | |
3236 | if (contents) { | |
3237 | size_t rindex, l; | |
3238 | void *q; | |
3239 | ||
3240 | rindex = m->rindex; | |
3241 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
3242 | if (r < 0) | |
3243 | return r; | |
3244 | if (r == 0) | |
3245 | goto eof; | |
3246 | ||
3247 | l = *(uint8_t*) q; | |
3248 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
3249 | if (r < 0) | |
3250 | return r; | |
3251 | if (r == 0) | |
3252 | return -EBADMSG; | |
3253 | ||
3254 | if (!validate_signature(q, l)) | |
3255 | return -EBADMSG; | |
3256 | ||
3257 | *contents = q; | |
3258 | } | |
3259 | ||
3260 | if (type) | |
3261 | *type = SD_BUS_TYPE_VARIANT; | |
3262 | ||
3263 | return 1; | |
3264 | } | |
3265 | ||
3266 | return -EINVAL; | |
3267 | ||
3268 | eof: | |
3269 | if (type) | |
7b058942 | 3270 | *type = 0; |
9a17484d LP |
3271 | if (contents) |
3272 | *contents = NULL; | |
3273 | return 0; | |
3274 | } | |
3275 | ||
d9f644e2 | 3276 | _public_ int sd_bus_message_rewind(sd_bus_message *m, int complete) { |
9a17484d LP |
3277 | struct bus_container *c; |
3278 | ||
9d6c7c82 LP |
3279 | assert_return(m, -EINVAL); |
3280 | assert_return(m->sealed, -EPERM); | |
9a17484d LP |
3281 | |
3282 | if (complete) { | |
bc7fd8cd | 3283 | message_reset_containers(m); |
9a17484d LP |
3284 | m->rindex = 0; |
3285 | m->root_container.index = 0; | |
3286 | ||
3287 | c = message_get_container(m); | |
3288 | } else { | |
3289 | c = message_get_container(m); | |
3290 | ||
3291 | c->index = 0; | |
3292 | m->rindex = c->begin; | |
3293 | } | |
3294 | ||
3295 | return !isempty(c->signature); | |
3296 | } | |
718db961 | 3297 | |
1b492614 LP |
3298 | static int message_read_ap( |
3299 | sd_bus_message *m, | |
3300 | const char *types, | |
3301 | va_list ap) { | |
9a17484d | 3302 | |
fe1d424d LP |
3303 | unsigned n_array, n_struct; |
3304 | TypeStack stack[BUS_CONTAINER_DEPTH]; | |
3305 | unsigned stack_ptr = 0; | |
430fb8fa | 3306 | unsigned n_loop = 0; |
9a17484d LP |
3307 | int r; |
3308 | ||
3309 | assert(m); | |
1b492614 | 3310 | |
430fb8fa | 3311 | if (isempty(types)) |
1b492614 | 3312 | return 0; |
9a17484d | 3313 | |
fe1d424d LP |
3314 | /* Ideally, we'd just call ourselves recursively on every |
3315 | * complex type. However, the state of a va_list that is | |
3316 | * passed to a function is undefined after that function | |
3317 | * returns. This means we need to docode the va_list linearly | |
3318 | * in a single stackframe. We hence implement our own | |
3319 | * home-grown stack in an array. */ | |
3320 | ||
430fb8fa LP |
3321 | n_array = (unsigned) -1; /* lenght of current array entries */ |
3322 | n_struct = strlen(types); /* length of current struct contents signature */ | |
fe1d424d LP |
3323 | |
3324 | for (;;) { | |
3325 | const char *t; | |
3326 | ||
430fb8fa LP |
3327 | n_loop++; |
3328 | ||
1b492614 | 3329 | if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) { |
fe1d424d LP |
3330 | r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array); |
3331 | if (r < 0) | |
3332 | return r; | |
3333 | if (r == 0) | |
3334 | break; | |
3335 | ||
3336 | r = sd_bus_message_exit_container(m); | |
3337 | if (r < 0) | |
3338 | return r; | |
3339 | ||
3340 | continue; | |
3341 | } | |
3342 | ||
3343 | t = types; | |
3344 | if (n_array != (unsigned) -1) | |
3345 | n_array --; | |
3346 | else { | |
3347 | types ++; | |
3348 | n_struct--; | |
3349 | } | |
3350 | ||
9a17484d LP |
3351 | switch (*t) { |
3352 | ||
3353 | case SD_BUS_TYPE_BYTE: | |
3354 | case SD_BUS_TYPE_BOOLEAN: | |
3355 | case SD_BUS_TYPE_INT16: | |
3356 | case SD_BUS_TYPE_UINT16: | |
3357 | case SD_BUS_TYPE_INT32: | |
3358 | case SD_BUS_TYPE_UINT32: | |
3359 | case SD_BUS_TYPE_INT64: | |
3360 | case SD_BUS_TYPE_UINT64: | |
3361 | case SD_BUS_TYPE_DOUBLE: | |
3362 | case SD_BUS_TYPE_STRING: | |
3363 | case SD_BUS_TYPE_OBJECT_PATH: | |
2c93b4ef LP |
3364 | case SD_BUS_TYPE_SIGNATURE: |
3365 | case SD_BUS_TYPE_UNIX_FD: { | |
9a17484d LP |
3366 | void *p; |
3367 | ||
3368 | p = va_arg(ap, void*); | |
3369 | r = sd_bus_message_read_basic(m, *t, p); | |
fe1d424d LP |
3370 | if (r < 0) |
3371 | return r; | |
430fb8fa LP |
3372 | if (r == 0) { |
3373 | if (n_loop <= 1) | |
3374 | return 0; | |
3375 | ||
fe1d424d | 3376 | return -ENXIO; |
430fb8fa | 3377 | } |
fe1d424d | 3378 | |
9a17484d LP |
3379 | break; |
3380 | } | |
3381 | ||
3382 | case SD_BUS_TYPE_ARRAY: { | |
3383 | size_t k; | |
3384 | ||
3385 | r = signature_element_length(t + 1, &k); | |
3386 | if (r < 0) | |
3387 | return r; | |
3388 | ||
3389 | { | |
9a17484d | 3390 | char s[k + 1]; |
9a17484d LP |
3391 | memcpy(s, t + 1, k); |
3392 | s[k] = 0; | |
9a17484d LP |
3393 | |
3394 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s); | |
3395 | if (r < 0) | |
3396 | return r; | |
430fb8fa LP |
3397 | if (r == 0) { |
3398 | if (n_loop <= 1) | |
3399 | return 0; | |
3400 | ||
9a17484d | 3401 | return -ENXIO; |
430fb8fa | 3402 | } |
fe1d424d | 3403 | } |
9a17484d | 3404 | |
fe1d424d LP |
3405 | if (n_array == (unsigned) -1) { |
3406 | types += k; | |
3407 | n_struct -= k; | |
9a17484d LP |
3408 | } |
3409 | ||
fe1d424d LP |
3410 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
3411 | if (r < 0) | |
3412 | return r; | |
3413 | ||
3414 | types = t + 1; | |
3415 | n_struct = k; | |
3416 | n_array = va_arg(ap, unsigned); | |
3417 | ||
9a17484d LP |
3418 | break; |
3419 | } | |
3420 | ||
3421 | case SD_BUS_TYPE_VARIANT: { | |
3422 | const char *s; | |
3423 | ||
3424 | s = va_arg(ap, const char *); | |
3425 | if (!s) | |
3426 | return -EINVAL; | |
3427 | ||
3428 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, s); | |
3429 | if (r < 0) | |
3430 | return r; | |
430fb8fa LP |
3431 | if (r == 0) { |
3432 | if (n_loop <= 1) | |
3433 | return 0; | |
3434 | ||
9a17484d | 3435 | return -ENXIO; |
430fb8fa | 3436 | } |
9a17484d | 3437 | |
fe1d424d | 3438 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
9a17484d LP |
3439 | if (r < 0) |
3440 | return r; | |
9a17484d | 3441 | |
fe1d424d LP |
3442 | types = s; |
3443 | n_struct = strlen(s); | |
3444 | n_array = (unsigned) -1; | |
3445 | ||
9a17484d LP |
3446 | break; |
3447 | } | |
3448 | ||
3449 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
3450 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
3451 | size_t k; | |
3452 | ||
3453 | r = signature_element_length(t, &k); | |
3454 | if (r < 0) | |
3455 | return r; | |
3456 | ||
3457 | { | |
3458 | char s[k - 1]; | |
3459 | memcpy(s, t + 1, k - 2); | |
3460 | s[k - 2] = 0; | |
3461 | ||
3462 | r = sd_bus_message_enter_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
3463 | if (r < 0) | |
3464 | return r; | |
430fb8fa LP |
3465 | if (r == 0) { |
3466 | if (n_loop <= 1) | |
3467 | return 0; | |
9a17484d | 3468 | return -ENXIO; |
430fb8fa | 3469 | } |
fe1d424d | 3470 | } |
9a17484d | 3471 | |
fe1d424d LP |
3472 | if (n_array == (unsigned) -1) { |
3473 | types += k - 1; | |
3474 | n_struct -= k - 1; | |
3475 | } | |
9a17484d | 3476 | |
fe1d424d LP |
3477 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
3478 | if (r < 0) | |
3479 | return r; | |
9a17484d | 3480 | |
fe1d424d LP |
3481 | types = t + 1; |
3482 | n_struct = k - 2; | |
3483 | n_array = (unsigned) -1; | |
9a17484d LP |
3484 | |
3485 | break; | |
3486 | } | |
3487 | ||
3488 | default: | |
fe1d424d | 3489 | return -EINVAL; |
9a17484d | 3490 | } |
9a17484d LP |
3491 | } |
3492 | ||
3493 | return 1; | |
3494 | } | |
3495 | ||
d9f644e2 | 3496 | _public_ int sd_bus_message_read(sd_bus_message *m, const char *types, ...) { |
9a17484d LP |
3497 | va_list ap; |
3498 | int r; | |
3499 | ||
9b07511d LP |
3500 | assert_return(m, -EINVAL); |
3501 | assert_return(m->sealed, -EPERM); | |
3502 | assert_return(types, -EINVAL); | |
9a17484d LP |
3503 | |
3504 | va_start(ap, types); | |
3505 | r = message_read_ap(m, types, ap); | |
3506 | va_end(ap); | |
3507 | ||
3508 | return r; | |
3509 | } | |
3510 | ||
d9f644e2 | 3511 | _public_ int sd_bus_message_skip(sd_bus_message *m, const char *types) { |
9b07511d LP |
3512 | int r; |
3513 | ||
3514 | assert_return(m, -EINVAL); | |
3515 | assert_return(m->sealed, -EPERM); | |
3516 | assert_return(types, -EINVAL); | |
3517 | ||
3518 | if (isempty(types)) | |
3519 | return 0; | |
3520 | ||
3521 | switch (*types) { | |
3522 | ||
3523 | case SD_BUS_TYPE_BYTE: | |
3524 | case SD_BUS_TYPE_BOOLEAN: | |
3525 | case SD_BUS_TYPE_INT16: | |
3526 | case SD_BUS_TYPE_UINT16: | |
3527 | case SD_BUS_TYPE_INT32: | |
3528 | case SD_BUS_TYPE_UINT32: | |
3529 | case SD_BUS_TYPE_INT64: | |
3530 | case SD_BUS_TYPE_UINT64: | |
3531 | case SD_BUS_TYPE_DOUBLE: | |
3532 | case SD_BUS_TYPE_STRING: | |
3533 | case SD_BUS_TYPE_OBJECT_PATH: | |
3534 | case SD_BUS_TYPE_SIGNATURE: | |
3535 | case SD_BUS_TYPE_UNIX_FD: | |
3536 | ||
3537 | r = sd_bus_message_read_basic(m, *types, NULL); | |
3538 | if (r <= 0) | |
3539 | return r; | |
3540 | ||
3541 | r = sd_bus_message_skip(m, types + 1); | |
3542 | if (r < 0) | |
3543 | return r; | |
3544 | ||
3545 | return 1; | |
3546 | ||
3547 | case SD_BUS_TYPE_ARRAY: { | |
3548 | size_t k; | |
3549 | ||
3550 | r = signature_element_length(types + 1, &k); | |
3551 | if (r < 0) | |
3552 | return r; | |
3553 | ||
3554 | { | |
3555 | char s[k+1]; | |
3556 | memcpy(s, types+1, k); | |
3557 | s[k] = 0; | |
3558 | ||
3559 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s); | |
3560 | if (r <= 0) | |
3561 | return r; | |
3562 | ||
3563 | for (;;) { | |
3564 | r = sd_bus_message_skip(m, s); | |
3565 | if (r < 0) | |
3566 | return r; | |
3567 | if (r == 0) | |
3568 | break; | |
3569 | } | |
3570 | ||
3571 | r = sd_bus_message_exit_container(m); | |
3572 | if (r < 0) | |
3573 | return r; | |
3574 | } | |
3575 | ||
3576 | r = sd_bus_message_skip(m, types + 1 + k); | |
3577 | if (r < 0) | |
3578 | return r; | |
3579 | ||
3580 | return 1; | |
3581 | } | |
3582 | ||
3583 | case SD_BUS_TYPE_VARIANT: { | |
3584 | const char *contents; | |
3585 | char x; | |
3586 | ||
3587 | r = sd_bus_message_peek_type(m, &x, &contents); | |
3588 | if (r <= 0) | |
3589 | return r; | |
3590 | ||
3591 | if (x != SD_BUS_TYPE_VARIANT) | |
3592 | return -ENXIO; | |
3593 | ||
3594 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents); | |
3595 | if (r <= 0) | |
3596 | return r; | |
3597 | ||
3598 | r = sd_bus_message_skip(m, contents); | |
3599 | if (r < 0) | |
3600 | return r; | |
3601 | assert(r != 0); | |
3602 | ||
3603 | r = sd_bus_message_exit_container(m); | |
3604 | if (r < 0) | |
3605 | return r; | |
3606 | ||
3607 | r = sd_bus_message_skip(m, types + 1); | |
3608 | if (r < 0) | |
3609 | return r; | |
3610 | ||
3611 | return 1; | |
3612 | } | |
3613 | ||
3614 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
3615 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
3616 | size_t k; | |
3617 | ||
3618 | r = signature_element_length(types, &k); | |
3619 | if (r < 0) | |
3620 | return r; | |
3621 | ||
3622 | { | |
3623 | char s[k-1]; | |
3624 | memcpy(s, types+1, k-2); | |
3625 | s[k-2] = 0; | |
3626 | ||
3627 | r = sd_bus_message_enter_container(m, *types == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
3628 | if (r <= 0) | |
3629 | return r; | |
3630 | ||
3631 | r = sd_bus_message_skip(m, s); | |
3632 | if (r < 0) | |
3633 | return r; | |
3634 | assert(r != 0); | |
3635 | ||
3636 | r = sd_bus_message_exit_container(m); | |
3637 | if (r < 0) | |
3638 | return r; | |
3639 | } | |
3640 | ||
3641 | r = sd_bus_message_skip(m, types + k); | |
3642 | if (r < 0) | |
3643 | return r; | |
3644 | ||
3645 | return 1; | |
3646 | } | |
3647 | ||
3648 | default: | |
3649 | return -EINVAL; | |
3650 | } | |
3651 | } | |
3652 | ||
d9f644e2 ZJS |
3653 | _public_ int sd_bus_message_read_array(sd_bus_message *m, |
3654 | char type, | |
3655 | const void **ptr, | |
3656 | size_t *size) { | |
b3af9646 LP |
3657 | struct bus_container *c; |
3658 | void *p; | |
3659 | size_t sz; | |
3660 | ssize_t align; | |
3661 | int r; | |
3662 | ||
9d6c7c82 LP |
3663 | assert_return(m, -EINVAL); |
3664 | assert_return(m->sealed, -EPERM); | |
3665 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
3666 | assert_return(ptr, -EINVAL); | |
3667 | assert_return(size, -EINVAL); | |
3668 | assert_return(!BUS_MESSAGE_NEED_BSWAP(m), -ENOTSUP); | |
b3af9646 LP |
3669 | |
3670 | align = bus_type_get_alignment(type); | |
3671 | if (align < 0) | |
3672 | return align; | |
3673 | ||
3674 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
66b26c5c | 3675 | if (r <= 0) |
b3af9646 LP |
3676 | return r; |
3677 | ||
3678 | c = message_get_container(m); | |
3679 | sz = BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
3680 | ||
5e86fd7b LP |
3681 | if (sz == 0) |
3682 | /* Zero length array, let's return some aligned | |
3683 | * pointer that is not NULL */ | |
3684 | p = (uint8_t*) NULL + align; | |
3685 | else { | |
3686 | r = message_peek_body(m, &m->rindex, align, sz, &p); | |
3687 | if (r < 0) | |
3688 | goto fail; | |
3689 | if (r == 0) { | |
3690 | r = -EBADMSG; | |
3691 | goto fail; | |
3692 | } | |
b3af9646 LP |
3693 | } |
3694 | ||
3695 | r = sd_bus_message_exit_container(m); | |
3696 | if (r < 0) | |
3697 | goto fail; | |
3698 | ||
3699 | *ptr = (const void*) p; | |
3700 | *size = sz; | |
3701 | ||
3702 | return 1; | |
3703 | ||
3704 | fail: | |
3705 | message_quit_container(m); | |
3706 | return r; | |
3707 | } | |
3708 | ||
80a46c73 LP |
3709 | static int message_peek_fields( |
3710 | sd_bus_message *m, | |
3711 | size_t *rindex, | |
3712 | size_t align, | |
3713 | size_t nbytes, | |
3714 | void **ret) { | |
3715 | ||
3716 | assert(m); | |
3717 | assert(rindex); | |
3718 | assert(align > 0); | |
3719 | ||
c91cb83c | 3720 | return buffer_peek(BUS_MESSAGE_FIELDS(m), BUS_MESSAGE_FIELDS_SIZE(m), rindex, align, nbytes, ret); |
80a46c73 LP |
3721 | } |
3722 | ||
9f26c90c LP |
3723 | static int message_peek_field_uint32( |
3724 | sd_bus_message *m, | |
3725 | size_t *ri, | |
3726 | uint32_t *ret) { | |
3727 | ||
3728 | int r; | |
3729 | void *q; | |
3730 | ||
3731 | assert(m); | |
3732 | assert(ri); | |
3733 | ||
3734 | r = message_peek_fields(m, ri, 4, 4, &q); | |
3735 | if (r < 0) | |
3736 | return r; | |
3737 | ||
3738 | if (ret) | |
3739 | *ret = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3740 | ||
3741 | return 0; | |
3742 | } | |
3743 | ||
80a46c73 LP |
3744 | static int message_peek_field_string( |
3745 | sd_bus_message *m, | |
6693860f | 3746 | bool (*validate)(const char *p), |
80a46c73 LP |
3747 | size_t *ri, |
3748 | const char **ret) { | |
3749 | ||
9f26c90c | 3750 | uint32_t l; |
80a46c73 LP |
3751 | int r; |
3752 | void *q; | |
3753 | ||
9a17484d | 3754 | assert(m); |
80a46c73 LP |
3755 | assert(ri); |
3756 | ||
9f26c90c | 3757 | r = message_peek_field_uint32(m, ri, &l); |
80a46c73 LP |
3758 | if (r < 0) |
3759 | return r; | |
3760 | ||
80a46c73 LP |
3761 | r = message_peek_fields(m, ri, 1, l+1, &q); |
3762 | if (r < 0) | |
3763 | return r; | |
9a17484d | 3764 | |
6693860f LP |
3765 | if (validate) { |
3766 | if (!validate_nul(q, l)) | |
3767 | return -EBADMSG; | |
3768 | ||
3769 | if (!validate(q)) | |
ac89bf1d LP |
3770 | return -EBADMSG; |
3771 | } else { | |
3772 | if (!validate_string(q, l)) | |
3773 | return -EBADMSG; | |
3774 | } | |
80a46c73 LP |
3775 | |
3776 | if (ret) | |
3777 | *ret = q; | |
3778 | ||
3779 | return 0; | |
3780 | } | |
3781 | ||
3782 | static int message_peek_field_signature( | |
3783 | sd_bus_message *m, | |
3784 | size_t *ri, | |
3785 | const char **ret) { | |
3786 | ||
3787 | size_t l; | |
3788 | int r; | |
3789 | void *q; | |
3790 | ||
3791 | assert(m); | |
3792 | assert(ri); | |
3793 | ||
3794 | r = message_peek_fields(m, ri, 1, 1, &q); | |
3795 | if (r < 0) | |
3796 | return r; | |
3797 | ||
3798 | l = *(uint8_t*) q; | |
3799 | r = message_peek_fields(m, ri, 1, l+1, &q); | |
3800 | if (r < 0) | |
3801 | return r; | |
3802 | ||
3803 | if (!validate_signature(q, l)) | |
3804 | return -EBADMSG; | |
3805 | ||
3806 | if (ret) | |
3807 | *ret = q; | |
3808 | ||
3809 | return 0; | |
3810 | } | |
3811 | ||
80a46c73 LP |
3812 | static int message_skip_fields( |
3813 | sd_bus_message *m, | |
3814 | size_t *ri, | |
3815 | uint32_t array_size, | |
3816 | const char **signature) { | |
3817 | ||
3818 | size_t original_index; | |
3819 | int r; | |
3820 | ||
3821 | assert(m); | |
3822 | assert(ri); | |
3823 | assert(signature); | |
3824 | ||
3825 | original_index = *ri; | |
3826 | ||
3827 | for (;;) { | |
3828 | char t; | |
80a46c73 LP |
3829 | size_t l; |
3830 | ||
3831 | if (array_size != (uint32_t) -1 && | |
3832 | array_size <= *ri - original_index) | |
3833 | return 0; | |
3834 | ||
3835 | t = **signature; | |
3836 | if (!t) | |
3837 | return 0; | |
3838 | ||
6693860f LP |
3839 | if (t == SD_BUS_TYPE_STRING) { |
3840 | ||
3841 | r = message_peek_field_string(m, NULL, ri, NULL); | |
3842 | if (r < 0) | |
3843 | return r; | |
3844 | ||
3845 | (*signature)++; | |
3846 | ||
3847 | } else if (t == SD_BUS_TYPE_OBJECT_PATH) { | |
80a46c73 | 3848 | |
6693860f | 3849 | r = message_peek_field_string(m, object_path_is_valid, ri, NULL); |
80a46c73 LP |
3850 | if (r < 0) |
3851 | return r; | |
3852 | ||
3853 | (*signature)++; | |
3854 | ||
3855 | } else if (t == SD_BUS_TYPE_SIGNATURE) { | |
3856 | ||
3857 | r = message_peek_field_signature(m, ri, NULL); | |
3858 | if (r < 0) | |
3859 | return r; | |
3860 | ||
3861 | (*signature)++; | |
3862 | ||
3863 | } else if (bus_type_is_basic(t)) { | |
27f6e5c7 | 3864 | ssize_t align, k; |
80a46c73 | 3865 | |
c66a2e0c TG |
3866 | align = bus_type_get_alignment(t); |
3867 | k = bus_type_get_size(t); | |
27f6e5c7 | 3868 | assert(align > 0 && k > 0); |
80a46c73 LP |
3869 | |
3870 | r = message_peek_fields(m, ri, align, k, NULL); | |
3871 | if (r < 0) | |
3872 | return r; | |
9a17484d | 3873 | |
80a46c73 LP |
3874 | (*signature)++; |
3875 | ||
3876 | } else if (t == SD_BUS_TYPE_ARRAY) { | |
3877 | ||
3878 | r = signature_element_length(*signature+1, &l); | |
3879 | if (r < 0) | |
3880 | return r; | |
3881 | ||
3882 | assert(l >= 1); | |
3883 | { | |
3884 | char sig[l-1], *s; | |
9f26c90c | 3885 | uint32_t nas; |
80a46c73 LP |
3886 | int alignment; |
3887 | ||
3888 | strncpy(sig, *signature + 1, l-1); | |
3889 | s = sig; | |
3890 | ||
3891 | alignment = bus_type_get_alignment(sig[0]); | |
3892 | if (alignment < 0) | |
3893 | return alignment; | |
3894 | ||
9f26c90c | 3895 | r = message_peek_field_uint32(m, ri, &nas); |
80a46c73 LP |
3896 | if (r < 0) |
3897 | return r; | |
ac89bf1d | 3898 | if (nas > BUS_ARRAY_MAX_SIZE) |
80a46c73 LP |
3899 | return -EBADMSG; |
3900 | ||
3901 | r = message_peek_fields(m, ri, alignment, 0, NULL); | |
3902 | if (r < 0) | |
3903 | return r; | |
3904 | ||
3905 | r = message_skip_fields(m, ri, nas, (const char**) &s); | |
3906 | if (r < 0) | |
3907 | return r; | |
3908 | } | |
3909 | ||
3910 | (*signature) += 1 + l; | |
3911 | ||
3912 | } else if (t == SD_BUS_TYPE_VARIANT) { | |
3913 | const char *s; | |
3914 | ||
3915 | r = message_peek_field_signature(m, ri, &s); | |
3916 | if (r < 0) | |
3917 | return r; | |
3918 | ||
3919 | r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s); | |
3920 | if (r < 0) | |
3921 | return r; | |
3922 | ||
3923 | (*signature)++; | |
3924 | ||
3925 | } else if (t == SD_BUS_TYPE_STRUCT || | |
3926 | t == SD_BUS_TYPE_DICT_ENTRY) { | |
3927 | ||
3928 | r = signature_element_length(*signature, &l); | |
3929 | if (r < 0) | |
3930 | return r; | |
3931 | ||
3932 | assert(l >= 2); | |
3933 | { | |
3934 | char sig[l-1], *s; | |
3935 | strncpy(sig, *signature + 1, l-1); | |
3936 | s = sig; | |
3937 | ||
3938 | r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s); | |
3939 | if (r < 0) | |
3940 | return r; | |
3941 | } | |
3942 | ||
3943 | *signature += l; | |
3944 | } else | |
3945 | return -EINVAL; | |
3946 | } | |
3947 | } | |
3948 | ||
6629161f | 3949 | int bus_message_parse_fields(sd_bus_message *m) { |
80a46c73 LP |
3950 | size_t ri; |
3951 | int r; | |
2c93b4ef | 3952 | uint32_t unix_fds = 0; |
80a46c73 LP |
3953 | |
3954 | assert(m); | |
3955 | ||
3956 | for (ri = 0; ri < BUS_MESSAGE_FIELDS_SIZE(m); ) { | |
3957 | const char *signature; | |
3958 | uint8_t *header; | |
3959 | ||
3960 | r = message_peek_fields(m, &ri, 8, 1, (void**) &header); | |
3961 | if (r < 0) | |
3962 | return r; | |
3963 | ||
3964 | r = message_peek_field_signature(m, &ri, &signature); | |
3965 | if (r < 0) | |
3966 | return r; | |
3967 | ||
3968 | switch (*header) { | |
3969 | case _SD_BUS_MESSAGE_HEADER_INVALID: | |
3970 | return -EBADMSG; | |
3971 | ||
3972 | case SD_BUS_MESSAGE_HEADER_PATH: | |
2c93b4ef LP |
3973 | |
3974 | if (m->path) | |
3975 | return -EBADMSG; | |
3976 | ||
80a46c73 LP |
3977 | if (!streq(signature, "o")) |
3978 | return -EBADMSG; | |
3979 | ||
6693860f | 3980 | r = message_peek_field_string(m, object_path_is_valid, &ri, &m->path); |
80a46c73 LP |
3981 | break; |
3982 | ||
3983 | case SD_BUS_MESSAGE_HEADER_INTERFACE: | |
2c93b4ef LP |
3984 | |
3985 | if (m->interface) | |
3986 | return -EBADMSG; | |
3987 | ||
80a46c73 LP |
3988 | if (!streq(signature, "s")) |
3989 | return -EBADMSG; | |
3990 | ||
6693860f | 3991 | r = message_peek_field_string(m, interface_name_is_valid, &ri, &m->interface); |
80a46c73 LP |
3992 | break; |
3993 | ||
3994 | case SD_BUS_MESSAGE_HEADER_MEMBER: | |
2c93b4ef LP |
3995 | |
3996 | if (m->member) | |
3997 | return -EBADMSG; | |
3998 | ||
80a46c73 LP |
3999 | if (!streq(signature, "s")) |
4000 | return -EBADMSG; | |
4001 | ||
6693860f | 4002 | r = message_peek_field_string(m, member_name_is_valid, &ri, &m->member); |
80a46c73 LP |
4003 | break; |
4004 | ||
4005 | case SD_BUS_MESSAGE_HEADER_ERROR_NAME: | |
2c93b4ef LP |
4006 | |
4007 | if (m->error.name) | |
4008 | return -EBADMSG; | |
4009 | ||
80a46c73 LP |
4010 | if (!streq(signature, "s")) |
4011 | return -EBADMSG; | |
4012 | ||
6693860f | 4013 | r = message_peek_field_string(m, error_name_is_valid, &ri, &m->error.name); |
80a46c73 LP |
4014 | break; |
4015 | ||
4016 | case SD_BUS_MESSAGE_HEADER_DESTINATION: | |
2c93b4ef LP |
4017 | |
4018 | if (m->destination) | |
4019 | return -EBADMSG; | |
4020 | ||
80a46c73 LP |
4021 | if (!streq(signature, "s")) |
4022 | return -EBADMSG; | |
4023 | ||
dbb642af | 4024 | r = message_peek_field_string(m, sender_name_is_valid, &ri, &m->destination); |
80a46c73 LP |
4025 | break; |
4026 | ||
4027 | case SD_BUS_MESSAGE_HEADER_SENDER: | |
2c93b4ef LP |
4028 | |
4029 | if (m->sender) | |
4030 | return -EBADMSG; | |
4031 | ||
80a46c73 LP |
4032 | if (!streq(signature, "s")) |
4033 | return -EBADMSG; | |
4034 | ||
dbb642af | 4035 | r = message_peek_field_string(m, sender_name_is_valid, &ri, &m->sender); |
80a46c73 LP |
4036 | break; |
4037 | ||
4038 | ||
4039 | case SD_BUS_MESSAGE_HEADER_SIGNATURE: { | |
4040 | const char *s; | |
4041 | char *c; | |
4042 | ||
2c93b4ef LP |
4043 | if (m->root_container.signature) |
4044 | return -EBADMSG; | |
4045 | ||
80a46c73 LP |
4046 | if (!streq(signature, "g")) |
4047 | return -EBADMSG; | |
4048 | ||
4049 | r = message_peek_field_signature(m, &ri, &s); | |
4050 | if (r < 0) | |
4051 | return r; | |
4052 | ||
4053 | c = strdup(s); | |
4054 | if (!c) | |
4055 | return -ENOMEM; | |
4056 | ||
4057 | free(m->root_container.signature); | |
4058 | m->root_container.signature = c; | |
80a46c73 LP |
4059 | break; |
4060 | } | |
4061 | ||
4062 | case SD_BUS_MESSAGE_HEADER_REPLY_SERIAL: | |
2c93b4ef LP |
4063 | if (m->reply_serial != 0) |
4064 | return -EBADMSG; | |
4065 | ||
80a46c73 LP |
4066 | if (!streq(signature, "u")) |
4067 | return -EBADMSG; | |
4068 | ||
4069 | r = message_peek_field_uint32(m, &ri, &m->reply_serial); | |
6693860f LP |
4070 | if (r < 0) |
4071 | return r; | |
4072 | ||
4073 | if (m->reply_serial == 0) | |
4074 | return -EBADMSG; | |
4075 | ||
80a46c73 LP |
4076 | break; |
4077 | ||
2c93b4ef LP |
4078 | case SD_BUS_MESSAGE_HEADER_UNIX_FDS: |
4079 | if (unix_fds != 0) | |
4080 | return -EBADMSG; | |
4081 | ||
4082 | if (!streq(signature, "u")) | |
4083 | return -EBADMSG; | |
4084 | ||
4085 | r = message_peek_field_uint32(m, &ri, &unix_fds); | |
4086 | if (r < 0) | |
4087 | return -EBADMSG; | |
4088 | ||
4089 | if (unix_fds == 0) | |
4090 | return -EBADMSG; | |
4091 | ||
4092 | break; | |
4093 | ||
80a46c73 LP |
4094 | default: |
4095 | r = message_skip_fields(m, &ri, (uint32_t) -1, (const char **) &signature); | |
4096 | } | |
4097 | ||
4098 | if (r < 0) | |
4099 | return r; | |
4100 | } | |
4101 | ||
2c93b4ef LP |
4102 | if (m->n_fds != unix_fds) |
4103 | return -EBADMSG; | |
4104 | ||
80a46c73 LP |
4105 | if (isempty(m->root_container.signature) != (BUS_MESSAGE_BODY_SIZE(m) == 0)) |
4106 | return -EBADMSG; | |
4107 | ||
4108 | switch (m->header->type) { | |
4109 | ||
40ca29a1 | 4110 | case SD_BUS_MESSAGE_SIGNAL: |
80a46c73 LP |
4111 | if (!m->path || !m->interface || !m->member) |
4112 | return -EBADMSG; | |
4113 | break; | |
4114 | ||
40ca29a1 | 4115 | case SD_BUS_MESSAGE_METHOD_CALL: |
80a46c73 LP |
4116 | |
4117 | if (!m->path || !m->member) | |
4118 | return -EBADMSG; | |
4119 | ||
4120 | break; | |
4121 | ||
40ca29a1 | 4122 | case SD_BUS_MESSAGE_METHOD_RETURN: |
80a46c73 LP |
4123 | |
4124 | if (m->reply_serial == 0) | |
4125 | return -EBADMSG; | |
4126 | break; | |
4127 | ||
40ca29a1 | 4128 | case SD_BUS_MESSAGE_METHOD_ERROR: |
80a46c73 LP |
4129 | |
4130 | if (m->reply_serial == 0 || !m->error.name) | |
4131 | return -EBADMSG; | |
4132 | break; | |
4133 | } | |
9a17484d | 4134 | |
89ffcd2a | 4135 | /* Try to read the error message, but if we can't it's a non-issue */ |
40ca29a1 | 4136 | if (m->header->type == SD_BUS_MESSAGE_METHOD_ERROR) |
89ffcd2a LP |
4137 | sd_bus_message_read(m, "s", &m->error.message); |
4138 | ||
9a17484d LP |
4139 | return 0; |
4140 | } | |
4141 | ||
9a17484d | 4142 | int bus_message_seal(sd_bus_message *m, uint64_t serial) { |
47e6ce32 | 4143 | struct bus_body_part *part; |
69aec65c | 4144 | size_t l, a; |
47e6ce32 LP |
4145 | unsigned i; |
4146 | int r; | |
9a17484d LP |
4147 | |
4148 | assert(m); | |
4149 | ||
4150 | if (m->sealed) | |
4151 | return -EPERM; | |
4152 | ||
4153 | if (m->n_containers > 0) | |
4154 | return -EBADMSG; | |
4155 | ||
13c299d3 LP |
4156 | if (m->poisoned) |
4157 | return -ESTALE; | |
4158 | ||
9a17484d LP |
4159 | /* If there's a non-trivial signature set, then add it in here */ |
4160 | if (!isempty(m->root_container.signature)) { | |
80a46c73 | 4161 | r = message_append_field_signature(m, SD_BUS_MESSAGE_HEADER_SIGNATURE, m->root_container.signature, NULL); |
9a17484d LP |
4162 | if (r < 0) |
4163 | return r; | |
4164 | } | |
4165 | ||
4166 | if (m->n_fds > 0) { | |
4167 | r = message_append_field_uint32(m, SD_BUS_MESSAGE_HEADER_UNIX_FDS, m->n_fds); | |
4168 | if (r < 0) | |
4169 | return r; | |
4170 | } | |
4171 | ||
66b26c5c LP |
4172 | /* Add padding at the end of the fields part, since we know |
4173 | * the body needs to start at an 8 byte alignment. We made | |
4174 | * sure we allocated enough space for this, so all we need to | |
4175 | * do here is to zero it out. */ | |
69aec65c LP |
4176 | l = BUS_MESSAGE_FIELDS_SIZE(m); |
4177 | a = ALIGN8(l) - l; | |
c91cb83c LP |
4178 | if (a > 0) |
4179 | memset((uint8_t*) BUS_MESSAGE_FIELDS(m) + l, 0, a); | |
69aec65c | 4180 | |
66b26c5c LP |
4181 | /* If this is something we can send as memfd, then let's seal |
4182 | the memfd now. Note that we can send memfds as payload only | |
4183 | for directed messages, and not for broadcasts. */ | |
8f155917 | 4184 | if (m->destination && m->bus && m->bus->use_memfd) { |
66b26c5c | 4185 | MESSAGE_FOREACH_PART(part, i, m) |
8f155917 | 4186 | if (part->memfd >= 0 && !part->sealed && (part->size > MEMFD_MIN_SIZE || m->bus->use_memfd < 0)) { |
66b26c5c | 4187 | bus_body_part_unmap(part); |
a392d361 | 4188 | |
66b26c5c LP |
4189 | if (ioctl(part->memfd, KDBUS_CMD_MEMFD_SEAL_SET, 1) >= 0) |
4190 | part->sealed = true; | |
4191 | } | |
4192 | } | |
47e6ce32 | 4193 | |
9a17484d LP |
4194 | m->header->serial = serial; |
4195 | m->sealed = true; | |
4196 | ||
9a17484d LP |
4197 | return 0; |
4198 | } | |
4199 | ||
d9f644e2 | 4200 | _public_ int sd_bus_message_set_destination(sd_bus_message *m, const char *destination) { |
9d6c7c82 LP |
4201 | assert_return(m, -EINVAL); |
4202 | assert_return(destination, -EINVAL); | |
4203 | assert_return(!m->sealed, -EPERM); | |
4204 | assert_return(!m->destination, -EEXIST); | |
9a17484d LP |
4205 | |
4206 | return message_append_field_string(m, SD_BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &m->destination); | |
4207 | } | |
4208 | ||
de1c301e LP |
4209 | int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz) { |
4210 | size_t total; | |
de1c301e | 4211 | void *p, *e; |
bc7fd8cd LP |
4212 | unsigned i; |
4213 | struct bus_body_part *part; | |
de1c301e LP |
4214 | |
4215 | assert(m); | |
4216 | assert(buffer); | |
4217 | assert(sz); | |
4218 | ||
6629161f | 4219 | total = BUS_MESSAGE_SIZE(m); |
de1c301e LP |
4220 | |
4221 | p = malloc(total); | |
4222 | if (!p) | |
4223 | return -ENOMEM; | |
4224 | ||
c91cb83c | 4225 | e = mempcpy(p, m->header, BUS_MESSAGE_BODY_BEGIN(m)); |
9b29bb68 | 4226 | MESSAGE_FOREACH_PART(part, i, m) |
bc7fd8cd | 4227 | e = mempcpy(e, part->data, part->size); |
2100fa10 LP |
4228 | |
4229 | assert(total == (size_t) ((uint8_t*) e - (uint8_t*) p)); | |
de1c301e LP |
4230 | |
4231 | *buffer = p; | |
4232 | *sz = total; | |
4233 | ||
4234 | return 0; | |
4235 | } | |
89ffcd2a LP |
4236 | |
4237 | int bus_message_read_strv_extend(sd_bus_message *m, char ***l) { | |
4238 | int r; | |
4239 | ||
4240 | assert(m); | |
4241 | assert(l); | |
4242 | ||
4243 | r = sd_bus_message_enter_container(m, 'a', "s"); | |
4686d1b6 | 4244 | if (r <= 0) |
89ffcd2a LP |
4245 | return r; |
4246 | ||
4247 | for (;;) { | |
4248 | const char *s; | |
4249 | ||
4250 | r = sd_bus_message_read_basic(m, 's', &s); | |
4251 | if (r < 0) | |
4252 | return r; | |
4253 | if (r == 0) | |
4254 | break; | |
4255 | ||
4256 | r = strv_extend(l, s); | |
4257 | if (r < 0) | |
4258 | return r; | |
4259 | } | |
4260 | ||
4261 | r = sd_bus_message_exit_container(m); | |
4262 | if (r < 0) | |
4263 | return r; | |
4264 | ||
405cd3aa | 4265 | return 1; |
89ffcd2a | 4266 | } |
392d5b37 | 4267 | |
ba341e7c | 4268 | _public_ int sd_bus_message_read_strv(sd_bus_message *m, char ***l) { |
4686d1b6 MAP |
4269 | char **strv = NULL; |
4270 | int r; | |
4271 | ||
4272 | assert_return(m, -EINVAL); | |
4273 | assert_return(m->sealed, -EPERM); | |
4274 | assert_return(l, -EINVAL); | |
4275 | ||
4276 | r = bus_message_read_strv_extend(m, &strv); | |
4277 | if (r <= 0) { | |
4278 | strv_free(strv); | |
4279 | return r; | |
4280 | } | |
4281 | ||
4282 | *l = strv; | |
4283 | return 1; | |
4284 | } | |
4285 | ||
392d5b37 LP |
4286 | const char* bus_message_get_arg(sd_bus_message *m, unsigned i) { |
4287 | int r; | |
42c5aaf3 LP |
4288 | const char *t = NULL; |
4289 | unsigned j; | |
392d5b37 LP |
4290 | |
4291 | assert(m); | |
4292 | ||
4293 | r = sd_bus_message_rewind(m, true); | |
4294 | if (r < 0) | |
4295 | return NULL; | |
4296 | ||
42c5aaf3 LP |
4297 | for (j = 0; j <= i; j++) { |
4298 | char type; | |
4299 | ||
392d5b37 LP |
4300 | r = sd_bus_message_peek_type(m, &type, NULL); |
4301 | if (r < 0) | |
4302 | return NULL; | |
4303 | ||
4304 | if (type != SD_BUS_TYPE_STRING && | |
4305 | type != SD_BUS_TYPE_OBJECT_PATH && | |
4306 | type != SD_BUS_TYPE_SIGNATURE) | |
4307 | return NULL; | |
4308 | ||
4309 | r = sd_bus_message_read_basic(m, type, &t); | |
4310 | if (r < 0) | |
4311 | return NULL; | |
392d5b37 LP |
4312 | } |
4313 | ||
392d5b37 LP |
4314 | return t; |
4315 | } | |
2100fa10 | 4316 | |
c91cb83c LP |
4317 | bool bus_header_is_complete(struct bus_header *h, size_t size) { |
4318 | size_t full; | |
4319 | ||
4320 | assert(h); | |
4321 | assert(size); | |
4322 | ||
4323 | if (size < sizeof(struct bus_header)) | |
4324 | return false; | |
4325 | ||
4326 | full = sizeof(struct bus_header) + | |
4327 | (h->endian == SD_BUS_NATIVE_ENDIAN ? h->fields_size : bswap_32(h->fields_size)); | |
4328 | ||
4329 | return size >= full; | |
4330 | } | |
4331 | ||
4332 | int bus_header_message_size(struct bus_header *h, size_t *sum) { | |
6629161f LP |
4333 | size_t fs, bs; |
4334 | ||
4335 | assert(h); | |
4336 | assert(sum); | |
4337 | ||
4338 | if (h->endian == SD_BUS_NATIVE_ENDIAN) { | |
4339 | fs = h->fields_size; | |
4340 | bs = h->body_size; | |
4341 | } else if (h->endian == SD_BUS_REVERSE_ENDIAN) { | |
4342 | fs = bswap_32(h->fields_size); | |
4343 | bs = bswap_32(h->body_size); | |
4344 | } else | |
4345 | return -EBADMSG; | |
2100fa10 | 4346 | |
6629161f LP |
4347 | *sum = sizeof(struct bus_header) + ALIGN8(fs) + bs; |
4348 | return 0; | |
2100fa10 | 4349 | } |
eb01ba5d | 4350 | |
d9f644e2 | 4351 | _public_ int sd_bus_message_get_errno(sd_bus_message *m) { |
40ca29a1 | 4352 | assert_return(m, -EINVAL); |
eb01ba5d | 4353 | |
40ca29a1 | 4354 | if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) |
eb01ba5d LP |
4355 | return 0; |
4356 | ||
40ca29a1 | 4357 | return sd_bus_error_get_errno(&m->error); |
eb01ba5d | 4358 | } |
29ddb38f | 4359 | |
d9f644e2 | 4360 | _public_ const char* sd_bus_message_get_signature(sd_bus_message *m, int complete) { |
29ddb38f LP |
4361 | struct bus_container *c; |
4362 | ||
9d6c7c82 | 4363 | assert_return(m, NULL); |
29ddb38f LP |
4364 | |
4365 | c = complete ? &m->root_container : message_get_container(m); | |
40ca29a1 | 4366 | return c->signature ?: ""; |
29ddb38f | 4367 | } |
c430fee6 | 4368 | |
d9f644e2 | 4369 | _public_ int sd_bus_message_copy(sd_bus_message *m, sd_bus_message *source, int all) { |
c430fee6 LP |
4370 | bool done_something = false; |
4371 | int r; | |
4372 | ||
80ba3b84 LP |
4373 | assert_return(m, -EINVAL); |
4374 | assert_return(source, -EINVAL); | |
4375 | assert_return(!m->sealed, -EPERM); | |
4376 | assert_return(source->sealed, -EPERM); | |
4377 | ||
c430fee6 LP |
4378 | do { |
4379 | const char *contents; | |
4380 | char type; | |
4381 | union { | |
4382 | uint8_t u8; | |
4383 | uint16_t u16; | |
4384 | int16_t s16; | |
4385 | uint32_t u32; | |
4386 | int32_t s32; | |
4387 | uint64_t u64; | |
4388 | int64_t s64; | |
4389 | double d64; | |
4390 | const char *string; | |
4391 | int i; | |
4392 | } basic; | |
4393 | ||
4394 | r = sd_bus_message_peek_type(source, &type, &contents); | |
4395 | if (r < 0) | |
4396 | return r; | |
4397 | if (r == 0) | |
4398 | break; | |
4399 | ||
4400 | done_something = true; | |
4401 | ||
4402 | if (bus_type_is_container(type) > 0) { | |
4403 | ||
4404 | r = sd_bus_message_enter_container(source, type, contents); | |
4405 | if (r < 0) | |
4406 | return r; | |
4407 | ||
4408 | r = sd_bus_message_open_container(m, type, contents); | |
4409 | if (r < 0) | |
4410 | return r; | |
4411 | ||
4412 | r = sd_bus_message_copy(m, source, true); | |
4413 | if (r < 0) | |
4414 | return r; | |
4415 | ||
4416 | r = sd_bus_message_close_container(m); | |
4417 | if (r < 0) | |
4418 | return r; | |
4419 | ||
4420 | r = sd_bus_message_exit_container(source); | |
4421 | if (r < 0) | |
4422 | return r; | |
4423 | ||
4424 | continue; | |
4425 | } | |
4426 | ||
4427 | r = sd_bus_message_read_basic(source, type, &basic); | |
4428 | if (r < 0) | |
4429 | return r; | |
4430 | ||
4431 | assert(r > 0); | |
4432 | ||
4433 | if (type == SD_BUS_TYPE_OBJECT_PATH || | |
4434 | type == SD_BUS_TYPE_SIGNATURE || | |
4435 | type == SD_BUS_TYPE_STRING) | |
4436 | r = sd_bus_message_append_basic(m, type, basic.string); | |
4437 | else | |
4438 | r = sd_bus_message_append_basic(m, type, &basic); | |
4439 | ||
4440 | if (r < 0) | |
4441 | return r; | |
4442 | ||
4443 | } while (all); | |
4444 | ||
4445 | return done_something; | |
4446 | } | |
4447 | ||
d9f644e2 | 4448 | _public_ int sd_bus_message_verify_type(sd_bus_message *m, char type, const char *contents) { |
c430fee6 LP |
4449 | const char *c; |
4450 | char t; | |
4451 | int r; | |
4452 | ||
4453 | assert_return(m, -EINVAL); | |
4454 | assert_return(m->sealed, -EPERM); | |
4455 | assert_return(!type || bus_type_is_valid(type), -EINVAL); | |
4456 | assert_return(!contents || signature_is_valid(contents, true), -EINVAL); | |
4457 | assert_return(type || contents, -EINVAL); | |
4458 | assert_return(!contents || !type || bus_type_is_container(type), -EINVAL); | |
4459 | ||
4460 | r = sd_bus_message_peek_type(m, &t, &c); | |
4461 | if (r <= 0) | |
4462 | return r; | |
4463 | ||
4464 | if (type != 0 && type != t) | |
4465 | return 0; | |
4466 | ||
4467 | if (contents && !streq_ptr(contents, c)) | |
4468 | return 0; | |
4469 | ||
4470 | return 1; | |
4471 | } |