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