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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
de1c301e LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2013 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
21 | #include <errno.h> | |
2c93b4ef | 22 | #include <fcntl.h> |
bc7fd8cd | 23 | #include <sys/mman.h> |
de1c301e | 24 | |
de1c301e | 25 | #include "sd-bus.h" |
07630cea | 26 | |
b5efdb8a | 27 | #include "alloc-util.h" |
07630cea | 28 | #include "bus-gvariant.h" |
de1c301e | 29 | #include "bus-internal.h" |
3ffd4af2 | 30 | #include "bus-message.h" |
de1c301e | 31 | #include "bus-signature.h" |
07630cea | 32 | #include "bus-type.h" |
057171ef | 33 | #include "bus-util.h" |
3ffd4af2 | 34 | #include "fd-util.h" |
afc5dbf3 | 35 | #include "io-util.h" |
07630cea LP |
36 | #include "memfd-util.h" |
37 | #include "string-util.h" | |
38 | #include "strv.h" | |
39 | #include "time-util.h" | |
40 | #include "utf8.h" | |
41 | #include "util.h" | |
de1c301e | 42 | |
80a46c73 | 43 | static int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored); |
de1c301e | 44 | |
bc7fd8cd LP |
45 | static void *adjust_pointer(const void *p, void *old_base, size_t sz, void *new_base) { |
46 | ||
47 | if (p == NULL) | |
48 | return NULL; | |
49 | ||
50 | if (old_base == new_base) | |
51 | return (void*) p; | |
52 | ||
53 | if ((uint8_t*) p < (uint8_t*) old_base) | |
54 | return (void*) p; | |
55 | ||
56 | if ((uint8_t*) p >= (uint8_t*) old_base + sz) | |
57 | return (void*) p; | |
58 | ||
59 | return (uint8_t*) new_base + ((uint8_t*) p - (uint8_t*) old_base); | |
60 | } | |
61 | ||
62 | static void message_free_part(sd_bus_message *m, struct bus_body_part *part) { | |
63 | assert(m); | |
64 | assert(part); | |
65 | ||
a132bef0 ZJS |
66 | if (part->memfd >= 0) |
67 | close_and_munmap(part->memfd, part->mmap_begin, part->mapped); | |
68 | else if (part->munmap_this) | |
7dcd79c2 | 69 | munmap(part->mmap_begin, part->mapped); |
453a0c29 | 70 | else if (part->free_this) |
bc7fd8cd LP |
71 | free(part->data); |
72 | ||
73 | if (part != &m->body) | |
74 | free(part); | |
75 | } | |
76 | ||
77 | static void message_reset_parts(sd_bus_message *m) { | |
78 | struct bus_body_part *part; | |
79 | ||
80 | assert(m); | |
81 | ||
82 | part = &m->body; | |
83 | while (m->n_body_parts > 0) { | |
84 | struct bus_body_part *next = part->next; | |
85 | message_free_part(m, part); | |
86 | part = next; | |
87 | m->n_body_parts--; | |
88 | } | |
89 | ||
90 | m->body_end = NULL; | |
91 | ||
92 | m->cached_rindex_part = NULL; | |
93 | m->cached_rindex_part_begin = 0; | |
94 | } | |
95 | ||
96 | static void message_reset_containers(sd_bus_message *m) { | |
9a17484d LP |
97 | unsigned i; |
98 | ||
99 | assert(m); | |
100 | ||
6647dc66 | 101 | for (i = 0; i < m->n_containers; i++) { |
9a17484d | 102 | free(m->containers[i].signature); |
6647dc66 LP |
103 | free(m->containers[i].offsets); |
104 | } | |
9a17484d | 105 | |
a1e58e8e | 106 | m->containers = mfree(m->containers); |
9a17484d | 107 | |
306f07be | 108 | m->n_containers = m->containers_allocated = 0; |
9a17484d LP |
109 | m->root_container.index = 0; |
110 | } | |
111 | ||
de1c301e | 112 | static void message_free(sd_bus_message *m) { |
de1c301e LP |
113 | assert(m); |
114 | ||
115 | if (m->free_header) | |
116 | free(m->header); | |
117 | ||
bc7fd8cd | 118 | message_reset_parts(m); |
de1c301e | 119 | |
2a0958d2 | 120 | sd_bus_unref(m->bus); |
f54514f3 | 121 | |
2c93b4ef LP |
122 | if (m->free_fds) { |
123 | close_many(m->fds, m->n_fds); | |
124 | free(m->fds); | |
125 | } | |
de1c301e | 126 | |
bc7fd8cd LP |
127 | if (m->iovec != m->iovec_fixed) |
128 | free(m->iovec); | |
129 | ||
f00ef7f5 | 130 | m->destination_ptr = mfree(m->destination_ptr); |
bc7fd8cd | 131 | message_reset_containers(m); |
9a17484d | 132 | free(m->root_container.signature); |
6647dc66 | 133 | free(m->root_container.offsets); |
de1c301e | 134 | |
3798fd4c | 135 | free(m->root_container.peeked_signature); |
d8d3d8a7 | 136 | |
5b12334d | 137 | bus_creds_done(&m->creds); |
de1c301e LP |
138 | free(m); |
139 | } | |
140 | ||
c1b9d935 | 141 | static void *message_extend_fields(sd_bus_message *m, size_t align, size_t sz, bool add_offset) { |
c91cb83c LP |
142 | void *op, *np; |
143 | size_t old_size, new_size, start; | |
de1c301e | 144 | |
c91cb83c | 145 | assert(m); |
35460afc LP |
146 | |
147 | if (m->poisoned) | |
148 | return NULL; | |
de1c301e | 149 | |
2ac7c17f | 150 | old_size = sizeof(struct bus_header) + m->fields_size; |
c91cb83c LP |
151 | start = ALIGN_TO(old_size, align); |
152 | new_size = start + sz; | |
de1c301e | 153 | |
2ac7c17f LP |
154 | if (new_size < start || |
155 | new_size > (size_t) ((uint32_t) -1)) | |
156 | goto poison; | |
157 | ||
c91cb83c LP |
158 | if (old_size == new_size) |
159 | return (uint8_t*) m->header + old_size; | |
de1c301e | 160 | |
c91cb83c LP |
161 | if (m->free_header) { |
162 | np = realloc(m->header, ALIGN8(new_size)); | |
163 | if (!np) | |
164 | goto poison; | |
165 | } else { | |
61233823 | 166 | /* Initially, the header is allocated as part of |
c91cb83c LP |
167 | * the sd_bus_message itself, let's replace it by |
168 | * dynamic data */ | |
de1c301e | 169 | |
c91cb83c LP |
170 | np = malloc(ALIGN8(new_size)); |
171 | if (!np) | |
172 | goto poison; | |
de1c301e | 173 | |
c91cb83c LP |
174 | memcpy(np, m->header, sizeof(struct bus_header)); |
175 | } | |
de1c301e | 176 | |
c91cb83c LP |
177 | /* Zero out padding */ |
178 | if (start > old_size) | |
29804cc1 | 179 | memzero((uint8_t*) np + old_size, start - old_size); |
bc7fd8cd | 180 | |
c91cb83c LP |
181 | op = m->header; |
182 | m->header = np; | |
2ac7c17f | 183 | m->fields_size = new_size - sizeof(struct bus_header); |
de1c301e | 184 | |
bc7fd8cd | 185 | /* Adjust quick access pointers */ |
c91cb83c LP |
186 | m->path = adjust_pointer(m->path, op, old_size, m->header); |
187 | m->interface = adjust_pointer(m->interface, op, old_size, m->header); | |
188 | m->member = adjust_pointer(m->member, op, old_size, m->header); | |
189 | m->destination = adjust_pointer(m->destination, op, old_size, m->header); | |
190 | m->sender = adjust_pointer(m->sender, op, old_size, m->header); | |
191 | m->error.name = adjust_pointer(m->error.name, op, old_size, m->header); | |
bc7fd8cd | 192 | |
c91cb83c | 193 | m->free_header = true; |
de1c301e | 194 | |
c1b9d935 LP |
195 | if (add_offset) { |
196 | if (m->n_header_offsets >= ELEMENTSOF(m->header_offsets)) | |
197 | goto poison; | |
198 | ||
199 | m->header_offsets[m->n_header_offsets++] = new_size - sizeof(struct bus_header); | |
200 | } | |
201 | ||
c91cb83c LP |
202 | return (uint8_t*) np + start; |
203 | ||
204 | poison: | |
205 | m->poisoned = true; | |
206 | return NULL; | |
de1c301e LP |
207 | } |
208 | ||
209 | static int message_append_field_string( | |
210 | sd_bus_message *m, | |
2ac7c17f | 211 | uint64_t h, |
de1c301e LP |
212 | char type, |
213 | const char *s, | |
214 | const char **ret) { | |
215 | ||
216 | size_t l; | |
217 | uint8_t *p; | |
218 | ||
219 | assert(m); | |
220 | ||
2ac7c17f LP |
221 | /* dbus1 only allows 8bit header field ids */ |
222 | if (h > 0xFF) | |
223 | return -EINVAL; | |
224 | ||
c1b9d935 LP |
225 | /* dbus1 doesn't allow strings over 32bit, let's enforce this |
226 | * globally, to not risk convertability */ | |
de1c301e LP |
227 | l = strlen(s); |
228 | if (l > (size_t) (uint32_t) -1) | |
229 | return -EINVAL; | |
230 | ||
c1b9d935 LP |
231 | /* Signature "(yv)" where the variant contains "s" */ |
232 | ||
6647dc66 | 233 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
de1c301e | 234 | |
2ac7c17f LP |
235 | /* (field id 64bit, ((string + NUL) + NUL + signature string 's') */ |
236 | p = message_extend_fields(m, 8, 8 + l + 1 + 1 + 1, true); | |
c1b9d935 LP |
237 | if (!p) |
238 | return -ENOMEM; | |
de1c301e | 239 | |
2ac7c17f | 240 | *((uint64_t*) p) = h; |
c1b9d935 LP |
241 | memcpy(p+8, s, l); |
242 | p[8+l] = 0; | |
243 | p[8+l+1] = 0; | |
244 | p[8+l+2] = type; | |
de1c301e | 245 | |
c1b9d935 | 246 | if (ret) |
6647dc66 | 247 | *ret = (char*) p + 8; |
c1b9d935 LP |
248 | |
249 | } else { | |
250 | /* (field id byte + (signature length + signature 's' + NUL) + (string length + string + NUL)) */ | |
251 | p = message_extend_fields(m, 8, 4 + 4 + l + 1, false); | |
252 | if (!p) | |
253 | return -ENOMEM; | |
254 | ||
2ac7c17f | 255 | p[0] = (uint8_t) h; |
c1b9d935 LP |
256 | p[1] = 1; |
257 | p[2] = type; | |
258 | p[3] = 0; | |
259 | ||
260 | ((uint32_t*) p)[1] = l; | |
261 | memcpy(p + 8, s, l + 1); | |
262 | ||
263 | if (ret) | |
264 | *ret = (char*) p + 8; | |
265 | } | |
de1c301e LP |
266 | |
267 | return 0; | |
268 | } | |
269 | ||
270 | static int message_append_field_signature( | |
271 | sd_bus_message *m, | |
2ac7c17f | 272 | uint64_t h, |
de1c301e LP |
273 | const char *s, |
274 | const char **ret) { | |
275 | ||
276 | size_t l; | |
277 | uint8_t *p; | |
278 | ||
279 | assert(m); | |
280 | ||
2ac7c17f LP |
281 | /* dbus1 only allows 8bit header field ids */ |
282 | if (h > 0xFF) | |
283 | return -EINVAL; | |
284 | ||
285 | /* dbus1 doesn't allow signatures over 8bit, let's enforce | |
c1b9d935 | 286 | * this globally, to not risk convertability */ |
de1c301e LP |
287 | l = strlen(s); |
288 | if (l > 255) | |
289 | return -EINVAL; | |
290 | ||
c1b9d935 LP |
291 | /* Signature "(yv)" where the variant contains "g" */ |
292 | ||
6647dc66 | 293 | if (BUS_MESSAGE_IS_GVARIANT(m)) |
c1b9d935 LP |
294 | /* For gvariant the serialization is the same as for normal strings */ |
295 | return message_append_field_string(m, h, 'g', s, ret); | |
296 | else { | |
297 | /* (field id byte + (signature length + signature 'g' + NUL) + (string length + string + NUL)) */ | |
298 | p = message_extend_fields(m, 8, 4 + 1 + l + 1, false); | |
299 | if (!p) | |
300 | return -ENOMEM; | |
de1c301e | 301 | |
2ac7c17f | 302 | p[0] = (uint8_t) h; |
c1b9d935 LP |
303 | p[1] = 1; |
304 | p[2] = SD_BUS_TYPE_SIGNATURE; | |
305 | p[3] = 0; | |
306 | p[4] = l; | |
307 | memcpy(p + 5, s, l + 1); | |
de1c301e | 308 | |
c1b9d935 LP |
309 | if (ret) |
310 | *ret = (const char*) p + 5; | |
311 | } | |
de1c301e LP |
312 | |
313 | return 0; | |
314 | } | |
315 | ||
2ac7c17f | 316 | static int message_append_field_uint32(sd_bus_message *m, uint64_t h, uint32_t x) { |
de1c301e LP |
317 | uint8_t *p; |
318 | ||
319 | assert(m); | |
320 | ||
2ac7c17f LP |
321 | /* dbus1 only allows 8bit header field ids */ |
322 | if (h > 0xFF) | |
323 | return -EINVAL; | |
324 | ||
6647dc66 | 325 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f | 326 | /* (field id 64bit + ((value + NUL + signature string 'u') */ |
c1b9d935 | 327 | |
2ac7c17f | 328 | p = message_extend_fields(m, 8, 8 + 4 + 1 + 1, true); |
c1b9d935 LP |
329 | if (!p) |
330 | return -ENOMEM; | |
de1c301e | 331 | |
2ac7c17f | 332 | *((uint64_t*) p) = h; |
c1b9d935 LP |
333 | *((uint32_t*) (p + 8)) = x; |
334 | p[12] = 0; | |
335 | p[13] = 'u'; | |
336 | } else { | |
337 | /* (field id byte + (signature length + signature 'u' + NUL) + value) */ | |
338 | p = message_extend_fields(m, 8, 4 + 4, false); | |
339 | if (!p) | |
340 | return -ENOMEM; | |
341 | ||
2ac7c17f | 342 | p[0] = (uint8_t) h; |
c1b9d935 | 343 | p[1] = 1; |
2ac7c17f | 344 | p[2] = 'u'; |
c1b9d935 | 345 | p[3] = 0; |
de1c301e | 346 | |
c1b9d935 LP |
347 | ((uint32_t*) p)[1] = x; |
348 | } | |
de1c301e LP |
349 | |
350 | return 0; | |
351 | } | |
352 | ||
2ac7c17f LP |
353 | static int message_append_field_uint64(sd_bus_message *m, uint64_t h, uint64_t x) { |
354 | uint8_t *p; | |
355 | ||
356 | assert(m); | |
357 | ||
358 | /* dbus1 only allows 8bit header field ids */ | |
359 | if (h > 0xFF) | |
360 | return -EINVAL; | |
361 | ||
362 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
363 | /* (field id 64bit + ((value + NUL + signature string 't') */ | |
364 | ||
365 | p = message_extend_fields(m, 8, 8 + 8 + 1 + 1, true); | |
366 | if (!p) | |
367 | return -ENOMEM; | |
368 | ||
369 | *((uint64_t*) p) = h; | |
370 | *((uint64_t*) (p + 8)) = x; | |
371 | p[16] = 0; | |
372 | p[17] = 't'; | |
373 | } else { | |
374 | /* (field id byte + (signature length + signature 't' + NUL) + 4 byte padding + value) */ | |
375 | p = message_extend_fields(m, 8, 4 + 4 + 8, false); | |
376 | if (!p) | |
377 | return -ENOMEM; | |
378 | ||
379 | p[0] = (uint8_t) h; | |
380 | p[1] = 1; | |
381 | p[2] = 't'; | |
382 | p[3] = 0; | |
383 | p[4] = 0; | |
384 | p[5] = 0; | |
385 | p[6] = 0; | |
386 | p[7] = 0; | |
387 | ||
388 | ((uint64_t*) p)[1] = x; | |
389 | } | |
390 | ||
391 | return 0; | |
392 | } | |
393 | ||
b267a6d2 LP |
394 | static int message_append_reply_cookie(sd_bus_message *m, uint64_t cookie) { |
395 | assert(m); | |
396 | ||
397 | if (BUS_MESSAGE_IS_GVARIANT(m)) | |
398 | return message_append_field_uint64(m, BUS_MESSAGE_HEADER_REPLY_SERIAL, cookie); | |
399 | else { | |
400 | /* 64bit cookies are not supported on dbus1 */ | |
401 | if (cookie > 0xffffffffUL) | |
15411c0c | 402 | return -EOPNOTSUPP; |
b267a6d2 LP |
403 | |
404 | return message_append_field_uint32(m, BUS_MESSAGE_HEADER_REPLY_SERIAL, (uint32_t) cookie); | |
405 | } | |
406 | } | |
407 | ||
6629161f | 408 | int bus_message_from_header( |
df2d202e | 409 | sd_bus *bus, |
2ac7c17f LP |
410 | void *header, |
411 | size_t header_accessible, | |
412 | void *footer, | |
413 | size_t footer_accessible, | |
414 | size_t message_size, | |
2c93b4ef LP |
415 | int *fds, |
416 | unsigned n_fds, | |
2571ead1 | 417 | const char *label, |
6629161f | 418 | size_t extra, |
2571ead1 LP |
419 | sd_bus_message **ret) { |
420 | ||
bcf88fc3 | 421 | _cleanup_free_ sd_bus_message *m = NULL; |
80a46c73 | 422 | struct bus_header *h; |
6629161f | 423 | size_t a, label_sz; |
80a46c73 | 424 | |
2a0958d2 | 425 | assert(bus); |
2ac7c17f LP |
426 | assert(header || header_accessible <= 0); |
427 | assert(footer || footer_accessible <= 0); | |
2c93b4ef | 428 | assert(fds || n_fds <= 0); |
80a46c73 LP |
429 | assert(ret); |
430 | ||
2ac7c17f | 431 | if (header_accessible < sizeof(struct bus_header)) |
80a46c73 LP |
432 | return -EBADMSG; |
433 | ||
2ac7c17f LP |
434 | if (header_accessible > message_size) |
435 | return -EBADMSG; | |
436 | if (footer_accessible > message_size) | |
80a46c73 LP |
437 | return -EBADMSG; |
438 | ||
2ac7c17f | 439 | h = header; |
bcf88fc3 | 440 | if (!IN_SET(h->version, 1, 2)) |
954871d8 KS |
441 | return -EBADMSG; |
442 | ||
80a46c73 LP |
443 | if (h->type == _SD_BUS_MESSAGE_TYPE_INVALID) |
444 | return -EBADMSG; | |
445 | ||
bcf88fc3 | 446 | if (!IN_SET(h->endian, BUS_LITTLE_ENDIAN, BUS_BIG_ENDIAN)) |
80a46c73 LP |
447 | return -EBADMSG; |
448 | ||
2ac7c17f LP |
449 | /* Note that we are happy with unknown flags in the flags header! */ |
450 | ||
6629161f | 451 | a = ALIGN(sizeof(sd_bus_message)) + ALIGN(extra); |
80a46c73 | 452 | |
2571ead1 LP |
453 | if (label) { |
454 | label_sz = strlen(label); | |
6629161f LP |
455 | a += label_sz + 1; |
456 | } | |
2571ead1 LP |
457 | |
458 | m = malloc0(a); | |
80a46c73 LP |
459 | if (!m) |
460 | return -ENOMEM; | |
461 | ||
462 | m->n_ref = 1; | |
2c93b4ef | 463 | m->sealed = true; |
2ac7c17f LP |
464 | m->header = header; |
465 | m->header_accessible = header_accessible; | |
466 | m->footer = footer; | |
467 | m->footer_accessible = footer_accessible; | |
468 | ||
469 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
470 | size_t ws; | |
471 | ||
472 | if (h->dbus2.cookie == 0) | |
473 | return -EBADMSG; | |
474 | ||
475 | /* dbus2 derives the sizes from the message size and | |
476 | the offset table at the end, since it is formatted as | |
477 | gvariant "yyyyuta{tv}v". Since the message itself is a | |
478 | structure with precisely to variable sized entries, | |
479 | there's only one offset in the table, which marks the | |
480 | end of the fields array. */ | |
481 | ||
482 | ws = bus_gvariant_determine_word_size(message_size, 0); | |
483 | if (footer_accessible < ws) | |
484 | return -EBADMSG; | |
485 | ||
486 | m->fields_size = bus_gvariant_read_word_le((uint8_t*) footer + footer_accessible - ws, ws); | |
487 | if (ALIGN8(m->fields_size) > message_size - ws) | |
488 | return -EBADMSG; | |
489 | if (m->fields_size < sizeof(struct bus_header)) | |
490 | return -EBADMSG; | |
491 | ||
492 | m->fields_size -= sizeof(struct bus_header); | |
493 | m->body_size = message_size - (sizeof(struct bus_header) + ALIGN8(m->fields_size)); | |
494 | } else { | |
495 | if (h->dbus1.serial == 0) | |
496 | return -EBADMSG; | |
497 | ||
498 | /* dbus1 has the sizes in the header */ | |
499 | m->fields_size = BUS_MESSAGE_BSWAP32(m, h->dbus1.fields_size); | |
500 | m->body_size = BUS_MESSAGE_BSWAP32(m, h->dbus1.body_size); | |
501 | ||
502 | if (sizeof(struct bus_header) + ALIGN8(m->fields_size) + m->body_size != message_size) | |
503 | return -EBADMSG; | |
504 | } | |
505 | ||
2c93b4ef LP |
506 | m->fds = fds; |
507 | m->n_fds = n_fds; | |
80a46c73 | 508 | |
2571ead1 | 509 | if (label) { |
5b12334d LP |
510 | m->creds.label = (char*) m + ALIGN(sizeof(sd_bus_message)) + ALIGN(extra); |
511 | memcpy(m->creds.label, label, label_sz + 1); | |
512 | ||
513 | m->creds.mask |= SD_BUS_CREDS_SELINUX_CONTEXT; | |
2571ead1 LP |
514 | } |
515 | ||
2a0958d2 | 516 | m->bus = sd_bus_ref(bus); |
6629161f | 517 | *ret = m; |
bcf88fc3 | 518 | m = NULL; |
2a0958d2 | 519 | |
6629161f LP |
520 | return 0; |
521 | } | |
522 | ||
523 | int bus_message_from_malloc( | |
df2d202e | 524 | sd_bus *bus, |
6629161f LP |
525 | void *buffer, |
526 | size_t length, | |
527 | int *fds, | |
528 | unsigned n_fds, | |
6629161f LP |
529 | const char *label, |
530 | sd_bus_message **ret) { | |
531 | ||
532 | sd_bus_message *m; | |
5461f53f | 533 | size_t sz; |
6629161f LP |
534 | int r; |
535 | ||
2ac7c17f LP |
536 | r = bus_message_from_header( |
537 | bus, | |
538 | buffer, length, /* in this case the initial bytes and the final bytes are the same */ | |
539 | buffer, length, | |
540 | length, | |
541 | fds, n_fds, | |
aa0d0ed6 | 542 | label, |
2ac7c17f | 543 | 0, &m); |
6629161f LP |
544 | if (r < 0) |
545 | return r; | |
546 | ||
2ac7c17f | 547 | sz = length - sizeof(struct bus_header) - ALIGN8(m->fields_size); |
5461f53f LP |
548 | if (sz > 0) { |
549 | m->n_body_parts = 1; | |
2ac7c17f | 550 | m->body.data = (uint8_t*) buffer + sizeof(struct bus_header) + ALIGN8(m->fields_size); |
5461f53f LP |
551 | m->body.size = sz; |
552 | m->body.sealed = true; | |
553 | m->body.memfd = -1; | |
554 | } | |
6629161f | 555 | |
80a46c73 | 556 | m->n_iovec = 1; |
bc7fd8cd | 557 | m->iovec = m->iovec_fixed; |
80a46c73 LP |
558 | m->iovec[0].iov_base = buffer; |
559 | m->iovec[0].iov_len = length; | |
560 | ||
6629161f | 561 | r = bus_message_parse_fields(m); |
2c93b4ef LP |
562 | if (r < 0) |
563 | goto fail; | |
564 | ||
565 | /* We take possession of the memory and fds now */ | |
566 | m->free_header = true; | |
567 | m->free_fds = true; | |
80a46c73 LP |
568 | |
569 | *ret = m; | |
570 | return 0; | |
2c93b4ef LP |
571 | |
572 | fail: | |
573 | message_free(m); | |
574 | return r; | |
80a46c73 LP |
575 | } |
576 | ||
75bcbcf2 SA |
577 | _public_ int sd_bus_message_new( |
578 | sd_bus *bus, | |
579 | sd_bus_message **m, | |
580 | uint8_t type) { | |
de1c301e | 581 | |
75bcbcf2 | 582 | sd_bus_message *t; |
2a0958d2 | 583 | |
75bcbcf2 SA |
584 | assert_return(bus, -ENOTCONN); |
585 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
586 | assert_return(m, -EINVAL); | |
de1c301e | 587 | |
75bcbcf2 SA |
588 | t = malloc0(ALIGN(sizeof(sd_bus_message)) + sizeof(struct bus_header)); |
589 | if (!t) | |
590 | return -ENOMEM; | |
591 | ||
592 | t->n_ref = 1; | |
593 | t->header = (struct bus_header*) ((uint8_t*) t + ALIGN(sizeof(struct sd_bus_message))); | |
594 | t->header->endian = BUS_NATIVE_ENDIAN; | |
595 | t->header->type = type; | |
596 | t->header->version = bus->message_version; | |
597 | t->allow_fds = bus->can_fds || !IN_SET(bus->state, BUS_HELLO, BUS_RUNNING); | |
598 | t->root_container.need_offsets = BUS_MESSAGE_IS_GVARIANT(t); | |
599 | t->bus = sd_bus_ref(bus); | |
9b05bc48 | 600 | |
c0765ddb | 601 | if (bus->allow_interactive_authorization) |
75bcbcf2 | 602 | t->header->flags |= BUS_MESSAGE_ALLOW_INTERACTIVE_AUTHORIZATION; |
c0765ddb | 603 | |
75bcbcf2 SA |
604 | *m = t; |
605 | return 0; | |
de1c301e LP |
606 | } |
607 | ||
d9f644e2 | 608 | _public_ int sd_bus_message_new_signal( |
de1c301e | 609 | sd_bus *bus, |
151b9b96 | 610 | sd_bus_message **m, |
de1c301e LP |
611 | const char *path, |
612 | const char *interface, | |
151b9b96 | 613 | const char *member) { |
de1c301e LP |
614 | |
615 | sd_bus_message *t; | |
616 | int r; | |
617 | ||
2a0958d2 LP |
618 | assert_return(bus, -ENOTCONN); |
619 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
9d6c7c82 LP |
620 | assert_return(object_path_is_valid(path), -EINVAL); |
621 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
622 | assert_return(member_name_is_valid(member), -EINVAL); | |
623 | assert_return(m, -EINVAL); | |
de1c301e | 624 | |
75bcbcf2 SA |
625 | r = sd_bus_message_new(bus, &t, SD_BUS_MESSAGE_SIGNAL); |
626 | if (r < 0) | |
de1c301e LP |
627 | return -ENOMEM; |
628 | ||
75bcbcf2 SA |
629 | assert(t); |
630 | ||
0461f8cd | 631 | t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
89ffcd2a | 632 | |
0461f8cd | 633 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path); |
de1c301e LP |
634 | if (r < 0) |
635 | goto fail; | |
0461f8cd | 636 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_INTERFACE, SD_BUS_TYPE_STRING, interface, &t->interface); |
de1c301e LP |
637 | if (r < 0) |
638 | goto fail; | |
0461f8cd | 639 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_MEMBER, SD_BUS_TYPE_STRING, member, &t->member); |
de1c301e LP |
640 | if (r < 0) |
641 | goto fail; | |
642 | ||
643 | *m = t; | |
644 | return 0; | |
645 | ||
646 | fail: | |
647 | sd_bus_message_unref(t); | |
648 | return r; | |
649 | } | |
650 | ||
d9f644e2 | 651 | _public_ int sd_bus_message_new_method_call( |
de1c301e | 652 | sd_bus *bus, |
151b9b96 | 653 | sd_bus_message **m, |
de1c301e LP |
654 | const char *destination, |
655 | const char *path, | |
656 | const char *interface, | |
151b9b96 | 657 | const char *member) { |
de1c301e LP |
658 | |
659 | sd_bus_message *t; | |
660 | int r; | |
661 | ||
2a0958d2 LP |
662 | assert_return(bus, -ENOTCONN); |
663 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
9d6c7c82 LP |
664 | assert_return(!destination || service_name_is_valid(destination), -EINVAL); |
665 | assert_return(object_path_is_valid(path), -EINVAL); | |
666 | assert_return(!interface || interface_name_is_valid(interface), -EINVAL); | |
667 | assert_return(member_name_is_valid(member), -EINVAL); | |
668 | assert_return(m, -EINVAL); | |
de1c301e | 669 | |
75bcbcf2 SA |
670 | r = sd_bus_message_new(bus, &t, SD_BUS_MESSAGE_METHOD_CALL); |
671 | if (r < 0) | |
de1c301e LP |
672 | return -ENOMEM; |
673 | ||
75bcbcf2 SA |
674 | assert(t); |
675 | ||
0461f8cd | 676 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path); |
de1c301e LP |
677 | if (r < 0) |
678 | goto fail; | |
0461f8cd | 679 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_MEMBER, SD_BUS_TYPE_STRING, member, &t->member); |
de1c301e LP |
680 | if (r < 0) |
681 | goto fail; | |
682 | ||
683 | if (interface) { | |
0461f8cd | 684 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_INTERFACE, SD_BUS_TYPE_STRING, interface, &t->interface); |
de1c301e LP |
685 | if (r < 0) |
686 | goto fail; | |
687 | } | |
688 | ||
689 | if (destination) { | |
0461f8cd | 690 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &t->destination); |
de1c301e LP |
691 | if (r < 0) |
692 | goto fail; | |
693 | } | |
694 | ||
695 | *m = t; | |
696 | return 0; | |
697 | ||
698 | fail: | |
699 | message_free(t); | |
700 | return r; | |
701 | } | |
702 | ||
5407f2de | 703 | static int message_new_reply( |
de1c301e | 704 | sd_bus_message *call, |
5407f2de | 705 | uint8_t type, |
de1c301e LP |
706 | sd_bus_message **m) { |
707 | ||
708 | sd_bus_message *t; | |
709 | int r; | |
710 | ||
9d6c7c82 LP |
711 | assert_return(call, -EINVAL); |
712 | assert_return(call->sealed, -EPERM); | |
713 | assert_return(call->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); | |
2a0958d2 | 714 | assert_return(call->bus->state != BUS_UNSET, -ENOTCONN); |
9d6c7c82 | 715 | assert_return(m, -EINVAL); |
de1c301e | 716 | |
75bcbcf2 SA |
717 | r = sd_bus_message_new(call->bus, &t, type); |
718 | if (r < 0) | |
de1c301e LP |
719 | return -ENOMEM; |
720 | ||
75bcbcf2 SA |
721 | assert(t); |
722 | ||
0461f8cd | 723 | t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
693eb9a2 | 724 | t->reply_cookie = BUS_MESSAGE_COOKIE(call); |
2ac7c17f | 725 | if (t->reply_cookie == 0) |
15411c0c | 726 | return -EOPNOTSUPP; |
b381de41 | 727 | |
b267a6d2 | 728 | r = message_append_reply_cookie(t, t->reply_cookie); |
de1c301e LP |
729 | if (r < 0) |
730 | goto fail; | |
731 | ||
732 | if (call->sender) { | |
0461f8cd | 733 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, call->sender, &t->destination); |
de1c301e LP |
734 | if (r < 0) |
735 | goto fail; | |
736 | } | |
737 | ||
0461f8cd | 738 | t->dont_send = !!(call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED); |
6717d473 | 739 | t->enforced_reply_signature = call->enforced_reply_signature; |
5407f2de | 740 | |
de1c301e | 741 | *m = t; |
89ffcd2a | 742 | return 0; |
de1c301e LP |
743 | |
744 | fail: | |
745 | message_free(t); | |
746 | return r; | |
747 | } | |
748 | ||
d9f644e2 | 749 | _public_ int sd_bus_message_new_method_return( |
5407f2de LP |
750 | sd_bus_message *call, |
751 | sd_bus_message **m) { | |
752 | ||
df2d202e | 753 | return message_new_reply(call, SD_BUS_MESSAGE_METHOD_RETURN, m); |
5407f2de LP |
754 | } |
755 | ||
d9f644e2 | 756 | _public_ int sd_bus_message_new_method_error( |
de1c301e | 757 | sd_bus_message *call, |
151b9b96 LP |
758 | sd_bus_message **m, |
759 | const sd_bus_error *e) { | |
de1c301e LP |
760 | |
761 | sd_bus_message *t; | |
762 | int r; | |
763 | ||
9d6c7c82 LP |
764 | assert_return(sd_bus_error_is_set(e), -EINVAL); |
765 | assert_return(m, -EINVAL); | |
de1c301e | 766 | |
df2d202e | 767 | r = message_new_reply(call, SD_BUS_MESSAGE_METHOD_ERROR, &t); |
de1c301e | 768 | if (r < 0) |
5407f2de | 769 | return r; |
de1c301e | 770 | |
0461f8cd | 771 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name); |
de1c301e LP |
772 | if (r < 0) |
773 | goto fail; | |
774 | ||
775 | if (e->message) { | |
776 | r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message); | |
777 | if (r < 0) | |
778 | goto fail; | |
779 | } | |
780 | ||
79f8d3d2 LP |
781 | t->error._need_free = -1; |
782 | ||
de1c301e LP |
783 | *m = t; |
784 | return 0; | |
785 | ||
786 | fail: | |
787 | message_free(t); | |
788 | return r; | |
789 | } | |
790 | ||
d9f644e2 | 791 | _public_ int sd_bus_message_new_method_errorf( |
29ddb38f LP |
792 | sd_bus_message *call, |
793 | sd_bus_message **m, | |
794 | const char *name, | |
795 | const char *format, | |
796 | ...) { | |
797 | ||
4afd3348 | 798 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
29ddb38f | 799 | va_list ap; |
29ddb38f | 800 | |
40ca29a1 LP |
801 | assert_return(name, -EINVAL); |
802 | assert_return(m, -EINVAL); | |
803 | ||
804 | va_start(ap, format); | |
780896a4 | 805 | bus_error_setfv(&error, name, format, ap); |
40ca29a1 | 806 | va_end(ap); |
29ddb38f | 807 | |
151b9b96 | 808 | return sd_bus_message_new_method_error(call, m, &error); |
40ca29a1 | 809 | } |
29ddb38f | 810 | |
d9f644e2 | 811 | _public_ int sd_bus_message_new_method_errno( |
40ca29a1 | 812 | sd_bus_message *call, |
151b9b96 | 813 | sd_bus_message **m, |
40ca29a1 | 814 | int error, |
151b9b96 | 815 | const sd_bus_error *p) { |
29ddb38f | 816 | |
4afd3348 | 817 | _cleanup_(sd_bus_error_free) sd_bus_error berror = SD_BUS_ERROR_NULL; |
29ddb38f | 818 | |
40ca29a1 | 819 | if (sd_bus_error_is_set(p)) |
151b9b96 | 820 | return sd_bus_message_new_method_error(call, m, p); |
29ddb38f | 821 | |
40ca29a1 | 822 | sd_bus_error_set_errno(&berror, error); |
29ddb38f | 823 | |
151b9b96 | 824 | return sd_bus_message_new_method_error(call, m, &berror); |
40ca29a1 | 825 | } |
29ddb38f | 826 | |
d9f644e2 | 827 | _public_ int sd_bus_message_new_method_errnof( |
40ca29a1 LP |
828 | sd_bus_message *call, |
829 | sd_bus_message **m, | |
830 | int error, | |
831 | const char *format, | |
832 | ...) { | |
833 | ||
4afd3348 | 834 | _cleanup_(sd_bus_error_free) sd_bus_error berror = SD_BUS_ERROR_NULL; |
40ca29a1 | 835 | va_list ap; |
40ca29a1 LP |
836 | |
837 | va_start(ap, format); | |
07a0d22f | 838 | sd_bus_error_set_errnofv(&berror, error, format, ap); |
40ca29a1 LP |
839 | va_end(ap); |
840 | ||
151b9b96 | 841 | return sd_bus_message_new_method_error(call, m, &berror); |
29ddb38f LP |
842 | } |
843 | ||
d29ae291 LP |
844 | void bus_message_set_sender_local(sd_bus *bus, sd_bus_message *m) { |
845 | assert(bus); | |
846 | assert(m); | |
847 | ||
848 | m->sender = m->creds.unique_name = (char*) "org.freedesktop.DBus.Local"; | |
849 | m->creds.well_known_names_local = true; | |
850 | m->creds.mask |= (SD_BUS_CREDS_UNIQUE_NAME|SD_BUS_CREDS_WELL_KNOWN_NAMES) & bus->creds_mask; | |
851 | } | |
852 | ||
853 | void bus_message_set_sender_driver(sd_bus *bus, sd_bus_message *m) { | |
854 | assert(bus); | |
855 | assert(m); | |
856 | ||
857 | m->sender = m->creds.unique_name = (char*) "org.freedesktop.DBus"; | |
858 | m->creds.well_known_names_driver = true; | |
859 | m->creds.mask |= (SD_BUS_CREDS_UNIQUE_NAME|SD_BUS_CREDS_WELL_KNOWN_NAMES) & bus->creds_mask; | |
860 | } | |
861 | ||
eb01ba5d LP |
862 | int bus_message_new_synthetic_error( |
863 | sd_bus *bus, | |
693eb9a2 | 864 | uint64_t cookie, |
eb01ba5d LP |
865 | const sd_bus_error *e, |
866 | sd_bus_message **m) { | |
867 | ||
868 | sd_bus_message *t; | |
869 | int r; | |
870 | ||
2a0958d2 | 871 | assert(bus); |
eb01ba5d LP |
872 | assert(sd_bus_error_is_set(e)); |
873 | assert(m); | |
874 | ||
75bcbcf2 SA |
875 | r = sd_bus_message_new(bus, &t, SD_BUS_MESSAGE_METHOD_ERROR); |
876 | if (r < 0) | |
eb01ba5d LP |
877 | return -ENOMEM; |
878 | ||
75bcbcf2 SA |
879 | assert(t); |
880 | ||
0461f8cd | 881 | t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
693eb9a2 | 882 | t->reply_cookie = cookie; |
eb01ba5d | 883 | |
b267a6d2 | 884 | r = message_append_reply_cookie(t, t->reply_cookie); |
eb01ba5d LP |
885 | if (r < 0) |
886 | goto fail; | |
887 | ||
888 | if (bus && bus->unique_name) { | |
0461f8cd | 889 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, bus->unique_name, &t->destination); |
eb01ba5d LP |
890 | if (r < 0) |
891 | goto fail; | |
892 | } | |
893 | ||
0461f8cd | 894 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name); |
3a7d4f1b LP |
895 | if (r < 0) |
896 | goto fail; | |
897 | ||
898 | if (e->message) { | |
899 | r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message); | |
900 | if (r < 0) | |
901 | goto fail; | |
902 | } | |
903 | ||
79f8d3d2 LP |
904 | t->error._need_free = -1; |
905 | ||
d29ae291 LP |
906 | bus_message_set_sender_driver(bus, t); |
907 | ||
eb01ba5d LP |
908 | *m = t; |
909 | return 0; | |
910 | ||
911 | fail: | |
912 | message_free(t); | |
913 | return r; | |
914 | } | |
915 | ||
d9f644e2 | 916 | _public_ sd_bus_message* sd_bus_message_ref(sd_bus_message *m) { |
4afd3348 LP |
917 | |
918 | if (!m) | |
919 | return NULL; | |
de1c301e LP |
920 | |
921 | assert(m->n_ref > 0); | |
922 | m->n_ref++; | |
923 | ||
924 | return m; | |
925 | } | |
926 | ||
d9f644e2 | 927 | _public_ sd_bus_message* sd_bus_message_unref(sd_bus_message *m) { |
5b1bc83f LP |
928 | |
929 | if (!m) | |
930 | return NULL; | |
de1c301e LP |
931 | |
932 | assert(m->n_ref > 0); | |
933 | m->n_ref--; | |
934 | ||
b5eca3a2 LP |
935 | if (m->n_ref > 0) |
936 | return NULL; | |
de1c301e | 937 | |
b5eca3a2 | 938 | message_free(m); |
de1c301e LP |
939 | return NULL; |
940 | } | |
941 | ||
d9f644e2 | 942 | _public_ int sd_bus_message_get_type(sd_bus_message *m, uint8_t *type) { |
9d6c7c82 LP |
943 | assert_return(m, -EINVAL); |
944 | assert_return(type, -EINVAL); | |
de1c301e LP |
945 | |
946 | *type = m->header->type; | |
947 | return 0; | |
948 | } | |
949 | ||
693eb9a2 | 950 | _public_ int sd_bus_message_get_cookie(sd_bus_message *m, uint64_t *cookie) { |
2ac7c17f LP |
951 | uint64_t c; |
952 | ||
9d6c7c82 | 953 | assert_return(m, -EINVAL); |
693eb9a2 | 954 | assert_return(cookie, -EINVAL); |
2ac7c17f LP |
955 | |
956 | c = BUS_MESSAGE_COOKIE(m); | |
957 | if (c == 0) | |
958 | return -ENODATA; | |
de1c301e | 959 | |
693eb9a2 | 960 | *cookie = BUS_MESSAGE_COOKIE(m); |
de1c301e LP |
961 | return 0; |
962 | } | |
963 | ||
693eb9a2 | 964 | _public_ int sd_bus_message_get_reply_cookie(sd_bus_message *m, uint64_t *cookie) { |
9d6c7c82 | 965 | assert_return(m, -EINVAL); |
693eb9a2 | 966 | assert_return(cookie, -EINVAL); |
2ac7c17f LP |
967 | |
968 | if (m->reply_cookie == 0) | |
969 | return -ENODATA; | |
de1c301e | 970 | |
693eb9a2 | 971 | *cookie = m->reply_cookie; |
de1c301e LP |
972 | return 0; |
973 | } | |
974 | ||
eee9ec0e | 975 | _public_ int sd_bus_message_get_expect_reply(sd_bus_message *m) { |
9d6c7c82 | 976 | assert_return(m, -EINVAL); |
de1c301e | 977 | |
eee9ec0e LP |
978 | return m->header->type == SD_BUS_MESSAGE_METHOD_CALL && |
979 | !(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED); | |
de1c301e LP |
980 | } |
981 | ||
eee9ec0e | 982 | _public_ int sd_bus_message_get_auto_start(sd_bus_message *m) { |
1fee9de5 LP |
983 | assert_return(m, -EINVAL); |
984 | ||
eee9ec0e | 985 | return !(m->header->flags & BUS_MESSAGE_NO_AUTO_START); |
1fee9de5 LP |
986 | } |
987 | ||
53a83f4b LP |
988 | _public_ int sd_bus_message_get_allow_interactive_authorization(sd_bus_message *m) { |
989 | assert_return(m, -EINVAL); | |
990 | ||
991 | return m->header->type == SD_BUS_MESSAGE_METHOD_CALL && | |
992 | (m->header->flags & BUS_MESSAGE_ALLOW_INTERACTIVE_AUTHORIZATION); | |
993 | } | |
994 | ||
d9f644e2 | 995 | _public_ const char *sd_bus_message_get_path(sd_bus_message *m) { |
9d6c7c82 | 996 | assert_return(m, NULL); |
de1c301e LP |
997 | |
998 | return m->path; | |
999 | } | |
1000 | ||
d9f644e2 | 1001 | _public_ const char *sd_bus_message_get_interface(sd_bus_message *m) { |
9d6c7c82 | 1002 | assert_return(m, NULL); |
de1c301e LP |
1003 | |
1004 | return m->interface; | |
1005 | } | |
1006 | ||
d9f644e2 | 1007 | _public_ const char *sd_bus_message_get_member(sd_bus_message *m) { |
9d6c7c82 | 1008 | assert_return(m, NULL); |
de1c301e LP |
1009 | |
1010 | return m->member; | |
1011 | } | |
d9f644e2 ZJS |
1012 | |
1013 | _public_ const char *sd_bus_message_get_destination(sd_bus_message *m) { | |
9d6c7c82 | 1014 | assert_return(m, NULL); |
de1c301e LP |
1015 | |
1016 | return m->destination; | |
1017 | } | |
1018 | ||
d9f644e2 | 1019 | _public_ const char *sd_bus_message_get_sender(sd_bus_message *m) { |
9d6c7c82 | 1020 | assert_return(m, NULL); |
de1c301e LP |
1021 | |
1022 | return m->sender; | |
1023 | } | |
1024 | ||
d9f644e2 | 1025 | _public_ const sd_bus_error *sd_bus_message_get_error(sd_bus_message *m) { |
9d6c7c82 | 1026 | assert_return(m, NULL); |
f02b9615 LP |
1027 | |
1028 | if (!sd_bus_error_is_set(&m->error)) | |
1029 | return NULL; | |
de1c301e LP |
1030 | |
1031 | return &m->error; | |
1032 | } | |
1033 | ||
1fedcf59 | 1034 | _public_ int sd_bus_message_get_monotonic_usec(sd_bus_message *m, uint64_t *usec) { |
9d6c7c82 LP |
1035 | assert_return(m, -EINVAL); |
1036 | assert_return(usec, -EINVAL); | |
1fedcf59 LP |
1037 | |
1038 | if (m->monotonic <= 0) | |
1039 | return -ENODATA; | |
acb5a3cb | 1040 | |
69aec65c | 1041 | *usec = m->monotonic; |
acb5a3cb LP |
1042 | return 0; |
1043 | } | |
1044 | ||
1fedcf59 | 1045 | _public_ int sd_bus_message_get_realtime_usec(sd_bus_message *m, uint64_t *usec) { |
9d6c7c82 LP |
1046 | assert_return(m, -EINVAL); |
1047 | assert_return(usec, -EINVAL); | |
1fedcf59 LP |
1048 | |
1049 | if (m->realtime <= 0) | |
1050 | return -ENODATA; | |
69aec65c LP |
1051 | |
1052 | *usec = m->realtime; | |
1053 | return 0; | |
1054 | } | |
1055 | ||
6a0e376c LP |
1056 | _public_ int sd_bus_message_get_seqnum(sd_bus_message *m, uint64_t *seqnum) { |
1057 | assert_return(m, -EINVAL); | |
1058 | assert_return(seqnum, -EINVAL); | |
1fedcf59 LP |
1059 | |
1060 | if (m->seqnum <= 0) | |
1061 | return -ENODATA; | |
6a0e376c LP |
1062 | |
1063 | *seqnum = m->seqnum; | |
1064 | return 0; | |
1065 | } | |
1066 | ||
5b12334d LP |
1067 | _public_ sd_bus_creds *sd_bus_message_get_creds(sd_bus_message *m) { |
1068 | assert_return(m, NULL); | |
102ea8e4 | 1069 | |
5b12334d LP |
1070 | if (m->creds.mask == 0) |
1071 | return NULL; | |
102ea8e4 | 1072 | |
5b12334d | 1073 | return &m->creds; |
102ea8e4 LP |
1074 | } |
1075 | ||
2ac7c17f LP |
1076 | _public_ int sd_bus_message_is_signal( |
1077 | sd_bus_message *m, | |
1078 | const char *interface, | |
1079 | const char *member) { | |
1080 | ||
9d6c7c82 | 1081 | assert_return(m, -EINVAL); |
de1c301e | 1082 | |
40ca29a1 | 1083 | if (m->header->type != SD_BUS_MESSAGE_SIGNAL) |
de1c301e LP |
1084 | return 0; |
1085 | ||
1086 | if (interface && (!m->interface || !streq(m->interface, interface))) | |
1087 | return 0; | |
1088 | ||
1089 | if (member && (!m->member || !streq(m->member, member))) | |
1090 | return 0; | |
1091 | ||
1092 | return 1; | |
1093 | } | |
1094 | ||
2ac7c17f LP |
1095 | _public_ int sd_bus_message_is_method_call( |
1096 | sd_bus_message *m, | |
1097 | const char *interface, | |
1098 | const char *member) { | |
1099 | ||
9d6c7c82 | 1100 | assert_return(m, -EINVAL); |
de1c301e | 1101 | |
40ca29a1 | 1102 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
de1c301e LP |
1103 | return 0; |
1104 | ||
1105 | if (interface && (!m->interface || !streq(m->interface, interface))) | |
1106 | return 0; | |
1107 | ||
1108 | if (member && (!m->member || !streq(m->member, member))) | |
1109 | return 0; | |
1110 | ||
1111 | return 1; | |
1112 | } | |
1113 | ||
d9f644e2 | 1114 | _public_ int sd_bus_message_is_method_error(sd_bus_message *m, const char *name) { |
9d6c7c82 | 1115 | assert_return(m, -EINVAL); |
de1c301e | 1116 | |
40ca29a1 | 1117 | if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) |
de1c301e LP |
1118 | return 0; |
1119 | ||
1120 | if (name && (!m->error.name || !streq(m->error.name, name))) | |
1121 | return 0; | |
1122 | ||
1123 | return 1; | |
1124 | } | |
1125 | ||
eee9ec0e | 1126 | _public_ int sd_bus_message_set_expect_reply(sd_bus_message *m, int b) { |
9d6c7c82 LP |
1127 | assert_return(m, -EINVAL); |
1128 | assert_return(!m->sealed, -EPERM); | |
1129 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EPERM); | |
de1c301e | 1130 | |
5883ff60 | 1131 | SET_FLAG(m->header->flags, BUS_MESSAGE_NO_REPLY_EXPECTED, !b); |
de1c301e LP |
1132 | |
1133 | return 0; | |
1134 | } | |
1135 | ||
eee9ec0e | 1136 | _public_ int sd_bus_message_set_auto_start(sd_bus_message *m, int b) { |
1fee9de5 LP |
1137 | assert_return(m, -EINVAL); |
1138 | assert_return(!m->sealed, -EPERM); | |
1139 | ||
5883ff60 | 1140 | SET_FLAG(m->header->flags, BUS_MESSAGE_NO_AUTO_START, !b); |
1fee9de5 LP |
1141 | |
1142 | return 0; | |
1143 | } | |
1144 | ||
53a83f4b LP |
1145 | _public_ int sd_bus_message_set_allow_interactive_authorization(sd_bus_message *m, int b) { |
1146 | assert_return(m, -EINVAL); | |
1147 | assert_return(!m->sealed, -EPERM); | |
1148 | ||
5883ff60 | 1149 | SET_FLAG(m->header->flags, BUS_MESSAGE_ALLOW_INTERACTIVE_AUTHORIZATION, b); |
53a83f4b LP |
1150 | |
1151 | return 0; | |
1152 | } | |
1153 | ||
de1c301e LP |
1154 | static struct bus_container *message_get_container(sd_bus_message *m) { |
1155 | assert(m); | |
1156 | ||
1157 | if (m->n_containers == 0) | |
1158 | return &m->root_container; | |
1159 | ||
9a17484d LP |
1160 | assert(m->containers); |
1161 | return m->containers + m->n_containers - 1; | |
de1c301e LP |
1162 | } |
1163 | ||
bc7fd8cd LP |
1164 | struct bus_body_part *message_append_part(sd_bus_message *m) { |
1165 | struct bus_body_part *part; | |
1166 | ||
1167 | assert(m); | |
35460afc LP |
1168 | |
1169 | if (m->poisoned) | |
1170 | return NULL; | |
bc7fd8cd LP |
1171 | |
1172 | if (m->n_body_parts <= 0) { | |
1173 | part = &m->body; | |
1174 | zero(*part); | |
1175 | } else { | |
1176 | assert(m->body_end); | |
1177 | ||
1178 | part = new0(struct bus_body_part, 1); | |
1179 | if (!part) { | |
1180 | m->poisoned = true; | |
1181 | return NULL; | |
1182 | } | |
1183 | ||
1184 | m->body_end->next = part; | |
1185 | } | |
1186 | ||
1187 | part->memfd = -1; | |
1188 | m->body_end = part; | |
313cefa1 | 1189 | m->n_body_parts++; |
bc7fd8cd LP |
1190 | |
1191 | return part; | |
1192 | } | |
1193 | ||
1194 | static void part_zero(struct bus_body_part *part, size_t sz) { | |
1195 | assert(part); | |
1196 | assert(sz > 0); | |
1197 | assert(sz < 8); | |
1198 | ||
453a0c29 LP |
1199 | /* All other fields can be left in their defaults */ |
1200 | assert(!part->data); | |
1201 | assert(part->memfd < 0); | |
1202 | ||
bc7fd8cd | 1203 | part->size = sz; |
453a0c29 LP |
1204 | part->is_zero = true; |
1205 | part->sealed = true; | |
bc7fd8cd LP |
1206 | } |
1207 | ||
1208 | static int part_make_space( | |
1209 | struct sd_bus_message *m, | |
1210 | struct bus_body_part *part, | |
1211 | size_t sz, | |
1212 | void **q) { | |
1213 | ||
1214 | void *n; | |
bc7fd8cd LP |
1215 | |
1216 | assert(m); | |
1217 | assert(part); | |
1218 | assert(!part->sealed); | |
1219 | ||
1220 | if (m->poisoned) | |
1221 | return -ENOMEM; | |
1222 | ||
a132bef0 ZJS |
1223 | if (part->allocated == 0 || sz > part->allocated) { |
1224 | size_t new_allocated; | |
bc7fd8cd | 1225 | |
a132bef0 ZJS |
1226 | new_allocated = sz > 0 ? 2 * sz : 64; |
1227 | n = realloc(part->data, new_allocated); | |
1228 | if (!n) { | |
1229 | m->poisoned = true; | |
1230 | return -ENOMEM; | |
bc7fd8cd | 1231 | } |
bf30e48f | 1232 | |
a132bef0 ZJS |
1233 | part->data = n; |
1234 | part->allocated = new_allocated; | |
1235 | part->free_this = true; | |
bc7fd8cd LP |
1236 | } |
1237 | ||
1238 | if (q) | |
1239 | *q = part->data ? (uint8_t*) part->data + part->size : NULL; | |
1240 | ||
1241 | part->size = sz; | |
1242 | return 0; | |
1243 | } | |
1244 | ||
c1b9d935 LP |
1245 | static int message_add_offset(sd_bus_message *m, size_t offset) { |
1246 | struct bus_container *c; | |
1247 | ||
1248 | assert(m); | |
6647dc66 | 1249 | assert(BUS_MESSAGE_IS_GVARIANT(m)); |
c1b9d935 LP |
1250 | |
1251 | /* Add offset to current container, unless this is the first | |
1252 | * item in it, which will have the 0 offset, which we can | |
1253 | * ignore. */ | |
1254 | c = message_get_container(m); | |
1255 | ||
1256 | if (!c->need_offsets) | |
1257 | return 0; | |
1258 | ||
306f07be | 1259 | if (!GREEDY_REALLOC(c->offsets, c->offsets_allocated, c->n_offsets + 1)) |
c1b9d935 LP |
1260 | return -ENOMEM; |
1261 | ||
1262 | c->offsets[c->n_offsets++] = offset; | |
1263 | return 0; | |
1264 | } | |
1265 | ||
453a0c29 | 1266 | static void message_extend_containers(sd_bus_message *m, size_t expand) { |
de1c301e | 1267 | struct bus_container *c; |
453a0c29 LP |
1268 | |
1269 | assert(m); | |
1270 | ||
1271 | if (expand <= 0) | |
1272 | return; | |
1273 | ||
1274 | /* Update counters */ | |
c1b9d935 LP |
1275 | for (c = m->containers; c < m->containers + m->n_containers; c++) { |
1276 | ||
453a0c29 LP |
1277 | if (c->array_size) |
1278 | *c->array_size += expand; | |
c1b9d935 | 1279 | } |
453a0c29 LP |
1280 | } |
1281 | ||
2ac7c17f LP |
1282 | static void *message_extend_body( |
1283 | sd_bus_message *m, | |
1284 | size_t align, | |
1285 | size_t sz, | |
1286 | bool add_offset, | |
1287 | bool force_inline) { | |
1288 | ||
f3097697 | 1289 | size_t start_body, end_body, padding, added; |
bc7fd8cd LP |
1290 | void *p; |
1291 | int r; | |
de1c301e LP |
1292 | |
1293 | assert(m); | |
9a17484d | 1294 | assert(align > 0); |
bc7fd8cd | 1295 | assert(!m->sealed); |
35460afc LP |
1296 | |
1297 | if (m->poisoned) | |
1298 | return NULL; | |
de1c301e | 1299 | |
2ac7c17f | 1300 | start_body = ALIGN_TO((size_t) m->body_size, align); |
bc7fd8cd LP |
1301 | end_body = start_body + sz; |
1302 | ||
2ac7c17f | 1303 | padding = start_body - m->body_size; |
bc7fd8cd LP |
1304 | added = padding + sz; |
1305 | ||
1306 | /* Check for 32bit overflows */ | |
2ac7c17f LP |
1307 | if (end_body > (size_t) ((uint32_t) -1) || |
1308 | end_body < start_body) { | |
bc7fd8cd | 1309 | m->poisoned = true; |
de1c301e | 1310 | return NULL; |
bc7fd8cd | 1311 | } |
de1c301e | 1312 | |
f3097697 LP |
1313 | if (added > 0) { |
1314 | struct bus_body_part *part = NULL; | |
1315 | bool add_new_part; | |
1316 | ||
1317 | add_new_part = | |
1318 | m->n_body_parts <= 0 || | |
1319 | m->body_end->sealed || | |
2ac7c17f LP |
1320 | (padding != ALIGN_TO(m->body_end->size, align) - m->body_end->size) || |
1321 | (force_inline && m->body_end->size > MEMFD_MIN_SIZE); /* if this must be an inlined extension, let's create a new part if the previous part is large enough to be inlined */ | |
f3097697 LP |
1322 | |
1323 | if (add_new_part) { | |
1324 | if (padding > 0) { | |
1325 | part = message_append_part(m); | |
1326 | if (!part) | |
1327 | return NULL; | |
1328 | ||
1329 | part_zero(part, padding); | |
1330 | } | |
de1c301e | 1331 | |
bc7fd8cd LP |
1332 | part = message_append_part(m); |
1333 | if (!part) | |
1334 | return NULL; | |
1335 | ||
f3097697 LP |
1336 | r = part_make_space(m, part, sz, &p); |
1337 | if (r < 0) | |
1338 | return NULL; | |
1339 | } else { | |
1340 | struct bus_container *c; | |
1341 | void *op; | |
1342 | size_t os, start_part, end_part; | |
bc7fd8cd | 1343 | |
f3097697 LP |
1344 | part = m->body_end; |
1345 | op = part->data; | |
1346 | os = part->size; | |
bc7fd8cd | 1347 | |
f3097697 LP |
1348 | start_part = ALIGN_TO(part->size, align); |
1349 | end_part = start_part + sz; | |
bc7fd8cd | 1350 | |
f3097697 LP |
1351 | r = part_make_space(m, part, end_part, &p); |
1352 | if (r < 0) | |
1353 | return NULL; | |
bc7fd8cd | 1354 | |
f3097697 | 1355 | if (padding > 0) { |
29804cc1 | 1356 | memzero(p, padding); |
f3097697 LP |
1357 | p = (uint8_t*) p + padding; |
1358 | } | |
bc7fd8cd | 1359 | |
f3097697 LP |
1360 | /* Readjust pointers */ |
1361 | for (c = m->containers; c < m->containers + m->n_containers; c++) | |
1362 | c->array_size = adjust_pointer(c->array_size, op, os, part->data); | |
bc7fd8cd | 1363 | |
f3097697 | 1364 | m->error.message = (const char*) adjust_pointer(m->error.message, op, os, part->data); |
de1c301e | 1365 | } |
f3097697 LP |
1366 | } else |
1367 | /* Return something that is not NULL and is aligned */ | |
1368 | p = (uint8_t *) NULL + align; | |
de1c301e | 1369 | |
2ac7c17f | 1370 | m->body_size = end_body; |
453a0c29 | 1371 | message_extend_containers(m, added); |
de1c301e | 1372 | |
c1b9d935 LP |
1373 | if (add_offset) { |
1374 | r = message_add_offset(m, end_body); | |
1375 | if (r < 0) { | |
1376 | m->poisoned = true; | |
1377 | return NULL; | |
1378 | } | |
1379 | } | |
1380 | ||
de1c301e LP |
1381 | return p; |
1382 | } | |
1383 | ||
c1b9d935 LP |
1384 | static int message_push_fd(sd_bus_message *m, int fd) { |
1385 | int *f, copy; | |
1386 | ||
1387 | assert(m); | |
1388 | ||
1389 | if (fd < 0) | |
1390 | return -EINVAL; | |
1391 | ||
1392 | if (!m->allow_fds) | |
15411c0c | 1393 | return -EOPNOTSUPP; |
c1b9d935 LP |
1394 | |
1395 | copy = fcntl(fd, F_DUPFD_CLOEXEC, 3); | |
1396 | if (copy < 0) | |
1397 | return -errno; | |
1398 | ||
1399 | f = realloc(m->fds, sizeof(int) * (m->n_fds + 1)); | |
1400 | if (!f) { | |
1401 | m->poisoned = true; | |
03e334a1 | 1402 | safe_close(copy); |
c1b9d935 LP |
1403 | return -ENOMEM; |
1404 | } | |
1405 | ||
1406 | m->fds = f; | |
1407 | m->fds[m->n_fds] = copy; | |
1408 | m->free_fds = true; | |
1409 | ||
1410 | return copy; | |
1411 | } | |
1412 | ||
de1c301e | 1413 | int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored) { |
c1b9d935 | 1414 | _cleanup_close_ int fd = -1; |
de1c301e | 1415 | struct bus_container *c; |
27f6e5c7 | 1416 | ssize_t align, sz; |
de1c301e | 1417 | void *a; |
de1c301e | 1418 | |
9d6c7c82 | 1419 | assert_return(m, -EINVAL); |
9d6c7c82 LP |
1420 | assert_return(!m->sealed, -EPERM); |
1421 | assert_return(bus_type_is_basic(type), -EINVAL); | |
1422 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
1423 | |
1424 | c = message_get_container(m); | |
1425 | ||
1426 | if (c->signature && c->signature[c->index]) { | |
1427 | /* Container signature is already set */ | |
1428 | ||
1429 | if (c->signature[c->index] != type) | |
9a17484d | 1430 | return -ENXIO; |
de1c301e | 1431 | } else { |
5cbe7492 LP |
1432 | char *e; |
1433 | ||
ad67ef27 | 1434 | /* Maybe we can append to the signature? But only if this is the top-level container */ |
de1c301e | 1435 | if (c->enclosing != 0) |
9a17484d | 1436 | return -ENXIO; |
de1c301e LP |
1437 | |
1438 | e = strextend(&c->signature, CHAR_TO_STR(type), NULL); | |
bc7fd8cd LP |
1439 | if (!e) { |
1440 | m->poisoned = true; | |
de1c301e | 1441 | return -ENOMEM; |
bc7fd8cd | 1442 | } |
de1c301e LP |
1443 | } |
1444 | ||
6647dc66 | 1445 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 LP |
1446 | uint8_t u8; |
1447 | uint32_t u32; | |
de1c301e | 1448 | |
c1b9d935 | 1449 | switch (type) { |
cd6f997f | 1450 | |
c1b9d935 LP |
1451 | case SD_BUS_TYPE_SIGNATURE: |
1452 | case SD_BUS_TYPE_STRING: | |
1453 | p = strempty(p); | |
b8beb278 | 1454 | |
c1b9d935 LP |
1455 | /* Fall through... */ |
1456 | case SD_BUS_TYPE_OBJECT_PATH: | |
1457 | if (!p) | |
1458 | return -EINVAL; | |
cd6f997f | 1459 | |
c1b9d935 LP |
1460 | align = 1; |
1461 | sz = strlen(p) + 1; | |
1462 | break; | |
de1c301e | 1463 | |
c1b9d935 | 1464 | case SD_BUS_TYPE_BOOLEAN: |
b8beb278 | 1465 | |
c1b9d935 LP |
1466 | u8 = p && *(int*) p; |
1467 | p = &u8; | |
cd6f997f | 1468 | |
c1b9d935 LP |
1469 | align = sz = 1; |
1470 | break; | |
de1c301e | 1471 | |
c1b9d935 | 1472 | case SD_BUS_TYPE_UNIX_FD: |
b3273daf | 1473 | |
c1b9d935 LP |
1474 | if (!p) |
1475 | return -EINVAL; | |
15912917 | 1476 | |
c1b9d935 LP |
1477 | fd = message_push_fd(m, *(int*) p); |
1478 | if (fd < 0) | |
1479 | return fd; | |
de1c301e | 1480 | |
c1b9d935 LP |
1481 | u32 = m->n_fds; |
1482 | p = &u32; | |
de1c301e | 1483 | |
c1b9d935 LP |
1484 | align = sz = 4; |
1485 | break; | |
2c93b4ef | 1486 | |
c1b9d935 LP |
1487 | default: |
1488 | align = bus_gvariant_get_alignment(CHAR_TO_STR(type)); | |
6647dc66 | 1489 | sz = bus_gvariant_get_size(CHAR_TO_STR(type)); |
c1b9d935 | 1490 | break; |
15912917 KS |
1491 | } |
1492 | ||
c1b9d935 LP |
1493 | assert(align > 0); |
1494 | assert(sz > 0); | |
2c93b4ef | 1495 | |
2ac7c17f | 1496 | a = message_extend_body(m, align, sz, true, false); |
c1b9d935 LP |
1497 | if (!a) |
1498 | return -ENOMEM; | |
2c93b4ef | 1499 | |
c1b9d935 | 1500 | memcpy(a, p, sz); |
2c93b4ef | 1501 | |
c1b9d935 LP |
1502 | if (stored) |
1503 | *stored = (const uint8_t*) a; | |
2c93b4ef | 1504 | |
c1b9d935 LP |
1505 | } else { |
1506 | uint32_t u32; | |
2c93b4ef | 1507 | |
c1b9d935 | 1508 | switch (type) { |
2c93b4ef | 1509 | |
c1b9d935 LP |
1510 | case SD_BUS_TYPE_STRING: |
1511 | /* To make things easy we'll serialize a NULL string | |
1512 | * into the empty string */ | |
1513 | p = strempty(p); | |
b3273daf | 1514 | |
c1b9d935 LP |
1515 | /* Fall through... */ |
1516 | case SD_BUS_TYPE_OBJECT_PATH: | |
de1c301e | 1517 | |
c1b9d935 LP |
1518 | if (!p) |
1519 | return -EINVAL; | |
de1c301e | 1520 | |
c1b9d935 LP |
1521 | align = 4; |
1522 | sz = 4 + strlen(p) + 1; | |
1523 | break; | |
de1c301e | 1524 | |
c1b9d935 | 1525 | case SD_BUS_TYPE_SIGNATURE: |
de1c301e | 1526 | |
c1b9d935 | 1527 | p = strempty(p); |
de1c301e | 1528 | |
c1b9d935 LP |
1529 | align = 1; |
1530 | sz = 1 + strlen(p) + 1; | |
1531 | break; | |
de1c301e | 1532 | |
c1b9d935 | 1533 | case SD_BUS_TYPE_BOOLEAN: |
2c93b4ef | 1534 | |
c1b9d935 | 1535 | u32 = p && *(int*) p; |
6647dc66 LP |
1536 | p = &u32; |
1537 | ||
c1b9d935 LP |
1538 | align = sz = 4; |
1539 | break; | |
2c93b4ef | 1540 | |
c1b9d935 | 1541 | case SD_BUS_TYPE_UNIX_FD: |
de1c301e | 1542 | |
c1b9d935 LP |
1543 | if (!p) |
1544 | return -EINVAL; | |
de1c301e | 1545 | |
c1b9d935 LP |
1546 | fd = message_push_fd(m, *(int*) p); |
1547 | if (fd < 0) | |
1548 | return fd; | |
1549 | ||
1550 | u32 = m->n_fds; | |
1551 | p = &u32; | |
1552 | ||
1553 | align = sz = 4; | |
1554 | break; | |
1555 | ||
1556 | default: | |
1557 | align = bus_type_get_alignment(type); | |
1558 | sz = bus_type_get_size(type); | |
1559 | break; | |
1560 | } | |
1561 | ||
1562 | assert(align > 0); | |
1563 | assert(sz > 0); | |
1564 | ||
2ac7c17f | 1565 | a = message_extend_body(m, align, sz, false, false); |
c1b9d935 LP |
1566 | if (!a) |
1567 | return -ENOMEM; | |
1568 | ||
945c2931 | 1569 | if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH)) { |
c1b9d935 LP |
1570 | *(uint32_t*) a = sz - 5; |
1571 | memcpy((uint8_t*) a + 4, p, sz - 4); | |
1572 | ||
1573 | if (stored) | |
1574 | *stored = (const uint8_t*) a + 4; | |
1575 | ||
1576 | } else if (type == SD_BUS_TYPE_SIGNATURE) { | |
ec260edc | 1577 | *(uint8_t*) a = sz - 2; |
c1b9d935 LP |
1578 | memcpy((uint8_t*) a + 1, p, sz - 1); |
1579 | ||
1580 | if (stored) | |
1581 | *stored = (const uint8_t*) a + 1; | |
1582 | } else { | |
1583 | memcpy(a, p, sz); | |
1584 | ||
1585 | if (stored) | |
1586 | *stored = a; | |
1587 | } | |
de1c301e LP |
1588 | } |
1589 | ||
c1b9d935 | 1590 | if (type == SD_BUS_TYPE_UNIX_FD) |
313cefa1 | 1591 | m->n_fds++; |
c1b9d935 | 1592 | |
de1c301e | 1593 | if (c->enclosing != SD_BUS_TYPE_ARRAY) |
9a17484d | 1594 | c->index++; |
de1c301e | 1595 | |
c1b9d935 | 1596 | fd = -1; |
de1c301e LP |
1597 | return 0; |
1598 | } | |
1599 | ||
d9f644e2 | 1600 | _public_ int sd_bus_message_append_basic(sd_bus_message *m, char type, const void *p) { |
de1c301e LP |
1601 | return message_append_basic(m, type, p, NULL); |
1602 | } | |
1603 | ||
938bcbab LP |
1604 | _public_ int sd_bus_message_append_string_space( |
1605 | sd_bus_message *m, | |
1606 | size_t size, | |
1607 | char **s) { | |
1608 | ||
f8e013f8 | 1609 | struct bus_container *c; |
f8e013f8 | 1610 | void *a; |
f8e013f8 | 1611 | |
9d6c7c82 LP |
1612 | assert_return(m, -EINVAL); |
1613 | assert_return(s, -EINVAL); | |
1614 | assert_return(!m->sealed, -EPERM); | |
1615 | assert_return(!m->poisoned, -ESTALE); | |
f8e013f8 LP |
1616 | |
1617 | c = message_get_container(m); | |
1618 | ||
1619 | if (c->signature && c->signature[c->index]) { | |
1620 | /* Container signature is already set */ | |
1621 | ||
1622 | if (c->signature[c->index] != SD_BUS_TYPE_STRING) | |
1623 | return -ENXIO; | |
1624 | } else { | |
5cbe7492 LP |
1625 | char *e; |
1626 | ||
ad67ef27 | 1627 | /* Maybe we can append to the signature? But only if this is the top-level container */ |
f8e013f8 LP |
1628 | if (c->enclosing != 0) |
1629 | return -ENXIO; | |
1630 | ||
1631 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL); | |
bc7fd8cd LP |
1632 | if (!e) { |
1633 | m->poisoned = true; | |
f8e013f8 | 1634 | return -ENOMEM; |
bc7fd8cd | 1635 | } |
f8e013f8 LP |
1636 | } |
1637 | ||
6647dc66 | 1638 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f | 1639 | a = message_extend_body(m, 1, size + 1, true, false); |
c1b9d935 LP |
1640 | if (!a) |
1641 | return -ENOMEM; | |
1642 | ||
1643 | *s = a; | |
1644 | } else { | |
2ac7c17f | 1645 | a = message_extend_body(m, 4, 4 + size + 1, false, false); |
c1b9d935 LP |
1646 | if (!a) |
1647 | return -ENOMEM; | |
f8e013f8 | 1648 | |
c1b9d935 LP |
1649 | *(uint32_t*) a = size; |
1650 | *s = (char*) a + 4; | |
1651 | } | |
f8e013f8 LP |
1652 | |
1653 | (*s)[size] = 0; | |
1654 | ||
1655 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1656 | c->index++; | |
1657 | ||
1658 | return 0; | |
f8e013f8 LP |
1659 | } |
1660 | ||
938bcbab LP |
1661 | _public_ int sd_bus_message_append_string_iovec( |
1662 | sd_bus_message *m, | |
1663 | const struct iovec *iov, | |
1664 | unsigned n) { | |
1665 | ||
1666 | size_t size; | |
1667 | unsigned i; | |
1668 | char *p; | |
1669 | int r; | |
1670 | ||
1671 | assert_return(m, -EINVAL); | |
1672 | assert_return(!m->sealed, -EPERM); | |
1673 | assert_return(iov || n == 0, -EINVAL); | |
1674 | assert_return(!m->poisoned, -ESTALE); | |
1675 | ||
1676 | size = IOVEC_TOTAL_SIZE(iov, n); | |
1677 | ||
1678 | r = sd_bus_message_append_string_space(m, size, &p); | |
1679 | if (r < 0) | |
1680 | return r; | |
1681 | ||
1682 | for (i = 0; i < n; i++) { | |
1683 | ||
1684 | if (iov[i].iov_base) | |
1685 | memcpy(p, iov[i].iov_base, iov[i].iov_len); | |
1686 | else | |
1687 | memset(p, ' ', iov[i].iov_len); | |
1688 | ||
1689 | p += iov[i].iov_len; | |
1690 | } | |
1691 | ||
1692 | return 0; | |
1693 | } | |
1694 | ||
de1c301e LP |
1695 | static int bus_message_open_array( |
1696 | sd_bus_message *m, | |
1697 | struct bus_container *c, | |
1698 | const char *contents, | |
c1b9d935 LP |
1699 | uint32_t **array_size, |
1700 | size_t *begin, | |
1701 | bool *need_offsets) { | |
de1c301e | 1702 | |
9a17484d | 1703 | unsigned nindex; |
c1b9d935 | 1704 | int alignment, r; |
de1c301e LP |
1705 | |
1706 | assert(m); | |
1707 | assert(c); | |
1708 | assert(contents); | |
1709 | assert(array_size); | |
c1b9d935 LP |
1710 | assert(begin); |
1711 | assert(need_offsets); | |
de1c301e | 1712 | |
29ddb38f | 1713 | if (!signature_is_single(contents, true)) |
de1c301e LP |
1714 | return -EINVAL; |
1715 | ||
de1c301e LP |
1716 | if (c->signature && c->signature[c->index]) { |
1717 | ||
1718 | /* Verify the existing signature */ | |
1719 | ||
1720 | if (c->signature[c->index] != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1721 | return -ENXIO; |
de1c301e LP |
1722 | |
1723 | if (!startswith(c->signature + c->index + 1, contents)) | |
9a17484d | 1724 | return -ENXIO; |
de1c301e LP |
1725 | |
1726 | nindex = c->index + 1 + strlen(contents); | |
1727 | } else { | |
5cbe7492 LP |
1728 | char *e; |
1729 | ||
de1c301e | 1730 | if (c->enclosing != 0) |
9a17484d | 1731 | return -ENXIO; |
de1c301e LP |
1732 | |
1733 | /* Extend the existing signature */ | |
1734 | ||
1735 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_ARRAY), contents, NULL); | |
bc7fd8cd LP |
1736 | if (!e) { |
1737 | m->poisoned = true; | |
de1c301e | 1738 | return -ENOMEM; |
bc7fd8cd | 1739 | } |
de1c301e LP |
1740 | |
1741 | nindex = e - c->signature; | |
1742 | } | |
1743 | ||
6647dc66 | 1744 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 LP |
1745 | alignment = bus_gvariant_get_alignment(contents); |
1746 | if (alignment < 0) | |
1747 | return alignment; | |
de1c301e | 1748 | |
c1b9d935 | 1749 | /* Add alignment padding and add to offset list */ |
2ac7c17f | 1750 | if (!message_extend_body(m, alignment, 0, false, false)) |
c1b9d935 | 1751 | return -ENOMEM; |
de1c301e | 1752 | |
c1b9d935 LP |
1753 | r = bus_gvariant_is_fixed_size(contents); |
1754 | if (r < 0) | |
1755 | return r; | |
1756 | ||
2ac7c17f | 1757 | *begin = m->body_size; |
c1b9d935 LP |
1758 | *need_offsets = r == 0; |
1759 | } else { | |
1760 | void *a, *op; | |
1761 | size_t os; | |
1762 | struct bus_body_part *o; | |
1763 | ||
1764 | alignment = bus_type_get_alignment(contents[0]); | |
1765 | if (alignment < 0) | |
1766 | return alignment; | |
1767 | ||
2ac7c17f | 1768 | a = message_extend_body(m, 4, 4, false, false); |
c1b9d935 LP |
1769 | if (!a) |
1770 | return -ENOMEM; | |
1771 | ||
1772 | o = m->body_end; | |
1773 | op = m->body_end->data; | |
1774 | os = m->body_end->size; | |
1775 | ||
1776 | /* Add alignment between size and first element */ | |
2ac7c17f | 1777 | if (!message_extend_body(m, alignment, 0, false, false)) |
c1b9d935 LP |
1778 | return -ENOMEM; |
1779 | ||
1780 | /* location of array size might have changed so let's readjust a */ | |
1781 | if (o == m->body_end) | |
1782 | a = adjust_pointer(a, op, os, m->body_end->data); | |
1783 | ||
1784 | *(uint32_t*) a = 0; | |
1785 | *array_size = a; | |
1786 | } | |
de1c301e LP |
1787 | |
1788 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1789 | c->index = nindex; | |
1790 | ||
de1c301e LP |
1791 | return 0; |
1792 | } | |
1793 | ||
1794 | static int bus_message_open_variant( | |
1795 | sd_bus_message *m, | |
1796 | struct bus_container *c, | |
1797 | const char *contents) { | |
1798 | ||
de1c301e LP |
1799 | assert(m); |
1800 | assert(c); | |
1801 | assert(contents); | |
1802 | ||
29ddb38f | 1803 | if (!signature_is_single(contents, false)) |
de1c301e LP |
1804 | return -EINVAL; |
1805 | ||
1806 | if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN) | |
1807 | return -EINVAL; | |
1808 | ||
1809 | if (c->signature && c->signature[c->index]) { | |
1810 | ||
1811 | if (c->signature[c->index] != SD_BUS_TYPE_VARIANT) | |
9a17484d | 1812 | return -ENXIO; |
de1c301e LP |
1813 | |
1814 | } else { | |
5cbe7492 LP |
1815 | char *e; |
1816 | ||
de1c301e | 1817 | if (c->enclosing != 0) |
9a17484d | 1818 | return -ENXIO; |
de1c301e LP |
1819 | |
1820 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_VARIANT), NULL); | |
bc7fd8cd LP |
1821 | if (!e) { |
1822 | m->poisoned = true; | |
de1c301e | 1823 | return -ENOMEM; |
bc7fd8cd | 1824 | } |
de1c301e LP |
1825 | } |
1826 | ||
6647dc66 | 1827 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 LP |
1828 | /* Variants are always aligned to 8 */ |
1829 | ||
2ac7c17f | 1830 | if (!message_extend_body(m, 8, 0, false, false)) |
c1b9d935 LP |
1831 | return -ENOMEM; |
1832 | ||
1833 | } else { | |
1834 | size_t l; | |
1835 | void *a; | |
de1c301e | 1836 | |
c1b9d935 | 1837 | l = strlen(contents); |
2ac7c17f | 1838 | a = message_extend_body(m, 1, 1 + l + 1, false, false); |
c1b9d935 LP |
1839 | if (!a) |
1840 | return -ENOMEM; | |
1841 | ||
1842 | *(uint8_t*) a = l; | |
1843 | memcpy((uint8_t*) a + 1, contents, l + 1); | |
1844 | } | |
de1c301e LP |
1845 | |
1846 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1847 | c->index++; |
de1c301e LP |
1848 | |
1849 | return 0; | |
1850 | } | |
1851 | ||
1852 | static int bus_message_open_struct( | |
1853 | sd_bus_message *m, | |
1854 | struct bus_container *c, | |
c1b9d935 LP |
1855 | const char *contents, |
1856 | size_t *begin, | |
1857 | bool *need_offsets) { | |
de1c301e LP |
1858 | |
1859 | size_t nindex; | |
c1b9d935 | 1860 | int r; |
de1c301e LP |
1861 | |
1862 | assert(m); | |
1863 | assert(c); | |
1864 | assert(contents); | |
c1b9d935 LP |
1865 | assert(begin); |
1866 | assert(need_offsets); | |
de1c301e LP |
1867 | |
1868 | if (!signature_is_valid(contents, false)) | |
1869 | return -EINVAL; | |
1870 | ||
1871 | if (c->signature && c->signature[c->index]) { | |
1872 | size_t l; | |
1873 | ||
1874 | l = strlen(contents); | |
1875 | ||
1876 | if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN || | |
1877 | !startswith(c->signature + c->index + 1, contents) || | |
1878 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END) | |
9a17484d | 1879 | return -ENXIO; |
de1c301e LP |
1880 | |
1881 | nindex = c->index + 1 + l + 1; | |
1882 | } else { | |
5cbe7492 LP |
1883 | char *e; |
1884 | ||
de1c301e | 1885 | if (c->enclosing != 0) |
9a17484d | 1886 | return -ENXIO; |
de1c301e LP |
1887 | |
1888 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_BEGIN), contents, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_END), NULL); | |
bc7fd8cd LP |
1889 | if (!e) { |
1890 | m->poisoned = true; | |
de1c301e | 1891 | return -ENOMEM; |
bc7fd8cd | 1892 | } |
de1c301e LP |
1893 | |
1894 | nindex = e - c->signature; | |
1895 | } | |
1896 | ||
6647dc66 | 1897 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 LP |
1898 | int alignment; |
1899 | ||
1900 | alignment = bus_gvariant_get_alignment(contents); | |
1901 | if (alignment < 0) | |
1902 | return alignment; | |
1903 | ||
2ac7c17f | 1904 | if (!message_extend_body(m, alignment, 0, false, false)) |
c1b9d935 LP |
1905 | return -ENOMEM; |
1906 | ||
1907 | r = bus_gvariant_is_fixed_size(contents); | |
1908 | if (r < 0) | |
1909 | return r; | |
1910 | ||
2ac7c17f | 1911 | *begin = m->body_size; |
c1b9d935 LP |
1912 | *need_offsets = r == 0; |
1913 | } else { | |
1914 | /* Align contents to 8 byte boundary */ | |
2ac7c17f | 1915 | if (!message_extend_body(m, 8, 0, false, false)) |
c1b9d935 LP |
1916 | return -ENOMEM; |
1917 | } | |
de1c301e LP |
1918 | |
1919 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1920 | c->index = nindex; | |
1921 | ||
1922 | return 0; | |
1923 | } | |
1924 | ||
1925 | static int bus_message_open_dict_entry( | |
1926 | sd_bus_message *m, | |
1927 | struct bus_container *c, | |
c1b9d935 LP |
1928 | const char *contents, |
1929 | size_t *begin, | |
1930 | bool *need_offsets) { | |
de1c301e | 1931 | |
c1b9d935 | 1932 | int r; |
de1c301e LP |
1933 | |
1934 | assert(m); | |
1935 | assert(c); | |
1936 | assert(contents); | |
c1b9d935 LP |
1937 | assert(begin); |
1938 | assert(need_offsets); | |
de1c301e LP |
1939 | |
1940 | if (!signature_is_pair(contents)) | |
1941 | return -EINVAL; | |
1942 | ||
1943 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1944 | return -ENXIO; |
de1c301e LP |
1945 | |
1946 | if (c->signature && c->signature[c->index]) { | |
1947 | size_t l; | |
1948 | ||
1949 | l = strlen(contents); | |
1950 | ||
1951 | if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN || | |
1952 | !startswith(c->signature + c->index + 1, contents) || | |
1953 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END) | |
9a17484d | 1954 | return -ENXIO; |
de1c301e | 1955 | } else |
9a17484d | 1956 | return -ENXIO; |
de1c301e | 1957 | |
6647dc66 | 1958 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 | 1959 | int alignment; |
de1c301e | 1960 | |
c1b9d935 LP |
1961 | alignment = bus_gvariant_get_alignment(contents); |
1962 | if (alignment < 0) | |
1963 | return alignment; | |
1964 | ||
2ac7c17f | 1965 | if (!message_extend_body(m, alignment, 0, false, false)) |
c1b9d935 LP |
1966 | return -ENOMEM; |
1967 | ||
1968 | r = bus_gvariant_is_fixed_size(contents); | |
1969 | if (r < 0) | |
1970 | return r; | |
1971 | ||
2ac7c17f | 1972 | *begin = m->body_size; |
c1b9d935 LP |
1973 | *need_offsets = r == 0; |
1974 | } else { | |
1975 | /* Align contents to 8 byte boundary */ | |
2ac7c17f | 1976 | if (!message_extend_body(m, 8, 0, false, false)) |
c1b9d935 LP |
1977 | return -ENOMEM; |
1978 | } | |
de1c301e LP |
1979 | |
1980 | return 0; | |
1981 | } | |
1982 | ||
d9f644e2 | 1983 | _public_ int sd_bus_message_open_container( |
de1c301e LP |
1984 | sd_bus_message *m, |
1985 | char type, | |
1986 | const char *contents) { | |
1987 | ||
9a17484d | 1988 | struct bus_container *c, *w; |
de1c301e | 1989 | uint32_t *array_size = NULL; |
9a17484d | 1990 | char *signature; |
39883f62 | 1991 | size_t before, begin = 0; |
c1b9d935 | 1992 | bool need_offsets = false; |
de1c301e LP |
1993 | int r; |
1994 | ||
9d6c7c82 LP |
1995 | assert_return(m, -EINVAL); |
1996 | assert_return(!m->sealed, -EPERM); | |
1997 | assert_return(contents, -EINVAL); | |
1998 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
1999 | |
2000 | /* Make sure we have space for one more container */ | |
306f07be | 2001 | if (!GREEDY_REALLOC(m->containers, m->containers_allocated, m->n_containers + 1)) { |
bc7fd8cd | 2002 | m->poisoned = true; |
de1c301e | 2003 | return -ENOMEM; |
bc7fd8cd LP |
2004 | } |
2005 | ||
de1c301e LP |
2006 | c = message_get_container(m); |
2007 | ||
2008 | signature = strdup(contents); | |
bc7fd8cd LP |
2009 | if (!signature) { |
2010 | m->poisoned = true; | |
de1c301e | 2011 | return -ENOMEM; |
bc7fd8cd | 2012 | } |
de1c301e | 2013 | |
b3af9646 LP |
2014 | /* Save old index in the parent container, in case we have to |
2015 | * abort this container */ | |
2016 | c->saved_index = c->index; | |
2ac7c17f | 2017 | before = m->body_size; |
b3af9646 | 2018 | |
de1c301e | 2019 | if (type == SD_BUS_TYPE_ARRAY) |
c1b9d935 | 2020 | r = bus_message_open_array(m, c, contents, &array_size, &begin, &need_offsets); |
de1c301e LP |
2021 | else if (type == SD_BUS_TYPE_VARIANT) |
2022 | r = bus_message_open_variant(m, c, contents); | |
2023 | else if (type == SD_BUS_TYPE_STRUCT) | |
c1b9d935 | 2024 | r = bus_message_open_struct(m, c, contents, &begin, &need_offsets); |
de1c301e | 2025 | else if (type == SD_BUS_TYPE_DICT_ENTRY) |
c1b9d935 | 2026 | r = bus_message_open_dict_entry(m, c, contents, &begin, &need_offsets); |
de1c301e LP |
2027 | else |
2028 | r = -EINVAL; | |
2029 | ||
2030 | if (r < 0) { | |
2031 | free(signature); | |
2032 | return r; | |
2033 | } | |
2034 | ||
2035 | /* OK, let's fill it in */ | |
306f07be | 2036 | w = m->containers + m->n_containers++; |
9a17484d LP |
2037 | w->enclosing = type; |
2038 | w->signature = signature; | |
2039 | w->index = 0; | |
2040 | w->array_size = array_size; | |
b3af9646 | 2041 | w->before = before; |
c1b9d935 | 2042 | w->begin = begin; |
306f07be | 2043 | w->n_offsets = w->offsets_allocated = 0; |
c1b9d935 LP |
2044 | w->offsets = NULL; |
2045 | w->need_offsets = need_offsets; | |
2046 | ||
2047 | return 0; | |
2048 | } | |
2049 | ||
2050 | static int bus_message_close_array(sd_bus_message *m, struct bus_container *c) { | |
2051 | ||
2052 | assert(m); | |
2053 | assert(c); | |
2054 | ||
6647dc66 | 2055 | if (!BUS_MESSAGE_IS_GVARIANT(m)) |
c1b9d935 LP |
2056 | return 0; |
2057 | ||
2058 | if (c->need_offsets) { | |
6647dc66 | 2059 | size_t payload, sz, i; |
c1b9d935 | 2060 | uint8_t *a; |
c1b9d935 LP |
2061 | |
2062 | /* Variable-width arrays */ | |
2063 | ||
6647dc66 | 2064 | payload = c->n_offsets > 0 ? c->offsets[c->n_offsets-1] - c->begin : 0; |
2ac7c17f | 2065 | sz = bus_gvariant_determine_word_size(payload, c->n_offsets); |
c1b9d935 | 2066 | |
2ac7c17f | 2067 | a = message_extend_body(m, 1, sz * c->n_offsets, true, false); |
6647dc66 LP |
2068 | if (!a) |
2069 | return -ENOMEM; | |
c1b9d935 | 2070 | |
6647dc66 | 2071 | for (i = 0; i < c->n_offsets; i++) |
2ac7c17f | 2072 | bus_gvariant_write_word_le(a + sz*i, sz, c->offsets[i] - c->begin); |
c1b9d935 LP |
2073 | } else { |
2074 | void *a; | |
2075 | ||
2076 | /* Fixed-width or empty arrays */ | |
2077 | ||
2ac7c17f | 2078 | a = message_extend_body(m, 1, 0, true, false); /* let's add offset to parent */ |
c1b9d935 LP |
2079 | if (!a) |
2080 | return -ENOMEM; | |
2081 | } | |
2082 | ||
2083 | return 0; | |
2084 | } | |
2085 | ||
2086 | static int bus_message_close_variant(sd_bus_message *m, struct bus_container *c) { | |
2087 | uint8_t *a; | |
2088 | size_t l; | |
2089 | ||
2090 | assert(m); | |
2091 | assert(c); | |
3e49a3a0 | 2092 | assert(c->signature); |
c1b9d935 | 2093 | |
6647dc66 | 2094 | if (!BUS_MESSAGE_IS_GVARIANT(m)) |
c1b9d935 LP |
2095 | return 0; |
2096 | ||
2097 | l = strlen(c->signature); | |
2098 | ||
2ac7c17f | 2099 | a = message_extend_body(m, 1, 1 + l, true, false); |
c1b9d935 LP |
2100 | if (!a) |
2101 | return -ENOMEM; | |
2102 | ||
2103 | a[0] = 0; | |
2104 | memcpy(a+1, c->signature, l); | |
2105 | ||
2106 | return 0; | |
2107 | } | |
2108 | ||
2109 | static int bus_message_close_struct(sd_bus_message *m, struct bus_container *c, bool add_offset) { | |
443a5598 | 2110 | bool fixed_size = true; |
c1b9d935 LP |
2111 | size_t n_variable = 0; |
2112 | unsigned i = 0; | |
2113 | const char *p; | |
2114 | uint8_t *a; | |
2115 | int r; | |
2116 | ||
2117 | assert(m); | |
2118 | assert(c); | |
2119 | ||
6647dc66 | 2120 | if (!BUS_MESSAGE_IS_GVARIANT(m)) |
c1b9d935 LP |
2121 | return 0; |
2122 | ||
d6385068 | 2123 | p = strempty(c->signature); |
c1b9d935 LP |
2124 | while (*p != 0) { |
2125 | size_t n; | |
2126 | ||
2127 | r = signature_element_length(p, &n); | |
2128 | if (r < 0) | |
2129 | return r; | |
2130 | else { | |
2131 | char t[n+1]; | |
2132 | ||
2133 | memcpy(t, p, n); | |
2134 | t[n] = 0; | |
2135 | ||
2136 | r = bus_gvariant_is_fixed_size(t); | |
2137 | if (r < 0) | |
2138 | return r; | |
2139 | } | |
2140 | ||
8f19720d | 2141 | assert(!c->need_offsets || i <= c->n_offsets); |
c1b9d935 LP |
2142 | |
2143 | /* We need to add an offset for each item that has a | |
2144 | * variable size and that is not the last one in the | |
2145 | * list */ | |
443a5598 DH |
2146 | if (r == 0) |
2147 | fixed_size = false; | |
c1b9d935 LP |
2148 | if (r == 0 && p[n] != 0) |
2149 | n_variable++; | |
c1b9d935 LP |
2150 | |
2151 | i++; | |
2152 | p += n; | |
2153 | } | |
2154 | ||
8f19720d LP |
2155 | assert(!c->need_offsets || i == c->n_offsets); |
2156 | assert(c->need_offsets || n_variable == 0); | |
6647dc66 | 2157 | |
e53d21d0 DH |
2158 | if (isempty(c->signature)) { |
2159 | /* The unary type is encoded as fixed 1 byte padding */ | |
2160 | a = message_extend_body(m, 1, 1, add_offset, false); | |
2161 | if (!a) | |
2162 | return -ENOMEM; | |
2163 | ||
2164 | *a = 0; | |
2165 | } else if (n_variable <= 0) { | |
443a5598 DH |
2166 | int alignment = 1; |
2167 | ||
2168 | /* Structures with fixed-size members only have to be | |
2169 | * fixed-size themselves. But gvariant requires all fixed-size | |
2170 | * elements to be sized a multiple of their alignment. Hence, | |
2171 | * we must *always* add final padding after the last member so | |
2172 | * the overall size of the structure is properly aligned. */ | |
2173 | if (fixed_size) | |
2174 | alignment = bus_gvariant_get_alignment(strempty(c->signature)); | |
2175 | ||
2176 | assert(alignment > 0); | |
2177 | ||
2178 | a = message_extend_body(m, alignment, 0, add_offset, false); | |
c1b9d935 LP |
2179 | if (!a) |
2180 | return -ENOMEM; | |
2181 | } else { | |
6647dc66 | 2182 | size_t sz; |
c1b9d935 LP |
2183 | unsigned j; |
2184 | ||
2ac7c17f | 2185 | assert(c->offsets[c->n_offsets-1] == m->body_size); |
c1b9d935 | 2186 | |
2ac7c17f | 2187 | sz = bus_gvariant_determine_word_size(m->body_size - c->begin, n_variable); |
c1b9d935 | 2188 | |
2ac7c17f | 2189 | a = message_extend_body(m, 1, sz * n_variable, add_offset, false); |
c1b9d935 LP |
2190 | if (!a) |
2191 | return -ENOMEM; | |
2192 | ||
d6385068 | 2193 | p = strempty(c->signature); |
c1b9d935 | 2194 | for (i = 0, j = 0; i < c->n_offsets; i++) { |
c1b9d935 | 2195 | unsigned k; |
6647dc66 LP |
2196 | size_t n; |
2197 | ||
2198 | r = signature_element_length(p, &n); | |
2199 | if (r < 0) | |
2200 | return r; | |
2201 | else { | |
2202 | char t[n+1]; | |
2203 | ||
2204 | memcpy(t, p, n); | |
2205 | t[n] = 0; | |
2206 | ||
2207 | p += n; | |
c1b9d935 | 2208 | |
6647dc66 LP |
2209 | r = bus_gvariant_is_fixed_size(t); |
2210 | if (r < 0) | |
2211 | return r; | |
2212 | if (r > 0 || p[0] == 0) | |
2213 | continue; | |
2214 | } | |
c1b9d935 | 2215 | |
c1b9d935 LP |
2216 | k = n_variable - 1 - j; |
2217 | ||
2ac7c17f | 2218 | bus_gvariant_write_word_le(a + k * sz, sz, c->offsets[i] - c->begin); |
c1b9d935 LP |
2219 | |
2220 | j++; | |
2221 | } | |
2222 | } | |
de1c301e LP |
2223 | |
2224 | return 0; | |
2225 | } | |
2226 | ||
d9f644e2 | 2227 | _public_ int sd_bus_message_close_container(sd_bus_message *m) { |
de1c301e | 2228 | struct bus_container *c; |
c1b9d935 | 2229 | int r; |
de1c301e | 2230 | |
9d6c7c82 LP |
2231 | assert_return(m, -EINVAL); |
2232 | assert_return(!m->sealed, -EPERM); | |
2233 | assert_return(m->n_containers > 0, -EINVAL); | |
2234 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
2235 | |
2236 | c = message_get_container(m); | |
c1b9d935 | 2237 | |
de1c301e | 2238 | if (c->enclosing != SD_BUS_TYPE_ARRAY) |
9a17484d | 2239 | if (c->signature && c->signature[c->index] != 0) |
de1c301e LP |
2240 | return -EINVAL; |
2241 | ||
de1c301e LP |
2242 | m->n_containers--; |
2243 | ||
c1b9d935 LP |
2244 | if (c->enclosing == SD_BUS_TYPE_ARRAY) |
2245 | r = bus_message_close_array(m, c); | |
2246 | else if (c->enclosing == SD_BUS_TYPE_VARIANT) | |
2247 | r = bus_message_close_variant(m, c); | |
945c2931 | 2248 | else if (IN_SET(c->enclosing, SD_BUS_TYPE_STRUCT, SD_BUS_TYPE_DICT_ENTRY)) |
c1b9d935 LP |
2249 | r = bus_message_close_struct(m, c, true); |
2250 | else | |
2251 | assert_not_reached("Unknown container type"); | |
2252 | ||
2253 | free(c->signature); | |
6647dc66 LP |
2254 | free(c->offsets); |
2255 | ||
c1b9d935 | 2256 | return r; |
de1c301e LP |
2257 | } |
2258 | ||
1b492614 LP |
2259 | typedef struct { |
2260 | const char *types; | |
2261 | unsigned n_struct; | |
2262 | unsigned n_array; | |
2263 | } TypeStack; | |
2264 | ||
2265 | static int type_stack_push(TypeStack *stack, unsigned max, unsigned *i, const char *types, unsigned n_struct, unsigned n_array) { | |
2266 | assert(stack); | |
2267 | assert(max > 0); | |
2268 | ||
2269 | if (*i >= max) | |
2270 | return -EINVAL; | |
2271 | ||
2272 | stack[*i].types = types; | |
2273 | stack[*i].n_struct = n_struct; | |
2274 | stack[*i].n_array = n_array; | |
2275 | (*i)++; | |
2276 | ||
2277 | return 0; | |
2278 | } | |
2279 | ||
2280 | static int type_stack_pop(TypeStack *stack, unsigned max, unsigned *i, const char **types, unsigned *n_struct, unsigned *n_array) { | |
2281 | assert(stack); | |
2282 | assert(max > 0); | |
2283 | assert(types); | |
2284 | assert(n_struct); | |
2285 | assert(n_array); | |
2286 | ||
2287 | if (*i <= 0) | |
2288 | return 0; | |
2289 | ||
2290 | (*i)--; | |
2291 | *types = stack[*i].types; | |
2292 | *n_struct = stack[*i].n_struct; | |
2293 | *n_array = stack[*i].n_array; | |
2294 | ||
2295 | return 1; | |
2296 | } | |
2297 | ||
19fe49f6 | 2298 | _public_ int sd_bus_message_appendv( |
de1c301e LP |
2299 | sd_bus_message *m, |
2300 | const char *types, | |
2301 | va_list ap) { | |
2302 | ||
1b492614 LP |
2303 | unsigned n_array, n_struct; |
2304 | TypeStack stack[BUS_CONTAINER_DEPTH]; | |
2305 | unsigned stack_ptr = 0; | |
de1c301e LP |
2306 | int r; |
2307 | ||
19fe49f6 FDP |
2308 | assert_return(m, -EINVAL); |
2309 | assert_return(types, -EINVAL); | |
2310 | assert_return(!m->sealed, -EPERM); | |
2311 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e | 2312 | |
1b492614 LP |
2313 | n_array = (unsigned) -1; |
2314 | n_struct = strlen(types); | |
2315 | ||
2316 | for (;;) { | |
2317 | const char *t; | |
2318 | ||
2319 | if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) { | |
2320 | r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array); | |
2321 | if (r < 0) | |
2322 | return r; | |
2323 | if (r == 0) | |
2324 | break; | |
2325 | ||
2326 | r = sd_bus_message_close_container(m); | |
2327 | if (r < 0) | |
2328 | return r; | |
2329 | ||
2330 | continue; | |
2331 | } | |
2332 | ||
2333 | t = types; | |
2334 | if (n_array != (unsigned) -1) | |
313cefa1 | 2335 | n_array--; |
1b492614 | 2336 | else { |
313cefa1 | 2337 | types++; |
1b492614 LP |
2338 | n_struct--; |
2339 | } | |
2340 | ||
de1c301e LP |
2341 | switch (*t) { |
2342 | ||
2343 | case SD_BUS_TYPE_BYTE: { | |
2344 | uint8_t x; | |
2345 | ||
2346 | x = (uint8_t) va_arg(ap, int); | |
2347 | r = sd_bus_message_append_basic(m, *t, &x); | |
2348 | break; | |
2349 | } | |
2350 | ||
2351 | case SD_BUS_TYPE_BOOLEAN: | |
2352 | case SD_BUS_TYPE_INT32: | |
9a17484d LP |
2353 | case SD_BUS_TYPE_UINT32: |
2354 | case SD_BUS_TYPE_UNIX_FD: { | |
de1c301e LP |
2355 | uint32_t x; |
2356 | ||
9a17484d LP |
2357 | /* We assume a boolean is the same as int32_t */ |
2358 | assert_cc(sizeof(int32_t) == sizeof(int)); | |
2359 | ||
de1c301e LP |
2360 | x = va_arg(ap, uint32_t); |
2361 | r = sd_bus_message_append_basic(m, *t, &x); | |
2362 | break; | |
2363 | } | |
2364 | ||
2365 | case SD_BUS_TYPE_INT16: | |
2366 | case SD_BUS_TYPE_UINT16: { | |
2367 | uint16_t x; | |
2368 | ||
2369 | x = (uint16_t) va_arg(ap, int); | |
2370 | r = sd_bus_message_append_basic(m, *t, &x); | |
2371 | break; | |
2372 | } | |
2373 | ||
2374 | case SD_BUS_TYPE_INT64: | |
6cd37a5e | 2375 | case SD_BUS_TYPE_UINT64: { |
de1c301e LP |
2376 | uint64_t x; |
2377 | ||
2378 | x = va_arg(ap, uint64_t); | |
2379 | r = sd_bus_message_append_basic(m, *t, &x); | |
2380 | break; | |
2381 | } | |
2382 | ||
6cd37a5e LP |
2383 | case SD_BUS_TYPE_DOUBLE: { |
2384 | double x; | |
2385 | ||
2386 | x = va_arg(ap, double); | |
2387 | r = sd_bus_message_append_basic(m, *t, &x); | |
2388 | break; | |
2389 | } | |
2390 | ||
de1c301e LP |
2391 | case SD_BUS_TYPE_STRING: |
2392 | case SD_BUS_TYPE_OBJECT_PATH: | |
2393 | case SD_BUS_TYPE_SIGNATURE: { | |
2394 | const char *x; | |
2395 | ||
2396 | x = va_arg(ap, const char*); | |
2397 | r = sd_bus_message_append_basic(m, *t, x); | |
2398 | break; | |
2399 | } | |
2400 | ||
de1c301e | 2401 | case SD_BUS_TYPE_ARRAY: { |
de1c301e LP |
2402 | size_t k; |
2403 | ||
2404 | r = signature_element_length(t + 1, &k); | |
2405 | if (r < 0) | |
2406 | return r; | |
2407 | ||
2408 | { | |
2409 | char s[k + 1]; | |
de1c301e LP |
2410 | memcpy(s, t + 1, k); |
2411 | s[k] = 0; | |
de1c301e LP |
2412 | |
2413 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, s); | |
2414 | if (r < 0) | |
2415 | return r; | |
1b492614 | 2416 | } |
de1c301e | 2417 | |
1b492614 LP |
2418 | if (n_array == (unsigned) -1) { |
2419 | types += k; | |
2420 | n_struct -= k; | |
de1c301e LP |
2421 | } |
2422 | ||
1b492614 LP |
2423 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
2424 | if (r < 0) | |
2425 | return r; | |
2426 | ||
2427 | types = t + 1; | |
2428 | n_struct = k; | |
2429 | n_array = va_arg(ap, unsigned); | |
2430 | ||
de1c301e LP |
2431 | break; |
2432 | } | |
2433 | ||
2434 | case SD_BUS_TYPE_VARIANT: { | |
2435 | const char *s; | |
2436 | ||
2437 | s = va_arg(ap, const char*); | |
2438 | if (!s) | |
2439 | return -EINVAL; | |
2440 | ||
2441 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_VARIANT, s); | |
2442 | if (r < 0) | |
2443 | return r; | |
2444 | ||
1b492614 | 2445 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
de1c301e LP |
2446 | if (r < 0) |
2447 | return r; | |
2448 | ||
1b492614 LP |
2449 | types = s; |
2450 | n_struct = strlen(s); | |
2451 | n_array = (unsigned) -1; | |
2452 | ||
de1c301e LP |
2453 | break; |
2454 | } | |
2455 | ||
2456 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
2457 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
2458 | size_t k; | |
2459 | ||
2460 | r = signature_element_length(t, &k); | |
2461 | if (r < 0) | |
2462 | return r; | |
2463 | ||
2464 | { | |
2465 | char s[k - 1]; | |
2466 | ||
2467 | memcpy(s, t + 1, k - 2); | |
2468 | s[k - 2] = 0; | |
2469 | ||
2470 | r = sd_bus_message_open_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
2471 | if (r < 0) | |
2472 | return r; | |
1b492614 | 2473 | } |
de1c301e | 2474 | |
1b492614 LP |
2475 | if (n_array == (unsigned) -1) { |
2476 | types += k - 1; | |
2477 | n_struct -= k - 1; | |
2478 | } | |
de1c301e | 2479 | |
1b492614 LP |
2480 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
2481 | if (r < 0) | |
2482 | return r; | |
de1c301e | 2483 | |
1b492614 LP |
2484 | types = t + 1; |
2485 | n_struct = k - 2; | |
2486 | n_array = (unsigned) -1; | |
de1c301e LP |
2487 | |
2488 | break; | |
2489 | } | |
2490 | ||
2491 | default: | |
2492 | r = -EINVAL; | |
2493 | } | |
2494 | ||
2495 | if (r < 0) | |
2496 | return r; | |
2497 | } | |
2498 | ||
ebcf1f97 | 2499 | return 1; |
de1c301e LP |
2500 | } |
2501 | ||
d9f644e2 | 2502 | _public_ int sd_bus_message_append(sd_bus_message *m, const char *types, ...) { |
de1c301e LP |
2503 | va_list ap; |
2504 | int r; | |
2505 | ||
9d6c7c82 LP |
2506 | assert_return(m, -EINVAL); |
2507 | assert_return(types, -EINVAL); | |
2508 | assert_return(!m->sealed, -EPERM); | |
2509 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
2510 | |
2511 | va_start(ap, types); | |
19fe49f6 | 2512 | r = sd_bus_message_appendv(m, types, ap); |
de1c301e LP |
2513 | va_end(ap); |
2514 | ||
2515 | return r; | |
2516 | } | |
2517 | ||
c1b9d935 LP |
2518 | _public_ int sd_bus_message_append_array_space( |
2519 | sd_bus_message *m, | |
2520 | char type, | |
2521 | size_t size, | |
2522 | void **ptr) { | |
2523 | ||
b3af9646 LP |
2524 | ssize_t align, sz; |
2525 | void *a; | |
2526 | int r; | |
2527 | ||
9d6c7c82 LP |
2528 | assert_return(m, -EINVAL); |
2529 | assert_return(!m->sealed, -EPERM); | |
0039a203 | 2530 | assert_return(bus_type_is_trivial(type) && type != SD_BUS_TYPE_BOOLEAN, -EINVAL); |
9d6c7c82 LP |
2531 | assert_return(ptr || size == 0, -EINVAL); |
2532 | assert_return(!m->poisoned, -ESTALE); | |
b3af9646 | 2533 | |
0039a203 LP |
2534 | /* alignment and size of the trivial types (except bool) is |
2535 | * identical for gvariant and dbus1 marshalling */ | |
b3af9646 LP |
2536 | align = bus_type_get_alignment(type); |
2537 | sz = bus_type_get_size(type); | |
2538 | ||
2539 | assert_se(align > 0); | |
2540 | assert_se(sz > 0); | |
2541 | ||
2542 | if (size % sz != 0) | |
2543 | return -EINVAL; | |
2544 | ||
2545 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
2546 | if (r < 0) | |
2547 | return r; | |
2548 | ||
2ac7c17f | 2549 | a = message_extend_body(m, align, size, false, false); |
bc7fd8cd LP |
2550 | if (!a) |
2551 | return -ENOMEM; | |
b3af9646 LP |
2552 | |
2553 | r = sd_bus_message_close_container(m); | |
2554 | if (r < 0) | |
bc7fd8cd | 2555 | return r; |
b3af9646 LP |
2556 | |
2557 | *ptr = a; | |
2558 | return 0; | |
b3af9646 LP |
2559 | } |
2560 | ||
7dcd79c2 LP |
2561 | _public_ int sd_bus_message_append_array( |
2562 | sd_bus_message *m, | |
2563 | char type, | |
2564 | const void *ptr, | |
2565 | size_t size) { | |
b3af9646 LP |
2566 | int r; |
2567 | void *p; | |
2568 | ||
9d6c7c82 LP |
2569 | assert_return(m, -EINVAL); |
2570 | assert_return(!m->sealed, -EPERM); | |
2571 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
2572 | assert_return(ptr || size == 0, -EINVAL); | |
2573 | assert_return(!m->poisoned, -ESTALE); | |
b3af9646 | 2574 | |
f8e013f8 | 2575 | r = sd_bus_message_append_array_space(m, type, size, &p); |
b3af9646 LP |
2576 | if (r < 0) |
2577 | return r; | |
2578 | ||
75f32f04 | 2579 | memcpy_safe(p, ptr, size); |
b3af9646 LP |
2580 | |
2581 | return 0; | |
2582 | } | |
2583 | ||
938bcbab LP |
2584 | _public_ int sd_bus_message_append_array_iovec( |
2585 | sd_bus_message *m, | |
2586 | char type, | |
2587 | const struct iovec *iov, | |
2588 | unsigned n) { | |
2589 | ||
2590 | size_t size; | |
2591 | unsigned i; | |
2592 | void *p; | |
2593 | int r; | |
2594 | ||
2595 | assert_return(m, -EINVAL); | |
2596 | assert_return(!m->sealed, -EPERM); | |
2597 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
2598 | assert_return(iov || n == 0, -EINVAL); | |
2599 | assert_return(!m->poisoned, -ESTALE); | |
2600 | ||
2601 | size = IOVEC_TOTAL_SIZE(iov, n); | |
2602 | ||
2603 | r = sd_bus_message_append_array_space(m, type, size, &p); | |
2604 | if (r < 0) | |
2605 | return r; | |
2606 | ||
2607 | for (i = 0; i < n; i++) { | |
2608 | ||
2609 | if (iov[i].iov_base) | |
2610 | memcpy(p, iov[i].iov_base, iov[i].iov_len); | |
2611 | else | |
29804cc1 | 2612 | memzero(p, iov[i].iov_len); |
938bcbab LP |
2613 | |
2614 | p = (uint8_t*) p + iov[i].iov_len; | |
2615 | } | |
2616 | ||
2617 | return 0; | |
2618 | } | |
2619 | ||
7dcd79c2 LP |
2620 | _public_ int sd_bus_message_append_array_memfd( |
2621 | sd_bus_message *m, | |
2622 | char type, | |
2623 | int memfd, | |
2624 | uint64_t offset, | |
2625 | uint64_t size) { | |
2626 | ||
453a0c29 LP |
2627 | _cleanup_close_ int copy_fd = -1; |
2628 | struct bus_body_part *part; | |
2629 | ssize_t align, sz; | |
7dcd79c2 | 2630 | uint64_t real_size; |
453a0c29 LP |
2631 | void *a; |
2632 | int r; | |
2633 | ||
7dcd79c2 | 2634 | assert_return(m, -EINVAL); |
8ac43fee | 2635 | assert_return(memfd >= 0, -EBADF); |
7dcd79c2 LP |
2636 | assert_return(bus_type_is_trivial(type), -EINVAL); |
2637 | assert_return(size > 0, -EINVAL); | |
2638 | assert_return(!m->sealed, -EPERM); | |
2639 | assert_return(!m->poisoned, -ESTALE); | |
453a0c29 | 2640 | |
fac9c0d5 | 2641 | r = memfd_set_sealed(memfd); |
453a0c29 LP |
2642 | if (r < 0) |
2643 | return r; | |
2644 | ||
fac9c0d5 | 2645 | copy_fd = dup(memfd); |
453a0c29 LP |
2646 | if (copy_fd < 0) |
2647 | return copy_fd; | |
2648 | ||
7dcd79c2 | 2649 | r = memfd_get_size(memfd, &real_size); |
453a0c29 LP |
2650 | if (r < 0) |
2651 | return r; | |
2652 | ||
7dcd79c2 LP |
2653 | if (offset == 0 && size == (uint64_t) -1) |
2654 | size = real_size; | |
2655 | else if (offset + size > real_size) | |
2656 | return -EMSGSIZE; | |
2657 | ||
453a0c29 LP |
2658 | align = bus_type_get_alignment(type); |
2659 | sz = bus_type_get_size(type); | |
2660 | ||
2661 | assert_se(align > 0); | |
2662 | assert_se(sz > 0); | |
2663 | ||
7dcd79c2 LP |
2664 | if (offset % align != 0) |
2665 | return -EINVAL; | |
2666 | ||
453a0c29 LP |
2667 | if (size % sz != 0) |
2668 | return -EINVAL; | |
2669 | ||
5cbe7492 | 2670 | if (size > (uint64_t) (uint32_t) -1) |
453a0c29 LP |
2671 | return -EINVAL; |
2672 | ||
2673 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
2674 | if (r < 0) | |
2675 | return r; | |
2676 | ||
2ac7c17f | 2677 | a = message_extend_body(m, align, 0, false, false); |
453a0c29 LP |
2678 | if (!a) |
2679 | return -ENOMEM; | |
2680 | ||
2681 | part = message_append_part(m); | |
2682 | if (!part) | |
2683 | return -ENOMEM; | |
2684 | ||
2685 | part->memfd = copy_fd; | |
7dcd79c2 | 2686 | part->memfd_offset = offset; |
453a0c29 LP |
2687 | part->sealed = true; |
2688 | part->size = size; | |
2689 | copy_fd = -1; | |
2690 | ||
2ac7c17f | 2691 | m->body_size += size; |
0039a203 | 2692 | message_extend_containers(m, size); |
453a0c29 LP |
2693 | |
2694 | return sd_bus_message_close_container(m); | |
2695 | } | |
2696 | ||
7dcd79c2 LP |
2697 | _public_ int sd_bus_message_append_string_memfd( |
2698 | sd_bus_message *m, | |
2699 | int memfd, | |
2700 | uint64_t offset, | |
2701 | uint64_t size) { | |
2702 | ||
5cbe7492 LP |
2703 | _cleanup_close_ int copy_fd = -1; |
2704 | struct bus_body_part *part; | |
2705 | struct bus_container *c; | |
7dcd79c2 | 2706 | uint64_t real_size; |
5cbe7492 LP |
2707 | void *a; |
2708 | int r; | |
2709 | ||
55736ed0 | 2710 | assert_return(m, -EINVAL); |
8ac43fee | 2711 | assert_return(memfd >= 0, -EBADF); |
7dcd79c2 | 2712 | assert_return(size > 0, -EINVAL); |
55736ed0 LP |
2713 | assert_return(!m->sealed, -EPERM); |
2714 | assert_return(!m->poisoned, -ESTALE); | |
5cbe7492 | 2715 | |
fac9c0d5 | 2716 | r = memfd_set_sealed(memfd); |
5cbe7492 LP |
2717 | if (r < 0) |
2718 | return r; | |
2719 | ||
fac9c0d5 | 2720 | copy_fd = dup(memfd); |
5cbe7492 LP |
2721 | if (copy_fd < 0) |
2722 | return copy_fd; | |
2723 | ||
7dcd79c2 | 2724 | r = memfd_get_size(memfd, &real_size); |
5cbe7492 LP |
2725 | if (r < 0) |
2726 | return r; | |
2727 | ||
7dcd79c2 LP |
2728 | if (offset == 0 && size == (uint64_t) -1) |
2729 | size = real_size; | |
2730 | else if (offset + size > real_size) | |
2731 | return -EMSGSIZE; | |
2732 | ||
5cbe7492 LP |
2733 | /* We require this to be NUL terminated */ |
2734 | if (size == 0) | |
2735 | return -EINVAL; | |
2736 | ||
2737 | if (size > (uint64_t) (uint32_t) -1) | |
2738 | return -EINVAL; | |
2739 | ||
2740 | c = message_get_container(m); | |
2741 | if (c->signature && c->signature[c->index]) { | |
2742 | /* Container signature is already set */ | |
2743 | ||
2744 | if (c->signature[c->index] != SD_BUS_TYPE_STRING) | |
2745 | return -ENXIO; | |
2746 | } else { | |
2747 | char *e; | |
2748 | ||
ad67ef27 | 2749 | /* Maybe we can append to the signature? But only if this is the top-level container */ |
5cbe7492 LP |
2750 | if (c->enclosing != 0) |
2751 | return -ENXIO; | |
2752 | ||
2753 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL); | |
2754 | if (!e) { | |
2755 | m->poisoned = true; | |
2756 | return -ENOMEM; | |
2757 | } | |
2758 | } | |
2759 | ||
6647dc66 | 2760 | if (!BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f | 2761 | a = message_extend_body(m, 4, 4, false, false); |
c1b9d935 LP |
2762 | if (!a) |
2763 | return -ENOMEM; | |
5cbe7492 | 2764 | |
c1b9d935 LP |
2765 | *(uint32_t*) a = size - 1; |
2766 | } | |
5cbe7492 LP |
2767 | |
2768 | part = message_append_part(m); | |
2769 | if (!part) | |
2770 | return -ENOMEM; | |
2771 | ||
2772 | part->memfd = copy_fd; | |
7dcd79c2 | 2773 | part->memfd_offset = offset; |
5cbe7492 LP |
2774 | part->sealed = true; |
2775 | part->size = size; | |
2776 | copy_fd = -1; | |
2777 | ||
2ac7c17f | 2778 | m->body_size += size; |
c1b9d935 LP |
2779 | message_extend_containers(m, size); |
2780 | ||
6647dc66 | 2781 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f | 2782 | r = message_add_offset(m, m->body_size); |
c1b9d935 LP |
2783 | if (r < 0) { |
2784 | m->poisoned = true; | |
2785 | return -ENOMEM; | |
2786 | } | |
2787 | } | |
5cbe7492 LP |
2788 | |
2789 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2790 | c->index++; | |
2791 | ||
2792 | return 0; | |
2793 | } | |
2794 | ||
d9f644e2 | 2795 | _public_ int sd_bus_message_append_strv(sd_bus_message *m, char **l) { |
55736ed0 LP |
2796 | char **i; |
2797 | int r; | |
2798 | ||
2799 | assert_return(m, -EINVAL); | |
2800 | assert_return(!m->sealed, -EPERM); | |
2801 | assert_return(!m->poisoned, -ESTALE); | |
2802 | ||
2803 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2804 | if (r < 0) | |
2805 | return r; | |
2806 | ||
2807 | STRV_FOREACH(i, l) { | |
2808 | r = sd_bus_message_append_basic(m, 's', *i); | |
2809 | if (r < 0) | |
2810 | return r; | |
2811 | } | |
2812 | ||
2813 | return sd_bus_message_close_container(m); | |
2814 | } | |
2815 | ||
81389225 | 2816 | static int bus_message_close_header(sd_bus_message *m) { |
81389225 LP |
2817 | |
2818 | assert(m); | |
2819 | ||
2ac7c17f LP |
2820 | /* The actual user data is finished now, we just complete the |
2821 | variant and struct now (at least on gvariant). Remember | |
61233823 | 2822 | this position, so that during parsing we know where to |
2ac7c17f LP |
2823 | put the outer container end. */ |
2824 | m->user_body_size = m->body_size; | |
81389225 | 2825 | |
2ac7c17f LP |
2826 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2827 | const char *signature; | |
2828 | size_t sz, l; | |
2829 | void *d; | |
b381de41 | 2830 | |
2ac7c17f LP |
2831 | /* Add offset table to end of fields array */ |
2832 | if (m->n_header_offsets >= 1) { | |
2833 | uint8_t *a; | |
2834 | unsigned i; | |
b381de41 | 2835 | |
2ac7c17f | 2836 | assert(m->fields_size == m->header_offsets[m->n_header_offsets-1]); |
b381de41 | 2837 | |
2ac7c17f LP |
2838 | sz = bus_gvariant_determine_word_size(m->fields_size, m->n_header_offsets); |
2839 | a = message_extend_fields(m, 1, sz * m->n_header_offsets, false); | |
2840 | if (!a) | |
2841 | return -ENOMEM; | |
2842 | ||
2843 | for (i = 0; i < m->n_header_offsets; i++) | |
2844 | bus_gvariant_write_word_le(a + sz*i, sz, m->header_offsets[i]); | |
2845 | } | |
2846 | ||
2847 | /* Add gvariant NUL byte plus signature to the end of | |
2848 | * the body, followed by the final offset pointing to | |
2849 | * the end of the fields array */ | |
b381de41 | 2850 | |
2ac7c17f LP |
2851 | signature = strempty(m->root_container.signature); |
2852 | l = strlen(signature); | |
2853 | ||
03ebf5e8 DH |
2854 | sz = bus_gvariant_determine_word_size(sizeof(struct bus_header) + ALIGN8(m->fields_size) + m->body_size + 1 + l + 2, 1); |
2855 | d = message_extend_body(m, 1, 1 + l + 2 + sz, false, true); | |
2ac7c17f LP |
2856 | if (!d) |
2857 | return -ENOMEM; | |
2858 | ||
2859 | *(uint8_t*) d = 0; | |
03ebf5e8 DH |
2860 | *((uint8_t*) d + 1) = SD_BUS_TYPE_STRUCT_BEGIN; |
2861 | memcpy((uint8_t*) d + 2, signature, l); | |
2862 | *((uint8_t*) d + 1 + l + 1) = SD_BUS_TYPE_STRUCT_END; | |
2ac7c17f | 2863 | |
03ebf5e8 | 2864 | bus_gvariant_write_word_le((uint8_t*) d + 1 + l + 2, sz, sizeof(struct bus_header) + m->fields_size); |
2ac7c17f LP |
2865 | |
2866 | m->footer = d; | |
03ebf5e8 | 2867 | m->footer_accessible = 1 + l + 2 + sz; |
2ac7c17f LP |
2868 | } else { |
2869 | m->header->dbus1.fields_size = m->fields_size; | |
2870 | m->header->dbus1.body_size = m->body_size; | |
2871 | } | |
81389225 LP |
2872 | |
2873 | return 0; | |
2874 | } | |
2875 | ||
75bcbcf2 | 2876 | _public_ int sd_bus_message_seal(sd_bus_message *m, uint64_t cookie, uint64_t timeout_usec) { |
81389225 | 2877 | struct bus_body_part *part; |
2ac7c17f | 2878 | size_t a; |
81389225 LP |
2879 | unsigned i; |
2880 | int r; | |
2881 | ||
75bcbcf2 | 2882 | assert_return(m, -EINVAL); |
81389225 LP |
2883 | |
2884 | if (m->sealed) | |
2885 | return -EPERM; | |
2886 | ||
2887 | if (m->n_containers > 0) | |
2888 | return -EBADMSG; | |
2889 | ||
2890 | if (m->poisoned) | |
2891 | return -ESTALE; | |
2892 | ||
2ac7c17f LP |
2893 | if (cookie > 0xffffffffULL && |
2894 | !BUS_MESSAGE_IS_GVARIANT(m)) | |
15411c0c | 2895 | return -EOPNOTSUPP; |
2ac7c17f | 2896 | |
81389225 LP |
2897 | /* In vtables the return signature of method calls is listed, |
2898 | * let's check if they match if this is a response */ | |
2899 | if (m->header->type == SD_BUS_MESSAGE_METHOD_RETURN && | |
2900 | m->enforced_reply_signature && | |
2901 | !streq(strempty(m->root_container.signature), m->enforced_reply_signature)) | |
2902 | return -ENOMSG; | |
2903 | ||
2904 | /* If gvariant marshalling is used we need to close the body structure */ | |
2905 | r = bus_message_close_struct(m, &m->root_container, false); | |
2906 | if (r < 0) | |
2907 | return r; | |
2908 | ||
2ac7c17f LP |
2909 | /* If there's a non-trivial signature set, then add it in |
2910 | * here, but only on dbus1 */ | |
2911 | if (!isempty(m->root_container.signature) && !BUS_MESSAGE_IS_GVARIANT(m)) { | |
81389225 LP |
2912 | r = message_append_field_signature(m, BUS_MESSAGE_HEADER_SIGNATURE, m->root_container.signature, NULL); |
2913 | if (r < 0) | |
2914 | return r; | |
2915 | } | |
2916 | ||
2917 | if (m->n_fds > 0) { | |
2918 | r = message_append_field_uint32(m, BUS_MESSAGE_HEADER_UNIX_FDS, m->n_fds); | |
2919 | if (r < 0) | |
2920 | return r; | |
2921 | } | |
2922 | ||
2923 | r = bus_message_close_header(m); | |
2924 | if (r < 0) | |
2925 | return r; | |
2926 | ||
2ac7c17f LP |
2927 | if (BUS_MESSAGE_IS_GVARIANT(m)) |
2928 | m->header->dbus2.cookie = cookie; | |
2929 | else | |
2930 | m->header->dbus1.serial = (uint32_t) cookie; | |
2931 | ||
75bcbcf2 | 2932 | m->timeout = m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED ? 0 : timeout_usec; |
81389225 LP |
2933 | |
2934 | /* Add padding at the end of the fields part, since we know | |
2935 | * the body needs to start at an 8 byte alignment. We made | |
2936 | * sure we allocated enough space for this, so all we need to | |
2937 | * do here is to zero it out. */ | |
2ac7c17f | 2938 | a = ALIGN8(m->fields_size) - m->fields_size; |
81389225 | 2939 | if (a > 0) |
2ac7c17f | 2940 | memzero((uint8_t*) BUS_MESSAGE_FIELDS(m) + m->fields_size, a); |
81389225 LP |
2941 | |
2942 | /* If this is something we can send as memfd, then let's seal | |
2943 | the memfd now. Note that we can send memfds as payload only | |
2944 | for directed messages, and not for broadcasts. */ | |
2a0958d2 | 2945 | if (m->destination && m->bus->use_memfd) { |
81389225 | 2946 | MESSAGE_FOREACH_PART(part, i, m) |
2ac7c17f LP |
2947 | if (part->memfd >= 0 && |
2948 | !part->sealed && | |
2949 | (part->size > MEMFD_MIN_SIZE || m->bus->use_memfd < 0) && | |
2950 | part != m->body_end) { /* The last part may never be sent as memfd */ | |
8e959fbf LP |
2951 | uint64_t sz; |
2952 | ||
2953 | /* Try to seal it if that makes | |
2954 | * sense. First, unmap our own map to | |
2955 | * make sure we don't keep it busy. */ | |
81389225 LP |
2956 | bus_body_part_unmap(part); |
2957 | ||
8e959fbf LP |
2958 | /* Then, sync up real memfd size */ |
2959 | sz = part->size; | |
73843b52 LP |
2960 | r = memfd_set_size(part->memfd, sz); |
2961 | if (r < 0) | |
2962 | return r; | |
8e959fbf LP |
2963 | |
2964 | /* Finally, try to seal */ | |
73843b52 | 2965 | if (memfd_set_sealed(part->memfd) >= 0) |
81389225 LP |
2966 | part->sealed = true; |
2967 | } | |
2968 | } | |
2969 | ||
2ac7c17f | 2970 | m->root_container.end = m->user_body_size; |
81389225 LP |
2971 | m->root_container.index = 0; |
2972 | m->root_container.offset_index = 0; | |
2973 | m->root_container.item_size = m->root_container.n_offsets > 0 ? m->root_container.offsets[0] : 0; | |
2974 | ||
2975 | m->sealed = true; | |
2976 | ||
2977 | return 0; | |
2978 | } | |
2979 | ||
a392d361 | 2980 | int bus_body_part_map(struct bus_body_part *part) { |
453a0c29 | 2981 | void *p; |
7dcd79c2 | 2982 | size_t psz, shift; |
453a0c29 LP |
2983 | |
2984 | assert_se(part); | |
2985 | ||
2986 | if (part->data) | |
2987 | return 0; | |
2988 | ||
2989 | if (part->size <= 0) | |
2990 | return 0; | |
2991 | ||
1307c3ff LP |
2992 | /* For smaller zero parts (as used for padding) we don't need to map anything... */ |
2993 | if (part->memfd < 0 && part->is_zero && part->size < 8) { | |
2994 | static const uint8_t zeroes[7] = { }; | |
2995 | part->data = (void*) zeroes; | |
2996 | return 0; | |
2997 | } | |
2998 | ||
7dcd79c2 LP |
2999 | shift = part->memfd_offset - ((part->memfd_offset / page_size()) * page_size()); |
3000 | psz = PAGE_ALIGN(part->size + shift); | |
453a0c29 LP |
3001 | |
3002 | if (part->memfd >= 0) | |
7dcd79c2 | 3003 | p = mmap(NULL, psz, PROT_READ, MAP_PRIVATE, part->memfd, part->memfd_offset - shift); |
453a0c29 LP |
3004 | else if (part->is_zero) |
3005 | p = mmap(NULL, psz, PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
3006 | else | |
3007 | return -EINVAL; | |
3008 | ||
3009 | if (p == MAP_FAILED) | |
3010 | return -errno; | |
3011 | ||
3012 | part->mapped = psz; | |
7dcd79c2 LP |
3013 | part->mmap_begin = p; |
3014 | part->data = (uint8_t*) p + shift; | |
a392d361 LP |
3015 | part->munmap_this = true; |
3016 | ||
453a0c29 LP |
3017 | return 0; |
3018 | } | |
3019 | ||
a392d361 LP |
3020 | void bus_body_part_unmap(struct bus_body_part *part) { |
3021 | ||
3022 | assert_se(part); | |
3023 | ||
3024 | if (part->memfd < 0) | |
3025 | return; | |
3026 | ||
7dcd79c2 | 3027 | if (!part->mmap_begin) |
a392d361 LP |
3028 | return; |
3029 | ||
bf30e48f KS |
3030 | if (!part->munmap_this) |
3031 | return; | |
a392d361 | 3032 | |
7dcd79c2 | 3033 | assert_se(munmap(part->mmap_begin, part->mapped) == 0); |
a392d361 | 3034 | |
7dcd79c2 | 3035 | part->mmap_begin = NULL; |
a392d361 LP |
3036 | part->data = NULL; |
3037 | part->mapped = 0; | |
3038 | part->munmap_this = false; | |
3039 | ||
3040 | return; | |
3041 | } | |
3042 | ||
9a17484d | 3043 | static int buffer_peek(const void *p, uint32_t sz, size_t *rindex, size_t align, size_t nbytes, void **r) { |
bc7fd8cd | 3044 | size_t k, start, end; |
de1c301e | 3045 | |
9a17484d LP |
3046 | assert(rindex); |
3047 | assert(align > 0); | |
de1c301e | 3048 | |
9a17484d | 3049 | start = ALIGN_TO((size_t) *rindex, align); |
bc7fd8cd | 3050 | end = start + nbytes; |
9a17484d | 3051 | |
bc7fd8cd | 3052 | if (end > sz) |
9a17484d LP |
3053 | return -EBADMSG; |
3054 | ||
3055 | /* Verify that padding is 0 */ | |
3056 | for (k = *rindex; k < start; k++) | |
3057 | if (((const uint8_t*) p)[k] != 0) | |
3058 | return -EBADMSG; | |
3059 | ||
3060 | if (r) | |
3061 | *r = (uint8_t*) p + start; | |
3062 | ||
bc7fd8cd | 3063 | *rindex = end; |
9a17484d LP |
3064 | |
3065 | return 1; | |
de1c301e LP |
3066 | } |
3067 | ||
7b058942 LP |
3068 | static bool message_end_of_signature(sd_bus_message *m) { |
3069 | struct bus_container *c; | |
3070 | ||
3071 | assert(m); | |
3072 | ||
3073 | c = message_get_container(m); | |
3074 | return !c->signature || c->signature[c->index] == 0; | |
3075 | } | |
3076 | ||
9a17484d LP |
3077 | static bool message_end_of_array(sd_bus_message *m, size_t index) { |
3078 | struct bus_container *c; | |
de1c301e | 3079 | |
9a17484d | 3080 | assert(m); |
de1c301e | 3081 | |
9a17484d | 3082 | c = message_get_container(m); |
6647dc66 | 3083 | if (c->enclosing != SD_BUS_TYPE_ARRAY) |
9a17484d | 3084 | return false; |
de1c301e | 3085 | |
6647dc66 LP |
3086 | if (BUS_MESSAGE_IS_GVARIANT(m)) |
3087 | return index >= c->end; | |
3088 | else { | |
3089 | assert(c->array_size); | |
3090 | return index >= c->begin + BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
3091 | } | |
de1c301e LP |
3092 | } |
3093 | ||
1405bef3 | 3094 | _public_ int sd_bus_message_at_end(sd_bus_message *m, int complete) { |
7b058942 LP |
3095 | assert_return(m, -EINVAL); |
3096 | assert_return(m->sealed, -EPERM); | |
3097 | ||
3098 | if (complete && m->n_containers > 0) | |
3099 | return false; | |
3100 | ||
3101 | if (message_end_of_signature(m)) | |
3102 | return true; | |
3103 | ||
3104 | if (message_end_of_array(m, m->rindex)) | |
3105 | return true; | |
3106 | ||
3107 | return false; | |
3108 | } | |
3109 | ||
bc7fd8cd LP |
3110 | static struct bus_body_part* find_part(sd_bus_message *m, size_t index, size_t sz, void **p) { |
3111 | struct bus_body_part *part; | |
3112 | size_t begin; | |
453a0c29 LP |
3113 | int r; |
3114 | ||
bc7fd8cd LP |
3115 | assert(m); |
3116 | ||
3117 | if (m->cached_rindex_part && index >= m->cached_rindex_part_begin) { | |
3118 | part = m->cached_rindex_part; | |
3119 | begin = m->cached_rindex_part_begin; | |
3120 | } else { | |
3121 | part = &m->body; | |
3122 | begin = 0; | |
3123 | } | |
3124 | ||
3125 | while (part) { | |
3126 | if (index < begin) | |
3127 | return NULL; | |
3128 | ||
3129 | if (index + sz <= begin + part->size) { | |
453a0c29 | 3130 | |
a392d361 | 3131 | r = bus_body_part_map(part); |
453a0c29 LP |
3132 | if (r < 0) |
3133 | return NULL; | |
3134 | ||
bc7fd8cd | 3135 | if (p) |
453a0c29 | 3136 | *p = (uint8_t*) part->data + index - begin; |
bc7fd8cd LP |
3137 | |
3138 | m->cached_rindex_part = part; | |
3139 | m->cached_rindex_part_begin = begin; | |
3140 | ||
3141 | return part; | |
3142 | } | |
3143 | ||
453a0c29 | 3144 | begin += part->size; |
bc7fd8cd LP |
3145 | part = part->next; |
3146 | } | |
3147 | ||
3148 | return NULL; | |
3149 | } | |
3150 | ||
6647dc66 LP |
3151 | static int container_next_item(sd_bus_message *m, struct bus_container *c, size_t *rindex) { |
3152 | int r; | |
3153 | ||
3154 | assert(m); | |
3155 | assert(c); | |
3156 | assert(rindex); | |
3157 | ||
3158 | if (!BUS_MESSAGE_IS_GVARIANT(m)) | |
3159 | return 0; | |
3160 | ||
3161 | if (c->enclosing == SD_BUS_TYPE_ARRAY) { | |
3162 | int sz; | |
3163 | ||
3164 | sz = bus_gvariant_get_size(c->signature); | |
3165 | if (sz < 0) { | |
3166 | int alignment; | |
3167 | ||
3168 | if (c->offset_index+1 >= c->n_offsets) | |
3169 | goto end; | |
3170 | ||
3171 | /* Variable-size array */ | |
3172 | ||
3173 | alignment = bus_gvariant_get_alignment(c->signature); | |
3174 | assert(alignment > 0); | |
3175 | ||
3176 | *rindex = ALIGN_TO(c->offsets[c->offset_index], alignment); | |
3177 | c->item_size = c->offsets[c->offset_index+1] - *rindex; | |
3178 | } else { | |
0039a203 LP |
3179 | |
3180 | if (c->offset_index+1 >= (c->end-c->begin)/sz) | |
3181 | goto end; | |
3182 | ||
6647dc66 | 3183 | /* Fixed-size array */ |
0039a203 | 3184 | *rindex = c->begin + (c->offset_index+1) * sz; |
6647dc66 LP |
3185 | c->item_size = sz; |
3186 | } | |
3187 | ||
3188 | c->offset_index++; | |
3189 | ||
945c2931 | 3190 | } else if (IN_SET(c->enclosing, 0, SD_BUS_TYPE_STRUCT, SD_BUS_TYPE_DICT_ENTRY)) { |
6647dc66 LP |
3191 | |
3192 | int alignment; | |
3193 | size_t n, j; | |
3194 | ||
3195 | if (c->offset_index+1 >= c->n_offsets) | |
3196 | goto end; | |
3197 | ||
3198 | r = signature_element_length(c->signature + c->index, &n); | |
3199 | if (r < 0) | |
3200 | return r; | |
3201 | ||
3202 | r = signature_element_length(c->signature + c->index + n, &j); | |
3203 | if (r < 0) | |
3204 | return r; | |
3205 | else { | |
3206 | char t[j+1]; | |
3207 | memcpy(t, c->signature + c->index + n, j); | |
3208 | t[j] = 0; | |
3209 | ||
3210 | alignment = bus_gvariant_get_alignment(t); | |
3211 | } | |
3212 | ||
3213 | assert(alignment > 0); | |
3214 | ||
3215 | *rindex = ALIGN_TO(c->offsets[c->offset_index], alignment); | |
3216 | c->item_size = c->offsets[c->offset_index+1] - *rindex; | |
3217 | ||
3218 | c->offset_index++; | |
3219 | ||
3220 | } else if (c->enclosing == SD_BUS_TYPE_VARIANT) | |
3221 | goto end; | |
3222 | else | |
3223 | assert_not_reached("Unknown container type"); | |
3224 | ||
3225 | return 0; | |
3226 | ||
3227 | end: | |
3228 | /* Reached the end */ | |
3229 | *rindex = c->end; | |
3230 | c->item_size = 0; | |
3231 | return 0; | |
3232 | } | |
3233 | ||
3234 | ||
bc7fd8cd LP |
3235 | static int message_peek_body( |
3236 | sd_bus_message *m, | |
3237 | size_t *rindex, | |
3238 | size_t align, | |
3239 | size_t nbytes, | |
3240 | void **ret) { | |
3241 | ||
3242 | size_t k, start, end, padding; | |
3243 | struct bus_body_part *part; | |
3244 | uint8_t *q; | |
3245 | ||
de1c301e | 3246 | assert(m); |
9a17484d LP |
3247 | assert(rindex); |
3248 | assert(align > 0); | |
de1c301e | 3249 | |
bc7fd8cd LP |
3250 | start = ALIGN_TO((size_t) *rindex, align); |
3251 | padding = start - *rindex; | |
3252 | end = start + nbytes; | |
3253 | ||
2ac7c17f | 3254 | if (end > m->user_body_size) |
bc7fd8cd LP |
3255 | return -EBADMSG; |
3256 | ||
3257 | part = find_part(m, *rindex, padding, (void**) &q); | |
3258 | if (!part) | |
3259 | return -EBADMSG; | |
3260 | ||
3261 | if (q) { | |
3262 | /* Verify padding */ | |
3263 | for (k = 0; k < padding; k++) | |
3264 | if (q[k] != 0) | |
3265 | return -EBADMSG; | |
3266 | } | |
3267 | ||
3268 | part = find_part(m, start, nbytes, (void**) &q); | |
5f7e8903 | 3269 | if (!part || (nbytes > 0 && !q)) |
bc7fd8cd LP |
3270 | return -EBADMSG; |
3271 | ||
3272 | *rindex = end; | |
3273 | ||
3274 | if (ret) | |
3275 | *ret = q; | |
3276 | ||
18f5b48f | 3277 | return 0; |
9a17484d | 3278 | } |
de1c301e | 3279 | |
ac89bf1d | 3280 | static bool validate_nul(const char *s, size_t l) { |
de1c301e | 3281 | |
9a17484d LP |
3282 | /* Check for NUL chars in the string */ |
3283 | if (memchr(s, 0, l)) | |
3284 | return false; | |
de1c301e | 3285 | |
9a17484d LP |
3286 | /* Check for NUL termination */ |
3287 | if (s[l] != 0) | |
3288 | return false; | |
de1c301e | 3289 | |
ac89bf1d LP |
3290 | return true; |
3291 | } | |
3292 | ||
3293 | static bool validate_string(const char *s, size_t l) { | |
3294 | ||
3295 | if (!validate_nul(s, l)) | |
3296 | return false; | |
3297 | ||
9a17484d LP |
3298 | /* Check if valid UTF8 */ |
3299 | if (!utf8_is_valid(s)) | |
3300 | return false; | |
3301 | ||
3302 | return true; | |
de1c301e LP |
3303 | } |
3304 | ||
9a17484d | 3305 | static bool validate_signature(const char *s, size_t l) { |
de1c301e | 3306 | |
ac89bf1d | 3307 | if (!validate_nul(s, l)) |
9a17484d | 3308 | return false; |
de1c301e | 3309 | |
9a17484d LP |
3310 | /* Check if valid signature */ |
3311 | if (!signature_is_valid(s, true)) | |
3312 | return false; | |
3313 | ||
3314 | return true; | |
3315 | } | |
3316 | ||
ac89bf1d LP |
3317 | static bool validate_object_path(const char *s, size_t l) { |
3318 | ||
3319 | if (!validate_nul(s, l)) | |
3320 | return false; | |
3321 | ||
3322 | if (!object_path_is_valid(s)) | |
3323 | return false; | |
3324 | ||
3325 | return true; | |
3326 | } | |
3327 | ||
d9f644e2 | 3328 | _public_ int sd_bus_message_read_basic(sd_bus_message *m, char type, void *p) { |
9a17484d | 3329 | struct bus_container *c; |
6647dc66 | 3330 | size_t rindex; |
9a17484d | 3331 | void *q; |
0dcd14b9 | 3332 | int r; |
9a17484d | 3333 | |
9d6c7c82 LP |
3334 | assert_return(m, -EINVAL); |
3335 | assert_return(m->sealed, -EPERM); | |
3336 | assert_return(bus_type_is_basic(type), -EINVAL); | |
de1c301e | 3337 | |
7b058942 | 3338 | if (message_end_of_signature(m)) |
430fb8fa | 3339 | return -ENXIO; |
9a17484d | 3340 | |
1daf8121 LP |
3341 | if (message_end_of_array(m, m->rindex)) |
3342 | return 0; | |
3343 | ||
7b058942 | 3344 | c = message_get_container(m); |
9a17484d LP |
3345 | if (c->signature[c->index] != type) |
3346 | return -ENXIO; | |
3347 | ||
6647dc66 | 3348 | rindex = m->rindex; |
9a17484d | 3349 | |
6647dc66 | 3350 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
9a17484d | 3351 | |
6647dc66 LP |
3352 | if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE)) { |
3353 | bool ok; | |
9a17484d | 3354 | |
6647dc66 | 3355 | r = message_peek_body(m, &rindex, 1, c->item_size, &q); |
18f5b48f | 3356 | if (r < 0) |
6647dc66 LP |
3357 | return r; |
3358 | ||
3359 | if (type == SD_BUS_TYPE_STRING) | |
3360 | ok = validate_string(q, c->item_size-1); | |
3361 | else if (type == SD_BUS_TYPE_OBJECT_PATH) | |
3362 | ok = validate_object_path(q, c->item_size-1); | |
3363 | else | |
3364 | ok = validate_signature(q, c->item_size-1); | |
9a17484d | 3365 | |
6647dc66 | 3366 | if (!ok) |
ac89bf1d | 3367 | return -EBADMSG; |
6647dc66 LP |
3368 | |
3369 | if (p) | |
3370 | *(const char**) p = q; | |
ac89bf1d | 3371 | } else { |
6647dc66 LP |
3372 | int sz, align; |
3373 | ||
3374 | sz = bus_gvariant_get_size(CHAR_TO_STR(type)); | |
3375 | assert(sz > 0); | |
3376 | if ((size_t) sz != c->item_size) | |
ac89bf1d | 3377 | return -EBADMSG; |
9a17484d | 3378 | |
6647dc66 LP |
3379 | align = bus_gvariant_get_alignment(CHAR_TO_STR(type)); |
3380 | assert(align > 0); | |
0dcd14b9 | 3381 | |
6647dc66 | 3382 | r = message_peek_body(m, &rindex, align, c->item_size, &q); |
18f5b48f | 3383 | if (r < 0) |
6647dc66 | 3384 | return r; |
de1c301e | 3385 | |
6647dc66 | 3386 | switch (type) { |
9a17484d | 3387 | |
6647dc66 LP |
3388 | case SD_BUS_TYPE_BYTE: |
3389 | if (p) | |
3390 | *(uint8_t*) p = *(uint8_t*) q; | |
3391 | break; | |
9a17484d | 3392 | |
6647dc66 LP |
3393 | case SD_BUS_TYPE_BOOLEAN: |
3394 | if (p) | |
3395 | *(int*) p = !!*(uint8_t*) q; | |
3396 | break; | |
9a17484d | 3397 | |
6647dc66 LP |
3398 | case SD_BUS_TYPE_INT16: |
3399 | case SD_BUS_TYPE_UINT16: | |
3400 | if (p) | |
3401 | *(uint16_t*) p = BUS_MESSAGE_BSWAP16(m, *(uint16_t*) q); | |
3402 | break; | |
3403 | ||
3404 | case SD_BUS_TYPE_INT32: | |
3405 | case SD_BUS_TYPE_UINT32: | |
3406 | if (p) | |
3407 | *(uint32_t*) p = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3408 | break; | |
9a17484d | 3409 | |
6647dc66 LP |
3410 | case SD_BUS_TYPE_INT64: |
3411 | case SD_BUS_TYPE_UINT64: | |
3412 | case SD_BUS_TYPE_DOUBLE: | |
3413 | if (p) | |
3414 | *(uint64_t*) p = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q); | |
3415 | break; | |
0dcd14b9 | 3416 | |
6647dc66 LP |
3417 | case SD_BUS_TYPE_UNIX_FD: { |
3418 | uint32_t j; | |
de1c301e | 3419 | |
6647dc66 LP |
3420 | j = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); |
3421 | if (j >= m->n_fds) | |
3422 | return -EBADMSG; | |
de1c301e | 3423 | |
6647dc66 LP |
3424 | if (p) |
3425 | *(int*) p = m->fds[j]; | |
de1c301e | 3426 | |
6647dc66 LP |
3427 | break; |
3428 | } | |
3429 | ||
3430 | default: | |
3431 | assert_not_reached("unexpected type"); | |
3432 | } | |
3433 | } | |
3434 | ||
3435 | r = container_next_item(m, c, &rindex); | |
3436 | if (r < 0) | |
9a17484d | 3437 | return r; |
6647dc66 | 3438 | } else { |
9a17484d | 3439 | |
6647dc66 LP |
3440 | if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH)) { |
3441 | uint32_t l; | |
3442 | bool ok; | |
9a17484d | 3443 | |
6647dc66 | 3444 | r = message_peek_body(m, &rindex, 4, 4, &q); |
18f5b48f | 3445 | if (r < 0) |
6647dc66 | 3446 | return r; |
9a17484d | 3447 | |
6647dc66 LP |
3448 | l = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); |
3449 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
3450 | if (r < 0) | |
3451 | return r; | |
9a17484d | 3452 | |
6647dc66 LP |
3453 | if (type == SD_BUS_TYPE_OBJECT_PATH) |
3454 | ok = validate_object_path(q, l); | |
3455 | else | |
3456 | ok = validate_string(q, l); | |
3457 | if (!ok) | |
3458 | return -EBADMSG; | |
9a17484d | 3459 | |
0dcd14b9 | 3460 | if (p) |
6647dc66 | 3461 | *(const char**) p = q; |
9a17484d | 3462 | |
6647dc66 LP |
3463 | } else if (type == SD_BUS_TYPE_SIGNATURE) { |
3464 | uint8_t l; | |
3465 | ||
3466 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
18f5b48f | 3467 | if (r < 0) |
6647dc66 LP |
3468 | return r; |
3469 | ||
3470 | l = *(uint8_t*) q; | |
3471 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
3472 | if (r < 0) | |
3473 | return r; | |
2c93b4ef | 3474 | |
6647dc66 | 3475 | if (!validate_signature(q, l)) |
2c93b4ef LP |
3476 | return -EBADMSG; |
3477 | ||
0dcd14b9 | 3478 | if (p) |
6647dc66 | 3479 | *(const char**) p = q; |
2c93b4ef | 3480 | |
6647dc66 LP |
3481 | } else { |
3482 | ssize_t sz, align; | |
9a17484d | 3483 | |
6647dc66 LP |
3484 | align = bus_type_get_alignment(type); |
3485 | assert(align > 0); | |
2c93b4ef | 3486 | |
6647dc66 LP |
3487 | sz = bus_type_get_size(type); |
3488 | assert(sz > 0); | |
3489 | ||
3490 | r = message_peek_body(m, &rindex, align, sz, &q); | |
18f5b48f | 3491 | if (r < 0) |
6647dc66 LP |
3492 | return r; |
3493 | ||
3494 | switch (type) { | |
3495 | ||
3496 | case SD_BUS_TYPE_BYTE: | |
3497 | if (p) | |
3498 | *(uint8_t*) p = *(uint8_t*) q; | |
3499 | break; | |
3500 | ||
3501 | case SD_BUS_TYPE_BOOLEAN: | |
3502 | if (p) | |
3503 | *(int*) p = !!*(uint32_t*) q; | |
3504 | break; | |
3505 | ||
3506 | case SD_BUS_TYPE_INT16: | |
3507 | case SD_BUS_TYPE_UINT16: | |
3508 | if (p) | |
3509 | *(uint16_t*) p = BUS_MESSAGE_BSWAP16(m, *(uint16_t*) q); | |
3510 | break; | |
3511 | ||
3512 | case SD_BUS_TYPE_INT32: | |
3513 | case SD_BUS_TYPE_UINT32: | |
3514 | if (p) | |
3515 | *(uint32_t*) p = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3516 | break; | |
3517 | ||
3518 | case SD_BUS_TYPE_INT64: | |
3519 | case SD_BUS_TYPE_UINT64: | |
3520 | case SD_BUS_TYPE_DOUBLE: | |
3521 | if (p) | |
3522 | *(uint64_t*) p = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q); | |
3523 | break; | |
3524 | ||
3525 | case SD_BUS_TYPE_UNIX_FD: { | |
3526 | uint32_t j; | |
3527 | ||
3528 | j = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3529 | if (j >= m->n_fds) | |
3530 | return -EBADMSG; | |
3531 | ||
3532 | if (p) | |
3533 | *(int*) p = m->fds[j]; | |
3534 | break; | |
3535 | } | |
3536 | ||
3537 | default: | |
3538 | assert_not_reached("Unknown basic type..."); | |
3539 | } | |
3540 | } | |
9a17484d LP |
3541 | } |
3542 | ||
6647dc66 LP |
3543 | m->rindex = rindex; |
3544 | ||
9a17484d LP |
3545 | if (c->enclosing != SD_BUS_TYPE_ARRAY) |
3546 | c->index++; | |
3547 | ||
3548 | return 1; | |
de1c301e LP |
3549 | } |
3550 | ||
9a17484d LP |
3551 | static int bus_message_enter_array( |
3552 | sd_bus_message *m, | |
3553 | struct bus_container *c, | |
3554 | const char *contents, | |
6647dc66 LP |
3555 | uint32_t **array_size, |
3556 | size_t *item_size, | |
3557 | size_t **offsets, | |
3558 | size_t *n_offsets) { | |
9a17484d LP |
3559 | |
3560 | size_t rindex; | |
3561 | void *q; | |
3562 | int r, alignment; | |
3563 | ||
3564 | assert(m); | |
3565 | assert(c); | |
3566 | assert(contents); | |
3567 | assert(array_size); | |
6647dc66 LP |
3568 | assert(item_size); |
3569 | assert(offsets); | |
3570 | assert(n_offsets); | |
9a17484d | 3571 | |
29ddb38f | 3572 | if (!signature_is_single(contents, true)) |
de1c301e | 3573 | return -EINVAL; |
9a17484d | 3574 | |
9a17484d | 3575 | if (!c->signature || c->signature[c->index] == 0) |
6647dc66 | 3576 | return -ENXIO; |
9a17484d LP |
3577 | |
3578 | if (c->signature[c->index] != SD_BUS_TYPE_ARRAY) | |
3579 | return -ENXIO; | |
3580 | ||
3581 | if (!startswith(c->signature + c->index + 1, contents)) | |
3582 | return -ENXIO; | |
3583 | ||
3584 | rindex = m->rindex; | |
9a17484d | 3585 | |
6647dc66 LP |
3586 | if (!BUS_MESSAGE_IS_GVARIANT(m)) { |
3587 | /* dbus1 */ | |
9a17484d | 3588 | |
6647dc66 | 3589 | r = message_peek_body(m, &rindex, 4, 4, &q); |
18f5b48f | 3590 | if (r < 0) |
6647dc66 | 3591 | return r; |
9a17484d | 3592 | |
6647dc66 LP |
3593 | if (BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q) > BUS_ARRAY_MAX_SIZE) |
3594 | return -EBADMSG; | |
9a17484d | 3595 | |
6647dc66 LP |
3596 | alignment = bus_type_get_alignment(contents[0]); |
3597 | if (alignment < 0) | |
3598 | return alignment; | |
3599 | ||
3600 | r = message_peek_body(m, &rindex, alignment, 0, NULL); | |
3601 | if (r < 0) | |
3602 | return r; | |
6647dc66 LP |
3603 | |
3604 | *array_size = (uint32_t*) q; | |
3605 | ||
3606 | } else if (c->item_size <= 0) { | |
3607 | ||
3608 | /* gvariant: empty array */ | |
3609 | *item_size = 0; | |
3610 | *offsets = NULL; | |
3611 | *n_offsets = 0; | |
3612 | ||
3613 | } else if (bus_gvariant_is_fixed_size(contents)) { | |
3614 | ||
3615 | /* gvariant: fixed length array */ | |
3616 | *item_size = bus_gvariant_get_size(contents); | |
3617 | *offsets = NULL; | |
3618 | *n_offsets = 0; | |
3619 | ||
3620 | } else { | |
3621 | size_t where, p = 0, framing, sz; | |
3622 | unsigned i; | |
3623 | ||
3624 | /* gvariant: variable length array */ | |
2ac7c17f | 3625 | sz = bus_gvariant_determine_word_size(c->item_size, 0); |
6647dc66 LP |
3626 | |
3627 | where = rindex + c->item_size - sz; | |
3628 | r = message_peek_body(m, &where, 1, sz, &q); | |
3629 | if (r < 0) | |
3630 | return r; | |
6647dc66 | 3631 | |
2ac7c17f | 3632 | framing = bus_gvariant_read_word_le(q, sz); |
6647dc66 LP |
3633 | if (framing > c->item_size - sz) |
3634 | return -EBADMSG; | |
3635 | if ((c->item_size - framing) % sz != 0) | |
3636 | return -EBADMSG; | |
3637 | ||
3638 | *n_offsets = (c->item_size - framing) / sz; | |
3639 | ||
3640 | where = rindex + framing; | |
3641 | r = message_peek_body(m, &where, 1, *n_offsets * sz, &q); | |
3642 | if (r < 0) | |
3643 | return r; | |
6647dc66 LP |
3644 | |
3645 | *offsets = new(size_t, *n_offsets); | |
3646 | if (!*offsets) | |
3647 | return -ENOMEM; | |
3648 | ||
3649 | for (i = 0; i < *n_offsets; i++) { | |
3650 | size_t x; | |
3651 | ||
2ac7c17f | 3652 | x = bus_gvariant_read_word_le((uint8_t*) q + i * sz, sz); |
6647dc66 LP |
3653 | if (x > c->item_size - sz) |
3654 | return -EBADMSG; | |
3655 | if (x < p) | |
3656 | return -EBADMSG; | |
3657 | ||
3658 | (*offsets)[i] = rindex + x; | |
3659 | p = x; | |
3660 | } | |
3661 | ||
3662 | *item_size = (*offsets)[0] - rindex; | |
3663 | } | |
3664 | ||
3665 | m->rindex = rindex; | |
3666 | ||
3667 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3668 | c->index += 1 + strlen(contents); | |
9a17484d LP |
3669 | |
3670 | return 1; | |
3671 | } | |
3672 | ||
3673 | static int bus_message_enter_variant( | |
3674 | sd_bus_message *m, | |
3675 | struct bus_container *c, | |
6647dc66 LP |
3676 | const char *contents, |
3677 | size_t *item_size) { | |
9a17484d LP |
3678 | |
3679 | size_t rindex; | |
3680 | uint8_t l; | |
3681 | void *q; | |
3682 | int r; | |
3683 | ||
3684 | assert(m); | |
3685 | assert(c); | |
3686 | assert(contents); | |
6647dc66 | 3687 | assert(item_size); |
9a17484d | 3688 | |
29ddb38f | 3689 | if (!signature_is_single(contents, false)) |
de1c301e | 3690 | return -EINVAL; |
de1c301e | 3691 | |
9a17484d LP |
3692 | if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN) |
3693 | return -EINVAL; | |
3694 | ||
3695 | if (!c->signature || c->signature[c->index] == 0) | |
6647dc66 | 3696 | return -ENXIO; |
9a17484d LP |
3697 | |
3698 | if (c->signature[c->index] != SD_BUS_TYPE_VARIANT) | |
3699 | return -ENXIO; | |
3700 | ||
3701 | rindex = m->rindex; | |
9a17484d | 3702 | |
6647dc66 LP |
3703 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
3704 | size_t k, where; | |
3705 | ||
3706 | k = strlen(contents); | |
3707 | if (1+k > c->item_size) | |
3708 | return -EBADMSG; | |
3709 | ||
3710 | where = rindex + c->item_size - (1+k); | |
3711 | r = message_peek_body(m, &where, 1, 1+k, &q); | |
3712 | if (r < 0) | |
3713 | return r; | |
6647dc66 LP |
3714 | |
3715 | if (*(char*) q != 0) | |
3716 | return -EBADMSG; | |
3717 | ||
3718 | if (memcmp((uint8_t*) q+1, contents, k)) | |
3719 | return -ENXIO; | |
3720 | ||
3721 | *item_size = c->item_size - (1+k); | |
3722 | ||
3723 | } else { | |
3724 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
3725 | if (r < 0) | |
3726 | return r; | |
6647dc66 LP |
3727 | |
3728 | l = *(uint8_t*) q; | |
3729 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
3730 | if (r < 0) | |
3731 | return r; | |
6647dc66 LP |
3732 | |
3733 | if (!validate_signature(q, l)) | |
3734 | return -EBADMSG; | |
3735 | ||
3736 | if (!streq(q, contents)) | |
3737 | return -ENXIO; | |
3738 | } | |
3739 | ||
3740 | m->rindex = rindex; | |
3741 | ||
3742 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3743 | c->index++; | |
3744 | ||
3745 | return 1; | |
3746 | } | |
3747 | ||
3748 | static int build_struct_offsets( | |
3749 | sd_bus_message *m, | |
3750 | const char *signature, | |
3751 | size_t size, | |
3752 | size_t *item_size, | |
3753 | size_t **offsets, | |
3754 | size_t *n_offsets) { | |
3755 | ||
3756 | unsigned n_variable = 0, n_total = 0, v; | |
3757 | size_t previous = 0, where; | |
3758 | const char *p; | |
3759 | size_t sz; | |
3760 | void *q; | |
3761 | int r; | |
3762 | ||
3763 | assert(m); | |
6647dc66 LP |
3764 | assert(item_size); |
3765 | assert(offsets); | |
3766 | assert(n_offsets); | |
3767 | ||
d6385068 | 3768 | if (isempty(signature)) { |
e53d21d0 DH |
3769 | /* Unary type is encoded as *fixed* 1 byte padding */ |
3770 | r = message_peek_body(m, &m->rindex, 1, 1, &q); | |
3771 | if (r < 0) | |
3772 | return r; | |
3773 | ||
3774 | if (*(uint8_t *) q != 0) | |
3775 | return -EBADMSG; | |
3776 | ||
d6385068 LP |
3777 | *item_size = 0; |
3778 | *offsets = NULL; | |
3779 | *n_offsets = 0; | |
3780 | return 0; | |
3781 | } | |
3782 | ||
2ac7c17f | 3783 | sz = bus_gvariant_determine_word_size(size, 0); |
d6385068 LP |
3784 | if (sz <= 0) |
3785 | return -EBADMSG; | |
6647dc66 LP |
3786 | |
3787 | /* First, loop over signature and count variable elements and | |
3788 | * elements in general. We use this to know how large the | |
3789 | * offset array is at the end of the structure. Note that | |
3790 | * GVariant only stores offsets for all variable size elements | |
3791 | * that are not the last item. */ | |
3792 | ||
3793 | p = signature; | |
3794 | while (*p != 0) { | |
3795 | size_t n; | |
3796 | ||
3797 | r = signature_element_length(p, &n); | |
3798 | if (r < 0) | |
3799 | return r; | |
3800 | else { | |
3801 | char t[n+1]; | |
3802 | ||
3803 | memcpy(t, p, n); | |
3804 | t[n] = 0; | |
3805 | ||
3806 | r = bus_gvariant_is_fixed_size(t); | |
3807 | } | |
3808 | ||
3809 | if (r < 0) | |
3810 | return r; | |
3811 | if (r == 0 && p[n] != 0) /* except the last item */ | |
313cefa1 | 3812 | n_variable++; |
6647dc66 LP |
3813 | n_total++; |
3814 | ||
3815 | p += n; | |
3816 | } | |
3817 | ||
3818 | if (size < n_variable * sz) | |
3819 | return -EBADMSG; | |
3820 | ||
3821 | where = m->rindex + size - (n_variable * sz); | |
3822 | r = message_peek_body(m, &where, 1, n_variable * sz, &q); | |
9a17484d LP |
3823 | if (r < 0) |
3824 | return r; | |
9a17484d | 3825 | |
6647dc66 | 3826 | v = n_variable; |
9a17484d | 3827 | |
6647dc66 LP |
3828 | *offsets = new(size_t, n_total); |
3829 | if (!*offsets) | |
3830 | return -ENOMEM; | |
9a17484d | 3831 | |
6647dc66 | 3832 | *n_offsets = 0; |
9a17484d | 3833 | |
6647dc66 LP |
3834 | /* Second, loop again and build an offset table */ |
3835 | p = signature; | |
3836 | while (*p != 0) { | |
3837 | size_t n, offset; | |
3838 | int k; | |
9a17484d | 3839 | |
6647dc66 LP |
3840 | r = signature_element_length(p, &n); |
3841 | if (r < 0) | |
3842 | return r; | |
3843 | else { | |
3844 | char t[n+1]; | |
3845 | ||
3846 | memcpy(t, p, n); | |
3847 | t[n] = 0; | |
3848 | ||
3849 | k = bus_gvariant_get_size(t); | |
3850 | if (k < 0) { | |
3851 | size_t x; | |
3852 | ||
3853 | /* variable size */ | |
3854 | if (v > 0) { | |
3855 | v--; | |
3856 | ||
2ac7c17f | 3857 | x = bus_gvariant_read_word_le((uint8_t*) q + v*sz, sz); |
6647dc66 LP |
3858 | if (x >= size) |
3859 | return -EBADMSG; | |
3860 | if (m->rindex + x < previous) | |
3861 | return -EBADMSG; | |
3862 | } else | |
3863 | /* The last item's end | |
3864 | * is determined from | |
3865 | * the start of the | |
3866 | * offset array */ | |
3867 | x = size - (n_variable * sz); | |
3868 | ||
3869 | offset = m->rindex + x; | |
3870 | ||
3871 | } else { | |
3872 | size_t align; | |
3873 | ||
3874 | /* fixed size */ | |
3875 | align = bus_gvariant_get_alignment(t); | |
3876 | assert(align > 0); | |
3877 | ||
3878 | offset = (*n_offsets == 0 ? m->rindex : ALIGN_TO((*offsets)[*n_offsets-1], align)) + k; | |
3879 | } | |
3880 | } | |
3881 | ||
3882 | previous = (*offsets)[(*n_offsets)++] = offset; | |
3883 | p += n; | |
3884 | } | |
3885 | ||
3886 | assert(v == 0); | |
3887 | assert(*n_offsets == n_total); | |
3888 | ||
3889 | *item_size = (*offsets)[0] - m->rindex; | |
3890 | return 0; | |
3891 | } | |
3892 | ||
3893 | static int enter_struct_or_dict_entry( | |
3894 | sd_bus_message *m, | |
3895 | struct bus_container *c, | |
3896 | const char *contents, | |
3897 | size_t *item_size, | |
3898 | size_t **offsets, | |
3899 | size_t *n_offsets) { | |
3900 | ||
3901 | int r; | |
3902 | ||
3903 | assert(m); | |
3904 | assert(c); | |
3905 | assert(contents); | |
3906 | assert(item_size); | |
3907 | assert(offsets); | |
3908 | assert(n_offsets); | |
3909 | ||
3910 | if (!BUS_MESSAGE_IS_GVARIANT(m)) { | |
3911 | ||
3912 | /* dbus1 */ | |
3913 | r = message_peek_body(m, &m->rindex, 8, 0, NULL); | |
18f5b48f | 3914 | if (r < 0) |
6647dc66 LP |
3915 | return r; |
3916 | ||
6647dc66 LP |
3917 | } else |
3918 | /* gvariant with contents */ | |
3919 | return build_struct_offsets(m, contents, c->item_size, item_size, offsets, n_offsets); | |
3920 | ||
3921 | return 0; | |
de1c301e LP |
3922 | } |
3923 | ||
9a17484d LP |
3924 | static int bus_message_enter_struct( |
3925 | sd_bus_message *m, | |
3926 | struct bus_container *c, | |
6647dc66 LP |
3927 | const char *contents, |
3928 | size_t *item_size, | |
3929 | size_t **offsets, | |
3930 | size_t *n_offsets) { | |
9a17484d LP |
3931 | |
3932 | size_t l; | |
3933 | int r; | |
3934 | ||
3935 | assert(m); | |
3936 | assert(c); | |
3937 | assert(contents); | |
6647dc66 LP |
3938 | assert(item_size); |
3939 | assert(offsets); | |
3940 | assert(n_offsets); | |
9a17484d LP |
3941 | |
3942 | if (!signature_is_valid(contents, false)) | |
3943 | return -EINVAL; | |
3944 | ||
3945 | if (!c->signature || c->signature[c->index] == 0) | |
6647dc66 | 3946 | return -ENXIO; |
9a17484d LP |
3947 | |
3948 | l = strlen(contents); | |
3949 | ||
3950 | if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN || | |
3951 | !startswith(c->signature + c->index + 1, contents) || | |
3952 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END) | |
3953 | return -ENXIO; | |
3954 | ||
6647dc66 LP |
3955 | r = enter_struct_or_dict_entry(m, c, contents, item_size, offsets, n_offsets); |
3956 | if (r < 0) | |
9a17484d LP |
3957 | return r; |
3958 | ||
3959 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3960 | c->index += 1 + l + 1; | |
3961 | ||
3962 | return 1; | |
3963 | } | |
3964 | ||
3965 | static int bus_message_enter_dict_entry( | |
3966 | sd_bus_message *m, | |
3967 | struct bus_container *c, | |
6647dc66 LP |
3968 | const char *contents, |
3969 | size_t *item_size, | |
3970 | size_t **offsets, | |
3971 | size_t *n_offsets) { | |
9a17484d LP |
3972 | |
3973 | size_t l; | |
3974 | int r; | |
3975 | ||
3976 | assert(m); | |
3977 | assert(c); | |
3978 | assert(contents); | |
3979 | ||
3980 | if (!signature_is_pair(contents)) | |
3981 | return -EINVAL; | |
3982 | ||
3983 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3984 | return -ENXIO; | |
3985 | ||
3986 | if (!c->signature || c->signature[c->index] == 0) | |
3987 | return 0; | |
3988 | ||
3989 | l = strlen(contents); | |
3990 | ||
3991 | if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN || | |
3992 | !startswith(c->signature + c->index + 1, contents) || | |
3993 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END) | |
3994 | return -ENXIO; | |
3995 | ||
6647dc66 LP |
3996 | r = enter_struct_or_dict_entry(m, c, contents, item_size, offsets, n_offsets); |
3997 | if (r < 0) | |
9a17484d LP |
3998 | return r; |
3999 | ||
4000 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
4001 | c->index += 1 + l + 1; | |
4002 | ||
4003 | return 1; | |
4004 | } | |
4005 | ||
d9f644e2 ZJS |
4006 | _public_ int sd_bus_message_enter_container(sd_bus_message *m, |
4007 | char type, | |
4008 | const char *contents) { | |
9a17484d LP |
4009 | struct bus_container *c, *w; |
4010 | uint32_t *array_size = NULL; | |
4011 | char *signature; | |
b3af9646 | 4012 | size_t before; |
6647dc66 LP |
4013 | size_t *offsets = NULL; |
4014 | size_t n_offsets = 0, item_size = 0; | |
9a17484d LP |
4015 | int r; |
4016 | ||
275b39fe LP |
4017 | assert_return(m, -EINVAL); |
4018 | assert_return(m->sealed, -EPERM); | |
4019 | assert_return(type != 0 || !contents, -EINVAL); | |
4020 | ||
4021 | if (type == 0 || !contents) { | |
4022 | const char *cc; | |
4023 | char tt; | |
4024 | ||
4025 | /* Allow entering into anonymous containers */ | |
4026 | r = sd_bus_message_peek_type(m, &tt, &cc); | |
18f5b48f | 4027 | if (r < 0) |
275b39fe LP |
4028 | return r; |
4029 | ||
4030 | if (type != 0 && type != tt) | |
4031 | return -ENXIO; | |
4032 | ||
4033 | if (contents && !streq(contents, cc)) | |
4034 | return -ENXIO; | |
4035 | ||
4036 | type = tt; | |
4037 | contents = cc; | |
4038 | } | |
9a17484d | 4039 | |
ed205a6b LP |
4040 | /* |
4041 | * We enforce a global limit on container depth, that is much | |
4042 | * higher than the 32 structs and 32 arrays the specification | |
4043 | * mandates. This is simpler to implement for us, and we need | |
4044 | * this only to ensure our container array doesn't grow | |
4045 | * without bounds. We are happy to return any data from a | |
4046 | * message as long as the data itself is valid, even if the | |
4047 | * overall message might be not. | |
4048 | * | |
4049 | * Note that the message signature is validated when | |
4050 | * parsing the headers, and that validation does check the | |
4051 | * 32/32 limit. | |
4052 | * | |
4053 | * Note that the specification defines no limits on the depth | |
4054 | * of stacked variants, but we do. | |
4055 | */ | |
4056 | if (m->n_containers >= BUS_CONTAINER_DEPTH) | |
4057 | return -EBADMSG; | |
4058 | ||
306f07be | 4059 | if (!GREEDY_REALLOC(m->containers, m->containers_allocated, m->n_containers + 1)) |
9a17484d | 4060 | return -ENOMEM; |
9a17484d | 4061 | |
7b058942 | 4062 | if (message_end_of_signature(m)) |
430fb8fa | 4063 | return -ENXIO; |
9a17484d | 4064 | |
1daf8121 LP |
4065 | if (message_end_of_array(m, m->rindex)) |
4066 | return 0; | |
4067 | ||
7b058942 LP |
4068 | c = message_get_container(m); |
4069 | ||
9a17484d LP |
4070 | signature = strdup(contents); |
4071 | if (!signature) | |
4072 | return -ENOMEM; | |
4073 | ||
b3af9646 LP |
4074 | c->saved_index = c->index; |
4075 | before = m->rindex; | |
4076 | ||
9a17484d | 4077 | if (type == SD_BUS_TYPE_ARRAY) |
6647dc66 | 4078 | r = bus_message_enter_array(m, c, contents, &array_size, &item_size, &offsets, &n_offsets); |
9a17484d | 4079 | else if (type == SD_BUS_TYPE_VARIANT) |
6647dc66 | 4080 | r = bus_message_enter_variant(m, c, contents, &item_size); |
9a17484d | 4081 | else if (type == SD_BUS_TYPE_STRUCT) |
6647dc66 | 4082 | r = bus_message_enter_struct(m, c, contents, &item_size, &offsets, &n_offsets); |
9a17484d | 4083 | else if (type == SD_BUS_TYPE_DICT_ENTRY) |
6647dc66 | 4084 | r = bus_message_enter_dict_entry(m, c, contents, &item_size, &offsets, &n_offsets); |
9a17484d LP |
4085 | else |
4086 | r = -EINVAL; | |
4087 | ||
4088 | if (r <= 0) { | |
4089 | free(signature); | |
6647dc66 | 4090 | free(offsets); |
9a17484d LP |
4091 | return r; |
4092 | } | |
4093 | ||
4094 | /* OK, let's fill it in */ | |
306f07be | 4095 | w = m->containers + m->n_containers++; |
9a17484d LP |
4096 | w->enclosing = type; |
4097 | w->signature = signature; | |
3798fd4c | 4098 | w->peeked_signature = NULL; |
9a17484d | 4099 | w->index = 0; |
6647dc66 | 4100 | |
b3af9646 | 4101 | w->before = before; |
9a17484d | 4102 | w->begin = m->rindex; |
e53d21d0 DH |
4103 | |
4104 | /* Unary type has fixed size of 1, but virtual size of 0 */ | |
4105 | if (BUS_MESSAGE_IS_GVARIANT(m) && | |
4106 | type == SD_BUS_TYPE_STRUCT && | |
4107 | isempty(signature)) | |
4108 | w->end = m->rindex + 0; | |
4109 | else | |
4110 | w->end = m->rindex + c->item_size; | |
6647dc66 LP |
4111 | |
4112 | w->array_size = array_size; | |
4113 | w->item_size = item_size; | |
4114 | w->offsets = offsets; | |
4115 | w->n_offsets = n_offsets; | |
4116 | w->offset_index = 0; | |
9a17484d LP |
4117 | |
4118 | return 1; | |
4119 | } | |
4120 | ||
d9f644e2 | 4121 | _public_ int sd_bus_message_exit_container(sd_bus_message *m) { |
9a17484d | 4122 | struct bus_container *c; |
5763192a | 4123 | unsigned saved; |
6647dc66 | 4124 | int r; |
9a17484d | 4125 | |
9d6c7c82 LP |
4126 | assert_return(m, -EINVAL); |
4127 | assert_return(m->sealed, -EPERM); | |
f959af20 | 4128 | assert_return(m->n_containers > 0, -ENXIO); |
9a17484d LP |
4129 | |
4130 | c = message_get_container(m); | |
6647dc66 LP |
4131 | |
4132 | if (c->enclosing != SD_BUS_TYPE_ARRAY) { | |
4133 | if (c->signature && c->signature[c->index] != 0) | |
4134 | return -EBUSY; | |
4135 | } | |
4136 | ||
4137 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
4138 | if (m->rindex < c->end) | |
4139 | return -EBUSY; | |
4140 | ||
4141 | } else if (c->enclosing == SD_BUS_TYPE_ARRAY) { | |
9a17484d LP |
4142 | uint32_t l; |
4143 | ||
4144 | l = BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
4145 | if (c->begin + l != m->rindex) | |
4146 | return -EBUSY; | |
9a17484d LP |
4147 | } |
4148 | ||
4149 | free(c->signature); | |
3798fd4c | 4150 | free(c->peeked_signature); |
6647dc66 | 4151 | free(c->offsets); |
9a17484d LP |
4152 | m->n_containers--; |
4153 | ||
6647dc66 LP |
4154 | c = message_get_container(m); |
4155 | ||
5763192a LP |
4156 | saved = c->index; |
4157 | c->index = c->saved_index; | |
6647dc66 | 4158 | r = container_next_item(m, c, &m->rindex); |
5763192a | 4159 | c->index = saved; |
6647dc66 LP |
4160 | if (r < 0) |
4161 | return r; | |
4162 | ||
9a17484d LP |
4163 | return 1; |
4164 | } | |
4165 | ||
b3af9646 LP |
4166 | static void message_quit_container(sd_bus_message *m) { |
4167 | struct bus_container *c; | |
4168 | ||
4169 | assert(m); | |
4170 | assert(m->sealed); | |
4171 | assert(m->n_containers > 0); | |
4172 | ||
4173 | c = message_get_container(m); | |
4174 | ||
4175 | /* Undo seeks */ | |
4176 | assert(m->rindex >= c->before); | |
4177 | m->rindex = c->before; | |
4178 | ||
4179 | /* Free container */ | |
4180 | free(c->signature); | |
6647dc66 | 4181 | free(c->offsets); |
b3af9646 LP |
4182 | m->n_containers--; |
4183 | ||
4184 | /* Correct index of new top-level container */ | |
4185 | c = message_get_container(m); | |
4186 | c->index = c->saved_index; | |
4187 | } | |
4188 | ||
d9f644e2 | 4189 | _public_ int sd_bus_message_peek_type(sd_bus_message *m, char *type, const char **contents) { |
9a17484d LP |
4190 | struct bus_container *c; |
4191 | int r; | |
4192 | ||
c430fee6 LP |
4193 | assert_return(m, -EINVAL); |
4194 | assert_return(m->sealed, -EPERM); | |
9a17484d | 4195 | |
7b058942 | 4196 | if (message_end_of_signature(m)) |
9a17484d LP |
4197 | goto eof; |
4198 | ||
4199 | if (message_end_of_array(m, m->rindex)) | |
4200 | goto eof; | |
4201 | ||
7b058942 LP |
4202 | c = message_get_container(m); |
4203 | ||
9a17484d LP |
4204 | if (bus_type_is_basic(c->signature[c->index])) { |
4205 | if (contents) | |
4206 | *contents = NULL; | |
4207 | if (type) | |
4208 | *type = c->signature[c->index]; | |
4209 | return 1; | |
4210 | } | |
4211 | ||
4212 | if (c->signature[c->index] == SD_BUS_TYPE_ARRAY) { | |
4213 | ||
4214 | if (contents) { | |
4215 | size_t l; | |
4216 | char *sig; | |
4217 | ||
4218 | r = signature_element_length(c->signature+c->index+1, &l); | |
4219 | if (r < 0) | |
4220 | return r; | |
4221 | ||
80a46c73 LP |
4222 | assert(l >= 1); |
4223 | ||
9a17484d LP |
4224 | sig = strndup(c->signature + c->index + 1, l); |
4225 | if (!sig) | |
4226 | return -ENOMEM; | |
4227 | ||
3798fd4c LP |
4228 | free(c->peeked_signature); |
4229 | *contents = c->peeked_signature = sig; | |
9a17484d LP |
4230 | } |
4231 | ||
4232 | if (type) | |
4233 | *type = SD_BUS_TYPE_ARRAY; | |
4234 | ||
4235 | return 1; | |
4236 | } | |
4237 | ||
4c701096 | 4238 | if (IN_SET(c->signature[c->index], SD_BUS_TYPE_STRUCT_BEGIN, SD_BUS_TYPE_DICT_ENTRY_BEGIN)) { |
9a17484d LP |
4239 | |
4240 | if (contents) { | |
4241 | size_t l; | |
4242 | char *sig; | |
4243 | ||
4244 | r = signature_element_length(c->signature+c->index, &l); | |
4245 | if (r < 0) | |
4246 | return r; | |
4247 | ||
4248 | assert(l >= 2); | |
4249 | sig = strndup(c->signature + c->index + 1, l - 2); | |
4250 | if (!sig) | |
4251 | return -ENOMEM; | |
4252 | ||
3798fd4c LP |
4253 | free(c->peeked_signature); |
4254 | *contents = c->peeked_signature = sig; | |
9a17484d LP |
4255 | } |
4256 | ||
4257 | if (type) | |
4258 | *type = c->signature[c->index] == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY; | |
4259 | ||
4260 | return 1; | |
4261 | } | |
4262 | ||
4263 | if (c->signature[c->index] == SD_BUS_TYPE_VARIANT) { | |
4264 | if (contents) { | |
9a17484d LP |
4265 | void *q; |
4266 | ||
6647dc66 LP |
4267 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
4268 | size_t k; | |
9a17484d | 4269 | |
6647dc66 LP |
4270 | if (c->item_size < 2) |
4271 | return -EBADMSG; | |
9a17484d | 4272 | |
6647dc66 LP |
4273 | /* Look for the NUL delimiter that |
4274 | separates the payload from the | |
4275 | signature. Since the body might be | |
4276 | in a different part that then the | |
4277 | signature we map byte by byte. */ | |
4278 | ||
4279 | for (k = 2; k <= c->item_size; k++) { | |
4280 | size_t where; | |
4281 | ||
4282 | where = m->rindex + c->item_size - k; | |
4283 | r = message_peek_body(m, &where, 1, k, &q); | |
4284 | if (r < 0) | |
4285 | return r; | |
6647dc66 LP |
4286 | |
4287 | if (*(char*) q == 0) | |
4288 | break; | |
4289 | } | |
4290 | ||
4291 | if (k > c->item_size) | |
4292 | return -EBADMSG; | |
4293 | ||
3798fd4c LP |
4294 | free(c->peeked_signature); |
4295 | c->peeked_signature = strndup((char*) q + 1, k - 1); | |
4296 | if (!c->peeked_signature) | |
6647dc66 LP |
4297 | return -ENOMEM; |
4298 | ||
3798fd4c | 4299 | if (!signature_is_valid(c->peeked_signature, true)) |
6647dc66 LP |
4300 | return -EBADMSG; |
4301 | ||
3798fd4c | 4302 | *contents = c->peeked_signature; |
6647dc66 LP |
4303 | } else { |
4304 | size_t rindex, l; | |
4305 | ||
4306 | rindex = m->rindex; | |
4307 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
4308 | if (r < 0) | |
4309 | return r; | |
9a17484d | 4310 | |
6647dc66 LP |
4311 | l = *(uint8_t*) q; |
4312 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
4313 | if (r < 0) | |
4314 | return r; | |
6647dc66 LP |
4315 | |
4316 | if (!validate_signature(q, l)) | |
4317 | return -EBADMSG; | |
4318 | ||
4319 | *contents = q; | |
4320 | } | |
9a17484d LP |
4321 | } |
4322 | ||
4323 | if (type) | |
4324 | *type = SD_BUS_TYPE_VARIANT; | |
4325 | ||
4326 | return 1; | |
4327 | } | |
4328 | ||
4329 | return -EINVAL; | |
4330 | ||
4331 | eof: | |
4332 | if (type) | |
7b058942 | 4333 | *type = 0; |
9a17484d LP |
4334 | if (contents) |
4335 | *contents = NULL; | |
4336 | return 0; | |
4337 | } | |
4338 | ||
d9f644e2 | 4339 | _public_ int sd_bus_message_rewind(sd_bus_message *m, int complete) { |
9a17484d LP |
4340 | struct bus_container *c; |
4341 | ||
9d6c7c82 LP |
4342 | assert_return(m, -EINVAL); |
4343 | assert_return(m->sealed, -EPERM); | |
9a17484d LP |
4344 | |
4345 | if (complete) { | |
bc7fd8cd | 4346 | message_reset_containers(m); |
9a17484d | 4347 | m->rindex = 0; |
9a17484d LP |
4348 | |
4349 | c = message_get_container(m); | |
4350 | } else { | |
4351 | c = message_get_container(m); | |
4352 | ||
6647dc66 | 4353 | c->offset_index = 0; |
9a17484d LP |
4354 | c->index = 0; |
4355 | m->rindex = c->begin; | |
4356 | } | |
4357 | ||
d36b7031 | 4358 | c->offset_index = 0; |
e4bb80a0 | 4359 | c->item_size = (c->n_offsets > 0 ? c->offsets[0] : c->end) - c->begin; |
d36b7031 | 4360 | |
9a17484d LP |
4361 | return !isempty(c->signature); |
4362 | } | |
718db961 | 4363 | |
1b492614 LP |
4364 | static int message_read_ap( |
4365 | sd_bus_message *m, | |
4366 | const char *types, | |
4367 | va_list ap) { | |
9a17484d | 4368 | |
fe1d424d LP |
4369 | unsigned n_array, n_struct; |
4370 | TypeStack stack[BUS_CONTAINER_DEPTH]; | |
4371 | unsigned stack_ptr = 0; | |
430fb8fa | 4372 | unsigned n_loop = 0; |
9a17484d LP |
4373 | int r; |
4374 | ||
4375 | assert(m); | |
1b492614 | 4376 | |
430fb8fa | 4377 | if (isempty(types)) |
1b492614 | 4378 | return 0; |
9a17484d | 4379 | |
fe1d424d LP |
4380 | /* Ideally, we'd just call ourselves recursively on every |
4381 | * complex type. However, the state of a va_list that is | |
4382 | * passed to a function is undefined after that function | |
4383 | * returns. This means we need to docode the va_list linearly | |
4384 | * in a single stackframe. We hence implement our own | |
4385 | * home-grown stack in an array. */ | |
4386 | ||
6f285378 | 4387 | n_array = (unsigned) -1; /* length of current array entries */ |
430fb8fa | 4388 | n_struct = strlen(types); /* length of current struct contents signature */ |
fe1d424d LP |
4389 | |
4390 | for (;;) { | |
4391 | const char *t; | |
4392 | ||
430fb8fa LP |
4393 | n_loop++; |
4394 | ||
1b492614 | 4395 | if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) { |
fe1d424d LP |
4396 | r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array); |
4397 | if (r < 0) | |
4398 | return r; | |
4399 | if (r == 0) | |
4400 | break; | |
4401 | ||
4402 | r = sd_bus_message_exit_container(m); | |
4403 | if (r < 0) | |
4404 | return r; | |
4405 | ||
4406 | continue; | |
4407 | } | |
4408 | ||
4409 | t = types; | |
4410 | if (n_array != (unsigned) -1) | |
313cefa1 | 4411 | n_array--; |
fe1d424d | 4412 | else { |
313cefa1 | 4413 | types++; |
fe1d424d LP |
4414 | n_struct--; |
4415 | } | |
4416 | ||
9a17484d LP |
4417 | switch (*t) { |
4418 | ||
4419 | case SD_BUS_TYPE_BYTE: | |
4420 | case SD_BUS_TYPE_BOOLEAN: | |
4421 | case SD_BUS_TYPE_INT16: | |
4422 | case SD_BUS_TYPE_UINT16: | |
4423 | case SD_BUS_TYPE_INT32: | |
4424 | case SD_BUS_TYPE_UINT32: | |
4425 | case SD_BUS_TYPE_INT64: | |
4426 | case SD_BUS_TYPE_UINT64: | |
4427 | case SD_BUS_TYPE_DOUBLE: | |
4428 | case SD_BUS_TYPE_STRING: | |
4429 | case SD_BUS_TYPE_OBJECT_PATH: | |
2c93b4ef LP |
4430 | case SD_BUS_TYPE_SIGNATURE: |
4431 | case SD_BUS_TYPE_UNIX_FD: { | |
9a17484d LP |
4432 | void *p; |
4433 | ||
4434 | p = va_arg(ap, void*); | |
4435 | r = sd_bus_message_read_basic(m, *t, p); | |
fe1d424d LP |
4436 | if (r < 0) |
4437 | return r; | |
430fb8fa LP |
4438 | if (r == 0) { |
4439 | if (n_loop <= 1) | |
4440 | return 0; | |
4441 | ||
fe1d424d | 4442 | return -ENXIO; |
430fb8fa | 4443 | } |
fe1d424d | 4444 | |
9a17484d LP |
4445 | break; |
4446 | } | |
4447 | ||
4448 | case SD_BUS_TYPE_ARRAY: { | |
4449 | size_t k; | |
4450 | ||
4451 | r = signature_element_length(t + 1, &k); | |
4452 | if (r < 0) | |
4453 | return r; | |
4454 | ||
4455 | { | |
9a17484d | 4456 | char s[k + 1]; |
9a17484d LP |
4457 | memcpy(s, t + 1, k); |
4458 | s[k] = 0; | |
9a17484d LP |
4459 | |
4460 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s); | |
4461 | if (r < 0) | |
4462 | return r; | |
430fb8fa LP |
4463 | if (r == 0) { |
4464 | if (n_loop <= 1) | |
4465 | return 0; | |
4466 | ||
9a17484d | 4467 | return -ENXIO; |
430fb8fa | 4468 | } |
fe1d424d | 4469 | } |
9a17484d | 4470 | |
fe1d424d LP |
4471 | if (n_array == (unsigned) -1) { |
4472 | types += k; | |
4473 | n_struct -= k; | |
9a17484d LP |
4474 | } |
4475 | ||
fe1d424d LP |
4476 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
4477 | if (r < 0) | |
4478 | return r; | |
4479 | ||
4480 | types = t + 1; | |
4481 | n_struct = k; | |
4482 | n_array = va_arg(ap, unsigned); | |
4483 | ||
9a17484d LP |
4484 | break; |
4485 | } | |
4486 | ||
4487 | case SD_BUS_TYPE_VARIANT: { | |
4488 | const char *s; | |
4489 | ||
4490 | s = va_arg(ap, const char *); | |
4491 | if (!s) | |
4492 | return -EINVAL; | |
4493 | ||
4494 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, s); | |
4495 | if (r < 0) | |
4496 | return r; | |
430fb8fa LP |
4497 | if (r == 0) { |
4498 | if (n_loop <= 1) | |
4499 | return 0; | |
4500 | ||
9a17484d | 4501 | return -ENXIO; |
430fb8fa | 4502 | } |
9a17484d | 4503 | |
fe1d424d | 4504 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
9a17484d LP |
4505 | if (r < 0) |
4506 | return r; | |
9a17484d | 4507 | |
fe1d424d LP |
4508 | types = s; |
4509 | n_struct = strlen(s); | |
4510 | n_array = (unsigned) -1; | |
4511 | ||
9a17484d LP |
4512 | break; |
4513 | } | |
4514 | ||
4515 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
4516 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
4517 | size_t k; | |
4518 | ||
4519 | r = signature_element_length(t, &k); | |
4520 | if (r < 0) | |
4521 | return r; | |
4522 | ||
4523 | { | |
4524 | char s[k - 1]; | |
4525 | memcpy(s, t + 1, k - 2); | |
4526 | s[k - 2] = 0; | |
4527 | ||
4528 | r = sd_bus_message_enter_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
4529 | if (r < 0) | |
4530 | return r; | |
430fb8fa LP |
4531 | if (r == 0) { |
4532 | if (n_loop <= 1) | |
4533 | return 0; | |
9a17484d | 4534 | return -ENXIO; |
430fb8fa | 4535 | } |
fe1d424d | 4536 | } |
9a17484d | 4537 | |
fe1d424d LP |
4538 | if (n_array == (unsigned) -1) { |
4539 | types += k - 1; | |
4540 | n_struct -= k - 1; | |
4541 | } | |
9a17484d | 4542 | |
fe1d424d LP |
4543 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
4544 | if (r < 0) | |
4545 | return r; | |
9a17484d | 4546 | |
fe1d424d LP |
4547 | types = t + 1; |
4548 | n_struct = k - 2; | |
4549 | n_array = (unsigned) -1; | |
9a17484d LP |
4550 | |
4551 | break; | |
4552 | } | |
4553 | ||
4554 | default: | |
fe1d424d | 4555 | return -EINVAL; |
9a17484d | 4556 | } |
9a17484d LP |
4557 | } |
4558 | ||
4559 | return 1; | |
4560 | } | |
4561 | ||
d9f644e2 | 4562 | _public_ int sd_bus_message_read(sd_bus_message *m, const char *types, ...) { |
9a17484d LP |
4563 | va_list ap; |
4564 | int r; | |
4565 | ||
9b07511d LP |
4566 | assert_return(m, -EINVAL); |
4567 | assert_return(m->sealed, -EPERM); | |
4568 | assert_return(types, -EINVAL); | |
9a17484d LP |
4569 | |
4570 | va_start(ap, types); | |
4571 | r = message_read_ap(m, types, ap); | |
4572 | va_end(ap); | |
4573 | ||
4574 | return r; | |
4575 | } | |
4576 | ||
d9f644e2 | 4577 | _public_ int sd_bus_message_skip(sd_bus_message *m, const char *types) { |
9b07511d LP |
4578 | int r; |
4579 | ||
4580 | assert_return(m, -EINVAL); | |
4581 | assert_return(m->sealed, -EPERM); | |
9b07511d | 4582 | |
d9fba533 LP |
4583 | /* If types is NULL, read exactly one element */ |
4584 | if (!types) { | |
4585 | struct bus_container *c; | |
4586 | size_t l; | |
4587 | ||
4588 | if (message_end_of_signature(m)) | |
4589 | return -ENXIO; | |
4590 | ||
4591 | if (message_end_of_array(m, m->rindex)) | |
4592 | return 0; | |
4593 | ||
4594 | c = message_get_container(m); | |
4595 | ||
4596 | r = signature_element_length(c->signature + c->index, &l); | |
4597 | if (r < 0) | |
4598 | return r; | |
4599 | ||
4600 | types = strndupa(c->signature + c->index, l); | |
4601 | } | |
9b07511d LP |
4602 | |
4603 | switch (*types) { | |
4604 | ||
d9fba533 LP |
4605 | case 0: /* Nothing to drop */ |
4606 | return 0; | |
4607 | ||
9b07511d LP |
4608 | case SD_BUS_TYPE_BYTE: |
4609 | case SD_BUS_TYPE_BOOLEAN: | |
4610 | case SD_BUS_TYPE_INT16: | |
4611 | case SD_BUS_TYPE_UINT16: | |
4612 | case SD_BUS_TYPE_INT32: | |
4613 | case SD_BUS_TYPE_UINT32: | |
4614 | case SD_BUS_TYPE_INT64: | |
4615 | case SD_BUS_TYPE_UINT64: | |
4616 | case SD_BUS_TYPE_DOUBLE: | |
4617 | case SD_BUS_TYPE_STRING: | |
4618 | case SD_BUS_TYPE_OBJECT_PATH: | |
4619 | case SD_BUS_TYPE_SIGNATURE: | |
4620 | case SD_BUS_TYPE_UNIX_FD: | |
4621 | ||
4622 | r = sd_bus_message_read_basic(m, *types, NULL); | |
4623 | if (r <= 0) | |
4624 | return r; | |
4625 | ||
4626 | r = sd_bus_message_skip(m, types + 1); | |
4627 | if (r < 0) | |
4628 | return r; | |
4629 | ||
4630 | return 1; | |
4631 | ||
4632 | case SD_BUS_TYPE_ARRAY: { | |
4633 | size_t k; | |
4634 | ||
4635 | r = signature_element_length(types + 1, &k); | |
4636 | if (r < 0) | |
4637 | return r; | |
4638 | ||
4639 | { | |
4640 | char s[k+1]; | |
4641 | memcpy(s, types+1, k); | |
4642 | s[k] = 0; | |
4643 | ||
4644 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s); | |
4645 | if (r <= 0) | |
4646 | return r; | |
4647 | ||
4648 | for (;;) { | |
4649 | r = sd_bus_message_skip(m, s); | |
4650 | if (r < 0) | |
4651 | return r; | |
4652 | if (r == 0) | |
4653 | break; | |
4654 | } | |
4655 | ||
4656 | r = sd_bus_message_exit_container(m); | |
4657 | if (r < 0) | |
4658 | return r; | |
4659 | } | |
4660 | ||
4661 | r = sd_bus_message_skip(m, types + 1 + k); | |
4662 | if (r < 0) | |
4663 | return r; | |
4664 | ||
4665 | return 1; | |
4666 | } | |
4667 | ||
4668 | case SD_BUS_TYPE_VARIANT: { | |
4669 | const char *contents; | |
4670 | char x; | |
4671 | ||
4672 | r = sd_bus_message_peek_type(m, &x, &contents); | |
4673 | if (r <= 0) | |
4674 | return r; | |
4675 | ||
4676 | if (x != SD_BUS_TYPE_VARIANT) | |
4677 | return -ENXIO; | |
4678 | ||
4679 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents); | |
4680 | if (r <= 0) | |
4681 | return r; | |
4682 | ||
4683 | r = sd_bus_message_skip(m, contents); | |
4684 | if (r < 0) | |
4685 | return r; | |
4686 | assert(r != 0); | |
4687 | ||
4688 | r = sd_bus_message_exit_container(m); | |
4689 | if (r < 0) | |
4690 | return r; | |
4691 | ||
4692 | r = sd_bus_message_skip(m, types + 1); | |
4693 | if (r < 0) | |
4694 | return r; | |
4695 | ||
4696 | return 1; | |
4697 | } | |
4698 | ||
4699 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
4700 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
4701 | size_t k; | |
4702 | ||
4703 | r = signature_element_length(types, &k); | |
4704 | if (r < 0) | |
4705 | return r; | |
4706 | ||
4707 | { | |
4708 | char s[k-1]; | |
4709 | memcpy(s, types+1, k-2); | |
4710 | s[k-2] = 0; | |
4711 | ||
4712 | r = sd_bus_message_enter_container(m, *types == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
4713 | if (r <= 0) | |
4714 | return r; | |
4715 | ||
4716 | r = sd_bus_message_skip(m, s); | |
4717 | if (r < 0) | |
4718 | return r; | |
9b07511d LP |
4719 | |
4720 | r = sd_bus_message_exit_container(m); | |
4721 | if (r < 0) | |
4722 | return r; | |
4723 | } | |
4724 | ||
4725 | r = sd_bus_message_skip(m, types + k); | |
4726 | if (r < 0) | |
4727 | return r; | |
4728 | ||
4729 | return 1; | |
4730 | } | |
4731 | ||
4732 | default: | |
4733 | return -EINVAL; | |
4734 | } | |
4735 | } | |
4736 | ||
2ac7c17f LP |
4737 | _public_ int sd_bus_message_read_array( |
4738 | sd_bus_message *m, | |
4739 | char type, | |
4740 | const void **ptr, | |
4741 | size_t *size) { | |
4742 | ||
b3af9646 LP |
4743 | struct bus_container *c; |
4744 | void *p; | |
4745 | size_t sz; | |
4746 | ssize_t align; | |
4747 | int r; | |
4748 | ||
9d6c7c82 LP |
4749 | assert_return(m, -EINVAL); |
4750 | assert_return(m->sealed, -EPERM); | |
4751 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
4752 | assert_return(ptr, -EINVAL); | |
4753 | assert_return(size, -EINVAL); | |
15411c0c | 4754 | assert_return(!BUS_MESSAGE_NEED_BSWAP(m), -EOPNOTSUPP); |
b3af9646 | 4755 | |
b3af9646 | 4756 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); |
66b26c5c | 4757 | if (r <= 0) |
b3af9646 LP |
4758 | return r; |
4759 | ||
4760 | c = message_get_container(m); | |
6647dc66 LP |
4761 | |
4762 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
4763 | align = bus_gvariant_get_alignment(CHAR_TO_STR(type)); | |
4764 | if (align < 0) | |
4765 | return align; | |
4766 | ||
18f5b48f | 4767 | sz = c->end - c->begin; |
6647dc66 LP |
4768 | } else { |
4769 | align = bus_type_get_alignment(type); | |
4770 | if (align < 0) | |
4771 | return align; | |
4772 | ||
4773 | sz = BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
4774 | } | |
b3af9646 | 4775 | |
5e86fd7b LP |
4776 | if (sz == 0) |
4777 | /* Zero length array, let's return some aligned | |
4778 | * pointer that is not NULL */ | |
4779 | p = (uint8_t*) NULL + align; | |
4780 | else { | |
4781 | r = message_peek_body(m, &m->rindex, align, sz, &p); | |
4782 | if (r < 0) | |
4783 | goto fail; | |
b3af9646 LP |
4784 | } |
4785 | ||
4786 | r = sd_bus_message_exit_container(m); | |
4787 | if (r < 0) | |
4788 | goto fail; | |
4789 | ||
4790 | *ptr = (const void*) p; | |
4791 | *size = sz; | |
4792 | ||
4793 | return 1; | |
4794 | ||
4795 | fail: | |
4796 | message_quit_container(m); | |
4797 | return r; | |
4798 | } | |
4799 | ||
80a46c73 LP |
4800 | static int message_peek_fields( |
4801 | sd_bus_message *m, | |
4802 | size_t *rindex, | |
4803 | size_t align, | |
4804 | size_t nbytes, | |
4805 | void **ret) { | |
4806 | ||
4807 | assert(m); | |
4808 | assert(rindex); | |
4809 | assert(align > 0); | |
4810 | ||
2ac7c17f | 4811 | return buffer_peek(BUS_MESSAGE_FIELDS(m), m->fields_size, rindex, align, nbytes, ret); |
80a46c73 LP |
4812 | } |
4813 | ||
9f26c90c LP |
4814 | static int message_peek_field_uint32( |
4815 | sd_bus_message *m, | |
4816 | size_t *ri, | |
6647dc66 | 4817 | size_t item_size, |
9f26c90c LP |
4818 | uint32_t *ret) { |
4819 | ||
4820 | int r; | |
4821 | void *q; | |
4822 | ||
4823 | assert(m); | |
4824 | assert(ri); | |
4825 | ||
6647dc66 LP |
4826 | if (BUS_MESSAGE_IS_GVARIANT(m) && item_size != 4) |
4827 | return -EBADMSG; | |
4828 | ||
4829 | /* identical for gvariant and dbus1 */ | |
4830 | ||
9f26c90c LP |
4831 | r = message_peek_fields(m, ri, 4, 4, &q); |
4832 | if (r < 0) | |
4833 | return r; | |
4834 | ||
4835 | if (ret) | |
4836 | *ret = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
4837 | ||
4838 | return 0; | |
4839 | } | |
4840 | ||
2ac7c17f LP |
4841 | static int message_peek_field_uint64( |
4842 | sd_bus_message *m, | |
4843 | size_t *ri, | |
4844 | size_t item_size, | |
4845 | uint64_t *ret) { | |
4846 | ||
4847 | int r; | |
4848 | void *q; | |
4849 | ||
4850 | assert(m); | |
4851 | assert(ri); | |
4852 | ||
4853 | if (BUS_MESSAGE_IS_GVARIANT(m) && item_size != 8) | |
4854 | return -EBADMSG; | |
4855 | ||
4856 | /* identical for gvariant and dbus1 */ | |
4857 | ||
4858 | r = message_peek_fields(m, ri, 8, 8, &q); | |
4859 | if (r < 0) | |
4860 | return r; | |
4861 | ||
4862 | if (ret) | |
4863 | *ret = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q); | |
4864 | ||
4865 | return 0; | |
4866 | } | |
4867 | ||
80a46c73 LP |
4868 | static int message_peek_field_string( |
4869 | sd_bus_message *m, | |
6693860f | 4870 | bool (*validate)(const char *p), |
80a46c73 | 4871 | size_t *ri, |
6647dc66 | 4872 | size_t item_size, |
80a46c73 LP |
4873 | const char **ret) { |
4874 | ||
9f26c90c | 4875 | uint32_t l; |
80a46c73 LP |
4876 | int r; |
4877 | void *q; | |
4878 | ||
9a17484d | 4879 | assert(m); |
80a46c73 LP |
4880 | assert(ri); |
4881 | ||
6647dc66 | 4882 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
80a46c73 | 4883 | |
6647dc66 LP |
4884 | if (item_size <= 0) |
4885 | return -EBADMSG; | |
4886 | ||
4887 | r = message_peek_fields(m, ri, 1, item_size, &q); | |
4888 | if (r < 0) | |
4889 | return r; | |
4890 | ||
4891 | l = item_size - 1; | |
4892 | } else { | |
4893 | r = message_peek_field_uint32(m, ri, 4, &l); | |
4894 | if (r < 0) | |
4895 | return r; | |
4896 | ||
4897 | r = message_peek_fields(m, ri, 1, l+1, &q); | |
4898 | if (r < 0) | |
4899 | return r; | |
4900 | } | |
9a17484d | 4901 | |
6693860f LP |
4902 | if (validate) { |
4903 | if (!validate_nul(q, l)) | |
4904 | return -EBADMSG; | |
4905 | ||
4906 | if (!validate(q)) | |
ac89bf1d LP |
4907 | return -EBADMSG; |
4908 | } else { | |
4909 | if (!validate_string(q, l)) | |
4910 | return -EBADMSG; | |
4911 | } | |
80a46c73 LP |
4912 | |
4913 | if (ret) | |
4914 | *ret = q; | |
4915 | ||
4916 | return 0; | |
4917 | } | |
4918 | ||
4919 | static int message_peek_field_signature( | |
4920 | sd_bus_message *m, | |
4921 | size_t *ri, | |
6647dc66 | 4922 | size_t item_size, |
80a46c73 LP |
4923 | const char **ret) { |
4924 | ||
4925 | size_t l; | |
4926 | int r; | |
4927 | void *q; | |
4928 | ||
4929 | assert(m); | |
4930 | assert(ri); | |
4931 | ||
6647dc66 | 4932 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
80a46c73 | 4933 | |
6647dc66 LP |
4934 | if (item_size <= 0) |
4935 | return -EBADMSG; | |
4936 | ||
4937 | r = message_peek_fields(m, ri, 1, item_size, &q); | |
4938 | if (r < 0) | |
4939 | return r; | |
4940 | ||
4941 | l = item_size - 1; | |
4942 | } else { | |
4943 | r = message_peek_fields(m, ri, 1, 1, &q); | |
4944 | if (r < 0) | |
4945 | return r; | |
4946 | ||
4947 | l = *(uint8_t*) q; | |
4948 | r = message_peek_fields(m, ri, 1, l+1, &q); | |
4949 | if (r < 0) | |
4950 | return r; | |
4951 | } | |
80a46c73 LP |
4952 | |
4953 | if (!validate_signature(q, l)) | |
4954 | return -EBADMSG; | |
4955 | ||
4956 | if (ret) | |
4957 | *ret = q; | |
4958 | ||
4959 | return 0; | |
4960 | } | |
4961 | ||
80a46c73 LP |
4962 | static int message_skip_fields( |
4963 | sd_bus_message *m, | |
4964 | size_t *ri, | |
4965 | uint32_t array_size, | |
4966 | const char **signature) { | |
4967 | ||
4968 | size_t original_index; | |
4969 | int r; | |
4970 | ||
4971 | assert(m); | |
4972 | assert(ri); | |
4973 | assert(signature); | |
6647dc66 | 4974 | assert(!BUS_MESSAGE_IS_GVARIANT(m)); |
80a46c73 LP |
4975 | |
4976 | original_index = *ri; | |
4977 | ||
4978 | for (;;) { | |
4979 | char t; | |
80a46c73 LP |
4980 | size_t l; |
4981 | ||
4982 | if (array_size != (uint32_t) -1 && | |
4983 | array_size <= *ri - original_index) | |
4984 | return 0; | |
4985 | ||
4986 | t = **signature; | |
4987 | if (!t) | |
4988 | return 0; | |
4989 | ||
6693860f LP |
4990 | if (t == SD_BUS_TYPE_STRING) { |
4991 | ||
6647dc66 | 4992 | r = message_peek_field_string(m, NULL, ri, 0, NULL); |
6693860f LP |
4993 | if (r < 0) |
4994 | return r; | |
4995 | ||
4996 | (*signature)++; | |
4997 | ||
4998 | } else if (t == SD_BUS_TYPE_OBJECT_PATH) { | |
80a46c73 | 4999 | |
6647dc66 | 5000 | r = message_peek_field_string(m, object_path_is_valid, ri, 0, NULL); |
80a46c73 LP |
5001 | if (r < 0) |
5002 | return r; | |
5003 | ||
5004 | (*signature)++; | |
5005 | ||
5006 | } else if (t == SD_BUS_TYPE_SIGNATURE) { | |
5007 | ||
6647dc66 | 5008 | r = message_peek_field_signature(m, ri, 0, NULL); |
80a46c73 LP |
5009 | if (r < 0) |
5010 | return r; | |
5011 | ||
5012 | (*signature)++; | |
5013 | ||
5014 | } else if (bus_type_is_basic(t)) { | |
27f6e5c7 | 5015 | ssize_t align, k; |
80a46c73 | 5016 | |
c66a2e0c TG |
5017 | align = bus_type_get_alignment(t); |
5018 | k = bus_type_get_size(t); | |
27f6e5c7 | 5019 | assert(align > 0 && k > 0); |
80a46c73 LP |
5020 | |
5021 | r = message_peek_fields(m, ri, align, k, NULL); | |
5022 | if (r < 0) | |
5023 | return r; | |
9a17484d | 5024 | |
80a46c73 LP |
5025 | (*signature)++; |
5026 | ||
5027 | } else if (t == SD_BUS_TYPE_ARRAY) { | |
5028 | ||
5029 | r = signature_element_length(*signature+1, &l); | |
5030 | if (r < 0) | |
5031 | return r; | |
5032 | ||
5033 | assert(l >= 1); | |
5034 | { | |
5035 | char sig[l-1], *s; | |
9f26c90c | 5036 | uint32_t nas; |
80a46c73 LP |
5037 | int alignment; |
5038 | ||
5039 | strncpy(sig, *signature + 1, l-1); | |
5040 | s = sig; | |
5041 | ||
5042 | alignment = bus_type_get_alignment(sig[0]); | |
5043 | if (alignment < 0) | |
5044 | return alignment; | |
5045 | ||
6647dc66 | 5046 | r = message_peek_field_uint32(m, ri, 0, &nas); |
80a46c73 LP |
5047 | if (r < 0) |
5048 | return r; | |
ac89bf1d | 5049 | if (nas > BUS_ARRAY_MAX_SIZE) |
80a46c73 LP |
5050 | return -EBADMSG; |
5051 | ||
5052 | r = message_peek_fields(m, ri, alignment, 0, NULL); | |
5053 | if (r < 0) | |
5054 | return r; | |
5055 | ||
5056 | r = message_skip_fields(m, ri, nas, (const char**) &s); | |
5057 | if (r < 0) | |
5058 | return r; | |
5059 | } | |
5060 | ||
5061 | (*signature) += 1 + l; | |
5062 | ||
5063 | } else if (t == SD_BUS_TYPE_VARIANT) { | |
5064 | const char *s; | |
5065 | ||
6647dc66 | 5066 | r = message_peek_field_signature(m, ri, 0, &s); |
80a46c73 LP |
5067 | if (r < 0) |
5068 | return r; | |
5069 | ||
5070 | r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s); | |
5071 | if (r < 0) | |
5072 | return r; | |
5073 | ||
5074 | (*signature)++; | |
5075 | ||
945c2931 | 5076 | } else if (IN_SET(t, SD_BUS_TYPE_STRUCT, SD_BUS_TYPE_DICT_ENTRY)) { |
80a46c73 LP |
5077 | |
5078 | r = signature_element_length(*signature, &l); | |
5079 | if (r < 0) | |
5080 | return r; | |
5081 | ||
5082 | assert(l >= 2); | |
5083 | { | |
5084 | char sig[l-1], *s; | |
5085 | strncpy(sig, *signature + 1, l-1); | |
5086 | s = sig; | |
5087 | ||
5088 | r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s); | |
5089 | if (r < 0) | |
5090 | return r; | |
5091 | } | |
5092 | ||
5093 | *signature += l; | |
5094 | } else | |
5095 | return -EINVAL; | |
5096 | } | |
5097 | } | |
5098 | ||
6629161f | 5099 | int bus_message_parse_fields(sd_bus_message *m) { |
80a46c73 LP |
5100 | size_t ri; |
5101 | int r; | |
2c93b4ef | 5102 | uint32_t unix_fds = 0; |
5a4d665a | 5103 | bool unix_fds_set = false; |
6647dc66 LP |
5104 | void *offsets = NULL; |
5105 | unsigned n_offsets = 0; | |
8f2e44f8 | 5106 | size_t sz = 0; |
6647dc66 | 5107 | unsigned i = 0; |
80a46c73 LP |
5108 | |
5109 | assert(m); | |
5110 | ||
6647dc66 | 5111 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f LP |
5112 | char *p; |
5113 | ||
5114 | /* Read the signature from the end of the body variant first */ | |
5115 | sz = bus_gvariant_determine_word_size(BUS_MESSAGE_SIZE(m), 0); | |
5116 | if (m->footer_accessible < 1 + sz) | |
5117 | return -EBADMSG; | |
5118 | ||
5119 | p = (char*) m->footer + m->footer_accessible - (1 + sz); | |
5120 | for (;;) { | |
5121 | if (p < (char*) m->footer) | |
5122 | return -EBADMSG; | |
5123 | ||
5124 | if (*p == 0) { | |
03ebf5e8 | 5125 | size_t l; |
2ac7c17f LP |
5126 | char *c; |
5127 | ||
03ebf5e8 DH |
5128 | /* We found the beginning of the signature |
5129 | * string, yay! We require the body to be a | |
5130 | * structure, so verify it and then strip the | |
5131 | * opening/closing brackets. */ | |
2ac7c17f | 5132 | |
03ebf5e8 DH |
5133 | l = ((char*) m->footer + m->footer_accessible) - p - (1 + sz); |
5134 | if (l < 2 || | |
5135 | p[1] != SD_BUS_TYPE_STRUCT_BEGIN || | |
5136 | p[1 + l - 1] != SD_BUS_TYPE_STRUCT_END) | |
5137 | return -EBADMSG; | |
5138 | ||
5139 | c = strndup(p + 1 + 1, l - 2); | |
2ac7c17f LP |
5140 | if (!c) |
5141 | return -ENOMEM; | |
5142 | ||
5143 | free(m->root_container.signature); | |
5144 | m->root_container.signature = c; | |
5145 | break; | |
5146 | } | |
6647dc66 | 5147 | |
2ac7c17f LP |
5148 | p--; |
5149 | } | |
5150 | ||
5151 | /* Calculate the actual user body size, by removing | |
5152 | * the trailing variant signature and struct offset | |
5153 | * table */ | |
5154 | m->user_body_size = m->body_size - ((char*) m->footer + m->footer_accessible - p); | |
5155 | ||
5156 | /* Pull out the offset table for the fields array */ | |
5157 | sz = bus_gvariant_determine_word_size(m->fields_size, 0); | |
6647dc66 LP |
5158 | if (sz > 0) { |
5159 | size_t framing; | |
2ac7c17f | 5160 | void *q; |
6647dc66 | 5161 | |
2ac7c17f | 5162 | ri = m->fields_size - sz; |
6647dc66 LP |
5163 | r = message_peek_fields(m, &ri, 1, sz, &q); |
5164 | if (r < 0) | |
5165 | return r; | |
5166 | ||
2ac7c17f LP |
5167 | framing = bus_gvariant_read_word_le(q, sz); |
5168 | if (framing >= m->fields_size - sz) | |
6647dc66 | 5169 | return -EBADMSG; |
2ac7c17f | 5170 | if ((m->fields_size - framing) % sz != 0) |
6647dc66 LP |
5171 | return -EBADMSG; |
5172 | ||
5173 | ri = framing; | |
2ac7c17f | 5174 | r = message_peek_fields(m, &ri, 1, m->fields_size - framing, &offsets); |
6647dc66 LP |
5175 | if (r < 0) |
5176 | return r; | |
5177 | ||
2ac7c17f | 5178 | n_offsets = (m->fields_size - framing) / sz; |
6647dc66 | 5179 | } |
2ac7c17f LP |
5180 | } else |
5181 | m->user_body_size = m->body_size; | |
6647dc66 LP |
5182 | |
5183 | ri = 0; | |
2ac7c17f | 5184 | while (ri < m->fields_size) { |
6647dc66 | 5185 | _cleanup_free_ char *sig = NULL; |
80a46c73 | 5186 | const char *signature; |
2ac7c17f | 5187 | uint64_t field_type; |
6647dc66 LP |
5188 | size_t item_size = (size_t) -1; |
5189 | ||
5190 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
2ac7c17f LP |
5191 | uint64_t *u64; |
5192 | ||
6647dc66 LP |
5193 | if (i >= n_offsets) |
5194 | break; | |
5195 | ||
5196 | if (i == 0) | |
5197 | ri = 0; | |
5198 | else | |
2ac7c17f | 5199 | ri = ALIGN_TO(bus_gvariant_read_word_le((uint8_t*) offsets + (i-1)*sz, sz), 8); |
80a46c73 | 5200 | |
2ac7c17f LP |
5201 | r = message_peek_fields(m, &ri, 8, 8, (void**) &u64); |
5202 | if (r < 0) | |
5203 | return r; | |
5204 | ||
5205 | field_type = BUS_MESSAGE_BSWAP64(m, *u64); | |
5206 | } else { | |
5207 | uint8_t *u8; | |
5208 | ||
5209 | r = message_peek_fields(m, &ri, 8, 1, (void**) &u8); | |
5210 | if (r < 0) | |
5211 | return r; | |
5212 | ||
5213 | field_type = *u8; | |
5214 | } | |
954871d8 | 5215 | |
6647dc66 LP |
5216 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
5217 | size_t where, end; | |
5218 | char *b; | |
5219 | void *q; | |
5220 | ||
2ac7c17f | 5221 | end = bus_gvariant_read_word_le((uint8_t*) offsets + i*sz, sz); |
6647dc66 LP |
5222 | |
5223 | if (end < ri) | |
5224 | return -EBADMSG; | |
5225 | ||
5226 | where = ri = ALIGN_TO(ri, 8); | |
5227 | item_size = end - ri; | |
5228 | r = message_peek_fields(m, &where, 1, item_size, &q); | |
5229 | if (r < 0) | |
5230 | return r; | |
5231 | ||
5232 | b = memrchr(q, 0, item_size); | |
5233 | if (!b) | |
5234 | return -EBADMSG; | |
5235 | ||
5236 | sig = strndup(b+1, item_size - (b+1-(char*) q)); | |
5237 | if (!sig) | |
5238 | return -ENOMEM; | |
5239 | ||
5240 | signature = sig; | |
5241 | item_size = b - (char*) q; | |
5242 | } else { | |
5243 | r = message_peek_field_signature(m, &ri, 0, &signature); | |
5244 | if (r < 0) | |
5245 | return r; | |
5246 | } | |
80a46c73 | 5247 | |
2ac7c17f LP |
5248 | switch (field_type) { |
5249 | ||
0461f8cd | 5250 | case _BUS_MESSAGE_HEADER_INVALID: |
80a46c73 LP |
5251 | return -EBADMSG; |
5252 | ||
0461f8cd | 5253 | case BUS_MESSAGE_HEADER_PATH: |
2c93b4ef LP |
5254 | |
5255 | if (m->path) | |
5256 | return -EBADMSG; | |
5257 | ||
80a46c73 LP |
5258 | if (!streq(signature, "o")) |
5259 | return -EBADMSG; | |
5260 | ||
6647dc66 | 5261 | r = message_peek_field_string(m, object_path_is_valid, &ri, item_size, &m->path); |
80a46c73 LP |
5262 | break; |
5263 | ||
0461f8cd | 5264 | case BUS_MESSAGE_HEADER_INTERFACE: |
2c93b4ef LP |
5265 | |
5266 | if (m->interface) | |
5267 | return -EBADMSG; | |
5268 | ||
80a46c73 LP |
5269 | if (!streq(signature, "s")) |
5270 | return -EBADMSG; | |
5271 | ||
6647dc66 | 5272 | r = message_peek_field_string(m, interface_name_is_valid, &ri, item_size, &m->interface); |
80a46c73 LP |
5273 | break; |
5274 | ||
0461f8cd | 5275 | case BUS_MESSAGE_HEADER_MEMBER: |
2c93b4ef LP |
5276 | |
5277 | if (m->member) | |
5278 | return -EBADMSG; | |
5279 | ||
80a46c73 LP |
5280 | if (!streq(signature, "s")) |
5281 | return -EBADMSG; | |
5282 | ||
6647dc66 | 5283 | r = message_peek_field_string(m, member_name_is_valid, &ri, item_size, &m->member); |
80a46c73 LP |
5284 | break; |
5285 | ||
0461f8cd | 5286 | case BUS_MESSAGE_HEADER_ERROR_NAME: |
2c93b4ef LP |
5287 | |
5288 | if (m->error.name) | |
5289 | return -EBADMSG; | |
5290 | ||
80a46c73 LP |
5291 | if (!streq(signature, "s")) |
5292 | return -EBADMSG; | |
5293 | ||
6647dc66 | 5294 | r = message_peek_field_string(m, error_name_is_valid, &ri, item_size, &m->error.name); |
79f8d3d2 LP |
5295 | if (r >= 0) |
5296 | m->error._need_free = -1; | |
5297 | ||
80a46c73 LP |
5298 | break; |
5299 | ||
0461f8cd | 5300 | case BUS_MESSAGE_HEADER_DESTINATION: |
2c93b4ef LP |
5301 | |
5302 | if (m->destination) | |
5303 | return -EBADMSG; | |
5304 | ||
80a46c73 LP |
5305 | if (!streq(signature, "s")) |
5306 | return -EBADMSG; | |
5307 | ||
6647dc66 | 5308 | r = message_peek_field_string(m, service_name_is_valid, &ri, item_size, &m->destination); |
80a46c73 LP |
5309 | break; |
5310 | ||
0461f8cd | 5311 | case BUS_MESSAGE_HEADER_SENDER: |
2c93b4ef LP |
5312 | |
5313 | if (m->sender) | |
5314 | return -EBADMSG; | |
5315 | ||
80a46c73 LP |
5316 | if (!streq(signature, "s")) |
5317 | return -EBADMSG; | |
5318 | ||
6647dc66 | 5319 | r = message_peek_field_string(m, service_name_is_valid, &ri, item_size, &m->sender); |
49b832c5 | 5320 | |
a132bef0 | 5321 | if (r >= 0 && m->sender[0] == ':' && m->bus->bus_client) { |
49b832c5 LP |
5322 | m->creds.unique_name = (char*) m->sender; |
5323 | m->creds.mask |= SD_BUS_CREDS_UNIQUE_NAME & m->bus->creds_mask; | |
5324 | } | |
5325 | ||
80a46c73 LP |
5326 | break; |
5327 | ||
5328 | ||
0461f8cd | 5329 | case BUS_MESSAGE_HEADER_SIGNATURE: { |
80a46c73 LP |
5330 | const char *s; |
5331 | char *c; | |
5332 | ||
2ac7c17f LP |
5333 | if (BUS_MESSAGE_IS_GVARIANT(m)) /* only applies to dbus1 */ |
5334 | return -EBADMSG; | |
5335 | ||
2c93b4ef LP |
5336 | if (m->root_container.signature) |
5337 | return -EBADMSG; | |
5338 | ||
80a46c73 LP |
5339 | if (!streq(signature, "g")) |
5340 | return -EBADMSG; | |
5341 | ||
6647dc66 | 5342 | r = message_peek_field_signature(m, &ri, item_size, &s); |
80a46c73 LP |
5343 | if (r < 0) |
5344 | return r; | |
5345 | ||
5346 | c = strdup(s); | |
5347 | if (!c) | |
5348 | return -ENOMEM; | |
5349 | ||
5350 | free(m->root_container.signature); | |
5351 | m->root_container.signature = c; | |
80a46c73 LP |
5352 | break; |
5353 | } | |
5354 | ||
2ac7c17f | 5355 | case BUS_MESSAGE_HEADER_REPLY_SERIAL: |
42c4ebcb | 5356 | |
693eb9a2 | 5357 | if (m->reply_cookie != 0) |
2c93b4ef LP |
5358 | return -EBADMSG; |
5359 | ||
2ac7c17f LP |
5360 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
5361 | /* 64bit on dbus2 */ | |
6693860f | 5362 | |
2ac7c17f LP |
5363 | if (!streq(signature, "t")) |
5364 | return -EBADMSG; | |
5365 | ||
5366 | r = message_peek_field_uint64(m, &ri, item_size, &m->reply_cookie); | |
5367 | if (r < 0) | |
5368 | return r; | |
5369 | } else { | |
5370 | /* 32bit on dbus1 */ | |
5371 | uint32_t serial; | |
5372 | ||
5373 | if (!streq(signature, "u")) | |
5374 | return -EBADMSG; | |
b381de41 | 5375 | |
2ac7c17f LP |
5376 | r = message_peek_field_uint32(m, &ri, item_size, &serial); |
5377 | if (r < 0) | |
5378 | return r; | |
5379 | ||
5380 | m->reply_cookie = serial; | |
5381 | } | |
42c4ebcb | 5382 | |
693eb9a2 | 5383 | if (m->reply_cookie == 0) |
6693860f LP |
5384 | return -EBADMSG; |
5385 | ||
80a46c73 LP |
5386 | break; |
5387 | ||
0461f8cd | 5388 | case BUS_MESSAGE_HEADER_UNIX_FDS: |
5a4d665a | 5389 | if (unix_fds_set) |
2c93b4ef LP |
5390 | return -EBADMSG; |
5391 | ||
5392 | if (!streq(signature, "u")) | |
5393 | return -EBADMSG; | |
5394 | ||
6647dc66 | 5395 | r = message_peek_field_uint32(m, &ri, item_size, &unix_fds); |
2c93b4ef LP |
5396 | if (r < 0) |
5397 | return -EBADMSG; | |
5398 | ||
5a4d665a | 5399 | unix_fds_set = true; |
2c93b4ef LP |
5400 | break; |
5401 | ||
80a46c73 | 5402 | default: |
6647dc66 LP |
5403 | if (!BUS_MESSAGE_IS_GVARIANT(m)) |
5404 | r = message_skip_fields(m, &ri, (uint32_t) -1, (const char **) &signature); | |
80a46c73 LP |
5405 | } |
5406 | ||
5407 | if (r < 0) | |
5408 | return r; | |
6647dc66 LP |
5409 | |
5410 | i++; | |
80a46c73 LP |
5411 | } |
5412 | ||
2c93b4ef LP |
5413 | if (m->n_fds != unix_fds) |
5414 | return -EBADMSG; | |
5415 | ||
80a46c73 LP |
5416 | switch (m->header->type) { |
5417 | ||
40ca29a1 | 5418 | case SD_BUS_MESSAGE_SIGNAL: |
80a46c73 LP |
5419 | if (!m->path || !m->interface || !m->member) |
5420 | return -EBADMSG; | |
7fa934b0 LP |
5421 | |
5422 | if (m->reply_cookie != 0) | |
5423 | return -EBADMSG; | |
5424 | ||
80a46c73 LP |
5425 | break; |
5426 | ||
40ca29a1 | 5427 | case SD_BUS_MESSAGE_METHOD_CALL: |
80a46c73 LP |
5428 | |
5429 | if (!m->path || !m->member) | |
5430 | return -EBADMSG; | |
5431 | ||
7fa934b0 LP |
5432 | if (m->reply_cookie != 0) |
5433 | return -EBADMSG; | |
5434 | ||
80a46c73 LP |
5435 | break; |
5436 | ||
40ca29a1 | 5437 | case SD_BUS_MESSAGE_METHOD_RETURN: |
80a46c73 | 5438 | |
693eb9a2 | 5439 | if (m->reply_cookie == 0) |
80a46c73 LP |
5440 | return -EBADMSG; |
5441 | break; | |
5442 | ||
40ca29a1 | 5443 | case SD_BUS_MESSAGE_METHOD_ERROR: |
80a46c73 | 5444 | |
693eb9a2 | 5445 | if (m->reply_cookie == 0 || !m->error.name) |
80a46c73 LP |
5446 | return -EBADMSG; |
5447 | break; | |
5448 | } | |
9a17484d | 5449 | |
35473296 LP |
5450 | /* Refuse non-local messages that claim they are local */ |
5451 | if (streq_ptr(m->path, "/org/freedesktop/DBus/Local")) | |
5452 | return -EBADMSG; | |
5453 | if (streq_ptr(m->interface, "org.freedesktop.DBus.Local")) | |
5454 | return -EBADMSG; | |
5455 | if (streq_ptr(m->sender, "org.freedesktop.DBus.Local")) | |
5456 | return -EBADMSG; | |
5457 | ||
2ac7c17f | 5458 | m->root_container.end = m->user_body_size; |
6647dc66 LP |
5459 | |
5460 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
5461 | r = build_struct_offsets( | |
5462 | m, | |
5463 | m->root_container.signature, | |
2ac7c17f | 5464 | m->user_body_size, |
6647dc66 LP |
5465 | &m->root_container.item_size, |
5466 | &m->root_container.offsets, | |
5467 | &m->root_container.n_offsets); | |
5468 | if (r < 0) | |
5469 | return r; | |
5470 | } | |
5471 | ||
89ffcd2a | 5472 | /* Try to read the error message, but if we can't it's a non-issue */ |
40ca29a1 | 5473 | if (m->header->type == SD_BUS_MESSAGE_METHOD_ERROR) |
d3839740 | 5474 | (void) sd_bus_message_read(m, "s", &m->error.message); |
89ffcd2a | 5475 | |
9a17484d LP |
5476 | return 0; |
5477 | } | |
5478 | ||
d9f644e2 | 5479 | _public_ int sd_bus_message_set_destination(sd_bus_message *m, const char *destination) { |
9d6c7c82 LP |
5480 | assert_return(m, -EINVAL); |
5481 | assert_return(destination, -EINVAL); | |
5482 | assert_return(!m->sealed, -EPERM); | |
5483 | assert_return(!m->destination, -EEXIST); | |
9a17484d | 5484 | |
0461f8cd | 5485 | return message_append_field_string(m, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &m->destination); |
9a17484d LP |
5486 | } |
5487 | ||
de1c301e LP |
5488 | int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz) { |
5489 | size_t total; | |
de1c301e | 5490 | void *p, *e; |
bc7fd8cd LP |
5491 | unsigned i; |
5492 | struct bus_body_part *part; | |
de1c301e LP |
5493 | |
5494 | assert(m); | |
5495 | assert(buffer); | |
5496 | assert(sz); | |
5497 | ||
6629161f | 5498 | total = BUS_MESSAGE_SIZE(m); |
de1c301e LP |
5499 | |
5500 | p = malloc(total); | |
5501 | if (!p) | |
5502 | return -ENOMEM; | |
5503 | ||
c91cb83c | 5504 | e = mempcpy(p, m->header, BUS_MESSAGE_BODY_BEGIN(m)); |
9b29bb68 | 5505 | MESSAGE_FOREACH_PART(part, i, m) |
bc7fd8cd | 5506 | e = mempcpy(e, part->data, part->size); |
2100fa10 LP |
5507 | |
5508 | assert(total == (size_t) ((uint8_t*) e - (uint8_t*) p)); | |
de1c301e LP |
5509 | |
5510 | *buffer = p; | |
5511 | *sz = total; | |
5512 | ||
5513 | return 0; | |
5514 | } | |
89ffcd2a LP |
5515 | |
5516 | int bus_message_read_strv_extend(sd_bus_message *m, char ***l) { | |
43ef7603 | 5517 | const char *s; |
89ffcd2a LP |
5518 | int r; |
5519 | ||
5520 | assert(m); | |
5521 | assert(l); | |
5522 | ||
5523 | r = sd_bus_message_enter_container(m, 'a', "s"); | |
4686d1b6 | 5524 | if (r <= 0) |
89ffcd2a LP |
5525 | return r; |
5526 | ||
43ef7603 | 5527 | while ((r = sd_bus_message_read_basic(m, 's', &s)) > 0) { |
89ffcd2a LP |
5528 | r = strv_extend(l, s); |
5529 | if (r < 0) | |
5530 | return r; | |
5531 | } | |
43ef7603 DH |
5532 | if (r < 0) |
5533 | return r; | |
89ffcd2a LP |
5534 | |
5535 | r = sd_bus_message_exit_container(m); | |
5536 | if (r < 0) | |
5537 | return r; | |
5538 | ||
405cd3aa | 5539 | return 1; |
89ffcd2a | 5540 | } |
392d5b37 | 5541 | |
ba341e7c | 5542 | _public_ int sd_bus_message_read_strv(sd_bus_message *m, char ***l) { |
4686d1b6 MAP |
5543 | char **strv = NULL; |
5544 | int r; | |
5545 | ||
5546 | assert_return(m, -EINVAL); | |
5547 | assert_return(m->sealed, -EPERM); | |
5548 | assert_return(l, -EINVAL); | |
5549 | ||
5550 | r = bus_message_read_strv_extend(m, &strv); | |
5551 | if (r <= 0) { | |
5552 | strv_free(strv); | |
5553 | return r; | |
5554 | } | |
5555 | ||
5556 | *l = strv; | |
5557 | return 1; | |
5558 | } | |
5559 | ||
eccd47c5 LP |
5560 | static int bus_message_get_arg_skip( |
5561 | sd_bus_message *m, | |
5562 | unsigned i, | |
5563 | char *_type, | |
5564 | const char **_contents) { | |
5565 | ||
42c5aaf3 | 5566 | unsigned j; |
198b158f | 5567 | int r; |
392d5b37 | 5568 | |
392d5b37 LP |
5569 | r = sd_bus_message_rewind(m, true); |
5570 | if (r < 0) | |
198b158f | 5571 | return r; |
392d5b37 | 5572 | |
198b158f | 5573 | for (j = 0;; j++) { |
eccd47c5 LP |
5574 | const char *contents; |
5575 | char type; | |
5576 | ||
198b158f LP |
5577 | r = sd_bus_message_peek_type(m, &type, &contents); |
5578 | if (r < 0) | |
5579 | return r; | |
5580 | if (r == 0) | |
5581 | return -ENXIO; | |
5582 | ||
5583 | /* Don't match against arguments after the first one we don't understand */ | |
5584 | if (!IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE) && | |
5585 | !(type == SD_BUS_TYPE_ARRAY && STR_IN_SET(contents, "s", "o", "g"))) | |
5586 | return -ENXIO; | |
42c5aaf3 | 5587 | |
eccd47c5 LP |
5588 | if (j >= i) { |
5589 | if (_contents) | |
5590 | *_contents = contents; | |
5591 | if (_type) | |
5592 | *_type = type; | |
5593 | return 0; | |
5594 | } | |
198b158f LP |
5595 | |
5596 | r = sd_bus_message_skip(m, NULL); | |
392d5b37 | 5597 | if (r < 0) |
198b158f LP |
5598 | return r; |
5599 | } | |
392d5b37 | 5600 | |
eccd47c5 | 5601 | } |
392d5b37 | 5602 | |
eccd47c5 LP |
5603 | int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str) { |
5604 | char type; | |
5605 | int r; | |
198b158f | 5606 | |
eccd47c5 LP |
5607 | assert(m); |
5608 | assert(str); | |
198b158f | 5609 | |
eccd47c5 LP |
5610 | r = bus_message_get_arg_skip(m, i, &type, NULL); |
5611 | if (r < 0) | |
5612 | return r; | |
198b158f | 5613 | |
eccd47c5 LP |
5614 | if (!IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE)) |
5615 | return -ENXIO; | |
392d5b37 | 5616 | |
eccd47c5 LP |
5617 | return sd_bus_message_read_basic(m, type, str); |
5618 | } | |
5619 | ||
5620 | int bus_message_get_arg_strv(sd_bus_message *m, unsigned i, char ***strv) { | |
5621 | const char *contents; | |
5622 | char type; | |
5623 | int r; | |
5624 | ||
5625 | assert(m); | |
5626 | assert(strv); | |
5627 | ||
5628 | r = bus_message_get_arg_skip(m, i, &type, &contents); | |
5629 | if (r < 0) | |
5630 | return r; | |
5631 | ||
5632 | if (type != SD_BUS_TYPE_ARRAY) | |
5633 | return -ENXIO; | |
5634 | if (!STR_IN_SET(contents, "s", "o", "g")) | |
5635 | return -ENXIO; | |
5636 | ||
5637 | return sd_bus_message_read_strv(m, strv); | |
392d5b37 | 5638 | } |
2100fa10 | 5639 | |
d9f644e2 | 5640 | _public_ int sd_bus_message_get_errno(sd_bus_message *m) { |
b49ffb29 | 5641 | assert_return(m, EINVAL); |
eb01ba5d | 5642 | |
40ca29a1 | 5643 | if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) |
eb01ba5d LP |
5644 | return 0; |
5645 | ||
40ca29a1 | 5646 | return sd_bus_error_get_errno(&m->error); |
eb01ba5d | 5647 | } |
29ddb38f | 5648 | |
d9f644e2 | 5649 | _public_ const char* sd_bus_message_get_signature(sd_bus_message *m, int complete) { |
29ddb38f LP |
5650 | struct bus_container *c; |
5651 | ||
9d6c7c82 | 5652 | assert_return(m, NULL); |
29ddb38f LP |
5653 | |
5654 | c = complete ? &m->root_container : message_get_container(m); | |
d6385068 | 5655 | return strempty(c->signature); |
29ddb38f | 5656 | } |
c430fee6 | 5657 | |
8022212b LP |
5658 | _public_ int sd_bus_message_is_empty(sd_bus_message *m) { |
5659 | assert_return(m, -EINVAL); | |
5660 | ||
5661 | return isempty(m->root_container.signature); | |
5662 | } | |
5663 | ||
64e96a19 LP |
5664 | _public_ int sd_bus_message_has_signature(sd_bus_message *m, const char *signature) { |
5665 | assert_return(m, -EINVAL); | |
5666 | ||
5667 | return streq(strempty(m->root_container.signature), strempty(signature)); | |
5668 | } | |
5669 | ||
d9f644e2 | 5670 | _public_ int sd_bus_message_copy(sd_bus_message *m, sd_bus_message *source, int all) { |
c430fee6 LP |
5671 | bool done_something = false; |
5672 | int r; | |
5673 | ||
80ba3b84 LP |
5674 | assert_return(m, -EINVAL); |
5675 | assert_return(source, -EINVAL); | |
5676 | assert_return(!m->sealed, -EPERM); | |
5677 | assert_return(source->sealed, -EPERM); | |
5678 | ||
c430fee6 LP |
5679 | do { |
5680 | const char *contents; | |
5681 | char type; | |
5682 | union { | |
5683 | uint8_t u8; | |
5684 | uint16_t u16; | |
5685 | int16_t s16; | |
5686 | uint32_t u32; | |
5687 | int32_t s32; | |
5688 | uint64_t u64; | |
5689 | int64_t s64; | |
5690 | double d64; | |
5691 | const char *string; | |
5692 | int i; | |
5693 | } basic; | |
5694 | ||
5695 | r = sd_bus_message_peek_type(source, &type, &contents); | |
5696 | if (r < 0) | |
5697 | return r; | |
5698 | if (r == 0) | |
5699 | break; | |
5700 | ||
5701 | done_something = true; | |
5702 | ||
5703 | if (bus_type_is_container(type) > 0) { | |
5704 | ||
5705 | r = sd_bus_message_enter_container(source, type, contents); | |
5706 | if (r < 0) | |
5707 | return r; | |
5708 | ||
5709 | r = sd_bus_message_open_container(m, type, contents); | |
5710 | if (r < 0) | |
5711 | return r; | |
5712 | ||
5713 | r = sd_bus_message_copy(m, source, true); | |
5714 | if (r < 0) | |
5715 | return r; | |
5716 | ||
5717 | r = sd_bus_message_close_container(m); | |
5718 | if (r < 0) | |
5719 | return r; | |
5720 | ||
5721 | r = sd_bus_message_exit_container(source); | |
5722 | if (r < 0) | |
5723 | return r; | |
5724 | ||
5725 | continue; | |
5726 | } | |
5727 | ||
5728 | r = sd_bus_message_read_basic(source, type, &basic); | |
5729 | if (r < 0) | |
5730 | return r; | |
5731 | ||
5732 | assert(r > 0); | |
5733 | ||
945c2931 | 5734 | if (IN_SET(type, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE, SD_BUS_TYPE_STRING)) |
c430fee6 LP |
5735 | r = sd_bus_message_append_basic(m, type, basic.string); |
5736 | else | |
5737 | r = sd_bus_message_append_basic(m, type, &basic); | |
5738 | ||
5739 | if (r < 0) | |
5740 | return r; | |
5741 | ||
5742 | } while (all); | |
5743 | ||
5744 | return done_something; | |
5745 | } | |
5746 | ||
d9f644e2 | 5747 | _public_ int sd_bus_message_verify_type(sd_bus_message *m, char type, const char *contents) { |
c430fee6 LP |
5748 | const char *c; |
5749 | char t; | |
5750 | int r; | |
5751 | ||
5752 | assert_return(m, -EINVAL); | |
5753 | assert_return(m->sealed, -EPERM); | |
5754 | assert_return(!type || bus_type_is_valid(type), -EINVAL); | |
5755 | assert_return(!contents || signature_is_valid(contents, true), -EINVAL); | |
5756 | assert_return(type || contents, -EINVAL); | |
5757 | assert_return(!contents || !type || bus_type_is_container(type), -EINVAL); | |
5758 | ||
5759 | r = sd_bus_message_peek_type(m, &t, &c); | |
5760 | if (r <= 0) | |
5761 | return r; | |
5762 | ||
5763 | if (type != 0 && type != t) | |
5764 | return 0; | |
5765 | ||
5766 | if (contents && !streq_ptr(contents, c)) | |
5767 | return 0; | |
5768 | ||
5769 | return 1; | |
5770 | } | |
2be44176 LP |
5771 | |
5772 | _public_ sd_bus *sd_bus_message_get_bus(sd_bus_message *m) { | |
5773 | assert_return(m, NULL); | |
5774 | ||
5775 | return m->bus; | |
5776 | } | |
e1c433c6 LP |
5777 | |
5778 | int bus_message_remarshal(sd_bus *bus, sd_bus_message **m) { | |
4afd3348 | 5779 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *n = NULL; |
e1c433c6 LP |
5780 | usec_t timeout; |
5781 | int r; | |
5782 | ||
5783 | assert(bus); | |
5784 | assert(m); | |
5785 | assert(*m); | |
5786 | ||
5787 | switch ((*m)->header->type) { | |
5788 | ||
5789 | case SD_BUS_MESSAGE_SIGNAL: | |
151b9b96 | 5790 | r = sd_bus_message_new_signal(bus, &n, (*m)->path, (*m)->interface, (*m)->member); |
e1c433c6 LP |
5791 | if (r < 0) |
5792 | return r; | |
5793 | ||
5794 | break; | |
5795 | ||
5796 | case SD_BUS_MESSAGE_METHOD_CALL: | |
151b9b96 | 5797 | r = sd_bus_message_new_method_call(bus, &n, (*m)->destination, (*m)->path, (*m)->interface, (*m)->member); |
e1c433c6 LP |
5798 | if (r < 0) |
5799 | return r; | |
5800 | ||
5801 | break; | |
5802 | ||
5803 | case SD_BUS_MESSAGE_METHOD_RETURN: | |
5804 | case SD_BUS_MESSAGE_METHOD_ERROR: | |
5805 | ||
75bcbcf2 SA |
5806 | r = sd_bus_message_new(bus, &n, (*m)->header->type); |
5807 | if (r < 0) | |
e1c433c6 LP |
5808 | return -ENOMEM; |
5809 | ||
75bcbcf2 SA |
5810 | assert(n); |
5811 | ||
693eb9a2 | 5812 | n->reply_cookie = (*m)->reply_cookie; |
b267a6d2 LP |
5813 | |
5814 | r = message_append_reply_cookie(n, n->reply_cookie); | |
e1c433c6 LP |
5815 | if (r < 0) |
5816 | return r; | |
5817 | ||
5818 | if ((*m)->header->type == SD_BUS_MESSAGE_METHOD_ERROR && (*m)->error.name) { | |
5819 | r = message_append_field_string(n, BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, (*m)->error.name, &n->error.message); | |
5820 | if (r < 0) | |
5821 | return r; | |
5822 | ||
5823 | n->error._need_free = -1; | |
5824 | } | |
5825 | ||
5826 | break; | |
5827 | ||
5828 | default: | |
5829 | return -EINVAL; | |
5830 | } | |
5831 | ||
5832 | if ((*m)->destination && !n->destination) { | |
5833 | r = message_append_field_string(n, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, (*m)->destination, &n->destination); | |
5834 | if (r < 0) | |
5835 | return r; | |
5836 | } | |
5837 | ||
5838 | if ((*m)->sender && !n->sender) { | |
5839 | r = message_append_field_string(n, BUS_MESSAGE_HEADER_SENDER, SD_BUS_TYPE_STRING, (*m)->sender, &n->sender); | |
5840 | if (r < 0) | |
5841 | return r; | |
5842 | } | |
5843 | ||
5844 | n->header->flags |= (*m)->header->flags & (BUS_MESSAGE_NO_REPLY_EXPECTED|BUS_MESSAGE_NO_AUTO_START); | |
5845 | ||
5846 | r = sd_bus_message_copy(n, *m, true); | |
5847 | if (r < 0) | |
5848 | return r; | |
5849 | ||
5850 | timeout = (*m)->timeout; | |
5851 | if (timeout == 0 && !((*m)->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)) | |
5852 | timeout = BUS_DEFAULT_TIMEOUT; | |
5853 | ||
75bcbcf2 | 5854 | r = sd_bus_message_seal(n, BUS_MESSAGE_COOKIE(*m), timeout); |
e1c433c6 LP |
5855 | if (r < 0) |
5856 | return r; | |
5857 | ||
5858 | sd_bus_message_unref(*m); | |
5859 | *m = n; | |
5860 | n = NULL; | |
5861 | ||
5862 | return 0; | |
5863 | } | |
a7639e37 LP |
5864 | |
5865 | int bus_message_append_sender(sd_bus_message *m, const char *sender) { | |
5866 | assert(m); | |
5867 | assert(sender); | |
5868 | ||
5869 | assert_return(!m->sealed, -EPERM); | |
5870 | assert_return(!m->sender, -EPERM); | |
5871 | ||
5872 | return message_append_field_string(m, BUS_MESSAGE_HEADER_SENDER, SD_BUS_TYPE_STRING, sender, &m->sender); | |
5873 | } | |
ca7b42c8 LP |
5874 | |
5875 | _public_ int sd_bus_message_get_priority(sd_bus_message *m, int64_t *priority) { | |
5876 | assert_return(m, -EINVAL); | |
5877 | assert_return(priority, -EINVAL); | |
5878 | ||
5879 | *priority = m->priority; | |
5880 | return 0; | |
5881 | } | |
5882 | ||
5883 | _public_ int sd_bus_message_set_priority(sd_bus_message *m, int64_t priority) { | |
5884 | assert_return(m, -EINVAL); | |
5885 | assert_return(!m->sealed, -EPERM); | |
5886 | ||
5887 | m->priority = priority; | |
5888 | return 0; | |
5889 | } |