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