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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
de1c301e LP |
2 | |
3 | #include <errno.h> | |
2c93b4ef | 4 | #include <fcntl.h> |
bc7fd8cd | 5 | #include <sys/mman.h> |
de1c301e | 6 | |
de1c301e | 7 | #include "sd-bus.h" |
07630cea | 8 | |
b5efdb8a | 9 | #include "alloc-util.h" |
07630cea | 10 | #include "bus-gvariant.h" |
de1c301e | 11 | #include "bus-internal.h" |
3ffd4af2 | 12 | #include "bus-message.h" |
de1c301e | 13 | #include "bus-signature.h" |
07630cea | 14 | #include "bus-type.h" |
057171ef | 15 | #include "bus-util.h" |
3ffd4af2 | 16 | #include "fd-util.h" |
afc5dbf3 | 17 | #include "io-util.h" |
07630cea LP |
18 | #include "memfd-util.h" |
19 | #include "string-util.h" | |
20 | #include "strv.h" | |
21 | #include "time-util.h" | |
22 | #include "utf8.h" | |
23 | #include "util.h" | |
de1c301e | 24 | |
80a46c73 | 25 | static int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored); |
de1c301e | 26 | |
bc7fd8cd LP |
27 | static void *adjust_pointer(const void *p, void *old_base, size_t sz, void *new_base) { |
28 | ||
29 | if (p == NULL) | |
30 | return NULL; | |
31 | ||
32 | if (old_base == new_base) | |
33 | return (void*) p; | |
34 | ||
35 | if ((uint8_t*) p < (uint8_t*) old_base) | |
36 | return (void*) p; | |
37 | ||
38 | if ((uint8_t*) p >= (uint8_t*) old_base + sz) | |
39 | return (void*) p; | |
40 | ||
41 | return (uint8_t*) new_base + ((uint8_t*) p - (uint8_t*) old_base); | |
42 | } | |
43 | ||
44 | static void message_free_part(sd_bus_message *m, struct bus_body_part *part) { | |
45 | assert(m); | |
46 | assert(part); | |
47 | ||
a132bef0 ZJS |
48 | if (part->memfd >= 0) |
49 | close_and_munmap(part->memfd, part->mmap_begin, part->mapped); | |
50 | else if (part->munmap_this) | |
7dcd79c2 | 51 | munmap(part->mmap_begin, part->mapped); |
453a0c29 | 52 | else if (part->free_this) |
bc7fd8cd LP |
53 | free(part->data); |
54 | ||
55 | if (part != &m->body) | |
56 | free(part); | |
57 | } | |
58 | ||
59 | static void message_reset_parts(sd_bus_message *m) { | |
60 | struct bus_body_part *part; | |
61 | ||
62 | assert(m); | |
63 | ||
64 | part = &m->body; | |
65 | while (m->n_body_parts > 0) { | |
66 | struct bus_body_part *next = part->next; | |
67 | message_free_part(m, part); | |
68 | part = next; | |
69 | m->n_body_parts--; | |
70 | } | |
71 | ||
72 | m->body_end = NULL; | |
73 | ||
74 | m->cached_rindex_part = NULL; | |
75 | m->cached_rindex_part_begin = 0; | |
76 | } | |
77 | ||
9c65778d | 78 | static struct bus_container *message_get_last_container(sd_bus_message *m) { |
6d1e0f4f ZJS |
79 | assert(m); |
80 | ||
81 | if (m->n_containers == 0) | |
82 | return &m->root_container; | |
83 | ||
84 | assert(m->containers); | |
85 | return m->containers + m->n_containers - 1; | |
86 | } | |
87 | ||
88 | static void message_free_last_container(sd_bus_message *m) { | |
89 | struct bus_container *c; | |
90 | ||
9c65778d | 91 | c = message_get_last_container(m); |
6d1e0f4f ZJS |
92 | |
93 | free(c->signature); | |
94 | free(c->peeked_signature); | |
95 | free(c->offsets); | |
96 | ||
97 | /* Move to previous container, but not if we are on root container */ | |
98 | if (m->n_containers > 0) | |
99 | m->n_containers--; | |
100 | } | |
9a17484d | 101 | |
6d1e0f4f | 102 | static void message_reset_containers(sd_bus_message *m) { |
9a17484d LP |
103 | assert(m); |
104 | ||
6d1e0f4f ZJS |
105 | while (m->n_containers > 0) |
106 | message_free_last_container(m); | |
9a17484d | 107 | |
a1e58e8e | 108 | m->containers = mfree(m->containers); |
6d1e0f4f | 109 | m->containers_allocated = 0; |
9a17484d LP |
110 | m->root_container.index = 0; |
111 | } | |
112 | ||
2ab3a635 | 113 | static sd_bus_message* message_free(sd_bus_message *m) { |
de1c301e LP |
114 | assert(m); |
115 | ||
116 | if (m->free_header) | |
117 | free(m->header); | |
118 | ||
bc7fd8cd | 119 | message_reset_parts(m); |
de1c301e | 120 | |
2a0958d2 | 121 | sd_bus_unref(m->bus); |
f54514f3 | 122 | |
2c93b4ef LP |
123 | if (m->free_fds) { |
124 | close_many(m->fds, m->n_fds); | |
125 | free(m->fds); | |
126 | } | |
de1c301e | 127 | |
bc7fd8cd LP |
128 | if (m->iovec != m->iovec_fixed) |
129 | free(m->iovec); | |
130 | ||
bc7fd8cd | 131 | message_reset_containers(m); |
6d1e0f4f ZJS |
132 | assert(m->n_containers == 0); |
133 | message_free_last_container(m); | |
d8d3d8a7 | 134 | |
5b12334d | 135 | bus_creds_done(&m->creds); |
2ab3a635 | 136 | return mfree(m); |
de1c301e LP |
137 | } |
138 | ||
2ab3a635 DT |
139 | DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus_message*, message_free); |
140 | ||
c1b9d935 | 141 | static void *message_extend_fields(sd_bus_message *m, size_t align, size_t sz, bool add_offset) { |
c91cb83c LP |
142 | void *op, *np; |
143 | size_t old_size, new_size, start; | |
de1c301e | 144 | |
c91cb83c | 145 | assert(m); |
35460afc LP |
146 | |
147 | if (m->poisoned) | |
148 | return NULL; | |
de1c301e | 149 | |
2ac7c17f | 150 | old_size = sizeof(struct bus_header) + m->fields_size; |
c91cb83c LP |
151 | start = ALIGN_TO(old_size, align); |
152 | new_size = start + sz; | |
de1c301e | 153 | |
2ac7c17f LP |
154 | if (new_size < start || |
155 | new_size > (size_t) ((uint32_t) -1)) | |
156 | goto poison; | |
157 | ||
c91cb83c LP |
158 | if (old_size == new_size) |
159 | return (uint8_t*) m->header + old_size; | |
de1c301e | 160 | |
c91cb83c LP |
161 | if (m->free_header) { |
162 | np = realloc(m->header, ALIGN8(new_size)); | |
163 | if (!np) | |
164 | goto poison; | |
165 | } else { | |
61233823 | 166 | /* Initially, the header is allocated as part of |
c91cb83c LP |
167 | * the sd_bus_message itself, let's replace it by |
168 | * dynamic data */ | |
de1c301e | 169 | |
c91cb83c LP |
170 | np = malloc(ALIGN8(new_size)); |
171 | if (!np) | |
172 | goto poison; | |
de1c301e | 173 | |
c91cb83c LP |
174 | memcpy(np, m->header, sizeof(struct bus_header)); |
175 | } | |
de1c301e | 176 | |
c91cb83c LP |
177 | /* Zero out padding */ |
178 | if (start > old_size) | |
29804cc1 | 179 | memzero((uint8_t*) np + old_size, start - old_size); |
bc7fd8cd | 180 | |
c91cb83c LP |
181 | op = m->header; |
182 | m->header = np; | |
2ac7c17f | 183 | m->fields_size = new_size - sizeof(struct bus_header); |
de1c301e | 184 | |
bc7fd8cd | 185 | /* Adjust quick access pointers */ |
c91cb83c LP |
186 | m->path = adjust_pointer(m->path, op, old_size, m->header); |
187 | m->interface = adjust_pointer(m->interface, op, old_size, m->header); | |
188 | m->member = adjust_pointer(m->member, op, old_size, m->header); | |
189 | m->destination = adjust_pointer(m->destination, op, old_size, m->header); | |
190 | m->sender = adjust_pointer(m->sender, op, old_size, m->header); | |
191 | m->error.name = adjust_pointer(m->error.name, op, old_size, m->header); | |
bc7fd8cd | 192 | |
c91cb83c | 193 | m->free_header = true; |
de1c301e | 194 | |
c1b9d935 LP |
195 | if (add_offset) { |
196 | if (m->n_header_offsets >= ELEMENTSOF(m->header_offsets)) | |
197 | goto poison; | |
198 | ||
199 | m->header_offsets[m->n_header_offsets++] = new_size - sizeof(struct bus_header); | |
200 | } | |
201 | ||
c91cb83c LP |
202 | return (uint8_t*) np + start; |
203 | ||
204 | poison: | |
205 | m->poisoned = true; | |
206 | return NULL; | |
de1c301e LP |
207 | } |
208 | ||
209 | static int message_append_field_string( | |
210 | sd_bus_message *m, | |
2ac7c17f | 211 | uint64_t h, |
de1c301e LP |
212 | char type, |
213 | const char *s, | |
214 | const char **ret) { | |
215 | ||
216 | size_t l; | |
217 | uint8_t *p; | |
218 | ||
219 | assert(m); | |
220 | ||
2ac7c17f LP |
221 | /* dbus1 only allows 8bit header field ids */ |
222 | if (h > 0xFF) | |
223 | return -EINVAL; | |
224 | ||
c1b9d935 LP |
225 | /* dbus1 doesn't allow strings over 32bit, let's enforce this |
226 | * globally, to not risk convertability */ | |
de1c301e | 227 | l = strlen(s); |
f22c308a | 228 | if (l > UINT32_MAX) |
de1c301e LP |
229 | return -EINVAL; |
230 | ||
c1b9d935 LP |
231 | /* Signature "(yv)" where the variant contains "s" */ |
232 | ||
6647dc66 | 233 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
de1c301e | 234 | |
2ac7c17f LP |
235 | /* (field id 64bit, ((string + NUL) + NUL + signature string 's') */ |
236 | p = message_extend_fields(m, 8, 8 + l + 1 + 1 + 1, true); | |
c1b9d935 LP |
237 | if (!p) |
238 | return -ENOMEM; | |
de1c301e | 239 | |
2ac7c17f | 240 | *((uint64_t*) p) = h; |
c1b9d935 LP |
241 | memcpy(p+8, s, l); |
242 | p[8+l] = 0; | |
243 | p[8+l+1] = 0; | |
244 | p[8+l+2] = type; | |
de1c301e | 245 | |
c1b9d935 | 246 | if (ret) |
6647dc66 | 247 | *ret = (char*) p + 8; |
c1b9d935 LP |
248 | |
249 | } else { | |
250 | /* (field id byte + (signature length + signature 's' + NUL) + (string length + string + NUL)) */ | |
251 | p = message_extend_fields(m, 8, 4 + 4 + l + 1, false); | |
252 | if (!p) | |
253 | return -ENOMEM; | |
254 | ||
2ac7c17f | 255 | p[0] = (uint8_t) h; |
c1b9d935 LP |
256 | p[1] = 1; |
257 | p[2] = type; | |
258 | p[3] = 0; | |
259 | ||
260 | ((uint32_t*) p)[1] = l; | |
261 | memcpy(p + 8, s, l + 1); | |
262 | ||
263 | if (ret) | |
264 | *ret = (char*) p + 8; | |
265 | } | |
de1c301e LP |
266 | |
267 | return 0; | |
268 | } | |
269 | ||
270 | static int message_append_field_signature( | |
271 | sd_bus_message *m, | |
2ac7c17f | 272 | uint64_t h, |
de1c301e LP |
273 | const char *s, |
274 | const char **ret) { | |
275 | ||
276 | size_t l; | |
277 | uint8_t *p; | |
278 | ||
279 | assert(m); | |
280 | ||
2ac7c17f LP |
281 | /* dbus1 only allows 8bit header field ids */ |
282 | if (h > 0xFF) | |
283 | return -EINVAL; | |
284 | ||
285 | /* dbus1 doesn't allow signatures over 8bit, let's enforce | |
c1b9d935 | 286 | * this globally, to not risk convertability */ |
de1c301e LP |
287 | l = strlen(s); |
288 | if (l > 255) | |
289 | return -EINVAL; | |
290 | ||
c1b9d935 LP |
291 | /* Signature "(yv)" where the variant contains "g" */ |
292 | ||
6647dc66 | 293 | if (BUS_MESSAGE_IS_GVARIANT(m)) |
c1b9d935 LP |
294 | /* For gvariant the serialization is the same as for normal strings */ |
295 | return message_append_field_string(m, h, 'g', s, ret); | |
296 | else { | |
297 | /* (field id byte + (signature length + signature 'g' + NUL) + (string length + string + NUL)) */ | |
298 | p = message_extend_fields(m, 8, 4 + 1 + l + 1, false); | |
299 | if (!p) | |
300 | return -ENOMEM; | |
de1c301e | 301 | |
2ac7c17f | 302 | p[0] = (uint8_t) h; |
c1b9d935 LP |
303 | p[1] = 1; |
304 | p[2] = SD_BUS_TYPE_SIGNATURE; | |
305 | p[3] = 0; | |
306 | p[4] = l; | |
307 | memcpy(p + 5, s, l + 1); | |
de1c301e | 308 | |
c1b9d935 LP |
309 | if (ret) |
310 | *ret = (const char*) p + 5; | |
311 | } | |
de1c301e LP |
312 | |
313 | return 0; | |
314 | } | |
315 | ||
2ac7c17f | 316 | static int message_append_field_uint32(sd_bus_message *m, uint64_t h, uint32_t x) { |
de1c301e LP |
317 | uint8_t *p; |
318 | ||
319 | assert(m); | |
320 | ||
2ac7c17f LP |
321 | /* dbus1 only allows 8bit header field ids */ |
322 | if (h > 0xFF) | |
323 | return -EINVAL; | |
324 | ||
6647dc66 | 325 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f | 326 | /* (field id 64bit + ((value + NUL + signature string 'u') */ |
c1b9d935 | 327 | |
2ac7c17f | 328 | p = message_extend_fields(m, 8, 8 + 4 + 1 + 1, true); |
c1b9d935 LP |
329 | if (!p) |
330 | return -ENOMEM; | |
de1c301e | 331 | |
2ac7c17f | 332 | *((uint64_t*) p) = h; |
c1b9d935 LP |
333 | *((uint32_t*) (p + 8)) = x; |
334 | p[12] = 0; | |
335 | p[13] = 'u'; | |
336 | } else { | |
337 | /* (field id byte + (signature length + signature 'u' + NUL) + value) */ | |
338 | p = message_extend_fields(m, 8, 4 + 4, false); | |
339 | if (!p) | |
340 | return -ENOMEM; | |
341 | ||
2ac7c17f | 342 | p[0] = (uint8_t) h; |
c1b9d935 | 343 | p[1] = 1; |
2ac7c17f | 344 | p[2] = 'u'; |
c1b9d935 | 345 | p[3] = 0; |
de1c301e | 346 | |
c1b9d935 LP |
347 | ((uint32_t*) p)[1] = x; |
348 | } | |
de1c301e LP |
349 | |
350 | return 0; | |
351 | } | |
352 | ||
2ac7c17f LP |
353 | static int message_append_field_uint64(sd_bus_message *m, uint64_t h, uint64_t x) { |
354 | uint8_t *p; | |
355 | ||
356 | assert(m); | |
357 | ||
358 | /* dbus1 only allows 8bit header field ids */ | |
359 | if (h > 0xFF) | |
360 | return -EINVAL; | |
361 | ||
362 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
363 | /* (field id 64bit + ((value + NUL + signature string 't') */ | |
364 | ||
365 | p = message_extend_fields(m, 8, 8 + 8 + 1 + 1, true); | |
366 | if (!p) | |
367 | return -ENOMEM; | |
368 | ||
369 | *((uint64_t*) p) = h; | |
370 | *((uint64_t*) (p + 8)) = x; | |
371 | p[16] = 0; | |
372 | p[17] = 't'; | |
373 | } else { | |
374 | /* (field id byte + (signature length + signature 't' + NUL) + 4 byte padding + value) */ | |
375 | p = message_extend_fields(m, 8, 4 + 4 + 8, false); | |
376 | if (!p) | |
377 | return -ENOMEM; | |
378 | ||
379 | p[0] = (uint8_t) h; | |
380 | p[1] = 1; | |
381 | p[2] = 't'; | |
382 | p[3] = 0; | |
383 | p[4] = 0; | |
384 | p[5] = 0; | |
385 | p[6] = 0; | |
386 | p[7] = 0; | |
387 | ||
388 | ((uint64_t*) p)[1] = x; | |
389 | } | |
390 | ||
391 | return 0; | |
392 | } | |
393 | ||
b267a6d2 LP |
394 | static int message_append_reply_cookie(sd_bus_message *m, uint64_t cookie) { |
395 | assert(m); | |
396 | ||
397 | if (BUS_MESSAGE_IS_GVARIANT(m)) | |
398 | return message_append_field_uint64(m, BUS_MESSAGE_HEADER_REPLY_SERIAL, cookie); | |
399 | else { | |
400 | /* 64bit cookies are not supported on dbus1 */ | |
401 | if (cookie > 0xffffffffUL) | |
15411c0c | 402 | return -EOPNOTSUPP; |
b267a6d2 LP |
403 | |
404 | return message_append_field_uint32(m, BUS_MESSAGE_HEADER_REPLY_SERIAL, (uint32_t) cookie); | |
405 | } | |
406 | } | |
407 | ||
6629161f | 408 | int bus_message_from_header( |
df2d202e | 409 | sd_bus *bus, |
2ac7c17f LP |
410 | void *header, |
411 | size_t header_accessible, | |
412 | void *footer, | |
413 | size_t footer_accessible, | |
414 | size_t message_size, | |
2c93b4ef | 415 | int *fds, |
da6053d0 | 416 | size_t n_fds, |
2571ead1 | 417 | const char *label, |
6629161f | 418 | size_t extra, |
2571ead1 LP |
419 | sd_bus_message **ret) { |
420 | ||
bcf88fc3 | 421 | _cleanup_free_ sd_bus_message *m = NULL; |
80a46c73 | 422 | struct bus_header *h; |
6629161f | 423 | size_t a, label_sz; |
80a46c73 | 424 | |
2a0958d2 | 425 | assert(bus); |
2ac7c17f LP |
426 | assert(header || header_accessible <= 0); |
427 | assert(footer || footer_accessible <= 0); | |
2c93b4ef | 428 | assert(fds || n_fds <= 0); |
80a46c73 LP |
429 | assert(ret); |
430 | ||
2ac7c17f | 431 | if (header_accessible < sizeof(struct bus_header)) |
80a46c73 LP |
432 | return -EBADMSG; |
433 | ||
2ac7c17f LP |
434 | if (header_accessible > message_size) |
435 | return -EBADMSG; | |
436 | if (footer_accessible > message_size) | |
80a46c73 LP |
437 | return -EBADMSG; |
438 | ||
2ac7c17f | 439 | h = header; |
bcf88fc3 | 440 | if (!IN_SET(h->version, 1, 2)) |
954871d8 KS |
441 | return -EBADMSG; |
442 | ||
80a46c73 LP |
443 | if (h->type == _SD_BUS_MESSAGE_TYPE_INVALID) |
444 | return -EBADMSG; | |
445 | ||
bcf88fc3 | 446 | if (!IN_SET(h->endian, BUS_LITTLE_ENDIAN, BUS_BIG_ENDIAN)) |
80a46c73 LP |
447 | return -EBADMSG; |
448 | ||
2ac7c17f LP |
449 | /* Note that we are happy with unknown flags in the flags header! */ |
450 | ||
6629161f | 451 | a = ALIGN(sizeof(sd_bus_message)) + ALIGN(extra); |
80a46c73 | 452 | |
2571ead1 LP |
453 | if (label) { |
454 | label_sz = strlen(label); | |
6629161f LP |
455 | a += label_sz + 1; |
456 | } | |
2571ead1 LP |
457 | |
458 | m = malloc0(a); | |
80a46c73 LP |
459 | if (!m) |
460 | return -ENOMEM; | |
461 | ||
2c93b4ef | 462 | m->sealed = true; |
2ac7c17f LP |
463 | m->header = header; |
464 | m->header_accessible = header_accessible; | |
465 | m->footer = footer; | |
466 | m->footer_accessible = footer_accessible; | |
467 | ||
468 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
469 | size_t ws; | |
470 | ||
471 | if (h->dbus2.cookie == 0) | |
472 | return -EBADMSG; | |
473 | ||
474 | /* dbus2 derives the sizes from the message size and | |
475 | the offset table at the end, since it is formatted as | |
476 | gvariant "yyyyuta{tv}v". Since the message itself is a | |
477 | structure with precisely to variable sized entries, | |
478 | there's only one offset in the table, which marks the | |
479 | end of the fields array. */ | |
480 | ||
481 | ws = bus_gvariant_determine_word_size(message_size, 0); | |
482 | if (footer_accessible < ws) | |
483 | return -EBADMSG; | |
484 | ||
485 | m->fields_size = bus_gvariant_read_word_le((uint8_t*) footer + footer_accessible - ws, ws); | |
486 | if (ALIGN8(m->fields_size) > message_size - ws) | |
487 | return -EBADMSG; | |
488 | if (m->fields_size < sizeof(struct bus_header)) | |
489 | return -EBADMSG; | |
490 | ||
491 | m->fields_size -= sizeof(struct bus_header); | |
492 | m->body_size = message_size - (sizeof(struct bus_header) + ALIGN8(m->fields_size)); | |
493 | } else { | |
494 | if (h->dbus1.serial == 0) | |
495 | return -EBADMSG; | |
496 | ||
497 | /* dbus1 has the sizes in the header */ | |
498 | m->fields_size = BUS_MESSAGE_BSWAP32(m, h->dbus1.fields_size); | |
499 | m->body_size = BUS_MESSAGE_BSWAP32(m, h->dbus1.body_size); | |
500 | ||
501 | if (sizeof(struct bus_header) + ALIGN8(m->fields_size) + m->body_size != message_size) | |
502 | return -EBADMSG; | |
503 | } | |
504 | ||
2c93b4ef LP |
505 | m->fds = fds; |
506 | m->n_fds = n_fds; | |
80a46c73 | 507 | |
2571ead1 | 508 | if (label) { |
5b12334d LP |
509 | m->creds.label = (char*) m + ALIGN(sizeof(sd_bus_message)) + ALIGN(extra); |
510 | memcpy(m->creds.label, label, label_sz + 1); | |
511 | ||
512 | m->creds.mask |= SD_BUS_CREDS_SELINUX_CONTEXT; | |
2571ead1 LP |
513 | } |
514 | ||
e593b6a8 | 515 | m->n_ref = 1; |
2a0958d2 | 516 | m->bus = sd_bus_ref(bus); |
e593b6a8 | 517 | |
1cc6c93a | 518 | *ret = TAKE_PTR(m); |
2a0958d2 | 519 | |
6629161f LP |
520 | return 0; |
521 | } | |
522 | ||
523 | int bus_message_from_malloc( | |
df2d202e | 524 | sd_bus *bus, |
6629161f LP |
525 | void *buffer, |
526 | size_t length, | |
527 | int *fds, | |
da6053d0 | 528 | size_t n_fds, |
6629161f LP |
529 | const char *label, |
530 | sd_bus_message **ret) { | |
531 | ||
2ab3a635 | 532 | _cleanup_(message_freep) sd_bus_message *m = NULL; |
5461f53f | 533 | size_t sz; |
6629161f LP |
534 | int r; |
535 | ||
2ac7c17f LP |
536 | r = bus_message_from_header( |
537 | bus, | |
538 | buffer, length, /* in this case the initial bytes and the final bytes are the same */ | |
539 | buffer, length, | |
540 | length, | |
541 | fds, n_fds, | |
aa0d0ed6 | 542 | label, |
2ac7c17f | 543 | 0, &m); |
6629161f LP |
544 | if (r < 0) |
545 | return r; | |
546 | ||
2ac7c17f | 547 | sz = length - sizeof(struct bus_header) - ALIGN8(m->fields_size); |
5461f53f LP |
548 | if (sz > 0) { |
549 | m->n_body_parts = 1; | |
2ac7c17f | 550 | m->body.data = (uint8_t*) buffer + sizeof(struct bus_header) + ALIGN8(m->fields_size); |
5461f53f LP |
551 | m->body.size = sz; |
552 | m->body.sealed = true; | |
553 | m->body.memfd = -1; | |
554 | } | |
6629161f | 555 | |
80a46c73 | 556 | m->n_iovec = 1; |
bc7fd8cd | 557 | m->iovec = m->iovec_fixed; |
cb310866 | 558 | m->iovec[0] = IOVEC_MAKE(buffer, length); |
80a46c73 | 559 | |
6629161f | 560 | r = bus_message_parse_fields(m); |
2c93b4ef | 561 | if (r < 0) |
2ab3a635 | 562 | return r; |
2c93b4ef LP |
563 | |
564 | /* We take possession of the memory and fds now */ | |
565 | m->free_header = true; | |
566 | m->free_fds = true; | |
80a46c73 | 567 | |
2ab3a635 | 568 | *ret = TAKE_PTR(m); |
80a46c73 LP |
569 | return 0; |
570 | } | |
571 | ||
75bcbcf2 SA |
572 | _public_ int sd_bus_message_new( |
573 | sd_bus *bus, | |
574 | sd_bus_message **m, | |
575 | uint8_t type) { | |
de1c301e | 576 | |
75bcbcf2 | 577 | sd_bus_message *t; |
2a0958d2 | 578 | |
75bcbcf2 SA |
579 | assert_return(bus, -ENOTCONN); |
580 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
581 | assert_return(m, -EINVAL); | |
41f23fe8 | 582 | assert_return(type < _SD_BUS_MESSAGE_TYPE_MAX, -EINVAL); |
de1c301e | 583 | |
75bcbcf2 SA |
584 | t = malloc0(ALIGN(sizeof(sd_bus_message)) + sizeof(struct bus_header)); |
585 | if (!t) | |
586 | return -ENOMEM; | |
587 | ||
588 | t->n_ref = 1; | |
e593b6a8 | 589 | t->bus = sd_bus_ref(bus); |
75bcbcf2 SA |
590 | t->header = (struct bus_header*) ((uint8_t*) t + ALIGN(sizeof(struct sd_bus_message))); |
591 | t->header->endian = BUS_NATIVE_ENDIAN; | |
592 | t->header->type = type; | |
593 | t->header->version = bus->message_version; | |
594 | t->allow_fds = bus->can_fds || !IN_SET(bus->state, BUS_HELLO, BUS_RUNNING); | |
595 | t->root_container.need_offsets = BUS_MESSAGE_IS_GVARIANT(t); | |
9b05bc48 | 596 | |
c0765ddb | 597 | if (bus->allow_interactive_authorization) |
75bcbcf2 | 598 | t->header->flags |= BUS_MESSAGE_ALLOW_INTERACTIVE_AUTHORIZATION; |
c0765ddb | 599 | |
75bcbcf2 SA |
600 | *m = t; |
601 | return 0; | |
de1c301e LP |
602 | } |
603 | ||
d9f644e2 | 604 | _public_ int sd_bus_message_new_signal( |
de1c301e | 605 | sd_bus *bus, |
151b9b96 | 606 | sd_bus_message **m, |
de1c301e LP |
607 | const char *path, |
608 | const char *interface, | |
151b9b96 | 609 | const char *member) { |
de1c301e | 610 | |
2ab3a635 | 611 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *t = NULL; |
de1c301e LP |
612 | int r; |
613 | ||
2a0958d2 LP |
614 | assert_return(bus, -ENOTCONN); |
615 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
9d6c7c82 LP |
616 | assert_return(object_path_is_valid(path), -EINVAL); |
617 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
618 | assert_return(member_name_is_valid(member), -EINVAL); | |
619 | assert_return(m, -EINVAL); | |
de1c301e | 620 | |
75bcbcf2 SA |
621 | r = sd_bus_message_new(bus, &t, SD_BUS_MESSAGE_SIGNAL); |
622 | if (r < 0) | |
de1c301e LP |
623 | return -ENOMEM; |
624 | ||
75bcbcf2 SA |
625 | assert(t); |
626 | ||
0461f8cd | 627 | t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
89ffcd2a | 628 | |
0461f8cd | 629 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path); |
de1c301e | 630 | if (r < 0) |
2ab3a635 | 631 | return r; |
0461f8cd | 632 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_INTERFACE, SD_BUS_TYPE_STRING, interface, &t->interface); |
de1c301e | 633 | if (r < 0) |
2ab3a635 | 634 | return r; |
0461f8cd | 635 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_MEMBER, SD_BUS_TYPE_STRING, member, &t->member); |
de1c301e | 636 | if (r < 0) |
2ab3a635 | 637 | return r; |
de1c301e | 638 | |
2ab3a635 | 639 | *m = TAKE_PTR(t); |
de1c301e | 640 | return 0; |
de1c301e LP |
641 | } |
642 | ||
d9f644e2 | 643 | _public_ int sd_bus_message_new_method_call( |
de1c301e | 644 | sd_bus *bus, |
151b9b96 | 645 | sd_bus_message **m, |
de1c301e LP |
646 | const char *destination, |
647 | const char *path, | |
648 | const char *interface, | |
151b9b96 | 649 | const char *member) { |
de1c301e | 650 | |
2ab3a635 | 651 | _cleanup_(message_freep) sd_bus_message *t = NULL; |
de1c301e LP |
652 | int r; |
653 | ||
2a0958d2 LP |
654 | assert_return(bus, -ENOTCONN); |
655 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
9d6c7c82 LP |
656 | assert_return(!destination || service_name_is_valid(destination), -EINVAL); |
657 | assert_return(object_path_is_valid(path), -EINVAL); | |
658 | assert_return(!interface || interface_name_is_valid(interface), -EINVAL); | |
659 | assert_return(member_name_is_valid(member), -EINVAL); | |
660 | assert_return(m, -EINVAL); | |
de1c301e | 661 | |
75bcbcf2 SA |
662 | r = sd_bus_message_new(bus, &t, SD_BUS_MESSAGE_METHOD_CALL); |
663 | if (r < 0) | |
de1c301e LP |
664 | return -ENOMEM; |
665 | ||
75bcbcf2 SA |
666 | assert(t); |
667 | ||
0461f8cd | 668 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path); |
de1c301e | 669 | if (r < 0) |
2ab3a635 | 670 | return r; |
0461f8cd | 671 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_MEMBER, SD_BUS_TYPE_STRING, member, &t->member); |
de1c301e | 672 | if (r < 0) |
2ab3a635 | 673 | return r; |
de1c301e LP |
674 | |
675 | if (interface) { | |
0461f8cd | 676 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_INTERFACE, SD_BUS_TYPE_STRING, interface, &t->interface); |
de1c301e | 677 | if (r < 0) |
2ab3a635 | 678 | return r; |
de1c301e LP |
679 | } |
680 | ||
681 | if (destination) { | |
0461f8cd | 682 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &t->destination); |
de1c301e | 683 | if (r < 0) |
2ab3a635 | 684 | return r; |
de1c301e LP |
685 | } |
686 | ||
2ab3a635 | 687 | *m = TAKE_PTR(t); |
de1c301e | 688 | return 0; |
de1c301e LP |
689 | } |
690 | ||
5407f2de | 691 | static int message_new_reply( |
de1c301e | 692 | sd_bus_message *call, |
5407f2de | 693 | uint8_t type, |
de1c301e LP |
694 | sd_bus_message **m) { |
695 | ||
2ab3a635 | 696 | _cleanup_(message_freep) sd_bus_message *t = NULL; |
f581267a | 697 | uint64_t cookie; |
de1c301e LP |
698 | int r; |
699 | ||
9d6c7c82 LP |
700 | assert_return(call, -EINVAL); |
701 | assert_return(call->sealed, -EPERM); | |
702 | assert_return(call->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); | |
2a0958d2 | 703 | assert_return(call->bus->state != BUS_UNSET, -ENOTCONN); |
9d6c7c82 | 704 | assert_return(m, -EINVAL); |
de1c301e | 705 | |
f581267a CW |
706 | cookie = BUS_MESSAGE_COOKIE(call); |
707 | if (cookie == 0) | |
708 | return -EOPNOTSUPP; | |
709 | ||
75bcbcf2 SA |
710 | r = sd_bus_message_new(call->bus, &t, type); |
711 | if (r < 0) | |
de1c301e LP |
712 | return -ENOMEM; |
713 | ||
75bcbcf2 SA |
714 | assert(t); |
715 | ||
0461f8cd | 716 | t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
f581267a | 717 | t->reply_cookie = cookie; |
b267a6d2 | 718 | r = message_append_reply_cookie(t, t->reply_cookie); |
de1c301e | 719 | if (r < 0) |
2ab3a635 | 720 | return r; |
de1c301e LP |
721 | |
722 | if (call->sender) { | |
0461f8cd | 723 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, call->sender, &t->destination); |
de1c301e | 724 | if (r < 0) |
2ab3a635 | 725 | return r; |
de1c301e LP |
726 | } |
727 | ||
0461f8cd | 728 | t->dont_send = !!(call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED); |
6717d473 | 729 | t->enforced_reply_signature = call->enforced_reply_signature; |
5407f2de | 730 | |
2ab3a635 | 731 | *m = TAKE_PTR(t); |
89ffcd2a | 732 | return 0; |
de1c301e LP |
733 | } |
734 | ||
d9f644e2 | 735 | _public_ int sd_bus_message_new_method_return( |
5407f2de LP |
736 | sd_bus_message *call, |
737 | sd_bus_message **m) { | |
738 | ||
df2d202e | 739 | return message_new_reply(call, SD_BUS_MESSAGE_METHOD_RETURN, m); |
5407f2de LP |
740 | } |
741 | ||
d9f644e2 | 742 | _public_ int sd_bus_message_new_method_error( |
de1c301e | 743 | sd_bus_message *call, |
151b9b96 LP |
744 | sd_bus_message **m, |
745 | const sd_bus_error *e) { | |
de1c301e | 746 | |
2ab3a635 | 747 | _cleanup_(message_freep) sd_bus_message *t = NULL; |
de1c301e LP |
748 | int r; |
749 | ||
9d6c7c82 LP |
750 | assert_return(sd_bus_error_is_set(e), -EINVAL); |
751 | assert_return(m, -EINVAL); | |
de1c301e | 752 | |
df2d202e | 753 | r = message_new_reply(call, SD_BUS_MESSAGE_METHOD_ERROR, &t); |
de1c301e | 754 | if (r < 0) |
5407f2de | 755 | return r; |
de1c301e | 756 | |
0461f8cd | 757 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name); |
de1c301e | 758 | if (r < 0) |
2ab3a635 | 759 | return r; |
de1c301e LP |
760 | |
761 | if (e->message) { | |
762 | r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message); | |
763 | if (r < 0) | |
2ab3a635 | 764 | return r; |
de1c301e LP |
765 | } |
766 | ||
79f8d3d2 LP |
767 | t->error._need_free = -1; |
768 | ||
2ab3a635 | 769 | *m = TAKE_PTR(t); |
de1c301e | 770 | return 0; |
de1c301e LP |
771 | } |
772 | ||
d9f644e2 | 773 | _public_ int sd_bus_message_new_method_errorf( |
29ddb38f LP |
774 | sd_bus_message *call, |
775 | sd_bus_message **m, | |
776 | const char *name, | |
777 | const char *format, | |
778 | ...) { | |
779 | ||
4afd3348 | 780 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
29ddb38f | 781 | va_list ap; |
29ddb38f | 782 | |
40ca29a1 LP |
783 | assert_return(name, -EINVAL); |
784 | assert_return(m, -EINVAL); | |
785 | ||
786 | va_start(ap, format); | |
780896a4 | 787 | bus_error_setfv(&error, name, format, ap); |
40ca29a1 | 788 | va_end(ap); |
29ddb38f | 789 | |
151b9b96 | 790 | return sd_bus_message_new_method_error(call, m, &error); |
40ca29a1 | 791 | } |
29ddb38f | 792 | |
d9f644e2 | 793 | _public_ int sd_bus_message_new_method_errno( |
40ca29a1 | 794 | sd_bus_message *call, |
151b9b96 | 795 | sd_bus_message **m, |
40ca29a1 | 796 | int error, |
151b9b96 | 797 | const sd_bus_error *p) { |
29ddb38f | 798 | |
4afd3348 | 799 | _cleanup_(sd_bus_error_free) sd_bus_error berror = SD_BUS_ERROR_NULL; |
29ddb38f | 800 | |
40ca29a1 | 801 | if (sd_bus_error_is_set(p)) |
151b9b96 | 802 | return sd_bus_message_new_method_error(call, m, p); |
29ddb38f | 803 | |
40ca29a1 | 804 | sd_bus_error_set_errno(&berror, error); |
29ddb38f | 805 | |
151b9b96 | 806 | return sd_bus_message_new_method_error(call, m, &berror); |
40ca29a1 | 807 | } |
29ddb38f | 808 | |
d9f644e2 | 809 | _public_ int sd_bus_message_new_method_errnof( |
40ca29a1 LP |
810 | sd_bus_message *call, |
811 | sd_bus_message **m, | |
812 | int error, | |
813 | const char *format, | |
814 | ...) { | |
815 | ||
4afd3348 | 816 | _cleanup_(sd_bus_error_free) sd_bus_error berror = SD_BUS_ERROR_NULL; |
40ca29a1 | 817 | va_list ap; |
40ca29a1 LP |
818 | |
819 | va_start(ap, format); | |
07a0d22f | 820 | sd_bus_error_set_errnofv(&berror, error, format, ap); |
40ca29a1 LP |
821 | va_end(ap); |
822 | ||
151b9b96 | 823 | return sd_bus_message_new_method_error(call, m, &berror); |
29ddb38f LP |
824 | } |
825 | ||
d29ae291 LP |
826 | void bus_message_set_sender_local(sd_bus *bus, sd_bus_message *m) { |
827 | assert(bus); | |
828 | assert(m); | |
829 | ||
830 | m->sender = m->creds.unique_name = (char*) "org.freedesktop.DBus.Local"; | |
831 | m->creds.well_known_names_local = true; | |
832 | m->creds.mask |= (SD_BUS_CREDS_UNIQUE_NAME|SD_BUS_CREDS_WELL_KNOWN_NAMES) & bus->creds_mask; | |
833 | } | |
834 | ||
835 | void bus_message_set_sender_driver(sd_bus *bus, sd_bus_message *m) { | |
836 | assert(bus); | |
837 | assert(m); | |
838 | ||
839 | m->sender = m->creds.unique_name = (char*) "org.freedesktop.DBus"; | |
840 | m->creds.well_known_names_driver = true; | |
841 | m->creds.mask |= (SD_BUS_CREDS_UNIQUE_NAME|SD_BUS_CREDS_WELL_KNOWN_NAMES) & bus->creds_mask; | |
842 | } | |
843 | ||
eb01ba5d LP |
844 | int bus_message_new_synthetic_error( |
845 | sd_bus *bus, | |
693eb9a2 | 846 | uint64_t cookie, |
eb01ba5d LP |
847 | const sd_bus_error *e, |
848 | sd_bus_message **m) { | |
849 | ||
2ab3a635 | 850 | _cleanup_(message_freep) sd_bus_message *t = NULL; |
eb01ba5d LP |
851 | int r; |
852 | ||
2a0958d2 | 853 | assert(bus); |
eb01ba5d LP |
854 | assert(sd_bus_error_is_set(e)); |
855 | assert(m); | |
856 | ||
75bcbcf2 SA |
857 | r = sd_bus_message_new(bus, &t, SD_BUS_MESSAGE_METHOD_ERROR); |
858 | if (r < 0) | |
eb01ba5d LP |
859 | return -ENOMEM; |
860 | ||
75bcbcf2 SA |
861 | assert(t); |
862 | ||
0461f8cd | 863 | t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
693eb9a2 | 864 | t->reply_cookie = cookie; |
eb01ba5d | 865 | |
b267a6d2 | 866 | r = message_append_reply_cookie(t, t->reply_cookie); |
eb01ba5d | 867 | if (r < 0) |
2ab3a635 | 868 | return r; |
eb01ba5d LP |
869 | |
870 | if (bus && bus->unique_name) { | |
0461f8cd | 871 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, bus->unique_name, &t->destination); |
eb01ba5d | 872 | if (r < 0) |
2ab3a635 | 873 | return r; |
eb01ba5d LP |
874 | } |
875 | ||
0461f8cd | 876 | r = message_append_field_string(t, BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name); |
3a7d4f1b | 877 | if (r < 0) |
2ab3a635 | 878 | return r; |
3a7d4f1b LP |
879 | |
880 | if (e->message) { | |
881 | r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message); | |
882 | if (r < 0) | |
2ab3a635 | 883 | return r; |
3a7d4f1b LP |
884 | } |
885 | ||
79f8d3d2 LP |
886 | t->error._need_free = -1; |
887 | ||
d29ae291 LP |
888 | bus_message_set_sender_driver(bus, t); |
889 | ||
2ab3a635 | 890 | *m = TAKE_PTR(t); |
eb01ba5d | 891 | return 0; |
eb01ba5d LP |
892 | } |
893 | ||
8301aa0b | 894 | DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_bus_message, sd_bus_message, message_free); |
de1c301e | 895 | |
d9f644e2 | 896 | _public_ int sd_bus_message_get_type(sd_bus_message *m, uint8_t *type) { |
9d6c7c82 LP |
897 | assert_return(m, -EINVAL); |
898 | assert_return(type, -EINVAL); | |
de1c301e LP |
899 | |
900 | *type = m->header->type; | |
901 | return 0; | |
902 | } | |
903 | ||
693eb9a2 | 904 | _public_ int sd_bus_message_get_cookie(sd_bus_message *m, uint64_t *cookie) { |
2ac7c17f LP |
905 | uint64_t c; |
906 | ||
9d6c7c82 | 907 | assert_return(m, -EINVAL); |
693eb9a2 | 908 | assert_return(cookie, -EINVAL); |
2ac7c17f LP |
909 | |
910 | c = BUS_MESSAGE_COOKIE(m); | |
911 | if (c == 0) | |
912 | return -ENODATA; | |
de1c301e | 913 | |
693eb9a2 | 914 | *cookie = BUS_MESSAGE_COOKIE(m); |
de1c301e LP |
915 | return 0; |
916 | } | |
917 | ||
693eb9a2 | 918 | _public_ int sd_bus_message_get_reply_cookie(sd_bus_message *m, uint64_t *cookie) { |
9d6c7c82 | 919 | assert_return(m, -EINVAL); |
693eb9a2 | 920 | assert_return(cookie, -EINVAL); |
2ac7c17f LP |
921 | |
922 | if (m->reply_cookie == 0) | |
923 | return -ENODATA; | |
de1c301e | 924 | |
693eb9a2 | 925 | *cookie = m->reply_cookie; |
de1c301e LP |
926 | return 0; |
927 | } | |
928 | ||
eee9ec0e | 929 | _public_ int sd_bus_message_get_expect_reply(sd_bus_message *m) { |
9d6c7c82 | 930 | assert_return(m, -EINVAL); |
de1c301e | 931 | |
eee9ec0e LP |
932 | return m->header->type == SD_BUS_MESSAGE_METHOD_CALL && |
933 | !(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED); | |
de1c301e LP |
934 | } |
935 | ||
eee9ec0e | 936 | _public_ int sd_bus_message_get_auto_start(sd_bus_message *m) { |
1fee9de5 LP |
937 | assert_return(m, -EINVAL); |
938 | ||
eee9ec0e | 939 | return !(m->header->flags & BUS_MESSAGE_NO_AUTO_START); |
1fee9de5 LP |
940 | } |
941 | ||
53a83f4b LP |
942 | _public_ int sd_bus_message_get_allow_interactive_authorization(sd_bus_message *m) { |
943 | assert_return(m, -EINVAL); | |
944 | ||
945 | return m->header->type == SD_BUS_MESSAGE_METHOD_CALL && | |
946 | (m->header->flags & BUS_MESSAGE_ALLOW_INTERACTIVE_AUTHORIZATION); | |
947 | } | |
948 | ||
d9f644e2 | 949 | _public_ const char *sd_bus_message_get_path(sd_bus_message *m) { |
9d6c7c82 | 950 | assert_return(m, NULL); |
de1c301e LP |
951 | |
952 | return m->path; | |
953 | } | |
954 | ||
d9f644e2 | 955 | _public_ const char *sd_bus_message_get_interface(sd_bus_message *m) { |
9d6c7c82 | 956 | assert_return(m, NULL); |
de1c301e LP |
957 | |
958 | return m->interface; | |
959 | } | |
960 | ||
d9f644e2 | 961 | _public_ const char *sd_bus_message_get_member(sd_bus_message *m) { |
9d6c7c82 | 962 | assert_return(m, NULL); |
de1c301e LP |
963 | |
964 | return m->member; | |
965 | } | |
d9f644e2 ZJS |
966 | |
967 | _public_ const char *sd_bus_message_get_destination(sd_bus_message *m) { | |
9d6c7c82 | 968 | assert_return(m, NULL); |
de1c301e LP |
969 | |
970 | return m->destination; | |
971 | } | |
972 | ||
d9f644e2 | 973 | _public_ const char *sd_bus_message_get_sender(sd_bus_message *m) { |
9d6c7c82 | 974 | assert_return(m, NULL); |
de1c301e LP |
975 | |
976 | return m->sender; | |
977 | } | |
978 | ||
d9f644e2 | 979 | _public_ const sd_bus_error *sd_bus_message_get_error(sd_bus_message *m) { |
9d6c7c82 | 980 | assert_return(m, NULL); |
f02b9615 LP |
981 | |
982 | if (!sd_bus_error_is_set(&m->error)) | |
983 | return NULL; | |
de1c301e LP |
984 | |
985 | return &m->error; | |
986 | } | |
987 | ||
1fedcf59 | 988 | _public_ int sd_bus_message_get_monotonic_usec(sd_bus_message *m, uint64_t *usec) { |
9d6c7c82 LP |
989 | assert_return(m, -EINVAL); |
990 | assert_return(usec, -EINVAL); | |
1fedcf59 LP |
991 | |
992 | if (m->monotonic <= 0) | |
993 | return -ENODATA; | |
acb5a3cb | 994 | |
69aec65c | 995 | *usec = m->monotonic; |
acb5a3cb LP |
996 | return 0; |
997 | } | |
998 | ||
1fedcf59 | 999 | _public_ int sd_bus_message_get_realtime_usec(sd_bus_message *m, uint64_t *usec) { |
9d6c7c82 LP |
1000 | assert_return(m, -EINVAL); |
1001 | assert_return(usec, -EINVAL); | |
1fedcf59 LP |
1002 | |
1003 | if (m->realtime <= 0) | |
1004 | return -ENODATA; | |
69aec65c LP |
1005 | |
1006 | *usec = m->realtime; | |
1007 | return 0; | |
1008 | } | |
1009 | ||
6a0e376c LP |
1010 | _public_ int sd_bus_message_get_seqnum(sd_bus_message *m, uint64_t *seqnum) { |
1011 | assert_return(m, -EINVAL); | |
1012 | assert_return(seqnum, -EINVAL); | |
1fedcf59 LP |
1013 | |
1014 | if (m->seqnum <= 0) | |
1015 | return -ENODATA; | |
6a0e376c LP |
1016 | |
1017 | *seqnum = m->seqnum; | |
1018 | return 0; | |
1019 | } | |
1020 | ||
5b12334d LP |
1021 | _public_ sd_bus_creds *sd_bus_message_get_creds(sd_bus_message *m) { |
1022 | assert_return(m, NULL); | |
102ea8e4 | 1023 | |
5b12334d LP |
1024 | if (m->creds.mask == 0) |
1025 | return NULL; | |
102ea8e4 | 1026 | |
5b12334d | 1027 | return &m->creds; |
102ea8e4 LP |
1028 | } |
1029 | ||
2ac7c17f LP |
1030 | _public_ int sd_bus_message_is_signal( |
1031 | sd_bus_message *m, | |
1032 | const char *interface, | |
1033 | const char *member) { | |
1034 | ||
9d6c7c82 | 1035 | assert_return(m, -EINVAL); |
de1c301e | 1036 | |
40ca29a1 | 1037 | if (m->header->type != SD_BUS_MESSAGE_SIGNAL) |
de1c301e LP |
1038 | return 0; |
1039 | ||
162c8755 | 1040 | if (interface && !streq_ptr(m->interface, interface)) |
de1c301e LP |
1041 | return 0; |
1042 | ||
162c8755 | 1043 | if (member && !streq_ptr(m->member, member)) |
de1c301e LP |
1044 | return 0; |
1045 | ||
1046 | return 1; | |
1047 | } | |
1048 | ||
2ac7c17f LP |
1049 | _public_ int sd_bus_message_is_method_call( |
1050 | sd_bus_message *m, | |
1051 | const char *interface, | |
1052 | const char *member) { | |
1053 | ||
9d6c7c82 | 1054 | assert_return(m, -EINVAL); |
de1c301e | 1055 | |
40ca29a1 | 1056 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
de1c301e LP |
1057 | return 0; |
1058 | ||
162c8755 | 1059 | if (interface && !streq_ptr(m->interface, interface)) |
de1c301e LP |
1060 | return 0; |
1061 | ||
162c8755 | 1062 | if (member && !streq_ptr(m->member, member)) |
de1c301e LP |
1063 | return 0; |
1064 | ||
1065 | return 1; | |
1066 | } | |
1067 | ||
d9f644e2 | 1068 | _public_ int sd_bus_message_is_method_error(sd_bus_message *m, const char *name) { |
9d6c7c82 | 1069 | assert_return(m, -EINVAL); |
de1c301e | 1070 | |
40ca29a1 | 1071 | if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) |
de1c301e LP |
1072 | return 0; |
1073 | ||
162c8755 | 1074 | if (name && !streq_ptr(m->error.name, name)) |
de1c301e LP |
1075 | return 0; |
1076 | ||
1077 | return 1; | |
1078 | } | |
1079 | ||
eee9ec0e | 1080 | _public_ int sd_bus_message_set_expect_reply(sd_bus_message *m, int b) { |
9d6c7c82 LP |
1081 | assert_return(m, -EINVAL); |
1082 | assert_return(!m->sealed, -EPERM); | |
1083 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EPERM); | |
de1c301e | 1084 | |
5883ff60 | 1085 | SET_FLAG(m->header->flags, BUS_MESSAGE_NO_REPLY_EXPECTED, !b); |
de1c301e LP |
1086 | |
1087 | return 0; | |
1088 | } | |
1089 | ||
eee9ec0e | 1090 | _public_ int sd_bus_message_set_auto_start(sd_bus_message *m, int b) { |
1fee9de5 LP |
1091 | assert_return(m, -EINVAL); |
1092 | assert_return(!m->sealed, -EPERM); | |
1093 | ||
5883ff60 | 1094 | SET_FLAG(m->header->flags, BUS_MESSAGE_NO_AUTO_START, !b); |
1fee9de5 LP |
1095 | |
1096 | return 0; | |
1097 | } | |
1098 | ||
53a83f4b LP |
1099 | _public_ int sd_bus_message_set_allow_interactive_authorization(sd_bus_message *m, int b) { |
1100 | assert_return(m, -EINVAL); | |
1101 | assert_return(!m->sealed, -EPERM); | |
1102 | ||
5883ff60 | 1103 | SET_FLAG(m->header->flags, BUS_MESSAGE_ALLOW_INTERACTIVE_AUTHORIZATION, b); |
53a83f4b LP |
1104 | |
1105 | return 0; | |
1106 | } | |
1107 | ||
bc7fd8cd LP |
1108 | struct bus_body_part *message_append_part(sd_bus_message *m) { |
1109 | struct bus_body_part *part; | |
1110 | ||
1111 | assert(m); | |
35460afc LP |
1112 | |
1113 | if (m->poisoned) | |
1114 | return NULL; | |
bc7fd8cd LP |
1115 | |
1116 | if (m->n_body_parts <= 0) { | |
1117 | part = &m->body; | |
1118 | zero(*part); | |
1119 | } else { | |
1120 | assert(m->body_end); | |
1121 | ||
1122 | part = new0(struct bus_body_part, 1); | |
1123 | if (!part) { | |
1124 | m->poisoned = true; | |
1125 | return NULL; | |
1126 | } | |
1127 | ||
1128 | m->body_end->next = part; | |
1129 | } | |
1130 | ||
1131 | part->memfd = -1; | |
1132 | m->body_end = part; | |
313cefa1 | 1133 | m->n_body_parts++; |
bc7fd8cd LP |
1134 | |
1135 | return part; | |
1136 | } | |
1137 | ||
1138 | static void part_zero(struct bus_body_part *part, size_t sz) { | |
1139 | assert(part); | |
1140 | assert(sz > 0); | |
1141 | assert(sz < 8); | |
1142 | ||
453a0c29 LP |
1143 | /* All other fields can be left in their defaults */ |
1144 | assert(!part->data); | |
1145 | assert(part->memfd < 0); | |
1146 | ||
bc7fd8cd | 1147 | part->size = sz; |
453a0c29 LP |
1148 | part->is_zero = true; |
1149 | part->sealed = true; | |
bc7fd8cd LP |
1150 | } |
1151 | ||
1152 | static int part_make_space( | |
1153 | struct sd_bus_message *m, | |
1154 | struct bus_body_part *part, | |
1155 | size_t sz, | |
1156 | void **q) { | |
1157 | ||
1158 | void *n; | |
bc7fd8cd LP |
1159 | |
1160 | assert(m); | |
1161 | assert(part); | |
1162 | assert(!part->sealed); | |
1163 | ||
1164 | if (m->poisoned) | |
1165 | return -ENOMEM; | |
1166 | ||
a132bef0 ZJS |
1167 | if (part->allocated == 0 || sz > part->allocated) { |
1168 | size_t new_allocated; | |
bc7fd8cd | 1169 | |
a132bef0 ZJS |
1170 | new_allocated = sz > 0 ? 2 * sz : 64; |
1171 | n = realloc(part->data, new_allocated); | |
1172 | if (!n) { | |
1173 | m->poisoned = true; | |
1174 | return -ENOMEM; | |
bc7fd8cd | 1175 | } |
bf30e48f | 1176 | |
a132bef0 ZJS |
1177 | part->data = n; |
1178 | part->allocated = new_allocated; | |
1179 | part->free_this = true; | |
bc7fd8cd LP |
1180 | } |
1181 | ||
1182 | if (q) | |
1183 | *q = part->data ? (uint8_t*) part->data + part->size : NULL; | |
1184 | ||
1185 | part->size = sz; | |
1186 | return 0; | |
1187 | } | |
1188 | ||
c1b9d935 LP |
1189 | static int message_add_offset(sd_bus_message *m, size_t offset) { |
1190 | struct bus_container *c; | |
1191 | ||
1192 | assert(m); | |
6647dc66 | 1193 | assert(BUS_MESSAGE_IS_GVARIANT(m)); |
c1b9d935 LP |
1194 | |
1195 | /* Add offset to current container, unless this is the first | |
1196 | * item in it, which will have the 0 offset, which we can | |
1197 | * ignore. */ | |
9c65778d | 1198 | c = message_get_last_container(m); |
c1b9d935 LP |
1199 | |
1200 | if (!c->need_offsets) | |
1201 | return 0; | |
1202 | ||
306f07be | 1203 | if (!GREEDY_REALLOC(c->offsets, c->offsets_allocated, c->n_offsets + 1)) |
c1b9d935 LP |
1204 | return -ENOMEM; |
1205 | ||
1206 | c->offsets[c->n_offsets++] = offset; | |
1207 | return 0; | |
1208 | } | |
1209 | ||
453a0c29 | 1210 | static void message_extend_containers(sd_bus_message *m, size_t expand) { |
de1c301e | 1211 | struct bus_container *c; |
453a0c29 LP |
1212 | |
1213 | assert(m); | |
1214 | ||
1215 | if (expand <= 0) | |
1216 | return; | |
1217 | ||
1218 | /* Update counters */ | |
c1b9d935 LP |
1219 | for (c = m->containers; c < m->containers + m->n_containers; c++) { |
1220 | ||
453a0c29 LP |
1221 | if (c->array_size) |
1222 | *c->array_size += expand; | |
c1b9d935 | 1223 | } |
453a0c29 LP |
1224 | } |
1225 | ||
2ac7c17f LP |
1226 | static void *message_extend_body( |
1227 | sd_bus_message *m, | |
1228 | size_t align, | |
1229 | size_t sz, | |
1230 | bool add_offset, | |
1231 | bool force_inline) { | |
1232 | ||
f3097697 | 1233 | size_t start_body, end_body, padding, added; |
bc7fd8cd LP |
1234 | void *p; |
1235 | int r; | |
de1c301e LP |
1236 | |
1237 | assert(m); | |
9a17484d | 1238 | assert(align > 0); |
bc7fd8cd | 1239 | assert(!m->sealed); |
35460afc LP |
1240 | |
1241 | if (m->poisoned) | |
1242 | return NULL; | |
de1c301e | 1243 | |
2ac7c17f | 1244 | start_body = ALIGN_TO((size_t) m->body_size, align); |
bc7fd8cd LP |
1245 | end_body = start_body + sz; |
1246 | ||
2ac7c17f | 1247 | padding = start_body - m->body_size; |
bc7fd8cd LP |
1248 | added = padding + sz; |
1249 | ||
1250 | /* Check for 32bit overflows */ | |
2ac7c17f LP |
1251 | if (end_body > (size_t) ((uint32_t) -1) || |
1252 | end_body < start_body) { | |
bc7fd8cd | 1253 | m->poisoned = true; |
de1c301e | 1254 | return NULL; |
bc7fd8cd | 1255 | } |
de1c301e | 1256 | |
f3097697 LP |
1257 | if (added > 0) { |
1258 | struct bus_body_part *part = NULL; | |
1259 | bool add_new_part; | |
1260 | ||
1261 | add_new_part = | |
1262 | m->n_body_parts <= 0 || | |
1263 | m->body_end->sealed || | |
2ac7c17f | 1264 | (padding != ALIGN_TO(m->body_end->size, align) - m->body_end->size) || |
0241c1c0 ZJS |
1265 | (force_inline && m->body_end->size > MEMFD_MIN_SIZE); |
1266 | /* If this must be an inlined extension, let's create a new part if | |
1267 | * the previous part is large enough to be inlined. */ | |
f3097697 LP |
1268 | |
1269 | if (add_new_part) { | |
1270 | if (padding > 0) { | |
1271 | part = message_append_part(m); | |
1272 | if (!part) | |
1273 | return NULL; | |
1274 | ||
1275 | part_zero(part, padding); | |
1276 | } | |
de1c301e | 1277 | |
bc7fd8cd LP |
1278 | part = message_append_part(m); |
1279 | if (!part) | |
1280 | return NULL; | |
1281 | ||
f3097697 LP |
1282 | r = part_make_space(m, part, sz, &p); |
1283 | if (r < 0) | |
1284 | return NULL; | |
1285 | } else { | |
1286 | struct bus_container *c; | |
1287 | void *op; | |
1288 | size_t os, start_part, end_part; | |
bc7fd8cd | 1289 | |
f3097697 LP |
1290 | part = m->body_end; |
1291 | op = part->data; | |
1292 | os = part->size; | |
bc7fd8cd | 1293 | |
f3097697 LP |
1294 | start_part = ALIGN_TO(part->size, align); |
1295 | end_part = start_part + sz; | |
bc7fd8cd | 1296 | |
f3097697 LP |
1297 | r = part_make_space(m, part, end_part, &p); |
1298 | if (r < 0) | |
1299 | return NULL; | |
bc7fd8cd | 1300 | |
f3097697 | 1301 | if (padding > 0) { |
29804cc1 | 1302 | memzero(p, padding); |
f3097697 LP |
1303 | p = (uint8_t*) p + padding; |
1304 | } | |
bc7fd8cd | 1305 | |
f3097697 LP |
1306 | /* Readjust pointers */ |
1307 | for (c = m->containers; c < m->containers + m->n_containers; c++) | |
1308 | c->array_size = adjust_pointer(c->array_size, op, os, part->data); | |
bc7fd8cd | 1309 | |
f3097697 | 1310 | m->error.message = (const char*) adjust_pointer(m->error.message, op, os, part->data); |
de1c301e | 1311 | } |
f3097697 LP |
1312 | } else |
1313 | /* Return something that is not NULL and is aligned */ | |
0241c1c0 | 1314 | p = (uint8_t*) align; |
de1c301e | 1315 | |
2ac7c17f | 1316 | m->body_size = end_body; |
453a0c29 | 1317 | message_extend_containers(m, added); |
de1c301e | 1318 | |
c1b9d935 LP |
1319 | if (add_offset) { |
1320 | r = message_add_offset(m, end_body); | |
1321 | if (r < 0) { | |
1322 | m->poisoned = true; | |
1323 | return NULL; | |
1324 | } | |
1325 | } | |
1326 | ||
de1c301e LP |
1327 | return p; |
1328 | } | |
1329 | ||
c1b9d935 LP |
1330 | static int message_push_fd(sd_bus_message *m, int fd) { |
1331 | int *f, copy; | |
1332 | ||
1333 | assert(m); | |
1334 | ||
1335 | if (fd < 0) | |
1336 | return -EINVAL; | |
1337 | ||
1338 | if (!m->allow_fds) | |
15411c0c | 1339 | return -EOPNOTSUPP; |
c1b9d935 LP |
1340 | |
1341 | copy = fcntl(fd, F_DUPFD_CLOEXEC, 3); | |
1342 | if (copy < 0) | |
1343 | return -errno; | |
1344 | ||
62d74c78 | 1345 | f = reallocarray(m->fds, sizeof(int), m->n_fds + 1); |
c1b9d935 LP |
1346 | if (!f) { |
1347 | m->poisoned = true; | |
03e334a1 | 1348 | safe_close(copy); |
c1b9d935 LP |
1349 | return -ENOMEM; |
1350 | } | |
1351 | ||
1352 | m->fds = f; | |
1353 | m->fds[m->n_fds] = copy; | |
1354 | m->free_fds = true; | |
1355 | ||
1356 | return copy; | |
1357 | } | |
1358 | ||
de1c301e | 1359 | int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored) { |
c1b9d935 | 1360 | _cleanup_close_ int fd = -1; |
de1c301e | 1361 | struct bus_container *c; |
27f6e5c7 | 1362 | ssize_t align, sz; |
de1c301e | 1363 | void *a; |
de1c301e | 1364 | |
9d6c7c82 | 1365 | assert_return(m, -EINVAL); |
9d6c7c82 LP |
1366 | assert_return(!m->sealed, -EPERM); |
1367 | assert_return(bus_type_is_basic(type), -EINVAL); | |
1368 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e | 1369 | |
9c65778d | 1370 | c = message_get_last_container(m); |
de1c301e LP |
1371 | |
1372 | if (c->signature && c->signature[c->index]) { | |
1373 | /* Container signature is already set */ | |
1374 | ||
1375 | if (c->signature[c->index] != type) | |
9a17484d | 1376 | return -ENXIO; |
de1c301e | 1377 | } else { |
5cbe7492 LP |
1378 | char *e; |
1379 | ||
ad67ef27 | 1380 | /* Maybe we can append to the signature? But only if this is the top-level container */ |
de1c301e | 1381 | if (c->enclosing != 0) |
9a17484d | 1382 | return -ENXIO; |
de1c301e LP |
1383 | |
1384 | e = strextend(&c->signature, CHAR_TO_STR(type), NULL); | |
bc7fd8cd LP |
1385 | if (!e) { |
1386 | m->poisoned = true; | |
de1c301e | 1387 | return -ENOMEM; |
bc7fd8cd | 1388 | } |
de1c301e LP |
1389 | } |
1390 | ||
6647dc66 | 1391 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 LP |
1392 | uint8_t u8; |
1393 | uint32_t u32; | |
de1c301e | 1394 | |
c1b9d935 | 1395 | switch (type) { |
cd6f997f | 1396 | |
c1b9d935 LP |
1397 | case SD_BUS_TYPE_SIGNATURE: |
1398 | case SD_BUS_TYPE_STRING: | |
1399 | p = strempty(p); | |
b8beb278 | 1400 | |
4831981d | 1401 | _fallthrough_; |
c1b9d935 LP |
1402 | case SD_BUS_TYPE_OBJECT_PATH: |
1403 | if (!p) | |
1404 | return -EINVAL; | |
cd6f997f | 1405 | |
c1b9d935 LP |
1406 | align = 1; |
1407 | sz = strlen(p) + 1; | |
1408 | break; | |
de1c301e | 1409 | |
c1b9d935 | 1410 | case SD_BUS_TYPE_BOOLEAN: |
b8beb278 | 1411 | |
c1b9d935 LP |
1412 | u8 = p && *(int*) p; |
1413 | p = &u8; | |
cd6f997f | 1414 | |
c1b9d935 LP |
1415 | align = sz = 1; |
1416 | break; | |
de1c301e | 1417 | |
c1b9d935 | 1418 | case SD_BUS_TYPE_UNIX_FD: |
b3273daf | 1419 | |
c1b9d935 LP |
1420 | if (!p) |
1421 | return -EINVAL; | |
15912917 | 1422 | |
c1b9d935 LP |
1423 | fd = message_push_fd(m, *(int*) p); |
1424 | if (fd < 0) | |
1425 | return fd; | |
de1c301e | 1426 | |
c1b9d935 LP |
1427 | u32 = m->n_fds; |
1428 | p = &u32; | |
de1c301e | 1429 | |
c1b9d935 LP |
1430 | align = sz = 4; |
1431 | break; | |
2c93b4ef | 1432 | |
c1b9d935 LP |
1433 | default: |
1434 | align = bus_gvariant_get_alignment(CHAR_TO_STR(type)); | |
6647dc66 | 1435 | sz = bus_gvariant_get_size(CHAR_TO_STR(type)); |
c1b9d935 | 1436 | break; |
15912917 KS |
1437 | } |
1438 | ||
c1b9d935 LP |
1439 | assert(align > 0); |
1440 | assert(sz > 0); | |
2c93b4ef | 1441 | |
2ac7c17f | 1442 | a = message_extend_body(m, align, sz, true, false); |
c1b9d935 LP |
1443 | if (!a) |
1444 | return -ENOMEM; | |
2c93b4ef | 1445 | |
c1b9d935 | 1446 | memcpy(a, p, sz); |
2c93b4ef | 1447 | |
c1b9d935 LP |
1448 | if (stored) |
1449 | *stored = (const uint8_t*) a; | |
2c93b4ef | 1450 | |
c1b9d935 LP |
1451 | } else { |
1452 | uint32_t u32; | |
2c93b4ef | 1453 | |
c1b9d935 | 1454 | switch (type) { |
2c93b4ef | 1455 | |
c1b9d935 LP |
1456 | case SD_BUS_TYPE_STRING: |
1457 | /* To make things easy we'll serialize a NULL string | |
1458 | * into the empty string */ | |
1459 | p = strempty(p); | |
b3273daf | 1460 | |
4831981d | 1461 | _fallthrough_; |
c1b9d935 | 1462 | case SD_BUS_TYPE_OBJECT_PATH: |
de1c301e | 1463 | |
c1b9d935 LP |
1464 | if (!p) |
1465 | return -EINVAL; | |
de1c301e | 1466 | |
c1b9d935 LP |
1467 | align = 4; |
1468 | sz = 4 + strlen(p) + 1; | |
1469 | break; | |
de1c301e | 1470 | |
c1b9d935 | 1471 | case SD_BUS_TYPE_SIGNATURE: |
de1c301e | 1472 | |
c1b9d935 | 1473 | p = strempty(p); |
de1c301e | 1474 | |
c1b9d935 LP |
1475 | align = 1; |
1476 | sz = 1 + strlen(p) + 1; | |
1477 | break; | |
de1c301e | 1478 | |
c1b9d935 | 1479 | case SD_BUS_TYPE_BOOLEAN: |
2c93b4ef | 1480 | |
c1b9d935 | 1481 | u32 = p && *(int*) p; |
6647dc66 LP |
1482 | p = &u32; |
1483 | ||
c1b9d935 LP |
1484 | align = sz = 4; |
1485 | break; | |
2c93b4ef | 1486 | |
c1b9d935 | 1487 | case SD_BUS_TYPE_UNIX_FD: |
de1c301e | 1488 | |
c1b9d935 LP |
1489 | if (!p) |
1490 | return -EINVAL; | |
de1c301e | 1491 | |
c1b9d935 LP |
1492 | fd = message_push_fd(m, *(int*) p); |
1493 | if (fd < 0) | |
1494 | return fd; | |
1495 | ||
1496 | u32 = m->n_fds; | |
1497 | p = &u32; | |
1498 | ||
1499 | align = sz = 4; | |
1500 | break; | |
1501 | ||
1502 | default: | |
1503 | align = bus_type_get_alignment(type); | |
1504 | sz = bus_type_get_size(type); | |
1505 | break; | |
1506 | } | |
1507 | ||
1508 | assert(align > 0); | |
1509 | assert(sz > 0); | |
1510 | ||
2ac7c17f | 1511 | a = message_extend_body(m, align, sz, false, false); |
c1b9d935 LP |
1512 | if (!a) |
1513 | return -ENOMEM; | |
1514 | ||
945c2931 | 1515 | if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH)) { |
c1b9d935 LP |
1516 | *(uint32_t*) a = sz - 5; |
1517 | memcpy((uint8_t*) a + 4, p, sz - 4); | |
1518 | ||
1519 | if (stored) | |
1520 | *stored = (const uint8_t*) a + 4; | |
1521 | ||
1522 | } else if (type == SD_BUS_TYPE_SIGNATURE) { | |
ec260edc | 1523 | *(uint8_t*) a = sz - 2; |
c1b9d935 LP |
1524 | memcpy((uint8_t*) a + 1, p, sz - 1); |
1525 | ||
1526 | if (stored) | |
1527 | *stored = (const uint8_t*) a + 1; | |
1528 | } else { | |
1529 | memcpy(a, p, sz); | |
1530 | ||
1531 | if (stored) | |
1532 | *stored = a; | |
1533 | } | |
de1c301e LP |
1534 | } |
1535 | ||
c1b9d935 | 1536 | if (type == SD_BUS_TYPE_UNIX_FD) |
313cefa1 | 1537 | m->n_fds++; |
c1b9d935 | 1538 | |
de1c301e | 1539 | if (c->enclosing != SD_BUS_TYPE_ARRAY) |
9a17484d | 1540 | c->index++; |
de1c301e | 1541 | |
c1b9d935 | 1542 | fd = -1; |
de1c301e LP |
1543 | return 0; |
1544 | } | |
1545 | ||
d9f644e2 | 1546 | _public_ int sd_bus_message_append_basic(sd_bus_message *m, char type, const void *p) { |
de1c301e LP |
1547 | return message_append_basic(m, type, p, NULL); |
1548 | } | |
1549 | ||
938bcbab LP |
1550 | _public_ int sd_bus_message_append_string_space( |
1551 | sd_bus_message *m, | |
1552 | size_t size, | |
1553 | char **s) { | |
1554 | ||
f8e013f8 | 1555 | struct bus_container *c; |
f8e013f8 | 1556 | void *a; |
f8e013f8 | 1557 | |
9d6c7c82 LP |
1558 | assert_return(m, -EINVAL); |
1559 | assert_return(s, -EINVAL); | |
1560 | assert_return(!m->sealed, -EPERM); | |
1561 | assert_return(!m->poisoned, -ESTALE); | |
f8e013f8 | 1562 | |
9c65778d | 1563 | c = message_get_last_container(m); |
f8e013f8 LP |
1564 | |
1565 | if (c->signature && c->signature[c->index]) { | |
1566 | /* Container signature is already set */ | |
1567 | ||
1568 | if (c->signature[c->index] != SD_BUS_TYPE_STRING) | |
1569 | return -ENXIO; | |
1570 | } else { | |
5cbe7492 LP |
1571 | char *e; |
1572 | ||
ad67ef27 | 1573 | /* Maybe we can append to the signature? But only if this is the top-level container */ |
f8e013f8 LP |
1574 | if (c->enclosing != 0) |
1575 | return -ENXIO; | |
1576 | ||
1577 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL); | |
bc7fd8cd LP |
1578 | if (!e) { |
1579 | m->poisoned = true; | |
f8e013f8 | 1580 | return -ENOMEM; |
bc7fd8cd | 1581 | } |
f8e013f8 LP |
1582 | } |
1583 | ||
6647dc66 | 1584 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f | 1585 | a = message_extend_body(m, 1, size + 1, true, false); |
c1b9d935 LP |
1586 | if (!a) |
1587 | return -ENOMEM; | |
1588 | ||
1589 | *s = a; | |
1590 | } else { | |
2ac7c17f | 1591 | a = message_extend_body(m, 4, 4 + size + 1, false, false); |
c1b9d935 LP |
1592 | if (!a) |
1593 | return -ENOMEM; | |
f8e013f8 | 1594 | |
c1b9d935 LP |
1595 | *(uint32_t*) a = size; |
1596 | *s = (char*) a + 4; | |
1597 | } | |
f8e013f8 LP |
1598 | |
1599 | (*s)[size] = 0; | |
1600 | ||
1601 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1602 | c->index++; | |
1603 | ||
1604 | return 0; | |
f8e013f8 LP |
1605 | } |
1606 | ||
938bcbab LP |
1607 | _public_ int sd_bus_message_append_string_iovec( |
1608 | sd_bus_message *m, | |
1609 | const struct iovec *iov, | |
da6053d0 | 1610 | unsigned n /* should be size_t, but is API now… 😞 */) { |
938bcbab LP |
1611 | |
1612 | size_t size; | |
1613 | unsigned i; | |
1614 | char *p; | |
1615 | int r; | |
1616 | ||
1617 | assert_return(m, -EINVAL); | |
1618 | assert_return(!m->sealed, -EPERM); | |
1619 | assert_return(iov || n == 0, -EINVAL); | |
1620 | assert_return(!m->poisoned, -ESTALE); | |
1621 | ||
1622 | size = IOVEC_TOTAL_SIZE(iov, n); | |
1623 | ||
1624 | r = sd_bus_message_append_string_space(m, size, &p); | |
1625 | if (r < 0) | |
1626 | return r; | |
1627 | ||
1628 | for (i = 0; i < n; i++) { | |
1629 | ||
1630 | if (iov[i].iov_base) | |
1631 | memcpy(p, iov[i].iov_base, iov[i].iov_len); | |
1632 | else | |
1633 | memset(p, ' ', iov[i].iov_len); | |
1634 | ||
1635 | p += iov[i].iov_len; | |
1636 | } | |
1637 | ||
1638 | return 0; | |
1639 | } | |
1640 | ||
de1c301e LP |
1641 | static int bus_message_open_array( |
1642 | sd_bus_message *m, | |
1643 | struct bus_container *c, | |
1644 | const char *contents, | |
c1b9d935 LP |
1645 | uint32_t **array_size, |
1646 | size_t *begin, | |
1647 | bool *need_offsets) { | |
de1c301e | 1648 | |
9a17484d | 1649 | unsigned nindex; |
c1b9d935 | 1650 | int alignment, r; |
de1c301e LP |
1651 | |
1652 | assert(m); | |
1653 | assert(c); | |
1654 | assert(contents); | |
1655 | assert(array_size); | |
c1b9d935 LP |
1656 | assert(begin); |
1657 | assert(need_offsets); | |
de1c301e | 1658 | |
29ddb38f | 1659 | if (!signature_is_single(contents, true)) |
de1c301e LP |
1660 | return -EINVAL; |
1661 | ||
de1c301e LP |
1662 | if (c->signature && c->signature[c->index]) { |
1663 | ||
1664 | /* Verify the existing signature */ | |
1665 | ||
1666 | if (c->signature[c->index] != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1667 | return -ENXIO; |
de1c301e LP |
1668 | |
1669 | if (!startswith(c->signature + c->index + 1, contents)) | |
9a17484d | 1670 | return -ENXIO; |
de1c301e LP |
1671 | |
1672 | nindex = c->index + 1 + strlen(contents); | |
1673 | } else { | |
5cbe7492 LP |
1674 | char *e; |
1675 | ||
de1c301e | 1676 | if (c->enclosing != 0) |
9a17484d | 1677 | return -ENXIO; |
de1c301e LP |
1678 | |
1679 | /* Extend the existing signature */ | |
1680 | ||
1681 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_ARRAY), contents, NULL); | |
bc7fd8cd LP |
1682 | if (!e) { |
1683 | m->poisoned = true; | |
de1c301e | 1684 | return -ENOMEM; |
bc7fd8cd | 1685 | } |
de1c301e LP |
1686 | |
1687 | nindex = e - c->signature; | |
1688 | } | |
1689 | ||
6647dc66 | 1690 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 LP |
1691 | alignment = bus_gvariant_get_alignment(contents); |
1692 | if (alignment < 0) | |
1693 | return alignment; | |
de1c301e | 1694 | |
c1b9d935 | 1695 | /* Add alignment padding and add to offset list */ |
2ac7c17f | 1696 | if (!message_extend_body(m, alignment, 0, false, false)) |
c1b9d935 | 1697 | return -ENOMEM; |
de1c301e | 1698 | |
c1b9d935 LP |
1699 | r = bus_gvariant_is_fixed_size(contents); |
1700 | if (r < 0) | |
1701 | return r; | |
1702 | ||
2ac7c17f | 1703 | *begin = m->body_size; |
c1b9d935 LP |
1704 | *need_offsets = r == 0; |
1705 | } else { | |
1706 | void *a, *op; | |
1707 | size_t os; | |
1708 | struct bus_body_part *o; | |
1709 | ||
1710 | alignment = bus_type_get_alignment(contents[0]); | |
1711 | if (alignment < 0) | |
1712 | return alignment; | |
1713 | ||
2ac7c17f | 1714 | a = message_extend_body(m, 4, 4, false, false); |
c1b9d935 LP |
1715 | if (!a) |
1716 | return -ENOMEM; | |
1717 | ||
1718 | o = m->body_end; | |
1719 | op = m->body_end->data; | |
1720 | os = m->body_end->size; | |
1721 | ||
1722 | /* Add alignment between size and first element */ | |
2ac7c17f | 1723 | if (!message_extend_body(m, alignment, 0, false, false)) |
c1b9d935 LP |
1724 | return -ENOMEM; |
1725 | ||
1726 | /* location of array size might have changed so let's readjust a */ | |
1727 | if (o == m->body_end) | |
1728 | a = adjust_pointer(a, op, os, m->body_end->data); | |
1729 | ||
1730 | *(uint32_t*) a = 0; | |
1731 | *array_size = a; | |
1732 | } | |
de1c301e LP |
1733 | |
1734 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1735 | c->index = nindex; | |
1736 | ||
de1c301e LP |
1737 | return 0; |
1738 | } | |
1739 | ||
1740 | static int bus_message_open_variant( | |
1741 | sd_bus_message *m, | |
1742 | struct bus_container *c, | |
1743 | const char *contents) { | |
1744 | ||
de1c301e LP |
1745 | assert(m); |
1746 | assert(c); | |
1747 | assert(contents); | |
1748 | ||
29ddb38f | 1749 | if (!signature_is_single(contents, false)) |
de1c301e LP |
1750 | return -EINVAL; |
1751 | ||
1752 | if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN) | |
1753 | return -EINVAL; | |
1754 | ||
1755 | if (c->signature && c->signature[c->index]) { | |
1756 | ||
1757 | if (c->signature[c->index] != SD_BUS_TYPE_VARIANT) | |
9a17484d | 1758 | return -ENXIO; |
de1c301e LP |
1759 | |
1760 | } else { | |
5cbe7492 LP |
1761 | char *e; |
1762 | ||
de1c301e | 1763 | if (c->enclosing != 0) |
9a17484d | 1764 | return -ENXIO; |
de1c301e LP |
1765 | |
1766 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_VARIANT), NULL); | |
bc7fd8cd LP |
1767 | if (!e) { |
1768 | m->poisoned = true; | |
de1c301e | 1769 | return -ENOMEM; |
bc7fd8cd | 1770 | } |
de1c301e LP |
1771 | } |
1772 | ||
6647dc66 | 1773 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 LP |
1774 | /* Variants are always aligned to 8 */ |
1775 | ||
2ac7c17f | 1776 | if (!message_extend_body(m, 8, 0, false, false)) |
c1b9d935 LP |
1777 | return -ENOMEM; |
1778 | ||
1779 | } else { | |
1780 | size_t l; | |
1781 | void *a; | |
de1c301e | 1782 | |
c1b9d935 | 1783 | l = strlen(contents); |
2ac7c17f | 1784 | a = message_extend_body(m, 1, 1 + l + 1, false, false); |
c1b9d935 LP |
1785 | if (!a) |
1786 | return -ENOMEM; | |
1787 | ||
1788 | *(uint8_t*) a = l; | |
1789 | memcpy((uint8_t*) a + 1, contents, l + 1); | |
1790 | } | |
de1c301e LP |
1791 | |
1792 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1793 | c->index++; |
de1c301e LP |
1794 | |
1795 | return 0; | |
1796 | } | |
1797 | ||
1798 | static int bus_message_open_struct( | |
1799 | sd_bus_message *m, | |
1800 | struct bus_container *c, | |
c1b9d935 LP |
1801 | const char *contents, |
1802 | size_t *begin, | |
1803 | bool *need_offsets) { | |
de1c301e LP |
1804 | |
1805 | size_t nindex; | |
c1b9d935 | 1806 | int r; |
de1c301e LP |
1807 | |
1808 | assert(m); | |
1809 | assert(c); | |
1810 | assert(contents); | |
c1b9d935 LP |
1811 | assert(begin); |
1812 | assert(need_offsets); | |
de1c301e LP |
1813 | |
1814 | if (!signature_is_valid(contents, false)) | |
1815 | return -EINVAL; | |
1816 | ||
1817 | if (c->signature && c->signature[c->index]) { | |
1818 | size_t l; | |
1819 | ||
1820 | l = strlen(contents); | |
1821 | ||
1822 | if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN || | |
1823 | !startswith(c->signature + c->index + 1, contents) || | |
1824 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END) | |
9a17484d | 1825 | return -ENXIO; |
de1c301e LP |
1826 | |
1827 | nindex = c->index + 1 + l + 1; | |
1828 | } else { | |
5cbe7492 LP |
1829 | char *e; |
1830 | ||
de1c301e | 1831 | if (c->enclosing != 0) |
9a17484d | 1832 | return -ENXIO; |
de1c301e LP |
1833 | |
1834 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_BEGIN), contents, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_END), NULL); | |
bc7fd8cd LP |
1835 | if (!e) { |
1836 | m->poisoned = true; | |
de1c301e | 1837 | return -ENOMEM; |
bc7fd8cd | 1838 | } |
de1c301e LP |
1839 | |
1840 | nindex = e - c->signature; | |
1841 | } | |
1842 | ||
6647dc66 | 1843 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 LP |
1844 | int alignment; |
1845 | ||
1846 | alignment = bus_gvariant_get_alignment(contents); | |
1847 | if (alignment < 0) | |
1848 | return alignment; | |
1849 | ||
2ac7c17f | 1850 | if (!message_extend_body(m, alignment, 0, false, false)) |
c1b9d935 LP |
1851 | return -ENOMEM; |
1852 | ||
1853 | r = bus_gvariant_is_fixed_size(contents); | |
1854 | if (r < 0) | |
1855 | return r; | |
1856 | ||
2ac7c17f | 1857 | *begin = m->body_size; |
c1b9d935 LP |
1858 | *need_offsets = r == 0; |
1859 | } else { | |
1860 | /* Align contents to 8 byte boundary */ | |
2ac7c17f | 1861 | if (!message_extend_body(m, 8, 0, false, false)) |
c1b9d935 LP |
1862 | return -ENOMEM; |
1863 | } | |
de1c301e LP |
1864 | |
1865 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
1866 | c->index = nindex; | |
1867 | ||
1868 | return 0; | |
1869 | } | |
1870 | ||
1871 | static int bus_message_open_dict_entry( | |
1872 | sd_bus_message *m, | |
1873 | struct bus_container *c, | |
c1b9d935 LP |
1874 | const char *contents, |
1875 | size_t *begin, | |
1876 | bool *need_offsets) { | |
de1c301e | 1877 | |
c1b9d935 | 1878 | int r; |
de1c301e LP |
1879 | |
1880 | assert(m); | |
1881 | assert(c); | |
1882 | assert(contents); | |
c1b9d935 LP |
1883 | assert(begin); |
1884 | assert(need_offsets); | |
de1c301e LP |
1885 | |
1886 | if (!signature_is_pair(contents)) | |
1887 | return -EINVAL; | |
1888 | ||
1889 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
9a17484d | 1890 | return -ENXIO; |
de1c301e LP |
1891 | |
1892 | if (c->signature && c->signature[c->index]) { | |
1893 | size_t l; | |
1894 | ||
1895 | l = strlen(contents); | |
1896 | ||
1897 | if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN || | |
1898 | !startswith(c->signature + c->index + 1, contents) || | |
1899 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END) | |
9a17484d | 1900 | return -ENXIO; |
de1c301e | 1901 | } else |
9a17484d | 1902 | return -ENXIO; |
de1c301e | 1903 | |
6647dc66 | 1904 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
c1b9d935 | 1905 | int alignment; |
de1c301e | 1906 | |
c1b9d935 LP |
1907 | alignment = bus_gvariant_get_alignment(contents); |
1908 | if (alignment < 0) | |
1909 | return alignment; | |
1910 | ||
2ac7c17f | 1911 | if (!message_extend_body(m, alignment, 0, false, false)) |
c1b9d935 LP |
1912 | return -ENOMEM; |
1913 | ||
1914 | r = bus_gvariant_is_fixed_size(contents); | |
1915 | if (r < 0) | |
1916 | return r; | |
1917 | ||
2ac7c17f | 1918 | *begin = m->body_size; |
c1b9d935 LP |
1919 | *need_offsets = r == 0; |
1920 | } else { | |
1921 | /* Align contents to 8 byte boundary */ | |
2ac7c17f | 1922 | if (!message_extend_body(m, 8, 0, false, false)) |
c1b9d935 LP |
1923 | return -ENOMEM; |
1924 | } | |
de1c301e LP |
1925 | |
1926 | return 0; | |
1927 | } | |
1928 | ||
d9f644e2 | 1929 | _public_ int sd_bus_message_open_container( |
de1c301e LP |
1930 | sd_bus_message *m, |
1931 | char type, | |
1932 | const char *contents) { | |
1933 | ||
cf81c68e | 1934 | struct bus_container *c; |
de1c301e | 1935 | uint32_t *array_size = NULL; |
7a4b8512 | 1936 | _cleanup_free_ char *signature = NULL; |
39883f62 | 1937 | size_t before, begin = 0; |
c1b9d935 | 1938 | bool need_offsets = false; |
de1c301e LP |
1939 | int r; |
1940 | ||
9d6c7c82 LP |
1941 | assert_return(m, -EINVAL); |
1942 | assert_return(!m->sealed, -EPERM); | |
1943 | assert_return(contents, -EINVAL); | |
1944 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e LP |
1945 | |
1946 | /* Make sure we have space for one more container */ | |
306f07be | 1947 | if (!GREEDY_REALLOC(m->containers, m->containers_allocated, m->n_containers + 1)) { |
bc7fd8cd | 1948 | m->poisoned = true; |
de1c301e | 1949 | return -ENOMEM; |
bc7fd8cd LP |
1950 | } |
1951 | ||
9c65778d | 1952 | c = message_get_last_container(m); |
de1c301e LP |
1953 | |
1954 | signature = strdup(contents); | |
bc7fd8cd LP |
1955 | if (!signature) { |
1956 | m->poisoned = true; | |
de1c301e | 1957 | return -ENOMEM; |
bc7fd8cd | 1958 | } |
de1c301e | 1959 | |
b3af9646 LP |
1960 | /* Save old index in the parent container, in case we have to |
1961 | * abort this container */ | |
1962 | c->saved_index = c->index; | |
2ac7c17f | 1963 | before = m->body_size; |
b3af9646 | 1964 | |
de1c301e | 1965 | if (type == SD_BUS_TYPE_ARRAY) |
c1b9d935 | 1966 | r = bus_message_open_array(m, c, contents, &array_size, &begin, &need_offsets); |
de1c301e LP |
1967 | else if (type == SD_BUS_TYPE_VARIANT) |
1968 | r = bus_message_open_variant(m, c, contents); | |
1969 | else if (type == SD_BUS_TYPE_STRUCT) | |
c1b9d935 | 1970 | r = bus_message_open_struct(m, c, contents, &begin, &need_offsets); |
de1c301e | 1971 | else if (type == SD_BUS_TYPE_DICT_ENTRY) |
c1b9d935 | 1972 | r = bus_message_open_dict_entry(m, c, contents, &begin, &need_offsets); |
de1c301e LP |
1973 | else |
1974 | r = -EINVAL; | |
7a4b8512 | 1975 | if (r < 0) |
de1c301e | 1976 | return r; |
de1c301e LP |
1977 | |
1978 | /* OK, let's fill it in */ | |
cf81c68e ZJS |
1979 | m->containers[m->n_containers++] = (struct bus_container) { |
1980 | .enclosing = type, | |
1981 | .signature = TAKE_PTR(signature), | |
1982 | .array_size = array_size, | |
1983 | .before = before, | |
1984 | .begin = begin, | |
1985 | .need_offsets = need_offsets, | |
1986 | }; | |
c1b9d935 LP |
1987 | |
1988 | return 0; | |
1989 | } | |
1990 | ||
1991 | static int bus_message_close_array(sd_bus_message *m, struct bus_container *c) { | |
1992 | ||
1993 | assert(m); | |
1994 | assert(c); | |
1995 | ||
6647dc66 | 1996 | if (!BUS_MESSAGE_IS_GVARIANT(m)) |
c1b9d935 LP |
1997 | return 0; |
1998 | ||
1999 | if (c->need_offsets) { | |
6647dc66 | 2000 | size_t payload, sz, i; |
c1b9d935 | 2001 | uint8_t *a; |
c1b9d935 LP |
2002 | |
2003 | /* Variable-width arrays */ | |
2004 | ||
6647dc66 | 2005 | payload = c->n_offsets > 0 ? c->offsets[c->n_offsets-1] - c->begin : 0; |
2ac7c17f | 2006 | sz = bus_gvariant_determine_word_size(payload, c->n_offsets); |
c1b9d935 | 2007 | |
2ac7c17f | 2008 | a = message_extend_body(m, 1, sz * c->n_offsets, true, false); |
6647dc66 LP |
2009 | if (!a) |
2010 | return -ENOMEM; | |
c1b9d935 | 2011 | |
6647dc66 | 2012 | for (i = 0; i < c->n_offsets; i++) |
2ac7c17f | 2013 | bus_gvariant_write_word_le(a + sz*i, sz, c->offsets[i] - c->begin); |
c1b9d935 LP |
2014 | } else { |
2015 | void *a; | |
2016 | ||
2017 | /* Fixed-width or empty arrays */ | |
2018 | ||
2ac7c17f | 2019 | a = message_extend_body(m, 1, 0, true, false); /* let's add offset to parent */ |
c1b9d935 LP |
2020 | if (!a) |
2021 | return -ENOMEM; | |
2022 | } | |
2023 | ||
2024 | return 0; | |
2025 | } | |
2026 | ||
2027 | static int bus_message_close_variant(sd_bus_message *m, struct bus_container *c) { | |
2028 | uint8_t *a; | |
2029 | size_t l; | |
2030 | ||
2031 | assert(m); | |
2032 | assert(c); | |
3e49a3a0 | 2033 | assert(c->signature); |
c1b9d935 | 2034 | |
6647dc66 | 2035 | if (!BUS_MESSAGE_IS_GVARIANT(m)) |
c1b9d935 LP |
2036 | return 0; |
2037 | ||
2038 | l = strlen(c->signature); | |
2039 | ||
2ac7c17f | 2040 | a = message_extend_body(m, 1, 1 + l, true, false); |
c1b9d935 LP |
2041 | if (!a) |
2042 | return -ENOMEM; | |
2043 | ||
2044 | a[0] = 0; | |
2045 | memcpy(a+1, c->signature, l); | |
2046 | ||
2047 | return 0; | |
2048 | } | |
2049 | ||
2050 | static int bus_message_close_struct(sd_bus_message *m, struct bus_container *c, bool add_offset) { | |
443a5598 | 2051 | bool fixed_size = true; |
c1b9d935 LP |
2052 | size_t n_variable = 0; |
2053 | unsigned i = 0; | |
2054 | const char *p; | |
2055 | uint8_t *a; | |
2056 | int r; | |
2057 | ||
2058 | assert(m); | |
2059 | assert(c); | |
2060 | ||
6647dc66 | 2061 | if (!BUS_MESSAGE_IS_GVARIANT(m)) |
c1b9d935 LP |
2062 | return 0; |
2063 | ||
d6385068 | 2064 | p = strempty(c->signature); |
c1b9d935 LP |
2065 | while (*p != 0) { |
2066 | size_t n; | |
2067 | ||
2068 | r = signature_element_length(p, &n); | |
2069 | if (r < 0) | |
2070 | return r; | |
2071 | else { | |
2072 | char t[n+1]; | |
2073 | ||
2074 | memcpy(t, p, n); | |
2075 | t[n] = 0; | |
2076 | ||
2077 | r = bus_gvariant_is_fixed_size(t); | |
2078 | if (r < 0) | |
2079 | return r; | |
2080 | } | |
2081 | ||
8f19720d | 2082 | assert(!c->need_offsets || i <= c->n_offsets); |
c1b9d935 LP |
2083 | |
2084 | /* We need to add an offset for each item that has a | |
2085 | * variable size and that is not the last one in the | |
2086 | * list */ | |
443a5598 DH |
2087 | if (r == 0) |
2088 | fixed_size = false; | |
c1b9d935 LP |
2089 | if (r == 0 && p[n] != 0) |
2090 | n_variable++; | |
c1b9d935 LP |
2091 | |
2092 | i++; | |
2093 | p += n; | |
2094 | } | |
2095 | ||
8f19720d LP |
2096 | assert(!c->need_offsets || i == c->n_offsets); |
2097 | assert(c->need_offsets || n_variable == 0); | |
6647dc66 | 2098 | |
e53d21d0 DH |
2099 | if (isempty(c->signature)) { |
2100 | /* The unary type is encoded as fixed 1 byte padding */ | |
2101 | a = message_extend_body(m, 1, 1, add_offset, false); | |
2102 | if (!a) | |
2103 | return -ENOMEM; | |
2104 | ||
2105 | *a = 0; | |
2106 | } else if (n_variable <= 0) { | |
443a5598 DH |
2107 | int alignment = 1; |
2108 | ||
2109 | /* Structures with fixed-size members only have to be | |
2110 | * fixed-size themselves. But gvariant requires all fixed-size | |
2111 | * elements to be sized a multiple of their alignment. Hence, | |
2112 | * we must *always* add final padding after the last member so | |
2113 | * the overall size of the structure is properly aligned. */ | |
2114 | if (fixed_size) | |
2115 | alignment = bus_gvariant_get_alignment(strempty(c->signature)); | |
2116 | ||
2117 | assert(alignment > 0); | |
2118 | ||
2119 | a = message_extend_body(m, alignment, 0, add_offset, false); | |
c1b9d935 LP |
2120 | if (!a) |
2121 | return -ENOMEM; | |
2122 | } else { | |
6647dc66 | 2123 | size_t sz; |
c1b9d935 LP |
2124 | unsigned j; |
2125 | ||
2ac7c17f | 2126 | assert(c->offsets[c->n_offsets-1] == m->body_size); |
c1b9d935 | 2127 | |
2ac7c17f | 2128 | sz = bus_gvariant_determine_word_size(m->body_size - c->begin, n_variable); |
c1b9d935 | 2129 | |
2ac7c17f | 2130 | a = message_extend_body(m, 1, sz * n_variable, add_offset, false); |
c1b9d935 LP |
2131 | if (!a) |
2132 | return -ENOMEM; | |
2133 | ||
d6385068 | 2134 | p = strempty(c->signature); |
c1b9d935 | 2135 | for (i = 0, j = 0; i < c->n_offsets; i++) { |
c1b9d935 | 2136 | unsigned k; |
6647dc66 LP |
2137 | size_t n; |
2138 | ||
2139 | r = signature_element_length(p, &n); | |
2140 | if (r < 0) | |
2141 | return r; | |
2142 | else { | |
2143 | char t[n+1]; | |
2144 | ||
2145 | memcpy(t, p, n); | |
2146 | t[n] = 0; | |
2147 | ||
2148 | p += n; | |
c1b9d935 | 2149 | |
6647dc66 LP |
2150 | r = bus_gvariant_is_fixed_size(t); |
2151 | if (r < 0) | |
2152 | return r; | |
2153 | if (r > 0 || p[0] == 0) | |
2154 | continue; | |
2155 | } | |
c1b9d935 | 2156 | |
c1b9d935 LP |
2157 | k = n_variable - 1 - j; |
2158 | ||
2ac7c17f | 2159 | bus_gvariant_write_word_le(a + k * sz, sz, c->offsets[i] - c->begin); |
c1b9d935 LP |
2160 | |
2161 | j++; | |
2162 | } | |
2163 | } | |
de1c301e LP |
2164 | |
2165 | return 0; | |
2166 | } | |
2167 | ||
d9f644e2 | 2168 | _public_ int sd_bus_message_close_container(sd_bus_message *m) { |
de1c301e | 2169 | struct bus_container *c; |
c1b9d935 | 2170 | int r; |
de1c301e | 2171 | |
9d6c7c82 LP |
2172 | assert_return(m, -EINVAL); |
2173 | assert_return(!m->sealed, -EPERM); | |
2174 | assert_return(m->n_containers > 0, -EINVAL); | |
2175 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e | 2176 | |
9c65778d | 2177 | c = message_get_last_container(m); |
c1b9d935 | 2178 | |
de1c301e | 2179 | if (c->enclosing != SD_BUS_TYPE_ARRAY) |
9a17484d | 2180 | if (c->signature && c->signature[c->index] != 0) |
de1c301e LP |
2181 | return -EINVAL; |
2182 | ||
de1c301e LP |
2183 | m->n_containers--; |
2184 | ||
c1b9d935 LP |
2185 | if (c->enclosing == SD_BUS_TYPE_ARRAY) |
2186 | r = bus_message_close_array(m, c); | |
2187 | else if (c->enclosing == SD_BUS_TYPE_VARIANT) | |
2188 | r = bus_message_close_variant(m, c); | |
945c2931 | 2189 | else if (IN_SET(c->enclosing, SD_BUS_TYPE_STRUCT, SD_BUS_TYPE_DICT_ENTRY)) |
c1b9d935 LP |
2190 | r = bus_message_close_struct(m, c, true); |
2191 | else | |
2192 | assert_not_reached("Unknown container type"); | |
2193 | ||
2194 | free(c->signature); | |
6647dc66 LP |
2195 | free(c->offsets); |
2196 | ||
c1b9d935 | 2197 | return r; |
de1c301e LP |
2198 | } |
2199 | ||
1b492614 LP |
2200 | typedef struct { |
2201 | const char *types; | |
2202 | unsigned n_struct; | |
2203 | unsigned n_array; | |
2204 | } TypeStack; | |
2205 | ||
2206 | static int type_stack_push(TypeStack *stack, unsigned max, unsigned *i, const char *types, unsigned n_struct, unsigned n_array) { | |
2207 | assert(stack); | |
2208 | assert(max > 0); | |
2209 | ||
2210 | if (*i >= max) | |
2211 | return -EINVAL; | |
2212 | ||
2213 | stack[*i].types = types; | |
2214 | stack[*i].n_struct = n_struct; | |
2215 | stack[*i].n_array = n_array; | |
2216 | (*i)++; | |
2217 | ||
2218 | return 0; | |
2219 | } | |
2220 | ||
2221 | static int type_stack_pop(TypeStack *stack, unsigned max, unsigned *i, const char **types, unsigned *n_struct, unsigned *n_array) { | |
2222 | assert(stack); | |
2223 | assert(max > 0); | |
2224 | assert(types); | |
2225 | assert(n_struct); | |
2226 | assert(n_array); | |
2227 | ||
2228 | if (*i <= 0) | |
2229 | return 0; | |
2230 | ||
2231 | (*i)--; | |
2232 | *types = stack[*i].types; | |
2233 | *n_struct = stack[*i].n_struct; | |
2234 | *n_array = stack[*i].n_array; | |
2235 | ||
2236 | return 1; | |
2237 | } | |
2238 | ||
19fe49f6 | 2239 | _public_ int sd_bus_message_appendv( |
de1c301e LP |
2240 | sd_bus_message *m, |
2241 | const char *types, | |
2242 | va_list ap) { | |
2243 | ||
1b492614 LP |
2244 | unsigned n_array, n_struct; |
2245 | TypeStack stack[BUS_CONTAINER_DEPTH]; | |
2246 | unsigned stack_ptr = 0; | |
de1c301e LP |
2247 | int r; |
2248 | ||
19fe49f6 FDP |
2249 | assert_return(m, -EINVAL); |
2250 | assert_return(types, -EINVAL); | |
2251 | assert_return(!m->sealed, -EPERM); | |
2252 | assert_return(!m->poisoned, -ESTALE); | |
de1c301e | 2253 | |
1b492614 LP |
2254 | n_array = (unsigned) -1; |
2255 | n_struct = strlen(types); | |
2256 | ||
2257 | for (;;) { | |
2258 | const char *t; | |
2259 | ||
2260 | if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) { | |
2261 | r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array); | |
2262 | if (r < 0) | |
2263 | return r; | |
2264 | if (r == 0) | |
2265 | break; | |
2266 | ||
2267 | r = sd_bus_message_close_container(m); | |
2268 | if (r < 0) | |
2269 | return r; | |
2270 | ||
2271 | continue; | |
2272 | } | |
2273 | ||
2274 | t = types; | |
2275 | if (n_array != (unsigned) -1) | |
313cefa1 | 2276 | n_array--; |
1b492614 | 2277 | else { |
313cefa1 | 2278 | types++; |
1b492614 LP |
2279 | n_struct--; |
2280 | } | |
2281 | ||
de1c301e LP |
2282 | switch (*t) { |
2283 | ||
2284 | case SD_BUS_TYPE_BYTE: { | |
2285 | uint8_t x; | |
2286 | ||
2287 | x = (uint8_t) va_arg(ap, int); | |
2288 | r = sd_bus_message_append_basic(m, *t, &x); | |
2289 | break; | |
2290 | } | |
2291 | ||
2292 | case SD_BUS_TYPE_BOOLEAN: | |
2293 | case SD_BUS_TYPE_INT32: | |
9a17484d LP |
2294 | case SD_BUS_TYPE_UINT32: |
2295 | case SD_BUS_TYPE_UNIX_FD: { | |
de1c301e LP |
2296 | uint32_t x; |
2297 | ||
9a17484d LP |
2298 | /* We assume a boolean is the same as int32_t */ |
2299 | assert_cc(sizeof(int32_t) == sizeof(int)); | |
2300 | ||
de1c301e LP |
2301 | x = va_arg(ap, uint32_t); |
2302 | r = sd_bus_message_append_basic(m, *t, &x); | |
2303 | break; | |
2304 | } | |
2305 | ||
2306 | case SD_BUS_TYPE_INT16: | |
2307 | case SD_BUS_TYPE_UINT16: { | |
2308 | uint16_t x; | |
2309 | ||
2310 | x = (uint16_t) va_arg(ap, int); | |
2311 | r = sd_bus_message_append_basic(m, *t, &x); | |
2312 | break; | |
2313 | } | |
2314 | ||
2315 | case SD_BUS_TYPE_INT64: | |
6cd37a5e | 2316 | case SD_BUS_TYPE_UINT64: { |
de1c301e LP |
2317 | uint64_t x; |
2318 | ||
2319 | x = va_arg(ap, uint64_t); | |
2320 | r = sd_bus_message_append_basic(m, *t, &x); | |
2321 | break; | |
2322 | } | |
2323 | ||
6cd37a5e LP |
2324 | case SD_BUS_TYPE_DOUBLE: { |
2325 | double x; | |
2326 | ||
2327 | x = va_arg(ap, double); | |
2328 | r = sd_bus_message_append_basic(m, *t, &x); | |
2329 | break; | |
2330 | } | |
2331 | ||
de1c301e LP |
2332 | case SD_BUS_TYPE_STRING: |
2333 | case SD_BUS_TYPE_OBJECT_PATH: | |
2334 | case SD_BUS_TYPE_SIGNATURE: { | |
2335 | const char *x; | |
2336 | ||
2337 | x = va_arg(ap, const char*); | |
2338 | r = sd_bus_message_append_basic(m, *t, x); | |
2339 | break; | |
2340 | } | |
2341 | ||
de1c301e | 2342 | case SD_BUS_TYPE_ARRAY: { |
de1c301e LP |
2343 | size_t k; |
2344 | ||
2345 | r = signature_element_length(t + 1, &k); | |
2346 | if (r < 0) | |
2347 | return r; | |
2348 | ||
2349 | { | |
2350 | char s[k + 1]; | |
de1c301e LP |
2351 | memcpy(s, t + 1, k); |
2352 | s[k] = 0; | |
de1c301e LP |
2353 | |
2354 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, s); | |
2355 | if (r < 0) | |
2356 | return r; | |
1b492614 | 2357 | } |
de1c301e | 2358 | |
1b492614 LP |
2359 | if (n_array == (unsigned) -1) { |
2360 | types += k; | |
2361 | n_struct -= k; | |
de1c301e LP |
2362 | } |
2363 | ||
1b492614 LP |
2364 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
2365 | if (r < 0) | |
2366 | return r; | |
2367 | ||
2368 | types = t + 1; | |
2369 | n_struct = k; | |
2370 | n_array = va_arg(ap, unsigned); | |
2371 | ||
de1c301e LP |
2372 | break; |
2373 | } | |
2374 | ||
2375 | case SD_BUS_TYPE_VARIANT: { | |
2376 | const char *s; | |
2377 | ||
2378 | s = va_arg(ap, const char*); | |
2379 | if (!s) | |
2380 | return -EINVAL; | |
2381 | ||
2382 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_VARIANT, s); | |
2383 | if (r < 0) | |
2384 | return r; | |
2385 | ||
1b492614 | 2386 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
de1c301e LP |
2387 | if (r < 0) |
2388 | return r; | |
2389 | ||
1b492614 LP |
2390 | types = s; |
2391 | n_struct = strlen(s); | |
2392 | n_array = (unsigned) -1; | |
2393 | ||
de1c301e LP |
2394 | break; |
2395 | } | |
2396 | ||
2397 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
2398 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
2399 | size_t k; | |
2400 | ||
2401 | r = signature_element_length(t, &k); | |
2402 | if (r < 0) | |
2403 | return r; | |
2404 | ||
2405 | { | |
2406 | char s[k - 1]; | |
2407 | ||
2408 | memcpy(s, t + 1, k - 2); | |
2409 | s[k - 2] = 0; | |
2410 | ||
2411 | r = sd_bus_message_open_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
2412 | if (r < 0) | |
2413 | return r; | |
1b492614 | 2414 | } |
de1c301e | 2415 | |
1b492614 LP |
2416 | if (n_array == (unsigned) -1) { |
2417 | types += k - 1; | |
2418 | n_struct -= k - 1; | |
2419 | } | |
de1c301e | 2420 | |
1b492614 LP |
2421 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
2422 | if (r < 0) | |
2423 | return r; | |
de1c301e | 2424 | |
1b492614 LP |
2425 | types = t + 1; |
2426 | n_struct = k - 2; | |
2427 | n_array = (unsigned) -1; | |
de1c301e LP |
2428 | |
2429 | break; | |
2430 | } | |
2431 | ||
2432 | default: | |
2433 | r = -EINVAL; | |
2434 | } | |
2435 | ||
2436 | if (r < 0) | |
2437 | return r; | |
2438 | } | |
2439 | ||
ebcf1f97 | 2440 | return 1; |
de1c301e LP |
2441 | } |
2442 | ||
d9f644e2 | 2443 | _public_ int sd_bus_message_append(sd_bus_message *m, const char *types, ...) { |
de1c301e LP |
2444 | va_list ap; |
2445 | int r; | |
2446 | ||
de1c301e | 2447 | va_start(ap, types); |
19fe49f6 | 2448 | r = sd_bus_message_appendv(m, types, ap); |
de1c301e LP |
2449 | va_end(ap); |
2450 | ||
2451 | return r; | |
2452 | } | |
2453 | ||
c1b9d935 LP |
2454 | _public_ int sd_bus_message_append_array_space( |
2455 | sd_bus_message *m, | |
2456 | char type, | |
2457 | size_t size, | |
2458 | void **ptr) { | |
2459 | ||
b3af9646 LP |
2460 | ssize_t align, sz; |
2461 | void *a; | |
2462 | int r; | |
2463 | ||
9d6c7c82 LP |
2464 | assert_return(m, -EINVAL); |
2465 | assert_return(!m->sealed, -EPERM); | |
0039a203 | 2466 | assert_return(bus_type_is_trivial(type) && type != SD_BUS_TYPE_BOOLEAN, -EINVAL); |
9d6c7c82 LP |
2467 | assert_return(ptr || size == 0, -EINVAL); |
2468 | assert_return(!m->poisoned, -ESTALE); | |
b3af9646 | 2469 | |
0039a203 LP |
2470 | /* alignment and size of the trivial types (except bool) is |
2471 | * identical for gvariant and dbus1 marshalling */ | |
b3af9646 LP |
2472 | align = bus_type_get_alignment(type); |
2473 | sz = bus_type_get_size(type); | |
2474 | ||
2475 | assert_se(align > 0); | |
2476 | assert_se(sz > 0); | |
2477 | ||
2478 | if (size % sz != 0) | |
2479 | return -EINVAL; | |
2480 | ||
2481 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
2482 | if (r < 0) | |
2483 | return r; | |
2484 | ||
2ac7c17f | 2485 | a = message_extend_body(m, align, size, false, false); |
bc7fd8cd LP |
2486 | if (!a) |
2487 | return -ENOMEM; | |
b3af9646 LP |
2488 | |
2489 | r = sd_bus_message_close_container(m); | |
2490 | if (r < 0) | |
bc7fd8cd | 2491 | return r; |
b3af9646 LP |
2492 | |
2493 | *ptr = a; | |
2494 | return 0; | |
b3af9646 LP |
2495 | } |
2496 | ||
7dcd79c2 LP |
2497 | _public_ int sd_bus_message_append_array( |
2498 | sd_bus_message *m, | |
2499 | char type, | |
2500 | const void *ptr, | |
2501 | size_t size) { | |
b3af9646 LP |
2502 | int r; |
2503 | void *p; | |
2504 | ||
9d6c7c82 LP |
2505 | assert_return(m, -EINVAL); |
2506 | assert_return(!m->sealed, -EPERM); | |
2507 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
2508 | assert_return(ptr || size == 0, -EINVAL); | |
2509 | assert_return(!m->poisoned, -ESTALE); | |
b3af9646 | 2510 | |
f8e013f8 | 2511 | r = sd_bus_message_append_array_space(m, type, size, &p); |
b3af9646 LP |
2512 | if (r < 0) |
2513 | return r; | |
2514 | ||
75f32f04 | 2515 | memcpy_safe(p, ptr, size); |
b3af9646 LP |
2516 | |
2517 | return 0; | |
2518 | } | |
2519 | ||
938bcbab LP |
2520 | _public_ int sd_bus_message_append_array_iovec( |
2521 | sd_bus_message *m, | |
2522 | char type, | |
2523 | const struct iovec *iov, | |
da6053d0 | 2524 | unsigned n /* should be size_t, but is API now… 😞 */) { |
938bcbab LP |
2525 | |
2526 | size_t size; | |
2527 | unsigned i; | |
2528 | void *p; | |
2529 | int r; | |
2530 | ||
2531 | assert_return(m, -EINVAL); | |
2532 | assert_return(!m->sealed, -EPERM); | |
2533 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
2534 | assert_return(iov || n == 0, -EINVAL); | |
2535 | assert_return(!m->poisoned, -ESTALE); | |
2536 | ||
2537 | size = IOVEC_TOTAL_SIZE(iov, n); | |
2538 | ||
2539 | r = sd_bus_message_append_array_space(m, type, size, &p); | |
2540 | if (r < 0) | |
2541 | return r; | |
2542 | ||
2543 | for (i = 0; i < n; i++) { | |
2544 | ||
2545 | if (iov[i].iov_base) | |
2546 | memcpy(p, iov[i].iov_base, iov[i].iov_len); | |
2547 | else | |
29804cc1 | 2548 | memzero(p, iov[i].iov_len); |
938bcbab LP |
2549 | |
2550 | p = (uint8_t*) p + iov[i].iov_len; | |
2551 | } | |
2552 | ||
2553 | return 0; | |
2554 | } | |
2555 | ||
7dcd79c2 LP |
2556 | _public_ int sd_bus_message_append_array_memfd( |
2557 | sd_bus_message *m, | |
2558 | char type, | |
2559 | int memfd, | |
2560 | uint64_t offset, | |
2561 | uint64_t size) { | |
2562 | ||
453a0c29 LP |
2563 | _cleanup_close_ int copy_fd = -1; |
2564 | struct bus_body_part *part; | |
2565 | ssize_t align, sz; | |
7dcd79c2 | 2566 | uint64_t real_size; |
453a0c29 LP |
2567 | void *a; |
2568 | int r; | |
2569 | ||
7dcd79c2 | 2570 | assert_return(m, -EINVAL); |
8ac43fee | 2571 | assert_return(memfd >= 0, -EBADF); |
7dcd79c2 LP |
2572 | assert_return(bus_type_is_trivial(type), -EINVAL); |
2573 | assert_return(size > 0, -EINVAL); | |
2574 | assert_return(!m->sealed, -EPERM); | |
2575 | assert_return(!m->poisoned, -ESTALE); | |
453a0c29 | 2576 | |
fac9c0d5 | 2577 | r = memfd_set_sealed(memfd); |
453a0c29 LP |
2578 | if (r < 0) |
2579 | return r; | |
2580 | ||
40164c2c | 2581 | copy_fd = fcntl(memfd, F_DUPFD_CLOEXEC, 3); |
453a0c29 LP |
2582 | if (copy_fd < 0) |
2583 | return copy_fd; | |
2584 | ||
7dcd79c2 | 2585 | r = memfd_get_size(memfd, &real_size); |
453a0c29 LP |
2586 | if (r < 0) |
2587 | return r; | |
2588 | ||
7dcd79c2 LP |
2589 | if (offset == 0 && size == (uint64_t) -1) |
2590 | size = real_size; | |
2591 | else if (offset + size > real_size) | |
2592 | return -EMSGSIZE; | |
2593 | ||
453a0c29 LP |
2594 | align = bus_type_get_alignment(type); |
2595 | sz = bus_type_get_size(type); | |
2596 | ||
2597 | assert_se(align > 0); | |
2598 | assert_se(sz > 0); | |
2599 | ||
7dcd79c2 LP |
2600 | if (offset % align != 0) |
2601 | return -EINVAL; | |
2602 | ||
453a0c29 LP |
2603 | if (size % sz != 0) |
2604 | return -EINVAL; | |
2605 | ||
5cbe7492 | 2606 | if (size > (uint64_t) (uint32_t) -1) |
453a0c29 LP |
2607 | return -EINVAL; |
2608 | ||
2609 | r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); | |
2610 | if (r < 0) | |
2611 | return r; | |
2612 | ||
2ac7c17f | 2613 | a = message_extend_body(m, align, 0, false, false); |
453a0c29 LP |
2614 | if (!a) |
2615 | return -ENOMEM; | |
2616 | ||
2617 | part = message_append_part(m); | |
2618 | if (!part) | |
2619 | return -ENOMEM; | |
2620 | ||
2621 | part->memfd = copy_fd; | |
7dcd79c2 | 2622 | part->memfd_offset = offset; |
453a0c29 LP |
2623 | part->sealed = true; |
2624 | part->size = size; | |
2625 | copy_fd = -1; | |
2626 | ||
2ac7c17f | 2627 | m->body_size += size; |
0039a203 | 2628 | message_extend_containers(m, size); |
453a0c29 LP |
2629 | |
2630 | return sd_bus_message_close_container(m); | |
2631 | } | |
2632 | ||
7dcd79c2 LP |
2633 | _public_ int sd_bus_message_append_string_memfd( |
2634 | sd_bus_message *m, | |
2635 | int memfd, | |
2636 | uint64_t offset, | |
2637 | uint64_t size) { | |
2638 | ||
5cbe7492 LP |
2639 | _cleanup_close_ int copy_fd = -1; |
2640 | struct bus_body_part *part; | |
2641 | struct bus_container *c; | |
7dcd79c2 | 2642 | uint64_t real_size; |
5cbe7492 LP |
2643 | void *a; |
2644 | int r; | |
2645 | ||
55736ed0 | 2646 | assert_return(m, -EINVAL); |
8ac43fee | 2647 | assert_return(memfd >= 0, -EBADF); |
7dcd79c2 | 2648 | assert_return(size > 0, -EINVAL); |
55736ed0 LP |
2649 | assert_return(!m->sealed, -EPERM); |
2650 | assert_return(!m->poisoned, -ESTALE); | |
5cbe7492 | 2651 | |
fac9c0d5 | 2652 | r = memfd_set_sealed(memfd); |
5cbe7492 LP |
2653 | if (r < 0) |
2654 | return r; | |
2655 | ||
40164c2c | 2656 | copy_fd = fcntl(memfd, FD_CLOEXEC, 3); |
5cbe7492 LP |
2657 | if (copy_fd < 0) |
2658 | return copy_fd; | |
2659 | ||
7dcd79c2 | 2660 | r = memfd_get_size(memfd, &real_size); |
5cbe7492 LP |
2661 | if (r < 0) |
2662 | return r; | |
2663 | ||
7dcd79c2 LP |
2664 | if (offset == 0 && size == (uint64_t) -1) |
2665 | size = real_size; | |
2666 | else if (offset + size > real_size) | |
2667 | return -EMSGSIZE; | |
2668 | ||
5cbe7492 LP |
2669 | /* We require this to be NUL terminated */ |
2670 | if (size == 0) | |
2671 | return -EINVAL; | |
2672 | ||
2673 | if (size > (uint64_t) (uint32_t) -1) | |
2674 | return -EINVAL; | |
2675 | ||
9c65778d | 2676 | c = message_get_last_container(m); |
5cbe7492 LP |
2677 | if (c->signature && c->signature[c->index]) { |
2678 | /* Container signature is already set */ | |
2679 | ||
2680 | if (c->signature[c->index] != SD_BUS_TYPE_STRING) | |
2681 | return -ENXIO; | |
2682 | } else { | |
2683 | char *e; | |
2684 | ||
ad67ef27 | 2685 | /* Maybe we can append to the signature? But only if this is the top-level container */ |
5cbe7492 LP |
2686 | if (c->enclosing != 0) |
2687 | return -ENXIO; | |
2688 | ||
2689 | e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL); | |
2690 | if (!e) { | |
2691 | m->poisoned = true; | |
2692 | return -ENOMEM; | |
2693 | } | |
2694 | } | |
2695 | ||
6647dc66 | 2696 | if (!BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f | 2697 | a = message_extend_body(m, 4, 4, false, false); |
c1b9d935 LP |
2698 | if (!a) |
2699 | return -ENOMEM; | |
5cbe7492 | 2700 | |
c1b9d935 LP |
2701 | *(uint32_t*) a = size - 1; |
2702 | } | |
5cbe7492 LP |
2703 | |
2704 | part = message_append_part(m); | |
2705 | if (!part) | |
2706 | return -ENOMEM; | |
2707 | ||
2708 | part->memfd = copy_fd; | |
7dcd79c2 | 2709 | part->memfd_offset = offset; |
5cbe7492 LP |
2710 | part->sealed = true; |
2711 | part->size = size; | |
2712 | copy_fd = -1; | |
2713 | ||
2ac7c17f | 2714 | m->body_size += size; |
c1b9d935 LP |
2715 | message_extend_containers(m, size); |
2716 | ||
6647dc66 | 2717 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f | 2718 | r = message_add_offset(m, m->body_size); |
c1b9d935 LP |
2719 | if (r < 0) { |
2720 | m->poisoned = true; | |
2721 | return -ENOMEM; | |
2722 | } | |
2723 | } | |
5cbe7492 LP |
2724 | |
2725 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
2726 | c->index++; | |
2727 | ||
2728 | return 0; | |
2729 | } | |
2730 | ||
d9f644e2 | 2731 | _public_ int sd_bus_message_append_strv(sd_bus_message *m, char **l) { |
55736ed0 LP |
2732 | char **i; |
2733 | int r; | |
2734 | ||
2735 | assert_return(m, -EINVAL); | |
2736 | assert_return(!m->sealed, -EPERM); | |
2737 | assert_return(!m->poisoned, -ESTALE); | |
2738 | ||
2739 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2740 | if (r < 0) | |
2741 | return r; | |
2742 | ||
2743 | STRV_FOREACH(i, l) { | |
2744 | r = sd_bus_message_append_basic(m, 's', *i); | |
2745 | if (r < 0) | |
2746 | return r; | |
2747 | } | |
2748 | ||
2749 | return sd_bus_message_close_container(m); | |
2750 | } | |
2751 | ||
81389225 | 2752 | static int bus_message_close_header(sd_bus_message *m) { |
81389225 LP |
2753 | |
2754 | assert(m); | |
2755 | ||
2ac7c17f LP |
2756 | /* The actual user data is finished now, we just complete the |
2757 | variant and struct now (at least on gvariant). Remember | |
61233823 | 2758 | this position, so that during parsing we know where to |
2ac7c17f LP |
2759 | put the outer container end. */ |
2760 | m->user_body_size = m->body_size; | |
81389225 | 2761 | |
2ac7c17f LP |
2762 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2763 | const char *signature; | |
2764 | size_t sz, l; | |
2765 | void *d; | |
b381de41 | 2766 | |
2ac7c17f LP |
2767 | /* Add offset table to end of fields array */ |
2768 | if (m->n_header_offsets >= 1) { | |
2769 | uint8_t *a; | |
2770 | unsigned i; | |
b381de41 | 2771 | |
2ac7c17f | 2772 | assert(m->fields_size == m->header_offsets[m->n_header_offsets-1]); |
b381de41 | 2773 | |
2ac7c17f LP |
2774 | sz = bus_gvariant_determine_word_size(m->fields_size, m->n_header_offsets); |
2775 | a = message_extend_fields(m, 1, sz * m->n_header_offsets, false); | |
2776 | if (!a) | |
2777 | return -ENOMEM; | |
2778 | ||
2779 | for (i = 0; i < m->n_header_offsets; i++) | |
2780 | bus_gvariant_write_word_le(a + sz*i, sz, m->header_offsets[i]); | |
2781 | } | |
2782 | ||
2783 | /* Add gvariant NUL byte plus signature to the end of | |
2784 | * the body, followed by the final offset pointing to | |
2785 | * the end of the fields array */ | |
b381de41 | 2786 | |
2ac7c17f LP |
2787 | signature = strempty(m->root_container.signature); |
2788 | l = strlen(signature); | |
2789 | ||
03ebf5e8 DH |
2790 | sz = bus_gvariant_determine_word_size(sizeof(struct bus_header) + ALIGN8(m->fields_size) + m->body_size + 1 + l + 2, 1); |
2791 | d = message_extend_body(m, 1, 1 + l + 2 + sz, false, true); | |
2ac7c17f LP |
2792 | if (!d) |
2793 | return -ENOMEM; | |
2794 | ||
2795 | *(uint8_t*) d = 0; | |
03ebf5e8 DH |
2796 | *((uint8_t*) d + 1) = SD_BUS_TYPE_STRUCT_BEGIN; |
2797 | memcpy((uint8_t*) d + 2, signature, l); | |
2798 | *((uint8_t*) d + 1 + l + 1) = SD_BUS_TYPE_STRUCT_END; | |
2ac7c17f | 2799 | |
03ebf5e8 | 2800 | bus_gvariant_write_word_le((uint8_t*) d + 1 + l + 2, sz, sizeof(struct bus_header) + m->fields_size); |
2ac7c17f LP |
2801 | |
2802 | m->footer = d; | |
03ebf5e8 | 2803 | m->footer_accessible = 1 + l + 2 + sz; |
2ac7c17f LP |
2804 | } else { |
2805 | m->header->dbus1.fields_size = m->fields_size; | |
2806 | m->header->dbus1.body_size = m->body_size; | |
2807 | } | |
81389225 LP |
2808 | |
2809 | return 0; | |
2810 | } | |
2811 | ||
75bcbcf2 | 2812 | _public_ int sd_bus_message_seal(sd_bus_message *m, uint64_t cookie, uint64_t timeout_usec) { |
81389225 | 2813 | struct bus_body_part *part; |
2ac7c17f | 2814 | size_t a; |
81389225 LP |
2815 | unsigned i; |
2816 | int r; | |
2817 | ||
75bcbcf2 | 2818 | assert_return(m, -EINVAL); |
81389225 LP |
2819 | |
2820 | if (m->sealed) | |
2821 | return -EPERM; | |
2822 | ||
2823 | if (m->n_containers > 0) | |
2824 | return -EBADMSG; | |
2825 | ||
2826 | if (m->poisoned) | |
2827 | return -ESTALE; | |
2828 | ||
2ac7c17f LP |
2829 | if (cookie > 0xffffffffULL && |
2830 | !BUS_MESSAGE_IS_GVARIANT(m)) | |
15411c0c | 2831 | return -EOPNOTSUPP; |
2ac7c17f | 2832 | |
81389225 LP |
2833 | /* In vtables the return signature of method calls is listed, |
2834 | * let's check if they match if this is a response */ | |
2835 | if (m->header->type == SD_BUS_MESSAGE_METHOD_RETURN && | |
2836 | m->enforced_reply_signature && | |
2837 | !streq(strempty(m->root_container.signature), m->enforced_reply_signature)) | |
2838 | return -ENOMSG; | |
2839 | ||
2840 | /* If gvariant marshalling is used we need to close the body structure */ | |
2841 | r = bus_message_close_struct(m, &m->root_container, false); | |
2842 | if (r < 0) | |
2843 | return r; | |
2844 | ||
2ac7c17f LP |
2845 | /* If there's a non-trivial signature set, then add it in |
2846 | * here, but only on dbus1 */ | |
2847 | if (!isempty(m->root_container.signature) && !BUS_MESSAGE_IS_GVARIANT(m)) { | |
81389225 LP |
2848 | r = message_append_field_signature(m, BUS_MESSAGE_HEADER_SIGNATURE, m->root_container.signature, NULL); |
2849 | if (r < 0) | |
2850 | return r; | |
2851 | } | |
2852 | ||
2853 | if (m->n_fds > 0) { | |
2854 | r = message_append_field_uint32(m, BUS_MESSAGE_HEADER_UNIX_FDS, m->n_fds); | |
2855 | if (r < 0) | |
2856 | return r; | |
2857 | } | |
2858 | ||
2859 | r = bus_message_close_header(m); | |
2860 | if (r < 0) | |
2861 | return r; | |
2862 | ||
2ac7c17f LP |
2863 | if (BUS_MESSAGE_IS_GVARIANT(m)) |
2864 | m->header->dbus2.cookie = cookie; | |
2865 | else | |
2866 | m->header->dbus1.serial = (uint32_t) cookie; | |
2867 | ||
75bcbcf2 | 2868 | m->timeout = m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED ? 0 : timeout_usec; |
81389225 LP |
2869 | |
2870 | /* Add padding at the end of the fields part, since we know | |
2871 | * the body needs to start at an 8 byte alignment. We made | |
2872 | * sure we allocated enough space for this, so all we need to | |
2873 | * do here is to zero it out. */ | |
2ac7c17f | 2874 | a = ALIGN8(m->fields_size) - m->fields_size; |
81389225 | 2875 | if (a > 0) |
2ac7c17f | 2876 | memzero((uint8_t*) BUS_MESSAGE_FIELDS(m) + m->fields_size, a); |
81389225 LP |
2877 | |
2878 | /* If this is something we can send as memfd, then let's seal | |
2879 | the memfd now. Note that we can send memfds as payload only | |
2880 | for directed messages, and not for broadcasts. */ | |
2a0958d2 | 2881 | if (m->destination && m->bus->use_memfd) { |
81389225 | 2882 | MESSAGE_FOREACH_PART(part, i, m) |
2ac7c17f LP |
2883 | if (part->memfd >= 0 && |
2884 | !part->sealed && | |
2885 | (part->size > MEMFD_MIN_SIZE || m->bus->use_memfd < 0) && | |
2886 | part != m->body_end) { /* The last part may never be sent as memfd */ | |
8e959fbf LP |
2887 | uint64_t sz; |
2888 | ||
2889 | /* Try to seal it if that makes | |
2890 | * sense. First, unmap our own map to | |
2891 | * make sure we don't keep it busy. */ | |
81389225 LP |
2892 | bus_body_part_unmap(part); |
2893 | ||
8e959fbf LP |
2894 | /* Then, sync up real memfd size */ |
2895 | sz = part->size; | |
73843b52 LP |
2896 | r = memfd_set_size(part->memfd, sz); |
2897 | if (r < 0) | |
2898 | return r; | |
8e959fbf LP |
2899 | |
2900 | /* Finally, try to seal */ | |
73843b52 | 2901 | if (memfd_set_sealed(part->memfd) >= 0) |
81389225 LP |
2902 | part->sealed = true; |
2903 | } | |
2904 | } | |
2905 | ||
2ac7c17f | 2906 | m->root_container.end = m->user_body_size; |
81389225 LP |
2907 | m->root_container.index = 0; |
2908 | m->root_container.offset_index = 0; | |
2909 | m->root_container.item_size = m->root_container.n_offsets > 0 ? m->root_container.offsets[0] : 0; | |
2910 | ||
2911 | m->sealed = true; | |
2912 | ||
2913 | return 0; | |
2914 | } | |
2915 | ||
a392d361 | 2916 | int bus_body_part_map(struct bus_body_part *part) { |
453a0c29 | 2917 | void *p; |
7dcd79c2 | 2918 | size_t psz, shift; |
453a0c29 LP |
2919 | |
2920 | assert_se(part); | |
2921 | ||
2922 | if (part->data) | |
2923 | return 0; | |
2924 | ||
2925 | if (part->size <= 0) | |
2926 | return 0; | |
2927 | ||
1307c3ff LP |
2928 | /* For smaller zero parts (as used for padding) we don't need to map anything... */ |
2929 | if (part->memfd < 0 && part->is_zero && part->size < 8) { | |
2930 | static const uint8_t zeroes[7] = { }; | |
2931 | part->data = (void*) zeroes; | |
2932 | return 0; | |
2933 | } | |
2934 | ||
7dcd79c2 LP |
2935 | shift = part->memfd_offset - ((part->memfd_offset / page_size()) * page_size()); |
2936 | psz = PAGE_ALIGN(part->size + shift); | |
453a0c29 LP |
2937 | |
2938 | if (part->memfd >= 0) | |
7dcd79c2 | 2939 | p = mmap(NULL, psz, PROT_READ, MAP_PRIVATE, part->memfd, part->memfd_offset - shift); |
453a0c29 LP |
2940 | else if (part->is_zero) |
2941 | p = mmap(NULL, psz, PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
2942 | else | |
2943 | return -EINVAL; | |
2944 | ||
2945 | if (p == MAP_FAILED) | |
2946 | return -errno; | |
2947 | ||
2948 | part->mapped = psz; | |
7dcd79c2 LP |
2949 | part->mmap_begin = p; |
2950 | part->data = (uint8_t*) p + shift; | |
a392d361 LP |
2951 | part->munmap_this = true; |
2952 | ||
453a0c29 LP |
2953 | return 0; |
2954 | } | |
2955 | ||
a392d361 LP |
2956 | void bus_body_part_unmap(struct bus_body_part *part) { |
2957 | ||
2958 | assert_se(part); | |
2959 | ||
2960 | if (part->memfd < 0) | |
2961 | return; | |
2962 | ||
7dcd79c2 | 2963 | if (!part->mmap_begin) |
a392d361 LP |
2964 | return; |
2965 | ||
bf30e48f KS |
2966 | if (!part->munmap_this) |
2967 | return; | |
a392d361 | 2968 | |
7dcd79c2 | 2969 | assert_se(munmap(part->mmap_begin, part->mapped) == 0); |
a392d361 | 2970 | |
7dcd79c2 | 2971 | part->mmap_begin = NULL; |
a392d361 LP |
2972 | part->data = NULL; |
2973 | part->mapped = 0; | |
2974 | part->munmap_this = false; | |
2975 | ||
2976 | return; | |
2977 | } | |
2978 | ||
9a17484d | 2979 | static int buffer_peek(const void *p, uint32_t sz, size_t *rindex, size_t align, size_t nbytes, void **r) { |
bc7fd8cd | 2980 | size_t k, start, end; |
de1c301e | 2981 | |
9a17484d LP |
2982 | assert(rindex); |
2983 | assert(align > 0); | |
de1c301e | 2984 | |
9a17484d | 2985 | start = ALIGN_TO((size_t) *rindex, align); |
bc7fd8cd | 2986 | end = start + nbytes; |
9a17484d | 2987 | |
bc7fd8cd | 2988 | if (end > sz) |
9a17484d LP |
2989 | return -EBADMSG; |
2990 | ||
2991 | /* Verify that padding is 0 */ | |
2992 | for (k = *rindex; k < start; k++) | |
2993 | if (((const uint8_t*) p)[k] != 0) | |
2994 | return -EBADMSG; | |
2995 | ||
2996 | if (r) | |
2997 | *r = (uint8_t*) p + start; | |
2998 | ||
bc7fd8cd | 2999 | *rindex = end; |
9a17484d LP |
3000 | |
3001 | return 1; | |
de1c301e LP |
3002 | } |
3003 | ||
7b058942 LP |
3004 | static bool message_end_of_signature(sd_bus_message *m) { |
3005 | struct bus_container *c; | |
3006 | ||
3007 | assert(m); | |
3008 | ||
9c65778d | 3009 | c = message_get_last_container(m); |
7b058942 LP |
3010 | return !c->signature || c->signature[c->index] == 0; |
3011 | } | |
3012 | ||
9a17484d LP |
3013 | static bool message_end_of_array(sd_bus_message *m, size_t index) { |
3014 | struct bus_container *c; | |
de1c301e | 3015 | |
9a17484d | 3016 | assert(m); |
de1c301e | 3017 | |
9c65778d | 3018 | c = message_get_last_container(m); |
6647dc66 | 3019 | if (c->enclosing != SD_BUS_TYPE_ARRAY) |
9a17484d | 3020 | return false; |
de1c301e | 3021 | |
6647dc66 LP |
3022 | if (BUS_MESSAGE_IS_GVARIANT(m)) |
3023 | return index >= c->end; | |
3024 | else { | |
3025 | assert(c->array_size); | |
3026 | return index >= c->begin + BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
3027 | } | |
de1c301e LP |
3028 | } |
3029 | ||
1405bef3 | 3030 | _public_ int sd_bus_message_at_end(sd_bus_message *m, int complete) { |
7b058942 LP |
3031 | assert_return(m, -EINVAL); |
3032 | assert_return(m->sealed, -EPERM); | |
3033 | ||
3034 | if (complete && m->n_containers > 0) | |
3035 | return false; | |
3036 | ||
3037 | if (message_end_of_signature(m)) | |
3038 | return true; | |
3039 | ||
3040 | if (message_end_of_array(m, m->rindex)) | |
3041 | return true; | |
3042 | ||
3043 | return false; | |
3044 | } | |
3045 | ||
bc7fd8cd LP |
3046 | static struct bus_body_part* find_part(sd_bus_message *m, size_t index, size_t sz, void **p) { |
3047 | struct bus_body_part *part; | |
3048 | size_t begin; | |
453a0c29 LP |
3049 | int r; |
3050 | ||
bc7fd8cd LP |
3051 | assert(m); |
3052 | ||
3053 | if (m->cached_rindex_part && index >= m->cached_rindex_part_begin) { | |
3054 | part = m->cached_rindex_part; | |
3055 | begin = m->cached_rindex_part_begin; | |
3056 | } else { | |
3057 | part = &m->body; | |
3058 | begin = 0; | |
3059 | } | |
3060 | ||
3061 | while (part) { | |
3062 | if (index < begin) | |
3063 | return NULL; | |
3064 | ||
3065 | if (index + sz <= begin + part->size) { | |
453a0c29 | 3066 | |
a392d361 | 3067 | r = bus_body_part_map(part); |
453a0c29 LP |
3068 | if (r < 0) |
3069 | return NULL; | |
3070 | ||
bc7fd8cd | 3071 | if (p) |
453a0c29 | 3072 | *p = (uint8_t*) part->data + index - begin; |
bc7fd8cd LP |
3073 | |
3074 | m->cached_rindex_part = part; | |
3075 | m->cached_rindex_part_begin = begin; | |
3076 | ||
3077 | return part; | |
3078 | } | |
3079 | ||
453a0c29 | 3080 | begin += part->size; |
bc7fd8cd LP |
3081 | part = part->next; |
3082 | } | |
3083 | ||
3084 | return NULL; | |
3085 | } | |
3086 | ||
6647dc66 LP |
3087 | static int container_next_item(sd_bus_message *m, struct bus_container *c, size_t *rindex) { |
3088 | int r; | |
3089 | ||
3090 | assert(m); | |
3091 | assert(c); | |
3092 | assert(rindex); | |
3093 | ||
3094 | if (!BUS_MESSAGE_IS_GVARIANT(m)) | |
3095 | return 0; | |
3096 | ||
3097 | if (c->enclosing == SD_BUS_TYPE_ARRAY) { | |
3098 | int sz; | |
3099 | ||
3100 | sz = bus_gvariant_get_size(c->signature); | |
3101 | if (sz < 0) { | |
3102 | int alignment; | |
3103 | ||
3104 | if (c->offset_index+1 >= c->n_offsets) | |
3105 | goto end; | |
3106 | ||
3107 | /* Variable-size array */ | |
3108 | ||
3109 | alignment = bus_gvariant_get_alignment(c->signature); | |
3110 | assert(alignment > 0); | |
3111 | ||
3112 | *rindex = ALIGN_TO(c->offsets[c->offset_index], alignment); | |
12603b84 | 3113 | assert(c->offsets[c->offset_index+1] >= *rindex); |
6647dc66 LP |
3114 | c->item_size = c->offsets[c->offset_index+1] - *rindex; |
3115 | } else { | |
0039a203 LP |
3116 | |
3117 | if (c->offset_index+1 >= (c->end-c->begin)/sz) | |
3118 | goto end; | |
3119 | ||
6647dc66 | 3120 | /* Fixed-size array */ |
0039a203 | 3121 | *rindex = c->begin + (c->offset_index+1) * sz; |
6647dc66 LP |
3122 | c->item_size = sz; |
3123 | } | |
3124 | ||
3125 | c->offset_index++; | |
3126 | ||
945c2931 | 3127 | } else if (IN_SET(c->enclosing, 0, SD_BUS_TYPE_STRUCT, SD_BUS_TYPE_DICT_ENTRY)) { |
6647dc66 LP |
3128 | |
3129 | int alignment; | |
3130 | size_t n, j; | |
3131 | ||
3132 | if (c->offset_index+1 >= c->n_offsets) | |
3133 | goto end; | |
3134 | ||
3135 | r = signature_element_length(c->signature + c->index, &n); | |
3136 | if (r < 0) | |
3137 | return r; | |
3138 | ||
3139 | r = signature_element_length(c->signature + c->index + n, &j); | |
3140 | if (r < 0) | |
3141 | return r; | |
3142 | else { | |
3143 | char t[j+1]; | |
3144 | memcpy(t, c->signature + c->index + n, j); | |
3145 | t[j] = 0; | |
3146 | ||
3147 | alignment = bus_gvariant_get_alignment(t); | |
3148 | } | |
3149 | ||
3150 | assert(alignment > 0); | |
3151 | ||
3152 | *rindex = ALIGN_TO(c->offsets[c->offset_index], alignment); | |
12603b84 | 3153 | assert(c->offsets[c->offset_index+1] >= *rindex); |
6647dc66 LP |
3154 | c->item_size = c->offsets[c->offset_index+1] - *rindex; |
3155 | ||
3156 | c->offset_index++; | |
3157 | ||
3158 | } else if (c->enclosing == SD_BUS_TYPE_VARIANT) | |
3159 | goto end; | |
3160 | else | |
3161 | assert_not_reached("Unknown container type"); | |
3162 | ||
3163 | return 0; | |
3164 | ||
3165 | end: | |
3166 | /* Reached the end */ | |
3167 | *rindex = c->end; | |
3168 | c->item_size = 0; | |
3169 | return 0; | |
3170 | } | |
3171 | ||
bc7fd8cd LP |
3172 | static int message_peek_body( |
3173 | sd_bus_message *m, | |
3174 | size_t *rindex, | |
3175 | size_t align, | |
3176 | size_t nbytes, | |
3177 | void **ret) { | |
3178 | ||
3179 | size_t k, start, end, padding; | |
3180 | struct bus_body_part *part; | |
3181 | uint8_t *q; | |
3182 | ||
de1c301e | 3183 | assert(m); |
9a17484d LP |
3184 | assert(rindex); |
3185 | assert(align > 0); | |
de1c301e | 3186 | |
bc7fd8cd LP |
3187 | start = ALIGN_TO((size_t) *rindex, align); |
3188 | padding = start - *rindex; | |
3189 | end = start + nbytes; | |
3190 | ||
2ac7c17f | 3191 | if (end > m->user_body_size) |
bc7fd8cd LP |
3192 | return -EBADMSG; |
3193 | ||
3194 | part = find_part(m, *rindex, padding, (void**) &q); | |
3195 | if (!part) | |
3196 | return -EBADMSG; | |
3197 | ||
3198 | if (q) { | |
3199 | /* Verify padding */ | |
3200 | for (k = 0; k < padding; k++) | |
3201 | if (q[k] != 0) | |
3202 | return -EBADMSG; | |
3203 | } | |
3204 | ||
3205 | part = find_part(m, start, nbytes, (void**) &q); | |
5f7e8903 | 3206 | if (!part || (nbytes > 0 && !q)) |
bc7fd8cd LP |
3207 | return -EBADMSG; |
3208 | ||
3209 | *rindex = end; | |
3210 | ||
3211 | if (ret) | |
3212 | *ret = q; | |
3213 | ||
18f5b48f | 3214 | return 0; |
9a17484d | 3215 | } |
de1c301e | 3216 | |
ac89bf1d | 3217 | static bool validate_nul(const char *s, size_t l) { |
de1c301e | 3218 | |
9a17484d LP |
3219 | /* Check for NUL chars in the string */ |
3220 | if (memchr(s, 0, l)) | |
3221 | return false; | |
de1c301e | 3222 | |
9a17484d LP |
3223 | /* Check for NUL termination */ |
3224 | if (s[l] != 0) | |
3225 | return false; | |
de1c301e | 3226 | |
ac89bf1d LP |
3227 | return true; |
3228 | } | |
3229 | ||
3230 | static bool validate_string(const char *s, size_t l) { | |
3231 | ||
3232 | if (!validate_nul(s, l)) | |
3233 | return false; | |
3234 | ||
9a17484d LP |
3235 | /* Check if valid UTF8 */ |
3236 | if (!utf8_is_valid(s)) | |
3237 | return false; | |
3238 | ||
3239 | return true; | |
de1c301e LP |
3240 | } |
3241 | ||
9a17484d | 3242 | static bool validate_signature(const char *s, size_t l) { |
de1c301e | 3243 | |
ac89bf1d | 3244 | if (!validate_nul(s, l)) |
9a17484d | 3245 | return false; |
de1c301e | 3246 | |
9a17484d LP |
3247 | /* Check if valid signature */ |
3248 | if (!signature_is_valid(s, true)) | |
3249 | return false; | |
3250 | ||
3251 | return true; | |
3252 | } | |
3253 | ||
ac89bf1d LP |
3254 | static bool validate_object_path(const char *s, size_t l) { |
3255 | ||
3256 | if (!validate_nul(s, l)) | |
3257 | return false; | |
3258 | ||
3259 | if (!object_path_is_valid(s)) | |
3260 | return false; | |
3261 | ||
3262 | return true; | |
3263 | } | |
3264 | ||
d9f644e2 | 3265 | _public_ int sd_bus_message_read_basic(sd_bus_message *m, char type, void *p) { |
9a17484d | 3266 | struct bus_container *c; |
6647dc66 | 3267 | size_t rindex; |
9a17484d | 3268 | void *q; |
0dcd14b9 | 3269 | int r; |
9a17484d | 3270 | |
9d6c7c82 LP |
3271 | assert_return(m, -EINVAL); |
3272 | assert_return(m->sealed, -EPERM); | |
3273 | assert_return(bus_type_is_basic(type), -EINVAL); | |
de1c301e | 3274 | |
7b058942 | 3275 | if (message_end_of_signature(m)) |
430fb8fa | 3276 | return -ENXIO; |
9a17484d | 3277 | |
1daf8121 LP |
3278 | if (message_end_of_array(m, m->rindex)) |
3279 | return 0; | |
3280 | ||
9c65778d | 3281 | c = message_get_last_container(m); |
9a17484d LP |
3282 | if (c->signature[c->index] != type) |
3283 | return -ENXIO; | |
3284 | ||
6647dc66 | 3285 | rindex = m->rindex; |
9a17484d | 3286 | |
6647dc66 | 3287 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
9a17484d | 3288 | |
6647dc66 LP |
3289 | if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE)) { |
3290 | bool ok; | |
9a17484d | 3291 | |
81b6e630 ZJS |
3292 | /* D-Bus spec: The marshalling formats for the string-like types all end |
3293 | * with a single zero (NUL) byte, but that byte is not considered to be part | |
3294 | * of the text. */ | |
3295 | if (c->item_size == 0) | |
3296 | return -EBADMSG; | |
3297 | ||
6647dc66 | 3298 | r = message_peek_body(m, &rindex, 1, c->item_size, &q); |
18f5b48f | 3299 | if (r < 0) |
6647dc66 LP |
3300 | return r; |
3301 | ||
3302 | if (type == SD_BUS_TYPE_STRING) | |
3303 | ok = validate_string(q, c->item_size-1); | |
3304 | else if (type == SD_BUS_TYPE_OBJECT_PATH) | |
3305 | ok = validate_object_path(q, c->item_size-1); | |
3306 | else | |
3307 | ok = validate_signature(q, c->item_size-1); | |
9a17484d | 3308 | |
6647dc66 | 3309 | if (!ok) |
ac89bf1d | 3310 | return -EBADMSG; |
6647dc66 LP |
3311 | |
3312 | if (p) | |
3313 | *(const char**) p = q; | |
ac89bf1d | 3314 | } else { |
6647dc66 LP |
3315 | int sz, align; |
3316 | ||
3317 | sz = bus_gvariant_get_size(CHAR_TO_STR(type)); | |
3318 | assert(sz > 0); | |
3319 | if ((size_t) sz != c->item_size) | |
ac89bf1d | 3320 | return -EBADMSG; |
9a17484d | 3321 | |
6647dc66 LP |
3322 | align = bus_gvariant_get_alignment(CHAR_TO_STR(type)); |
3323 | assert(align > 0); | |
0dcd14b9 | 3324 | |
6647dc66 | 3325 | r = message_peek_body(m, &rindex, align, c->item_size, &q); |
18f5b48f | 3326 | if (r < 0) |
6647dc66 | 3327 | return r; |
de1c301e | 3328 | |
6647dc66 | 3329 | switch (type) { |
9a17484d | 3330 | |
6647dc66 LP |
3331 | case SD_BUS_TYPE_BYTE: |
3332 | if (p) | |
3333 | *(uint8_t*) p = *(uint8_t*) q; | |
3334 | break; | |
9a17484d | 3335 | |
6647dc66 LP |
3336 | case SD_BUS_TYPE_BOOLEAN: |
3337 | if (p) | |
3338 | *(int*) p = !!*(uint8_t*) q; | |
3339 | break; | |
9a17484d | 3340 | |
6647dc66 LP |
3341 | case SD_BUS_TYPE_INT16: |
3342 | case SD_BUS_TYPE_UINT16: | |
3343 | if (p) | |
3344 | *(uint16_t*) p = BUS_MESSAGE_BSWAP16(m, *(uint16_t*) q); | |
3345 | break; | |
3346 | ||
3347 | case SD_BUS_TYPE_INT32: | |
3348 | case SD_BUS_TYPE_UINT32: | |
3349 | if (p) | |
3350 | *(uint32_t*) p = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3351 | break; | |
9a17484d | 3352 | |
6647dc66 LP |
3353 | case SD_BUS_TYPE_INT64: |
3354 | case SD_BUS_TYPE_UINT64: | |
3355 | case SD_BUS_TYPE_DOUBLE: | |
3356 | if (p) | |
3357 | *(uint64_t*) p = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q); | |
3358 | break; | |
0dcd14b9 | 3359 | |
6647dc66 LP |
3360 | case SD_BUS_TYPE_UNIX_FD: { |
3361 | uint32_t j; | |
de1c301e | 3362 | |
6647dc66 LP |
3363 | j = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); |
3364 | if (j >= m->n_fds) | |
3365 | return -EBADMSG; | |
de1c301e | 3366 | |
6647dc66 LP |
3367 | if (p) |
3368 | *(int*) p = m->fds[j]; | |
de1c301e | 3369 | |
6647dc66 LP |
3370 | break; |
3371 | } | |
3372 | ||
3373 | default: | |
3374 | assert_not_reached("unexpected type"); | |
3375 | } | |
3376 | } | |
3377 | ||
3378 | r = container_next_item(m, c, &rindex); | |
3379 | if (r < 0) | |
9a17484d | 3380 | return r; |
6647dc66 | 3381 | } else { |
9a17484d | 3382 | |
6647dc66 LP |
3383 | if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH)) { |
3384 | uint32_t l; | |
3385 | bool ok; | |
9a17484d | 3386 | |
6647dc66 | 3387 | r = message_peek_body(m, &rindex, 4, 4, &q); |
18f5b48f | 3388 | if (r < 0) |
6647dc66 | 3389 | return r; |
9a17484d | 3390 | |
6647dc66 | 3391 | l = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); |
902000c1 ZJS |
3392 | if (l == UINT32_MAX) |
3393 | /* avoid overflow right below */ | |
3394 | return -EBADMSG; | |
3395 | ||
6647dc66 LP |
3396 | r = message_peek_body(m, &rindex, 1, l+1, &q); |
3397 | if (r < 0) | |
3398 | return r; | |
9a17484d | 3399 | |
6647dc66 LP |
3400 | if (type == SD_BUS_TYPE_OBJECT_PATH) |
3401 | ok = validate_object_path(q, l); | |
3402 | else | |
3403 | ok = validate_string(q, l); | |
3404 | if (!ok) | |
3405 | return -EBADMSG; | |
9a17484d | 3406 | |
0dcd14b9 | 3407 | if (p) |
6647dc66 | 3408 | *(const char**) p = q; |
9a17484d | 3409 | |
6647dc66 LP |
3410 | } else if (type == SD_BUS_TYPE_SIGNATURE) { |
3411 | uint8_t l; | |
3412 | ||
3413 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
18f5b48f | 3414 | if (r < 0) |
6647dc66 LP |
3415 | return r; |
3416 | ||
3417 | l = *(uint8_t*) q; | |
902000c1 ZJS |
3418 | if (l == UINT8_MAX) |
3419 | /* avoid overflow right below */ | |
3420 | return -EBADMSG; | |
3421 | ||
6647dc66 LP |
3422 | r = message_peek_body(m, &rindex, 1, l+1, &q); |
3423 | if (r < 0) | |
3424 | return r; | |
2c93b4ef | 3425 | |
6647dc66 | 3426 | if (!validate_signature(q, l)) |
2c93b4ef LP |
3427 | return -EBADMSG; |
3428 | ||
0dcd14b9 | 3429 | if (p) |
6647dc66 | 3430 | *(const char**) p = q; |
2c93b4ef | 3431 | |
6647dc66 LP |
3432 | } else { |
3433 | ssize_t sz, align; | |
9a17484d | 3434 | |
6647dc66 LP |
3435 | align = bus_type_get_alignment(type); |
3436 | assert(align > 0); | |
2c93b4ef | 3437 | |
6647dc66 LP |
3438 | sz = bus_type_get_size(type); |
3439 | assert(sz > 0); | |
3440 | ||
3441 | r = message_peek_body(m, &rindex, align, sz, &q); | |
18f5b48f | 3442 | if (r < 0) |
6647dc66 LP |
3443 | return r; |
3444 | ||
3445 | switch (type) { | |
3446 | ||
3447 | case SD_BUS_TYPE_BYTE: | |
3448 | if (p) | |
3449 | *(uint8_t*) p = *(uint8_t*) q; | |
3450 | break; | |
3451 | ||
3452 | case SD_BUS_TYPE_BOOLEAN: | |
3453 | if (p) | |
3454 | *(int*) p = !!*(uint32_t*) q; | |
3455 | break; | |
3456 | ||
3457 | case SD_BUS_TYPE_INT16: | |
3458 | case SD_BUS_TYPE_UINT16: | |
3459 | if (p) | |
3460 | *(uint16_t*) p = BUS_MESSAGE_BSWAP16(m, *(uint16_t*) q); | |
3461 | break; | |
3462 | ||
3463 | case SD_BUS_TYPE_INT32: | |
3464 | case SD_BUS_TYPE_UINT32: | |
3465 | if (p) | |
3466 | *(uint32_t*) p = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3467 | break; | |
3468 | ||
3469 | case SD_BUS_TYPE_INT64: | |
3470 | case SD_BUS_TYPE_UINT64: | |
3471 | case SD_BUS_TYPE_DOUBLE: | |
3472 | if (p) | |
3473 | *(uint64_t*) p = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q); | |
3474 | break; | |
3475 | ||
3476 | case SD_BUS_TYPE_UNIX_FD: { | |
3477 | uint32_t j; | |
3478 | ||
3479 | j = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
3480 | if (j >= m->n_fds) | |
3481 | return -EBADMSG; | |
3482 | ||
3483 | if (p) | |
3484 | *(int*) p = m->fds[j]; | |
3485 | break; | |
3486 | } | |
3487 | ||
3488 | default: | |
3489 | assert_not_reached("Unknown basic type..."); | |
3490 | } | |
3491 | } | |
9a17484d LP |
3492 | } |
3493 | ||
6647dc66 LP |
3494 | m->rindex = rindex; |
3495 | ||
9a17484d LP |
3496 | if (c->enclosing != SD_BUS_TYPE_ARRAY) |
3497 | c->index++; | |
3498 | ||
3499 | return 1; | |
de1c301e LP |
3500 | } |
3501 | ||
9a17484d LP |
3502 | static int bus_message_enter_array( |
3503 | sd_bus_message *m, | |
3504 | struct bus_container *c, | |
3505 | const char *contents, | |
6647dc66 LP |
3506 | uint32_t **array_size, |
3507 | size_t *item_size, | |
3508 | size_t **offsets, | |
3509 | size_t *n_offsets) { | |
9a17484d LP |
3510 | |
3511 | size_t rindex; | |
3512 | void *q; | |
f88214cf | 3513 | int r; |
9a17484d LP |
3514 | |
3515 | assert(m); | |
3516 | assert(c); | |
3517 | assert(contents); | |
3518 | assert(array_size); | |
6647dc66 LP |
3519 | assert(item_size); |
3520 | assert(offsets); | |
3521 | assert(n_offsets); | |
9a17484d | 3522 | |
29ddb38f | 3523 | if (!signature_is_single(contents, true)) |
de1c301e | 3524 | return -EINVAL; |
9a17484d | 3525 | |
9a17484d | 3526 | if (!c->signature || c->signature[c->index] == 0) |
6647dc66 | 3527 | return -ENXIO; |
9a17484d LP |
3528 | |
3529 | if (c->signature[c->index] != SD_BUS_TYPE_ARRAY) | |
3530 | return -ENXIO; | |
3531 | ||
3532 | if (!startswith(c->signature + c->index + 1, contents)) | |
3533 | return -ENXIO; | |
3534 | ||
3535 | rindex = m->rindex; | |
9a17484d | 3536 | |
6647dc66 LP |
3537 | if (!BUS_MESSAGE_IS_GVARIANT(m)) { |
3538 | /* dbus1 */ | |
f88214cf | 3539 | int alignment; |
9a17484d | 3540 | |
6647dc66 | 3541 | r = message_peek_body(m, &rindex, 4, 4, &q); |
18f5b48f | 3542 | if (r < 0) |
6647dc66 | 3543 | return r; |
9a17484d | 3544 | |
6647dc66 LP |
3545 | if (BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q) > BUS_ARRAY_MAX_SIZE) |
3546 | return -EBADMSG; | |
9a17484d | 3547 | |
6647dc66 LP |
3548 | alignment = bus_type_get_alignment(contents[0]); |
3549 | if (alignment < 0) | |
3550 | return alignment; | |
3551 | ||
3552 | r = message_peek_body(m, &rindex, alignment, 0, NULL); | |
3553 | if (r < 0) | |
3554 | return r; | |
6647dc66 LP |
3555 | |
3556 | *array_size = (uint32_t*) q; | |
3557 | ||
3558 | } else if (c->item_size <= 0) { | |
3559 | ||
3560 | /* gvariant: empty array */ | |
3561 | *item_size = 0; | |
3562 | *offsets = NULL; | |
3563 | *n_offsets = 0; | |
3564 | ||
3565 | } else if (bus_gvariant_is_fixed_size(contents)) { | |
3566 | ||
3567 | /* gvariant: fixed length array */ | |
3568 | *item_size = bus_gvariant_get_size(contents); | |
3569 | *offsets = NULL; | |
3570 | *n_offsets = 0; | |
3571 | ||
3572 | } else { | |
f88214cf ZJS |
3573 | size_t where, previous = 0, framing, sz; |
3574 | int alignment; | |
6647dc66 LP |
3575 | unsigned i; |
3576 | ||
3577 | /* gvariant: variable length array */ | |
2ac7c17f | 3578 | sz = bus_gvariant_determine_word_size(c->item_size, 0); |
6647dc66 LP |
3579 | |
3580 | where = rindex + c->item_size - sz; | |
3581 | r = message_peek_body(m, &where, 1, sz, &q); | |
3582 | if (r < 0) | |
3583 | return r; | |
6647dc66 | 3584 | |
2ac7c17f | 3585 | framing = bus_gvariant_read_word_le(q, sz); |
6647dc66 LP |
3586 | if (framing > c->item_size - sz) |
3587 | return -EBADMSG; | |
3588 | if ((c->item_size - framing) % sz != 0) | |
3589 | return -EBADMSG; | |
3590 | ||
3591 | *n_offsets = (c->item_size - framing) / sz; | |
3592 | ||
3593 | where = rindex + framing; | |
3594 | r = message_peek_body(m, &where, 1, *n_offsets * sz, &q); | |
3595 | if (r < 0) | |
3596 | return r; | |
6647dc66 LP |
3597 | |
3598 | *offsets = new(size_t, *n_offsets); | |
3599 | if (!*offsets) | |
3600 | return -ENOMEM; | |
3601 | ||
f88214cf ZJS |
3602 | alignment = bus_gvariant_get_alignment(c->signature); |
3603 | assert(alignment > 0); | |
3604 | ||
6647dc66 | 3605 | for (i = 0; i < *n_offsets; i++) { |
f88214cf ZJS |
3606 | size_t x, start; |
3607 | ||
3608 | start = ALIGN_TO(previous, alignment); | |
6647dc66 | 3609 | |
2ac7c17f | 3610 | x = bus_gvariant_read_word_le((uint8_t*) q + i * sz, sz); |
6647dc66 LP |
3611 | if (x > c->item_size - sz) |
3612 | return -EBADMSG; | |
f88214cf | 3613 | if (x < start) |
6647dc66 LP |
3614 | return -EBADMSG; |
3615 | ||
3616 | (*offsets)[i] = rindex + x; | |
f88214cf | 3617 | previous = x; |
6647dc66 LP |
3618 | } |
3619 | ||
3620 | *item_size = (*offsets)[0] - rindex; | |
3621 | } | |
3622 | ||
3623 | m->rindex = rindex; | |
3624 | ||
3625 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3626 | c->index += 1 + strlen(contents); | |
9a17484d LP |
3627 | |
3628 | return 1; | |
3629 | } | |
3630 | ||
3631 | static int bus_message_enter_variant( | |
3632 | sd_bus_message *m, | |
3633 | struct bus_container *c, | |
6647dc66 LP |
3634 | const char *contents, |
3635 | size_t *item_size) { | |
9a17484d LP |
3636 | |
3637 | size_t rindex; | |
3638 | uint8_t l; | |
3639 | void *q; | |
3640 | int r; | |
3641 | ||
3642 | assert(m); | |
3643 | assert(c); | |
3644 | assert(contents); | |
6647dc66 | 3645 | assert(item_size); |
9a17484d | 3646 | |
29ddb38f | 3647 | if (!signature_is_single(contents, false)) |
de1c301e | 3648 | return -EINVAL; |
de1c301e | 3649 | |
9a17484d LP |
3650 | if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN) |
3651 | return -EINVAL; | |
3652 | ||
3653 | if (!c->signature || c->signature[c->index] == 0) | |
6647dc66 | 3654 | return -ENXIO; |
9a17484d LP |
3655 | |
3656 | if (c->signature[c->index] != SD_BUS_TYPE_VARIANT) | |
3657 | return -ENXIO; | |
3658 | ||
3659 | rindex = m->rindex; | |
9a17484d | 3660 | |
6647dc66 LP |
3661 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
3662 | size_t k, where; | |
3663 | ||
3664 | k = strlen(contents); | |
3665 | if (1+k > c->item_size) | |
3666 | return -EBADMSG; | |
3667 | ||
3668 | where = rindex + c->item_size - (1+k); | |
3669 | r = message_peek_body(m, &where, 1, 1+k, &q); | |
3670 | if (r < 0) | |
3671 | return r; | |
6647dc66 LP |
3672 | |
3673 | if (*(char*) q != 0) | |
3674 | return -EBADMSG; | |
3675 | ||
3676 | if (memcmp((uint8_t*) q+1, contents, k)) | |
3677 | return -ENXIO; | |
3678 | ||
3679 | *item_size = c->item_size - (1+k); | |
3680 | ||
3681 | } else { | |
3682 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
3683 | if (r < 0) | |
3684 | return r; | |
6647dc66 LP |
3685 | |
3686 | l = *(uint8_t*) q; | |
902000c1 ZJS |
3687 | if (l == UINT8_MAX) |
3688 | /* avoid overflow right below */ | |
3689 | return -EBADMSG; | |
3690 | ||
6647dc66 LP |
3691 | r = message_peek_body(m, &rindex, 1, l+1, &q); |
3692 | if (r < 0) | |
3693 | return r; | |
6647dc66 LP |
3694 | |
3695 | if (!validate_signature(q, l)) | |
3696 | return -EBADMSG; | |
3697 | ||
3698 | if (!streq(q, contents)) | |
3699 | return -ENXIO; | |
3700 | } | |
3701 | ||
3702 | m->rindex = rindex; | |
3703 | ||
3704 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3705 | c->index++; | |
3706 | ||
3707 | return 1; | |
3708 | } | |
3709 | ||
3710 | static int build_struct_offsets( | |
3711 | sd_bus_message *m, | |
3712 | const char *signature, | |
3713 | size_t size, | |
3714 | size_t *item_size, | |
3715 | size_t **offsets, | |
3716 | size_t *n_offsets) { | |
3717 | ||
3718 | unsigned n_variable = 0, n_total = 0, v; | |
12603b84 | 3719 | size_t previous, where; |
6647dc66 LP |
3720 | const char *p; |
3721 | size_t sz; | |
3722 | void *q; | |
3723 | int r; | |
3724 | ||
3725 | assert(m); | |
6647dc66 LP |
3726 | assert(item_size); |
3727 | assert(offsets); | |
3728 | assert(n_offsets); | |
3729 | ||
d6385068 | 3730 | if (isempty(signature)) { |
e53d21d0 DH |
3731 | /* Unary type is encoded as *fixed* 1 byte padding */ |
3732 | r = message_peek_body(m, &m->rindex, 1, 1, &q); | |
3733 | if (r < 0) | |
3734 | return r; | |
3735 | ||
3736 | if (*(uint8_t *) q != 0) | |
3737 | return -EBADMSG; | |
3738 | ||
d6385068 LP |
3739 | *item_size = 0; |
3740 | *offsets = NULL; | |
3741 | *n_offsets = 0; | |
3742 | return 0; | |
3743 | } | |
3744 | ||
2ac7c17f | 3745 | sz = bus_gvariant_determine_word_size(size, 0); |
d6385068 LP |
3746 | if (sz <= 0) |
3747 | return -EBADMSG; | |
6647dc66 LP |
3748 | |
3749 | /* First, loop over signature and count variable elements and | |
3750 | * elements in general. We use this to know how large the | |
3751 | * offset array is at the end of the structure. Note that | |
3752 | * GVariant only stores offsets for all variable size elements | |
3753 | * that are not the last item. */ | |
3754 | ||
3755 | p = signature; | |
3756 | while (*p != 0) { | |
3757 | size_t n; | |
3758 | ||
3759 | r = signature_element_length(p, &n); | |
3760 | if (r < 0) | |
3761 | return r; | |
3762 | else { | |
3763 | char t[n+1]; | |
3764 | ||
3765 | memcpy(t, p, n); | |
3766 | t[n] = 0; | |
3767 | ||
3768 | r = bus_gvariant_is_fixed_size(t); | |
3769 | } | |
3770 | ||
3771 | if (r < 0) | |
3772 | return r; | |
3773 | if (r == 0 && p[n] != 0) /* except the last item */ | |
313cefa1 | 3774 | n_variable++; |
6647dc66 LP |
3775 | n_total++; |
3776 | ||
3777 | p += n; | |
3778 | } | |
3779 | ||
3780 | if (size < n_variable * sz) | |
3781 | return -EBADMSG; | |
3782 | ||
3783 | where = m->rindex + size - (n_variable * sz); | |
3784 | r = message_peek_body(m, &where, 1, n_variable * sz, &q); | |
9a17484d LP |
3785 | if (r < 0) |
3786 | return r; | |
9a17484d | 3787 | |
6647dc66 | 3788 | v = n_variable; |
9a17484d | 3789 | |
6647dc66 LP |
3790 | *offsets = new(size_t, n_total); |
3791 | if (!*offsets) | |
3792 | return -ENOMEM; | |
9a17484d | 3793 | |
6647dc66 | 3794 | *n_offsets = 0; |
9a17484d | 3795 | |
6647dc66 LP |
3796 | /* Second, loop again and build an offset table */ |
3797 | p = signature; | |
12603b84 | 3798 | previous = m->rindex; |
6647dc66 LP |
3799 | while (*p != 0) { |
3800 | size_t n, offset; | |
3801 | int k; | |
9a17484d | 3802 | |
6647dc66 LP |
3803 | r = signature_element_length(p, &n); |
3804 | if (r < 0) | |
3805 | return r; | |
3806 | else { | |
3807 | char t[n+1]; | |
3808 | ||
3809 | memcpy(t, p, n); | |
3810 | t[n] = 0; | |
3811 | ||
12603b84 ZJS |
3812 | size_t align = bus_gvariant_get_alignment(t); |
3813 | assert(align > 0); | |
3814 | ||
3815 | /* The possible start of this member after including alignment */ | |
3816 | size_t start = ALIGN_TO(previous, align); | |
3817 | ||
6647dc66 LP |
3818 | k = bus_gvariant_get_size(t); |
3819 | if (k < 0) { | |
3820 | size_t x; | |
3821 | ||
12603b84 | 3822 | /* Variable size */ |
6647dc66 LP |
3823 | if (v > 0) { |
3824 | v--; | |
3825 | ||
2ac7c17f | 3826 | x = bus_gvariant_read_word_le((uint8_t*) q + v*sz, sz); |
6647dc66 LP |
3827 | if (x >= size) |
3828 | return -EBADMSG; | |
6647dc66 | 3829 | } else |
12603b84 ZJS |
3830 | /* The last item's end is determined |
3831 | * from the start of the offset array */ | |
6647dc66 LP |
3832 | x = size - (n_variable * sz); |
3833 | ||
3834 | offset = m->rindex + x; | |
baaa35ad ZJS |
3835 | if (offset < start) |
3836 | return log_debug_errno(SYNTHETIC_ERRNO(EBADMSG), | |
3837 | "For type %s with alignment %zu, message specifies offset %zu which is smaller than previous end %zu + alignment = %zu", | |
3838 | t, align, | |
3839 | offset, | |
3840 | previous, | |
3841 | start); | |
12603b84 ZJS |
3842 | } else |
3843 | /* Fixed size */ | |
3844 | offset = start + k; | |
6647dc66 LP |
3845 | } |
3846 | ||
3847 | previous = (*offsets)[(*n_offsets)++] = offset; | |
3848 | p += n; | |
3849 | } | |
3850 | ||
3851 | assert(v == 0); | |
3852 | assert(*n_offsets == n_total); | |
3853 | ||
3854 | *item_size = (*offsets)[0] - m->rindex; | |
3855 | return 0; | |
3856 | } | |
3857 | ||
3858 | static int enter_struct_or_dict_entry( | |
3859 | sd_bus_message *m, | |
3860 | struct bus_container *c, | |
3861 | const char *contents, | |
3862 | size_t *item_size, | |
3863 | size_t **offsets, | |
3864 | size_t *n_offsets) { | |
3865 | ||
3866 | int r; | |
3867 | ||
3868 | assert(m); | |
3869 | assert(c); | |
3870 | assert(contents); | |
3871 | assert(item_size); | |
3872 | assert(offsets); | |
3873 | assert(n_offsets); | |
3874 | ||
3875 | if (!BUS_MESSAGE_IS_GVARIANT(m)) { | |
3876 | ||
3877 | /* dbus1 */ | |
3878 | r = message_peek_body(m, &m->rindex, 8, 0, NULL); | |
18f5b48f | 3879 | if (r < 0) |
6647dc66 LP |
3880 | return r; |
3881 | ||
6647dc66 LP |
3882 | } else |
3883 | /* gvariant with contents */ | |
3884 | return build_struct_offsets(m, contents, c->item_size, item_size, offsets, n_offsets); | |
3885 | ||
3886 | return 0; | |
de1c301e LP |
3887 | } |
3888 | ||
9a17484d LP |
3889 | static int bus_message_enter_struct( |
3890 | sd_bus_message *m, | |
3891 | struct bus_container *c, | |
6647dc66 LP |
3892 | const char *contents, |
3893 | size_t *item_size, | |
3894 | size_t **offsets, | |
3895 | size_t *n_offsets) { | |
9a17484d LP |
3896 | |
3897 | size_t l; | |
3898 | int r; | |
3899 | ||
3900 | assert(m); | |
3901 | assert(c); | |
3902 | assert(contents); | |
6647dc66 LP |
3903 | assert(item_size); |
3904 | assert(offsets); | |
3905 | assert(n_offsets); | |
9a17484d LP |
3906 | |
3907 | if (!signature_is_valid(contents, false)) | |
3908 | return -EINVAL; | |
3909 | ||
3910 | if (!c->signature || c->signature[c->index] == 0) | |
6647dc66 | 3911 | return -ENXIO; |
9a17484d LP |
3912 | |
3913 | l = strlen(contents); | |
3914 | ||
3915 | if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN || | |
3916 | !startswith(c->signature + c->index + 1, contents) || | |
3917 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END) | |
3918 | return -ENXIO; | |
3919 | ||
6647dc66 LP |
3920 | r = enter_struct_or_dict_entry(m, c, contents, item_size, offsets, n_offsets); |
3921 | if (r < 0) | |
9a17484d LP |
3922 | return r; |
3923 | ||
3924 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3925 | c->index += 1 + l + 1; | |
3926 | ||
3927 | return 1; | |
3928 | } | |
3929 | ||
3930 | static int bus_message_enter_dict_entry( | |
3931 | sd_bus_message *m, | |
3932 | struct bus_container *c, | |
6647dc66 LP |
3933 | const char *contents, |
3934 | size_t *item_size, | |
3935 | size_t **offsets, | |
3936 | size_t *n_offsets) { | |
9a17484d LP |
3937 | |
3938 | size_t l; | |
3939 | int r; | |
3940 | ||
3941 | assert(m); | |
3942 | assert(c); | |
3943 | assert(contents); | |
3944 | ||
3945 | if (!signature_is_pair(contents)) | |
3946 | return -EINVAL; | |
3947 | ||
3948 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3949 | return -ENXIO; | |
3950 | ||
3951 | if (!c->signature || c->signature[c->index] == 0) | |
3952 | return 0; | |
3953 | ||
3954 | l = strlen(contents); | |
3955 | ||
3956 | if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN || | |
3957 | !startswith(c->signature + c->index + 1, contents) || | |
3958 | c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END) | |
3959 | return -ENXIO; | |
3960 | ||
6647dc66 LP |
3961 | r = enter_struct_or_dict_entry(m, c, contents, item_size, offsets, n_offsets); |
3962 | if (r < 0) | |
9a17484d LP |
3963 | return r; |
3964 | ||
3965 | if (c->enclosing != SD_BUS_TYPE_ARRAY) | |
3966 | c->index += 1 + l + 1; | |
3967 | ||
3968 | return 1; | |
3969 | } | |
3970 | ||
d9f644e2 ZJS |
3971 | _public_ int sd_bus_message_enter_container(sd_bus_message *m, |
3972 | char type, | |
3973 | const char *contents) { | |
cf81c68e | 3974 | struct bus_container *c; |
9a17484d | 3975 | uint32_t *array_size = NULL; |
7a4b8512 | 3976 | _cleanup_free_ char *signature = NULL; |
cf81c68e | 3977 | size_t before, end; |
7a4b8512 | 3978 | _cleanup_free_ size_t *offsets = NULL; |
6647dc66 | 3979 | size_t n_offsets = 0, item_size = 0; |
9a17484d LP |
3980 | int r; |
3981 | ||
275b39fe LP |
3982 | assert_return(m, -EINVAL); |
3983 | assert_return(m->sealed, -EPERM); | |
3984 | assert_return(type != 0 || !contents, -EINVAL); | |
3985 | ||
3986 | if (type == 0 || !contents) { | |
3987 | const char *cc; | |
3988 | char tt; | |
3989 | ||
3990 | /* Allow entering into anonymous containers */ | |
3991 | r = sd_bus_message_peek_type(m, &tt, &cc); | |
18f5b48f | 3992 | if (r < 0) |
275b39fe LP |
3993 | return r; |
3994 | ||
3995 | if (type != 0 && type != tt) | |
3996 | return -ENXIO; | |
3997 | ||
3998 | if (contents && !streq(contents, cc)) | |
3999 | return -ENXIO; | |
4000 | ||
4001 | type = tt; | |
4002 | contents = cc; | |
4003 | } | |
9a17484d | 4004 | |
ed205a6b LP |
4005 | /* |
4006 | * We enforce a global limit on container depth, that is much | |
4007 | * higher than the 32 structs and 32 arrays the specification | |
4008 | * mandates. This is simpler to implement for us, and we need | |
4009 | * this only to ensure our container array doesn't grow | |
4010 | * without bounds. We are happy to return any data from a | |
4011 | * message as long as the data itself is valid, even if the | |
4012 | * overall message might be not. | |
4013 | * | |
4014 | * Note that the message signature is validated when | |
4015 | * parsing the headers, and that validation does check the | |
4016 | * 32/32 limit. | |
4017 | * | |
4018 | * Note that the specification defines no limits on the depth | |
4019 | * of stacked variants, but we do. | |
4020 | */ | |
4021 | if (m->n_containers >= BUS_CONTAINER_DEPTH) | |
4022 | return -EBADMSG; | |
4023 | ||
306f07be | 4024 | if (!GREEDY_REALLOC(m->containers, m->containers_allocated, m->n_containers + 1)) |
9a17484d | 4025 | return -ENOMEM; |
9a17484d | 4026 | |
7b058942 | 4027 | if (message_end_of_signature(m)) |
430fb8fa | 4028 | return -ENXIO; |
9a17484d | 4029 | |
1daf8121 LP |
4030 | if (message_end_of_array(m, m->rindex)) |
4031 | return 0; | |
4032 | ||
9c65778d | 4033 | c = message_get_last_container(m); |
7b058942 | 4034 | |
9a17484d LP |
4035 | signature = strdup(contents); |
4036 | if (!signature) | |
4037 | return -ENOMEM; | |
4038 | ||
b3af9646 LP |
4039 | c->saved_index = c->index; |
4040 | before = m->rindex; | |
4041 | ||
9a17484d | 4042 | if (type == SD_BUS_TYPE_ARRAY) |
6647dc66 | 4043 | r = bus_message_enter_array(m, c, contents, &array_size, &item_size, &offsets, &n_offsets); |
9a17484d | 4044 | else if (type == SD_BUS_TYPE_VARIANT) |
6647dc66 | 4045 | r = bus_message_enter_variant(m, c, contents, &item_size); |
9a17484d | 4046 | else if (type == SD_BUS_TYPE_STRUCT) |
6647dc66 | 4047 | r = bus_message_enter_struct(m, c, contents, &item_size, &offsets, &n_offsets); |
9a17484d | 4048 | else if (type == SD_BUS_TYPE_DICT_ENTRY) |
6647dc66 | 4049 | r = bus_message_enter_dict_entry(m, c, contents, &item_size, &offsets, &n_offsets); |
9a17484d LP |
4050 | else |
4051 | r = -EINVAL; | |
7a4b8512 | 4052 | if (r <= 0) |
9a17484d | 4053 | return r; |
9a17484d LP |
4054 | |
4055 | /* OK, let's fill it in */ | |
e53d21d0 DH |
4056 | if (BUS_MESSAGE_IS_GVARIANT(m) && |
4057 | type == SD_BUS_TYPE_STRUCT && | |
4058 | isempty(signature)) | |
cf81c68e | 4059 | end = m->rindex + 0; |
e53d21d0 | 4060 | else |
cf81c68e | 4061 | end = m->rindex + c->item_size; |
ac0a94f7 | 4062 | |
cf81c68e ZJS |
4063 | m->containers[m->n_containers++] = (struct bus_container) { |
4064 | .enclosing = type, | |
4065 | .signature = TAKE_PTR(signature), | |
4066 | ||
4067 | .before = before, | |
4068 | .begin = m->rindex, | |
4069 | /* Unary type has fixed size of 1, but virtual size of 0 */ | |
4070 | .end = end, | |
4071 | .array_size = array_size, | |
4072 | .item_size = item_size, | |
4073 | .offsets = TAKE_PTR(offsets), | |
4074 | .n_offsets = n_offsets, | |
4075 | }; | |
9a17484d LP |
4076 | |
4077 | return 1; | |
4078 | } | |
4079 | ||
d9f644e2 | 4080 | _public_ int sd_bus_message_exit_container(sd_bus_message *m) { |
9a17484d | 4081 | struct bus_container *c; |
5763192a | 4082 | unsigned saved; |
6647dc66 | 4083 | int r; |
9a17484d | 4084 | |
9d6c7c82 LP |
4085 | assert_return(m, -EINVAL); |
4086 | assert_return(m->sealed, -EPERM); | |
f959af20 | 4087 | assert_return(m->n_containers > 0, -ENXIO); |
9a17484d | 4088 | |
9c65778d | 4089 | c = message_get_last_container(m); |
6647dc66 LP |
4090 | |
4091 | if (c->enclosing != SD_BUS_TYPE_ARRAY) { | |
4092 | if (c->signature && c->signature[c->index] != 0) | |
4093 | return -EBUSY; | |
4094 | } | |
4095 | ||
4096 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
4097 | if (m->rindex < c->end) | |
4098 | return -EBUSY; | |
4099 | ||
4100 | } else if (c->enclosing == SD_BUS_TYPE_ARRAY) { | |
9a17484d LP |
4101 | uint32_t l; |
4102 | ||
4103 | l = BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
4104 | if (c->begin + l != m->rindex) | |
4105 | return -EBUSY; | |
9a17484d LP |
4106 | } |
4107 | ||
6d1e0f4f | 4108 | message_free_last_container(m); |
9a17484d | 4109 | |
9c65778d | 4110 | c = message_get_last_container(m); |
5763192a LP |
4111 | saved = c->index; |
4112 | c->index = c->saved_index; | |
6647dc66 | 4113 | r = container_next_item(m, c, &m->rindex); |
5763192a | 4114 | c->index = saved; |
6647dc66 LP |
4115 | if (r < 0) |
4116 | return r; | |
4117 | ||
9a17484d LP |
4118 | return 1; |
4119 | } | |
4120 | ||
b3af9646 LP |
4121 | static void message_quit_container(sd_bus_message *m) { |
4122 | struct bus_container *c; | |
4123 | ||
4124 | assert(m); | |
4125 | assert(m->sealed); | |
4126 | assert(m->n_containers > 0); | |
4127 | ||
b3af9646 | 4128 | /* Undo seeks */ |
9c65778d | 4129 | c = message_get_last_container(m); |
b3af9646 LP |
4130 | assert(m->rindex >= c->before); |
4131 | m->rindex = c->before; | |
4132 | ||
4133 | /* Free container */ | |
6d1e0f4f | 4134 | message_free_last_container(m); |
b3af9646 LP |
4135 | |
4136 | /* Correct index of new top-level container */ | |
9c65778d | 4137 | c = message_get_last_container(m); |
b3af9646 LP |
4138 | c->index = c->saved_index; |
4139 | } | |
4140 | ||
d9f644e2 | 4141 | _public_ int sd_bus_message_peek_type(sd_bus_message *m, char *type, const char **contents) { |
9a17484d LP |
4142 | struct bus_container *c; |
4143 | int r; | |
4144 | ||
c430fee6 LP |
4145 | assert_return(m, -EINVAL); |
4146 | assert_return(m->sealed, -EPERM); | |
9a17484d | 4147 | |
7b058942 | 4148 | if (message_end_of_signature(m)) |
9a17484d LP |
4149 | goto eof; |
4150 | ||
4151 | if (message_end_of_array(m, m->rindex)) | |
4152 | goto eof; | |
4153 | ||
9c65778d | 4154 | c = message_get_last_container(m); |
7b058942 | 4155 | |
9a17484d LP |
4156 | if (bus_type_is_basic(c->signature[c->index])) { |
4157 | if (contents) | |
4158 | *contents = NULL; | |
4159 | if (type) | |
4160 | *type = c->signature[c->index]; | |
4161 | return 1; | |
4162 | } | |
4163 | ||
4164 | if (c->signature[c->index] == SD_BUS_TYPE_ARRAY) { | |
4165 | ||
4166 | if (contents) { | |
4167 | size_t l; | |
9a17484d LP |
4168 | |
4169 | r = signature_element_length(c->signature+c->index+1, &l); | |
4170 | if (r < 0) | |
4171 | return r; | |
4172 | ||
7f546026 | 4173 | /* signature_element_length does verification internally */ |
80a46c73 | 4174 | |
ec6bda56 | 4175 | /* The array element must not be empty */ |
7f546026 ZJS |
4176 | assert(l >= 1); |
4177 | if (free_and_strndup(&c->peeked_signature, | |
4178 | c->signature + c->index + 1, l) < 0) | |
9a17484d LP |
4179 | return -ENOMEM; |
4180 | ||
7f546026 | 4181 | *contents = c->peeked_signature; |
9a17484d LP |
4182 | } |
4183 | ||
4184 | if (type) | |
4185 | *type = SD_BUS_TYPE_ARRAY; | |
4186 | ||
4187 | return 1; | |
4188 | } | |
4189 | ||
4c701096 | 4190 | if (IN_SET(c->signature[c->index], SD_BUS_TYPE_STRUCT_BEGIN, SD_BUS_TYPE_DICT_ENTRY_BEGIN)) { |
9a17484d LP |
4191 | |
4192 | if (contents) { | |
4193 | size_t l; | |
9a17484d LP |
4194 | |
4195 | r = signature_element_length(c->signature+c->index, &l); | |
4196 | if (r < 0) | |
4197 | return r; | |
4198 | ||
ec6bda56 | 4199 | assert(l >= 3); |
7f546026 ZJS |
4200 | if (free_and_strndup(&c->peeked_signature, |
4201 | c->signature + c->index + 1, l - 2) < 0) | |
9a17484d LP |
4202 | return -ENOMEM; |
4203 | ||
7f546026 | 4204 | *contents = c->peeked_signature; |
9a17484d LP |
4205 | } |
4206 | ||
4207 | if (type) | |
4208 | *type = c->signature[c->index] == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY; | |
4209 | ||
4210 | return 1; | |
4211 | } | |
4212 | ||
4213 | if (c->signature[c->index] == SD_BUS_TYPE_VARIANT) { | |
4214 | if (contents) { | |
9a17484d LP |
4215 | void *q; |
4216 | ||
6647dc66 LP |
4217 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
4218 | size_t k; | |
9a17484d | 4219 | |
6647dc66 LP |
4220 | if (c->item_size < 2) |
4221 | return -EBADMSG; | |
9a17484d | 4222 | |
6647dc66 LP |
4223 | /* Look for the NUL delimiter that |
4224 | separates the payload from the | |
4225 | signature. Since the body might be | |
4226 | in a different part that then the | |
4227 | signature we map byte by byte. */ | |
4228 | ||
4229 | for (k = 2; k <= c->item_size; k++) { | |
4230 | size_t where; | |
4231 | ||
4232 | where = m->rindex + c->item_size - k; | |
4233 | r = message_peek_body(m, &where, 1, k, &q); | |
4234 | if (r < 0) | |
4235 | return r; | |
6647dc66 LP |
4236 | |
4237 | if (*(char*) q == 0) | |
4238 | break; | |
4239 | } | |
4240 | ||
4241 | if (k > c->item_size) | |
4242 | return -EBADMSG; | |
4243 | ||
7f546026 ZJS |
4244 | if (free_and_strndup(&c->peeked_signature, |
4245 | (char*) q + 1, k - 1) < 0) | |
6647dc66 LP |
4246 | return -ENOMEM; |
4247 | ||
3798fd4c | 4248 | if (!signature_is_valid(c->peeked_signature, true)) |
6647dc66 LP |
4249 | return -EBADMSG; |
4250 | ||
3798fd4c | 4251 | *contents = c->peeked_signature; |
6647dc66 LP |
4252 | } else { |
4253 | size_t rindex, l; | |
4254 | ||
4255 | rindex = m->rindex; | |
4256 | r = message_peek_body(m, &rindex, 1, 1, &q); | |
4257 | if (r < 0) | |
4258 | return r; | |
9a17484d | 4259 | |
6647dc66 | 4260 | l = *(uint8_t*) q; |
902000c1 ZJS |
4261 | if (l == UINT8_MAX) |
4262 | /* avoid overflow right below */ | |
4263 | return -EBADMSG; | |
4264 | ||
6647dc66 LP |
4265 | r = message_peek_body(m, &rindex, 1, l+1, &q); |
4266 | if (r < 0) | |
4267 | return r; | |
6647dc66 LP |
4268 | |
4269 | if (!validate_signature(q, l)) | |
4270 | return -EBADMSG; | |
4271 | ||
4272 | *contents = q; | |
4273 | } | |
9a17484d LP |
4274 | } |
4275 | ||
4276 | if (type) | |
4277 | *type = SD_BUS_TYPE_VARIANT; | |
4278 | ||
4279 | return 1; | |
4280 | } | |
4281 | ||
4282 | return -EINVAL; | |
4283 | ||
4284 | eof: | |
4285 | if (type) | |
7b058942 | 4286 | *type = 0; |
9a17484d LP |
4287 | if (contents) |
4288 | *contents = NULL; | |
4289 | return 0; | |
4290 | } | |
4291 | ||
d9f644e2 | 4292 | _public_ int sd_bus_message_rewind(sd_bus_message *m, int complete) { |
9a17484d LP |
4293 | struct bus_container *c; |
4294 | ||
9d6c7c82 LP |
4295 | assert_return(m, -EINVAL); |
4296 | assert_return(m->sealed, -EPERM); | |
9a17484d LP |
4297 | |
4298 | if (complete) { | |
bc7fd8cd | 4299 | message_reset_containers(m); |
9a17484d | 4300 | m->rindex = 0; |
9a17484d | 4301 | |
9c65778d | 4302 | c = message_get_last_container(m); |
9a17484d | 4303 | } else { |
9c65778d | 4304 | c = message_get_last_container(m); |
9a17484d LP |
4305 | |
4306 | c->index = 0; | |
4307 | m->rindex = c->begin; | |
4308 | } | |
4309 | ||
d36b7031 | 4310 | c->offset_index = 0; |
e4bb80a0 | 4311 | c->item_size = (c->n_offsets > 0 ? c->offsets[0] : c->end) - c->begin; |
d36b7031 | 4312 | |
9a17484d LP |
4313 | return !isempty(c->signature); |
4314 | } | |
718db961 | 4315 | |
11ce0db2 | 4316 | _public_ int sd_bus_message_readv( |
1b492614 LP |
4317 | sd_bus_message *m, |
4318 | const char *types, | |
4319 | va_list ap) { | |
9a17484d | 4320 | |
fe1d424d LP |
4321 | unsigned n_array, n_struct; |
4322 | TypeStack stack[BUS_CONTAINER_DEPTH]; | |
4323 | unsigned stack_ptr = 0; | |
430fb8fa | 4324 | unsigned n_loop = 0; |
9a17484d LP |
4325 | int r; |
4326 | ||
11ce0db2 VH |
4327 | assert_return(m, -EINVAL); |
4328 | assert_return(m->sealed, -EPERM); | |
4329 | assert_return(types, -EINVAL); | |
1b492614 | 4330 | |
430fb8fa | 4331 | if (isempty(types)) |
1b492614 | 4332 | return 0; |
9a17484d | 4333 | |
fe1d424d LP |
4334 | /* Ideally, we'd just call ourselves recursively on every |
4335 | * complex type. However, the state of a va_list that is | |
4336 | * passed to a function is undefined after that function | |
22509a8d | 4337 | * returns. This means we need to decode the va_list linearly |
fe1d424d LP |
4338 | * in a single stackframe. We hence implement our own |
4339 | * home-grown stack in an array. */ | |
4340 | ||
6f285378 | 4341 | n_array = (unsigned) -1; /* length of current array entries */ |
430fb8fa | 4342 | n_struct = strlen(types); /* length of current struct contents signature */ |
fe1d424d LP |
4343 | |
4344 | for (;;) { | |
4345 | const char *t; | |
4346 | ||
430fb8fa LP |
4347 | n_loop++; |
4348 | ||
1b492614 | 4349 | if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) { |
fe1d424d LP |
4350 | r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array); |
4351 | if (r < 0) | |
4352 | return r; | |
4353 | if (r == 0) | |
4354 | break; | |
4355 | ||
4356 | r = sd_bus_message_exit_container(m); | |
4357 | if (r < 0) | |
4358 | return r; | |
4359 | ||
4360 | continue; | |
4361 | } | |
4362 | ||
4363 | t = types; | |
4364 | if (n_array != (unsigned) -1) | |
313cefa1 | 4365 | n_array--; |
fe1d424d | 4366 | else { |
313cefa1 | 4367 | types++; |
fe1d424d LP |
4368 | n_struct--; |
4369 | } | |
4370 | ||
9a17484d LP |
4371 | switch (*t) { |
4372 | ||
4373 | case SD_BUS_TYPE_BYTE: | |
4374 | case SD_BUS_TYPE_BOOLEAN: | |
4375 | case SD_BUS_TYPE_INT16: | |
4376 | case SD_BUS_TYPE_UINT16: | |
4377 | case SD_BUS_TYPE_INT32: | |
4378 | case SD_BUS_TYPE_UINT32: | |
4379 | case SD_BUS_TYPE_INT64: | |
4380 | case SD_BUS_TYPE_UINT64: | |
4381 | case SD_BUS_TYPE_DOUBLE: | |
4382 | case SD_BUS_TYPE_STRING: | |
4383 | case SD_BUS_TYPE_OBJECT_PATH: | |
2c93b4ef LP |
4384 | case SD_BUS_TYPE_SIGNATURE: |
4385 | case SD_BUS_TYPE_UNIX_FD: { | |
9a17484d LP |
4386 | void *p; |
4387 | ||
4388 | p = va_arg(ap, void*); | |
4389 | r = sd_bus_message_read_basic(m, *t, p); | |
fe1d424d LP |
4390 | if (r < 0) |
4391 | return r; | |
430fb8fa LP |
4392 | if (r == 0) { |
4393 | if (n_loop <= 1) | |
4394 | return 0; | |
4395 | ||
fe1d424d | 4396 | return -ENXIO; |
430fb8fa | 4397 | } |
fe1d424d | 4398 | |
9a17484d LP |
4399 | break; |
4400 | } | |
4401 | ||
4402 | case SD_BUS_TYPE_ARRAY: { | |
4403 | size_t k; | |
4404 | ||
4405 | r = signature_element_length(t + 1, &k); | |
4406 | if (r < 0) | |
4407 | return r; | |
4408 | ||
4409 | { | |
9a17484d | 4410 | char s[k + 1]; |
9a17484d LP |
4411 | memcpy(s, t + 1, k); |
4412 | s[k] = 0; | |
9a17484d LP |
4413 | |
4414 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s); | |
4415 | if (r < 0) | |
4416 | return r; | |
430fb8fa LP |
4417 | if (r == 0) { |
4418 | if (n_loop <= 1) | |
4419 | return 0; | |
4420 | ||
9a17484d | 4421 | return -ENXIO; |
430fb8fa | 4422 | } |
fe1d424d | 4423 | } |
9a17484d | 4424 | |
fe1d424d LP |
4425 | if (n_array == (unsigned) -1) { |
4426 | types += k; | |
4427 | n_struct -= k; | |
9a17484d LP |
4428 | } |
4429 | ||
fe1d424d LP |
4430 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
4431 | if (r < 0) | |
4432 | return r; | |
4433 | ||
4434 | types = t + 1; | |
4435 | n_struct = k; | |
4436 | n_array = va_arg(ap, unsigned); | |
4437 | ||
9a17484d LP |
4438 | break; |
4439 | } | |
4440 | ||
4441 | case SD_BUS_TYPE_VARIANT: { | |
4442 | const char *s; | |
4443 | ||
4444 | s = va_arg(ap, const char *); | |
4445 | if (!s) | |
4446 | return -EINVAL; | |
4447 | ||
4448 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, s); | |
4449 | if (r < 0) | |
4450 | return r; | |
430fb8fa LP |
4451 | if (r == 0) { |
4452 | if (n_loop <= 1) | |
4453 | return 0; | |
4454 | ||
9a17484d | 4455 | return -ENXIO; |
430fb8fa | 4456 | } |
9a17484d | 4457 | |
fe1d424d | 4458 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
9a17484d LP |
4459 | if (r < 0) |
4460 | return r; | |
9a17484d | 4461 | |
fe1d424d LP |
4462 | types = s; |
4463 | n_struct = strlen(s); | |
4464 | n_array = (unsigned) -1; | |
4465 | ||
9a17484d LP |
4466 | break; |
4467 | } | |
4468 | ||
4469 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
4470 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
4471 | size_t k; | |
4472 | ||
4473 | r = signature_element_length(t, &k); | |
4474 | if (r < 0) | |
4475 | return r; | |
4476 | ||
4477 | { | |
4478 | char s[k - 1]; | |
4479 | memcpy(s, t + 1, k - 2); | |
4480 | s[k - 2] = 0; | |
4481 | ||
4482 | r = sd_bus_message_enter_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
4483 | if (r < 0) | |
4484 | return r; | |
430fb8fa LP |
4485 | if (r == 0) { |
4486 | if (n_loop <= 1) | |
4487 | return 0; | |
9a17484d | 4488 | return -ENXIO; |
430fb8fa | 4489 | } |
fe1d424d | 4490 | } |
9a17484d | 4491 | |
fe1d424d LP |
4492 | if (n_array == (unsigned) -1) { |
4493 | types += k - 1; | |
4494 | n_struct -= k - 1; | |
4495 | } | |
9a17484d | 4496 | |
fe1d424d LP |
4497 | r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array); |
4498 | if (r < 0) | |
4499 | return r; | |
9a17484d | 4500 | |
fe1d424d LP |
4501 | types = t + 1; |
4502 | n_struct = k - 2; | |
4503 | n_array = (unsigned) -1; | |
9a17484d LP |
4504 | |
4505 | break; | |
4506 | } | |
4507 | ||
4508 | default: | |
fe1d424d | 4509 | return -EINVAL; |
9a17484d | 4510 | } |
9a17484d LP |
4511 | } |
4512 | ||
4513 | return 1; | |
4514 | } | |
4515 | ||
d9f644e2 | 4516 | _public_ int sd_bus_message_read(sd_bus_message *m, const char *types, ...) { |
9a17484d LP |
4517 | va_list ap; |
4518 | int r; | |
4519 | ||
9a17484d | 4520 | va_start(ap, types); |
11ce0db2 | 4521 | r = sd_bus_message_readv(m, types, ap); |
9a17484d LP |
4522 | va_end(ap); |
4523 | ||
4524 | return r; | |
4525 | } | |
4526 | ||
d9f644e2 | 4527 | _public_ int sd_bus_message_skip(sd_bus_message *m, const char *types) { |
9b07511d LP |
4528 | int r; |
4529 | ||
4530 | assert_return(m, -EINVAL); | |
4531 | assert_return(m->sealed, -EPERM); | |
9b07511d | 4532 | |
d9fba533 LP |
4533 | /* If types is NULL, read exactly one element */ |
4534 | if (!types) { | |
4535 | struct bus_container *c; | |
4536 | size_t l; | |
4537 | ||
4538 | if (message_end_of_signature(m)) | |
4539 | return -ENXIO; | |
4540 | ||
4541 | if (message_end_of_array(m, m->rindex)) | |
4542 | return 0; | |
4543 | ||
9c65778d | 4544 | c = message_get_last_container(m); |
d9fba533 LP |
4545 | |
4546 | r = signature_element_length(c->signature + c->index, &l); | |
4547 | if (r < 0) | |
4548 | return r; | |
4549 | ||
4550 | types = strndupa(c->signature + c->index, l); | |
4551 | } | |
9b07511d LP |
4552 | |
4553 | switch (*types) { | |
4554 | ||
d9fba533 LP |
4555 | case 0: /* Nothing to drop */ |
4556 | return 0; | |
4557 | ||
9b07511d LP |
4558 | case SD_BUS_TYPE_BYTE: |
4559 | case SD_BUS_TYPE_BOOLEAN: | |
4560 | case SD_BUS_TYPE_INT16: | |
4561 | case SD_BUS_TYPE_UINT16: | |
4562 | case SD_BUS_TYPE_INT32: | |
4563 | case SD_BUS_TYPE_UINT32: | |
4564 | case SD_BUS_TYPE_INT64: | |
4565 | case SD_BUS_TYPE_UINT64: | |
4566 | case SD_BUS_TYPE_DOUBLE: | |
4567 | case SD_BUS_TYPE_STRING: | |
4568 | case SD_BUS_TYPE_OBJECT_PATH: | |
4569 | case SD_BUS_TYPE_SIGNATURE: | |
4570 | case SD_BUS_TYPE_UNIX_FD: | |
4571 | ||
4572 | r = sd_bus_message_read_basic(m, *types, NULL); | |
4573 | if (r <= 0) | |
4574 | return r; | |
4575 | ||
4576 | r = sd_bus_message_skip(m, types + 1); | |
4577 | if (r < 0) | |
4578 | return r; | |
4579 | ||
4580 | return 1; | |
4581 | ||
4582 | case SD_BUS_TYPE_ARRAY: { | |
4583 | size_t k; | |
4584 | ||
4585 | r = signature_element_length(types + 1, &k); | |
4586 | if (r < 0) | |
4587 | return r; | |
4588 | ||
4589 | { | |
4590 | char s[k+1]; | |
4591 | memcpy(s, types+1, k); | |
4592 | s[k] = 0; | |
4593 | ||
4594 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s); | |
4595 | if (r <= 0) | |
4596 | return r; | |
4597 | ||
4598 | for (;;) { | |
4599 | r = sd_bus_message_skip(m, s); | |
4600 | if (r < 0) | |
4601 | return r; | |
4602 | if (r == 0) | |
4603 | break; | |
4604 | } | |
4605 | ||
4606 | r = sd_bus_message_exit_container(m); | |
4607 | if (r < 0) | |
4608 | return r; | |
4609 | } | |
4610 | ||
4611 | r = sd_bus_message_skip(m, types + 1 + k); | |
4612 | if (r < 0) | |
4613 | return r; | |
4614 | ||
4615 | return 1; | |
4616 | } | |
4617 | ||
4618 | case SD_BUS_TYPE_VARIANT: { | |
4619 | const char *contents; | |
4620 | char x; | |
4621 | ||
4622 | r = sd_bus_message_peek_type(m, &x, &contents); | |
4623 | if (r <= 0) | |
4624 | return r; | |
4625 | ||
4626 | if (x != SD_BUS_TYPE_VARIANT) | |
4627 | return -ENXIO; | |
4628 | ||
4629 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents); | |
4630 | if (r <= 0) | |
4631 | return r; | |
4632 | ||
4633 | r = sd_bus_message_skip(m, contents); | |
4634 | if (r < 0) | |
4635 | return r; | |
4636 | assert(r != 0); | |
4637 | ||
4638 | r = sd_bus_message_exit_container(m); | |
4639 | if (r < 0) | |
4640 | return r; | |
4641 | ||
4642 | r = sd_bus_message_skip(m, types + 1); | |
4643 | if (r < 0) | |
4644 | return r; | |
4645 | ||
4646 | return 1; | |
4647 | } | |
4648 | ||
4649 | case SD_BUS_TYPE_STRUCT_BEGIN: | |
4650 | case SD_BUS_TYPE_DICT_ENTRY_BEGIN: { | |
4651 | size_t k; | |
4652 | ||
4653 | r = signature_element_length(types, &k); | |
4654 | if (r < 0) | |
4655 | return r; | |
4656 | ||
4657 | { | |
4658 | char s[k-1]; | |
4659 | memcpy(s, types+1, k-2); | |
4660 | s[k-2] = 0; | |
4661 | ||
4662 | r = sd_bus_message_enter_container(m, *types == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s); | |
4663 | if (r <= 0) | |
4664 | return r; | |
4665 | ||
4666 | r = sd_bus_message_skip(m, s); | |
4667 | if (r < 0) | |
4668 | return r; | |
9b07511d LP |
4669 | |
4670 | r = sd_bus_message_exit_container(m); | |
4671 | if (r < 0) | |
4672 | return r; | |
4673 | } | |
4674 | ||
4675 | r = sd_bus_message_skip(m, types + k); | |
4676 | if (r < 0) | |
4677 | return r; | |
4678 | ||
4679 | return 1; | |
4680 | } | |
4681 | ||
4682 | default: | |
4683 | return -EINVAL; | |
4684 | } | |
4685 | } | |
4686 | ||
2ac7c17f LP |
4687 | _public_ int sd_bus_message_read_array( |
4688 | sd_bus_message *m, | |
4689 | char type, | |
4690 | const void **ptr, | |
4691 | size_t *size) { | |
4692 | ||
b3af9646 LP |
4693 | struct bus_container *c; |
4694 | void *p; | |
4695 | size_t sz; | |
4696 | ssize_t align; | |
4697 | int r; | |
4698 | ||
9d6c7c82 LP |
4699 | assert_return(m, -EINVAL); |
4700 | assert_return(m->sealed, -EPERM); | |
4701 | assert_return(bus_type_is_trivial(type), -EINVAL); | |
4702 | assert_return(ptr, -EINVAL); | |
4703 | assert_return(size, -EINVAL); | |
15411c0c | 4704 | assert_return(!BUS_MESSAGE_NEED_BSWAP(m), -EOPNOTSUPP); |
b3af9646 | 4705 | |
b3af9646 | 4706 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type)); |
66b26c5c | 4707 | if (r <= 0) |
b3af9646 LP |
4708 | return r; |
4709 | ||
9c65778d | 4710 | c = message_get_last_container(m); |
6647dc66 LP |
4711 | |
4712 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
4713 | align = bus_gvariant_get_alignment(CHAR_TO_STR(type)); | |
4714 | if (align < 0) | |
4715 | return align; | |
4716 | ||
18f5b48f | 4717 | sz = c->end - c->begin; |
6647dc66 LP |
4718 | } else { |
4719 | align = bus_type_get_alignment(type); | |
4720 | if (align < 0) | |
4721 | return align; | |
4722 | ||
4723 | sz = BUS_MESSAGE_BSWAP32(m, *c->array_size); | |
4724 | } | |
b3af9646 | 4725 | |
5e86fd7b LP |
4726 | if (sz == 0) |
4727 | /* Zero length array, let's return some aligned | |
4728 | * pointer that is not NULL */ | |
0241c1c0 | 4729 | p = (uint8_t*) align; |
5e86fd7b LP |
4730 | else { |
4731 | r = message_peek_body(m, &m->rindex, align, sz, &p); | |
4732 | if (r < 0) | |
4733 | goto fail; | |
b3af9646 LP |
4734 | } |
4735 | ||
4736 | r = sd_bus_message_exit_container(m); | |
4737 | if (r < 0) | |
4738 | goto fail; | |
4739 | ||
4740 | *ptr = (const void*) p; | |
4741 | *size = sz; | |
4742 | ||
4743 | return 1; | |
4744 | ||
4745 | fail: | |
4746 | message_quit_container(m); | |
4747 | return r; | |
4748 | } | |
4749 | ||
80a46c73 LP |
4750 | static int message_peek_fields( |
4751 | sd_bus_message *m, | |
4752 | size_t *rindex, | |
4753 | size_t align, | |
4754 | size_t nbytes, | |
4755 | void **ret) { | |
4756 | ||
4757 | assert(m); | |
4758 | assert(rindex); | |
4759 | assert(align > 0); | |
4760 | ||
2ac7c17f | 4761 | return buffer_peek(BUS_MESSAGE_FIELDS(m), m->fields_size, rindex, align, nbytes, ret); |
80a46c73 LP |
4762 | } |
4763 | ||
9f26c90c LP |
4764 | static int message_peek_field_uint32( |
4765 | sd_bus_message *m, | |
4766 | size_t *ri, | |
6647dc66 | 4767 | size_t item_size, |
9f26c90c LP |
4768 | uint32_t *ret) { |
4769 | ||
4770 | int r; | |
4771 | void *q; | |
4772 | ||
4773 | assert(m); | |
4774 | assert(ri); | |
4775 | ||
6647dc66 LP |
4776 | if (BUS_MESSAGE_IS_GVARIANT(m) && item_size != 4) |
4777 | return -EBADMSG; | |
4778 | ||
4779 | /* identical for gvariant and dbus1 */ | |
4780 | ||
9f26c90c LP |
4781 | r = message_peek_fields(m, ri, 4, 4, &q); |
4782 | if (r < 0) | |
4783 | return r; | |
4784 | ||
4785 | if (ret) | |
4786 | *ret = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q); | |
4787 | ||
4788 | return 0; | |
4789 | } | |
4790 | ||
2ac7c17f LP |
4791 | static int message_peek_field_uint64( |
4792 | sd_bus_message *m, | |
4793 | size_t *ri, | |
4794 | size_t item_size, | |
4795 | uint64_t *ret) { | |
4796 | ||
4797 | int r; | |
4798 | void *q; | |
4799 | ||
4800 | assert(m); | |
4801 | assert(ri); | |
4802 | ||
4803 | if (BUS_MESSAGE_IS_GVARIANT(m) && item_size != 8) | |
4804 | return -EBADMSG; | |
4805 | ||
4806 | /* identical for gvariant and dbus1 */ | |
4807 | ||
4808 | r = message_peek_fields(m, ri, 8, 8, &q); | |
4809 | if (r < 0) | |
4810 | return r; | |
4811 | ||
4812 | if (ret) | |
4813 | *ret = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q); | |
4814 | ||
4815 | return 0; | |
4816 | } | |
4817 | ||
80a46c73 LP |
4818 | static int message_peek_field_string( |
4819 | sd_bus_message *m, | |
6693860f | 4820 | bool (*validate)(const char *p), |
80a46c73 | 4821 | size_t *ri, |
6647dc66 | 4822 | size_t item_size, |
80a46c73 LP |
4823 | const char **ret) { |
4824 | ||
9f26c90c | 4825 | uint32_t l; |
80a46c73 LP |
4826 | int r; |
4827 | void *q; | |
4828 | ||
9a17484d | 4829 | assert(m); |
80a46c73 LP |
4830 | assert(ri); |
4831 | ||
6647dc66 | 4832 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
80a46c73 | 4833 | |
6647dc66 LP |
4834 | if (item_size <= 0) |
4835 | return -EBADMSG; | |
4836 | ||
4837 | r = message_peek_fields(m, ri, 1, item_size, &q); | |
4838 | if (r < 0) | |
4839 | return r; | |
4840 | ||
4841 | l = item_size - 1; | |
4842 | } else { | |
4843 | r = message_peek_field_uint32(m, ri, 4, &l); | |
4844 | if (r < 0) | |
4845 | return r; | |
4846 | ||
902000c1 ZJS |
4847 | if (l == UINT32_MAX) |
4848 | /* avoid overflow right below */ | |
4849 | return -EBADMSG; | |
4850 | ||
6647dc66 LP |
4851 | r = message_peek_fields(m, ri, 1, l+1, &q); |
4852 | if (r < 0) | |
4853 | return r; | |
4854 | } | |
9a17484d | 4855 | |
6693860f LP |
4856 | if (validate) { |
4857 | if (!validate_nul(q, l)) | |
4858 | return -EBADMSG; | |
4859 | ||
4860 | if (!validate(q)) | |
ac89bf1d LP |
4861 | return -EBADMSG; |
4862 | } else { | |
4863 | if (!validate_string(q, l)) | |
4864 | return -EBADMSG; | |
4865 | } | |
80a46c73 LP |
4866 | |
4867 | if (ret) | |
4868 | *ret = q; | |
4869 | ||
4870 | return 0; | |
4871 | } | |
4872 | ||
4873 | static int message_peek_field_signature( | |
4874 | sd_bus_message *m, | |
4875 | size_t *ri, | |
6647dc66 | 4876 | size_t item_size, |
80a46c73 LP |
4877 | const char **ret) { |
4878 | ||
4879 | size_t l; | |
4880 | int r; | |
4881 | void *q; | |
4882 | ||
4883 | assert(m); | |
4884 | assert(ri); | |
4885 | ||
6647dc66 | 4886 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
80a46c73 | 4887 | |
6647dc66 LP |
4888 | if (item_size <= 0) |
4889 | return -EBADMSG; | |
4890 | ||
4891 | r = message_peek_fields(m, ri, 1, item_size, &q); | |
4892 | if (r < 0) | |
4893 | return r; | |
4894 | ||
4895 | l = item_size - 1; | |
4896 | } else { | |
4897 | r = message_peek_fields(m, ri, 1, 1, &q); | |
4898 | if (r < 0) | |
4899 | return r; | |
4900 | ||
4901 | l = *(uint8_t*) q; | |
902000c1 ZJS |
4902 | if (l == UINT8_MAX) |
4903 | /* avoid overflow right below */ | |
4904 | return -EBADMSG; | |
4905 | ||
6647dc66 LP |
4906 | r = message_peek_fields(m, ri, 1, l+1, &q); |
4907 | if (r < 0) | |
4908 | return r; | |
4909 | } | |
80a46c73 LP |
4910 | |
4911 | if (!validate_signature(q, l)) | |
4912 | return -EBADMSG; | |
4913 | ||
4914 | if (ret) | |
4915 | *ret = q; | |
4916 | ||
4917 | return 0; | |
4918 | } | |
4919 | ||
80a46c73 LP |
4920 | static int message_skip_fields( |
4921 | sd_bus_message *m, | |
4922 | size_t *ri, | |
4923 | uint32_t array_size, | |
4924 | const char **signature) { | |
4925 | ||
4926 | size_t original_index; | |
4927 | int r; | |
4928 | ||
4929 | assert(m); | |
4930 | assert(ri); | |
4931 | assert(signature); | |
6647dc66 | 4932 | assert(!BUS_MESSAGE_IS_GVARIANT(m)); |
80a46c73 LP |
4933 | |
4934 | original_index = *ri; | |
4935 | ||
4936 | for (;;) { | |
4937 | char t; | |
80a46c73 LP |
4938 | size_t l; |
4939 | ||
4940 | if (array_size != (uint32_t) -1 && | |
4941 | array_size <= *ri - original_index) | |
4942 | return 0; | |
4943 | ||
4944 | t = **signature; | |
4945 | if (!t) | |
4946 | return 0; | |
4947 | ||
6693860f LP |
4948 | if (t == SD_BUS_TYPE_STRING) { |
4949 | ||
6647dc66 | 4950 | r = message_peek_field_string(m, NULL, ri, 0, NULL); |
6693860f LP |
4951 | if (r < 0) |
4952 | return r; | |
4953 | ||
4954 | (*signature)++; | |
4955 | ||
4956 | } else if (t == SD_BUS_TYPE_OBJECT_PATH) { | |
80a46c73 | 4957 | |
6647dc66 | 4958 | r = message_peek_field_string(m, object_path_is_valid, ri, 0, NULL); |
80a46c73 LP |
4959 | if (r < 0) |
4960 | return r; | |
4961 | ||
4962 | (*signature)++; | |
4963 | ||
4964 | } else if (t == SD_BUS_TYPE_SIGNATURE) { | |
4965 | ||
6647dc66 | 4966 | r = message_peek_field_signature(m, ri, 0, NULL); |
80a46c73 LP |
4967 | if (r < 0) |
4968 | return r; | |
4969 | ||
4970 | (*signature)++; | |
4971 | ||
4972 | } else if (bus_type_is_basic(t)) { | |
27f6e5c7 | 4973 | ssize_t align, k; |
80a46c73 | 4974 | |
c66a2e0c TG |
4975 | align = bus_type_get_alignment(t); |
4976 | k = bus_type_get_size(t); | |
27f6e5c7 | 4977 | assert(align > 0 && k > 0); |
80a46c73 LP |
4978 | |
4979 | r = message_peek_fields(m, ri, align, k, NULL); | |
4980 | if (r < 0) | |
4981 | return r; | |
9a17484d | 4982 | |
80a46c73 LP |
4983 | (*signature)++; |
4984 | ||
4985 | } else if (t == SD_BUS_TYPE_ARRAY) { | |
4986 | ||
73777ddb | 4987 | r = signature_element_length(*signature + 1, &l); |
80a46c73 LP |
4988 | if (r < 0) |
4989 | return r; | |
4990 | ||
4991 | assert(l >= 1); | |
4992 | { | |
73777ddb | 4993 | char sig[l + 1], *s = sig; |
9f26c90c | 4994 | uint32_t nas; |
80a46c73 LP |
4995 | int alignment; |
4996 | ||
73777ddb ZJS |
4997 | strncpy(sig, *signature + 1, l); |
4998 | sig[l] = '\0'; | |
80a46c73 LP |
4999 | |
5000 | alignment = bus_type_get_alignment(sig[0]); | |
5001 | if (alignment < 0) | |
5002 | return alignment; | |
5003 | ||
6647dc66 | 5004 | r = message_peek_field_uint32(m, ri, 0, &nas); |
80a46c73 LP |
5005 | if (r < 0) |
5006 | return r; | |
ac89bf1d | 5007 | if (nas > BUS_ARRAY_MAX_SIZE) |
80a46c73 LP |
5008 | return -EBADMSG; |
5009 | ||
5010 | r = message_peek_fields(m, ri, alignment, 0, NULL); | |
5011 | if (r < 0) | |
5012 | return r; | |
5013 | ||
5014 | r = message_skip_fields(m, ri, nas, (const char**) &s); | |
5015 | if (r < 0) | |
5016 | return r; | |
5017 | } | |
5018 | ||
5019 | (*signature) += 1 + l; | |
5020 | ||
5021 | } else if (t == SD_BUS_TYPE_VARIANT) { | |
5022 | const char *s; | |
5023 | ||
6647dc66 | 5024 | r = message_peek_field_signature(m, ri, 0, &s); |
80a46c73 LP |
5025 | if (r < 0) |
5026 | return r; | |
5027 | ||
5028 | r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s); | |
5029 | if (r < 0) | |
5030 | return r; | |
5031 | ||
5032 | (*signature)++; | |
5033 | ||
945c2931 | 5034 | } else if (IN_SET(t, SD_BUS_TYPE_STRUCT, SD_BUS_TYPE_DICT_ENTRY)) { |
80a46c73 LP |
5035 | |
5036 | r = signature_element_length(*signature, &l); | |
5037 | if (r < 0) | |
5038 | return r; | |
5039 | ||
5040 | assert(l >= 2); | |
5041 | { | |
3d338a30 ZJS |
5042 | char sig[l + 1], *s = sig; |
5043 | strncpy(sig, *signature + 1, l); | |
5044 | sig[l] = '\0'; | |
80a46c73 LP |
5045 | |
5046 | r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s); | |
5047 | if (r < 0) | |
5048 | return r; | |
5049 | } | |
5050 | ||
5051 | *signature += l; | |
5052 | } else | |
d831fb6f | 5053 | return -EBADMSG; |
80a46c73 LP |
5054 | } |
5055 | } | |
5056 | ||
6629161f | 5057 | int bus_message_parse_fields(sd_bus_message *m) { |
80a46c73 LP |
5058 | size_t ri; |
5059 | int r; | |
2c93b4ef | 5060 | uint32_t unix_fds = 0; |
5a4d665a | 5061 | bool unix_fds_set = false; |
6647dc66 LP |
5062 | void *offsets = NULL; |
5063 | unsigned n_offsets = 0; | |
8f2e44f8 | 5064 | size_t sz = 0; |
6647dc66 | 5065 | unsigned i = 0; |
80a46c73 LP |
5066 | |
5067 | assert(m); | |
5068 | ||
6647dc66 | 5069 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
2ac7c17f LP |
5070 | char *p; |
5071 | ||
5072 | /* Read the signature from the end of the body variant first */ | |
5073 | sz = bus_gvariant_determine_word_size(BUS_MESSAGE_SIZE(m), 0); | |
5074 | if (m->footer_accessible < 1 + sz) | |
5075 | return -EBADMSG; | |
5076 | ||
5077 | p = (char*) m->footer + m->footer_accessible - (1 + sz); | |
5078 | for (;;) { | |
5079 | if (p < (char*) m->footer) | |
5080 | return -EBADMSG; | |
5081 | ||
5082 | if (*p == 0) { | |
ac0a94f7 | 5083 | char *k; |
03ebf5e8 | 5084 | size_t l; |
2ac7c17f | 5085 | |
03ebf5e8 DH |
5086 | /* We found the beginning of the signature |
5087 | * string, yay! We require the body to be a | |
5088 | * structure, so verify it and then strip the | |
5089 | * opening/closing brackets. */ | |
2ac7c17f | 5090 | |
7f546026 | 5091 | l = (char*) m->footer + m->footer_accessible - p - (1 + sz); |
03ebf5e8 DH |
5092 | if (l < 2 || |
5093 | p[1] != SD_BUS_TYPE_STRUCT_BEGIN || | |
5094 | p[1 + l - 1] != SD_BUS_TYPE_STRUCT_END) | |
5095 | return -EBADMSG; | |
5096 | ||
ac0a94f7 LP |
5097 | k = memdup_suffix0(p + 1 + 1, l - 2); |
5098 | if (!k) | |
2ac7c17f | 5099 | return -ENOMEM; |
ac0a94f7 LP |
5100 | |
5101 | free_and_replace(m->root_container.signature, k); | |
2ac7c17f LP |
5102 | break; |
5103 | } | |
6647dc66 | 5104 | |
2ac7c17f LP |
5105 | p--; |
5106 | } | |
5107 | ||
5108 | /* Calculate the actual user body size, by removing | |
5109 | * the trailing variant signature and struct offset | |
5110 | * table */ | |
5111 | m->user_body_size = m->body_size - ((char*) m->footer + m->footer_accessible - p); | |
5112 | ||
5113 | /* Pull out the offset table for the fields array */ | |
5114 | sz = bus_gvariant_determine_word_size(m->fields_size, 0); | |
6647dc66 LP |
5115 | if (sz > 0) { |
5116 | size_t framing; | |
2ac7c17f | 5117 | void *q; |
6647dc66 | 5118 | |
2ac7c17f | 5119 | ri = m->fields_size - sz; |
6647dc66 LP |
5120 | r = message_peek_fields(m, &ri, 1, sz, &q); |
5121 | if (r < 0) | |
5122 | return r; | |
5123 | ||
2ac7c17f LP |
5124 | framing = bus_gvariant_read_word_le(q, sz); |
5125 | if (framing >= m->fields_size - sz) | |
6647dc66 | 5126 | return -EBADMSG; |
2ac7c17f | 5127 | if ((m->fields_size - framing) % sz != 0) |
6647dc66 LP |
5128 | return -EBADMSG; |
5129 | ||
5130 | ri = framing; | |
2ac7c17f | 5131 | r = message_peek_fields(m, &ri, 1, m->fields_size - framing, &offsets); |
6647dc66 LP |
5132 | if (r < 0) |
5133 | return r; | |
5134 | ||
2ac7c17f | 5135 | n_offsets = (m->fields_size - framing) / sz; |
6647dc66 | 5136 | } |
2ac7c17f LP |
5137 | } else |
5138 | m->user_body_size = m->body_size; | |
6647dc66 LP |
5139 | |
5140 | ri = 0; | |
2ac7c17f | 5141 | while (ri < m->fields_size) { |
6647dc66 | 5142 | _cleanup_free_ char *sig = NULL; |
80a46c73 | 5143 | const char *signature; |
2ac7c17f | 5144 | uint64_t field_type; |
6647dc66 LP |
5145 | size_t item_size = (size_t) -1; |
5146 | ||
5147 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
2ac7c17f LP |
5148 | uint64_t *u64; |
5149 | ||
6647dc66 LP |
5150 | if (i >= n_offsets) |
5151 | break; | |
5152 | ||
5153 | if (i == 0) | |
5154 | ri = 0; | |
5155 | else | |
2ac7c17f | 5156 | ri = ALIGN_TO(bus_gvariant_read_word_le((uint8_t*) offsets + (i-1)*sz, sz), 8); |
80a46c73 | 5157 | |
2ac7c17f LP |
5158 | r = message_peek_fields(m, &ri, 8, 8, (void**) &u64); |
5159 | if (r < 0) | |
5160 | return r; | |
5161 | ||
5162 | field_type = BUS_MESSAGE_BSWAP64(m, *u64); | |
5163 | } else { | |
5164 | uint8_t *u8; | |
5165 | ||
5166 | r = message_peek_fields(m, &ri, 8, 1, (void**) &u8); | |
5167 | if (r < 0) | |
5168 | return r; | |
5169 | ||
5170 | field_type = *u8; | |
5171 | } | |
954871d8 | 5172 | |
6647dc66 LP |
5173 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
5174 | size_t where, end; | |
5175 | char *b; | |
5176 | void *q; | |
5177 | ||
2ac7c17f | 5178 | end = bus_gvariant_read_word_le((uint8_t*) offsets + i*sz, sz); |
6647dc66 LP |
5179 | |
5180 | if (end < ri) | |
5181 | return -EBADMSG; | |
5182 | ||
5183 | where = ri = ALIGN_TO(ri, 8); | |
5184 | item_size = end - ri; | |
5185 | r = message_peek_fields(m, &where, 1, item_size, &q); | |
5186 | if (r < 0) | |
5187 | return r; | |
5188 | ||
5189 | b = memrchr(q, 0, item_size); | |
5190 | if (!b) | |
5191 | return -EBADMSG; | |
5192 | ||
5193 | sig = strndup(b+1, item_size - (b+1-(char*) q)); | |
5194 | if (!sig) | |
5195 | return -ENOMEM; | |
5196 | ||
5197 | signature = sig; | |
5198 | item_size = b - (char*) q; | |
5199 | } else { | |
5200 | r = message_peek_field_signature(m, &ri, 0, &signature); | |
5201 | if (r < 0) | |
5202 | return r; | |
5203 | } | |
80a46c73 | 5204 | |
2ac7c17f LP |
5205 | switch (field_type) { |
5206 | ||
0461f8cd | 5207 | case _BUS_MESSAGE_HEADER_INVALID: |
80a46c73 LP |
5208 | return -EBADMSG; |
5209 | ||
0461f8cd | 5210 | case BUS_MESSAGE_HEADER_PATH: |
2c93b4ef LP |
5211 | |
5212 | if (m->path) | |
5213 | return -EBADMSG; | |
5214 | ||
80a46c73 LP |
5215 | if (!streq(signature, "o")) |
5216 | return -EBADMSG; | |
5217 | ||
6647dc66 | 5218 | r = message_peek_field_string(m, object_path_is_valid, &ri, item_size, &m->path); |
80a46c73 LP |
5219 | break; |
5220 | ||
0461f8cd | 5221 | case BUS_MESSAGE_HEADER_INTERFACE: |
2c93b4ef LP |
5222 | |
5223 | if (m->interface) | |
5224 | return -EBADMSG; | |
5225 | ||
80a46c73 LP |
5226 | if (!streq(signature, "s")) |
5227 | return -EBADMSG; | |
5228 | ||
6647dc66 | 5229 | r = message_peek_field_string(m, interface_name_is_valid, &ri, item_size, &m->interface); |
80a46c73 LP |
5230 | break; |
5231 | ||
0461f8cd | 5232 | case BUS_MESSAGE_HEADER_MEMBER: |
2c93b4ef LP |
5233 | |
5234 | if (m->member) | |
5235 | return -EBADMSG; | |
5236 | ||
80a46c73 LP |
5237 | if (!streq(signature, "s")) |
5238 | return -EBADMSG; | |
5239 | ||
6647dc66 | 5240 | r = message_peek_field_string(m, member_name_is_valid, &ri, item_size, &m->member); |
80a46c73 LP |
5241 | break; |
5242 | ||
0461f8cd | 5243 | case BUS_MESSAGE_HEADER_ERROR_NAME: |
2c93b4ef LP |
5244 | |
5245 | if (m->error.name) | |
5246 | return -EBADMSG; | |
5247 | ||
80a46c73 LP |
5248 | if (!streq(signature, "s")) |
5249 | return -EBADMSG; | |
5250 | ||
6647dc66 | 5251 | r = message_peek_field_string(m, error_name_is_valid, &ri, item_size, &m->error.name); |
79f8d3d2 LP |
5252 | if (r >= 0) |
5253 | m->error._need_free = -1; | |
5254 | ||
80a46c73 LP |
5255 | break; |
5256 | ||
0461f8cd | 5257 | case BUS_MESSAGE_HEADER_DESTINATION: |
2c93b4ef LP |
5258 | |
5259 | if (m->destination) | |
5260 | return -EBADMSG; | |
5261 | ||
80a46c73 LP |
5262 | if (!streq(signature, "s")) |
5263 | return -EBADMSG; | |
5264 | ||
6647dc66 | 5265 | r = message_peek_field_string(m, service_name_is_valid, &ri, item_size, &m->destination); |
80a46c73 LP |
5266 | break; |
5267 | ||
0461f8cd | 5268 | case BUS_MESSAGE_HEADER_SENDER: |
2c93b4ef LP |
5269 | |
5270 | if (m->sender) | |
5271 | return -EBADMSG; | |
5272 | ||
80a46c73 LP |
5273 | if (!streq(signature, "s")) |
5274 | return -EBADMSG; | |
5275 | ||
6647dc66 | 5276 | r = message_peek_field_string(m, service_name_is_valid, &ri, item_size, &m->sender); |
49b832c5 | 5277 | |
a132bef0 | 5278 | if (r >= 0 && m->sender[0] == ':' && m->bus->bus_client) { |
49b832c5 LP |
5279 | m->creds.unique_name = (char*) m->sender; |
5280 | m->creds.mask |= SD_BUS_CREDS_UNIQUE_NAME & m->bus->creds_mask; | |
5281 | } | |
5282 | ||
80a46c73 LP |
5283 | break; |
5284 | ||
0461f8cd | 5285 | case BUS_MESSAGE_HEADER_SIGNATURE: { |
80a46c73 LP |
5286 | const char *s; |
5287 | char *c; | |
5288 | ||
2ac7c17f LP |
5289 | if (BUS_MESSAGE_IS_GVARIANT(m)) /* only applies to dbus1 */ |
5290 | return -EBADMSG; | |
5291 | ||
2c93b4ef LP |
5292 | if (m->root_container.signature) |
5293 | return -EBADMSG; | |
5294 | ||
80a46c73 LP |
5295 | if (!streq(signature, "g")) |
5296 | return -EBADMSG; | |
5297 | ||
6647dc66 | 5298 | r = message_peek_field_signature(m, &ri, item_size, &s); |
80a46c73 LP |
5299 | if (r < 0) |
5300 | return r; | |
5301 | ||
5302 | c = strdup(s); | |
5303 | if (!c) | |
5304 | return -ENOMEM; | |
5305 | ||
7a4b8512 | 5306 | free_and_replace(m->root_container.signature, c); |
80a46c73 LP |
5307 | break; |
5308 | } | |
5309 | ||
2ac7c17f | 5310 | case BUS_MESSAGE_HEADER_REPLY_SERIAL: |
42c4ebcb | 5311 | |
693eb9a2 | 5312 | if (m->reply_cookie != 0) |
2c93b4ef LP |
5313 | return -EBADMSG; |
5314 | ||
2ac7c17f LP |
5315 | if (BUS_MESSAGE_IS_GVARIANT(m)) { |
5316 | /* 64bit on dbus2 */ | |
6693860f | 5317 | |
2ac7c17f LP |
5318 | if (!streq(signature, "t")) |
5319 | return -EBADMSG; | |
5320 | ||
5321 | r = message_peek_field_uint64(m, &ri, item_size, &m->reply_cookie); | |
5322 | if (r < 0) | |
5323 | return r; | |
5324 | } else { | |
5325 | /* 32bit on dbus1 */ | |
5326 | uint32_t serial; | |
5327 | ||
5328 | if (!streq(signature, "u")) | |
5329 | return -EBADMSG; | |
b381de41 | 5330 | |
2ac7c17f LP |
5331 | r = message_peek_field_uint32(m, &ri, item_size, &serial); |
5332 | if (r < 0) | |
5333 | return r; | |
5334 | ||
5335 | m->reply_cookie = serial; | |
5336 | } | |
42c4ebcb | 5337 | |
693eb9a2 | 5338 | if (m->reply_cookie == 0) |
6693860f LP |
5339 | return -EBADMSG; |
5340 | ||
80a46c73 LP |
5341 | break; |
5342 | ||
0461f8cd | 5343 | case BUS_MESSAGE_HEADER_UNIX_FDS: |
5a4d665a | 5344 | if (unix_fds_set) |
2c93b4ef LP |
5345 | return -EBADMSG; |
5346 | ||
5347 | if (!streq(signature, "u")) | |
5348 | return -EBADMSG; | |
5349 | ||
6647dc66 | 5350 | r = message_peek_field_uint32(m, &ri, item_size, &unix_fds); |
2c93b4ef LP |
5351 | if (r < 0) |
5352 | return -EBADMSG; | |
5353 | ||
5a4d665a | 5354 | unix_fds_set = true; |
2c93b4ef LP |
5355 | break; |
5356 | ||
80a46c73 | 5357 | default: |
6647dc66 LP |
5358 | if (!BUS_MESSAGE_IS_GVARIANT(m)) |
5359 | r = message_skip_fields(m, &ri, (uint32_t) -1, (const char **) &signature); | |
80a46c73 LP |
5360 | } |
5361 | ||
5362 | if (r < 0) | |
5363 | return r; | |
6647dc66 LP |
5364 | |
5365 | i++; | |
80a46c73 LP |
5366 | } |
5367 | ||
2c93b4ef LP |
5368 | if (m->n_fds != unix_fds) |
5369 | return -EBADMSG; | |
5370 | ||
80a46c73 LP |
5371 | switch (m->header->type) { |
5372 | ||
40ca29a1 | 5373 | case SD_BUS_MESSAGE_SIGNAL: |
80a46c73 LP |
5374 | if (!m->path || !m->interface || !m->member) |
5375 | return -EBADMSG; | |
7fa934b0 LP |
5376 | |
5377 | if (m->reply_cookie != 0) | |
5378 | return -EBADMSG; | |
5379 | ||
80a46c73 LP |
5380 | break; |
5381 | ||
40ca29a1 | 5382 | case SD_BUS_MESSAGE_METHOD_CALL: |
80a46c73 LP |
5383 | |
5384 | if (!m->path || !m->member) | |
5385 | return -EBADMSG; | |
5386 | ||
7fa934b0 LP |
5387 | if (m->reply_cookie != 0) |
5388 | return -EBADMSG; | |
5389 | ||
80a46c73 LP |
5390 | break; |
5391 | ||
40ca29a1 | 5392 | case SD_BUS_MESSAGE_METHOD_RETURN: |
80a46c73 | 5393 | |
693eb9a2 | 5394 | if (m->reply_cookie == 0) |
80a46c73 LP |
5395 | return -EBADMSG; |
5396 | break; | |
5397 | ||
40ca29a1 | 5398 | case SD_BUS_MESSAGE_METHOD_ERROR: |
80a46c73 | 5399 | |
693eb9a2 | 5400 | if (m->reply_cookie == 0 || !m->error.name) |
80a46c73 LP |
5401 | return -EBADMSG; |
5402 | break; | |
5403 | } | |
9a17484d | 5404 | |
35473296 LP |
5405 | /* Refuse non-local messages that claim they are local */ |
5406 | if (streq_ptr(m->path, "/org/freedesktop/DBus/Local")) | |
5407 | return -EBADMSG; | |
5408 | if (streq_ptr(m->interface, "org.freedesktop.DBus.Local")) | |
5409 | return -EBADMSG; | |
5410 | if (streq_ptr(m->sender, "org.freedesktop.DBus.Local")) | |
5411 | return -EBADMSG; | |
5412 | ||
2ac7c17f | 5413 | m->root_container.end = m->user_body_size; |
6647dc66 LP |
5414 | |
5415 | if (BUS_MESSAGE_IS_GVARIANT(m)) { | |
5416 | r = build_struct_offsets( | |
5417 | m, | |
5418 | m->root_container.signature, | |
2ac7c17f | 5419 | m->user_body_size, |
6647dc66 LP |
5420 | &m->root_container.item_size, |
5421 | &m->root_container.offsets, | |
5422 | &m->root_container.n_offsets); | |
69bd42ca ZJS |
5423 | if (r == -EINVAL) |
5424 | return -EBADMSG; | |
6647dc66 LP |
5425 | if (r < 0) |
5426 | return r; | |
5427 | } | |
5428 | ||
89ffcd2a | 5429 | /* Try to read the error message, but if we can't it's a non-issue */ |
40ca29a1 | 5430 | if (m->header->type == SD_BUS_MESSAGE_METHOD_ERROR) |
d3839740 | 5431 | (void) sd_bus_message_read(m, "s", &m->error.message); |
89ffcd2a | 5432 | |
9a17484d LP |
5433 | return 0; |
5434 | } | |
5435 | ||
d9f644e2 | 5436 | _public_ int sd_bus_message_set_destination(sd_bus_message *m, const char *destination) { |
9d6c7c82 LP |
5437 | assert_return(m, -EINVAL); |
5438 | assert_return(destination, -EINVAL); | |
3d51a011 | 5439 | assert_return(service_name_is_valid(destination), -EINVAL); |
9d6c7c82 LP |
5440 | assert_return(!m->sealed, -EPERM); |
5441 | assert_return(!m->destination, -EEXIST); | |
9a17484d | 5442 | |
0461f8cd | 5443 | return message_append_field_string(m, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &m->destination); |
9a17484d LP |
5444 | } |
5445 | ||
48ef41a3 LP |
5446 | _public_ int sd_bus_message_set_sender(sd_bus_message *m, const char *sender) { |
5447 | assert_return(m, -EINVAL); | |
5448 | assert_return(sender, -EINVAL); | |
3d51a011 | 5449 | assert_return(service_name_is_valid(sender), -EINVAL); |
48ef41a3 LP |
5450 | assert_return(!m->sealed, -EPERM); |
5451 | assert_return(!m->sender, -EEXIST); | |
5452 | ||
5453 | return message_append_field_string(m, BUS_MESSAGE_HEADER_SENDER, SD_BUS_TYPE_STRING, sender, &m->sender); | |
5454 | } | |
5455 | ||
de1c301e LP |
5456 | int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz) { |
5457 | size_t total; | |
de1c301e | 5458 | void *p, *e; |
da6053d0 | 5459 | size_t i; |
bc7fd8cd | 5460 | struct bus_body_part *part; |
de1c301e LP |
5461 | |
5462 | assert(m); | |
5463 | assert(buffer); | |
5464 | assert(sz); | |
5465 | ||
6629161f | 5466 | total = BUS_MESSAGE_SIZE(m); |
de1c301e LP |
5467 | |
5468 | p = malloc(total); | |
5469 | if (!p) | |
5470 | return -ENOMEM; | |
5471 | ||
c91cb83c | 5472 | e = mempcpy(p, m->header, BUS_MESSAGE_BODY_BEGIN(m)); |
9b29bb68 | 5473 | MESSAGE_FOREACH_PART(part, i, m) |
bc7fd8cd | 5474 | e = mempcpy(e, part->data, part->size); |
2100fa10 LP |
5475 | |
5476 | assert(total == (size_t) ((uint8_t*) e - (uint8_t*) p)); | |
de1c301e LP |
5477 | |
5478 | *buffer = p; | |
5479 | *sz = total; | |
5480 | ||
5481 | return 0; | |
5482 | } | |
89ffcd2a LP |
5483 | |
5484 | int bus_message_read_strv_extend(sd_bus_message *m, char ***l) { | |
43ef7603 | 5485 | const char *s; |
89ffcd2a LP |
5486 | int r; |
5487 | ||
5488 | assert(m); | |
5489 | assert(l); | |
5490 | ||
5491 | r = sd_bus_message_enter_container(m, 'a', "s"); | |
4686d1b6 | 5492 | if (r <= 0) |
89ffcd2a LP |
5493 | return r; |
5494 | ||
43ef7603 | 5495 | while ((r = sd_bus_message_read_basic(m, 's', &s)) > 0) { |
89ffcd2a LP |
5496 | r = strv_extend(l, s); |
5497 | if (r < 0) | |
5498 | return r; | |
5499 | } | |
43ef7603 DH |
5500 | if (r < 0) |
5501 | return r; | |
89ffcd2a LP |
5502 | |
5503 | r = sd_bus_message_exit_container(m); | |
5504 | if (r < 0) | |
5505 | return r; | |
5506 | ||
405cd3aa | 5507 | return 1; |
89ffcd2a | 5508 | } |
392d5b37 | 5509 | |
ba341e7c | 5510 | _public_ int sd_bus_message_read_strv(sd_bus_message *m, char ***l) { |
7a4b8512 | 5511 | _cleanup_strv_free_ char **strv = NULL; |
4686d1b6 MAP |
5512 | int r; |
5513 | ||
5514 | assert_return(m, -EINVAL); | |
5515 | assert_return(m->sealed, -EPERM); | |
5516 | assert_return(l, -EINVAL); | |
5517 | ||
5518 | r = bus_message_read_strv_extend(m, &strv); | |
7a4b8512 | 5519 | if (r <= 0) |
4686d1b6 | 5520 | return r; |
4686d1b6 | 5521 | |
7a4b8512 | 5522 | *l = TAKE_PTR(strv); |
4686d1b6 MAP |
5523 | return 1; |
5524 | } | |
5525 | ||
eccd47c5 LP |
5526 | static int bus_message_get_arg_skip( |
5527 | sd_bus_message *m, | |
5528 | unsigned i, | |
5529 | char *_type, | |
5530 | const char **_contents) { | |
5531 | ||
42c5aaf3 | 5532 | unsigned j; |
198b158f | 5533 | int r; |
392d5b37 | 5534 | |
392d5b37 LP |
5535 | r = sd_bus_message_rewind(m, true); |
5536 | if (r < 0) | |
198b158f | 5537 | return r; |
392d5b37 | 5538 | |
198b158f | 5539 | for (j = 0;; j++) { |
eccd47c5 LP |
5540 | const char *contents; |
5541 | char type; | |
5542 | ||
198b158f LP |
5543 | r = sd_bus_message_peek_type(m, &type, &contents); |
5544 | if (r < 0) | |
5545 | return r; | |
5546 | if (r == 0) | |
5547 | return -ENXIO; | |
5548 | ||
5549 | /* Don't match against arguments after the first one we don't understand */ | |
5550 | if (!IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE) && | |
5551 | !(type == SD_BUS_TYPE_ARRAY && STR_IN_SET(contents, "s", "o", "g"))) | |
5552 | return -ENXIO; | |
42c5aaf3 | 5553 | |
eccd47c5 LP |
5554 | if (j >= i) { |
5555 | if (_contents) | |
5556 | *_contents = contents; | |
5557 | if (_type) | |
5558 | *_type = type; | |
5559 | return 0; | |
5560 | } | |
198b158f LP |
5561 | |
5562 | r = sd_bus_message_skip(m, NULL); | |
392d5b37 | 5563 | if (r < 0) |
198b158f LP |
5564 | return r; |
5565 | } | |
392d5b37 | 5566 | |
eccd47c5 | 5567 | } |
392d5b37 | 5568 | |
eccd47c5 LP |
5569 | int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str) { |
5570 | char type; | |
5571 | int r; | |
198b158f | 5572 | |
eccd47c5 LP |
5573 | assert(m); |
5574 | assert(str); | |
198b158f | 5575 | |
eccd47c5 LP |
5576 | r = bus_message_get_arg_skip(m, i, &type, NULL); |
5577 | if (r < 0) | |
5578 | return r; | |
198b158f | 5579 | |
eccd47c5 LP |
5580 | if (!IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE)) |
5581 | return -ENXIO; | |
392d5b37 | 5582 | |
eccd47c5 LP |
5583 | return sd_bus_message_read_basic(m, type, str); |
5584 | } | |
5585 | ||
5586 | int bus_message_get_arg_strv(sd_bus_message *m, unsigned i, char ***strv) { | |
5587 | const char *contents; | |
5588 | char type; | |
5589 | int r; | |
5590 | ||
5591 | assert(m); | |
5592 | assert(strv); | |
5593 | ||
5594 | r = bus_message_get_arg_skip(m, i, &type, &contents); | |
5595 | if (r < 0) | |
5596 | return r; | |
5597 | ||
5598 | if (type != SD_BUS_TYPE_ARRAY) | |
5599 | return -ENXIO; | |
5600 | if (!STR_IN_SET(contents, "s", "o", "g")) | |
5601 | return -ENXIO; | |
5602 | ||
5603 | return sd_bus_message_read_strv(m, strv); | |
392d5b37 | 5604 | } |
2100fa10 | 5605 | |
d9f644e2 | 5606 | _public_ int sd_bus_message_get_errno(sd_bus_message *m) { |
b49ffb29 | 5607 | assert_return(m, EINVAL); |
eb01ba5d | 5608 | |
40ca29a1 | 5609 | if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) |
eb01ba5d LP |
5610 | return 0; |
5611 | ||
40ca29a1 | 5612 | return sd_bus_error_get_errno(&m->error); |
eb01ba5d | 5613 | } |
29ddb38f | 5614 | |
d9f644e2 | 5615 | _public_ const char* sd_bus_message_get_signature(sd_bus_message *m, int complete) { |
29ddb38f LP |
5616 | struct bus_container *c; |
5617 | ||
9d6c7c82 | 5618 | assert_return(m, NULL); |
29ddb38f | 5619 | |
9c65778d | 5620 | c = complete ? &m->root_container : message_get_last_container(m); |
d6385068 | 5621 | return strempty(c->signature); |
29ddb38f | 5622 | } |
c430fee6 | 5623 | |
8022212b LP |
5624 | _public_ int sd_bus_message_is_empty(sd_bus_message *m) { |
5625 | assert_return(m, -EINVAL); | |
5626 | ||
5627 | return isempty(m->root_container.signature); | |
5628 | } | |
5629 | ||
64e96a19 LP |
5630 | _public_ int sd_bus_message_has_signature(sd_bus_message *m, const char *signature) { |
5631 | assert_return(m, -EINVAL); | |
5632 | ||
5633 | return streq(strempty(m->root_container.signature), strempty(signature)); | |
5634 | } | |
5635 | ||
d9f644e2 | 5636 | _public_ int sd_bus_message_copy(sd_bus_message *m, sd_bus_message *source, int all) { |
c430fee6 LP |
5637 | bool done_something = false; |
5638 | int r; | |
5639 | ||
80ba3b84 LP |
5640 | assert_return(m, -EINVAL); |
5641 | assert_return(source, -EINVAL); | |
5642 | assert_return(!m->sealed, -EPERM); | |
5643 | assert_return(source->sealed, -EPERM); | |
5644 | ||
c430fee6 LP |
5645 | do { |
5646 | const char *contents; | |
5647 | char type; | |
5648 | union { | |
5649 | uint8_t u8; | |
5650 | uint16_t u16; | |
5651 | int16_t s16; | |
5652 | uint32_t u32; | |
5653 | int32_t s32; | |
5654 | uint64_t u64; | |
5655 | int64_t s64; | |
5656 | double d64; | |
5657 | const char *string; | |
5658 | int i; | |
5659 | } basic; | |
5660 | ||
5661 | r = sd_bus_message_peek_type(source, &type, &contents); | |
5662 | if (r < 0) | |
5663 | return r; | |
5664 | if (r == 0) | |
5665 | break; | |
5666 | ||
5667 | done_something = true; | |
5668 | ||
5669 | if (bus_type_is_container(type) > 0) { | |
5670 | ||
5671 | r = sd_bus_message_enter_container(source, type, contents); | |
5672 | if (r < 0) | |
5673 | return r; | |
5674 | ||
5675 | r = sd_bus_message_open_container(m, type, contents); | |
5676 | if (r < 0) | |
5677 | return r; | |
5678 | ||
5679 | r = sd_bus_message_copy(m, source, true); | |
5680 | if (r < 0) | |
5681 | return r; | |
5682 | ||
5683 | r = sd_bus_message_close_container(m); | |
5684 | if (r < 0) | |
5685 | return r; | |
5686 | ||
5687 | r = sd_bus_message_exit_container(source); | |
5688 | if (r < 0) | |
5689 | return r; | |
5690 | ||
5691 | continue; | |
5692 | } | |
5693 | ||
5694 | r = sd_bus_message_read_basic(source, type, &basic); | |
5695 | if (r < 0) | |
5696 | return r; | |
5697 | ||
5698 | assert(r > 0); | |
5699 | ||
945c2931 | 5700 | if (IN_SET(type, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE, SD_BUS_TYPE_STRING)) |
c430fee6 LP |
5701 | r = sd_bus_message_append_basic(m, type, basic.string); |
5702 | else | |
5703 | r = sd_bus_message_append_basic(m, type, &basic); | |
5704 | ||
5705 | if (r < 0) | |
5706 | return r; | |
5707 | ||
5708 | } while (all); | |
5709 | ||
5710 | return done_something; | |
5711 | } | |
5712 | ||
d9f644e2 | 5713 | _public_ int sd_bus_message_verify_type(sd_bus_message *m, char type, const char *contents) { |
c430fee6 LP |
5714 | const char *c; |
5715 | char t; | |
5716 | int r; | |
5717 | ||
5718 | assert_return(m, -EINVAL); | |
5719 | assert_return(m->sealed, -EPERM); | |
5720 | assert_return(!type || bus_type_is_valid(type), -EINVAL); | |
5721 | assert_return(!contents || signature_is_valid(contents, true), -EINVAL); | |
5722 | assert_return(type || contents, -EINVAL); | |
5723 | assert_return(!contents || !type || bus_type_is_container(type), -EINVAL); | |
5724 | ||
5725 | r = sd_bus_message_peek_type(m, &t, &c); | |
5726 | if (r <= 0) | |
5727 | return r; | |
5728 | ||
5729 | if (type != 0 && type != t) | |
5730 | return 0; | |
5731 | ||
5732 | if (contents && !streq_ptr(contents, c)) | |
5733 | return 0; | |
5734 | ||
5735 | return 1; | |
5736 | } | |
2be44176 LP |
5737 | |
5738 | _public_ sd_bus *sd_bus_message_get_bus(sd_bus_message *m) { | |
5739 | assert_return(m, NULL); | |
5740 | ||
5741 | return m->bus; | |
5742 | } | |
e1c433c6 LP |
5743 | |
5744 | int bus_message_remarshal(sd_bus *bus, sd_bus_message **m) { | |
4afd3348 | 5745 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *n = NULL; |
e1c433c6 LP |
5746 | usec_t timeout; |
5747 | int r; | |
5748 | ||
5749 | assert(bus); | |
5750 | assert(m); | |
5751 | assert(*m); | |
5752 | ||
5753 | switch ((*m)->header->type) { | |
5754 | ||
5755 | case SD_BUS_MESSAGE_SIGNAL: | |
151b9b96 | 5756 | r = sd_bus_message_new_signal(bus, &n, (*m)->path, (*m)->interface, (*m)->member); |
e1c433c6 LP |
5757 | if (r < 0) |
5758 | return r; | |
5759 | ||
5760 | break; | |
5761 | ||
5762 | case SD_BUS_MESSAGE_METHOD_CALL: | |
151b9b96 | 5763 | r = sd_bus_message_new_method_call(bus, &n, (*m)->destination, (*m)->path, (*m)->interface, (*m)->member); |
e1c433c6 LP |
5764 | if (r < 0) |
5765 | return r; | |
5766 | ||
5767 | break; | |
5768 | ||
5769 | case SD_BUS_MESSAGE_METHOD_RETURN: | |
5770 | case SD_BUS_MESSAGE_METHOD_ERROR: | |
5771 | ||
75bcbcf2 SA |
5772 | r = sd_bus_message_new(bus, &n, (*m)->header->type); |
5773 | if (r < 0) | |
e1c433c6 LP |
5774 | return -ENOMEM; |
5775 | ||
75bcbcf2 SA |
5776 | assert(n); |
5777 | ||
693eb9a2 | 5778 | n->reply_cookie = (*m)->reply_cookie; |
b267a6d2 LP |
5779 | |
5780 | r = message_append_reply_cookie(n, n->reply_cookie); | |
e1c433c6 LP |
5781 | if (r < 0) |
5782 | return r; | |
5783 | ||
5784 | if ((*m)->header->type == SD_BUS_MESSAGE_METHOD_ERROR && (*m)->error.name) { | |
5785 | r = message_append_field_string(n, BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, (*m)->error.name, &n->error.message); | |
5786 | if (r < 0) | |
5787 | return r; | |
5788 | ||
5789 | n->error._need_free = -1; | |
5790 | } | |
5791 | ||
5792 | break; | |
5793 | ||
5794 | default: | |
5795 | return -EINVAL; | |
5796 | } | |
5797 | ||
5798 | if ((*m)->destination && !n->destination) { | |
5799 | r = message_append_field_string(n, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, (*m)->destination, &n->destination); | |
5800 | if (r < 0) | |
5801 | return r; | |
5802 | } | |
5803 | ||
5804 | if ((*m)->sender && !n->sender) { | |
5805 | r = message_append_field_string(n, BUS_MESSAGE_HEADER_SENDER, SD_BUS_TYPE_STRING, (*m)->sender, &n->sender); | |
5806 | if (r < 0) | |
5807 | return r; | |
5808 | } | |
5809 | ||
5810 | n->header->flags |= (*m)->header->flags & (BUS_MESSAGE_NO_REPLY_EXPECTED|BUS_MESSAGE_NO_AUTO_START); | |
5811 | ||
5812 | r = sd_bus_message_copy(n, *m, true); | |
5813 | if (r < 0) | |
5814 | return r; | |
5815 | ||
5816 | timeout = (*m)->timeout; | |
385b2eb2 YW |
5817 | if (timeout == 0 && !((*m)->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)) { |
5818 | r = sd_bus_get_method_call_timeout(bus, &timeout); | |
5819 | if (r < 0) | |
5820 | return r; | |
5821 | } | |
e1c433c6 | 5822 | |
75bcbcf2 | 5823 | r = sd_bus_message_seal(n, BUS_MESSAGE_COOKIE(*m), timeout); |
e1c433c6 LP |
5824 | if (r < 0) |
5825 | return r; | |
5826 | ||
5827 | sd_bus_message_unref(*m); | |
1cc6c93a | 5828 | *m = TAKE_PTR(n); |
e1c433c6 LP |
5829 | |
5830 | return 0; | |
5831 | } | |
a7639e37 | 5832 | |
ca7b42c8 LP |
5833 | _public_ int sd_bus_message_get_priority(sd_bus_message *m, int64_t *priority) { |
5834 | assert_return(m, -EINVAL); | |
5835 | assert_return(priority, -EINVAL); | |
5836 | ||
5837 | *priority = m->priority; | |
5838 | return 0; | |
5839 | } | |
5840 | ||
5841 | _public_ int sd_bus_message_set_priority(sd_bus_message *m, int64_t priority) { | |
5842 | assert_return(m, -EINVAL); | |
5843 | assert_return(!m->sealed, -EPERM); | |
5844 | ||
5845 | m->priority = priority; | |
5846 | return 0; | |
5847 | } |