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uci: fix memory leak in rpc_uci_apply_timeout()
[project/rpcd.git] / uci.c
1 /*
2 * rpcd - UBUS RPC server
3 *
4 * Copyright (C) 2013-2014 Jo-Philipp Wich <jow@openwrt.org>
5 *
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <libgen.h>
20 #include <glob.h>
21
22 #include <libubox/blobmsg.h>
23 #include <libubox/blobmsg_json.h>
24
25 #include <rpcd/uci.h>
26 #include <rpcd/exec.h>
27 #include <rpcd/session.h>
28
29 static struct blob_buf buf;
30 static struct uci_context *cursor;
31 static struct uloop_timeout apply_timer;
32 static struct ubus_context *apply_ctx;
33
34 char apply_sid[RPC_SID_LEN + 1];
35
36 enum {
37 RPC_G_CONFIG,
38 RPC_G_SECTION,
39 RPC_G_OPTION,
40 RPC_G_TYPE,
41 RPC_G_MATCH,
42 RPC_G_SESSION,
43 __RPC_G_MAX,
44 };
45
46 static const struct blobmsg_policy rpc_uci_get_policy[__RPC_G_MAX] = {
47 [RPC_G_CONFIG] = { .name = "config", .type = BLOBMSG_TYPE_STRING },
48 [RPC_G_SECTION] = { .name = "section", .type = BLOBMSG_TYPE_STRING },
49 [RPC_G_OPTION] = { .name = "option", .type = BLOBMSG_TYPE_STRING },
50 [RPC_G_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
51 [RPC_G_MATCH] = { .name = "match", .type = BLOBMSG_TYPE_TABLE },
52 [RPC_G_SESSION] = { .name = "ubus_rpc_session",
53 .type = BLOBMSG_TYPE_STRING },
54 };
55
56 enum {
57 RPC_A_CONFIG,
58 RPC_A_TYPE,
59 RPC_A_NAME,
60 RPC_A_VALUES,
61 RPC_A_SESSION,
62 __RPC_A_MAX,
63 };
64
65 static const struct blobmsg_policy rpc_uci_add_policy[__RPC_A_MAX] = {
66 [RPC_A_CONFIG] = { .name = "config", .type = BLOBMSG_TYPE_STRING },
67 [RPC_A_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
68 [RPC_A_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
69 [RPC_A_VALUES] = { .name = "values", .type = BLOBMSG_TYPE_TABLE },
70 [RPC_A_SESSION] = { .name = "ubus_rpc_session",
71 .type = BLOBMSG_TYPE_STRING },
72 };
73
74 enum {
75 RPC_S_CONFIG,
76 RPC_S_SECTION,
77 RPC_S_TYPE,
78 RPC_S_MATCH,
79 RPC_S_VALUES,
80 RPC_S_SESSION,
81 __RPC_S_MAX,
82 };
83
84 static const struct blobmsg_policy rpc_uci_set_policy[__RPC_S_MAX] = {
85 [RPC_S_CONFIG] = { .name = "config", .type = BLOBMSG_TYPE_STRING },
86 [RPC_S_SECTION] = { .name = "section", .type = BLOBMSG_TYPE_STRING },
87 [RPC_S_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
88 [RPC_S_MATCH] = { .name = "match", .type = BLOBMSG_TYPE_TABLE },
89 [RPC_S_VALUES] = { .name = "values", .type = BLOBMSG_TYPE_TABLE },
90 [RPC_S_SESSION] = { .name = "ubus_rpc_session",
91 .type = BLOBMSG_TYPE_STRING },
92 };
93
94 enum {
95 RPC_D_CONFIG,
96 RPC_D_SECTION,
97 RPC_D_TYPE,
98 RPC_D_MATCH,
99 RPC_D_OPTION,
100 RPC_D_OPTIONS,
101 RPC_D_SESSION,
102 __RPC_D_MAX,
103 };
104
105 static const struct blobmsg_policy rpc_uci_delete_policy[__RPC_D_MAX] = {
106 [RPC_D_CONFIG] = { .name = "config", .type = BLOBMSG_TYPE_STRING },
107 [RPC_D_SECTION] = { .name = "section", .type = BLOBMSG_TYPE_STRING },
108 [RPC_D_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
109 [RPC_D_MATCH] = { .name = "match", .type = BLOBMSG_TYPE_TABLE },
110 [RPC_D_OPTION] = { .name = "option", .type = BLOBMSG_TYPE_STRING },
111 [RPC_D_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_ARRAY },
112 [RPC_D_SESSION] = { .name = "ubus_rpc_session",
113 .type = BLOBMSG_TYPE_STRING },
114 };
115
116 enum {
117 RPC_R_CONFIG,
118 RPC_R_SECTION,
119 RPC_R_OPTION,
120 RPC_R_NAME,
121 RPC_R_SESSION,
122 __RPC_R_MAX,
123 };
124
125 static const struct blobmsg_policy rpc_uci_rename_policy[__RPC_R_MAX] = {
126 [RPC_R_CONFIG] = { .name = "config", .type = BLOBMSG_TYPE_STRING },
127 [RPC_R_SECTION] = { .name = "section", .type = BLOBMSG_TYPE_STRING },
128 [RPC_R_OPTION] = { .name = "option", .type = BLOBMSG_TYPE_STRING },
129 [RPC_R_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
130 [RPC_R_SESSION] = { .name = "ubus_rpc_session",
131 .type = BLOBMSG_TYPE_STRING },
132 };
133
134 enum {
135 RPC_O_CONFIG,
136 RPC_O_SECTIONS,
137 RPC_O_SESSION,
138 __RPC_O_MAX,
139 };
140
141 static const struct blobmsg_policy rpc_uci_order_policy[__RPC_O_MAX] = {
142 [RPC_O_CONFIG] = { .name = "config", .type = BLOBMSG_TYPE_STRING },
143 [RPC_O_SECTIONS] = { .name = "sections", .type = BLOBMSG_TYPE_ARRAY },
144 [RPC_O_SESSION] = { .name = "ubus_rpc_session",
145 .type = BLOBMSG_TYPE_STRING },
146 };
147
148 enum {
149 RPC_C_CONFIG,
150 RPC_C_SESSION,
151 __RPC_C_MAX,
152 };
153
154 static const struct blobmsg_policy rpc_uci_config_policy[__RPC_C_MAX] = {
155 [RPC_C_CONFIG] = { .name = "config", .type = BLOBMSG_TYPE_STRING },
156 [RPC_C_SESSION] = { .name = "ubus_rpc_session",
157 .type = BLOBMSG_TYPE_STRING },
158 };
159
160 enum {
161 RPC_T_ROLLBACK,
162 RPC_T_TIMEOUT,
163 RPC_T_SESSION,
164 __RPC_T_MAX,
165 };
166
167 static const struct blobmsg_policy rpc_uci_apply_policy[__RPC_T_MAX] = {
168 [RPC_T_ROLLBACK] = { .name = "rollback", .type = BLOBMSG_TYPE_BOOL },
169 [RPC_T_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
170 [RPC_T_SESSION] = { .name = "ubus_rpc_session",
171 .type = BLOBMSG_TYPE_STRING },
172 };
173
174 enum {
175 RPC_B_SESSION,
176 __RPC_B_MAX,
177 };
178
179 static const struct blobmsg_policy rpc_uci_rollback_policy[__RPC_B_MAX] = {
180 [RPC_B_SESSION] = { .name = "ubus_rpc_session",
181 .type = BLOBMSG_TYPE_STRING },
182 };
183
184 /*
185 * Turn uci error state into ubus return code
186 */
187 static int
188 rpc_uci_status(void)
189 {
190 switch (cursor->err)
191 {
192 case UCI_OK:
193 return UBUS_STATUS_OK;
194
195 case UCI_ERR_INVAL:
196 return UBUS_STATUS_INVALID_ARGUMENT;
197
198 case UCI_ERR_NOTFOUND:
199 return UBUS_STATUS_NOT_FOUND;
200
201 default:
202 return UBUS_STATUS_UNKNOWN_ERROR;
203 }
204 }
205
206 /*
207 * Clear all save directories from the uci cursor and append the given path
208 * as new save directory.
209 */
210 static void
211 rpc_uci_replace_savedir(const char *path)
212 {
213 struct uci_element *e, *tmp;
214
215 uci_foreach_element_safe(&cursor->delta_path, tmp, e)
216 free(e);
217
218 cursor->delta_path.prev = &cursor->delta_path;
219 cursor->delta_path.next = &cursor->delta_path;
220
221 if (path)
222 uci_set_savedir(cursor, path);
223 }
224
225 /*
226 * Setup per-session delta save directory. If the passed "sid" blob attribute
227 * pointer is NULL then the precedure was not invoked through the ubus-rpc so
228 * we do not perform session isolation and use the default save directory.
229 */
230 static void
231 rpc_uci_set_savedir(struct blob_attr *sid)
232 {
233 char path[PATH_MAX];
234
235 if (!sid)
236 {
237 rpc_uci_replace_savedir("/tmp/.uci");
238 return;
239 }
240
241 snprintf(path, sizeof(path) - 1,
242 RPC_UCI_SAVEDIR_PREFIX "%s", blobmsg_get_string(sid));
243
244 rpc_uci_replace_savedir(path);
245 }
246
247 /*
248 * Test read access to given config. If the passed "sid" blob attribute pointer
249 * is NULL then the precedure was not invoked through the ubus-rpc so we do not
250 * perform access control and always assume true.
251 */
252 static bool
253 rpc_uci_read_access(struct blob_attr *sid, struct blob_attr *config)
254 {
255 rpc_uci_set_savedir(sid);
256
257 if (!sid)
258 return true;
259
260 return rpc_session_access(blobmsg_data(sid), "uci",
261 blobmsg_data(config), "read");
262 }
263
264 /*
265 * Test write access to given config. If the passed "sid" blob attribute pointer
266 * is NULL then the precedure was not invoked through the ubus-rpc so we do not
267 * perform access control and always assume true.
268 */
269 static bool
270 rpc_uci_write_access(struct blob_attr *sid, struct blob_attr *config)
271 {
272 rpc_uci_set_savedir(sid);
273
274 if (!sid)
275 return true;
276
277 return rpc_session_access(blobmsg_data(sid), "uci",
278 blobmsg_data(config), "write");
279 }
280
281 /*
282 * Format applicable blob value as string and place a pointer to the string
283 * buffer in "p". Uses a static string buffer.
284 */
285 static bool
286 rpc_uci_format_blob(struct blob_attr *v, const char **p)
287 {
288 static char buf[21];
289
290 *p = NULL;
291
292 switch (blobmsg_type(v))
293 {
294 case BLOBMSG_TYPE_STRING:
295 *p = blobmsg_data(v);
296 break;
297
298 case BLOBMSG_TYPE_INT64:
299 snprintf(buf, sizeof(buf), "%"PRIu64, blobmsg_get_u64(v));
300 *p = buf;
301 break;
302
303 case BLOBMSG_TYPE_INT32:
304 snprintf(buf, sizeof(buf), "%u", blobmsg_get_u32(v));
305 *p = buf;
306 break;
307
308 case BLOBMSG_TYPE_INT16:
309 snprintf(buf, sizeof(buf), "%u", blobmsg_get_u16(v));
310 *p = buf;
311 break;
312
313 case BLOBMSG_TYPE_INT8:
314 snprintf(buf, sizeof(buf), "%u", !!blobmsg_get_u8(v));
315 *p = buf;
316 break;
317
318 default:
319 break;
320 }
321
322 return !!*p;
323 }
324
325 /*
326 * Lookup the given uci_ptr and enable extended lookup format if the .section
327 * value of the uci_ptr looks like extended syntax. Uses an internal copy
328 * of the given uci_ptr to perform the lookup as failing extended section
329 * lookup operations in libuci will zero our the uci_ptr struct.
330 * Copies the internal uci_ptr back to given the uci_ptr on success.
331 */
332 static int
333 rpc_uci_lookup(struct uci_ptr *ptr)
334 {
335 int rv;
336 struct uci_ptr lookup = *ptr;
337
338 if (!lookup.s && lookup.section && *lookup.section == '@')
339 lookup.flags |= UCI_LOOKUP_EXTENDED;
340
341 rv = uci_lookup_ptr(cursor, &lookup, NULL, true);
342
343 if (!rv)
344 *ptr = lookup;
345
346 return rv;
347 }
348
349 /*
350 * Checks whether the given uci_option object matches the given string value.
351 * 1) If the uci_option is of type list, check whether any of the list elements
352 * equals to the given string
353 * 2) If the uci_option is of type string, parse it into space separated tokens
354 * and check if any of the tokens equals to the given string.
355 * Returns true if a list element or token matched the given string.
356 */
357 static bool
358 rpc_uci_match_option(struct uci_option *o, const char *cmp)
359 {
360 struct uci_element *e;
361 char *s, *p;
362
363 if (o->type == UCI_TYPE_LIST)
364 {
365 uci_foreach_element(&o->v.list, e)
366 if (e->name && !strcmp(e->name, cmp))
367 return true;
368
369 return false;
370 }
371
372 if (!o->v.string)
373 return false;
374
375 s = strdup(o->v.string);
376
377 if (!s)
378 return false;
379
380 for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
381 {
382 if (!strcmp(p, cmp))
383 {
384 free(s);
385 return true;
386 }
387 }
388
389 free(s);
390 return false;
391 }
392
393 /*
394 * Checks whether the given uci_section matches the type and value blob attrs.
395 * 1) Returns false if "type" is given and the section type does not match
396 * the value specified in the "type" string blob attribute, else continue.
397 * 2) Tests whether any key in the "matches" table blob attribute exists in
398 * the given uci_section and whether each value is contained in the
399 * corresponding uci option value (see rpc_uci_match_option()).
400 * 3) A missing or empty "matches" table blob attribute is always considered
401 * to be a match.
402 * Returns true if "type" matches or is NULL and "matches" matches or is NULL.
403 */
404 static bool
405 rpc_uci_match_section(struct uci_section *s,
406 struct blob_attr *type, struct blob_attr *matches)
407 {
408 struct uci_element *e;
409 struct blob_attr *cur;
410 const char *cmp;
411 bool match = false;
412 bool empty = true;
413 int rem;
414
415 if (type && strcmp(s->type, blobmsg_data(type)))
416 return false;
417
418 if (!matches)
419 return true;
420
421 blobmsg_for_each_attr(cur, matches, rem)
422 {
423 if (!rpc_uci_format_blob(cur, &cmp))
424 continue;
425
426 uci_foreach_element(&s->options, e)
427 {
428 if (strcmp(e->name, blobmsg_name(cur)))
429 continue;
430
431 if (!rpc_uci_match_option(uci_to_option(e), cmp))
432 return false;
433
434 match = true;
435 }
436
437 empty = false;
438 }
439
440 return (empty || match);
441 }
442
443 /*
444 * Dump the given uci_option value into the global blobmsg buffer and use
445 * given "name" as key.
446 * 1) If the uci_option is of type list, put a table into the blob buffer and
447 * add each list item as string to it.
448 * 2) If the uci_option is of type string, put its value directly into the blob
449 * buffer.
450 */
451 static void
452 rpc_uci_dump_option(struct uci_option *o, const char *name)
453 {
454 void *c;
455 struct uci_element *e;
456
457 switch (o->type)
458 {
459 case UCI_TYPE_STRING:
460 blobmsg_add_string(&buf, name, o->v.string);
461 break;
462
463 case UCI_TYPE_LIST:
464 c = blobmsg_open_array(&buf, name);
465
466 uci_foreach_element(&o->v.list, e)
467 blobmsg_add_string(&buf, NULL, e->name);
468
469 blobmsg_close_array(&buf, c);
470 break;
471
472 default:
473 break;
474 }
475 }
476
477 /*
478 * Dump the given uci_section object into the global blobmsg buffer and use
479 * given "name" as key.
480 * Puts a table into the blob buffer and puts each section option member value
481 * as value into the table using the option name as key.
482 * Adds three special keys ".anonymous", ".type" and ".name" which specify the
483 * corresponding section properties.
484 */
485 static void
486 rpc_uci_dump_section(struct uci_section *s, const char *name, int index)
487 {
488 void *c;
489 struct uci_option *o;
490 struct uci_element *e;
491
492 c = blobmsg_open_table(&buf, name);
493
494 blobmsg_add_u8(&buf, ".anonymous", s->anonymous);
495 blobmsg_add_string(&buf, ".type", s->type);
496 blobmsg_add_string(&buf, ".name", s->e.name);
497
498 if (index >= 0)
499 blobmsg_add_u32(&buf, ".index", index);
500
501 uci_foreach_element(&s->options, e)
502 {
503 o = uci_to_option(e);
504 rpc_uci_dump_option(o, o->e.name);
505 }
506
507 blobmsg_close_table(&buf, c);
508 }
509
510 /*
511 * Dump the given uci_package object into the global blobmsg buffer and use
512 * given "name" as key.
513 * Puts a table into the blob buffer and puts each package section member as
514 * value into the table using the section name as key.
515 * Only dumps sections matching the given "type" and "matches", see explaination
516 * of rpc_uci_match_section() for details.
517 */
518 static void
519 rpc_uci_dump_package(struct uci_package *p, const char *name,
520 struct blob_attr *type, struct blob_attr *matches)
521 {
522 void *c;
523 struct uci_element *e;
524 int i = -1;
525
526 c = blobmsg_open_table(&buf, name);
527
528 uci_foreach_element(&p->sections, e)
529 {
530 i++;
531
532 if (!rpc_uci_match_section(uci_to_section(e), type, matches))
533 continue;
534
535 rpc_uci_dump_section(uci_to_section(e), e->name, i);
536 }
537
538 blobmsg_close_table(&buf, c);
539 }
540
541
542 static int
543 rpc_uci_getcommon(struct ubus_context *ctx, struct ubus_request_data *req,
544 struct blob_attr *msg, bool use_state)
545 {
546 struct blob_attr *tb[__RPC_G_MAX];
547 struct uci_package *p = NULL;
548 struct uci_ptr ptr = { 0 };
549
550 blobmsg_parse(rpc_uci_get_policy, __RPC_G_MAX, tb,
551 blob_data(msg), blob_len(msg));
552
553 if (!tb[RPC_G_CONFIG])
554 return UBUS_STATUS_INVALID_ARGUMENT;
555
556 if (!rpc_uci_read_access(tb[RPC_G_SESSION], tb[RPC_G_CONFIG]))
557 return UBUS_STATUS_PERMISSION_DENIED;
558
559 ptr.package = blobmsg_data(tb[RPC_G_CONFIG]);
560
561 if (use_state)
562 uci_set_savedir(cursor, "/var/state");
563
564 if (uci_load(cursor, ptr.package, &p))
565 return rpc_uci_status();
566
567 if (tb[RPC_G_SECTION])
568 {
569 ptr.section = blobmsg_data(tb[RPC_G_SECTION]);
570
571 if (tb[RPC_G_OPTION])
572 ptr.option = blobmsg_data(tb[RPC_G_OPTION]);
573 }
574
575 if (rpc_uci_lookup(&ptr) || !(ptr.flags & UCI_LOOKUP_COMPLETE))
576 goto out;
577
578 blob_buf_init(&buf, 0);
579
580 switch (ptr.last->type)
581 {
582 case UCI_TYPE_PACKAGE:
583 rpc_uci_dump_package(ptr.p, "values", tb[RPC_G_TYPE], tb[RPC_G_MATCH]);
584 break;
585
586 case UCI_TYPE_SECTION:
587 rpc_uci_dump_section(ptr.s, "values", -1);
588 break;
589
590 case UCI_TYPE_OPTION:
591 rpc_uci_dump_option(ptr.o, "value");
592 break;
593
594 default:
595 break;
596 }
597
598 ubus_send_reply(ctx, req, buf.head);
599
600 out:
601 uci_unload(cursor, p);
602
603 return rpc_uci_status();
604 }
605
606 static int
607 rpc_uci_get(struct ubus_context *ctx, struct ubus_object *obj,
608 struct ubus_request_data *req, const char *method,
609 struct blob_attr *msg)
610 {
611 return rpc_uci_getcommon(ctx, req, msg, false);
612 }
613
614 static int
615 rpc_uci_state(struct ubus_context *ctx, struct ubus_object *obj,
616 struct ubus_request_data *req, const char *method,
617 struct blob_attr *msg)
618 {
619 return rpc_uci_getcommon(ctx, req, msg, true);
620 }
621
622 static int
623 rpc_uci_add(struct ubus_context *ctx, struct ubus_object *obj,
624 struct ubus_request_data *req, const char *method,
625 struct blob_attr *msg)
626 {
627 struct blob_attr *tb[__RPC_A_MAX];
628 struct blob_attr *cur, *elem;
629 struct uci_package *p = NULL;
630 struct uci_section *s;
631 struct uci_ptr ptr = { 0 };
632 int rem, rem2;
633
634 blobmsg_parse(rpc_uci_add_policy, __RPC_A_MAX, tb,
635 blob_data(msg), blob_len(msg));
636
637 if (!tb[RPC_A_CONFIG] || !tb[RPC_A_TYPE])
638 return UBUS_STATUS_INVALID_ARGUMENT;
639
640 if (!rpc_uci_write_access(tb[RPC_A_SESSION], tb[RPC_A_CONFIG]))
641 return UBUS_STATUS_PERMISSION_DENIED;
642
643 ptr.package = blobmsg_data(tb[RPC_A_CONFIG]);
644
645 if (uci_load(cursor, ptr.package, &p))
646 return rpc_uci_status();
647
648 /* add named section */
649 if (tb[RPC_A_NAME])
650 {
651 ptr.section = blobmsg_data(tb[RPC_A_NAME]);
652 ptr.value = blobmsg_data(tb[RPC_A_TYPE]);
653 ptr.option = NULL;
654
655 if (rpc_uci_lookup(&ptr) || uci_set(cursor, &ptr))
656 goto out;
657 }
658
659 /* add anon section */
660 else
661 {
662 if (uci_add_section(cursor, p, blobmsg_data(tb[RPC_A_TYPE]), &s) || !s)
663 goto out;
664
665 ptr.section = s->e.name;
666 }
667
668 if (tb[RPC_A_VALUES])
669 {
670 blobmsg_for_each_attr(cur, tb[RPC_A_VALUES], rem)
671 {
672 ptr.o = NULL;
673 ptr.option = blobmsg_name(cur);
674
675 if (rpc_uci_lookup(&ptr) || !ptr.s)
676 continue;
677
678 switch (blobmsg_type(cur))
679 {
680 case BLOBMSG_TYPE_ARRAY:
681 blobmsg_for_each_attr(elem, cur, rem2)
682 if (rpc_uci_format_blob(elem, &ptr.value))
683 uci_add_list(cursor, &ptr);
684 break;
685
686 default:
687 if (rpc_uci_format_blob(cur, &ptr.value))
688 uci_set(cursor, &ptr);
689 break;
690 }
691 }
692 }
693
694 uci_save(cursor, p);
695
696 blob_buf_init(&buf, 0);
697 blobmsg_add_string(&buf, "section", ptr.section);
698 ubus_send_reply(ctx, req, buf.head);
699
700 out:
701 uci_unload(cursor, p);
702
703 return rpc_uci_status();
704 }
705
706 /*
707 * Turn value from a blob attribute into uci set operation
708 * 1) if the blob is of type array, delete existing option (if any) and
709 * emit uci add_list operations for each element
710 * 2) if the blob is not an array but an option of type list exists,
711 * delete existing list and emit uci set operation for the blob value
712 * 3) in all other cases only emit a set operation if there is no existing
713 * option of if the existing options value differs from the blob value
714 */
715 static void
716 rpc_uci_merge_set(struct blob_attr *opt, struct uci_ptr *ptr)
717 {
718 struct blob_attr *cur;
719 int rem;
720
721 ptr->o = NULL;
722 ptr->option = blobmsg_name(opt);
723 ptr->value = NULL;
724
725 if (rpc_uci_lookup(ptr) || !ptr->s)
726 return;
727
728 if (blobmsg_type(opt) == BLOBMSG_TYPE_ARRAY)
729 {
730 if (ptr->o)
731 uci_delete(cursor, ptr);
732
733 blobmsg_for_each_attr(cur, opt, rem)
734 if (rpc_uci_format_blob(cur, &ptr->value))
735 uci_add_list(cursor, ptr);
736 }
737 else if (ptr->o && ptr->o->type == UCI_TYPE_LIST)
738 {
739 uci_delete(cursor, ptr);
740
741 if (rpc_uci_format_blob(opt, &ptr->value))
742 uci_set(cursor, ptr);
743 }
744 else if (rpc_uci_format_blob(opt, &ptr->value))
745 {
746 if (!ptr->o || !ptr->o->v.string || strcmp(ptr->o->v.string, ptr->value))
747 uci_set(cursor, ptr);
748 }
749 }
750
751 static int
752 rpc_uci_set(struct ubus_context *ctx, struct ubus_object *obj,
753 struct ubus_request_data *req, const char *method,
754 struct blob_attr *msg)
755 {
756 struct blob_attr *tb[__RPC_S_MAX];
757 struct blob_attr *cur;
758 struct uci_package *p = NULL;
759 struct uci_element *e;
760 struct uci_ptr ptr = { 0 };
761 int rem;
762
763 blobmsg_parse(rpc_uci_set_policy, __RPC_S_MAX, tb,
764 blob_data(msg), blob_len(msg));
765
766 if (!tb[RPC_S_CONFIG] || !tb[RPC_S_VALUES] ||
767 (!tb[RPC_S_SECTION] && !tb[RPC_S_TYPE] && !tb[RPC_S_MATCH]))
768 return UBUS_STATUS_INVALID_ARGUMENT;
769
770 if (!rpc_uci_write_access(tb[RPC_S_SESSION], tb[RPC_S_CONFIG]))
771 return UBUS_STATUS_PERMISSION_DENIED;
772
773 ptr.package = blobmsg_data(tb[RPC_S_CONFIG]);
774
775 if (uci_load(cursor, ptr.package, &p))
776 return rpc_uci_status();
777
778 if (tb[RPC_S_SECTION])
779 {
780 ptr.section = blobmsg_data(tb[RPC_S_SECTION]);
781 blobmsg_for_each_attr(cur, tb[RPC_S_VALUES], rem)
782 rpc_uci_merge_set(cur, &ptr);
783 }
784 else
785 {
786 uci_foreach_element(&p->sections, e)
787 {
788 if (!rpc_uci_match_section(uci_to_section(e),
789 tb[RPC_S_TYPE], tb[RPC_S_MATCH]))
790 continue;
791
792 ptr.s = NULL;
793 ptr.section = e->name;
794
795 blobmsg_for_each_attr(cur, tb[RPC_S_VALUES], rem)
796 rpc_uci_merge_set(cur, &ptr);
797 }
798 }
799
800 uci_save(cursor, p);
801 uci_unload(cursor, p);
802
803 return rpc_uci_status();
804 }
805
806 /*
807 * Delete option or section from uci specified by given blob attribute pointer
808 * 1) if the blob is of type array, delete any option named after each element
809 * 2) if the blob is of type string, delete the option named after its value
810 * 3) if the blob is NULL, delete entire section
811 */
812 static void
813 rpc_uci_merge_delete(struct blob_attr *opt, struct uci_ptr *ptr)
814 {
815 struct blob_attr *cur;
816 int rem;
817
818 if (rpc_uci_lookup(ptr) || !ptr->s)
819 return;
820
821 if (!opt)
822 {
823 ptr->o = NULL;
824 ptr->option = NULL;
825
826 uci_delete(cursor, ptr);
827 }
828 else if (blobmsg_type(opt) == BLOBMSG_TYPE_ARRAY)
829 {
830 blobmsg_for_each_attr(cur, opt, rem)
831 {
832 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
833 continue;
834
835 ptr->o = NULL;
836 ptr->option = blobmsg_data(cur);
837
838 if (rpc_uci_lookup(ptr) || !ptr->o)
839 continue;
840
841 uci_delete(cursor, ptr);
842 }
843 }
844 else if (blobmsg_type(opt) == BLOBMSG_TYPE_STRING)
845 {
846 ptr->o = NULL;
847 ptr->option = blobmsg_data(opt);
848
849 if (rpc_uci_lookup(ptr) || !ptr->o)
850 return;
851
852 uci_delete(cursor, ptr);
853 }
854 }
855
856 static int
857 rpc_uci_delete(struct ubus_context *ctx, struct ubus_object *obj,
858 struct ubus_request_data *req, const char *method,
859 struct blob_attr *msg)
860 {
861 struct blob_attr *tb[__RPC_D_MAX];
862 struct uci_package *p = NULL;
863 struct uci_element *e, *tmp;
864 struct uci_ptr ptr = { 0 };
865
866 blobmsg_parse(rpc_uci_delete_policy, __RPC_D_MAX, tb,
867 blob_data(msg), blob_len(msg));
868
869 if (!tb[RPC_D_CONFIG] ||
870 (!tb[RPC_D_SECTION] && !tb[RPC_D_TYPE] && !tb[RPC_D_MATCH]))
871 return UBUS_STATUS_INVALID_ARGUMENT;
872
873 if (!rpc_uci_write_access(tb[RPC_D_SESSION], tb[RPC_D_CONFIG]))
874 return UBUS_STATUS_PERMISSION_DENIED;
875
876 ptr.package = blobmsg_data(tb[RPC_D_CONFIG]);
877
878 if (uci_load(cursor, ptr.package, &p))
879 return rpc_uci_status();
880
881 if (tb[RPC_D_SECTION])
882 {
883 ptr.section = blobmsg_data(tb[RPC_D_SECTION]);
884
885 if (tb[RPC_D_OPTIONS])
886 rpc_uci_merge_delete(tb[RPC_D_OPTIONS], &ptr);
887 else
888 rpc_uci_merge_delete(tb[RPC_D_OPTION], &ptr);
889 }
890 else
891 {
892 uci_foreach_element_safe(&p->sections, tmp, e)
893 {
894 if (!rpc_uci_match_section(uci_to_section(e),
895 tb[RPC_D_TYPE], tb[RPC_D_MATCH]))
896 continue;
897
898 ptr.s = NULL;
899 ptr.section = e->name;
900
901 if (tb[RPC_D_OPTIONS])
902 rpc_uci_merge_delete(tb[RPC_D_OPTIONS], &ptr);
903 else
904 rpc_uci_merge_delete(tb[RPC_D_OPTION], &ptr);
905 }
906 }
907
908 uci_save(cursor, p);
909 uci_unload(cursor, p);
910
911 return rpc_uci_status();
912 }
913
914 static int
915 rpc_uci_rename(struct ubus_context *ctx, struct ubus_object *obj,
916 struct ubus_request_data *req, const char *method,
917 struct blob_attr *msg)
918 {
919 struct blob_attr *tb[__RPC_R_MAX];
920 struct uci_package *p = NULL;
921 struct uci_ptr ptr = { 0 };
922
923 blobmsg_parse(rpc_uci_rename_policy, __RPC_R_MAX, tb,
924 blob_data(msg), blob_len(msg));
925
926 if (!tb[RPC_R_CONFIG] || !tb[RPC_R_SECTION] || !tb[RPC_R_NAME])
927 return UBUS_STATUS_INVALID_ARGUMENT;
928
929 if (!rpc_uci_write_access(tb[RPC_R_SESSION], tb[RPC_R_CONFIG]))
930 return UBUS_STATUS_PERMISSION_DENIED;
931
932 ptr.package = blobmsg_data(tb[RPC_R_CONFIG]);
933 ptr.section = blobmsg_data(tb[RPC_R_SECTION]);
934 ptr.value = blobmsg_data(tb[RPC_R_NAME]);
935
936 if (tb[RPC_R_OPTION])
937 ptr.option = blobmsg_data(tb[RPC_R_OPTION]);
938
939 if (uci_load(cursor, ptr.package, &p))
940 return rpc_uci_status();
941
942 if (uci_lookup_ptr(cursor, &ptr, NULL, true))
943 goto out;
944
945 if ((ptr.option && !ptr.o) || !ptr.s)
946 {
947 cursor->err = UCI_ERR_NOTFOUND;
948 goto out;
949 }
950
951 if (uci_rename(cursor, &ptr))
952 goto out;
953
954 uci_save(cursor, p);
955
956 out:
957 uci_unload(cursor, p);
958
959 return rpc_uci_status();
960 }
961
962 static int
963 rpc_uci_order(struct ubus_context *ctx, struct ubus_object *obj,
964 struct ubus_request_data *req, const char *method,
965 struct blob_attr *msg)
966 {
967 struct blob_attr *tb[__RPC_O_MAX];
968 struct blob_attr *cur;
969 struct uci_package *p = NULL;
970 struct uci_ptr ptr = { 0 };
971 int rem, i = 1;
972
973 blobmsg_parse(rpc_uci_order_policy, __RPC_O_MAX, tb,
974 blob_data(msg), blob_len(msg));
975
976 if (!tb[RPC_O_CONFIG] || !tb[RPC_O_SECTIONS])
977 return UBUS_STATUS_INVALID_ARGUMENT;
978
979 if (!rpc_uci_write_access(tb[RPC_O_SESSION], tb[RPC_O_CONFIG]))
980 return UBUS_STATUS_PERMISSION_DENIED;
981
982 ptr.package = blobmsg_data(tb[RPC_O_CONFIG]);
983
984 if (uci_load(cursor, ptr.package, &p))
985 return rpc_uci_status();
986
987 blobmsg_for_each_attr(cur, tb[RPC_O_SECTIONS], rem)
988 {
989 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
990 continue;
991
992 ptr.s = NULL;
993 ptr.section = blobmsg_data(cur);
994
995 if (uci_lookup_ptr(cursor, &ptr, NULL, true) || !ptr.s)
996 continue;
997
998 uci_reorder_section(cursor, ptr.s, i++);
999 }
1000
1001 uci_save(cursor, p);
1002 uci_unload(cursor, p);
1003
1004 return rpc_uci_status();
1005 }
1006
1007 static void
1008 rpc_uci_dump_change(struct uci_delta *d)
1009 {
1010 void *c;
1011 const char *types[] = {
1012 [UCI_CMD_REORDER] = "order",
1013 [UCI_CMD_REMOVE] = "remove",
1014 [UCI_CMD_RENAME] = "rename",
1015 [UCI_CMD_ADD] = "add",
1016 [UCI_CMD_LIST_ADD] = "list-add",
1017 [UCI_CMD_LIST_DEL] = "list-del",
1018 [UCI_CMD_CHANGE] = "set",
1019 };
1020
1021 if (!d->section)
1022 return;
1023
1024 c = blobmsg_open_array(&buf, NULL);
1025
1026 blobmsg_add_string(&buf, NULL, types[d->cmd]);
1027 blobmsg_add_string(&buf, NULL, d->section);
1028
1029 if (d->e.name)
1030 blobmsg_add_string(&buf, NULL, d->e.name);
1031
1032 if (d->value)
1033 {
1034 if (d->cmd == UCI_CMD_REORDER)
1035 blobmsg_add_u32(&buf, NULL, strtoul(d->value, NULL, 10));
1036 else
1037 blobmsg_add_string(&buf, NULL, d->value);
1038 }
1039
1040 blobmsg_close_array(&buf, c);
1041 }
1042
1043 static int
1044 rpc_uci_changes(struct ubus_context *ctx, struct ubus_object *obj,
1045 struct ubus_request_data *req, const char *method,
1046 struct blob_attr *msg)
1047 {
1048 struct blob_attr *tb[__RPC_C_MAX];
1049 struct uci_package *p = NULL;
1050 struct uci_element *e;
1051 char **configs;
1052 void *c, *d;
1053 int i;
1054
1055 blobmsg_parse(rpc_uci_config_policy, __RPC_C_MAX, tb,
1056 blob_data(msg), blob_len(msg));
1057
1058 if (tb[RPC_C_CONFIG])
1059 {
1060 if (!rpc_uci_read_access(tb[RPC_C_SESSION], tb[RPC_C_CONFIG]))
1061 return UBUS_STATUS_PERMISSION_DENIED;
1062
1063 if (uci_load(cursor, blobmsg_data(tb[RPC_C_CONFIG]), &p))
1064 return rpc_uci_status();
1065
1066 blob_buf_init(&buf, 0);
1067 c = blobmsg_open_array(&buf, "changes");
1068
1069 uci_foreach_element(&p->saved_delta, e)
1070 rpc_uci_dump_change(uci_to_delta(e));
1071
1072 blobmsg_close_array(&buf, c);
1073
1074 uci_unload(cursor, p);
1075
1076 ubus_send_reply(ctx, req, buf.head);
1077
1078 return rpc_uci_status();
1079 }
1080
1081 rpc_uci_set_savedir(tb[RPC_C_SESSION]);
1082
1083 if (uci_list_configs(cursor, &configs))
1084 return rpc_uci_status();
1085
1086 blob_buf_init(&buf, 0);
1087
1088 c = blobmsg_open_table(&buf, "changes");
1089
1090 for (i = 0; configs[i]; i++)
1091 {
1092 if (tb[RPC_C_SESSION] &&
1093 !rpc_session_access(blobmsg_data(tb[RPC_C_SESSION]), "uci",
1094 configs[i], "read"))
1095 continue;
1096
1097 if (uci_load(cursor, configs[i], &p))
1098 continue;
1099
1100 if (!uci_list_empty(&p->saved_delta))
1101 {
1102 d = blobmsg_open_array(&buf, configs[i]);
1103
1104 uci_foreach_element(&p->saved_delta, e)
1105 rpc_uci_dump_change(uci_to_delta(e));
1106
1107 blobmsg_close_array(&buf, d);
1108 }
1109
1110 uci_unload(cursor, p);
1111 }
1112
1113 blobmsg_close_table(&buf, c);
1114
1115 ubus_send_reply(ctx, req, buf.head);
1116
1117 return 0;
1118 }
1119
1120 static void
1121 rpc_uci_trigger_event(struct ubus_context *ctx, const char *config)
1122 {
1123 char *pkg = strdup(config);
1124 static struct blob_buf b;
1125 uint32_t id;
1126
1127 if (!ubus_lookup_id(ctx, "service", &id)) {
1128 void *c;
1129
1130 blob_buf_init(&b, 0);
1131 blobmsg_add_string(&b, "type", "config.change");
1132 c = blobmsg_open_table(&b, "data");
1133 blobmsg_add_string(&b, "package", pkg);
1134 blobmsg_close_table(&b, c);
1135 ubus_invoke(ctx, id, "event", b.head, NULL, 0, 1000);
1136 }
1137 free(pkg);
1138 }
1139
1140 static int
1141 rpc_uci_revert_commit(struct ubus_context *ctx, struct blob_attr *msg, bool commit)
1142 {
1143 struct blob_attr *tb[__RPC_C_MAX];
1144 struct uci_package *p = NULL;
1145 struct uci_ptr ptr = { 0 };
1146
1147 if (apply_sid[0])
1148 return UBUS_STATUS_PERMISSION_DENIED;
1149
1150 blobmsg_parse(rpc_uci_config_policy, __RPC_C_MAX, tb,
1151 blob_data(msg), blob_len(msg));
1152
1153 if (!tb[RPC_C_CONFIG])
1154 return UBUS_STATUS_INVALID_ARGUMENT;
1155
1156 if (!rpc_uci_write_access(tb[RPC_C_SESSION], tb[RPC_C_CONFIG]))
1157 return UBUS_STATUS_PERMISSION_DENIED;
1158
1159 ptr.package = blobmsg_data(tb[RPC_C_CONFIG]);
1160
1161 if (commit)
1162 {
1163 if (!uci_load(cursor, ptr.package, &p))
1164 {
1165 uci_commit(cursor, &p, false);
1166 uci_unload(cursor, p);
1167 rpc_uci_trigger_event(ctx, blobmsg_get_string(tb[RPC_C_CONFIG]));
1168 }
1169 }
1170 else
1171 {
1172 if (!uci_lookup_ptr(cursor, &ptr, NULL, true) && ptr.p)
1173 {
1174 uci_revert(cursor, &ptr);
1175 uci_unload(cursor, ptr.p);
1176 }
1177 }
1178
1179 return rpc_uci_status();
1180 }
1181
1182 static int
1183 rpc_uci_revert(struct ubus_context *ctx, struct ubus_object *obj,
1184 struct ubus_request_data *req, const char *method,
1185 struct blob_attr *msg)
1186 {
1187 return rpc_uci_revert_commit(ctx, msg, false);
1188 }
1189
1190 static int
1191 rpc_uci_commit(struct ubus_context *ctx, struct ubus_object *obj,
1192 struct ubus_request_data *req, const char *method,
1193 struct blob_attr *msg)
1194 {
1195 return rpc_uci_revert_commit(ctx, msg, true);
1196 }
1197
1198 static int
1199 rpc_uci_configs(struct ubus_context *ctx, struct ubus_object *obj,
1200 struct ubus_request_data *req, const char *method,
1201 struct blob_attr *msg)
1202 {
1203 char **configs;
1204 void *c;
1205 int i;
1206
1207 if (uci_list_configs(cursor, &configs))
1208 goto out;
1209
1210 blob_buf_init(&buf, 0);
1211
1212 c = blobmsg_open_array(&buf, "configs");
1213
1214 for (i = 0; configs[i]; i++)
1215 blobmsg_add_string(&buf, NULL, configs[i]);
1216
1217 blobmsg_close_array(&buf, c);
1218
1219 ubus_send_reply(ctx, req, buf.head);
1220
1221 out:
1222 return rpc_uci_status();
1223 }
1224
1225
1226 /*
1227 * Remove given delta save directory (if any).
1228 */
1229 static void
1230 rpc_uci_purge_dir(const char *path)
1231 {
1232 DIR *d;
1233 struct stat s;
1234 struct dirent *e;
1235 char file[PATH_MAX];
1236
1237 if (stat(path, &s) || !S_ISDIR(s.st_mode))
1238 return;
1239
1240 if ((d = opendir(path)) != NULL)
1241 {
1242 while ((e = readdir(d)) != NULL)
1243 {
1244 snprintf(file, sizeof(file) - 1, "%s/%s", path, e->d_name);
1245
1246 if (stat(file, &s) || !S_ISREG(s.st_mode))
1247 continue;
1248
1249 unlink(file);
1250 }
1251
1252 closedir(d);
1253
1254 rmdir(path);
1255 }
1256 }
1257
1258 static int
1259 rpc_uci_apply_config(struct ubus_context *ctx, char *config)
1260 {
1261 struct uci_package *p = NULL;
1262
1263 if (!uci_load(cursor, config, &p)) {
1264 uci_commit(cursor, &p, false);
1265 uci_unload(cursor, p);
1266 }
1267 rpc_uci_trigger_event(ctx, config);
1268
1269 return 0;
1270 }
1271
1272 static void
1273 rpc_uci_copy_file(const char *src, const char *target, const char *file)
1274 {
1275 char tmp[256];
1276 FILE *in, *out;
1277
1278 snprintf(tmp, sizeof(tmp), "%s%s", src, file);
1279 in = fopen(tmp, "rb");
1280 snprintf(tmp, sizeof(tmp), "%s%s", target, file);
1281 out = fopen(tmp, "wb+");
1282 if (in && out)
1283 while (!feof(in)) {
1284 int len = fread(tmp, 1, sizeof(tmp), in);
1285
1286 if(len > 0)
1287 fwrite(tmp, 1, len, out);
1288 }
1289 if(in)
1290 fclose(in);
1291 if(out)
1292 fclose(out);
1293 }
1294
1295 static int
1296 rpc_uci_apply_access(const char *sid, glob_t *gl)
1297 {
1298 struct stat s;
1299 int i, c = 0;
1300
1301 if (gl->gl_pathc < 3)
1302 return UBUS_STATUS_NO_DATA;
1303
1304 for (i = 0; i < gl->gl_pathc; i++) {
1305 char *config = basename(gl->gl_pathv[i]);
1306
1307 if (*config == '.')
1308 continue;
1309 if (stat(gl->gl_pathv[i], &s) || !s.st_size)
1310 continue;
1311 if (!rpc_session_access(sid, "uci", config, "write"))
1312 return UBUS_STATUS_PERMISSION_DENIED;
1313 c++;
1314 }
1315
1316 if (!c)
1317 return UBUS_STATUS_NO_DATA;
1318
1319 return 0;
1320 }
1321
1322 static void
1323 rpc_uci_do_rollback(struct ubus_context *ctx, glob_t *gl)
1324 {
1325 int i, deny;
1326 char tmp[PATH_MAX];
1327
1328 /* Test apply permission to see if the initiator session still exists.
1329 * If it does, restore the delta files as well, else just restore the
1330 * main configuration files. */
1331 deny = apply_sid[0]
1332 ? rpc_uci_apply_access(apply_sid, gl) : UBUS_STATUS_NOT_FOUND;
1333
1334 if (!deny) {
1335 snprintf(tmp, sizeof(tmp), RPC_UCI_SAVEDIR_PREFIX "%s/", apply_sid);
1336 mkdir(tmp, 0700);
1337 }
1338
1339 /* avoid merging unrelated uci changes when restoring old configs */
1340 rpc_uci_replace_savedir("/dev/null");
1341
1342 for (i = 0; i < gl->gl_pathc; i++) {
1343 char *config = basename(gl->gl_pathv[i]);
1344
1345 if (*config == '.')
1346 continue;
1347
1348 rpc_uci_copy_file(RPC_SNAPSHOT_FILES, RPC_UCI_DIR, config);
1349 rpc_uci_apply_config(ctx, config);
1350
1351 if (deny)
1352 continue;
1353
1354 rpc_uci_copy_file(RPC_SNAPSHOT_DELTA, tmp, config);
1355 }
1356
1357 rpc_uci_purge_dir(RPC_SNAPSHOT_FILES);
1358 rpc_uci_purge_dir(RPC_SNAPSHOT_DELTA);
1359
1360 uloop_timeout_cancel(&apply_timer);
1361 memset(apply_sid, 0, sizeof(apply_sid));
1362 apply_ctx = NULL;
1363 }
1364
1365 static void
1366 rpc_uci_apply_timeout(struct uloop_timeout *t)
1367 {
1368 glob_t gl;
1369 char tmp[PATH_MAX];
1370
1371 snprintf(tmp, sizeof(tmp), "%s/*", RPC_SNAPSHOT_FILES);
1372 if (glob(tmp, GLOB_PERIOD, NULL, &gl) < 0)
1373 return;
1374
1375 rpc_uci_do_rollback(apply_ctx, &gl);
1376
1377 globfree(&gl);
1378 }
1379
1380 static int
1381 rpc_uci_apply(struct ubus_context *ctx, struct ubus_object *obj,
1382 struct ubus_request_data *req, const char *method,
1383 struct blob_attr *msg)
1384 {
1385 struct blob_attr *tb[__RPC_T_MAX];
1386 int timeout = RPC_APPLY_TIMEOUT;
1387 char tmp[PATH_MAX];
1388 bool rollback = false;
1389 int ret, i;
1390 char *sid;
1391 glob_t gl;
1392
1393 blobmsg_parse(rpc_uci_apply_policy, __RPC_T_MAX, tb,
1394 blob_data(msg), blob_len(msg));
1395
1396 if (tb[RPC_T_ROLLBACK])
1397 rollback = blobmsg_get_bool(tb[RPC_T_ROLLBACK]);
1398
1399 if (apply_sid[0] && rollback)
1400 return UBUS_STATUS_PERMISSION_DENIED;
1401
1402 if (!tb[RPC_T_SESSION])
1403 return UBUS_STATUS_INVALID_ARGUMENT;
1404
1405 sid = blobmsg_data(tb[RPC_T_SESSION]);
1406
1407 if (tb[RPC_T_TIMEOUT])
1408 timeout = blobmsg_get_u32(tb[RPC_T_TIMEOUT]);
1409
1410 rpc_uci_purge_dir(RPC_SNAPSHOT_FILES);
1411 rpc_uci_purge_dir(RPC_SNAPSHOT_DELTA);
1412
1413 if (!apply_sid[0]) {
1414 rpc_uci_set_savedir(tb[RPC_T_SESSION]);
1415
1416 mkdir(RPC_SNAPSHOT_FILES, 0700);
1417 mkdir(RPC_SNAPSHOT_DELTA, 0700);
1418
1419 snprintf(tmp, sizeof(tmp), RPC_UCI_SAVEDIR_PREFIX "%s/*", sid);
1420 if (glob(tmp, GLOB_PERIOD, NULL, &gl) < 0)
1421 return UBUS_STATUS_NOT_FOUND;
1422
1423 snprintf(tmp, sizeof(tmp), RPC_UCI_SAVEDIR_PREFIX "%s/", sid);
1424
1425 ret = rpc_uci_apply_access(sid, &gl);
1426 if (ret) {
1427 globfree(&gl);
1428 return ret;
1429 }
1430
1431 /* copy SID early because rpc_uci_apply_config() will clobber buf */
1432 if (rollback)
1433 strncpy(apply_sid, sid, RPC_SID_LEN);
1434
1435 for (i = 0; i < gl.gl_pathc; i++) {
1436 char *config = basename(gl.gl_pathv[i]);
1437 struct stat s;
1438
1439 if (*config == '.')
1440 continue;
1441
1442 if (stat(gl.gl_pathv[i], &s) || !s.st_size)
1443 continue;
1444
1445 rpc_uci_copy_file(RPC_UCI_DIR, RPC_SNAPSHOT_FILES, config);
1446 rpc_uci_copy_file(tmp, RPC_SNAPSHOT_DELTA, config);
1447 rpc_uci_apply_config(ctx, config);
1448 }
1449
1450 globfree(&gl);
1451
1452 if (rollback) {
1453 apply_timer.cb = rpc_uci_apply_timeout;
1454 uloop_timeout_set(&apply_timer, timeout * 1000);
1455 apply_ctx = ctx;
1456 }
1457 }
1458
1459 return 0;
1460 }
1461
1462 static int
1463 rpc_uci_confirm(struct ubus_context *ctx, struct ubus_object *obj,
1464 struct ubus_request_data *req, const char *method,
1465 struct blob_attr *msg)
1466 {
1467 struct blob_attr *tb[__RPC_B_MAX];
1468 char *sid;
1469
1470 blobmsg_parse(rpc_uci_rollback_policy, __RPC_B_MAX, tb,
1471 blob_data(msg), blob_len(msg));
1472
1473 if (!tb[RPC_B_SESSION])
1474 return UBUS_STATUS_INVALID_ARGUMENT;
1475
1476 sid = blobmsg_data(tb[RPC_B_SESSION]);
1477
1478 if (!apply_sid[0])
1479 return UBUS_STATUS_NO_DATA;
1480
1481 if (strcmp(apply_sid, sid))
1482 return UBUS_STATUS_PERMISSION_DENIED;
1483
1484 rpc_uci_purge_dir(RPC_SNAPSHOT_FILES);
1485 rpc_uci_purge_dir(RPC_SNAPSHOT_DELTA);
1486
1487 uloop_timeout_cancel(&apply_timer);
1488 memset(apply_sid, 0, sizeof(apply_sid));
1489 apply_ctx = NULL;
1490
1491 return 0;
1492 }
1493
1494 static int
1495 rpc_uci_rollback(struct ubus_context *ctx, struct ubus_object *obj,
1496 struct ubus_request_data *req, const char *method,
1497 struct blob_attr *msg)
1498 {
1499 struct blob_attr *tb[__RPC_B_MAX];
1500 char tmp[PATH_MAX];
1501 glob_t gl;
1502 char *sid;
1503
1504 blobmsg_parse(rpc_uci_rollback_policy, __RPC_B_MAX, tb,
1505 blob_data(msg), blob_len(msg));
1506
1507 if (!apply_sid[0])
1508 return UBUS_STATUS_NO_DATA;
1509
1510 if (!tb[RPC_B_SESSION])
1511 return UBUS_STATUS_INVALID_ARGUMENT;
1512
1513 sid = blobmsg_data(tb[RPC_B_SESSION]);
1514
1515 if (strcmp(apply_sid, sid))
1516 return UBUS_STATUS_PERMISSION_DENIED;
1517
1518 snprintf(tmp, sizeof(tmp), "%s/*", RPC_SNAPSHOT_FILES);
1519 if (glob(tmp, GLOB_PERIOD, NULL, &gl) < 0)
1520 return UBUS_STATUS_NOT_FOUND;
1521
1522 rpc_uci_do_rollback(ctx, &gl);
1523
1524 globfree(&gl);
1525
1526 return 0;
1527 }
1528
1529 static int
1530 rpc_uci_reload(struct ubus_context *ctx, struct ubus_object *obj,
1531 struct ubus_request_data *req, const char *method,
1532 struct blob_attr *msg)
1533 {
1534 char * const cmd[2] = { "/sbin/reload_config", NULL };
1535
1536 if (!fork()) {
1537 /* wait for the RPC call to complete */
1538 sleep(2);
1539 return execv(cmd[0], cmd);
1540 }
1541
1542 return 0;
1543 }
1544
1545 /*
1546 * Session destroy callback to purge associated delta directory.
1547 */
1548 static void
1549 rpc_uci_purge_savedir_cb(struct rpc_session *ses, void *priv)
1550 {
1551 char path[PATH_MAX];
1552
1553 snprintf(path, sizeof(path) - 1, RPC_UCI_SAVEDIR_PREFIX "%s", ses->id);
1554 rpc_uci_purge_dir(path);
1555 }
1556
1557 /*
1558 * Removes all delta directories which match the RPC_UCI_SAVEDIR_PREFIX.
1559 * This is used to clean up garbage when starting rpcd.
1560 */
1561 void rpc_uci_purge_savedirs(void)
1562 {
1563 int i;
1564 glob_t gl;
1565
1566 if (!glob(RPC_UCI_SAVEDIR_PREFIX "*", 0, NULL, &gl))
1567 {
1568 for (i = 0; i < gl.gl_pathc; i++)
1569 rpc_uci_purge_dir(gl.gl_pathv[i]);
1570
1571 globfree(&gl);
1572 }
1573 }
1574
1575 int rpc_uci_api_init(struct ubus_context *ctx)
1576 {
1577 static const struct ubus_method uci_methods[] = {
1578 { .name = "configs", .handler = rpc_uci_configs },
1579 UBUS_METHOD("get", rpc_uci_get, rpc_uci_get_policy),
1580 UBUS_METHOD("state", rpc_uci_state, rpc_uci_get_policy),
1581 UBUS_METHOD("add", rpc_uci_add, rpc_uci_add_policy),
1582 UBUS_METHOD("set", rpc_uci_set, rpc_uci_set_policy),
1583 UBUS_METHOD("delete", rpc_uci_delete, rpc_uci_delete_policy),
1584 UBUS_METHOD("rename", rpc_uci_rename, rpc_uci_rename_policy),
1585 UBUS_METHOD("order", rpc_uci_order, rpc_uci_order_policy),
1586 UBUS_METHOD("changes", rpc_uci_changes, rpc_uci_config_policy),
1587 UBUS_METHOD("revert", rpc_uci_revert, rpc_uci_config_policy),
1588 UBUS_METHOD("commit", rpc_uci_commit, rpc_uci_config_policy),
1589 UBUS_METHOD("apply", rpc_uci_apply, rpc_uci_apply_policy),
1590 UBUS_METHOD("confirm", rpc_uci_confirm, rpc_uci_rollback_policy),
1591 UBUS_METHOD("rollback", rpc_uci_rollback, rpc_uci_rollback_policy),
1592 UBUS_METHOD_NOARG("reload_config", rpc_uci_reload),
1593 };
1594
1595 static struct ubus_object_type uci_type =
1596 UBUS_OBJECT_TYPE("luci-rpc-uci", uci_methods);
1597
1598 static struct ubus_object obj = {
1599 .name = "uci",
1600 .type = &uci_type,
1601 .methods = uci_methods,
1602 .n_methods = ARRAY_SIZE(uci_methods),
1603 };
1604
1605 static struct rpc_session_cb cb = {
1606 .cb = rpc_uci_purge_savedir_cb
1607 };
1608
1609 cursor = uci_alloc_context();
1610
1611 if (!cursor)
1612 return UBUS_STATUS_UNKNOWN_ERROR;
1613
1614 rpc_session_destroy_cb(&cb);
1615
1616 return ubus_add_object(ctx, &obj);
1617 }
OpenWrt ubus RPC daemon