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Commit | Line | Data |
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52ad194e | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
60f067b4 JS |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2013 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
21 | #include <errno.h> | |
22 | #include <fcntl.h> | |
23 | #include <sys/mman.h> | |
24 | ||
60f067b4 | 25 | #include "sd-bus.h" |
db2df898 MP |
26 | |
27 | #include "alloc-util.h" | |
28 | #include "bus-gvariant.h" | |
60f067b4 | 29 | #include "bus-internal.h" |
db2df898 | 30 | #include "bus-message.h" |
60f067b4 | 31 | #include "bus-signature.h" |
db2df898 | 32 | #include "bus-type.h" |
60f067b4 | 33 | #include "bus-util.h" |
db2df898 MP |
34 | #include "fd-util.h" |
35 | #include "io-util.h" | |
36 | #include "memfd-util.h" | |
37 | #include "string-util.h" | |
38 | #include "strv.h" | |
39 | #include "time-util.h" | |
40 | #include "utf8.h" | |
41 | #include "util.h" | |
60f067b4 JS |
42 | |
43 | static int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored); | |
44 | ||
45 | static void *adjust_pointer(const void *p, void *old_base, size_t sz, void *new_base) { | |
46 | ||
47 | if (p == NULL) | |
48 | return NULL; | |
49 | ||
50 | if (old_base == new_base) | |
51 | return (void*) p; | |
52 | ||
53 | if ((uint8_t*) p < (uint8_t*) old_base) | |
54 | return (void*) p; | |
55 | ||
56 | if ((uint8_t*) p >= (uint8_t*) old_base + sz) | |
57 | return (void*) p; | |
58 | ||
59 | return (uint8_t*) new_base + ((uint8_t*) p - (uint8_t*) old_base); | |
60 | } | |
61 | ||
62 | static void message_free_part(sd_bus_message *m, struct bus_body_part *part) { | |
63 | assert(m); | |
64 | assert(part); | |
65 | ||
f5e65279 MB |
66 | if (part->memfd >= 0) |
67 | close_and_munmap(part->memfd, part->mmap_begin, part->mapped); | |
68 | else if (part->munmap_this) | |
f47781d8 | 69 | munmap(part->mmap_begin, part->mapped); |
60f067b4 JS |
70 | else if (part->free_this) |
71 | free(part->data); | |
72 | ||
73 | if (part != &m->body) | |
74 | free(part); | |
75 | } | |
76 | ||
77 | static void message_reset_parts(sd_bus_message *m) { | |
78 | struct bus_body_part *part; | |
79 | ||
80 | assert(m); | |
81 | ||
82 | part = &m->body; | |
83 | while (m->n_body_parts > 0) { | |
84 | struct bus_body_part *next = part->next; | |
85 | message_free_part(m, part); | |
86 | part = next; | |
87 | m->n_body_parts--; | |
88 | } | |
89 | ||
90 | m->body_end = NULL; | |
91 | ||
92 | m->cached_rindex_part = NULL; | |
93 | m->cached_rindex_part_begin = 0; | |
94 | } | |
95 | ||
96 | static void message_reset_containers(sd_bus_message *m) { | |
97 | unsigned i; | |
98 | ||
99 | assert(m); | |
100 | ||
101 | for (i = 0; i < m->n_containers; i++) { | |
102 | free(m->containers[i].signature); | |
103 | free(m->containers[i].offsets); | |
104 | } | |
105 | ||
6300502b | 106 | m->containers = mfree(m->containers); |
60f067b4 JS |
107 | |
108 | m->n_containers = m->containers_allocated = 0; | |
109 | m->root_container.index = 0; | |
110 | } | |
111 | ||
112 | static void message_free(sd_bus_message *m) { | |
113 | assert(m); | |
114 | ||
115 | if (m->free_header) | |
116 | free(m->header); | |
117 | ||
118 | message_reset_parts(m); | |
119 | ||
60f067b4 JS |
120 | sd_bus_unref(m->bus); |
121 | ||
122 | if (m->free_fds) { | |
123 | close_many(m->fds, m->n_fds); | |
124 | free(m->fds); | |
125 | } | |
126 | ||
127 | if (m->iovec != m->iovec_fixed) | |
128 | free(m->iovec); | |
129 | ||
13d276d0 | 130 | m->destination_ptr = mfree(m->destination_ptr); |
60f067b4 JS |
131 | message_reset_containers(m); |
132 | free(m->root_container.signature); | |
133 | free(m->root_container.offsets); | |
134 | ||
135 | free(m->root_container.peeked_signature); | |
136 | ||
137 | bus_creds_done(&m->creds); | |
138 | free(m); | |
139 | } | |
140 | ||
141 | static void *message_extend_fields(sd_bus_message *m, size_t align, size_t sz, bool add_offset) { | |
142 | void *op, *np; | |
143 | size_t old_size, new_size, start; | |
144 | ||
145 | assert(m); | |
146 | ||
147 | if (m->poisoned) | |
148 | return NULL; | |
149 | ||
e735f4d4 | 150 | old_size = sizeof(struct bus_header) + m->fields_size; |
60f067b4 JS |
151 | start = ALIGN_TO(old_size, align); |
152 | new_size = start + sz; | |
153 | ||
e735f4d4 MP |
154 | if (new_size < start || |
155 | new_size > (size_t) ((uint32_t) -1)) | |
156 | goto poison; | |
157 | ||
60f067b4 JS |
158 | if (old_size == new_size) |
159 | return (uint8_t*) m->header + old_size; | |
160 | ||
60f067b4 JS |
161 | if (m->free_header) { |
162 | np = realloc(m->header, ALIGN8(new_size)); | |
163 | if (!np) | |
164 | goto poison; | |
165 | } else { | |
5a920b42 | 166 | /* Initially, the header is allocated as part of |
60f067b4 JS |
167 | * the sd_bus_message itself, let's replace it by |
168 | * dynamic data */ | |
169 | ||
170 | np = malloc(ALIGN8(new_size)); | |
171 | if (!np) | |
172 | goto poison; | |
173 | ||
174 | memcpy(np, m->header, sizeof(struct bus_header)); | |
175 | } | |
176 | ||
177 | /* Zero out padding */ | |
178 | if (start > old_size) | |
179 | memzero((uint8_t*) np + old_size, start - old_size); | |
180 | ||
181 | op = m->header; | |
182 | m->header = np; | |
e735f4d4 | 183 | m->fields_size = new_size - sizeof(struct bus_header); |
60f067b4 JS |
184 | |
185 | /* Adjust quick access pointers */ | |
186 | m->path = adjust_pointer(m->path, op, old_size, m->header); | |
187 | m->interface = adjust_pointer(m->interface, op, old_size, m->header); | |
188 | m->member = adjust_pointer(m->member, op, old_size, m->header); | |
189 | m->destination = adjust_pointer(m->destination, op, old_size, m->header); | |
190 | m->sender = adjust_pointer(m->sender, op, old_size, m->header); | |
191 | m->error.name = adjust_pointer(m->error.name, op, old_size, m->header); | |
192 | ||
193 | m->free_header = true; | |
194 | ||
195 | if (add_offset) { | |
196 | if (m->n_header_offsets >= ELEMENTSOF(m->header_offsets)) | |
197 | goto poison; | |
198 | ||
199 | m->header_offsets[m->n_header_offsets++] = new_size - sizeof(struct bus_header); | |
200 | } | |
201 | ||
202 | return (uint8_t*) np + start; | |
203 | ||
204 | poison: | |
205 | m->poisoned = true; | |
206 | return NULL; | |
207 | } | |
208 | ||
209 | static int message_append_field_string( | |
210 | sd_bus_message *m, | |
e735f4d4 | 211 | uint64_t h, |
60f067b4 JS |
212 | char type, |
213 | const char *s, | |
214 | const char **ret) { | |
215 | ||
216 | size_t l; | |
217 | uint8_t *p; | |
218 | ||
219 | assert(m); | |
220 | ||
e735f4d4 MP |
221 | /* dbus1 only allows 8bit header field ids */ |
222 | if (h > 0xFF) | |
223 | return -EINVAL; | |
224 | ||
60f067b4 JS |
225 | /* dbus1 doesn't allow strings over 32bit, let's enforce this |
226 | * globally, to not risk convertability */ | |
227 | l = strlen(s); | |
228 | if (l > (size_t) (uint32_t) -1) | |
229 | return -EINVAL; | |
230 | ||
231 | /* Signature "(yv)" where the variant contains "s" */ | |
232 | ||
233 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
234 | ||
e735f4d4 MP |
235 | /* (field id 64bit, ((string + NUL) + NUL + signature string 's') */ |
236 | p = message_extend_fields(m, 8, 8 + l + 1 + 1 + 1, true); | |
60f067b4 JS |
237 | if (!p) |
238 | return -ENOMEM; | |
239 | ||
e735f4d4 | 240 | *((uint64_t*) p) = h; |
60f067b4 JS |
241 | memcpy(p+8, s, l); |
242 | p[8+l] = 0; | |
243 | p[8+l+1] = 0; | |
244 | p[8+l+2] = type; | |
245 | ||
246 | if (ret) | |
247 | *ret = (char*) p + 8; | |
248 | ||
249 | } else { | |
250 | /* (field id byte + (signature length + signature 's' + NUL) + (string length + string + NUL)) */ | |
251 | p = message_extend_fields(m, 8, 4 + 4 + l + 1, false); | |
252 | if (!p) | |
253 | return -ENOMEM; | |
254 | ||
e735f4d4 | 255 | p[0] = (uint8_t) h; |
60f067b4 JS |
256 | p[1] = 1; |
257 | p[2] = type; | |
258 | p[3] = 0; | |
259 | ||
260 | ((uint32_t*) p)[1] = l; | |
261 | memcpy(p + 8, s, l + 1); | |
262 | ||
263 | if (ret) | |
264 | *ret = (char*) p + 8; | |
265 | } | |
266 | ||
267 | return 0; | |
268 | } | |
269 | ||
270 | static int message_append_field_signature( | |
271 | sd_bus_message *m, | |
e735f4d4 | 272 | uint64_t h, |
60f067b4 JS |
273 | const char *s, |
274 | const char **ret) { | |
275 | ||
276 | size_t l; | |
277 | uint8_t *p; | |
278 | ||
279 | assert(m); | |
280 | ||
e735f4d4 MP |
281 | /* dbus1 only allows 8bit header field ids */ |
282 | if (h > 0xFF) | |
283 | return -EINVAL; | |
284 | ||
285 | /* dbus1 doesn't allow signatures over 8bit, let's enforce | |
60f067b4 JS |
286 | * this globally, to not risk convertability */ |
287 | l = strlen(s); | |
288 | if (l > 255) | |
289 | return -EINVAL; | |
290 | ||
291 | /* Signature "(yv)" where the variant contains "g" */ | |
292 | ||
293 | if (BUS_MESSAGE_IS_GVARIANT(m)) | |
294 | /* For gvariant the serialization is the same as for normal strings */ | |
295 | return message_append_field_string(m, h, 'g', s, ret); | |
296 | else { | |
297 | /* (field id byte + (signature length + signature 'g' + NUL) + (string length + string + NUL)) */ | |
298 | p = message_extend_fields(m, 8, 4 + 1 + l + 1, false); | |
299 | if (!p) | |
300 | return -ENOMEM; | |
301 | ||
e735f4d4 | 302 | p[0] = (uint8_t) h; |
60f067b4 JS |
303 | p[1] = 1; |
304 | p[2] = SD_BUS_TYPE_SIGNATURE; | |
305 | p[3] = 0; | |
306 | p[4] = l; | |
307 | memcpy(p + 5, s, l + 1); | |
308 | ||
309 | if (ret) | |
310 | *ret = (const char*) p + 5; | |
311 | } | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
e735f4d4 | 316 | static int message_append_field_uint32(sd_bus_message *m, uint64_t h, uint32_t x) { |
60f067b4 JS |
317 | uint8_t *p; |
318 | ||
319 | assert(m); | |
320 | ||
e735f4d4 MP |
321 | /* dbus1 only allows 8bit header field ids */ |
322 | if (h > 0xFF) | |
323 | return -EINVAL; | |
324 | ||
60f067b4 | 325 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
e735f4d4 | 326 | /* (field id 64bit + ((value + NUL + signature string 'u') */ |
60f067b4 | 327 | |
e735f4d4 | 328 | p = message_extend_fields(m, 8, 8 + 4 + 1 + 1, true); |
60f067b4 JS |
329 | if (!p) |
330 | return -ENOMEM; | |
331 | ||
e735f4d4 | 332 | *((uint64_t*) p) = h; |
60f067b4 JS |
333 | *((uint32_t*) (p + 8)) = x; |
334 | p[12] = 0; | |
335 | p[13] = 'u'; | |
336 | } else { | |
337 | /* (field id byte + (signature length + signature 'u' + NUL) + value) */ | |
338 | p = message_extend_fields(m, 8, 4 + 4, false); | |
339 | if (!p) | |
340 | return -ENOMEM; | |
341 | ||
e735f4d4 | 342 | p[0] = (uint8_t) h; |
60f067b4 | 343 | p[1] = 1; |
e735f4d4 | 344 | p[2] = 'u'; |
60f067b4 JS |
345 | p[3] = 0; |
346 | ||
347 | ((uint32_t*) p)[1] = x; | |
348 | } | |
349 | ||
350 | return 0; | |
351 | } | |
352 | ||
e735f4d4 MP |
353 | static int message_append_field_uint64(sd_bus_message *m, uint64_t h, uint64_t x) { |
354 | uint8_t *p; | |
355 | ||
356 | assert(m); | |
357 | ||
358 | /* dbus1 only allows 8bit header field ids */ | |
359 | if (h > 0xFF) | |
360 | return -EINVAL; | |
361 | ||
362 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
363 | /* (field id 64bit + ((value + NUL + signature string 't') */ | |
364 | ||
365 | p = message_extend_fields(m, 8, 8 + 8 + 1 + 1, true); | |
366 | if (!p) | |
367 | return -ENOMEM; | |
368 | ||
369 | *((uint64_t*) p) = h; | |
370 | *((uint64_t*) (p + 8)) = x; | |
371 | p[16] = 0; | |
372 | p[17] = 't'; | |
373 | } else { | |
374 | /* (field id byte + (signature length + signature 't' + NUL) + 4 byte padding + value) */ | |
375 | p = message_extend_fields(m, 8, 4 + 4 + 8, false); | |
376 | if (!p) | |
377 | return -ENOMEM; | |
378 | ||
379 | p[0] = (uint8_t) h; | |
380 | p[1] = 1; | |
381 | p[2] = 't'; | |
382 | p[3] = 0; | |
383 | p[4] = 0; | |
384 | p[5] = 0; | |
385 | p[6] = 0; | |
386 | p[7] = 0; | |
387 | ||
388 | ((uint64_t*) p)[1] = x; | |
389 | } | |
390 | ||
391 | return 0; | |
392 | } | |
393 | ||
394 | static int message_append_reply_cookie(sd_bus_message *m, uint64_t cookie) { | |
395 | assert(m); | |
396 | ||
397 | if (BUS_MESSAGE_IS_GVARIANT(m)) | |
398 | return message_append_field_uint64(m, BUS_MESSAGE_HEADER_REPLY_SERIAL, cookie); | |
399 | else { | |
400 | /* 64bit cookies are not supported on dbus1 */ | |
401 | if (cookie > 0xffffffffUL) | |
e3bff60a | 402 | return -EOPNOTSUPP; |
e735f4d4 MP |
403 | |
404 | return message_append_field_uint32(m, BUS_MESSAGE_HEADER_REPLY_SERIAL, (uint32_t) cookie); | |
405 | } | |
406 | } | |
407 | ||
60f067b4 JS |
408 | int bus_message_from_header( |
409 | sd_bus *bus, | |
e735f4d4 MP |
410 | void *header, |
411 | size_t header_accessible, | |
412 | void *footer, | |
413 | size_t footer_accessible, | |
414 | size_t message_size, | |
60f067b4 JS |
415 | int *fds, |
416 | unsigned n_fds, | |
60f067b4 JS |
417 | const char *label, |
418 | size_t extra, | |
419 | sd_bus_message **ret) { | |
420 | ||
e3bff60a | 421 | _cleanup_free_ sd_bus_message *m = NULL; |
60f067b4 JS |
422 | struct bus_header *h; |
423 | size_t a, label_sz; | |
424 | ||
425 | assert(bus); | |
e735f4d4 MP |
426 | assert(header || header_accessible <= 0); |
427 | assert(footer || footer_accessible <= 0); | |
60f067b4 JS |
428 | assert(fds || n_fds <= 0); |
429 | assert(ret); | |
430 | ||
e735f4d4 | 431 | if (header_accessible < sizeof(struct bus_header)) |
60f067b4 JS |
432 | return -EBADMSG; |
433 | ||
e735f4d4 MP |
434 | if (header_accessible > message_size) |
435 | return -EBADMSG; | |
436 | if (footer_accessible > message_size) | |
60f067b4 JS |
437 | return -EBADMSG; |
438 | ||
e735f4d4 | 439 | h = header; |
e3bff60a | 440 | if (!IN_SET(h->version, 1, 2)) |
60f067b4 JS |
441 | return -EBADMSG; |
442 | ||
443 | if (h->type == _SD_BUS_MESSAGE_TYPE_INVALID) | |
444 | return -EBADMSG; | |
445 | ||
e3bff60a | 446 | if (!IN_SET(h->endian, BUS_LITTLE_ENDIAN, BUS_BIG_ENDIAN)) |
60f067b4 JS |
447 | return -EBADMSG; |
448 | ||
e735f4d4 MP |
449 | /* Note that we are happy with unknown flags in the flags header! */ |
450 | ||
60f067b4 JS |
451 | a = ALIGN(sizeof(sd_bus_message)) + ALIGN(extra); |
452 | ||
453 | if (label) { | |
454 | label_sz = strlen(label); | |
455 | a += label_sz + 1; | |
456 | } | |
457 | ||
458 | m = malloc0(a); | |
459 | if (!m) | |
460 | return -ENOMEM; | |
461 | ||
462 | m->n_ref = 1; | |
463 | m->sealed = true; | |
e735f4d4 MP |
464 | m->header = header; |
465 | m->header_accessible = header_accessible; | |
466 | m->footer = footer; | |
467 | m->footer_accessible = footer_accessible; | |
468 | ||
469 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
470 | size_t ws; | |
471 | ||
472 | if (h->dbus2.cookie == 0) | |
473 | return -EBADMSG; | |
474 | ||
475 | /* dbus2 derives the sizes from the message size and | |
476 | the offset table at the end, since it is formatted as | |
477 | gvariant "yyyyuta{tv}v". Since the message itself is a | |
478 | structure with precisely to variable sized entries, | |
479 | there's only one offset in the table, which marks the | |
480 | end of the fields array. */ | |
481 | ||
482 | ws = bus_gvariant_determine_word_size(message_size, 0); | |
483 | if (footer_accessible < ws) | |
484 | return -EBADMSG; | |
485 | ||
486 | m->fields_size = bus_gvariant_read_word_le((uint8_t*) footer + footer_accessible - ws, ws); | |
487 | if (ALIGN8(m->fields_size) > message_size - ws) | |
488 | return -EBADMSG; | |
489 | if (m->fields_size < sizeof(struct bus_header)) | |
490 | return -EBADMSG; | |
491 | ||
492 | m->fields_size -= sizeof(struct bus_header); | |
493 | m->body_size = message_size - (sizeof(struct bus_header) + ALIGN8(m->fields_size)); | |
494 | } else { | |
495 | if (h->dbus1.serial == 0) | |
496 | return -EBADMSG; | |
497 | ||
498 | /* dbus1 has the sizes in the header */ | |
499 | m->fields_size = BUS_MESSAGE_BSWAP32(m, h->dbus1.fields_size); | |
500 | m->body_size = BUS_MESSAGE_BSWAP32(m, h->dbus1.body_size); | |
501 | ||
502 | if (sizeof(struct bus_header) + ALIGN8(m->fields_size) + m->body_size != message_size) | |
503 | return -EBADMSG; | |
504 | } | |
505 | ||
60f067b4 JS |
506 | m->fds = fds; |
507 | m->n_fds = n_fds; | |
508 | ||
60f067b4 JS |
509 | if (label) { |
510 | m->creds.label = (char*) m + ALIGN(sizeof(sd_bus_message)) + ALIGN(extra); | |
511 | memcpy(m->creds.label, label, label_sz + 1); | |
512 | ||
513 | m->creds.mask |= SD_BUS_CREDS_SELINUX_CONTEXT; | |
514 | } | |
515 | ||
516 | m->bus = sd_bus_ref(bus); | |
517 | *ret = m; | |
e3bff60a | 518 | m = NULL; |
60f067b4 JS |
519 | |
520 | return 0; | |
521 | } | |
522 | ||
523 | int bus_message_from_malloc( | |
524 | sd_bus *bus, | |
525 | void *buffer, | |
526 | size_t length, | |
527 | int *fds, | |
528 | unsigned n_fds, | |
60f067b4 JS |
529 | const char *label, |
530 | sd_bus_message **ret) { | |
531 | ||
532 | sd_bus_message *m; | |
533 | size_t sz; | |
534 | int r; | |
535 | ||
e735f4d4 MP |
536 | r = bus_message_from_header( |
537 | bus, | |
538 | buffer, length, /* in this case the initial bytes and the final bytes are the same */ | |
539 | buffer, length, | |
540 | length, | |
541 | fds, n_fds, | |
86f210e9 | 542 | label, |
e735f4d4 | 543 | 0, &m); |
60f067b4 JS |
544 | if (r < 0) |
545 | return r; | |
546 | ||
e735f4d4 | 547 | sz = length - sizeof(struct bus_header) - ALIGN8(m->fields_size); |
60f067b4 JS |
548 | if (sz > 0) { |
549 | m->n_body_parts = 1; | |
e735f4d4 | 550 | m->body.data = (uint8_t*) buffer + sizeof(struct bus_header) + ALIGN8(m->fields_size); |
60f067b4 JS |
551 | m->body.size = sz; |
552 | m->body.sealed = true; | |
553 | m->body.memfd = -1; | |
554 | } | |
555 | ||
556 | m->n_iovec = 1; | |
557 | m->iovec = m->iovec_fixed; | |
558 | m->iovec[0].iov_base = buffer; | |
559 | m->iovec[0].iov_len = length; | |
560 | ||
561 | r = bus_message_parse_fields(m); | |
562 | if (r < 0) | |
563 | goto fail; | |
564 | ||
565 | /* We take possession of the memory and fds now */ | |
566 | m->free_header = true; | |
567 | m->free_fds = true; | |
568 | ||
569 | *ret = m; | |
570 | return 0; | |
571 | ||
572 | fail: | |
573 | message_free(m); | |
574 | return r; | |
575 | } | |
576 | ||
52ad194e MB |
577 | _public_ int sd_bus_message_new( |
578 | sd_bus *bus, | |
579 | sd_bus_message **m, | |
580 | uint8_t type) { | |
60f067b4 | 581 | |
52ad194e | 582 | sd_bus_message *t; |
60f067b4 | 583 | |
52ad194e MB |
584 | assert_return(bus, -ENOTCONN); |
585 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
586 | assert_return(m, -EINVAL); | |
587 | assert_return(type < _SD_BUS_MESSAGE_TYPE_MAX, -EINVAL); | |
60f067b4 | 588 | |
52ad194e MB |
589 | t = malloc0(ALIGN(sizeof(sd_bus_message)) + sizeof(struct bus_header)); |
590 | if (!t) | |
591 | return -ENOMEM; | |
592 | ||
593 | t->n_ref = 1; | |
594 | t->header = (struct bus_header*) ((uint8_t*) t + ALIGN(sizeof(struct sd_bus_message))); | |
595 | t->header->endian = BUS_NATIVE_ENDIAN; | |
596 | t->header->type = type; | |
597 | t->header->version = bus->message_version; | |
598 | t->allow_fds = bus->can_fds || !IN_SET(bus->state, BUS_HELLO, BUS_RUNNING); | |
599 | t->root_container.need_offsets = BUS_MESSAGE_IS_GVARIANT(t); | |
600 | t->bus = sd_bus_ref(bus); | |
60f067b4 | 601 | |
e3bff60a | 602 | if (bus->allow_interactive_authorization) |
52ad194e | 603 | t->header->flags |= BUS_MESSAGE_ALLOW_INTERACTIVE_AUTHORIZATION; |
e3bff60a | 604 | |
52ad194e MB |
605 | *m = t; |
606 | return 0; | |
60f067b4 JS |
607 | } |
608 | ||
609 | _public_ int sd_bus_message_new_signal( | |
610 | sd_bus *bus, | |
611 | sd_bus_message **m, | |
612 | const char *path, | |
613 | const char *interface, | |
614 | const char *member) { | |
615 | ||
616 | sd_bus_message *t; | |
617 | int r; | |
618 | ||
619 | assert_return(bus, -ENOTCONN); | |
620 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
621 | assert_return(object_path_is_valid(path), -EINVAL); | |
622 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
623 | assert_return(member_name_is_valid(member), -EINVAL); | |
624 | assert_return(m, -EINVAL); | |
625 | ||
52ad194e MB |
626 | r = sd_bus_message_new(bus, &t, SD_BUS_MESSAGE_SIGNAL); |
627 | if (r < 0) | |
60f067b4 JS |
628 | return -ENOMEM; |
629 | ||
52ad194e MB |
630 | assert(t); |
631 | ||
60f067b4 JS |
632 | t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
633 | ||
634 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path); | |
635 | if (r < 0) | |
636 | goto fail; | |
637 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_INTERFACE, SD_BUS_TYPE_STRING, interface, &t->interface); | |
638 | if (r < 0) | |
639 | goto fail; | |
640 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_MEMBER, SD_BUS_TYPE_STRING, member, &t->member); | |
641 | if (r < 0) | |
642 | goto fail; | |
643 | ||
644 | *m = t; | |
645 | return 0; | |
646 | ||
647 | fail: | |
648 | sd_bus_message_unref(t); | |
649 | return r; | |
650 | } | |
651 | ||
652 | _public_ int sd_bus_message_new_method_call( | |
653 | sd_bus *bus, | |
654 | sd_bus_message **m, | |
655 | const char *destination, | |
656 | const char *path, | |
657 | const char *interface, | |
658 | const char *member) { | |
659 | ||
660 | sd_bus_message *t; | |
661 | int r; | |
662 | ||
663 | assert_return(bus, -ENOTCONN); | |
664 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
665 | assert_return(!destination || service_name_is_valid(destination), -EINVAL); | |
666 | assert_return(object_path_is_valid(path), -EINVAL); | |
667 | assert_return(!interface || interface_name_is_valid(interface), -EINVAL); | |
668 | assert_return(member_name_is_valid(member), -EINVAL); | |
669 | assert_return(m, -EINVAL); | |
670 | ||
52ad194e MB |
671 | r = sd_bus_message_new(bus, &t, SD_BUS_MESSAGE_METHOD_CALL); |
672 | if (r < 0) | |
60f067b4 JS |
673 | return -ENOMEM; |
674 | ||
52ad194e MB |
675 | assert(t); |
676 | ||
60f067b4 JS |
677 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path); |
678 | if (r < 0) | |
679 | goto fail; | |
680 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_MEMBER, SD_BUS_TYPE_STRING, member, &t->member); | |
681 | if (r < 0) | |
682 | goto fail; | |
683 | ||
684 | if (interface) { | |
685 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_INTERFACE, SD_BUS_TYPE_STRING, interface, &t->interface); | |
686 | if (r < 0) | |
687 | goto fail; | |
688 | } | |
689 | ||
690 | if (destination) { | |
691 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &t->destination); | |
692 | if (r < 0) | |
693 | goto fail; | |
694 | } | |
695 | ||
696 | *m = t; | |
697 | return 0; | |
698 | ||
699 | fail: | |
700 | message_free(t); | |
701 | return r; | |
702 | } | |
703 | ||
704 | static int message_new_reply( | |
705 | sd_bus_message *call, | |
706 | uint8_t type, | |
707 | sd_bus_message **m) { | |
708 | ||
709 | sd_bus_message *t; | |
52ad194e | 710 | uint64_t cookie; |
60f067b4 JS |
711 | int r; |
712 | ||
713 | assert_return(call, -EINVAL); | |
714 | assert_return(call->sealed, -EPERM); | |
715 | assert_return(call->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); | |
716 | assert_return(call->bus->state != BUS_UNSET, -ENOTCONN); | |
717 | assert_return(m, -EINVAL); | |
718 | ||
52ad194e MB |
719 | cookie = BUS_MESSAGE_COOKIE(call); |
720 | if (cookie == 0) | |
721 | return -EOPNOTSUPP; | |
722 | ||
723 | r = sd_bus_message_new(call->bus, &t, type); | |
724 | if (r < 0) | |
60f067b4 JS |
725 | return -ENOMEM; |
726 | ||
52ad194e | 727 | assert(t); |
60f067b4 | 728 | |
52ad194e MB |
729 | t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
730 | t->reply_cookie = cookie; | |
e735f4d4 | 731 | r = message_append_reply_cookie(t, t->reply_cookie); |
60f067b4 JS |
732 | if (r < 0) |
733 | goto fail; | |
734 | ||
735 | if (call->sender) { | |
736 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, call->sender, &t->destination); | |
737 | if (r < 0) | |
738 | goto fail; | |
739 | } | |
740 | ||
741 | t->dont_send = !!(call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED); | |
742 | t->enforced_reply_signature = call->enforced_reply_signature; | |
743 | ||
744 | *m = t; | |
745 | return 0; | |
746 | ||
747 | fail: | |
748 | message_free(t); | |
749 | return r; | |
750 | } | |
751 | ||
752 | _public_ int sd_bus_message_new_method_return( | |
753 | sd_bus_message *call, | |
754 | sd_bus_message **m) { | |
755 | ||
756 | return message_new_reply(call, SD_BUS_MESSAGE_METHOD_RETURN, m); | |
757 | } | |
758 | ||
759 | _public_ int sd_bus_message_new_method_error( | |
760 | sd_bus_message *call, | |
761 | sd_bus_message **m, | |
762 | const sd_bus_error *e) { | |
763 | ||
764 | sd_bus_message *t; | |
765 | int r; | |
766 | ||
767 | assert_return(sd_bus_error_is_set(e), -EINVAL); | |
768 | assert_return(m, -EINVAL); | |
769 | ||
770 | r = message_new_reply(call, SD_BUS_MESSAGE_METHOD_ERROR, &t); | |
771 | if (r < 0) | |
772 | return r; | |
773 | ||
774 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name); | |
775 | if (r < 0) | |
776 | goto fail; | |
777 | ||
778 | if (e->message) { | |
779 | r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message); | |
780 | if (r < 0) | |
781 | goto fail; | |
782 | } | |
783 | ||
784 | t->error._need_free = -1; | |
785 | ||
786 | *m = t; | |
787 | return 0; | |
788 | ||
789 | fail: | |
790 | message_free(t); | |
791 | return r; | |
792 | } | |
793 | ||
794 | _public_ int sd_bus_message_new_method_errorf( | |
795 | sd_bus_message *call, | |
796 | sd_bus_message **m, | |
797 | const char *name, | |
798 | const char *format, | |
799 | ...) { | |
800 | ||
4c89c718 | 801 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
60f067b4 JS |
802 | va_list ap; |
803 | ||
804 | assert_return(name, -EINVAL); | |
805 | assert_return(m, -EINVAL); | |
806 | ||
807 | va_start(ap, format); | |
808 | bus_error_setfv(&error, name, format, ap); | |
809 | va_end(ap); | |
810 | ||
811 | return sd_bus_message_new_method_error(call, m, &error); | |
812 | } | |
813 | ||
814 | _public_ int sd_bus_message_new_method_errno( | |
815 | sd_bus_message *call, | |
816 | sd_bus_message **m, | |
817 | int error, | |
818 | const sd_bus_error *p) { | |
819 | ||
4c89c718 | 820 | _cleanup_(sd_bus_error_free) sd_bus_error berror = SD_BUS_ERROR_NULL; |
60f067b4 JS |
821 | |
822 | if (sd_bus_error_is_set(p)) | |
823 | return sd_bus_message_new_method_error(call, m, p); | |
824 | ||
825 | sd_bus_error_set_errno(&berror, error); | |
826 | ||
827 | return sd_bus_message_new_method_error(call, m, &berror); | |
828 | } | |
829 | ||
830 | _public_ int sd_bus_message_new_method_errnof( | |
831 | sd_bus_message *call, | |
832 | sd_bus_message **m, | |
833 | int error, | |
834 | const char *format, | |
835 | ...) { | |
836 | ||
4c89c718 | 837 | _cleanup_(sd_bus_error_free) sd_bus_error berror = SD_BUS_ERROR_NULL; |
60f067b4 JS |
838 | va_list ap; |
839 | ||
840 | va_start(ap, format); | |
e735f4d4 | 841 | sd_bus_error_set_errnofv(&berror, error, format, ap); |
60f067b4 JS |
842 | va_end(ap); |
843 | ||
844 | return sd_bus_message_new_method_error(call, m, &berror); | |
845 | } | |
846 | ||
e735f4d4 MP |
847 | void bus_message_set_sender_local(sd_bus *bus, sd_bus_message *m) { |
848 | assert(bus); | |
849 | assert(m); | |
850 | ||
851 | m->sender = m->creds.unique_name = (char*) "org.freedesktop.DBus.Local"; | |
852 | m->creds.well_known_names_local = true; | |
853 | m->creds.mask |= (SD_BUS_CREDS_UNIQUE_NAME|SD_BUS_CREDS_WELL_KNOWN_NAMES) & bus->creds_mask; | |
854 | } | |
855 | ||
856 | void bus_message_set_sender_driver(sd_bus *bus, sd_bus_message *m) { | |
857 | assert(bus); | |
858 | assert(m); | |
859 | ||
860 | m->sender = m->creds.unique_name = (char*) "org.freedesktop.DBus"; | |
861 | m->creds.well_known_names_driver = true; | |
862 | m->creds.mask |= (SD_BUS_CREDS_UNIQUE_NAME|SD_BUS_CREDS_WELL_KNOWN_NAMES) & bus->creds_mask; | |
863 | } | |
864 | ||
60f067b4 JS |
865 | int bus_message_new_synthetic_error( |
866 | sd_bus *bus, | |
867 | uint64_t cookie, | |
868 | const sd_bus_error *e, | |
869 | sd_bus_message **m) { | |
870 | ||
871 | sd_bus_message *t; | |
872 | int r; | |
873 | ||
874 | assert(bus); | |
875 | assert(sd_bus_error_is_set(e)); | |
876 | assert(m); | |
877 | ||
52ad194e MB |
878 | r = sd_bus_message_new(bus, &t, SD_BUS_MESSAGE_METHOD_ERROR); |
879 | if (r < 0) | |
60f067b4 JS |
880 | return -ENOMEM; |
881 | ||
52ad194e MB |
882 | assert(t); |
883 | ||
60f067b4 JS |
884 | t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
885 | t->reply_cookie = cookie; | |
886 | ||
e735f4d4 | 887 | r = message_append_reply_cookie(t, t->reply_cookie); |
60f067b4 JS |
888 | if (r < 0) |
889 | goto fail; | |
890 | ||
891 | if (bus && bus->unique_name) { | |
892 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, bus->unique_name, &t->destination); | |
893 | if (r < 0) | |
894 | goto fail; | |
895 | } | |
896 | ||
897 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name); | |
898 | if (r < 0) | |
899 | goto fail; | |
900 | ||
901 | if (e->message) { | |
902 | r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message); | |
903 | if (r < 0) | |
904 | goto fail; | |
905 | } | |
906 | ||
907 | t->error._need_free = -1; | |
908 | ||
e735f4d4 MP |
909 | bus_message_set_sender_driver(bus, t); |
910 | ||
60f067b4 JS |
911 | *m = t; |
912 | return 0; | |
913 | ||
914 | fail: | |
915 | message_free(t); | |
916 | return r; | |
917 | } | |
918 | ||
919 | _public_ sd_bus_message* sd_bus_message_ref(sd_bus_message *m) { | |
4c89c718 MP |
920 | |
921 | if (!m) | |
922 | return NULL; | |
60f067b4 JS |
923 | |
924 | assert(m->n_ref > 0); | |
925 | m->n_ref++; | |
926 | ||
927 | return m; | |
928 | } | |
929 | ||
930 | _public_ sd_bus_message* sd_bus_message_unref(sd_bus_message *m) { | |
931 | ||
932 | if (!m) | |
933 | return NULL; | |
934 | ||
935 | assert(m->n_ref > 0); | |
936 | m->n_ref--; | |
937 | ||
e842803a MB |
938 | if (m->n_ref > 0) |
939 | return NULL; | |
60f067b4 | 940 | |
e842803a | 941 | message_free(m); |
60f067b4 JS |
942 | return NULL; |
943 | } | |
944 | ||
945 | _public_ int sd_bus_message_get_type(sd_bus_message *m, uint8_t *type) { | |
946 | assert_return(m, -EINVAL); | |
947 | assert_return(type, -EINVAL); | |
948 | ||
949 | *type = m->header->type; | |
950 | return 0; | |
951 | } | |
952 | ||
953 | _public_ int sd_bus_message_get_cookie(sd_bus_message *m, uint64_t *cookie) { | |
e735f4d4 MP |
954 | uint64_t c; |
955 | ||
60f067b4 JS |
956 | assert_return(m, -EINVAL); |
957 | assert_return(cookie, -EINVAL); | |
e735f4d4 MP |
958 | |
959 | c = BUS_MESSAGE_COOKIE(m); | |
960 | if (c == 0) | |
961 | return -ENODATA; | |
60f067b4 JS |
962 | |
963 | *cookie = BUS_MESSAGE_COOKIE(m); | |
964 | return 0; | |
965 | } | |
966 | ||
967 | _public_ int sd_bus_message_get_reply_cookie(sd_bus_message *m, uint64_t *cookie) { | |
968 | assert_return(m, -EINVAL); | |
969 | assert_return(cookie, -EINVAL); | |
e735f4d4 MP |
970 | |
971 | if (m->reply_cookie == 0) | |
972 | return -ENODATA; | |
60f067b4 JS |
973 | |
974 | *cookie = m->reply_cookie; | |
975 | return 0; | |
976 | } | |
977 | ||
978 | _public_ int sd_bus_message_get_expect_reply(sd_bus_message *m) { | |
979 | assert_return(m, -EINVAL); | |
980 | ||
981 | return m->header->type == SD_BUS_MESSAGE_METHOD_CALL && | |
982 | !(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED); | |
983 | } | |
984 | ||
985 | _public_ int sd_bus_message_get_auto_start(sd_bus_message *m) { | |
986 | assert_return(m, -EINVAL); | |
987 | ||
988 | return !(m->header->flags & BUS_MESSAGE_NO_AUTO_START); | |
989 | } | |
990 | ||
5eef597e MP |
991 | _public_ int sd_bus_message_get_allow_interactive_authorization(sd_bus_message *m) { |
992 | assert_return(m, -EINVAL); | |
993 | ||
994 | return m->header->type == SD_BUS_MESSAGE_METHOD_CALL && | |
995 | (m->header->flags & BUS_MESSAGE_ALLOW_INTERACTIVE_AUTHORIZATION); | |
996 | } | |
997 | ||
60f067b4 JS |
998 | _public_ const char *sd_bus_message_get_path(sd_bus_message *m) { |
999 | assert_return(m, NULL); | |
1000 | ||
1001 | return m->path; | |
1002 | } | |
1003 | ||
1004 | _public_ const char *sd_bus_message_get_interface(sd_bus_message *m) { | |
1005 | assert_return(m, NULL); | |
1006 | ||
1007 | return m->interface; | |
1008 | } | |
1009 | ||
1010 | _public_ const char *sd_bus_message_get_member(sd_bus_message *m) { | |
1011 | assert_return(m, NULL); | |
1012 | ||
1013 | return m->member; | |
1014 | } | |
1015 | ||
1016 | _public_ const char *sd_bus_message_get_destination(sd_bus_message *m) { | |
1017 | assert_return(m, NULL); | |
1018 | ||
1019 | return m->destination; | |
1020 | } | |
1021 | ||
1022 | _public_ const char *sd_bus_message_get_sender(sd_bus_message *m) { | |
1023 | assert_return(m, NULL); | |
1024 | ||
1025 | return m->sender; | |
1026 | } | |
1027 | ||
1028 | _public_ const sd_bus_error *sd_bus_message_get_error(sd_bus_message *m) { | |
1029 | assert_return(m, NULL); | |
d9dfd233 MP |
1030 | |
1031 | if (!sd_bus_error_is_set(&m->error)) | |
1032 | return NULL; | |
60f067b4 JS |
1033 | |
1034 | return &m->error; | |
1035 | } | |
1036 | ||
1037 | _public_ int sd_bus_message_get_monotonic_usec(sd_bus_message *m, uint64_t *usec) { | |
1038 | assert_return(m, -EINVAL); | |
1039 | assert_return(usec, -EINVAL); | |
1040 | ||
1041 | if (m->monotonic <= 0) | |
1042 | return -ENODATA; | |
1043 | ||
1044 | *usec = m->monotonic; | |
1045 | return 0; | |
1046 | } | |
1047 | ||
1048 | _public_ int sd_bus_message_get_realtime_usec(sd_bus_message *m, uint64_t *usec) { | |
1049 | assert_return(m, -EINVAL); | |
1050 | assert_return(usec, -EINVAL); | |
1051 | ||
1052 | if (m->realtime <= 0) | |
1053 | return -ENODATA; | |
1054 | ||
1055 | *usec = m->realtime; | |
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | _public_ int sd_bus_message_get_seqnum(sd_bus_message *m, uint64_t *seqnum) { | |
1060 | assert_return(m, -EINVAL); | |
1061 | assert_return(seqnum, -EINVAL); | |
1062 | ||
1063 | if (m->seqnum <= 0) | |
1064 | return -ENODATA; | |
1065 | ||
1066 | *seqnum = m->seqnum; | |
1067 | return 0; | |
1068 | } | |
1069 | ||
1070 | _public_ sd_bus_creds *sd_bus_message_get_creds(sd_bus_message *m) { | |
1071 | assert_return(m, NULL); | |
1072 | ||
1073 | if (m->creds.mask == 0) | |
1074 | return NULL; | |
1075 | ||
1076 | return &m->creds; | |
1077 | } | |
1078 | ||
e735f4d4 MP |
1079 | _public_ int sd_bus_message_is_signal( |
1080 | sd_bus_message *m, | |
1081 | const char *interface, | |
1082 | const char *member) { | |
1083 | ||
60f067b4 JS |
1084 | assert_return(m, -EINVAL); |
1085 | ||
1086 | if (m->header->type != SD_BUS_MESSAGE_SIGNAL) | |
1087 | return 0; | |
1088 | ||
1089 | if (interface && (!m->interface || !streq(m->interface, interface))) | |
1090 | return 0; | |
1091 | ||
1092 | if (member && (!m->member || !streq(m->member, member))) | |
1093 | return 0; | |
1094 | ||
1095 | return 1; | |
1096 | } | |
1097 | ||
e735f4d4 MP |
1098 | _public_ int sd_bus_message_is_method_call( |
1099 | sd_bus_message *m, | |
1100 | const char *interface, | |
1101 | const char *member) { | |
1102 | ||
60f067b4 JS |
1103 | assert_return(m, -EINVAL); |
1104 | ||
1105 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
1106 | return 0; | |
1107 | ||
1108 | if (interface && (!m->interface || !streq(m->interface, interface))) | |
1109 | return 0; | |
1110 | ||
1111 | if (member && (!m->member || !streq(m->member, member))) | |
1112 | return 0; | |
1113 | ||
1114 | return 1; | |
1115 | } | |
1116 | ||
1117 | _public_ int sd_bus_message_is_method_error(sd_bus_message *m, const char *name) { | |
1118 | assert_return(m, -EINVAL); | |
1119 | ||
1120 | if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
1121 | return 0; | |
1122 | ||
1123 | if (name && (!m->error.name || !streq(m->error.name, name))) | |
1124 | return 0; | |
1125 | ||
1126 | return 1; | |
1127 | } | |
1128 | ||
1129 | _public_ int sd_bus_message_set_expect_reply(sd_bus_message *m, int b) { | |
1130 | assert_return(m, -EINVAL); | |
1131 | assert_return(!m->sealed, -EPERM); | |
1132 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EPERM); | |
1133 | ||
aa27b158 | 1134 | SET_FLAG(m->header->flags, BUS_MESSAGE_NO_REPLY_EXPECTED, !b); |
60f067b4 JS |
1135 | |
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | _public_ int sd_bus_message_set_auto_start(sd_bus_message *m, int b) { | |
1140 | assert_return(m, -EINVAL); | |
1141 | assert_return(!m->sealed, -EPERM); | |
1142 | ||
aa27b158 | 1143 | SET_FLAG(m->header->flags, BUS_MESSAGE_NO_AUTO_START, !b); |
60f067b4 JS |
1144 | |
1145 | return 0; | |
1146 | } | |
1147 | ||
5eef597e MP |
1148 | _public_ int sd_bus_message_set_allow_interactive_authorization(sd_bus_message *m, int b) { |
1149 | assert_return(m, -EINVAL); | |
1150 | assert_return(!m->sealed, -EPERM); | |
1151 | ||
aa27b158 | 1152 | SET_FLAG(m->header->flags, BUS_MESSAGE_ALLOW_INTERACTIVE_AUTHORIZATION, b); |
5eef597e MP |
1153 | |
1154 | return 0; | |
1155 | } | |
1156 | ||
60f067b4 JS |
1157 | static struct bus_container *message_get_container(sd_bus_message *m) { |
1158 | assert(m); | |
1159 | ||
1160 | if (m->n_containers == 0) | |
1161 | return &m->root_container; | |
1162 | ||
1163 | assert(m->containers); | |
1164 | return m->containers + m->n_containers - 1; | |
1165 | } | |
1166 | ||
1167 | struct bus_body_part *message_append_part(sd_bus_message *m) { | |
1168 | struct bus_body_part *part; | |
1169 | ||
1170 | assert(m); | |
1171 | ||
1172 | if (m->poisoned) | |
1173 | return NULL; | |
1174 | ||
1175 | if (m->n_body_parts <= 0) { | |
1176 | part = &m->body; | |
1177 | zero(*part); | |
1178 | } else { | |
1179 | assert(m->body_end); | |
1180 | ||
1181 | part = new0(struct bus_body_part, 1); | |
1182 | if (!part) { | |
1183 | m->poisoned = true; | |
1184 | return NULL; | |
1185 | } | |
1186 | ||
1187 | m->body_end->next = part; | |
1188 | } | |
1189 | ||
1190 | part->memfd = -1; | |
1191 | m->body_end = part; | |
aa27b158 | 1192 | m->n_body_parts++; |
60f067b4 JS |
1193 | |
1194 | return part; | |
1195 | } | |
1196 | ||
1197 | static void part_zero(struct bus_body_part *part, size_t sz) { | |
1198 | assert(part); | |
1199 | assert(sz > 0); | |
1200 | assert(sz < 8); | |
1201 | ||
1202 | /* All other fields can be left in their defaults */ | |
1203 | assert(!part->data); | |
1204 | assert(part->memfd < 0); | |
1205 | ||
1206 | part->size = sz; | |
1207 | part->is_zero = true; | |
1208 | part->sealed = true; | |
1209 | } | |
1210 | ||
1211 | static int part_make_space( | |
1212 | struct sd_bus_message *m, | |
1213 | struct bus_body_part *part, | |
1214 | size_t sz, | |
1215 | void **q) { | |
1216 | ||
1217 | void *n; | |
60f067b4 JS |
1218 | |
1219 | assert(m); | |
1220 | assert(part); | |
1221 | assert(!part->sealed); | |
1222 | ||
1223 | if (m->poisoned) | |
1224 | return -ENOMEM; | |
1225 | ||
f5e65279 MB |
1226 | if (part->allocated == 0 || sz > part->allocated) { |
1227 | size_t new_allocated; | |
60f067b4 | 1228 | |
f5e65279 MB |
1229 | new_allocated = sz > 0 ? 2 * sz : 64; |
1230 | n = realloc(part->data, new_allocated); | |
1231 | if (!n) { | |
1232 | m->poisoned = true; | |
1233 | return -ENOMEM; | |
60f067b4 JS |
1234 | } |
1235 | ||
f5e65279 MB |
1236 | part->data = n; |
1237 | part->allocated = new_allocated; | |
1238 | part->free_this = true; | |
60f067b4 JS |
1239 | } |
1240 | ||
1241 | if (q) | |
1242 | *q = part->data ? (uint8_t*) part->data + part->size : NULL; | |
1243 | ||
1244 | part->size = sz; | |
1245 | return 0; | |
1246 | } | |
1247 | ||
1248 | static int message_add_offset(sd_bus_message *m, size_t offset) { | |
1249 | struct bus_container *c; | |
1250 | ||
1251 | assert(m); | |
1252 | assert(BUS_MESSAGE_IS_GVARIANT(m)); | |
1253 | ||
1254 | /* Add offset to current container, unless this is the first | |
1255 | * item in it, which will have the 0 offset, which we can | |
1256 | * ignore. */ | |
1257 | c = message_get_container(m); | |
1258 | ||
1259 | if (!c->need_offsets) | |
1260 | return 0; | |
1261 | ||
1262 | if (!GREEDY_REALLOC(c->offsets, c->offsets_allocated, c->n_offsets + 1)) | |
1263 | return -ENOMEM; | |
1264 | ||
1265 | c->offsets[c->n_offsets++] = offset; | |
1266 | return 0; | |
1267 | } | |
1268 | ||
1269 | static void message_extend_containers(sd_bus_message *m, size_t expand) { | |
1270 | struct bus_container *c; | |
1271 | ||
1272 | assert(m); | |
1273 | ||
1274 | if (expand <= 0) | |
1275 | return; | |
1276 | ||
1277 | /* Update counters */ | |
1278 | for (c = m->containers; c < m->containers + m->n_containers; c++) { | |
1279 | ||
1280 | if (c->array_size) | |
1281 | *c->array_size += expand; | |
1282 | } | |
1283 | } | |
1284 | ||
e735f4d4 MP |
1285 | static void *message_extend_body( |
1286 | sd_bus_message *m, | |
1287 | size_t align, | |
1288 | size_t sz, | |
1289 | bool add_offset, | |
1290 | bool force_inline) { | |
1291 | ||
60f067b4 JS |
1292 | size_t start_body, end_body, padding, added; |
1293 | void *p; | |
1294 | int r; | |
1295 | ||
1296 | assert(m); | |
1297 | assert(align > 0); | |
1298 | assert(!m->sealed); | |
1299 | ||
1300 | if (m->poisoned) | |
1301 | return NULL; | |
1302 | ||
e735f4d4 | 1303 | start_body = ALIGN_TO((size_t) m->body_size, align); |
60f067b4 JS |
1304 | end_body = start_body + sz; |
1305 | ||
e735f4d4 | 1306 | padding = start_body - m->body_size; |
60f067b4 JS |
1307 | added = padding + sz; |
1308 | ||
1309 | /* Check for 32bit overflows */ | |
e735f4d4 MP |
1310 | if (end_body > (size_t) ((uint32_t) -1) || |
1311 | end_body < start_body) { | |
60f067b4 JS |
1312 | m->poisoned = true; |
1313 | return NULL; | |
1314 | } | |
1315 | ||
1316 | if (added > 0) { | |
1317 | struct bus_body_part *part = NULL; | |
1318 | bool add_new_part; | |
1319 | ||
1320 | add_new_part = | |
1321 | m->n_body_parts <= 0 || | |
1322 | m->body_end->sealed || | |
e735f4d4 MP |
1323 | (padding != ALIGN_TO(m->body_end->size, align) - m->body_end->size) || |
1324 | (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 */ | |
60f067b4 JS |
1325 | |
1326 | if (add_new_part) { | |
1327 | if (padding > 0) { | |
1328 | part = message_append_part(m); | |
1329 | if (!part) | |
1330 | return NULL; | |
1331 | ||
1332 | part_zero(part, padding); | |
1333 | } | |
1334 | ||
1335 | part = message_append_part(m); | |
1336 | if (!part) | |
1337 | return NULL; | |
1338 | ||
1339 | r = part_make_space(m, part, sz, &p); | |
1340 | if (r < 0) | |
1341 | return NULL; | |
1342 | } else { | |
1343 | struct bus_container *c; | |
1344 | void *op; | |
1345 | size_t os, start_part, end_part; | |
1346 | ||
1347 | part = m->body_end; | |
1348 | op = part->data; | |
1349 | os = part->size; | |
1350 | ||
1351 | start_part = ALIGN_TO(part->size, align); | |
1352 | end_part = start_part + sz; | |
1353 | ||
1354 | r = part_make_space(m, part, end_part, &p); | |
1355 | if (r < 0) | |
1356 | return NULL; | |
1357 | ||
1358 | if (padding > 0) { | |
1359 | memzero(p, padding); | |
1360 | p = (uint8_t*) p + padding; | |
1361 | } | |
1362 | ||
1363 | /* Readjust pointers */ | |
1364 | for (c = m->containers; c < m->containers + m->n_containers; c++) | |
1365 | c->array_size = adjust_pointer(c->array_size, op, os, part->data); | |
1366 | ||
1367 | m->error.message = (const char*) adjust_pointer(m->error.message, op, os, part->data); | |
1368 | } | |
1369 | } else | |
1370 | /* Return something that is not NULL and is aligned */ | |
1371 | p = (uint8_t *) NULL + align; | |
1372 | ||
e735f4d4 | 1373 | m->body_size = end_body; |
60f067b4 JS |
1374 | message_extend_containers(m, added); |
1375 | ||
1376 | if (add_offset) { | |
1377 | r = message_add_offset(m, end_body); | |
1378 | if (r < 0) { | |
1379 | m->poisoned = true; | |
1380 | return NULL; | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | return p; | |
1385 | } | |
1386 | ||
1387 | static int message_push_fd(sd_bus_message *m, int fd) { | |
1388 | int *f, copy; | |
1389 | ||
1390 | assert(m); | |
1391 | ||
1392 | if (fd < 0) | |
1393 | return -EINVAL; | |
1394 | ||
1395 | if (!m->allow_fds) | |
e3bff60a | 1396 | return -EOPNOTSUPP; |
60f067b4 JS |
1397 | |
1398 | copy = fcntl(fd, F_DUPFD_CLOEXEC, 3); | |
1399 | if (copy < 0) | |
1400 | return -errno; | |
1401 | ||
1402 | f = realloc(m->fds, sizeof(int) * (m->n_fds + 1)); | |
1403 | if (!f) { | |
1404 | m->poisoned = true; | |
1405 | safe_close(copy); | |
1406 | return -ENOMEM; | |
1407 | } | |
1408 | ||
1409 | m->fds = f; | |
1410 | m->fds[m->n_fds] = copy; | |
1411 | m->free_fds = true; | |
1412 | ||
1413 | return copy; | |
1414 | } | |
1415 | ||
1416 | int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored) { | |
1417 | _cleanup_close_ int fd = -1; | |
1418 | struct bus_container *c; | |
1419 | ssize_t align, sz; | |
1420 | void *a; | |
1421 | ||
1422 | assert_return(m, -EINVAL); | |
1423 | assert_return(!m->sealed, -EPERM); | |
1424 | assert_return(bus_type_is_basic(type), -EINVAL); | |
1425 | assert_return(!m->poisoned, -ESTALE); | |
1426 | ||
1427 | c = message_get_container(m); | |
1428 | ||
1429 | if (c->signature && c->signature[c->index]) { | |
1430 | /* Container signature is already set */ | |
1431 | ||
1432 | if (c->signature[c->index] != type) | |
1433 | return -ENXIO; | |
1434 | } else { | |
1435 | char *e; | |
1436 | ||
e735f4d4 | 1437 | /* Maybe we can append to the signature? But only if this is the top-level container */ |
60f067b4 JS |
1438 | if (c->enclosing != 0) |
1439 | return -ENXIO; | |
1440 | ||
1441 | e = strextend(&c->signature, CHAR_TO_STR(type), NULL); | |
1442 | if (!e) { | |
1443 | m->poisoned = true; | |
1444 | return -ENOMEM; | |
1445 | } | |
1446 | } | |
1447 | ||
1448 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
1449 | uint8_t u8; | |
1450 | uint32_t u32; | |
1451 | ||
1452 | switch (type) { | |
1453 | ||
1454 | case SD_BUS_TYPE_SIGNATURE: | |
1455 | case SD_BUS_TYPE_STRING: | |
1456 | p = strempty(p); | |
1457 | ||
52ad194e | 1458 | _fallthrough_; |
60f067b4 JS |
1459 | case SD_BUS_TYPE_OBJECT_PATH: |
1460 | if (!p) | |
1461 | return -EINVAL; | |
1462 | ||
1463 | align = 1; | |
1464 | sz = strlen(p) + 1; | |
1465 | break; | |
1466 | ||
1467 | case SD_BUS_TYPE_BOOLEAN: | |
1468 | ||
1469 | u8 = p && *(int*) p; | |
1470 | p = &u8; | |
1471 | ||
1472 | align = sz = 1; | |
1473 | break; | |
1474 | ||
1475 | case SD_BUS_TYPE_UNIX_FD: | |
1476 | ||
1477 | if (!p) | |
1478 | return -EINVAL; | |
1479 | ||
1480 | fd = message_push_fd(m, *(int*) p); | |
1481 | if (fd < 0) | |
1482 | return fd; | |
1483 | ||
1484 | u32 = m->n_fds; | |
1485 | p = &u32; | |
1486 | ||
1487 | align = sz = 4; | |
1488 | break; | |
1489 | ||
1490 | default: | |
1491 | align = bus_gvariant_get_alignment(CHAR_TO_STR(type)); | |
1492 | sz = bus_gvariant_get_size(CHAR_TO_STR(type)); | |
1493 | break; | |
1494 | } | |
1495 | ||
1496 | assert(align > 0); | |
1497 | assert(sz > 0); | |
1498 | ||
e735f4d4 | 1499 | a = message_extend_body(m, align, sz, true, false); |
60f067b4 JS |
1500 | if (!a) |
1501 | return -ENOMEM; | |
1502 | ||
1503 | memcpy(a, p, sz); | |
1504 | ||
1505 | if (stored) | |
1506 | *stored = (const uint8_t*) a; | |
1507 | ||
1508 | } else { | |
1509 | uint32_t u32; | |
1510 | ||
1511 | switch (type) { | |
1512 | ||
1513 | case SD_BUS_TYPE_STRING: | |
1514 | /* To make things easy we'll serialize a NULL string | |
1515 | * into the empty string */ | |
1516 | p = strempty(p); | |
1517 | ||
52ad194e | 1518 | _fallthrough_; |
60f067b4 JS |
1519 | case SD_BUS_TYPE_OBJECT_PATH: |
1520 | ||
1521 | if (!p) | |
1522 | return -EINVAL; | |
1523 | ||
1524 | align = 4; | |
1525 | sz = 4 + strlen(p) + 1; | |
1526 | break; | |
1527 | ||
1528 | case SD_BUS_TYPE_SIGNATURE: | |
1529 | ||
1530 | p = strempty(p); | |
1531 | ||
1532 | align = 1; | |
1533 | sz = 1 + strlen(p) + 1; | |
1534 | break; | |
1535 | ||
1536 | case SD_BUS_TYPE_BOOLEAN: | |
1537 | ||
1538 | u32 = p && *(int*) p; | |
1539 | p = &u32; | |
1540 | ||
1541 | align = sz = 4; | |
1542 | break; | |
1543 | ||
1544 | case SD_BUS_TYPE_UNIX_FD: | |
1545 | ||
1546 | if (!p) | |
1547 | return -EINVAL; | |
1548 | ||
1549 | fd = message_push_fd(m, *(int*) p); | |
1550 | if (fd < 0) | |
1551 | return fd; | |
1552 | ||
1553 | u32 = m->n_fds; | |
1554 | p = &u32; | |
1555 | ||
1556 | align = sz = 4; | |
1557 | break; | |
1558 | ||
1559 | default: | |
1560 | align = bus_type_get_alignment(type); | |
1561 | sz = bus_type_get_size(type); | |
1562 | break; | |
1563 | } | |
1564 | ||
1565 | assert(align > 0); | |
1566 | assert(sz > 0); | |
1567 | ||
e735f4d4 | 1568 | a = message_extend_body(m, align, sz, false, false); |
60f067b4 JS |
1569 | if (!a) |
1570 | return -ENOMEM; | |
1571 | ||
f5e65279 | 1572 | if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH)) { |
60f067b4 JS |
1573 | *(uint32_t*) a = sz - 5; |
1574 | memcpy((uint8_t*) a + 4, p, sz - 4); | |
1575 | ||
1576 | if (stored) | |
1577 | *stored = (const uint8_t*) a + 4; | |
1578 | ||
1579 | } else if (type == SD_BUS_TYPE_SIGNATURE) { | |
1580 | *(uint8_t*) a = sz - 2; | |
1581 | memcpy((uint8_t*) a + 1, p, sz - 1); | |
1582 | ||
1583 | if (stored) | |
1584 | *stored = (const uint8_t*) a + 1; | |
1585 | } else { | |
1586 | memcpy(a, p, sz); | |
1587 | ||
1588 | if (stored) | |
1589 | *stored = a; | |
1590 | } | |
1591 | } | |
1592 | ||
1593 | if (type == SD_BUS_TYPE_UNIX_FD) | |
aa27b158 | 1594 | m->n_fds++; |
60f067b4 JS |
1595 | |
1596 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1597 | c->index++; | |
1598 | ||
1599 | fd = -1; | |
1600 | return 0; | |
1601 | } | |
1602 | ||
1603 | _public_ int sd_bus_message_append_basic(sd_bus_message *m, char type, const void *p) { | |
1604 | return message_append_basic(m, type, p, NULL); | |
1605 | } | |
1606 | ||
1607 | _public_ int sd_bus_message_append_string_space( | |
1608 | sd_bus_message *m, | |
1609 | size_t size, | |
1610 | char **s) { | |
1611 | ||
1612 | struct bus_container *c; | |
1613 | void *a; | |
1614 | ||
1615 | assert_return(m, -EINVAL); | |
1616 | assert_return(s, -EINVAL); | |
1617 | assert_return(!m->sealed, -EPERM); | |
1618 | assert_return(!m->poisoned, -ESTALE); | |
1619 | ||
1620 | c = message_get_container(m); | |
1621 | ||
1622 | if (c->signature && c->signature[c->index]) { | |
1623 | /* Container signature is already set */ | |
1624 | ||
1625 | if (c->signature[c->index] != SD_BUS_TYPE_STRING) | |
1626 | return -ENXIO; | |
1627 | } else { | |
1628 | char *e; | |
1629 | ||
e735f4d4 | 1630 | /* Maybe we can append to the signature? But only if this is the top-level container */ |
60f067b4 JS |
1631 | if (c->enclosing != 0) |
1632 | return -ENXIO; | |
1633 | ||
1634 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL); | |
1635 | if (!e) { | |
1636 | m->poisoned = true; | |
1637 | return -ENOMEM; | |
1638 | } | |
1639 | } | |
1640 | ||
1641 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
e735f4d4 | 1642 | a = message_extend_body(m, 1, size + 1, true, false); |
60f067b4 JS |
1643 | if (!a) |
1644 | return -ENOMEM; | |
1645 | ||
1646 | *s = a; | |
1647 | } else { | |
e735f4d4 | 1648 | a = message_extend_body(m, 4, 4 + size + 1, false, false); |
60f067b4 JS |
1649 | if (!a) |
1650 | return -ENOMEM; | |
1651 | ||
1652 | *(uint32_t*) a = size; | |
1653 | *s = (char*) a + 4; | |
1654 | } | |
1655 | ||
1656 | (*s)[size] = 0; | |
1657 | ||
1658 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1659 | c->index++; | |
1660 | ||
1661 | return 0; | |
1662 | } | |
1663 | ||
1664 | _public_ int sd_bus_message_append_string_iovec( | |
1665 | sd_bus_message *m, | |
1666 | const struct iovec *iov, | |
1667 | unsigned n) { | |
1668 | ||
1669 | size_t size; | |
1670 | unsigned i; | |
1671 | char *p; | |
1672 | int r; | |
1673 | ||
1674 | assert_return(m, -EINVAL); | |
1675 | assert_return(!m->sealed, -EPERM); | |
1676 | assert_return(iov || n == 0, -EINVAL); | |
1677 | assert_return(!m->poisoned, -ESTALE); | |
1678 | ||
1679 | size = IOVEC_TOTAL_SIZE(iov, n); | |
1680 | ||
1681 | r = sd_bus_message_append_string_space(m, size, &p); | |
1682 | if (r < 0) | |
1683 | return r; | |
1684 | ||
1685 | for (i = 0; i < n; i++) { | |
1686 | ||
1687 | if (iov[i].iov_base) | |
1688 | memcpy(p, iov[i].iov_base, iov[i].iov_len); | |
1689 | else | |
1690 | memset(p, ' ', iov[i].iov_len); | |
1691 | ||
1692 | p += iov[i].iov_len; | |
1693 | } | |
1694 | ||
1695 | return 0; | |
1696 | } | |
1697 | ||
1698 | static int bus_message_open_array( | |
1699 | sd_bus_message *m, | |
1700 | struct bus_container *c, | |
1701 | const char *contents, | |
1702 | uint32_t **array_size, | |
1703 | size_t *begin, | |
1704 | bool *need_offsets) { | |
1705 | ||
1706 | unsigned nindex; | |
1707 | int alignment, r; | |
1708 | ||
1709 | assert(m); | |
1710 | assert(c); | |
1711 | assert(contents); | |
1712 | assert(array_size); | |
1713 | assert(begin); | |
1714 | assert(need_offsets); | |
1715 | ||
1716 | if (!signature_is_single(contents, true)) | |
1717 | return -EINVAL; | |
1718 | ||
1719 | if (c->signature && c->signature[c->index]) { | |
1720 | ||
1721 | /* Verify the existing signature */ | |
1722 | ||
1723 | if (c->signature[c->index] != SD_BUS_TYPE_ARRAY) | |
1724 | return -ENXIO; | |
1725 | ||
1726 | if (!startswith(c->signature + c->index + 1, contents)) | |
1727 | return -ENXIO; | |
1728 | ||
1729 | nindex = c->index + 1 + strlen(contents); | |
1730 | } else { | |
1731 | char *e; | |
1732 | ||
1733 | if (c->enclosing != 0) | |
1734 | return -ENXIO; | |
1735 | ||
1736 | /* Extend the existing signature */ | |
1737 | ||
1738 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_ARRAY), contents, NULL); | |
1739 | if (!e) { | |
1740 | m->poisoned = true; | |
1741 | return -ENOMEM; | |
1742 | } | |
1743 | ||
1744 | nindex = e - c->signature; | |
1745 | } | |
1746 | ||
1747 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
1748 | alignment = bus_gvariant_get_alignment(contents); | |
1749 | if (alignment < 0) | |
1750 | return alignment; | |
1751 | ||
1752 | /* Add alignment padding and add to offset list */ | |
e735f4d4 | 1753 | if (!message_extend_body(m, alignment, 0, false, false)) |
60f067b4 JS |
1754 | return -ENOMEM; |
1755 | ||
1756 | r = bus_gvariant_is_fixed_size(contents); | |
1757 | if (r < 0) | |
1758 | return r; | |
1759 | ||
e735f4d4 | 1760 | *begin = m->body_size; |
60f067b4 JS |
1761 | *need_offsets = r == 0; |
1762 | } else { | |
1763 | void *a, *op; | |
1764 | size_t os; | |
1765 | struct bus_body_part *o; | |
1766 | ||
1767 | alignment = bus_type_get_alignment(contents[0]); | |
1768 | if (alignment < 0) | |
1769 | return alignment; | |
1770 | ||
e735f4d4 | 1771 | a = message_extend_body(m, 4, 4, false, false); |
60f067b4 JS |
1772 | if (!a) |
1773 | return -ENOMEM; | |
1774 | ||
1775 | o = m->body_end; | |
1776 | op = m->body_end->data; | |
1777 | os = m->body_end->size; | |
1778 | ||
1779 | /* Add alignment between size and first element */ | |
e735f4d4 | 1780 | if (!message_extend_body(m, alignment, 0, false, false)) |
60f067b4 JS |
1781 | return -ENOMEM; |
1782 | ||
1783 | /* location of array size might have changed so let's readjust a */ | |
1784 | if (o == m->body_end) | |
1785 | a = adjust_pointer(a, op, os, m->body_end->data); | |
1786 | ||
1787 | *(uint32_t*) a = 0; | |
1788 | *array_size = a; | |
1789 | } | |
1790 | ||
1791 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1792 | c->index = nindex; | |
1793 | ||
1794 | return 0; | |
1795 | } | |
1796 | ||
1797 | static int bus_message_open_variant( | |
1798 | sd_bus_message *m, | |
1799 | struct bus_container *c, | |
1800 | const char *contents) { | |
1801 | ||
1802 | assert(m); | |
1803 | assert(c); | |
1804 | assert(contents); | |
1805 | ||
1806 | if (!signature_is_single(contents, false)) | |
1807 | return -EINVAL; | |
1808 | ||
1809 | if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN) | |
1810 | return -EINVAL; | |
1811 | ||
1812 | if (c->signature && c->signature[c->index]) { | |
1813 | ||
1814 | if (c->signature[c->index] != SD_BUS_TYPE_VARIANT) | |
1815 | return -ENXIO; | |
1816 | ||
1817 | } else { | |
1818 | char *e; | |
1819 | ||
1820 | if (c->enclosing != 0) | |
1821 | return -ENXIO; | |
1822 | ||
1823 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_VARIANT), NULL); | |
1824 | if (!e) { | |
1825 | m->poisoned = true; | |
1826 | return -ENOMEM; | |
1827 | } | |
1828 | } | |
1829 | ||
1830 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
1831 | /* Variants are always aligned to 8 */ | |
1832 | ||
e735f4d4 | 1833 | if (!message_extend_body(m, 8, 0, false, false)) |
60f067b4 JS |
1834 | return -ENOMEM; |
1835 | ||
1836 | } else { | |
1837 | size_t l; | |
1838 | void *a; | |
1839 | ||
1840 | l = strlen(contents); | |
e735f4d4 | 1841 | a = message_extend_body(m, 1, 1 + l + 1, false, false); |
60f067b4 JS |
1842 | if (!a) |
1843 | return -ENOMEM; | |
1844 | ||
1845 | *(uint8_t*) a = l; | |
1846 | memcpy((uint8_t*) a + 1, contents, l + 1); | |
1847 | } | |
1848 | ||
1849 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1850 | c->index++; | |
1851 | ||
1852 | return 0; | |
1853 | } | |
1854 | ||
1855 | static int bus_message_open_struct( | |
1856 | sd_bus_message *m, | |
1857 | struct bus_container *c, | |
1858 | const char *contents, | |
1859 | size_t *begin, | |
1860 | bool *need_offsets) { | |
1861 | ||
1862 | size_t nindex; | |
1863 | int r; | |
1864 | ||
1865 | assert(m); | |
1866 | assert(c); | |
1867 | assert(contents); | |
1868 | assert(begin); | |
1869 | assert(need_offsets); | |
1870 | ||
1871 | if (!signature_is_valid(contents, false)) | |
1872 | return -EINVAL; | |
1873 | ||
1874 | if (c->signature && c->signature[c->index]) { | |
1875 | size_t l; | |
1876 | ||
1877 | l = strlen(contents); | |
1878 | ||
1879 | if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN || | |
1880 | !startswith(c->signature + c->index + 1, contents) || | |
1881 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END) | |
1882 | return -ENXIO; | |
1883 | ||
1884 | nindex = c->index + 1 + l + 1; | |
1885 | } else { | |
1886 | char *e; | |
1887 | ||
1888 | if (c->enclosing != 0) | |
1889 | return -ENXIO; | |
1890 | ||
1891 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_BEGIN), contents, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_END), NULL); | |
1892 | if (!e) { | |
1893 | m->poisoned = true; | |
1894 | return -ENOMEM; | |
1895 | } | |
1896 | ||
1897 | nindex = e - c->signature; | |
1898 | } | |
1899 | ||
1900 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
1901 | int alignment; | |
1902 | ||
1903 | alignment = bus_gvariant_get_alignment(contents); | |
1904 | if (alignment < 0) | |
1905 | return alignment; | |
1906 | ||
e735f4d4 | 1907 | if (!message_extend_body(m, alignment, 0, false, false)) |
60f067b4 JS |
1908 | return -ENOMEM; |
1909 | ||
1910 | r = bus_gvariant_is_fixed_size(contents); | |
1911 | if (r < 0) | |
1912 | return r; | |
1913 | ||
e735f4d4 | 1914 | *begin = m->body_size; |
60f067b4 JS |
1915 | *need_offsets = r == 0; |
1916 | } else { | |
1917 | /* Align contents to 8 byte boundary */ | |
e735f4d4 | 1918 | if (!message_extend_body(m, 8, 0, false, false)) |
60f067b4 JS |
1919 | return -ENOMEM; |
1920 | } | |
1921 | ||
1922 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1923 | c->index = nindex; | |
1924 | ||
1925 | return 0; | |
1926 | } | |
1927 | ||
1928 | static int bus_message_open_dict_entry( | |
1929 | sd_bus_message *m, | |
1930 | struct bus_container *c, | |
1931 | const char *contents, | |
1932 | size_t *begin, | |
1933 | bool *need_offsets) { | |
1934 | ||
1935 | int r; | |
1936 | ||
1937 | assert(m); | |
1938 | assert(c); | |
1939 | assert(contents); | |
1940 | assert(begin); | |
1941 | assert(need_offsets); | |
1942 | ||
1943 | if (!signature_is_pair(contents)) | |
1944 | return -EINVAL; | |
1945 | ||
1946 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1947 | return -ENXIO; | |
1948 | ||
1949 | if (c->signature && c->signature[c->index]) { | |
1950 | size_t l; | |
1951 | ||
1952 | l = strlen(contents); | |
1953 | ||
1954 | if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN || | |
1955 | !startswith(c->signature + c->index + 1, contents) || | |
1956 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END) | |
1957 | return -ENXIO; | |
1958 | } else | |
1959 | return -ENXIO; | |
1960 | ||
1961 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
1962 | int alignment; | |
1963 | ||
1964 | alignment = bus_gvariant_get_alignment(contents); | |
1965 | if (alignment < 0) | |
1966 | return alignment; | |
1967 | ||
e735f4d4 | 1968 | if (!message_extend_body(m, alignment, 0, false, false)) |
60f067b4 JS |
1969 | return -ENOMEM; |
1970 | ||
1971 | r = bus_gvariant_is_fixed_size(contents); | |
1972 | if (r < 0) | |
1973 | return r; | |
1974 | ||
e735f4d4 | 1975 | *begin = m->body_size; |
60f067b4 JS |
1976 | *need_offsets = r == 0; |
1977 | } else { | |
1978 | /* Align contents to 8 byte boundary */ | |
e735f4d4 | 1979 | if (!message_extend_body(m, 8, 0, false, false)) |
60f067b4 JS |
1980 | return -ENOMEM; |
1981 | } | |
1982 | ||
1983 | return 0; | |
1984 | } | |
1985 | ||
1986 | _public_ int sd_bus_message_open_container( | |
1987 | sd_bus_message *m, | |
1988 | char type, | |
1989 | const char *contents) { | |
1990 | ||
1991 | struct bus_container *c, *w; | |
1992 | uint32_t *array_size = NULL; | |
1993 | char *signature; | |
1994 | size_t before, begin = 0; | |
1995 | bool need_offsets = false; | |
1996 | int r; | |
1997 | ||
1998 | assert_return(m, -EINVAL); | |
1999 | assert_return(!m->sealed, -EPERM); | |
2000 | assert_return(contents, -EINVAL); | |
2001 | assert_return(!m->poisoned, -ESTALE); | |
2002 | ||
2003 | /* Make sure we have space for one more container */ | |
2004 | if (!GREEDY_REALLOC(m->containers, m->containers_allocated, m->n_containers + 1)) { | |
2005 | m->poisoned = true; | |
2006 | return -ENOMEM; | |
2007 | } | |
2008 | ||
2009 | c = message_get_container(m); | |
2010 | ||
2011 | signature = strdup(contents); | |
2012 | if (!signature) { | |
2013 | m->poisoned = true; | |
2014 | return -ENOMEM; | |
2015 | } | |
2016 | ||
2017 | /* Save old index in the parent container, in case we have to | |
2018 | * abort this container */ | |
2019 | c->saved_index = c->index; | |
e735f4d4 | 2020 | before = m->body_size; |
60f067b4 JS |
2021 | |
2022 | if (type == SD_BUS_TYPE_ARRAY) | |
2023 | r = bus_message_open_array(m, c, contents, &array_size, &begin, &need_offsets); | |
2024 | else if (type == SD_BUS_TYPE_VARIANT) | |
2025 | r = bus_message_open_variant(m, c, contents); | |
2026 | else if (type == SD_BUS_TYPE_STRUCT) | |
2027 | r = bus_message_open_struct(m, c, contents, &begin, &need_offsets); | |
2028 | else if (type == SD_BUS_TYPE_DICT_ENTRY) | |
2029 | r = bus_message_open_dict_entry(m, c, contents, &begin, &need_offsets); | |
2030 | else | |
2031 | r = -EINVAL; | |
2032 | ||
2033 | if (r < 0) { | |
2034 | free(signature); | |
2035 | return r; | |
2036 | } | |
2037 | ||
2038 | /* OK, let's fill it in */ | |
2039 | w = m->containers + m->n_containers++; | |
2040 | w->enclosing = type; | |
2041 | w->signature = signature; | |
2042 | w->index = 0; | |
2043 | w->array_size = array_size; | |
2044 | w->before = before; | |
2045 | w->begin = begin; | |
2046 | w->n_offsets = w->offsets_allocated = 0; | |
2047 | w->offsets = NULL; | |
2048 | w->need_offsets = need_offsets; | |
2049 | ||
2050 | return 0; | |
2051 | } | |
2052 | ||
60f067b4 JS |
2053 | static int bus_message_close_array(sd_bus_message *m, struct bus_container *c) { |
2054 | ||
2055 | assert(m); | |
2056 | assert(c); | |
2057 | ||
2058 | if (!BUS_MESSAGE_IS_GVARIANT(m)) | |
2059 | return 0; | |
2060 | ||
2061 | if (c->need_offsets) { | |
2062 | size_t payload, sz, i; | |
2063 | uint8_t *a; | |
2064 | ||
2065 | /* Variable-width arrays */ | |
2066 | ||
2067 | payload = c->n_offsets > 0 ? c->offsets[c->n_offsets-1] - c->begin : 0; | |
e735f4d4 | 2068 | sz = bus_gvariant_determine_word_size(payload, c->n_offsets); |
60f067b4 | 2069 | |
e735f4d4 | 2070 | a = message_extend_body(m, 1, sz * c->n_offsets, true, false); |
60f067b4 JS |
2071 | if (!a) |
2072 | return -ENOMEM; | |
2073 | ||
2074 | for (i = 0; i < c->n_offsets; i++) | |
e735f4d4 | 2075 | bus_gvariant_write_word_le(a + sz*i, sz, c->offsets[i] - c->begin); |
60f067b4 JS |
2076 | } else { |
2077 | void *a; | |
2078 | ||
2079 | /* Fixed-width or empty arrays */ | |
2080 | ||
e735f4d4 | 2081 | a = message_extend_body(m, 1, 0, true, false); /* let's add offset to parent */ |
60f067b4 JS |
2082 | if (!a) |
2083 | return -ENOMEM; | |
2084 | } | |
2085 | ||
2086 | return 0; | |
2087 | } | |
2088 | ||
2089 | static int bus_message_close_variant(sd_bus_message *m, struct bus_container *c) { | |
2090 | uint8_t *a; | |
2091 | size_t l; | |
2092 | ||
2093 | assert(m); | |
2094 | assert(c); | |
f47781d8 | 2095 | assert(c->signature); |
60f067b4 JS |
2096 | |
2097 | if (!BUS_MESSAGE_IS_GVARIANT(m)) | |
2098 | return 0; | |
2099 | ||
2100 | l = strlen(c->signature); | |
2101 | ||
e735f4d4 | 2102 | a = message_extend_body(m, 1, 1 + l, true, false); |
60f067b4 JS |
2103 | if (!a) |
2104 | return -ENOMEM; | |
2105 | ||
2106 | a[0] = 0; | |
2107 | memcpy(a+1, c->signature, l); | |
2108 | ||
2109 | return 0; | |
2110 | } | |
2111 | ||
2112 | static int bus_message_close_struct(sd_bus_message *m, struct bus_container *c, bool add_offset) { | |
7035cd9e | 2113 | bool fixed_size = true; |
60f067b4 JS |
2114 | size_t n_variable = 0; |
2115 | unsigned i = 0; | |
2116 | const char *p; | |
2117 | uint8_t *a; | |
2118 | int r; | |
2119 | ||
2120 | assert(m); | |
2121 | assert(c); | |
2122 | ||
2123 | if (!BUS_MESSAGE_IS_GVARIANT(m)) | |
2124 | return 0; | |
2125 | ||
2126 | p = strempty(c->signature); | |
2127 | while (*p != 0) { | |
2128 | size_t n; | |
2129 | ||
2130 | r = signature_element_length(p, &n); | |
2131 | if (r < 0) | |
2132 | return r; | |
2133 | else { | |
2134 | char t[n+1]; | |
2135 | ||
2136 | memcpy(t, p, n); | |
2137 | t[n] = 0; | |
2138 | ||
2139 | r = bus_gvariant_is_fixed_size(t); | |
2140 | if (r < 0) | |
2141 | return r; | |
2142 | } | |
2143 | ||
2144 | assert(!c->need_offsets || i <= c->n_offsets); | |
2145 | ||
2146 | /* We need to add an offset for each item that has a | |
2147 | * variable size and that is not the last one in the | |
2148 | * list */ | |
7035cd9e MP |
2149 | if (r == 0) |
2150 | fixed_size = false; | |
60f067b4 JS |
2151 | if (r == 0 && p[n] != 0) |
2152 | n_variable++; | |
2153 | ||
2154 | i++; | |
2155 | p += n; | |
2156 | } | |
2157 | ||
2158 | assert(!c->need_offsets || i == c->n_offsets); | |
2159 | assert(c->need_offsets || n_variable == 0); | |
2160 | ||
5fd56512 MP |
2161 | if (isempty(c->signature)) { |
2162 | /* The unary type is encoded as fixed 1 byte padding */ | |
2163 | a = message_extend_body(m, 1, 1, add_offset, false); | |
2164 | if (!a) | |
2165 | return -ENOMEM; | |
2166 | ||
2167 | *a = 0; | |
2168 | } else if (n_variable <= 0) { | |
7035cd9e MP |
2169 | int alignment = 1; |
2170 | ||
2171 | /* Structures with fixed-size members only have to be | |
2172 | * fixed-size themselves. But gvariant requires all fixed-size | |
2173 | * elements to be sized a multiple of their alignment. Hence, | |
2174 | * we must *always* add final padding after the last member so | |
2175 | * the overall size of the structure is properly aligned. */ | |
2176 | if (fixed_size) | |
2177 | alignment = bus_gvariant_get_alignment(strempty(c->signature)); | |
2178 | ||
2179 | assert(alignment > 0); | |
2180 | ||
2181 | a = message_extend_body(m, alignment, 0, add_offset, false); | |
60f067b4 JS |
2182 | if (!a) |
2183 | return -ENOMEM; | |
2184 | } else { | |
2185 | size_t sz; | |
2186 | unsigned j; | |
2187 | ||
e735f4d4 | 2188 | assert(c->offsets[c->n_offsets-1] == m->body_size); |
60f067b4 | 2189 | |
e735f4d4 | 2190 | sz = bus_gvariant_determine_word_size(m->body_size - c->begin, n_variable); |
60f067b4 | 2191 | |
e735f4d4 | 2192 | a = message_extend_body(m, 1, sz * n_variable, add_offset, false); |
60f067b4 JS |
2193 | if (!a) |
2194 | return -ENOMEM; | |
2195 | ||
2196 | p = strempty(c->signature); | |
2197 | for (i = 0, j = 0; i < c->n_offsets; i++) { | |
2198 | unsigned k; | |
2199 | size_t n; | |
2200 | ||
2201 | r = signature_element_length(p, &n); | |
2202 | if (r < 0) | |
2203 | return r; | |
2204 | else { | |
2205 | char t[n+1]; | |
2206 | ||
2207 | memcpy(t, p, n); | |
2208 | t[n] = 0; | |
2209 | ||
2210 | p += n; | |
2211 | ||
2212 | r = bus_gvariant_is_fixed_size(t); | |
2213 | if (r < 0) | |
2214 | return r; | |
2215 | if (r > 0 || p[0] == 0) | |
2216 | continue; | |
2217 | } | |
2218 | ||
2219 | k = n_variable - 1 - j; | |
2220 | ||
e735f4d4 | 2221 | bus_gvariant_write_word_le(a + k * sz, sz, c->offsets[i] - c->begin); |
60f067b4 JS |
2222 | |
2223 | j++; | |
2224 | } | |
2225 | } | |
2226 | ||
2227 | return 0; | |
2228 | } | |
2229 | ||
2230 | _public_ int sd_bus_message_close_container(sd_bus_message *m) { | |
2231 | struct bus_container *c; | |
2232 | int r; | |
2233 | ||
2234 | assert_return(m, -EINVAL); | |
2235 | assert_return(!m->sealed, -EPERM); | |
2236 | assert_return(m->n_containers > 0, -EINVAL); | |
2237 | assert_return(!m->poisoned, -ESTALE); | |
2238 | ||
2239 | c = message_get_container(m); | |
2240 | ||
2241 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2242 | if (c->signature && c->signature[c->index] != 0) | |
2243 | return -EINVAL; | |
2244 | ||
2245 | m->n_containers--; | |
2246 | ||
2247 | if (c->enclosing == SD_BUS_TYPE_ARRAY) | |
2248 | r = bus_message_close_array(m, c); | |
2249 | else if (c->enclosing == SD_BUS_TYPE_VARIANT) | |
2250 | r = bus_message_close_variant(m, c); | |
f5e65279 | 2251 | else if (IN_SET(c->enclosing, SD_BUS_TYPE_STRUCT, SD_BUS_TYPE_DICT_ENTRY)) |
60f067b4 JS |
2252 | r = bus_message_close_struct(m, c, true); |
2253 | else | |
2254 | assert_not_reached("Unknown container type"); | |
2255 | ||
2256 | free(c->signature); | |
2257 | free(c->offsets); | |
2258 | ||
2259 | return r; | |
2260 | } | |
2261 | ||
2262 | typedef struct { | |
2263 | const char *types; | |
2264 | unsigned n_struct; | |
2265 | unsigned n_array; | |
2266 | } TypeStack; | |
2267 | ||
2268 | static int type_stack_push(TypeStack *stack, unsigned max, unsigned *i, const char *types, unsigned n_struct, unsigned n_array) { | |
2269 | assert(stack); | |
2270 | assert(max > 0); | |
2271 | ||
2272 | if (*i >= max) | |
2273 | return -EINVAL; | |
2274 | ||
2275 | stack[*i].types = types; | |
2276 | stack[*i].n_struct = n_struct; | |
2277 | stack[*i].n_array = n_array; | |
2278 | (*i)++; | |
2279 | ||
2280 | return 0; | |
2281 | } | |
2282 | ||
2283 | static int type_stack_pop(TypeStack *stack, unsigned max, unsigned *i, const char **types, unsigned *n_struct, unsigned *n_array) { | |
2284 | assert(stack); | |
2285 | assert(max > 0); | |
2286 | assert(types); | |
2287 | assert(n_struct); | |
2288 | assert(n_array); | |
2289 | ||
2290 | if (*i <= 0) | |
2291 | return 0; | |
2292 | ||
2293 | (*i)--; | |
2294 | *types = stack[*i].types; | |
2295 | *n_struct = stack[*i].n_struct; | |
2296 | *n_array = stack[*i].n_array; | |
2297 | ||
2298 | return 1; | |
2299 | } | |
2300 | ||
81c58355 | 2301 | _public_ int sd_bus_message_appendv( |
60f067b4 JS |
2302 | sd_bus_message *m, |
2303 | const char *types, | |
2304 | va_list ap) { | |
2305 | ||
2306 | unsigned n_array, n_struct; | |
2307 | TypeStack stack[BUS_CONTAINER_DEPTH]; | |
2308 | unsigned stack_ptr = 0; | |
2309 | int r; | |
2310 | ||
81c58355 MB |
2311 | assert_return(m, -EINVAL); |
2312 | assert_return(types, -EINVAL); | |
2313 | assert_return(!m->sealed, -EPERM); | |
2314 | assert_return(!m->poisoned, -ESTALE); | |
60f067b4 JS |
2315 | |
2316 | n_array = (unsigned) -1; | |
2317 | n_struct = strlen(types); | |
2318 | ||
2319 | for (;;) { | |
2320 | const char *t; | |
2321 | ||
2322 | if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) { | |
2323 | r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array); | |
2324 | if (r < 0) | |
2325 | return r; | |
2326 | if (r == 0) | |
2327 | break; | |
2328 | ||
2329 | r = sd_bus_message_close_container(m); | |
2330 | if (r < 0) | |
2331 | return r; | |
2332 | ||
2333 | continue; | |
2334 | } | |
2335 | ||
2336 | t = types; | |
2337 | if (n_array != (unsigned) -1) | |
aa27b158 | 2338 | n_array--; |
60f067b4 | 2339 | else { |
aa27b158 | 2340 | types++; |
60f067b4 JS |
2341 | n_struct--; |
2342 | } | |
2343 | ||
2344 | switch (*t) { | |
2345 | ||
2346 | case SD_BUS_TYPE_BYTE: { | |
2347 | uint8_t x; | |
2348 | ||
2349 | x = (uint8_t) va_arg(ap, int); | |
2350 | r = sd_bus_message_append_basic(m, *t, &x); | |
2351 | break; | |
2352 | } | |
2353 | ||
2354 | case SD_BUS_TYPE_BOOLEAN: | |
2355 | case SD_BUS_TYPE_INT32: | |
2356 | case SD_BUS_TYPE_UINT32: | |
2357 | case SD_BUS_TYPE_UNIX_FD: { | |
2358 | uint32_t x; | |
2359 | ||
2360 | /* We assume a boolean is the same as int32_t */ | |
2361 | assert_cc(sizeof(int32_t) == sizeof(int)); | |
2362 | ||
2363 | x = va_arg(ap, uint32_t); | |
2364 | r = sd_bus_message_append_basic(m, *t, &x); | |
2365 | break; | |
2366 | } | |
2367 | ||
2368 | case SD_BUS_TYPE_INT16: | |
2369 | case SD_BUS_TYPE_UINT16: { | |
2370 | uint16_t x; | |
2371 | ||
2372 | x = (uint16_t) va_arg(ap, int); | |
2373 | r = sd_bus_message_append_basic(m, *t, &x); | |
2374 | break; | |
2375 | } | |
2376 | ||
2377 | case SD_BUS_TYPE_INT64: | |
e735f4d4 | 2378 | case SD_BUS_TYPE_UINT64: { |
60f067b4 JS |
2379 | uint64_t x; |
2380 | ||
2381 | x = va_arg(ap, uint64_t); | |
2382 | r = sd_bus_message_append_basic(m, *t, &x); | |
2383 | break; | |
2384 | } | |
2385 | ||
e735f4d4 MP |
2386 | case SD_BUS_TYPE_DOUBLE: { |
2387 | double x; | |
2388 | ||
2389 | x = va_arg(ap, double); | |
2390 | r = sd_bus_message_append_basic(m, *t, &x); | |
2391 | break; | |
2392 | } | |
2393 | ||
60f067b4 JS |
2394 | case SD_BUS_TYPE_STRING: |
2395 | case SD_BUS_TYPE_OBJECT_PATH: | |
2396 | case SD_BUS_TYPE_SIGNATURE: { | |
2397 | const char *x; | |
2398 | ||
2399 | x = va_arg(ap, const char*); | |
2400 | r = sd_bus_message_append_basic(m, *t, x); | |
2401 | break; | |
2402 | } | |
2403 | ||
2404 | case SD_BUS_TYPE_ARRAY: { | |
2405 | size_t k; | |
2406 | ||
2407 | r = signature_element_length(t + 1, &k); | |
2408 | if (r < 0) | |
2409 | return r; | |
2410 | ||
2411 | { | |
2412 | char s[k + 1]; | |
2413 | memcpy(s, t + 1, k); | |
2414 | s[k] = 0; | |
2415 | ||
2416 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, s); | |
2417 | if (r < 0) | |
2418 | return r; | |
2419 | } | |
2420 | ||
2421 | if (n_array == (unsigned) -1) { | |
2422 | types += k; | |
2423 | n_struct -= k; | |
2424 | } | |
2425 | ||
2426 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); | |
2427 | if (r < 0) | |
2428 | return r; | |
2429 | ||
2430 | types = t + 1; | |
2431 | n_struct = k; | |
2432 | n_array = va_arg(ap, unsigned); | |
2433 | ||
2434 | break; | |
2435 | } | |
2436 | ||
2437 | case SD_BUS_TYPE_VARIANT: { | |
2438 | const char *s; | |
2439 | ||
2440 | s = va_arg(ap, const char*); | |
2441 | if (!s) | |
2442 | return -EINVAL; | |
2443 | ||
2444 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_VARIANT, s); | |
2445 | if (r < 0) | |
2446 | return r; | |
2447 | ||
2448 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); | |
2449 | if (r < 0) | |
2450 | return r; | |
2451 | ||
2452 | types = s; | |
2453 | n_struct = strlen(s); | |
2454 | n_array = (unsigned) -1; | |
2455 | ||
2456 | break; | |
2457 | } | |
2458 | ||
2459 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
2460 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
2461 | size_t k; | |
2462 | ||
2463 | r = signature_element_length(t, &k); | |
2464 | if (r < 0) | |
2465 | return r; | |
2466 | ||
2467 | { | |
2468 | char s[k - 1]; | |
2469 | ||
2470 | memcpy(s, t + 1, k - 2); | |
2471 | s[k - 2] = 0; | |
2472 | ||
2473 | r = sd_bus_message_open_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
2474 | if (r < 0) | |
2475 | return r; | |
2476 | } | |
2477 | ||
2478 | if (n_array == (unsigned) -1) { | |
2479 | types += k - 1; | |
2480 | n_struct -= k - 1; | |
2481 | } | |
2482 | ||
2483 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); | |
2484 | if (r < 0) | |
2485 | return r; | |
2486 | ||
2487 | types = t + 1; | |
2488 | n_struct = k - 2; | |
2489 | n_array = (unsigned) -1; | |
2490 | ||
2491 | break; | |
2492 | } | |
2493 | ||
2494 | default: | |
2495 | r = -EINVAL; | |
2496 | } | |
2497 | ||
2498 | if (r < 0) | |
2499 | return r; | |
2500 | } | |
2501 | ||
2502 | return 1; | |
2503 | } | |
2504 | ||
2505 | _public_ int sd_bus_message_append(sd_bus_message *m, const char *types, ...) { | |
2506 | va_list ap; | |
2507 | int r; | |
2508 | ||
2509 | assert_return(m, -EINVAL); | |
2510 | assert_return(types, -EINVAL); | |
2511 | assert_return(!m->sealed, -EPERM); | |
2512 | assert_return(!m->poisoned, -ESTALE); | |
2513 | ||
2514 | va_start(ap, types); | |
81c58355 | 2515 | r = sd_bus_message_appendv(m, types, ap); |
60f067b4 JS |
2516 | va_end(ap); |
2517 | ||
2518 | return r; | |
2519 | } | |
2520 | ||
2521 | _public_ int sd_bus_message_append_array_space( | |
2522 | sd_bus_message *m, | |
2523 | char type, | |
2524 | size_t size, | |
2525 | void **ptr) { | |
2526 | ||
2527 | ssize_t align, sz; | |
2528 | void *a; | |
2529 | int r; | |
2530 | ||
2531 | assert_return(m, -EINVAL); | |
2532 | assert_return(!m->sealed, -EPERM); | |
2533 | assert_return(bus_type_is_trivial(type) && type != SD_BUS_TYPE_BOOLEAN, -EINVAL); | |
2534 | assert_return(ptr || size == 0, -EINVAL); | |
2535 | assert_return(!m->poisoned, -ESTALE); | |
2536 | ||
2537 | /* alignment and size of the trivial types (except bool) is | |
2538 | * identical for gvariant and dbus1 marshalling */ | |
2539 | align = bus_type_get_alignment(type); | |
2540 | sz = bus_type_get_size(type); | |
2541 | ||
2542 | assert_se(align > 0); | |
2543 | assert_se(sz > 0); | |
2544 | ||
2545 | if (size % sz != 0) | |
2546 | return -EINVAL; | |
2547 | ||
2548 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
2549 | if (r < 0) | |
2550 | return r; | |
2551 | ||
e735f4d4 | 2552 | a = message_extend_body(m, align, size, false, false); |
60f067b4 JS |
2553 | if (!a) |
2554 | return -ENOMEM; | |
2555 | ||
2556 | r = sd_bus_message_close_container(m); | |
2557 | if (r < 0) | |
2558 | return r; | |
2559 | ||
2560 | *ptr = a; | |
2561 | return 0; | |
2562 | } | |
2563 | ||
f47781d8 MP |
2564 | _public_ int sd_bus_message_append_array( |
2565 | sd_bus_message *m, | |
2566 | char type, | |
2567 | const void *ptr, | |
2568 | size_t size) { | |
60f067b4 JS |
2569 | int r; |
2570 | void *p; | |
2571 | ||
2572 | assert_return(m, -EINVAL); | |
2573 | assert_return(!m->sealed, -EPERM); | |
2574 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
2575 | assert_return(ptr || size == 0, -EINVAL); | |
2576 | assert_return(!m->poisoned, -ESTALE); | |
2577 | ||
2578 | r = sd_bus_message_append_array_space(m, type, size, &p); | |
2579 | if (r < 0) | |
2580 | return r; | |
2581 | ||
aa27b158 | 2582 | memcpy_safe(p, ptr, size); |
60f067b4 JS |
2583 | |
2584 | return 0; | |
2585 | } | |
2586 | ||
2587 | _public_ int sd_bus_message_append_array_iovec( | |
2588 | sd_bus_message *m, | |
2589 | char type, | |
2590 | const struct iovec *iov, | |
2591 | unsigned n) { | |
2592 | ||
2593 | size_t size; | |
2594 | unsigned i; | |
2595 | void *p; | |
2596 | int r; | |
2597 | ||
2598 | assert_return(m, -EINVAL); | |
2599 | assert_return(!m->sealed, -EPERM); | |
2600 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
2601 | assert_return(iov || n == 0, -EINVAL); | |
2602 | assert_return(!m->poisoned, -ESTALE); | |
2603 | ||
2604 | size = IOVEC_TOTAL_SIZE(iov, n); | |
2605 | ||
2606 | r = sd_bus_message_append_array_space(m, type, size, &p); | |
2607 | if (r < 0) | |
2608 | return r; | |
2609 | ||
2610 | for (i = 0; i < n; i++) { | |
2611 | ||
2612 | if (iov[i].iov_base) | |
2613 | memcpy(p, iov[i].iov_base, iov[i].iov_len); | |
2614 | else | |
2615 | memzero(p, iov[i].iov_len); | |
2616 | ||
2617 | p = (uint8_t*) p + iov[i].iov_len; | |
2618 | } | |
2619 | ||
2620 | return 0; | |
2621 | } | |
2622 | ||
f47781d8 MP |
2623 | _public_ int sd_bus_message_append_array_memfd( |
2624 | sd_bus_message *m, | |
2625 | char type, | |
2626 | int memfd, | |
2627 | uint64_t offset, | |
2628 | uint64_t size) { | |
2629 | ||
60f067b4 JS |
2630 | _cleanup_close_ int copy_fd = -1; |
2631 | struct bus_body_part *part; | |
2632 | ssize_t align, sz; | |
f47781d8 | 2633 | uint64_t real_size; |
60f067b4 JS |
2634 | void *a; |
2635 | int r; | |
2636 | ||
f47781d8 | 2637 | assert_return(m, -EINVAL); |
13d276d0 | 2638 | assert_return(memfd >= 0, -EBADF); |
f47781d8 MP |
2639 | assert_return(bus_type_is_trivial(type), -EINVAL); |
2640 | assert_return(size > 0, -EINVAL); | |
2641 | assert_return(!m->sealed, -EPERM); | |
2642 | assert_return(!m->poisoned, -ESTALE); | |
60f067b4 | 2643 | |
5eef597e | 2644 | r = memfd_set_sealed(memfd); |
60f067b4 JS |
2645 | if (r < 0) |
2646 | return r; | |
2647 | ||
5eef597e | 2648 | copy_fd = dup(memfd); |
60f067b4 JS |
2649 | if (copy_fd < 0) |
2650 | return copy_fd; | |
2651 | ||
f47781d8 | 2652 | r = memfd_get_size(memfd, &real_size); |
60f067b4 JS |
2653 | if (r < 0) |
2654 | return r; | |
2655 | ||
f47781d8 MP |
2656 | if (offset == 0 && size == (uint64_t) -1) |
2657 | size = real_size; | |
2658 | else if (offset + size > real_size) | |
2659 | return -EMSGSIZE; | |
2660 | ||
60f067b4 JS |
2661 | align = bus_type_get_alignment(type); |
2662 | sz = bus_type_get_size(type); | |
2663 | ||
2664 | assert_se(align > 0); | |
2665 | assert_se(sz > 0); | |
2666 | ||
f47781d8 MP |
2667 | if (offset % align != 0) |
2668 | return -EINVAL; | |
2669 | ||
60f067b4 JS |
2670 | if (size % sz != 0) |
2671 | return -EINVAL; | |
2672 | ||
2673 | if (size > (uint64_t) (uint32_t) -1) | |
2674 | return -EINVAL; | |
2675 | ||
2676 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
2677 | if (r < 0) | |
2678 | return r; | |
2679 | ||
e735f4d4 | 2680 | a = message_extend_body(m, align, 0, false, false); |
60f067b4 JS |
2681 | if (!a) |
2682 | return -ENOMEM; | |
2683 | ||
2684 | part = message_append_part(m); | |
2685 | if (!part) | |
2686 | return -ENOMEM; | |
2687 | ||
2688 | part->memfd = copy_fd; | |
f47781d8 | 2689 | part->memfd_offset = offset; |
60f067b4 JS |
2690 | part->sealed = true; |
2691 | part->size = size; | |
2692 | copy_fd = -1; | |
2693 | ||
e735f4d4 | 2694 | m->body_size += size; |
60f067b4 JS |
2695 | message_extend_containers(m, size); |
2696 | ||
2697 | return sd_bus_message_close_container(m); | |
2698 | } | |
2699 | ||
f47781d8 MP |
2700 | _public_ int sd_bus_message_append_string_memfd( |
2701 | sd_bus_message *m, | |
2702 | int memfd, | |
2703 | uint64_t offset, | |
2704 | uint64_t size) { | |
2705 | ||
60f067b4 JS |
2706 | _cleanup_close_ int copy_fd = -1; |
2707 | struct bus_body_part *part; | |
2708 | struct bus_container *c; | |
f47781d8 | 2709 | uint64_t real_size; |
60f067b4 JS |
2710 | void *a; |
2711 | int r; | |
2712 | ||
2713 | assert_return(m, -EINVAL); | |
13d276d0 | 2714 | assert_return(memfd >= 0, -EBADF); |
f47781d8 | 2715 | assert_return(size > 0, -EINVAL); |
60f067b4 JS |
2716 | assert_return(!m->sealed, -EPERM); |
2717 | assert_return(!m->poisoned, -ESTALE); | |
2718 | ||
5eef597e | 2719 | r = memfd_set_sealed(memfd); |
60f067b4 JS |
2720 | if (r < 0) |
2721 | return r; | |
2722 | ||
5eef597e | 2723 | copy_fd = dup(memfd); |
60f067b4 JS |
2724 | if (copy_fd < 0) |
2725 | return copy_fd; | |
2726 | ||
f47781d8 | 2727 | r = memfd_get_size(memfd, &real_size); |
60f067b4 JS |
2728 | if (r < 0) |
2729 | return r; | |
2730 | ||
f47781d8 MP |
2731 | if (offset == 0 && size == (uint64_t) -1) |
2732 | size = real_size; | |
2733 | else if (offset + size > real_size) | |
2734 | return -EMSGSIZE; | |
2735 | ||
60f067b4 JS |
2736 | /* We require this to be NUL terminated */ |
2737 | if (size == 0) | |
2738 | return -EINVAL; | |
2739 | ||
2740 | if (size > (uint64_t) (uint32_t) -1) | |
2741 | return -EINVAL; | |
2742 | ||
2743 | c = message_get_container(m); | |
2744 | if (c->signature && c->signature[c->index]) { | |
2745 | /* Container signature is already set */ | |
2746 | ||
2747 | if (c->signature[c->index] != SD_BUS_TYPE_STRING) | |
2748 | return -ENXIO; | |
2749 | } else { | |
2750 | char *e; | |
2751 | ||
e735f4d4 | 2752 | /* Maybe we can append to the signature? But only if this is the top-level container */ |
60f067b4 JS |
2753 | if (c->enclosing != 0) |
2754 | return -ENXIO; | |
2755 | ||
2756 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL); | |
2757 | if (!e) { | |
2758 | m->poisoned = true; | |
2759 | return -ENOMEM; | |
2760 | } | |
2761 | } | |
2762 | ||
2763 | if (!BUS_MESSAGE_IS_GVARIANT(m)) { | |
e735f4d4 | 2764 | a = message_extend_body(m, 4, 4, false, false); |
60f067b4 JS |
2765 | if (!a) |
2766 | return -ENOMEM; | |
2767 | ||
2768 | *(uint32_t*) a = size - 1; | |
2769 | } | |
2770 | ||
2771 | part = message_append_part(m); | |
2772 | if (!part) | |
2773 | return -ENOMEM; | |
2774 | ||
2775 | part->memfd = copy_fd; | |
f47781d8 | 2776 | part->memfd_offset = offset; |
60f067b4 JS |
2777 | part->sealed = true; |
2778 | part->size = size; | |
2779 | copy_fd = -1; | |
2780 | ||
e735f4d4 | 2781 | m->body_size += size; |
60f067b4 JS |
2782 | message_extend_containers(m, size); |
2783 | ||
2784 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
e735f4d4 | 2785 | r = message_add_offset(m, m->body_size); |
60f067b4 JS |
2786 | if (r < 0) { |
2787 | m->poisoned = true; | |
2788 | return -ENOMEM; | |
2789 | } | |
2790 | } | |
2791 | ||
2792 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2793 | c->index++; | |
2794 | ||
2795 | return 0; | |
2796 | } | |
2797 | ||
2798 | _public_ int sd_bus_message_append_strv(sd_bus_message *m, char **l) { | |
2799 | char **i; | |
2800 | int r; | |
2801 | ||
2802 | assert_return(m, -EINVAL); | |
2803 | assert_return(!m->sealed, -EPERM); | |
2804 | assert_return(!m->poisoned, -ESTALE); | |
2805 | ||
2806 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2807 | if (r < 0) | |
2808 | return r; | |
2809 | ||
2810 | STRV_FOREACH(i, l) { | |
2811 | r = sd_bus_message_append_basic(m, 's', *i); | |
2812 | if (r < 0) | |
2813 | return r; | |
2814 | } | |
2815 | ||
2816 | return sd_bus_message_close_container(m); | |
2817 | } | |
2818 | ||
2819 | static int bus_message_close_header(sd_bus_message *m) { | |
60f067b4 JS |
2820 | |
2821 | assert(m); | |
2822 | ||
e735f4d4 MP |
2823 | /* The actual user data is finished now, we just complete the |
2824 | variant and struct now (at least on gvariant). Remember | |
5a920b42 | 2825 | this position, so that during parsing we know where to |
e735f4d4 MP |
2826 | put the outer container end. */ |
2827 | m->user_body_size = m->body_size; | |
60f067b4 | 2828 | |
e735f4d4 MP |
2829 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2830 | const char *signature; | |
2831 | size_t sz, l; | |
2832 | void *d; | |
60f067b4 | 2833 | |
e735f4d4 MP |
2834 | /* Add offset table to end of fields array */ |
2835 | if (m->n_header_offsets >= 1) { | |
2836 | uint8_t *a; | |
2837 | unsigned i; | |
60f067b4 | 2838 | |
e735f4d4 | 2839 | assert(m->fields_size == m->header_offsets[m->n_header_offsets-1]); |
60f067b4 | 2840 | |
e735f4d4 MP |
2841 | sz = bus_gvariant_determine_word_size(m->fields_size, m->n_header_offsets); |
2842 | a = message_extend_fields(m, 1, sz * m->n_header_offsets, false); | |
2843 | if (!a) | |
2844 | return -ENOMEM; | |
2845 | ||
2846 | for (i = 0; i < m->n_header_offsets; i++) | |
2847 | bus_gvariant_write_word_le(a + sz*i, sz, m->header_offsets[i]); | |
2848 | } | |
2849 | ||
2850 | /* Add gvariant NUL byte plus signature to the end of | |
2851 | * the body, followed by the final offset pointing to | |
2852 | * the end of the fields array */ | |
2853 | ||
2854 | signature = strempty(m->root_container.signature); | |
2855 | l = strlen(signature); | |
2856 | ||
5fd56512 MP |
2857 | sz = bus_gvariant_determine_word_size(sizeof(struct bus_header) + ALIGN8(m->fields_size) + m->body_size + 1 + l + 2, 1); |
2858 | d = message_extend_body(m, 1, 1 + l + 2 + sz, false, true); | |
e735f4d4 MP |
2859 | if (!d) |
2860 | return -ENOMEM; | |
2861 | ||
2862 | *(uint8_t*) d = 0; | |
5fd56512 MP |
2863 | *((uint8_t*) d + 1) = SD_BUS_TYPE_STRUCT_BEGIN; |
2864 | memcpy((uint8_t*) d + 2, signature, l); | |
2865 | *((uint8_t*) d + 1 + l + 1) = SD_BUS_TYPE_STRUCT_END; | |
60f067b4 | 2866 | |
5fd56512 | 2867 | bus_gvariant_write_word_le((uint8_t*) d + 1 + l + 2, sz, sizeof(struct bus_header) + m->fields_size); |
e735f4d4 MP |
2868 | |
2869 | m->footer = d; | |
5fd56512 | 2870 | m->footer_accessible = 1 + l + 2 + sz; |
e735f4d4 MP |
2871 | } else { |
2872 | m->header->dbus1.fields_size = m->fields_size; | |
2873 | m->header->dbus1.body_size = m->body_size; | |
2874 | } | |
60f067b4 JS |
2875 | |
2876 | return 0; | |
2877 | } | |
2878 | ||
52ad194e | 2879 | _public_ int sd_bus_message_seal(sd_bus_message *m, uint64_t cookie, uint64_t timeout_usec) { |
60f067b4 | 2880 | struct bus_body_part *part; |
e735f4d4 | 2881 | size_t a; |
60f067b4 JS |
2882 | unsigned i; |
2883 | int r; | |
2884 | ||
52ad194e | 2885 | assert_return(m, -EINVAL); |
60f067b4 JS |
2886 | |
2887 | if (m->sealed) | |
2888 | return -EPERM; | |
2889 | ||
2890 | if (m->n_containers > 0) | |
2891 | return -EBADMSG; | |
2892 | ||
2893 | if (m->poisoned) | |
2894 | return -ESTALE; | |
2895 | ||
e735f4d4 MP |
2896 | if (cookie > 0xffffffffULL && |
2897 | !BUS_MESSAGE_IS_GVARIANT(m)) | |
e3bff60a | 2898 | return -EOPNOTSUPP; |
e735f4d4 | 2899 | |
60f067b4 JS |
2900 | /* In vtables the return signature of method calls is listed, |
2901 | * let's check if they match if this is a response */ | |
2902 | if (m->header->type == SD_BUS_MESSAGE_METHOD_RETURN && | |
2903 | m->enforced_reply_signature && | |
2904 | !streq(strempty(m->root_container.signature), m->enforced_reply_signature)) | |
2905 | return -ENOMSG; | |
2906 | ||
2907 | /* If gvariant marshalling is used we need to close the body structure */ | |
2908 | r = bus_message_close_struct(m, &m->root_container, false); | |
2909 | if (r < 0) | |
2910 | return r; | |
2911 | ||
e735f4d4 MP |
2912 | /* If there's a non-trivial signature set, then add it in |
2913 | * here, but only on dbus1 */ | |
2914 | if (!isempty(m->root_container.signature) && !BUS_MESSAGE_IS_GVARIANT(m)) { | |
60f067b4 JS |
2915 | r = message_append_field_signature(m, BUS_MESSAGE_HEADER_SIGNATURE, m->root_container.signature, NULL); |
2916 | if (r < 0) | |
2917 | return r; | |
2918 | } | |
2919 | ||
2920 | if (m->n_fds > 0) { | |
2921 | r = message_append_field_uint32(m, BUS_MESSAGE_HEADER_UNIX_FDS, m->n_fds); | |
2922 | if (r < 0) | |
2923 | return r; | |
2924 | } | |
2925 | ||
2926 | r = bus_message_close_header(m); | |
2927 | if (r < 0) | |
2928 | return r; | |
2929 | ||
e735f4d4 MP |
2930 | if (BUS_MESSAGE_IS_GVARIANT(m)) |
2931 | m->header->dbus2.cookie = cookie; | |
2932 | else | |
2933 | m->header->dbus1.serial = (uint32_t) cookie; | |
2934 | ||
52ad194e | 2935 | m->timeout = m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED ? 0 : timeout_usec; |
60f067b4 JS |
2936 | |
2937 | /* Add padding at the end of the fields part, since we know | |
2938 | * the body needs to start at an 8 byte alignment. We made | |
2939 | * sure we allocated enough space for this, so all we need to | |
2940 | * do here is to zero it out. */ | |
e735f4d4 | 2941 | a = ALIGN8(m->fields_size) - m->fields_size; |
60f067b4 | 2942 | if (a > 0) |
e735f4d4 | 2943 | memzero((uint8_t*) BUS_MESSAGE_FIELDS(m) + m->fields_size, a); |
60f067b4 JS |
2944 | |
2945 | /* If this is something we can send as memfd, then let's seal | |
2946 | the memfd now. Note that we can send memfds as payload only | |
2947 | for directed messages, and not for broadcasts. */ | |
2948 | if (m->destination && m->bus->use_memfd) { | |
2949 | MESSAGE_FOREACH_PART(part, i, m) | |
e735f4d4 MP |
2950 | if (part->memfd >= 0 && |
2951 | !part->sealed && | |
2952 | (part->size > MEMFD_MIN_SIZE || m->bus->use_memfd < 0) && | |
2953 | part != m->body_end) { /* The last part may never be sent as memfd */ | |
60f067b4 JS |
2954 | uint64_t sz; |
2955 | ||
2956 | /* Try to seal it if that makes | |
2957 | * sense. First, unmap our own map to | |
2958 | * make sure we don't keep it busy. */ | |
2959 | bus_body_part_unmap(part); | |
2960 | ||
2961 | /* Then, sync up real memfd size */ | |
2962 | sz = part->size; | |
f47781d8 MP |
2963 | r = memfd_set_size(part->memfd, sz); |
2964 | if (r < 0) | |
2965 | return r; | |
60f067b4 JS |
2966 | |
2967 | /* Finally, try to seal */ | |
f47781d8 | 2968 | if (memfd_set_sealed(part->memfd) >= 0) |
60f067b4 JS |
2969 | part->sealed = true; |
2970 | } | |
2971 | } | |
2972 | ||
e735f4d4 | 2973 | m->root_container.end = m->user_body_size; |
60f067b4 JS |
2974 | m->root_container.index = 0; |
2975 | m->root_container.offset_index = 0; | |
2976 | m->root_container.item_size = m->root_container.n_offsets > 0 ? m->root_container.offsets[0] : 0; | |
2977 | ||
2978 | m->sealed = true; | |
2979 | ||
2980 | return 0; | |
2981 | } | |
2982 | ||
2983 | int bus_body_part_map(struct bus_body_part *part) { | |
2984 | void *p; | |
f47781d8 | 2985 | size_t psz, shift; |
60f067b4 JS |
2986 | |
2987 | assert_se(part); | |
2988 | ||
2989 | if (part->data) | |
2990 | return 0; | |
2991 | ||
2992 | if (part->size <= 0) | |
2993 | return 0; | |
2994 | ||
2995 | /* For smaller zero parts (as used for padding) we don't need to map anything... */ | |
2996 | if (part->memfd < 0 && part->is_zero && part->size < 8) { | |
2997 | static const uint8_t zeroes[7] = { }; | |
2998 | part->data = (void*) zeroes; | |
2999 | return 0; | |
3000 | } | |
3001 | ||
f47781d8 MP |
3002 | shift = part->memfd_offset - ((part->memfd_offset / page_size()) * page_size()); |
3003 | psz = PAGE_ALIGN(part->size + shift); | |
60f067b4 JS |
3004 | |
3005 | if (part->memfd >= 0) | |
f47781d8 | 3006 | p = mmap(NULL, psz, PROT_READ, MAP_PRIVATE, part->memfd, part->memfd_offset - shift); |
60f067b4 JS |
3007 | else if (part->is_zero) |
3008 | p = mmap(NULL, psz, PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
3009 | else | |
3010 | return -EINVAL; | |
3011 | ||
3012 | if (p == MAP_FAILED) | |
3013 | return -errno; | |
3014 | ||
3015 | part->mapped = psz; | |
f47781d8 MP |
3016 | part->mmap_begin = p; |
3017 | part->data = (uint8_t*) p + shift; | |
60f067b4 JS |
3018 | part->munmap_this = true; |
3019 | ||
3020 | return 0; | |
3021 | } | |
3022 | ||
3023 | void bus_body_part_unmap(struct bus_body_part *part) { | |
3024 | ||
3025 | assert_se(part); | |
3026 | ||
3027 | if (part->memfd < 0) | |
3028 | return; | |
3029 | ||
f47781d8 | 3030 | if (!part->mmap_begin) |
60f067b4 JS |
3031 | return; |
3032 | ||
3033 | if (!part->munmap_this) | |
3034 | return; | |
3035 | ||
f47781d8 | 3036 | assert_se(munmap(part->mmap_begin, part->mapped) == 0); |
60f067b4 | 3037 | |
f47781d8 | 3038 | part->mmap_begin = NULL; |
60f067b4 JS |
3039 | part->data = NULL; |
3040 | part->mapped = 0; | |
3041 | part->munmap_this = false; | |
3042 | ||
3043 | return; | |
3044 | } | |
3045 | ||
3046 | static int buffer_peek(const void *p, uint32_t sz, size_t *rindex, size_t align, size_t nbytes, void **r) { | |
3047 | size_t k, start, end; | |
3048 | ||
3049 | assert(rindex); | |
3050 | assert(align > 0); | |
3051 | ||
3052 | start = ALIGN_TO((size_t) *rindex, align); | |
3053 | end = start + nbytes; | |
3054 | ||
3055 | if (end > sz) | |
3056 | return -EBADMSG; | |
3057 | ||
3058 | /* Verify that padding is 0 */ | |
3059 | for (k = *rindex; k < start; k++) | |
3060 | if (((const uint8_t*) p)[k] != 0) | |
3061 | return -EBADMSG; | |
3062 | ||
3063 | if (r) | |
3064 | *r = (uint8_t*) p + start; | |
3065 | ||
3066 | *rindex = end; | |
3067 | ||
3068 | return 1; | |
3069 | } | |
3070 | ||
3071 | static bool message_end_of_signature(sd_bus_message *m) { | |
3072 | struct bus_container *c; | |
3073 | ||
3074 | assert(m); | |
3075 | ||
3076 | c = message_get_container(m); | |
3077 | return !c->signature || c->signature[c->index] == 0; | |
3078 | } | |
3079 | ||
3080 | static bool message_end_of_array(sd_bus_message *m, size_t index) { | |
3081 | struct bus_container *c; | |
3082 | ||
3083 | assert(m); | |
3084 | ||
3085 | c = message_get_container(m); | |
3086 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3087 | return false; | |
3088 | ||
3089 | if (BUS_MESSAGE_IS_GVARIANT(m)) | |
3090 | return index >= c->end; | |
3091 | else { | |
3092 | assert(c->array_size); | |
3093 | return index >= c->begin + BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
3094 | } | |
3095 | } | |
3096 | ||
3097 | _public_ int sd_bus_message_at_end(sd_bus_message *m, int complete) { | |
3098 | assert_return(m, -EINVAL); | |
3099 | assert_return(m->sealed, -EPERM); | |
3100 | ||
3101 | if (complete && m->n_containers > 0) | |
3102 | return false; | |
3103 | ||
3104 | if (message_end_of_signature(m)) | |
3105 | return true; | |
3106 | ||
3107 | if (message_end_of_array(m, m->rindex)) | |
3108 | return true; | |
3109 | ||
3110 | return false; | |
3111 | } | |
3112 | ||
3113 | static struct bus_body_part* find_part(sd_bus_message *m, size_t index, size_t sz, void **p) { | |
3114 | struct bus_body_part *part; | |
3115 | size_t begin; | |
3116 | int r; | |
3117 | ||
3118 | assert(m); | |
3119 | ||
3120 | if (m->cached_rindex_part && index >= m->cached_rindex_part_begin) { | |
3121 | part = m->cached_rindex_part; | |
3122 | begin = m->cached_rindex_part_begin; | |
3123 | } else { | |
3124 | part = &m->body; | |
3125 | begin = 0; | |
3126 | } | |
3127 | ||
3128 | while (part) { | |
3129 | if (index < begin) | |
3130 | return NULL; | |
3131 | ||
3132 | if (index + sz <= begin + part->size) { | |
3133 | ||
3134 | r = bus_body_part_map(part); | |
3135 | if (r < 0) | |
3136 | return NULL; | |
3137 | ||
3138 | if (p) | |
3139 | *p = (uint8_t*) part->data + index - begin; | |
3140 | ||
3141 | m->cached_rindex_part = part; | |
3142 | m->cached_rindex_part_begin = begin; | |
3143 | ||
3144 | return part; | |
3145 | } | |
3146 | ||
3147 | begin += part->size; | |
3148 | part = part->next; | |
3149 | } | |
3150 | ||
3151 | return NULL; | |
3152 | } | |
3153 | ||
3154 | static int container_next_item(sd_bus_message *m, struct bus_container *c, size_t *rindex) { | |
3155 | int r; | |
3156 | ||
3157 | assert(m); | |
3158 | assert(c); | |
3159 | assert(rindex); | |
3160 | ||
3161 | if (!BUS_MESSAGE_IS_GVARIANT(m)) | |
3162 | return 0; | |
3163 | ||
3164 | if (c->enclosing == SD_BUS_TYPE_ARRAY) { | |
3165 | int sz; | |
3166 | ||
3167 | sz = bus_gvariant_get_size(c->signature); | |
3168 | if (sz < 0) { | |
3169 | int alignment; | |
3170 | ||
3171 | if (c->offset_index+1 >= c->n_offsets) | |
3172 | goto end; | |
3173 | ||
3174 | /* Variable-size array */ | |
3175 | ||
3176 | alignment = bus_gvariant_get_alignment(c->signature); | |
3177 | assert(alignment > 0); | |
3178 | ||
3179 | *rindex = ALIGN_TO(c->offsets[c->offset_index], alignment); | |
3180 | c->item_size = c->offsets[c->offset_index+1] - *rindex; | |
3181 | } else { | |
3182 | ||
3183 | if (c->offset_index+1 >= (c->end-c->begin)/sz) | |
3184 | goto end; | |
3185 | ||
3186 | /* Fixed-size array */ | |
3187 | *rindex = c->begin + (c->offset_index+1) * sz; | |
3188 | c->item_size = sz; | |
3189 | } | |
3190 | ||
3191 | c->offset_index++; | |
3192 | ||
f5e65279 | 3193 | } else if (IN_SET(c->enclosing, 0, SD_BUS_TYPE_STRUCT, SD_BUS_TYPE_DICT_ENTRY)) { |
60f067b4 JS |
3194 | |
3195 | int alignment; | |
3196 | size_t n, j; | |
3197 | ||
3198 | if (c->offset_index+1 >= c->n_offsets) | |
3199 | goto end; | |
3200 | ||
3201 | r = signature_element_length(c->signature + c->index, &n); | |
3202 | if (r < 0) | |
3203 | return r; | |
3204 | ||
3205 | r = signature_element_length(c->signature + c->index + n, &j); | |
3206 | if (r < 0) | |
3207 | return r; | |
3208 | else { | |
3209 | char t[j+1]; | |
3210 | memcpy(t, c->signature + c->index + n, j); | |
3211 | t[j] = 0; | |
3212 | ||
3213 | alignment = bus_gvariant_get_alignment(t); | |
3214 | } | |
3215 | ||
3216 | assert(alignment > 0); | |
3217 | ||
3218 | *rindex = ALIGN_TO(c->offsets[c->offset_index], alignment); | |
3219 | c->item_size = c->offsets[c->offset_index+1] - *rindex; | |
3220 | ||
3221 | c->offset_index++; | |
3222 | ||
3223 | } else if (c->enclosing == SD_BUS_TYPE_VARIANT) | |
3224 | goto end; | |
3225 | else | |
3226 | assert_not_reached("Unknown container type"); | |
3227 | ||
3228 | return 0; | |
3229 | ||
3230 | end: | |
3231 | /* Reached the end */ | |
3232 | *rindex = c->end; | |
3233 | c->item_size = 0; | |
3234 | return 0; | |
3235 | } | |
3236 | ||
3237 | ||
3238 | static int message_peek_body( | |
3239 | sd_bus_message *m, | |
3240 | size_t *rindex, | |
3241 | size_t align, | |
3242 | size_t nbytes, | |
3243 | void **ret) { | |
3244 | ||
3245 | size_t k, start, end, padding; | |
3246 | struct bus_body_part *part; | |
3247 | uint8_t *q; | |
3248 | ||
3249 | assert(m); | |
3250 | assert(rindex); | |
3251 | assert(align > 0); | |
3252 | ||
3253 | start = ALIGN_TO((size_t) *rindex, align); | |
3254 | padding = start - *rindex; | |
3255 | end = start + nbytes; | |
3256 | ||
e735f4d4 | 3257 | if (end > m->user_body_size) |
60f067b4 JS |
3258 | return -EBADMSG; |
3259 | ||
3260 | part = find_part(m, *rindex, padding, (void**) &q); | |
3261 | if (!part) | |
3262 | return -EBADMSG; | |
3263 | ||
3264 | if (q) { | |
3265 | /* Verify padding */ | |
3266 | for (k = 0; k < padding; k++) | |
3267 | if (q[k] != 0) | |
3268 | return -EBADMSG; | |
3269 | } | |
3270 | ||
3271 | part = find_part(m, start, nbytes, (void**) &q); | |
3272 | if (!part || (nbytes > 0 && !q)) | |
3273 | return -EBADMSG; | |
3274 | ||
3275 | *rindex = end; | |
3276 | ||
3277 | if (ret) | |
3278 | *ret = q; | |
3279 | ||
3280 | return 0; | |
3281 | } | |
3282 | ||
3283 | static bool validate_nul(const char *s, size_t l) { | |
3284 | ||
3285 | /* Check for NUL chars in the string */ | |
3286 | if (memchr(s, 0, l)) | |
3287 | return false; | |
3288 | ||
3289 | /* Check for NUL termination */ | |
3290 | if (s[l] != 0) | |
3291 | return false; | |
3292 | ||
3293 | return true; | |
3294 | } | |
3295 | ||
3296 | static bool validate_string(const char *s, size_t l) { | |
3297 | ||
3298 | if (!validate_nul(s, l)) | |
3299 | return false; | |
3300 | ||
3301 | /* Check if valid UTF8 */ | |
3302 | if (!utf8_is_valid(s)) | |
3303 | return false; | |
3304 | ||
3305 | return true; | |
3306 | } | |
3307 | ||
3308 | static bool validate_signature(const char *s, size_t l) { | |
3309 | ||
3310 | if (!validate_nul(s, l)) | |
3311 | return false; | |
3312 | ||
3313 | /* Check if valid signature */ | |
3314 | if (!signature_is_valid(s, true)) | |
3315 | return false; | |
3316 | ||
3317 | return true; | |
3318 | } | |
3319 | ||
3320 | static bool validate_object_path(const char *s, size_t l) { | |
3321 | ||
3322 | if (!validate_nul(s, l)) | |
3323 | return false; | |
3324 | ||
3325 | if (!object_path_is_valid(s)) | |
3326 | return false; | |
3327 | ||
3328 | return true; | |
3329 | } | |
3330 | ||
3331 | _public_ int sd_bus_message_read_basic(sd_bus_message *m, char type, void *p) { | |
3332 | struct bus_container *c; | |
3333 | size_t rindex; | |
3334 | void *q; | |
3335 | int r; | |
3336 | ||
3337 | assert_return(m, -EINVAL); | |
3338 | assert_return(m->sealed, -EPERM); | |
3339 | assert_return(bus_type_is_basic(type), -EINVAL); | |
3340 | ||
3341 | if (message_end_of_signature(m)) | |
3342 | return -ENXIO; | |
3343 | ||
3344 | if (message_end_of_array(m, m->rindex)) | |
3345 | return 0; | |
3346 | ||
3347 | c = message_get_container(m); | |
3348 | if (c->signature[c->index] != type) | |
3349 | return -ENXIO; | |
3350 | ||
3351 | rindex = m->rindex; | |
3352 | ||
3353 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
3354 | ||
3355 | if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE)) { | |
3356 | bool ok; | |
3357 | ||
3358 | r = message_peek_body(m, &rindex, 1, c->item_size, &q); | |
3359 | if (r < 0) | |
3360 | return r; | |
3361 | ||
3362 | if (type == SD_BUS_TYPE_STRING) | |
3363 | ok = validate_string(q, c->item_size-1); | |
3364 | else if (type == SD_BUS_TYPE_OBJECT_PATH) | |
3365 | ok = validate_object_path(q, c->item_size-1); | |
3366 | else | |
3367 | ok = validate_signature(q, c->item_size-1); | |
3368 | ||
3369 | if (!ok) | |
3370 | return -EBADMSG; | |
3371 | ||
3372 | if (p) | |
3373 | *(const char**) p = q; | |
3374 | } else { | |
3375 | int sz, align; | |
3376 | ||
3377 | sz = bus_gvariant_get_size(CHAR_TO_STR(type)); | |
3378 | assert(sz > 0); | |
3379 | if ((size_t) sz != c->item_size) | |
3380 | return -EBADMSG; | |
3381 | ||
3382 | align = bus_gvariant_get_alignment(CHAR_TO_STR(type)); | |
3383 | assert(align > 0); | |
3384 | ||
3385 | r = message_peek_body(m, &rindex, align, c->item_size, &q); | |
3386 | if (r < 0) | |
3387 | return r; | |
3388 | ||
3389 | switch (type) { | |
3390 | ||
3391 | case SD_BUS_TYPE_BYTE: | |
3392 | if (p) | |
3393 | *(uint8_t*) p = *(uint8_t*) q; | |
3394 | break; | |
3395 | ||
3396 | case SD_BUS_TYPE_BOOLEAN: | |
3397 | if (p) | |
3398 | *(int*) p = !!*(uint8_t*) q; | |
3399 | break; | |
3400 | ||
3401 | case SD_BUS_TYPE_INT16: | |
3402 | case SD_BUS_TYPE_UINT16: | |
3403 | if (p) | |
3404 | *(uint16_t*) p = BUS_MESSAGE_BSWAP16(m, *(uint16_t*) q); | |
3405 | break; | |
3406 | ||
3407 | case SD_BUS_TYPE_INT32: | |
3408 | case SD_BUS_TYPE_UINT32: | |
3409 | if (p) | |
3410 | *(uint32_t*) p = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3411 | break; | |
3412 | ||
3413 | case SD_BUS_TYPE_INT64: | |
3414 | case SD_BUS_TYPE_UINT64: | |
3415 | case SD_BUS_TYPE_DOUBLE: | |
3416 | if (p) | |
3417 | *(uint64_t*) p = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q); | |
3418 | break; | |
3419 | ||
3420 | case SD_BUS_TYPE_UNIX_FD: { | |
3421 | uint32_t j; | |
3422 | ||
3423 | j = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3424 | if (j >= m->n_fds) | |
3425 | return -EBADMSG; | |
3426 | ||
3427 | if (p) | |
3428 | *(int*) p = m->fds[j]; | |
3429 | ||
3430 | break; | |
3431 | } | |
3432 | ||
3433 | default: | |
3434 | assert_not_reached("unexpected type"); | |
3435 | } | |
3436 | } | |
3437 | ||
3438 | r = container_next_item(m, c, &rindex); | |
3439 | if (r < 0) | |
3440 | return r; | |
3441 | } else { | |
3442 | ||
60f067b4 JS |
3443 | if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH)) { |
3444 | uint32_t l; | |
3445 | bool ok; | |
3446 | ||
3447 | r = message_peek_body(m, &rindex, 4, 4, &q); | |
3448 | if (r < 0) | |
3449 | return r; | |
3450 | ||
3451 | l = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3452 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
3453 | if (r < 0) | |
3454 | return r; | |
3455 | ||
3456 | if (type == SD_BUS_TYPE_OBJECT_PATH) | |
3457 | ok = validate_object_path(q, l); | |
3458 | else | |
3459 | ok = validate_string(q, l); | |
3460 | if (!ok) | |
3461 | return -EBADMSG; | |
3462 | ||
3463 | if (p) | |
3464 | *(const char**) p = q; | |
3465 | ||
3466 | } else if (type == SD_BUS_TYPE_SIGNATURE) { | |
3467 | uint8_t l; | |
3468 | ||
3469 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
3470 | if (r < 0) | |
3471 | return r; | |
3472 | ||
3473 | l = *(uint8_t*) q; | |
3474 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
3475 | if (r < 0) | |
3476 | return r; | |
3477 | ||
3478 | if (!validate_signature(q, l)) | |
3479 | return -EBADMSG; | |
3480 | ||
3481 | if (p) | |
3482 | *(const char**) p = q; | |
3483 | ||
3484 | } else { | |
3485 | ssize_t sz, align; | |
3486 | ||
3487 | align = bus_type_get_alignment(type); | |
3488 | assert(align > 0); | |
3489 | ||
3490 | sz = bus_type_get_size(type); | |
3491 | assert(sz > 0); | |
3492 | ||
3493 | r = message_peek_body(m, &rindex, align, sz, &q); | |
3494 | if (r < 0) | |
3495 | return r; | |
3496 | ||
3497 | switch (type) { | |
3498 | ||
3499 | case SD_BUS_TYPE_BYTE: | |
3500 | if (p) | |
3501 | *(uint8_t*) p = *(uint8_t*) q; | |
3502 | break; | |
3503 | ||
3504 | case SD_BUS_TYPE_BOOLEAN: | |
3505 | if (p) | |
3506 | *(int*) p = !!*(uint32_t*) q; | |
3507 | break; | |
3508 | ||
3509 | case SD_BUS_TYPE_INT16: | |
3510 | case SD_BUS_TYPE_UINT16: | |
3511 | if (p) | |
3512 | *(uint16_t*) p = BUS_MESSAGE_BSWAP16(m, *(uint16_t*) q); | |
3513 | break; | |
3514 | ||
3515 | case SD_BUS_TYPE_INT32: | |
3516 | case SD_BUS_TYPE_UINT32: | |
3517 | if (p) | |
3518 | *(uint32_t*) p = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3519 | break; | |
3520 | ||
3521 | case SD_BUS_TYPE_INT64: | |
3522 | case SD_BUS_TYPE_UINT64: | |
3523 | case SD_BUS_TYPE_DOUBLE: | |
3524 | if (p) | |
3525 | *(uint64_t*) p = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q); | |
3526 | break; | |
3527 | ||
3528 | case SD_BUS_TYPE_UNIX_FD: { | |
3529 | uint32_t j; | |
3530 | ||
3531 | j = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3532 | if (j >= m->n_fds) | |
3533 | return -EBADMSG; | |
3534 | ||
3535 | if (p) | |
3536 | *(int*) p = m->fds[j]; | |
3537 | break; | |
3538 | } | |
3539 | ||
3540 | default: | |
3541 | assert_not_reached("Unknown basic type..."); | |
3542 | } | |
3543 | } | |
3544 | } | |
3545 | ||
3546 | m->rindex = rindex; | |
3547 | ||
3548 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3549 | c->index++; | |
3550 | ||
3551 | return 1; | |
3552 | } | |
3553 | ||
3554 | static int bus_message_enter_array( | |
3555 | sd_bus_message *m, | |
3556 | struct bus_container *c, | |
3557 | const char *contents, | |
3558 | uint32_t **array_size, | |
3559 | size_t *item_size, | |
3560 | size_t **offsets, | |
3561 | size_t *n_offsets) { | |
3562 | ||
3563 | size_t rindex; | |
3564 | void *q; | |
3565 | int r, alignment; | |
3566 | ||
3567 | assert(m); | |
3568 | assert(c); | |
3569 | assert(contents); | |
3570 | assert(array_size); | |
3571 | assert(item_size); | |
3572 | assert(offsets); | |
3573 | assert(n_offsets); | |
3574 | ||
3575 | if (!signature_is_single(contents, true)) | |
3576 | return -EINVAL; | |
3577 | ||
3578 | if (!c->signature || c->signature[c->index] == 0) | |
3579 | return -ENXIO; | |
3580 | ||
3581 | if (c->signature[c->index] != SD_BUS_TYPE_ARRAY) | |
3582 | return -ENXIO; | |
3583 | ||
3584 | if (!startswith(c->signature + c->index + 1, contents)) | |
3585 | return -ENXIO; | |
3586 | ||
3587 | rindex = m->rindex; | |
3588 | ||
3589 | if (!BUS_MESSAGE_IS_GVARIANT(m)) { | |
3590 | /* dbus1 */ | |
3591 | ||
3592 | r = message_peek_body(m, &rindex, 4, 4, &q); | |
3593 | if (r < 0) | |
3594 | return r; | |
3595 | ||
3596 | if (BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q) > BUS_ARRAY_MAX_SIZE) | |
3597 | return -EBADMSG; | |
3598 | ||
3599 | alignment = bus_type_get_alignment(contents[0]); | |
3600 | if (alignment < 0) | |
3601 | return alignment; | |
3602 | ||
3603 | r = message_peek_body(m, &rindex, alignment, 0, NULL); | |
3604 | if (r < 0) | |
3605 | return r; | |
3606 | ||
3607 | *array_size = (uint32_t*) q; | |
3608 | ||
3609 | } else if (c->item_size <= 0) { | |
3610 | ||
3611 | /* gvariant: empty array */ | |
3612 | *item_size = 0; | |
3613 | *offsets = NULL; | |
3614 | *n_offsets = 0; | |
3615 | ||
3616 | } else if (bus_gvariant_is_fixed_size(contents)) { | |
3617 | ||
3618 | /* gvariant: fixed length array */ | |
3619 | *item_size = bus_gvariant_get_size(contents); | |
3620 | *offsets = NULL; | |
3621 | *n_offsets = 0; | |
3622 | ||
3623 | } else { | |
3624 | size_t where, p = 0, framing, sz; | |
3625 | unsigned i; | |
3626 | ||
3627 | /* gvariant: variable length array */ | |
e735f4d4 | 3628 | sz = bus_gvariant_determine_word_size(c->item_size, 0); |
60f067b4 JS |
3629 | |
3630 | where = rindex + c->item_size - sz; | |
3631 | r = message_peek_body(m, &where, 1, sz, &q); | |
3632 | if (r < 0) | |
3633 | return r; | |
3634 | ||
e735f4d4 | 3635 | framing = bus_gvariant_read_word_le(q, sz); |
60f067b4 JS |
3636 | if (framing > c->item_size - sz) |
3637 | return -EBADMSG; | |
3638 | if ((c->item_size - framing) % sz != 0) | |
3639 | return -EBADMSG; | |
3640 | ||
3641 | *n_offsets = (c->item_size - framing) / sz; | |
3642 | ||
3643 | where = rindex + framing; | |
3644 | r = message_peek_body(m, &where, 1, *n_offsets * sz, &q); | |
3645 | if (r < 0) | |
3646 | return r; | |
3647 | ||
3648 | *offsets = new(size_t, *n_offsets); | |
3649 | if (!*offsets) | |
3650 | return -ENOMEM; | |
3651 | ||
3652 | for (i = 0; i < *n_offsets; i++) { | |
3653 | size_t x; | |
3654 | ||
e735f4d4 | 3655 | x = bus_gvariant_read_word_le((uint8_t*) q + i * sz, sz); |
60f067b4 JS |
3656 | if (x > c->item_size - sz) |
3657 | return -EBADMSG; | |
3658 | if (x < p) | |
3659 | return -EBADMSG; | |
3660 | ||
3661 | (*offsets)[i] = rindex + x; | |
3662 | p = x; | |
3663 | } | |
3664 | ||
3665 | *item_size = (*offsets)[0] - rindex; | |
3666 | } | |
3667 | ||
3668 | m->rindex = rindex; | |
3669 | ||
3670 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3671 | c->index += 1 + strlen(contents); | |
3672 | ||
3673 | return 1; | |
3674 | } | |
3675 | ||
3676 | static int bus_message_enter_variant( | |
3677 | sd_bus_message *m, | |
3678 | struct bus_container *c, | |
3679 | const char *contents, | |
3680 | size_t *item_size) { | |
3681 | ||
3682 | size_t rindex; | |
3683 | uint8_t l; | |
3684 | void *q; | |
3685 | int r; | |
3686 | ||
3687 | assert(m); | |
3688 | assert(c); | |
3689 | assert(contents); | |
3690 | assert(item_size); | |
3691 | ||
3692 | if (!signature_is_single(contents, false)) | |
3693 | return -EINVAL; | |
3694 | ||
3695 | if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN) | |
3696 | return -EINVAL; | |
3697 | ||
3698 | if (!c->signature || c->signature[c->index] == 0) | |
3699 | return -ENXIO; | |
3700 | ||
3701 | if (c->signature[c->index] != SD_BUS_TYPE_VARIANT) | |
3702 | return -ENXIO; | |
3703 | ||
3704 | rindex = m->rindex; | |
3705 | ||
3706 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
3707 | size_t k, where; | |
3708 | ||
3709 | k = strlen(contents); | |
3710 | if (1+k > c->item_size) | |
3711 | return -EBADMSG; | |
3712 | ||
3713 | where = rindex + c->item_size - (1+k); | |
3714 | r = message_peek_body(m, &where, 1, 1+k, &q); | |
3715 | if (r < 0) | |
3716 | return r; | |
3717 | ||
3718 | if (*(char*) q != 0) | |
3719 | return -EBADMSG; | |
3720 | ||
3721 | if (memcmp((uint8_t*) q+1, contents, k)) | |
3722 | return -ENXIO; | |
3723 | ||
3724 | *item_size = c->item_size - (1+k); | |
3725 | ||
3726 | } else { | |
3727 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
3728 | if (r < 0) | |
3729 | return r; | |
3730 | ||
3731 | l = *(uint8_t*) q; | |
3732 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
3733 | if (r < 0) | |
3734 | return r; | |
3735 | ||
3736 | if (!validate_signature(q, l)) | |
3737 | return -EBADMSG; | |
3738 | ||
3739 | if (!streq(q, contents)) | |
3740 | return -ENXIO; | |
3741 | } | |
3742 | ||
3743 | m->rindex = rindex; | |
3744 | ||
3745 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3746 | c->index++; | |
3747 | ||
3748 | return 1; | |
3749 | } | |
3750 | ||
3751 | static int build_struct_offsets( | |
3752 | sd_bus_message *m, | |
3753 | const char *signature, | |
3754 | size_t size, | |
3755 | size_t *item_size, | |
3756 | size_t **offsets, | |
3757 | size_t *n_offsets) { | |
3758 | ||
3759 | unsigned n_variable = 0, n_total = 0, v; | |
3760 | size_t previous = 0, where; | |
3761 | const char *p; | |
3762 | size_t sz; | |
3763 | void *q; | |
3764 | int r; | |
3765 | ||
3766 | assert(m); | |
3767 | assert(item_size); | |
3768 | assert(offsets); | |
3769 | assert(n_offsets); | |
3770 | ||
3771 | if (isempty(signature)) { | |
5fd56512 MP |
3772 | /* Unary type is encoded as *fixed* 1 byte padding */ |
3773 | r = message_peek_body(m, &m->rindex, 1, 1, &q); | |
3774 | if (r < 0) | |
3775 | return r; | |
3776 | ||
3777 | if (*(uint8_t *) q != 0) | |
3778 | return -EBADMSG; | |
3779 | ||
60f067b4 JS |
3780 | *item_size = 0; |
3781 | *offsets = NULL; | |
3782 | *n_offsets = 0; | |
3783 | return 0; | |
3784 | } | |
3785 | ||
e735f4d4 | 3786 | sz = bus_gvariant_determine_word_size(size, 0); |
60f067b4 JS |
3787 | if (sz <= 0) |
3788 | return -EBADMSG; | |
3789 | ||
3790 | /* First, loop over signature and count variable elements and | |
3791 | * elements in general. We use this to know how large the | |
3792 | * offset array is at the end of the structure. Note that | |
3793 | * GVariant only stores offsets for all variable size elements | |
3794 | * that are not the last item. */ | |
3795 | ||
3796 | p = signature; | |
3797 | while (*p != 0) { | |
3798 | size_t n; | |
3799 | ||
3800 | r = signature_element_length(p, &n); | |
3801 | if (r < 0) | |
3802 | return r; | |
3803 | else { | |
3804 | char t[n+1]; | |
3805 | ||
3806 | memcpy(t, p, n); | |
3807 | t[n] = 0; | |
3808 | ||
3809 | r = bus_gvariant_is_fixed_size(t); | |
3810 | } | |
3811 | ||
3812 | if (r < 0) | |
3813 | return r; | |
3814 | if (r == 0 && p[n] != 0) /* except the last item */ | |
aa27b158 | 3815 | n_variable++; |
60f067b4 JS |
3816 | n_total++; |
3817 | ||
3818 | p += n; | |
3819 | } | |
3820 | ||
3821 | if (size < n_variable * sz) | |
3822 | return -EBADMSG; | |
3823 | ||
3824 | where = m->rindex + size - (n_variable * sz); | |
3825 | r = message_peek_body(m, &where, 1, n_variable * sz, &q); | |
3826 | if (r < 0) | |
3827 | return r; | |
3828 | ||
3829 | v = n_variable; | |
3830 | ||
3831 | *offsets = new(size_t, n_total); | |
3832 | if (!*offsets) | |
3833 | return -ENOMEM; | |
3834 | ||
3835 | *n_offsets = 0; | |
3836 | ||
3837 | /* Second, loop again and build an offset table */ | |
3838 | p = signature; | |
3839 | while (*p != 0) { | |
3840 | size_t n, offset; | |
3841 | int k; | |
3842 | ||
3843 | r = signature_element_length(p, &n); | |
3844 | if (r < 0) | |
3845 | return r; | |
3846 | else { | |
3847 | char t[n+1]; | |
3848 | ||
3849 | memcpy(t, p, n); | |
3850 | t[n] = 0; | |
3851 | ||
3852 | k = bus_gvariant_get_size(t); | |
3853 | if (k < 0) { | |
3854 | size_t x; | |
3855 | ||
3856 | /* variable size */ | |
3857 | if (v > 0) { | |
3858 | v--; | |
3859 | ||
e735f4d4 | 3860 | x = bus_gvariant_read_word_le((uint8_t*) q + v*sz, sz); |
60f067b4 JS |
3861 | if (x >= size) |
3862 | return -EBADMSG; | |
3863 | if (m->rindex + x < previous) | |
3864 | return -EBADMSG; | |
3865 | } else | |
3866 | /* The last item's end | |
3867 | * is determined from | |
3868 | * the start of the | |
3869 | * offset array */ | |
3870 | x = size - (n_variable * sz); | |
3871 | ||
3872 | offset = m->rindex + x; | |
3873 | ||
3874 | } else { | |
3875 | size_t align; | |
3876 | ||
3877 | /* fixed size */ | |
3878 | align = bus_gvariant_get_alignment(t); | |
3879 | assert(align > 0); | |
3880 | ||
3881 | offset = (*n_offsets == 0 ? m->rindex : ALIGN_TO((*offsets)[*n_offsets-1], align)) + k; | |
3882 | } | |
3883 | } | |
3884 | ||
3885 | previous = (*offsets)[(*n_offsets)++] = offset; | |
3886 | p += n; | |
3887 | } | |
3888 | ||
3889 | assert(v == 0); | |
3890 | assert(*n_offsets == n_total); | |
3891 | ||
3892 | *item_size = (*offsets)[0] - m->rindex; | |
3893 | return 0; | |
3894 | } | |
3895 | ||
3896 | static int enter_struct_or_dict_entry( | |
3897 | sd_bus_message *m, | |
3898 | struct bus_container *c, | |
3899 | const char *contents, | |
3900 | size_t *item_size, | |
3901 | size_t **offsets, | |
3902 | size_t *n_offsets) { | |
3903 | ||
3904 | int r; | |
3905 | ||
3906 | assert(m); | |
3907 | assert(c); | |
3908 | assert(contents); | |
3909 | assert(item_size); | |
3910 | assert(offsets); | |
3911 | assert(n_offsets); | |
3912 | ||
3913 | if (!BUS_MESSAGE_IS_GVARIANT(m)) { | |
3914 | ||
3915 | /* dbus1 */ | |
3916 | r = message_peek_body(m, &m->rindex, 8, 0, NULL); | |
3917 | if (r < 0) | |
3918 | return r; | |
3919 | ||
60f067b4 JS |
3920 | } else |
3921 | /* gvariant with contents */ | |
3922 | return build_struct_offsets(m, contents, c->item_size, item_size, offsets, n_offsets); | |
3923 | ||
3924 | return 0; | |
3925 | } | |
3926 | ||
3927 | static int bus_message_enter_struct( | |
3928 | sd_bus_message *m, | |
3929 | struct bus_container *c, | |
3930 | const char *contents, | |
3931 | size_t *item_size, | |
3932 | size_t **offsets, | |
3933 | size_t *n_offsets) { | |
3934 | ||
3935 | size_t l; | |
3936 | int r; | |
3937 | ||
3938 | assert(m); | |
3939 | assert(c); | |
3940 | assert(contents); | |
3941 | assert(item_size); | |
3942 | assert(offsets); | |
3943 | assert(n_offsets); | |
3944 | ||
3945 | if (!signature_is_valid(contents, false)) | |
3946 | return -EINVAL; | |
3947 | ||
3948 | if (!c->signature || c->signature[c->index] == 0) | |
3949 | return -ENXIO; | |
3950 | ||
3951 | l = strlen(contents); | |
3952 | ||
3953 | if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN || | |
3954 | !startswith(c->signature + c->index + 1, contents) || | |
3955 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END) | |
3956 | return -ENXIO; | |
3957 | ||
3958 | r = enter_struct_or_dict_entry(m, c, contents, item_size, offsets, n_offsets); | |
3959 | if (r < 0) | |
3960 | return r; | |
3961 | ||
3962 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3963 | c->index += 1 + l + 1; | |
3964 | ||
3965 | return 1; | |
3966 | } | |
3967 | ||
3968 | static int bus_message_enter_dict_entry( | |
3969 | sd_bus_message *m, | |
3970 | struct bus_container *c, | |
3971 | const char *contents, | |
3972 | size_t *item_size, | |
3973 | size_t **offsets, | |
3974 | size_t *n_offsets) { | |
3975 | ||
3976 | size_t l; | |
3977 | int r; | |
3978 | ||
3979 | assert(m); | |
3980 | assert(c); | |
3981 | assert(contents); | |
3982 | ||
3983 | if (!signature_is_pair(contents)) | |
3984 | return -EINVAL; | |
3985 | ||
3986 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3987 | return -ENXIO; | |
3988 | ||
3989 | if (!c->signature || c->signature[c->index] == 0) | |
3990 | return 0; | |
3991 | ||
3992 | l = strlen(contents); | |
3993 | ||
3994 | if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN || | |
3995 | !startswith(c->signature + c->index + 1, contents) || | |
3996 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END) | |
3997 | return -ENXIO; | |
3998 | ||
3999 | r = enter_struct_or_dict_entry(m, c, contents, item_size, offsets, n_offsets); | |
4000 | if (r < 0) | |
4001 | return r; | |
4002 | ||
4003 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
4004 | c->index += 1 + l + 1; | |
4005 | ||
4006 | return 1; | |
4007 | } | |
4008 | ||
4009 | _public_ int sd_bus_message_enter_container(sd_bus_message *m, | |
4010 | char type, | |
4011 | const char *contents) { | |
4012 | struct bus_container *c, *w; | |
4013 | uint32_t *array_size = NULL; | |
4014 | char *signature; | |
4015 | size_t before; | |
4016 | size_t *offsets = NULL; | |
4017 | size_t n_offsets = 0, item_size = 0; | |
4018 | int r; | |
4019 | ||
4020 | assert_return(m, -EINVAL); | |
4021 | assert_return(m->sealed, -EPERM); | |
4022 | assert_return(type != 0 || !contents, -EINVAL); | |
4023 | ||
4024 | if (type == 0 || !contents) { | |
4025 | const char *cc; | |
4026 | char tt; | |
4027 | ||
4028 | /* Allow entering into anonymous containers */ | |
4029 | r = sd_bus_message_peek_type(m, &tt, &cc); | |
4030 | if (r < 0) | |
4031 | return r; | |
4032 | ||
4033 | if (type != 0 && type != tt) | |
4034 | return -ENXIO; | |
4035 | ||
4036 | if (contents && !streq(contents, cc)) | |
4037 | return -ENXIO; | |
4038 | ||
4039 | type = tt; | |
4040 | contents = cc; | |
4041 | } | |
4042 | ||
4043 | /* | |
4044 | * We enforce a global limit on container depth, that is much | |
4045 | * higher than the 32 structs and 32 arrays the specification | |
4046 | * mandates. This is simpler to implement for us, and we need | |
4047 | * this only to ensure our container array doesn't grow | |
4048 | * without bounds. We are happy to return any data from a | |
4049 | * message as long as the data itself is valid, even if the | |
4050 | * overall message might be not. | |
4051 | * | |
4052 | * Note that the message signature is validated when | |
4053 | * parsing the headers, and that validation does check the | |
4054 | * 32/32 limit. | |
4055 | * | |
4056 | * Note that the specification defines no limits on the depth | |
4057 | * of stacked variants, but we do. | |
4058 | */ | |
4059 | if (m->n_containers >= BUS_CONTAINER_DEPTH) | |
4060 | return -EBADMSG; | |
4061 | ||
4062 | if (!GREEDY_REALLOC(m->containers, m->containers_allocated, m->n_containers + 1)) | |
4063 | return -ENOMEM; | |
4064 | ||
4065 | if (message_end_of_signature(m)) | |
4066 | return -ENXIO; | |
4067 | ||
4068 | if (message_end_of_array(m, m->rindex)) | |
4069 | return 0; | |
4070 | ||
4071 | c = message_get_container(m); | |
4072 | ||
4073 | signature = strdup(contents); | |
4074 | if (!signature) | |
4075 | return -ENOMEM; | |
4076 | ||
4077 | c->saved_index = c->index; | |
4078 | before = m->rindex; | |
4079 | ||
4080 | if (type == SD_BUS_TYPE_ARRAY) | |
4081 | r = bus_message_enter_array(m, c, contents, &array_size, &item_size, &offsets, &n_offsets); | |
4082 | else if (type == SD_BUS_TYPE_VARIANT) | |
4083 | r = bus_message_enter_variant(m, c, contents, &item_size); | |
4084 | else if (type == SD_BUS_TYPE_STRUCT) | |
4085 | r = bus_message_enter_struct(m, c, contents, &item_size, &offsets, &n_offsets); | |
4086 | else if (type == SD_BUS_TYPE_DICT_ENTRY) | |
4087 | r = bus_message_enter_dict_entry(m, c, contents, &item_size, &offsets, &n_offsets); | |
4088 | else | |
4089 | r = -EINVAL; | |
4090 | ||
4091 | if (r <= 0) { | |
4092 | free(signature); | |
4093 | free(offsets); | |
4094 | return r; | |
4095 | } | |
4096 | ||
4097 | /* OK, let's fill it in */ | |
4098 | w = m->containers + m->n_containers++; | |
4099 | w->enclosing = type; | |
4100 | w->signature = signature; | |
4101 | w->peeked_signature = NULL; | |
4102 | w->index = 0; | |
4103 | ||
4104 | w->before = before; | |
4105 | w->begin = m->rindex; | |
5fd56512 MP |
4106 | |
4107 | /* Unary type has fixed size of 1, but virtual size of 0 */ | |
4108 | if (BUS_MESSAGE_IS_GVARIANT(m) && | |
4109 | type == SD_BUS_TYPE_STRUCT && | |
4110 | isempty(signature)) | |
4111 | w->end = m->rindex + 0; | |
4112 | else | |
4113 | w->end = m->rindex + c->item_size; | |
60f067b4 JS |
4114 | |
4115 | w->array_size = array_size; | |
4116 | w->item_size = item_size; | |
4117 | w->offsets = offsets; | |
4118 | w->n_offsets = n_offsets; | |
4119 | w->offset_index = 0; | |
4120 | ||
4121 | return 1; | |
4122 | } | |
4123 | ||
4124 | _public_ int sd_bus_message_exit_container(sd_bus_message *m) { | |
4125 | struct bus_container *c; | |
4126 | unsigned saved; | |
4127 | int r; | |
4128 | ||
4129 | assert_return(m, -EINVAL); | |
4130 | assert_return(m->sealed, -EPERM); | |
4131 | assert_return(m->n_containers > 0, -ENXIO); | |
4132 | ||
4133 | c = message_get_container(m); | |
4134 | ||
4135 | if (c->enclosing != SD_BUS_TYPE_ARRAY) { | |
4136 | if (c->signature && c->signature[c->index] != 0) | |
4137 | return -EBUSY; | |
4138 | } | |
4139 | ||
4140 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
4141 | if (m->rindex < c->end) | |
4142 | return -EBUSY; | |
4143 | ||
4144 | } else if (c->enclosing == SD_BUS_TYPE_ARRAY) { | |
4145 | uint32_t l; | |
4146 | ||
4147 | l = BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
4148 | if (c->begin + l != m->rindex) | |
4149 | return -EBUSY; | |
4150 | } | |
4151 | ||
4152 | free(c->signature); | |
4153 | free(c->peeked_signature); | |
4154 | free(c->offsets); | |
4155 | m->n_containers--; | |
4156 | ||
4157 | c = message_get_container(m); | |
4158 | ||
4159 | saved = c->index; | |
4160 | c->index = c->saved_index; | |
4161 | r = container_next_item(m, c, &m->rindex); | |
4162 | c->index = saved; | |
4163 | if (r < 0) | |
4164 | return r; | |
4165 | ||
4166 | return 1; | |
4167 | } | |
4168 | ||
4169 | static void message_quit_container(sd_bus_message *m) { | |
4170 | struct bus_container *c; | |
4171 | ||
4172 | assert(m); | |
4173 | assert(m->sealed); | |
4174 | assert(m->n_containers > 0); | |
4175 | ||
4176 | c = message_get_container(m); | |
4177 | ||
4178 | /* Undo seeks */ | |
4179 | assert(m->rindex >= c->before); | |
4180 | m->rindex = c->before; | |
4181 | ||
4182 | /* Free container */ | |
4183 | free(c->signature); | |
4184 | free(c->offsets); | |
4185 | m->n_containers--; | |
4186 | ||
4187 | /* Correct index of new top-level container */ | |
4188 | c = message_get_container(m); | |
4189 | c->index = c->saved_index; | |
4190 | } | |
4191 | ||
4192 | _public_ int sd_bus_message_peek_type(sd_bus_message *m, char *type, const char **contents) { | |
4193 | struct bus_container *c; | |
4194 | int r; | |
4195 | ||
4196 | assert_return(m, -EINVAL); | |
4197 | assert_return(m->sealed, -EPERM); | |
4198 | ||
4199 | if (message_end_of_signature(m)) | |
4200 | goto eof; | |
4201 | ||
4202 | if (message_end_of_array(m, m->rindex)) | |
4203 | goto eof; | |
4204 | ||
4205 | c = message_get_container(m); | |
4206 | ||
4207 | if (bus_type_is_basic(c->signature[c->index])) { | |
4208 | if (contents) | |
4209 | *contents = NULL; | |
4210 | if (type) | |
4211 | *type = c->signature[c->index]; | |
4212 | return 1; | |
4213 | } | |
4214 | ||
4215 | if (c->signature[c->index] == SD_BUS_TYPE_ARRAY) { | |
4216 | ||
4217 | if (contents) { | |
4218 | size_t l; | |
4219 | char *sig; | |
4220 | ||
4221 | r = signature_element_length(c->signature+c->index+1, &l); | |
4222 | if (r < 0) | |
4223 | return r; | |
4224 | ||
4225 | assert(l >= 1); | |
4226 | ||
4227 | sig = strndup(c->signature + c->index + 1, l); | |
4228 | if (!sig) | |
4229 | return -ENOMEM; | |
4230 | ||
4231 | free(c->peeked_signature); | |
4232 | *contents = c->peeked_signature = sig; | |
4233 | } | |
4234 | ||
4235 | if (type) | |
4236 | *type = SD_BUS_TYPE_ARRAY; | |
4237 | ||
4238 | return 1; | |
4239 | } | |
4240 | ||
f5e65279 | 4241 | if (IN_SET(c->signature[c->index], SD_BUS_TYPE_STRUCT_BEGIN, SD_BUS_TYPE_DICT_ENTRY_BEGIN)) { |
60f067b4 JS |
4242 | |
4243 | if (contents) { | |
4244 | size_t l; | |
4245 | char *sig; | |
4246 | ||
4247 | r = signature_element_length(c->signature+c->index, &l); | |
4248 | if (r < 0) | |
4249 | return r; | |
4250 | ||
4251 | assert(l >= 2); | |
4252 | sig = strndup(c->signature + c->index + 1, l - 2); | |
4253 | if (!sig) | |
4254 | return -ENOMEM; | |
4255 | ||
4256 | free(c->peeked_signature); | |
4257 | *contents = c->peeked_signature = sig; | |
4258 | } | |
4259 | ||
4260 | if (type) | |
4261 | *type = c->signature[c->index] == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY; | |
4262 | ||
4263 | return 1; | |
4264 | } | |
4265 | ||
4266 | if (c->signature[c->index] == SD_BUS_TYPE_VARIANT) { | |
4267 | if (contents) { | |
4268 | void *q; | |
4269 | ||
4270 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
4271 | size_t k; | |
4272 | ||
4273 | if (c->item_size < 2) | |
4274 | return -EBADMSG; | |
4275 | ||
4276 | /* Look for the NUL delimiter that | |
4277 | separates the payload from the | |
4278 | signature. Since the body might be | |
4279 | in a different part that then the | |
4280 | signature we map byte by byte. */ | |
4281 | ||
4282 | for (k = 2; k <= c->item_size; k++) { | |
4283 | size_t where; | |
4284 | ||
4285 | where = m->rindex + c->item_size - k; | |
4286 | r = message_peek_body(m, &where, 1, k, &q); | |
4287 | if (r < 0) | |
4288 | return r; | |
4289 | ||
4290 | if (*(char*) q == 0) | |
4291 | break; | |
4292 | } | |
4293 | ||
4294 | if (k > c->item_size) | |
4295 | return -EBADMSG; | |
4296 | ||
4297 | free(c->peeked_signature); | |
4298 | c->peeked_signature = strndup((char*) q + 1, k - 1); | |
4299 | if (!c->peeked_signature) | |
4300 | return -ENOMEM; | |
4301 | ||
4302 | if (!signature_is_valid(c->peeked_signature, true)) | |
4303 | return -EBADMSG; | |
4304 | ||
4305 | *contents = c->peeked_signature; | |
4306 | } else { | |
4307 | size_t rindex, l; | |
4308 | ||
4309 | rindex = m->rindex; | |
4310 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
4311 | if (r < 0) | |
4312 | return r; | |
4313 | ||
4314 | l = *(uint8_t*) q; | |
4315 | r = message_peek_body(m, &rindex, 1, l+1, &q); | |
4316 | if (r < 0) | |
4317 | return r; | |
4318 | ||
4319 | if (!validate_signature(q, l)) | |
4320 | return -EBADMSG; | |
4321 | ||
4322 | *contents = q; | |
4323 | } | |
4324 | } | |
4325 | ||
4326 | if (type) | |
4327 | *type = SD_BUS_TYPE_VARIANT; | |
4328 | ||
4329 | return 1; | |
4330 | } | |
4331 | ||
4332 | return -EINVAL; | |
4333 | ||
4334 | eof: | |
4335 | if (type) | |
4336 | *type = 0; | |
4337 | if (contents) | |
4338 | *contents = NULL; | |
4339 | return 0; | |
4340 | } | |
4341 | ||
4342 | _public_ int sd_bus_message_rewind(sd_bus_message *m, int complete) { | |
4343 | struct bus_container *c; | |
4344 | ||
4345 | assert_return(m, -EINVAL); | |
4346 | assert_return(m->sealed, -EPERM); | |
4347 | ||
4348 | if (complete) { | |
4349 | message_reset_containers(m); | |
4350 | m->rindex = 0; | |
4351 | ||
4352 | c = message_get_container(m); | |
4353 | } else { | |
4354 | c = message_get_container(m); | |
4355 | ||
4356 | c->offset_index = 0; | |
4357 | c->index = 0; | |
4358 | m->rindex = c->begin; | |
4359 | } | |
4360 | ||
4361 | c->offset_index = 0; | |
4362 | c->item_size = (c->n_offsets > 0 ? c->offsets[0] : c->end) - c->begin; | |
4363 | ||
4364 | return !isempty(c->signature); | |
4365 | } | |
4366 | ||
4367 | static int message_read_ap( | |
4368 | sd_bus_message *m, | |
4369 | const char *types, | |
4370 | va_list ap) { | |
4371 | ||
4372 | unsigned n_array, n_struct; | |
4373 | TypeStack stack[BUS_CONTAINER_DEPTH]; | |
4374 | unsigned stack_ptr = 0; | |
4375 | unsigned n_loop = 0; | |
4376 | int r; | |
4377 | ||
4378 | assert(m); | |
4379 | ||
4380 | if (isempty(types)) | |
4381 | return 0; | |
4382 | ||
4383 | /* Ideally, we'd just call ourselves recursively on every | |
4384 | * complex type. However, the state of a va_list that is | |
4385 | * passed to a function is undefined after that function | |
4386 | * returns. This means we need to docode the va_list linearly | |
4387 | * in a single stackframe. We hence implement our own | |
4388 | * home-grown stack in an array. */ | |
4389 | ||
4390 | n_array = (unsigned) -1; /* length of current array entries */ | |
4391 | n_struct = strlen(types); /* length of current struct contents signature */ | |
4392 | ||
4393 | for (;;) { | |
4394 | const char *t; | |
4395 | ||
4396 | n_loop++; | |
4397 | ||
4398 | if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) { | |
4399 | r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array); | |
4400 | if (r < 0) | |
4401 | return r; | |
4402 | if (r == 0) | |
4403 | break; | |
4404 | ||
4405 | r = sd_bus_message_exit_container(m); | |
4406 | if (r < 0) | |
4407 | return r; | |
4408 | ||
4409 | continue; | |
4410 | } | |
4411 | ||
4412 | t = types; | |
4413 | if (n_array != (unsigned) -1) | |
aa27b158 | 4414 | n_array--; |
60f067b4 | 4415 | else { |
aa27b158 | 4416 | types++; |
60f067b4 JS |
4417 | n_struct--; |
4418 | } | |
4419 | ||
4420 | switch (*t) { | |
4421 | ||
4422 | case SD_BUS_TYPE_BYTE: | |
4423 | case SD_BUS_TYPE_BOOLEAN: | |
4424 | case SD_BUS_TYPE_INT16: | |
4425 | case SD_BUS_TYPE_UINT16: | |
4426 | case SD_BUS_TYPE_INT32: | |
4427 | case SD_BUS_TYPE_UINT32: | |
4428 | case SD_BUS_TYPE_INT64: | |
4429 | case SD_BUS_TYPE_UINT64: | |
4430 | case SD_BUS_TYPE_DOUBLE: | |
4431 | case SD_BUS_TYPE_STRING: | |
4432 | case SD_BUS_TYPE_OBJECT_PATH: | |
4433 | case SD_BUS_TYPE_SIGNATURE: | |
4434 | case SD_BUS_TYPE_UNIX_FD: { | |
4435 | void *p; | |
4436 | ||
4437 | p = va_arg(ap, void*); | |
4438 | r = sd_bus_message_read_basic(m, *t, p); | |
4439 | if (r < 0) | |
4440 | return r; | |
4441 | if (r == 0) { | |
4442 | if (n_loop <= 1) | |
4443 | return 0; | |
4444 | ||
4445 | return -ENXIO; | |
4446 | } | |
4447 | ||
4448 | break; | |
4449 | } | |
4450 | ||
4451 | case SD_BUS_TYPE_ARRAY: { | |
4452 | size_t k; | |
4453 | ||
4454 | r = signature_element_length(t + 1, &k); | |
4455 | if (r < 0) | |
4456 | return r; | |
4457 | ||
4458 | { | |
4459 | char s[k + 1]; | |
4460 | memcpy(s, t + 1, k); | |
4461 | s[k] = 0; | |
4462 | ||
4463 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s); | |
4464 | if (r < 0) | |
4465 | return r; | |
4466 | if (r == 0) { | |
4467 | if (n_loop <= 1) | |
4468 | return 0; | |
4469 | ||
4470 | return -ENXIO; | |
4471 | } | |
4472 | } | |
4473 | ||
4474 | if (n_array == (unsigned) -1) { | |
4475 | types += k; | |
4476 | n_struct -= k; | |
4477 | } | |
4478 | ||
4479 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); | |
4480 | if (r < 0) | |
4481 | return r; | |
4482 | ||
4483 | types = t + 1; | |
4484 | n_struct = k; | |
4485 | n_array = va_arg(ap, unsigned); | |
4486 | ||
4487 | break; | |
4488 | } | |
4489 | ||
4490 | case SD_BUS_TYPE_VARIANT: { | |
4491 | const char *s; | |
4492 | ||
4493 | s = va_arg(ap, const char *); | |
4494 | if (!s) | |
4495 | return -EINVAL; | |
4496 | ||
4497 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, s); | |
4498 | if (r < 0) | |
4499 | return r; | |
4500 | if (r == 0) { | |
4501 | if (n_loop <= 1) | |
4502 | return 0; | |
4503 | ||
4504 | return -ENXIO; | |
4505 | } | |
4506 | ||
4507 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); | |
4508 | if (r < 0) | |
4509 | return r; | |
4510 | ||
4511 | types = s; | |
4512 | n_struct = strlen(s); | |
4513 | n_array = (unsigned) -1; | |
4514 | ||
4515 | break; | |
4516 | } | |
4517 | ||
4518 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
4519 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
4520 | size_t k; | |
4521 | ||
4522 | r = signature_element_length(t, &k); | |
4523 | if (r < 0) | |
4524 | return r; | |
4525 | ||
4526 | { | |
4527 | char s[k - 1]; | |
4528 | memcpy(s, t + 1, k - 2); | |
4529 | s[k - 2] = 0; | |
4530 | ||
4531 | r = sd_bus_message_enter_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
4532 | if (r < 0) | |
4533 | return r; | |
4534 | if (r == 0) { | |
4535 | if (n_loop <= 1) | |
4536 | return 0; | |
4537 | return -ENXIO; | |
4538 | } | |
4539 | } | |
4540 | ||
4541 | if (n_array == (unsigned) -1) { | |
4542 | types += k - 1; | |
4543 | n_struct -= k - 1; | |
4544 | } | |
4545 | ||
4546 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); | |
4547 | if (r < 0) | |
4548 | return r; | |
4549 | ||
4550 | types = t + 1; | |
4551 | n_struct = k - 2; | |
4552 | n_array = (unsigned) -1; | |
4553 | ||
4554 | break; | |
4555 | } | |
4556 | ||
4557 | default: | |
4558 | return -EINVAL; | |
4559 | } | |
4560 | } | |
4561 | ||
4562 | return 1; | |
4563 | } | |
4564 | ||
4565 | _public_ int sd_bus_message_read(sd_bus_message *m, const char *types, ...) { | |
4566 | va_list ap; | |
4567 | int r; | |
4568 | ||
4569 | assert_return(m, -EINVAL); | |
4570 | assert_return(m->sealed, -EPERM); | |
4571 | assert_return(types, -EINVAL); | |
4572 | ||
4573 | va_start(ap, types); | |
4574 | r = message_read_ap(m, types, ap); | |
4575 | va_end(ap); | |
4576 | ||
4577 | return r; | |
4578 | } | |
4579 | ||
4580 | _public_ int sd_bus_message_skip(sd_bus_message *m, const char *types) { | |
4581 | int r; | |
4582 | ||
4583 | assert_return(m, -EINVAL); | |
4584 | assert_return(m->sealed, -EPERM); | |
60f067b4 | 4585 | |
f47781d8 MP |
4586 | /* If types is NULL, read exactly one element */ |
4587 | if (!types) { | |
4588 | struct bus_container *c; | |
4589 | size_t l; | |
4590 | ||
4591 | if (message_end_of_signature(m)) | |
4592 | return -ENXIO; | |
4593 | ||
4594 | if (message_end_of_array(m, m->rindex)) | |
4595 | return 0; | |
4596 | ||
4597 | c = message_get_container(m); | |
4598 | ||
4599 | r = signature_element_length(c->signature + c->index, &l); | |
4600 | if (r < 0) | |
4601 | return r; | |
4602 | ||
4603 | types = strndupa(c->signature + c->index, l); | |
4604 | } | |
60f067b4 JS |
4605 | |
4606 | switch (*types) { | |
4607 | ||
f47781d8 MP |
4608 | case 0: /* Nothing to drop */ |
4609 | return 0; | |
4610 | ||
60f067b4 JS |
4611 | case SD_BUS_TYPE_BYTE: |
4612 | case SD_BUS_TYPE_BOOLEAN: | |
4613 | case SD_BUS_TYPE_INT16: | |
4614 | case SD_BUS_TYPE_UINT16: | |
4615 | case SD_BUS_TYPE_INT32: | |
4616 | case SD_BUS_TYPE_UINT32: | |
4617 | case SD_BUS_TYPE_INT64: | |
4618 | case SD_BUS_TYPE_UINT64: | |
4619 | case SD_BUS_TYPE_DOUBLE: | |
4620 | case SD_BUS_TYPE_STRING: | |
4621 | case SD_BUS_TYPE_OBJECT_PATH: | |
4622 | case SD_BUS_TYPE_SIGNATURE: | |
4623 | case SD_BUS_TYPE_UNIX_FD: | |
4624 | ||
4625 | r = sd_bus_message_read_basic(m, *types, NULL); | |
4626 | if (r <= 0) | |
4627 | return r; | |
4628 | ||
4629 | r = sd_bus_message_skip(m, types + 1); | |
4630 | if (r < 0) | |
4631 | return r; | |
4632 | ||
4633 | return 1; | |
4634 | ||
4635 | case SD_BUS_TYPE_ARRAY: { | |
4636 | size_t k; | |
4637 | ||
4638 | r = signature_element_length(types + 1, &k); | |
4639 | if (r < 0) | |
4640 | return r; | |
4641 | ||
4642 | { | |
4643 | char s[k+1]; | |
4644 | memcpy(s, types+1, k); | |
4645 | s[k] = 0; | |
4646 | ||
4647 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s); | |
4648 | if (r <= 0) | |
4649 | return r; | |
4650 | ||
4651 | for (;;) { | |
4652 | r = sd_bus_message_skip(m, s); | |
4653 | if (r < 0) | |
4654 | return r; | |
4655 | if (r == 0) | |
4656 | break; | |
4657 | } | |
4658 | ||
4659 | r = sd_bus_message_exit_container(m); | |
4660 | if (r < 0) | |
4661 | return r; | |
4662 | } | |
4663 | ||
4664 | r = sd_bus_message_skip(m, types + 1 + k); | |
4665 | if (r < 0) | |
4666 | return r; | |
4667 | ||
4668 | return 1; | |
4669 | } | |
4670 | ||
4671 | case SD_BUS_TYPE_VARIANT: { | |
4672 | const char *contents; | |
4673 | char x; | |
4674 | ||
4675 | r = sd_bus_message_peek_type(m, &x, &contents); | |
4676 | if (r <= 0) | |
4677 | return r; | |
4678 | ||
4679 | if (x != SD_BUS_TYPE_VARIANT) | |
4680 | return -ENXIO; | |
4681 | ||
4682 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents); | |
4683 | if (r <= 0) | |
4684 | return r; | |
4685 | ||
4686 | r = sd_bus_message_skip(m, contents); | |
4687 | if (r < 0) | |
4688 | return r; | |
4689 | assert(r != 0); | |
4690 | ||
4691 | r = sd_bus_message_exit_container(m); | |
4692 | if (r < 0) | |
4693 | return r; | |
4694 | ||
4695 | r = sd_bus_message_skip(m, types + 1); | |
4696 | if (r < 0) | |
4697 | return r; | |
4698 | ||
4699 | return 1; | |
4700 | } | |
4701 | ||
4702 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
4703 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
4704 | size_t k; | |
4705 | ||
4706 | r = signature_element_length(types, &k); | |
4707 | if (r < 0) | |
4708 | return r; | |
4709 | ||
4710 | { | |
4711 | char s[k-1]; | |
4712 | memcpy(s, types+1, k-2); | |
4713 | s[k-2] = 0; | |
4714 | ||
4715 | r = sd_bus_message_enter_container(m, *types == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
4716 | if (r <= 0) | |
4717 | return r; | |
4718 | ||
4719 | r = sd_bus_message_skip(m, s); | |
4720 | if (r < 0) | |
4721 | return r; | |
60f067b4 JS |
4722 | |
4723 | r = sd_bus_message_exit_container(m); | |
4724 | if (r < 0) | |
4725 | return r; | |
4726 | } | |
4727 | ||
4728 | r = sd_bus_message_skip(m, types + k); | |
4729 | if (r < 0) | |
4730 | return r; | |
4731 | ||
4732 | return 1; | |
4733 | } | |
4734 | ||
4735 | default: | |
4736 | return -EINVAL; | |
4737 | } | |
4738 | } | |
4739 | ||
e735f4d4 MP |
4740 | _public_ int sd_bus_message_read_array( |
4741 | sd_bus_message *m, | |
4742 | char type, | |
4743 | const void **ptr, | |
4744 | size_t *size) { | |
4745 | ||
60f067b4 JS |
4746 | struct bus_container *c; |
4747 | void *p; | |
4748 | size_t sz; | |
4749 | ssize_t align; | |
4750 | int r; | |
4751 | ||
4752 | assert_return(m, -EINVAL); | |
4753 | assert_return(m->sealed, -EPERM); | |
4754 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
4755 | assert_return(ptr, -EINVAL); | |
4756 | assert_return(size, -EINVAL); | |
e3bff60a | 4757 | assert_return(!BUS_MESSAGE_NEED_BSWAP(m), -EOPNOTSUPP); |
60f067b4 JS |
4758 | |
4759 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
4760 | if (r <= 0) | |
4761 | return r; | |
4762 | ||
4763 | c = message_get_container(m); | |
4764 | ||
4765 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
4766 | align = bus_gvariant_get_alignment(CHAR_TO_STR(type)); | |
4767 | if (align < 0) | |
4768 | return align; | |
4769 | ||
4770 | sz = c->end - c->begin; | |
4771 | } else { | |
4772 | align = bus_type_get_alignment(type); | |
4773 | if (align < 0) | |
4774 | return align; | |
4775 | ||
4776 | sz = BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
4777 | } | |
4778 | ||
4779 | if (sz == 0) | |
4780 | /* Zero length array, let's return some aligned | |
4781 | * pointer that is not NULL */ | |
4782 | p = (uint8_t*) NULL + align; | |
4783 | else { | |
4784 | r = message_peek_body(m, &m->rindex, align, sz, &p); | |
4785 | if (r < 0) | |
4786 | goto fail; | |
4787 | } | |
4788 | ||
4789 | r = sd_bus_message_exit_container(m); | |
4790 | if (r < 0) | |
4791 | goto fail; | |
4792 | ||
4793 | *ptr = (const void*) p; | |
4794 | *size = sz; | |
4795 | ||
4796 | return 1; | |
4797 | ||
4798 | fail: | |
4799 | message_quit_container(m); | |
4800 | return r; | |
4801 | } | |
4802 | ||
4803 | static int message_peek_fields( | |
4804 | sd_bus_message *m, | |
4805 | size_t *rindex, | |
4806 | size_t align, | |
4807 | size_t nbytes, | |
4808 | void **ret) { | |
4809 | ||
4810 | assert(m); | |
4811 | assert(rindex); | |
4812 | assert(align > 0); | |
4813 | ||
e735f4d4 | 4814 | return buffer_peek(BUS_MESSAGE_FIELDS(m), m->fields_size, rindex, align, nbytes, ret); |
60f067b4 JS |
4815 | } |
4816 | ||
4817 | static int message_peek_field_uint32( | |
4818 | sd_bus_message *m, | |
4819 | size_t *ri, | |
4820 | size_t item_size, | |
4821 | uint32_t *ret) { | |
4822 | ||
4823 | int r; | |
4824 | void *q; | |
4825 | ||
4826 | assert(m); | |
4827 | assert(ri); | |
4828 | ||
4829 | if (BUS_MESSAGE_IS_GVARIANT(m) && item_size != 4) | |
4830 | return -EBADMSG; | |
4831 | ||
4832 | /* identical for gvariant and dbus1 */ | |
4833 | ||
4834 | r = message_peek_fields(m, ri, 4, 4, &q); | |
4835 | if (r < 0) | |
4836 | return r; | |
4837 | ||
4838 | if (ret) | |
4839 | *ret = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
4840 | ||
4841 | return 0; | |
4842 | } | |
4843 | ||
e735f4d4 MP |
4844 | static int message_peek_field_uint64( |
4845 | sd_bus_message *m, | |
4846 | size_t *ri, | |
4847 | size_t item_size, | |
4848 | uint64_t *ret) { | |
4849 | ||
4850 | int r; | |
4851 | void *q; | |
4852 | ||
4853 | assert(m); | |
4854 | assert(ri); | |
4855 | ||
4856 | if (BUS_MESSAGE_IS_GVARIANT(m) && item_size != 8) | |
4857 | return -EBADMSG; | |
4858 | ||
4859 | /* identical for gvariant and dbus1 */ | |
4860 | ||
4861 | r = message_peek_fields(m, ri, 8, 8, &q); | |
4862 | if (r < 0) | |
4863 | return r; | |
4864 | ||
4865 | if (ret) | |
4866 | *ret = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q); | |
4867 | ||
4868 | return 0; | |
4869 | } | |
4870 | ||
60f067b4 JS |
4871 | static int message_peek_field_string( |
4872 | sd_bus_message *m, | |
4873 | bool (*validate)(const char *p), | |
4874 | size_t *ri, | |
4875 | size_t item_size, | |
4876 | const char **ret) { | |
4877 | ||
4878 | uint32_t l; | |
4879 | int r; | |
4880 | void *q; | |
4881 | ||
4882 | assert(m); | |
4883 | assert(ri); | |
4884 | ||
4885 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
4886 | ||
4887 | if (item_size <= 0) | |
4888 | return -EBADMSG; | |
4889 | ||
4890 | r = message_peek_fields(m, ri, 1, item_size, &q); | |
4891 | if (r < 0) | |
4892 | return r; | |
4893 | ||
4894 | l = item_size - 1; | |
4895 | } else { | |
4896 | r = message_peek_field_uint32(m, ri, 4, &l); | |
4897 | if (r < 0) | |
4898 | return r; | |
4899 | ||
4900 | r = message_peek_fields(m, ri, 1, l+1, &q); | |
4901 | if (r < 0) | |
4902 | return r; | |
4903 | } | |
4904 | ||
4905 | if (validate) { | |
4906 | if (!validate_nul(q, l)) | |
4907 | return -EBADMSG; | |
4908 | ||
4909 | if (!validate(q)) | |
4910 | return -EBADMSG; | |
4911 | } else { | |
4912 | if (!validate_string(q, l)) | |
4913 | return -EBADMSG; | |
4914 | } | |
4915 | ||
4916 | if (ret) | |
4917 | *ret = q; | |
4918 | ||
4919 | return 0; | |
4920 | } | |
4921 | ||
4922 | static int message_peek_field_signature( | |
4923 | sd_bus_message *m, | |
4924 | size_t *ri, | |
4925 | size_t item_size, | |
4926 | const char **ret) { | |
4927 | ||
4928 | size_t l; | |
4929 | int r; | |
4930 | void *q; | |
4931 | ||
4932 | assert(m); | |
4933 | assert(ri); | |
4934 | ||
4935 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
4936 | ||
4937 | if (item_size <= 0) | |
4938 | return -EBADMSG; | |
4939 | ||
4940 | r = message_peek_fields(m, ri, 1, item_size, &q); | |
4941 | if (r < 0) | |
4942 | return r; | |
4943 | ||
4944 | l = item_size - 1; | |
4945 | } else { | |
4946 | r = message_peek_fields(m, ri, 1, 1, &q); | |
4947 | if (r < 0) | |
4948 | return r; | |
4949 | ||
4950 | l = *(uint8_t*) q; | |
4951 | r = message_peek_fields(m, ri, 1, l+1, &q); | |
4952 | if (r < 0) | |
4953 | return r; | |
4954 | } | |
4955 | ||
4956 | if (!validate_signature(q, l)) | |
4957 | return -EBADMSG; | |
4958 | ||
4959 | if (ret) | |
4960 | *ret = q; | |
4961 | ||
4962 | return 0; | |
4963 | } | |
4964 | ||
4965 | static int message_skip_fields( | |
4966 | sd_bus_message *m, | |
4967 | size_t *ri, | |
4968 | uint32_t array_size, | |
4969 | const char **signature) { | |
4970 | ||
4971 | size_t original_index; | |
4972 | int r; | |
4973 | ||
4974 | assert(m); | |
4975 | assert(ri); | |
4976 | assert(signature); | |
4977 | assert(!BUS_MESSAGE_IS_GVARIANT(m)); | |
4978 | ||
4979 | original_index = *ri; | |
4980 | ||
4981 | for (;;) { | |
4982 | char t; | |
4983 | size_t l; | |
4984 | ||
4985 | if (array_size != (uint32_t) -1 && | |
4986 | array_size <= *ri - original_index) | |
4987 | return 0; | |
4988 | ||
4989 | t = **signature; | |
4990 | if (!t) | |
4991 | return 0; | |
4992 | ||
4993 | if (t == SD_BUS_TYPE_STRING) { | |
4994 | ||
4995 | r = message_peek_field_string(m, NULL, ri, 0, NULL); | |
4996 | if (r < 0) | |
4997 | return r; | |
4998 | ||
4999 | (*signature)++; | |
5000 | ||
5001 | } else if (t == SD_BUS_TYPE_OBJECT_PATH) { | |
5002 | ||
5003 | r = message_peek_field_string(m, object_path_is_valid, ri, 0, NULL); | |
5004 | if (r < 0) | |
5005 | return r; | |
5006 | ||
5007 | (*signature)++; | |
5008 | ||
5009 | } else if (t == SD_BUS_TYPE_SIGNATURE) { | |
5010 | ||
5011 | r = message_peek_field_signature(m, ri, 0, NULL); | |
5012 | if (r < 0) | |
5013 | return r; | |
5014 | ||
5015 | (*signature)++; | |
5016 | ||
5017 | } else if (bus_type_is_basic(t)) { | |
5018 | ssize_t align, k; | |
5019 | ||
5020 | align = bus_type_get_alignment(t); | |
5021 | k = bus_type_get_size(t); | |
5022 | assert(align > 0 && k > 0); | |
5023 | ||
5024 | r = message_peek_fields(m, ri, align, k, NULL); | |
5025 | if (r < 0) | |
5026 | return r; | |
5027 | ||
5028 | (*signature)++; | |
5029 | ||
5030 | } else if (t == SD_BUS_TYPE_ARRAY) { | |
5031 | ||
5032 | r = signature_element_length(*signature+1, &l); | |
5033 | if (r < 0) | |
5034 | return r; | |
5035 | ||
5036 | assert(l >= 1); | |
5037 | { | |
5038 | char sig[l-1], *s; | |
5039 | uint32_t nas; | |
5040 | int alignment; | |
5041 | ||
5042 | strncpy(sig, *signature + 1, l-1); | |
5043 | s = sig; | |
5044 | ||
5045 | alignment = bus_type_get_alignment(sig[0]); | |
5046 | if (alignment < 0) | |
5047 | return alignment; | |
5048 | ||
5049 | r = message_peek_field_uint32(m, ri, 0, &nas); | |
5050 | if (r < 0) | |
5051 | return r; | |
5052 | if (nas > BUS_ARRAY_MAX_SIZE) | |
5053 | return -EBADMSG; | |
5054 | ||
5055 | r = message_peek_fields(m, ri, alignment, 0, NULL); | |
5056 | if (r < 0) | |
5057 | return r; | |
5058 | ||
5059 | r = message_skip_fields(m, ri, nas, (const char**) &s); | |
5060 | if (r < 0) | |
5061 | return r; | |
5062 | } | |
5063 | ||
5064 | (*signature) += 1 + l; | |
5065 | ||
5066 | } else if (t == SD_BUS_TYPE_VARIANT) { | |
5067 | const char *s; | |
5068 | ||
5069 | r = message_peek_field_signature(m, ri, 0, &s); | |
5070 | if (r < 0) | |
5071 | return r; | |
5072 | ||
5073 | r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s); | |
5074 | if (r < 0) | |
5075 | return r; | |
5076 | ||
5077 | (*signature)++; | |
5078 | ||
f5e65279 | 5079 | } else if (IN_SET(t, SD_BUS_TYPE_STRUCT, SD_BUS_TYPE_DICT_ENTRY)) { |
60f067b4 JS |
5080 | |
5081 | r = signature_element_length(*signature, &l); | |
5082 | if (r < 0) | |
5083 | return r; | |
5084 | ||
5085 | assert(l >= 2); | |
5086 | { | |
5087 | char sig[l-1], *s; | |
5088 | strncpy(sig, *signature + 1, l-1); | |
5089 | s = sig; | |
5090 | ||
5091 | r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s); | |
5092 | if (r < 0) | |
5093 | return r; | |
5094 | } | |
5095 | ||
5096 | *signature += l; | |
5097 | } else | |
5098 | return -EINVAL; | |
5099 | } | |
5100 | } | |
5101 | ||
5102 | int bus_message_parse_fields(sd_bus_message *m) { | |
5103 | size_t ri; | |
5104 | int r; | |
5105 | uint32_t unix_fds = 0; | |
5106 | bool unix_fds_set = false; | |
5107 | void *offsets = NULL; | |
5108 | unsigned n_offsets = 0; | |
5109 | size_t sz = 0; | |
5110 | unsigned i = 0; | |
5111 | ||
5112 | assert(m); | |
5113 | ||
5114 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
e735f4d4 MP |
5115 | char *p; |
5116 | ||
5117 | /* Read the signature from the end of the body variant first */ | |
5118 | sz = bus_gvariant_determine_word_size(BUS_MESSAGE_SIZE(m), 0); | |
5119 | if (m->footer_accessible < 1 + sz) | |
5120 | return -EBADMSG; | |
5121 | ||
5122 | p = (char*) m->footer + m->footer_accessible - (1 + sz); | |
5123 | for (;;) { | |
5124 | if (p < (char*) m->footer) | |
5125 | return -EBADMSG; | |
5126 | ||
5127 | if (*p == 0) { | |
5fd56512 | 5128 | size_t l; |
e735f4d4 | 5129 | char *c; |
60f067b4 | 5130 | |
5fd56512 MP |
5131 | /* We found the beginning of the signature |
5132 | * string, yay! We require the body to be a | |
5133 | * structure, so verify it and then strip the | |
5134 | * opening/closing brackets. */ | |
5135 | ||
5136 | l = ((char*) m->footer + m->footer_accessible) - p - (1 + sz); | |
5137 | if (l < 2 || | |
5138 | p[1] != SD_BUS_TYPE_STRUCT_BEGIN || | |
5139 | p[1 + l - 1] != SD_BUS_TYPE_STRUCT_END) | |
5140 | return -EBADMSG; | |
e735f4d4 | 5141 | |
5fd56512 | 5142 | c = strndup(p + 1 + 1, l - 2); |
e735f4d4 MP |
5143 | if (!c) |
5144 | return -ENOMEM; | |
5145 | ||
5146 | free(m->root_container.signature); | |
5147 | m->root_container.signature = c; | |
5148 | break; | |
5149 | } | |
5150 | ||
5151 | p--; | |
5152 | } | |
5153 | ||
5154 | /* Calculate the actual user body size, by removing | |
5155 | * the trailing variant signature and struct offset | |
5156 | * table */ | |
5157 | m->user_body_size = m->body_size - ((char*) m->footer + m->footer_accessible - p); | |
5158 | ||
5159 | /* Pull out the offset table for the fields array */ | |
5160 | sz = bus_gvariant_determine_word_size(m->fields_size, 0); | |
60f067b4 JS |
5161 | if (sz > 0) { |
5162 | size_t framing; | |
e735f4d4 | 5163 | void *q; |
60f067b4 | 5164 | |
e735f4d4 | 5165 | ri = m->fields_size - sz; |
60f067b4 JS |
5166 | r = message_peek_fields(m, &ri, 1, sz, &q); |
5167 | if (r < 0) | |
5168 | return r; | |
5169 | ||
e735f4d4 MP |
5170 | framing = bus_gvariant_read_word_le(q, sz); |
5171 | if (framing >= m->fields_size - sz) | |
60f067b4 | 5172 | return -EBADMSG; |
e735f4d4 | 5173 | if ((m->fields_size - framing) % sz != 0) |
60f067b4 JS |
5174 | return -EBADMSG; |
5175 | ||
5176 | ri = framing; | |
e735f4d4 | 5177 | r = message_peek_fields(m, &ri, 1, m->fields_size - framing, &offsets); |
60f067b4 JS |
5178 | if (r < 0) |
5179 | return r; | |
5180 | ||
e735f4d4 | 5181 | n_offsets = (m->fields_size - framing) / sz; |
60f067b4 | 5182 | } |
e735f4d4 MP |
5183 | } else |
5184 | m->user_body_size = m->body_size; | |
60f067b4 JS |
5185 | |
5186 | ri = 0; | |
e735f4d4 | 5187 | while (ri < m->fields_size) { |
60f067b4 JS |
5188 | _cleanup_free_ char *sig = NULL; |
5189 | const char *signature; | |
e735f4d4 | 5190 | uint64_t field_type; |
60f067b4 JS |
5191 | size_t item_size = (size_t) -1; |
5192 | ||
5193 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
e735f4d4 MP |
5194 | uint64_t *u64; |
5195 | ||
60f067b4 JS |
5196 | if (i >= n_offsets) |
5197 | break; | |
5198 | ||
5199 | if (i == 0) | |
5200 | ri = 0; | |
5201 | else | |
e735f4d4 | 5202 | ri = ALIGN_TO(bus_gvariant_read_word_le((uint8_t*) offsets + (i-1)*sz, sz), 8); |
60f067b4 | 5203 | |
e735f4d4 MP |
5204 | r = message_peek_fields(m, &ri, 8, 8, (void**) &u64); |
5205 | if (r < 0) | |
5206 | return r; | |
5207 | ||
5208 | field_type = BUS_MESSAGE_BSWAP64(m, *u64); | |
5209 | } else { | |
5210 | uint8_t *u8; | |
5211 | ||
5212 | r = message_peek_fields(m, &ri, 8, 1, (void**) &u8); | |
5213 | if (r < 0) | |
5214 | return r; | |
5215 | ||
5216 | field_type = *u8; | |
5217 | } | |
60f067b4 JS |
5218 | |
5219 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
5220 | size_t where, end; | |
5221 | char *b; | |
5222 | void *q; | |
5223 | ||
e735f4d4 | 5224 | end = bus_gvariant_read_word_le((uint8_t*) offsets + i*sz, sz); |
60f067b4 JS |
5225 | |
5226 | if (end < ri) | |
5227 | return -EBADMSG; | |
5228 | ||
5229 | where = ri = ALIGN_TO(ri, 8); | |
5230 | item_size = end - ri; | |
5231 | r = message_peek_fields(m, &where, 1, item_size, &q); | |
5232 | if (r < 0) | |
5233 | return r; | |
5234 | ||
5235 | b = memrchr(q, 0, item_size); | |
5236 | if (!b) | |
5237 | return -EBADMSG; | |
5238 | ||
5239 | sig = strndup(b+1, item_size - (b+1-(char*) q)); | |
5240 | if (!sig) | |
5241 | return -ENOMEM; | |
5242 | ||
5243 | signature = sig; | |
5244 | item_size = b - (char*) q; | |
5245 | } else { | |
5246 | r = message_peek_field_signature(m, &ri, 0, &signature); | |
5247 | if (r < 0) | |
5248 | return r; | |
5249 | } | |
5250 | ||
e735f4d4 MP |
5251 | switch (field_type) { |
5252 | ||
60f067b4 JS |
5253 | case _BUS_MESSAGE_HEADER_INVALID: |
5254 | return -EBADMSG; | |
5255 | ||
5256 | case BUS_MESSAGE_HEADER_PATH: | |
5257 | ||
5258 | if (m->path) | |
5259 | return -EBADMSG; | |
5260 | ||
5261 | if (!streq(signature, "o")) | |
5262 | return -EBADMSG; | |
5263 | ||
5264 | r = message_peek_field_string(m, object_path_is_valid, &ri, item_size, &m->path); | |
5265 | break; | |
5266 | ||
5267 | case BUS_MESSAGE_HEADER_INTERFACE: | |
5268 | ||
5269 | if (m->interface) | |
5270 | return -EBADMSG; | |
5271 | ||
5272 | if (!streq(signature, "s")) | |
5273 | return -EBADMSG; | |
5274 | ||
5275 | r = message_peek_field_string(m, interface_name_is_valid, &ri, item_size, &m->interface); | |
5276 | break; | |
5277 | ||
5278 | case BUS_MESSAGE_HEADER_MEMBER: | |
5279 | ||
5280 | if (m->member) | |
5281 | return -EBADMSG; | |
5282 | ||
5283 | if (!streq(signature, "s")) | |
5284 | return -EBADMSG; | |
5285 | ||
5286 | r = message_peek_field_string(m, member_name_is_valid, &ri, item_size, &m->member); | |
5287 | break; | |
5288 | ||
5289 | case BUS_MESSAGE_HEADER_ERROR_NAME: | |
5290 | ||
5291 | if (m->error.name) | |
5292 | return -EBADMSG; | |
5293 | ||
5294 | if (!streq(signature, "s")) | |
5295 | return -EBADMSG; | |
5296 | ||
5297 | r = message_peek_field_string(m, error_name_is_valid, &ri, item_size, &m->error.name); | |
5298 | if (r >= 0) | |
5299 | m->error._need_free = -1; | |
5300 | ||
5301 | break; | |
5302 | ||
5303 | case BUS_MESSAGE_HEADER_DESTINATION: | |
5304 | ||
5305 | if (m->destination) | |
5306 | return -EBADMSG; | |
5307 | ||
5308 | if (!streq(signature, "s")) | |
5309 | return -EBADMSG; | |
5310 | ||
5311 | r = message_peek_field_string(m, service_name_is_valid, &ri, item_size, &m->destination); | |
5312 | break; | |
5313 | ||
5314 | case BUS_MESSAGE_HEADER_SENDER: | |
5315 | ||
5316 | if (m->sender) | |
5317 | return -EBADMSG; | |
5318 | ||
5319 | if (!streq(signature, "s")) | |
5320 | return -EBADMSG; | |
5321 | ||
5322 | r = message_peek_field_string(m, service_name_is_valid, &ri, item_size, &m->sender); | |
5323 | ||
f5e65279 | 5324 | if (r >= 0 && m->sender[0] == ':' && m->bus->bus_client) { |
60f067b4 JS |
5325 | m->creds.unique_name = (char*) m->sender; |
5326 | m->creds.mask |= SD_BUS_CREDS_UNIQUE_NAME & m->bus->creds_mask; | |
5327 | } | |
5328 | ||
5329 | break; | |
5330 | ||
5331 | ||
5332 | case BUS_MESSAGE_HEADER_SIGNATURE: { | |
5333 | const char *s; | |
5334 | char *c; | |
5335 | ||
e735f4d4 MP |
5336 | if (BUS_MESSAGE_IS_GVARIANT(m)) /* only applies to dbus1 */ |
5337 | return -EBADMSG; | |
5338 | ||
60f067b4 JS |
5339 | if (m->root_container.signature) |
5340 | return -EBADMSG; | |
5341 | ||
5342 | if (!streq(signature, "g")) | |
5343 | return -EBADMSG; | |
5344 | ||
5345 | r = message_peek_field_signature(m, &ri, item_size, &s); | |
5346 | if (r < 0) | |
5347 | return r; | |
5348 | ||
5349 | c = strdup(s); | |
5350 | if (!c) | |
5351 | return -ENOMEM; | |
5352 | ||
5353 | free(m->root_container.signature); | |
5354 | m->root_container.signature = c; | |
5355 | break; | |
5356 | } | |
5357 | ||
e735f4d4 | 5358 | case BUS_MESSAGE_HEADER_REPLY_SERIAL: |
60f067b4 JS |
5359 | |
5360 | if (m->reply_cookie != 0) | |
5361 | return -EBADMSG; | |
5362 | ||
e735f4d4 MP |
5363 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
5364 | /* 64bit on dbus2 */ | |
60f067b4 | 5365 | |
e735f4d4 MP |
5366 | if (!streq(signature, "t")) |
5367 | return -EBADMSG; | |
5368 | ||
5369 | r = message_peek_field_uint64(m, &ri, item_size, &m->reply_cookie); | |
5370 | if (r < 0) | |
5371 | return r; | |
5372 | } else { | |
5373 | /* 32bit on dbus1 */ | |
5374 | uint32_t serial; | |
60f067b4 | 5375 | |
e735f4d4 MP |
5376 | if (!streq(signature, "u")) |
5377 | return -EBADMSG; | |
5378 | ||
5379 | r = message_peek_field_uint32(m, &ri, item_size, &serial); | |
5380 | if (r < 0) | |
5381 | return r; | |
5382 | ||
5383 | m->reply_cookie = serial; | |
5384 | } | |
60f067b4 JS |
5385 | |
5386 | if (m->reply_cookie == 0) | |
5387 | return -EBADMSG; | |
5388 | ||
5389 | break; | |
60f067b4 JS |
5390 | |
5391 | case BUS_MESSAGE_HEADER_UNIX_FDS: | |
5392 | if (unix_fds_set) | |
5393 | return -EBADMSG; | |
5394 | ||
5395 | if (!streq(signature, "u")) | |
5396 | return -EBADMSG; | |
5397 | ||
5398 | r = message_peek_field_uint32(m, &ri, item_size, &unix_fds); | |
5399 | if (r < 0) | |
5400 | return -EBADMSG; | |
5401 | ||
5402 | unix_fds_set = true; | |
5403 | break; | |
5404 | ||
5405 | default: | |
5406 | if (!BUS_MESSAGE_IS_GVARIANT(m)) | |
5407 | r = message_skip_fields(m, &ri, (uint32_t) -1, (const char **) &signature); | |
5408 | } | |
5409 | ||
5410 | if (r < 0) | |
5411 | return r; | |
5412 | ||
5413 | i++; | |
5414 | } | |
5415 | ||
5416 | if (m->n_fds != unix_fds) | |
5417 | return -EBADMSG; | |
5418 | ||
5419 | switch (m->header->type) { | |
5420 | ||
5421 | case SD_BUS_MESSAGE_SIGNAL: | |
5422 | if (!m->path || !m->interface || !m->member) | |
5423 | return -EBADMSG; | |
f47781d8 MP |
5424 | |
5425 | if (m->reply_cookie != 0) | |
5426 | return -EBADMSG; | |
5427 | ||
60f067b4 JS |
5428 | break; |
5429 | ||
5430 | case SD_BUS_MESSAGE_METHOD_CALL: | |
5431 | ||
5432 | if (!m->path || !m->member) | |
5433 | return -EBADMSG; | |
5434 | ||
f47781d8 MP |
5435 | if (m->reply_cookie != 0) |
5436 | return -EBADMSG; | |
5437 | ||
60f067b4 JS |
5438 | break; |
5439 | ||
5440 | case SD_BUS_MESSAGE_METHOD_RETURN: | |
5441 | ||
5442 | if (m->reply_cookie == 0) | |
5443 | return -EBADMSG; | |
5444 | break; | |
5445 | ||
5446 | case SD_BUS_MESSAGE_METHOD_ERROR: | |
5447 | ||
5448 | if (m->reply_cookie == 0 || !m->error.name) | |
5449 | return -EBADMSG; | |
5450 | break; | |
5451 | } | |
5452 | ||
5453 | /* Refuse non-local messages that claim they are local */ | |
5454 | if (streq_ptr(m->path, "/org/freedesktop/DBus/Local")) | |
5455 | return -EBADMSG; | |
5456 | if (streq_ptr(m->interface, "org.freedesktop.DBus.Local")) | |
5457 | return -EBADMSG; | |
5458 | if (streq_ptr(m->sender, "org.freedesktop.DBus.Local")) | |
5459 | return -EBADMSG; | |
5460 | ||
e735f4d4 | 5461 | m->root_container.end = m->user_body_size; |
60f067b4 JS |
5462 | |
5463 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
5464 | r = build_struct_offsets( | |
5465 | m, | |
5466 | m->root_container.signature, | |
e735f4d4 | 5467 | m->user_body_size, |
60f067b4 JS |
5468 | &m->root_container.item_size, |
5469 | &m->root_container.offsets, | |
5470 | &m->root_container.n_offsets); | |
5471 | if (r < 0) | |
5472 | return r; | |
5473 | } | |
5474 | ||
5475 | /* Try to read the error message, but if we can't it's a non-issue */ | |
5476 | if (m->header->type == SD_BUS_MESSAGE_METHOD_ERROR) | |
e3bff60a | 5477 | (void) sd_bus_message_read(m, "s", &m->error.message); |
60f067b4 JS |
5478 | |
5479 | return 0; | |
5480 | } | |
5481 | ||
5482 | _public_ int sd_bus_message_set_destination(sd_bus_message *m, const char *destination) { | |
5483 | assert_return(m, -EINVAL); | |
5484 | assert_return(destination, -EINVAL); | |
5485 | assert_return(!m->sealed, -EPERM); | |
5486 | assert_return(!m->destination, -EEXIST); | |
5487 | ||
5488 | return message_append_field_string(m, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &m->destination); | |
5489 | } | |
5490 | ||
5491 | int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz) { | |
5492 | size_t total; | |
5493 | void *p, *e; | |
5494 | unsigned i; | |
5495 | struct bus_body_part *part; | |
5496 | ||
5497 | assert(m); | |
5498 | assert(buffer); | |
5499 | assert(sz); | |
5500 | ||
5501 | total = BUS_MESSAGE_SIZE(m); | |
5502 | ||
5503 | p = malloc(total); | |
5504 | if (!p) | |
5505 | return -ENOMEM; | |
5506 | ||
5507 | e = mempcpy(p, m->header, BUS_MESSAGE_BODY_BEGIN(m)); | |
5508 | MESSAGE_FOREACH_PART(part, i, m) | |
5509 | e = mempcpy(e, part->data, part->size); | |
5510 | ||
5511 | assert(total == (size_t) ((uint8_t*) e - (uint8_t*) p)); | |
5512 | ||
5513 | *buffer = p; | |
5514 | *sz = total; | |
5515 | ||
5516 | return 0; | |
5517 | } | |
5518 | ||
5519 | int bus_message_read_strv_extend(sd_bus_message *m, char ***l) { | |
e3bff60a | 5520 | const char *s; |
60f067b4 JS |
5521 | int r; |
5522 | ||
5523 | assert(m); | |
5524 | assert(l); | |
5525 | ||
5526 | r = sd_bus_message_enter_container(m, 'a', "s"); | |
5527 | if (r <= 0) | |
5528 | return r; | |
5529 | ||
e3bff60a | 5530 | while ((r = sd_bus_message_read_basic(m, 's', &s)) > 0) { |
60f067b4 JS |
5531 | r = strv_extend(l, s); |
5532 | if (r < 0) | |
5533 | return r; | |
5534 | } | |
e3bff60a MP |
5535 | if (r < 0) |
5536 | return r; | |
60f067b4 JS |
5537 | |
5538 | r = sd_bus_message_exit_container(m); | |
5539 | if (r < 0) | |
5540 | return r; | |
5541 | ||
5542 | return 1; | |
5543 | } | |
5544 | ||
5545 | _public_ int sd_bus_message_read_strv(sd_bus_message *m, char ***l) { | |
5546 | char **strv = NULL; | |
5547 | int r; | |
5548 | ||
5549 | assert_return(m, -EINVAL); | |
5550 | assert_return(m->sealed, -EPERM); | |
5551 | assert_return(l, -EINVAL); | |
5552 | ||
5553 | r = bus_message_read_strv_extend(m, &strv); | |
5554 | if (r <= 0) { | |
5555 | strv_free(strv); | |
5556 | return r; | |
5557 | } | |
5558 | ||
5559 | *l = strv; | |
5560 | return 1; | |
5561 | } | |
5562 | ||
13d276d0 MP |
5563 | static int bus_message_get_arg_skip( |
5564 | sd_bus_message *m, | |
5565 | unsigned i, | |
5566 | char *_type, | |
5567 | const char **_contents) { | |
5568 | ||
60f067b4 | 5569 | unsigned j; |
f47781d8 | 5570 | int r; |
60f067b4 | 5571 | |
60f067b4 JS |
5572 | r = sd_bus_message_rewind(m, true); |
5573 | if (r < 0) | |
f47781d8 | 5574 | return r; |
60f067b4 | 5575 | |
f47781d8 | 5576 | for (j = 0;; j++) { |
13d276d0 MP |
5577 | const char *contents; |
5578 | char type; | |
5579 | ||
f47781d8 MP |
5580 | r = sd_bus_message_peek_type(m, &type, &contents); |
5581 | if (r < 0) | |
5582 | return r; | |
5583 | if (r == 0) | |
5584 | return -ENXIO; | |
5585 | ||
5586 | /* Don't match against arguments after the first one we don't understand */ | |
5587 | if (!IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE) && | |
5588 | !(type == SD_BUS_TYPE_ARRAY && STR_IN_SET(contents, "s", "o", "g"))) | |
5589 | return -ENXIO; | |
60f067b4 | 5590 | |
13d276d0 MP |
5591 | if (j >= i) { |
5592 | if (_contents) | |
5593 | *_contents = contents; | |
5594 | if (_type) | |
5595 | *_type = type; | |
5596 | return 0; | |
5597 | } | |
f47781d8 MP |
5598 | |
5599 | r = sd_bus_message_skip(m, NULL); | |
60f067b4 | 5600 | if (r < 0) |
f47781d8 MP |
5601 | return r; |
5602 | } | |
60f067b4 | 5603 | |
13d276d0 | 5604 | } |
60f067b4 | 5605 | |
13d276d0 MP |
5606 | int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str) { |
5607 | char type; | |
5608 | int r; | |
f47781d8 | 5609 | |
13d276d0 MP |
5610 | assert(m); |
5611 | assert(str); | |
f47781d8 | 5612 | |
13d276d0 MP |
5613 | r = bus_message_get_arg_skip(m, i, &type, NULL); |
5614 | if (r < 0) | |
5615 | return r; | |
f47781d8 | 5616 | |
13d276d0 MP |
5617 | if (!IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE)) |
5618 | return -ENXIO; | |
60f067b4 | 5619 | |
13d276d0 MP |
5620 | return sd_bus_message_read_basic(m, type, str); |
5621 | } | |
5622 | ||
5623 | int bus_message_get_arg_strv(sd_bus_message *m, unsigned i, char ***strv) { | |
5624 | const char *contents; | |
5625 | char type; | |
5626 | int r; | |
5627 | ||
5628 | assert(m); | |
5629 | assert(strv); | |
5630 | ||
5631 | r = bus_message_get_arg_skip(m, i, &type, &contents); | |
5632 | if (r < 0) | |
5633 | return r; | |
5634 | ||
5635 | if (type != SD_BUS_TYPE_ARRAY) | |
5636 | return -ENXIO; | |
5637 | if (!STR_IN_SET(contents, "s", "o", "g")) | |
5638 | return -ENXIO; | |
5639 | ||
5640 | return sd_bus_message_read_strv(m, strv); | |
60f067b4 JS |
5641 | } |
5642 | ||
60f067b4 | 5643 | _public_ int sd_bus_message_get_errno(sd_bus_message *m) { |
5eef597e | 5644 | assert_return(m, EINVAL); |
60f067b4 JS |
5645 | |
5646 | if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
5647 | return 0; | |
5648 | ||
5649 | return sd_bus_error_get_errno(&m->error); | |
5650 | } | |
5651 | ||
5652 | _public_ const char* sd_bus_message_get_signature(sd_bus_message *m, int complete) { | |
5653 | struct bus_container *c; | |
5654 | ||
5655 | assert_return(m, NULL); | |
5656 | ||
5657 | c = complete ? &m->root_container : message_get_container(m); | |
5658 | return strempty(c->signature); | |
5659 | } | |
5660 | ||
f47781d8 MP |
5661 | _public_ int sd_bus_message_is_empty(sd_bus_message *m) { |
5662 | assert_return(m, -EINVAL); | |
5663 | ||
5664 | return isempty(m->root_container.signature); | |
5665 | } | |
5666 | ||
5667 | _public_ int sd_bus_message_has_signature(sd_bus_message *m, const char *signature) { | |
5668 | assert_return(m, -EINVAL); | |
5669 | ||
5670 | return streq(strempty(m->root_container.signature), strempty(signature)); | |
5671 | } | |
5672 | ||
60f067b4 JS |
5673 | _public_ int sd_bus_message_copy(sd_bus_message *m, sd_bus_message *source, int all) { |
5674 | bool done_something = false; | |
5675 | int r; | |
5676 | ||
5677 | assert_return(m, -EINVAL); | |
5678 | assert_return(source, -EINVAL); | |
5679 | assert_return(!m->sealed, -EPERM); | |
5680 | assert_return(source->sealed, -EPERM); | |
5681 | ||
5682 | do { | |
5683 | const char *contents; | |
5684 | char type; | |
5685 | union { | |
5686 | uint8_t u8; | |
5687 | uint16_t u16; | |
5688 | int16_t s16; | |
5689 | uint32_t u32; | |
5690 | int32_t s32; | |
5691 | uint64_t u64; | |
5692 | int64_t s64; | |
5693 | double d64; | |
5694 | const char *string; | |
5695 | int i; | |
5696 | } basic; | |
5697 | ||
5698 | r = sd_bus_message_peek_type(source, &type, &contents); | |
5699 | if (r < 0) | |
5700 | return r; | |
5701 | if (r == 0) | |
5702 | break; | |
5703 | ||
5704 | done_something = true; | |
5705 | ||
5706 | if (bus_type_is_container(type) > 0) { | |
5707 | ||
5708 | r = sd_bus_message_enter_container(source, type, contents); | |
5709 | if (r < 0) | |
5710 | return r; | |
5711 | ||
5712 | r = sd_bus_message_open_container(m, type, contents); | |
5713 | if (r < 0) | |
5714 | return r; | |
5715 | ||
5716 | r = sd_bus_message_copy(m, source, true); | |
5717 | if (r < 0) | |
5718 | return r; | |
5719 | ||
5720 | r = sd_bus_message_close_container(m); | |
5721 | if (r < 0) | |
5722 | return r; | |
5723 | ||
5724 | r = sd_bus_message_exit_container(source); | |
5725 | if (r < 0) | |
5726 | return r; | |
5727 | ||
5728 | continue; | |
5729 | } | |
5730 | ||
5731 | r = sd_bus_message_read_basic(source, type, &basic); | |
5732 | if (r < 0) | |
5733 | return r; | |
5734 | ||
5735 | assert(r > 0); | |
5736 | ||
f5e65279 | 5737 | if (IN_SET(type, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE, SD_BUS_TYPE_STRING)) |
60f067b4 JS |
5738 | r = sd_bus_message_append_basic(m, type, basic.string); |
5739 | else | |
5740 | r = sd_bus_message_append_basic(m, type, &basic); | |
5741 | ||
5742 | if (r < 0) | |
5743 | return r; | |
5744 | ||
5745 | } while (all); | |
5746 | ||
5747 | return done_something; | |
5748 | } | |
5749 | ||
5750 | _public_ int sd_bus_message_verify_type(sd_bus_message *m, char type, const char *contents) { | |
5751 | const char *c; | |
5752 | char t; | |
5753 | int r; | |
5754 | ||
5755 | assert_return(m, -EINVAL); | |
5756 | assert_return(m->sealed, -EPERM); | |
5757 | assert_return(!type || bus_type_is_valid(type), -EINVAL); | |
5758 | assert_return(!contents || signature_is_valid(contents, true), -EINVAL); | |
5759 | assert_return(type || contents, -EINVAL); | |
5760 | assert_return(!contents || !type || bus_type_is_container(type), -EINVAL); | |
5761 | ||
5762 | r = sd_bus_message_peek_type(m, &t, &c); | |
5763 | if (r <= 0) | |
5764 | return r; | |
5765 | ||
5766 | if (type != 0 && type != t) | |
5767 | return 0; | |
5768 | ||
5769 | if (contents && !streq_ptr(contents, c)) | |
5770 | return 0; | |
5771 | ||
5772 | return 1; | |
5773 | } | |
5774 | ||
5775 | _public_ sd_bus *sd_bus_message_get_bus(sd_bus_message *m) { | |
5776 | assert_return(m, NULL); | |
5777 | ||
5778 | return m->bus; | |
5779 | } | |
5780 | ||
5781 | int bus_message_remarshal(sd_bus *bus, sd_bus_message **m) { | |
4c89c718 | 5782 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *n = NULL; |
60f067b4 JS |
5783 | usec_t timeout; |
5784 | int r; | |
5785 | ||
5786 | assert(bus); | |
5787 | assert(m); | |
5788 | assert(*m); | |
5789 | ||
5790 | switch ((*m)->header->type) { | |
5791 | ||
5792 | case SD_BUS_MESSAGE_SIGNAL: | |
5793 | r = sd_bus_message_new_signal(bus, &n, (*m)->path, (*m)->interface, (*m)->member); | |
5794 | if (r < 0) | |
5795 | return r; | |
5796 | ||
5797 | break; | |
5798 | ||
5799 | case SD_BUS_MESSAGE_METHOD_CALL: | |
5800 | r = sd_bus_message_new_method_call(bus, &n, (*m)->destination, (*m)->path, (*m)->interface, (*m)->member); | |
5801 | if (r < 0) | |
5802 | return r; | |
5803 | ||
5804 | break; | |
5805 | ||
5806 | case SD_BUS_MESSAGE_METHOD_RETURN: | |
5807 | case SD_BUS_MESSAGE_METHOD_ERROR: | |
5808 | ||
52ad194e MB |
5809 | r = sd_bus_message_new(bus, &n, (*m)->header->type); |
5810 | if (r < 0) | |
60f067b4 JS |
5811 | return -ENOMEM; |
5812 | ||
52ad194e MB |
5813 | assert(n); |
5814 | ||
60f067b4 | 5815 | n->reply_cookie = (*m)->reply_cookie; |
e735f4d4 MP |
5816 | |
5817 | r = message_append_reply_cookie(n, n->reply_cookie); | |
60f067b4 JS |
5818 | if (r < 0) |
5819 | return r; | |
5820 | ||
5821 | if ((*m)->header->type == SD_BUS_MESSAGE_METHOD_ERROR && (*m)->error.name) { | |
5822 | r = message_append_field_string(n, BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, (*m)->error.name, &n->error.message); | |
5823 | if (r < 0) | |
5824 | return r; | |
5825 | ||
5826 | n->error._need_free = -1; | |
5827 | } | |
5828 | ||
5829 | break; | |
5830 | ||
5831 | default: | |
5832 | return -EINVAL; | |
5833 | } | |
5834 | ||
5835 | if ((*m)->destination && !n->destination) { | |
5836 | r = message_append_field_string(n, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, (*m)->destination, &n->destination); | |
5837 | if (r < 0) | |
5838 | return r; | |
5839 | } | |
5840 | ||
5841 | if ((*m)->sender && !n->sender) { | |
5842 | r = message_append_field_string(n, BUS_MESSAGE_HEADER_SENDER, SD_BUS_TYPE_STRING, (*m)->sender, &n->sender); | |
5843 | if (r < 0) | |
5844 | return r; | |
5845 | } | |
5846 | ||
5847 | n->header->flags |= (*m)->header->flags & (BUS_MESSAGE_NO_REPLY_EXPECTED|BUS_MESSAGE_NO_AUTO_START); | |
5848 | ||
5849 | r = sd_bus_message_copy(n, *m, true); | |
5850 | if (r < 0) | |
5851 | return r; | |
5852 | ||
5853 | timeout = (*m)->timeout; | |
5854 | if (timeout == 0 && !((*m)->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)) | |
5855 | timeout = BUS_DEFAULT_TIMEOUT; | |
5856 | ||
52ad194e | 5857 | r = sd_bus_message_seal(n, BUS_MESSAGE_COOKIE(*m), timeout); |
60f067b4 JS |
5858 | if (r < 0) |
5859 | return r; | |
5860 | ||
5861 | sd_bus_message_unref(*m); | |
5862 | *m = n; | |
5863 | n = NULL; | |
5864 | ||
5865 | return 0; | |
5866 | } | |
5867 | ||
5868 | int bus_message_append_sender(sd_bus_message *m, const char *sender) { | |
5869 | assert(m); | |
5870 | assert(sender); | |
5871 | ||
5872 | assert_return(!m->sealed, -EPERM); | |
5873 | assert_return(!m->sender, -EPERM); | |
5874 | ||
5875 | return message_append_field_string(m, BUS_MESSAGE_HEADER_SENDER, SD_BUS_TYPE_STRING, sender, &m->sender); | |
5876 | } | |
5877 | ||
5878 | _public_ int sd_bus_message_get_priority(sd_bus_message *m, int64_t *priority) { | |
5879 | assert_return(m, -EINVAL); | |
5880 | assert_return(priority, -EINVAL); | |
5881 | ||
5882 | *priority = m->priority; | |
5883 | return 0; | |
5884 | } | |
5885 | ||
5886 | _public_ int sd_bus_message_set_priority(sd_bus_message *m, int64_t priority) { | |
5887 | assert_return(m, -EINVAL); | |
5888 | assert_return(!m->sealed, -EPERM); | |
5889 | ||
5890 | m->priority = priority; | |
5891 | return 0; | |
5892 | } |