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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; | |
1d0e3c98 | 132 | ioctl(m->bus->input_fd, KDBUS_CMD_FREE, &off); |
62b3e928 | 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 | ||
bc7fd8cd | 146 | message_reset_containers(m); |
9a17484d | 147 | free(m->root_container.signature); |
de1c301e | 148 | |
9a17484d | 149 | free(m->peeked_signature); |
d8d3d8a7 | 150 | |
5b12334d | 151 | bus_creds_done(&m->creds); |
de1c301e LP |
152 | free(m); |
153 | } | |
154 | ||
c91cb83c LP |
155 | static void *message_extend_fields(sd_bus_message *m, size_t align, size_t sz) { |
156 | void *op, *np; | |
157 | size_t old_size, new_size, start; | |
de1c301e | 158 | |
c91cb83c | 159 | assert(m); |
de1c301e | 160 | |
c91cb83c | 161 | if (m->poisoned) |
de1c301e LP |
162 | return NULL; |
163 | ||
c91cb83c LP |
164 | old_size = sizeof(struct bus_header) + m->header->fields_size; |
165 | start = ALIGN_TO(old_size, align); | |
166 | new_size = start + sz; | |
de1c301e | 167 | |
c91cb83c LP |
168 | if (old_size == new_size) |
169 | return (uint8_t*) m->header + old_size; | |
de1c301e | 170 | |
c91cb83c LP |
171 | if (new_size > (size_t) ((uint32_t) -1)) |
172 | goto poison; | |
de1c301e | 173 | |
c91cb83c LP |
174 | if (m->free_header) { |
175 | np = realloc(m->header, ALIGN8(new_size)); | |
176 | if (!np) | |
177 | goto poison; | |
178 | } else { | |
179 | /* Initially, the header is allocated as part of of | |
180 | * the sd_bus_message itself, let's replace it by | |
181 | * dynamic data */ | |
de1c301e | 182 | |
c91cb83c LP |
183 | np = malloc(ALIGN8(new_size)); |
184 | if (!np) | |
185 | goto poison; | |
de1c301e | 186 | |
c91cb83c LP |
187 | memcpy(np, m->header, sizeof(struct bus_header)); |
188 | } | |
de1c301e | 189 | |
c91cb83c LP |
190 | /* Zero out padding */ |
191 | if (start > old_size) | |
192 | memset((uint8_t*) np + old_size, 0, start - old_size); | |
bc7fd8cd | 193 | |
c91cb83c LP |
194 | op = m->header; |
195 | m->header = np; | |
196 | m->header->fields_size = new_size - sizeof(struct bus_header); | |
de1c301e | 197 | |
bc7fd8cd | 198 | /* Adjust quick access pointers */ |
c91cb83c LP |
199 | m->path = adjust_pointer(m->path, op, old_size, m->header); |
200 | m->interface = adjust_pointer(m->interface, op, old_size, m->header); | |
201 | m->member = adjust_pointer(m->member, op, old_size, m->header); | |
202 | m->destination = adjust_pointer(m->destination, op, old_size, m->header); | |
203 | m->sender = adjust_pointer(m->sender, op, old_size, m->header); | |
204 | m->error.name = adjust_pointer(m->error.name, op, old_size, m->header); | |
bc7fd8cd | 205 | |
c91cb83c | 206 | m->free_header = true; |
de1c301e | 207 | |
c91cb83c LP |
208 | return (uint8_t*) np + start; |
209 | ||
210 | poison: | |
211 | m->poisoned = true; | |
212 | return NULL; | |
de1c301e LP |
213 | } |
214 | ||
215 | static int message_append_field_string( | |
216 | sd_bus_message *m, | |
217 | uint8_t h, | |
218 | char type, | |
219 | const char *s, | |
220 | const char **ret) { | |
221 | ||
222 | size_t l; | |
223 | uint8_t *p; | |
224 | ||
225 | assert(m); | |
226 | ||
227 | l = strlen(s); | |
228 | if (l > (size_t) (uint32_t) -1) | |
229 | return -EINVAL; | |
230 | ||
231 | /* field id byte + signature length + signature 's' + NUL + string length + string + NUL */ | |
232 | p = message_extend_fields(m, 8, 4 + 4 + l + 1); | |
233 | if (!p) | |
234 | return -ENOMEM; | |
235 | ||
236 | p[0] = h; | |
237 | p[1] = 1; | |
238 | p[2] = type; | |
239 | p[3] = 0; | |
240 | ||
241 | ((uint32_t*) p)[1] = l; | |
242 | memcpy(p + 8, s, l + 1); | |
243 | ||
244 | if (ret) | |
bc7fd8cd | 245 | *ret = (char*) p + 8; |
de1c301e LP |
246 | |
247 | return 0; | |
248 | } | |
249 | ||
250 | static int message_append_field_signature( | |
251 | sd_bus_message *m, | |
252 | uint8_t h, | |
253 | const char *s, | |
254 | const char **ret) { | |
255 | ||
256 | size_t l; | |
257 | uint8_t *p; | |
258 | ||
259 | assert(m); | |
260 | ||
261 | l = strlen(s); | |
262 | if (l > 255) | |
263 | return -EINVAL; | |
264 | ||
265 | /* field id byte + signature length + signature 'g' + NUL + string length + string + NUL */ | |
266 | p = message_extend_fields(m, 8, 4 + 1 + l + 1); | |
267 | if (!p) | |
268 | return -ENOMEM; | |
269 | ||
270 | p[0] = h; | |
271 | p[1] = 1; | |
272 | p[2] = SD_BUS_TYPE_SIGNATURE; | |
273 | p[3] = 0; | |
274 | p[4] = l; | |
275 | memcpy(p + 5, s, l + 1); | |
276 | ||
277 | if (ret) | |
278 | *ret = (const char*) p + 5; | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | static int message_append_field_uint32(sd_bus_message *m, uint8_t h, uint32_t x) { | |
284 | uint8_t *p; | |
285 | ||
286 | assert(m); | |
287 | ||
288 | /* field id byte + signature length + signature 'u' + NUL + value */ | |
289 | p = message_extend_fields(m, 8, 4 + 4); | |
290 | if (!p) | |
291 | return -ENOMEM; | |
292 | ||
293 | p[0] = h; | |
294 | p[1] = 1; | |
295 | p[2] = SD_BUS_TYPE_UINT32; | |
296 | p[3] = 0; | |
297 | ||
298 | ((uint32_t*) p)[1] = x; | |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
6629161f | 303 | int bus_message_from_header( |
df2d202e | 304 | sd_bus *bus, |
2571ead1 LP |
305 | void *buffer, |
306 | size_t length, | |
2c93b4ef LP |
307 | int *fds, |
308 | unsigned n_fds, | |
309 | const struct ucred *ucred, | |
2571ead1 | 310 | const char *label, |
6629161f | 311 | size_t extra, |
2571ead1 LP |
312 | sd_bus_message **ret) { |
313 | ||
80a46c73 LP |
314 | sd_bus_message *m; |
315 | struct bus_header *h; | |
6629161f | 316 | size_t a, label_sz; |
80a46c73 LP |
317 | |
318 | assert(buffer || length <= 0); | |
2c93b4ef | 319 | assert(fds || n_fds <= 0); |
80a46c73 LP |
320 | assert(ret); |
321 | ||
322 | if (length < sizeof(struct bus_header)) | |
323 | return -EBADMSG; | |
324 | ||
325 | h = buffer; | |
326 | if (h->version != 1) | |
327 | return -EBADMSG; | |
328 | ||
329 | if (h->serial == 0) | |
330 | return -EBADMSG; | |
331 | ||
332 | if (h->type == _SD_BUS_MESSAGE_TYPE_INVALID) | |
333 | return -EBADMSG; | |
334 | ||
6629161f LP |
335 | if (h->endian != SD_BUS_LITTLE_ENDIAN && |
336 | h->endian != SD_BUS_BIG_ENDIAN) | |
80a46c73 LP |
337 | return -EBADMSG; |
338 | ||
6629161f | 339 | a = ALIGN(sizeof(sd_bus_message)) + ALIGN(extra); |
80a46c73 | 340 | |
2571ead1 LP |
341 | if (label) { |
342 | label_sz = strlen(label); | |
6629161f LP |
343 | a += label_sz + 1; |
344 | } | |
2571ead1 LP |
345 | |
346 | m = malloc0(a); | |
80a46c73 LP |
347 | if (!m) |
348 | return -ENOMEM; | |
349 | ||
350 | m->n_ref = 1; | |
2c93b4ef | 351 | m->sealed = true; |
80a46c73 | 352 | m->header = h; |
2c93b4ef LP |
353 | m->fds = fds; |
354 | m->n_fds = n_fds; | |
80a46c73 | 355 | |
2571ead1 | 356 | if (ucred) { |
5b12334d LP |
357 | m->creds.uid = ucred->uid; |
358 | m->creds.pid = ucred->pid; | |
359 | m->creds.gid = ucred->gid; | |
360 | m->creds.mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_PID | SD_BUS_CREDS_GID; | |
2571ead1 LP |
361 | } |
362 | ||
363 | if (label) { | |
5b12334d LP |
364 | m->creds.label = (char*) m + ALIGN(sizeof(sd_bus_message)) + ALIGN(extra); |
365 | memcpy(m->creds.label, label, label_sz + 1); | |
366 | ||
367 | m->creds.mask |= SD_BUS_CREDS_SELINUX_CONTEXT; | |
2571ead1 LP |
368 | } |
369 | ||
df2d202e LP |
370 | if (bus) |
371 | m->bus = sd_bus_ref(bus); | |
372 | ||
6629161f LP |
373 | *ret = m; |
374 | return 0; | |
375 | } | |
376 | ||
377 | int bus_message_from_malloc( | |
df2d202e | 378 | sd_bus *bus, |
6629161f LP |
379 | void *buffer, |
380 | size_t length, | |
381 | int *fds, | |
382 | unsigned n_fds, | |
383 | const struct ucred *ucred, | |
384 | const char *label, | |
385 | sd_bus_message **ret) { | |
386 | ||
387 | sd_bus_message *m; | |
5461f53f | 388 | size_t sz; |
6629161f LP |
389 | int r; |
390 | ||
df2d202e | 391 | r = bus_message_from_header(bus, buffer, length, fds, n_fds, ucred, label, 0, &m); |
6629161f LP |
392 | if (r < 0) |
393 | return r; | |
394 | ||
395 | if (length != BUS_MESSAGE_SIZE(m)) { | |
396 | r = -EBADMSG; | |
397 | goto fail; | |
398 | } | |
399 | ||
5461f53f LP |
400 | sz = length - sizeof(struct bus_header) - ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)); |
401 | if (sz > 0) { | |
402 | m->n_body_parts = 1; | |
403 | m->body.data = (uint8_t*) buffer + sizeof(struct bus_header) + ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)); | |
404 | m->body.size = sz; | |
405 | m->body.sealed = true; | |
406 | m->body.memfd = -1; | |
407 | } | |
6629161f | 408 | |
80a46c73 | 409 | m->n_iovec = 1; |
bc7fd8cd | 410 | m->iovec = m->iovec_fixed; |
80a46c73 LP |
411 | m->iovec[0].iov_base = buffer; |
412 | m->iovec[0].iov_len = length; | |
413 | ||
6629161f | 414 | r = bus_message_parse_fields(m); |
2c93b4ef LP |
415 | if (r < 0) |
416 | goto fail; | |
417 | ||
418 | /* We take possession of the memory and fds now */ | |
419 | m->free_header = true; | |
420 | m->free_fds = true; | |
80a46c73 LP |
421 | |
422 | *ret = m; | |
423 | return 0; | |
2c93b4ef LP |
424 | |
425 | fail: | |
426 | message_free(m); | |
427 | return r; | |
80a46c73 LP |
428 | } |
429 | ||
de1c301e LP |
430 | static sd_bus_message *message_new(sd_bus *bus, uint8_t type) { |
431 | sd_bus_message *m; | |
432 | ||
80a46c73 | 433 | m = malloc0(ALIGN(sizeof(sd_bus_message)) + sizeof(struct bus_header)); |
de1c301e LP |
434 | if (!m) |
435 | return NULL; | |
436 | ||
437 | m->n_ref = 1; | |
438 | m->header = (struct bus_header*) ((uint8_t*) m + ALIGN(sizeof(struct sd_bus_message))); | |
80a46c73 | 439 | m->header->endian = SD_BUS_NATIVE_ENDIAN; |
de1c301e LP |
440 | m->header->type = type; |
441 | m->header->version = bus ? bus->message_version : 1; | |
021a1e78 | 442 | m->allow_fds = !bus || bus->can_fds || (bus->state != BUS_HELLO && bus->state != BUS_RUNNING); |
de1c301e | 443 | |
9b05bc48 LP |
444 | if (bus) |
445 | m->bus = sd_bus_ref(bus); | |
446 | ||
de1c301e LP |
447 | return m; |
448 | } | |
449 | ||
d9f644e2 | 450 | _public_ int sd_bus_message_new_signal( |
de1c301e LP |
451 | sd_bus *bus, |
452 | const char *path, | |
453 | const char *interface, | |
454 | const char *member, | |
455 | sd_bus_message **m) { | |
456 | ||
457 | sd_bus_message *t; | |
458 | int r; | |
459 | ||
9d6c7c82 LP |
460 | assert_return(!bus || bus->state != BUS_UNSET, -ENOTCONN); |
461 | assert_return(object_path_is_valid(path), -EINVAL); | |
462 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
463 | assert_return(member_name_is_valid(member), -EINVAL); | |
464 | assert_return(m, -EINVAL); | |
de1c301e | 465 | |
40ca29a1 | 466 | t = message_new(bus, SD_BUS_MESSAGE_SIGNAL); |
de1c301e LP |
467 | if (!t) |
468 | return -ENOMEM; | |
469 | ||
89ffcd2a LP |
470 | t->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; |
471 | ||
de1c301e LP |
472 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path); |
473 | if (r < 0) | |
474 | goto fail; | |
475 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_INTERFACE, SD_BUS_TYPE_STRING, interface, &t->interface); | |
476 | if (r < 0) | |
477 | goto fail; | |
478 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_MEMBER, SD_BUS_TYPE_STRING, member, &t->member); | |
479 | if (r < 0) | |
480 | goto fail; | |
481 | ||
482 | *m = t; | |
483 | return 0; | |
484 | ||
485 | fail: | |
486 | sd_bus_message_unref(t); | |
487 | return r; | |
488 | } | |
489 | ||
d9f644e2 | 490 | _public_ int sd_bus_message_new_method_call( |
de1c301e LP |
491 | sd_bus *bus, |
492 | const char *destination, | |
493 | const char *path, | |
494 | const char *interface, | |
495 | const char *member, | |
496 | sd_bus_message **m) { | |
497 | ||
498 | sd_bus_message *t; | |
499 | int r; | |
500 | ||
9d6c7c82 LP |
501 | assert_return(!bus || bus->state != BUS_UNSET, -ENOTCONN); |
502 | assert_return(!destination || service_name_is_valid(destination), -EINVAL); | |
503 | assert_return(object_path_is_valid(path), -EINVAL); | |
504 | assert_return(!interface || interface_name_is_valid(interface), -EINVAL); | |
505 | assert_return(member_name_is_valid(member), -EINVAL); | |
506 | assert_return(m, -EINVAL); | |
de1c301e | 507 | |
40ca29a1 | 508 | t = message_new(bus, SD_BUS_MESSAGE_METHOD_CALL); |
de1c301e LP |
509 | if (!t) |
510 | return -ENOMEM; | |
511 | ||
512 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path); | |
513 | if (r < 0) | |
514 | goto fail; | |
515 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_MEMBER, SD_BUS_TYPE_STRING, member, &t->member); | |
516 | if (r < 0) | |
517 | goto fail; | |
518 | ||
519 | if (interface) { | |
520 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_INTERFACE, SD_BUS_TYPE_STRING, interface, &t->interface); | |
521 | if (r < 0) | |
522 | goto fail; | |
523 | } | |
524 | ||
525 | if (destination) { | |
526 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &t->destination); | |
527 | if (r < 0) | |
528 | goto fail; | |
529 | } | |
530 | ||
531 | *m = t; | |
532 | return 0; | |
533 | ||
534 | fail: | |
535 | message_free(t); | |
536 | return r; | |
537 | } | |
538 | ||
5407f2de | 539 | static int message_new_reply( |
de1c301e | 540 | sd_bus_message *call, |
5407f2de | 541 | uint8_t type, |
de1c301e LP |
542 | sd_bus_message **m) { |
543 | ||
544 | sd_bus_message *t; | |
545 | int r; | |
546 | ||
9d6c7c82 LP |
547 | assert_return(call, -EINVAL); |
548 | assert_return(call->sealed, -EPERM); | |
549 | assert_return(call->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); | |
df2d202e | 550 | assert_return(!call->bus || call->bus->state != BUS_UNSET, -ENOTCONN); |
9d6c7c82 | 551 | assert_return(m, -EINVAL); |
de1c301e | 552 | |
df2d202e | 553 | t = message_new(call->bus, type); |
de1c301e LP |
554 | if (!t) |
555 | return -ENOMEM; | |
556 | ||
89ffcd2a | 557 | t->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; |
de1c301e | 558 | t->reply_serial = BUS_MESSAGE_SERIAL(call); |
5407f2de | 559 | |
de1c301e LP |
560 | r = message_append_field_uint32(t, SD_BUS_MESSAGE_HEADER_REPLY_SERIAL, t->reply_serial); |
561 | if (r < 0) | |
562 | goto fail; | |
563 | ||
564 | if (call->sender) { | |
8f155917 | 565 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, call->sender, &t->destination); |
de1c301e LP |
566 | if (r < 0) |
567 | goto fail; | |
568 | } | |
569 | ||
5407f2de LP |
570 | t->dont_send = !!(call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED); |
571 | ||
de1c301e | 572 | *m = t; |
89ffcd2a | 573 | return 0; |
de1c301e LP |
574 | |
575 | fail: | |
576 | message_free(t); | |
577 | return r; | |
578 | } | |
579 | ||
d9f644e2 | 580 | _public_ int sd_bus_message_new_method_return( |
5407f2de LP |
581 | sd_bus_message *call, |
582 | sd_bus_message **m) { | |
583 | ||
df2d202e | 584 | return message_new_reply(call, SD_BUS_MESSAGE_METHOD_RETURN, m); |
5407f2de LP |
585 | } |
586 | ||
d9f644e2 | 587 | _public_ int sd_bus_message_new_method_error( |
de1c301e LP |
588 | sd_bus_message *call, |
589 | const sd_bus_error *e, | |
590 | sd_bus_message **m) { | |
591 | ||
592 | sd_bus_message *t; | |
593 | int r; | |
594 | ||
9d6c7c82 LP |
595 | assert_return(sd_bus_error_is_set(e), -EINVAL); |
596 | assert_return(m, -EINVAL); | |
de1c301e | 597 | |
df2d202e | 598 | r = message_new_reply(call, SD_BUS_MESSAGE_METHOD_ERROR, &t); |
de1c301e | 599 | if (r < 0) |
5407f2de | 600 | return r; |
de1c301e LP |
601 | |
602 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name); | |
603 | if (r < 0) | |
604 | goto fail; | |
605 | ||
606 | if (e->message) { | |
607 | r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message); | |
608 | if (r < 0) | |
609 | goto fail; | |
610 | } | |
611 | ||
612 | *m = t; | |
613 | return 0; | |
614 | ||
615 | fail: | |
616 | message_free(t); | |
617 | return r; | |
618 | } | |
619 | ||
d9f644e2 | 620 | _public_ int sd_bus_message_new_method_errorf( |
29ddb38f LP |
621 | sd_bus_message *call, |
622 | sd_bus_message **m, | |
623 | const char *name, | |
624 | const char *format, | |
625 | ...) { | |
626 | ||
40ca29a1 | 627 | _cleanup_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
29ddb38f | 628 | va_list ap; |
29ddb38f | 629 | |
40ca29a1 LP |
630 | assert_return(name, -EINVAL); |
631 | assert_return(m, -EINVAL); | |
632 | ||
633 | va_start(ap, format); | |
780896a4 | 634 | bus_error_setfv(&error, name, format, ap); |
40ca29a1 | 635 | va_end(ap); |
29ddb38f | 636 | |
df2d202e | 637 | return sd_bus_message_new_method_error(call, &error, m); |
40ca29a1 | 638 | } |
29ddb38f | 639 | |
d9f644e2 | 640 | _public_ int sd_bus_message_new_method_errno( |
40ca29a1 LP |
641 | sd_bus_message *call, |
642 | int error, | |
643 | const sd_bus_error *p, | |
644 | sd_bus_message **m) { | |
29ddb38f | 645 | |
40ca29a1 | 646 | _cleanup_free_ sd_bus_error berror = SD_BUS_ERROR_NULL; |
29ddb38f | 647 | |
40ca29a1 | 648 | if (sd_bus_error_is_set(p)) |
df2d202e | 649 | return sd_bus_message_new_method_error(call, p, m); |
29ddb38f | 650 | |
40ca29a1 | 651 | sd_bus_error_set_errno(&berror, error); |
29ddb38f | 652 | |
df2d202e | 653 | return sd_bus_message_new_method_error(call, &berror, m); |
40ca29a1 | 654 | } |
29ddb38f | 655 | |
d9f644e2 | 656 | _public_ int sd_bus_message_new_method_errnof( |
40ca29a1 LP |
657 | sd_bus_message *call, |
658 | sd_bus_message **m, | |
659 | int error, | |
660 | const char *format, | |
661 | ...) { | |
662 | ||
663 | _cleanup_free_ sd_bus_error berror = SD_BUS_ERROR_NULL; | |
664 | va_list ap; | |
40ca29a1 LP |
665 | |
666 | va_start(ap, format); | |
780896a4 | 667 | bus_error_set_errnofv(&berror, error, format, ap); |
40ca29a1 LP |
668 | va_end(ap); |
669 | ||
df2d202e | 670 | return sd_bus_message_new_method_error(call, &berror, m); |
29ddb38f LP |
671 | } |
672 | ||
eb01ba5d LP |
673 | int bus_message_new_synthetic_error( |
674 | sd_bus *bus, | |
675 | uint64_t serial, | |
676 | const sd_bus_error *e, | |
677 | sd_bus_message **m) { | |
678 | ||
679 | sd_bus_message *t; | |
680 | int r; | |
681 | ||
682 | assert(sd_bus_error_is_set(e)); | |
683 | assert(m); | |
684 | ||
40ca29a1 | 685 | t = message_new(bus, SD_BUS_MESSAGE_METHOD_ERROR); |
eb01ba5d LP |
686 | if (!t) |
687 | return -ENOMEM; | |
688 | ||
689 | t->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; | |
690 | t->reply_serial = serial; | |
691 | ||
692 | r = message_append_field_uint32(t, SD_BUS_MESSAGE_HEADER_REPLY_SERIAL, t->reply_serial); | |
693 | if (r < 0) | |
694 | goto fail; | |
695 | ||
696 | if (bus && bus->unique_name) { | |
697 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, bus->unique_name, &t->destination); | |
698 | if (r < 0) | |
699 | goto fail; | |
700 | } | |
701 | ||
3a7d4f1b LP |
702 | r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name); |
703 | if (r < 0) | |
704 | goto fail; | |
705 | ||
706 | if (e->message) { | |
707 | r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message); | |
708 | if (r < 0) | |
709 | goto fail; | |
710 | } | |
711 | ||
eb01ba5d LP |
712 | *m = t; |
713 | return 0; | |
714 | ||
715 | fail: | |
716 | message_free(t); | |
717 | return r; | |
718 | } | |
719 | ||
d9f644e2 | 720 | _public_ sd_bus_message* sd_bus_message_ref(sd_bus_message *m) { |
9d6c7c82 | 721 | assert_return(m, NULL); |
de1c301e LP |
722 | |
723 | assert(m->n_ref > 0); | |
724 | m->n_ref++; | |
725 | ||
726 | return m; | |
727 | } | |
728 | ||
d9f644e2 | 729 | _public_ sd_bus_message* sd_bus_message_unref(sd_bus_message *m) { |
9d6c7c82 | 730 | assert_return(m, NULL); |
de1c301e LP |
731 | |
732 | assert(m->n_ref > 0); | |
733 | m->n_ref--; | |
734 | ||
735 | if (m->n_ref <= 0) | |
736 | message_free(m); | |
737 | ||
738 | return NULL; | |
739 | } | |
740 | ||
d9f644e2 | 741 | _public_ int sd_bus_message_get_type(sd_bus_message *m, uint8_t *type) { |
9d6c7c82 LP |
742 | assert_return(m, -EINVAL); |
743 | assert_return(type, -EINVAL); | |
de1c301e LP |
744 | |
745 | *type = m->header->type; | |
746 | return 0; | |
747 | } | |
748 | ||
d9f644e2 | 749 | _public_ int sd_bus_message_get_serial(sd_bus_message *m, uint64_t *serial) { |
9d6c7c82 LP |
750 | assert_return(m, -EINVAL); |
751 | assert_return(serial, -EINVAL); | |
752 | assert_return(m->header->serial != 0, -ENOENT); | |
de1c301e LP |
753 | |
754 | *serial = BUS_MESSAGE_SERIAL(m); | |
755 | return 0; | |
756 | } | |
757 | ||
d9f644e2 | 758 | _public_ int sd_bus_message_get_reply_serial(sd_bus_message *m, uint64_t *serial) { |
9d6c7c82 LP |
759 | assert_return(m, -EINVAL); |
760 | assert_return(serial, -EINVAL); | |
761 | assert_return(m->reply_serial != 0, -ENOENT); | |
de1c301e LP |
762 | |
763 | *serial = m->reply_serial; | |
764 | return 0; | |
765 | } | |
766 | ||
d9f644e2 | 767 | _public_ int sd_bus_message_get_no_reply(sd_bus_message *m) { |
9d6c7c82 | 768 | assert_return(m, -EINVAL); |
de1c301e | 769 | |
40ca29a1 | 770 | return m->header->type == SD_BUS_MESSAGE_METHOD_CALL ? !!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) : 0; |
de1c301e LP |
771 | } |
772 | ||
1fee9de5 LP |
773 | _public_ int sd_bus_message_get_no_auto_start(sd_bus_message *m) { |
774 | assert_return(m, -EINVAL); | |
775 | ||
776 | return !!(m->header->flags & SD_BUS_MESSAGE_NO_AUTO_START); | |
777 | } | |
778 | ||
d9f644e2 | 779 | _public_ const char *sd_bus_message_get_path(sd_bus_message *m) { |
9d6c7c82 | 780 | assert_return(m, NULL); |
de1c301e LP |
781 | |
782 | return m->path; | |
783 | } | |
784 | ||
d9f644e2 | 785 | _public_ const char *sd_bus_message_get_interface(sd_bus_message *m) { |
9d6c7c82 | 786 | assert_return(m, NULL); |
de1c301e LP |
787 | |
788 | return m->interface; | |
789 | } | |
790 | ||
d9f644e2 | 791 | _public_ const char *sd_bus_message_get_member(sd_bus_message *m) { |
9d6c7c82 | 792 | assert_return(m, NULL); |
de1c301e LP |
793 | |
794 | return m->member; | |
795 | } | |
d9f644e2 ZJS |
796 | |
797 | _public_ const char *sd_bus_message_get_destination(sd_bus_message *m) { | |
9d6c7c82 | 798 | assert_return(m, NULL); |
de1c301e LP |
799 | |
800 | return m->destination; | |
801 | } | |
802 | ||
d9f644e2 | 803 | _public_ const char *sd_bus_message_get_sender(sd_bus_message *m) { |
9d6c7c82 | 804 | assert_return(m, NULL); |
de1c301e LP |
805 | |
806 | return m->sender; | |
807 | } | |
808 | ||
d9f644e2 | 809 | _public_ const sd_bus_error *sd_bus_message_get_error(sd_bus_message *m) { |
9d6c7c82 LP |
810 | assert_return(m, NULL); |
811 | assert_return(sd_bus_error_is_set(&m->error), NULL); | |
de1c301e LP |
812 | |
813 | return &m->error; | |
814 | } | |
815 | ||
d9f644e2 | 816 | _public_ int sd_bus_message_get_monotonic_timestamp(sd_bus_message *m, uint64_t *usec) { |
9d6c7c82 LP |
817 | assert_return(m, -EINVAL); |
818 | assert_return(usec, -EINVAL); | |
5b12334d | 819 | assert_return(m->monotonic > 0, -ENODATA); |
acb5a3cb | 820 | |
69aec65c | 821 | *usec = m->monotonic; |
acb5a3cb LP |
822 | return 0; |
823 | } | |
824 | ||
d9f644e2 | 825 | _public_ int sd_bus_message_get_realtime_timestamp(sd_bus_message *m, uint64_t *usec) { |
9d6c7c82 LP |
826 | assert_return(m, -EINVAL); |
827 | assert_return(usec, -EINVAL); | |
5b12334d | 828 | assert_return(m->realtime > 0, -ENODATA); |
69aec65c LP |
829 | |
830 | *usec = m->realtime; | |
831 | return 0; | |
832 | } | |
833 | ||
5b12334d LP |
834 | _public_ sd_bus_creds *sd_bus_message_get_creds(sd_bus_message *m) { |
835 | assert_return(m, NULL); | |
102ea8e4 | 836 | |
5b12334d LP |
837 | if (m->creds.mask == 0) |
838 | return NULL; | |
102ea8e4 | 839 | |
5b12334d | 840 | return &m->creds; |
102ea8e4 LP |
841 | } |
842 | ||
d9f644e2 ZJS |
843 | _public_ int sd_bus_message_is_signal(sd_bus_message *m, |
844 | const char *interface, | |
845 | const char *member) { | |
9d6c7c82 | 846 | assert_return(m, -EINVAL); |
de1c301e | 847 | |
40ca29a1 | 848 | if (m->header->type != SD_BUS_MESSAGE_SIGNAL) |
de1c301e LP |
849 | return 0; |
850 | ||
851 | if (interface && (!m->interface || !streq(m->interface, interface))) | |
852 | return 0; | |
853 | ||
854 | if (member && (!m->member || !streq(m->member, member))) | |
855 | return 0; | |
856 | ||
857 | return 1; | |
858 | } | |
859 | ||
d9f644e2 ZJS |
860 | _public_ int sd_bus_message_is_method_call(sd_bus_message *m, |
861 | const char *interface, | |
862 | const char *member) { | |
9d6c7c82 | 863 | assert_return(m, -EINVAL); |
de1c301e | 864 | |
40ca29a1 | 865 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
de1c301e LP |
866 | return 0; |
867 | ||
868 | if (interface && (!m->interface || !streq(m->interface, interface))) | |
869 | return 0; | |
870 | ||
871 | if (member && (!m->member || !streq(m->member, member))) | |
872 | return 0; | |
873 | ||
874 | return 1; | |
875 | } | |
876 | ||
d9f644e2 | 877 | _public_ int sd_bus_message_is_method_error(sd_bus_message *m, const char *name) { |
9d6c7c82 | 878 | assert_return(m, -EINVAL); |
de1c301e | 879 | |
40ca29a1 | 880 | if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) |
de1c301e LP |
881 | return 0; |
882 | ||
883 | if (name && (!m->error.name || !streq(m->error.name, name))) | |
884 | return 0; | |
885 | ||
886 | return 1; | |
887 | } | |
888 | ||
d9f644e2 | 889 | _public_ int sd_bus_message_set_no_reply(sd_bus_message *m, int b) { |
9d6c7c82 LP |
890 | assert_return(m, -EINVAL); |
891 | assert_return(!m->sealed, -EPERM); | |
892 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EPERM); | |
de1c301e LP |
893 | |
894 | if (b) | |
895 | m->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; | |
896 | else | |
897 | m->header->flags &= ~SD_BUS_MESSAGE_NO_REPLY_EXPECTED; | |
898 | ||
899 | return 0; | |
900 | } | |
901 | ||
1fee9de5 LP |
902 | _public_ int sd_bus_message_set_no_auto_start(sd_bus_message *m, int b) { |
903 | assert_return(m, -EINVAL); | |
904 | assert_return(!m->sealed, -EPERM); | |
905 | ||
906 | if (b) | |
907 | m->header->flags |= SD_BUS_MESSAGE_NO_AUTO_START; | |
908 | else | |
909 | m->header->flags &= ~SD_BUS_MESSAGE_NO_AUTO_START; | |
910 | ||
911 | return 0; | |
912 | } | |
913 | ||
de1c301e LP |
914 | static struct bus_container *message_get_container(sd_bus_message *m) { |
915 | assert(m); | |
916 | ||
917 | if (m->n_containers == 0) | |
918 | return &m->root_container; | |
919 | ||
9a17484d LP |
920 | assert(m->containers); |
921 | return m->containers + m->n_containers - 1; | |
de1c301e LP |
922 | } |
923 | ||
bc7fd8cd LP |
924 | struct bus_body_part *message_append_part(sd_bus_message *m) { |
925 | struct bus_body_part *part; | |
926 | ||
927 | assert(m); | |
928 | ||
929 | if (m->poisoned) | |
930 | return NULL; | |
931 | ||
932 | if (m->n_body_parts <= 0) { | |
933 | part = &m->body; | |
934 | zero(*part); | |
935 | } else { | |
936 | assert(m->body_end); | |
937 | ||
938 | part = new0(struct bus_body_part, 1); | |
939 | if (!part) { | |
940 | m->poisoned = true; | |
941 | return NULL; | |
942 | } | |
943 | ||
944 | m->body_end->next = part; | |
945 | } | |
946 | ||
947 | part->memfd = -1; | |
948 | m->body_end = part; | |
949 | m->n_body_parts ++; | |
950 | ||
951 | return part; | |
952 | } | |
953 | ||
954 | static void part_zero(struct bus_body_part *part, size_t sz) { | |
955 | assert(part); | |
956 | assert(sz > 0); | |
957 | assert(sz < 8); | |
958 | ||
453a0c29 LP |
959 | /* All other fields can be left in their defaults */ |
960 | assert(!part->data); | |
961 | assert(part->memfd < 0); | |
962 | ||
bc7fd8cd | 963 | part->size = sz; |
453a0c29 LP |
964 | part->is_zero = true; |
965 | part->sealed = true; | |
bc7fd8cd LP |
966 | } |
967 | ||
968 | static int part_make_space( | |
969 | struct sd_bus_message *m, | |
970 | struct bus_body_part *part, | |
971 | size_t sz, | |
972 | void **q) { | |
973 | ||
974 | void *n; | |
975 | int r; | |
976 | ||
977 | assert(m); | |
978 | assert(part); | |
979 | assert(!part->sealed); | |
980 | ||
981 | if (m->poisoned) | |
982 | return -ENOMEM; | |
983 | ||
984 | if (!part->data && part->memfd < 0) | |
985 | part->memfd = bus_kernel_pop_memfd(m->bus, &part->data, &part->mapped); | |
986 | ||
987 | if (part->memfd >= 0) { | |
988 | uint64_t u = sz; | |
989 | ||
990 | r = ioctl(part->memfd, KDBUS_CMD_MEMFD_SIZE_SET, &u); | |
991 | if (r < 0) { | |
992 | m->poisoned = true; | |
993 | return -errno; | |
994 | } | |
995 | ||
453a0c29 LP |
996 | if (!part->data || sz > part->mapped) { |
997 | size_t psz = PAGE_ALIGN(sz > 0 ? sz : 1); | |
bc7fd8cd LP |
998 | |
999 | if (part->mapped <= 0) | |
1000 | n = mmap(NULL, psz, PROT_READ|PROT_WRITE, MAP_SHARED, part->memfd, 0); | |
1001 | else | |
1002 | n = mremap(part->data, part->mapped, psz, MREMAP_MAYMOVE); | |
1003 | ||
1004 | if (n == MAP_FAILED) { | |
1005 | m->poisoned = true; | |
1006 | return -errno; | |
1007 | } | |
1008 | ||
1009 | part->mapped = psz; | |
1010 | part->data = n; | |
1011 | } | |
bf30e48f KS |
1012 | |
1013 | part->munmap_this = true; | |
bc7fd8cd | 1014 | } else { |
23c6f770 | 1015 | n = realloc(part->data, MAX(sz, 1u)); |
bc7fd8cd LP |
1016 | if (!n) { |
1017 | m->poisoned = true; | |
1018 | return -ENOMEM; | |
1019 | } | |
1020 | ||
1021 | part->data = n; | |
1022 | part->free_this = true; | |
1023 | } | |
1024 | ||
1025 | if (q) | |
1026 | *q = part->data ? (uint8_t*) part->data + part->size : NULL; | |
1027 | ||
1028 | part->size = sz; | |
1029 | return 0; | |
1030 | } | |
1031 | ||
453a0c29 | 1032 | static void message_extend_containers(sd_bus_message *m, size_t expand) { |
de1c301e | 1033 | struct bus_container *c; |
453a0c29 LP |
1034 | |
1035 | assert(m); | |
1036 | ||
1037 | if (expand <= 0) | |
1038 | return; | |
1039 | ||
1040 | /* Update counters */ | |
1041 | for (c = m->containers; c < m->containers + m->n_containers; c++) | |
1042 | if (c->array_size) | |
1043 | *c->array_size += expand; | |
453a0c29 LP |
1044 | } |
1045 | ||
1046 | static void *message_extend_body(sd_bus_message *m, size_t align, size_t sz) { | |
bc7fd8cd LP |
1047 | struct bus_body_part *part = NULL; |
1048 | size_t start_body, end_body, padding, start_part, end_part, added; | |
1049 | bool add_new_part; | |
1050 | void *p; | |
1051 | int r; | |
de1c301e LP |
1052 | |
1053 | assert(m); | |
9a17484d | 1054 | assert(align > 0); |
bc7fd8cd | 1055 | assert(!m->sealed); |
de1c301e | 1056 | |
bc7fd8cd LP |
1057 | if (m->poisoned) |
1058 | return NULL; | |
de1c301e | 1059 | |
bc7fd8cd LP |
1060 | start_body = ALIGN_TO((size_t) m->header->body_size, align); |
1061 | end_body = start_body + sz; | |
1062 | ||
1063 | padding = start_body - m->header->body_size; | |
1064 | added = padding + sz; | |
1065 | ||
1066 | /* Check for 32bit overflows */ | |
1067 | if (end_body > (size_t) ((uint32_t) -1)) { | |
1068 | m->poisoned = true; | |
de1c301e | 1069 | return NULL; |
bc7fd8cd | 1070 | } |
de1c301e | 1071 | |
bc7fd8cd LP |
1072 | add_new_part = |
1073 | m->n_body_parts <= 0 || | |
1074 | m->body_end->sealed || | |
1075 | padding != ALIGN_TO(m->body_end->size, align) - m->body_end->size; | |
de1c301e | 1076 | |
bc7fd8cd LP |
1077 | if (add_new_part) { |
1078 | if (padding > 0) { | |
1079 | part = message_append_part(m); | |
1080 | if (!part) | |
1081 | return NULL; | |
1082 | ||
1083 | part_zero(part, padding); | |
1084 | } | |
1085 | ||
1086 | part = message_append_part(m); | |
1087 | if (!part) | |
1088 | return NULL; | |
1089 | ||
1090 | r = part_make_space(m, part, sz, &p); | |
1091 | if (r < 0) | |
1092 | return NULL; | |
1093 | } else { | |
453a0c29 | 1094 | struct bus_container *c; |
bc7fd8cd LP |
1095 | void *op; |
1096 | size_t os; | |
1097 | ||
1098 | part = m->body_end; | |
1099 | op = part->data; | |
1100 | os = part->size; | |
1101 | ||
1102 | start_part = ALIGN_TO(part->size, align); | |
1103 | end_part = start_part + sz; | |
1104 | ||
1105 | r = part_make_space(m, part, end_part, &p); | |
1106 | if (r < 0) | |
1107 | return NULL; | |
1108 | ||
1109 | if (padding > 0) { | |
1110 | memset(p, 0, padding); | |
1111 | p = (uint8_t*) p + padding; | |
de1c301e LP |
1112 | } |
1113 | ||
bc7fd8cd LP |
1114 | /* Readjust pointers */ |
1115 | for (c = m->containers; c < m->containers + m->n_containers; c++) | |
1116 | c->array_size = adjust_pointer(c->array_size, op, os, part->data); | |
1117 | ||
1118 | m->error.message = (const char*) adjust_pointer(m->error.message, op, os, part->data); | |
de1c301e LP |
1119 | } |
1120 | ||
bc7fd8cd | 1121 | m->header->body_size = end_body; |
453a0c29 | 1122 | message_extend_containers(m, added); |
de1c301e LP |
1123 | |
1124 | return p; | |
1125 | } | |
1126 | ||
1127 | int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored) { | |
1128 | struct bus_container *c; | |
27f6e5c7 | 1129 | ssize_t align, sz; |
de1c301e LP |
1130 | uint32_t k; |
1131 | void *a; | |
2c93b4ef | 1132 | int fd = -1; |
62cfa9da | 1133 | uint32_t fdi = 0; |
2c93b4ef | 1134 | int r; |
de1c301e | 1135 | |
9d6c7c82 | 1136 | assert_return(m, -EINVAL); |
9d6c7c82 LP |
1137 | assert_return(!m->sealed, -EPERM); |
1138 | assert_return(bus_type_is_basic(type), -EINVAL); | |
1139 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
1140 | |
1141 | c = message_get_container(m); | |
1142 | ||
1143 | if (c->signature && c->signature[c->index]) { | |
1144 | /* Container signature is already set */ | |
1145 | ||
1146 | if (c->signature[c->index] != type) | |
9a17484d | 1147 | return -ENXIO; |
de1c301e | 1148 | } else { |
5cbe7492 LP |
1149 | char *e; |
1150 | ||
de1c301e LP |
1151 | /* Maybe we can append to the signature? But only if this is the top-level container*/ |
1152 | if (c->enclosing != 0) | |
9a17484d | 1153 | return -ENXIO; |
de1c301e LP |
1154 | |
1155 | e = strextend(&c->signature, CHAR_TO_STR(type), NULL); | |
bc7fd8cd LP |
1156 | if (!e) { |
1157 | m->poisoned = true; | |
de1c301e | 1158 | return -ENOMEM; |
bc7fd8cd | 1159 | } |
de1c301e LP |
1160 | } |
1161 | ||
de1c301e LP |
1162 | switch (type) { |
1163 | ||
1164 | case SD_BUS_TYPE_STRING: | |
cd6f997f LP |
1165 | /* To make things easy we'll serialize a NULL string |
1166 | * into the empty string */ | |
1167 | p = strempty(p); | |
1168 | ||
1169 | /* Fall through... */ | |
de1c301e | 1170 | case SD_BUS_TYPE_OBJECT_PATH: |
b8beb278 | 1171 | |
cd6f997f LP |
1172 | if (!p) { |
1173 | r = -EINVAL; | |
1174 | goto fail; | |
1175 | } | |
1176 | ||
de1c301e LP |
1177 | align = 4; |
1178 | sz = 4 + strlen(p) + 1; | |
1179 | break; | |
1180 | ||
1181 | case SD_BUS_TYPE_SIGNATURE: | |
b8beb278 | 1182 | |
cd6f997f LP |
1183 | if (!p) { |
1184 | r = -EINVAL; | |
1185 | goto fail; | |
1186 | } | |
1187 | ||
de1c301e LP |
1188 | align = 1; |
1189 | sz = 1 + strlen(p) + 1; | |
1190 | break; | |
1191 | ||
1192 | case SD_BUS_TYPE_BOOLEAN: | |
b3273daf | 1193 | |
15912917 KS |
1194 | if (!p) { |
1195 | r = -EINVAL; | |
1196 | goto fail; | |
1197 | } | |
1198 | ||
de1c301e LP |
1199 | align = sz = 4; |
1200 | ||
1201 | assert_cc(sizeof(int) == sizeof(uint32_t)); | |
1202 | memcpy(&k, p, 4); | |
1203 | k = !!k; | |
1204 | p = &k; | |
1205 | break; | |
1206 | ||
2c93b4ef LP |
1207 | case SD_BUS_TYPE_UNIX_FD: { |
1208 | int z, *f; | |
1209 | ||
15912917 KS |
1210 | if (!p) { |
1211 | r = -EINVAL; | |
1212 | goto fail; | |
1213 | } | |
1214 | ||
2c93b4ef LP |
1215 | if (!m->allow_fds) { |
1216 | r = -ENOTSUP; | |
1217 | goto fail; | |
1218 | } | |
1219 | ||
1220 | align = sz = 4; | |
1221 | ||
1222 | z = *(int*) p; | |
1223 | if (z < 0) { | |
1224 | r = -EINVAL; | |
1225 | goto fail; | |
1226 | } | |
1227 | ||
1228 | fd = fcntl(z, F_DUPFD_CLOEXEC, 3); | |
1229 | if (fd < 0) { | |
1230 | r = -errno; | |
1231 | goto fail; | |
1232 | } | |
1233 | ||
1234 | f = realloc(m->fds, sizeof(int) * (m->n_fds + 1)); | |
1235 | if (!f) { | |
bc7fd8cd | 1236 | m->poisoned = true; |
2c93b4ef LP |
1237 | r = -ENOMEM; |
1238 | goto fail; | |
1239 | } | |
1240 | ||
1241 | fdi = m->n_fds; | |
1242 | f[fdi] = fd; | |
1243 | m->fds = f; | |
1244 | m->free_fds = true; | |
1245 | break; | |
1246 | } | |
1247 | ||
de1c301e | 1248 | default: |
b3273daf LP |
1249 | if (!p) { |
1250 | r = -EINVAL; | |
1251 | goto fail; | |
1252 | } | |
1253 | ||
de1c301e LP |
1254 | align = bus_type_get_alignment(type); |
1255 | sz = bus_type_get_size(type); | |
1256 | break; | |
1257 | } | |
1258 | ||
1259 | assert(align > 0); | |
1260 | assert(sz > 0); | |
1261 | ||
1262 | a = message_extend_body(m, align, sz); | |
1263 | if (!a) { | |
2c93b4ef LP |
1264 | r = -ENOMEM; |
1265 | goto fail; | |
de1c301e LP |
1266 | } |
1267 | ||
1268 | if (type == SD_BUS_TYPE_STRING || type == SD_BUS_TYPE_OBJECT_PATH) { | |
1269 | *(uint32_t*) a = sz - 5; | |
1270 | memcpy((uint8_t*) a + 4, p, sz - 4); | |
1271 | ||
1272 | if (stored) | |
1273 | *stored = (const uint8_t*) a + 4; | |
1274 | ||
1275 | } else if (type == SD_BUS_TYPE_SIGNATURE) { | |
1276 | *(uint8_t*) a = sz - 1; | |
1277 | memcpy((uint8_t*) a + 1, p, sz - 1); | |
1278 | ||
1279 | if (stored) | |
1280 | *stored = (const uint8_t*) a + 1; | |
2c93b4ef LP |
1281 | } else if (type == SD_BUS_TYPE_UNIX_FD) { |
1282 | *(uint32_t*) a = fdi; | |
1283 | ||
1284 | if (stored) | |
1285 | *stored = a; | |
1286 | ||
1287 | m->n_fds ++; | |
de1c301e LP |
1288 | |
1289 | } else { | |
1290 | memcpy(a, p, sz); | |
1291 | ||
1292 | if (stored) | |
1293 | *stored = a; | |
1294 | } | |
1295 | ||
1296 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1297 | c->index++; |
de1c301e LP |
1298 | |
1299 | return 0; | |
2c93b4ef LP |
1300 | |
1301 | fail: | |
2c93b4ef LP |
1302 | if (fd >= 0) |
1303 | close_nointr_nofail(fd); | |
1304 | ||
1305 | return r; | |
de1c301e LP |
1306 | } |
1307 | ||
d9f644e2 | 1308 | _public_ int sd_bus_message_append_basic(sd_bus_message *m, char type, const void *p) { |
de1c301e LP |
1309 | return message_append_basic(m, type, p, NULL); |
1310 | } | |
1311 | ||
938bcbab LP |
1312 | _public_ int sd_bus_message_append_string_space( |
1313 | sd_bus_message *m, | |
1314 | size_t size, | |
1315 | char **s) { | |
1316 | ||
f8e013f8 | 1317 | struct bus_container *c; |
f8e013f8 | 1318 | void *a; |
f8e013f8 | 1319 | |
9d6c7c82 LP |
1320 | assert_return(m, -EINVAL); |
1321 | assert_return(s, -EINVAL); | |
1322 | assert_return(!m->sealed, -EPERM); | |
1323 | assert_return(!m->poisoned, -ESTALE); | |
f8e013f8 LP |
1324 | |
1325 | c = message_get_container(m); | |
1326 | ||
1327 | if (c->signature && c->signature[c->index]) { | |
1328 | /* Container signature is already set */ | |
1329 | ||
1330 | if (c->signature[c->index] != SD_BUS_TYPE_STRING) | |
1331 | return -ENXIO; | |
1332 | } else { | |
5cbe7492 LP |
1333 | char *e; |
1334 | ||
f8e013f8 LP |
1335 | /* Maybe we can append to the signature? But only if this is the top-level container*/ |
1336 | if (c->enclosing != 0) | |
1337 | return -ENXIO; | |
1338 | ||
1339 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL); | |
bc7fd8cd LP |
1340 | if (!e) { |
1341 | m->poisoned = true; | |
f8e013f8 | 1342 | return -ENOMEM; |
bc7fd8cd | 1343 | } |
f8e013f8 LP |
1344 | } |
1345 | ||
f8e013f8 | 1346 | a = message_extend_body(m, 4, 4 + size + 1); |
bc7fd8cd LP |
1347 | if (!a) |
1348 | return -ENOMEM; | |
f8e013f8 LP |
1349 | |
1350 | *(uint32_t*) a = size; | |
1351 | *s = (char*) a + 4; | |
1352 | ||
1353 | (*s)[size] = 0; | |
1354 | ||
1355 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1356 | c->index++; | |
1357 | ||
1358 | return 0; | |
f8e013f8 LP |
1359 | } |
1360 | ||
938bcbab LP |
1361 | _public_ int sd_bus_message_append_string_iovec( |
1362 | sd_bus_message *m, | |
1363 | const struct iovec *iov, | |
1364 | unsigned n) { | |
1365 | ||
1366 | size_t size; | |
1367 | unsigned i; | |
1368 | char *p; | |
1369 | int r; | |
1370 | ||
1371 | assert_return(m, -EINVAL); | |
1372 | assert_return(!m->sealed, -EPERM); | |
1373 | assert_return(iov || n == 0, -EINVAL); | |
1374 | assert_return(!m->poisoned, -ESTALE); | |
1375 | ||
1376 | size = IOVEC_TOTAL_SIZE(iov, n); | |
1377 | ||
1378 | r = sd_bus_message_append_string_space(m, size, &p); | |
1379 | if (r < 0) | |
1380 | return r; | |
1381 | ||
1382 | for (i = 0; i < n; i++) { | |
1383 | ||
1384 | if (iov[i].iov_base) | |
1385 | memcpy(p, iov[i].iov_base, iov[i].iov_len); | |
1386 | else | |
1387 | memset(p, ' ', iov[i].iov_len); | |
1388 | ||
1389 | p += iov[i].iov_len; | |
1390 | } | |
1391 | ||
1392 | return 0; | |
1393 | } | |
1394 | ||
de1c301e LP |
1395 | static int bus_message_open_array( |
1396 | sd_bus_message *m, | |
1397 | struct bus_container *c, | |
1398 | const char *contents, | |
1399 | uint32_t **array_size) { | |
1400 | ||
9a17484d | 1401 | unsigned nindex; |
bc7fd8cd | 1402 | void *a, *op; |
de1c301e | 1403 | int alignment; |
bc7fd8cd LP |
1404 | size_t os; |
1405 | struct bus_body_part *o; | |
de1c301e LP |
1406 | |
1407 | assert(m); | |
1408 | assert(c); | |
1409 | assert(contents); | |
1410 | assert(array_size); | |
1411 | ||
29ddb38f | 1412 | if (!signature_is_single(contents, true)) |
de1c301e LP |
1413 | return -EINVAL; |
1414 | ||
1415 | alignment = bus_type_get_alignment(contents[0]); | |
1416 | if (alignment < 0) | |
1417 | return alignment; | |
1418 | ||
1419 | if (c->signature && c->signature[c->index]) { | |
1420 | ||
1421 | /* Verify the existing signature */ | |
1422 | ||
1423 | if (c->signature[c->index] != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1424 | return -ENXIO; |
de1c301e LP |
1425 | |
1426 | if (!startswith(c->signature + c->index + 1, contents)) | |
9a17484d | 1427 | return -ENXIO; |
de1c301e LP |
1428 | |
1429 | nindex = c->index + 1 + strlen(contents); | |
1430 | } else { | |
5cbe7492 LP |
1431 | char *e; |
1432 | ||
de1c301e | 1433 | if (c->enclosing != 0) |
9a17484d | 1434 | return -ENXIO; |
de1c301e LP |
1435 | |
1436 | /* Extend the existing signature */ | |
1437 | ||
1438 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_ARRAY), contents, NULL); | |
bc7fd8cd LP |
1439 | if (!e) { |
1440 | m->poisoned = true; | |
de1c301e | 1441 | return -ENOMEM; |
bc7fd8cd | 1442 | } |
de1c301e LP |
1443 | |
1444 | nindex = e - c->signature; | |
1445 | } | |
1446 | ||
de1c301e | 1447 | a = message_extend_body(m, 4, 4); |
bc7fd8cd | 1448 | if (!a) |
de1c301e | 1449 | return -ENOMEM; |
de1c301e | 1450 | |
bc7fd8cd LP |
1451 | o = m->body_end; |
1452 | op = m->body_end->data; | |
1453 | os = m->body_end->size; | |
de1c301e | 1454 | |
bc7fd8cd LP |
1455 | /* Add alignment between size and first element */ |
1456 | if (!message_extend_body(m, alignment, 0)) | |
de1c301e | 1457 | return -ENOMEM; |
de1c301e LP |
1458 | |
1459 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1460 | c->index = nindex; | |
1461 | ||
bc7fd8cd LP |
1462 | /* location of array size might have changed so let's readjust a */ |
1463 | if (o == m->body_end) | |
1464 | a = adjust_pointer(a, op, os, m->body_end->data); | |
de1c301e | 1465 | |
bc7fd8cd | 1466 | *(uint32_t*) a = 0; |
de1c301e LP |
1467 | *array_size = a; |
1468 | return 0; | |
1469 | } | |
1470 | ||
1471 | static int bus_message_open_variant( | |
1472 | sd_bus_message *m, | |
1473 | struct bus_container *c, | |
1474 | const char *contents) { | |
1475 | ||
9a17484d | 1476 | size_t l; |
de1c301e LP |
1477 | void *a; |
1478 | ||
1479 | assert(m); | |
1480 | assert(c); | |
1481 | assert(contents); | |
1482 | ||
29ddb38f | 1483 | if (!signature_is_single(contents, false)) |
de1c301e LP |
1484 | return -EINVAL; |
1485 | ||
1486 | if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN) | |
1487 | return -EINVAL; | |
1488 | ||
1489 | if (c->signature && c->signature[c->index]) { | |
1490 | ||
1491 | if (c->signature[c->index] != SD_BUS_TYPE_VARIANT) | |
9a17484d | 1492 | return -ENXIO; |
de1c301e LP |
1493 | |
1494 | } else { | |
5cbe7492 LP |
1495 | char *e; |
1496 | ||
de1c301e | 1497 | if (c->enclosing != 0) |
9a17484d | 1498 | return -ENXIO; |
de1c301e LP |
1499 | |
1500 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_VARIANT), NULL); | |
bc7fd8cd LP |
1501 | if (!e) { |
1502 | m->poisoned = true; | |
de1c301e | 1503 | return -ENOMEM; |
bc7fd8cd | 1504 | } |
de1c301e LP |
1505 | } |
1506 | ||
de1c301e LP |
1507 | l = strlen(contents); |
1508 | a = message_extend_body(m, 1, 1 + l + 1); | |
bc7fd8cd | 1509 | if (!a) |
de1c301e | 1510 | return -ENOMEM; |
de1c301e LP |
1511 | |
1512 | *(uint8_t*) a = l; | |
1513 | memcpy((uint8_t*) a + 1, contents, l + 1); | |
1514 | ||
1515 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1516 | c->index++; |
de1c301e LP |
1517 | |
1518 | return 0; | |
1519 | } | |
1520 | ||
1521 | static int bus_message_open_struct( | |
1522 | sd_bus_message *m, | |
1523 | struct bus_container *c, | |
1524 | const char *contents) { | |
1525 | ||
1526 | size_t nindex; | |
de1c301e LP |
1527 | |
1528 | assert(m); | |
1529 | assert(c); | |
1530 | assert(contents); | |
1531 | ||
1532 | if (!signature_is_valid(contents, false)) | |
1533 | return -EINVAL; | |
1534 | ||
1535 | if (c->signature && c->signature[c->index]) { | |
1536 | size_t l; | |
1537 | ||
1538 | l = strlen(contents); | |
1539 | ||
1540 | if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN || | |
1541 | !startswith(c->signature + c->index + 1, contents) || | |
1542 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END) | |
9a17484d | 1543 | return -ENXIO; |
de1c301e LP |
1544 | |
1545 | nindex = c->index + 1 + l + 1; | |
1546 | } else { | |
5cbe7492 LP |
1547 | char *e; |
1548 | ||
de1c301e | 1549 | if (c->enclosing != 0) |
9a17484d | 1550 | return -ENXIO; |
de1c301e LP |
1551 | |
1552 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_BEGIN), contents, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_END), NULL); | |
bc7fd8cd LP |
1553 | if (!e) { |
1554 | m->poisoned = true; | |
de1c301e | 1555 | return -ENOMEM; |
bc7fd8cd | 1556 | } |
de1c301e LP |
1557 | |
1558 | nindex = e - c->signature; | |
1559 | } | |
1560 | ||
1561 | /* Align contents to 8 byte boundary */ | |
bc7fd8cd | 1562 | if (!message_extend_body(m, 8, 0)) |
de1c301e | 1563 | return -ENOMEM; |
de1c301e LP |
1564 | |
1565 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1566 | c->index = nindex; | |
1567 | ||
1568 | return 0; | |
1569 | } | |
1570 | ||
1571 | static int bus_message_open_dict_entry( | |
1572 | sd_bus_message *m, | |
1573 | struct bus_container *c, | |
1574 | const char *contents) { | |
1575 | ||
1576 | size_t nindex; | |
1577 | ||
1578 | assert(m); | |
1579 | assert(c); | |
1580 | assert(contents); | |
1581 | ||
1582 | if (!signature_is_pair(contents)) | |
1583 | return -EINVAL; | |
1584 | ||
1585 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1586 | return -ENXIO; |
de1c301e LP |
1587 | |
1588 | if (c->signature && c->signature[c->index]) { | |
1589 | size_t l; | |
1590 | ||
1591 | l = strlen(contents); | |
1592 | ||
1593 | if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN || | |
1594 | !startswith(c->signature + c->index + 1, contents) || | |
1595 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END) | |
9a17484d | 1596 | return -ENXIO; |
de1c301e LP |
1597 | |
1598 | nindex = c->index + 1 + l + 1; | |
1599 | } else | |
9a17484d | 1600 | return -ENXIO; |
de1c301e LP |
1601 | |
1602 | /* Align contents to 8 byte boundary */ | |
1603 | if (!message_extend_body(m, 8, 0)) | |
1604 | return -ENOMEM; | |
1605 | ||
1606 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1607 | c->index = nindex; | |
1608 | ||
1609 | return 0; | |
1610 | } | |
1611 | ||
d9f644e2 | 1612 | _public_ int sd_bus_message_open_container( |
de1c301e LP |
1613 | sd_bus_message *m, |
1614 | char type, | |
1615 | const char *contents) { | |
1616 | ||
9a17484d | 1617 | struct bus_container *c, *w; |
de1c301e | 1618 | uint32_t *array_size = NULL; |
9a17484d | 1619 | char *signature; |
b3af9646 | 1620 | size_t before; |
de1c301e LP |
1621 | int r; |
1622 | ||
9d6c7c82 LP |
1623 | assert_return(m, -EINVAL); |
1624 | assert_return(!m->sealed, -EPERM); | |
1625 | assert_return(contents, -EINVAL); | |
1626 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
1627 | |
1628 | /* Make sure we have space for one more container */ | |
9a17484d | 1629 | w = realloc(m->containers, sizeof(struct bus_container) * (m->n_containers + 1)); |
bc7fd8cd LP |
1630 | if (!w) { |
1631 | m->poisoned = true; | |
de1c301e | 1632 | return -ENOMEM; |
bc7fd8cd LP |
1633 | } |
1634 | ||
9a17484d | 1635 | m->containers = w; |
de1c301e LP |
1636 | |
1637 | c = message_get_container(m); | |
1638 | ||
1639 | signature = strdup(contents); | |
bc7fd8cd LP |
1640 | if (!signature) { |
1641 | m->poisoned = true; | |
de1c301e | 1642 | return -ENOMEM; |
bc7fd8cd | 1643 | } |
de1c301e | 1644 | |
b3af9646 LP |
1645 | /* Save old index in the parent container, in case we have to |
1646 | * abort this container */ | |
1647 | c->saved_index = c->index; | |
1648 | before = m->header->body_size; | |
1649 | ||
de1c301e LP |
1650 | if (type == SD_BUS_TYPE_ARRAY) |
1651 | r = bus_message_open_array(m, c, contents, &array_size); | |
1652 | else if (type == SD_BUS_TYPE_VARIANT) | |
1653 | r = bus_message_open_variant(m, c, contents); | |
1654 | else if (type == SD_BUS_TYPE_STRUCT) | |
1655 | r = bus_message_open_struct(m, c, contents); | |
1656 | else if (type == SD_BUS_TYPE_DICT_ENTRY) | |
1657 | r = bus_message_open_dict_entry(m, c, contents); | |
1658 | else | |
1659 | r = -EINVAL; | |
1660 | ||
1661 | if (r < 0) { | |
1662 | free(signature); | |
1663 | return r; | |
1664 | } | |
1665 | ||
1666 | /* OK, let's fill it in */ | |
9a17484d LP |
1667 | w += m->n_containers++; |
1668 | w->enclosing = type; | |
1669 | w->signature = signature; | |
1670 | w->index = 0; | |
1671 | w->array_size = array_size; | |
b3af9646 LP |
1672 | w->before = before; |
1673 | w->begin = m->rindex; | |
de1c301e LP |
1674 | |
1675 | return 0; | |
1676 | } | |
1677 | ||
d9f644e2 | 1678 | _public_ int sd_bus_message_close_container(sd_bus_message *m) { |
de1c301e LP |
1679 | struct bus_container *c; |
1680 | ||
9d6c7c82 LP |
1681 | assert_return(m, -EINVAL); |
1682 | assert_return(!m->sealed, -EPERM); | |
1683 | assert_return(m->n_containers > 0, -EINVAL); | |
1684 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
1685 | |
1686 | c = message_get_container(m); | |
de1c301e | 1687 | if (c->enclosing != SD_BUS_TYPE_ARRAY) |
9a17484d | 1688 | if (c->signature && c->signature[c->index] != 0) |
de1c301e LP |
1689 | return -EINVAL; |
1690 | ||
1691 | free(c->signature); | |
1692 | m->n_containers--; | |
1693 | ||
1694 | return 0; | |
1695 | } | |
1696 | ||
1b492614 LP |
1697 | typedef struct { |
1698 | const char *types; | |
1699 | unsigned n_struct; | |
1700 | unsigned n_array; | |
1701 | } TypeStack; | |
1702 | ||
1703 | static int type_stack_push(TypeStack *stack, unsigned max, unsigned *i, const char *types, unsigned n_struct, unsigned n_array) { | |
1704 | assert(stack); | |
1705 | assert(max > 0); | |
1706 | ||
1707 | if (*i >= max) | |
1708 | return -EINVAL; | |
1709 | ||
1710 | stack[*i].types = types; | |
1711 | stack[*i].n_struct = n_struct; | |
1712 | stack[*i].n_array = n_array; | |
1713 | (*i)++; | |
1714 | ||
1715 | return 0; | |
1716 | } | |
1717 | ||
1718 | static int type_stack_pop(TypeStack *stack, unsigned max, unsigned *i, const char **types, unsigned *n_struct, unsigned *n_array) { | |
1719 | assert(stack); | |
1720 | assert(max > 0); | |
1721 | assert(types); | |
1722 | assert(n_struct); | |
1723 | assert(n_array); | |
1724 | ||
1725 | if (*i <= 0) | |
1726 | return 0; | |
1727 | ||
1728 | (*i)--; | |
1729 | *types = stack[*i].types; | |
1730 | *n_struct = stack[*i].n_struct; | |
1731 | *n_array = stack[*i].n_array; | |
1732 | ||
1733 | return 1; | |
1734 | } | |
1735 | ||
917b5dc7 | 1736 | int bus_message_append_ap( |
de1c301e LP |
1737 | sd_bus_message *m, |
1738 | const char *types, | |
1739 | va_list ap) { | |
1740 | ||
1b492614 LP |
1741 | unsigned n_array, n_struct; |
1742 | TypeStack stack[BUS_CONTAINER_DEPTH]; | |
1743 | unsigned stack_ptr = 0; | |
de1c301e LP |
1744 | int r; |
1745 | ||
1746 | assert(m); | |
88d331d5 LP |
1747 | |
1748 | if (!types) | |
1749 | return 0; | |
de1c301e | 1750 | |
1b492614 LP |
1751 | n_array = (unsigned) -1; |
1752 | n_struct = strlen(types); | |
1753 | ||
1754 | for (;;) { | |
1755 | const char *t; | |
1756 | ||
1757 | if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) { | |
1758 | r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array); | |
1759 | if (r < 0) | |
1760 | return r; | |
1761 | if (r == 0) | |
1762 | break; | |
1763 | ||
1764 | r = sd_bus_message_close_container(m); | |
1765 | if (r < 0) | |
1766 | return r; | |
1767 | ||
1768 | continue; | |
1769 | } | |
1770 | ||
1771 | t = types; | |
1772 | if (n_array != (unsigned) -1) | |
1773 | n_array --; | |
1774 | else { | |
1775 | types ++; | |
1776 | n_struct--; | |
1777 | } | |
1778 | ||
de1c301e LP |
1779 | switch (*t) { |
1780 | ||
1781 | case SD_BUS_TYPE_BYTE: { | |
1782 | uint8_t x; | |
1783 | ||
1784 | x = (uint8_t) va_arg(ap, int); | |
1785 | r = sd_bus_message_append_basic(m, *t, &x); | |
1786 | break; | |
1787 | } | |
1788 | ||
1789 | case SD_BUS_TYPE_BOOLEAN: | |
1790 | case SD_BUS_TYPE_INT32: | |
9a17484d LP |
1791 | case SD_BUS_TYPE_UINT32: |
1792 | case SD_BUS_TYPE_UNIX_FD: { | |
de1c301e LP |
1793 | uint32_t x; |
1794 | ||
9a17484d LP |
1795 | /* We assume a boolean is the same as int32_t */ |
1796 | assert_cc(sizeof(int32_t) == sizeof(int)); | |
1797 | ||
de1c301e LP |
1798 | x = va_arg(ap, uint32_t); |
1799 | r = sd_bus_message_append_basic(m, *t, &x); | |
1800 | break; | |
1801 | } | |
1802 | ||
1803 | case SD_BUS_TYPE_INT16: | |
1804 | case SD_BUS_TYPE_UINT16: { | |
1805 | uint16_t x; | |
1806 | ||
1807 | x = (uint16_t) va_arg(ap, int); | |
1808 | r = sd_bus_message_append_basic(m, *t, &x); | |
1809 | break; | |
1810 | } | |
1811 | ||
1812 | case SD_BUS_TYPE_INT64: | |
1813 | case SD_BUS_TYPE_UINT64: | |
1814 | case SD_BUS_TYPE_DOUBLE: { | |
1815 | uint64_t x; | |
1816 | ||
1817 | x = va_arg(ap, uint64_t); | |
1818 | r = sd_bus_message_append_basic(m, *t, &x); | |
1819 | break; | |
1820 | } | |
1821 | ||
1822 | case SD_BUS_TYPE_STRING: | |
1823 | case SD_BUS_TYPE_OBJECT_PATH: | |
1824 | case SD_BUS_TYPE_SIGNATURE: { | |
1825 | const char *x; | |
1826 | ||
1827 | x = va_arg(ap, const char*); | |
1828 | r = sd_bus_message_append_basic(m, *t, x); | |
1829 | break; | |
1830 | } | |
1831 | ||
de1c301e | 1832 | case SD_BUS_TYPE_ARRAY: { |
de1c301e LP |
1833 | size_t k; |
1834 | ||
1835 | r = signature_element_length(t + 1, &k); | |
1836 | if (r < 0) | |
1837 | return r; | |
1838 | ||
1839 | { | |
1840 | char s[k + 1]; | |
de1c301e LP |
1841 | memcpy(s, t + 1, k); |
1842 | s[k] = 0; | |
de1c301e LP |
1843 | |
1844 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, s); | |
1845 | if (r < 0) | |
1846 | return r; | |
1b492614 | 1847 | } |
de1c301e | 1848 | |
1b492614 LP |
1849 | if (n_array == (unsigned) -1) { |
1850 | types += k; | |
1851 | n_struct -= k; | |
de1c301e LP |
1852 | } |
1853 | ||
1b492614 LP |
1854 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
1855 | if (r < 0) | |
1856 | return r; | |
1857 | ||
1858 | types = t + 1; | |
1859 | n_struct = k; | |
1860 | n_array = va_arg(ap, unsigned); | |
1861 | ||
de1c301e LP |
1862 | break; |
1863 | } | |
1864 | ||
1865 | case SD_BUS_TYPE_VARIANT: { | |
1866 | const char *s; | |
1867 | ||
1868 | s = va_arg(ap, const char*); | |
1869 | if (!s) | |
1870 | return -EINVAL; | |
1871 | ||
1872 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_VARIANT, s); | |
1873 | if (r < 0) | |
1874 | return r; | |
1875 | ||
1b492614 | 1876 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
de1c301e LP |
1877 | if (r < 0) |
1878 | return r; | |
1879 | ||
1b492614 LP |
1880 | types = s; |
1881 | n_struct = strlen(s); | |
1882 | n_array = (unsigned) -1; | |
1883 | ||
de1c301e LP |
1884 | break; |
1885 | } | |
1886 | ||
1887 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
1888 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
1889 | size_t k; | |
1890 | ||
1891 | r = signature_element_length(t, &k); | |
1892 | if (r < 0) | |
1893 | return r; | |
1894 | ||
1895 | { | |
1896 | char s[k - 1]; | |
1897 | ||
1898 | memcpy(s, t + 1, k - 2); | |
1899 | s[k - 2] = 0; | |
1900 | ||
1901 | r = sd_bus_message_open_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
1902 | if (r < 0) | |
1903 | return r; | |
1b492614 | 1904 | } |
de1c301e | 1905 | |
1b492614 LP |
1906 | if (n_array == (unsigned) -1) { |
1907 | types += k - 1; | |
1908 | n_struct -= k - 1; | |
1909 | } | |
de1c301e | 1910 | |
1b492614 LP |
1911 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
1912 | if (r < 0) | |
1913 | return r; | |
de1c301e | 1914 | |
1b492614 LP |
1915 | types = t + 1; |
1916 | n_struct = k - 2; | |
1917 | n_array = (unsigned) -1; | |
de1c301e LP |
1918 | |
1919 | break; | |
1920 | } | |
1921 | ||
1922 | default: | |
1923 | r = -EINVAL; | |
1924 | } | |
1925 | ||
1926 | if (r < 0) | |
1927 | return r; | |
1928 | } | |
1929 | ||
ebcf1f97 | 1930 | return 1; |
de1c301e LP |
1931 | } |
1932 | ||
d9f644e2 | 1933 | _public_ int sd_bus_message_append(sd_bus_message *m, const char *types, ...) { |
de1c301e LP |
1934 | va_list ap; |
1935 | int r; | |
1936 | ||
9d6c7c82 LP |
1937 | assert_return(m, -EINVAL); |
1938 | assert_return(types, -EINVAL); | |
1939 | assert_return(!m->sealed, -EPERM); | |
1940 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
1941 | |
1942 | va_start(ap, types); | |
917b5dc7 | 1943 | r = bus_message_append_ap(m, types, ap); |
de1c301e LP |
1944 | va_end(ap); |
1945 | ||
1946 | return r; | |
1947 | } | |
1948 | ||
d9f644e2 ZJS |
1949 | _public_ int sd_bus_message_append_array_space(sd_bus_message *m, |
1950 | char type, | |
1951 | size_t size, | |
1952 | void **ptr) { | |
b3af9646 LP |
1953 | ssize_t align, sz; |
1954 | void *a; | |
1955 | int r; | |
1956 | ||
9d6c7c82 LP |
1957 | assert_return(m, -EINVAL); |
1958 | assert_return(!m->sealed, -EPERM); | |
1959 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
1960 | assert_return(ptr || size == 0, -EINVAL); | |
1961 | assert_return(!m->poisoned, -ESTALE); | |
b3af9646 LP |
1962 | |
1963 | align = bus_type_get_alignment(type); | |
1964 | sz = bus_type_get_size(type); | |
1965 | ||
1966 | assert_se(align > 0); | |
1967 | assert_se(sz > 0); | |
1968 | ||
1969 | if (size % sz != 0) | |
1970 | return -EINVAL; | |
1971 | ||
1972 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
1973 | if (r < 0) | |
1974 | return r; | |
1975 | ||
1976 | a = message_extend_body(m, align, size); | |
bc7fd8cd LP |
1977 | if (!a) |
1978 | return -ENOMEM; | |
b3af9646 LP |
1979 | |
1980 | r = sd_bus_message_close_container(m); | |
1981 | if (r < 0) | |
bc7fd8cd | 1982 | return r; |
b3af9646 LP |
1983 | |
1984 | *ptr = a; | |
1985 | return 0; | |
b3af9646 LP |
1986 | } |
1987 | ||
d9f644e2 ZJS |
1988 | _public_ int sd_bus_message_append_array(sd_bus_message *m, |
1989 | char type, | |
1990 | const void *ptr, | |
1991 | size_t size) { | |
b3af9646 LP |
1992 | int r; |
1993 | void *p; | |
1994 | ||
9d6c7c82 LP |
1995 | assert_return(m, -EINVAL); |
1996 | assert_return(!m->sealed, -EPERM); | |
1997 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
1998 | assert_return(ptr || size == 0, -EINVAL); | |
1999 | assert_return(!m->poisoned, -ESTALE); | |
b3af9646 | 2000 | |
f8e013f8 | 2001 | r = sd_bus_message_append_array_space(m, type, size, &p); |
b3af9646 LP |
2002 | if (r < 0) |
2003 | return r; | |
2004 | ||
2005 | if (size > 0) | |
2006 | memcpy(p, ptr, size); | |
2007 | ||
2008 | return 0; | |
2009 | } | |
2010 | ||
938bcbab LP |
2011 | _public_ int sd_bus_message_append_array_iovec( |
2012 | sd_bus_message *m, | |
2013 | char type, | |
2014 | const struct iovec *iov, | |
2015 | unsigned n) { | |
2016 | ||
2017 | size_t size; | |
2018 | unsigned i; | |
2019 | void *p; | |
2020 | int r; | |
2021 | ||
2022 | assert_return(m, -EINVAL); | |
2023 | assert_return(!m->sealed, -EPERM); | |
2024 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
2025 | assert_return(iov || n == 0, -EINVAL); | |
2026 | assert_return(!m->poisoned, -ESTALE); | |
2027 | ||
2028 | size = IOVEC_TOTAL_SIZE(iov, n); | |
2029 | ||
2030 | r = sd_bus_message_append_array_space(m, type, size, &p); | |
2031 | if (r < 0) | |
2032 | return r; | |
2033 | ||
2034 | for (i = 0; i < n; i++) { | |
2035 | ||
2036 | if (iov[i].iov_base) | |
2037 | memcpy(p, iov[i].iov_base, iov[i].iov_len); | |
2038 | else | |
2039 | memset(p, 0, iov[i].iov_len); | |
2040 | ||
2041 | p = (uint8_t*) p + iov[i].iov_len; | |
2042 | } | |
2043 | ||
2044 | return 0; | |
2045 | } | |
2046 | ||
d9f644e2 ZJS |
2047 | _public_ int sd_bus_message_append_array_memfd(sd_bus_message *m, |
2048 | char type, | |
2049 | sd_memfd *memfd) { | |
453a0c29 LP |
2050 | _cleanup_close_ int copy_fd = -1; |
2051 | struct bus_body_part *part; | |
2052 | ssize_t align, sz; | |
2053 | uint64_t size; | |
2054 | void *a; | |
2055 | int r; | |
2056 | ||
2057 | if (!m) | |
2058 | return -EINVAL; | |
2059 | if (!memfd) | |
2060 | return -EINVAL; | |
2061 | if (m->sealed) | |
2062 | return -EPERM; | |
2063 | if (!bus_type_is_trivial(type)) | |
2064 | return -EINVAL; | |
2065 | if (m->poisoned) | |
2066 | return -ESTALE; | |
2067 | ||
2068 | r = sd_memfd_set_sealed(memfd, true); | |
2069 | if (r < 0) | |
2070 | return r; | |
2071 | ||
2072 | copy_fd = sd_memfd_dup_fd(memfd); | |
2073 | if (copy_fd < 0) | |
2074 | return copy_fd; | |
2075 | ||
2076 | r = sd_memfd_get_size(memfd, &size); | |
2077 | if (r < 0) | |
2078 | return r; | |
2079 | ||
2080 | align = bus_type_get_alignment(type); | |
2081 | sz = bus_type_get_size(type); | |
2082 | ||
2083 | assert_se(align > 0); | |
2084 | assert_se(sz > 0); | |
2085 | ||
2086 | if (size % sz != 0) | |
2087 | return -EINVAL; | |
2088 | ||
5cbe7492 | 2089 | if (size > (uint64_t) (uint32_t) -1) |
453a0c29 LP |
2090 | return -EINVAL; |
2091 | ||
2092 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
2093 | if (r < 0) | |
2094 | return r; | |
2095 | ||
2096 | a = message_extend_body(m, align, 0); | |
2097 | if (!a) | |
2098 | return -ENOMEM; | |
2099 | ||
2100 | part = message_append_part(m); | |
2101 | if (!part) | |
2102 | return -ENOMEM; | |
2103 | ||
2104 | part->memfd = copy_fd; | |
2105 | part->sealed = true; | |
2106 | part->size = size; | |
2107 | copy_fd = -1; | |
2108 | ||
2109 | message_extend_containers(m, size); | |
2110 | m->header->body_size += size; | |
2111 | ||
2112 | return sd_bus_message_close_container(m); | |
2113 | } | |
2114 | ||
d9f644e2 | 2115 | _public_ int sd_bus_message_append_string_memfd(sd_bus_message *m, sd_memfd *memfd) { |
5cbe7492 LP |
2116 | _cleanup_close_ int copy_fd = -1; |
2117 | struct bus_body_part *part; | |
2118 | struct bus_container *c; | |
2119 | uint64_t size; | |
2120 | void *a; | |
2121 | int r; | |
2122 | ||
55736ed0 LP |
2123 | assert_return(m, -EINVAL); |
2124 | assert_return(memfd, -EINVAL); | |
2125 | assert_return(!m->sealed, -EPERM); | |
2126 | assert_return(!m->poisoned, -ESTALE); | |
5cbe7492 LP |
2127 | |
2128 | r = sd_memfd_set_sealed(memfd, true); | |
2129 | if (r < 0) | |
2130 | return r; | |
2131 | ||
2132 | copy_fd = sd_memfd_dup_fd(memfd); | |
2133 | if (copy_fd < 0) | |
2134 | return copy_fd; | |
2135 | ||
2136 | r = sd_memfd_get_size(memfd, &size); | |
2137 | if (r < 0) | |
2138 | return r; | |
2139 | ||
2140 | /* We require this to be NUL terminated */ | |
2141 | if (size == 0) | |
2142 | return -EINVAL; | |
2143 | ||
2144 | if (size > (uint64_t) (uint32_t) -1) | |
2145 | return -EINVAL; | |
2146 | ||
2147 | c = message_get_container(m); | |
2148 | if (c->signature && c->signature[c->index]) { | |
2149 | /* Container signature is already set */ | |
2150 | ||
2151 | if (c->signature[c->index] != SD_BUS_TYPE_STRING) | |
2152 | return -ENXIO; | |
2153 | } else { | |
2154 | char *e; | |
2155 | ||
2156 | /* Maybe we can append to the signature? But only if this is the top-level container*/ | |
2157 | if (c->enclosing != 0) | |
2158 | return -ENXIO; | |
2159 | ||
2160 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL); | |
2161 | if (!e) { | |
2162 | m->poisoned = true; | |
2163 | return -ENOMEM; | |
2164 | } | |
2165 | } | |
2166 | ||
2167 | a = message_extend_body(m, 4, 4); | |
2168 | if (!a) | |
2169 | return -ENOMEM; | |
2170 | ||
2171 | *(uint32_t*) a = size - 1; | |
2172 | ||
2173 | part = message_append_part(m); | |
2174 | if (!part) | |
2175 | return -ENOMEM; | |
2176 | ||
2177 | part->memfd = copy_fd; | |
2178 | part->sealed = true; | |
2179 | part->size = size; | |
2180 | copy_fd = -1; | |
2181 | ||
2182 | message_extend_containers(m, size); | |
2183 | m->header->body_size += size; | |
2184 | ||
2185 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2186 | c->index++; | |
2187 | ||
2188 | return 0; | |
2189 | } | |
2190 | ||
d9f644e2 | 2191 | _public_ int sd_bus_message_append_strv(sd_bus_message *m, char **l) { |
55736ed0 LP |
2192 | char **i; |
2193 | int r; | |
2194 | ||
2195 | assert_return(m, -EINVAL); | |
2196 | assert_return(!m->sealed, -EPERM); | |
2197 | assert_return(!m->poisoned, -ESTALE); | |
2198 | ||
2199 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2200 | if (r < 0) | |
2201 | return r; | |
2202 | ||
2203 | STRV_FOREACH(i, l) { | |
2204 | r = sd_bus_message_append_basic(m, 's', *i); | |
2205 | if (r < 0) | |
2206 | return r; | |
2207 | } | |
2208 | ||
2209 | return sd_bus_message_close_container(m); | |
2210 | } | |
2211 | ||
a392d361 | 2212 | int bus_body_part_map(struct bus_body_part *part) { |
453a0c29 LP |
2213 | void *p; |
2214 | size_t psz; | |
2215 | ||
2216 | assert_se(part); | |
2217 | ||
2218 | if (part->data) | |
2219 | return 0; | |
2220 | ||
2221 | if (part->size <= 0) | |
2222 | return 0; | |
2223 | ||
1307c3ff LP |
2224 | /* For smaller zero parts (as used for padding) we don't need to map anything... */ |
2225 | if (part->memfd < 0 && part->is_zero && part->size < 8) { | |
2226 | static const uint8_t zeroes[7] = { }; | |
2227 | part->data = (void*) zeroes; | |
2228 | return 0; | |
2229 | } | |
2230 | ||
453a0c29 LP |
2231 | psz = PAGE_ALIGN(part->size); |
2232 | ||
2233 | if (part->memfd >= 0) | |
2234 | p = mmap(NULL, psz, PROT_READ, MAP_SHARED, part->memfd, 0); | |
2235 | else if (part->is_zero) | |
2236 | p = mmap(NULL, psz, PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
2237 | else | |
2238 | return -EINVAL; | |
2239 | ||
2240 | if (p == MAP_FAILED) | |
2241 | return -errno; | |
2242 | ||
2243 | part->mapped = psz; | |
2244 | part->data = p; | |
a392d361 LP |
2245 | part->munmap_this = true; |
2246 | ||
453a0c29 LP |
2247 | return 0; |
2248 | } | |
2249 | ||
a392d361 LP |
2250 | void bus_body_part_unmap(struct bus_body_part *part) { |
2251 | ||
2252 | assert_se(part); | |
2253 | ||
2254 | if (part->memfd < 0) | |
2255 | return; | |
2256 | ||
a392d361 LP |
2257 | if (!part->data) |
2258 | return; | |
2259 | ||
bf30e48f KS |
2260 | if (!part->munmap_this) |
2261 | return; | |
a392d361 LP |
2262 | |
2263 | assert_se(munmap(part->data, part->mapped) == 0); | |
2264 | ||
2265 | part->data = NULL; | |
2266 | part->mapped = 0; | |
2267 | part->munmap_this = false; | |
2268 | ||
2269 | return; | |
2270 | } | |
2271 | ||
9a17484d | 2272 | static int buffer_peek(const void *p, uint32_t sz, size_t *rindex, size_t align, size_t nbytes, void **r) { |
bc7fd8cd | 2273 | size_t k, start, end; |
de1c301e | 2274 | |
9a17484d LP |
2275 | assert(rindex); |
2276 | assert(align > 0); | |
de1c301e | 2277 | |
9a17484d | 2278 | start = ALIGN_TO((size_t) *rindex, align); |
bc7fd8cd | 2279 | end = start + nbytes; |
9a17484d | 2280 | |
bc7fd8cd | 2281 | if (end > sz) |
9a17484d LP |
2282 | return -EBADMSG; |
2283 | ||
2284 | /* Verify that padding is 0 */ | |
2285 | for (k = *rindex; k < start; k++) | |
2286 | if (((const uint8_t*) p)[k] != 0) | |
2287 | return -EBADMSG; | |
2288 | ||
2289 | if (r) | |
2290 | *r = (uint8_t*) p + start; | |
2291 | ||
bc7fd8cd | 2292 | *rindex = end; |
9a17484d LP |
2293 | |
2294 | return 1; | |
de1c301e LP |
2295 | } |
2296 | ||
7b058942 LP |
2297 | static bool message_end_of_signature(sd_bus_message *m) { |
2298 | struct bus_container *c; | |
2299 | ||
2300 | assert(m); | |
2301 | ||
2302 | c = message_get_container(m); | |
2303 | return !c->signature || c->signature[c->index] == 0; | |
2304 | } | |
2305 | ||
9a17484d LP |
2306 | static bool message_end_of_array(sd_bus_message *m, size_t index) { |
2307 | struct bus_container *c; | |
de1c301e | 2308 | |
9a17484d | 2309 | assert(m); |
de1c301e | 2310 | |
9a17484d LP |
2311 | c = message_get_container(m); |
2312 | if (!c->array_size) | |
2313 | return false; | |
de1c301e | 2314 | |
9a17484d | 2315 | return index >= c->begin + BUS_MESSAGE_BSWAP32(m, *c->array_size); |
de1c301e LP |
2316 | } |
2317 | ||
1405bef3 | 2318 | _public_ int sd_bus_message_at_end(sd_bus_message *m, int complete) { |
7b058942 LP |
2319 | assert_return(m, -EINVAL); |
2320 | assert_return(m->sealed, -EPERM); | |
2321 | ||
2322 | if (complete && m->n_containers > 0) | |
2323 | return false; | |
2324 | ||
2325 | if (message_end_of_signature(m)) | |
2326 | return true; | |
2327 | ||
2328 | if (message_end_of_array(m, m->rindex)) | |
2329 | return true; | |
2330 | ||
2331 | return false; | |
2332 | } | |
2333 | ||
bc7fd8cd LP |
2334 | static struct bus_body_part* find_part(sd_bus_message *m, size_t index, size_t sz, void **p) { |
2335 | struct bus_body_part *part; | |
2336 | size_t begin; | |
453a0c29 LP |
2337 | int r; |
2338 | ||
bc7fd8cd LP |
2339 | assert(m); |
2340 | ||
2341 | if (m->cached_rindex_part && index >= m->cached_rindex_part_begin) { | |
2342 | part = m->cached_rindex_part; | |
2343 | begin = m->cached_rindex_part_begin; | |
2344 | } else { | |
2345 | part = &m->body; | |
2346 | begin = 0; | |
2347 | } | |
2348 | ||
2349 | while (part) { | |
2350 | if (index < begin) | |
2351 | return NULL; | |
2352 | ||
2353 | if (index + sz <= begin + part->size) { | |
453a0c29 | 2354 | |
a392d361 | 2355 | r = bus_body_part_map(part); |
453a0c29 LP |
2356 | if (r < 0) |
2357 | return NULL; | |
2358 | ||
bc7fd8cd | 2359 | if (p) |
453a0c29 | 2360 | *p = (uint8_t*) part->data + index - begin; |
bc7fd8cd LP |
2361 | |
2362 | m->cached_rindex_part = part; | |
2363 | m->cached_rindex_part_begin = begin; | |
2364 | ||
2365 | return part; | |
2366 | } | |
2367 | ||
453a0c29 | 2368 | begin += part->size; |
bc7fd8cd LP |
2369 | part = part->next; |
2370 | } | |
2371 | ||
2372 | return NULL; | |
2373 | } | |
2374 | ||
2375 | static int message_peek_body( | |
2376 | sd_bus_message *m, | |
2377 | size_t *rindex, | |
2378 | size_t align, | |
2379 | size_t nbytes, | |
2380 | void **ret) { | |
2381 | ||
2382 | size_t k, start, end, padding; | |
2383 | struct bus_body_part *part; | |
2384 | uint8_t *q; | |
2385 | ||
de1c301e | 2386 | assert(m); |
9a17484d LP |
2387 | assert(rindex); |
2388 | assert(align > 0); | |
de1c301e | 2389 | |
9a17484d LP |
2390 | if (message_end_of_array(m, *rindex)) |
2391 | return 0; | |
de1c301e | 2392 | |
bc7fd8cd LP |
2393 | start = ALIGN_TO((size_t) *rindex, align); |
2394 | padding = start - *rindex; | |
2395 | end = start + nbytes; | |
2396 | ||
2397 | if (end > BUS_MESSAGE_BODY_SIZE(m)) | |
2398 | return -EBADMSG; | |
2399 | ||
2400 | part = find_part(m, *rindex, padding, (void**) &q); | |
2401 | if (!part) | |
2402 | return -EBADMSG; | |
2403 | ||
2404 | if (q) { | |
2405 | /* Verify padding */ | |
2406 | for (k = 0; k < padding; k++) | |
2407 | if (q[k] != 0) | |
2408 | return -EBADMSG; | |
2409 | } | |
2410 | ||
2411 | part = find_part(m, start, nbytes, (void**) &q); | |
2412 | if (!part || !q) | |
2413 | return -EBADMSG; | |
2414 | ||
2415 | *rindex = end; | |
2416 | ||
2417 | if (ret) | |
2418 | *ret = q; | |
2419 | ||
2420 | return 1; | |
9a17484d | 2421 | } |
de1c301e | 2422 | |
ac89bf1d | 2423 | static bool validate_nul(const char *s, size_t l) { |
de1c301e | 2424 | |
9a17484d LP |
2425 | /* Check for NUL chars in the string */ |
2426 | if (memchr(s, 0, l)) | |
2427 | return false; | |
de1c301e | 2428 | |
9a17484d LP |
2429 | /* Check for NUL termination */ |
2430 | if (s[l] != 0) | |
2431 | return false; | |
de1c301e | 2432 | |
ac89bf1d LP |
2433 | return true; |
2434 | } | |
2435 | ||
2436 | static bool validate_string(const char *s, size_t l) { | |
2437 | ||
2438 | if (!validate_nul(s, l)) | |
2439 | return false; | |
2440 | ||
9a17484d LP |
2441 | /* Check if valid UTF8 */ |
2442 | if (!utf8_is_valid(s)) | |
2443 | return false; | |
2444 | ||
2445 | return true; | |
de1c301e LP |
2446 | } |
2447 | ||
9a17484d | 2448 | static bool validate_signature(const char *s, size_t l) { |
de1c301e | 2449 | |
ac89bf1d | 2450 | if (!validate_nul(s, l)) |
9a17484d | 2451 | return false; |
de1c301e | 2452 | |
9a17484d LP |
2453 | /* Check if valid signature */ |
2454 | if (!signature_is_valid(s, true)) | |
2455 | return false; | |
2456 | ||
2457 | return true; | |
2458 | } | |
2459 | ||
ac89bf1d LP |
2460 | static bool validate_object_path(const char *s, size_t l) { |
2461 | ||
2462 | if (!validate_nul(s, l)) | |
2463 | return false; | |
2464 | ||
2465 | if (!object_path_is_valid(s)) | |
2466 | return false; | |
2467 | ||
2468 | return true; | |
2469 | } | |
2470 | ||
d9f644e2 | 2471 | _public_ int sd_bus_message_read_basic(sd_bus_message *m, char type, void *p) { |
9a17484d | 2472 | struct bus_container *c; |
9a17484d | 2473 | void *q; |
0dcd14b9 | 2474 | int r; |
9a17484d | 2475 | |
9d6c7c82 LP |
2476 | assert_return(m, -EINVAL); |
2477 | assert_return(m->sealed, -EPERM); | |
2478 | assert_return(bus_type_is_basic(type), -EINVAL); | |
de1c301e | 2479 | |
7b058942 | 2480 | if (message_end_of_signature(m)) |
430fb8fa | 2481 | return -ENXIO; |
9a17484d | 2482 | |
1daf8121 LP |
2483 | if (message_end_of_array(m, m->rindex)) |
2484 | return 0; | |
2485 | ||
7b058942 | 2486 | c = message_get_container(m); |
9a17484d LP |
2487 | if (c->signature[c->index] != type) |
2488 | return -ENXIO; | |
2489 | ||
2490 | switch (type) { | |
2491 | ||
2492 | case SD_BUS_TYPE_STRING: | |
2493 | case SD_BUS_TYPE_OBJECT_PATH: { | |
2494 | uint32_t l; | |
2495 | size_t rindex; | |
2496 | ||
2497 | rindex = m->rindex; | |
2498 | r = message_peek_body(m, &rindex, 4, 4, &q); | |
2499 | if (r <= 0) | |
2500 | return r; | |
2501 | ||
2502 | l = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
2503 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
de1c301e LP |
2504 | if (r < 0) |
2505 | return r; | |
9a17484d LP |
2506 | if (r == 0) |
2507 | return -EBADMSG; | |
2508 | ||
ac89bf1d LP |
2509 | if (type == SD_BUS_TYPE_OBJECT_PATH) { |
2510 | if (!validate_object_path(q, l)) | |
2511 | return -EBADMSG; | |
2512 | } else { | |
2513 | if (!validate_string(q, l)) | |
2514 | return -EBADMSG; | |
2515 | } | |
9a17484d LP |
2516 | |
2517 | m->rindex = rindex; | |
0dcd14b9 LP |
2518 | if (p) |
2519 | *(const char**) p = q; | |
2520 | ||
9a17484d | 2521 | break; |
de1c301e LP |
2522 | } |
2523 | ||
9a17484d LP |
2524 | case SD_BUS_TYPE_SIGNATURE: { |
2525 | uint8_t l; | |
2526 | size_t rindex; | |
2527 | ||
2528 | rindex = m->rindex; | |
2529 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
2530 | if (r <= 0) | |
2531 | return r; | |
2532 | ||
2533 | l = *(uint8_t*) q; | |
2534 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
de1c301e LP |
2535 | if (r < 0) |
2536 | return r; | |
9a17484d LP |
2537 | if (r == 0) |
2538 | return -EBADMSG; | |
2539 | ||
2540 | if (!validate_signature(q, l)) | |
2541 | return -EBADMSG; | |
2542 | ||
2543 | m->rindex = rindex; | |
0dcd14b9 LP |
2544 | |
2545 | if (p) | |
2546 | *(const char**) p = q; | |
9a17484d | 2547 | break; |
de1c301e LP |
2548 | } |
2549 | ||
9a17484d | 2550 | default: { |
27f6e5c7 ZJS |
2551 | ssize_t sz, align; |
2552 | size_t rindex; | |
de1c301e | 2553 | |
9a17484d LP |
2554 | align = bus_type_get_alignment(type); |
2555 | sz = bus_type_get_size(type); | |
27f6e5c7 | 2556 | assert(align > 0 && sz > 0); |
de1c301e | 2557 | |
2c93b4ef LP |
2558 | rindex = m->rindex; |
2559 | r = message_peek_body(m, &rindex, align, sz, &q); | |
9a17484d LP |
2560 | if (r <= 0) |
2561 | return r; | |
2562 | ||
2563 | switch (type) { | |
2564 | ||
2565 | case SD_BUS_TYPE_BYTE: | |
0dcd14b9 LP |
2566 | if (p) |
2567 | *(uint8_t*) p = *(uint8_t*) q; | |
9a17484d LP |
2568 | break; |
2569 | ||
2570 | case SD_BUS_TYPE_BOOLEAN: | |
0dcd14b9 | 2571 | if (p) |
102d8f81 | 2572 | *(int*) p = !!*(uint32_t*) q; |
9a17484d LP |
2573 | break; |
2574 | ||
2575 | case SD_BUS_TYPE_INT16: | |
2576 | case SD_BUS_TYPE_UINT16: | |
0dcd14b9 LP |
2577 | if (p) |
2578 | *(uint16_t*) p = BUS_MESSAGE_BSWAP16(m, *(uint16_t*) q); | |
9a17484d LP |
2579 | break; |
2580 | ||
2581 | case SD_BUS_TYPE_INT32: | |
2582 | case SD_BUS_TYPE_UINT32: | |
0dcd14b9 LP |
2583 | if (p) |
2584 | *(uint32_t*) p = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
9a17484d LP |
2585 | break; |
2586 | ||
2587 | case SD_BUS_TYPE_INT64: | |
2588 | case SD_BUS_TYPE_UINT64: | |
2589 | case SD_BUS_TYPE_DOUBLE: | |
0dcd14b9 LP |
2590 | if (p) |
2591 | *(uint64_t*) p = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q); | |
9a17484d LP |
2592 | break; |
2593 | ||
2c93b4ef | 2594 | case SD_BUS_TYPE_UNIX_FD: { |
2c93b4ef LP |
2595 | uint32_t j; |
2596 | ||
2597 | j = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
2598 | if (j >= m->n_fds) | |
2599 | return -EBADMSG; | |
2600 | ||
0dcd14b9 LP |
2601 | if (p) |
2602 | *(int*) p = m->fds[j]; | |
2c93b4ef LP |
2603 | break; |
2604 | } | |
2605 | ||
9a17484d LP |
2606 | default: |
2607 | assert_not_reached("Unknown basic type..."); | |
2608 | } | |
2609 | ||
b3af9646 | 2610 | m->rindex = rindex; |
2c93b4ef | 2611 | |
9a17484d LP |
2612 | break; |
2613 | } | |
2614 | } | |
2615 | ||
2616 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2617 | c->index++; | |
2618 | ||
2619 | return 1; | |
de1c301e LP |
2620 | } |
2621 | ||
9a17484d LP |
2622 | static int bus_message_enter_array( |
2623 | sd_bus_message *m, | |
2624 | struct bus_container *c, | |
2625 | const char *contents, | |
2626 | uint32_t **array_size) { | |
2627 | ||
2628 | size_t rindex; | |
2629 | void *q; | |
2630 | int r, alignment; | |
2631 | ||
2632 | assert(m); | |
2633 | assert(c); | |
2634 | assert(contents); | |
2635 | assert(array_size); | |
2636 | ||
29ddb38f | 2637 | if (!signature_is_single(contents, true)) |
de1c301e | 2638 | return -EINVAL; |
9a17484d LP |
2639 | |
2640 | alignment = bus_type_get_alignment(contents[0]); | |
2641 | if (alignment < 0) | |
2642 | return alignment; | |
2643 | ||
2644 | if (!c->signature || c->signature[c->index] == 0) | |
2645 | return 0; | |
2646 | ||
2647 | if (c->signature[c->index] != SD_BUS_TYPE_ARRAY) | |
2648 | return -ENXIO; | |
2649 | ||
2650 | if (!startswith(c->signature + c->index + 1, contents)) | |
2651 | return -ENXIO; | |
2652 | ||
2653 | rindex = m->rindex; | |
2654 | r = message_peek_body(m, &rindex, 4, 4, &q); | |
2655 | if (r <= 0) | |
2656 | return r; | |
2657 | ||
ac89bf1d | 2658 | if (BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q) > BUS_ARRAY_MAX_SIZE) |
80a46c73 | 2659 | return -EBADMSG; |
9a17484d LP |
2660 | |
2661 | r = message_peek_body(m, &rindex, alignment, 0, NULL); | |
2662 | if (r < 0) | |
2663 | return r; | |
2664 | if (r == 0) | |
2665 | return -EBADMSG; | |
2666 | ||
2667 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2668 | c->index += 1 + strlen(contents); | |
2669 | ||
2670 | m->rindex = rindex; | |
2671 | ||
2672 | *array_size = (uint32_t*) q; | |
2673 | ||
2674 | return 1; | |
2675 | } | |
2676 | ||
2677 | static int bus_message_enter_variant( | |
2678 | sd_bus_message *m, | |
2679 | struct bus_container *c, | |
2680 | const char *contents) { | |
2681 | ||
2682 | size_t rindex; | |
2683 | uint8_t l; | |
2684 | void *q; | |
2685 | int r; | |
2686 | ||
2687 | assert(m); | |
2688 | assert(c); | |
2689 | assert(contents); | |
2690 | ||
29ddb38f | 2691 | if (!signature_is_single(contents, false)) |
de1c301e | 2692 | return -EINVAL; |
de1c301e | 2693 | |
9a17484d LP |
2694 | if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN) |
2695 | return -EINVAL; | |
2696 | ||
2697 | if (!c->signature || c->signature[c->index] == 0) | |
2698 | return 0; | |
2699 | ||
2700 | if (c->signature[c->index] != SD_BUS_TYPE_VARIANT) | |
2701 | return -ENXIO; | |
2702 | ||
2703 | rindex = m->rindex; | |
2704 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
2705 | if (r <= 0) | |
2706 | return r; | |
2707 | ||
2708 | l = *(uint8_t*) q; | |
2709 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
2710 | if (r < 0) | |
2711 | return r; | |
2712 | if (r == 0) | |
2713 | return -EBADMSG; | |
2714 | ||
2715 | if (!validate_signature(q, l)) | |
2716 | return -EBADMSG; | |
2717 | ||
2718 | if (!streq(q, contents)) | |
2719 | return -ENXIO; | |
2720 | ||
2721 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2722 | c->index++; | |
2723 | ||
2724 | m->rindex = rindex; | |
2725 | ||
2726 | return 1; | |
de1c301e LP |
2727 | } |
2728 | ||
9a17484d LP |
2729 | static int bus_message_enter_struct( |
2730 | sd_bus_message *m, | |
2731 | struct bus_container *c, | |
2732 | const char *contents) { | |
2733 | ||
2734 | size_t l; | |
2735 | int r; | |
2736 | ||
2737 | assert(m); | |
2738 | assert(c); | |
2739 | assert(contents); | |
2740 | ||
2741 | if (!signature_is_valid(contents, false)) | |
2742 | return -EINVAL; | |
2743 | ||
2744 | if (!c->signature || c->signature[c->index] == 0) | |
2745 | return 0; | |
2746 | ||
2747 | l = strlen(contents); | |
2748 | ||
2749 | if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN || | |
2750 | !startswith(c->signature + c->index + 1, contents) || | |
2751 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END) | |
2752 | return -ENXIO; | |
2753 | ||
2754 | r = message_peek_body(m, &m->rindex, 8, 0, NULL); | |
2755 | if (r <= 0) | |
2756 | return r; | |
2757 | ||
2758 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2759 | c->index += 1 + l + 1; | |
2760 | ||
2761 | return 1; | |
2762 | } | |
2763 | ||
2764 | static int bus_message_enter_dict_entry( | |
2765 | sd_bus_message *m, | |
2766 | struct bus_container *c, | |
2767 | const char *contents) { | |
2768 | ||
2769 | size_t l; | |
2770 | int r; | |
2771 | ||
2772 | assert(m); | |
2773 | assert(c); | |
2774 | assert(contents); | |
2775 | ||
2776 | if (!signature_is_pair(contents)) | |
2777 | return -EINVAL; | |
2778 | ||
2779 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2780 | return -ENXIO; | |
2781 | ||
2782 | if (!c->signature || c->signature[c->index] == 0) | |
2783 | return 0; | |
2784 | ||
2785 | l = strlen(contents); | |
2786 | ||
2787 | if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN || | |
2788 | !startswith(c->signature + c->index + 1, contents) || | |
2789 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END) | |
2790 | return -ENXIO; | |
2791 | ||
2792 | r = message_peek_body(m, &m->rindex, 8, 0, NULL); | |
2793 | if (r <= 0) | |
2794 | return r; | |
2795 | ||
2796 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2797 | c->index += 1 + l + 1; | |
2798 | ||
2799 | return 1; | |
2800 | } | |
2801 | ||
d9f644e2 ZJS |
2802 | _public_ int sd_bus_message_enter_container(sd_bus_message *m, |
2803 | char type, | |
2804 | const char *contents) { | |
9a17484d LP |
2805 | struct bus_container *c, *w; |
2806 | uint32_t *array_size = NULL; | |
2807 | char *signature; | |
b3af9646 | 2808 | size_t before; |
9a17484d LP |
2809 | int r; |
2810 | ||
275b39fe LP |
2811 | assert_return(m, -EINVAL); |
2812 | assert_return(m->sealed, -EPERM); | |
2813 | assert_return(type != 0 || !contents, -EINVAL); | |
2814 | ||
2815 | if (type == 0 || !contents) { | |
2816 | const char *cc; | |
2817 | char tt; | |
2818 | ||
2819 | /* Allow entering into anonymous containers */ | |
2820 | r = sd_bus_message_peek_type(m, &tt, &cc); | |
2821 | if (r <= 0) | |
2822 | return r; | |
2823 | ||
2824 | if (type != 0 && type != tt) | |
2825 | return -ENXIO; | |
2826 | ||
2827 | if (contents && !streq(contents, cc)) | |
2828 | return -ENXIO; | |
2829 | ||
2830 | type = tt; | |
2831 | contents = cc; | |
2832 | } | |
9a17484d | 2833 | |
ed205a6b LP |
2834 | /* |
2835 | * We enforce a global limit on container depth, that is much | |
2836 | * higher than the 32 structs and 32 arrays the specification | |
2837 | * mandates. This is simpler to implement for us, and we need | |
2838 | * this only to ensure our container array doesn't grow | |
2839 | * without bounds. We are happy to return any data from a | |
2840 | * message as long as the data itself is valid, even if the | |
2841 | * overall message might be not. | |
2842 | * | |
2843 | * Note that the message signature is validated when | |
2844 | * parsing the headers, and that validation does check the | |
2845 | * 32/32 limit. | |
2846 | * | |
2847 | * Note that the specification defines no limits on the depth | |
2848 | * of stacked variants, but we do. | |
2849 | */ | |
2850 | if (m->n_containers >= BUS_CONTAINER_DEPTH) | |
2851 | return -EBADMSG; | |
2852 | ||
9a17484d LP |
2853 | w = realloc(m->containers, sizeof(struct bus_container) * (m->n_containers + 1)); |
2854 | if (!w) | |
2855 | return -ENOMEM; | |
2856 | m->containers = w; | |
2857 | ||
7b058942 | 2858 | if (message_end_of_signature(m)) |
430fb8fa | 2859 | return -ENXIO; |
9a17484d | 2860 | |
1daf8121 LP |
2861 | if (message_end_of_array(m, m->rindex)) |
2862 | return 0; | |
2863 | ||
7b058942 LP |
2864 | c = message_get_container(m); |
2865 | ||
9a17484d LP |
2866 | signature = strdup(contents); |
2867 | if (!signature) | |
2868 | return -ENOMEM; | |
2869 | ||
b3af9646 LP |
2870 | c->saved_index = c->index; |
2871 | before = m->rindex; | |
2872 | ||
9a17484d LP |
2873 | if (type == SD_BUS_TYPE_ARRAY) |
2874 | r = bus_message_enter_array(m, c, contents, &array_size); | |
2875 | else if (type == SD_BUS_TYPE_VARIANT) | |
2876 | r = bus_message_enter_variant(m, c, contents); | |
2877 | else if (type == SD_BUS_TYPE_STRUCT) | |
2878 | r = bus_message_enter_struct(m, c, contents); | |
2879 | else if (type == SD_BUS_TYPE_DICT_ENTRY) | |
2880 | r = bus_message_enter_dict_entry(m, c, contents); | |
2881 | else | |
2882 | r = -EINVAL; | |
2883 | ||
2884 | if (r <= 0) { | |
2885 | free(signature); | |
2886 | return r; | |
2887 | } | |
2888 | ||
2889 | /* OK, let's fill it in */ | |
2890 | w += m->n_containers++; | |
2891 | w->enclosing = type; | |
2892 | w->signature = signature; | |
2893 | w->index = 0; | |
2894 | w->array_size = array_size; | |
b3af9646 | 2895 | w->before = before; |
9a17484d LP |
2896 | w->begin = m->rindex; |
2897 | ||
2898 | return 1; | |
2899 | } | |
2900 | ||
d9f644e2 | 2901 | _public_ int sd_bus_message_exit_container(sd_bus_message *m) { |
9a17484d LP |
2902 | struct bus_container *c; |
2903 | ||
9d6c7c82 LP |
2904 | assert_return(m, -EINVAL); |
2905 | assert_return(m->sealed, -EPERM); | |
f959af20 | 2906 | assert_return(m->n_containers > 0, -ENXIO); |
9a17484d LP |
2907 | |
2908 | c = message_get_container(m); | |
2909 | if (c->enclosing == SD_BUS_TYPE_ARRAY) { | |
2910 | uint32_t l; | |
2911 | ||
2912 | l = BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
2913 | if (c->begin + l != m->rindex) | |
2914 | return -EBUSY; | |
2915 | ||
2916 | } else { | |
2917 | if (c->signature && c->signature[c->index] != 0) | |
f959af20 | 2918 | return -EBUSY; |
9a17484d LP |
2919 | } |
2920 | ||
2921 | free(c->signature); | |
2922 | m->n_containers--; | |
2923 | ||
2924 | return 1; | |
2925 | } | |
2926 | ||
b3af9646 LP |
2927 | static void message_quit_container(sd_bus_message *m) { |
2928 | struct bus_container *c; | |
2929 | ||
2930 | assert(m); | |
2931 | assert(m->sealed); | |
2932 | assert(m->n_containers > 0); | |
2933 | ||
2934 | c = message_get_container(m); | |
2935 | ||
2936 | /* Undo seeks */ | |
2937 | assert(m->rindex >= c->before); | |
2938 | m->rindex = c->before; | |
2939 | ||
2940 | /* Free container */ | |
2941 | free(c->signature); | |
2942 | m->n_containers--; | |
2943 | ||
2944 | /* Correct index of new top-level container */ | |
2945 | c = message_get_container(m); | |
2946 | c->index = c->saved_index; | |
2947 | } | |
2948 | ||
d9f644e2 | 2949 | _public_ int sd_bus_message_peek_type(sd_bus_message *m, char *type, const char **contents) { |
9a17484d LP |
2950 | struct bus_container *c; |
2951 | int r; | |
2952 | ||
c430fee6 LP |
2953 | assert_return(m, -EINVAL); |
2954 | assert_return(m->sealed, -EPERM); | |
9a17484d | 2955 | |
7b058942 | 2956 | if (message_end_of_signature(m)) |
9a17484d LP |
2957 | goto eof; |
2958 | ||
2959 | if (message_end_of_array(m, m->rindex)) | |
2960 | goto eof; | |
2961 | ||
7b058942 LP |
2962 | c = message_get_container(m); |
2963 | ||
9a17484d LP |
2964 | if (bus_type_is_basic(c->signature[c->index])) { |
2965 | if (contents) | |
2966 | *contents = NULL; | |
2967 | if (type) | |
2968 | *type = c->signature[c->index]; | |
2969 | return 1; | |
2970 | } | |
2971 | ||
2972 | if (c->signature[c->index] == SD_BUS_TYPE_ARRAY) { | |
2973 | ||
2974 | if (contents) { | |
2975 | size_t l; | |
2976 | char *sig; | |
2977 | ||
2978 | r = signature_element_length(c->signature+c->index+1, &l); | |
2979 | if (r < 0) | |
2980 | return r; | |
2981 | ||
80a46c73 LP |
2982 | assert(l >= 1); |
2983 | ||
9a17484d LP |
2984 | sig = strndup(c->signature + c->index + 1, l); |
2985 | if (!sig) | |
2986 | return -ENOMEM; | |
2987 | ||
2988 | free(m->peeked_signature); | |
2989 | m->peeked_signature = sig; | |
2990 | ||
2991 | *contents = sig; | |
2992 | } | |
2993 | ||
2994 | if (type) | |
2995 | *type = SD_BUS_TYPE_ARRAY; | |
2996 | ||
2997 | return 1; | |
2998 | } | |
2999 | ||
3000 | if (c->signature[c->index] == SD_BUS_TYPE_STRUCT_BEGIN || | |
3001 | c->signature[c->index] == SD_BUS_TYPE_DICT_ENTRY_BEGIN) { | |
3002 | ||
3003 | if (contents) { | |
3004 | size_t l; | |
3005 | char *sig; | |
3006 | ||
3007 | r = signature_element_length(c->signature+c->index, &l); | |
3008 | if (r < 0) | |
3009 | return r; | |
3010 | ||
3011 | assert(l >= 2); | |
3012 | sig = strndup(c->signature + c->index + 1, l - 2); | |
3013 | if (!sig) | |
3014 | return -ENOMEM; | |
3015 | ||
3016 | free(m->peeked_signature); | |
3017 | m->peeked_signature = sig; | |
3018 | ||
3019 | *contents = sig; | |
3020 | } | |
3021 | ||
3022 | if (type) | |
3023 | *type = c->signature[c->index] == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY; | |
3024 | ||
3025 | return 1; | |
3026 | } | |
3027 | ||
3028 | if (c->signature[c->index] == SD_BUS_TYPE_VARIANT) { | |
3029 | if (contents) { | |
3030 | size_t rindex, l; | |
3031 | void *q; | |
3032 | ||
3033 | rindex = m->rindex; | |
3034 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
3035 | if (r < 0) | |
3036 | return r; | |
3037 | if (r == 0) | |
3038 | goto eof; | |
3039 | ||
3040 | l = *(uint8_t*) q; | |
3041 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
3042 | if (r < 0) | |
3043 | return r; | |
3044 | if (r == 0) | |
3045 | return -EBADMSG; | |
3046 | ||
3047 | if (!validate_signature(q, l)) | |
3048 | return -EBADMSG; | |
3049 | ||
3050 | *contents = q; | |
3051 | } | |
3052 | ||
3053 | if (type) | |
3054 | *type = SD_BUS_TYPE_VARIANT; | |
3055 | ||
3056 | return 1; | |
3057 | } | |
3058 | ||
3059 | return -EINVAL; | |
3060 | ||
3061 | eof: | |
3062 | if (type) | |
7b058942 | 3063 | *type = 0; |
9a17484d LP |
3064 | if (contents) |
3065 | *contents = NULL; | |
3066 | return 0; | |
3067 | } | |
3068 | ||
d9f644e2 | 3069 | _public_ int sd_bus_message_rewind(sd_bus_message *m, int complete) { |
9a17484d LP |
3070 | struct bus_container *c; |
3071 | ||
9d6c7c82 LP |
3072 | assert_return(m, -EINVAL); |
3073 | assert_return(m->sealed, -EPERM); | |
9a17484d LP |
3074 | |
3075 | if (complete) { | |
bc7fd8cd | 3076 | message_reset_containers(m); |
9a17484d LP |
3077 | m->rindex = 0; |
3078 | m->root_container.index = 0; | |
3079 | ||
3080 | c = message_get_container(m); | |
3081 | } else { | |
3082 | c = message_get_container(m); | |
3083 | ||
3084 | c->index = 0; | |
3085 | m->rindex = c->begin; | |
3086 | } | |
3087 | ||
3088 | return !isempty(c->signature); | |
3089 | } | |
718db961 | 3090 | |
1b492614 LP |
3091 | static int message_read_ap( |
3092 | sd_bus_message *m, | |
3093 | const char *types, | |
3094 | va_list ap) { | |
9a17484d | 3095 | |
fe1d424d LP |
3096 | unsigned n_array, n_struct; |
3097 | TypeStack stack[BUS_CONTAINER_DEPTH]; | |
3098 | unsigned stack_ptr = 0; | |
430fb8fa | 3099 | unsigned n_loop = 0; |
9a17484d LP |
3100 | int r; |
3101 | ||
3102 | assert(m); | |
1b492614 | 3103 | |
430fb8fa | 3104 | if (isempty(types)) |
1b492614 | 3105 | return 0; |
9a17484d | 3106 | |
fe1d424d LP |
3107 | /* Ideally, we'd just call ourselves recursively on every |
3108 | * complex type. However, the state of a va_list that is | |
3109 | * passed to a function is undefined after that function | |
3110 | * returns. This means we need to docode the va_list linearly | |
3111 | * in a single stackframe. We hence implement our own | |
3112 | * home-grown stack in an array. */ | |
3113 | ||
430fb8fa LP |
3114 | n_array = (unsigned) -1; /* lenght of current array entries */ |
3115 | n_struct = strlen(types); /* length of current struct contents signature */ | |
fe1d424d LP |
3116 | |
3117 | for (;;) { | |
3118 | const char *t; | |
3119 | ||
430fb8fa LP |
3120 | n_loop++; |
3121 | ||
1b492614 | 3122 | if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) { |
fe1d424d LP |
3123 | r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array); |
3124 | if (r < 0) | |
3125 | return r; | |
3126 | if (r == 0) | |
3127 | break; | |
3128 | ||
3129 | r = sd_bus_message_exit_container(m); | |
3130 | if (r < 0) | |
3131 | return r; | |
3132 | ||
3133 | continue; | |
3134 | } | |
3135 | ||
3136 | t = types; | |
3137 | if (n_array != (unsigned) -1) | |
3138 | n_array --; | |
3139 | else { | |
3140 | types ++; | |
3141 | n_struct--; | |
3142 | } | |
3143 | ||
9a17484d LP |
3144 | switch (*t) { |
3145 | ||
3146 | case SD_BUS_TYPE_BYTE: | |
3147 | case SD_BUS_TYPE_BOOLEAN: | |
3148 | case SD_BUS_TYPE_INT16: | |
3149 | case SD_BUS_TYPE_UINT16: | |
3150 | case SD_BUS_TYPE_INT32: | |
3151 | case SD_BUS_TYPE_UINT32: | |
3152 | case SD_BUS_TYPE_INT64: | |
3153 | case SD_BUS_TYPE_UINT64: | |
3154 | case SD_BUS_TYPE_DOUBLE: | |
3155 | case SD_BUS_TYPE_STRING: | |
3156 | case SD_BUS_TYPE_OBJECT_PATH: | |
2c93b4ef LP |
3157 | case SD_BUS_TYPE_SIGNATURE: |
3158 | case SD_BUS_TYPE_UNIX_FD: { | |
9a17484d LP |
3159 | void *p; |
3160 | ||
3161 | p = va_arg(ap, void*); | |
3162 | r = sd_bus_message_read_basic(m, *t, p); | |
fe1d424d LP |
3163 | if (r < 0) |
3164 | return r; | |
430fb8fa LP |
3165 | if (r == 0) { |
3166 | if (n_loop <= 1) | |
3167 | return 0; | |
3168 | ||
fe1d424d | 3169 | return -ENXIO; |
430fb8fa | 3170 | } |
fe1d424d | 3171 | |
9a17484d LP |
3172 | break; |
3173 | } | |
3174 | ||
3175 | case SD_BUS_TYPE_ARRAY: { | |
3176 | size_t k; | |
3177 | ||
3178 | r = signature_element_length(t + 1, &k); | |
3179 | if (r < 0) | |
3180 | return r; | |
3181 | ||
3182 | { | |
9a17484d | 3183 | char s[k + 1]; |
9a17484d LP |
3184 | memcpy(s, t + 1, k); |
3185 | s[k] = 0; | |
9a17484d LP |
3186 | |
3187 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s); | |
3188 | if (r < 0) | |
3189 | return r; | |
430fb8fa LP |
3190 | if (r == 0) { |
3191 | if (n_loop <= 1) | |
3192 | return 0; | |
3193 | ||
9a17484d | 3194 | return -ENXIO; |
430fb8fa | 3195 | } |
fe1d424d | 3196 | } |
9a17484d | 3197 | |
fe1d424d LP |
3198 | if (n_array == (unsigned) -1) { |
3199 | types += k; | |
3200 | n_struct -= k; | |
9a17484d LP |
3201 | } |
3202 | ||
fe1d424d LP |
3203 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
3204 | if (r < 0) | |
3205 | return r; | |
3206 | ||
3207 | types = t + 1; | |
3208 | n_struct = k; | |
3209 | n_array = va_arg(ap, unsigned); | |
3210 | ||
9a17484d LP |
3211 | break; |
3212 | } | |
3213 | ||
3214 | case SD_BUS_TYPE_VARIANT: { | |
3215 | const char *s; | |
3216 | ||
3217 | s = va_arg(ap, const char *); | |
3218 | if (!s) | |
3219 | return -EINVAL; | |
3220 | ||
3221 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, s); | |
3222 | if (r < 0) | |
3223 | return r; | |
430fb8fa LP |
3224 | if (r == 0) { |
3225 | if (n_loop <= 1) | |
3226 | return 0; | |
3227 | ||
9a17484d | 3228 | return -ENXIO; |
430fb8fa | 3229 | } |
9a17484d | 3230 | |
fe1d424d | 3231 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
9a17484d LP |
3232 | if (r < 0) |
3233 | return r; | |
9a17484d | 3234 | |
fe1d424d LP |
3235 | types = s; |
3236 | n_struct = strlen(s); | |
3237 | n_array = (unsigned) -1; | |
3238 | ||
9a17484d LP |
3239 | break; |
3240 | } | |
3241 | ||
3242 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
3243 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
3244 | size_t k; | |
3245 | ||
3246 | r = signature_element_length(t, &k); | |
3247 | if (r < 0) | |
3248 | return r; | |
3249 | ||
3250 | { | |
3251 | char s[k - 1]; | |
3252 | memcpy(s, t + 1, k - 2); | |
3253 | s[k - 2] = 0; | |
3254 | ||
3255 | r = sd_bus_message_enter_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
3256 | if (r < 0) | |
3257 | return r; | |
430fb8fa LP |
3258 | if (r == 0) { |
3259 | if (n_loop <= 1) | |
3260 | return 0; | |
9a17484d | 3261 | return -ENXIO; |
430fb8fa | 3262 | } |
fe1d424d | 3263 | } |
9a17484d | 3264 | |
fe1d424d LP |
3265 | if (n_array == (unsigned) -1) { |
3266 | types += k - 1; | |
3267 | n_struct -= k - 1; | |
3268 | } | |
9a17484d | 3269 | |
fe1d424d LP |
3270 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
3271 | if (r < 0) | |
3272 | return r; | |
9a17484d | 3273 | |
fe1d424d LP |
3274 | types = t + 1; |
3275 | n_struct = k - 2; | |
3276 | n_array = (unsigned) -1; | |
9a17484d LP |
3277 | |
3278 | break; | |
3279 | } | |
3280 | ||
3281 | default: | |
fe1d424d | 3282 | return -EINVAL; |
9a17484d | 3283 | } |
9a17484d LP |
3284 | } |
3285 | ||
3286 | return 1; | |
3287 | } | |
3288 | ||
d9f644e2 | 3289 | _public_ int sd_bus_message_read(sd_bus_message *m, const char *types, ...) { |
9a17484d LP |
3290 | va_list ap; |
3291 | int r; | |
3292 | ||
9b07511d LP |
3293 | assert_return(m, -EINVAL); |
3294 | assert_return(m->sealed, -EPERM); | |
3295 | assert_return(types, -EINVAL); | |
9a17484d LP |
3296 | |
3297 | va_start(ap, types); | |
3298 | r = message_read_ap(m, types, ap); | |
3299 | va_end(ap); | |
3300 | ||
3301 | return r; | |
3302 | } | |
3303 | ||
d9f644e2 | 3304 | _public_ int sd_bus_message_skip(sd_bus_message *m, const char *types) { |
9b07511d LP |
3305 | int r; |
3306 | ||
3307 | assert_return(m, -EINVAL); | |
3308 | assert_return(m->sealed, -EPERM); | |
3309 | assert_return(types, -EINVAL); | |
3310 | ||
3311 | if (isempty(types)) | |
3312 | return 0; | |
3313 | ||
3314 | switch (*types) { | |
3315 | ||
3316 | case SD_BUS_TYPE_BYTE: | |
3317 | case SD_BUS_TYPE_BOOLEAN: | |
3318 | case SD_BUS_TYPE_INT16: | |
3319 | case SD_BUS_TYPE_UINT16: | |
3320 | case SD_BUS_TYPE_INT32: | |
3321 | case SD_BUS_TYPE_UINT32: | |
3322 | case SD_BUS_TYPE_INT64: | |
3323 | case SD_BUS_TYPE_UINT64: | |
3324 | case SD_BUS_TYPE_DOUBLE: | |
3325 | case SD_BUS_TYPE_STRING: | |
3326 | case SD_BUS_TYPE_OBJECT_PATH: | |
3327 | case SD_BUS_TYPE_SIGNATURE: | |
3328 | case SD_BUS_TYPE_UNIX_FD: | |
3329 | ||
3330 | r = sd_bus_message_read_basic(m, *types, NULL); | |
3331 | if (r <= 0) | |
3332 | return r; | |
3333 | ||
3334 | r = sd_bus_message_skip(m, types + 1); | |
3335 | if (r < 0) | |
3336 | return r; | |
3337 | ||
3338 | return 1; | |
3339 | ||
3340 | case SD_BUS_TYPE_ARRAY: { | |
3341 | size_t k; | |
3342 | ||
3343 | r = signature_element_length(types + 1, &k); | |
3344 | if (r < 0) | |
3345 | return r; | |
3346 | ||
3347 | { | |
3348 | char s[k+1]; | |
3349 | memcpy(s, types+1, k); | |
3350 | s[k] = 0; | |
3351 | ||
3352 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s); | |
3353 | if (r <= 0) | |
3354 | return r; | |
3355 | ||
3356 | for (;;) { | |
3357 | r = sd_bus_message_skip(m, s); | |
3358 | if (r < 0) | |
3359 | return r; | |
3360 | if (r == 0) | |
3361 | break; | |
3362 | } | |
3363 | ||
3364 | r = sd_bus_message_exit_container(m); | |
3365 | if (r < 0) | |
3366 | return r; | |
3367 | } | |
3368 | ||
3369 | r = sd_bus_message_skip(m, types + 1 + k); | |
3370 | if (r < 0) | |
3371 | return r; | |
3372 | ||
3373 | return 1; | |
3374 | } | |
3375 | ||
3376 | case SD_BUS_TYPE_VARIANT: { | |
3377 | const char *contents; | |
3378 | char x; | |
3379 | ||
3380 | r = sd_bus_message_peek_type(m, &x, &contents); | |
3381 | if (r <= 0) | |
3382 | return r; | |
3383 | ||
3384 | if (x != SD_BUS_TYPE_VARIANT) | |
3385 | return -ENXIO; | |
3386 | ||
3387 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents); | |
3388 | if (r <= 0) | |
3389 | return r; | |
3390 | ||
3391 | r = sd_bus_message_skip(m, contents); | |
3392 | if (r < 0) | |
3393 | return r; | |
3394 | assert(r != 0); | |
3395 | ||
3396 | r = sd_bus_message_exit_container(m); | |
3397 | if (r < 0) | |
3398 | return r; | |
3399 | ||
3400 | r = sd_bus_message_skip(m, types + 1); | |
3401 | if (r < 0) | |
3402 | return r; | |
3403 | ||
3404 | return 1; | |
3405 | } | |
3406 | ||
3407 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
3408 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
3409 | size_t k; | |
3410 | ||
3411 | r = signature_element_length(types, &k); | |
3412 | if (r < 0) | |
3413 | return r; | |
3414 | ||
3415 | { | |
3416 | char s[k-1]; | |
3417 | memcpy(s, types+1, k-2); | |
3418 | s[k-2] = 0; | |
3419 | ||
3420 | r = sd_bus_message_enter_container(m, *types == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
3421 | if (r <= 0) | |
3422 | return r; | |
3423 | ||
3424 | r = sd_bus_message_skip(m, s); | |
3425 | if (r < 0) | |
3426 | return r; | |
3427 | assert(r != 0); | |
3428 | ||
3429 | r = sd_bus_message_exit_container(m); | |
3430 | if (r < 0) | |
3431 | return r; | |
3432 | } | |
3433 | ||
3434 | r = sd_bus_message_skip(m, types + k); | |
3435 | if (r < 0) | |
3436 | return r; | |
3437 | ||
3438 | return 1; | |
3439 | } | |
3440 | ||
3441 | default: | |
3442 | return -EINVAL; | |
3443 | } | |
3444 | } | |
3445 | ||
d9f644e2 ZJS |
3446 | _public_ int sd_bus_message_read_array(sd_bus_message *m, |
3447 | char type, | |
3448 | const void **ptr, | |
3449 | size_t *size) { | |
b3af9646 LP |
3450 | struct bus_container *c; |
3451 | void *p; | |
3452 | size_t sz; | |
3453 | ssize_t align; | |
3454 | int r; | |
3455 | ||
9d6c7c82 LP |
3456 | assert_return(m, -EINVAL); |
3457 | assert_return(m->sealed, -EPERM); | |
3458 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
3459 | assert_return(ptr, -EINVAL); | |
3460 | assert_return(size, -EINVAL); | |
3461 | assert_return(!BUS_MESSAGE_NEED_BSWAP(m), -ENOTSUP); | |
b3af9646 LP |
3462 | |
3463 | align = bus_type_get_alignment(type); | |
3464 | if (align < 0) | |
3465 | return align; | |
3466 | ||
3467 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
66b26c5c | 3468 | if (r <= 0) |
b3af9646 LP |
3469 | return r; |
3470 | ||
3471 | c = message_get_container(m); | |
3472 | sz = BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
3473 | ||
5e86fd7b LP |
3474 | if (sz == 0) |
3475 | /* Zero length array, let's return some aligned | |
3476 | * pointer that is not NULL */ | |
3477 | p = (uint8_t*) NULL + align; | |
3478 | else { | |
3479 | r = message_peek_body(m, &m->rindex, align, sz, &p); | |
3480 | if (r < 0) | |
3481 | goto fail; | |
3482 | if (r == 0) { | |
3483 | r = -EBADMSG; | |
3484 | goto fail; | |
3485 | } | |
b3af9646 LP |
3486 | } |
3487 | ||
3488 | r = sd_bus_message_exit_container(m); | |
3489 | if (r < 0) | |
3490 | goto fail; | |
3491 | ||
3492 | *ptr = (const void*) p; | |
3493 | *size = sz; | |
3494 | ||
3495 | return 1; | |
3496 | ||
3497 | fail: | |
3498 | message_quit_container(m); | |
3499 | return r; | |
3500 | } | |
3501 | ||
80a46c73 LP |
3502 | static int message_peek_fields( |
3503 | sd_bus_message *m, | |
3504 | size_t *rindex, | |
3505 | size_t align, | |
3506 | size_t nbytes, | |
3507 | void **ret) { | |
3508 | ||
3509 | assert(m); | |
3510 | assert(rindex); | |
3511 | assert(align > 0); | |
3512 | ||
c91cb83c | 3513 | return buffer_peek(BUS_MESSAGE_FIELDS(m), BUS_MESSAGE_FIELDS_SIZE(m), rindex, align, nbytes, ret); |
80a46c73 LP |
3514 | } |
3515 | ||
9f26c90c LP |
3516 | static int message_peek_field_uint32( |
3517 | sd_bus_message *m, | |
3518 | size_t *ri, | |
3519 | uint32_t *ret) { | |
3520 | ||
3521 | int r; | |
3522 | void *q; | |
3523 | ||
3524 | assert(m); | |
3525 | assert(ri); | |
3526 | ||
3527 | r = message_peek_fields(m, ri, 4, 4, &q); | |
3528 | if (r < 0) | |
3529 | return r; | |
3530 | ||
3531 | if (ret) | |
3532 | *ret = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3533 | ||
3534 | return 0; | |
3535 | } | |
3536 | ||
80a46c73 LP |
3537 | static int message_peek_field_string( |
3538 | sd_bus_message *m, | |
6693860f | 3539 | bool (*validate)(const char *p), |
80a46c73 LP |
3540 | size_t *ri, |
3541 | const char **ret) { | |
3542 | ||
9f26c90c | 3543 | uint32_t l; |
80a46c73 LP |
3544 | int r; |
3545 | void *q; | |
3546 | ||
9a17484d | 3547 | assert(m); |
80a46c73 LP |
3548 | assert(ri); |
3549 | ||
9f26c90c | 3550 | r = message_peek_field_uint32(m, ri, &l); |
80a46c73 LP |
3551 | if (r < 0) |
3552 | return r; | |
3553 | ||
80a46c73 LP |
3554 | r = message_peek_fields(m, ri, 1, l+1, &q); |
3555 | if (r < 0) | |
3556 | return r; | |
9a17484d | 3557 | |
6693860f LP |
3558 | if (validate) { |
3559 | if (!validate_nul(q, l)) | |
3560 | return -EBADMSG; | |
3561 | ||
3562 | if (!validate(q)) | |
ac89bf1d LP |
3563 | return -EBADMSG; |
3564 | } else { | |
3565 | if (!validate_string(q, l)) | |
3566 | return -EBADMSG; | |
3567 | } | |
80a46c73 LP |
3568 | |
3569 | if (ret) | |
3570 | *ret = q; | |
3571 | ||
3572 | return 0; | |
3573 | } | |
3574 | ||
3575 | static int message_peek_field_signature( | |
3576 | sd_bus_message *m, | |
3577 | size_t *ri, | |
3578 | const char **ret) { | |
3579 | ||
3580 | size_t l; | |
3581 | int r; | |
3582 | void *q; | |
3583 | ||
3584 | assert(m); | |
3585 | assert(ri); | |
3586 | ||
3587 | r = message_peek_fields(m, ri, 1, 1, &q); | |
3588 | if (r < 0) | |
3589 | return r; | |
3590 | ||
3591 | l = *(uint8_t*) q; | |
3592 | r = message_peek_fields(m, ri, 1, l+1, &q); | |
3593 | if (r < 0) | |
3594 | return r; | |
3595 | ||
3596 | if (!validate_signature(q, l)) | |
3597 | return -EBADMSG; | |
3598 | ||
3599 | if (ret) | |
3600 | *ret = q; | |
3601 | ||
3602 | return 0; | |
3603 | } | |
3604 | ||
80a46c73 LP |
3605 | static int message_skip_fields( |
3606 | sd_bus_message *m, | |
3607 | size_t *ri, | |
3608 | uint32_t array_size, | |
3609 | const char **signature) { | |
3610 | ||
3611 | size_t original_index; | |
3612 | int r; | |
3613 | ||
3614 | assert(m); | |
3615 | assert(ri); | |
3616 | assert(signature); | |
3617 | ||
3618 | original_index = *ri; | |
3619 | ||
3620 | for (;;) { | |
3621 | char t; | |
80a46c73 LP |
3622 | size_t l; |
3623 | ||
3624 | if (array_size != (uint32_t) -1 && | |
3625 | array_size <= *ri - original_index) | |
3626 | return 0; | |
3627 | ||
3628 | t = **signature; | |
3629 | if (!t) | |
3630 | return 0; | |
3631 | ||
6693860f LP |
3632 | if (t == SD_BUS_TYPE_STRING) { |
3633 | ||
3634 | r = message_peek_field_string(m, NULL, ri, NULL); | |
3635 | if (r < 0) | |
3636 | return r; | |
3637 | ||
3638 | (*signature)++; | |
3639 | ||
3640 | } else if (t == SD_BUS_TYPE_OBJECT_PATH) { | |
80a46c73 | 3641 | |
6693860f | 3642 | r = message_peek_field_string(m, object_path_is_valid, ri, NULL); |
80a46c73 LP |
3643 | if (r < 0) |
3644 | return r; | |
3645 | ||
3646 | (*signature)++; | |
3647 | ||
3648 | } else if (t == SD_BUS_TYPE_SIGNATURE) { | |
3649 | ||
3650 | r = message_peek_field_signature(m, ri, NULL); | |
3651 | if (r < 0) | |
3652 | return r; | |
3653 | ||
3654 | (*signature)++; | |
3655 | ||
3656 | } else if (bus_type_is_basic(t)) { | |
27f6e5c7 | 3657 | ssize_t align, k; |
80a46c73 | 3658 | |
c66a2e0c TG |
3659 | align = bus_type_get_alignment(t); |
3660 | k = bus_type_get_size(t); | |
27f6e5c7 | 3661 | assert(align > 0 && k > 0); |
80a46c73 LP |
3662 | |
3663 | r = message_peek_fields(m, ri, align, k, NULL); | |
3664 | if (r < 0) | |
3665 | return r; | |
9a17484d | 3666 | |
80a46c73 LP |
3667 | (*signature)++; |
3668 | ||
3669 | } else if (t == SD_BUS_TYPE_ARRAY) { | |
3670 | ||
3671 | r = signature_element_length(*signature+1, &l); | |
3672 | if (r < 0) | |
3673 | return r; | |
3674 | ||
3675 | assert(l >= 1); | |
3676 | { | |
3677 | char sig[l-1], *s; | |
9f26c90c | 3678 | uint32_t nas; |
80a46c73 LP |
3679 | int alignment; |
3680 | ||
3681 | strncpy(sig, *signature + 1, l-1); | |
3682 | s = sig; | |
3683 | ||
3684 | alignment = bus_type_get_alignment(sig[0]); | |
3685 | if (alignment < 0) | |
3686 | return alignment; | |
3687 | ||
9f26c90c | 3688 | r = message_peek_field_uint32(m, ri, &nas); |
80a46c73 LP |
3689 | if (r < 0) |
3690 | return r; | |
ac89bf1d | 3691 | if (nas > BUS_ARRAY_MAX_SIZE) |
80a46c73 LP |
3692 | return -EBADMSG; |
3693 | ||
3694 | r = message_peek_fields(m, ri, alignment, 0, NULL); | |
3695 | if (r < 0) | |
3696 | return r; | |
3697 | ||
3698 | r = message_skip_fields(m, ri, nas, (const char**) &s); | |
3699 | if (r < 0) | |
3700 | return r; | |
3701 | } | |
3702 | ||
3703 | (*signature) += 1 + l; | |
3704 | ||
3705 | } else if (t == SD_BUS_TYPE_VARIANT) { | |
3706 | const char *s; | |
3707 | ||
3708 | r = message_peek_field_signature(m, ri, &s); | |
3709 | if (r < 0) | |
3710 | return r; | |
3711 | ||
3712 | r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s); | |
3713 | if (r < 0) | |
3714 | return r; | |
3715 | ||
3716 | (*signature)++; | |
3717 | ||
3718 | } else if (t == SD_BUS_TYPE_STRUCT || | |
3719 | t == SD_BUS_TYPE_DICT_ENTRY) { | |
3720 | ||
3721 | r = signature_element_length(*signature, &l); | |
3722 | if (r < 0) | |
3723 | return r; | |
3724 | ||
3725 | assert(l >= 2); | |
3726 | { | |
3727 | char sig[l-1], *s; | |
3728 | strncpy(sig, *signature + 1, l-1); | |
3729 | s = sig; | |
3730 | ||
3731 | r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s); | |
3732 | if (r < 0) | |
3733 | return r; | |
3734 | } | |
3735 | ||
3736 | *signature += l; | |
3737 | } else | |
3738 | return -EINVAL; | |
3739 | } | |
3740 | } | |
3741 | ||
6629161f | 3742 | int bus_message_parse_fields(sd_bus_message *m) { |
80a46c73 LP |
3743 | size_t ri; |
3744 | int r; | |
2c93b4ef | 3745 | uint32_t unix_fds = 0; |
80a46c73 LP |
3746 | |
3747 | assert(m); | |
3748 | ||
3749 | for (ri = 0; ri < BUS_MESSAGE_FIELDS_SIZE(m); ) { | |
3750 | const char *signature; | |
3751 | uint8_t *header; | |
3752 | ||
3753 | r = message_peek_fields(m, &ri, 8, 1, (void**) &header); | |
3754 | if (r < 0) | |
3755 | return r; | |
3756 | ||
3757 | r = message_peek_field_signature(m, &ri, &signature); | |
3758 | if (r < 0) | |
3759 | return r; | |
3760 | ||
3761 | switch (*header) { | |
3762 | case _SD_BUS_MESSAGE_HEADER_INVALID: | |
3763 | return -EBADMSG; | |
3764 | ||
3765 | case SD_BUS_MESSAGE_HEADER_PATH: | |
2c93b4ef LP |
3766 | |
3767 | if (m->path) | |
3768 | return -EBADMSG; | |
3769 | ||
80a46c73 LP |
3770 | if (!streq(signature, "o")) |
3771 | return -EBADMSG; | |
3772 | ||
6693860f | 3773 | r = message_peek_field_string(m, object_path_is_valid, &ri, &m->path); |
80a46c73 LP |
3774 | break; |
3775 | ||
3776 | case SD_BUS_MESSAGE_HEADER_INTERFACE: | |
2c93b4ef LP |
3777 | |
3778 | if (m->interface) | |
3779 | return -EBADMSG; | |
3780 | ||
80a46c73 LP |
3781 | if (!streq(signature, "s")) |
3782 | return -EBADMSG; | |
3783 | ||
6693860f | 3784 | r = message_peek_field_string(m, interface_name_is_valid, &ri, &m->interface); |
80a46c73 LP |
3785 | break; |
3786 | ||
3787 | case SD_BUS_MESSAGE_HEADER_MEMBER: | |
2c93b4ef LP |
3788 | |
3789 | if (m->member) | |
3790 | return -EBADMSG; | |
3791 | ||
80a46c73 LP |
3792 | if (!streq(signature, "s")) |
3793 | return -EBADMSG; | |
3794 | ||
6693860f | 3795 | r = message_peek_field_string(m, member_name_is_valid, &ri, &m->member); |
80a46c73 LP |
3796 | break; |
3797 | ||
3798 | case SD_BUS_MESSAGE_HEADER_ERROR_NAME: | |
2c93b4ef LP |
3799 | |
3800 | if (m->error.name) | |
3801 | return -EBADMSG; | |
3802 | ||
80a46c73 LP |
3803 | if (!streq(signature, "s")) |
3804 | return -EBADMSG; | |
3805 | ||
6693860f | 3806 | r = message_peek_field_string(m, error_name_is_valid, &ri, &m->error.name); |
80a46c73 LP |
3807 | break; |
3808 | ||
3809 | case SD_BUS_MESSAGE_HEADER_DESTINATION: | |
2c93b4ef LP |
3810 | |
3811 | if (m->destination) | |
3812 | return -EBADMSG; | |
3813 | ||
80a46c73 LP |
3814 | if (!streq(signature, "s")) |
3815 | return -EBADMSG; | |
3816 | ||
51b4ea6f | 3817 | r = message_peek_field_string(m, service_name_is_valid, &ri, &m->destination); |
80a46c73 LP |
3818 | break; |
3819 | ||
3820 | case SD_BUS_MESSAGE_HEADER_SENDER: | |
2c93b4ef LP |
3821 | |
3822 | if (m->sender) | |
3823 | return -EBADMSG; | |
3824 | ||
80a46c73 LP |
3825 | if (!streq(signature, "s")) |
3826 | return -EBADMSG; | |
3827 | ||
51b4ea6f | 3828 | r = message_peek_field_string(m, service_name_is_valid, &ri, &m->sender); |
80a46c73 LP |
3829 | break; |
3830 | ||
3831 | ||
3832 | case SD_BUS_MESSAGE_HEADER_SIGNATURE: { | |
3833 | const char *s; | |
3834 | char *c; | |
3835 | ||
2c93b4ef LP |
3836 | if (m->root_container.signature) |
3837 | return -EBADMSG; | |
3838 | ||
80a46c73 LP |
3839 | if (!streq(signature, "g")) |
3840 | return -EBADMSG; | |
3841 | ||
3842 | r = message_peek_field_signature(m, &ri, &s); | |
3843 | if (r < 0) | |
3844 | return r; | |
3845 | ||
3846 | c = strdup(s); | |
3847 | if (!c) | |
3848 | return -ENOMEM; | |
3849 | ||
3850 | free(m->root_container.signature); | |
3851 | m->root_container.signature = c; | |
80a46c73 LP |
3852 | break; |
3853 | } | |
3854 | ||
3855 | case SD_BUS_MESSAGE_HEADER_REPLY_SERIAL: | |
2c93b4ef LP |
3856 | if (m->reply_serial != 0) |
3857 | return -EBADMSG; | |
3858 | ||
80a46c73 LP |
3859 | if (!streq(signature, "u")) |
3860 | return -EBADMSG; | |
3861 | ||
3862 | r = message_peek_field_uint32(m, &ri, &m->reply_serial); | |
6693860f LP |
3863 | if (r < 0) |
3864 | return r; | |
3865 | ||
3866 | if (m->reply_serial == 0) | |
3867 | return -EBADMSG; | |
3868 | ||
80a46c73 LP |
3869 | break; |
3870 | ||
2c93b4ef LP |
3871 | case SD_BUS_MESSAGE_HEADER_UNIX_FDS: |
3872 | if (unix_fds != 0) | |
3873 | return -EBADMSG; | |
3874 | ||
3875 | if (!streq(signature, "u")) | |
3876 | return -EBADMSG; | |
3877 | ||
3878 | r = message_peek_field_uint32(m, &ri, &unix_fds); | |
3879 | if (r < 0) | |
3880 | return -EBADMSG; | |
3881 | ||
3882 | if (unix_fds == 0) | |
3883 | return -EBADMSG; | |
3884 | ||
3885 | break; | |
3886 | ||
80a46c73 LP |
3887 | default: |
3888 | r = message_skip_fields(m, &ri, (uint32_t) -1, (const char **) &signature); | |
3889 | } | |
3890 | ||
3891 | if (r < 0) | |
3892 | return r; | |
3893 | } | |
3894 | ||
2c93b4ef LP |
3895 | if (m->n_fds != unix_fds) |
3896 | return -EBADMSG; | |
3897 | ||
80a46c73 LP |
3898 | if (isempty(m->root_container.signature) != (BUS_MESSAGE_BODY_SIZE(m) == 0)) |
3899 | return -EBADMSG; | |
3900 | ||
3901 | switch (m->header->type) { | |
3902 | ||
40ca29a1 | 3903 | case SD_BUS_MESSAGE_SIGNAL: |
80a46c73 LP |
3904 | if (!m->path || !m->interface || !m->member) |
3905 | return -EBADMSG; | |
3906 | break; | |
3907 | ||
40ca29a1 | 3908 | case SD_BUS_MESSAGE_METHOD_CALL: |
80a46c73 LP |
3909 | |
3910 | if (!m->path || !m->member) | |
3911 | return -EBADMSG; | |
3912 | ||
3913 | break; | |
3914 | ||
40ca29a1 | 3915 | case SD_BUS_MESSAGE_METHOD_RETURN: |
80a46c73 LP |
3916 | |
3917 | if (m->reply_serial == 0) | |
3918 | return -EBADMSG; | |
3919 | break; | |
3920 | ||
40ca29a1 | 3921 | case SD_BUS_MESSAGE_METHOD_ERROR: |
80a46c73 LP |
3922 | |
3923 | if (m->reply_serial == 0 || !m->error.name) | |
3924 | return -EBADMSG; | |
3925 | break; | |
3926 | } | |
9a17484d | 3927 | |
89ffcd2a | 3928 | /* Try to read the error message, but if we can't it's a non-issue */ |
40ca29a1 | 3929 | if (m->header->type == SD_BUS_MESSAGE_METHOD_ERROR) |
89ffcd2a LP |
3930 | sd_bus_message_read(m, "s", &m->error.message); |
3931 | ||
9a17484d LP |
3932 | return 0; |
3933 | } | |
3934 | ||
9a17484d | 3935 | int bus_message_seal(sd_bus_message *m, uint64_t serial) { |
47e6ce32 | 3936 | struct bus_body_part *part; |
69aec65c | 3937 | size_t l, a; |
47e6ce32 LP |
3938 | unsigned i; |
3939 | int r; | |
9a17484d LP |
3940 | |
3941 | assert(m); | |
3942 | ||
3943 | if (m->sealed) | |
3944 | return -EPERM; | |
3945 | ||
3946 | if (m->n_containers > 0) | |
3947 | return -EBADMSG; | |
3948 | ||
13c299d3 LP |
3949 | if (m->poisoned) |
3950 | return -ESTALE; | |
3951 | ||
9a17484d LP |
3952 | /* If there's a non-trivial signature set, then add it in here */ |
3953 | if (!isempty(m->root_container.signature)) { | |
80a46c73 | 3954 | r = message_append_field_signature(m, SD_BUS_MESSAGE_HEADER_SIGNATURE, m->root_container.signature, NULL); |
9a17484d LP |
3955 | if (r < 0) |
3956 | return r; | |
3957 | } | |
3958 | ||
3959 | if (m->n_fds > 0) { | |
3960 | r = message_append_field_uint32(m, SD_BUS_MESSAGE_HEADER_UNIX_FDS, m->n_fds); | |
3961 | if (r < 0) | |
3962 | return r; | |
3963 | } | |
3964 | ||
66b26c5c LP |
3965 | /* Add padding at the end of the fields part, since we know |
3966 | * the body needs to start at an 8 byte alignment. We made | |
3967 | * sure we allocated enough space for this, so all we need to | |
3968 | * do here is to zero it out. */ | |
69aec65c LP |
3969 | l = BUS_MESSAGE_FIELDS_SIZE(m); |
3970 | a = ALIGN8(l) - l; | |
c91cb83c LP |
3971 | if (a > 0) |
3972 | memset((uint8_t*) BUS_MESSAGE_FIELDS(m) + l, 0, a); | |
69aec65c | 3973 | |
66b26c5c LP |
3974 | /* If this is something we can send as memfd, then let's seal |
3975 | the memfd now. Note that we can send memfds as payload only | |
3976 | for directed messages, and not for broadcasts. */ | |
8f155917 | 3977 | if (m->destination && m->bus && m->bus->use_memfd) { |
66b26c5c | 3978 | MESSAGE_FOREACH_PART(part, i, m) |
8f155917 | 3979 | if (part->memfd >= 0 && !part->sealed && (part->size > MEMFD_MIN_SIZE || m->bus->use_memfd < 0)) { |
66b26c5c | 3980 | bus_body_part_unmap(part); |
a392d361 | 3981 | |
66b26c5c LP |
3982 | if (ioctl(part->memfd, KDBUS_CMD_MEMFD_SEAL_SET, 1) >= 0) |
3983 | part->sealed = true; | |
3984 | } | |
3985 | } | |
47e6ce32 | 3986 | |
9a17484d LP |
3987 | m->header->serial = serial; |
3988 | m->sealed = true; | |
3989 | ||
9a17484d LP |
3990 | return 0; |
3991 | } | |
3992 | ||
d9f644e2 | 3993 | _public_ int sd_bus_message_set_destination(sd_bus_message *m, const char *destination) { |
9d6c7c82 LP |
3994 | assert_return(m, -EINVAL); |
3995 | assert_return(destination, -EINVAL); | |
3996 | assert_return(!m->sealed, -EPERM); | |
3997 | assert_return(!m->destination, -EEXIST); | |
9a17484d LP |
3998 | |
3999 | return message_append_field_string(m, SD_BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &m->destination); | |
4000 | } | |
4001 | ||
de1c301e LP |
4002 | int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz) { |
4003 | size_t total; | |
de1c301e | 4004 | void *p, *e; |
bc7fd8cd LP |
4005 | unsigned i; |
4006 | struct bus_body_part *part; | |
de1c301e LP |
4007 | |
4008 | assert(m); | |
4009 | assert(buffer); | |
4010 | assert(sz); | |
4011 | ||
6629161f | 4012 | total = BUS_MESSAGE_SIZE(m); |
de1c301e LP |
4013 | |
4014 | p = malloc(total); | |
4015 | if (!p) | |
4016 | return -ENOMEM; | |
4017 | ||
c91cb83c | 4018 | e = mempcpy(p, m->header, BUS_MESSAGE_BODY_BEGIN(m)); |
9b29bb68 | 4019 | MESSAGE_FOREACH_PART(part, i, m) |
bc7fd8cd | 4020 | e = mempcpy(e, part->data, part->size); |
2100fa10 LP |
4021 | |
4022 | assert(total == (size_t) ((uint8_t*) e - (uint8_t*) p)); | |
de1c301e LP |
4023 | |
4024 | *buffer = p; | |
4025 | *sz = total; | |
4026 | ||
4027 | return 0; | |
4028 | } | |
89ffcd2a LP |
4029 | |
4030 | int bus_message_read_strv_extend(sd_bus_message *m, char ***l) { | |
4031 | int r; | |
4032 | ||
4033 | assert(m); | |
4034 | assert(l); | |
4035 | ||
4036 | r = sd_bus_message_enter_container(m, 'a', "s"); | |
4686d1b6 | 4037 | if (r <= 0) |
89ffcd2a LP |
4038 | return r; |
4039 | ||
4040 | for (;;) { | |
4041 | const char *s; | |
4042 | ||
4043 | r = sd_bus_message_read_basic(m, 's', &s); | |
4044 | if (r < 0) | |
4045 | return r; | |
4046 | if (r == 0) | |
4047 | break; | |
4048 | ||
4049 | r = strv_extend(l, s); | |
4050 | if (r < 0) | |
4051 | return r; | |
4052 | } | |
4053 | ||
4054 | r = sd_bus_message_exit_container(m); | |
4055 | if (r < 0) | |
4056 | return r; | |
4057 | ||
405cd3aa | 4058 | return 1; |
89ffcd2a | 4059 | } |
392d5b37 | 4060 | |
ba341e7c | 4061 | _public_ int sd_bus_message_read_strv(sd_bus_message *m, char ***l) { |
4686d1b6 MAP |
4062 | char **strv = NULL; |
4063 | int r; | |
4064 | ||
4065 | assert_return(m, -EINVAL); | |
4066 | assert_return(m->sealed, -EPERM); | |
4067 | assert_return(l, -EINVAL); | |
4068 | ||
4069 | r = bus_message_read_strv_extend(m, &strv); | |
4070 | if (r <= 0) { | |
4071 | strv_free(strv); | |
4072 | return r; | |
4073 | } | |
4074 | ||
4075 | *l = strv; | |
4076 | return 1; | |
4077 | } | |
4078 | ||
392d5b37 LP |
4079 | const char* bus_message_get_arg(sd_bus_message *m, unsigned i) { |
4080 | int r; | |
42c5aaf3 LP |
4081 | const char *t = NULL; |
4082 | unsigned j; | |
392d5b37 LP |
4083 | |
4084 | assert(m); | |
4085 | ||
4086 | r = sd_bus_message_rewind(m, true); | |
4087 | if (r < 0) | |
4088 | return NULL; | |
4089 | ||
42c5aaf3 LP |
4090 | for (j = 0; j <= i; j++) { |
4091 | char type; | |
4092 | ||
392d5b37 LP |
4093 | r = sd_bus_message_peek_type(m, &type, NULL); |
4094 | if (r < 0) | |
4095 | return NULL; | |
4096 | ||
4097 | if (type != SD_BUS_TYPE_STRING && | |
4098 | type != SD_BUS_TYPE_OBJECT_PATH && | |
4099 | type != SD_BUS_TYPE_SIGNATURE) | |
4100 | return NULL; | |
4101 | ||
4102 | r = sd_bus_message_read_basic(m, type, &t); | |
4103 | if (r < 0) | |
4104 | return NULL; | |
392d5b37 LP |
4105 | } |
4106 | ||
392d5b37 LP |
4107 | return t; |
4108 | } | |
2100fa10 | 4109 | |
c91cb83c LP |
4110 | bool bus_header_is_complete(struct bus_header *h, size_t size) { |
4111 | size_t full; | |
4112 | ||
4113 | assert(h); | |
4114 | assert(size); | |
4115 | ||
4116 | if (size < sizeof(struct bus_header)) | |
4117 | return false; | |
4118 | ||
4119 | full = sizeof(struct bus_header) + | |
4120 | (h->endian == SD_BUS_NATIVE_ENDIAN ? h->fields_size : bswap_32(h->fields_size)); | |
4121 | ||
4122 | return size >= full; | |
4123 | } | |
4124 | ||
4125 | int bus_header_message_size(struct bus_header *h, size_t *sum) { | |
6629161f LP |
4126 | size_t fs, bs; |
4127 | ||
4128 | assert(h); | |
4129 | assert(sum); | |
4130 | ||
4131 | if (h->endian == SD_BUS_NATIVE_ENDIAN) { | |
4132 | fs = h->fields_size; | |
4133 | bs = h->body_size; | |
4134 | } else if (h->endian == SD_BUS_REVERSE_ENDIAN) { | |
4135 | fs = bswap_32(h->fields_size); | |
4136 | bs = bswap_32(h->body_size); | |
4137 | } else | |
4138 | return -EBADMSG; | |
2100fa10 | 4139 | |
6629161f LP |
4140 | *sum = sizeof(struct bus_header) + ALIGN8(fs) + bs; |
4141 | return 0; | |
2100fa10 | 4142 | } |
eb01ba5d | 4143 | |
d9f644e2 | 4144 | _public_ int sd_bus_message_get_errno(sd_bus_message *m) { |
40ca29a1 | 4145 | assert_return(m, -EINVAL); |
eb01ba5d | 4146 | |
40ca29a1 | 4147 | if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) |
eb01ba5d LP |
4148 | return 0; |
4149 | ||
40ca29a1 | 4150 | return sd_bus_error_get_errno(&m->error); |
eb01ba5d | 4151 | } |
29ddb38f | 4152 | |
d9f644e2 | 4153 | _public_ const char* sd_bus_message_get_signature(sd_bus_message *m, int complete) { |
29ddb38f LP |
4154 | struct bus_container *c; |
4155 | ||
9d6c7c82 | 4156 | assert_return(m, NULL); |
29ddb38f LP |
4157 | |
4158 | c = complete ? &m->root_container : message_get_container(m); | |
40ca29a1 | 4159 | return c->signature ?: ""; |
29ddb38f | 4160 | } |
c430fee6 | 4161 | |
d9f644e2 | 4162 | _public_ int sd_bus_message_copy(sd_bus_message *m, sd_bus_message *source, int all) { |
c430fee6 LP |
4163 | bool done_something = false; |
4164 | int r; | |
4165 | ||
80ba3b84 LP |
4166 | assert_return(m, -EINVAL); |
4167 | assert_return(source, -EINVAL); | |
4168 | assert_return(!m->sealed, -EPERM); | |
4169 | assert_return(source->sealed, -EPERM); | |
4170 | ||
c430fee6 LP |
4171 | do { |
4172 | const char *contents; | |
4173 | char type; | |
4174 | union { | |
4175 | uint8_t u8; | |
4176 | uint16_t u16; | |
4177 | int16_t s16; | |
4178 | uint32_t u32; | |
4179 | int32_t s32; | |
4180 | uint64_t u64; | |
4181 | int64_t s64; | |
4182 | double d64; | |
4183 | const char *string; | |
4184 | int i; | |
4185 | } basic; | |
4186 | ||
4187 | r = sd_bus_message_peek_type(source, &type, &contents); | |
4188 | if (r < 0) | |
4189 | return r; | |
4190 | if (r == 0) | |
4191 | break; | |
4192 | ||
4193 | done_something = true; | |
4194 | ||
4195 | if (bus_type_is_container(type) > 0) { | |
4196 | ||
4197 | r = sd_bus_message_enter_container(source, type, contents); | |
4198 | if (r < 0) | |
4199 | return r; | |
4200 | ||
4201 | r = sd_bus_message_open_container(m, type, contents); | |
4202 | if (r < 0) | |
4203 | return r; | |
4204 | ||
4205 | r = sd_bus_message_copy(m, source, true); | |
4206 | if (r < 0) | |
4207 | return r; | |
4208 | ||
4209 | r = sd_bus_message_close_container(m); | |
4210 | if (r < 0) | |
4211 | return r; | |
4212 | ||
4213 | r = sd_bus_message_exit_container(source); | |
4214 | if (r < 0) | |
4215 | return r; | |
4216 | ||
4217 | continue; | |
4218 | } | |
4219 | ||
4220 | r = sd_bus_message_read_basic(source, type, &basic); | |
4221 | if (r < 0) | |
4222 | return r; | |
4223 | ||
4224 | assert(r > 0); | |
4225 | ||
4226 | if (type == SD_BUS_TYPE_OBJECT_PATH || | |
4227 | type == SD_BUS_TYPE_SIGNATURE || | |
4228 | type == SD_BUS_TYPE_STRING) | |
4229 | r = sd_bus_message_append_basic(m, type, basic.string); | |
4230 | else | |
4231 | r = sd_bus_message_append_basic(m, type, &basic); | |
4232 | ||
4233 | if (r < 0) | |
4234 | return r; | |
4235 | ||
4236 | } while (all); | |
4237 | ||
4238 | return done_something; | |
4239 | } | |
4240 | ||
d9f644e2 | 4241 | _public_ int sd_bus_message_verify_type(sd_bus_message *m, char type, const char *contents) { |
c430fee6 LP |
4242 | const char *c; |
4243 | char t; | |
4244 | int r; | |
4245 | ||
4246 | assert_return(m, -EINVAL); | |
4247 | assert_return(m->sealed, -EPERM); | |
4248 | assert_return(!type || bus_type_is_valid(type), -EINVAL); | |
4249 | assert_return(!contents || signature_is_valid(contents, true), -EINVAL); | |
4250 | assert_return(type || contents, -EINVAL); | |
4251 | assert_return(!contents || !type || bus_type_is_container(type), -EINVAL); | |
4252 | ||
4253 | r = sd_bus_message_peek_type(m, &t, &c); | |
4254 | if (r <= 0) | |
4255 | return r; | |
4256 | ||
4257 | if (type != 0 && type != t) | |
4258 | return 0; | |
4259 | ||
4260 | if (contents && !streq_ptr(contents, c)) | |
4261 | return 0; | |
4262 | ||
4263 | return 1; | |
4264 | } | |
2be44176 LP |
4265 | |
4266 | _public_ sd_bus *sd_bus_message_get_bus(sd_bus_message *m) { | |
4267 | assert_return(m, NULL); | |
4268 | ||
4269 | return m->bus; | |
4270 | } |