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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 | ||
bc7fd8cd | 130 | message_reset_containers(m); |
9a17484d | 131 | free(m->root_container.signature); |
6647dc66 | 132 | free(m->root_container.offsets); |
de1c301e | 133 | |
3798fd4c | 134 | free(m->root_container.peeked_signature); |
d8d3d8a7 | 135 | |
5b12334d | 136 | bus_creds_done(&m->creds); |
de1c301e LP |
137 | free(m); |
138 | } | |
139 | ||
c1b9d935 | 140 | static void *message_extend_fields(sd_bus_message *m, size_t align, size_t sz, bool add_offset) { |
c91cb83c LP |
141 | void *op, *np; |
142 | size_t old_size, new_size, start; | |
de1c301e | 143 | |
c91cb83c | 144 | assert(m); |
35460afc LP |
145 | |
146 | if (m->poisoned) | |
147 | return NULL; | |
de1c301e | 148 | |
2ac7c17f | 149 | old_size = sizeof(struct bus_header) + m->fields_size; |
c91cb83c LP |
150 | start = ALIGN_TO(old_size, align); |
151 | new_size = start + sz; | |
de1c301e | 152 | |
2ac7c17f LP |
153 | if (new_size < start || |
154 | new_size > (size_t) ((uint32_t) -1)) | |
155 | goto poison; | |
156 | ||
c91cb83c LP |
157 | if (old_size == new_size) |
158 | return (uint8_t*) m->header + old_size; | |
de1c301e | 159 | |
c91cb83c LP |
160 | if (m->free_header) { |
161 | np = realloc(m->header, ALIGN8(new_size)); | |
162 | if (!np) | |
163 | goto poison; | |
164 | } else { | |
61233823 | 165 | /* Initially, the header is allocated as part of |
c91cb83c LP |
166 | * the sd_bus_message itself, let's replace it by |
167 | * dynamic data */ | |
de1c301e | 168 | |
c91cb83c LP |
169 | np = malloc(ALIGN8(new_size)); |
170 | if (!np) | |
171 | goto poison; | |
de1c301e | 172 | |
c91cb83c LP |
173 | memcpy(np, m->header, sizeof(struct bus_header)); |
174 | } | |
de1c301e | 175 | |
c91cb83c LP |
176 | /* Zero out padding */ |
177 | if (start > old_size) | |
29804cc1 | 178 | memzero((uint8_t*) np + old_size, start - old_size); |
bc7fd8cd | 179 | |
c91cb83c LP |
180 | op = m->header; |
181 | m->header = np; | |
2ac7c17f | 182 | m->fields_size = new_size - sizeof(struct bus_header); |
de1c301e | 183 | |
bc7fd8cd | 184 | /* Adjust quick access pointers */ |
c91cb83c LP |
185 | m->path = adjust_pointer(m->path, op, old_size, m->header); |
186 | m->interface = adjust_pointer(m->interface, op, old_size, m->header); | |
187 | m->member = adjust_pointer(m->member, op, old_size, m->header); | |
188 | m->destination = adjust_pointer(m->destination, op, old_size, m->header); | |
189 | m->sender = adjust_pointer(m->sender, op, old_size, m->header); | |
190 | m->error.name = adjust_pointer(m->error.name, op, old_size, m->header); | |
bc7fd8cd | 191 | |
c91cb83c | 192 | m->free_header = true; |
de1c301e | 193 | |
c1b9d935 LP |
194 | if (add_offset) { |
195 | if (m->n_header_offsets >= ELEMENTSOF(m->header_offsets)) | |
196 | goto poison; | |
197 | ||
198 | m->header_offsets[m->n_header_offsets++] = new_size - sizeof(struct bus_header); | |
199 | } | |
200 | ||
c91cb83c LP |
201 | return (uint8_t*) np + start; |
202 | ||
203 | poison: | |
204 | m->poisoned = true; | |
205 | return NULL; | |
de1c301e LP |
206 | } |
207 | ||
208 | static int message_append_field_string( | |
209 | sd_bus_message *m, | |
2ac7c17f | 210 | uint64_t h, |
de1c301e LP |
211 | char type, |
212 | const char *s, | |
213 | const char **ret) { | |
214 | ||
215 | size_t l; | |
216 | uint8_t *p; | |
217 | ||
218 | assert(m); | |
219 | ||
2ac7c17f LP |
220 | /* dbus1 only allows 8bit header field ids */ |
221 | if (h > 0xFF) | |
222 | return -EINVAL; | |
223 | ||
c1b9d935 LP |
224 | /* dbus1 doesn't allow strings over 32bit, let's enforce this |
225 | * globally, to not risk convertability */ | |
de1c301e LP |
226 | l = strlen(s); |
227 | if (l > (size_t) (uint32_t) -1) | |
228 | return -EINVAL; | |
229 | ||
c1b9d935 LP |
230 | /* Signature "(yv)" where the variant contains "s" */ |
231 | ||
6647dc66 | 232 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
de1c301e | 233 | |
2ac7c17f LP |
234 | /* (field id 64bit, ((string + NUL) + NUL + signature string 's') */ |
235 | p = message_extend_fields(m, 8, 8 + l + 1 + 1 + 1, true); | |
c1b9d935 LP |
236 | if (!p) |
237 | return -ENOMEM; | |
de1c301e | 238 | |
2ac7c17f | 239 | *((uint64_t*) p) = h; |
c1b9d935 LP |
240 | memcpy(p+8, s, l); |
241 | p[8+l] = 0; | |
242 | p[8+l+1] = 0; | |
243 | p[8+l+2] = type; | |
de1c301e | 244 | |
c1b9d935 | 245 | if (ret) |
6647dc66 | 246 | *ret = (char*) p + 8; |
c1b9d935 LP |
247 | |
248 | } else { | |
249 | /* (field id byte + (signature length + signature 's' + NUL) + (string length + string + NUL)) */ | |
250 | p = message_extend_fields(m, 8, 4 + 4 + l + 1, false); | |
251 | if (!p) | |
252 | return -ENOMEM; | |
253 | ||
2ac7c17f | 254 | p[0] = (uint8_t) h; |
c1b9d935 LP |
255 | p[1] = 1; |
256 | p[2] = type; | |
257 | p[3] = 0; | |
258 | ||
259 | ((uint32_t*) p)[1] = l; | |
260 | memcpy(p + 8, s, l + 1); | |
261 | ||
262 | if (ret) | |
263 | *ret = (char*) p + 8; | |
264 | } | |
de1c301e LP |
265 | |
266 | return 0; | |
267 | } | |
268 | ||
269 | static int message_append_field_signature( | |
270 | sd_bus_message *m, | |
2ac7c17f | 271 | uint64_t h, |
de1c301e LP |
272 | const char *s, |
273 | const char **ret) { | |
274 | ||
275 | size_t l; | |
276 | uint8_t *p; | |
277 | ||
278 | assert(m); | |
279 | ||
2ac7c17f LP |
280 | /* dbus1 only allows 8bit header field ids */ |
281 | if (h > 0xFF) | |
282 | return -EINVAL; | |
283 | ||
284 | /* dbus1 doesn't allow signatures over 8bit, let's enforce | |
c1b9d935 | 285 | * this globally, to not risk convertability */ |
de1c301e LP |
286 | l = strlen(s); |
287 | if (l > 255) | |
288 | return -EINVAL; | |
289 | ||
c1b9d935 LP |
290 | /* Signature "(yv)" where the variant contains "g" */ |
291 | ||
6647dc66 | 292 | if (BUS_MESSAGE_IS_GVARIANT(m)) |
c1b9d935 LP |
293 | /* For gvariant the serialization is the same as for normal strings */ |
294 | return message_append_field_string(m, h, 'g', s, ret); | |
295 | else { | |
296 | /* (field id byte + (signature length + signature 'g' + NUL) + (string length + string + NUL)) */ | |
297 | p = message_extend_fields(m, 8, 4 + 1 + l + 1, false); | |
298 | if (!p) | |
299 | return -ENOMEM; | |
de1c301e | 300 | |
2ac7c17f | 301 | p[0] = (uint8_t) h; |
c1b9d935 LP |
302 | p[1] = 1; |
303 | p[2] = SD_BUS_TYPE_SIGNATURE; | |
304 | p[3] = 0; | |
305 | p[4] = l; | |
306 | memcpy(p + 5, s, l + 1); | |
de1c301e | 307 | |
c1b9d935 LP |
308 | if (ret) |
309 | *ret = (const char*) p + 5; | |
310 | } | |
de1c301e LP |
311 | |
312 | return 0; | |
313 | } | |
314 | ||
2ac7c17f | 315 | static int message_append_field_uint32(sd_bus_message *m, uint64_t h, uint32_t x) { |
de1c301e LP |
316 | uint8_t *p; |
317 | ||
318 | assert(m); | |
319 | ||
2ac7c17f LP |
320 | /* dbus1 only allows 8bit header field ids */ |
321 | if (h > 0xFF) | |
322 | return -EINVAL; | |
323 | ||
6647dc66 | 324 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f | 325 | /* (field id 64bit + ((value + NUL + signature string 'u') */ |
c1b9d935 | 326 | |
2ac7c17f | 327 | p = message_extend_fields(m, 8, 8 + 4 + 1 + 1, true); |
c1b9d935 LP |
328 | if (!p) |
329 | return -ENOMEM; | |
de1c301e | 330 | |
2ac7c17f | 331 | *((uint64_t*) p) = h; |
c1b9d935 LP |
332 | *((uint32_t*) (p + 8)) = x; |
333 | p[12] = 0; | |
334 | p[13] = 'u'; | |
335 | } else { | |
336 | /* (field id byte + (signature length + signature 'u' + NUL) + value) */ | |
337 | p = message_extend_fields(m, 8, 4 + 4, false); | |
338 | if (!p) | |
339 | return -ENOMEM; | |
340 | ||
2ac7c17f | 341 | p[0] = (uint8_t) h; |
c1b9d935 | 342 | p[1] = 1; |
2ac7c17f | 343 | p[2] = 'u'; |
c1b9d935 | 344 | p[3] = 0; |
de1c301e | 345 | |
c1b9d935 LP |
346 | ((uint32_t*) p)[1] = x; |
347 | } | |
de1c301e LP |
348 | |
349 | return 0; | |
350 | } | |
351 | ||
2ac7c17f LP |
352 | static int message_append_field_uint64(sd_bus_message *m, uint64_t h, uint64_t x) { |
353 | uint8_t *p; | |
354 | ||
355 | assert(m); | |
356 | ||
357 | /* dbus1 only allows 8bit header field ids */ | |
358 | if (h > 0xFF) | |
359 | return -EINVAL; | |
360 | ||
361 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
362 | /* (field id 64bit + ((value + NUL + signature string 't') */ | |
363 | ||
364 | p = message_extend_fields(m, 8, 8 + 8 + 1 + 1, true); | |
365 | if (!p) | |
366 | return -ENOMEM; | |
367 | ||
368 | *((uint64_t*) p) = h; | |
369 | *((uint64_t*) (p + 8)) = x; | |
370 | p[16] = 0; | |
371 | p[17] = 't'; | |
372 | } else { | |
373 | /* (field id byte + (signature length + signature 't' + NUL) + 4 byte padding + value) */ | |
374 | p = message_extend_fields(m, 8, 4 + 4 + 8, false); | |
375 | if (!p) | |
376 | return -ENOMEM; | |
377 | ||
378 | p[0] = (uint8_t) h; | |
379 | p[1] = 1; | |
380 | p[2] = 't'; | |
381 | p[3] = 0; | |
382 | p[4] = 0; | |
383 | p[5] = 0; | |
384 | p[6] = 0; | |
385 | p[7] = 0; | |
386 | ||
387 | ((uint64_t*) p)[1] = x; | |
388 | } | |
389 | ||
390 | return 0; | |
391 | } | |
392 | ||
b267a6d2 LP |
393 | static int message_append_reply_cookie(sd_bus_message *m, uint64_t cookie) { |
394 | assert(m); | |
395 | ||
396 | if (BUS_MESSAGE_IS_GVARIANT(m)) | |
397 | return message_append_field_uint64(m, BUS_MESSAGE_HEADER_REPLY_SERIAL, cookie); | |
398 | else { | |
399 | /* 64bit cookies are not supported on dbus1 */ | |
400 | if (cookie > 0xffffffffUL) | |
15411c0c | 401 | return -EOPNOTSUPP; |
b267a6d2 LP |
402 | |
403 | return message_append_field_uint32(m, BUS_MESSAGE_HEADER_REPLY_SERIAL, (uint32_t) cookie); | |
404 | } | |
405 | } | |
406 | ||
6629161f | 407 | int bus_message_from_header( |
df2d202e | 408 | sd_bus *bus, |
2ac7c17f LP |
409 | void *header, |
410 | size_t header_accessible, | |
411 | void *footer, | |
412 | size_t footer_accessible, | |
413 | size_t message_size, | |
2c93b4ef LP |
414 | int *fds, |
415 | unsigned n_fds, | |
2571ead1 | 416 | const char *label, |
6629161f | 417 | size_t extra, |
2571ead1 LP |
418 | sd_bus_message **ret) { |
419 | ||
bcf88fc3 | 420 | _cleanup_free_ sd_bus_message *m = NULL; |
80a46c73 | 421 | struct bus_header *h; |
6629161f | 422 | size_t a, label_sz; |
80a46c73 | 423 | |
2a0958d2 | 424 | assert(bus); |
2ac7c17f LP |
425 | assert(header || header_accessible <= 0); |
426 | assert(footer || footer_accessible <= 0); | |
2c93b4ef | 427 | assert(fds || n_fds <= 0); |
80a46c73 LP |
428 | assert(ret); |
429 | ||
2ac7c17f | 430 | if (header_accessible < sizeof(struct bus_header)) |
80a46c73 LP |
431 | return -EBADMSG; |
432 | ||
2ac7c17f LP |
433 | if (header_accessible > message_size) |
434 | return -EBADMSG; | |
435 | if (footer_accessible > message_size) | |
80a46c73 LP |
436 | return -EBADMSG; |
437 | ||
2ac7c17f | 438 | h = header; |
bcf88fc3 | 439 | if (!IN_SET(h->version, 1, 2)) |
954871d8 KS |
440 | return -EBADMSG; |
441 | ||
80a46c73 LP |
442 | if (h->type == _SD_BUS_MESSAGE_TYPE_INVALID) |
443 | return -EBADMSG; | |
444 | ||
bcf88fc3 | 445 | if (!IN_SET(h->endian, BUS_LITTLE_ENDIAN, BUS_BIG_ENDIAN)) |
80a46c73 LP |
446 | return -EBADMSG; |
447 | ||
2ac7c17f LP |
448 | /* Note that we are happy with unknown flags in the flags header! */ |
449 | ||
6629161f | 450 | a = ALIGN(sizeof(sd_bus_message)) + ALIGN(extra); |
80a46c73 | 451 | |
2571ead1 LP |
452 | if (label) { |
453 | label_sz = strlen(label); | |
6629161f LP |
454 | a += label_sz + 1; |
455 | } | |
2571ead1 LP |
456 | |
457 | m = malloc0(a); | |
80a46c73 LP |
458 | if (!m) |
459 | return -ENOMEM; | |
460 | ||
461 | m->n_ref = 1; | |
2c93b4ef | 462 | m->sealed = true; |
2ac7c17f LP |
463 | m->header = header; |
464 | m->header_accessible = header_accessible; | |
465 | m->footer = footer; | |
466 | m->footer_accessible = footer_accessible; | |
467 | ||
468 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
469 | size_t ws; | |
470 | ||
471 | if (h->dbus2.cookie == 0) | |
472 | return -EBADMSG; | |
473 | ||
474 | /* dbus2 derives the sizes from the message size and | |
475 | the offset table at the end, since it is formatted as | |
476 | gvariant "yyyyuta{tv}v". Since the message itself is a | |
477 | structure with precisely to variable sized entries, | |
478 | there's only one offset in the table, which marks the | |
479 | end of the fields array. */ | |
480 | ||
481 | ws = bus_gvariant_determine_word_size(message_size, 0); | |
482 | if (footer_accessible < ws) | |
483 | return -EBADMSG; | |
484 | ||
485 | m->fields_size = bus_gvariant_read_word_le((uint8_t*) footer + footer_accessible - ws, ws); | |
486 | if (ALIGN8(m->fields_size) > message_size - ws) | |
487 | return -EBADMSG; | |
488 | if (m->fields_size < sizeof(struct bus_header)) | |
489 | return -EBADMSG; | |
490 | ||
491 | m->fields_size -= sizeof(struct bus_header); | |
492 | m->body_size = message_size - (sizeof(struct bus_header) + ALIGN8(m->fields_size)); | |
493 | } else { | |
494 | if (h->dbus1.serial == 0) | |
495 | return -EBADMSG; | |
496 | ||
497 | /* dbus1 has the sizes in the header */ | |
498 | m->fields_size = BUS_MESSAGE_BSWAP32(m, h->dbus1.fields_size); | |
499 | m->body_size = BUS_MESSAGE_BSWAP32(m, h->dbus1.body_size); | |
500 | ||
501 | if (sizeof(struct bus_header) + ALIGN8(m->fields_size) + m->body_size != message_size) | |
502 | return -EBADMSG; | |
503 | } | |
504 | ||
2c93b4ef LP |
505 | m->fds = fds; |
506 | m->n_fds = n_fds; | |
80a46c73 | 507 | |
2571ead1 | 508 | if (label) { |
5b12334d LP |
509 | m->creds.label = (char*) m + ALIGN(sizeof(sd_bus_message)) + ALIGN(extra); |
510 | memcpy(m->creds.label, label, label_sz + 1); | |
511 | ||
512 | m->creds.mask |= SD_BUS_CREDS_SELINUX_CONTEXT; | |
2571ead1 LP |
513 | } |
514 | ||
2a0958d2 | 515 | m->bus = sd_bus_ref(bus); |
6629161f | 516 | *ret = m; |
bcf88fc3 | 517 | m = NULL; |
2a0958d2 | 518 | |
6629161f LP |
519 | return 0; |
520 | } | |
521 | ||
522 | int bus_message_from_malloc( | |
df2d202e | 523 | sd_bus *bus, |
6629161f LP |
524 | void *buffer, |
525 | size_t length, | |
526 | int *fds, | |
527 | unsigned n_fds, | |
6629161f LP |
528 | const char *label, |
529 | sd_bus_message **ret) { | |
530 | ||
531 | sd_bus_message *m; | |
5461f53f | 532 | size_t sz; |
6629161f LP |
533 | int r; |
534 | ||
2ac7c17f LP |
535 | r = bus_message_from_header( |
536 | bus, | |
537 | buffer, length, /* in this case the initial bytes and the final bytes are the same */ | |
538 | buffer, length, | |
539 | length, | |
540 | fds, n_fds, | |
aa0d0ed6 | 541 | label, |
2ac7c17f | 542 | 0, &m); |
6629161f LP |
543 | if (r < 0) |
544 | return r; | |
545 | ||
2ac7c17f | 546 | sz = length - sizeof(struct bus_header) - ALIGN8(m->fields_size); |
5461f53f LP |
547 | if (sz > 0) { |
548 | m->n_body_parts = 1; | |
2ac7c17f | 549 | m->body.data = (uint8_t*) buffer + sizeof(struct bus_header) + ALIGN8(m->fields_size); |
5461f53f LP |
550 | m->body.size = sz; |
551 | m->body.sealed = true; | |
552 | m->body.memfd = -1; | |
553 | } | |
6629161f | 554 | |
80a46c73 | 555 | m->n_iovec = 1; |
bc7fd8cd | 556 | m->iovec = m->iovec_fixed; |
80a46c73 LP |
557 | m->iovec[0].iov_base = buffer; |
558 | m->iovec[0].iov_len = length; | |
559 | ||
6629161f | 560 | r = bus_message_parse_fields(m); |
2c93b4ef LP |
561 | if (r < 0) |
562 | goto fail; | |
563 | ||
564 | /* We take possession of the memory and fds now */ | |
565 | m->free_header = true; | |
566 | m->free_fds = true; | |
80a46c73 LP |
567 | |
568 | *ret = m; | |
569 | return 0; | |
2c93b4ef LP |
570 | |
571 | fail: | |
572 | message_free(m); | |
573 | return r; | |
80a46c73 LP |
574 | } |
575 | ||
75bcbcf2 SA |
576 | _public_ int sd_bus_message_new( |
577 | sd_bus *bus, | |
578 | sd_bus_message **m, | |
579 | uint8_t type) { | |
de1c301e | 580 | |
75bcbcf2 | 581 | sd_bus_message *t; |
2a0958d2 | 582 | |
75bcbcf2 SA |
583 | assert_return(bus, -ENOTCONN); |
584 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
585 | assert_return(m, -EINVAL); | |
41f23fe8 | 586 | assert_return(type < _SD_BUS_MESSAGE_TYPE_MAX, -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; | |
f581267a | 709 | uint64_t cookie; |
de1c301e LP |
710 | int r; |
711 | ||
9d6c7c82 LP |
712 | assert_return(call, -EINVAL); |
713 | assert_return(call->sealed, -EPERM); | |
714 | assert_return(call->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); | |
2a0958d2 | 715 | assert_return(call->bus->state != BUS_UNSET, -ENOTCONN); |
9d6c7c82 | 716 | assert_return(m, -EINVAL); |
de1c301e | 717 | |
f581267a CW |
718 | cookie = BUS_MESSAGE_COOKIE(call); |
719 | if (cookie == 0) | |
720 | return -EOPNOTSUPP; | |
721 | ||
75bcbcf2 SA |
722 | r = sd_bus_message_new(call->bus, &t, type); |
723 | if (r < 0) | |
de1c301e LP |
724 | return -ENOMEM; |
725 | ||
75bcbcf2 SA |
726 | assert(t); |
727 | ||
0461f8cd | 728 | t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
f581267a | 729 | t->reply_cookie = cookie; |
b267a6d2 | 730 | r = message_append_reply_cookie(t, t->reply_cookie); |
de1c301e LP |
731 | if (r < 0) |
732 | goto fail; | |
733 | ||
734 | if (call->sender) { | |
0461f8cd | 735 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, call->sender, &t->destination); |
de1c301e LP |
736 | if (r < 0) |
737 | goto fail; | |
738 | } | |
739 | ||
0461f8cd | 740 | t->dont_send = !!(call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED); |
6717d473 | 741 | t->enforced_reply_signature = call->enforced_reply_signature; |
5407f2de | 742 | |
de1c301e | 743 | *m = t; |
89ffcd2a | 744 | return 0; |
de1c301e LP |
745 | |
746 | fail: | |
747 | message_free(t); | |
748 | return r; | |
749 | } | |
750 | ||
d9f644e2 | 751 | _public_ int sd_bus_message_new_method_return( |
5407f2de LP |
752 | sd_bus_message *call, |
753 | sd_bus_message **m) { | |
754 | ||
df2d202e | 755 | return message_new_reply(call, SD_BUS_MESSAGE_METHOD_RETURN, m); |
5407f2de LP |
756 | } |
757 | ||
d9f644e2 | 758 | _public_ int sd_bus_message_new_method_error( |
de1c301e | 759 | sd_bus_message *call, |
151b9b96 LP |
760 | sd_bus_message **m, |
761 | const sd_bus_error *e) { | |
de1c301e LP |
762 | |
763 | sd_bus_message *t; | |
764 | int r; | |
765 | ||
9d6c7c82 LP |
766 | assert_return(sd_bus_error_is_set(e), -EINVAL); |
767 | assert_return(m, -EINVAL); | |
de1c301e | 768 | |
df2d202e | 769 | r = message_new_reply(call, SD_BUS_MESSAGE_METHOD_ERROR, &t); |
de1c301e | 770 | if (r < 0) |
5407f2de | 771 | return r; |
de1c301e | 772 | |
0461f8cd | 773 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name); |
de1c301e LP |
774 | if (r < 0) |
775 | goto fail; | |
776 | ||
777 | if (e->message) { | |
778 | r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message); | |
779 | if (r < 0) | |
780 | goto fail; | |
781 | } | |
782 | ||
79f8d3d2 LP |
783 | t->error._need_free = -1; |
784 | ||
de1c301e LP |
785 | *m = t; |
786 | return 0; | |
787 | ||
788 | fail: | |
789 | message_free(t); | |
790 | return r; | |
791 | } | |
792 | ||
d9f644e2 | 793 | _public_ int sd_bus_message_new_method_errorf( |
29ddb38f LP |
794 | sd_bus_message *call, |
795 | sd_bus_message **m, | |
796 | const char *name, | |
797 | const char *format, | |
798 | ...) { | |
799 | ||
4afd3348 | 800 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
29ddb38f | 801 | va_list ap; |
29ddb38f | 802 | |
40ca29a1 LP |
803 | assert_return(name, -EINVAL); |
804 | assert_return(m, -EINVAL); | |
805 | ||
806 | va_start(ap, format); | |
780896a4 | 807 | bus_error_setfv(&error, name, format, ap); |
40ca29a1 | 808 | va_end(ap); |
29ddb38f | 809 | |
151b9b96 | 810 | return sd_bus_message_new_method_error(call, m, &error); |
40ca29a1 | 811 | } |
29ddb38f | 812 | |
d9f644e2 | 813 | _public_ int sd_bus_message_new_method_errno( |
40ca29a1 | 814 | sd_bus_message *call, |
151b9b96 | 815 | sd_bus_message **m, |
40ca29a1 | 816 | int error, |
151b9b96 | 817 | const sd_bus_error *p) { |
29ddb38f | 818 | |
4afd3348 | 819 | _cleanup_(sd_bus_error_free) sd_bus_error berror = SD_BUS_ERROR_NULL; |
29ddb38f | 820 | |
40ca29a1 | 821 | if (sd_bus_error_is_set(p)) |
151b9b96 | 822 | return sd_bus_message_new_method_error(call, m, p); |
29ddb38f | 823 | |
40ca29a1 | 824 | sd_bus_error_set_errno(&berror, error); |
29ddb38f | 825 | |
151b9b96 | 826 | return sd_bus_message_new_method_error(call, m, &berror); |
40ca29a1 | 827 | } |
29ddb38f | 828 | |
d9f644e2 | 829 | _public_ int sd_bus_message_new_method_errnof( |
40ca29a1 LP |
830 | sd_bus_message *call, |
831 | sd_bus_message **m, | |
832 | int error, | |
833 | const char *format, | |
834 | ...) { | |
835 | ||
4afd3348 | 836 | _cleanup_(sd_bus_error_free) sd_bus_error berror = SD_BUS_ERROR_NULL; |
40ca29a1 | 837 | va_list ap; |
40ca29a1 LP |
838 | |
839 | va_start(ap, format); | |
07a0d22f | 840 | sd_bus_error_set_errnofv(&berror, error, format, ap); |
40ca29a1 LP |
841 | va_end(ap); |
842 | ||
151b9b96 | 843 | return sd_bus_message_new_method_error(call, m, &berror); |
29ddb38f LP |
844 | } |
845 | ||
d29ae291 LP |
846 | void bus_message_set_sender_local(sd_bus *bus, sd_bus_message *m) { |
847 | assert(bus); | |
848 | assert(m); | |
849 | ||
850 | m->sender = m->creds.unique_name = (char*) "org.freedesktop.DBus.Local"; | |
851 | m->creds.well_known_names_local = true; | |
852 | m->creds.mask |= (SD_BUS_CREDS_UNIQUE_NAME|SD_BUS_CREDS_WELL_KNOWN_NAMES) & bus->creds_mask; | |
853 | } | |
854 | ||
855 | void bus_message_set_sender_driver(sd_bus *bus, sd_bus_message *m) { | |
856 | assert(bus); | |
857 | assert(m); | |
858 | ||
859 | m->sender = m->creds.unique_name = (char*) "org.freedesktop.DBus"; | |
860 | m->creds.well_known_names_driver = true; | |
861 | m->creds.mask |= (SD_BUS_CREDS_UNIQUE_NAME|SD_BUS_CREDS_WELL_KNOWN_NAMES) & bus->creds_mask; | |
862 | } | |
863 | ||
eb01ba5d LP |
864 | int bus_message_new_synthetic_error( |
865 | sd_bus *bus, | |
693eb9a2 | 866 | uint64_t cookie, |
eb01ba5d LP |
867 | const sd_bus_error *e, |
868 | sd_bus_message **m) { | |
869 | ||
870 | sd_bus_message *t; | |
871 | int r; | |
872 | ||
2a0958d2 | 873 | assert(bus); |
eb01ba5d LP |
874 | assert(sd_bus_error_is_set(e)); |
875 | assert(m); | |
876 | ||
75bcbcf2 SA |
877 | r = sd_bus_message_new(bus, &t, SD_BUS_MESSAGE_METHOD_ERROR); |
878 | if (r < 0) | |
eb01ba5d LP |
879 | return -ENOMEM; |
880 | ||
75bcbcf2 SA |
881 | assert(t); |
882 | ||
0461f8cd | 883 | t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
693eb9a2 | 884 | t->reply_cookie = cookie; |
eb01ba5d | 885 | |
b267a6d2 | 886 | r = message_append_reply_cookie(t, t->reply_cookie); |
eb01ba5d LP |
887 | if (r < 0) |
888 | goto fail; | |
889 | ||
890 | if (bus && bus->unique_name) { | |
0461f8cd | 891 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, bus->unique_name, &t->destination); |
eb01ba5d LP |
892 | if (r < 0) |
893 | goto fail; | |
894 | } | |
895 | ||
0461f8cd | 896 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name); |
3a7d4f1b LP |
897 | if (r < 0) |
898 | goto fail; | |
899 | ||
900 | if (e->message) { | |
901 | r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message); | |
902 | if (r < 0) | |
903 | goto fail; | |
904 | } | |
905 | ||
79f8d3d2 LP |
906 | t->error._need_free = -1; |
907 | ||
d29ae291 LP |
908 | bus_message_set_sender_driver(bus, t); |
909 | ||
eb01ba5d LP |
910 | *m = t; |
911 | return 0; | |
912 | ||
913 | fail: | |
914 | message_free(t); | |
915 | return r; | |
916 | } | |
917 | ||
d9f644e2 | 918 | _public_ sd_bus_message* sd_bus_message_ref(sd_bus_message *m) { |
4afd3348 LP |
919 | |
920 | if (!m) | |
921 | return NULL; | |
de1c301e LP |
922 | |
923 | assert(m->n_ref > 0); | |
924 | m->n_ref++; | |
925 | ||
926 | return m; | |
927 | } | |
928 | ||
d9f644e2 | 929 | _public_ sd_bus_message* sd_bus_message_unref(sd_bus_message *m) { |
5b1bc83f LP |
930 | |
931 | if (!m) | |
932 | return NULL; | |
de1c301e LP |
933 | |
934 | assert(m->n_ref > 0); | |
935 | m->n_ref--; | |
936 | ||
b5eca3a2 LP |
937 | if (m->n_ref > 0) |
938 | return NULL; | |
de1c301e | 939 | |
b5eca3a2 | 940 | message_free(m); |
de1c301e LP |
941 | return NULL; |
942 | } | |
943 | ||
d9f644e2 | 944 | _public_ int sd_bus_message_get_type(sd_bus_message *m, uint8_t *type) { |
9d6c7c82 LP |
945 | assert_return(m, -EINVAL); |
946 | assert_return(type, -EINVAL); | |
de1c301e LP |
947 | |
948 | *type = m->header->type; | |
949 | return 0; | |
950 | } | |
951 | ||
693eb9a2 | 952 | _public_ int sd_bus_message_get_cookie(sd_bus_message *m, uint64_t *cookie) { |
2ac7c17f LP |
953 | uint64_t c; |
954 | ||
9d6c7c82 | 955 | assert_return(m, -EINVAL); |
693eb9a2 | 956 | assert_return(cookie, -EINVAL); |
2ac7c17f LP |
957 | |
958 | c = BUS_MESSAGE_COOKIE(m); | |
959 | if (c == 0) | |
960 | return -ENODATA; | |
de1c301e | 961 | |
693eb9a2 | 962 | *cookie = BUS_MESSAGE_COOKIE(m); |
de1c301e LP |
963 | return 0; |
964 | } | |
965 | ||
693eb9a2 | 966 | _public_ int sd_bus_message_get_reply_cookie(sd_bus_message *m, uint64_t *cookie) { |
9d6c7c82 | 967 | assert_return(m, -EINVAL); |
693eb9a2 | 968 | assert_return(cookie, -EINVAL); |
2ac7c17f LP |
969 | |
970 | if (m->reply_cookie == 0) | |
971 | return -ENODATA; | |
de1c301e | 972 | |
693eb9a2 | 973 | *cookie = m->reply_cookie; |
de1c301e LP |
974 | return 0; |
975 | } | |
976 | ||
eee9ec0e | 977 | _public_ int sd_bus_message_get_expect_reply(sd_bus_message *m) { |
9d6c7c82 | 978 | assert_return(m, -EINVAL); |
de1c301e | 979 | |
eee9ec0e LP |
980 | return m->header->type == SD_BUS_MESSAGE_METHOD_CALL && |
981 | !(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED); | |
de1c301e LP |
982 | } |
983 | ||
eee9ec0e | 984 | _public_ int sd_bus_message_get_auto_start(sd_bus_message *m) { |
1fee9de5 LP |
985 | assert_return(m, -EINVAL); |
986 | ||
eee9ec0e | 987 | return !(m->header->flags & BUS_MESSAGE_NO_AUTO_START); |
1fee9de5 LP |
988 | } |
989 | ||
53a83f4b LP |
990 | _public_ int sd_bus_message_get_allow_interactive_authorization(sd_bus_message *m) { |
991 | assert_return(m, -EINVAL); | |
992 | ||
993 | return m->header->type == SD_BUS_MESSAGE_METHOD_CALL && | |
994 | (m->header->flags & BUS_MESSAGE_ALLOW_INTERACTIVE_AUTHORIZATION); | |
995 | } | |
996 | ||
d9f644e2 | 997 | _public_ const char *sd_bus_message_get_path(sd_bus_message *m) { |
9d6c7c82 | 998 | assert_return(m, NULL); |
de1c301e LP |
999 | |
1000 | return m->path; | |
1001 | } | |
1002 | ||
d9f644e2 | 1003 | _public_ const char *sd_bus_message_get_interface(sd_bus_message *m) { |
9d6c7c82 | 1004 | assert_return(m, NULL); |
de1c301e LP |
1005 | |
1006 | return m->interface; | |
1007 | } | |
1008 | ||
d9f644e2 | 1009 | _public_ const char *sd_bus_message_get_member(sd_bus_message *m) { |
9d6c7c82 | 1010 | assert_return(m, NULL); |
de1c301e LP |
1011 | |
1012 | return m->member; | |
1013 | } | |
d9f644e2 ZJS |
1014 | |
1015 | _public_ const char *sd_bus_message_get_destination(sd_bus_message *m) { | |
9d6c7c82 | 1016 | assert_return(m, NULL); |
de1c301e LP |
1017 | |
1018 | return m->destination; | |
1019 | } | |
1020 | ||
d9f644e2 | 1021 | _public_ const char *sd_bus_message_get_sender(sd_bus_message *m) { |
9d6c7c82 | 1022 | assert_return(m, NULL); |
de1c301e LP |
1023 | |
1024 | return m->sender; | |
1025 | } | |
1026 | ||
d9f644e2 | 1027 | _public_ const sd_bus_error *sd_bus_message_get_error(sd_bus_message *m) { |
9d6c7c82 | 1028 | assert_return(m, NULL); |
f02b9615 LP |
1029 | |
1030 | if (!sd_bus_error_is_set(&m->error)) | |
1031 | return NULL; | |
de1c301e LP |
1032 | |
1033 | return &m->error; | |
1034 | } | |
1035 | ||
1fedcf59 | 1036 | _public_ int sd_bus_message_get_monotonic_usec(sd_bus_message *m, uint64_t *usec) { |
9d6c7c82 LP |
1037 | assert_return(m, -EINVAL); |
1038 | assert_return(usec, -EINVAL); | |
1fedcf59 LP |
1039 | |
1040 | if (m->monotonic <= 0) | |
1041 | return -ENODATA; | |
acb5a3cb | 1042 | |
69aec65c | 1043 | *usec = m->monotonic; |
acb5a3cb LP |
1044 | return 0; |
1045 | } | |
1046 | ||
1fedcf59 | 1047 | _public_ int sd_bus_message_get_realtime_usec(sd_bus_message *m, uint64_t *usec) { |
9d6c7c82 LP |
1048 | assert_return(m, -EINVAL); |
1049 | assert_return(usec, -EINVAL); | |
1fedcf59 LP |
1050 | |
1051 | if (m->realtime <= 0) | |
1052 | return -ENODATA; | |
69aec65c LP |
1053 | |
1054 | *usec = m->realtime; | |
1055 | return 0; | |
1056 | } | |
1057 | ||
6a0e376c LP |
1058 | _public_ int sd_bus_message_get_seqnum(sd_bus_message *m, uint64_t *seqnum) { |
1059 | assert_return(m, -EINVAL); | |
1060 | assert_return(seqnum, -EINVAL); | |
1fedcf59 LP |
1061 | |
1062 | if (m->seqnum <= 0) | |
1063 | return -ENODATA; | |
6a0e376c LP |
1064 | |
1065 | *seqnum = m->seqnum; | |
1066 | return 0; | |
1067 | } | |
1068 | ||
5b12334d LP |
1069 | _public_ sd_bus_creds *sd_bus_message_get_creds(sd_bus_message *m) { |
1070 | assert_return(m, NULL); | |
102ea8e4 | 1071 | |
5b12334d LP |
1072 | if (m->creds.mask == 0) |
1073 | return NULL; | |
102ea8e4 | 1074 | |
5b12334d | 1075 | return &m->creds; |
102ea8e4 LP |
1076 | } |
1077 | ||
2ac7c17f LP |
1078 | _public_ int sd_bus_message_is_signal( |
1079 | sd_bus_message *m, | |
1080 | const char *interface, | |
1081 | const char *member) { | |
1082 | ||
9d6c7c82 | 1083 | assert_return(m, -EINVAL); |
de1c301e | 1084 | |
40ca29a1 | 1085 | if (m->header->type != SD_BUS_MESSAGE_SIGNAL) |
de1c301e LP |
1086 | return 0; |
1087 | ||
1088 | if (interface && (!m->interface || !streq(m->interface, interface))) | |
1089 | return 0; | |
1090 | ||
1091 | if (member && (!m->member || !streq(m->member, member))) | |
1092 | return 0; | |
1093 | ||
1094 | return 1; | |
1095 | } | |
1096 | ||
2ac7c17f LP |
1097 | _public_ int sd_bus_message_is_method_call( |
1098 | sd_bus_message *m, | |
1099 | const char *interface, | |
1100 | const char *member) { | |
1101 | ||
9d6c7c82 | 1102 | assert_return(m, -EINVAL); |
de1c301e | 1103 | |
40ca29a1 | 1104 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
de1c301e LP |
1105 | return 0; |
1106 | ||
1107 | if (interface && (!m->interface || !streq(m->interface, interface))) | |
1108 | return 0; | |
1109 | ||
1110 | if (member && (!m->member || !streq(m->member, member))) | |
1111 | return 0; | |
1112 | ||
1113 | return 1; | |
1114 | } | |
1115 | ||
d9f644e2 | 1116 | _public_ int sd_bus_message_is_method_error(sd_bus_message *m, const char *name) { |
9d6c7c82 | 1117 | assert_return(m, -EINVAL); |
de1c301e | 1118 | |
40ca29a1 | 1119 | if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) |
de1c301e LP |
1120 | return 0; |
1121 | ||
1122 | if (name && (!m->error.name || !streq(m->error.name, name))) | |
1123 | return 0; | |
1124 | ||
1125 | return 1; | |
1126 | } | |
1127 | ||
eee9ec0e | 1128 | _public_ int sd_bus_message_set_expect_reply(sd_bus_message *m, int b) { |
9d6c7c82 LP |
1129 | assert_return(m, -EINVAL); |
1130 | assert_return(!m->sealed, -EPERM); | |
1131 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EPERM); | |
de1c301e | 1132 | |
5883ff60 | 1133 | SET_FLAG(m->header->flags, BUS_MESSAGE_NO_REPLY_EXPECTED, !b); |
de1c301e LP |
1134 | |
1135 | return 0; | |
1136 | } | |
1137 | ||
eee9ec0e | 1138 | _public_ int sd_bus_message_set_auto_start(sd_bus_message *m, int b) { |
1fee9de5 LP |
1139 | assert_return(m, -EINVAL); |
1140 | assert_return(!m->sealed, -EPERM); | |
1141 | ||
5883ff60 | 1142 | SET_FLAG(m->header->flags, BUS_MESSAGE_NO_AUTO_START, !b); |
1fee9de5 LP |
1143 | |
1144 | return 0; | |
1145 | } | |
1146 | ||
53a83f4b LP |
1147 | _public_ int sd_bus_message_set_allow_interactive_authorization(sd_bus_message *m, int b) { |
1148 | assert_return(m, -EINVAL); | |
1149 | assert_return(!m->sealed, -EPERM); | |
1150 | ||
5883ff60 | 1151 | SET_FLAG(m->header->flags, BUS_MESSAGE_ALLOW_INTERACTIVE_AUTHORIZATION, b); |
53a83f4b LP |
1152 | |
1153 | return 0; | |
1154 | } | |
1155 | ||
de1c301e LP |
1156 | static struct bus_container *message_get_container(sd_bus_message *m) { |
1157 | assert(m); | |
1158 | ||
1159 | if (m->n_containers == 0) | |
1160 | return &m->root_container; | |
1161 | ||
9a17484d LP |
1162 | assert(m->containers); |
1163 | return m->containers + m->n_containers - 1; | |
de1c301e LP |
1164 | } |
1165 | ||
bc7fd8cd LP |
1166 | struct bus_body_part *message_append_part(sd_bus_message *m) { |
1167 | struct bus_body_part *part; | |
1168 | ||
1169 | assert(m); | |
35460afc LP |
1170 | |
1171 | if (m->poisoned) | |
1172 | return NULL; | |
bc7fd8cd LP |
1173 | |
1174 | if (m->n_body_parts <= 0) { | |
1175 | part = &m->body; | |
1176 | zero(*part); | |
1177 | } else { | |
1178 | assert(m->body_end); | |
1179 | ||
1180 | part = new0(struct bus_body_part, 1); | |
1181 | if (!part) { | |
1182 | m->poisoned = true; | |
1183 | return NULL; | |
1184 | } | |
1185 | ||
1186 | m->body_end->next = part; | |
1187 | } | |
1188 | ||
1189 | part->memfd = -1; | |
1190 | m->body_end = part; | |
313cefa1 | 1191 | m->n_body_parts++; |
bc7fd8cd LP |
1192 | |
1193 | return part; | |
1194 | } | |
1195 | ||
1196 | static void part_zero(struct bus_body_part *part, size_t sz) { | |
1197 | assert(part); | |
1198 | assert(sz > 0); | |
1199 | assert(sz < 8); | |
1200 | ||
453a0c29 LP |
1201 | /* All other fields can be left in their defaults */ |
1202 | assert(!part->data); | |
1203 | assert(part->memfd < 0); | |
1204 | ||
bc7fd8cd | 1205 | part->size = sz; |
453a0c29 LP |
1206 | part->is_zero = true; |
1207 | part->sealed = true; | |
bc7fd8cd LP |
1208 | } |
1209 | ||
1210 | static int part_make_space( | |
1211 | struct sd_bus_message *m, | |
1212 | struct bus_body_part *part, | |
1213 | size_t sz, | |
1214 | void **q) { | |
1215 | ||
1216 | void *n; | |
bc7fd8cd LP |
1217 | |
1218 | assert(m); | |
1219 | assert(part); | |
1220 | assert(!part->sealed); | |
1221 | ||
1222 | if (m->poisoned) | |
1223 | return -ENOMEM; | |
1224 | ||
a132bef0 ZJS |
1225 | if (part->allocated == 0 || sz > part->allocated) { |
1226 | size_t new_allocated; | |
bc7fd8cd | 1227 | |
a132bef0 ZJS |
1228 | new_allocated = sz > 0 ? 2 * sz : 64; |
1229 | n = realloc(part->data, new_allocated); | |
1230 | if (!n) { | |
1231 | m->poisoned = true; | |
1232 | return -ENOMEM; | |
bc7fd8cd | 1233 | } |
bf30e48f | 1234 | |
a132bef0 ZJS |
1235 | part->data = n; |
1236 | part->allocated = new_allocated; | |
1237 | part->free_this = true; | |
bc7fd8cd LP |
1238 | } |
1239 | ||
1240 | if (q) | |
1241 | *q = part->data ? (uint8_t*) part->data + part->size : NULL; | |
1242 | ||
1243 | part->size = sz; | |
1244 | return 0; | |
1245 | } | |
1246 | ||
c1b9d935 LP |
1247 | static int message_add_offset(sd_bus_message *m, size_t offset) { |
1248 | struct bus_container *c; | |
1249 | ||
1250 | assert(m); | |
6647dc66 | 1251 | assert(BUS_MESSAGE_IS_GVARIANT(m)); |
c1b9d935 LP |
1252 | |
1253 | /* Add offset to current container, unless this is the first | |
1254 | * item in it, which will have the 0 offset, which we can | |
1255 | * ignore. */ | |
1256 | c = message_get_container(m); | |
1257 | ||
1258 | if (!c->need_offsets) | |
1259 | return 0; | |
1260 | ||
306f07be | 1261 | if (!GREEDY_REALLOC(c->offsets, c->offsets_allocated, c->n_offsets + 1)) |
c1b9d935 LP |
1262 | return -ENOMEM; |
1263 | ||
1264 | c->offsets[c->n_offsets++] = offset; | |
1265 | return 0; | |
1266 | } | |
1267 | ||
453a0c29 | 1268 | static void message_extend_containers(sd_bus_message *m, size_t expand) { |
de1c301e | 1269 | struct bus_container *c; |
453a0c29 LP |
1270 | |
1271 | assert(m); | |
1272 | ||
1273 | if (expand <= 0) | |
1274 | return; | |
1275 | ||
1276 | /* Update counters */ | |
c1b9d935 LP |
1277 | for (c = m->containers; c < m->containers + m->n_containers; c++) { |
1278 | ||
453a0c29 LP |
1279 | if (c->array_size) |
1280 | *c->array_size += expand; | |
c1b9d935 | 1281 | } |
453a0c29 LP |
1282 | } |
1283 | ||
2ac7c17f LP |
1284 | static void *message_extend_body( |
1285 | sd_bus_message *m, | |
1286 | size_t align, | |
1287 | size_t sz, | |
1288 | bool add_offset, | |
1289 | bool force_inline) { | |
1290 | ||
f3097697 | 1291 | size_t start_body, end_body, padding, added; |
bc7fd8cd LP |
1292 | void *p; |
1293 | int r; | |
de1c301e LP |
1294 | |
1295 | assert(m); | |
9a17484d | 1296 | assert(align > 0); |
bc7fd8cd | 1297 | assert(!m->sealed); |
35460afc LP |
1298 | |
1299 | if (m->poisoned) | |
1300 | return NULL; | |
de1c301e | 1301 | |
2ac7c17f | 1302 | start_body = ALIGN_TO((size_t) m->body_size, align); |
bc7fd8cd LP |
1303 | end_body = start_body + sz; |
1304 | ||
2ac7c17f | 1305 | padding = start_body - m->body_size; |
bc7fd8cd LP |
1306 | added = padding + sz; |
1307 | ||
1308 | /* Check for 32bit overflows */ | |
2ac7c17f LP |
1309 | if (end_body > (size_t) ((uint32_t) -1) || |
1310 | end_body < start_body) { | |
bc7fd8cd | 1311 | m->poisoned = true; |
de1c301e | 1312 | return NULL; |
bc7fd8cd | 1313 | } |
de1c301e | 1314 | |
f3097697 LP |
1315 | if (added > 0) { |
1316 | struct bus_body_part *part = NULL; | |
1317 | bool add_new_part; | |
1318 | ||
1319 | add_new_part = | |
1320 | m->n_body_parts <= 0 || | |
1321 | m->body_end->sealed || | |
2ac7c17f | 1322 | (padding != ALIGN_TO(m->body_end->size, align) - m->body_end->size) || |
0241c1c0 ZJS |
1323 | (force_inline && m->body_end->size > MEMFD_MIN_SIZE); |
1324 | /* If this must be an inlined extension, let's create a new part if | |
1325 | * the previous part is large enough to be inlined. */ | |
f3097697 LP |
1326 | |
1327 | if (add_new_part) { | |
1328 | if (padding > 0) { | |
1329 | part = message_append_part(m); | |
1330 | if (!part) | |
1331 | return NULL; | |
1332 | ||
1333 | part_zero(part, padding); | |
1334 | } | |
de1c301e | 1335 | |
bc7fd8cd LP |
1336 | part = message_append_part(m); |
1337 | if (!part) | |
1338 | return NULL; | |
1339 | ||
f3097697 LP |
1340 | r = part_make_space(m, part, sz, &p); |
1341 | if (r < 0) | |
1342 | return NULL; | |
1343 | } else { | |
1344 | struct bus_container *c; | |
1345 | void *op; | |
1346 | size_t os, start_part, end_part; | |
bc7fd8cd | 1347 | |
f3097697 LP |
1348 | part = m->body_end; |
1349 | op = part->data; | |
1350 | os = part->size; | |
bc7fd8cd | 1351 | |
f3097697 LP |
1352 | start_part = ALIGN_TO(part->size, align); |
1353 | end_part = start_part + sz; | |
bc7fd8cd | 1354 | |
f3097697 LP |
1355 | r = part_make_space(m, part, end_part, &p); |
1356 | if (r < 0) | |
1357 | return NULL; | |
bc7fd8cd | 1358 | |
f3097697 | 1359 | if (padding > 0) { |
29804cc1 | 1360 | memzero(p, padding); |
f3097697 LP |
1361 | p = (uint8_t*) p + padding; |
1362 | } | |
bc7fd8cd | 1363 | |
f3097697 LP |
1364 | /* Readjust pointers */ |
1365 | for (c = m->containers; c < m->containers + m->n_containers; c++) | |
1366 | c->array_size = adjust_pointer(c->array_size, op, os, part->data); | |
bc7fd8cd | 1367 | |
f3097697 | 1368 | m->error.message = (const char*) adjust_pointer(m->error.message, op, os, part->data); |
de1c301e | 1369 | } |
f3097697 LP |
1370 | } else |
1371 | /* Return something that is not NULL and is aligned */ | |
0241c1c0 | 1372 | p = (uint8_t*) align; |
de1c301e | 1373 | |
2ac7c17f | 1374 | m->body_size = end_body; |
453a0c29 | 1375 | message_extend_containers(m, added); |
de1c301e | 1376 | |
c1b9d935 LP |
1377 | if (add_offset) { |
1378 | r = message_add_offset(m, end_body); | |
1379 | if (r < 0) { | |
1380 | m->poisoned = true; | |
1381 | return NULL; | |
1382 | } | |
1383 | } | |
1384 | ||
de1c301e LP |
1385 | return p; |
1386 | } | |
1387 | ||
c1b9d935 LP |
1388 | static int message_push_fd(sd_bus_message *m, int fd) { |
1389 | int *f, copy; | |
1390 | ||
1391 | assert(m); | |
1392 | ||
1393 | if (fd < 0) | |
1394 | return -EINVAL; | |
1395 | ||
1396 | if (!m->allow_fds) | |
15411c0c | 1397 | return -EOPNOTSUPP; |
c1b9d935 LP |
1398 | |
1399 | copy = fcntl(fd, F_DUPFD_CLOEXEC, 3); | |
1400 | if (copy < 0) | |
1401 | return -errno; | |
1402 | ||
1403 | f = realloc(m->fds, sizeof(int) * (m->n_fds + 1)); | |
1404 | if (!f) { | |
1405 | m->poisoned = true; | |
03e334a1 | 1406 | safe_close(copy); |
c1b9d935 LP |
1407 | return -ENOMEM; |
1408 | } | |
1409 | ||
1410 | m->fds = f; | |
1411 | m->fds[m->n_fds] = copy; | |
1412 | m->free_fds = true; | |
1413 | ||
1414 | return copy; | |
1415 | } | |
1416 | ||
de1c301e | 1417 | int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored) { |
c1b9d935 | 1418 | _cleanup_close_ int fd = -1; |
de1c301e | 1419 | struct bus_container *c; |
27f6e5c7 | 1420 | ssize_t align, sz; |
de1c301e | 1421 | void *a; |
de1c301e | 1422 | |
9d6c7c82 | 1423 | assert_return(m, -EINVAL); |
9d6c7c82 LP |
1424 | assert_return(!m->sealed, -EPERM); |
1425 | assert_return(bus_type_is_basic(type), -EINVAL); | |
1426 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
1427 | |
1428 | c = message_get_container(m); | |
1429 | ||
1430 | if (c->signature && c->signature[c->index]) { | |
1431 | /* Container signature is already set */ | |
1432 | ||
1433 | if (c->signature[c->index] != type) | |
9a17484d | 1434 | return -ENXIO; |
de1c301e | 1435 | } else { |
5cbe7492 LP |
1436 | char *e; |
1437 | ||
ad67ef27 | 1438 | /* Maybe we can append to the signature? But only if this is the top-level container */ |
de1c301e | 1439 | if (c->enclosing != 0) |
9a17484d | 1440 | return -ENXIO; |
de1c301e LP |
1441 | |
1442 | e = strextend(&c->signature, CHAR_TO_STR(type), NULL); | |
bc7fd8cd LP |
1443 | if (!e) { |
1444 | m->poisoned = true; | |
de1c301e | 1445 | return -ENOMEM; |
bc7fd8cd | 1446 | } |
de1c301e LP |
1447 | } |
1448 | ||
6647dc66 | 1449 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 LP |
1450 | uint8_t u8; |
1451 | uint32_t u32; | |
de1c301e | 1452 | |
c1b9d935 | 1453 | switch (type) { |
cd6f997f | 1454 | |
c1b9d935 LP |
1455 | case SD_BUS_TYPE_SIGNATURE: |
1456 | case SD_BUS_TYPE_STRING: | |
1457 | p = strempty(p); | |
b8beb278 | 1458 | |
4831981d | 1459 | _fallthrough_; |
c1b9d935 LP |
1460 | case SD_BUS_TYPE_OBJECT_PATH: |
1461 | if (!p) | |
1462 | return -EINVAL; | |
cd6f997f | 1463 | |
c1b9d935 LP |
1464 | align = 1; |
1465 | sz = strlen(p) + 1; | |
1466 | break; | |
de1c301e | 1467 | |
c1b9d935 | 1468 | case SD_BUS_TYPE_BOOLEAN: |
b8beb278 | 1469 | |
c1b9d935 LP |
1470 | u8 = p && *(int*) p; |
1471 | p = &u8; | |
cd6f997f | 1472 | |
c1b9d935 LP |
1473 | align = sz = 1; |
1474 | break; | |
de1c301e | 1475 | |
c1b9d935 | 1476 | case SD_BUS_TYPE_UNIX_FD: |
b3273daf | 1477 | |
c1b9d935 LP |
1478 | if (!p) |
1479 | return -EINVAL; | |
15912917 | 1480 | |
c1b9d935 LP |
1481 | fd = message_push_fd(m, *(int*) p); |
1482 | if (fd < 0) | |
1483 | return fd; | |
de1c301e | 1484 | |
c1b9d935 LP |
1485 | u32 = m->n_fds; |
1486 | p = &u32; | |
de1c301e | 1487 | |
c1b9d935 LP |
1488 | align = sz = 4; |
1489 | break; | |
2c93b4ef | 1490 | |
c1b9d935 LP |
1491 | default: |
1492 | align = bus_gvariant_get_alignment(CHAR_TO_STR(type)); | |
6647dc66 | 1493 | sz = bus_gvariant_get_size(CHAR_TO_STR(type)); |
c1b9d935 | 1494 | break; |
15912917 KS |
1495 | } |
1496 | ||
c1b9d935 LP |
1497 | assert(align > 0); |
1498 | assert(sz > 0); | |
2c93b4ef | 1499 | |
2ac7c17f | 1500 | a = message_extend_body(m, align, sz, true, false); |
c1b9d935 LP |
1501 | if (!a) |
1502 | return -ENOMEM; | |
2c93b4ef | 1503 | |
c1b9d935 | 1504 | memcpy(a, p, sz); |
2c93b4ef | 1505 | |
c1b9d935 LP |
1506 | if (stored) |
1507 | *stored = (const uint8_t*) a; | |
2c93b4ef | 1508 | |
c1b9d935 LP |
1509 | } else { |
1510 | uint32_t u32; | |
2c93b4ef | 1511 | |
c1b9d935 | 1512 | switch (type) { |
2c93b4ef | 1513 | |
c1b9d935 LP |
1514 | case SD_BUS_TYPE_STRING: |
1515 | /* To make things easy we'll serialize a NULL string | |
1516 | * into the empty string */ | |
1517 | p = strempty(p); | |
b3273daf | 1518 | |
4831981d | 1519 | _fallthrough_; |
c1b9d935 | 1520 | case SD_BUS_TYPE_OBJECT_PATH: |
de1c301e | 1521 | |
c1b9d935 LP |
1522 | if (!p) |
1523 | return -EINVAL; | |
de1c301e | 1524 | |
c1b9d935 LP |
1525 | align = 4; |
1526 | sz = 4 + strlen(p) + 1; | |
1527 | break; | |
de1c301e | 1528 | |
c1b9d935 | 1529 | case SD_BUS_TYPE_SIGNATURE: |
de1c301e | 1530 | |
c1b9d935 | 1531 | p = strempty(p); |
de1c301e | 1532 | |
c1b9d935 LP |
1533 | align = 1; |
1534 | sz = 1 + strlen(p) + 1; | |
1535 | break; | |
de1c301e | 1536 | |
c1b9d935 | 1537 | case SD_BUS_TYPE_BOOLEAN: |
2c93b4ef | 1538 | |
c1b9d935 | 1539 | u32 = p && *(int*) p; |
6647dc66 LP |
1540 | p = &u32; |
1541 | ||
c1b9d935 LP |
1542 | align = sz = 4; |
1543 | break; | |
2c93b4ef | 1544 | |
c1b9d935 | 1545 | case SD_BUS_TYPE_UNIX_FD: |
de1c301e | 1546 | |
c1b9d935 LP |
1547 | if (!p) |
1548 | return -EINVAL; | |
de1c301e | 1549 | |
c1b9d935 LP |
1550 | fd = message_push_fd(m, *(int*) p); |
1551 | if (fd < 0) | |
1552 | return fd; | |
1553 | ||
1554 | u32 = m->n_fds; | |
1555 | p = &u32; | |
1556 | ||
1557 | align = sz = 4; | |
1558 | break; | |
1559 | ||
1560 | default: | |
1561 | align = bus_type_get_alignment(type); | |
1562 | sz = bus_type_get_size(type); | |
1563 | break; | |
1564 | } | |
1565 | ||
1566 | assert(align > 0); | |
1567 | assert(sz > 0); | |
1568 | ||
2ac7c17f | 1569 | a = message_extend_body(m, align, sz, false, false); |
c1b9d935 LP |
1570 | if (!a) |
1571 | return -ENOMEM; | |
1572 | ||
945c2931 | 1573 | if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH)) { |
c1b9d935 LP |
1574 | *(uint32_t*) a = sz - 5; |
1575 | memcpy((uint8_t*) a + 4, p, sz - 4); | |
1576 | ||
1577 | if (stored) | |
1578 | *stored = (const uint8_t*) a + 4; | |
1579 | ||
1580 | } else if (type == SD_BUS_TYPE_SIGNATURE) { | |
ec260edc | 1581 | *(uint8_t*) a = sz - 2; |
c1b9d935 LP |
1582 | memcpy((uint8_t*) a + 1, p, sz - 1); |
1583 | ||
1584 | if (stored) | |
1585 | *stored = (const uint8_t*) a + 1; | |
1586 | } else { | |
1587 | memcpy(a, p, sz); | |
1588 | ||
1589 | if (stored) | |
1590 | *stored = a; | |
1591 | } | |
de1c301e LP |
1592 | } |
1593 | ||
c1b9d935 | 1594 | if (type == SD_BUS_TYPE_UNIX_FD) |
313cefa1 | 1595 | m->n_fds++; |
c1b9d935 | 1596 | |
de1c301e | 1597 | if (c->enclosing != SD_BUS_TYPE_ARRAY) |
9a17484d | 1598 | c->index++; |
de1c301e | 1599 | |
c1b9d935 | 1600 | fd = -1; |
de1c301e LP |
1601 | return 0; |
1602 | } | |
1603 | ||
d9f644e2 | 1604 | _public_ int sd_bus_message_append_basic(sd_bus_message *m, char type, const void *p) { |
de1c301e LP |
1605 | return message_append_basic(m, type, p, NULL); |
1606 | } | |
1607 | ||
938bcbab LP |
1608 | _public_ int sd_bus_message_append_string_space( |
1609 | sd_bus_message *m, | |
1610 | size_t size, | |
1611 | char **s) { | |
1612 | ||
f8e013f8 | 1613 | struct bus_container *c; |
f8e013f8 | 1614 | void *a; |
f8e013f8 | 1615 | |
9d6c7c82 LP |
1616 | assert_return(m, -EINVAL); |
1617 | assert_return(s, -EINVAL); | |
1618 | assert_return(!m->sealed, -EPERM); | |
1619 | assert_return(!m->poisoned, -ESTALE); | |
f8e013f8 LP |
1620 | |
1621 | c = message_get_container(m); | |
1622 | ||
1623 | if (c->signature && c->signature[c->index]) { | |
1624 | /* Container signature is already set */ | |
1625 | ||
1626 | if (c->signature[c->index] != SD_BUS_TYPE_STRING) | |
1627 | return -ENXIO; | |
1628 | } else { | |
5cbe7492 LP |
1629 | char *e; |
1630 | ||
ad67ef27 | 1631 | /* Maybe we can append to the signature? But only if this is the top-level container */ |
f8e013f8 LP |
1632 | if (c->enclosing != 0) |
1633 | return -ENXIO; | |
1634 | ||
1635 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL); | |
bc7fd8cd LP |
1636 | if (!e) { |
1637 | m->poisoned = true; | |
f8e013f8 | 1638 | return -ENOMEM; |
bc7fd8cd | 1639 | } |
f8e013f8 LP |
1640 | } |
1641 | ||
6647dc66 | 1642 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f | 1643 | a = message_extend_body(m, 1, size + 1, true, false); |
c1b9d935 LP |
1644 | if (!a) |
1645 | return -ENOMEM; | |
1646 | ||
1647 | *s = a; | |
1648 | } else { | |
2ac7c17f | 1649 | a = message_extend_body(m, 4, 4 + size + 1, false, false); |
c1b9d935 LP |
1650 | if (!a) |
1651 | return -ENOMEM; | |
f8e013f8 | 1652 | |
c1b9d935 LP |
1653 | *(uint32_t*) a = size; |
1654 | *s = (char*) a + 4; | |
1655 | } | |
f8e013f8 LP |
1656 | |
1657 | (*s)[size] = 0; | |
1658 | ||
1659 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1660 | c->index++; | |
1661 | ||
1662 | return 0; | |
f8e013f8 LP |
1663 | } |
1664 | ||
938bcbab LP |
1665 | _public_ int sd_bus_message_append_string_iovec( |
1666 | sd_bus_message *m, | |
1667 | const struct iovec *iov, | |
1668 | unsigned n) { | |
1669 | ||
1670 | size_t size; | |
1671 | unsigned i; | |
1672 | char *p; | |
1673 | int r; | |
1674 | ||
1675 | assert_return(m, -EINVAL); | |
1676 | assert_return(!m->sealed, -EPERM); | |
1677 | assert_return(iov || n == 0, -EINVAL); | |
1678 | assert_return(!m->poisoned, -ESTALE); | |
1679 | ||
1680 | size = IOVEC_TOTAL_SIZE(iov, n); | |
1681 | ||
1682 | r = sd_bus_message_append_string_space(m, size, &p); | |
1683 | if (r < 0) | |
1684 | return r; | |
1685 | ||
1686 | for (i = 0; i < n; i++) { | |
1687 | ||
1688 | if (iov[i].iov_base) | |
1689 | memcpy(p, iov[i].iov_base, iov[i].iov_len); | |
1690 | else | |
1691 | memset(p, ' ', iov[i].iov_len); | |
1692 | ||
1693 | p += iov[i].iov_len; | |
1694 | } | |
1695 | ||
1696 | return 0; | |
1697 | } | |
1698 | ||
de1c301e LP |
1699 | static int bus_message_open_array( |
1700 | sd_bus_message *m, | |
1701 | struct bus_container *c, | |
1702 | const char *contents, | |
c1b9d935 LP |
1703 | uint32_t **array_size, |
1704 | size_t *begin, | |
1705 | bool *need_offsets) { | |
de1c301e | 1706 | |
9a17484d | 1707 | unsigned nindex; |
c1b9d935 | 1708 | int alignment, r; |
de1c301e LP |
1709 | |
1710 | assert(m); | |
1711 | assert(c); | |
1712 | assert(contents); | |
1713 | assert(array_size); | |
c1b9d935 LP |
1714 | assert(begin); |
1715 | assert(need_offsets); | |
de1c301e | 1716 | |
29ddb38f | 1717 | if (!signature_is_single(contents, true)) |
de1c301e LP |
1718 | return -EINVAL; |
1719 | ||
de1c301e LP |
1720 | if (c->signature && c->signature[c->index]) { |
1721 | ||
1722 | /* Verify the existing signature */ | |
1723 | ||
1724 | if (c->signature[c->index] != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1725 | return -ENXIO; |
de1c301e LP |
1726 | |
1727 | if (!startswith(c->signature + c->index + 1, contents)) | |
9a17484d | 1728 | return -ENXIO; |
de1c301e LP |
1729 | |
1730 | nindex = c->index + 1 + strlen(contents); | |
1731 | } else { | |
5cbe7492 LP |
1732 | char *e; |
1733 | ||
de1c301e | 1734 | if (c->enclosing != 0) |
9a17484d | 1735 | return -ENXIO; |
de1c301e LP |
1736 | |
1737 | /* Extend the existing signature */ | |
1738 | ||
1739 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_ARRAY), contents, NULL); | |
bc7fd8cd LP |
1740 | if (!e) { |
1741 | m->poisoned = true; | |
de1c301e | 1742 | return -ENOMEM; |
bc7fd8cd | 1743 | } |
de1c301e LP |
1744 | |
1745 | nindex = e - c->signature; | |
1746 | } | |
1747 | ||
6647dc66 | 1748 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 LP |
1749 | alignment = bus_gvariant_get_alignment(contents); |
1750 | if (alignment < 0) | |
1751 | return alignment; | |
de1c301e | 1752 | |
c1b9d935 | 1753 | /* Add alignment padding and add to offset list */ |
2ac7c17f | 1754 | if (!message_extend_body(m, alignment, 0, false, false)) |
c1b9d935 | 1755 | return -ENOMEM; |
de1c301e | 1756 | |
c1b9d935 LP |
1757 | r = bus_gvariant_is_fixed_size(contents); |
1758 | if (r < 0) | |
1759 | return r; | |
1760 | ||
2ac7c17f | 1761 | *begin = m->body_size; |
c1b9d935 LP |
1762 | *need_offsets = r == 0; |
1763 | } else { | |
1764 | void *a, *op; | |
1765 | size_t os; | |
1766 | struct bus_body_part *o; | |
1767 | ||
1768 | alignment = bus_type_get_alignment(contents[0]); | |
1769 | if (alignment < 0) | |
1770 | return alignment; | |
1771 | ||
2ac7c17f | 1772 | a = message_extend_body(m, 4, 4, false, false); |
c1b9d935 LP |
1773 | if (!a) |
1774 | return -ENOMEM; | |
1775 | ||
1776 | o = m->body_end; | |
1777 | op = m->body_end->data; | |
1778 | os = m->body_end->size; | |
1779 | ||
1780 | /* Add alignment between size and first element */ | |
2ac7c17f | 1781 | if (!message_extend_body(m, alignment, 0, false, false)) |
c1b9d935 LP |
1782 | return -ENOMEM; |
1783 | ||
1784 | /* location of array size might have changed so let's readjust a */ | |
1785 | if (o == m->body_end) | |
1786 | a = adjust_pointer(a, op, os, m->body_end->data); | |
1787 | ||
1788 | *(uint32_t*) a = 0; | |
1789 | *array_size = a; | |
1790 | } | |
de1c301e LP |
1791 | |
1792 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1793 | c->index = nindex; | |
1794 | ||
de1c301e LP |
1795 | return 0; |
1796 | } | |
1797 | ||
1798 | static int bus_message_open_variant( | |
1799 | sd_bus_message *m, | |
1800 | struct bus_container *c, | |
1801 | const char *contents) { | |
1802 | ||
de1c301e LP |
1803 | assert(m); |
1804 | assert(c); | |
1805 | assert(contents); | |
1806 | ||
29ddb38f | 1807 | if (!signature_is_single(contents, false)) |
de1c301e LP |
1808 | return -EINVAL; |
1809 | ||
1810 | if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN) | |
1811 | return -EINVAL; | |
1812 | ||
1813 | if (c->signature && c->signature[c->index]) { | |
1814 | ||
1815 | if (c->signature[c->index] != SD_BUS_TYPE_VARIANT) | |
9a17484d | 1816 | return -ENXIO; |
de1c301e LP |
1817 | |
1818 | } else { | |
5cbe7492 LP |
1819 | char *e; |
1820 | ||
de1c301e | 1821 | if (c->enclosing != 0) |
9a17484d | 1822 | return -ENXIO; |
de1c301e LP |
1823 | |
1824 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_VARIANT), NULL); | |
bc7fd8cd LP |
1825 | if (!e) { |
1826 | m->poisoned = true; | |
de1c301e | 1827 | return -ENOMEM; |
bc7fd8cd | 1828 | } |
de1c301e LP |
1829 | } |
1830 | ||
6647dc66 | 1831 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 LP |
1832 | /* Variants are always aligned to 8 */ |
1833 | ||
2ac7c17f | 1834 | if (!message_extend_body(m, 8, 0, false, false)) |
c1b9d935 LP |
1835 | return -ENOMEM; |
1836 | ||
1837 | } else { | |
1838 | size_t l; | |
1839 | void *a; | |
de1c301e | 1840 | |
c1b9d935 | 1841 | l = strlen(contents); |
2ac7c17f | 1842 | a = message_extend_body(m, 1, 1 + l + 1, false, false); |
c1b9d935 LP |
1843 | if (!a) |
1844 | return -ENOMEM; | |
1845 | ||
1846 | *(uint8_t*) a = l; | |
1847 | memcpy((uint8_t*) a + 1, contents, l + 1); | |
1848 | } | |
de1c301e LP |
1849 | |
1850 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1851 | c->index++; |
de1c301e LP |
1852 | |
1853 | return 0; | |
1854 | } | |
1855 | ||
1856 | static int bus_message_open_struct( | |
1857 | sd_bus_message *m, | |
1858 | struct bus_container *c, | |
c1b9d935 LP |
1859 | const char *contents, |
1860 | size_t *begin, | |
1861 | bool *need_offsets) { | |
de1c301e LP |
1862 | |
1863 | size_t nindex; | |
c1b9d935 | 1864 | int r; |
de1c301e LP |
1865 | |
1866 | assert(m); | |
1867 | assert(c); | |
1868 | assert(contents); | |
c1b9d935 LP |
1869 | assert(begin); |
1870 | assert(need_offsets); | |
de1c301e LP |
1871 | |
1872 | if (!signature_is_valid(contents, false)) | |
1873 | return -EINVAL; | |
1874 | ||
1875 | if (c->signature && c->signature[c->index]) { | |
1876 | size_t l; | |
1877 | ||
1878 | l = strlen(contents); | |
1879 | ||
1880 | if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN || | |
1881 | !startswith(c->signature + c->index + 1, contents) || | |
1882 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END) | |
9a17484d | 1883 | return -ENXIO; |
de1c301e LP |
1884 | |
1885 | nindex = c->index + 1 + l + 1; | |
1886 | } else { | |
5cbe7492 LP |
1887 | char *e; |
1888 | ||
de1c301e | 1889 | if (c->enclosing != 0) |
9a17484d | 1890 | return -ENXIO; |
de1c301e LP |
1891 | |
1892 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_BEGIN), contents, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_END), NULL); | |
bc7fd8cd LP |
1893 | if (!e) { |
1894 | m->poisoned = true; | |
de1c301e | 1895 | return -ENOMEM; |
bc7fd8cd | 1896 | } |
de1c301e LP |
1897 | |
1898 | nindex = e - c->signature; | |
1899 | } | |
1900 | ||
6647dc66 | 1901 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 LP |
1902 | int alignment; |
1903 | ||
1904 | alignment = bus_gvariant_get_alignment(contents); | |
1905 | if (alignment < 0) | |
1906 | return alignment; | |
1907 | ||
2ac7c17f | 1908 | if (!message_extend_body(m, alignment, 0, false, false)) |
c1b9d935 LP |
1909 | return -ENOMEM; |
1910 | ||
1911 | r = bus_gvariant_is_fixed_size(contents); | |
1912 | if (r < 0) | |
1913 | return r; | |
1914 | ||
2ac7c17f | 1915 | *begin = m->body_size; |
c1b9d935 LP |
1916 | *need_offsets = r == 0; |
1917 | } else { | |
1918 | /* Align contents to 8 byte boundary */ | |
2ac7c17f | 1919 | if (!message_extend_body(m, 8, 0, false, false)) |
c1b9d935 LP |
1920 | return -ENOMEM; |
1921 | } | |
de1c301e LP |
1922 | |
1923 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1924 | c->index = nindex; | |
1925 | ||
1926 | return 0; | |
1927 | } | |
1928 | ||
1929 | static int bus_message_open_dict_entry( | |
1930 | sd_bus_message *m, | |
1931 | struct bus_container *c, | |
c1b9d935 LP |
1932 | const char *contents, |
1933 | size_t *begin, | |
1934 | bool *need_offsets) { | |
de1c301e | 1935 | |
c1b9d935 | 1936 | int r; |
de1c301e LP |
1937 | |
1938 | assert(m); | |
1939 | assert(c); | |
1940 | assert(contents); | |
c1b9d935 LP |
1941 | assert(begin); |
1942 | assert(need_offsets); | |
de1c301e LP |
1943 | |
1944 | if (!signature_is_pair(contents)) | |
1945 | return -EINVAL; | |
1946 | ||
1947 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1948 | return -ENXIO; |
de1c301e LP |
1949 | |
1950 | if (c->signature && c->signature[c->index]) { | |
1951 | size_t l; | |
1952 | ||
1953 | l = strlen(contents); | |
1954 | ||
1955 | if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN || | |
1956 | !startswith(c->signature + c->index + 1, contents) || | |
1957 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END) | |
9a17484d | 1958 | return -ENXIO; |
de1c301e | 1959 | } else |
9a17484d | 1960 | return -ENXIO; |
de1c301e | 1961 | |
6647dc66 | 1962 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 | 1963 | int alignment; |
de1c301e | 1964 | |
c1b9d935 LP |
1965 | alignment = bus_gvariant_get_alignment(contents); |
1966 | if (alignment < 0) | |
1967 | return alignment; | |
1968 | ||
2ac7c17f | 1969 | if (!message_extend_body(m, alignment, 0, false, false)) |
c1b9d935 LP |
1970 | return -ENOMEM; |
1971 | ||
1972 | r = bus_gvariant_is_fixed_size(contents); | |
1973 | if (r < 0) | |
1974 | return r; | |
1975 | ||
2ac7c17f | 1976 | *begin = m->body_size; |
c1b9d935 LP |
1977 | *need_offsets = r == 0; |
1978 | } else { | |
1979 | /* Align contents to 8 byte boundary */ | |
2ac7c17f | 1980 | if (!message_extend_body(m, 8, 0, false, false)) |
c1b9d935 LP |
1981 | return -ENOMEM; |
1982 | } | |
de1c301e LP |
1983 | |
1984 | return 0; | |
1985 | } | |
1986 | ||
d9f644e2 | 1987 | _public_ int sd_bus_message_open_container( |
de1c301e LP |
1988 | sd_bus_message *m, |
1989 | char type, | |
1990 | const char *contents) { | |
1991 | ||
9a17484d | 1992 | struct bus_container *c, *w; |
de1c301e | 1993 | uint32_t *array_size = NULL; |
9a17484d | 1994 | char *signature; |
39883f62 | 1995 | size_t before, begin = 0; |
c1b9d935 | 1996 | bool need_offsets = false; |
de1c301e LP |
1997 | int r; |
1998 | ||
9d6c7c82 LP |
1999 | assert_return(m, -EINVAL); |
2000 | assert_return(!m->sealed, -EPERM); | |
2001 | assert_return(contents, -EINVAL); | |
2002 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
2003 | |
2004 | /* Make sure we have space for one more container */ | |
306f07be | 2005 | if (!GREEDY_REALLOC(m->containers, m->containers_allocated, m->n_containers + 1)) { |
bc7fd8cd | 2006 | m->poisoned = true; |
de1c301e | 2007 | return -ENOMEM; |
bc7fd8cd LP |
2008 | } |
2009 | ||
de1c301e LP |
2010 | c = message_get_container(m); |
2011 | ||
2012 | signature = strdup(contents); | |
bc7fd8cd LP |
2013 | if (!signature) { |
2014 | m->poisoned = true; | |
de1c301e | 2015 | return -ENOMEM; |
bc7fd8cd | 2016 | } |
de1c301e | 2017 | |
b3af9646 LP |
2018 | /* Save old index in the parent container, in case we have to |
2019 | * abort this container */ | |
2020 | c->saved_index = c->index; | |
2ac7c17f | 2021 | before = m->body_size; |
b3af9646 | 2022 | |
de1c301e | 2023 | if (type == SD_BUS_TYPE_ARRAY) |
c1b9d935 | 2024 | r = bus_message_open_array(m, c, contents, &array_size, &begin, &need_offsets); |
de1c301e LP |
2025 | else if (type == SD_BUS_TYPE_VARIANT) |
2026 | r = bus_message_open_variant(m, c, contents); | |
2027 | else if (type == SD_BUS_TYPE_STRUCT) | |
c1b9d935 | 2028 | r = bus_message_open_struct(m, c, contents, &begin, &need_offsets); |
de1c301e | 2029 | else if (type == SD_BUS_TYPE_DICT_ENTRY) |
c1b9d935 | 2030 | r = bus_message_open_dict_entry(m, c, contents, &begin, &need_offsets); |
de1c301e LP |
2031 | else |
2032 | r = -EINVAL; | |
2033 | ||
2034 | if (r < 0) { | |
2035 | free(signature); | |
2036 | return r; | |
2037 | } | |
2038 | ||
2039 | /* OK, let's fill it in */ | |
306f07be | 2040 | w = m->containers + m->n_containers++; |
9a17484d LP |
2041 | w->enclosing = type; |
2042 | w->signature = signature; | |
2043 | w->index = 0; | |
2044 | w->array_size = array_size; | |
b3af9646 | 2045 | w->before = before; |
c1b9d935 | 2046 | w->begin = begin; |
306f07be | 2047 | w->n_offsets = w->offsets_allocated = 0; |
c1b9d935 LP |
2048 | w->offsets = NULL; |
2049 | w->need_offsets = need_offsets; | |
2050 | ||
2051 | return 0; | |
2052 | } | |
2053 | ||
2054 | static int bus_message_close_array(sd_bus_message *m, struct bus_container *c) { | |
2055 | ||
2056 | assert(m); | |
2057 | assert(c); | |
2058 | ||
6647dc66 | 2059 | if (!BUS_MESSAGE_IS_GVARIANT(m)) |
c1b9d935 LP |
2060 | return 0; |
2061 | ||
2062 | if (c->need_offsets) { | |
6647dc66 | 2063 | size_t payload, sz, i; |
c1b9d935 | 2064 | uint8_t *a; |
c1b9d935 LP |
2065 | |
2066 | /* Variable-width arrays */ | |
2067 | ||
6647dc66 | 2068 | payload = c->n_offsets > 0 ? c->offsets[c->n_offsets-1] - c->begin : 0; |
2ac7c17f | 2069 | sz = bus_gvariant_determine_word_size(payload, c->n_offsets); |
c1b9d935 | 2070 | |
2ac7c17f | 2071 | a = message_extend_body(m, 1, sz * c->n_offsets, true, false); |
6647dc66 LP |
2072 | if (!a) |
2073 | return -ENOMEM; | |
c1b9d935 | 2074 | |
6647dc66 | 2075 | for (i = 0; i < c->n_offsets; i++) |
2ac7c17f | 2076 | bus_gvariant_write_word_le(a + sz*i, sz, c->offsets[i] - c->begin); |
c1b9d935 LP |
2077 | } else { |
2078 | void *a; | |
2079 | ||
2080 | /* Fixed-width or empty arrays */ | |
2081 | ||
2ac7c17f | 2082 | a = message_extend_body(m, 1, 0, true, false); /* let's add offset to parent */ |
c1b9d935 LP |
2083 | if (!a) |
2084 | return -ENOMEM; | |
2085 | } | |
2086 | ||
2087 | return 0; | |
2088 | } | |
2089 | ||
2090 | static int bus_message_close_variant(sd_bus_message *m, struct bus_container *c) { | |
2091 | uint8_t *a; | |
2092 | size_t l; | |
2093 | ||
2094 | assert(m); | |
2095 | assert(c); | |
3e49a3a0 | 2096 | assert(c->signature); |
c1b9d935 | 2097 | |
6647dc66 | 2098 | if (!BUS_MESSAGE_IS_GVARIANT(m)) |
c1b9d935 LP |
2099 | return 0; |
2100 | ||
2101 | l = strlen(c->signature); | |
2102 | ||
2ac7c17f | 2103 | a = message_extend_body(m, 1, 1 + l, true, false); |
c1b9d935 LP |
2104 | if (!a) |
2105 | return -ENOMEM; | |
2106 | ||
2107 | a[0] = 0; | |
2108 | memcpy(a+1, c->signature, l); | |
2109 | ||
2110 | return 0; | |
2111 | } | |
2112 | ||
2113 | static int bus_message_close_struct(sd_bus_message *m, struct bus_container *c, bool add_offset) { | |
443a5598 | 2114 | bool fixed_size = true; |
c1b9d935 LP |
2115 | size_t n_variable = 0; |
2116 | unsigned i = 0; | |
2117 | const char *p; | |
2118 | uint8_t *a; | |
2119 | int r; | |
2120 | ||
2121 | assert(m); | |
2122 | assert(c); | |
2123 | ||
6647dc66 | 2124 | if (!BUS_MESSAGE_IS_GVARIANT(m)) |
c1b9d935 LP |
2125 | return 0; |
2126 | ||
d6385068 | 2127 | p = strempty(c->signature); |
c1b9d935 LP |
2128 | while (*p != 0) { |
2129 | size_t n; | |
2130 | ||
2131 | r = signature_element_length(p, &n); | |
2132 | if (r < 0) | |
2133 | return r; | |
2134 | else { | |
2135 | char t[n+1]; | |
2136 | ||
2137 | memcpy(t, p, n); | |
2138 | t[n] = 0; | |
2139 | ||
2140 | r = bus_gvariant_is_fixed_size(t); | |
2141 | if (r < 0) | |
2142 | return r; | |
2143 | } | |
2144 | ||
8f19720d | 2145 | assert(!c->need_offsets || i <= c->n_offsets); |
c1b9d935 LP |
2146 | |
2147 | /* We need to add an offset for each item that has a | |
2148 | * variable size and that is not the last one in the | |
2149 | * list */ | |
443a5598 DH |
2150 | if (r == 0) |
2151 | fixed_size = false; | |
c1b9d935 LP |
2152 | if (r == 0 && p[n] != 0) |
2153 | n_variable++; | |
c1b9d935 LP |
2154 | |
2155 | i++; | |
2156 | p += n; | |
2157 | } | |
2158 | ||
8f19720d LP |
2159 | assert(!c->need_offsets || i == c->n_offsets); |
2160 | assert(c->need_offsets || n_variable == 0); | |
6647dc66 | 2161 | |
e53d21d0 DH |
2162 | if (isempty(c->signature)) { |
2163 | /* The unary type is encoded as fixed 1 byte padding */ | |
2164 | a = message_extend_body(m, 1, 1, add_offset, false); | |
2165 | if (!a) | |
2166 | return -ENOMEM; | |
2167 | ||
2168 | *a = 0; | |
2169 | } else if (n_variable <= 0) { | |
443a5598 DH |
2170 | int alignment = 1; |
2171 | ||
2172 | /* Structures with fixed-size members only have to be | |
2173 | * fixed-size themselves. But gvariant requires all fixed-size | |
2174 | * elements to be sized a multiple of their alignment. Hence, | |
2175 | * we must *always* add final padding after the last member so | |
2176 | * the overall size of the structure is properly aligned. */ | |
2177 | if (fixed_size) | |
2178 | alignment = bus_gvariant_get_alignment(strempty(c->signature)); | |
2179 | ||
2180 | assert(alignment > 0); | |
2181 | ||
2182 | a = message_extend_body(m, alignment, 0, add_offset, false); | |
c1b9d935 LP |
2183 | if (!a) |
2184 | return -ENOMEM; | |
2185 | } else { | |
6647dc66 | 2186 | size_t sz; |
c1b9d935 LP |
2187 | unsigned j; |
2188 | ||
2ac7c17f | 2189 | assert(c->offsets[c->n_offsets-1] == m->body_size); |
c1b9d935 | 2190 | |
2ac7c17f | 2191 | sz = bus_gvariant_determine_word_size(m->body_size - c->begin, n_variable); |
c1b9d935 | 2192 | |
2ac7c17f | 2193 | a = message_extend_body(m, 1, sz * n_variable, add_offset, false); |
c1b9d935 LP |
2194 | if (!a) |
2195 | return -ENOMEM; | |
2196 | ||
d6385068 | 2197 | p = strempty(c->signature); |
c1b9d935 | 2198 | for (i = 0, j = 0; i < c->n_offsets; i++) { |
c1b9d935 | 2199 | unsigned k; |
6647dc66 LP |
2200 | size_t n; |
2201 | ||
2202 | r = signature_element_length(p, &n); | |
2203 | if (r < 0) | |
2204 | return r; | |
2205 | else { | |
2206 | char t[n+1]; | |
2207 | ||
2208 | memcpy(t, p, n); | |
2209 | t[n] = 0; | |
2210 | ||
2211 | p += n; | |
c1b9d935 | 2212 | |
6647dc66 LP |
2213 | r = bus_gvariant_is_fixed_size(t); |
2214 | if (r < 0) | |
2215 | return r; | |
2216 | if (r > 0 || p[0] == 0) | |
2217 | continue; | |
2218 | } | |
c1b9d935 | 2219 | |
c1b9d935 LP |
2220 | k = n_variable - 1 - j; |
2221 | ||
2ac7c17f | 2222 | bus_gvariant_write_word_le(a + k * sz, sz, c->offsets[i] - c->begin); |
c1b9d935 LP |
2223 | |
2224 | j++; | |
2225 | } | |
2226 | } | |
de1c301e LP |
2227 | |
2228 | return 0; | |
2229 | } | |
2230 | ||
d9f644e2 | 2231 | _public_ int sd_bus_message_close_container(sd_bus_message *m) { |
de1c301e | 2232 | struct bus_container *c; |
c1b9d935 | 2233 | int r; |
de1c301e | 2234 | |
9d6c7c82 LP |
2235 | assert_return(m, -EINVAL); |
2236 | assert_return(!m->sealed, -EPERM); | |
2237 | assert_return(m->n_containers > 0, -EINVAL); | |
2238 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
2239 | |
2240 | c = message_get_container(m); | |
c1b9d935 | 2241 | |
de1c301e | 2242 | if (c->enclosing != SD_BUS_TYPE_ARRAY) |
9a17484d | 2243 | if (c->signature && c->signature[c->index] != 0) |
de1c301e LP |
2244 | return -EINVAL; |
2245 | ||
de1c301e LP |
2246 | m->n_containers--; |
2247 | ||
c1b9d935 LP |
2248 | if (c->enclosing == SD_BUS_TYPE_ARRAY) |
2249 | r = bus_message_close_array(m, c); | |
2250 | else if (c->enclosing == SD_BUS_TYPE_VARIANT) | |
2251 | r = bus_message_close_variant(m, c); | |
945c2931 | 2252 | else if (IN_SET(c->enclosing, SD_BUS_TYPE_STRUCT, SD_BUS_TYPE_DICT_ENTRY)) |
c1b9d935 LP |
2253 | r = bus_message_close_struct(m, c, true); |
2254 | else | |
2255 | assert_not_reached("Unknown container type"); | |
2256 | ||
2257 | free(c->signature); | |
6647dc66 LP |
2258 | free(c->offsets); |
2259 | ||
c1b9d935 | 2260 | return r; |
de1c301e LP |
2261 | } |
2262 | ||
1b492614 LP |
2263 | typedef struct { |
2264 | const char *types; | |
2265 | unsigned n_struct; | |
2266 | unsigned n_array; | |
2267 | } TypeStack; | |
2268 | ||
2269 | static int type_stack_push(TypeStack *stack, unsigned max, unsigned *i, const char *types, unsigned n_struct, unsigned n_array) { | |
2270 | assert(stack); | |
2271 | assert(max > 0); | |
2272 | ||
2273 | if (*i >= max) | |
2274 | return -EINVAL; | |
2275 | ||
2276 | stack[*i].types = types; | |
2277 | stack[*i].n_struct = n_struct; | |
2278 | stack[*i].n_array = n_array; | |
2279 | (*i)++; | |
2280 | ||
2281 | return 0; | |
2282 | } | |
2283 | ||
2284 | static int type_stack_pop(TypeStack *stack, unsigned max, unsigned *i, const char **types, unsigned *n_struct, unsigned *n_array) { | |
2285 | assert(stack); | |
2286 | assert(max > 0); | |
2287 | assert(types); | |
2288 | assert(n_struct); | |
2289 | assert(n_array); | |
2290 | ||
2291 | if (*i <= 0) | |
2292 | return 0; | |
2293 | ||
2294 | (*i)--; | |
2295 | *types = stack[*i].types; | |
2296 | *n_struct = stack[*i].n_struct; | |
2297 | *n_array = stack[*i].n_array; | |
2298 | ||
2299 | return 1; | |
2300 | } | |
2301 | ||
19fe49f6 | 2302 | _public_ int sd_bus_message_appendv( |
de1c301e LP |
2303 | sd_bus_message *m, |
2304 | const char *types, | |
2305 | va_list ap) { | |
2306 | ||
1b492614 LP |
2307 | unsigned n_array, n_struct; |
2308 | TypeStack stack[BUS_CONTAINER_DEPTH]; | |
2309 | unsigned stack_ptr = 0; | |
de1c301e LP |
2310 | int r; |
2311 | ||
19fe49f6 FDP |
2312 | assert_return(m, -EINVAL); |
2313 | assert_return(types, -EINVAL); | |
2314 | assert_return(!m->sealed, -EPERM); | |
2315 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e | 2316 | |
1b492614 LP |
2317 | n_array = (unsigned) -1; |
2318 | n_struct = strlen(types); | |
2319 | ||
2320 | for (;;) { | |
2321 | const char *t; | |
2322 | ||
2323 | if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) { | |
2324 | r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array); | |
2325 | if (r < 0) | |
2326 | return r; | |
2327 | if (r == 0) | |
2328 | break; | |
2329 | ||
2330 | r = sd_bus_message_close_container(m); | |
2331 | if (r < 0) | |
2332 | return r; | |
2333 | ||
2334 | continue; | |
2335 | } | |
2336 | ||
2337 | t = types; | |
2338 | if (n_array != (unsigned) -1) | |
313cefa1 | 2339 | n_array--; |
1b492614 | 2340 | else { |
313cefa1 | 2341 | types++; |
1b492614 LP |
2342 | n_struct--; |
2343 | } | |
2344 | ||
de1c301e LP |
2345 | switch (*t) { |
2346 | ||
2347 | case SD_BUS_TYPE_BYTE: { | |
2348 | uint8_t x; | |
2349 | ||
2350 | x = (uint8_t) va_arg(ap, int); | |
2351 | r = sd_bus_message_append_basic(m, *t, &x); | |
2352 | break; | |
2353 | } | |
2354 | ||
2355 | case SD_BUS_TYPE_BOOLEAN: | |
2356 | case SD_BUS_TYPE_INT32: | |
9a17484d LP |
2357 | case SD_BUS_TYPE_UINT32: |
2358 | case SD_BUS_TYPE_UNIX_FD: { | |
de1c301e LP |
2359 | uint32_t x; |
2360 | ||
9a17484d LP |
2361 | /* We assume a boolean is the same as int32_t */ |
2362 | assert_cc(sizeof(int32_t) == sizeof(int)); | |
2363 | ||
de1c301e LP |
2364 | x = va_arg(ap, uint32_t); |
2365 | r = sd_bus_message_append_basic(m, *t, &x); | |
2366 | break; | |
2367 | } | |
2368 | ||
2369 | case SD_BUS_TYPE_INT16: | |
2370 | case SD_BUS_TYPE_UINT16: { | |
2371 | uint16_t x; | |
2372 | ||
2373 | x = (uint16_t) va_arg(ap, int); | |
2374 | r = sd_bus_message_append_basic(m, *t, &x); | |
2375 | break; | |
2376 | } | |
2377 | ||
2378 | case SD_BUS_TYPE_INT64: | |
6cd37a5e | 2379 | case SD_BUS_TYPE_UINT64: { |
de1c301e LP |
2380 | uint64_t x; |
2381 | ||
2382 | x = va_arg(ap, uint64_t); | |
2383 | r = sd_bus_message_append_basic(m, *t, &x); | |
2384 | break; | |
2385 | } | |
2386 | ||
6cd37a5e LP |
2387 | case SD_BUS_TYPE_DOUBLE: { |
2388 | double x; | |
2389 | ||
2390 | x = va_arg(ap, double); | |
2391 | r = sd_bus_message_append_basic(m, *t, &x); | |
2392 | break; | |
2393 | } | |
2394 | ||
de1c301e LP |
2395 | case SD_BUS_TYPE_STRING: |
2396 | case SD_BUS_TYPE_OBJECT_PATH: | |
2397 | case SD_BUS_TYPE_SIGNATURE: { | |
2398 | const char *x; | |
2399 | ||
2400 | x = va_arg(ap, const char*); | |
2401 | r = sd_bus_message_append_basic(m, *t, x); | |
2402 | break; | |
2403 | } | |
2404 | ||
de1c301e | 2405 | case SD_BUS_TYPE_ARRAY: { |
de1c301e LP |
2406 | size_t k; |
2407 | ||
2408 | r = signature_element_length(t + 1, &k); | |
2409 | if (r < 0) | |
2410 | return r; | |
2411 | ||
2412 | { | |
2413 | char s[k + 1]; | |
de1c301e LP |
2414 | memcpy(s, t + 1, k); |
2415 | s[k] = 0; | |
de1c301e LP |
2416 | |
2417 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, s); | |
2418 | if (r < 0) | |
2419 | return r; | |
1b492614 | 2420 | } |
de1c301e | 2421 | |
1b492614 LP |
2422 | if (n_array == (unsigned) -1) { |
2423 | types += k; | |
2424 | n_struct -= k; | |
de1c301e LP |
2425 | } |
2426 | ||
1b492614 LP |
2427 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
2428 | if (r < 0) | |
2429 | return r; | |
2430 | ||
2431 | types = t + 1; | |
2432 | n_struct = k; | |
2433 | n_array = va_arg(ap, unsigned); | |
2434 | ||
de1c301e LP |
2435 | break; |
2436 | } | |
2437 | ||
2438 | case SD_BUS_TYPE_VARIANT: { | |
2439 | const char *s; | |
2440 | ||
2441 | s = va_arg(ap, const char*); | |
2442 | if (!s) | |
2443 | return -EINVAL; | |
2444 | ||
2445 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_VARIANT, s); | |
2446 | if (r < 0) | |
2447 | return r; | |
2448 | ||
1b492614 | 2449 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
de1c301e LP |
2450 | if (r < 0) |
2451 | return r; | |
2452 | ||
1b492614 LP |
2453 | types = s; |
2454 | n_struct = strlen(s); | |
2455 | n_array = (unsigned) -1; | |
2456 | ||
de1c301e LP |
2457 | break; |
2458 | } | |
2459 | ||
2460 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
2461 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
2462 | size_t k; | |
2463 | ||
2464 | r = signature_element_length(t, &k); | |
2465 | if (r < 0) | |
2466 | return r; | |
2467 | ||
2468 | { | |
2469 | char s[k - 1]; | |
2470 | ||
2471 | memcpy(s, t + 1, k - 2); | |
2472 | s[k - 2] = 0; | |
2473 | ||
2474 | r = sd_bus_message_open_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
2475 | if (r < 0) | |
2476 | return r; | |
1b492614 | 2477 | } |
de1c301e | 2478 | |
1b492614 LP |
2479 | if (n_array == (unsigned) -1) { |
2480 | types += k - 1; | |
2481 | n_struct -= k - 1; | |
2482 | } | |
de1c301e | 2483 | |
1b492614 LP |
2484 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
2485 | if (r < 0) | |
2486 | return r; | |
de1c301e | 2487 | |
1b492614 LP |
2488 | types = t + 1; |
2489 | n_struct = k - 2; | |
2490 | n_array = (unsigned) -1; | |
de1c301e LP |
2491 | |
2492 | break; | |
2493 | } | |
2494 | ||
2495 | default: | |
2496 | r = -EINVAL; | |
2497 | } | |
2498 | ||
2499 | if (r < 0) | |
2500 | return r; | |
2501 | } | |
2502 | ||
ebcf1f97 | 2503 | return 1; |
de1c301e LP |
2504 | } |
2505 | ||
d9f644e2 | 2506 | _public_ int sd_bus_message_append(sd_bus_message *m, const char *types, ...) { |
de1c301e LP |
2507 | va_list ap; |
2508 | int r; | |
2509 | ||
9d6c7c82 LP |
2510 | assert_return(m, -EINVAL); |
2511 | assert_return(types, -EINVAL); | |
2512 | assert_return(!m->sealed, -EPERM); | |
2513 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
2514 | |
2515 | va_start(ap, types); | |
19fe49f6 | 2516 | r = sd_bus_message_appendv(m, types, ap); |
de1c301e LP |
2517 | va_end(ap); |
2518 | ||
2519 | return r; | |
2520 | } | |
2521 | ||
c1b9d935 LP |
2522 | _public_ int sd_bus_message_append_array_space( |
2523 | sd_bus_message *m, | |
2524 | char type, | |
2525 | size_t size, | |
2526 | void **ptr) { | |
2527 | ||
b3af9646 LP |
2528 | ssize_t align, sz; |
2529 | void *a; | |
2530 | int r; | |
2531 | ||
9d6c7c82 LP |
2532 | assert_return(m, -EINVAL); |
2533 | assert_return(!m->sealed, -EPERM); | |
0039a203 | 2534 | assert_return(bus_type_is_trivial(type) && type != SD_BUS_TYPE_BOOLEAN, -EINVAL); |
9d6c7c82 LP |
2535 | assert_return(ptr || size == 0, -EINVAL); |
2536 | assert_return(!m->poisoned, -ESTALE); | |
b3af9646 | 2537 | |
0039a203 LP |
2538 | /* alignment and size of the trivial types (except bool) is |
2539 | * identical for gvariant and dbus1 marshalling */ | |
b3af9646 LP |
2540 | align = bus_type_get_alignment(type); |
2541 | sz = bus_type_get_size(type); | |
2542 | ||
2543 | assert_se(align > 0); | |
2544 | assert_se(sz > 0); | |
2545 | ||
2546 | if (size % sz != 0) | |
2547 | return -EINVAL; | |
2548 | ||
2549 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
2550 | if (r < 0) | |
2551 | return r; | |
2552 | ||
2ac7c17f | 2553 | a = message_extend_body(m, align, size, false, false); |
bc7fd8cd LP |
2554 | if (!a) |
2555 | return -ENOMEM; | |
b3af9646 LP |
2556 | |
2557 | r = sd_bus_message_close_container(m); | |
2558 | if (r < 0) | |
bc7fd8cd | 2559 | return r; |
b3af9646 LP |
2560 | |
2561 | *ptr = a; | |
2562 | return 0; | |
b3af9646 LP |
2563 | } |
2564 | ||
7dcd79c2 LP |
2565 | _public_ int sd_bus_message_append_array( |
2566 | sd_bus_message *m, | |
2567 | char type, | |
2568 | const void *ptr, | |
2569 | size_t size) { | |
b3af9646 LP |
2570 | int r; |
2571 | void *p; | |
2572 | ||
9d6c7c82 LP |
2573 | assert_return(m, -EINVAL); |
2574 | assert_return(!m->sealed, -EPERM); | |
2575 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
2576 | assert_return(ptr || size == 0, -EINVAL); | |
2577 | assert_return(!m->poisoned, -ESTALE); | |
b3af9646 | 2578 | |
f8e013f8 | 2579 | r = sd_bus_message_append_array_space(m, type, size, &p); |
b3af9646 LP |
2580 | if (r < 0) |
2581 | return r; | |
2582 | ||
75f32f04 | 2583 | memcpy_safe(p, ptr, size); |
b3af9646 LP |
2584 | |
2585 | return 0; | |
2586 | } | |
2587 | ||
938bcbab LP |
2588 | _public_ int sd_bus_message_append_array_iovec( |
2589 | sd_bus_message *m, | |
2590 | char type, | |
2591 | const struct iovec *iov, | |
2592 | unsigned n) { | |
2593 | ||
2594 | size_t size; | |
2595 | unsigned i; | |
2596 | void *p; | |
2597 | int r; | |
2598 | ||
2599 | assert_return(m, -EINVAL); | |
2600 | assert_return(!m->sealed, -EPERM); | |
2601 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
2602 | assert_return(iov || n == 0, -EINVAL); | |
2603 | assert_return(!m->poisoned, -ESTALE); | |
2604 | ||
2605 | size = IOVEC_TOTAL_SIZE(iov, n); | |
2606 | ||
2607 | r = sd_bus_message_append_array_space(m, type, size, &p); | |
2608 | if (r < 0) | |
2609 | return r; | |
2610 | ||
2611 | for (i = 0; i < n; i++) { | |
2612 | ||
2613 | if (iov[i].iov_base) | |
2614 | memcpy(p, iov[i].iov_base, iov[i].iov_len); | |
2615 | else | |
29804cc1 | 2616 | memzero(p, iov[i].iov_len); |
938bcbab LP |
2617 | |
2618 | p = (uint8_t*) p + iov[i].iov_len; | |
2619 | } | |
2620 | ||
2621 | return 0; | |
2622 | } | |
2623 | ||
7dcd79c2 LP |
2624 | _public_ int sd_bus_message_append_array_memfd( |
2625 | sd_bus_message *m, | |
2626 | char type, | |
2627 | int memfd, | |
2628 | uint64_t offset, | |
2629 | uint64_t size) { | |
2630 | ||
453a0c29 LP |
2631 | _cleanup_close_ int copy_fd = -1; |
2632 | struct bus_body_part *part; | |
2633 | ssize_t align, sz; | |
7dcd79c2 | 2634 | uint64_t real_size; |
453a0c29 LP |
2635 | void *a; |
2636 | int r; | |
2637 | ||
7dcd79c2 | 2638 | assert_return(m, -EINVAL); |
8ac43fee | 2639 | assert_return(memfd >= 0, -EBADF); |
7dcd79c2 LP |
2640 | assert_return(bus_type_is_trivial(type), -EINVAL); |
2641 | assert_return(size > 0, -EINVAL); | |
2642 | assert_return(!m->sealed, -EPERM); | |
2643 | assert_return(!m->poisoned, -ESTALE); | |
453a0c29 | 2644 | |
fac9c0d5 | 2645 | r = memfd_set_sealed(memfd); |
453a0c29 LP |
2646 | if (r < 0) |
2647 | return r; | |
2648 | ||
fac9c0d5 | 2649 | copy_fd = dup(memfd); |
453a0c29 LP |
2650 | if (copy_fd < 0) |
2651 | return copy_fd; | |
2652 | ||
7dcd79c2 | 2653 | r = memfd_get_size(memfd, &real_size); |
453a0c29 LP |
2654 | if (r < 0) |
2655 | return r; | |
2656 | ||
7dcd79c2 LP |
2657 | if (offset == 0 && size == (uint64_t) -1) |
2658 | size = real_size; | |
2659 | else if (offset + size > real_size) | |
2660 | return -EMSGSIZE; | |
2661 | ||
453a0c29 LP |
2662 | align = bus_type_get_alignment(type); |
2663 | sz = bus_type_get_size(type); | |
2664 | ||
2665 | assert_se(align > 0); | |
2666 | assert_se(sz > 0); | |
2667 | ||
7dcd79c2 LP |
2668 | if (offset % align != 0) |
2669 | return -EINVAL; | |
2670 | ||
453a0c29 LP |
2671 | if (size % sz != 0) |
2672 | return -EINVAL; | |
2673 | ||
5cbe7492 | 2674 | if (size > (uint64_t) (uint32_t) -1) |
453a0c29 LP |
2675 | return -EINVAL; |
2676 | ||
2677 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
2678 | if (r < 0) | |
2679 | return r; | |
2680 | ||
2ac7c17f | 2681 | a = message_extend_body(m, align, 0, false, false); |
453a0c29 LP |
2682 | if (!a) |
2683 | return -ENOMEM; | |
2684 | ||
2685 | part = message_append_part(m); | |
2686 | if (!part) | |
2687 | return -ENOMEM; | |
2688 | ||
2689 | part->memfd = copy_fd; | |
7dcd79c2 | 2690 | part->memfd_offset = offset; |
453a0c29 LP |
2691 | part->sealed = true; |
2692 | part->size = size; | |
2693 | copy_fd = -1; | |
2694 | ||
2ac7c17f | 2695 | m->body_size += size; |
0039a203 | 2696 | message_extend_containers(m, size); |
453a0c29 LP |
2697 | |
2698 | return sd_bus_message_close_container(m); | |
2699 | } | |
2700 | ||
7dcd79c2 LP |
2701 | _public_ int sd_bus_message_append_string_memfd( |
2702 | sd_bus_message *m, | |
2703 | int memfd, | |
2704 | uint64_t offset, | |
2705 | uint64_t size) { | |
2706 | ||
5cbe7492 LP |
2707 | _cleanup_close_ int copy_fd = -1; |
2708 | struct bus_body_part *part; | |
2709 | struct bus_container *c; | |
7dcd79c2 | 2710 | uint64_t real_size; |
5cbe7492 LP |
2711 | void *a; |
2712 | int r; | |
2713 | ||
55736ed0 | 2714 | assert_return(m, -EINVAL); |
8ac43fee | 2715 | assert_return(memfd >= 0, -EBADF); |
7dcd79c2 | 2716 | assert_return(size > 0, -EINVAL); |
55736ed0 LP |
2717 | assert_return(!m->sealed, -EPERM); |
2718 | assert_return(!m->poisoned, -ESTALE); | |
5cbe7492 | 2719 | |
fac9c0d5 | 2720 | r = memfd_set_sealed(memfd); |
5cbe7492 LP |
2721 | if (r < 0) |
2722 | return r; | |
2723 | ||
fac9c0d5 | 2724 | copy_fd = dup(memfd); |
5cbe7492 LP |
2725 | if (copy_fd < 0) |
2726 | return copy_fd; | |
2727 | ||
7dcd79c2 | 2728 | r = memfd_get_size(memfd, &real_size); |
5cbe7492 LP |
2729 | if (r < 0) |
2730 | return r; | |
2731 | ||
7dcd79c2 LP |
2732 | if (offset == 0 && size == (uint64_t) -1) |
2733 | size = real_size; | |
2734 | else if (offset + size > real_size) | |
2735 | return -EMSGSIZE; | |
2736 | ||
5cbe7492 LP |
2737 | /* We require this to be NUL terminated */ |
2738 | if (size == 0) | |
2739 | return -EINVAL; | |
2740 | ||
2741 | if (size > (uint64_t) (uint32_t) -1) | |
2742 | return -EINVAL; | |
2743 | ||
2744 | c = message_get_container(m); | |
2745 | if (c->signature && c->signature[c->index]) { | |
2746 | /* Container signature is already set */ | |
2747 | ||
2748 | if (c->signature[c->index] != SD_BUS_TYPE_STRING) | |
2749 | return -ENXIO; | |
2750 | } else { | |
2751 | char *e; | |
2752 | ||
ad67ef27 | 2753 | /* Maybe we can append to the signature? But only if this is the top-level container */ |
5cbe7492 LP |
2754 | if (c->enclosing != 0) |
2755 | return -ENXIO; | |
2756 | ||
2757 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL); | |
2758 | if (!e) { | |
2759 | m->poisoned = true; | |
2760 | return -ENOMEM; | |
2761 | } | |
2762 | } | |
2763 | ||
6647dc66 | 2764 | if (!BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f | 2765 | a = message_extend_body(m, 4, 4, false, false); |
c1b9d935 LP |
2766 | if (!a) |
2767 | return -ENOMEM; | |
5cbe7492 | 2768 | |
c1b9d935 LP |
2769 | *(uint32_t*) a = size - 1; |
2770 | } | |
5cbe7492 LP |
2771 | |
2772 | part = message_append_part(m); | |
2773 | if (!part) | |
2774 | return -ENOMEM; | |
2775 | ||
2776 | part->memfd = copy_fd; | |
7dcd79c2 | 2777 | part->memfd_offset = offset; |
5cbe7492 LP |
2778 | part->sealed = true; |
2779 | part->size = size; | |
2780 | copy_fd = -1; | |
2781 | ||
2ac7c17f | 2782 | m->body_size += size; |
c1b9d935 LP |
2783 | message_extend_containers(m, size); |
2784 | ||
6647dc66 | 2785 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f | 2786 | r = message_add_offset(m, m->body_size); |
c1b9d935 LP |
2787 | if (r < 0) { |
2788 | m->poisoned = true; | |
2789 | return -ENOMEM; | |
2790 | } | |
2791 | } | |
5cbe7492 LP |
2792 | |
2793 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2794 | c->index++; | |
2795 | ||
2796 | return 0; | |
2797 | } | |
2798 | ||
d9f644e2 | 2799 | _public_ int sd_bus_message_append_strv(sd_bus_message *m, char **l) { |
55736ed0 LP |
2800 | char **i; |
2801 | int r; | |
2802 | ||
2803 | assert_return(m, -EINVAL); | |
2804 | assert_return(!m->sealed, -EPERM); | |
2805 | assert_return(!m->poisoned, -ESTALE); | |
2806 | ||
2807 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2808 | if (r < 0) | |
2809 | return r; | |
2810 | ||
2811 | STRV_FOREACH(i, l) { | |
2812 | r = sd_bus_message_append_basic(m, 's', *i); | |
2813 | if (r < 0) | |
2814 | return r; | |
2815 | } | |
2816 | ||
2817 | return sd_bus_message_close_container(m); | |
2818 | } | |
2819 | ||
81389225 | 2820 | static int bus_message_close_header(sd_bus_message *m) { |
81389225 LP |
2821 | |
2822 | assert(m); | |
2823 | ||
2ac7c17f LP |
2824 | /* The actual user data is finished now, we just complete the |
2825 | variant and struct now (at least on gvariant). Remember | |
61233823 | 2826 | this position, so that during parsing we know where to |
2ac7c17f LP |
2827 | put the outer container end. */ |
2828 | m->user_body_size = m->body_size; | |
81389225 | 2829 | |
2ac7c17f LP |
2830 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2831 | const char *signature; | |
2832 | size_t sz, l; | |
2833 | void *d; | |
b381de41 | 2834 | |
2ac7c17f LP |
2835 | /* Add offset table to end of fields array */ |
2836 | if (m->n_header_offsets >= 1) { | |
2837 | uint8_t *a; | |
2838 | unsigned i; | |
b381de41 | 2839 | |
2ac7c17f | 2840 | assert(m->fields_size == m->header_offsets[m->n_header_offsets-1]); |
b381de41 | 2841 | |
2ac7c17f LP |
2842 | sz = bus_gvariant_determine_word_size(m->fields_size, m->n_header_offsets); |
2843 | a = message_extend_fields(m, 1, sz * m->n_header_offsets, false); | |
2844 | if (!a) | |
2845 | return -ENOMEM; | |
2846 | ||
2847 | for (i = 0; i < m->n_header_offsets; i++) | |
2848 | bus_gvariant_write_word_le(a + sz*i, sz, m->header_offsets[i]); | |
2849 | } | |
2850 | ||
2851 | /* Add gvariant NUL byte plus signature to the end of | |
2852 | * the body, followed by the final offset pointing to | |
2853 | * the end of the fields array */ | |
b381de41 | 2854 | |
2ac7c17f LP |
2855 | signature = strempty(m->root_container.signature); |
2856 | l = strlen(signature); | |
2857 | ||
03ebf5e8 DH |
2858 | sz = bus_gvariant_determine_word_size(sizeof(struct bus_header) + ALIGN8(m->fields_size) + m->body_size + 1 + l + 2, 1); |
2859 | d = message_extend_body(m, 1, 1 + l + 2 + sz, false, true); | |
2ac7c17f LP |
2860 | if (!d) |
2861 | return -ENOMEM; | |
2862 | ||
2863 | *(uint8_t*) d = 0; | |
03ebf5e8 DH |
2864 | *((uint8_t*) d + 1) = SD_BUS_TYPE_STRUCT_BEGIN; |
2865 | memcpy((uint8_t*) d + 2, signature, l); | |
2866 | *((uint8_t*) d + 1 + l + 1) = SD_BUS_TYPE_STRUCT_END; | |
2ac7c17f | 2867 | |
03ebf5e8 | 2868 | bus_gvariant_write_word_le((uint8_t*) d + 1 + l + 2, sz, sizeof(struct bus_header) + m->fields_size); |
2ac7c17f LP |
2869 | |
2870 | m->footer = d; | |
03ebf5e8 | 2871 | m->footer_accessible = 1 + l + 2 + sz; |
2ac7c17f LP |
2872 | } else { |
2873 | m->header->dbus1.fields_size = m->fields_size; | |
2874 | m->header->dbus1.body_size = m->body_size; | |
2875 | } | |
81389225 LP |
2876 | |
2877 | return 0; | |
2878 | } | |
2879 | ||
75bcbcf2 | 2880 | _public_ int sd_bus_message_seal(sd_bus_message *m, uint64_t cookie, uint64_t timeout_usec) { |
81389225 | 2881 | struct bus_body_part *part; |
2ac7c17f | 2882 | size_t a; |
81389225 LP |
2883 | unsigned i; |
2884 | int r; | |
2885 | ||
75bcbcf2 | 2886 | assert_return(m, -EINVAL); |
81389225 LP |
2887 | |
2888 | if (m->sealed) | |
2889 | return -EPERM; | |
2890 | ||
2891 | if (m->n_containers > 0) | |
2892 | return -EBADMSG; | |
2893 | ||
2894 | if (m->poisoned) | |
2895 | return -ESTALE; | |
2896 | ||
2ac7c17f LP |
2897 | if (cookie > 0xffffffffULL && |
2898 | !BUS_MESSAGE_IS_GVARIANT(m)) | |
15411c0c | 2899 | return -EOPNOTSUPP; |
2ac7c17f | 2900 | |
81389225 LP |
2901 | /* In vtables the return signature of method calls is listed, |
2902 | * let's check if they match if this is a response */ | |
2903 | if (m->header->type == SD_BUS_MESSAGE_METHOD_RETURN && | |
2904 | m->enforced_reply_signature && | |
2905 | !streq(strempty(m->root_container.signature), m->enforced_reply_signature)) | |
2906 | return -ENOMSG; | |
2907 | ||
2908 | /* If gvariant marshalling is used we need to close the body structure */ | |
2909 | r = bus_message_close_struct(m, &m->root_container, false); | |
2910 | if (r < 0) | |
2911 | return r; | |
2912 | ||
2ac7c17f LP |
2913 | /* If there's a non-trivial signature set, then add it in |
2914 | * here, but only on dbus1 */ | |
2915 | if (!isempty(m->root_container.signature) && !BUS_MESSAGE_IS_GVARIANT(m)) { | |
81389225 LP |
2916 | r = message_append_field_signature(m, BUS_MESSAGE_HEADER_SIGNATURE, m->root_container.signature, NULL); |
2917 | if (r < 0) | |
2918 | return r; | |
2919 | } | |
2920 | ||
2921 | if (m->n_fds > 0) { | |
2922 | r = message_append_field_uint32(m, BUS_MESSAGE_HEADER_UNIX_FDS, m->n_fds); | |
2923 | if (r < 0) | |
2924 | return r; | |
2925 | } | |
2926 | ||
2927 | r = bus_message_close_header(m); | |
2928 | if (r < 0) | |
2929 | return r; | |
2930 | ||
2ac7c17f LP |
2931 | if (BUS_MESSAGE_IS_GVARIANT(m)) |
2932 | m->header->dbus2.cookie = cookie; | |
2933 | else | |
2934 | m->header->dbus1.serial = (uint32_t) cookie; | |
2935 | ||
75bcbcf2 | 2936 | m->timeout = m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED ? 0 : timeout_usec; |
81389225 LP |
2937 | |
2938 | /* Add padding at the end of the fields part, since we know | |
2939 | * the body needs to start at an 8 byte alignment. We made | |
2940 | * sure we allocated enough space for this, so all we need to | |
2941 | * do here is to zero it out. */ | |
2ac7c17f | 2942 | a = ALIGN8(m->fields_size) - m->fields_size; |
81389225 | 2943 | if (a > 0) |
2ac7c17f | 2944 | memzero((uint8_t*) BUS_MESSAGE_FIELDS(m) + m->fields_size, a); |
81389225 LP |
2945 | |
2946 | /* If this is something we can send as memfd, then let's seal | |
2947 | the memfd now. Note that we can send memfds as payload only | |
2948 | for directed messages, and not for broadcasts. */ | |
2a0958d2 | 2949 | if (m->destination && m->bus->use_memfd) { |
81389225 | 2950 | MESSAGE_FOREACH_PART(part, i, m) |
2ac7c17f LP |
2951 | if (part->memfd >= 0 && |
2952 | !part->sealed && | |
2953 | (part->size > MEMFD_MIN_SIZE || m->bus->use_memfd < 0) && | |
2954 | part != m->body_end) { /* The last part may never be sent as memfd */ | |
8e959fbf LP |
2955 | uint64_t sz; |
2956 | ||
2957 | /* Try to seal it if that makes | |
2958 | * sense. First, unmap our own map to | |
2959 | * make sure we don't keep it busy. */ | |
81389225 LP |
2960 | bus_body_part_unmap(part); |
2961 | ||
8e959fbf LP |
2962 | /* Then, sync up real memfd size */ |
2963 | sz = part->size; | |
73843b52 LP |
2964 | r = memfd_set_size(part->memfd, sz); |
2965 | if (r < 0) | |
2966 | return r; | |
8e959fbf LP |
2967 | |
2968 | /* Finally, try to seal */ | |
73843b52 | 2969 | if (memfd_set_sealed(part->memfd) >= 0) |
81389225 LP |
2970 | part->sealed = true; |
2971 | } | |
2972 | } | |
2973 | ||
2ac7c17f | 2974 | m->root_container.end = m->user_body_size; |
81389225 LP |
2975 | m->root_container.index = 0; |
2976 | m->root_container.offset_index = 0; | |
2977 | m->root_container.item_size = m->root_container.n_offsets > 0 ? m->root_container.offsets[0] : 0; | |
2978 | ||
2979 | m->sealed = true; | |
2980 | ||
2981 | return 0; | |
2982 | } | |
2983 | ||
a392d361 | 2984 | int bus_body_part_map(struct bus_body_part *part) { |
453a0c29 | 2985 | void *p; |
7dcd79c2 | 2986 | size_t psz, shift; |
453a0c29 LP |
2987 | |
2988 | assert_se(part); | |
2989 | ||
2990 | if (part->data) | |
2991 | return 0; | |
2992 | ||
2993 | if (part->size <= 0) | |
2994 | return 0; | |
2995 | ||
1307c3ff LP |
2996 | /* For smaller zero parts (as used for padding) we don't need to map anything... */ |
2997 | if (part->memfd < 0 && part->is_zero && part->size < 8) { | |
2998 | static const uint8_t zeroes[7] = { }; | |
2999 | part->data = (void*) zeroes; | |
3000 | return 0; | |
3001 | } | |
3002 | ||
7dcd79c2 LP |
3003 | shift = part->memfd_offset - ((part->memfd_offset / page_size()) * page_size()); |
3004 | psz = PAGE_ALIGN(part->size + shift); | |
453a0c29 LP |
3005 | |
3006 | if (part->memfd >= 0) | |
7dcd79c2 | 3007 | p = mmap(NULL, psz, PROT_READ, MAP_PRIVATE, part->memfd, part->memfd_offset - shift); |
453a0c29 LP |
3008 | else if (part->is_zero) |
3009 | p = mmap(NULL, psz, PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
3010 | else | |
3011 | return -EINVAL; | |
3012 | ||
3013 | if (p == MAP_FAILED) | |
3014 | return -errno; | |
3015 | ||
3016 | part->mapped = psz; | |
7dcd79c2 LP |
3017 | part->mmap_begin = p; |
3018 | part->data = (uint8_t*) p + shift; | |
a392d361 LP |
3019 | part->munmap_this = true; |
3020 | ||
453a0c29 LP |
3021 | return 0; |
3022 | } | |
3023 | ||
a392d361 LP |
3024 | void bus_body_part_unmap(struct bus_body_part *part) { |
3025 | ||
3026 | assert_se(part); | |
3027 | ||
3028 | if (part->memfd < 0) | |
3029 | return; | |
3030 | ||
7dcd79c2 | 3031 | if (!part->mmap_begin) |
a392d361 LP |
3032 | return; |
3033 | ||
bf30e48f KS |
3034 | if (!part->munmap_this) |
3035 | return; | |
a392d361 | 3036 | |
7dcd79c2 | 3037 | assert_se(munmap(part->mmap_begin, part->mapped) == 0); |
a392d361 | 3038 | |
7dcd79c2 | 3039 | part->mmap_begin = NULL; |
a392d361 LP |
3040 | part->data = NULL; |
3041 | part->mapped = 0; | |
3042 | part->munmap_this = false; | |
3043 | ||
3044 | return; | |
3045 | } | |
3046 | ||
9a17484d | 3047 | static int buffer_peek(const void *p, uint32_t sz, size_t *rindex, size_t align, size_t nbytes, void **r) { |
bc7fd8cd | 3048 | size_t k, start, end; |
de1c301e | 3049 | |
9a17484d LP |
3050 | assert(rindex); |
3051 | assert(align > 0); | |
de1c301e | 3052 | |
9a17484d | 3053 | start = ALIGN_TO((size_t) *rindex, align); |
bc7fd8cd | 3054 | end = start + nbytes; |
9a17484d | 3055 | |
bc7fd8cd | 3056 | if (end > sz) |
9a17484d LP |
3057 | return -EBADMSG; |
3058 | ||
3059 | /* Verify that padding is 0 */ | |
3060 | for (k = *rindex; k < start; k++) | |
3061 | if (((const uint8_t*) p)[k] != 0) | |
3062 | return -EBADMSG; | |
3063 | ||
3064 | if (r) | |
3065 | *r = (uint8_t*) p + start; | |
3066 | ||
bc7fd8cd | 3067 | *rindex = end; |
9a17484d LP |
3068 | |
3069 | return 1; | |
de1c301e LP |
3070 | } |
3071 | ||
7b058942 LP |
3072 | static bool message_end_of_signature(sd_bus_message *m) { |
3073 | struct bus_container *c; | |
3074 | ||
3075 | assert(m); | |
3076 | ||
3077 | c = message_get_container(m); | |
3078 | return !c->signature || c->signature[c->index] == 0; | |
3079 | } | |
3080 | ||
9a17484d LP |
3081 | static bool message_end_of_array(sd_bus_message *m, size_t index) { |
3082 | struct bus_container *c; | |
de1c301e | 3083 | |
9a17484d | 3084 | assert(m); |
de1c301e | 3085 | |
9a17484d | 3086 | c = message_get_container(m); |
6647dc66 | 3087 | if (c->enclosing != SD_BUS_TYPE_ARRAY) |
9a17484d | 3088 | return false; |
de1c301e | 3089 | |
6647dc66 LP |
3090 | if (BUS_MESSAGE_IS_GVARIANT(m)) |
3091 | return index >= c->end; | |
3092 | else { | |
3093 | assert(c->array_size); | |
3094 | return index >= c->begin + BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
3095 | } | |
de1c301e LP |
3096 | } |
3097 | ||
1405bef3 | 3098 | _public_ int sd_bus_message_at_end(sd_bus_message *m, int complete) { |
7b058942 LP |
3099 | assert_return(m, -EINVAL); |
3100 | assert_return(m->sealed, -EPERM); | |
3101 | ||
3102 | if (complete && m->n_containers > 0) | |
3103 | return false; | |
3104 | ||
3105 | if (message_end_of_signature(m)) | |
3106 | return true; | |
3107 | ||
3108 | if (message_end_of_array(m, m->rindex)) | |
3109 | return true; | |
3110 | ||
3111 | return false; | |
3112 | } | |
3113 | ||
bc7fd8cd LP |
3114 | static struct bus_body_part* find_part(sd_bus_message *m, size_t index, size_t sz, void **p) { |
3115 | struct bus_body_part *part; | |
3116 | size_t begin; | |
453a0c29 LP |
3117 | int r; |
3118 | ||
bc7fd8cd LP |
3119 | assert(m); |
3120 | ||
3121 | if (m->cached_rindex_part && index >= m->cached_rindex_part_begin) { | |
3122 | part = m->cached_rindex_part; | |
3123 | begin = m->cached_rindex_part_begin; | |
3124 | } else { | |
3125 | part = &m->body; | |
3126 | begin = 0; | |
3127 | } | |
3128 | ||
3129 | while (part) { | |
3130 | if (index < begin) | |
3131 | return NULL; | |
3132 | ||
3133 | if (index + sz <= begin + part->size) { | |
453a0c29 | 3134 | |
a392d361 | 3135 | r = bus_body_part_map(part); |
453a0c29 LP |
3136 | if (r < 0) |
3137 | return NULL; | |
3138 | ||
bc7fd8cd | 3139 | if (p) |
453a0c29 | 3140 | *p = (uint8_t*) part->data + index - begin; |
bc7fd8cd LP |
3141 | |
3142 | m->cached_rindex_part = part; | |
3143 | m->cached_rindex_part_begin = begin; | |
3144 | ||
3145 | return part; | |
3146 | } | |
3147 | ||
453a0c29 | 3148 | begin += part->size; |
bc7fd8cd LP |
3149 | part = part->next; |
3150 | } | |
3151 | ||
3152 | return NULL; | |
3153 | } | |
3154 | ||
6647dc66 LP |
3155 | static int container_next_item(sd_bus_message *m, struct bus_container *c, size_t *rindex) { |
3156 | int r; | |
3157 | ||
3158 | assert(m); | |
3159 | assert(c); | |
3160 | assert(rindex); | |
3161 | ||
3162 | if (!BUS_MESSAGE_IS_GVARIANT(m)) | |
3163 | return 0; | |
3164 | ||
3165 | if (c->enclosing == SD_BUS_TYPE_ARRAY) { | |
3166 | int sz; | |
3167 | ||
3168 | sz = bus_gvariant_get_size(c->signature); | |
3169 | if (sz < 0) { | |
3170 | int alignment; | |
3171 | ||
3172 | if (c->offset_index+1 >= c->n_offsets) | |
3173 | goto end; | |
3174 | ||
3175 | /* Variable-size array */ | |
3176 | ||
3177 | alignment = bus_gvariant_get_alignment(c->signature); | |
3178 | assert(alignment > 0); | |
3179 | ||
3180 | *rindex = ALIGN_TO(c->offsets[c->offset_index], alignment); | |
3181 | c->item_size = c->offsets[c->offset_index+1] - *rindex; | |
3182 | } else { | |
0039a203 LP |
3183 | |
3184 | if (c->offset_index+1 >= (c->end-c->begin)/sz) | |
3185 | goto end; | |
3186 | ||
6647dc66 | 3187 | /* Fixed-size array */ |
0039a203 | 3188 | *rindex = c->begin + (c->offset_index+1) * sz; |
6647dc66 LP |
3189 | c->item_size = sz; |
3190 | } | |
3191 | ||
3192 | c->offset_index++; | |
3193 | ||
945c2931 | 3194 | } else if (IN_SET(c->enclosing, 0, SD_BUS_TYPE_STRUCT, SD_BUS_TYPE_DICT_ENTRY)) { |
6647dc66 LP |
3195 | |
3196 | int alignment; | |
3197 | size_t n, j; | |
3198 | ||
3199 | if (c->offset_index+1 >= c->n_offsets) | |
3200 | goto end; | |
3201 | ||
3202 | r = signature_element_length(c->signature + c->index, &n); | |
3203 | if (r < 0) | |
3204 | return r; | |
3205 | ||
3206 | r = signature_element_length(c->signature + c->index + n, &j); | |
3207 | if (r < 0) | |
3208 | return r; | |
3209 | else { | |
3210 | char t[j+1]; | |
3211 | memcpy(t, c->signature + c->index + n, j); | |
3212 | t[j] = 0; | |
3213 | ||
3214 | alignment = bus_gvariant_get_alignment(t); | |
3215 | } | |
3216 | ||
3217 | assert(alignment > 0); | |
3218 | ||
3219 | *rindex = ALIGN_TO(c->offsets[c->offset_index], alignment); | |
3220 | c->item_size = c->offsets[c->offset_index+1] - *rindex; | |
3221 | ||
3222 | c->offset_index++; | |
3223 | ||
3224 | } else if (c->enclosing == SD_BUS_TYPE_VARIANT) | |
3225 | goto end; | |
3226 | else | |
3227 | assert_not_reached("Unknown container type"); | |
3228 | ||
3229 | return 0; | |
3230 | ||
3231 | end: | |
3232 | /* Reached the end */ | |
3233 | *rindex = c->end; | |
3234 | c->item_size = 0; | |
3235 | return 0; | |
3236 | } | |
3237 | ||
3238 | ||
bc7fd8cd LP |
3239 | static int message_peek_body( |
3240 | sd_bus_message *m, | |
3241 | size_t *rindex, | |
3242 | size_t align, | |
3243 | size_t nbytes, | |
3244 | void **ret) { | |
3245 | ||
3246 | size_t k, start, end, padding; | |
3247 | struct bus_body_part *part; | |
3248 | uint8_t *q; | |
3249 | ||
de1c301e | 3250 | assert(m); |
9a17484d LP |
3251 | assert(rindex); |
3252 | assert(align > 0); | |
de1c301e | 3253 | |
bc7fd8cd LP |
3254 | start = ALIGN_TO((size_t) *rindex, align); |
3255 | padding = start - *rindex; | |
3256 | end = start + nbytes; | |
3257 | ||
2ac7c17f | 3258 | if (end > m->user_body_size) |
bc7fd8cd LP |
3259 | return -EBADMSG; |
3260 | ||
3261 | part = find_part(m, *rindex, padding, (void**) &q); | |
3262 | if (!part) | |
3263 | return -EBADMSG; | |
3264 | ||
3265 | if (q) { | |
3266 | /* Verify padding */ | |
3267 | for (k = 0; k < padding; k++) | |
3268 | if (q[k] != 0) | |
3269 | return -EBADMSG; | |
3270 | } | |
3271 | ||
3272 | part = find_part(m, start, nbytes, (void**) &q); | |
5f7e8903 | 3273 | if (!part || (nbytes > 0 && !q)) |
bc7fd8cd LP |
3274 | return -EBADMSG; |
3275 | ||
3276 | *rindex = end; | |
3277 | ||
3278 | if (ret) | |
3279 | *ret = q; | |
3280 | ||
18f5b48f | 3281 | return 0; |
9a17484d | 3282 | } |
de1c301e | 3283 | |
ac89bf1d | 3284 | static bool validate_nul(const char *s, size_t l) { |
de1c301e | 3285 | |
9a17484d LP |
3286 | /* Check for NUL chars in the string */ |
3287 | if (memchr(s, 0, l)) | |
3288 | return false; | |
de1c301e | 3289 | |
9a17484d LP |
3290 | /* Check for NUL termination */ |
3291 | if (s[l] != 0) | |
3292 | return false; | |
de1c301e | 3293 | |
ac89bf1d LP |
3294 | return true; |
3295 | } | |
3296 | ||
3297 | static bool validate_string(const char *s, size_t l) { | |
3298 | ||
3299 | if (!validate_nul(s, l)) | |
3300 | return false; | |
3301 | ||
9a17484d LP |
3302 | /* Check if valid UTF8 */ |
3303 | if (!utf8_is_valid(s)) | |
3304 | return false; | |
3305 | ||
3306 | return true; | |
de1c301e LP |
3307 | } |
3308 | ||
9a17484d | 3309 | static bool validate_signature(const char *s, size_t l) { |
de1c301e | 3310 | |
ac89bf1d | 3311 | if (!validate_nul(s, l)) |
9a17484d | 3312 | return false; |
de1c301e | 3313 | |
9a17484d LP |
3314 | /* Check if valid signature */ |
3315 | if (!signature_is_valid(s, true)) | |
3316 | return false; | |
3317 | ||
3318 | return true; | |
3319 | } | |
3320 | ||
ac89bf1d LP |
3321 | static bool validate_object_path(const char *s, size_t l) { |
3322 | ||
3323 | if (!validate_nul(s, l)) | |
3324 | return false; | |
3325 | ||
3326 | if (!object_path_is_valid(s)) | |
3327 | return false; | |
3328 | ||
3329 | return true; | |
3330 | } | |
3331 | ||
d9f644e2 | 3332 | _public_ int sd_bus_message_read_basic(sd_bus_message *m, char type, void *p) { |
9a17484d | 3333 | struct bus_container *c; |
6647dc66 | 3334 | size_t rindex; |
9a17484d | 3335 | void *q; |
0dcd14b9 | 3336 | int r; |
9a17484d | 3337 | |
9d6c7c82 LP |
3338 | assert_return(m, -EINVAL); |
3339 | assert_return(m->sealed, -EPERM); | |
3340 | assert_return(bus_type_is_basic(type), -EINVAL); | |
de1c301e | 3341 | |
7b058942 | 3342 | if (message_end_of_signature(m)) |
430fb8fa | 3343 | return -ENXIO; |
9a17484d | 3344 | |
1daf8121 LP |
3345 | if (message_end_of_array(m, m->rindex)) |
3346 | return 0; | |
3347 | ||
7b058942 | 3348 | c = message_get_container(m); |
9a17484d LP |
3349 | if (c->signature[c->index] != type) |
3350 | return -ENXIO; | |
3351 | ||
6647dc66 | 3352 | rindex = m->rindex; |
9a17484d | 3353 | |
6647dc66 | 3354 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
9a17484d | 3355 | |
6647dc66 LP |
3356 | if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE)) { |
3357 | bool ok; | |
9a17484d | 3358 | |
6647dc66 | 3359 | r = message_peek_body(m, &rindex, 1, c->item_size, &q); |
18f5b48f | 3360 | if (r < 0) |
6647dc66 LP |
3361 | return r; |
3362 | ||
3363 | if (type == SD_BUS_TYPE_STRING) | |
3364 | ok = validate_string(q, c->item_size-1); | |
3365 | else if (type == SD_BUS_TYPE_OBJECT_PATH) | |
3366 | ok = validate_object_path(q, c->item_size-1); | |
3367 | else | |
3368 | ok = validate_signature(q, c->item_size-1); | |
9a17484d | 3369 | |
6647dc66 | 3370 | if (!ok) |
ac89bf1d | 3371 | return -EBADMSG; |
6647dc66 LP |
3372 | |
3373 | if (p) | |
3374 | *(const char**) p = q; | |
ac89bf1d | 3375 | } else { |
6647dc66 LP |
3376 | int sz, align; |
3377 | ||
3378 | sz = bus_gvariant_get_size(CHAR_TO_STR(type)); | |
3379 | assert(sz > 0); | |
3380 | if ((size_t) sz != c->item_size) | |
ac89bf1d | 3381 | return -EBADMSG; |
9a17484d | 3382 | |
6647dc66 LP |
3383 | align = bus_gvariant_get_alignment(CHAR_TO_STR(type)); |
3384 | assert(align > 0); | |
0dcd14b9 | 3385 | |
6647dc66 | 3386 | r = message_peek_body(m, &rindex, align, c->item_size, &q); |
18f5b48f | 3387 | if (r < 0) |
6647dc66 | 3388 | return r; |
de1c301e | 3389 | |
6647dc66 | 3390 | switch (type) { |
9a17484d | 3391 | |
6647dc66 LP |
3392 | case SD_BUS_TYPE_BYTE: |
3393 | if (p) | |
3394 | *(uint8_t*) p = *(uint8_t*) q; | |
3395 | break; | |
9a17484d | 3396 | |
6647dc66 LP |
3397 | case SD_BUS_TYPE_BOOLEAN: |
3398 | if (p) | |
3399 | *(int*) p = !!*(uint8_t*) q; | |
3400 | break; | |
9a17484d | 3401 | |
6647dc66 LP |
3402 | case SD_BUS_TYPE_INT16: |
3403 | case SD_BUS_TYPE_UINT16: | |
3404 | if (p) | |
3405 | *(uint16_t*) p = BUS_MESSAGE_BSWAP16(m, *(uint16_t*) q); | |
3406 | break; | |
3407 | ||
3408 | case SD_BUS_TYPE_INT32: | |
3409 | case SD_BUS_TYPE_UINT32: | |
3410 | if (p) | |
3411 | *(uint32_t*) p = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3412 | break; | |
9a17484d | 3413 | |
6647dc66 LP |
3414 | case SD_BUS_TYPE_INT64: |
3415 | case SD_BUS_TYPE_UINT64: | |
3416 | case SD_BUS_TYPE_DOUBLE: | |
3417 | if (p) | |
3418 | *(uint64_t*) p = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q); | |
3419 | break; | |
0dcd14b9 | 3420 | |
6647dc66 LP |
3421 | case SD_BUS_TYPE_UNIX_FD: { |
3422 | uint32_t j; | |
de1c301e | 3423 | |
6647dc66 LP |
3424 | j = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); |
3425 | if (j >= m->n_fds) | |
3426 | return -EBADMSG; | |
de1c301e | 3427 | |
6647dc66 LP |
3428 | if (p) |
3429 | *(int*) p = m->fds[j]; | |
de1c301e | 3430 | |
6647dc66 LP |
3431 | break; |
3432 | } | |
3433 | ||
3434 | default: | |
3435 | assert_not_reached("unexpected type"); | |
3436 | } | |
3437 | } | |
3438 | ||
3439 | r = container_next_item(m, c, &rindex); | |
3440 | if (r < 0) | |
9a17484d | 3441 | return r; |
6647dc66 | 3442 | } else { |
9a17484d | 3443 | |
6647dc66 LP |
3444 | if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH)) { |
3445 | uint32_t l; | |
3446 | bool ok; | |
9a17484d | 3447 | |
6647dc66 | 3448 | r = message_peek_body(m, &rindex, 4, 4, &q); |
18f5b48f | 3449 | if (r < 0) |
6647dc66 | 3450 | return r; |
9a17484d | 3451 | |
6647dc66 LP |
3452 | l = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); |
3453 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
3454 | if (r < 0) | |
3455 | return r; | |
9a17484d | 3456 | |
6647dc66 LP |
3457 | if (type == SD_BUS_TYPE_OBJECT_PATH) |
3458 | ok = validate_object_path(q, l); | |
3459 | else | |
3460 | ok = validate_string(q, l); | |
3461 | if (!ok) | |
3462 | return -EBADMSG; | |
9a17484d | 3463 | |
0dcd14b9 | 3464 | if (p) |
6647dc66 | 3465 | *(const char**) p = q; |
9a17484d | 3466 | |
6647dc66 LP |
3467 | } else if (type == SD_BUS_TYPE_SIGNATURE) { |
3468 | uint8_t l; | |
3469 | ||
3470 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
18f5b48f | 3471 | if (r < 0) |
6647dc66 LP |
3472 | return r; |
3473 | ||
3474 | l = *(uint8_t*) q; | |
3475 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
3476 | if (r < 0) | |
3477 | return r; | |
2c93b4ef | 3478 | |
6647dc66 | 3479 | if (!validate_signature(q, l)) |
2c93b4ef LP |
3480 | return -EBADMSG; |
3481 | ||
0dcd14b9 | 3482 | if (p) |
6647dc66 | 3483 | *(const char**) p = q; |
2c93b4ef | 3484 | |
6647dc66 LP |
3485 | } else { |
3486 | ssize_t sz, align; | |
9a17484d | 3487 | |
6647dc66 LP |
3488 | align = bus_type_get_alignment(type); |
3489 | assert(align > 0); | |
2c93b4ef | 3490 | |
6647dc66 LP |
3491 | sz = bus_type_get_size(type); |
3492 | assert(sz > 0); | |
3493 | ||
3494 | r = message_peek_body(m, &rindex, align, sz, &q); | |
18f5b48f | 3495 | if (r < 0) |
6647dc66 LP |
3496 | return r; |
3497 | ||
3498 | switch (type) { | |
3499 | ||
3500 | case SD_BUS_TYPE_BYTE: | |
3501 | if (p) | |
3502 | *(uint8_t*) p = *(uint8_t*) q; | |
3503 | break; | |
3504 | ||
3505 | case SD_BUS_TYPE_BOOLEAN: | |
3506 | if (p) | |
3507 | *(int*) p = !!*(uint32_t*) q; | |
3508 | break; | |
3509 | ||
3510 | case SD_BUS_TYPE_INT16: | |
3511 | case SD_BUS_TYPE_UINT16: | |
3512 | if (p) | |
3513 | *(uint16_t*) p = BUS_MESSAGE_BSWAP16(m, *(uint16_t*) q); | |
3514 | break; | |
3515 | ||
3516 | case SD_BUS_TYPE_INT32: | |
3517 | case SD_BUS_TYPE_UINT32: | |
3518 | if (p) | |
3519 | *(uint32_t*) p = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3520 | break; | |
3521 | ||
3522 | case SD_BUS_TYPE_INT64: | |
3523 | case SD_BUS_TYPE_UINT64: | |
3524 | case SD_BUS_TYPE_DOUBLE: | |
3525 | if (p) | |
3526 | *(uint64_t*) p = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q); | |
3527 | break; | |
3528 | ||
3529 | case SD_BUS_TYPE_UNIX_FD: { | |
3530 | uint32_t j; | |
3531 | ||
3532 | j = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3533 | if (j >= m->n_fds) | |
3534 | return -EBADMSG; | |
3535 | ||
3536 | if (p) | |
3537 | *(int*) p = m->fds[j]; | |
3538 | break; | |
3539 | } | |
3540 | ||
3541 | default: | |
3542 | assert_not_reached("Unknown basic type..."); | |
3543 | } | |
3544 | } | |
9a17484d LP |
3545 | } |
3546 | ||
6647dc66 LP |
3547 | m->rindex = rindex; |
3548 | ||
9a17484d LP |
3549 | if (c->enclosing != SD_BUS_TYPE_ARRAY) |
3550 | c->index++; | |
3551 | ||
3552 | return 1; | |
de1c301e LP |
3553 | } |
3554 | ||
9a17484d LP |
3555 | static int bus_message_enter_array( |
3556 | sd_bus_message *m, | |
3557 | struct bus_container *c, | |
3558 | const char *contents, | |
6647dc66 LP |
3559 | uint32_t **array_size, |
3560 | size_t *item_size, | |
3561 | size_t **offsets, | |
3562 | size_t *n_offsets) { | |
9a17484d LP |
3563 | |
3564 | size_t rindex; | |
3565 | void *q; | |
3566 | int r, alignment; | |
3567 | ||
3568 | assert(m); | |
3569 | assert(c); | |
3570 | assert(contents); | |
3571 | assert(array_size); | |
6647dc66 LP |
3572 | assert(item_size); |
3573 | assert(offsets); | |
3574 | assert(n_offsets); | |
9a17484d | 3575 | |
29ddb38f | 3576 | if (!signature_is_single(contents, true)) |
de1c301e | 3577 | return -EINVAL; |
9a17484d | 3578 | |
9a17484d | 3579 | if (!c->signature || c->signature[c->index] == 0) |
6647dc66 | 3580 | return -ENXIO; |
9a17484d LP |
3581 | |
3582 | if (c->signature[c->index] != SD_BUS_TYPE_ARRAY) | |
3583 | return -ENXIO; | |
3584 | ||
3585 | if (!startswith(c->signature + c->index + 1, contents)) | |
3586 | return -ENXIO; | |
3587 | ||
3588 | rindex = m->rindex; | |
9a17484d | 3589 | |
6647dc66 LP |
3590 | if (!BUS_MESSAGE_IS_GVARIANT(m)) { |
3591 | /* dbus1 */ | |
9a17484d | 3592 | |
6647dc66 | 3593 | r = message_peek_body(m, &rindex, 4, 4, &q); |
18f5b48f | 3594 | if (r < 0) |
6647dc66 | 3595 | return r; |
9a17484d | 3596 | |
6647dc66 LP |
3597 | if (BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q) > BUS_ARRAY_MAX_SIZE) |
3598 | return -EBADMSG; | |
9a17484d | 3599 | |
6647dc66 LP |
3600 | alignment = bus_type_get_alignment(contents[0]); |
3601 | if (alignment < 0) | |
3602 | return alignment; | |
3603 | ||
3604 | r = message_peek_body(m, &rindex, alignment, 0, NULL); | |
3605 | if (r < 0) | |
3606 | return r; | |
6647dc66 LP |
3607 | |
3608 | *array_size = (uint32_t*) q; | |
3609 | ||
3610 | } else if (c->item_size <= 0) { | |
3611 | ||
3612 | /* gvariant: empty array */ | |
3613 | *item_size = 0; | |
3614 | *offsets = NULL; | |
3615 | *n_offsets = 0; | |
3616 | ||
3617 | } else if (bus_gvariant_is_fixed_size(contents)) { | |
3618 | ||
3619 | /* gvariant: fixed length array */ | |
3620 | *item_size = bus_gvariant_get_size(contents); | |
3621 | *offsets = NULL; | |
3622 | *n_offsets = 0; | |
3623 | ||
3624 | } else { | |
3625 | size_t where, p = 0, framing, sz; | |
3626 | unsigned i; | |
3627 | ||
3628 | /* gvariant: variable length array */ | |
2ac7c17f | 3629 | sz = bus_gvariant_determine_word_size(c->item_size, 0); |
6647dc66 LP |
3630 | |
3631 | where = rindex + c->item_size - sz; | |
3632 | r = message_peek_body(m, &where, 1, sz, &q); | |
3633 | if (r < 0) | |
3634 | return r; | |
6647dc66 | 3635 | |
2ac7c17f | 3636 | framing = bus_gvariant_read_word_le(q, sz); |
6647dc66 LP |
3637 | if (framing > c->item_size - sz) |
3638 | return -EBADMSG; | |
3639 | if ((c->item_size - framing) % sz != 0) | |
3640 | return -EBADMSG; | |
3641 | ||
3642 | *n_offsets = (c->item_size - framing) / sz; | |
3643 | ||
3644 | where = rindex + framing; | |
3645 | r = message_peek_body(m, &where, 1, *n_offsets * sz, &q); | |
3646 | if (r < 0) | |
3647 | return r; | |
6647dc66 LP |
3648 | |
3649 | *offsets = new(size_t, *n_offsets); | |
3650 | if (!*offsets) | |
3651 | return -ENOMEM; | |
3652 | ||
3653 | for (i = 0; i < *n_offsets; i++) { | |
3654 | size_t x; | |
3655 | ||
2ac7c17f | 3656 | x = bus_gvariant_read_word_le((uint8_t*) q + i * sz, sz); |
6647dc66 LP |
3657 | if (x > c->item_size - sz) |
3658 | return -EBADMSG; | |
3659 | if (x < p) | |
3660 | return -EBADMSG; | |
3661 | ||
3662 | (*offsets)[i] = rindex + x; | |
3663 | p = x; | |
3664 | } | |
3665 | ||
3666 | *item_size = (*offsets)[0] - rindex; | |
3667 | } | |
3668 | ||
3669 | m->rindex = rindex; | |
3670 | ||
3671 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3672 | c->index += 1 + strlen(contents); | |
9a17484d LP |
3673 | |
3674 | return 1; | |
3675 | } | |
3676 | ||
3677 | static int bus_message_enter_variant( | |
3678 | sd_bus_message *m, | |
3679 | struct bus_container *c, | |
6647dc66 LP |
3680 | const char *contents, |
3681 | size_t *item_size) { | |
9a17484d LP |
3682 | |
3683 | size_t rindex; | |
3684 | uint8_t l; | |
3685 | void *q; | |
3686 | int r; | |
3687 | ||
3688 | assert(m); | |
3689 | assert(c); | |
3690 | assert(contents); | |
6647dc66 | 3691 | assert(item_size); |
9a17484d | 3692 | |
29ddb38f | 3693 | if (!signature_is_single(contents, false)) |
de1c301e | 3694 | return -EINVAL; |
de1c301e | 3695 | |
9a17484d LP |
3696 | if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN) |
3697 | return -EINVAL; | |
3698 | ||
3699 | if (!c->signature || c->signature[c->index] == 0) | |
6647dc66 | 3700 | return -ENXIO; |
9a17484d LP |
3701 | |
3702 | if (c->signature[c->index] != SD_BUS_TYPE_VARIANT) | |
3703 | return -ENXIO; | |
3704 | ||
3705 | rindex = m->rindex; | |
9a17484d | 3706 | |
6647dc66 LP |
3707 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
3708 | size_t k, where; | |
3709 | ||
3710 | k = strlen(contents); | |
3711 | if (1+k > c->item_size) | |
3712 | return -EBADMSG; | |
3713 | ||
3714 | where = rindex + c->item_size - (1+k); | |
3715 | r = message_peek_body(m, &where, 1, 1+k, &q); | |
3716 | if (r < 0) | |
3717 | return r; | |
6647dc66 LP |
3718 | |
3719 | if (*(char*) q != 0) | |
3720 | return -EBADMSG; | |
3721 | ||
3722 | if (memcmp((uint8_t*) q+1, contents, k)) | |
3723 | return -ENXIO; | |
3724 | ||
3725 | *item_size = c->item_size - (1+k); | |
3726 | ||
3727 | } else { | |
3728 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
3729 | if (r < 0) | |
3730 | return r; | |
6647dc66 LP |
3731 | |
3732 | l = *(uint8_t*) q; | |
3733 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
3734 | if (r < 0) | |
3735 | return r; | |
6647dc66 LP |
3736 | |
3737 | if (!validate_signature(q, l)) | |
3738 | return -EBADMSG; | |
3739 | ||
3740 | if (!streq(q, contents)) | |
3741 | return -ENXIO; | |
3742 | } | |
3743 | ||
3744 | m->rindex = rindex; | |
3745 | ||
3746 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3747 | c->index++; | |
3748 | ||
3749 | return 1; | |
3750 | } | |
3751 | ||
3752 | static int build_struct_offsets( | |
3753 | sd_bus_message *m, | |
3754 | const char *signature, | |
3755 | size_t size, | |
3756 | size_t *item_size, | |
3757 | size_t **offsets, | |
3758 | size_t *n_offsets) { | |
3759 | ||
3760 | unsigned n_variable = 0, n_total = 0, v; | |
3761 | size_t previous = 0, where; | |
3762 | const char *p; | |
3763 | size_t sz; | |
3764 | void *q; | |
3765 | int r; | |
3766 | ||
3767 | assert(m); | |
6647dc66 LP |
3768 | assert(item_size); |
3769 | assert(offsets); | |
3770 | assert(n_offsets); | |
3771 | ||
d6385068 | 3772 | if (isempty(signature)) { |
e53d21d0 DH |
3773 | /* Unary type is encoded as *fixed* 1 byte padding */ |
3774 | r = message_peek_body(m, &m->rindex, 1, 1, &q); | |
3775 | if (r < 0) | |
3776 | return r; | |
3777 | ||
3778 | if (*(uint8_t *) q != 0) | |
3779 | return -EBADMSG; | |
3780 | ||
d6385068 LP |
3781 | *item_size = 0; |
3782 | *offsets = NULL; | |
3783 | *n_offsets = 0; | |
3784 | return 0; | |
3785 | } | |
3786 | ||
2ac7c17f | 3787 | sz = bus_gvariant_determine_word_size(size, 0); |
d6385068 LP |
3788 | if (sz <= 0) |
3789 | return -EBADMSG; | |
6647dc66 LP |
3790 | |
3791 | /* First, loop over signature and count variable elements and | |
3792 | * elements in general. We use this to know how large the | |
3793 | * offset array is at the end of the structure. Note that | |
3794 | * GVariant only stores offsets for all variable size elements | |
3795 | * that are not the last item. */ | |
3796 | ||
3797 | p = signature; | |
3798 | while (*p != 0) { | |
3799 | size_t n; | |
3800 | ||
3801 | r = signature_element_length(p, &n); | |
3802 | if (r < 0) | |
3803 | return r; | |
3804 | else { | |
3805 | char t[n+1]; | |
3806 | ||
3807 | memcpy(t, p, n); | |
3808 | t[n] = 0; | |
3809 | ||
3810 | r = bus_gvariant_is_fixed_size(t); | |
3811 | } | |
3812 | ||
3813 | if (r < 0) | |
3814 | return r; | |
3815 | if (r == 0 && p[n] != 0) /* except the last item */ | |
313cefa1 | 3816 | n_variable++; |
6647dc66 LP |
3817 | n_total++; |
3818 | ||
3819 | p += n; | |
3820 | } | |
3821 | ||
3822 | if (size < n_variable * sz) | |
3823 | return -EBADMSG; | |
3824 | ||
3825 | where = m->rindex + size - (n_variable * sz); | |
3826 | r = message_peek_body(m, &where, 1, n_variable * sz, &q); | |
9a17484d LP |
3827 | if (r < 0) |
3828 | return r; | |
9a17484d | 3829 | |
6647dc66 | 3830 | v = n_variable; |
9a17484d | 3831 | |
6647dc66 LP |
3832 | *offsets = new(size_t, n_total); |
3833 | if (!*offsets) | |
3834 | return -ENOMEM; | |
9a17484d | 3835 | |
6647dc66 | 3836 | *n_offsets = 0; |
9a17484d | 3837 | |
6647dc66 LP |
3838 | /* Second, loop again and build an offset table */ |
3839 | p = signature; | |
3840 | while (*p != 0) { | |
3841 | size_t n, offset; | |
3842 | int k; | |
9a17484d | 3843 | |
6647dc66 LP |
3844 | r = signature_element_length(p, &n); |
3845 | if (r < 0) | |
3846 | return r; | |
3847 | else { | |
3848 | char t[n+1]; | |
3849 | ||
3850 | memcpy(t, p, n); | |
3851 | t[n] = 0; | |
3852 | ||
3853 | k = bus_gvariant_get_size(t); | |
3854 | if (k < 0) { | |
3855 | size_t x; | |
3856 | ||
3857 | /* variable size */ | |
3858 | if (v > 0) { | |
3859 | v--; | |
3860 | ||
2ac7c17f | 3861 | x = bus_gvariant_read_word_le((uint8_t*) q + v*sz, sz); |
6647dc66 LP |
3862 | if (x >= size) |
3863 | return -EBADMSG; | |
3864 | if (m->rindex + x < previous) | |
3865 | return -EBADMSG; | |
3866 | } else | |
3867 | /* The last item's end | |
3868 | * is determined from | |
3869 | * the start of the | |
3870 | * offset array */ | |
3871 | x = size - (n_variable * sz); | |
3872 | ||
3873 | offset = m->rindex + x; | |
3874 | ||
3875 | } else { | |
3876 | size_t align; | |
3877 | ||
3878 | /* fixed size */ | |
3879 | align = bus_gvariant_get_alignment(t); | |
3880 | assert(align > 0); | |
3881 | ||
3882 | offset = (*n_offsets == 0 ? m->rindex : ALIGN_TO((*offsets)[*n_offsets-1], align)) + k; | |
3883 | } | |
3884 | } | |
3885 | ||
3886 | previous = (*offsets)[(*n_offsets)++] = offset; | |
3887 | p += n; | |
3888 | } | |
3889 | ||
3890 | assert(v == 0); | |
3891 | assert(*n_offsets == n_total); | |
3892 | ||
3893 | *item_size = (*offsets)[0] - m->rindex; | |
3894 | return 0; | |
3895 | } | |
3896 | ||
3897 | static int enter_struct_or_dict_entry( | |
3898 | sd_bus_message *m, | |
3899 | struct bus_container *c, | |
3900 | const char *contents, | |
3901 | size_t *item_size, | |
3902 | size_t **offsets, | |
3903 | size_t *n_offsets) { | |
3904 | ||
3905 | int r; | |
3906 | ||
3907 | assert(m); | |
3908 | assert(c); | |
3909 | assert(contents); | |
3910 | assert(item_size); | |
3911 | assert(offsets); | |
3912 | assert(n_offsets); | |
3913 | ||
3914 | if (!BUS_MESSAGE_IS_GVARIANT(m)) { | |
3915 | ||
3916 | /* dbus1 */ | |
3917 | r = message_peek_body(m, &m->rindex, 8, 0, NULL); | |
18f5b48f | 3918 | if (r < 0) |
6647dc66 LP |
3919 | return r; |
3920 | ||
6647dc66 LP |
3921 | } else |
3922 | /* gvariant with contents */ | |
3923 | return build_struct_offsets(m, contents, c->item_size, item_size, offsets, n_offsets); | |
3924 | ||
3925 | return 0; | |
de1c301e LP |
3926 | } |
3927 | ||
9a17484d LP |
3928 | static int bus_message_enter_struct( |
3929 | sd_bus_message *m, | |
3930 | struct bus_container *c, | |
6647dc66 LP |
3931 | const char *contents, |
3932 | size_t *item_size, | |
3933 | size_t **offsets, | |
3934 | size_t *n_offsets) { | |
9a17484d LP |
3935 | |
3936 | size_t l; | |
3937 | int r; | |
3938 | ||
3939 | assert(m); | |
3940 | assert(c); | |
3941 | assert(contents); | |
6647dc66 LP |
3942 | assert(item_size); |
3943 | assert(offsets); | |
3944 | assert(n_offsets); | |
9a17484d LP |
3945 | |
3946 | if (!signature_is_valid(contents, false)) | |
3947 | return -EINVAL; | |
3948 | ||
3949 | if (!c->signature || c->signature[c->index] == 0) | |
6647dc66 | 3950 | return -ENXIO; |
9a17484d LP |
3951 | |
3952 | l = strlen(contents); | |
3953 | ||
3954 | if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN || | |
3955 | !startswith(c->signature + c->index + 1, contents) || | |
3956 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END) | |
3957 | return -ENXIO; | |
3958 | ||
6647dc66 LP |
3959 | r = enter_struct_or_dict_entry(m, c, contents, item_size, offsets, n_offsets); |
3960 | if (r < 0) | |
9a17484d LP |
3961 | return r; |
3962 | ||
3963 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3964 | c->index += 1 + l + 1; | |
3965 | ||
3966 | return 1; | |
3967 | } | |
3968 | ||
3969 | static int bus_message_enter_dict_entry( | |
3970 | sd_bus_message *m, | |
3971 | struct bus_container *c, | |
6647dc66 LP |
3972 | const char *contents, |
3973 | size_t *item_size, | |
3974 | size_t **offsets, | |
3975 | size_t *n_offsets) { | |
9a17484d LP |
3976 | |
3977 | size_t l; | |
3978 | int r; | |
3979 | ||
3980 | assert(m); | |
3981 | assert(c); | |
3982 | assert(contents); | |
3983 | ||
3984 | if (!signature_is_pair(contents)) | |
3985 | return -EINVAL; | |
3986 | ||
3987 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3988 | return -ENXIO; | |
3989 | ||
3990 | if (!c->signature || c->signature[c->index] == 0) | |
3991 | return 0; | |
3992 | ||
3993 | l = strlen(contents); | |
3994 | ||
3995 | if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN || | |
3996 | !startswith(c->signature + c->index + 1, contents) || | |
3997 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END) | |
3998 | return -ENXIO; | |
3999 | ||
6647dc66 LP |
4000 | r = enter_struct_or_dict_entry(m, c, contents, item_size, offsets, n_offsets); |
4001 | if (r < 0) | |
9a17484d LP |
4002 | return r; |
4003 | ||
4004 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
4005 | c->index += 1 + l + 1; | |
4006 | ||
4007 | return 1; | |
4008 | } | |
4009 | ||
d9f644e2 ZJS |
4010 | _public_ int sd_bus_message_enter_container(sd_bus_message *m, |
4011 | char type, | |
4012 | const char *contents) { | |
9a17484d LP |
4013 | struct bus_container *c, *w; |
4014 | uint32_t *array_size = NULL; | |
4015 | char *signature; | |
b3af9646 | 4016 | size_t before; |
6647dc66 LP |
4017 | size_t *offsets = NULL; |
4018 | size_t n_offsets = 0, item_size = 0; | |
9a17484d LP |
4019 | int r; |
4020 | ||
275b39fe LP |
4021 | assert_return(m, -EINVAL); |
4022 | assert_return(m->sealed, -EPERM); | |
4023 | assert_return(type != 0 || !contents, -EINVAL); | |
4024 | ||
4025 | if (type == 0 || !contents) { | |
4026 | const char *cc; | |
4027 | char tt; | |
4028 | ||
4029 | /* Allow entering into anonymous containers */ | |
4030 | r = sd_bus_message_peek_type(m, &tt, &cc); | |
18f5b48f | 4031 | if (r < 0) |
275b39fe LP |
4032 | return r; |
4033 | ||
4034 | if (type != 0 && type != tt) | |
4035 | return -ENXIO; | |
4036 | ||
4037 | if (contents && !streq(contents, cc)) | |
4038 | return -ENXIO; | |
4039 | ||
4040 | type = tt; | |
4041 | contents = cc; | |
4042 | } | |
9a17484d | 4043 | |
ed205a6b LP |
4044 | /* |
4045 | * We enforce a global limit on container depth, that is much | |
4046 | * higher than the 32 structs and 32 arrays the specification | |
4047 | * mandates. This is simpler to implement for us, and we need | |
4048 | * this only to ensure our container array doesn't grow | |
4049 | * without bounds. We are happy to return any data from a | |
4050 | * message as long as the data itself is valid, even if the | |
4051 | * overall message might be not. | |
4052 | * | |
4053 | * Note that the message signature is validated when | |
4054 | * parsing the headers, and that validation does check the | |
4055 | * 32/32 limit. | |
4056 | * | |
4057 | * Note that the specification defines no limits on the depth | |
4058 | * of stacked variants, but we do. | |
4059 | */ | |
4060 | if (m->n_containers >= BUS_CONTAINER_DEPTH) | |
4061 | return -EBADMSG; | |
4062 | ||
306f07be | 4063 | if (!GREEDY_REALLOC(m->containers, m->containers_allocated, m->n_containers + 1)) |
9a17484d | 4064 | return -ENOMEM; |
9a17484d | 4065 | |
7b058942 | 4066 | if (message_end_of_signature(m)) |
430fb8fa | 4067 | return -ENXIO; |
9a17484d | 4068 | |
1daf8121 LP |
4069 | if (message_end_of_array(m, m->rindex)) |
4070 | return 0; | |
4071 | ||
7b058942 LP |
4072 | c = message_get_container(m); |
4073 | ||
9a17484d LP |
4074 | signature = strdup(contents); |
4075 | if (!signature) | |
4076 | return -ENOMEM; | |
4077 | ||
b3af9646 LP |
4078 | c->saved_index = c->index; |
4079 | before = m->rindex; | |
4080 | ||
9a17484d | 4081 | if (type == SD_BUS_TYPE_ARRAY) |
6647dc66 | 4082 | r = bus_message_enter_array(m, c, contents, &array_size, &item_size, &offsets, &n_offsets); |
9a17484d | 4083 | else if (type == SD_BUS_TYPE_VARIANT) |
6647dc66 | 4084 | r = bus_message_enter_variant(m, c, contents, &item_size); |
9a17484d | 4085 | else if (type == SD_BUS_TYPE_STRUCT) |
6647dc66 | 4086 | r = bus_message_enter_struct(m, c, contents, &item_size, &offsets, &n_offsets); |
9a17484d | 4087 | else if (type == SD_BUS_TYPE_DICT_ENTRY) |
6647dc66 | 4088 | r = bus_message_enter_dict_entry(m, c, contents, &item_size, &offsets, &n_offsets); |
9a17484d LP |
4089 | else |
4090 | r = -EINVAL; | |
4091 | ||
4092 | if (r <= 0) { | |
4093 | free(signature); | |
6647dc66 | 4094 | free(offsets); |
9a17484d LP |
4095 | return r; |
4096 | } | |
4097 | ||
4098 | /* OK, let's fill it in */ | |
306f07be | 4099 | w = m->containers + m->n_containers++; |
9a17484d LP |
4100 | w->enclosing = type; |
4101 | w->signature = signature; | |
3798fd4c | 4102 | w->peeked_signature = NULL; |
9a17484d | 4103 | w->index = 0; |
6647dc66 | 4104 | |
b3af9646 | 4105 | w->before = before; |
9a17484d | 4106 | w->begin = m->rindex; |
e53d21d0 DH |
4107 | |
4108 | /* Unary type has fixed size of 1, but virtual size of 0 */ | |
4109 | if (BUS_MESSAGE_IS_GVARIANT(m) && | |
4110 | type == SD_BUS_TYPE_STRUCT && | |
4111 | isempty(signature)) | |
4112 | w->end = m->rindex + 0; | |
4113 | else | |
4114 | w->end = m->rindex + c->item_size; | |
6647dc66 LP |
4115 | |
4116 | w->array_size = array_size; | |
4117 | w->item_size = item_size; | |
4118 | w->offsets = offsets; | |
4119 | w->n_offsets = n_offsets; | |
4120 | w->offset_index = 0; | |
9a17484d LP |
4121 | |
4122 | return 1; | |
4123 | } | |
4124 | ||
d9f644e2 | 4125 | _public_ int sd_bus_message_exit_container(sd_bus_message *m) { |
9a17484d | 4126 | struct bus_container *c; |
5763192a | 4127 | unsigned saved; |
6647dc66 | 4128 | int r; |
9a17484d | 4129 | |
9d6c7c82 LP |
4130 | assert_return(m, -EINVAL); |
4131 | assert_return(m->sealed, -EPERM); | |
f959af20 | 4132 | assert_return(m->n_containers > 0, -ENXIO); |
9a17484d LP |
4133 | |
4134 | c = message_get_container(m); | |
6647dc66 LP |
4135 | |
4136 | if (c->enclosing != SD_BUS_TYPE_ARRAY) { | |
4137 | if (c->signature && c->signature[c->index] != 0) | |
4138 | return -EBUSY; | |
4139 | } | |
4140 | ||
4141 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
4142 | if (m->rindex < c->end) | |
4143 | return -EBUSY; | |
4144 | ||
4145 | } else if (c->enclosing == SD_BUS_TYPE_ARRAY) { | |
9a17484d LP |
4146 | uint32_t l; |
4147 | ||
4148 | l = BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
4149 | if (c->begin + l != m->rindex) | |
4150 | return -EBUSY; | |
9a17484d LP |
4151 | } |
4152 | ||
4153 | free(c->signature); | |
3798fd4c | 4154 | free(c->peeked_signature); |
6647dc66 | 4155 | free(c->offsets); |
9a17484d LP |
4156 | m->n_containers--; |
4157 | ||
6647dc66 LP |
4158 | c = message_get_container(m); |
4159 | ||
5763192a LP |
4160 | saved = c->index; |
4161 | c->index = c->saved_index; | |
6647dc66 | 4162 | r = container_next_item(m, c, &m->rindex); |
5763192a | 4163 | c->index = saved; |
6647dc66 LP |
4164 | if (r < 0) |
4165 | return r; | |
4166 | ||
9a17484d LP |
4167 | return 1; |
4168 | } | |
4169 | ||
b3af9646 LP |
4170 | static void message_quit_container(sd_bus_message *m) { |
4171 | struct bus_container *c; | |
4172 | ||
4173 | assert(m); | |
4174 | assert(m->sealed); | |
4175 | assert(m->n_containers > 0); | |
4176 | ||
4177 | c = message_get_container(m); | |
4178 | ||
4179 | /* Undo seeks */ | |
4180 | assert(m->rindex >= c->before); | |
4181 | m->rindex = c->before; | |
4182 | ||
4183 | /* Free container */ | |
4184 | free(c->signature); | |
6647dc66 | 4185 | free(c->offsets); |
b3af9646 LP |
4186 | m->n_containers--; |
4187 | ||
4188 | /* Correct index of new top-level container */ | |
4189 | c = message_get_container(m); | |
4190 | c->index = c->saved_index; | |
4191 | } | |
4192 | ||
d9f644e2 | 4193 | _public_ int sd_bus_message_peek_type(sd_bus_message *m, char *type, const char **contents) { |
9a17484d LP |
4194 | struct bus_container *c; |
4195 | int r; | |
4196 | ||
c430fee6 LP |
4197 | assert_return(m, -EINVAL); |
4198 | assert_return(m->sealed, -EPERM); | |
9a17484d | 4199 | |
7b058942 | 4200 | if (message_end_of_signature(m)) |
9a17484d LP |
4201 | goto eof; |
4202 | ||
4203 | if (message_end_of_array(m, m->rindex)) | |
4204 | goto eof; | |
4205 | ||
7b058942 LP |
4206 | c = message_get_container(m); |
4207 | ||
9a17484d LP |
4208 | if (bus_type_is_basic(c->signature[c->index])) { |
4209 | if (contents) | |
4210 | *contents = NULL; | |
4211 | if (type) | |
4212 | *type = c->signature[c->index]; | |
4213 | return 1; | |
4214 | } | |
4215 | ||
4216 | if (c->signature[c->index] == SD_BUS_TYPE_ARRAY) { | |
4217 | ||
4218 | if (contents) { | |
4219 | size_t l; | |
4220 | char *sig; | |
4221 | ||
4222 | r = signature_element_length(c->signature+c->index+1, &l); | |
4223 | if (r < 0) | |
4224 | return r; | |
4225 | ||
80a46c73 LP |
4226 | assert(l >= 1); |
4227 | ||
9a17484d LP |
4228 | sig = strndup(c->signature + c->index + 1, l); |
4229 | if (!sig) | |
4230 | return -ENOMEM; | |
4231 | ||
3798fd4c LP |
4232 | free(c->peeked_signature); |
4233 | *contents = c->peeked_signature = sig; | |
9a17484d LP |
4234 | } |
4235 | ||
4236 | if (type) | |
4237 | *type = SD_BUS_TYPE_ARRAY; | |
4238 | ||
4239 | return 1; | |
4240 | } | |
4241 | ||
4c701096 | 4242 | if (IN_SET(c->signature[c->index], SD_BUS_TYPE_STRUCT_BEGIN, SD_BUS_TYPE_DICT_ENTRY_BEGIN)) { |
9a17484d LP |
4243 | |
4244 | if (contents) { | |
4245 | size_t l; | |
4246 | char *sig; | |
4247 | ||
4248 | r = signature_element_length(c->signature+c->index, &l); | |
4249 | if (r < 0) | |
4250 | return r; | |
4251 | ||
4252 | assert(l >= 2); | |
4253 | sig = strndup(c->signature + c->index + 1, l - 2); | |
4254 | if (!sig) | |
4255 | return -ENOMEM; | |
4256 | ||
3798fd4c LP |
4257 | free(c->peeked_signature); |
4258 | *contents = c->peeked_signature = sig; | |
9a17484d LP |
4259 | } |
4260 | ||
4261 | if (type) | |
4262 | *type = c->signature[c->index] == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY; | |
4263 | ||
4264 | return 1; | |
4265 | } | |
4266 | ||
4267 | if (c->signature[c->index] == SD_BUS_TYPE_VARIANT) { | |
4268 | if (contents) { | |
9a17484d LP |
4269 | void *q; |
4270 | ||
6647dc66 LP |
4271 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
4272 | size_t k; | |
9a17484d | 4273 | |
6647dc66 LP |
4274 | if (c->item_size < 2) |
4275 | return -EBADMSG; | |
9a17484d | 4276 | |
6647dc66 LP |
4277 | /* Look for the NUL delimiter that |
4278 | separates the payload from the | |
4279 | signature. Since the body might be | |
4280 | in a different part that then the | |
4281 | signature we map byte by byte. */ | |
4282 | ||
4283 | for (k = 2; k <= c->item_size; k++) { | |
4284 | size_t where; | |
4285 | ||
4286 | where = m->rindex + c->item_size - k; | |
4287 | r = message_peek_body(m, &where, 1, k, &q); | |
4288 | if (r < 0) | |
4289 | return r; | |
6647dc66 LP |
4290 | |
4291 | if (*(char*) q == 0) | |
4292 | break; | |
4293 | } | |
4294 | ||
4295 | if (k > c->item_size) | |
4296 | return -EBADMSG; | |
4297 | ||
3798fd4c LP |
4298 | free(c->peeked_signature); |
4299 | c->peeked_signature = strndup((char*) q + 1, k - 1); | |
4300 | if (!c->peeked_signature) | |
6647dc66 LP |
4301 | return -ENOMEM; |
4302 | ||
3798fd4c | 4303 | if (!signature_is_valid(c->peeked_signature, true)) |
6647dc66 LP |
4304 | return -EBADMSG; |
4305 | ||
3798fd4c | 4306 | *contents = c->peeked_signature; |
6647dc66 LP |
4307 | } else { |
4308 | size_t rindex, l; | |
4309 | ||
4310 | rindex = m->rindex; | |
4311 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
4312 | if (r < 0) | |
4313 | return r; | |
9a17484d | 4314 | |
6647dc66 LP |
4315 | l = *(uint8_t*) q; |
4316 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
4317 | if (r < 0) | |
4318 | return r; | |
6647dc66 LP |
4319 | |
4320 | if (!validate_signature(q, l)) | |
4321 | return -EBADMSG; | |
4322 | ||
4323 | *contents = q; | |
4324 | } | |
9a17484d LP |
4325 | } |
4326 | ||
4327 | if (type) | |
4328 | *type = SD_BUS_TYPE_VARIANT; | |
4329 | ||
4330 | return 1; | |
4331 | } | |
4332 | ||
4333 | return -EINVAL; | |
4334 | ||
4335 | eof: | |
4336 | if (type) | |
7b058942 | 4337 | *type = 0; |
9a17484d LP |
4338 | if (contents) |
4339 | *contents = NULL; | |
4340 | return 0; | |
4341 | } | |
4342 | ||
d9f644e2 | 4343 | _public_ int sd_bus_message_rewind(sd_bus_message *m, int complete) { |
9a17484d LP |
4344 | struct bus_container *c; |
4345 | ||
9d6c7c82 LP |
4346 | assert_return(m, -EINVAL); |
4347 | assert_return(m->sealed, -EPERM); | |
9a17484d LP |
4348 | |
4349 | if (complete) { | |
bc7fd8cd | 4350 | message_reset_containers(m); |
9a17484d | 4351 | m->rindex = 0; |
9a17484d LP |
4352 | |
4353 | c = message_get_container(m); | |
4354 | } else { | |
4355 | c = message_get_container(m); | |
4356 | ||
6647dc66 | 4357 | c->offset_index = 0; |
9a17484d LP |
4358 | c->index = 0; |
4359 | m->rindex = c->begin; | |
4360 | } | |
4361 | ||
d36b7031 | 4362 | c->offset_index = 0; |
e4bb80a0 | 4363 | c->item_size = (c->n_offsets > 0 ? c->offsets[0] : c->end) - c->begin; |
d36b7031 | 4364 | |
9a17484d LP |
4365 | return !isempty(c->signature); |
4366 | } | |
718db961 | 4367 | |
1b492614 LP |
4368 | static int message_read_ap( |
4369 | sd_bus_message *m, | |
4370 | const char *types, | |
4371 | va_list ap) { | |
9a17484d | 4372 | |
fe1d424d LP |
4373 | unsigned n_array, n_struct; |
4374 | TypeStack stack[BUS_CONTAINER_DEPTH]; | |
4375 | unsigned stack_ptr = 0; | |
430fb8fa | 4376 | unsigned n_loop = 0; |
9a17484d LP |
4377 | int r; |
4378 | ||
4379 | assert(m); | |
1b492614 | 4380 | |
430fb8fa | 4381 | if (isempty(types)) |
1b492614 | 4382 | return 0; |
9a17484d | 4383 | |
fe1d424d LP |
4384 | /* Ideally, we'd just call ourselves recursively on every |
4385 | * complex type. However, the state of a va_list that is | |
4386 | * passed to a function is undefined after that function | |
4387 | * returns. This means we need to docode the va_list linearly | |
4388 | * in a single stackframe. We hence implement our own | |
4389 | * home-grown stack in an array. */ | |
4390 | ||
6f285378 | 4391 | n_array = (unsigned) -1; /* length of current array entries */ |
430fb8fa | 4392 | n_struct = strlen(types); /* length of current struct contents signature */ |
fe1d424d LP |
4393 | |
4394 | for (;;) { | |
4395 | const char *t; | |
4396 | ||
430fb8fa LP |
4397 | n_loop++; |
4398 | ||
1b492614 | 4399 | if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) { |
fe1d424d LP |
4400 | r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array); |
4401 | if (r < 0) | |
4402 | return r; | |
4403 | if (r == 0) | |
4404 | break; | |
4405 | ||
4406 | r = sd_bus_message_exit_container(m); | |
4407 | if (r < 0) | |
4408 | return r; | |
4409 | ||
4410 | continue; | |
4411 | } | |
4412 | ||
4413 | t = types; | |
4414 | if (n_array != (unsigned) -1) | |
313cefa1 | 4415 | n_array--; |
fe1d424d | 4416 | else { |
313cefa1 | 4417 | types++; |
fe1d424d LP |
4418 | n_struct--; |
4419 | } | |
4420 | ||
9a17484d LP |
4421 | switch (*t) { |
4422 | ||
4423 | case SD_BUS_TYPE_BYTE: | |
4424 | case SD_BUS_TYPE_BOOLEAN: | |
4425 | case SD_BUS_TYPE_INT16: | |
4426 | case SD_BUS_TYPE_UINT16: | |
4427 | case SD_BUS_TYPE_INT32: | |
4428 | case SD_BUS_TYPE_UINT32: | |
4429 | case SD_BUS_TYPE_INT64: | |
4430 | case SD_BUS_TYPE_UINT64: | |
4431 | case SD_BUS_TYPE_DOUBLE: | |
4432 | case SD_BUS_TYPE_STRING: | |
4433 | case SD_BUS_TYPE_OBJECT_PATH: | |
2c93b4ef LP |
4434 | case SD_BUS_TYPE_SIGNATURE: |
4435 | case SD_BUS_TYPE_UNIX_FD: { | |
9a17484d LP |
4436 | void *p; |
4437 | ||
4438 | p = va_arg(ap, void*); | |
4439 | r = sd_bus_message_read_basic(m, *t, p); | |
fe1d424d LP |
4440 | if (r < 0) |
4441 | return r; | |
430fb8fa LP |
4442 | if (r == 0) { |
4443 | if (n_loop <= 1) | |
4444 | return 0; | |
4445 | ||
fe1d424d | 4446 | return -ENXIO; |
430fb8fa | 4447 | } |
fe1d424d | 4448 | |
9a17484d LP |
4449 | break; |
4450 | } | |
4451 | ||
4452 | case SD_BUS_TYPE_ARRAY: { | |
4453 | size_t k; | |
4454 | ||
4455 | r = signature_element_length(t + 1, &k); | |
4456 | if (r < 0) | |
4457 | return r; | |
4458 | ||
4459 | { | |
9a17484d | 4460 | char s[k + 1]; |
9a17484d LP |
4461 | memcpy(s, t + 1, k); |
4462 | s[k] = 0; | |
9a17484d LP |
4463 | |
4464 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s); | |
4465 | if (r < 0) | |
4466 | return r; | |
430fb8fa LP |
4467 | if (r == 0) { |
4468 | if (n_loop <= 1) | |
4469 | return 0; | |
4470 | ||
9a17484d | 4471 | return -ENXIO; |
430fb8fa | 4472 | } |
fe1d424d | 4473 | } |
9a17484d | 4474 | |
fe1d424d LP |
4475 | if (n_array == (unsigned) -1) { |
4476 | types += k; | |
4477 | n_struct -= k; | |
9a17484d LP |
4478 | } |
4479 | ||
fe1d424d LP |
4480 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
4481 | if (r < 0) | |
4482 | return r; | |
4483 | ||
4484 | types = t + 1; | |
4485 | n_struct = k; | |
4486 | n_array = va_arg(ap, unsigned); | |
4487 | ||
9a17484d LP |
4488 | break; |
4489 | } | |
4490 | ||
4491 | case SD_BUS_TYPE_VARIANT: { | |
4492 | const char *s; | |
4493 | ||
4494 | s = va_arg(ap, const char *); | |
4495 | if (!s) | |
4496 | return -EINVAL; | |
4497 | ||
4498 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, s); | |
4499 | if (r < 0) | |
4500 | return r; | |
430fb8fa LP |
4501 | if (r == 0) { |
4502 | if (n_loop <= 1) | |
4503 | return 0; | |
4504 | ||
9a17484d | 4505 | return -ENXIO; |
430fb8fa | 4506 | } |
9a17484d | 4507 | |
fe1d424d | 4508 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
9a17484d LP |
4509 | if (r < 0) |
4510 | return r; | |
9a17484d | 4511 | |
fe1d424d LP |
4512 | types = s; |
4513 | n_struct = strlen(s); | |
4514 | n_array = (unsigned) -1; | |
4515 | ||
9a17484d LP |
4516 | break; |
4517 | } | |
4518 | ||
4519 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
4520 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
4521 | size_t k; | |
4522 | ||
4523 | r = signature_element_length(t, &k); | |
4524 | if (r < 0) | |
4525 | return r; | |
4526 | ||
4527 | { | |
4528 | char s[k - 1]; | |
4529 | memcpy(s, t + 1, k - 2); | |
4530 | s[k - 2] = 0; | |
4531 | ||
4532 | r = sd_bus_message_enter_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
4533 | if (r < 0) | |
4534 | return r; | |
430fb8fa LP |
4535 | if (r == 0) { |
4536 | if (n_loop <= 1) | |
4537 | return 0; | |
9a17484d | 4538 | return -ENXIO; |
430fb8fa | 4539 | } |
fe1d424d | 4540 | } |
9a17484d | 4541 | |
fe1d424d LP |
4542 | if (n_array == (unsigned) -1) { |
4543 | types += k - 1; | |
4544 | n_struct -= k - 1; | |
4545 | } | |
9a17484d | 4546 | |
fe1d424d LP |
4547 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
4548 | if (r < 0) | |
4549 | return r; | |
9a17484d | 4550 | |
fe1d424d LP |
4551 | types = t + 1; |
4552 | n_struct = k - 2; | |
4553 | n_array = (unsigned) -1; | |
9a17484d LP |
4554 | |
4555 | break; | |
4556 | } | |
4557 | ||
4558 | default: | |
fe1d424d | 4559 | return -EINVAL; |
9a17484d | 4560 | } |
9a17484d LP |
4561 | } |
4562 | ||
4563 | return 1; | |
4564 | } | |
4565 | ||
d9f644e2 | 4566 | _public_ int sd_bus_message_read(sd_bus_message *m, const char *types, ...) { |
9a17484d LP |
4567 | va_list ap; |
4568 | int r; | |
4569 | ||
9b07511d LP |
4570 | assert_return(m, -EINVAL); |
4571 | assert_return(m->sealed, -EPERM); | |
4572 | assert_return(types, -EINVAL); | |
9a17484d LP |
4573 | |
4574 | va_start(ap, types); | |
4575 | r = message_read_ap(m, types, ap); | |
4576 | va_end(ap); | |
4577 | ||
4578 | return r; | |
4579 | } | |
4580 | ||
d9f644e2 | 4581 | _public_ int sd_bus_message_skip(sd_bus_message *m, const char *types) { |
9b07511d LP |
4582 | int r; |
4583 | ||
4584 | assert_return(m, -EINVAL); | |
4585 | assert_return(m->sealed, -EPERM); | |
9b07511d | 4586 | |
d9fba533 LP |
4587 | /* If types is NULL, read exactly one element */ |
4588 | if (!types) { | |
4589 | struct bus_container *c; | |
4590 | size_t l; | |
4591 | ||
4592 | if (message_end_of_signature(m)) | |
4593 | return -ENXIO; | |
4594 | ||
4595 | if (message_end_of_array(m, m->rindex)) | |
4596 | return 0; | |
4597 | ||
4598 | c = message_get_container(m); | |
4599 | ||
4600 | r = signature_element_length(c->signature + c->index, &l); | |
4601 | if (r < 0) | |
4602 | return r; | |
4603 | ||
4604 | types = strndupa(c->signature + c->index, l); | |
4605 | } | |
9b07511d LP |
4606 | |
4607 | switch (*types) { | |
4608 | ||
d9fba533 LP |
4609 | case 0: /* Nothing to drop */ |
4610 | return 0; | |
4611 | ||
9b07511d LP |
4612 | case SD_BUS_TYPE_BYTE: |
4613 | case SD_BUS_TYPE_BOOLEAN: | |
4614 | case SD_BUS_TYPE_INT16: | |
4615 | case SD_BUS_TYPE_UINT16: | |
4616 | case SD_BUS_TYPE_INT32: | |
4617 | case SD_BUS_TYPE_UINT32: | |
4618 | case SD_BUS_TYPE_INT64: | |
4619 | case SD_BUS_TYPE_UINT64: | |
4620 | case SD_BUS_TYPE_DOUBLE: | |
4621 | case SD_BUS_TYPE_STRING: | |
4622 | case SD_BUS_TYPE_OBJECT_PATH: | |
4623 | case SD_BUS_TYPE_SIGNATURE: | |
4624 | case SD_BUS_TYPE_UNIX_FD: | |
4625 | ||
4626 | r = sd_bus_message_read_basic(m, *types, NULL); | |
4627 | if (r <= 0) | |
4628 | return r; | |
4629 | ||
4630 | r = sd_bus_message_skip(m, types + 1); | |
4631 | if (r < 0) | |
4632 | return r; | |
4633 | ||
4634 | return 1; | |
4635 | ||
4636 | case SD_BUS_TYPE_ARRAY: { | |
4637 | size_t k; | |
4638 | ||
4639 | r = signature_element_length(types + 1, &k); | |
4640 | if (r < 0) | |
4641 | return r; | |
4642 | ||
4643 | { | |
4644 | char s[k+1]; | |
4645 | memcpy(s, types+1, k); | |
4646 | s[k] = 0; | |
4647 | ||
4648 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s); | |
4649 | if (r <= 0) | |
4650 | return r; | |
4651 | ||
4652 | for (;;) { | |
4653 | r = sd_bus_message_skip(m, s); | |
4654 | if (r < 0) | |
4655 | return r; | |
4656 | if (r == 0) | |
4657 | break; | |
4658 | } | |
4659 | ||
4660 | r = sd_bus_message_exit_container(m); | |
4661 | if (r < 0) | |
4662 | return r; | |
4663 | } | |
4664 | ||
4665 | r = sd_bus_message_skip(m, types + 1 + k); | |
4666 | if (r < 0) | |
4667 | return r; | |
4668 | ||
4669 | return 1; | |
4670 | } | |
4671 | ||
4672 | case SD_BUS_TYPE_VARIANT: { | |
4673 | const char *contents; | |
4674 | char x; | |
4675 | ||
4676 | r = sd_bus_message_peek_type(m, &x, &contents); | |
4677 | if (r <= 0) | |
4678 | return r; | |
4679 | ||
4680 | if (x != SD_BUS_TYPE_VARIANT) | |
4681 | return -ENXIO; | |
4682 | ||
4683 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents); | |
4684 | if (r <= 0) | |
4685 | return r; | |
4686 | ||
4687 | r = sd_bus_message_skip(m, contents); | |
4688 | if (r < 0) | |
4689 | return r; | |
4690 | assert(r != 0); | |
4691 | ||
4692 | r = sd_bus_message_exit_container(m); | |
4693 | if (r < 0) | |
4694 | return r; | |
4695 | ||
4696 | r = sd_bus_message_skip(m, types + 1); | |
4697 | if (r < 0) | |
4698 | return r; | |
4699 | ||
4700 | return 1; | |
4701 | } | |
4702 | ||
4703 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
4704 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
4705 | size_t k; | |
4706 | ||
4707 | r = signature_element_length(types, &k); | |
4708 | if (r < 0) | |
4709 | return r; | |
4710 | ||
4711 | { | |
4712 | char s[k-1]; | |
4713 | memcpy(s, types+1, k-2); | |
4714 | s[k-2] = 0; | |
4715 | ||
4716 | r = sd_bus_message_enter_container(m, *types == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
4717 | if (r <= 0) | |
4718 | return r; | |
4719 | ||
4720 | r = sd_bus_message_skip(m, s); | |
4721 | if (r < 0) | |
4722 | return r; | |
9b07511d LP |
4723 | |
4724 | r = sd_bus_message_exit_container(m); | |
4725 | if (r < 0) | |
4726 | return r; | |
4727 | } | |
4728 | ||
4729 | r = sd_bus_message_skip(m, types + k); | |
4730 | if (r < 0) | |
4731 | return r; | |
4732 | ||
4733 | return 1; | |
4734 | } | |
4735 | ||
4736 | default: | |
4737 | return -EINVAL; | |
4738 | } | |
4739 | } | |
4740 | ||
2ac7c17f LP |
4741 | _public_ int sd_bus_message_read_array( |
4742 | sd_bus_message *m, | |
4743 | char type, | |
4744 | const void **ptr, | |
4745 | size_t *size) { | |
4746 | ||
b3af9646 LP |
4747 | struct bus_container *c; |
4748 | void *p; | |
4749 | size_t sz; | |
4750 | ssize_t align; | |
4751 | int r; | |
4752 | ||
9d6c7c82 LP |
4753 | assert_return(m, -EINVAL); |
4754 | assert_return(m->sealed, -EPERM); | |
4755 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
4756 | assert_return(ptr, -EINVAL); | |
4757 | assert_return(size, -EINVAL); | |
15411c0c | 4758 | assert_return(!BUS_MESSAGE_NEED_BSWAP(m), -EOPNOTSUPP); |
b3af9646 | 4759 | |
b3af9646 | 4760 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); |
66b26c5c | 4761 | if (r <= 0) |
b3af9646 LP |
4762 | return r; |
4763 | ||
4764 | c = message_get_container(m); | |
6647dc66 LP |
4765 | |
4766 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
4767 | align = bus_gvariant_get_alignment(CHAR_TO_STR(type)); | |
4768 | if (align < 0) | |
4769 | return align; | |
4770 | ||
18f5b48f | 4771 | sz = c->end - c->begin; |
6647dc66 LP |
4772 | } else { |
4773 | align = bus_type_get_alignment(type); | |
4774 | if (align < 0) | |
4775 | return align; | |
4776 | ||
4777 | sz = BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
4778 | } | |
b3af9646 | 4779 | |
5e86fd7b LP |
4780 | if (sz == 0) |
4781 | /* Zero length array, let's return some aligned | |
4782 | * pointer that is not NULL */ | |
0241c1c0 | 4783 | p = (uint8_t*) align; |
5e86fd7b LP |
4784 | else { |
4785 | r = message_peek_body(m, &m->rindex, align, sz, &p); | |
4786 | if (r < 0) | |
4787 | goto fail; | |
b3af9646 LP |
4788 | } |
4789 | ||
4790 | r = sd_bus_message_exit_container(m); | |
4791 | if (r < 0) | |
4792 | goto fail; | |
4793 | ||
4794 | *ptr = (const void*) p; | |
4795 | *size = sz; | |
4796 | ||
4797 | return 1; | |
4798 | ||
4799 | fail: | |
4800 | message_quit_container(m); | |
4801 | return r; | |
4802 | } | |
4803 | ||
80a46c73 LP |
4804 | static int message_peek_fields( |
4805 | sd_bus_message *m, | |
4806 | size_t *rindex, | |
4807 | size_t align, | |
4808 | size_t nbytes, | |
4809 | void **ret) { | |
4810 | ||
4811 | assert(m); | |
4812 | assert(rindex); | |
4813 | assert(align > 0); | |
4814 | ||
2ac7c17f | 4815 | return buffer_peek(BUS_MESSAGE_FIELDS(m), m->fields_size, rindex, align, nbytes, ret); |
80a46c73 LP |
4816 | } |
4817 | ||
9f26c90c LP |
4818 | static int message_peek_field_uint32( |
4819 | sd_bus_message *m, | |
4820 | size_t *ri, | |
6647dc66 | 4821 | size_t item_size, |
9f26c90c LP |
4822 | uint32_t *ret) { |
4823 | ||
4824 | int r; | |
4825 | void *q; | |
4826 | ||
4827 | assert(m); | |
4828 | assert(ri); | |
4829 | ||
6647dc66 LP |
4830 | if (BUS_MESSAGE_IS_GVARIANT(m) && item_size != 4) |
4831 | return -EBADMSG; | |
4832 | ||
4833 | /* identical for gvariant and dbus1 */ | |
4834 | ||
9f26c90c LP |
4835 | r = message_peek_fields(m, ri, 4, 4, &q); |
4836 | if (r < 0) | |
4837 | return r; | |
4838 | ||
4839 | if (ret) | |
4840 | *ret = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
4841 | ||
4842 | return 0; | |
4843 | } | |
4844 | ||
2ac7c17f LP |
4845 | static int message_peek_field_uint64( |
4846 | sd_bus_message *m, | |
4847 | size_t *ri, | |
4848 | size_t item_size, | |
4849 | uint64_t *ret) { | |
4850 | ||
4851 | int r; | |
4852 | void *q; | |
4853 | ||
4854 | assert(m); | |
4855 | assert(ri); | |
4856 | ||
4857 | if (BUS_MESSAGE_IS_GVARIANT(m) && item_size != 8) | |
4858 | return -EBADMSG; | |
4859 | ||
4860 | /* identical for gvariant and dbus1 */ | |
4861 | ||
4862 | r = message_peek_fields(m, ri, 8, 8, &q); | |
4863 | if (r < 0) | |
4864 | return r; | |
4865 | ||
4866 | if (ret) | |
4867 | *ret = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q); | |
4868 | ||
4869 | return 0; | |
4870 | } | |
4871 | ||
80a46c73 LP |
4872 | static int message_peek_field_string( |
4873 | sd_bus_message *m, | |
6693860f | 4874 | bool (*validate)(const char *p), |
80a46c73 | 4875 | size_t *ri, |
6647dc66 | 4876 | size_t item_size, |
80a46c73 LP |
4877 | const char **ret) { |
4878 | ||
9f26c90c | 4879 | uint32_t l; |
80a46c73 LP |
4880 | int r; |
4881 | void *q; | |
4882 | ||
9a17484d | 4883 | assert(m); |
80a46c73 LP |
4884 | assert(ri); |
4885 | ||
6647dc66 | 4886 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
80a46c73 | 4887 | |
6647dc66 LP |
4888 | if (item_size <= 0) |
4889 | return -EBADMSG; | |
4890 | ||
4891 | r = message_peek_fields(m, ri, 1, item_size, &q); | |
4892 | if (r < 0) | |
4893 | return r; | |
4894 | ||
4895 | l = item_size - 1; | |
4896 | } else { | |
4897 | r = message_peek_field_uint32(m, ri, 4, &l); | |
4898 | if (r < 0) | |
4899 | return r; | |
4900 | ||
4901 | r = message_peek_fields(m, ri, 1, l+1, &q); | |
4902 | if (r < 0) | |
4903 | return r; | |
4904 | } | |
9a17484d | 4905 | |
6693860f LP |
4906 | if (validate) { |
4907 | if (!validate_nul(q, l)) | |
4908 | return -EBADMSG; | |
4909 | ||
4910 | if (!validate(q)) | |
ac89bf1d LP |
4911 | return -EBADMSG; |
4912 | } else { | |
4913 | if (!validate_string(q, l)) | |
4914 | return -EBADMSG; | |
4915 | } | |
80a46c73 LP |
4916 | |
4917 | if (ret) | |
4918 | *ret = q; | |
4919 | ||
4920 | return 0; | |
4921 | } | |
4922 | ||
4923 | static int message_peek_field_signature( | |
4924 | sd_bus_message *m, | |
4925 | size_t *ri, | |
6647dc66 | 4926 | size_t item_size, |
80a46c73 LP |
4927 | const char **ret) { |
4928 | ||
4929 | size_t l; | |
4930 | int r; | |
4931 | void *q; | |
4932 | ||
4933 | assert(m); | |
4934 | assert(ri); | |
4935 | ||
6647dc66 | 4936 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
80a46c73 | 4937 | |
6647dc66 LP |
4938 | if (item_size <= 0) |
4939 | return -EBADMSG; | |
4940 | ||
4941 | r = message_peek_fields(m, ri, 1, item_size, &q); | |
4942 | if (r < 0) | |
4943 | return r; | |
4944 | ||
4945 | l = item_size - 1; | |
4946 | } else { | |
4947 | r = message_peek_fields(m, ri, 1, 1, &q); | |
4948 | if (r < 0) | |
4949 | return r; | |
4950 | ||
4951 | l = *(uint8_t*) q; | |
4952 | r = message_peek_fields(m, ri, 1, l+1, &q); | |
4953 | if (r < 0) | |
4954 | return r; | |
4955 | } | |
80a46c73 LP |
4956 | |
4957 | if (!validate_signature(q, l)) | |
4958 | return -EBADMSG; | |
4959 | ||
4960 | if (ret) | |
4961 | *ret = q; | |
4962 | ||
4963 | return 0; | |
4964 | } | |
4965 | ||
80a46c73 LP |
4966 | static int message_skip_fields( |
4967 | sd_bus_message *m, | |
4968 | size_t *ri, | |
4969 | uint32_t array_size, | |
4970 | const char **signature) { | |
4971 | ||
4972 | size_t original_index; | |
4973 | int r; | |
4974 | ||
4975 | assert(m); | |
4976 | assert(ri); | |
4977 | assert(signature); | |
6647dc66 | 4978 | assert(!BUS_MESSAGE_IS_GVARIANT(m)); |
80a46c73 LP |
4979 | |
4980 | original_index = *ri; | |
4981 | ||
4982 | for (;;) { | |
4983 | char t; | |
80a46c73 LP |
4984 | size_t l; |
4985 | ||
4986 | if (array_size != (uint32_t) -1 && | |
4987 | array_size <= *ri - original_index) | |
4988 | return 0; | |
4989 | ||
4990 | t = **signature; | |
4991 | if (!t) | |
4992 | return 0; | |
4993 | ||
6693860f LP |
4994 | if (t == SD_BUS_TYPE_STRING) { |
4995 | ||
6647dc66 | 4996 | r = message_peek_field_string(m, NULL, ri, 0, NULL); |
6693860f LP |
4997 | if (r < 0) |
4998 | return r; | |
4999 | ||
5000 | (*signature)++; | |
5001 | ||
5002 | } else if (t == SD_BUS_TYPE_OBJECT_PATH) { | |
80a46c73 | 5003 | |
6647dc66 | 5004 | r = message_peek_field_string(m, object_path_is_valid, ri, 0, NULL); |
80a46c73 LP |
5005 | if (r < 0) |
5006 | return r; | |
5007 | ||
5008 | (*signature)++; | |
5009 | ||
5010 | } else if (t == SD_BUS_TYPE_SIGNATURE) { | |
5011 | ||
6647dc66 | 5012 | r = message_peek_field_signature(m, ri, 0, NULL); |
80a46c73 LP |
5013 | if (r < 0) |
5014 | return r; | |
5015 | ||
5016 | (*signature)++; | |
5017 | ||
5018 | } else if (bus_type_is_basic(t)) { | |
27f6e5c7 | 5019 | ssize_t align, k; |
80a46c73 | 5020 | |
c66a2e0c TG |
5021 | align = bus_type_get_alignment(t); |
5022 | k = bus_type_get_size(t); | |
27f6e5c7 | 5023 | assert(align > 0 && k > 0); |
80a46c73 LP |
5024 | |
5025 | r = message_peek_fields(m, ri, align, k, NULL); | |
5026 | if (r < 0) | |
5027 | return r; | |
9a17484d | 5028 | |
80a46c73 LP |
5029 | (*signature)++; |
5030 | ||
5031 | } else if (t == SD_BUS_TYPE_ARRAY) { | |
5032 | ||
5033 | r = signature_element_length(*signature+1, &l); | |
5034 | if (r < 0) | |
5035 | return r; | |
5036 | ||
5037 | assert(l >= 1); | |
5038 | { | |
5039 | char sig[l-1], *s; | |
9f26c90c | 5040 | uint32_t nas; |
80a46c73 LP |
5041 | int alignment; |
5042 | ||
5043 | strncpy(sig, *signature + 1, l-1); | |
5044 | s = sig; | |
5045 | ||
5046 | alignment = bus_type_get_alignment(sig[0]); | |
5047 | if (alignment < 0) | |
5048 | return alignment; | |
5049 | ||
6647dc66 | 5050 | r = message_peek_field_uint32(m, ri, 0, &nas); |
80a46c73 LP |
5051 | if (r < 0) |
5052 | return r; | |
ac89bf1d | 5053 | if (nas > BUS_ARRAY_MAX_SIZE) |
80a46c73 LP |
5054 | return -EBADMSG; |
5055 | ||
5056 | r = message_peek_fields(m, ri, alignment, 0, NULL); | |
5057 | if (r < 0) | |
5058 | return r; | |
5059 | ||
5060 | r = message_skip_fields(m, ri, nas, (const char**) &s); | |
5061 | if (r < 0) | |
5062 | return r; | |
5063 | } | |
5064 | ||
5065 | (*signature) += 1 + l; | |
5066 | ||
5067 | } else if (t == SD_BUS_TYPE_VARIANT) { | |
5068 | const char *s; | |
5069 | ||
6647dc66 | 5070 | r = message_peek_field_signature(m, ri, 0, &s); |
80a46c73 LP |
5071 | if (r < 0) |
5072 | return r; | |
5073 | ||
5074 | r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s); | |
5075 | if (r < 0) | |
5076 | return r; | |
5077 | ||
5078 | (*signature)++; | |
5079 | ||
945c2931 | 5080 | } else if (IN_SET(t, SD_BUS_TYPE_STRUCT, SD_BUS_TYPE_DICT_ENTRY)) { |
80a46c73 LP |
5081 | |
5082 | r = signature_element_length(*signature, &l); | |
5083 | if (r < 0) | |
5084 | return r; | |
5085 | ||
5086 | assert(l >= 2); | |
5087 | { | |
5088 | char sig[l-1], *s; | |
5089 | strncpy(sig, *signature + 1, l-1); | |
5090 | s = sig; | |
5091 | ||
5092 | r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s); | |
5093 | if (r < 0) | |
5094 | return r; | |
5095 | } | |
5096 | ||
5097 | *signature += l; | |
5098 | } else | |
5099 | return -EINVAL; | |
5100 | } | |
5101 | } | |
5102 | ||
6629161f | 5103 | int bus_message_parse_fields(sd_bus_message *m) { |
80a46c73 LP |
5104 | size_t ri; |
5105 | int r; | |
2c93b4ef | 5106 | uint32_t unix_fds = 0; |
5a4d665a | 5107 | bool unix_fds_set = false; |
6647dc66 LP |
5108 | void *offsets = NULL; |
5109 | unsigned n_offsets = 0; | |
8f2e44f8 | 5110 | size_t sz = 0; |
6647dc66 | 5111 | unsigned i = 0; |
80a46c73 LP |
5112 | |
5113 | assert(m); | |
5114 | ||
6647dc66 | 5115 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f LP |
5116 | char *p; |
5117 | ||
5118 | /* Read the signature from the end of the body variant first */ | |
5119 | sz = bus_gvariant_determine_word_size(BUS_MESSAGE_SIZE(m), 0); | |
5120 | if (m->footer_accessible < 1 + sz) | |
5121 | return -EBADMSG; | |
5122 | ||
5123 | p = (char*) m->footer + m->footer_accessible - (1 + sz); | |
5124 | for (;;) { | |
5125 | if (p < (char*) m->footer) | |
5126 | return -EBADMSG; | |
5127 | ||
5128 | if (*p == 0) { | |
03ebf5e8 | 5129 | size_t l; |
2ac7c17f LP |
5130 | char *c; |
5131 | ||
03ebf5e8 DH |
5132 | /* We found the beginning of the signature |
5133 | * string, yay! We require the body to be a | |
5134 | * structure, so verify it and then strip the | |
5135 | * opening/closing brackets. */ | |
2ac7c17f | 5136 | |
03ebf5e8 DH |
5137 | l = ((char*) m->footer + m->footer_accessible) - p - (1 + sz); |
5138 | if (l < 2 || | |
5139 | p[1] != SD_BUS_TYPE_STRUCT_BEGIN || | |
5140 | p[1 + l - 1] != SD_BUS_TYPE_STRUCT_END) | |
5141 | return -EBADMSG; | |
5142 | ||
5143 | c = strndup(p + 1 + 1, l - 2); | |
2ac7c17f LP |
5144 | if (!c) |
5145 | return -ENOMEM; | |
5146 | ||
5147 | free(m->root_container.signature); | |
5148 | m->root_container.signature = c; | |
5149 | break; | |
5150 | } | |
6647dc66 | 5151 | |
2ac7c17f LP |
5152 | p--; |
5153 | } | |
5154 | ||
5155 | /* Calculate the actual user body size, by removing | |
5156 | * the trailing variant signature and struct offset | |
5157 | * table */ | |
5158 | m->user_body_size = m->body_size - ((char*) m->footer + m->footer_accessible - p); | |
5159 | ||
5160 | /* Pull out the offset table for the fields array */ | |
5161 | sz = bus_gvariant_determine_word_size(m->fields_size, 0); | |
6647dc66 LP |
5162 | if (sz > 0) { |
5163 | size_t framing; | |
2ac7c17f | 5164 | void *q; |
6647dc66 | 5165 | |
2ac7c17f | 5166 | ri = m->fields_size - sz; |
6647dc66 LP |
5167 | r = message_peek_fields(m, &ri, 1, sz, &q); |
5168 | if (r < 0) | |
5169 | return r; | |
5170 | ||
2ac7c17f LP |
5171 | framing = bus_gvariant_read_word_le(q, sz); |
5172 | if (framing >= m->fields_size - sz) | |
6647dc66 | 5173 | return -EBADMSG; |
2ac7c17f | 5174 | if ((m->fields_size - framing) % sz != 0) |
6647dc66 LP |
5175 | return -EBADMSG; |
5176 | ||
5177 | ri = framing; | |
2ac7c17f | 5178 | r = message_peek_fields(m, &ri, 1, m->fields_size - framing, &offsets); |
6647dc66 LP |
5179 | if (r < 0) |
5180 | return r; | |
5181 | ||
2ac7c17f | 5182 | n_offsets = (m->fields_size - framing) / sz; |
6647dc66 | 5183 | } |
2ac7c17f LP |
5184 | } else |
5185 | m->user_body_size = m->body_size; | |
6647dc66 LP |
5186 | |
5187 | ri = 0; | |
2ac7c17f | 5188 | while (ri < m->fields_size) { |
6647dc66 | 5189 | _cleanup_free_ char *sig = NULL; |
80a46c73 | 5190 | const char *signature; |
2ac7c17f | 5191 | uint64_t field_type; |
6647dc66 LP |
5192 | size_t item_size = (size_t) -1; |
5193 | ||
5194 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
2ac7c17f LP |
5195 | uint64_t *u64; |
5196 | ||
6647dc66 LP |
5197 | if (i >= n_offsets) |
5198 | break; | |
5199 | ||
5200 | if (i == 0) | |
5201 | ri = 0; | |
5202 | else | |
2ac7c17f | 5203 | ri = ALIGN_TO(bus_gvariant_read_word_le((uint8_t*) offsets + (i-1)*sz, sz), 8); |
80a46c73 | 5204 | |
2ac7c17f LP |
5205 | r = message_peek_fields(m, &ri, 8, 8, (void**) &u64); |
5206 | if (r < 0) | |
5207 | return r; | |
5208 | ||
5209 | field_type = BUS_MESSAGE_BSWAP64(m, *u64); | |
5210 | } else { | |
5211 | uint8_t *u8; | |
5212 | ||
5213 | r = message_peek_fields(m, &ri, 8, 1, (void**) &u8); | |
5214 | if (r < 0) | |
5215 | return r; | |
5216 | ||
5217 | field_type = *u8; | |
5218 | } | |
954871d8 | 5219 | |
6647dc66 LP |
5220 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
5221 | size_t where, end; | |
5222 | char *b; | |
5223 | void *q; | |
5224 | ||
2ac7c17f | 5225 | end = bus_gvariant_read_word_le((uint8_t*) offsets + i*sz, sz); |
6647dc66 LP |
5226 | |
5227 | if (end < ri) | |
5228 | return -EBADMSG; | |
5229 | ||
5230 | where = ri = ALIGN_TO(ri, 8); | |
5231 | item_size = end - ri; | |
5232 | r = message_peek_fields(m, &where, 1, item_size, &q); | |
5233 | if (r < 0) | |
5234 | return r; | |
5235 | ||
5236 | b = memrchr(q, 0, item_size); | |
5237 | if (!b) | |
5238 | return -EBADMSG; | |
5239 | ||
5240 | sig = strndup(b+1, item_size - (b+1-(char*) q)); | |
5241 | if (!sig) | |
5242 | return -ENOMEM; | |
5243 | ||
5244 | signature = sig; | |
5245 | item_size = b - (char*) q; | |
5246 | } else { | |
5247 | r = message_peek_field_signature(m, &ri, 0, &signature); | |
5248 | if (r < 0) | |
5249 | return r; | |
5250 | } | |
80a46c73 | 5251 | |
2ac7c17f LP |
5252 | switch (field_type) { |
5253 | ||
0461f8cd | 5254 | case _BUS_MESSAGE_HEADER_INVALID: |
80a46c73 LP |
5255 | return -EBADMSG; |
5256 | ||
0461f8cd | 5257 | case BUS_MESSAGE_HEADER_PATH: |
2c93b4ef LP |
5258 | |
5259 | if (m->path) | |
5260 | return -EBADMSG; | |
5261 | ||
80a46c73 LP |
5262 | if (!streq(signature, "o")) |
5263 | return -EBADMSG; | |
5264 | ||
6647dc66 | 5265 | r = message_peek_field_string(m, object_path_is_valid, &ri, item_size, &m->path); |
80a46c73 LP |
5266 | break; |
5267 | ||
0461f8cd | 5268 | case BUS_MESSAGE_HEADER_INTERFACE: |
2c93b4ef LP |
5269 | |
5270 | if (m->interface) | |
5271 | return -EBADMSG; | |
5272 | ||
80a46c73 LP |
5273 | if (!streq(signature, "s")) |
5274 | return -EBADMSG; | |
5275 | ||
6647dc66 | 5276 | r = message_peek_field_string(m, interface_name_is_valid, &ri, item_size, &m->interface); |
80a46c73 LP |
5277 | break; |
5278 | ||
0461f8cd | 5279 | case BUS_MESSAGE_HEADER_MEMBER: |
2c93b4ef LP |
5280 | |
5281 | if (m->member) | |
5282 | return -EBADMSG; | |
5283 | ||
80a46c73 LP |
5284 | if (!streq(signature, "s")) |
5285 | return -EBADMSG; | |
5286 | ||
6647dc66 | 5287 | r = message_peek_field_string(m, member_name_is_valid, &ri, item_size, &m->member); |
80a46c73 LP |
5288 | break; |
5289 | ||
0461f8cd | 5290 | case BUS_MESSAGE_HEADER_ERROR_NAME: |
2c93b4ef LP |
5291 | |
5292 | if (m->error.name) | |
5293 | return -EBADMSG; | |
5294 | ||
80a46c73 LP |
5295 | if (!streq(signature, "s")) |
5296 | return -EBADMSG; | |
5297 | ||
6647dc66 | 5298 | r = message_peek_field_string(m, error_name_is_valid, &ri, item_size, &m->error.name); |
79f8d3d2 LP |
5299 | if (r >= 0) |
5300 | m->error._need_free = -1; | |
5301 | ||
80a46c73 LP |
5302 | break; |
5303 | ||
0461f8cd | 5304 | case BUS_MESSAGE_HEADER_DESTINATION: |
2c93b4ef LP |
5305 | |
5306 | if (m->destination) | |
5307 | return -EBADMSG; | |
5308 | ||
80a46c73 LP |
5309 | if (!streq(signature, "s")) |
5310 | return -EBADMSG; | |
5311 | ||
6647dc66 | 5312 | r = message_peek_field_string(m, service_name_is_valid, &ri, item_size, &m->destination); |
80a46c73 LP |
5313 | break; |
5314 | ||
0461f8cd | 5315 | case BUS_MESSAGE_HEADER_SENDER: |
2c93b4ef LP |
5316 | |
5317 | if (m->sender) | |
5318 | return -EBADMSG; | |
5319 | ||
80a46c73 LP |
5320 | if (!streq(signature, "s")) |
5321 | return -EBADMSG; | |
5322 | ||
6647dc66 | 5323 | r = message_peek_field_string(m, service_name_is_valid, &ri, item_size, &m->sender); |
49b832c5 | 5324 | |
a132bef0 | 5325 | if (r >= 0 && m->sender[0] == ':' && m->bus->bus_client) { |
49b832c5 LP |
5326 | m->creds.unique_name = (char*) m->sender; |
5327 | m->creds.mask |= SD_BUS_CREDS_UNIQUE_NAME & m->bus->creds_mask; | |
5328 | } | |
5329 | ||
80a46c73 LP |
5330 | break; |
5331 | ||
5332 | ||
0461f8cd | 5333 | case BUS_MESSAGE_HEADER_SIGNATURE: { |
80a46c73 LP |
5334 | const char *s; |
5335 | char *c; | |
5336 | ||
2ac7c17f LP |
5337 | if (BUS_MESSAGE_IS_GVARIANT(m)) /* only applies to dbus1 */ |
5338 | return -EBADMSG; | |
5339 | ||
2c93b4ef LP |
5340 | if (m->root_container.signature) |
5341 | return -EBADMSG; | |
5342 | ||
80a46c73 LP |
5343 | if (!streq(signature, "g")) |
5344 | return -EBADMSG; | |
5345 | ||
6647dc66 | 5346 | r = message_peek_field_signature(m, &ri, item_size, &s); |
80a46c73 LP |
5347 | if (r < 0) |
5348 | return r; | |
5349 | ||
5350 | c = strdup(s); | |
5351 | if (!c) | |
5352 | return -ENOMEM; | |
5353 | ||
5354 | free(m->root_container.signature); | |
5355 | m->root_container.signature = c; | |
80a46c73 LP |
5356 | break; |
5357 | } | |
5358 | ||
2ac7c17f | 5359 | case BUS_MESSAGE_HEADER_REPLY_SERIAL: |
42c4ebcb | 5360 | |
693eb9a2 | 5361 | if (m->reply_cookie != 0) |
2c93b4ef LP |
5362 | return -EBADMSG; |
5363 | ||
2ac7c17f LP |
5364 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
5365 | /* 64bit on dbus2 */ | |
6693860f | 5366 | |
2ac7c17f LP |
5367 | if (!streq(signature, "t")) |
5368 | return -EBADMSG; | |
5369 | ||
5370 | r = message_peek_field_uint64(m, &ri, item_size, &m->reply_cookie); | |
5371 | if (r < 0) | |
5372 | return r; | |
5373 | } else { | |
5374 | /* 32bit on dbus1 */ | |
5375 | uint32_t serial; | |
5376 | ||
5377 | if (!streq(signature, "u")) | |
5378 | return -EBADMSG; | |
b381de41 | 5379 | |
2ac7c17f LP |
5380 | r = message_peek_field_uint32(m, &ri, item_size, &serial); |
5381 | if (r < 0) | |
5382 | return r; | |
5383 | ||
5384 | m->reply_cookie = serial; | |
5385 | } | |
42c4ebcb | 5386 | |
693eb9a2 | 5387 | if (m->reply_cookie == 0) |
6693860f LP |
5388 | return -EBADMSG; |
5389 | ||
80a46c73 LP |
5390 | break; |
5391 | ||
0461f8cd | 5392 | case BUS_MESSAGE_HEADER_UNIX_FDS: |
5a4d665a | 5393 | if (unix_fds_set) |
2c93b4ef LP |
5394 | return -EBADMSG; |
5395 | ||
5396 | if (!streq(signature, "u")) | |
5397 | return -EBADMSG; | |
5398 | ||
6647dc66 | 5399 | r = message_peek_field_uint32(m, &ri, item_size, &unix_fds); |
2c93b4ef LP |
5400 | if (r < 0) |
5401 | return -EBADMSG; | |
5402 | ||
5a4d665a | 5403 | unix_fds_set = true; |
2c93b4ef LP |
5404 | break; |
5405 | ||
80a46c73 | 5406 | default: |
6647dc66 LP |
5407 | if (!BUS_MESSAGE_IS_GVARIANT(m)) |
5408 | r = message_skip_fields(m, &ri, (uint32_t) -1, (const char **) &signature); | |
80a46c73 LP |
5409 | } |
5410 | ||
5411 | if (r < 0) | |
5412 | return r; | |
6647dc66 LP |
5413 | |
5414 | i++; | |
80a46c73 LP |
5415 | } |
5416 | ||
2c93b4ef LP |
5417 | if (m->n_fds != unix_fds) |
5418 | return -EBADMSG; | |
5419 | ||
80a46c73 LP |
5420 | switch (m->header->type) { |
5421 | ||
40ca29a1 | 5422 | case SD_BUS_MESSAGE_SIGNAL: |
80a46c73 LP |
5423 | if (!m->path || !m->interface || !m->member) |
5424 | return -EBADMSG; | |
7fa934b0 LP |
5425 | |
5426 | if (m->reply_cookie != 0) | |
5427 | return -EBADMSG; | |
5428 | ||
80a46c73 LP |
5429 | break; |
5430 | ||
40ca29a1 | 5431 | case SD_BUS_MESSAGE_METHOD_CALL: |
80a46c73 LP |
5432 | |
5433 | if (!m->path || !m->member) | |
5434 | return -EBADMSG; | |
5435 | ||
7fa934b0 LP |
5436 | if (m->reply_cookie != 0) |
5437 | return -EBADMSG; | |
5438 | ||
80a46c73 LP |
5439 | break; |
5440 | ||
40ca29a1 | 5441 | case SD_BUS_MESSAGE_METHOD_RETURN: |
80a46c73 | 5442 | |
693eb9a2 | 5443 | if (m->reply_cookie == 0) |
80a46c73 LP |
5444 | return -EBADMSG; |
5445 | break; | |
5446 | ||
40ca29a1 | 5447 | case SD_BUS_MESSAGE_METHOD_ERROR: |
80a46c73 | 5448 | |
693eb9a2 | 5449 | if (m->reply_cookie == 0 || !m->error.name) |
80a46c73 LP |
5450 | return -EBADMSG; |
5451 | break; | |
5452 | } | |
9a17484d | 5453 | |
35473296 LP |
5454 | /* Refuse non-local messages that claim they are local */ |
5455 | if (streq_ptr(m->path, "/org/freedesktop/DBus/Local")) | |
5456 | return -EBADMSG; | |
5457 | if (streq_ptr(m->interface, "org.freedesktop.DBus.Local")) | |
5458 | return -EBADMSG; | |
5459 | if (streq_ptr(m->sender, "org.freedesktop.DBus.Local")) | |
5460 | return -EBADMSG; | |
5461 | ||
2ac7c17f | 5462 | m->root_container.end = m->user_body_size; |
6647dc66 LP |
5463 | |
5464 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
5465 | r = build_struct_offsets( | |
5466 | m, | |
5467 | m->root_container.signature, | |
2ac7c17f | 5468 | m->user_body_size, |
6647dc66 LP |
5469 | &m->root_container.item_size, |
5470 | &m->root_container.offsets, | |
5471 | &m->root_container.n_offsets); | |
5472 | if (r < 0) | |
5473 | return r; | |
5474 | } | |
5475 | ||
89ffcd2a | 5476 | /* Try to read the error message, but if we can't it's a non-issue */ |
40ca29a1 | 5477 | if (m->header->type == SD_BUS_MESSAGE_METHOD_ERROR) |
d3839740 | 5478 | (void) sd_bus_message_read(m, "s", &m->error.message); |
89ffcd2a | 5479 | |
9a17484d LP |
5480 | return 0; |
5481 | } | |
5482 | ||
d9f644e2 | 5483 | _public_ int sd_bus_message_set_destination(sd_bus_message *m, const char *destination) { |
9d6c7c82 LP |
5484 | assert_return(m, -EINVAL); |
5485 | assert_return(destination, -EINVAL); | |
5486 | assert_return(!m->sealed, -EPERM); | |
5487 | assert_return(!m->destination, -EEXIST); | |
9a17484d | 5488 | |
0461f8cd | 5489 | return message_append_field_string(m, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &m->destination); |
9a17484d LP |
5490 | } |
5491 | ||
48ef41a3 LP |
5492 | _public_ int sd_bus_message_set_sender(sd_bus_message *m, const char *sender) { |
5493 | assert_return(m, -EINVAL); | |
5494 | assert_return(sender, -EINVAL); | |
5495 | assert_return(!m->sealed, -EPERM); | |
5496 | assert_return(!m->sender, -EEXIST); | |
5497 | ||
5498 | return message_append_field_string(m, BUS_MESSAGE_HEADER_SENDER, SD_BUS_TYPE_STRING, sender, &m->sender); | |
5499 | } | |
5500 | ||
de1c301e LP |
5501 | int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz) { |
5502 | size_t total; | |
de1c301e | 5503 | void *p, *e; |
bc7fd8cd LP |
5504 | unsigned i; |
5505 | struct bus_body_part *part; | |
de1c301e LP |
5506 | |
5507 | assert(m); | |
5508 | assert(buffer); | |
5509 | assert(sz); | |
5510 | ||
6629161f | 5511 | total = BUS_MESSAGE_SIZE(m); |
de1c301e LP |
5512 | |
5513 | p = malloc(total); | |
5514 | if (!p) | |
5515 | return -ENOMEM; | |
5516 | ||
c91cb83c | 5517 | e = mempcpy(p, m->header, BUS_MESSAGE_BODY_BEGIN(m)); |
9b29bb68 | 5518 | MESSAGE_FOREACH_PART(part, i, m) |
bc7fd8cd | 5519 | e = mempcpy(e, part->data, part->size); |
2100fa10 LP |
5520 | |
5521 | assert(total == (size_t) ((uint8_t*) e - (uint8_t*) p)); | |
de1c301e LP |
5522 | |
5523 | *buffer = p; | |
5524 | *sz = total; | |
5525 | ||
5526 | return 0; | |
5527 | } | |
89ffcd2a LP |
5528 | |
5529 | int bus_message_read_strv_extend(sd_bus_message *m, char ***l) { | |
43ef7603 | 5530 | const char *s; |
89ffcd2a LP |
5531 | int r; |
5532 | ||
5533 | assert(m); | |
5534 | assert(l); | |
5535 | ||
5536 | r = sd_bus_message_enter_container(m, 'a', "s"); | |
4686d1b6 | 5537 | if (r <= 0) |
89ffcd2a LP |
5538 | return r; |
5539 | ||
43ef7603 | 5540 | while ((r = sd_bus_message_read_basic(m, 's', &s)) > 0) { |
89ffcd2a LP |
5541 | r = strv_extend(l, s); |
5542 | if (r < 0) | |
5543 | return r; | |
5544 | } | |
43ef7603 DH |
5545 | if (r < 0) |
5546 | return r; | |
89ffcd2a LP |
5547 | |
5548 | r = sd_bus_message_exit_container(m); | |
5549 | if (r < 0) | |
5550 | return r; | |
5551 | ||
405cd3aa | 5552 | return 1; |
89ffcd2a | 5553 | } |
392d5b37 | 5554 | |
ba341e7c | 5555 | _public_ int sd_bus_message_read_strv(sd_bus_message *m, char ***l) { |
4686d1b6 MAP |
5556 | char **strv = NULL; |
5557 | int r; | |
5558 | ||
5559 | assert_return(m, -EINVAL); | |
5560 | assert_return(m->sealed, -EPERM); | |
5561 | assert_return(l, -EINVAL); | |
5562 | ||
5563 | r = bus_message_read_strv_extend(m, &strv); | |
5564 | if (r <= 0) { | |
5565 | strv_free(strv); | |
5566 | return r; | |
5567 | } | |
5568 | ||
5569 | *l = strv; | |
5570 | return 1; | |
5571 | } | |
5572 | ||
eccd47c5 LP |
5573 | static int bus_message_get_arg_skip( |
5574 | sd_bus_message *m, | |
5575 | unsigned i, | |
5576 | char *_type, | |
5577 | const char **_contents) { | |
5578 | ||
42c5aaf3 | 5579 | unsigned j; |
198b158f | 5580 | int r; |
392d5b37 | 5581 | |
392d5b37 LP |
5582 | r = sd_bus_message_rewind(m, true); |
5583 | if (r < 0) | |
198b158f | 5584 | return r; |
392d5b37 | 5585 | |
198b158f | 5586 | for (j = 0;; j++) { |
eccd47c5 LP |
5587 | const char *contents; |
5588 | char type; | |
5589 | ||
198b158f LP |
5590 | r = sd_bus_message_peek_type(m, &type, &contents); |
5591 | if (r < 0) | |
5592 | return r; | |
5593 | if (r == 0) | |
5594 | return -ENXIO; | |
5595 | ||
5596 | /* Don't match against arguments after the first one we don't understand */ | |
5597 | if (!IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE) && | |
5598 | !(type == SD_BUS_TYPE_ARRAY && STR_IN_SET(contents, "s", "o", "g"))) | |
5599 | return -ENXIO; | |
42c5aaf3 | 5600 | |
eccd47c5 LP |
5601 | if (j >= i) { |
5602 | if (_contents) | |
5603 | *_contents = contents; | |
5604 | if (_type) | |
5605 | *_type = type; | |
5606 | return 0; | |
5607 | } | |
198b158f LP |
5608 | |
5609 | r = sd_bus_message_skip(m, NULL); | |
392d5b37 | 5610 | if (r < 0) |
198b158f LP |
5611 | return r; |
5612 | } | |
392d5b37 | 5613 | |
eccd47c5 | 5614 | } |
392d5b37 | 5615 | |
eccd47c5 LP |
5616 | int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str) { |
5617 | char type; | |
5618 | int r; | |
198b158f | 5619 | |
eccd47c5 LP |
5620 | assert(m); |
5621 | assert(str); | |
198b158f | 5622 | |
eccd47c5 LP |
5623 | r = bus_message_get_arg_skip(m, i, &type, NULL); |
5624 | if (r < 0) | |
5625 | return r; | |
198b158f | 5626 | |
eccd47c5 LP |
5627 | if (!IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE)) |
5628 | return -ENXIO; | |
392d5b37 | 5629 | |
eccd47c5 LP |
5630 | return sd_bus_message_read_basic(m, type, str); |
5631 | } | |
5632 | ||
5633 | int bus_message_get_arg_strv(sd_bus_message *m, unsigned i, char ***strv) { | |
5634 | const char *contents; | |
5635 | char type; | |
5636 | int r; | |
5637 | ||
5638 | assert(m); | |
5639 | assert(strv); | |
5640 | ||
5641 | r = bus_message_get_arg_skip(m, i, &type, &contents); | |
5642 | if (r < 0) | |
5643 | return r; | |
5644 | ||
5645 | if (type != SD_BUS_TYPE_ARRAY) | |
5646 | return -ENXIO; | |
5647 | if (!STR_IN_SET(contents, "s", "o", "g")) | |
5648 | return -ENXIO; | |
5649 | ||
5650 | return sd_bus_message_read_strv(m, strv); | |
392d5b37 | 5651 | } |
2100fa10 | 5652 | |
d9f644e2 | 5653 | _public_ int sd_bus_message_get_errno(sd_bus_message *m) { |
b49ffb29 | 5654 | assert_return(m, EINVAL); |
eb01ba5d | 5655 | |
40ca29a1 | 5656 | if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) |
eb01ba5d LP |
5657 | return 0; |
5658 | ||
40ca29a1 | 5659 | return sd_bus_error_get_errno(&m->error); |
eb01ba5d | 5660 | } |
29ddb38f | 5661 | |
d9f644e2 | 5662 | _public_ const char* sd_bus_message_get_signature(sd_bus_message *m, int complete) { |
29ddb38f LP |
5663 | struct bus_container *c; |
5664 | ||
9d6c7c82 | 5665 | assert_return(m, NULL); |
29ddb38f LP |
5666 | |
5667 | c = complete ? &m->root_container : message_get_container(m); | |
d6385068 | 5668 | return strempty(c->signature); |
29ddb38f | 5669 | } |
c430fee6 | 5670 | |
8022212b LP |
5671 | _public_ int sd_bus_message_is_empty(sd_bus_message *m) { |
5672 | assert_return(m, -EINVAL); | |
5673 | ||
5674 | return isempty(m->root_container.signature); | |
5675 | } | |
5676 | ||
64e96a19 LP |
5677 | _public_ int sd_bus_message_has_signature(sd_bus_message *m, const char *signature) { |
5678 | assert_return(m, -EINVAL); | |
5679 | ||
5680 | return streq(strempty(m->root_container.signature), strempty(signature)); | |
5681 | } | |
5682 | ||
d9f644e2 | 5683 | _public_ int sd_bus_message_copy(sd_bus_message *m, sd_bus_message *source, int all) { |
c430fee6 LP |
5684 | bool done_something = false; |
5685 | int r; | |
5686 | ||
80ba3b84 LP |
5687 | assert_return(m, -EINVAL); |
5688 | assert_return(source, -EINVAL); | |
5689 | assert_return(!m->sealed, -EPERM); | |
5690 | assert_return(source->sealed, -EPERM); | |
5691 | ||
c430fee6 LP |
5692 | do { |
5693 | const char *contents; | |
5694 | char type; | |
5695 | union { | |
5696 | uint8_t u8; | |
5697 | uint16_t u16; | |
5698 | int16_t s16; | |
5699 | uint32_t u32; | |
5700 | int32_t s32; | |
5701 | uint64_t u64; | |
5702 | int64_t s64; | |
5703 | double d64; | |
5704 | const char *string; | |
5705 | int i; | |
5706 | } basic; | |
5707 | ||
5708 | r = sd_bus_message_peek_type(source, &type, &contents); | |
5709 | if (r < 0) | |
5710 | return r; | |
5711 | if (r == 0) | |
5712 | break; | |
5713 | ||
5714 | done_something = true; | |
5715 | ||
5716 | if (bus_type_is_container(type) > 0) { | |
5717 | ||
5718 | r = sd_bus_message_enter_container(source, type, contents); | |
5719 | if (r < 0) | |
5720 | return r; | |
5721 | ||
5722 | r = sd_bus_message_open_container(m, type, contents); | |
5723 | if (r < 0) | |
5724 | return r; | |
5725 | ||
5726 | r = sd_bus_message_copy(m, source, true); | |
5727 | if (r < 0) | |
5728 | return r; | |
5729 | ||
5730 | r = sd_bus_message_close_container(m); | |
5731 | if (r < 0) | |
5732 | return r; | |
5733 | ||
5734 | r = sd_bus_message_exit_container(source); | |
5735 | if (r < 0) | |
5736 | return r; | |
5737 | ||
5738 | continue; | |
5739 | } | |
5740 | ||
5741 | r = sd_bus_message_read_basic(source, type, &basic); | |
5742 | if (r < 0) | |
5743 | return r; | |
5744 | ||
5745 | assert(r > 0); | |
5746 | ||
945c2931 | 5747 | if (IN_SET(type, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE, SD_BUS_TYPE_STRING)) |
c430fee6 LP |
5748 | r = sd_bus_message_append_basic(m, type, basic.string); |
5749 | else | |
5750 | r = sd_bus_message_append_basic(m, type, &basic); | |
5751 | ||
5752 | if (r < 0) | |
5753 | return r; | |
5754 | ||
5755 | } while (all); | |
5756 | ||
5757 | return done_something; | |
5758 | } | |
5759 | ||
d9f644e2 | 5760 | _public_ int sd_bus_message_verify_type(sd_bus_message *m, char type, const char *contents) { |
c430fee6 LP |
5761 | const char *c; |
5762 | char t; | |
5763 | int r; | |
5764 | ||
5765 | assert_return(m, -EINVAL); | |
5766 | assert_return(m->sealed, -EPERM); | |
5767 | assert_return(!type || bus_type_is_valid(type), -EINVAL); | |
5768 | assert_return(!contents || signature_is_valid(contents, true), -EINVAL); | |
5769 | assert_return(type || contents, -EINVAL); | |
5770 | assert_return(!contents || !type || bus_type_is_container(type), -EINVAL); | |
5771 | ||
5772 | r = sd_bus_message_peek_type(m, &t, &c); | |
5773 | if (r <= 0) | |
5774 | return r; | |
5775 | ||
5776 | if (type != 0 && type != t) | |
5777 | return 0; | |
5778 | ||
5779 | if (contents && !streq_ptr(contents, c)) | |
5780 | return 0; | |
5781 | ||
5782 | return 1; | |
5783 | } | |
2be44176 LP |
5784 | |
5785 | _public_ sd_bus *sd_bus_message_get_bus(sd_bus_message *m) { | |
5786 | assert_return(m, NULL); | |
5787 | ||
5788 | return m->bus; | |
5789 | } | |
e1c433c6 LP |
5790 | |
5791 | int bus_message_remarshal(sd_bus *bus, sd_bus_message **m) { | |
4afd3348 | 5792 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *n = NULL; |
e1c433c6 LP |
5793 | usec_t timeout; |
5794 | int r; | |
5795 | ||
5796 | assert(bus); | |
5797 | assert(m); | |
5798 | assert(*m); | |
5799 | ||
5800 | switch ((*m)->header->type) { | |
5801 | ||
5802 | case SD_BUS_MESSAGE_SIGNAL: | |
151b9b96 | 5803 | r = sd_bus_message_new_signal(bus, &n, (*m)->path, (*m)->interface, (*m)->member); |
e1c433c6 LP |
5804 | if (r < 0) |
5805 | return r; | |
5806 | ||
5807 | break; | |
5808 | ||
5809 | case SD_BUS_MESSAGE_METHOD_CALL: | |
151b9b96 | 5810 | r = sd_bus_message_new_method_call(bus, &n, (*m)->destination, (*m)->path, (*m)->interface, (*m)->member); |
e1c433c6 LP |
5811 | if (r < 0) |
5812 | return r; | |
5813 | ||
5814 | break; | |
5815 | ||
5816 | case SD_BUS_MESSAGE_METHOD_RETURN: | |
5817 | case SD_BUS_MESSAGE_METHOD_ERROR: | |
5818 | ||
75bcbcf2 SA |
5819 | r = sd_bus_message_new(bus, &n, (*m)->header->type); |
5820 | if (r < 0) | |
e1c433c6 LP |
5821 | return -ENOMEM; |
5822 | ||
75bcbcf2 SA |
5823 | assert(n); |
5824 | ||
693eb9a2 | 5825 | n->reply_cookie = (*m)->reply_cookie; |
b267a6d2 LP |
5826 | |
5827 | r = message_append_reply_cookie(n, n->reply_cookie); | |
e1c433c6 LP |
5828 | if (r < 0) |
5829 | return r; | |
5830 | ||
5831 | if ((*m)->header->type == SD_BUS_MESSAGE_METHOD_ERROR && (*m)->error.name) { | |
5832 | r = message_append_field_string(n, BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, (*m)->error.name, &n->error.message); | |
5833 | if (r < 0) | |
5834 | return r; | |
5835 | ||
5836 | n->error._need_free = -1; | |
5837 | } | |
5838 | ||
5839 | break; | |
5840 | ||
5841 | default: | |
5842 | return -EINVAL; | |
5843 | } | |
5844 | ||
5845 | if ((*m)->destination && !n->destination) { | |
5846 | r = message_append_field_string(n, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, (*m)->destination, &n->destination); | |
5847 | if (r < 0) | |
5848 | return r; | |
5849 | } | |
5850 | ||
5851 | if ((*m)->sender && !n->sender) { | |
5852 | r = message_append_field_string(n, BUS_MESSAGE_HEADER_SENDER, SD_BUS_TYPE_STRING, (*m)->sender, &n->sender); | |
5853 | if (r < 0) | |
5854 | return r; | |
5855 | } | |
5856 | ||
5857 | n->header->flags |= (*m)->header->flags & (BUS_MESSAGE_NO_REPLY_EXPECTED|BUS_MESSAGE_NO_AUTO_START); | |
5858 | ||
5859 | r = sd_bus_message_copy(n, *m, true); | |
5860 | if (r < 0) | |
5861 | return r; | |
5862 | ||
5863 | timeout = (*m)->timeout; | |
5864 | if (timeout == 0 && !((*m)->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)) | |
5865 | timeout = BUS_DEFAULT_TIMEOUT; | |
5866 | ||
75bcbcf2 | 5867 | r = sd_bus_message_seal(n, BUS_MESSAGE_COOKIE(*m), timeout); |
e1c433c6 LP |
5868 | if (r < 0) |
5869 | return r; | |
5870 | ||
5871 | sd_bus_message_unref(*m); | |
5872 | *m = n; | |
5873 | n = NULL; | |
5874 | ||
5875 | return 0; | |
5876 | } | |
a7639e37 LP |
5877 | |
5878 | int bus_message_append_sender(sd_bus_message *m, const char *sender) { | |
5879 | assert(m); | |
5880 | assert(sender); | |
5881 | ||
5882 | assert_return(!m->sealed, -EPERM); | |
5883 | assert_return(!m->sender, -EPERM); | |
5884 | ||
5885 | return message_append_field_string(m, BUS_MESSAGE_HEADER_SENDER, SD_BUS_TYPE_STRING, sender, &m->sender); | |
5886 | } | |
ca7b42c8 LP |
5887 | |
5888 | _public_ int sd_bus_message_get_priority(sd_bus_message *m, int64_t *priority) { | |
5889 | assert_return(m, -EINVAL); | |
5890 | assert_return(priority, -EINVAL); | |
5891 | ||
5892 | *priority = m->priority; | |
5893 | return 0; | |
5894 | } | |
5895 | ||
5896 | _public_ int sd_bus_message_set_priority(sd_bus_message *m, int64_t priority) { | |
5897 | assert_return(m, -EINVAL); | |
5898 | assert_return(!m->sealed, -EPERM); | |
5899 | ||
5900 | m->priority = priority; | |
5901 | return 0; | |
5902 | } |